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[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
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252b5132 1/* 32-bit ELF support for ARM
b3adc24a 2 Copyright (C) 1998-2020 Free Software Foundation, Inc.
252b5132
RH		 3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
cd123cb7 8 the Free Software Foundation; either version 3 of the License, or
252b5132
RH		 9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
cd123cb7
NC		 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
252b5132 20
6e6718a3 21#include "sysdep.h"
2468f9c9
PB		 22#include <limits.h>
23
3db64b00 24#include "bfd.h"
00a97672 25#include "libiberty.h"
7f266840
DJ		 26#include "libbfd.h"
27#include "elf-bfd.h"
b38cadfb 28#include "elf-nacl.h"
00a97672 29#include "elf-vxworks.h"
ee065d83 30#include "elf/arm.h"
f37164d7
AM		 31#include "elf32-arm.h"
32#include "cpu-arm.h"
7f266840 33
00a97672
RS		 34/* Return the relocation section associated with NAME. HTAB is the
35 bfd's elf32_arm_link_hash_entry. */
36#define RELOC_SECTION(HTAB, NAME) \
37 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
38
39/* Return size of a relocation entry. HTAB is the bfd's
40 elf32_arm_link_hash_entry. */
41#define RELOC_SIZE(HTAB) \
42 ((HTAB)->use_rel \
43 ? sizeof (Elf32_External_Rel) \
44 : sizeof (Elf32_External_Rela))
45
46/* Return function to swap relocations in. HTAB is the bfd's
47 elf32_arm_link_hash_entry. */
48#define SWAP_RELOC_IN(HTAB) \
49 ((HTAB)->use_rel \
50 ? bfd_elf32_swap_reloc_in \
51 : bfd_elf32_swap_reloca_in)
52
53/* Return function to swap relocations out. HTAB is the bfd's
54 elf32_arm_link_hash_entry. */
55#define SWAP_RELOC_OUT(HTAB) \
56 ((HTAB)->use_rel \
57 ? bfd_elf32_swap_reloc_out \
58 : bfd_elf32_swap_reloca_out)
59
f3185997 60#define elf_info_to_howto NULL
07d6d2b8 61#define elf_info_to_howto_rel elf32_arm_info_to_howto
7f266840
DJ		 62
63#define ARM_ELF_ABI_VERSION 0
64#define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
65
79f08007
YZ		 66/* The Adjusted Place, as defined by AAELF. */
67#define Pa(X) ((X) & 0xfffffffc)
68
3e6b1042
DJ		 69static bfd_boolean elf32_arm_write_section (bfd *output_bfd,
70 struct bfd_link_info *link_info,
71 asection *sec,
72 bfd_byte *contents);
73
7f266840
DJ		 74/* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
75 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
76 in that slot. */
77
c19d1205 78static reloc_howto_type elf32_arm_howto_table_1[] =
7f266840 79{
8029a119 80 /* No relocation. */
7f266840
DJ		 81 HOWTO (R_ARM_NONE, /* type */
82 0, /* rightshift */
6346d5ca 83 3, /* size (0 = byte, 1 = short, 2 = long) */
7f266840
DJ		 84 0, /* bitsize */
85 FALSE, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_dont,/* complain_on_overflow */
88 bfd_elf_generic_reloc, /* special_function */
89 "R_ARM_NONE", /* name */
90 FALSE, /* partial_inplace */
91 0, /* src_mask */
92 0, /* dst_mask */
93 FALSE), /* pcrel_offset */
94
95 HOWTO (R_ARM_PC24, /* type */
96 2, /* rightshift */
97 2, /* size (0 = byte, 1 = short, 2 = long) */
98 24, /* bitsize */
99 TRUE, /* pc_relative */
100 0, /* bitpos */
101 complain_overflow_signed,/* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_ARM_PC24", /* name */
104 FALSE, /* partial_inplace */
105 0x00ffffff, /* src_mask */
106 0x00ffffff, /* dst_mask */
107 TRUE), /* pcrel_offset */
108
109 /* 32 bit absolute */
110 HOWTO (R_ARM_ABS32, /* type */
111 0, /* rightshift */
112 2, /* size (0 = byte, 1 = short, 2 = long) */
113 32, /* bitsize */
114 FALSE, /* pc_relative */
115 0, /* bitpos */
116 complain_overflow_bitfield,/* complain_on_overflow */
117 bfd_elf_generic_reloc, /* special_function */
118 "R_ARM_ABS32", /* name */
119 FALSE, /* partial_inplace */
120 0xffffffff, /* src_mask */
121 0xffffffff, /* dst_mask */
122 FALSE), /* pcrel_offset */
123
124 /* standard 32bit pc-relative reloc */
125 HOWTO (R_ARM_REL32, /* type */
126 0, /* rightshift */
127 2, /* size (0 = byte, 1 = short, 2 = long) */
128 32, /* bitsize */
129 TRUE, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_bitfield,/* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_ARM_REL32", /* name */
134 FALSE, /* partial_inplace */
135 0xffffffff, /* src_mask */
136 0xffffffff, /* dst_mask */
137 TRUE), /* pcrel_offset */
138
c19d1205 139 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
4962c51a 140 HOWTO (R_ARM_LDR_PC_G0, /* type */
7f266840
DJ		 141 0, /* rightshift */
142 0, /* size (0 = byte, 1 = short, 2 = long) */
4962c51a
MS		 143 32, /* bitsize */
144 TRUE, /* pc_relative */
7f266840 145 0, /* bitpos */
4962c51a 146 complain_overflow_dont,/* complain_on_overflow */
7f266840 147 bfd_elf_generic_reloc, /* special_function */
4962c51a 148 "R_ARM_LDR_PC_G0", /* name */
7f266840 149 FALSE, /* partial_inplace */
4962c51a
MS		 150 0xffffffff, /* src_mask */
151 0xffffffff, /* dst_mask */
152 TRUE), /* pcrel_offset */
7f266840
DJ		 153
154 /* 16 bit absolute */
155 HOWTO (R_ARM_ABS16, /* type */
156 0, /* rightshift */
157 1, /* size (0 = byte, 1 = short, 2 = long) */
158 16, /* bitsize */
159 FALSE, /* pc_relative */
160 0, /* bitpos */
161 complain_overflow_bitfield,/* complain_on_overflow */
162 bfd_elf_generic_reloc, /* special_function */
163 "R_ARM_ABS16", /* name */
164 FALSE, /* partial_inplace */
165 0x0000ffff, /* src_mask */
166 0x0000ffff, /* dst_mask */
167 FALSE), /* pcrel_offset */
168
169 /* 12 bit absolute */
170 HOWTO (R_ARM_ABS12, /* type */
171 0, /* rightshift */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
173 12, /* bitsize */
174 FALSE, /* pc_relative */
175 0, /* bitpos */
176 complain_overflow_bitfield,/* complain_on_overflow */
177 bfd_elf_generic_reloc, /* special_function */
178 "R_ARM_ABS12", /* name */
179 FALSE, /* partial_inplace */
00a97672
RS		 180 0x00000fff, /* src_mask */
181 0x00000fff, /* dst_mask */
7f266840
DJ		 182 FALSE), /* pcrel_offset */
183
184 HOWTO (R_ARM_THM_ABS5, /* type */
185 6, /* rightshift */
186 1, /* size (0 = byte, 1 = short, 2 = long) */
187 5, /* bitsize */
188 FALSE, /* pc_relative */
189 0, /* bitpos */
190 complain_overflow_bitfield,/* complain_on_overflow */
191 bfd_elf_generic_reloc, /* special_function */
192 "R_ARM_THM_ABS5", /* name */
193 FALSE, /* partial_inplace */
194 0x000007e0, /* src_mask */
195 0x000007e0, /* dst_mask */
196 FALSE), /* pcrel_offset */
197
198 /* 8 bit absolute */
199 HOWTO (R_ARM_ABS8, /* type */
200 0, /* rightshift */
201 0, /* size (0 = byte, 1 = short, 2 = long) */
202 8, /* bitsize */
203 FALSE, /* pc_relative */
204 0, /* bitpos */
205 complain_overflow_bitfield,/* complain_on_overflow */
206 bfd_elf_generic_reloc, /* special_function */
207 "R_ARM_ABS8", /* name */
208 FALSE, /* partial_inplace */
209 0x000000ff, /* src_mask */
210 0x000000ff, /* dst_mask */
211 FALSE), /* pcrel_offset */
212
213 HOWTO (R_ARM_SBREL32, /* type */
214 0, /* rightshift */
215 2, /* size (0 = byte, 1 = short, 2 = long) */
216 32, /* bitsize */
217 FALSE, /* pc_relative */
218 0, /* bitpos */
219 complain_overflow_dont,/* complain_on_overflow */
220 bfd_elf_generic_reloc, /* special_function */
221 "R_ARM_SBREL32", /* name */
222 FALSE, /* partial_inplace */
223 0xffffffff, /* src_mask */
224 0xffffffff, /* dst_mask */
225 FALSE), /* pcrel_offset */
226
c19d1205 227 HOWTO (R_ARM_THM_CALL, /* type */
7f266840
DJ		 228 1, /* rightshift */
229 2, /* size (0 = byte, 1 = short, 2 = long) */
f6ebfac0 230 24, /* bitsize */
7f266840
DJ		 231 TRUE, /* pc_relative */
232 0, /* bitpos */
233 complain_overflow_signed,/* complain_on_overflow */
234 bfd_elf_generic_reloc, /* special_function */
c19d1205 235 "R_ARM_THM_CALL", /* name */
7f266840 236 FALSE, /* partial_inplace */
7f6ab9f8
AM		 237 0x07ff2fff, /* src_mask */
238 0x07ff2fff, /* dst_mask */
7f266840
DJ		 239 TRUE), /* pcrel_offset */
240
07d6d2b8 241 HOWTO (R_ARM_THM_PC8, /* type */
7f266840
DJ		 242 1, /* rightshift */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
244 8, /* bitsize */
245 TRUE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_signed,/* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_ARM_THM_PC8", /* name */
250 FALSE, /* partial_inplace */
251 0x000000ff, /* src_mask */
252 0x000000ff, /* dst_mask */
253 TRUE), /* pcrel_offset */
254
c19d1205 255 HOWTO (R_ARM_BREL_ADJ, /* type */
7f266840
DJ		 256 1, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
c19d1205
ZW		 258 32, /* bitsize */
259 FALSE, /* pc_relative */
7f266840
DJ		 260 0, /* bitpos */
261 complain_overflow_signed,/* complain_on_overflow */
262 bfd_elf_generic_reloc, /* special_function */
c19d1205 263 "R_ARM_BREL_ADJ", /* name */
7f266840 264 FALSE, /* partial_inplace */
c19d1205
ZW		 265 0xffffffff, /* src_mask */
266 0xffffffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
7f266840 268
0855e32b 269 HOWTO (R_ARM_TLS_DESC, /* type */
7f266840 270 0, /* rightshift */
0855e32b
NS		 271 2, /* size (0 = byte, 1 = short, 2 = long) */
272 32, /* bitsize */
7f266840
DJ		 273 FALSE, /* pc_relative */
274 0, /* bitpos */
0855e32b 275 complain_overflow_bitfield,/* complain_on_overflow */
7f266840 276 bfd_elf_generic_reloc, /* special_function */
0855e32b 277 "R_ARM_TLS_DESC", /* name */
7f266840 278 FALSE, /* partial_inplace */
0855e32b
NS		 279 0xffffffff, /* src_mask */
280 0xffffffff, /* dst_mask */
7f266840
DJ		 281 FALSE), /* pcrel_offset */
282
283 HOWTO (R_ARM_THM_SWI8, /* type */
284 0, /* rightshift */
285 0, /* size (0 = byte, 1 = short, 2 = long) */
286 0, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_signed,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_ARM_SWI8", /* name */
292 FALSE, /* partial_inplace */
293 0x00000000, /* src_mask */
294 0x00000000, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* BLX instruction for the ARM. */
298 HOWTO (R_ARM_XPC25, /* type */
299 2, /* rightshift */
300 2, /* size (0 = byte, 1 = short, 2 = long) */
7f6ab9f8 301 24, /* bitsize */
7f266840
DJ		 302 TRUE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_signed,/* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_ARM_XPC25", /* name */
307 FALSE, /* partial_inplace */
308 0x00ffffff, /* src_mask */
309 0x00ffffff, /* dst_mask */
310 TRUE), /* pcrel_offset */
311
312 /* BLX instruction for the Thumb. */
313 HOWTO (R_ARM_THM_XPC22, /* type */
314 2, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
7f6ab9f8 316 24, /* bitsize */
7f266840
DJ		 317 TRUE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed,/* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_ARM_THM_XPC22", /* name */
322 FALSE, /* partial_inplace */
7f6ab9f8
AM		 323 0x07ff2fff, /* src_mask */
324 0x07ff2fff, /* dst_mask */
7f266840
DJ		 325 TRUE), /* pcrel_offset */
326
ba93b8ac 327 /* Dynamic TLS relocations. */
7f266840 328
ba93b8ac 329 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
07d6d2b8
AM		 330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 32, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
99059e56
RM		 335 complain_overflow_bitfield,/* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_ARM_TLS_DTPMOD32", /* name */
338 TRUE, /* partial_inplace */
339 0xffffffff, /* src_mask */
340 0xffffffff, /* dst_mask */
07d6d2b8 341 FALSE), /* pcrel_offset */
7f266840 342
ba93b8ac 343 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
07d6d2b8
AM		 344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 32, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
99059e56
RM		 349 complain_overflow_bitfield,/* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_ARM_TLS_DTPOFF32", /* name */
352 TRUE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
07d6d2b8 355 FALSE), /* pcrel_offset */
7f266840 356
ba93b8ac 357 HOWTO (R_ARM_TLS_TPOFF32, /* type */
07d6d2b8
AM		 358 0, /* rightshift */
359 2, /* size (0 = byte, 1 = short, 2 = long) */
360 32, /* bitsize */
361 FALSE, /* pc_relative */
362 0, /* bitpos */
99059e56
RM		 363 complain_overflow_bitfield,/* complain_on_overflow */
364 bfd_elf_generic_reloc, /* special_function */
365 "R_ARM_TLS_TPOFF32", /* name */
366 TRUE, /* partial_inplace */
367 0xffffffff, /* src_mask */
368 0xffffffff, /* dst_mask */
07d6d2b8 369 FALSE), /* pcrel_offset */
7f266840
DJ		 370
371 /* Relocs used in ARM Linux */
372
373 HOWTO (R_ARM_COPY, /* type */
07d6d2b8
AM		 374 0, /* rightshift */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
376 32, /* bitsize */
377 FALSE, /* pc_relative */
378 0, /* bitpos */
99059e56
RM		 379 complain_overflow_bitfield,/* complain_on_overflow */
380 bfd_elf_generic_reloc, /* special_function */
381 "R_ARM_COPY", /* name */
382 TRUE, /* partial_inplace */
383 0xffffffff, /* src_mask */
384 0xffffffff, /* dst_mask */
07d6d2b8 385 FALSE), /* pcrel_offset */
7f266840
DJ		 386
387 HOWTO (R_ARM_GLOB_DAT, /* type */
07d6d2b8
AM		 388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 32, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
99059e56
RM		 393 complain_overflow_bitfield,/* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_ARM_GLOB_DAT", /* name */
396 TRUE, /* partial_inplace */
397 0xffffffff, /* src_mask */
398 0xffffffff, /* dst_mask */
07d6d2b8 399 FALSE), /* pcrel_offset */
7f266840
DJ		 400
401 HOWTO (R_ARM_JUMP_SLOT, /* type */
07d6d2b8
AM		 402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 32, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
99059e56
RM		 407 complain_overflow_bitfield,/* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_ARM_JUMP_SLOT", /* name */
410 TRUE, /* partial_inplace */
411 0xffffffff, /* src_mask */
412 0xffffffff, /* dst_mask */
07d6d2b8 413 FALSE), /* pcrel_offset */
7f266840
DJ		 414
415 HOWTO (R_ARM_RELATIVE, /* type */
07d6d2b8
AM		 416 0, /* rightshift */
417 2, /* size (0 = byte, 1 = short, 2 = long) */
418 32, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
99059e56
RM		 421 complain_overflow_bitfield,/* complain_on_overflow */
422 bfd_elf_generic_reloc, /* special_function */
423 "R_ARM_RELATIVE", /* name */
424 TRUE, /* partial_inplace */
425 0xffffffff, /* src_mask */
426 0xffffffff, /* dst_mask */
07d6d2b8 427 FALSE), /* pcrel_offset */
7f266840 428
c19d1205 429 HOWTO (R_ARM_GOTOFF32, /* type */
07d6d2b8
AM		 430 0, /* rightshift */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
432 32, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
99059e56
RM		 435 complain_overflow_bitfield,/* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_ARM_GOTOFF32", /* name */
438 TRUE, /* partial_inplace */
439 0xffffffff, /* src_mask */
440 0xffffffff, /* dst_mask */
07d6d2b8 441 FALSE), /* pcrel_offset */
7f266840
DJ		 442
443 HOWTO (R_ARM_GOTPC, /* type */
07d6d2b8
AM		 444 0, /* rightshift */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
446 32, /* bitsize */
99059e56 447 TRUE, /* pc_relative */
07d6d2b8 448 0, /* bitpos */
99059e56
RM		 449 complain_overflow_bitfield,/* complain_on_overflow */
450 bfd_elf_generic_reloc, /* special_function */
451 "R_ARM_GOTPC", /* name */
452 TRUE, /* partial_inplace */
453 0xffffffff, /* src_mask */
454 0xffffffff, /* dst_mask */
455 TRUE), /* pcrel_offset */
7f266840
DJ		 456
457 HOWTO (R_ARM_GOT32, /* type */
07d6d2b8
AM		 458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 32, /* bitsize */
99059e56 461 FALSE, /* pc_relative */
07d6d2b8 462 0, /* bitpos */
99059e56
RM		 463 complain_overflow_bitfield,/* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_ARM_GOT32", /* name */
466 TRUE, /* partial_inplace */
467 0xffffffff, /* src_mask */
468 0xffffffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
7f266840
DJ		 470
471 HOWTO (R_ARM_PLT32, /* type */
07d6d2b8
AM		 472 2, /* rightshift */
473 2, /* size (0 = byte, 1 = short, 2 = long) */
474 24, /* bitsize */
99059e56 475 TRUE, /* pc_relative */
07d6d2b8 476 0, /* bitpos */
99059e56
RM		 477 complain_overflow_bitfield,/* complain_on_overflow */
478 bfd_elf_generic_reloc, /* special_function */
479 "R_ARM_PLT32", /* name */
480 FALSE, /* partial_inplace */
481 0x00ffffff, /* src_mask */
482 0x00ffffff, /* dst_mask */
483 TRUE), /* pcrel_offset */
7f266840
DJ		 484
485 HOWTO (R_ARM_CALL, /* type */
486 2, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 24, /* bitsize */
489 TRUE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_signed,/* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_ARM_CALL", /* name */
494 FALSE, /* partial_inplace */
495 0x00ffffff, /* src_mask */
496 0x00ffffff, /* dst_mask */
497 TRUE), /* pcrel_offset */
498
499 HOWTO (R_ARM_JUMP24, /* type */
500 2, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 24, /* bitsize */
503 TRUE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_signed,/* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_ARM_JUMP24", /* name */
508 FALSE, /* partial_inplace */
509 0x00ffffff, /* src_mask */
510 0x00ffffff, /* dst_mask */
511 TRUE), /* pcrel_offset */
512
c19d1205
ZW		 513 HOWTO (R_ARM_THM_JUMP24, /* type */
514 1, /* rightshift */
515 2, /* size (0 = byte, 1 = short, 2 = long) */
516 24, /* bitsize */
517 TRUE, /* pc_relative */
7f266840 518 0, /* bitpos */
c19d1205 519 complain_overflow_signed,/* complain_on_overflow */
7f266840 520 bfd_elf_generic_reloc, /* special_function */
c19d1205 521 "R_ARM_THM_JUMP24", /* name */
7f266840 522 FALSE, /* partial_inplace */
c19d1205
ZW		 523 0x07ff2fff, /* src_mask */
524 0x07ff2fff, /* dst_mask */
525 TRUE), /* pcrel_offset */
7f266840 526
c19d1205 527 HOWTO (R_ARM_BASE_ABS, /* type */
7f266840 528 0, /* rightshift */
c19d1205
ZW		 529 2, /* size (0 = byte, 1 = short, 2 = long) */
530 32, /* bitsize */
7f266840
DJ		 531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont,/* complain_on_overflow */
534 bfd_elf_generic_reloc, /* special_function */
c19d1205 535 "R_ARM_BASE_ABS", /* name */
7f266840 536 FALSE, /* partial_inplace */
c19d1205
ZW		 537 0xffffffff, /* src_mask */
538 0xffffffff, /* dst_mask */
7f266840
DJ		 539 FALSE), /* pcrel_offset */
540
541 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 12, /* bitsize */
545 TRUE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont,/* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_ARM_ALU_PCREL_7_0", /* name */
550 FALSE, /* partial_inplace */
551 0x00000fff, /* src_mask */
552 0x00000fff, /* dst_mask */
553 TRUE), /* pcrel_offset */
554
555 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
556 0, /* rightshift */
557 2, /* size (0 = byte, 1 = short, 2 = long) */
558 12, /* bitsize */
559 TRUE, /* pc_relative */
560 8, /* bitpos */
561 complain_overflow_dont,/* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_ARM_ALU_PCREL_15_8",/* name */
564 FALSE, /* partial_inplace */
565 0x00000fff, /* src_mask */
566 0x00000fff, /* dst_mask */
567 TRUE), /* pcrel_offset */
568
569 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
570 0, /* rightshift */
571 2, /* size (0 = byte, 1 = short, 2 = long) */
572 12, /* bitsize */
573 TRUE, /* pc_relative */
574 16, /* bitpos */
575 complain_overflow_dont,/* complain_on_overflow */
576 bfd_elf_generic_reloc, /* special_function */
577 "R_ARM_ALU_PCREL_23_15",/* name */
578 FALSE, /* partial_inplace */
579 0x00000fff, /* src_mask */
580 0x00000fff, /* dst_mask */
581 TRUE), /* pcrel_offset */
582
583 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
584 0, /* rightshift */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
586 12, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_dont,/* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_ARM_LDR_SBREL_11_0",/* name */
592 FALSE, /* partial_inplace */
593 0x00000fff, /* src_mask */
594 0x00000fff, /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
598 0, /* rightshift */
599 2, /* size (0 = byte, 1 = short, 2 = long) */
600 8, /* bitsize */
601 FALSE, /* pc_relative */
602 12, /* bitpos */
603 complain_overflow_dont,/* complain_on_overflow */
604 bfd_elf_generic_reloc, /* special_function */
605 "R_ARM_ALU_SBREL_19_12",/* name */
606 FALSE, /* partial_inplace */
607 0x000ff000, /* src_mask */
608 0x000ff000, /* dst_mask */
609 FALSE), /* pcrel_offset */
610
611 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
612 0, /* rightshift */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
614 8, /* bitsize */
615 FALSE, /* pc_relative */
616 20, /* bitpos */
617 complain_overflow_dont,/* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_ARM_ALU_SBREL_27_20",/* name */
620 FALSE, /* partial_inplace */
621 0x0ff00000, /* src_mask */
622 0x0ff00000, /* dst_mask */
623 FALSE), /* pcrel_offset */
624
625 HOWTO (R_ARM_TARGET1, /* type */
626 0, /* rightshift */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
628 32, /* bitsize */
629 FALSE, /* pc_relative */
630 0, /* bitpos */
631 complain_overflow_dont,/* complain_on_overflow */
632 bfd_elf_generic_reloc, /* special_function */
633 "R_ARM_TARGET1", /* name */
634 FALSE, /* partial_inplace */
635 0xffffffff, /* src_mask */
636 0xffffffff, /* dst_mask */
637 FALSE), /* pcrel_offset */
638
639 HOWTO (R_ARM_ROSEGREL32, /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 32, /* bitsize */
643 FALSE, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_dont,/* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 "R_ARM_ROSEGREL32", /* name */
648 FALSE, /* partial_inplace */
649 0xffffffff, /* src_mask */
650 0xffffffff, /* dst_mask */
651 FALSE), /* pcrel_offset */
652
653 HOWTO (R_ARM_V4BX, /* type */
654 0, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 32, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont,/* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_ARM_V4BX", /* name */
662 FALSE, /* partial_inplace */
663 0xffffffff, /* src_mask */
664 0xffffffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 HOWTO (R_ARM_TARGET2, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_signed,/* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_ARM_TARGET2", /* name */
676 FALSE, /* partial_inplace */
677 0xffffffff, /* src_mask */
678 0xffffffff, /* dst_mask */
679 TRUE), /* pcrel_offset */
680
681 HOWTO (R_ARM_PREL31, /* type */
682 0, /* rightshift */
683 2, /* size (0 = byte, 1 = short, 2 = long) */
684 31, /* bitsize */
685 TRUE, /* pc_relative */
686 0, /* bitpos */
687 complain_overflow_signed,/* complain_on_overflow */
688 bfd_elf_generic_reloc, /* special_function */
689 "R_ARM_PREL31", /* name */
690 FALSE, /* partial_inplace */
691 0x7fffffff, /* src_mask */
692 0x7fffffff, /* dst_mask */
693 TRUE), /* pcrel_offset */
c19d1205
ZW		 694
695 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
696 0, /* rightshift */
697 2, /* size (0 = byte, 1 = short, 2 = long) */
698 16, /* bitsize */
699 FALSE, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_dont,/* complain_on_overflow */
702 bfd_elf_generic_reloc, /* special_function */
703 "R_ARM_MOVW_ABS_NC", /* name */
704 FALSE, /* partial_inplace */
39623e12
PB		 705 0x000f0fff, /* src_mask */
706 0x000f0fff, /* dst_mask */
c19d1205
ZW		 707 FALSE), /* pcrel_offset */
708
709 HOWTO (R_ARM_MOVT_ABS, /* type */
710 0, /* rightshift */
711 2, /* size (0 = byte, 1 = short, 2 = long) */
712 16, /* bitsize */
713 FALSE, /* pc_relative */
714 0, /* bitpos */
715 complain_overflow_bitfield,/* complain_on_overflow */
716 bfd_elf_generic_reloc, /* special_function */
717 "R_ARM_MOVT_ABS", /* name */
718 FALSE, /* partial_inplace */
39623e12
PB		 719 0x000f0fff, /* src_mask */
720 0x000f0fff, /* dst_mask */
c19d1205
ZW		 721 FALSE), /* pcrel_offset */
722
723 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
724 0, /* rightshift */
725 2, /* size (0 = byte, 1 = short, 2 = long) */
726 16, /* bitsize */
727 TRUE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_dont,/* complain_on_overflow */
730 bfd_elf_generic_reloc, /* special_function */
731 "R_ARM_MOVW_PREL_NC", /* name */
732 FALSE, /* partial_inplace */
39623e12
PB		 733 0x000f0fff, /* src_mask */
734 0x000f0fff, /* dst_mask */
c19d1205
ZW		 735 TRUE), /* pcrel_offset */
736
737 HOWTO (R_ARM_MOVT_PREL, /* type */
738 0, /* rightshift */
739 2, /* size (0 = byte, 1 = short, 2 = long) */
740 16, /* bitsize */
741 TRUE, /* pc_relative */
742 0, /* bitpos */
743 complain_overflow_bitfield,/* complain_on_overflow */
744 bfd_elf_generic_reloc, /* special_function */
745 "R_ARM_MOVT_PREL", /* name */
746 FALSE, /* partial_inplace */
39623e12
PB		 747 0x000f0fff, /* src_mask */
748 0x000f0fff, /* dst_mask */
c19d1205
ZW		 749 TRUE), /* pcrel_offset */
750
751 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
752 0, /* rightshift */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont,/* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_ARM_THM_MOVW_ABS_NC",/* name */
760 FALSE, /* partial_inplace */
761 0x040f70ff, /* src_mask */
762 0x040f70ff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 16, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_bitfield,/* complain_on_overflow */
772 bfd_elf_generic_reloc, /* special_function */
773 "R_ARM_THM_MOVT_ABS", /* name */
774 FALSE, /* partial_inplace */
775 0x040f70ff, /* src_mask */
776 0x040f70ff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 16, /* bitsize */
783 TRUE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont,/* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_ARM_THM_MOVW_PREL_NC",/* name */
788 FALSE, /* partial_inplace */
789 0x040f70ff, /* src_mask */
790 0x040f70ff, /* dst_mask */
791 TRUE), /* pcrel_offset */
792
793 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 16, /* bitsize */
797 TRUE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_bitfield,/* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_ARM_THM_MOVT_PREL", /* name */
802 FALSE, /* partial_inplace */
803 0x040f70ff, /* src_mask */
804 0x040f70ff, /* dst_mask */
805 TRUE), /* pcrel_offset */
806
807 HOWTO (R_ARM_THM_JUMP19, /* type */
808 1, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 19, /* bitsize */
811 TRUE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_signed,/* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_ARM_THM_JUMP19", /* name */
816 FALSE, /* partial_inplace */
817 0x043f2fff, /* src_mask */
818 0x043f2fff, /* dst_mask */
819 TRUE), /* pcrel_offset */
820
821 HOWTO (R_ARM_THM_JUMP6, /* type */
822 1, /* rightshift */
823 1, /* size (0 = byte, 1 = short, 2 = long) */
824 6, /* bitsize */
825 TRUE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_unsigned,/* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_ARM_THM_JUMP6", /* name */
830 FALSE, /* partial_inplace */
831 0x02f8, /* src_mask */
832 0x02f8, /* dst_mask */
833 TRUE), /* pcrel_offset */
834
835 /* These are declared as 13-bit signed relocations because we can
836 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
837 versa. */
838 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
839 0, /* rightshift */
840 2, /* size (0 = byte, 1 = short, 2 = long) */
841 13, /* bitsize */
842 TRUE, /* pc_relative */
843 0, /* bitpos */
2cab6cc3 844 complain_overflow_dont,/* complain_on_overflow */
c19d1205
ZW		 845 bfd_elf_generic_reloc, /* special_function */
846 "R_ARM_THM_ALU_PREL_11_0",/* name */
847 FALSE, /* partial_inplace */
2cab6cc3
MS		 848 0xffffffff, /* src_mask */
849 0xffffffff, /* dst_mask */
c19d1205
ZW		 850 TRUE), /* pcrel_offset */
851
852 HOWTO (R_ARM_THM_PC12, /* type */
853 0, /* rightshift */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
855 13, /* bitsize */
856 TRUE, /* pc_relative */
857 0, /* bitpos */
2cab6cc3 858 complain_overflow_dont,/* complain_on_overflow */
c19d1205
ZW		 859 bfd_elf_generic_reloc, /* special_function */
860 "R_ARM_THM_PC12", /* name */
861 FALSE, /* partial_inplace */
2cab6cc3
MS		 862 0xffffffff, /* src_mask */
863 0xffffffff, /* dst_mask */
c19d1205
ZW		 864 TRUE), /* pcrel_offset */
865
866 HOWTO (R_ARM_ABS32_NOI, /* type */
867 0, /* rightshift */
868 2, /* size (0 = byte, 1 = short, 2 = long) */
869 32, /* bitsize */
870 FALSE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont,/* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_ARM_ABS32_NOI", /* name */
875 FALSE, /* partial_inplace */
876 0xffffffff, /* src_mask */
877 0xffffffff, /* dst_mask */
878 FALSE), /* pcrel_offset */
879
880 HOWTO (R_ARM_REL32_NOI, /* type */
881 0, /* rightshift */
882 2, /* size (0 = byte, 1 = short, 2 = long) */
883 32, /* bitsize */
884 TRUE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont,/* complain_on_overflow */
887 bfd_elf_generic_reloc, /* special_function */
888 "R_ARM_REL32_NOI", /* name */
889 FALSE, /* partial_inplace */
890 0xffffffff, /* src_mask */
891 0xffffffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
7f266840 893
4962c51a
MS		 894 /* Group relocations. */
895
896 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
897 0, /* rightshift */
898 2, /* size (0 = byte, 1 = short, 2 = long) */
899 32, /* bitsize */
900 TRUE, /* pc_relative */
901 0, /* bitpos */
902 complain_overflow_dont,/* complain_on_overflow */
903 bfd_elf_generic_reloc, /* special_function */
904 "R_ARM_ALU_PC_G0_NC", /* name */
905 FALSE, /* partial_inplace */
906 0xffffffff, /* src_mask */
907 0xffffffff, /* dst_mask */
908 TRUE), /* pcrel_offset */
909
07d6d2b8 910 HOWTO (R_ARM_ALU_PC_G0, /* type */
4962c51a
MS		 911 0, /* rightshift */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
913 32, /* bitsize */
914 TRUE, /* pc_relative */
915 0, /* bitpos */
916 complain_overflow_dont,/* complain_on_overflow */
917 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 918 "R_ARM_ALU_PC_G0", /* name */
4962c51a
MS		 919 FALSE, /* partial_inplace */
920 0xffffffff, /* src_mask */
921 0xffffffff, /* dst_mask */
922 TRUE), /* pcrel_offset */
923
924 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
925 0, /* rightshift */
926 2, /* size (0 = byte, 1 = short, 2 = long) */
927 32, /* bitsize */
928 TRUE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont,/* complain_on_overflow */
931 bfd_elf_generic_reloc, /* special_function */
932 "R_ARM_ALU_PC_G1_NC", /* name */
933 FALSE, /* partial_inplace */
934 0xffffffff, /* src_mask */
935 0xffffffff, /* dst_mask */
936 TRUE), /* pcrel_offset */
937
07d6d2b8 938 HOWTO (R_ARM_ALU_PC_G1, /* type */
4962c51a
MS		 939 0, /* rightshift */
940 2, /* size (0 = byte, 1 = short, 2 = long) */
941 32, /* bitsize */
942 TRUE, /* pc_relative */
943 0, /* bitpos */
944 complain_overflow_dont,/* complain_on_overflow */
945 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 946 "R_ARM_ALU_PC_G1", /* name */
4962c51a
MS		 947 FALSE, /* partial_inplace */
948 0xffffffff, /* src_mask */
949 0xffffffff, /* dst_mask */
950 TRUE), /* pcrel_offset */
951
07d6d2b8 952 HOWTO (R_ARM_ALU_PC_G2, /* type */
4962c51a
MS		 953 0, /* rightshift */
954 2, /* size (0 = byte, 1 = short, 2 = long) */
955 32, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont,/* complain_on_overflow */
959 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 960 "R_ARM_ALU_PC_G2", /* name */
4962c51a
MS		 961 FALSE, /* partial_inplace */
962 0xffffffff, /* src_mask */
963 0xffffffff, /* dst_mask */
964 TRUE), /* pcrel_offset */
965
07d6d2b8 966 HOWTO (R_ARM_LDR_PC_G1, /* type */
4962c51a
MS		 967 0, /* rightshift */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
969 32, /* bitsize */
970 TRUE, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_dont,/* complain_on_overflow */
973 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 974 "R_ARM_LDR_PC_G1", /* name */
4962c51a
MS		 975 FALSE, /* partial_inplace */
976 0xffffffff, /* src_mask */
977 0xffffffff, /* dst_mask */
978 TRUE), /* pcrel_offset */
979
07d6d2b8 980 HOWTO (R_ARM_LDR_PC_G2, /* type */
4962c51a
MS		 981 0, /* rightshift */
982 2, /* size (0 = byte, 1 = short, 2 = long) */
983 32, /* bitsize */
984 TRUE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont,/* complain_on_overflow */
987 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 988 "R_ARM_LDR_PC_G2", /* name */
4962c51a
MS		 989 FALSE, /* partial_inplace */
990 0xffffffff, /* src_mask */
991 0xffffffff, /* dst_mask */
992 TRUE), /* pcrel_offset */
993
07d6d2b8 994 HOWTO (R_ARM_LDRS_PC_G0, /* type */
4962c51a
MS		 995 0, /* rightshift */
996 2, /* size (0 = byte, 1 = short, 2 = long) */
997 32, /* bitsize */
998 TRUE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_dont,/* complain_on_overflow */
1001 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1002 "R_ARM_LDRS_PC_G0", /* name */
4962c51a
MS		 1003 FALSE, /* partial_inplace */
1004 0xffffffff, /* src_mask */
1005 0xffffffff, /* dst_mask */
1006 TRUE), /* pcrel_offset */
1007
07d6d2b8 1008 HOWTO (R_ARM_LDRS_PC_G1, /* type */
4962c51a
MS		 1009 0, /* rightshift */
1010 2, /* size (0 = byte, 1 = short, 2 = long) */
1011 32, /* bitsize */
1012 TRUE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_dont,/* complain_on_overflow */
1015 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1016 "R_ARM_LDRS_PC_G1", /* name */
4962c51a
MS		 1017 FALSE, /* partial_inplace */
1018 0xffffffff, /* src_mask */
1019 0xffffffff, /* dst_mask */
1020 TRUE), /* pcrel_offset */
1021
07d6d2b8 1022 HOWTO (R_ARM_LDRS_PC_G2, /* type */
4962c51a
MS		 1023 0, /* rightshift */
1024 2, /* size (0 = byte, 1 = short, 2 = long) */
1025 32, /* bitsize */
1026 TRUE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_dont,/* complain_on_overflow */
1029 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1030 "R_ARM_LDRS_PC_G2", /* name */
4962c51a
MS		 1031 FALSE, /* partial_inplace */
1032 0xffffffff, /* src_mask */
1033 0xffffffff, /* dst_mask */
1034 TRUE), /* pcrel_offset */
1035
07d6d2b8 1036 HOWTO (R_ARM_LDC_PC_G0, /* type */
4962c51a
MS		 1037 0, /* rightshift */
1038 2, /* size (0 = byte, 1 = short, 2 = long) */
1039 32, /* bitsize */
1040 TRUE, /* pc_relative */
1041 0, /* bitpos */
1042 complain_overflow_dont,/* complain_on_overflow */
1043 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1044 "R_ARM_LDC_PC_G0", /* name */
4962c51a
MS		 1045 FALSE, /* partial_inplace */
1046 0xffffffff, /* src_mask */
1047 0xffffffff, /* dst_mask */
1048 TRUE), /* pcrel_offset */
1049
07d6d2b8 1050 HOWTO (R_ARM_LDC_PC_G1, /* type */
4962c51a
MS		 1051 0, /* rightshift */
1052 2, /* size (0 = byte, 1 = short, 2 = long) */
1053 32, /* bitsize */
1054 TRUE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_dont,/* complain_on_overflow */
1057 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1058 "R_ARM_LDC_PC_G1", /* name */
4962c51a
MS		 1059 FALSE, /* partial_inplace */
1060 0xffffffff, /* src_mask */
1061 0xffffffff, /* dst_mask */
1062 TRUE), /* pcrel_offset */
1063
07d6d2b8 1064 HOWTO (R_ARM_LDC_PC_G2, /* type */
4962c51a
MS		 1065 0, /* rightshift */
1066 2, /* size (0 = byte, 1 = short, 2 = long) */
1067 32, /* bitsize */
1068 TRUE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_dont,/* complain_on_overflow */
1071 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1072 "R_ARM_LDC_PC_G2", /* name */
4962c51a
MS		 1073 FALSE, /* partial_inplace */
1074 0xffffffff, /* src_mask */
1075 0xffffffff, /* dst_mask */
1076 TRUE), /* pcrel_offset */
1077
07d6d2b8 1078 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
4962c51a
MS		 1079 0, /* rightshift */
1080 2, /* size (0 = byte, 1 = short, 2 = long) */
1081 32, /* bitsize */
1082 TRUE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont,/* complain_on_overflow */
1085 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1086 "R_ARM_ALU_SB_G0_NC", /* name */
4962c51a
MS		 1087 FALSE, /* partial_inplace */
1088 0xffffffff, /* src_mask */
1089 0xffffffff, /* dst_mask */
1090 TRUE), /* pcrel_offset */
1091
07d6d2b8 1092 HOWTO (R_ARM_ALU_SB_G0, /* type */
4962c51a
MS		 1093 0, /* rightshift */
1094 2, /* size (0 = byte, 1 = short, 2 = long) */
1095 32, /* bitsize */
1096 TRUE, /* pc_relative */
1097 0, /* bitpos */
1098 complain_overflow_dont,/* complain_on_overflow */
1099 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1100 "R_ARM_ALU_SB_G0", /* name */
4962c51a
MS		 1101 FALSE, /* partial_inplace */
1102 0xffffffff, /* src_mask */
1103 0xffffffff, /* dst_mask */
1104 TRUE), /* pcrel_offset */
1105
07d6d2b8 1106 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
4962c51a
MS		 1107 0, /* rightshift */
1108 2, /* size (0 = byte, 1 = short, 2 = long) */
1109 32, /* bitsize */
1110 TRUE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_dont,/* complain_on_overflow */
1113 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1114 "R_ARM_ALU_SB_G1_NC", /* name */
4962c51a
MS		 1115 FALSE, /* partial_inplace */
1116 0xffffffff, /* src_mask */
1117 0xffffffff, /* dst_mask */
1118 TRUE), /* pcrel_offset */
1119
07d6d2b8 1120 HOWTO (R_ARM_ALU_SB_G1, /* type */
4962c51a
MS		 1121 0, /* rightshift */
1122 2, /* size (0 = byte, 1 = short, 2 = long) */
1123 32, /* bitsize */
1124 TRUE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_dont,/* complain_on_overflow */
1127 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1128 "R_ARM_ALU_SB_G1", /* name */
4962c51a
MS		 1129 FALSE, /* partial_inplace */
1130 0xffffffff, /* src_mask */
1131 0xffffffff, /* dst_mask */
1132 TRUE), /* pcrel_offset */
1133
07d6d2b8 1134 HOWTO (R_ARM_ALU_SB_G2, /* type */
4962c51a
MS		 1135 0, /* rightshift */
1136 2, /* size (0 = byte, 1 = short, 2 = long) */
1137 32, /* bitsize */
1138 TRUE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont,/* complain_on_overflow */
1141 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1142 "R_ARM_ALU_SB_G2", /* name */
4962c51a
MS		 1143 FALSE, /* partial_inplace */
1144 0xffffffff, /* src_mask */
1145 0xffffffff, /* dst_mask */
1146 TRUE), /* pcrel_offset */
1147
07d6d2b8 1148 HOWTO (R_ARM_LDR_SB_G0, /* type */
4962c51a
MS		 1149 0, /* rightshift */
1150 2, /* size (0 = byte, 1 = short, 2 = long) */
1151 32, /* bitsize */
1152 TRUE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_dont,/* complain_on_overflow */
1155 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1156 "R_ARM_LDR_SB_G0", /* name */
4962c51a
MS		 1157 FALSE, /* partial_inplace */
1158 0xffffffff, /* src_mask */
1159 0xffffffff, /* dst_mask */
1160 TRUE), /* pcrel_offset */
1161
07d6d2b8 1162 HOWTO (R_ARM_LDR_SB_G1, /* type */
4962c51a
MS		 1163 0, /* rightshift */
1164 2, /* size (0 = byte, 1 = short, 2 = long) */
1165 32, /* bitsize */
1166 TRUE, /* pc_relative */
1167 0, /* bitpos */
1168 complain_overflow_dont,/* complain_on_overflow */
1169 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1170 "R_ARM_LDR_SB_G1", /* name */
4962c51a
MS		 1171 FALSE, /* partial_inplace */
1172 0xffffffff, /* src_mask */
1173 0xffffffff, /* dst_mask */
1174 TRUE), /* pcrel_offset */
1175
07d6d2b8 1176 HOWTO (R_ARM_LDR_SB_G2, /* type */
4962c51a
MS		 1177 0, /* rightshift */
1178 2, /* size (0 = byte, 1 = short, 2 = long) */
1179 32, /* bitsize */
1180 TRUE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_dont,/* complain_on_overflow */
1183 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1184 "R_ARM_LDR_SB_G2", /* name */
4962c51a
MS		 1185 FALSE, /* partial_inplace */
1186 0xffffffff, /* src_mask */
1187 0xffffffff, /* dst_mask */
1188 TRUE), /* pcrel_offset */
1189
07d6d2b8 1190 HOWTO (R_ARM_LDRS_SB_G0, /* type */
4962c51a
MS		 1191 0, /* rightshift */
1192 2, /* size (0 = byte, 1 = short, 2 = long) */
1193 32, /* bitsize */
1194 TRUE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont,/* complain_on_overflow */
1197 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1198 "R_ARM_LDRS_SB_G0", /* name */
4962c51a
MS		 1199 FALSE, /* partial_inplace */
1200 0xffffffff, /* src_mask */
1201 0xffffffff, /* dst_mask */
1202 TRUE), /* pcrel_offset */
1203
07d6d2b8 1204 HOWTO (R_ARM_LDRS_SB_G1, /* type */
4962c51a
MS		 1205 0, /* rightshift */
1206 2, /* size (0 = byte, 1 = short, 2 = long) */
1207 32, /* bitsize */
1208 TRUE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_dont,/* complain_on_overflow */
1211 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1212 "R_ARM_LDRS_SB_G1", /* name */
4962c51a
MS		 1213 FALSE, /* partial_inplace */
1214 0xffffffff, /* src_mask */
1215 0xffffffff, /* dst_mask */
1216 TRUE), /* pcrel_offset */
1217
07d6d2b8 1218 HOWTO (R_ARM_LDRS_SB_G2, /* type */
4962c51a
MS		 1219 0, /* rightshift */
1220 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 32, /* bitsize */
1222 TRUE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_dont,/* complain_on_overflow */
1225 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1226 "R_ARM_LDRS_SB_G2", /* name */
4962c51a
MS		 1227 FALSE, /* partial_inplace */
1228 0xffffffff, /* src_mask */
1229 0xffffffff, /* dst_mask */
1230 TRUE), /* pcrel_offset */
1231
07d6d2b8 1232 HOWTO (R_ARM_LDC_SB_G0, /* type */
4962c51a
MS		 1233 0, /* rightshift */
1234 2, /* size (0 = byte, 1 = short, 2 = long) */
1235 32, /* bitsize */
1236 TRUE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_dont,/* complain_on_overflow */
1239 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1240 "R_ARM_LDC_SB_G0", /* name */
4962c51a
MS		 1241 FALSE, /* partial_inplace */
1242 0xffffffff, /* src_mask */
1243 0xffffffff, /* dst_mask */
1244 TRUE), /* pcrel_offset */
1245
07d6d2b8 1246 HOWTO (R_ARM_LDC_SB_G1, /* type */
4962c51a
MS		 1247 0, /* rightshift */
1248 2, /* size (0 = byte, 1 = short, 2 = long) */
1249 32, /* bitsize */
1250 TRUE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont,/* complain_on_overflow */
1253 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1254 "R_ARM_LDC_SB_G1", /* name */
4962c51a
MS		 1255 FALSE, /* partial_inplace */
1256 0xffffffff, /* src_mask */
1257 0xffffffff, /* dst_mask */
1258 TRUE), /* pcrel_offset */
1259
07d6d2b8 1260 HOWTO (R_ARM_LDC_SB_G2, /* type */
4962c51a
MS		 1261 0, /* rightshift */
1262 2, /* size (0 = byte, 1 = short, 2 = long) */
1263 32, /* bitsize */
1264 TRUE, /* pc_relative */
1265 0, /* bitpos */
1266 complain_overflow_dont,/* complain_on_overflow */
1267 bfd_elf_generic_reloc, /* special_function */
07d6d2b8 1268 "R_ARM_LDC_SB_G2", /* name */
4962c51a
MS		 1269 FALSE, /* partial_inplace */
1270 0xffffffff, /* src_mask */
1271 0xffffffff, /* dst_mask */
1272 TRUE), /* pcrel_offset */
1273
1274 /* End of group relocations. */
c19d1205 1275
c19d1205
ZW		 1276 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1277 0, /* rightshift */
1278 2, /* size (0 = byte, 1 = short, 2 = long) */
1279 16, /* bitsize */
1280 FALSE, /* pc_relative */
1281 0, /* bitpos */
1282 complain_overflow_dont,/* complain_on_overflow */
1283 bfd_elf_generic_reloc, /* special_function */
1284 "R_ARM_MOVW_BREL_NC", /* name */
1285 FALSE, /* partial_inplace */
1286 0x0000ffff, /* src_mask */
1287 0x0000ffff, /* dst_mask */
1288 FALSE), /* pcrel_offset */
1289
1290 HOWTO (R_ARM_MOVT_BREL, /* type */
1291 0, /* rightshift */
1292 2, /* size (0 = byte, 1 = short, 2 = long) */
1293 16, /* bitsize */
1294 FALSE, /* pc_relative */
1295 0, /* bitpos */
1296 complain_overflow_bitfield,/* complain_on_overflow */
1297 bfd_elf_generic_reloc, /* special_function */
1298 "R_ARM_MOVT_BREL", /* name */
1299 FALSE, /* partial_inplace */
1300 0x0000ffff, /* src_mask */
1301 0x0000ffff, /* dst_mask */
1302 FALSE), /* pcrel_offset */
1303
1304 HOWTO (R_ARM_MOVW_BREL, /* type */
1305 0, /* rightshift */
1306 2, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont,/* complain_on_overflow */
1311 bfd_elf_generic_reloc, /* special_function */
1312 "R_ARM_MOVW_BREL", /* name */
1313 FALSE, /* partial_inplace */
1314 0x0000ffff, /* src_mask */
1315 0x0000ffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1319 0, /* rightshift */
1320 2, /* size (0 = byte, 1 = short, 2 = long) */
1321 16, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_dont,/* complain_on_overflow */
1325 bfd_elf_generic_reloc, /* special_function */
1326 "R_ARM_THM_MOVW_BREL_NC",/* name */
1327 FALSE, /* partial_inplace */
1328 0x040f70ff, /* src_mask */
1329 0x040f70ff, /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1333 0, /* rightshift */
1334 2, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_bitfield,/* complain_on_overflow */
1339 bfd_elf_generic_reloc, /* special_function */
1340 "R_ARM_THM_MOVT_BREL", /* name */
1341 FALSE, /* partial_inplace */
1342 0x040f70ff, /* src_mask */
1343 0x040f70ff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1347 0, /* rightshift */
1348 2, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont,/* complain_on_overflow */
1353 bfd_elf_generic_reloc, /* special_function */
1354 "R_ARM_THM_MOVW_BREL", /* name */
1355 FALSE, /* partial_inplace */
1356 0x040f70ff, /* src_mask */
1357 0x040f70ff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
0855e32b
NS		 1360 HOWTO (R_ARM_TLS_GOTDESC, /* type */
1361 0, /* rightshift */
1362 2, /* size (0 = byte, 1 = short, 2 = long) */
1363 32, /* bitsize */
1364 FALSE, /* pc_relative */
1365 0, /* bitpos */
1366 complain_overflow_bitfield,/* complain_on_overflow */
1367 NULL, /* special_function */
1368 "R_ARM_TLS_GOTDESC", /* name */
1369 TRUE, /* partial_inplace */
1370 0xffffffff, /* src_mask */
1371 0xffffffff, /* dst_mask */
1372 FALSE), /* pcrel_offset */
1373
1374 HOWTO (R_ARM_TLS_CALL, /* type */
1375 0, /* rightshift */
1376 2, /* size (0 = byte, 1 = short, 2 = long) */
1377 24, /* bitsize */
1378 FALSE, /* pc_relative */
1379 0, /* bitpos */
1380 complain_overflow_dont,/* complain_on_overflow */
1381 bfd_elf_generic_reloc, /* special_function */
1382 "R_ARM_TLS_CALL", /* name */
1383 FALSE, /* partial_inplace */
1384 0x00ffffff, /* src_mask */
1385 0x00ffffff, /* dst_mask */
1386 FALSE), /* pcrel_offset */
1387
1388 HOWTO (R_ARM_TLS_DESCSEQ, /* type */
1389 0, /* rightshift */
1390 2, /* size (0 = byte, 1 = short, 2 = long) */
1391 0, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_bitfield,/* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_ARM_TLS_DESCSEQ", /* name */
1397 FALSE, /* partial_inplace */
1398 0x00000000, /* src_mask */
1399 0x00000000, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 HOWTO (R_ARM_THM_TLS_CALL, /* type */
1403 0, /* rightshift */
1404 2, /* size (0 = byte, 1 = short, 2 = long) */
1405 24, /* bitsize */
1406 FALSE, /* pc_relative */
1407 0, /* bitpos */
1408 complain_overflow_dont,/* complain_on_overflow */
1409 bfd_elf_generic_reloc, /* special_function */
1410 "R_ARM_THM_TLS_CALL", /* name */
1411 FALSE, /* partial_inplace */
1412 0x07ff07ff, /* src_mask */
1413 0x07ff07ff, /* dst_mask */
1414 FALSE), /* pcrel_offset */
c19d1205
ZW		 1415
1416 HOWTO (R_ARM_PLT32_ABS, /* type */
1417 0, /* rightshift */
1418 2, /* size (0 = byte, 1 = short, 2 = long) */
1419 32, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont,/* complain_on_overflow */
1423 bfd_elf_generic_reloc, /* special_function */
1424 "R_ARM_PLT32_ABS", /* name */
1425 FALSE, /* partial_inplace */
1426 0xffffffff, /* src_mask */
1427 0xffffffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 HOWTO (R_ARM_GOT_ABS, /* type */
1431 0, /* rightshift */
1432 2, /* size (0 = byte, 1 = short, 2 = long) */
1433 32, /* bitsize */
1434 FALSE, /* pc_relative */
1435 0, /* bitpos */
1436 complain_overflow_dont,/* complain_on_overflow */
1437 bfd_elf_generic_reloc, /* special_function */
1438 "R_ARM_GOT_ABS", /* name */
1439 FALSE, /* partial_inplace */
1440 0xffffffff, /* src_mask */
1441 0xffffffff, /* dst_mask */
1442 FALSE), /* pcrel_offset */
1443
1444 HOWTO (R_ARM_GOT_PREL, /* type */
1445 0, /* rightshift */
1446 2, /* size (0 = byte, 1 = short, 2 = long) */
1447 32, /* bitsize */
1448 TRUE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 bfd_elf_generic_reloc, /* special_function */
1452 "R_ARM_GOT_PREL", /* name */
1453 FALSE, /* partial_inplace */
1454 0xffffffff, /* src_mask */
1455 0xffffffff, /* dst_mask */
1456 TRUE), /* pcrel_offset */
1457
1458 HOWTO (R_ARM_GOT_BREL12, /* type */
1459 0, /* rightshift */
1460 2, /* size (0 = byte, 1 = short, 2 = long) */
1461 12, /* bitsize */
1462 FALSE, /* pc_relative */
1463 0, /* bitpos */
1464 complain_overflow_bitfield,/* complain_on_overflow */
1465 bfd_elf_generic_reloc, /* special_function */
1466 "R_ARM_GOT_BREL12", /* name */
1467 FALSE, /* partial_inplace */
1468 0x00000fff, /* src_mask */
1469 0x00000fff, /* dst_mask */
1470 FALSE), /* pcrel_offset */
1471
1472 HOWTO (R_ARM_GOTOFF12, /* type */
1473 0, /* rightshift */
1474 2, /* size (0 = byte, 1 = short, 2 = long) */
1475 12, /* bitsize */
1476 FALSE, /* pc_relative */
1477 0, /* bitpos */
1478 complain_overflow_bitfield,/* complain_on_overflow */
1479 bfd_elf_generic_reloc, /* special_function */
1480 "R_ARM_GOTOFF12", /* name */
1481 FALSE, /* partial_inplace */
1482 0x00000fff, /* src_mask */
1483 0x00000fff, /* dst_mask */
1484 FALSE), /* pcrel_offset */
1485
07d6d2b8 1486 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
c19d1205
ZW		 1487
1488 /* GNU extension to record C++ vtable member usage */
07d6d2b8
AM		 1489 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1490 0, /* rightshift */
1491 2, /* size (0 = byte, 1 = short, 2 = long) */
1492 0, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
99059e56 1495 complain_overflow_dont, /* complain_on_overflow */
07d6d2b8
AM		 1496 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1497 "R_ARM_GNU_VTENTRY", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0, /* dst_mask */
1501 FALSE), /* pcrel_offset */
c19d1205
ZW		 1502
1503 /* GNU extension to record C++ vtable hierarchy */
1504 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
07d6d2b8
AM		 1505 0, /* rightshift */
1506 2, /* size (0 = byte, 1 = short, 2 = long) */
1507 0, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
99059e56 1510 complain_overflow_dont, /* complain_on_overflow */
07d6d2b8 1511 NULL, /* special_function */
99059e56 1512 "R_ARM_GNU_VTINHERIT", /* name */
07d6d2b8
AM		 1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0, /* dst_mask */
1516 FALSE), /* pcrel_offset */
c19d1205
ZW		 1517
1518 HOWTO (R_ARM_THM_JUMP11, /* type */
1519 1, /* rightshift */
1520 1, /* size (0 = byte, 1 = short, 2 = long) */
1521 11, /* bitsize */
1522 TRUE, /* pc_relative */
1523 0, /* bitpos */
1524 complain_overflow_signed, /* complain_on_overflow */
1525 bfd_elf_generic_reloc, /* special_function */
1526 "R_ARM_THM_JUMP11", /* name */
1527 FALSE, /* partial_inplace */
1528 0x000007ff, /* src_mask */
1529 0x000007ff, /* dst_mask */
1530 TRUE), /* pcrel_offset */
1531
1532 HOWTO (R_ARM_THM_JUMP8, /* type */
1533 1, /* rightshift */
1534 1, /* size (0 = byte, 1 = short, 2 = long) */
1535 8, /* bitsize */
1536 TRUE, /* pc_relative */
1537 0, /* bitpos */
1538 complain_overflow_signed, /* complain_on_overflow */
1539 bfd_elf_generic_reloc, /* special_function */
1540 "R_ARM_THM_JUMP8", /* name */
1541 FALSE, /* partial_inplace */
1542 0x000000ff, /* src_mask */
1543 0x000000ff, /* dst_mask */
1544 TRUE), /* pcrel_offset */
ba93b8ac 1545
c19d1205
ZW		 1546 /* TLS relocations */
1547 HOWTO (R_ARM_TLS_GD32, /* type */
07d6d2b8
AM		 1548 0, /* rightshift */
1549 2, /* size (0 = byte, 1 = short, 2 = long) */
1550 32, /* bitsize */
1551 FALSE, /* pc_relative */
1552 0, /* bitpos */
99059e56
RM		 1553 complain_overflow_bitfield,/* complain_on_overflow */
1554 NULL, /* special_function */
1555 "R_ARM_TLS_GD32", /* name */
1556 TRUE, /* partial_inplace */
1557 0xffffffff, /* src_mask */
1558 0xffffffff, /* dst_mask */
07d6d2b8 1559 FALSE), /* pcrel_offset */
ba93b8ac 1560
ba93b8ac 1561 HOWTO (R_ARM_TLS_LDM32, /* type */
07d6d2b8
AM		 1562 0, /* rightshift */
1563 2, /* size (0 = byte, 1 = short, 2 = long) */
1564 32, /* bitsize */
1565 FALSE, /* pc_relative */
1566 0, /* bitpos */
99059e56
RM		 1567 complain_overflow_bitfield,/* complain_on_overflow */
1568 bfd_elf_generic_reloc, /* special_function */
1569 "R_ARM_TLS_LDM32", /* name */
1570 TRUE, /* partial_inplace */
1571 0xffffffff, /* src_mask */
1572 0xffffffff, /* dst_mask */
07d6d2b8 1573 FALSE), /* pcrel_offset */
ba93b8ac 1574
c19d1205 1575 HOWTO (R_ARM_TLS_LDO32, /* type */
07d6d2b8
AM		 1576 0, /* rightshift */
1577 2, /* size (0 = byte, 1 = short, 2 = long) */
1578 32, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
99059e56
RM		 1581 complain_overflow_bitfield,/* complain_on_overflow */
1582 bfd_elf_generic_reloc, /* special_function */
1583 "R_ARM_TLS_LDO32", /* name */
1584 TRUE, /* partial_inplace */
1585 0xffffffff, /* src_mask */
1586 0xffffffff, /* dst_mask */
07d6d2b8 1587 FALSE), /* pcrel_offset */
ba93b8ac 1588
ba93b8ac 1589 HOWTO (R_ARM_TLS_IE32, /* type */
07d6d2b8
AM		 1590 0, /* rightshift */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 32, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
99059e56
RM		 1595 complain_overflow_bitfield,/* complain_on_overflow */
1596 NULL, /* special_function */
1597 "R_ARM_TLS_IE32", /* name */
1598 TRUE, /* partial_inplace */
1599 0xffffffff, /* src_mask */
1600 0xffffffff, /* dst_mask */
07d6d2b8 1601 FALSE), /* pcrel_offset */
7f266840 1602
c19d1205 1603 HOWTO (R_ARM_TLS_LE32, /* type */
07d6d2b8
AM		 1604 0, /* rightshift */
1605 2, /* size (0 = byte, 1 = short, 2 = long) */
1606 32, /* bitsize */
1607 FALSE, /* pc_relative */
1608 0, /* bitpos */
99059e56 1609 complain_overflow_bitfield,/* complain_on_overflow */
07d6d2b8 1610 NULL, /* special_function */
99059e56
RM		 1611 "R_ARM_TLS_LE32", /* name */
1612 TRUE, /* partial_inplace */
1613 0xffffffff, /* src_mask */
1614 0xffffffff, /* dst_mask */
07d6d2b8 1615 FALSE), /* pcrel_offset */
7f266840 1616
c19d1205
ZW		 1617 HOWTO (R_ARM_TLS_LDO12, /* type */
1618 0, /* rightshift */
1619 2, /* size (0 = byte, 1 = short, 2 = long) */
1620 12, /* bitsize */
1621 FALSE, /* pc_relative */
7f266840 1622 0, /* bitpos */
c19d1205 1623 complain_overflow_bitfield,/* complain_on_overflow */
7f266840 1624 bfd_elf_generic_reloc, /* special_function */
c19d1205 1625 "R_ARM_TLS_LDO12", /* name */
7f266840 1626 FALSE, /* partial_inplace */
c19d1205
ZW		 1627 0x00000fff, /* src_mask */
1628 0x00000fff, /* dst_mask */
1629 FALSE), /* pcrel_offset */
7f266840 1630
c19d1205
ZW		 1631 HOWTO (R_ARM_TLS_LE12, /* type */
1632 0, /* rightshift */
1633 2, /* size (0 = byte, 1 = short, 2 = long) */
1634 12, /* bitsize */
1635 FALSE, /* pc_relative */
7f266840 1636 0, /* bitpos */
c19d1205 1637 complain_overflow_bitfield,/* complain_on_overflow */
7f266840 1638 bfd_elf_generic_reloc, /* special_function */
c19d1205 1639 "R_ARM_TLS_LE12", /* name */
7f266840 1640 FALSE, /* partial_inplace */
c19d1205
ZW		 1641 0x00000fff, /* src_mask */
1642 0x00000fff, /* dst_mask */
1643 FALSE), /* pcrel_offset */
7f266840 1644
c19d1205 1645 HOWTO (R_ARM_TLS_IE12GP, /* type */
7f266840
DJ		 1646 0, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
c19d1205
ZW		 1648 12, /* bitsize */
1649 FALSE, /* pc_relative */
7f266840 1650 0, /* bitpos */
c19d1205 1651 complain_overflow_bitfield,/* complain_on_overflow */
7f266840 1652 bfd_elf_generic_reloc, /* special_function */
c19d1205 1653 "R_ARM_TLS_IE12GP", /* name */
7f266840 1654 FALSE, /* partial_inplace */
c19d1205
ZW		 1655 0x00000fff, /* src_mask */
1656 0x00000fff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
0855e32b 1658
34e77a92 1659 /* 112-127 private relocations. */
0855e32b
NS		 1660 EMPTY_HOWTO (112),
1661 EMPTY_HOWTO (113),
1662 EMPTY_HOWTO (114),
1663 EMPTY_HOWTO (115),
1664 EMPTY_HOWTO (116),
1665 EMPTY_HOWTO (117),
1666 EMPTY_HOWTO (118),
1667 EMPTY_HOWTO (119),
1668 EMPTY_HOWTO (120),
1669 EMPTY_HOWTO (121),
1670 EMPTY_HOWTO (122),
1671 EMPTY_HOWTO (123),
1672 EMPTY_HOWTO (124),
1673 EMPTY_HOWTO (125),
1674 EMPTY_HOWTO (126),
1675 EMPTY_HOWTO (127),
34e77a92
RS		 1676
1677 /* R_ARM_ME_TOO, obsolete. */
0855e32b
NS		 1678 EMPTY_HOWTO (128),
1679
1680 HOWTO (R_ARM_THM_TLS_DESCSEQ, /* type */
1681 0, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 0, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_bitfield,/* complain_on_overflow */
1687 bfd_elf_generic_reloc, /* special_function */
1688 "R_ARM_THM_TLS_DESCSEQ",/* name */
1689 FALSE, /* partial_inplace */
1690 0x00000000, /* src_mask */
1691 0x00000000, /* dst_mask */
1692 FALSE), /* pcrel_offset */
72d98d16
MG		 1693 EMPTY_HOWTO (130),
1694 EMPTY_HOWTO (131),
1695 HOWTO (R_ARM_THM_ALU_ABS_G0_NC,/* type. */
1696 0, /* rightshift. */
1697 1, /* size (0 = byte, 1 = short, 2 = long). */
1698 16, /* bitsize. */
1699 FALSE, /* pc_relative. */
1700 0, /* bitpos. */
1701 complain_overflow_bitfield,/* complain_on_overflow. */
1702 bfd_elf_generic_reloc, /* special_function. */
1703 "R_ARM_THM_ALU_ABS_G0_NC",/* name. */
1704 FALSE, /* partial_inplace. */
1705 0x00000000, /* src_mask. */
1706 0x00000000, /* dst_mask. */
1707 FALSE), /* pcrel_offset. */
1708 HOWTO (R_ARM_THM_ALU_ABS_G1_NC,/* type. */
1709 0, /* rightshift. */
1710 1, /* size (0 = byte, 1 = short, 2 = long). */
1711 16, /* bitsize. */
1712 FALSE, /* pc_relative. */
1713 0, /* bitpos. */
1714 complain_overflow_bitfield,/* complain_on_overflow. */
1715 bfd_elf_generic_reloc, /* special_function. */
1716 "R_ARM_THM_ALU_ABS_G1_NC",/* name. */
1717 FALSE, /* partial_inplace. */
1718 0x00000000, /* src_mask. */
1719 0x00000000, /* dst_mask. */
1720 FALSE), /* pcrel_offset. */
1721 HOWTO (R_ARM_THM_ALU_ABS_G2_NC,/* type. */
1722 0, /* rightshift. */
1723 1, /* size (0 = byte, 1 = short, 2 = long). */
1724 16, /* bitsize. */
1725 FALSE, /* pc_relative. */
1726 0, /* bitpos. */
1727 complain_overflow_bitfield,/* complain_on_overflow. */
1728 bfd_elf_generic_reloc, /* special_function. */
1729 "R_ARM_THM_ALU_ABS_G2_NC",/* name. */
1730 FALSE, /* partial_inplace. */
1731 0x00000000, /* src_mask. */
1732 0x00000000, /* dst_mask. */
1733 FALSE), /* pcrel_offset. */
1734 HOWTO (R_ARM_THM_ALU_ABS_G3_NC,/* type. */
1735 0, /* rightshift. */
1736 1, /* size (0 = byte, 1 = short, 2 = long). */
1737 16, /* bitsize. */
1738 FALSE, /* pc_relative. */
1739 0, /* bitpos. */
1740 complain_overflow_bitfield,/* complain_on_overflow. */
1741 bfd_elf_generic_reloc, /* special_function. */
1742 "R_ARM_THM_ALU_ABS_G3_NC",/* name. */
1743 FALSE, /* partial_inplace. */
1744 0x00000000, /* src_mask. */
1745 0x00000000, /* dst_mask. */
1746 FALSE), /* pcrel_offset. */
e5d6e09e
AV		 1747 /* Relocations for Armv8.1-M Mainline. */
1748 HOWTO (R_ARM_THM_BF16, /* type. */
1749 0, /* rightshift. */
1750 1, /* size (0 = byte, 1 = short, 2 = long). */
1751 16, /* bitsize. */
1752 TRUE, /* pc_relative. */
1753 0, /* bitpos. */
1754 complain_overflow_dont,/* do not complain_on_overflow. */
1755 bfd_elf_generic_reloc, /* special_function. */
1756 "R_ARM_THM_BF16", /* name. */
1757 FALSE, /* partial_inplace. */
1758 0x001f0ffe, /* src_mask. */
1759 0x001f0ffe, /* dst_mask. */
1760 TRUE), /* pcrel_offset. */
1889da70
AV		 1761 HOWTO (R_ARM_THM_BF12, /* type. */
1762 0, /* rightshift. */
1763 1, /* size (0 = byte, 1 = short, 2 = long). */
1764 12, /* bitsize. */
1765 TRUE, /* pc_relative. */
1766 0, /* bitpos. */
1767 complain_overflow_dont,/* do not complain_on_overflow. */
1768 bfd_elf_generic_reloc, /* special_function. */
1769 "R_ARM_THM_BF12", /* name. */
1770 FALSE, /* partial_inplace. */
1771 0x00010ffe, /* src_mask. */
1772 0x00010ffe, /* dst_mask. */
1773 TRUE), /* pcrel_offset. */
1caf72a5
AV		 1774 HOWTO (R_ARM_THM_BF18, /* type. */
1775 0, /* rightshift. */
1776 1, /* size (0 = byte, 1 = short, 2 = long). */
1777 18, /* bitsize. */
1778 TRUE, /* pc_relative. */
1779 0, /* bitpos. */
1780 complain_overflow_dont,/* do not complain_on_overflow. */
1781 bfd_elf_generic_reloc, /* special_function. */
1782 "R_ARM_THM_BF18", /* name. */
1783 FALSE, /* partial_inplace. */
1784 0x007f0ffe, /* src_mask. */
1785 0x007f0ffe, /* dst_mask. */
1786 TRUE), /* pcrel_offset. */
c19d1205
ZW		 1787};
1788
34e77a92 1789/* 160 onwards: */
5c5a4843 1790static reloc_howto_type elf32_arm_howto_table_2[8] =
34e77a92
RS		 1791{
1792 HOWTO (R_ARM_IRELATIVE, /* type */
07d6d2b8
AM		 1793 0, /* rightshift */
1794 2, /* size (0 = byte, 1 = short, 2 = long) */
1795 32, /* bitsize */
1796 FALSE, /* pc_relative */
1797 0, /* bitpos */
99059e56
RM		 1798 complain_overflow_bitfield,/* complain_on_overflow */
1799 bfd_elf_generic_reloc, /* special_function */
1800 "R_ARM_IRELATIVE", /* name */
1801 TRUE, /* partial_inplace */
1802 0xffffffff, /* src_mask */
1803 0xffffffff, /* dst_mask */
188fd7ae
CL		 1804 FALSE), /* pcrel_offset */
1805 HOWTO (R_ARM_GOTFUNCDESC, /* type */
1806 0, /* rightshift */
1807 2, /* size (0 = byte, 1 = short, 2 = long) */
1808 32, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_bitfield,/* complain_on_overflow */
1812 bfd_elf_generic_reloc, /* special_function */
1813 "R_ARM_GOTFUNCDESC", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffffffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818 HOWTO (R_ARM_GOTOFFFUNCDESC, /* type */
1819 0, /* rightshift */
1820 2, /* size (0 = byte, 1 = short, 2 = long) */
1821 32, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_bitfield,/* complain_on_overflow */
1825 bfd_elf_generic_reloc, /* special_function */
1826 "R_ARM_GOTOFFFUNCDESC",/* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xffffffff, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831 HOWTO (R_ARM_FUNCDESC, /* type */
1832 0, /* rightshift */
1833 2, /* size (0 = byte, 1 = short, 2 = long) */
1834 32, /* bitsize */
1835 FALSE, /* pc_relative */
1836 0, /* bitpos */
1837 complain_overflow_bitfield,/* complain_on_overflow */
1838 bfd_elf_generic_reloc, /* special_function */
1839 "R_ARM_FUNCDESC", /* name */
1840 FALSE, /* partial_inplace */
1841 0, /* src_mask */
1842 0xffffffff, /* dst_mask */
1843 FALSE), /* pcrel_offset */
1844 HOWTO (R_ARM_FUNCDESC_VALUE, /* type */
1845 0, /* rightshift */
1846 2, /* size (0 = byte, 1 = short, 2 = long) */
1847 64, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_bitfield,/* complain_on_overflow */
1851 bfd_elf_generic_reloc, /* special_function */
1852 "R_ARM_FUNCDESC_VALUE",/* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffffffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
5c5a4843
CL		 1857 HOWTO (R_ARM_TLS_GD32_FDPIC, /* type */
1858 0, /* rightshift */
1859 2, /* size (0 = byte, 1 = short, 2 = long) */
1860 32, /* bitsize */
1861 FALSE, /* pc_relative */
1862 0, /* bitpos */
1863 complain_overflow_bitfield,/* complain_on_overflow */
1864 bfd_elf_generic_reloc, /* special_function */
1865 "R_ARM_TLS_GD32_FDPIC",/* name */
1866 FALSE, /* partial_inplace */
1867 0, /* src_mask */
1868 0xffffffff, /* dst_mask */
1869 FALSE), /* pcrel_offset */
1870 HOWTO (R_ARM_TLS_LDM32_FDPIC, /* type */
1871 0, /* rightshift */
1872 2, /* size (0 = byte, 1 = short, 2 = long) */
1873 32, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_bitfield,/* complain_on_overflow */
1877 bfd_elf_generic_reloc, /* special_function */
1878 "R_ARM_TLS_LDM32_FDPIC",/* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffffffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883 HOWTO (R_ARM_TLS_IE32_FDPIC, /* type */
1884 0, /* rightshift */
1885 2, /* size (0 = byte, 1 = short, 2 = long) */
1886 32, /* bitsize */
1887 FALSE, /* pc_relative */
1888 0, /* bitpos */
1889 complain_overflow_bitfield,/* complain_on_overflow */
1890 bfd_elf_generic_reloc, /* special_function */
1891 "R_ARM_TLS_IE32_FDPIC",/* name */
1892 FALSE, /* partial_inplace */
1893 0, /* src_mask */
1894 0xffffffff, /* dst_mask */
1895 FALSE), /* pcrel_offset */
34e77a92 1896};
c19d1205 1897
34e77a92
RS		 1898/* 249-255 extended, currently unused, relocations: */
1899static reloc_howto_type elf32_arm_howto_table_3[4] =
7f266840
DJ		 1900{
1901 HOWTO (R_ARM_RREL32, /* type */
1902 0, /* rightshift */
1903 0, /* size (0 = byte, 1 = short, 2 = long) */
1904 0, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont,/* complain_on_overflow */
1908 bfd_elf_generic_reloc, /* special_function */
1909 "R_ARM_RREL32", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 HOWTO (R_ARM_RABS32, /* type */
1916 0, /* rightshift */
1917 0, /* size (0 = byte, 1 = short, 2 = long) */
1918 0, /* bitsize */
1919 FALSE, /* pc_relative */
1920 0, /* bitpos */
1921 complain_overflow_dont,/* complain_on_overflow */
1922 bfd_elf_generic_reloc, /* special_function */
1923 "R_ARM_RABS32", /* name */
1924 FALSE, /* partial_inplace */
1925 0, /* src_mask */
1926 0, /* dst_mask */
1927 FALSE), /* pcrel_offset */
1928
1929 HOWTO (R_ARM_RPC24, /* type */
1930 0, /* rightshift */
1931 0, /* size (0 = byte, 1 = short, 2 = long) */
1932 0, /* bitsize */
1933 FALSE, /* pc_relative */
1934 0, /* bitpos */
1935 complain_overflow_dont,/* complain_on_overflow */
1936 bfd_elf_generic_reloc, /* special_function */
1937 "R_ARM_RPC24", /* name */
1938 FALSE, /* partial_inplace */
1939 0, /* src_mask */
1940 0, /* dst_mask */
1941 FALSE), /* pcrel_offset */
1942
1943 HOWTO (R_ARM_RBASE, /* type */
1944 0, /* rightshift */
1945 0, /* size (0 = byte, 1 = short, 2 = long) */
1946 0, /* bitsize */
1947 FALSE, /* pc_relative */
1948 0, /* bitpos */
1949 complain_overflow_dont,/* complain_on_overflow */
1950 bfd_elf_generic_reloc, /* special_function */
1951 "R_ARM_RBASE", /* name */
1952 FALSE, /* partial_inplace */
1953 0, /* src_mask */
1954 0, /* dst_mask */
1955 FALSE) /* pcrel_offset */
1956};
1957
1958static reloc_howto_type *
1959elf32_arm_howto_from_type (unsigned int r_type)
1960{
906e58ca 1961 if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
c19d1205 1962 return &elf32_arm_howto_table_1[r_type];
ba93b8ac 1963
188fd7ae
CL		 1964 if (r_type >= R_ARM_IRELATIVE
1965 && r_type < R_ARM_IRELATIVE + ARRAY_SIZE (elf32_arm_howto_table_2))
34e77a92
RS		 1966 return &elf32_arm_howto_table_2[r_type - R_ARM_IRELATIVE];
1967
c19d1205 1968 if (r_type >= R_ARM_RREL32
34e77a92
RS		 1969 && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_3))
1970 return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32];
7f266840 1971
c19d1205 1972 return NULL;
7f266840
DJ		 1973}
1974
f3185997
NC		 1975static bfd_boolean
1976elf32_arm_info_to_howto (bfd * abfd, arelent * bfd_reloc,
7f266840
DJ		 1977 Elf_Internal_Rela * elf_reloc)
1978{
1979 unsigned int r_type;
1980
1981 r_type = ELF32_R_TYPE (elf_reloc->r_info);
f3185997
NC		 1982 if ((bfd_reloc->howto = elf32_arm_howto_from_type (r_type)) == NULL)
1983 {
1984 /* xgettext:c-format */
1985 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1986 abfd, r_type);
1987 bfd_set_error (bfd_error_bad_value);
1988 return FALSE;
1989 }
1990 return TRUE;
7f266840
DJ		 1991}
1992
1993struct elf32_arm_reloc_map
1994 {
1995 bfd_reloc_code_real_type bfd_reloc_val;
07d6d2b8 1996 unsigned char elf_reloc_val;
7f266840
DJ		 1997 };
1998
1999/* All entries in this list must also be present in elf32_arm_howto_table. */
2000static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
2001 {
07d6d2b8 2002 {BFD_RELOC_NONE, R_ARM_NONE},
7f266840 2003 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
39b41c9c
PB		 2004 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
2005 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
07d6d2b8
AM		 2006 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
2007 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
2008 {BFD_RELOC_32, R_ARM_ABS32},
2009 {BFD_RELOC_32_PCREL, R_ARM_REL32},
2010 {BFD_RELOC_8, R_ARM_ABS8},
2011 {BFD_RELOC_16, R_ARM_ABS16},
2012 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
7f266840 2013 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
c19d1205
ZW		 2014 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
2015 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
2016 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
2017 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
2018 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
2019 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
07d6d2b8
AM		 2020 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
2021 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
2022 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
2023 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
2024 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
2025 {BFD_RELOC_ARM_GOT_PREL, R_ARM_GOT_PREL},
2026 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
2027 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
7f266840
DJ		 2028 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
2029 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
2030 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
2031 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
ba93b8ac 2032 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
07d6d2b8
AM		 2033 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
2034 {BFD_RELOC_ARM_TLS_GOTDESC, R_ARM_TLS_GOTDESC},
2035 {BFD_RELOC_ARM_TLS_CALL, R_ARM_TLS_CALL},
0855e32b 2036 {BFD_RELOC_ARM_THM_TLS_CALL, R_ARM_THM_TLS_CALL},
07d6d2b8 2037 {BFD_RELOC_ARM_TLS_DESCSEQ, R_ARM_TLS_DESCSEQ},
0855e32b 2038 {BFD_RELOC_ARM_THM_TLS_DESCSEQ, R_ARM_THM_TLS_DESCSEQ},
07d6d2b8 2039 {BFD_RELOC_ARM_TLS_DESC, R_ARM_TLS_DESC},
ba93b8ac
DJ		 2040 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
2041 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
2042 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
2043 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
2044 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
07d6d2b8
AM		 2045 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
2046 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
2047 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
2048 {BFD_RELOC_ARM_IRELATIVE, R_ARM_IRELATIVE},
188fd7ae
CL		 2049 {BFD_RELOC_ARM_GOTFUNCDESC, R_ARM_GOTFUNCDESC},
2050 {BFD_RELOC_ARM_GOTOFFFUNCDESC, R_ARM_GOTOFFFUNCDESC},
2051 {BFD_RELOC_ARM_FUNCDESC, R_ARM_FUNCDESC},
2052 {BFD_RELOC_ARM_FUNCDESC_VALUE, R_ARM_FUNCDESC_VALUE},
5c5a4843
CL		 2053 {BFD_RELOC_ARM_TLS_GD32_FDPIC, R_ARM_TLS_GD32_FDPIC},
2054 {BFD_RELOC_ARM_TLS_LDM32_FDPIC, R_ARM_TLS_LDM32_FDPIC},
2055 {BFD_RELOC_ARM_TLS_IE32_FDPIC, R_ARM_TLS_IE32_FDPIC},
c19d1205
ZW		 2056 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
2057 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
b6895b4f
PB		 2058 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
2059 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
2060 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
2061 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
2062 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
2063 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
2064 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
2065 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
4962c51a
MS		 2066 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
2067 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
2068 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
2069 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
2070 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
2071 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
2072 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
2073 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
2074 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
2075 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
2076 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
2077 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
2078 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
2079 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
2080 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
2081 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
2082 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
2083 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
2084 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
2085 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
2086 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
2087 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
2088 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
2089 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
2090 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
2091 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
2092 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
845b51d6 2093 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
72d98d16
MG		 2094 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX},
2095 {BFD_RELOC_ARM_THUMB_ALU_ABS_G3_NC, R_ARM_THM_ALU_ABS_G3_NC},
2096 {BFD_RELOC_ARM_THUMB_ALU_ABS_G2_NC, R_ARM_THM_ALU_ABS_G2_NC},
2097 {BFD_RELOC_ARM_THUMB_ALU_ABS_G1_NC, R_ARM_THM_ALU_ABS_G1_NC},
e5d6e09e 2098 {BFD_RELOC_ARM_THUMB_ALU_ABS_G0_NC, R_ARM_THM_ALU_ABS_G0_NC},
1caf72a5 2099 {BFD_RELOC_ARM_THUMB_BF17, R_ARM_THM_BF16},
1889da70 2100 {BFD_RELOC_ARM_THUMB_BF13, R_ARM_THM_BF12},
1caf72a5 2101 {BFD_RELOC_ARM_THUMB_BF19, R_ARM_THM_BF18}
7f266840
DJ		 2102 };
2103
2104static reloc_howto_type *
f1c71a59
ZW		 2105elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2106 bfd_reloc_code_real_type code)
7f266840
DJ		 2107{
2108 unsigned int i;
8029a119 2109
906e58ca 2110 for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++)
c19d1205
ZW		 2111 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
2112 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
7f266840 2113
c19d1205 2114 return NULL;
7f266840
DJ		 2115}
2116
157090f7
AM		 2117static reloc_howto_type *
2118elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2119 const char *r_name)
2120{
2121 unsigned int i;
2122
906e58ca 2123 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); i++)
157090f7
AM		 2124 if (elf32_arm_howto_table_1[i].name != NULL
2125 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
2126 return &elf32_arm_howto_table_1[i];
2127
906e58ca 2128 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++)
157090f7
AM		 2129 if (elf32_arm_howto_table_2[i].name != NULL
2130 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
2131 return &elf32_arm_howto_table_2[i];
2132
34e77a92
RS		 2133 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_3); i++)
2134 if (elf32_arm_howto_table_3[i].name != NULL
2135 && strcasecmp (elf32_arm_howto_table_3[i].name, r_name) == 0)
2136 return &elf32_arm_howto_table_3[i];
2137
157090f7
AM		 2138 return NULL;
2139}
2140
906e58ca
NC		 2141/* Support for core dump NOTE sections. */
2142
7f266840 2143static bfd_boolean
f1c71a59 2144elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7f266840
DJ		 2145{
2146 int offset;
2147 size_t size;
2148
2149 switch (note->descsz)
2150 {
2151 default:
2152 return FALSE;
2153
8029a119 2154 case 148: /* Linux/ARM 32-bit. */
7f266840 2155 /* pr_cursig */
228e534f 2156 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
7f266840
DJ		 2157
2158 /* pr_pid */
228e534f 2159 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
7f266840
DJ		 2160
2161 /* pr_reg */
2162 offset = 72;
2163 size = 72;
2164
2165 break;
2166 }
2167
2168 /* Make a ".reg/999" section. */
2169 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2170 size, note->descpos + offset);
2171}
2172
2173static bfd_boolean
f1c71a59 2174elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7f266840
DJ		 2175{
2176 switch (note->descsz)
2177 {
2178 default:
2179 return FALSE;
2180
8029a119 2181 case 124: /* Linux/ARM elf_prpsinfo. */
228e534f 2182 elf_tdata (abfd)->core->pid
4395ee08 2183 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 2184 elf_tdata (abfd)->core->program
7f266840 2185 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 2186 elf_tdata (abfd)->core->command
7f266840
DJ		 2187 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
2188 }
2189
2190 /* Note that for some reason, a spurious space is tacked
2191 onto the end of the args in some (at least one anyway)
2192 implementations, so strip it off if it exists. */
7f266840 2193 {
228e534f 2194 char *command = elf_tdata (abfd)->core->command;
7f266840
DJ		 2195 int n = strlen (command);
2196
2197 if (0 < n && command[n - 1] == ' ')
2198 command[n - 1] = '\0';
2199 }
2200
2201 return TRUE;
2202}
2203
1f20dca5
UW		 2204static char *
2205elf32_arm_nabi_write_core_note (bfd *abfd, char *buf, int *bufsiz,
2206 int note_type, ...)
2207{
2208 switch (note_type)
2209 {
2210 default:
2211 return NULL;
2212
2213 case NT_PRPSINFO:
2214 {
602f1657 2215 char data[124] ATTRIBUTE_NONSTRING;
1f20dca5
UW		 2216 va_list ap;
2217
2218 va_start (ap, note_type);
2219 memset (data, 0, sizeof (data));
2220 strncpy (data + 28, va_arg (ap, const char *), 16);
be3e27bb 2221#if GCC_VERSION == 8000 || GCC_VERSION == 8001
95da9854 2222 DIAGNOSTIC_PUSH;
be3e27bb 2223 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
95da9854
L		 2224 -Wstringop-truncation:
2225 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
2226 */
95da9854
L		 2227 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
2228#endif
1f20dca5 2229 strncpy (data + 44, va_arg (ap, const char *), 80);
be3e27bb 2230#if GCC_VERSION == 8000 || GCC_VERSION == 8001
95da9854 2231 DIAGNOSTIC_POP;
fe75810f 2232#endif
1f20dca5
UW		 2233 va_end (ap);
2234
2235 return elfcore_write_note (abfd, buf, bufsiz,
2236 "CORE", note_type, data, sizeof (data));
2237 }
2238
2239 case NT_PRSTATUS:
2240 {
2241 char data[148];
2242 va_list ap;
2243 long pid;
2244 int cursig;
2245 const void *greg;
2246
2247 va_start (ap, note_type);
2248 memset (data, 0, sizeof (data));
2249 pid = va_arg (ap, long);
2250 bfd_put_32 (abfd, pid, data + 24);
2251 cursig = va_arg (ap, int);
2252 bfd_put_16 (abfd, cursig, data + 12);
2253 greg = va_arg (ap, const void *);
2254 memcpy (data + 72, greg, 72);
2255 va_end (ap);
2256
2257 return elfcore_write_note (abfd, buf, bufsiz,
2258 "CORE", note_type, data, sizeof (data));
2259 }
2260 }
2261}
2262
07d6d2b8
AM		 2263#define TARGET_LITTLE_SYM arm_elf32_le_vec
2264#define TARGET_LITTLE_NAME "elf32-littlearm"
2265#define TARGET_BIG_SYM arm_elf32_be_vec
2266#define TARGET_BIG_NAME "elf32-bigarm"
7f266840
DJ		 2267
2268#define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
2269#define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1f20dca5 2270#define elf_backend_write_core_note elf32_arm_nabi_write_core_note
7f266840 2271
252b5132
RH		 2272typedef unsigned long int insn32;
2273typedef unsigned short int insn16;
2274
3a4a14e9
PB		 2275/* In lieu of proper flags, assume all EABIv4 or later objects are
2276 interworkable. */
57e8b36a 2277#define INTERWORK_FLAG(abfd) \
3a4a14e9 2278 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
3e6b1042
DJ		 2279 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
2280 || ((abfd)->flags & BFD_LINKER_CREATED))
9b485d32 2281
252b5132
RH		 2282/* The linker script knows the section names for placement.
2283 The entry_names are used to do simple name mangling on the stubs.
2284 Given a function name, and its type, the stub can be found. The
9b485d32 2285 name can be changed. The only requirement is the %s be present. */
252b5132
RH		 2286#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
2287#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
2288
2289#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
2290#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
2291
c7b8f16e
JB		 2292#define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
2293#define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
2294
a504d23a
LA		 2295#define STM32L4XX_ERRATUM_VENEER_SECTION_NAME ".text.stm32l4xx_veneer"
2296#define STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "__stm32l4xx_veneer_%x"
2297
845b51d6
PB		 2298#define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
2299#define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
2300
7413f23f
DJ		 2301#define STUB_ENTRY_NAME "__%s_veneer"
2302
4ba2ef8f
TP		 2303#define CMSE_PREFIX "__acle_se_"
2304
4d83e8d9
CL		 2305#define CMSE_STUB_NAME ".gnu.sgstubs"
2306
252b5132
RH		 2307/* The name of the dynamic interpreter. This is put in the .interp
2308 section. */
2309#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2310
cb10292c
CL		 2311/* FDPIC default stack size. */
2312#define DEFAULT_STACK_SIZE 0x8000
2313
0855e32b 2314static const unsigned long tls_trampoline [] =
b38cadfb
NC		 2315{
2316 0xe08e0000, /* add r0, lr, r0 */
2317 0xe5901004, /* ldr r1, [r0,#4] */
2318 0xe12fff11, /* bx r1 */
2319};
0855e32b
NS		 2320
2321static const unsigned long dl_tlsdesc_lazy_trampoline [] =
b38cadfb
NC		 2322{
2323 0xe52d2004, /* push {r2} */
2324 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2325 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2326 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2327 0xe081100f, /* 2: add r1, pc */
2328 0xe12fff12, /* bx r2 */
2329 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
99059e56 2330 + dl_tlsdesc_lazy_resolver(GOT) */
b38cadfb
NC		 2331 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2332};
0855e32b 2333
b4e87f2c
TC		 2334/* NOTE: [Thumb nop sequence]
2335 When adding code that transitions from Thumb to Arm the instruction that
2336 should be used for the alignment padding should be 0xe7fd (b .-2) instead of
2337 a nop for performance reasons. */
2338
7801f98f
CL		 2339/* ARM FDPIC PLT entry. */
2340/* The last 5 words contain PLT lazy fragment code and data. */
2341static const bfd_vma elf32_arm_fdpic_plt_entry [] =
2342 {
2343 0xe59fc008, /* ldr r12, .L1 */
2344 0xe08cc009, /* add r12, r12, r9 */
2345 0xe59c9004, /* ldr r9, [r12, #4] */
2346 0xe59cf000, /* ldr pc, [r12] */
2347 0x00000000, /* L1. .word foo(GOTOFFFUNCDESC) */
2348 0x00000000, /* L1. .word foo(funcdesc_value_reloc_offset) */
2349 0xe51fc00c, /* ldr r12, [pc, #-12] */
2350 0xe92d1000, /* push {r12} */
2351 0xe599c004, /* ldr r12, [r9, #4] */
2352 0xe599f000, /* ldr pc, [r9] */
2353 };
2354
59029f57
CL		 2355/* Thumb FDPIC PLT entry. */
2356/* The last 5 words contain PLT lazy fragment code and data. */
2357static const bfd_vma elf32_arm_fdpic_thumb_plt_entry [] =
2358 {
2359 0xc00cf8df, /* ldr.w r12, .L1 */
2360 0x0c09eb0c, /* add.w r12, r12, r9 */
2361 0x9004f8dc, /* ldr.w r9, [r12, #4] */
2362 0xf000f8dc, /* ldr.w pc, [r12] */
2363 0x00000000, /* .L1 .word foo(GOTOFFFUNCDESC) */
2364 0x00000000, /* .L2 .word foo(funcdesc_value_reloc_offset) */
2365 0xc008f85f, /* ldr.w r12, .L2 */
2366 0xcd04f84d, /* push {r12} */
2367 0xc004f8d9, /* ldr.w r12, [r9, #4] */
2368 0xf000f8d9, /* ldr.w pc, [r9] */
2369 };
2370
5e681ec4
PB		 2371#ifdef FOUR_WORD_PLT
2372
252b5132
RH		 2373/* The first entry in a procedure linkage table looks like
2374 this. It is set up so that any shared library function that is
59f2c4e7 2375 called before the relocation has been set up calls the dynamic
9b485d32 2376 linker first. */
e5a52504 2377static const bfd_vma elf32_arm_plt0_entry [] =
b38cadfb
NC		 2378{
2379 0xe52de004, /* str lr, [sp, #-4]! */
2380 0xe59fe010, /* ldr lr, [pc, #16] */
2381 0xe08fe00e, /* add lr, pc, lr */
2382 0xe5bef008, /* ldr pc, [lr, #8]! */
2383};
5e681ec4
PB		 2384
2385/* Subsequent entries in a procedure linkage table look like
2386 this. */
e5a52504 2387static const bfd_vma elf32_arm_plt_entry [] =
b38cadfb
NC		 2388{
2389 0xe28fc600, /* add ip, pc, #NN */
2390 0xe28cca00, /* add ip, ip, #NN */
2391 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2392 0x00000000, /* unused */
2393};
5e681ec4 2394
eed94f8f 2395#else /* not FOUR_WORD_PLT */
5e681ec4 2396
5e681ec4
PB		 2397/* The first entry in a procedure linkage table looks like
2398 this. It is set up so that any shared library function that is
2399 called before the relocation has been set up calls the dynamic
2400 linker first. */
e5a52504 2401static const bfd_vma elf32_arm_plt0_entry [] =
b38cadfb 2402{
07d6d2b8
AM		 2403 0xe52de004, /* str lr, [sp, #-4]! */
2404 0xe59fe004, /* ldr lr, [pc, #4] */
2405 0xe08fe00e, /* add lr, pc, lr */
2406 0xe5bef008, /* ldr pc, [lr, #8]! */
2407 0x00000000, /* &GOT[0] - . */
b38cadfb 2408};
252b5132 2409
1db37fe6
YG		 2410/* By default subsequent entries in a procedure linkage table look like
2411 this. Offsets that don't fit into 28 bits will cause link error. */
2412static const bfd_vma elf32_arm_plt_entry_short [] =
b38cadfb
NC		 2413{
2414 0xe28fc600, /* add ip, pc, #0xNN00000 */
2415 0xe28cca00, /* add ip, ip, #0xNN000 */
2416 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2417};
5e681ec4 2418
1db37fe6
YG		 2419/* When explicitly asked, we'll use this "long" entry format
2420 which can cope with arbitrary displacements. */
2421static const bfd_vma elf32_arm_plt_entry_long [] =
2422{
07d6d2b8
AM		 2423 0xe28fc200, /* add ip, pc, #0xN0000000 */
2424 0xe28cc600, /* add ip, ip, #0xNN00000 */
1db37fe6
YG		 2425 0xe28cca00, /* add ip, ip, #0xNN000 */
2426 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2427};
2428
2429static bfd_boolean elf32_arm_use_long_plt_entry = FALSE;
2430
eed94f8f
NC		 2431#endif /* not FOUR_WORD_PLT */
2432
2433/* The first entry in a procedure linkage table looks like this.
2434 It is set up so that any shared library function that is called before the
2435 relocation has been set up calls the dynamic linker first. */
2436static const bfd_vma elf32_thumb2_plt0_entry [] =
2437{
2438 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2439 an instruction maybe encoded to one or two array elements. */
07d6d2b8
AM		 2440 0xf8dfb500, /* push {lr} */
2441 0x44fee008, /* ldr.w lr, [pc, #8] */
2442 /* add lr, pc */
eed94f8f 2443 0xff08f85e, /* ldr.w pc, [lr, #8]! */
07d6d2b8 2444 0x00000000, /* &GOT[0] - . */
eed94f8f
NC		 2445};
2446
2447/* Subsequent entries in a procedure linkage table for thumb only target
2448 look like this. */
2449static const bfd_vma elf32_thumb2_plt_entry [] =
2450{
2451 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2452 an instruction maybe encoded to one or two array elements. */
07d6d2b8
AM		 2453 0x0c00f240, /* movw ip, #0xNNNN */
2454 0x0c00f2c0, /* movt ip, #0xNNNN */
2455 0xf8dc44fc, /* add ip, pc */
15ccbdd7
TC		 2456 0xe7fcf000 /* ldr.w pc, [ip] */
2457 /* b .-4 */
eed94f8f 2458};
252b5132 2459
00a97672
RS		 2460/* The format of the first entry in the procedure linkage table
2461 for a VxWorks executable. */
2462static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
b38cadfb 2463{
07d6d2b8
AM		 2464 0xe52dc008, /* str ip,[sp,#-8]! */
2465 0xe59fc000, /* ldr ip,[pc] */
2466 0xe59cf008, /* ldr pc,[ip,#8] */
2467 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
b38cadfb 2468};
00a97672
RS		 2469
2470/* The format of subsequent entries in a VxWorks executable. */
2471static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
b38cadfb 2472{
07d6d2b8
AM		 2473 0xe59fc000, /* ldr ip,[pc] */
2474 0xe59cf000, /* ldr pc,[ip] */
2475 0x00000000, /* .long @got */
2476 0xe59fc000, /* ldr ip,[pc] */
2477 0xea000000, /* b _PLT */
2478 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
b38cadfb 2479};
00a97672
RS		 2480
2481/* The format of entries in a VxWorks shared library. */
2482static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
b38cadfb 2483{
07d6d2b8
AM		 2484 0xe59fc000, /* ldr ip,[pc] */
2485 0xe79cf009, /* ldr pc,[ip,r9] */
2486 0x00000000, /* .long @got */
2487 0xe59fc000, /* ldr ip,[pc] */
2488 0xe599f008, /* ldr pc,[r9,#8] */
2489 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
b38cadfb 2490};
00a97672 2491
b7693d02
DJ		 2492/* An initial stub used if the PLT entry is referenced from Thumb code. */
2493#define PLT_THUMB_STUB_SIZE 4
2494static const bfd_vma elf32_arm_plt_thumb_stub [] =
b38cadfb
NC		 2495{
2496 0x4778, /* bx pc */
b4e87f2c 2497 0xe7fd /* b .-2 */
b38cadfb 2498};
b7693d02 2499
e5a52504
MM		 2500/* The entries in a PLT when using a DLL-based target with multiple
2501 address spaces. */
906e58ca 2502static const bfd_vma elf32_arm_symbian_plt_entry [] =
b38cadfb 2503{
07d6d2b8
AM		 2504 0xe51ff004, /* ldr pc, [pc, #-4] */
2505 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
b38cadfb
NC		 2506};
2507
2508/* The first entry in a procedure linkage table looks like
2509 this. It is set up so that any shared library function that is
2510 called before the relocation has been set up calls the dynamic
2511 linker first. */
2512static const bfd_vma elf32_arm_nacl_plt0_entry [] =
2513{
2514 /* First bundle: */
2515 0xe300c000, /* movw ip, #:lower16:&GOT[2]-.+8 */
2516 0xe340c000, /* movt ip, #:upper16:&GOT[2]-.+8 */
2517 0xe08cc00f, /* add ip, ip, pc */
2518 0xe52dc008, /* str ip, [sp, #-8]! */
2519 /* Second bundle: */
edccdf7c
RM		 2520 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2521 0xe59cc000, /* ldr ip, [ip] */
b38cadfb 2522 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
edccdf7c 2523 0xe12fff1c, /* bx ip */
b38cadfb 2524 /* Third bundle: */
edccdf7c
RM		 2525 0xe320f000, /* nop */
2526 0xe320f000, /* nop */
2527 0xe320f000, /* nop */
b38cadfb
NC		 2528 /* .Lplt_tail: */
2529 0xe50dc004, /* str ip, [sp, #-4] */
2530 /* Fourth bundle: */
edccdf7c
RM		 2531 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2532 0xe59cc000, /* ldr ip, [ip] */
b38cadfb 2533 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
edccdf7c 2534 0xe12fff1c, /* bx ip */
b38cadfb
NC		 2535};
2536#define ARM_NACL_PLT_TAIL_OFFSET (11 * 4)
2537
2538/* Subsequent entries in a procedure linkage table look like this. */
2539static const bfd_vma elf32_arm_nacl_plt_entry [] =
2540{
2541 0xe300c000, /* movw ip, #:lower16:&GOT[n]-.+8 */
2542 0xe340c000, /* movt ip, #:upper16:&GOT[n]-.+8 */
2543 0xe08cc00f, /* add ip, ip, pc */
2544 0xea000000, /* b .Lplt_tail */
2545};
e5a52504 2546
906e58ca
NC		 2547#define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2548#define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2549#define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2550#define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2551#define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2552#define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
c5423981
TG		 2553#define THM2_MAX_FWD_COND_BRANCH_OFFSET (((1 << 20) -2) + 4)
2554#define THM2_MAX_BWD_COND_BRANCH_OFFSET (-(1 << 20) + 4)
906e58ca 2555
461a49ca 2556enum stub_insn_type
b38cadfb
NC		 2557{
2558 THUMB16_TYPE = 1,
2559 THUMB32_TYPE,
2560 ARM_TYPE,
2561 DATA_TYPE
2562};
461a49ca 2563
48229727
JB		 2564#define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2565/* A bit of a hack. A Thumb conditional branch, in which the proper condition
2566 is inserted in arm_build_one_stub(). */
2567#define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2568#define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
d5a67c02
AV		 2569#define THUMB32_MOVT(X) {(X), THUMB32_TYPE, R_ARM_THM_MOVT_ABS, 0}
2570#define THUMB32_MOVW(X) {(X), THUMB32_TYPE, R_ARM_THM_MOVW_ABS_NC, 0}
48229727
JB		 2571#define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2572#define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2573#define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2574#define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
461a49ca
DJ		 2575
2576typedef struct
2577{
07d6d2b8 2578 bfd_vma data;
b38cadfb 2579 enum stub_insn_type type;
07d6d2b8
AM		 2580 unsigned int r_type;
2581 int reloc_addend;
461a49ca
DJ		 2582} insn_sequence;
2583
b4e87f2c
TC		 2584/* See note [Thumb nop sequence] when adding a veneer. */
2585
fea2b4d6
CL		 2586/* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2587 to reach the stub if necessary. */
461a49ca 2588static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
b38cadfb 2589{
07d6d2b8 2590 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
b38cadfb
NC		 2591 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2592};
906e58ca 2593
fea2b4d6
CL		 2594/* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2595 available. */
461a49ca 2596static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb[] =
b38cadfb 2597{
07d6d2b8
AM		 2598 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2599 ARM_INSN (0xe12fff1c), /* bx ip */
b38cadfb
NC		 2600 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2601};
906e58ca 2602
d3626fb0 2603/* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
461a49ca 2604static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] =
b38cadfb 2605{
07d6d2b8
AM		 2606 THUMB16_INSN (0xb401), /* push {r0} */
2607 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2608 THUMB16_INSN (0x4684), /* mov ip, r0 */
2609 THUMB16_INSN (0xbc01), /* pop {r0} */
2610 THUMB16_INSN (0x4760), /* bx ip */
2611 THUMB16_INSN (0xbf00), /* nop */
b38cadfb
NC		 2612 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2613};
906e58ca 2614
80c135e5
TP		 2615/* Thumb -> Thumb long branch stub in thumb2 encoding. Used on armv7. */
2616static const insn_sequence elf32_arm_stub_long_branch_thumb2_only[] =
2617{
07d6d2b8 2618 THUMB32_INSN (0xf85ff000), /* ldr.w pc, [pc, #-0] */
80c135e5
TP		 2619 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(x) */
2620};
2621
d5a67c02
AV		 2622/* Thumb -> Thumb long branch stub. Used for PureCode sections on Thumb2
2623 M-profile architectures. */
2624static const insn_sequence elf32_arm_stub_long_branch_thumb2_only_pure[] =
2625{
2626 THUMB32_MOVW (0xf2400c00), /* mov.w ip, R_ARM_MOVW_ABS_NC */
2627 THUMB32_MOVT (0xf2c00c00), /* movt ip, R_ARM_MOVT_ABS << 16 */
07d6d2b8 2628 THUMB16_INSN (0x4760), /* bx ip */
d5a67c02
AV		 2629};
2630
d3626fb0
CL		 2631/* V4T Thumb -> Thumb long branch stub. Using the stack is not
2632 allowed. */
2633static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
b38cadfb 2634{
07d6d2b8 2635 THUMB16_INSN (0x4778), /* bx pc */
b4e87f2c 2636 THUMB16_INSN (0xe7fd), /* b .-2 */
07d6d2b8
AM		 2637 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2638 ARM_INSN (0xe12fff1c), /* bx ip */
b38cadfb
NC		 2639 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2640};
d3626fb0 2641
fea2b4d6
CL		 2642/* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2643 available. */
461a49ca 2644static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
b38cadfb 2645{
07d6d2b8 2646 THUMB16_INSN (0x4778), /* bx pc */
b4e87f2c 2647 THUMB16_INSN (0xe7fd), /* b .-2 */
07d6d2b8 2648 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
b38cadfb
NC		 2649 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2650};
906e58ca 2651
fea2b4d6
CL		 2652/* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2653 one, when the destination is close enough. */
461a49ca 2654static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
b38cadfb 2655{
07d6d2b8 2656 THUMB16_INSN (0x4778), /* bx pc */
b4e87f2c 2657 THUMB16_INSN (0xe7fd), /* b .-2 */
b38cadfb
NC		 2658 ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
2659};
c820be07 2660
cf3eccff 2661/* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
fea2b4d6 2662 blx to reach the stub if necessary. */
cf3eccff 2663static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic[] =
b38cadfb 2664{
07d6d2b8
AM		 2665 ARM_INSN (0xe59fc000), /* ldr ip, [pc] */
2666 ARM_INSN (0xe08ff00c), /* add pc, pc, ip */
b38cadfb
NC		 2667 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2668};
906e58ca 2669
cf3eccff
DJ		 2670/* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2671 blx to reach the stub if necessary. We can not add into pc;
2672 it is not guaranteed to mode switch (different in ARMv6 and
2673 ARMv7). */
2674static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic[] =
b38cadfb 2675{
07d6d2b8
AM		 2676 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2677 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2678 ARM_INSN (0xe12fff1c), /* bx ip */
b38cadfb
NC		 2679 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2680};
cf3eccff 2681
ebe24dd4
CL		 2682/* V4T ARM -> ARM long branch stub, PIC. */
2683static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
b38cadfb 2684{
07d6d2b8
AM		 2685 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2686 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2687 ARM_INSN (0xe12fff1c), /* bx ip */
b38cadfb
NC		 2688 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2689};
ebe24dd4
CL		 2690
2691/* V4T Thumb -> ARM long branch stub, PIC. */
2692static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
b38cadfb 2693{
07d6d2b8 2694 THUMB16_INSN (0x4778), /* bx pc */
b4e87f2c 2695 THUMB16_INSN (0xe7fd), /* b .-2 */
07d6d2b8
AM		 2696 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2697 ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
b38cadfb
NC		 2698 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2699};
ebe24dd4 2700
d3626fb0
CL		 2701/* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2702 architectures. */
ebe24dd4 2703static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
b38cadfb 2704{
07d6d2b8
AM		 2705 THUMB16_INSN (0xb401), /* push {r0} */
2706 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2707 THUMB16_INSN (0x46fc), /* mov ip, pc */
2708 THUMB16_INSN (0x4484), /* add ip, r0 */
2709 THUMB16_INSN (0xbc01), /* pop {r0} */
2710 THUMB16_INSN (0x4760), /* bx ip */
b38cadfb
NC		 2711 DATA_WORD (0, R_ARM_REL32, 4), /* dcd R_ARM_REL32(X) */
2712};
ebe24dd4 2713
d3626fb0
CL		 2714/* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2715 allowed. */
2716static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
b38cadfb 2717{
07d6d2b8 2718 THUMB16_INSN (0x4778), /* bx pc */
b4e87f2c 2719 THUMB16_INSN (0xe7fd), /* b .-2 */
07d6d2b8
AM		 2720 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2721 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2722 ARM_INSN (0xe12fff1c), /* bx ip */
b38cadfb
NC		 2723 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2724};
d3626fb0 2725
0855e32b
NS		 2726/* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2727 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2728static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic[] =
2729{
07d6d2b8
AM		 2730 ARM_INSN (0xe59f1000), /* ldr r1, [pc] */
2731 ARM_INSN (0xe08ff001), /* add pc, pc, r1 */
b38cadfb 2732 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
0855e32b
NS		 2733};
2734
2735/* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2736 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2737static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic[] =
2738{
07d6d2b8 2739 THUMB16_INSN (0x4778), /* bx pc */
b4e87f2c 2740 THUMB16_INSN (0xe7fd), /* b .-2 */
07d6d2b8
AM		 2741 ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
2742 ARM_INSN (0xe081f00f), /* add pc, r1, pc */
b38cadfb 2743 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
0855e32b
NS		 2744};
2745
7a89b94e
NC		 2746/* NaCl ARM -> ARM long branch stub. */
2747static const insn_sequence elf32_arm_stub_long_branch_arm_nacl[] =
2748{
2749 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2750 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
07d6d2b8
AM		 2751 ARM_INSN (0xe12fff1c), /* bx ip */
2752 ARM_INSN (0xe320f000), /* nop */
2753 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2754 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2755 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2756 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
7a89b94e
NC		 2757};
2758
2759/* NaCl ARM -> ARM long branch stub, PIC. */
2760static const insn_sequence elf32_arm_stub_long_branch_arm_nacl_pic[] =
2761{
2762 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
07d6d2b8 2763 ARM_INSN (0xe08cc00f), /* add ip, ip, pc */
7a89b94e 2764 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
07d6d2b8
AM		 2765 ARM_INSN (0xe12fff1c), /* bx ip */
2766 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2767 DATA_WORD (0, R_ARM_REL32, 8), /* dcd R_ARM_REL32(X+8) */
2768 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2769 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
7a89b94e
NC		 2770};
2771
4ba2ef8f
TP		 2772/* Stub used for transition to secure state (aka SG veneer). */
2773static const insn_sequence elf32_arm_stub_cmse_branch_thumb_only[] =
2774{
2775 THUMB32_INSN (0xe97fe97f), /* sg. */
2776 THUMB32_B_INSN (0xf000b800, -4), /* b.w original_branch_dest. */
2777};
2778
7a89b94e 2779
48229727
JB		 2780/* Cortex-A8 erratum-workaround stubs. */
2781
2782/* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2783 can't use a conditional branch to reach this stub). */
2784
2785static const insn_sequence elf32_arm_stub_a8_veneer_b_cond[] =
b38cadfb 2786{
07d6d2b8 2787 THUMB16_BCOND_INSN (0xd001), /* b<cond>.n true. */
b38cadfb
NC		 2788 THUMB32_B_INSN (0xf000b800, -4), /* b.w insn_after_original_branch. */
2789 THUMB32_B_INSN (0xf000b800, -4) /* true: b.w original_branch_dest. */
2790};
48229727
JB		 2791
2792/* Stub used for b.w and bl.w instructions. */
2793
2794static const insn_sequence elf32_arm_stub_a8_veneer_b[] =
b38cadfb
NC		 2795{
2796 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2797};
48229727
JB		 2798
2799static const insn_sequence elf32_arm_stub_a8_veneer_bl[] =
b38cadfb
NC		 2800{
2801 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2802};
48229727
JB		 2803
2804/* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2805 instruction (which switches to ARM mode) to point to this stub. Jump to the
2806 real destination using an ARM-mode branch. */
2807
2808static const insn_sequence elf32_arm_stub_a8_veneer_blx[] =
b38cadfb
NC		 2809{
2810 ARM_REL_INSN (0xea000000, -8) /* b original_branch_dest. */
2811};
48229727 2812
9553db3c
NC		 2813/* For each section group there can be a specially created linker section
2814 to hold the stubs for that group. The name of the stub section is based
2815 upon the name of another section within that group with the suffix below
2816 applied.
