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2009-01-15 Andrew Stubbs <ams@codesourcery.com>
[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libiberty.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf-vxworks.h"
28 #include "elf/arm.h"
29
30 /* Return the relocation section associated with NAME. HTAB is the
31 bfd's elf32_arm_link_hash_entry. */
32 #define RELOC_SECTION(HTAB, NAME) \
33 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
34
35 /* Return size of a relocation entry. HTAB is the bfd's
36 elf32_arm_link_hash_entry. */
37 #define RELOC_SIZE(HTAB) \
38 ((HTAB)->use_rel \
39 ? sizeof (Elf32_External_Rel) \
40 : sizeof (Elf32_External_Rela))
41
42 /* Return function to swap relocations in. HTAB is the bfd's
43 elf32_arm_link_hash_entry. */
44 #define SWAP_RELOC_IN(HTAB) \
45 ((HTAB)->use_rel \
46 ? bfd_elf32_swap_reloc_in \
47 : bfd_elf32_swap_reloca_in)
48
49 /* Return function to swap relocations out. HTAB is the bfd's
50 elf32_arm_link_hash_entry. */
51 #define SWAP_RELOC_OUT(HTAB) \
52 ((HTAB)->use_rel \
53 ? bfd_elf32_swap_reloc_out \
54 : bfd_elf32_swap_reloca_out)
55
56 #define elf_info_to_howto 0
57 #define elf_info_to_howto_rel elf32_arm_info_to_howto
58
59 #define ARM_ELF_ABI_VERSION 0
60 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
61
62 static struct elf_backend_data elf32_arm_vxworks_bed;
63
64 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
65 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
66 in that slot. */
67
68 static reloc_howto_type elf32_arm_howto_table_1[] =
69 {
70 /* No relocation. */
71 HOWTO (R_ARM_NONE, /* type */
72 0, /* rightshift */
73 0, /* size (0 = byte, 1 = short, 2 = long) */
74 0, /* bitsize */
75 FALSE, /* pc_relative */
76 0, /* bitpos */
77 complain_overflow_dont,/* complain_on_overflow */
78 bfd_elf_generic_reloc, /* special_function */
79 "R_ARM_NONE", /* name */
80 FALSE, /* partial_inplace */
81 0, /* src_mask */
82 0, /* dst_mask */
83 FALSE), /* pcrel_offset */
84
85 HOWTO (R_ARM_PC24, /* type */
86 2, /* rightshift */
87 2, /* size (0 = byte, 1 = short, 2 = long) */
88 24, /* bitsize */
89 TRUE, /* pc_relative */
90 0, /* bitpos */
91 complain_overflow_signed,/* complain_on_overflow */
92 bfd_elf_generic_reloc, /* special_function */
93 "R_ARM_PC24", /* name */
94 FALSE, /* partial_inplace */
95 0x00ffffff, /* src_mask */
96 0x00ffffff, /* dst_mask */
97 TRUE), /* pcrel_offset */
98
99 /* 32 bit absolute */
100 HOWTO (R_ARM_ABS32, /* type */
101 0, /* rightshift */
102 2, /* size (0 = byte, 1 = short, 2 = long) */
103 32, /* bitsize */
104 FALSE, /* pc_relative */
105 0, /* bitpos */
106 complain_overflow_bitfield,/* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_ARM_ABS32", /* name */
109 FALSE, /* partial_inplace */
110 0xffffffff, /* src_mask */
111 0xffffffff, /* dst_mask */
112 FALSE), /* pcrel_offset */
113
114 /* standard 32bit pc-relative reloc */
115 HOWTO (R_ARM_REL32, /* type */
116 0, /* rightshift */
117 2, /* size (0 = byte, 1 = short, 2 = long) */
118 32, /* bitsize */
119 TRUE, /* pc_relative */
120 0, /* bitpos */
121 complain_overflow_bitfield,/* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_ARM_REL32", /* name */
124 FALSE, /* partial_inplace */
125 0xffffffff, /* src_mask */
126 0xffffffff, /* dst_mask */
127 TRUE), /* pcrel_offset */
128
129 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
130 HOWTO (R_ARM_LDR_PC_G0, /* type */
131 0, /* rightshift */
132 0, /* size (0 = byte, 1 = short, 2 = long) */
133 32, /* bitsize */
134 TRUE, /* pc_relative */
135 0, /* bitpos */
136 complain_overflow_dont,/* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_ARM_LDR_PC_G0", /* name */
139 FALSE, /* partial_inplace */
140 0xffffffff, /* src_mask */
141 0xffffffff, /* dst_mask */
142 TRUE), /* pcrel_offset */
143
144 /* 16 bit absolute */
145 HOWTO (R_ARM_ABS16, /* type */
146 0, /* rightshift */
147 1, /* size (0 = byte, 1 = short, 2 = long) */
148 16, /* bitsize */
149 FALSE, /* pc_relative */
150 0, /* bitpos */
151 complain_overflow_bitfield,/* complain_on_overflow */
152 bfd_elf_generic_reloc, /* special_function */
153 "R_ARM_ABS16", /* name */
154 FALSE, /* partial_inplace */
