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[ARC] Fix typo in extension instruction name.
[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
1 /* 32-bit ELF support for ARM
2 Copyright (C) 1998-2016 Free Software Foundation, Inc.
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
8 the Free Software Foundation; either version 3 of the License, or
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
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include <limits.h>
23
24 #include "bfd.h"
25 #include "bfd_stdint.h"
26 #include "libiberty.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 #include "elf-nacl.h"
30 #include "elf-vxworks.h"
31 #include "elf/arm.h"
32
33 /* Return the relocation section associated with NAME. HTAB is the
34 bfd's elf32_arm_link_hash_entry. */
35 #define RELOC_SECTION(HTAB, NAME) \
36 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
37
38 /* Return size of a relocation entry. HTAB is the bfd's
39 elf32_arm_link_hash_entry. */
40 #define RELOC_SIZE(HTAB) \
41 ((HTAB)->use_rel \
42 ? sizeof (Elf32_External_Rel) \
43 : sizeof (Elf32_External_Rela))
44
45 /* Return function to swap relocations in. HTAB is the bfd's
46 elf32_arm_link_hash_entry. */
47 #define SWAP_RELOC_IN(HTAB) \
48 ((HTAB)->use_rel \
49 ? bfd_elf32_swap_reloc_in \
50 : bfd_elf32_swap_reloca_in)
51
52 /* Return function to swap relocations out. HTAB is the bfd's
53 elf32_arm_link_hash_entry. */
54 #define SWAP_RELOC_OUT(HTAB) \
55 ((HTAB)->use_rel \
56 ? bfd_elf32_swap_reloc_out \
57 : bfd_elf32_swap_reloca_out)
58
59 #define elf_info_to_howto 0
60 #define elf_info_to_howto_rel elf32_arm_info_to_howto
61
62 #define ARM_ELF_ABI_VERSION 0
63 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
64
65 /* The Adjusted Place, as defined by AAELF. */
66 #define Pa(X) ((X) & 0xfffffffc)
67
68 static bfd_boolean elf32_arm_write_section (bfd *output_bfd,
69 struct bfd_link_info *link_info,
70 asection *sec,
71 bfd_byte *contents);
72
73 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
74 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
75 in that slot. */
76
77 static reloc_howto_type elf32_arm_howto_table_1[] =
78 {
79 /* No relocation. */
80 HOWTO (R_ARM_NONE, /* type */
81 0, /* rightshift */
82 3, /* size (0 = byte, 1 = short, 2 = long) */
83 0, /* bitsize */
84 FALSE, /* pc_relative */
85 0, /* bitpos */
86 complain_overflow_dont,/* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_ARM_NONE", /* name */
89 FALSE, /* partial_inplace */
90 0, /* src_mask */
91 0, /* dst_mask */
92 FALSE), /* pcrel_offset */
93
94 HOWTO (R_ARM_PC24, /* type */
95 2, /* rightshift */
96 2, /* size (0 = byte, 1 = short, 2 = long) */
97 24, /* bitsize */
98 TRUE, /* pc_relative */
99 0, /* bitpos */
100 complain_overflow_signed,/* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_ARM_PC24", /* name */
103 FALSE, /* partial_inplace */
104 0x00ffffff, /* src_mask */
105 0x00ffffff, /* dst_mask */
106 TRUE), /* pcrel_offset */
107
108 /* 32 bit absolute */
109 HOWTO (R_ARM_ABS32, /* type */
110 0, /* rightshift */
111 2, /* size (0 = byte, 1 = short, 2 = long) */
112 32, /* bitsize */
113 FALSE, /* pc_relative */
114 0, /* bitpos */
115 complain_overflow_bitfield,/* complain_on_overflow */
116 bfd_elf_generic_reloc, /* special_function */
117 "R_ARM_ABS32", /* name */
118 FALSE, /* partial_inplace */
119 0xffffffff, /* src_mask */
120 0xffffffff, /* dst_mask */
121 FALSE), /* pcrel_offset */
122
123 /* standard 32bit pc-relative reloc */
124 HOWTO (R_ARM_REL32, /* type */
125 0, /* rightshift */
126 2, /* size (0 = byte, 1 = short, 2 = long) */
127 32, /* bitsize */
128 TRUE, /* pc_relative */
129 0, /* bitpos */
130 complain_overflow_bitfield,/* complain_on_overflow */
131 bfd_elf_generic_reloc, /* special_function */
132 "R_ARM_REL32", /* name */
133 FALSE, /* partial_inplace */
134 0xffffffff, /* src_mask */
135 0xffffffff, /* dst_mask */
136 TRUE), /* pcrel_offset */
137
138 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
139 HOWTO (R_ARM_LDR_PC_G0, /* type */
140 0, /* rightshift */
141 0, /* size (0 = byte, 1 = short, 2 = long) */
142 32, /* bitsize */
143 TRUE, /* pc_relative */
144 0, /* bitpos */
145 complain_overflow_dont,/* complain_on_overflow */
146 bfd_elf_generic_reloc, /* special_function */
147 "R_ARM_LDR_PC_G0", /* name */
148 FALSE, /* partial_inplace */
149 0xffffffff, /* src_mask */
150 0xffffffff, /* dst_mask */
151 TRUE), /* pcrel_offset */
152
153 /* 16 bit absolute */
154 HOWTO (R_ARM_ABS16, /* type */
155 0, /* rightshift */
156 1, /* size (0 = byte, 1 = short, 2 = long) */
157 16, /* bitsize */
158 FALSE, /* pc_relative */
159 0, /* bitpos */
160 complain_overflow_bitfield,/* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_ARM_ABS16", /* name */
163 FALSE, /* partial_inplace */
164 0x0000ffff, /* src_mask */
165 0x0000ffff, /* dst_mask */
166 FALSE), /* pcrel_offset */
167
168 /* 12 bit absolute */
169 HOWTO (R_ARM_ABS12, /* type */
170 0, /* rightshift */
171 2, /* size (0 = byte, 1 = short, 2 = long) */
172 12, /* bitsize */
173 FALSE, /* pc_relative */
174 0, /* bitpos */
175 complain_overflow_bitfield,/* complain_on_overflow */
176 bfd_elf_generic_reloc, /* special_function */
177 "R_ARM_ABS12", /* name */
178 FALSE, /* partial_inplace */
179 0x00000fff, /* src_mask */
180 0x00000fff, /* dst_mask */
181 FALSE), /* pcrel_offset */
182
183 HOWTO (R_ARM_THM_ABS5, /* type */
184 6, /* rightshift */
185 1, /* size (0 = byte, 1 = short, 2 = long) */
186 5, /* bitsize */
187 FALSE, /* pc_relative */
188 0, /* bitpos */
189 complain_overflow_bitfield,/* complain_on_overflow */
190 bfd_elf_generic_reloc, /* special_function */
191 "R_ARM_THM_ABS5", /* name */
192 FALSE, /* partial_inplace */
193 0x000007e0, /* src_mask */
194 0x000007e0, /* dst_mask */
195 FALSE), /* pcrel_offset */
196
197 /* 8 bit absolute */
198 HOWTO (R_ARM_ABS8, /* type */
199 0, /* rightshift */
200 0, /* size (0 = byte, 1 = short, 2 = long) */
201 8, /* bitsize */
202 FALSE, /* pc_relative */
203 0, /* bitpos */
204 complain_overflow_bitfield,/* complain_on_overflow */
205 bfd_elf_generic_reloc, /* special_function */
206 "R_ARM_ABS8", /* name */
207 FALSE, /* partial_inplace */
208 0x000000ff, /* src_mask */
209 0x000000ff, /* dst_mask */
210 FALSE), /* pcrel_offset */
211
212 HOWTO (R_ARM_SBREL32, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 32, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_dont,/* complain_on_overflow */
219 bfd_elf_generic_reloc, /* special_function */
220 "R_ARM_SBREL32", /* name */
221 FALSE, /* partial_inplace */
222 0xffffffff, /* src_mask */
223 0xffffffff, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 HOWTO (R_ARM_THM_CALL, /* type */
227 1, /* rightshift */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
229 24, /* bitsize */
230 TRUE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_signed,/* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_ARM_THM_CALL", /* name */
235 FALSE, /* partial_inplace */
236 0x07ff2fff, /* src_mask */
237 0x07ff2fff, /* dst_mask */
238 TRUE), /* pcrel_offset */
239
240 HOWTO (R_ARM_THM_PC8, /* type */
241 1, /* rightshift */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
243 8, /* bitsize */
244 TRUE, /* pc_relative */
245 0, /* bitpos */
246 complain_overflow_signed,/* complain_on_overflow */
247 bfd_elf_generic_reloc, /* special_function */
248 "R_ARM_THM_PC8", /* name */
249 FALSE, /* partial_inplace */
250 0x000000ff, /* src_mask */
251 0x000000ff, /* dst_mask */
252 TRUE), /* pcrel_offset */
253
254 HOWTO (R_ARM_BREL_ADJ, /* type */
255 1, /* rightshift */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
257 32, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_signed,/* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_ARM_BREL_ADJ", /* name */
263 FALSE, /* partial_inplace */
264 0xffffffff, /* src_mask */
265 0xffffffff, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 HOWTO (R_ARM_TLS_DESC, /* type */
269 0, /* rightshift */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
271 32, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_bitfield,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_ARM_TLS_DESC", /* name */
277 FALSE, /* partial_inplace */
278 0xffffffff, /* src_mask */
279 0xffffffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
281
282 HOWTO (R_ARM_THM_SWI8, /* type */
283 0, /* rightshift */
284 0, /* size (0 = byte, 1 = short, 2 = long) */
285 0, /* bitsize */
286 FALSE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_signed,/* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_ARM_SWI8", /* name */
291 FALSE, /* partial_inplace */
292 0x00000000, /* src_mask */
293 0x00000000, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* BLX instruction for the ARM. */
297 HOWTO (R_ARM_XPC25, /* type */
298 2, /* rightshift */
299 2, /* size (0 = byte, 1 = short, 2 = long) */
300 24, /* bitsize */
301 TRUE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_signed,/* complain_on_overflow */
304 bfd_elf_generic_reloc, /* special_function */
305 "R_ARM_XPC25", /* name */
306 FALSE, /* partial_inplace */
307 0x00ffffff, /* src_mask */
308 0x00ffffff, /* dst_mask */
309 TRUE), /* pcrel_offset */
310
311 /* BLX instruction for the Thumb. */
312 HOWTO (R_ARM_THM_XPC22, /* type */
313 2, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 24, /* bitsize */
316 TRUE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_signed,/* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_ARM_THM_XPC22", /* name */
321 FALSE, /* partial_inplace */
322 0x07ff2fff, /* src_mask */
323 0x07ff2fff, /* dst_mask */
324 TRUE), /* pcrel_offset */
325
326 /* Dynamic TLS relocations. */
327
328 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 32, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield,/* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_ARM_TLS_DTPMOD32", /* name */
337 TRUE, /* partial_inplace */
338 0xffffffff, /* src_mask */
339 0xffffffff, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
343 0, /* rightshift */
344 2, /* size (0 = byte, 1 = short, 2 = long) */
345 32, /* bitsize */
346 FALSE, /* pc_relative */
347 0, /* bitpos */
348 complain_overflow_bitfield,/* complain_on_overflow */
349 bfd_elf_generic_reloc, /* special_function */
350 "R_ARM_TLS_DTPOFF32", /* name */
351 TRUE, /* partial_inplace */
352 0xffffffff, /* src_mask */
353 0xffffffff, /* dst_mask */
354 FALSE), /* pcrel_offset */
355
356 HOWTO (R_ARM_TLS_TPOFF32, /* type */
357 0, /* rightshift */
358 2, /* size (0 = byte, 1 = short, 2 = long) */
359 32, /* bitsize */
360 FALSE, /* pc_relative */
361 0, /* bitpos */
362 complain_overflow_bitfield,/* complain_on_overflow */
363 bfd_elf_generic_reloc, /* special_function */
364 "R_ARM_TLS_TPOFF32", /* name */
365 TRUE, /* partial_inplace */
366 0xffffffff, /* src_mask */
367 0xffffffff, /* dst_mask */
368 FALSE), /* pcrel_offset */
369
370 /* Relocs used in ARM Linux */
371
372 HOWTO (R_ARM_COPY, /* type */
373 0, /* rightshift */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
375 32, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_bitfield,/* complain_on_overflow */
379 bfd_elf_generic_reloc, /* special_function */
380 "R_ARM_COPY", /* name */
381 TRUE, /* partial_inplace */
382 0xffffffff, /* src_mask */
383 0xffffffff, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 HOWTO (R_ARM_GLOB_DAT, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 32, /* bitsize */
390 FALSE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_bitfield,/* complain_on_overflow */
393 bfd_elf_generic_reloc, /* special_function */
394 "R_ARM_GLOB_DAT", /* name */
395 TRUE, /* partial_inplace */
396 0xffffffff, /* src_mask */
397 0xffffffff, /* dst_mask */
398 FALSE), /* pcrel_offset */
399
400 HOWTO (R_ARM_JUMP_SLOT, /* type */
401 0, /* rightshift */
402 2, /* size (0 = byte, 1 = short, 2 = long) */
403 32, /* bitsize */
404 FALSE, /* pc_relative */
405 0, /* bitpos */
406 complain_overflow_bitfield,/* complain_on_overflow */
407 bfd_elf_generic_reloc, /* special_function */
408 "R_ARM_JUMP_SLOT", /* name */
409 TRUE, /* partial_inplace */
410 0xffffffff, /* src_mask */
411 0xffffffff, /* dst_mask */
412 FALSE), /* pcrel_offset */
413
414 HOWTO (R_ARM_RELATIVE, /* type */
415 0, /* rightshift */
416 2, /* size (0 = byte, 1 = short, 2 = long) */
417 32, /* bitsize */
418 FALSE, /* pc_relative */
419 0, /* bitpos */
420 complain_overflow_bitfield,/* complain_on_overflow */
421 bfd_elf_generic_reloc, /* special_function */
422 "R_ARM_RELATIVE", /* name */
423 TRUE, /* partial_inplace */
424 0xffffffff, /* src_mask */
425 0xffffffff, /* dst_mask */
426 FALSE), /* pcrel_offset */
427
428 HOWTO (R_ARM_GOTOFF32, /* type */
429 0, /* rightshift */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
431 32, /* bitsize */
432 FALSE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_bitfield,/* complain_on_overflow */
435 bfd_elf_generic_reloc, /* special_function */
436 "R_ARM_GOTOFF32", /* name */
437 TRUE, /* partial_inplace */
438 0xffffffff, /* src_mask */
439 0xffffffff, /* dst_mask */
440 FALSE), /* pcrel_offset */
441
442 HOWTO (R_ARM_GOTPC, /* type */
443 0, /* rightshift */
444 2, /* size (0 = byte, 1 = short, 2 = long) */
445 32, /* bitsize */
446 TRUE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_bitfield,/* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_ARM_GOTPC", /* name */
451 TRUE, /* partial_inplace */
452 0xffffffff, /* src_mask */
453 0xffffffff, /* dst_mask */
454 TRUE), /* pcrel_offset */
455
456 HOWTO (R_ARM_GOT32, /* type */
457 0, /* rightshift */
458 2, /* size (0 = byte, 1 = short, 2 = long) */
459 32, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_bitfield,/* complain_on_overflow */
463 bfd_elf_generic_reloc, /* special_function */
464 "R_ARM_GOT32", /* name */
465 TRUE, /* partial_inplace */
466 0xffffffff, /* src_mask */
467 0xffffffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 HOWTO (R_ARM_PLT32, /* type */
471 2, /* rightshift */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
473 24, /* bitsize */
474 TRUE, /* pc_relative */
475 0, /* bitpos */
476 complain_overflow_bitfield,/* complain_on_overflow */
477 bfd_elf_generic_reloc, /* special_function */
478 "R_ARM_PLT32", /* name */
479 FALSE, /* partial_inplace */
480 0x00ffffff, /* src_mask */
481 0x00ffffff, /* dst_mask */
482 TRUE), /* pcrel_offset */
483
484 HOWTO (R_ARM_CALL, /* type */
485 2, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 24, /* bitsize */
488 TRUE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_signed,/* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_ARM_CALL", /* name */
493 FALSE, /* partial_inplace */
494 0x00ffffff, /* src_mask */
495 0x00ffffff, /* dst_mask */
496 TRUE), /* pcrel_offset */
497
498 HOWTO (R_ARM_JUMP24, /* type */
499 2, /* rightshift */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
501 24, /* bitsize */
502 TRUE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_signed,/* complain_on_overflow */
505 bfd_elf_generic_reloc, /* special_function */
506 "R_ARM_JUMP24", /* name */
507 FALSE, /* partial_inplace */
508 0x00ffffff, /* src_mask */
509 0x00ffffff, /* dst_mask */
510 TRUE), /* pcrel_offset */
511
512 HOWTO (R_ARM_THM_JUMP24, /* type */
513 1, /* rightshift */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
515 24, /* bitsize */
516 TRUE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_signed,/* complain_on_overflow */
519 bfd_elf_generic_reloc, /* special_function */
520 "R_ARM_THM_JUMP24", /* name */
521 FALSE, /* partial_inplace */
522 0x07ff2fff, /* src_mask */
523 0x07ff2fff, /* dst_mask */
524 TRUE), /* pcrel_offset */
525
526 HOWTO (R_ARM_BASE_ABS, /* type */
527 0, /* rightshift */
528 2, /* size (0 = byte, 1 = short, 2 = long) */
529 32, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont,/* complain_on_overflow */
533 bfd_elf_generic_reloc, /* special_function */
534 "R_ARM_BASE_ABS", /* name */
535 FALSE, /* partial_inplace */
536 0xffffffff, /* src_mask */
537 0xffffffff, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 12, /* bitsize */
544 TRUE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont,/* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_ARM_ALU_PCREL_7_0", /* name */
549 FALSE, /* partial_inplace */
550 0x00000fff, /* src_mask */
551 0x00000fff, /* dst_mask */
552 TRUE), /* pcrel_offset */
553
554 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
555 0, /* rightshift */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
557 12, /* bitsize */
558 TRUE, /* pc_relative */
559 8, /* bitpos */
560 complain_overflow_dont,/* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_ARM_ALU_PCREL_15_8",/* name */
563 FALSE, /* partial_inplace */
564 0x00000fff, /* src_mask */
565 0x00000fff, /* dst_mask */
566 TRUE), /* pcrel_offset */
567
568 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
569 0, /* rightshift */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
571 12, /* bitsize */
572 TRUE, /* pc_relative */
573 16, /* bitpos */
574 complain_overflow_dont,/* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_ARM_ALU_PCREL_23_15",/* name */
577 FALSE, /* partial_inplace */
578 0x00000fff, /* src_mask */
579 0x00000fff, /* dst_mask */
580 TRUE), /* pcrel_offset */
581
582 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
583 0, /* rightshift */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
585 12, /* bitsize */
586 FALSE, /* pc_relative */
587 0, /* bitpos */
588 complain_overflow_dont,/* complain_on_overflow */
589 bfd_elf_generic_reloc, /* special_function */
590 "R_ARM_LDR_SBREL_11_0",/* name */
591 FALSE, /* partial_inplace */
592 0x00000fff, /* src_mask */
593 0x00000fff, /* dst_mask */
594 FALSE), /* pcrel_offset */
595
596 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 8, /* bitsize */
600 FALSE, /* pc_relative */
601 12, /* bitpos */
602 complain_overflow_dont,/* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_ARM_ALU_SBREL_19_12",/* name */
605 FALSE, /* partial_inplace */
606 0x000ff000, /* src_mask */
607 0x000ff000, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 8, /* bitsize */
614 FALSE, /* pc_relative */
615 20, /* bitpos */
616 complain_overflow_dont,/* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_ARM_ALU_SBREL_27_20",/* name */
619 FALSE, /* partial_inplace */
620 0x0ff00000, /* src_mask */
621 0x0ff00000, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 HOWTO (R_ARM_TARGET1, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_dont,/* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 "R_ARM_TARGET1", /* name */
633 FALSE, /* partial_inplace */
634 0xffffffff, /* src_mask */
635 0xffffffff, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 HOWTO (R_ARM_ROSEGREL32, /* type */
639 0, /* rightshift */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
641 32, /* bitsize */
642 FALSE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_dont,/* complain_on_overflow */
645 bfd_elf_generic_reloc, /* special_function */
646 "R_ARM_ROSEGREL32", /* name */
647 FALSE, /* partial_inplace */
648 0xffffffff, /* src_mask */
649 0xffffffff, /* dst_mask */
650 FALSE), /* pcrel_offset */
651
652 HOWTO (R_ARM_V4BX, /* type */
653 0, /* rightshift */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
655 32, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont,/* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 "R_ARM_V4BX", /* name */
661 FALSE, /* partial_inplace */
662 0xffffffff, /* src_mask */
663 0xffffffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 HOWTO (R_ARM_TARGET2, /* type */
667 0, /* rightshift */
668 2, /* size (0 = byte, 1 = short, 2 = long) */
669 32, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_signed,/* complain_on_overflow */
673 bfd_elf_generic_reloc, /* special_function */
674 "R_ARM_TARGET2", /* name */
675 FALSE, /* partial_inplace */
676 0xffffffff, /* src_mask */
677 0xffffffff, /* dst_mask */
678 TRUE), /* pcrel_offset */
679
680 HOWTO (R_ARM_PREL31, /* type */
681 0, /* rightshift */
682 2, /* size (0 = byte, 1 = short, 2 = long) */
683 31, /* bitsize */
684 TRUE, /* pc_relative */
685 0, /* bitpos */
686 complain_overflow_signed,/* complain_on_overflow */
687 bfd_elf_generic_reloc, /* special_function */
688 "R_ARM_PREL31", /* name */
689 FALSE, /* partial_inplace */
690 0x7fffffff, /* src_mask */
691 0x7fffffff, /* dst_mask */
692 TRUE), /* pcrel_offset */
693
694 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
695 0, /* rightshift */
696 2, /* size (0 = byte, 1 = short, 2 = long) */
697 16, /* bitsize */
698 FALSE, /* pc_relative */
699 0, /* bitpos */
700 complain_overflow_dont,/* complain_on_overflow */
701 bfd_elf_generic_reloc, /* special_function */
702 "R_ARM_MOVW_ABS_NC", /* name */
703 FALSE, /* partial_inplace */
704 0x000f0fff, /* src_mask */
705 0x000f0fff, /* dst_mask */
706 FALSE), /* pcrel_offset */
707
708 HOWTO (R_ARM_MOVT_ABS, /* type */
709 0, /* rightshift */
710 2, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_bitfield,/* complain_on_overflow */
715 bfd_elf_generic_reloc, /* special_function */
716 "R_ARM_MOVT_ABS", /* name */
717 FALSE, /* partial_inplace */
718 0x000f0fff, /* src_mask */
719 0x000f0fff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
723 0, /* rightshift */
724 2, /* size (0 = byte, 1 = short, 2 = long) */
725 16, /* bitsize */
726 TRUE, /* pc_relative */
727 0, /* bitpos */
728 complain_overflow_dont,/* complain_on_overflow */
729 bfd_elf_generic_reloc, /* special_function */
730 "R_ARM_MOVW_PREL_NC", /* name */
731 FALSE, /* partial_inplace */
732 0x000f0fff, /* src_mask */
733 0x000f0fff, /* dst_mask */
734 TRUE), /* pcrel_offset */
735
736 HOWTO (R_ARM_MOVT_PREL, /* type */
737 0, /* rightshift */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 TRUE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield,/* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_ARM_MOVT_PREL", /* name */
745 FALSE, /* partial_inplace */
746 0x000f0fff, /* src_mask */
747 0x000f0fff, /* dst_mask */
748 TRUE), /* pcrel_offset */
749
750 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
751 0, /* rightshift */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
753 16, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_dont,/* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_ARM_THM_MOVW_ABS_NC",/* name */
759 FALSE, /* partial_inplace */
760 0x040f70ff, /* src_mask */
761 0x040f70ff, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
765 0, /* rightshift */
766 2, /* size (0 = byte, 1 = short, 2 = long) */
767 16, /* bitsize */
768 FALSE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_bitfield,/* complain_on_overflow */
771 bfd_elf_generic_reloc, /* special_function */
772 "R_ARM_THM_MOVT_ABS", /* name */
773 FALSE, /* partial_inplace */
774 0x040f70ff, /* src_mask */
775 0x040f70ff, /* dst_mask */
776 FALSE), /* pcrel_offset */
777
778 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
779 0, /* rightshift */
780 2, /* size (0 = byte, 1 = short, 2 = long) */
781 16, /* bitsize */
782 TRUE, /* pc_relative */
783 0, /* bitpos */
784 complain_overflow_dont,/* complain_on_overflow */
785 bfd_elf_generic_reloc, /* special_function */
786 "R_ARM_THM_MOVW_PREL_NC",/* name */
787 FALSE, /* partial_inplace */
788 0x040f70ff, /* src_mask */
789 0x040f70ff, /* dst_mask */
790 TRUE), /* pcrel_offset */
791
792 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
793 0, /* rightshift */
794 2, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 TRUE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_bitfield,/* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_ARM_THM_MOVT_PREL", /* name */
801 FALSE, /* partial_inplace */
802 0x040f70ff, /* src_mask */
803 0x040f70ff, /* dst_mask */
804 TRUE), /* pcrel_offset */
805
806 HOWTO (R_ARM_THM_JUMP19, /* type */
807 1, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 19, /* bitsize */
810 TRUE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_signed,/* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_ARM_THM_JUMP19", /* name */
815 FALSE, /* partial_inplace */
816 0x043f2fff, /* src_mask */
817 0x043f2fff, /* dst_mask */
818 TRUE), /* pcrel_offset */
819
820 HOWTO (R_ARM_THM_JUMP6, /* type */
821 1, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 6, /* bitsize */
824 TRUE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_unsigned,/* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_ARM_THM_JUMP6", /* name */
829 FALSE, /* partial_inplace */
830 0x02f8, /* src_mask */
831 0x02f8, /* dst_mask */
832 TRUE), /* pcrel_offset */
833
834 /* These are declared as 13-bit signed relocations because we can
835 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
836 versa. */
837 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
838 0, /* rightshift */
839 2, /* size (0 = byte, 1 = short, 2 = long) */
840 13, /* bitsize */
841 TRUE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont,/* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_ARM_THM_ALU_PREL_11_0",/* name */
846 FALSE, /* partial_inplace */
847 0xffffffff, /* src_mask */
848 0xffffffff, /* dst_mask */
849 TRUE), /* pcrel_offset */
850
851 HOWTO (R_ARM_THM_PC12, /* type */
852 0, /* rightshift */
853 2, /* size (0 = byte, 1 = short, 2 = long) */
854 13, /* bitsize */
855 TRUE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont,/* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_ARM_THM_PC12", /* name */
860 FALSE, /* partial_inplace */
861 0xffffffff, /* src_mask */
862 0xffffffff, /* dst_mask */
863 TRUE), /* pcrel_offset */
864
865 HOWTO (R_ARM_ABS32_NOI, /* type */
866 0, /* rightshift */
867 2, /* size (0 = byte, 1 = short, 2 = long) */
868 32, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont,/* complain_on_overflow */
872 bfd_elf_generic_reloc, /* special_function */
873 "R_ARM_ABS32_NOI", /* name */
874 FALSE, /* partial_inplace */
875 0xffffffff, /* src_mask */
876 0xffffffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 HOWTO (R_ARM_REL32_NOI, /* type */
880 0, /* rightshift */
881 2, /* size (0 = byte, 1 = short, 2 = long) */
882 32, /* bitsize */
883 TRUE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont,/* complain_on_overflow */
886 bfd_elf_generic_reloc, /* special_function */
887 "R_ARM_REL32_NOI", /* name */
888 FALSE, /* partial_inplace */
889 0xffffffff, /* src_mask */
890 0xffffffff, /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* Group relocations. */
894
895 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
896 0, /* rightshift */
897 2, /* size (0 = byte, 1 = short, 2 = long) */
898 32, /* bitsize */
899 TRUE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont,/* complain_on_overflow */
902 bfd_elf_generic_reloc, /* special_function */
903 "R_ARM_ALU_PC_G0_NC", /* name */
904 FALSE, /* partial_inplace */
905 0xffffffff, /* src_mask */
906 0xffffffff, /* dst_mask */
907 TRUE), /* pcrel_offset */
908
909 HOWTO (R_ARM_ALU_PC_G0, /* type */
910 0, /* rightshift */
911 2, /* size (0 = byte, 1 = short, 2 = long) */
912 32, /* bitsize */
913 TRUE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont,/* complain_on_overflow */
916 bfd_elf_generic_reloc, /* special_function */
917 "R_ARM_ALU_PC_G0", /* name */
918 FALSE, /* partial_inplace */
919 0xffffffff, /* src_mask */
920 0xffffffff, /* dst_mask */
921 TRUE), /* pcrel_offset */
922
923 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
924 0, /* rightshift */
925 2, /* size (0 = byte, 1 = short, 2 = long) */
926 32, /* bitsize */
927 TRUE, /* pc_relative */
928 0, /* bitpos */
929 complain_overflow_dont,/* complain_on_overflow */
930 bfd_elf_generic_reloc, /* special_function */
931 "R_ARM_ALU_PC_G1_NC", /* name */
932 FALSE, /* partial_inplace */
933 0xffffffff, /* src_mask */
934 0xffffffff, /* dst_mask */
935 TRUE), /* pcrel_offset */
936
937 HOWTO (R_ARM_ALU_PC_G1, /* type */
938 0, /* rightshift */
939 2, /* size (0 = byte, 1 = short, 2 = long) */
940 32, /* bitsize */
941 TRUE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont,/* complain_on_overflow */
944 bfd_elf_generic_reloc, /* special_function */
945 "R_ARM_ALU_PC_G1", /* name */
946 FALSE, /* partial_inplace */
947 0xffffffff, /* src_mask */
948 0xffffffff, /* dst_mask */
949 TRUE), /* pcrel_offset */
950
951 HOWTO (R_ARM_ALU_PC_G2, /* type */
952 0, /* rightshift */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
954 32, /* bitsize */
955 TRUE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont,/* complain_on_overflow */
958 bfd_elf_generic_reloc, /* special_function */
959 "R_ARM_ALU_PC_G2", /* name */
960 FALSE, /* partial_inplace */
961 0xffffffff, /* src_mask */
962 0xffffffff, /* dst_mask */
963 TRUE), /* pcrel_offset */
964
965 HOWTO (R_ARM_LDR_PC_G1, /* type */
966 0, /* rightshift */
967 2, /* size (0 = byte, 1 = short, 2 = long) */
968 32, /* bitsize */
969 TRUE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont,/* complain_on_overflow */
972 bfd_elf_generic_reloc, /* special_function */
973 "R_ARM_LDR_PC_G1", /* name */
974 FALSE, /* partial_inplace */
975 0xffffffff, /* src_mask */
976 0xffffffff, /* dst_mask */
977 TRUE), /* pcrel_offset */
978
979 HOWTO (R_ARM_LDR_PC_G2, /* type */
980 0, /* rightshift */
981 2, /* size (0 = byte, 1 = short, 2 = long) */
982 32, /* bitsize */
983 TRUE, /* pc_relative */
984 0, /* bitpos */
985 complain_overflow_dont,/* complain_on_overflow */
986 bfd_elf_generic_reloc, /* special_function */
987 "R_ARM_LDR_PC_G2", /* name */
988 FALSE, /* partial_inplace */
989 0xffffffff, /* src_mask */
990 0xffffffff, /* dst_mask */
991 TRUE), /* pcrel_offset */
992
993 HOWTO (R_ARM_LDRS_PC_G0, /* type */
994 0, /* rightshift */
995 2, /* size (0 = byte, 1 = short, 2 = long) */
996 32, /* bitsize */
997 TRUE, /* pc_relative */
998 0, /* bitpos */
999 complain_overflow_dont,/* complain_on_overflow */
1000 bfd_elf_generic_reloc, /* special_function */
1001 "R_ARM_LDRS_PC_G0", /* name */
1002 FALSE, /* partial_inplace */
1003 0xffffffff, /* src_mask */
1004 0xffffffff, /* dst_mask */
1005 TRUE), /* pcrel_offset */
1006
1007 HOWTO (R_ARM_LDRS_PC_G1, /* type */
1008 0, /* rightshift */
1009 2, /* size (0 = byte, 1 = short, 2 = long) */
1010 32, /* bitsize */
1011 TRUE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_dont,/* complain_on_overflow */
1014 bfd_elf_generic_reloc, /* special_function */
1015 "R_ARM_LDRS_PC_G1", /* name */
1016 FALSE, /* partial_inplace */
1017 0xffffffff, /* src_mask */
1018 0xffffffff, /* dst_mask */
1019 TRUE), /* pcrel_offset */
1020
1021 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1022 0, /* rightshift */
1023 2, /* size (0 = byte, 1 = short, 2 = long) */
1024 32, /* bitsize */
1025 TRUE, /* pc_relative */
1026 0, /* bitpos */
1027 complain_overflow_dont,/* complain_on_overflow */
1028 bfd_elf_generic_reloc, /* special_function */
1029 "R_ARM_LDRS_PC_G2", /* name */
1030 FALSE, /* partial_inplace */
1031 0xffffffff, /* src_mask */
1032 0xffffffff, /* dst_mask */
1033 TRUE), /* pcrel_offset */
1034
1035 HOWTO (R_ARM_LDC_PC_G0, /* type */
1036 0, /* rightshift */
1037 2, /* size (0 = byte, 1 = short, 2 = long) */
1038 32, /* bitsize */
1039 TRUE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont,/* complain_on_overflow */
1042 bfd_elf_generic_reloc, /* special_function */
1043 "R_ARM_LDC_PC_G0", /* name */
1044 FALSE, /* partial_inplace */
1045 0xffffffff, /* src_mask */
1046 0xffffffff, /* dst_mask */
1047 TRUE), /* pcrel_offset */
1048
1049 HOWTO (R_ARM_LDC_PC_G1, /* type */
1050 0, /* rightshift */
1051 2, /* size (0 = byte, 1 = short, 2 = long) */
1052 32, /* bitsize */
1053 TRUE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_dont,/* complain_on_overflow */
1056 bfd_elf_generic_reloc, /* special_function */
1057 "R_ARM_LDC_PC_G1", /* name */
1058 FALSE, /* partial_inplace */
1059 0xffffffff, /* src_mask */
1060 0xffffffff, /* dst_mask */
1061 TRUE), /* pcrel_offset */
1062
1063 HOWTO (R_ARM_LDC_PC_G2, /* type */
1064 0, /* rightshift */
1065 2, /* size (0 = byte, 1 = short, 2 = long) */
1066 32, /* bitsize */
1067 TRUE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont,/* complain_on_overflow */
1070 bfd_elf_generic_reloc, /* special_function */
1071 "R_ARM_LDC_PC_G2", /* name */
1072 FALSE, /* partial_inplace */
1073 0xffffffff, /* src_mask */
1074 0xffffffff, /* dst_mask */
1075 TRUE), /* pcrel_offset */
1076
1077 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1078 0, /* rightshift */
1079 2, /* size (0 = byte, 1 = short, 2 = long) */
1080 32, /* bitsize */
1081 TRUE, /* pc_relative */
1082 0, /* bitpos */
1083 complain_overflow_dont,/* complain_on_overflow */
1084 bfd_elf_generic_reloc, /* special_function */
1085 "R_ARM_ALU_SB_G0_NC", /* name */
1086 FALSE, /* partial_inplace */
1087 0xffffffff, /* src_mask */
1088 0xffffffff, /* dst_mask */
1089 TRUE), /* pcrel_offset */
1090
1091 HOWTO (R_ARM_ALU_SB_G0, /* type */
1092 0, /* rightshift */
1093 2, /* size (0 = byte, 1 = short, 2 = long) */
1094 32, /* bitsize */
1095 TRUE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont,/* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 "R_ARM_ALU_SB_G0", /* name */
1100 FALSE, /* partial_inplace */
1101 0xffffffff, /* src_mask */
1102 0xffffffff, /* dst_mask */
1103 TRUE), /* pcrel_offset */
1104
1105 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1106 0, /* rightshift */
1107 2, /* size (0 = byte, 1 = short, 2 = long) */
1108 32, /* bitsize */
1109 TRUE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont,/* complain_on_overflow */
1112 bfd_elf_generic_reloc, /* special_function */
1113 "R_ARM_ALU_SB_G1_NC", /* name */
1114 FALSE, /* partial_inplace */
1115 0xffffffff, /* src_mask */
1116 0xffffffff, /* dst_mask */
1117 TRUE), /* pcrel_offset */
1118
1119 HOWTO (R_ARM_ALU_SB_G1, /* type */
1120 0, /* rightshift */
1121 2, /* size (0 = byte, 1 = short, 2 = long) */
1122 32, /* bitsize */
1123 TRUE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont,/* complain_on_overflow */
1126 bfd_elf_generic_reloc, /* special_function */
1127 "R_ARM_ALU_SB_G1", /* name */
1128 FALSE, /* partial_inplace */
1129 0xffffffff, /* src_mask */
1130 0xffffffff, /* dst_mask */
1131 TRUE), /* pcrel_offset */
1132
1133 HOWTO (R_ARM_ALU_SB_G2, /* type */
1134 0, /* rightshift */
1135 2, /* size (0 = byte, 1 = short, 2 = long) */
1136 32, /* bitsize */
1137 TRUE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont,/* complain_on_overflow */
1140 bfd_elf_generic_reloc, /* special_function */
1141 "R_ARM_ALU_SB_G2", /* name */
1142 FALSE, /* partial_inplace */
1143 0xffffffff, /* src_mask */
1144 0xffffffff, /* dst_mask */
1145 TRUE), /* pcrel_offset */
1146
1147 HOWTO (R_ARM_LDR_SB_G0, /* type */
1148 0, /* rightshift */
1149 2, /* size (0 = byte, 1 = short, 2 = long) */
1150 32, /* bitsize */
1151 TRUE, /* pc_relative */
1152 0, /* bitpos */
1153 complain_overflow_dont,/* complain_on_overflow */
1154 bfd_elf_generic_reloc, /* special_function */
1155 "R_ARM_LDR_SB_G0", /* name */
1156 FALSE, /* partial_inplace */
1157 0xffffffff, /* src_mask */
1158 0xffffffff, /* dst_mask */
1159 TRUE), /* pcrel_offset */
1160
1161 HOWTO (R_ARM_LDR_SB_G1, /* type */
1162 0, /* rightshift */
1163 2, /* size (0 = byte, 1 = short, 2 = long) */
1164 32, /* bitsize */
1165 TRUE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont,/* complain_on_overflow */
1168 bfd_elf_generic_reloc, /* special_function */
1169 "R_ARM_LDR_SB_G1", /* name */
1170 FALSE, /* partial_inplace */
1171 0xffffffff, /* src_mask */
1172 0xffffffff, /* dst_mask */
1173 TRUE), /* pcrel_offset */
1174
1175 HOWTO (R_ARM_LDR_SB_G2, /* type */
1176 0, /* rightshift */
1177 2, /* size (0 = byte, 1 = short, 2 = long) */
1178 32, /* bitsize */
1179 TRUE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_dont,/* complain_on_overflow */
1182 bfd_elf_generic_reloc, /* special_function */
1183 "R_ARM_LDR_SB_G2", /* name */
1184 FALSE, /* partial_inplace */
1185 0xffffffff, /* src_mask */
1186 0xffffffff, /* dst_mask */
1187 TRUE), /* pcrel_offset */
1188
1189 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1190 0, /* rightshift */
1191 2, /* size (0 = byte, 1 = short, 2 = long) */
1192 32, /* bitsize */
1193 TRUE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_dont,/* complain_on_overflow */
1196 bfd_elf_generic_reloc, /* special_function */
1197 "R_ARM_LDRS_SB_G0", /* name */
1198 FALSE, /* partial_inplace */
1199 0xffffffff, /* src_mask */
1200 0xffffffff, /* dst_mask */
1201 TRUE), /* pcrel_offset */
1202
1203 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1204 0, /* rightshift */
1205 2, /* size (0 = byte, 1 = short, 2 = long) */
1206 32, /* bitsize */
1207 TRUE, /* pc_relative */
1208 0, /* bitpos */
1209 complain_overflow_dont,/* complain_on_overflow */
1210 bfd_elf_generic_reloc, /* special_function */
1211 "R_ARM_LDRS_SB_G1", /* name */
1212 FALSE, /* partial_inplace */
1213 0xffffffff, /* src_mask */
1214 0xffffffff, /* dst_mask */
1215 TRUE), /* pcrel_offset */
1216
1217 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1218 0, /* rightshift */
1219 2, /* size (0 = byte, 1 = short, 2 = long) */
1220 32, /* bitsize */
1221 TRUE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont,/* complain_on_overflow */
1224 bfd_elf_generic_reloc, /* special_function */
1225 "R_ARM_LDRS_SB_G2", /* name */
1226 FALSE, /* partial_inplace */
1227 0xffffffff, /* src_mask */
1228 0xffffffff, /* dst_mask */
1229 TRUE), /* pcrel_offset */
1230
1231 HOWTO (R_ARM_LDC_SB_G0, /* type */
1232 0, /* rightshift */
1233 2, /* size (0 = byte, 1 = short, 2 = long) */
1234 32, /* bitsize */
1235 TRUE, /* pc_relative */
1236 0, /* bitpos */
1237 complain_overflow_dont,/* complain_on_overflow */
1238 bfd_elf_generic_reloc, /* special_function */
1239 "R_ARM_LDC_SB_G0", /* name */
1240 FALSE, /* partial_inplace */
1241 0xffffffff, /* src_mask */
1242 0xffffffff, /* dst_mask */
1243 TRUE), /* pcrel_offset */
1244
1245 HOWTO (R_ARM_LDC_SB_G1, /* type */
1246 0, /* rightshift */
1247 2, /* size (0 = byte, 1 = short, 2 = long) */
1248 32, /* bitsize */
1249 TRUE, /* pc_relative */
1250 0, /* bitpos */
1251 complain_overflow_dont,/* complain_on_overflow */
1252 bfd_elf_generic_reloc, /* special_function */
1253 "R_ARM_LDC_SB_G1", /* name */
1254 FALSE, /* partial_inplace */
1255 0xffffffff, /* src_mask */
1256 0xffffffff, /* dst_mask */
1257 TRUE), /* pcrel_offset */
1258
1259 HOWTO (R_ARM_LDC_SB_G2, /* type */
1260 0, /* rightshift */
1261 2, /* size (0 = byte, 1 = short, 2 = long) */
1262 32, /* bitsize */
1263 TRUE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont,/* complain_on_overflow */
1266 bfd_elf_generic_reloc, /* special_function */
1267 "R_ARM_LDC_SB_G2", /* name */
1268 FALSE, /* partial_inplace */
1269 0xffffffff, /* src_mask */
1270 0xffffffff, /* dst_mask */
1271 TRUE), /* pcrel_offset */
1272
1273 /* End of group relocations. */
1274
1275 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1276 0, /* rightshift */
1277 2, /* size (0 = byte, 1 = short, 2 = long) */
1278 16, /* bitsize */
1279 FALSE, /* pc_relative */
1280 0, /* bitpos */
1281 complain_overflow_dont,/* complain_on_overflow */
1282 bfd_elf_generic_reloc, /* special_function */
1283 "R_ARM_MOVW_BREL_NC", /* name */
1284 FALSE, /* partial_inplace */
1285 0x0000ffff, /* src_mask */
1286 0x0000ffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1288
1289 HOWTO (R_ARM_MOVT_BREL, /* type */
1290 0, /* rightshift */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_bitfield,/* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 "R_ARM_MOVT_BREL", /* name */
1298 FALSE, /* partial_inplace */
1299 0x0000ffff, /* src_mask */
1300 0x0000ffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 HOWTO (R_ARM_MOVW_BREL, /* type */
1304 0, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1306 16, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont,/* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 "R_ARM_MOVW_BREL", /* name */
1312 FALSE, /* partial_inplace */
1313 0x0000ffff, /* src_mask */
1314 0x0000ffff, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont,/* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_ARM_THM_MOVW_BREL_NC",/* name */
1326 FALSE, /* partial_inplace */
1327 0x040f70ff, /* src_mask */
1328 0x040f70ff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1332 0, /* rightshift */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_bitfield,/* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_ARM_THM_MOVT_BREL", /* name */
1340 FALSE, /* partial_inplace */
1341 0x040f70ff, /* src_mask */
1342 0x040f70ff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1346 0, /* rightshift */
1347 2, /* size (0 = byte, 1 = short, 2 = long) */
1348 16, /* bitsize */
1349 FALSE, /* pc_relative */
1350 0, /* bitpos */
1351 complain_overflow_dont,/* complain_on_overflow */
1352 bfd_elf_generic_reloc, /* special_function */
1353 "R_ARM_THM_MOVW_BREL", /* name */
1354 FALSE, /* partial_inplace */
1355 0x040f70ff, /* src_mask */
1356 0x040f70ff, /* dst_mask */
1357 FALSE), /* pcrel_offset */
1358
1359 HOWTO (R_ARM_TLS_GOTDESC, /* type */
1360 0, /* rightshift */
1361 2, /* size (0 = byte, 1 = short, 2 = long) */
1362 32, /* bitsize */
1363 FALSE, /* pc_relative */
1364 0, /* bitpos */
1365 complain_overflow_bitfield,/* complain_on_overflow */
1366 NULL, /* special_function */
1367 "R_ARM_TLS_GOTDESC", /* name */
1368 TRUE, /* partial_inplace */
1369 0xffffffff, /* src_mask */
1370 0xffffffff, /* dst_mask */
1371 FALSE), /* pcrel_offset */
1372
1373 HOWTO (R_ARM_TLS_CALL, /* type */
1374 0, /* rightshift */
1375 2, /* size (0 = byte, 1 = short, 2 = long) */
1376 24, /* bitsize */
1377 FALSE, /* pc_relative */
1378 0, /* bitpos */
1379 complain_overflow_dont,/* complain_on_overflow */
1380 bfd_elf_generic_reloc, /* special_function */
1381 "R_ARM_TLS_CALL", /* name */
1382 FALSE, /* partial_inplace */
1383 0x00ffffff, /* src_mask */
1384 0x00ffffff, /* dst_mask */
1385 FALSE), /* pcrel_offset */
1386
1387 HOWTO (R_ARM_TLS_DESCSEQ, /* type */
1388 0, /* rightshift */
1389 2, /* size (0 = byte, 1 = short, 2 = long) */
1390 0, /* bitsize */
1391 FALSE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_bitfield,/* complain_on_overflow */
1394 bfd_elf_generic_reloc, /* special_function */
1395 "R_ARM_TLS_DESCSEQ", /* name */
1396 FALSE, /* partial_inplace */
1397 0x00000000, /* src_mask */
1398 0x00000000, /* dst_mask */
1399 FALSE), /* pcrel_offset */
1400
1401 HOWTO (R_ARM_THM_TLS_CALL, /* type */
1402 0, /* rightshift */
1403 2, /* size (0 = byte, 1 = short, 2 = long) */
1404 24, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont,/* complain_on_overflow */
1408 bfd_elf_generic_reloc, /* special_function */
1409 "R_ARM_THM_TLS_CALL", /* name */
1410 FALSE, /* partial_inplace */
1411 0x07ff07ff, /* src_mask */
1412 0x07ff07ff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 HOWTO (R_ARM_PLT32_ABS, /* type */
1416 0, /* rightshift */
1417 2, /* size (0 = byte, 1 = short, 2 = long) */
1418 32, /* bitsize */
1419 FALSE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_dont,/* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_ARM_PLT32_ABS", /* name */
1424 FALSE, /* partial_inplace */
1425 0xffffffff, /* src_mask */
1426 0xffffffff, /* dst_mask */
1427 FALSE), /* pcrel_offset */
1428
1429 HOWTO (R_ARM_GOT_ABS, /* type */
1430 0, /* rightshift */
1431 2, /* size (0 = byte, 1 = short, 2 = long) */
1432 32, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_dont,/* complain_on_overflow */
1436 bfd_elf_generic_reloc, /* special_function */
1437 "R_ARM_GOT_ABS", /* name */
1438 FALSE, /* partial_inplace */
1439 0xffffffff, /* src_mask */
1440 0xffffffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 HOWTO (R_ARM_GOT_PREL, /* type */
1444 0, /* rightshift */
1445 2, /* size (0 = byte, 1 = short, 2 = long) */
1446 32, /* bitsize */
1447 TRUE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_dont, /* complain_on_overflow */
1450 bfd_elf_generic_reloc, /* special_function */
1451 "R_ARM_GOT_PREL", /* name */
1452 FALSE, /* partial_inplace */
1453 0xffffffff, /* src_mask */
1454 0xffffffff, /* dst_mask */
1455 TRUE), /* pcrel_offset */
1456
1457 HOWTO (R_ARM_GOT_BREL12, /* type */
1458 0, /* rightshift */
1459 2, /* size (0 = byte, 1 = short, 2 = long) */
1460 12, /* bitsize */
1461 FALSE, /* pc_relative */
1462 0, /* bitpos */
1463 complain_overflow_bitfield,/* complain_on_overflow */
1464 bfd_elf_generic_reloc, /* special_function */
1465 "R_ARM_GOT_BREL12", /* name */
1466 FALSE, /* partial_inplace */
1467 0x00000fff, /* src_mask */
1468 0x00000fff, /* dst_mask */
1469 FALSE), /* pcrel_offset */
1470
1471 HOWTO (R_ARM_GOTOFF12, /* type */
1472 0, /* rightshift */
1473 2, /* size (0 = byte, 1 = short, 2 = long) */
1474 12, /* bitsize */
1475 FALSE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_bitfield,/* complain_on_overflow */
1478 bfd_elf_generic_reloc, /* special_function */
1479 "R_ARM_GOTOFF12", /* name */
1480 FALSE, /* partial_inplace */
1481 0x00000fff, /* src_mask */
1482 0x00000fff, /* dst_mask */
1483 FALSE), /* pcrel_offset */
1484
1485 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1486
1487 /* GNU extension to record C++ vtable member usage */
1488 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1489 0, /* rightshift */
1490 2, /* size (0 = byte, 1 = short, 2 = long) */
1491 0, /* bitsize */
1492 FALSE, /* pc_relative */
1493 0, /* bitpos */
1494 complain_overflow_dont, /* complain_on_overflow */
1495 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1496 "R_ARM_GNU_VTENTRY", /* name */
1497 FALSE, /* partial_inplace */
1498 0, /* src_mask */
1499 0, /* dst_mask */
1500 FALSE), /* pcrel_offset */
1501
1502 /* GNU extension to record C++ vtable hierarchy */
1503 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1504 0, /* rightshift */
1505 2, /* size (0 = byte, 1 = short, 2 = long) */
1506 0, /* bitsize */
1507 FALSE, /* pc_relative */
1508 0, /* bitpos */
1509 complain_overflow_dont, /* complain_on_overflow */
1510 NULL, /* special_function */
1511 "R_ARM_GNU_VTINHERIT", /* name */
1512 FALSE, /* partial_inplace */
1513 0, /* src_mask */
1514 0, /* dst_mask */
1515 FALSE), /* pcrel_offset */
1516
1517 HOWTO (R_ARM_THM_JUMP11, /* type */
1518 1, /* rightshift */
1519 1, /* size (0 = byte, 1 = short, 2 = long) */
1520 11, /* bitsize */
1521 TRUE, /* pc_relative */
1522 0, /* bitpos */
1523 complain_overflow_signed, /* complain_on_overflow */
1524 bfd_elf_generic_reloc, /* special_function */
1525 "R_ARM_THM_JUMP11", /* name */
1526 FALSE, /* partial_inplace */
1527 0x000007ff, /* src_mask */
1528 0x000007ff, /* dst_mask */
1529 TRUE), /* pcrel_offset */
1530
1531 HOWTO (R_ARM_THM_JUMP8, /* type */
1532 1, /* rightshift */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1534 8, /* bitsize */
1535 TRUE, /* pc_relative */
1536 0, /* bitpos */
1537 complain_overflow_signed, /* complain_on_overflow */
1538 bfd_elf_generic_reloc, /* special_function */
1539 "R_ARM_THM_JUMP8", /* name */
1540 FALSE, /* partial_inplace */
1541 0x000000ff, /* src_mask */
1542 0x000000ff, /* dst_mask */
1543 TRUE), /* pcrel_offset */
1544
1545 /* TLS relocations */
1546 HOWTO (R_ARM_TLS_GD32, /* type */
1547 0, /* rightshift */
1548 2, /* size (0 = byte, 1 = short, 2 = long) */
1549 32, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_bitfield,/* complain_on_overflow */
1553 NULL, /* special_function */
1554 "R_ARM_TLS_GD32", /* name */
1555 TRUE, /* partial_inplace */
1556 0xffffffff, /* src_mask */
1557 0xffffffff, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 HOWTO (R_ARM_TLS_LDM32, /* type */
1561 0, /* rightshift */
1562 2, /* size (0 = byte, 1 = short, 2 = long) */
1563 32, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_bitfield,/* complain_on_overflow */
1567 bfd_elf_generic_reloc, /* special_function */
1568 "R_ARM_TLS_LDM32", /* name */
1569 TRUE, /* partial_inplace */
1570 0xffffffff, /* src_mask */
1571 0xffffffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 HOWTO (R_ARM_TLS_LDO32, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 32, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_bitfield,/* complain_on_overflow */
1581 bfd_elf_generic_reloc, /* special_function */
1582 "R_ARM_TLS_LDO32", /* name */
1583 TRUE, /* partial_inplace */
1584 0xffffffff, /* src_mask */
1585 0xffffffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 HOWTO (R_ARM_TLS_IE32, /* type */
1589 0, /* rightshift */
1590 2, /* size (0 = byte, 1 = short, 2 = long) */
1591 32, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_bitfield,/* complain_on_overflow */
1595 NULL, /* special_function */
1596 "R_ARM_TLS_IE32", /* name */
1597 TRUE, /* partial_inplace */
1598 0xffffffff, /* src_mask */
1599 0xffffffff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 HOWTO (R_ARM_TLS_LE32, /* type */
1603 0, /* rightshift */
1604 2, /* size (0 = byte, 1 = short, 2 = long) */
1605 32, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_bitfield,/* complain_on_overflow */
1609 NULL, /* special_function */
1610 "R_ARM_TLS_LE32", /* name */
1611 TRUE, /* partial_inplace */
1612 0xffffffff, /* src_mask */
1613 0xffffffff, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 HOWTO (R_ARM_TLS_LDO12, /* type */
1617 0, /* rightshift */
1618 2, /* size (0 = byte, 1 = short, 2 = long) */
1619 12, /* bitsize */
1620 FALSE, /* pc_relative */
1621 0, /* bitpos */
1622 complain_overflow_bitfield,/* complain_on_overflow */
1623 bfd_elf_generic_reloc, /* special_function */
1624 "R_ARM_TLS_LDO12", /* name */
1625 FALSE, /* partial_inplace */
1626 0x00000fff, /* src_mask */
1627 0x00000fff, /* dst_mask */
1628 FALSE), /* pcrel_offset */
1629
1630 HOWTO (R_ARM_TLS_LE12, /* type */
1631 0, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 12, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_bitfield,/* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_ARM_TLS_LE12", /* name */
1639 FALSE, /* partial_inplace */
1640 0x00000fff, /* src_mask */
1641 0x00000fff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 HOWTO (R_ARM_TLS_IE12GP, /* type */
1645 0, /* rightshift */
1646 2, /* size (0 = byte, 1 = short, 2 = long) */
1647 12, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_bitfield,/* complain_on_overflow */
1651 bfd_elf_generic_reloc, /* special_function */
1652 "R_ARM_TLS_IE12GP", /* name */
1653 FALSE, /* partial_inplace */
1654 0x00000fff, /* src_mask */
1655 0x00000fff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 /* 112-127 private relocations. */
1659 EMPTY_HOWTO (112),
1660 EMPTY_HOWTO (113),
1661 EMPTY_HOWTO (114),
1662 EMPTY_HOWTO (115),
1663 EMPTY_HOWTO (116),
1664 EMPTY_HOWTO (117),
1665 EMPTY_HOWTO (118),
1666 EMPTY_HOWTO (119),
1667 EMPTY_HOWTO (120),
1668 EMPTY_HOWTO (121),
1669 EMPTY_HOWTO (122),
1670 EMPTY_HOWTO (123),
1671 EMPTY_HOWTO (124),
1672 EMPTY_HOWTO (125),
1673 EMPTY_HOWTO (126),
1674 EMPTY_HOWTO (127),
1675
1676 /* R_ARM_ME_TOO, obsolete. */
1677 EMPTY_HOWTO (128),
1678
1679 HOWTO (R_ARM_THM_TLS_DESCSEQ, /* type */
1680 0, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 0, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_bitfield,/* complain_on_overflow */
1686 bfd_elf_generic_reloc, /* special_function */
1687 "R_ARM_THM_TLS_DESCSEQ",/* name */
1688 FALSE, /* partial_inplace */
1689 0x00000000, /* src_mask */
1690 0x00000000, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692 EMPTY_HOWTO (130),
1693 EMPTY_HOWTO (131),
1694 HOWTO (R_ARM_THM_ALU_ABS_G0_NC,/* type. */
1695 0, /* rightshift. */
1696 1, /* size (0 = byte, 1 = short, 2 = long). */
1697 16, /* bitsize. */
1698 FALSE, /* pc_relative. */
1699 0, /* bitpos. */
1700 complain_overflow_bitfield,/* complain_on_overflow. */
1701 bfd_elf_generic_reloc, /* special_function. */
1702 "R_ARM_THM_ALU_ABS_G0_NC",/* name. */
1703 FALSE, /* partial_inplace. */
1704 0x00000000, /* src_mask. */
1705 0x00000000, /* dst_mask. */
1706 FALSE), /* pcrel_offset. */
1707 HOWTO (R_ARM_THM_ALU_ABS_G1_NC,/* type. */
1708 0, /* rightshift. */
1709 1, /* size (0 = byte, 1 = short, 2 = long). */
1710 16, /* bitsize. */
1711 FALSE, /* pc_relative. */
1712 0, /* bitpos. */
1713 complain_overflow_bitfield,/* complain_on_overflow. */
1714 bfd_elf_generic_reloc, /* special_function. */
1715 "R_ARM_THM_ALU_ABS_G1_NC",/* name. */
1716 FALSE, /* partial_inplace. */
1717 0x00000000, /* src_mask. */
1718 0x00000000, /* dst_mask. */
1719 FALSE), /* pcrel_offset. */
1720 HOWTO (R_ARM_THM_ALU_ABS_G2_NC,/* type. */
1721 0, /* rightshift. */
1722 1, /* size (0 = byte, 1 = short, 2 = long). */
1723 16, /* bitsize. */
1724 FALSE, /* pc_relative. */
1725 0, /* bitpos. */
1726 complain_overflow_bitfield,/* complain_on_overflow. */
1727 bfd_elf_generic_reloc, /* special_function. */
1728 "R_ARM_THM_ALU_ABS_G2_NC",/* name. */
1729 FALSE, /* partial_inplace. */
1730 0x00000000, /* src_mask. */
1731 0x00000000, /* dst_mask. */
1732 FALSE), /* pcrel_offset. */
1733 HOWTO (R_ARM_THM_ALU_ABS_G3_NC,/* type. */
1734 0, /* rightshift. */
1735 1, /* size (0 = byte, 1 = short, 2 = long). */
1736 16, /* bitsize. */
1737 FALSE, /* pc_relative. */
1738 0, /* bitpos. */
1739 complain_overflow_bitfield,/* complain_on_overflow. */
1740 bfd_elf_generic_reloc, /* special_function. */
1741 "R_ARM_THM_ALU_ABS_G3_NC",/* name. */
1742 FALSE, /* partial_inplace. */
1743 0x00000000, /* src_mask. */
1744 0x00000000, /* dst_mask. */
1745 FALSE), /* pcrel_offset. */
1746 };
1747
1748 /* 160 onwards: */
1749 static reloc_howto_type elf32_arm_howto_table_2[1] =
1750 {
1751 HOWTO (R_ARM_IRELATIVE, /* type */
1752 0, /* rightshift */
1753 2, /* size (0 = byte, 1 = short, 2 = long) */
1754 32, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_bitfield,/* complain_on_overflow */
1758 bfd_elf_generic_reloc, /* special_function */
1759 "R_ARM_IRELATIVE", /* name */
1760 TRUE, /* partial_inplace */
1761 0xffffffff, /* src_mask */
1762 0xffffffff, /* dst_mask */
1763 FALSE) /* pcrel_offset */
1764 };
1765
1766 /* 249-255 extended, currently unused, relocations: */
1767 static reloc_howto_type elf32_arm_howto_table_3[4] =
1768 {
1769 HOWTO (R_ARM_RREL32, /* type */
1770 0, /* rightshift */
1771 0, /* size (0 = byte, 1 = short, 2 = long) */
1772 0, /* bitsize */
1773 FALSE, /* pc_relative */
1774 0, /* bitpos */
1775 complain_overflow_dont,/* complain_on_overflow */
1776 bfd_elf_generic_reloc, /* special_function */
1777 "R_ARM_RREL32", /* name */
1778 FALSE, /* partial_inplace */
1779 0, /* src_mask */
1780 0, /* dst_mask */
1781 FALSE), /* pcrel_offset */
1782
1783 HOWTO (R_ARM_RABS32, /* type */
1784 0, /* rightshift */
1785 0, /* size (0 = byte, 1 = short, 2 = long) */
1786 0, /* bitsize */
1787 FALSE, /* pc_relative */
1788 0, /* bitpos */
1789 complain_overflow_dont,/* complain_on_overflow */
1790 bfd_elf_generic_reloc, /* special_function */
1791 "R_ARM_RABS32", /* name */
1792 FALSE, /* partial_inplace */
1793 0, /* src_mask */
1794 0, /* dst_mask */
1795 FALSE), /* pcrel_offset */
1796
1797 HOWTO (R_ARM_RPC24, /* type */
1798 0, /* rightshift */
1799 0, /* size (0 = byte, 1 = short, 2 = long) */
1800 0, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
1803 complain_overflow_dont,/* complain_on_overflow */
1804 bfd_elf_generic_reloc, /* special_function */
1805 "R_ARM_RPC24", /* name */
1806 FALSE, /* partial_inplace */
1807 0, /* src_mask */
1808 0, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1810
1811 HOWTO (R_ARM_RBASE, /* type */
1812 0, /* rightshift */
1813 0, /* size (0 = byte, 1 = short, 2 = long) */
1814 0, /* bitsize */
1815 FALSE, /* pc_relative */
1816 0, /* bitpos */
1817 complain_overflow_dont,/* complain_on_overflow */
1818 bfd_elf_generic_reloc, /* special_function */
1819 "R_ARM_RBASE", /* name */
1820 FALSE, /* partial_inplace */
1821 0, /* src_mask */
1822 0, /* dst_mask */
1823 FALSE) /* pcrel_offset */
1824 };
1825
1826 static reloc_howto_type *
1827 elf32_arm_howto_from_type (unsigned int r_type)
1828 {
1829 if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
1830 return &elf32_arm_howto_table_1[r_type];
1831
1832 if (r_type == R_ARM_IRELATIVE)
1833 return &elf32_arm_howto_table_2[r_type - R_ARM_IRELATIVE];
1834
1835 if (r_type >= R_ARM_RREL32
1836 && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_3))
1837 return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32];
1838
1839 return NULL;
1840 }
1841
1842 static void
1843 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1844 Elf_Internal_Rela * elf_reloc)
1845 {
1846 unsigned int r_type;
1847
1848 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1849 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1850 }
1851
1852 struct elf32_arm_reloc_map
1853 {
1854 bfd_reloc_code_real_type bfd_reloc_val;
1855 unsigned char elf_reloc_val;
1856 };
1857
1858 /* All entries in this list must also be present in elf32_arm_howto_table. */
1859 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1860 {
1861 {BFD_RELOC_NONE, R_ARM_NONE},
1862 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1863 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1864 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1865 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1866 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1867 {BFD_RELOC_32, R_ARM_ABS32},
1868 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1869 {BFD_RELOC_8, R_ARM_ABS8},
1870 {BFD_RELOC_16, R_ARM_ABS16},
1871 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1872 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1873 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1874 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1875 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1876 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1877 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1878 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1879 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1880 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1881 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1882 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1883 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1884 {BFD_RELOC_ARM_GOT_PREL, R_ARM_GOT_PREL},
1885 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1886 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1887 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1888 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1889 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1890 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1891 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1892 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1893 {BFD_RELOC_ARM_TLS_GOTDESC, R_ARM_TLS_GOTDESC},
1894 {BFD_RELOC_ARM_TLS_CALL, R_ARM_TLS_CALL},
1895 {BFD_RELOC_ARM_THM_TLS_CALL, R_ARM_THM_TLS_CALL},
1896 {BFD_RELOC_ARM_TLS_DESCSEQ, R_ARM_TLS_DESCSEQ},
1897 {BFD_RELOC_ARM_THM_TLS_DESCSEQ, R_ARM_THM_TLS_DESCSEQ},
1898 {BFD_RELOC_ARM_TLS_DESC, R_ARM_TLS_DESC},
1899 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1900 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1901 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1902 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1903 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1904 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1905 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1906 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1907 {BFD_RELOC_ARM_IRELATIVE, R_ARM_IRELATIVE},
1908 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1909 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1910 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1911 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1912 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1913 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1914 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1915 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1916 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1917 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1918 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1919 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1920 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1921 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1922 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1923 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1924 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1925 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1926 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1927 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1928 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1929 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1930 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1931 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1932 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1933 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1934 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1935 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1936 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1937 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1938 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1939 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1940 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1941 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1942 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1943 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1944 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1945 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
1946 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX},
1947 {BFD_RELOC_ARM_THUMB_ALU_ABS_G3_NC, R_ARM_THM_ALU_ABS_G3_NC},
1948 {BFD_RELOC_ARM_THUMB_ALU_ABS_G2_NC, R_ARM_THM_ALU_ABS_G2_NC},
1949 {BFD_RELOC_ARM_THUMB_ALU_ABS_G1_NC, R_ARM_THM_ALU_ABS_G1_NC},
1950 {BFD_RELOC_ARM_THUMB_ALU_ABS_G0_NC, R_ARM_THM_ALU_ABS_G0_NC}
1951 };
1952
1953 static reloc_howto_type *
1954 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1955 bfd_reloc_code_real_type code)
1956 {
1957 unsigned int i;
1958
1959 for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++)
1960 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1961 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1962
1963 return NULL;
1964 }
1965
1966 static reloc_howto_type *
1967 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1968 const char *r_name)
1969 {
1970 unsigned int i;
1971
1972 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); i++)
1973 if (elf32_arm_howto_table_1[i].name != NULL
1974 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1975 return &elf32_arm_howto_table_1[i];
1976
1977 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++)
1978 if (elf32_arm_howto_table_2[i].name != NULL
1979 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1980 return &elf32_arm_howto_table_2[i];
1981
1982 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_3); i++)
1983 if (elf32_arm_howto_table_3[i].name != NULL
1984 && strcasecmp (elf32_arm_howto_table_3[i].name, r_name) == 0)
1985 return &elf32_arm_howto_table_3[i];
1986
1987 return NULL;
1988 }
1989
1990 /* Support for core dump NOTE sections. */
1991
1992 static bfd_boolean
1993 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1994 {
1995 int offset;
1996 size_t size;
1997
1998 switch (note->descsz)
1999 {
2000 default:
2001 return FALSE;
2002
2003 case 148: /* Linux/ARM 32-bit. */
2004 /* pr_cursig */
2005 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2006
2007 /* pr_pid */
2008 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2009
2010 /* pr_reg */
2011 offset = 72;
2012 size = 72;
2013
2014 break;
2015 }
2016
2017 /* Make a ".reg/999" section. */
2018 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2019 size, note->descpos + offset);
2020 }
2021
2022 static bfd_boolean
2023 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2024 {
2025 switch (note->descsz)
2026 {
2027 default:
2028 return FALSE;
2029
2030 case 124: /* Linux/ARM elf_prpsinfo. */
2031 elf_tdata (abfd)->core->pid
2032 = bfd_get_32 (abfd, note->descdata + 12);
2033 elf_tdata (abfd)->core->program
2034 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
2035 elf_tdata (abfd)->core->command
2036 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
2037 }
2038
2039 /* Note that for some reason, a spurious space is tacked
2040 onto the end of the args in some (at least one anyway)
2041 implementations, so strip it off if it exists. */
2042 {
2043 char *command = elf_tdata (abfd)->core->command;
2044 int n = strlen (command);
2045
2046 if (0 < n && command[n - 1] == ' ')
2047 command[n - 1] = '\0';
2048 }
2049
2050 return TRUE;
2051 }
2052
2053 static char *
2054 elf32_arm_nabi_write_core_note (bfd *abfd, char *buf, int *bufsiz,
2055 int note_type, ...)
2056 {
2057 switch (note_type)
2058 {
2059 default:
2060 return NULL;
2061
2062 case NT_PRPSINFO:
2063 {
2064 char data[124];
2065 va_list ap;
2066
2067 va_start (ap, note_type);
2068 memset (data, 0, sizeof (data));
2069 strncpy (data + 28, va_arg (ap, const char *), 16);
2070 strncpy (data + 44, va_arg (ap, const char *), 80);
2071 va_end (ap);
2072
2073 return elfcore_write_note (abfd, buf, bufsiz,
2074 "CORE", note_type, data, sizeof (data));
2075 }
2076
2077 case NT_PRSTATUS:
2078 {
2079 char data[148];
2080 va_list ap;
2081 long pid;
2082 int cursig;
2083 const void *greg;
2084
2085 va_start (ap, note_type);
2086 memset (data, 0, sizeof (data));
2087 pid = va_arg (ap, long);
2088 bfd_put_32 (abfd, pid, data + 24);
2089 cursig = va_arg (ap, int);
2090 bfd_put_16 (abfd, cursig, data + 12);
2091 greg = va_arg (ap, const void *);
2092 memcpy (data + 72, greg, 72);
2093 va_end (ap);
2094
2095 return elfcore_write_note (abfd, buf, bufsiz,
2096 "CORE", note_type, data, sizeof (data));
2097 }
2098 }
2099 }
2100
2101 #define TARGET_LITTLE_SYM arm_elf32_le_vec
2102 #define TARGET_LITTLE_NAME "elf32-littlearm"
2103 #define TARGET_BIG_SYM arm_elf32_be_vec
2104 #define TARGET_BIG_NAME "elf32-bigarm"
2105
2106 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
2107 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
2108 #define elf_backend_write_core_note elf32_arm_nabi_write_core_note
2109
2110 typedef unsigned long int insn32;
2111 typedef unsigned short int insn16;
2112
2113 /* In lieu of proper flags, assume all EABIv4 or later objects are
2114 interworkable. */
2115 #define INTERWORK_FLAG(abfd) \
2116 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
2117 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
2118 || ((abfd)->flags & BFD_LINKER_CREATED))
2119
2120 /* The linker script knows the section names for placement.
2121 The entry_names are used to do simple name mangling on the stubs.
2122 Given a function name, and its type, the stub can be found. The
2123 name can be changed. The only requirement is the %s be present. */
2124 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
2125 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
2126
2127 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
2128 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
2129
2130 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
2131 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
2132
2133 #define STM32L4XX_ERRATUM_VENEER_SECTION_NAME ".text.stm32l4xx_veneer"
2134 #define STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "__stm32l4xx_veneer_%x"
2135
2136 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
2137 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
2138
2139 #define STUB_ENTRY_NAME "__%s_veneer"
2140
2141 /* The name of the dynamic interpreter. This is put in the .interp
2142 section. */
2143 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
2144
2145 static const unsigned long tls_trampoline [] =
2146 {
2147 0xe08e0000, /* add r0, lr, r0 */
2148 0xe5901004, /* ldr r1, [r0,#4] */
2149 0xe12fff11, /* bx r1 */
2150 };
2151
2152 static const unsigned long dl_tlsdesc_lazy_trampoline [] =
2153 {
2154 0xe52d2004, /* push {r2} */
2155 0xe59f200c, /* ldr r2, [pc, #3f - . - 8] */
2156 0xe59f100c, /* ldr r1, [pc, #4f - . - 8] */
2157 0xe79f2002, /* 1: ldr r2, [pc, r2] */
2158 0xe081100f, /* 2: add r1, pc */
2159 0xe12fff12, /* bx r2 */
2160 0x00000014, /* 3: .word _GLOBAL_OFFSET_TABLE_ - 1b - 8
2161 + dl_tlsdesc_lazy_resolver(GOT) */
2162 0x00000018, /* 4: .word _GLOBAL_OFFSET_TABLE_ - 2b - 8 */
2163 };
2164
2165 #ifdef FOUR_WORD_PLT
2166
2167 /* The first entry in a procedure linkage table looks like
2168 this. It is set up so that any shared library function that is
2169 called before the relocation has been set up calls the dynamic
2170 linker first. */
2171 static const bfd_vma elf32_arm_plt0_entry [] =
2172 {
2173 0xe52de004, /* str lr, [sp, #-4]! */
2174 0xe59fe010, /* ldr lr, [pc, #16] */
2175 0xe08fe00e, /* add lr, pc, lr */
2176 0xe5bef008, /* ldr pc, [lr, #8]! */
2177 };
2178
2179 /* Subsequent entries in a procedure linkage table look like
2180 this. */
2181 static const bfd_vma elf32_arm_plt_entry [] =
2182 {
2183 0xe28fc600, /* add ip, pc, #NN */
2184 0xe28cca00, /* add ip, ip, #NN */
2185 0xe5bcf000, /* ldr pc, [ip, #NN]! */
2186 0x00000000, /* unused */
2187 };
2188
2189 #else /* not FOUR_WORD_PLT */
2190
2191 /* The first entry in a procedure linkage table looks like
2192 this. It is set up so that any shared library function that is
2193 called before the relocation has been set up calls the dynamic
2194 linker first. */
2195 static const bfd_vma elf32_arm_plt0_entry [] =
2196 {
2197 0xe52de004, /* str lr, [sp, #-4]! */
2198 0xe59fe004, /* ldr lr, [pc, #4] */
2199 0xe08fe00e, /* add lr, pc, lr */
2200 0xe5bef008, /* ldr pc, [lr, #8]! */
2201 0x00000000, /* &GOT[0] - . */
2202 };
2203
2204 /* By default subsequent entries in a procedure linkage table look like
2205 this. Offsets that don't fit into 28 bits will cause link error. */
2206 static const bfd_vma elf32_arm_plt_entry_short [] =
2207 {
2208 0xe28fc600, /* add ip, pc, #0xNN00000 */
2209 0xe28cca00, /* add ip, ip, #0xNN000 */
2210 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2211 };
2212
2213 /* When explicitly asked, we'll use this "long" entry format
2214 which can cope with arbitrary displacements. */
2215 static const bfd_vma elf32_arm_plt_entry_long [] =
2216 {
2217 0xe28fc200, /* add ip, pc, #0xN0000000 */
2218 0xe28cc600, /* add ip, ip, #0xNN00000 */
2219 0xe28cca00, /* add ip, ip, #0xNN000 */
2220 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
2221 };
2222
2223 static bfd_boolean elf32_arm_use_long_plt_entry = FALSE;
2224
2225 #endif /* not FOUR_WORD_PLT */
2226
2227 /* The first entry in a procedure linkage table looks like this.