2817
2818 PR 13049: STUB_SUFFIX used to be ".stub", but this allowed the user to
2819 create what appeared to be a linker stub section when it actually
2820 contained user code/data. For example, consider this fragment:
b38cadfb 2821
9553db3c
NC		 2822 const char * stubborn_problems[] = { "np" };
2823
2824 If this is compiled with "-fPIC -fdata-sections" then gcc produces a
2825 section called:
2826
2827 .data.rel.local.stubborn_problems
2828
2829 This then causes problems in arm32_arm_build_stubs() as it triggers:
2830
2831 // Ignore non-stub sections.
2832 if (!strstr (stub_sec->name, STUB_SUFFIX))
2833 continue;
2834
2835 And so the section would be ignored instead of being processed. Hence
2836 the change in definition of STUB_SUFFIX to a name that cannot be a valid
2837 C identifier. */
2838#define STUB_SUFFIX ".__stub"
906e58ca 2839
738a79f6
CL		 2840/* One entry per long/short branch stub defined above. */
2841#define DEF_STUBS \
2842 DEF_STUB(long_branch_any_any) \
2843 DEF_STUB(long_branch_v4t_arm_thumb) \
2844 DEF_STUB(long_branch_thumb_only) \
2845 DEF_STUB(long_branch_v4t_thumb_thumb) \
2846 DEF_STUB(long_branch_v4t_thumb_arm) \
2847 DEF_STUB(short_branch_v4t_thumb_arm) \
2848 DEF_STUB(long_branch_any_arm_pic) \
2849 DEF_STUB(long_branch_any_thumb_pic) \
2850 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2851 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2852 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
48229727 2853 DEF_STUB(long_branch_thumb_only_pic) \
0855e32b
NS		 2854 DEF_STUB(long_branch_any_tls_pic) \
2855 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
7a89b94e
NC		 2856 DEF_STUB(long_branch_arm_nacl) \
2857 DEF_STUB(long_branch_arm_nacl_pic) \
4ba2ef8f 2858 DEF_STUB(cmse_branch_thumb_only) \
48229727
JB		 2859 DEF_STUB(a8_veneer_b_cond) \
2860 DEF_STUB(a8_veneer_b) \
2861 DEF_STUB(a8_veneer_bl) \
80c135e5
TP		 2862 DEF_STUB(a8_veneer_blx) \
2863 DEF_STUB(long_branch_thumb2_only) \
d5a67c02 2864 DEF_STUB(long_branch_thumb2_only_pure)
738a79f6
CL		 2865
2866#define DEF_STUB(x) arm_stub_##x,
b38cadfb
NC		 2867enum elf32_arm_stub_type
2868{
906e58ca 2869 arm_stub_none,
738a79f6 2870 DEF_STUBS
4f4faa4d 2871 max_stub_type
738a79f6
CL		 2872};
2873#undef DEF_STUB
2874
8d9d9490
TP		 2875/* Note the first a8_veneer type. */
2876const unsigned arm_stub_a8_veneer_lwm = arm_stub_a8_veneer_b_cond;
2877
738a79f6
CL		 2878typedef struct
2879{
d3ce72d0 2880 const insn_sequence* template_sequence;
738a79f6
CL		 2881 int template_size;
2882} stub_def;
2883
2884#define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
b38cadfb
NC		 2885static const stub_def stub_definitions[] =
2886{
738a79f6
CL		 2887 {NULL, 0},
2888 DEF_STUBS
906e58ca
NC		 2889};
2890
2891struct elf32_arm_stub_hash_entry
2892{
2893 /* Base hash table entry structure. */
2894 struct bfd_hash_entry root;
2895
2896 /* The stub section. */
2897 asection *stub_sec;
2898
2899 /* Offset within stub_sec of the beginning of this stub. */
2900 bfd_vma stub_offset;
2901
2902 /* Given the symbol's value and its section we can determine its final
2903 value when building the stubs (so the stub knows where to jump). */
2904 bfd_vma target_value;
2905 asection *target_section;
2906
8d9d9490
TP		 2907 /* Same as above but for the source of the branch to the stub. Used for
2908 Cortex-A8 erratum workaround to patch it to branch to the stub. As
2909 such, source section does not need to be recorded since Cortex-A8 erratum
2910 workaround stubs are only generated when both source and target are in the
2911 same section. */
2912 bfd_vma source_value;
48229727
JB		 2913
2914 /* The instruction which caused this stub to be generated (only valid for
2915 Cortex-A8 erratum workaround stubs at present). */
2916 unsigned long orig_insn;
2917
461a49ca 2918 /* The stub type. */
906e58ca 2919 enum elf32_arm_stub_type stub_type;
461a49ca
DJ		 2920 /* Its encoding size in bytes. */
2921 int stub_size;
2922 /* Its template. */
2923 const insn_sequence *stub_template;
2924 /* The size of the template (number of entries). */
2925 int stub_template_size;
906e58ca
NC		 2926
2927 /* The symbol table entry, if any, that this was derived from. */
2928 struct elf32_arm_link_hash_entry *h;
2929
35fc36a8
RS		 2930 /* Type of branch. */
2931 enum arm_st_branch_type branch_type;
906e58ca
NC		 2932
2933 /* Where this stub is being called from, or, in the case of combined
2934 stub sections, the first input section in the group. */
2935 asection *id_sec;
7413f23f
DJ		 2936
2937 /* The name for the local symbol at the start of this stub. The
2938 stub name in the hash table has to be unique; this does not, so
2939 it can be friendlier. */
2940 char *output_name;
906e58ca
NC		 2941};
2942
e489d0ae
PB		 2943/* Used to build a map of a section. This is required for mixed-endian
2944 code/data. */
2945
2946typedef struct elf32_elf_section_map
2947{
2948 bfd_vma vma;
2949 char type;
2950}
2951elf32_arm_section_map;
2952
c7b8f16e
JB		 2953/* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2954
2955typedef enum
2956{
2957 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2958 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2959 VFP11_ERRATUM_ARM_VENEER,
2960 VFP11_ERRATUM_THUMB_VENEER
2961}
2962elf32_vfp11_erratum_type;
2963
2964typedef struct elf32_vfp11_erratum_list
2965{
2966 struct elf32_vfp11_erratum_list *next;
2967 bfd_vma vma;
2968 union
2969 {
2970 struct
2971 {
2972 struct elf32_vfp11_erratum_list *veneer;
2973 unsigned int vfp_insn;
2974 } b;
2975 struct
2976 {
2977 struct elf32_vfp11_erratum_list *branch;
2978 unsigned int id;
2979 } v;
2980 } u;
2981 elf32_vfp11_erratum_type type;
2982}
2983elf32_vfp11_erratum_list;
2984
a504d23a
LA		 2985/* Information about a STM32L4XX erratum veneer, or a branch to such a
2986 veneer. */
2987typedef enum
2988{
2989 STM32L4XX_ERRATUM_BRANCH_TO_VENEER,
2990 STM32L4XX_ERRATUM_VENEER
2991}
2992elf32_stm32l4xx_erratum_type;
2993
2994typedef struct elf32_stm32l4xx_erratum_list
2995{
2996 struct elf32_stm32l4xx_erratum_list *next;
2997 bfd_vma vma;
2998 union
2999 {
3000 struct
3001 {
3002 struct elf32_stm32l4xx_erratum_list *veneer;
3003 unsigned int insn;
3004 } b;
3005 struct
3006 {
3007 struct elf32_stm32l4xx_erratum_list *branch;
3008 unsigned int id;
3009 } v;
3010 } u;
3011 elf32_stm32l4xx_erratum_type type;
3012}
3013elf32_stm32l4xx_erratum_list;
3014
2468f9c9
PB		 3015typedef enum
3016{
3017 DELETE_EXIDX_ENTRY,
3018 INSERT_EXIDX_CANTUNWIND_AT_END
3019}
3020arm_unwind_edit_type;
3021
3022/* A (sorted) list of edits to apply to an unwind table. */
3023typedef struct arm_unwind_table_edit
3024{
3025 arm_unwind_edit_type type;
3026 /* Note: we sometimes want to insert an unwind entry corresponding to a
3027 section different from the one we're currently writing out, so record the
3028 (text) section this edit relates to here. */
3029 asection *linked_section;
3030 unsigned int index;
3031 struct arm_unwind_table_edit *next;
3032}
3033arm_unwind_table_edit;
3034
8e3de13a 3035typedef struct _arm_elf_section_data
e489d0ae 3036{
2468f9c9 3037 /* Information about mapping symbols. */
e489d0ae 3038 struct bfd_elf_section_data elf;
8e3de13a 3039 unsigned int mapcount;
c7b8f16e 3040 unsigned int mapsize;
e489d0ae 3041 elf32_arm_section_map *map;
2468f9c9 3042 /* Information about CPU errata. */
c7b8f16e
JB		 3043 unsigned int erratumcount;
3044 elf32_vfp11_erratum_list *erratumlist;
a504d23a
LA		 3045 unsigned int stm32l4xx_erratumcount;
3046 elf32_stm32l4xx_erratum_list *stm32l4xx_erratumlist;
491d01d3 3047 unsigned int additional_reloc_count;
2468f9c9
PB		 3048 /* Information about unwind tables. */
3049 union
3050 {
3051 /* Unwind info attached to a text section. */
3052 struct
3053 {
3054 asection *arm_exidx_sec;
3055 } text;
3056
3057 /* Unwind info attached to an .ARM.exidx section. */
3058 struct
3059 {
3060 arm_unwind_table_edit *unwind_edit_list;
3061 arm_unwind_table_edit *unwind_edit_tail;
3062 } exidx;
3063 } u;
8e3de13a
NC		 3064}
3065_arm_elf_section_data;
e489d0ae
PB		 3066
3067#define elf32_arm_section_data(sec) \
8e3de13a 3068 ((_arm_elf_section_data *) elf_section_data (sec))
e489d0ae 3069
48229727
JB		 3070/* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
3071 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
3072 so may be created multiple times: we use an array of these entries whilst
3073 relaxing which we can refresh easily, then create stubs for each potentially
3074 erratum-triggering instruction once we've settled on a solution. */
3075
b38cadfb
NC		 3076struct a8_erratum_fix
3077{
48229727
JB		 3078 bfd *input_bfd;
3079 asection *section;
3080 bfd_vma offset;
8d9d9490 3081 bfd_vma target_offset;
48229727
JB		 3082 unsigned long orig_insn;
3083 char *stub_name;
3084 enum elf32_arm_stub_type stub_type;
35fc36a8 3085 enum arm_st_branch_type branch_type;
48229727
JB		 3086};
3087
3088/* A table of relocs applied to branches which might trigger Cortex-A8
3089 erratum. */
3090
b38cadfb
NC		 3091struct a8_erratum_reloc
3092{
48229727
JB		 3093 bfd_vma from;
3094 bfd_vma destination;
92750f34
DJ		 3095 struct elf32_arm_link_hash_entry *hash;
3096 const char *sym_name;
48229727 3097 unsigned int r_type;
35fc36a8 3098 enum arm_st_branch_type branch_type;
48229727
JB		 3099 bfd_boolean non_a8_stub;
3100};
3101
ba93b8ac
DJ		 3102/* The size of the thread control block. */
3103#define TCB_SIZE 8
3104
34e77a92
RS		 3105/* ARM-specific information about a PLT entry, over and above the usual
3106 gotplt_union. */
b38cadfb
NC		 3107struct arm_plt_info
3108{
34e77a92
RS		 3109 /* We reference count Thumb references to a PLT entry separately,
3110 so that we can emit the Thumb trampoline only if needed. */
3111 bfd_signed_vma thumb_refcount;
3112
3113 /* Some references from Thumb code may be eliminated by BL->BLX
3114 conversion, so record them separately. */
3115 bfd_signed_vma maybe_thumb_refcount;
3116
3117 /* How many of the recorded PLT accesses were from non-call relocations.
3118 This information is useful when deciding whether anything takes the
3119 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
3120 non-call references to the function should resolve directly to the
3121 real runtime target. */
3122 unsigned int noncall_refcount;
3123
3124 /* Since PLT entries have variable size if the Thumb prologue is
3125 used, we need to record the index into .got.plt instead of
3126 recomputing it from the PLT offset. */
3127 bfd_signed_vma got_offset;
3128};
3129
3130/* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
b38cadfb
NC		 3131struct arm_local_iplt_info
3132{
34e77a92
RS		 3133 /* The information that is usually found in the generic ELF part of
3134 the hash table entry. */
3135 union gotplt_union root;
3136
3137 /* The information that is usually found in the ARM-specific part of
3138 the hash table entry. */
3139 struct arm_plt_info arm;
3140
3141 /* A list of all potential dynamic relocations against this symbol. */
3142 struct elf_dyn_relocs *dyn_relocs;
3143};
3144
e8b09b87
CL		 3145/* Structure to handle FDPIC support for local functions. */
3146struct fdpic_local {
3147 unsigned int funcdesc_cnt;
3148 unsigned int gotofffuncdesc_cnt;
3149 int funcdesc_offset;
3150};
3151
0ffa91dd 3152struct elf_arm_obj_tdata
ba93b8ac
DJ		 3153{
3154 struct elf_obj_tdata root;
3155
3156 /* tls_type for each local got entry. */
3157 char *local_got_tls_type;
ee065d83 3158
0855e32b
NS		 3159 /* GOTPLT entries for TLS descriptors. */
3160 bfd_vma *local_tlsdesc_gotent;
3161
34e77a92
RS		 3162 /* Information for local symbols that need entries in .iplt. */
3163 struct arm_local_iplt_info **local_iplt;
3164
bf21ed78
MS		 3165 /* Zero to warn when linking objects with incompatible enum sizes. */
3166 int no_enum_size_warning;
a9dc9481
JM		 3167
3168 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
3169 int no_wchar_size_warning;
e8b09b87
CL		 3170
3171 /* Maintains FDPIC counters and funcdesc info. */
3172 struct fdpic_local *local_fdpic_cnts;
ba93b8ac
DJ		 3173};
3174
0ffa91dd
NC		 3175#define elf_arm_tdata(bfd) \
3176 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
ba93b8ac 3177
0ffa91dd
NC		 3178#define elf32_arm_local_got_tls_type(bfd) \
3179 (elf_arm_tdata (bfd)->local_got_tls_type)
3180
0855e32b
NS		 3181#define elf32_arm_local_tlsdesc_gotent(bfd) \
3182 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
3183
34e77a92
RS		 3184#define elf32_arm_local_iplt(bfd) \
3185 (elf_arm_tdata (bfd)->local_iplt)
3186
e8b09b87
CL		 3187#define elf32_arm_local_fdpic_cnts(bfd) \
3188 (elf_arm_tdata (bfd)->local_fdpic_cnts)
3189
0ffa91dd
NC		 3190#define is_arm_elf(bfd) \
3191 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
3192 && elf_tdata (bfd) != NULL \
4dfe6ac6 3193 && elf_object_id (bfd) == ARM_ELF_DATA)
ba93b8ac
DJ		 3194
3195static bfd_boolean
3196elf32_arm_mkobject (bfd *abfd)
3197{
0ffa91dd 3198 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
4dfe6ac6 3199 ARM_ELF_DATA);
ba93b8ac
DJ		 3200}
3201
ba93b8ac
DJ		 3202#define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
3203
e8b09b87
CL		 3204/* Structure to handle FDPIC support for extern functions. */
3205struct fdpic_global {
3206 unsigned int gotofffuncdesc_cnt;
3207 unsigned int gotfuncdesc_cnt;
3208 unsigned int funcdesc_cnt;
3209 int funcdesc_offset;
3210 int gotfuncdesc_offset;
3211};
3212
ba96a88f 3213/* Arm ELF linker hash entry. */
252b5132 3214struct elf32_arm_link_hash_entry
b38cadfb
NC		 3215{
3216 struct elf_link_hash_entry root;
252b5132 3217
b38cadfb
NC		 3218 /* Track dynamic relocs copied for this symbol. */
3219 struct elf_dyn_relocs *dyn_relocs;
b7693d02 3220
b38cadfb
NC		 3221 /* ARM-specific PLT information. */
3222 struct arm_plt_info plt;
ba93b8ac
DJ		 3223
3224#define GOT_UNKNOWN 0
3225#define GOT_NORMAL 1
3226#define GOT_TLS_GD 2
3227#define GOT_TLS_IE 4
0855e32b
NS		 3228#define GOT_TLS_GDESC 8
3229#define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
b38cadfb 3230 unsigned int tls_type : 8;
34e77a92 3231
b38cadfb
NC		 3232 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
3233 unsigned int is_iplt : 1;
34e77a92 3234
b38cadfb 3235 unsigned int unused : 23;
a4fd1a8e 3236
b38cadfb
NC		 3237 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
3238 starting at the end of the jump table. */
3239 bfd_vma tlsdesc_got;
0855e32b 3240
b38cadfb
NC		 3241 /* The symbol marking the real symbol location for exported thumb
3242 symbols with Arm stubs. */
3243 struct elf_link_hash_entry *export_glue;
906e58ca 3244
b38cadfb 3245 /* A pointer to the most recently used stub hash entry against this
8029a119 3246 symbol. */
b38cadfb 3247 struct elf32_arm_stub_hash_entry *stub_cache;
e8b09b87
CL		 3248
3249 /* Counter for FDPIC relocations against this symbol. */
3250 struct fdpic_global fdpic_cnts;
b38cadfb 3251};
252b5132 3252
252b5132 3253/* Traverse an arm ELF linker hash table. */
252b5132
RH		 3254#define elf32_arm_link_hash_traverse(table, func, info) \
3255 (elf_link_hash_traverse \
3256 (&(table)->root, \
b7693d02 3257 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
252b5132
RH		 3258 (info)))
3259
3260/* Get the ARM elf linker hash table from a link_info structure. */
3261#define elf32_arm_hash_table(info) \
4dfe6ac6
NC		 3262 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
3263 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
252b5132 3264
906e58ca
NC		 3265#define arm_stub_hash_lookup(table, string, create, copy) \
3266 ((struct elf32_arm_stub_hash_entry *) \
3267 bfd_hash_lookup ((table), (string), (create), (copy)))
3268
21d799b5
NC		 3269/* Array to keep track of which stub sections have been created, and
3270 information on stub grouping. */
3271struct map_stub
3272{
3273 /* This is the section to which stubs in the group will be
3274 attached. */
3275 asection *link_sec;
3276 /* The stub section. */
3277 asection *stub_sec;
3278};
3279
0855e32b
NS		 3280#define elf32_arm_compute_jump_table_size(htab) \
3281 ((htab)->next_tls_desc_index * 4)
3282
9b485d32 3283/* ARM ELF linker hash table. */
252b5132 3284struct elf32_arm_link_hash_table
906e58ca
NC		 3285{
3286 /* The main hash table. */
3287 struct elf_link_hash_table root;
252b5132 3288
906e58ca
NC		 3289 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
3290 bfd_size_type thumb_glue_size;
252b5132 3291
906e58ca
NC		 3292 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
3293 bfd_size_type arm_glue_size;
252b5132 3294
906e58ca
NC		 3295 /* The size in bytes of section containing the ARMv4 BX veneers. */
3296 bfd_size_type bx_glue_size;
845b51d6 3297
906e58ca
NC		 3298 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
3299 veneer has been populated. */
3300 bfd_vma bx_glue_offset[15];
845b51d6 3301
906e58ca
NC		 3302 /* The size in bytes of the section containing glue for VFP11 erratum
3303 veneers. */
3304 bfd_size_type vfp11_erratum_glue_size;
c7b8f16e 3305
a504d23a
LA		 3306 /* The size in bytes of the section containing glue for STM32L4XX erratum
3307 veneers. */
3308 bfd_size_type stm32l4xx_erratum_glue_size;
3309
48229727
JB		 3310 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
3311 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
3312 elf32_arm_write_section(). */
3313 struct a8_erratum_fix *a8_erratum_fixes;
3314 unsigned int num_a8_erratum_fixes;
3315
906e58ca
NC		 3316 /* An arbitrary input BFD chosen to hold the glue sections. */
3317 bfd * bfd_of_glue_owner;
ba96a88f 3318
906e58ca
NC		 3319 /* Nonzero to output a BE8 image. */
3320 int byteswap_code;
e489d0ae 3321
906e58ca
NC		 3322 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
3323 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
3324 int target1_is_rel;
9c504268 3325
906e58ca
NC		 3326 /* The relocation to use for R_ARM_TARGET2 relocations. */
3327 int target2_reloc;
eb043451 3328
906e58ca
NC		 3329 /* 0 = Ignore R_ARM_V4BX.
3330 1 = Convert BX to MOV PC.
3331 2 = Generate v4 interworing stubs. */
3332 int fix_v4bx;
319850b4 3333
48229727
JB		 3334 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
3335 int fix_cortex_a8;
3336
2de70689
MGD		 3337 /* Whether we should fix the ARM1176 BLX immediate issue. */
3338 int fix_arm1176;
3339
906e58ca
NC		 3340 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
3341 int use_blx;
33bfe774 3342
906e58ca
NC		 3343 /* What sort of code sequences we should look for which may trigger the
3344 VFP11 denorm erratum. */
3345 bfd_arm_vfp11_fix vfp11_fix;
c7b8f16e 3346
906e58ca
NC		 3347 /* Global counter for the number of fixes we have emitted. */
3348 int num_vfp11_fixes;
c7b8f16e 3349
a504d23a
LA		 3350 /* What sort of code sequences we should look for which may trigger the
3351 STM32L4XX erratum. */
3352 bfd_arm_stm32l4xx_fix stm32l4xx_fix;
3353
3354 /* Global counter for the number of fixes we have emitted. */
3355 int num_stm32l4xx_fixes;
3356
906e58ca
NC		 3357 /* Nonzero to force PIC branch veneers. */
3358 int pic_veneer;
27e55c4d 3359
906e58ca
NC		 3360 /* The number of bytes in the initial entry in the PLT. */
3361 bfd_size_type plt_header_size;
e5a52504 3362
906e58ca
NC		 3363 /* The number of bytes in the subsequent PLT etries. */
3364 bfd_size_type plt_entry_size;
e5a52504 3365
906e58ca
NC		 3366 /* True if the target system is VxWorks. */
3367 int vxworks_p;
00a97672 3368
906e58ca
NC		 3369 /* True if the target system is Symbian OS. */
3370 int symbian_p;
e5a52504 3371
b38cadfb
NC		 3372 /* True if the target system is Native Client. */
3373 int nacl_p;
3374
906e58ca 3375 /* True if the target uses REL relocations. */
f3185997 3376 bfd_boolean use_rel;
4e7fd91e 3377
54ddd295
TP		 3378 /* Nonzero if import library must be a secure gateway import library
3379 as per ARMv8-M Security Extensions. */
3380 int cmse_implib;
3381
0955507f
TP		 3382 /* The import library whose symbols' address must remain stable in
3383 the import library generated. */
3384 bfd *in_implib_bfd;
3385
0855e32b
NS		 3386 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
3387 bfd_vma next_tls_desc_index;
3388
3389 /* How many R_ARM_TLS_DESC relocations were generated so far. */
3390 bfd_vma num_tls_desc;
3391
906e58ca
NC		 3392 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
3393 asection *srelplt2;
00a97672 3394
0855e32b
NS		 3395 /* The offset into splt of the PLT entry for the TLS descriptor
3396 resolver. Special values are 0, if not necessary (or not found
3397 to be necessary yet), and -1 if needed but not determined
3398 yet. */
3399 bfd_vma dt_tlsdesc_plt;
3400
3401 /* The offset into sgot of the GOT entry used by the PLT entry
3402 above. */
b38cadfb 3403 bfd_vma dt_tlsdesc_got;
0855e32b
NS		 3404
3405 /* Offset in .plt section of tls_arm_trampoline. */
3406 bfd_vma tls_trampoline;
3407
5c5a4843 3408 /* Data for R_ARM_TLS_LDM32/R_ARM_TLS_LDM32_FDPIC relocations. */
906e58ca
NC		 3409 union
3410 {
3411 bfd_signed_vma refcount;
3412 bfd_vma offset;
3413 } tls_ldm_got;
b7693d02 3414
87d72d41
AM		 3415 /* Small local sym cache. */
3416 struct sym_cache sym_cache;
906e58ca
NC		 3417
3418 /* For convenience in allocate_dynrelocs. */
3419 bfd * obfd;
3420
0855e32b
NS		 3421 /* The amount of space used by the reserved portion of the sgotplt
3422 section, plus whatever space is used by the jump slots. */
3423 bfd_vma sgotplt_jump_table_size;
3424
906e58ca
NC		 3425 /* The stub hash table. */
3426 struct bfd_hash_table stub_hash_table;
3427
3428 /* Linker stub bfd. */
3429 bfd *stub_bfd;
3430
3431 /* Linker call-backs. */
6bde4c52
TP		 3432 asection * (*add_stub_section) (const char *, asection *, asection *,
3433 unsigned int);
906e58ca
NC		 3434 void (*layout_sections_again) (void);
3435
3436 /* Array to keep track of which stub sections have been created, and
3437 information on stub grouping. */
21d799b5 3438 struct map_stub *stub_group;
906e58ca 3439
4ba2ef8f
TP		 3440 /* Input stub section holding secure gateway veneers. */
3441 asection *cmse_stub_sec;
3442
0955507f
TP		 3443 /* Offset in cmse_stub_sec where new SG veneers (not in input import library)
3444 start to be allocated. */
3445 bfd_vma new_cmse_stub_offset;
3446
fe33d2fa 3447 /* Number of elements in stub_group. */
7292b3ac 3448 unsigned int top_id;
fe33d2fa 3449
906e58ca
NC		 3450 /* Assorted information used by elf32_arm_size_stubs. */
3451 unsigned int bfd_count;
7292b3ac 3452 unsigned int top_index;
906e58ca 3453 asection **input_list;
617a5ada
CL		 3454
3455 /* True if the target system uses FDPIC. */
3456 int fdpic_p;
e8b09b87
CL		 3457
3458 /* Fixup section. Used for FDPIC. */
3459 asection *srofixup;
906e58ca 3460};
252b5132 3461
e8b09b87
CL		 3462/* Add an FDPIC read-only fixup. */
3463static void
3464arm_elf_add_rofixup (bfd *output_bfd, asection *srofixup, bfd_vma offset)
3465{
3466 bfd_vma fixup_offset;
3467
3468 fixup_offset = srofixup->reloc_count++ * 4;
3469 BFD_ASSERT (fixup_offset < srofixup->size);
3470 bfd_put_32 (output_bfd, offset, srofixup->contents + fixup_offset);
3471}
3472
a504d23a
LA		 3473static inline int
3474ctz (unsigned int mask)
3475{
3476#if GCC_VERSION >= 3004
3477 return __builtin_ctz (mask);
3478#else
3479 unsigned int i;
3480
3481 for (i = 0; i < 8 * sizeof (mask); i++)
3482 {
3483 if (mask & 0x1)
3484 break;
3485 mask = (mask >> 1);
3486 }
3487 return i;
3488#endif
3489}
3490
3491static inline int
b25e998d 3492elf32_arm_popcount (unsigned int mask)
a504d23a
LA		 3493{
3494#if GCC_VERSION >= 3004
3495 return __builtin_popcount (mask);
3496#else
b25e998d
CG		 3497 unsigned int i;
3498 int sum = 0;
a504d23a
LA		 3499
3500 for (i = 0; i < 8 * sizeof (mask); i++)
3501 {
3502 if (mask & 0x1)
3503 sum++;
3504 mask = (mask >> 1);
3505 }
3506 return sum;
3507#endif
3508}
3509
e8b09b87
CL		 3510static void elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info,
3511 asection *sreloc, Elf_Internal_Rela *rel);
3512
3513static void
3514arm_elf_fill_funcdesc(bfd *output_bfd,
3515 struct bfd_link_info *info,
3516 int *funcdesc_offset,
3517 int dynindx,
3518 int offset,
3519 bfd_vma addr,
3520 bfd_vma dynreloc_value,
3521 bfd_vma seg)
3522{
3523 if ((*funcdesc_offset & 1) == 0)
3524 {
3525 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
3526 asection *sgot = globals->root.sgot;
3527
3528 if (bfd_link_pic(info))
3529 {
3530 asection *srelgot = globals->root.srelgot;
3531 Elf_Internal_Rela outrel;
3532
3533 outrel.r_info = ELF32_R_INFO (dynindx, R_ARM_FUNCDESC_VALUE);
3534 outrel.r_offset = sgot->output_section->vma + sgot->output_offset + offset;
3535 outrel.r_addend = 0;
3536
3537 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
3538 bfd_put_32 (output_bfd, addr, sgot->contents + offset);
3539 bfd_put_32 (output_bfd, seg, sgot->contents + offset + 4);
3540 }
3541 else
3542 {
3543 struct elf_link_hash_entry *hgot = globals->root.hgot;
3544 bfd_vma got_value = hgot->root.u.def.value
3545 + hgot->root.u.def.section->output_section->vma
3546 + hgot->root.u.def.section->output_offset;
3547
3548 arm_elf_add_rofixup(output_bfd, globals->srofixup,
3549 sgot->output_section->vma + sgot->output_offset
3550 + offset);
3551 arm_elf_add_rofixup(output_bfd, globals->srofixup,
3552 sgot->output_section->vma + sgot->output_offset
3553 + offset + 4);
3554 bfd_put_32 (output_bfd, dynreloc_value, sgot->contents + offset);
3555 bfd_put_32 (output_bfd, got_value, sgot->contents + offset + 4);
3556 }
3557 *funcdesc_offset |= 1;
3558 }
3559}
3560
780a67af
NC		 3561/* Create an entry in an ARM ELF linker hash table. */
3562
3563static struct bfd_hash_entry *
57e8b36a 3564elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
99059e56
RM		 3565 struct bfd_hash_table * table,
3566 const char * string)
780a67af
NC		 3567{
3568 struct elf32_arm_link_hash_entry * ret =
3569 (struct elf32_arm_link_hash_entry *) entry;
3570
3571 /* Allocate the structure if it has not already been allocated by a
3572 subclass. */
906e58ca 3573 if (ret == NULL)
21d799b5 3574 ret = (struct elf32_arm_link_hash_entry *)
99059e56 3575 bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
57e8b36a 3576 if (ret == NULL)
780a67af
NC		 3577 return (struct bfd_hash_entry *) ret;
3578
3579 /* Call the allocation method of the superclass. */
3580 ret = ((struct elf32_arm_link_hash_entry *)
3581 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3582 table, string));
57e8b36a 3583 if (ret != NULL)
b7693d02 3584 {
0bdcacaf 3585 ret->dyn_relocs = NULL;
ba93b8ac 3586 ret->tls_type = GOT_UNKNOWN;
0855e32b 3587 ret->tlsdesc_got = (bfd_vma) -1;
34e77a92
RS		 3588 ret->plt.thumb_refcount = 0;
3589 ret->plt.maybe_thumb_refcount = 0;
3590 ret->plt.noncall_refcount = 0;
3591 ret->plt.got_offset = -1;
3592 ret->is_iplt = FALSE;
a4fd1a8e 3593 ret->export_glue = NULL;
906e58ca
NC		 3594
3595 ret->stub_cache = NULL;
e8b09b87
CL		 3596
3597 ret->fdpic_cnts.gotofffuncdesc_cnt = 0;
3598 ret->fdpic_cnts.gotfuncdesc_cnt = 0;
3599 ret->fdpic_cnts.funcdesc_cnt = 0;
3600 ret->fdpic_cnts.funcdesc_offset = -1;
3601 ret->fdpic_cnts.gotfuncdesc_offset = -1;
b7693d02 3602 }
780a67af
NC		 3603
3604 return (struct bfd_hash_entry *) ret;
3605}
3606
34e77a92
RS		 3607/* Ensure that we have allocated bookkeeping structures for ABFD's local
3608 symbols. */
3609
3610static bfd_boolean
3611elf32_arm_allocate_local_sym_info (bfd *abfd)
3612{
3613 if (elf_local_got_refcounts (abfd) == NULL)
3614 {
3615 bfd_size_type num_syms;
3616 bfd_size_type size;
3617 char *data;
3618
3619 num_syms = elf_tdata (abfd)->symtab_hdr.sh_info;
3620 size = num_syms * (sizeof (bfd_signed_vma)
3621 + sizeof (struct arm_local_iplt_info *)
3622 + sizeof (bfd_vma)
e8b09b87
CL		 3623 + sizeof (char)
3624 + sizeof (struct fdpic_local));
34e77a92
RS		 3625 data = bfd_zalloc (abfd, size);
3626 if (data == NULL)
3627 return FALSE;
3628
e8b09b87
CL		 3629 elf32_arm_local_fdpic_cnts (abfd) = (struct fdpic_local *) data;
3630 data += num_syms * sizeof (struct fdpic_local);
3631
34e77a92
RS		 3632 elf_local_got_refcounts (abfd) = (bfd_signed_vma *) data;
3633 data += num_syms * sizeof (bfd_signed_vma);
3634
3635 elf32_arm_local_iplt (abfd) = (struct arm_local_iplt_info **) data;
3636 data += num_syms * sizeof (struct arm_local_iplt_info *);
3637
3638 elf32_arm_local_tlsdesc_gotent (abfd) = (bfd_vma *) data;
3639 data += num_syms * sizeof (bfd_vma);
3640
3641 elf32_arm_local_got_tls_type (abfd) = data;
3642 }
3643 return TRUE;
3644}
3645
3646/* Return the .iplt information for local symbol R_SYMNDX, which belongs
3647 to input bfd ABFD. Create the information if it doesn't already exist.
3648 Return null if an allocation fails. */
3649
3650static struct arm_local_iplt_info *
3651elf32_arm_create_local_iplt (bfd *abfd, unsigned long r_symndx)
3652{
3653 struct arm_local_iplt_info **ptr;
3654
3655 if (!elf32_arm_allocate_local_sym_info (abfd))
3656 return NULL;
3657
3658 BFD_ASSERT (r_symndx < elf_tdata (abfd)->symtab_hdr.sh_info);
3659 ptr = &elf32_arm_local_iplt (abfd)[r_symndx];
3660 if (*ptr == NULL)
3661 *ptr = bfd_zalloc (abfd, sizeof (**ptr));
3662 return *ptr;
3663}
3664
3665/* Try to obtain PLT information for the symbol with index R_SYMNDX
3666 in ABFD's symbol table. If the symbol is global, H points to its
3667 hash table entry, otherwise H is null.
3668
3669 Return true if the symbol does have PLT information. When returning
3670 true, point *ROOT_PLT at the target-independent reference count/offset
3671 union and *ARM_PLT at the ARM-specific information. */
3672
3673static bfd_boolean
4ba2ef8f
TP		 3674elf32_arm_get_plt_info (bfd *abfd, struct elf32_arm_link_hash_table *globals,
3675 struct elf32_arm_link_hash_entry *h,
34e77a92
RS		 3676 unsigned long r_symndx, union gotplt_union **root_plt,
3677 struct arm_plt_info **arm_plt)
3678{
3679 struct arm_local_iplt_info *local_iplt;
3680
4ba2ef8f
TP		 3681 if (globals->root.splt == NULL && globals->root.iplt == NULL)
3682 return FALSE;
3683
34e77a92
RS		 3684 if (h != NULL)
3685 {
3686 *root_plt = &h->root.plt;
3687 *arm_plt = &h->plt;
3688 return TRUE;
3689 }
3690
3691 if (elf32_arm_local_iplt (abfd) == NULL)
3692 return FALSE;
3693
3694 local_iplt = elf32_arm_local_iplt (abfd)[r_symndx];
3695 if (local_iplt == NULL)
3696 return FALSE;
3697
3698 *root_plt = &local_iplt->root;
3699 *arm_plt = &local_iplt->arm;
3700 return TRUE;
3701}
3702
59029f57
CL		 3703static bfd_boolean using_thumb_only (struct elf32_arm_link_hash_table *globals);
3704
34e77a92
RS		 3705/* Return true if the PLT described by ARM_PLT requires a Thumb stub
3706 before it. */
3707
3708static bfd_boolean
3709elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info *info,
3710 struct arm_plt_info *arm_plt)
3711{
3712 struct elf32_arm_link_hash_table *htab;
3713
3714 htab = elf32_arm_hash_table (info);
59029f57
CL		 3715
3716 return (!using_thumb_only(htab) && (arm_plt->thumb_refcount != 0
3717 || (!htab->use_blx && arm_plt->maybe_thumb_refcount != 0)));
34e77a92
RS		 3718}
3719
3720/* Return a pointer to the head of the dynamic reloc list that should
3721 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3722 ABFD's symbol table. Return null if an error occurs. */
3723
3724static struct elf_dyn_relocs **
3725elf32_arm_get_local_dynreloc_list (bfd *abfd, unsigned long r_symndx,
3726 Elf_Internal_Sym *isym)
3727{
3728 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3729 {
3730 struct arm_local_iplt_info *local_iplt;
3731
3732 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
3733 if (local_iplt == NULL)
3734 return NULL;
3735 return &local_iplt->dyn_relocs;
3736 }
3737 else
3738 {
3739 /* Track dynamic relocs needed for local syms too.
3740 We really need local syms available to do this
3741 easily. Oh well. */
3742 asection *s;
3743 void *vpp;
3744
3745 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3746 if (s == NULL)
3747 abort ();
3748
3749 vpp = &elf_section_data (s)->local_dynrel;
3750 return (struct elf_dyn_relocs **) vpp;
3751 }
3752}
3753
906e58ca
NC		 3754/* Initialize an entry in the stub hash table. */
3755
3756static struct bfd_hash_entry *
3757stub_hash_newfunc (struct bfd_hash_entry *entry,
3758 struct bfd_hash_table *table,
3759 const char *string)
3760{
3761 /* Allocate the structure if it has not already been allocated by a
3762 subclass. */
3763 if (entry == NULL)
3764 {
21d799b5 3765 entry = (struct bfd_hash_entry *)
99059e56 3766 bfd_hash_allocate (table, sizeof (struct elf32_arm_stub_hash_entry));
906e58ca
NC		 3767 if (entry == NULL)
3768 return entry;
3769 }
3770
3771 /* Call the allocation method of the superclass. */
3772 entry = bfd_hash_newfunc (entry, table, string);
3773 if (entry != NULL)
3774 {
3775 struct elf32_arm_stub_hash_entry *eh;
3776
3777 /* Initialize the local fields. */
3778 eh = (struct elf32_arm_stub_hash_entry *) entry;
3779 eh->stub_sec = NULL;
0955507f 3780 eh->stub_offset = (bfd_vma) -1;
8d9d9490 3781 eh->source_value = 0;
906e58ca
NC		 3782 eh->target_value = 0;
3783 eh->target_section = NULL;
cedfb179 3784 eh->orig_insn = 0;
906e58ca 3785 eh->stub_type = arm_stub_none;
461a49ca
DJ		 3786 eh->stub_size = 0;
3787 eh->stub_template = NULL;
0955507f 3788 eh->stub_template_size = -1;
906e58ca
NC		 3789 eh->h = NULL;
3790 eh->id_sec = NULL;
d8d2f433 3791 eh->output_name = NULL;
906e58ca
NC		 3792 }
3793
3794 return entry;
3795}
3796
00a97672 3797/* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
5e681ec4
PB		 3798 shortcuts to them in our hash table. */
3799
3800static bfd_boolean
57e8b36a 3801create_got_section (bfd *dynobj, struct bfd_link_info *info)
5e681ec4
PB		 3802{
3803 struct elf32_arm_link_hash_table *htab;
3804
e5a52504 3805 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 3806 if (htab == NULL)
3807 return FALSE;
3808
e5a52504
MM		 3809 /* BPABI objects never have a GOT, or associated sections. */
3810 if (htab->symbian_p)
3811 return TRUE;
3812
5e681ec4
PB		 3813 if (! _bfd_elf_create_got_section (dynobj, info))
3814 return FALSE;
3815
e8b09b87
CL		 3816 /* Also create .rofixup. */
3817 if (htab->fdpic_p)
3818 {
3819 htab->srofixup = bfd_make_section_with_flags (dynobj, ".rofixup",
3820 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3821 | SEC_IN_MEMORY | SEC_LINKER_CREATED | SEC_READONLY));
fd361982
AM		 3822 if (htab->srofixup == NULL
3823 || !bfd_set_section_alignment (htab->srofixup, 2))
e8b09b87
CL		 3824 return FALSE;
3825 }
3826
5e681ec4
PB		 3827 return TRUE;
3828}
3829
34e77a92
RS		 3830/* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3831
3832static bfd_boolean
3833create_ifunc_sections (struct bfd_link_info *info)
3834{
3835 struct elf32_arm_link_hash_table *htab;
3836 const struct elf_backend_data *bed;
3837 bfd *dynobj;
3838 asection *s;
3839 flagword flags;
b38cadfb 3840
34e77a92
RS		 3841 htab = elf32_arm_hash_table (info);
3842 dynobj = htab->root.dynobj;
3843 bed = get_elf_backend_data (dynobj);
3844 flags = bed->dynamic_sec_flags;
3845
3846 if (htab->root.iplt == NULL)
3847 {
3d4d4302
AM		 3848 s = bfd_make_section_anyway_with_flags (dynobj, ".iplt",
3849 flags | SEC_READONLY | SEC_CODE);
34e77a92 3850 if (s == NULL
fd361982 3851 || !bfd_set_section_alignment (s, bed->plt_alignment))
34e77a92
RS		 3852 return FALSE;
3853 htab->root.iplt = s;
3854 }
3855
3856 if (htab->root.irelplt == NULL)
3857 {
3d4d4302
AM		 3858 s = bfd_make_section_anyway_with_flags (dynobj,
3859 RELOC_SECTION (htab, ".iplt"),
3860 flags | SEC_READONLY);
34e77a92 3861 if (s == NULL
fd361982 3862 || !bfd_set_section_alignment (s, bed->s->log_file_align))
34e77a92
RS		 3863 return FALSE;
3864 htab->root.irelplt = s;
3865 }
3866
3867 if (htab->root.igotplt == NULL)
3868 {
3d4d4302 3869 s = bfd_make_section_anyway_with_flags (dynobj, ".igot.plt", flags);
34e77a92 3870 if (s == NULL
fd361982 3871 || !bfd_set_section_alignment (s, bed->s->log_file_align))
34e77a92
RS		 3872 return FALSE;
3873 htab->root.igotplt = s;
3874 }
3875 return TRUE;
3876}
3877
eed94f8f
NC		 3878/* Determine if we're dealing with a Thumb only architecture. */
3879
3880static bfd_boolean
3881using_thumb_only (struct elf32_arm_link_hash_table *globals)
3882{
2fd158eb
TP		 3883 int arch;
3884 int profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3885 Tag_CPU_arch_profile);
eed94f8f 3886
2fd158eb
TP		 3887 if (profile)
3888 return profile == 'M';
eed94f8f 3889
2fd158eb 3890 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
eed94f8f 3891
60a019a0 3892 /* Force return logic to be reviewed for each new architecture. */
031254f2 3893 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8_1M_MAIN);
60a019a0 3894
2fd158eb
TP		 3895 if (arch == TAG_CPU_ARCH_V6_M
3896 || arch == TAG_CPU_ARCH_V6S_M
3897 || arch == TAG_CPU_ARCH_V7E_M
3898 || arch == TAG_CPU_ARCH_V8M_BASE
031254f2
AV		 3899 || arch == TAG_CPU_ARCH_V8M_MAIN
3900 || arch == TAG_CPU_ARCH_V8_1M_MAIN)
2fd158eb 3901 return TRUE;
eed94f8f 3902
2fd158eb 3903 return FALSE;
eed94f8f
NC		 3904}
3905
3906/* Determine if we're dealing with a Thumb-2 object. */
3907
3908static bfd_boolean
3909using_thumb2 (struct elf32_arm_link_hash_table *globals)
3910{
60a019a0
TP		 3911 int arch;
3912 int thumb_isa = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3913 Tag_THUMB_ISA_use);
3914
3915 if (thumb_isa)
3916 return thumb_isa == 2;
3917
3918 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3919
3920 /* Force return logic to be reviewed for each new architecture. */
031254f2 3921 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8_1M_MAIN);
60a019a0
TP		 3922
3923 return (arch == TAG_CPU_ARCH_V6T2
3924 || arch == TAG_CPU_ARCH_V7
3925 || arch == TAG_CPU_ARCH_V7E_M
3926 || arch == TAG_CPU_ARCH_V8
bff0500d 3927 || arch == TAG_CPU_ARCH_V8R
031254f2
AV		 3928 || arch == TAG_CPU_ARCH_V8M_MAIN
3929 || arch == TAG_CPU_ARCH_V8_1M_MAIN);
eed94f8f
NC		 3930}
3931
5e866f5a
TP		 3932/* Determine whether Thumb-2 BL instruction is available. */
3933
3934static bfd_boolean
3935using_thumb2_bl (struct elf32_arm_link_hash_table *globals)
3936{
3937 int arch =
3938 bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3939
3940 /* Force return logic to be reviewed for each new architecture. */
031254f2 3941 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8_1M_MAIN);
5e866f5a
TP		 3942
3943 /* Architecture was introduced after ARMv6T2 (eg. ARMv6-M). */
3944 return (arch == TAG_CPU_ARCH_V6T2
3945 || arch >= TAG_CPU_ARCH_V7);
3946}
3947
00a97672
RS		 3948/* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3949 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
5e681ec4
PB		 3950 hash table. */
3951
3952static bfd_boolean
57e8b36a 3953elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
5e681ec4
PB		 3954{
3955 struct elf32_arm_link_hash_table *htab;
3956
3957 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 3958 if (htab == NULL)
3959 return FALSE;
3960
362d30a1 3961 if (!htab->root.sgot && !create_got_section (dynobj, info))
5e681ec4
PB		 3962 return FALSE;
3963
3964 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3965 return FALSE;
3966
00a97672
RS		 3967 if (htab->vxworks_p)
3968 {
3969 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
3970 return FALSE;
3971
0e1862bb 3972 if (bfd_link_pic (info))
00a97672
RS		 3973 {
3974 htab->plt_header_size = 0;
3975 htab->plt_entry_size
3976 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
3977 }
3978 else
3979 {
3980 htab->plt_header_size
3981 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
3982 htab->plt_entry_size
3983 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
3984 }
aebf9be7
NC		 3985
3986 if (elf_elfheader (dynobj))
3987 elf_elfheader (dynobj)->e_ident[EI_CLASS] = ELFCLASS32;
00a97672 3988 }
eed94f8f
NC		 3989 else
3990 {
3991 /* PR ld/16017
3992 Test for thumb only architectures. Note - we cannot just call
3993 using_thumb_only() as the attributes in the output bfd have not been
3994 initialised at this point, so instead we use the input bfd. */
3995 bfd * saved_obfd = htab->obfd;
3996
3997 htab->obfd = dynobj;
3998 if (using_thumb_only (htab))
3999 {
4000 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
4001 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
4002 }
4003 htab->obfd = saved_obfd;
4004 }
5e681ec4 4005
7801f98f
CL		 4006 if (htab->fdpic_p) {
4007 htab->plt_header_size = 0;
4008 if (info->flags & DF_BIND_NOW)
4009 htab->plt_entry_size = 4 * (ARRAY_SIZE(elf32_arm_fdpic_plt_entry) - 5);
4010 else
4011 htab->plt_entry_size = 4 * ARRAY_SIZE(elf32_arm_fdpic_plt_entry);
4012 }
4013
362d30a1
RS		 4014 if (!htab->root.splt
4015 || !htab->root.srelplt
9d19e4fd
AM		 4016 || !htab->root.sdynbss
4017 || (!bfd_link_pic (info) && !htab->root.srelbss))
5e681ec4
PB		 4018 abort ();
4019
4020 return TRUE;
4021}
4022
906e58ca
NC		 4023/* Copy the extra info we tack onto an elf_link_hash_entry. */
4024
4025static void
4026elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
4027 struct elf_link_hash_entry *dir,
4028 struct elf_link_hash_entry *ind)
4029{
4030 struct elf32_arm_link_hash_entry *edir, *eind;
4031
4032 edir = (struct elf32_arm_link_hash_entry *) dir;
4033 eind = (struct elf32_arm_link_hash_entry *) ind;
4034
0bdcacaf 4035 if (eind->dyn_relocs != NULL)
906e58ca 4036 {
0bdcacaf 4037 if (edir->dyn_relocs != NULL)
906e58ca 4038 {
0bdcacaf
RS		 4039 struct elf_dyn_relocs **pp;
4040 struct elf_dyn_relocs *p;
906e58ca
NC		 4041
4042 /* Add reloc counts against the indirect sym to the direct sym
4043 list. Merge any entries against the same section. */
0bdcacaf 4044 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
906e58ca 4045 {
0bdcacaf 4046 struct elf_dyn_relocs *q;
906e58ca 4047
0bdcacaf
RS		 4048 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4049 if (q->sec == p->sec)
906e58ca
NC		 4050 {
4051 q->pc_count += p->pc_count;
4052 q->count += p->count;
4053 *pp = p->next;
4054 break;
4055 }
4056 if (q == NULL)
4057 pp = &p->next;
4058 }
0bdcacaf 4059 *pp = edir->dyn_relocs;
906e58ca
NC		 4060 }
4061
0bdcacaf
RS		 4062 edir->dyn_relocs = eind->dyn_relocs;
4063 eind->dyn_relocs = NULL;
906e58ca
NC		 4064 }
4065
4066 if (ind->root.type == bfd_link_hash_indirect)
4067 {
4068 /* Copy over PLT info. */
34e77a92
RS		 4069 edir->plt.thumb_refcount += eind->plt.thumb_refcount;
4070 eind->plt.thumb_refcount = 0;
4071 edir->plt.maybe_thumb_refcount += eind->plt.maybe_thumb_refcount;
4072 eind->plt.maybe_thumb_refcount = 0;
4073 edir->plt.noncall_refcount += eind->plt.noncall_refcount;
4074 eind->plt.noncall_refcount = 0;
4075
e8b09b87
CL		 4076 /* Copy FDPIC counters. */
4077 edir->fdpic_cnts.gotofffuncdesc_cnt += eind->fdpic_cnts.gotofffuncdesc_cnt;
4078 edir->fdpic_cnts.gotfuncdesc_cnt += eind->fdpic_cnts.gotfuncdesc_cnt;
4079 edir->fdpic_cnts.funcdesc_cnt += eind->fdpic_cnts.funcdesc_cnt;
4080
34e77a92
RS		 4081 /* We should only allocate a function to .iplt once the final
4082 symbol information is known. */
4083 BFD_ASSERT (!eind->is_iplt);
906e58ca
NC		 4084
4085 if (dir->got.refcount <= 0)
4086 {
4087 edir->tls_type = eind->tls_type;
4088 eind->tls_type = GOT_UNKNOWN;
4089 }
4090 }
4091
4092 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
4093}
4094
68faa637
AM		 4095/* Destroy an ARM elf linker hash table. */
4096
4097static void
d495ab0d 4098elf32_arm_link_hash_table_free (bfd *obfd)
68faa637
AM		 4099{
4100 struct elf32_arm_link_hash_table *ret
d495ab0d 4101 = (struct elf32_arm_link_hash_table *) obfd->link.hash;
68faa637
AM		 4102
4103 bfd_hash_table_free (&ret->stub_hash_table);
d495ab0d 4104 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 4105}
4106
906e58ca
NC		 4107/* Create an ARM elf linker hash table. */
4108
4109static struct bfd_link_hash_table *
4110elf32_arm_link_hash_table_create (bfd *abfd)
4111{
4112 struct elf32_arm_link_hash_table *ret;
986f0783 4113 size_t amt = sizeof (struct elf32_arm_link_hash_table);
906e58ca 4114
7bf52ea2 4115 ret = (struct elf32_arm_link_hash_table *) bfd_zmalloc (amt);
906e58ca
NC		 4116 if (ret == NULL)
4117 return NULL;
4118
4119 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
4120 elf32_arm_link_hash_newfunc,
4dfe6ac6
NC		 4121 sizeof (struct elf32_arm_link_hash_entry),
4122 ARM_ELF_DATA))
906e58ca
NC		 4123 {
4124 free (ret);
4125 return NULL;
4126 }
4127
906e58ca 4128 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
a504d23a 4129 ret->stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
906e58ca
NC		 4130#ifdef FOUR_WORD_PLT
4131 ret->plt_header_size = 16;
4132 ret->plt_entry_size = 16;
4133#else
4134 ret->plt_header_size = 20;
1db37fe6 4135 ret->plt_entry_size = elf32_arm_use_long_plt_entry ? 16 : 12;
906e58ca 4136#endif
f3185997 4137 ret->use_rel = TRUE;
906e58ca 4138 ret->obfd = abfd;
617a5ada 4139 ret->fdpic_p = 0;
906e58ca
NC		 4140
4141 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
4142 sizeof (struct elf32_arm_stub_hash_entry)))
4143 {
d495ab0d 4144 _bfd_elf_link_hash_table_free (abfd);
906e58ca
NC		 4145 return NULL;
4146 }
d495ab0d 4147 ret->root.root.hash_table_free = elf32_arm_link_hash_table_free;
906e58ca
NC		 4148
4149 return &ret->root.root;
4150}
4151
cd1dac3d
DG		 4152/* Determine what kind of NOPs are available. */
4153
4154static bfd_boolean
4155arch_has_arm_nop (struct elf32_arm_link_hash_table *globals)
4156{
4157 const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4158 Tag_CPU_arch);
cd1dac3d 4159
60a019a0 4160 /* Force return logic to be reviewed for each new architecture. */
031254f2 4161 BFD_ASSERT (arch <= TAG_CPU_ARCH_V8_1M_MAIN);
60a019a0
TP		 4162
4163 return (arch == TAG_CPU_ARCH_V6T2
4164 || arch == TAG_CPU_ARCH_V6K
4165 || arch == TAG_CPU_ARCH_V7
bff0500d
TP		 4166 || arch == TAG_CPU_ARCH_V8
4167 || arch == TAG_CPU_ARCH_V8R);
cd1dac3d
DG		 4168}
4169
f4ac8484
DJ		 4170static bfd_boolean
4171arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
4172{
4173 switch (stub_type)
4174 {
fea2b4d6 4175 case arm_stub_long_branch_thumb_only:
80c135e5 4176 case arm_stub_long_branch_thumb2_only:
d5a67c02 4177 case arm_stub_long_branch_thumb2_only_pure:
fea2b4d6
CL		 4178 case arm_stub_long_branch_v4t_thumb_arm:
4179 case arm_stub_short_branch_v4t_thumb_arm:
ebe24dd4 4180 case arm_stub_long_branch_v4t_thumb_arm_pic:
12352d3f 4181 case arm_stub_long_branch_v4t_thumb_tls_pic:
ebe24dd4 4182 case arm_stub_long_branch_thumb_only_pic:
4ba2ef8f 4183 case arm_stub_cmse_branch_thumb_only:
f4ac8484
DJ		 4184 return TRUE;
4185 case arm_stub_none:
4186 BFD_FAIL ();
4187 return FALSE;
4188 break;
4189 default:
4190 return FALSE;
4191 }
4192}
4193
906e58ca
NC		 4194/* Determine the type of stub needed, if any, for a call. */
4195
4196static enum elf32_arm_stub_type
4197arm_type_of_stub (struct bfd_link_info *info,
4198 asection *input_sec,
4199 const Elf_Internal_Rela *rel,
34e77a92 4200 unsigned char st_type,
35fc36a8 4201 enum arm_st_branch_type *actual_branch_type,
906e58ca 4202 struct elf32_arm_link_hash_entry *hash,
c820be07
NC		 4203 bfd_vma destination,
4204 asection *sym_sec,
4205 bfd *input_bfd,
4206 const char *name)
906e58ca
NC		 4207{
4208 bfd_vma location;
4209 bfd_signed_vma branch_offset;
4210 unsigned int r_type;
4211 struct elf32_arm_link_hash_table * globals;
5e866f5a 4212 bfd_boolean thumb2, thumb2_bl, thumb_only;
906e58ca 4213 enum elf32_arm_stub_type stub_type = arm_stub_none;
5fa9e92f 4214 int use_plt = 0;
35fc36a8 4215 enum arm_st_branch_type branch_type = *actual_branch_type;
34e77a92
RS		 4216 union gotplt_union *root_plt;
4217 struct arm_plt_info *arm_plt;
d5a67c02
AV		 4218 int arch;
4219 int thumb2_movw;
906e58ca 4220
35fc36a8 4221 if (branch_type == ST_BRANCH_LONG)
da5938a2
NC		 4222 return stub_type;
4223
906e58ca 4224 globals = elf32_arm_hash_table (info);
4dfe6ac6
NC		 4225 if (globals == NULL)
4226 return stub_type;
906e58ca
NC		 4227
4228 thumb_only = using_thumb_only (globals);
906e58ca 4229 thumb2 = using_thumb2 (globals);
5e866f5a 4230 thumb2_bl = using_thumb2_bl (globals);
906e58ca 4231
d5a67c02
AV		 4232 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
4233
4234 /* True for architectures that implement the thumb2 movw instruction. */
4235 thumb2_movw = thumb2 || (arch == TAG_CPU_ARCH_V8M_BASE);
4236
906e58ca
NC		 4237 /* Determine where the call point is. */
4238 location = (input_sec->output_offset
4239 + input_sec->output_section->vma
4240 + rel->r_offset);
4241
906e58ca
NC		 4242 r_type = ELF32_R_TYPE (rel->r_info);
4243
39f21624
NC		 4244 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
4245 are considering a function call relocation. */
c5423981 4246 if (thumb_only && (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
07d6d2b8 4247 || r_type == R_ARM_THM_JUMP19)
39f21624
NC		 4248 && branch_type == ST_BRANCH_TO_ARM)
4249 branch_type = ST_BRANCH_TO_THUMB;
4250
34e77a92
RS		 4251 /* For TLS call relocs, it is the caller's responsibility to provide
4252 the address of the appropriate trampoline. */
4253 if (r_type != R_ARM_TLS_CALL
4254 && r_type != R_ARM_THM_TLS_CALL
4ba2ef8f
TP		 4255 && elf32_arm_get_plt_info (input_bfd, globals, hash,
4256 ELF32_R_SYM (rel->r_info), &root_plt,
4257 &arm_plt)
34e77a92 4258 && root_plt->offset != (bfd_vma) -1)
5fa9e92f 4259 {
34e77a92 4260 asection *splt;
fe33d2fa 4261
34e77a92
RS		 4262 if (hash == NULL || hash->is_iplt)
4263 splt = globals->root.iplt;
4264 else
4265 splt = globals->root.splt;
4266 if (splt != NULL)
b38cadfb 4267 {
34e77a92
RS		 4268 use_plt = 1;
4269
4270 /* Note when dealing with PLT entries: the main PLT stub is in
4271 ARM mode, so if the branch is in Thumb mode, another
4272 Thumb->ARM stub will be inserted later just before the ARM
2df2751d
CL		 4273 PLT stub. If a long branch stub is needed, we'll add a
4274 Thumb->Arm one and branch directly to the ARM PLT entry.
4275 Here, we have to check if a pre-PLT Thumb->ARM stub
4276 is needed and if it will be close enough. */
34e77a92
RS		 4277
4278 destination = (splt->output_section->vma
4279 + splt->output_offset
4280 + root_plt->offset);
4281 st_type = STT_FUNC;
2df2751d
CL		 4282
4283 /* Thumb branch/call to PLT: it can become a branch to ARM
4284 or to Thumb. We must perform the same checks and
4285 corrections as in elf32_arm_final_link_relocate. */
4286 if ((r_type == R_ARM_THM_CALL)
4287 || (r_type == R_ARM_THM_JUMP24))
4288 {
4289 if (globals->use_blx
4290 && r_type == R_ARM_THM_CALL
4291 && !thumb_only)
4292 {
4293 /* If the Thumb BLX instruction is available, convert
4294 the BL to a BLX instruction to call the ARM-mode
4295 PLT entry. */
4296 branch_type = ST_BRANCH_TO_ARM;
4297 }
4298 else
4299 {
4300 if (!thumb_only)
4301 /* Target the Thumb stub before the ARM PLT entry. */
4302 destination -= PLT_THUMB_STUB_SIZE;
4303 branch_type = ST_BRANCH_TO_THUMB;
4304 }
4305 }
4306 else
4307 {
4308 branch_type = ST_BRANCH_TO_ARM;
4309 }
34e77a92 4310 }
5fa9e92f 4311 }
34e77a92
RS		 4312 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
4313 BFD_ASSERT (st_type != STT_GNU_IFUNC);
906e58ca 4314
fe33d2fa
CL		 4315 branch_offset = (bfd_signed_vma)(destination - location);
4316
0855e32b 4317 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
c5423981 4318 || r_type == R_ARM_THM_TLS_CALL || r_type == R_ARM_THM_JUMP19)
906e58ca 4319 {
5fa9e92f
CL		 4320 /* Handle cases where:
4321 - this call goes too far (different Thumb/Thumb2 max
99059e56 4322 distance)
155d87d7 4323 - it's a Thumb->Arm call and blx is not available, or it's a
99059e56
RM		 4324 Thumb->Arm branch (not bl). A stub is needed in this case,
4325 but only if this call is not through a PLT entry. Indeed,
695344c0 4326 PLT stubs handle mode switching already. */
5e866f5a 4327 if ((!thumb2_bl
906e58ca
NC		 4328 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
4329 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
5e866f5a 4330 || (thumb2_bl
906e58ca
NC		 4331 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
4332 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
c5423981
TG		 4333 || (thumb2
4334 && (branch_offset > THM2_MAX_FWD_COND_BRANCH_OFFSET
4335 || (branch_offset < THM2_MAX_BWD_COND_BRANCH_OFFSET))
4336 && (r_type == R_ARM_THM_JUMP19))
35fc36a8 4337 || (branch_type == ST_BRANCH_TO_ARM
0855e32b
NS		 4338 && (((r_type == R_ARM_THM_CALL
4339 || r_type == R_ARM_THM_TLS_CALL) && !globals->use_blx)
c5423981 4340 || (r_type == R_ARM_THM_JUMP24)
07d6d2b8 4341 || (r_type == R_ARM_THM_JUMP19))
5fa9e92f 4342 && !use_plt))
906e58ca 4343 {
2df2751d
CL		 4344 /* If we need to insert a Thumb-Thumb long branch stub to a
4345 PLT, use one that branches directly to the ARM PLT
4346 stub. If we pretended we'd use the pre-PLT Thumb->ARM
4347 stub, undo this now. */
695344c0
NC		 4348 if ((branch_type == ST_BRANCH_TO_THUMB) && use_plt && !thumb_only)
4349 {
4350 branch_type = ST_BRANCH_TO_ARM;
4351 branch_offset += PLT_THUMB_STUB_SIZE;
4352 }
2df2751d 4353
35fc36a8 4354 if (branch_type == ST_BRANCH_TO_THUMB)
906e58ca
NC		 4355 {
4356 /* Thumb to thumb. */
4357 if (!thumb_only)
4358 {
d5a67c02 4359 if (input_sec->flags & SEC_ELF_PURECODE)
10463f39 4360 _bfd_error_handler
871b3ab2 4361 (_("%pB(%pA): warning: long branch veneers used in"
10463f39
AM		 4362 " section with SHF_ARM_PURECODE section"
4363 " attribute is only supported for M-profile"
90b6238f 4364 " targets that implement the movw instruction"),
10463f39 4365 input_bfd, input_sec);
d5a67c02 4366
0e1862bb 4367 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
c2b4a39d 4368 /* PIC stubs. */
155d87d7 4369 ? ((globals->use_blx
9553db3c 4370 && (r_type == R_ARM_THM_CALL))
155d87d7
CL		 4371 /* V5T and above. Stub starts with ARM code, so
4372 we must be able to switch mode before
4373 reaching it, which is only possible for 'bl'
4374 (ie R_ARM_THM_CALL relocation). */
cf3eccff 4375 ? arm_stub_long_branch_any_thumb_pic
ebe24dd4 4376 /* On V4T, use Thumb code only. */
d3626fb0 4377 : arm_stub_long_branch_v4t_thumb_thumb_pic)
c2b4a39d
CL		 4378
4379 /* non-PIC stubs. */
155d87d7 4380 : ((globals->use_blx
9553db3c 4381 && (r_type == R_ARM_THM_CALL))
c2b4a39d
CL		 4382 /* V5T and above. */
4383 ? arm_stub_long_branch_any_any
4384 /* V4T. */
d3626fb0 4385 : arm_stub_long_branch_v4t_thumb_thumb);
906e58ca
NC		 4386 }
4387 else
4388 {
d5a67c02
AV		 4389 if (thumb2_movw && (input_sec->flags & SEC_ELF_PURECODE))
4390 stub_type = arm_stub_long_branch_thumb2_only_pure;
4391 else
4392 {
4393 if (input_sec->flags & SEC_ELF_PURECODE)
10463f39 4394 _bfd_error_handler
871b3ab2 4395 (_("%pB(%pA): warning: long branch veneers used in"
10463f39
AM		 4396 " section with SHF_ARM_PURECODE section"
4397 " attribute is only supported for M-profile"
90b6238f 4398 " targets that implement the movw instruction"),
10463f39 4399 input_bfd, input_sec);
d5a67c02
AV		 4400
4401 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
4402 /* PIC stub. */
4403 ? arm_stub_long_branch_thumb_only_pic
4404 /* non-PIC stub. */
4405 : (thumb2 ? arm_stub_long_branch_thumb2_only
4406 : arm_stub_long_branch_thumb_only);
4407 }
906e58ca
NC		 4408 }
4409 }
4410 else
4411 {
d5a67c02 4412 if (input_sec->flags & SEC_ELF_PURECODE)
10463f39 4413 _bfd_error_handler
871b3ab2 4414 (_("%pB(%pA): warning: long branch veneers used in"
10463f39
AM		 4415 " section with SHF_ARM_PURECODE section"
4416 " attribute is only supported" " for M-profile"
90b6238f 4417 " targets that implement the movw instruction"),
10463f39 4418 input_bfd, input_sec);
d5a67c02 4419
906e58ca 4420 /* Thumb to arm. */
c820be07
NC		 4421 if (sym_sec != NULL
4422 && sym_sec->owner != NULL
4423 && !INTERWORK_FLAG (sym_sec->owner))
4424 {
4eca0228 4425 _bfd_error_handler
90b6238f
AM		 4426 (_("%pB(%s): warning: interworking not enabled;"
4427 " first occurrence: %pB: %s call to %s"),
4428 sym_sec->owner, name, input_bfd, "Thumb", "ARM");
c820be07
NC		 4429 }
4430
0855e32b 4431 stub_type =
0e1862bb 4432 (bfd_link_pic (info) | globals->pic_veneer)
c2b4a39d 4433 /* PIC stubs. */
0855e32b 4434 ? (r_type == R_ARM_THM_TLS_CALL
6a631e86 4435 /* TLS PIC stubs. */
0855e32b
NS		 4436 ? (globals->use_blx ? arm_stub_long_branch_any_tls_pic
4437 : arm_stub_long_branch_v4t_thumb_tls_pic)
4438 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
4439 /* V5T PIC and above. */
4440 ? arm_stub_long_branch_any_arm_pic
4441 /* V4T PIC stub. */
4442 : arm_stub_long_branch_v4t_thumb_arm_pic))
c2b4a39d
CL		 4443
4444 /* non-PIC stubs. */
0855e32b 4445 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
c2b4a39d
CL		 4446 /* V5T and above. */
4447 ? arm_stub_long_branch_any_any
4448 /* V4T. */
4449 : arm_stub_long_branch_v4t_thumb_arm);
c820be07
NC		 4450
4451 /* Handle v4t short branches. */
fea2b4d6 4452 if ((stub_type == arm_stub_long_branch_v4t_thumb_arm)
c820be07
NC		 4453 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
4454 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
fea2b4d6 4455 stub_type = arm_stub_short_branch_v4t_thumb_arm;
906e58ca
NC		 4456 }
4457 }
4458 }
fe33d2fa
CL		 4459 else if (r_type == R_ARM_CALL
4460 || r_type == R_ARM_JUMP24
0855e32b
NS		 4461 || r_type == R_ARM_PLT32
4462 || r_type == R_ARM_TLS_CALL)
906e58ca 4463 {
d5a67c02 4464 if (input_sec->flags & SEC_ELF_PURECODE)
10463f39 4465 _bfd_error_handler
871b3ab2 4466 (_("%pB(%pA): warning: long branch veneers used in"
10463f39
AM		 4467 " section with SHF_ARM_PURECODE section"
4468 " attribute is only supported for M-profile"
90b6238f 4469 " targets that implement the movw instruction"),
10463f39 4470 input_bfd, input_sec);
35fc36a8 4471 if (branch_type == ST_BRANCH_TO_THUMB)
906e58ca
NC		 4472 {
4473 /* Arm to thumb. */
c820be07
NC		 4474
4475 if (sym_sec != NULL
4476 && sym_sec->owner != NULL
4477 && !INTERWORK_FLAG (sym_sec->owner))
4478 {
4eca0228 4479 _bfd_error_handler
90b6238f
AM		 4480 (_("%pB(%s): warning: interworking not enabled;"
4481 " first occurrence: %pB: %s call to %s"),
4482 sym_sec->owner, name, input_bfd, "ARM", "Thumb");
c820be07
NC		 4483 }
4484
4485 /* We have an extra 2-bytes reach because of
4486 the mode change (bit 24 (H) of BLX encoding). */
4116d8d7
PB		 4487 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
4488 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
0855e32b 4489 || (r_type == R_ARM_CALL && !globals->use_blx)
4116d8d7
PB		 4490 || (r_type == R_ARM_JUMP24)
4491 || (r_type == R_ARM_PLT32))
906e58ca 4492 {
0e1862bb 4493 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
c2b4a39d 4494 /* PIC stubs. */
ebe24dd4
CL		 4495 ? ((globals->use_blx)
4496 /* V5T and above. */
4497 ? arm_stub_long_branch_any_thumb_pic
4498 /* V4T stub. */
4499 : arm_stub_long_branch_v4t_arm_thumb_pic)
4500
c2b4a39d
CL		 4501 /* non-PIC stubs. */
4502 : ((globals->use_blx)
4503 /* V5T and above. */
4504 ? arm_stub_long_branch_any_any
4505 /* V4T. */
4506 : arm_stub_long_branch_v4t_arm_thumb);
906e58ca
NC		 4507 }
4508 }
4509 else
4510 {
4511 /* Arm to arm. */
4512 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
4513 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
4514 {
0855e32b 4515 stub_type =
0e1862bb 4516 (bfd_link_pic (info) | globals->pic_veneer)
c2b4a39d 4517 /* PIC stubs. */
0855e32b 4518 ? (r_type == R_ARM_TLS_CALL
6a631e86 4519 /* TLS PIC Stub. */
0855e32b 4520 ? arm_stub_long_branch_any_tls_pic
7a89b94e
NC		 4521 : (globals->nacl_p
4522 ? arm_stub_long_branch_arm_nacl_pic
4523 : arm_stub_long_branch_any_arm_pic))
c2b4a39d 4524 /* non-PIC stubs. */
7a89b94e
NC		 4525 : (globals->nacl_p
4526 ? arm_stub_long_branch_arm_nacl
4527 : arm_stub_long_branch_any_any);
906e58ca
NC		 4528 }
4529 }
4530 }
4531
fe33d2fa
CL		 4532 /* If a stub is needed, record the actual destination type. */
4533 if (stub_type != arm_stub_none)
35fc36a8 4534 *actual_branch_type = branch_type;
fe33d2fa 4535
906e58ca
NC		 4536 return stub_type;
4537}
4538
4539/* Build a name for an entry in the stub hash table. */
4540
4541static char *
4542elf32_arm_stub_name (const asection *input_section,
4543 const asection *sym_sec,
4544 const struct elf32_arm_link_hash_entry *hash,
fe33d2fa
CL		 4545 const Elf_Internal_Rela *rel,
4546 enum elf32_arm_stub_type stub_type)
906e58ca
NC		 4547{
4548 char *stub_name;
4549 bfd_size_type len;
4550
4551 if (hash)
4552 {
fe33d2fa 4553 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1 + 2 + 1;
21d799b5 4554 stub_name = (char *) bfd_malloc (len);
906e58ca 4555 if (stub_name != NULL)
fe33d2fa 4556 sprintf (stub_name, "%08x_%s+%x_%d",
906e58ca
NC		 4557 input_section->id & 0xffffffff,
4558 hash->root.root.root.string,
fe33d2fa
CL		 4559 (int) rel->r_addend & 0xffffffff,
4560 (int) stub_type);
906e58ca
NC		 4561 }
4562 else
4563 {
fe33d2fa 4564 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
21d799b5 4565 stub_name = (char *) bfd_malloc (len);
906e58ca 4566 if (stub_name != NULL)
fe33d2fa 4567 sprintf (stub_name, "%08x_%x:%x+%x_%d",
906e58ca
NC		 4568 input_section->id & 0xffffffff,
4569 sym_sec->id & 0xffffffff,
0855e32b
NS		 4570 ELF32_R_TYPE (rel->r_info) == R_ARM_TLS_CALL
4571 || ELF32_R_TYPE (rel->r_info) == R_ARM_THM_TLS_CALL
4572 ? 0 : (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
fe33d2fa
CL		 4573 (int) rel->r_addend & 0xffffffff,
4574 (int) stub_type);
906e58ca
NC		 4575 }
4576
4577 return stub_name;
4578}
4579
4580/* Look up an entry in the stub hash. Stub entries are cached because
4581 creating the stub name takes a bit of time. */
4582
4583static struct elf32_arm_stub_hash_entry *
4584elf32_arm_get_stub_entry (const asection *input_section,
4585 const asection *sym_sec,
4586 struct elf_link_hash_entry *hash,
4587 const Elf_Internal_Rela *rel,
fe33d2fa
CL		 4588 struct elf32_arm_link_hash_table *htab,
4589 enum elf32_arm_stub_type stub_type)
906e58ca
NC		 4590{
4591 struct elf32_arm_stub_hash_entry *stub_entry;
4592 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
4593 const asection *id_sec;
4594
4595 if ((input_section->flags & SEC_CODE) == 0)
4596 return NULL;
4597
4d83e8d9
CL		 4598 /* If the input section is the CMSE stubs one and it needs a long
4599 branch stub to reach it's final destination, give up with an
4600 error message: this is not supported. See PR ld/24709. */
4601 if (!strncmp (input_section->name, CMSE_STUB_NAME, strlen(CMSE_STUB_NAME)))
4602 {
4603 bfd *output_bfd = htab->obfd;
4604 asection *out_sec = bfd_get_section_by_name (output_bfd, CMSE_STUB_NAME);
4605
4606 _bfd_error_handler (_("ERROR: CMSE stub (%s section) too far "
4607 "(%#" PRIx64 ") from destination (%#" PRIx64 ")"),
4608 CMSE_STUB_NAME,
4609 (uint64_t)out_sec->output_section->vma
4610 + out_sec->output_offset,
4611 (uint64_t)sym_sec->output_section->vma
4612 + sym_sec->output_offset
4613 + h->root.root.u.def.value);
4614 /* Exit, rather than leave incompletely processed
4615 relocations. */
4616 xexit(1);
4617 }
4618
906e58ca
NC		 4619 /* If this input section is part of a group of sections sharing one
4620 stub section, then use the id of the first section in the group.
4621 Stub names need to include a section id, as there may well be
4622 more than one stub used to reach say, printf, and we need to
4623 distinguish between them. */
c2abbbeb 4624 BFD_ASSERT (input_section->id <= htab->top_id);
906e58ca
NC		 4625 id_sec = htab->stub_group[input_section->id].link_sec;
4626
4627 if (h != NULL && h->stub_cache != NULL
4628 && h->stub_cache->h == h
fe33d2fa
CL		 4629 && h->stub_cache->id_sec == id_sec
4630 && h->stub_cache->stub_type == stub_type)
906e58ca
NC		 4631 {
4632 stub_entry = h->stub_cache;
4633 }
4634 else
4635 {
4636 char *stub_name;
4637
fe33d2fa 4638 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel, stub_type);
906e58ca
NC		 4639 if (stub_name == NULL)
4640 return NULL;
4641
4642 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
4643 stub_name, FALSE, FALSE);
4644 if (h != NULL)
4645 h->stub_cache = stub_entry;
4646
4647 free (stub_name);
4648 }
4649
4650 return stub_entry;
4651}
4652
daa4adae
TP		 4653/* Whether veneers of type STUB_TYPE require to be in a dedicated output
4654 section. */
4655
4656static bfd_boolean
4657arm_dedicated_stub_output_section_required (enum elf32_arm_stub_type stub_type)
4658{
4659 if (stub_type >= max_stub_type)
4660 abort (); /* Should be unreachable. */
4661
4ba2ef8f
TP		 4662 switch (stub_type)
4663 {
4664 case arm_stub_cmse_branch_thumb_only:
4665 return TRUE;
4666
4667 default:
4668 return FALSE;
4669 }
4670
4671 abort (); /* Should be unreachable. */
daa4adae
TP		 4672}
4673
4674/* Required alignment (as a power of 2) for the dedicated section holding
4675 veneers of type STUB_TYPE, or 0 if veneers of this type are interspersed
4676 with input sections. */
4677
4678static int
4679arm_dedicated_stub_output_section_required_alignment
4680 (enum elf32_arm_stub_type stub_type)
4681{
4682 if (stub_type >= max_stub_type)
4683 abort (); /* Should be unreachable. */
4684
4ba2ef8f
TP		 4685 switch (stub_type)
4686 {
4687 /* Vectors of Secure Gateway veneers must be aligned on 32byte
4688 boundary. */
4689 case arm_stub_cmse_branch_thumb_only:
4690 return 5;
4691
4692 default:
4693 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4694 return 0;
4695 }
4696
4697 abort (); /* Should be unreachable. */
daa4adae
TP		 4698}
4699
4700/* Name of the dedicated output section to put veneers of type STUB_TYPE, or
4701 NULL if veneers of this type are interspersed with input sections. */
4702
4703static const char *
4704arm_dedicated_stub_output_section_name (enum elf32_arm_stub_type stub_type)
4705{
4706 if (stub_type >= max_stub_type)
4707 abort (); /* Should be unreachable. */
4708
4ba2ef8f
TP		 4709 switch (stub_type)
4710 {
4711 case arm_stub_cmse_branch_thumb_only:
4d83e8d9 4712 return CMSE_STUB_NAME;
4ba2ef8f
TP		 4713
4714 default:
4715 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4716 return NULL;
4717 }
4718
4719 abort (); /* Should be unreachable. */
daa4adae
TP		 4720}
4721
4722/* If veneers of type STUB_TYPE should go in a dedicated output section,
4723 returns the address of the hash table field in HTAB holding a pointer to the
4724 corresponding input section. Otherwise, returns NULL. */
4725
4726static asection **
4ba2ef8f
TP		 4727arm_dedicated_stub_input_section_ptr (struct elf32_arm_link_hash_table *htab,
4728 enum elf32_arm_stub_type stub_type)
daa4adae
TP		 4729{
4730 if (stub_type >= max_stub_type)
4731 abort (); /* Should be unreachable. */
4732
4ba2ef8f
TP		 4733 switch (stub_type)
4734 {
4735 case arm_stub_cmse_branch_thumb_only:
4736 return &htab->cmse_stub_sec;
4737
4738 default:
4739 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
4740 return NULL;
4741 }
4742
4743 abort (); /* Should be unreachable. */
daa4adae
TP		 4744}
4745
4746/* Find or create a stub section to contain a stub of type STUB_TYPE. SECTION
4747 is the section that branch into veneer and can be NULL if stub should go in
4748 a dedicated output section. Returns a pointer to the stub section, and the
4749 section to which the stub section will be attached (in *LINK_SEC_P).
48229727 4750 LINK_SEC_P may be NULL. */
906e58ca 4751
48229727
JB		 4752static asection *
4753elf32_arm_create_or_find_stub_sec (asection **link_sec_p, asection *section,
daa4adae
TP		 4754 struct elf32_arm_link_hash_table *htab,
4755 enum elf32_arm_stub_type stub_type)
906e58ca 4756{
daa4adae
TP		 4757 asection *link_sec, *out_sec, **stub_sec_p;
4758 const char *stub_sec_prefix;
4759 bfd_boolean dedicated_output_section =
4760 arm_dedicated_stub_output_section_required (stub_type);
4761 int align;
906e58ca 4762
daa4adae 4763 if (dedicated_output_section)
906e58ca 4764 {
daa4adae
TP		 4765 bfd *output_bfd = htab->obfd;
4766 const char *out_sec_name =
4767 arm_dedicated_stub_output_section_name (stub_type);
4768 link_sec = NULL;
4769 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
4770 stub_sec_prefix = out_sec_name;
4771 align = arm_dedicated_stub_output_section_required_alignment (stub_type);
4772 out_sec = bfd_get_section_by_name (output_bfd, out_sec_name);
4773 if (out_sec == NULL)
906e58ca 4774 {
90b6238f 4775 _bfd_error_handler (_("no address assigned to the veneers output "
4eca0228 4776 "section %s"), out_sec_name);
daa4adae 4777 return NULL;
906e58ca 4778 }
daa4adae
TP		 4779 }
4780 else
4781 {
c2abbbeb 4782 BFD_ASSERT (section->id <= htab->top_id);
daa4adae
TP		 4783 link_sec = htab->stub_group[section->id].link_sec;
4784 BFD_ASSERT (link_sec != NULL);
4785 stub_sec_p = &htab->stub_group[section->id].stub_sec;
4786 if (*stub_sec_p == NULL)
4787 stub_sec_p = &htab->stub_group[link_sec->id].stub_sec;
4788 stub_sec_prefix = link_sec->name;
4789 out_sec = link_sec->output_section;
4790 align = htab->nacl_p ? 4 : 3;
906e58ca 4791 }
b38cadfb 4792
daa4adae
TP		 4793 if (*stub_sec_p == NULL)
4794 {
4795 size_t namelen;
4796 bfd_size_type len;
4797 char *s_name;
4798
4799 namelen = strlen (stub_sec_prefix);
4800 len = namelen + sizeof (STUB_SUFFIX);
4801 s_name = (char *) bfd_alloc (htab->stub_bfd, len);
4802 if (s_name == NULL)
4803 return NULL;
4804
4805 memcpy (s_name, stub_sec_prefix, namelen);
4806 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4807 *stub_sec_p = (*htab->add_stub_section) (s_name, out_sec, link_sec,
4808 align);
4809 if (*stub_sec_p == NULL)
4810 return NULL;
4811
4812 out_sec->flags |= SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
4813 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY
4814 | SEC_KEEP;
4815 }
4816
4817 if (!dedicated_output_section)
4818 htab->stub_group[section->id].stub_sec = *stub_sec_p;
4819
48229727
JB		 4820 if (link_sec_p)
4821 *link_sec_p = link_sec;
b38cadfb 4822
daa4adae 4823 return *stub_sec_p;
48229727
JB		 4824}
4825
4826/* Add a new stub entry to the stub hash. Not all fields of the new
4827 stub entry are initialised. */
4828
4829static struct elf32_arm_stub_hash_entry *
daa4adae
TP		 4830elf32_arm_add_stub (const char *stub_name, asection *section,
4831 struct elf32_arm_link_hash_table *htab,
4832 enum elf32_arm_stub_type stub_type)
48229727
JB		 4833{
4834 asection *link_sec;
4835 asection *stub_sec;
4836 struct elf32_arm_stub_hash_entry *stub_entry;
4837
daa4adae
TP		 4838 stub_sec = elf32_arm_create_or_find_stub_sec (&link_sec, section, htab,
4839 stub_type);
48229727
JB		 4840 if (stub_sec == NULL)
4841 return NULL;
906e58ca
NC		 4842
4843 /* Enter this entry into the linker stub hash table. */
4844 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4845 TRUE, FALSE);
4846 if (stub_entry == NULL)
4847 {
6bde4c52
TP		 4848 if (section == NULL)
4849 section = stub_sec;
871b3ab2 4850 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4eca0228 4851 section->owner, stub_name);
906e58ca
NC		 4852 return NULL;
4853 }
4854
4855 stub_entry->stub_sec = stub_sec;
0955507f 4856 stub_entry->stub_offset = (bfd_vma) -1;
906e58ca
NC		 4857 stub_entry->id_sec = link_sec;
4858
906e58ca
NC		 4859 return stub_entry;
4860}
4861
4862/* Store an Arm insn into an output section not processed by
4863 elf32_arm_write_section. */
4864
4865static void
8029a119
NC		 4866put_arm_insn (struct elf32_arm_link_hash_table * htab,
4867 bfd * output_bfd, bfd_vma val, void * ptr)
906e58ca
NC		 4868{
4869 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4870 bfd_putl32 (val, ptr);
4871 else
4872 bfd_putb32 (val, ptr);
4873}
4874
4875/* Store a 16-bit Thumb insn into an output section not processed by
4876 elf32_arm_write_section. */
4877
4878static void
8029a119
NC		 4879put_thumb_insn (struct elf32_arm_link_hash_table * htab,
4880 bfd * output_bfd, bfd_vma val, void * ptr)
906e58ca
NC		 4881{
4882 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4883 bfd_putl16 (val, ptr);
4884 else
4885 bfd_putb16 (val, ptr);
4886}
4887
a504d23a
LA		 4888/* Store a Thumb2 insn into an output section not processed by
4889 elf32_arm_write_section. */
4890
4891static void
4892put_thumb2_insn (struct elf32_arm_link_hash_table * htab,
b98e6871 4893 bfd * output_bfd, bfd_vma val, bfd_byte * ptr)
a504d23a
LA		 4894{
4895 /* T2 instructions are 16-bit streamed. */
4896 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4897 {
4898 bfd_putl16 ((val >> 16) & 0xffff, ptr);
4899 bfd_putl16 ((val & 0xffff), ptr + 2);
4900 }
4901 else
4902 {
4903 bfd_putb16 ((val >> 16) & 0xffff, ptr);
4904 bfd_putb16 ((val & 0xffff), ptr + 2);
4905 }
4906}
4907
0855e32b
NS		 4908/* If it's possible to change R_TYPE to a more efficient access
4909 model, return the new reloc type. */
4910
4911static unsigned
b38cadfb 4912elf32_arm_tls_transition (struct bfd_link_info *info, int r_type,
0855e32b
NS		 4913 struct elf_link_hash_entry *h)
4914{
4915 int is_local = (h == NULL);
4916
9cb09e33 4917 if (bfd_link_dll (info)
0e1862bb 4918 || (h && h->root.type == bfd_link_hash_undefweak))
0855e32b
NS		 4919 return r_type;
4920
b38cadfb 4921 /* We do not support relaxations for Old TLS models. */
0855e32b
NS		 4922 switch (r_type)
4923 {
4924 case R_ARM_TLS_GOTDESC:
4925 case R_ARM_TLS_CALL:
4926 case R_ARM_THM_TLS_CALL:
4927 case R_ARM_TLS_DESCSEQ:
4928 case R_ARM_THM_TLS_DESCSEQ:
4929 return is_local ? R_ARM_TLS_LE32 : R_ARM_TLS_IE32;
4930 }
4931
4932 return r_type;
4933}
4934
48229727
JB		 4935static bfd_reloc_status_type elf32_arm_final_link_relocate
4936 (reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
4937 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
34e77a92
RS		 4938 const char *, unsigned char, enum arm_st_branch_type,
4939 struct elf_link_hash_entry *, bfd_boolean *, char **);
48229727 4940
4563a860
JB		 4941static unsigned int
4942arm_stub_required_alignment (enum elf32_arm_stub_type stub_type)
4943{
4944 switch (stub_type)
4945 {
4946 case arm_stub_a8_veneer_b_cond:
4947 case arm_stub_a8_veneer_b:
4948 case arm_stub_a8_veneer_bl:
4949 return 2;
4950
4951 case arm_stub_long_branch_any_any:
4952 case arm_stub_long_branch_v4t_arm_thumb:
4953 case arm_stub_long_branch_thumb_only:
80c135e5 4954 case arm_stub_long_branch_thumb2_only:
d5a67c02 4955 case arm_stub_long_branch_thumb2_only_pure:
4563a860
JB		 4956 case arm_stub_long_branch_v4t_thumb_thumb:
4957 case arm_stub_long_branch_v4t_thumb_arm:
4958 case arm_stub_short_branch_v4t_thumb_arm:
4959 case arm_stub_long_branch_any_arm_pic:
4960 case arm_stub_long_branch_any_thumb_pic:
4961 case arm_stub_long_branch_v4t_thumb_thumb_pic:
4962 case arm_stub_long_branch_v4t_arm_thumb_pic:
4963 case arm_stub_long_branch_v4t_thumb_arm_pic:
4964 case arm_stub_long_branch_thumb_only_pic:
0855e32b
NS		 4965 case arm_stub_long_branch_any_tls_pic:
4966 case arm_stub_long_branch_v4t_thumb_tls_pic:
4ba2ef8f 4967 case arm_stub_cmse_branch_thumb_only:
4563a860
JB		 4968 case arm_stub_a8_veneer_blx:
4969 return 4;
b38cadfb 4970
7a89b94e
NC		 4971 case arm_stub_long_branch_arm_nacl:
4972 case arm_stub_long_branch_arm_nacl_pic:
4973 return 16;
4974
4563a860
JB		 4975 default:
4976 abort (); /* Should be unreachable. */
4977 }
4978}
4979
4f4faa4d
TP		 4980/* Returns whether stubs of type STUB_TYPE take over the symbol they are
4981 veneering (TRUE) or have their own symbol (FALSE). */
4982
4983static bfd_boolean
4984arm_stub_sym_claimed (enum elf32_arm_stub_type stub_type)
4985{
4986 if (stub_type >= max_stub_type)
4987 abort (); /* Should be unreachable. */
4988
4ba2ef8f
TP		 4989 switch (stub_type)
4990 {
4991 case arm_stub_cmse_branch_thumb_only:
4992 return TRUE;
4993
4994 default:
4995 return FALSE;
4996 }
4997
4998 abort (); /* Should be unreachable. */
4f4faa4d
TP		 4999}
5000
d7c5bd02
TP		 5001/* Returns the padding needed for the dedicated section used stubs of type
5002 STUB_TYPE. */
5003
5004static int
5005arm_dedicated_stub_section_padding (enum elf32_arm_stub_type stub_type)
5006{
5007 if (stub_type >= max_stub_type)
5008 abort (); /* Should be unreachable. */
5009
4ba2ef8f
TP		 5010 switch (stub_type)
5011 {
5012 case arm_stub_cmse_branch_thumb_only:
5013 return 32;
5014
5015 default:
5016 return 0;
5017 }
5018
5019 abort (); /* Should be unreachable. */
d7c5bd02
TP		 5020}
5021
0955507f
TP		 5022/* If veneers of type STUB_TYPE should go in a dedicated output section,
5023 returns the address of the hash table field in HTAB holding the offset at
5024 which new veneers should be layed out in the stub section. */
5025
5026static bfd_vma*
5027arm_new_stubs_start_offset_ptr (struct elf32_arm_link_hash_table *htab,
5028 enum elf32_arm_stub_type stub_type)
5029{
5030 switch (stub_type)
5031 {
5032 case arm_stub_cmse_branch_thumb_only:
5033 return &htab->new_cmse_stub_offset;
5034
5035 default:
5036 BFD_ASSERT (!arm_dedicated_stub_output_section_required (stub_type));
5037 return NULL;
5038 }
5039}
5040
906e58ca
NC		 5041static bfd_boolean
5042arm_build_one_stub (struct bfd_hash_entry *gen_entry,
5043 void * in_arg)
5044{
7a89b94e 5045#define MAXRELOCS 3
0955507f 5046 bfd_boolean removed_sg_veneer;
906e58ca 5047 struct elf32_arm_stub_hash_entry *stub_entry;
4dfe6ac6 5048 struct elf32_arm_link_hash_table *globals;
906e58ca 5049 struct bfd_link_info *info;
906e58ca
NC		 5050 asection *stub_sec;
5051 bfd *stub_bfd;
906e58ca
NC		 5052 bfd_byte *loc;
5053 bfd_vma sym_value;
5054 int template_size;
5055 int size;
d3ce72d0 5056 const insn_sequence *template_sequence;
906e58ca 5057 int i;
48229727
JB		 5058 int stub_reloc_idx[MAXRELOCS] = {-1, -1};
5059 int stub_reloc_offset[MAXRELOCS] = {0, 0};
5060 int nrelocs = 0;
0955507f 5061 int just_allocated = 0;
906e58ca
NC		 5062
5063 /* Massage our args to the form they really have. */
5064 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
5065 info = (struct bfd_link_info *) in_arg;
5066
abf874aa
CL		 5067 /* Fail if the target section could not be assigned to an output
5068 section. The user should fix his linker script. */
5069 if (stub_entry->target_section->output_section == NULL
5070 && info->non_contiguous_regions)
53215f21
CL		 5071 info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. "
5072 "Retry without --enable-non-contiguous-regions.\n"),
5073 stub_entry->target_section);
abf874aa 5074
906e58ca 5075 globals = elf32_arm_hash_table (info);
4dfe6ac6
NC		 5076 if (globals == NULL)
5077 return FALSE;
906e58ca 5078
906e58ca
NC		 5079 stub_sec = stub_entry->stub_sec;
5080
4dfe6ac6 5081 if ((globals->fix_cortex_a8 < 0)
4563a860
JB		 5082 != (arm_stub_required_alignment (stub_entry->stub_type) == 2))
5083 /* We have to do less-strictly-aligned fixes last. */
eb7c4339 5084 return TRUE;
fe33d2fa 5085
0955507f
TP		 5086 /* Assign a slot at the end of section if none assigned yet. */
5087 if (stub_entry->stub_offset == (bfd_vma) -1)
5088 {
5089 stub_entry->stub_offset = stub_sec->size;
5090 just_allocated = 1;
5091 }
906e58ca
NC		 5092 loc = stub_sec->contents + stub_entry->stub_offset;
5093
5094 stub_bfd = stub_sec->owner;
5095
906e58ca
NC		 5096 /* This is the address of the stub destination. */
5097 sym_value = (stub_entry->target_value
5098 + stub_entry->target_section->output_offset
5099 + stub_entry->target_section->output_section->vma);
5100
d3ce72d0 5101 template_sequence = stub_entry->stub_template;
461a49ca 5102 template_size = stub_entry->stub_template_size;
906e58ca
NC		 5103
5104 size = 0;
461a49ca 5105 for (i = 0; i < template_size; i++)
906e58ca 5106 {
d3ce72d0 5107 switch (template_sequence[i].type)
461a49ca
DJ		 5108 {
5109 case THUMB16_TYPE:
48229727 5110 {
d3ce72d0
NC		 5111 bfd_vma data = (bfd_vma) template_sequence[i].data;
5112 if (template_sequence[i].reloc_addend != 0)
48229727 5113 {
99059e56
RM		 5114 /* We've borrowed the reloc_addend field to mean we should
5115 insert a condition code into this (Thumb-1 branch)
5116 instruction. See THUMB16_BCOND_INSN. */
5117 BFD_ASSERT ((data & 0xff00) == 0xd000);
5118 data |= ((stub_entry->orig_insn >> 22) & 0xf) << 8;
48229727 5119 }
fe33d2fa 5120 bfd_put_16 (stub_bfd, data, loc + size);
48229727
JB		 5121 size += 2;
5122 }
461a49ca 5123 break;
906e58ca 5124
48229727 5125 case THUMB32_TYPE:
fe33d2fa
CL		 5126 bfd_put_16 (stub_bfd,
5127 (template_sequence[i].data >> 16) & 0xffff,
5128 loc + size);
5129 bfd_put_16 (stub_bfd, template_sequence[i].data & 0xffff,
5130 loc + size + 2);
99059e56
RM		 5131 if (template_sequence[i].r_type != R_ARM_NONE)
5132 {
5133 stub_reloc_idx[nrelocs] = i;
5134 stub_reloc_offset[nrelocs++] = size;
5135 }
5136 size += 4;
5137 break;
48229727 5138
461a49ca 5139 case ARM_TYPE:
fe33d2fa
CL		 5140 bfd_put_32 (stub_bfd, template_sequence[i].data,
5141 loc + size);
461a49ca
DJ		 5142 /* Handle cases where the target is encoded within the
5143 instruction. */
d3ce72d0 5144 if (template_sequence[i].r_type == R_ARM_JUMP24)
461a49ca 5145 {
48229727
JB		 5146 stub_reloc_idx[nrelocs] = i;
5147 stub_reloc_offset[nrelocs++] = size;
461a49ca
DJ		 5148 }
5149 size += 4;
5150 break;
5151
5152 case DATA_TYPE:
d3ce72d0 5153 bfd_put_32 (stub_bfd, template_sequence[i].data, loc + size);
48229727
JB		 5154 stub_reloc_idx[nrelocs] = i;
5155 stub_reloc_offset[nrelocs++] = size;
461a49ca
DJ		 5156 size += 4;
5157 break;
5158
5159 default:
5160 BFD_FAIL ();
5161 return FALSE;
5162 }
906e58ca 5163 }
461a49ca 5164
0955507f
TP		 5165 if (just_allocated)
5166 stub_sec->size += size;
906e58ca 5167
461a49ca
DJ		 5168 /* Stub size has already been computed in arm_size_one_stub. Check
5169 consistency. */
5170 BFD_ASSERT (size == stub_entry->stub_size);
5171
906e58ca 5172 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
35fc36a8 5173 if (stub_entry->branch_type == ST_BRANCH_TO_THUMB)
906e58ca
NC		 5174 sym_value |= 1;
5175
0955507f
TP		 5176 /* Assume non empty slots have at least one and at most MAXRELOCS entries
5177 to relocate in each stub. */
5178 removed_sg_veneer =
5179 (size == 0 && stub_entry->stub_type == arm_stub_cmse_branch_thumb_only);
5180 BFD_ASSERT (removed_sg_veneer || (nrelocs != 0 && nrelocs <= MAXRELOCS));
c820be07 5181
48229727 5182 for (i = 0; i < nrelocs; i++)
8d9d9490
TP		 5183 {
5184 Elf_Internal_Rela rel;
5185 bfd_boolean unresolved_reloc;
5186 char *error_message;
5187 bfd_vma points_to =
5188 sym_value + template_sequence[stub_reloc_idx[i]].reloc_addend;
5189
5190 rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
5191 rel.r_info = ELF32_R_INFO (0,
5192 template_sequence[stub_reloc_idx[i]].r_type);
5193 rel.r_addend = 0;
5194
5195 if (stub_entry->stub_type == arm_stub_a8_veneer_b_cond && i == 0)
5196 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
5197 template should refer back to the instruction after the original
5198 branch. We use target_section as Cortex-A8 erratum workaround stubs
5199 are only generated when both source and target are in the same
5200 section. */
5201 points_to = stub_entry->target_section->output_section->vma
5202 + stub_entry->target_section->output_offset
5203 + stub_entry->source_value;
5204
5205 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
5206 (template_sequence[stub_reloc_idx[i]].r_type),
5207 stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel,
5208 points_to, info, stub_entry->target_section, "", STT_FUNC,
5209 stub_entry->branch_type,
5210 (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc,
5211 &error_message);
5212 }
906e58ca
NC		 5213
5214 return TRUE;
48229727 5215#undef MAXRELOCS
906e58ca
NC		 5216}
5217
48229727
JB		 5218/* Calculate the template, template size and instruction size for a stub.