155 0x0000ffff, /* src_mask */
156 0x0000ffff, /* dst_mask */
157 FALSE), /* pcrel_offset */
158
159 /* 12 bit absolute */
160 HOWTO (R_ARM_ABS12, /* type */
161 0, /* rightshift */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
163 12, /* bitsize */
164 FALSE, /* pc_relative */
165 0, /* bitpos */
166 complain_overflow_bitfield,/* complain_on_overflow */
167 bfd_elf_generic_reloc, /* special_function */
168 "R_ARM_ABS12", /* name */
169 FALSE, /* partial_inplace */
170 0x00000fff, /* src_mask */
171 0x00000fff, /* dst_mask */
172 FALSE), /* pcrel_offset */
173
174 HOWTO (R_ARM_THM_ABS5, /* type */
175 6, /* rightshift */
176 1, /* size (0 = byte, 1 = short, 2 = long) */
177 5, /* bitsize */
178 FALSE, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_bitfield,/* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_ARM_THM_ABS5", /* name */
183 FALSE, /* partial_inplace */
184 0x000007e0, /* src_mask */
185 0x000007e0, /* dst_mask */
186 FALSE), /* pcrel_offset */
187
188 /* 8 bit absolute */
189 HOWTO (R_ARM_ABS8, /* type */
190 0, /* rightshift */
191 0, /* size (0 = byte, 1 = short, 2 = long) */
192 8, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_bitfield,/* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_ARM_ABS8", /* name */
198 FALSE, /* partial_inplace */
199 0x000000ff, /* src_mask */
200 0x000000ff, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203 HOWTO (R_ARM_SBREL32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont,/* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_ARM_SBREL32", /* name */
212 FALSE, /* partial_inplace */
213 0xffffffff, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 HOWTO (R_ARM_THM_CALL, /* type */
218 1, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 25, /* bitsize */
221 TRUE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_signed,/* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_ARM_THM_CALL", /* name */
226 FALSE, /* partial_inplace */
227 0x07ff07ff, /* src_mask */
228 0x07ff07ff, /* dst_mask */
229 TRUE), /* pcrel_offset */
230
231 HOWTO (R_ARM_THM_PC8, /* type */
232 1, /* rightshift */
233 1, /* size (0 = byte, 1 = short, 2 = long) */
234 8, /* bitsize */
235 TRUE, /* pc_relative */
236 0, /* bitpos */
237 complain_overflow_signed,/* complain_on_overflow */
238 bfd_elf_generic_reloc, /* special_function */
239 "R_ARM_THM_PC8", /* name */
240 FALSE, /* partial_inplace */
241 0x000000ff, /* src_mask */
242 0x000000ff, /* dst_mask */
243 TRUE), /* pcrel_offset */
244
245 HOWTO (R_ARM_BREL_ADJ, /* type */
246 1, /* rightshift */
247 1, /* size (0 = byte, 1 = short, 2 = long) */
248 32, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_signed,/* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_ARM_BREL_ADJ", /* name */
254 FALSE, /* partial_inplace */
255 0xffffffff, /* src_mask */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 HOWTO (R_ARM_SWI24, /* type */
260 0, /* rightshift */
261 0, /* size (0 = byte, 1 = short, 2 = long) */
262 0, /* bitsize */
263 FALSE, /* pc_relative */
264 0, /* bitpos */
265 complain_overflow_signed,/* complain_on_overflow */
266 bfd_elf_generic_reloc, /* special_function */
267 "R_ARM_SWI24", /* name */
268 FALSE, /* partial_inplace */
269 0x00000000, /* src_mask */
270 0x00000000, /* dst_mask */
271 FALSE), /* pcrel_offset */
272
273 HOWTO (R_ARM_THM_SWI8, /* type */
274 0, /* rightshift */
275 0, /* size (0 = byte, 1 = short, 2 = long) */
276 0, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_signed,/* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_ARM_SWI8", /* name */
282 FALSE, /* partial_inplace */
283 0x00000000, /* src_mask */
284 0x00000000, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* BLX instruction for the ARM. */
288 HOWTO (R_ARM_XPC25, /* type */
289 2, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 25, /* bitsize */
292 TRUE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_signed,/* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_ARM_XPC25", /* name */
297 FALSE, /* partial_inplace */
298 0x00ffffff, /* src_mask */
299 0x00ffffff, /* dst_mask */
300 TRUE), /* pcrel_offset */
301
302 /* BLX instruction for the Thumb. */