2228 It is set up so that any shared library function that is called before the
2229 relocation has been set up calls the dynamic linker first. */
2230 static const bfd_vma elf32_thumb2_plt0_entry [] =
2231 {
2232 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2233 an instruction maybe encoded to one or two array elements. */
2234 0xf8dfb500, /* push {lr} */
2235 0x44fee008, /* ldr.w lr, [pc, #8] */
2236 /* add lr, pc */
2237 0xff08f85e, /* ldr.w pc, [lr, #8]! */
2238 0x00000000, /* &GOT[0] - . */
2239 };
2240
2241 /* Subsequent entries in a procedure linkage table for thumb only target
2242 look like this. */
2243 static const bfd_vma elf32_thumb2_plt_entry [] =
2244 {
2245 /* NOTE: As this is a mixture of 16-bit and 32-bit instructions,
2246 an instruction maybe encoded to one or two array elements. */
2247 0x0c00f240, /* movw ip, #0xNNNN */
2248 0x0c00f2c0, /* movt ip, #0xNNNN */
2249 0xf8dc44fc, /* add ip, pc */
2250 0xbf00f000 /* ldr.w pc, [ip] */
2251 /* nop */
2252 };
2253
2254 /* The format of the first entry in the procedure linkage table
2255 for a VxWorks executable. */
2256 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
2257 {
2258 0xe52dc008, /* str ip,[sp,#-8]! */
2259 0xe59fc000, /* ldr ip,[pc] */
2260 0xe59cf008, /* ldr pc,[ip,#8] */
2261 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
2262 };
2263
2264 /* The format of subsequent entries in a VxWorks executable. */
2265 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
2266 {
2267 0xe59fc000, /* ldr ip,[pc] */
2268 0xe59cf000, /* ldr pc,[ip] */
2269 0x00000000, /* .long @got */
2270 0xe59fc000, /* ldr ip,[pc] */
2271 0xea000000, /* b _PLT */
2272 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2273 };
2274
2275 /* The format of entries in a VxWorks shared library. */
2276 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
2277 {
2278 0xe59fc000, /* ldr ip,[pc] */
2279 0xe79cf009, /* ldr pc,[ip,r9] */
2280 0x00000000, /* .long @got */
2281 0xe59fc000, /* ldr ip,[pc] */
2282 0xe599f008, /* ldr pc,[r9,#8] */
2283 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
2284 };
2285
2286 /* An initial stub used if the PLT entry is referenced from Thumb code. */
2287 #define PLT_THUMB_STUB_SIZE 4
2288 static const bfd_vma elf32_arm_plt_thumb_stub [] =
2289 {
2290 0x4778, /* bx pc */
2291 0x46c0 /* nop */
2292 };
2293
2294 /* The entries in a PLT when using a DLL-based target with multiple
2295 address spaces. */
2296 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2297 {
2298 0xe51ff004, /* ldr pc, [pc, #-4] */
2299 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2300 };
2301
2302 /* The first entry in a procedure linkage table looks like
2303 this. It is set up so that any shared library function that is
2304 called before the relocation has been set up calls the dynamic
2305 linker first. */
2306 static const bfd_vma elf32_arm_nacl_plt0_entry [] =
2307 {
2308 /* First bundle: */
2309 0xe300c000, /* movw ip, #:lower16:&GOT[2]-.+8 */
2310 0xe340c000, /* movt ip, #:upper16:&GOT[2]-.+8 */
2311 0xe08cc00f, /* add ip, ip, pc */
2312 0xe52dc008, /* str ip, [sp, #-8]! */
2313 /* Second bundle: */
2314 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2315 0xe59cc000, /* ldr ip, [ip] */
2316 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2317 0xe12fff1c, /* bx ip */
2318 /* Third bundle: */
2319 0xe320f000, /* nop */
2320 0xe320f000, /* nop */
2321 0xe320f000, /* nop */
2322 /* .Lplt_tail: */
2323 0xe50dc004, /* str ip, [sp, #-4] */
2324 /* Fourth bundle: */
2325 0xe3ccc103, /* bic ip, ip, #0xc0000000 */
2326 0xe59cc000, /* ldr ip, [ip] */
2327 0xe3ccc13f, /* bic ip, ip, #0xc000000f */
2328 0xe12fff1c, /* bx ip */
2329 };
2330 #define ARM_NACL_PLT_TAIL_OFFSET (11 * 4)
2331
2332 /* Subsequent entries in a procedure linkage table look like this. */
2333 static const bfd_vma elf32_arm_nacl_plt_entry [] =
2334 {
2335 0xe300c000, /* movw ip, #:lower16:&GOT[n]-.+8 */
2336 0xe340c000, /* movt ip, #:upper16:&GOT[n]-.+8 */
2337 0xe08cc00f, /* add ip, ip, pc */
2338 0xea000000, /* b .Lplt_tail */
2339 };
2340
2341 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2342 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2343 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2344 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2345 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2346 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2347 #define THM2_MAX_FWD_COND_BRANCH_OFFSET (((1 << 20) -2) + 4)
2348 #define THM2_MAX_BWD_COND_BRANCH_OFFSET (-(1 << 20) + 4)
2349
2350 enum stub_insn_type
2351 {
2352 THUMB16_TYPE = 1,
2353 THUMB32_TYPE,
2354 ARM_TYPE,
2355 DATA_TYPE
2356 };
2357
2358 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2359 /* A bit of a hack. A Thumb conditional branch, in which the proper condition
2360 is inserted in arm_build_one_stub(). */
2361 #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1}
2362 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2363 #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)}
2364 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2365 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2366 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2367
2368 typedef struct
2369 {
2370 bfd_vma data;
2371 enum stub_insn_type type;
2372 unsigned int r_type;
2373 int reloc_addend;
2374 } insn_sequence;
2375
2376 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2377 to reach the stub if necessary. */
2378 static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
2379 {
2380 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2381 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2382 };
2383
2384 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2385 available. */
2386 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb[] =
2387 {
2388 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2389 ARM_INSN (0xe12fff1c), /* bx ip */
2390 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2391 };
2392
2393 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2394 static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] =
2395 {
2396 THUMB16_INSN (0xb401), /* push {r0} */
2397 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2398 THUMB16_INSN (0x4684), /* mov ip, r0 */
2399 THUMB16_INSN (0xbc01), /* pop {r0} */
2400 THUMB16_INSN (0x4760), /* bx ip */
2401 THUMB16_INSN (0xbf00), /* nop */
2402 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2403 };
2404
2405 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2406 allowed. */
2407 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
2408 {
2409 THUMB16_INSN (0x4778), /* bx pc */
2410 THUMB16_INSN (0x46c0), /* nop */
2411 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2412 ARM_INSN (0xe12fff1c), /* bx ip */
2413 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2414 };
2415
2416 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2417 available. */
2418 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
2419 {
2420 THUMB16_INSN (0x4778), /* bx pc */
2421 THUMB16_INSN (0x46c0), /* nop */
2422 ARM_INSN (0xe51ff004), /* ldr pc, [pc, #-4] */
2423 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2424 };
2425
2426 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2427 one, when the destination is close enough. */
2428 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
2429 {
2430 THUMB16_INSN (0x4778), /* bx pc */
2431 THUMB16_INSN (0x46c0), /* nop */
2432 ARM_REL_INSN (0xea000000, -8), /* b (X-8) */
2433 };
2434
2435 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2436 blx to reach the stub if necessary. */
2437 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic[] =
2438 {
2439 ARM_INSN (0xe59fc000), /* ldr ip, [pc] */
2440 ARM_INSN (0xe08ff00c), /* add pc, pc, ip */
2441 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2442 };
2443
2444 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2445 blx to reach the stub if necessary. We can not add into pc;
2446 it is not guaranteed to mode switch (different in ARMv6 and
2447 ARMv7). */
2448 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic[] =
2449 {
2450 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2451 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2452 ARM_INSN (0xe12fff1c), /* bx ip */
2453 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2454 };
2455
2456 /* V4T ARM -> ARM long branch stub, PIC. */
2457 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
2458 {
2459 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2460 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2461 ARM_INSN (0xe12fff1c), /* bx ip */
2462 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2463 };
2464
2465 /* V4T Thumb -> ARM long branch stub, PIC. */
2466 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
2467 {
2468 THUMB16_INSN (0x4778), /* bx pc */
2469 THUMB16_INSN (0x46c0), /* nop */
2470 ARM_INSN (0xe59fc000), /* ldr ip, [pc, #0] */
2471 ARM_INSN (0xe08cf00f), /* add pc, ip, pc */
2472 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2473 };
2474
2475 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2476 architectures. */
2477 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
2478 {
2479 THUMB16_INSN (0xb401), /* push {r0} */
2480 THUMB16_INSN (0x4802), /* ldr r0, [pc, #8] */
2481 THUMB16_INSN (0x46fc), /* mov ip, pc */
2482 THUMB16_INSN (0x4484), /* add ip, r0 */
2483 THUMB16_INSN (0xbc01), /* pop {r0} */
2484 THUMB16_INSN (0x4760), /* bx ip */
2485 DATA_WORD (0, R_ARM_REL32, 4), /* dcd R_ARM_REL32(X) */
2486 };
2487
2488 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2489 allowed. */
2490 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
2491 {
2492 THUMB16_INSN (0x4778), /* bx pc */
2493 THUMB16_INSN (0x46c0), /* nop */
2494 ARM_INSN (0xe59fc004), /* ldr ip, [pc, #4] */
2495 ARM_INSN (0xe08fc00c), /* add ip, pc, ip */
2496 ARM_INSN (0xe12fff1c), /* bx ip */
2497 DATA_WORD (0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2498 };
2499
2500 /* Thumb2/ARM -> TLS trampoline. Lowest common denominator, which is a
2501 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2502 static const insn_sequence elf32_arm_stub_long_branch_any_tls_pic[] =
2503 {
2504 ARM_INSN (0xe59f1000), /* ldr r1, [pc] */
2505 ARM_INSN (0xe08ff001), /* add pc, pc, r1 */
2506 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2507 };
2508
2509 /* V4T Thumb -> TLS trampoline. lowest common denominator, which is a
2510 long PIC stub. We can use r1 as a scratch -- and cannot use ip. */
2511 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_tls_pic[] =
2512 {
2513 THUMB16_INSN (0x4778), /* bx pc */
2514 THUMB16_INSN (0x46c0), /* nop */
2515 ARM_INSN (0xe59f1000), /* ldr r1, [pc, #0] */
2516 ARM_INSN (0xe081f00f), /* add pc, r1, pc */
2517 DATA_WORD (0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2518 };
2519
2520 /* NaCl ARM -> ARM long branch stub. */
2521 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl[] =
2522 {
2523 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2524 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2525 ARM_INSN (0xe12fff1c), /* bx ip */
2526 ARM_INSN (0xe320f000), /* nop */
2527 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2528 DATA_WORD (0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2529 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2530 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2531 };
2532
2533 /* NaCl ARM -> ARM long branch stub, PIC. */
2534 static const insn_sequence elf32_arm_stub_long_branch_arm_nacl_pic[] =
2535 {
2536 ARM_INSN (0xe59fc00c), /* ldr ip, [pc, #12] */
2537 ARM_INSN (0xe08cc00f), /* add ip, ip, pc */
2538 ARM_INSN (0xe3ccc13f), /* bic ip, ip, #0xc000000f */
2539 ARM_INSN (0xe12fff1c), /* bx ip */
2540 ARM_INSN (0xe125be70), /* bkpt 0x5be0 */
2541 DATA_WORD (0, R_ARM_REL32, 8), /* dcd R_ARM_REL32(X+8) */
2542 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2543 DATA_WORD (0, R_ARM_NONE, 0), /* .word 0 */
2544 };
2545
2546
2547 /* Cortex-A8 erratum-workaround stubs. */
2548
2549 /* Stub used for conditional branches (which may be beyond +/-1MB away, so we
2550 can't use a conditional branch to reach this stub). */
2551
2552 static const insn_sequence elf32_arm_stub_a8_veneer_b_cond[] =
2553 {
2554 THUMB16_BCOND_INSN (0xd001), /* b<cond>.n true. */
2555 THUMB32_B_INSN (0xf000b800, -4), /* b.w insn_after_original_branch. */
2556 THUMB32_B_INSN (0xf000b800, -4) /* true: b.w original_branch_dest. */
2557 };
2558
2559 /* Stub used for b.w and bl.w instructions. */
2560
2561 static const insn_sequence elf32_arm_stub_a8_veneer_b[] =
2562 {
2563 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2564 };
2565
2566 static const insn_sequence elf32_arm_stub_a8_veneer_bl[] =
2567 {
2568 THUMB32_B_INSN (0xf000b800, -4) /* b.w original_branch_dest. */
2569 };
2570
2571 /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w
2572 instruction (which switches to ARM mode) to point to this stub. Jump to the
2573 real destination using an ARM-mode branch. */
2574
2575 static const insn_sequence elf32_arm_stub_a8_veneer_blx[] =
2576 {
2577 ARM_REL_INSN (0xea000000, -8) /* b original_branch_dest. */
2578 };
2579
2580 /* For each section group there can be a specially created linker section
2581 to hold the stubs for that group. The name of the stub section is based
2582 upon the name of another section within that group with the suffix below
2583 applied.
2584
2585 PR 13049: STUB_SUFFIX used to be ".stub", but this allowed the user to
2586 create what appeared to be a linker stub section when it actually
2587 contained user code/data. For example, consider this fragment:
2588
2589 const char * stubborn_problems[] = { "np" };
2590
2591 If this is compiled with "-fPIC -fdata-sections" then gcc produces a
2592 section called:
2593
2594 .data.rel.local.stubborn_problems
2595
2596 This then causes problems in arm32_arm_build_stubs() as it triggers:
2597
2598 // Ignore non-stub sections.
2599 if (!strstr (stub_sec->name, STUB_SUFFIX))
2600 continue;
2601
2602 And so the section would be ignored instead of being processed. Hence
2603 the change in definition of STUB_SUFFIX to a name that cannot be a valid
2604 C identifier. */
2605 #define STUB_SUFFIX ".__stub"
2606
2607 /* One entry per long/short branch stub defined above. */
2608 #define DEF_STUBS \
2609 DEF_STUB(long_branch_any_any) \
2610 DEF_STUB(long_branch_v4t_arm_thumb) \
2611 DEF_STUB(long_branch_thumb_only) \
2612 DEF_STUB(long_branch_v4t_thumb_thumb) \
2613 DEF_STUB(long_branch_v4t_thumb_arm) \
2614 DEF_STUB(short_branch_v4t_thumb_arm) \
2615 DEF_STUB(long_branch_any_arm_pic) \
2616 DEF_STUB(long_branch_any_thumb_pic) \
2617 DEF_STUB(long_branch_v4t_thumb_thumb_pic) \
2618 DEF_STUB(long_branch_v4t_arm_thumb_pic) \
2619 DEF_STUB(long_branch_v4t_thumb_arm_pic) \
2620 DEF_STUB(long_branch_thumb_only_pic) \
2621 DEF_STUB(long_branch_any_tls_pic) \
2622 DEF_STUB(long_branch_v4t_thumb_tls_pic) \
2623 DEF_STUB(long_branch_arm_nacl) \
2624 DEF_STUB(long_branch_arm_nacl_pic) \
2625 DEF_STUB(a8_veneer_b_cond) \
2626 DEF_STUB(a8_veneer_b) \
2627 DEF_STUB(a8_veneer_bl) \
2628 DEF_STUB(a8_veneer_blx)
2629
2630 #define DEF_STUB(x) arm_stub_##x,
2631 enum elf32_arm_stub_type
2632 {
2633 arm_stub_none,
2634 DEF_STUBS
2635 /* Note the first a8_veneer type. */
2636 arm_stub_a8_veneer_lwm = arm_stub_a8_veneer_b_cond
2637 };
2638 #undef DEF_STUB
2639
2640 typedef struct
2641 {
2642 const insn_sequence* template_sequence;
2643 int template_size;
2644 } stub_def;
2645
2646 #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)},
2647 static const stub_def stub_definitions[] =
2648 {
2649 {NULL, 0},
2650 DEF_STUBS
2651 };
2652
2653 struct elf32_arm_stub_hash_entry
2654 {
2655 /* Base hash table entry structure. */
2656 struct bfd_hash_entry root;
2657
2658 /* The stub section. */
2659 asection *stub_sec;
2660
2661 /* Offset within stub_sec of the beginning of this stub. */
2662 bfd_vma stub_offset;
2663
2664 /* Given the symbol's value and its section we can determine its final
2665 value when building the stubs (so the stub knows where to jump). */
2666 bfd_vma target_value;
2667 asection *target_section;
2668
2669 /* Offset to apply to relocation referencing target_value. */
2670 bfd_vma target_addend;
2671
2672 /* The instruction which caused this stub to be generated (only valid for
2673 Cortex-A8 erratum workaround stubs at present). */
2674 unsigned long orig_insn;
2675
2676 /* The stub type. */
2677 enum elf32_arm_stub_type stub_type;
2678 /* Its encoding size in bytes. */
2679 int stub_size;
2680 /* Its template. */
2681 const insn_sequence *stub_template;
2682 /* The size of the template (number of entries). */
2683 int stub_template_size;
2684
2685 /* The symbol table entry, if any, that this was derived from. */
2686 struct elf32_arm_link_hash_entry *h;
2687
2688 /* Type of branch. */
2689 enum arm_st_branch_type branch_type;
2690
2691 /* Where this stub is being called from, or, in the case of combined
2692 stub sections, the first input section in the group. */
2693 asection *id_sec;
2694
2695 /* The name for the local symbol at the start of this stub. The
2696 stub name in the hash table has to be unique; this does not, so
2697 it can be friendlier. */
2698 char *output_name;
2699 };
2700
2701 /* Used to build a map of a section. This is required for mixed-endian
2702 code/data. */
2703
2704 typedef struct elf32_elf_section_map
2705 {
2706 bfd_vma vma;
2707 char type;
2708 }
2709 elf32_arm_section_map;
2710
2711 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2712
2713 typedef enum
2714 {
2715 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2716 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2717 VFP11_ERRATUM_ARM_VENEER,
2718 VFP11_ERRATUM_THUMB_VENEER
2719 }
2720 elf32_vfp11_erratum_type;
2721
2722 typedef struct elf32_vfp11_erratum_list
2723 {
2724 struct elf32_vfp11_erratum_list *next;
2725 bfd_vma vma;
2726 union
2727 {
2728 struct
2729 {
2730 struct elf32_vfp11_erratum_list *veneer;
2731 unsigned int vfp_insn;
2732 } b;
2733 struct
2734 {
2735 struct elf32_vfp11_erratum_list *branch;
2736 unsigned int id;
2737 } v;
2738 } u;
2739 elf32_vfp11_erratum_type type;
2740 }
2741 elf32_vfp11_erratum_list;
2742
2743 /* Information about a STM32L4XX erratum veneer, or a branch to such a
2744 veneer. */
2745 typedef enum
2746 {
2747 STM32L4XX_ERRATUM_BRANCH_TO_VENEER,
2748 STM32L4XX_ERRATUM_VENEER
2749 }
2750 elf32_stm32l4xx_erratum_type;
2751
2752 typedef struct elf32_stm32l4xx_erratum_list
2753 {
2754 struct elf32_stm32l4xx_erratum_list *next;
2755 bfd_vma vma;
2756 union
2757 {
2758 struct
2759 {
2760 struct elf32_stm32l4xx_erratum_list *veneer;
2761 unsigned int insn;
2762 } b;
2763 struct
2764 {
2765 struct elf32_stm32l4xx_erratum_list *branch;
2766 unsigned int id;
2767 } v;
2768 } u;
2769 elf32_stm32l4xx_erratum_type type;
2770 }
2771 elf32_stm32l4xx_erratum_list;
2772
2773 typedef enum
2774 {
2775 DELETE_EXIDX_ENTRY,
2776 INSERT_EXIDX_CANTUNWIND_AT_END
2777 }
2778 arm_unwind_edit_type;
2779
2780 /* A (sorted) list of edits to apply to an unwind table. */
2781 typedef struct arm_unwind_table_edit
2782 {
2783 arm_unwind_edit_type type;
2784 /* Note: we sometimes want to insert an unwind entry corresponding to a
2785 section different from the one we're currently writing out, so record the
2786 (text) section this edit relates to here. */
2787 asection *linked_section;
2788 unsigned int index;
2789 struct arm_unwind_table_edit *next;
2790 }
2791 arm_unwind_table_edit;
2792
2793 typedef struct _arm_elf_section_data
2794 {
2795 /* Information about mapping symbols. */
2796 struct bfd_elf_section_data elf;
2797 unsigned int mapcount;
2798 unsigned int mapsize;
2799 elf32_arm_section_map *map;
2800 /* Information about CPU errata. */
2801 unsigned int erratumcount;
2802 elf32_vfp11_erratum_list *erratumlist;
2803 unsigned int stm32l4xx_erratumcount;
2804 elf32_stm32l4xx_erratum_list *stm32l4xx_erratumlist;
2805 unsigned int additional_reloc_count;
2806 /* Information about unwind tables. */
2807 union
2808 {
2809 /* Unwind info attached to a text section. */
2810 struct
2811 {
2812 asection *arm_exidx_sec;
2813 } text;
2814
2815 /* Unwind info attached to an .ARM.exidx section. */
2816 struct
2817 {
2818 arm_unwind_table_edit *unwind_edit_list;
2819 arm_unwind_table_edit *unwind_edit_tail;
2820 } exidx;
2821 } u;
2822 }
2823 _arm_elf_section_data;
2824
2825 #define elf32_arm_section_data(sec) \
2826 ((_arm_elf_section_data *) elf_section_data (sec))
2827
2828 /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum.
2829 These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs),
2830 so may be created multiple times: we use an array of these entries whilst
2831 relaxing which we can refresh easily, then create stubs for each potentially
2832 erratum-triggering instruction once we've settled on a solution. */
2833
2834 struct a8_erratum_fix
2835 {
2836 bfd *input_bfd;
2837 asection *section;
2838 bfd_vma offset;
2839 bfd_vma addend;
2840 unsigned long orig_insn;
2841 char *stub_name;
2842 enum elf32_arm_stub_type stub_type;
2843 enum arm_st_branch_type branch_type;
2844 };
2845
2846 /* A table of relocs applied to branches which might trigger Cortex-A8
2847 erratum. */
2848
2849 struct a8_erratum_reloc
2850 {
2851 bfd_vma from;
2852 bfd_vma destination;
2853 struct elf32_arm_link_hash_entry *hash;
2854 const char *sym_name;
2855 unsigned int r_type;
2856 enum arm_st_branch_type branch_type;
2857 bfd_boolean non_a8_stub;
2858 };
2859
2860 /* The size of the thread control block. */
2861 #define TCB_SIZE 8
2862
2863 /* ARM-specific information about a PLT entry, over and above the usual
2864 gotplt_union. */
2865 struct arm_plt_info
2866 {
2867 /* We reference count Thumb references to a PLT entry separately,
2868 so that we can emit the Thumb trampoline only if needed. */
2869 bfd_signed_vma thumb_refcount;
2870
2871 /* Some references from Thumb code may be eliminated by BL->BLX
2872 conversion, so record them separately. */
2873 bfd_signed_vma maybe_thumb_refcount;
2874
2875 /* How many of the recorded PLT accesses were from non-call relocations.
2876 This information is useful when deciding whether anything takes the
2877 address of an STT_GNU_IFUNC PLT. A value of 0 means that all
2878 non-call references to the function should resolve directly to the
2879 real runtime target. */
2880 unsigned int noncall_refcount;
2881
2882 /* Since PLT entries have variable size if the Thumb prologue is
2883 used, we need to record the index into .got.plt instead of
2884 recomputing it from the PLT offset. */
2885 bfd_signed_vma got_offset;
2886 };
2887
2888 /* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */
2889 struct arm_local_iplt_info
2890 {
2891 /* The information that is usually found in the generic ELF part of
2892 the hash table entry. */
2893 union gotplt_union root;
2894
2895 /* The information that is usually found in the ARM-specific part of
2896 the hash table entry. */
2897 struct arm_plt_info arm;
2898
2899 /* A list of all potential dynamic relocations against this symbol. */
2900 struct elf_dyn_relocs *dyn_relocs;
2901 };
2902
2903 struct elf_arm_obj_tdata
2904 {
2905 struct elf_obj_tdata root;
2906
2907 /* tls_type for each local got entry. */
2908 char *local_got_tls_type;
2909
2910 /* GOTPLT entries for TLS descriptors. */
2911 bfd_vma *local_tlsdesc_gotent;
2912
2913 /* Information for local symbols that need entries in .iplt. */
2914 struct arm_local_iplt_info **local_iplt;
2915
2916 /* Zero to warn when linking objects with incompatible enum sizes. */
2917 int no_enum_size_warning;
2918
2919 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2920 int no_wchar_size_warning;
2921 };
2922
2923 #define elf_arm_tdata(bfd) \
2924 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2925
2926 #define elf32_arm_local_got_tls_type(bfd) \
2927 (elf_arm_tdata (bfd)->local_got_tls_type)
2928
2929 #define elf32_arm_local_tlsdesc_gotent(bfd) \
2930 (elf_arm_tdata (bfd)->local_tlsdesc_gotent)
2931
2932 #define elf32_arm_local_iplt(bfd) \
2933 (elf_arm_tdata (bfd)->local_iplt)
2934
2935 #define is_arm_elf(bfd) \
2936 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2937 && elf_tdata (bfd) != NULL \
2938 && elf_object_id (bfd) == ARM_ELF_DATA)
2939
2940 static bfd_boolean
2941 elf32_arm_mkobject (bfd *abfd)
2942 {
2943 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2944 ARM_ELF_DATA);
2945 }
2946
2947 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2948
2949 /* Arm ELF linker hash entry. */
2950 struct elf32_arm_link_hash_entry
2951 {
2952 struct elf_link_hash_entry root;
2953
2954 /* Track dynamic relocs copied for this symbol. */
2955 struct elf_dyn_relocs *dyn_relocs;
2956
2957 /* ARM-specific PLT information. */
2958 struct arm_plt_info plt;
2959
2960 #define GOT_UNKNOWN 0
2961 #define GOT_NORMAL 1
2962 #define GOT_TLS_GD 2
2963 #define GOT_TLS_IE 4
2964 #define GOT_TLS_GDESC 8
2965 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC))
2966 unsigned int tls_type : 8;
2967
2968 /* True if the symbol's PLT entry is in .iplt rather than .plt. */
2969 unsigned int is_iplt : 1;
2970
2971 unsigned int unused : 23;
2972
2973 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
2974 starting at the end of the jump table. */
2975 bfd_vma tlsdesc_got;
2976
2977 /* The symbol marking the real symbol location for exported thumb
2978 symbols with Arm stubs. */
2979 struct elf_link_hash_entry *export_glue;
2980
2981 /* A pointer to the most recently used stub hash entry against this
2982 symbol. */
2983 struct elf32_arm_stub_hash_entry *stub_cache;
2984 };
2985
2986 /* Traverse an arm ELF linker hash table. */
2987 #define elf32_arm_link_hash_traverse(table, func, info) \
2988 (elf_link_hash_traverse \
2989 (&(table)->root, \
2990 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2991 (info)))
2992
2993 /* Get the ARM elf linker hash table from a link_info structure. */
2994 #define elf32_arm_hash_table(info) \
2995 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
2996 == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL)
2997
2998 #define arm_stub_hash_lookup(table, string, create, copy) \
2999 ((struct elf32_arm_stub_hash_entry *) \
3000 bfd_hash_lookup ((table), (string), (create), (copy)))
3001
3002 /* Array to keep track of which stub sections have been created, and
3003 information on stub grouping. */
3004 struct map_stub
3005 {
3006 /* This is the section to which stubs in the group will be
3007 attached. */
3008 asection *link_sec;
3009 /* The stub section. */
3010 asection *stub_sec;
3011 };
3012
3013 #define elf32_arm_compute_jump_table_size(htab) \
3014 ((htab)->next_tls_desc_index * 4)
3015
3016 /* ARM ELF linker hash table. */
3017 struct elf32_arm_link_hash_table
3018 {
3019 /* The main hash table. */
3020 struct elf_link_hash_table root;
3021
3022 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
3023 bfd_size_type thumb_glue_size;
3024
3025 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
3026 bfd_size_type arm_glue_size;
3027
3028 /* The size in bytes of section containing the ARMv4 BX veneers. */
3029 bfd_size_type bx_glue_size;
3030
3031 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
3032 veneer has been populated. */
3033 bfd_vma bx_glue_offset[15];
3034
3035 /* The size in bytes of the section containing glue for VFP11 erratum
3036 veneers. */
3037 bfd_size_type vfp11_erratum_glue_size;
3038
3039 /* The size in bytes of the section containing glue for STM32L4XX erratum
3040 veneers. */
3041 bfd_size_type stm32l4xx_erratum_glue_size;
3042
3043 /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This
3044 holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and
3045 elf32_arm_write_section(). */
3046 struct a8_erratum_fix *a8_erratum_fixes;
3047 unsigned int num_a8_erratum_fixes;
3048
3049 /* An arbitrary input BFD chosen to hold the glue sections. */
3050 bfd * bfd_of_glue_owner;
3051
3052 /* Nonzero to output a BE8 image. */
3053 int byteswap_code;
3054
3055 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
3056 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
3057 int target1_is_rel;
3058
3059 /* The relocation to use for R_ARM_TARGET2 relocations. */
3060 int target2_reloc;
3061
3062 /* 0 = Ignore R_ARM_V4BX.
3063 1 = Convert BX to MOV PC.
3064 2 = Generate v4 interworing stubs. */
3065 int fix_v4bx;
3066
3067 /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */
3068 int fix_cortex_a8;
3069
3070 /* Whether we should fix the ARM1176 BLX immediate issue. */
3071 int fix_arm1176;
3072
3073 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
3074 int use_blx;
3075
3076 /* What sort of code sequences we should look for which may trigger the
3077 VFP11 denorm erratum. */
3078 bfd_arm_vfp11_fix vfp11_fix;
3079
3080 /* Global counter for the number of fixes we have emitted. */
3081 int num_vfp11_fixes;
3082
3083 /* What sort of code sequences we should look for which may trigger the
3084 STM32L4XX erratum. */
3085 bfd_arm_stm32l4xx_fix stm32l4xx_fix;
3086
3087 /* Global counter for the number of fixes we have emitted. */
3088 int num_stm32l4xx_fixes;
3089
3090 /* Nonzero to force PIC branch veneers. */
3091 int pic_veneer;
3092
3093 /* The number of bytes in the initial entry in the PLT. */
3094 bfd_size_type plt_header_size;
3095
3096 /* The number of bytes in the subsequent PLT etries. */
3097 bfd_size_type plt_entry_size;
3098
3099 /* True if the target system is VxWorks. */
3100 int vxworks_p;
3101
3102 /* True if the target system is Symbian OS. */
3103 int symbian_p;
3104
3105 /* True if the target system is Native Client. */
3106 int nacl_p;
3107
3108 /* True if the target uses REL relocations. */
3109 int use_rel;
3110
3111 /* The index of the next unused R_ARM_TLS_DESC slot in .rel.plt. */
3112 bfd_vma next_tls_desc_index;
3113
3114 /* How many R_ARM_TLS_DESC relocations were generated so far. */
3115 bfd_vma num_tls_desc;
3116
3117 /* Short-cuts to get to dynamic linker sections. */
3118 asection *sdynbss;
3119 asection *srelbss;
3120
3121 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
3122 asection *srelplt2;
3123
3124 /* The offset into splt of the PLT entry for the TLS descriptor
3125 resolver. Special values are 0, if not necessary (or not found
3126 to be necessary yet), and -1 if needed but not determined
3127 yet. */
3128 bfd_vma dt_tlsdesc_plt;
3129
3130 /* The offset into sgot of the GOT entry used by the PLT entry
3131 above. */
3132 bfd_vma dt_tlsdesc_got;
3133
3134 /* Offset in .plt section of tls_arm_trampoline. */
3135 bfd_vma tls_trampoline;
3136
3137 /* Data for R_ARM_TLS_LDM32 relocations. */
3138 union
3139 {
3140 bfd_signed_vma refcount;
3141 bfd_vma offset;
3142 } tls_ldm_got;
3143
3144 /* Small local sym cache. */
3145 struct sym_cache sym_cache;
3146
3147 /* For convenience in allocate_dynrelocs. */
3148 bfd * obfd;
3149
3150 /* The amount of space used by the reserved portion of the sgotplt
3151 section, plus whatever space is used by the jump slots. */
3152 bfd_vma sgotplt_jump_table_size;
3153
3154 /* The stub hash table. */
3155 struct bfd_hash_table stub_hash_table;
3156
3157 /* Linker stub bfd. */
3158 bfd *stub_bfd;
3159
3160 /* Linker call-backs. */
3161 asection * (*add_stub_section) (const char *, asection *, unsigned int);
3162 void (*layout_sections_again) (void);
3163
3164 /* Array to keep track of which stub sections have been created, and
3165 information on stub grouping. */
3166 struct map_stub *stub_group;
3167
3168 /* Number of elements in stub_group. */
3169 unsigned int top_id;
3170
3171 /* Assorted information used by elf32_arm_size_stubs. */
3172 unsigned int bfd_count;
3173 unsigned int top_index;
3174 asection **input_list;
3175 };
3176
3177 static inline int
3178 ctz (unsigned int mask)
3179 {
3180 #if GCC_VERSION >= 3004
3181 return __builtin_ctz (mask);
3182 #else
3183 unsigned int i;
3184
3185 for (i = 0; i < 8 * sizeof (mask); i++)
3186 {
3187 if (mask & 0x1)
3188 break;
3189 mask = (mask >> 1);
3190 }
3191 return i;
3192 #endif
3193 }
3194
3195 static inline int
3196 popcount (unsigned int mask)
3197 {
3198 #if GCC_VERSION >= 3004
3199 return __builtin_popcount (mask);
3200 #else
3201 unsigned int i, sum = 0;
3202
3203 for (i = 0; i < 8 * sizeof (mask); i++)
3204 {
3205 if (mask & 0x1)
3206 sum++;
3207 mask = (mask >> 1);
3208 }
3209 return sum;
3210 #endif
3211 }
3212
3213 /* Create an entry in an ARM ELF linker hash table. */
3214
3215 static struct bfd_hash_entry *
3216 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
3217 struct bfd_hash_table * table,
3218 const char * string)
3219 {
3220 struct elf32_arm_link_hash_entry * ret =
3221 (struct elf32_arm_link_hash_entry *) entry;
3222
3223 /* Allocate the structure if it has not already been allocated by a
3224 subclass. */
3225 if (ret == NULL)
3226 ret = (struct elf32_arm_link_hash_entry *)
3227 bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
3228 if (ret == NULL)
3229 return (struct bfd_hash_entry *) ret;
3230
3231 /* Call the allocation method of the superclass. */
3232 ret = ((struct elf32_arm_link_hash_entry *)
3233 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3234 table, string));
3235 if (ret != NULL)
3236 {
3237 ret->dyn_relocs = NULL;
3238 ret->tls_type = GOT_UNKNOWN;
3239 ret->tlsdesc_got = (bfd_vma) -1;
3240 ret->plt.thumb_refcount = 0;
3241 ret->plt.maybe_thumb_refcount = 0;
3242 ret->plt.noncall_refcount = 0;
3243 ret->plt.got_offset = -1;
3244 ret->is_iplt = FALSE;
3245 ret->export_glue = NULL;
3246
3247 ret->stub_cache = NULL;
3248 }
3249
3250 return (struct bfd_hash_entry *) ret;
3251 }
3252
3253 /* Ensure that we have allocated bookkeeping structures for ABFD's local
3254 symbols. */
3255
3256 static bfd_boolean
3257 elf32_arm_allocate_local_sym_info (bfd *abfd)
3258 {
3259 if (elf_local_got_refcounts (abfd) == NULL)
3260 {
3261 bfd_size_type num_syms;
3262 bfd_size_type size;
3263 char *data;
3264
3265 num_syms = elf_tdata (abfd)->symtab_hdr.sh_info;
3266 size = num_syms * (sizeof (bfd_signed_vma)
3267 + sizeof (struct arm_local_iplt_info *)
3268 + sizeof (bfd_vma)
3269 + sizeof (char));
3270 data = bfd_zalloc (abfd, size);
3271 if (data == NULL)
3272 return FALSE;
3273
3274 elf_local_got_refcounts (abfd) = (bfd_signed_vma *) data;
3275 data += num_syms * sizeof (bfd_signed_vma);
3276
3277 elf32_arm_local_iplt (abfd) = (struct arm_local_iplt_info **) data;
3278 data += num_syms * sizeof (struct arm_local_iplt_info *);
3279
3280 elf32_arm_local_tlsdesc_gotent (abfd) = (bfd_vma *) data;
3281 data += num_syms * sizeof (bfd_vma);
3282
3283 elf32_arm_local_got_tls_type (abfd) = data;
3284 }
3285 return TRUE;
3286 }
3287
3288 /* Return the .iplt information for local symbol R_SYMNDX, which belongs
3289 to input bfd ABFD. Create the information if it doesn't already exist.
3290 Return null if an allocation fails. */
3291
3292 static struct arm_local_iplt_info *
3293 elf32_arm_create_local_iplt (bfd *abfd, unsigned long r_symndx)
3294 {
3295 struct arm_local_iplt_info **ptr;
3296
3297 if (!elf32_arm_allocate_local_sym_info (abfd))
3298 return NULL;
3299
3300 BFD_ASSERT (r_symndx < elf_tdata (abfd)->symtab_hdr.sh_info);
3301 ptr = &elf32_arm_local_iplt (abfd)[r_symndx];
3302 if (*ptr == NULL)
3303 *ptr = bfd_zalloc (abfd, sizeof (**ptr));
3304 return *ptr;
3305 }
3306
3307 /* Try to obtain PLT information for the symbol with index R_SYMNDX
3308 in ABFD's symbol table. If the symbol is global, H points to its
3309 hash table entry, otherwise H is null.
3310
3311 Return true if the symbol does have PLT information. When returning
3312 true, point *ROOT_PLT at the target-independent reference count/offset
3313 union and *ARM_PLT at the ARM-specific information. */
3314
3315 static bfd_boolean
3316 elf32_arm_get_plt_info (bfd *abfd, struct elf32_arm_link_hash_entry *h,
3317 unsigned long r_symndx, union gotplt_union **root_plt,
3318 struct arm_plt_info **arm_plt)
3319 {
3320 struct arm_local_iplt_info *local_iplt;
3321
3322 if (h != NULL)
3323 {
3324 *root_plt = &h->root.plt;
3325 *arm_plt = &h->plt;
3326 return TRUE;
3327 }
3328
3329 if (elf32_arm_local_iplt (abfd) == NULL)
3330 return FALSE;
3331
3332 local_iplt = elf32_arm_local_iplt (abfd)[r_symndx];
3333 if (local_iplt == NULL)
3334 return FALSE;
3335
3336 *root_plt = &local_iplt->root;
3337 *arm_plt = &local_iplt->arm;
3338 return TRUE;
3339 }
3340
3341 /* Return true if the PLT described by ARM_PLT requires a Thumb stub
3342 before it. */
3343
3344 static bfd_boolean
3345 elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info *info,
3346 struct arm_plt_info *arm_plt)
3347 {
3348 struct elf32_arm_link_hash_table *htab;
3349
3350 htab = elf32_arm_hash_table (info);
3351 return (arm_plt->thumb_refcount != 0
3352 || (!htab->use_blx && arm_plt->maybe_thumb_refcount != 0));
3353 }
3354
3355 /* Return a pointer to the head of the dynamic reloc list that should
3356 be used for local symbol ISYM, which is symbol number R_SYMNDX in
3357 ABFD's symbol table. Return null if an error occurs. */
3358
3359 static struct elf_dyn_relocs **
3360 elf32_arm_get_local_dynreloc_list (bfd *abfd, unsigned long r_symndx,
3361 Elf_Internal_Sym *isym)
3362 {
3363 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3364 {
3365 struct arm_local_iplt_info *local_iplt;
3366
3367 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
3368 if (local_iplt == NULL)
3369 return NULL;
3370 return &local_iplt->dyn_relocs;
3371 }
3372 else
3373 {
3374 /* Track dynamic relocs needed for local syms too.
3375 We really need local syms available to do this
3376 easily. Oh well. */
3377 asection *s;
3378 void *vpp;
3379
3380 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3381 if (s == NULL)
3382 abort ();
3383
3384 vpp = &elf_section_data (s)->local_dynrel;
3385 return (struct elf_dyn_relocs **) vpp;
3386 }
3387 }
3388
3389 /* Initialize an entry in the stub hash table. */
3390
3391 static struct bfd_hash_entry *
3392 stub_hash_newfunc (struct bfd_hash_entry *entry,
3393 struct bfd_hash_table *table,
3394 const char *string)
3395 {
3396 /* Allocate the structure if it has not already been allocated by a
3397 subclass. */
3398 if (entry == NULL)
3399 {
3400 entry = (struct bfd_hash_entry *)
3401 bfd_hash_allocate (table, sizeof (struct elf32_arm_stub_hash_entry));
3402 if (entry == NULL)
3403 return entry;
3404 }
3405
3406 /* Call the allocation method of the superclass. */
3407 entry = bfd_hash_newfunc (entry, table, string);
3408 if (entry != NULL)
3409 {
3410 struct elf32_arm_stub_hash_entry *eh;
3411
3412 /* Initialize the local fields. */
3413 eh = (struct elf32_arm_stub_hash_entry *) entry;
3414 eh->stub_sec = NULL;
3415 eh->stub_offset = 0;
3416 eh->target_value = 0;
3417 eh->target_section = NULL;
3418 eh->target_addend = 0;
3419 eh->orig_insn = 0;
3420 eh->stub_type = arm_stub_none;
3421 eh->stub_size = 0;
3422 eh->stub_template = NULL;
3423 eh->stub_template_size = 0;
3424 eh->h = NULL;
3425 eh->id_sec = NULL;
3426 eh->output_name = NULL;
3427 }
3428
3429 return entry;
3430 }
3431
3432 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
3433 shortcuts to them in our hash table. */
3434
3435 static bfd_boolean
3436 create_got_section (bfd *dynobj, struct bfd_link_info *info)
3437 {
3438 struct elf32_arm_link_hash_table *htab;
3439
3440 htab = elf32_arm_hash_table (info);
3441 if (htab == NULL)
3442 return FALSE;
3443
3444 /* BPABI objects never have a GOT, or associated sections. */
3445 if (htab->symbian_p)
3446 return TRUE;
3447
3448 if (! _bfd_elf_create_got_section (dynobj, info))
3449 return FALSE;
3450
3451 return TRUE;
3452 }
3453
3454 /* Create the .iplt, .rel(a).iplt and .igot.plt sections. */
3455
3456 static bfd_boolean
3457 create_ifunc_sections (struct bfd_link_info *info)
3458 {
3459 struct elf32_arm_link_hash_table *htab;
3460 const struct elf_backend_data *bed;
3461 bfd *dynobj;
3462 asection *s;
3463 flagword flags;
3464
3465 htab = elf32_arm_hash_table (info);
3466 dynobj = htab->root.dynobj;
3467 bed = get_elf_backend_data (dynobj);
3468 flags = bed->dynamic_sec_flags;
3469
3470 if (htab->root.iplt == NULL)
3471 {
3472 s = bfd_make_section_anyway_with_flags (dynobj, ".iplt",
3473 flags | SEC_READONLY | SEC_CODE);
3474 if (s == NULL
3475 || !bfd_set_section_alignment (dynobj, s, bed->plt_alignment))
3476 return FALSE;
3477 htab->root.iplt = s;
3478 }
3479
3480 if (htab->root.irelplt == NULL)
3481 {
3482 s = bfd_make_section_anyway_with_flags (dynobj,
3483 RELOC_SECTION (htab, ".iplt"),
3484 flags | SEC_READONLY);
3485 if (s == NULL
3486 || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
3487 return FALSE;
3488 htab->root.irelplt = s;
3489 }
3490
3491 if (htab->root.igotplt == NULL)
3492 {
3493 s = bfd_make_section_anyway_with_flags (dynobj, ".igot.plt", flags);
3494 if (s == NULL
3495 || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
3496 return FALSE;
3497 htab->root.igotplt = s;
3498 }
3499 return TRUE;
3500 }
3501
3502 /* Determine if we're dealing with a Thumb only architecture. */
3503
3504 static bfd_boolean
3505 using_thumb_only (struct elf32_arm_link_hash_table *globals)
3506 {
3507 int arch;
3508 int profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3509 Tag_CPU_arch_profile);
3510
3511 if (profile)
3512 return profile == 'M';
3513
3514 arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, Tag_CPU_arch);
3515
3516 if (arch == TAG_CPU_ARCH_V6_M
3517 || arch == TAG_CPU_ARCH_V6S_M
3518 || arch == TAG_CPU_ARCH_V7E_M
3519 || arch == TAG_CPU_ARCH_V8M_BASE
3520 || arch == TAG_CPU_ARCH_V8M_MAIN)
3521 return TRUE;
3522
3523 return FALSE;
3524 }
3525
3526 /* Determine if we're dealing with a Thumb-2 object. */
3527
3528 static bfd_boolean
3529 using_thumb2 (struct elf32_arm_link_hash_table *globals)
3530 {
3531 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3532 Tag_CPU_arch);
3533 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
3534 }
3535
3536 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
3537 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
3538 hash table. */
3539
3540 static bfd_boolean
3541 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3542 {
3543 struct elf32_arm_link_hash_table *htab;
3544
3545 htab = elf32_arm_hash_table (info);
3546 if (htab == NULL)
3547 return FALSE;
3548
3549 if (!htab->root.sgot && !create_got_section (dynobj, info))
3550 return FALSE;
3551
3552 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3553 return FALSE;
3554
3555 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
3556 if (!bfd_link_pic (info))
3557 htab->srelbss = bfd_get_linker_section (dynobj,
3558 RELOC_SECTION (htab, ".bss"));
3559
3560 if (htab->vxworks_p)
3561 {
3562 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
3563 return FALSE;
3564
3565 if (bfd_link_pic (info))
3566 {
3567 htab->plt_header_size = 0;
3568 htab->plt_entry_size
3569 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
3570 }
3571 else
3572 {
3573 htab->plt_header_size
3574 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
3575 htab->plt_entry_size
3576 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
3577 }
3578
3579 if (elf_elfheader (dynobj))
3580 elf_elfheader (dynobj)->e_ident[EI_CLASS] = ELFCLASS32;
3581 }
3582 else
3583 {
3584 /* PR ld/16017
3585 Test for thumb only architectures. Note - we cannot just call
3586 using_thumb_only() as the attributes in the output bfd have not been
3587 initialised at this point, so instead we use the input bfd. */
3588 bfd * saved_obfd = htab->obfd;
3589
3590 htab->obfd = dynobj;
3591 if (using_thumb_only (htab))
3592 {
3593 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
3594 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
3595 }
3596 htab->obfd = saved_obfd;
3597 }
3598
3599 if (!htab->root.splt
3600 || !htab->root.srelplt
3601 || !htab->sdynbss
3602 || (!bfd_link_pic (info) && !htab->srelbss))
3603 abort ();
3604
3605 return TRUE;
3606 }
3607
3608 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3609
3610 static void
3611 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
3612 struct elf_link_hash_entry *dir,
3613 struct elf_link_hash_entry *ind)
3614 {
3615 struct elf32_arm_link_hash_entry *edir, *eind;
3616
3617 edir = (struct elf32_arm_link_hash_entry *) dir;
3618 eind = (struct elf32_arm_link_hash_entry *) ind;
3619
3620 if (eind->dyn_relocs != NULL)
3621 {
3622 if (edir->dyn_relocs != NULL)
3623 {
3624 struct elf_dyn_relocs **pp;
3625 struct elf_dyn_relocs *p;
3626
3627 /* Add reloc counts against the indirect sym to the direct sym
3628 list. Merge any entries against the same section. */
3629 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3630 {
3631 struct elf_dyn_relocs *q;
3632
3633 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3634 if (q->sec == p->sec)
3635 {
3636 q->pc_count += p->pc_count;
3637 q->count += p->count;
3638 *pp = p->next;
3639 break;
3640 }
3641 if (q == NULL)
3642 pp = &p->next;
3643 }
3644 *pp = edir->dyn_relocs;
3645 }
3646
3647 edir->dyn_relocs = eind->dyn_relocs;
3648 eind->dyn_relocs = NULL;
3649 }
3650
3651 if (ind->root.type == bfd_link_hash_indirect)
3652 {
3653 /* Copy over PLT info. */
3654 edir->plt.thumb_refcount += eind->plt.thumb_refcount;
3655 eind->plt.thumb_refcount = 0;
3656 edir->plt.maybe_thumb_refcount += eind->plt.maybe_thumb_refcount;
3657 eind->plt.maybe_thumb_refcount = 0;
3658 edir->plt.noncall_refcount += eind->plt.noncall_refcount;
3659 eind->plt.noncall_refcount = 0;
3660
3661 /* We should only allocate a function to .iplt once the final
3662 symbol information is known. */
3663 BFD_ASSERT (!eind->is_iplt);
3664
3665 if (dir->got.refcount <= 0)
3666 {
3667 edir->tls_type = eind->tls_type;
3668 eind->tls_type = GOT_UNKNOWN;
3669 }
3670 }
3671
3672 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3673 }
3674
3675 /* Destroy an ARM elf linker hash table. */
3676
3677 static void
3678 elf32_arm_link_hash_table_free (bfd *obfd)
3679 {
3680 struct elf32_arm_link_hash_table *ret
3681 = (struct elf32_arm_link_hash_table *) obfd->link.hash;
3682
3683 bfd_hash_table_free (&ret->stub_hash_table);
3684 _bfd_elf_link_hash_table_free (obfd);
3685 }
3686
3687 /* Create an ARM elf linker hash table. */
3688
3689 static struct bfd_link_hash_table *
3690 elf32_arm_link_hash_table_create (bfd *abfd)
3691 {
3692 struct elf32_arm_link_hash_table *ret;
3693 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
3694
3695 ret = (struct elf32_arm_link_hash_table *) bfd_zmalloc (amt);
3696 if (ret == NULL)
3697 return NULL;
3698
3699 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
3700 elf32_arm_link_hash_newfunc,
3701 sizeof (struct elf32_arm_link_hash_entry),
3702 ARM_ELF_DATA))
3703 {
3704 free (ret);
3705 return NULL;
3706 }
3707
3708 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3709 ret->stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
3710 #ifdef FOUR_WORD_PLT
3711 ret->plt_header_size = 16;
3712 ret->plt_entry_size = 16;
3713 #else
3714 ret->plt_header_size = 20;
3715 ret->plt_entry_size = elf32_arm_use_long_plt_entry ? 16 : 12;
3716 #endif
3717 ret->use_rel = 1;
3718 ret->obfd = abfd;
3719
3720 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
3721 sizeof (struct elf32_arm_stub_hash_entry)))
3722 {
3723 _bfd_elf_link_hash_table_free (abfd);
3724 return NULL;
3725 }
3726 ret->root.root.hash_table_free = elf32_arm_link_hash_table_free;
3727
3728 return &ret->root.root;
3729 }
3730
3731 /* Determine what kind of NOPs are available. */
3732
3733 static bfd_boolean
3734 arch_has_arm_nop (struct elf32_arm_link_hash_table *globals)
3735 {
3736 const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3737 Tag_CPU_arch);
3738 return arch == TAG_CPU_ARCH_V6T2
3739 || arch == TAG_CPU_ARCH_V6K
3740 || arch == TAG_CPU_ARCH_V7
3741 || arch == TAG_CPU_ARCH_V7E_M;
3742 }
3743
3744 static bfd_boolean
3745 arch_has_thumb2_nop (struct elf32_arm_link_hash_table *globals)
3746 {
3747 const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3748 Tag_CPU_arch);
3749 return (arch == TAG_CPU_ARCH_V6T2 || arch == TAG_CPU_ARCH_V7
3750 || arch == TAG_CPU_ARCH_V7E_M);
3751 }
3752
3753 static bfd_boolean
3754 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
3755 {
3756 switch (stub_type)
3757 {
3758 case arm_stub_long_branch_thumb_only:
3759 case arm_stub_long_branch_v4t_thumb_arm:
3760 case arm_stub_short_branch_v4t_thumb_arm:
3761 case arm_stub_long_branch_v4t_thumb_arm_pic:
3762 case arm_stub_long_branch_v4t_thumb_tls_pic:
3763 case arm_stub_long_branch_thumb_only_pic:
3764 return TRUE;
3765 case arm_stub_none:
3766 BFD_FAIL ();
3767 return FALSE;
3768 break;
3769 default:
3770 return FALSE;
3771 }
3772 }
3773
3774 /* Determine the type of stub needed, if any, for a call. */
3775
3776 static enum elf32_arm_stub_type
3777 arm_type_of_stub (struct bfd_link_info *info,
3778 asection *input_sec,
3779 const Elf_Internal_Rela *rel,
3780 unsigned char st_type,
3781 enum arm_st_branch_type *actual_branch_type,
3782 struct elf32_arm_link_hash_entry *hash,
3783 bfd_vma destination,
3784 asection *sym_sec,
3785 bfd *input_bfd,
3786 const char *name)
3787 {
3788 bfd_vma location;
3789 bfd_signed_vma branch_offset;
3790 unsigned int r_type;
3791 struct elf32_arm_link_hash_table * globals;
3792 int thumb2;
3793 int thumb_only;
3794 enum elf32_arm_stub_type stub_type = arm_stub_none;
3795 int use_plt = 0;
3796 enum arm_st_branch_type branch_type = *actual_branch_type;
3797 union gotplt_union *root_plt;
3798 struct arm_plt_info *arm_plt;
3799
3800 if (branch_type == ST_BRANCH_LONG)
3801 return stub_type;
3802
3803 globals = elf32_arm_hash_table (info);
3804 if (globals == NULL)
3805 return stub_type;
3806
3807 thumb_only = using_thumb_only (globals);
3808
3809 thumb2 = using_thumb2 (globals);
3810
3811 /* Determine where the call point is. */
3812 location = (input_sec->output_offset
3813 + input_sec->output_section->vma
3814 + rel->r_offset);
3815
3816 r_type = ELF32_R_TYPE (rel->r_info);
3817
3818 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
3819 are considering a function call relocation. */
3820 if (thumb_only && (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
3821 || r_type == R_ARM_THM_JUMP19)
3822 && branch_type == ST_BRANCH_TO_ARM)
3823 branch_type = ST_BRANCH_TO_THUMB;
3824
3825 /* For TLS call relocs, it is the caller's responsibility to provide
3826 the address of the appropriate trampoline. */
3827 if (r_type != R_ARM_TLS_CALL
3828 && r_type != R_ARM_THM_TLS_CALL
3829 && elf32_arm_get_plt_info (input_bfd, hash, ELF32_R_SYM (rel->r_info),
3830 &root_plt, &arm_plt)
3831 && root_plt->offset != (bfd_vma) -1)
3832 {
3833 asection *splt;
3834
3835 if (hash == NULL || hash->is_iplt)
3836 splt = globals->root.iplt;
3837 else
3838 splt = globals->root.splt;
3839 if (splt != NULL)
3840 {
3841 use_plt = 1;
3842
3843 /* Note when dealing with PLT entries: the main PLT stub is in
3844 ARM mode, so if the branch is in Thumb mode, another
3845 Thumb->ARM stub will be inserted later just before the ARM
3846 PLT stub. We don't take this extra distance into account
3847 here, because if a long branch stub is needed, we'll add a
3848 Thumb->Arm one and branch directly to the ARM PLT entry
3849 because it avoids spreading offset corrections in several
3850 places. */
3851
3852 destination = (splt->output_section->vma
3853 + splt->output_offset
3854 + root_plt->offset);
3855 st_type = STT_FUNC;
3856 branch_type = ST_BRANCH_TO_ARM;
3857 }
3858 }
3859 /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */
3860 BFD_ASSERT (st_type != STT_GNU_IFUNC);
3861
3862 branch_offset = (bfd_signed_vma)(destination - location);
3863
3864 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24
3865 || r_type == R_ARM_THM_TLS_CALL || r_type == R_ARM_THM_JUMP19)
3866 {
3867 /* Handle cases where:
3868 - this call goes too far (different Thumb/Thumb2 max
3869 distance)
3870 - it's a Thumb->Arm call and blx is not available, or it's a
3871 Thumb->Arm branch (not bl). A stub is needed in this case,
3872 but only if this call is not through a PLT entry. Indeed,
3873 PLT stubs handle mode switching already.
3874 */
3875 if ((!thumb2
3876 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
3877 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
3878 || (thumb2
3879 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
3880 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
3881 || (thumb2
3882 && (branch_offset > THM2_MAX_FWD_COND_BRANCH_OFFSET
3883 || (branch_offset < THM2_MAX_BWD_COND_BRANCH_OFFSET))
3884 && (r_type == R_ARM_THM_JUMP19))
3885 || (branch_type == ST_BRANCH_TO_ARM
3886 && (((r_type == R_ARM_THM_CALL
3887 || r_type == R_ARM_THM_TLS_CALL) && !globals->use_blx)
3888 || (r_type == R_ARM_THM_JUMP24)
3889 || (r_type == R_ARM_THM_JUMP19))
3890 && !use_plt))
3891 {
3892 if (branch_type == ST_BRANCH_TO_THUMB)
3893 {
3894 /* Thumb to thumb. */
3895 if (!thumb_only)
3896 {
3897 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
3898 /* PIC stubs. */
3899 ? ((globals->use_blx
3900 && (r_type == R_ARM_THM_CALL))
3901 /* V5T and above. Stub starts with ARM code, so
3902 we must be able to switch mode before
3903 reaching it, which is only possible for 'bl'
3904 (ie R_ARM_THM_CALL relocation). */
3905 ? arm_stub_long_branch_any_thumb_pic
3906 /* On V4T, use Thumb code only. */
3907 : arm_stub_long_branch_v4t_thumb_thumb_pic)
3908
3909 /* non-PIC stubs. */
3910 : ((globals->use_blx
3911 && (r_type == R_ARM_THM_CALL))
3912 /* V5T and above. */
3913 ? arm_stub_long_branch_any_any
3914 /* V4T. */
3915 : arm_stub_long_branch_v4t_thumb_thumb);
3916 }
3917 else
3918 {
3919 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
3920 /* PIC stub. */
3921 ? arm_stub_long_branch_thumb_only_pic
3922 /* non-PIC stub. */
3923 : arm_stub_long_branch_thumb_only;
3924 }
3925 }
3926 else
3927 {
3928 /* Thumb to arm. */
3929 if (sym_sec != NULL
3930 && sym_sec->owner != NULL
3931 && !INTERWORK_FLAG (sym_sec->owner))
3932 {
3933 (*_bfd_error_handler)
3934 (_("%B(%s): warning: interworking not enabled.\n"
3935 " first occurrence: %B: Thumb call to ARM"),
3936 sym_sec->owner, input_bfd, name);
3937 }
3938
3939 stub_type =
3940 (bfd_link_pic (info) | globals->pic_veneer)
3941 /* PIC stubs. */
3942 ? (r_type == R_ARM_THM_TLS_CALL
3943 /* TLS PIC stubs. */
3944 ? (globals->use_blx ? arm_stub_long_branch_any_tls_pic
3945 : arm_stub_long_branch_v4t_thumb_tls_pic)
3946 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
3947 /* V5T PIC and above. */
3948 ? arm_stub_long_branch_any_arm_pic
3949 /* V4T PIC stub. */
3950 : arm_stub_long_branch_v4t_thumb_arm_pic))
3951
3952 /* non-PIC stubs. */
3953 : ((globals->use_blx && r_type == R_ARM_THM_CALL)
3954 /* V5T and above. */
3955 ? arm_stub_long_branch_any_any
3956 /* V4T. */
3957 : arm_stub_long_branch_v4t_thumb_arm);
3958
3959 /* Handle v4t short branches. */
3960 if ((stub_type == arm_stub_long_branch_v4t_thumb_arm)
3961 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
3962 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
3963 stub_type = arm_stub_short_branch_v4t_thumb_arm;
3964 }
3965 }
3966 }
3967 else if (r_type == R_ARM_CALL
3968 || r_type == R_ARM_JUMP24
3969 || r_type == R_ARM_PLT32
3970 || r_type == R_ARM_TLS_CALL)
3971 {
3972 if (branch_type == ST_BRANCH_TO_THUMB)
3973 {
3974 /* Arm to thumb. */
3975
3976 if (sym_sec != NULL
3977 && sym_sec->owner != NULL
3978 && !INTERWORK_FLAG (sym_sec->owner))
3979 {
3980 (*_bfd_error_handler)
3981 (_("%B(%s): warning: interworking not enabled.\n"
3982 " first occurrence: %B: ARM call to Thumb"),
3983 sym_sec->owner, input_bfd, name);
3984 }
3985
3986 /* We have an extra 2-bytes reach because of
3987 the mode change (bit 24 (H) of BLX encoding). */
3988 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
3989 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
3990 || (r_type == R_ARM_CALL && !globals->use_blx)
3991 || (r_type == R_ARM_JUMP24)
3992 || (r_type == R_ARM_PLT32))
3993 {
3994 stub_type = (bfd_link_pic (info) | globals->pic_veneer)
3995 /* PIC stubs. */
3996 ? ((globals->use_blx)
3997 /* V5T and above. */
3998 ? arm_stub_long_branch_any_thumb_pic
3999 /* V4T stub. */
4000 : arm_stub_long_branch_v4t_arm_thumb_pic)
4001
4002 /* non-PIC stubs. */
4003 : ((globals->use_blx)
4004 /* V5T and above. */
4005 ? arm_stub_long_branch_any_any
4006 /* V4T. */
4007 : arm_stub_long_branch_v4t_arm_thumb);
4008 }
4009 }
4010 else
4011 {
4012 /* Arm to arm. */
4013 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
4014 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
4015 {
4016 stub_type =
4017 (bfd_link_pic (info) | globals->pic_veneer)
4018 /* PIC stubs. */
4019 ? (r_type == R_ARM_TLS_CALL
4020 /* TLS PIC Stub. */
4021 ? arm_stub_long_branch_any_tls_pic
4022 : (globals->nacl_p
4023 ? arm_stub_long_branch_arm_nacl_pic
4024 : arm_stub_long_branch_any_arm_pic))
4025 /* non-PIC stubs. */
4026 : (globals->nacl_p
4027 ? arm_stub_long_branch_arm_nacl
4028 : arm_stub_long_branch_any_any);
4029 }
4030 }
4031 }
4032
4033 /* If a stub is needed, record the actual destination type. */
4034 if (stub_type != arm_stub_none)
4035 *actual_branch_type = branch_type;
4036
4037 return stub_type;
4038 }
4039
4040 /* Build a name for an entry in the stub hash table. */
4041
4042 static char *
4043 elf32_arm_stub_name (const asection *input_section,
4044 const asection *sym_sec,
4045 const struct elf32_arm_link_hash_entry *hash,
4046 const Elf_Internal_Rela *rel,
4047 enum elf32_arm_stub_type stub_type)
4048 {
4049 char *stub_name;
4050 bfd_size_type len;
4051
4052 if (hash)
4053 {
4054 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1 + 2 + 1;
4055 stub_name = (char *) bfd_malloc (len);
4056 if (stub_name != NULL)
4057 sprintf (stub_name, "%08x_%s+%x_%d",
4058 input_section->id & 0xffffffff,
4059 hash->root.root.root.string,
4060 (int) rel->r_addend & 0xffffffff,
4061 (int) stub_type);
4062 }
4063 else
4064 {
4065 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1;
4066 stub_name = (char *) bfd_malloc (len);
4067 if (stub_name != NULL)
4068 sprintf (stub_name, "%08x_%x:%x+%x_%d",
4069 input_section->id & 0xffffffff,
4070 sym_sec->id & 0xffffffff,
4071 ELF32_R_TYPE (rel->r_info) == R_ARM_TLS_CALL
4072 || ELF32_R_TYPE (rel->r_info) == R_ARM_THM_TLS_CALL
4073 ? 0 : (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
4074 (int) rel->r_addend & 0xffffffff,
4075 (int) stub_type);
4076 }
4077
4078 return stub_name;
4079 }
4080
4081 /* Look up an entry in the stub hash. Stub entries are cached because
4082 creating the stub name takes a bit of time. */
4083
4084 static struct elf32_arm_stub_hash_entry *
4085 elf32_arm_get_stub_entry (const asection *input_section,
4086 const asection *sym_sec,
4087 struct elf_link_hash_entry *hash,
4088 const Elf_Internal_Rela *rel,
4089 struct elf32_arm_link_hash_table *htab,
4090 enum elf32_arm_stub_type stub_type)
4091 {
4092 struct elf32_arm_stub_hash_entry *stub_entry;
4093 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
4094 const asection *id_sec;
4095
4096 if ((input_section->flags & SEC_CODE) == 0)
4097 return NULL;
4098
4099 /* If this input section is part of a group of sections sharing one
4100 stub section, then use the id of the first section in the group.
4101 Stub names need to include a section id, as there may well be
4102 more than one stub used to reach say, printf, and we need to
4103 distinguish between them. */
4104 id_sec = htab->stub_group[input_section->id].link_sec;
4105
4106 if (h != NULL && h->stub_cache != NULL
4107 && h->stub_cache->h == h
4108 && h->stub_cache->id_sec == id_sec
4109 && h->stub_cache->stub_type == stub_type)
4110 {
4111 stub_entry = h->stub_cache;
4112 }
4113 else
4114 {
4115 char *stub_name;
4116
4117 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel, stub_type);
4118 if (stub_name == NULL)
4119 return NULL;
4120
4121 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
4122 stub_name, FALSE, FALSE);
4123 if (h != NULL)
4124 h->stub_cache = stub_entry;
4125
4126 free (stub_name);
4127 }
4128
4129 return stub_entry;
4130 }
4131
4132 /* Find or create a stub section. Returns a pointer to the stub section, and
4133 the section to which the stub section will be attached (in *LINK_SEC_P).
4134 LINK_SEC_P may be NULL. */
4135
4136 static asection *
4137 elf32_arm_create_or_find_stub_sec (asection **link_sec_p, asection *section,
4138 struct elf32_arm_link_hash_table *htab)
4139 {
4140 asection *link_sec;
4141 asection *stub_sec;
4142
4143 link_sec = htab->stub_group[section->id].link_sec;
4144 BFD_ASSERT (link_sec != NULL);
4145 stub_sec = htab->stub_group[section->id].stub_sec;
4146
4147 if (stub_sec == NULL)
4148 {
4149 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4150 if (stub_sec == NULL)
4151 {
4152 size_t namelen;
4153 bfd_size_type len;
4154 char *s_name;
4155
4156 namelen = strlen (link_sec->name);
4157 len = namelen + sizeof (STUB_SUFFIX);
4158 s_name = (char *) bfd_alloc (htab->stub_bfd, len);
4159 if (s_name == NULL)
4160 return NULL;
4161
4162 memcpy (s_name, link_sec->name, namelen);
4163 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4164 stub_sec = (*htab->add_stub_section) (s_name, link_sec,
4165 htab->nacl_p ? 4 : 3);
4166 if (stub_sec == NULL)
4167 return NULL;
4168 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4169 }
4170 htab->stub_group[section->id].stub_sec = stub_sec;
4171 }
4172
4173 if (link_sec_p)
4174 *link_sec_p = link_sec;
4175
4176 return stub_sec;
4177 }
4178
4179 /* Add a new stub entry to the stub hash. Not all fields of the new
4180 stub entry are initialised. */
4181
4182 static struct elf32_arm_stub_hash_entry *
4183 elf32_arm_add_stub (const char *stub_name,
4184 asection *section,
4185 struct elf32_arm_link_hash_table *htab)
4186 {
4187 asection *link_sec;
4188 asection *stub_sec;
4189 struct elf32_arm_stub_hash_entry *stub_entry;
4190
4191 stub_sec = elf32_arm_create_or_find_stub_sec (&link_sec, section, htab);
4192 if (stub_sec == NULL)
4193 return NULL;
4194
4195 /* Enter this entry into the linker stub hash table. */
4196 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4197 TRUE, FALSE);
4198 if (stub_entry == NULL)
4199 {
4200 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
4201 section->owner,
4202 stub_name);
4203 return NULL;
4204 }
4205
4206 stub_entry->stub_sec = stub_sec;
4207 stub_entry->stub_offset = 0;
4208 stub_entry->id_sec = link_sec;
4209
4210 return stub_entry;
4211 }
4212
4213 /* Store an Arm insn into an output section not processed by
4214 elf32_arm_write_section. */
4215
4216 static void
4217 put_arm_insn (struct elf32_arm_link_hash_table * htab,
4218 bfd * output_bfd, bfd_vma val, void * ptr)
4219 {
4220 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4221 bfd_putl32 (val, ptr);
4222 else
4223 bfd_putb32 (val, ptr);
4224 }
4225
4226 /* Store a 16-bit Thumb insn into an output section not processed by
4227 elf32_arm_write_section. */
4228
4229 static void
4230 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
4231 bfd * output_bfd, bfd_vma val, void * ptr)
4232 {
4233 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4234 bfd_putl16 (val, ptr);
4235 else
4236 bfd_putb16 (val, ptr);
4237 }
4238
4239 /* Store a Thumb2 insn into an output section not processed by
4240 elf32_arm_write_section. */
4241
4242 static void
4243 put_thumb2_insn (struct elf32_arm_link_hash_table * htab,
4244 bfd * output_bfd, bfd_vma val, void * ptr)
4245 {
4246 /* T2 instructions are 16-bit streamed. */
4247 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4248 {
4249 bfd_putl16 ((val >> 16) & 0xffff, ptr);
4250 bfd_putl16 ((val & 0xffff), ptr + 2);
4251 }
4252 else
4253 {
4254 bfd_putb16 ((val >> 16) & 0xffff, ptr);
4255 bfd_putb16 ((val & 0xffff), ptr + 2);
4256 }
4257 }
4258
4259 /* If it's possible to change R_TYPE to a more efficient access
4260 model, return the new reloc type. */
4261
4262 static unsigned
4263 elf32_arm_tls_transition (struct bfd_link_info *info, int r_type,
4264 struct elf_link_hash_entry *h)
4265 {
4266 int is_local = (h == NULL);
4267
4268 if (bfd_link_pic (info)
4269 || (h && h->root.type == bfd_link_hash_undefweak))
4270 return r_type;
4271
4272 /* We do not support relaxations for Old TLS models. */
4273 switch (r_type)
4274 {
4275 case R_ARM_TLS_GOTDESC:
4276 case R_ARM_TLS_CALL:
4277 case R_ARM_THM_TLS_CALL:
4278 case R_ARM_TLS_DESCSEQ:
4279 case R_ARM_THM_TLS_DESCSEQ:
4280 return is_local ? R_ARM_TLS_LE32 : R_ARM_TLS_IE32;
4281 }
4282
4283 return r_type;
4284 }
4285
4286 static bfd_reloc_status_type elf32_arm_final_link_relocate
4287 (reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
4288 Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
4289 const char *, unsigned char, enum arm_st_branch_type,
4290 struct elf_link_hash_entry *, bfd_boolean *, char **);
4291
4292 static unsigned int
4293 arm_stub_required_alignment (enum elf32_arm_stub_type stub_type)
4294 {
4295 switch (stub_type)
4296 {
4297 case arm_stub_a8_veneer_b_cond:
4298 case arm_stub_a8_veneer_b:
4299 case arm_stub_a8_veneer_bl:
4300 return 2;
4301
4302 case arm_stub_long_branch_any_any:
4303 case arm_stub_long_branch_v4t_arm_thumb:
4304 case arm_stub_long_branch_thumb_only:
4305 case arm_stub_long_branch_v4t_thumb_thumb:
4306 case arm_stub_long_branch_v4t_thumb_arm:
4307 case arm_stub_short_branch_v4t_thumb_arm:
4308 case arm_stub_long_branch_any_arm_pic:
4309 case arm_stub_long_branch_any_thumb_pic:
4310 case arm_stub_long_branch_v4t_thumb_thumb_pic:
4311 case arm_stub_long_branch_v4t_arm_thumb_pic:
4312 case arm_stub_long_branch_v4t_thumb_arm_pic:
4313 case arm_stub_long_branch_thumb_only_pic:
4314 case arm_stub_long_branch_any_tls_pic:
4315 case arm_stub_long_branch_v4t_thumb_tls_pic:
4316 case arm_stub_a8_veneer_blx:
4317 return 4;
4318
4319 case arm_stub_long_branch_arm_nacl:
4320 case arm_stub_long_branch_arm_nacl_pic:
4321 return 16;
4322
4323 default:
4324 abort (); /* Should be unreachable. */
4325 }
4326 }
4327
4328 static bfd_boolean
4329 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
4330 void * in_arg)
4331 {
4332 #define MAXRELOCS 3
4333 struct elf32_arm_stub_hash_entry *stub_entry;
4334 struct elf32_arm_link_hash_table *globals;
4335 struct bfd_link_info *info;
4336 asection *stub_sec;
4337 bfd *stub_bfd;
4338 bfd_byte *loc;
4339 bfd_vma sym_value;
4340 int template_size;
4341 int size;
4342 const insn_sequence *template_sequence;
4343 int i;
4344 int stub_reloc_idx[MAXRELOCS] = {-1, -1};
4345 int stub_reloc_offset[MAXRELOCS] = {0, 0};
4346 int nrelocs = 0;
4347
4348 /* Massage our args to the form they really have. */
4349 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
4350 info = (struct bfd_link_info *) in_arg;
4351
4352 globals = elf32_arm_hash_table (info);
4353 if (globals == NULL)
4354 return FALSE;
4355
4356 stub_sec = stub_entry->stub_sec;
4357
4358 if ((globals->fix_cortex_a8 < 0)
4359 != (arm_stub_required_alignment (stub_entry->stub_type) == 2))
4360 /* We have to do less-strictly-aligned fixes last. */
4361 return TRUE;
4362
4363 /* Make a note of the offset within the stubs for this entry. */
4364 stub_entry->stub_offset = stub_sec->size;
4365 loc = stub_sec->contents + stub_entry->stub_offset;
4366
4367 stub_bfd = stub_sec->owner;
4368
4369 /* This is the address of the stub destination. */
4370 sym_value = (stub_entry->target_value
4371 + stub_entry->target_section->output_offset
4372 + stub_entry->target_section->output_section->vma);
4373
4374 template_sequence = stub_entry->stub_template;
4375 template_size = stub_entry->stub_template_size;
4376
4377 size = 0;
4378 for (i = 0; i < template_size; i++)
4379 {
4380 switch (template_sequence[i].type)
4381 {
4382 case THUMB16_TYPE:
4383 {
4384 bfd_vma data = (bfd_vma) template_sequence[i].data;
4385 if (template_sequence[i].reloc_addend != 0)
4386 {
4387 /* We've borrowed the reloc_addend field to mean we should
4388 insert a condition code into this (Thumb-1 branch)
4389 instruction. See THUMB16_BCOND_INSN. */
4390 BFD_ASSERT ((data & 0xff00) == 0xd000);
4391 data |= ((stub_entry->orig_insn >> 22) & 0xf) << 8;
4392 }
4393 bfd_put_16 (stub_bfd, data, loc + size);
4394 size += 2;
4395 }
4396 break;
4397
4398 case THUMB32_TYPE:
4399 bfd_put_16 (stub_bfd,
4400 (template_sequence[i].data >> 16) & 0xffff,
4401 loc + size);
4402 bfd_put_16 (stub_bfd, template_sequence[i].data & 0xffff,
4403 loc + size + 2);
4404 if (template_sequence[i].r_type != R_ARM_NONE)
4405 {
4406 stub_reloc_idx[nrelocs] = i;
4407 stub_reloc_offset[nrelocs++] = size;
4408 }
4409 size += 4;
4410 break;
4411
4412 case ARM_TYPE:
4413 bfd_put_32 (stub_bfd, template_sequence[i].data,
4414 loc + size);
4415 /* Handle cases where the target is encoded within the
4416 instruction. */
4417 if (template_sequence[i].r_type == R_ARM_JUMP24)
4418 {
4419 stub_reloc_idx[nrelocs] = i;
4420 stub_reloc_offset[nrelocs++] = size;
4421 }
4422 size += 4;
4423 break;
4424
4425 case DATA_TYPE:
4426 bfd_put_32 (stub_bfd, template_sequence[i].data, loc + size);
4427 stub_reloc_idx[nrelocs] = i;
4428 stub_reloc_offset[nrelocs++] = size;
4429 size += 4;
4430 break;
4431
4432 default:
4433 BFD_FAIL ();
4434 return FALSE;
4435 }
4436 }
4437
4438 stub_sec->size += size;
4439
4440 /* Stub size has already been computed in arm_size_one_stub. Check
4441 consistency. */
4442 BFD_ASSERT (size == stub_entry->stub_size);
4443
4444 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
4445 if (stub_entry->branch_type == ST_BRANCH_TO_THUMB)
4446 sym_value |= 1;
4447
4448 /* Assume there is at least one and at most MAXRELOCS entries to relocate
4449 in each stub. */
4450 BFD_ASSERT (nrelocs != 0 && nrelocs <= MAXRELOCS);
4451
4452 for (i = 0; i < nrelocs; i++)
4453 if (template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_JUMP24
4454 || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_JUMP19
4455 || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_CALL
4456 || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_XPC22)
4457 {
4458 Elf_Internal_Rela rel;
4459 bfd_boolean unresolved_reloc;
4460 char *error_message;
4461 enum arm_st_branch_type branch_type
4462 = (template_sequence[stub_reloc_idx[i]].r_type != R_ARM_THM_XPC22
4463 ? ST_BRANCH_TO_THUMB : ST_BRANCH_TO_ARM);
4464 bfd_vma points_to = sym_value + stub_entry->target_addend;
4465
4466 rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
4467 rel.r_info = ELF32_R_INFO (0,
4468 template_sequence[stub_reloc_idx[i]].r_type);
4469 rel.r_addend = template_sequence[stub_reloc_idx[i]].reloc_addend;
4470
4471 if (stub_entry->stub_type == arm_stub_a8_veneer_b_cond && i == 0)
4472 /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[]
4473 template should refer back to the instruction after the original
4474 branch. */
4475 points_to = sym_value;
4476
4477 /* There may be unintended consequences if this is not true. */
4478 BFD_ASSERT (stub_entry->h == NULL);
4479
4480 /* Note: _bfd_final_link_relocate doesn't handle these relocations
4481 properly. We should probably use this function unconditionally,
4482 rather than only for certain relocations listed in the enclosing
4483 conditional, for the sake of consistency. */
4484 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4485 (template_sequence[stub_reloc_idx[i]].r_type),
4486 stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel,
4487 points_to, info, stub_entry->target_section, "", STT_FUNC,
4488 branch_type, (struct elf_link_hash_entry *) stub_entry->h,
4489 &unresolved_reloc, &error_message);
4490 }
4491 else
4492 {
4493 Elf_Internal_Rela rel;
4494 bfd_boolean unresolved_reloc;
4495 char *error_message;
4496 bfd_vma points_to = sym_value + stub_entry->target_addend
4497 + template_sequence[stub_reloc_idx[i]].reloc_addend;
4498
4499 rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i];
4500 rel.r_info = ELF32_R_INFO (0,
4501 template_sequence[stub_reloc_idx[i]].r_type);
4502 rel.r_addend = 0;
4503
4504 elf32_arm_final_link_relocate (elf32_arm_howto_from_type
4505 (template_sequence[stub_reloc_idx[i]].r_type),
4506 stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel,
4507 points_to, info, stub_entry->target_section, "", STT_FUNC,
4508 stub_entry->branch_type,
4509 (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc,
4510 &error_message);
4511 }
4512
4513 return TRUE;
4514 #undef MAXRELOCS
4515 }
4516
4517 /* Calculate the template, template size and instruction size for a stub.
4518 Return value is the instruction size. */
4519
4520 static unsigned int
4521 find_stub_size_and_template (enum elf32_arm_stub_type stub_type,
4522 const insn_sequence **stub_template,
4523 int *stub_template_size)
4524 {
4525 const insn_sequence *template_sequence = NULL;
4526 int template_size = 0, i;
4527 unsigned int size;
4528
4529 template_sequence = stub_definitions[stub_type].template_sequence;
4530 if (stub_template)
4531 *stub_template = template_sequence;
4532
4533 template_size = stub_definitions[stub_type].template_size;
4534 if (stub_template_size)
4535 *stub_template_size = template_size;
4536
4537 size = 0;
4538 for (i = 0; i < template_size; i++)
4539 {
4540 switch (template_sequence[i].type)
4541 {
4542 case THUMB16_TYPE:
4543 size += 2;
4544 break;
4545
4546 case ARM_TYPE:
4547 case THUMB32_TYPE:
4548 case DATA_TYPE:
4549 size += 4;
4550 break;
4551
4552 default:
4553 BFD_FAIL ();
4554 return 0;
4555 }
4556 }
4557
4558 return size;
4559 }
4560
4561 /* As above, but don't actually build the stub. Just bump offset so
4562 we know stub section sizes. */
4563
4564 static bfd_boolean
4565 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
4566 void *in_arg ATTRIBUTE_UNUSED)
4567 {
4568 struct elf32_arm_stub_hash_entry *stub_entry;
4569 const insn_sequence *template_sequence;
4570 int template_size, size;
4571
4572 /* Massage our args to the form they really have. */
4573 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
4574
4575 BFD_ASSERT((stub_entry->stub_type > arm_stub_none)
4576 && stub_entry->stub_type < ARRAY_SIZE(stub_definitions));
4577
4578 size = find_stub_size_and_template (stub_entry->stub_type, &template_sequence,
4579 &template_size);
4580
4581 stub_entry->stub_size = size;
4582 stub_entry->stub_template = template_sequence;
4583 stub_entry->stub_template_size = template_size;
4584
4585 size = (size + 7) & ~7;
4586 stub_entry->stub_sec->size += size;
4587
4588 return TRUE;
4589 }
4590
4591 /* External entry points for sizing and building linker stubs. */
4592
4593 /* Set up various things so that we can make a list of input sections
4594 for each output section included in the link. Returns -1 on error,
4595 0 when no stubs will be needed, and 1 on success. */
4596
4597 int
4598 elf32_arm_setup_section_lists (bfd *output_bfd,
4599 struct bfd_link_info *info)
4600 {
4601 bfd *input_bfd;
4602 unsigned int bfd_count;
4603 unsigned int top_id, top_index;
4604 asection *section;
4605 asection **input_list, **list;
4606 bfd_size_type amt;
4607 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4608
4609 if (htab == NULL)
4610 return 0;
4611 if (! is_elf_hash_table (htab))
4612 return 0;
4613
4614 /* Count the number of input BFDs and find the top input section id. */
4615 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
4616 input_bfd != NULL;
4617 input_bfd = input_bfd->link.next)
4618 {
4619 bfd_count += 1;
4620 for (section = input_bfd->sections;
4621 section != NULL;
4622 section = section->next)
4623 {
4624 if (top_id < section->id)
4625 top_id = section->id;
4626 }
4627 }
4628 htab->bfd_count = bfd_count;
4629
4630 amt = sizeof (struct map_stub) * (top_id + 1);
4631 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
4632 if (htab->stub_group == NULL)
4633 return -1;
4634 htab->top_id = top_id;
4635
4636 /* We can't use output_bfd->section_count here to find the top output
4637 section index as some sections may have been removed, and
4638 _bfd_strip_section_from_output doesn't renumber the indices. */
4639 for (section = output_bfd->sections, top_index = 0;
4640 section != NULL;
4641 section = section->next)
4642 {
4643 if (top_index < section->index)
4644 top_index = section->index;
4645 }
4646
4647 htab->top_index = top_index;
4648 amt = sizeof (asection *) * (top_index + 1);
4649 input_list = (asection **) bfd_malloc (amt);
4650 htab->input_list = input_list;
4651 if (input_list == NULL)
4652 return -1;
4653
4654 /* For sections we aren't interested in, mark their entries with a
4655 value we can check later. */
4656 list = input_list + top_index;
4657 do
4658 *list = bfd_abs_section_ptr;
4659 while (list-- != input_list);
4660
4661 for (section = output_bfd->sections;
4662 section != NULL;
4663 section = section->next)
4664 {
4665 if ((section->flags & SEC_CODE) != 0)
4666 input_list[section->index] = NULL;
4667 }
4668
4669 return 1;
4670 }
4671
4672 /* The linker repeatedly calls this function for each input section,
4673 in the order that input sections are linked into output sections.