5219 Return value is the instruction size. */
906e58ca 5220
48229727
JB		 5221static unsigned int
5222find_stub_size_and_template (enum elf32_arm_stub_type stub_type,
5223 const insn_sequence **stub_template,
5224 int *stub_template_size)
906e58ca 5225{
d3ce72d0 5226 const insn_sequence *template_sequence = NULL;
48229727
JB		 5227 int template_size = 0, i;
5228 unsigned int size;
906e58ca 5229
d3ce72d0 5230 template_sequence = stub_definitions[stub_type].template_sequence;
2a229407
AM		 5231 if (stub_template)
5232 *stub_template = template_sequence;
5233
48229727 5234 template_size = stub_definitions[stub_type].template_size;
2a229407
AM		 5235 if (stub_template_size)
5236 *stub_template_size = template_size;
906e58ca
NC		 5237
5238 size = 0;
461a49ca
DJ		 5239 for (i = 0; i < template_size; i++)
5240 {
d3ce72d0 5241 switch (template_sequence[i].type)
461a49ca
DJ		 5242 {
5243 case THUMB16_TYPE:
5244 size += 2;
5245 break;
5246
5247 case ARM_TYPE:
48229727 5248 case THUMB32_TYPE:
461a49ca
DJ		 5249 case DATA_TYPE:
5250 size += 4;
5251 break;
5252
5253 default:
5254 BFD_FAIL ();
2a229407 5255 return 0;
461a49ca
DJ		 5256 }
5257 }
5258
48229727
JB		 5259 return size;
5260}
5261
5262/* As above, but don't actually build the stub. Just bump offset so
5263 we know stub section sizes. */
5264
5265static bfd_boolean
5266arm_size_one_stub (struct bfd_hash_entry *gen_entry,
c7e2358a 5267 void *in_arg ATTRIBUTE_UNUSED)
48229727
JB		 5268{
5269 struct elf32_arm_stub_hash_entry *stub_entry;
d3ce72d0 5270 const insn_sequence *template_sequence;
48229727
JB		 5271 int template_size, size;
5272
5273 /* Massage our args to the form they really have. */
5274 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
48229727
JB		 5275
5276 BFD_ASSERT((stub_entry->stub_type > arm_stub_none)
5277 && stub_entry->stub_type < ARRAY_SIZE(stub_definitions));
5278
d3ce72d0 5279 size = find_stub_size_and_template (stub_entry->stub_type, &template_sequence,
48229727
JB		 5280 &template_size);
5281
0955507f
TP		 5282 /* Initialized to -1. Null size indicates an empty slot full of zeros. */
5283 if (stub_entry->stub_template_size)
5284 {
5285 stub_entry->stub_size = size;
5286 stub_entry->stub_template = template_sequence;
5287 stub_entry->stub_template_size = template_size;
5288 }
5289
5290 /* Already accounted for. */
5291 if (stub_entry->stub_offset != (bfd_vma) -1)
5292 return TRUE;
461a49ca 5293
906e58ca
NC		 5294 size = (size + 7) & ~7;
5295 stub_entry->stub_sec->size += size;
461a49ca 5296
906e58ca
NC		 5297 return TRUE;
5298}
5299
5300/* External entry points for sizing and building linker stubs. */
5301
5302/* Set up various things so that we can make a list of input sections
5303 for each output section included in the link. Returns -1 on error,
5304 0 when no stubs will be needed, and 1 on success. */
5305
5306int
5307elf32_arm_setup_section_lists (bfd *output_bfd,
5308 struct bfd_link_info *info)
5309{
5310 bfd *input_bfd;
5311 unsigned int bfd_count;
7292b3ac 5312 unsigned int top_id, top_index;
906e58ca
NC		 5313 asection *section;
5314 asection **input_list, **list;
986f0783 5315 size_t amt;
906e58ca
NC		 5316 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
5317
4dfe6ac6
NC		 5318 if (htab == NULL)
5319 return 0;
906e58ca
NC		 5320 if (! is_elf_hash_table (htab))
5321 return 0;
5322
5323 /* Count the number of input BFDs and find the top input section id. */
5324 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
5325 input_bfd != NULL;
c72f2fb2 5326 input_bfd = input_bfd->link.next)
906e58ca
NC		 5327 {
5328 bfd_count += 1;
5329 for (section = input_bfd->sections;
5330 section != NULL;
5331 section = section->next)
5332 {
5333 if (top_id < section->id)
5334 top_id = section->id;
5335 }
5336 }
5337 htab->bfd_count = bfd_count;
5338
5339 amt = sizeof (struct map_stub) * (top_id + 1);
21d799b5 5340 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
906e58ca
NC		 5341 if (htab->stub_group == NULL)
5342 return -1;
fe33d2fa 5343 htab->top_id = top_id;
906e58ca
NC		 5344
5345 /* We can't use output_bfd->section_count here to find the top output
5346 section index as some sections may have been removed, and
5347 _bfd_strip_section_from_output doesn't renumber the indices. */
5348 for (section = output_bfd->sections, top_index = 0;
5349 section != NULL;
5350 section = section->next)
5351 {
5352 if (top_index < section->index)
5353 top_index = section->index;
5354 }
5355
5356 htab->top_index = top_index;
5357 amt = sizeof (asection *) * (top_index + 1);
21d799b5 5358 input_list = (asection **) bfd_malloc (amt);
906e58ca
NC		 5359 htab->input_list = input_list;
5360 if (input_list == NULL)
5361 return -1;
5362
5363 /* For sections we aren't interested in, mark their entries with a
5364 value we can check later. */
5365 list = input_list + top_index;
5366 do
5367 *list = bfd_abs_section_ptr;
5368 while (list-- != input_list);
5369
5370 for (section = output_bfd->sections;
5371 section != NULL;
5372 section = section->next)
5373 {
5374 if ((section->flags & SEC_CODE) != 0)
5375 input_list[section->index] = NULL;
5376 }
5377
5378 return 1;
5379}
5380
5381/* The linker repeatedly calls this function for each input section,
5382 in the order that input sections are linked into output sections.
5383 Build lists of input sections to determine groupings between which
5384 we may insert linker stubs. */
5385
5386void
5387elf32_arm_next_input_section (struct bfd_link_info *info,
5388 asection *isec)
5389{
5390 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
5391
4dfe6ac6
NC		 5392 if (htab == NULL)
5393 return;
5394
906e58ca
NC		 5395 if (isec->output_section->index <= htab->top_index)
5396 {
5397 asection **list = htab->input_list + isec->output_section->index;
5398
a7470592 5399 if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0)
906e58ca
NC		 5400 {
5401 /* Steal the link_sec pointer for our list. */
5402#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
5403 /* This happens to make the list in reverse order,
07d72278 5404 which we reverse later. */
906e58ca
NC		 5405 PREV_SEC (isec) = *list;
5406 *list = isec;
5407 }
5408 }
5409}
5410
5411/* See whether we can group stub sections together. Grouping stub
5412 sections may result in fewer stubs. More importantly, we need to
07d72278 5413 put all .init* and .fini* stubs at the end of the .init or
906e58ca
NC		 5414 .fini output sections respectively, because glibc splits the
5415 _init and _fini functions into multiple parts. Putting a stub in
5416 the middle of a function is not a good idea. */
5417
5418static void
5419group_sections (struct elf32_arm_link_hash_table *htab,
5420 bfd_size_type stub_group_size,
07d72278 5421 bfd_boolean stubs_always_after_branch)
906e58ca 5422{
07d72278 5423 asection **list = htab->input_list;
906e58ca
NC		 5424
5425 do
5426 {
5427 asection *tail = *list;
07d72278 5428 asection *head;
906e58ca
NC		 5429
5430 if (tail == bfd_abs_section_ptr)
5431 continue;
5432
07d72278
DJ		 5433 /* Reverse the list: we must avoid placing stubs at the
5434 beginning of the section because the beginning of the text
5435 section may be required for an interrupt vector in bare metal
5436 code. */
5437#define NEXT_SEC PREV_SEC
e780aef2
CL		 5438 head = NULL;
5439 while (tail != NULL)
99059e56
RM		 5440 {
5441 /* Pop from tail. */
5442 asection *item = tail;
5443 tail = PREV_SEC (item);
e780aef2 5444
99059e56
RM		 5445 /* Push on head. */
5446 NEXT_SEC (item) = head;
5447 head = item;
5448 }
07d72278
DJ		 5449
5450 while (head != NULL)
906e58ca
NC		 5451 {
5452 asection *curr;
07d72278 5453 asection *next;
e780aef2
CL		 5454 bfd_vma stub_group_start = head->output_offset;
5455 bfd_vma end_of_next;
906e58ca 5456
07d72278 5457 curr = head;
e780aef2 5458 while (NEXT_SEC (curr) != NULL)
8cd931b7 5459 {
e780aef2
CL		 5460 next = NEXT_SEC (curr);
5461 end_of_next = next->output_offset + next->size;
5462 if (end_of_next - stub_group_start >= stub_group_size)
5463 /* End of NEXT is too far from start, so stop. */
8cd931b7 5464 break;
e780aef2
CL		 5465 /* Add NEXT to the group. */
5466 curr = next;
8cd931b7 5467 }
906e58ca 5468
07d72278 5469 /* OK, the size from the start to the start of CURR is less
906e58ca 5470 than stub_group_size and thus can be handled by one stub
07d72278 5471 section. (Or the head section is itself larger than
906e58ca
NC		 5472 stub_group_size, in which case we may be toast.)
5473 We should really be keeping track of the total size of
5474 stubs added here, as stubs contribute to the final output
7fb9f789 5475 section size. */
906e58ca
NC		 5476 do
5477 {
07d72278 5478 next = NEXT_SEC (head);
906e58ca 5479 /* Set up this stub group. */
07d72278 5480 htab->stub_group[head->id].link_sec = curr;
906e58ca 5481 }
07d72278 5482 while (head != curr && (head = next) != NULL);
906e58ca
NC		 5483
5484 /* But wait, there's more! Input sections up to stub_group_size
07d72278
DJ		 5485 bytes after the stub section can be handled by it too. */
5486 if (!stubs_always_after_branch)
906e58ca 5487 {
e780aef2
CL		 5488 stub_group_start = curr->output_offset + curr->size;
5489
8cd931b7 5490 while (next != NULL)
906e58ca 5491 {
e780aef2
CL		 5492 end_of_next = next->output_offset + next->size;
5493 if (end_of_next - stub_group_start >= stub_group_size)
5494 /* End of NEXT is too far from stubs, so stop. */
8cd931b7 5495 break;
e780aef2 5496 /* Add NEXT to the stub group. */
07d72278
DJ		 5497 head = next;
5498 next = NEXT_SEC (head);
5499 htab->stub_group[head->id].link_sec = curr;
906e58ca
NC		 5500 }
5501 }
07d72278 5502 head = next;
906e58ca
NC		 5503 }
5504 }
07d72278 5505 while (list++ != htab->input_list + htab->top_index);
906e58ca
NC		 5506
5507 free (htab->input_list);
5508#undef PREV_SEC
07d72278 5509#undef NEXT_SEC
906e58ca
NC		 5510}
5511
48229727
JB		 5512/* Comparison function for sorting/searching relocations relating to Cortex-A8
5513 erratum fix. */
5514
5515static int
5516a8_reloc_compare (const void *a, const void *b)
5517{
21d799b5
NC		 5518 const struct a8_erratum_reloc *ra = (const struct a8_erratum_reloc *) a;
5519 const struct a8_erratum_reloc *rb = (const struct a8_erratum_reloc *) b;
48229727
JB		 5520
5521 if (ra->from < rb->from)
5522 return -1;
5523 else if (ra->from > rb->from)
5524 return 1;
5525 else
5526 return 0;
5527}
5528
5529static struct elf_link_hash_entry *find_thumb_glue (struct bfd_link_info *,
5530 const char *, char **);
5531
5532/* Helper function to scan code for sequences which might trigger the Cortex-A8
5533 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
81694485 5534 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
48229727
JB		 5535 otherwise. */
5536
81694485
NC		 5537static bfd_boolean
5538cortex_a8_erratum_scan (bfd *input_bfd,
5539 struct bfd_link_info *info,
48229727
JB		 5540 struct a8_erratum_fix **a8_fixes_p,
5541 unsigned int *num_a8_fixes_p,
5542 unsigned int *a8_fix_table_size_p,
5543 struct a8_erratum_reloc *a8_relocs,
eb7c4339
NS		 5544 unsigned int num_a8_relocs,
5545 unsigned prev_num_a8_fixes,
5546 bfd_boolean *stub_changed_p)
48229727
JB		 5547{
5548 asection *section;
5549 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
5550 struct a8_erratum_fix *a8_fixes = *a8_fixes_p;
5551 unsigned int num_a8_fixes = *num_a8_fixes_p;
5552 unsigned int a8_fix_table_size = *a8_fix_table_size_p;
5553
4dfe6ac6
NC		 5554 if (htab == NULL)
5555 return FALSE;
5556
48229727
JB		 5557 for (section = input_bfd->sections;
5558 section != NULL;
5559 section = section->next)
5560 {
5561 bfd_byte *contents = NULL;
5562 struct _arm_elf_section_data *sec_data;
5563 unsigned int span;
5564 bfd_vma base_vma;
5565
5566 if (elf_section_type (section) != SHT_PROGBITS
99059e56
RM		 5567 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
5568 || (section->flags & SEC_EXCLUDE) != 0
5569 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
5570 || (section->output_section == bfd_abs_section_ptr))
5571 continue;
48229727
JB		 5572
5573 base_vma = section->output_section->vma + section->output_offset;
5574
5575 if (elf_section_data (section)->this_hdr.contents != NULL)
99059e56 5576 contents = elf_section_data (section)->this_hdr.contents;
48229727 5577 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
99059e56 5578 return TRUE;
48229727
JB		 5579
5580 sec_data = elf32_arm_section_data (section);
5581
5582 for (span = 0; span < sec_data->mapcount; span++)
99059e56
RM		 5583 {
5584 unsigned int span_start = sec_data->map[span].vma;
5585 unsigned int span_end = (span == sec_data->mapcount - 1)
5586 ? section->size : sec_data->map[span + 1].vma;
5587 unsigned int i;
5588 char span_type = sec_data->map[span].type;
5589 bfd_boolean last_was_32bit = FALSE, last_was_branch = FALSE;
5590
5591 if (span_type != 't')
5592 continue;
5593
5594 /* Span is entirely within a single 4KB region: skip scanning. */
5595 if (((base_vma + span_start) & ~0xfff)
48229727 5596 == ((base_vma + span_end) & ~0xfff))
99059e56
RM		 5597 continue;
5598
5599 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
5600
5601 * The opcode is BLX.W, BL.W, B.W, Bcc.W
5602 * The branch target is in the same 4KB region as the
5603 first half of the branch.
5604 * The instruction before the branch is a 32-bit
5605 length non-branch instruction. */
5606 for (i = span_start; i < span_end;)
5607 {
5608 unsigned int insn = bfd_getl16 (&contents[i]);
5609 bfd_boolean insn_32bit = FALSE, is_blx = FALSE, is_b = FALSE;
48229727
JB		 5610 bfd_boolean is_bl = FALSE, is_bcc = FALSE, is_32bit_branch;
5611
99059e56
RM		 5612 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
5613 insn_32bit = TRUE;
48229727
JB		 5614
5615 if (insn_32bit)
99059e56
RM		 5616 {
5617 /* Load the rest of the insn (in manual-friendly order). */
5618 insn = (insn << 16) | bfd_getl16 (&contents[i + 2]);
5619
5620 /* Encoding T4: B<c>.W. */
5621 is_b = (insn & 0xf800d000) == 0xf0009000;
5622 /* Encoding T1: BL<c>.W. */
5623 is_bl = (insn & 0xf800d000) == 0xf000d000;
5624 /* Encoding T2: BLX<c>.W. */
5625 is_blx = (insn & 0xf800d000) == 0xf000c000;
48229727
JB		 5626 /* Encoding T3: B<c>.W (not permitted in IT block). */
5627 is_bcc = (insn & 0xf800d000) == 0xf0008000
5628 && (insn & 0x07f00000) != 0x03800000;
5629 }
5630
5631 is_32bit_branch = is_b || is_bl || is_blx || is_bcc;
fe33d2fa 5632
99059e56 5633 if (((base_vma + i) & 0xfff) == 0xffe
81694485
NC		 5634 && insn_32bit
5635 && is_32bit_branch
5636 && last_was_32bit
5637 && ! last_was_branch)
99059e56
RM		 5638 {
5639 bfd_signed_vma offset = 0;
5640 bfd_boolean force_target_arm = FALSE;
48229727 5641 bfd_boolean force_target_thumb = FALSE;
99059e56
RM		 5642 bfd_vma target;
5643 enum elf32_arm_stub_type stub_type = arm_stub_none;
5644 struct a8_erratum_reloc key, *found;
5645 bfd_boolean use_plt = FALSE;
48229727 5646
99059e56
RM		 5647 key.from = base_vma + i;
5648 found = (struct a8_erratum_reloc *)
5649 bsearch (&key, a8_relocs, num_a8_relocs,
5650 sizeof (struct a8_erratum_reloc),
5651 &a8_reloc_compare);
48229727
JB		 5652
5653 if (found)
5654 {
5655 char *error_message = NULL;
5656 struct elf_link_hash_entry *entry;
5657
5658 /* We don't care about the error returned from this
99059e56 5659 function, only if there is glue or not. */
48229727
JB		 5660 entry = find_thumb_glue (info, found->sym_name,
5661 &error_message);
5662
5663 if (entry)
5664 found->non_a8_stub = TRUE;
5665
92750f34 5666 /* Keep a simpler condition, for the sake of clarity. */
362d30a1 5667 if (htab->root.splt != NULL && found->hash != NULL
92750f34
DJ		 5668 && found->hash->root.plt.offset != (bfd_vma) -1)
5669 use_plt = TRUE;
5670
5671 if (found->r_type == R_ARM_THM_CALL)
5672 {
35fc36a8
RS		 5673 if (found->branch_type == ST_BRANCH_TO_ARM
5674 || use_plt)
92750f34
DJ		 5675 force_target_arm = TRUE;
5676 else
5677 force_target_thumb = TRUE;
5678 }
48229727
JB		 5679 }
5680
99059e56 5681 /* Check if we have an offending branch instruction. */
48229727
JB		 5682
5683 if (found && found->non_a8_stub)
5684 /* We've already made a stub for this instruction, e.g.
5685 it's a long branch or a Thumb->ARM stub. Assume that
5686 stub will suffice to work around the A8 erratum (see
5687 setting of always_after_branch above). */
5688 ;
99059e56
RM		 5689 else if (is_bcc)
5690 {
5691 offset = (insn & 0x7ff) << 1;
5692 offset |= (insn & 0x3f0000) >> 4;
5693 offset |= (insn & 0x2000) ? 0x40000 : 0;
5694 offset |= (insn & 0x800) ? 0x80000 : 0;
5695 offset |= (insn & 0x4000000) ? 0x100000 : 0;
5696 if (offset & 0x100000)
5697 offset |= ~ ((bfd_signed_vma) 0xfffff);
5698 stub_type = arm_stub_a8_veneer_b_cond;
5699 }
5700 else if (is_b || is_bl || is_blx)
5701 {
5702 int s = (insn & 0x4000000) != 0;
5703 int j1 = (insn & 0x2000) != 0;
5704 int j2 = (insn & 0x800) != 0;
5705 int i1 = !(j1 ^ s);
5706 int i2 = !(j2 ^ s);
5707
5708 offset = (insn & 0x7ff) << 1;
5709 offset |= (insn & 0x3ff0000) >> 4;
5710 offset |= i2 << 22;
5711 offset |= i1 << 23;
5712 offset |= s << 24;
5713 if (offset & 0x1000000)
5714 offset |= ~ ((bfd_signed_vma) 0xffffff);
5715
5716 if (is_blx)
5717 offset &= ~ ((bfd_signed_vma) 3);
5718
5719 stub_type = is_blx ? arm_stub_a8_veneer_blx :
5720 is_bl ? arm_stub_a8_veneer_bl : arm_stub_a8_veneer_b;
5721 }
5722
5723 if (stub_type != arm_stub_none)
5724 {
5725 bfd_vma pc_for_insn = base_vma + i + 4;
48229727
JB		 5726
5727 /* The original instruction is a BL, but the target is
99059e56 5728 an ARM instruction. If we were not making a stub,
48229727
JB		 5729 the BL would have been converted to a BLX. Use the
5730 BLX stub instead in that case. */
5731 if (htab->use_blx && force_target_arm
5732 && stub_type == arm_stub_a8_veneer_bl)
5733 {
5734 stub_type = arm_stub_a8_veneer_blx;
5735 is_blx = TRUE;
5736 is_bl = FALSE;
5737 }
5738 /* Conversely, if the original instruction was
5739 BLX but the target is Thumb mode, use the BL
5740 stub. */
5741 else if (force_target_thumb
5742 && stub_type == arm_stub_a8_veneer_blx)
5743 {
5744 stub_type = arm_stub_a8_veneer_bl;
5745 is_blx = FALSE;
5746 is_bl = TRUE;
5747 }
5748
99059e56
RM		 5749 if (is_blx)
5750 pc_for_insn &= ~ ((bfd_vma) 3);
48229727 5751
99059e56
RM		 5752 /* If we found a relocation, use the proper destination,
5753 not the offset in the (unrelocated) instruction.
48229727
JB		 5754 Note this is always done if we switched the stub type
5755 above. */
99059e56
RM		 5756 if (found)
5757 offset =
81694485 5758 (bfd_signed_vma) (found->destination - pc_for_insn);
48229727 5759
99059e56
RM		 5760 /* If the stub will use a Thumb-mode branch to a
5761 PLT target, redirect it to the preceding Thumb
5762 entry point. */
5763 if (stub_type != arm_stub_a8_veneer_blx && use_plt)
5764 offset -= PLT_THUMB_STUB_SIZE;
7d24e6a6 5765
99059e56 5766 target = pc_for_insn + offset;
48229727 5767
99059e56
RM		 5768 /* The BLX stub is ARM-mode code. Adjust the offset to
5769 take the different PC value (+8 instead of +4) into
48229727 5770 account. */
99059e56
RM		 5771 if (stub_type == arm_stub_a8_veneer_blx)
5772 offset += 4;
5773
5774 if (((base_vma + i) & ~0xfff) == (target & ~0xfff))
5775 {
5776 char *stub_name = NULL;
5777
5778 if (num_a8_fixes == a8_fix_table_size)
5779 {
5780 a8_fix_table_size *= 2;
5781 a8_fixes = (struct a8_erratum_fix *)
5782 bfd_realloc (a8_fixes,
5783 sizeof (struct a8_erratum_fix)
5784 * a8_fix_table_size);
5785 }
48229727 5786
eb7c4339
NS		 5787 if (num_a8_fixes < prev_num_a8_fixes)
5788 {
5789 /* If we're doing a subsequent scan,
5790 check if we've found the same fix as
5791 before, and try and reuse the stub
5792 name. */
5793 stub_name = a8_fixes[num_a8_fixes].stub_name;
5794 if ((a8_fixes[num_a8_fixes].section != section)
5795 || (a8_fixes[num_a8_fixes].offset != i))
5796 {
5797 free (stub_name);
5798 stub_name = NULL;
5799 *stub_changed_p = TRUE;
5800 }
5801 }
5802
5803 if (!stub_name)
5804 {
21d799b5 5805 stub_name = (char *) bfd_malloc (8 + 1 + 8 + 1);
eb7c4339
NS		 5806 if (stub_name != NULL)
5807 sprintf (stub_name, "%x:%x", section->id, i);
5808 }
48229727 5809
99059e56
RM		 5810 a8_fixes[num_a8_fixes].input_bfd = input_bfd;
5811 a8_fixes[num_a8_fixes].section = section;
5812 a8_fixes[num_a8_fixes].offset = i;
8d9d9490
TP		 5813 a8_fixes[num_a8_fixes].target_offset =
5814 target - base_vma;
99059e56
RM		 5815 a8_fixes[num_a8_fixes].orig_insn = insn;
5816 a8_fixes[num_a8_fixes].stub_name = stub_name;
5817 a8_fixes[num_a8_fixes].stub_type = stub_type;
5818 a8_fixes[num_a8_fixes].branch_type =
35fc36a8 5819 is_blx ? ST_BRANCH_TO_ARM : ST_BRANCH_TO_THUMB;
48229727 5820
99059e56
RM		 5821 num_a8_fixes++;
5822 }
5823 }
5824 }
48229727 5825
99059e56
RM		 5826 i += insn_32bit ? 4 : 2;
5827 last_was_32bit = insn_32bit;
48229727 5828 last_was_branch = is_32bit_branch;
99059e56
RM		 5829 }
5830 }
48229727
JB		 5831
5832 if (elf_section_data (section)->this_hdr.contents == NULL)
99059e56 5833 free (contents);
48229727 5834 }
fe33d2fa 5835
48229727
JB		 5836 *a8_fixes_p = a8_fixes;
5837 *num_a8_fixes_p = num_a8_fixes;
5838 *a8_fix_table_size_p = a8_fix_table_size;
fe33d2fa 5839
81694485 5840 return FALSE;
48229727
JB		 5841}
5842
b715f643
TP		 5843/* Create or update a stub entry depending on whether the stub can already be
5844 found in HTAB. The stub is identified by:
5845 - its type STUB_TYPE
5846 - its source branch (note that several can share the same stub) whose
5847 section and relocation (if any) are given by SECTION and IRELA
5848 respectively
5849 - its target symbol whose input section, hash, name, value and branch type
5850 are given in SYM_SEC, HASH, SYM_NAME, SYM_VALUE and BRANCH_TYPE
5851 respectively
5852
5853 If found, the value of the stub's target symbol is updated from SYM_VALUE
5854 and *NEW_STUB is set to FALSE. Otherwise, *NEW_STUB is set to
5855 TRUE and the stub entry is initialized.
5856
0955507f
TP		 5857 Returns the stub that was created or updated, or NULL if an error
5858 occurred. */
b715f643 5859
0955507f 5860static struct elf32_arm_stub_hash_entry *
b715f643
TP		 5861elf32_arm_create_stub (struct elf32_arm_link_hash_table *htab,
5862 enum elf32_arm_stub_type stub_type, asection *section,
5863 Elf_Internal_Rela *irela, asection *sym_sec,
5864 struct elf32_arm_link_hash_entry *hash, char *sym_name,
5865 bfd_vma sym_value, enum arm_st_branch_type branch_type,
5866 bfd_boolean *new_stub)
5867{
5868 const asection *id_sec;
5869 char *stub_name;
5870 struct elf32_arm_stub_hash_entry *stub_entry;
5871 unsigned int r_type;
4f4faa4d 5872 bfd_boolean sym_claimed = arm_stub_sym_claimed (stub_type);
b715f643
TP		 5873
5874 BFD_ASSERT (stub_type != arm_stub_none);
5875 *new_stub = FALSE;
5876
4f4faa4d
TP		 5877 if (sym_claimed)
5878 stub_name = sym_name;
5879 else
5880 {
5881 BFD_ASSERT (irela);
5882 BFD_ASSERT (section);
c2abbbeb 5883 BFD_ASSERT (section->id <= htab->top_id);
b715f643 5884
4f4faa4d
TP		 5885 /* Support for grouping stub sections. */
5886 id_sec = htab->stub_group[section->id].link_sec;
b715f643 5887
4f4faa4d
TP		 5888 /* Get the name of this stub. */
5889 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, irela,
5890 stub_type);
5891 if (!stub_name)
0955507f 5892 return NULL;
4f4faa4d 5893 }
b715f643
TP		 5894
5895 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name, FALSE,
5896 FALSE);
5897 /* The proper stub has already been created, just update its value. */
5898 if (stub_entry != NULL)
5899 {
4f4faa4d
TP		 5900 if (!sym_claimed)
5901 free (stub_name);
b715f643 5902 stub_entry->target_value = sym_value;
0955507f 5903 return stub_entry;
b715f643
TP		 5904 }
5905
daa4adae 5906 stub_entry = elf32_arm_add_stub (stub_name, section, htab, stub_type);
b715f643
TP		 5907 if (stub_entry == NULL)
5908 {
4f4faa4d
TP		 5909 if (!sym_claimed)
5910 free (stub_name);
0955507f 5911 return NULL;
b715f643
TP		 5912 }
5913
5914 stub_entry->target_value = sym_value;
5915 stub_entry->target_section = sym_sec;
5916 stub_entry->stub_type = stub_type;
5917 stub_entry->h = hash;
5918 stub_entry->branch_type = branch_type;
5919
4f4faa4d
TP		 5920 if (sym_claimed)
5921 stub_entry->output_name = sym_name;
5922 else
b715f643 5923 {
4f4faa4d
TP		 5924 if (sym_name == NULL)
5925 sym_name = "unnamed";
5926 stub_entry->output_name = (char *)
5927 bfd_alloc (htab->stub_bfd, sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
5928 + strlen (sym_name));
5929 if (stub_entry->output_name == NULL)
5930 {
5931 free (stub_name);
0955507f 5932 return NULL;
4f4faa4d 5933 }
b715f643 5934
4f4faa4d
TP		 5935 /* For historical reasons, use the existing names for ARM-to-Thumb and
5936 Thumb-to-ARM stubs. */
5937 r_type = ELF32_R_TYPE (irela->r_info);
5938 if ((r_type == (unsigned int) R_ARM_THM_CALL
5939 || r_type == (unsigned int) R_ARM_THM_JUMP24
5940 || r_type == (unsigned int) R_ARM_THM_JUMP19)
5941 && branch_type == ST_BRANCH_TO_ARM)
5942 sprintf (stub_entry->output_name, THUMB2ARM_GLUE_ENTRY_NAME, sym_name);
5943 else if ((r_type == (unsigned int) R_ARM_CALL
5944 || r_type == (unsigned int) R_ARM_JUMP24)
5945 && branch_type == ST_BRANCH_TO_THUMB)
5946 sprintf (stub_entry->output_name, ARM2THUMB_GLUE_ENTRY_NAME, sym_name);
5947 else
5948 sprintf (stub_entry->output_name, STUB_ENTRY_NAME, sym_name);
5949 }
b715f643
TP		 5950
5951 *new_stub = TRUE;
0955507f 5952 return stub_entry;
b715f643
TP		 5953}
5954
4ba2ef8f
TP		 5955/* Scan symbols in INPUT_BFD to identify secure entry functions needing a
5956 gateway veneer to transition from non secure to secure state and create them
5957 accordingly.
5958
5959 "ARMv8-M Security Extensions: Requirements on Development Tools" document
5960 defines the conditions that govern Secure Gateway veneer creation for a
5961 given symbol <SYM> as follows:
5962 - it has function type
5963 - it has non local binding
5964 - a symbol named __acle_se_<SYM> (called special symbol) exists with the
5965 same type, binding and value as <SYM> (called normal symbol).
5966 An entry function can handle secure state transition itself in which case
5967 its special symbol would have a different value from the normal symbol.
5968
5969 OUT_ATTR gives the output attributes, SYM_HASHES the symbol index to hash
5970 entry mapping while HTAB gives the name to hash entry mapping.
0955507f
TP		 5971 *CMSE_STUB_CREATED is increased by the number of secure gateway veneer
5972 created.
4ba2ef8f 5973
0955507f 5974 The return value gives whether a stub failed to be allocated. */
4ba2ef8f
TP		 5975
5976static bfd_boolean
5977cmse_scan (bfd *input_bfd, struct elf32_arm_link_hash_table *htab,
5978 obj_attribute *out_attr, struct elf_link_hash_entry **sym_hashes,
0955507f 5979 int *cmse_stub_created)
4ba2ef8f
TP		 5980{
5981 const struct elf_backend_data *bed;
5982 Elf_Internal_Shdr *symtab_hdr;
5983 unsigned i, j, sym_count, ext_start;
5984 Elf_Internal_Sym *cmse_sym, *local_syms;
5985 struct elf32_arm_link_hash_entry *hash, *cmse_hash = NULL;
5986 enum arm_st_branch_type branch_type;
5987 char *sym_name, *lsym_name;
5988 bfd_vma sym_value;
5989 asection *section;
0955507f
TP		 5990 struct elf32_arm_stub_hash_entry *stub_entry;
5991 bfd_boolean is_v8m, new_stub, cmse_invalid, ret = TRUE;
4ba2ef8f
TP		 5992
5993 bed = get_elf_backend_data (input_bfd);
5994 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5995 sym_count = symtab_hdr->sh_size / bed->s->sizeof_sym;
5996 ext_start = symtab_hdr->sh_info;
5997 is_v8m = (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V8M_BASE
5998 && out_attr[Tag_CPU_arch_profile].i == 'M');
5999
6000 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
6001 if (local_syms == NULL)
6002 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
6003 symtab_hdr->sh_info, 0, NULL, NULL,
6004 NULL);
6005 if (symtab_hdr->sh_info && local_syms == NULL)
6006 return FALSE;
6007
6008 /* Scan symbols. */
6009 for (i = 0; i < sym_count; i++)
6010 {
6011 cmse_invalid = FALSE;
6012
6013 if (i < ext_start)
6014 {
6015 cmse_sym = &local_syms[i];
4ba2ef8f
TP		 6016 sym_name = bfd_elf_string_from_elf_section (input_bfd,
6017 symtab_hdr->sh_link,
6018 cmse_sym->st_name);
baf46cd7
AM		 6019 if (!sym_name || !CONST_STRNEQ (sym_name, CMSE_PREFIX))
6020 continue;
6021
4ba2ef8f
TP		 6022 /* Special symbol with local binding. */
6023 cmse_invalid = TRUE;
6024 }
6025 else
6026 {
6027 cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]);
6028 sym_name = (char *) cmse_hash->root.root.root.string;
baf46cd7 6029 if (!CONST_STRNEQ (sym_name, CMSE_PREFIX))
4ba2ef8f
TP		 6030 continue;
6031
6032 /* Special symbol has incorrect binding or type. */
6033 if ((cmse_hash->root.root.type != bfd_link_hash_defined
6034 && cmse_hash->root.root.type != bfd_link_hash_defweak)
6035 || cmse_hash->root.type != STT_FUNC)
6036 cmse_invalid = TRUE;
6037 }
6038
6039 if (!is_v8m)
6040 {
90b6238f
AM		 6041 _bfd_error_handler (_("%pB: special symbol `%s' only allowed for "
6042 "ARMv8-M architecture or later"),
4eca0228 6043 input_bfd, sym_name);
4ba2ef8f
TP		 6044 is_v8m = TRUE; /* Avoid multiple warning. */
6045 ret = FALSE;
6046 }
6047
6048 if (cmse_invalid)
6049 {
90b6238f
AM		 6050 _bfd_error_handler (_("%pB: invalid special symbol `%s'; it must be"
6051 " a global or weak function symbol"),
4eca0228 6052 input_bfd, sym_name);
4ba2ef8f
TP		 6053 ret = FALSE;
6054 if (i < ext_start)
6055 continue;
6056 }
6057
6058 sym_name += strlen (CMSE_PREFIX);
6059 hash = (struct elf32_arm_link_hash_entry *)
6060 elf_link_hash_lookup (&(htab)->root, sym_name, FALSE, FALSE, TRUE);
6061
6062 /* No associated normal symbol or it is neither global nor weak. */
6063 if (!hash
6064 || (hash->root.root.type != bfd_link_hash_defined
6065 && hash->root.root.type != bfd_link_hash_defweak)
6066 || hash->root.type != STT_FUNC)
6067 {
6068 /* Initialize here to avoid warning about use of possibly
6069 uninitialized variable. */
6070 j = 0;
6071
6072 if (!hash)
6073 {
6074 /* Searching for a normal symbol with local binding. */
6075 for (; j < ext_start; j++)
6076 {
6077 lsym_name =
6078 bfd_elf_string_from_elf_section (input_bfd,
6079 symtab_hdr->sh_link,
6080 local_syms[j].st_name);
6081 if (!strcmp (sym_name, lsym_name))
6082 break;
6083 }
6084 }
6085
6086 if (hash || j < ext_start)
6087 {
4eca0228 6088 _bfd_error_handler
90b6238f
AM		 6089 (_("%pB: invalid standard symbol `%s'; it must be "
6090 "a global or weak function symbol"),
6091 input_bfd, sym_name);
4ba2ef8f
TP		 6092 }
6093 else
4eca0228 6094 _bfd_error_handler
90b6238f 6095 (_("%pB: absent standard symbol `%s'"), input_bfd, sym_name);
4ba2ef8f
TP		 6096 ret = FALSE;
6097 if (!hash)
6098 continue;
6099 }
6100
6101 sym_value = hash->root.root.u.def.value;
6102 section = hash->root.root.u.def.section;
6103
6104 if (cmse_hash->root.root.u.def.section != section)
6105 {
4eca0228 6106 _bfd_error_handler
90b6238f 6107 (_("%pB: `%s' and its special symbol are in different sections"),
4ba2ef8f
TP		 6108 input_bfd, sym_name);
6109 ret = FALSE;
6110 }
6111 if (cmse_hash->root.root.u.def.value != sym_value)
6112 continue; /* Ignore: could be an entry function starting with SG. */
6113
6114 /* If this section is a link-once section that will be discarded, then
6115 don't create any stubs. */
6116 if (section->output_section == NULL)
6117 {
4eca0228 6118 _bfd_error_handler
90b6238f 6119 (_("%pB: entry function `%s' not output"), input_bfd, sym_name);
4ba2ef8f
TP		 6120 continue;
6121 }
6122
6123 if (hash->root.size == 0)
6124 {
4eca0228 6125 _bfd_error_handler
90b6238f 6126 (_("%pB: entry function `%s' is empty"), input_bfd, sym_name);
4ba2ef8f
TP		 6127 ret = FALSE;
6128 }
6129
6130 if (!ret)
6131 continue;
6132 branch_type = ARM_GET_SYM_BRANCH_TYPE (hash->root.target_internal);
0955507f 6133 stub_entry
4ba2ef8f
TP		 6134 = elf32_arm_create_stub (htab, arm_stub_cmse_branch_thumb_only,
6135 NULL, NULL, section, hash, sym_name,
6136 sym_value, branch_type, &new_stub);
6137
0955507f 6138 if (stub_entry == NULL)
4ba2ef8f
TP		 6139 ret = FALSE;
6140 else
6141 {
6142 BFD_ASSERT (new_stub);
0955507f 6143 (*cmse_stub_created)++;
4ba2ef8f
TP		 6144 }
6145 }
6146
6147 if (!symtab_hdr->contents)
6148 free (local_syms);
6149 return ret;
6150}
6151
0955507f
TP		 6152/* Return TRUE iff a symbol identified by its linker HASH entry is a secure
6153 code entry function, ie can be called from non secure code without using a
6154 veneer. */
6155
6156static bfd_boolean
6157cmse_entry_fct_p (struct elf32_arm_link_hash_entry *hash)
6158{
42484486 6159 bfd_byte contents[4];
0955507f
TP		 6160 uint32_t first_insn;
6161 asection *section;
6162 file_ptr offset;
6163 bfd *abfd;
6164
6165 /* Defined symbol of function type. */
6166 if (hash->root.root.type != bfd_link_hash_defined
6167 && hash->root.root.type != bfd_link_hash_defweak)
6168 return FALSE;
6169 if (hash->root.type != STT_FUNC)
6170 return FALSE;
6171
6172 /* Read first instruction. */
6173 section = hash->root.root.u.def.section;
6174 abfd = section->owner;
6175 offset = hash->root.root.u.def.value - section->vma;
42484486
TP		 6176 if (!bfd_get_section_contents (abfd, section, contents, offset,
6177 sizeof (contents)))
0955507f
TP		 6178 return FALSE;
6179
42484486
TP		 6180 first_insn = bfd_get_32 (abfd, contents);
6181
6182 /* Starts by SG instruction. */
0955507f
TP		 6183 return first_insn == 0xe97fe97f;
6184}
6185
6186/* Output the name (in symbol table) of the veneer GEN_ENTRY if it is a new
6187 secure gateway veneers (ie. the veneers was not in the input import library)
6188 and there is no output import library (GEN_INFO->out_implib_bfd is NULL. */
6189
6190static bfd_boolean
6191arm_list_new_cmse_stub (struct bfd_hash_entry *gen_entry, void *gen_info)
6192{
6193 struct elf32_arm_stub_hash_entry *stub_entry;
6194 struct bfd_link_info *info;
6195
6196 /* Massage our args to the form they really have. */
6197 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
6198 info = (struct bfd_link_info *) gen_info;
6199
6200 if (info->out_implib_bfd)
6201 return TRUE;
6202
6203 if (stub_entry->stub_type != arm_stub_cmse_branch_thumb_only)
6204 return TRUE;
6205
6206 if (stub_entry->stub_offset == (bfd_vma) -1)
4eca0228 6207 _bfd_error_handler (" %s", stub_entry->output_name);
0955507f
TP		 6208
6209 return TRUE;
6210}
6211
6212/* Set offset of each secure gateway veneers so that its address remain
6213 identical to the one in the input import library referred by
6214 HTAB->in_implib_bfd. A warning is issued for veneers that disappeared
6215 (present in input import library but absent from the executable being
6216 linked) or if new veneers appeared and there is no output import library
6217 (INFO->out_implib_bfd is NULL and *CMSE_STUB_CREATED is bigger than the
6218 number of secure gateway veneers found in the input import library.
6219
6220 The function returns whether an error occurred. If no error occurred,
6221 *CMSE_STUB_CREATED gives the number of SG veneers created by both cmse_scan
6222 and this function and HTAB->new_cmse_stub_offset is set to the biggest
6223 veneer observed set for new veneers to be layed out after. */
6224
6225static bfd_boolean
6226set_cmse_veneer_addr_from_implib (struct bfd_link_info *info,
6227 struct elf32_arm_link_hash_table *htab,
6228 int *cmse_stub_created)
6229{
6230 long symsize;
6231 char *sym_name;
6232 flagword flags;
6233 long i, symcount;
6234 bfd *in_implib_bfd;
6235 asection *stub_out_sec;
6236 bfd_boolean ret = TRUE;
6237 Elf_Internal_Sym *intsym;
6238 const char *out_sec_name;
6239 bfd_size_type cmse_stub_size;
6240 asymbol **sympp = NULL, *sym;
6241 struct elf32_arm_link_hash_entry *hash;
6242 const insn_sequence *cmse_stub_template;
6243 struct elf32_arm_stub_hash_entry *stub_entry;
6244 int cmse_stub_template_size, new_cmse_stubs_created = *cmse_stub_created;
6245 bfd_vma veneer_value, stub_offset, next_cmse_stub_offset;
6246 bfd_vma cmse_stub_array_start = (bfd_vma) -1, cmse_stub_sec_vma = 0;
6247
6248 /* No input secure gateway import library. */
6249 if (!htab->in_implib_bfd)
6250 return TRUE;
6251
6252 in_implib_bfd = htab->in_implib_bfd;
6253 if (!htab->cmse_implib)
6254 {
871b3ab2 6255 _bfd_error_handler (_("%pB: --in-implib only supported for Secure "
90b6238f 6256 "Gateway import libraries"), in_implib_bfd);
0955507f
TP		 6257 return FALSE;
6258 }
6259
6260 /* Get symbol table size. */
6261 symsize = bfd_get_symtab_upper_bound (in_implib_bfd);
6262 if (symsize < 0)
6263 return FALSE;
6264
6265 /* Read in the input secure gateway import library's symbol table. */
9a733151
AM		 6266 sympp = (asymbol **) bfd_malloc (symsize);
6267 if (sympp == NULL)
6268 return FALSE;
6269
0955507f
TP		 6270 symcount = bfd_canonicalize_symtab (in_implib_bfd, sympp);
6271 if (symcount < 0)
6272 {
6273 ret = FALSE;
6274 goto free_sym_buf;
6275 }
6276
6277 htab->new_cmse_stub_offset = 0;
6278 cmse_stub_size =
6279 find_stub_size_and_template (arm_stub_cmse_branch_thumb_only,
6280 &cmse_stub_template,
6281 &cmse_stub_template_size);
6282 out_sec_name =
6283 arm_dedicated_stub_output_section_name (arm_stub_cmse_branch_thumb_only);
6284 stub_out_sec =
6285 bfd_get_section_by_name (htab->obfd, out_sec_name);
6286 if (stub_out_sec != NULL)
6287 cmse_stub_sec_vma = stub_out_sec->vma;
6288
6289 /* Set addresses of veneers mentionned in input secure gateway import
6290 library's symbol table. */
6291 for (i = 0; i < symcount; i++)
6292 {
6293 sym = sympp[i];
6294 flags = sym->flags;
6295 sym_name = (char *) bfd_asymbol_name (sym);
6296 intsym = &((elf_symbol_type *) sym)->internal_elf_sym;
6297
6298 if (sym->section != bfd_abs_section_ptr
6299 || !(flags & (BSF_GLOBAL | BSF_WEAK))
6300 || (flags & BSF_FUNCTION) != BSF_FUNCTION
6301 || (ARM_GET_SYM_BRANCH_TYPE (intsym->st_target_internal)
6302 != ST_BRANCH_TO_THUMB))
6303 {
90b6238f
AM		 6304 _bfd_error_handler (_("%pB: invalid import library entry: `%s'; "
6305 "symbol should be absolute, global and "
6306 "refer to Thumb functions"),
4eca0228 6307 in_implib_bfd, sym_name);
0955507f
TP		 6308 ret = FALSE;
6309 continue;
6310 }
6311
6312 veneer_value = bfd_asymbol_value (sym);
6313 stub_offset = veneer_value - cmse_stub_sec_vma;
6314 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, sym_name,
6315 FALSE, FALSE);
6316 hash = (struct elf32_arm_link_hash_entry *)
6317 elf_link_hash_lookup (&(htab)->root, sym_name, FALSE, FALSE, TRUE);
6318
6319 /* Stub entry should have been created by cmse_scan or the symbol be of
6320 a secure function callable from non secure code. */
6321 if (!stub_entry && !hash)
6322 {
6323 bfd_boolean new_stub;
6324
4eca0228 6325 _bfd_error_handler
90b6238f 6326 (_("entry function `%s' disappeared from secure code"), sym_name);
0955507f
TP		 6327 hash = (struct elf32_arm_link_hash_entry *)
6328 elf_link_hash_lookup (&(htab)->root, sym_name, TRUE, TRUE, TRUE);
6329 stub_entry
6330 = elf32_arm_create_stub (htab, arm_stub_cmse_branch_thumb_only,
6331 NULL, NULL, bfd_abs_section_ptr, hash,
6332 sym_name, veneer_value,
6333 ST_BRANCH_TO_THUMB, &new_stub);
6334 if (stub_entry == NULL)
6335 ret = FALSE;
6336 else
6337 {
6338 BFD_ASSERT (new_stub);
6339 new_cmse_stubs_created++;
6340 (*cmse_stub_created)++;
6341 }
6342 stub_entry->stub_template_size = stub_entry->stub_size = 0;
6343 stub_entry->stub_offset = stub_offset;
6344 }
6345 /* Symbol found is not callable from non secure code. */
6346 else if (!stub_entry)
6347 {
6348 if (!cmse_entry_fct_p (hash))
6349 {
90b6238f 6350 _bfd_error_handler (_("`%s' refers to a non entry function"),
4eca0228 6351 sym_name);
0955507f
TP		 6352 ret = FALSE;
6353 }
6354 continue;
6355 }
6356 else
6357 {
6358 /* Only stubs for SG veneers should have been created. */
6359 BFD_ASSERT (stub_entry->stub_type == arm_stub_cmse_branch_thumb_only);
6360
6361 /* Check visibility hasn't changed. */
6362 if (!!(flags & BSF_GLOBAL)
6363 != (hash->root.root.type == bfd_link_hash_defined))
4eca0228 6364 _bfd_error_handler
90b6238f 6365 (_("%pB: visibility of symbol `%s' has changed"), in_implib_bfd,
0955507f
TP		 6366 sym_name);
6367
6368 stub_entry->stub_offset = stub_offset;
6369 }
6370
6371 /* Size should match that of a SG veneer. */
6372 if (intsym->st_size != cmse_stub_size)
6373 {
90b6238f 6374 _bfd_error_handler (_("%pB: incorrect size for symbol `%s'"),
4eca0228 6375 in_implib_bfd, sym_name);
0955507f
TP		 6376 ret = FALSE;
6377 }
6378
6379 /* Previous veneer address is before current SG veneer section. */
6380 if (veneer_value < cmse_stub_sec_vma)
6381 {
6382 /* Avoid offset underflow. */
6383 if (stub_entry)
6384 stub_entry->stub_offset = 0;
6385 stub_offset = 0;
6386 ret = FALSE;
6387 }
6388
6389 /* Complain if stub offset not a multiple of stub size. */
6390 if (stub_offset % cmse_stub_size)
6391 {
4eca0228 6392 _bfd_error_handler
90b6238f
AM		 6393 (_("offset of veneer for entry function `%s' not a multiple of "
6394 "its size"), sym_name);
0955507f
TP		 6395 ret = FALSE;
6396 }
6397
6398 if (!ret)
6399 continue;
6400
6401 new_cmse_stubs_created--;
6402 if (veneer_value < cmse_stub_array_start)
6403 cmse_stub_array_start = veneer_value;
6404 next_cmse_stub_offset = stub_offset + ((cmse_stub_size + 7) & ~7);
6405 if (next_cmse_stub_offset > htab->new_cmse_stub_offset)
6406 htab->new_cmse_stub_offset = next_cmse_stub_offset;
6407 }
6408
6409 if (!info->out_implib_bfd && new_cmse_stubs_created != 0)
6410 {
6411 BFD_ASSERT (new_cmse_stubs_created > 0);
4eca0228 6412 _bfd_error_handler
0955507f
TP		 6413 (_("new entry function(s) introduced but no output import library "
6414 "specified:"));
6415 bfd_hash_traverse (&htab->stub_hash_table, arm_list_new_cmse_stub, info);
6416 }
6417
6418 if (cmse_stub_array_start != cmse_stub_sec_vma)
6419 {
4eca0228 6420 _bfd_error_handler
90b6238f 6421 (_("start address of `%s' is different from previous link"),
0955507f
TP		 6422 out_sec_name);
6423 ret = FALSE;
6424 }
6425
dc1e8a47 6426 free_sym_buf:
0955507f
TP		 6427 free (sympp);
6428 return ret;
6429}
6430
906e58ca
NC		 6431/* Determine and set the size of the stub section for a final link.
6432
6433 The basic idea here is to examine all the relocations looking for
6434 PC-relative calls to a target that is unreachable with a "bl"
6435 instruction. */
6436
6437bfd_boolean
6438elf32_arm_size_stubs (bfd *output_bfd,
6439 bfd *stub_bfd,
6440 struct bfd_link_info *info,
6441 bfd_signed_vma group_size,
7a89b94e 6442 asection * (*add_stub_section) (const char *, asection *,
6bde4c52 6443 asection *,
7a89b94e 6444 unsigned int),
906e58ca
NC		 6445 void (*layout_sections_again) (void))
6446{
0955507f 6447 bfd_boolean ret = TRUE;
4ba2ef8f 6448 obj_attribute *out_attr;
0955507f 6449 int cmse_stub_created = 0;
906e58ca 6450 bfd_size_type stub_group_size;
4ba2ef8f 6451 bfd_boolean m_profile, stubs_always_after_branch, first_veneer_scan = TRUE;
906e58ca 6452 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
48229727 6453 struct a8_erratum_fix *a8_fixes = NULL;
eb7c4339 6454 unsigned int num_a8_fixes = 0, a8_fix_table_size = 10;
48229727
JB		 6455 struct a8_erratum_reloc *a8_relocs = NULL;
6456 unsigned int num_a8_relocs = 0, a8_reloc_table_size = 10, i;
6457
4dfe6ac6
NC		 6458 if (htab == NULL)
6459 return FALSE;
6460
48229727
JB		 6461 if (htab->fix_cortex_a8)
6462 {
21d799b5 6463 a8_fixes = (struct a8_erratum_fix *)
99059e56 6464 bfd_zmalloc (sizeof (struct a8_erratum_fix) * a8_fix_table_size);
21d799b5 6465 a8_relocs = (struct a8_erratum_reloc *)
99059e56 6466 bfd_zmalloc (sizeof (struct a8_erratum_reloc) * a8_reloc_table_size);
48229727 6467 }
906e58ca
NC		 6468
6469 /* Propagate mach to stub bfd, because it may not have been
6470 finalized when we created stub_bfd. */
6471 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
6472 bfd_get_mach (output_bfd));
6473
6474 /* Stash our params away. */
6475 htab->stub_bfd = stub_bfd;
6476 htab->add_stub_section = add_stub_section;
6477 htab->layout_sections_again = layout_sections_again;
07d72278 6478 stubs_always_after_branch = group_size < 0;
48229727 6479
4ba2ef8f
TP		 6480 out_attr = elf_known_obj_attributes_proc (output_bfd);
6481 m_profile = out_attr[Tag_CPU_arch_profile].i == 'M';
0955507f 6482
48229727
JB		 6483 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
6484 as the first half of a 32-bit branch straddling two 4K pages. This is a
6485 crude way of enforcing that. */
6486 if (htab->fix_cortex_a8)
6487 stubs_always_after_branch = 1;
6488
906e58ca
NC		 6489 if (group_size < 0)
6490 stub_group_size = -group_size;
6491 else
6492 stub_group_size = group_size;
6493
6494 if (stub_group_size == 1)
6495 {
6496 /* Default values. */
6497 /* Thumb branch range is +-4MB has to be used as the default
6498 maximum size (a given section can contain both ARM and Thumb
6499 code, so the worst case has to be taken into account).
6500
6501 This value is 24K less than that, which allows for 2025
6502 12-byte stubs. If we exceed that, then we will fail to link.
6503 The user will have to relink with an explicit group size
6504 option. */
6505 stub_group_size = 4170000;
6506 }
6507
07d72278 6508 group_sections (htab, stub_group_size, stubs_always_after_branch);
906e58ca 6509
3ae046cc
NS		 6510 /* If we're applying the cortex A8 fix, we need to determine the
6511 program header size now, because we cannot change it later --
6512 that could alter section placements. Notice the A8 erratum fix
6513 ends up requiring the section addresses to remain unchanged
6514 modulo the page size. That's something we cannot represent
6515 inside BFD, and we don't want to force the section alignment to
6516 be the page size. */
6517 if (htab->fix_cortex_a8)
6518 (*htab->layout_sections_again) ();
6519
906e58ca
NC		 6520 while (1)
6521 {
6522 bfd *input_bfd;
6523 unsigned int bfd_indx;
6524 asection *stub_sec;
d7c5bd02 6525 enum elf32_arm_stub_type stub_type;
eb7c4339
NS		 6526 bfd_boolean stub_changed = FALSE;
6527 unsigned prev_num_a8_fixes = num_a8_fixes;
906e58ca 6528
48229727 6529 num_a8_fixes = 0;
906e58ca
NC		 6530 for (input_bfd = info->input_bfds, bfd_indx = 0;
6531 input_bfd != NULL;
c72f2fb2 6532 input_bfd = input_bfd->link.next, bfd_indx++)
906e58ca
NC		 6533 {
6534 Elf_Internal_Shdr *symtab_hdr;
6535 asection *section;
6536 Elf_Internal_Sym *local_syms = NULL;
6537
73d5efd7
AM		 6538 if (!is_arm_elf (input_bfd))
6539 continue;
6540 if ((input_bfd->flags & DYNAMIC) != 0
6541 && (elf_sym_hashes (input_bfd) == NULL
6542 || (elf_dyn_lib_class (input_bfd) & DYN_AS_NEEDED) != 0))
99059e56 6543 continue;
adbcc655 6544
48229727
JB		 6545 num_a8_relocs = 0;
6546
906e58ca
NC		 6547 /* We'll need the symbol table in a second. */
6548 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6549 if (symtab_hdr->sh_info == 0)
6550 continue;
6551
4ba2ef8f
TP		 6552 /* Limit scan of symbols to object file whose profile is
6553 Microcontroller to not hinder performance in the general case. */
6554 if (m_profile && first_veneer_scan)
6555 {
6556 struct elf_link_hash_entry **sym_hashes;
6557
6558 sym_hashes = elf_sym_hashes (input_bfd);
6559 if (!cmse_scan (input_bfd, htab, out_attr, sym_hashes,
0955507f 6560 &cmse_stub_created))
4ba2ef8f 6561 goto error_ret_free_local;
0955507f
TP		 6562
6563 if (cmse_stub_created != 0)
6564 stub_changed = TRUE;
4ba2ef8f
TP		 6565 }
6566
906e58ca
NC		 6567 /* Walk over each section attached to the input bfd. */
6568 for (section = input_bfd->sections;
6569 section != NULL;
6570 section = section->next)
6571 {
6572 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6573
6574 /* If there aren't any relocs, then there's nothing more
6575 to do. */
6576 if ((section->flags & SEC_RELOC) == 0
6577 || section->reloc_count == 0
6578 || (section->flags & SEC_CODE) == 0)
6579 continue;
6580
6581 /* If this section is a link-once section that will be
6582 discarded, then don't create any stubs. */
6583 if (section->output_section == NULL
6584 || section->output_section->owner != output_bfd)
6585 continue;
6586
6587 /* Get the relocs. */
6588 internal_relocs
6589 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
6590 NULL, info->keep_memory);
6591 if (internal_relocs == NULL)
6592 goto error_ret_free_local;
6593
6594 /* Now examine each relocation. */
6595 irela = internal_relocs;
6596 irelaend = irela + section->reloc_count;
6597 for (; irela < irelaend; irela++)
6598 {
6599 unsigned int r_type, r_indx;
906e58ca
NC		 6600 asection *sym_sec;
6601 bfd_vma sym_value;
6602 bfd_vma destination;
6603 struct elf32_arm_link_hash_entry *hash;
7413f23f 6604 const char *sym_name;
34e77a92 6605 unsigned char st_type;
35fc36a8 6606 enum arm_st_branch_type branch_type;
48229727 6607 bfd_boolean created_stub = FALSE;
906e58ca
NC		 6608
6609 r_type = ELF32_R_TYPE (irela->r_info);
6610 r_indx = ELF32_R_SYM (irela->r_info);
6611
6612 if (r_type >= (unsigned int) R_ARM_max)
6613 {
6614 bfd_set_error (bfd_error_bad_value);
6615 error_ret_free_internal:
6616 if (elf_section_data (section)->relocs == NULL)
6617 free (internal_relocs);
15dd01b1
TP		 6618 /* Fall through. */
6619 error_ret_free_local:
6620 if (local_syms != NULL
6621 && (symtab_hdr->contents
6622 != (unsigned char *) local_syms))
6623 free (local_syms);
6624 return FALSE;
906e58ca 6625 }
b38cadfb 6626
0855e32b
NS		 6627 hash = NULL;
6628 if (r_indx >= symtab_hdr->sh_info)
6629 hash = elf32_arm_hash_entry
6630 (elf_sym_hashes (input_bfd)
6631 [r_indx - symtab_hdr->sh_info]);
b38cadfb 6632
0855e32b
NS		 6633 /* Only look for stubs on branch instructions, or
6634 non-relaxed TLSCALL */
906e58ca 6635 if ((r_type != (unsigned int) R_ARM_CALL)
155d87d7
CL		 6636 && (r_type != (unsigned int) R_ARM_THM_CALL)
6637 && (r_type != (unsigned int) R_ARM_JUMP24)
48229727
JB		 6638 && (r_type != (unsigned int) R_ARM_THM_JUMP19)
6639 && (r_type != (unsigned int) R_ARM_THM_XPC22)
155d87d7 6640 && (r_type != (unsigned int) R_ARM_THM_JUMP24)
0855e32b
NS		 6641 && (r_type != (unsigned int) R_ARM_PLT32)
6642 && !((r_type == (unsigned int) R_ARM_TLS_CALL
6643 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
6644 && r_type == elf32_arm_tls_transition
6645 (info, r_type, &hash->root)
6646 && ((hash ? hash->tls_type
6647 : (elf32_arm_local_got_tls_type
6648 (input_bfd)[r_indx]))
6649 & GOT_TLS_GDESC) != 0))
906e58ca
NC		 6650 continue;
6651
6652 /* Now determine the call target, its name, value,
6653 section. */
6654 sym_sec = NULL;
6655 sym_value = 0;
6656 destination = 0;
7413f23f 6657 sym_name = NULL;
b38cadfb 6658
0855e32b
NS		 6659 if (r_type == (unsigned int) R_ARM_TLS_CALL
6660 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
6661 {
6662 /* A non-relaxed TLS call. The target is the
6663 plt-resident trampoline and nothing to do
6664 with the symbol. */
6665 BFD_ASSERT (htab->tls_trampoline > 0);
6666 sym_sec = htab->root.splt;
6667 sym_value = htab->tls_trampoline;
6668 hash = 0;
34e77a92 6669 st_type = STT_FUNC;
35fc36a8 6670 branch_type = ST_BRANCH_TO_ARM;
0855e32b
NS		 6671 }
6672 else if (!hash)
906e58ca
NC		 6673 {
6674 /* It's a local symbol. */
6675 Elf_Internal_Sym *sym;
906e58ca
NC		 6676
6677 if (local_syms == NULL)
6678 {
6679 local_syms
6680 = (Elf_Internal_Sym *) symtab_hdr->contents;
6681 if (local_syms == NULL)
6682 local_syms
6683 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
6684 symtab_hdr->sh_info, 0,
6685 NULL, NULL, NULL);
6686 if (local_syms == NULL)
6687 goto error_ret_free_internal;
6688 }
6689
6690 sym = local_syms + r_indx;
f6d250ce
TS		 6691 if (sym->st_shndx == SHN_UNDEF)
6692 sym_sec = bfd_und_section_ptr;
6693 else if (sym->st_shndx == SHN_ABS)
6694 sym_sec = bfd_abs_section_ptr;
6695 else if (sym->st_shndx == SHN_COMMON)
6696 sym_sec = bfd_com_section_ptr;
6697 else
6698 sym_sec =
6699 bfd_section_from_elf_index (input_bfd, sym->st_shndx);
6700
ffcb4889
NS		 6701 if (!sym_sec)
6702 /* This is an undefined symbol. It can never
6a631e86 6703 be resolved. */
ffcb4889 6704 continue;
fe33d2fa 6705
906e58ca
NC		 6706 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
6707 sym_value = sym->st_value;
6708 destination = (sym_value + irela->r_addend
6709 + sym_sec->output_offset
6710 + sym_sec->output_section->vma);
34e77a92 6711 st_type = ELF_ST_TYPE (sym->st_info);
39d911fc
TP		 6712 branch_type =
6713 ARM_GET_SYM_BRANCH_TYPE (sym->st_target_internal);
7413f23f
DJ		 6714 sym_name
6715 = bfd_elf_string_from_elf_section (input_bfd,
6716 symtab_hdr->sh_link,
6717 sym->st_name);
906e58ca
NC		 6718 }
6719 else
6720 {
6721 /* It's an external symbol. */
906e58ca
NC		 6722 while (hash->root.root.type == bfd_link_hash_indirect
6723 || hash->root.root.type == bfd_link_hash_warning)
6724 hash = ((struct elf32_arm_link_hash_entry *)
6725 hash->root.root.u.i.link);
6726
6727 if (hash->root.root.type == bfd_link_hash_defined
6728 || hash->root.root.type == bfd_link_hash_defweak)
6729 {
6730 sym_sec = hash->root.root.u.def.section;
6731 sym_value = hash->root.root.u.def.value;
022f8312
CL		 6732
6733 struct elf32_arm_link_hash_table *globals =
6734 elf32_arm_hash_table (info);
6735
6736 /* For a destination in a shared library,
6737 use the PLT stub as target address to
6738 decide whether a branch stub is
6739 needed. */
4dfe6ac6 6740 if (globals != NULL
362d30a1 6741 && globals->root.splt != NULL
4dfe6ac6 6742 && hash != NULL
022f8312
CL		 6743 && hash->root.plt.offset != (bfd_vma) -1)
6744 {
362d30a1 6745 sym_sec = globals->root.splt;
022f8312
CL		 6746 sym_value = hash->root.plt.offset;
6747 if (sym_sec->output_section != NULL)
6748 destination = (sym_value
6749 + sym_sec->output_offset
6750 + sym_sec->output_section->vma);
6751 }
6752 else if (sym_sec->output_section != NULL)
906e58ca
NC		 6753 destination = (sym_value + irela->r_addend
6754 + sym_sec->output_offset
6755 + sym_sec->output_section->vma);
6756 }
69c5861e
CL		 6757 else if ((hash->root.root.type == bfd_link_hash_undefined)
6758 || (hash->root.root.type == bfd_link_hash_undefweak))
6759 {
6760 /* For a shared library, use the PLT stub as
6761 target address to decide whether a long
6762 branch stub is needed.
6763 For absolute code, they cannot be handled. */
6764 struct elf32_arm_link_hash_table *globals =
6765 elf32_arm_hash_table (info);
6766
4dfe6ac6 6767 if (globals != NULL
362d30a1 6768 && globals->root.splt != NULL
4dfe6ac6 6769 && hash != NULL
69c5861e
CL		 6770 && hash->root.plt.offset != (bfd_vma) -1)
6771 {
362d30a1 6772 sym_sec = globals->root.splt;
69c5861e
CL		 6773 sym_value = hash->root.plt.offset;
6774 if (sym_sec->output_section != NULL)
6775 destination = (sym_value
6776 + sym_sec->output_offset
6777 + sym_sec->output_section->vma);
6778 }
6779 else
6780 continue;
6781 }
906e58ca
NC		 6782 else
6783 {
6784 bfd_set_error (bfd_error_bad_value);
6785 goto error_ret_free_internal;
6786 }
34e77a92 6787 st_type = hash->root.type;
39d911fc
TP		 6788 branch_type =
6789 ARM_GET_SYM_BRANCH_TYPE (hash->root.target_internal);
7413f23f 6790 sym_name = hash->root.root.root.string;
906e58ca
NC		 6791 }
6792
48229727 6793 do
7413f23f 6794 {
b715f643 6795 bfd_boolean new_stub;
0955507f 6796 struct elf32_arm_stub_hash_entry *stub_entry;
b715f643 6797
48229727
JB		 6798 /* Determine what (if any) linker stub is needed. */
6799 stub_type = arm_type_of_stub (info, section, irela,
34e77a92
RS		 6800 st_type, &branch_type,
6801 hash, destination, sym_sec,
48229727
JB		 6802 input_bfd, sym_name);
6803 if (stub_type == arm_stub_none)
6804 break;
6805
48229727
JB		 6806 /* We've either created a stub for this reloc already,
6807 or we are about to. */
0955507f 6808 stub_entry =
b715f643
TP		 6809 elf32_arm_create_stub (htab, stub_type, section, irela,
6810 sym_sec, hash,
6811 (char *) sym_name, sym_value,
6812 branch_type, &new_stub);
7413f23f 6813
0955507f 6814 created_stub = stub_entry != NULL;
b715f643
TP		 6815 if (!created_stub)
6816 goto error_ret_free_internal;
6817 else if (!new_stub)
6818 break;
99059e56 6819 else
b715f643 6820 stub_changed = TRUE;
99059e56
RM		 6821 }
6822 while (0);
6823
6824 /* Look for relocations which might trigger Cortex-A8
6825 erratum. */
6826 if (htab->fix_cortex_a8
6827 && (r_type == (unsigned int) R_ARM_THM_JUMP24
6828 || r_type == (unsigned int) R_ARM_THM_JUMP19
6829 || r_type == (unsigned int) R_ARM_THM_CALL
6830 || r_type == (unsigned int) R_ARM_THM_XPC22))
6831 {
6832 bfd_vma from = section->output_section->vma
6833 + section->output_offset
6834 + irela->r_offset;
6835
6836 if ((from & 0xfff) == 0xffe)
6837 {
6838 /* Found a candidate. Note we haven't checked the
6839 destination is within 4K here: if we do so (and
6840 don't create an entry in a8_relocs) we can't tell
6841 that a branch should have been relocated when
6842 scanning later. */
6843 if (num_a8_relocs == a8_reloc_table_size)
6844 {
6845 a8_reloc_table_size *= 2;
6846 a8_relocs = (struct a8_erratum_reloc *)
6847 bfd_realloc (a8_relocs,
6848 sizeof (struct a8_erratum_reloc)
6849 * a8_reloc_table_size);
6850 }
6851
6852 a8_relocs[num_a8_relocs].from = from;
6853 a8_relocs[num_a8_relocs].destination = destination;
6854 a8_relocs[num_a8_relocs].r_type = r_type;
6855 a8_relocs[num_a8_relocs].branch_type = branch_type;
6856 a8_relocs[num_a8_relocs].sym_name = sym_name;
6857 a8_relocs[num_a8_relocs].non_a8_stub = created_stub;
6858 a8_relocs[num_a8_relocs].hash = hash;
6859
6860 num_a8_relocs++;
6861 }
6862 }
906e58ca
NC		 6863 }
6864
99059e56
RM		 6865 /* We're done with the internal relocs, free them. */
6866 if (elf_section_data (section)->relocs == NULL)
6867 free (internal_relocs);
6868 }
48229727 6869
99059e56 6870 if (htab->fix_cortex_a8)
48229727 6871 {
99059e56
RM		 6872 /* Sort relocs which might apply to Cortex-A8 erratum. */
6873 qsort (a8_relocs, num_a8_relocs,
eb7c4339 6874 sizeof (struct a8_erratum_reloc),
99059e56 6875 &a8_reloc_compare);
48229727 6876
99059e56
RM		 6877 /* Scan for branches which might trigger Cortex-A8 erratum. */
6878 if (cortex_a8_erratum_scan (input_bfd, info, &a8_fixes,
48229727 6879 &num_a8_fixes, &a8_fix_table_size,
eb7c4339
NS		 6880 a8_relocs, num_a8_relocs,
6881 prev_num_a8_fixes, &stub_changed)
6882 != 0)
48229727 6883 goto error_ret_free_local;
5e681ec4 6884 }
7f991970
AM		 6885
6886 if (local_syms != NULL
6887 && symtab_hdr->contents != (unsigned char *) local_syms)
6888 {
6889 if (!info->keep_memory)
6890 free (local_syms);
6891 else
6892 symtab_hdr->contents = (unsigned char *) local_syms;
6893 }
5e681ec4
PB		 6894 }
6895
0955507f
TP		 6896 if (first_veneer_scan
6897 && !set_cmse_veneer_addr_from_implib (info, htab,
6898 &cmse_stub_created))
6899 ret = FALSE;
6900
eb7c4339 6901 if (prev_num_a8_fixes != num_a8_fixes)
99059e56 6902 stub_changed = TRUE;
48229727 6903
906e58ca
NC		 6904 if (!stub_changed)
6905 break;
5e681ec4 6906
906e58ca
NC		 6907 /* OK, we've added some stubs. Find out the new size of the
6908 stub sections. */
6909 for (stub_sec = htab->stub_bfd->sections;
6910 stub_sec != NULL;
6911 stub_sec = stub_sec->next)
3e6b1042
DJ		 6912 {
6913 /* Ignore non-stub sections. */
6914 if (!strstr (stub_sec->name, STUB_SUFFIX))
6915 continue;
6916
6917 stub_sec->size = 0;
6918 }
b34b2d70 6919
0955507f
TP		 6920 /* Add new SG veneers after those already in the input import
6921 library. */
6922 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type;
6923 stub_type++)
6924 {
6925 bfd_vma *start_offset_p;
6926 asection **stub_sec_p;
6927
6928 start_offset_p = arm_new_stubs_start_offset_ptr (htab, stub_type);
6929 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
6930 if (start_offset_p == NULL)
6931 continue;
6932
6933 BFD_ASSERT (stub_sec_p != NULL);
6934 if (*stub_sec_p != NULL)
6935 (*stub_sec_p)->size = *start_offset_p;
6936 }
6937
d7c5bd02 6938 /* Compute stub section size, considering padding. */
906e58ca 6939 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
d7c5bd02
TP		 6940 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type;
6941 stub_type++)
6942 {
6943 int size, padding;
6944 asection **stub_sec_p;
6945
6946 padding = arm_dedicated_stub_section_padding (stub_type);
6947 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
6948 /* Skip if no stub input section or no stub section padding
6949 required. */
6950 if ((stub_sec_p != NULL && *stub_sec_p == NULL) || padding == 0)
6951 continue;
6952 /* Stub section padding required but no dedicated section. */
6953 BFD_ASSERT (stub_sec_p);
6954
6955 size = (*stub_sec_p)->size;
6956 size = (size + padding - 1) & ~(padding - 1);
6957 (*stub_sec_p)->size = size;
6958 }
906e58ca 6959
48229727
JB		 6960 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
6961 if (htab->fix_cortex_a8)
99059e56
RM		 6962 for (i = 0; i < num_a8_fixes; i++)
6963 {
48229727 6964 stub_sec = elf32_arm_create_or_find_stub_sec (NULL,
daa4adae 6965 a8_fixes[i].section, htab, a8_fixes[i].stub_type);
48229727
JB		 6966
6967 if (stub_sec == NULL)
7f991970 6968 return FALSE;
48229727 6969
99059e56
RM		 6970 stub_sec->size
6971 += find_stub_size_and_template (a8_fixes[i].stub_type, NULL,
6972 NULL);
6973 }
48229727
JB		 6974
6975
906e58ca
NC		 6976 /* Ask the linker to do its stuff. */
6977 (*htab->layout_sections_again) ();
4ba2ef8f 6978 first_veneer_scan = FALSE;
ba93b8ac
DJ		 6979 }
6980
48229727
JB		 6981 /* Add stubs for Cortex-A8 erratum fixes now. */
6982 if (htab->fix_cortex_a8)
6983 {
6984 for (i = 0; i < num_a8_fixes; i++)
99059e56
RM		 6985 {
6986 struct elf32_arm_stub_hash_entry *stub_entry;
6987 char *stub_name = a8_fixes[i].stub_name;
6988 asection *section = a8_fixes[i].section;
6989 unsigned int section_id = a8_fixes[i].section->id;
6990 asection *link_sec = htab->stub_group[section_id].link_sec;
6991 asection *stub_sec = htab->stub_group[section_id].stub_sec;
6992 const insn_sequence *template_sequence;
6993 int template_size, size = 0;
6994
6995 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
6996 TRUE, FALSE);
6997 if (stub_entry == NULL)
6998 {
871b3ab2 6999 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
4eca0228 7000 section->owner, stub_name);
99059e56
RM		 7001 return FALSE;
7002 }
7003
7004 stub_entry->stub_sec = stub_sec;
0955507f 7005 stub_entry->stub_offset = (bfd_vma) -1;
99059e56
RM		 7006 stub_entry->id_sec = link_sec;
7007 stub_entry->stub_type = a8_fixes[i].stub_type;
8d9d9490 7008 stub_entry->source_value = a8_fixes[i].offset;
99059e56 7009 stub_entry->target_section = a8_fixes[i].section;
8d9d9490 7010 stub_entry->target_value = a8_fixes[i].target_offset;
99059e56 7011 stub_entry->orig_insn = a8_fixes[i].orig_insn;
35fc36a8 7012 stub_entry->branch_type = a8_fixes[i].branch_type;
48229727 7013
99059e56
RM		 7014 size = find_stub_size_and_template (a8_fixes[i].stub_type,
7015 &template_sequence,
7016 &template_size);
48229727 7017
99059e56
RM		 7018 stub_entry->stub_size = size;
7019 stub_entry->stub_template = template_sequence;
7020 stub_entry->stub_template_size = template_size;
7021 }
48229727
JB		 7022
7023 /* Stash the Cortex-A8 erratum fix array for use later in
99059e56 7024 elf32_arm_write_section(). */
48229727
JB		 7025 htab->a8_erratum_fixes = a8_fixes;
7026 htab->num_a8_erratum_fixes = num_a8_fixes;
7027 }
7028 else
7029 {
7030 htab->a8_erratum_fixes = NULL;
7031 htab->num_a8_erratum_fixes = 0;
7032 }
0955507f 7033 return ret;
5e681ec4
PB		 7034}
7035
906e58ca
NC		 7036/* Build all the stubs associated with the current output file. The
7037 stubs are kept in a hash table attached to the main linker hash
7038 table. We also set up the .plt entries for statically linked PIC
7039 functions here. This function is called via arm_elf_finish in the
7040 linker. */
252b5132 7041
906e58ca
NC		 7042bfd_boolean
7043elf32_arm_build_stubs (struct bfd_link_info *info)
252b5132 7044{
906e58ca
NC		 7045 asection *stub_sec;
7046 struct bfd_hash_table *table;
0955507f 7047 enum elf32_arm_stub_type stub_type;
906e58ca 7048 struct elf32_arm_link_hash_table *htab;
252b5132 7049
906e58ca 7050 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 7051 if (htab == NULL)
7052 return FALSE;
252b5132 7053
906e58ca
NC		 7054 for (stub_sec = htab->stub_bfd->sections;
7055 stub_sec != NULL;
7056 stub_sec = stub_sec->next)
252b5132 7057 {
906e58ca
NC		 7058 bfd_size_type size;
7059
8029a119 7060 /* Ignore non-stub sections. */
906e58ca
NC		 7061 if (!strstr (stub_sec->name, STUB_SUFFIX))
7062 continue;
7063
d7c5bd02 7064 /* Allocate memory to hold the linker stubs. Zeroing the stub sections
0955507f
TP		 7065 must at least be done for stub section requiring padding and for SG
7066 veneers to ensure that a non secure code branching to a removed SG
7067 veneer causes an error. */
906e58ca 7068 size = stub_sec->size;
21d799b5 7069 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
906e58ca
NC		 7070 if (stub_sec->contents == NULL && size != 0)
7071 return FALSE;
0955507f 7072
906e58ca 7073 stub_sec->size = 0;
252b5132
RH		 7074 }
7075
0955507f
TP		 7076 /* Add new SG veneers after those already in the input import library. */
7077 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type; stub_type++)
7078 {
7079 bfd_vma *start_offset_p;
7080 asection **stub_sec_p;
7081
7082 start_offset_p = arm_new_stubs_start_offset_ptr (htab, stub_type);
7083 stub_sec_p = arm_dedicated_stub_input_section_ptr (htab, stub_type);
7084 if (start_offset_p == NULL)
7085 continue;
7086
7087 BFD_ASSERT (stub_sec_p != NULL);
7088 if (*stub_sec_p != NULL)
7089 (*stub_sec_p)->size = *start_offset_p;
7090 }
7091
906e58ca
NC		 7092 /* Build the stubs as directed by the stub hash table. */
7093 table = &htab->stub_hash_table;
7094 bfd_hash_traverse (table, arm_build_one_stub, info);
eb7c4339
NS		 7095 if (htab->fix_cortex_a8)
7096 {
7097 /* Place the cortex a8 stubs last. */
7098 htab->fix_cortex_a8 = -1;
7099 bfd_hash_traverse (table, arm_build_one_stub, info);
7100 }
252b5132 7101
906e58ca 7102 return TRUE;
252b5132
RH		 7103}
7104
9b485d32
NC		 7105/* Locate the Thumb encoded calling stub for NAME. */
7106
252b5132 7107static struct elf_link_hash_entry *
57e8b36a
NC		 7108find_thumb_glue (struct bfd_link_info *link_info,
7109 const char *name,
f2a9dd69 7110 char **error_message)
252b5132
RH		 7111{
7112 char *tmp_name;
7113 struct elf_link_hash_entry *hash;
7114 struct elf32_arm_link_hash_table *hash_table;
7115
7116 /* We need a pointer to the armelf specific hash table. */
7117 hash_table = elf32_arm_hash_table (link_info);
4dfe6ac6
NC		 7118 if (hash_table == NULL)
7119 return NULL;
252b5132 7120
21d799b5 7121 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
99059e56 7122 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 7123
7124 BFD_ASSERT (tmp_name);
7125
7126 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
7127
7128 hash = elf_link_hash_lookup
b34976b6 7129 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132 7130
b1657152 7131 if (hash == NULL
90b6238f
AM		 7132 && asprintf (error_message, _("unable to find %s glue '%s' for '%s'"),
7133 "Thumb", tmp_name, name) == -1)
b1657152 7134 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
252b5132
RH		 7135
7136 free (tmp_name);
7137
7138 return hash;
7139}
7140
9b485d32
NC		 7141/* Locate the ARM encoded calling stub for NAME. */
7142
252b5132 7143static struct elf_link_hash_entry *
57e8b36a
NC		 7144find_arm_glue (struct bfd_link_info *link_info,
7145 const char *name,
f2a9dd69 7146 char **error_message)
252b5132
RH		 7147{
7148 char *tmp_name;
7149 struct elf_link_hash_entry *myh;
7150 struct elf32_arm_link_hash_table *hash_table;
7151
7152 /* We need a pointer to the elfarm specific hash table. */
7153 hash_table = elf32_arm_hash_table (link_info);
4dfe6ac6
NC		 7154 if (hash_table == NULL)
7155 return NULL;
252b5132 7156
21d799b5 7157 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
99059e56 7158 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 7159 BFD_ASSERT (tmp_name);
7160
7161 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
7162
7163 myh = elf_link_hash_lookup
b34976b6 7164 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132 7165
b1657152 7166 if (myh == NULL
90b6238f
AM		 7167 && asprintf (error_message, _("unable to find %s glue '%s' for '%s'"),
7168 "ARM", tmp_name, name) == -1)
b1657152 7169 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
252b5132
RH		 7170
7171 free (tmp_name);
7172
7173 return myh;
7174}
7175
8f6277f5 7176/* ARM->Thumb glue (static images):
252b5132
RH		 7177
7178 .arm
7179 __func_from_arm:
7180 ldr r12, __func_addr
7181 bx r12
7182 __func_addr:
906e58ca 7183 .word func @ behave as if you saw a ARM_32 reloc.
252b5132 7184
26079076
PB		 7185 (v5t static images)
7186 .arm
7187 __func_from_arm:
7188 ldr pc, __func_addr
7189 __func_addr:
906e58ca 7190 .word func @ behave as if you saw a ARM_32 reloc.
26079076 7191
8f6277f5
PB		 7192 (relocatable images)
7193 .arm
7194 __func_from_arm:
7195 ldr r12, __func_offset
7196 add r12, r12, pc
7197 bx r12
7198 __func_offset:
8029a119 7199 .word func - . */
8f6277f5
PB		 7200
7201#define ARM2THUMB_STATIC_GLUE_SIZE 12
252b5132
RH		 7202static const insn32 a2t1_ldr_insn = 0xe59fc000;
7203static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
7204static const insn32 a2t3_func_addr_insn = 0x00000001;
7205
26079076
PB		 7206#define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
7207static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
7208static const insn32 a2t2v5_func_addr_insn = 0x00000001;
7209
8f6277f5
PB		 7210#define ARM2THUMB_PIC_GLUE_SIZE 16
7211static const insn32 a2t1p_ldr_insn = 0xe59fc004;
7212static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
7213static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
7214
07d6d2b8 7215/* Thumb->ARM: Thumb->(non-interworking aware) ARM
252b5132 7216
07d6d2b8
AM		 7217 .thumb .thumb
7218 .align 2 .align 2
7219 __func_from_thumb: __func_from_thumb:
7220 bx pc push {r6, lr}
7221 nop ldr r6, __func_addr
7222 .arm mov lr, pc
7223 b func bx r6
99059e56
RM		 7224 .arm
7225 ;; back_to_thumb
7226 ldmia r13! {r6, lr}
7227 bx lr
7228 __func_addr:
07d6d2b8 7229 .word func */
252b5132
RH		 7230
7231#define THUMB2ARM_GLUE_SIZE 8
7232static const insn16 t2a1_bx_pc_insn = 0x4778;
7233static const insn16 t2a2_noop_insn = 0x46c0;
7234static const insn32 t2a3_b_insn = 0xea000000;
7235
c7b8f16e 7236#define VFP11_ERRATUM_VENEER_SIZE 8
a504d23a
LA		 7237#define STM32L4XX_ERRATUM_LDM_VENEER_SIZE 16
7238#define STM32L4XX_ERRATUM_VLDM_VENEER_SIZE 24
c7b8f16e 7239
845b51d6
PB		 7240#define ARM_BX_VENEER_SIZE 12
7241static const insn32 armbx1_tst_insn = 0xe3100001;
7242static const insn32 armbx2_moveq_insn = 0x01a0f000;
7243static const insn32 armbx3_bx_insn = 0xe12fff10;
7244
7e392df6 7245#ifndef ELFARM_NABI_C_INCLUDED
8029a119
NC		 7246static void
7247arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
252b5132
RH		 7248{
7249 asection * s;
8029a119 7250 bfd_byte * contents;
252b5132 7251
8029a119 7252 if (size == 0)
3e6b1042
DJ		 7253 {
7254 /* Do not include empty glue sections in the output. */
7255 if (abfd != NULL)
7256 {
3d4d4302 7257 s = bfd_get_linker_section (abfd, name);
3e6b1042
DJ		 7258 if (s != NULL)
7259 s->flags |= SEC_EXCLUDE;
7260 }
7261 return;
7262 }
252b5132 7263
8029a119 7264 BFD_ASSERT (abfd != NULL);
252b5132 7265
3d4d4302 7266 s = bfd_get_linker_section (abfd, name);
8029a119 7267 BFD_ASSERT (s != NULL);
252b5132 7268
b0f4fbf8 7269 contents = (bfd_byte *) bfd_zalloc (abfd, size);
252b5132 7270
8029a119
NC		 7271 BFD_ASSERT (s->size == size);
7272 s->contents = contents;
7273}
906e58ca 7274
8029a119
NC		 7275bfd_boolean
7276bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
7277{
7278 struct elf32_arm_link_hash_table * globals;
906e58ca 7279
8029a119
NC		 7280 globals = elf32_arm_hash_table (info);
7281 BFD_ASSERT (globals != NULL);
906e58ca 7282
8029a119
NC		 7283 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
7284 globals->arm_glue_size,
7285 ARM2THUMB_GLUE_SECTION_NAME);
906e58ca 7286
8029a119
NC		 7287 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
7288 globals->thumb_glue_size,
7289 THUMB2ARM_GLUE_SECTION_NAME);
252b5132 7290
8029a119
NC		 7291 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
7292 globals->vfp11_erratum_glue_size,
7293 VFP11_ERRATUM_VENEER_SECTION_NAME);
845b51d6 7294
a504d23a
LA		 7295 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
7296 globals->stm32l4xx_erratum_glue_size,
7297 STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
7298
8029a119
NC		 7299 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
7300 globals->bx_glue_size,
845b51d6
PB		 7301 ARM_BX_GLUE_SECTION_NAME);
7302
b34976b6 7303 return TRUE;
252b5132
RH		 7304}
7305
a4fd1a8e 7306/* Allocate space and symbols for calling a Thumb function from Arm mode.
906e58ca
NC		 7307 returns the symbol identifying the stub. */
7308
a4fd1a8e 7309static struct elf_link_hash_entry *
57e8b36a
NC		 7310record_arm_to_thumb_glue (struct bfd_link_info * link_info,
7311 struct elf_link_hash_entry * h)
252b5132
RH		 7312{
7313 const char * name = h->root.root.string;
63b0f745 7314 asection * s;
252b5132
RH		 7315 char * tmp_name;
7316 struct elf_link_hash_entry * myh;
14a793b2 7317 struct bfd_link_hash_entry * bh;
252b5132 7318 struct elf32_arm_link_hash_table * globals;
dc810e39 7319 bfd_vma val;
2f475487 7320 bfd_size_type size;
252b5132
RH		 7321
7322 globals = elf32_arm_hash_table (link_info);
252b5132
RH		 7323 BFD_ASSERT (globals != NULL);
7324 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
7325
3d4d4302 7326 s = bfd_get_linker_section
252b5132
RH		 7327 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
7328
252b5132
RH		 7329 BFD_ASSERT (s != NULL);
7330
21d799b5 7331 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
99059e56 7332 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 7333 BFD_ASSERT (tmp_name);
7334
7335 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
7336
7337 myh = elf_link_hash_lookup
b34976b6 7338 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH		 7339
7340 if (myh != NULL)
7341 {
9b485d32 7342 /* We've already seen this guy. */
252b5132 7343 free (tmp_name);
a4fd1a8e 7344 return myh;
252b5132
RH		 7345 }
7346
57e8b36a
NC		 7347 /* The only trick here is using hash_table->arm_glue_size as the value.
7348 Even though the section isn't allocated yet, this is where we will be
3dccd7b7
DJ		 7349 putting it. The +1 on the value marks that the stub has not been
7350 output yet - not that it is a Thumb function. */
14a793b2 7351 bh = NULL;
dc810e39
AM		 7352 val = globals->arm_glue_size + 1;
7353 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
7354 tmp_name, BSF_GLOBAL, s, val,
b34976b6 7355 NULL, TRUE, FALSE, &bh);
252b5132 7356
b7693d02
DJ		 7357 myh = (struct elf_link_hash_entry *) bh;
7358 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7359 myh->forced_local = 1;
7360
252b5132
RH		 7361 free (tmp_name);
7362
0e1862bb
L		 7363 if (bfd_link_pic (link_info)
7364 || globals->root.is_relocatable_executable
27e55c4d 7365 || globals->pic_veneer)
2f475487 7366 size = ARM2THUMB_PIC_GLUE_SIZE;
26079076
PB		 7367 else if (globals->use_blx)
7368 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
8f6277f5 7369 else
2f475487
AM		 7370 size = ARM2THUMB_STATIC_GLUE_SIZE;
7371
7372 s->size += size;
7373 globals->arm_glue_size += size;
252b5132 7374
a4fd1a8e 7375 return myh;
252b5132
RH		 7376}
7377
845b51d6
PB		 7378/* Allocate space for ARMv4 BX veneers. */
7379
7380static void
7381record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
7382{
7383 asection * s;
7384 struct elf32_arm_link_hash_table *globals;
7385 char *tmp_name;
7386 struct elf_link_hash_entry *myh;
7387 struct bfd_link_hash_entry *bh;
7388 bfd_vma val;
7389
7390 /* BX PC does not need a veneer. */
7391 if (reg == 15)
7392 return;
7393
7394 globals = elf32_arm_hash_table (link_info);
845b51d6
PB		 7395 BFD_ASSERT (globals != NULL);
7396 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
7397
7398 /* Check if this veneer has already been allocated. */
7399 if (globals->bx_glue_offset[reg])
7400 return;
7401
3d4d4302 7402 s = bfd_get_linker_section
845b51d6
PB		 7403 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
7404
7405 BFD_ASSERT (s != NULL);
7406
7407 /* Add symbol for veneer. */
21d799b5
NC		 7408 tmp_name = (char *)
7409 bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
845b51d6 7410 BFD_ASSERT (tmp_name);
906e58ca 7411
845b51d6 7412 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
906e58ca 7413
845b51d6
PB		 7414 myh = elf_link_hash_lookup
7415 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
906e58ca 7416
845b51d6 7417 BFD_ASSERT (myh == NULL);
906e58ca 7418
845b51d6
PB		 7419 bh = NULL;
7420 val = globals->bx_glue_size;
7421 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
99059e56
RM		 7422 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
7423 NULL, TRUE, FALSE, &bh);
845b51d6
PB		 7424
7425 myh = (struct elf_link_hash_entry *) bh;
7426 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7427 myh->forced_local = 1;
7428
7429 s->size += ARM_BX_VENEER_SIZE;
7430 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
7431 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
7432}
7433
7434
c7b8f16e
JB		 7435/* Add an entry to the code/data map for section SEC. */
7436
7437static void
7438elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
7439{
7440 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
7441 unsigned int newidx;
906e58ca 7442
c7b8f16e
JB		 7443 if (sec_data->map == NULL)
7444 {
21d799b5 7445 sec_data->map = (elf32_arm_section_map *)
99059e56 7446 bfd_malloc (sizeof (elf32_arm_section_map));
c7b8f16e
JB		 7447 sec_data->mapcount = 0;
7448 sec_data->mapsize = 1;
7449 }
906e58ca 7450
c7b8f16e 7451 newidx = sec_data->mapcount++;
906e58ca 7452
c7b8f16e
JB		 7453 if (sec_data->mapcount > sec_data->mapsize)
7454 {
7455 sec_data->mapsize *= 2;
21d799b5 7456 sec_data->map = (elf32_arm_section_map *)
99059e56
RM		 7457 bfd_realloc_or_free (sec_data->map, sec_data->mapsize
7458 * sizeof (elf32_arm_section_map));
515ef31d
NC		 7459 }
7460
7461 if (sec_data->map)
7462 {
7463 sec_data->map[newidx].vma = vma;
7464 sec_data->map[newidx].type = type;
c7b8f16e 7465 }
c7b8f16e
JB		 7466}
7467
7468
7469/* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
7470 veneers are handled for now. */
7471
7472static bfd_vma
7473record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
99059e56
RM		 7474 elf32_vfp11_erratum_list *branch,
7475 bfd *branch_bfd,
7476 asection *branch_sec,
7477 unsigned int offset)
c7b8f16e
JB		 7478{
7479 asection *s;
7480 struct elf32_arm_link_hash_table *hash_table;
7481 char *tmp_name;
7482 struct elf_link_hash_entry *myh;
7483 struct bfd_link_hash_entry *bh;
7484 bfd_vma val;
7485 struct _arm_elf_section_data *sec_data;
c7b8f16e 7486 elf32_vfp11_erratum_list *newerr;
906e58ca 7487
c7b8f16e 7488 hash_table = elf32_arm_hash_table (link_info);
c7b8f16e
JB		 7489 BFD_ASSERT (hash_table != NULL);
7490 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
906e58ca 7491
3d4d4302 7492 s = bfd_get_linker_section
c7b8f16e 7493 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
906e58ca 7494
c7b8f16e 7495 sec_data = elf32_arm_section_data (s);
906e58ca 7496
c7b8f16e 7497 BFD_ASSERT (s != NULL);
906e58ca 7498
21d799b5 7499 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
99059e56 7500 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
c7b8f16e 7501 BFD_ASSERT (tmp_name);
906e58ca 7502
c7b8f16e
JB		 7503 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
7504 hash_table->num_vfp11_fixes);
906e58ca 7505
c7b8f16e
JB		 7506 myh = elf_link_hash_lookup
7507 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
906e58ca 7508
c7b8f16e 7509 BFD_ASSERT (myh == NULL);
906e58ca 7510
c7b8f16e
JB		 7511 bh = NULL;
7512 val = hash_table->vfp11_erratum_glue_size;
7513 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
99059e56
RM		 7514 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
7515 NULL, TRUE, FALSE, &bh);
c7b8f16e
JB		 7516
7517 myh = (struct elf_link_hash_entry *) bh;
7518 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7519 myh->forced_local = 1;
7520
7521 /* Link veneer back to calling location. */
c7e2358a 7522 sec_data->erratumcount += 1;
21d799b5
NC		 7523 newerr = (elf32_vfp11_erratum_list *)
7524 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
906e58ca 7525
c7b8f16e
JB		 7526 newerr->type = VFP11_ERRATUM_ARM_VENEER;
7527 newerr->vma = -1;
7528 newerr->u.v.branch = branch;
7529 newerr->u.v.id = hash_table->num_vfp11_fixes;
7530 branch->u.b.veneer = newerr;
7531
7532 newerr->next = sec_data->erratumlist;
7533 sec_data->erratumlist = newerr;
7534
7535 /* A symbol for the return from the veneer. */
7536 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
7537 hash_table->num_vfp11_fixes);
7538
7539 myh = elf_link_hash_lookup
7540 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
906e58ca 7541
c7b8f16e
JB		 7542 if (myh != NULL)
7543 abort ();
7544
7545 bh = NULL;
7546 val = offset + 4;
7547 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
7548 branch_sec, val, NULL, TRUE, FALSE, &bh);
906e58ca 7549
c7b8f16e
JB		 7550 myh = (struct elf_link_hash_entry *) bh;
7551 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7552 myh->forced_local = 1;
7553
7554 free (tmp_name);
906e58ca 7555
c7b8f16e
JB		 7556 /* Generate a mapping symbol for the veneer section, and explicitly add an
7557 entry for that symbol to the code/data map for the section. */
7558 if (hash_table->vfp11_erratum_glue_size == 0)
7559 {
7560 bh = NULL;
7561 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
99059e56 7562 ever requires this erratum fix. */
c7b8f16e
JB		 7563 _bfd_generic_link_add_one_symbol (link_info,
7564 hash_table->bfd_of_glue_owner, "$a",
7565 BSF_LOCAL, s, 0, NULL,
99059e56 7566 TRUE, FALSE, &bh);
c7b8f16e
JB		 7567
7568 myh = (struct elf_link_hash_entry *) bh;
7569 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7570 myh->forced_local = 1;
906e58ca 7571
c7b8f16e 7572 /* The elf32_arm_init_maps function only cares about symbols from input
99059e56
RM		 7573 BFDs. We must make a note of this generated mapping symbol
7574 ourselves so that code byteswapping works properly in
7575 elf32_arm_write_section. */
c7b8f16e
JB		 7576 elf32_arm_section_map_add (s, 'a', 0);
7577 }
906e58ca 7578
c7b8f16e
JB		 7579 s->size += VFP11_ERRATUM_VENEER_SIZE;
7580 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
7581 hash_table->num_vfp11_fixes++;
906e58ca 7582
c7b8f16e
JB		 7583 /* The offset of the veneer. */
7584 return val;
7585}
7586
a504d23a
LA		 7587/* Record information about a STM32L4XX STM erratum veneer. Only THUMB-mode
7588 veneers need to be handled because used only in Cortex-M. */
7589
7590static bfd_vma
7591record_stm32l4xx_erratum_veneer (struct bfd_link_info *link_info,
7592 elf32_stm32l4xx_erratum_list *branch,
7593 bfd *branch_bfd,
7594 asection *branch_sec,
7595 unsigned int offset,
7596 bfd_size_type veneer_size)
7597{
7598 asection *s;
7599 struct elf32_arm_link_hash_table *hash_table;
7600 char *tmp_name;
7601 struct elf_link_hash_entry *myh;
7602 struct bfd_link_hash_entry *bh;
7603 bfd_vma val;
7604 struct _arm_elf_section_data *sec_data;
7605 elf32_stm32l4xx_erratum_list *newerr;
7606
7607 hash_table = elf32_arm_hash_table (link_info);
7608 BFD_ASSERT (hash_table != NULL);
7609 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
7610
7611 s = bfd_get_linker_section
7612 (hash_table->bfd_of_glue_owner, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
7613
7614 BFD_ASSERT (s != NULL);
7615
7616 sec_data = elf32_arm_section_data (s);
7617
7618 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
7619 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
a504d23a
LA		 7620 BFD_ASSERT (tmp_name);
7621
7622 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
7623 hash_table->num_stm32l4xx_fixes);
7624
7625 myh = elf_link_hash_lookup
7626 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
7627
7628 BFD_ASSERT (myh == NULL);
7629
7630 bh = NULL;
7631 val = hash_table->stm32l4xx_erratum_glue_size;
7632 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
7633 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
7634 NULL, TRUE, FALSE, &bh);
7635
7636 myh = (struct elf_link_hash_entry *) bh;
7637 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7638 myh->forced_local = 1;
7639
7640 /* Link veneer back to calling location. */
7641 sec_data->stm32l4xx_erratumcount += 1;
7642 newerr = (elf32_stm32l4xx_erratum_list *)
7643 bfd_zmalloc (sizeof (elf32_stm32l4xx_erratum_list));
7644
7645 newerr->type = STM32L4XX_ERRATUM_VENEER;
7646 newerr->vma = -1;
7647 newerr->u.v.branch = branch;
7648 newerr->u.v.id = hash_table->num_stm32l4xx_fixes;
7649 branch->u.b.veneer = newerr;
7650
7651 newerr->next = sec_data->stm32l4xx_erratumlist;
7652 sec_data->stm32l4xx_erratumlist = newerr;
7653
7654 /* A symbol for the return from the veneer. */
7655 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
7656 hash_table->num_stm32l4xx_fixes);
7657
7658 myh = elf_link_hash_lookup
7659 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
7660
7661 if (myh != NULL)
7662 abort ();
7663
7664 bh = NULL;
7665 val = offset + 4;
7666 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
7667 branch_sec, val, NULL, TRUE, FALSE, &bh);
7668
7669 myh = (struct elf_link_hash_entry *) bh;
7670 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7671 myh->forced_local = 1;
7672
7673 free (tmp_name);
7674
7675 /* Generate a mapping symbol for the veneer section, and explicitly add an
7676 entry for that symbol to the code/data map for the section. */
7677 if (hash_table->stm32l4xx_erratum_glue_size == 0)
7678 {
7679 bh = NULL;
7680 /* Creates a THUMB symbol since there is no other choice. */
7681 _bfd_generic_link_add_one_symbol (link_info,
7682 hash_table->bfd_of_glue_owner, "$t",
7683 BSF_LOCAL, s, 0, NULL,
7684 TRUE, FALSE, &bh);
7685
7686 myh = (struct elf_link_hash_entry *) bh;
7687 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7688 myh->forced_local = 1;
7689
7690 /* The elf32_arm_init_maps function only cares about symbols from input
7691 BFDs. We must make a note of this generated mapping symbol
7692 ourselves so that code byteswapping works properly in
7693 elf32_arm_write_section. */
7694 elf32_arm_section_map_add (s, 't', 0);
7695 }
7696
7697 s->size += veneer_size;
7698 hash_table->stm32l4xx_erratum_glue_size += veneer_size;
7699 hash_table->num_stm32l4xx_fixes++;
7700
7701 /* The offset of the veneer. */
7702 return val;
7703}
7704
8029a119 7705#define ARM_GLUE_SECTION_FLAGS \
3e6b1042
DJ		 7706 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
7707 | SEC_READONLY | SEC_LINKER_CREATED)
8029a119
NC		 7708
7709/* Create a fake section for use by the ARM backend of the linker. */
7710
7711static bfd_boolean
7712arm_make_glue_section (bfd * abfd, const char * name)
7713{
7714 asection * sec;
7715
3d4d4302 7716 sec = bfd_get_linker_section (abfd, name);
8029a119
NC		 7717 if (sec != NULL)
7718 /* Already made. */
7719 return TRUE;
7720
3d4d4302 7721 sec = bfd_make_section_anyway_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
8029a119
NC		 7722
7723 if (sec == NULL
fd361982 7724 || !bfd_set_section_alignment (sec, 2))
8029a119
NC		 7725 return FALSE;
7726
7727 /* Set the gc mark to prevent the section from being removed by garbage
7728 collection, despite the fact that no relocs refer to this section. */
7729 sec->gc_mark = 1;
7730
7731 return TRUE;
7732}
7733
1db37fe6
YG		 7734/* Set size of .plt entries. This function is called from the
7735 linker scripts in ld/emultempl/{armelf}.em. */
7736
7737void
7738bfd_elf32_arm_use_long_plt (void)
7739{
7740 elf32_arm_use_long_plt_entry = TRUE;
7741}
7742
8afb0e02
NC		 7743/* Add the glue sections to ABFD. This function is called from the
7744 linker scripts in ld/emultempl/{armelf}.em. */
9b485d32 7745
b34976b6 7746bfd_boolean
57e8b36a
NC		 7747bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
7748 struct bfd_link_info *info)
252b5132 7749{
a504d23a
LA		 7750 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
7751 bfd_boolean dostm32l4xx = globals
7752 && globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE;
7753 bfd_boolean addglue;
7754
8afb0e02
NC		 7755 /* If we are only performing a partial
7756 link do not bother adding the glue. */
0e1862bb 7757 if (bfd_link_relocatable (info))
b34976b6 7758 return TRUE;
252b5132 7759
a504d23a 7760 addglue = arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
8029a119
NC		 7761 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
7762 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
7763 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
a504d23a
LA		 7764
7765 if (!dostm32l4xx)
7766 return addglue;
7767
7768 return addglue
7769 && arm_make_glue_section (abfd, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
8afb0e02
NC		 7770}
7771
daa4adae
TP		 7772/* Mark output sections of veneers needing a dedicated one with SEC_KEEP. This
7773 ensures they are not marked for deletion by
7774 strip_excluded_output_sections () when veneers are going to be created
7775 later. Not doing so would trigger assert on empty section size in
7776 lang_size_sections_1 (). */
7777
7778void
7779bfd_elf32_arm_keep_private_stub_output_sections (struct bfd_link_info *info)
7780{
7781 enum elf32_arm_stub_type stub_type;
7782
7783 /* If we are only performing a partial
7784 link do not bother adding the glue. */
7785 if (bfd_link_relocatable (info))
7786 return;
7787
7788 for (stub_type = arm_stub_none + 1; stub_type < max_stub_type; stub_type++)
7789 {
7790 asection *out_sec;
7791 const char *out_sec_name;
7792
7793 if (!arm_dedicated_stub_output_section_required (stub_type))
7794 continue;
7795
7796 out_sec_name = arm_dedicated_stub_output_section_name (stub_type);
7797 out_sec = bfd_get_section_by_name (info->output_bfd, out_sec_name);
7798 if (out_sec != NULL)
7799 out_sec->flags |= SEC_KEEP;
7800 }
7801}
7802
8afb0e02
NC		 7803/* Select a BFD to be used to hold the sections used by the glue code.