303 HOWTO (R_ARM_THM_XPC22, /* type */
304 2, /* rightshift */
305 2, /* size (0 = byte, 1 = short, 2 = long) */
306 22, /* bitsize */
307 TRUE, /* pc_relative */
308 0, /* bitpos */
309 complain_overflow_signed,/* complain_on_overflow */
310 bfd_elf_generic_reloc, /* special_function */
311 "R_ARM_THM_XPC22", /* name */
312 FALSE, /* partial_inplace */
313 0x07ff07ff, /* src_mask */
314 0x07ff07ff, /* dst_mask */
315 TRUE), /* pcrel_offset */
316
317 /* Dynamic TLS relocations. */
318
319 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
320 0, /* rightshift */
321 2, /* size (0 = byte, 1 = short, 2 = long) */
322 32, /* bitsize */
323 FALSE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield,/* complain_on_overflow */
326 bfd_elf_generic_reloc, /* special_function */
327 "R_ARM_TLS_DTPMOD32", /* name */
328 TRUE, /* partial_inplace */
329 0xffffffff, /* src_mask */
330 0xffffffff, /* dst_mask */
331 FALSE), /* pcrel_offset */
332
333 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 32, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield,/* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_ARM_TLS_DTPOFF32", /* name */
342 TRUE, /* partial_inplace */
343 0xffffffff, /* src_mask */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 HOWTO (R_ARM_TLS_TPOFF32, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 32, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield,/* complain_on_overflow */
354 bfd_elf_generic_reloc, /* special_function */
355 "R_ARM_TLS_TPOFF32", /* name */
356 TRUE, /* partial_inplace */
357 0xffffffff, /* src_mask */
358 0xffffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* Relocs used in ARM Linux */
362
363 HOWTO (R_ARM_COPY, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 32, /* bitsize */
367 FALSE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_bitfield,/* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_ARM_COPY", /* name */
372 TRUE, /* partial_inplace */
373 0xffffffff, /* src_mask */
374 0xffffffff, /* dst_mask */
375 FALSE), /* pcrel_offset */
376
377 HOWTO (R_ARM_GLOB_DAT, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 32, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_bitfield,/* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_ARM_GLOB_DAT", /* name */
386 TRUE, /* partial_inplace */
387 0xffffffff, /* src_mask */
388 0xffffffff, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 HOWTO (R_ARM_JUMP_SLOT, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 32, /* bitsize */
395 FALSE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_bitfield,/* complain_on_overflow */
398 bfd_elf_generic_reloc, /* special_function */
399 "R_ARM_JUMP_SLOT", /* name */
400 TRUE, /* partial_inplace */
401 0xffffffff, /* src_mask */
402 0xffffffff, /* dst_mask */
403 FALSE), /* pcrel_offset */
404
405 HOWTO (R_ARM_RELATIVE, /* type */
406 0, /* rightshift */
407 2, /* size (0 = byte, 1 = short, 2 = long) */
408 32, /* bitsize */
409 FALSE, /* pc_relative */
410 0, /* bitpos */
411 complain_overflow_bitfield,/* complain_on_overflow */
412 bfd_elf_generic_reloc, /* special_function */
413 "R_ARM_RELATIVE", /* name */
414 TRUE, /* partial_inplace */
415 0xffffffff, /* src_mask */
416 0xffffffff, /* dst_mask */
417 FALSE), /* pcrel_offset */
418
419 HOWTO (R_ARM_GOTOFF32, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 32, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_bitfield,/* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_ARM_GOTOFF32", /* name */
428 TRUE, /* partial_inplace */
429 0xffffffff, /* src_mask */
430 0xffffffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 HOWTO (R_ARM_GOTPC, /* type */
434 0, /* rightshift */
435 2, /* size (0 = byte, 1 = short, 2 = long) */
436 32, /* bitsize */
437 TRUE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield,/* complain_on_overflow */
440 bfd_elf_generic_reloc, /* special_function */
441 "R_ARM_GOTPC", /* name */
442 TRUE, /* partial_inplace */
443 0xffffffff, /* src_mask */
444 0xffffffff, /* dst_mask */
445 TRUE), /* pcrel_offset */
446
447 HOWTO (R_ARM_GOT32, /* type */
448 0, /* rightshift */
449 2, /* size (0 = byte, 1 = short, 2 = long) */