4674 Build lists of input sections to determine groupings between which
4675 we may insert linker stubs. */
4676
4677 void
4678 elf32_arm_next_input_section (struct bfd_link_info *info,
4679 asection *isec)
4680 {
4681 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4682
4683 if (htab == NULL)
4684 return;
4685
4686 if (isec->output_section->index <= htab->top_index)
4687 {
4688 asection **list = htab->input_list + isec->output_section->index;
4689
4690 if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0)
4691 {
4692 /* Steal the link_sec pointer for our list. */
4693 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
4694 /* This happens to make the list in reverse order,
4695 which we reverse later. */
4696 PREV_SEC (isec) = *list;
4697 *list = isec;
4698 }
4699 }
4700 }
4701
4702 /* See whether we can group stub sections together. Grouping stub
4703 sections may result in fewer stubs. More importantly, we need to
4704 put all .init* and .fini* stubs at the end of the .init or
4705 .fini output sections respectively, because glibc splits the
4706 _init and _fini functions into multiple parts. Putting a stub in
4707 the middle of a function is not a good idea. */
4708
4709 static void
4710 group_sections (struct elf32_arm_link_hash_table *htab,
4711 bfd_size_type stub_group_size,
4712 bfd_boolean stubs_always_after_branch)
4713 {
4714 asection **list = htab->input_list;
4715
4716 do
4717 {
4718 asection *tail = *list;
4719 asection *head;
4720
4721 if (tail == bfd_abs_section_ptr)
4722 continue;
4723
4724 /* Reverse the list: we must avoid placing stubs at the
4725 beginning of the section because the beginning of the text
4726 section may be required for an interrupt vector in bare metal
4727 code. */
4728 #define NEXT_SEC PREV_SEC
4729 head = NULL;
4730 while (tail != NULL)
4731 {
4732 /* Pop from tail. */
4733 asection *item = tail;
4734 tail = PREV_SEC (item);
4735
4736 /* Push on head. */
4737 NEXT_SEC (item) = head;
4738 head = item;
4739 }
4740
4741 while (head != NULL)
4742 {
4743 asection *curr;
4744 asection *next;
4745 bfd_vma stub_group_start = head->output_offset;
4746 bfd_vma end_of_next;
4747
4748 curr = head;
4749 while (NEXT_SEC (curr) != NULL)
4750 {
4751 next = NEXT_SEC (curr);
4752 end_of_next = next->output_offset + next->size;
4753 if (end_of_next - stub_group_start >= stub_group_size)
4754 /* End of NEXT is too far from start, so stop. */
4755 break;
4756 /* Add NEXT to the group. */
4757 curr = next;
4758 }
4759
4760 /* OK, the size from the start to the start of CURR is less
4761 than stub_group_size and thus can be handled by one stub
4762 section. (Or the head section is itself larger than
4763 stub_group_size, in which case we may be toast.)
4764 We should really be keeping track of the total size of
4765 stubs added here, as stubs contribute to the final output
4766 section size. */
4767 do
4768 {
4769 next = NEXT_SEC (head);
4770 /* Set up this stub group. */
4771 htab->stub_group[head->id].link_sec = curr;
4772 }
4773 while (head != curr && (head = next) != NULL);
4774
4775 /* But wait, there's more! Input sections up to stub_group_size
4776 bytes after the stub section can be handled by it too. */
4777 if (!stubs_always_after_branch)
4778 {
4779 stub_group_start = curr->output_offset + curr->size;
4780
4781 while (next != NULL)
4782 {
4783 end_of_next = next->output_offset + next->size;
4784 if (end_of_next - stub_group_start >= stub_group_size)
4785 /* End of NEXT is too far from stubs, so stop. */
4786 break;
4787 /* Add NEXT to the stub group. */
4788 head = next;
4789 next = NEXT_SEC (head);
4790 htab->stub_group[head->id].link_sec = curr;
4791 }
4792 }
4793 head = next;
4794 }
4795 }
4796 while (list++ != htab->input_list + htab->top_index);
4797
4798 free (htab->input_list);
4799 #undef PREV_SEC
4800 #undef NEXT_SEC
4801 }
4802
4803 /* Comparison function for sorting/searching relocations relating to Cortex-A8
4804 erratum fix. */
4805
4806 static int
4807 a8_reloc_compare (const void *a, const void *b)
4808 {
4809 const struct a8_erratum_reloc *ra = (const struct a8_erratum_reloc *) a;
4810 const struct a8_erratum_reloc *rb = (const struct a8_erratum_reloc *) b;
4811
4812 if (ra->from < rb->from)
4813 return -1;
4814 else if (ra->from > rb->from)
4815 return 1;
4816 else
4817 return 0;
4818 }
4819
4820 static struct elf_link_hash_entry *find_thumb_glue (struct bfd_link_info *,
4821 const char *, char **);
4822
4823 /* Helper function to scan code for sequences which might trigger the Cortex-A8
4824 branch/TLB erratum. Fill in the table described by A8_FIXES_P,
4825 NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false
4826 otherwise. */
4827
4828 static bfd_boolean
4829 cortex_a8_erratum_scan (bfd *input_bfd,
4830 struct bfd_link_info *info,
4831 struct a8_erratum_fix **a8_fixes_p,
4832 unsigned int *num_a8_fixes_p,
4833 unsigned int *a8_fix_table_size_p,
4834 struct a8_erratum_reloc *a8_relocs,
4835 unsigned int num_a8_relocs,
4836 unsigned prev_num_a8_fixes,
4837 bfd_boolean *stub_changed_p)
4838 {
4839 asection *section;
4840 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
4841 struct a8_erratum_fix *a8_fixes = *a8_fixes_p;
4842 unsigned int num_a8_fixes = *num_a8_fixes_p;
4843 unsigned int a8_fix_table_size = *a8_fix_table_size_p;
4844
4845 if (htab == NULL)
4846 return FALSE;
4847
4848 for (section = input_bfd->sections;
4849 section != NULL;
4850 section = section->next)
4851 {
4852 bfd_byte *contents = NULL;
4853 struct _arm_elf_section_data *sec_data;
4854 unsigned int span;
4855 bfd_vma base_vma;
4856
4857 if (elf_section_type (section) != SHT_PROGBITS
4858 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
4859 || (section->flags & SEC_EXCLUDE) != 0
4860 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
4861 || (section->output_section == bfd_abs_section_ptr))
4862 continue;
4863
4864 base_vma = section->output_section->vma + section->output_offset;
4865
4866 if (elf_section_data (section)->this_hdr.contents != NULL)
4867 contents = elf_section_data (section)->this_hdr.contents;
4868 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
4869 return TRUE;
4870
4871 sec_data = elf32_arm_section_data (section);
4872
4873 for (span = 0; span < sec_data->mapcount; span++)
4874 {
4875 unsigned int span_start = sec_data->map[span].vma;
4876 unsigned int span_end = (span == sec_data->mapcount - 1)
4877 ? section->size : sec_data->map[span + 1].vma;
4878 unsigned int i;
4879 char span_type = sec_data->map[span].type;
4880 bfd_boolean last_was_32bit = FALSE, last_was_branch = FALSE;
4881
4882 if (span_type != 't')
4883 continue;
4884
4885 /* Span is entirely within a single 4KB region: skip scanning. */
4886 if (((base_vma + span_start) & ~0xfff)
4887 == ((base_vma + span_end) & ~0xfff))
4888 continue;
4889
4890 /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where:
4891
4892 * The opcode is BLX.W, BL.W, B.W, Bcc.W
4893 * The branch target is in the same 4KB region as the
4894 first half of the branch.
4895 * The instruction before the branch is a 32-bit
4896 length non-branch instruction. */
4897 for (i = span_start; i < span_end;)
4898 {
4899 unsigned int insn = bfd_getl16 (&contents[i]);
4900 bfd_boolean insn_32bit = FALSE, is_blx = FALSE, is_b = FALSE;
4901 bfd_boolean is_bl = FALSE, is_bcc = FALSE, is_32bit_branch;
4902
4903 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
4904 insn_32bit = TRUE;
4905
4906 if (insn_32bit)
4907 {
4908 /* Load the rest of the insn (in manual-friendly order). */
4909 insn = (insn << 16) | bfd_getl16 (&contents[i + 2]);
4910
4911 /* Encoding T4: B<c>.W. */
4912 is_b = (insn & 0xf800d000) == 0xf0009000;
4913 /* Encoding T1: BL<c>.W. */
4914 is_bl = (insn & 0xf800d000) == 0xf000d000;
4915 /* Encoding T2: BLX<c>.W. */
4916 is_blx = (insn & 0xf800d000) == 0xf000c000;
4917 /* Encoding T3: B<c>.W (not permitted in IT block). */
4918 is_bcc = (insn & 0xf800d000) == 0xf0008000
4919 && (insn & 0x07f00000) != 0x03800000;
4920 }
4921
4922 is_32bit_branch = is_b || is_bl || is_blx || is_bcc;
4923
4924 if (((base_vma + i) & 0xfff) == 0xffe
4925 && insn_32bit
4926 && is_32bit_branch
4927 && last_was_32bit
4928 && ! last_was_branch)
4929 {
4930 bfd_signed_vma offset = 0;
4931 bfd_boolean force_target_arm = FALSE;
4932 bfd_boolean force_target_thumb = FALSE;
4933 bfd_vma target;
4934 enum elf32_arm_stub_type stub_type = arm_stub_none;
4935 struct a8_erratum_reloc key, *found;
4936 bfd_boolean use_plt = FALSE;
4937
4938 key.from = base_vma + i;
4939 found = (struct a8_erratum_reloc *)
4940 bsearch (&key, a8_relocs, num_a8_relocs,
4941 sizeof (struct a8_erratum_reloc),
4942 &a8_reloc_compare);
4943
4944 if (found)
4945 {
4946 char *error_message = NULL;
4947 struct elf_link_hash_entry *entry;
4948
4949 /* We don't care about the error returned from this
4950 function, only if there is glue or not. */
4951 entry = find_thumb_glue (info, found->sym_name,
4952 &error_message);
4953
4954 if (entry)
4955 found->non_a8_stub = TRUE;
4956
4957 /* Keep a simpler condition, for the sake of clarity. */
4958 if (htab->root.splt != NULL && found->hash != NULL
4959 && found->hash->root.plt.offset != (bfd_vma) -1)
4960 use_plt = TRUE;
4961
4962 if (found->r_type == R_ARM_THM_CALL)
4963 {
4964 if (found->branch_type == ST_BRANCH_TO_ARM
4965 || use_plt)
4966 force_target_arm = TRUE;
4967 else
4968 force_target_thumb = TRUE;
4969 }
4970 }
4971
4972 /* Check if we have an offending branch instruction. */
4973
4974 if (found && found->non_a8_stub)
4975 /* We've already made a stub for this instruction, e.g.
4976 it's a long branch or a Thumb->ARM stub. Assume that
4977 stub will suffice to work around the A8 erratum (see
4978 setting of always_after_branch above). */
4979 ;
4980 else if (is_bcc)
4981 {
4982 offset = (insn & 0x7ff) << 1;
4983 offset |= (insn & 0x3f0000) >> 4;
4984 offset |= (insn & 0x2000) ? 0x40000 : 0;
4985 offset |= (insn & 0x800) ? 0x80000 : 0;
4986 offset |= (insn & 0x4000000) ? 0x100000 : 0;
4987 if (offset & 0x100000)
4988 offset |= ~ ((bfd_signed_vma) 0xfffff);
4989 stub_type = arm_stub_a8_veneer_b_cond;
4990 }
4991 else if (is_b || is_bl || is_blx)
4992 {
4993 int s = (insn & 0x4000000) != 0;
4994 int j1 = (insn & 0x2000) != 0;
4995 int j2 = (insn & 0x800) != 0;
4996 int i1 = !(j1 ^ s);
4997 int i2 = !(j2 ^ s);
4998
4999 offset = (insn & 0x7ff) << 1;
5000 offset |= (insn & 0x3ff0000) >> 4;
5001 offset |= i2 << 22;
5002 offset |= i1 << 23;
5003 offset |= s << 24;
5004 if (offset & 0x1000000)
5005 offset |= ~ ((bfd_signed_vma) 0xffffff);
5006
5007 if (is_blx)
5008 offset &= ~ ((bfd_signed_vma) 3);
5009
5010 stub_type = is_blx ? arm_stub_a8_veneer_blx :
5011 is_bl ? arm_stub_a8_veneer_bl : arm_stub_a8_veneer_b;
5012 }
5013
5014 if (stub_type != arm_stub_none)
5015 {
5016 bfd_vma pc_for_insn = base_vma + i + 4;
5017
5018 /* The original instruction is a BL, but the target is
5019 an ARM instruction. If we were not making a stub,
5020 the BL would have been converted to a BLX. Use the
5021 BLX stub instead in that case. */
5022 if (htab->use_blx && force_target_arm
5023 && stub_type == arm_stub_a8_veneer_bl)
5024 {
5025 stub_type = arm_stub_a8_veneer_blx;
5026 is_blx = TRUE;
5027 is_bl = FALSE;
5028 }
5029 /* Conversely, if the original instruction was
5030 BLX but the target is Thumb mode, use the BL
5031 stub. */
5032 else if (force_target_thumb
5033 && stub_type == arm_stub_a8_veneer_blx)
5034 {
5035 stub_type = arm_stub_a8_veneer_bl;
5036 is_blx = FALSE;
5037 is_bl = TRUE;
5038 }
5039
5040 if (is_blx)
5041 pc_for_insn &= ~ ((bfd_vma) 3);
5042
5043 /* If we found a relocation, use the proper destination,
5044 not the offset in the (unrelocated) instruction.
5045 Note this is always done if we switched the stub type
5046 above. */
5047 if (found)
5048 offset =
5049 (bfd_signed_vma) (found->destination - pc_for_insn);
5050
5051 /* If the stub will use a Thumb-mode branch to a
5052 PLT target, redirect it to the preceding Thumb
5053 entry point. */
5054 if (stub_type != arm_stub_a8_veneer_blx && use_plt)
5055 offset -= PLT_THUMB_STUB_SIZE;
5056
5057 target = pc_for_insn + offset;
5058
5059 /* The BLX stub is ARM-mode code. Adjust the offset to
5060 take the different PC value (+8 instead of +4) into
5061 account. */
5062 if (stub_type == arm_stub_a8_veneer_blx)
5063 offset += 4;
5064
5065 if (((base_vma + i) & ~0xfff) == (target & ~0xfff))
5066 {
5067 char *stub_name = NULL;
5068
5069 if (num_a8_fixes == a8_fix_table_size)
5070 {
5071 a8_fix_table_size *= 2;
5072 a8_fixes = (struct a8_erratum_fix *)
5073 bfd_realloc (a8_fixes,
5074 sizeof (struct a8_erratum_fix)
5075 * a8_fix_table_size);
5076 }
5077
5078 if (num_a8_fixes < prev_num_a8_fixes)
5079 {
5080 /* If we're doing a subsequent scan,
5081 check if we've found the same fix as
5082 before, and try and reuse the stub
5083 name. */
5084 stub_name = a8_fixes[num_a8_fixes].stub_name;
5085 if ((a8_fixes[num_a8_fixes].section != section)
5086 || (a8_fixes[num_a8_fixes].offset != i))
5087 {
5088 free (stub_name);
5089 stub_name = NULL;
5090 *stub_changed_p = TRUE;
5091 }
5092 }
5093
5094 if (!stub_name)
5095 {
5096 stub_name = (char *) bfd_malloc (8 + 1 + 8 + 1);
5097 if (stub_name != NULL)
5098 sprintf (stub_name, "%x:%x", section->id, i);
5099 }
5100
5101 a8_fixes[num_a8_fixes].input_bfd = input_bfd;
5102 a8_fixes[num_a8_fixes].section = section;
5103 a8_fixes[num_a8_fixes].offset = i;
5104 a8_fixes[num_a8_fixes].addend = offset;
5105 a8_fixes[num_a8_fixes].orig_insn = insn;
5106 a8_fixes[num_a8_fixes].stub_name = stub_name;
5107 a8_fixes[num_a8_fixes].stub_type = stub_type;
5108 a8_fixes[num_a8_fixes].branch_type =
5109 is_blx ? ST_BRANCH_TO_ARM : ST_BRANCH_TO_THUMB;
5110
5111 num_a8_fixes++;
5112 }
5113 }
5114 }
5115
5116 i += insn_32bit ? 4 : 2;
5117 last_was_32bit = insn_32bit;
5118 last_was_branch = is_32bit_branch;
5119 }
5120 }
5121
5122 if (elf_section_data (section)->this_hdr.contents == NULL)
5123 free (contents);
5124 }
5125
5126 *a8_fixes_p = a8_fixes;
5127 *num_a8_fixes_p = num_a8_fixes;
5128 *a8_fix_table_size_p = a8_fix_table_size;
5129
5130 return FALSE;
5131 }
5132
5133 /* Determine and set the size of the stub section for a final link.
5134
5135 The basic idea here is to examine all the relocations looking for
5136 PC-relative calls to a target that is unreachable with a "bl"
5137 instruction. */
5138
5139 bfd_boolean
5140 elf32_arm_size_stubs (bfd *output_bfd,
5141 bfd *stub_bfd,
5142 struct bfd_link_info *info,
5143 bfd_signed_vma group_size,
5144 asection * (*add_stub_section) (const char *, asection *,
5145 unsigned int),
5146 void (*layout_sections_again) (void))
5147 {
5148 bfd_size_type stub_group_size;
5149 bfd_boolean stubs_always_after_branch;
5150 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
5151 struct a8_erratum_fix *a8_fixes = NULL;
5152 unsigned int num_a8_fixes = 0, a8_fix_table_size = 10;
5153 struct a8_erratum_reloc *a8_relocs = NULL;
5154 unsigned int num_a8_relocs = 0, a8_reloc_table_size = 10, i;
5155
5156 if (htab == NULL)
5157 return FALSE;
5158
5159 if (htab->fix_cortex_a8)
5160 {
5161 a8_fixes = (struct a8_erratum_fix *)
5162 bfd_zmalloc (sizeof (struct a8_erratum_fix) * a8_fix_table_size);
5163 a8_relocs = (struct a8_erratum_reloc *)
5164 bfd_zmalloc (sizeof (struct a8_erratum_reloc) * a8_reloc_table_size);
5165 }
5166
5167 /* Propagate mach to stub bfd, because it may not have been
5168 finalized when we created stub_bfd. */
5169 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
5170 bfd_get_mach (output_bfd));
5171
5172 /* Stash our params away. */
5173 htab->stub_bfd = stub_bfd;
5174 htab->add_stub_section = add_stub_section;
5175 htab->layout_sections_again = layout_sections_again;
5176 stubs_always_after_branch = group_size < 0;
5177
5178 /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page
5179 as the first half of a 32-bit branch straddling two 4K pages. This is a
5180 crude way of enforcing that. */
5181 if (htab->fix_cortex_a8)
5182 stubs_always_after_branch = 1;
5183
5184 if (group_size < 0)
5185 stub_group_size = -group_size;
5186 else
5187 stub_group_size = group_size;
5188
5189 if (stub_group_size == 1)
5190 {
5191 /* Default values. */
5192 /* Thumb branch range is +-4MB has to be used as the default
5193 maximum size (a given section can contain both ARM and Thumb
5194 code, so the worst case has to be taken into account).
5195
5196 This value is 24K less than that, which allows for 2025
5197 12-byte stubs. If we exceed that, then we will fail to link.
5198 The user will have to relink with an explicit group size
5199 option. */
5200 stub_group_size = 4170000;
5201 }
5202
5203 group_sections (htab, stub_group_size, stubs_always_after_branch);
5204
5205 /* If we're applying the cortex A8 fix, we need to determine the
5206 program header size now, because we cannot change it later --
5207 that could alter section placements. Notice the A8 erratum fix
5208 ends up requiring the section addresses to remain unchanged
5209 modulo the page size. That's something we cannot represent
5210 inside BFD, and we don't want to force the section alignment to
5211 be the page size. */
5212 if (htab->fix_cortex_a8)
5213 (*htab->layout_sections_again) ();
5214
5215 while (1)
5216 {
5217 bfd *input_bfd;
5218 unsigned int bfd_indx;
5219 asection *stub_sec;
5220 bfd_boolean stub_changed = FALSE;
5221 unsigned prev_num_a8_fixes = num_a8_fixes;
5222
5223 num_a8_fixes = 0;
5224 for (input_bfd = info->input_bfds, bfd_indx = 0;
5225 input_bfd != NULL;
5226 input_bfd = input_bfd->link.next, bfd_indx++)
5227 {
5228 Elf_Internal_Shdr *symtab_hdr;
5229 asection *section;
5230 Elf_Internal_Sym *local_syms = NULL;
5231
5232 if (!is_arm_elf (input_bfd))
5233 continue;
5234
5235 num_a8_relocs = 0;
5236
5237 /* We'll need the symbol table in a second. */
5238 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5239 if (symtab_hdr->sh_info == 0)
5240 continue;
5241
5242 /* Walk over each section attached to the input bfd. */
5243 for (section = input_bfd->sections;
5244 section != NULL;
5245 section = section->next)
5246 {
5247 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
5248
5249 /* If there aren't any relocs, then there's nothing more
5250 to do. */
5251 if ((section->flags & SEC_RELOC) == 0
5252 || section->reloc_count == 0
5253 || (section->flags & SEC_CODE) == 0)
5254 continue;
5255
5256 /* If this section is a link-once section that will be
5257 discarded, then don't create any stubs. */
5258 if (section->output_section == NULL
5259 || section->output_section->owner != output_bfd)
5260 continue;
5261
5262 /* Get the relocs. */
5263 internal_relocs
5264 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
5265 NULL, info->keep_memory);
5266 if (internal_relocs == NULL)
5267 goto error_ret_free_local;
5268
5269 /* Now examine each relocation. */
5270 irela = internal_relocs;
5271 irelaend = irela + section->reloc_count;
5272 for (; irela < irelaend; irela++)
5273 {
5274 unsigned int r_type, r_indx;
5275 enum elf32_arm_stub_type stub_type;
5276 struct elf32_arm_stub_hash_entry *stub_entry;
5277 asection *sym_sec;
5278 bfd_vma sym_value;
5279 bfd_vma destination;
5280 struct elf32_arm_link_hash_entry *hash;
5281 const char *sym_name;
5282 char *stub_name;
5283 const asection *id_sec;
5284 unsigned char st_type;
5285 enum arm_st_branch_type branch_type;
5286 bfd_boolean created_stub = FALSE;
5287
5288 r_type = ELF32_R_TYPE (irela->r_info);
5289 r_indx = ELF32_R_SYM (irela->r_info);
5290
5291 if (r_type >= (unsigned int) R_ARM_max)
5292 {
5293 bfd_set_error (bfd_error_bad_value);
5294 error_ret_free_internal:
5295 if (elf_section_data (section)->relocs == NULL)
5296 free (internal_relocs);
5297 goto error_ret_free_local;
5298 }
5299
5300 hash = NULL;
5301 if (r_indx >= symtab_hdr->sh_info)
5302 hash = elf32_arm_hash_entry
5303 (elf_sym_hashes (input_bfd)
5304 [r_indx - symtab_hdr->sh_info]);
5305
5306 /* Only look for stubs on branch instructions, or
5307 non-relaxed TLSCALL */
5308 if ((r_type != (unsigned int) R_ARM_CALL)
5309 && (r_type != (unsigned int) R_ARM_THM_CALL)
5310 && (r_type != (unsigned int) R_ARM_JUMP24)
5311 && (r_type != (unsigned int) R_ARM_THM_JUMP19)
5312 && (r_type != (unsigned int) R_ARM_THM_XPC22)
5313 && (r_type != (unsigned int) R_ARM_THM_JUMP24)
5314 && (r_type != (unsigned int) R_ARM_PLT32)
5315 && !((r_type == (unsigned int) R_ARM_TLS_CALL
5316 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
5317 && r_type == elf32_arm_tls_transition
5318 (info, r_type, &hash->root)
5319 && ((hash ? hash->tls_type
5320 : (elf32_arm_local_got_tls_type
5321 (input_bfd)[r_indx]))
5322 & GOT_TLS_GDESC) != 0))
5323 continue;
5324
5325 /* Now determine the call target, its name, value,
5326 section. */
5327 sym_sec = NULL;
5328 sym_value = 0;
5329 destination = 0;
5330 sym_name = NULL;
5331
5332 if (r_type == (unsigned int) R_ARM_TLS_CALL
5333 || r_type == (unsigned int) R_ARM_THM_TLS_CALL)
5334 {
5335 /* A non-relaxed TLS call. The target is the
5336 plt-resident trampoline and nothing to do
5337 with the symbol. */
5338 BFD_ASSERT (htab->tls_trampoline > 0);
5339 sym_sec = htab->root.splt;
5340 sym_value = htab->tls_trampoline;
5341 hash = 0;
5342 st_type = STT_FUNC;
5343 branch_type = ST_BRANCH_TO_ARM;
5344 }
5345 else if (!hash)
5346 {
5347 /* It's a local symbol. */
5348 Elf_Internal_Sym *sym;
5349
5350 if (local_syms == NULL)
5351 {
5352 local_syms
5353 = (Elf_Internal_Sym *) symtab_hdr->contents;
5354 if (local_syms == NULL)
5355 local_syms
5356 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
5357 symtab_hdr->sh_info, 0,
5358 NULL, NULL, NULL);
5359 if (local_syms == NULL)
5360 goto error_ret_free_internal;
5361 }
5362
5363 sym = local_syms + r_indx;
5364 if (sym->st_shndx == SHN_UNDEF)
5365 sym_sec = bfd_und_section_ptr;
5366 else if (sym->st_shndx == SHN_ABS)
5367 sym_sec = bfd_abs_section_ptr;
5368 else if (sym->st_shndx == SHN_COMMON)
5369 sym_sec = bfd_com_section_ptr;
5370 else
5371 sym_sec =
5372 bfd_section_from_elf_index (input_bfd, sym->st_shndx);
5373
5374 if (!sym_sec)
5375 /* This is an undefined symbol. It can never
5376 be resolved. */
5377 continue;
5378
5379 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
5380 sym_value = sym->st_value;
5381 destination = (sym_value + irela->r_addend
5382 + sym_sec->output_offset
5383 + sym_sec->output_section->vma);
5384 st_type = ELF_ST_TYPE (sym->st_info);
5385 branch_type = ARM_SYM_BRANCH_TYPE (sym);
5386 sym_name
5387 = bfd_elf_string_from_elf_section (input_bfd,
5388 symtab_hdr->sh_link,
5389 sym->st_name);
5390 }
5391 else
5392 {
5393 /* It's an external symbol. */
5394 while (hash->root.root.type == bfd_link_hash_indirect
5395 || hash->root.root.type == bfd_link_hash_warning)
5396 hash = ((struct elf32_arm_link_hash_entry *)
5397 hash->root.root.u.i.link);
5398
5399 if (hash->root.root.type == bfd_link_hash_defined
5400 || hash->root.root.type == bfd_link_hash_defweak)
5401 {
5402 sym_sec = hash->root.root.u.def.section;
5403 sym_value = hash->root.root.u.def.value;
5404
5405 struct elf32_arm_link_hash_table *globals =
5406 elf32_arm_hash_table (info);
5407
5408 /* For a destination in a shared library,
5409 use the PLT stub as target address to
5410 decide whether a branch stub is
5411 needed. */
5412 if (globals != NULL
5413 && globals->root.splt != NULL
5414 && hash != NULL
5415 && hash->root.plt.offset != (bfd_vma) -1)
5416 {
5417 sym_sec = globals->root.splt;
5418 sym_value = hash->root.plt.offset;
5419 if (sym_sec->output_section != NULL)
5420 destination = (sym_value
5421 + sym_sec->output_offset
5422 + sym_sec->output_section->vma);
5423 }
5424 else if (sym_sec->output_section != NULL)
5425 destination = (sym_value + irela->r_addend
5426 + sym_sec->output_offset
5427 + sym_sec->output_section->vma);
5428 }
5429 else if ((hash->root.root.type == bfd_link_hash_undefined)
5430 || (hash->root.root.type == bfd_link_hash_undefweak))
5431 {
5432 /* For a shared library, use the PLT stub as
5433 target address to decide whether a long
5434 branch stub is needed.
5435 For absolute code, they cannot be handled. */
5436 struct elf32_arm_link_hash_table *globals =
5437 elf32_arm_hash_table (info);
5438
5439 if (globals != NULL
5440 && globals->root.splt != NULL
5441 && hash != NULL
5442 && hash->root.plt.offset != (bfd_vma) -1)
5443 {
5444 sym_sec = globals->root.splt;
5445 sym_value = hash->root.plt.offset;
5446 if (sym_sec->output_section != NULL)
5447 destination = (sym_value
5448 + sym_sec->output_offset
5449 + sym_sec->output_section->vma);
5450 }
5451 else
5452 continue;
5453 }
5454 else
5455 {
5456 bfd_set_error (bfd_error_bad_value);
5457 goto error_ret_free_internal;
5458 }
5459 st_type = hash->root.type;
5460 branch_type = hash->root.target_internal;
5461 sym_name = hash->root.root.root.string;
5462 }
5463
5464 do
5465 {
5466 /* Determine what (if any) linker stub is needed. */
5467 stub_type = arm_type_of_stub (info, section, irela,
5468 st_type, &branch_type,
5469 hash, destination, sym_sec,
5470 input_bfd, sym_name);
5471 if (stub_type == arm_stub_none)
5472 break;
5473
5474 /* Support for grouping stub sections. */
5475 id_sec = htab->stub_group[section->id].link_sec;
5476
5477 /* Get the name of this stub. */
5478 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash,
5479 irela, stub_type);
5480 if (!stub_name)
5481 goto error_ret_free_internal;
5482
5483 /* We've either created a stub for this reloc already,
5484 or we are about to. */
5485 created_stub = TRUE;
5486
5487 stub_entry = arm_stub_hash_lookup
5488 (&htab->stub_hash_table, stub_name,
5489 FALSE, FALSE);
5490 if (stub_entry != NULL)
5491 {
5492 /* The proper stub has already been created. */
5493 free (stub_name);
5494 stub_entry->target_value = sym_value;
5495 break;
5496 }
5497
5498 stub_entry = elf32_arm_add_stub (stub_name, section,
5499 htab);
5500 if (stub_entry == NULL)
5501 {
5502 free (stub_name);
5503 goto error_ret_free_internal;
5504 }
5505
5506 stub_entry->target_value = sym_value;
5507 stub_entry->target_section = sym_sec;
5508 stub_entry->stub_type = stub_type;
5509 stub_entry->h = hash;
5510 stub_entry->branch_type = branch_type;
5511
5512 if (sym_name == NULL)
5513 sym_name = "unnamed";
5514 stub_entry->output_name = (char *)
5515 bfd_alloc (htab->stub_bfd,
5516 sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
5517 + strlen (sym_name));
5518 if (stub_entry->output_name == NULL)
5519 {
5520 free (stub_name);
5521 goto error_ret_free_internal;
5522 }
5523
5524 /* For historical reasons, use the existing names for
5525 ARM-to-Thumb and Thumb-to-ARM stubs. */
5526 if ((r_type == (unsigned int) R_ARM_THM_CALL
5527 || r_type == (unsigned int) R_ARM_THM_JUMP24
5528 || r_type == (unsigned int) R_ARM_THM_JUMP19)
5529 && branch_type == ST_BRANCH_TO_ARM)
5530 sprintf (stub_entry->output_name,
5531 THUMB2ARM_GLUE_ENTRY_NAME, sym_name);
5532 else if ((r_type == (unsigned int) R_ARM_CALL
5533 || r_type == (unsigned int) R_ARM_JUMP24)
5534 && branch_type == ST_BRANCH_TO_THUMB)
5535 sprintf (stub_entry->output_name,
5536 ARM2THUMB_GLUE_ENTRY_NAME, sym_name);
5537 else
5538 sprintf (stub_entry->output_name, STUB_ENTRY_NAME,
5539 sym_name);
5540
5541 stub_changed = TRUE;
5542 }
5543 while (0);
5544
5545 /* Look for relocations which might trigger Cortex-A8
5546 erratum. */
5547 if (htab->fix_cortex_a8
5548 && (r_type == (unsigned int) R_ARM_THM_JUMP24
5549 || r_type == (unsigned int) R_ARM_THM_JUMP19
5550 || r_type == (unsigned int) R_ARM_THM_CALL
5551 || r_type == (unsigned int) R_ARM_THM_XPC22))
5552 {
5553 bfd_vma from = section->output_section->vma
5554 + section->output_offset
5555 + irela->r_offset;
5556
5557 if ((from & 0xfff) == 0xffe)
5558 {
5559 /* Found a candidate. Note we haven't checked the
5560 destination is within 4K here: if we do so (and
5561 don't create an entry in a8_relocs) we can't tell
5562 that a branch should have been relocated when
5563 scanning later. */
5564 if (num_a8_relocs == a8_reloc_table_size)
5565 {
5566 a8_reloc_table_size *= 2;
5567 a8_relocs = (struct a8_erratum_reloc *)
5568 bfd_realloc (a8_relocs,
5569 sizeof (struct a8_erratum_reloc)
5570 * a8_reloc_table_size);
5571 }
5572
5573 a8_relocs[num_a8_relocs].from = from;
5574 a8_relocs[num_a8_relocs].destination = destination;
5575 a8_relocs[num_a8_relocs].r_type = r_type;
5576 a8_relocs[num_a8_relocs].branch_type = branch_type;
5577 a8_relocs[num_a8_relocs].sym_name = sym_name;
5578 a8_relocs[num_a8_relocs].non_a8_stub = created_stub;
5579 a8_relocs[num_a8_relocs].hash = hash;
5580
5581 num_a8_relocs++;
5582 }
5583 }
5584 }
5585
5586 /* We're done with the internal relocs, free them. */
5587 if (elf_section_data (section)->relocs == NULL)
5588 free (internal_relocs);
5589 }
5590
5591 if (htab->fix_cortex_a8)
5592 {
5593 /* Sort relocs which might apply to Cortex-A8 erratum. */
5594 qsort (a8_relocs, num_a8_relocs,
5595 sizeof (struct a8_erratum_reloc),
5596 &a8_reloc_compare);
5597
5598 /* Scan for branches which might trigger Cortex-A8 erratum. */
5599 if (cortex_a8_erratum_scan (input_bfd, info, &a8_fixes,
5600 &num_a8_fixes, &a8_fix_table_size,
5601 a8_relocs, num_a8_relocs,
5602 prev_num_a8_fixes, &stub_changed)
5603 != 0)
5604 goto error_ret_free_local;
5605 }
5606 }
5607
5608 if (prev_num_a8_fixes != num_a8_fixes)
5609 stub_changed = TRUE;
5610
5611 if (!stub_changed)
5612 break;
5613
5614 /* OK, we've added some stubs. Find out the new size of the
5615 stub sections. */
5616 for (stub_sec = htab->stub_bfd->sections;
5617 stub_sec != NULL;
5618 stub_sec = stub_sec->next)
5619 {
5620 /* Ignore non-stub sections. */
5621 if (!strstr (stub_sec->name, STUB_SUFFIX))
5622 continue;
5623
5624 stub_sec->size = 0;
5625 }
5626
5627 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
5628
5629 /* Add Cortex-A8 erratum veneers to stub section sizes too. */
5630 if (htab->fix_cortex_a8)
5631 for (i = 0; i < num_a8_fixes; i++)
5632 {
5633 stub_sec = elf32_arm_create_or_find_stub_sec (NULL,
5634 a8_fixes[i].section, htab);
5635
5636 if (stub_sec == NULL)
5637 goto error_ret_free_local;
5638
5639 stub_sec->size
5640 += find_stub_size_and_template (a8_fixes[i].stub_type, NULL,
5641 NULL);
5642 }
5643
5644
5645 /* Ask the linker to do its stuff. */
5646 (*htab->layout_sections_again) ();
5647 }
5648
5649 /* Add stubs for Cortex-A8 erratum fixes now. */
5650 if (htab->fix_cortex_a8)
5651 {
5652 for (i = 0; i < num_a8_fixes; i++)
5653 {
5654 struct elf32_arm_stub_hash_entry *stub_entry;
5655 char *stub_name = a8_fixes[i].stub_name;
5656 asection *section = a8_fixes[i].section;
5657 unsigned int section_id = a8_fixes[i].section->id;
5658 asection *link_sec = htab->stub_group[section_id].link_sec;
5659 asection *stub_sec = htab->stub_group[section_id].stub_sec;
5660 const insn_sequence *template_sequence;
5661 int template_size, size = 0;
5662
5663 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
5664 TRUE, FALSE);
5665 if (stub_entry == NULL)
5666 {
5667 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
5668 section->owner,
5669 stub_name);
5670 return FALSE;
5671 }
5672
5673 stub_entry->stub_sec = stub_sec;
5674 stub_entry->stub_offset = 0;
5675 stub_entry->id_sec = link_sec;
5676 stub_entry->stub_type = a8_fixes[i].stub_type;
5677 stub_entry->target_section = a8_fixes[i].section;
5678 stub_entry->target_value = a8_fixes[i].offset;
5679 stub_entry->target_addend = a8_fixes[i].addend;
5680 stub_entry->orig_insn = a8_fixes[i].orig_insn;
5681 stub_entry->branch_type = a8_fixes[i].branch_type;
5682
5683 size = find_stub_size_and_template (a8_fixes[i].stub_type,
5684 &template_sequence,
5685 &template_size);
5686
5687 stub_entry->stub_size = size;
5688 stub_entry->stub_template = template_sequence;
5689 stub_entry->stub_template_size = template_size;
5690 }
5691
5692 /* Stash the Cortex-A8 erratum fix array for use later in
5693 elf32_arm_write_section(). */
5694 htab->a8_erratum_fixes = a8_fixes;
5695 htab->num_a8_erratum_fixes = num_a8_fixes;
5696 }
5697 else
5698 {
5699 htab->a8_erratum_fixes = NULL;
5700 htab->num_a8_erratum_fixes = 0;
5701 }
5702 return TRUE;
5703
5704 error_ret_free_local:
5705 return FALSE;
5706 }
5707
5708 /* Build all the stubs associated with the current output file. The
5709 stubs are kept in a hash table attached to the main linker hash
5710 table. We also set up the .plt entries for statically linked PIC
5711 functions here. This function is called via arm_elf_finish in the
5712 linker. */
5713
5714 bfd_boolean
5715 elf32_arm_build_stubs (struct bfd_link_info *info)
5716 {
5717 asection *stub_sec;
5718 struct bfd_hash_table *table;
5719 struct elf32_arm_link_hash_table *htab;
5720
5721 htab = elf32_arm_hash_table (info);
5722 if (htab == NULL)
5723 return FALSE;
5724
5725 for (stub_sec = htab->stub_bfd->sections;
5726 stub_sec != NULL;
5727 stub_sec = stub_sec->next)
5728 {
5729 bfd_size_type size;
5730
5731 /* Ignore non-stub sections. */
5732 if (!strstr (stub_sec->name, STUB_SUFFIX))
5733 continue;
5734
5735 /* Allocate memory to hold the linker stubs. */
5736 size = stub_sec->size;
5737 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
5738 if (stub_sec->contents == NULL && size != 0)
5739 return FALSE;
5740 stub_sec->size = 0;
5741 }
5742
5743 /* Build the stubs as directed by the stub hash table. */
5744 table = &htab->stub_hash_table;
5745 bfd_hash_traverse (table, arm_build_one_stub, info);
5746 if (htab->fix_cortex_a8)
5747 {
5748 /* Place the cortex a8 stubs last. */
5749 htab->fix_cortex_a8 = -1;
5750 bfd_hash_traverse (table, arm_build_one_stub, info);
5751 }
5752
5753 return TRUE;
5754 }
5755
5756 /* Locate the Thumb encoded calling stub for NAME. */
5757
5758 static struct elf_link_hash_entry *
5759 find_thumb_glue (struct bfd_link_info *link_info,
5760 const char *name,
5761 char **error_message)
5762 {
5763 char *tmp_name;
5764 struct elf_link_hash_entry *hash;
5765 struct elf32_arm_link_hash_table *hash_table;
5766
5767 /* We need a pointer to the armelf specific hash table. */
5768 hash_table = elf32_arm_hash_table (link_info);
5769 if (hash_table == NULL)
5770 return NULL;
5771
5772 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
5773 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
5774
5775 BFD_ASSERT (tmp_name);
5776
5777 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
5778
5779 hash = elf_link_hash_lookup
5780 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
5781
5782 if (hash == NULL
5783 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
5784 tmp_name, name) == -1)
5785 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
5786
5787 free (tmp_name);
5788
5789 return hash;
5790 }
5791
5792 /* Locate the ARM encoded calling stub for NAME. */
5793
5794 static struct elf_link_hash_entry *
5795 find_arm_glue (struct bfd_link_info *link_info,
5796 const char *name,
5797 char **error_message)
5798 {
5799 char *tmp_name;
5800 struct elf_link_hash_entry *myh;
5801 struct elf32_arm_link_hash_table *hash_table;
5802
5803 /* We need a pointer to the elfarm specific hash table. */
5804 hash_table = elf32_arm_hash_table (link_info);
5805 if (hash_table == NULL)
5806 return NULL;
5807
5808 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
5809 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
5810
5811 BFD_ASSERT (tmp_name);
5812
5813 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
5814
5815 myh = elf_link_hash_lookup
5816 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
5817
5818 if (myh == NULL
5819 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
5820 tmp_name, name) == -1)
5821 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
5822
5823 free (tmp_name);
5824
5825 return myh;
5826 }
5827
5828 /* ARM->Thumb glue (static images):
5829
5830 .arm
5831 __func_from_arm:
5832 ldr r12, __func_addr
5833 bx r12
5834 __func_addr:
5835 .word func @ behave as if you saw a ARM_32 reloc.
5836
5837 (v5t static images)
5838 .arm
5839 __func_from_arm:
5840 ldr pc, __func_addr
5841 __func_addr:
5842 .word func @ behave as if you saw a ARM_32 reloc.
5843
5844 (relocatable images)
5845 .arm
5846 __func_from_arm:
5847 ldr r12, __func_offset
5848 add r12, r12, pc
5849 bx r12
5850 __func_offset:
5851 .word func - . */
5852
5853 #define ARM2THUMB_STATIC_GLUE_SIZE 12
5854 static const insn32 a2t1_ldr_insn = 0xe59fc000;
5855 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
5856 static const insn32 a2t3_func_addr_insn = 0x00000001;
5857
5858 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
5859 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
5860 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
5861
5862 #define ARM2THUMB_PIC_GLUE_SIZE 16
5863 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
5864 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
5865 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
5866
5867 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
5868
5869 .thumb .thumb
5870 .align 2 .align 2
5871 __func_from_thumb: __func_from_thumb:
5872 bx pc push {r6, lr}
5873 nop ldr r6, __func_addr
5874 .arm mov lr, pc
5875 b func bx r6
5876 .arm
5877 ;; back_to_thumb
5878 ldmia r13! {r6, lr}
5879 bx lr
5880 __func_addr:
5881 .word func */
5882
5883 #define THUMB2ARM_GLUE_SIZE 8
5884 static const insn16 t2a1_bx_pc_insn = 0x4778;
5885 static const insn16 t2a2_noop_insn = 0x46c0;
5886 static const insn32 t2a3_b_insn = 0xea000000;
5887
5888 #define VFP11_ERRATUM_VENEER_SIZE 8
5889 #define STM32L4XX_ERRATUM_LDM_VENEER_SIZE 16
5890 #define STM32L4XX_ERRATUM_VLDM_VENEER_SIZE 24
5891
5892 #define ARM_BX_VENEER_SIZE 12
5893 static const insn32 armbx1_tst_insn = 0xe3100001;
5894 static const insn32 armbx2_moveq_insn = 0x01a0f000;
5895 static const insn32 armbx3_bx_insn = 0xe12fff10;
5896
5897 #ifndef ELFARM_NABI_C_INCLUDED
5898 static void
5899 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
5900 {
5901 asection * s;
5902 bfd_byte * contents;
5903
5904 if (size == 0)
5905 {
5906 /* Do not include empty glue sections in the output. */
5907 if (abfd != NULL)
5908 {
5909 s = bfd_get_linker_section (abfd, name);
5910 if (s != NULL)
5911 s->flags |= SEC_EXCLUDE;
5912 }
5913 return;
5914 }
5915
5916 BFD_ASSERT (abfd != NULL);
5917
5918 s = bfd_get_linker_section (abfd, name);
5919 BFD_ASSERT (s != NULL);
5920
5921 contents = (bfd_byte *) bfd_alloc (abfd, size);
5922
5923 BFD_ASSERT (s->size == size);
5924 s->contents = contents;
5925 }
5926
5927 bfd_boolean
5928 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
5929 {
5930 struct elf32_arm_link_hash_table * globals;
5931
5932 globals = elf32_arm_hash_table (info);
5933 BFD_ASSERT (globals != NULL);
5934
5935 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5936 globals->arm_glue_size,
5937 ARM2THUMB_GLUE_SECTION_NAME);
5938
5939 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5940 globals->thumb_glue_size,
5941 THUMB2ARM_GLUE_SECTION_NAME);
5942
5943 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5944 globals->vfp11_erratum_glue_size,
5945 VFP11_ERRATUM_VENEER_SECTION_NAME);
5946
5947 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5948 globals->stm32l4xx_erratum_glue_size,
5949 STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
5950
5951 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
5952 globals->bx_glue_size,
5953 ARM_BX_GLUE_SECTION_NAME);
5954
5955 return TRUE;
5956 }
5957
5958 /* Allocate space and symbols for calling a Thumb function from Arm mode.
5959 returns the symbol identifying the stub. */
5960
5961 static struct elf_link_hash_entry *
5962 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
5963 struct elf_link_hash_entry * h)
5964 {
5965 const char * name = h->root.root.string;
5966 asection * s;
5967 char * tmp_name;
5968 struct elf_link_hash_entry * myh;
5969 struct bfd_link_hash_entry * bh;
5970 struct elf32_arm_link_hash_table * globals;
5971 bfd_vma val;
5972 bfd_size_type size;
5973
5974 globals = elf32_arm_hash_table (link_info);
5975 BFD_ASSERT (globals != NULL);
5976 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5977
5978 s = bfd_get_linker_section
5979 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
5980
5981 BFD_ASSERT (s != NULL);
5982
5983 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
5984 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
5985
5986 BFD_ASSERT (tmp_name);
5987
5988 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
5989
5990 myh = elf_link_hash_lookup
5991 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5992
5993 if (myh != NULL)
5994 {
5995 /* We've already seen this guy. */
5996 free (tmp_name);
5997 return myh;
5998 }
5999
6000 /* The only trick here is using hash_table->arm_glue_size as the value.
6001 Even though the section isn't allocated yet, this is where we will be
6002 putting it. The +1 on the value marks that the stub has not been
6003 output yet - not that it is a Thumb function. */
6004 bh = NULL;
6005 val = globals->arm_glue_size + 1;
6006 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
6007 tmp_name, BSF_GLOBAL, s, val,
6008 NULL, TRUE, FALSE, &bh);
6009
6010 myh = (struct elf_link_hash_entry *) bh;
6011 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6012 myh->forced_local = 1;
6013
6014 free (tmp_name);
6015
6016 if (bfd_link_pic (link_info)
6017 || globals->root.is_relocatable_executable
6018 || globals->pic_veneer)
6019 size = ARM2THUMB_PIC_GLUE_SIZE;
6020 else if (globals->use_blx)
6021 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
6022 else
6023 size = ARM2THUMB_STATIC_GLUE_SIZE;
6024
6025 s->size += size;
6026 globals->arm_glue_size += size;
6027
6028 return myh;
6029 }
6030
6031 /* Allocate space for ARMv4 BX veneers. */
6032
6033 static void
6034 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
6035 {
6036 asection * s;
6037 struct elf32_arm_link_hash_table *globals;
6038 char *tmp_name;
6039 struct elf_link_hash_entry *myh;
6040 struct bfd_link_hash_entry *bh;
6041 bfd_vma val;
6042
6043 /* BX PC does not need a veneer. */
6044 if (reg == 15)
6045 return;
6046
6047 globals = elf32_arm_hash_table (link_info);
6048 BFD_ASSERT (globals != NULL);
6049 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
6050
6051 /* Check if this veneer has already been allocated. */
6052 if (globals->bx_glue_offset[reg])
6053 return;
6054
6055 s = bfd_get_linker_section
6056 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
6057
6058 BFD_ASSERT (s != NULL);
6059
6060 /* Add symbol for veneer. */
6061 tmp_name = (char *)
6062 bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
6063
6064 BFD_ASSERT (tmp_name);
6065
6066 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
6067
6068 myh = elf_link_hash_lookup
6069 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
6070
6071 BFD_ASSERT (myh == NULL);
6072
6073 bh = NULL;
6074 val = globals->bx_glue_size;
6075 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
6076 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
6077 NULL, TRUE, FALSE, &bh);
6078
6079 myh = (struct elf_link_hash_entry *) bh;
6080 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6081 myh->forced_local = 1;
6082
6083 s->size += ARM_BX_VENEER_SIZE;
6084 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
6085 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
6086 }
6087
6088
6089 /* Add an entry to the code/data map for section SEC. */
6090
6091 static void
6092 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
6093 {
6094 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
6095 unsigned int newidx;
6096
6097 if (sec_data->map == NULL)
6098 {
6099 sec_data->map = (elf32_arm_section_map *)
6100 bfd_malloc (sizeof (elf32_arm_section_map));
6101 sec_data->mapcount = 0;
6102 sec_data->mapsize = 1;
6103 }
6104
6105 newidx = sec_data->mapcount++;
6106
6107 if (sec_data->mapcount > sec_data->mapsize)
6108 {
6109 sec_data->mapsize *= 2;
6110 sec_data->map = (elf32_arm_section_map *)
6111 bfd_realloc_or_free (sec_data->map, sec_data->mapsize
6112 * sizeof (elf32_arm_section_map));
6113 }
6114
6115 if (sec_data->map)
6116 {
6117 sec_data->map[newidx].vma = vma;
6118 sec_data->map[newidx].type = type;
6119 }
6120 }
6121
6122
6123 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
6124 veneers are handled for now. */
6125
6126 static bfd_vma
6127 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
6128 elf32_vfp11_erratum_list *branch,
6129 bfd *branch_bfd,
6130 asection *branch_sec,
6131 unsigned int offset)
6132 {
6133 asection *s;
6134 struct elf32_arm_link_hash_table *hash_table;
6135 char *tmp_name;
6136 struct elf_link_hash_entry *myh;
6137 struct bfd_link_hash_entry *bh;
6138 bfd_vma val;
6139 struct _arm_elf_section_data *sec_data;
6140 elf32_vfp11_erratum_list *newerr;
6141
6142 hash_table = elf32_arm_hash_table (link_info);
6143 BFD_ASSERT (hash_table != NULL);
6144 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
6145
6146 s = bfd_get_linker_section
6147 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
6148
6149 sec_data = elf32_arm_section_data (s);
6150
6151 BFD_ASSERT (s != NULL);
6152
6153 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
6154 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
6155
6156 BFD_ASSERT (tmp_name);
6157
6158 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
6159 hash_table->num_vfp11_fixes);
6160
6161 myh = elf_link_hash_lookup
6162 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6163
6164 BFD_ASSERT (myh == NULL);
6165
6166 bh = NULL;
6167 val = hash_table->vfp11_erratum_glue_size;
6168 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
6169 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
6170 NULL, TRUE, FALSE, &bh);
6171
6172 myh = (struct elf_link_hash_entry *) bh;
6173 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6174 myh->forced_local = 1;
6175
6176 /* Link veneer back to calling location. */
6177 sec_data->erratumcount += 1;
6178 newerr = (elf32_vfp11_erratum_list *)
6179 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
6180
6181 newerr->type = VFP11_ERRATUM_ARM_VENEER;
6182 newerr->vma = -1;
6183 newerr->u.v.branch = branch;
6184 newerr->u.v.id = hash_table->num_vfp11_fixes;
6185 branch->u.b.veneer = newerr;
6186
6187 newerr->next = sec_data->erratumlist;
6188 sec_data->erratumlist = newerr;
6189
6190 /* A symbol for the return from the veneer. */
6191 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
6192 hash_table->num_vfp11_fixes);
6193
6194 myh = elf_link_hash_lookup
6195 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6196
6197 if (myh != NULL)
6198 abort ();
6199
6200 bh = NULL;
6201 val = offset + 4;
6202 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
6203 branch_sec, val, NULL, TRUE, FALSE, &bh);
6204
6205 myh = (struct elf_link_hash_entry *) bh;
6206 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6207 myh->forced_local = 1;
6208
6209 free (tmp_name);
6210
6211 /* Generate a mapping symbol for the veneer section, and explicitly add an
6212 entry for that symbol to the code/data map for the section. */
6213 if (hash_table->vfp11_erratum_glue_size == 0)
6214 {
6215 bh = NULL;
6216 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
6217 ever requires this erratum fix. */
6218 _bfd_generic_link_add_one_symbol (link_info,
6219 hash_table->bfd_of_glue_owner, "$a",
6220 BSF_LOCAL, s, 0, NULL,
6221 TRUE, FALSE, &bh);
6222
6223 myh = (struct elf_link_hash_entry *) bh;
6224 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6225 myh->forced_local = 1;
6226
6227 /* The elf32_arm_init_maps function only cares about symbols from input
6228 BFDs. We must make a note of this generated mapping symbol
6229 ourselves so that code byteswapping works properly in
6230 elf32_arm_write_section. */
6231 elf32_arm_section_map_add (s, 'a', 0);
6232 }
6233
6234 s->size += VFP11_ERRATUM_VENEER_SIZE;
6235 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
6236 hash_table->num_vfp11_fixes++;
6237
6238 /* The offset of the veneer. */
6239 return val;
6240 }
6241
6242 /* Record information about a STM32L4XX STM erratum veneer. Only THUMB-mode
6243 veneers need to be handled because used only in Cortex-M. */
6244
6245 static bfd_vma
6246 record_stm32l4xx_erratum_veneer (struct bfd_link_info *link_info,
6247 elf32_stm32l4xx_erratum_list *branch,
6248 bfd *branch_bfd,
6249 asection *branch_sec,
6250 unsigned int offset,
6251 bfd_size_type veneer_size)
6252 {
6253 asection *s;
6254 struct elf32_arm_link_hash_table *hash_table;
6255 char *tmp_name;
6256 struct elf_link_hash_entry *myh;
6257 struct bfd_link_hash_entry *bh;
6258 bfd_vma val;
6259 struct _arm_elf_section_data *sec_data;
6260 elf32_stm32l4xx_erratum_list *newerr;
6261
6262 hash_table = elf32_arm_hash_table (link_info);
6263 BFD_ASSERT (hash_table != NULL);
6264 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
6265
6266 s = bfd_get_linker_section
6267 (hash_table->bfd_of_glue_owner, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
6268
6269 BFD_ASSERT (s != NULL);
6270
6271 sec_data = elf32_arm_section_data (s);
6272
6273 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
6274 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
6275
6276 BFD_ASSERT (tmp_name);
6277
6278 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
6279 hash_table->num_stm32l4xx_fixes);
6280
6281 myh = elf_link_hash_lookup
6282 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6283
6284 BFD_ASSERT (myh == NULL);
6285
6286 bh = NULL;
6287 val = hash_table->stm32l4xx_erratum_glue_size;
6288 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
6289 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
6290 NULL, TRUE, FALSE, &bh);
6291
6292 myh = (struct elf_link_hash_entry *) bh;
6293 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6294 myh->forced_local = 1;
6295
6296 /* Link veneer back to calling location. */
6297 sec_data->stm32l4xx_erratumcount += 1;
6298 newerr = (elf32_stm32l4xx_erratum_list *)
6299 bfd_zmalloc (sizeof (elf32_stm32l4xx_erratum_list));
6300
6301 newerr->type = STM32L4XX_ERRATUM_VENEER;
6302 newerr->vma = -1;
6303 newerr->u.v.branch = branch;
6304 newerr->u.v.id = hash_table->num_stm32l4xx_fixes;
6305 branch->u.b.veneer = newerr;
6306
6307 newerr->next = sec_data->stm32l4xx_erratumlist;
6308 sec_data->stm32l4xx_erratumlist = newerr;
6309
6310 /* A symbol for the return from the veneer. */
6311 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
6312 hash_table->num_stm32l4xx_fixes);
6313
6314 myh = elf_link_hash_lookup
6315 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
6316
6317 if (myh != NULL)
6318 abort ();
6319
6320 bh = NULL;
6321 val = offset + 4;
6322 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
6323 branch_sec, val, NULL, TRUE, FALSE, &bh);
6324
6325 myh = (struct elf_link_hash_entry *) bh;
6326 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6327 myh->forced_local = 1;
6328
6329 free (tmp_name);
6330
6331 /* Generate a mapping symbol for the veneer section, and explicitly add an
6332 entry for that symbol to the code/data map for the section. */
6333 if (hash_table->stm32l4xx_erratum_glue_size == 0)
6334 {
6335 bh = NULL;
6336 /* Creates a THUMB symbol since there is no other choice. */
6337 _bfd_generic_link_add_one_symbol (link_info,
6338 hash_table->bfd_of_glue_owner, "$t",
6339 BSF_LOCAL, s, 0, NULL,
6340 TRUE, FALSE, &bh);
6341
6342 myh = (struct elf_link_hash_entry *) bh;
6343 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6344 myh->forced_local = 1;
6345
6346 /* The elf32_arm_init_maps function only cares about symbols from input
6347 BFDs. We must make a note of this generated mapping symbol
6348 ourselves so that code byteswapping works properly in
6349 elf32_arm_write_section. */
6350 elf32_arm_section_map_add (s, 't', 0);
6351 }
6352
6353 s->size += veneer_size;
6354 hash_table->stm32l4xx_erratum_glue_size += veneer_size;
6355 hash_table->num_stm32l4xx_fixes++;
6356
6357 /* The offset of the veneer. */
6358 return val;
6359 }
6360
6361 #define ARM_GLUE_SECTION_FLAGS \
6362 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
6363 | SEC_READONLY | SEC_LINKER_CREATED)
6364
6365 /* Create a fake section for use by the ARM backend of the linker. */
6366
6367 static bfd_boolean
6368 arm_make_glue_section (bfd * abfd, const char * name)
6369 {
6370 asection * sec;
6371
6372 sec = bfd_get_linker_section (abfd, name);
6373 if (sec != NULL)
6374 /* Already made. */
6375 return TRUE;
6376
6377 sec = bfd_make_section_anyway_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
6378
6379 if (sec == NULL
6380 || !bfd_set_section_alignment (abfd, sec, 2))
6381 return FALSE;
6382
6383 /* Set the gc mark to prevent the section from being removed by garbage
6384 collection, despite the fact that no relocs refer to this section. */
6385 sec->gc_mark = 1;
6386
6387 return TRUE;
6388 }
6389
6390 /* Set size of .plt entries. This function is called from the
6391 linker scripts in ld/emultempl/{armelf}.em. */
6392
6393 void
6394 bfd_elf32_arm_use_long_plt (void)
6395 {
6396 elf32_arm_use_long_plt_entry = TRUE;
6397 }
6398
6399 /* Add the glue sections to ABFD. This function is called from the
6400 linker scripts in ld/emultempl/{armelf}.em. */
6401
6402 bfd_boolean
6403 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
6404 struct bfd_link_info *info)
6405 {
6406 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
6407 bfd_boolean dostm32l4xx = globals
6408 && globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE;
6409 bfd_boolean addglue;
6410
6411 /* If we are only performing a partial
6412 link do not bother adding the glue. */
6413 if (bfd_link_relocatable (info))
6414 return TRUE;
6415
6416 addglue = arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
6417 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
6418 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
6419 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
6420
6421 if (!dostm32l4xx)
6422 return addglue;
6423
6424 return addglue
6425 && arm_make_glue_section (abfd, STM32L4XX_ERRATUM_VENEER_SECTION_NAME);
6426 }
6427
6428 /* Select a BFD to be used to hold the sections used by the glue code.
6429 This function is called from the linker scripts in ld/emultempl/
6430 {armelf/pe}.em. */
6431
6432 bfd_boolean
6433 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
6434 {
6435 struct elf32_arm_link_hash_table *globals;
6436
6437 /* If we are only performing a partial link
6438 do not bother getting a bfd to hold the glue. */
6439 if (bfd_link_relocatable (info))
6440 return TRUE;
6441
6442 /* Make sure we don't attach the glue sections to a dynamic object. */
6443 BFD_ASSERT (!(abfd->flags & DYNAMIC));
6444
6445 globals = elf32_arm_hash_table (info);
6446 BFD_ASSERT (globals != NULL);
6447
6448 if (globals->bfd_of_glue_owner != NULL)
6449 return TRUE;
6450
6451 /* Save the bfd for later use. */
6452 globals->bfd_of_glue_owner = abfd;
6453
6454 return TRUE;
6455 }
6456
6457 static void
6458 check_use_blx (struct elf32_arm_link_hash_table *globals)
6459 {
6460 int cpu_arch;
6461
6462 cpu_arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
6463 Tag_CPU_arch);
6464
6465 if (globals->fix_arm1176)
6466 {
6467 if (cpu_arch == TAG_CPU_ARCH_V6T2 || cpu_arch > TAG_CPU_ARCH_V6K)
6468 globals->use_blx = 1;
6469 }
6470 else
6471 {
6472 if (cpu_arch > TAG_CPU_ARCH_V4T)
6473 globals->use_blx = 1;
6474 }
6475 }
6476
6477 bfd_boolean
6478 bfd_elf32_arm_process_before_allocation (bfd *abfd,
6479 struct bfd_link_info *link_info)
6480 {
6481 Elf_Internal_Shdr *symtab_hdr;
6482 Elf_Internal_Rela *internal_relocs = NULL;
6483 Elf_Internal_Rela *irel, *irelend;
6484 bfd_byte *contents = NULL;
6485
6486 asection *sec;
6487 struct elf32_arm_link_hash_table *globals;
6488
6489 /* If we are only performing a partial link do not bother
6490 to construct any glue. */
6491 if (bfd_link_relocatable (link_info))
6492 return TRUE;
6493
6494 /* Here we have a bfd that is to be included on the link. We have a
6495 hook to do reloc rummaging, before section sizes are nailed down. */
6496 globals = elf32_arm_hash_table (link_info);
6497 BFD_ASSERT (globals != NULL);
6498
6499 check_use_blx (globals);
6500
6501 if (globals->byteswap_code && !bfd_big_endian (abfd))
6502 {
6503 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
6504 abfd);
6505 return FALSE;
6506 }
6507
6508 /* PR 5398: If we have not decided to include any loadable sections in
6509 the output then we will not have a glue owner bfd. This is OK, it
6510 just means that there is nothing else for us to do here. */
6511 if (globals->bfd_of_glue_owner == NULL)
6512 return TRUE;
6513
6514 /* Rummage around all the relocs and map the glue vectors. */
6515 sec = abfd->sections;
6516
6517 if (sec == NULL)
6518 return TRUE;
6519
6520 for (; sec != NULL; sec = sec->next)
6521 {
6522 if (sec->reloc_count == 0)
6523 continue;
6524
6525 if ((sec->flags & SEC_EXCLUDE) != 0)
6526 continue;
6527
6528 symtab_hdr = & elf_symtab_hdr (abfd);
6529
6530 /* Load the relocs. */
6531 internal_relocs
6532 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
6533
6534 if (internal_relocs == NULL)
6535 goto error_return;
6536
6537 irelend = internal_relocs + sec->reloc_count;
6538 for (irel = internal_relocs; irel < irelend; irel++)
6539 {
6540 long r_type;
6541 unsigned long r_index;
6542
6543 struct elf_link_hash_entry *h;
6544
6545 r_type = ELF32_R_TYPE (irel->r_info);
6546 r_index = ELF32_R_SYM (irel->r_info);
6547
6548 /* These are the only relocation types we care about. */
6549 if ( r_type != R_ARM_PC24
6550 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
6551 continue;
6552
6553 /* Get the section contents if we haven't done so already. */
6554 if (contents == NULL)
6555 {
6556 /* Get cached copy if it exists. */
6557 if (elf_section_data (sec)->this_hdr.contents != NULL)
6558 contents = elf_section_data (sec)->this_hdr.contents;
6559 else
6560 {
6561 /* Go get them off disk. */
6562 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
6563 goto error_return;
6564 }
6565 }
6566
6567 if (r_type == R_ARM_V4BX)
6568 {
6569 int reg;
6570
6571 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
6572 record_arm_bx_glue (link_info, reg);
6573 continue;
6574 }
6575
6576 /* If the relocation is not against a symbol it cannot concern us. */
6577 h = NULL;
6578
6579 /* We don't care about local symbols. */
6580 if (r_index < symtab_hdr->sh_info)
6581 continue;
6582
6583 /* This is an external symbol. */
6584 r_index -= symtab_hdr->sh_info;
6585 h = (struct elf_link_hash_entry *)
6586 elf_sym_hashes (abfd)[r_index];
6587
6588 /* If the relocation is against a static symbol it must be within
6589 the current section and so cannot be a cross ARM/Thumb relocation. */
6590 if (h == NULL)
6591 continue;
6592
6593 /* If the call will go through a PLT entry then we do not need
6594 glue. */
6595 if (globals->root.splt != NULL && h->plt.offset != (bfd_vma) -1)
6596 continue;
6597
6598 switch (r_type)
6599 {
6600 case R_ARM_PC24:
6601 /* This one is a call from arm code. We need to look up
6602 the target of the call. If it is a thumb target, we
6603 insert glue. */
6604 if (h->target_internal == ST_BRANCH_TO_THUMB)
6605 record_arm_to_thumb_glue (link_info, h);
6606 break;
6607
6608 default:
6609 abort ();
6610 }
6611 }
6612
6613 if (contents != NULL
6614 && elf_section_data (sec)->this_hdr.contents != contents)
6615 free (contents);
6616 contents = NULL;
6617
6618 if (internal_relocs != NULL
6619 && elf_section_data (sec)->relocs != internal_relocs)
6620 free (internal_relocs);
6621 internal_relocs = NULL;
6622 }
6623
6624 return TRUE;
6625
6626 error_return:
6627 if (contents != NULL
6628 && elf_section_data (sec)->this_hdr.contents != contents)
6629 free (contents);
6630 if (internal_relocs != NULL
6631 && elf_section_data (sec)->relocs != internal_relocs)
6632 free (internal_relocs);
6633
6634 return FALSE;
6635 }
6636 #endif
6637
6638
6639 /* Initialise maps of ARM/Thumb/data for input BFDs. */
6640
6641 void
6642 bfd_elf32_arm_init_maps (bfd *abfd)
6643 {
6644 Elf_Internal_Sym *isymbuf;
6645 Elf_Internal_Shdr *hdr;
6646 unsigned int i, localsyms;
6647
6648 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
6649 if (! is_arm_elf (abfd))
6650 return;
6651
6652 if ((abfd->flags & DYNAMIC) != 0)
6653 return;
6654
6655 hdr = & elf_symtab_hdr (abfd);
6656 localsyms = hdr->sh_info;
6657
6658 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
6659 should contain the number of local symbols, which should come before any
6660 global symbols. Mapping symbols are always local. */
6661 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
6662 NULL);
6663
6664 /* No internal symbols read? Skip this BFD. */
6665 if (isymbuf == NULL)
6666 return;
6667
6668 for (i = 0; i < localsyms; i++)
6669 {
6670 Elf_Internal_Sym *isym = &isymbuf[i];
6671 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6672 const char *name;
6673
6674 if (sec != NULL
6675 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
6676 {
6677 name = bfd_elf_string_from_elf_section (abfd,
6678 hdr->sh_link, isym->st_name);
6679
6680 if (bfd_is_arm_special_symbol_name (name,
6681 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
6682 elf32_arm_section_map_add (sec, name[1], isym->st_value);
6683 }
6684 }
6685 }
6686
6687
6688 /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly
6689 say what they wanted. */
6690
6691 void
6692 bfd_elf32_arm_set_cortex_a8_fix (bfd *obfd, struct bfd_link_info *link_info)
6693 {
6694 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
6695 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
6696
6697 if (globals == NULL)
6698 return;
6699
6700 if (globals->fix_cortex_a8 == -1)
6701 {
6702 /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */
6703 if (out_attr[Tag_CPU_arch].i == TAG_CPU_ARCH_V7
6704 && (out_attr[Tag_CPU_arch_profile].i == 'A'
6705 || out_attr[Tag_CPU_arch_profile].i == 0))
6706 globals->fix_cortex_a8 = 1;
6707 else
6708 globals->fix_cortex_a8 = 0;
6709 }
6710 }
6711
6712
6713 void
6714 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
6715 {
6716 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
6717 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
6718
6719 if (globals == NULL)
6720 return;
6721 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
6722 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
6723 {
6724 switch (globals->vfp11_fix)
6725 {
6726 case BFD_ARM_VFP11_FIX_DEFAULT:
6727 case BFD_ARM_VFP11_FIX_NONE:
6728 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
6729 break;
6730
6731 default:
6732 /* Give a warning, but do as the user requests anyway. */
6733 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
6734 "workaround is not necessary for target architecture"), obfd);
6735 }
6736 }
6737 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
6738 /* For earlier architectures, we might need the workaround, but do not
6739 enable it by default. If users is running with broken hardware, they
6740 must enable the erratum fix explicitly. */
6741 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
6742 }
6743
6744 void
6745 bfd_elf32_arm_set_stm32l4xx_fix (bfd *obfd, struct bfd_link_info *link_info)
6746 {
6747 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
6748 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
6749
6750 if (globals == NULL)
6751 return;
6752
6753 /* We assume only Cortex-M4 may require the fix. */
6754 if (out_attr[Tag_CPU_arch].i != TAG_CPU_ARCH_V7E_M
6755 || out_attr[Tag_CPU_arch_profile].i != 'M')
6756 {
6757 if (globals->stm32l4xx_fix != BFD_ARM_STM32L4XX_FIX_NONE)
6758 /* Give a warning, but do as the user requests anyway. */
6759 (*_bfd_error_handler)
6760 (_("%B: warning: selected STM32L4XX erratum "
6761 "workaround is not necessary for target architecture"), obfd);
6762 }
6763 }
6764
6765 enum bfd_arm_vfp11_pipe
6766 {
6767 VFP11_FMAC,
6768 VFP11_LS,
6769 VFP11_DS,
6770 VFP11_BAD
6771 };
6772
6773 /* Return a VFP register number. This is encoded as RX:X for single-precision
6774 registers, or X:RX for double-precision registers, where RX is the group of
6775 four bits in the instruction encoding and X is the single extension bit.
6776 RX and X fields are specified using their lowest (starting) bit. The return
6777 value is:
6778
6779 0...31: single-precision registers s0...s31
6780 32...63: double-precision registers d0...d31.
6781
6782 Although X should be zero for VFP11 (encoding d0...d15 only), we might
6783 encounter VFP3 instructions, so we allow the full range for DP registers. */
6784
6785 static unsigned int
6786 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
6787 unsigned int x)
6788 {
6789 if (is_double)
6790 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
6791 else
6792 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
6793 }
6794
6795 /* Set bits in *WMASK according to a register number REG as encoded by
6796 bfd_arm_vfp11_regno(). Ignore d16-d31. */
6797
6798 static void
6799 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
6800 {
6801 if (reg < 32)
6802 *wmask |= 1 << reg;
6803 else if (reg < 48)
6804 *wmask |= 3 << ((reg - 32) * 2);
6805 }
6806
6807 /* Return TRUE if WMASK overwrites anything in REGS. */
6808
6809 static bfd_boolean
6810 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
6811 {
6812 int i;
6813
6814 for (i = 0; i < numregs; i++)
6815 {
6816 unsigned int reg = regs[i];
6817
6818 if (reg < 32 && (wmask & (1 << reg)) != 0)
6819 return TRUE;
6820
6821 reg -= 32;
6822
6823 if (reg >= 16)
6824 continue;
6825
6826 if ((wmask & (3 << (reg * 2))) != 0)
6827 return TRUE;
6828 }
6829
6830 return FALSE;
6831 }
6832
6833 /* In this function, we're interested in two things: finding input registers
6834 for VFP data-processing instructions, and finding the set of registers which
6835 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
6836 hold the written set, so FLDM etc. are easy to deal with (we're only
6837 interested in 32 SP registers or 16 dp registers, due to the VFP version
6838 implemented by the chip in question). DP registers are marked by setting
6839 both SP registers in the write mask). */
6840
6841 static enum bfd_arm_vfp11_pipe
6842 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
6843 int *numregs)
6844 {
6845 enum bfd_arm_vfp11_pipe vpipe = VFP11_BAD;
6846 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
6847
6848 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
6849 {
6850 unsigned int pqrs;
6851 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
6852 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
6853
6854 pqrs = ((insn & 0x00800000) >> 20)
6855 | ((insn & 0x00300000) >> 19)
6856 | ((insn & 0x00000040) >> 6);
6857
6858 switch (pqrs)
6859 {
6860 case 0: /* fmac[sd]. */
6861 case 1: /* fnmac[sd]. */
6862 case 2: /* fmsc[sd]. */
6863 case 3: /* fnmsc[sd]. */
6864 vpipe = VFP11_FMAC;
6865 bfd_arm_vfp11_write_mask (destmask, fd);
6866 regs[0] = fd;
6867 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
6868 regs[2] = fm;
6869 *numregs = 3;
6870 break;
6871
6872 case 4: /* fmul[sd]. */
6873 case 5: /* fnmul[sd]. */
6874 case 6: /* fadd[sd]. */
6875 case 7: /* fsub[sd]. */
6876 vpipe = VFP11_FMAC;
6877 goto vfp_binop;
6878
6879 case 8: /* fdiv[sd]. */
6880 vpipe = VFP11_DS;
6881 vfp_binop:
6882 bfd_arm_vfp11_write_mask (destmask, fd);
6883 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
6884 regs[1] = fm;
6885 *numregs = 2;
6886 break;
6887
6888 case 15: /* extended opcode. */
6889 {
6890 unsigned int extn = ((insn >> 15) & 0x1e)
6891 | ((insn >> 7) & 1);
6892
6893 switch (extn)
6894 {
6895 case 0: /* fcpy[sd]. */
6896 case 1: /* fabs[sd]. */
6897 case 2: /* fneg[sd]. */
6898 case 8: /* fcmp[sd]. */
6899 case 9: /* fcmpe[sd]. */
6900 case 10: /* fcmpz[sd]. */
6901 case 11: /* fcmpez[sd]. */
6902 case 16: /* fuito[sd]. */
6903 case 17: /* fsito[sd]. */
6904 case 24: /* ftoui[sd]. */
6905 case 25: /* ftouiz[sd]. */
6906 case 26: /* ftosi[sd]. */
6907 case 27: /* ftosiz[sd]. */
6908 /* These instructions will not bounce due to underflow. */
6909 *numregs = 0;
6910 vpipe = VFP11_FMAC;
6911 break;
6912
6913 case 3: /* fsqrt[sd]. */
6914 /* fsqrt cannot underflow, but it can (perhaps) overwrite
6915 registers to cause the erratum in previous instructions. */
6916 bfd_arm_vfp11_write_mask (destmask, fd);
6917 vpipe = VFP11_DS;
6918 break;
6919
6920 case 15: /* fcvt{ds,sd}. */
6921 {
6922 int rnum = 0;
6923
6924 bfd_arm_vfp11_write_mask (destmask, fd);
6925
6926 /* Only FCVTSD can underflow. */
6927 if ((insn & 0x100) != 0)
6928 regs[rnum++] = fm;
6929
6930 *numregs = rnum;
6931
6932 vpipe = VFP11_FMAC;
6933 }
6934 break;
6935
6936 default:
6937 return VFP11_BAD;
6938 }
6939 }
6940 break;
6941
6942 default:
6943 return VFP11_BAD;
6944 }
6945 }
6946 /* Two-register transfer. */
6947 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
6948 {
6949 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
6950
6951 if ((insn & 0x100000) == 0)
6952 {
6953 if (is_double)
6954 bfd_arm_vfp11_write_mask (destmask, fm);
6955 else
6956 {
6957 bfd_arm_vfp11_write_mask (destmask, fm);
6958 bfd_arm_vfp11_write_mask (destmask, fm + 1);
6959 }
6960 }
6961
6962 vpipe = VFP11_LS;
6963 }
6964 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
6965 {
6966 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
6967 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
6968
6969 switch (puw)
6970 {
6971 case 0: /* Two-reg transfer. We should catch these above. */
6972 abort ();
6973
6974 case 2: /* fldm[sdx]. */
6975 case 3:
6976 case 5:
6977 {
6978 unsigned int i, offset = insn & 0xff;
6979
6980 if (is_double)
6981 offset >>= 1;
6982
6983 for (i = fd; i < fd + offset; i++)
6984 bfd_arm_vfp11_write_mask (destmask, i);
6985 }
6986 break;
6987
6988 case 4: /* fld[sd]. */
6989 case 6:
6990 bfd_arm_vfp11_write_mask (destmask, fd);
6991 break;
6992
6993 default:
6994 return VFP11_BAD;
6995 }
6996
6997 vpipe = VFP11_LS;
6998 }
6999 /* Single-register transfer. Note L==0. */
7000 else if ((insn & 0x0f100e10) == 0x0e000a10)
7001 {
7002 unsigned int opcode = (insn >> 21) & 7;
7003 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
7004
7005 switch (opcode)
7006 {
7007 case 0: /* fmsr/fmdlr. */
7008 case 1: /* fmdhr. */
7009 /* Mark fmdhr and fmdlr as writing to the whole of the DP
7010 destination register. I don't know if this is exactly right,
7011 but it is the conservative choice. */
7012 bfd_arm_vfp11_write_mask (destmask, fn);
7013 break;
7014
7015 case 7: /* fmxr. */
7016 break;
7017 }
7018
7019 vpipe = VFP11_LS;
7020 }
7021
7022 return vpipe;
7023 }
7024
7025
7026 static int elf32_arm_compare_mapping (const void * a, const void * b);
7027
7028
7029 /* Look for potentially-troublesome code sequences which might trigger the
7030 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
7031 (available from ARM) for details of the erratum. A short version is
7032 described in ld.texinfo. */
7033
7034 bfd_boolean
7035 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
7036 {
7037 asection *sec;
7038 bfd_byte *contents = NULL;
7039 int state = 0;
7040 int regs[3], numregs = 0;
7041 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
7042 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
7043
7044 if (globals == NULL)
7045 return FALSE;
7046
7047 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
7048 The states transition as follows:
7049
7050 0 -> 1 (vector) or 0 -> 2 (scalar)
7051 A VFP FMAC-pipeline instruction has been seen. Fill
7052 regs[0]..regs[numregs-1] with its input operands. Remember this
7053 instruction in 'first_fmac'.