7804 This function is called from the linker scripts in ld/emultempl/
8029a119 7805 {armelf/pe}.em. */
8afb0e02 7806
b34976b6 7807bfd_boolean
57e8b36a 7808bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
8afb0e02
NC		 7809{
7810 struct elf32_arm_link_hash_table *globals;
7811
7812 /* If we are only performing a partial link
7813 do not bother getting a bfd to hold the glue. */
0e1862bb 7814 if (bfd_link_relocatable (info))
b34976b6 7815 return TRUE;
8afb0e02 7816
b7693d02
DJ		 7817 /* Make sure we don't attach the glue sections to a dynamic object. */
7818 BFD_ASSERT (!(abfd->flags & DYNAMIC));
7819
8afb0e02 7820 globals = elf32_arm_hash_table (info);
8afb0e02
NC		 7821 BFD_ASSERT (globals != NULL);
7822
7823 if (globals->bfd_of_glue_owner != NULL)
b34976b6 7824 return TRUE;
8afb0e02 7825
252b5132
RH		 7826 /* Save the bfd for later use. */
7827 globals->bfd_of_glue_owner = abfd;
cedb70c5 7828
b34976b6 7829 return TRUE;
252b5132
RH		 7830}
7831
906e58ca
NC		 7832static void
7833check_use_blx (struct elf32_arm_link_hash_table *globals)
39b41c9c 7834{
2de70689
MGD		 7835 int cpu_arch;
7836
b38cadfb 7837 cpu_arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2de70689
MGD		 7838 Tag_CPU_arch);
7839
7840 if (globals->fix_arm1176)
7841 {
7842 if (cpu_arch == TAG_CPU_ARCH_V6T2 || cpu_arch > TAG_CPU_ARCH_V6K)
7843 globals->use_blx = 1;
7844 }
7845 else
7846 {
7847 if (cpu_arch > TAG_CPU_ARCH_V4T)
7848 globals->use_blx = 1;
7849 }
39b41c9c
PB		 7850}
7851
b34976b6 7852bfd_boolean
57e8b36a 7853bfd_elf32_arm_process_before_allocation (bfd *abfd,
d504ffc8 7854 struct bfd_link_info *link_info)
252b5132
RH		 7855{
7856 Elf_Internal_Shdr *symtab_hdr;
6cdc0ccc 7857 Elf_Internal_Rela *internal_relocs = NULL;
252b5132
RH		 7858 Elf_Internal_Rela *irel, *irelend;
7859 bfd_byte *contents = NULL;
252b5132
RH		 7860
7861 asection *sec;
7862 struct elf32_arm_link_hash_table *globals;
7863
7864 /* If we are only performing a partial link do not bother
7865 to construct any glue. */
0e1862bb 7866 if (bfd_link_relocatable (link_info))
b34976b6 7867 return TRUE;
252b5132 7868
39ce1a6a
NC		 7869 /* Here we have a bfd that is to be included on the link. We have a
7870 hook to do reloc rummaging, before section sizes are nailed down. */
252b5132 7871 globals = elf32_arm_hash_table (link_info);
252b5132 7872 BFD_ASSERT (globals != NULL);
39ce1a6a
NC		 7873
7874 check_use_blx (globals);
252b5132 7875
d504ffc8 7876 if (globals->byteswap_code && !bfd_big_endian (abfd))
e489d0ae 7877 {
90b6238f 7878 _bfd_error_handler (_("%pB: BE8 images only valid in big-endian mode"),
d003868e 7879 abfd);
e489d0ae
PB		 7880 return FALSE;
7881 }
f21f3fe0 7882
39ce1a6a
NC		 7883 /* PR 5398: If we have not decided to include any loadable sections in
7884 the output then we will not have a glue owner bfd. This is OK, it
7885 just means that there is nothing else for us to do here. */
7886 if (globals->bfd_of_glue_owner == NULL)
7887 return TRUE;
7888
252b5132
RH		 7889 /* Rummage around all the relocs and map the glue vectors. */
7890 sec = abfd->sections;
7891
7892 if (sec == NULL)
b34976b6 7893 return TRUE;
252b5132
RH		 7894
7895 for (; sec != NULL; sec = sec->next)
7896 {
7897 if (sec->reloc_count == 0)
7898 continue;
7899
2f475487
AM		 7900 if ((sec->flags & SEC_EXCLUDE) != 0)
7901 continue;
7902
0ffa91dd 7903 symtab_hdr = & elf_symtab_hdr (abfd);
252b5132 7904
9b485d32 7905 /* Load the relocs. */
6cdc0ccc 7906 internal_relocs
906e58ca 7907 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
252b5132 7908
6cdc0ccc
AM		 7909 if (internal_relocs == NULL)
7910 goto error_return;
252b5132 7911
6cdc0ccc
AM		 7912 irelend = internal_relocs + sec->reloc_count;
7913 for (irel = internal_relocs; irel < irelend; irel++)
252b5132
RH		 7914 {
7915 long r_type;
7916 unsigned long r_index;
252b5132
RH		 7917
7918 struct elf_link_hash_entry *h;
7919
7920 r_type = ELF32_R_TYPE (irel->r_info);
7921 r_index = ELF32_R_SYM (irel->r_info);
7922
9b485d32 7923 /* These are the only relocation types we care about. */
ba96a88f 7924 if ( r_type != R_ARM_PC24
845b51d6 7925 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
252b5132
RH		 7926 continue;
7927
7928 /* Get the section contents if we haven't done so already. */
7929 if (contents == NULL)
7930 {
7931 /* Get cached copy if it exists. */
7932 if (elf_section_data (sec)->this_hdr.contents != NULL)
7933 contents = elf_section_data (sec)->this_hdr.contents;
7934 else
7935 {
7936 /* Go get them off disk. */
57e8b36a 7937 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
252b5132
RH		 7938 goto error_return;
7939 }
7940 }
7941
845b51d6
PB		 7942 if (r_type == R_ARM_V4BX)
7943 {
7944 int reg;
7945
7946 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
7947 record_arm_bx_glue (link_info, reg);
7948 continue;
7949 }
7950
a7c10850 7951 /* If the relocation is not against a symbol it cannot concern us. */
252b5132
RH		 7952 h = NULL;
7953
9b485d32 7954 /* We don't care about local symbols. */
252b5132
RH		 7955 if (r_index < symtab_hdr->sh_info)
7956 continue;
7957
9b485d32 7958 /* This is an external symbol. */
252b5132
RH		 7959 r_index -= symtab_hdr->sh_info;
7960 h = (struct elf_link_hash_entry *)
7961 elf_sym_hashes (abfd)[r_index];
7962
7963 /* If the relocation is against a static symbol it must be within
7964 the current section and so cannot be a cross ARM/Thumb relocation. */
7965 if (h == NULL)
7966 continue;
7967
d504ffc8
DJ		 7968 /* If the call will go through a PLT entry then we do not need
7969 glue. */
362d30a1 7970 if (globals->root.splt != NULL && h->plt.offset != (bfd_vma) -1)
b7693d02
DJ		 7971 continue;
7972
252b5132
RH		 7973 switch (r_type)
7974 {
7975 case R_ARM_PC24:
7976 /* This one is a call from arm code. We need to look up
99059e56
RM		 7977 the target of the call. If it is a thumb target, we
7978 insert glue. */
39d911fc
TP		 7979 if (ARM_GET_SYM_BRANCH_TYPE (h->target_internal)
7980 == ST_BRANCH_TO_THUMB)
252b5132
RH		 7981 record_arm_to_thumb_glue (link_info, h);
7982 break;
7983
252b5132 7984 default:
c6596c5e 7985 abort ();
252b5132
RH		 7986 }
7987 }
6cdc0ccc
AM		 7988
7989 if (contents != NULL
7990 && elf_section_data (sec)->this_hdr.contents != contents)
7991 free (contents);
7992 contents = NULL;
7993
7994 if (internal_relocs != NULL
7995 && elf_section_data (sec)->relocs != internal_relocs)
7996 free (internal_relocs);
7997 internal_relocs = NULL;
252b5132
RH		 7998 }
7999
b34976b6 8000 return TRUE;
9a5aca8c 8001
dc1e8a47 8002 error_return:
6cdc0ccc
AM		 8003 if (contents != NULL
8004 && elf_section_data (sec)->this_hdr.contents != contents)
8005 free (contents);
8006 if (internal_relocs != NULL
8007 && elf_section_data (sec)->relocs != internal_relocs)
8008 free (internal_relocs);
9a5aca8c 8009
b34976b6 8010 return FALSE;
252b5132 8011}
7e392df6 8012#endif
252b5132 8013
eb043451 8014
c7b8f16e
JB		 8015/* Initialise maps of ARM/Thumb/data for input BFDs. */
8016
8017void
8018bfd_elf32_arm_init_maps (bfd *abfd)
8019{
8020 Elf_Internal_Sym *isymbuf;
8021 Elf_Internal_Shdr *hdr;
8022 unsigned int i, localsyms;
8023
af1f4419
NC		 8024 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
8025 if (! is_arm_elf (abfd))
8026 return;
8027
c7b8f16e
JB		 8028 if ((abfd->flags & DYNAMIC) != 0)
8029 return;
8030
0ffa91dd 8031 hdr = & elf_symtab_hdr (abfd);
c7b8f16e
JB		 8032 localsyms = hdr->sh_info;
8033
8034 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
8035 should contain the number of local symbols, which should come before any
8036 global symbols. Mapping symbols are always local. */
8037 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
8038 NULL);
8039
8040 /* No internal symbols read? Skip this BFD. */
8041 if (isymbuf == NULL)
8042 return;
8043
8044 for (i = 0; i < localsyms; i++)
8045 {
8046 Elf_Internal_Sym *isym = &isymbuf[i];
8047 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
8048 const char *name;
906e58ca 8049
c7b8f16e 8050 if (sec != NULL
99059e56
RM		 8051 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
8052 {
8053 name = bfd_elf_string_from_elf_section (abfd,
8054 hdr->sh_link, isym->st_name);
906e58ca 8055
99059e56 8056 if (bfd_is_arm_special_symbol_name (name,
c7b8f16e 8057 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
99059e56
RM		 8058 elf32_arm_section_map_add (sec, name[1], isym->st_value);
8059 }
c7b8f16e
JB		 8060 }
8061}
8062
8063
48229727
JB		 8064/* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
8065 say what they wanted. */
8066
8067void
8068bfd_elf32_arm_set_cortex_a8_fix (bfd *obfd, struct bfd_link_info *link_info)
8069{
8070 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
8071 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
8072
4dfe6ac6
NC		 8073 if (globals == NULL)
8074 return;
8075
48229727
JB		 8076 if (globals->fix_cortex_a8 == -1)
8077 {
8078 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
8079 if (out_attr[Tag_CPU_arch].i == TAG_CPU_ARCH_V7
8080 && (out_attr[Tag_CPU_arch_profile].i == 'A'
8081 || out_attr[Tag_CPU_arch_profile].i == 0))
8082 globals->fix_cortex_a8 = 1;
8083 else
8084 globals->fix_cortex_a8 = 0;
8085 }
8086}
8087
8088
c7b8f16e
JB		 8089void
8090bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
8091{
8092 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
104d59d1 8093 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
906e58ca 8094
4dfe6ac6
NC		 8095 if (globals == NULL)
8096 return;
c7b8f16e
JB		 8097 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
8098 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
8099 {
8100 switch (globals->vfp11_fix)
99059e56
RM		 8101 {
8102 case BFD_ARM_VFP11_FIX_DEFAULT:
8103 case BFD_ARM_VFP11_FIX_NONE:
8104 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
8105 break;
8106
8107 default:
8108 /* Give a warning, but do as the user requests anyway. */
871b3ab2 8109 _bfd_error_handler (_("%pB: warning: selected VFP11 erratum "
99059e56
RM		 8110 "workaround is not necessary for target architecture"), obfd);
8111 }
c7b8f16e
JB		 8112 }
8113 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
8114 /* For earlier architectures, we might need the workaround, but do not
8115 enable it by default. If users is running with broken hardware, they
8116 must enable the erratum fix explicitly. */
8117 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
8118}
8119
a504d23a
LA		 8120void
8121bfd_elf32_arm_set_stm32l4xx_fix (bfd *obfd, struct bfd_link_info *link_info)
8122{
8123 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
8124 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
8125
8126 if (globals == NULL)
8127 return;
8128
8129 /* We assume only Cortex-M4 may require the fix. */
8130 if (out_attr[Tag_CPU_arch].i != TAG_CPU_ARCH_V7E_M
8131 || out_attr[Tag_CPU_arch_profile].i != 'M')
8132 {
8133 if (globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE)
8134 /* Give a warning, but do as the user requests anyway. */
4eca0228 8135 _bfd_error_handler
871b3ab2 8136 (_("%pB: warning: selected STM32L4XX erratum "
a504d23a
LA		 8137 "workaround is not necessary for target architecture"), obfd);
8138 }
8139}
c7b8f16e 8140
906e58ca
NC		 8141enum bfd_arm_vfp11_pipe
8142{
c7b8f16e
JB		 8143 VFP11_FMAC,
8144 VFP11_LS,
8145 VFP11_DS,
8146 VFP11_BAD
8147};
8148
8149/* Return a VFP register number. This is encoded as RX:X for single-precision
8150 registers, or X:RX for double-precision registers, where RX is the group of
8151 four bits in the instruction encoding and X is the single extension bit.
8152 RX and X fields are specified using their lowest (starting) bit. The return
8153 value is:
8154
8155 0...31: single-precision registers s0...s31
8156 32...63: double-precision registers d0...d31.
906e58ca 8157
c7b8f16e
JB		 8158 Although X should be zero for VFP11 (encoding d0...d15 only), we might
8159 encounter VFP3 instructions, so we allow the full range for DP registers. */
906e58ca 8160
c7b8f16e
JB		 8161static unsigned int
8162bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
99059e56 8163 unsigned int x)
c7b8f16e
JB		 8164{
8165 if (is_double)
8166 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
8167 else
8168 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
8169}
8170
8171/* Set bits in *WMASK according to a register number REG as encoded by
8172 bfd_arm_vfp11_regno(). Ignore d16-d31. */
8173
8174static void
8175bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
8176{
8177 if (reg < 32)
8178 *wmask |= 1 << reg;
8179 else if (reg < 48)
8180 *wmask |= 3 << ((reg - 32) * 2);
8181}
8182
8183/* Return TRUE if WMASK overwrites anything in REGS. */
8184
8185static bfd_boolean
8186bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
8187{
8188 int i;
906e58ca 8189
c7b8f16e
JB		 8190 for (i = 0; i < numregs; i++)
8191 {
8192 unsigned int reg = regs[i];
8193
8194 if (reg < 32 && (wmask & (1 << reg)) != 0)
99059e56 8195 return TRUE;
906e58ca 8196
c7b8f16e
JB		 8197 reg -= 32;
8198
8199 if (reg >= 16)
99059e56 8200 continue;
906e58ca 8201
c7b8f16e 8202 if ((wmask & (3 << (reg * 2))) != 0)
99059e56 8203 return TRUE;
c7b8f16e 8204 }
906e58ca 8205
c7b8f16e
JB		 8206 return FALSE;
8207}
8208
8209/* In this function, we're interested in two things: finding input registers
8210 for VFP data-processing instructions, and finding the set of registers which
8211 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
8212 hold the written set, so FLDM etc. are easy to deal with (we're only
8213 interested in 32 SP registers or 16 dp registers, due to the VFP version
8214 implemented by the chip in question). DP registers are marked by setting
8215 both SP registers in the write mask). */
8216
8217static enum bfd_arm_vfp11_pipe
8218bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
99059e56 8219 int *numregs)
c7b8f16e 8220{
91d6fa6a 8221 enum bfd_arm_vfp11_pipe vpipe = VFP11_BAD;
c7b8f16e
JB		 8222 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
8223
8224 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
8225 {
8226 unsigned int pqrs;
8227 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
8228 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
8229
8230 pqrs = ((insn & 0x00800000) >> 20)
99059e56
RM		 8231 | ((insn & 0x00300000) >> 19)
8232 | ((insn & 0x00000040) >> 6);
c7b8f16e
JB		 8233
8234 switch (pqrs)
99059e56
RM		 8235 {
8236 case 0: /* fmac[sd]. */
8237 case 1: /* fnmac[sd]. */
8238 case 2: /* fmsc[sd]. */
8239 case 3: /* fnmsc[sd]. */
8240 vpipe = VFP11_FMAC;
8241 bfd_arm_vfp11_write_mask (destmask, fd);
8242 regs[0] = fd;
8243 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
8244 regs[2] = fm;
8245 *numregs = 3;
8246 break;
8247
8248 case 4: /* fmul[sd]. */
8249 case 5: /* fnmul[sd]. */
8250 case 6: /* fadd[sd]. */
8251 case 7: /* fsub[sd]. */
8252 vpipe = VFP11_FMAC;
8253 goto vfp_binop;
8254
8255 case 8: /* fdiv[sd]. */
8256 vpipe = VFP11_DS;
8257 vfp_binop:
8258 bfd_arm_vfp11_write_mask (destmask, fd);
8259 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
8260 regs[1] = fm;
8261 *numregs = 2;
8262 break;
8263
8264 case 15: /* extended opcode. */
8265 {
8266 unsigned int extn = ((insn >> 15) & 0x1e)
8267 | ((insn >> 7) & 1);
8268
8269 switch (extn)
8270 {
8271 case 0: /* fcpy[sd]. */
8272 case 1: /* fabs[sd]. */
8273 case 2: /* fneg[sd]. */
8274 case 8: /* fcmp[sd]. */
8275 case 9: /* fcmpe[sd]. */
8276 case 10: /* fcmpz[sd]. */
8277 case 11: /* fcmpez[sd]. */
8278 case 16: /* fuito[sd]. */
8279 case 17: /* fsito[sd]. */
8280 case 24: /* ftoui[sd]. */
8281 case 25: /* ftouiz[sd]. */
8282 case 26: /* ftosi[sd]. */
8283 case 27: /* ftosiz[sd]. */
8284 /* These instructions will not bounce due to underflow. */
8285 *numregs = 0;
8286 vpipe = VFP11_FMAC;
8287 break;
8288
8289 case 3: /* fsqrt[sd]. */
8290 /* fsqrt cannot underflow, but it can (perhaps) overwrite
8291 registers to cause the erratum in previous instructions. */
8292 bfd_arm_vfp11_write_mask (destmask, fd);
8293 vpipe = VFP11_DS;
8294 break;
8295
8296 case 15: /* fcvt{ds,sd}. */
8297 {
8298 int rnum = 0;
8299
8300 bfd_arm_vfp11_write_mask (destmask, fd);
c7b8f16e
JB		 8301
8302 /* Only FCVTSD can underflow. */
99059e56
RM		 8303 if ((insn & 0x100) != 0)
8304 regs[rnum++] = fm;
c7b8f16e 8305
99059e56 8306 *numregs = rnum;
c7b8f16e 8307
99059e56
RM		 8308 vpipe = VFP11_FMAC;
8309 }
8310 break;
c7b8f16e 8311
99059e56
RM		 8312 default:
8313 return VFP11_BAD;
8314 }
8315 }
8316 break;
c7b8f16e 8317
99059e56
RM		 8318 default:
8319 return VFP11_BAD;
8320 }
c7b8f16e
JB		 8321 }
8322 /* Two-register transfer. */
8323 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
8324 {
8325 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
906e58ca 8326
c7b8f16e
JB		 8327 if ((insn & 0x100000) == 0)
8328 {
99059e56
RM		 8329 if (is_double)
8330 bfd_arm_vfp11_write_mask (destmask, fm);
8331 else
8332 {
8333 bfd_arm_vfp11_write_mask (destmask, fm);
8334 bfd_arm_vfp11_write_mask (destmask, fm + 1);
8335 }
c7b8f16e
JB		 8336 }
8337
91d6fa6a 8338 vpipe = VFP11_LS;
c7b8f16e
JB		 8339 }
8340 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
8341 {
8342 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
8343 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
906e58ca 8344
c7b8f16e 8345 switch (puw)
99059e56
RM		 8346 {
8347 case 0: /* Two-reg transfer. We should catch these above. */
8348 abort ();
906e58ca 8349
99059e56
RM		 8350 case 2: /* fldm[sdx]. */
8351 case 3:
8352 case 5:
8353 {
8354 unsigned int i, offset = insn & 0xff;
c7b8f16e 8355
99059e56
RM		 8356 if (is_double)
8357 offset >>= 1;
c7b8f16e 8358
99059e56
RM		 8359 for (i = fd; i < fd + offset; i++)
8360 bfd_arm_vfp11_write_mask (destmask, i);
8361 }
8362 break;
906e58ca 8363
99059e56
RM		 8364 case 4: /* fld[sd]. */
8365 case 6:
8366 bfd_arm_vfp11_write_mask (destmask, fd);
8367 break;
906e58ca 8368
99059e56
RM		 8369 default:
8370 return VFP11_BAD;
8371 }
c7b8f16e 8372
91d6fa6a 8373 vpipe = VFP11_LS;
c7b8f16e
JB		 8374 }
8375 /* Single-register transfer. Note L==0. */
8376 else if ((insn & 0x0f100e10) == 0x0e000a10)
8377 {
8378 unsigned int opcode = (insn >> 21) & 7;
8379 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
8380
8381 switch (opcode)
99059e56
RM		 8382 {
8383 case 0: /* fmsr/fmdlr. */
8384 case 1: /* fmdhr. */
8385 /* Mark fmdhr and fmdlr as writing to the whole of the DP
8386 destination register. I don't know if this is exactly right,
8387 but it is the conservative choice. */
8388 bfd_arm_vfp11_write_mask (destmask, fn);
8389 break;
8390
8391 case 7: /* fmxr. */
8392 break;
8393 }
c7b8f16e 8394
91d6fa6a 8395 vpipe = VFP11_LS;
c7b8f16e
JB		 8396 }
8397
91d6fa6a 8398 return vpipe;
c7b8f16e
JB		 8399}
8400
8401
8402static int elf32_arm_compare_mapping (const void * a, const void * b);
8403
8404
8405/* Look for potentially-troublesome code sequences which might trigger the
8406 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
8407 (available from ARM) for details of the erratum. A short version is
8408 described in ld.texinfo. */
8409
8410bfd_boolean
8411bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
8412{
8413 asection *sec;
8414 bfd_byte *contents = NULL;
8415 int state = 0;
8416 int regs[3], numregs = 0;
8417 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
8418 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
906e58ca 8419
4dfe6ac6
NC		 8420 if (globals == NULL)
8421 return FALSE;
8422
c7b8f16e
JB		 8423 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
8424 The states transition as follows:
906e58ca 8425
c7b8f16e 8426 0 -> 1 (vector) or 0 -> 2 (scalar)
99059e56
RM		 8427 A VFP FMAC-pipeline instruction has been seen. Fill
8428 regs[0]..regs[numregs-1] with its input operands. Remember this
8429 instruction in 'first_fmac'.
c7b8f16e
JB		 8430
8431 1 -> 2
99059e56
RM		 8432 Any instruction, except for a VFP instruction which overwrites
8433 regs[*].
906e58ca 8434
c7b8f16e
JB		 8435 1 -> 3 [ -> 0 ] or
8436 2 -> 3 [ -> 0 ]
99059e56
RM		 8437 A VFP instruction has been seen which overwrites any of regs[*].
8438 We must make a veneer! Reset state to 0 before examining next
8439 instruction.
906e58ca 8440
c7b8f16e 8441 2 -> 0
99059e56
RM		 8442 If we fail to match anything in state 2, reset to state 0 and reset
8443 the instruction pointer to the instruction after 'first_fmac'.
c7b8f16e
JB		 8444
8445 If the VFP11 vector mode is in use, there must be at least two unrelated
8446 instructions between anti-dependent VFP11 instructions to properly avoid
906e58ca 8447 triggering the erratum, hence the use of the extra state 1. */
c7b8f16e
JB		 8448
8449 /* If we are only performing a partial link do not bother
8450 to construct any glue. */
0e1862bb 8451 if (bfd_link_relocatable (link_info))
c7b8f16e
JB		 8452 return TRUE;
8453
0ffa91dd
NC		 8454 /* Skip if this bfd does not correspond to an ELF image. */
8455 if (! is_arm_elf (abfd))
8456 return TRUE;
906e58ca 8457
c7b8f16e
JB		 8458 /* We should have chosen a fix type by the time we get here. */
8459 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
8460
8461 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
8462 return TRUE;
2e6030b9 8463
33a7ffc2
JM		 8464 /* Skip this BFD if it corresponds to an executable or dynamic object. */
8465 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
8466 return TRUE;
8467
c7b8f16e
JB		 8468 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8469 {
8470 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
8471 struct _arm_elf_section_data *sec_data;
8472
8473 /* If we don't have executable progbits, we're not interested in this
99059e56 8474 section. Also skip if section is to be excluded. */
c7b8f16e 8475 if (elf_section_type (sec) != SHT_PROGBITS
99059e56
RM		 8476 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
8477 || (sec->flags & SEC_EXCLUDE) != 0
dbaa2011 8478 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
33a7ffc2 8479 || sec->output_section == bfd_abs_section_ptr
99059e56
RM		 8480 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
8481 continue;
c7b8f16e
JB		 8482
8483 sec_data = elf32_arm_section_data (sec);
906e58ca 8484
c7b8f16e 8485 if (sec_data->mapcount == 0)
99059e56 8486 continue;
906e58ca 8487
c7b8f16e
JB		 8488 if (elf_section_data (sec)->this_hdr.contents != NULL)
8489 contents = elf_section_data (sec)->this_hdr.contents;
8490 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
8491 goto error_return;
8492
8493 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
8494 elf32_arm_compare_mapping);
8495
8496 for (span = 0; span < sec_data->mapcount; span++)
99059e56
RM		 8497 {
8498 unsigned int span_start = sec_data->map[span].vma;
8499 unsigned int span_end = (span == sec_data->mapcount - 1)
c7b8f16e 8500 ? sec->size : sec_data->map[span + 1].vma;
99059e56
RM		 8501 char span_type = sec_data->map[span].type;
8502
8503 /* FIXME: Only ARM mode is supported at present. We may need to
8504 support Thumb-2 mode also at some point. */
8505 if (span_type != 'a')
8506 continue;
8507
8508 for (i = span_start; i < span_end;)
8509 {
8510 unsigned int next_i = i + 4;
8511 unsigned int insn = bfd_big_endian (abfd)
13c9c485
AM		 8512 ? (((unsigned) contents[i] << 24)
8513 | (contents[i + 1] << 16)
8514 | (contents[i + 2] << 8)
8515 | contents[i + 3])
8516 : (((unsigned) contents[i + 3] << 24)
8517 | (contents[i + 2] << 16)
8518 | (contents[i + 1] << 8)
8519 | contents[i]);
99059e56
RM		 8520 unsigned int writemask = 0;
8521 enum bfd_arm_vfp11_pipe vpipe;
8522
8523 switch (state)
8524 {
8525 case 0:
8526 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
8527 &numregs);
8528 /* I'm assuming the VFP11 erratum can trigger with denorm
8529 operands on either the FMAC or the DS pipeline. This might
8530 lead to slightly overenthusiastic veneer insertion. */
8531 if (vpipe == VFP11_FMAC || vpipe == VFP11_DS)
8532 {
8533 state = use_vector ? 1 : 2;
8534 first_fmac = i;
8535 veneer_of_insn = insn;
8536 }
8537 break;
8538
8539 case 1:
8540 {
8541 int other_regs[3], other_numregs;
8542 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
c7b8f16e 8543 other_regs,
99059e56
RM		 8544 &other_numregs);
8545 if (vpipe != VFP11_BAD
8546 && bfd_arm_vfp11_antidependency (writemask, regs,
c7b8f16e 8547 numregs))
99059e56
RM		 8548 state = 3;
8549 else
8550 state = 2;
8551 }
8552 break;
8553
8554 case 2:
8555 {
8556 int other_regs[3], other_numregs;
8557 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
c7b8f16e 8558 other_regs,
99059e56
RM		 8559 &other_numregs);
8560 if (vpipe != VFP11_BAD
8561 && bfd_arm_vfp11_antidependency (writemask, regs,
c7b8f16e 8562 numregs))
99059e56
RM		 8563 state = 3;
8564 else
8565 {
8566 state = 0;
8567 next_i = first_fmac + 4;
8568 }
8569 }
8570 break;
8571
8572 case 3:
8573 abort (); /* Should be unreachable. */
8574 }
8575
8576 if (state == 3)
8577 {
8578 elf32_vfp11_erratum_list *newerr =(elf32_vfp11_erratum_list *)
8579 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
8580
8581 elf32_arm_section_data (sec)->erratumcount += 1;
8582
8583 newerr->u.b.vfp_insn = veneer_of_insn;
8584
8585 switch (span_type)
8586 {
8587 case 'a':
8588 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
8589 break;
8590
8591 default:
8592 abort ();
8593 }
8594
8595 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
c7b8f16e
JB		 8596 first_fmac);
8597
99059e56 8598 newerr->vma = -1;
c7b8f16e 8599
99059e56
RM		 8600 newerr->next = sec_data->erratumlist;
8601 sec_data->erratumlist = newerr;
c7b8f16e 8602
99059e56
RM		 8603 state = 0;
8604 }
c7b8f16e 8605
99059e56
RM		 8606 i = next_i;
8607 }
8608 }
906e58ca 8609
c7b8f16e 8610 if (contents != NULL
99059e56
RM		 8611 && elf_section_data (sec)->this_hdr.contents != contents)
8612 free (contents);
c7b8f16e
JB		 8613 contents = NULL;
8614 }
8615
8616 return TRUE;
8617
dc1e8a47 8618 error_return:
c7b8f16e
JB		 8619 if (contents != NULL
8620 && elf_section_data (sec)->this_hdr.contents != contents)
8621 free (contents);
906e58ca 8622
c7b8f16e
JB		 8623 return FALSE;
8624}
8625
8626/* Find virtual-memory addresses for VFP11 erratum veneers and return locations
8627 after sections have been laid out, using specially-named symbols. */
8628
8629void
8630bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
8631 struct bfd_link_info *link_info)
8632{
8633 asection *sec;
8634 struct elf32_arm_link_hash_table *globals;
8635 char *tmp_name;
906e58ca 8636
0e1862bb 8637 if (bfd_link_relocatable (link_info))
c7b8f16e 8638 return;
2e6030b9
MS		 8639
8640 /* Skip if this bfd does not correspond to an ELF image. */
0ffa91dd 8641 if (! is_arm_elf (abfd))
2e6030b9
MS		 8642 return;
8643
c7b8f16e 8644 globals = elf32_arm_hash_table (link_info);
4dfe6ac6
NC		 8645 if (globals == NULL)
8646 return;
906e58ca 8647
21d799b5 8648 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
99059e56 8649 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
7a0fb7be 8650 BFD_ASSERT (tmp_name);
c7b8f16e
JB		 8651
8652 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8653 {
8654 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
8655 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
906e58ca 8656
c7b8f16e 8657 for (; errnode != NULL; errnode = errnode->next)
99059e56
RM		 8658 {
8659 struct elf_link_hash_entry *myh;
8660 bfd_vma vma;
8661
8662 switch (errnode->type)
8663 {
8664 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
8665 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
8666 /* Find veneer symbol. */
8667 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
c7b8f16e
JB		 8668 errnode->u.b.veneer->u.v.id);
8669
99059e56
RM		 8670 myh = elf_link_hash_lookup
8671 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
c7b8f16e 8672
a504d23a 8673 if (myh == NULL)
90b6238f
AM		 8674 _bfd_error_handler (_("%pB: unable to find %s veneer `%s'"),
8675 abfd, "VFP11", tmp_name);
a504d23a
LA		 8676
8677 vma = myh->root.u.def.section->output_section->vma
8678 + myh->root.u.def.section->output_offset
8679 + myh->root.u.def.value;
8680
8681 errnode->u.b.veneer->vma = vma;
8682 break;
8683
8684 case VFP11_ERRATUM_ARM_VENEER:
8685 case VFP11_ERRATUM_THUMB_VENEER:
8686 /* Find return location. */
8687 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
8688 errnode->u.v.id);
8689
8690 myh = elf_link_hash_lookup
8691 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
8692
8693 if (myh == NULL)
90b6238f
AM		 8694 _bfd_error_handler (_("%pB: unable to find %s veneer `%s'"),
8695 abfd, "VFP11", tmp_name);
a504d23a
LA		 8696
8697 vma = myh->root.u.def.section->output_section->vma
8698 + myh->root.u.def.section->output_offset
8699 + myh->root.u.def.value;
8700
8701 errnode->u.v.branch->vma = vma;
8702 break;
8703
8704 default:
8705 abort ();
8706 }
8707 }
8708 }
8709
8710 free (tmp_name);
8711}
8712
8713/* Find virtual-memory addresses for STM32L4XX erratum veneers and
8714 return locations after sections have been laid out, using
8715 specially-named symbols. */
8716
8717void
8718bfd_elf32_arm_stm32l4xx_fix_veneer_locations (bfd *abfd,
8719 struct bfd_link_info *link_info)
8720{
8721 asection *sec;
8722 struct elf32_arm_link_hash_table *globals;
8723 char *tmp_name;
8724
8725 if (bfd_link_relocatable (link_info))
8726 return;
8727
8728 /* Skip if this bfd does not correspond to an ELF image. */
8729 if (! is_arm_elf (abfd))
8730 return;
8731
8732 globals = elf32_arm_hash_table (link_info);
8733 if (globals == NULL)
8734 return;
8735
8736 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
8737 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
7a0fb7be 8738 BFD_ASSERT (tmp_name);
a504d23a
LA		 8739
8740 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8741 {
8742 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
8743 elf32_stm32l4xx_erratum_list *errnode = sec_data->stm32l4xx_erratumlist;
8744
8745 for (; errnode != NULL; errnode = errnode->next)
8746 {
8747 struct elf_link_hash_entry *myh;
8748 bfd_vma vma;
8749
8750 switch (errnode->type)
8751 {
8752 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
8753 /* Find veneer symbol. */
8754 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
8755 errnode->u.b.veneer->u.v.id);
8756
8757 myh = elf_link_hash_lookup
8758 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
8759
8760 if (myh == NULL)
90b6238f
AM		 8761 _bfd_error_handler (_("%pB: unable to find %s veneer `%s'"),
8762 abfd, "STM32L4XX", tmp_name);
a504d23a
LA		 8763
8764 vma = myh->root.u.def.section->output_section->vma
8765 + myh->root.u.def.section->output_offset
8766 + myh->root.u.def.value;
8767
8768 errnode->u.b.veneer->vma = vma;
8769 break;
8770
8771 case STM32L4XX_ERRATUM_VENEER:
8772 /* Find return location. */
8773 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
8774 errnode->u.v.id);
8775
8776 myh = elf_link_hash_lookup
8777 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
8778
8779 if (myh == NULL)
90b6238f
AM		 8780 _bfd_error_handler (_("%pB: unable to find %s veneer `%s'"),
8781 abfd, "STM32L4XX", tmp_name);
a504d23a
LA		 8782
8783 vma = myh->root.u.def.section->output_section->vma
8784 + myh->root.u.def.section->output_offset
8785 + myh->root.u.def.value;
8786
8787 errnode->u.v.branch->vma = vma;
8788 break;
8789
8790 default:
8791 abort ();
8792 }
8793 }
8794 }
8795
8796 free (tmp_name);
8797}
8798
8799static inline bfd_boolean
8800is_thumb2_ldmia (const insn32 insn)
8801{
8802 /* Encoding T2: LDM<c>.W <Rn>{!},<registers>
8803 1110 - 1000 - 10W1 - rrrr - PM (0) l - llll - llll - llll. */
8804 return (insn & 0xffd02000) == 0xe8900000;
8805}
8806
8807static inline bfd_boolean
8808is_thumb2_ldmdb (const insn32 insn)
8809{
8810 /* Encoding T1: LDMDB<c> <Rn>{!},<registers>
8811 1110 - 1001 - 00W1 - rrrr - PM (0) l - llll - llll - llll. */
8812 return (insn & 0xffd02000) == 0xe9100000;
8813}
8814
8815static inline bfd_boolean
8816is_thumb2_vldm (const insn32 insn)
8817{
8818 /* A6.5 Extension register load or store instruction
8819 A7.7.229
9239bbd3
CM		 8820 We look for SP 32-bit and DP 64-bit registers.
8821 Encoding T1 VLDM{mode}<c> <Rn>{!}, <list>
8822 <list> is consecutive 64-bit registers
8823 1110 - 110P - UDW1 - rrrr - vvvv - 1011 - iiii - iiii
a504d23a
LA		 8824 Encoding T2 VLDM{mode}<c> <Rn>{!}, <list>
8825 <list> is consecutive 32-bit registers
8826 1110 - 110P - UDW1 - rrrr - vvvv - 1010 - iiii - iiii
8827 if P==0 && U==1 && W==1 && Rn=1101 VPOP
8828 if PUW=010 || PUW=011 || PUW=101 VLDM. */
8829 return
9239bbd3
CM		 8830 (((insn & 0xfe100f00) == 0xec100b00) ||
8831 ((insn & 0xfe100f00) == 0xec100a00))
a504d23a
LA		 8832 && /* (IA without !). */
8833 (((((insn << 7) >> 28) & 0xd) == 0x4)
9239bbd3 8834 /* (IA with !), includes VPOP (when reg number is SP). */
a504d23a
LA		 8835 || ((((insn << 7) >> 28) & 0xd) == 0x5)
8836 /* (DB with !). */
8837 || ((((insn << 7) >> 28) & 0xd) == 0x9));
8838}
8839
8840/* STM STM32L4XX erratum : This function assumes that it receives an LDM or
8841 VLDM opcode and:
8842 - computes the number and the mode of memory accesses
8843 - decides if the replacement should be done:
8844 . replaces only if > 8-word accesses
8845 . or (testing purposes only) replaces all accesses. */
8846
8847static bfd_boolean
8848stm32l4xx_need_create_replacing_stub (const insn32 insn,
8849 bfd_arm_stm32l4xx_fix stm32l4xx_fix)
8850{
9239bbd3 8851 int nb_words = 0;
a504d23a
LA		 8852
8853 /* The field encoding the register list is the same for both LDMIA
8854 and LDMDB encodings. */
8855 if (is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn))
b25e998d 8856 nb_words = elf32_arm_popcount (insn & 0x0000ffff);
a504d23a 8857 else if (is_thumb2_vldm (insn))
9239bbd3 8858 nb_words = (insn & 0xff);
a504d23a
LA		 8859
8860 /* DEFAULT mode accounts for the real bug condition situation,
8861 ALL mode inserts stubs for each LDM/VLDM instruction (testing). */
8862 return
9239bbd3 8863 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_DEFAULT) ? nb_words > 8 :
a504d23a
LA		 8864 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_ALL) ? TRUE : FALSE;
8865}
8866
8867/* Look for potentially-troublesome code sequences which might trigger
8868 the STM STM32L4XX erratum. */
8869
8870bfd_boolean
8871bfd_elf32_arm_stm32l4xx_erratum_scan (bfd *abfd,
8872 struct bfd_link_info *link_info)
8873{
8874 asection *sec;
8875 bfd_byte *contents = NULL;
8876 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
8877
8878 if (globals == NULL)
8879 return FALSE;
8880
8881 /* If we are only performing a partial link do not bother
8882 to construct any glue. */
8883 if (bfd_link_relocatable (link_info))
8884 return TRUE;
8885
8886 /* Skip if this bfd does not correspond to an ELF image. */
8887 if (! is_arm_elf (abfd))
8888 return TRUE;
8889
8890 if (globals->stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_NONE)
8891 return TRUE;
8892
8893 /* Skip this BFD if it corresponds to an executable or dynamic object. */
8894 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
8895 return TRUE;
8896
8897 for (sec = abfd->sections; sec != NULL; sec = sec->next)
8898 {
8899 unsigned int i, span;
8900 struct _arm_elf_section_data *sec_data;
8901
8902 /* If we don't have executable progbits, we're not interested in this
8903 section. Also skip if section is to be excluded. */
8904 if (elf_section_type (sec) != SHT_PROGBITS
8905 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
8906 || (sec->flags & SEC_EXCLUDE) != 0
8907 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8908 || sec->output_section == bfd_abs_section_ptr
8909 || strcmp (sec->name, STM32L4XX_ERRATUM_VENEER_SECTION_NAME) == 0)
8910 continue;
8911
8912 sec_data = elf32_arm_section_data (sec);
c7b8f16e 8913
a504d23a
LA		 8914 if (sec_data->mapcount == 0)
8915 continue;
c7b8f16e 8916
a504d23a
LA		 8917 if (elf_section_data (sec)->this_hdr.contents != NULL)
8918 contents = elf_section_data (sec)->this_hdr.contents;
8919 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
8920 goto error_return;
c7b8f16e 8921
a504d23a
LA		 8922 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
8923 elf32_arm_compare_mapping);
c7b8f16e 8924
a504d23a
LA		 8925 for (span = 0; span < sec_data->mapcount; span++)
8926 {
8927 unsigned int span_start = sec_data->map[span].vma;
8928 unsigned int span_end = (span == sec_data->mapcount - 1)
8929 ? sec->size : sec_data->map[span + 1].vma;
8930 char span_type = sec_data->map[span].type;
8931 int itblock_current_pos = 0;
c7b8f16e 8932
a504d23a
LA		 8933 /* Only Thumb2 mode need be supported with this CM4 specific
8934 code, we should not encounter any arm mode eg span_type
8935 != 'a'. */
8936 if (span_type != 't')
8937 continue;
c7b8f16e 8938
a504d23a
LA		 8939 for (i = span_start; i < span_end;)
8940 {
8941 unsigned int insn = bfd_get_16 (abfd, &contents[i]);
8942 bfd_boolean insn_32bit = FALSE;
8943 bfd_boolean is_ldm = FALSE;
8944 bfd_boolean is_vldm = FALSE;
8945 bfd_boolean is_not_last_in_it_block = FALSE;
8946
8947 /* The first 16-bits of all 32-bit thumb2 instructions start
8948 with opcode[15..13]=0b111 and the encoded op1 can be anything
8949 except opcode[12..11]!=0b00.
8950 See 32-bit Thumb instruction encoding. */
8951 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
8952 insn_32bit = TRUE;
c7b8f16e 8953
a504d23a
LA		 8954 /* Compute the predicate that tells if the instruction
8955 is concerned by the IT block
8956 - Creates an error if there is a ldm that is not
8957 last in the IT block thus cannot be replaced
8958 - Otherwise we can create a branch at the end of the
8959 IT block, it will be controlled naturally by IT
8960 with the proper pseudo-predicate
8961 - So the only interesting predicate is the one that
8962 tells that we are not on the last item of an IT
8963 block. */
8964 if (itblock_current_pos != 0)
8965 is_not_last_in_it_block = !!--itblock_current_pos;
906e58ca 8966
a504d23a
LA		 8967 if (insn_32bit)
8968 {
8969 /* Load the rest of the insn (in manual-friendly order). */
8970 insn = (insn << 16) | bfd_get_16 (abfd, &contents[i + 2]);
8971 is_ldm = is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn);
8972 is_vldm = is_thumb2_vldm (insn);
8973
8974 /* Veneers are created for (v)ldm depending on
8975 option flags and memory accesses conditions; but
8976 if the instruction is not the last instruction of
8977 an IT block, we cannot create a jump there, so we
8978 bail out. */
5025eb7c
AO		 8979 if ((is_ldm || is_vldm)
8980 && stm32l4xx_need_create_replacing_stub
a504d23a
LA		 8981 (insn, globals->stm32l4xx_fix))
8982 {
8983 if (is_not_last_in_it_block)
8984 {
4eca0228 8985 _bfd_error_handler
695344c0 8986 /* xgettext:c-format */
871b3ab2 8987 (_("%pB(%pA+%#x): error: multiple load detected"
90b6238f
AM		 8988 " in non-last IT block instruction:"
8989 " STM32L4XX veneer cannot be generated; "
8990 "use gcc option -mrestrict-it to generate"
8991 " only one instruction per IT block"),
d42c267e 8992 abfd, sec, i);
a504d23a
LA		 8993 }
8994 else
8995 {
8996 elf32_stm32l4xx_erratum_list *newerr =
8997 (elf32_stm32l4xx_erratum_list *)
8998 bfd_zmalloc
8999 (sizeof (elf32_stm32l4xx_erratum_list));
9000
9001 elf32_arm_section_data (sec)
9002 ->stm32l4xx_erratumcount += 1;
9003 newerr->u.b.insn = insn;
9004 /* We create only thumb branches. */
9005 newerr->type =
9006 STM32L4XX_ERRATUM_BRANCH_TO_VENEER;
9007 record_stm32l4xx_erratum_veneer
9008 (link_info, newerr, abfd, sec,
9009 i,
9010 is_ldm ?
9011 STM32L4XX_ERRATUM_LDM_VENEER_SIZE:
9012 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
9013 newerr->vma = -1;
9014 newerr->next = sec_data->stm32l4xx_erratumlist;
9015 sec_data->stm32l4xx_erratumlist = newerr;
9016 }
9017 }
9018 }
9019 else
9020 {
9021 /* A7.7.37 IT p208
9022 IT blocks are only encoded in T1
9023 Encoding T1: IT{x{y{z}}} <firstcond>
9024 1 0 1 1 - 1 1 1 1 - firstcond - mask
9025 if mask = '0000' then see 'related encodings'
9026 We don't deal with UNPREDICTABLE, just ignore these.
9027 There can be no nested IT blocks so an IT block
9028 is naturally a new one for which it is worth
9029 computing its size. */
5025eb7c
AO		 9030 bfd_boolean is_newitblock = ((insn & 0xff00) == 0xbf00)
9031 && ((insn & 0x000f) != 0x0000);
a504d23a
LA		 9032 /* If we have a new IT block we compute its size. */
9033 if (is_newitblock)
9034 {
9035 /* Compute the number of instructions controlled
9036 by the IT block, it will be used to decide
9037 whether we are inside an IT block or not. */
9038 unsigned int mask = insn & 0x000f;
9039 itblock_current_pos = 4 - ctz (mask);
9040 }
9041 }
9042
9043 i += insn_32bit ? 4 : 2;
99059e56
RM		 9044 }
9045 }
a504d23a
LA		 9046
9047 if (contents != NULL
9048 && elf_section_data (sec)->this_hdr.contents != contents)
9049 free (contents);
9050 contents = NULL;
c7b8f16e 9051 }
906e58ca 9052
a504d23a
LA		 9053 return TRUE;
9054
dc1e8a47 9055 error_return:
a504d23a
LA		 9056 if (contents != NULL
9057 && elf_section_data (sec)->this_hdr.contents != contents)
9058 free (contents);
c7b8f16e 9059
a504d23a
LA		 9060 return FALSE;
9061}
c7b8f16e 9062
eb043451
PB		 9063/* Set target relocation values needed during linking. */
9064
9065void
68c39892 9066bfd_elf32_arm_set_target_params (struct bfd *output_bfd,
bf21ed78 9067 struct bfd_link_info *link_info,
68c39892 9068 struct elf32_arm_params *params)
eb043451
PB		 9069{
9070 struct elf32_arm_link_hash_table *globals;
9071
9072 globals = elf32_arm_hash_table (link_info);
4dfe6ac6
NC		 9073 if (globals == NULL)
9074 return;
eb043451 9075
68c39892 9076 globals->target1_is_rel = params->target1_is_rel;
29e9b073
CL		 9077 if (globals->fdpic_p)
9078 globals->target2_reloc = R_ARM_GOT32;
9079 else if (strcmp (params->target2_type, "rel") == 0)
eb043451 9080 globals->target2_reloc = R_ARM_REL32;
68c39892 9081 else if (strcmp (params->target2_type, "abs") == 0)
eeac373a 9082 globals->target2_reloc = R_ARM_ABS32;
68c39892 9083 else if (strcmp (params->target2_type, "got-rel") == 0)
eb043451
PB		 9084 globals->target2_reloc = R_ARM_GOT_PREL;
9085 else
9086 {
90b6238f 9087 _bfd_error_handler (_("invalid TARGET2 relocation type '%s'"),
68c39892 9088 params->target2_type);
eb043451 9089 }
68c39892
TP		 9090 globals->fix_v4bx = params->fix_v4bx;
9091 globals->use_blx |= params->use_blx;
9092 globals->vfp11_fix = params->vfp11_denorm_fix;
9093 globals->stm32l4xx_fix = params->stm32l4xx_fix;
e8b09b87
CL		 9094 if (globals->fdpic_p)
9095 globals->pic_veneer = 1;
9096 else
9097 globals->pic_veneer = params->pic_veneer;
68c39892
TP		 9098 globals->fix_cortex_a8 = params->fix_cortex_a8;
9099 globals->fix_arm1176 = params->fix_arm1176;
9100 globals->cmse_implib = params->cmse_implib;
9101 globals->in_implib_bfd = params->in_implib_bfd;
bf21ed78 9102
0ffa91dd 9103 BFD_ASSERT (is_arm_elf (output_bfd));
68c39892
TP		 9104 elf_arm_tdata (output_bfd)->no_enum_size_warning
9105 = params->no_enum_size_warning;
9106 elf_arm_tdata (output_bfd)->no_wchar_size_warning
9107 = params->no_wchar_size_warning;
eb043451 9108}
eb043451 9109
12a0a0fd 9110/* Replace the target offset of a Thumb bl or b.w instruction. */
252b5132 9111
12a0a0fd
PB		 9112static void
9113insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
9114{
9115 bfd_vma upper;
9116 bfd_vma lower;
9117 int reloc_sign;
9118
9119 BFD_ASSERT ((offset & 1) == 0);
9120
9121 upper = bfd_get_16 (abfd, insn);
9122 lower = bfd_get_16 (abfd, insn + 2);
9123 reloc_sign = (offset < 0) ? 1 : 0;
9124 upper = (upper & ~(bfd_vma) 0x7ff)
9125 | ((offset >> 12) & 0x3ff)
9126 | (reloc_sign << 10);
906e58ca 9127 lower = (lower & ~(bfd_vma) 0x2fff)
12a0a0fd
PB		 9128 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
9129 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
9130 | ((offset >> 1) & 0x7ff);
9131 bfd_put_16 (abfd, upper, insn);
9132 bfd_put_16 (abfd, lower, insn + 2);
252b5132
RH		 9133}
9134
9b485d32
NC		 9135/* Thumb code calling an ARM function. */
9136
252b5132 9137static int
57e8b36a 9138elf32_thumb_to_arm_stub (struct bfd_link_info * info,
07d6d2b8
AM		 9139 const char * name,
9140 bfd * input_bfd,
9141 bfd * output_bfd,
9142 asection * input_section,
9143 bfd_byte * hit_data,
9144 asection * sym_sec,
9145 bfd_vma offset,
9146 bfd_signed_vma addend,
9147 bfd_vma val,
f2a9dd69 9148 char **error_message)
252b5132 9149{
bcbdc74c 9150 asection * s = 0;
dc810e39 9151 bfd_vma my_offset;
252b5132 9152 long int ret_offset;
bcbdc74c
NC		 9153 struct elf_link_hash_entry * myh;
9154 struct elf32_arm_link_hash_table * globals;
252b5132 9155
f2a9dd69 9156 myh = find_thumb_glue (info, name, error_message);
252b5132 9157 if (myh == NULL)
b34976b6 9158 return FALSE;
252b5132
RH		 9159
9160 globals = elf32_arm_hash_table (info);
252b5132
RH		 9161 BFD_ASSERT (globals != NULL);
9162 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9163
9164 my_offset = myh->root.u.def.value;
9165
3d4d4302
AM		 9166 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
9167 THUMB2ARM_GLUE_SECTION_NAME);
252b5132
RH		 9168
9169 BFD_ASSERT (s != NULL);
9170 BFD_ASSERT (s->contents != NULL);
9171 BFD_ASSERT (s->output_section != NULL);
9172
9173 if ((my_offset & 0x01) == 0x01)
9174 {
9175 if (sym_sec != NULL
9176 && sym_sec->owner != NULL
9177 && !INTERWORK_FLAG (sym_sec->owner))
9178 {
4eca0228 9179 _bfd_error_handler
90b6238f
AM		 9180 (_("%pB(%s): warning: interworking not enabled;"
9181 " first occurrence: %pB: %s call to %s"),
9182 sym_sec->owner, name, input_bfd, "Thumb", "ARM");
252b5132 9183
b34976b6 9184 return FALSE;
252b5132
RH		 9185 }
9186
9187 --my_offset;
9188 myh->root.u.def.value = my_offset;
9189
52ab56c2
PB		 9190 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
9191 s->contents + my_offset);
252b5132 9192
52ab56c2
PB		 9193 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
9194 s->contents + my_offset + 2);
252b5132
RH		 9195
9196 ret_offset =
9b485d32
NC		 9197 /* Address of destination of the stub. */
9198 ((bfd_signed_vma) val)
252b5132 9199 - ((bfd_signed_vma)
57e8b36a
NC		 9200 /* Offset from the start of the current section
9201 to the start of the stubs. */
9b485d32
NC		 9202 (s->output_offset
9203 /* Offset of the start of this stub from the start of the stubs. */
9204 + my_offset
9205 /* Address of the start of the current section. */
9206 + s->output_section->vma)
9207 /* The branch instruction is 4 bytes into the stub. */
9208 + 4
9209 /* ARM branches work from the pc of the instruction + 8. */
9210 + 8);
252b5132 9211
52ab56c2
PB		 9212 put_arm_insn (globals, output_bfd,
9213 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
9214 s->contents + my_offset + 4);
252b5132
RH		 9215 }
9216
9217 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
9218
427bfd90
NC		 9219 /* Now go back and fix up the original BL insn to point to here. */
9220 ret_offset =
9221 /* Address of where the stub is located. */
9222 (s->output_section->vma + s->output_offset + my_offset)
9223 /* Address of where the BL is located. */
57e8b36a
NC		 9224 - (input_section->output_section->vma + input_section->output_offset
9225 + offset)
427bfd90
NC		 9226 /* Addend in the relocation. */
9227 - addend
9228 /* Biassing for PC-relative addressing. */
9229 - 8;
252b5132 9230
12a0a0fd 9231 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
252b5132 9232
b34976b6 9233 return TRUE;
252b5132
RH		 9234}
9235
a4fd1a8e 9236/* Populate an Arm to Thumb stub. Returns the stub symbol. */
9b485d32 9237
a4fd1a8e
PB		 9238static struct elf_link_hash_entry *
9239elf32_arm_create_thumb_stub (struct bfd_link_info * info,
07d6d2b8
AM		 9240 const char * name,
9241 bfd * input_bfd,
9242 bfd * output_bfd,
9243 asection * sym_sec,
9244 bfd_vma val,
9245 asection * s,
9246 char ** error_message)
252b5132 9247{
dc810e39 9248 bfd_vma my_offset;
252b5132 9249 long int ret_offset;
bcbdc74c
NC		 9250 struct elf_link_hash_entry * myh;
9251 struct elf32_arm_link_hash_table * globals;
252b5132 9252
f2a9dd69 9253 myh = find_arm_glue (info, name, error_message);
252b5132 9254 if (myh == NULL)
a4fd1a8e 9255 return NULL;
252b5132
RH		 9256
9257 globals = elf32_arm_hash_table (info);
252b5132
RH		 9258 BFD_ASSERT (globals != NULL);
9259 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9260
9261 my_offset = myh->root.u.def.value;
252b5132
RH		 9262
9263 if ((my_offset & 0x01) == 0x01)
9264 {
9265 if (sym_sec != NULL
9266 && sym_sec->owner != NULL
9267 && !INTERWORK_FLAG (sym_sec->owner))
9268 {
4eca0228 9269 _bfd_error_handler
90b6238f
AM		 9270 (_("%pB(%s): warning: interworking not enabled;"
9271 " first occurrence: %pB: %s call to %s"),
9272 sym_sec->owner, name, input_bfd, "ARM", "Thumb");
252b5132 9273 }
9b485d32 9274
252b5132
RH		 9275 --my_offset;
9276 myh->root.u.def.value = my_offset;
9277
0e1862bb
L		 9278 if (bfd_link_pic (info)
9279 || globals->root.is_relocatable_executable
27e55c4d 9280 || globals->pic_veneer)
8f6277f5
PB		 9281 {
9282 /* For relocatable objects we can't use absolute addresses,
9283 so construct the address from a relative offset. */
9284 /* TODO: If the offset is small it's probably worth
9285 constructing the address with adds. */
52ab56c2
PB		 9286 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
9287 s->contents + my_offset);
9288 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
9289 s->contents + my_offset + 4);
9290 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
9291 s->contents + my_offset + 8);
8f6277f5
PB		 9292 /* Adjust the offset by 4 for the position of the add,
9293 and 8 for the pipeline offset. */
9294 ret_offset = (val - (s->output_offset
9295 + s->output_section->vma
9296 + my_offset + 12))
9297 | 1;
9298 bfd_put_32 (output_bfd, ret_offset,
9299 s->contents + my_offset + 12);
9300 }
26079076
PB		 9301 else if (globals->use_blx)
9302 {
9303 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
9304 s->contents + my_offset);
9305
9306 /* It's a thumb address. Add the low order bit. */
9307 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
9308 s->contents + my_offset + 4);
9309 }
8f6277f5
PB		 9310 else
9311 {
52ab56c2
PB		 9312 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
9313 s->contents + my_offset);
252b5132 9314
52ab56c2
PB		 9315 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
9316 s->contents + my_offset + 4);
252b5132 9317
8f6277f5
PB		 9318 /* It's a thumb address. Add the low order bit. */
9319 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
9320 s->contents + my_offset + 8);
8029a119
NC		 9321
9322 my_offset += 12;
8f6277f5 9323 }
252b5132
RH		 9324 }
9325
9326 BFD_ASSERT (my_offset <= globals->arm_glue_size);
9327
a4fd1a8e
PB		 9328 return myh;
9329}
9330
9331/* Arm code calling a Thumb function. */
9332
9333static int
9334elf32_arm_to_thumb_stub (struct bfd_link_info * info,
07d6d2b8
AM		 9335 const char * name,
9336 bfd * input_bfd,
9337 bfd * output_bfd,
9338 asection * input_section,
9339 bfd_byte * hit_data,
9340 asection * sym_sec,
9341 bfd_vma offset,
9342 bfd_signed_vma addend,
9343 bfd_vma val,
f2a9dd69 9344 char **error_message)
a4fd1a8e
PB		 9345{
9346 unsigned long int tmp;
9347 bfd_vma my_offset;
9348 asection * s;
9349 long int ret_offset;
9350 struct elf_link_hash_entry * myh;
9351 struct elf32_arm_link_hash_table * globals;
9352
9353 globals = elf32_arm_hash_table (info);
a4fd1a8e
PB		 9354 BFD_ASSERT (globals != NULL);
9355 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9356
3d4d4302
AM		 9357 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
9358 ARM2THUMB_GLUE_SECTION_NAME);
a4fd1a8e
PB		 9359 BFD_ASSERT (s != NULL);
9360 BFD_ASSERT (s->contents != NULL);
9361 BFD_ASSERT (s->output_section != NULL);
9362
9363 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
f2a9dd69 9364 sym_sec, val, s, error_message);
a4fd1a8e
PB		 9365 if (!myh)
9366 return FALSE;
9367
9368 my_offset = myh->root.u.def.value;
252b5132
RH		 9369 tmp = bfd_get_32 (input_bfd, hit_data);
9370 tmp = tmp & 0xFF000000;
9371
9b485d32 9372 /* Somehow these are both 4 too far, so subtract 8. */
dc810e39
AM		 9373 ret_offset = (s->output_offset
9374 + my_offset
9375 + s->output_section->vma
9376 - (input_section->output_offset
9377 + input_section->output_section->vma
9378 + offset + addend)
9379 - 8);
9a5aca8c 9380
252b5132
RH		 9381 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
9382
dc810e39 9383 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
252b5132 9384
b34976b6 9385 return TRUE;
252b5132
RH		 9386}
9387
a4fd1a8e
PB		 9388/* Populate Arm stub for an exported Thumb function. */
9389
9390static bfd_boolean
9391elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
9392{
9393 struct bfd_link_info * info = (struct bfd_link_info *) inf;
9394 asection * s;
9395 struct elf_link_hash_entry * myh;
9396 struct elf32_arm_link_hash_entry *eh;
9397 struct elf32_arm_link_hash_table * globals;
9398 asection *sec;
9399 bfd_vma val;
f2a9dd69 9400 char *error_message;
a4fd1a8e 9401
906e58ca 9402 eh = elf32_arm_hash_entry (h);
a4fd1a8e
PB		 9403 /* Allocate stubs for exported Thumb functions on v4t. */
9404 if (eh->export_glue == NULL)
9405 return TRUE;
9406
9407 globals = elf32_arm_hash_table (info);
a4fd1a8e
PB		 9408 BFD_ASSERT (globals != NULL);
9409 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9410
3d4d4302
AM		 9411 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
9412 ARM2THUMB_GLUE_SECTION_NAME);
a4fd1a8e
PB		 9413 BFD_ASSERT (s != NULL);
9414 BFD_ASSERT (s->contents != NULL);
9415 BFD_ASSERT (s->output_section != NULL);
9416
9417 sec = eh->export_glue->root.u.def.section;
0eaedd0e
PB		 9418
9419 BFD_ASSERT (sec->output_section != NULL);
9420
a4fd1a8e
PB		 9421 val = eh->export_glue->root.u.def.value + sec->output_offset
9422 + sec->output_section->vma;
8029a119 9423
a4fd1a8e
PB		 9424 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
9425 h->root.u.def.section->owner,
f2a9dd69
DJ		 9426 globals->obfd, sec, val, s,
9427 &error_message);
a4fd1a8e
PB		 9428 BFD_ASSERT (myh);
9429 return TRUE;
9430}
9431
845b51d6
PB		 9432/* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
9433
9434static bfd_vma
9435elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
9436{
9437 bfd_byte *p;
9438 bfd_vma glue_addr;
9439 asection *s;
9440 struct elf32_arm_link_hash_table *globals;
9441
9442 globals = elf32_arm_hash_table (info);
845b51d6
PB		 9443 BFD_ASSERT (globals != NULL);
9444 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
9445
3d4d4302
AM		 9446 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
9447 ARM_BX_GLUE_SECTION_NAME);
845b51d6
PB		 9448 BFD_ASSERT (s != NULL);
9449 BFD_ASSERT (s->contents != NULL);
9450 BFD_ASSERT (s->output_section != NULL);
9451
9452 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
9453
9454 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
9455
9456 if ((globals->bx_glue_offset[reg] & 1) == 0)
9457 {
9458 p = s->contents + glue_addr;
9459 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
9460 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
9461 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
9462 globals->bx_glue_offset[reg] |= 1;
9463 }
9464
9465 return glue_addr + s->output_section->vma + s->output_offset;
9466}
9467
a4fd1a8e
PB		 9468/* Generate Arm stubs for exported Thumb symbols. */
9469static void
906e58ca 9470elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
a4fd1a8e
PB		 9471 struct bfd_link_info *link_info)
9472{
9473 struct elf32_arm_link_hash_table * globals;
9474
8029a119
NC		 9475 if (link_info == NULL)
9476 /* Ignore this if we are not called by the ELF backend linker. */
a4fd1a8e
PB		 9477 return;
9478
9479 globals = elf32_arm_hash_table (link_info);
4dfe6ac6
NC		 9480 if (globals == NULL)
9481 return;
9482
84c08195
PB		 9483 /* If blx is available then exported Thumb symbols are OK and there is
9484 nothing to do. */
a4fd1a8e
PB		 9485 if (globals->use_blx)
9486 return;
9487
9488 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
9489 link_info);
9490}
9491
47beaa6a
RS		 9492/* Reserve space for COUNT dynamic relocations in relocation selection
9493 SRELOC. */
9494
9495static void
9496elf32_arm_allocate_dynrelocs (struct bfd_link_info *info, asection *sreloc,
9497 bfd_size_type count)
9498{
9499 struct elf32_arm_link_hash_table *htab;
9500
9501 htab = elf32_arm_hash_table (info);
9502 BFD_ASSERT (htab->root.dynamic_sections_created);
9503 if (sreloc == NULL)
9504 abort ();
9505 sreloc->size += RELOC_SIZE (htab) * count;
9506}
9507
34e77a92
RS		 9508/* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
9509 dynamic, the relocations should go in SRELOC, otherwise they should
9510 go in the special .rel.iplt section. */
9511
9512static void
9513elf32_arm_allocate_irelocs (struct bfd_link_info *info, asection *sreloc,
9514 bfd_size_type count)
9515{
9516 struct elf32_arm_link_hash_table *htab;
9517
9518 htab = elf32_arm_hash_table (info);
9519 if (!htab->root.dynamic_sections_created)
9520 htab->root.irelplt->size += RELOC_SIZE (htab) * count;
9521 else
9522 {
9523 BFD_ASSERT (sreloc != NULL);
9524 sreloc->size += RELOC_SIZE (htab) * count;
9525 }
9526}
9527
47beaa6a
RS		 9528/* Add relocation REL to the end of relocation section SRELOC. */
9529
9530static void
9531elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info,
9532 asection *sreloc, Elf_Internal_Rela *rel)
9533{
9534 bfd_byte *loc;
9535 struct elf32_arm_link_hash_table *htab;
9536
9537 htab = elf32_arm_hash_table (info);
34e77a92
RS		 9538 if (!htab->root.dynamic_sections_created
9539 && ELF32_R_TYPE (rel->r_info) == R_ARM_IRELATIVE)
9540 sreloc = htab->root.irelplt;
47beaa6a
RS		 9541 if (sreloc == NULL)
9542 abort ();
9543 loc = sreloc->contents;
9544 loc += sreloc->reloc_count++ * RELOC_SIZE (htab);
9545 if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size)
9546 abort ();
9547 SWAP_RELOC_OUT (htab) (output_bfd, rel, loc);
9548}
9549
34e77a92
RS		 9550/* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
9551 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
9552 to .plt. */
9553
9554static void
9555elf32_arm_allocate_plt_entry (struct bfd_link_info *info,
9556 bfd_boolean is_iplt_entry,
9557 union gotplt_union *root_plt,
9558 struct arm_plt_info *arm_plt)
9559{
9560 struct elf32_arm_link_hash_table *htab;
9561 asection *splt;
9562 asection *sgotplt;
9563
9564 htab = elf32_arm_hash_table (info);
9565
9566 if (is_iplt_entry)
9567 {
9568 splt = htab->root.iplt;
9569 sgotplt = htab->root.igotplt;
9570
99059e56
RM		 9571 /* NaCl uses a special first entry in .iplt too. */
9572 if (htab->nacl_p && splt->size == 0)
9573 splt->size += htab->plt_header_size;
9574
34e77a92
RS		 9575 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
9576 elf32_arm_allocate_irelocs (info, htab->root.irelplt, 1);
9577 }
9578 else
9579 {
9580 splt = htab->root.splt;
9581 sgotplt = htab->root.sgotplt;
9582
7801f98f
CL		 9583 if (htab->fdpic_p)
9584 {
9585 /* Allocate room for R_ARM_FUNCDESC_VALUE. */
9586 /* For lazy binding, relocations will be put into .rel.plt, in
9587 .rel.got otherwise. */
9588 /* FIXME: today we don't support lazy binding so put it in .rel.got */
9589 if (info->flags & DF_BIND_NOW)
9590 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
9591 else
9592 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
9593 }
9594 else
9595 {
9596 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
9597 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
9598 }
34e77a92
RS		 9599
9600 /* If this is the first .plt entry, make room for the special
9601 first entry. */
9602 if (splt->size == 0)
9603 splt->size += htab->plt_header_size;
9f19ab6d
WN		 9604
9605 htab->next_tls_desc_index++;
34e77a92
RS		 9606 }
9607
9608 /* Allocate the PLT entry itself, including any leading Thumb stub. */
9609 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
9610 splt->size += PLT_THUMB_STUB_SIZE;
9611 root_plt->offset = splt->size;
9612 splt->size += htab->plt_entry_size;
9613
9614 if (!htab->symbian_p)
9615 {
9616 /* We also need to make an entry in the .got.plt section, which
9617 will be placed in the .got section by the linker script. */
9f19ab6d
WN		 9618 if (is_iplt_entry)
9619 arm_plt->got_offset = sgotplt->size;
9620 else
9621 arm_plt->got_offset = sgotplt->size - 8 * htab->num_tls_desc;
7801f98f
CL		 9622 if (htab->fdpic_p)
9623 /* Function descriptor takes 64 bits in GOT. */
4b24dd1a 9624 sgotplt->size += 8;
7801f98f
CL		 9625 else
9626 sgotplt->size += 4;
34e77a92
RS		 9627 }
9628}
9629
b38cadfb
NC		 9630static bfd_vma
9631arm_movw_immediate (bfd_vma value)
9632{
9633 return (value & 0x00000fff) | ((value & 0x0000f000) << 4);
9634}
9635
9636static bfd_vma
9637arm_movt_immediate (bfd_vma value)
9638{
9639 return ((value & 0x0fff0000) >> 16) | ((value & 0xf0000000) >> 12);
9640}
9641
34e77a92
RS		 9642/* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
9643 the entry lives in .iplt and resolves to (*SYM_VALUE)().
9644 Otherwise, DYNINDX is the index of the symbol in the dynamic
9645 symbol table and SYM_VALUE is undefined.
9646
9647 ROOT_PLT points to the offset of the PLT entry from the start of its
9648 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
57460bcf 9649 bookkeeping information.
34e77a92 9650
57460bcf
NC		 9651 Returns FALSE if there was a problem. */
9652
9653static bfd_boolean
34e77a92
RS		 9654elf32_arm_populate_plt_entry (bfd *output_bfd, struct bfd_link_info *info,
9655 union gotplt_union *root_plt,
9656 struct arm_plt_info *arm_plt,
9657 int dynindx, bfd_vma sym_value)
9658{
9659 struct elf32_arm_link_hash_table *htab;
9660 asection *sgot;
9661 asection *splt;
9662 asection *srel;
9663 bfd_byte *loc;
9664 bfd_vma plt_index;
9665 Elf_Internal_Rela rel;
9666 bfd_vma plt_header_size;
9667 bfd_vma got_header_size;
9668
9669 htab = elf32_arm_hash_table (info);
9670
9671 /* Pick the appropriate sections and sizes. */
9672 if (dynindx == -1)
9673 {
9674 splt = htab->root.iplt;
9675 sgot = htab->root.igotplt;
9676 srel = htab->root.irelplt;
9677
9678 /* There are no reserved entries in .igot.plt, and no special
9679 first entry in .iplt. */
9680 got_header_size = 0;
9681 plt_header_size = 0;
9682 }
9683 else
9684 {
9685 splt = htab->root.splt;
9686 sgot = htab->root.sgotplt;
9687 srel = htab->root.srelplt;
9688
9689 got_header_size = get_elf_backend_data (output_bfd)->got_header_size;
9690 plt_header_size = htab->plt_header_size;
9691 }
9692 BFD_ASSERT (splt != NULL && srel != NULL);
9693
9694 /* Fill in the entry in the procedure linkage table. */
9695 if (htab->symbian_p)
9696 {
9697 BFD_ASSERT (dynindx >= 0);
9698 put_arm_insn (htab, output_bfd,
9699 elf32_arm_symbian_plt_entry[0],
9700 splt->contents + root_plt->offset);
9701 bfd_put_32 (output_bfd,
9702 elf32_arm_symbian_plt_entry[1],
9703 splt->contents + root_plt->offset + 4);
9704
9705 /* Fill in the entry in the .rel.plt section. */
9706 rel.r_offset = (splt->output_section->vma
9707 + splt->output_offset
9708 + root_plt->offset + 4);
9709 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_GLOB_DAT);
9710
9711 /* Get the index in the procedure linkage table which
9712 corresponds to this symbol. This is the index of this symbol
9713 in all the symbols for which we are making plt entries. The
9714 first entry in the procedure linkage table is reserved. */
9715 plt_index = ((root_plt->offset - plt_header_size)
9716 / htab->plt_entry_size);
9717 }
9718 else
9719 {
9720 bfd_vma got_offset, got_address, plt_address;
9721 bfd_vma got_displacement, initial_got_entry;
9722 bfd_byte * ptr;
9723
9724 BFD_ASSERT (sgot != NULL);
9725
9726 /* Get the offset into the .(i)got.plt table of the entry that
9727 corresponds to this function. */
9728 got_offset = (arm_plt->got_offset & -2);
9729
9730 /* Get the index in the procedure linkage table which
9731 corresponds to this symbol. This is the index of this symbol
9732 in all the symbols for which we are making plt entries.
9733 After the reserved .got.plt entries, all symbols appear in
9734 the same order as in .plt. */
7801f98f 9735 if (htab->fdpic_p)
4b24dd1a
AM		 9736 /* Function descriptor takes 8 bytes. */
9737 plt_index = (got_offset - got_header_size) / 8;
7801f98f 9738 else
4b24dd1a 9739 plt_index = (got_offset - got_header_size) / 4;
34e77a92
RS		 9740
9741 /* Calculate the address of the GOT entry. */
9742 got_address = (sgot->output_section->vma
9743 + sgot->output_offset
9744 + got_offset);
9745
9746 /* ...and the address of the PLT entry. */
9747 plt_address = (splt->output_section->vma
9748 + splt->output_offset
9749 + root_plt->offset);
9750
9751 ptr = splt->contents + root_plt->offset;
0e1862bb 9752 if (htab->vxworks_p && bfd_link_pic (info))
34e77a92
RS		 9753 {
9754 unsigned int i;
9755 bfd_vma val;
9756
9757 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
9758 {
9759 val = elf32_arm_vxworks_shared_plt_entry[i];
9760 if (i == 2)
9761 val |= got_address - sgot->output_section->vma;
9762 if (i == 5)
9763 val |= plt_index * RELOC_SIZE (htab);
9764 if (i == 2 || i == 5)
9765 bfd_put_32 (output_bfd, val, ptr);
9766 else
9767 put_arm_insn (htab, output_bfd, val, ptr);
9768 }
9769 }
9770 else if (htab->vxworks_p)
9771 {
9772 unsigned int i;
9773 bfd_vma val;
9774
9775 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
9776 {
9777 val = elf32_arm_vxworks_exec_plt_entry[i];
9778 if (i == 2)
9779 val |= got_address;
9780 if (i == 4)
9781 val |= 0xffffff & -((root_plt->offset + i * 4 + 8) >> 2);
9782 if (i == 5)
9783 val |= plt_index * RELOC_SIZE (htab);
9784 if (i == 2 || i == 5)
9785 bfd_put_32 (output_bfd, val, ptr);
9786 else
9787 put_arm_insn (htab, output_bfd, val, ptr);
9788 }
9789
9790 loc = (htab->srelplt2->contents
9791 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
9792
9793 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
9794 referencing the GOT for this PLT entry. */
9795 rel.r_offset = plt_address + 8;
9796 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9797 rel.r_addend = got_offset;
9798 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9799 loc += RELOC_SIZE (htab);
9800
9801 /* Create the R_ARM_ABS32 relocation referencing the
9802 beginning of the PLT for this GOT entry. */
9803 rel.r_offset = got_address;
9804 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9805 rel.r_addend = 0;
9806 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9807 }
b38cadfb
NC		 9808 else if (htab->nacl_p)
9809 {
9810 /* Calculate the displacement between the PLT slot and the
9811 common tail that's part of the special initial PLT slot. */
6034aab8 9812 int32_t tail_displacement
b38cadfb
NC		 9813 = ((splt->output_section->vma + splt->output_offset
9814 + ARM_NACL_PLT_TAIL_OFFSET)
9815 - (plt_address + htab->plt_entry_size + 4));
9816 BFD_ASSERT ((tail_displacement & 3) == 0);
9817 tail_displacement >>= 2;
9818
9819 BFD_ASSERT ((tail_displacement & 0xff000000) == 0
9820 || (-tail_displacement & 0xff000000) == 0);
9821
9822 /* Calculate the displacement between the PLT slot and the entry
9823 in the GOT. The offset accounts for the value produced by
9824 adding to pc in the penultimate instruction of the PLT stub. */
6034aab8 9825 got_displacement = (got_address
99059e56 9826 - (plt_address + htab->plt_entry_size));
b38cadfb
NC		 9827
9828 /* NaCl does not support interworking at all. */
9829 BFD_ASSERT (!elf32_arm_plt_needs_thumb_stub_p (info, arm_plt));
9830
9831 put_arm_insn (htab, output_bfd,
9832 elf32_arm_nacl_plt_entry[0]
9833 | arm_movw_immediate (got_displacement),
9834 ptr + 0);
9835 put_arm_insn (htab, output_bfd,
9836 elf32_arm_nacl_plt_entry[1]
9837 | arm_movt_immediate (got_displacement),
9838 ptr + 4);
9839 put_arm_insn (htab, output_bfd,
9840 elf32_arm_nacl_plt_entry[2],
9841 ptr + 8);
9842 put_arm_insn (htab, output_bfd,
9843 elf32_arm_nacl_plt_entry[3]
9844 | (tail_displacement & 0x00ffffff),
9845 ptr + 12);
9846 }
7801f98f
CL		 9847 else if (htab->fdpic_p)
9848 {
59029f57
CL		 9849 const bfd_vma *plt_entry = using_thumb_only(htab)
9850 ? elf32_arm_fdpic_thumb_plt_entry
9851 : elf32_arm_fdpic_plt_entry;
9852
7801f98f
CL		 9853 /* Fill-up Thumb stub if needed. */
9854 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
9855 {
9856 put_thumb_insn (htab, output_bfd,
9857 elf32_arm_plt_thumb_stub[0], ptr - 4);
9858 put_thumb_insn (htab, output_bfd,
9859 elf32_arm_plt_thumb_stub[1], ptr - 2);
9860 }
59029f57
CL		 9861 /* As we are using 32 bit instructions even for the Thumb
9862 version, we have to use 'put_arm_insn' instead of
9863 'put_thumb_insn'. */
9864 put_arm_insn(htab, output_bfd, plt_entry[0], ptr + 0);
9865 put_arm_insn(htab, output_bfd, plt_entry[1], ptr + 4);
9866 put_arm_insn(htab, output_bfd, plt_entry[2], ptr + 8);
9867 put_arm_insn(htab, output_bfd, plt_entry[3], ptr + 12);
7801f98f
CL		 9868 bfd_put_32 (output_bfd, got_offset, ptr + 16);
9869
9870 if (!(info->flags & DF_BIND_NOW))
9871 {
9872 /* funcdesc_value_reloc_offset. */
9873 bfd_put_32 (output_bfd,
9874 htab->root.srelplt->reloc_count * RELOC_SIZE (htab),
9875 ptr + 20);
59029f57
CL		 9876 put_arm_insn(htab, output_bfd, plt_entry[6], ptr + 24);
9877 put_arm_insn(htab, output_bfd, plt_entry[7], ptr + 28);
9878 put_arm_insn(htab, output_bfd, plt_entry[8], ptr + 32);
9879 put_arm_insn(htab, output_bfd, plt_entry[9], ptr + 36);
7801f98f
CL		 9880 }
9881 }
57460bcf
NC		 9882 else if (using_thumb_only (htab))
9883 {
eed94f8f 9884 /* PR ld/16017: Generate thumb only PLT entries. */
469a3493 9885 if (!using_thumb2 (htab))
eed94f8f
NC		 9886 {
9887 /* FIXME: We ought to be able to generate thumb-1 PLT
9888 instructions... */
90b6238f 9889 _bfd_error_handler (_("%pB: warning: thumb-1 mode PLT generation not currently supported"),
eed94f8f
NC		 9890 output_bfd);
9891 return FALSE;
9892 }
57460bcf 9893
eed94f8f
NC		 9894 /* Calculate the displacement between the PLT slot and the entry in
9895 the GOT. The 12-byte offset accounts for the value produced by
9896 adding to pc in the 3rd instruction of the PLT stub. */
9897 got_displacement = got_address - (plt_address + 12);
9898
9899 /* As we are using 32 bit instructions we have to use 'put_arm_insn'
9900 instead of 'put_thumb_insn'. */
9901 put_arm_insn (htab, output_bfd,
9902 elf32_thumb2_plt_entry[0]
9903 | ((got_displacement & 0x000000ff) << 16)
9904 | ((got_displacement & 0x00000700) << 20)
9905 | ((got_displacement & 0x00000800) >> 1)
9906 | ((got_displacement & 0x0000f000) >> 12),
9907 ptr + 0);
9908 put_arm_insn (htab, output_bfd,
9909 elf32_thumb2_plt_entry[1]
9910 | ((got_displacement & 0x00ff0000) )
9911 | ((got_displacement & 0x07000000) << 4)
9912 | ((got_displacement & 0x08000000) >> 17)
9913 | ((got_displacement & 0xf0000000) >> 28),
9914 ptr + 4);
9915 put_arm_insn (htab, output_bfd,
9916 elf32_thumb2_plt_entry[2],
9917 ptr + 8);
9918 put_arm_insn (htab, output_bfd,
9919 elf32_thumb2_plt_entry[3],
9920 ptr + 12);
57460bcf 9921 }
34e77a92
RS		 9922 else
9923 {
9924 /* Calculate the displacement between the PLT slot and the
9925 entry in the GOT. The eight-byte offset accounts for the
9926 value produced by adding to pc in the first instruction
9927 of the PLT stub. */
9928 got_displacement = got_address - (plt_address + 8);
9929
34e77a92
RS		 9930 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
9931 {
9932 put_thumb_insn (htab, output_bfd,
9933 elf32_arm_plt_thumb_stub[0], ptr - 4);
9934 put_thumb_insn (htab, output_bfd,
9935 elf32_arm_plt_thumb_stub[1], ptr - 2);
9936 }
9937
1db37fe6
YG		 9938 if (!elf32_arm_use_long_plt_entry)
9939 {
9940 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
9941
9942 put_arm_insn (htab, output_bfd,
9943 elf32_arm_plt_entry_short[0]
9944 | ((got_displacement & 0x0ff00000) >> 20),
9945 ptr + 0);
9946 put_arm_insn (htab, output_bfd,
9947 elf32_arm_plt_entry_short[1]
9948 | ((got_displacement & 0x000ff000) >> 12),
9949 ptr+ 4);
9950 put_arm_insn (htab, output_bfd,
9951 elf32_arm_plt_entry_short[2]
9952 | (got_displacement & 0x00000fff),
9953 ptr + 8);
34e77a92 9954#ifdef FOUR_WORD_PLT
1db37fe6 9955 bfd_put_32 (output_bfd, elf32_arm_plt_entry_short[3], ptr + 12);
34e77a92 9956#endif
1db37fe6
YG		 9957 }
9958 else
9959 {
9960 put_arm_insn (htab, output_bfd,
9961 elf32_arm_plt_entry_long[0]
9962 | ((got_displacement & 0xf0000000) >> 28),
9963 ptr + 0);
9964 put_arm_insn (htab, output_bfd,
9965 elf32_arm_plt_entry_long[1]
9966 | ((got_displacement & 0x0ff00000) >> 20),
9967 ptr + 4);
9968 put_arm_insn (htab, output_bfd,
9969 elf32_arm_plt_entry_long[2]
9970 | ((got_displacement & 0x000ff000) >> 12),
9971 ptr+ 8);
9972 put_arm_insn (htab, output_bfd,
9973 elf32_arm_plt_entry_long[3]
9974 | (got_displacement & 0x00000fff),
9975 ptr + 12);
9976 }
34e77a92
RS		 9977 }
9978
9979 /* Fill in the entry in the .rel(a).(i)plt section. */
9980 rel.r_offset = got_address;
9981 rel.r_addend = 0;
9982 if (dynindx == -1)
9983 {
9984 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
9985 The dynamic linker or static executable then calls SYM_VALUE
9986 to determine the correct run-time value of the .igot.plt entry. */
9987 rel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
9988 initial_got_entry = sym_value;
9989 }
9990 else
9991 {
7801f98f
CL		 9992 /* For FDPIC we will have to resolve a R_ARM_FUNCDESC_VALUE
9993 used by PLT entry. */
9994 if (htab->fdpic_p)
9995 {
9996 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_FUNCDESC_VALUE);
9997 initial_got_entry = 0;
9998 }
9999 else
10000 {
10001 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_JUMP_SLOT);
10002 initial_got_entry = (splt->output_section->vma
10003 + splt->output_offset);
a7618269
TC		 10004
10005 /* PR ld/16017
10006 When thumb only we need to set the LSB for any address that
10007 will be used with an interworking branch instruction. */
10008 if (using_thumb_only (htab))
10009 initial_got_entry |= 1;
7801f98f 10010 }
34e77a92
RS		 10011 }
10012
10013 /* Fill in the entry in the global offset table. */
10014 bfd_put_32 (output_bfd, initial_got_entry,
10015 sgot->contents + got_offset);
7801f98f
CL		 10016
10017 if (htab->fdpic_p && !(info->flags & DF_BIND_NOW))
10018 {
10019 /* Setup initial funcdesc value. */
10020 /* FIXME: we don't support lazy binding because there is a
10021 race condition between both words getting written and
10022 some other thread attempting to read them. The ARM
10023 architecture does not have an atomic 64 bit load/store
10024 instruction that could be used to prevent it; it is
10025 recommended that threaded FDPIC applications run with the
10026 LD_BIND_NOW environment variable set. */
10027 bfd_put_32(output_bfd, plt_address + 0x18,
10028 sgot->contents + got_offset);
10029 bfd_put_32(output_bfd, -1 /*TODO*/,
10030 sgot->contents + got_offset + 4);
10031 }
34e77a92
RS		 10032 }
10033
aba8c3de
WN		 10034 if (dynindx == -1)
10035 elf32_arm_add_dynreloc (output_bfd, info, srel, &rel);
10036 else
10037 {
7801f98f
CL		 10038 if (htab->fdpic_p)
10039 {
10040 /* For FDPIC we put PLT relocationss into .rel.got when not
10041 lazy binding otherwise we put them in .rel.plt. For now,
10042 we don't support lazy binding so put it in .rel.got. */
10043 if (info->flags & DF_BIND_NOW)
10044 elf32_arm_add_dynreloc(output_bfd, info, htab->root.srelgot, &rel);
10045 else
10046 elf32_arm_add_dynreloc(output_bfd, info, htab->root.srelplt, &rel);
10047 }
10048 else
10049 {
10050 loc = srel->contents + plt_index * RELOC_SIZE (htab);
10051 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10052 }
aba8c3de 10053 }
57460bcf
NC		 10054
10055 return TRUE;
34e77a92
RS		 10056}
10057
eb043451
PB		 10058/* Some relocations map to different relocations depending on the
10059 target. Return the real relocation. */
8029a119 10060
eb043451
PB		 10061static int
10062arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
10063 int r_type)
10064{
10065 switch (r_type)
10066 {
10067 case R_ARM_TARGET1:
10068 if (globals->target1_is_rel)
10069 return R_ARM_REL32;
10070 else
10071 return R_ARM_ABS32;
10072
10073 case R_ARM_TARGET2:
10074 return globals->target2_reloc;
10075
10076 default:
10077 return r_type;
10078 }
10079}
eb043451 10080
ba93b8ac
DJ		 10081/* Return the base VMA address which should be subtracted from real addresses
10082 when resolving @dtpoff relocation.
10083 This is PT_TLS segment p_vaddr. */
10084
10085static bfd_vma
10086dtpoff_base (struct bfd_link_info *info)
10087{
10088 /* If tls_sec is NULL, we should have signalled an error already. */
10089 if (elf_hash_table (info)->tls_sec == NULL)
10090 return 0;
10091 return elf_hash_table (info)->tls_sec->vma;
10092}
10093
10094/* Return the relocation value for @tpoff relocation
10095 if STT_TLS virtual address is ADDRESS. */
10096
10097static bfd_vma
10098tpoff (struct bfd_link_info *info, bfd_vma address)
10099{
10100 struct elf_link_hash_table *htab = elf_hash_table (info);
10101 bfd_vma base;
10102
10103 /* If tls_sec is NULL, we should have signalled an error already. */
10104 if (htab->tls_sec == NULL)
10105 return 0;
10106 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
10107 return address - htab->tls_sec->vma + base;
10108}
10109
00a97672
RS		 10110/* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
10111 VALUE is the relocation value. */
10112
10113static bfd_reloc_status_type
10114elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
10115{
10116 if (value > 0xfff)
10117 return bfd_reloc_overflow;
10118
10119 value |= bfd_get_32 (abfd, data) & 0xfffff000;
10120 bfd_put_32 (abfd, value, data);
10121 return bfd_reloc_ok;
10122}
10123
0855e32b
NS		 10124/* Handle TLS relaxations. Relaxing is possible for symbols that use
10125 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
10126 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
10127
10128 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
10129 is to then call final_link_relocate. Return other values in the
62672b10
NS		 10130 case of error.
10131
10132 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
10133 the pre-relaxed code. It would be nice if the relocs were updated
10134 to match the optimization. */
0855e32b 10135
b38cadfb 10136static bfd_reloc_status_type
0855e32b 10137elf32_arm_tls_relax (struct elf32_arm_link_hash_table *globals,
b38cadfb 10138 bfd *input_bfd, asection *input_sec, bfd_byte *contents,
0855e32b
NS		 10139 Elf_Internal_Rela *rel, unsigned long is_local)
10140{
10141 unsigned long insn;
b38cadfb 10142
0855e32b
NS		 10143 switch (ELF32_R_TYPE (rel->r_info))
10144 {
10145 default:
10146 return bfd_reloc_notsupported;
b38cadfb 10147
0855e32b
NS		 10148 case R_ARM_TLS_GOTDESC:
10149 if (is_local)
10150 insn = 0;
10151 else
10152 {
10153 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
10154 if (insn & 1)
10155 insn -= 5; /* THUMB */
10156 else
10157 insn -= 8; /* ARM */
10158 }
10159 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
10160 return bfd_reloc_continue;
10161
10162 case R_ARM_THM_TLS_DESCSEQ:
10163 /* Thumb insn. */
10164 insn = bfd_get_16 (input_bfd, contents + rel->r_offset);
10165 if ((insn & 0xff78) == 0x4478) /* add rx, pc */
10166 {
10167 if (is_local)
10168 /* nop */
10169 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
10170 }
10171 else if ((insn & 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
10172 {
10173 if (is_local)
10174 /* nop */
10175 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
10176 else
10177 /* ldr rx,[ry] */
10178 bfd_put_16 (input_bfd, insn & 0xf83f, contents + rel->r_offset);
10179 }
10180 else if ((insn & 0xff87) == 0x4780) /* blx rx */
10181 {
10182 if (is_local)
10183 /* nop */
10184 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
10185 else
10186 /* mov r0, rx */
10187 bfd_put_16 (input_bfd, 0x4600 | (insn & 0x78),
10188 contents + rel->r_offset);
10189 }
10190 else
10191 {
10192 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
10193 /* It's a 32 bit instruction, fetch the rest of it for
10194 error generation. */
10195 insn = (insn << 16)
10196 | bfd_get_16 (input_bfd, contents + rel->r_offset + 2);
4eca0228 10197 _bfd_error_handler
695344c0 10198 /* xgettext:c-format */
2dcf00ce 10199 (_("%pB(%pA+%#" PRIx64 "): "
90b6238f
AM		 10200 "unexpected %s instruction '%#lx' in TLS trampoline"),
10201 input_bfd, input_sec, (uint64_t) rel->r_offset,
10202 "Thumb", insn);
0855e32b
NS		 10203 return bfd_reloc_notsupported;
10204 }
10205 break;
b38cadfb 10206
0855e32b
NS		 10207 case R_ARM_TLS_DESCSEQ:
10208 /* arm insn. */
10209 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
10210 if ((insn & 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
10211 {
10212 if (is_local)
10213 /* mov rx, ry */
10214 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xffff),
10215 contents + rel->r_offset);
10216 }
10217 else if ((insn & 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
10218 {
10219 if (is_local)
10220 /* nop */
10221 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
10222 else
10223 /* ldr rx,[ry] */
10224 bfd_put_32 (input_bfd, insn & 0xfffff000,
10225 contents + rel->r_offset);
10226 }
10227 else if ((insn & 0xfffffff0) == 0xe12fff30) /* blx rx */
10228 {
10229 if (is_local)
10230 /* nop */
10231 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
10232 else
10233 /* mov r0, rx */
10234 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xf),
10235 contents + rel->r_offset);
10236 }
10237 else
10238 {
4eca0228 10239 _bfd_error_handler
695344c0 10240 /* xgettext:c-format */
2dcf00ce 10241 (_("%pB(%pA+%#" PRIx64 "): "
90b6238f
AM		 10242 "unexpected %s instruction '%#lx' in TLS trampoline"),
10243 input_bfd, input_sec, (uint64_t) rel->r_offset,
10244 "ARM", insn);
0855e32b
NS		 10245 return bfd_reloc_notsupported;
10246 }
10247 break;
10248
10249 case R_ARM_TLS_CALL:
10250 /* GD->IE relaxation, turn the instruction into 'nop' or
10251 'ldr r0, [pc,r0]' */
10252 insn = is_local ? 0xe1a00000 : 0xe79f0000;
10253 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
10254 break;
b38cadfb 10255
0855e32b 10256 case R_ARM_THM_TLS_CALL:
6a631e86 10257 /* GD->IE relaxation. */
0855e32b
NS		 10258 if (!is_local)
10259 /* add r0,pc; ldr r0, [r0] */
10260 insn = 0x44786800;
60a019a0 10261 else if (using_thumb2 (globals))
0855e32b
NS		 10262 /* nop.w */
10263 insn = 0xf3af8000;
10264 else
10265 /* nop; nop */
10266 insn = 0xbf00bf00;
b38cadfb 10267
0855e32b
NS		 10268 bfd_put_16 (input_bfd, insn >> 16, contents + rel->r_offset);
10269 bfd_put_16 (input_bfd, insn & 0xffff, contents + rel->r_offset + 2);
10270 break;
10271 }
10272 return bfd_reloc_ok;
10273}
10274
4962c51a
MS		 10275/* For a given value of n, calculate the value of G_n as required to
10276 deal with group relocations. We return it in the form of an
10277 encoded constant-and-rotation, together with the final residual. If n is
10278 specified as less than zero, then final_residual is filled with the
10279 input value and no further action is performed. */
10280
10281static bfd_vma
10282calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
10283{
10284 int current_n;
10285 bfd_vma g_n;
10286 bfd_vma encoded_g_n = 0;
10287 bfd_vma residual = value; /* Also known as Y_n. */
10288
10289 for (current_n = 0; current_n <= n; current_n++)
10290 {
10291 int shift;
10292
10293 /* Calculate which part of the value to mask. */
10294 if (residual == 0)
99059e56 10295 shift = 0;
4962c51a 10296 else
99059e56
RM		 10297 {
10298 int msb;
10299
10300 /* Determine the most significant bit in the residual and
10301 align the resulting value to a 2-bit boundary. */
10302 for (msb = 30; msb >= 0; msb -= 2)
10303 if (residual & (3 << msb))
10304 break;
10305
10306 /* The desired shift is now (msb - 6), or zero, whichever
10307 is the greater. */
10308 shift = msb - 6;
10309 if (shift < 0)
10310 shift = 0;
10311 }
4962c51a
MS		 10312
10313 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
10314 g_n = residual & (0xff << shift);
10315 encoded_g_n = (g_n >> shift)
99059e56 10316 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
4962c51a
MS		 10317
10318 /* Calculate the residual for the next time around. */
10319 residual &= ~g_n;
10320 }
10321
10322 *final_residual = residual;
10323
10324 return encoded_g_n;
10325}
10326
10327/* Given an ARM instruction, determine whether it is an ADD or a SUB.
10328 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
906e58ca 10329
4962c51a 10330static int
906e58ca 10331identify_add_or_sub (bfd_vma insn)
4962c51a
MS		 10332{
10333 int opcode = insn & 0x1e00000;
10334
10335 if (opcode == 1 << 23) /* ADD */
10336 return 1;
10337
10338 if (opcode == 1 << 22) /* SUB */
10339 return -1;
10340
10341 return 0;
10342}
10343
252b5132 10344/* Perform a relocation as part of a final link. */
9b485d32 10345
252b5132 10346static bfd_reloc_status_type
07d6d2b8
AM		 10347elf32_arm_final_link_relocate (reloc_howto_type * howto,
10348 bfd * input_bfd,
10349 bfd * output_bfd,
10350 asection * input_section,
10351 bfd_byte * contents,
10352 Elf_Internal_Rela * rel,
10353 bfd_vma value,
10354 struct bfd_link_info * info,
10355 asection * sym_sec,
10356 const char * sym_name,
10357 unsigned char st_type,
10358 enum arm_st_branch_type branch_type,
0945cdfd 10359 struct elf_link_hash_entry * h,
07d6d2b8
AM		 10360 bfd_boolean * unresolved_reloc_p,
10361 char ** error_message)
10362{
10363 unsigned long r_type = howto->type;
10364 unsigned long r_symndx;
10365 bfd_byte * hit_data = contents + rel->r_offset;
10366 bfd_vma * local_got_offsets;
10367 bfd_vma * local_tlsdesc_gotents;
10368 asection * sgot;
10369 asection * splt;
10370 asection * sreloc = NULL;
10371 asection * srelgot;
10372 bfd_vma addend;
10373 bfd_signed_vma signed_addend;
10374 unsigned char dynreloc_st_type;
10375 bfd_vma dynreloc_value;
ba96a88f 10376 struct elf32_arm_link_hash_table * globals;
34e77a92 10377 struct elf32_arm_link_hash_entry *eh;
07d6d2b8
AM		 10378 union gotplt_union *root_plt;
10379 struct arm_plt_info *arm_plt;
10380 bfd_vma plt_offset;
10381 bfd_vma gotplt_offset;
10382 bfd_boolean has_iplt_entry;
10383 bfd_boolean resolved_to_zero;
f21f3fe0 10384
9c504268 10385 globals = elf32_arm_hash_table (info);
4dfe6ac6
NC		 10386 if (globals == NULL)
10387 return bfd_reloc_notsupported;
9c504268 10388
0ffa91dd 10389 BFD_ASSERT (is_arm_elf (input_bfd));
47aeb64c 10390 BFD_ASSERT (howto != NULL);
0ffa91dd
NC		 10391
10392 /* Some relocation types map to different relocations depending on the
9c504268 10393 target. We pick the right one here. */
eb043451 10394 r_type = arm_real_reloc_type (globals, r_type);
0855e32b
NS		 10395
10396 /* It is possible to have linker relaxations on some TLS access
10397 models. Update our information here. */
10398 r_type = elf32_arm_tls_transition (info, r_type, h);
10399
eb043451
PB		 10400 if (r_type != howto->type)
10401 howto = elf32_arm_howto_from_type (r_type);
9c504268 10402
34e77a92 10403 eh = (struct elf32_arm_link_hash_entry *) h;
362d30a1 10404 sgot = globals->root.sgot;
252b5132 10405 local_got_offsets = elf_local_got_offsets (input_bfd);
0855e32b
NS		 10406 local_tlsdesc_gotents = elf32_arm_local_tlsdesc_gotent (input_bfd);
10407
34e77a92
RS		 10408 if (globals->root.dynamic_sections_created)
10409 srelgot = globals->root.srelgot;
10410 else
10411 srelgot = NULL;
10412
252b5132
RH		 10413 r_symndx = ELF32_R_SYM (rel->r_info);
10414
4e7fd91e 10415 if (globals->use_rel)
ba96a88f 10416 {
4e7fd91e
PB		 10417 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
10418
10419 if (addend & ((howto->src_mask + 1) >> 1))
10420 {
10421 signed_addend = -1;
10422 signed_addend &= ~ howto->src_mask;
10423 signed_addend |= addend;
10424 }
10425 else
10426 signed_addend = addend;
ba96a88f
NC		 10427 }
10428 else
4e7fd91e 10429 addend = signed_addend = rel->r_addend;
f21f3fe0 10430
39f21624
NC		 10431 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
10432 are resolving a function call relocation. */
10433 if (using_thumb_only (globals)
10434 && (r_type == R_ARM_THM_CALL
10435 || r_type == R_ARM_THM_JUMP24)
10436 && branch_type == ST_BRANCH_TO_ARM)
10437 branch_type = ST_BRANCH_TO_THUMB;
10438
34e77a92
RS		 10439 /* Record the symbol information that should be used in dynamic
10440 relocations. */
10441 dynreloc_st_type = st_type;
10442 dynreloc_value = value;
10443 if (branch_type == ST_BRANCH_TO_THUMB)
10444 dynreloc_value |= 1;
10445
10446 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
10447 VALUE appropriately for relocations that we resolve at link time. */
10448 has_iplt_entry = FALSE;
4ba2ef8f
TP		 10449 if (elf32_arm_get_plt_info (input_bfd, globals, eh, r_symndx, &root_plt,
10450 &arm_plt)
34e77a92
RS		 10451 && root_plt->offset != (bfd_vma) -1)
10452 {
10453 plt_offset = root_plt->offset;
10454 gotplt_offset = arm_plt->got_offset;
10455
10456 if (h == NULL || eh->is_iplt)
10457 {
10458 has_iplt_entry = TRUE;
10459 splt = globals->root.iplt;
10460
10461 /* Populate .iplt entries here, because not all of them will
10462 be seen by finish_dynamic_symbol. The lower bit is set if
10463 we have already populated the entry. */
10464 if (plt_offset & 1)
10465 plt_offset--;
10466 else
10467 {
57460bcf
NC		 10468 if (elf32_arm_populate_plt_entry (output_bfd, info, root_plt, arm_plt,
10469 -1, dynreloc_value))
10470 root_plt->offset |= 1;
10471 else
10472 return bfd_reloc_notsupported;
34e77a92
RS		 10473 }
10474
10475 /* Static relocations always resolve to the .iplt entry. */
10476 st_type = STT_FUNC;
10477 value = (splt->output_section->vma
10478 + splt->output_offset
10479 + plt_offset);
10480 branch_type = ST_BRANCH_TO_ARM;
10481
10482 /* If there are non-call relocations that resolve to the .iplt
10483 entry, then all dynamic ones must too. */
10484 if (arm_plt->noncall_refcount != 0)
10485 {
10486 dynreloc_st_type = st_type;
10487 dynreloc_value = value;
10488 }
10489 }
10490 else
10491 /* We populate the .plt entry in finish_dynamic_symbol. */
10492 splt = globals->root.splt;
10493 }
10494 else
10495 {
10496 splt = NULL;
10497 plt_offset = (bfd_vma) -1;
10498 gotplt_offset = (bfd_vma) -1;
10499 }
10500
95b03e4a
L		 10501 resolved_to_zero = (h != NULL
10502 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
10503
252b5132
RH		 10504 switch (r_type)
10505 {
10506 case R_ARM_NONE:
28a094c2
DJ		 10507 /* We don't need to find a value for this symbol. It's just a
10508 marker. */
10509 *unresolved_reloc_p = FALSE;
252b5132
RH		 10510 return bfd_reloc_ok;
10511
00a97672
RS		 10512 case R_ARM_ABS12:
10513 if (!globals->vxworks_p)
10514 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
1a0670f3 10515 /* Fall through. */
00a97672 10516
252b5132
RH		 10517 case R_ARM_PC24:
10518 case R_ARM_ABS32:
bb224fc3 10519 case R_ARM_ABS32_NOI:
252b5132 10520 case R_ARM_REL32:
bb224fc3 10521 case R_ARM_REL32_NOI:
5b5bb741
PB		 10522 case R_ARM_CALL:
10523 case R_ARM_JUMP24:
dfc5f959 10524 case R_ARM_XPC25:
eb043451 10525 case R_ARM_PREL31:
7359ea65 10526 case R_ARM_PLT32:
7359ea65
DJ		 10527 /* Handle relocations which should use the PLT entry. ABS32/REL32
10528 will use the symbol's value, which may point to a PLT entry, but we
10529 don't need to handle that here. If we created a PLT entry, all
5fa9e92f
CL		 10530 branches in this object should go to it, except if the PLT is too
10531 far away, in which case a long branch stub should be inserted. */
bb224fc3 10532 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
99059e56 10533 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI
155d87d7
CL		 10534 && r_type != R_ARM_CALL
10535 && r_type != R_ARM_JUMP24
10536 && r_type != R_ARM_PLT32)
34e77a92 10537 && plt_offset != (bfd_vma) -1)
7359ea65 10538 {
34e77a92
RS		 10539 /* If we've created a .plt section, and assigned a PLT entry
10540 to this function, it must either be a STT_GNU_IFUNC reference
10541 or not be known to bind locally. In other cases, we should
10542 have cleared the PLT entry by now. */
10543 BFD_ASSERT (has_iplt_entry || !SYMBOL_CALLS_LOCAL (info, h));
7359ea65
DJ		 10544
10545 value = (splt->output_section->vma
10546 + splt->output_offset
34e77a92 10547 + plt_offset);
0945cdfd 10548 *unresolved_reloc_p = FALSE;
7359ea65
DJ		 10549 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10550 contents, rel->r_offset, value,
00a97672 10551 rel->r_addend);
7359ea65
DJ		 10552 }
10553
67687978
PB		 10554 /* When generating a shared object or relocatable executable, these
10555 relocations are copied into the output file to be resolved at
10556 run time. */
0e1862bb 10557 if ((bfd_link_pic (info)
e8b09b87
CL		 10558 || globals->root.is_relocatable_executable
10559 || globals->fdpic_p)
7359ea65 10560 && (input_section->flags & SEC_ALLOC)
4dfe6ac6 10561 && !(globals->vxworks_p
3348747a
NS		 10562 && strcmp (input_section->output_section->name,
10563 ".tls_vars") == 0)
bb224fc3 10564 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
ee06dc07 10565 || !SYMBOL_CALLS_LOCAL (info, h))
ca6b5f82
AM		 10566 && !(input_bfd == globals->stub_bfd
10567 && strstr (input_section->name, STUB_SUFFIX))
7359ea65 10568 && (h == NULL
95b03e4a
L		 10569 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10570 && !resolved_to_zero)
7359ea65
DJ		 10571 || h->root.type != bfd_link_hash_undefweak)
10572 && r_type != R_ARM_PC24
5b5bb741
PB		 10573 && r_type != R_ARM_CALL
10574 && r_type != R_ARM_JUMP24
ee06dc07 10575 && r_type != R_ARM_PREL31
7359ea65 10576 && r_type != R_ARM_PLT32)
252b5132 10577 {
947216bf 10578 Elf_Internal_Rela outrel;
b34976b6 10579 bfd_boolean skip, relocate;
e8b09b87 10580 int isrofixup = 0;
f21f3fe0 10581
52db4ec2
JW		 10582 if ((r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
10583 && !h->def_regular)
10584 {
10585 char *v = _("shared object");
10586
0e1862bb 10587 if (bfd_link_executable (info))
52db4ec2
JW		 10588 v = _("PIE executable");
10589
4eca0228 10590 _bfd_error_handler
871b3ab2 10591 (_("%pB: relocation %s against external or undefined symbol `%s'"
52db4ec2
JW		 10592 " can not be used when making a %s; recompile with -fPIC"), input_bfd,
10593 elf32_arm_howto_table_1[r_type].name, h->root.root.string, v);
10594 return bfd_reloc_notsupported;
10595 }
10596
0945cdfd
DJ		 10597 *unresolved_reloc_p = FALSE;
10598
34e77a92 10599 if (sreloc == NULL && globals->root.dynamic_sections_created)
252b5132 10600 {
83bac4b0
NC		 10601 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
10602 ! globals->use_rel);
f21f3fe0 10603
83bac4b0 10604 if (sreloc == NULL)
252b5132 10605 return bfd_reloc_notsupported;
252b5132 10606 }
f21f3fe0 10607
b34976b6
AM		 10608 skip = FALSE;
10609 relocate = FALSE;
f21f3fe0 10610
00a97672 10611 outrel.r_addend = addend;
c629eae0
JJ		 10612 outrel.r_offset =
10613 _bfd_elf_section_offset (output_bfd, info, input_section,
10614 rel->r_offset);
10615 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 10616 skip = TRUE;
0bb2d96a 10617 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 10618 skip = TRUE, relocate = TRUE;
252b5132
RH		 10619 outrel.r_offset += (input_section->output_section->vma
10620 + input_section->output_offset);
f21f3fe0 10621
252b5132 10622 if (skip)
0bb2d96a 10623 memset (&outrel, 0, sizeof outrel);
5e681ec4
PB		 10624 else if (h != NULL
10625 && h->dynindx != -1
0e1862bb 10626 && (!bfd_link_pic (info)
1dcb9720
JW		 10627 || !(bfd_link_pie (info)
10628 || SYMBOLIC_BIND (info, h))
f5385ebf 10629 || !h->def_regular))
5e681ec4 10630 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 10631 else
10632 {
a16385dc
MM		 10633 int symbol;
10634
5e681ec4 10635 /* This symbol is local, or marked to become local. */
e8b09b87
CL		 10636 BFD_ASSERT (r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI
10637 || (globals->fdpic_p && !bfd_link_pic(info)));
a16385dc 10638 if (globals->symbian_p)
6366ff1e 10639 {
74541ad4
AM		 10640 asection *osec;
10641
6366ff1e
MM		 10642 /* On Symbian OS, the data segment and text segement
10643 can be relocated independently. Therefore, we
10644 must indicate the segment to which this
10645 relocation is relative. The BPABI allows us to
10646 use any symbol in the right segment; we just use
10647 the section symbol as it is convenient. (We
10648 cannot use the symbol given by "h" directly as it
74541ad4
AM		 10649 will not appear in the dynamic symbol table.)