450 32, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_bitfield,/* complain_on_overflow */
454 bfd_elf_generic_reloc, /* special_function */
455 "R_ARM_GOT32", /* name */
456 TRUE, /* partial_inplace */
457 0xffffffff, /* src_mask */
458 0xffffffff, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 HOWTO (R_ARM_PLT32, /* type */
462 2, /* rightshift */
463 2, /* size (0 = byte, 1 = short, 2 = long) */
464 24, /* bitsize */
465 TRUE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_bitfield,/* complain_on_overflow */
468 bfd_elf_generic_reloc, /* special_function */
469 "R_ARM_PLT32", /* name */
470 FALSE, /* partial_inplace */
471 0x00ffffff, /* src_mask */
472 0x00ffffff, /* dst_mask */
473 TRUE), /* pcrel_offset */
474
475 HOWTO (R_ARM_CALL, /* type */
476 2, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 24, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed,/* complain_on_overflow */
482 bfd_elf_generic_reloc, /* special_function */
483 "R_ARM_CALL", /* name */
484 FALSE, /* partial_inplace */
485 0x00ffffff, /* src_mask */
486 0x00ffffff, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 HOWTO (R_ARM_JUMP24, /* type */
490 2, /* rightshift */
491 2, /* size (0 = byte, 1 = short, 2 = long) */
492 24, /* bitsize */
493 TRUE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_signed,/* complain_on_overflow */
496 bfd_elf_generic_reloc, /* special_function */
497 "R_ARM_JUMP24", /* name */
498 FALSE, /* partial_inplace */
499 0x00ffffff, /* src_mask */
500 0x00ffffff, /* dst_mask */
501 TRUE), /* pcrel_offset */
502
503 HOWTO (R_ARM_THM_JUMP24, /* type */
504 1, /* rightshift */
505 2, /* size (0 = byte, 1 = short, 2 = long) */
506 24, /* bitsize */
507 TRUE, /* pc_relative */
508 0, /* bitpos */
509 complain_overflow_signed,/* complain_on_overflow */
510 bfd_elf_generic_reloc, /* special_function */
511 "R_ARM_THM_JUMP24", /* name */
512 FALSE, /* partial_inplace */
513 0x07ff2fff, /* src_mask */
514 0x07ff2fff, /* dst_mask */
515 TRUE), /* pcrel_offset */
516
517 HOWTO (R_ARM_BASE_ABS, /* type */
518 0, /* rightshift */
519 2, /* size (0 = byte, 1 = short, 2 = long) */
520 32, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_dont,/* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 "R_ARM_BASE_ABS", /* name */
526 FALSE, /* partial_inplace */
527 0xffffffff, /* src_mask */
528 0xffffffff, /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
532 0, /* rightshift */
533 2, /* size (0 = byte, 1 = short, 2 = long) */
534 12, /* bitsize */
535 TRUE, /* pc_relative */
536 0, /* bitpos */
537 complain_overflow_dont,/* complain_on_overflow */
538 bfd_elf_generic_reloc, /* special_function */
539 "R_ARM_ALU_PCREL_7_0", /* name */
540 FALSE, /* partial_inplace */
541 0x00000fff, /* src_mask */
542 0x00000fff, /* dst_mask */
543 TRUE), /* pcrel_offset */
544
545 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
546 0, /* rightshift */
547 2, /* size (0 = byte, 1 = short, 2 = long) */
548 12, /* bitsize */
549 TRUE, /* pc_relative */
550 8, /* bitpos */
551 complain_overflow_dont,/* complain_on_overflow */
552 bfd_elf_generic_reloc, /* special_function */
553 "R_ARM_ALU_PCREL_15_8",/* name */
554 FALSE, /* partial_inplace */
555 0x00000fff, /* src_mask */
556 0x00000fff, /* dst_mask */
557 TRUE), /* pcrel_offset */
558
559 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
560 0, /* rightshift */
561 2, /* size (0 = byte, 1 = short, 2 = long) */
562 12, /* bitsize */
563 TRUE, /* pc_relative */
564 16, /* bitpos */
565 complain_overflow_dont,/* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_ARM_ALU_PCREL_23_15",/* name */
568 FALSE, /* partial_inplace */
569 0x00000fff, /* src_mask */
570 0x00000fff, /* dst_mask */
571 TRUE), /* pcrel_offset */
572
573 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 12, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont,/* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_ARM_LDR_SBREL_11_0",/* name */
582 FALSE, /* partial_inplace */
583 0x00000fff, /* src_mask */
584 0x00000fff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
588 0, /* rightshift */
589 2, /* size (0 = byte, 1 = short, 2 = long) */