7054
7055 1 -> 2
7056 Any instruction, except for a VFP instruction which overwrites
7057 regs[*].
7058
7059 1 -> 3 [ -> 0 ] or
7060 2 -> 3 [ -> 0 ]
7061 A VFP instruction has been seen which overwrites any of regs[*].
7062 We must make a veneer! Reset state to 0 before examining next
7063 instruction.
7064
7065 2 -> 0
7066 If we fail to match anything in state 2, reset to state 0 and reset
7067 the instruction pointer to the instruction after 'first_fmac'.
7068
7069 If the VFP11 vector mode is in use, there must be at least two unrelated
7070 instructions between anti-dependent VFP11 instructions to properly avoid
7071 triggering the erratum, hence the use of the extra state 1. */
7072
7073 /* If we are only performing a partial link do not bother
7074 to construct any glue. */
7075 if (bfd_link_relocatable (link_info))
7076 return TRUE;
7077
7078 /* Skip if this bfd does not correspond to an ELF image. */
7079 if (! is_arm_elf (abfd))
7080 return TRUE;
7081
7082 /* We should have chosen a fix type by the time we get here. */
7083 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
7084
7085 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
7086 return TRUE;
7087
7088 /* Skip this BFD if it corresponds to an executable or dynamic object. */
7089 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
7090 return TRUE;
7091
7092 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7093 {
7094 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
7095 struct _arm_elf_section_data *sec_data;
7096
7097 /* If we don't have executable progbits, we're not interested in this
7098 section. Also skip if section is to be excluded. */
7099 if (elf_section_type (sec) != SHT_PROGBITS
7100 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
7101 || (sec->flags & SEC_EXCLUDE) != 0
7102 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
7103 || sec->output_section == bfd_abs_section_ptr
7104 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
7105 continue;
7106
7107 sec_data = elf32_arm_section_data (sec);
7108
7109 if (sec_data->mapcount == 0)
7110 continue;
7111
7112 if (elf_section_data (sec)->this_hdr.contents != NULL)
7113 contents = elf_section_data (sec)->this_hdr.contents;
7114 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
7115 goto error_return;
7116
7117 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
7118 elf32_arm_compare_mapping);
7119
7120 for (span = 0; span < sec_data->mapcount; span++)
7121 {
7122 unsigned int span_start = sec_data->map[span].vma;
7123 unsigned int span_end = (span == sec_data->mapcount - 1)
7124 ? sec->size : sec_data->map[span + 1].vma;
7125 char span_type = sec_data->map[span].type;
7126
7127 /* FIXME: Only ARM mode is supported at present. We may need to
7128 support Thumb-2 mode also at some point. */
7129 if (span_type != 'a')
7130 continue;
7131
7132 for (i = span_start; i < span_end;)
7133 {
7134 unsigned int next_i = i + 4;
7135 unsigned int insn = bfd_big_endian (abfd)
7136 ? (contents[i] << 24)
7137 | (contents[i + 1] << 16)
7138 | (contents[i + 2] << 8)
7139 | contents[i + 3]
7140 : (contents[i + 3] << 24)
7141 | (contents[i + 2] << 16)
7142 | (contents[i + 1] << 8)
7143 | contents[i];
7144 unsigned int writemask = 0;
7145 enum bfd_arm_vfp11_pipe vpipe;
7146
7147 switch (state)
7148 {
7149 case 0:
7150 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
7151 &numregs);
7152 /* I'm assuming the VFP11 erratum can trigger with denorm
7153 operands on either the FMAC or the DS pipeline. This might
7154 lead to slightly overenthusiastic veneer insertion. */
7155 if (vpipe == VFP11_FMAC || vpipe == VFP11_DS)
7156 {
7157 state = use_vector ? 1 : 2;
7158 first_fmac = i;
7159 veneer_of_insn = insn;
7160 }
7161 break;
7162
7163 case 1:
7164 {
7165 int other_regs[3], other_numregs;
7166 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
7167 other_regs,
7168 &other_numregs);
7169 if (vpipe != VFP11_BAD
7170 && bfd_arm_vfp11_antidependency (writemask, regs,
7171 numregs))
7172 state = 3;
7173 else
7174 state = 2;
7175 }
7176 break;
7177
7178 case 2:
7179 {
7180 int other_regs[3], other_numregs;
7181 vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
7182 other_regs,
7183 &other_numregs);
7184 if (vpipe != VFP11_BAD
7185 && bfd_arm_vfp11_antidependency (writemask, regs,
7186 numregs))
7187 state = 3;
7188 else
7189 {
7190 state = 0;
7191 next_i = first_fmac + 4;
7192 }
7193 }
7194 break;
7195
7196 case 3:
7197 abort (); /* Should be unreachable. */
7198 }
7199
7200 if (state == 3)
7201 {
7202 elf32_vfp11_erratum_list *newerr =(elf32_vfp11_erratum_list *)
7203 bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
7204
7205 elf32_arm_section_data (sec)->erratumcount += 1;
7206
7207 newerr->u.b.vfp_insn = veneer_of_insn;
7208
7209 switch (span_type)
7210 {
7211 case 'a':
7212 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
7213 break;
7214
7215 default:
7216 abort ();
7217 }
7218
7219 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
7220 first_fmac);
7221
7222 newerr->vma = -1;
7223
7224 newerr->next = sec_data->erratumlist;
7225 sec_data->erratumlist = newerr;
7226
7227 state = 0;
7228 }
7229
7230 i = next_i;
7231 }
7232 }
7233
7234 if (contents != NULL
7235 && elf_section_data (sec)->this_hdr.contents != contents)
7236 free (contents);
7237 contents = NULL;
7238 }
7239
7240 return TRUE;
7241
7242 error_return:
7243 if (contents != NULL
7244 && elf_section_data (sec)->this_hdr.contents != contents)
7245 free (contents);
7246
7247 return FALSE;
7248 }
7249
7250 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
7251 after sections have been laid out, using specially-named symbols. */
7252
7253 void
7254 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
7255 struct bfd_link_info *link_info)
7256 {
7257 asection *sec;
7258 struct elf32_arm_link_hash_table *globals;
7259 char *tmp_name;
7260
7261 if (bfd_link_relocatable (link_info))
7262 return;
7263
7264 /* Skip if this bfd does not correspond to an ELF image. */
7265 if (! is_arm_elf (abfd))
7266 return;
7267
7268 globals = elf32_arm_hash_table (link_info);
7269 if (globals == NULL)
7270 return;
7271
7272 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
7273 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
7274
7275 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7276 {
7277 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
7278 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
7279
7280 for (; errnode != NULL; errnode = errnode->next)
7281 {
7282 struct elf_link_hash_entry *myh;
7283 bfd_vma vma;
7284
7285 switch (errnode->type)
7286 {
7287 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
7288 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
7289 /* Find veneer symbol. */
7290 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
7291 errnode->u.b.veneer->u.v.id);
7292
7293 myh = elf_link_hash_lookup
7294 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7295
7296 if (myh == NULL)
7297 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
7298 "`%s'"), abfd, tmp_name);
7299
7300 vma = myh->root.u.def.section->output_section->vma
7301 + myh->root.u.def.section->output_offset
7302 + myh->root.u.def.value;
7303
7304 errnode->u.b.veneer->vma = vma;
7305 break;
7306
7307 case VFP11_ERRATUM_ARM_VENEER:
7308 case VFP11_ERRATUM_THUMB_VENEER:
7309 /* Find return location. */
7310 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
7311 errnode->u.v.id);
7312
7313 myh = elf_link_hash_lookup
7314 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7315
7316 if (myh == NULL)
7317 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
7318 "`%s'"), abfd, tmp_name);
7319
7320 vma = myh->root.u.def.section->output_section->vma
7321 + myh->root.u.def.section->output_offset
7322 + myh->root.u.def.value;
7323
7324 errnode->u.v.branch->vma = vma;
7325 break;
7326
7327 default:
7328 abort ();
7329 }
7330 }
7331 }
7332
7333 free (tmp_name);
7334 }
7335
7336 /* Find virtual-memory addresses for STM32L4XX erratum veneers and
7337 return locations after sections have been laid out, using
7338 specially-named symbols. */
7339
7340 void
7341 bfd_elf32_arm_stm32l4xx_fix_veneer_locations (bfd *abfd,
7342 struct bfd_link_info *link_info)
7343 {
7344 asection *sec;
7345 struct elf32_arm_link_hash_table *globals;
7346 char *tmp_name;
7347
7348 if (bfd_link_relocatable (link_info))
7349 return;
7350
7351 /* Skip if this bfd does not correspond to an ELF image. */
7352 if (! is_arm_elf (abfd))
7353 return;
7354
7355 globals = elf32_arm_hash_table (link_info);
7356 if (globals == NULL)
7357 return;
7358
7359 tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen
7360 (STM32L4XX_ERRATUM_VENEER_ENTRY_NAME) + 10);
7361
7362 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7363 {
7364 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
7365 elf32_stm32l4xx_erratum_list *errnode = sec_data->stm32l4xx_erratumlist;
7366
7367 for (; errnode != NULL; errnode = errnode->next)
7368 {
7369 struct elf_link_hash_entry *myh;
7370 bfd_vma vma;
7371
7372 switch (errnode->type)
7373 {
7374 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
7375 /* Find veneer symbol. */
7376 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME,
7377 errnode->u.b.veneer->u.v.id);
7378
7379 myh = elf_link_hash_lookup
7380 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7381
7382 if (myh == NULL)
7383 (*_bfd_error_handler) (_("%B: unable to find STM32L4XX veneer "
7384 "`%s'"), abfd, tmp_name);
7385
7386 vma = myh->root.u.def.section->output_section->vma
7387 + myh->root.u.def.section->output_offset
7388 + myh->root.u.def.value;
7389
7390 errnode->u.b.veneer->vma = vma;
7391 break;
7392
7393 case STM32L4XX_ERRATUM_VENEER:
7394 /* Find return location. */
7395 sprintf (tmp_name, STM32L4XX_ERRATUM_VENEER_ENTRY_NAME "_r",
7396 errnode->u.v.id);
7397
7398 myh = elf_link_hash_lookup
7399 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
7400
7401 if (myh == NULL)
7402 (*_bfd_error_handler) (_("%B: unable to find STM32L4XX veneer "
7403 "`%s'"), abfd, tmp_name);
7404
7405 vma = myh->root.u.def.section->output_section->vma
7406 + myh->root.u.def.section->output_offset
7407 + myh->root.u.def.value;
7408
7409 errnode->u.v.branch->vma = vma;
7410 break;
7411
7412 default:
7413 abort ();
7414 }
7415 }
7416 }
7417
7418 free (tmp_name);
7419 }
7420
7421 static inline bfd_boolean
7422 is_thumb2_ldmia (const insn32 insn)
7423 {
7424 /* Encoding T2: LDM<c>.W <Rn>{!},<registers>
7425 1110 - 1000 - 10W1 - rrrr - PM (0) l - llll - llll - llll. */
7426 return (insn & 0xffd02000) == 0xe8900000;
7427 }
7428
7429 static inline bfd_boolean
7430 is_thumb2_ldmdb (const insn32 insn)
7431 {
7432 /* Encoding T1: LDMDB<c> <Rn>{!},<registers>
7433 1110 - 1001 - 00W1 - rrrr - PM (0) l - llll - llll - llll. */
7434 return (insn & 0xffd02000) == 0xe9100000;
7435 }
7436
7437 static inline bfd_boolean
7438 is_thumb2_vldm (const insn32 insn)
7439 {
7440 /* A6.5 Extension register load or store instruction
7441 A7.7.229
7442 We look only for the 32-bit registers case since the DP (64-bit
7443 registers) are not supported for STM32L4XX
7444 Encoding T2 VLDM{mode}<c> <Rn>{!}, <list>
7445 <list> is consecutive 32-bit registers
7446 1110 - 110P - UDW1 - rrrr - vvvv - 1010 - iiii - iiii
7447 if P==0 && U==1 && W==1 && Rn=1101 VPOP
7448 if PUW=010 || PUW=011 || PUW=101 VLDM. */
7449 return
7450 ((insn & 0xfe100f00) == 0xec100a00)
7451 && /* (IA without !). */
7452 (((((insn << 7) >> 28) & 0xd) == 0x4)
7453 /* (IA with !), includes VPOP (when reg number is SP). */
7454 || ((((insn << 7) >> 28) & 0xd) == 0x5)
7455 /* (DB with !). */
7456 || ((((insn << 7) >> 28) & 0xd) == 0x9));
7457 }
7458
7459 /* STM STM32L4XX erratum : This function assumes that it receives an LDM or
7460 VLDM opcode and:
7461 - computes the number and the mode of memory accesses
7462 - decides if the replacement should be done:
7463 . replaces only if > 8-word accesses
7464 . or (testing purposes only) replaces all accesses. */
7465
7466 static bfd_boolean
7467 stm32l4xx_need_create_replacing_stub (const insn32 insn,
7468 bfd_arm_stm32l4xx_fix stm32l4xx_fix)
7469 {
7470 int nb_regs = 0;
7471
7472 /* The field encoding the register list is the same for both LDMIA
7473 and LDMDB encodings. */
7474 if (is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn))
7475 nb_regs = popcount (insn & 0x0000ffff);
7476 else if (is_thumb2_vldm (insn))
7477 nb_regs = (insn & 0xff);
7478
7479 /* DEFAULT mode accounts for the real bug condition situation,
7480 ALL mode inserts stubs for each LDM/VLDM instruction (testing). */
7481 return
7482 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_DEFAULT) ? nb_regs > 8 :
7483 (stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_ALL) ? TRUE : FALSE;
7484 }
7485
7486 /* Look for potentially-troublesome code sequences which might trigger
7487 the STM STM32L4XX erratum. */
7488
7489 bfd_boolean
7490 bfd_elf32_arm_stm32l4xx_erratum_scan (bfd *abfd,
7491 struct bfd_link_info *link_info)
7492 {
7493 asection *sec;
7494 bfd_byte *contents = NULL;
7495 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
7496
7497 if (globals == NULL)
7498 return FALSE;
7499
7500 /* If we are only performing a partial link do not bother
7501 to construct any glue. */
7502 if (bfd_link_relocatable (link_info))
7503 return TRUE;
7504
7505 /* Skip if this bfd does not correspond to an ELF image. */
7506 if (! is_arm_elf (abfd))
7507 return TRUE;
7508
7509 if (globals->stm32l4xx_fix == BFD_ARM_STM32L4XX_FIX_NONE)
7510 return TRUE;
7511
7512 /* Skip this BFD if it corresponds to an executable or dynamic object. */
7513 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
7514 return TRUE;
7515
7516 for (sec = abfd->sections; sec != NULL; sec = sec->next)
7517 {
7518 unsigned int i, span;
7519 struct _arm_elf_section_data *sec_data;
7520
7521 /* If we don't have executable progbits, we're not interested in this
7522 section. Also skip if section is to be excluded. */
7523 if (elf_section_type (sec) != SHT_PROGBITS
7524 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
7525 || (sec->flags & SEC_EXCLUDE) != 0
7526 || sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
7527 || sec->output_section == bfd_abs_section_ptr
7528 || strcmp (sec->name, STM32L4XX_ERRATUM_VENEER_SECTION_NAME) == 0)
7529 continue;
7530
7531 sec_data = elf32_arm_section_data (sec);
7532
7533 if (sec_data->mapcount == 0)
7534 continue;
7535
7536 if (elf_section_data (sec)->this_hdr.contents != NULL)
7537 contents = elf_section_data (sec)->this_hdr.contents;
7538 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
7539 goto error_return;
7540
7541 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
7542 elf32_arm_compare_mapping);
7543
7544 for (span = 0; span < sec_data->mapcount; span++)
7545 {
7546 unsigned int span_start = sec_data->map[span].vma;
7547 unsigned int span_end = (span == sec_data->mapcount - 1)
7548 ? sec->size : sec_data->map[span + 1].vma;
7549 char span_type = sec_data->map[span].type;
7550 int itblock_current_pos = 0;
7551
7552 /* Only Thumb2 mode need be supported with this CM4 specific
7553 code, we should not encounter any arm mode eg span_type
7554 != 'a'. */
7555 if (span_type != 't')
7556 continue;
7557
7558 for (i = span_start; i < span_end;)
7559 {
7560 unsigned int insn = bfd_get_16 (abfd, &contents[i]);
7561 bfd_boolean insn_32bit = FALSE;
7562 bfd_boolean is_ldm = FALSE;
7563 bfd_boolean is_vldm = FALSE;
7564 bfd_boolean is_not_last_in_it_block = FALSE;
7565
7566 /* The first 16-bits of all 32-bit thumb2 instructions start
7567 with opcode[15..13]=0b111 and the encoded op1 can be anything
7568 except opcode[12..11]!=0b00.
7569 See 32-bit Thumb instruction encoding. */
7570 if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000)
7571 insn_32bit = TRUE;
7572
7573 /* Compute the predicate that tells if the instruction
7574 is concerned by the IT block
7575 - Creates an error if there is a ldm that is not
7576 last in the IT block thus cannot be replaced
7577 - Otherwise we can create a branch at the end of the
7578 IT block, it will be controlled naturally by IT
7579 with the proper pseudo-predicate
7580 - So the only interesting predicate is the one that
7581 tells that we are not on the last item of an IT
7582 block. */
7583 if (itblock_current_pos != 0)
7584 is_not_last_in_it_block = !!--itblock_current_pos;
7585
7586 if (insn_32bit)
7587 {
7588 /* Load the rest of the insn (in manual-friendly order). */
7589 insn = (insn << 16) | bfd_get_16 (abfd, &contents[i + 2]);
7590 is_ldm = is_thumb2_ldmia (insn) || is_thumb2_ldmdb (insn);
7591 is_vldm = is_thumb2_vldm (insn);
7592
7593 /* Veneers are created for (v)ldm depending on
7594 option flags and memory accesses conditions; but
7595 if the instruction is not the last instruction of
7596 an IT block, we cannot create a jump there, so we
7597 bail out. */
7598 if ((is_ldm || is_vldm) &&
7599 stm32l4xx_need_create_replacing_stub
7600 (insn, globals->stm32l4xx_fix))
7601 {
7602 if (is_not_last_in_it_block)
7603 {
7604 (*_bfd_error_handler)
7605 /* Note - overlong line used here to allow for translation. */
7606 (_("\
7607 %B(%A+0x%lx): error: multiple load detected in non-last IT block instruction : STM32L4XX veneer cannot be generated.\n"
7608 "Use gcc option -mrestrict-it to generate only one instruction per IT block.\n"),
7609 abfd, sec, (long)i);
7610 }
7611 else
7612 {
7613 elf32_stm32l4xx_erratum_list *newerr =
7614 (elf32_stm32l4xx_erratum_list *)
7615 bfd_zmalloc
7616 (sizeof (elf32_stm32l4xx_erratum_list));
7617
7618 elf32_arm_section_data (sec)
7619 ->stm32l4xx_erratumcount += 1;
7620 newerr->u.b.insn = insn;
7621 /* We create only thumb branches. */
7622 newerr->type =
7623 STM32L4XX_ERRATUM_BRANCH_TO_VENEER;
7624 record_stm32l4xx_erratum_veneer
7625 (link_info, newerr, abfd, sec,
7626 i,
7627 is_ldm ?
7628 STM32L4XX_ERRATUM_LDM_VENEER_SIZE:
7629 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
7630 newerr->vma = -1;
7631 newerr->next = sec_data->stm32l4xx_erratumlist;
7632 sec_data->stm32l4xx_erratumlist = newerr;
7633 }
7634 }
7635 }
7636 else
7637 {
7638 /* A7.7.37 IT p208
7639 IT blocks are only encoded in T1
7640 Encoding T1: IT{x{y{z}}} <firstcond>
7641 1 0 1 1 - 1 1 1 1 - firstcond - mask
7642 if mask = '0000' then see 'related encodings'
7643 We don't deal with UNPREDICTABLE, just ignore these.
7644 There can be no nested IT blocks so an IT block
7645 is naturally a new one for which it is worth
7646 computing its size. */
7647 bfd_boolean is_newitblock = ((insn & 0xff00) == 0xbf00) &&
7648 ((insn & 0x000f) != 0x0000);
7649 /* If we have a new IT block we compute its size. */
7650 if (is_newitblock)
7651 {
7652 /* Compute the number of instructions controlled
7653 by the IT block, it will be used to decide
7654 whether we are inside an IT block or not. */
7655 unsigned int mask = insn & 0x000f;
7656 itblock_current_pos = 4 - ctz (mask);
7657 }
7658 }
7659
7660 i += insn_32bit ? 4 : 2;
7661 }
7662 }
7663
7664 if (contents != NULL
7665 && elf_section_data (sec)->this_hdr.contents != contents)
7666 free (contents);
7667 contents = NULL;
7668 }
7669
7670 return TRUE;
7671
7672 error_return:
7673 if (contents != NULL
7674 && elf_section_data (sec)->this_hdr.contents != contents)
7675 free (contents);
7676
7677 return FALSE;
7678 }
7679
7680 /* Set target relocation values needed during linking. */
7681
7682 void
7683 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
7684 struct bfd_link_info *link_info,
7685 int target1_is_rel,
7686 char * target2_type,
7687 int fix_v4bx,
7688 int use_blx,
7689 bfd_arm_vfp11_fix vfp11_fix,
7690 bfd_arm_stm32l4xx_fix stm32l4xx_fix,
7691 int no_enum_warn, int no_wchar_warn,
7692 int pic_veneer, int fix_cortex_a8,
7693 int fix_arm1176)
7694 {
7695 struct elf32_arm_link_hash_table *globals;
7696
7697 globals = elf32_arm_hash_table (link_info);
7698 if (globals == NULL)
7699 return;
7700
7701 globals->target1_is_rel = target1_is_rel;
7702 if (strcmp (target2_type, "rel") == 0)
7703 globals->target2_reloc = R_ARM_REL32;
7704 else if (strcmp (target2_type, "abs") == 0)
7705 globals->target2_reloc = R_ARM_ABS32;
7706 else if (strcmp (target2_type, "got-rel") == 0)
7707 globals->target2_reloc = R_ARM_GOT_PREL;
7708 else
7709 {
7710 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
7711 target2_type);
7712 }
7713 globals->fix_v4bx = fix_v4bx;
7714 globals->use_blx |= use_blx;
7715 globals->vfp11_fix = vfp11_fix;
7716 globals->stm32l4xx_fix = stm32l4xx_fix;
7717 globals->pic_veneer = pic_veneer;
7718 globals->fix_cortex_a8 = fix_cortex_a8;
7719 globals->fix_arm1176 = fix_arm1176;
7720
7721 BFD_ASSERT (is_arm_elf (output_bfd));
7722 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
7723 elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
7724 }
7725
7726 /* Replace the target offset of a Thumb bl or b.w instruction. */
7727
7728 static void
7729 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
7730 {
7731 bfd_vma upper;
7732 bfd_vma lower;
7733 int reloc_sign;
7734
7735 BFD_ASSERT ((offset & 1) == 0);
7736
7737 upper = bfd_get_16 (abfd, insn);
7738 lower = bfd_get_16 (abfd, insn + 2);
7739 reloc_sign = (offset < 0) ? 1 : 0;
7740 upper = (upper & ~(bfd_vma) 0x7ff)
7741 | ((offset >> 12) & 0x3ff)
7742 | (reloc_sign << 10);
7743 lower = (lower & ~(bfd_vma) 0x2fff)
7744 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
7745 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
7746 | ((offset >> 1) & 0x7ff);
7747 bfd_put_16 (abfd, upper, insn);
7748 bfd_put_16 (abfd, lower, insn + 2);
7749 }
7750
7751 /* Thumb code calling an ARM function. */
7752
7753 static int
7754 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
7755 const char * name,
7756 bfd * input_bfd,
7757 bfd * output_bfd,
7758 asection * input_section,
7759 bfd_byte * hit_data,
7760 asection * sym_sec,
7761 bfd_vma offset,
7762 bfd_signed_vma addend,
7763 bfd_vma val,
7764 char **error_message)
7765 {
7766 asection * s = 0;
7767 bfd_vma my_offset;
7768 long int ret_offset;
7769 struct elf_link_hash_entry * myh;
7770 struct elf32_arm_link_hash_table * globals;
7771
7772 myh = find_thumb_glue (info, name, error_message);
7773 if (myh == NULL)
7774 return FALSE;
7775
7776 globals = elf32_arm_hash_table (info);
7777 BFD_ASSERT (globals != NULL);
7778 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
7779
7780 my_offset = myh->root.u.def.value;
7781
7782 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
7783 THUMB2ARM_GLUE_SECTION_NAME);
7784
7785 BFD_ASSERT (s != NULL);
7786 BFD_ASSERT (s->contents != NULL);
7787 BFD_ASSERT (s->output_section != NULL);
7788
7789 if ((my_offset & 0x01) == 0x01)
7790 {
7791 if (sym_sec != NULL
7792 && sym_sec->owner != NULL
7793 && !INTERWORK_FLAG (sym_sec->owner))
7794 {
7795 (*_bfd_error_handler)
7796 (_("%B(%s): warning: interworking not enabled.\n"
7797 " first occurrence: %B: Thumb call to ARM"),
7798 sym_sec->owner, input_bfd, name);
7799
7800 return FALSE;
7801 }
7802
7803 --my_offset;
7804 myh->root.u.def.value = my_offset;
7805
7806 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
7807 s->contents + my_offset);
7808
7809 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
7810 s->contents + my_offset + 2);
7811
7812 ret_offset =
7813 /* Address of destination of the stub. */
7814 ((bfd_signed_vma) val)
7815 - ((bfd_signed_vma)
7816 /* Offset from the start of the current section
7817 to the start of the stubs. */
7818 (s->output_offset
7819 /* Offset of the start of this stub from the start of the stubs. */
7820 + my_offset
7821 /* Address of the start of the current section. */
7822 + s->output_section->vma)
7823 /* The branch instruction is 4 bytes into the stub. */
7824 + 4
7825 /* ARM branches work from the pc of the instruction + 8. */
7826 + 8);
7827
7828 put_arm_insn (globals, output_bfd,
7829 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
7830 s->contents + my_offset + 4);
7831 }
7832
7833 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
7834
7835 /* Now go back and fix up the original BL insn to point to here. */
7836 ret_offset =
7837 /* Address of where the stub is located. */
7838 (s->output_section->vma + s->output_offset + my_offset)
7839 /* Address of where the BL is located. */
7840 - (input_section->output_section->vma + input_section->output_offset
7841 + offset)
7842 /* Addend in the relocation. */
7843 - addend
7844 /* Biassing for PC-relative addressing. */
7845 - 8;
7846
7847 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
7848
7849 return TRUE;
7850 }
7851
7852 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
7853
7854 static struct elf_link_hash_entry *
7855 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
7856 const char * name,
7857 bfd * input_bfd,
7858 bfd * output_bfd,
7859 asection * sym_sec,
7860 bfd_vma val,
7861 asection * s,
7862 char ** error_message)
7863 {
7864 bfd_vma my_offset;
7865 long int ret_offset;
7866 struct elf_link_hash_entry * myh;
7867 struct elf32_arm_link_hash_table * globals;
7868
7869 myh = find_arm_glue (info, name, error_message);
7870 if (myh == NULL)
7871 return NULL;
7872
7873 globals = elf32_arm_hash_table (info);
7874 BFD_ASSERT (globals != NULL);
7875 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
7876
7877 my_offset = myh->root.u.def.value;
7878
7879 if ((my_offset & 0x01) == 0x01)
7880 {
7881 if (sym_sec != NULL
7882 && sym_sec->owner != NULL
7883 && !INTERWORK_FLAG (sym_sec->owner))
7884 {
7885 (*_bfd_error_handler)
7886 (_("%B(%s): warning: interworking not enabled.\n"
7887 " first occurrence: %B: arm call to thumb"),
7888 sym_sec->owner, input_bfd, name);
7889 }
7890
7891 --my_offset;
7892 myh->root.u.def.value = my_offset;
7893
7894 if (bfd_link_pic (info)
7895 || globals->root.is_relocatable_executable
7896 || globals->pic_veneer)
7897 {
7898 /* For relocatable objects we can't use absolute addresses,
7899 so construct the address from a relative offset. */
7900 /* TODO: If the offset is small it's probably worth
7901 constructing the address with adds. */
7902 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
7903 s->contents + my_offset);
7904 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
7905 s->contents + my_offset + 4);
7906 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
7907 s->contents + my_offset + 8);
7908 /* Adjust the offset by 4 for the position of the add,
7909 and 8 for the pipeline offset. */
7910 ret_offset = (val - (s->output_offset
7911 + s->output_section->vma
7912 + my_offset + 12))
7913 | 1;
7914 bfd_put_32 (output_bfd, ret_offset,
7915 s->contents + my_offset + 12);
7916 }
7917 else if (globals->use_blx)
7918 {
7919 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
7920 s->contents + my_offset);
7921
7922 /* It's a thumb address. Add the low order bit. */
7923 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
7924 s->contents + my_offset + 4);
7925 }
7926 else
7927 {
7928 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
7929 s->contents + my_offset);
7930
7931 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
7932 s->contents + my_offset + 4);
7933
7934 /* It's a thumb address. Add the low order bit. */
7935 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
7936 s->contents + my_offset + 8);
7937
7938 my_offset += 12;
7939 }
7940 }
7941
7942 BFD_ASSERT (my_offset <= globals->arm_glue_size);
7943
7944 return myh;
7945 }
7946
7947 /* Arm code calling a Thumb function. */
7948
7949 static int
7950 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
7951 const char * name,
7952 bfd * input_bfd,
7953 bfd * output_bfd,
7954 asection * input_section,
7955 bfd_byte * hit_data,
7956 asection * sym_sec,
7957 bfd_vma offset,
7958 bfd_signed_vma addend,
7959 bfd_vma val,
7960 char **error_message)
7961 {
7962 unsigned long int tmp;
7963 bfd_vma my_offset;
7964 asection * s;
7965 long int ret_offset;
7966 struct elf_link_hash_entry * myh;
7967 struct elf32_arm_link_hash_table * globals;
7968
7969 globals = elf32_arm_hash_table (info);
7970 BFD_ASSERT (globals != NULL);
7971 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
7972
7973 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
7974 ARM2THUMB_GLUE_SECTION_NAME);
7975 BFD_ASSERT (s != NULL);
7976 BFD_ASSERT (s->contents != NULL);
7977 BFD_ASSERT (s->output_section != NULL);
7978
7979 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
7980 sym_sec, val, s, error_message);
7981 if (!myh)
7982 return FALSE;
7983
7984 my_offset = myh->root.u.def.value;
7985 tmp = bfd_get_32 (input_bfd, hit_data);
7986 tmp = tmp & 0xFF000000;
7987
7988 /* Somehow these are both 4 too far, so subtract 8. */
7989 ret_offset = (s->output_offset
7990 + my_offset
7991 + s->output_section->vma
7992 - (input_section->output_offset
7993 + input_section->output_section->vma
7994 + offset + addend)
7995 - 8);
7996
7997 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
7998
7999 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
8000
8001 return TRUE;
8002 }
8003
8004 /* Populate Arm stub for an exported Thumb function. */
8005
8006 static bfd_boolean
8007 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
8008 {
8009 struct bfd_link_info * info = (struct bfd_link_info *) inf;
8010 asection * s;
8011 struct elf_link_hash_entry * myh;
8012 struct elf32_arm_link_hash_entry *eh;
8013 struct elf32_arm_link_hash_table * globals;
8014 asection *sec;
8015 bfd_vma val;
8016 char *error_message;
8017
8018 eh = elf32_arm_hash_entry (h);
8019 /* Allocate stubs for exported Thumb functions on v4t. */
8020 if (eh->export_glue == NULL)
8021 return TRUE;
8022
8023 globals = elf32_arm_hash_table (info);
8024 BFD_ASSERT (globals != NULL);
8025 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8026
8027 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
8028 ARM2THUMB_GLUE_SECTION_NAME);
8029 BFD_ASSERT (s != NULL);
8030 BFD_ASSERT (s->contents != NULL);
8031 BFD_ASSERT (s->output_section != NULL);
8032
8033 sec = eh->export_glue->root.u.def.section;
8034
8035 BFD_ASSERT (sec->output_section != NULL);
8036
8037 val = eh->export_glue->root.u.def.value + sec->output_offset
8038 + sec->output_section->vma;
8039
8040 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
8041 h->root.u.def.section->owner,
8042 globals->obfd, sec, val, s,
8043 &error_message);
8044 BFD_ASSERT (myh);
8045 return TRUE;
8046 }
8047
8048 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
8049
8050 static bfd_vma
8051 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
8052 {
8053 bfd_byte *p;
8054 bfd_vma glue_addr;
8055 asection *s;
8056 struct elf32_arm_link_hash_table *globals;
8057
8058 globals = elf32_arm_hash_table (info);
8059 BFD_ASSERT (globals != NULL);
8060 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
8061
8062 s = bfd_get_linker_section (globals->bfd_of_glue_owner,
8063 ARM_BX_GLUE_SECTION_NAME);
8064 BFD_ASSERT (s != NULL);
8065 BFD_ASSERT (s->contents != NULL);
8066 BFD_ASSERT (s->output_section != NULL);
8067
8068 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
8069
8070 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
8071
8072 if ((globals->bx_glue_offset[reg] & 1) == 0)
8073 {
8074 p = s->contents + glue_addr;
8075 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
8076 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
8077 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
8078 globals->bx_glue_offset[reg] |= 1;
8079 }
8080
8081 return glue_addr + s->output_section->vma + s->output_offset;
8082 }
8083
8084 /* Generate Arm stubs for exported Thumb symbols. */
8085 static void
8086 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
8087 struct bfd_link_info *link_info)
8088 {
8089 struct elf32_arm_link_hash_table * globals;
8090
8091 if (link_info == NULL)
8092 /* Ignore this if we are not called by the ELF backend linker. */
8093 return;
8094
8095 globals = elf32_arm_hash_table (link_info);
8096 if (globals == NULL)
8097 return;
8098
8099 /* If blx is available then exported Thumb symbols are OK and there is
8100 nothing to do. */
8101 if (globals->use_blx)
8102 return;
8103
8104 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
8105 link_info);
8106 }
8107
8108 /* Reserve space for COUNT dynamic relocations in relocation selection
8109 SRELOC. */
8110
8111 static void
8112 elf32_arm_allocate_dynrelocs (struct bfd_link_info *info, asection *sreloc,
8113 bfd_size_type count)
8114 {
8115 struct elf32_arm_link_hash_table *htab;
8116
8117 htab = elf32_arm_hash_table (info);
8118 BFD_ASSERT (htab->root.dynamic_sections_created);
8119 if (sreloc == NULL)
8120 abort ();
8121 sreloc->size += RELOC_SIZE (htab) * count;
8122 }
8123
8124 /* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is
8125 dynamic, the relocations should go in SRELOC, otherwise they should
8126 go in the special .rel.iplt section. */
8127
8128 static void
8129 elf32_arm_allocate_irelocs (struct bfd_link_info *info, asection *sreloc,
8130 bfd_size_type count)
8131 {
8132 struct elf32_arm_link_hash_table *htab;
8133
8134 htab = elf32_arm_hash_table (info);
8135 if (!htab->root.dynamic_sections_created)
8136 htab->root.irelplt->size += RELOC_SIZE (htab) * count;
8137 else
8138 {
8139 BFD_ASSERT (sreloc != NULL);
8140 sreloc->size += RELOC_SIZE (htab) * count;
8141 }
8142 }
8143
8144 /* Add relocation REL to the end of relocation section SRELOC. */
8145
8146 static void
8147 elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info,
8148 asection *sreloc, Elf_Internal_Rela *rel)
8149 {
8150 bfd_byte *loc;
8151 struct elf32_arm_link_hash_table *htab;
8152
8153 htab = elf32_arm_hash_table (info);
8154 if (!htab->root.dynamic_sections_created
8155 && ELF32_R_TYPE (rel->r_info) == R_ARM_IRELATIVE)
8156 sreloc = htab->root.irelplt;
8157 if (sreloc == NULL)
8158 abort ();
8159 loc = sreloc->contents;
8160 loc += sreloc->reloc_count++ * RELOC_SIZE (htab);
8161 if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size)
8162 abort ();
8163 SWAP_RELOC_OUT (htab) (output_bfd, rel, loc);
8164 }
8165
8166 /* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT.
8167 IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than
8168 to .plt. */
8169
8170 static void
8171 elf32_arm_allocate_plt_entry (struct bfd_link_info *info,
8172 bfd_boolean is_iplt_entry,
8173 union gotplt_union *root_plt,
8174 struct arm_plt_info *arm_plt)
8175 {
8176 struct elf32_arm_link_hash_table *htab;
8177 asection *splt;
8178 asection *sgotplt;
8179
8180 htab = elf32_arm_hash_table (info);
8181
8182 if (is_iplt_entry)
8183 {
8184 splt = htab->root.iplt;
8185 sgotplt = htab->root.igotplt;
8186
8187 /* NaCl uses a special first entry in .iplt too. */
8188 if (htab->nacl_p && splt->size == 0)
8189 splt->size += htab->plt_header_size;
8190
8191 /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */
8192 elf32_arm_allocate_irelocs (info, htab->root.irelplt, 1);
8193 }
8194 else
8195 {
8196 splt = htab->root.splt;
8197 sgotplt = htab->root.sgotplt;
8198
8199 /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */
8200 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
8201
8202 /* If this is the first .plt entry, make room for the special
8203 first entry. */
8204 if (splt->size == 0)
8205 splt->size += htab->plt_header_size;
8206
8207 htab->next_tls_desc_index++;
8208 }
8209
8210 /* Allocate the PLT entry itself, including any leading Thumb stub. */
8211 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
8212 splt->size += PLT_THUMB_STUB_SIZE;
8213 root_plt->offset = splt->size;
8214 splt->size += htab->plt_entry_size;
8215
8216 if (!htab->symbian_p)
8217 {
8218 /* We also need to make an entry in the .got.plt section, which
8219 will be placed in the .got section by the linker script. */
8220 if (is_iplt_entry)
8221 arm_plt->got_offset = sgotplt->size;
8222 else
8223 arm_plt->got_offset = sgotplt->size - 8 * htab->num_tls_desc;
8224 sgotplt->size += 4;
8225 }
8226 }
8227
8228 static bfd_vma
8229 arm_movw_immediate (bfd_vma value)
8230 {
8231 return (value & 0x00000fff) | ((value & 0x0000f000) << 4);
8232 }
8233
8234 static bfd_vma
8235 arm_movt_immediate (bfd_vma value)
8236 {
8237 return ((value & 0x0fff0000) >> 16) | ((value & 0xf0000000) >> 12);
8238 }
8239
8240 /* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1,
8241 the entry lives in .iplt and resolves to (*SYM_VALUE)().
8242 Otherwise, DYNINDX is the index of the symbol in the dynamic
8243 symbol table and SYM_VALUE is undefined.
8244
8245 ROOT_PLT points to the offset of the PLT entry from the start of its
8246 section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific
8247 bookkeeping information.
8248
8249 Returns FALSE if there was a problem. */
8250
8251 static bfd_boolean
8252 elf32_arm_populate_plt_entry (bfd *output_bfd, struct bfd_link_info *info,
8253 union gotplt_union *root_plt,
8254 struct arm_plt_info *arm_plt,
8255 int dynindx, bfd_vma sym_value)
8256 {
8257 struct elf32_arm_link_hash_table *htab;
8258 asection *sgot;
8259 asection *splt;
8260 asection *srel;
8261 bfd_byte *loc;
8262 bfd_vma plt_index;
8263 Elf_Internal_Rela rel;
8264 bfd_vma plt_header_size;
8265 bfd_vma got_header_size;
8266
8267 htab = elf32_arm_hash_table (info);
8268
8269 /* Pick the appropriate sections and sizes. */
8270 if (dynindx == -1)
8271 {
8272 splt = htab->root.iplt;
8273 sgot = htab->root.igotplt;
8274 srel = htab->root.irelplt;
8275
8276 /* There are no reserved entries in .igot.plt, and no special
8277 first entry in .iplt. */
8278 got_header_size = 0;
8279 plt_header_size = 0;
8280 }
8281 else
8282 {
8283 splt = htab->root.splt;
8284 sgot = htab->root.sgotplt;
8285 srel = htab->root.srelplt;
8286
8287 got_header_size = get_elf_backend_data (output_bfd)->got_header_size;
8288 plt_header_size = htab->plt_header_size;
8289 }
8290 BFD_ASSERT (splt != NULL && srel != NULL);
8291
8292 /* Fill in the entry in the procedure linkage table. */
8293 if (htab->symbian_p)
8294 {
8295 BFD_ASSERT (dynindx >= 0);
8296 put_arm_insn (htab, output_bfd,
8297 elf32_arm_symbian_plt_entry[0],
8298 splt->contents + root_plt->offset);
8299 bfd_put_32 (output_bfd,
8300 elf32_arm_symbian_plt_entry[1],
8301 splt->contents + root_plt->offset + 4);
8302
8303 /* Fill in the entry in the .rel.plt section. */
8304 rel.r_offset = (splt->output_section->vma
8305 + splt->output_offset
8306 + root_plt->offset + 4);
8307 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_GLOB_DAT);
8308
8309 /* Get the index in the procedure linkage table which
8310 corresponds to this symbol. This is the index of this symbol
8311 in all the symbols for which we are making plt entries. The
8312 first entry in the procedure linkage table is reserved. */
8313 plt_index = ((root_plt->offset - plt_header_size)
8314 / htab->plt_entry_size);
8315 }
8316 else
8317 {
8318 bfd_vma got_offset, got_address, plt_address;
8319 bfd_vma got_displacement, initial_got_entry;
8320 bfd_byte * ptr;
8321
8322 BFD_ASSERT (sgot != NULL);
8323
8324 /* Get the offset into the .(i)got.plt table of the entry that
8325 corresponds to this function. */
8326 got_offset = (arm_plt->got_offset & -2);
8327
8328 /* Get the index in the procedure linkage table which
8329 corresponds to this symbol. This is the index of this symbol
8330 in all the symbols for which we are making plt entries.
8331 After the reserved .got.plt entries, all symbols appear in
8332 the same order as in .plt. */
8333 plt_index = (got_offset - got_header_size) / 4;
8334
8335 /* Calculate the address of the GOT entry. */
8336 got_address = (sgot->output_section->vma
8337 + sgot->output_offset
8338 + got_offset);
8339
8340 /* ...and the address of the PLT entry. */
8341 plt_address = (splt->output_section->vma
8342 + splt->output_offset
8343 + root_plt->offset);
8344
8345 ptr = splt->contents + root_plt->offset;
8346 if (htab->vxworks_p && bfd_link_pic (info))
8347 {
8348 unsigned int i;
8349 bfd_vma val;
8350
8351 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8352 {
8353 val = elf32_arm_vxworks_shared_plt_entry[i];
8354 if (i == 2)
8355 val |= got_address - sgot->output_section->vma;
8356 if (i == 5)
8357 val |= plt_index * RELOC_SIZE (htab);
8358 if (i == 2 || i == 5)
8359 bfd_put_32 (output_bfd, val, ptr);
8360 else
8361 put_arm_insn (htab, output_bfd, val, ptr);
8362 }
8363 }
8364 else if (htab->vxworks_p)
8365 {
8366 unsigned int i;
8367 bfd_vma val;
8368
8369 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8370 {
8371 val = elf32_arm_vxworks_exec_plt_entry[i];
8372 if (i == 2)
8373 val |= got_address;
8374 if (i == 4)
8375 val |= 0xffffff & -((root_plt->offset + i * 4 + 8) >> 2);
8376 if (i == 5)
8377 val |= plt_index * RELOC_SIZE (htab);
8378 if (i == 2 || i == 5)
8379 bfd_put_32 (output_bfd, val, ptr);
8380 else
8381 put_arm_insn (htab, output_bfd, val, ptr);
8382 }
8383
8384 loc = (htab->srelplt2->contents
8385 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
8386
8387 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
8388 referencing the GOT for this PLT entry. */
8389 rel.r_offset = plt_address + 8;
8390 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
8391 rel.r_addend = got_offset;
8392 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8393 loc += RELOC_SIZE (htab);
8394
8395 /* Create the R_ARM_ABS32 relocation referencing the
8396 beginning of the PLT for this GOT entry. */
8397 rel.r_offset = got_address;
8398 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
8399 rel.r_addend = 0;
8400 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8401 }
8402 else if (htab->nacl_p)
8403 {
8404 /* Calculate the displacement between the PLT slot and the
8405 common tail that's part of the special initial PLT slot. */
8406 int32_t tail_displacement
8407 = ((splt->output_section->vma + splt->output_offset
8408 + ARM_NACL_PLT_TAIL_OFFSET)
8409 - (plt_address + htab->plt_entry_size + 4));
8410 BFD_ASSERT ((tail_displacement & 3) == 0);
8411 tail_displacement >>= 2;
8412
8413 BFD_ASSERT ((tail_displacement & 0xff000000) == 0
8414 || (-tail_displacement & 0xff000000) == 0);
8415
8416 /* Calculate the displacement between the PLT slot and the entry
8417 in the GOT. The offset accounts for the value produced by
8418 adding to pc in the penultimate instruction of the PLT stub. */
8419 got_displacement = (got_address
8420 - (plt_address + htab->plt_entry_size));
8421
8422 /* NaCl does not support interworking at all. */
8423 BFD_ASSERT (!elf32_arm_plt_needs_thumb_stub_p (info, arm_plt));
8424
8425 put_arm_insn (htab, output_bfd,
8426 elf32_arm_nacl_plt_entry[0]
8427 | arm_movw_immediate (got_displacement),
8428 ptr + 0);
8429 put_arm_insn (htab, output_bfd,
8430 elf32_arm_nacl_plt_entry[1]
8431 | arm_movt_immediate (got_displacement),
8432 ptr + 4);
8433 put_arm_insn (htab, output_bfd,
8434 elf32_arm_nacl_plt_entry[2],
8435 ptr + 8);
8436 put_arm_insn (htab, output_bfd,
8437 elf32_arm_nacl_plt_entry[3]
8438 | (tail_displacement & 0x00ffffff),
8439 ptr + 12);
8440 }
8441 else if (using_thumb_only (htab))
8442 {
8443 /* PR ld/16017: Generate thumb only PLT entries. */
8444 if (!using_thumb2 (htab))
8445 {
8446 /* FIXME: We ought to be able to generate thumb-1 PLT
8447 instructions... */
8448 _bfd_error_handler (_("%B: Warning: thumb-1 mode PLT generation not currently supported"),
8449 output_bfd);
8450 return FALSE;
8451 }
8452
8453 /* Calculate the displacement between the PLT slot and the entry in
8454 the GOT. The 12-byte offset accounts for the value produced by
8455 adding to pc in the 3rd instruction of the PLT stub. */
8456 got_displacement = got_address - (plt_address + 12);
8457
8458 /* As we are using 32 bit instructions we have to use 'put_arm_insn'
8459 instead of 'put_thumb_insn'. */
8460 put_arm_insn (htab, output_bfd,
8461 elf32_thumb2_plt_entry[0]
8462 | ((got_displacement & 0x000000ff) << 16)
8463 | ((got_displacement & 0x00000700) << 20)
8464 | ((got_displacement & 0x00000800) >> 1)
8465 | ((got_displacement & 0x0000f000) >> 12),
8466 ptr + 0);
8467 put_arm_insn (htab, output_bfd,
8468 elf32_thumb2_plt_entry[1]
8469 | ((got_displacement & 0x00ff0000) )
8470 | ((got_displacement & 0x07000000) << 4)
8471 | ((got_displacement & 0x08000000) >> 17)
8472 | ((got_displacement & 0xf0000000) >> 28),
8473 ptr + 4);
8474 put_arm_insn (htab, output_bfd,
8475 elf32_thumb2_plt_entry[2],
8476 ptr + 8);
8477 put_arm_insn (htab, output_bfd,
8478 elf32_thumb2_plt_entry[3],
8479 ptr + 12);
8480 }
8481 else
8482 {
8483 /* Calculate the displacement between the PLT slot and the
8484 entry in the GOT. The eight-byte offset accounts for the
8485 value produced by adding to pc in the first instruction
8486 of the PLT stub. */
8487 got_displacement = got_address - (plt_address + 8);
8488
8489 if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt))
8490 {
8491 put_thumb_insn (htab, output_bfd,
8492 elf32_arm_plt_thumb_stub[0], ptr - 4);
8493 put_thumb_insn (htab, output_bfd,
8494 elf32_arm_plt_thumb_stub[1], ptr - 2);
8495 }
8496
8497 if (!elf32_arm_use_long_plt_entry)
8498 {
8499 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
8500
8501 put_arm_insn (htab, output_bfd,
8502 elf32_arm_plt_entry_short[0]
8503 | ((got_displacement & 0x0ff00000) >> 20),
8504 ptr + 0);
8505 put_arm_insn (htab, output_bfd,
8506 elf32_arm_plt_entry_short[1]
8507 | ((got_displacement & 0x000ff000) >> 12),
8508 ptr+ 4);
8509 put_arm_insn (htab, output_bfd,
8510 elf32_arm_plt_entry_short[2]
8511 | (got_displacement & 0x00000fff),
8512 ptr + 8);
8513 #ifdef FOUR_WORD_PLT
8514 bfd_put_32 (output_bfd, elf32_arm_plt_entry_short[3], ptr + 12);
8515 #endif
8516 }
8517 else
8518 {
8519 put_arm_insn (htab, output_bfd,
8520 elf32_arm_plt_entry_long[0]
8521 | ((got_displacement & 0xf0000000) >> 28),
8522 ptr + 0);
8523 put_arm_insn (htab, output_bfd,
8524 elf32_arm_plt_entry_long[1]
8525 | ((got_displacement & 0x0ff00000) >> 20),
8526 ptr + 4);
8527 put_arm_insn (htab, output_bfd,
8528 elf32_arm_plt_entry_long[2]
8529 | ((got_displacement & 0x000ff000) >> 12),
8530 ptr+ 8);
8531 put_arm_insn (htab, output_bfd,
8532 elf32_arm_plt_entry_long[3]
8533 | (got_displacement & 0x00000fff),
8534 ptr + 12);
8535 }
8536 }
8537
8538 /* Fill in the entry in the .rel(a).(i)plt section. */
8539 rel.r_offset = got_address;
8540 rel.r_addend = 0;
8541 if (dynindx == -1)
8542 {
8543 /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE.
8544 The dynamic linker or static executable then calls SYM_VALUE
8545 to determine the correct run-time value of the .igot.plt entry. */
8546 rel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
8547 initial_got_entry = sym_value;
8548 }
8549 else
8550 {
8551 rel.r_info = ELF32_R_INFO (dynindx, R_ARM_JUMP_SLOT);
8552 initial_got_entry = (splt->output_section->vma
8553 + splt->output_offset);
8554 }
8555
8556 /* Fill in the entry in the global offset table. */
8557 bfd_put_32 (output_bfd, initial_got_entry,
8558 sgot->contents + got_offset);
8559 }
8560
8561 if (dynindx == -1)
8562 elf32_arm_add_dynreloc (output_bfd, info, srel, &rel);
8563 else
8564 {
8565 loc = srel->contents + plt_index * RELOC_SIZE (htab);
8566 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8567 }
8568
8569 return TRUE;
8570 }
8571
8572 /* Some relocations map to different relocations depending on the
8573 target. Return the real relocation. */
8574
8575 static int
8576 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
8577 int r_type)
8578 {
8579 switch (r_type)
8580 {
8581 case R_ARM_TARGET1:
8582 if (globals->target1_is_rel)
8583 return R_ARM_REL32;
8584 else
8585 return R_ARM_ABS32;
8586
8587 case R_ARM_TARGET2:
8588 return globals->target2_reloc;
8589
8590 default:
8591 return r_type;
8592 }
8593 }
8594
8595 /* Return the base VMA address which should be subtracted from real addresses
8596 when resolving @dtpoff relocation.
8597 This is PT_TLS segment p_vaddr. */
8598
8599 static bfd_vma
8600 dtpoff_base (struct bfd_link_info *info)
8601 {
8602 /* If tls_sec is NULL, we should have signalled an error already. */
8603 if (elf_hash_table (info)->tls_sec == NULL)
8604 return 0;
8605 return elf_hash_table (info)->tls_sec->vma;
8606 }
8607
8608 /* Return the relocation value for @tpoff relocation
8609 if STT_TLS virtual address is ADDRESS. */
8610
8611 static bfd_vma
8612 tpoff (struct bfd_link_info *info, bfd_vma address)
8613 {
8614 struct elf_link_hash_table *htab = elf_hash_table (info);
8615 bfd_vma base;
8616
8617 /* If tls_sec is NULL, we should have signalled an error already. */
8618 if (htab->tls_sec == NULL)
8619 return 0;
8620 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
8621 return address - htab->tls_sec->vma + base;
8622 }
8623
8624 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
8625 VALUE is the relocation value. */
8626
8627 static bfd_reloc_status_type
8628 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
8629 {
8630 if (value > 0xfff)
8631 return bfd_reloc_overflow;
8632
8633 value |= bfd_get_32 (abfd, data) & 0xfffff000;
8634 bfd_put_32 (abfd, value, data);
8635 return bfd_reloc_ok;
8636 }
8637
8638 /* Handle TLS relaxations. Relaxing is possible for symbols that use
8639 R_ARM_GOTDESC, R_ARM_{,THM_}TLS_CALL or
8640 R_ARM_{,THM_}TLS_DESCSEQ relocations, during a static link.
8641
8642 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
8643 is to then call final_link_relocate. Return other values in the
8644 case of error.
8645
8646 FIXME:When --emit-relocs is in effect, we'll emit relocs describing
8647 the pre-relaxed code. It would be nice if the relocs were updated
8648 to match the optimization. */
8649
8650 static bfd_reloc_status_type
8651 elf32_arm_tls_relax (struct elf32_arm_link_hash_table *globals,
8652 bfd *input_bfd, asection *input_sec, bfd_byte *contents,
8653 Elf_Internal_Rela *rel, unsigned long is_local)
8654 {
8655 unsigned long insn;
8656
8657 switch (ELF32_R_TYPE (rel->r_info))
8658 {
8659 default:
8660 return bfd_reloc_notsupported;
8661
8662 case R_ARM_TLS_GOTDESC:
8663 if (is_local)
8664 insn = 0;
8665 else
8666 {
8667 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8668 if (insn & 1)
8669 insn -= 5; /* THUMB */
8670 else
8671 insn -= 8; /* ARM */
8672 }
8673 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8674 return bfd_reloc_continue;
8675
8676 case R_ARM_THM_TLS_DESCSEQ:
8677 /* Thumb insn. */
8678 insn = bfd_get_16 (input_bfd, contents + rel->r_offset);
8679 if ((insn & 0xff78) == 0x4478) /* add rx, pc */
8680 {
8681 if (is_local)
8682 /* nop */
8683 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
8684 }
8685 else if ((insn & 0xffc0) == 0x6840) /* ldr rx,[ry,#4] */
8686 {
8687 if (is_local)
8688 /* nop */
8689 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
8690 else
8691 /* ldr rx,[ry] */
8692 bfd_put_16 (input_bfd, insn & 0xf83f, contents + rel->r_offset);
8693 }
8694 else if ((insn & 0xff87) == 0x4780) /* blx rx */
8695 {
8696 if (is_local)
8697 /* nop */
8698 bfd_put_16 (input_bfd, 0x46c0, contents + rel->r_offset);
8699 else
8700 /* mov r0, rx */
8701 bfd_put_16 (input_bfd, 0x4600 | (insn & 0x78),
8702 contents + rel->r_offset);
8703 }
8704 else
8705 {
8706 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
8707 /* It's a 32 bit instruction, fetch the rest of it for
8708 error generation. */
8709 insn = (insn << 16)
8710 | bfd_get_16 (input_bfd, contents + rel->r_offset + 2);
8711 (*_bfd_error_handler)
8712 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' in TLS trampoline"),
8713 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
8714 return bfd_reloc_notsupported;
8715 }
8716 break;
8717
8718 case R_ARM_TLS_DESCSEQ:
8719 /* arm insn. */
8720 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8721 if ((insn & 0xffff0ff0) == 0xe08f0000) /* add rx,pc,ry */
8722 {
8723 if (is_local)
8724 /* mov rx, ry */
8725 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xffff),
8726 contents + rel->r_offset);
8727 }
8728 else if ((insn & 0xfff00fff) == 0xe5900004) /* ldr rx,[ry,#4]*/
8729 {
8730 if (is_local)
8731 /* nop */
8732 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
8733 else
8734 /* ldr rx,[ry] */
8735 bfd_put_32 (input_bfd, insn & 0xfffff000,
8736 contents + rel->r_offset);
8737 }
8738 else if ((insn & 0xfffffff0) == 0xe12fff30) /* blx rx */
8739 {
8740 if (is_local)
8741 /* nop */
8742 bfd_put_32 (input_bfd, 0xe1a00000, contents + rel->r_offset);
8743 else
8744 /* mov r0, rx */
8745 bfd_put_32 (input_bfd, 0xe1a00000 | (insn & 0xf),
8746 contents + rel->r_offset);
8747 }
8748 else
8749 {
8750 (*_bfd_error_handler)
8751 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' in TLS trampoline"),
8752 input_bfd, input_sec, (unsigned long)rel->r_offset, insn);
8753 return bfd_reloc_notsupported;
8754 }
8755 break;
8756
8757 case R_ARM_TLS_CALL:
8758 /* GD->IE relaxation, turn the instruction into 'nop' or
8759 'ldr r0, [pc,r0]' */
8760 insn = is_local ? 0xe1a00000 : 0xe79f0000;
8761 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8762 break;
8763
8764 case R_ARM_THM_TLS_CALL:
8765 /* GD->IE relaxation. */
8766 if (!is_local)
8767 /* add r0,pc; ldr r0, [r0] */
8768 insn = 0x44786800;
8769 else if (arch_has_thumb2_nop (globals))
8770 /* nop.w */
8771 insn = 0xf3af8000;
8772 else
8773 /* nop; nop */
8774 insn = 0xbf00bf00;
8775
8776 bfd_put_16 (input_bfd, insn >> 16, contents + rel->r_offset);
8777 bfd_put_16 (input_bfd, insn & 0xffff, contents + rel->r_offset + 2);
8778 break;
8779 }
8780 return bfd_reloc_ok;
8781 }
8782
8783 /* For a given value of n, calculate the value of G_n as required to
8784 deal with group relocations. We return it in the form of an
8785 encoded constant-and-rotation, together with the final residual. If n is
8786 specified as less than zero, then final_residual is filled with the
8787 input value and no further action is performed. */
8788
8789 static bfd_vma
8790 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
8791 {
8792 int current_n;
8793 bfd_vma g_n;
8794 bfd_vma encoded_g_n = 0;
8795 bfd_vma residual = value; /* Also known as Y_n. */
8796
8797 for (current_n = 0; current_n <= n; current_n++)
8798 {
8799 int shift;
8800
8801 /* Calculate which part of the value to mask. */
8802 if (residual == 0)
8803 shift = 0;
8804 else
8805 {
8806 int msb;
8807
8808 /* Determine the most significant bit in the residual and
8809 align the resulting value to a 2-bit boundary. */
8810 for (msb = 30; msb >= 0; msb -= 2)
8811 if (residual & (3 << msb))
8812 break;
8813
8814 /* The desired shift is now (msb - 6), or zero, whichever
8815 is the greater. */
8816 shift = msb - 6;
8817 if (shift < 0)
8818 shift = 0;
8819 }
8820
8821 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
8822 g_n = residual & (0xff << shift);
8823 encoded_g_n = (g_n >> shift)
8824 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
8825
8826 /* Calculate the residual for the next time around. */
8827 residual &= ~g_n;
8828 }
8829
8830 *final_residual = residual;
8831
8832 return encoded_g_n;
8833 }
8834
8835 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
8836 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
8837
8838 static int
8839 identify_add_or_sub (bfd_vma insn)
8840 {
8841 int opcode = insn & 0x1e00000;
8842
8843 if (opcode == 1 << 23) /* ADD */
8844 return 1;
8845
8846 if (opcode == 1 << 22) /* SUB */
8847 return -1;
8848
8849 return 0;
8850 }
8851
8852 /* Perform a relocation as part of a final link. */
8853
8854 static bfd_reloc_status_type
8855 elf32_arm_final_link_relocate (reloc_howto_type * howto,
8856 bfd * input_bfd,
8857 bfd * output_bfd,
8858 asection * input_section,
8859 bfd_byte * contents,
8860 Elf_Internal_Rela * rel,
8861 bfd_vma value,
8862 struct bfd_link_info * info,
8863 asection * sym_sec,
8864 const char * sym_name,
8865 unsigned char st_type,
8866 enum arm_st_branch_type branch_type,
8867 struct elf_link_hash_entry * h,
8868 bfd_boolean * unresolved_reloc_p,
8869 char ** error_message)
8870 {
8871 unsigned long r_type = howto->type;
8872 unsigned long r_symndx;
8873 bfd_byte * hit_data = contents + rel->r_offset;
8874 bfd_vma * local_got_offsets;
8875 bfd_vma * local_tlsdesc_gotents;
8876 asection * sgot;
8877 asection * splt;
8878 asection * sreloc = NULL;
8879 asection * srelgot;
8880 bfd_vma addend;
8881 bfd_signed_vma signed_addend;
8882 unsigned char dynreloc_st_type;
8883 bfd_vma dynreloc_value;
8884 struct elf32_arm_link_hash_table * globals;
8885 struct elf32_arm_link_hash_entry *eh;
8886 union gotplt_union *root_plt;
8887 struct arm_plt_info *arm_plt;
8888 bfd_vma plt_offset;
8889 bfd_vma gotplt_offset;
8890 bfd_boolean has_iplt_entry;
8891
8892 globals = elf32_arm_hash_table (info);
8893 if (globals == NULL)
8894 return bfd_reloc_notsupported;
8895
8896 BFD_ASSERT (is_arm_elf (input_bfd));
8897
8898 /* Some relocation types map to different relocations depending on the
8899 target. We pick the right one here. */
8900 r_type = arm_real_reloc_type (globals, r_type);
8901
8902 /* It is possible to have linker relaxations on some TLS access
8903 models. Update our information here. */
8904 r_type = elf32_arm_tls_transition (info, r_type, h);
8905
8906 if (r_type != howto->type)
8907 howto = elf32_arm_howto_from_type (r_type);
8908
8909 eh = (struct elf32_arm_link_hash_entry *) h;
8910 sgot = globals->root.sgot;
8911 local_got_offsets = elf_local_got_offsets (input_bfd);
8912 local_tlsdesc_gotents = elf32_arm_local_tlsdesc_gotent (input_bfd);
8913
8914 if (globals->root.dynamic_sections_created)
8915 srelgot = globals->root.srelgot;
8916 else
8917 srelgot = NULL;
8918
8919 r_symndx = ELF32_R_SYM (rel->r_info);
8920
8921 if (globals->use_rel)
8922 {
8923 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
8924
8925 if (addend & ((howto->src_mask + 1) >> 1))
8926 {
8927 signed_addend = -1;
8928 signed_addend &= ~ howto->src_mask;
8929 signed_addend |= addend;
8930 }
8931 else
8932 signed_addend = addend;
8933 }
8934 else
8935 addend = signed_addend = rel->r_addend;
8936
8937 /* ST_BRANCH_TO_ARM is nonsense to thumb-only targets when we
8938 are resolving a function call relocation. */
8939 if (using_thumb_only (globals)
8940 && (r_type == R_ARM_THM_CALL
8941 || r_type == R_ARM_THM_JUMP24)
8942 && branch_type == ST_BRANCH_TO_ARM)
8943 branch_type = ST_BRANCH_TO_THUMB;
8944
8945 /* Record the symbol information that should be used in dynamic
8946 relocations. */
8947 dynreloc_st_type = st_type;
8948 dynreloc_value = value;
8949 if (branch_type == ST_BRANCH_TO_THUMB)
8950 dynreloc_value |= 1;
8951
8952 /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and
8953 VALUE appropriately for relocations that we resolve at link time. */
8954 has_iplt_entry = FALSE;
8955 if (elf32_arm_get_plt_info (input_bfd, eh, r_symndx, &root_plt, &arm_plt)
8956 && root_plt->offset != (bfd_vma) -1)
8957 {
8958 plt_offset = root_plt->offset;
8959 gotplt_offset = arm_plt->got_offset;
8960
8961 if (h == NULL || eh->is_iplt)
8962 {
8963 has_iplt_entry = TRUE;
8964 splt = globals->root.iplt;
8965
8966 /* Populate .iplt entries here, because not all of them will
8967 be seen by finish_dynamic_symbol. The lower bit is set if
8968 we have already populated the entry. */
8969 if (plt_offset & 1)
8970 plt_offset--;
8971 else
8972 {
8973 if (elf32_arm_populate_plt_entry (output_bfd, info, root_plt, arm_plt,
8974 -1, dynreloc_value))
8975 root_plt->offset |= 1;
8976 else
8977 return bfd_reloc_notsupported;
8978 }
8979
8980 /* Static relocations always resolve to the .iplt entry. */
8981 st_type = STT_FUNC;
8982 value = (splt->output_section->vma
8983 + splt->output_offset
8984 + plt_offset);
8985 branch_type = ST_BRANCH_TO_ARM;
8986
8987 /* If there are non-call relocations that resolve to the .iplt
8988 entry, then all dynamic ones must too. */
8989 if (arm_plt->noncall_refcount != 0)
8990 {
8991 dynreloc_st_type = st_type;
8992 dynreloc_value = value;
8993 }
8994 }
8995 else
8996 /* We populate the .plt entry in finish_dynamic_symbol. */
8997 splt = globals->root.splt;
8998 }
8999 else
9000 {
9001 splt = NULL;
9002 plt_offset = (bfd_vma) -1;
9003 gotplt_offset = (bfd_vma) -1;
9004 }
9005
9006 switch (r_type)
9007 {
9008 case R_ARM_NONE:
9009 /* We don't need to find a value for this symbol. It's just a
9010 marker. */
9011 *unresolved_reloc_p = FALSE;
9012 return bfd_reloc_ok;
9013
9014 case R_ARM_ABS12:
9015 if (!globals->vxworks_p)
9016 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
9017
9018 case R_ARM_PC24:
9019 case R_ARM_ABS32:
9020 case R_ARM_ABS32_NOI:
9021 case R_ARM_REL32:
9022 case R_ARM_REL32_NOI:
9023 case R_ARM_CALL:
9024 case R_ARM_JUMP24:
9025 case R_ARM_XPC25:
9026 case R_ARM_PREL31:
9027 case R_ARM_PLT32:
9028 /* Handle relocations which should use the PLT entry. ABS32/REL32
9029 will use the symbol's value, which may point to a PLT entry, but we
9030 don't need to handle that here. If we created a PLT entry, all
9031 branches in this object should go to it, except if the PLT is too
9032 far away, in which case a long branch stub should be inserted. */
9033 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
9034 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI
9035 && r_type != R_ARM_CALL
9036 && r_type != R_ARM_JUMP24
9037 && r_type != R_ARM_PLT32)
9038 && plt_offset != (bfd_vma) -1)
9039 {
9040 /* If we've created a .plt section, and assigned a PLT entry
9041 to this function, it must either be a STT_GNU_IFUNC reference
9042 or not be known to bind locally. In other cases, we should
9043 have cleared the PLT entry by now. */
9044 BFD_ASSERT (has_iplt_entry || !SYMBOL_CALLS_LOCAL (info, h));
9045
9046 value = (splt->output_section->vma
9047 + splt->output_offset
9048 + plt_offset);
9049 *unresolved_reloc_p = FALSE;
9050 return _bfd_final_link_relocate (howto, input_bfd, input_section,
9051 contents, rel->r_offset, value,
9052 rel->r_addend);
9053 }
9054
9055 /* When generating a shared object or relocatable executable, these
9056 relocations are copied into the output file to be resolved at
9057 run time. */
9058 if ((bfd_link_pic (info)
9059 || globals->root.is_relocatable_executable)
9060 && (input_section->flags & SEC_ALLOC)
9061 && !(globals->vxworks_p
9062 && strcmp (input_section->output_section->name,
9063 ".tls_vars") == 0)
9064 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
9065 || !SYMBOL_CALLS_LOCAL (info, h))
9066 && !(input_bfd == globals->stub_bfd
9067 && strstr (input_section->name, STUB_SUFFIX))
9068 && (h == NULL
9069 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9070 || h->root.type != bfd_link_hash_undefweak)
9071 && r_type != R_ARM_PC24
9072 && r_type != R_ARM_CALL
9073 && r_type != R_ARM_JUMP24
9074 && r_type != R_ARM_PREL31
9075 && r_type != R_ARM_PLT32)
9076 {
9077 Elf_Internal_Rela outrel;
9078 bfd_boolean skip, relocate;
9079
9080 if ((r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
9081 && !h->def_regular)
9082 {
9083 char *v = _("shared object");
9084
9085 if (bfd_link_executable (info))
9086 v = _("PIE executable");
9087
9088 (*_bfd_error_handler)
9089 (_("%B: relocation %s against external or undefined symbol `%s'"
9090 " can not be used when making a %s; recompile with -fPIC"), input_bfd,
9091 elf32_arm_howto_table_1[r_type].name, h->root.root.string, v);
9092 return bfd_reloc_notsupported;
9093 }
9094
9095 *unresolved_reloc_p = FALSE;
9096
9097 if (sreloc == NULL && globals->root.dynamic_sections_created)
9098 {
9099 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
9100 ! globals->use_rel);
9101
9102 if (sreloc == NULL)
9103 return bfd_reloc_notsupported;
9104 }
9105
9106 skip = FALSE;
9107 relocate = FALSE;
9108
9109 outrel.r_addend = addend;
9110 outrel.r_offset =
9111 _bfd_elf_section_offset (output_bfd, info, input_section,
9112 rel->r_offset);
9113 if (outrel.r_offset == (bfd_vma) -1)
9114 skip = TRUE;
9115 else if (outrel.r_offset == (bfd_vma) -2)
9116 skip = TRUE, relocate = TRUE;
9117 outrel.r_offset += (input_section->output_section->vma
9118 + input_section->output_offset);
9119
9120 if (skip)
9121 memset (&outrel, 0, sizeof outrel);
9122 else if (h != NULL
9123 && h->dynindx != -1
9124 && (!bfd_link_pic (info)
9125 || !SYMBOLIC_BIND (info, h)
9126 || !h->def_regular))
9127 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
9128 else
9129 {
9130 int symbol;
9131
9132 /* This symbol is local, or marked to become local. */
9133 BFD_ASSERT (r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI);
9134 if (globals->symbian_p)
9135 {
9136 asection *osec;
9137
9138 /* On Symbian OS, the data segment and text segement
9139 can be relocated independently. Therefore, we
9140 must indicate the segment to which this
9141 relocation is relative. The BPABI allows us to
9142 use any symbol in the right segment; we just use
9143 the section symbol as it is convenient. (We
9144 cannot use the symbol given by "h" directly as it
9145 will not appear in the dynamic symbol table.)
9146
9147 Note that the dynamic linker ignores the section
9148 symbol value, so we don't subtract osec->vma
9149 from the emitted reloc addend. */
9150 if (sym_sec)
9151 osec = sym_sec->output_section;
9152 else
9153 osec = input_section->output_section;
9154 symbol = elf_section_data (osec)->dynindx;
9155 if (symbol == 0)
9156 {
9157 struct elf_link_hash_table *htab = elf_hash_table (info);
9158
9159 if ((osec->flags & SEC_READONLY) == 0
9160 && htab->data_index_section != NULL)
9161 osec = htab->data_index_section;
9162 else
9163 osec = htab->text_index_section;
9164 symbol = elf_section_data (osec)->dynindx;
9165 }
9166 BFD_ASSERT (symbol != 0);
9167 }
9168 else
9169 /* On SVR4-ish systems, the dynamic loader cannot
9170 relocate the text and data segments independently,
9171 so the symbol does not matter. */
9172 symbol = 0;
9173 if (dynreloc_st_type == STT_GNU_IFUNC)
9174 /* We have an STT_GNU_IFUNC symbol that doesn't resolve
9175 to the .iplt entry. Instead, every non-call reference
9176 must use an R_ARM_IRELATIVE relocation to obtain the
9177 correct run-time address. */
9178 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_IRELATIVE);
9179 else
9180 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
9181 if (globals->use_rel)
9182 relocate = TRUE;
9183 else
9184 outrel.r_addend += dynreloc_value;
9185 }
9186
9187 elf32_arm_add_dynreloc (output_bfd, info, sreloc, &outrel);
9188
9189 /* If this reloc is against an external symbol, we do not want to
9190 fiddle with the addend. Otherwise, we need to include the symbol
9191 value so that it becomes an addend for the dynamic reloc. */
9192 if (! relocate)
9193 return bfd_reloc_ok;
9194
9195 return _bfd_final_link_relocate (howto, input_bfd, input_section,
9196 contents, rel->r_offset,
9197 dynreloc_value, (bfd_vma) 0);
9198 }
9199 else switch (r_type)
9200 {
9201 case R_ARM_ABS12:
9202 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
9203
9204 case R_ARM_XPC25: /* Arm BLX instruction. */
9205 case R_ARM_CALL:
9206 case R_ARM_JUMP24:
9207 case R_ARM_PC24: /* Arm B/BL instruction. */
9208 case R_ARM_PLT32:
9209 {
9210 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
9211
9212 if (r_type == R_ARM_XPC25)
9213 {
9214 /* Check for Arm calling Arm function. */
9215 /* FIXME: Should we translate the instruction into a BL
9216 instruction instead ? */
9217 if (branch_type != ST_BRANCH_TO_THUMB)
9218 (*_bfd_error_handler)
9219 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
9220 input_bfd,
9221 h ? h->root.root.string : "(local)");
9222 }
9223 else if (r_type == R_ARM_PC24)
9224 {
9225 /* Check for Arm calling Thumb function. */
9226 if (branch_type == ST_BRANCH_TO_THUMB)
9227 {
9228 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
9229 output_bfd, input_section,
9230 hit_data, sym_sec, rel->r_offset,
9231 signed_addend, value,
9232 error_message))
9233 return bfd_reloc_ok;
9234 else
9235 return bfd_reloc_dangerous;
9236 }
9237 }
9238
9239 /* Check if a stub has to be inserted because the
9240 destination is too far or we are changing mode. */
9241 if ( r_type == R_ARM_CALL
9242 || r_type == R_ARM_JUMP24
9243 || r_type == R_ARM_PLT32)
9244 {
9245 enum elf32_arm_stub_type stub_type = arm_stub_none;
9246 struct elf32_arm_link_hash_entry *hash;
9247
9248 hash = (struct elf32_arm_link_hash_entry *) h;
9249 stub_type = arm_type_of_stub (info, input_section, rel,
9250 st_type, &branch_type,
9251 hash, value, sym_sec,
9252 input_bfd, sym_name);
9253
9254 if (stub_type != arm_stub_none)
9255 {
9256 /* The target is out of reach, so redirect the
9257 branch to the local stub for this function. */
9258 stub_entry = elf32_arm_get_stub_entry (input_section,
9259 sym_sec, h,
9260 rel, globals,
9261 stub_type);
9262 {
9263 if (stub_entry != NULL)
9264 value = (stub_entry->stub_offset
9265 + stub_entry->stub_sec->output_offset
9266 + stub_entry->stub_sec->output_section->vma);
9267
9268 if (plt_offset != (bfd_vma) -1)
9269 *unresolved_reloc_p = FALSE;
9270 }
9271 }
9272 else
9273 {
9274 /* If the call goes through a PLT entry, make sure to
9275 check distance to the right destination address. */
9276 if (plt_offset != (bfd_vma) -1)
9277 {
9278 value = (splt->output_section->vma
9279 + splt->output_offset
9280 + plt_offset);
9281 *unresolved_reloc_p = FALSE;
9282 /* The PLT entry is in ARM mode, regardless of the
9283 target function. */
9284 branch_type = ST_BRANCH_TO_ARM;
9285 }
9286 }
9287 }
9288
9289 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
9290 where:
9291 S is the address of the symbol in the relocation.
9292 P is address of the instruction being relocated.
9293 A is the addend (extracted from the instruction) in bytes.
9294
9295 S is held in 'value'.
9296 P is the base address of the section containing the
9297 instruction plus the offset of the reloc into that
9298 section, ie:
9299 (input_section->output_section->vma +
9300 input_section->output_offset +
9301 rel->r_offset).