10650
10651 Note that the dynamic linker ignores the section
10652 symbol value, so we don't subtract osec->vma
10653 from the emitted reloc addend. */
10dbd1f3 10654 if (sym_sec)
74541ad4 10655 osec = sym_sec->output_section;
10dbd1f3 10656 else
74541ad4
AM		 10657 osec = input_section->output_section;
10658 symbol = elf_section_data (osec)->dynindx;
10659 if (symbol == 0)
10660 {
10661 struct elf_link_hash_table *htab = elf_hash_table (info);
10662
10663 if ((osec->flags & SEC_READONLY) == 0
10664 && htab->data_index_section != NULL)
10665 osec = htab->data_index_section;
10666 else
10667 osec = htab->text_index_section;
10668 symbol = elf_section_data (osec)->dynindx;
10669 }
6366ff1e
MM		 10670 BFD_ASSERT (symbol != 0);
10671 }
a16385dc
MM		 10672 else
10673 /* On SVR4-ish systems, the dynamic loader cannot
10674 relocate the text and data segments independently,
10675 so the symbol does not matter. */
10676 symbol = 0;
34e77a92
RS		 10677 if (dynreloc_st_type == STT_GNU_IFUNC)
10678 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
10679 to the .iplt entry. Instead, every non-call reference
10680 must use an R_ARM_IRELATIVE relocation to obtain the
10681 correct run-time address. */
10682 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_IRELATIVE);
e8b09b87
CL		 10683 else if (globals->fdpic_p && !bfd_link_pic(info))
10684 isrofixup = 1;
34e77a92
RS		 10685 else
10686 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
00a97672
RS		 10687 if (globals->use_rel)
10688 relocate = TRUE;
10689 else
34e77a92 10690 outrel.r_addend += dynreloc_value;
252b5132 10691 }
f21f3fe0 10692
e8b09b87
CL		 10693 if (isrofixup)
10694 arm_elf_add_rofixup(output_bfd, globals->srofixup, outrel.r_offset);
10695 else
10696 elf32_arm_add_dynreloc (output_bfd, info, sreloc, &outrel);
9a5aca8c 10697
f21f3fe0 10698 /* If this reloc is against an external symbol, we do not want to
252b5132 10699 fiddle with the addend. Otherwise, we need to include the symbol
9b485d32 10700 value so that it becomes an addend for the dynamic reloc. */
252b5132
RH		 10701 if (! relocate)
10702 return bfd_reloc_ok;
9a5aca8c 10703
f21f3fe0 10704 return _bfd_final_link_relocate (howto, input_bfd, input_section,
34e77a92
RS		 10705 contents, rel->r_offset,
10706 dynreloc_value, (bfd_vma) 0);
252b5132
RH		 10707 }
10708 else switch (r_type)
10709 {
00a97672
RS		 10710 case R_ARM_ABS12:
10711 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
10712
dfc5f959 10713 case R_ARM_XPC25: /* Arm BLX instruction. */
5b5bb741
PB		 10714 case R_ARM_CALL:
10715 case R_ARM_JUMP24:
8029a119 10716 case R_ARM_PC24: /* Arm B/BL instruction. */
7359ea65 10717 case R_ARM_PLT32:
906e58ca 10718 {
906e58ca
NC		 10719 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
10720
dfc5f959 10721 if (r_type == R_ARM_XPC25)
252b5132 10722 {
dfc5f959
NC		 10723 /* Check for Arm calling Arm function. */
10724 /* FIXME: Should we translate the instruction into a BL
10725 instruction instead ? */
35fc36a8 10726 if (branch_type != ST_BRANCH_TO_THUMB)
4eca0228 10727 _bfd_error_handler
90b6238f
AM		 10728 (_("\%pB: warning: %s BLX instruction targets"
10729 " %s function '%s'"),
10730 input_bfd, "ARM",
10731 "ARM", h ? h->root.root.string : "(local)");
dfc5f959 10732 }
155d87d7 10733 else if (r_type == R_ARM_PC24)
dfc5f959
NC		 10734 {
10735 /* Check for Arm calling Thumb function. */
35fc36a8 10736 if (branch_type == ST_BRANCH_TO_THUMB)
dfc5f959 10737 {
f2a9dd69
DJ		 10738 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
10739 output_bfd, input_section,
10740 hit_data, sym_sec, rel->r_offset,
10741 signed_addend, value,
10742 error_message))
10743 return bfd_reloc_ok;
10744 else
10745 return bfd_reloc_dangerous;
dfc5f959 10746 }
252b5132 10747 }
ba96a88f 10748
906e58ca 10749 /* Check if a stub has to be inserted because the
8029a119 10750 destination is too far or we are changing mode. */
155d87d7
CL		 10751 if ( r_type == R_ARM_CALL
10752 || r_type == R_ARM_JUMP24
10753 || r_type == R_ARM_PLT32)
906e58ca 10754 {
fe33d2fa
CL		 10755 enum elf32_arm_stub_type stub_type = arm_stub_none;
10756 struct elf32_arm_link_hash_entry *hash;
10757
10758 hash = (struct elf32_arm_link_hash_entry *) h;
10759 stub_type = arm_type_of_stub (info, input_section, rel,
34e77a92
RS		 10760 st_type, &branch_type,
10761 hash, value, sym_sec,
fe33d2fa 10762 input_bfd, sym_name);
5fa9e92f 10763
fe33d2fa 10764 if (stub_type != arm_stub_none)
906e58ca
NC		 10765 {
10766 /* The target is out of reach, so redirect the
10767 branch to the local stub for this function. */
906e58ca
NC		 10768 stub_entry = elf32_arm_get_stub_entry (input_section,
10769 sym_sec, h,
fe33d2fa
CL		 10770 rel, globals,
10771 stub_type);
9cd3e4e5
NC		 10772 {
10773 if (stub_entry != NULL)
10774 value = (stub_entry->stub_offset
10775 + stub_entry->stub_sec->output_offset
10776 + stub_entry->stub_sec->output_section->vma);
10777
10778 if (plt_offset != (bfd_vma) -1)
10779 *unresolved_reloc_p = FALSE;
10780 }
906e58ca 10781 }
fe33d2fa
CL		 10782 else
10783 {
10784 /* If the call goes through a PLT entry, make sure to
10785 check distance to the right destination address. */
34e77a92 10786 if (plt_offset != (bfd_vma) -1)
fe33d2fa
CL		 10787 {
10788 value = (splt->output_section->vma
10789 + splt->output_offset
34e77a92 10790 + plt_offset);
fe33d2fa
CL		 10791 *unresolved_reloc_p = FALSE;
10792 /* The PLT entry is in ARM mode, regardless of the
10793 target function. */
35fc36a8 10794 branch_type = ST_BRANCH_TO_ARM;
fe33d2fa
CL		 10795 }
10796 }
906e58ca
NC		 10797 }
10798
dea514f5
PB		 10799 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
10800 where:
10801 S is the address of the symbol in the relocation.
10802 P is address of the instruction being relocated.
10803 A is the addend (extracted from the instruction) in bytes.
10804
10805 S is held in 'value'.
10806 P is the base address of the section containing the
10807 instruction plus the offset of the reloc into that
10808 section, ie:
10809 (input_section->output_section->vma +
10810 input_section->output_offset +
10811 rel->r_offset).
10812 A is the addend, converted into bytes, ie:
10813 (signed_addend * 4)
10814
10815 Note: None of these operations have knowledge of the pipeline
10816 size of the processor, thus it is up to the assembler to
10817 encode this information into the addend. */
10818 value -= (input_section->output_section->vma
10819 + input_section->output_offset);
10820 value -= rel->r_offset;
4e7fd91e
PB		 10821 if (globals->use_rel)
10822 value += (signed_addend << howto->size);
10823 else
10824 /* RELA addends do not have to be adjusted by howto->size. */
10825 value += signed_addend;
23080146 10826
dcb5e6e6
NC		 10827 signed_addend = value;
10828 signed_addend >>= howto->rightshift;
9a5aca8c 10829
5ab79981 10830 /* A branch to an undefined weak symbol is turned into a jump to
ffcb4889 10831 the next instruction unless a PLT entry will be created.
77b4f08f 10832 Do the same for local undefined symbols (but not for STN_UNDEF).
cd1dac3d
DG		 10833 The jump to the next instruction is optimized as a NOP depending
10834 on the architecture. */
ffcb4889 10835 if (h ? (h->root.type == bfd_link_hash_undefweak
34e77a92 10836 && plt_offset == (bfd_vma) -1)
77b4f08f 10837 : r_symndx != STN_UNDEF && bfd_is_und_section (sym_sec))
5ab79981 10838 {
cd1dac3d
DG		 10839 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000);
10840
10841 if (arch_has_arm_nop (globals))
10842 value |= 0x0320f000;
10843 else
10844 value |= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
5ab79981
PB		 10845 }
10846 else
59f2c4e7 10847 {
9b485d32 10848 /* Perform a signed range check. */
dcb5e6e6 10849 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
59f2c4e7
NC		 10850 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
10851 return bfd_reloc_overflow;
9a5aca8c 10852
5ab79981 10853 addend = (value & 2);
39b41c9c 10854
5ab79981
PB		 10855 value = (signed_addend & howto->dst_mask)
10856 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
39b41c9c 10857
5ab79981
PB		 10858 if (r_type == R_ARM_CALL)
10859 {
155d87d7 10860 /* Set the H bit in the BLX instruction. */
35fc36a8 10861 if (branch_type == ST_BRANCH_TO_THUMB)
155d87d7
CL		 10862 {
10863 if (addend)
10864 value |= (1 << 24);
10865 else
10866 value &= ~(bfd_vma)(1 << 24);
10867 }
10868
5ab79981 10869 /* Select the correct instruction (BL or BLX). */
906e58ca 10870 /* Only if we are not handling a BL to a stub. In this
8029a119 10871 case, mode switching is performed by the stub. */
35fc36a8 10872 if (branch_type == ST_BRANCH_TO_THUMB && !stub_entry)
5ab79981 10873 value |= (1 << 28);
63e1a0fc 10874 else if (stub_entry || branch_type != ST_BRANCH_UNKNOWN)
5ab79981
PB		 10875 {
10876 value &= ~(bfd_vma)(1 << 28);
10877 value |= (1 << 24);
10878 }
39b41c9c
PB		 10879 }
10880 }
906e58ca 10881 }
252b5132 10882 break;
f21f3fe0 10883
252b5132
RH		 10884 case R_ARM_ABS32:
10885 value += addend;
35fc36a8 10886 if (branch_type == ST_BRANCH_TO_THUMB)
252b5132
RH		 10887 value |= 1;
10888 break;
f21f3fe0 10889
bb224fc3
MS		 10890 case R_ARM_ABS32_NOI:
10891 value += addend;
10892 break;
10893
252b5132 10894 case R_ARM_REL32:
a8bc6c78 10895 value += addend;
35fc36a8 10896 if (branch_type == ST_BRANCH_TO_THUMB)
a8bc6c78 10897 value |= 1;
252b5132 10898 value -= (input_section->output_section->vma
62efb346 10899 + input_section->output_offset + rel->r_offset);
252b5132 10900 break;
eb043451 10901
bb224fc3
MS		 10902 case R_ARM_REL32_NOI:
10903 value += addend;
10904 value -= (input_section->output_section->vma
10905 + input_section->output_offset + rel->r_offset);
10906 break;
10907
eb043451
PB		 10908 case R_ARM_PREL31:
10909 value -= (input_section->output_section->vma
10910 + input_section->output_offset + rel->r_offset);
10911 value += signed_addend;
10912 if (! h || h->root.type != bfd_link_hash_undefweak)
10913 {
8029a119 10914 /* Check for overflow. */
eb043451
PB		 10915 if ((value ^ (value >> 1)) & (1 << 30))
10916 return bfd_reloc_overflow;
10917 }
10918 value &= 0x7fffffff;
10919 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
35fc36a8 10920 if (branch_type == ST_BRANCH_TO_THUMB)
eb043451
PB		 10921 value |= 1;
10922 break;
252b5132 10923 }
f21f3fe0 10924
252b5132
RH		 10925 bfd_put_32 (input_bfd, value, hit_data);
10926 return bfd_reloc_ok;
10927
10928 case R_ARM_ABS8:
fd0fd00c
MJ		 10929 /* PR 16202: Refectch the addend using the correct size. */
10930 if (globals->use_rel)
10931 addend = bfd_get_8 (input_bfd, hit_data);
252b5132 10932 value += addend;
4e67d4ca
DG		 10933
10934 /* There is no way to tell whether the user intended to use a signed or
10935 unsigned addend. When checking for overflow we accept either,
10936 as specified by the AAELF. */
10937 if ((long) value > 0xff || (long) value < -0x80)
252b5132
RH		 10938 return bfd_reloc_overflow;
10939
10940 bfd_put_8 (input_bfd, value, hit_data);
10941 return bfd_reloc_ok;
10942
10943 case R_ARM_ABS16:
fd0fd00c
MJ		 10944 /* PR 16202: Refectch the addend using the correct size. */
10945 if (globals->use_rel)
10946 addend = bfd_get_16 (input_bfd, hit_data);
252b5132
RH		 10947 value += addend;
10948
4e67d4ca
DG		 10949 /* See comment for R_ARM_ABS8. */
10950 if ((long) value > 0xffff || (long) value < -0x8000)
252b5132
RH		 10951 return bfd_reloc_overflow;
10952
10953 bfd_put_16 (input_bfd, value, hit_data);
10954 return bfd_reloc_ok;
10955
252b5132 10956 case R_ARM_THM_ABS5:
9b485d32 10957 /* Support ldr and str instructions for the thumb. */
4e7fd91e
PB		 10958 if (globals->use_rel)
10959 {
10960 /* Need to refetch addend. */
10961 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
10962 /* ??? Need to determine shift amount from operand size. */
10963 addend >>= howto->rightshift;
10964 }
252b5132
RH		 10965 value += addend;
10966
10967 /* ??? Isn't value unsigned? */
10968 if ((long) value > 0x1f || (long) value < -0x10)
10969 return bfd_reloc_overflow;
10970
10971 /* ??? Value needs to be properly shifted into place first. */
10972 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
10973 bfd_put_16 (input_bfd, value, hit_data);
10974 return bfd_reloc_ok;
10975
2cab6cc3
MS		 10976 case R_ARM_THM_ALU_PREL_11_0:
10977 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
10978 {
10979 bfd_vma insn;
10980 bfd_signed_vma relocation;
10981
10982 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
99059e56 10983 | bfd_get_16 (input_bfd, hit_data + 2);
2cab6cc3 10984
99059e56
RM		 10985 if (globals->use_rel)
10986 {
10987 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
10988 | ((insn & (1 << 26)) >> 15);
10989 if (insn & 0xf00000)
10990 signed_addend = -signed_addend;
10991 }
2cab6cc3
MS		 10992
10993 relocation = value + signed_addend;
79f08007 10994 relocation -= Pa (input_section->output_section->vma
99059e56
RM		 10995 + input_section->output_offset
10996 + rel->r_offset);
2cab6cc3 10997
8c65b54f
CS		 10998 /* PR 21523: Use an absolute value. The user of this reloc will
10999 have already selected an ADD or SUB insn appropriately. */
453f8e1e 11000 value = llabs (relocation);
2cab6cc3 11001
99059e56
RM		 11002 if (value >= 0x1000)
11003 return bfd_reloc_overflow;
2cab6cc3 11004
e645cf40
AG		 11005 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
11006 if (branch_type == ST_BRANCH_TO_THUMB)
11007 value |= 1;
11008
2cab6cc3 11009 insn = (insn & 0xfb0f8f00) | (value & 0xff)
99059e56
RM		 11010 | ((value & 0x700) << 4)
11011 | ((value & 0x800) << 15);
11012 if (relocation < 0)
11013 insn |= 0xa00000;
2cab6cc3
MS		 11014
11015 bfd_put_16 (input_bfd, insn >> 16, hit_data);
11016 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
11017
99059e56 11018 return bfd_reloc_ok;
2cab6cc3
MS		 11019 }
11020
e1ec24c6
NC		 11021 case R_ARM_THM_PC8:
11022 /* PR 10073: This reloc is not generated by the GNU toolchain,
11023 but it is supported for compatibility with third party libraries
11024 generated by other compilers, specifically the ARM/IAR. */
11025 {
11026 bfd_vma insn;
11027 bfd_signed_vma relocation;
11028
11029 insn = bfd_get_16 (input_bfd, hit_data);
11030
99059e56 11031 if (globals->use_rel)
79f08007 11032 addend = ((((insn & 0x00ff) << 2) + 4) & 0x3ff) -4;
e1ec24c6
NC		 11033
11034 relocation = value + addend;
79f08007 11035 relocation -= Pa (input_section->output_section->vma
99059e56
RM		 11036 + input_section->output_offset
11037 + rel->r_offset);
e1ec24c6 11038
b6518b38 11039 value = relocation;
e1ec24c6
NC		 11040
11041 /* We do not check for overflow of this reloc. Although strictly
11042 speaking this is incorrect, it appears to be necessary in order
11043 to work with IAR generated relocs. Since GCC and GAS do not
11044 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
11045 a problem for them. */
11046 value &= 0x3fc;
11047
11048 insn = (insn & 0xff00) | (value >> 2);
11049
11050 bfd_put_16 (input_bfd, insn, hit_data);
11051
99059e56 11052 return bfd_reloc_ok;
e1ec24c6
NC		 11053 }
11054
2cab6cc3
MS		 11055 case R_ARM_THM_PC12:
11056 /* Corresponds to: ldr.w reg, [pc, #offset]. */
11057 {
11058 bfd_vma insn;
11059 bfd_signed_vma relocation;
11060
11061 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
99059e56 11062 | bfd_get_16 (input_bfd, hit_data + 2);
2cab6cc3 11063
99059e56
RM		 11064 if (globals->use_rel)
11065 {
11066 signed_addend = insn & 0xfff;
11067 if (!(insn & (1 << 23)))
11068 signed_addend = -signed_addend;
11069 }
2cab6cc3
MS		 11070
11071 relocation = value + signed_addend;
79f08007 11072 relocation -= Pa (input_section->output_section->vma
99059e56
RM		 11073 + input_section->output_offset
11074 + rel->r_offset);
2cab6cc3 11075
b6518b38 11076 value = relocation;
2cab6cc3 11077
99059e56
RM		 11078 if (value >= 0x1000)
11079 return bfd_reloc_overflow;
2cab6cc3
MS		 11080
11081 insn = (insn & 0xff7ff000) | value;
99059e56
RM		 11082 if (relocation >= 0)
11083 insn |= (1 << 23);
2cab6cc3
MS		 11084
11085 bfd_put_16 (input_bfd, insn >> 16, hit_data);
11086 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
11087
99059e56 11088 return bfd_reloc_ok;
2cab6cc3
MS		 11089 }
11090
dfc5f959 11091 case R_ARM_THM_XPC22:
c19d1205 11092 case R_ARM_THM_CALL:
bd97cb95 11093 case R_ARM_THM_JUMP24:
dfc5f959 11094 /* Thumb BL (branch long instruction). */
252b5132 11095 {
b34976b6 11096 bfd_vma relocation;
99059e56 11097 bfd_vma reloc_sign;
b34976b6
AM		 11098 bfd_boolean overflow = FALSE;
11099 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
11100 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
e95de063
MS		 11101 bfd_signed_vma reloc_signed_max;
11102 bfd_signed_vma reloc_signed_min;
b34976b6 11103 bfd_vma check;
252b5132 11104 bfd_signed_vma signed_check;
e95de063 11105 int bitsize;
cd1dac3d 11106 const int thumb2 = using_thumb2 (globals);
5e866f5a 11107 const int thumb2_bl = using_thumb2_bl (globals);
252b5132 11108
5ab79981 11109 /* A branch to an undefined weak symbol is turned into a jump to
cd1dac3d
DG		 11110 the next instruction unless a PLT entry will be created.
11111 The jump to the next instruction is optimized as a NOP.W for
11112 Thumb-2 enabled architectures. */
19540007 11113 if (h && h->root.type == bfd_link_hash_undefweak
34e77a92 11114 && plt_offset == (bfd_vma) -1)
5ab79981 11115 {
60a019a0 11116 if (thumb2)
cd1dac3d
DG		 11117 {
11118 bfd_put_16 (input_bfd, 0xf3af, hit_data);
11119 bfd_put_16 (input_bfd, 0x8000, hit_data + 2);
11120 }
11121 else
11122 {
11123 bfd_put_16 (input_bfd, 0xe000, hit_data);
11124 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
11125 }
5ab79981
PB		 11126 return bfd_reloc_ok;
11127 }
11128
e95de063 11129 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
99059e56 11130 with Thumb-1) involving the J1 and J2 bits. */
4e7fd91e
PB		 11131 if (globals->use_rel)
11132 {
99059e56
RM		 11133 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
11134 bfd_vma upper = upper_insn & 0x3ff;
11135 bfd_vma lower = lower_insn & 0x7ff;
e95de063
MS		 11136 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
11137 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
99059e56
RM		 11138 bfd_vma i1 = j1 ^ s ? 0 : 1;
11139 bfd_vma i2 = j2 ^ s ? 0 : 1;
e95de063 11140
99059e56
RM		 11141 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
11142 /* Sign extend. */
11143 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
e95de063 11144
4e7fd91e
PB		 11145 signed_addend = addend;
11146 }
cb1afa5c 11147
dfc5f959
NC		 11148 if (r_type == R_ARM_THM_XPC22)
11149 {
11150 /* Check for Thumb to Thumb call. */
11151 /* FIXME: Should we translate the instruction into a BL
11152 instruction instead ? */
35fc36a8 11153 if (branch_type == ST_BRANCH_TO_THUMB)
4eca0228 11154 _bfd_error_handler
90b6238f
AM		 11155 (_("%pB: warning: %s BLX instruction targets"
11156 " %s function '%s'"),
11157 input_bfd, "Thumb",
11158 "Thumb", h ? h->root.root.string : "(local)");
dfc5f959
NC		 11159 }
11160 else
252b5132 11161 {
dfc5f959
NC		 11162 /* If it is not a call to Thumb, assume call to Arm.
11163 If it is a call relative to a section name, then it is not a
b7693d02
DJ		 11164 function call at all, but rather a long jump. Calls through
11165 the PLT do not require stubs. */
34e77a92 11166 if (branch_type == ST_BRANCH_TO_ARM && plt_offset == (bfd_vma) -1)
dfc5f959 11167 {
bd97cb95 11168 if (globals->use_blx && r_type == R_ARM_THM_CALL)
39b41c9c
PB		 11169 {
11170 /* Convert BL to BLX. */
11171 lower_insn = (lower_insn & ~0x1000) | 0x0800;
11172 }
155d87d7
CL		 11173 else if (( r_type != R_ARM_THM_CALL)
11174 && (r_type != R_ARM_THM_JUMP24))
8029a119
NC		 11175 {
11176 if (elf32_thumb_to_arm_stub
11177 (info, sym_name, input_bfd, output_bfd, input_section,
11178 hit_data, sym_sec, rel->r_offset, signed_addend, value,
11179 error_message))
11180 return bfd_reloc_ok;
11181 else
11182 return bfd_reloc_dangerous;
11183 }
da5938a2 11184 }
35fc36a8
RS		 11185 else if (branch_type == ST_BRANCH_TO_THUMB
11186 && globals->use_blx
bd97cb95 11187 && r_type == R_ARM_THM_CALL)
39b41c9c
PB		 11188 {
11189 /* Make sure this is a BL. */
11190 lower_insn |= 0x1800;
11191 }
252b5132 11192 }
f21f3fe0 11193
fe33d2fa 11194 enum elf32_arm_stub_type stub_type = arm_stub_none;
155d87d7 11195 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24)
906e58ca
NC		 11196 {
11197 /* Check if a stub has to be inserted because the destination
8029a119 11198 is too far. */
fe33d2fa
CL		 11199 struct elf32_arm_stub_hash_entry *stub_entry;
11200 struct elf32_arm_link_hash_entry *hash;
11201
11202 hash = (struct elf32_arm_link_hash_entry *) h;
11203
11204 stub_type = arm_type_of_stub (info, input_section, rel,
34e77a92
RS		 11205 st_type, &branch_type,
11206 hash, value, sym_sec,
fe33d2fa
CL		 11207 input_bfd, sym_name);
11208
11209 if (stub_type != arm_stub_none)
906e58ca
NC		 11210 {
11211 /* The target is out of reach or we are changing modes, so
11212 redirect the branch to the local stub for this
11213 function. */
11214 stub_entry = elf32_arm_get_stub_entry (input_section,
11215 sym_sec, h,
fe33d2fa
CL		 11216 rel, globals,
11217 stub_type);
906e58ca 11218 if (stub_entry != NULL)
9cd3e4e5
NC		 11219 {
11220 value = (stub_entry->stub_offset
11221 + stub_entry->stub_sec->output_offset
11222 + stub_entry->stub_sec->output_section->vma);
11223
11224 if (plt_offset != (bfd_vma) -1)
11225 *unresolved_reloc_p = FALSE;
11226 }
906e58ca 11227
f4ac8484 11228 /* If this call becomes a call to Arm, force BLX. */
155d87d7 11229 if (globals->use_blx && (r_type == R_ARM_THM_CALL))
f4ac8484
DJ		 11230 {
11231 if ((stub_entry
11232 && !arm_stub_is_thumb (stub_entry->stub_type))
35fc36a8 11233 || branch_type != ST_BRANCH_TO_THUMB)
f4ac8484
DJ		 11234 lower_insn = (lower_insn & ~0x1000) | 0x0800;
11235 }
906e58ca
NC		 11236 }
11237 }
11238
fe33d2fa 11239 /* Handle calls via the PLT. */
34e77a92 11240 if (stub_type == arm_stub_none && plt_offset != (bfd_vma) -1)
fe33d2fa
CL		 11241 {
11242 value = (splt->output_section->vma
11243 + splt->output_offset
34e77a92 11244 + plt_offset);
fe33d2fa 11245
eed94f8f
NC		 11246 if (globals->use_blx
11247 && r_type == R_ARM_THM_CALL
11248 && ! using_thumb_only (globals))
fe33d2fa
CL		 11249 {
11250 /* If the Thumb BLX instruction is available, convert
11251 the BL to a BLX instruction to call the ARM-mode
11252 PLT entry. */
11253 lower_insn = (lower_insn & ~0x1000) | 0x0800;
35fc36a8 11254 branch_type = ST_BRANCH_TO_ARM;
fe33d2fa
CL		 11255 }
11256 else
11257 {
eed94f8f
NC		 11258 if (! using_thumb_only (globals))
11259 /* Target the Thumb stub before the ARM PLT entry. */
11260 value -= PLT_THUMB_STUB_SIZE;
35fc36a8 11261 branch_type = ST_BRANCH_TO_THUMB;
fe33d2fa
CL		 11262 }
11263 *unresolved_reloc_p = FALSE;
11264 }
11265
ba96a88f 11266 relocation = value + signed_addend;
f21f3fe0 11267
252b5132 11268 relocation -= (input_section->output_section->vma
ba96a88f
NC		 11269 + input_section->output_offset
11270 + rel->r_offset);
9a5aca8c 11271
252b5132
RH		 11272 check = relocation >> howto->rightshift;
11273
11274 /* If this is a signed value, the rightshift just dropped
11275 leading 1 bits (assuming twos complement). */
11276 if ((bfd_signed_vma) relocation >= 0)
11277 signed_check = check;
11278 else
11279 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
11280
e95de063
MS		 11281 /* Calculate the permissable maximum and minimum values for
11282 this relocation according to whether we're relocating for
11283 Thumb-2 or not. */
11284 bitsize = howto->bitsize;
5e866f5a 11285 if (!thumb2_bl)
e95de063 11286 bitsize -= 2;
f6ebfac0 11287 reloc_signed_max = (1 << (bitsize - 1)) - 1;
e95de063
MS		 11288 reloc_signed_min = ~reloc_signed_max;
11289
252b5132 11290 /* Assumes two's complement. */
ba96a88f 11291 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
b34976b6 11292 overflow = TRUE;
252b5132 11293
bd97cb95 11294 if ((lower_insn & 0x5000) == 0x4000)
c62e1cc3
NC		 11295 /* For a BLX instruction, make sure that the relocation is rounded up
11296 to a word boundary. This follows the semantics of the instruction
11297 which specifies that bit 1 of the target address will come from bit
11298 1 of the base address. */
11299 relocation = (relocation + 2) & ~ 3;
cb1afa5c 11300
e95de063
MS		 11301 /* Put RELOCATION back into the insn. Assumes two's complement.
11302 We use the Thumb-2 encoding, which is safe even if dealing with
11303 a Thumb-1 instruction by virtue of our overflow check above. */
99059e56 11304 reloc_sign = (signed_check < 0) ? 1 : 0;
e95de063 11305 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
99059e56
RM		 11306 | ((relocation >> 12) & 0x3ff)
11307 | (reloc_sign << 10);
906e58ca 11308 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
99059e56
RM		 11309 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
11310 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
11311 | ((relocation >> 1) & 0x7ff);
c62e1cc3 11312
252b5132
RH		 11313 /* Put the relocated value back in the object file: */
11314 bfd_put_16 (input_bfd, upper_insn, hit_data);
11315 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
11316
11317 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
11318 }
11319 break;
11320
c19d1205
ZW		 11321 case R_ARM_THM_JUMP19:
11322 /* Thumb32 conditional branch instruction. */
11323 {
11324 bfd_vma relocation;
11325 bfd_boolean overflow = FALSE;
11326 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
11327 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
a00a1f35
MS		 11328 bfd_signed_vma reloc_signed_max = 0xffffe;
11329 bfd_signed_vma reloc_signed_min = -0x100000;
c19d1205 11330 bfd_signed_vma signed_check;
07d6d2b8 11331 enum elf32_arm_stub_type stub_type = arm_stub_none;
c5423981
TG		 11332 struct elf32_arm_stub_hash_entry *stub_entry;
11333 struct elf32_arm_link_hash_entry *hash;
c19d1205
ZW		 11334
11335 /* Need to refetch the addend, reconstruct the top three bits,
11336 and squish the two 11 bit pieces together. */
11337 if (globals->use_rel)
11338 {
11339 bfd_vma S = (upper_insn & 0x0400) >> 10;
a00a1f35 11340 bfd_vma upper = (upper_insn & 0x003f);
c19d1205
ZW		 11341 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
11342 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
11343 bfd_vma lower = (lower_insn & 0x07ff);
11344
a00a1f35
MS		 11345 upper |= J1 << 6;
11346 upper |= J2 << 7;
11347 upper |= (!S) << 8;
c19d1205
ZW		 11348 upper -= 0x0100; /* Sign extend. */
11349
11350 addend = (upper << 12) | (lower << 1);
11351 signed_addend = addend;
11352 }
11353
bd97cb95 11354 /* Handle calls via the PLT. */
34e77a92 11355 if (plt_offset != (bfd_vma) -1)
bd97cb95
DJ		 11356 {
11357 value = (splt->output_section->vma
11358 + splt->output_offset
34e77a92 11359 + plt_offset);
bd97cb95
DJ		 11360 /* Target the Thumb stub before the ARM PLT entry. */
11361 value -= PLT_THUMB_STUB_SIZE;
11362 *unresolved_reloc_p = FALSE;
11363 }
11364
c5423981
TG		 11365 hash = (struct elf32_arm_link_hash_entry *)h;
11366
11367 stub_type = arm_type_of_stub (info, input_section, rel,
07d6d2b8
AM		 11368 st_type, &branch_type,
11369 hash, value, sym_sec,
11370 input_bfd, sym_name);
c5423981
TG		 11371 if (stub_type != arm_stub_none)
11372 {
11373 stub_entry = elf32_arm_get_stub_entry (input_section,
07d6d2b8
AM		 11374 sym_sec, h,
11375 rel, globals,
11376 stub_type);
c5423981
TG		 11377 if (stub_entry != NULL)
11378 {
07d6d2b8
AM		 11379 value = (stub_entry->stub_offset
11380 + stub_entry->stub_sec->output_offset
11381 + stub_entry->stub_sec->output_section->vma);
c5423981
TG		 11382 }
11383 }
c19d1205 11384
99059e56 11385 relocation = value + signed_addend;
c19d1205
ZW		 11386 relocation -= (input_section->output_section->vma
11387 + input_section->output_offset
11388 + rel->r_offset);
a00a1f35 11389 signed_check = (bfd_signed_vma) relocation;
c19d1205 11390
c19d1205
ZW		 11391 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
11392 overflow = TRUE;
11393
11394 /* Put RELOCATION back into the insn. */
11395 {
11396 bfd_vma S = (relocation & 0x00100000) >> 20;
11397 bfd_vma J2 = (relocation & 0x00080000) >> 19;
11398 bfd_vma J1 = (relocation & 0x00040000) >> 18;
11399 bfd_vma hi = (relocation & 0x0003f000) >> 12;
11400 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
11401
a00a1f35 11402 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
c19d1205
ZW		 11403 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
11404 }
11405
11406 /* Put the relocated value back in the object file: */
11407 bfd_put_16 (input_bfd, upper_insn, hit_data);
11408 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
11409
11410 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
11411 }
11412
11413 case R_ARM_THM_JUMP11:
11414 case R_ARM_THM_JUMP8:
11415 case R_ARM_THM_JUMP6:
51c5503b
NC		 11416 /* Thumb B (branch) instruction). */
11417 {
6cf9e9fe 11418 bfd_signed_vma relocation;
51c5503b
NC		 11419 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
11420 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
51c5503b
NC		 11421 bfd_signed_vma signed_check;
11422
c19d1205
ZW		 11423 /* CZB cannot jump backward. */
11424 if (r_type == R_ARM_THM_JUMP6)
11425 reloc_signed_min = 0;
11426
4e7fd91e 11427 if (globals->use_rel)
6cf9e9fe 11428 {
4e7fd91e
PB		 11429 /* Need to refetch addend. */
11430 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
11431 if (addend & ((howto->src_mask + 1) >> 1))
11432 {
11433 signed_addend = -1;
11434 signed_addend &= ~ howto->src_mask;
11435 signed_addend |= addend;
11436 }
11437 else
11438 signed_addend = addend;
11439 /* The value in the insn has been right shifted. We need to
11440 undo this, so that we can perform the address calculation
11441 in terms of bytes. */
11442 signed_addend <<= howto->rightshift;
6cf9e9fe 11443 }
6cf9e9fe 11444 relocation = value + signed_addend;
51c5503b
NC		 11445
11446 relocation -= (input_section->output_section->vma
11447 + input_section->output_offset
11448 + rel->r_offset);
11449
6cf9e9fe
NC		 11450 relocation >>= howto->rightshift;
11451 signed_check = relocation;
c19d1205
ZW		 11452
11453 if (r_type == R_ARM_THM_JUMP6)
11454 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
11455 else
11456 relocation &= howto->dst_mask;
51c5503b 11457 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
cedb70c5 11458
51c5503b
NC		 11459 bfd_put_16 (input_bfd, relocation, hit_data);
11460
11461 /* Assumes two's complement. */
11462 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
11463 return bfd_reloc_overflow;
11464
11465 return bfd_reloc_ok;
11466 }
cedb70c5 11467
8375c36b
PB		 11468 case R_ARM_ALU_PCREL7_0:
11469 case R_ARM_ALU_PCREL15_8:
11470 case R_ARM_ALU_PCREL23_15:
11471 {
11472 bfd_vma insn;
11473 bfd_vma relocation;
11474
11475 insn = bfd_get_32 (input_bfd, hit_data);
4e7fd91e
PB		 11476 if (globals->use_rel)
11477 {
11478 /* Extract the addend. */
11479 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
11480 signed_addend = addend;
11481 }
8375c36b
PB		 11482 relocation = value + signed_addend;
11483
11484 relocation -= (input_section->output_section->vma
11485 + input_section->output_offset
11486 + rel->r_offset);
11487 insn = (insn & ~0xfff)
11488 | ((howto->bitpos << 7) & 0xf00)
11489 | ((relocation >> howto->bitpos) & 0xff);
11490 bfd_put_32 (input_bfd, value, hit_data);
11491 }
11492 return bfd_reloc_ok;
11493
252b5132
RH		 11494 case R_ARM_GNU_VTINHERIT:
11495 case R_ARM_GNU_VTENTRY:
11496 return bfd_reloc_ok;
11497
c19d1205 11498 case R_ARM_GOTOFF32:
252b5132 11499 /* Relocation is relative to the start of the
99059e56 11500 global offset table. */
252b5132
RH		 11501
11502 BFD_ASSERT (sgot != NULL);
11503 if (sgot == NULL)
99059e56 11504 return bfd_reloc_notsupported;
9a5aca8c 11505
cedb70c5 11506 /* If we are addressing a Thumb function, we need to adjust the
ee29b9fb
RE		 11507 address by one, so that attempts to call the function pointer will
11508 correctly interpret it as Thumb code. */
35fc36a8 11509 if (branch_type == ST_BRANCH_TO_THUMB)
ee29b9fb
RE		 11510 value += 1;
11511
252b5132 11512 /* Note that sgot->output_offset is not involved in this
99059e56
RM		 11513 calculation. We always want the start of .got. If we
11514 define _GLOBAL_OFFSET_TABLE in a different way, as is
11515 permitted by the ABI, we might have to change this
11516 calculation. */
252b5132 11517 value -= sgot->output_section->vma;
f21f3fe0 11518 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17 11519 contents, rel->r_offset, value,
00a97672 11520 rel->r_addend);
252b5132
RH		 11521
11522 case R_ARM_GOTPC:
a7c10850 11523 /* Use global offset table as symbol value. */
252b5132 11524 BFD_ASSERT (sgot != NULL);
f21f3fe0 11525
252b5132 11526 if (sgot == NULL)
99059e56 11527 return bfd_reloc_notsupported;
252b5132 11528
0945cdfd 11529 *unresolved_reloc_p = FALSE;
252b5132 11530 value = sgot->output_section->vma;
f21f3fe0 11531 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17 11532 contents, rel->r_offset, value,
00a97672 11533 rel->r_addend);
f21f3fe0 11534
252b5132 11535 case R_ARM_GOT32:
eb043451 11536 case R_ARM_GOT_PREL:
252b5132 11537 /* Relocation is to the entry for this symbol in the
99059e56 11538 global offset table. */
252b5132
RH		 11539 if (sgot == NULL)
11540 return bfd_reloc_notsupported;
f21f3fe0 11541
34e77a92
RS		 11542 if (dynreloc_st_type == STT_GNU_IFUNC
11543 && plt_offset != (bfd_vma) -1
11544 && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h)))
11545 {
11546 /* We have a relocation against a locally-binding STT_GNU_IFUNC
11547 symbol, and the relocation resolves directly to the runtime
11548 target rather than to the .iplt entry. This means that any
11549 .got entry would be the same value as the .igot.plt entry,
11550 so there's no point creating both. */
11551 sgot = globals->root.igotplt;
11552 value = sgot->output_offset + gotplt_offset;
11553 }
11554 else if (h != NULL)
252b5132
RH		 11555 {
11556 bfd_vma off;
f21f3fe0 11557
252b5132
RH		 11558 off = h->got.offset;
11559 BFD_ASSERT (off != (bfd_vma) -1);
b436d854 11560 if ((off & 1) != 0)
252b5132 11561 {
b436d854
RS		 11562 /* We have already processsed one GOT relocation against
11563 this symbol. */
11564 off &= ~1;
11565 if (globals->root.dynamic_sections_created
11566 && !SYMBOL_REFERENCES_LOCAL (info, h))
11567 *unresolved_reloc_p = FALSE;
11568 }
11569 else
11570 {
11571 Elf_Internal_Rela outrel;
e8b09b87 11572 int isrofixup = 0;
b436d854 11573
e8b09b87
CL		 11574 if (((h->dynindx != -1) || globals->fdpic_p)
11575 && !SYMBOL_REFERENCES_LOCAL (info, h))
b436d854
RS		 11576 {
11577 /* If the symbol doesn't resolve locally in a static
11578 object, we have an undefined reference. If the
11579 symbol doesn't resolve locally in a dynamic object,
11580 it should be resolved by the dynamic linker. */
11581 if (globals->root.dynamic_sections_created)
11582 {
11583 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
11584 *unresolved_reloc_p = FALSE;
11585 }
11586 else
11587 outrel.r_info = 0;
11588 outrel.r_addend = 0;
11589 }
252b5132
RH		 11590 else
11591 {
34e77a92 11592 if (dynreloc_st_type == STT_GNU_IFUNC)
99059e56 11593 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
5025eb7c 11594 else if (bfd_link_pic (info)
7f026732 11595 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
99059e56
RM		 11596 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
11597 else
2376f038
EB		 11598 {
11599 outrel.r_info = 0;
11600 if (globals->fdpic_p)
11601 isrofixup = 1;
11602 }
34e77a92 11603 outrel.r_addend = dynreloc_value;
b436d854 11604 }
ee29b9fb 11605
b436d854
RS		 11606 /* The GOT entry is initialized to zero by default.
11607 See if we should install a different value. */
11608 if (outrel.r_addend != 0
2376f038 11609 && (globals->use_rel || outrel.r_info == 0))
b436d854
RS		 11610 {
11611 bfd_put_32 (output_bfd, outrel.r_addend,
11612 sgot->contents + off);
11613 outrel.r_addend = 0;
252b5132 11614 }
f21f3fe0 11615
2376f038
EB		 11616 if (isrofixup)
11617 arm_elf_add_rofixup (output_bfd,
11618 elf32_arm_hash_table(info)->srofixup,
11619 sgot->output_section->vma
11620 + sgot->output_offset + off);
11621
11622 else if (outrel.r_info != 0)
b436d854
RS		 11623 {
11624 outrel.r_offset = (sgot->output_section->vma
11625 + sgot->output_offset
11626 + off);
11627 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
11628 }
2376f038 11629
b436d854
RS		 11630 h->got.offset |= 1;
11631 }
252b5132
RH		 11632 value = sgot->output_offset + off;
11633 }
11634 else
11635 {
11636 bfd_vma off;
f21f3fe0 11637
5025eb7c
AO		 11638 BFD_ASSERT (local_got_offsets != NULL
11639 && local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 11640
252b5132 11641 off = local_got_offsets[r_symndx];
f21f3fe0 11642
252b5132
RH		 11643 /* The offset must always be a multiple of 4. We use the
11644 least significant bit to record whether we have already
9b485d32 11645 generated the necessary reloc. */
252b5132
RH		 11646 if ((off & 1) != 0)
11647 off &= ~1;
11648 else
11649 {
2376f038
EB		 11650 Elf_Internal_Rela outrel;
11651 int isrofixup = 0;
f21f3fe0 11652
2376f038
EB		 11653 if (dynreloc_st_type == STT_GNU_IFUNC)
11654 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
11655 else if (bfd_link_pic (info))
11656 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
11657 else
252b5132 11658 {
2376f038
EB		 11659 outrel.r_info = 0;
11660 if (globals->fdpic_p)
11661 isrofixup = 1;
11662 }
11663
11664 /* The GOT entry is initialized to zero by default.
11665 See if we should install a different value. */
11666 if (globals->use_rel || outrel.r_info == 0)
11667 bfd_put_32 (output_bfd, dynreloc_value, sgot->contents + off);
11668
11669 if (isrofixup)
11670 arm_elf_add_rofixup (output_bfd,
11671 globals->srofixup,
11672 sgot->output_section->vma
11673 + sgot->output_offset + off);
f21f3fe0 11674
2376f038
EB		 11675 else if (outrel.r_info != 0)
11676 {
34e77a92 11677 outrel.r_addend = addend + dynreloc_value;
252b5132 11678 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 11679 + sgot->output_offset
252b5132 11680 + off);
47beaa6a 11681 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
252b5132 11682 }
f21f3fe0 11683
252b5132
RH		 11684 local_got_offsets[r_symndx] |= 1;
11685 }
f21f3fe0 11686
252b5132
RH		 11687 value = sgot->output_offset + off;
11688 }
eb043451
PB		 11689 if (r_type != R_ARM_GOT32)
11690 value += sgot->output_section->vma;
9a5aca8c 11691
f21f3fe0 11692 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17 11693 contents, rel->r_offset, value,
00a97672 11694 rel->r_addend);
f21f3fe0 11695
ba93b8ac
DJ		 11696 case R_ARM_TLS_LDO32:
11697 value = value - dtpoff_base (info);
11698
11699 return _bfd_final_link_relocate (howto, input_bfd, input_section,
00a97672
RS		 11700 contents, rel->r_offset, value,
11701 rel->r_addend);
ba93b8ac
DJ		 11702
11703 case R_ARM_TLS_LDM32:
5c5a4843 11704 case R_ARM_TLS_LDM32_FDPIC:
ba93b8ac
DJ		 11705 {
11706 bfd_vma off;
11707
362d30a1 11708 if (sgot == NULL)
ba93b8ac
DJ		 11709 abort ();
11710
11711 off = globals->tls_ldm_got.offset;
11712
11713 if ((off & 1) != 0)
11714 off &= ~1;
11715 else
11716 {
11717 /* If we don't know the module number, create a relocation
11718 for it. */
9cb09e33 11719 if (bfd_link_dll (info))
ba93b8ac
DJ		 11720 {
11721 Elf_Internal_Rela outrel;
ba93b8ac 11722
362d30a1 11723 if (srelgot == NULL)
ba93b8ac
DJ		 11724 abort ();
11725
00a97672 11726 outrel.r_addend = 0;
362d30a1
RS		 11727 outrel.r_offset = (sgot->output_section->vma
11728 + sgot->output_offset + off);
ba93b8ac
DJ		 11729 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
11730
00a97672
RS		 11731 if (globals->use_rel)
11732 bfd_put_32 (output_bfd, outrel.r_addend,
362d30a1 11733 sgot->contents + off);
ba93b8ac 11734
47beaa6a 11735 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
ba93b8ac
DJ		 11736 }
11737 else
362d30a1 11738 bfd_put_32 (output_bfd, 1, sgot->contents + off);
ba93b8ac
DJ		 11739
11740 globals->tls_ldm_got.offset |= 1;
11741 }
11742
5c5a4843 11743 if (r_type == R_ARM_TLS_LDM32_FDPIC)
e8b09b87
CL		 11744 {
11745 bfd_put_32(output_bfd,
11746 globals->root.sgot->output_offset + off,
11747 contents + rel->r_offset);
11748
11749 return bfd_reloc_ok;
11750 }
11751 else
11752 {
11753 value = sgot->output_section->vma + sgot->output_offset + off
11754 - (input_section->output_section->vma
11755 + input_section->output_offset + rel->r_offset);
ba93b8ac 11756
e8b09b87
CL		 11757 return _bfd_final_link_relocate (howto, input_bfd, input_section,
11758 contents, rel->r_offset, value,
11759 rel->r_addend);
11760 }
ba93b8ac
DJ		 11761 }
11762
0855e32b
NS		 11763 case R_ARM_TLS_CALL:
11764 case R_ARM_THM_TLS_CALL:
ba93b8ac 11765 case R_ARM_TLS_GD32:
5c5a4843 11766 case R_ARM_TLS_GD32_FDPIC:
ba93b8ac 11767 case R_ARM_TLS_IE32:
5c5a4843 11768 case R_ARM_TLS_IE32_FDPIC:
0855e32b
NS		 11769 case R_ARM_TLS_GOTDESC:
11770 case R_ARM_TLS_DESCSEQ:
11771 case R_ARM_THM_TLS_DESCSEQ:
ba93b8ac 11772 {
0855e32b
NS		 11773 bfd_vma off, offplt;
11774 int indx = 0;
ba93b8ac
DJ		 11775 char tls_type;
11776
0855e32b 11777 BFD_ASSERT (sgot != NULL);
ba93b8ac 11778
ba93b8ac
DJ		 11779 if (h != NULL)
11780 {
11781 bfd_boolean dyn;
11782 dyn = globals->root.dynamic_sections_created;
0e1862bb
L		 11783 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
11784 bfd_link_pic (info),
11785 h)
11786 && (!bfd_link_pic (info)
ba93b8ac
DJ		 11787 || !SYMBOL_REFERENCES_LOCAL (info, h)))
11788 {
11789 *unresolved_reloc_p = FALSE;
11790 indx = h->dynindx;
11791 }
11792 off = h->got.offset;
0855e32b 11793 offplt = elf32_arm_hash_entry (h)->tlsdesc_got;
ba93b8ac
DJ		 11794 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
11795 }
11796 else
11797 {
0855e32b 11798 BFD_ASSERT (local_got_offsets != NULL);
ba93b8ac 11799 off = local_got_offsets[r_symndx];
0855e32b 11800 offplt = local_tlsdesc_gotents[r_symndx];
ba93b8ac
DJ		 11801 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
11802 }
11803
0855e32b 11804 /* Linker relaxations happens from one of the
b38cadfb 11805 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
0855e32b 11806 if (ELF32_R_TYPE(rel->r_info) != r_type)
b38cadfb 11807 tls_type = GOT_TLS_IE;
0855e32b
NS		 11808
11809 BFD_ASSERT (tls_type != GOT_UNKNOWN);
ba93b8ac
DJ		 11810
11811 if ((off & 1) != 0)
11812 off &= ~1;
11813 else
11814 {
11815 bfd_boolean need_relocs = FALSE;
11816 Elf_Internal_Rela outrel;
ba93b8ac
DJ		 11817 int cur_off = off;
11818
11819 /* The GOT entries have not been initialized yet. Do it
11820 now, and emit any relocations. If both an IE GOT and a
11821 GD GOT are necessary, we emit the GD first. */
11822
9cb09e33 11823 if ((bfd_link_dll (info) || indx != 0)
ba93b8ac 11824 && (h == NULL
95b03e4a
L		 11825 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
11826 && !resolved_to_zero)
ba93b8ac
DJ		 11827 || h->root.type != bfd_link_hash_undefweak))
11828 {
11829 need_relocs = TRUE;
0855e32b 11830 BFD_ASSERT (srelgot != NULL);
ba93b8ac
DJ		 11831 }
11832
0855e32b
NS		 11833 if (tls_type & GOT_TLS_GDESC)
11834 {
47beaa6a
RS		 11835 bfd_byte *loc;
11836
0855e32b
NS		 11837 /* We should have relaxed, unless this is an undefined
11838 weak symbol. */
11839 BFD_ASSERT ((h && (h->root.type == bfd_link_hash_undefweak))
9cb09e33 11840 || bfd_link_dll (info));
0855e32b 11841 BFD_ASSERT (globals->sgotplt_jump_table_size + offplt + 8
99059e56 11842 <= globals->root.sgotplt->size);
0855e32b
NS		 11843
11844 outrel.r_addend = 0;
11845 outrel.r_offset = (globals->root.sgotplt->output_section->vma
11846 + globals->root.sgotplt->output_offset
11847 + offplt
11848 + globals->sgotplt_jump_table_size);
b38cadfb 11849
0855e32b
NS		 11850 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DESC);
11851 sreloc = globals->root.srelplt;
11852 loc = sreloc->contents;
11853 loc += globals->next_tls_desc_index++ * RELOC_SIZE (globals);
11854 BFD_ASSERT (loc + RELOC_SIZE (globals)
99059e56 11855 <= sreloc->contents + sreloc->size);
0855e32b
NS		 11856
11857 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
11858
11859 /* For globals, the first word in the relocation gets
11860 the relocation index and the top bit set, or zero,
11861 if we're binding now. For locals, it gets the
11862 symbol's offset in the tls section. */
99059e56 11863 bfd_put_32 (output_bfd,
0855e32b
NS		 11864 !h ? value - elf_hash_table (info)->tls_sec->vma
11865 : info->flags & DF_BIND_NOW ? 0
11866 : 0x80000000 | ELF32_R_SYM (outrel.r_info),
b38cadfb
NC		 11867 globals->root.sgotplt->contents + offplt
11868 + globals->sgotplt_jump_table_size);
11869
0855e32b 11870 /* Second word in the relocation is always zero. */
99059e56 11871 bfd_put_32 (output_bfd, 0,
b38cadfb
NC		 11872 globals->root.sgotplt->contents + offplt
11873 + globals->sgotplt_jump_table_size + 4);
0855e32b 11874 }
ba93b8ac
DJ		 11875 if (tls_type & GOT_TLS_GD)
11876 {
11877 if (need_relocs)
11878 {
00a97672 11879 outrel.r_addend = 0;
362d30a1
RS		 11880 outrel.r_offset = (sgot->output_section->vma
11881 + sgot->output_offset
00a97672 11882 + cur_off);
ba93b8ac 11883 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
ba93b8ac 11884
00a97672
RS		 11885 if (globals->use_rel)
11886 bfd_put_32 (output_bfd, outrel.r_addend,
362d30a1 11887 sgot->contents + cur_off);
00a97672 11888
47beaa6a 11889 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
ba93b8ac
DJ		 11890
11891 if (indx == 0)
11892 bfd_put_32 (output_bfd, value - dtpoff_base (info),
362d30a1 11893 sgot->contents + cur_off + 4);
ba93b8ac
DJ		 11894 else
11895 {
00a97672 11896 outrel.r_addend = 0;
ba93b8ac
DJ		 11897 outrel.r_info = ELF32_R_INFO (indx,
11898 R_ARM_TLS_DTPOFF32);
11899 outrel.r_offset += 4;
00a97672
RS		 11900
11901 if (globals->use_rel)
11902 bfd_put_32 (output_bfd, outrel.r_addend,
362d30a1 11903 sgot->contents + cur_off + 4);
00a97672 11904
47beaa6a
RS		 11905 elf32_arm_add_dynreloc (output_bfd, info,
11906 srelgot, &outrel);
ba93b8ac
DJ		 11907 }
11908 }
11909 else
11910 {
11911 /* If we are not emitting relocations for a
11912 general dynamic reference, then we must be in a
11913 static link or an executable link with the
11914 symbol binding locally. Mark it as belonging
11915 to module 1, the executable. */
11916 bfd_put_32 (output_bfd, 1,
362d30a1 11917 sgot->contents + cur_off);
ba93b8ac 11918 bfd_put_32 (output_bfd, value - dtpoff_base (info),
362d30a1 11919 sgot->contents + cur_off + 4);
ba93b8ac
DJ		 11920 }
11921
11922 cur_off += 8;
11923 }
11924
11925 if (tls_type & GOT_TLS_IE)
11926 {
11927 if (need_relocs)
11928 {
00a97672
RS		 11929 if (indx == 0)
11930 outrel.r_addend = value - dtpoff_base (info);
11931 else
11932 outrel.r_addend = 0;
362d30a1
RS		 11933 outrel.r_offset = (sgot->output_section->vma
11934 + sgot->output_offset
ba93b8ac
DJ		 11935 + cur_off);
11936 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
11937
00a97672
RS		 11938 if (globals->use_rel)
11939 bfd_put_32 (output_bfd, outrel.r_addend,
362d30a1 11940 sgot->contents + cur_off);
ba93b8ac 11941
47beaa6a 11942 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
ba93b8ac
DJ		 11943 }
11944 else
11945 bfd_put_32 (output_bfd, tpoff (info, value),
362d30a1 11946 sgot->contents + cur_off);
ba93b8ac
DJ		 11947 cur_off += 4;
11948 }
11949
11950 if (h != NULL)
11951 h->got.offset |= 1;
11952 else
11953 local_got_offsets[r_symndx] |= 1;
11954 }
11955
5c5a4843 11956 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32 && r_type != R_ARM_TLS_GD32_FDPIC)
ba93b8ac 11957 off += 8;
0855e32b
NS		 11958 else if (tls_type & GOT_TLS_GDESC)
11959 off = offplt;
11960
11961 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL
11962 || ELF32_R_TYPE(rel->r_info) == R_ARM_THM_TLS_CALL)
11963 {
11964 bfd_signed_vma offset;
12352d3f
PB		 11965 /* TLS stubs are arm mode. The original symbol is a
11966 data object, so branch_type is bogus. */
11967 branch_type = ST_BRANCH_TO_ARM;
0855e32b 11968 enum elf32_arm_stub_type stub_type
34e77a92
RS		 11969 = arm_type_of_stub (info, input_section, rel,
11970 st_type, &branch_type,
0855e32b
NS		 11971 (struct elf32_arm_link_hash_entry *)h,
11972 globals->tls_trampoline, globals->root.splt,
11973 input_bfd, sym_name);
11974
11975 if (stub_type != arm_stub_none)
11976 {
11977 struct elf32_arm_stub_hash_entry *stub_entry
11978 = elf32_arm_get_stub_entry
11979 (input_section, globals->root.splt, 0, rel,
11980 globals, stub_type);
11981 offset = (stub_entry->stub_offset
11982 + stub_entry->stub_sec->output_offset
11983 + stub_entry->stub_sec->output_section->vma);
11984 }
11985 else
11986 offset = (globals->root.splt->output_section->vma
11987 + globals->root.splt->output_offset
11988 + globals->tls_trampoline);
11989
11990 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL)
11991 {
11992 unsigned long inst;
b38cadfb
NC		 11993
11994 offset -= (input_section->output_section->vma
11995 + input_section->output_offset
11996 + rel->r_offset + 8);
0855e32b
NS		 11997
11998 inst = offset >> 2;
11999 inst &= 0x00ffffff;
12000 value = inst | (globals->use_blx ? 0xfa000000 : 0xeb000000);
12001 }
12002 else
12003 {
12004 /* Thumb blx encodes the offset in a complicated
12005 fashion. */
12006 unsigned upper_insn, lower_insn;
12007 unsigned neg;
12008
b38cadfb
NC		 12009 offset -= (input_section->output_section->vma
12010 + input_section->output_offset
0855e32b 12011 + rel->r_offset + 4);
b38cadfb 12012
12352d3f
PB		 12013 if (stub_type != arm_stub_none
12014 && arm_stub_is_thumb (stub_type))
12015 {
12016 lower_insn = 0xd000;
12017 }
12018 else
12019 {
12020 lower_insn = 0xc000;
6a631e86 12021 /* Round up the offset to a word boundary. */
12352d3f
PB		 12022 offset = (offset + 2) & ~2;
12023 }
12024
0855e32b
NS		 12025 neg = offset < 0;
12026 upper_insn = (0xf000
12027 | ((offset >> 12) & 0x3ff)
12028 | (neg << 10));
12352d3f 12029 lower_insn |= (((!((offset >> 23) & 1)) ^ neg) << 13)
0855e32b 12030 | (((!((offset >> 22) & 1)) ^ neg) << 11)
12352d3f 12031 | ((offset >> 1) & 0x7ff);
0855e32b
NS		 12032 bfd_put_16 (input_bfd, upper_insn, hit_data);
12033 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
12034 return bfd_reloc_ok;
12035 }
12036 }
12037 /* These relocations needs special care, as besides the fact
12038 they point somewhere in .gotplt, the addend must be
12039 adjusted accordingly depending on the type of instruction
6a631e86 12040 we refer to. */
0855e32b
NS		 12041 else if ((r_type == R_ARM_TLS_GOTDESC) && (tls_type & GOT_TLS_GDESC))
12042 {
12043 unsigned long data, insn;
12044 unsigned thumb;
b38cadfb 12045
b627f562 12046 data = bfd_get_signed_32 (input_bfd, hit_data);
0855e32b 12047 thumb = data & 1;
b627f562 12048 data &= ~1ul;
b38cadfb 12049
0855e32b
NS		 12050 if (thumb)
12051 {
12052 insn = bfd_get_16 (input_bfd, contents + rel->r_offset - data);
12053 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
12054 insn = (insn << 16)
12055 | bfd_get_16 (input_bfd,
12056 contents + rel->r_offset - data + 2);
12057 if ((insn & 0xf800c000) == 0xf000c000)
12058 /* bl/blx */
12059 value = -6;
12060 else if ((insn & 0xffffff00) == 0x4400)
12061 /* add */
12062 value = -5;
12063 else
12064 {
4eca0228 12065 _bfd_error_handler
695344c0 12066 /* xgettext:c-format */
2dcf00ce 12067 (_("%pB(%pA+%#" PRIx64 "): "
90b6238f 12068 "unexpected %s instruction '%#lx' "
2dcf00ce
AM		 12069 "referenced by TLS_GOTDESC"),
12070 input_bfd, input_section, (uint64_t) rel->r_offset,
90b6238f 12071 "Thumb", insn);
0855e32b
NS		 12072 return bfd_reloc_notsupported;
12073 }
12074 }
12075 else
12076 {
12077 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - data);
12078
12079 switch (insn >> 24)
12080 {
12081 case 0xeb: /* bl */
12082 case 0xfa: /* blx */
12083 value = -4;
12084 break;
12085
12086 case 0xe0: /* add */
12087 value = -8;
12088 break;
b38cadfb 12089
0855e32b 12090 default:
4eca0228 12091 _bfd_error_handler
695344c0 12092 /* xgettext:c-format */
2dcf00ce 12093 (_("%pB(%pA+%#" PRIx64 "): "
90b6238f 12094 "unexpected %s instruction '%#lx' "
2dcf00ce
AM		 12095 "referenced by TLS_GOTDESC"),
12096 input_bfd, input_section, (uint64_t) rel->r_offset,
90b6238f 12097 "ARM", insn);
0855e32b
NS		 12098 return bfd_reloc_notsupported;
12099 }
12100 }
b38cadfb 12101
0855e32b
NS		 12102 value += ((globals->root.sgotplt->output_section->vma
12103 + globals->root.sgotplt->output_offset + off)
12104 - (input_section->output_section->vma
12105 + input_section->output_offset
12106 + rel->r_offset)
12107 + globals->sgotplt_jump_table_size);
12108 }
12109 else
12110 value = ((globals->root.sgot->output_section->vma
12111 + globals->root.sgot->output_offset + off)
12112 - (input_section->output_section->vma
12113 + input_section->output_offset + rel->r_offset));
ba93b8ac 12114
5c5a4843
CL		 12115 if (globals->fdpic_p && (r_type == R_ARM_TLS_GD32_FDPIC ||
12116 r_type == R_ARM_TLS_IE32_FDPIC))
e8b09b87
CL		 12117 {
12118 /* For FDPIC relocations, resolve to the offset of the GOT
12119 entry from the start of GOT. */
12120 bfd_put_32(output_bfd,
12121 globals->root.sgot->output_offset + off,
12122 contents + rel->r_offset);
12123
12124 return bfd_reloc_ok;
12125 }
12126 else
12127 {
12128 return _bfd_final_link_relocate (howto, input_bfd, input_section,
12129 contents, rel->r_offset, value,
12130 rel->r_addend);
12131 }
ba93b8ac
DJ		 12132 }
12133
12134 case R_ARM_TLS_LE32:
3cbc1e5e 12135 if (bfd_link_dll (info))
ba93b8ac 12136 {
4eca0228 12137 _bfd_error_handler
695344c0 12138 /* xgettext:c-format */
2dcf00ce
AM		 12139 (_("%pB(%pA+%#" PRIx64 "): %s relocation not permitted "
12140 "in shared object"),
12141 input_bfd, input_section, (uint64_t) rel->r_offset, howto->name);
46691134 12142 return bfd_reloc_notsupported;
ba93b8ac
DJ		 12143 }
12144 else
12145 value = tpoff (info, value);
906e58ca 12146
ba93b8ac 12147 return _bfd_final_link_relocate (howto, input_bfd, input_section,
00a97672
RS		 12148 contents, rel->r_offset, value,
12149 rel->r_addend);
ba93b8ac 12150
319850b4
JB		 12151 case R_ARM_V4BX:
12152 if (globals->fix_v4bx)
845b51d6
PB		 12153 {
12154 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
319850b4 12155
845b51d6
PB		 12156 /* Ensure that we have a BX instruction. */
12157 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
319850b4 12158
845b51d6
PB		 12159 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
12160 {
12161 /* Branch to veneer. */
12162 bfd_vma glue_addr;
12163 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
12164 glue_addr -= input_section->output_section->vma
12165 + input_section->output_offset
12166 + rel->r_offset + 8;
12167 insn = (insn & 0xf0000000) | 0x0a000000
12168 | ((glue_addr >> 2) & 0x00ffffff);
12169 }
12170 else
12171 {
12172 /* Preserve Rm (lowest four bits) and the condition code
12173 (highest four bits). Other bits encode MOV PC,Rm. */
12174 insn = (insn & 0xf000000f) | 0x01a0f000;
12175 }
319850b4 12176
845b51d6
PB		 12177 bfd_put_32 (input_bfd, insn, hit_data);
12178 }
319850b4
JB		 12179 return bfd_reloc_ok;
12180
b6895b4f
PB		 12181 case R_ARM_MOVW_ABS_NC:
12182 case R_ARM_MOVT_ABS:
12183 case R_ARM_MOVW_PREL_NC:
12184 case R_ARM_MOVT_PREL:
92f5d02b
MS		 12185 /* Until we properly support segment-base-relative addressing then
12186 we assume the segment base to be zero, as for the group relocations.
12187 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
12188 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
12189 case R_ARM_MOVW_BREL_NC:
12190 case R_ARM_MOVW_BREL:
12191 case R_ARM_MOVT_BREL:
b6895b4f
PB		 12192 {
12193 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
12194
12195 if (globals->use_rel)
12196 {
12197 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
39623e12 12198 signed_addend = (addend ^ 0x8000) - 0x8000;
b6895b4f 12199 }
92f5d02b 12200
b6895b4f 12201 value += signed_addend;
b6895b4f
PB		 12202
12203 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
12204 value -= (input_section->output_section->vma
12205 + input_section->output_offset + rel->r_offset);
12206
92f5d02b 12207 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
99059e56 12208 return bfd_reloc_overflow;
92f5d02b 12209
35fc36a8 12210 if (branch_type == ST_BRANCH_TO_THUMB)
92f5d02b
MS		 12211 value |= 1;
12212
12213 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
99059e56 12214 || r_type == R_ARM_MOVT_BREL)
b6895b4f
PB		 12215 value >>= 16;
12216
12217 insn &= 0xfff0f000;
12218 insn |= value & 0xfff;
12219 insn |= (value & 0xf000) << 4;
12220 bfd_put_32 (input_bfd, insn, hit_data);
12221 }
12222 return bfd_reloc_ok;
12223
12224 case R_ARM_THM_MOVW_ABS_NC:
12225 case R_ARM_THM_MOVT_ABS:
12226 case R_ARM_THM_MOVW_PREL_NC:
12227 case R_ARM_THM_MOVT_PREL:
92f5d02b
MS		 12228 /* Until we properly support segment-base-relative addressing then
12229 we assume the segment base to be zero, as for the above relocations.
12230 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
12231 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
12232 as R_ARM_THM_MOVT_ABS. */
12233 case R_ARM_THM_MOVW_BREL_NC:
12234 case R_ARM_THM_MOVW_BREL:
12235 case R_ARM_THM_MOVT_BREL:
b6895b4f
PB		 12236 {
12237 bfd_vma insn;
906e58ca 12238
b6895b4f
PB		 12239 insn = bfd_get_16 (input_bfd, hit_data) << 16;
12240 insn |= bfd_get_16 (input_bfd, hit_data + 2);
12241
12242 if (globals->use_rel)
12243 {
12244 addend = ((insn >> 4) & 0xf000)
12245 | ((insn >> 15) & 0x0800)
12246 | ((insn >> 4) & 0x0700)
07d6d2b8 12247 | (insn & 0x00ff);
39623e12 12248 signed_addend = (addend ^ 0x8000) - 0x8000;
b6895b4f 12249 }
92f5d02b 12250
b6895b4f 12251 value += signed_addend;
b6895b4f
PB		 12252
12253 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
12254 value -= (input_section->output_section->vma
12255 + input_section->output_offset + rel->r_offset);
12256
92f5d02b 12257 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
99059e56 12258 return bfd_reloc_overflow;
92f5d02b 12259
35fc36a8 12260 if (branch_type == ST_BRANCH_TO_THUMB)
92f5d02b
MS		 12261 value |= 1;
12262
12263 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
99059e56 12264 || r_type == R_ARM_THM_MOVT_BREL)
b6895b4f
PB		 12265 value >>= 16;
12266
12267 insn &= 0xfbf08f00;
12268 insn |= (value & 0xf000) << 4;
12269 insn |= (value & 0x0800) << 15;
12270 insn |= (value & 0x0700) << 4;
12271 insn |= (value & 0x00ff);
12272
12273 bfd_put_16 (input_bfd, insn >> 16, hit_data);
12274 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
12275 }
12276 return bfd_reloc_ok;
12277
4962c51a
MS		 12278 case R_ARM_ALU_PC_G0_NC:
12279 case R_ARM_ALU_PC_G1_NC:
12280 case R_ARM_ALU_PC_G0:
12281 case R_ARM_ALU_PC_G1:
12282 case R_ARM_ALU_PC_G2:
12283 case R_ARM_ALU_SB_G0_NC:
12284 case R_ARM_ALU_SB_G1_NC:
12285 case R_ARM_ALU_SB_G0:
12286 case R_ARM_ALU_SB_G1:
12287 case R_ARM_ALU_SB_G2:
12288 {
12289 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
99059e56 12290 bfd_vma pc = input_section->output_section->vma
4962c51a 12291 + input_section->output_offset + rel->r_offset;
31a91d61 12292 /* sb is the origin of the *segment* containing the symbol. */
62c34db3 12293 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
99059e56
RM		 12294 bfd_vma residual;
12295 bfd_vma g_n;
4962c51a 12296 bfd_signed_vma signed_value;
99059e56
RM		 12297 int group = 0;
12298
12299 /* Determine which group of bits to select. */
12300 switch (r_type)
12301 {
12302 case R_ARM_ALU_PC_G0_NC:
12303 case R_ARM_ALU_PC_G0:
12304 case R_ARM_ALU_SB_G0_NC:
12305 case R_ARM_ALU_SB_G0:
12306 group = 0;
12307 break;
12308
12309 case R_ARM_ALU_PC_G1_NC:
12310 case R_ARM_ALU_PC_G1:
12311 case R_ARM_ALU_SB_G1_NC:
12312 case R_ARM_ALU_SB_G1:
12313 group = 1;
12314 break;
12315
12316 case R_ARM_ALU_PC_G2:
12317 case R_ARM_ALU_SB_G2:
12318 group = 2;
12319 break;
12320
12321 default:
12322 abort ();
12323 }
12324
12325 /* If REL, extract the addend from the insn. If RELA, it will
12326 have already been fetched for us. */
4962c51a 12327 if (globals->use_rel)
99059e56
RM		 12328 {
12329 int negative;
12330 bfd_vma constant = insn & 0xff;
12331 bfd_vma rotation = (insn & 0xf00) >> 8;
12332
12333 if (rotation == 0)
12334 signed_addend = constant;
12335 else
12336 {
12337 /* Compensate for the fact that in the instruction, the
12338 rotation is stored in multiples of 2 bits. */
12339 rotation *= 2;
12340
12341 /* Rotate "constant" right by "rotation" bits. */
12342 signed_addend = (constant >> rotation) |
12343 (constant << (8 * sizeof (bfd_vma) - rotation));
12344 }
12345
12346 /* Determine if the instruction is an ADD or a SUB.
12347 (For REL, this determines the sign of the addend.) */
12348 negative = identify_add_or_sub (insn);
12349 if (negative == 0)
12350 {
4eca0228 12351 _bfd_error_handler
695344c0 12352 /* xgettext:c-format */
90b6238f 12353 (_("%pB(%pA+%#" PRIx64 "): only ADD or SUB instructions "
2dcf00ce
AM		 12354 "are allowed for ALU group relocations"),
12355 input_bfd, input_section, (uint64_t) rel->r_offset);
99059e56
RM		 12356 return bfd_reloc_overflow;
12357 }
12358
12359 signed_addend *= negative;
12360 }
4962c51a
MS		 12361
12362 /* Compute the value (X) to go in the place. */
99059e56
RM		 12363 if (r_type == R_ARM_ALU_PC_G0_NC
12364 || r_type == R_ARM_ALU_PC_G1_NC
12365 || r_type == R_ARM_ALU_PC_G0
12366 || r_type == R_ARM_ALU_PC_G1
12367 || r_type == R_ARM_ALU_PC_G2)
12368 /* PC relative. */
12369 signed_value = value - pc + signed_addend;
12370 else
12371 /* Section base relative. */
12372 signed_value = value - sb + signed_addend;
12373
12374 /* If the target symbol is a Thumb function, then set the
12375 Thumb bit in the address. */
35fc36a8 12376 if (branch_type == ST_BRANCH_TO_THUMB)
4962c51a
MS		 12377 signed_value |= 1;
12378
99059e56
RM		 12379 /* Calculate the value of the relevant G_n, in encoded
12380 constant-with-rotation format. */
b6518b38
NC		 12381 g_n = calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
12382 group, &residual);
99059e56
RM		 12383
12384 /* Check for overflow if required. */
12385 if ((r_type == R_ARM_ALU_PC_G0
12386 || r_type == R_ARM_ALU_PC_G1
12387 || r_type == R_ARM_ALU_PC_G2
12388 || r_type == R_ARM_ALU_SB_G0
12389 || r_type == R_ARM_ALU_SB_G1
12390 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
12391 {
4eca0228 12392 _bfd_error_handler
695344c0 12393 /* xgettext:c-format */
90b6238f 12394 (_("%pB(%pA+%#" PRIx64 "): overflow whilst "
2dcf00ce
AM		 12395 "splitting %#" PRIx64 " for group relocation %s"),
12396 input_bfd, input_section, (uint64_t) rel->r_offset,
12397 (uint64_t) (signed_value < 0 ? -signed_value : signed_value),
12398 howto->name);
99059e56
RM		 12399 return bfd_reloc_overflow;
12400 }
12401
12402 /* Mask out the value and the ADD/SUB part of the opcode; take care
12403 not to destroy the S bit. */
12404 insn &= 0xff1ff000;
12405
12406 /* Set the opcode according to whether the value to go in the
12407 place is negative. */
12408 if (signed_value < 0)
12409 insn |= 1 << 22;
12410 else
12411 insn |= 1 << 23;
12412
12413 /* Encode the offset. */
12414 insn |= g_n;
4962c51a
MS		 12415
12416 bfd_put_32 (input_bfd, insn, hit_data);
12417 }
12418 return bfd_reloc_ok;
12419
12420 case R_ARM_LDR_PC_G0:
12421 case R_ARM_LDR_PC_G1:
12422 case R_ARM_LDR_PC_G2:
12423 case R_ARM_LDR_SB_G0:
12424 case R_ARM_LDR_SB_G1:
12425 case R_ARM_LDR_SB_G2:
12426 {
12427 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
99059e56 12428 bfd_vma pc = input_section->output_section->vma
4962c51a 12429 + input_section->output_offset + rel->r_offset;
31a91d61 12430 /* sb is the origin of the *segment* containing the symbol. */
62c34db3 12431 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
99059e56 12432 bfd_vma residual;
4962c51a 12433 bfd_signed_vma signed_value;
99059e56
RM		 12434 int group = 0;
12435
12436 /* Determine which groups of bits to calculate. */
12437 switch (r_type)
12438 {
12439 case R_ARM_LDR_PC_G0:
12440 case R_ARM_LDR_SB_G0:
12441 group = 0;
12442 break;
12443
12444 case R_ARM_LDR_PC_G1:
12445 case R_ARM_LDR_SB_G1:
12446 group = 1;
12447 break;
12448
12449 case R_ARM_LDR_PC_G2:
12450 case R_ARM_LDR_SB_G2:
12451 group = 2;
12452 break;
12453
12454 default:
12455 abort ();
12456 }
12457
12458 /* If REL, extract the addend from the insn. If RELA, it will
12459 have already been fetched for us. */
4962c51a 12460 if (globals->use_rel)
99059e56
RM		 12461 {
12462 int negative = (insn & (1 << 23)) ? 1 : -1;
12463 signed_addend = negative * (insn & 0xfff);
12464 }
4962c51a
MS		 12465
12466 /* Compute the value (X) to go in the place. */
99059e56
RM		 12467 if (r_type == R_ARM_LDR_PC_G0
12468 || r_type == R_ARM_LDR_PC_G1
12469 || r_type == R_ARM_LDR_PC_G2)
12470 /* PC relative. */
12471 signed_value = value - pc + signed_addend;
12472 else
12473 /* Section base relative. */
12474 signed_value = value - sb + signed_addend;
12475
12476 /* Calculate the value of the relevant G_{n-1} to obtain
12477 the residual at that stage. */
b6518b38
NC		 12478 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
12479 group - 1, &residual);
99059e56
RM		 12480
12481 /* Check for overflow. */
12482 if (residual >= 0x1000)
12483 {
4eca0228 12484 _bfd_error_handler
695344c0 12485 /* xgettext:c-format */
90b6238f 12486 (_("%pB(%pA+%#" PRIx64 "): overflow whilst "
2dcf00ce
AM		 12487 "splitting %#" PRIx64 " for group relocation %s"),
12488 input_bfd, input_section, (uint64_t) rel->r_offset,
12489 (uint64_t) (signed_value < 0 ? -signed_value : signed_value),
12490 howto->name);
99059e56
RM		 12491 return bfd_reloc_overflow;
12492 }
12493
12494 /* Mask out the value and U bit. */
12495 insn &= 0xff7ff000;
12496
12497 /* Set the U bit if the value to go in the place is non-negative. */
12498 if (signed_value >= 0)
12499 insn |= 1 << 23;
12500
12501 /* Encode the offset. */
12502 insn |= residual;
4962c51a
MS		 12503
12504 bfd_put_32 (input_bfd, insn, hit_data);
12505 }
12506 return bfd_reloc_ok;
12507
12508 case R_ARM_LDRS_PC_G0:
12509 case R_ARM_LDRS_PC_G1:
12510 case R_ARM_LDRS_PC_G2:
12511 case R_ARM_LDRS_SB_G0:
12512 case R_ARM_LDRS_SB_G1:
12513 case R_ARM_LDRS_SB_G2:
12514 {
12515 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
99059e56 12516 bfd_vma pc = input_section->output_section->vma
4962c51a 12517 + input_section->output_offset + rel->r_offset;
31a91d61 12518 /* sb is the origin of the *segment* containing the symbol. */
62c34db3 12519 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
99059e56 12520 bfd_vma residual;
4962c51a 12521 bfd_signed_vma signed_value;
99059e56
RM		 12522 int group = 0;
12523
12524 /* Determine which groups of bits to calculate. */
12525 switch (r_type)
12526 {
12527 case R_ARM_LDRS_PC_G0:
12528 case R_ARM_LDRS_SB_G0:
12529 group = 0;
12530 break;
12531
12532 case R_ARM_LDRS_PC_G1:
12533 case R_ARM_LDRS_SB_G1:
12534 group = 1;
12535 break;
12536
12537 case R_ARM_LDRS_PC_G2:
12538 case R_ARM_LDRS_SB_G2:
12539 group = 2;
12540 break;
12541
12542 default:
12543 abort ();
12544 }
12545
12546 /* If REL, extract the addend from the insn. If RELA, it will
12547 have already been fetched for us. */
4962c51a 12548 if (globals->use_rel)
99059e56
RM		 12549 {
12550 int negative = (insn & (1 << 23)) ? 1 : -1;
12551 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
12552 }
4962c51a
MS		 12553
12554 /* Compute the value (X) to go in the place. */
99059e56
RM		 12555 if (r_type == R_ARM_LDRS_PC_G0
12556 || r_type == R_ARM_LDRS_PC_G1
12557 || r_type == R_ARM_LDRS_PC_G2)
12558 /* PC relative. */
12559 signed_value = value - pc + signed_addend;
12560 else
12561 /* Section base relative. */
12562 signed_value = value - sb + signed_addend;
12563
12564 /* Calculate the value of the relevant G_{n-1} to obtain
12565 the residual at that stage. */
b6518b38
NC		 12566 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
12567 group - 1, &residual);
99059e56
RM		 12568
12569 /* Check for overflow. */
12570 if (residual >= 0x100)
12571 {
4eca0228 12572 _bfd_error_handler
695344c0 12573 /* xgettext:c-format */
90b6238f 12574 (_("%pB(%pA+%#" PRIx64 "): overflow whilst "
2dcf00ce
AM		 12575 "splitting %#" PRIx64 " for group relocation %s"),
12576 input_bfd, input_section, (uint64_t) rel->r_offset,
12577 (uint64_t) (signed_value < 0 ? -signed_value : signed_value),
12578 howto->name);
99059e56
RM		 12579 return bfd_reloc_overflow;
12580 }
12581
12582 /* Mask out the value and U bit. */
12583 insn &= 0xff7ff0f0;
12584
12585 /* Set the U bit if the value to go in the place is non-negative. */
12586 if (signed_value >= 0)
12587 insn |= 1 << 23;
12588
12589 /* Encode the offset. */
12590 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
4962c51a
MS		 12591
12592 bfd_put_32 (input_bfd, insn, hit_data);
12593 }
12594 return bfd_reloc_ok;
12595
12596 case R_ARM_LDC_PC_G0:
12597 case R_ARM_LDC_PC_G1:
12598 case R_ARM_LDC_PC_G2:
12599 case R_ARM_LDC_SB_G0:
12600 case R_ARM_LDC_SB_G1:
12601 case R_ARM_LDC_SB_G2:
12602 {
12603 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
99059e56 12604 bfd_vma pc = input_section->output_section->vma
4962c51a 12605 + input_section->output_offset + rel->r_offset;
31a91d61 12606 /* sb is the origin of the *segment* containing the symbol. */
62c34db3 12607 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
99059e56 12608 bfd_vma residual;
4962c51a 12609 bfd_signed_vma signed_value;
99059e56
RM		 12610 int group = 0;
12611
12612 /* Determine which groups of bits to calculate. */
12613 switch (r_type)
12614 {
12615 case R_ARM_LDC_PC_G0:
12616 case R_ARM_LDC_SB_G0:
12617 group = 0;
12618 break;
12619
12620 case R_ARM_LDC_PC_G1:
12621 case R_ARM_LDC_SB_G1:
12622 group = 1;
12623 break;
12624
12625 case R_ARM_LDC_PC_G2:
12626 case R_ARM_LDC_SB_G2:
12627 group = 2;
12628 break;
12629
12630 default:
12631 abort ();
12632 }
12633
12634 /* If REL, extract the addend from the insn. If RELA, it will
12635 have already been fetched for us. */
4962c51a 12636 if (globals->use_rel)
99059e56
RM		 12637 {
12638 int negative = (insn & (1 << 23)) ? 1 : -1;
12639 signed_addend = negative * ((insn & 0xff) << 2);
12640 }
4962c51a
MS		 12641
12642 /* Compute the value (X) to go in the place. */
99059e56
RM		 12643 if (r_type == R_ARM_LDC_PC_G0
12644 || r_type == R_ARM_LDC_PC_G1
12645 || r_type == R_ARM_LDC_PC_G2)
12646 /* PC relative. */
12647 signed_value = value - pc + signed_addend;
12648 else
12649 /* Section base relative. */
12650 signed_value = value - sb + signed_addend;
12651
12652 /* Calculate the value of the relevant G_{n-1} to obtain
12653 the residual at that stage. */
b6518b38
NC		 12654 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
12655 group - 1, &residual);
99059e56
RM		 12656
12657 /* Check for overflow. (The absolute value to go in the place must be
12658 divisible by four and, after having been divided by four, must
12659 fit in eight bits.) */
12660 if ((residual & 0x3) != 0 || residual >= 0x400)
12661 {
4eca0228 12662 _bfd_error_handler
695344c0 12663 /* xgettext:c-format */
90b6238f 12664 (_("%pB(%pA+%#" PRIx64 "): overflow whilst "
2dcf00ce
AM		 12665 "splitting %#" PRIx64 " for group relocation %s"),
12666 input_bfd, input_section, (uint64_t) rel->r_offset,
12667 (uint64_t) (signed_value < 0 ? -signed_value : signed_value),
12668 howto->name);
99059e56
RM		 12669 return bfd_reloc_overflow;
12670 }
12671
12672 /* Mask out the value and U bit. */
12673 insn &= 0xff7fff00;
12674
12675 /* Set the U bit if the value to go in the place is non-negative. */
12676 if (signed_value >= 0)
12677 insn |= 1 << 23;
12678
12679 /* Encode the offset. */
12680 insn |= residual >> 2;
4962c51a
MS		 12681
12682 bfd_put_32 (input_bfd, insn, hit_data);
12683 }
12684 return bfd_reloc_ok;
12685
72d98d16
MG		 12686 case R_ARM_THM_ALU_ABS_G0_NC:
12687 case R_ARM_THM_ALU_ABS_G1_NC:
12688 case R_ARM_THM_ALU_ABS_G2_NC:
12689 case R_ARM_THM_ALU_ABS_G3_NC:
12690 {
12691 const int shift_array[4] = {0, 8, 16, 24};
12692 bfd_vma insn = bfd_get_16 (input_bfd, hit_data);
12693 bfd_vma addr = value;
12694 int shift = shift_array[r_type - R_ARM_THM_ALU_ABS_G0_NC];
12695
12696 /* Compute address. */
12697 if (globals->use_rel)
12698 signed_addend = insn & 0xff;
12699 addr += signed_addend;
12700 if (branch_type == ST_BRANCH_TO_THUMB)
12701 addr |= 1;
12702 /* Clean imm8 insn. */
12703 insn &= 0xff00;
12704 /* And update with correct part of address. */
12705 insn |= (addr >> shift) & 0xff;
12706 /* Update insn. */
12707 bfd_put_16 (input_bfd, insn, hit_data);
12708 }
12709
12710 *unresolved_reloc_p = FALSE;
12711 return bfd_reloc_ok;
12712
e8b09b87
CL		 12713 case R_ARM_GOTOFFFUNCDESC:
12714 {
4b24dd1a 12715 if (h == NULL)
e8b09b87
CL		 12716 {
12717 struct fdpic_local *local_fdpic_cnts = elf32_arm_local_fdpic_cnts(input_bfd);
12718 int dynindx = elf_section_data (sym_sec->output_section)->dynindx;
12719 int offset = local_fdpic_cnts[r_symndx].funcdesc_offset & ~1;
12720 bfd_vma addr = dynreloc_value - sym_sec->output_section->vma;
12721 bfd_vma seg = -1;
12722
12723 if (bfd_link_pic(info) && dynindx == 0)
12724 abort();
12725
12726 /* Resolve relocation. */
12727 bfd_put_32(output_bfd, (offset + sgot->output_offset)
12728 , contents + rel->r_offset);
12729 /* Emit R_ARM_FUNCDESC_VALUE or two fixups on funcdesc if
12730 not done yet. */
12731 arm_elf_fill_funcdesc(output_bfd, info,
12732 &local_fdpic_cnts[r_symndx].funcdesc_offset,
12733 dynindx, offset, addr, dynreloc_value, seg);
12734 }
12735 else
12736 {
12737 int dynindx;
12738 int offset = eh->fdpic_cnts.funcdesc_offset & ~1;
12739 bfd_vma addr;
12740 bfd_vma seg = -1;
12741
12742 /* For static binaries, sym_sec can be null. */
12743 if (sym_sec)
12744 {
12745 dynindx = elf_section_data (sym_sec->output_section)->dynindx;
12746 addr = dynreloc_value - sym_sec->output_section->vma;
12747 }
12748 else
12749 {
12750 dynindx = 0;
12751 addr = 0;
12752 }
12753
12754 if (bfd_link_pic(info) && dynindx == 0)
12755 abort();
12756
12757 /* This case cannot occur since funcdesc is allocated by
12758 the dynamic loader so we cannot resolve the relocation. */
12759 if (h->dynindx != -1)
12760 abort();
12761
12762 /* Resolve relocation. */
12763 bfd_put_32(output_bfd, (offset + sgot->output_offset),
12764 contents + rel->r_offset);
12765 /* Emit R_ARM_FUNCDESC_VALUE on funcdesc if not done yet. */
12766 arm_elf_fill_funcdesc(output_bfd, info,
12767 &eh->fdpic_cnts.funcdesc_offset,
12768 dynindx, offset, addr, dynreloc_value, seg);
12769 }
12770 }
12771 *unresolved_reloc_p = FALSE;
12772 return bfd_reloc_ok;
12773
12774 case R_ARM_GOTFUNCDESC:
12775 {
4b24dd1a 12776 if (h != NULL)
e8b09b87
CL		 12777 {
12778 Elf_Internal_Rela outrel;
12779
12780 /* Resolve relocation. */
12781 bfd_put_32(output_bfd, ((eh->fdpic_cnts.gotfuncdesc_offset & ~1)
12782 + sgot->output_offset),
12783 contents + rel->r_offset);
12784 /* Add funcdesc and associated R_ARM_FUNCDESC_VALUE. */
12785 if(h->dynindx == -1)
12786 {
12787 int dynindx;
12788 int offset = eh->fdpic_cnts.funcdesc_offset & ~1;
12789 bfd_vma addr;
12790 bfd_vma seg = -1;
12791
12792 /* For static binaries sym_sec can be null. */
12793 if (sym_sec)
12794 {
12795 dynindx = elf_section_data (sym_sec->output_section)->dynindx;
12796 addr = dynreloc_value - sym_sec->output_section->vma;
12797 }
12798 else
12799 {
12800 dynindx = 0;
12801 addr = 0;
12802 }
12803
12804 /* Emit R_ARM_FUNCDESC_VALUE on funcdesc if not done yet. */
12805 arm_elf_fill_funcdesc(output_bfd, info,
12806 &eh->fdpic_cnts.funcdesc_offset,
12807 dynindx, offset, addr, dynreloc_value, seg);
12808 }
12809
12810 /* Add a dynamic relocation on GOT entry if not already done. */
12811 if ((eh->fdpic_cnts.gotfuncdesc_offset & 1) == 0)
12812 {
12813 if (h->dynindx == -1)
12814 {
12815 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
12816 if (h->root.type == bfd_link_hash_undefweak)
12817 bfd_put_32(output_bfd, 0, sgot->contents
12818 + (eh->fdpic_cnts.gotfuncdesc_offset & ~1));
12819 else
12820 bfd_put_32(output_bfd, sgot->output_section->vma
12821 + sgot->output_offset
12822 + (eh->fdpic_cnts.funcdesc_offset & ~1),
12823 sgot->contents
12824 + (eh->fdpic_cnts.gotfuncdesc_offset & ~1));
12825 }
12826 else
12827 {
12828 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_FUNCDESC);
12829 }
12830 outrel.r_offset = sgot->output_section->vma
12831 + sgot->output_offset
12832 + (eh->fdpic_cnts.gotfuncdesc_offset & ~1);
12833 outrel.r_addend = 0;
12834 if (h->dynindx == -1 && !bfd_link_pic(info))
12835 if (h->root.type == bfd_link_hash_undefweak)
4b24dd1a 12836 arm_elf_add_rofixup(output_bfd, globals->srofixup, -1);
e8b09b87 12837 else
4b24dd1a
AM		 12838 arm_elf_add_rofixup(output_bfd, globals->srofixup,
12839 outrel.r_offset);
e8b09b87
CL		 12840 else
12841 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
12842 eh->fdpic_cnts.gotfuncdesc_offset |= 1;
12843 }
12844 }
12845 else
12846 {
12847 /* Such relocation on static function should not have been
12848 emitted by the compiler. */
12849 abort();
12850 }
12851 }
12852 *unresolved_reloc_p = FALSE;
12853 return bfd_reloc_ok;
12854
12855 case R_ARM_FUNCDESC:
12856 {
4b24dd1a 12857 if (h == NULL)
e8b09b87
CL		 12858 {
12859 struct fdpic_local *local_fdpic_cnts = elf32_arm_local_fdpic_cnts(input_bfd);
12860 Elf_Internal_Rela outrel;
12861 int dynindx = elf_section_data (sym_sec->output_section)->dynindx;
12862 int offset = local_fdpic_cnts[r_symndx].funcdesc_offset & ~1;
12863 bfd_vma addr = dynreloc_value - sym_sec->output_section->vma;
12864 bfd_vma seg = -1;
12865
12866 if (bfd_link_pic(info) && dynindx == 0)
12867 abort();
12868
12869 /* Replace static FUNCDESC relocation with a
12870 R_ARM_RELATIVE dynamic relocation or with a rofixup for
12871 executable. */
12872 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
12873 outrel.r_offset = input_section->output_section->vma
12874 + input_section->output_offset + rel->r_offset;
12875 outrel.r_addend = 0;
12876 if (bfd_link_pic(info))
12877 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
12878 else
12879 arm_elf_add_rofixup(output_bfd, globals->srofixup, outrel.r_offset);
12880
12881 bfd_put_32 (input_bfd, sgot->output_section->vma
12882 + sgot->output_offset + offset, hit_data);
12883
12884 /* Emit R_ARM_FUNCDESC_VALUE on funcdesc if not done yet. */
12885 arm_elf_fill_funcdesc(output_bfd, info,
12886 &local_fdpic_cnts[r_symndx].funcdesc_offset,
12887 dynindx, offset, addr, dynreloc_value, seg);
12888 }
12889 else
12890 {
12891 if (h->dynindx == -1)
12892 {
12893 int dynindx;
12894 int offset = eh->fdpic_cnts.funcdesc_offset & ~1;
12895 bfd_vma addr;
12896 bfd_vma seg = -1;
12897 Elf_Internal_Rela outrel;
12898
12899 /* For static binaries sym_sec can be null. */
12900 if (sym_sec)
12901 {
12902 dynindx = elf_section_data (sym_sec->output_section)->dynindx;
12903 addr = dynreloc_value - sym_sec->output_section->vma;
12904 }
12905 else
12906 {
12907 dynindx = 0;
12908 addr = 0;
12909 }
12910
12911 if (bfd_link_pic(info) && dynindx == 0)
12912 abort();
12913
12914 /* Replace static FUNCDESC relocation with a
12915 R_ARM_RELATIVE dynamic relocation. */
12916 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
12917 outrel.r_offset = input_section->output_section->vma
12918 + input_section->output_offset + rel->r_offset;
12919 outrel.r_addend = 0;
12920 if (bfd_link_pic(info))
12921 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
12922 else
12923 arm_elf_add_rofixup(output_bfd, globals->srofixup, outrel.r_offset);
12924
12925 bfd_put_32 (input_bfd, sgot->output_section->vma
12926 + sgot->output_offset + offset, hit_data);
12927
12928 /* Emit R_ARM_FUNCDESC_VALUE on funcdesc if not done yet. */
12929 arm_elf_fill_funcdesc(output_bfd, info,
12930 &eh->fdpic_cnts.funcdesc_offset,
12931 dynindx, offset, addr, dynreloc_value, seg);
12932 }
12933 else
12934 {
12935 Elf_Internal_Rela outrel;
12936
12937 /* Add a dynamic relocation. */
12938 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_FUNCDESC);
12939 outrel.r_offset = input_section->output_section->vma
12940 + input_section->output_offset + rel->r_offset;
12941 outrel.r_addend = 0;
12942 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
12943 }
12944 }
12945 }
12946 *unresolved_reloc_p = FALSE;
12947 return bfd_reloc_ok;
12948
e5d6e09e
AV		 12949 case R_ARM_THM_BF16:
12950 {
12951 bfd_vma relocation;
12952 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
12953 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
12954
12955 if (globals->use_rel)
12956 {
12957 bfd_vma immA = (upper_insn & 0x001f);
12958 bfd_vma immB = (lower_insn & 0x07fe) >> 1;
12959 bfd_vma immC = (lower_insn & 0x0800) >> 11;
12960 addend = (immA << 12);
12961 addend |= (immB << 2);
12962 addend |= (immC << 1);
12963 addend |= 1;
12964 /* Sign extend. */
e6f65e75 12965 signed_addend = (addend & 0x10000) ? addend - (1 << 17) : addend;
e5d6e09e
AV		 12966 }
12967
e6f65e75 12968 relocation = value + signed_addend;
e5d6e09e
AV		 12969 relocation -= (input_section->output_section->vma
12970 + input_section->output_offset
12971 + rel->r_offset);
12972
12973 /* Put RELOCATION back into the insn. */
12974 {
12975 bfd_vma immA = (relocation & 0x0001f000) >> 12;
12976 bfd_vma immB = (relocation & 0x00000ffc) >> 2;
12977 bfd_vma immC = (relocation & 0x00000002) >> 1;
12978
12979 upper_insn = (upper_insn & 0xffe0) | immA;
12980 lower_insn = (lower_insn & 0xf001) | (immC << 11) | (immB << 1);
12981 }
12982
12983 /* Put the relocated value back in the object file: */
12984 bfd_put_16 (input_bfd, upper_insn, hit_data);
12985 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
12986
12987 return bfd_reloc_ok;
12988 }
12989
1889da70
AV		 12990 case R_ARM_THM_BF12:
12991 {
12992 bfd_vma relocation;
12993 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
12994 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
12995
12996 if (globals->use_rel)
12997 {
12998 bfd_vma immA = (upper_insn & 0x0001);
12999 bfd_vma immB = (lower_insn & 0x07fe) >> 1;
13000 bfd_vma immC = (lower_insn & 0x0800) >> 11;
13001 addend = (immA << 12);
13002 addend |= (immB << 2);
13003 addend |= (immC << 1);
13004 addend |= 1;
13005 /* Sign extend. */
13006 addend = (addend & 0x1000) ? addend - (1 << 13) : addend;
e6f65e75 13007 signed_addend = addend;
1889da70
AV		 13008 }
13009
e6f65e75 13010 relocation = value + signed_addend;
1889da70
AV		 13011 relocation -= (input_section->output_section->vma
13012 + input_section->output_offset
13013 + rel->r_offset);
13014
13015 /* Put RELOCATION back into the insn. */
13016 {
13017 bfd_vma immA = (relocation & 0x00001000) >> 12;
13018 bfd_vma immB = (relocation & 0x00000ffc) >> 2;
13019 bfd_vma immC = (relocation & 0x00000002) >> 1;
13020
13021 upper_insn = (upper_insn & 0xfffe) | immA;
13022 lower_insn = (lower_insn & 0xf001) | (immC << 11) | (immB << 1);
13023 }
13024
13025 /* Put the relocated value back in the object file: */
13026 bfd_put_16 (input_bfd, upper_insn, hit_data);
13027 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
13028
13029 return bfd_reloc_ok;
13030 }
13031
1caf72a5
AV		 13032 case R_ARM_THM_BF18:
13033 {
13034 bfd_vma relocation;
13035 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
13036 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
13037
13038 if (globals->use_rel)
13039 {
13040 bfd_vma immA = (upper_insn & 0x007f);
13041 bfd_vma immB = (lower_insn & 0x07fe) >> 1;
13042 bfd_vma immC = (lower_insn & 0x0800) >> 11;
13043 addend = (immA << 12);
13044 addend |= (immB << 2);
13045 addend |= (immC << 1);
13046 addend |= 1;
13047 /* Sign extend. */
13048 addend = (addend & 0x40000) ? addend - (1 << 19) : addend;
e6f65e75 13049 signed_addend = addend;
1caf72a5
AV		 13050 }
13051
e6f65e75 13052 relocation = value + signed_addend;
1caf72a5
AV		 13053 relocation -= (input_section->output_section->vma
13054 + input_section->output_offset
13055 + rel->r_offset);
13056
13057 /* Put RELOCATION back into the insn. */
13058 {
13059 bfd_vma immA = (relocation & 0x0007f000) >> 12;
13060 bfd_vma immB = (relocation & 0x00000ffc) >> 2;
13061 bfd_vma immC = (relocation & 0x00000002) >> 1;
13062
13063 upper_insn = (upper_insn & 0xff80) | immA;
13064 lower_insn = (lower_insn & 0xf001) | (immC << 11) | (immB << 1);
13065 }
13066
13067 /* Put the relocated value back in the object file: */
13068 bfd_put_16 (input_bfd, upper_insn, hit_data);
13069 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
13070
13071 return bfd_reloc_ok;
13072 }
13073
252b5132
RH		 13074 default:
13075 return bfd_reloc_notsupported;
13076 }
13077}
13078
98c1d4aa
NC		 13079/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
13080static void
07d6d2b8
AM		 13081arm_add_to_rel (bfd * abfd,
13082 bfd_byte * address,
57e8b36a 13083 reloc_howto_type * howto,
07d6d2b8 13084 bfd_signed_vma increment)
98c1d4aa 13085{
98c1d4aa
NC		 13086 bfd_signed_vma addend;
13087
bd97cb95
DJ		 13088 if (howto->type == R_ARM_THM_CALL
13089 || howto->type == R_ARM_THM_JUMP24)
98c1d4aa 13090 {
9a5aca8c
AM		 13091 int upper_insn, lower_insn;
13092 int upper, lower;
98c1d4aa 13093
9a5aca8c
AM		 13094 upper_insn = bfd_get_16 (abfd, address);
13095 lower_insn = bfd_get_16 (abfd, address + 2);
13096 upper = upper_insn & 0x7ff;
13097 lower = lower_insn & 0x7ff;
13098
13099 addend = (upper << 12) | (lower << 1);
ddda4409 13100 addend += increment;
9a5aca8c 13101 addend >>= 1;
98c1d4aa 13102
9a5aca8c
AM		 13103 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
13104 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
13105
dc810e39
AM		 13106 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
13107 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9a5aca8c
AM		 13108 }
13109 else
13110 {
07d6d2b8 13111 bfd_vma contents;
9a5aca8c
AM		 13112
13113 contents = bfd_get_32 (abfd, address);
13114
13115 /* Get the (signed) value from the instruction. */
13116 addend = contents & howto->src_mask;
13117 if (addend & ((howto->src_mask + 1) >> 1))
13118 {
13119 bfd_signed_vma mask;
13120
13121 mask = -1;
13122 mask &= ~ howto->src_mask;
13123 addend |= mask;
13124 }
13125
13126 /* Add in the increment, (which is a byte value). */
13127 switch (howto->type)
13128 {
13129 default:
13130 addend += increment;
13131 break;
13132
13133 case R_ARM_PC24:
c6596c5e 13134 case R_ARM_PLT32:
5b5bb741
PB		 13135 case R_ARM_CALL:
13136 case R_ARM_JUMP24:
9a5aca8c 13137 addend <<= howto->size;
dc810e39 13138 addend += increment;
9a5aca8c
AM		 13139
13140 /* Should we check for overflow here ? */
13141
13142 /* Drop any undesired bits. */
13143 addend >>= howto->rightshift;
13144 break;
13145 }
13146
13147 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
13148
13149 bfd_put_32 (abfd, contents, address);
ddda4409 13150 }
98c1d4aa 13151}
252b5132 13152
ba93b8ac
DJ		 13153#define IS_ARM_TLS_RELOC(R_TYPE) \
13154 ((R_TYPE) == R_ARM_TLS_GD32 \
5c5a4843 13155 || (R_TYPE) == R_ARM_TLS_GD32_FDPIC \
ba93b8ac
DJ		 13156 || (R_TYPE) == R_ARM_TLS_LDO32 \
13157 || (R_TYPE) == R_ARM_TLS_LDM32 \
5c5a4843 13158 || (R_TYPE) == R_ARM_TLS_LDM32_FDPIC \
ba93b8ac
DJ		 13159 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
13160 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
13161 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
13162 || (R_TYPE) == R_ARM_TLS_LE32 \
0855e32b 13163 || (R_TYPE) == R_ARM_TLS_IE32 \
5c5a4843 13164 || (R_TYPE) == R_ARM_TLS_IE32_FDPIC \
0855e32b
NS		 13165 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
13166
13167/* Specific set of relocations for the gnu tls dialect. */
13168#define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
13169 ((R_TYPE) == R_ARM_TLS_GOTDESC \
13170 || (R_TYPE) == R_ARM_TLS_CALL \
13171 || (R_TYPE) == R_ARM_THM_TLS_CALL \
13172 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
13173 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
ba93b8ac 13174
252b5132 13175/* Relocate an ARM ELF section. */
906e58ca 13176
b34976b6 13177static bfd_boolean
07d6d2b8 13178elf32_arm_relocate_section (bfd * output_bfd,
57e8b36a 13179 struct bfd_link_info * info,
07d6d2b8
AM		 13180 bfd * input_bfd,
13181 asection * input_section,
13182 bfd_byte * contents,
13183 Elf_Internal_Rela * relocs,
13184 Elf_Internal_Sym * local_syms,
13185 asection ** local_sections)
252b5132 13186{
b34976b6
AM		 13187 Elf_Internal_Shdr *symtab_hdr;
13188 struct elf_link_hash_entry **sym_hashes;
13189 Elf_Internal_Rela *rel;
13190 Elf_Internal_Rela *relend;
13191 const char *name;
b32d3aa2 13192 struct elf32_arm_link_hash_table * globals;
252b5132 13193
4e7fd91e 13194 globals = elf32_arm_hash_table (info);
4dfe6ac6
NC		 13195 if (globals == NULL)
13196 return FALSE;
b491616a 13197
0ffa91dd 13198 symtab_hdr = & elf_symtab_hdr (input_bfd);
252b5132
RH		 13199 sym_hashes = elf_sym_hashes (input_bfd);
13200
13201 rel = relocs;
13202 relend = relocs + input_section->reloc_count;
13203 for (; rel < relend; rel++)
13204 {
07d6d2b8
AM		 13205 int r_type;
13206 reloc_howto_type * howto;
13207 unsigned long r_symndx;
13208 Elf_Internal_Sym * sym;
13209 asection * sec;
252b5132 13210 struct elf_link_hash_entry * h;
07d6d2b8
AM		 13211 bfd_vma relocation;
13212 bfd_reloc_status_type r;
13213 arelent bfd_reloc;
13214 char sym_type;
13215 bfd_boolean unresolved_reloc = FALSE;
f2a9dd69 13216 char *error_message = NULL;
f21f3fe0 13217
252b5132 13218 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 13219 r_type = ELF32_R_TYPE (rel->r_info);
b32d3aa2 13220 r_type = arm_real_reloc_type (globals, r_type);
252b5132 13221
ba96a88f 13222 if ( r_type == R_ARM_GNU_VTENTRY
99059e56
RM		 13223 || r_type == R_ARM_GNU_VTINHERIT)
13224 continue;
252b5132 13225
47aeb64c
NC		 13226 howto = bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
13227
13228 if (howto == NULL)
13229 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
252b5132 13230
252b5132
RH		 13231 h = NULL;
13232 sym = NULL;
13233 sec = NULL;
9b485d32 13234
252b5132
RH		 13235 if (r_symndx < symtab_hdr->sh_info)
13236 {
13237 sym = local_syms + r_symndx;
ba93b8ac 13238 sym_type = ELF32_ST_TYPE (sym->st_info);
252b5132 13239 sec = local_sections[r_symndx];
ffcb4889
NS		 13240
13241 /* An object file might have a reference to a local
13242 undefined symbol. This is a daft object file, but we
13243 should at least do something about it. V4BX & NONE
13244 relocations do not use the symbol and are explicitly
77b4f08f
TS		 13245 allowed to use the undefined symbol, so allow those.