590 8, /* bitsize */
591 FALSE, /* pc_relative */
592 12, /* bitpos */
593 complain_overflow_dont,/* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_ARM_ALU_SBREL_19_12",/* name */
596 FALSE, /* partial_inplace */
597 0x000ff000, /* src_mask */
598 0x000ff000, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 8, /* bitsize */
605 FALSE, /* pc_relative */
606 20, /* bitpos */
607 complain_overflow_dont,/* complain_on_overflow */
608 bfd_elf_generic_reloc, /* special_function */
609 "R_ARM_ALU_SBREL_27_20",/* name */
610 FALSE, /* partial_inplace */
611 0x0ff00000, /* src_mask */
612 0x0ff00000, /* dst_mask */
613 FALSE), /* pcrel_offset */
614
615 HOWTO (R_ARM_TARGET1, /* type */
616 0, /* rightshift */
617 2, /* size (0 = byte, 1 = short, 2 = long) */
618 32, /* bitsize */
619 FALSE, /* pc_relative */
620 0, /* bitpos */
621 complain_overflow_dont,/* complain_on_overflow */
622 bfd_elf_generic_reloc, /* special_function */
623 "R_ARM_TARGET1", /* name */
624 FALSE, /* partial_inplace */
625 0xffffffff, /* src_mask */
626 0xffffffff, /* dst_mask */
627 FALSE), /* pcrel_offset */
628
629 HOWTO (R_ARM_ROSEGREL32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_dont,/* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 "R_ARM_ROSEGREL32", /* name */
638 FALSE, /* partial_inplace */
639 0xffffffff, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 HOWTO (R_ARM_V4BX, /* type */
644 0, /* rightshift */
645 2, /* size (0 = byte, 1 = short, 2 = long) */
646 32, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_dont,/* complain_on_overflow */
650 bfd_elf_generic_reloc, /* special_function */
651 "R_ARM_V4BX", /* name */
652 FALSE, /* partial_inplace */
653 0xffffffff, /* src_mask */
654 0xffffffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 HOWTO (R_ARM_TARGET2, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 FALSE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed,/* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_ARM_TARGET2", /* name */
666 FALSE, /* partial_inplace */
667 0xffffffff, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 HOWTO (R_ARM_PREL31, /* type */
672 0, /* rightshift */
673 2, /* size (0 = byte, 1 = short, 2 = long) */
674 31, /* bitsize */
675 TRUE, /* pc_relative */
676 0, /* bitpos */
677 complain_overflow_signed,/* complain_on_overflow */
678 bfd_elf_generic_reloc, /* special_function */
679 "R_ARM_PREL31", /* name */
680 FALSE, /* partial_inplace */
681 0x7fffffff, /* src_mask */
682 0x7fffffff, /* dst_mask */
683 TRUE), /* pcrel_offset */
684
685 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
686 0, /* rightshift */
687 2, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_dont,/* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 "R_ARM_MOVW_ABS_NC", /* name */
694 FALSE, /* partial_inplace */
695 0x000f0fff, /* src_mask */
696 0x000f0fff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 HOWTO (R_ARM_MOVT_ABS, /* type */
700 0, /* rightshift */
701 2, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_bitfield,/* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_ARM_MOVT_ABS", /* name */
708 FALSE, /* partial_inplace */
709 0x000f0fff, /* src_mask */
710 0x000f0fff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
714 0, /* rightshift */
715 2, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 TRUE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont,/* complain_on_overflow */
720 bfd_elf_generic_reloc, /* special_function */
721 "R_ARM_MOVW_PREL_NC", /* name */
722 FALSE, /* partial_inplace */
723 0x000f0fff, /* src_mask */
724 0x000f0fff, /* dst_mask */
725 TRUE), /* pcrel_offset */
726
727 HOWTO (R_ARM_MOVT_PREL, /* type */
728 0, /* rightshift */
729 2, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 TRUE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield,/* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_ARM_MOVT_PREL", /* name */
736 FALSE, /* partial_inplace */
737 0x000f0fff, /* src_mask */
738 0x000f0fff, /* dst_mask */
739 TRUE), /* pcrel_offset */
740
741 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
742 0, /* rightshift */
743 2, /* size (0 = byte, 1 = short, 2 = long) */