9302 A is the addend, converted into bytes, ie:
9303 (signed_addend * 4)
9304
9305 Note: None of these operations have knowledge of the pipeline
9306 size of the processor, thus it is up to the assembler to
9307 encode this information into the addend. */
9308 value -= (input_section->output_section->vma
9309 + input_section->output_offset);
9310 value -= rel->r_offset;
9311 if (globals->use_rel)
9312 value += (signed_addend << howto->size);
9313 else
9314 /* RELA addends do not have to be adjusted by howto->size. */
9315 value += signed_addend;
9316
9317 signed_addend = value;
9318 signed_addend >>= howto->rightshift;
9319
9320 /* A branch to an undefined weak symbol is turned into a jump to
9321 the next instruction unless a PLT entry will be created.
9322 Do the same for local undefined symbols (but not for STN_UNDEF).
9323 The jump to the next instruction is optimized as a NOP depending
9324 on the architecture. */
9325 if (h ? (h->root.type == bfd_link_hash_undefweak
9326 && plt_offset == (bfd_vma) -1)
9327 : r_symndx != STN_UNDEF && bfd_is_und_section (sym_sec))
9328 {
9329 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000);
9330
9331 if (arch_has_arm_nop (globals))
9332 value |= 0x0320f000;
9333 else
9334 value |= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */
9335 }
9336 else
9337 {
9338 /* Perform a signed range check. */
9339 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
9340 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
9341 return bfd_reloc_overflow;
9342
9343 addend = (value & 2);
9344
9345 value = (signed_addend & howto->dst_mask)
9346 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
9347
9348 if (r_type == R_ARM_CALL)
9349 {
9350 /* Set the H bit in the BLX instruction. */
9351 if (branch_type == ST_BRANCH_TO_THUMB)
9352 {
9353 if (addend)
9354 value |= (1 << 24);
9355 else
9356 value &= ~(bfd_vma)(1 << 24);
9357 }
9358
9359 /* Select the correct instruction (BL or BLX). */
9360 /* Only if we are not handling a BL to a stub. In this
9361 case, mode switching is performed by the stub. */
9362 if (branch_type == ST_BRANCH_TO_THUMB && !stub_entry)
9363 value |= (1 << 28);
9364 else if (stub_entry || branch_type != ST_BRANCH_UNKNOWN)
9365 {
9366 value &= ~(bfd_vma)(1 << 28);
9367 value |= (1 << 24);
9368 }
9369 }
9370 }
9371 }
9372 break;
9373
9374 case R_ARM_ABS32:
9375 value += addend;
9376 if (branch_type == ST_BRANCH_TO_THUMB)
9377 value |= 1;
9378 break;
9379
9380 case R_ARM_ABS32_NOI:
9381 value += addend;
9382 break;
9383
9384 case R_ARM_REL32:
9385 value += addend;
9386 if (branch_type == ST_BRANCH_TO_THUMB)
9387 value |= 1;
9388 value -= (input_section->output_section->vma
9389 + input_section->output_offset + rel->r_offset);
9390 break;
9391
9392 case R_ARM_REL32_NOI:
9393 value += addend;
9394 value -= (input_section->output_section->vma
9395 + input_section->output_offset + rel->r_offset);
9396 break;
9397
9398 case R_ARM_PREL31:
9399 value -= (input_section->output_section->vma
9400 + input_section->output_offset + rel->r_offset);
9401 value += signed_addend;
9402 if (! h || h->root.type != bfd_link_hash_undefweak)
9403 {
9404 /* Check for overflow. */
9405 if ((value ^ (value >> 1)) & (1 << 30))
9406 return bfd_reloc_overflow;
9407 }
9408 value &= 0x7fffffff;
9409 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
9410 if (branch_type == ST_BRANCH_TO_THUMB)
9411 value |= 1;
9412 break;
9413 }
9414
9415 bfd_put_32 (input_bfd, value, hit_data);
9416 return bfd_reloc_ok;
9417
9418 case R_ARM_ABS8:
9419 /* PR 16202: Refectch the addend using the correct size. */
9420 if (globals->use_rel)
9421 addend = bfd_get_8 (input_bfd, hit_data);
9422 value += addend;
9423
9424 /* There is no way to tell whether the user intended to use a signed or
9425 unsigned addend. When checking for overflow we accept either,
9426 as specified by the AAELF. */
9427 if ((long) value > 0xff || (long) value < -0x80)
9428 return bfd_reloc_overflow;
9429
9430 bfd_put_8 (input_bfd, value, hit_data);
9431 return bfd_reloc_ok;
9432
9433 case R_ARM_ABS16:
9434 /* PR 16202: Refectch the addend using the correct size. */
9435 if (globals->use_rel)
9436 addend = bfd_get_16 (input_bfd, hit_data);
9437 value += addend;
9438
9439 /* See comment for R_ARM_ABS8. */
9440 if ((long) value > 0xffff || (long) value < -0x8000)
9441 return bfd_reloc_overflow;
9442
9443 bfd_put_16 (input_bfd, value, hit_data);
9444 return bfd_reloc_ok;
9445
9446 case R_ARM_THM_ABS5:
9447 /* Support ldr and str instructions for the thumb. */
9448 if (globals->use_rel)
9449 {
9450 /* Need to refetch addend. */
9451 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
9452 /* ??? Need to determine shift amount from operand size. */
9453 addend >>= howto->rightshift;
9454 }
9455 value += addend;
9456
9457 /* ??? Isn't value unsigned? */
9458 if ((long) value > 0x1f || (long) value < -0x10)
9459 return bfd_reloc_overflow;
9460
9461 /* ??? Value needs to be properly shifted into place first. */
9462 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
9463 bfd_put_16 (input_bfd, value, hit_data);
9464 return bfd_reloc_ok;
9465
9466 case R_ARM_THM_ALU_PREL_11_0:
9467 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
9468 {
9469 bfd_vma insn;
9470 bfd_signed_vma relocation;
9471
9472 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
9473 | bfd_get_16 (input_bfd, hit_data + 2);
9474
9475 if (globals->use_rel)
9476 {
9477 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
9478 | ((insn & (1 << 26)) >> 15);
9479 if (insn & 0xf00000)
9480 signed_addend = -signed_addend;
9481 }
9482
9483 relocation = value + signed_addend;
9484 relocation -= Pa (input_section->output_section->vma
9485 + input_section->output_offset
9486 + rel->r_offset);
9487
9488 value = relocation;
9489
9490 if (value >= 0x1000)
9491 return bfd_reloc_overflow;
9492
9493 insn = (insn & 0xfb0f8f00) | (value & 0xff)
9494 | ((value & 0x700) << 4)
9495 | ((value & 0x800) << 15);
9496 if (relocation < 0)
9497 insn |= 0xa00000;
9498
9499 bfd_put_16 (input_bfd, insn >> 16, hit_data);
9500 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
9501
9502 return bfd_reloc_ok;
9503 }
9504
9505 case R_ARM_THM_PC8:
9506 /* PR 10073: This reloc is not generated by the GNU toolchain,
9507 but it is supported for compatibility with third party libraries
9508 generated by other compilers, specifically the ARM/IAR. */
9509 {
9510 bfd_vma insn;
9511 bfd_signed_vma relocation;
9512
9513 insn = bfd_get_16 (input_bfd, hit_data);
9514
9515 if (globals->use_rel)
9516 addend = ((((insn & 0x00ff) << 2) + 4) & 0x3ff) -4;
9517
9518 relocation = value + addend;
9519 relocation -= Pa (input_section->output_section->vma
9520 + input_section->output_offset
9521 + rel->r_offset);
9522
9523 value = relocation;
9524
9525 /* We do not check for overflow of this reloc. Although strictly
9526 speaking this is incorrect, it appears to be necessary in order
9527 to work with IAR generated relocs. Since GCC and GAS do not
9528 generate R_ARM_THM_PC8 relocs, the lack of a check should not be
9529 a problem for them. */
9530 value &= 0x3fc;
9531
9532 insn = (insn & 0xff00) | (value >> 2);
9533
9534 bfd_put_16 (input_bfd, insn, hit_data);
9535
9536 return bfd_reloc_ok;
9537 }
9538
9539 case R_ARM_THM_PC12:
9540 /* Corresponds to: ldr.w reg, [pc, #offset]. */
9541 {
9542 bfd_vma insn;
9543 bfd_signed_vma relocation;
9544
9545 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
9546 | bfd_get_16 (input_bfd, hit_data + 2);
9547
9548 if (globals->use_rel)
9549 {
9550 signed_addend = insn & 0xfff;
9551 if (!(insn & (1 << 23)))
9552 signed_addend = -signed_addend;
9553 }
9554
9555 relocation = value + signed_addend;
9556 relocation -= Pa (input_section->output_section->vma
9557 + input_section->output_offset
9558 + rel->r_offset);
9559
9560 value = relocation;
9561
9562 if (value >= 0x1000)
9563 return bfd_reloc_overflow;
9564
9565 insn = (insn & 0xff7ff000) | value;
9566 if (relocation >= 0)
9567 insn |= (1 << 23);
9568
9569 bfd_put_16 (input_bfd, insn >> 16, hit_data);
9570 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
9571
9572 return bfd_reloc_ok;
9573 }
9574
9575 case R_ARM_THM_XPC22:
9576 case R_ARM_THM_CALL:
9577 case R_ARM_THM_JUMP24:
9578 /* Thumb BL (branch long instruction). */
9579 {
9580 bfd_vma relocation;
9581 bfd_vma reloc_sign;
9582 bfd_boolean overflow = FALSE;
9583 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
9584 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
9585 bfd_signed_vma reloc_signed_max;
9586 bfd_signed_vma reloc_signed_min;
9587 bfd_vma check;
9588 bfd_signed_vma signed_check;
9589 int bitsize;
9590 const int thumb2 = using_thumb2 (globals);
9591
9592 /* A branch to an undefined weak symbol is turned into a jump to
9593 the next instruction unless a PLT entry will be created.
9594 The jump to the next instruction is optimized as a NOP.W for
9595 Thumb-2 enabled architectures. */
9596 if (h && h->root.type == bfd_link_hash_undefweak
9597 && plt_offset == (bfd_vma) -1)
9598 {
9599 if (arch_has_thumb2_nop (globals))
9600 {
9601 bfd_put_16 (input_bfd, 0xf3af, hit_data);
9602 bfd_put_16 (input_bfd, 0x8000, hit_data + 2);
9603 }
9604 else
9605 {
9606 bfd_put_16 (input_bfd, 0xe000, hit_data);
9607 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
9608 }
9609 return bfd_reloc_ok;
9610 }
9611
9612 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
9613 with Thumb-1) involving the J1 and J2 bits. */
9614 if (globals->use_rel)
9615 {
9616 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
9617 bfd_vma upper = upper_insn & 0x3ff;
9618 bfd_vma lower = lower_insn & 0x7ff;
9619 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
9620 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
9621 bfd_vma i1 = j1 ^ s ? 0 : 1;
9622 bfd_vma i2 = j2 ^ s ? 0 : 1;
9623
9624 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
9625 /* Sign extend. */
9626 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
9627
9628 signed_addend = addend;
9629 }
9630
9631 if (r_type == R_ARM_THM_XPC22)
9632 {
9633 /* Check for Thumb to Thumb call. */
9634 /* FIXME: Should we translate the instruction into a BL
9635 instruction instead ? */
9636 if (branch_type == ST_BRANCH_TO_THUMB)
9637 (*_bfd_error_handler)
9638 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
9639 input_bfd,
9640 h ? h->root.root.string : "(local)");
9641 }
9642 else
9643 {
9644 /* If it is not a call to Thumb, assume call to Arm.
9645 If it is a call relative to a section name, then it is not a
9646 function call at all, but rather a long jump. Calls through
9647 the PLT do not require stubs. */
9648 if (branch_type == ST_BRANCH_TO_ARM && plt_offset == (bfd_vma) -1)
9649 {
9650 if (globals->use_blx && r_type == R_ARM_THM_CALL)
9651 {
9652 /* Convert BL to BLX. */
9653 lower_insn = (lower_insn & ~0x1000) | 0x0800;
9654 }
9655 else if (( r_type != R_ARM_THM_CALL)
9656 && (r_type != R_ARM_THM_JUMP24))
9657 {
9658 if (elf32_thumb_to_arm_stub
9659 (info, sym_name, input_bfd, output_bfd, input_section,
9660 hit_data, sym_sec, rel->r_offset, signed_addend, value,
9661 error_message))
9662 return bfd_reloc_ok;
9663 else
9664 return bfd_reloc_dangerous;
9665 }
9666 }
9667 else if (branch_type == ST_BRANCH_TO_THUMB
9668 && globals->use_blx
9669 && r_type == R_ARM_THM_CALL)
9670 {
9671 /* Make sure this is a BL. */
9672 lower_insn |= 0x1800;
9673 }
9674 }
9675
9676 enum elf32_arm_stub_type stub_type = arm_stub_none;
9677 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24)
9678 {
9679 /* Check if a stub has to be inserted because the destination
9680 is too far. */
9681 struct elf32_arm_stub_hash_entry *stub_entry;
9682 struct elf32_arm_link_hash_entry *hash;
9683
9684 hash = (struct elf32_arm_link_hash_entry *) h;
9685
9686 stub_type = arm_type_of_stub (info, input_section, rel,
9687 st_type, &branch_type,
9688 hash, value, sym_sec,
9689 input_bfd, sym_name);
9690
9691 if (stub_type != arm_stub_none)
9692 {
9693 /* The target is out of reach or we are changing modes, so
9694 redirect the branch to the local stub for this
9695 function. */
9696 stub_entry = elf32_arm_get_stub_entry (input_section,
9697 sym_sec, h,
9698 rel, globals,
9699 stub_type);
9700 if (stub_entry != NULL)
9701 {
9702 value = (stub_entry->stub_offset
9703 + stub_entry->stub_sec->output_offset
9704 + stub_entry->stub_sec->output_section->vma);
9705
9706 if (plt_offset != (bfd_vma) -1)
9707 *unresolved_reloc_p = FALSE;
9708 }
9709
9710 /* If this call becomes a call to Arm, force BLX. */
9711 if (globals->use_blx && (r_type == R_ARM_THM_CALL))
9712 {
9713 if ((stub_entry
9714 && !arm_stub_is_thumb (stub_entry->stub_type))
9715 || branch_type != ST_BRANCH_TO_THUMB)
9716 lower_insn = (lower_insn & ~0x1000) | 0x0800;
9717 }
9718 }
9719 }
9720
9721 /* Handle calls via the PLT. */
9722 if (stub_type == arm_stub_none && plt_offset != (bfd_vma) -1)
9723 {
9724 value = (splt->output_section->vma
9725 + splt->output_offset
9726 + plt_offset);
9727
9728 if (globals->use_blx
9729 && r_type == R_ARM_THM_CALL
9730 && ! using_thumb_only (globals))
9731 {
9732 /* If the Thumb BLX instruction is available, convert
9733 the BL to a BLX instruction to call the ARM-mode
9734 PLT entry. */
9735 lower_insn = (lower_insn & ~0x1000) | 0x0800;
9736 branch_type = ST_BRANCH_TO_ARM;
9737 }
9738 else
9739 {
9740 if (! using_thumb_only (globals))
9741 /* Target the Thumb stub before the ARM PLT entry. */
9742 value -= PLT_THUMB_STUB_SIZE;
9743 branch_type = ST_BRANCH_TO_THUMB;
9744 }
9745 *unresolved_reloc_p = FALSE;
9746 }
9747
9748 relocation = value + signed_addend;
9749
9750 relocation -= (input_section->output_section->vma
9751 + input_section->output_offset
9752 + rel->r_offset);
9753
9754 check = relocation >> howto->rightshift;
9755
9756 /* If this is a signed value, the rightshift just dropped
9757 leading 1 bits (assuming twos complement). */
9758 if ((bfd_signed_vma) relocation >= 0)
9759 signed_check = check;
9760 else
9761 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
9762
9763 /* Calculate the permissable maximum and minimum values for
9764 this relocation according to whether we're relocating for
9765 Thumb-2 or not. */
9766 bitsize = howto->bitsize;
9767 if (!thumb2)
9768 bitsize -= 2;
9769 reloc_signed_max = (1 << (bitsize - 1)) - 1;
9770 reloc_signed_min = ~reloc_signed_max;
9771
9772 /* Assumes two's complement. */
9773 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
9774 overflow = TRUE;
9775
9776 if ((lower_insn & 0x5000) == 0x4000)
9777 /* For a BLX instruction, make sure that the relocation is rounded up
9778 to a word boundary. This follows the semantics of the instruction
9779 which specifies that bit 1 of the target address will come from bit
9780 1 of the base address. */
9781 relocation = (relocation + 2) & ~ 3;
9782
9783 /* Put RELOCATION back into the insn. Assumes two's complement.
9784 We use the Thumb-2 encoding, which is safe even if dealing with
9785 a Thumb-1 instruction by virtue of our overflow check above. */
9786 reloc_sign = (signed_check < 0) ? 1 : 0;
9787 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
9788 | ((relocation >> 12) & 0x3ff)
9789 | (reloc_sign << 10);
9790 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
9791 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
9792 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
9793 | ((relocation >> 1) & 0x7ff);
9794
9795 /* Put the relocated value back in the object file: */
9796 bfd_put_16 (input_bfd, upper_insn, hit_data);
9797 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
9798
9799 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
9800 }
9801 break;
9802
9803 case R_ARM_THM_JUMP19:
9804 /* Thumb32 conditional branch instruction. */
9805 {
9806 bfd_vma relocation;
9807 bfd_boolean overflow = FALSE;
9808 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
9809 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
9810 bfd_signed_vma reloc_signed_max = 0xffffe;
9811 bfd_signed_vma reloc_signed_min = -0x100000;
9812 bfd_signed_vma signed_check;
9813 enum elf32_arm_stub_type stub_type = arm_stub_none;
9814 struct elf32_arm_stub_hash_entry *stub_entry;
9815 struct elf32_arm_link_hash_entry *hash;
9816
9817 /* Need to refetch the addend, reconstruct the top three bits,
9818 and squish the two 11 bit pieces together. */
9819 if (globals->use_rel)
9820 {
9821 bfd_vma S = (upper_insn & 0x0400) >> 10;
9822 bfd_vma upper = (upper_insn & 0x003f);
9823 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
9824 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
9825 bfd_vma lower = (lower_insn & 0x07ff);
9826
9827 upper |= J1 << 6;
9828 upper |= J2 << 7;
9829 upper |= (!S) << 8;
9830 upper -= 0x0100; /* Sign extend. */
9831
9832 addend = (upper << 12) | (lower << 1);
9833 signed_addend = addend;
9834 }
9835
9836 /* Handle calls via the PLT. */
9837 if (plt_offset != (bfd_vma) -1)
9838 {
9839 value = (splt->output_section->vma
9840 + splt->output_offset
9841 + plt_offset);
9842 /* Target the Thumb stub before the ARM PLT entry. */
9843 value -= PLT_THUMB_STUB_SIZE;
9844 *unresolved_reloc_p = FALSE;
9845 }
9846
9847 hash = (struct elf32_arm_link_hash_entry *)h;
9848
9849 stub_type = arm_type_of_stub (info, input_section, rel,
9850 st_type, &branch_type,
9851 hash, value, sym_sec,
9852 input_bfd, sym_name);
9853 if (stub_type != arm_stub_none)
9854 {
9855 stub_entry = elf32_arm_get_stub_entry (input_section,
9856 sym_sec, h,
9857 rel, globals,
9858 stub_type);
9859 if (stub_entry != NULL)
9860 {
9861 value = (stub_entry->stub_offset
9862 + stub_entry->stub_sec->output_offset
9863 + stub_entry->stub_sec->output_section->vma);
9864 }
9865 }
9866
9867 relocation = value + signed_addend;
9868 relocation -= (input_section->output_section->vma
9869 + input_section->output_offset
9870 + rel->r_offset);
9871 signed_check = (bfd_signed_vma) relocation;
9872
9873 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
9874 overflow = TRUE;
9875
9876 /* Put RELOCATION back into the insn. */
9877 {
9878 bfd_vma S = (relocation & 0x00100000) >> 20;
9879 bfd_vma J2 = (relocation & 0x00080000) >> 19;
9880 bfd_vma J1 = (relocation & 0x00040000) >> 18;
9881 bfd_vma hi = (relocation & 0x0003f000) >> 12;
9882 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
9883
9884 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
9885 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
9886 }
9887
9888 /* Put the relocated value back in the object file: */
9889 bfd_put_16 (input_bfd, upper_insn, hit_data);
9890 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
9891
9892 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
9893 }
9894
9895 case R_ARM_THM_JUMP11:
9896 case R_ARM_THM_JUMP8:
9897 case R_ARM_THM_JUMP6:
9898 /* Thumb B (branch) instruction). */
9899 {
9900 bfd_signed_vma relocation;
9901 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
9902 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
9903 bfd_signed_vma signed_check;
9904
9905 /* CZB cannot jump backward. */
9906 if (r_type == R_ARM_THM_JUMP6)
9907 reloc_signed_min = 0;
9908
9909 if (globals->use_rel)
9910 {
9911 /* Need to refetch addend. */
9912 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
9913 if (addend & ((howto->src_mask + 1) >> 1))
9914 {
9915 signed_addend = -1;
9916 signed_addend &= ~ howto->src_mask;
9917 signed_addend |= addend;
9918 }
9919 else
9920 signed_addend = addend;
9921 /* The value in the insn has been right shifted. We need to
9922 undo this, so that we can perform the address calculation
9923 in terms of bytes. */
9924 signed_addend <<= howto->rightshift;
9925 }
9926 relocation = value + signed_addend;
9927
9928 relocation -= (input_section->output_section->vma
9929 + input_section->output_offset
9930 + rel->r_offset);
9931
9932 relocation >>= howto->rightshift;
9933 signed_check = relocation;
9934
9935 if (r_type == R_ARM_THM_JUMP6)
9936 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
9937 else
9938 relocation &= howto->dst_mask;
9939 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
9940
9941 bfd_put_16 (input_bfd, relocation, hit_data);
9942
9943 /* Assumes two's complement. */
9944 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
9945 return bfd_reloc_overflow;
9946
9947 return bfd_reloc_ok;
9948 }
9949
9950 case R_ARM_ALU_PCREL7_0:
9951 case R_ARM_ALU_PCREL15_8:
9952 case R_ARM_ALU_PCREL23_15:
9953 {
9954 bfd_vma insn;
9955 bfd_vma relocation;
9956
9957 insn = bfd_get_32 (input_bfd, hit_data);
9958 if (globals->use_rel)
9959 {
9960 /* Extract the addend. */
9961 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
9962 signed_addend = addend;
9963 }
9964 relocation = value + signed_addend;
9965
9966 relocation -= (input_section->output_section->vma
9967 + input_section->output_offset
9968 + rel->r_offset);
9969 insn = (insn & ~0xfff)
9970 | ((howto->bitpos << 7) & 0xf00)
9971 | ((relocation >> howto->bitpos) & 0xff);
9972 bfd_put_32 (input_bfd, value, hit_data);
9973 }
9974 return bfd_reloc_ok;
9975
9976 case R_ARM_GNU_VTINHERIT:
9977 case R_ARM_GNU_VTENTRY:
9978 return bfd_reloc_ok;
9979
9980 case R_ARM_GOTOFF32:
9981 /* Relocation is relative to the start of the
9982 global offset table. */
9983
9984 BFD_ASSERT (sgot != NULL);
9985 if (sgot == NULL)
9986 return bfd_reloc_notsupported;
9987
9988 /* If we are addressing a Thumb function, we need to adjust the
9989 address by one, so that attempts to call the function pointer will
9990 correctly interpret it as Thumb code. */
9991 if (branch_type == ST_BRANCH_TO_THUMB)
9992 value += 1;
9993
9994 /* Note that sgot->output_offset is not involved in this
9995 calculation. We always want the start of .got. If we
9996 define _GLOBAL_OFFSET_TABLE in a different way, as is
9997 permitted by the ABI, we might have to change this
9998 calculation. */
9999 value -= sgot->output_section->vma;
10000 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10001 contents, rel->r_offset, value,
10002 rel->r_addend);
10003
10004 case R_ARM_GOTPC:
10005 /* Use global offset table as symbol value. */
10006 BFD_ASSERT (sgot != NULL);
10007
10008 if (sgot == NULL)
10009 return bfd_reloc_notsupported;
10010
10011 *unresolved_reloc_p = FALSE;
10012 value = sgot->output_section->vma;
10013 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10014 contents, rel->r_offset, value,
10015 rel->r_addend);
10016
10017 case R_ARM_GOT32:
10018 case R_ARM_GOT_PREL:
10019 /* Relocation is to the entry for this symbol in the
10020 global offset table. */
10021 if (sgot == NULL)
10022 return bfd_reloc_notsupported;
10023
10024 if (dynreloc_st_type == STT_GNU_IFUNC
10025 && plt_offset != (bfd_vma) -1
10026 && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h)))
10027 {
10028 /* We have a relocation against a locally-binding STT_GNU_IFUNC
10029 symbol, and the relocation resolves directly to the runtime
10030 target rather than to the .iplt entry. This means that any
10031 .got entry would be the same value as the .igot.plt entry,
10032 so there's no point creating both. */
10033 sgot = globals->root.igotplt;
10034 value = sgot->output_offset + gotplt_offset;
10035 }
10036 else if (h != NULL)
10037 {
10038 bfd_vma off;
10039
10040 off = h->got.offset;
10041 BFD_ASSERT (off != (bfd_vma) -1);
10042 if ((off & 1) != 0)
10043 {
10044 /* We have already processsed one GOT relocation against
10045 this symbol. */
10046 off &= ~1;
10047 if (globals->root.dynamic_sections_created
10048 && !SYMBOL_REFERENCES_LOCAL (info, h))
10049 *unresolved_reloc_p = FALSE;
10050 }
10051 else
10052 {
10053 Elf_Internal_Rela outrel;
10054
10055 if (h->dynindx != -1 && !SYMBOL_REFERENCES_LOCAL (info, h))
10056 {
10057 /* If the symbol doesn't resolve locally in a static
10058 object, we have an undefined reference. If the
10059 symbol doesn't resolve locally in a dynamic object,
10060 it should be resolved by the dynamic linker. */
10061 if (globals->root.dynamic_sections_created)
10062 {
10063 outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10064 *unresolved_reloc_p = FALSE;
10065 }
10066 else
10067 outrel.r_info = 0;
10068 outrel.r_addend = 0;
10069 }
10070 else
10071 {
10072 if (dynreloc_st_type == STT_GNU_IFUNC)
10073 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
10074 else if (bfd_link_pic (info) &&
10075 (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10076 || h->root.type != bfd_link_hash_undefweak))
10077 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
10078 else
10079 outrel.r_info = 0;
10080 outrel.r_addend = dynreloc_value;
10081 }
10082
10083 /* The GOT entry is initialized to zero by default.
10084 See if we should install a different value. */
10085 if (outrel.r_addend != 0
10086 && (outrel.r_info == 0 || globals->use_rel))
10087 {
10088 bfd_put_32 (output_bfd, outrel.r_addend,
10089 sgot->contents + off);
10090 outrel.r_addend = 0;
10091 }
10092
10093 if (outrel.r_info != 0)
10094 {
10095 outrel.r_offset = (sgot->output_section->vma
10096 + sgot->output_offset
10097 + off);
10098 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10099 }
10100 h->got.offset |= 1;
10101 }
10102 value = sgot->output_offset + off;
10103 }
10104 else
10105 {
10106 bfd_vma off;
10107
10108 BFD_ASSERT (local_got_offsets != NULL &&
10109 local_got_offsets[r_symndx] != (bfd_vma) -1);
10110
10111 off = local_got_offsets[r_symndx];
10112
10113 /* The offset must always be a multiple of 4. We use the
10114 least significant bit to record whether we have already
10115 generated the necessary reloc. */
10116 if ((off & 1) != 0)
10117 off &= ~1;
10118 else
10119 {
10120 if (globals->use_rel)
10121 bfd_put_32 (output_bfd, dynreloc_value, sgot->contents + off);
10122
10123 if (bfd_link_pic (info) || dynreloc_st_type == STT_GNU_IFUNC)
10124 {
10125 Elf_Internal_Rela outrel;
10126
10127 outrel.r_addend = addend + dynreloc_value;
10128 outrel.r_offset = (sgot->output_section->vma
10129 + sgot->output_offset
10130 + off);
10131 if (dynreloc_st_type == STT_GNU_IFUNC)
10132 outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE);
10133 else
10134 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
10135 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10136 }
10137
10138 local_got_offsets[r_symndx] |= 1;
10139 }
10140
10141 value = sgot->output_offset + off;
10142 }
10143 if (r_type != R_ARM_GOT32)
10144 value += sgot->output_section->vma;
10145
10146 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10147 contents, rel->r_offset, value,
10148 rel->r_addend);
10149
10150 case R_ARM_TLS_LDO32:
10151 value = value - dtpoff_base (info);
10152
10153 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10154 contents, rel->r_offset, value,
10155 rel->r_addend);
10156
10157 case R_ARM_TLS_LDM32:
10158 {
10159 bfd_vma off;
10160
10161 if (sgot == NULL)
10162 abort ();
10163
10164 off = globals->tls_ldm_got.offset;
10165
10166 if ((off & 1) != 0)
10167 off &= ~1;
10168 else
10169 {
10170 /* If we don't know the module number, create a relocation
10171 for it. */
10172 if (bfd_link_pic (info))
10173 {
10174 Elf_Internal_Rela outrel;
10175
10176 if (srelgot == NULL)
10177 abort ();
10178
10179 outrel.r_addend = 0;
10180 outrel.r_offset = (sgot->output_section->vma
10181 + sgot->output_offset + off);
10182 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
10183
10184 if (globals->use_rel)
10185 bfd_put_32 (output_bfd, outrel.r_addend,
10186 sgot->contents + off);
10187
10188 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10189 }
10190 else
10191 bfd_put_32 (output_bfd, 1, sgot->contents + off);
10192
10193 globals->tls_ldm_got.offset |= 1;
10194 }
10195
10196 value = sgot->output_section->vma + sgot->output_offset + off
10197 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
10198
10199 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10200 contents, rel->r_offset, value,
10201 rel->r_addend);
10202 }
10203
10204 case R_ARM_TLS_CALL:
10205 case R_ARM_THM_TLS_CALL:
10206 case R_ARM_TLS_GD32:
10207 case R_ARM_TLS_IE32:
10208 case R_ARM_TLS_GOTDESC:
10209 case R_ARM_TLS_DESCSEQ:
10210 case R_ARM_THM_TLS_DESCSEQ:
10211 {
10212 bfd_vma off, offplt;
10213 int indx = 0;
10214 char tls_type;
10215
10216 BFD_ASSERT (sgot != NULL);
10217
10218 if (h != NULL)
10219 {
10220 bfd_boolean dyn;
10221 dyn = globals->root.dynamic_sections_created;
10222 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
10223 bfd_link_pic (info),
10224 h)
10225 && (!bfd_link_pic (info)
10226 || !SYMBOL_REFERENCES_LOCAL (info, h)))
10227 {
10228 *unresolved_reloc_p = FALSE;
10229 indx = h->dynindx;
10230 }
10231 off = h->got.offset;
10232 offplt = elf32_arm_hash_entry (h)->tlsdesc_got;
10233 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
10234 }
10235 else
10236 {
10237 BFD_ASSERT (local_got_offsets != NULL);
10238 off = local_got_offsets[r_symndx];
10239 offplt = local_tlsdesc_gotents[r_symndx];
10240 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
10241 }
10242
10243 /* Linker relaxations happens from one of the
10244 R_ARM_{GOTDESC,CALL,DESCSEQ} relocations to IE or LE. */
10245 if (ELF32_R_TYPE(rel->r_info) != r_type)
10246 tls_type = GOT_TLS_IE;
10247
10248 BFD_ASSERT (tls_type != GOT_UNKNOWN);
10249
10250 if ((off & 1) != 0)
10251 off &= ~1;
10252 else
10253 {
10254 bfd_boolean need_relocs = FALSE;
10255 Elf_Internal_Rela outrel;
10256 int cur_off = off;
10257
10258 /* The GOT entries have not been initialized yet. Do it
10259 now, and emit any relocations. If both an IE GOT and a
10260 GD GOT are necessary, we emit the GD first. */
10261
10262 if ((bfd_link_pic (info) || indx != 0)
10263 && (h == NULL
10264 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10265 || h->root.type != bfd_link_hash_undefweak))
10266 {
10267 need_relocs = TRUE;
10268 BFD_ASSERT (srelgot != NULL);
10269 }
10270
10271 if (tls_type & GOT_TLS_GDESC)
10272 {
10273 bfd_byte *loc;
10274
10275 /* We should have relaxed, unless this is an undefined
10276 weak symbol. */
10277 BFD_ASSERT ((h && (h->root.type == bfd_link_hash_undefweak))
10278 || bfd_link_pic (info));
10279 BFD_ASSERT (globals->sgotplt_jump_table_size + offplt + 8
10280 <= globals->root.sgotplt->size);
10281
10282 outrel.r_addend = 0;
10283 outrel.r_offset = (globals->root.sgotplt->output_section->vma
10284 + globals->root.sgotplt->output_offset
10285 + offplt
10286 + globals->sgotplt_jump_table_size);
10287
10288 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DESC);
10289 sreloc = globals->root.srelplt;
10290 loc = sreloc->contents;
10291 loc += globals->next_tls_desc_index++ * RELOC_SIZE (globals);
10292 BFD_ASSERT (loc + RELOC_SIZE (globals)
10293 <= sreloc->contents + sreloc->size);
10294
10295 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
10296
10297 /* For globals, the first word in the relocation gets
10298 the relocation index and the top bit set, or zero,
10299 if we're binding now. For locals, it gets the
10300 symbol's offset in the tls section. */
10301 bfd_put_32 (output_bfd,
10302 !h ? value - elf_hash_table (info)->tls_sec->vma
10303 : info->flags & DF_BIND_NOW ? 0
10304 : 0x80000000 | ELF32_R_SYM (outrel.r_info),
10305 globals->root.sgotplt->contents + offplt
10306 + globals->sgotplt_jump_table_size);
10307
10308 /* Second word in the relocation is always zero. */
10309 bfd_put_32 (output_bfd, 0,
10310 globals->root.sgotplt->contents + offplt
10311 + globals->sgotplt_jump_table_size + 4);
10312 }
10313 if (tls_type & GOT_TLS_GD)
10314 {
10315 if (need_relocs)
10316 {
10317 outrel.r_addend = 0;
10318 outrel.r_offset = (sgot->output_section->vma
10319 + sgot->output_offset
10320 + cur_off);
10321 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
10322
10323 if (globals->use_rel)
10324 bfd_put_32 (output_bfd, outrel.r_addend,
10325 sgot->contents + cur_off);
10326
10327 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10328
10329 if (indx == 0)
10330 bfd_put_32 (output_bfd, value - dtpoff_base (info),
10331 sgot->contents + cur_off + 4);
10332 else
10333 {
10334 outrel.r_addend = 0;
10335 outrel.r_info = ELF32_R_INFO (indx,
10336 R_ARM_TLS_DTPOFF32);
10337 outrel.r_offset += 4;
10338
10339 if (globals->use_rel)
10340 bfd_put_32 (output_bfd, outrel.r_addend,
10341 sgot->contents + cur_off + 4);
10342
10343 elf32_arm_add_dynreloc (output_bfd, info,
10344 srelgot, &outrel);
10345 }
10346 }
10347 else
10348 {
10349 /* If we are not emitting relocations for a
10350 general dynamic reference, then we must be in a
10351 static link or an executable link with the
10352 symbol binding locally. Mark it as belonging
10353 to module 1, the executable. */
10354 bfd_put_32 (output_bfd, 1,
10355 sgot->contents + cur_off);
10356 bfd_put_32 (output_bfd, value - dtpoff_base (info),
10357 sgot->contents + cur_off + 4);
10358 }
10359
10360 cur_off += 8;
10361 }
10362
10363 if (tls_type & GOT_TLS_IE)
10364 {
10365 if (need_relocs)
10366 {
10367 if (indx == 0)
10368 outrel.r_addend = value - dtpoff_base (info);
10369 else
10370 outrel.r_addend = 0;
10371 outrel.r_offset = (sgot->output_section->vma
10372 + sgot->output_offset
10373 + cur_off);
10374 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
10375
10376 if (globals->use_rel)
10377 bfd_put_32 (output_bfd, outrel.r_addend,
10378 sgot->contents + cur_off);
10379
10380 elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel);
10381 }
10382 else
10383 bfd_put_32 (output_bfd, tpoff (info, value),
10384 sgot->contents + cur_off);
10385 cur_off += 4;
10386 }
10387
10388 if (h != NULL)
10389 h->got.offset |= 1;
10390 else
10391 local_got_offsets[r_symndx] |= 1;
10392 }
10393
10394 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
10395 off += 8;
10396 else if (tls_type & GOT_TLS_GDESC)
10397 off = offplt;
10398
10399 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL
10400 || ELF32_R_TYPE(rel->r_info) == R_ARM_THM_TLS_CALL)
10401 {
10402 bfd_signed_vma offset;
10403 /* TLS stubs are arm mode. The original symbol is a
10404 data object, so branch_type is bogus. */
10405 branch_type = ST_BRANCH_TO_ARM;
10406 enum elf32_arm_stub_type stub_type
10407 = arm_type_of_stub (info, input_section, rel,
10408 st_type, &branch_type,
10409 (struct elf32_arm_link_hash_entry *)h,
10410 globals->tls_trampoline, globals->root.splt,
10411 input_bfd, sym_name);
10412
10413 if (stub_type != arm_stub_none)
10414 {
10415 struct elf32_arm_stub_hash_entry *stub_entry
10416 = elf32_arm_get_stub_entry
10417 (input_section, globals->root.splt, 0, rel,
10418 globals, stub_type);
10419 offset = (stub_entry->stub_offset
10420 + stub_entry->stub_sec->output_offset
10421 + stub_entry->stub_sec->output_section->vma);
10422 }
10423 else
10424 offset = (globals->root.splt->output_section->vma
10425 + globals->root.splt->output_offset
10426 + globals->tls_trampoline);
10427
10428 if (ELF32_R_TYPE(rel->r_info) == R_ARM_TLS_CALL)
10429 {
10430 unsigned long inst;
10431
10432 offset -= (input_section->output_section->vma
10433 + input_section->output_offset
10434 + rel->r_offset + 8);
10435
10436 inst = offset >> 2;
10437 inst &= 0x00ffffff;
10438 value = inst | (globals->use_blx ? 0xfa000000 : 0xeb000000);
10439 }
10440 else
10441 {
10442 /* Thumb blx encodes the offset in a complicated
10443 fashion. */
10444 unsigned upper_insn, lower_insn;
10445 unsigned neg;
10446
10447 offset -= (input_section->output_section->vma
10448 + input_section->output_offset
10449 + rel->r_offset + 4);
10450
10451 if (stub_type != arm_stub_none
10452 && arm_stub_is_thumb (stub_type))
10453 {
10454 lower_insn = 0xd000;
10455 }
10456 else
10457 {
10458 lower_insn = 0xc000;
10459 /* Round up the offset to a word boundary. */
10460 offset = (offset + 2) & ~2;
10461 }
10462
10463 neg = offset < 0;
10464 upper_insn = (0xf000
10465 | ((offset >> 12) & 0x3ff)
10466 | (neg << 10));
10467 lower_insn |= (((!((offset >> 23) & 1)) ^ neg) << 13)
10468 | (((!((offset >> 22) & 1)) ^ neg) << 11)
10469 | ((offset >> 1) & 0x7ff);
10470 bfd_put_16 (input_bfd, upper_insn, hit_data);
10471 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
10472 return bfd_reloc_ok;
10473 }
10474 }
10475 /* These relocations needs special care, as besides the fact
10476 they point somewhere in .gotplt, the addend must be
10477 adjusted accordingly depending on the type of instruction
10478 we refer to. */
10479 else if ((r_type == R_ARM_TLS_GOTDESC) && (tls_type & GOT_TLS_GDESC))
10480 {
10481 unsigned long data, insn;
10482 unsigned thumb;
10483
10484 data = bfd_get_32 (input_bfd, hit_data);
10485 thumb = data & 1;
10486 data &= ~1u;
10487
10488 if (thumb)
10489 {
10490 insn = bfd_get_16 (input_bfd, contents + rel->r_offset - data);
10491 if ((insn & 0xf000) == 0xf000 || (insn & 0xf800) == 0xe800)
10492 insn = (insn << 16)
10493 | bfd_get_16 (input_bfd,
10494 contents + rel->r_offset - data + 2);
10495 if ((insn & 0xf800c000) == 0xf000c000)
10496 /* bl/blx */
10497 value = -6;
10498 else if ((insn & 0xffffff00) == 0x4400)
10499 /* add */
10500 value = -5;
10501 else
10502 {
10503 (*_bfd_error_handler)
10504 (_("%B(%A+0x%lx):unexpected Thumb instruction '0x%x' referenced by TLS_GOTDESC"),
10505 input_bfd, input_section,
10506 (unsigned long)rel->r_offset, insn);
10507 return bfd_reloc_notsupported;
10508 }
10509 }
10510 else
10511 {
10512 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - data);
10513
10514 switch (insn >> 24)
10515 {
10516 case 0xeb: /* bl */
10517 case 0xfa: /* blx */
10518 value = -4;
10519 break;
10520
10521 case 0xe0: /* add */
10522 value = -8;
10523 break;
10524
10525 default:
10526 (*_bfd_error_handler)
10527 (_("%B(%A+0x%lx):unexpected ARM instruction '0x%x' referenced by TLS_GOTDESC"),
10528 input_bfd, input_section,
10529 (unsigned long)rel->r_offset, insn);
10530 return bfd_reloc_notsupported;
10531 }
10532 }
10533
10534 value += ((globals->root.sgotplt->output_section->vma
10535 + globals->root.sgotplt->output_offset + off)
10536 - (input_section->output_section->vma
10537 + input_section->output_offset
10538 + rel->r_offset)
10539 + globals->sgotplt_jump_table_size);
10540 }
10541 else
10542 value = ((globals->root.sgot->output_section->vma
10543 + globals->root.sgot->output_offset + off)
10544 - (input_section->output_section->vma
10545 + input_section->output_offset + rel->r_offset));
10546
10547 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10548 contents, rel->r_offset, value,
10549 rel->r_addend);
10550 }
10551
10552 case R_ARM_TLS_LE32:
10553 if (bfd_link_dll (info))
10554 {
10555 (*_bfd_error_handler)
10556 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
10557 input_bfd, input_section,
10558 (long) rel->r_offset, howto->name);
10559 return bfd_reloc_notsupported;
10560 }
10561 else
10562 value = tpoff (info, value);
10563
10564 return _bfd_final_link_relocate (howto, input_bfd, input_section,
10565 contents, rel->r_offset, value,
10566 rel->r_addend);
10567
10568 case R_ARM_V4BX:
10569 if (globals->fix_v4bx)
10570 {
10571 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10572
10573 /* Ensure that we have a BX instruction. */
10574 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
10575
10576 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
10577 {
10578 /* Branch to veneer. */
10579 bfd_vma glue_addr;
10580 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
10581 glue_addr -= input_section->output_section->vma
10582 + input_section->output_offset
10583 + rel->r_offset + 8;
10584 insn = (insn & 0xf0000000) | 0x0a000000
10585 | ((glue_addr >> 2) & 0x00ffffff);
10586 }
10587 else
10588 {
10589 /* Preserve Rm (lowest four bits) and the condition code
10590 (highest four bits). Other bits encode MOV PC,Rm. */
10591 insn = (insn & 0xf000000f) | 0x01a0f000;
10592 }
10593
10594 bfd_put_32 (input_bfd, insn, hit_data);
10595 }
10596 return bfd_reloc_ok;
10597
10598 case R_ARM_MOVW_ABS_NC:
10599 case R_ARM_MOVT_ABS:
10600 case R_ARM_MOVW_PREL_NC:
10601 case R_ARM_MOVT_PREL:
10602 /* Until we properly support segment-base-relative addressing then
10603 we assume the segment base to be zero, as for the group relocations.
10604 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
10605 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
10606 case R_ARM_MOVW_BREL_NC:
10607 case R_ARM_MOVW_BREL:
10608 case R_ARM_MOVT_BREL:
10609 {
10610 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10611
10612 if (globals->use_rel)
10613 {
10614 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
10615 signed_addend = (addend ^ 0x8000) - 0x8000;
10616 }
10617
10618 value += signed_addend;
10619
10620 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
10621 value -= (input_section->output_section->vma
10622 + input_section->output_offset + rel->r_offset);
10623
10624 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
10625 return bfd_reloc_overflow;
10626
10627 if (branch_type == ST_BRANCH_TO_THUMB)
10628 value |= 1;
10629
10630 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
10631 || r_type == R_ARM_MOVT_BREL)
10632 value >>= 16;
10633
10634 insn &= 0xfff0f000;
10635 insn |= value & 0xfff;
10636 insn |= (value & 0xf000) << 4;
10637 bfd_put_32 (input_bfd, insn, hit_data);
10638 }
10639 return bfd_reloc_ok;
10640
10641 case R_ARM_THM_MOVW_ABS_NC:
10642 case R_ARM_THM_MOVT_ABS:
10643 case R_ARM_THM_MOVW_PREL_NC:
10644 case R_ARM_THM_MOVT_PREL:
10645 /* Until we properly support segment-base-relative addressing then
10646 we assume the segment base to be zero, as for the above relocations.
10647 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
10648 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
10649 as R_ARM_THM_MOVT_ABS. */
10650 case R_ARM_THM_MOVW_BREL_NC:
10651 case R_ARM_THM_MOVW_BREL:
10652 case R_ARM_THM_MOVT_BREL:
10653 {
10654 bfd_vma insn;
10655
10656 insn = bfd_get_16 (input_bfd, hit_data) << 16;
10657 insn |= bfd_get_16 (input_bfd, hit_data + 2);
10658
10659 if (globals->use_rel)
10660 {
10661 addend = ((insn >> 4) & 0xf000)
10662 | ((insn >> 15) & 0x0800)
10663 | ((insn >> 4) & 0x0700)
10664 | (insn & 0x00ff);
10665 signed_addend = (addend ^ 0x8000) - 0x8000;
10666 }
10667
10668 value += signed_addend;
10669
10670 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
10671 value -= (input_section->output_section->vma
10672 + input_section->output_offset + rel->r_offset);
10673
10674 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
10675 return bfd_reloc_overflow;
10676
10677 if (branch_type == ST_BRANCH_TO_THUMB)
10678 value |= 1;
10679
10680 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
10681 || r_type == R_ARM_THM_MOVT_BREL)
10682 value >>= 16;
10683
10684 insn &= 0xfbf08f00;
10685 insn |= (value & 0xf000) << 4;
10686 insn |= (value & 0x0800) << 15;
10687 insn |= (value & 0x0700) << 4;
10688 insn |= (value & 0x00ff);
10689
10690 bfd_put_16 (input_bfd, insn >> 16, hit_data);
10691 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
10692 }
10693 return bfd_reloc_ok;
10694
10695 case R_ARM_ALU_PC_G0_NC:
10696 case R_ARM_ALU_PC_G1_NC:
10697 case R_ARM_ALU_PC_G0:
10698 case R_ARM_ALU_PC_G1:
10699 case R_ARM_ALU_PC_G2:
10700 case R_ARM_ALU_SB_G0_NC:
10701 case R_ARM_ALU_SB_G1_NC:
10702 case R_ARM_ALU_SB_G0:
10703 case R_ARM_ALU_SB_G1:
10704 case R_ARM_ALU_SB_G2:
10705 {
10706 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10707 bfd_vma pc = input_section->output_section->vma
10708 + input_section->output_offset + rel->r_offset;
10709 /* sb is the origin of the *segment* containing the symbol. */
10710 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
10711 bfd_vma residual;
10712 bfd_vma g_n;
10713 bfd_signed_vma signed_value;
10714 int group = 0;
10715
10716 /* Determine which group of bits to select. */
10717 switch (r_type)
10718 {
10719 case R_ARM_ALU_PC_G0_NC:
10720 case R_ARM_ALU_PC_G0:
10721 case R_ARM_ALU_SB_G0_NC:
10722 case R_ARM_ALU_SB_G0:
10723 group = 0;
10724 break;
10725
10726 case R_ARM_ALU_PC_G1_NC:
10727 case R_ARM_ALU_PC_G1:
10728 case R_ARM_ALU_SB_G1_NC:
10729 case R_ARM_ALU_SB_G1:
10730 group = 1;
10731 break;
10732
10733 case R_ARM_ALU_PC_G2:
10734 case R_ARM_ALU_SB_G2:
10735 group = 2;
10736 break;
10737
10738 default:
10739 abort ();
10740 }
10741
10742 /* If REL, extract the addend from the insn. If RELA, it will
10743 have already been fetched for us. */
10744 if (globals->use_rel)
10745 {
10746 int negative;
10747 bfd_vma constant = insn & 0xff;
10748 bfd_vma rotation = (insn & 0xf00) >> 8;
10749
10750 if (rotation == 0)
10751 signed_addend = constant;
10752 else
10753 {
10754 /* Compensate for the fact that in the instruction, the
10755 rotation is stored in multiples of 2 bits. */
10756 rotation *= 2;
10757
10758 /* Rotate "constant" right by "rotation" bits. */
10759 signed_addend = (constant >> rotation) |
10760 (constant << (8 * sizeof (bfd_vma) - rotation));
10761 }
10762
10763 /* Determine if the instruction is an ADD or a SUB.
10764 (For REL, this determines the sign of the addend.) */
10765 negative = identify_add_or_sub (insn);
10766 if (negative == 0)
10767 {
10768 (*_bfd_error_handler)
10769 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
10770 input_bfd, input_section,
10771 (long) rel->r_offset, howto->name);
10772 return bfd_reloc_overflow;
10773 }
10774
10775 signed_addend *= negative;
10776 }
10777
10778 /* Compute the value (X) to go in the place. */
10779 if (r_type == R_ARM_ALU_PC_G0_NC
10780 || r_type == R_ARM_ALU_PC_G1_NC
10781 || r_type == R_ARM_ALU_PC_G0
10782 || r_type == R_ARM_ALU_PC_G1
10783 || r_type == R_ARM_ALU_PC_G2)
10784 /* PC relative. */
10785 signed_value = value - pc + signed_addend;
10786 else
10787 /* Section base relative. */
10788 signed_value = value - sb + signed_addend;
10789
10790 /* If the target symbol is a Thumb function, then set the
10791 Thumb bit in the address. */
10792 if (branch_type == ST_BRANCH_TO_THUMB)
10793 signed_value |= 1;
10794
10795 /* Calculate the value of the relevant G_n, in encoded
10796 constant-with-rotation format. */
10797 g_n = calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
10798 group, &residual);
10799
10800 /* Check for overflow if required. */
10801 if ((r_type == R_ARM_ALU_PC_G0
10802 || r_type == R_ARM_ALU_PC_G1
10803 || r_type == R_ARM_ALU_PC_G2
10804 || r_type == R_ARM_ALU_SB_G0
10805 || r_type == R_ARM_ALU_SB_G1
10806 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
10807 {
10808 (*_bfd_error_handler)
10809 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10810 input_bfd, input_section,
10811 (long) rel->r_offset, signed_value < 0 ? - signed_value : signed_value,
10812 howto->name);
10813 return bfd_reloc_overflow;
10814 }
10815
10816 /* Mask out the value and the ADD/SUB part of the opcode; take care
10817 not to destroy the S bit. */
10818 insn &= 0xff1ff000;
10819
10820 /* Set the opcode according to whether the value to go in the
10821 place is negative. */
10822 if (signed_value < 0)
10823 insn |= 1 << 22;
10824 else
10825 insn |= 1 << 23;
10826
10827 /* Encode the offset. */
10828 insn |= g_n;
10829
10830 bfd_put_32 (input_bfd, insn, hit_data);
10831 }
10832 return bfd_reloc_ok;
10833
10834 case R_ARM_LDR_PC_G0:
10835 case R_ARM_LDR_PC_G1:
10836 case R_ARM_LDR_PC_G2:
10837 case R_ARM_LDR_SB_G0:
10838 case R_ARM_LDR_SB_G1:
10839 case R_ARM_LDR_SB_G2:
10840 {
10841 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10842 bfd_vma pc = input_section->output_section->vma
10843 + input_section->output_offset + rel->r_offset;
10844 /* sb is the origin of the *segment* containing the symbol. */
10845 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
10846 bfd_vma residual;
10847 bfd_signed_vma signed_value;
10848 int group = 0;
10849
10850 /* Determine which groups of bits to calculate. */
10851 switch (r_type)
10852 {
10853 case R_ARM_LDR_PC_G0:
10854 case R_ARM_LDR_SB_G0:
10855 group = 0;
10856 break;
10857
10858 case R_ARM_LDR_PC_G1:
10859 case R_ARM_LDR_SB_G1:
10860 group = 1;
10861 break;
10862
10863 case R_ARM_LDR_PC_G2:
10864 case R_ARM_LDR_SB_G2:
10865 group = 2;
10866 break;
10867
10868 default:
10869 abort ();
10870 }
10871
10872 /* If REL, extract the addend from the insn. If RELA, it will
10873 have already been fetched for us. */
10874 if (globals->use_rel)
10875 {
10876 int negative = (insn & (1 << 23)) ? 1 : -1;
10877 signed_addend = negative * (insn & 0xfff);
10878 }
10879
10880 /* Compute the value (X) to go in the place. */
10881 if (r_type == R_ARM_LDR_PC_G0
10882 || r_type == R_ARM_LDR_PC_G1
10883 || r_type == R_ARM_LDR_PC_G2)
10884 /* PC relative. */
10885 signed_value = value - pc + signed_addend;
10886 else
10887 /* Section base relative. */
10888 signed_value = value - sb + signed_addend;
10889
10890 /* Calculate the value of the relevant G_{n-1} to obtain
10891 the residual at that stage. */
10892 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
10893 group - 1, &residual);
10894
10895 /* Check for overflow. */
10896 if (residual >= 0x1000)
10897 {
10898 (*_bfd_error_handler)
10899 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10900 input_bfd, input_section,
10901 (long) rel->r_offset, labs (signed_value), howto->name);
10902 return bfd_reloc_overflow;
10903 }
10904
10905 /* Mask out the value and U bit. */
10906 insn &= 0xff7ff000;
10907
10908 /* Set the U bit if the value to go in the place is non-negative. */
10909 if (signed_value >= 0)
10910 insn |= 1 << 23;
10911
10912 /* Encode the offset. */
10913 insn |= residual;
10914
10915 bfd_put_32 (input_bfd, insn, hit_data);
10916 }
10917 return bfd_reloc_ok;
10918
10919 case R_ARM_LDRS_PC_G0:
10920 case R_ARM_LDRS_PC_G1:
10921 case R_ARM_LDRS_PC_G2:
10922 case R_ARM_LDRS_SB_G0:
10923 case R_ARM_LDRS_SB_G1:
10924 case R_ARM_LDRS_SB_G2:
10925 {
10926 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
10927 bfd_vma pc = input_section->output_section->vma
10928 + input_section->output_offset + rel->r_offset;
10929 /* sb is the origin of the *segment* containing the symbol. */
10930 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
10931 bfd_vma residual;
10932 bfd_signed_vma signed_value;
10933 int group = 0;
10934
10935 /* Determine which groups of bits to calculate. */
10936 switch (r_type)
10937 {
10938 case R_ARM_LDRS_PC_G0:
10939 case R_ARM_LDRS_SB_G0:
10940 group = 0;
10941 break;
10942
10943 case R_ARM_LDRS_PC_G1:
10944 case R_ARM_LDRS_SB_G1:
10945 group = 1;
10946 break;
10947
10948 case R_ARM_LDRS_PC_G2:
10949 case R_ARM_LDRS_SB_G2:
10950 group = 2;
10951 break;
10952
10953 default:
10954 abort ();
10955 }
10956
10957 /* If REL, extract the addend from the insn. If RELA, it will
10958 have already been fetched for us. */
10959 if (globals->use_rel)
10960 {
10961 int negative = (insn & (1 << 23)) ? 1 : -1;
10962 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
10963 }
10964
10965 /* Compute the value (X) to go in the place. */
10966 if (r_type == R_ARM_LDRS_PC_G0
10967 || r_type == R_ARM_LDRS_PC_G1
10968 || r_type == R_ARM_LDRS_PC_G2)
10969 /* PC relative. */
10970 signed_value = value - pc + signed_addend;
10971 else
10972 /* Section base relative. */
10973 signed_value = value - sb + signed_addend;
10974
10975 /* Calculate the value of the relevant G_{n-1} to obtain
10976 the residual at that stage. */
10977 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
10978 group - 1, &residual);
10979
10980 /* Check for overflow. */
10981 if (residual >= 0x100)
10982 {
10983 (*_bfd_error_handler)
10984 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
10985 input_bfd, input_section,
10986 (long) rel->r_offset, labs (signed_value), howto->name);
10987 return bfd_reloc_overflow;
10988 }
10989
10990 /* Mask out the value and U bit. */
10991 insn &= 0xff7ff0f0;
10992
10993 /* Set the U bit if the value to go in the place is non-negative. */
10994 if (signed_value >= 0)
10995 insn |= 1 << 23;
10996
10997 /* Encode the offset. */
10998 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
10999
11000 bfd_put_32 (input_bfd, insn, hit_data);
11001 }
11002 return bfd_reloc_ok;
11003
11004 case R_ARM_LDC_PC_G0:
11005 case R_ARM_LDC_PC_G1:
11006 case R_ARM_LDC_PC_G2:
11007 case R_ARM_LDC_SB_G0:
11008 case R_ARM_LDC_SB_G1:
11009 case R_ARM_LDC_SB_G2:
11010 {
11011 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
11012 bfd_vma pc = input_section->output_section->vma
11013 + input_section->output_offset + rel->r_offset;
11014 /* sb is the origin of the *segment* containing the symbol. */
11015 bfd_vma sb = sym_sec ? sym_sec->output_section->vma : 0;
11016 bfd_vma residual;
11017 bfd_signed_vma signed_value;
11018 int group = 0;
11019
11020 /* Determine which groups of bits to calculate. */
11021 switch (r_type)
11022 {
11023 case R_ARM_LDC_PC_G0:
11024 case R_ARM_LDC_SB_G0:
11025 group = 0;
11026 break;
11027
11028 case R_ARM_LDC_PC_G1:
11029 case R_ARM_LDC_SB_G1:
11030 group = 1;
11031 break;
11032
11033 case R_ARM_LDC_PC_G2:
11034 case R_ARM_LDC_SB_G2:
11035 group = 2;
11036 break;
11037
11038 default:
11039 abort ();
11040 }
11041
11042 /* If REL, extract the addend from the insn. If RELA, it will
11043 have already been fetched for us. */
11044 if (globals->use_rel)
11045 {
11046 int negative = (insn & (1 << 23)) ? 1 : -1;
11047 signed_addend = negative * ((insn & 0xff) << 2);
11048 }
11049
11050 /* Compute the value (X) to go in the place. */
11051 if (r_type == R_ARM_LDC_PC_G0
11052 || r_type == R_ARM_LDC_PC_G1
11053 || r_type == R_ARM_LDC_PC_G2)
11054 /* PC relative. */
11055 signed_value = value - pc + signed_addend;
11056 else
11057 /* Section base relative. */
11058 signed_value = value - sb + signed_addend;
11059
11060 /* Calculate the value of the relevant G_{n-1} to obtain
11061 the residual at that stage. */
11062 calculate_group_reloc_mask (signed_value < 0 ? - signed_value : signed_value,
11063 group - 1, &residual);
11064
11065 /* Check for overflow. (The absolute value to go in the place must be
11066 divisible by four and, after having been divided by four, must
11067 fit in eight bits.) */
11068 if ((residual & 0x3) != 0 || residual >= 0x400)
11069 {
11070 (*_bfd_error_handler)
11071 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
11072 input_bfd, input_section,
11073 (long) rel->r_offset, labs (signed_value), howto->name);
11074 return bfd_reloc_overflow;
11075 }
11076
11077 /* Mask out the value and U bit. */
11078 insn &= 0xff7fff00;
11079
11080 /* Set the U bit if the value to go in the place is non-negative. */
11081 if (signed_value >= 0)
11082 insn |= 1 << 23;
11083
11084 /* Encode the offset. */
11085 insn |= residual >> 2;
11086
11087 bfd_put_32 (input_bfd, insn, hit_data);
11088 }
11089 return bfd_reloc_ok;
11090
11091 case R_ARM_THM_ALU_ABS_G0_NC:
11092 case R_ARM_THM_ALU_ABS_G1_NC:
11093 case R_ARM_THM_ALU_ABS_G2_NC:
11094 case R_ARM_THM_ALU_ABS_G3_NC:
11095 {
11096 const int shift_array[4] = {0, 8, 16, 24};
11097 bfd_vma insn = bfd_get_16 (input_bfd, hit_data);
11098 bfd_vma addr = value;
11099 int shift = shift_array[r_type - R_ARM_THM_ALU_ABS_G0_NC];
11100
11101 /* Compute address. */
11102 if (globals->use_rel)
11103 signed_addend = insn & 0xff;
11104 addr += signed_addend;
11105 if (branch_type == ST_BRANCH_TO_THUMB)
11106 addr |= 1;
11107 /* Clean imm8 insn. */
11108 insn &= 0xff00;
11109 /* And update with correct part of address. */
11110 insn |= (addr >> shift) & 0xff;
11111 /* Update insn. */
11112 bfd_put_16 (input_bfd, insn, hit_data);
11113 }
11114
11115 *unresolved_reloc_p = FALSE;
11116 return bfd_reloc_ok;
11117
11118 default:
11119 return bfd_reloc_notsupported;
11120 }
11121 }
11122
11123 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
11124 static void
11125 arm_add_to_rel (bfd * abfd,
11126 bfd_byte * address,
11127 reloc_howto_type * howto,
11128 bfd_signed_vma increment)
11129 {
11130 bfd_signed_vma addend;
11131
11132 if (howto->type == R_ARM_THM_CALL
11133 || howto->type == R_ARM_THM_JUMP24)
11134 {
11135 int upper_insn, lower_insn;
11136 int upper, lower;
11137
11138 upper_insn = bfd_get_16 (abfd, address);
11139 lower_insn = bfd_get_16 (abfd, address + 2);
11140 upper = upper_insn & 0x7ff;
11141 lower = lower_insn & 0x7ff;
11142
11143 addend = (upper << 12) | (lower << 1);
11144 addend += increment;
11145 addend >>= 1;
11146
11147 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
11148 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
11149
11150 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
11151 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
11152 }
11153 else
11154 {
11155 bfd_vma contents;
11156
11157 contents = bfd_get_32 (abfd, address);
11158
11159 /* Get the (signed) value from the instruction. */
11160 addend = contents & howto->src_mask;
11161 if (addend & ((howto->src_mask + 1) >> 1))
11162 {
11163 bfd_signed_vma mask;
11164
11165 mask = -1;
11166 mask &= ~ howto->src_mask;
11167 addend |= mask;
11168 }
11169
11170 /* Add in the increment, (which is a byte value). */
11171 switch (howto->type)
11172 {
11173 default:
11174 addend += increment;
11175 break;
11176
11177 case R_ARM_PC24:
11178 case R_ARM_PLT32:
11179 case R_ARM_CALL:
11180 case R_ARM_JUMP24:
11181 addend <<= howto->size;
11182 addend += increment;
11183
11184 /* Should we check for overflow here ? */
11185
11186 /* Drop any undesired bits. */
11187 addend >>= howto->rightshift;
11188 break;
11189 }
11190
11191 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
11192
11193 bfd_put_32 (abfd, contents, address);
11194 }
11195 }
11196
11197 #define IS_ARM_TLS_RELOC(R_TYPE) \
11198 ((R_TYPE) == R_ARM_TLS_GD32 \
11199 || (R_TYPE) == R_ARM_TLS_LDO32 \
11200 || (R_TYPE) == R_ARM_TLS_LDM32 \
11201 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
11202 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
11203 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
11204 || (R_TYPE) == R_ARM_TLS_LE32 \
11205 || (R_TYPE) == R_ARM_TLS_IE32 \
11206 || IS_ARM_TLS_GNU_RELOC (R_TYPE))
11207
11208 /* Specific set of relocations for the gnu tls dialect. */
11209 #define IS_ARM_TLS_GNU_RELOC(R_TYPE) \
11210 ((R_TYPE) == R_ARM_TLS_GOTDESC \
11211 || (R_TYPE) == R_ARM_TLS_CALL \
11212 || (R_TYPE) == R_ARM_THM_TLS_CALL \
11213 || (R_TYPE) == R_ARM_TLS_DESCSEQ \
11214 || (R_TYPE) == R_ARM_THM_TLS_DESCSEQ)
11215
11216 /* Relocate an ARM ELF section. */
11217
11218 static bfd_boolean
11219 elf32_arm_relocate_section (bfd * output_bfd,
11220 struct bfd_link_info * info,
11221 bfd * input_bfd,
11222 asection * input_section,
11223 bfd_byte * contents,
11224 Elf_Internal_Rela * relocs,
11225 Elf_Internal_Sym * local_syms,
11226 asection ** local_sections)
11227 {
11228 Elf_Internal_Shdr *symtab_hdr;
11229 struct elf_link_hash_entry **sym_hashes;
11230 Elf_Internal_Rela *rel;
11231 Elf_Internal_Rela *relend;
11232 const char *name;
11233 struct elf32_arm_link_hash_table * globals;
11234
11235 globals = elf32_arm_hash_table (info);
11236 if (globals == NULL)
11237 return FALSE;
11238
11239 symtab_hdr = & elf_symtab_hdr (input_bfd);
11240 sym_hashes = elf_sym_hashes (input_bfd);
11241
11242 rel = relocs;
11243 relend = relocs + input_section->reloc_count;
11244 for (; rel < relend; rel++)
11245 {
11246 int r_type;
11247 reloc_howto_type * howto;
11248 unsigned long r_symndx;
11249 Elf_Internal_Sym * sym;
11250 asection * sec;
11251 struct elf_link_hash_entry * h;
11252 bfd_vma relocation;
11253 bfd_reloc_status_type r;
11254 arelent bfd_reloc;
11255 char sym_type;
11256 bfd_boolean unresolved_reloc = FALSE;
11257 char *error_message = NULL;
11258
11259 r_symndx = ELF32_R_SYM (rel->r_info);
11260 r_type = ELF32_R_TYPE (rel->r_info);
11261 r_type = arm_real_reloc_type (globals, r_type);
11262
11263 if ( r_type == R_ARM_GNU_VTENTRY
11264 || r_type == R_ARM_GNU_VTINHERIT)
11265 continue;
11266
11267 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
11268 howto = bfd_reloc.howto;
11269
11270 h = NULL;
11271 sym = NULL;
11272 sec = NULL;
11273
11274 if (r_symndx < symtab_hdr->sh_info)
11275 {
11276 sym = local_syms + r_symndx;
11277 sym_type = ELF32_ST_TYPE (sym->st_info);
11278 sec = local_sections[r_symndx];
11279
11280 /* An object file might have a reference to a local
11281 undefined symbol. This is a daft object file, but we
11282 should at least do something about it. V4BX & NONE
11283 relocations do not use the symbol and are explicitly
11284 allowed to use the undefined symbol, so allow those.
11285 Likewise for relocations against STN_UNDEF. */
11286 if (r_type != R_ARM_V4BX
11287 && r_type != R_ARM_NONE
11288 && r_symndx != STN_UNDEF
11289 && bfd_is_und_section (sec)
11290 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
11291 {
11292 if (!info->callbacks->undefined_symbol
11293 (info, bfd_elf_string_from_elf_section
11294 (input_bfd, symtab_hdr->sh_link, sym->st_name),
11295 input_bfd, input_section,
11296 rel->r_offset, TRUE))
11297 return FALSE;
11298 }
11299
11300 if (globals->use_rel)
11301 {
11302 relocation = (sec->output_section->vma
11303 + sec->output_offset
11304 + sym->st_value);
11305 if (!bfd_link_relocatable (info)
11306 && (sec->flags & SEC_MERGE)
11307 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11308 {
11309 asection *msec;
11310 bfd_vma addend, value;
11311
11312 switch (r_type)
11313 {
11314 case R_ARM_MOVW_ABS_NC:
11315 case R_ARM_MOVT_ABS:
11316 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
11317 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
11318 addend = (addend ^ 0x8000) - 0x8000;
11319 break;
11320
11321 case R_ARM_THM_MOVW_ABS_NC:
11322 case R_ARM_THM_MOVT_ABS:
11323 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
11324 << 16;
11325 value |= bfd_get_16 (input_bfd,
11326 contents + rel->r_offset + 2);
11327 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
11328 | ((value & 0x04000000) >> 15);
11329 addend = (addend ^ 0x8000) - 0x8000;
11330 break;
11331
11332 default:
11333 if (howto->rightshift
11334 || (howto->src_mask & (howto->src_mask + 1)))
11335 {
11336 (*_bfd_error_handler)
11337 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
11338 input_bfd, input_section,
11339 (long) rel->r_offset, howto->name);
11340 return FALSE;
11341 }
11342
11343 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
11344
11345 /* Get the (signed) value from the instruction. */
11346 addend = value & howto->src_mask;
11347 if (addend & ((howto->src_mask + 1) >> 1))
11348 {
11349 bfd_signed_vma mask;
11350
11351 mask = -1;
11352 mask &= ~ howto->src_mask;
11353 addend |= mask;
11354 }
11355 break;
11356 }
11357
11358 msec = sec;
11359 addend =
11360 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
11361 - relocation;
11362 addend += msec->output_section->vma + msec->output_offset;
11363
11364 /* Cases here must match those in the preceding
11365 switch statement. */
11366 switch (r_type)
11367 {
11368 case R_ARM_MOVW_ABS_NC:
11369 case R_ARM_MOVT_ABS:
11370 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
11371 | (addend & 0xfff);
11372 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
11373 break;
11374
11375 case R_ARM_THM_MOVW_ABS_NC:
11376 case R_ARM_THM_MOVT_ABS:
11377 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
11378 | (addend & 0xff) | ((addend & 0x0800) << 15);
11379 bfd_put_16 (input_bfd, value >> 16,
11380 contents + rel->r_offset);
11381 bfd_put_16 (input_bfd, value,
11382 contents + rel->r_offset + 2);
11383 break;
11384
11385 default:
11386 value = (value & ~ howto->dst_mask)
11387 | (addend & howto->dst_mask);
11388 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
11389 break;
11390 }
11391 }
11392 }
11393 else
11394 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11395 }
11396 else
11397 {
11398 bfd_boolean warned, ignored;
11399
11400 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11401 r_symndx, symtab_hdr, sym_hashes,
11402 h, sec, relocation,
11403 unresolved_reloc, warned, ignored);
11404
11405 sym_type = h->type;
11406 }
11407
11408 if (sec != NULL && discarded_section (sec))
11409 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11410 rel, 1, relend, howto, 0, contents);
11411
11412 if (bfd_link_relocatable (info))
11413 {
11414 /* This is a relocatable link. We don't have to change
11415 anything, unless the reloc is against a section symbol,
11416 in which case we have to adjust according to where the
11417 section symbol winds up in the output section. */
11418 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11419 {
11420 if (globals->use_rel)
11421 arm_add_to_rel (input_bfd, contents + rel->r_offset,
11422 howto, (bfd_signed_vma) sec->output_offset);
11423 else
11424 rel->r_addend += sec->output_offset;
11425 }
11426 continue;
11427 }
11428
11429 if (h != NULL)
11430 name = h->root.root.string;
11431 else
11432 {
11433 name = (bfd_elf_string_from_elf_section
11434 (input_bfd, symtab_hdr->sh_link, sym->st_name));
11435 if (name == NULL || *name == '\0')
11436 name = bfd_section_name (input_bfd, sec);
11437 }
11438
11439 if (r_symndx != STN_UNDEF
11440 && r_type != R_ARM_NONE
11441 && (h == NULL
11442 || h->root.type == bfd_link_hash_defined
11443 || h->root.type == bfd_link_hash_defweak)
11444 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
11445 {
11446 (*_bfd_error_handler)
11447 ((sym_type == STT_TLS
11448 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11449 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
11450 input_bfd,
11451 input_section,
11452 (long) rel->r_offset,
11453 howto->name,
11454 name);
11455 }
11456
11457 /* We call elf32_arm_final_link_relocate unless we're completely
11458 done, i.e., the relaxation produced the final output we want,
11459 and we won't let anybody mess with it. Also, we have to do
11460 addend adjustments in case of a R_ARM_TLS_GOTDESC relocation
11461 both in relaxed and non-relaxed cases. */
11462 if ((elf32_arm_tls_transition (info, r_type, h) != (unsigned)r_type)
11463 || (IS_ARM_TLS_GNU_RELOC (r_type)
11464 && !((h ? elf32_arm_hash_entry (h)->tls_type :
11465 elf32_arm_local_got_tls_type (input_bfd)[r_symndx])
11466 & GOT_TLS_GDESC)))
11467 {
11468 r = elf32_arm_tls_relax (globals, input_bfd, input_section,
11469 contents, rel, h == NULL);
11470 /* This may have been marked unresolved because it came from
11471 a shared library. But we've just dealt with that. */
11472 unresolved_reloc = 0;
11473 }
11474 else
11475 r = bfd_reloc_continue;
11476
11477 if (r == bfd_reloc_continue)
11478 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
11479 input_section, contents, rel,
11480 relocation, info, sec, name, sym_type,
11481 (h ? h->target_internal
11482 : ARM_SYM_BRANCH_TYPE (sym)), h,
11483 &unresolved_reloc, &error_message);
11484
11485 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11486 because such sections are not SEC_ALLOC and thus ld.so will
11487 not process them. */
11488 if (unresolved_reloc
11489 && !((input_section->flags & SEC_DEBUGGING) != 0
11490 && h->def_dynamic)
11491 && _bfd_elf_section_offset (output_bfd, info, input_section,
11492 rel->r_offset) != (bfd_vma) -1)
11493 {
11494 (*_bfd_error_handler)
11495 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11496 input_bfd,
11497 input_section,
11498 (long) rel->r_offset,
11499 howto->name,
11500 h->root.root.string);
11501 return FALSE;
11502 }
11503
11504 if (r != bfd_reloc_ok)
11505 {
11506 switch (r)
11507 {
11508 case bfd_reloc_overflow:
11509 /* If the overflowing reloc was to an undefined symbol,
11510 we have already printed one error message and there
11511 is no point complaining again. */
11512 if ((! h ||
11513 h->root.type != bfd_link_hash_undefined)
11514 && (!((*info->callbacks->reloc_overflow)
11515 (info, (h ? &h->root : NULL), name, howto->name,
11516 (bfd_vma) 0, input_bfd, input_section,
11517 rel->r_offset))))
11518 return FALSE;
11519 break;
11520
11521 case bfd_reloc_undefined:
11522 if (!((*info->callbacks->undefined_symbol)
11523 (info, name, input_bfd, input_section,
11524 rel->r_offset, TRUE)))
11525 return FALSE;
11526 break;
11527
11528 case bfd_reloc_outofrange:
11529 error_message = _("out of range");
11530 goto common_error;
11531
11532 case bfd_reloc_notsupported:
11533 error_message = _("unsupported relocation");
11534 goto common_error;
11535
11536 case bfd_reloc_dangerous:
11537 /* error_message should already be set. */
11538 goto common_error;
11539
11540 default:
11541 error_message = _("unknown error");
11542 /* Fall through. */
11543
11544 common_error:
11545 BFD_ASSERT (error_message != NULL);
11546 if (!((*info->callbacks->reloc_dangerous)
11547 (info, error_message, input_bfd, input_section,
11548 rel->r_offset)))
11549 return FALSE;
11550 break;
11551 }
11552 }
11553 }
11554
11555 return TRUE;
11556 }
11557
11558 /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero,
11559 adds the edit to the start of the list. (The list must be built in order of
11560 ascending TINDEX: the function's callers are primarily responsible for
11561 maintaining that condition). */
11562
11563 static void
11564 add_unwind_table_edit (arm_unwind_table_edit **head,
11565 arm_unwind_table_edit **tail,
11566 arm_unwind_edit_type type,
11567 asection *linked_section,
11568 unsigned int tindex)
11569 {
11570 arm_unwind_table_edit *new_edit = (arm_unwind_table_edit *)
11571 xmalloc (sizeof (arm_unwind_table_edit));
11572
11573 new_edit->type = type;
11574 new_edit->linked_section = linked_section;
11575 new_edit->index = tindex;
11576
11577 if (tindex > 0)
11578 {
11579 new_edit->next = NULL;
11580
11581 if (*tail)
11582 (*tail)->next = new_edit;
11583
11584 (*tail) = new_edit;
11585
11586 if (!*head)
11587 (*head) = new_edit;
11588 }
11589 else
11590 {
11591 new_edit->next = *head;
11592
11593 if (!*tail)
11594 *tail = new_edit;
11595
11596 *head = new_edit;
11597 }
11598 }
11599
11600 static _arm_elf_section_data *get_arm_elf_section_data (asection *);
11601
11602 /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */
11603 static void
11604 adjust_exidx_size(asection *exidx_sec, int adjust)
11605 {
11606 asection *out_sec;
11607
11608 if (!exidx_sec->rawsize)
11609 exidx_sec->rawsize = exidx_sec->size;
11610
11611 bfd_set_section_size (exidx_sec->owner, exidx_sec, exidx_sec->size + adjust);
11612 out_sec = exidx_sec->output_section;
11613 /* Adjust size of output section. */
11614 bfd_set_section_size (out_sec->owner, out_sec, out_sec->size +adjust);
11615 }
11616
11617 /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */
11618 static void
11619 insert_cantunwind_after(asection *text_sec, asection *exidx_sec)
11620 {
11621 struct _arm_elf_section_data *exidx_arm_data;
11622
11623 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
11624 add_unwind_table_edit (
11625 &exidx_arm_data->u.exidx.unwind_edit_list,
11626 &exidx_arm_data->u.exidx.unwind_edit_tail,
11627 INSERT_EXIDX_CANTUNWIND_AT_END, text_sec, UINT_MAX);
11628
11629 exidx_arm_data->additional_reloc_count++;
11630
11631 adjust_exidx_size(exidx_sec, 8);
11632 }
11633
11634 /* Scan .ARM.exidx tables, and create a list describing edits which should be
11635 made to those tables, such that:
11636
11637 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries.
11638 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind
11639 codes which have been inlined into the index).