13246 Likewise for relocations against STN_UNDEF. */
ffcb4889
NS		 13247 if (r_type != R_ARM_V4BX
13248 && r_type != R_ARM_NONE
77b4f08f 13249 && r_symndx != STN_UNDEF
ffcb4889
NS		 13250 && bfd_is_und_section (sec)
13251 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
1a72702b
AM		 13252 (*info->callbacks->undefined_symbol)
13253 (info, bfd_elf_string_from_elf_section
13254 (input_bfd, symtab_hdr->sh_link, sym->st_name),
13255 input_bfd, input_section,
13256 rel->r_offset, TRUE);
b38cadfb 13257
4e7fd91e 13258 if (globals->use_rel)
f8df10f4 13259 {
4e7fd91e
PB		 13260 relocation = (sec->output_section->vma
13261 + sec->output_offset
13262 + sym->st_value);
0e1862bb 13263 if (!bfd_link_relocatable (info)
ab96bf03
AM		 13264 && (sec->flags & SEC_MERGE)
13265 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
f8df10f4 13266 {
4e7fd91e
PB		 13267 asection *msec;
13268 bfd_vma addend, value;
13269
39623e12 13270 switch (r_type)
4e7fd91e 13271 {
39623e12
PB		 13272 case R_ARM_MOVW_ABS_NC:
13273 case R_ARM_MOVT_ABS:
13274 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
13275 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
13276 addend = (addend ^ 0x8000) - 0x8000;
13277 break;
f8df10f4 13278
39623e12
PB		 13279 case R_ARM_THM_MOVW_ABS_NC:
13280 case R_ARM_THM_MOVT_ABS:
13281 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
13282 << 16;
13283 value |= bfd_get_16 (input_bfd,
13284 contents + rel->r_offset + 2);
13285 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
13286 | ((value & 0x04000000) >> 15);
13287 addend = (addend ^ 0x8000) - 0x8000;
13288 break;
f8df10f4 13289
39623e12
PB		 13290 default:
13291 if (howto->rightshift
13292 || (howto->src_mask & (howto->src_mask + 1)))
13293 {
4eca0228 13294 _bfd_error_handler
695344c0 13295 /* xgettext:c-format */
2dcf00ce
AM		 13296 (_("%pB(%pA+%#" PRIx64 "): "
13297 "%s relocation against SEC_MERGE section"),
39623e12 13298 input_bfd, input_section,
2dcf00ce 13299 (uint64_t) rel->r_offset, howto->name);
39623e12
PB		 13300 return FALSE;
13301 }
13302
13303 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
13304
13305 /* Get the (signed) value from the instruction. */
13306 addend = value & howto->src_mask;
13307 if (addend & ((howto->src_mask + 1) >> 1))
13308 {
13309 bfd_signed_vma mask;
13310
13311 mask = -1;
13312 mask &= ~ howto->src_mask;
13313 addend |= mask;
13314 }
13315 break;
4e7fd91e 13316 }
39623e12 13317
4e7fd91e
PB		 13318 msec = sec;
13319 addend =
13320 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
13321 - relocation;
13322 addend += msec->output_section->vma + msec->output_offset;
39623e12 13323
cc643b88 13324 /* Cases here must match those in the preceding
39623e12
PB		 13325 switch statement. */
13326 switch (r_type)
13327 {
13328 case R_ARM_MOVW_ABS_NC:
13329 case R_ARM_MOVT_ABS:
13330 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
13331 | (addend & 0xfff);
13332 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
13333 break;
13334
13335 case R_ARM_THM_MOVW_ABS_NC:
13336 case R_ARM_THM_MOVT_ABS:
13337 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
13338 | (addend & 0xff) | ((addend & 0x0800) << 15);
13339 bfd_put_16 (input_bfd, value >> 16,
13340 contents + rel->r_offset);
13341 bfd_put_16 (input_bfd, value,
13342 contents + rel->r_offset + 2);
13343 break;
13344
13345 default:
13346 value = (value & ~ howto->dst_mask)
13347 | (addend & howto->dst_mask);
13348 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
13349 break;
13350 }
f8df10f4 13351 }
f8df10f4 13352 }
4e7fd91e
PB		 13353 else
13354 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
252b5132
RH		 13355 }
13356 else
13357 {
62d887d4 13358 bfd_boolean warned, ignored;
560e09e9 13359
b2a8e766
AM		 13360 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13361 r_symndx, symtab_hdr, sym_hashes,
13362 h, sec, relocation,
62d887d4 13363 unresolved_reloc, warned, ignored);
ba93b8ac
DJ		 13364
13365 sym_type = h->type;
252b5132
RH		 13366 }
13367
dbaa2011 13368 if (sec != NULL && discarded_section (sec))
e4067dbb 13369 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 13370 rel, 1, relend, howto, 0, contents);
ab96bf03 13371
0e1862bb 13372 if (bfd_link_relocatable (info))
ab96bf03
AM		 13373 {
13374 /* This is a relocatable link. We don't have to change
13375 anything, unless the reloc is against a section symbol,
13376 in which case we have to adjust according to where the
13377 section symbol winds up in the output section. */
13378 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13379 {
13380 if (globals->use_rel)
13381 arm_add_to_rel (input_bfd, contents + rel->r_offset,
13382 howto, (bfd_signed_vma) sec->output_offset);
13383 else
13384 rel->r_addend += sec->output_offset;
13385 }
13386 continue;
13387 }
13388
252b5132
RH		 13389 if (h != NULL)
13390 name = h->root.root.string;
13391 else
13392 {
13393 name = (bfd_elf_string_from_elf_section
13394 (input_bfd, symtab_hdr->sh_link, sym->st_name));
13395 if (name == NULL || *name == '\0')
fd361982 13396 name = bfd_section_name (sec);
252b5132 13397 }
f21f3fe0 13398
cf35638d 13399 if (r_symndx != STN_UNDEF
ba93b8ac
DJ		 13400 && r_type != R_ARM_NONE
13401 && (h == NULL
13402 || h->root.type == bfd_link_hash_defined
13403 || h->root.type == bfd_link_hash_defweak)
13404 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
13405 {
4eca0228 13406 _bfd_error_handler
ba93b8ac 13407 ((sym_type == STT_TLS
695344c0 13408 /* xgettext:c-format */
2dcf00ce 13409 ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s")
695344c0 13410 /* xgettext:c-format */
2dcf00ce 13411 : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")),
ba93b8ac
DJ		 13412 input_bfd,
13413 input_section,
2dcf00ce 13414 (uint64_t) rel->r_offset,
ba93b8ac
DJ		 13415 howto->name,
13416 name);
13417 }
13418
0855e32b 13419 /* We call elf32_arm_final_link_relocate unless we're completely
99059e56
RM		 13420 done, i.e., the relaxation produced the final output we want,
13421 and we won't let anybody mess with it. Also, we have to do
13422 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
6a631e86 13423 both in relaxed and non-relaxed cases. */
39d911fc
TP		 13424 if ((elf32_arm_tls_transition (info, r_type, h) != (unsigned)r_type)
13425 || (IS_ARM_TLS_GNU_RELOC (r_type)
13426 && !((h ? elf32_arm_hash_entry (h)->tls_type :
13427 elf32_arm_local_got_tls_type (input_bfd)[r_symndx])
13428 & GOT_TLS_GDESC)))
13429 {
13430 r = elf32_arm_tls_relax (globals, input_bfd, input_section,
13431 contents, rel, h == NULL);
13432 /* This may have been marked unresolved because it came from
13433 a shared library. But we've just dealt with that. */
13434 unresolved_reloc = 0;
13435 }
13436 else
13437 r = bfd_reloc_continue;
b38cadfb 13438
39d911fc
TP		 13439 if (r == bfd_reloc_continue)
13440 {
13441 unsigned char branch_type =
13442 h ? ARM_GET_SYM_BRANCH_TYPE (h->target_internal)
13443 : ARM_GET_SYM_BRANCH_TYPE (sym->st_target_internal);
13444
13445 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
13446 input_section, contents, rel,
13447 relocation, info, sec, name,
13448 sym_type, branch_type, h,
13449 &unresolved_reloc,
13450 &error_message);
13451 }
0945cdfd
DJ		 13452
13453 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13454 because such sections are not SEC_ALLOC and thus ld.so will
13455 not process them. */
13456 if (unresolved_reloc
99059e56
RM		 13457 && !((input_section->flags & SEC_DEBUGGING) != 0
13458 && h->def_dynamic)
1d5316ab
AM		 13459 && _bfd_elf_section_offset (output_bfd, info, input_section,
13460 rel->r_offset) != (bfd_vma) -1)
0945cdfd 13461 {
4eca0228 13462 _bfd_error_handler
695344c0 13463 /* xgettext:c-format */
2dcf00ce
AM		 13464 (_("%pB(%pA+%#" PRIx64 "): "
13465 "unresolvable %s relocation against symbol `%s'"),
843fe662
L		 13466 input_bfd,
13467 input_section,
2dcf00ce 13468 (uint64_t) rel->r_offset,
843fe662
L		 13469 howto->name,
13470 h->root.root.string);
0945cdfd
DJ		 13471 return FALSE;
13472 }
252b5132
RH		 13473
13474 if (r != bfd_reloc_ok)
13475 {
252b5132
RH		 13476 switch (r)
13477 {
13478 case bfd_reloc_overflow:
cf919dfd
PB		 13479 /* If the overflowing reloc was to an undefined symbol,
13480 we have already printed one error message and there
13481 is no point complaining again. */
1a72702b
AM		 13482 if (!h || h->root.type != bfd_link_hash_undefined)
13483 (*info->callbacks->reloc_overflow)
13484 (info, (h ? &h->root : NULL), name, howto->name,
13485 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
252b5132
RH		 13486 break;
13487
13488 case bfd_reloc_undefined:
1a72702b
AM		 13489 (*info->callbacks->undefined_symbol)
13490 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
252b5132
RH		 13491 break;
13492
13493 case bfd_reloc_outofrange:
f2a9dd69 13494 error_message = _("out of range");
252b5132
RH		 13495 goto common_error;
13496
13497 case bfd_reloc_notsupported:
f2a9dd69 13498 error_message = _("unsupported relocation");
252b5132
RH		 13499 goto common_error;
13500
13501 case bfd_reloc_dangerous:
f2a9dd69 13502 /* error_message should already be set. */
252b5132
RH		 13503 goto common_error;
13504
13505 default:
f2a9dd69 13506 error_message = _("unknown error");
8029a119 13507 /* Fall through. */
252b5132
RH		 13508
13509 common_error:
f2a9dd69 13510 BFD_ASSERT (error_message != NULL);
1a72702b
AM		 13511 (*info->callbacks->reloc_dangerous)
13512 (info, error_message, input_bfd, input_section, rel->r_offset);
252b5132
RH		 13513 break;
13514 }
13515 }
13516 }
13517
b34976b6 13518 return TRUE;
252b5132
RH		 13519}
13520
91d6fa6a 13521/* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
2468f9c9 13522 adds the edit to the start of the list. (The list must be built in order of
91d6fa6a 13523 ascending TINDEX: the function's callers are primarily responsible for
2468f9c9
PB		 13524 maintaining that condition). */
13525
13526static void
13527add_unwind_table_edit (arm_unwind_table_edit **head,
13528 arm_unwind_table_edit **tail,
13529 arm_unwind_edit_type type,
13530 asection *linked_section,
91d6fa6a 13531 unsigned int tindex)
2468f9c9 13532{
21d799b5
NC		 13533 arm_unwind_table_edit *new_edit = (arm_unwind_table_edit *)
13534 xmalloc (sizeof (arm_unwind_table_edit));
b38cadfb 13535
2468f9c9
PB		 13536 new_edit->type = type;
13537 new_edit->linked_section = linked_section;
91d6fa6a 13538 new_edit->index = tindex;
b38cadfb 13539
91d6fa6a 13540 if (tindex > 0)
2468f9c9
PB		 13541 {
13542 new_edit->next = NULL;
13543
13544 if (*tail)
13545 (*tail)->next = new_edit;
13546
13547 (*tail) = new_edit;
13548
13549 if (!*head)
13550 (*head) = new_edit;
13551 }
13552 else
13553 {
13554 new_edit->next = *head;
13555
13556 if (!*tail)
13557 *tail = new_edit;
13558
13559 *head = new_edit;
13560 }
13561}
13562
13563static _arm_elf_section_data *get_arm_elf_section_data (asection *);
13564
13565/* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
13566static void
13567adjust_exidx_size(asection *exidx_sec, int adjust)
13568{
13569 asection *out_sec;
13570
13571 if (!exidx_sec->rawsize)
13572 exidx_sec->rawsize = exidx_sec->size;
13573
fd361982 13574 bfd_set_section_size (exidx_sec, exidx_sec->size + adjust);
2468f9c9
PB		 13575 out_sec = exidx_sec->output_section;
13576 /* Adjust size of output section. */
fd361982 13577 bfd_set_section_size (out_sec, out_sec->size +adjust);
2468f9c9
PB		 13578}
13579
13580/* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
13581static void
13582insert_cantunwind_after(asection *text_sec, asection *exidx_sec)
13583{
13584 struct _arm_elf_section_data *exidx_arm_data;
13585
13586 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
13587 add_unwind_table_edit (
13588 &exidx_arm_data->u.exidx.unwind_edit_list,
13589 &exidx_arm_data->u.exidx.unwind_edit_tail,
13590 INSERT_EXIDX_CANTUNWIND_AT_END, text_sec, UINT_MAX);
13591
491d01d3
YU		 13592 exidx_arm_data->additional_reloc_count++;
13593
2468f9c9
PB		 13594 adjust_exidx_size(exidx_sec, 8);
13595}
13596
13597/* Scan .ARM.exidx tables, and create a list describing edits which should be
13598 made to those tables, such that:
b38cadfb 13599
2468f9c9
PB		 13600 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
13601 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
99059e56 13602 codes which have been inlined into the index).
2468f9c9 13603
85fdf906
AH		 13604 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
13605
2468f9c9 13606 The edits are applied when the tables are written
b38cadfb 13607 (in elf32_arm_write_section). */
2468f9c9
PB		 13608
13609bfd_boolean
13610elf32_arm_fix_exidx_coverage (asection **text_section_order,
13611 unsigned int num_text_sections,
85fdf906
AH		 13612 struct bfd_link_info *info,
13613 bfd_boolean merge_exidx_entries)
2468f9c9
PB		 13614{
13615 bfd *inp;
13616 unsigned int last_second_word = 0, i;
13617 asection *last_exidx_sec = NULL;
13618 asection *last_text_sec = NULL;
13619 int last_unwind_type = -1;
13620
13621 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
13622 text sections. */
c72f2fb2 13623 for (inp = info->input_bfds; inp != NULL; inp = inp->link.next)
2468f9c9
PB		 13624 {
13625 asection *sec;
b38cadfb 13626
2468f9c9 13627 for (sec = inp->sections; sec != NULL; sec = sec->next)
99059e56 13628 {
2468f9c9
PB		 13629 struct bfd_elf_section_data *elf_sec = elf_section_data (sec);
13630 Elf_Internal_Shdr *hdr = &elf_sec->this_hdr;
b38cadfb 13631
dec9d5df 13632 if (!hdr || hdr->sh_type != SHT_ARM_EXIDX)
2468f9c9 13633 continue;
b38cadfb 13634
2468f9c9
PB		 13635 if (elf_sec->linked_to)
13636 {
13637 Elf_Internal_Shdr *linked_hdr
99059e56 13638 = &elf_section_data (elf_sec->linked_to)->this_hdr;
2468f9c9 13639 struct _arm_elf_section_data *linked_sec_arm_data
99059e56 13640 = get_arm_elf_section_data (linked_hdr->bfd_section);
2468f9c9
PB		 13641
13642 if (linked_sec_arm_data == NULL)
99059e56 13643 continue;
2468f9c9
PB		 13644
13645 /* Link this .ARM.exidx section back from the text section it
99059e56 13646 describes. */
2468f9c9
PB		 13647 linked_sec_arm_data->u.text.arm_exidx_sec = sec;
13648 }
13649 }
13650 }
13651
13652 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
13653 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
91d6fa6a 13654 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
2468f9c9
PB		 13655
13656 for (i = 0; i < num_text_sections; i++)
13657 {
13658 asection *sec = text_section_order[i];
13659 asection *exidx_sec;
13660 struct _arm_elf_section_data *arm_data = get_arm_elf_section_data (sec);
13661 struct _arm_elf_section_data *exidx_arm_data;
13662 bfd_byte *contents = NULL;
13663 int deleted_exidx_bytes = 0;
13664 bfd_vma j;
13665 arm_unwind_table_edit *unwind_edit_head = NULL;
13666 arm_unwind_table_edit *unwind_edit_tail = NULL;
13667 Elf_Internal_Shdr *hdr;
13668 bfd *ibfd;
13669
13670 if (arm_data == NULL)
99059e56 13671 continue;
2468f9c9
PB		 13672
13673 exidx_sec = arm_data->u.text.arm_exidx_sec;
13674 if (exidx_sec == NULL)
13675 {
13676 /* Section has no unwind data. */
13677 if (last_unwind_type == 0 || !last_exidx_sec)
13678 continue;
13679
13680 /* Ignore zero sized sections. */
13681 if (sec->size == 0)
13682 continue;
13683
13684 insert_cantunwind_after(last_text_sec, last_exidx_sec);
13685 last_unwind_type = 0;
13686 continue;
13687 }
13688
22a8f80e
PB		 13689 /* Skip /DISCARD/ sections. */
13690 if (bfd_is_abs_section (exidx_sec->output_section))
13691 continue;
13692
2468f9c9
PB		 13693 hdr = &elf_section_data (exidx_sec)->this_hdr;
13694 if (hdr->sh_type != SHT_ARM_EXIDX)
99059e56 13695 continue;
b38cadfb 13696
2468f9c9
PB		 13697 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
13698 if (exidx_arm_data == NULL)
99059e56 13699 continue;
b38cadfb 13700
2468f9c9 13701 ibfd = exidx_sec->owner;
b38cadfb 13702
2468f9c9
PB		 13703 if (hdr->contents != NULL)
13704 contents = hdr->contents;
13705 else if (! bfd_malloc_and_get_section (ibfd, exidx_sec, &contents))
13706 /* An error? */
13707 continue;
13708
ac06903d
YU		 13709 if (last_unwind_type > 0)
13710 {
13711 unsigned int first_word = bfd_get_32 (ibfd, contents);
13712 /* Add cantunwind if first unwind item does not match section
13713 start. */
13714 if (first_word != sec->vma)
13715 {
13716 insert_cantunwind_after (last_text_sec, last_exidx_sec);
13717 last_unwind_type = 0;
13718 }
13719 }
13720
2468f9c9
PB		 13721 for (j = 0; j < hdr->sh_size; j += 8)
13722 {
13723 unsigned int second_word = bfd_get_32 (ibfd, contents + j + 4);
13724 int unwind_type;
13725 int elide = 0;
13726
13727 /* An EXIDX_CANTUNWIND entry. */
13728 if (second_word == 1)
13729 {
13730 if (last_unwind_type == 0)
13731 elide = 1;
13732 unwind_type = 0;
13733 }
13734 /* Inlined unwinding data. Merge if equal to previous. */
13735 else if ((second_word & 0x80000000) != 0)
13736 {
85fdf906
AH		 13737 if (merge_exidx_entries
13738 && last_second_word == second_word && last_unwind_type == 1)
2468f9c9
PB		 13739 elide = 1;
13740 unwind_type = 1;
13741 last_second_word = second_word;
13742 }
13743 /* Normal table entry. In theory we could merge these too,
13744 but duplicate entries are likely to be much less common. */
13745 else
13746 unwind_type = 2;
13747
491d01d3 13748 if (elide && !bfd_link_relocatable (info))
2468f9c9
PB		 13749 {
13750 add_unwind_table_edit (&unwind_edit_head, &unwind_edit_tail,
13751 DELETE_EXIDX_ENTRY, NULL, j / 8);
13752
13753 deleted_exidx_bytes += 8;
13754 }
13755
13756 last_unwind_type = unwind_type;
13757 }
13758
13759 /* Free contents if we allocated it ourselves. */
13760 if (contents != hdr->contents)
99059e56 13761 free (contents);
2468f9c9
PB		 13762
13763 /* Record edits to be applied later (in elf32_arm_write_section). */
13764 exidx_arm_data->u.exidx.unwind_edit_list = unwind_edit_head;
13765 exidx_arm_data->u.exidx.unwind_edit_tail = unwind_edit_tail;
b38cadfb 13766
2468f9c9
PB		 13767 if (deleted_exidx_bytes > 0)
13768 adjust_exidx_size(exidx_sec, -deleted_exidx_bytes);
13769
13770 last_exidx_sec = exidx_sec;
13771 last_text_sec = sec;
13772 }
13773
13774 /* Add terminating CANTUNWIND entry. */
491d01d3
YU		 13775 if (!bfd_link_relocatable (info) && last_exidx_sec
13776 && last_unwind_type != 0)
2468f9c9
PB		 13777 insert_cantunwind_after(last_text_sec, last_exidx_sec);
13778
13779 return TRUE;
13780}
13781
3e6b1042
DJ		 13782static bfd_boolean
13783elf32_arm_output_glue_section (struct bfd_link_info *info, bfd *obfd,
13784 bfd *ibfd, const char *name)
13785{
13786 asection *sec, *osec;
13787
3d4d4302 13788 sec = bfd_get_linker_section (ibfd, name);
3e6b1042
DJ		 13789 if (sec == NULL || (sec->flags & SEC_EXCLUDE) != 0)
13790 return TRUE;
13791
13792 osec = sec->output_section;
13793 if (elf32_arm_write_section (obfd, info, sec, sec->contents))
13794 return TRUE;
13795
13796 if (! bfd_set_section_contents (obfd, osec, sec->contents,
13797 sec->output_offset, sec->size))
13798 return FALSE;
13799
13800 return TRUE;
13801}
13802
13803static bfd_boolean
13804elf32_arm_final_link (bfd *abfd, struct bfd_link_info *info)
13805{
13806 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
fe33d2fa 13807 asection *sec, *osec;
3e6b1042 13808
4dfe6ac6
NC		 13809 if (globals == NULL)
13810 return FALSE;
13811
3e6b1042
DJ		 13812 /* Invoke the regular ELF backend linker to do all the work. */
13813 if (!bfd_elf_final_link (abfd, info))
13814 return FALSE;
13815
fe33d2fa
CL		 13816 /* Process stub sections (eg BE8 encoding, ...). */
13817 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
7292b3ac 13818 unsigned int i;
cdb21a0a
NS		 13819 for (i=0; i<htab->top_id; i++)
13820 {
13821 sec = htab->stub_group[i].stub_sec;
13822 /* Only process it once, in its link_sec slot. */
13823 if (sec && i == htab->stub_group[i].link_sec->id)
13824 {
13825 osec = sec->output_section;
13826 elf32_arm_write_section (abfd, info, sec, sec->contents);
13827 if (! bfd_set_section_contents (abfd, osec, sec->contents,
13828 sec->output_offset, sec->size))
13829 return FALSE;
13830 }
fe33d2fa 13831 }
fe33d2fa 13832
3e6b1042
DJ		 13833 /* Write out any glue sections now that we have created all the
13834 stubs. */
13835 if (globals->bfd_of_glue_owner != NULL)
13836 {
13837 if (! elf32_arm_output_glue_section (info, abfd,
13838 globals->bfd_of_glue_owner,
13839 ARM2THUMB_GLUE_SECTION_NAME))
13840 return FALSE;
13841
13842 if (! elf32_arm_output_glue_section (info, abfd,
13843 globals->bfd_of_glue_owner,
13844 THUMB2ARM_GLUE_SECTION_NAME))
13845 return FALSE;
13846
13847 if (! elf32_arm_output_glue_section (info, abfd,
13848 globals->bfd_of_glue_owner,
13849 VFP11_ERRATUM_VENEER_SECTION_NAME))
13850 return FALSE;
13851
a504d23a
LA		 13852 if (! elf32_arm_output_glue_section (info, abfd,
13853 globals->bfd_of_glue_owner,
13854 STM32L4XX_ERRATUM_VENEER_SECTION_NAME))
13855 return FALSE;
13856
3e6b1042
DJ		 13857 if (! elf32_arm_output_glue_section (info, abfd,
13858 globals->bfd_of_glue_owner,
13859 ARM_BX_GLUE_SECTION_NAME))
13860 return FALSE;
13861 }
13862
13863 return TRUE;
13864}
13865
5968a7b8
NC		 13866/* Return a best guess for the machine number based on the attributes. */
13867
13868static unsigned int
13869bfd_arm_get_mach_from_attributes (bfd * abfd)
13870{
13871 int arch = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_CPU_arch);
13872
13873 switch (arch)
13874 {
c0c468d5 13875 case TAG_CPU_ARCH_PRE_V4: return bfd_mach_arm_3M;
5968a7b8
NC		 13876 case TAG_CPU_ARCH_V4: return bfd_mach_arm_4;
13877 case TAG_CPU_ARCH_V4T: return bfd_mach_arm_4T;
13878 case TAG_CPU_ARCH_V5T: return bfd_mach_arm_5T;
13879
13880 case TAG_CPU_ARCH_V5TE:
13881 {
13882 char * name;
13883
13884 BFD_ASSERT (Tag_CPU_name < NUM_KNOWN_OBJ_ATTRIBUTES);
13885 name = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_CPU_name].s;
13886
13887 if (name)
13888 {
13889 if (strcmp (name, "IWMMXT2") == 0)
13890 return bfd_mach_arm_iWMMXt2;
13891
13892 if (strcmp (name, "IWMMXT") == 0)
6034aab8 13893 return bfd_mach_arm_iWMMXt;
088ca6c1
NC		 13894
13895 if (strcmp (name, "XSCALE") == 0)
13896 {
13897 int wmmx;
13898
13899 BFD_ASSERT (Tag_WMMX_arch < NUM_KNOWN_OBJ_ATTRIBUTES);
13900 wmmx = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_WMMX_arch].i;
13901 switch (wmmx)
13902 {
13903 case 1: return bfd_mach_arm_iWMMXt;
13904 case 2: return bfd_mach_arm_iWMMXt2;
13905 default: return bfd_mach_arm_XScale;
13906 }
13907 }
5968a7b8
NC		 13908 }
13909
13910 return bfd_mach_arm_5TE;
13911 }
13912
c0c468d5
TP		 13913 case TAG_CPU_ARCH_V5TEJ:
13914 return bfd_mach_arm_5TEJ;
13915 case TAG_CPU_ARCH_V6:
13916 return bfd_mach_arm_6;
13917 case TAG_CPU_ARCH_V6KZ:
13918 return bfd_mach_arm_6KZ;
13919 case TAG_CPU_ARCH_V6T2:
13920 return bfd_mach_arm_6T2;
13921 case TAG_CPU_ARCH_V6K:
13922 return bfd_mach_arm_6K;
13923 case TAG_CPU_ARCH_V7:
13924 return bfd_mach_arm_7;
13925 case TAG_CPU_ARCH_V6_M:
13926 return bfd_mach_arm_6M;
13927 case TAG_CPU_ARCH_V6S_M:
13928 return bfd_mach_arm_6SM;
13929 case TAG_CPU_ARCH_V7E_M:
13930 return bfd_mach_arm_7EM;
13931 case TAG_CPU_ARCH_V8:
13932 return bfd_mach_arm_8;
13933 case TAG_CPU_ARCH_V8R:
13934 return bfd_mach_arm_8R;
13935 case TAG_CPU_ARCH_V8M_BASE:
13936 return bfd_mach_arm_8M_BASE;
13937 case TAG_CPU_ARCH_V8M_MAIN:
13938 return bfd_mach_arm_8M_MAIN;
031254f2
AV		 13939 case TAG_CPU_ARCH_V8_1M_MAIN:
13940 return bfd_mach_arm_8_1M_MAIN;
c0c468d5 13941
5968a7b8 13942 default:
c0c468d5
TP		 13943 /* Force entry to be added for any new known Tag_CPU_arch value. */
13944 BFD_ASSERT (arch > MAX_TAG_CPU_ARCH);
13945
13946 /* Unknown Tag_CPU_arch value. */
5968a7b8
NC		 13947 return bfd_mach_arm_unknown;
13948 }
13949}
13950
c178919b
NC		 13951/* Set the right machine number. */
13952
13953static bfd_boolean
57e8b36a 13954elf32_arm_object_p (bfd *abfd)
c178919b 13955{
5a6c6817 13956 unsigned int mach;
57e8b36a 13957
5a6c6817 13958 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
c178919b 13959
5968a7b8
NC		 13960 if (mach == bfd_mach_arm_unknown)
13961 {
13962 if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
13963 mach = bfd_mach_arm_ep9312;
13964 else
13965 mach = bfd_arm_get_mach_from_attributes (abfd);
13966 }
c178919b 13967
5968a7b8 13968 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
c178919b
NC		 13969 return TRUE;
13970}
13971
fc830a83 13972/* Function to keep ARM specific flags in the ELF header. */
3c9458e9 13973
b34976b6 13974static bfd_boolean
57e8b36a 13975elf32_arm_set_private_flags (bfd *abfd, flagword flags)
252b5132
RH		 13976{
13977 if (elf_flags_init (abfd)
13978 && elf_elfheader (abfd)->e_flags != flags)
13979 {
fc830a83
NC		 13980 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
13981 {
fd2ec330 13982 if (flags & EF_ARM_INTERWORK)
4eca0228 13983 _bfd_error_handler
90b6238f 13984 (_("warning: not setting interworking flag of %pB since it has already been specified as non-interworking"),
d003868e 13985 abfd);
fc830a83 13986 else
d003868e 13987 _bfd_error_handler
90b6238f 13988 (_("warning: clearing the interworking flag of %pB due to outside request"),
d003868e 13989 abfd);
fc830a83 13990 }
252b5132
RH		 13991 }
13992 else
13993 {
13994 elf_elfheader (abfd)->e_flags = flags;
b34976b6 13995 elf_flags_init (abfd) = TRUE;
252b5132
RH		 13996 }
13997
b34976b6 13998 return TRUE;
252b5132
RH		 13999}
14000
fc830a83 14001/* Copy backend specific data from one object module to another. */
9b485d32 14002
b34976b6 14003static bfd_boolean
57e8b36a 14004elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
252b5132
RH		 14005{
14006 flagword in_flags;
14007 flagword out_flags;
14008
0ffa91dd 14009 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
b34976b6 14010 return TRUE;
252b5132 14011
fc830a83 14012 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH		 14013 out_flags = elf_elfheader (obfd)->e_flags;
14014
fc830a83
NC		 14015 if (elf_flags_init (obfd)
14016 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
14017 && in_flags != out_flags)
252b5132 14018 {
252b5132 14019 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 14020 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
b34976b6 14021 return FALSE;
252b5132
RH		 14022
14023 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 14024 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
b34976b6 14025 return FALSE;
252b5132
RH		 14026
14027 /* If the src and dest have different interworking flags
99059e56 14028 then turn off the interworking bit. */
fd2ec330 14029 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 14030 {
fd2ec330 14031 if (out_flags & EF_ARM_INTERWORK)
d003868e 14032 _bfd_error_handler
90b6238f 14033 (_("warning: clearing the interworking flag of %pB because non-interworking code in %pB has been linked with it"),
d003868e 14034 obfd, ibfd);
252b5132 14035
fd2ec330 14036 in_flags &= ~EF_ARM_INTERWORK;
252b5132 14037 }
1006ba19
PB		 14038
14039 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB		 14040 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
14041 in_flags &= ~EF_ARM_PIC;
252b5132
RH		 14042 }
14043
14044 elf_elfheader (obfd)->e_flags = in_flags;
b34976b6 14045 elf_flags_init (obfd) = TRUE;
252b5132 14046
e2349352 14047 return _bfd_elf_copy_private_bfd_data (ibfd, obfd);
ee065d83
PB		 14048}
14049
14050/* Values for Tag_ABI_PCS_R9_use. */
14051enum
14052{
14053 AEABI_R9_V6,
14054 AEABI_R9_SB,
14055 AEABI_R9_TLS,
14056 AEABI_R9_unused
14057};
14058
14059/* Values for Tag_ABI_PCS_RW_data. */
14060enum
14061{
14062 AEABI_PCS_RW_data_absolute,
14063 AEABI_PCS_RW_data_PCrel,
14064 AEABI_PCS_RW_data_SBrel,
14065 AEABI_PCS_RW_data_unused
14066};
14067
14068/* Values for Tag_ABI_enum_size. */
14069enum
14070{
14071 AEABI_enum_unused,
14072 AEABI_enum_short,
14073 AEABI_enum_wide,
14074 AEABI_enum_forced_wide
14075};
14076
104d59d1
JM		 14077/* Determine whether an object attribute tag takes an integer, a
14078 string or both. */
906e58ca 14079
104d59d1
JM		 14080static int
14081elf32_arm_obj_attrs_arg_type (int tag)
14082{
14083 if (tag == Tag_compatibility)
3483fe2e 14084 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
2d0bb761 14085 else if (tag == Tag_nodefaults)
3483fe2e
AS		 14086 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_NO_DEFAULT;
14087 else if (tag == Tag_CPU_raw_name || tag == Tag_CPU_name)
14088 return ATTR_TYPE_FLAG_STR_VAL;
104d59d1 14089 else if (tag < 32)
3483fe2e 14090 return ATTR_TYPE_FLAG_INT_VAL;
104d59d1 14091 else
3483fe2e 14092 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
104d59d1
JM		 14093}
14094
5aa6ff7c
AS		 14095/* The ABI defines that Tag_conformance should be emitted first, and that
14096 Tag_nodefaults should be second (if either is defined). This sets those
14097 two positions, and bumps up the position of all the remaining tags to
14098 compensate. */
14099static int
14100elf32_arm_obj_attrs_order (int num)
14101{
3de4a297 14102 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE)
5aa6ff7c 14103 return Tag_conformance;
3de4a297 14104 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE + 1)
5aa6ff7c
AS		 14105 return Tag_nodefaults;
14106 if ((num - 2) < Tag_nodefaults)
14107 return num - 2;
14108 if ((num - 1) < Tag_conformance)
14109 return num - 1;
14110 return num;
14111}
14112
e8b36cd1
JM		 14113/* Attribute numbers >=64 (mod 128) can be safely ignored. */
14114static bfd_boolean
14115elf32_arm_obj_attrs_handle_unknown (bfd *abfd, int tag)
14116{
14117 if ((tag & 127) < 64)
14118 {
14119 _bfd_error_handler
90b6238f 14120 (_("%pB: unknown mandatory EABI object attribute %d"),
e8b36cd1
JM		 14121 abfd, tag);
14122 bfd_set_error (bfd_error_bad_value);
14123 return FALSE;
14124 }
14125 else
14126 {
14127 _bfd_error_handler
90b6238f 14128 (_("warning: %pB: unknown EABI object attribute %d"),
e8b36cd1
JM		 14129 abfd, tag);
14130 return TRUE;
14131 }
14132}
14133
91e22acd
AS		 14134/* Read the architecture from the Tag_also_compatible_with attribute, if any.
14135 Returns -1 if no architecture could be read. */
14136
14137static int
14138get_secondary_compatible_arch (bfd *abfd)
14139{
14140 obj_attribute *attr =
14141 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
14142
14143 /* Note: the tag and its argument below are uleb128 values, though
14144 currently-defined values fit in one byte for each. */
14145 if (attr->s
14146 && attr->s[0] == Tag_CPU_arch
14147 && (attr->s[1] & 128) != 128
14148 && attr->s[2] == 0)
14149 return attr->s[1];
14150
14151 /* This tag is "safely ignorable", so don't complain if it looks funny. */
14152 return -1;
14153}
14154
14155/* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
14156 The tag is removed if ARCH is -1. */
14157
8e79c3df 14158static void
91e22acd 14159set_secondary_compatible_arch (bfd *abfd, int arch)
8e79c3df 14160{
91e22acd
AS		 14161 obj_attribute *attr =
14162 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
8e79c3df 14163
91e22acd
AS		 14164 if (arch == -1)
14165 {
14166 attr->s = NULL;
14167 return;
8e79c3df 14168 }
91e22acd
AS		 14169
14170 /* Note: the tag and its argument below are uleb128 values, though
14171 currently-defined values fit in one byte for each. */
14172 if (!attr->s)
21d799b5 14173 attr->s = (char *) bfd_alloc (abfd, 3);
91e22acd
AS		 14174 attr->s[0] = Tag_CPU_arch;
14175 attr->s[1] = arch;
14176 attr->s[2] = '\0';
8e79c3df
CM		 14177}
14178
91e22acd
AS		 14179/* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
14180 into account. */
14181
14182static int
14183tag_cpu_arch_combine (bfd *ibfd, int oldtag, int *secondary_compat_out,
14184 int newtag, int secondary_compat)
8e79c3df 14185{
91e22acd
AS		 14186#define T(X) TAG_CPU_ARCH_##X
14187 int tagl, tagh, result;
14188 const int v6t2[] =
14189 {
14190 T(V6T2), /* PRE_V4. */
14191 T(V6T2), /* V4. */
14192 T(V6T2), /* V4T. */
14193 T(V6T2), /* V5T. */
14194 T(V6T2), /* V5TE. */
14195 T(V6T2), /* V5TEJ. */
14196 T(V6T2), /* V6. */
14197 T(V7), /* V6KZ. */
14198 T(V6T2) /* V6T2. */
14199 };
14200 const int v6k[] =
14201 {
14202 T(V6K), /* PRE_V4. */
14203 T(V6K), /* V4. */
14204 T(V6K), /* V4T. */
14205 T(V6K), /* V5T. */
14206 T(V6K), /* V5TE. */
14207 T(V6K), /* V5TEJ. */
14208 T(V6K), /* V6. */
14209 T(V6KZ), /* V6KZ. */
14210 T(V7), /* V6T2. */
14211 T(V6K) /* V6K. */
14212 };
14213 const int v7[] =
14214 {
14215 T(V7), /* PRE_V4. */
14216 T(V7), /* V4. */
14217 T(V7), /* V4T. */
14218 T(V7), /* V5T. */
14219 T(V7), /* V5TE. */
14220 T(V7), /* V5TEJ. */
14221 T(V7), /* V6. */
14222 T(V7), /* V6KZ. */
14223 T(V7), /* V6T2. */
14224 T(V7), /* V6K. */
14225 T(V7) /* V7. */
14226 };
14227 const int v6_m[] =
14228 {
07d6d2b8
AM		 14229 -1, /* PRE_V4. */
14230 -1, /* V4. */
91e22acd
AS		 14231 T(V6K), /* V4T. */
14232 T(V6K), /* V5T. */
14233 T(V6K), /* V5TE. */
14234 T(V6K), /* V5TEJ. */
14235 T(V6K), /* V6. */
14236 T(V6KZ), /* V6KZ. */
14237 T(V7), /* V6T2. */
14238 T(V6K), /* V6K. */
14239 T(V7), /* V7. */
14240 T(V6_M) /* V6_M. */
14241 };
14242 const int v6s_m[] =
14243 {
07d6d2b8
AM		 14244 -1, /* PRE_V4. */
14245 -1, /* V4. */
91e22acd
AS		 14246 T(V6K), /* V4T. */
14247 T(V6K), /* V5T. */
14248 T(V6K), /* V5TE. */
14249 T(V6K), /* V5TEJ. */
14250 T(V6K), /* V6. */
14251 T(V6KZ), /* V6KZ. */
14252 T(V7), /* V6T2. */
14253 T(V6K), /* V6K. */
14254 T(V7), /* V7. */
14255 T(V6S_M), /* V6_M. */
14256 T(V6S_M) /* V6S_M. */
14257 };
9e3c6df6
PB		 14258 const int v7e_m[] =
14259 {
07d6d2b8
AM		 14260 -1, /* PRE_V4. */
14261 -1, /* V4. */
9e3c6df6
PB		 14262 T(V7E_M), /* V4T. */
14263 T(V7E_M), /* V5T. */
14264 T(V7E_M), /* V5TE. */
14265 T(V7E_M), /* V5TEJ. */
14266 T(V7E_M), /* V6. */
14267 T(V7E_M), /* V6KZ. */
14268 T(V7E_M), /* V6T2. */
14269 T(V7E_M), /* V6K. */
14270 T(V7E_M), /* V7. */
14271 T(V7E_M), /* V6_M. */
14272 T(V7E_M), /* V6S_M. */
14273 T(V7E_M) /* V7E_M. */
14274 };
bca38921
MGD		 14275 const int v8[] =
14276 {
14277 T(V8), /* PRE_V4. */
14278 T(V8), /* V4. */
14279 T(V8), /* V4T. */
14280 T(V8), /* V5T. */
14281 T(V8), /* V5TE. */
14282 T(V8), /* V5TEJ. */
14283 T(V8), /* V6. */
14284 T(V8), /* V6KZ. */
14285 T(V8), /* V6T2. */
14286 T(V8), /* V6K. */
14287 T(V8), /* V7. */
14288 T(V8), /* V6_M. */
14289 T(V8), /* V6S_M. */
14290 T(V8), /* V7E_M. */
14291 T(V8) /* V8. */
14292 };
bff0500d
TP		 14293 const int v8r[] =
14294 {
14295 T(V8R), /* PRE_V4. */
14296 T(V8R), /* V4. */
14297 T(V8R), /* V4T. */
14298 T(V8R), /* V5T. */
14299 T(V8R), /* V5TE. */
14300 T(V8R), /* V5TEJ. */
14301 T(V8R), /* V6. */
14302 T(V8R), /* V6KZ. */
14303 T(V8R), /* V6T2. */
14304 T(V8R), /* V6K. */
14305 T(V8R), /* V7. */
14306 T(V8R), /* V6_M. */
14307 T(V8R), /* V6S_M. */
14308 T(V8R), /* V7E_M. */
14309 T(V8), /* V8. */
14310 T(V8R), /* V8R. */
14311 };
2fd158eb
TP		 14312 const int v8m_baseline[] =
14313 {
14314 -1, /* PRE_V4. */
14315 -1, /* V4. */
14316 -1, /* V4T. */
14317 -1, /* V5T. */
14318 -1, /* V5TE. */
14319 -1, /* V5TEJ. */
14320 -1, /* V6. */
14321 -1, /* V6KZ. */
14322 -1, /* V6T2. */
14323 -1, /* V6K. */
14324 -1, /* V7. */
14325 T(V8M_BASE), /* V6_M. */
14326 T(V8M_BASE), /* V6S_M. */
14327 -1, /* V7E_M. */
14328 -1, /* V8. */
bff0500d 14329 -1, /* V8R. */
2fd158eb
TP		 14330 T(V8M_BASE) /* V8-M BASELINE. */
14331 };
14332 const int v8m_mainline[] =
14333 {
14334 -1, /* PRE_V4. */
14335 -1, /* V4. */
14336 -1, /* V4T. */
14337 -1, /* V5T. */
14338 -1, /* V5TE. */
14339 -1, /* V5TEJ. */
14340 -1, /* V6. */
14341 -1, /* V6KZ. */
14342 -1, /* V6T2. */
14343 -1, /* V6K. */
14344 T(V8M_MAIN), /* V7. */
14345 T(V8M_MAIN), /* V6_M. */
14346 T(V8M_MAIN), /* V6S_M. */
14347 T(V8M_MAIN), /* V7E_M. */
14348 -1, /* V8. */
bff0500d 14349 -1, /* V8R. */
2fd158eb
TP		 14350 T(V8M_MAIN), /* V8-M BASELINE. */
14351 T(V8M_MAIN) /* V8-M MAINLINE. */
14352 };
031254f2
AV		 14353 const int v8_1m_mainline[] =
14354 {
14355 -1, /* PRE_V4. */
14356 -1, /* V4. */
14357 -1, /* V4T. */
14358 -1, /* V5T. */
14359 -1, /* V5TE. */
14360 -1, /* V5TEJ. */
14361 -1, /* V6. */
14362 -1, /* V6KZ. */
14363 -1, /* V6T2. */
14364 -1, /* V6K. */
14365 T(V8_1M_MAIN), /* V7. */
14366 T(V8_1M_MAIN), /* V6_M. */
14367 T(V8_1M_MAIN), /* V6S_M. */
14368 T(V8_1M_MAIN), /* V7E_M. */
14369 -1, /* V8. */
14370 -1, /* V8R. */
14371 T(V8_1M_MAIN), /* V8-M BASELINE. */
14372 T(V8_1M_MAIN), /* V8-M MAINLINE. */
14373 -1, /* Unused (18). */
14374 -1, /* Unused (19). */
14375 -1, /* Unused (20). */
14376 T(V8_1M_MAIN) /* V8.1-M MAINLINE. */
14377 };
91e22acd
AS		 14378 const int v4t_plus_v6_m[] =
14379 {
14380 -1, /* PRE_V4. */
14381 -1, /* V4. */
14382 T(V4T), /* V4T. */
14383 T(V5T), /* V5T. */
14384 T(V5TE), /* V5TE. */
14385 T(V5TEJ), /* V5TEJ. */
14386 T(V6), /* V6. */
14387 T(V6KZ), /* V6KZ. */
14388 T(V6T2), /* V6T2. */
14389 T(V6K), /* V6K. */
14390 T(V7), /* V7. */
14391 T(V6_M), /* V6_M. */
14392 T(V6S_M), /* V6S_M. */
9e3c6df6 14393 T(V7E_M), /* V7E_M. */
bca38921 14394 T(V8), /* V8. */
bff0500d 14395 -1, /* V8R. */
2fd158eb
TP		 14396 T(V8M_BASE), /* V8-M BASELINE. */
14397 T(V8M_MAIN), /* V8-M MAINLINE. */
031254f2
AV		 14398 -1, /* Unused (18). */
14399 -1, /* Unused (19). */
14400 -1, /* Unused (20). */
14401 T(V8_1M_MAIN), /* V8.1-M MAINLINE. */
91e22acd
AS		 14402 T(V4T_PLUS_V6_M) /* V4T plus V6_M. */
14403 };
14404 const int *comb[] =
14405 {
14406 v6t2,
14407 v6k,
14408 v7,
14409 v6_m,
14410 v6s_m,
9e3c6df6 14411 v7e_m,
bca38921 14412 v8,
bff0500d 14413 v8r,
2fd158eb
TP		 14414 v8m_baseline,
14415 v8m_mainline,
031254f2
AV		 14416 NULL,
14417 NULL,
14418 NULL,
14419 v8_1m_mainline,
91e22acd
AS		 14420 /* Pseudo-architecture. */
14421 v4t_plus_v6_m
14422 };
14423
14424 /* Check we've not got a higher architecture than we know about. */
14425
9e3c6df6 14426 if (oldtag > MAX_TAG_CPU_ARCH || newtag > MAX_TAG_CPU_ARCH)
91e22acd 14427 {
90b6238f 14428 _bfd_error_handler (_("error: %pB: unknown CPU architecture"), ibfd);
91e22acd
AS		 14429 return -1;
14430 }
14431
14432 /* Override old tag if we have a Tag_also_compatible_with on the output. */
14433
14434 if ((oldtag == T(V6_M) && *secondary_compat_out == T(V4T))
14435 || (oldtag == T(V4T) && *secondary_compat_out == T(V6_M)))
14436 oldtag = T(V4T_PLUS_V6_M);
14437
14438 /* And override the new tag if we have a Tag_also_compatible_with on the
14439 input. */
14440
14441 if ((newtag == T(V6_M) && secondary_compat == T(V4T))
14442 || (newtag == T(V4T) && secondary_compat == T(V6_M)))
14443 newtag = T(V4T_PLUS_V6_M);
14444
14445 tagl = (oldtag < newtag) ? oldtag : newtag;
14446 result = tagh = (oldtag > newtag) ? oldtag : newtag;
14447
14448 /* Architectures before V6KZ add features monotonically. */
14449 if (tagh <= TAG_CPU_ARCH_V6KZ)
14450 return result;
14451
4ed7ed8d 14452 result = comb[tagh - T(V6T2)] ? comb[tagh - T(V6T2)][tagl] : -1;
91e22acd
AS		 14453
14454 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
14455 as the canonical version. */
14456 if (result == T(V4T_PLUS_V6_M))
14457 {
14458 result = T(V4T);
14459 *secondary_compat_out = T(V6_M);
14460 }
14461 else
14462 *secondary_compat_out = -1;
14463
14464 if (result == -1)
14465 {
90b6238f 14466 _bfd_error_handler (_("error: %pB: conflicting CPU architectures %d/%d"),
91e22acd
AS		 14467 ibfd, oldtag, newtag);
14468 return -1;
14469 }
14470
14471 return result;
14472#undef T
8e79c3df
CM		 14473}
14474
ac56ee8f
MGD		 14475/* Query attributes object to see if integer divide instructions may be
14476 present in an object. */
14477static bfd_boolean
14478elf32_arm_attributes_accept_div (const obj_attribute *attr)
14479{
14480 int arch = attr[Tag_CPU_arch].i;
14481 int profile = attr[Tag_CPU_arch_profile].i;
14482
14483 switch (attr[Tag_DIV_use].i)
14484 {
14485 case 0:
14486 /* Integer divide allowed if instruction contained in archetecture. */
14487 if (arch == TAG_CPU_ARCH_V7 && (profile == 'R' || profile == 'M'))
14488 return TRUE;
14489 else if (arch >= TAG_CPU_ARCH_V7E_M)
14490 return TRUE;
14491 else
14492 return FALSE;
14493
14494 case 1:
14495 /* Integer divide explicitly prohibited. */
14496 return FALSE;
14497
14498 default:
14499 /* Unrecognised case - treat as allowing divide everywhere. */
14500 case 2:
14501 /* Integer divide allowed in ARM state. */
14502 return TRUE;
14503 }
14504}
14505
14506/* Query attributes object to see if integer divide instructions are
14507 forbidden to be in the object. This is not the inverse of
14508 elf32_arm_attributes_accept_div. */
14509static bfd_boolean
14510elf32_arm_attributes_forbid_div (const obj_attribute *attr)
14511{
14512 return attr[Tag_DIV_use].i == 1;
14513}
14514
ee065d83
PB		 14515/* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
14516 are conflicting attributes. */
906e58ca 14517
ee065d83 14518static bfd_boolean
50e03d47 14519elf32_arm_merge_eabi_attributes (bfd *ibfd, struct bfd_link_info *info)
ee065d83 14520{
50e03d47 14521 bfd *obfd = info->output_bfd;
104d59d1
JM		 14522 obj_attribute *in_attr;
14523 obj_attribute *out_attr;
ee065d83
PB		 14524 /* Some tags have 0 = don't care, 1 = strong requirement,
14525 2 = weak requirement. */
91e22acd 14526 static const int order_021[3] = {0, 2, 1};
ee065d83 14527 int i;
91e22acd 14528 bfd_boolean result = TRUE;
9274e9de 14529 const char *sec_name = get_elf_backend_data (ibfd)->obj_attrs_section;
ee065d83 14530
3e6b1042
DJ		 14531 /* Skip the linker stubs file. This preserves previous behavior
14532 of accepting unknown attributes in the first input file - but
14533 is that a bug? */
14534 if (ibfd->flags & BFD_LINKER_CREATED)
14535 return TRUE;
14536
9274e9de
TG		 14537 /* Skip any input that hasn't attribute section.
14538 This enables to link object files without attribute section with
14539 any others. */
14540 if (bfd_get_section_by_name (ibfd, sec_name) == NULL)
14541 return TRUE;
14542
104d59d1 14543 if (!elf_known_obj_attributes_proc (obfd)[0].i)
ee065d83
PB		 14544 {
14545 /* This is the first object. Copy the attributes. */
104d59d1 14546 _bfd_elf_copy_obj_attributes (ibfd, obfd);
004ae526 14547
cd21e546
MGD		 14548 out_attr = elf_known_obj_attributes_proc (obfd);
14549
004ae526
PB		 14550 /* Use the Tag_null value to indicate the attributes have been
14551 initialized. */
cd21e546 14552 out_attr[0].i = 1;
004ae526 14553
cd21e546
MGD		 14554 /* We do not output objects with Tag_MPextension_use_legacy - we move
14555 the attribute's value to Tag_MPextension_use. */
14556 if (out_attr[Tag_MPextension_use_legacy].i != 0)
14557 {
14558 if (out_attr[Tag_MPextension_use].i != 0
14559 && out_attr[Tag_MPextension_use_legacy].i
99059e56 14560 != out_attr[Tag_MPextension_use].i)
cd21e546
MGD		 14561 {
14562 _bfd_error_handler
871b3ab2 14563 (_("Error: %pB has both the current and legacy "
cd21e546
MGD		 14564 "Tag_MPextension_use attributes"), ibfd);
14565 result = FALSE;
14566 }
14567
14568 out_attr[Tag_MPextension_use] =
14569 out_attr[Tag_MPextension_use_legacy];
14570 out_attr[Tag_MPextension_use_legacy].type = 0;
14571 out_attr[Tag_MPextension_use_legacy].i = 0;
14572 }
14573
14574 return result;
ee065d83
PB		 14575 }
14576
104d59d1
JM		 14577 in_attr = elf_known_obj_attributes_proc (ibfd);
14578 out_attr = elf_known_obj_attributes_proc (obfd);
ee065d83
PB		 14579 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
14580 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
14581 {
5c294fee
TG		 14582 /* Ignore mismatches if the object doesn't use floating point or is
14583 floating point ABI independent. */
14584 if (out_attr[Tag_ABI_FP_number_model].i == AEABI_FP_number_model_none
14585 || (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
14586 && out_attr[Tag_ABI_VFP_args].i == AEABI_VFP_args_compatible))
ee065d83 14587 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
5c294fee
TG		 14588 else if (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
14589 && in_attr[Tag_ABI_VFP_args].i != AEABI_VFP_args_compatible)
ee065d83
PB		 14590 {
14591 _bfd_error_handler
871b3ab2 14592 (_("error: %pB uses VFP register arguments, %pB does not"),
deddc40b
NS		 14593 in_attr[Tag_ABI_VFP_args].i ? ibfd : obfd,
14594 in_attr[Tag_ABI_VFP_args].i ? obfd : ibfd);
91e22acd 14595 result = FALSE;
ee065d83
PB		 14596 }
14597 }
14598
3de4a297 14599 for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
ee065d83
PB		 14600 {
14601 /* Merge this attribute with existing attributes. */
14602 switch (i)
14603 {
14604 case Tag_CPU_raw_name:
14605 case Tag_CPU_name:
6a631e86 14606 /* These are merged after Tag_CPU_arch. */
ee065d83
PB		 14607 break;
14608
14609 case Tag_ABI_optimization_goals:
14610 case Tag_ABI_FP_optimization_goals:
14611 /* Use the first value seen. */
14612 break;
14613
14614 case Tag_CPU_arch:
91e22acd
AS		 14615 {
14616 int secondary_compat = -1, secondary_compat_out = -1;
14617 unsigned int saved_out_attr = out_attr[i].i;
70e99720
TG		 14618 int arch_attr;
14619 static const char *name_table[] =
14620 {
91e22acd
AS		 14621 /* These aren't real CPU names, but we can't guess
14622 that from the architecture version alone. */
14623 "Pre v4",
14624 "ARM v4",
14625 "ARM v4T",
14626 "ARM v5T",
14627 "ARM v5TE",
14628 "ARM v5TEJ",
14629 "ARM v6",
14630 "ARM v6KZ",
14631 "ARM v6T2",
14632 "ARM v6K",
14633 "ARM v7",
14634 "ARM v6-M",
bca38921 14635 "ARM v6S-M",
2fd158eb
TP		 14636 "ARM v8",
14637 "",
14638 "ARM v8-M.baseline",
14639 "ARM v8-M.mainline",
91e22acd
AS		 14640 };
14641
14642 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
14643 secondary_compat = get_secondary_compatible_arch (ibfd);
14644 secondary_compat_out = get_secondary_compatible_arch (obfd);
70e99720
TG		 14645 arch_attr = tag_cpu_arch_combine (ibfd, out_attr[i].i,
14646 &secondary_compat_out,
14647 in_attr[i].i,
14648 secondary_compat);
14649
14650 /* Return with error if failed to merge. */
14651 if (arch_attr == -1)
14652 return FALSE;
14653
14654 out_attr[i].i = arch_attr;
14655
91e22acd
AS		 14656 set_secondary_compatible_arch (obfd, secondary_compat_out);
14657
14658 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
14659 if (out_attr[i].i == saved_out_attr)
14660 ; /* Leave the names alone. */
14661 else if (out_attr[i].i == in_attr[i].i)
14662 {
14663 /* The output architecture has been changed to match the
14664 input architecture. Use the input names. */
14665 out_attr[Tag_CPU_name].s = in_attr[Tag_CPU_name].s
14666 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_name].s)
14667 : NULL;
14668 out_attr[Tag_CPU_raw_name].s = in_attr[Tag_CPU_raw_name].s
14669 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_raw_name].s)
14670 : NULL;
14671 }
14672 else
14673 {
14674 out_attr[Tag_CPU_name].s = NULL;
14675 out_attr[Tag_CPU_raw_name].s = NULL;
14676 }
14677
14678 /* If we still don't have a value for Tag_CPU_name,
14679 make one up now. Tag_CPU_raw_name remains blank. */
14680 if (out_attr[Tag_CPU_name].s == NULL
14681 && out_attr[i].i < ARRAY_SIZE (name_table))
14682 out_attr[Tag_CPU_name].s =
14683 _bfd_elf_attr_strdup (obfd, name_table[out_attr[i].i]);
14684 }
14685 break;
14686
ee065d83
PB		 14687 case Tag_ARM_ISA_use:
14688 case Tag_THUMB_ISA_use:
ee065d83 14689 case Tag_WMMX_arch:
91e22acd
AS		 14690 case Tag_Advanced_SIMD_arch:
14691 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
ee065d83 14692 case Tag_ABI_FP_rounding:
ee065d83
PB		 14693 case Tag_ABI_FP_exceptions:
14694 case Tag_ABI_FP_user_exceptions:
14695 case Tag_ABI_FP_number_model:
75375b3e 14696 case Tag_FP_HP_extension:
91e22acd
AS		 14697 case Tag_CPU_unaligned_access:
14698 case Tag_T2EE_use:
91e22acd 14699 case Tag_MPextension_use:
a7ad558c 14700 case Tag_MVE_arch:
ee065d83
PB		 14701 /* Use the largest value specified. */
14702 if (in_attr[i].i > out_attr[i].i)
14703 out_attr[i].i = in_attr[i].i;
14704 break;
14705
75375b3e 14706 case Tag_ABI_align_preserved:
91e22acd
AS		 14707 case Tag_ABI_PCS_RO_data:
14708 /* Use the smallest value specified. */
14709 if (in_attr[i].i < out_attr[i].i)
14710 out_attr[i].i = in_attr[i].i;
14711 break;
14712
75375b3e 14713 case Tag_ABI_align_needed:
91e22acd 14714 if ((in_attr[i].i > 0 || out_attr[i].i > 0)
75375b3e
MGD		 14715 && (in_attr[Tag_ABI_align_preserved].i == 0
14716 || out_attr[Tag_ABI_align_preserved].i == 0))
ee065d83 14717 {
91e22acd
AS		 14718 /* This error message should be enabled once all non-conformant
14719 binaries in the toolchain have had the attributes set
14720 properly.
ee065d83 14721 _bfd_error_handler
871b3ab2 14722 (_("error: %pB: 8-byte data alignment conflicts with %pB"),
91e22acd
AS		 14723 obfd, ibfd);
14724 result = FALSE; */
ee065d83 14725 }
91e22acd
AS		 14726 /* Fall through. */
14727 case Tag_ABI_FP_denormal:
14728 case Tag_ABI_PCS_GOT_use:
14729 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
14730 value if greater than 2 (for future-proofing). */
14731 if ((in_attr[i].i > 2 && in_attr[i].i > out_attr[i].i)
14732 || (in_attr[i].i <= 2 && out_attr[i].i <= 2
14733 && order_021[in_attr[i].i] > order_021[out_attr[i].i]))
ee065d83
PB		 14734 out_attr[i].i = in_attr[i].i;
14735 break;
91e22acd 14736
75375b3e
MGD		 14737 case Tag_Virtualization_use:
14738 /* The virtualization tag effectively stores two bits of
14739 information: the intended use of TrustZone (in bit 0), and the
14740 intended use of Virtualization (in bit 1). */
14741 if (out_attr[i].i == 0)
14742 out_attr[i].i = in_attr[i].i;
14743 else if (in_attr[i].i != 0
14744 && in_attr[i].i != out_attr[i].i)
14745 {
14746 if (in_attr[i].i <= 3 && out_attr[i].i <= 3)
14747 out_attr[i].i = 3;
14748 else
14749 {
14750 _bfd_error_handler
871b3ab2
AM		 14751 (_("error: %pB: unable to merge virtualization attributes "
14752 "with %pB"),
75375b3e
MGD		 14753 obfd, ibfd);
14754 result = FALSE;
14755 }
14756 }
14757 break;
91e22acd
AS		 14758
14759 case Tag_CPU_arch_profile:
14760 if (out_attr[i].i != in_attr[i].i)
14761 {
14762 /* 0 will merge with anything.
14763 'A' and 'S' merge to 'A'.
14764 'R' and 'S' merge to 'R'.
99059e56 14765 'M' and 'A|R|S' is an error. */
91e22acd
AS		 14766 if (out_attr[i].i == 0
14767 || (out_attr[i].i == 'S'
14768 && (in_attr[i].i == 'A' || in_attr[i].i == 'R')))
14769 out_attr[i].i = in_attr[i].i;
14770 else if (in_attr[i].i == 0
14771 || (in_attr[i].i == 'S'
14772 && (out_attr[i].i == 'A' || out_attr[i].i == 'R')))
6a631e86 14773 ; /* Do nothing. */
91e22acd
AS		 14774 else
14775 {
14776 _bfd_error_handler
90b6238f 14777 (_("error: %pB: conflicting architecture profiles %c/%c"),
91e22acd
AS		 14778 ibfd,
14779 in_attr[i].i ? in_attr[i].i : '0',
14780 out_attr[i].i ? out_attr[i].i : '0');
14781 result = FALSE;
14782 }
14783 }
14784 break;
15afaa63
TP		 14785
14786 case Tag_DSP_extension:
14787 /* No need to change output value if any of:
14788 - pre (<=) ARMv5T input architecture (do not have DSP)
14789 - M input profile not ARMv7E-M and do not have DSP. */
14790 if (in_attr[Tag_CPU_arch].i <= 3
14791 || (in_attr[Tag_CPU_arch_profile].i == 'M'
14792 && in_attr[Tag_CPU_arch].i != 13
14793 && in_attr[i].i == 0))
14794 ; /* Do nothing. */
14795 /* Output value should be 0 if DSP part of architecture, ie.
14796 - post (>=) ARMv5te architecture output
14797 - A, R or S profile output or ARMv7E-M output architecture. */
14798 else if (out_attr[Tag_CPU_arch].i >= 4
14799 && (out_attr[Tag_CPU_arch_profile].i == 'A'
14800 || out_attr[Tag_CPU_arch_profile].i == 'R'
14801 || out_attr[Tag_CPU_arch_profile].i == 'S'
14802 || out_attr[Tag_CPU_arch].i == 13))
14803 out_attr[i].i = 0;
14804 /* Otherwise, DSP instructions are added and not part of output
14805 architecture. */
14806 else
14807 out_attr[i].i = 1;
14808 break;
14809
75375b3e 14810 case Tag_FP_arch:
62f3b8c8 14811 {
4547cb56
NC		 14812 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
14813 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
14814 when it's 0. It might mean absence of FP hardware if
99654aaf 14815 Tag_FP_arch is zero. */
4547cb56 14816
a715796b 14817#define VFP_VERSION_COUNT 9
62f3b8c8
PB		 14818 static const struct
14819 {
14820 int ver;
14821 int regs;
bca38921 14822 } vfp_versions[VFP_VERSION_COUNT] =
62f3b8c8
PB		 14823 {
14824 {0, 0},
14825 {1, 16},
14826 {2, 16},
14827 {3, 32},
14828 {3, 16},
14829 {4, 32},
bca38921 14830 {4, 16},
a715796b
TG		 14831 {8, 32},
14832 {8, 16}
62f3b8c8
PB		 14833 };
14834 int ver;
14835 int regs;
14836 int newval;
14837
4547cb56
NC		 14838 /* If the output has no requirement about FP hardware,
14839 follow the requirement of the input. */
14840 if (out_attr[i].i == 0)
14841 {
4ec192e6
RE		 14842 /* This assert is still reasonable, we shouldn't
14843 produce the suspicious build attribute
14844 combination (See below for in_attr). */
4547cb56
NC		 14845 BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0);
14846 out_attr[i].i = in_attr[i].i;
14847 out_attr[Tag_ABI_HardFP_use].i
14848 = in_attr[Tag_ABI_HardFP_use].i;
14849 break;
14850 }
14851 /* If the input has no requirement about FP hardware, do
14852 nothing. */
14853 else if (in_attr[i].i == 0)
14854 {
4ec192e6
RE		 14855 /* We used to assert that Tag_ABI_HardFP_use was
14856 zero here, but we should never assert when
14857 consuming an object file that has suspicious
14858 build attributes. The single precision variant
14859 of 'no FP architecture' is still 'no FP
14860 architecture', so we just ignore the tag in this
14861 case. */
4547cb56
NC		 14862 break;
14863 }
14864
14865 /* Both the input and the output have nonzero Tag_FP_arch.
99654aaf 14866 So Tag_ABI_HardFP_use is implied by Tag_FP_arch when it's zero. */
4547cb56
NC		 14867
14868 /* If both the input and the output have zero Tag_ABI_HardFP_use,
14869 do nothing. */
14870 if (in_attr[Tag_ABI_HardFP_use].i == 0
14871 && out_attr[Tag_ABI_HardFP_use].i == 0)
14872 ;
14873 /* If the input and the output have different Tag_ABI_HardFP_use,
99654aaf 14874 the combination of them is 0 (implied by Tag_FP_arch). */
4547cb56
NC		 14875 else if (in_attr[Tag_ABI_HardFP_use].i
14876 != out_attr[Tag_ABI_HardFP_use].i)
99654aaf 14877 out_attr[Tag_ABI_HardFP_use].i = 0;
4547cb56
NC		 14878
14879 /* Now we can handle Tag_FP_arch. */
14880
bca38921
MGD		 14881 /* Values of VFP_VERSION_COUNT or more aren't defined, so just
14882 pick the biggest. */
14883 if (in_attr[i].i >= VFP_VERSION_COUNT
14884 && in_attr[i].i > out_attr[i].i)
62f3b8c8
PB		 14885 {
14886 out_attr[i] = in_attr[i];
14887 break;
14888 }
14889 /* The output uses the superset of input features
14890 (ISA version) and registers. */
14891 ver = vfp_versions[in_attr[i].i].ver;
14892 if (ver < vfp_versions[out_attr[i].i].ver)
14893 ver = vfp_versions[out_attr[i].i].ver;
14894 regs = vfp_versions[in_attr[i].i].regs;
14895 if (regs < vfp_versions[out_attr[i].i].regs)
14896 regs = vfp_versions[out_attr[i].i].regs;
14897 /* This assumes all possible supersets are also a valid
99059e56 14898 options. */
bca38921 14899 for (newval = VFP_VERSION_COUNT - 1; newval > 0; newval--)
62f3b8c8
PB		 14900 {
14901 if (regs == vfp_versions[newval].regs
14902 && ver == vfp_versions[newval].ver)
14903 break;
14904 }
14905 out_attr[i].i = newval;
14906 }
b1cc4aeb 14907 break;
ee065d83
PB		 14908 case Tag_PCS_config:
14909 if (out_attr[i].i == 0)
14910 out_attr[i].i = in_attr[i].i;
b6009aca 14911 else if (in_attr[i].i != 0 && out_attr[i].i != in_attr[i].i)
ee065d83
PB		 14912 {
14913 /* It's sometimes ok to mix different configs, so this is only
99059e56 14914 a warning. */
ee065d83 14915 _bfd_error_handler
90b6238f 14916 (_("warning: %pB: conflicting platform configuration"), ibfd);
ee065d83
PB		 14917 }
14918 break;
14919 case Tag_ABI_PCS_R9_use:
004ae526
PB		 14920 if (in_attr[i].i != out_attr[i].i
14921 && out_attr[i].i != AEABI_R9_unused
ee065d83
PB		 14922 && in_attr[i].i != AEABI_R9_unused)
14923 {
14924 _bfd_error_handler
90b6238f 14925 (_("error: %pB: conflicting use of R9"), ibfd);
91e22acd 14926 result = FALSE;
ee065d83
PB		 14927 }
14928 if (out_attr[i].i == AEABI_R9_unused)
14929 out_attr[i].i = in_attr[i].i;
14930 break;
14931 case Tag_ABI_PCS_RW_data:
14932 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
14933 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
14934 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
14935 {
14936 _bfd_error_handler
871b3ab2 14937 (_("error: %pB: SB relative addressing conflicts with use of R9"),
ee065d83 14938 ibfd);
91e22acd 14939 result = FALSE;
ee065d83
PB		 14940 }
14941 /* Use the smallest value specified. */
14942 if (in_attr[i].i < out_attr[i].i)
14943 out_attr[i].i = in_attr[i].i;
14944 break;
ee065d83 14945 case Tag_ABI_PCS_wchar_t:
a9dc9481
JM		 14946 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
14947 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
ee065d83
PB		 14948 {
14949 _bfd_error_handler
871b3ab2 14950 (_("warning: %pB uses %u-byte wchar_t yet the output is to use %u-byte wchar_t; use of wchar_t values across objects may fail"),
a9dc9481 14951 ibfd, in_attr[i].i, out_attr[i].i);
ee065d83 14952 }
a9dc9481 14953 else if (in_attr[i].i && !out_attr[i].i)
ee065d83
PB		 14954 out_attr[i].i = in_attr[i].i;
14955 break;
ee065d83
PB		 14956 case Tag_ABI_enum_size:
14957 if (in_attr[i].i != AEABI_enum_unused)
14958 {
14959 if (out_attr[i].i == AEABI_enum_unused
14960 || out_attr[i].i == AEABI_enum_forced_wide)
14961 {
14962 /* The existing object is compatible with anything.
14963 Use whatever requirements the new object has. */
14964 out_attr[i].i = in_attr[i].i;
14965 }
14966 else if (in_attr[i].i != AEABI_enum_forced_wide
bf21ed78 14967 && out_attr[i].i != in_attr[i].i
0ffa91dd 14968 && !elf_arm_tdata (obfd)->no_enum_size_warning)
ee065d83 14969 {
91e22acd 14970 static const char *aeabi_enum_names[] =
bf21ed78 14971 { "", "variable-size", "32-bit", "" };
91e22acd
AS		 14972 const char *in_name =
14973 in_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
14974 ? aeabi_enum_names[in_attr[i].i]
14975 : "<unknown>";
14976 const char *out_name =
14977 out_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
14978 ? aeabi_enum_names[out_attr[i].i]
14979 : "<unknown>";
ee065d83 14980 _bfd_error_handler
871b3ab2 14981 (_("warning: %pB uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
91e22acd 14982 ibfd, in_name, out_name);
ee065d83
PB		 14983 }
14984 }
14985 break;
14986 case Tag_ABI_VFP_args:
14987 /* Aready done. */
14988 break;
14989 case Tag_ABI_WMMX_args:
14990 if (in_attr[i].i != out_attr[i].i)
14991 {
14992 _bfd_error_handler
871b3ab2 14993 (_("error: %pB uses iWMMXt register arguments, %pB does not"),
ee065d83 14994 ibfd, obfd);
91e22acd 14995 result = FALSE;
ee065d83
PB		 14996 }
14997 break;
7b86a9fa
AS		 14998 case Tag_compatibility:
14999 /* Merged in target-independent code. */
15000 break;
91e22acd 15001 case Tag_ABI_HardFP_use:
4547cb56 15002 /* This is handled along with Tag_FP_arch. */
91e22acd
AS		 15003 break;
15004 case Tag_ABI_FP_16bit_format:
15005 if (in_attr[i].i != 0 && out_attr[i].i != 0)
15006 {
15007 if (in_attr[i].i != out_attr[i].i)
15008 {
15009 _bfd_error_handler
871b3ab2 15010 (_("error: fp16 format mismatch between %pB and %pB"),
91e22acd
AS		 15011 ibfd, obfd);
15012 result = FALSE;
15013 }
15014 }
15015 if (in_attr[i].i != 0)
15016 out_attr[i].i = in_attr[i].i;
15017 break;
7b86a9fa 15018
cd21e546 15019 case Tag_DIV_use:
ac56ee8f
MGD		 15020 /* A value of zero on input means that the divide instruction may
15021 be used if available in the base architecture as specified via
15022 Tag_CPU_arch and Tag_CPU_arch_profile. A value of 1 means that
15023 the user did not want divide instructions. A value of 2
15024 explicitly means that divide instructions were allowed in ARM
15025 and Thumb state. */
15026 if (in_attr[i].i == out_attr[i].i)
15027 /* Do nothing. */ ;
15028 else if (elf32_arm_attributes_forbid_div (in_attr)
15029 && !elf32_arm_attributes_accept_div (out_attr))
15030 out_attr[i].i = 1;
15031 else if (elf32_arm_attributes_forbid_div (out_attr)
15032 && elf32_arm_attributes_accept_div (in_attr))
15033 out_attr[i].i = in_attr[i].i;
15034 else if (in_attr[i].i == 2)
15035 out_attr[i].i = in_attr[i].i;
cd21e546
MGD		 15036 break;
15037
15038 case Tag_MPextension_use_legacy:
15039 /* We don't output objects with Tag_MPextension_use_legacy - we
15040 move the value to Tag_MPextension_use. */
15041 if (in_attr[i].i != 0 && in_attr[Tag_MPextension_use].i != 0)
15042 {
15043 if (in_attr[Tag_MPextension_use].i != in_attr[i].i)
15044 {
15045 _bfd_error_handler
871b3ab2 15046 (_("%pB has both the current and legacy "
b38cadfb 15047 "Tag_MPextension_use attributes"),
cd21e546
MGD		 15048 ibfd);
15049 result = FALSE;
15050 }
15051 }
15052
15053 if (in_attr[i].i > out_attr[Tag_MPextension_use].i)
15054 out_attr[Tag_MPextension_use] = in_attr[i];
15055
15056 break;
15057
91e22acd 15058 case Tag_nodefaults:
2d0bb761
AS		 15059 /* This tag is set if it exists, but the value is unused (and is
15060 typically zero). We don't actually need to do anything here -
15061 the merge happens automatically when the type flags are merged
15062 below. */
91e22acd
AS		 15063 break;
15064 case Tag_also_compatible_with:
15065 /* Already done in Tag_CPU_arch. */
15066 break;
15067 case Tag_conformance:
15068 /* Keep the attribute if it matches. Throw it away otherwise.
15069 No attribute means no claim to conform. */
15070 if (!in_attr[i].s || !out_attr[i].s
15071 || strcmp (in_attr[i].s, out_attr[i].s) != 0)
15072 out_attr[i].s = NULL;
15073 break;
3cfad14c 15074
91e22acd 15075 default:
e8b36cd1
JM		 15076 result
15077 = result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i);
91e22acd
AS		 15078 }
15079
15080 /* If out_attr was copied from in_attr then it won't have a type yet. */
15081 if (in_attr[i].type && !out_attr[i].type)
15082 out_attr[i].type = in_attr[i].type;
ee065d83
PB		 15083 }
15084
104d59d1 15085 /* Merge Tag_compatibility attributes and any common GNU ones. */
50e03d47 15086 if (!_bfd_elf_merge_object_attributes (ibfd, info))
5488d830 15087 return FALSE;
ee065d83 15088
104d59d1 15089 /* Check for any attributes not known on ARM. */
e8b36cd1 15090 result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd);
91e22acd 15091
91e22acd 15092 return result;
252b5132
RH		 15093}
15094
3a4a14e9
PB		 15095
15096/* Return TRUE if the two EABI versions are incompatible. */
15097
15098static bfd_boolean
15099elf32_arm_versions_compatible (unsigned iver, unsigned over)
15100{
15101 /* v4 and v5 are the same spec before and after it was released,
15102 so allow mixing them. */
15103 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
15104 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
15105 return TRUE;
15106
15107 return (iver == over);
15108}
15109
252b5132
RH		 15110/* Merge backend specific data from an object file to the output
15111 object file when linking. */
9b485d32 15112
b34976b6 15113static bfd_boolean
50e03d47 15114elf32_arm_merge_private_bfd_data (bfd *, struct bfd_link_info *);
252b5132 15115
9b485d32
NC		 15116/* Display the flags field. */
15117
b34976b6 15118static bfd_boolean
57e8b36a 15119elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
252b5132 15120{
fc830a83
NC		 15121 FILE * file = (FILE *) ptr;
15122 unsigned long flags;
252b5132
RH		 15123
15124 BFD_ASSERT (abfd != NULL && ptr != NULL);
15125
15126 /* Print normal ELF private data. */
15127 _bfd_elf_print_private_bfd_data (abfd, ptr);
15128
fc830a83 15129 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC		 15130 /* Ignore init flag - it may not be set, despite the flags field
15131 containing valid data. */
252b5132 15132
9b485d32 15133 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 15134
fc830a83
NC		 15135 switch (EF_ARM_EABI_VERSION (flags))
15136 {
15137 case EF_ARM_EABI_UNKNOWN:
4cc11e76 15138 /* The following flag bits are GNU extensions and not part of the
fc830a83
NC		 15139 official ARM ELF extended ABI. Hence they are only decoded if
15140 the EABI version is not set. */
fd2ec330 15141 if (flags & EF_ARM_INTERWORK)
9b485d32 15142 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 15143
fd2ec330 15144 if (flags & EF_ARM_APCS_26)
6c571f00 15145 fprintf (file, " [APCS-26]");
fc830a83 15146 else
6c571f00 15147 fprintf (file, " [APCS-32]");
9a5aca8c 15148
96a846ea
RE		 15149 if (flags & EF_ARM_VFP_FLOAT)
15150 fprintf (file, _(" [VFP float format]"));
fde78edd
NC		 15151 else if (flags & EF_ARM_MAVERICK_FLOAT)
15152 fprintf (file, _(" [Maverick float format]"));
96a846ea
RE		 15153 else
15154 fprintf (file, _(" [FPA float format]"));
15155
fd2ec330 15156 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 15157 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 15158
fd2ec330 15159 if (flags & EF_ARM_PIC)
9b485d32 15160 fprintf (file, _(" [position independent]"));
fc830a83 15161
fd2ec330 15162 if (flags & EF_ARM_NEW_ABI)
9b485d32 15163 fprintf (file, _(" [new ABI]"));
9a5aca8c 15164
fd2ec330 15165 if (flags & EF_ARM_OLD_ABI)
9b485d32 15166 fprintf (file, _(" [old ABI]"));
9a5aca8c 15167
fd2ec330 15168 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 15169 fprintf (file, _(" [software FP]"));
9a5aca8c 15170
96a846ea
RE		 15171 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
15172 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
fde78edd
NC		 15173 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
15174 | EF_ARM_MAVERICK_FLOAT);
fc830a83 15175 break;
9a5aca8c 15176
fc830a83 15177 case EF_ARM_EABI_VER1:
9b485d32 15178 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 15179
fc830a83 15180 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 15181 fprintf (file, _(" [sorted symbol table]"));
fc830a83 15182 else
9b485d32 15183 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 15184
fc830a83
NC		 15185 flags &= ~ EF_ARM_SYMSARESORTED;
15186 break;
9a5aca8c 15187
fd2ec330
PB		 15188 case EF_ARM_EABI_VER2:
15189 fprintf (file, _(" [Version2 EABI]"));
15190
15191 if (flags & EF_ARM_SYMSARESORTED)
15192 fprintf (file, _(" [sorted symbol table]"));
15193 else
15194 fprintf (file, _(" [unsorted symbol table]"));
15195
15196 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
15197 fprintf (file, _(" [dynamic symbols use segment index]"));
15198
15199 if (flags & EF_ARM_MAPSYMSFIRST)
15200 fprintf (file, _(" [mapping symbols precede others]"));
15201
99e4ae17 15202 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB		 15203 | EF_ARM_MAPSYMSFIRST);
15204 break;
15205
d507cf36
PB		 15206 case EF_ARM_EABI_VER3:
15207 fprintf (file, _(" [Version3 EABI]"));
8cb51566
PB		 15208 break;
15209
15210 case EF_ARM_EABI_VER4:
15211 fprintf (file, _(" [Version4 EABI]"));
3a4a14e9 15212 goto eabi;
d507cf36 15213
3a4a14e9
PB		 15214 case EF_ARM_EABI_VER5:
15215 fprintf (file, _(" [Version5 EABI]"));
3bfcb652
NC		 15216
15217 if (flags & EF_ARM_ABI_FLOAT_SOFT)
15218 fprintf (file, _(" [soft-float ABI]"));
15219
15220 if (flags & EF_ARM_ABI_FLOAT_HARD)
15221 fprintf (file, _(" [hard-float ABI]"));
15222
15223 flags &= ~(EF_ARM_ABI_FLOAT_SOFT | EF_ARM_ABI_FLOAT_HARD);
15224
3a4a14e9 15225 eabi:
d507cf36
PB		 15226 if (flags & EF_ARM_BE8)
15227 fprintf (file, _(" [BE8]"));
15228
15229 if (flags & EF_ARM_LE8)
15230 fprintf (file, _(" [LE8]"));
15231
15232 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
15233 break;
15234
fc830a83 15235 default:
9b485d32 15236 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC		 15237 break;
15238 }
252b5132 15239
fc830a83 15240 flags &= ~ EF_ARM_EABIMASK;
252b5132 15241
fc830a83 15242 if (flags & EF_ARM_RELEXEC)
9b485d32 15243 fprintf (file, _(" [relocatable executable]"));
252b5132 15244
18a20338
CL		 15245 if (flags & EF_ARM_PIC)
15246 fprintf (file, _(" [position independent]"));
15247
15248 if (elf_elfheader (abfd)->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC)
15249 fprintf (file, _(" [FDPIC ABI supplement]"));
15250
15251 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_PIC);
fc830a83
NC		 15252
15253 if (flags)
9b485d32 15254 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 15255
252b5132
RH		 15256 fputc ('\n', file);
15257
b34976b6 15258 return TRUE;
252b5132
RH		 15259}
15260
15261static int
57e8b36a 15262elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
252b5132 15263{
2f0ca46a
NC		 15264 switch (ELF_ST_TYPE (elf_sym->st_info))
15265 {
15266 case STT_ARM_TFUNC:
15267 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 15268
2f0ca46a
NC		 15269 case STT_ARM_16BIT:
15270 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
15271 This allows us to distinguish between data used by Thumb instructions
15272 and non-data (which is probably code) inside Thumb regions of an
15273 executable. */
1a0eb693 15274 if (type != STT_OBJECT && type != STT_TLS)
2f0ca46a
NC		 15275 return ELF_ST_TYPE (elf_sym->st_info);
15276 break;
9a5aca8c 15277
ce855c42
NC		 15278 default:
15279 break;
2f0ca46a
NC		 15280 }
15281
15282 return type;
252b5132 15283}
f21f3fe0 15284
252b5132 15285static asection *
07adf181
AM		 15286elf32_arm_gc_mark_hook (asection *sec,
15287 struct bfd_link_info *info,
15288 Elf_Internal_Rela *rel,
15289 struct elf_link_hash_entry *h,
15290 Elf_Internal_Sym *sym)
252b5132
RH		 15291{
15292 if (h != NULL)
07adf181 15293 switch (ELF32_R_TYPE (rel->r_info))
252b5132
RH		 15294 {
15295 case R_ARM_GNU_VTINHERIT:
15296 case R_ARM_GNU_VTENTRY:
07adf181
AM		 15297 return NULL;
15298 }
9ad5cbcf 15299
07adf181 15300 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH		 15301}
15302
780a67af
NC		 15303/* Look through the relocs for a section during the first phase. */
15304
b34976b6 15305static bfd_boolean
57e8b36a
NC		 15306elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
15307 asection *sec, const Elf_Internal_Rela *relocs)
252b5132 15308{
b34976b6
AM		 15309 Elf_Internal_Shdr *symtab_hdr;
15310 struct elf_link_hash_entry **sym_hashes;
b34976b6
AM		 15311 const Elf_Internal_Rela *rel;
15312 const Elf_Internal_Rela *rel_end;
15313 bfd *dynobj;
5e681ec4 15314 asection *sreloc;
5e681ec4 15315 struct elf32_arm_link_hash_table *htab;
f6e32f6d
RS		 15316 bfd_boolean call_reloc_p;
15317 bfd_boolean may_become_dynamic_p;
15318 bfd_boolean may_need_local_target_p;
ce98a316 15319 unsigned long nsyms;
9a5aca8c 15320
0e1862bb 15321 if (bfd_link_relocatable (info))
b34976b6 15322 return TRUE;
9a5aca8c 15323
0ffa91dd
NC		 15324 BFD_ASSERT (is_arm_elf (abfd));
15325
5e681ec4 15326 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 15327 if (htab == NULL)
15328 return FALSE;
15329
5e681ec4 15330 sreloc = NULL;
9a5aca8c 15331
67687978
PB		 15332 /* Create dynamic sections for relocatable executables so that we can
15333 copy relocations. */
15334 if (htab->root.is_relocatable_executable
15335 && ! htab->root.dynamic_sections_created)
15336 {
15337 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
15338 return FALSE;
15339 }
15340
cbc704f3
RS		 15341 if (htab->root.dynobj == NULL)
15342 htab->root.dynobj = abfd;
34e77a92
RS		 15343 if (!create_ifunc_sections (info))
15344 return FALSE;
cbc704f3
RS		 15345
15346 dynobj = htab->root.dynobj;
15347
0ffa91dd 15348 symtab_hdr = & elf_symtab_hdr (abfd);
252b5132 15349 sym_hashes = elf_sym_hashes (abfd);
ce98a316 15350 nsyms = NUM_SHDR_ENTRIES (symtab_hdr);
b38cadfb 15351
252b5132
RH		 15352 rel_end = relocs + sec->reloc_count;
15353 for (rel = relocs; rel < rel_end; rel++)
15354 {
34e77a92 15355 Elf_Internal_Sym *isym;
252b5132 15356 struct elf_link_hash_entry *h;
b7693d02 15357 struct elf32_arm_link_hash_entry *eh;
d42c267e 15358 unsigned int r_symndx;
eb043451 15359 int r_type;
9a5aca8c 15360
252b5132 15361 r_symndx = ELF32_R_SYM (rel->r_info);
eb043451 15362 r_type = ELF32_R_TYPE (rel->r_info);
eb043451 15363 r_type = arm_real_reloc_type (htab, r_type);
ba93b8ac 15364
ce98a316
NC		 15365 if (r_symndx >= nsyms
15366 /* PR 9934: It is possible to have relocations that do not
15367 refer to symbols, thus it is also possible to have an
15368 object file containing relocations but no symbol table. */
cf35638d 15369 && (r_symndx > STN_UNDEF || nsyms > 0))
ba93b8ac 15370 {
871b3ab2 15371 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd,
4eca0228 15372 r_symndx);
ba93b8ac
DJ		 15373 return FALSE;
15374 }
15375
34e77a92
RS		 15376 h = NULL;
15377 isym = NULL;
15378 if (nsyms > 0)
973a3492 15379 {
34e77a92
RS		 15380 if (r_symndx < symtab_hdr->sh_info)
15381 {
15382 /* A local symbol. */
15383 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
15384 abfd, r_symndx);
15385 if (isym == NULL)
15386 return FALSE;
15387 }
15388 else
15389 {
15390 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
15391 while (h->root.type == bfd_link_hash_indirect
15392 || h->root.type == bfd_link_hash_warning)
15393 h = (struct elf_link_hash_entry *) h->root.u.i.link;
15394 }
973a3492 15395 }
9a5aca8c 15396
b7693d02
DJ		 15397 eh = (struct elf32_arm_link_hash_entry *) h;
15398
f6e32f6d
RS		 15399 call_reloc_p = FALSE;
15400 may_become_dynamic_p = FALSE;
15401 may_need_local_target_p = FALSE;
15402
0855e32b
NS		 15403 /* Could be done earlier, if h were already available. */
15404 r_type = elf32_arm_tls_transition (info, r_type, h);
eb043451 15405 switch (r_type)
99059e56 15406 {
e8b09b87
CL		 15407 case R_ARM_GOTOFFFUNCDESC:
15408 {
15409 if (h == NULL)
15410 {
15411 if (!elf32_arm_allocate_local_sym_info (abfd))
15412 return FALSE;
15413 elf32_arm_local_fdpic_cnts(abfd)[r_symndx].gotofffuncdesc_cnt += 1;
15414 elf32_arm_local_fdpic_cnts(abfd)[r_symndx].funcdesc_offset = -1;
15415 }
15416 else
15417 {
15418 eh->fdpic_cnts.gotofffuncdesc_cnt++;
15419 }
15420 }
15421 break;
15422
15423 case R_ARM_GOTFUNCDESC:
15424 {
15425 if (h == NULL)
15426 {
15427 /* Such a relocation is not supposed to be generated
15428 by gcc on a static function. */
15429 /* Anyway if needed it could be handled. */
15430 abort();
15431 }
15432 else
15433 {
15434 eh->fdpic_cnts.gotfuncdesc_cnt++;
15435 }
15436 }
15437 break;
15438
15439 case R_ARM_FUNCDESC:
15440 {
15441 if (h == NULL)
15442 {
15443 if (!elf32_arm_allocate_local_sym_info (abfd))
15444 return FALSE;
15445 elf32_arm_local_fdpic_cnts(abfd)[r_symndx].funcdesc_cnt += 1;
15446 elf32_arm_local_fdpic_cnts(abfd)[r_symndx].funcdesc_offset = -1;
15447 }
15448 else
15449 {
15450 eh->fdpic_cnts.funcdesc_cnt++;
15451 }
15452 }
15453 break;
15454
5e681ec4 15455 case R_ARM_GOT32:
eb043451 15456 case R_ARM_GOT_PREL:
ba93b8ac 15457 case R_ARM_TLS_GD32:
5c5a4843 15458 case R_ARM_TLS_GD32_FDPIC:
ba93b8ac 15459 case R_ARM_TLS_IE32:
5c5a4843 15460 case R_ARM_TLS_IE32_FDPIC:
0855e32b
NS		 15461 case R_ARM_TLS_GOTDESC:
15462 case R_ARM_TLS_DESCSEQ:
15463 case R_ARM_THM_TLS_DESCSEQ:
15464 case R_ARM_TLS_CALL:
15465 case R_ARM_THM_TLS_CALL:
5e681ec4 15466 /* This symbol requires a global offset table entry. */
ba93b8ac
DJ		 15467 {
15468 int tls_type, old_tls_type;
5e681ec4 15469
ba93b8ac
DJ		 15470 switch (r_type)
15471 {
15472 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
5c5a4843 15473 case R_ARM_TLS_GD32_FDPIC: tls_type = GOT_TLS_GD; break;
b38cadfb 15474
ba93b8ac 15475 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
5c5a4843 15476 case R_ARM_TLS_IE32_FDPIC: tls_type = GOT_TLS_IE; break;
b38cadfb 15477
0855e32b
NS		 15478 case R_ARM_TLS_GOTDESC:
15479 case R_ARM_TLS_CALL: case R_ARM_THM_TLS_CALL:
15480 case R_ARM_TLS_DESCSEQ: case R_ARM_THM_TLS_DESCSEQ:
15481 tls_type = GOT_TLS_GDESC; break;
b38cadfb 15482
ba93b8ac
DJ		 15483 default: tls_type = GOT_NORMAL; break;
15484 }
252b5132 15485
0e1862bb 15486 if (!bfd_link_executable (info) && (tls_type & GOT_TLS_IE))
eea6dad2
KM		 15487 info->flags |= DF_STATIC_TLS;
15488
ba93b8ac
DJ		 15489 if (h != NULL)
15490 {
15491 h->got.refcount++;
15492 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
15493 }
15494 else
15495 {
ba93b8ac 15496 /* This is a global offset table entry for a local symbol. */
34e77a92
RS		 15497 if (!elf32_arm_allocate_local_sym_info (abfd))
15498 return FALSE;
15499 elf_local_got_refcounts (abfd)[r_symndx] += 1;
ba93b8ac
DJ		 15500 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
15501 }
15502
0855e32b 15503 /* If a variable is accessed with both tls methods, two
99059e56 15504 slots may be created. */
0855e32b
NS		 15505 if (GOT_TLS_GD_ANY_P (old_tls_type)
15506 && GOT_TLS_GD_ANY_P (tls_type))
15507 tls_type |= old_tls_type;
15508
15509 /* We will already have issued an error message if there
15510 is a TLS/non-TLS mismatch, based on the symbol
15511 type. So just combine any TLS types needed. */
ba93b8ac
DJ		 15512 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
15513 && tls_type != GOT_NORMAL)
15514 tls_type |= old_tls_type;
15515
0855e32b 15516 /* If the symbol is accessed in both IE and GDESC
99059e56
RM		 15517 method, we're able to relax. Turn off the GDESC flag,
15518 without messing up with any other kind of tls types
6a631e86 15519 that may be involved. */
0855e32b
NS		 15520 if ((tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GDESC))
15521 tls_type &= ~GOT_TLS_GDESC;
15522
ba93b8ac
DJ		 15523 if (old_tls_type != tls_type)
15524 {
15525 if (h != NULL)
15526 elf32_arm_hash_entry (h)->tls_type = tls_type;
15527 else
15528 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
15529 }
15530 }
8029a119 15531 /* Fall through. */
ba93b8ac
DJ		 15532
15533 case R_ARM_TLS_LDM32:
5c5a4843
CL		 15534 case R_ARM_TLS_LDM32_FDPIC:
15535 if (r_type == R_ARM_TLS_LDM32 || r_type == R_ARM_TLS_LDM32_FDPIC)
ba93b8ac 15536 htab->tls_ldm_got.refcount++;
8029a119 15537 /* Fall through. */
252b5132 15538
c19d1205 15539 case R_ARM_GOTOFF32:
5e681ec4 15540 case R_ARM_GOTPC:
cbc704f3
RS		 15541 if (htab->root.sgot == NULL
15542 && !create_got_section (htab->root.dynobj, info))
15543 return FALSE;
252b5132
RH		 15544 break;
15545
252b5132 15546 case R_ARM_PC24:
7359ea65 15547 case R_ARM_PLT32:
5b5bb741
PB		 15548 case R_ARM_CALL:
15549 case R_ARM_JUMP24:
eb043451 15550 case R_ARM_PREL31:
c19d1205 15551 case R_ARM_THM_CALL:
bd97cb95
DJ		 15552 case R_ARM_THM_JUMP24:
15553 case R_ARM_THM_JUMP19:
f6e32f6d
RS		 15554 call_reloc_p = TRUE;
15555 may_need_local_target_p = TRUE;
15556 break;
15557
15558 case R_ARM_ABS12:
15559 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
15560 ldr __GOTT_INDEX__ offsets. */
15561 if (!htab->vxworks_p)
15562 {
15563 may_need_local_target_p = TRUE;
15564 break;
15565 }
aebf9be7 15566 else goto jump_over;
9eaff861 15567
f6e32f6d 15568 /* Fall through. */
39623e12 15569
96c23d59
JM		 15570 case R_ARM_MOVW_ABS_NC:
15571 case R_ARM_MOVT_ABS:
15572 case R_ARM_THM_MOVW_ABS_NC:
15573 case R_ARM_THM_MOVT_ABS:
0e1862bb 15574 if (bfd_link_pic (info))
96c23d59 15575 {
4eca0228 15576 _bfd_error_handler
871b3ab2 15577 (_("%pB: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
96c23d59
JM		 15578 abfd, elf32_arm_howto_table_1[r_type].name,
15579 (h) ? h->root.root.string : "a local symbol");
15580 bfd_set_error (bfd_error_bad_value);
15581 return FALSE;
15582 }
15583
15584 /* Fall through. */
39623e12
PB		 15585 case R_ARM_ABS32:
15586 case R_ARM_ABS32_NOI:
aebf9be7 15587 jump_over:
0e1862bb 15588 if (h != NULL && bfd_link_executable (info))
97323ad1
WN		 15589 {
15590 h->pointer_equality_needed = 1;
15591 }
15592 /* Fall through. */
39623e12
PB		 15593 case R_ARM_REL32:
15594 case R_ARM_REL32_NOI:
b6895b4f
PB		 15595 case R_ARM_MOVW_PREL_NC:
15596 case R_ARM_MOVT_PREL:
b6895b4f
PB		 15597 case R_ARM_THM_MOVW_PREL_NC:
15598 case R_ARM_THM_MOVT_PREL:
39623e12 15599
b7693d02 15600 /* Should the interworking branches be listed here? */
e8b09b87
CL		 15601 if ((bfd_link_pic (info) || htab->root.is_relocatable_executable
15602 || htab->fdpic_p)
34e77a92
RS		 15603 && (sec->flags & SEC_ALLOC) != 0)
15604 {
15605 if (h == NULL
469a3493 15606 && elf32_arm_howto_from_type (r_type)->pc_relative)
34e77a92
RS		 15607 {
15608 /* In shared libraries and relocatable executables,
15609 we treat local relative references as calls;
15610 see the related SYMBOL_CALLS_LOCAL code in
15611 allocate_dynrelocs. */
15612 call_reloc_p = TRUE;
15613 may_need_local_target_p = TRUE;
15614 }
15615 else
15616 /* We are creating a shared library or relocatable
15617 executable, and this is a reloc against a global symbol,
15618 or a non-PC-relative reloc against a local symbol.
15619 We may need to copy the reloc into the output. */
15620 may_become_dynamic_p = TRUE;
15621 }
f6e32f6d
RS		 15622 else
15623 may_need_local_target_p = TRUE;
252b5132
RH		 15624 break;
15625
99059e56
RM		 15626 /* This relocation describes the C++ object vtable hierarchy.
15627 Reconstruct it for later use during GC. */
15628 case R_ARM_GNU_VTINHERIT:
15629 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
15630 return FALSE;
15631 break;
15632
15633 /* This relocation describes which C++ vtable entries are actually
15634 used. Record for later use during GC. */
15635 case R_ARM_GNU_VTENTRY:
a0ea3a14 15636 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
99059e56
RM		 15637 return FALSE;
15638 break;
15639 }
f6e32f6d
RS		 15640
15641 if (h != NULL)
15642 {
15643 if (call_reloc_p)
15644 /* We may need a .plt entry if the function this reloc
15645 refers to is in a different object, regardless of the
15646 symbol's type. We can't tell for sure yet, because
15647 something later might force the symbol local. */
15648 h->needs_plt = 1;
15649 else if (may_need_local_target_p)
15650 /* If this reloc is in a read-only section, we might
15651 need a copy reloc. We can't check reliably at this
15652 stage whether the section is read-only, as input
15653 sections have not yet been mapped to output sections.