744 16, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont,/* complain_on_overflow */
748 bfd_elf_generic_reloc, /* special_function */
749 "R_ARM_THM_MOVW_ABS_NC",/* name */
750 FALSE, /* partial_inplace */
751 0x040f70ff, /* src_mask */
752 0x040f70ff, /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
756 0, /* rightshift */
757 2, /* size (0 = byte, 1 = short, 2 = long) */
758 16, /* bitsize */
759 FALSE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_bitfield,/* complain_on_overflow */
762 bfd_elf_generic_reloc, /* special_function */
763 "R_ARM_THM_MOVT_ABS", /* name */
764 FALSE, /* partial_inplace */
765 0x040f70ff, /* src_mask */
766 0x040f70ff, /* dst_mask */
767 FALSE), /* pcrel_offset */
768
769 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
770 0, /* rightshift */
771 2, /* size (0 = byte, 1 = short, 2 = long) */
772 16, /* bitsize */
773 TRUE, /* pc_relative */
774 0, /* bitpos */
775 complain_overflow_dont,/* complain_on_overflow */
776 bfd_elf_generic_reloc, /* special_function */
777 "R_ARM_THM_MOVW_PREL_NC",/* name */
778 FALSE, /* partial_inplace */
779 0x040f70ff, /* src_mask */
780 0x040f70ff, /* dst_mask */
781 TRUE), /* pcrel_offset */
782
783 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
784 0, /* rightshift */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
786 16, /* bitsize */
787 TRUE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_bitfield,/* complain_on_overflow */
790 bfd_elf_generic_reloc, /* special_function */
791 "R_ARM_THM_MOVT_PREL", /* name */
792 FALSE, /* partial_inplace */
793 0x040f70ff, /* src_mask */
794 0x040f70ff, /* dst_mask */
795 TRUE), /* pcrel_offset */
796
797 HOWTO (R_ARM_THM_JUMP19, /* type */
798 1, /* rightshift */
799 2, /* size (0 = byte, 1 = short, 2 = long) */
800 19, /* bitsize */
801 TRUE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed,/* complain_on_overflow */
804 bfd_elf_generic_reloc, /* special_function */
805 "R_ARM_THM_JUMP19", /* name */
806 FALSE, /* partial_inplace */
807 0x043f2fff, /* src_mask */
808 0x043f2fff, /* dst_mask */
809 TRUE), /* pcrel_offset */
810
811 HOWTO (R_ARM_THM_JUMP6, /* type */
812 1, /* rightshift */
813 1, /* size (0 = byte, 1 = short, 2 = long) */
814 6, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_unsigned,/* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_ARM_THM_JUMP6", /* name */
820 FALSE, /* partial_inplace */
821 0x02f8, /* src_mask */
822 0x02f8, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* These are declared as 13-bit signed relocations because we can
826 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
827 versa. */
828 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
829 0, /* rightshift */
830 2, /* size (0 = byte, 1 = short, 2 = long) */
831 13, /* bitsize */
832 TRUE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont,/* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_ARM_THM_ALU_PREL_11_0",/* name */
837 FALSE, /* partial_inplace */
838 0xffffffff, /* src_mask */
839 0xffffffff, /* dst_mask */
840 TRUE), /* pcrel_offset */
841
842 HOWTO (R_ARM_THM_PC12, /* type */
843 0, /* rightshift */
844 2, /* size (0 = byte, 1 = short, 2 = long) */
845 13, /* bitsize */
846 TRUE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont,/* complain_on_overflow */
849 bfd_elf_generic_reloc, /* special_function */
850 "R_ARM_THM_PC12", /* name */
851 FALSE, /* partial_inplace */
852 0xffffffff, /* src_mask */
853 0xffffffff, /* dst_mask */
854 TRUE), /* pcrel_offset */
855
856 HOWTO (R_ARM_ABS32_NOI, /* type */
857 0, /* rightshift */
858 2, /* size (0 = byte, 1 = short, 2 = long) */
859 32, /* bitsize */
860 FALSE, /* pc_relative */
861 0, /* bitpos */
862 complain_overflow_dont,/* complain_on_overflow */
863 bfd_elf_generic_reloc, /* special_function */
864 "R_ARM_ABS32_NOI", /* name */
865 FALSE, /* partial_inplace */
866 0xffffffff, /* src_mask */
867 0xffffffff, /* dst_mask */
868 FALSE), /* pcrel_offset */
869
870 HOWTO (R_ARM_REL32_NOI, /* type */
871 0, /* rightshift */
872 2, /* size (0 = byte, 1 = short, 2 = long) */
873 32, /* bitsize */
874 TRUE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_dont,/* complain_on_overflow */