11640
11641 If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged.
11642
11643 The edits are applied when the tables are written
11644 (in elf32_arm_write_section). */
11645
11646 bfd_boolean
11647 elf32_arm_fix_exidx_coverage (asection **text_section_order,
11648 unsigned int num_text_sections,
11649 struct bfd_link_info *info,
11650 bfd_boolean merge_exidx_entries)
11651 {
11652 bfd *inp;
11653 unsigned int last_second_word = 0, i;
11654 asection *last_exidx_sec = NULL;
11655 asection *last_text_sec = NULL;
11656 int last_unwind_type = -1;
11657
11658 /* Walk over all EXIDX sections, and create backlinks from the corrsponding
11659 text sections. */
11660 for (inp = info->input_bfds; inp != NULL; inp = inp->link.next)
11661 {
11662 asection *sec;
11663
11664 for (sec = inp->sections; sec != NULL; sec = sec->next)
11665 {
11666 struct bfd_elf_section_data *elf_sec = elf_section_data (sec);
11667 Elf_Internal_Shdr *hdr = &elf_sec->this_hdr;
11668
11669 if (!hdr || hdr->sh_type != SHT_ARM_EXIDX)
11670 continue;
11671
11672 if (elf_sec->linked_to)
11673 {
11674 Elf_Internal_Shdr *linked_hdr
11675 = &elf_section_data (elf_sec->linked_to)->this_hdr;
11676 struct _arm_elf_section_data *linked_sec_arm_data
11677 = get_arm_elf_section_data (linked_hdr->bfd_section);
11678
11679 if (linked_sec_arm_data == NULL)
11680 continue;
11681
11682 /* Link this .ARM.exidx section back from the text section it
11683 describes. */
11684 linked_sec_arm_data->u.text.arm_exidx_sec = sec;
11685 }
11686 }
11687 }
11688
11689 /* Walk all text sections in order of increasing VMA. Eilminate duplicate
11690 index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes),
11691 and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */
11692
11693 for (i = 0; i < num_text_sections; i++)
11694 {
11695 asection *sec = text_section_order[i];
11696 asection *exidx_sec;
11697 struct _arm_elf_section_data *arm_data = get_arm_elf_section_data (sec);
11698 struct _arm_elf_section_data *exidx_arm_data;
11699 bfd_byte *contents = NULL;
11700 int deleted_exidx_bytes = 0;
11701 bfd_vma j;
11702 arm_unwind_table_edit *unwind_edit_head = NULL;
11703 arm_unwind_table_edit *unwind_edit_tail = NULL;
11704 Elf_Internal_Shdr *hdr;
11705 bfd *ibfd;
11706
11707 if (arm_data == NULL)
11708 continue;
11709
11710 exidx_sec = arm_data->u.text.arm_exidx_sec;
11711 if (exidx_sec == NULL)
11712 {
11713 /* Section has no unwind data. */
11714 if (last_unwind_type == 0 || !last_exidx_sec)
11715 continue;
11716
11717 /* Ignore zero sized sections. */
11718 if (sec->size == 0)
11719 continue;
11720
11721 insert_cantunwind_after(last_text_sec, last_exidx_sec);
11722 last_unwind_type = 0;
11723 continue;
11724 }
11725
11726 /* Skip /DISCARD/ sections. */
11727 if (bfd_is_abs_section (exidx_sec->output_section))
11728 continue;
11729
11730 hdr = &elf_section_data (exidx_sec)->this_hdr;
11731 if (hdr->sh_type != SHT_ARM_EXIDX)
11732 continue;
11733
11734 exidx_arm_data = get_arm_elf_section_data (exidx_sec);
11735 if (exidx_arm_data == NULL)
11736 continue;
11737
11738 ibfd = exidx_sec->owner;
11739
11740 if (hdr->contents != NULL)
11741 contents = hdr->contents;
11742 else if (! bfd_malloc_and_get_section (ibfd, exidx_sec, &contents))
11743 /* An error? */
11744 continue;
11745
11746 if (last_unwind_type > 0)
11747 {
11748 unsigned int first_word = bfd_get_32 (ibfd, contents);
11749 /* Add cantunwind if first unwind item does not match section
11750 start. */
11751 if (first_word != sec->vma)
11752 {
11753 insert_cantunwind_after (last_text_sec, last_exidx_sec);
11754 last_unwind_type = 0;
11755 }
11756 }
11757
11758 for (j = 0; j < hdr->sh_size; j += 8)
11759 {
11760 unsigned int second_word = bfd_get_32 (ibfd, contents + j + 4);
11761 int unwind_type;
11762 int elide = 0;
11763
11764 /* An EXIDX_CANTUNWIND entry. */
11765 if (second_word == 1)
11766 {
11767 if (last_unwind_type == 0)
11768 elide = 1;
11769 unwind_type = 0;
11770 }
11771 /* Inlined unwinding data. Merge if equal to previous. */
11772 else if ((second_word & 0x80000000) != 0)
11773 {
11774 if (merge_exidx_entries
11775 && last_second_word == second_word && last_unwind_type == 1)
11776 elide = 1;
11777 unwind_type = 1;
11778 last_second_word = second_word;
11779 }
11780 /* Normal table entry. In theory we could merge these too,
11781 but duplicate entries are likely to be much less common. */
11782 else
11783 unwind_type = 2;
11784
11785 if (elide && !bfd_link_relocatable (info))
11786 {
11787 add_unwind_table_edit (&unwind_edit_head, &unwind_edit_tail,
11788 DELETE_EXIDX_ENTRY, NULL, j / 8);
11789
11790 deleted_exidx_bytes += 8;
11791 }
11792
11793 last_unwind_type = unwind_type;
11794 }
11795
11796 /* Free contents if we allocated it ourselves. */
11797 if (contents != hdr->contents)
11798 free (contents);
11799
11800 /* Record edits to be applied later (in elf32_arm_write_section). */
11801 exidx_arm_data->u.exidx.unwind_edit_list = unwind_edit_head;
11802 exidx_arm_data->u.exidx.unwind_edit_tail = unwind_edit_tail;
11803
11804 if (deleted_exidx_bytes > 0)
11805 adjust_exidx_size(exidx_sec, -deleted_exidx_bytes);
11806
11807 last_exidx_sec = exidx_sec;
11808 last_text_sec = sec;
11809 }
11810
11811 /* Add terminating CANTUNWIND entry. */
11812 if (!bfd_link_relocatable (info) && last_exidx_sec
11813 && last_unwind_type != 0)
11814 insert_cantunwind_after(last_text_sec, last_exidx_sec);
11815
11816 return TRUE;
11817 }
11818
11819 static bfd_boolean
11820 elf32_arm_output_glue_section (struct bfd_link_info *info, bfd *obfd,
11821 bfd *ibfd, const char *name)
11822 {
11823 asection *sec, *osec;
11824
11825 sec = bfd_get_linker_section (ibfd, name);
11826 if (sec == NULL || (sec->flags & SEC_EXCLUDE) != 0)
11827 return TRUE;
11828
11829 osec = sec->output_section;
11830 if (elf32_arm_write_section (obfd, info, sec, sec->contents))
11831 return TRUE;
11832
11833 if (! bfd_set_section_contents (obfd, osec, sec->contents,
11834 sec->output_offset, sec->size))
11835 return FALSE;
11836
11837 return TRUE;
11838 }
11839
11840 static bfd_boolean
11841 elf32_arm_final_link (bfd *abfd, struct bfd_link_info *info)
11842 {
11843 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
11844 asection *sec, *osec;
11845
11846 if (globals == NULL)
11847 return FALSE;
11848
11849 /* Invoke the regular ELF backend linker to do all the work. */
11850 if (!bfd_elf_final_link (abfd, info))
11851 return FALSE;
11852
11853 /* Process stub sections (eg BE8 encoding, ...). */
11854 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
11855 unsigned int i;
11856 for (i=0; i<htab->top_id; i++)
11857 {
11858 sec = htab->stub_group[i].stub_sec;
11859 /* Only process it once, in its link_sec slot. */
11860 if (sec && i == htab->stub_group[i].link_sec->id)
11861 {
11862 osec = sec->output_section;
11863 elf32_arm_write_section (abfd, info, sec, sec->contents);
11864 if (! bfd_set_section_contents (abfd, osec, sec->contents,
11865 sec->output_offset, sec->size))
11866 return FALSE;
11867 }
11868 }
11869
11870 /* Write out any glue sections now that we have created all the
11871 stubs. */
11872 if (globals->bfd_of_glue_owner != NULL)
11873 {
11874 if (! elf32_arm_output_glue_section (info, abfd,
11875 globals->bfd_of_glue_owner,
11876 ARM2THUMB_GLUE_SECTION_NAME))
11877 return FALSE;
11878
11879 if (! elf32_arm_output_glue_section (info, abfd,
11880 globals->bfd_of_glue_owner,
11881 THUMB2ARM_GLUE_SECTION_NAME))
11882 return FALSE;
11883
11884 if (! elf32_arm_output_glue_section (info, abfd,
11885 globals->bfd_of_glue_owner,
11886 VFP11_ERRATUM_VENEER_SECTION_NAME))
11887 return FALSE;
11888
11889 if (! elf32_arm_output_glue_section (info, abfd,
11890 globals->bfd_of_glue_owner,
11891 STM32L4XX_ERRATUM_VENEER_SECTION_NAME))
11892 return FALSE;
11893
11894 if (! elf32_arm_output_glue_section (info, abfd,
11895 globals->bfd_of_glue_owner,
11896 ARM_BX_GLUE_SECTION_NAME))
11897 return FALSE;
11898 }
11899
11900 return TRUE;
11901 }
11902
11903 /* Return a best guess for the machine number based on the attributes. */
11904
11905 static unsigned int
11906 bfd_arm_get_mach_from_attributes (bfd * abfd)
11907 {
11908 int arch = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_CPU_arch);
11909
11910 switch (arch)
11911 {
11912 case TAG_CPU_ARCH_V4: return bfd_mach_arm_4;
11913 case TAG_CPU_ARCH_V4T: return bfd_mach_arm_4T;
11914 case TAG_CPU_ARCH_V5T: return bfd_mach_arm_5T;
11915
11916 case TAG_CPU_ARCH_V5TE:
11917 {
11918 char * name;
11919
11920 BFD_ASSERT (Tag_CPU_name < NUM_KNOWN_OBJ_ATTRIBUTES);
11921 name = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_CPU_name].s;
11922
11923 if (name)
11924 {
11925 if (strcmp (name, "IWMMXT2") == 0)
11926 return bfd_mach_arm_iWMMXt2;
11927
11928 if (strcmp (name, "IWMMXT") == 0)
11929 return bfd_mach_arm_iWMMXt;
11930
11931 if (strcmp (name, "XSCALE") == 0)
11932 {
11933 int wmmx;
11934
11935 BFD_ASSERT (Tag_WMMX_arch < NUM_KNOWN_OBJ_ATTRIBUTES);
11936 wmmx = elf_known_obj_attributes (abfd) [OBJ_ATTR_PROC][Tag_WMMX_arch].i;
11937 switch (wmmx)
11938 {
11939 case 1: return bfd_mach_arm_iWMMXt;
11940 case 2: return bfd_mach_arm_iWMMXt2;
11941 default: return bfd_mach_arm_XScale;
11942 }
11943 }
11944 }
11945
11946 return bfd_mach_arm_5TE;
11947 }
11948
11949 default:
11950 return bfd_mach_arm_unknown;
11951 }
11952 }
11953
11954 /* Set the right machine number. */
11955
11956 static bfd_boolean
11957 elf32_arm_object_p (bfd *abfd)
11958 {
11959 unsigned int mach;
11960
11961 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
11962
11963 if (mach == bfd_mach_arm_unknown)
11964 {
11965 if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
11966 mach = bfd_mach_arm_ep9312;
11967 else
11968 mach = bfd_arm_get_mach_from_attributes (abfd);
11969 }
11970
11971 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
11972 return TRUE;
11973 }
11974
11975 /* Function to keep ARM specific flags in the ELF header. */
11976
11977 static bfd_boolean
11978 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
11979 {
11980 if (elf_flags_init (abfd)
11981 && elf_elfheader (abfd)->e_flags != flags)
11982 {
11983 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
11984 {
11985 if (flags & EF_ARM_INTERWORK)
11986 (*_bfd_error_handler)
11987 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
11988 abfd);
11989 else
11990 _bfd_error_handler
11991 (_("Warning: Clearing the interworking flag of %B due to outside request"),
11992 abfd);
11993 }
11994 }
11995 else
11996 {
11997 elf_elfheader (abfd)->e_flags = flags;
11998 elf_flags_init (abfd) = TRUE;
11999 }
12000
12001 return TRUE;
12002 }
12003
12004 /* Copy backend specific data from one object module to another. */
12005
12006 static bfd_boolean
12007 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
12008 {
12009 flagword in_flags;
12010 flagword out_flags;
12011
12012 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
12013 return TRUE;
12014
12015 in_flags = elf_elfheader (ibfd)->e_flags;
12016 out_flags = elf_elfheader (obfd)->e_flags;
12017
12018 if (elf_flags_init (obfd)
12019 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
12020 && in_flags != out_flags)
12021 {
12022 /* Cannot mix APCS26 and APCS32 code. */
12023 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
12024 return FALSE;
12025
12026 /* Cannot mix float APCS and non-float APCS code. */
12027 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
12028 return FALSE;
12029
12030 /* If the src and dest have different interworking flags
12031 then turn off the interworking bit. */
12032 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
12033 {
12034 if (out_flags & EF_ARM_INTERWORK)
12035 _bfd_error_handler
12036 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
12037 obfd, ibfd);
12038
12039 in_flags &= ~EF_ARM_INTERWORK;
12040 }
12041
12042 /* Likewise for PIC, though don't warn for this case. */
12043 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
12044 in_flags &= ~EF_ARM_PIC;
12045 }
12046
12047 elf_elfheader (obfd)->e_flags = in_flags;
12048 elf_flags_init (obfd) = TRUE;
12049
12050 return _bfd_elf_copy_private_bfd_data (ibfd, obfd);
12051 }
12052
12053 /* Values for Tag_ABI_PCS_R9_use. */
12054 enum
12055 {
12056 AEABI_R9_V6,
12057 AEABI_R9_SB,
12058 AEABI_R9_TLS,
12059 AEABI_R9_unused
12060 };
12061
12062 /* Values for Tag_ABI_PCS_RW_data. */
12063 enum
12064 {
12065 AEABI_PCS_RW_data_absolute,
12066 AEABI_PCS_RW_data_PCrel,
12067 AEABI_PCS_RW_data_SBrel,
12068 AEABI_PCS_RW_data_unused
12069 };
12070
12071 /* Values for Tag_ABI_enum_size. */
12072 enum
12073 {
12074 AEABI_enum_unused,
12075 AEABI_enum_short,
12076 AEABI_enum_wide,
12077 AEABI_enum_forced_wide
12078 };
12079
12080 /* Determine whether an object attribute tag takes an integer, a
12081 string or both. */
12082
12083 static int
12084 elf32_arm_obj_attrs_arg_type (int tag)
12085 {
12086 if (tag == Tag_compatibility)
12087 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
12088 else if (tag == Tag_nodefaults)
12089 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_NO_DEFAULT;
12090 else if (tag == Tag_CPU_raw_name || tag == Tag_CPU_name)
12091 return ATTR_TYPE_FLAG_STR_VAL;
12092 else if (tag < 32)
12093 return ATTR_TYPE_FLAG_INT_VAL;
12094 else
12095 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
12096 }
12097
12098 /* The ABI defines that Tag_conformance should be emitted first, and that
12099 Tag_nodefaults should be second (if either is defined). This sets those
12100 two positions, and bumps up the position of all the remaining tags to
12101 compensate. */
12102 static int
12103 elf32_arm_obj_attrs_order (int num)
12104 {
12105 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE)
12106 return Tag_conformance;
12107 if (num == LEAST_KNOWN_OBJ_ATTRIBUTE + 1)
12108 return Tag_nodefaults;
12109 if ((num - 2) < Tag_nodefaults)
12110 return num - 2;
12111 if ((num - 1) < Tag_conformance)
12112 return num - 1;
12113 return num;
12114 }
12115
12116 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
12117 static bfd_boolean
12118 elf32_arm_obj_attrs_handle_unknown (bfd *abfd, int tag)
12119 {
12120 if ((tag & 127) < 64)
12121 {
12122 _bfd_error_handler
12123 (_("%B: Unknown mandatory EABI object attribute %d"),
12124 abfd, tag);
12125 bfd_set_error (bfd_error_bad_value);
12126 return FALSE;
12127 }
12128 else
12129 {
12130 _bfd_error_handler
12131 (_("Warning: %B: Unknown EABI object attribute %d"),
12132 abfd, tag);
12133 return TRUE;
12134 }
12135 }
12136
12137 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
12138 Returns -1 if no architecture could be read. */
12139
12140 static int
12141 get_secondary_compatible_arch (bfd *abfd)
12142 {
12143 obj_attribute *attr =
12144 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
12145
12146 /* Note: the tag and its argument below are uleb128 values, though
12147 currently-defined values fit in one byte for each. */
12148 if (attr->s
12149 && attr->s[0] == Tag_CPU_arch
12150 && (attr->s[1] & 128) != 128
12151 && attr->s[2] == 0)
12152 return attr->s[1];
12153
12154 /* This tag is "safely ignorable", so don't complain if it looks funny. */
12155 return -1;
12156 }
12157
12158 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
12159 The tag is removed if ARCH is -1. */
12160
12161 static void
12162 set_secondary_compatible_arch (bfd *abfd, int arch)
12163 {
12164 obj_attribute *attr =
12165 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
12166
12167 if (arch == -1)
12168 {
12169 attr->s = NULL;
12170 return;
12171 }
12172
12173 /* Note: the tag and its argument below are uleb128 values, though
12174 currently-defined values fit in one byte for each. */
12175 if (!attr->s)
12176 attr->s = (char *) bfd_alloc (abfd, 3);
12177 attr->s[0] = Tag_CPU_arch;
12178 attr->s[1] = arch;
12179 attr->s[2] = '\0';
12180 }
12181
12182 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
12183 into account. */
12184
12185 static int
12186 tag_cpu_arch_combine (bfd *ibfd, int oldtag, int *secondary_compat_out,
12187 int newtag, int secondary_compat)
12188 {
12189 #define T(X) TAG_CPU_ARCH_##X
12190 int tagl, tagh, result;
12191 const int v6t2[] =
12192 {
12193 T(V6T2), /* PRE_V4. */
12194 T(V6T2), /* V4. */
12195 T(V6T2), /* V4T. */
12196 T(V6T2), /* V5T. */
12197 T(V6T2), /* V5TE. */
12198 T(V6T2), /* V5TEJ. */
12199 T(V6T2), /* V6. */
12200 T(V7), /* V6KZ. */
12201 T(V6T2) /* V6T2. */
12202 };
12203 const int v6k[] =
12204 {
12205 T(V6K), /* PRE_V4. */
12206 T(V6K), /* V4. */
12207 T(V6K), /* V4T. */
12208 T(V6K), /* V5T. */
12209 T(V6K), /* V5TE. */
12210 T(V6K), /* V5TEJ. */
12211 T(V6K), /* V6. */
12212 T(V6KZ), /* V6KZ. */
12213 T(V7), /* V6T2. */
12214 T(V6K) /* V6K. */
12215 };
12216 const int v7[] =
12217 {
12218 T(V7), /* PRE_V4. */
12219 T(V7), /* V4. */
12220 T(V7), /* V4T. */
12221 T(V7), /* V5T. */
12222 T(V7), /* V5TE. */
12223 T(V7), /* V5TEJ. */
12224 T(V7), /* V6. */
12225 T(V7), /* V6KZ. */
12226 T(V7), /* V6T2. */
12227 T(V7), /* V6K. */
12228 T(V7) /* V7. */
12229 };
12230 const int v6_m[] =
12231 {
12232 -1, /* PRE_V4. */
12233 -1, /* V4. */
12234 T(V6K), /* V4T. */
12235 T(V6K), /* V5T. */
12236 T(V6K), /* V5TE. */
12237 T(V6K), /* V5TEJ. */
12238 T(V6K), /* V6. */
12239 T(V6KZ), /* V6KZ. */
12240 T(V7), /* V6T2. */
12241 T(V6K), /* V6K. */
12242 T(V7), /* V7. */
12243 T(V6_M) /* V6_M. */
12244 };
12245 const int v6s_m[] =
12246 {
12247 -1, /* PRE_V4. */
12248 -1, /* V4. */
12249 T(V6K), /* V4T. */
12250 T(V6K), /* V5T. */
12251 T(V6K), /* V5TE. */
12252 T(V6K), /* V5TEJ. */
12253 T(V6K), /* V6. */
12254 T(V6KZ), /* V6KZ. */
12255 T(V7), /* V6T2. */
12256 T(V6K), /* V6K. */
12257 T(V7), /* V7. */
12258 T(V6S_M), /* V6_M. */
12259 T(V6S_M) /* V6S_M. */
12260 };
12261 const int v7e_m[] =
12262 {
12263 -1, /* PRE_V4. */
12264 -1, /* V4. */
12265 T(V7E_M), /* V4T. */
12266 T(V7E_M), /* V5T. */
12267 T(V7E_M), /* V5TE. */
12268 T(V7E_M), /* V5TEJ. */
12269 T(V7E_M), /* V6. */
12270 T(V7E_M), /* V6KZ. */
12271 T(V7E_M), /* V6T2. */
12272 T(V7E_M), /* V6K. */
12273 T(V7E_M), /* V7. */
12274 T(V7E_M), /* V6_M. */
12275 T(V7E_M), /* V6S_M. */
12276 T(V7E_M) /* V7E_M. */
12277 };
12278 const int v8[] =
12279 {
12280 T(V8), /* PRE_V4. */
12281 T(V8), /* V4. */
12282 T(V8), /* V4T. */
12283 T(V8), /* V5T. */
12284 T(V8), /* V5TE. */
12285 T(V8), /* V5TEJ. */
12286 T(V8), /* V6. */
12287 T(V8), /* V6KZ. */
12288 T(V8), /* V6T2. */
12289 T(V8), /* V6K. */
12290 T(V8), /* V7. */
12291 T(V8), /* V6_M. */
12292 T(V8), /* V6S_M. */
12293 T(V8), /* V7E_M. */
12294 T(V8) /* V8. */
12295 };
12296 const int v8m_baseline[] =
12297 {
12298 -1, /* PRE_V4. */
12299 -1, /* V4. */
12300 -1, /* V4T. */
12301 -1, /* V5T. */
12302 -1, /* V5TE. */
12303 -1, /* V5TEJ. */
12304 -1, /* V6. */
12305 -1, /* V6KZ. */
12306 -1, /* V6T2. */
12307 -1, /* V6K. */
12308 -1, /* V7. */
12309 T(V8M_BASE), /* V6_M. */
12310 T(V8M_BASE), /* V6S_M. */
12311 -1, /* V7E_M. */
12312 -1, /* V8. */
12313 -1,
12314 T(V8M_BASE) /* V8-M BASELINE. */
12315 };
12316 const int v8m_mainline[] =
12317 {
12318 -1, /* PRE_V4. */
12319 -1, /* V4. */
12320 -1, /* V4T. */
12321 -1, /* V5T. */
12322 -1, /* V5TE. */
12323 -1, /* V5TEJ. */
12324 -1, /* V6. */
12325 -1, /* V6KZ. */
12326 -1, /* V6T2. */
12327 -1, /* V6K. */
12328 T(V8M_MAIN), /* V7. */
12329 T(V8M_MAIN), /* V6_M. */
12330 T(V8M_MAIN), /* V6S_M. */
12331 T(V8M_MAIN), /* V7E_M. */
12332 -1, /* V8. */
12333 -1,
12334 T(V8M_MAIN), /* V8-M BASELINE. */
12335 T(V8M_MAIN) /* V8-M MAINLINE. */
12336 };
12337 const int v4t_plus_v6_m[] =
12338 {
12339 -1, /* PRE_V4. */
12340 -1, /* V4. */
12341 T(V4T), /* V4T. */
12342 T(V5T), /* V5T. */
12343 T(V5TE), /* V5TE. */
12344 T(V5TEJ), /* V5TEJ. */
12345 T(V6), /* V6. */
12346 T(V6KZ), /* V6KZ. */
12347 T(V6T2), /* V6T2. */
12348 T(V6K), /* V6K. */
12349 T(V7), /* V7. */
12350 T(V6_M), /* V6_M. */
12351 T(V6S_M), /* V6S_M. */
12352 T(V7E_M), /* V7E_M. */
12353 T(V8), /* V8. */
12354 -1, /* Unused. */
12355 T(V8M_BASE), /* V8-M BASELINE. */
12356 T(V8M_MAIN), /* V8-M MAINLINE. */
12357 T(V4T_PLUS_V6_M) /* V4T plus V6_M. */
12358 };
12359 const int *comb[] =
12360 {
12361 v6t2,
12362 v6k,
12363 v7,
12364 v6_m,
12365 v6s_m,
12366 v7e_m,
12367 v8,
12368 NULL,
12369 v8m_baseline,
12370 v8m_mainline,
12371 /* Pseudo-architecture. */
12372 v4t_plus_v6_m
12373 };
12374
12375 /* Check we've not got a higher architecture than we know about. */
12376
12377 if (oldtag > MAX_TAG_CPU_ARCH || newtag > MAX_TAG_CPU_ARCH)
12378 {
12379 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd);
12380 return -1;
12381 }
12382
12383 /* Override old tag if we have a Tag_also_compatible_with on the output. */
12384
12385 if ((oldtag == T(V6_M) && *secondary_compat_out == T(V4T))
12386 || (oldtag == T(V4T) && *secondary_compat_out == T(V6_M)))
12387 oldtag = T(V4T_PLUS_V6_M);
12388
12389 /* And override the new tag if we have a Tag_also_compatible_with on the
12390 input. */
12391
12392 if ((newtag == T(V6_M) && secondary_compat == T(V4T))
12393 || (newtag == T(V4T) && secondary_compat == T(V6_M)))
12394 newtag = T(V4T_PLUS_V6_M);
12395
12396 tagl = (oldtag < newtag) ? oldtag : newtag;
12397 result = tagh = (oldtag > newtag) ? oldtag : newtag;
12398
12399 /* Architectures before V6KZ add features monotonically. */
12400 if (tagh <= TAG_CPU_ARCH_V6KZ)
12401 return result;
12402
12403 result = comb[tagh - T(V6T2)] ? comb[tagh - T(V6T2)][tagl] : -1;
12404
12405 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
12406 as the canonical version. */
12407 if (result == T(V4T_PLUS_V6_M))
12408 {
12409 result = T(V4T);
12410 *secondary_compat_out = T(V6_M);
12411 }
12412 else
12413 *secondary_compat_out = -1;
12414
12415 if (result == -1)
12416 {
12417 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
12418 ibfd, oldtag, newtag);
12419 return -1;
12420 }
12421
12422 return result;
12423 #undef T
12424 }
12425
12426 /* Query attributes object to see if integer divide instructions may be
12427 present in an object. */
12428 static bfd_boolean
12429 elf32_arm_attributes_accept_div (const obj_attribute *attr)
12430 {
12431 int arch = attr[Tag_CPU_arch].i;
12432 int profile = attr[Tag_CPU_arch_profile].i;
12433
12434 switch (attr[Tag_DIV_use].i)
12435 {
12436 case 0:
12437 /* Integer divide allowed if instruction contained in archetecture. */
12438 if (arch == TAG_CPU_ARCH_V7 && (profile == 'R' || profile == 'M'))
12439 return TRUE;
12440 else if (arch >= TAG_CPU_ARCH_V7E_M)
12441 return TRUE;
12442 else
12443 return FALSE;
12444
12445 case 1:
12446 /* Integer divide explicitly prohibited. */
12447 return FALSE;
12448
12449 default:
12450 /* Unrecognised case - treat as allowing divide everywhere. */
12451 case 2:
12452 /* Integer divide allowed in ARM state. */
12453 return TRUE;
12454 }
12455 }
12456
12457 /* Query attributes object to see if integer divide instructions are
12458 forbidden to be in the object. This is not the inverse of
12459 elf32_arm_attributes_accept_div. */
12460 static bfd_boolean
12461 elf32_arm_attributes_forbid_div (const obj_attribute *attr)
12462 {
12463 return attr[Tag_DIV_use].i == 1;
12464 }
12465
12466 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
12467 are conflicting attributes. */
12468
12469 static bfd_boolean
12470 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
12471 {
12472 obj_attribute *in_attr;
12473 obj_attribute *out_attr;
12474 /* Some tags have 0 = don't care, 1 = strong requirement,
12475 2 = weak requirement. */
12476 static const int order_021[3] = {0, 2, 1};
12477 int i;
12478 bfd_boolean result = TRUE;
12479 const char *sec_name = get_elf_backend_data (ibfd)->obj_attrs_section;
12480
12481 /* Skip the linker stubs file. This preserves previous behavior
12482 of accepting unknown attributes in the first input file - but
12483 is that a bug? */
12484 if (ibfd->flags & BFD_LINKER_CREATED)
12485 return TRUE;
12486
12487 /* Skip any input that hasn't attribute section.
12488 This enables to link object files without attribute section with
12489 any others. */
12490 if (bfd_get_section_by_name (ibfd, sec_name) == NULL)
12491 return TRUE;
12492
12493 if (!elf_known_obj_attributes_proc (obfd)[0].i)
12494 {
12495 /* This is the first object. Copy the attributes. */
12496 _bfd_elf_copy_obj_attributes (ibfd, obfd);
12497
12498 out_attr = elf_known_obj_attributes_proc (obfd);
12499
12500 /* Use the Tag_null value to indicate the attributes have been
12501 initialized. */
12502 out_attr[0].i = 1;
12503
12504 /* We do not output objects with Tag_MPextension_use_legacy - we move
12505 the attribute's value to Tag_MPextension_use. */
12506 if (out_attr[Tag_MPextension_use_legacy].i != 0)
12507 {
12508 if (out_attr[Tag_MPextension_use].i != 0
12509 && out_attr[Tag_MPextension_use_legacy].i
12510 != out_attr[Tag_MPextension_use].i)
12511 {
12512 _bfd_error_handler
12513 (_("Error: %B has both the current and legacy "
12514 "Tag_MPextension_use attributes"), ibfd);
12515 result = FALSE;
12516 }
12517
12518 out_attr[Tag_MPextension_use] =
12519 out_attr[Tag_MPextension_use_legacy];
12520 out_attr[Tag_MPextension_use_legacy].type = 0;
12521 out_attr[Tag_MPextension_use_legacy].i = 0;
12522 }
12523
12524 return result;
12525 }
12526
12527 in_attr = elf_known_obj_attributes_proc (ibfd);
12528 out_attr = elf_known_obj_attributes_proc (obfd);
12529 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
12530 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
12531 {
12532 /* Ignore mismatches if the object doesn't use floating point or is
12533 floating point ABI independent. */
12534 if (out_attr[Tag_ABI_FP_number_model].i == AEABI_FP_number_model_none
12535 || (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
12536 && out_attr[Tag_ABI_VFP_args].i == AEABI_VFP_args_compatible))
12537 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
12538 else if (in_attr[Tag_ABI_FP_number_model].i != AEABI_FP_number_model_none
12539 && in_attr[Tag_ABI_VFP_args].i != AEABI_VFP_args_compatible)
12540 {
12541 _bfd_error_handler
12542 (_("error: %B uses VFP register arguments, %B does not"),
12543 in_attr[Tag_ABI_VFP_args].i ? ibfd : obfd,
12544 in_attr[Tag_ABI_VFP_args].i ? obfd : ibfd);
12545 result = FALSE;
12546 }
12547 }
12548
12549 for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
12550 {
12551 /* Merge this attribute with existing attributes. */
12552 switch (i)
12553 {
12554 case Tag_CPU_raw_name:
12555 case Tag_CPU_name:
12556 /* These are merged after Tag_CPU_arch. */
12557 break;
12558
12559 case Tag_ABI_optimization_goals:
12560 case Tag_ABI_FP_optimization_goals:
12561 /* Use the first value seen. */
12562 break;
12563
12564 case Tag_CPU_arch:
12565 {
12566 int secondary_compat = -1, secondary_compat_out = -1;
12567 unsigned int saved_out_attr = out_attr[i].i;
12568 int arch_attr;
12569 static const char *name_table[] =
12570 {
12571 /* These aren't real CPU names, but we can't guess
12572 that from the architecture version alone. */
12573 "Pre v4",
12574 "ARM v4",
12575 "ARM v4T",
12576 "ARM v5T",
12577 "ARM v5TE",
12578 "ARM v5TEJ",
12579 "ARM v6",
12580 "ARM v6KZ",
12581 "ARM v6T2",
12582 "ARM v6K",
12583 "ARM v7",
12584 "ARM v6-M",
12585 "ARM v6S-M",
12586 "ARM v8",
12587 "",
12588 "ARM v8-M.baseline",
12589 "ARM v8-M.mainline",
12590 };
12591
12592 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
12593 secondary_compat = get_secondary_compatible_arch (ibfd);
12594 secondary_compat_out = get_secondary_compatible_arch (obfd);
12595 arch_attr = tag_cpu_arch_combine (ibfd, out_attr[i].i,
12596 &secondary_compat_out,
12597 in_attr[i].i,
12598 secondary_compat);
12599
12600 /* Return with error if failed to merge. */
12601 if (arch_attr == -1)
12602 return FALSE;
12603
12604 out_attr[i].i = arch_attr;
12605
12606 set_secondary_compatible_arch (obfd, secondary_compat_out);
12607
12608 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
12609 if (out_attr[i].i == saved_out_attr)
12610 ; /* Leave the names alone. */
12611 else if (out_attr[i].i == in_attr[i].i)
12612 {
12613 /* The output architecture has been changed to match the
12614 input architecture. Use the input names. */
12615 out_attr[Tag_CPU_name].s = in_attr[Tag_CPU_name].s
12616 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_name].s)
12617 : NULL;
12618 out_attr[Tag_CPU_raw_name].s = in_attr[Tag_CPU_raw_name].s
12619 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_raw_name].s)
12620 : NULL;
12621 }
12622 else
12623 {
12624 out_attr[Tag_CPU_name].s = NULL;
12625 out_attr[Tag_CPU_raw_name].s = NULL;
12626 }
12627
12628 /* If we still don't have a value for Tag_CPU_name,
12629 make one up now. Tag_CPU_raw_name remains blank. */
12630 if (out_attr[Tag_CPU_name].s == NULL
12631 && out_attr[i].i < ARRAY_SIZE (name_table))
12632 out_attr[Tag_CPU_name].s =
12633 _bfd_elf_attr_strdup (obfd, name_table[out_attr[i].i]);
12634 }
12635 break;
12636
12637 case Tag_ARM_ISA_use:
12638 case Tag_THUMB_ISA_use:
12639 case Tag_WMMX_arch:
12640 case Tag_Advanced_SIMD_arch:
12641 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
12642 case Tag_ABI_FP_rounding:
12643 case Tag_ABI_FP_exceptions:
12644 case Tag_ABI_FP_user_exceptions:
12645 case Tag_ABI_FP_number_model:
12646 case Tag_FP_HP_extension:
12647 case Tag_CPU_unaligned_access:
12648 case Tag_T2EE_use:
12649 case Tag_MPextension_use:
12650 /* Use the largest value specified. */
12651 if (in_attr[i].i > out_attr[i].i)
12652 out_attr[i].i = in_attr[i].i;
12653 break;
12654
12655 case Tag_ABI_align_preserved:
12656 case Tag_ABI_PCS_RO_data:
12657 /* Use the smallest value specified. */
12658 if (in_attr[i].i < out_attr[i].i)
12659 out_attr[i].i = in_attr[i].i;
12660 break;
12661
12662 case Tag_ABI_align_needed:
12663 if ((in_attr[i].i > 0 || out_attr[i].i > 0)
12664 && (in_attr[Tag_ABI_align_preserved].i == 0
12665 || out_attr[Tag_ABI_align_preserved].i == 0))
12666 {
12667 /* This error message should be enabled once all non-conformant
12668 binaries in the toolchain have had the attributes set
12669 properly.
12670 _bfd_error_handler
12671 (_("error: %B: 8-byte data alignment conflicts with %B"),
12672 obfd, ibfd);
12673 result = FALSE; */
12674 }
12675 /* Fall through. */
12676 case Tag_ABI_FP_denormal:
12677 case Tag_ABI_PCS_GOT_use:
12678 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
12679 value if greater than 2 (for future-proofing). */
12680 if ((in_attr[i].i > 2 && in_attr[i].i > out_attr[i].i)
12681 || (in_attr[i].i <= 2 && out_attr[i].i <= 2
12682 && order_021[in_attr[i].i] > order_021[out_attr[i].i]))
12683 out_attr[i].i = in_attr[i].i;
12684 break;
12685
12686 case Tag_Virtualization_use:
12687 /* The virtualization tag effectively stores two bits of
12688 information: the intended use of TrustZone (in bit 0), and the
12689 intended use of Virtualization (in bit 1). */
12690 if (out_attr[i].i == 0)
12691 out_attr[i].i = in_attr[i].i;
12692 else if (in_attr[i].i != 0
12693 && in_attr[i].i != out_attr[i].i)
12694 {
12695 if (in_attr[i].i <= 3 && out_attr[i].i <= 3)
12696 out_attr[i].i = 3;
12697 else
12698 {
12699 _bfd_error_handler
12700 (_("error: %B: unable to merge virtualization attributes "
12701 "with %B"),
12702 obfd, ibfd);
12703 result = FALSE;
12704 }
12705 }
12706 break;
12707
12708 case Tag_CPU_arch_profile:
12709 if (out_attr[i].i != in_attr[i].i)
12710 {
12711 /* 0 will merge with anything.
12712 'A' and 'S' merge to 'A'.
12713 'R' and 'S' merge to 'R'.
12714 'M' and 'A|R|S' is an error. */
12715 if (out_attr[i].i == 0
12716 || (out_attr[i].i == 'S'
12717 && (in_attr[i].i == 'A' || in_attr[i].i == 'R')))
12718 out_attr[i].i = in_attr[i].i;
12719 else if (in_attr[i].i == 0
12720 || (in_attr[i].i == 'S'
12721 && (out_attr[i].i == 'A' || out_attr[i].i == 'R')))
12722 ; /* Do nothing. */
12723 else
12724 {
12725 _bfd_error_handler
12726 (_("error: %B: Conflicting architecture profiles %c/%c"),
12727 ibfd,
12728 in_attr[i].i ? in_attr[i].i : '0',
12729 out_attr[i].i ? out_attr[i].i : '0');
12730 result = FALSE;
12731 }
12732 }
12733 break;
12734 case Tag_FP_arch:
12735 {
12736 /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since
12737 the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch
12738 when it's 0. It might mean absence of FP hardware if
12739 Tag_FP_arch is zero. */
12740
12741 #define VFP_VERSION_COUNT 9
12742 static const struct
12743 {
12744 int ver;
12745 int regs;
12746 } vfp_versions[VFP_VERSION_COUNT] =
12747 {
12748 {0, 0},
12749 {1, 16},
12750 {2, 16},
12751 {3, 32},
12752 {3, 16},
12753 {4, 32},
12754 {4, 16},
12755 {8, 32},
12756 {8, 16}
12757 };
12758 int ver;
12759 int regs;
12760 int newval;
12761
12762 /* If the output has no requirement about FP hardware,
12763 follow the requirement of the input. */
12764 if (out_attr[i].i == 0)
12765 {
12766 BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0);
12767 out_attr[i].i = in_attr[i].i;
12768 out_attr[Tag_ABI_HardFP_use].i
12769 = in_attr[Tag_ABI_HardFP_use].i;
12770 break;
12771 }
12772 /* If the input has no requirement about FP hardware, do
12773 nothing. */
12774 else if (in_attr[i].i == 0)
12775 {
12776 BFD_ASSERT (in_attr[Tag_ABI_HardFP_use].i == 0);
12777 break;
12778 }
12779
12780 /* Both the input and the output have nonzero Tag_FP_arch.
12781 So Tag_ABI_HardFP_use is implied by Tag_FP_arch when it's zero. */
12782
12783 /* If both the input and the output have zero Tag_ABI_HardFP_use,
12784 do nothing. */
12785 if (in_attr[Tag_ABI_HardFP_use].i == 0
12786 && out_attr[Tag_ABI_HardFP_use].i == 0)
12787 ;
12788 /* If the input and the output have different Tag_ABI_HardFP_use,
12789 the combination of them is 0 (implied by Tag_FP_arch). */
12790 else if (in_attr[Tag_ABI_HardFP_use].i
12791 != out_attr[Tag_ABI_HardFP_use].i)
12792 out_attr[Tag_ABI_HardFP_use].i = 0;
12793
12794 /* Now we can handle Tag_FP_arch. */
12795
12796 /* Values of VFP_VERSION_COUNT or more aren't defined, so just
12797 pick the biggest. */
12798 if (in_attr[i].i >= VFP_VERSION_COUNT
12799 && in_attr[i].i > out_attr[i].i)
12800 {
12801 out_attr[i] = in_attr[i];
12802 break;
12803 }
12804 /* The output uses the superset of input features
12805 (ISA version) and registers. */
12806 ver = vfp_versions[in_attr[i].i].ver;
12807 if (ver < vfp_versions[out_attr[i].i].ver)
12808 ver = vfp_versions[out_attr[i].i].ver;
12809 regs = vfp_versions[in_attr[i].i].regs;
12810 if (regs < vfp_versions[out_attr[i].i].regs)
12811 regs = vfp_versions[out_attr[i].i].regs;
12812 /* This assumes all possible supersets are also a valid
12813 options. */
12814 for (newval = VFP_VERSION_COUNT - 1; newval > 0; newval--)
12815 {
12816 if (regs == vfp_versions[newval].regs
12817 && ver == vfp_versions[newval].ver)
12818 break;
12819 }
12820 out_attr[i].i = newval;
12821 }
12822 break;
12823 case Tag_PCS_config:
12824 if (out_attr[i].i == 0)
12825 out_attr[i].i = in_attr[i].i;
12826 else if (in_attr[i].i != 0 && out_attr[i].i != in_attr[i].i)
12827 {
12828 /* It's sometimes ok to mix different configs, so this is only
12829 a warning. */
12830 _bfd_error_handler
12831 (_("Warning: %B: Conflicting platform configuration"), ibfd);
12832 }
12833 break;
12834 case Tag_ABI_PCS_R9_use:
12835 if (in_attr[i].i != out_attr[i].i
12836 && out_attr[i].i != AEABI_R9_unused
12837 && in_attr[i].i != AEABI_R9_unused)
12838 {
12839 _bfd_error_handler
12840 (_("error: %B: Conflicting use of R9"), ibfd);
12841 result = FALSE;
12842 }
12843 if (out_attr[i].i == AEABI_R9_unused)
12844 out_attr[i].i = in_attr[i].i;
12845 break;
12846 case Tag_ABI_PCS_RW_data:
12847 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
12848 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
12849 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
12850 {
12851 _bfd_error_handler
12852 (_("error: %B: SB relative addressing conflicts with use of R9"),
12853 ibfd);
12854 result = FALSE;
12855 }
12856 /* Use the smallest value specified. */
12857 if (in_attr[i].i < out_attr[i].i)
12858 out_attr[i].i = in_attr[i].i;
12859 break;
12860 case Tag_ABI_PCS_wchar_t:
12861 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
12862 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
12863 {
12864 _bfd_error_handler
12865 (_("warning: %B uses %u-byte wchar_t yet the output is to use %u-byte wchar_t; use of wchar_t values across objects may fail"),
12866 ibfd, in_attr[i].i, out_attr[i].i);
12867 }
12868 else if (in_attr[i].i && !out_attr[i].i)
12869 out_attr[i].i = in_attr[i].i;
12870 break;
12871 case Tag_ABI_enum_size:
12872 if (in_attr[i].i != AEABI_enum_unused)
12873 {
12874 if (out_attr[i].i == AEABI_enum_unused
12875 || out_attr[i].i == AEABI_enum_forced_wide)
12876 {
12877 /* The existing object is compatible with anything.
12878 Use whatever requirements the new object has. */
12879 out_attr[i].i = in_attr[i].i;
12880 }
12881 else if (in_attr[i].i != AEABI_enum_forced_wide
12882 && out_attr[i].i != in_attr[i].i
12883 && !elf_arm_tdata (obfd)->no_enum_size_warning)
12884 {
12885 static const char *aeabi_enum_names[] =
12886 { "", "variable-size", "32-bit", "" };
12887 const char *in_name =
12888 in_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
12889 ? aeabi_enum_names[in_attr[i].i]
12890 : "<unknown>";
12891 const char *out_name =
12892 out_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
12893 ? aeabi_enum_names[out_attr[i].i]
12894 : "<unknown>";
12895 _bfd_error_handler
12896 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
12897 ibfd, in_name, out_name);
12898 }
12899 }
12900 break;
12901 case Tag_ABI_VFP_args:
12902 /* Aready done. */
12903 break;
12904 case Tag_ABI_WMMX_args:
12905 if (in_attr[i].i != out_attr[i].i)
12906 {
12907 _bfd_error_handler
12908 (_("error: %B uses iWMMXt register arguments, %B does not"),
12909 ibfd, obfd);
12910 result = FALSE;
12911 }
12912 break;
12913 case Tag_compatibility:
12914 /* Merged in target-independent code. */
12915 break;
12916 case Tag_ABI_HardFP_use:
12917 /* This is handled along with Tag_FP_arch. */
12918 break;
12919 case Tag_ABI_FP_16bit_format:
12920 if (in_attr[i].i != 0 && out_attr[i].i != 0)
12921 {
12922 if (in_attr[i].i != out_attr[i].i)
12923 {
12924 _bfd_error_handler
12925 (_("error: fp16 format mismatch between %B and %B"),
12926 ibfd, obfd);
12927 result = FALSE;
12928 }
12929 }
12930 if (in_attr[i].i != 0)
12931 out_attr[i].i = in_attr[i].i;
12932 break;
12933
12934 case Tag_DIV_use:
12935 /* A value of zero on input means that the divide instruction may
12936 be used if available in the base architecture as specified via
12937 Tag_CPU_arch and Tag_CPU_arch_profile. A value of 1 means that
12938 the user did not want divide instructions. A value of 2
12939 explicitly means that divide instructions were allowed in ARM
12940 and Thumb state. */
12941 if (in_attr[i].i == out_attr[i].i)
12942 /* Do nothing. */ ;
12943 else if (elf32_arm_attributes_forbid_div (in_attr)
12944 && !elf32_arm_attributes_accept_div (out_attr))
12945 out_attr[i].i = 1;
12946 else if (elf32_arm_attributes_forbid_div (out_attr)
12947 && elf32_arm_attributes_accept_div (in_attr))
12948 out_attr[i].i = in_attr[i].i;
12949 else if (in_attr[i].i == 2)
12950 out_attr[i].i = in_attr[i].i;
12951 break;
12952
12953 case Tag_MPextension_use_legacy:
12954 /* We don't output objects with Tag_MPextension_use_legacy - we
12955 move the value to Tag_MPextension_use. */
12956 if (in_attr[i].i != 0 && in_attr[Tag_MPextension_use].i != 0)
12957 {
12958 if (in_attr[Tag_MPextension_use].i != in_attr[i].i)
12959 {
12960 _bfd_error_handler
12961 (_("%B has has both the current and legacy "
12962 "Tag_MPextension_use attributes"),
12963 ibfd);
12964 result = FALSE;
12965 }
12966 }
12967
12968 if (in_attr[i].i > out_attr[Tag_MPextension_use].i)
12969 out_attr[Tag_MPextension_use] = in_attr[i];
12970
12971 break;
12972
12973 case Tag_nodefaults:
12974 /* This tag is set if it exists, but the value is unused (and is
12975 typically zero). We don't actually need to do anything here -
12976 the merge happens automatically when the type flags are merged
12977 below. */
12978 break;
12979 case Tag_also_compatible_with:
12980 /* Already done in Tag_CPU_arch. */
12981 break;
12982 case Tag_conformance:
12983 /* Keep the attribute if it matches. Throw it away otherwise.
12984 No attribute means no claim to conform. */
12985 if (!in_attr[i].s || !out_attr[i].s
12986 || strcmp (in_attr[i].s, out_attr[i].s) != 0)
12987 out_attr[i].s = NULL;
12988 break;
12989
12990 default:
12991 result
12992 = result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i);
12993 }
12994
12995 /* If out_attr was copied from in_attr then it won't have a type yet. */
12996 if (in_attr[i].type && !out_attr[i].type)
12997 out_attr[i].type = in_attr[i].type;
12998 }
12999
13000 /* Merge Tag_compatibility attributes and any common GNU ones. */
13001 if (!_bfd_elf_merge_object_attributes (ibfd, obfd))
13002 return FALSE;
13003
13004 /* Check for any attributes not known on ARM. */
13005 result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd);
13006
13007 return result;
13008 }
13009
13010
13011 /* Return TRUE if the two EABI versions are incompatible. */
13012
13013 static bfd_boolean
13014 elf32_arm_versions_compatible (unsigned iver, unsigned over)
13015 {
13016 /* v4 and v5 are the same spec before and after it was released,
13017 so allow mixing them. */
13018 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
13019 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
13020 return TRUE;
13021
13022 return (iver == over);
13023 }
13024
13025 /* Merge backend specific data from an object file to the output
13026 object file when linking. */
13027
13028 static bfd_boolean
13029 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd);
13030
13031 /* Display the flags field. */
13032
13033 static bfd_boolean
13034 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
13035 {
13036 FILE * file = (FILE *) ptr;
13037 unsigned long flags;
13038
13039 BFD_ASSERT (abfd != NULL && ptr != NULL);
13040
13041 /* Print normal ELF private data. */
13042 _bfd_elf_print_private_bfd_data (abfd, ptr);
13043
13044 flags = elf_elfheader (abfd)->e_flags;
13045 /* Ignore init flag - it may not be set, despite the flags field
13046 containing valid data. */
13047
13048 /* xgettext:c-format */
13049 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
13050
13051 switch (EF_ARM_EABI_VERSION (flags))
13052 {
13053 case EF_ARM_EABI_UNKNOWN:
13054 /* The following flag bits are GNU extensions and not part of the
13055 official ARM ELF extended ABI. Hence they are only decoded if
13056 the EABI version is not set. */
13057 if (flags & EF_ARM_INTERWORK)
13058 fprintf (file, _(" [interworking enabled]"));
13059
13060 if (flags & EF_ARM_APCS_26)
13061 fprintf (file, " [APCS-26]");
13062 else
13063 fprintf (file, " [APCS-32]");
13064
13065 if (flags & EF_ARM_VFP_FLOAT)
13066 fprintf (file, _(" [VFP float format]"));
13067 else if (flags & EF_ARM_MAVERICK_FLOAT)
13068 fprintf (file, _(" [Maverick float format]"));
13069 else
13070 fprintf (file, _(" [FPA float format]"));
13071
13072 if (flags & EF_ARM_APCS_FLOAT)
13073 fprintf (file, _(" [floats passed in float registers]"));
13074
13075 if (flags & EF_ARM_PIC)
13076 fprintf (file, _(" [position independent]"));
13077
13078 if (flags & EF_ARM_NEW_ABI)
13079 fprintf (file, _(" [new ABI]"));
13080
13081 if (flags & EF_ARM_OLD_ABI)
13082 fprintf (file, _(" [old ABI]"));
13083
13084 if (flags & EF_ARM_SOFT_FLOAT)
13085 fprintf (file, _(" [software FP]"));
13086
13087 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
13088 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
13089 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
13090 | EF_ARM_MAVERICK_FLOAT);
13091 break;
13092
13093 case EF_ARM_EABI_VER1:
13094 fprintf (file, _(" [Version1 EABI]"));
13095
13096 if (flags & EF_ARM_SYMSARESORTED)
13097 fprintf (file, _(" [sorted symbol table]"));
13098 else
13099 fprintf (file, _(" [unsorted symbol table]"));
13100
13101 flags &= ~ EF_ARM_SYMSARESORTED;
13102 break;
13103
13104 case EF_ARM_EABI_VER2:
13105 fprintf (file, _(" [Version2 EABI]"));
13106
13107 if (flags & EF_ARM_SYMSARESORTED)
13108 fprintf (file, _(" [sorted symbol table]"));
13109 else
13110 fprintf (file, _(" [unsorted symbol table]"));
13111
13112 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
13113 fprintf (file, _(" [dynamic symbols use segment index]"));
13114
13115 if (flags & EF_ARM_MAPSYMSFIRST)
13116 fprintf (file, _(" [mapping symbols precede others]"));
13117
13118 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
13119 | EF_ARM_MAPSYMSFIRST);
13120 break;
13121
13122 case EF_ARM_EABI_VER3:
13123 fprintf (file, _(" [Version3 EABI]"));
13124 break;
13125
13126 case EF_ARM_EABI_VER4:
13127 fprintf (file, _(" [Version4 EABI]"));
13128 goto eabi;
13129
13130 case EF_ARM_EABI_VER5:
13131 fprintf (file, _(" [Version5 EABI]"));
13132
13133 if (flags & EF_ARM_ABI_FLOAT_SOFT)
13134 fprintf (file, _(" [soft-float ABI]"));
13135
13136 if (flags & EF_ARM_ABI_FLOAT_HARD)
13137 fprintf (file, _(" [hard-float ABI]"));
13138
13139 flags &= ~(EF_ARM_ABI_FLOAT_SOFT | EF_ARM_ABI_FLOAT_HARD);
13140
13141 eabi:
13142 if (flags & EF_ARM_BE8)
13143 fprintf (file, _(" [BE8]"));
13144
13145 if (flags & EF_ARM_LE8)
13146 fprintf (file, _(" [LE8]"));
13147
13148 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
13149 break;
13150
13151 default:
13152 fprintf (file, _(" <EABI version unrecognised>"));
13153 break;
13154 }
13155
13156 flags &= ~ EF_ARM_EABIMASK;
13157
13158 if (flags & EF_ARM_RELEXEC)
13159 fprintf (file, _(" [relocatable executable]"));
13160
13161 flags &= ~EF_ARM_RELEXEC;
13162
13163 if (flags)
13164 fprintf (file, _("<Unrecognised flag bits set>"));
13165
13166 fputc ('\n', file);
13167
13168 return TRUE;
13169 }
13170
13171 static int
13172 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
13173 {
13174 switch (ELF_ST_TYPE (elf_sym->st_info))
13175 {
13176 case STT_ARM_TFUNC:
13177 return ELF_ST_TYPE (elf_sym->st_info);
13178
13179 case STT_ARM_16BIT:
13180 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
13181 This allows us to distinguish between data used by Thumb instructions
13182 and non-data (which is probably code) inside Thumb regions of an
13183 executable. */
13184 if (type != STT_OBJECT && type != STT_TLS)
13185 return ELF_ST_TYPE (elf_sym->st_info);
13186 break;
13187
13188 default:
13189 break;
13190 }
13191
13192 return type;
13193 }
13194
13195 static asection *
13196 elf32_arm_gc_mark_hook (asection *sec,
13197 struct bfd_link_info *info,
13198 Elf_Internal_Rela *rel,
13199 struct elf_link_hash_entry *h,
13200 Elf_Internal_Sym *sym)
13201 {
13202 if (h != NULL)
13203 switch (ELF32_R_TYPE (rel->r_info))
13204 {
13205 case R_ARM_GNU_VTINHERIT:
13206 case R_ARM_GNU_VTENTRY:
13207 return NULL;
13208 }
13209
13210 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
13211 }
13212
13213 /* Update the got entry reference counts for the section being removed. */
13214
13215 static bfd_boolean
13216 elf32_arm_gc_sweep_hook (bfd * abfd,
13217 struct bfd_link_info * info,
13218 asection * sec,
13219 const Elf_Internal_Rela * relocs)
13220 {
13221 Elf_Internal_Shdr *symtab_hdr;
13222 struct elf_link_hash_entry **sym_hashes;
13223 bfd_signed_vma *local_got_refcounts;
13224 const Elf_Internal_Rela *rel, *relend;
13225 struct elf32_arm_link_hash_table * globals;
13226
13227 if (bfd_link_relocatable (info))
13228 return TRUE;
13229
13230 globals = elf32_arm_hash_table (info);
13231 if (globals == NULL)
13232 return FALSE;
13233
13234 elf_section_data (sec)->local_dynrel = NULL;
13235
13236 symtab_hdr = & elf_symtab_hdr (abfd);
13237 sym_hashes = elf_sym_hashes (abfd);
13238 local_got_refcounts = elf_local_got_refcounts (abfd);
13239
13240 check_use_blx (globals);
13241
13242 relend = relocs + sec->reloc_count;
13243 for (rel = relocs; rel < relend; rel++)
13244 {
13245 unsigned long r_symndx;
13246 struct elf_link_hash_entry *h = NULL;
13247 struct elf32_arm_link_hash_entry *eh;
13248 int r_type;
13249 bfd_boolean call_reloc_p;
13250 bfd_boolean may_become_dynamic_p;
13251 bfd_boolean may_need_local_target_p;
13252 union gotplt_union *root_plt;
13253 struct arm_plt_info *arm_plt;
13254
13255 r_symndx = ELF32_R_SYM (rel->r_info);
13256 if (r_symndx >= symtab_hdr->sh_info)
13257 {
13258 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
13259 while (h->root.type == bfd_link_hash_indirect
13260 || h->root.type == bfd_link_hash_warning)
13261 h = (struct elf_link_hash_entry *) h->root.u.i.link;
13262 }
13263 eh = (struct elf32_arm_link_hash_entry *) h;
13264
13265 call_reloc_p = FALSE;
13266 may_become_dynamic_p = FALSE;
13267 may_need_local_target_p = FALSE;
13268
13269 r_type = ELF32_R_TYPE (rel->r_info);
13270 r_type = arm_real_reloc_type (globals, r_type);
13271 switch (r_type)
13272 {
13273 case R_ARM_GOT32:
13274 case R_ARM_GOT_PREL:
13275 case R_ARM_TLS_GD32:
13276 case R_ARM_TLS_IE32:
13277 if (h != NULL)
13278 {
13279 if (h->got.refcount > 0)
13280 h->got.refcount -= 1;
13281 }
13282 else if (local_got_refcounts != NULL)
13283 {
13284 if (local_got_refcounts[r_symndx] > 0)
13285 local_got_refcounts[r_symndx] -= 1;
13286 }
13287 break;
13288
13289 case R_ARM_TLS_LDM32:
13290 globals->tls_ldm_got.refcount -= 1;
13291 break;
13292
13293 case R_ARM_PC24:
13294 case R_ARM_PLT32:
13295 case R_ARM_CALL:
13296 case R_ARM_JUMP24:
13297 case R_ARM_PREL31:
13298 case R_ARM_THM_CALL:
13299 case R_ARM_THM_JUMP24:
13300 case R_ARM_THM_JUMP19:
13301 call_reloc_p = TRUE;
13302 may_need_local_target_p = TRUE;
13303 break;
13304
13305 case R_ARM_ABS12:
13306 if (!globals->vxworks_p)
13307 {
13308 may_need_local_target_p = TRUE;
13309 break;
13310 }
13311 /* Fall through. */
13312 case R_ARM_ABS32:
13313 case R_ARM_ABS32_NOI:
13314 case R_ARM_REL32:
13315 case R_ARM_REL32_NOI:
13316 case R_ARM_MOVW_ABS_NC:
13317 case R_ARM_MOVT_ABS:
13318 case R_ARM_MOVW_PREL_NC:
13319 case R_ARM_MOVT_PREL:
13320 case R_ARM_THM_MOVW_ABS_NC:
13321 case R_ARM_THM_MOVT_ABS:
13322 case R_ARM_THM_MOVW_PREL_NC:
13323 case R_ARM_THM_MOVT_PREL:
13324 /* Should the interworking branches be here also? */
13325 if ((bfd_link_pic (info) || globals->root.is_relocatable_executable)
13326 && (sec->flags & SEC_ALLOC) != 0)
13327 {
13328 if (h == NULL
13329 && elf32_arm_howto_from_type (r_type)->pc_relative)
13330 {
13331 call_reloc_p = TRUE;
13332 may_need_local_target_p = TRUE;
13333 }
13334 else
13335 may_become_dynamic_p = TRUE;
13336 }
13337 else
13338 may_need_local_target_p = TRUE;
13339 break;
13340
13341 default:
13342 break;
13343 }
13344
13345 if (may_need_local_target_p
13346 && elf32_arm_get_plt_info (abfd, eh, r_symndx, &root_plt, &arm_plt))
13347 {
13348 /* If PLT refcount book-keeping is wrong and too low, we'll
13349 see a zero value (going to -1) for the root PLT reference
13350 count. */
13351 if (root_plt->refcount >= 0)
13352 {
13353 BFD_ASSERT (root_plt->refcount != 0);
13354 root_plt->refcount -= 1;
13355 }
13356 else
13357 /* A value of -1 means the symbol has become local, forced
13358 or seeing a hidden definition. Any other negative value
13359 is an error. */
13360 BFD_ASSERT (root_plt->refcount == -1);
13361
13362 if (!call_reloc_p)
13363 arm_plt->noncall_refcount--;
13364
13365 if (r_type == R_ARM_THM_CALL)
13366 arm_plt->maybe_thumb_refcount--;
13367
13368 if (r_type == R_ARM_THM_JUMP24
13369 || r_type == R_ARM_THM_JUMP19)
13370 arm_plt->thumb_refcount--;
13371 }
13372
13373 if (may_become_dynamic_p)
13374 {
13375 struct elf_dyn_relocs **pp;
13376 struct elf_dyn_relocs *p;
13377
13378 if (h != NULL)
13379 pp = &(eh->dyn_relocs);
13380 else
13381 {
13382 Elf_Internal_Sym *isym;
13383
13384 isym = bfd_sym_from_r_symndx (&globals->sym_cache,
13385 abfd, r_symndx);
13386 if (isym == NULL)
13387 return FALSE;
13388 pp = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym);
13389 if (pp == NULL)
13390 return FALSE;
13391 }
13392 for (; (p = *pp) != NULL; pp = &p->next)
13393 if (p->sec == sec)
13394 {
13395 /* Everything must go for SEC. */
13396 *pp = p->next;
13397 break;
13398 }
13399 }
13400 }
13401
13402 return TRUE;
13403 }
13404
13405 /* Look through the relocs for a section during the first phase. */
13406
13407 static bfd_boolean
13408 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
13409 asection *sec, const Elf_Internal_Rela *relocs)
13410 {
13411 Elf_Internal_Shdr *symtab_hdr;
13412 struct elf_link_hash_entry **sym_hashes;
13413 const Elf_Internal_Rela *rel;
13414 const Elf_Internal_Rela *rel_end;
13415 bfd *dynobj;
13416 asection *sreloc;
13417 struct elf32_arm_link_hash_table *htab;
13418 bfd_boolean call_reloc_p;
13419 bfd_boolean may_become_dynamic_p;
13420 bfd_boolean may_need_local_target_p;
13421 unsigned long nsyms;
13422
13423 if (bfd_link_relocatable (info))
13424 return TRUE;
13425
13426 BFD_ASSERT (is_arm_elf (abfd));
13427
13428 htab = elf32_arm_hash_table (info);
13429 if (htab == NULL)
13430 return FALSE;
13431
13432 sreloc = NULL;
13433
13434 /* Create dynamic sections for relocatable executables so that we can
13435 copy relocations. */
13436 if (htab->root.is_relocatable_executable
13437 && ! htab->root.dynamic_sections_created)
13438 {
13439 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
13440 return FALSE;
13441 }
13442
13443 if (htab->root.dynobj == NULL)
13444 htab->root.dynobj = abfd;
13445 if (!create_ifunc_sections (info))
13446 return FALSE;
13447
13448 dynobj = htab->root.dynobj;
13449
13450 symtab_hdr = & elf_symtab_hdr (abfd);
13451 sym_hashes = elf_sym_hashes (abfd);
13452 nsyms = NUM_SHDR_ENTRIES (symtab_hdr);
13453
13454 rel_end = relocs + sec->reloc_count;
13455 for (rel = relocs; rel < rel_end; rel++)
13456 {
13457 Elf_Internal_Sym *isym;
13458 struct elf_link_hash_entry *h;
13459 struct elf32_arm_link_hash_entry *eh;
13460 unsigned long r_symndx;
13461 int r_type;
13462
13463 r_symndx = ELF32_R_SYM (rel->r_info);
13464 r_type = ELF32_R_TYPE (rel->r_info);
13465 r_type = arm_real_reloc_type (htab, r_type);
13466
13467 if (r_symndx >= nsyms
13468 /* PR 9934: It is possible to have relocations that do not
13469 refer to symbols, thus it is also possible to have an
13470 object file containing relocations but no symbol table. */
13471 && (r_symndx > STN_UNDEF || nsyms > 0))
13472 {
13473 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
13474 r_symndx);
13475 return FALSE;
13476 }
13477
13478 h = NULL;
13479 isym = NULL;
13480 if (nsyms > 0)
13481 {
13482 if (r_symndx < symtab_hdr->sh_info)
13483 {
13484 /* A local symbol. */
13485 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
13486 abfd, r_symndx);
13487 if (isym == NULL)
13488 return FALSE;
13489 }
13490 else
13491 {
13492 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
13493 while (h->root.type == bfd_link_hash_indirect
13494 || h->root.type == bfd_link_hash_warning)
13495 h = (struct elf_link_hash_entry *) h->root.u.i.link;
13496
13497 /* PR15323, ref flags aren't set for references in the
13498 same object. */
13499 h->root.non_ir_ref = 1;
13500 }
13501 }
13502
13503 eh = (struct elf32_arm_link_hash_entry *) h;
13504
13505 call_reloc_p = FALSE;
13506 may_become_dynamic_p = FALSE;
13507 may_need_local_target_p = FALSE;
13508
13509 /* Could be done earlier, if h were already available. */
13510 r_type = elf32_arm_tls_transition (info, r_type, h);
13511 switch (r_type)
13512 {
13513 case R_ARM_GOT32:
13514 case R_ARM_GOT_PREL:
13515 case R_ARM_TLS_GD32:
13516 case R_ARM_TLS_IE32:
13517 case R_ARM_TLS_GOTDESC:
13518 case R_ARM_TLS_DESCSEQ:
13519 case R_ARM_THM_TLS_DESCSEQ:
13520 case R_ARM_TLS_CALL:
13521 case R_ARM_THM_TLS_CALL:
13522 /* This symbol requires a global offset table entry. */
13523 {
13524 int tls_type, old_tls_type;
13525
13526 switch (r_type)
13527 {
13528 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
13529
13530 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
13531
13532 case R_ARM_TLS_GOTDESC:
13533 case R_ARM_TLS_CALL: case R_ARM_THM_TLS_CALL:
13534 case R_ARM_TLS_DESCSEQ: case R_ARM_THM_TLS_DESCSEQ:
13535 tls_type = GOT_TLS_GDESC; break;
13536
13537 default: tls_type = GOT_NORMAL; break;
13538 }
13539
13540 if (!bfd_link_executable (info) && (tls_type & GOT_TLS_IE))
13541 info->flags |= DF_STATIC_TLS;
13542
13543 if (h != NULL)
13544 {
13545 h->got.refcount++;
13546 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
13547 }
13548 else
13549 {
13550 /* This is a global offset table entry for a local symbol. */
13551 if (!elf32_arm_allocate_local_sym_info (abfd))
13552 return FALSE;
13553 elf_local_got_refcounts (abfd)[r_symndx] += 1;
13554 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
13555 }
13556
13557 /* If a variable is accessed with both tls methods, two
13558 slots may be created. */
13559 if (GOT_TLS_GD_ANY_P (old_tls_type)
13560 && GOT_TLS_GD_ANY_P (tls_type))
13561 tls_type |= old_tls_type;
13562
13563 /* We will already have issued an error message if there
13564 is a TLS/non-TLS mismatch, based on the symbol
13565 type. So just combine any TLS types needed. */
13566 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
13567 && tls_type != GOT_NORMAL)
13568 tls_type |= old_tls_type;
13569
13570 /* If the symbol is accessed in both IE and GDESC
13571 method, we're able to relax. Turn off the GDESC flag,
13572 without messing up with any other kind of tls types
13573 that may be involved. */
13574 if ((tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GDESC))
13575 tls_type &= ~GOT_TLS_GDESC;
13576
13577 if (old_tls_type != tls_type)
13578 {
13579 if (h != NULL)
13580 elf32_arm_hash_entry (h)->tls_type = tls_type;
13581 else
13582 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
13583 }
13584 }
13585 /* Fall through. */
13586
13587 case R_ARM_TLS_LDM32:
13588 if (r_type == R_ARM_TLS_LDM32)
13589 htab->tls_ldm_got.refcount++;
13590 /* Fall through. */
13591
13592 case R_ARM_GOTOFF32:
13593 case R_ARM_GOTPC:
13594 if (htab->root.sgot == NULL
13595 && !create_got_section (htab->root.dynobj, info))
13596 return FALSE;
13597 break;
13598
13599 case R_ARM_PC24:
13600 case R_ARM_PLT32:
13601 case R_ARM_CALL:
13602 case R_ARM_JUMP24:
13603 case R_ARM_PREL31:
13604 case R_ARM_THM_CALL:
13605 case R_ARM_THM_JUMP24:
13606 case R_ARM_THM_JUMP19:
13607 call_reloc_p = TRUE;
13608 may_need_local_target_p = TRUE;
13609 break;
13610
13611 case R_ARM_ABS12:
13612 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
13613 ldr __GOTT_INDEX__ offsets. */
13614 if (!htab->vxworks_p)
13615 {
13616 may_need_local_target_p = TRUE;
13617 break;
13618 }
13619 else goto jump_over;
13620
13621 /* Fall through. */
13622
13623 case R_ARM_MOVW_ABS_NC:
13624 case R_ARM_MOVT_ABS:
13625 case R_ARM_THM_MOVW_ABS_NC:
13626 case R_ARM_THM_MOVT_ABS:
13627 if (bfd_link_pic (info))
13628 {
13629 (*_bfd_error_handler)
13630 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
13631 abfd, elf32_arm_howto_table_1[r_type].name,
13632 (h) ? h->root.root.string : "a local symbol");
13633 bfd_set_error (bfd_error_bad_value);
13634 return FALSE;
13635 }
13636
13637 /* Fall through. */
13638 case R_ARM_ABS32:
13639 case R_ARM_ABS32_NOI:
13640 jump_over:
13641 if (h != NULL && bfd_link_executable (info))
13642 {
13643 h->pointer_equality_needed = 1;
13644 }
13645 /* Fall through. */
13646 case R_ARM_REL32:
13647 case R_ARM_REL32_NOI:
13648 case R_ARM_MOVW_PREL_NC:
13649 case R_ARM_MOVT_PREL:
13650 case R_ARM_THM_MOVW_PREL_NC:
13651 case R_ARM_THM_MOVT_PREL:
13652
13653 /* Should the interworking branches be listed here? */
13654 if ((bfd_link_pic (info) || htab->root.is_relocatable_executable)
13655 && (sec->flags & SEC_ALLOC) != 0)
13656 {
13657 if (h == NULL
13658 && elf32_arm_howto_from_type (r_type)->pc_relative)
13659 {
13660 /* In shared libraries and relocatable executables,
13661 we treat local relative references as calls;
13662 see the related SYMBOL_CALLS_LOCAL code in
13663 allocate_dynrelocs. */
13664 call_reloc_p = TRUE;
13665 may_need_local_target_p = TRUE;
13666 }
13667 else
13668 /* We are creating a shared library or relocatable
13669 executable, and this is a reloc against a global symbol,
13670 or a non-PC-relative reloc against a local symbol.
13671 We may need to copy the reloc into the output. */
13672 may_become_dynamic_p = TRUE;
13673 }
13674 else
13675 may_need_local_target_p = TRUE;
13676 break;
13677
13678 /* This relocation describes the C++ object vtable hierarchy.
13679 Reconstruct it for later use during GC. */
13680 case R_ARM_GNU_VTINHERIT:
13681 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
13682 return FALSE;
13683 break;
13684
13685 /* This relocation describes which C++ vtable entries are actually
13686 used. Record for later use during GC. */
13687 case R_ARM_GNU_VTENTRY:
13688 BFD_ASSERT (h != NULL);
13689 if (h != NULL
13690 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
13691 return FALSE;
13692 break;
13693 }
13694
13695 if (h != NULL)
13696 {
13697 if (call_reloc_p)
13698 /* We may need a .plt entry if the function this reloc
13699 refers to is in a different object, regardless of the
13700 symbol's type. We can't tell for sure yet, because
13701 something later might force the symbol local. */
13702 h->needs_plt = 1;
13703 else if (may_need_local_target_p)
13704 /* If this reloc is in a read-only section, we might
13705 need a copy reloc. We can't check reliably at this
13706 stage whether the section is read-only, as input
13707 sections have not yet been mapped to output sections.
13708 Tentatively set the flag for now, and correct in
13709 adjust_dynamic_symbol. */
13710 h->non_got_ref = 1;
13711 }
13712
13713 if (may_need_local_target_p
13714 && (h != NULL || ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC))
13715 {
13716 union gotplt_union *root_plt;
13717 struct arm_plt_info *arm_plt;
13718 struct arm_local_iplt_info *local_iplt;
13719
13720 if (h != NULL)
13721 {
13722 root_plt = &h->plt;
13723 arm_plt = &eh->plt;
13724 }
13725 else
13726 {
13727 local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx);
13728 if (local_iplt == NULL)
13729 return FALSE;
13730 root_plt = &local_iplt->root;
13731 arm_plt = &local_iplt->arm;
13732 }
13733
13734 /* If the symbol is a function that doesn't bind locally,
13735 this relocation will need a PLT entry. */
13736 if (root_plt->refcount != -1)
13737 root_plt->refcount += 1;
13738
13739 if (!call_reloc_p)
13740 arm_plt->noncall_refcount++;
13741
13742 /* It's too early to use htab->use_blx here, so we have to
13743 record possible blx references separately from
13744 relocs that definitely need a thumb stub. */
13745
13746 if (r_type == R_ARM_THM_CALL)
13747 arm_plt->maybe_thumb_refcount += 1;
13748
13749 if (r_type == R_ARM_THM_JUMP24
13750 || r_type == R_ARM_THM_JUMP19)
13751 arm_plt->thumb_refcount += 1;
13752 }
13753
13754 if (may_become_dynamic_p)
13755 {
13756 struct elf_dyn_relocs *p, **head;
13757
13758 /* Create a reloc section in dynobj. */
13759 if (sreloc == NULL)
13760 {
13761 sreloc = _bfd_elf_make_dynamic_reloc_section
13762 (sec, dynobj, 2, abfd, ! htab->use_rel);
13763
13764 if (sreloc == NULL)
13765 return FALSE;
13766
13767 /* BPABI objects never have dynamic relocations mapped. */
13768 if (htab->symbian_p)
13769 {
13770 flagword flags;
13771
13772 flags = bfd_get_section_flags (dynobj, sreloc);
13773 flags &= ~(SEC_LOAD | SEC_ALLOC);
13774 bfd_set_section_flags (dynobj, sreloc, flags);
13775 }
13776 }
13777
13778 /* If this is a global symbol, count the number of
13779 relocations we need for this symbol. */
13780 if (h != NULL)
13781 head = &((struct elf32_arm_link_hash_entry *) h)->dyn_relocs;
13782 else
13783 {
13784 head = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym);
13785 if (head == NULL)
13786 return FALSE;
13787 }
13788
13789 p = *head;
13790 if (p == NULL || p->sec != sec)
13791 {
13792 bfd_size_type amt = sizeof *p;
13793
13794 p = (struct elf_dyn_relocs *) bfd_alloc (htab->root.dynobj, amt);
13795 if (p == NULL)
13796 return FALSE;
13797 p->next = *head;
13798 *head = p;
13799 p->sec = sec;
13800 p->count = 0;
13801 p->pc_count = 0;
13802 }
13803
13804 if (elf32_arm_howto_from_type (r_type)->pc_relative)
13805 p->pc_count += 1;
13806 p->count += 1;
13807 }
13808 }
13809
13810 return TRUE;
13811 }
13812
13813 /* Unwinding tables are not referenced directly. This pass marks them as
13814 required if the corresponding code section is marked. */
13815
13816 static bfd_boolean
13817 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
13818 elf_gc_mark_hook_fn gc_mark_hook)
13819 {
13820 bfd *sub;
13821 Elf_Internal_Shdr **elf_shdrp;
13822 bfd_boolean again;
13823
13824 _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook);
13825
13826 /* Marking EH data may cause additional code sections to be marked,
13827 requiring multiple passes. */
13828 again = TRUE;
13829 while (again)
13830 {
13831 again = FALSE;
13832 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
13833 {
13834 asection *o;
13835
13836 if (! is_arm_elf (sub))
13837 continue;
13838
13839 elf_shdrp = elf_elfsections (sub);
13840 for (o = sub->sections; o != NULL; o = o->next)
13841 {
13842 Elf_Internal_Shdr *hdr;
13843
13844 hdr = &elf_section_data (o)->this_hdr;
13845 if (hdr->sh_type == SHT_ARM_EXIDX
13846 && hdr->sh_link
13847 && hdr->sh_link < elf_numsections (sub)
13848 && !o->gc_mark
13849 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
13850 {
13851 again = TRUE;
13852 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
13853 return FALSE;
13854 }
13855 }
13856 }
13857 }
13858
13859 return TRUE;
13860 }
13861
13862 /* Treat mapping symbols as special target symbols. */
13863
13864 static bfd_boolean
13865 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
13866 {
13867 return bfd_is_arm_special_symbol_name (sym->name,
13868 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
13869 }
13870
13871 /* This is a copy of elf_find_function() from elf.c except that
13872 ARM mapping symbols are ignored when looking for function names
13873 and STT_ARM_TFUNC is considered to a function type. */
13874
13875 static bfd_boolean
13876 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
13877 asymbol ** symbols,
13878 asection * section,
13879 bfd_vma offset,
13880 const char ** filename_ptr,
13881 const char ** functionname_ptr)
13882 {
13883 const char * filename = NULL;
13884 asymbol * func = NULL;
13885 bfd_vma low_func = 0;
13886 asymbol ** p;
13887
13888 for (p = symbols; *p != NULL; p++)
13889 {
13890 elf_symbol_type *q;
13891
13892 q = (elf_symbol_type *) *p;
13893
13894 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
13895 {
13896 default:
13897 break;
13898 case STT_FILE:
13899 filename = bfd_asymbol_name (&q->symbol);
13900 break;
13901 case STT_FUNC:
13902 case STT_ARM_TFUNC:
13903 case STT_NOTYPE:
13904 /* Skip mapping symbols. */
13905 if ((q->symbol.flags & BSF_LOCAL)
13906 && bfd_is_arm_special_symbol_name (q->symbol.name,
13907 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
13908 continue;
13909 /* Fall through. */
13910 if (bfd_get_section (&q->symbol) == section
13911 && q->symbol.value >= low_func
13912 && q->symbol.value <= offset)
13913 {
13914 func = (asymbol *) q;
13915 low_func = q->symbol.value;
13916 }
13917 break;
13918 }
13919 }
13920
13921 if (func == NULL)
13922 return FALSE;
13923
13924 if (filename_ptr)
13925 *filename_ptr = filename;
13926 if (functionname_ptr)
13927 *functionname_ptr = bfd_asymbol_name (func);
13928
13929 return TRUE;
13930 }
13931
13932
13933 /* Find the nearest line to a particular section and offset, for error
13934 reporting. This code is a duplicate of the code in elf.c, except
13935 that it uses arm_elf_find_function. */
13936
13937 static bfd_boolean
13938 elf32_arm_find_nearest_line (bfd * abfd,
13939 asymbol ** symbols,
13940 asection * section,
13941 bfd_vma offset,
13942 const char ** filename_ptr,
13943 const char ** functionname_ptr,
13944 unsigned int * line_ptr,
13945 unsigned int * discriminator_ptr)
13946 {
13947 bfd_boolean found = FALSE;
13948
13949 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
13950 filename_ptr, functionname_ptr,
13951 line_ptr, discriminator_ptr,
13952 dwarf_debug_sections, 0,
13953 & elf_tdata (abfd)->dwarf2_find_line_info))
13954 {
13955 if (!*functionname_ptr)
13956 arm_elf_find_function (abfd, symbols, section, offset,
13957 *filename_ptr ? NULL : filename_ptr,
13958 functionname_ptr);
13959
13960 return TRUE;
13961 }
13962
13963 /* Skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain
13964 uses DWARF1. */
13965
13966 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
13967 & found, filename_ptr,
13968 functionname_ptr, line_ptr,
13969 & elf_tdata (abfd)->line_info))
13970 return FALSE;
13971
13972 if (found && (*functionname_ptr || *line_ptr))
13973 return TRUE;
13974
13975 if (symbols == NULL)
13976 return FALSE;
13977
13978 if (! arm_elf_find_function (abfd, symbols, section, offset,
13979 filename_ptr, functionname_ptr))
13980 return FALSE;
13981
13982 *line_ptr = 0;
13983 return TRUE;
13984 }
13985
13986 static bfd_boolean
13987 elf32_arm_find_inliner_info (bfd * abfd,
13988 const char ** filename_ptr,
13989 const char ** functionname_ptr,
13990 unsigned int * line_ptr)
13991 {
13992 bfd_boolean found;
13993 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
13994 functionname_ptr, line_ptr,
13995 & elf_tdata (abfd)->dwarf2_find_line_info);
13996 return found;
13997 }
13998
13999 /* Adjust a symbol defined by a dynamic object and referenced by a
14000 regular object. The current definition is in some section of the
14001 dynamic object, but we're not including those sections. We have to
14002 change the definition to something the rest of the link can
14003 understand. */
14004
14005 static bfd_boolean
14006 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
14007 struct elf_link_hash_entry * h)
14008 {
14009 bfd * dynobj;
14010 asection * s;
14011 struct elf32_arm_link_hash_entry * eh;
14012 struct elf32_arm_link_hash_table *globals;
14013
14014 globals = elf32_arm_hash_table (info);
14015 if (globals == NULL)
14016 return FALSE;
14017
14018 dynobj = elf_hash_table (info)->dynobj;
14019
14020 /* Make sure we know what is going on here. */
14021 BFD_ASSERT (dynobj != NULL
14022 && (h->needs_plt
14023 || h->type == STT_GNU_IFUNC
14024 || h->u.weakdef != NULL
14025 || (h->def_dynamic
14026 && h->ref_regular
14027 && !h->def_regular)));
14028
14029 eh = (struct elf32_arm_link_hash_entry *) h;
14030
14031 /* If this is a function, put it in the procedure linkage table. We
14032 will fill in the contents of the procedure linkage table later,
14033 when we know the address of the .got section. */
14034 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
14035 {
14036 /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the
14037 symbol binds locally. */
14038 if (h->plt.refcount <= 0
14039 || (h->type != STT_GNU_IFUNC
14040 && (SYMBOL_CALLS_LOCAL (info, h)
14041 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
14042 && h->root.type == bfd_link_hash_undefweak))))
14043 {
14044 /* This case can occur if we saw a PLT32 reloc in an input
14045 file, but the symbol was never referred to by a dynamic
14046 object, or if all references were garbage collected. In
14047 such a case, we don't actually need to build a procedure
14048 linkage table, and we can just do a PC24 reloc instead. */
14049 h->plt.offset = (bfd_vma) -1;
14050 eh->plt.thumb_refcount = 0;
14051 eh->plt.maybe_thumb_refcount = 0;
14052 eh->plt.noncall_refcount = 0;
14053 h->needs_plt = 0;
14054 }
14055
14056 return TRUE;
14057 }
14058 else
14059 {
14060 /* It's possible that we incorrectly decided a .plt reloc was
14061 needed for an R_ARM_PC24 or similar reloc to a non-function sym
14062 in check_relocs. We can't decide accurately between function
14063 and non-function syms in check-relocs; Objects loaded later in
14064 the link may change h->type. So fix it now. */
14065 h->plt.offset = (bfd_vma) -1;
14066 eh->plt.thumb_refcount = 0;
14067 eh->plt.maybe_thumb_refcount = 0;
14068 eh->plt.noncall_refcount = 0;
14069 }
14070
14071 /* If this is a weak symbol, and there is a real definition, the
14072 processor independent code will have arranged for us to see the
14073 real definition first, and we can just use the same value. */
14074 if (h->u.weakdef != NULL)
14075 {
14076 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
14077 || h->u.weakdef->root.type == bfd_link_hash_defweak);
14078 h->root.u.def.section = h->u.weakdef->root.u.def.section;
14079 h->root.u.def.value = h->u.weakdef->root.u.def.value;
14080 return TRUE;
14081 }
14082
14083 /* If there are no non-GOT references, we do not need a copy
14084 relocation. */
14085 if (!h->non_got_ref)
14086 return TRUE;
14087
14088 /* This is a reference to a symbol defined by a dynamic object which
14089 is not a function. */
14090
14091 /* If we are creating a shared library, we must presume that the
14092 only references to the symbol are via the global offset table.