15654 Tentatively set the flag for now, and correct in
15655 adjust_dynamic_symbol. */
15656 h->non_got_ref = 1;
15657 }
15658
34e77a92
RS		 15659 if (may_need_local_target_p
15660 && (h != NULL || ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC))
f6e32f6d 15661 {
34e77a92
RS		 15662 union gotplt_union *root_plt;
15663 struct arm_plt_info *arm_plt;
15664 struct arm_local_iplt_info *local_iplt;
15665
15666 if (h != NULL)
15667 {
15668 root_plt = &h->plt;
15669 arm_plt = &eh->plt;
15670 }
15671 else
15672 {
15673 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
15674 if (local_iplt == NULL)
15675 return FALSE;
15676 root_plt = &local_iplt->root;
15677 arm_plt = &local_iplt->arm;
15678 }
15679
f6e32f6d
RS		 15680 /* If the symbol is a function that doesn't bind locally,
15681 this relocation will need a PLT entry. */
a8c887dd
NC		 15682 if (root_plt->refcount != -1)
15683 root_plt->refcount += 1;
34e77a92
RS		 15684
15685 if (!call_reloc_p)
15686 arm_plt->noncall_refcount++;
f6e32f6d
RS		 15687
15688 /* It's too early to use htab->use_blx here, so we have to
15689 record possible blx references separately from
15690 relocs that definitely need a thumb stub. */
15691
15692 if (r_type == R_ARM_THM_CALL)
34e77a92 15693 arm_plt->maybe_thumb_refcount += 1;
f6e32f6d
RS		 15694
15695 if (r_type == R_ARM_THM_JUMP24
15696 || r_type == R_ARM_THM_JUMP19)
34e77a92 15697 arm_plt->thumb_refcount += 1;
f6e32f6d
RS		 15698 }
15699
15700 if (may_become_dynamic_p)
15701 {
15702 struct elf_dyn_relocs *p, **head;
15703
15704 /* Create a reloc section in dynobj. */
15705 if (sreloc == NULL)
15706 {
15707 sreloc = _bfd_elf_make_dynamic_reloc_section
15708 (sec, dynobj, 2, abfd, ! htab->use_rel);
15709
15710 if (sreloc == NULL)
15711 return FALSE;
15712
15713 /* BPABI objects never have dynamic relocations mapped. */
15714 if (htab->symbian_p)
15715 {
15716 flagword flags;
15717
fd361982 15718 flags = bfd_section_flags (sreloc);
f6e32f6d 15719 flags &= ~(SEC_LOAD | SEC_ALLOC);
fd361982 15720 bfd_set_section_flags (sreloc, flags);
f6e32f6d
RS		 15721 }
15722 }
15723
15724 /* If this is a global symbol, count the number of
15725 relocations we need for this symbol. */
15726 if (h != NULL)
15727 head = &((struct elf32_arm_link_hash_entry *) h)->dyn_relocs;
15728 else
15729 {
34e77a92
RS		 15730 head = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym);
15731 if (head == NULL)
f6e32f6d 15732 return FALSE;
f6e32f6d
RS		 15733 }
15734
15735 p = *head;
15736 if (p == NULL || p->sec != sec)
15737 {
986f0783 15738 size_t amt = sizeof *p;
f6e32f6d
RS		 15739
15740 p = (struct elf_dyn_relocs *) bfd_alloc (htab->root.dynobj, amt);
15741 if (p == NULL)
15742 return FALSE;
15743 p->next = *head;
15744 *head = p;
15745 p->sec = sec;
15746 p->count = 0;
15747 p->pc_count = 0;
15748 }
15749
469a3493 15750 if (elf32_arm_howto_from_type (r_type)->pc_relative)
f6e32f6d
RS		 15751 p->pc_count += 1;
15752 p->count += 1;
e8b09b87
CL		 15753 if (h == NULL && htab->fdpic_p && !bfd_link_pic(info)
15754 && r_type != R_ARM_ABS32 && r_type != R_ARM_ABS32_NOI) {
15755 /* Here we only support R_ARM_ABS32 and R_ARM_ABS32_NOI
15756 that will become rofixup. */
15757 /* This is due to the fact that we suppose all will become rofixup. */
15758 fprintf(stderr, "FDPIC does not yet support %d relocation to become dynamic for executable\n", r_type);
15759 _bfd_error_handler
15760 (_("FDPIC does not yet support %s relocation"
15761 " to become dynamic for executable"),
15762 elf32_arm_howto_table_1[r_type].name);
15763 abort();
15764 }
f6e32f6d 15765 }
252b5132 15766 }
f21f3fe0 15767
b34976b6 15768 return TRUE;
252b5132
RH		 15769}
15770
9eaff861
AO		 15771static void
15772elf32_arm_update_relocs (asection *o,
15773 struct bfd_elf_section_reloc_data *reldata)
15774{
15775 void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *);
15776 void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
15777 const struct elf_backend_data *bed;
15778 _arm_elf_section_data *eado;
15779 struct bfd_link_order *p;
15780 bfd_byte *erela_head, *erela;
15781 Elf_Internal_Rela *irela_head, *irela;
15782 Elf_Internal_Shdr *rel_hdr;
15783 bfd *abfd;
15784 unsigned int count;
15785
15786 eado = get_arm_elf_section_data (o);
15787
15788 if (!eado || eado->elf.this_hdr.sh_type != SHT_ARM_EXIDX)
15789 return;
15790
15791 abfd = o->owner;
15792 bed = get_elf_backend_data (abfd);
15793 rel_hdr = reldata->hdr;
15794
15795 if (rel_hdr->sh_entsize == bed->s->sizeof_rel)
15796 {
15797 swap_in = bed->s->swap_reloc_in;
15798 swap_out = bed->s->swap_reloc_out;
15799 }
15800 else if (rel_hdr->sh_entsize == bed->s->sizeof_rela)
15801 {
15802 swap_in = bed->s->swap_reloca_in;
15803 swap_out = bed->s->swap_reloca_out;
15804 }
15805 else
15806 abort ();
15807
15808 erela_head = rel_hdr->contents;
15809 irela_head = (Elf_Internal_Rela *) bfd_zmalloc
15810 ((NUM_SHDR_ENTRIES (rel_hdr) + 1) * sizeof (*irela_head));
15811
15812 erela = erela_head;
15813 irela = irela_head;
15814 count = 0;
15815
15816 for (p = o->map_head.link_order; p; p = p->next)
15817 {
15818 if (p->type == bfd_section_reloc_link_order
15819 || p->type == bfd_symbol_reloc_link_order)
15820 {
15821 (*swap_in) (abfd, erela, irela);
15822 erela += rel_hdr->sh_entsize;
15823 irela++;
15824 count++;
15825 }
15826 else if (p->type == bfd_indirect_link_order)
15827 {
15828 struct bfd_elf_section_reloc_data *input_reldata;
15829 arm_unwind_table_edit *edit_list, *edit_tail;
15830 _arm_elf_section_data *eadi;
15831 bfd_size_type j;
15832 bfd_vma offset;
15833 asection *i;
15834
15835 i = p->u.indirect.section;
15836
15837 eadi = get_arm_elf_section_data (i);
15838 edit_list = eadi->u.exidx.unwind_edit_list;
15839 edit_tail = eadi->u.exidx.unwind_edit_tail;
539300fb 15840 offset = i->output_offset;
9eaff861
AO		 15841
15842 if (eadi->elf.rel.hdr &&
15843 eadi->elf.rel.hdr->sh_entsize == rel_hdr->sh_entsize)
15844 input_reldata = &eadi->elf.rel;
15845 else if (eadi->elf.rela.hdr &&
15846 eadi->elf.rela.hdr->sh_entsize == rel_hdr->sh_entsize)
15847 input_reldata = &eadi->elf.rela;
15848 else
15849 abort ();
15850
15851 if (edit_list)
15852 {
15853 for (j = 0; j < NUM_SHDR_ENTRIES (input_reldata->hdr); j++)
15854 {
15855 arm_unwind_table_edit *edit_node, *edit_next;
15856 bfd_vma bias;
c48182bf 15857 bfd_vma reloc_index;
9eaff861
AO		 15858
15859 (*swap_in) (abfd, erela, irela);
c48182bf 15860 reloc_index = (irela->r_offset - offset) / 8;
9eaff861
AO		 15861
15862 bias = 0;
15863 edit_node = edit_list;
15864 for (edit_next = edit_list;
c48182bf 15865 edit_next && edit_next->index <= reloc_index;
9eaff861
AO		 15866 edit_next = edit_node->next)
15867 {
15868 bias++;
15869 edit_node = edit_next;
15870 }
15871
15872 if (edit_node->type != DELETE_EXIDX_ENTRY
c48182bf 15873 || edit_node->index != reloc_index)
9eaff861
AO		 15874 {
15875 irela->r_offset -= bias * 8;
15876 irela++;
15877 count++;
15878 }
15879
15880 erela += rel_hdr->sh_entsize;
15881 }
15882
15883 if (edit_tail->type == INSERT_EXIDX_CANTUNWIND_AT_END)
15884 {
15885 /* New relocation entity. */
15886 asection *text_sec = edit_tail->linked_section;
15887 asection *text_out = text_sec->output_section;
15888 bfd_vma exidx_offset = offset + i->size - 8;
15889
15890 irela->r_addend = 0;
15891 irela->r_offset = exidx_offset;
15892 irela->r_info = ELF32_R_INFO
15893 (text_out->target_index, R_ARM_PREL31);
15894 irela++;
15895 count++;
15896 }
15897 }
15898 else
15899 {
15900 for (j = 0; j < NUM_SHDR_ENTRIES (input_reldata->hdr); j++)
15901 {
15902 (*swap_in) (abfd, erela, irela);
15903 erela += rel_hdr->sh_entsize;
15904 irela++;
15905 }
15906
15907 count += NUM_SHDR_ENTRIES (input_reldata->hdr);
15908 }
15909 }
15910 }
15911
15912 reldata->count = count;
15913 rel_hdr->sh_size = count * rel_hdr->sh_entsize;
15914
15915 erela = erela_head;
15916 irela = irela_head;
15917 while (count > 0)
15918 {
15919 (*swap_out) (abfd, irela, erela);
15920 erela += rel_hdr->sh_entsize;
15921 irela++;
15922 count--;
15923 }
15924
15925 free (irela_head);
15926
15927 /* Hashes are no longer valid. */
15928 free (reldata->hashes);
15929 reldata->hashes = NULL;
15930}
15931
6a5bb875 15932/* Unwinding tables are not referenced directly. This pass marks them as
4ba2ef8f
TP		 15933 required if the corresponding code section is marked. Similarly, ARMv8-M
15934 secure entry functions can only be referenced by SG veneers which are
15935 created after the GC process. They need to be marked in case they reside in
15936 their own section (as would be the case if code was compiled with
15937 -ffunction-sections). */
6a5bb875
PB		 15938
15939static bfd_boolean
906e58ca
NC		 15940elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
15941 elf_gc_mark_hook_fn gc_mark_hook)
6a5bb875
PB		 15942{
15943 bfd *sub;
15944 Elf_Internal_Shdr **elf_shdrp;
4ba2ef8f
TP		 15945 asection *cmse_sec;
15946 obj_attribute *out_attr;
15947 Elf_Internal_Shdr *symtab_hdr;
15948 unsigned i, sym_count, ext_start;
15949 const struct elf_backend_data *bed;
15950 struct elf_link_hash_entry **sym_hashes;
15951 struct elf32_arm_link_hash_entry *cmse_hash;
15952 bfd_boolean again, is_v8m, first_bfd_browse = TRUE;
bb32413f
SP		 15953 bfd_boolean debug_sec_need_to_be_marked = FALSE;
15954 asection *isec;
6a5bb875 15955
7f6ab9f8
AM		 15956 _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook);
15957
4ba2ef8f
TP		 15958 out_attr = elf_known_obj_attributes_proc (info->output_bfd);
15959 is_v8m = out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V8M_BASE
15960 && out_attr[Tag_CPU_arch_profile].i == 'M';
15961
6a5bb875
PB		 15962 /* Marking EH data may cause additional code sections to be marked,
15963 requiring multiple passes. */
15964 again = TRUE;
15965 while (again)
15966 {
15967 again = FALSE;
c72f2fb2 15968 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
6a5bb875
PB		 15969 {
15970 asection *o;
15971
0ffa91dd 15972 if (! is_arm_elf (sub))
6a5bb875
PB		 15973 continue;
15974
15975 elf_shdrp = elf_elfsections (sub);
15976 for (o = sub->sections; o != NULL; o = o->next)
15977 {
15978 Elf_Internal_Shdr *hdr;
0ffa91dd 15979
6a5bb875 15980 hdr = &elf_section_data (o)->this_hdr;
4fbb74a6
AM		 15981 if (hdr->sh_type == SHT_ARM_EXIDX
15982 && hdr->sh_link
15983 && hdr->sh_link < elf_numsections (sub)
6a5bb875
PB		 15984 && !o->gc_mark
15985 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
15986 {
15987 again = TRUE;
15988 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
15989 return FALSE;
15990 }
15991 }
4ba2ef8f
TP		 15992
15993 /* Mark section holding ARMv8-M secure entry functions. We mark all
15994 of them so no need for a second browsing. */
15995 if (is_v8m && first_bfd_browse)
15996 {
15997 sym_hashes = elf_sym_hashes (sub);
15998 bed = get_elf_backend_data (sub);
15999 symtab_hdr = &elf_tdata (sub)->symtab_hdr;
16000 sym_count = symtab_hdr->sh_size / bed->s->sizeof_sym;
16001 ext_start = symtab_hdr->sh_info;
16002
16003 /* Scan symbols. */
16004 for (i = ext_start; i < sym_count; i++)
16005 {
16006 cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]);
16007
16008 /* Assume it is a special symbol. If not, cmse_scan will
16009 warn about it and user can do something about it. */
baf46cd7
AM		 16010 if (CONST_STRNEQ (cmse_hash->root.root.root.string,
16011 CMSE_PREFIX))
4ba2ef8f
TP		 16012 {
16013 cmse_sec = cmse_hash->root.root.u.def.section;
5025eb7c
AO		 16014 if (!cmse_sec->gc_mark
16015 && !_bfd_elf_gc_mark (info, cmse_sec, gc_mark_hook))
4ba2ef8f 16016 return FALSE;
bb32413f
SP		 16017 /* The debug sections related to these secure entry
16018 functions are marked on enabling below flag. */
16019 debug_sec_need_to_be_marked = TRUE;
4ba2ef8f
TP		 16020 }
16021 }
bb32413f
SP		 16022
16023 if (debug_sec_need_to_be_marked)
16024 {
16025 /* Looping over all the sections of the object file containing
16026 Armv8-M secure entry functions and marking all the debug
16027 sections. */
16028 for (isec = sub->sections; isec != NULL; isec = isec->next)
16029 {
16030 /* If not a debug sections, skip it. */
16031 if (!isec->gc_mark && (isec->flags & SEC_DEBUGGING))
16032 isec->gc_mark = 1 ;
16033 }
16034 debug_sec_need_to_be_marked = FALSE;
16035 }
4ba2ef8f 16036 }
6a5bb875 16037 }
4ba2ef8f 16038 first_bfd_browse = FALSE;
6a5bb875
PB		 16039 }
16040
16041 return TRUE;
16042}
16043
3c9458e9
NC		 16044/* Treat mapping symbols as special target symbols. */
16045
16046static bfd_boolean
16047elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
16048{
b0796911
PB		 16049 return bfd_is_arm_special_symbol_name (sym->name,
16050 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
3c9458e9
NC		 16051}
16052
e7679060
AM		 16053/* If the ELF symbol SYM might be a function in SEC, return the
16054 function size and set *CODE_OFF to the function's entry point,
16055 otherwise return zero. */
252b5132 16056
e7679060
AM		 16057static bfd_size_type
16058elf32_arm_maybe_function_sym (const asymbol *sym, asection *sec,
16059 bfd_vma *code_off)
16060{
16061 bfd_size_type size;
252b5132 16062
e7679060
AM		 16063 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
16064 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
16065 || sym->section != sec)
16066 return 0;
252b5132 16067
e7679060
AM		 16068 if (!(sym->flags & BSF_SYNTHETIC))
16069 switch (ELF_ST_TYPE (((elf_symbol_type *) sym)->internal_elf_sym.st_info))
16070 {
252b5132
RH		 16071 case STT_FUNC:
16072 case STT_ARM_TFUNC:
9d2da7ca 16073 case STT_NOTYPE:
252b5132 16074 break;
e7679060
AM		 16075 default:
16076 return 0;
16077 }
0367ecfb 16078
e7679060
AM		 16079 if ((sym->flags & BSF_LOCAL)
16080 && bfd_is_arm_special_symbol_name (sym->name,
16081 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
16082 return 0;
0367ecfb 16083
e7679060
AM		 16084 *code_off = sym->value;
16085 size = 0;
16086 if (!(sym->flags & BSF_SYNTHETIC))
16087 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
16088 if (size == 0)
16089 size = 1;
16090 return size;
252b5132
RH		 16091}
16092
4ab527b0 16093static bfd_boolean
07d6d2b8 16094elf32_arm_find_inliner_info (bfd * abfd,
4ab527b0
FF		 16095 const char ** filename_ptr,
16096 const char ** functionname_ptr,
16097 unsigned int * line_ptr)
16098{
16099 bfd_boolean found;
16100 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
16101 functionname_ptr, line_ptr,
16102 & elf_tdata (abfd)->dwarf2_find_line_info);
16103 return found;
16104}
16105
63c1f59d
AM		 16106/* Find dynamic relocs for H that apply to read-only sections. */
16107
16108static asection *
16109readonly_dynrelocs (struct elf_link_hash_entry *h)
16110{
16111 struct elf_dyn_relocs *p;
16112
16113 for (p = elf32_arm_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
16114 {
16115 asection *s = p->sec->output_section;
16116
16117 if (s != NULL && (s->flags & SEC_READONLY) != 0)
16118 return p->sec;
16119 }
16120 return NULL;
16121}
16122
252b5132
RH		 16123/* Adjust a symbol defined by a dynamic object and referenced by a
16124 regular object. The current definition is in some section of the
16125 dynamic object, but we're not including those sections. We have to
16126 change the definition to something the rest of the link can
16127 understand. */
16128
b34976b6 16129static bfd_boolean
57e8b36a
NC		 16130elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
16131 struct elf_link_hash_entry * h)
252b5132
RH		 16132{
16133 bfd * dynobj;
5474d94f 16134 asection *s, *srel;
b7693d02 16135 struct elf32_arm_link_hash_entry * eh;
67687978 16136 struct elf32_arm_link_hash_table *globals;
252b5132 16137
67687978 16138 globals = elf32_arm_hash_table (info);
4dfe6ac6
NC		 16139 if (globals == NULL)
16140 return FALSE;
16141
252b5132
RH		 16142 dynobj = elf_hash_table (info)->dynobj;
16143
16144 /* Make sure we know what is going on here. */
16145 BFD_ASSERT (dynobj != NULL
f5385ebf 16146 && (h->needs_plt
34e77a92 16147 || h->type == STT_GNU_IFUNC
60d67dc8 16148 || h->is_weakalias
f5385ebf
AM		 16149 || (h->def_dynamic
16150 && h->ref_regular
16151 && !h->def_regular)));
252b5132 16152
b7693d02
DJ		 16153 eh = (struct elf32_arm_link_hash_entry *) h;
16154
252b5132
RH		 16155 /* If this is a function, put it in the procedure linkage table. We
16156 will fill in the contents of the procedure linkage table later,
16157 when we know the address of the .got section. */
34e77a92 16158 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
252b5132 16159 {
34e77a92
RS		 16160 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
16161 symbol binds locally. */
5e681ec4 16162 if (h->plt.refcount <= 0
34e77a92
RS		 16163 || (h->type != STT_GNU_IFUNC
16164 && (SYMBOL_CALLS_LOCAL (info, h)
16165 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
16166 && h->root.type == bfd_link_hash_undefweak))))
252b5132
RH		 16167 {
16168 /* This case can occur if we saw a PLT32 reloc in an input
5e681ec4
PB		 16169 file, but the symbol was never referred to by a dynamic
16170 object, or if all references were garbage collected. In
16171 such a case, we don't actually need to build a procedure
16172 linkage table, and we can just do a PC24 reloc instead. */
16173 h->plt.offset = (bfd_vma) -1;
34e77a92
RS		 16174 eh->plt.thumb_refcount = 0;
16175 eh->plt.maybe_thumb_refcount = 0;
16176 eh->plt.noncall_refcount = 0;
f5385ebf 16177 h->needs_plt = 0;
252b5132
RH		 16178 }
16179
b34976b6 16180 return TRUE;
252b5132 16181 }
5e681ec4 16182 else
b7693d02
DJ		 16183 {
16184 /* It's possible that we incorrectly decided a .plt reloc was
16185 needed for an R_ARM_PC24 or similar reloc to a non-function sym
16186 in check_relocs. We can't decide accurately between function
16187 and non-function syms in check-relocs; Objects loaded later in
16188 the link may change h->type. So fix it now. */
16189 h->plt.offset = (bfd_vma) -1;
34e77a92
RS		 16190 eh->plt.thumb_refcount = 0;
16191 eh->plt.maybe_thumb_refcount = 0;
16192 eh->plt.noncall_refcount = 0;
b7693d02 16193 }
252b5132
RH		 16194
16195 /* If this is a weak symbol, and there is a real definition, the
16196 processor independent code will have arranged for us to see the
16197 real definition first, and we can just use the same value. */
60d67dc8 16198 if (h->is_weakalias)
252b5132 16199 {
60d67dc8
AM		 16200 struct elf_link_hash_entry *def = weakdef (h);
16201 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
16202 h->root.u.def.section = def->root.u.def.section;
16203 h->root.u.def.value = def->root.u.def.value;
b34976b6 16204 return TRUE;
252b5132
RH		 16205 }
16206
ba93b8ac
DJ		 16207 /* If there are no non-GOT references, we do not need a copy
16208 relocation. */
16209 if (!h->non_got_ref)
16210 return TRUE;
16211
252b5132
RH		 16212 /* This is a reference to a symbol defined by a dynamic object which
16213 is not a function. */
16214
16215 /* If we are creating a shared library, we must presume that the
16216 only references to the symbol are via the global offset table.
16217 For such cases we need not do anything here; the relocations will
67687978
PB		 16218 be handled correctly by relocate_section. Relocatable executables
16219 can reference data in shared objects directly, so we don't need to
16220 do anything here. */
0e1862bb 16221 if (bfd_link_pic (info) || globals->root.is_relocatable_executable)
b34976b6 16222 return TRUE;
252b5132
RH		 16223
16224 /* We must allocate the symbol in our .dynbss section, which will
16225 become part of the .bss section of the executable. There will be
16226 an entry for this symbol in the .dynsym section. The dynamic
16227 object will contain position independent code, so all references
16228 from the dynamic object to this symbol will go through the global
16229 offset table. The dynamic linker will use the .dynsym entry to
16230 determine the address it must put in the global offset table, so
16231 both the dynamic object and the regular object will refer to the
16232 same memory location for the variable. */
5522f910
NC		 16233 /* If allowed, we must generate a R_ARM_COPY reloc to tell the dynamic
16234 linker to copy the initial value out of the dynamic object and into
16235 the runtime process image. We need to remember the offset into the
00a97672 16236 .rel(a).bss section we are going to use. */
5474d94f
AM		 16237 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
16238 {
16239 s = globals->root.sdynrelro;
16240 srel = globals->root.sreldynrelro;
16241 }
16242 else
16243 {
16244 s = globals->root.sdynbss;
16245 srel = globals->root.srelbss;
16246 }
5522f910
NC		 16247 if (info->nocopyreloc == 0
16248 && (h->root.u.def.section->flags & SEC_ALLOC) != 0
5522f910 16249 && h->size != 0)
252b5132 16250 {
47beaa6a 16251 elf32_arm_allocate_dynrelocs (info, srel, 1);
f5385ebf 16252 h->needs_copy = 1;
252b5132
RH		 16253 }
16254
6cabe1ea 16255 return _bfd_elf_adjust_dynamic_copy (info, h, s);
252b5132
RH		 16256}
16257
5e681ec4
PB		 16258/* Allocate space in .plt, .got and associated reloc sections for
16259 dynamic relocs. */
16260
16261static bfd_boolean
47beaa6a 16262allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf)
5e681ec4
PB		 16263{
16264 struct bfd_link_info *info;
16265 struct elf32_arm_link_hash_table *htab;
16266 struct elf32_arm_link_hash_entry *eh;
0bdcacaf 16267 struct elf_dyn_relocs *p;
5e681ec4
PB		 16268
16269 if (h->root.type == bfd_link_hash_indirect)
16270 return TRUE;
16271
e6a6bb22
AM		 16272 eh = (struct elf32_arm_link_hash_entry *) h;
16273
5e681ec4
PB		 16274 info = (struct bfd_link_info *) inf;
16275 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 16276 if (htab == NULL)
16277 return FALSE;
5e681ec4 16278
34e77a92 16279 if ((htab->root.dynamic_sections_created || h->type == STT_GNU_IFUNC)
5e681ec4
PB		 16280 && h->plt.refcount > 0)
16281 {
16282 /* Make sure this symbol is output as a dynamic symbol.
16283 Undefined weak syms won't yet be marked as dynamic. */
6c699715
RL		 16284 if (h->dynindx == -1 && !h->forced_local
16285 && h->root.type == bfd_link_hash_undefweak)
5e681ec4 16286 {
c152c796 16287 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB		 16288 return FALSE;
16289 }
16290
34e77a92
RS		 16291 /* If the call in the PLT entry binds locally, the associated
16292 GOT entry should use an R_ARM_IRELATIVE relocation instead of
16293 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
16294 than the .plt section. */
16295 if (h->type == STT_GNU_IFUNC && SYMBOL_CALLS_LOCAL (info, h))
16296 {
16297 eh->is_iplt = 1;
16298 if (eh->plt.noncall_refcount == 0
16299 && SYMBOL_REFERENCES_LOCAL (info, h))
16300 /* All non-call references can be resolved directly.
16301 This means that they can (and in some cases, must)
16302 resolve directly to the run-time target, rather than
16303 to the PLT. That in turns means that any .got entry
16304 would be equal to the .igot.plt entry, so there's
16305 no point having both. */
16306 h->got.refcount = 0;
16307 }
16308
0e1862bb 16309 if (bfd_link_pic (info)
34e77a92 16310 || eh->is_iplt
7359ea65 16311 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5e681ec4 16312 {
34e77a92 16313 elf32_arm_allocate_plt_entry (info, eh->is_iplt, &h->plt, &eh->plt);
b7693d02 16314
5e681ec4
PB		 16315 /* If this symbol is not defined in a regular file, and we are
16316 not generating a shared library, then set the symbol to this
16317 location in the .plt. This is required to make function
16318 pointers compare as equal between the normal executable and
16319 the shared library. */
0e1862bb 16320 if (! bfd_link_pic (info)
f5385ebf 16321 && !h->def_regular)
5e681ec4 16322 {
34e77a92 16323 h->root.u.def.section = htab->root.splt;
5e681ec4 16324 h->root.u.def.value = h->plt.offset;
5e681ec4 16325
67d74e43
DJ		 16326 /* Make sure the function is not marked as Thumb, in case
16327 it is the target of an ABS32 relocation, which will
16328 point to the PLT entry. */
39d911fc 16329 ARM_SET_SYM_BRANCH_TYPE (h->target_internal, ST_BRANCH_TO_ARM);
67d74e43 16330 }
022f8312 16331
00a97672
RS		 16332 /* VxWorks executables have a second set of relocations for
16333 each PLT entry. They go in a separate relocation section,
16334 which is processed by the kernel loader. */
0e1862bb 16335 if (htab->vxworks_p && !bfd_link_pic (info))
00a97672
RS		 16336 {
16337 /* There is a relocation for the initial PLT entry:
16338 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
16339 if (h->plt.offset == htab->plt_header_size)
47beaa6a 16340 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 1);
00a97672
RS		 16341
16342 /* There are two extra relocations for each subsequent
16343 PLT entry: an R_ARM_32 relocation for the GOT entry,
16344 and an R_ARM_32 relocation for the PLT entry. */
47beaa6a 16345 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 2);
00a97672 16346 }
5e681ec4
PB		 16347 }
16348 else
16349 {
16350 h->plt.offset = (bfd_vma) -1;
f5385ebf 16351 h->needs_plt = 0;
5e681ec4
PB		 16352 }
16353 }
16354 else
16355 {
16356 h->plt.offset = (bfd_vma) -1;
f5385ebf 16357 h->needs_plt = 0;
5e681ec4
PB		 16358 }
16359
0855e32b
NS		 16360 eh = (struct elf32_arm_link_hash_entry *) h;
16361 eh->tlsdesc_got = (bfd_vma) -1;
16362
5e681ec4
PB		 16363 if (h->got.refcount > 0)
16364 {
16365 asection *s;
16366 bfd_boolean dyn;
ba93b8ac
DJ		 16367 int tls_type = elf32_arm_hash_entry (h)->tls_type;
16368 int indx;
5e681ec4
PB		 16369
16370 /* Make sure this symbol is output as a dynamic symbol.
16371 Undefined weak syms won't yet be marked as dynamic. */
e8b09b87 16372 if (htab->root.dynamic_sections_created && h->dynindx == -1 && !h->forced_local
6c699715 16373 && h->root.type == bfd_link_hash_undefweak)
5e681ec4 16374 {
c152c796 16375 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB		 16376 return FALSE;
16377 }
16378
e5a52504
MM		 16379 if (!htab->symbian_p)
16380 {
362d30a1 16381 s = htab->root.sgot;
e5a52504 16382 h->got.offset = s->size;
ba93b8ac
DJ		 16383
16384 if (tls_type == GOT_UNKNOWN)
16385 abort ();
16386
16387 if (tls_type == GOT_NORMAL)
16388 /* Non-TLS symbols need one GOT slot. */
16389 s->size += 4;
16390 else
16391 {
99059e56
RM		 16392 if (tls_type & GOT_TLS_GDESC)
16393 {
0855e32b 16394 /* R_ARM_TLS_DESC needs 2 GOT slots. */
99059e56 16395 eh->tlsdesc_got
0855e32b
NS		 16396 = (htab->root.sgotplt->size
16397 - elf32_arm_compute_jump_table_size (htab));
99059e56
RM		 16398 htab->root.sgotplt->size += 8;
16399 h->got.offset = (bfd_vma) -2;
34e77a92 16400 /* plt.got_offset needs to know there's a TLS_DESC
0855e32b 16401 reloc in the middle of .got.plt. */
99059e56
RM		 16402 htab->num_tls_desc++;
16403 }
0855e32b 16404
ba93b8ac 16405 if (tls_type & GOT_TLS_GD)
0855e32b 16406 {
5c5a4843
CL		 16407 /* R_ARM_TLS_GD32 and R_ARM_TLS_GD32_FDPIC need two
16408 consecutive GOT slots. If the symbol is both GD
16409 and GDESC, got.offset may have been
16410 overwritten. */
0855e32b
NS		 16411 h->got.offset = s->size;
16412 s->size += 8;
16413 }
16414
ba93b8ac 16415 if (tls_type & GOT_TLS_IE)
5c5a4843
CL		 16416 /* R_ARM_TLS_IE32/R_ARM_TLS_IE32_FDPIC need one GOT
16417 slot. */
ba93b8ac
DJ		 16418 s->size += 4;
16419 }
16420
e5a52504 16421 dyn = htab->root.dynamic_sections_created;
ba93b8ac
DJ		 16422
16423 indx = 0;
0e1862bb
L		 16424 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
16425 bfd_link_pic (info),
16426 h)
16427 && (!bfd_link_pic (info)
ba93b8ac
DJ		 16428 || !SYMBOL_REFERENCES_LOCAL (info, h)))
16429 indx = h->dynindx;
16430
16431 if (tls_type != GOT_NORMAL
9cb09e33 16432 && (bfd_link_dll (info) || indx != 0)
ba93b8ac
DJ		 16433 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
16434 || h->root.type != bfd_link_hash_undefweak))
16435 {
16436 if (tls_type & GOT_TLS_IE)
47beaa6a 16437 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
ba93b8ac
DJ		 16438
16439 if (tls_type & GOT_TLS_GD)
47beaa6a 16440 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
ba93b8ac 16441
b38cadfb 16442 if (tls_type & GOT_TLS_GDESC)
0855e32b 16443 {
47beaa6a 16444 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
0855e32b
NS		 16445 /* GDESC needs a trampoline to jump to. */
16446 htab->tls_trampoline = -1;
16447 }
16448
16449 /* Only GD needs it. GDESC just emits one relocation per
16450 2 entries. */
b38cadfb 16451 if ((tls_type & GOT_TLS_GD) && indx != 0)
47beaa6a 16452 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
ba93b8ac 16453 }
e8b09b87
CL		 16454 else if (((indx != -1) || htab->fdpic_p)
16455 && !SYMBOL_REFERENCES_LOCAL (info, h))
b436d854
RS		 16456 {
16457 if (htab->root.dynamic_sections_created)
16458 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
16459 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
16460 }
34e77a92
RS		 16461 else if (h->type == STT_GNU_IFUNC
16462 && eh->plt.noncall_refcount == 0)
16463 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
16464 they all resolve dynamically instead. Reserve room for the
16465 GOT entry's R_ARM_IRELATIVE relocation. */
16466 elf32_arm_allocate_irelocs (info, htab->root.srelgot, 1);
0e1862bb 16467 else if (bfd_link_pic (info)
7f026732 16468 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
b436d854 16469 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
47beaa6a 16470 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
e8b09b87
CL		 16471 else if (htab->fdpic_p && tls_type == GOT_NORMAL)
16472 /* Reserve room for rofixup for FDPIC executable. */
16473 /* TLS relocs do not need space since they are completely
16474 resolved. */
16475 htab->srofixup->size += 4;
e5a52504 16476 }
5e681ec4
PB		 16477 }
16478 else
16479 h->got.offset = (bfd_vma) -1;
16480
e8b09b87
CL		 16481 /* FDPIC support. */
16482 if (eh->fdpic_cnts.gotofffuncdesc_cnt > 0)
16483 {
16484 /* Symbol musn't be exported. */
16485 if (h->dynindx != -1)
16486 abort();
16487
16488 /* We only allocate one function descriptor with its associated relocation. */
16489 if (eh->fdpic_cnts.funcdesc_offset == -1)
16490 {
16491 asection *s = htab->root.sgot;
16492
16493 eh->fdpic_cnts.funcdesc_offset = s->size;
16494 s->size += 8;
16495 /* We will add an R_ARM_FUNCDESC_VALUE relocation or two rofixups. */
16496 if (bfd_link_pic(info))
16497 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
16498 else
16499 htab->srofixup->size += 8;
16500 }
16501 }
16502
16503 if (eh->fdpic_cnts.gotfuncdesc_cnt > 0)
16504 {
16505 asection *s = htab->root.sgot;
16506
16507 if (htab->root.dynamic_sections_created && h->dynindx == -1
16508 && !h->forced_local)
16509 if (! bfd_elf_link_record_dynamic_symbol (info, h))
16510 return FALSE;
16511
16512 if (h->dynindx == -1)
16513 {
16514 /* We only allocate one function descriptor with its associated relocation. q */
16515 if (eh->fdpic_cnts.funcdesc_offset == -1)
16516 {
16517
16518 eh->fdpic_cnts.funcdesc_offset = s->size;
16519 s->size += 8;
16520 /* We will add an R_ARM_FUNCDESC_VALUE relocation or two rofixups. */
16521 if (bfd_link_pic(info))
16522 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
16523 else
16524 htab->srofixup->size += 8;
16525 }
16526 }
16527
16528 /* Add one entry into the GOT and a R_ARM_FUNCDESC or
16529 R_ARM_RELATIVE/rofixup relocation on it. */
16530 eh->fdpic_cnts.gotfuncdesc_offset = s->size;
16531 s->size += 4;
16532 if (h->dynindx == -1 && !bfd_link_pic(info))
4b24dd1a 16533 htab->srofixup->size += 4;
e8b09b87 16534 else
4b24dd1a 16535 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
e8b09b87
CL		 16536 }
16537
16538 if (eh->fdpic_cnts.funcdesc_cnt > 0)
16539 {
16540 if (htab->root.dynamic_sections_created && h->dynindx == -1
16541 && !h->forced_local)
16542 if (! bfd_elf_link_record_dynamic_symbol (info, h))
16543 return FALSE;
16544
16545 if (h->dynindx == -1)
16546 {
16547 /* We only allocate one function descriptor with its associated relocation. */
16548 if (eh->fdpic_cnts.funcdesc_offset == -1)
16549 {
16550 asection *s = htab->root.sgot;
16551
16552 eh->fdpic_cnts.funcdesc_offset = s->size;
16553 s->size += 8;
16554 /* We will add an R_ARM_FUNCDESC_VALUE relocation or two rofixups. */
16555 if (bfd_link_pic(info))
16556 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
16557 else
16558 htab->srofixup->size += 8;
16559 }
16560 }
16561 if (h->dynindx == -1 && !bfd_link_pic(info))
16562 {
16563 /* For FDPIC executable we replace R_ARM_RELATIVE with a rofixup. */
16564 htab->srofixup->size += 4 * eh->fdpic_cnts.funcdesc_cnt;
16565 }
16566 else
16567 {
16568 /* Will need one dynamic reloc per reference. will be either
16569 R_ARM_FUNCDESC or R_ARM_RELATIVE for hidden symbols. */
16570 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot,
16571 eh->fdpic_cnts.funcdesc_cnt);
16572 }
16573 }
16574
a4fd1a8e
PB		 16575 /* Allocate stubs for exported Thumb functions on v4t. */
16576 if (!htab->use_blx && h->dynindx != -1
0eaedd0e 16577 && h->def_regular
39d911fc 16578 && ARM_GET_SYM_BRANCH_TYPE (h->target_internal) == ST_BRANCH_TO_THUMB
a4fd1a8e
PB		 16579 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
16580 {
16581 struct elf_link_hash_entry * th;
16582 struct bfd_link_hash_entry * bh;
16583 struct elf_link_hash_entry * myh;
16584 char name[1024];
16585 asection *s;
16586 bh = NULL;
16587 /* Create a new symbol to regist the real location of the function. */
16588 s = h->root.u.def.section;
906e58ca 16589 sprintf (name, "__real_%s", h->root.root.string);
a4fd1a8e
PB		 16590 _bfd_generic_link_add_one_symbol (info, s->owner,
16591 name, BSF_GLOBAL, s,
16592 h->root.u.def.value,
16593 NULL, TRUE, FALSE, &bh);
16594
16595 myh = (struct elf_link_hash_entry *) bh;
35fc36a8 16596 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
a4fd1a8e 16597 myh->forced_local = 1;
39d911fc 16598 ARM_SET_SYM_BRANCH_TYPE (myh->target_internal, ST_BRANCH_TO_THUMB);
a4fd1a8e
PB		 16599 eh->export_glue = myh;
16600 th = record_arm_to_thumb_glue (info, h);
16601 /* Point the symbol at the stub. */
16602 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
39d911fc 16603 ARM_SET_SYM_BRANCH_TYPE (h->target_internal, ST_BRANCH_TO_ARM);
a4fd1a8e
PB		 16604 h->root.u.def.section = th->root.u.def.section;
16605 h->root.u.def.value = th->root.u.def.value & ~1;
16606 }
16607
0bdcacaf 16608 if (eh->dyn_relocs == NULL)
5e681ec4
PB		 16609 return TRUE;
16610
16611 /* In the shared -Bsymbolic case, discard space allocated for
16612 dynamic pc-relative relocs against symbols which turn out to be
16613 defined in regular objects. For the normal shared case, discard
16614 space for pc-relative relocs that have become local due to symbol
16615 visibility changes. */
16616
e8b09b87 16617 if (bfd_link_pic (info) || htab->root.is_relocatable_executable || htab->fdpic_p)
5e681ec4 16618 {
469a3493
RM		 16619 /* Relocs that use pc_count are PC-relative forms, which will appear
16620 on something like ".long foo - ." or "movw REG, foo - .". We want
16621 calls to protected symbols to resolve directly to the function
16622 rather than going via the plt. If people want function pointer
16623 comparisons to work as expected then they should avoid writing
16624 assembly like ".long foo - .". */
ba93b8ac
DJ		 16625 if (SYMBOL_CALLS_LOCAL (info, h))
16626 {
0bdcacaf 16627 struct elf_dyn_relocs **pp;
ba93b8ac 16628
0bdcacaf 16629 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
ba93b8ac
DJ		 16630 {
16631 p->count -= p->pc_count;
16632 p->pc_count = 0;
16633 if (p->count == 0)
16634 *pp = p->next;
16635 else
16636 pp = &p->next;
16637 }
16638 }
16639
4dfe6ac6 16640 if (htab->vxworks_p)
3348747a 16641 {
0bdcacaf 16642 struct elf_dyn_relocs **pp;
3348747a 16643
0bdcacaf 16644 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3348747a 16645 {
0bdcacaf 16646 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
3348747a
NS		 16647 *pp = p->next;
16648 else
16649 pp = &p->next;
16650 }
16651 }
16652
ba93b8ac 16653 /* Also discard relocs on undefined weak syms with non-default
99059e56 16654 visibility. */
0bdcacaf 16655 if (eh->dyn_relocs != NULL
5e681ec4 16656 && h->root.type == bfd_link_hash_undefweak)
22d606e9 16657 {
95b03e4a
L		 16658 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
16659 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
0bdcacaf 16660 eh->dyn_relocs = NULL;
22d606e9
AM		 16661
16662 /* Make sure undefined weak symbols are output as a dynamic
16663 symbol in PIEs. */
e8b09b87 16664 else if (htab->root.dynamic_sections_created && h->dynindx == -1
22d606e9
AM		 16665 && !h->forced_local)
16666 {
16667 if (! bfd_elf_link_record_dynamic_symbol (info, h))
16668 return FALSE;
16669 }
16670 }
16671
67687978
PB		 16672 else if (htab->root.is_relocatable_executable && h->dynindx == -1
16673 && h->root.type == bfd_link_hash_new)
16674 {
16675 /* Output absolute symbols so that we can create relocations
16676 against them. For normal symbols we output a relocation
16677 against the section that contains them. */
16678 if (! bfd_elf_link_record_dynamic_symbol (info, h))
16679 return FALSE;
16680 }
16681
5e681ec4
PB		 16682 }
16683 else
16684 {
16685 /* For the non-shared case, discard space for relocs against
16686 symbols which turn out to need copy relocs or are not
16687 dynamic. */
16688
f5385ebf
AM		 16689 if (!h->non_got_ref
16690 && ((h->def_dynamic
16691 && !h->def_regular)
5e681ec4
PB		 16692 || (htab->root.dynamic_sections_created
16693 && (h->root.type == bfd_link_hash_undefweak
16694 || h->root.type == bfd_link_hash_undefined))))
16695 {
16696 /* Make sure this symbol is output as a dynamic symbol.
16697 Undefined weak syms won't yet be marked as dynamic. */
6c699715
RL		 16698 if (h->dynindx == -1 && !h->forced_local
16699 && h->root.type == bfd_link_hash_undefweak)
5e681ec4 16700 {
c152c796 16701 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB		 16702 return FALSE;
16703 }
16704
16705 /* If that succeeded, we know we'll be keeping all the
16706 relocs. */
16707 if (h->dynindx != -1)
16708 goto keep;
16709 }
16710
0bdcacaf 16711 eh->dyn_relocs = NULL;
5e681ec4
PB		 16712
16713 keep: ;
16714 }
16715
16716 /* Finally, allocate space. */
0bdcacaf 16717 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5e681ec4 16718 {
0bdcacaf 16719 asection *sreloc = elf_section_data (p->sec)->sreloc;
e8b09b87 16720
34e77a92
RS		 16721 if (h->type == STT_GNU_IFUNC
16722 && eh->plt.noncall_refcount == 0
16723 && SYMBOL_REFERENCES_LOCAL (info, h))
16724 elf32_arm_allocate_irelocs (info, sreloc, p->count);
e8b09b87
CL		 16725 else if (h->dynindx != -1 && (!bfd_link_pic(info) || !info->symbolic || !h->def_regular))
16726 elf32_arm_allocate_dynrelocs (info, sreloc, p->count);
16727 else if (htab->fdpic_p && !bfd_link_pic(info))
16728 htab->srofixup->size += 4 * p->count;
34e77a92
RS		 16729 else
16730 elf32_arm_allocate_dynrelocs (info, sreloc, p->count);
5e681ec4
PB		 16731 }
16732
16733 return TRUE;
16734}
16735
63c1f59d
AM		 16736/* Set DF_TEXTREL if we find any dynamic relocs that apply to
16737 read-only sections. */
08d1f311
DJ		 16738
16739static bfd_boolean
63c1f59d 16740maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
08d1f311 16741{
63c1f59d 16742 asection *sec;
08d1f311 16743
63c1f59d
AM		 16744 if (h->root.type == bfd_link_hash_indirect)
16745 return TRUE;
08d1f311 16746
63c1f59d
AM		 16747 sec = readonly_dynrelocs (h);
16748 if (sec != NULL)
16749 {
16750 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
08d1f311 16751
63c1f59d
AM		 16752 info->flags |= DF_TEXTREL;
16753 info->callbacks->minfo
c1c8c1ef 16754 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
63c1f59d 16755 sec->owner, h->root.root.string, sec);
08d1f311 16756
63c1f59d
AM		 16757 /* Not an error, just cut short the traversal. */
16758 return FALSE;
08d1f311 16759 }
cb10292c 16760
08d1f311
DJ		 16761 return TRUE;
16762}
16763
d504ffc8
DJ		 16764void
16765bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
16766 int byteswap_code)
16767{
16768 struct elf32_arm_link_hash_table *globals;
16769
16770 globals = elf32_arm_hash_table (info);
4dfe6ac6
NC		 16771 if (globals == NULL)
16772 return;
16773
d504ffc8
DJ		 16774 globals->byteswap_code = byteswap_code;
16775}
16776
252b5132
RH		 16777/* Set the sizes of the dynamic sections. */
16778
b34976b6 16779static bfd_boolean
57e8b36a
NC		 16780elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
16781 struct bfd_link_info * info)
252b5132
RH		 16782{
16783 bfd * dynobj;
16784 asection * s;
b34976b6
AM		 16785 bfd_boolean plt;
16786 bfd_boolean relocs;
5e681ec4
PB		 16787 bfd *ibfd;
16788 struct elf32_arm_link_hash_table *htab;
252b5132 16789
5e681ec4 16790 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 16791 if (htab == NULL)
16792 return FALSE;
16793
252b5132
RH		 16794 dynobj = elf_hash_table (info)->dynobj;
16795 BFD_ASSERT (dynobj != NULL);
39b41c9c 16796 check_use_blx (htab);
252b5132
RH		 16797
16798 if (elf_hash_table (info)->dynamic_sections_created)
16799 {
16800 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 16801 if (bfd_link_executable (info) && !info->nointerp)
252b5132 16802 {
3d4d4302 16803 s = bfd_get_linker_section (dynobj, ".interp");
252b5132 16804 BFD_ASSERT (s != NULL);
eea6121a 16805 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 16806 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
16807 }
16808 }
5e681ec4
PB		 16809
16810 /* Set up .got offsets for local syms, and space for local dynamic
16811 relocs. */
c72f2fb2 16812 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
252b5132 16813 {
5e681ec4
PB		 16814 bfd_signed_vma *local_got;
16815 bfd_signed_vma *end_local_got;
34e77a92 16816 struct arm_local_iplt_info **local_iplt_ptr, *local_iplt;
5e681ec4 16817 char *local_tls_type;
0855e32b 16818 bfd_vma *local_tlsdesc_gotent;
5e681ec4
PB		 16819 bfd_size_type locsymcount;
16820 Elf_Internal_Shdr *symtab_hdr;
16821 asection *srel;
4dfe6ac6 16822 bfd_boolean is_vxworks = htab->vxworks_p;
34e77a92 16823 unsigned int symndx;
e8b09b87 16824 struct fdpic_local *local_fdpic_cnts;
5e681ec4 16825
0ffa91dd 16826 if (! is_arm_elf (ibfd))
5e681ec4
PB		 16827 continue;
16828
16829 for (s = ibfd->sections; s != NULL; s = s->next)
16830 {
0bdcacaf 16831 struct elf_dyn_relocs *p;
5e681ec4 16832
0bdcacaf 16833 for (p = (struct elf_dyn_relocs *)
99059e56 16834 elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
5e681ec4 16835 {
0bdcacaf
RS		 16836 if (!bfd_is_abs_section (p->sec)
16837 && bfd_is_abs_section (p->sec->output_section))
5e681ec4
PB		 16838 {
16839 /* Input section has been discarded, either because
16840 it is a copy of a linkonce section or due to
16841 linker script /DISCARD/, so we'll be discarding
16842 the relocs too. */
16843 }
3348747a 16844 else if (is_vxworks
0bdcacaf 16845 && strcmp (p->sec->output_section->name,
3348747a
NS		 16846 ".tls_vars") == 0)
16847 {
16848 /* Relocations in vxworks .tls_vars sections are
16849 handled specially by the loader. */
16850 }
5e681ec4
PB		 16851 else if (p->count != 0)
16852 {
0bdcacaf 16853 srel = elf_section_data (p->sec)->sreloc;
e8b09b87
CL		 16854 if (htab->fdpic_p && !bfd_link_pic(info))
16855 htab->srofixup->size += 4 * p->count;
16856 else
16857 elf32_arm_allocate_dynrelocs (info, srel, p->count);
0bdcacaf 16858 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5e681ec4
PB		 16859 info->flags |= DF_TEXTREL;
16860 }
16861 }
16862 }
16863
16864 local_got = elf_local_got_refcounts (ibfd);
16865 if (!local_got)
16866 continue;
16867
0ffa91dd 16868 symtab_hdr = & elf_symtab_hdr (ibfd);
5e681ec4
PB		 16869 locsymcount = symtab_hdr->sh_info;
16870 end_local_got = local_got + locsymcount;
34e77a92 16871 local_iplt_ptr = elf32_arm_local_iplt (ibfd);
ba93b8ac 16872 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
0855e32b 16873 local_tlsdesc_gotent = elf32_arm_local_tlsdesc_gotent (ibfd);
e8b09b87 16874 local_fdpic_cnts = elf32_arm_local_fdpic_cnts (ibfd);
34e77a92 16875 symndx = 0;
362d30a1
RS		 16876 s = htab->root.sgot;
16877 srel = htab->root.srelgot;
0855e32b 16878 for (; local_got < end_local_got;
34e77a92 16879 ++local_got, ++local_iplt_ptr, ++local_tls_type,
e8b09b87 16880 ++local_tlsdesc_gotent, ++symndx, ++local_fdpic_cnts)
5e681ec4 16881 {
0855e32b 16882 *local_tlsdesc_gotent = (bfd_vma) -1;
34e77a92 16883 local_iplt = *local_iplt_ptr;
e8b09b87
CL		 16884
16885 /* FDPIC support. */
16886 if (local_fdpic_cnts->gotofffuncdesc_cnt > 0)
16887 {
16888 if (local_fdpic_cnts->funcdesc_offset == -1)
16889 {
16890 local_fdpic_cnts->funcdesc_offset = s->size;
16891 s->size += 8;
16892
16893 /* We will add an R_ARM_FUNCDESC_VALUE relocation or two rofixups. */
16894 if (bfd_link_pic(info))
16895 elf32_arm_allocate_dynrelocs (info, srel, 1);
16896 else
16897 htab->srofixup->size += 8;
16898 }
16899 }
16900
16901 if (local_fdpic_cnts->funcdesc_cnt > 0)
16902 {
16903 if (local_fdpic_cnts->funcdesc_offset == -1)
16904 {
16905 local_fdpic_cnts->funcdesc_offset = s->size;
16906 s->size += 8;
16907
16908 /* We will add an R_ARM_FUNCDESC_VALUE relocation or two rofixups. */
16909 if (bfd_link_pic(info))
16910 elf32_arm_allocate_dynrelocs (info, srel, 1);
16911 else
16912 htab->srofixup->size += 8;
16913 }
16914
16915 /* We will add n R_ARM_RELATIVE relocations or n rofixups. */
16916 if (bfd_link_pic(info))
16917 elf32_arm_allocate_dynrelocs (info, srel, local_fdpic_cnts->funcdesc_cnt);
16918 else
16919 htab->srofixup->size += 4 * local_fdpic_cnts->funcdesc_cnt;
16920 }
16921
34e77a92
RS		 16922 if (local_iplt != NULL)
16923 {
16924 struct elf_dyn_relocs *p;
16925
16926 if (local_iplt->root.refcount > 0)
16927 {
16928 elf32_arm_allocate_plt_entry (info, TRUE,
16929 &local_iplt->root,
16930 &local_iplt->arm);
16931 if (local_iplt->arm.noncall_refcount == 0)
16932 /* All references to the PLT are calls, so all
16933 non-call references can resolve directly to the
16934 run-time target. This means that the .got entry
16935 would be the same as the .igot.plt entry, so there's
16936 no point creating both. */
16937 *local_got = 0;
16938 }
16939 else
16940 {
16941 BFD_ASSERT (local_iplt->arm.noncall_refcount == 0);
16942 local_iplt->root.offset = (bfd_vma) -1;
16943 }
16944
16945 for (p = local_iplt->dyn_relocs; p != NULL; p = p->next)
16946 {
16947 asection *psrel;
16948
16949 psrel = elf_section_data (p->sec)->sreloc;
16950 if (local_iplt->arm.noncall_refcount == 0)
16951 elf32_arm_allocate_irelocs (info, psrel, p->count);
16952 else
16953 elf32_arm_allocate_dynrelocs (info, psrel, p->count);
16954 }
16955 }
5e681ec4
PB		 16956 if (*local_got > 0)
16957 {
34e77a92
RS		 16958 Elf_Internal_Sym *isym;
16959
eea6121a 16960 *local_got = s->size;
ba93b8ac
DJ		 16961 if (*local_tls_type & GOT_TLS_GD)
16962 /* TLS_GD relocs need an 8-byte structure in the GOT. */
16963 s->size += 8;
0855e32b
NS		 16964 if (*local_tls_type & GOT_TLS_GDESC)
16965 {
16966 *local_tlsdesc_gotent = htab->root.sgotplt->size
16967 - elf32_arm_compute_jump_table_size (htab);
16968 htab->root.sgotplt->size += 8;
16969 *local_got = (bfd_vma) -2;
34e77a92 16970 /* plt.got_offset needs to know there's a TLS_DESC
0855e32b 16971 reloc in the middle of .got.plt. */
99059e56 16972 htab->num_tls_desc++;
0855e32b 16973 }
ba93b8ac
DJ		 16974 if (*local_tls_type & GOT_TLS_IE)
16975 s->size += 4;
ba93b8ac 16976
0855e32b
NS		 16977 if (*local_tls_type & GOT_NORMAL)
16978 {
16979 /* If the symbol is both GD and GDESC, *local_got
16980 may have been overwritten. */
16981 *local_got = s->size;
16982 s->size += 4;
16983 }
16984
34e77a92
RS		 16985 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, symndx);
16986 if (isym == NULL)
16987 return FALSE;
16988
16989 /* If all references to an STT_GNU_IFUNC PLT are calls,
16990 then all non-call references, including this GOT entry,
16991 resolve directly to the run-time target. */
16992 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
16993 && (local_iplt == NULL
16994 || local_iplt->arm.noncall_refcount == 0))
16995 elf32_arm_allocate_irelocs (info, srel, 1);
e8b09b87 16996 else if (bfd_link_pic (info) || output_bfd->flags & DYNAMIC || htab->fdpic_p)
0855e32b 16997 {
e8b09b87 16998 if ((bfd_link_pic (info) && !(*local_tls_type & GOT_TLS_GDESC)))
3064e1ff 16999 elf32_arm_allocate_dynrelocs (info, srel, 1);
e8b09b87
CL		 17000 else if (htab->fdpic_p && *local_tls_type & GOT_NORMAL)
17001 htab->srofixup->size += 4;
99059e56 17002
e8b09b87
CL		 17003 if ((bfd_link_pic (info) || htab->fdpic_p)
17004 && *local_tls_type & GOT_TLS_GDESC)
3064e1ff
JB		 17005 {
17006 elf32_arm_allocate_dynrelocs (info,
17007 htab->root.srelplt, 1);
17008 htab->tls_trampoline = -1;
17009 }
0855e32b 17010 }
5e681ec4
PB		 17011 }
17012 else
17013 *local_got = (bfd_vma) -1;
17014 }
252b5132
RH		 17015 }
17016
ba93b8ac
DJ		 17017 if (htab->tls_ldm_got.refcount > 0)
17018 {
17019 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5c5a4843 17020 for R_ARM_TLS_LDM32/R_ARM_TLS_LDM32_FDPIC relocations. */
362d30a1
RS		 17021 htab->tls_ldm_got.offset = htab->root.sgot->size;
17022 htab->root.sgot->size += 8;
0e1862bb 17023 if (bfd_link_pic (info))
47beaa6a 17024 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
ba93b8ac
DJ		 17025 }
17026 else
17027 htab->tls_ldm_got.offset = -1;
17028
e8b09b87
CL		 17029 /* At the very end of the .rofixup section is a pointer to the GOT,
17030 reserve space for it. */
17031 if (htab->fdpic_p && htab->srofixup != NULL)
17032 htab->srofixup->size += 4;
17033
5e681ec4
PB		 17034 /* Allocate global sym .plt and .got entries, and space for global
17035 sym dynamic relocs. */
47beaa6a 17036 elf_link_hash_traverse (& htab->root, allocate_dynrelocs_for_symbol, info);
252b5132 17037
d504ffc8 17038 /* Here we rummage through the found bfds to collect glue information. */
c72f2fb2 17039 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
c7b8f16e 17040 {
0ffa91dd 17041 if (! is_arm_elf (ibfd))
e44a2c9c
AM		 17042 continue;
17043
c7b8f16e
JB		 17044 /* Initialise mapping tables for code/data. */
17045 bfd_elf32_arm_init_maps (ibfd);
906e58ca 17046
c7b8f16e 17047 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
a504d23a
LA		 17048 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info)
17049 || !bfd_elf32_arm_stm32l4xx_erratum_scan (ibfd, info))
90b6238f 17050 _bfd_error_handler (_("errors encountered processing file %pB"), ibfd);
c7b8f16e 17051 }
d504ffc8 17052
3e6b1042
DJ		 17053 /* Allocate space for the glue sections now that we've sized them. */
17054 bfd_elf32_arm_allocate_interworking_sections (info);
17055
0855e32b
NS		 17056 /* For every jump slot reserved in the sgotplt, reloc_count is
17057 incremented. However, when we reserve space for TLS descriptors,
17058 it's not incremented, so in order to compute the space reserved
17059 for them, it suffices to multiply the reloc count by the jump
17060 slot size. */
17061 if (htab->root.srelplt)
17062 htab->sgotplt_jump_table_size = elf32_arm_compute_jump_table_size(htab);
17063
17064 if (htab->tls_trampoline)
17065 {
17066 if (htab->root.splt->size == 0)
17067 htab->root.splt->size += htab->plt_header_size;
b38cadfb 17068
0855e32b
NS		 17069 htab->tls_trampoline = htab->root.splt->size;
17070 htab->root.splt->size += htab->plt_entry_size;
b38cadfb 17071
0855e32b 17072 /* If we're not using lazy TLS relocations, don't generate the
99059e56 17073 PLT and GOT entries they require. */
0855e32b
NS		 17074 if (!(info->flags & DF_BIND_NOW))
17075 {
17076 htab->dt_tlsdesc_got = htab->root.sgot->size;
17077 htab->root.sgot->size += 4;
17078
17079 htab->dt_tlsdesc_plt = htab->root.splt->size;
17080 htab->root.splt->size += 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline);
17081 }
17082 }
17083
252b5132
RH		 17084 /* The check_relocs and adjust_dynamic_symbol entry points have
17085 determined the sizes of the various dynamic sections. Allocate
17086 memory for them. */
b34976b6
AM		 17087 plt = FALSE;
17088 relocs = FALSE;
252b5132
RH		 17089 for (s = dynobj->sections; s != NULL; s = s->next)
17090 {
17091 const char * name;
252b5132
RH		 17092
17093 if ((s->flags & SEC_LINKER_CREATED) == 0)
17094 continue;
17095
17096 /* It's OK to base decisions on the section name, because none
17097 of the dynobj section names depend upon the input files. */
fd361982 17098 name = bfd_section_name (s);
252b5132 17099
34e77a92 17100 if (s == htab->root.splt)
252b5132 17101 {
c456f082
AM		 17102 /* Remember whether there is a PLT. */
17103 plt = s->size != 0;
252b5132 17104 }
0112cd26 17105 else if (CONST_STRNEQ (name, ".rel"))
252b5132 17106 {
c456f082 17107 if (s->size != 0)
252b5132 17108 {
252b5132 17109 /* Remember whether there are any reloc sections other
00a97672 17110 than .rel(a).plt and .rela.plt.unloaded. */
362d30a1 17111 if (s != htab->root.srelplt && s != htab->srelplt2)
b34976b6 17112 relocs = TRUE;
252b5132
RH		 17113
17114 /* We use the reloc_count field as a counter if we need
17115 to copy relocs into the output file. */
17116 s->reloc_count = 0;
17117 }
17118 }
34e77a92
RS		 17119 else if (s != htab->root.sgot
17120 && s != htab->root.sgotplt
17121 && s != htab->root.iplt
17122 && s != htab->root.igotplt
5474d94f 17123 && s != htab->root.sdynbss
e8b09b87
CL		 17124 && s != htab->root.sdynrelro
17125 && s != htab->srofixup)
252b5132
RH		 17126 {
17127 /* It's not one of our sections, so don't allocate space. */
17128 continue;
17129 }
17130
c456f082 17131 if (s->size == 0)
252b5132 17132 {
c456f082 17133 /* If we don't need this section, strip it from the
00a97672
RS		 17134 output file. This is mostly to handle .rel(a).bss and
17135 .rel(a).plt. We must create both sections in
c456f082
AM		 17136 create_dynamic_sections, because they must be created
17137 before the linker maps input sections to output
17138 sections. The linker does that before
17139 adjust_dynamic_symbol is called, and it is that
17140 function which decides whether anything needs to go
17141 into these sections. */
8423293d 17142 s->flags |= SEC_EXCLUDE;
252b5132
RH		 17143 continue;
17144 }
17145
c456f082
AM		 17146 if ((s->flags & SEC_HAS_CONTENTS) == 0)
17147 continue;
17148
252b5132 17149 /* Allocate memory for the section contents. */
21d799b5 17150 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
c456f082 17151 if (s->contents == NULL)
b34976b6 17152 return FALSE;
252b5132
RH		 17153 }
17154
17155 if (elf_hash_table (info)->dynamic_sections_created)
17156 {
17157 /* Add some entries to the .dynamic section. We fill in the
17158 values later, in elf32_arm_finish_dynamic_sections, but we
17159 must add the entries now so that we get the correct size for
17160 the .dynamic section. The DT_DEBUG entry is filled in by the
17161 dynamic linker and used by the debugger. */
dc810e39 17162#define add_dynamic_entry(TAG, VAL) \
5a580b3a 17163 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 17164
0e1862bb 17165 if (bfd_link_executable (info))
252b5132 17166 {
dc810e39 17167 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 17168 return FALSE;
252b5132
RH		 17169 }
17170
17171 if (plt)
17172 {
dc810e39
AM		 17173 if ( !add_dynamic_entry (DT_PLTGOT, 0)
17174 || !add_dynamic_entry (DT_PLTRELSZ, 0)
00a97672
RS		 17175 || !add_dynamic_entry (DT_PLTREL,
17176 htab->use_rel ? DT_REL : DT_RELA)
dc810e39 17177 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 17178 return FALSE;
0855e32b 17179
5025eb7c
AO		 17180 if (htab->dt_tlsdesc_plt
17181 && (!add_dynamic_entry (DT_TLSDESC_PLT,0)
17182 || !add_dynamic_entry (DT_TLSDESC_GOT,0)))
b38cadfb 17183 return FALSE;
252b5132
RH		 17184 }
17185
17186 if (relocs)
17187 {
00a97672
RS		 17188 if (htab->use_rel)
17189 {
17190 if (!add_dynamic_entry (DT_REL, 0)
17191 || !add_dynamic_entry (DT_RELSZ, 0)
17192 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
17193 return FALSE;
17194 }
17195 else
17196 {
17197 if (!add_dynamic_entry (DT_RELA, 0)
17198 || !add_dynamic_entry (DT_RELASZ, 0)
17199 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
17200 return FALSE;
17201 }
252b5132
RH		 17202 }
17203
08d1f311
DJ		 17204 /* If any dynamic relocs apply to a read-only section,
17205 then we need a DT_TEXTREL entry. */
17206 if ((info->flags & DF_TEXTREL) == 0)
63c1f59d 17207 elf_link_hash_traverse (&htab->root, maybe_set_textrel, info);
08d1f311 17208
99e4ae17 17209 if ((info->flags & DF_TEXTREL) != 0)
252b5132 17210 {
dc810e39 17211 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 17212 return FALSE;
252b5132 17213 }
7a2b07ff
NS		 17214 if (htab->vxworks_p
17215 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
17216 return FALSE;
252b5132 17217 }
8532796c 17218#undef add_dynamic_entry
252b5132 17219
b34976b6 17220 return TRUE;
252b5132
RH		 17221}
17222
0855e32b
NS		 17223/* Size sections even though they're not dynamic. We use it to setup
17224 _TLS_MODULE_BASE_, if needed. */
17225
17226static bfd_boolean
17227elf32_arm_always_size_sections (bfd *output_bfd,
99059e56 17228 struct bfd_link_info *info)
0855e32b
NS		 17229{
17230 asection *tls_sec;
cb10292c
CL		 17231 struct elf32_arm_link_hash_table *htab;
17232
17233 htab = elf32_arm_hash_table (info);
0855e32b 17234
0e1862bb 17235 if (bfd_link_relocatable (info))
0855e32b
NS		 17236 return TRUE;
17237
17238 tls_sec = elf_hash_table (info)->tls_sec;
17239
17240 if (tls_sec)
17241 {
17242 struct elf_link_hash_entry *tlsbase;
17243
17244 tlsbase = elf_link_hash_lookup
17245 (elf_hash_table (info), "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
17246
17247 if (tlsbase)
99059e56
RM		 17248 {
17249 struct bfd_link_hash_entry *bh = NULL;
0855e32b 17250 const struct elf_backend_data *bed
99059e56 17251 = get_elf_backend_data (output_bfd);
0855e32b 17252
99059e56 17253 if (!(_bfd_generic_link_add_one_symbol
0855e32b
NS		 17254 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
17255 tls_sec, 0, NULL, FALSE,
17256 bed->collect, &bh)))
17257 return FALSE;
b38cadfb 17258
99059e56
RM		 17259 tlsbase->type = STT_TLS;
17260 tlsbase = (struct elf_link_hash_entry *)bh;
17261 tlsbase->def_regular = 1;
17262 tlsbase->other = STV_HIDDEN;
17263 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
0855e32b
NS		 17264 }
17265 }
cb10292c
CL		 17266
17267 if (htab->fdpic_p && !bfd_link_relocatable (info)
17268 && !bfd_elf_stack_segment_size (output_bfd, info,
17269 "__stacksize", DEFAULT_STACK_SIZE))
17270 return FALSE;
17271
0855e32b
NS		 17272 return TRUE;
17273}
17274
252b5132
RH		 17275/* Finish up dynamic symbol handling. We set the contents of various
17276 dynamic sections here. */
17277
b34976b6 17278static bfd_boolean
906e58ca
NC		 17279elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
17280 struct bfd_link_info * info,
17281 struct elf_link_hash_entry * h,
17282 Elf_Internal_Sym * sym)
252b5132 17283{
e5a52504 17284 struct elf32_arm_link_hash_table *htab;
b7693d02 17285 struct elf32_arm_link_hash_entry *eh;
252b5132 17286
e5a52504 17287 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 17288 if (htab == NULL)
17289 return FALSE;
17290
b7693d02 17291 eh = (struct elf32_arm_link_hash_entry *) h;
252b5132
RH		 17292
17293 if (h->plt.offset != (bfd_vma) -1)
17294 {
34e77a92 17295 if (!eh->is_iplt)
e5a52504 17296 {
34e77a92 17297 BFD_ASSERT (h->dynindx != -1);
57460bcf
NC		 17298 if (! elf32_arm_populate_plt_entry (output_bfd, info, &h->plt, &eh->plt,
17299 h->dynindx, 0))
17300 return FALSE;
e5a52504 17301 }
57e8b36a 17302
f5385ebf 17303 if (!h->def_regular)
252b5132
RH		 17304 {
17305 /* Mark the symbol as undefined, rather than as defined in
3a635617 17306 the .plt section. */
252b5132 17307 sym->st_shndx = SHN_UNDEF;
3a635617 17308 /* If the symbol is weak we need to clear the value.
d982ba73
PB		 17309 Otherwise, the PLT entry would provide a definition for
17310 the symbol even if the symbol wasn't defined anywhere,
3a635617
WN		 17311 and so the symbol would never be NULL. Leave the value if
17312 there were any relocations where pointer equality matters
17313 (this is a clue for the dynamic linker, to make function
17314 pointer comparisons work between an application and shared
17315 library). */
97323ad1 17316 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
d982ba73 17317 sym->st_value = 0;
252b5132 17318 }
34e77a92
RS		 17319 else if (eh->is_iplt && eh->plt.noncall_refcount != 0)
17320 {
17321 /* At least one non-call relocation references this .iplt entry,
17322 so the .iplt entry is the function's canonical address. */
17323 sym->st_info = ELF_ST_INFO (ELF_ST_BIND (sym->st_info), STT_FUNC);
39d911fc 17324 ARM_SET_SYM_BRANCH_TYPE (sym->st_target_internal, ST_BRANCH_TO_ARM);
34e77a92
RS		 17325 sym->st_shndx = (_bfd_elf_section_from_bfd_section
17326 (output_bfd, htab->root.iplt->output_section));
17327 sym->st_value = (h->plt.offset
17328 + htab->root.iplt->output_section->vma
17329 + htab->root.iplt->output_offset);
17330 }
252b5132
RH		 17331 }
17332
f5385ebf 17333 if (h->needs_copy)
252b5132
RH		 17334 {
17335 asection * s;
947216bf 17336 Elf_Internal_Rela rel;
252b5132
RH		 17337
17338 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH		 17339 BFD_ASSERT (h->dynindx != -1
17340 && (h->root.type == bfd_link_hash_defined
17341 || h->root.type == bfd_link_hash_defweak));
17342
00a97672 17343 rel.r_addend = 0;
252b5132
RH		 17344 rel.r_offset = (h->root.u.def.value
17345 + h->root.u.def.section->output_section->vma
17346 + h->root.u.def.section->output_offset);
17347 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
afbf7e8e 17348 if (h->root.u.def.section == htab->root.sdynrelro)
5474d94f
AM		 17349 s = htab->root.sreldynrelro;
17350 else
17351 s = htab->root.srelbss;
47beaa6a 17352 elf32_arm_add_dynreloc (output_bfd, info, s, &rel);
252b5132
RH		 17353 }
17354
00a97672 17355 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
fac7bd64
CL		 17356 and for FDPIC, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute:
17357 it is relative to the ".got" section. */
9637f6ef 17358 if (h == htab->root.hdynamic
fac7bd64 17359 || (!htab->fdpic_p && !htab->vxworks_p && h == htab->root.hgot))
252b5132
RH		 17360 sym->st_shndx = SHN_ABS;
17361
b34976b6 17362 return TRUE;
252b5132
RH		 17363}
17364
0855e32b
NS		 17365static void
17366arm_put_trampoline (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
17367 void *contents,
17368 const unsigned long *template, unsigned count)
17369{
17370 unsigned ix;
b38cadfb 17371
0855e32b
NS		 17372 for (ix = 0; ix != count; ix++)
17373 {
17374 unsigned long insn = template[ix];
17375
17376 /* Emit mov pc,rx if bx is not permitted. */
17377 if (htab->fix_v4bx == 1 && (insn & 0x0ffffff0) == 0x012fff10)
17378 insn = (insn & 0xf000000f) | 0x01a0f000;
17379 put_arm_insn (htab, output_bfd, insn, (char *)contents + ix*4);
17380 }
17381}
17382
99059e56
RM		 17383/* Install the special first PLT entry for elf32-arm-nacl. Unlike
17384 other variants, NaCl needs this entry in a static executable's
17385 .iplt too. When we're handling that case, GOT_DISPLACEMENT is
17386 zero. For .iplt really only the last bundle is useful, and .iplt
17387 could have a shorter first entry, with each individual PLT entry's
17388 relative branch calculated differently so it targets the last
17389 bundle instead of the instruction before it (labelled .Lplt_tail
17390 above). But it's simpler to keep the size and layout of PLT0
17391 consistent with the dynamic case, at the cost of some dead code at
17392 the start of .iplt and the one dead store to the stack at the start
17393 of .Lplt_tail. */
17394static void
17395arm_nacl_put_plt0 (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
17396 asection *plt, bfd_vma got_displacement)
17397{
17398 unsigned int i;
17399
17400 put_arm_insn (htab, output_bfd,
17401 elf32_arm_nacl_plt0_entry[0]
17402 | arm_movw_immediate (got_displacement),
17403 plt->contents + 0);
17404 put_arm_insn (htab, output_bfd,
17405 elf32_arm_nacl_plt0_entry[1]
17406 | arm_movt_immediate (got_displacement),
17407 plt->contents + 4);
17408
17409 for (i = 2; i < ARRAY_SIZE (elf32_arm_nacl_plt0_entry); ++i)
17410 put_arm_insn (htab, output_bfd,
17411 elf32_arm_nacl_plt0_entry[i],
17412 plt->contents + (i * 4));
17413}
17414
252b5132
RH		 17415/* Finish up the dynamic sections. */
17416
b34976b6 17417static bfd_boolean
57e8b36a 17418elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
252b5132
RH		 17419{
17420 bfd * dynobj;
17421 asection * sgot;
17422 asection * sdyn;
4dfe6ac6
NC		 17423 struct elf32_arm_link_hash_table *htab;
17424
17425 htab = elf32_arm_hash_table (info);
17426 if (htab == NULL)
17427 return FALSE;
252b5132
RH		 17428
17429 dynobj = elf_hash_table (info)->dynobj;
17430
362d30a1 17431 sgot = htab->root.sgotplt;
894891db
NC		 17432 /* A broken linker script might have discarded the dynamic sections.
17433 Catch this here so that we do not seg-fault later on. */
17434 if (sgot != NULL && bfd_is_abs_section (sgot->output_section))
17435 return FALSE;
3d4d4302 17436 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
252b5132
RH		 17437
17438 if (elf_hash_table (info)->dynamic_sections_created)
17439 {
17440 asection *splt;
17441 Elf32_External_Dyn *dyncon, *dynconend;
17442
362d30a1 17443 splt = htab->root.splt;
24a1ba0f 17444 BFD_ASSERT (splt != NULL && sdyn != NULL);
cbc704f3 17445 BFD_ASSERT (htab->symbian_p || sgot != NULL);
252b5132
RH		 17446
17447 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 17448 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9b485d32 17449
252b5132
RH		 17450 for (; dyncon < dynconend; dyncon++)
17451 {
17452 Elf_Internal_Dyn dyn;
17453 const char * name;
17454 asection * s;
17455
17456 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
17457
17458 switch (dyn.d_tag)
17459 {
229fcec5
MM		 17460 unsigned int type;
17461
252b5132 17462 default:
7a2b07ff
NS		 17463 if (htab->vxworks_p
17464 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
17465 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 17466 break;
17467
229fcec5
MM		 17468 case DT_HASH:
17469 name = ".hash";
17470 goto get_vma_if_bpabi;
17471 case DT_STRTAB:
17472 name = ".dynstr";
17473 goto get_vma_if_bpabi;
17474 case DT_SYMTAB:
17475 name = ".dynsym";
17476 goto get_vma_if_bpabi;
c0042f5d
MM		 17477 case DT_VERSYM:
17478 name = ".gnu.version";
17479 goto get_vma_if_bpabi;
17480 case DT_VERDEF:
17481 name = ".gnu.version_d";
17482 goto get_vma_if_bpabi;
17483 case DT_VERNEED:
17484 name = ".gnu.version_r";
17485 goto get_vma_if_bpabi;
17486
252b5132 17487 case DT_PLTGOT:
4ade44b7 17488 name = htab->symbian_p ? ".got" : ".got.plt";
252b5132
RH		 17489 goto get_vma;
17490 case DT_JMPREL:
00a97672 17491 name = RELOC_SECTION (htab, ".plt");
252b5132 17492 get_vma:
4ade44b7 17493 s = bfd_get_linker_section (dynobj, name);
05456594
NC		 17494 if (s == NULL)
17495 {
4eca0228 17496 _bfd_error_handler
4ade44b7 17497 (_("could not find section %s"), name);
05456594
NC		 17498 bfd_set_error (bfd_error_invalid_operation);
17499 return FALSE;
17500 }
229fcec5 17501 if (!htab->symbian_p)
4ade44b7 17502 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
229fcec5
MM		 17503 else
17504 /* In the BPABI, tags in the PT_DYNAMIC section point
17505 at the file offset, not the memory address, for the
17506 convenience of the post linker. */
4ade44b7 17507 dyn.d_un.d_ptr = s->output_section->filepos + s->output_offset;
252b5132
RH		 17508 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
17509 break;
17510
229fcec5
MM		 17511 get_vma_if_bpabi:
17512 if (htab->symbian_p)
17513 goto get_vma;
17514 break;
17515
252b5132 17516 case DT_PLTRELSZ:
362d30a1 17517 s = htab->root.srelplt;
252b5132 17518 BFD_ASSERT (s != NULL);
eea6121a 17519 dyn.d_un.d_val = s->size;
252b5132
RH		 17520 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
17521 break;
906e58ca 17522
252b5132 17523 case DT_RELSZ:
00a97672 17524 case DT_RELASZ:
229fcec5
MM		 17525 case DT_REL:
17526 case DT_RELA:
229fcec5
MM		 17527 /* In the BPABI, the DT_REL tag must point at the file
17528 offset, not the VMA, of the first relocation
17529 section. So, we use code similar to that in
17530 elflink.c, but do not check for SHF_ALLOC on the
64f52338
AM		 17531 relocation section, since relocation sections are
17532 never allocated under the BPABI. PLT relocs are also
17533 included. */
229fcec5
MM		 17534 if (htab->symbian_p)
17535 {
17536 unsigned int i;
17537 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
17538 ? SHT_REL : SHT_RELA);
17539 dyn.d_un.d_val = 0;
17540 for (i = 1; i < elf_numsections (output_bfd); i++)
17541 {
906e58ca 17542 Elf_Internal_Shdr *hdr
229fcec5
MM		 17543 = elf_elfsections (output_bfd)[i];
17544 if (hdr->sh_type == type)
17545 {
906e58ca 17546 if (dyn.d_tag == DT_RELSZ
229fcec5
MM		 17547 || dyn.d_tag == DT_RELASZ)
17548 dyn.d_un.d_val += hdr->sh_size;
de52dba4
AM		 17549 else if ((ufile_ptr) hdr->sh_offset
17550 <= dyn.d_un.d_val - 1)
229fcec5
MM		 17551 dyn.d_un.d_val = hdr->sh_offset;
17552 }
17553 }
17554 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
17555 }
252b5132 17556 break;
88f7bcd5 17557
0855e32b 17558 case DT_TLSDESC_PLT:
99059e56 17559 s = htab->root.splt;
0855e32b
NS		 17560 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
17561 + htab->dt_tlsdesc_plt);
17562 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
17563 break;
17564
17565 case DT_TLSDESC_GOT:
99059e56 17566 s = htab->root.sgot;
0855e32b 17567 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
99059e56 17568 + htab->dt_tlsdesc_got);
0855e32b
NS		 17569 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
17570 break;
17571
88f7bcd5
NC		 17572 /* Set the bottom bit of DT_INIT/FINI if the
17573 corresponding function is Thumb. */
17574 case DT_INIT:
17575 name = info->init_function;
17576 goto get_sym;
17577 case DT_FINI:
17578 name = info->fini_function;
17579 get_sym:
17580 /* If it wasn't set by elf_bfd_final_link
4cc11e76 17581 then there is nothing to adjust. */
88f7bcd5
NC		 17582 if (dyn.d_un.d_val != 0)
17583 {
17584 struct elf_link_hash_entry * eh;
17585
17586 eh = elf_link_hash_lookup (elf_hash_table (info), name,
b34976b6 17587 FALSE, FALSE, TRUE);
39d911fc
TP		 17588 if (eh != NULL
17589 && ARM_GET_SYM_BRANCH_TYPE (eh->target_internal)
17590 == ST_BRANCH_TO_THUMB)
88f7bcd5
NC		 17591 {
17592 dyn.d_un.d_val |= 1;
b34976b6 17593 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
88f7bcd5
NC		 17594 }
17595 }
17596 break;
252b5132
RH		 17597 }
17598 }
17599
24a1ba0f 17600 /* Fill in the first entry in the procedure linkage table. */
4dfe6ac6 17601 if (splt->size > 0 && htab->plt_header_size)
f7a74f8c 17602 {
00a97672
RS		 17603 const bfd_vma *plt0_entry;
17604 bfd_vma got_address, plt_address, got_displacement;
17605
17606 /* Calculate the addresses of the GOT and PLT. */
17607 got_address = sgot->output_section->vma + sgot->output_offset;
17608 plt_address = splt->output_section->vma + splt->output_offset;
17609
17610 if (htab->vxworks_p)
17611 {
17612 /* The VxWorks GOT is relocated by the dynamic linker.
17613 Therefore, we must emit relocations rather than simply
17614 computing the values now. */
17615 Elf_Internal_Rela rel;
17616
17617 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
52ab56c2
PB		 17618 put_arm_insn (htab, output_bfd, plt0_entry[0],
17619 splt->contents + 0);
17620 put_arm_insn (htab, output_bfd, plt0_entry[1],
17621 splt->contents + 4);
17622 put_arm_insn (htab, output_bfd, plt0_entry[2],
17623 splt->contents + 8);
00a97672
RS		 17624 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
17625
8029a119 17626 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
00a97672
RS		 17627 rel.r_offset = plt_address + 12;
17628 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
17629 rel.r_addend = 0;
17630 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
17631 htab->srelplt2->contents);
17632 }
b38cadfb 17633 else if (htab->nacl_p)
99059e56
RM		 17634 arm_nacl_put_plt0 (htab, output_bfd, splt,
17635 got_address + 8 - (plt_address + 16));
eed94f8f
NC		 17636 else if (using_thumb_only (htab))
17637 {
17638 got_displacement = got_address - (plt_address + 12);
17639
17640 plt0_entry = elf32_thumb2_plt0_entry;
17641 put_arm_insn (htab, output_bfd, plt0_entry[0],
17642 splt->contents + 0);
17643 put_arm_insn (htab, output_bfd, plt0_entry[1],
17644 splt->contents + 4);
17645 put_arm_insn (htab, output_bfd, plt0_entry[2],
17646 splt->contents + 8);
17647
17648 bfd_put_32 (output_bfd, got_displacement, splt->contents + 12);
17649 }
00a97672
RS		 17650 else
17651 {
17652 got_displacement = got_address - (plt_address + 16);
17653
17654 plt0_entry = elf32_arm_plt0_entry;
52ab56c2
PB		 17655 put_arm_insn (htab, output_bfd, plt0_entry[0],
17656 splt->contents + 0);
17657 put_arm_insn (htab, output_bfd, plt0_entry[1],
17658 splt->contents + 4);
17659 put_arm_insn (htab, output_bfd, plt0_entry[2],
17660 splt->contents + 8);
17661 put_arm_insn (htab, output_bfd, plt0_entry[3],
17662 splt->contents + 12);
5e681ec4 17663
5e681ec4 17664#ifdef FOUR_WORD_PLT
00a97672
RS		 17665 /* The displacement value goes in the otherwise-unused
17666 last word of the second entry. */
17667 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5e681ec4 17668#else
00a97672 17669 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5e681ec4 17670#endif
00a97672 17671 }
f7a74f8c 17672 }
252b5132
RH		 17673
17674 /* UnixWare sets the entsize of .plt to 4, although that doesn't
17675 really seem like the right value. */
74541ad4
AM		 17676 if (splt->output_section->owner == output_bfd)
17677 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
00a97672 17678
0855e32b
NS		 17679 if (htab->dt_tlsdesc_plt)
17680 {
17681 bfd_vma got_address
17682 = sgot->output_section->vma + sgot->output_offset;
17683 bfd_vma gotplt_address = (htab->root.sgot->output_section->vma
17684 + htab->root.sgot->output_offset);
17685 bfd_vma plt_address
17686 = splt->output_section->vma + splt->output_offset;
17687
b38cadfb 17688 arm_put_trampoline (htab, output_bfd,
0855e32b
NS		 17689 splt->contents + htab->dt_tlsdesc_plt,
17690 dl_tlsdesc_lazy_trampoline, 6);
17691
17692 bfd_put_32 (output_bfd,
17693 gotplt_address + htab->dt_tlsdesc_got
17694 - (plt_address + htab->dt_tlsdesc_plt)
17695 - dl_tlsdesc_lazy_trampoline[6],
17696 splt->contents + htab->dt_tlsdesc_plt + 24);
17697 bfd_put_32 (output_bfd,
17698 got_address - (plt_address + htab->dt_tlsdesc_plt)
17699 - dl_tlsdesc_lazy_trampoline[7],
17700 splt->contents + htab->dt_tlsdesc_plt + 24 + 4);
17701 }
17702
17703 if (htab->tls_trampoline)
17704 {
b38cadfb 17705 arm_put_trampoline (htab, output_bfd,
0855e32b
NS		 17706 splt->contents + htab->tls_trampoline,
17707 tls_trampoline, 3);
17708#ifdef FOUR_WORD_PLT
17709 bfd_put_32 (output_bfd, 0x00000000,
17710 splt->contents + htab->tls_trampoline + 12);
b38cadfb 17711#endif
0855e32b
NS		 17712 }
17713
0e1862bb
L		 17714 if (htab->vxworks_p
17715 && !bfd_link_pic (info)
17716 && htab->root.splt->size > 0)
00a97672
RS		 17717 {
17718 /* Correct the .rel(a).plt.unloaded relocations. They will have
17719 incorrect symbol indexes. */
17720 int num_plts;
eed62c48 17721 unsigned char *p;
00a97672 17722
362d30a1 17723 num_plts = ((htab->root.splt->size - htab->plt_header_size)
00a97672
RS		 17724 / htab->plt_entry_size);
17725 p = htab->srelplt2->contents + RELOC_SIZE (htab);
17726
17727 for (; num_plts; num_plts--)
17728 {
17729 Elf_Internal_Rela rel;
17730
17731 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
17732 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
17733 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
17734 p += RELOC_SIZE (htab);
17735
17736 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
17737 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
17738 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
17739 p += RELOC_SIZE (htab);
17740 }
17741 }
252b5132
RH		 17742 }
17743
99059e56
RM		 17744 if (htab->nacl_p && htab->root.iplt != NULL && htab->root.iplt->size > 0)
17745 /* NaCl uses a special first entry in .iplt too. */
17746 arm_nacl_put_plt0 (htab, output_bfd, htab->root.iplt, 0);
17747
252b5132 17748 /* Fill in the first three entries in the global offset table. */
229fcec5 17749 if (sgot)
252b5132 17750 {
229fcec5
MM		 17751 if (sgot->size > 0)
17752 {
17753 if (sdyn == NULL)
17754 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
17755 else
17756 bfd_put_32 (output_bfd,
17757 sdyn->output_section->vma + sdyn->output_offset,
17758 sgot->contents);
17759 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
17760 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
17761 }
252b5132 17762
229fcec5
MM		 17763 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
17764 }
252b5132 17765
e8b09b87
CL		 17766 /* At the very end of the .rofixup section is a pointer to the GOT. */
17767 if (htab->fdpic_p && htab->srofixup != NULL)
17768 {
17769 struct elf_link_hash_entry *hgot = htab->root.hgot;
17770
17771 bfd_vma got_value = hgot->root.u.def.value
17772 + hgot->root.u.def.section->output_section->vma
17773 + hgot->root.u.def.section->output_offset;
17774
17775 arm_elf_add_rofixup(output_bfd, htab->srofixup, got_value);
17776
17777 /* Make sure we allocated and generated the same number of fixups. */
17778 BFD_ASSERT (htab->srofixup->reloc_count * 4 == htab->srofixup->size);
17779 }
17780
b34976b6 17781 return TRUE;
252b5132
RH		 17782}
17783
ed7e9d0b
AM		 17784static bfd_boolean
17785elf32_arm_init_file_header (bfd *abfd, struct bfd_link_info *link_info)
ba96a88f 17786{
9b485d32 17787 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
e489d0ae 17788 struct elf32_arm_link_hash_table *globals;
ac4c9b04 17789 struct elf_segment_map *m;
ba96a88f 17790
ed7e9d0b
AM		 17791 if (!_bfd_elf_init_file_header (abfd, link_info))
17792 return FALSE;
17793
ba96a88f
NC		 17794 i_ehdrp = elf_elfheader (abfd);
17795
94a3258f
PB		 17796 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
17797 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
ba96a88f 17798 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
e489d0ae 17799
93204d3a
PB		 17800 if (link_info)
17801 {
17802 globals = elf32_arm_hash_table (link_info);
4dfe6ac6 17803 if (globals != NULL && globals->byteswap_code)
93204d3a 17804 i_ehdrp->e_flags |= EF_ARM_BE8;
18a20338
CL		 17805
17806 if (globals->fdpic_p)
17807 i_ehdrp->e_ident[EI_OSABI] |= ELFOSABI_ARM_FDPIC;
93204d3a 17808 }
3bfcb652
NC		 17809
17810 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_VER5
17811 && ((i_ehdrp->e_type == ET_DYN) || (i_ehdrp->e_type == ET_EXEC)))
17812 {
17813 int abi = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_ABI_VFP_args);
5c294fee 17814 if (abi == AEABI_VFP_args_vfp)
3bfcb652
NC		 17815 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_HARD;
17816 else
17817 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_SOFT;
17818 }
ac4c9b04
MG		 17819
17820 /* Scan segment to set p_flags attribute if it contains only sections with
f0728ee3 17821 SHF_ARM_PURECODE flag. */
ac4c9b04
MG		 17822 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
17823 {
17824 unsigned int j;
17825
17826 if (m->count == 0)
17827 continue;
17828 for (j = 0; j < m->count; j++)
17829 {
f0728ee3 17830 if (!(elf_section_flags (m->sections[j]) & SHF_ARM_PURECODE))
ac4c9b04
MG		 17831 break;
17832 }
17833 if (j == m->count)
17834 {
17835 m->p_flags = PF_X;
17836 m->p_flags_valid = 1;
17837 }
17838 }
ed7e9d0b 17839 return TRUE;
ba96a88f
NC		 17840}
17841
99e4ae17 17842static enum elf_reloc_type_class
7e612e98
AM		 17843elf32_arm_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
17844 const asection *rel_sec ATTRIBUTE_UNUSED,
17845 const Elf_Internal_Rela *rela)
99e4ae17 17846{
f51e552e 17847 switch ((int) ELF32_R_TYPE (rela->r_info))
99e4ae17
AJ		 17848 {
17849 case R_ARM_RELATIVE:
17850 return reloc_class_relative;
17851 case R_ARM_JUMP_SLOT:
17852 return reloc_class_plt;
17853 case R_ARM_COPY:
17854 return reloc_class_copy;
109575d7
JW		 17855 case R_ARM_IRELATIVE:
17856 return reloc_class_ifunc;
99e4ae17
AJ		 17857 default:
17858 return reloc_class_normal;
17859 }
17860}
17861
e489d0ae 17862static void
cc364be6 17863arm_final_write_processing (bfd *abfd)
e16bb312 17864{
5a6c6817 17865 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
e16bb312
NC		 17866}
17867
cc364be6
AM		 17868static bfd_boolean
17869elf32_arm_final_write_processing (bfd *abfd)
06f44071 17870{
cc364be6
AM		 17871 arm_final_write_processing (abfd);
17872 return _bfd_elf_final_write_processing (abfd);
06f44071
AM		 17873}
17874
40a18ebd
NC		 17875/* Return TRUE if this is an unwinding table entry. */
17876
17877static bfd_boolean
17878is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
17879{
0112cd26
NC		 17880 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
17881 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
40a18ebd
NC		 17882}
17883
17884
17885/* Set the type and flags for an ARM section. We do this by
17886 the section name, which is a hack, but ought to work. */
17887
17888static bfd_boolean
17889elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
17890{
17891 const char * name;
17892
fd361982 17893 name = bfd_section_name (sec);
40a18ebd
NC		 17894
17895 if (is_arm_elf_unwind_section_name (abfd, name))
17896 {
17897 hdr->sh_type = SHT_ARM_EXIDX;
17898 hdr->sh_flags |= SHF_LINK_ORDER;
17899 }
ac4c9b04 17900
f0728ee3
AV		 17901 if (sec->flags & SEC_ELF_PURECODE)
17902 hdr->sh_flags |= SHF_ARM_PURECODE;
ac4c9b04 17903
40a18ebd
NC		 17904 return TRUE;
17905}
17906
6dc132d9
L		 17907/* Handle an ARM specific section when reading an object file. This is
17908 called when bfd_section_from_shdr finds a section with an unknown
17909 type. */
40a18ebd
NC		 17910
17911static bfd_boolean
17912elf32_arm_section_from_shdr (bfd *abfd,
17913 Elf_Internal_Shdr * hdr,
6dc132d9
L		 17914 const char *name,
17915 int shindex)
40a18ebd
NC		 17916{
17917 /* There ought to be a place to keep ELF backend specific flags, but
17918 at the moment there isn't one. We just keep track of the
17919 sections by their name, instead. Fortunately, the ABI gives
17920 names for all the ARM specific sections, so we will probably get
17921 away with this. */
17922 switch (hdr->sh_type)
17923 {
17924 case SHT_ARM_EXIDX:
0951f019
RE		 17925 case SHT_ARM_PREEMPTMAP:
17926 case SHT_ARM_ATTRIBUTES:
40a18ebd
NC		 17927 break;
17928
17929 default:
17930 return FALSE;
17931 }
17932
6dc132d9 17933 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
40a18ebd
NC		 17934 return FALSE;
17935
17936 return TRUE;
17937}
e489d0ae 17938
44444f50
NC		 17939static _arm_elf_section_data *
17940get_arm_elf_section_data (asection * sec)
17941{
47b2e99c
JZ		 17942 if (sec && sec->owner && is_arm_elf (sec->owner))
17943 return elf32_arm_section_data (sec);
44444f50
NC		 17944 else
17945 return NULL;
8e3de13a
NC		 17946}
17947
4e617b1e
PB		 17948typedef struct
17949{
57402f1e 17950 void *flaginfo;
4e617b1e 17951 struct bfd_link_info *info;
91a5743d
PB		 17952 asection *sec;
17953 int sec_shndx;
6e0b88f1
AM		 17954 int (*func) (void *, const char *, Elf_Internal_Sym *,
17955 asection *, struct elf_link_hash_entry *);
4e617b1e
PB		 17956} output_arch_syminfo;
17957
17958enum map_symbol_type
17959{
17960 ARM_MAP_ARM,
17961 ARM_MAP_THUMB,
17962 ARM_MAP_DATA
17963};
17964
17965
7413f23f 17966/* Output a single mapping symbol. */
4e617b1e
PB		 17967
17968static bfd_boolean
7413f23f
DJ		 17969elf32_arm_output_map_sym (output_arch_syminfo *osi,
17970 enum map_symbol_type type,
17971 bfd_vma offset)
4e617b1e
PB		 17972{
17973 static const char *names[3] = {"$a", "$t", "$d"};
4e617b1e
PB		 17974 Elf_Internal_Sym sym;
17975
91a5743d
PB		 17976 sym.st_value = osi->sec->output_section->vma
17977 + osi->sec->output_offset
17978 + offset;
4e617b1e
PB		 17979 sym.st_size = 0;
17980 sym.st_other = 0;
17981 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
91a5743d 17982 sym.st_shndx = osi->sec_shndx;
35fc36a8 17983 sym.st_target_internal = 0;
fe33d2fa 17984 elf32_arm_section_map_add (osi->sec, names[type][1], offset);
57402f1e 17985 return osi->func (osi->flaginfo, names[type], &sym, osi->sec, NULL) == 1;
4e617b1e
PB		 17986}
17987
34e77a92
RS		 17988/* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
17989 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
4e617b1e
PB		 17990
17991static bfd_boolean
34e77a92
RS		 17992elf32_arm_output_plt_map_1 (output_arch_syminfo *osi,
17993 bfd_boolean is_iplt_entry_p,
17994 union gotplt_union *root_plt,
17995 struct arm_plt_info *arm_plt)
4e617b1e 17996{
4e617b1e 17997 struct elf32_arm_link_hash_table *htab;
34e77a92 17998 bfd_vma addr, plt_header_size;
4e617b1e 17999
34e77a92 18000 if (root_plt->offset == (bfd_vma) -1)
4e617b1e
PB		 18001 return TRUE;
18002
4dfe6ac6
NC		 18003 htab = elf32_arm_hash_table (osi->info);
18004 if (htab == NULL)
18005 return FALSE;
18006
34e77a92
RS		 18007 if (is_iplt_entry_p)
18008 {
18009 osi->sec = htab->root.iplt;
18010 plt_header_size = 0;
18011 }
18012 else
18013 {
18014 osi->sec = htab->root.splt;
18015 plt_header_size = htab->plt_header_size;
18016 }
18017 osi->sec_shndx = (_bfd_elf_section_from_bfd_section
18018 (osi->info->output_bfd, osi->sec->output_section));
18019
18020 addr = root_plt->offset & -2;
4e617b1e
PB		 18021 if (htab->symbian_p)
18022 {
7413f23f 18023 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
4e617b1e 18024 return FALSE;
7413f23f 18025 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
4e617b1e
PB		 18026 return FALSE;
18027 }
18028 else if (htab->vxworks_p)
18029 {
7413f23f 18030 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
4e617b1e 18031 return FALSE;
7413f23f 18032 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
4e617b1e 18033 return FALSE;
7413f23f 18034 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
4e617b1e 18035 return FALSE;
7413f23f 18036 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
4e617b1e
PB		 18037 return FALSE;
18038 }
b38cadfb
NC		 18039 else if (htab->nacl_p)
18040 {
18041 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
18042 return FALSE;
18043 }
7801f98f
CL		 18044 else if (htab->fdpic_p)
18045 {
59029f57
CL		 18046 enum map_symbol_type type = using_thumb_only(htab)
18047 ? ARM_MAP_THUMB
18048 : ARM_MAP_ARM;
18049
7801f98f 18050 if (elf32_arm_plt_needs_thumb_stub_p (osi->info, arm_plt))
4b24dd1a
AM		 18051 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
18052 return FALSE;
59029f57 18053 if (!elf32_arm_output_map_sym (osi, type, addr))
4b24dd1a 18054 return FALSE;
7801f98f 18055 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 16))
4b24dd1a 18056 return FALSE;
7801f98f 18057 if (htab->plt_entry_size == 4 * ARRAY_SIZE(elf32_arm_fdpic_plt_entry))
4b24dd1a
AM		 18058 if (!elf32_arm_output_map_sym (osi, type, addr + 24))
18059 return FALSE;
7801f98f 18060 }
eed94f8f
NC		 18061 else if (using_thumb_only (htab))
18062 {
18063 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
18064 return FALSE;
6a631e86 18065 }
4e617b1e
PB		 18066 else
18067 {
34e77a92 18068 bfd_boolean thumb_stub_p;
bd97cb95 18069
34e77a92
RS		 18070 thumb_stub_p = elf32_arm_plt_needs_thumb_stub_p (osi->info, arm_plt);
18071 if (thumb_stub_p)
4e617b1e 18072 {
7413f23f 18073 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
4e617b1e
PB		 18074 return FALSE;
18075 }
18076#ifdef FOUR_WORD_PLT
7413f23f 18077 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
4e617b1e 18078 return FALSE;
7413f23f 18079 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
4e617b1e
PB		 18080 return FALSE;
18081#else
906e58ca 18082 /* A three-word PLT with no Thumb thunk contains only Arm code,
4e617b1e
PB		 18083 so only need to output a mapping symbol for the first PLT entry and
18084 entries with thumb thunks. */
34e77a92 18085 if (thumb_stub_p || addr == plt_header_size)
4e617b1e 18086 {
7413f23f 18087 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
4e617b1e
PB		 18088 return FALSE;
18089 }
18090#endif
18091 }
18092
18093 return TRUE;
18094}
18095
34e77a92
RS		 18096/* Output mapping symbols for PLT entries associated with H. */
18097
18098static bfd_boolean
18099elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
18100{
18101 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
18102 struct elf32_arm_link_hash_entry *eh;
18103
18104 if (h->root.type == bfd_link_hash_indirect)
18105 return TRUE;
18106
18107 if (h->root.type == bfd_link_hash_warning)
18108 /* When warning symbols are created, they **replace** the "real"
18109 entry in the hash table, thus we never get to see the real
18110 symbol in a hash traversal. So look at it now. */
18111 h = (struct elf_link_hash_entry *) h->root.u.i.link;
18112
18113 eh = (struct elf32_arm_link_hash_entry *) h;
18114 return elf32_arm_output_plt_map_1 (osi, SYMBOL_CALLS_LOCAL (osi->info, h),
18115 &h->plt, &eh->plt);
18116}
18117
4f4faa4d
TP		 18118/* Bind a veneered symbol to its veneer identified by its hash entry
18119 STUB_ENTRY. The veneered location thus loose its symbol. */
18120
18121static void
18122arm_stub_claim_sym (struct elf32_arm_stub_hash_entry *stub_entry)
18123{
18124 struct elf32_arm_link_hash_entry *hash = stub_entry->h;
18125
18126 BFD_ASSERT (hash);
18127 hash->root.root.u.def.section = stub_entry->stub_sec;
18128 hash->root.root.u.def.value = stub_entry->stub_offset;
18129 hash->root.size = stub_entry->stub_size;
18130}
18131
7413f23f
DJ		 18132/* Output a single local symbol for a generated stub. */
18133
18134static bfd_boolean
18135elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
18136 bfd_vma offset, bfd_vma size)
18137{
7413f23f
DJ		 18138 Elf_Internal_Sym sym;
18139
7413f23f
DJ		 18140 sym.st_value = osi->sec->output_section->vma
18141 + osi->sec->output_offset
18142 + offset;
18143 sym.st_size = size;
18144 sym.st_other = 0;
18145 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
18146 sym.st_shndx = osi->sec_shndx;
35fc36a8 18147 sym.st_target_internal = 0;
57402f1e 18148 return osi->func (osi->flaginfo, name, &sym, osi->sec, NULL) == 1;
7413f23f 18149}
4e617b1e 18150
da5938a2 18151static bfd_boolean
8029a119
NC		 18152arm_map_one_stub (struct bfd_hash_entry * gen_entry,
18153 void * in_arg)
da5938a2
NC		 18154{
18155 struct elf32_arm_stub_hash_entry *stub_entry;
da5938a2
NC		 18156 asection *stub_sec;
18157 bfd_vma addr;
7413f23f 18158 char *stub_name;
9a008db3 18159 output_arch_syminfo *osi;
d3ce72d0 18160 const insn_sequence *template_sequence;
461a49ca
DJ		 18161 enum stub_insn_type prev_type;
18162 int size;
18163 int i;
18164 enum map_symbol_type sym_type;
da5938a2
NC		 18165
18166 /* Massage our args to the form they really have. */
18167 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
9a008db3 18168 osi = (output_arch_syminfo *) in_arg;
da5938a2 18169
da5938a2
NC		 18170 stub_sec = stub_entry->stub_sec;
18171
18172 /* Ensure this stub is attached to the current section being
7413f23f 18173 processed. */
da5938a2
NC		 18174 if (stub_sec != osi->sec)
18175 return TRUE;
18176
7413f23f 18177 addr = (bfd_vma) stub_entry->stub_offset;
d3ce72d0 18178 template_sequence = stub_entry->stub_template;
4f4faa4d
TP		 18179
18180 if (arm_stub_sym_claimed (stub_entry->stub_type))
18181 arm_stub_claim_sym (stub_entry);
18182 else
7413f23f 18183 {
4f4faa4d
TP		 18184 stub_name = stub_entry->output_name;
18185 switch (template_sequence[0].type)
18186 {
18187 case ARM_TYPE:
18188 if (!elf32_arm_output_stub_sym (osi, stub_name, addr,
18189 stub_entry->stub_size))
18190 return FALSE;
18191 break;
18192 case THUMB16_TYPE:
18193 case THUMB32_TYPE:
18194 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1,
18195 stub_entry->stub_size))
18196 return FALSE;
18197 break;
18198 default:
18199 BFD_FAIL ();
18200 return 0;
18201 }
7413f23f 18202 }
da5938a2 18203
461a49ca
DJ		 18204 prev_type = DATA_TYPE;
18205 size = 0;
18206 for (i = 0; i < stub_entry->stub_template_size; i++)
18207 {
d3ce72d0 18208 switch (template_sequence[i].type)
461a49ca
DJ		 18209 {
18210 case ARM_TYPE:
18211 sym_type = ARM_MAP_ARM;
18212 break;
18213
18214 case THUMB16_TYPE:
48229727 18215 case THUMB32_TYPE:
461a49ca
DJ		 18216 sym_type = ARM_MAP_THUMB;
18217 break;
18218
18219 case DATA_TYPE:
18220 sym_type = ARM_MAP_DATA;
18221 break;
18222
18223 default:
18224 BFD_FAIL ();
4e31c731 18225 return FALSE;
461a49ca
DJ		 18226 }
18227
d3ce72d0 18228 if (template_sequence[i].type != prev_type)
461a49ca 18229 {
d3ce72d0 18230 prev_type = template_sequence[i].type;
461a49ca
DJ		 18231 if (!elf32_arm_output_map_sym (osi, sym_type, addr + size))
18232 return FALSE;
18233 }
18234
d3ce72d0 18235 switch (template_sequence[i].type)
461a49ca
DJ		 18236 {
18237 case ARM_TYPE:
48229727 18238 case THUMB32_TYPE:
461a49ca
DJ		 18239 size += 4;
18240 break;
18241
18242 case THUMB16_TYPE:
18243 size += 2;
18244 break;
18245
18246 case DATA_TYPE:
18247 size += 4;
18248 break;
18249
18250 default:
18251 BFD_FAIL ();
4e31c731 18252 return FALSE;
461a49ca
DJ		 18253 }
18254 }
18255
da5938a2
NC		 18256 return TRUE;
18257}
18258
33811162
DG		 18259/* Output mapping symbols for linker generated sections,
18260 and for those data-only sections that do not have a
18261 $d. */
4e617b1e
PB		 18262
18263static bfd_boolean
18264elf32_arm_output_arch_local_syms (bfd *output_bfd,
906e58ca 18265 struct bfd_link_info *info,
57402f1e 18266 void *flaginfo,
6e0b88f1
AM		 18267 int (*func) (void *, const char *,
18268 Elf_Internal_Sym *,
18269 asection *,
18270 struct elf_link_hash_entry *))
4e617b1e
PB		 18271{
18272 output_arch_syminfo osi;
18273 struct elf32_arm_link_hash_table *htab;
91a5743d
PB		 18274 bfd_vma offset;
18275 bfd_size_type size;
33811162 18276 bfd *input_bfd;
4e617b1e
PB		 18277
18278 htab = elf32_arm_hash_table (info);
4dfe6ac6
NC		 18279 if (htab == NULL)
18280 return FALSE;
18281
906e58ca 18282 check_use_blx (htab);
91a5743d 18283
57402f1e 18284 osi.flaginfo = flaginfo;
4e617b1e
PB		 18285 osi.info = info;
18286 osi.func = func;
906e58ca 18287
33811162
DG		 18288 /* Add a $d mapping symbol to data-only sections that
18289 don't have any mapping symbol. This may result in (harmless) redundant
18290 mapping symbols. */
18291 for (input_bfd = info->input_bfds;
18292 input_bfd != NULL;
c72f2fb2 18293 input_bfd = input_bfd->link.next)
33811162
DG		 18294 {
18295 if ((input_bfd->flags & (BFD_LINKER_CREATED | HAS_SYMS)) == HAS_SYMS)
18296 for (osi.sec = input_bfd->sections;
18297 osi.sec != NULL;
18298 osi.sec = osi.sec->next)
18299 {
18300 if (osi.sec->output_section != NULL
f7dd8c79
DJ		 18301 && ((osi.sec->output_section->flags & (SEC_ALLOC | SEC_CODE))
18302 != 0)
33811162
DG		 18303 && (osi.sec->flags & (SEC_HAS_CONTENTS | SEC_LINKER_CREATED))
18304 == SEC_HAS_CONTENTS
18305 && get_arm_elf_section_data (osi.sec) != NULL
501abfe0 18306 && get_arm_elf_section_data (osi.sec)->mapcount == 0
7d500b83
CL		 18307 && osi.sec->size > 0
18308 && (osi.sec->flags & SEC_EXCLUDE) == 0)
33811162
DG		 18309 {
18310 osi.sec_shndx = _bfd_elf_section_from_bfd_section
18311 (output_bfd, osi.sec->output_section);
18312 if (osi.sec_shndx != (int)SHN_BAD)
18313 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 0);
18314 }
18315 }
18316 }
18317
91a5743d
PB		 18318 /* ARM->Thumb glue. */
18319 if (htab->arm_glue_size > 0)
18320 {
3d4d4302
AM		 18321 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
18322 ARM2THUMB_GLUE_SECTION_NAME);
91a5743d
PB		 18323
18324 osi.sec_shndx = _bfd_elf_section_from_bfd_section
18325 (output_bfd, osi.sec->output_section);
0e1862bb 18326 if (bfd_link_pic (info) || htab->root.is_relocatable_executable
91a5743d
PB		 18327 || htab->pic_veneer)
18328 size = ARM2THUMB_PIC_GLUE_SIZE;
18329 else if (htab->use_blx)
18330 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
18331 else
18332 size = ARM2THUMB_STATIC_GLUE_SIZE;
4e617b1e 18333
91a5743d
PB		 18334 for (offset = 0; offset < htab->arm_glue_size; offset += size)
18335 {
7413f23f
DJ		 18336 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
18337 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
91a5743d
PB		 18338 }
18339 }
18340
18341 /* Thumb->ARM glue. */
18342 if (htab->thumb_glue_size > 0)
18343 {
3d4d4302
AM		 18344 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
18345 THUMB2ARM_GLUE_SECTION_NAME);
91a5743d
PB		 18346
18347 osi.sec_shndx = _bfd_elf_section_from_bfd_section
18348 (output_bfd, osi.sec->output_section);
18349 size = THUMB2ARM_GLUE_SIZE;
18350
18351 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
18352 {
7413f23f
DJ		 18353 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
18354 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
91a5743d
PB		 18355 }
18356 }
18357
845b51d6
PB		 18358 /* ARMv4 BX veneers. */
18359 if (htab->bx_glue_size > 0)
18360 {
3d4d4302
AM		 18361 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
18362 ARM_BX_GLUE_SECTION_NAME);
845b51d6
PB		 18363
18364 osi.sec_shndx = _bfd_elf_section_from_bfd_section
18365 (output_bfd, osi.sec->output_section);
18366
7413f23f 18367 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
845b51d6
PB		 18368 }
18369
8029a119
NC		 18370 /* Long calls stubs. */
18371 if (htab->stub_bfd && htab->stub_bfd->sections)
18372 {
da5938a2 18373 asection* stub_sec;
8029a119 18374
da5938a2
NC		 18375 for (stub_sec = htab->stub_bfd->sections;
18376 stub_sec != NULL;
8029a119
NC		 18377 stub_sec = stub_sec->next)
18378 {
18379 /* Ignore non-stub sections. */
18380 if (!strstr (stub_sec->name, STUB_SUFFIX))
18381 continue;
da5938a2 18382
8029a119 18383 osi.sec = stub_sec;
da5938a2 18384
8029a119
NC		 18385 osi.sec_shndx = _bfd_elf_section_from_bfd_section
18386 (output_bfd, osi.sec->output_section);
da5938a2 18387
8029a119
NC		 18388 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
18389 }
18390 }
da5938a2 18391
91a5743d 18392 /* Finally, output mapping symbols for the PLT. */
34e77a92 18393 if (htab->root.splt && htab->root.splt->size > 0)
4e617b1e 18394 {
34e77a92
RS		 18395 osi.sec = htab->root.splt;
18396 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
18397 (output_bfd, osi.sec->output_section));
18398
18399 /* Output mapping symbols for the plt header. SymbianOS does not have a
18400 plt header. */
18401 if (htab->vxworks_p)
18402 {
18403 /* VxWorks shared libraries have no PLT header. */
0e1862bb 18404 if (!bfd_link_pic (info))
34e77a92
RS		 18405 {
18406 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
18407 return FALSE;
18408 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
18409 return FALSE;
18410 }
18411 }
b38cadfb
NC		 18412 else if (htab->nacl_p)
18413 {
18414 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
18415 return FALSE;
18416 }
59029f57 18417 else if (using_thumb_only (htab) && !htab->fdpic_p)
eed94f8f
NC		 18418 {
18419 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 0))
18420 return FALSE;
18421 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
18422 return FALSE;
18423 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 16))
18424 return FALSE;
18425 }
e8b09b87 18426 else if (!htab->symbian_p && !htab->fdpic_p)
4e617b1e 18427 {
7413f23f 18428 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
4e617b1e 18429 return FALSE;
34e77a92
RS		 18430#ifndef FOUR_WORD_PLT
18431 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
4e617b1e 18432 return FALSE;
34e77a92 18433#endif
4e617b1e
PB		 18434 }
18435 }
99059e56
RM		 18436 if (htab->nacl_p && htab->root.iplt && htab->root.iplt->size > 0)
18437 {
18438 /* NaCl uses a special first entry in .iplt too. */
18439 osi.sec = htab->root.iplt;
18440 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
18441 (output_bfd, osi.sec->output_section));
18442 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
18443 return FALSE;
18444 }
34e77a92
RS		 18445 if ((htab->root.splt && htab->root.splt->size > 0)
18446 || (htab->root.iplt && htab->root.iplt->size > 0))
4e617b1e 18447 {
34e77a92
RS		 18448 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, &osi);
18449 for (input_bfd = info->input_bfds;
18450 input_bfd != NULL;
c72f2fb2 18451 input_bfd = input_bfd->link.next)
34e77a92
RS		 18452 {
18453 struct arm_local_iplt_info **local_iplt;
18454 unsigned int i, num_syms;
4e617b1e 18455
34e77a92
RS		 18456 local_iplt = elf32_arm_local_iplt (input_bfd);
18457 if (local_iplt != NULL)
18458 {
18459 num_syms = elf_symtab_hdr (input_bfd).sh_info;
18460 for (i = 0; i < num_syms; i++)
18461 if (local_iplt[i] != NULL
18462 && !elf32_arm_output_plt_map_1 (&osi, TRUE,
18463 &local_iplt[i]->root,
18464 &local_iplt[i]->arm))
18465 return FALSE;
18466 }
18467 }
18468 }
0855e32b
NS		 18469 if (htab->dt_tlsdesc_plt != 0)
18470 {
18471 /* Mapping symbols for the lazy tls trampoline. */
18472 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->dt_tlsdesc_plt))
18473 return FALSE;
b38cadfb 18474
0855e32b
NS		 18475 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
18476 htab->dt_tlsdesc_plt + 24))
18477 return FALSE;
18478 }
18479 if (htab->tls_trampoline != 0)
18480 {
18481 /* Mapping symbols for the tls trampoline. */
18482 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->tls_trampoline))
18483 return FALSE;
18484#ifdef FOUR_WORD_PLT
18485 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
18486 htab->tls_trampoline + 12))
18487 return FALSE;
b38cadfb 18488#endif
0855e32b 18489 }
b38cadfb 18490
4e617b1e
PB		 18491 return TRUE;
18492}
18493
54ddd295
TP		 18494/* Filter normal symbols of CMSE entry functions of ABFD to include in
18495 the import library. All SYMCOUNT symbols of ABFD can be examined
18496 from their pointers in SYMS. Pointers of symbols to keep should be
18497 stored continuously at the beginning of that array.