877 bfd_elf_generic_reloc, /* special_function */
878 "R_ARM_REL32_NOI", /* name */
879 FALSE, /* partial_inplace */
880 0xffffffff, /* src_mask */
881 0xffffffff, /* dst_mask */
882 FALSE), /* pcrel_offset */
883
884 /* Group relocations. */
885
886 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
887 0, /* rightshift */
888 2, /* size (0 = byte, 1 = short, 2 = long) */
889 32, /* bitsize */
890 TRUE, /* pc_relative */
891 0, /* bitpos */
892 complain_overflow_dont,/* complain_on_overflow */
893 bfd_elf_generic_reloc, /* special_function */
894 "R_ARM_ALU_PC_G0_NC", /* name */
895 FALSE, /* partial_inplace */
896 0xffffffff, /* src_mask */
897 0xffffffff, /* dst_mask */
898 TRUE), /* pcrel_offset */
899
900 HOWTO (R_ARM_ALU_PC_G0, /* type */
901 0, /* rightshift */
902 2, /* size (0 = byte, 1 = short, 2 = long) */
903 32, /* bitsize */
904 TRUE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont,/* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_ARM_ALU_PC_G0", /* name */
909 FALSE, /* partial_inplace */
910 0xffffffff, /* src_mask */
911 0xffffffff, /* dst_mask */
912 TRUE), /* pcrel_offset */
913
914 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
915 0, /* rightshift */
916 2, /* size (0 = byte, 1 = short, 2 = long) */
917 32, /* bitsize */
918 TRUE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont,/* complain_on_overflow */
921 bfd_elf_generic_reloc, /* special_function */
922 "R_ARM_ALU_PC_G1_NC", /* name */
923 FALSE, /* partial_inplace */
924 0xffffffff, /* src_mask */
925 0xffffffff, /* dst_mask */
926 TRUE), /* pcrel_offset */
927
928 HOWTO (R_ARM_ALU_PC_G1, /* type */
929 0, /* rightshift */
930 2, /* size (0 = byte, 1 = short, 2 = long) */
931 32, /* bitsize */
932 TRUE, /* pc_relative */
933 0, /* bitpos */
934 complain_overflow_dont,/* complain_on_overflow */
935 bfd_elf_generic_reloc, /* special_function */
936 "R_ARM_ALU_PC_G1", /* name */
937 FALSE, /* partial_inplace */
938 0xffffffff, /* src_mask */
939 0xffffffff, /* dst_mask */
940 TRUE), /* pcrel_offset */
941
942 HOWTO (R_ARM_ALU_PC_G2, /* type */
943 0, /* rightshift */
944 2, /* size (0 = byte, 1 = short, 2 = long) */
945 32, /* bitsize */
946 TRUE, /* pc_relative */
947 0, /* bitpos */
948 complain_overflow_dont,/* complain_on_overflow */
949 bfd_elf_generic_reloc, /* special_function */
950 "R_ARM_ALU_PC_G2", /* name */
951 FALSE, /* partial_inplace */
952 0xffffffff, /* src_mask */
953 0xffffffff, /* dst_mask */
954 TRUE), /* pcrel_offset */
955
956 HOWTO (R_ARM_LDR_PC_G1, /* type */
957 0, /* rightshift */
958 2, /* size (0 = byte, 1 = short, 2 = long) */
959 32, /* bitsize */
960 TRUE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont,/* complain_on_overflow */
963 bfd_elf_generic_reloc, /* special_function */
964 "R_ARM_LDR_PC_G1", /* name */
965 FALSE, /* partial_inplace */
966 0xffffffff, /* src_mask */
967 0xffffffff, /* dst_mask */
968 TRUE), /* pcrel_offset */
969
970 HOWTO (R_ARM_LDR_PC_G2, /* type */
971 0, /* rightshift */
972 2, /* size (0 = byte, 1 = short, 2 = long) */
973 32, /* bitsize */
974 TRUE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont,/* complain_on_overflow */
977 bfd_elf_generic_reloc, /* special_function */
978 "R_ARM_LDR_PC_G2", /* name */
979 FALSE, /* partial_inplace */
980 0xffffffff, /* src_mask */
981 0xffffffff, /* dst_mask */
982 TRUE), /* pcrel_offset */
983
984 HOWTO (R_ARM_LDRS_PC_G0, /* type */
985 0, /* rightshift */
986 2, /* size (0 = byte, 1 = short, 2 = long) */
987 32, /* bitsize */
988 TRUE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_dont,/* complain_on_overflow */
991 bfd_elf_generic_reloc, /* special_function */
992 "R_ARM_LDRS_PC_G0", /* name */
993 FALSE, /* partial_inplace */
994 0xffffffff, /* src_mask */
995 0xffffffff, /* dst_mask */
996 TRUE), /* pcrel_offset */
997
998 HOWTO (R_ARM_LDRS_PC_G1, /* type */
999 0, /* rightshift */
1000 2, /* size (0 = byte, 1 = short, 2 = long) */
1001 32, /* bitsize */
1002 TRUE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_dont,/* complain_on_overflow */
1005 bfd_elf_generic_reloc, /* special_function */
1006 "R_ARM_LDRS_PC_G1", /* name */
1007 FALSE, /* partial_inplace */