14093 For such cases we need not do anything here; the relocations will
14094 be handled correctly by relocate_section. Relocatable executables
14095 can reference data in shared objects directly, so we don't need to
14096 do anything here. */
14097 if (bfd_link_pic (info) || globals->root.is_relocatable_executable)
14098 return TRUE;
14099
14100 /* We must allocate the symbol in our .dynbss section, which will
14101 become part of the .bss section of the executable. There will be
14102 an entry for this symbol in the .dynsym section. The dynamic
14103 object will contain position independent code, so all references
14104 from the dynamic object to this symbol will go through the global
14105 offset table. The dynamic linker will use the .dynsym entry to
14106 determine the address it must put in the global offset table, so
14107 both the dynamic object and the regular object will refer to the
14108 same memory location for the variable. */
14109 s = bfd_get_linker_section (dynobj, ".dynbss");
14110 BFD_ASSERT (s != NULL);
14111
14112 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
14113 copy the initial value out of the dynamic object and into the
14114 runtime process image. We need to remember the offset into the
14115 .rel(a).bss section we are going to use. */
14116 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
14117 {
14118 asection *srel;
14119
14120 srel = bfd_get_linker_section (dynobj, RELOC_SECTION (globals, ".bss"));
14121 elf32_arm_allocate_dynrelocs (info, srel, 1);
14122 h->needs_copy = 1;
14123 }
14124
14125 return _bfd_elf_adjust_dynamic_copy (info, h, s);
14126 }
14127
14128 /* Allocate space in .plt, .got and associated reloc sections for
14129 dynamic relocs. */
14130
14131 static bfd_boolean
14132 allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf)
14133 {
14134 struct bfd_link_info *info;
14135 struct elf32_arm_link_hash_table *htab;
14136 struct elf32_arm_link_hash_entry *eh;
14137 struct elf_dyn_relocs *p;
14138
14139 if (h->root.type == bfd_link_hash_indirect)
14140 return TRUE;
14141
14142 eh = (struct elf32_arm_link_hash_entry *) h;
14143
14144 info = (struct bfd_link_info *) inf;
14145 htab = elf32_arm_hash_table (info);
14146 if (htab == NULL)
14147 return FALSE;
14148
14149 if ((htab->root.dynamic_sections_created || h->type == STT_GNU_IFUNC)
14150 && h->plt.refcount > 0)
14151 {
14152 /* Make sure this symbol is output as a dynamic symbol.
14153 Undefined weak syms won't yet be marked as dynamic. */
14154 if (h->dynindx == -1
14155 && !h->forced_local)
14156 {
14157 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14158 return FALSE;
14159 }
14160
14161 /* If the call in the PLT entry binds locally, the associated
14162 GOT entry should use an R_ARM_IRELATIVE relocation instead of
14163 the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather
14164 than the .plt section. */
14165 if (h->type == STT_GNU_IFUNC && SYMBOL_CALLS_LOCAL (info, h))
14166 {
14167 eh->is_iplt = 1;
14168 if (eh->plt.noncall_refcount == 0
14169 && SYMBOL_REFERENCES_LOCAL (info, h))
14170 /* All non-call references can be resolved directly.
14171 This means that they can (and in some cases, must)
14172 resolve directly to the run-time target, rather than
14173 to the PLT. That in turns means that any .got entry
14174 would be equal to the .igot.plt entry, so there's
14175 no point having both. */
14176 h->got.refcount = 0;
14177 }
14178
14179 if (bfd_link_pic (info)
14180 || eh->is_iplt
14181 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
14182 {
14183 elf32_arm_allocate_plt_entry (info, eh->is_iplt, &h->plt, &eh->plt);
14184
14185 /* If this symbol is not defined in a regular file, and we are
14186 not generating a shared library, then set the symbol to this
14187 location in the .plt. This is required to make function
14188 pointers compare as equal between the normal executable and
14189 the shared library. */
14190 if (! bfd_link_pic (info)
14191 && !h->def_regular)
14192 {
14193 h->root.u.def.section = htab->root.splt;
14194 h->root.u.def.value = h->plt.offset;
14195
14196 /* Make sure the function is not marked as Thumb, in case
14197 it is the target of an ABS32 relocation, which will
14198 point to the PLT entry. */
14199 h->target_internal = ST_BRANCH_TO_ARM;
14200 }
14201
14202 /* VxWorks executables have a second set of relocations for
14203 each PLT entry. They go in a separate relocation section,
14204 which is processed by the kernel loader. */
14205 if (htab->vxworks_p && !bfd_link_pic (info))
14206 {
14207 /* There is a relocation for the initial PLT entry:
14208 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
14209 if (h->plt.offset == htab->plt_header_size)
14210 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 1);
14211
14212 /* There are two extra relocations for each subsequent
14213 PLT entry: an R_ARM_32 relocation for the GOT entry,
14214 and an R_ARM_32 relocation for the PLT entry. */
14215 elf32_arm_allocate_dynrelocs (info, htab->srelplt2, 2);
14216 }
14217 }
14218 else
14219 {
14220 h->plt.offset = (bfd_vma) -1;
14221 h->needs_plt = 0;
14222 }
14223 }
14224 else
14225 {
14226 h->plt.offset = (bfd_vma) -1;
14227 h->needs_plt = 0;
14228 }
14229
14230 eh = (struct elf32_arm_link_hash_entry *) h;
14231 eh->tlsdesc_got = (bfd_vma) -1;
14232
14233 if (h->got.refcount > 0)
14234 {
14235 asection *s;
14236 bfd_boolean dyn;
14237 int tls_type = elf32_arm_hash_entry (h)->tls_type;
14238 int indx;
14239
14240 /* Make sure this symbol is output as a dynamic symbol.
14241 Undefined weak syms won't yet be marked as dynamic. */
14242 if (h->dynindx == -1
14243 && !h->forced_local)
14244 {
14245 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14246 return FALSE;
14247 }
14248
14249 if (!htab->symbian_p)
14250 {
14251 s = htab->root.sgot;
14252 h->got.offset = s->size;
14253
14254 if (tls_type == GOT_UNKNOWN)
14255 abort ();
14256
14257 if (tls_type == GOT_NORMAL)
14258 /* Non-TLS symbols need one GOT slot. */
14259 s->size += 4;
14260 else
14261 {
14262 if (tls_type & GOT_TLS_GDESC)
14263 {
14264 /* R_ARM_TLS_DESC needs 2 GOT slots. */
14265 eh->tlsdesc_got
14266 = (htab->root.sgotplt->size
14267 - elf32_arm_compute_jump_table_size (htab));
14268 htab->root.sgotplt->size += 8;
14269 h->got.offset = (bfd_vma) -2;
14270 /* plt.got_offset needs to know there's a TLS_DESC
14271 reloc in the middle of .got.plt. */
14272 htab->num_tls_desc++;
14273 }
14274
14275 if (tls_type & GOT_TLS_GD)
14276 {
14277 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. If
14278 the symbol is both GD and GDESC, got.offset may
14279 have been overwritten. */
14280 h->got.offset = s->size;
14281 s->size += 8;
14282 }
14283
14284 if (tls_type & GOT_TLS_IE)
14285 /* R_ARM_TLS_IE32 needs one GOT slot. */
14286 s->size += 4;
14287 }
14288
14289 dyn = htab->root.dynamic_sections_created;
14290
14291 indx = 0;
14292 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
14293 bfd_link_pic (info),
14294 h)
14295 && (!bfd_link_pic (info)
14296 || !SYMBOL_REFERENCES_LOCAL (info, h)))
14297 indx = h->dynindx;
14298
14299 if (tls_type != GOT_NORMAL
14300 && (bfd_link_pic (info) || indx != 0)
14301 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
14302 || h->root.type != bfd_link_hash_undefweak))
14303 {
14304 if (tls_type & GOT_TLS_IE)
14305 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14306
14307 if (tls_type & GOT_TLS_GD)
14308 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14309
14310 if (tls_type & GOT_TLS_GDESC)
14311 {
14312 elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1);
14313 /* GDESC needs a trampoline to jump to. */
14314 htab->tls_trampoline = -1;
14315 }
14316
14317 /* Only GD needs it. GDESC just emits one relocation per
14318 2 entries. */
14319 if ((tls_type & GOT_TLS_GD) && indx != 0)
14320 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14321 }
14322 else if (indx != -1 && !SYMBOL_REFERENCES_LOCAL (info, h))
14323 {
14324 if (htab->root.dynamic_sections_created)
14325 /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */
14326 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14327 }
14328 else if (h->type == STT_GNU_IFUNC
14329 && eh->plt.noncall_refcount == 0)
14330 /* No non-call references resolve the STT_GNU_IFUNC's PLT entry;
14331 they all resolve dynamically instead. Reserve room for the
14332 GOT entry's R_ARM_IRELATIVE relocation. */
14333 elf32_arm_allocate_irelocs (info, htab->root.srelgot, 1);
14334 else if (bfd_link_pic (info)
14335 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
14336 || h->root.type != bfd_link_hash_undefweak))
14337 /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */
14338 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14339 }
14340 }
14341 else
14342 h->got.offset = (bfd_vma) -1;
14343
14344 /* Allocate stubs for exported Thumb functions on v4t. */
14345 if (!htab->use_blx && h->dynindx != -1
14346 && h->def_regular
14347 && h->target_internal == ST_BRANCH_TO_THUMB
14348 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
14349 {
14350 struct elf_link_hash_entry * th;
14351 struct bfd_link_hash_entry * bh;
14352 struct elf_link_hash_entry * myh;
14353 char name[1024];
14354 asection *s;
14355 bh = NULL;
14356 /* Create a new symbol to regist the real location of the function. */
14357 s = h->root.u.def.section;
14358 sprintf (name, "__real_%s", h->root.root.string);
14359 _bfd_generic_link_add_one_symbol (info, s->owner,
14360 name, BSF_GLOBAL, s,
14361 h->root.u.def.value,
14362 NULL, TRUE, FALSE, &bh);
14363
14364 myh = (struct elf_link_hash_entry *) bh;
14365 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
14366 myh->forced_local = 1;
14367 myh->target_internal = ST_BRANCH_TO_THUMB;
14368 eh->export_glue = myh;
14369 th = record_arm_to_thumb_glue (info, h);
14370 /* Point the symbol at the stub. */
14371 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
14372 h->target_internal = ST_BRANCH_TO_ARM;
14373 h->root.u.def.section = th->root.u.def.section;
14374 h->root.u.def.value = th->root.u.def.value & ~1;
14375 }
14376
14377 if (eh->dyn_relocs == NULL)
14378 return TRUE;
14379
14380 /* In the shared -Bsymbolic case, discard space allocated for
14381 dynamic pc-relative relocs against symbols which turn out to be
14382 defined in regular objects. For the normal shared case, discard
14383 space for pc-relative relocs that have become local due to symbol
14384 visibility changes. */
14385
14386 if (bfd_link_pic (info) || htab->root.is_relocatable_executable)
14387 {
14388 /* Relocs that use pc_count are PC-relative forms, which will appear
14389 on something like ".long foo - ." or "movw REG, foo - .". We want
14390 calls to protected symbols to resolve directly to the function
14391 rather than going via the plt. If people want function pointer
14392 comparisons to work as expected then they should avoid writing
14393 assembly like ".long foo - .". */
14394 if (SYMBOL_CALLS_LOCAL (info, h))
14395 {
14396 struct elf_dyn_relocs **pp;
14397
14398 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
14399 {
14400 p->count -= p->pc_count;
14401 p->pc_count = 0;
14402 if (p->count == 0)
14403 *pp = p->next;
14404 else
14405 pp = &p->next;
14406 }
14407 }
14408
14409 if (htab->vxworks_p)
14410 {
14411 struct elf_dyn_relocs **pp;
14412
14413 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
14414 {
14415 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
14416 *pp = p->next;
14417 else
14418 pp = &p->next;
14419 }
14420 }
14421
14422 /* Also discard relocs on undefined weak syms with non-default
14423 visibility. */
14424 if (eh->dyn_relocs != NULL
14425 && h->root.type == bfd_link_hash_undefweak)
14426 {
14427 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
14428 eh->dyn_relocs = NULL;
14429
14430 /* Make sure undefined weak symbols are output as a dynamic
14431 symbol in PIEs. */
14432 else if (h->dynindx == -1
14433 && !h->forced_local)
14434 {
14435 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14436 return FALSE;
14437 }
14438 }
14439
14440 else if (htab->root.is_relocatable_executable && h->dynindx == -1
14441 && h->root.type == bfd_link_hash_new)
14442 {
14443 /* Output absolute symbols so that we can create relocations
14444 against them. For normal symbols we output a relocation
14445 against the section that contains them. */
14446 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14447 return FALSE;
14448 }
14449
14450 }
14451 else
14452 {
14453 /* For the non-shared case, discard space for relocs against
14454 symbols which turn out to need copy relocs or are not
14455 dynamic. */
14456
14457 if (!h->non_got_ref
14458 && ((h->def_dynamic
14459 && !h->def_regular)
14460 || (htab->root.dynamic_sections_created
14461 && (h->root.type == bfd_link_hash_undefweak
14462 || h->root.type == bfd_link_hash_undefined))))
14463 {
14464 /* Make sure this symbol is output as a dynamic symbol.
14465 Undefined weak syms won't yet be marked as dynamic. */
14466 if (h->dynindx == -1
14467 && !h->forced_local)
14468 {
14469 if (! bfd_elf_link_record_dynamic_symbol (info, h))
14470 return FALSE;
14471 }
14472
14473 /* If that succeeded, we know we'll be keeping all the
14474 relocs. */
14475 if (h->dynindx != -1)
14476 goto keep;
14477 }
14478
14479 eh->dyn_relocs = NULL;
14480
14481 keep: ;
14482 }
14483
14484 /* Finally, allocate space. */
14485 for (p = eh->dyn_relocs; p != NULL; p = p->next)
14486 {
14487 asection *sreloc = elf_section_data (p->sec)->sreloc;
14488 if (h->type == STT_GNU_IFUNC
14489 && eh->plt.noncall_refcount == 0
14490 && SYMBOL_REFERENCES_LOCAL (info, h))
14491 elf32_arm_allocate_irelocs (info, sreloc, p->count);
14492 else
14493 elf32_arm_allocate_dynrelocs (info, sreloc, p->count);
14494 }
14495
14496 return TRUE;
14497 }
14498
14499 /* Find any dynamic relocs that apply to read-only sections. */
14500
14501 static bfd_boolean
14502 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
14503 {
14504 struct elf32_arm_link_hash_entry * eh;
14505 struct elf_dyn_relocs * p;
14506
14507 eh = (struct elf32_arm_link_hash_entry *) h;
14508 for (p = eh->dyn_relocs; p != NULL; p = p->next)
14509 {
14510 asection *s = p->sec;
14511
14512 if (s != NULL && (s->flags & SEC_READONLY) != 0)
14513 {
14514 struct bfd_link_info *info = (struct bfd_link_info *) inf;
14515
14516 info->flags |= DF_TEXTREL;
14517
14518 /* Not an error, just cut short the traversal. */
14519 return FALSE;
14520 }
14521 }
14522 return TRUE;
14523 }
14524
14525 void
14526 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
14527 int byteswap_code)
14528 {
14529 struct elf32_arm_link_hash_table *globals;
14530
14531 globals = elf32_arm_hash_table (info);
14532 if (globals == NULL)
14533 return;
14534
14535 globals->byteswap_code = byteswap_code;
14536 }
14537
14538 /* Set the sizes of the dynamic sections. */
14539
14540 static bfd_boolean
14541 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
14542 struct bfd_link_info * info)
14543 {
14544 bfd * dynobj;
14545 asection * s;
14546 bfd_boolean plt;
14547 bfd_boolean relocs;
14548 bfd *ibfd;
14549 struct elf32_arm_link_hash_table *htab;
14550
14551 htab = elf32_arm_hash_table (info);
14552 if (htab == NULL)
14553 return FALSE;
14554
14555 dynobj = elf_hash_table (info)->dynobj;
14556 BFD_ASSERT (dynobj != NULL);
14557 check_use_blx (htab);
14558
14559 if (elf_hash_table (info)->dynamic_sections_created)
14560 {
14561 /* Set the contents of the .interp section to the interpreter. */
14562 if (bfd_link_executable (info) && !info->nointerp)
14563 {
14564 s = bfd_get_linker_section (dynobj, ".interp");
14565 BFD_ASSERT (s != NULL);
14566 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
14567 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
14568 }
14569 }
14570
14571 /* Set up .got offsets for local syms, and space for local dynamic
14572 relocs. */
14573 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
14574 {
14575 bfd_signed_vma *local_got;
14576 bfd_signed_vma *end_local_got;
14577 struct arm_local_iplt_info **local_iplt_ptr, *local_iplt;
14578 char *local_tls_type;
14579 bfd_vma *local_tlsdesc_gotent;
14580 bfd_size_type locsymcount;
14581 Elf_Internal_Shdr *symtab_hdr;
14582 asection *srel;
14583 bfd_boolean is_vxworks = htab->vxworks_p;
14584 unsigned int symndx;
14585
14586 if (! is_arm_elf (ibfd))
14587 continue;
14588
14589 for (s = ibfd->sections; s != NULL; s = s->next)
14590 {
14591 struct elf_dyn_relocs *p;
14592
14593 for (p = (struct elf_dyn_relocs *)
14594 elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
14595 {
14596 if (!bfd_is_abs_section (p->sec)
14597 && bfd_is_abs_section (p->sec->output_section))
14598 {
14599 /* Input section has been discarded, either because
14600 it is a copy of a linkonce section or due to
14601 linker script /DISCARD/, so we'll be discarding
14602 the relocs too. */
14603 }
14604 else if (is_vxworks
14605 && strcmp (p->sec->output_section->name,
14606 ".tls_vars") == 0)
14607 {
14608 /* Relocations in vxworks .tls_vars sections are
14609 handled specially by the loader. */
14610 }
14611 else if (p->count != 0)
14612 {
14613 srel = elf_section_data (p->sec)->sreloc;
14614 elf32_arm_allocate_dynrelocs (info, srel, p->count);
14615 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
14616 info->flags |= DF_TEXTREL;
14617 }
14618 }
14619 }
14620
14621 local_got = elf_local_got_refcounts (ibfd);
14622 if (!local_got)
14623 continue;
14624
14625 symtab_hdr = & elf_symtab_hdr (ibfd);
14626 locsymcount = symtab_hdr->sh_info;
14627 end_local_got = local_got + locsymcount;
14628 local_iplt_ptr = elf32_arm_local_iplt (ibfd);
14629 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
14630 local_tlsdesc_gotent = elf32_arm_local_tlsdesc_gotent (ibfd);
14631 symndx = 0;
14632 s = htab->root.sgot;
14633 srel = htab->root.srelgot;
14634 for (; local_got < end_local_got;
14635 ++local_got, ++local_iplt_ptr, ++local_tls_type,
14636 ++local_tlsdesc_gotent, ++symndx)
14637 {
14638 *local_tlsdesc_gotent = (bfd_vma) -1;
14639 local_iplt = *local_iplt_ptr;
14640 if (local_iplt != NULL)
14641 {
14642 struct elf_dyn_relocs *p;
14643
14644 if (local_iplt->root.refcount > 0)
14645 {
14646 elf32_arm_allocate_plt_entry (info, TRUE,
14647 &local_iplt->root,
14648 &local_iplt->arm);
14649 if (local_iplt->arm.noncall_refcount == 0)
14650 /* All references to the PLT are calls, so all
14651 non-call references can resolve directly to the
14652 run-time target. This means that the .got entry
14653 would be the same as the .igot.plt entry, so there's
14654 no point creating both. */
14655 *local_got = 0;
14656 }
14657 else
14658 {
14659 BFD_ASSERT (local_iplt->arm.noncall_refcount == 0);
14660 local_iplt->root.offset = (bfd_vma) -1;
14661 }
14662
14663 for (p = local_iplt->dyn_relocs; p != NULL; p = p->next)
14664 {
14665 asection *psrel;
14666
14667 psrel = elf_section_data (p->sec)->sreloc;
14668 if (local_iplt->arm.noncall_refcount == 0)
14669 elf32_arm_allocate_irelocs (info, psrel, p->count);
14670 else
14671 elf32_arm_allocate_dynrelocs (info, psrel, p->count);
14672 }
14673 }
14674 if (*local_got > 0)
14675 {
14676 Elf_Internal_Sym *isym;
14677
14678 *local_got = s->size;
14679 if (*local_tls_type & GOT_TLS_GD)
14680 /* TLS_GD relocs need an 8-byte structure in the GOT. */
14681 s->size += 8;
14682 if (*local_tls_type & GOT_TLS_GDESC)
14683 {
14684 *local_tlsdesc_gotent = htab->root.sgotplt->size
14685 - elf32_arm_compute_jump_table_size (htab);
14686 htab->root.sgotplt->size += 8;
14687 *local_got = (bfd_vma) -2;
14688 /* plt.got_offset needs to know there's a TLS_DESC
14689 reloc in the middle of .got.plt. */
14690 htab->num_tls_desc++;
14691 }
14692 if (*local_tls_type & GOT_TLS_IE)
14693 s->size += 4;
14694
14695 if (*local_tls_type & GOT_NORMAL)
14696 {
14697 /* If the symbol is both GD and GDESC, *local_got
14698 may have been overwritten. */
14699 *local_got = s->size;
14700 s->size += 4;
14701 }
14702
14703 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, symndx);
14704 if (isym == NULL)
14705 return FALSE;
14706
14707 /* If all references to an STT_GNU_IFUNC PLT are calls,
14708 then all non-call references, including this GOT entry,
14709 resolve directly to the run-time target. */
14710 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
14711 && (local_iplt == NULL
14712 || local_iplt->arm.noncall_refcount == 0))
14713 elf32_arm_allocate_irelocs (info, srel, 1);
14714 else if (bfd_link_pic (info) || output_bfd->flags & DYNAMIC)
14715 {
14716 if ((bfd_link_pic (info) && !(*local_tls_type & GOT_TLS_GDESC))
14717 || *local_tls_type & GOT_TLS_GD)
14718 elf32_arm_allocate_dynrelocs (info, srel, 1);
14719
14720 if (bfd_link_pic (info) && *local_tls_type & GOT_TLS_GDESC)
14721 {
14722 elf32_arm_allocate_dynrelocs (info,
14723 htab->root.srelplt, 1);
14724 htab->tls_trampoline = -1;
14725 }
14726 }
14727 }
14728 else
14729 *local_got = (bfd_vma) -1;
14730 }
14731 }
14732
14733 if (htab->tls_ldm_got.refcount > 0)
14734 {
14735 /* Allocate two GOT entries and one dynamic relocation (if necessary)
14736 for R_ARM_TLS_LDM32 relocations. */
14737 htab->tls_ldm_got.offset = htab->root.sgot->size;
14738 htab->root.sgot->size += 8;
14739 if (bfd_link_pic (info))
14740 elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1);
14741 }
14742 else
14743 htab->tls_ldm_got.offset = -1;
14744
14745 /* Allocate global sym .plt and .got entries, and space for global
14746 sym dynamic relocs. */
14747 elf_link_hash_traverse (& htab->root, allocate_dynrelocs_for_symbol, info);
14748
14749 /* Here we rummage through the found bfds to collect glue information. */
14750 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
14751 {
14752 if (! is_arm_elf (ibfd))
14753 continue;
14754
14755 /* Initialise mapping tables for code/data. */
14756 bfd_elf32_arm_init_maps (ibfd);
14757
14758 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
14759 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info)
14760 || !bfd_elf32_arm_stm32l4xx_erratum_scan (ibfd, info))
14761 /* xgettext:c-format */
14762 _bfd_error_handler (_("Errors encountered processing file %s"),
14763 ibfd->filename);
14764 }
14765
14766 /* Allocate space for the glue sections now that we've sized them. */
14767 bfd_elf32_arm_allocate_interworking_sections (info);
14768
14769 /* For every jump slot reserved in the sgotplt, reloc_count is
14770 incremented. However, when we reserve space for TLS descriptors,
14771 it's not incremented, so in order to compute the space reserved
14772 for them, it suffices to multiply the reloc count by the jump
14773 slot size. */
14774 if (htab->root.srelplt)
14775 htab->sgotplt_jump_table_size = elf32_arm_compute_jump_table_size(htab);
14776
14777 if (htab->tls_trampoline)
14778 {
14779 if (htab->root.splt->size == 0)
14780 htab->root.splt->size += htab->plt_header_size;
14781
14782 htab->tls_trampoline = htab->root.splt->size;
14783 htab->root.splt->size += htab->plt_entry_size;
14784
14785 /* If we're not using lazy TLS relocations, don't generate the
14786 PLT and GOT entries they require. */
14787 if (!(info->flags & DF_BIND_NOW))
14788 {
14789 htab->dt_tlsdesc_got = htab->root.sgot->size;
14790 htab->root.sgot->size += 4;
14791
14792 htab->dt_tlsdesc_plt = htab->root.splt->size;
14793 htab->root.splt->size += 4 * ARRAY_SIZE (dl_tlsdesc_lazy_trampoline);
14794 }
14795 }
14796
14797 /* The check_relocs and adjust_dynamic_symbol entry points have
14798 determined the sizes of the various dynamic sections. Allocate
14799 memory for them. */
14800 plt = FALSE;
14801 relocs = FALSE;
14802 for (s = dynobj->sections; s != NULL; s = s->next)
14803 {
14804 const char * name;
14805
14806 if ((s->flags & SEC_LINKER_CREATED) == 0)
14807 continue;
14808
14809 /* It's OK to base decisions on the section name, because none
14810 of the dynobj section names depend upon the input files. */
14811 name = bfd_get_section_name (dynobj, s);
14812
14813 if (s == htab->root.splt)
14814 {
14815 /* Remember whether there is a PLT. */
14816 plt = s->size != 0;
14817 }
14818 else if (CONST_STRNEQ (name, ".rel"))
14819 {
14820 if (s->size != 0)
14821 {
14822 /* Remember whether there are any reloc sections other
14823 than .rel(a).plt and .rela.plt.unloaded. */
14824 if (s != htab->root.srelplt && s != htab->srelplt2)
14825 relocs = TRUE;
14826
14827 /* We use the reloc_count field as a counter if we need
14828 to copy relocs into the output file. */
14829 s->reloc_count = 0;
14830 }
14831 }
14832 else if (s != htab->root.sgot
14833 && s != htab->root.sgotplt
14834 && s != htab->root.iplt
14835 && s != htab->root.igotplt
14836 && s != htab->sdynbss)
14837 {
14838 /* It's not one of our sections, so don't allocate space. */
14839 continue;
14840 }
14841
14842 if (s->size == 0)
14843 {
14844 /* If we don't need this section, strip it from the
14845 output file. This is mostly to handle .rel(a).bss and
14846 .rel(a).plt. We must create both sections in
14847 create_dynamic_sections, because they must be created
14848 before the linker maps input sections to output
14849 sections. The linker does that before
14850 adjust_dynamic_symbol is called, and it is that
14851 function which decides whether anything needs to go
14852 into these sections. */
14853 s->flags |= SEC_EXCLUDE;
14854 continue;
14855 }
14856
14857 if ((s->flags & SEC_HAS_CONTENTS) == 0)
14858 continue;
14859
14860 /* Allocate memory for the section contents. */
14861 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
14862 if (s->contents == NULL)
14863 return FALSE;
14864 }
14865
14866 if (elf_hash_table (info)->dynamic_sections_created)
14867 {
14868 /* Add some entries to the .dynamic section. We fill in the
14869 values later, in elf32_arm_finish_dynamic_sections, but we
14870 must add the entries now so that we get the correct size for
14871 the .dynamic section. The DT_DEBUG entry is filled in by the
14872 dynamic linker and used by the debugger. */
14873 #define add_dynamic_entry(TAG, VAL) \
14874 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
14875
14876 if (bfd_link_executable (info))
14877 {
14878 if (!add_dynamic_entry (DT_DEBUG, 0))
14879 return FALSE;
14880 }
14881
14882 if (plt)
14883 {
14884 if ( !add_dynamic_entry (DT_PLTGOT, 0)
14885 || !add_dynamic_entry (DT_PLTRELSZ, 0)
14886 || !add_dynamic_entry (DT_PLTREL,
14887 htab->use_rel ? DT_REL : DT_RELA)
14888 || !add_dynamic_entry (DT_JMPREL, 0))
14889 return FALSE;
14890
14891 if (htab->dt_tlsdesc_plt &&
14892 (!add_dynamic_entry (DT_TLSDESC_PLT,0)
14893 || !add_dynamic_entry (DT_TLSDESC_GOT,0)))
14894 return FALSE;
14895 }
14896
14897 if (relocs)
14898 {
14899 if (htab->use_rel)
14900 {
14901 if (!add_dynamic_entry (DT_REL, 0)
14902 || !add_dynamic_entry (DT_RELSZ, 0)
14903 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
14904 return FALSE;
14905 }
14906 else
14907 {
14908 if (!add_dynamic_entry (DT_RELA, 0)
14909 || !add_dynamic_entry (DT_RELASZ, 0)
14910 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
14911 return FALSE;
14912 }
14913 }
14914
14915 /* If any dynamic relocs apply to a read-only section,
14916 then we need a DT_TEXTREL entry. */
14917 if ((info->flags & DF_TEXTREL) == 0)
14918 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
14919 info);
14920
14921 if ((info->flags & DF_TEXTREL) != 0)
14922 {
14923 if (!add_dynamic_entry (DT_TEXTREL, 0))
14924 return FALSE;
14925 }
14926 if (htab->vxworks_p
14927 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
14928 return FALSE;
14929 }
14930 #undef add_dynamic_entry
14931
14932 return TRUE;
14933 }
14934
14935 /* Size sections even though they're not dynamic. We use it to setup
14936 _TLS_MODULE_BASE_, if needed. */
14937
14938 static bfd_boolean
14939 elf32_arm_always_size_sections (bfd *output_bfd,
14940 struct bfd_link_info *info)
14941 {
14942 asection *tls_sec;
14943
14944 if (bfd_link_relocatable (info))
14945 return TRUE;
14946
14947 tls_sec = elf_hash_table (info)->tls_sec;
14948
14949 if (tls_sec)
14950 {
14951 struct elf_link_hash_entry *tlsbase;
14952
14953 tlsbase = elf_link_hash_lookup
14954 (elf_hash_table (info), "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
14955
14956 if (tlsbase)
14957 {
14958 struct bfd_link_hash_entry *bh = NULL;
14959 const struct elf_backend_data *bed
14960 = get_elf_backend_data (output_bfd);
14961
14962 if (!(_bfd_generic_link_add_one_symbol
14963 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
14964 tls_sec, 0, NULL, FALSE,
14965 bed->collect, &bh)))
14966 return FALSE;
14967
14968 tlsbase->type = STT_TLS;
14969 tlsbase = (struct elf_link_hash_entry *)bh;
14970 tlsbase->def_regular = 1;
14971 tlsbase->other = STV_HIDDEN;
14972 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
14973 }
14974 }
14975 return TRUE;
14976 }
14977
14978 /* Finish up dynamic symbol handling. We set the contents of various
14979 dynamic sections here. */
14980
14981 static bfd_boolean
14982 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
14983 struct bfd_link_info * info,
14984 struct elf_link_hash_entry * h,
14985 Elf_Internal_Sym * sym)
14986 {
14987 struct elf32_arm_link_hash_table *htab;
14988 struct elf32_arm_link_hash_entry *eh;
14989
14990 htab = elf32_arm_hash_table (info);
14991 if (htab == NULL)
14992 return FALSE;
14993
14994 eh = (struct elf32_arm_link_hash_entry *) h;
14995
14996 if (h->plt.offset != (bfd_vma) -1)
14997 {
14998 if (!eh->is_iplt)
14999 {
15000 BFD_ASSERT (h->dynindx != -1);
15001 if (! elf32_arm_populate_plt_entry (output_bfd, info, &h->plt, &eh->plt,
15002 h->dynindx, 0))
15003 return FALSE;
15004 }
15005
15006 if (!h->def_regular)
15007 {
15008 /* Mark the symbol as undefined, rather than as defined in
15009 the .plt section. */
15010 sym->st_shndx = SHN_UNDEF;
15011 /* If the symbol is weak we need to clear the value.
15012 Otherwise, the PLT entry would provide a definition for
15013 the symbol even if the symbol wasn't defined anywhere,
15014 and so the symbol would never be NULL. Leave the value if
15015 there were any relocations where pointer equality matters
15016 (this is a clue for the dynamic linker, to make function
15017 pointer comparisons work between an application and shared
15018 library). */
15019 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
15020 sym->st_value = 0;
15021 }
15022 else if (eh->is_iplt && eh->plt.noncall_refcount != 0)
15023 {
15024 /* At least one non-call relocation references this .iplt entry,
15025 so the .iplt entry is the function's canonical address. */
15026 sym->st_info = ELF_ST_INFO (ELF_ST_BIND (sym->st_info), STT_FUNC);
15027 sym->st_target_internal = ST_BRANCH_TO_ARM;
15028 sym->st_shndx = (_bfd_elf_section_from_bfd_section
15029 (output_bfd, htab->root.iplt->output_section));
15030 sym->st_value = (h->plt.offset
15031 + htab->root.iplt->output_section->vma
15032 + htab->root.iplt->output_offset);
15033 }
15034 }
15035
15036 if (h->needs_copy)
15037 {
15038 asection * s;
15039 Elf_Internal_Rela rel;
15040
15041 /* This symbol needs a copy reloc. Set it up. */
15042 BFD_ASSERT (h->dynindx != -1
15043 && (h->root.type == bfd_link_hash_defined
15044 || h->root.type == bfd_link_hash_defweak));
15045
15046 s = htab->srelbss;
15047 BFD_ASSERT (s != NULL);
15048
15049 rel.r_addend = 0;
15050 rel.r_offset = (h->root.u.def.value
15051 + h->root.u.def.section->output_section->vma
15052 + h->root.u.def.section->output_offset);
15053 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
15054 elf32_arm_add_dynreloc (output_bfd, info, s, &rel);
15055 }
15056
15057 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
15058 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
15059 to the ".got" section. */
15060 if (h == htab->root.hdynamic
15061 || (!htab->vxworks_p && h == htab->root.hgot))
15062 sym->st_shndx = SHN_ABS;
15063
15064 return TRUE;
15065 }
15066
15067 static void
15068 arm_put_trampoline (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
15069 void *contents,
15070 const unsigned long *template, unsigned count)
15071 {
15072 unsigned ix;
15073
15074 for (ix = 0; ix != count; ix++)
15075 {
15076 unsigned long insn = template[ix];
15077
15078 /* Emit mov pc,rx if bx is not permitted. */
15079 if (htab->fix_v4bx == 1 && (insn & 0x0ffffff0) == 0x012fff10)
15080 insn = (insn & 0xf000000f) | 0x01a0f000;
15081 put_arm_insn (htab, output_bfd, insn, (char *)contents + ix*4);
15082 }
15083 }
15084
15085 /* Install the special first PLT entry for elf32-arm-nacl. Unlike
15086 other variants, NaCl needs this entry in a static executable's
15087 .iplt too. When we're handling that case, GOT_DISPLACEMENT is
15088 zero. For .iplt really only the last bundle is useful, and .iplt
15089 could have a shorter first entry, with each individual PLT entry's
15090 relative branch calculated differently so it targets the last
15091 bundle instead of the instruction before it (labelled .Lplt_tail
15092 above). But it's simpler to keep the size and layout of PLT0
15093 consistent with the dynamic case, at the cost of some dead code at
15094 the start of .iplt and the one dead store to the stack at the start
15095 of .Lplt_tail. */
15096 static void
15097 arm_nacl_put_plt0 (struct elf32_arm_link_hash_table *htab, bfd *output_bfd,
15098 asection *plt, bfd_vma got_displacement)
15099 {
15100 unsigned int i;
15101
15102 put_arm_insn (htab, output_bfd,
15103 elf32_arm_nacl_plt0_entry[0]
15104 | arm_movw_immediate (got_displacement),
15105 plt->contents + 0);
15106 put_arm_insn (htab, output_bfd,
15107 elf32_arm_nacl_plt0_entry[1]
15108 | arm_movt_immediate (got_displacement),
15109 plt->contents + 4);
15110
15111 for (i = 2; i < ARRAY_SIZE (elf32_arm_nacl_plt0_entry); ++i)
15112 put_arm_insn (htab, output_bfd,
15113 elf32_arm_nacl_plt0_entry[i],
15114 plt->contents + (i * 4));
15115 }
15116
15117 /* Finish up the dynamic sections. */
15118
15119 static bfd_boolean
15120 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
15121 {
15122 bfd * dynobj;
15123 asection * sgot;
15124 asection * sdyn;
15125 struct elf32_arm_link_hash_table *htab;
15126
15127 htab = elf32_arm_hash_table (info);
15128 if (htab == NULL)
15129 return FALSE;
15130
15131 dynobj = elf_hash_table (info)->dynobj;
15132
15133 sgot = htab->root.sgotplt;
15134 /* A broken linker script might have discarded the dynamic sections.
15135 Catch this here so that we do not seg-fault later on. */
15136 if (sgot != NULL && bfd_is_abs_section (sgot->output_section))
15137 return FALSE;
15138 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15139
15140 if (elf_hash_table (info)->dynamic_sections_created)
15141 {
15142 asection *splt;
15143 Elf32_External_Dyn *dyncon, *dynconend;
15144
15145 splt = htab->root.splt;
15146 BFD_ASSERT (splt != NULL && sdyn != NULL);
15147 BFD_ASSERT (htab->symbian_p || sgot != NULL);
15148
15149 dyncon = (Elf32_External_Dyn *) sdyn->contents;
15150 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
15151
15152 for (; dyncon < dynconend; dyncon++)
15153 {
15154 Elf_Internal_Dyn dyn;
15155 const char * name;
15156 asection * s;
15157
15158 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
15159
15160 switch (dyn.d_tag)
15161 {
15162 unsigned int type;
15163
15164 default:
15165 if (htab->vxworks_p
15166 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
15167 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15168 break;
15169
15170 case DT_HASH:
15171 name = ".hash";
15172 goto get_vma_if_bpabi;
15173 case DT_STRTAB:
15174 name = ".dynstr";
15175 goto get_vma_if_bpabi;
15176 case DT_SYMTAB:
15177 name = ".dynsym";
15178 goto get_vma_if_bpabi;
15179 case DT_VERSYM:
15180 name = ".gnu.version";
15181 goto get_vma_if_bpabi;
15182 case DT_VERDEF:
15183 name = ".gnu.version_d";
15184 goto get_vma_if_bpabi;
15185 case DT_VERNEED:
15186 name = ".gnu.version_r";
15187 goto get_vma_if_bpabi;
15188
15189 case DT_PLTGOT:
15190 name = ".got";
15191 goto get_vma;
15192 case DT_JMPREL:
15193 name = RELOC_SECTION (htab, ".plt");
15194 get_vma:
15195 s = bfd_get_section_by_name (output_bfd, name);
15196 if (s == NULL)
15197 {
15198 /* PR ld/14397: Issue an error message if a required section is missing. */
15199 (*_bfd_error_handler)
15200 (_("error: required section '%s' not found in the linker script"), name);
15201 bfd_set_error (bfd_error_invalid_operation);
15202 return FALSE;
15203 }
15204 if (!htab->symbian_p)
15205 dyn.d_un.d_ptr = s->vma;
15206 else
15207 /* In the BPABI, tags in the PT_DYNAMIC section point
15208 at the file offset, not the memory address, for the
15209 convenience of the post linker. */
15210 dyn.d_un.d_ptr = s->filepos;
15211 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15212 break;
15213
15214 get_vma_if_bpabi:
15215 if (htab->symbian_p)
15216 goto get_vma;
15217 break;
15218
15219 case DT_PLTRELSZ:
15220 s = htab->root.srelplt;
15221 BFD_ASSERT (s != NULL);
15222 dyn.d_un.d_val = s->size;
15223 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15224 break;
15225
15226 case DT_RELSZ:
15227 case DT_RELASZ:
15228 if (!htab->symbian_p)
15229 {
15230 /* My reading of the SVR4 ABI indicates that the
15231 procedure linkage table relocs (DT_JMPREL) should be
15232 included in the overall relocs (DT_REL). This is
15233 what Solaris does. However, UnixWare can not handle
15234 that case. Therefore, we override the DT_RELSZ entry
15235 here to make it not include the JMPREL relocs. Since
15236 the linker script arranges for .rel(a).plt to follow all
15237 other relocation sections, we don't have to worry
15238 about changing the DT_REL entry. */
15239 s = htab->root.srelplt;
15240 if (s != NULL)
15241 dyn.d_un.d_val -= s->size;
15242 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15243 break;
15244 }
15245 /* Fall through. */
15246
15247 case DT_REL:
15248 case DT_RELA:
15249 /* In the BPABI, the DT_REL tag must point at the file
15250 offset, not the VMA, of the first relocation
15251 section. So, we use code similar to that in
15252 elflink.c, but do not check for SHF_ALLOC on the
15253 relcoation section, since relocations sections are
15254 never allocated under the BPABI. The comments above
15255 about Unixware notwithstanding, we include all of the
15256 relocations here. */
15257 if (htab->symbian_p)
15258 {
15259 unsigned int i;
15260 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
15261 ? SHT_REL : SHT_RELA);
15262 dyn.d_un.d_val = 0;
15263 for (i = 1; i < elf_numsections (output_bfd); i++)
15264 {
15265 Elf_Internal_Shdr *hdr
15266 = elf_elfsections (output_bfd)[i];
15267 if (hdr->sh_type == type)
15268 {
15269 if (dyn.d_tag == DT_RELSZ
15270 || dyn.d_tag == DT_RELASZ)
15271 dyn.d_un.d_val += hdr->sh_size;
15272 else if ((ufile_ptr) hdr->sh_offset
15273 <= dyn.d_un.d_val - 1)
15274 dyn.d_un.d_val = hdr->sh_offset;
15275 }
15276 }
15277 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15278 }
15279 break;
15280
15281 case DT_TLSDESC_PLT:
15282 s = htab->root.splt;
15283 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
15284 + htab->dt_tlsdesc_plt);
15285 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15286 break;
15287
15288 case DT_TLSDESC_GOT:
15289 s = htab->root.sgot;
15290 dyn.d_un.d_ptr = (s->output_section->vma + s->output_offset
15291 + htab->dt_tlsdesc_got);
15292 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15293 break;
15294
15295 /* Set the bottom bit of DT_INIT/FINI if the
15296 corresponding function is Thumb. */
15297 case DT_INIT:
15298 name = info->init_function;
15299 goto get_sym;
15300 case DT_FINI:
15301 name = info->fini_function;
15302 get_sym:
15303 /* If it wasn't set by elf_bfd_final_link
15304 then there is nothing to adjust. */
15305 if (dyn.d_un.d_val != 0)
15306 {
15307 struct elf_link_hash_entry * eh;
15308
15309 eh = elf_link_hash_lookup (elf_hash_table (info), name,
15310 FALSE, FALSE, TRUE);
15311 if (eh != NULL && eh->target_internal == ST_BRANCH_TO_THUMB)
15312 {
15313 dyn.d_un.d_val |= 1;
15314 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
15315 }
15316 }
15317 break;
15318 }
15319 }
15320
15321 /* Fill in the first entry in the procedure linkage table. */
15322 if (splt->size > 0 && htab->plt_header_size)
15323 {
15324 const bfd_vma *plt0_entry;
15325 bfd_vma got_address, plt_address, got_displacement;
15326
15327 /* Calculate the addresses of the GOT and PLT. */
15328 got_address = sgot->output_section->vma + sgot->output_offset;
15329 plt_address = splt->output_section->vma + splt->output_offset;
15330
15331 if (htab->vxworks_p)
15332 {
15333 /* The VxWorks GOT is relocated by the dynamic linker.
15334 Therefore, we must emit relocations rather than simply
15335 computing the values now. */
15336 Elf_Internal_Rela rel;
15337
15338 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
15339 put_arm_insn (htab, output_bfd, plt0_entry[0],
15340 splt->contents + 0);
15341 put_arm_insn (htab, output_bfd, plt0_entry[1],
15342 splt->contents + 4);
15343 put_arm_insn (htab, output_bfd, plt0_entry[2],
15344 splt->contents + 8);
15345 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
15346
15347 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
15348 rel.r_offset = plt_address + 12;
15349 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
15350 rel.r_addend = 0;
15351 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
15352 htab->srelplt2->contents);
15353 }
15354 else if (htab->nacl_p)
15355 arm_nacl_put_plt0 (htab, output_bfd, splt,
15356 got_address + 8 - (plt_address + 16));
15357 else if (using_thumb_only (htab))
15358 {
15359 got_displacement = got_address - (plt_address + 12);
15360
15361 plt0_entry = elf32_thumb2_plt0_entry;
15362 put_arm_insn (htab, output_bfd, plt0_entry[0],
15363 splt->contents + 0);
15364 put_arm_insn (htab, output_bfd, plt0_entry[1],
15365 splt->contents + 4);
15366 put_arm_insn (htab, output_bfd, plt0_entry[2],
15367 splt->contents + 8);
15368
15369 bfd_put_32 (output_bfd, got_displacement, splt->contents + 12);
15370 }
15371 else
15372 {
15373 got_displacement = got_address - (plt_address + 16);
15374
15375 plt0_entry = elf32_arm_plt0_entry;
15376 put_arm_insn (htab, output_bfd, plt0_entry[0],
15377 splt->contents + 0);
15378 put_arm_insn (htab, output_bfd, plt0_entry[1],
15379 splt->contents + 4);
15380 put_arm_insn (htab, output_bfd, plt0_entry[2],
15381 splt->contents + 8);
15382 put_arm_insn (htab, output_bfd, plt0_entry[3],
15383 splt->contents + 12);
15384
15385 #ifdef FOUR_WORD_PLT
15386 /* The displacement value goes in the otherwise-unused
15387 last word of the second entry. */
15388 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
15389 #else
15390 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
15391 #endif
15392 }
15393 }
15394
15395 /* UnixWare sets the entsize of .plt to 4, although that doesn't
15396 really seem like the right value. */
15397 if (splt->output_section->owner == output_bfd)
15398 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
15399
15400 if (htab->dt_tlsdesc_plt)
15401 {
15402 bfd_vma got_address
15403 = sgot->output_section->vma + sgot->output_offset;
15404 bfd_vma gotplt_address = (htab->root.sgot->output_section->vma
15405 + htab->root.sgot->output_offset);
15406 bfd_vma plt_address
15407 = splt->output_section->vma + splt->output_offset;
15408
15409 arm_put_trampoline (htab, output_bfd,
15410 splt->contents + htab->dt_tlsdesc_plt,
15411 dl_tlsdesc_lazy_trampoline, 6);
15412
15413 bfd_put_32 (output_bfd,
15414 gotplt_address + htab->dt_tlsdesc_got
15415 - (plt_address + htab->dt_tlsdesc_plt)
15416 - dl_tlsdesc_lazy_trampoline[6],
15417 splt->contents + htab->dt_tlsdesc_plt + 24);
15418 bfd_put_32 (output_bfd,
15419 got_address - (plt_address + htab->dt_tlsdesc_plt)
15420 - dl_tlsdesc_lazy_trampoline[7],
15421 splt->contents + htab->dt_tlsdesc_plt + 24 + 4);
15422 }
15423
15424 if (htab->tls_trampoline)
15425 {
15426 arm_put_trampoline (htab, output_bfd,
15427 splt->contents + htab->tls_trampoline,
15428 tls_trampoline, 3);
15429 #ifdef FOUR_WORD_PLT
15430 bfd_put_32 (output_bfd, 0x00000000,
15431 splt->contents + htab->tls_trampoline + 12);
15432 #endif
15433 }
15434
15435 if (htab->vxworks_p
15436 && !bfd_link_pic (info)
15437 && htab->root.splt->size > 0)
15438 {
15439 /* Correct the .rel(a).plt.unloaded relocations. They will have
15440 incorrect symbol indexes. */
15441 int num_plts;
15442 unsigned char *p;
15443
15444 num_plts = ((htab->root.splt->size - htab->plt_header_size)
15445 / htab->plt_entry_size);
15446 p = htab->srelplt2->contents + RELOC_SIZE (htab);
15447
15448 for (; num_plts; num_plts--)
15449 {
15450 Elf_Internal_Rela rel;
15451
15452 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
15453 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
15454 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
15455 p += RELOC_SIZE (htab);
15456
15457 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
15458 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
15459 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
15460 p += RELOC_SIZE (htab);
15461 }
15462 }
15463 }
15464
15465 if (htab->nacl_p && htab->root.iplt != NULL && htab->root.iplt->size > 0)
15466 /* NaCl uses a special first entry in .iplt too. */
15467 arm_nacl_put_plt0 (htab, output_bfd, htab->root.iplt, 0);
15468
15469 /* Fill in the first three entries in the global offset table. */
15470 if (sgot)
15471 {
15472 if (sgot->size > 0)
15473 {
15474 if (sdyn == NULL)
15475 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
15476 else
15477 bfd_put_32 (output_bfd,
15478 sdyn->output_section->vma + sdyn->output_offset,
15479 sgot->contents);
15480 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
15481 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
15482 }
15483
15484 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
15485 }
15486
15487 return TRUE;
15488 }
15489
15490 static void
15491 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
15492 {
15493 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
15494 struct elf32_arm_link_hash_table *globals;
15495 struct elf_segment_map *m;
15496
15497 i_ehdrp = elf_elfheader (abfd);
15498
15499 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
15500 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
15501 else
15502 _bfd_elf_post_process_headers (abfd, link_info);
15503 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
15504
15505 if (link_info)
15506 {
15507 globals = elf32_arm_hash_table (link_info);
15508 if (globals != NULL && globals->byteswap_code)
15509 i_ehdrp->e_flags |= EF_ARM_BE8;
15510 }
15511
15512 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_VER5
15513 && ((i_ehdrp->e_type == ET_DYN) || (i_ehdrp->e_type == ET_EXEC)))
15514 {
15515 int abi = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_ABI_VFP_args);
15516 if (abi == AEABI_VFP_args_vfp)
15517 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_HARD;
15518 else
15519 i_ehdrp->e_flags |= EF_ARM_ABI_FLOAT_SOFT;
15520 }
15521
15522 /* Scan segment to set p_flags attribute if it contains only sections with
15523 SHF_ARM_NOREAD flag. */
15524 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
15525 {
15526 unsigned int j;
15527
15528 if (m->count == 0)
15529 continue;
15530 for (j = 0; j < m->count; j++)
15531 {
15532 if (!(elf_section_flags (m->sections[j]) & SHF_ARM_NOREAD))
15533 break;
15534 }
15535 if (j == m->count)
15536 {
15537 m->p_flags = PF_X;
15538 m->p_flags_valid = 1;
15539 }
15540 }
15541 }
15542
15543 static enum elf_reloc_type_class
15544 elf32_arm_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
15545 const asection *rel_sec ATTRIBUTE_UNUSED,
15546 const Elf_Internal_Rela *rela)
15547 {
15548 switch ((int) ELF32_R_TYPE (rela->r_info))
15549 {
15550 case R_ARM_RELATIVE:
15551 return reloc_class_relative;
15552 case R_ARM_JUMP_SLOT:
15553 return reloc_class_plt;
15554 case R_ARM_COPY:
15555 return reloc_class_copy;
15556 case R_ARM_IRELATIVE:
15557 return reloc_class_ifunc;
15558 default:
15559 return reloc_class_normal;
15560 }
15561 }
15562
15563 static void
15564 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
15565 {
15566 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
15567 }
15568
15569 /* Return TRUE if this is an unwinding table entry. */
15570
15571 static bfd_boolean
15572 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
15573 {
15574 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
15575 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
15576 }
15577
15578
15579 /* Set the type and flags for an ARM section. We do this by
15580 the section name, which is a hack, but ought to work. */
15581
15582 static bfd_boolean
15583 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
15584 {
15585 const char * name;
15586
15587 name = bfd_get_section_name (abfd, sec);
15588
15589 if (is_arm_elf_unwind_section_name (abfd, name))
15590 {
15591 hdr->sh_type = SHT_ARM_EXIDX;
15592 hdr->sh_flags |= SHF_LINK_ORDER;
15593 }
15594
15595 if (sec->flags & SEC_ELF_NOREAD)
15596 hdr->sh_flags |= SHF_ARM_NOREAD;
15597
15598 return TRUE;
15599 }
15600
15601 /* Handle an ARM specific section when reading an object file. This is
15602 called when bfd_section_from_shdr finds a section with an unknown
15603 type. */
15604
15605 static bfd_boolean
15606 elf32_arm_section_from_shdr (bfd *abfd,
15607 Elf_Internal_Shdr * hdr,
15608 const char *name,
15609 int shindex)
15610 {
15611 /* There ought to be a place to keep ELF backend specific flags, but
15612 at the moment there isn't one. We just keep track of the
15613 sections by their name, instead. Fortunately, the ABI gives
15614 names for all the ARM specific sections, so we will probably get
15615 away with this. */
15616 switch (hdr->sh_type)
15617 {
15618 case SHT_ARM_EXIDX:
15619 case SHT_ARM_PREEMPTMAP:
15620 case SHT_ARM_ATTRIBUTES:
15621 break;
15622
15623 default:
15624 return FALSE;
15625 }
15626
15627 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
15628 return FALSE;
15629
15630 return TRUE;
15631 }
15632
15633 static _arm_elf_section_data *
15634 get_arm_elf_section_data (asection * sec)
15635 {
15636 if (sec && sec->owner && is_arm_elf (sec->owner))
15637 return elf32_arm_section_data (sec);
15638 else
15639 return NULL;
15640 }
15641
15642 typedef struct
15643 {
15644 void *flaginfo;
15645 struct bfd_link_info *info;
15646 asection *sec;
15647 int sec_shndx;
15648 int (*func) (void *, const char *, Elf_Internal_Sym *,
15649 asection *, struct elf_link_hash_entry *);
15650 } output_arch_syminfo;
15651
15652 enum map_symbol_type
15653 {
15654 ARM_MAP_ARM,
15655 ARM_MAP_THUMB,
15656 ARM_MAP_DATA
15657 };
15658
15659
15660 /* Output a single mapping symbol. */
15661
15662 static bfd_boolean
15663 elf32_arm_output_map_sym (output_arch_syminfo *osi,
15664 enum map_symbol_type type,
15665 bfd_vma offset)
15666 {
15667 static const char *names[3] = {"$a", "$t", "$d"};
15668 Elf_Internal_Sym sym;
15669
15670 sym.st_value = osi->sec->output_section->vma
15671 + osi->sec->output_offset
15672 + offset;
15673 sym.st_size = 0;
15674 sym.st_other = 0;
15675 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
15676 sym.st_shndx = osi->sec_shndx;
15677 sym.st_target_internal = 0;
15678 elf32_arm_section_map_add (osi->sec, names[type][1], offset);
15679 return osi->func (osi->flaginfo, names[type], &sym, osi->sec, NULL) == 1;
15680 }
15681
15682 /* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT.
15683 IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */
15684
15685 static bfd_boolean
15686 elf32_arm_output_plt_map_1 (output_arch_syminfo *osi,
15687 bfd_boolean is_iplt_entry_p,
15688 union gotplt_union *root_plt,
15689 struct arm_plt_info *arm_plt)
15690 {
15691 struct elf32_arm_link_hash_table *htab;
15692 bfd_vma addr, plt_header_size;
15693
15694 if (root_plt->offset == (bfd_vma) -1)
15695 return TRUE;
15696
15697 htab = elf32_arm_hash_table (osi->info);
15698 if (htab == NULL)
15699 return FALSE;
15700
15701 if (is_iplt_entry_p)
15702 {
15703 osi->sec = htab->root.iplt;
15704 plt_header_size = 0;
15705 }
15706 else
15707 {
15708 osi->sec = htab->root.splt;
15709 plt_header_size = htab->plt_header_size;
15710 }
15711 osi->sec_shndx = (_bfd_elf_section_from_bfd_section
15712 (osi->info->output_bfd, osi->sec->output_section));
15713
15714 addr = root_plt->offset & -2;
15715 if (htab->symbian_p)
15716 {
15717 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
15718 return FALSE;
15719 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
15720 return FALSE;
15721 }
15722 else if (htab->vxworks_p)
15723 {
15724 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
15725 return FALSE;
15726 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
15727 return FALSE;
15728 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
15729 return FALSE;
15730 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
15731 return FALSE;
15732 }
15733 else if (htab->nacl_p)
15734 {
15735 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
15736 return FALSE;
15737 }
15738 else if (using_thumb_only (htab))
15739 {
15740 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
15741 return FALSE;
15742 }
15743 else
15744 {
15745 bfd_boolean thumb_stub_p;
15746
15747 thumb_stub_p = elf32_arm_plt_needs_thumb_stub_p (osi->info, arm_plt);
15748 if (thumb_stub_p)
15749 {
15750 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
15751 return FALSE;
15752 }
15753 #ifdef FOUR_WORD_PLT
15754 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
15755 return FALSE;
15756 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
15757 return FALSE;
15758 #else
15759 /* A three-word PLT with no Thumb thunk contains only Arm code,
15760 so only need to output a mapping symbol for the first PLT entry and
15761 entries with thumb thunks. */
15762 if (thumb_stub_p || addr == plt_header_size)
15763 {
15764 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
15765 return FALSE;
15766 }
15767 #endif
15768 }
15769
15770 return TRUE;
15771 }
15772
15773 /* Output mapping symbols for PLT entries associated with H. */
15774
15775 static bfd_boolean
15776 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
15777 {
15778 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
15779 struct elf32_arm_link_hash_entry *eh;
15780
15781 if (h->root.type == bfd_link_hash_indirect)
15782 return TRUE;
15783
15784 if (h->root.type == bfd_link_hash_warning)
15785 /* When warning symbols are created, they **replace** the "real"
15786 entry in the hash table, thus we never get to see the real
15787 symbol in a hash traversal. So look at it now. */
15788 h = (struct elf_link_hash_entry *) h->root.u.i.link;
15789
15790 eh = (struct elf32_arm_link_hash_entry *) h;
15791 return elf32_arm_output_plt_map_1 (osi, SYMBOL_CALLS_LOCAL (osi->info, h),
15792 &h->plt, &eh->plt);
15793 }
15794
15795 /* Output a single local symbol for a generated stub. */
15796
15797 static bfd_boolean
15798 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
15799 bfd_vma offset, bfd_vma size)
15800 {
15801 Elf_Internal_Sym sym;
15802
15803 sym.st_value = osi->sec->output_section->vma
15804 + osi->sec->output_offset
15805 + offset;
15806 sym.st_size = size;
15807 sym.st_other = 0;
15808 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
15809 sym.st_shndx = osi->sec_shndx;
15810 sym.st_target_internal = 0;
15811 return osi->func (osi->flaginfo, name, &sym, osi->sec, NULL) == 1;
15812 }
15813
15814 static bfd_boolean
15815 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
15816 void * in_arg)
15817 {
15818 struct elf32_arm_stub_hash_entry *stub_entry;
15819 asection *stub_sec;
15820 bfd_vma addr;
15821 char *stub_name;
15822 output_arch_syminfo *osi;
15823 const insn_sequence *template_sequence;
15824 enum stub_insn_type prev_type;
15825 int size;
15826 int i;
15827 enum map_symbol_type sym_type;
15828
15829 /* Massage our args to the form they really have. */
15830 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
15831 osi = (output_arch_syminfo *) in_arg;
15832
15833 stub_sec = stub_entry->stub_sec;
15834
15835 /* Ensure this stub is attached to the current section being
15836 processed. */
15837 if (stub_sec != osi->sec)
15838 return TRUE;
15839
15840 addr = (bfd_vma) stub_entry->stub_offset;
15841 stub_name = stub_entry->output_name;
15842
15843 template_sequence = stub_entry->stub_template;
15844 switch (template_sequence[0].type)
15845 {
15846 case ARM_TYPE:
15847 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, stub_entry->stub_size))
15848 return FALSE;
15849 break;
15850 case THUMB16_TYPE:
15851 case THUMB32_TYPE:
15852 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1,
15853 stub_entry->stub_size))
15854 return FALSE;
15855 break;
15856 default:
15857 BFD_FAIL ();
15858 return 0;
15859 }
15860
15861 prev_type = DATA_TYPE;
15862 size = 0;
15863 for (i = 0; i < stub_entry->stub_template_size; i++)
15864 {
15865 switch (template_sequence[i].type)
15866 {
15867 case ARM_TYPE:
15868 sym_type = ARM_MAP_ARM;
15869 break;
15870
15871 case THUMB16_TYPE:
15872 case THUMB32_TYPE:
15873 sym_type = ARM_MAP_THUMB;
15874 break;
15875
15876 case DATA_TYPE:
15877 sym_type = ARM_MAP_DATA;
15878 break;
15879
15880 default:
15881 BFD_FAIL ();
15882 return FALSE;
15883 }
15884
15885 if (template_sequence[i].type != prev_type)
15886 {
15887 prev_type = template_sequence[i].type;
15888 if (!elf32_arm_output_map_sym (osi, sym_type, addr + size))
15889 return FALSE;
15890 }
15891
15892 switch (template_sequence[i].type)
15893 {
15894 case ARM_TYPE:
15895 case THUMB32_TYPE:
15896 size += 4;
15897 break;
15898
15899 case THUMB16_TYPE:
15900 size += 2;
15901 break;
15902
15903 case DATA_TYPE:
15904 size += 4;
15905 break;
15906
15907 default:
15908 BFD_FAIL ();
15909 return FALSE;
15910 }
15911 }
15912
15913 return TRUE;
15914 }
15915
15916 /* Output mapping symbols for linker generated sections,
15917 and for those data-only sections that do not have a
15918 $d. */
15919
15920 static bfd_boolean
15921 elf32_arm_output_arch_local_syms (bfd *output_bfd,
15922 struct bfd_link_info *info,
15923 void *flaginfo,
15924 int (*func) (void *, const char *,
15925 Elf_Internal_Sym *,
15926 asection *,
15927 struct elf_link_hash_entry *))
15928 {
15929 output_arch_syminfo osi;
15930 struct elf32_arm_link_hash_table *htab;
15931 bfd_vma offset;
15932 bfd_size_type size;
15933 bfd *input_bfd;
15934
15935 htab = elf32_arm_hash_table (info);
15936 if (htab == NULL)
15937 return FALSE;
15938
15939 check_use_blx (htab);
15940
15941 osi.flaginfo = flaginfo;
15942 osi.info = info;
15943 osi.func = func;
15944
15945 /* Add a $d mapping symbol to data-only sections that
15946 don't have any mapping symbol. This may result in (harmless) redundant
15947 mapping symbols. */
15948 for (input_bfd = info->input_bfds;
15949 input_bfd != NULL;
15950 input_bfd = input_bfd->link.next)
15951 {
15952 if ((input_bfd->flags & (BFD_LINKER_CREATED | HAS_SYMS)) == HAS_SYMS)
15953 for (osi.sec = input_bfd->sections;
15954 osi.sec != NULL;
15955 osi.sec = osi.sec->next)
15956 {
15957 if (osi.sec->output_section != NULL
15958 && ((osi.sec->output_section->flags & (SEC_ALLOC | SEC_CODE))
15959 != 0)
15960 && (osi.sec->flags & (SEC_HAS_CONTENTS | SEC_LINKER_CREATED))
15961 == SEC_HAS_CONTENTS
15962 && get_arm_elf_section_data (osi.sec) != NULL
15963 && get_arm_elf_section_data (osi.sec)->mapcount == 0
15964 && osi.sec->size > 0
15965 && (osi.sec->flags & SEC_EXCLUDE) == 0)
15966 {
15967 osi.sec_shndx = _bfd_elf_section_from_bfd_section
15968 (output_bfd, osi.sec->output_section);
15969 if (osi.sec_shndx != (int)SHN_BAD)
15970 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 0);
15971 }
15972 }
15973 }
15974
15975 /* ARM->Thumb glue. */
15976 if (htab->arm_glue_size > 0)
15977 {
15978 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
15979 ARM2THUMB_GLUE_SECTION_NAME);
15980
15981 osi.sec_shndx = _bfd_elf_section_from_bfd_section
15982 (output_bfd, osi.sec->output_section);
15983 if (bfd_link_pic (info) || htab->root.is_relocatable_executable
15984 || htab->pic_veneer)
15985 size = ARM2THUMB_PIC_GLUE_SIZE;
15986 else if (htab->use_blx)
15987 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
15988 else
15989 size = ARM2THUMB_STATIC_GLUE_SIZE;
15990
15991 for (offset = 0; offset < htab->arm_glue_size; offset += size)
15992 {
15993 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
15994 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
15995 }
15996 }
15997
15998 /* Thumb->ARM glue. */
15999 if (htab->thumb_glue_size > 0)
16000 {
16001 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
16002 THUMB2ARM_GLUE_SECTION_NAME);
16003
16004 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16005 (output_bfd, osi.sec->output_section);
16006 size = THUMB2ARM_GLUE_SIZE;
16007
16008 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
16009 {
16010 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
16011 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
16012 }
16013 }
16014
16015 /* ARMv4 BX veneers. */
16016 if (htab->bx_glue_size > 0)
16017 {
16018 osi.sec = bfd_get_linker_section (htab->bfd_of_glue_owner,
16019 ARM_BX_GLUE_SECTION_NAME);
16020
16021 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16022 (output_bfd, osi.sec->output_section);
16023
16024 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
16025 }
16026
16027 /* Long calls stubs. */
16028 if (htab->stub_bfd && htab->stub_bfd->sections)
16029 {
16030 asection* stub_sec;
16031
16032 for (stub_sec = htab->stub_bfd->sections;
16033 stub_sec != NULL;
16034 stub_sec = stub_sec->next)
16035 {
16036 /* Ignore non-stub sections. */
16037 if (!strstr (stub_sec->name, STUB_SUFFIX))
16038 continue;
16039
16040 osi.sec = stub_sec;
16041
16042 osi.sec_shndx = _bfd_elf_section_from_bfd_section
16043 (output_bfd, osi.sec->output_section);
16044
16045 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
16046 }
16047 }
16048
16049 /* Finally, output mapping symbols for the PLT. */
16050 if (htab->root.splt && htab->root.splt->size > 0)
16051 {
16052 osi.sec = htab->root.splt;
16053 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
16054 (output_bfd, osi.sec->output_section));
16055
16056 /* Output mapping symbols for the plt header. SymbianOS does not have a
16057 plt header. */
16058 if (htab->vxworks_p)
16059 {
16060 /* VxWorks shared libraries have no PLT header. */
16061 if (!bfd_link_pic (info))
16062 {
16063 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16064 return FALSE;
16065 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
16066 return FALSE;
16067 }
16068 }
16069 else if (htab->nacl_p)
16070 {
16071 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16072 return FALSE;
16073 }
16074 else if (using_thumb_only (htab))
16075 {
16076 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 0))
16077 return FALSE;
16078 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
16079 return FALSE;
16080 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, 16))
16081 return FALSE;
16082 }
16083 else if (!htab->symbian_p)
16084 {
16085 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16086 return FALSE;
16087 #ifndef FOUR_WORD_PLT
16088 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
16089 return FALSE;
16090 #endif
16091 }
16092 }
16093 if (htab->nacl_p && htab->root.iplt && htab->root.iplt->size > 0)
16094 {
16095 /* NaCl uses a special first entry in .iplt too. */
16096 osi.sec = htab->root.iplt;
16097 osi.sec_shndx = (_bfd_elf_section_from_bfd_section
16098 (output_bfd, osi.sec->output_section));
16099 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
16100 return FALSE;
16101 }
16102 if ((htab->root.splt && htab->root.splt->size > 0)
16103 || (htab->root.iplt && htab->root.iplt->size > 0))
16104 {
16105 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, &osi);
16106 for (input_bfd = info->input_bfds;
16107 input_bfd != NULL;
16108 input_bfd = input_bfd->link.next)
16109 {
16110 struct arm_local_iplt_info **local_iplt;
16111 unsigned int i, num_syms;
16112
16113 local_iplt = elf32_arm_local_iplt (input_bfd);
16114 if (local_iplt != NULL)
16115 {
16116 num_syms = elf_symtab_hdr (input_bfd).sh_info;
16117 for (i = 0; i < num_syms; i++)
16118 if (local_iplt[i] != NULL
16119 && !elf32_arm_output_plt_map_1 (&osi, TRUE,
16120 &local_iplt[i]->root,
16121 &local_iplt[i]->arm))
16122 return FALSE;
16123 }
16124 }
16125 }
16126 if (htab->dt_tlsdesc_plt != 0)
16127 {
16128 /* Mapping symbols for the lazy tls trampoline. */
16129 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->dt_tlsdesc_plt))
16130 return FALSE;
16131
16132 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
16133 htab->dt_tlsdesc_plt + 24))
16134 return FALSE;
16135 }
16136 if (htab->tls_trampoline != 0)
16137 {
16138 /* Mapping symbols for the tls trampoline. */
16139 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, htab->tls_trampoline))
16140 return FALSE;
16141 #ifdef FOUR_WORD_PLT
16142 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA,
16143 htab->tls_trampoline + 12))
16144 return FALSE;
16145 #endif
16146 }
16147
16148 return TRUE;
16149 }
16150
16151 /* Allocate target specific section data. */
16152
16153 static bfd_boolean
16154 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
16155 {
16156 if (!sec->used_by_bfd)
16157 {
16158 _arm_elf_section_data *sdata;
16159 bfd_size_type amt = sizeof (*sdata);
16160
16161 sdata = (_arm_elf_section_data *) bfd_zalloc (abfd, amt);
16162 if (sdata == NULL)
16163 return FALSE;
16164 sec->used_by_bfd = sdata;
16165 }
16166
16167 return _bfd_elf_new_section_hook (abfd, sec);
16168 }
16169
16170
16171 /* Used to order a list of mapping symbols by address. */
16172
16173 static int
16174 elf32_arm_compare_mapping (const void * a, const void * b)
16175 {
16176 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
16177 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
16178
16179 if (amap->vma > bmap->vma)
16180 return 1;
16181 else if (amap->vma < bmap->vma)
16182 return -1;
16183 else if (amap->type > bmap->type)
16184 /* Ensure results do not depend on the host qsort for objects with
16185 multiple mapping symbols at the same address by sorting on type
16186 after vma. */
16187 return 1;
16188 else if (amap->type < bmap->type)
16189 return -1;
16190 else
16191 return 0;
16192 }
16193
16194 /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */
16195
16196 static unsigned long
16197 offset_prel31 (unsigned long addr, bfd_vma offset)
16198 {
16199 return (addr & ~0x7ffffffful) | ((addr + offset) & 0x7ffffffful);
16200 }
16201
16202 /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31
16203 relocations. */
16204
16205 static void
16206 copy_exidx_entry (bfd *output_bfd, bfd_byte *to, bfd_byte *from, bfd_vma offset)
16207 {
16208 unsigned long first_word = bfd_get_32 (output_bfd, from);
16209 unsigned long second_word = bfd_get_32 (output_bfd, from + 4);
16210
16211 /* High bit of first word is supposed to be zero. */
16212 if ((first_word & 0x80000000ul) == 0)
16213 first_word = offset_prel31 (first_word, offset);
16214
16215 /* If the high bit of the first word is clear, and the bit pattern is not 0x1
16216 (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */
16217 if ((second_word != 0x1) && ((second_word & 0x80000000ul) == 0))
16218 second_word = offset_prel31 (second_word, offset);
16219
16220 bfd_put_32 (output_bfd, first_word, to);
16221 bfd_put_32 (output_bfd, second_word, to + 4);
16222 }
16223
16224 /* Data for make_branch_to_a8_stub(). */
16225
16226 struct a8_branch_to_stub_data
16227 {
16228 asection *writing_section;
16229 bfd_byte *contents;
16230 };
16231
16232
16233 /* Helper to insert branches to Cortex-A8 erratum stubs in the right
16234 places for a particular section. */
16235
16236 static bfd_boolean
16237 make_branch_to_a8_stub (struct bfd_hash_entry *gen_entry,
16238 void *in_arg)
16239 {
16240 struct elf32_arm_stub_hash_entry *stub_entry;
16241 struct a8_branch_to_stub_data *data;
16242 bfd_byte *contents;
16243 unsigned long branch_insn;
16244 bfd_vma veneered_insn_loc, veneer_entry_loc;
16245 bfd_signed_vma branch_offset;
16246 bfd *abfd;
16247 unsigned int target;
16248
16249 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
16250 data = (struct a8_branch_to_stub_data *) in_arg;
16251
16252 if (stub_entry->target_section != data->writing_section
16253 || stub_entry->stub_type < arm_stub_a8_veneer_lwm)
16254 return TRUE;
16255
16256 contents = data->contents;
16257
16258 veneered_insn_loc = stub_entry->target_section->output_section->vma
16259 + stub_entry->target_section->output_offset
16260 + stub_entry->target_value;
16261
16262 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
16263 + stub_entry->stub_sec->output_offset
16264 + stub_entry->stub_offset;
16265
16266 if (stub_entry->stub_type == arm_stub_a8_veneer_blx)
16267 veneered_insn_loc &= ~3u;
16268
16269 branch_offset = veneer_entry_loc - veneered_insn_loc - 4;
16270
16271 abfd = stub_entry->target_section->owner;
16272 target = stub_entry->target_value;
16273
16274 /* We attempt to avoid this condition by setting stubs_always_after_branch
16275 in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround.