18498
18499 Returns the number of symbols to keep. */
18500
18501static unsigned int
18502elf32_arm_filter_cmse_symbols (bfd *abfd ATTRIBUTE_UNUSED,
18503 struct bfd_link_info *info,
18504 asymbol **syms, long symcount)
18505{
18506 size_t maxnamelen;
18507 char *cmse_name;
18508 long src_count, dst_count = 0;
18509 struct elf32_arm_link_hash_table *htab;
18510
18511 htab = elf32_arm_hash_table (info);
18512 if (!htab->stub_bfd || !htab->stub_bfd->sections)
18513 symcount = 0;
18514
18515 maxnamelen = 128;
18516 cmse_name = (char *) bfd_malloc (maxnamelen);
7a0fb7be
NC		 18517 BFD_ASSERT (cmse_name);
18518
54ddd295
TP		 18519 for (src_count = 0; src_count < symcount; src_count++)
18520 {
18521 struct elf32_arm_link_hash_entry *cmse_hash;
18522 asymbol *sym;
18523 flagword flags;
18524 char *name;
18525 size_t namelen;
18526
18527 sym = syms[src_count];
18528 flags = sym->flags;
18529 name = (char *) bfd_asymbol_name (sym);
18530
18531 if ((flags & BSF_FUNCTION) != BSF_FUNCTION)
18532 continue;
18533 if (!(flags & (BSF_GLOBAL | BSF_WEAK)))
18534 continue;
18535
18536 namelen = strlen (name) + sizeof (CMSE_PREFIX) + 1;
18537 if (namelen > maxnamelen)
18538 {
18539 cmse_name = (char *)
18540 bfd_realloc (cmse_name, namelen);
18541 maxnamelen = namelen;
18542 }
18543 snprintf (cmse_name, maxnamelen, "%s%s", CMSE_PREFIX, name);
18544 cmse_hash = (struct elf32_arm_link_hash_entry *)
18545 elf_link_hash_lookup (&(htab)->root, cmse_name, FALSE, FALSE, TRUE);
18546
18547 if (!cmse_hash
18548 || (cmse_hash->root.root.type != bfd_link_hash_defined
18549 && cmse_hash->root.root.type != bfd_link_hash_defweak)
18550 || cmse_hash->root.type != STT_FUNC)
18551 continue;
18552
54ddd295
TP		 18553 syms[dst_count++] = sym;
18554 }
18555 free (cmse_name);
18556
18557 syms[dst_count] = NULL;
18558
18559 return dst_count;
18560}
18561
18562/* Filter symbols of ABFD to include in the import library. All
18563 SYMCOUNT symbols of ABFD can be examined from their pointers in
18564 SYMS. Pointers of symbols to keep should be stored continuously at
18565 the beginning of that array.
18566
18567 Returns the number of symbols to keep. */
18568
18569static unsigned int
18570elf32_arm_filter_implib_symbols (bfd *abfd ATTRIBUTE_UNUSED,
18571 struct bfd_link_info *info,
18572 asymbol **syms, long symcount)
18573{
18574 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
18575
046734ff
TP		 18576 /* Requirement 8 of "ARM v8-M Security Extensions: Requirements on
18577 Development Tools" (ARM-ECM-0359818) mandates Secure Gateway import
18578 library to be a relocatable object file. */
18579 BFD_ASSERT (!(bfd_get_file_flags (info->out_implib_bfd) & EXEC_P));
54ddd295
TP		 18580 if (globals->cmse_implib)
18581 return elf32_arm_filter_cmse_symbols (abfd, info, syms, symcount);
18582 else
18583 return _bfd_elf_filter_global_symbols (abfd, info, syms, symcount);
18584}
18585
e489d0ae
PB		 18586/* Allocate target specific section data. */
18587
18588static bfd_boolean
18589elf32_arm_new_section_hook (bfd *abfd, asection *sec)
18590{
f592407e
AM		 18591 if (!sec->used_by_bfd)
18592 {
18593 _arm_elf_section_data *sdata;
986f0783 18594 size_t amt = sizeof (*sdata);
e489d0ae 18595
21d799b5 18596 sdata = (_arm_elf_section_data *) bfd_zalloc (abfd, amt);
f592407e
AM		 18597 if (sdata == NULL)
18598 return FALSE;
18599 sec->used_by_bfd = sdata;
18600 }
e489d0ae
PB		 18601
18602 return _bfd_elf_new_section_hook (abfd, sec);
18603}
18604
18605
18606/* Used to order a list of mapping symbols by address. */
18607
18608static int
18609elf32_arm_compare_mapping (const void * a, const void * b)
18610{
7f6a71ff
JM		 18611 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
18612 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
18613
18614 if (amap->vma > bmap->vma)
18615 return 1;
18616 else if (amap->vma < bmap->vma)
18617 return -1;
18618 else if (amap->type > bmap->type)
18619 /* Ensure results do not depend on the host qsort for objects with
18620 multiple mapping symbols at the same address by sorting on type
18621 after vma. */
18622 return 1;
18623 else if (amap->type < bmap->type)
18624 return -1;
18625 else
18626 return 0;
e489d0ae
PB		 18627}
18628
2468f9c9
PB		 18629/* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
18630
18631static unsigned long
18632offset_prel31 (unsigned long addr, bfd_vma offset)
18633{
18634 return (addr & ~0x7ffffffful) | ((addr + offset) & 0x7ffffffful);
18635}
18636
18637/* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
18638 relocations. */
18639
18640static void
18641copy_exidx_entry (bfd *output_bfd, bfd_byte *to, bfd_byte *from, bfd_vma offset)
18642{
18643 unsigned long first_word = bfd_get_32 (output_bfd, from);
18644 unsigned long second_word = bfd_get_32 (output_bfd, from + 4);
b38cadfb 18645
2468f9c9
PB		 18646 /* High bit of first word is supposed to be zero. */
18647 if ((first_word & 0x80000000ul) == 0)
18648 first_word = offset_prel31 (first_word, offset);
b38cadfb 18649
2468f9c9
PB		 18650 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
18651 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
18652 if ((second_word != 0x1) && ((second_word & 0x80000000ul) == 0))
18653 second_word = offset_prel31 (second_word, offset);
b38cadfb 18654
2468f9c9
PB		 18655 bfd_put_32 (output_bfd, first_word, to);
18656 bfd_put_32 (output_bfd, second_word, to + 4);
18657}
e489d0ae 18658
48229727
JB		 18659/* Data for make_branch_to_a8_stub(). */
18660
b38cadfb
NC		 18661struct a8_branch_to_stub_data
18662{
48229727
JB		 18663 asection *writing_section;
18664 bfd_byte *contents;
18665};
18666
18667
18668/* Helper to insert branches to Cortex-A8 erratum stubs in the right
18669 places for a particular section. */
18670
18671static bfd_boolean
18672make_branch_to_a8_stub (struct bfd_hash_entry *gen_entry,
99059e56 18673 void *in_arg)
48229727
JB		 18674{
18675 struct elf32_arm_stub_hash_entry *stub_entry;
18676 struct a8_branch_to_stub_data *data;
18677 bfd_byte *contents;
18678 unsigned long branch_insn;
18679 bfd_vma veneered_insn_loc, veneer_entry_loc;
18680 bfd_signed_vma branch_offset;
18681 bfd *abfd;
8d9d9490 18682 unsigned int loc;
48229727
JB		 18683
18684 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
18685 data = (struct a8_branch_to_stub_data *) in_arg;
18686
18687 if (stub_entry->target_section != data->writing_section
4563a860 18688 || stub_entry->stub_type < arm_stub_a8_veneer_lwm)
48229727
JB		 18689 return TRUE;
18690
18691 contents = data->contents;
18692
8d9d9490
TP		 18693 /* We use target_section as Cortex-A8 erratum workaround stubs are only
18694 generated when both source and target are in the same section. */
48229727
JB		 18695 veneered_insn_loc = stub_entry->target_section->output_section->vma
18696 + stub_entry->target_section->output_offset
8d9d9490 18697 + stub_entry->source_value;
48229727
JB		 18698
18699 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
18700 + stub_entry->stub_sec->output_offset
18701 + stub_entry->stub_offset;
18702
18703 if (stub_entry->stub_type == arm_stub_a8_veneer_blx)
18704 veneered_insn_loc &= ~3u;
18705
18706 branch_offset = veneer_entry_loc - veneered_insn_loc - 4;
18707
18708 abfd = stub_entry->target_section->owner;
8d9d9490 18709 loc = stub_entry->source_value;
48229727
JB		 18710
18711 /* We attempt to avoid this condition by setting stubs_always_after_branch
18712 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
18713 This check is just to be on the safe side... */
18714 if ((veneered_insn_loc & ~0xfff) == (veneer_entry_loc & ~0xfff))
18715 {
871b3ab2 18716 _bfd_error_handler (_("%pB: error: Cortex-A8 erratum stub is "
4eca0228 18717 "allocated in unsafe location"), abfd);
48229727
JB		 18718 return FALSE;
18719 }
18720
18721 switch (stub_entry->stub_type)
18722 {
18723 case arm_stub_a8_veneer_b:
18724 case arm_stub_a8_veneer_b_cond:
18725 branch_insn = 0xf0009000;
18726 goto jump24;
18727
18728 case arm_stub_a8_veneer_blx:
18729 branch_insn = 0xf000e800;
18730 goto jump24;
18731
18732 case arm_stub_a8_veneer_bl:
18733 {
18734 unsigned int i1, j1, i2, j2, s;
18735
18736 branch_insn = 0xf000d000;
18737
18738 jump24:
18739 if (branch_offset < -16777216 || branch_offset > 16777214)
18740 {
18741 /* There's not much we can do apart from complain if this
18742 happens. */
871b3ab2 18743 _bfd_error_handler (_("%pB: error: Cortex-A8 erratum stub out "
4eca0228 18744 "of range (input file too large)"), abfd);
48229727
JB		 18745 return FALSE;
18746 }
18747
18748 /* i1 = not(j1 eor s), so:
18749 not i1 = j1 eor s
18750 j1 = (not i1) eor s. */
18751
18752 branch_insn |= (branch_offset >> 1) & 0x7ff;
18753 branch_insn |= ((branch_offset >> 12) & 0x3ff) << 16;
18754 i2 = (branch_offset >> 22) & 1;
18755 i1 = (branch_offset >> 23) & 1;
18756 s = (branch_offset >> 24) & 1;
18757 j1 = (!i1) ^ s;
18758 j2 = (!i2) ^ s;
18759 branch_insn |= j2 << 11;
18760 branch_insn |= j1 << 13;
18761 branch_insn |= s << 26;
18762 }
18763 break;
18764
18765 default:
18766 BFD_FAIL ();
18767 return FALSE;
18768 }
18769
8d9d9490
TP		 18770 bfd_put_16 (abfd, (branch_insn >> 16) & 0xffff, &contents[loc]);
18771 bfd_put_16 (abfd, branch_insn & 0xffff, &contents[loc + 2]);
48229727
JB		 18772
18773 return TRUE;
18774}
18775
a504d23a
LA		 18776/* Beginning of stm32l4xx work-around. */
18777
18778/* Functions encoding instructions necessary for the emission of the
18779 fix-stm32l4xx-629360.
18780 Encoding is extracted from the
18781 ARM (C) Architecture Reference Manual
18782 ARMv7-A and ARMv7-R edition
18783 ARM DDI 0406C.b (ID072512). */
18784
18785static inline bfd_vma
82188b29 18786create_instruction_branch_absolute (int branch_offset)
a504d23a
LA		 18787{
18788 /* A8.8.18 B (A8-334)
18789 B target_address (Encoding T4). */
18790 /* 1111 - 0Sii - iiii - iiii - 10J1 - Jiii - iiii - iiii. */
18791 /* jump offset is: S:I1:I2:imm10:imm11:0. */
18792 /* with : I1 = NOT (J1 EOR S) I2 = NOT (J2 EOR S). */
18793
a504d23a
LA		 18794 int s = ((branch_offset & 0x1000000) >> 24);
18795 int j1 = s ^ !((branch_offset & 0x800000) >> 23);
18796 int j2 = s ^ !((branch_offset & 0x400000) >> 22);
18797
18798 if (branch_offset < -(1 << 24) || branch_offset >= (1 << 24))
18799 BFD_ASSERT (0 && "Error: branch out of range. Cannot create branch.");
18800
18801 bfd_vma patched_inst = 0xf0009000
18802 | s << 26 /* S. */
18803 | (((unsigned long) (branch_offset) >> 12) & 0x3ff) << 16 /* imm10. */
18804 | j1 << 13 /* J1. */
18805 | j2 << 11 /* J2. */
18806 | (((unsigned long) (branch_offset) >> 1) & 0x7ff); /* imm11. */
18807
18808 return patched_inst;
18809}
18810
18811static inline bfd_vma
18812create_instruction_ldmia (int base_reg, int wback, int reg_mask)
18813{
18814 /* A8.8.57 LDM/LDMIA/LDMFD (A8-396)
18815 LDMIA Rn!, {Ra, Rb, Rc, ...} (Encoding T2). */
18816 bfd_vma patched_inst = 0xe8900000
18817 | (/*W=*/wback << 21)
18818 | (base_reg << 16)
18819 | (reg_mask & 0x0000ffff);
18820
18821 return patched_inst;
18822}
18823
18824static inline bfd_vma
18825create_instruction_ldmdb (int base_reg, int wback, int reg_mask)
18826{
18827 /* A8.8.60 LDMDB/LDMEA (A8-402)
18828 LDMDB Rn!, {Ra, Rb, Rc, ...} (Encoding T1). */
18829 bfd_vma patched_inst = 0xe9100000
18830 | (/*W=*/wback << 21)
18831 | (base_reg << 16)
18832 | (reg_mask & 0x0000ffff);
18833
18834 return patched_inst;
18835}
18836
18837static inline bfd_vma
18838create_instruction_mov (int target_reg, int source_reg)
18839{
18840 /* A8.8.103 MOV (register) (A8-486)
18841 MOV Rd, Rm (Encoding T1). */
18842 bfd_vma patched_inst = 0x4600
18843 | (target_reg & 0x7)
18844 | ((target_reg & 0x8) >> 3) << 7
18845 | (source_reg << 3);
18846
18847 return patched_inst;
18848}
18849
18850static inline bfd_vma
18851create_instruction_sub (int target_reg, int source_reg, int value)
18852{
18853 /* A8.8.221 SUB (immediate) (A8-708)
18854 SUB Rd, Rn, #value (Encoding T3). */
18855 bfd_vma patched_inst = 0xf1a00000
18856 | (target_reg << 8)
18857 | (source_reg << 16)
18858 | (/*S=*/0 << 20)
18859 | ((value & 0x800) >> 11) << 26
18860 | ((value & 0x700) >> 8) << 12
18861 | (value & 0x0ff);
18862
18863 return patched_inst;
18864}
18865
18866static inline bfd_vma
9239bbd3 18867create_instruction_vldmia (int base_reg, int is_dp, int wback, int num_words,
a504d23a
LA		 18868 int first_reg)
18869{
18870 /* A8.8.332 VLDM (A8-922)
9239bbd3
CM		 18871 VLMD{MODE} Rn{!}, {list} (Encoding T1 or T2). */
18872 bfd_vma patched_inst = (is_dp ? 0xec900b00 : 0xec900a00)
a504d23a
LA		 18873 | (/*W=*/wback << 21)
18874 | (base_reg << 16)
9239bbd3
CM		 18875 | (num_words & 0x000000ff)
18876 | (((unsigned)first_reg >> 1) & 0x0000000f) << 12
a504d23a
LA		 18877 | (first_reg & 0x00000001) << 22;
18878
18879 return patched_inst;
18880}
18881
18882static inline bfd_vma
9239bbd3
CM		 18883create_instruction_vldmdb (int base_reg, int is_dp, int num_words,
18884 int first_reg)
a504d23a
LA		 18885{
18886 /* A8.8.332 VLDM (A8-922)
9239bbd3
CM		 18887 VLMD{MODE} Rn!, {} (Encoding T1 or T2). */
18888 bfd_vma patched_inst = (is_dp ? 0xed300b00 : 0xed300a00)
a504d23a 18889 | (base_reg << 16)
9239bbd3
CM		 18890 | (num_words & 0x000000ff)
18891 | (((unsigned)first_reg >>1 ) & 0x0000000f) << 12
a504d23a
LA		 18892 | (first_reg & 0x00000001) << 22;
18893
18894 return patched_inst;
18895}
18896
18897static inline bfd_vma
18898create_instruction_udf_w (int value)
18899{
18900 /* A8.8.247 UDF (A8-758)
18901 Undefined (Encoding T2). */
18902 bfd_vma patched_inst = 0xf7f0a000
18903 | (value & 0x00000fff)
18904 | (value & 0x000f0000) << 16;
18905
18906 return patched_inst;
18907}
18908
18909static inline bfd_vma
18910create_instruction_udf (int value)
18911{
18912 /* A8.8.247 UDF (A8-758)
18913 Undefined (Encoding T1). */
18914 bfd_vma patched_inst = 0xde00
18915 | (value & 0xff);
18916
18917 return patched_inst;
18918}
18919
18920/* Functions writing an instruction in memory, returning the next
18921 memory position to write to. */
18922
18923static inline bfd_byte *
18924push_thumb2_insn32 (struct elf32_arm_link_hash_table * htab,
18925 bfd * output_bfd, bfd_byte *pt, insn32 insn)
18926{
18927 put_thumb2_insn (htab, output_bfd, insn, pt);
18928 return pt + 4;
18929}
18930
18931static inline bfd_byte *
18932push_thumb2_insn16 (struct elf32_arm_link_hash_table * htab,
18933 bfd * output_bfd, bfd_byte *pt, insn32 insn)
18934{
18935 put_thumb_insn (htab, output_bfd, insn, pt);
18936 return pt + 2;
18937}
18938
18939/* Function filling up a region in memory with T1 and T2 UDFs taking
18940 care of alignment. */
18941
18942static bfd_byte *
18943stm32l4xx_fill_stub_udf (struct elf32_arm_link_hash_table * htab,
07d6d2b8
AM		 18944 bfd * output_bfd,
18945 const bfd_byte * const base_stub_contents,
18946 bfd_byte * const from_stub_contents,
18947 const bfd_byte * const end_stub_contents)
a504d23a
LA		 18948{
18949 bfd_byte *current_stub_contents = from_stub_contents;
18950
18951 /* Fill the remaining of the stub with deterministic contents : UDF
18952 instructions.
18953 Check if realignment is needed on modulo 4 frontier using T1, to
18954 further use T2. */
18955 if ((current_stub_contents < end_stub_contents)
18956 && !((current_stub_contents - base_stub_contents) % 2)
18957 && ((current_stub_contents - base_stub_contents) % 4))
18958 current_stub_contents =
18959 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
18960 create_instruction_udf (0));
18961
18962 for (; current_stub_contents < end_stub_contents;)
18963 current_stub_contents =
18964 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
18965 create_instruction_udf_w (0));
18966
18967 return current_stub_contents;
18968}
18969
18970/* Functions writing the stream of instructions equivalent to the
18971 derived sequence for ldmia, ldmdb, vldm respectively. */
18972
18973static void
18974stm32l4xx_create_replacing_stub_ldmia (struct elf32_arm_link_hash_table * htab,
18975 bfd * output_bfd,
18976 const insn32 initial_insn,
18977 const bfd_byte *const initial_insn_addr,
18978 bfd_byte *const base_stub_contents)
18979{
18980 int wback = (initial_insn & 0x00200000) >> 21;
18981 int ri, rn = (initial_insn & 0x000F0000) >> 16;
18982 int insn_all_registers = initial_insn & 0x0000ffff;
18983 int insn_low_registers, insn_high_registers;
18984 int usable_register_mask;
b25e998d 18985 int nb_registers = elf32_arm_popcount (insn_all_registers);
a504d23a
LA		 18986 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
18987 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
18988 bfd_byte *current_stub_contents = base_stub_contents;
18989
18990 BFD_ASSERT (is_thumb2_ldmia (initial_insn));
18991
18992 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
18993 smaller than 8 registers load sequences that do not cause the
18994 hardware issue. */
18995 if (nb_registers <= 8)
18996 {
18997 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
18998 current_stub_contents =
18999 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19000 initial_insn);
19001
19002 /* B initial_insn_addr+4. */
19003 if (!restore_pc)
19004 current_stub_contents =
19005 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19006 create_instruction_branch_absolute
82188b29 19007 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19008
19009 /* Fill the remaining of the stub with deterministic contents. */
19010 current_stub_contents =
19011 stm32l4xx_fill_stub_udf (htab, output_bfd,
19012 base_stub_contents, current_stub_contents,
19013 base_stub_contents +
19014 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
19015
19016 return;
19017 }
19018
19019 /* - reg_list[13] == 0. */
19020 BFD_ASSERT ((insn_all_registers & (1 << 13))==0);
19021
19022 /* - reg_list[14] & reg_list[15] != 1. */
19023 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
19024
19025 /* - if (wback==1) reg_list[rn] == 0. */
19026 BFD_ASSERT (!wback || !restore_rn);
19027
19028 /* - nb_registers > 8. */
b25e998d 19029 BFD_ASSERT (elf32_arm_popcount (insn_all_registers) > 8);
a504d23a
LA		 19030
19031 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
19032
19033 /* In the following algorithm, we split this wide LDM using 2 LDM insns:
19034 - One with the 7 lowest registers (register mask 0x007F)
19035 This LDM will finally contain between 2 and 7 registers
19036 - One with the 7 highest registers (register mask 0xDF80)
19037 This ldm will finally contain between 2 and 7 registers. */
19038 insn_low_registers = insn_all_registers & 0x007F;
19039 insn_high_registers = insn_all_registers & 0xDF80;
19040
19041 /* A spare register may be needed during this veneer to temporarily
19042 handle the base register. This register will be restored with the
19043 last LDM operation.
19044 The usable register may be any general purpose register (that
19045 excludes PC, SP, LR : register mask is 0x1FFF). */
19046 usable_register_mask = 0x1FFF;
19047
19048 /* Generate the stub function. */
19049 if (wback)
19050 {
19051 /* LDMIA Rn!, {R-low-register-list} : (Encoding T2). */
19052 current_stub_contents =
19053 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19054 create_instruction_ldmia
19055 (rn, /*wback=*/1, insn_low_registers));
19056
19057 /* LDMIA Rn!, {R-high-register-list} : (Encoding T2). */
19058 current_stub_contents =
19059 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19060 create_instruction_ldmia
19061 (rn, /*wback=*/1, insn_high_registers));
19062 if (!restore_pc)
19063 {
19064 /* B initial_insn_addr+4. */
19065 current_stub_contents =
19066 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19067 create_instruction_branch_absolute
82188b29 19068 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19069 }
19070 }
19071 else /* if (!wback). */
19072 {
19073 ri = rn;
19074
19075 /* If Rn is not part of the high-register-list, move it there. */
19076 if (!(insn_high_registers & (1 << rn)))
19077 {
19078 /* Choose a Ri in the high-register-list that will be restored. */
19079 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
19080
19081 /* MOV Ri, Rn. */
19082 current_stub_contents =
19083 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
19084 create_instruction_mov (ri, rn));
19085 }
19086
19087 /* LDMIA Ri!, {R-low-register-list} : (Encoding T2). */
19088 current_stub_contents =
19089 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19090 create_instruction_ldmia
19091 (ri, /*wback=*/1, insn_low_registers));
19092
19093 /* LDMIA Ri, {R-high-register-list} : (Encoding T2). */
19094 current_stub_contents =
19095 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19096 create_instruction_ldmia
19097 (ri, /*wback=*/0, insn_high_registers));
19098
19099 if (!restore_pc)
19100 {
19101 /* B initial_insn_addr+4. */
19102 current_stub_contents =
19103 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19104 create_instruction_branch_absolute
82188b29 19105 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19106 }
19107 }
19108
19109 /* Fill the remaining of the stub with deterministic contents. */
19110 current_stub_contents =
19111 stm32l4xx_fill_stub_udf (htab, output_bfd,
19112 base_stub_contents, current_stub_contents,
19113 base_stub_contents +
19114 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
19115}
19116
19117static void
19118stm32l4xx_create_replacing_stub_ldmdb (struct elf32_arm_link_hash_table * htab,
19119 bfd * output_bfd,
19120 const insn32 initial_insn,
19121 const bfd_byte *const initial_insn_addr,
19122 bfd_byte *const base_stub_contents)
19123{
19124 int wback = (initial_insn & 0x00200000) >> 21;
19125 int ri, rn = (initial_insn & 0x000f0000) >> 16;
19126 int insn_all_registers = initial_insn & 0x0000ffff;
19127 int insn_low_registers, insn_high_registers;
19128 int usable_register_mask;
19129 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
19130 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
b25e998d 19131 int nb_registers = elf32_arm_popcount (insn_all_registers);
a504d23a
LA		 19132 bfd_byte *current_stub_contents = base_stub_contents;
19133
19134 BFD_ASSERT (is_thumb2_ldmdb (initial_insn));
19135
19136 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
19137 smaller than 8 registers load sequences that do not cause the
19138 hardware issue. */
19139 if (nb_registers <= 8)
19140 {
19141 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
19142 current_stub_contents =
19143 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19144 initial_insn);
19145
19146 /* B initial_insn_addr+4. */
19147 current_stub_contents =
19148 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19149 create_instruction_branch_absolute
82188b29 19150 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19151
19152 /* Fill the remaining of the stub with deterministic contents. */
19153 current_stub_contents =
19154 stm32l4xx_fill_stub_udf (htab, output_bfd,
19155 base_stub_contents, current_stub_contents,
19156 base_stub_contents +
19157 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
19158
19159 return;
19160 }
19161
19162 /* - reg_list[13] == 0. */
19163 BFD_ASSERT ((insn_all_registers & (1 << 13)) == 0);
19164
19165 /* - reg_list[14] & reg_list[15] != 1. */
19166 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
19167
19168 /* - if (wback==1) reg_list[rn] == 0. */
19169 BFD_ASSERT (!wback || !restore_rn);
19170
19171 /* - nb_registers > 8. */
b25e998d 19172 BFD_ASSERT (elf32_arm_popcount (insn_all_registers) > 8);
a504d23a
LA		 19173
19174 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
19175
19176 /* In the following algorithm, we split this wide LDM using 2 LDM insn:
19177 - One with the 7 lowest registers (register mask 0x007F)
19178 This LDM will finally contain between 2 and 7 registers
19179 - One with the 7 highest registers (register mask 0xDF80)
19180 This ldm will finally contain between 2 and 7 registers. */
19181 insn_low_registers = insn_all_registers & 0x007F;
19182 insn_high_registers = insn_all_registers & 0xDF80;
19183
19184 /* A spare register may be needed during this veneer to temporarily
19185 handle the base register. This register will be restored with
19186 the last LDM operation.
19187 The usable register may be any general purpose register (that excludes
19188 PC, SP, LR : register mask is 0x1FFF). */
19189 usable_register_mask = 0x1FFF;
19190
19191 /* Generate the stub function. */
19192 if (!wback && !restore_pc && !restore_rn)
19193 {
19194 /* Choose a Ri in the low-register-list that will be restored. */
19195 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
19196
19197 /* MOV Ri, Rn. */
19198 current_stub_contents =
19199 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
19200 create_instruction_mov (ri, rn));
19201
19202 /* LDMDB Ri!, {R-high-register-list}. */
19203 current_stub_contents =
19204 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19205 create_instruction_ldmdb
19206 (ri, /*wback=*/1, insn_high_registers));
19207
19208 /* LDMDB Ri, {R-low-register-list}. */
19209 current_stub_contents =
19210 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19211 create_instruction_ldmdb
19212 (ri, /*wback=*/0, insn_low_registers));
19213
19214 /* B initial_insn_addr+4. */
19215 current_stub_contents =
19216 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19217 create_instruction_branch_absolute
82188b29 19218 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19219 }
19220 else if (wback && !restore_pc && !restore_rn)
19221 {
19222 /* LDMDB Rn!, {R-high-register-list}. */
19223 current_stub_contents =
19224 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19225 create_instruction_ldmdb
19226 (rn, /*wback=*/1, insn_high_registers));
19227
19228 /* LDMDB Rn!, {R-low-register-list}. */
19229 current_stub_contents =
19230 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19231 create_instruction_ldmdb
19232 (rn, /*wback=*/1, insn_low_registers));
19233
19234 /* B initial_insn_addr+4. */
19235 current_stub_contents =
19236 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19237 create_instruction_branch_absolute
82188b29 19238 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19239 }
19240 else if (!wback && restore_pc && !restore_rn)
19241 {
19242 /* Choose a Ri in the high-register-list that will be restored. */
19243 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
19244
19245 /* SUB Ri, Rn, #(4*nb_registers). */
19246 current_stub_contents =
19247 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19248 create_instruction_sub (ri, rn, (4 * nb_registers)));
19249
19250 /* LDMIA Ri!, {R-low-register-list}. */
19251 current_stub_contents =
19252 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19253 create_instruction_ldmia
19254 (ri, /*wback=*/1, insn_low_registers));
19255
19256 /* LDMIA Ri, {R-high-register-list}. */
19257 current_stub_contents =
19258 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19259 create_instruction_ldmia
19260 (ri, /*wback=*/0, insn_high_registers));
19261 }
19262 else if (wback && restore_pc && !restore_rn)
19263 {
19264 /* Choose a Ri in the high-register-list that will be restored. */
19265 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
19266
19267 /* SUB Rn, Rn, #(4*nb_registers) */
19268 current_stub_contents =
19269 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19270 create_instruction_sub (rn, rn, (4 * nb_registers)));
19271
19272 /* MOV Ri, Rn. */
19273 current_stub_contents =
19274 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
19275 create_instruction_mov (ri, rn));
19276
19277 /* LDMIA Ri!, {R-low-register-list}. */
19278 current_stub_contents =
19279 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19280 create_instruction_ldmia
19281 (ri, /*wback=*/1, insn_low_registers));
19282
19283 /* LDMIA Ri, {R-high-register-list}. */
19284 current_stub_contents =
19285 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19286 create_instruction_ldmia
19287 (ri, /*wback=*/0, insn_high_registers));
19288 }
19289 else if (!wback && !restore_pc && restore_rn)
19290 {
19291 ri = rn;
19292 if (!(insn_low_registers & (1 << rn)))
19293 {
19294 /* Choose a Ri in the low-register-list that will be restored. */
19295 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
19296
19297 /* MOV Ri, Rn. */
19298 current_stub_contents =
19299 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
19300 create_instruction_mov (ri, rn));
19301 }
19302
19303 /* LDMDB Ri!, {R-high-register-list}. */
19304 current_stub_contents =
19305 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19306 create_instruction_ldmdb
19307 (ri, /*wback=*/1, insn_high_registers));
19308
19309 /* LDMDB Ri, {R-low-register-list}. */
19310 current_stub_contents =
19311 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19312 create_instruction_ldmdb
19313 (ri, /*wback=*/0, insn_low_registers));
19314
19315 /* B initial_insn_addr+4. */
19316 current_stub_contents =
19317 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19318 create_instruction_branch_absolute
82188b29 19319 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19320 }
19321 else if (!wback && restore_pc && restore_rn)
19322 {
19323 ri = rn;
19324 if (!(insn_high_registers & (1 << rn)))
19325 {
19326 /* Choose a Ri in the high-register-list that will be restored. */
19327 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
19328 }
19329
19330 /* SUB Ri, Rn, #(4*nb_registers). */
19331 current_stub_contents =
19332 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19333 create_instruction_sub (ri, rn, (4 * nb_registers)));
19334
19335 /* LDMIA Ri!, {R-low-register-list}. */
19336 current_stub_contents =
19337 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19338 create_instruction_ldmia
19339 (ri, /*wback=*/1, insn_low_registers));
19340
19341 /* LDMIA Ri, {R-high-register-list}. */
19342 current_stub_contents =
19343 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19344 create_instruction_ldmia
19345 (ri, /*wback=*/0, insn_high_registers));
19346 }
19347 else if (wback && restore_rn)
19348 {
19349 /* The assembler should not have accepted to encode this. */
19350 BFD_ASSERT (0 && "Cannot patch an instruction that has an "
19351 "undefined behavior.\n");
19352 }
19353
19354 /* Fill the remaining of the stub with deterministic contents. */
19355 current_stub_contents =
19356 stm32l4xx_fill_stub_udf (htab, output_bfd,
19357 base_stub_contents, current_stub_contents,
19358 base_stub_contents +
19359 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
19360
19361}
19362
19363static void
19364stm32l4xx_create_replacing_stub_vldm (struct elf32_arm_link_hash_table * htab,
19365 bfd * output_bfd,
19366 const insn32 initial_insn,
19367 const bfd_byte *const initial_insn_addr,
19368 bfd_byte *const base_stub_contents)
19369{
13c9c485 19370 int num_words = initial_insn & 0xff;
a504d23a
LA		 19371 bfd_byte *current_stub_contents = base_stub_contents;
19372
19373 BFD_ASSERT (is_thumb2_vldm (initial_insn));
19374
19375 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
9239bbd3 19376 smaller than 8 words load sequences that do not cause the
a504d23a 19377 hardware issue. */
9239bbd3 19378 if (num_words <= 8)
a504d23a
LA		 19379 {
19380 /* Untouched instruction. */
19381 current_stub_contents =
19382 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19383 initial_insn);
19384
19385 /* B initial_insn_addr+4. */
19386 current_stub_contents =
19387 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19388 create_instruction_branch_absolute
82188b29 19389 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19390 }
19391 else
19392 {
9eaff861 19393 bfd_boolean is_dp = /* DP encoding. */
9239bbd3 19394 (initial_insn & 0xfe100f00) == 0xec100b00;
a504d23a
LA		 19395 bfd_boolean is_ia_nobang = /* (IA without !). */
19396 (((initial_insn << 7) >> 28) & 0xd) == 0x4;
19397 bfd_boolean is_ia_bang = /* (IA with !) - includes VPOP. */
19398 (((initial_insn << 7) >> 28) & 0xd) == 0x5;
19399 bfd_boolean is_db_bang = /* (DB with !). */
19400 (((initial_insn << 7) >> 28) & 0xd) == 0x9;
9239bbd3 19401 int base_reg = ((unsigned int) initial_insn << 12) >> 28;
a504d23a 19402 /* d = UInt (Vd:D);. */
9239bbd3 19403 int first_reg = ((((unsigned int) initial_insn << 16) >> 28) << 1)
a504d23a
LA		 19404 | (((unsigned int)initial_insn << 9) >> 31);
19405
9239bbd3
CM		 19406 /* Compute the number of 8-words chunks needed to split. */
19407 int chunks = (num_words % 8) ? (num_words / 8 + 1) : (num_words / 8);
a504d23a
LA		 19408 int chunk;
19409
19410 /* The test coverage has been done assuming the following
19411 hypothesis that exactly one of the previous is_ predicates is
19412 true. */
9239bbd3
CM		 19413 BFD_ASSERT ( (is_ia_nobang ^ is_ia_bang ^ is_db_bang)
19414 && !(is_ia_nobang & is_ia_bang & is_db_bang));
a504d23a 19415
9239bbd3 19416 /* We treat the cutting of the words in one pass for all
a504d23a
LA		 19417 cases, then we emit the adjustments:
19418
19419 vldm rx, {...}
19420 -> vldm rx!, {8_words_or_less} for each needed 8_word
19421 -> sub rx, rx, #size (list)
19422
19423 vldm rx!, {...}
19424 -> vldm rx!, {8_words_or_less} for each needed 8_word
19425 This also handles vpop instruction (when rx is sp)
19426
19427 vldmd rx!, {...}
19428 -> vldmb rx!, {8_words_or_less} for each needed 8_word. */
9239bbd3 19429 for (chunk = 0; chunk < chunks; ++chunk)
a504d23a 19430 {
9239bbd3
CM		 19431 bfd_vma new_insn = 0;
19432
a504d23a
LA		 19433 if (is_ia_nobang || is_ia_bang)
19434 {
9239bbd3
CM		 19435 new_insn = create_instruction_vldmia
19436 (base_reg,
19437 is_dp,
19438 /*wback= . */1,
19439 chunks - (chunk + 1) ?
19440 8 : num_words - chunk * 8,
19441 first_reg + chunk * 8);
a504d23a
LA		 19442 }
19443 else if (is_db_bang)
19444 {
9239bbd3
CM		 19445 new_insn = create_instruction_vldmdb
19446 (base_reg,
19447 is_dp,
19448 chunks - (chunk + 1) ?
19449 8 : num_words - chunk * 8,
19450 first_reg + chunk * 8);
a504d23a 19451 }
9239bbd3
CM		 19452
19453 if (new_insn)
19454 current_stub_contents =
19455 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19456 new_insn);
a504d23a
LA		 19457 }
19458
19459 /* Only this case requires the base register compensation
19460 subtract. */
19461 if (is_ia_nobang)
19462 {
19463 current_stub_contents =
19464 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19465 create_instruction_sub
9239bbd3 19466 (base_reg, base_reg, 4*num_words));
a504d23a
LA		 19467 }
19468
19469 /* B initial_insn_addr+4. */
19470 current_stub_contents =
19471 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
19472 create_instruction_branch_absolute
82188b29 19473 (initial_insn_addr - current_stub_contents));
a504d23a
LA		 19474 }
19475
19476 /* Fill the remaining of the stub with deterministic contents. */
19477 current_stub_contents =
19478 stm32l4xx_fill_stub_udf (htab, output_bfd,
19479 base_stub_contents, current_stub_contents,
19480 base_stub_contents +
19481 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
19482}
19483
19484static void
19485stm32l4xx_create_replacing_stub (struct elf32_arm_link_hash_table * htab,
19486 bfd * output_bfd,
19487 const insn32 wrong_insn,
19488 const bfd_byte *const wrong_insn_addr,
19489 bfd_byte *const stub_contents)
19490{
19491 if (is_thumb2_ldmia (wrong_insn))
19492 stm32l4xx_create_replacing_stub_ldmia (htab, output_bfd,
19493 wrong_insn, wrong_insn_addr,
19494 stub_contents);
19495 else if (is_thumb2_ldmdb (wrong_insn))
19496 stm32l4xx_create_replacing_stub_ldmdb (htab, output_bfd,
19497 wrong_insn, wrong_insn_addr,
19498 stub_contents);
19499 else if (is_thumb2_vldm (wrong_insn))
19500 stm32l4xx_create_replacing_stub_vldm (htab, output_bfd,
19501 wrong_insn, wrong_insn_addr,
19502 stub_contents);
19503}
19504
19505/* End of stm32l4xx work-around. */
19506
19507
e489d0ae
PB		 19508/* Do code byteswapping. Return FALSE afterwards so that the section is
19509 written out as normal. */
19510
19511static bfd_boolean
c7b8f16e 19512elf32_arm_write_section (bfd *output_bfd,
8029a119
NC		 19513 struct bfd_link_info *link_info,
19514 asection *sec,
e489d0ae
PB		 19515 bfd_byte *contents)
19516{
48229727 19517 unsigned int mapcount, errcount;
8e3de13a 19518 _arm_elf_section_data *arm_data;
c7b8f16e 19519 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
e489d0ae 19520 elf32_arm_section_map *map;
c7b8f16e 19521 elf32_vfp11_erratum_list *errnode;
a504d23a 19522 elf32_stm32l4xx_erratum_list *stm32l4xx_errnode;
e489d0ae
PB		 19523 bfd_vma ptr;
19524 bfd_vma end;
c7b8f16e 19525 bfd_vma offset = sec->output_section->vma + sec->output_offset;
e489d0ae 19526 bfd_byte tmp;
48229727 19527 unsigned int i;
57e8b36a 19528
4dfe6ac6
NC		 19529 if (globals == NULL)
19530 return FALSE;
19531
8e3de13a
NC		 19532 /* If this section has not been allocated an _arm_elf_section_data
19533 structure then we cannot record anything. */
19534 arm_data = get_arm_elf_section_data (sec);
19535 if (arm_data == NULL)
19536 return FALSE;
19537
19538 mapcount = arm_data->mapcount;
19539 map = arm_data->map;
c7b8f16e
JB		 19540 errcount = arm_data->erratumcount;
19541
19542 if (errcount != 0)
19543 {
19544 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
19545
19546 for (errnode = arm_data->erratumlist; errnode != 0;
99059e56
RM		 19547 errnode = errnode->next)
19548 {
19549 bfd_vma target = errnode->vma - offset;
19550
19551 switch (errnode->type)
19552 {
19553 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
19554 {
19555 bfd_vma branch_to_veneer;
19556 /* Original condition code of instruction, plus bit mask for
19557 ARM B instruction. */
19558 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
19559 | 0x0a000000;
c7b8f16e
JB		 19560
19561 /* The instruction is before the label. */
91d6fa6a 19562 target -= 4;
c7b8f16e
JB		 19563
19564 /* Above offset included in -4 below. */
19565 branch_to_veneer = errnode->u.b.veneer->vma
99059e56 19566 - errnode->vma - 4;
c7b8f16e
JB		 19567
19568 if ((signed) branch_to_veneer < -(1 << 25)
19569 || (signed) branch_to_veneer >= (1 << 25))
871b3ab2 19570 _bfd_error_handler (_("%pB: error: VFP11 veneer out of "
4eca0228 19571 "range"), output_bfd);
c7b8f16e 19572
99059e56
RM		 19573 insn |= (branch_to_veneer >> 2) & 0xffffff;
19574 contents[endianflip ^ target] = insn & 0xff;
19575 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
19576 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
19577 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
19578 }
19579 break;
c7b8f16e
JB		 19580
19581 case VFP11_ERRATUM_ARM_VENEER:
99059e56
RM		 19582 {
19583 bfd_vma branch_from_veneer;
19584 unsigned int insn;
c7b8f16e 19585
99059e56
RM		 19586 /* Take size of veneer into account. */
19587 branch_from_veneer = errnode->u.v.branch->vma
19588 - errnode->vma - 12;
c7b8f16e
JB		 19589
19590 if ((signed) branch_from_veneer < -(1 << 25)
19591 || (signed) branch_from_veneer >= (1 << 25))
871b3ab2 19592 _bfd_error_handler (_("%pB: error: VFP11 veneer out of "
4eca0228 19593 "range"), output_bfd);
c7b8f16e 19594
99059e56
RM		 19595 /* Original instruction. */
19596 insn = errnode->u.v.branch->u.b.vfp_insn;
19597 contents[endianflip ^ target] = insn & 0xff;
19598 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
19599 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
19600 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
19601
19602 /* Branch back to insn after original insn. */
19603 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
19604 contents[endianflip ^ (target + 4)] = insn & 0xff;
19605 contents[endianflip ^ (target + 5)] = (insn >> 8) & 0xff;
19606 contents[endianflip ^ (target + 6)] = (insn >> 16) & 0xff;
19607 contents[endianflip ^ (target + 7)] = (insn >> 24) & 0xff;
19608 }
19609 break;
c7b8f16e 19610
99059e56
RM		 19611 default:
19612 abort ();
19613 }
19614 }
c7b8f16e 19615 }
e489d0ae 19616
a504d23a
LA		 19617 if (arm_data->stm32l4xx_erratumcount != 0)
19618 {
19619 for (stm32l4xx_errnode = arm_data->stm32l4xx_erratumlist;
19620 stm32l4xx_errnode != 0;
19621 stm32l4xx_errnode = stm32l4xx_errnode->next)
19622 {
19623 bfd_vma target = stm32l4xx_errnode->vma - offset;
19624
19625 switch (stm32l4xx_errnode->type)
19626 {
19627 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
19628 {
19629 unsigned int insn;
19630 bfd_vma branch_to_veneer =
19631 stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma;
19632
19633 if ((signed) branch_to_veneer < -(1 << 24)
19634 || (signed) branch_to_veneer >= (1 << 24))
19635 {
19636 bfd_vma out_of_range =
19637 ((signed) branch_to_veneer < -(1 << 24)) ?
19638 - branch_to_veneer - (1 << 24) :
19639 ((signed) branch_to_veneer >= (1 << 24)) ?
19640 branch_to_veneer - (1 << 24) : 0;
19641
4eca0228 19642 _bfd_error_handler
2dcf00ce 19643 (_("%pB(%#" PRIx64 "): error: "
90b6238f
AM		 19644 "cannot create STM32L4XX veneer; "
19645 "jump out of range by %" PRId64 " bytes; "
19646 "cannot encode branch instruction"),
a504d23a 19647 output_bfd,
2dcf00ce
AM		 19648 (uint64_t) (stm32l4xx_errnode->vma - 4),
19649 (int64_t) out_of_range);
a504d23a
LA		 19650 continue;
19651 }
19652
19653 insn = create_instruction_branch_absolute
82188b29 19654 (stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma);
a504d23a 19655
a2699ef2
AM		 19656 /* The instruction is before the label. */
19657 target -= 4;
19658
a504d23a
LA		 19659 put_thumb2_insn (globals, output_bfd,
19660 (bfd_vma) insn, contents + target);
19661 }
19662 break;
19663
19664 case STM32L4XX_ERRATUM_VENEER:
19665 {
82188b29
NC		 19666 bfd_byte * veneer;
19667 bfd_byte * veneer_r;
a504d23a
LA		 19668 unsigned int insn;
19669
82188b29
NC		 19670 veneer = contents + target;
19671 veneer_r = veneer
19672 + stm32l4xx_errnode->u.b.veneer->vma
19673 - stm32l4xx_errnode->vma - 4;
a504d23a
LA		 19674
19675 if ((signed) (veneer_r - veneer -
19676 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE >
19677 STM32L4XX_ERRATUM_LDM_VENEER_SIZE ?
19678 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE :
19679 STM32L4XX_ERRATUM_LDM_VENEER_SIZE) < -(1 << 24)
19680 || (signed) (veneer_r - veneer) >= (1 << 24))
19681 {
90b6238f
AM		 19682 _bfd_error_handler (_("%pB: error: cannot create STM32L4XX "
19683 "veneer"), output_bfd);
a504d23a
LA		 19684 continue;
19685 }
19686
19687 /* Original instruction. */
19688 insn = stm32l4xx_errnode->u.v.branch->u.b.insn;
19689
19690 stm32l4xx_create_replacing_stub
19691 (globals, output_bfd, insn, (void*)veneer_r, (void*)veneer);
19692 }
19693 break;
19694
19695 default:
19696 abort ();
19697 }
19698 }
19699 }
19700
2468f9c9
PB		 19701 if (arm_data->elf.this_hdr.sh_type == SHT_ARM_EXIDX)
19702 {
19703 arm_unwind_table_edit *edit_node
99059e56 19704 = arm_data->u.exidx.unwind_edit_list;
2468f9c9 19705 /* Now, sec->size is the size of the section we will write. The original
99059e56 19706 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
2468f9c9
PB		 19707 markers) was sec->rawsize. (This isn't the case if we perform no
19708 edits, then rawsize will be zero and we should use size). */
21d799b5 19709 bfd_byte *edited_contents = (bfd_byte *) bfd_malloc (sec->size);
2468f9c9
PB		 19710 unsigned int input_size = sec->rawsize ? sec->rawsize : sec->size;
19711 unsigned int in_index, out_index;
19712 bfd_vma add_to_offsets = 0;
19713
7a0fb7be
NC		 19714 if (edited_contents == NULL)
19715 return FALSE;
2468f9c9 19716 for (in_index = 0, out_index = 0; in_index * 8 < input_size || edit_node;)
99059e56 19717 {
2468f9c9
PB		 19718 if (edit_node)
19719 {
19720 unsigned int edit_index = edit_node->index;
b38cadfb 19721
2468f9c9 19722 if (in_index < edit_index && in_index * 8 < input_size)
99059e56 19723 {
2468f9c9
PB		 19724 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
19725 contents + in_index * 8, add_to_offsets);
19726 out_index++;
19727 in_index++;
19728 }
19729 else if (in_index == edit_index
19730 || (in_index * 8 >= input_size
19731 && edit_index == UINT_MAX))
99059e56 19732 {
2468f9c9
PB		 19733 switch (edit_node->type)
19734 {
19735 case DELETE_EXIDX_ENTRY:
19736 in_index++;
19737 add_to_offsets += 8;
19738 break;
b38cadfb 19739
2468f9c9
PB		 19740 case INSERT_EXIDX_CANTUNWIND_AT_END:
19741 {
99059e56 19742 asection *text_sec = edit_node->linked_section;
2468f9c9
PB		 19743 bfd_vma text_offset = text_sec->output_section->vma
19744 + text_sec->output_offset
19745 + text_sec->size;
19746 bfd_vma exidx_offset = offset + out_index * 8;
99059e56 19747 unsigned long prel31_offset;
2468f9c9
PB		 19748
19749 /* Note: this is meant to be equivalent to an
19750 R_ARM_PREL31 relocation. These synthetic
19751 EXIDX_CANTUNWIND markers are not relocated by the
19752 usual BFD method. */
19753 prel31_offset = (text_offset - exidx_offset)
19754 & 0x7ffffffful;
491d01d3
YU		 19755 if (bfd_link_relocatable (link_info))
19756 {
19757 /* Here relocation for new EXIDX_CANTUNWIND is
19758 created, so there is no need to
19759 adjust offset by hand. */
19760 prel31_offset = text_sec->output_offset
19761 + text_sec->size;
491d01d3 19762 }
2468f9c9
PB		 19763
19764 /* First address we can't unwind. */
19765 bfd_put_32 (output_bfd, prel31_offset,
19766 &edited_contents[out_index * 8]);
19767
19768 /* Code for EXIDX_CANTUNWIND. */
19769 bfd_put_32 (output_bfd, 0x1,
19770 &edited_contents[out_index * 8 + 4]);
19771
19772 out_index++;
19773 add_to_offsets -= 8;
19774 }
19775 break;
19776 }
b38cadfb 19777
2468f9c9
PB		 19778 edit_node = edit_node->next;
19779 }
19780 }
19781 else
19782 {
19783 /* No more edits, copy remaining entries verbatim. */
19784 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
19785 contents + in_index * 8, add_to_offsets);
19786 out_index++;
19787 in_index++;
19788 }
19789 }
19790
19791 if (!(sec->flags & SEC_EXCLUDE) && !(sec->flags & SEC_NEVER_LOAD))
19792 bfd_set_section_contents (output_bfd, sec->output_section,
19793 edited_contents,
19794 (file_ptr) sec->output_offset, sec->size);
19795
19796 return TRUE;
19797 }
19798
48229727
JB		 19799 /* Fix code to point to Cortex-A8 erratum stubs. */
19800 if (globals->fix_cortex_a8)
19801 {
19802 struct a8_branch_to_stub_data data;
19803
19804 data.writing_section = sec;
19805 data.contents = contents;
19806
a504d23a
LA		 19807 bfd_hash_traverse (& globals->stub_hash_table, make_branch_to_a8_stub,
19808 & data);
48229727
JB		 19809 }
19810
e489d0ae
PB		 19811 if (mapcount == 0)
19812 return FALSE;
19813
c7b8f16e 19814 if (globals->byteswap_code)
e489d0ae 19815 {
c7b8f16e 19816 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
57e8b36a 19817
c7b8f16e
JB		 19818 ptr = map[0].vma;
19819 for (i = 0; i < mapcount; i++)
99059e56
RM		 19820 {
19821 if (i == mapcount - 1)
c7b8f16e 19822 end = sec->size;
99059e56
RM		 19823 else
19824 end = map[i + 1].vma;
e489d0ae 19825
99059e56 19826 switch (map[i].type)
e489d0ae 19827 {
c7b8f16e
JB		 19828 case 'a':
19829 /* Byte swap code words. */
19830 while (ptr + 3 < end)
99059e56
RM		 19831 {
19832 tmp = contents[ptr];
19833 contents[ptr] = contents[ptr + 3];
19834 contents[ptr + 3] = tmp;
19835 tmp = contents[ptr + 1];
19836 contents[ptr + 1] = contents[ptr + 2];
19837 contents[ptr + 2] = tmp;
19838 ptr += 4;
19839 }
c7b8f16e 19840 break;
e489d0ae 19841
c7b8f16e
JB		 19842 case 't':
19843 /* Byte swap code halfwords. */
19844 while (ptr + 1 < end)
99059e56
RM		 19845 {
19846 tmp = contents[ptr];
19847 contents[ptr] = contents[ptr + 1];
19848 contents[ptr + 1] = tmp;
19849 ptr += 2;
19850 }
c7b8f16e
JB		 19851 break;
19852
19853 case 'd':
19854 /* Leave data alone. */
19855 break;
19856 }
99059e56
RM		 19857 ptr = end;
19858 }
e489d0ae 19859 }
8e3de13a 19860
93204d3a 19861 free (map);
47b2e99c 19862 arm_data->mapcount = -1;
c7b8f16e 19863 arm_data->mapsize = 0;
8e3de13a 19864 arm_data->map = NULL;
8e3de13a 19865
e489d0ae
PB		 19866 return FALSE;
19867}
19868
0beaef2b
PB		 19869/* Mangle thumb function symbols as we read them in. */
19870
8384fb8f 19871static bfd_boolean
0beaef2b
PB		 19872elf32_arm_swap_symbol_in (bfd * abfd,
19873 const void *psrc,
19874 const void *pshn,
19875 Elf_Internal_Sym *dst)
19876{
8384fb8f
AM		 19877 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
19878 return FALSE;
39d911fc 19879 dst->st_target_internal = 0;
0beaef2b
PB		 19880
19881 /* New EABI objects mark thumb function symbols by setting the low bit of
35fc36a8 19882 the address. */
63e1a0fc
PB		 19883 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
19884 || ELF_ST_TYPE (dst->st_info) == STT_GNU_IFUNC)
0beaef2b 19885 {
63e1a0fc
PB		 19886 if (dst->st_value & 1)
19887 {
19888 dst->st_value &= ~(bfd_vma) 1;
39d911fc
TP		 19889 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal,
19890 ST_BRANCH_TO_THUMB);
63e1a0fc
PB		 19891 }
19892 else
39d911fc 19893 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_TO_ARM);
35fc36a8
RS		 19894 }
19895 else if (ELF_ST_TYPE (dst->st_info) == STT_ARM_TFUNC)
19896 {
19897 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_FUNC);
39d911fc 19898 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_TO_THUMB);
0beaef2b 19899 }
35fc36a8 19900 else if (ELF_ST_TYPE (dst->st_info) == STT_SECTION)
39d911fc 19901 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_LONG);
35fc36a8 19902 else
39d911fc 19903 ARM_SET_SYM_BRANCH_TYPE (dst->st_target_internal, ST_BRANCH_UNKNOWN);
35fc36a8 19904
8384fb8f 19905 return TRUE;
0beaef2b
PB		 19906}
19907
19908
19909/* Mangle thumb function symbols as we write them out. */
19910
19911static void
19912elf32_arm_swap_symbol_out (bfd *abfd,
19913 const Elf_Internal_Sym *src,
19914 void *cdst,
19915 void *shndx)
19916{
19917 Elf_Internal_Sym newsym;
19918
19919 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
19920 of the address set, as per the new EABI. We do this unconditionally
19921 because objcopy does not set the elf header flags until after
19922 it writes out the symbol table. */
39d911fc 19923 if (ARM_GET_SYM_BRANCH_TYPE (src->st_target_internal) == ST_BRANCH_TO_THUMB)
0beaef2b
PB		 19924 {
19925 newsym = *src;
34e77a92
RS		 19926 if (ELF_ST_TYPE (src->st_info) != STT_GNU_IFUNC)
19927 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
0fa3dcad 19928 if (newsym.st_shndx != SHN_UNDEF)
99059e56
RM		 19929 {
19930 /* Do this only for defined symbols. At link type, the static
19931 linker will simulate the work of dynamic linker of resolving
19932 symbols and will carry over the thumbness of found symbols to
19933 the output symbol table. It's not clear how it happens, but
19934 the thumbness of undefined symbols can well be different at
19935 runtime, and writing '1' for them will be confusing for users
19936 and possibly for dynamic linker itself.
19937 */
19938 newsym.st_value |= 1;
19939 }
906e58ca 19940
0beaef2b
PB		 19941 src = &newsym;
19942 }
19943 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
19944}
19945
b294bdf8
MM		 19946/* Add the PT_ARM_EXIDX program header. */
19947
19948static bfd_boolean
906e58ca 19949elf32_arm_modify_segment_map (bfd *abfd,
b294bdf8
MM		 19950 struct bfd_link_info *info ATTRIBUTE_UNUSED)
19951{
19952 struct elf_segment_map *m;
19953 asection *sec;
19954
19955 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
19956 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
19957 {
19958 /* If there is already a PT_ARM_EXIDX header, then we do not
19959 want to add another one. This situation arises when running
19960 "strip"; the input binary already has the header. */
12bd6957 19961 m = elf_seg_map (abfd);
b294bdf8
MM		 19962 while (m && m->p_type != PT_ARM_EXIDX)
19963 m = m->next;
19964 if (!m)
19965 {
21d799b5 19966 m = (struct elf_segment_map *)
99059e56 19967 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
b294bdf8
MM		 19968 if (m == NULL)
19969 return FALSE;
19970 m->p_type = PT_ARM_EXIDX;
19971 m->count = 1;
19972 m->sections[0] = sec;
19973
12bd6957
AM		 19974 m->next = elf_seg_map (abfd);
19975 elf_seg_map (abfd) = m;
b294bdf8
MM		 19976 }
19977 }
19978
19979 return TRUE;
19980}
19981
19982/* We may add a PT_ARM_EXIDX program header. */
19983
19984static int
a6b96beb
AM		 19985elf32_arm_additional_program_headers (bfd *abfd,
19986 struct bfd_link_info *info ATTRIBUTE_UNUSED)
b294bdf8
MM		 19987{
19988 asection *sec;
19989
19990 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
19991 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
19992 return 1;
19993 else
19994 return 0;
19995}
19996
34e77a92
RS		 19997/* Hook called by the linker routine which adds symbols from an object
19998 file. */
19999
20000static bfd_boolean
20001elf32_arm_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
20002 Elf_Internal_Sym *sym, const char **namep,
20003 flagword *flagsp, asection **secp, bfd_vma *valp)
20004{
c792917c
NC		 20005 if (elf32_arm_hash_table (info) == NULL)
20006 return FALSE;
20007
34e77a92
RS		 20008 if (elf32_arm_hash_table (info)->vxworks_p
20009 && !elf_vxworks_add_symbol_hook (abfd, info, sym, namep,
20010 flagsp, secp, valp))
20011 return FALSE;
20012
20013 return TRUE;
20014}
20015
0beaef2b 20016/* We use this to override swap_symbol_in and swap_symbol_out. */
906e58ca
NC		 20017const struct elf_size_info elf32_arm_size_info =
20018{
0beaef2b
PB		 20019 sizeof (Elf32_External_Ehdr),
20020 sizeof (Elf32_External_Phdr),
20021 sizeof (Elf32_External_Shdr),
20022 sizeof (Elf32_External_Rel),
20023 sizeof (Elf32_External_Rela),
20024 sizeof (Elf32_External_Sym),
20025 sizeof (Elf32_External_Dyn),
20026 sizeof (Elf_External_Note),
20027 4,
20028 1,
20029 32, 2,
20030 ELFCLASS32, EV_CURRENT,
20031 bfd_elf32_write_out_phdrs,
20032 bfd_elf32_write_shdrs_and_ehdr,
1489a3a0 20033 bfd_elf32_checksum_contents,
0beaef2b
PB		 20034 bfd_elf32_write_relocs,
20035 elf32_arm_swap_symbol_in,
20036 elf32_arm_swap_symbol_out,
20037 bfd_elf32_slurp_reloc_table,
20038 bfd_elf32_slurp_symbol_table,
20039 bfd_elf32_swap_dyn_in,
20040 bfd_elf32_swap_dyn_out,
20041 bfd_elf32_swap_reloc_in,
20042 bfd_elf32_swap_reloc_out,
20043 bfd_elf32_swap_reloca_in,
20044 bfd_elf32_swap_reloca_out
20045};
20046
685e70ae
VK		 20047static bfd_vma
20048read_code32 (const bfd *abfd, const bfd_byte *addr)
20049{
20050 /* V7 BE8 code is always little endian. */
20051 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
20052 return bfd_getl32 (addr);
20053
20054 return bfd_get_32 (abfd, addr);
20055}
20056
20057static bfd_vma
20058read_code16 (const bfd *abfd, const bfd_byte *addr)
20059{
20060 /* V7 BE8 code is always little endian. */
20061 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
20062 return bfd_getl16 (addr);
20063
20064 return bfd_get_16 (abfd, addr);
20065}
20066
6a631e86
YG		 20067/* Return size of plt0 entry starting at ADDR
20068 or (bfd_vma) -1 if size can not be determined. */
20069
20070static bfd_vma
20071elf32_arm_plt0_size (const bfd *abfd, const bfd_byte *addr)
20072{
20073 bfd_vma first_word;
20074 bfd_vma plt0_size;
20075
685e70ae 20076 first_word = read_code32 (abfd, addr);
6a631e86
YG		 20077
20078 if (first_word == elf32_arm_plt0_entry[0])
20079 plt0_size = 4 * ARRAY_SIZE (elf32_arm_plt0_entry);
20080 else if (first_word == elf32_thumb2_plt0_entry[0])
20081 plt0_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
20082 else
20083 /* We don't yet handle this PLT format. */
20084 return (bfd_vma) -1;
20085
20086 return plt0_size;
20087}
20088
20089/* Return size of plt entry starting at offset OFFSET
20090 of plt section located at address START
20091 or (bfd_vma) -1 if size can not be determined. */
20092
20093static bfd_vma
20094elf32_arm_plt_size (const bfd *abfd, const bfd_byte *start, bfd_vma offset)
20095{
20096 bfd_vma first_insn;
20097 bfd_vma plt_size = 0;
20098 const bfd_byte *addr = start + offset;
20099
20100 /* PLT entry size if fixed on Thumb-only platforms. */
685e70ae 20101 if (read_code32 (abfd, start) == elf32_thumb2_plt0_entry[0])
6a631e86
YG		 20102 return 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
20103
20104 /* Respect Thumb stub if necessary. */
685e70ae 20105 if (read_code16 (abfd, addr) == elf32_arm_plt_thumb_stub[0])
6a631e86
YG		 20106 {
20107 plt_size += 2 * ARRAY_SIZE(elf32_arm_plt_thumb_stub);
20108 }
20109
20110 /* Strip immediate from first add. */
685e70ae 20111 first_insn = read_code32 (abfd, addr + plt_size) & 0xffffff00;
6a631e86
YG		 20112
20113#ifdef FOUR_WORD_PLT
20114 if (first_insn == elf32_arm_plt_entry[0])
20115 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry);
20116#else
20117 if (first_insn == elf32_arm_plt_entry_long[0])
20118 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_long);
20119 else if (first_insn == elf32_arm_plt_entry_short[0])
20120 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_short);
20121#endif
20122 else
20123 /* We don't yet handle this PLT format. */
20124 return (bfd_vma) -1;
20125
20126 return plt_size;
20127}
20128
20129/* Implementation is shamelessly borrowed from _bfd_elf_get_synthetic_symtab. */
20130
20131static long
20132elf32_arm_get_synthetic_symtab (bfd *abfd,
20133 long symcount ATTRIBUTE_UNUSED,
20134 asymbol **syms ATTRIBUTE_UNUSED,
20135 long dynsymcount,
20136 asymbol **dynsyms,
20137 asymbol **ret)
20138{
20139 asection *relplt;
20140 asymbol *s;
20141 arelent *p;
20142 long count, i, n;
20143 size_t size;
20144 Elf_Internal_Shdr *hdr;
20145 char *names;
20146 asection *plt;
20147 bfd_vma offset;
20148 bfd_byte *data;
20149
20150 *ret = NULL;
20151
20152 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
20153 return 0;
20154
20155 if (dynsymcount <= 0)
20156 return 0;
20157
20158 relplt = bfd_get_section_by_name (abfd, ".rel.plt");
20159 if (relplt == NULL)
20160 return 0;
20161
20162 hdr = &elf_section_data (relplt)->this_hdr;
20163 if (hdr->sh_link != elf_dynsymtab (abfd)
20164 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
20165 return 0;
20166
20167 plt = bfd_get_section_by_name (abfd, ".plt");
20168 if (plt == NULL)
20169 return 0;
20170
20171 if (!elf32_arm_size_info.slurp_reloc_table (abfd, relplt, dynsyms, TRUE))
20172 return -1;
20173
20174 data = plt->contents;
20175 if (data == NULL)
20176 {
20177 if (!bfd_get_full_section_contents(abfd, (asection *) plt, &data) || data == NULL)
20178 return -1;
20179 bfd_cache_section_contents((asection *) plt, data);
20180 }
20181
20182 count = relplt->size / hdr->sh_entsize;
20183 size = count * sizeof (asymbol);
20184 p = relplt->relocation;
20185 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
20186 {
20187 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
20188 if (p->addend != 0)
20189 size += sizeof ("+0x") - 1 + 8;
20190 }
20191
20192 s = *ret = (asymbol *) bfd_malloc (size);
20193 if (s == NULL)
20194 return -1;
20195
20196 offset = elf32_arm_plt0_size (abfd, data);
20197 if (offset == (bfd_vma) -1)
20198 return -1;
20199
20200 names = (char *) (s + count);
20201 p = relplt->relocation;
20202 n = 0;
20203 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
20204 {
20205 size_t len;
20206
20207 bfd_vma plt_size = elf32_arm_plt_size (abfd, data, offset);
20208 if (plt_size == (bfd_vma) -1)
20209 break;
20210
20211 *s = **p->sym_ptr_ptr;
20212 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
20213 we are defining a symbol, ensure one of them is set. */
20214 if ((s->flags & BSF_LOCAL) == 0)
20215 s->flags |= BSF_GLOBAL;
20216 s->flags |= BSF_SYNTHETIC;
20217 s->section = plt;
20218 s->value = offset;
20219 s->name = names;
20220 s->udata.p = NULL;
20221 len = strlen ((*p->sym_ptr_ptr)->name);
20222 memcpy (names, (*p->sym_ptr_ptr)->name, len);
20223 names += len;
20224 if (p->addend != 0)
20225 {
20226 char buf[30], *a;
20227
20228 memcpy (names, "+0x", sizeof ("+0x") - 1);
20229 names += sizeof ("+0x") - 1;
20230 bfd_sprintf_vma (abfd, buf, p->addend);
20231 for (a = buf; *a == '0'; ++a)
20232 ;
20233 len = strlen (a);
20234 memcpy (names, a, len);
20235 names += len;
20236 }
20237 memcpy (names, "@plt", sizeof ("@plt"));
20238 names += sizeof ("@plt");
20239 ++s, ++n;
20240 offset += plt_size;
20241 }
20242
20243 return n;
20244}
20245
ac4c9b04 20246static bfd_boolean
8c803a2d 20247elf32_arm_section_flags (const Elf_Internal_Shdr *hdr)
ac4c9b04 20248{
f0728ee3 20249 if (hdr->sh_flags & SHF_ARM_PURECODE)
8c803a2d 20250 hdr->bfd_section->flags |= SEC_ELF_PURECODE;
ac4c9b04
MG		 20251 return TRUE;
20252}
20253
20254static flagword
20255elf32_arm_lookup_section_flags (char *flag_name)
20256{
f0728ee3
AV		 20257 if (!strcmp (flag_name, "SHF_ARM_PURECODE"))
20258 return SHF_ARM_PURECODE;
ac4c9b04
MG		 20259
20260 return SEC_NO_FLAGS;
20261}
20262
491d01d3
YU		 20263static unsigned int
20264elf32_arm_count_additional_relocs (asection *sec)
20265{
20266 struct _arm_elf_section_data *arm_data;
20267 arm_data = get_arm_elf_section_data (sec);
5025eb7c 20268
6342be70 20269 return arm_data == NULL ? 0 : arm_data->additional_reloc_count;
491d01d3
YU		 20270}
20271
5522f910 20272/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
9eaff861 20273 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5522f910
NC		 20274 FALSE otherwise. ISECTION is the best guess matching section from the
20275 input bfd IBFD, but it might be NULL. */
20276
20277static bfd_boolean
20278elf32_arm_copy_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
20279 bfd *obfd ATTRIBUTE_UNUSED,
20280 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
20281 Elf_Internal_Shdr *osection)
20282{
20283 switch (osection->sh_type)
20284 {
20285 case SHT_ARM_EXIDX:
20286 {
20287 Elf_Internal_Shdr **oheaders = elf_elfsections (obfd);
20288 Elf_Internal_Shdr **iheaders = elf_elfsections (ibfd);
20289 unsigned i = 0;
20290
20291 osection->sh_flags = SHF_ALLOC | SHF_LINK_ORDER;
20292 osection->sh_info = 0;
20293
20294 /* The sh_link field must be set to the text section associated with
20295 this index section. Unfortunately the ARM EHABI does not specify
20296 exactly how to determine this association. Our caller does try
20297 to match up OSECTION with its corresponding input section however
20298 so that is a good first guess. */
20299 if (isection != NULL
20300 && osection->bfd_section != NULL
20301 && isection->bfd_section != NULL
20302 && isection->bfd_section->output_section != NULL
20303 && isection->bfd_section->output_section == osection->bfd_section
20304 && iheaders != NULL
20305 && isection->sh_link > 0
20306 && isection->sh_link < elf_numsections (ibfd)
20307 && iheaders[isection->sh_link]->bfd_section != NULL
20308 && iheaders[isection->sh_link]->bfd_section->output_section != NULL
20309 )
20310 {
20311 for (i = elf_numsections (obfd); i-- > 0;)
20312 if (oheaders[i]->bfd_section
20313 == iheaders[isection->sh_link]->bfd_section->output_section)
20314 break;
20315 }
9eaff861 20316
5522f910
NC		 20317 if (i == 0)
20318 {
20319 /* Failing that we have to find a matching section ourselves. If
20320 we had the output section name available we could compare that
20321 with input section names. Unfortunately we don't. So instead
20322 we use a simple heuristic and look for the nearest executable
20323 section before this one. */
20324 for (i = elf_numsections (obfd); i-- > 0;)
20325 if (oheaders[i] == osection)
20326 break;
20327 if (i == 0)
20328 break;
20329
20330 while (i-- > 0)
20331 if (oheaders[i]->sh_type == SHT_PROGBITS
20332 && (oheaders[i]->sh_flags & (SHF_ALLOC | SHF_EXECINSTR))
20333 == (SHF_ALLOC | SHF_EXECINSTR))
20334 break;
20335 }
20336
20337 if (i)
20338 {
20339 osection->sh_link = i;
20340 /* If the text section was part of a group
20341 then the index section should be too. */
20342 if (oheaders[i]->sh_flags & SHF_GROUP)
20343 osection->sh_flags |= SHF_GROUP;
20344 return TRUE;
20345 }
20346 }
20347 break;
20348
20349 case SHT_ARM_PREEMPTMAP:
20350 osection->sh_flags = SHF_ALLOC;
20351 break;
20352
20353 case SHT_ARM_ATTRIBUTES:
20354 case SHT_ARM_DEBUGOVERLAY:
20355 case SHT_ARM_OVERLAYSECTION:
20356 default:
20357 break;
20358 }
20359
20360 return FALSE;
20361}
20362
d691934d
NC		 20363/* Returns TRUE if NAME is an ARM mapping symbol.
20364 Traditionally the symbols $a, $d and $t have been used.
20365 The ARM ELF standard also defines $x (for A64 code). It also allows a
20366 period initiated suffix to be added to the symbol: "$[adtx]\.[:sym_char]+".
20367 Other tools might also produce $b (Thumb BL), $f, $p, $m and $v, but we do
20368 not support them here. $t.x indicates the start of ThumbEE instructions. */
20369
20370static bfd_boolean
20371is_arm_mapping_symbol (const char * name)
20372{
20373 return name != NULL /* Paranoia. */
20374 && name[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
20375 the mapping symbols could have acquired a prefix.
20376 We do not support this here, since such symbols no
20377 longer conform to the ARM ELF ABI. */
20378 && (name[1] == 'a' || name[1] == 'd' || name[1] == 't' || name[1] == 'x')
20379 && (name[2] == 0 || name[2] == '.');
20380 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
20381 any characters that follow the period are legal characters for the body
20382 of a symbol's name. For now we just assume that this is the case. */
20383}
20384
fca2a38f
NC		 20385/* Make sure that mapping symbols in object files are not removed via the
20386 "strip --strip-unneeded" tool. These symbols are needed in order to
20387 correctly generate interworking veneers, and for byte swapping code
20388 regions. Once an object file has been linked, it is safe to remove the
20389 symbols as they will no longer be needed. */
20390
20391static void
20392elf32_arm_backend_symbol_processing (bfd *abfd, asymbol *sym)
20393{
20394 if (((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
fca2a38f 20395 && sym->section != bfd_abs_section_ptr
d691934d 20396 && is_arm_mapping_symbol (sym->name))
fca2a38f
NC		 20397 sym->flags |= BSF_KEEP;
20398}
20399
5522f910
NC		 20400#undef elf_backend_copy_special_section_fields
20401#define elf_backend_copy_special_section_fields elf32_arm_copy_special_section_fields
20402
252b5132 20403#define ELF_ARCH bfd_arch_arm
ae95ffa6 20404#define ELF_TARGET_ID ARM_ELF_DATA
252b5132 20405#define ELF_MACHINE_CODE EM_ARM
d0facd1b
NC		 20406#ifdef __QNXTARGET__
20407#define ELF_MAXPAGESIZE 0x1000
20408#else
7572ca89 20409#define ELF_MAXPAGESIZE 0x10000
d0facd1b 20410#endif
b1342370 20411#define ELF_MINPAGESIZE 0x1000
24718e3b 20412#define ELF_COMMONPAGESIZE 0x1000
252b5132 20413
07d6d2b8 20414#define bfd_elf32_mkobject elf32_arm_mkobject
ba93b8ac 20415
99e4ae17
AJ		 20416#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
20417#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH		 20418#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
20419#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
07d6d2b8 20420#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
dc810e39 20421#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
b38cadfb 20422#define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
07d6d2b8 20423#define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
e489d0ae 20424#define bfd_elf32_new_section_hook elf32_arm_new_section_hook
3c9458e9 20425#define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
3e6b1042 20426#define bfd_elf32_bfd_final_link elf32_arm_final_link
07d6d2b8 20427#define bfd_elf32_get_synthetic_symtab elf32_arm_get_synthetic_symtab
252b5132 20428
07d6d2b8 20429#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
e7679060 20430#define elf_backend_maybe_function_sym elf32_arm_maybe_function_sym
07d6d2b8 20431#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
6a5bb875 20432#define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
07d6d2b8 20433#define elf_backend_check_relocs elf32_arm_check_relocs
9eaff861 20434#define elf_backend_update_relocs elf32_arm_update_relocs
dc810e39 20435#define elf_backend_relocate_section elf32_arm_relocate_section
e489d0ae 20436#define elf_backend_write_section elf32_arm_write_section
252b5132 20437#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
07d6d2b8 20438#define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
252b5132
RH		 20439#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
20440#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
20441#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
0855e32b 20442#define elf_backend_always_size_sections elf32_arm_always_size_sections
74541ad4 20443#define elf_backend_init_index_section _bfd_elf_init_2_index_sections
ed7e9d0b 20444#define elf_backend_init_file_header elf32_arm_init_file_header
99e4ae17 20445#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
c178919b 20446#define elf_backend_object_p elf32_arm_object_p
07d6d2b8
AM		 20447#define elf_backend_fake_sections elf32_arm_fake_sections
20448#define elf_backend_section_from_shdr elf32_arm_section_from_shdr
20449#define elf_backend_final_write_processing elf32_arm_final_write_processing
20450#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
0beaef2b 20451#define elf_backend_size_info elf32_arm_size_info
b294bdf8 20452#define elf_backend_modify_segment_map elf32_arm_modify_segment_map
07d6d2b8
AM		 20453#define elf_backend_additional_program_headers elf32_arm_additional_program_headers
20454#define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
54ddd295 20455#define elf_backend_filter_implib_symbols elf32_arm_filter_implib_symbols
07d6d2b8 20456#define elf_backend_begin_write_processing elf32_arm_begin_write_processing
34e77a92 20457#define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
491d01d3 20458#define elf_backend_count_additional_relocs elf32_arm_count_additional_relocs
fca2a38f 20459#define elf_backend_symbol_processing elf32_arm_backend_symbol_processing
906e58ca
NC		 20460
20461#define elf_backend_can_refcount 1
20462#define elf_backend_can_gc_sections 1
20463#define elf_backend_plt_readonly 1
20464#define elf_backend_want_got_plt 1
20465#define elf_backend_want_plt_sym 0
5474d94f 20466#define elf_backend_want_dynrelro 1
906e58ca
NC		 20467#define elf_backend_may_use_rel_p 1
20468#define elf_backend_may_use_rela_p 0
4e7fd91e 20469#define elf_backend_default_use_rela_p 0
64f52338 20470#define elf_backend_dtrel_excludes_plt 1
252b5132 20471
04f7c78d 20472#define elf_backend_got_header_size 12
b68a20d6 20473#define elf_backend_extern_protected_data 1
04f7c78d 20474
07d6d2b8 20475#undef elf_backend_obj_attrs_vendor
906e58ca 20476#define elf_backend_obj_attrs_vendor "aeabi"
07d6d2b8 20477#undef elf_backend_obj_attrs_section
906e58ca 20478#define elf_backend_obj_attrs_section ".ARM.attributes"
07d6d2b8 20479#undef elf_backend_obj_attrs_arg_type
906e58ca 20480#define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
07d6d2b8 20481#undef elf_backend_obj_attrs_section_type
104d59d1 20482#define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
b38cadfb 20483#define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
07d6d2b8 20484#define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
104d59d1 20485
07d6d2b8 20486#undef elf_backend_section_flags
ac4c9b04 20487#define elf_backend_section_flags elf32_arm_section_flags
07d6d2b8
AM		 20488#undef elf_backend_lookup_section_flags_hook
20489#define elf_backend_lookup_section_flags_hook elf32_arm_lookup_section_flags
ac4c9b04 20490
a2f63b2e
MR		 20491#define elf_backend_linux_prpsinfo32_ugid16 TRUE
20492
252b5132 20493#include "elf32-target.h"
7f266840 20494
b38cadfb
NC		 20495/* Native Client targets. */
20496
20497#undef TARGET_LITTLE_SYM
6d00b590 20498#define TARGET_LITTLE_SYM arm_elf32_nacl_le_vec
b38cadfb
NC		 20499#undef TARGET_LITTLE_NAME
20500#define TARGET_LITTLE_NAME "elf32-littlearm-nacl"
20501#undef TARGET_BIG_SYM
6d00b590 20502#define TARGET_BIG_SYM arm_elf32_nacl_be_vec
b38cadfb
NC		 20503#undef TARGET_BIG_NAME
20504#define TARGET_BIG_NAME "elf32-bigarm-nacl"
20505
20506/* Like elf32_arm_link_hash_table_create -- but overrides
20507 appropriately for NaCl. */
20508
20509static struct bfd_link_hash_table *
20510elf32_arm_nacl_link_hash_table_create (bfd *abfd)
20511{
20512 struct bfd_link_hash_table *ret;
20513
20514 ret = elf32_arm_link_hash_table_create (abfd);
20515 if (ret)
20516 {
20517 struct elf32_arm_link_hash_table *htab
20518 = (struct elf32_arm_link_hash_table *) ret;
20519
20520 htab->nacl_p = 1;
20521
20522 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt0_entry);
20523 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt_entry);
20524 }
20525 return ret;
20526}
20527
20528/* Since NaCl doesn't use the ARM-specific unwind format, we don't
20529 really need to use elf32_arm_modify_segment_map. But we do it
20530 anyway just to reduce gratuitous differences with the stock ARM backend. */
20531
20532static bfd_boolean
20533elf32_arm_nacl_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
20534{
20535 return (elf32_arm_modify_segment_map (abfd, info)
20536 && nacl_modify_segment_map (abfd, info));
20537}
20538
cc364be6
AM		 20539static bfd_boolean
20540elf32_arm_nacl_final_write_processing (bfd *abfd)
887badb3 20541{
cc364be6
AM		 20542 arm_final_write_processing (abfd);
20543 return nacl_final_write_processing (abfd);
887badb3
RM		 20544}
20545
6a631e86
YG		 20546static bfd_vma
20547elf32_arm_nacl_plt_sym_val (bfd_vma i, const asection *plt,
20548 const arelent *rel ATTRIBUTE_UNUSED)
20549{
20550 return plt->vma
20551 + 4 * (ARRAY_SIZE (elf32_arm_nacl_plt0_entry) +
20552 i * ARRAY_SIZE (elf32_arm_nacl_plt_entry));
20553}
887badb3 20554
b38cadfb 20555#undef elf32_bed
6a631e86 20556#define elf32_bed elf32_arm_nacl_bed
b38cadfb
NC		 20557#undef bfd_elf32_bfd_link_hash_table_create
20558#define bfd_elf32_bfd_link_hash_table_create \
20559 elf32_arm_nacl_link_hash_table_create
20560#undef elf_backend_plt_alignment
6a631e86 20561#define elf_backend_plt_alignment 4
b38cadfb
NC		 20562#undef elf_backend_modify_segment_map
20563#define elf_backend_modify_segment_map elf32_arm_nacl_modify_segment_map
6d6c25c8
AM		 20564#undef elf_backend_modify_headers
20565#define elf_backend_modify_headers nacl_modify_headers
887badb3
RM		 20566#undef elf_backend_final_write_processing
20567#define elf_backend_final_write_processing elf32_arm_nacl_final_write_processing
6a631e86
YG		 20568#undef bfd_elf32_get_synthetic_symtab
20569#undef elf_backend_plt_sym_val
20570#define elf_backend_plt_sym_val elf32_arm_nacl_plt_sym_val
5522f910 20571#undef elf_backend_copy_special_section_fields
b38cadfb 20572
887badb3
RM		 20573#undef ELF_MINPAGESIZE
20574#undef ELF_COMMONPAGESIZE
20575
b38cadfb
NC		 20576
20577#include "elf32-target.h"
20578
20579/* Reset to defaults. */
20580#undef elf_backend_plt_alignment
20581#undef elf_backend_modify_segment_map
20582#define elf_backend_modify_segment_map elf32_arm_modify_segment_map
6d6c25c8 20583#undef elf_backend_modify_headers
887badb3
RM		 20584#undef elf_backend_final_write_processing
20585#define elf_backend_final_write_processing elf32_arm_final_write_processing
20586#undef ELF_MINPAGESIZE
20587#define ELF_MINPAGESIZE 0x1000
20588#undef ELF_COMMONPAGESIZE
20589#define ELF_COMMONPAGESIZE 0x1000
20590
b38cadfb 20591
617a5ada
CL		 20592/* FDPIC Targets. */
20593
20594#undef TARGET_LITTLE_SYM
20595#define TARGET_LITTLE_SYM arm_elf32_fdpic_le_vec
20596#undef TARGET_LITTLE_NAME
20597#define TARGET_LITTLE_NAME "elf32-littlearm-fdpic"
20598#undef TARGET_BIG_SYM
20599#define TARGET_BIG_SYM arm_elf32_fdpic_be_vec
20600#undef TARGET_BIG_NAME
20601#define TARGET_BIG_NAME "elf32-bigarm-fdpic"
20602#undef elf_match_priority
20603#define elf_match_priority 128
18a20338
CL		 20604#undef ELF_OSABI
20605#define ELF_OSABI ELFOSABI_ARM_FDPIC
617a5ada
CL		 20606
20607/* Like elf32_arm_link_hash_table_create -- but overrides
20608 appropriately for FDPIC. */
20609
20610static struct bfd_link_hash_table *
20611elf32_arm_fdpic_link_hash_table_create (bfd *abfd)
20612{
20613 struct bfd_link_hash_table *ret;
20614
20615 ret = elf32_arm_link_hash_table_create (abfd);
20616 if (ret)
20617 {
20618 struct elf32_arm_link_hash_table *htab = (struct elf32_arm_link_hash_table *) ret;
20619
20620 htab->fdpic_p = 1;
20621 }
20622 return ret;
20623}
20624
e8b09b87
CL		 20625/* We need dynamic symbols for every section, since segments can
20626 relocate independently. */
20627static bfd_boolean
20628elf32_arm_fdpic_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
20629 struct bfd_link_info *info
20630 ATTRIBUTE_UNUSED,
20631 asection *p ATTRIBUTE_UNUSED)
20632{
20633 switch (elf_section_data (p)->this_hdr.sh_type)
20634 {
20635 case SHT_PROGBITS:
20636 case SHT_NOBITS:
20637 /* If sh_type is yet undecided, assume it could be
20638 SHT_PROGBITS/SHT_NOBITS. */
20639 case SHT_NULL:
20640 return FALSE;
20641
20642 /* There shouldn't be section relative relocations
20643 against any other section. */
20644 default:
20645 return TRUE;
20646 }
20647}
20648
617a5ada
CL		 20649#undef elf32_bed
20650#define elf32_bed elf32_arm_fdpic_bed
20651
20652#undef bfd_elf32_bfd_link_hash_table_create
4b24dd1a 20653#define bfd_elf32_bfd_link_hash_table_create elf32_arm_fdpic_link_hash_table_create
617a5ada 20654
e8b09b87
CL		 20655#undef elf_backend_omit_section_dynsym
20656#define elf_backend_omit_section_dynsym elf32_arm_fdpic_omit_section_dynsym
20657
617a5ada 20658#include "elf32-target.h"
e8b09b87 20659
617a5ada 20660#undef elf_match_priority
18a20338 20661#undef ELF_OSABI
e8b09b87 20662#undef elf_backend_omit_section_dynsym
617a5ada 20663
906e58ca 20664/* VxWorks Targets. */
4e7fd91e 20665
07d6d2b8
AM		 20666#undef TARGET_LITTLE_SYM
20667#define TARGET_LITTLE_SYM arm_elf32_vxworks_le_vec
20668#undef TARGET_LITTLE_NAME
20669#define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
20670#undef TARGET_BIG_SYM
20671#define TARGET_BIG_SYM arm_elf32_vxworks_be_vec
20672#undef TARGET_BIG_NAME
20673#define TARGET_BIG_NAME "elf32-bigarm-vxworks"
4e7fd91e
PB		 20674
20675/* Like elf32_arm_link_hash_table_create -- but overrides
20676 appropriately for VxWorks. */
906e58ca 20677
4e7fd91e
PB		 20678static struct bfd_link_hash_table *
20679elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
20680{
20681 struct bfd_link_hash_table *ret;
20682
20683 ret = elf32_arm_link_hash_table_create (abfd);
20684 if (ret)
20685 {
20686 struct elf32_arm_link_hash_table *htab
00a97672 20687 = (struct elf32_arm_link_hash_table *) ret;
4e7fd91e 20688 htab->use_rel = 0;
00a97672 20689 htab->vxworks_p = 1;
4e7fd91e
PB		 20690 }
20691 return ret;
906e58ca 20692}
4e7fd91e 20693
cc364be6
AM		 20694static bfd_boolean
20695elf32_arm_vxworks_final_write_processing (bfd *abfd)
00a97672 20696{
cc364be6
AM		 20697 arm_final_write_processing (abfd);
20698 return elf_vxworks_final_write_processing (abfd);
00a97672
RS		 20699}
20700
906e58ca 20701#undef elf32_bed
4e7fd91e
PB		 20702#define elf32_bed elf32_arm_vxworks_bed
20703
906e58ca
NC		 20704#undef bfd_elf32_bfd_link_hash_table_create
20705#define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
906e58ca
NC		 20706#undef elf_backend_final_write_processing
20707#define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
20708#undef elf_backend_emit_relocs
9eaff861 20709#define elf_backend_emit_relocs elf_vxworks_emit_relocs
4e7fd91e 20710
906e58ca 20711#undef elf_backend_may_use_rel_p
00a97672 20712#define elf_backend_may_use_rel_p 0
906e58ca 20713#undef elf_backend_may_use_rela_p
00a97672 20714#define elf_backend_may_use_rela_p 1
906e58ca 20715#undef elf_backend_default_use_rela_p
00a97672 20716#define elf_backend_default_use_rela_p 1
906e58ca 20717#undef elf_backend_want_plt_sym
00a97672 20718#define elf_backend_want_plt_sym 1
906e58ca 20719#undef ELF_MAXPAGESIZE
00a97672 20720#define ELF_MAXPAGESIZE 0x1000
4e7fd91e
PB		 20721
20722#include "elf32-target.h"
20723
20724
21d799b5
NC		 20725/* Merge backend specific data from an object file to the output
20726 object file when linking. */
20727
20728static bfd_boolean
50e03d47 20729elf32_arm_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
21d799b5 20730{
50e03d47 20731 bfd *obfd = info->output_bfd;
21d799b5
NC		 20732 flagword out_flags;
20733 flagword in_flags;
20734 bfd_boolean flags_compatible = TRUE;
20735 asection *sec;
20736
cc643b88 20737 /* Check if we have the same endianness. */
50e03d47 20738 if (! _bfd_generic_verify_endian_match (ibfd, info))
21d799b5
NC		 20739 return FALSE;
20740
20741 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
20742 return TRUE;
20743
50e03d47 20744 if (!elf32_arm_merge_eabi_attributes (ibfd, info))
21d799b5
NC		 20745 return FALSE;
20746
20747 /* The input BFD must have had its flags initialised. */
20748 /* The following seems bogus to me -- The flags are initialized in
20749 the assembler but I don't think an elf_flags_init field is
20750 written into the object. */
20751 /* BFD_ASSERT (elf_flags_init (ibfd)); */
20752
20753 in_flags = elf_elfheader (ibfd)->e_flags;
20754 out_flags = elf_elfheader (obfd)->e_flags;
20755
20756 /* In theory there is no reason why we couldn't handle this. However
20757 in practice it isn't even close to working and there is no real
20758 reason to want it. */
20759 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
20760 && !(ibfd->flags & DYNAMIC)
20761 && (in_flags & EF_ARM_BE8))
20762 {
871b3ab2 20763 _bfd_error_handler (_("error: %pB is already in final BE8 format"),
21d799b5
NC		 20764 ibfd);
20765 return FALSE;
20766 }
20767
20768 if (!elf_flags_init (obfd))
20769 {
20770 /* If the input is the default architecture and had the default
20771 flags then do not bother setting the flags for the output
20772 architecture, instead allow future merges to do this. If no
20773 future merges ever set these flags then they will retain their
99059e56
RM		 20774 uninitialised values, which surprise surprise, correspond
20775 to the default values. */
21d799b5
NC		 20776 if (bfd_get_arch_info (ibfd)->the_default
20777 && elf_elfheader (ibfd)->e_flags == 0)
20778 return TRUE;
20779
20780 elf_flags_init (obfd) = TRUE;
20781 elf_elfheader (obfd)->e_flags = in_flags;
20782
20783 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
20784 && bfd_get_arch_info (obfd)->the_default)
20785 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
20786
20787 return TRUE;
20788 }
20789
20790 /* Determine what should happen if the input ARM architecture
20791 does not match the output ARM architecture. */
20792 if (! bfd_arm_merge_machines (ibfd, obfd))
20793 return FALSE;
20794
20795 /* Identical flags must be compatible. */
20796 if (in_flags == out_flags)
20797 return TRUE;
20798
20799 /* Check to see if the input BFD actually contains any sections. If
20800 not, its flags may not have been initialised either, but it
20801 cannot actually cause any incompatiblity. Do not short-circuit
20802 dynamic objects; their section list may be emptied by
20803 elf_link_add_object_symbols.
20804
20805 Also check to see if there are no code sections in the input.
20806 In this case there is no need to check for code specific flags.
20807 XXX - do we need to worry about floating-point format compatability
20808 in data sections ? */
20809 if (!(ibfd->flags & DYNAMIC))
20810 {
20811 bfd_boolean null_input_bfd = TRUE;
20812 bfd_boolean only_data_sections = TRUE;
20813
20814 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
20815 {
20816 /* Ignore synthetic glue sections. */
20817 if (strcmp (sec->name, ".glue_7")
20818 && strcmp (sec->name, ".glue_7t"))
20819 {
fd361982 20820 if ((bfd_section_flags (sec)
21d799b5
NC		 20821 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
20822 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
99059e56 20823 only_data_sections = FALSE;
21d799b5
NC		 20824
20825 null_input_bfd = FALSE;
20826 break;
20827 }
20828 }
20829
20830 if (null_input_bfd || only_data_sections)
20831 return TRUE;
20832 }
20833
20834 /* Complain about various flag mismatches. */
20835 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
20836 EF_ARM_EABI_VERSION (out_flags)))
20837 {
20838 _bfd_error_handler
90b6238f 20839 (_("error: source object %pB has EABI version %d, but target %pB has EABI version %d"),
c08bb8dd
AM		 20840 ibfd, (in_flags & EF_ARM_EABIMASK) >> 24,
20841 obfd, (out_flags & EF_ARM_EABIMASK) >> 24);
21d799b5
NC		 20842 return FALSE;
20843 }
20844
20845 /* Not sure what needs to be checked for EABI versions >= 1. */
20846 /* VxWorks libraries do not use these flags. */
20847 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
20848 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
20849 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
20850 {
20851 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
20852 {
20853 _bfd_error_handler
871b3ab2 20854 (_("error: %pB is compiled for APCS-%d, whereas target %pB uses APCS-%d"),
c08bb8dd
AM		 20855 ibfd, in_flags & EF_ARM_APCS_26 ? 26 : 32,
20856 obfd, out_flags & EF_ARM_APCS_26 ? 26 : 32);
21d799b5
NC		 20857 flags_compatible = FALSE;
20858 }
20859
20860 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
20861 {
20862 if (in_flags & EF_ARM_APCS_FLOAT)
20863 _bfd_error_handler
871b3ab2 20864 (_("error: %pB passes floats in float registers, whereas %pB passes them in integer registers"),
21d799b5
NC		 20865 ibfd, obfd);
20866 else
20867 _bfd_error_handler
871b3ab2 20868 (_("error: %pB passes floats in integer registers, whereas %pB passes them in float registers"),
21d799b5
NC		 20869 ibfd, obfd);
20870
20871 flags_compatible = FALSE;
20872 }
20873
20874 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
20875 {
20876 if (in_flags & EF_ARM_VFP_FLOAT)
20877 _bfd_error_handler
90b6238f
AM		 20878 (_("error: %pB uses %s instructions, whereas %pB does not"),
20879 ibfd, "VFP", obfd);
21d799b5
NC		 20880 else
20881 _bfd_error_handler
90b6238f
AM		 20882 (_("error: %pB uses %s instructions, whereas %pB does not"),
20883 ibfd, "FPA", obfd);
21d799b5
NC		 20884
20885 flags_compatible = FALSE;
20886 }
20887
20888 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
20889 {
20890 if (in_flags & EF_ARM_MAVERICK_FLOAT)
20891 _bfd_error_handler
90b6238f
AM		 20892 (_("error: %pB uses %s instructions, whereas %pB does not"),
20893 ibfd, "Maverick", obfd);
21d799b5
NC		 20894 else
20895 _bfd_error_handler
90b6238f
AM		 20896 (_("error: %pB does not use %s instructions, whereas %pB does"),
20897 ibfd, "Maverick", obfd);
21d799b5
NC		 20898
20899 flags_compatible = FALSE;
20900 }
20901
20902#ifdef EF_ARM_SOFT_FLOAT
20903 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
20904 {
20905 /* We can allow interworking between code that is VFP format
20906 layout, and uses either soft float or integer regs for
20907 passing floating point arguments and results. We already
20908 know that the APCS_FLOAT flags match; similarly for VFP
20909 flags. */
20910 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
20911 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
20912 {
20913 if (in_flags & EF_ARM_SOFT_FLOAT)
20914 _bfd_error_handler
871b3ab2 20915 (_("error: %pB uses software FP, whereas %pB uses hardware FP"),
21d799b5
NC		 20916 ibfd, obfd);
20917 else
20918 _bfd_error_handler
871b3ab2 20919 (_("error: %pB uses hardware FP, whereas %pB uses software FP"),
21d799b5
NC		 20920 ibfd, obfd);
20921
20922 flags_compatible = FALSE;
20923 }
20924 }
20925#endif
20926
20927 /* Interworking mismatch is only a warning. */
20928 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
20929 {
20930 if (in_flags & EF_ARM_INTERWORK)
20931 {
20932 _bfd_error_handler
90b6238f 20933 (_("warning: %pB supports interworking, whereas %pB does not"),
21d799b5
NC		 20934 ibfd, obfd);
20935 }
20936 else
20937 {
20938 _bfd_error_handler
90b6238f 20939 (_("warning: %pB does not support interworking, whereas %pB does"),
21d799b5
NC		 20940 ibfd, obfd);
20941 }
20942 }
20943 }
20944
20945 return flags_compatible;
20946}
20947
20948
906e58ca 20949/* Symbian OS Targets. */
7f266840 20950
07d6d2b8
AM		 20951#undef TARGET_LITTLE_SYM
20952#define TARGET_LITTLE_SYM arm_elf32_symbian_le_vec
20953#undef TARGET_LITTLE_NAME
20954#define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
20955#undef TARGET_BIG_SYM
20956#define TARGET_BIG_SYM arm_elf32_symbian_be_vec
20957#undef TARGET_BIG_NAME
20958#define TARGET_BIG_NAME "elf32-bigarm-symbian"
7f266840
DJ		 20959
20960/* Like elf32_arm_link_hash_table_create -- but overrides
20961 appropriately for Symbian OS. */
906e58ca 20962
7f266840
DJ		 20963static struct bfd_link_hash_table *
20964elf32_arm_symbian_link_hash_table_create (bfd *abfd)
20965{
20966 struct bfd_link_hash_table *ret;
20967
20968 ret = elf32_arm_link_hash_table_create (abfd);
20969 if (ret)
20970 {
20971 struct elf32_arm_link_hash_table *htab
20972 = (struct elf32_arm_link_hash_table *)ret;
20973 /* There is no PLT header for Symbian OS. */
20974 htab->plt_header_size = 0;
95720a86
DJ		 20975 /* The PLT entries are each one instruction and one word. */
20976 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
7f266840 20977 htab->symbian_p = 1;
33bfe774
JB		 20978 /* Symbian uses armv5t or above, so use_blx is always true. */
20979 htab->use_blx = 1;
67687978 20980 htab->root.is_relocatable_executable = 1;
7f266840
DJ		 20981 }
20982 return ret;
906e58ca 20983}
7f266840 20984
b35d266b 20985static const struct bfd_elf_special_section
551b43fd 20986elf32_arm_symbian_special_sections[] =
7f266840 20987{
5cd3778d
MM		 20988 /* In a BPABI executable, the dynamic linking sections do not go in
20989 the loadable read-only segment. The post-linker may wish to
20990 refer to these sections, but they are not part of the final
20991 program image. */
07d6d2b8
AM		 20992 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
20993 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
20994 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
20995 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
20996 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
5cd3778d
MM		 20997 /* These sections do not need to be writable as the SymbianOS
20998 postlinker will arrange things so that no dynamic relocation is
20999 required. */
07d6d2b8
AM		 21000 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
21001 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
0112cd26 21002 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
07d6d2b8 21003 { NULL, 0, 0, 0, 0 }
7f266840
DJ		 21004};
21005
c3c76620 21006static void
906e58ca 21007elf32_arm_symbian_begin_write_processing (bfd *abfd,
a4fd1a8e 21008 struct bfd_link_info *link_info)
c3c76620
MM		 21009{
21010 /* BPABI objects are never loaded directly by an OS kernel; they are
21011 processed by a postlinker first, into an OS-specific format. If
21012 the D_PAGED bit is set on the file, BFD will align segments on
21013 page boundaries, so that an OS can directly map the file. With
21014 BPABI objects, that just results in wasted space. In addition,
21015 because we clear the D_PAGED bit, map_sections_to_segments will
21016 recognize that the program headers should not be mapped into any
21017 loadable segment. */
21018 abfd->flags &= ~D_PAGED;
906e58ca 21019 elf32_arm_begin_write_processing (abfd, link_info);
c3c76620 21020}
7f266840
DJ		 21021
21022static bfd_boolean
906e58ca 21023elf32_arm_symbian_modify_segment_map (bfd *abfd,
b294bdf8 21024 struct bfd_link_info *info)
7f266840
DJ		 21025{
21026 struct elf_segment_map *m;
21027 asection *dynsec;
21028
7f266840
DJ		 21029 /* BPABI shared libraries and executables should have a PT_DYNAMIC
21030 segment. However, because the .dynamic section is not marked
21031 with SEC_LOAD, the generic ELF code will not create such a
21032 segment. */
21033 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
21034 if (dynsec)
21035 {
12bd6957 21036 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
8ded5a0f
AM		 21037 if (m->p_type == PT_DYNAMIC)
21038 break;
21039
21040 if (m == NULL)
21041 {
21042 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
12bd6957
AM		 21043 m->next = elf_seg_map (abfd);
21044 elf_seg_map (abfd) = m;
8ded5a0f 21045 }
7f266840
DJ		 21046 }
21047
b294bdf8
MM		 21048 /* Also call the generic arm routine. */
21049 return elf32_arm_modify_segment_map (abfd, info);
7f266840
DJ		 21050}
21051
95720a86
DJ		 21052/* Return address for Ith PLT stub in section PLT, for relocation REL
21053 or (bfd_vma) -1 if it should not be included. */
21054
21055static bfd_vma
21056elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
21057 const arelent *rel ATTRIBUTE_UNUSED)
21058{
21059 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
21060}
21061
8029a119 21062#undef elf32_bed
7f266840
DJ		 21063#define elf32_bed elf32_arm_symbian_bed
21064
21065/* The dynamic sections are not allocated on SymbianOS; the postlinker
21066 will process them and then discard them. */
906e58ca 21067#undef ELF_DYNAMIC_SEC_FLAGS
7f266840
DJ		 21068#define ELF_DYNAMIC_SEC_FLAGS \
21069 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
21070
9eaff861 21071#undef elf_backend_emit_relocs
c3c76620 21072
906e58ca
NC		 21073#undef bfd_elf32_bfd_link_hash_table_create
21074#define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
21075#undef elf_backend_special_sections
07d6d2b8 21076#define elf_backend_special_sections elf32_arm_symbian_special_sections
906e58ca
NC		 21077#undef elf_backend_begin_write_processing
21078#define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
21079#undef elf_backend_final_write_processing
21080#define elf_backend_final_write_processing elf32_arm_final_write_processing
21081
21082#undef elf_backend_modify_segment_map
7f266840
DJ		 21083#define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
21084
21085/* There is no .got section for BPABI objects, and hence no header. */
906e58ca 21086#undef elf_backend_got_header_size
7f266840
DJ		 21087#define elf_backend_got_header_size 0
21088
21089/* Similarly, there is no .got.plt section. */
906e58ca 21090#undef elf_backend_want_got_plt
7f266840
DJ		 21091#define elf_backend_want_got_plt 0
21092
906e58ca 21093#undef elf_backend_plt_sym_val
95720a86
DJ		 21094#define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
21095
906e58ca 21096#undef elf_backend_may_use_rel_p
00a97672 21097#define elf_backend_may_use_rel_p 1
906e58ca 21098#undef elf_backend_may_use_rela_p
00a97672 21099#define elf_backend_may_use_rela_p 0
906e58ca 21100#undef elf_backend_default_use_rela_p
00a97672 21101#define elf_backend_default_use_rela_p 0
906e58ca 21102#undef elf_backend_want_plt_sym
00a97672 21103#define elf_backend_want_plt_sym 0
64f52338
AM		 21104#undef elf_backend_dtrel_excludes_plt
21105#define elf_backend_dtrel_excludes_plt 0
906e58ca 21106#undef ELF_MAXPAGESIZE
00a97672 21107#define ELF_MAXPAGESIZE 0x8000
4e7fd91e 21108
7f266840 21109#include "elf32-target.h"
GDB Binutils - Deliverables
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