16276 This check is just to be on the safe side... */
16277 if ((veneered_insn_loc & ~0xfff) == (veneer_entry_loc & ~0xfff))
16278 {
16279 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub is "
16280 "allocated in unsafe location"), abfd);
16281 return FALSE;
16282 }
16283
16284 switch (stub_entry->stub_type)
16285 {
16286 case arm_stub_a8_veneer_b:
16287 case arm_stub_a8_veneer_b_cond:
16288 branch_insn = 0xf0009000;
16289 goto jump24;
16290
16291 case arm_stub_a8_veneer_blx:
16292 branch_insn = 0xf000e800;
16293 goto jump24;
16294
16295 case arm_stub_a8_veneer_bl:
16296 {
16297 unsigned int i1, j1, i2, j2, s;
16298
16299 branch_insn = 0xf000d000;
16300
16301 jump24:
16302 if (branch_offset < -16777216 || branch_offset > 16777214)
16303 {
16304 /* There's not much we can do apart from complain if this
16305 happens. */
16306 (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub out "
16307 "of range (input file too large)"), abfd);
16308 return FALSE;
16309 }
16310
16311 /* i1 = not(j1 eor s), so:
16312 not i1 = j1 eor s
16313 j1 = (not i1) eor s. */
16314
16315 branch_insn |= (branch_offset >> 1) & 0x7ff;
16316 branch_insn |= ((branch_offset >> 12) & 0x3ff) << 16;
16317 i2 = (branch_offset >> 22) & 1;
16318 i1 = (branch_offset >> 23) & 1;
16319 s = (branch_offset >> 24) & 1;
16320 j1 = (!i1) ^ s;
16321 j2 = (!i2) ^ s;
16322 branch_insn |= j2 << 11;
16323 branch_insn |= j1 << 13;
16324 branch_insn |= s << 26;
16325 }
16326 break;
16327
16328 default:
16329 BFD_FAIL ();
16330 return FALSE;
16331 }
16332
16333 bfd_put_16 (abfd, (branch_insn >> 16) & 0xffff, &contents[target]);
16334 bfd_put_16 (abfd, branch_insn & 0xffff, &contents[target + 2]);
16335
16336 return TRUE;
16337 }
16338
16339 /* Beginning of stm32l4xx work-around. */
16340
16341 /* Functions encoding instructions necessary for the emission of the
16342 fix-stm32l4xx-629360.
16343 Encoding is extracted from the
16344 ARM (C) Architecture Reference Manual
16345 ARMv7-A and ARMv7-R edition
16346 ARM DDI 0406C.b (ID072512). */
16347
16348 static inline bfd_vma
16349 create_instruction_branch_absolute (int branch_offset)
16350 {
16351 /* A8.8.18 B (A8-334)
16352 B target_address (Encoding T4). */
16353 /* 1111 - 0Sii - iiii - iiii - 10J1 - Jiii - iiii - iiii. */
16354 /* jump offset is: S:I1:I2:imm10:imm11:0. */
16355 /* with : I1 = NOT (J1 EOR S) I2 = NOT (J2 EOR S). */
16356
16357 int s = ((branch_offset & 0x1000000) >> 24);
16358 int j1 = s ^ !((branch_offset & 0x800000) >> 23);
16359 int j2 = s ^ !((branch_offset & 0x400000) >> 22);
16360
16361 if (branch_offset < -(1 << 24) || branch_offset >= (1 << 24))
16362 BFD_ASSERT (0 && "Error: branch out of range. Cannot create branch.");
16363
16364 bfd_vma patched_inst = 0xf0009000
16365 | s << 26 /* S. */
16366 | (((unsigned long) (branch_offset) >> 12) & 0x3ff) << 16 /* imm10. */
16367 | j1 << 13 /* J1. */
16368 | j2 << 11 /* J2. */
16369 | (((unsigned long) (branch_offset) >> 1) & 0x7ff); /* imm11. */
16370
16371 return patched_inst;
16372 }
16373
16374 static inline bfd_vma
16375 create_instruction_ldmia (int base_reg, int wback, int reg_mask)
16376 {
16377 /* A8.8.57 LDM/LDMIA/LDMFD (A8-396)
16378 LDMIA Rn!, {Ra, Rb, Rc, ...} (Encoding T2). */
16379 bfd_vma patched_inst = 0xe8900000
16380 | (/*W=*/wback << 21)
16381 | (base_reg << 16)
16382 | (reg_mask & 0x0000ffff);
16383
16384 return patched_inst;
16385 }
16386
16387 static inline bfd_vma
16388 create_instruction_ldmdb (int base_reg, int wback, int reg_mask)
16389 {
16390 /* A8.8.60 LDMDB/LDMEA (A8-402)
16391 LDMDB Rn!, {Ra, Rb, Rc, ...} (Encoding T1). */
16392 bfd_vma patched_inst = 0xe9100000
16393 | (/*W=*/wback << 21)
16394 | (base_reg << 16)
16395 | (reg_mask & 0x0000ffff);
16396
16397 return patched_inst;
16398 }
16399
16400 static inline bfd_vma
16401 create_instruction_mov (int target_reg, int source_reg)
16402 {
16403 /* A8.8.103 MOV (register) (A8-486)
16404 MOV Rd, Rm (Encoding T1). */
16405 bfd_vma patched_inst = 0x4600
16406 | (target_reg & 0x7)
16407 | ((target_reg & 0x8) >> 3) << 7
16408 | (source_reg << 3);
16409
16410 return patched_inst;
16411 }
16412
16413 static inline bfd_vma
16414 create_instruction_sub (int target_reg, int source_reg, int value)
16415 {
16416 /* A8.8.221 SUB (immediate) (A8-708)
16417 SUB Rd, Rn, #value (Encoding T3). */
16418 bfd_vma patched_inst = 0xf1a00000
16419 | (target_reg << 8)
16420 | (source_reg << 16)
16421 | (/*S=*/0 << 20)
16422 | ((value & 0x800) >> 11) << 26
16423 | ((value & 0x700) >> 8) << 12
16424 | (value & 0x0ff);
16425
16426 return patched_inst;
16427 }
16428
16429 static inline bfd_vma
16430 create_instruction_vldmia (int base_reg, int wback, int num_regs,
16431 int first_reg)
16432 {
16433 /* A8.8.332 VLDM (A8-922)
16434 VLMD{MODE} Rn{!}, {list} (Encoding T2). */
16435 bfd_vma patched_inst = 0xec900a00
16436 | (/*W=*/wback << 21)
16437 | (base_reg << 16)
16438 | (num_regs & 0x000000ff)
16439 | (((unsigned)first_reg>>1) & 0x0000000f) << 12
16440 | (first_reg & 0x00000001) << 22;
16441
16442 return patched_inst;
16443 }
16444
16445 static inline bfd_vma
16446 create_instruction_vldmdb (int base_reg, int num_regs, int first_reg)
16447 {
16448 /* A8.8.332 VLDM (A8-922)
16449 VLMD{MODE} Rn!, {} (Encoding T2). */
16450 bfd_vma patched_inst = 0xed300a00
16451 | (base_reg << 16)
16452 | (num_regs & 0x000000ff)
16453 | (((unsigned)first_reg>>1) & 0x0000000f) << 12
16454 | (first_reg & 0x00000001) << 22;
16455
16456 return patched_inst;
16457 }
16458
16459 static inline bfd_vma
16460 create_instruction_udf_w (int value)
16461 {
16462 /* A8.8.247 UDF (A8-758)
16463 Undefined (Encoding T2). */
16464 bfd_vma patched_inst = 0xf7f0a000
16465 | (value & 0x00000fff)
16466 | (value & 0x000f0000) << 16;
16467
16468 return patched_inst;
16469 }
16470
16471 static inline bfd_vma
16472 create_instruction_udf (int value)
16473 {
16474 /* A8.8.247 UDF (A8-758)
16475 Undefined (Encoding T1). */
16476 bfd_vma patched_inst = 0xde00
16477 | (value & 0xff);
16478
16479 return patched_inst;
16480 }
16481
16482 /* Functions writing an instruction in memory, returning the next
16483 memory position to write to. */
16484
16485 static inline bfd_byte *
16486 push_thumb2_insn32 (struct elf32_arm_link_hash_table * htab,
16487 bfd * output_bfd, bfd_byte *pt, insn32 insn)
16488 {
16489 put_thumb2_insn (htab, output_bfd, insn, pt);
16490 return pt + 4;
16491 }
16492
16493 static inline bfd_byte *
16494 push_thumb2_insn16 (struct elf32_arm_link_hash_table * htab,
16495 bfd * output_bfd, bfd_byte *pt, insn32 insn)
16496 {
16497 put_thumb_insn (htab, output_bfd, insn, pt);
16498 return pt + 2;
16499 }
16500
16501 /* Function filling up a region in memory with T1 and T2 UDFs taking
16502 care of alignment. */
16503
16504 static bfd_byte *
16505 stm32l4xx_fill_stub_udf (struct elf32_arm_link_hash_table * htab,
16506 bfd * output_bfd,
16507 const bfd_byte * const base_stub_contents,
16508 bfd_byte * const from_stub_contents,
16509 const bfd_byte * const end_stub_contents)
16510 {
16511 bfd_byte *current_stub_contents = from_stub_contents;
16512
16513 /* Fill the remaining of the stub with deterministic contents : UDF
16514 instructions.
16515 Check if realignment is needed on modulo 4 frontier using T1, to
16516 further use T2. */
16517 if ((current_stub_contents < end_stub_contents)
16518 && !((current_stub_contents - base_stub_contents) % 2)
16519 && ((current_stub_contents - base_stub_contents) % 4))
16520 current_stub_contents =
16521 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
16522 create_instruction_udf (0));
16523
16524 for (; current_stub_contents < end_stub_contents;)
16525 current_stub_contents =
16526 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16527 create_instruction_udf_w (0));
16528
16529 return current_stub_contents;
16530 }
16531
16532 /* Functions writing the stream of instructions equivalent to the
16533 derived sequence for ldmia, ldmdb, vldm respectively. */
16534
16535 static void
16536 stm32l4xx_create_replacing_stub_ldmia (struct elf32_arm_link_hash_table * htab,
16537 bfd * output_bfd,
16538 const insn32 initial_insn,
16539 const bfd_byte *const initial_insn_addr,
16540 bfd_byte *const base_stub_contents)
16541 {
16542 int wback = (initial_insn & 0x00200000) >> 21;
16543 int ri, rn = (initial_insn & 0x000F0000) >> 16;
16544 int insn_all_registers = initial_insn & 0x0000ffff;
16545 int insn_low_registers, insn_high_registers;
16546 int usable_register_mask;
16547 int nb_registers = popcount (insn_all_registers);
16548 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
16549 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
16550 bfd_byte *current_stub_contents = base_stub_contents;
16551
16552 BFD_ASSERT (is_thumb2_ldmia (initial_insn));
16553
16554 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
16555 smaller than 8 registers load sequences that do not cause the
16556 hardware issue. */
16557 if (nb_registers <= 8)
16558 {
16559 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
16560 current_stub_contents =
16561 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16562 initial_insn);
16563
16564 /* B initial_insn_addr+4. */
16565 if (!restore_pc)
16566 current_stub_contents =
16567 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16568 create_instruction_branch_absolute
16569 (initial_insn_addr - current_stub_contents));
16570
16571
16572 /* Fill the remaining of the stub with deterministic contents. */
16573 current_stub_contents =
16574 stm32l4xx_fill_stub_udf (htab, output_bfd,
16575 base_stub_contents, current_stub_contents,
16576 base_stub_contents +
16577 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
16578
16579 return;
16580 }
16581
16582 /* - reg_list[13] == 0. */
16583 BFD_ASSERT ((insn_all_registers & (1 << 13))==0);
16584
16585 /* - reg_list[14] & reg_list[15] != 1. */
16586 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
16587
16588 /* - if (wback==1) reg_list[rn] == 0. */
16589 BFD_ASSERT (!wback || !restore_rn);
16590
16591 /* - nb_registers > 8. */
16592 BFD_ASSERT (popcount (insn_all_registers) > 8);
16593
16594 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
16595
16596 /* In the following algorithm, we split this wide LDM using 2 LDM insns:
16597 - One with the 7 lowest registers (register mask 0x007F)
16598 This LDM will finally contain between 2 and 7 registers
16599 - One with the 7 highest registers (register mask 0xDF80)
16600 This ldm will finally contain between 2 and 7 registers. */
16601 insn_low_registers = insn_all_registers & 0x007F;
16602 insn_high_registers = insn_all_registers & 0xDF80;
16603
16604 /* A spare register may be needed during this veneer to temporarily
16605 handle the base register. This register will be restored with the
16606 last LDM operation.
16607 The usable register may be any general purpose register (that
16608 excludes PC, SP, LR : register mask is 0x1FFF). */
16609 usable_register_mask = 0x1FFF;
16610
16611 /* Generate the stub function. */
16612 if (wback)
16613 {
16614 /* LDMIA Rn!, {R-low-register-list} : (Encoding T2). */
16615 current_stub_contents =
16616 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16617 create_instruction_ldmia
16618 (rn, /*wback=*/1, insn_low_registers));
16619
16620 /* LDMIA Rn!, {R-high-register-list} : (Encoding T2). */
16621 current_stub_contents =
16622 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16623 create_instruction_ldmia
16624 (rn, /*wback=*/1, insn_high_registers));
16625 if (!restore_pc)
16626 {
16627 /* B initial_insn_addr+4. */
16628 current_stub_contents =
16629 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16630 create_instruction_branch_absolute
16631 (initial_insn_addr - current_stub_contents));
16632 }
16633 }
16634 else /* if (!wback). */
16635 {
16636 ri = rn;
16637
16638 /* If Rn is not part of the high-register-list, move it there. */
16639 if (!(insn_high_registers & (1 << rn)))
16640 {
16641 /* Choose a Ri in the high-register-list that will be restored. */
16642 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
16643
16644 /* MOV Ri, Rn. */
16645 current_stub_contents =
16646 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
16647 create_instruction_mov (ri, rn));
16648 }
16649
16650 /* LDMIA Ri!, {R-low-register-list} : (Encoding T2). */
16651 current_stub_contents =
16652 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16653 create_instruction_ldmia
16654 (ri, /*wback=*/1, insn_low_registers));
16655
16656 /* LDMIA Ri, {R-high-register-list} : (Encoding T2). */
16657 current_stub_contents =
16658 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16659 create_instruction_ldmia
16660 (ri, /*wback=*/0, insn_high_registers));
16661
16662 if (!restore_pc)
16663 {
16664 /* B initial_insn_addr+4. */
16665 current_stub_contents =
16666 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16667 create_instruction_branch_absolute
16668 (initial_insn_addr - current_stub_contents));
16669 }
16670 }
16671
16672 /* Fill the remaining of the stub with deterministic contents. */
16673 current_stub_contents =
16674 stm32l4xx_fill_stub_udf (htab, output_bfd,
16675 base_stub_contents, current_stub_contents,
16676 base_stub_contents +
16677 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
16678 }
16679
16680 static void
16681 stm32l4xx_create_replacing_stub_ldmdb (struct elf32_arm_link_hash_table * htab,
16682 bfd * output_bfd,
16683 const insn32 initial_insn,
16684 const bfd_byte *const initial_insn_addr,
16685 bfd_byte *const base_stub_contents)
16686 {
16687 int wback = (initial_insn & 0x00200000) >> 21;
16688 int ri, rn = (initial_insn & 0x000f0000) >> 16;
16689 int insn_all_registers = initial_insn & 0x0000ffff;
16690 int insn_low_registers, insn_high_registers;
16691 int usable_register_mask;
16692 int restore_pc = (insn_all_registers & (1 << 15)) ? 1 : 0;
16693 int restore_rn = (insn_all_registers & (1 << rn)) ? 1 : 0;
16694 int nb_registers = popcount (insn_all_registers);
16695 bfd_byte *current_stub_contents = base_stub_contents;
16696
16697 BFD_ASSERT (is_thumb2_ldmdb (initial_insn));
16698
16699 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
16700 smaller than 8 registers load sequences that do not cause the
16701 hardware issue. */
16702 if (nb_registers <= 8)
16703 {
16704 /* UNTOUCHED : LDMIA Rn{!}, {R-all-register-list}. */
16705 current_stub_contents =
16706 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16707 initial_insn);
16708
16709 /* B initial_insn_addr+4. */
16710 current_stub_contents =
16711 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16712 create_instruction_branch_absolute
16713 (initial_insn_addr - current_stub_contents));
16714
16715 /* Fill the remaining of the stub with deterministic contents. */
16716 current_stub_contents =
16717 stm32l4xx_fill_stub_udf (htab, output_bfd,
16718 base_stub_contents, current_stub_contents,
16719 base_stub_contents +
16720 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
16721
16722 return;
16723 }
16724
16725 /* - reg_list[13] == 0. */
16726 BFD_ASSERT ((insn_all_registers & (1 << 13)) == 0);
16727
16728 /* - reg_list[14] & reg_list[15] != 1. */
16729 BFD_ASSERT ((insn_all_registers & 0xC000) != 0xC000);
16730
16731 /* - if (wback==1) reg_list[rn] == 0. */
16732 BFD_ASSERT (!wback || !restore_rn);
16733
16734 /* - nb_registers > 8. */
16735 BFD_ASSERT (popcount (insn_all_registers) > 8);
16736
16737 /* At this point, LDMxx initial insn loads between 9 and 14 registers. */
16738
16739 /* In the following algorithm, we split this wide LDM using 2 LDM insn:
16740 - One with the 7 lowest registers (register mask 0x007F)
16741 This LDM will finally contain between 2 and 7 registers
16742 - One with the 7 highest registers (register mask 0xDF80)
16743 This ldm will finally contain between 2 and 7 registers. */
16744 insn_low_registers = insn_all_registers & 0x007F;
16745 insn_high_registers = insn_all_registers & 0xDF80;
16746
16747 /* A spare register may be needed during this veneer to temporarily
16748 handle the base register. This register will be restored with
16749 the last LDM operation.
16750 The usable register may be any general purpose register (that excludes
16751 PC, SP, LR : register mask is 0x1FFF). */
16752 usable_register_mask = 0x1FFF;
16753
16754 /* Generate the stub function. */
16755 if (!wback && !restore_pc && !restore_rn)
16756 {
16757 /* Choose a Ri in the low-register-list that will be restored. */
16758 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
16759
16760 /* MOV Ri, Rn. */
16761 current_stub_contents =
16762 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
16763 create_instruction_mov (ri, rn));
16764
16765 /* LDMDB Ri!, {R-high-register-list}. */
16766 current_stub_contents =
16767 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16768 create_instruction_ldmdb
16769 (ri, /*wback=*/1, insn_high_registers));
16770
16771 /* LDMDB Ri, {R-low-register-list}. */
16772 current_stub_contents =
16773 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16774 create_instruction_ldmdb
16775 (ri, /*wback=*/0, insn_low_registers));
16776
16777 /* B initial_insn_addr+4. */
16778 current_stub_contents =
16779 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16780 create_instruction_branch_absolute
16781 (initial_insn_addr - current_stub_contents));
16782 }
16783 else if (wback && !restore_pc && !restore_rn)
16784 {
16785 /* LDMDB Rn!, {R-high-register-list}. */
16786 current_stub_contents =
16787 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16788 create_instruction_ldmdb
16789 (rn, /*wback=*/1, insn_high_registers));
16790
16791 /* LDMDB Rn!, {R-low-register-list}. */
16792 current_stub_contents =
16793 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16794 create_instruction_ldmdb
16795 (rn, /*wback=*/1, insn_low_registers));
16796
16797 /* B initial_insn_addr+4. */
16798 current_stub_contents =
16799 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16800 create_instruction_branch_absolute
16801 (initial_insn_addr - current_stub_contents));
16802 }
16803 else if (!wback && restore_pc && !restore_rn)
16804 {
16805 /* Choose a Ri in the high-register-list that will be restored. */
16806 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
16807
16808 /* SUB Ri, Rn, #(4*nb_registers). */
16809 current_stub_contents =
16810 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16811 create_instruction_sub (ri, rn, (4 * nb_registers)));
16812
16813 /* LDMIA Ri!, {R-low-register-list}. */
16814 current_stub_contents =
16815 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16816 create_instruction_ldmia
16817 (ri, /*wback=*/1, insn_low_registers));
16818
16819 /* LDMIA Ri, {R-high-register-list}. */
16820 current_stub_contents =
16821 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16822 create_instruction_ldmia
16823 (ri, /*wback=*/0, insn_high_registers));
16824 }
16825 else if (wback && restore_pc && !restore_rn)
16826 {
16827 /* Choose a Ri in the high-register-list that will be restored. */
16828 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
16829
16830 /* SUB Rn, Rn, #(4*nb_registers) */
16831 current_stub_contents =
16832 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16833 create_instruction_sub (rn, rn, (4 * nb_registers)));
16834
16835 /* MOV Ri, Rn. */
16836 current_stub_contents =
16837 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
16838 create_instruction_mov (ri, rn));
16839
16840 /* LDMIA Ri!, {R-low-register-list}. */
16841 current_stub_contents =
16842 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16843 create_instruction_ldmia
16844 (ri, /*wback=*/1, insn_low_registers));
16845
16846 /* LDMIA Ri, {R-high-register-list}. */
16847 current_stub_contents =
16848 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16849 create_instruction_ldmia
16850 (ri, /*wback=*/0, insn_high_registers));
16851 }
16852 else if (!wback && !restore_pc && restore_rn)
16853 {
16854 ri = rn;
16855 if (!(insn_low_registers & (1 << rn)))
16856 {
16857 /* Choose a Ri in the low-register-list that will be restored. */
16858 ri = ctz (insn_low_registers & usable_register_mask & ~(1 << rn));
16859
16860 /* MOV Ri, Rn. */
16861 current_stub_contents =
16862 push_thumb2_insn16 (htab, output_bfd, current_stub_contents,
16863 create_instruction_mov (ri, rn));
16864 }
16865
16866 /* LDMDB Ri!, {R-high-register-list}. */
16867 current_stub_contents =
16868 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16869 create_instruction_ldmdb
16870 (ri, /*wback=*/1, insn_high_registers));
16871
16872 /* LDMDB Ri, {R-low-register-list}. */
16873 current_stub_contents =
16874 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16875 create_instruction_ldmdb
16876 (ri, /*wback=*/0, insn_low_registers));
16877
16878 /* B initial_insn_addr+4. */
16879 current_stub_contents =
16880 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16881 create_instruction_branch_absolute
16882 (initial_insn_addr - current_stub_contents));
16883 }
16884 else if (!wback && restore_pc && restore_rn)
16885 {
16886 ri = rn;
16887 if (!(insn_high_registers & (1 << rn)))
16888 {
16889 /* Choose a Ri in the high-register-list that will be restored. */
16890 ri = ctz (insn_high_registers & usable_register_mask & ~(1 << rn));
16891 }
16892
16893 /* SUB Ri, Rn, #(4*nb_registers). */
16894 current_stub_contents =
16895 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16896 create_instruction_sub (ri, rn, (4 * nb_registers)));
16897
16898 /* LDMIA Ri!, {R-low-register-list}. */
16899 current_stub_contents =
16900 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16901 create_instruction_ldmia
16902 (ri, /*wback=*/1, insn_low_registers));
16903
16904 /* LDMIA Ri, {R-high-register-list}. */
16905 current_stub_contents =
16906 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16907 create_instruction_ldmia
16908 (ri, /*wback=*/0, insn_high_registers));
16909 }
16910 else if (wback && restore_rn)
16911 {
16912 /* The assembler should not have accepted to encode this. */
16913 BFD_ASSERT (0 && "Cannot patch an instruction that has an "
16914 "undefined behavior.\n");
16915 }
16916
16917 /* Fill the remaining of the stub with deterministic contents. */
16918 current_stub_contents =
16919 stm32l4xx_fill_stub_udf (htab, output_bfd,
16920 base_stub_contents, current_stub_contents,
16921 base_stub_contents +
16922 STM32L4XX_ERRATUM_LDM_VENEER_SIZE);
16923
16924 }
16925
16926 static void
16927 stm32l4xx_create_replacing_stub_vldm (struct elf32_arm_link_hash_table * htab,
16928 bfd * output_bfd,
16929 const insn32 initial_insn,
16930 const bfd_byte *const initial_insn_addr,
16931 bfd_byte *const base_stub_contents)
16932 {
16933 int num_regs = ((unsigned int)initial_insn << 24) >> 24;
16934 bfd_byte *current_stub_contents = base_stub_contents;
16935
16936 BFD_ASSERT (is_thumb2_vldm (initial_insn));
16937
16938 /* In BFD_ARM_STM32L4XX_FIX_ALL mode we may have to deal with
16939 smaller than 8 registers load sequences that do not cause the
16940 hardware issue. */
16941 if (num_regs <= 8)
16942 {
16943 /* Untouched instruction. */
16944 current_stub_contents =
16945 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16946 initial_insn);
16947
16948 /* B initial_insn_addr+4. */
16949 current_stub_contents =
16950 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16951 create_instruction_branch_absolute
16952 (initial_insn_addr - current_stub_contents));
16953 }
16954 else
16955 {
16956 bfd_boolean is_ia_nobang = /* (IA without !). */
16957 (((initial_insn << 7) >> 28) & 0xd) == 0x4;
16958 bfd_boolean is_ia_bang = /* (IA with !) - includes VPOP. */
16959 (((initial_insn << 7) >> 28) & 0xd) == 0x5;
16960 bfd_boolean is_db_bang = /* (DB with !). */
16961 (((initial_insn << 7) >> 28) & 0xd) == 0x9;
16962 int base_reg = ((unsigned int)initial_insn << 12) >> 28;
16963 /* d = UInt (Vd:D);. */
16964 int first_reg = ((((unsigned int)initial_insn << 16) >> 28) << 1)
16965 | (((unsigned int)initial_insn << 9) >> 31);
16966
16967 /* Compute the number of 8-register chunks needed to split. */
16968 int chunks = (num_regs%8) ? (num_regs/8 + 1) : (num_regs/8);
16969 int chunk;
16970
16971 /* The test coverage has been done assuming the following
16972 hypothesis that exactly one of the previous is_ predicates is
16973 true. */
16974 BFD_ASSERT ((is_ia_nobang ^ is_ia_bang ^ is_db_bang) &&
16975 !(is_ia_nobang & is_ia_bang & is_db_bang));
16976
16977 /* We treat the cutting of the register in one pass for all
16978 cases, then we emit the adjustments:
16979
16980 vldm rx, {...}
16981 -> vldm rx!, {8_words_or_less} for each needed 8_word
16982 -> sub rx, rx, #size (list)
16983
16984 vldm rx!, {...}
16985 -> vldm rx!, {8_words_or_less} for each needed 8_word
16986 This also handles vpop instruction (when rx is sp)
16987
16988 vldmd rx!, {...}
16989 -> vldmb rx!, {8_words_or_less} for each needed 8_word. */
16990 for (chunk = 0; chunk<chunks; ++chunk)
16991 {
16992 if (is_ia_nobang || is_ia_bang)
16993 {
16994 current_stub_contents =
16995 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
16996 create_instruction_vldmia
16997 (base_reg,
16998 /*wback= . */1,
16999 chunks - (chunk + 1) ?
17000 8 : num_regs - chunk * 8,
17001 first_reg + chunk * 8));
17002 }
17003 else if (is_db_bang)
17004 {
17005 current_stub_contents =
17006 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17007 create_instruction_vldmdb
17008 (base_reg,
17009 chunks - (chunk + 1) ?
17010 8 : num_regs - chunk * 8,
17011 first_reg + chunk * 8));
17012 }
17013 }
17014
17015 /* Only this case requires the base register compensation
17016 subtract. */
17017 if (is_ia_nobang)
17018 {
17019 current_stub_contents =
17020 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17021 create_instruction_sub
17022 (base_reg, base_reg, 4*num_regs));
17023 }
17024
17025 /* B initial_insn_addr+4. */
17026 current_stub_contents =
17027 push_thumb2_insn32 (htab, output_bfd, current_stub_contents,
17028 create_instruction_branch_absolute
17029 (initial_insn_addr - current_stub_contents));
17030 }
17031
17032 /* Fill the remaining of the stub with deterministic contents. */
17033 current_stub_contents =
17034 stm32l4xx_fill_stub_udf (htab, output_bfd,
17035 base_stub_contents, current_stub_contents,
17036 base_stub_contents +
17037 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE);
17038 }
17039
17040 static void
17041 stm32l4xx_create_replacing_stub (struct elf32_arm_link_hash_table * htab,
17042 bfd * output_bfd,
17043 const insn32 wrong_insn,
17044 const bfd_byte *const wrong_insn_addr,
17045 bfd_byte *const stub_contents)
17046 {
17047 if (is_thumb2_ldmia (wrong_insn))
17048 stm32l4xx_create_replacing_stub_ldmia (htab, output_bfd,
17049 wrong_insn, wrong_insn_addr,
17050 stub_contents);
17051 else if (is_thumb2_ldmdb (wrong_insn))
17052 stm32l4xx_create_replacing_stub_ldmdb (htab, output_bfd,
17053 wrong_insn, wrong_insn_addr,
17054 stub_contents);
17055 else if (is_thumb2_vldm (wrong_insn))
17056 stm32l4xx_create_replacing_stub_vldm (htab, output_bfd,
17057 wrong_insn, wrong_insn_addr,
17058 stub_contents);
17059 }
17060
17061 /* End of stm32l4xx work-around. */
17062
17063
17064 static void
17065 elf32_arm_add_relocation (bfd *output_bfd, struct bfd_link_info *info,
17066 asection *output_sec, Elf_Internal_Rela *rel)
17067 {
17068 BFD_ASSERT (output_sec && rel);
17069 struct bfd_elf_section_reloc_data *output_reldata;
17070 struct elf32_arm_link_hash_table *htab;
17071 struct bfd_elf_section_data *oesd = elf_section_data (output_sec);
17072 Elf_Internal_Shdr *rel_hdr;
17073
17074
17075 if (oesd->rel.hdr)
17076 {
17077 rel_hdr = oesd->rel.hdr;
17078 output_reldata = &(oesd->rel);
17079 }
17080 else if (oesd->rela.hdr)
17081 {
17082 rel_hdr = oesd->rela.hdr;
17083 output_reldata = &(oesd->rela);
17084 }
17085 else
17086 {
17087 abort ();
17088 }
17089
17090 bfd_byte *erel = rel_hdr->contents;
17091 erel += output_reldata->count * rel_hdr->sh_entsize;
17092 htab = elf32_arm_hash_table (info);
17093 SWAP_RELOC_OUT (htab) (output_bfd, rel, erel);
17094 output_reldata->count++;
17095 }
17096
17097 /* Do code byteswapping. Return FALSE afterwards so that the section is
17098 written out as normal. */
17099
17100 static bfd_boolean
17101 elf32_arm_write_section (bfd *output_bfd,
17102 struct bfd_link_info *link_info,
17103 asection *sec,
17104 bfd_byte *contents)
17105 {
17106 unsigned int mapcount, errcount;
17107 _arm_elf_section_data *arm_data;
17108 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
17109 elf32_arm_section_map *map;
17110 elf32_vfp11_erratum_list *errnode;
17111 elf32_stm32l4xx_erratum_list *stm32l4xx_errnode;
17112 bfd_vma ptr;
17113 bfd_vma end;
17114 bfd_vma offset = sec->output_section->vma + sec->output_offset;
17115 bfd_byte tmp;
17116 unsigned int i;
17117
17118 if (globals == NULL)
17119 return FALSE;
17120
17121 /* If this section has not been allocated an _arm_elf_section_data
17122 structure then we cannot record anything. */
17123 arm_data = get_arm_elf_section_data (sec);
17124 if (arm_data == NULL)
17125 return FALSE;
17126
17127 mapcount = arm_data->mapcount;
17128 map = arm_data->map;
17129 errcount = arm_data->erratumcount;
17130
17131 if (errcount != 0)
17132 {
17133 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
17134
17135 for (errnode = arm_data->erratumlist; errnode != 0;
17136 errnode = errnode->next)
17137 {
17138 bfd_vma target = errnode->vma - offset;
17139
17140 switch (errnode->type)
17141 {
17142 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
17143 {
17144 bfd_vma branch_to_veneer;
17145 /* Original condition code of instruction, plus bit mask for
17146 ARM B instruction. */
17147 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
17148 | 0x0a000000;
17149
17150 /* The instruction is before the label. */
17151 target -= 4;
17152
17153 /* Above offset included in -4 below. */
17154 branch_to_veneer = errnode->u.b.veneer->vma
17155 - errnode->vma - 4;
17156
17157 if ((signed) branch_to_veneer < -(1 << 25)
17158 || (signed) branch_to_veneer >= (1 << 25))
17159 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
17160 "range"), output_bfd);
17161
17162 insn |= (branch_to_veneer >> 2) & 0xffffff;
17163 contents[endianflip ^ target] = insn & 0xff;
17164 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
17165 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
17166 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
17167 }
17168 break;
17169
17170 case VFP11_ERRATUM_ARM_VENEER:
17171 {
17172 bfd_vma branch_from_veneer;
17173 unsigned int insn;
17174
17175 /* Take size of veneer into account. */
17176 branch_from_veneer = errnode->u.v.branch->vma
17177 - errnode->vma - 12;
17178
17179 if ((signed) branch_from_veneer < -(1 << 25)
17180 || (signed) branch_from_veneer >= (1 << 25))
17181 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
17182 "range"), output_bfd);
17183
17184 /* Original instruction. */
17185 insn = errnode->u.v.branch->u.b.vfp_insn;
17186 contents[endianflip ^ target] = insn & 0xff;
17187 contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff;
17188 contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff;
17189 contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff;
17190
17191 /* Branch back to insn after original insn. */
17192 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
17193 contents[endianflip ^ (target + 4)] = insn & 0xff;
17194 contents[endianflip ^ (target + 5)] = (insn >> 8) & 0xff;
17195 contents[endianflip ^ (target + 6)] = (insn >> 16) & 0xff;
17196 contents[endianflip ^ (target + 7)] = (insn >> 24) & 0xff;
17197 }
17198 break;
17199
17200 default:
17201 abort ();
17202 }
17203 }
17204 }
17205
17206 if (arm_data->stm32l4xx_erratumcount != 0)
17207 {
17208 for (stm32l4xx_errnode = arm_data->stm32l4xx_erratumlist;
17209 stm32l4xx_errnode != 0;
17210 stm32l4xx_errnode = stm32l4xx_errnode->next)
17211 {
17212 bfd_vma target = stm32l4xx_errnode->vma - offset;
17213
17214 switch (stm32l4xx_errnode->type)
17215 {
17216 case STM32L4XX_ERRATUM_BRANCH_TO_VENEER:
17217 {
17218 unsigned int insn;
17219 bfd_vma branch_to_veneer =
17220 stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma;
17221
17222 if ((signed) branch_to_veneer < -(1 << 24)
17223 || (signed) branch_to_veneer >= (1 << 24))
17224 {
17225 bfd_vma out_of_range =
17226 ((signed) branch_to_veneer < -(1 << 24)) ?
17227 - branch_to_veneer - (1 << 24) :
17228 ((signed) branch_to_veneer >= (1 << 24)) ?
17229 branch_to_veneer - (1 << 24) : 0;
17230
17231 (*_bfd_error_handler)
17232 (_("%B(%#x): error: Cannot create STM32L4XX veneer. "
17233 "Jump out of range by %ld bytes. "
17234 "Cannot encode branch instruction. "),
17235 output_bfd,
17236 (long) (stm32l4xx_errnode->vma - 4),
17237 out_of_range);
17238 continue;
17239 }
17240
17241 insn = create_instruction_branch_absolute
17242 (stm32l4xx_errnode->u.b.veneer->vma - stm32l4xx_errnode->vma);
17243
17244 /* The instruction is before the label. */
17245 target -= 4;
17246
17247 put_thumb2_insn (globals, output_bfd,
17248 (bfd_vma) insn, contents + target);
17249 }
17250 break;
17251
17252 case STM32L4XX_ERRATUM_VENEER:
17253 {
17254 bfd_byte * veneer;
17255 bfd_byte * veneer_r;
17256 unsigned int insn;
17257
17258 veneer = contents + target;
17259 veneer_r = veneer
17260 + stm32l4xx_errnode->u.b.veneer->vma
17261 - stm32l4xx_errnode->vma - 4;
17262
17263 if ((signed) (veneer_r - veneer -
17264 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE >
17265 STM32L4XX_ERRATUM_LDM_VENEER_SIZE ?
17266 STM32L4XX_ERRATUM_VLDM_VENEER_SIZE :
17267 STM32L4XX_ERRATUM_LDM_VENEER_SIZE) < -(1 << 24)
17268 || (signed) (veneer_r - veneer) >= (1 << 24))
17269 {
17270 (*_bfd_error_handler) (_("%B: error: Cannot create STM32L4XX "
17271 "veneer."), output_bfd);
17272 continue;
17273 }
17274
17275 /* Original instruction. */
17276 insn = stm32l4xx_errnode->u.v.branch->u.b.insn;
17277
17278 stm32l4xx_create_replacing_stub
17279 (globals, output_bfd, insn, (void*)veneer_r, (void*)veneer);
17280 }
17281 break;
17282
17283 default:
17284 abort ();
17285 }
17286 }
17287 }
17288
17289 if (arm_data->elf.this_hdr.sh_type == SHT_ARM_EXIDX)
17290 {
17291 arm_unwind_table_edit *edit_node
17292 = arm_data->u.exidx.unwind_edit_list;
17293 /* Now, sec->size is the size of the section we will write. The original
17294 size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND
17295 markers) was sec->rawsize. (This isn't the case if we perform no
17296 edits, then rawsize will be zero and we should use size). */
17297 bfd_byte *edited_contents = (bfd_byte *) bfd_malloc (sec->size);
17298 unsigned int input_size = sec->rawsize ? sec->rawsize : sec->size;
17299 unsigned int in_index, out_index;
17300 bfd_vma add_to_offsets = 0;
17301
17302 for (in_index = 0, out_index = 0; in_index * 8 < input_size || edit_node;)
17303 {
17304 if (edit_node)
17305 {
17306 unsigned int edit_index = edit_node->index;
17307
17308 if (in_index < edit_index && in_index * 8 < input_size)
17309 {
17310 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
17311 contents + in_index * 8, add_to_offsets);
17312 out_index++;
17313 in_index++;
17314 }
17315 else if (in_index == edit_index
17316 || (in_index * 8 >= input_size
17317 && edit_index == UINT_MAX))
17318 {
17319 switch (edit_node->type)
17320 {
17321 case DELETE_EXIDX_ENTRY:
17322 in_index++;
17323 add_to_offsets += 8;
17324 break;
17325
17326 case INSERT_EXIDX_CANTUNWIND_AT_END:
17327 {
17328 asection *text_sec = edit_node->linked_section;
17329 bfd_vma text_offset = text_sec->output_section->vma
17330 + text_sec->output_offset
17331 + text_sec->size;
17332 bfd_vma exidx_offset = offset + out_index * 8;
17333 unsigned long prel31_offset;
17334
17335 /* Note: this is meant to be equivalent to an
17336 R_ARM_PREL31 relocation. These synthetic
17337 EXIDX_CANTUNWIND markers are not relocated by the
17338 usual BFD method. */
17339 prel31_offset = (text_offset - exidx_offset)
17340 & 0x7ffffffful;
17341 if (bfd_link_relocatable (link_info))
17342 {
17343 /* Here relocation for new EXIDX_CANTUNWIND is
17344 created, so there is no need to
17345 adjust offset by hand. */
17346 prel31_offset = text_sec->output_offset
17347 + text_sec->size;
17348
17349 /* New relocation entity. */
17350 asection *text_out = text_sec->output_section;
17351 Elf_Internal_Rela rel;
17352 rel.r_addend = 0;
17353 rel.r_offset = exidx_offset;
17354 rel.r_info = ELF32_R_INFO (text_out->target_index,
17355 R_ARM_PREL31);
17356
17357 elf32_arm_add_relocation (output_bfd, link_info,
17358 sec->output_section,
17359 &rel);
17360 }
17361
17362 /* First address we can't unwind. */
17363 bfd_put_32 (output_bfd, prel31_offset,
17364 &edited_contents[out_index * 8]);
17365
17366 /* Code for EXIDX_CANTUNWIND. */
17367 bfd_put_32 (output_bfd, 0x1,
17368 &edited_contents[out_index * 8 + 4]);
17369
17370 out_index++;
17371 add_to_offsets -= 8;
17372 }
17373 break;
17374 }
17375
17376 edit_node = edit_node->next;
17377 }
17378 }
17379 else
17380 {
17381 /* No more edits, copy remaining entries verbatim. */
17382 copy_exidx_entry (output_bfd, edited_contents + out_index * 8,
17383 contents + in_index * 8, add_to_offsets);
17384 out_index++;
17385 in_index++;
17386 }
17387 }
17388
17389 if (!(sec->flags & SEC_EXCLUDE) && !(sec->flags & SEC_NEVER_LOAD))
17390 bfd_set_section_contents (output_bfd, sec->output_section,
17391 edited_contents,
17392 (file_ptr) sec->output_offset, sec->size);
17393
17394 return TRUE;
17395 }
17396
17397 /* Fix code to point to Cortex-A8 erratum stubs. */
17398 if (globals->fix_cortex_a8)
17399 {
17400 struct a8_branch_to_stub_data data;
17401
17402 data.writing_section = sec;
17403 data.contents = contents;
17404
17405 bfd_hash_traverse (& globals->stub_hash_table, make_branch_to_a8_stub,
17406 & data);
17407 }
17408
17409 if (mapcount == 0)
17410 return FALSE;
17411
17412 if (globals->byteswap_code)
17413 {
17414 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
17415
17416 ptr = map[0].vma;
17417 for (i = 0; i < mapcount; i++)
17418 {
17419 if (i == mapcount - 1)
17420 end = sec->size;
17421 else
17422 end = map[i + 1].vma;
17423
17424 switch (map[i].type)
17425 {
17426 case 'a':
17427 /* Byte swap code words. */
17428 while (ptr + 3 < end)
17429 {
17430 tmp = contents[ptr];
17431 contents[ptr] = contents[ptr + 3];
17432 contents[ptr + 3] = tmp;
17433 tmp = contents[ptr + 1];
17434 contents[ptr + 1] = contents[ptr + 2];
17435 contents[ptr + 2] = tmp;
17436 ptr += 4;
17437 }
17438 break;
17439
17440 case 't':
17441 /* Byte swap code halfwords. */
17442 while (ptr + 1 < end)
17443 {
17444 tmp = contents[ptr];
17445 contents[ptr] = contents[ptr + 1];
17446 contents[ptr + 1] = tmp;
17447 ptr += 2;
17448 }
17449 break;
17450
17451 case 'd':
17452 /* Leave data alone. */
17453 break;
17454 }
17455 ptr = end;
17456 }
17457 }
17458
17459 free (map);
17460 arm_data->mapcount = -1;
17461 arm_data->mapsize = 0;
17462 arm_data->map = NULL;
17463
17464 return FALSE;
17465 }
17466
17467 /* Mangle thumb function symbols as we read them in. */
17468
17469 static bfd_boolean
17470 elf32_arm_swap_symbol_in (bfd * abfd,
17471 const void *psrc,
17472 const void *pshn,
17473 Elf_Internal_Sym *dst)
17474 {
17475 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
17476 return FALSE;
17477
17478 /* New EABI objects mark thumb function symbols by setting the low bit of
17479 the address. */
17480 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
17481 || ELF_ST_TYPE (dst->st_info) == STT_GNU_IFUNC)
17482 {
17483 if (dst->st_value & 1)
17484 {
17485 dst->st_value &= ~(bfd_vma) 1;
17486 dst->st_target_internal = ST_BRANCH_TO_THUMB;
17487 }
17488 else
17489 dst->st_target_internal = ST_BRANCH_TO_ARM;
17490 }
17491 else if (ELF_ST_TYPE (dst->st_info) == STT_ARM_TFUNC)
17492 {
17493 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_FUNC);
17494 dst->st_target_internal = ST_BRANCH_TO_THUMB;
17495 }
17496 else if (ELF_ST_TYPE (dst->st_info) == STT_SECTION)
17497 dst->st_target_internal = ST_BRANCH_LONG;
17498 else
17499 dst->st_target_internal = ST_BRANCH_UNKNOWN;
17500
17501 return TRUE;
17502 }
17503
17504
17505 /* Mangle thumb function symbols as we write them out. */
17506
17507 static void
17508 elf32_arm_swap_symbol_out (bfd *abfd,
17509 const Elf_Internal_Sym *src,
17510 void *cdst,
17511 void *shndx)
17512 {
17513 Elf_Internal_Sym newsym;
17514
17515 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
17516 of the address set, as per the new EABI. We do this unconditionally
17517 because objcopy does not set the elf header flags until after
17518 it writes out the symbol table. */
17519 if (src->st_target_internal == ST_BRANCH_TO_THUMB)
17520 {
17521 newsym = *src;
17522 if (ELF_ST_TYPE (src->st_info) != STT_GNU_IFUNC)
17523 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
17524 if (newsym.st_shndx != SHN_UNDEF)
17525 {
17526 /* Do this only for defined symbols. At link type, the static
17527 linker will simulate the work of dynamic linker of resolving
17528 symbols and will carry over the thumbness of found symbols to
17529 the output symbol table. It's not clear how it happens, but
17530 the thumbness of undefined symbols can well be different at
17531 runtime, and writing '1' for them will be confusing for users
17532 and possibly for dynamic linker itself.
17533 */
17534 newsym.st_value |= 1;
17535 }
17536
17537 src = &newsym;
17538 }
17539 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
17540 }
17541
17542 /* Add the PT_ARM_EXIDX program header. */
17543
17544 static bfd_boolean
17545 elf32_arm_modify_segment_map (bfd *abfd,
17546 struct bfd_link_info *info ATTRIBUTE_UNUSED)
17547 {
17548 struct elf_segment_map *m;
17549 asection *sec;
17550
17551 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
17552 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
17553 {
17554 /* If there is already a PT_ARM_EXIDX header, then we do not
17555 want to add another one. This situation arises when running
17556 "strip"; the input binary already has the header. */
17557 m = elf_seg_map (abfd);
17558 while (m && m->p_type != PT_ARM_EXIDX)
17559 m = m->next;
17560 if (!m)
17561 {
17562 m = (struct elf_segment_map *)
17563 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
17564 if (m == NULL)
17565 return FALSE;
17566 m->p_type = PT_ARM_EXIDX;
17567 m->count = 1;
17568 m->sections[0] = sec;
17569
17570 m->next = elf_seg_map (abfd);
17571 elf_seg_map (abfd) = m;
17572 }
17573 }
17574
17575 return TRUE;
17576 }
17577
17578 /* We may add a PT_ARM_EXIDX program header. */
17579
17580 static int
17581 elf32_arm_additional_program_headers (bfd *abfd,
17582 struct bfd_link_info *info ATTRIBUTE_UNUSED)
17583 {
17584 asection *sec;
17585
17586 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
17587 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
17588 return 1;
17589 else
17590 return 0;
17591 }
17592
17593 /* Hook called by the linker routine which adds symbols from an object
17594 file. */
17595
17596 static bfd_boolean
17597 elf32_arm_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
17598 Elf_Internal_Sym *sym, const char **namep,
17599 flagword *flagsp, asection **secp, bfd_vma *valp)
17600 {
17601 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
17602 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
17603 && (abfd->flags & DYNAMIC) == 0
17604 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
17605 elf_tdata (info->output_bfd)->has_gnu_symbols = elf_gnu_symbol_any;
17606
17607 if (elf32_arm_hash_table (info) == NULL)
17608 return FALSE;
17609
17610 if (elf32_arm_hash_table (info)->vxworks_p
17611 && !elf_vxworks_add_symbol_hook (abfd, info, sym, namep,
17612 flagsp, secp, valp))
17613 return FALSE;
17614
17615 return TRUE;
17616 }
17617
17618 /* We use this to override swap_symbol_in and swap_symbol_out. */
17619 const struct elf_size_info elf32_arm_size_info =
17620 {
17621 sizeof (Elf32_External_Ehdr),
17622 sizeof (Elf32_External_Phdr),
17623 sizeof (Elf32_External_Shdr),
17624 sizeof (Elf32_External_Rel),
17625 sizeof (Elf32_External_Rela),
17626 sizeof (Elf32_External_Sym),
17627 sizeof (Elf32_External_Dyn),
17628 sizeof (Elf_External_Note),
17629 4,
17630 1,
17631 32, 2,
17632 ELFCLASS32, EV_CURRENT,
17633 bfd_elf32_write_out_phdrs,
17634 bfd_elf32_write_shdrs_and_ehdr,
17635 bfd_elf32_checksum_contents,
17636 bfd_elf32_write_relocs,
17637 elf32_arm_swap_symbol_in,
17638 elf32_arm_swap_symbol_out,
17639 bfd_elf32_slurp_reloc_table,
17640 bfd_elf32_slurp_symbol_table,
17641 bfd_elf32_swap_dyn_in,
17642 bfd_elf32_swap_dyn_out,
17643 bfd_elf32_swap_reloc_in,
17644 bfd_elf32_swap_reloc_out,
17645 bfd_elf32_swap_reloca_in,
17646 bfd_elf32_swap_reloca_out
17647 };
17648
17649 static bfd_vma
17650 read_code32 (const bfd *abfd, const bfd_byte *addr)
17651 {
17652 /* V7 BE8 code is always little endian. */
17653 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
17654 return bfd_getl32 (addr);
17655
17656 return bfd_get_32 (abfd, addr);
17657 }
17658
17659 static bfd_vma
17660 read_code16 (const bfd *abfd, const bfd_byte *addr)
17661 {
17662 /* V7 BE8 code is always little endian. */
17663 if ((elf_elfheader (abfd)->e_flags & EF_ARM_BE8) != 0)
17664 return bfd_getl16 (addr);
17665
17666 return bfd_get_16 (abfd, addr);
17667 }
17668
17669 /* Return size of plt0 entry starting at ADDR
17670 or (bfd_vma) -1 if size can not be determined. */
17671
17672 static bfd_vma
17673 elf32_arm_plt0_size (const bfd *abfd, const bfd_byte *addr)
17674 {
17675 bfd_vma first_word;
17676 bfd_vma plt0_size;
17677
17678 first_word = read_code32 (abfd, addr);
17679
17680 if (first_word == elf32_arm_plt0_entry[0])
17681 plt0_size = 4 * ARRAY_SIZE (elf32_arm_plt0_entry);
17682 else if (first_word == elf32_thumb2_plt0_entry[0])
17683 plt0_size = 4 * ARRAY_SIZE (elf32_thumb2_plt0_entry);
17684 else
17685 /* We don't yet handle this PLT format. */
17686 return (bfd_vma) -1;
17687
17688 return plt0_size;
17689 }
17690
17691 /* Return size of plt entry starting at offset OFFSET
17692 of plt section located at address START
17693 or (bfd_vma) -1 if size can not be determined. */
17694
17695 static bfd_vma
17696 elf32_arm_plt_size (const bfd *abfd, const bfd_byte *start, bfd_vma offset)
17697 {
17698 bfd_vma first_insn;
17699 bfd_vma plt_size = 0;
17700 const bfd_byte *addr = start + offset;
17701
17702 /* PLT entry size if fixed on Thumb-only platforms. */
17703 if (read_code32 (abfd, start) == elf32_thumb2_plt0_entry[0])
17704 return 4 * ARRAY_SIZE (elf32_thumb2_plt_entry);
17705
17706 /* Respect Thumb stub if necessary. */
17707 if (read_code16 (abfd, addr) == elf32_arm_plt_thumb_stub[0])
17708 {
17709 plt_size += 2 * ARRAY_SIZE(elf32_arm_plt_thumb_stub);
17710 }
17711
17712 /* Strip immediate from first add. */
17713 first_insn = read_code32 (abfd, addr + plt_size) & 0xffffff00;
17714
17715 #ifdef FOUR_WORD_PLT
17716 if (first_insn == elf32_arm_plt_entry[0])
17717 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry);
17718 #else
17719 if (first_insn == elf32_arm_plt_entry_long[0])
17720 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_long);
17721 else if (first_insn == elf32_arm_plt_entry_short[0])
17722 plt_size += 4 * ARRAY_SIZE (elf32_arm_plt_entry_short);
17723 #endif
17724 else
17725 /* We don't yet handle this PLT format. */
17726 return (bfd_vma) -1;
17727
17728 return plt_size;
17729 }
17730
17731 /* Implementation is shamelessly borrowed from _bfd_elf_get_synthetic_symtab. */
17732
17733 static long
17734 elf32_arm_get_synthetic_symtab (bfd *abfd,
17735 long symcount ATTRIBUTE_UNUSED,
17736 asymbol **syms ATTRIBUTE_UNUSED,
17737 long dynsymcount,
17738 asymbol **dynsyms,
17739 asymbol **ret)
17740 {
17741 asection *relplt;
17742 asymbol *s;
17743 arelent *p;
17744 long count, i, n;
17745 size_t size;
17746 Elf_Internal_Shdr *hdr;
17747 char *names;
17748 asection *plt;
17749 bfd_vma offset;
17750 bfd_byte *data;
17751
17752 *ret = NULL;
17753
17754 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
17755 return 0;
17756
17757 if (dynsymcount <= 0)
17758 return 0;
17759
17760 relplt = bfd_get_section_by_name (abfd, ".rel.plt");
17761 if (relplt == NULL)
17762 return 0;
17763
17764 hdr = &elf_section_data (relplt)->this_hdr;
17765 if (hdr->sh_link != elf_dynsymtab (abfd)
17766 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
17767 return 0;
17768
17769 plt = bfd_get_section_by_name (abfd, ".plt");
17770 if (plt == NULL)
17771 return 0;
17772
17773 if (!elf32_arm_size_info.slurp_reloc_table (abfd, relplt, dynsyms, TRUE))
17774 return -1;
17775
17776 data = plt->contents;
17777 if (data == NULL)
17778 {
17779 if (!bfd_get_full_section_contents(abfd, (asection *) plt, &data) || data == NULL)
17780 return -1;
17781 bfd_cache_section_contents((asection *) plt, data);
17782 }
17783
17784 count = relplt->size / hdr->sh_entsize;
17785 size = count * sizeof (asymbol);
17786 p = relplt->relocation;
17787 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
17788 {
17789 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
17790 if (p->addend != 0)
17791 size += sizeof ("+0x") - 1 + 8;
17792 }
17793
17794 s = *ret = (asymbol *) bfd_malloc (size);
17795 if (s == NULL)
17796 return -1;
17797
17798 offset = elf32_arm_plt0_size (abfd, data);
17799 if (offset == (bfd_vma) -1)
17800 return -1;
17801
17802 names = (char *) (s + count);
17803 p = relplt->relocation;
17804 n = 0;
17805 for (i = 0; i < count; i++, p += elf32_arm_size_info.int_rels_per_ext_rel)
17806 {
17807 size_t len;
17808
17809 bfd_vma plt_size = elf32_arm_plt_size (abfd, data, offset);
17810 if (plt_size == (bfd_vma) -1)
17811 break;
17812
17813 *s = **p->sym_ptr_ptr;
17814 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
17815 we are defining a symbol, ensure one of them is set. */
17816 if ((s->flags & BSF_LOCAL) == 0)
17817 s->flags |= BSF_GLOBAL;
17818 s->flags |= BSF_SYNTHETIC;
17819 s->section = plt;
17820 s->value = offset;
17821 s->name = names;
17822 s->udata.p = NULL;
17823 len = strlen ((*p->sym_ptr_ptr)->name);
17824 memcpy (names, (*p->sym_ptr_ptr)->name, len);
17825 names += len;
17826 if (p->addend != 0)
17827 {
17828 char buf[30], *a;
17829
17830 memcpy (names, "+0x", sizeof ("+0x") - 1);
17831 names += sizeof ("+0x") - 1;
17832 bfd_sprintf_vma (abfd, buf, p->addend);
17833 for (a = buf; *a == '0'; ++a)
17834 ;
17835 len = strlen (a);
17836 memcpy (names, a, len);
17837 names += len;
17838 }
17839 memcpy (names, "@plt", sizeof ("@plt"));
17840 names += sizeof ("@plt");
17841 ++s, ++n;
17842 offset += plt_size;
17843 }
17844
17845 return n;
17846 }
17847
17848 static bfd_boolean
17849 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr * hdr)
17850 {
17851 if (hdr->sh_flags & SHF_ARM_NOREAD)
17852 *flags |= SEC_ELF_NOREAD;
17853 return TRUE;
17854 }
17855
17856 static flagword
17857 elf32_arm_lookup_section_flags (char *flag_name)
17858 {
17859 if (!strcmp (flag_name, "SHF_ARM_NOREAD"))
17860 return SHF_ARM_NOREAD;
17861
17862 return SEC_NO_FLAGS;
17863 }
17864
17865 static unsigned int
17866 elf32_arm_count_additional_relocs (asection *sec)
17867 {
17868 struct _arm_elf_section_data *arm_data;
17869 arm_data = get_arm_elf_section_data (sec);
17870 return arm_data->additional_reloc_count;
17871 }
17872
17873 #define ELF_ARCH bfd_arch_arm
17874 #define ELF_TARGET_ID ARM_ELF_DATA
17875 #define ELF_MACHINE_CODE EM_ARM
17876 #ifdef __QNXTARGET__
17877 #define ELF_MAXPAGESIZE 0x1000
17878 #else
17879 #define ELF_MAXPAGESIZE 0x10000
17880 #endif
17881 #define ELF_MINPAGESIZE 0x1000
17882 #define ELF_COMMONPAGESIZE 0x1000
17883
17884 #define bfd_elf32_mkobject elf32_arm_mkobject
17885
17886 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
17887 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
17888 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
17889 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
17890 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
17891 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
17892 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
17893 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
17894 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
17895 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
17896 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
17897 #define bfd_elf32_bfd_final_link elf32_arm_final_link
17898 #define bfd_elf32_get_synthetic_symtab elf32_arm_get_synthetic_symtab
17899
17900 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
17901 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
17902 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
17903 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
17904 #define elf_backend_check_relocs elf32_arm_check_relocs
17905 #define elf_backend_relocate_section elf32_arm_relocate_section
17906 #define elf_backend_write_section elf32_arm_write_section
17907 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
17908 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
17909 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
17910 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
17911 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
17912 #define elf_backend_always_size_sections elf32_arm_always_size_sections
17913 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
17914 #define elf_backend_post_process_headers elf32_arm_post_process_headers
17915 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
17916 #define elf_backend_object_p elf32_arm_object_p
17917 #define elf_backend_fake_sections elf32_arm_fake_sections
17918 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
17919 #define elf_backend_final_write_processing elf32_arm_final_write_processing
17920 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
17921 #define elf_backend_size_info elf32_arm_size_info
17922 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
17923 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
17924 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
17925 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
17926 #define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook
17927 #define elf_backend_count_additional_relocs elf32_arm_count_additional_relocs
17928
17929 #define elf_backend_can_refcount 1
17930 #define elf_backend_can_gc_sections 1
17931 #define elf_backend_plt_readonly 1
17932 #define elf_backend_want_got_plt 1
17933 #define elf_backend_want_plt_sym 0
17934 #define elf_backend_may_use_rel_p 1
17935 #define elf_backend_may_use_rela_p 0
17936 #define elf_backend_default_use_rela_p 0
17937
17938 #define elf_backend_got_header_size 12
17939 #define elf_backend_extern_protected_data 1
17940
17941 #undef elf_backend_obj_attrs_vendor
17942 #define elf_backend_obj_attrs_vendor "aeabi"
17943 #undef elf_backend_obj_attrs_section
17944 #define elf_backend_obj_attrs_section ".ARM.attributes"
17945 #undef elf_backend_obj_attrs_arg_type
17946 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
17947 #undef elf_backend_obj_attrs_section_type
17948 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
17949 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
17950 #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
17951
17952 #undef elf_backend_section_flags
17953 #define elf_backend_section_flags elf32_arm_section_flags
17954 #undef elf_backend_lookup_section_flags_hook
17955 #define elf_backend_lookup_section_flags_hook elf32_arm_lookup_section_flags
17956
17957 #include "elf32-target.h"
17958
17959 /* Native Client targets. */
17960
17961 #undef TARGET_LITTLE_SYM
17962 #define TARGET_LITTLE_SYM arm_elf32_nacl_le_vec
17963 #undef TARGET_LITTLE_NAME
17964 #define TARGET_LITTLE_NAME "elf32-littlearm-nacl"
17965 #undef TARGET_BIG_SYM
17966 #define TARGET_BIG_SYM arm_elf32_nacl_be_vec
17967 #undef TARGET_BIG_NAME
17968 #define TARGET_BIG_NAME "elf32-bigarm-nacl"
17969
17970 /* Like elf32_arm_link_hash_table_create -- but overrides
17971 appropriately for NaCl. */
17972
17973 static struct bfd_link_hash_table *
17974 elf32_arm_nacl_link_hash_table_create (bfd *abfd)
17975 {
17976 struct bfd_link_hash_table *ret;
17977
17978 ret = elf32_arm_link_hash_table_create (abfd);
17979 if (ret)
17980 {
17981 struct elf32_arm_link_hash_table *htab
17982 = (struct elf32_arm_link_hash_table *) ret;
17983
17984 htab->nacl_p = 1;
17985
17986 htab->plt_header_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt0_entry);
17987 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_nacl_plt_entry);
17988 }
17989 return ret;
17990 }
17991
17992 /* Since NaCl doesn't use the ARM-specific unwind format, we don't
17993 really need to use elf32_arm_modify_segment_map. But we do it
17994 anyway just to reduce gratuitous differences with the stock ARM backend. */
17995
17996 static bfd_boolean
17997 elf32_arm_nacl_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
17998 {
17999 return (elf32_arm_modify_segment_map (abfd, info)
18000 && nacl_modify_segment_map (abfd, info));
18001 }
18002
18003 static void
18004 elf32_arm_nacl_final_write_processing (bfd *abfd, bfd_boolean linker)
18005 {
18006 elf32_arm_final_write_processing (abfd, linker);
18007 nacl_final_write_processing (abfd, linker);
18008 }
18009
18010 static bfd_vma
18011 elf32_arm_nacl_plt_sym_val (bfd_vma i, const asection *plt,
18012 const arelent *rel ATTRIBUTE_UNUSED)
18013 {
18014 return plt->vma
18015 + 4 * (ARRAY_SIZE (elf32_arm_nacl_plt0_entry) +
18016 i * ARRAY_SIZE (elf32_arm_nacl_plt_entry));
18017 }
18018
18019 #undef elf32_bed
18020 #define elf32_bed elf32_arm_nacl_bed
18021 #undef bfd_elf32_bfd_link_hash_table_create
18022 #define bfd_elf32_bfd_link_hash_table_create \
18023 elf32_arm_nacl_link_hash_table_create
18024 #undef elf_backend_plt_alignment
18025 #define elf_backend_plt_alignment 4
18026 #undef elf_backend_modify_segment_map
18027 #define elf_backend_modify_segment_map elf32_arm_nacl_modify_segment_map
18028 #undef elf_backend_modify_program_headers
18029 #define elf_backend_modify_program_headers nacl_modify_program_headers
18030 #undef elf_backend_final_write_processing
18031 #define elf_backend_final_write_processing elf32_arm_nacl_final_write_processing
18032 #undef bfd_elf32_get_synthetic_symtab
18033 #undef elf_backend_plt_sym_val
18034 #define elf_backend_plt_sym_val elf32_arm_nacl_plt_sym_val
18035
18036 #undef ELF_MINPAGESIZE
18037 #undef ELF_COMMONPAGESIZE
18038
18039
18040 #include "elf32-target.h"
18041
18042 /* Reset to defaults. */
18043 #undef elf_backend_plt_alignment
18044 #undef elf_backend_modify_segment_map
18045 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
18046 #undef elf_backend_modify_program_headers
18047 #undef elf_backend_final_write_processing
18048 #define elf_backend_final_write_processing elf32_arm_final_write_processing
18049 #undef ELF_MINPAGESIZE
18050 #define ELF_MINPAGESIZE 0x1000
18051 #undef ELF_COMMONPAGESIZE
18052 #define ELF_COMMONPAGESIZE 0x1000
18053
18054
18055 /* VxWorks Targets. */
18056
18057 #undef TARGET_LITTLE_SYM
18058 #define TARGET_LITTLE_SYM arm_elf32_vxworks_le_vec
18059 #undef TARGET_LITTLE_NAME
18060 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
18061 #undef TARGET_BIG_SYM
18062 #define TARGET_BIG_SYM arm_elf32_vxworks_be_vec
18063 #undef TARGET_BIG_NAME
18064 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
18065
18066 /* Like elf32_arm_link_hash_table_create -- but overrides
18067 appropriately for VxWorks. */
18068
18069 static struct bfd_link_hash_table *
18070 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
18071 {
18072 struct bfd_link_hash_table *ret;
18073
18074 ret = elf32_arm_link_hash_table_create (abfd);
18075 if (ret)
18076 {
18077 struct elf32_arm_link_hash_table *htab
18078 = (struct elf32_arm_link_hash_table *) ret;
18079 htab->use_rel = 0;
18080 htab->vxworks_p = 1;
18081 }
18082 return ret;
18083 }
18084
18085 static void
18086 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
18087 {
18088 elf32_arm_final_write_processing (abfd, linker);
18089 elf_vxworks_final_write_processing (abfd, linker);
18090 }
18091
18092 #undef elf32_bed
18093 #define elf32_bed elf32_arm_vxworks_bed
18094
18095 #undef bfd_elf32_bfd_link_hash_table_create
18096 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
18097 #undef elf_backend_final_write_processing
18098 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
18099 #undef elf_backend_emit_relocs
18100 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
18101
18102 #undef elf_backend_may_use_rel_p
18103 #define elf_backend_may_use_rel_p 0
18104 #undef elf_backend_may_use_rela_p
18105 #define elf_backend_may_use_rela_p 1
18106 #undef elf_backend_default_use_rela_p
18107 #define elf_backend_default_use_rela_p 1
18108 #undef elf_backend_want_plt_sym
18109 #define elf_backend_want_plt_sym 1
18110 #undef ELF_MAXPAGESIZE
18111 #define ELF_MAXPAGESIZE 0x1000
18112
18113 #include "elf32-target.h"
18114
18115
18116 /* Merge backend specific data from an object file to the output
18117 object file when linking. */
18118
18119 static bfd_boolean
18120 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
18121 {
18122 flagword out_flags;
18123 flagword in_flags;
18124 bfd_boolean flags_compatible = TRUE;
18125 asection *sec;
18126
18127 /* Check if we have the same endianness. */
18128 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
18129 return FALSE;
18130
18131 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
18132 return TRUE;
18133
18134 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
18135 return FALSE;
18136
18137 /* The input BFD must have had its flags initialised. */
18138 /* The following seems bogus to me -- The flags are initialized in
18139 the assembler but I don't think an elf_flags_init field is
18140 written into the object. */
18141 /* BFD_ASSERT (elf_flags_init (ibfd)); */
18142
18143 in_flags = elf_elfheader (ibfd)->e_flags;
18144 out_flags = elf_elfheader (obfd)->e_flags;
18145
18146 /* In theory there is no reason why we couldn't handle this. However
18147 in practice it isn't even close to working and there is no real
18148 reason to want it. */
18149 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
18150 && !(ibfd->flags & DYNAMIC)
18151 && (in_flags & EF_ARM_BE8))
18152 {
18153 _bfd_error_handler (_("error: %B is already in final BE8 format"),
18154 ibfd);
18155 return FALSE;
18156 }
18157
18158 if (!elf_flags_init (obfd))
18159 {
18160 /* If the input is the default architecture and had the default
18161 flags then do not bother setting the flags for the output
18162 architecture, instead allow future merges to do this. If no
18163 future merges ever set these flags then they will retain their
18164 uninitialised values, which surprise surprise, correspond
18165 to the default values. */
18166 if (bfd_get_arch_info (ibfd)->the_default
18167 && elf_elfheader (ibfd)->e_flags == 0)
18168 return TRUE;
18169
18170 elf_flags_init (obfd) = TRUE;
18171 elf_elfheader (obfd)->e_flags = in_flags;
18172
18173 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
18174 && bfd_get_arch_info (obfd)->the_default)
18175 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
18176
18177 return TRUE;
18178 }
18179
18180 /* Determine what should happen if the input ARM architecture
18181 does not match the output ARM architecture. */
18182 if (! bfd_arm_merge_machines (ibfd, obfd))
18183 return FALSE;
18184
18185 /* Identical flags must be compatible. */
18186 if (in_flags == out_flags)
18187 return TRUE;
18188
18189 /* Check to see if the input BFD actually contains any sections. If
18190 not, its flags may not have been initialised either, but it
18191 cannot actually cause any incompatiblity. Do not short-circuit
18192 dynamic objects; their section list may be emptied by
18193 elf_link_add_object_symbols.
18194
18195 Also check to see if there are no code sections in the input.
18196 In this case there is no need to check for code specific flags.
18197 XXX - do we need to worry about floating-point format compatability
18198 in data sections ? */
18199 if (!(ibfd->flags & DYNAMIC))
18200 {
18201 bfd_boolean null_input_bfd = TRUE;
18202 bfd_boolean only_data_sections = TRUE;
18203
18204 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
18205 {
18206 /* Ignore synthetic glue sections. */
18207 if (strcmp (sec->name, ".glue_7")
18208 && strcmp (sec->name, ".glue_7t"))
18209 {
18210 if ((bfd_get_section_flags (ibfd, sec)
18211 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
18212 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
18213 only_data_sections = FALSE;
18214
18215 null_input_bfd = FALSE;
18216 break;
18217 }
18218 }
18219
18220 if (null_input_bfd || only_data_sections)
18221 return TRUE;
18222 }
18223
18224 /* Complain about various flag mismatches. */
18225 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
18226 EF_ARM_EABI_VERSION (out_flags)))
18227 {
18228 _bfd_error_handler
18229 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
18230 ibfd, obfd,
18231 (in_flags & EF_ARM_EABIMASK) >> 24,
18232 (out_flags & EF_ARM_EABIMASK) >> 24);
18233 return FALSE;
18234 }
18235
18236 /* Not sure what needs to be checked for EABI versions >= 1. */
18237 /* VxWorks libraries do not use these flags. */
18238 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
18239 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
18240 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
18241 {
18242 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
18243 {
18244 _bfd_error_handler
18245 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
18246 ibfd, obfd,
18247 in_flags & EF_ARM_APCS_26 ? 26 : 32,
18248 out_flags & EF_ARM_APCS_26 ? 26 : 32);
18249 flags_compatible = FALSE;
18250 }
18251
18252 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
18253 {
18254 if (in_flags & EF_ARM_APCS_FLOAT)
18255 _bfd_error_handler
18256 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
18257 ibfd, obfd);
18258 else
18259 _bfd_error_handler
18260 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
18261 ibfd, obfd);
18262
18263 flags_compatible = FALSE;
18264 }
18265
18266 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
18267 {
18268 if (in_flags & EF_ARM_VFP_FLOAT)
18269 _bfd_error_handler
18270 (_("error: %B uses VFP instructions, whereas %B does not"),
18271 ibfd, obfd);
18272 else
18273 _bfd_error_handler
18274 (_("error: %B uses FPA instructions, whereas %B does not"),
18275 ibfd, obfd);
18276
18277 flags_compatible = FALSE;
18278 }
18279
18280 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
18281 {
18282 if (in_flags & EF_ARM_MAVERICK_FLOAT)
18283 _bfd_error_handler
18284 (_("error: %B uses Maverick instructions, whereas %B does not"),
18285 ibfd, obfd);
18286 else
18287 _bfd_error_handler
18288 (_("error: %B does not use Maverick instructions, whereas %B does"),
18289 ibfd, obfd);
18290
18291 flags_compatible = FALSE;
18292 }
18293
18294 #ifdef EF_ARM_SOFT_FLOAT
18295 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
18296 {
18297 /* We can allow interworking between code that is VFP format
18298 layout, and uses either soft float or integer regs for
18299 passing floating point arguments and results. We already
18300 know that the APCS_FLOAT flags match; similarly for VFP
18301 flags. */
18302 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
18303 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
18304 {
18305 if (in_flags & EF_ARM_SOFT_FLOAT)
18306 _bfd_error_handler
18307 (_("error: %B uses software FP, whereas %B uses hardware FP"),
18308 ibfd, obfd);
18309 else
18310 _bfd_error_handler
18311 (_("error: %B uses hardware FP, whereas %B uses software FP"),
18312 ibfd, obfd);
18313
18314 flags_compatible = FALSE;
18315 }
18316 }
18317 #endif
18318
18319 /* Interworking mismatch is only a warning. */
18320 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
18321 {
18322 if (in_flags & EF_ARM_INTERWORK)
18323 {
18324 _bfd_error_handler
18325 (_("Warning: %B supports interworking, whereas %B does not"),
18326 ibfd, obfd);
18327 }
18328 else
18329 {
18330 _bfd_error_handler
18331 (_("Warning: %B does not support interworking, whereas %B does"),
18332 ibfd, obfd);
18333 }
18334 }
18335 }
18336
18337 return flags_compatible;
18338 }
18339
18340
18341 /* Symbian OS Targets. */
18342
18343 #undef TARGET_LITTLE_SYM
18344 #define TARGET_LITTLE_SYM arm_elf32_symbian_le_vec
18345 #undef TARGET_LITTLE_NAME
18346 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
18347 #undef TARGET_BIG_SYM
18348 #define TARGET_BIG_SYM arm_elf32_symbian_be_vec
18349 #undef TARGET_BIG_NAME
18350 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
18351
18352 /* Like elf32_arm_link_hash_table_create -- but overrides
18353 appropriately for Symbian OS. */
18354
18355 static struct bfd_link_hash_table *
18356 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
18357 {
18358 struct bfd_link_hash_table *ret;
18359
18360 ret = elf32_arm_link_hash_table_create (abfd);
18361 if (ret)
18362 {
18363 struct elf32_arm_link_hash_table *htab
18364 = (struct elf32_arm_link_hash_table *)ret;
18365 /* There is no PLT header for Symbian OS. */
18366 htab->plt_header_size = 0;
18367 /* The PLT entries are each one instruction and one word. */
18368 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
18369 htab->symbian_p = 1;
18370 /* Symbian uses armv5t or above, so use_blx is always true. */
18371 htab->use_blx = 1;
18372 htab->root.is_relocatable_executable = 1;
18373 }
18374 return ret;
18375 }
18376
18377 static const struct bfd_elf_special_section
18378 elf32_arm_symbian_special_sections[] =
18379 {
18380 /* In a BPABI executable, the dynamic linking sections do not go in
18381 the loadable read-only segment. The post-linker may wish to
18382 refer to these sections, but they are not part of the final
18383 program image. */
18384 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
18385 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
18386 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
18387 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
18388 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
18389 /* These sections do not need to be writable as the SymbianOS
18390 postlinker will arrange things so that no dynamic relocation is
18391 required. */
18392 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
18393 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
18394 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
18395 { NULL, 0, 0, 0, 0 }
18396 };
18397
18398 static void
18399 elf32_arm_symbian_begin_write_processing (bfd *abfd,
18400 struct bfd_link_info *link_info)
18401 {
18402 /* BPABI objects are never loaded directly by an OS kernel; they are
18403 processed by a postlinker first, into an OS-specific format. If
18404 the D_PAGED bit is set on the file, BFD will align segments on
18405 page boundaries, so that an OS can directly map the file. With
18406 BPABI objects, that just results in wasted space. In addition,
18407 because we clear the D_PAGED bit, map_sections_to_segments will
18408 recognize that the program headers should not be mapped into any
18409 loadable segment. */
18410 abfd->flags &= ~D_PAGED;
18411 elf32_arm_begin_write_processing (abfd, link_info);
18412 }
18413
18414 static bfd_boolean
18415 elf32_arm_symbian_modify_segment_map (bfd *abfd,
18416 struct bfd_link_info *info)
18417 {
18418 struct elf_segment_map *m;
18419 asection *dynsec;
18420
18421 /* BPABI shared libraries and executables should have a PT_DYNAMIC
18422 segment. However, because the .dynamic section is not marked
18423 with SEC_LOAD, the generic ELF code will not create such a
18424 segment. */
18425 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
18426 if (dynsec)
18427 {
18428 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
18429 if (m->p_type == PT_DYNAMIC)
18430 break;
18431
18432 if (m == NULL)
18433 {
18434 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
18435 m->next = elf_seg_map (abfd);
18436 elf_seg_map (abfd) = m;
18437 }
18438 }
18439
18440 /* Also call the generic arm routine. */
18441 return elf32_arm_modify_segment_map (abfd, info);
18442 }
18443
18444 /* Return address for Ith PLT stub in section PLT, for relocation REL
18445 or (bfd_vma) -1 if it should not be included. */
18446
18447 static bfd_vma
18448 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
18449 const arelent *rel ATTRIBUTE_UNUSED)
18450 {
18451 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
18452 }
18453
18454
18455 #undef elf32_bed
18456 #define elf32_bed elf32_arm_symbian_bed
18457
18458 /* The dynamic sections are not allocated on SymbianOS; the postlinker
18459 will process them and then discard them. */
18460 #undef ELF_DYNAMIC_SEC_FLAGS
18461 #define ELF_DYNAMIC_SEC_FLAGS \
18462 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
18463
18464 #undef elf_backend_emit_relocs
18465
18466 #undef bfd_elf32_bfd_link_hash_table_create
18467 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
18468 #undef elf_backend_special_sections
18469 #define elf_backend_special_sections elf32_arm_symbian_special_sections
18470 #undef elf_backend_begin_write_processing
18471 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
18472 #undef elf_backend_final_write_processing
18473 #define elf_backend_final_write_processing elf32_arm_final_write_processing
18474
18475 #undef elf_backend_modify_segment_map
18476 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
18477
18478 /* There is no .got section for BPABI objects, and hence no header. */
18479 #undef elf_backend_got_header_size
18480 #define elf_backend_got_header_size 0
18481
18482 /* Similarly, there is no .got.plt section. */
18483 #undef elf_backend_want_got_plt
18484 #define elf_backend_want_got_plt 0
18485
18486 #undef elf_backend_plt_sym_val
18487 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
18488
18489 #undef elf_backend_may_use_rel_p
18490 #define elf_backend_may_use_rel_p 1
18491 #undef elf_backend_may_use_rela_p
18492 #define elf_backend_may_use_rela_p 0
18493 #undef elf_backend_default_use_rela_p
18494 #define elf_backend_default_use_rela_p 0
18495 #undef elf_backend_want_plt_sym
18496 #define elf_backend_want_plt_sym 0
18497 #undef ELF_MAXPAGESIZE
18498 #define ELF_MAXPAGESIZE 0x8000
18499
18500 #include "elf32-target.h"
GDB Binutils - Deliverables
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