1008 0xffffffff, /* src_mask */
1009 0xffffffff, /* dst_mask */
1010 TRUE), /* pcrel_offset */
1011
1012 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1013 0, /* rightshift */
1014 2, /* size (0 = byte, 1 = short, 2 = long) */
1015 32, /* bitsize */
1016 TRUE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont,/* complain_on_overflow */
1019 bfd_elf_generic_reloc, /* special_function */
1020 "R_ARM_LDRS_PC_G2", /* name */
1021 FALSE, /* partial_inplace */
1022 0xffffffff, /* src_mask */
1023 0xffffffff, /* dst_mask */
1024 TRUE), /* pcrel_offset */
1025
1026 HOWTO (R_ARM_LDC_PC_G0, /* type */
1027 0, /* rightshift */
1028 2, /* size (0 = byte, 1 = short, 2 = long) */
1029 32, /* bitsize */
1030 TRUE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont,/* complain_on_overflow */
1033 bfd_elf_generic_reloc, /* special_function */
1034 "R_ARM_LDC_PC_G0", /* name */
1035 FALSE, /* partial_inplace */
1036 0xffffffff, /* src_mask */
1037 0xffffffff, /* dst_mask */
1038 TRUE), /* pcrel_offset */
1039
1040 HOWTO (R_ARM_LDC_PC_G1, /* type */
1041 0, /* rightshift */
1042 2, /* size (0 = byte, 1 = short, 2 = long) */
1043 32, /* bitsize */
1044 TRUE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont,/* complain_on_overflow */
1047 bfd_elf_generic_reloc, /* special_function */
1048 "R_ARM_LDC_PC_G1", /* name */
1049 FALSE, /* partial_inplace */
1050 0xffffffff, /* src_mask */
1051 0xffffffff, /* dst_mask */
1052 TRUE), /* pcrel_offset */
1053
1054 HOWTO (R_ARM_LDC_PC_G2, /* type */
1055 0, /* rightshift */
1056 2, /* size (0 = byte, 1 = short, 2 = long) */
1057 32, /* bitsize */
1058 TRUE, /* pc_relative */
1059 0, /* bitpos */
1060 complain_overflow_dont,/* complain_on_overflow */
1061 bfd_elf_generic_reloc, /* special_function */
1062 "R_ARM_LDC_PC_G2", /* name */
1063 FALSE, /* partial_inplace */
1064 0xffffffff, /* src_mask */
1065 0xffffffff, /* dst_mask */
1066 TRUE), /* pcrel_offset */
1067
1068 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1069 0, /* rightshift */
1070 2, /* size (0 = byte, 1 = short, 2 = long) */
1071 32, /* bitsize */
1072 TRUE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_dont,/* complain_on_overflow */
1075 bfd_elf_generic_reloc, /* special_function */
1076 "R_ARM_ALU_SB_G0_NC", /* name */
1077 FALSE, /* partial_inplace */
1078 0xffffffff, /* src_mask */
1079 0xffffffff, /* dst_mask */
1080 TRUE), /* pcrel_offset */
1081
1082 HOWTO (R_ARM_ALU_SB_G0, /* type */
1083 0, /* rightshift */
1084 2, /* size (0 = byte, 1 = short, 2 = long) */
1085 32, /* bitsize */
1086 TRUE, /* pc_relative */
1087 0, /* bitpos */
1088 complain_overflow_dont,/* complain_on_overflow */
1089 bfd_elf_generic_reloc, /* special_function */
1090 "R_ARM_ALU_SB_G0", /* name */
1091 FALSE, /* partial_inplace */
1092 0xffffffff, /* src_mask */
1093 0xffffffff, /* dst_mask */
1094 TRUE), /* pcrel_offset */
1095
1096 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1097 0, /* rightshift */
1098 2, /* size (0 = byte, 1 = short, 2 = long) */
1099 32, /* bitsize */
1100 TRUE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_dont,/* complain_on_overflow */
1103 bfd_elf_generic_reloc, /* special_function */
1104 "R_ARM_ALU_SB_G1_NC", /* name */
1105 FALSE, /* partial_inplace */
1106 0xffffffff, /* src_mask */
1107 0xffffffff, /* dst_mask */
1108 TRUE), /* pcrel_offset */
1109
1110 HOWTO (R_ARM_ALU_SB_G1, /* type */
1111 0, /* rightshift */
1112 2, /* size (0 = byte, 1 = short, 2 = long) */
1113 32, /* bitsize */
1114 TRUE, /* pc_relative */
1115 0, /* bitpos */
1116 complain_overflow_dont,/* complain_on_overflow */
1117 bfd_elf_generic_reloc, /* special_function */
1118 "R_ARM_ALU_SB_G1", /* name */
1119 FALSE, /* partial_inplace */
1120 0xffffffff, /* src_mask */
1121 0xffffffff, /* dst_mask */
1122 TRUE), /* pcrel_offset */
1123
1124 HOWTO (R_ARM_ALU_SB_G2, /* type */
1125 0, /* rightshift */
1126 2, /* size (0 = byte, 1 = short, 2 = long) */
1127 32, /* bitsize */
1128 TRUE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont,/* complain_on_overflow */
1131 bfd_elf_generic_reloc, /* special_function */
1132 "R_ARM_ALU_SB_G2", /* name */
1133 FALSE, /* partial_inplace */
1134 0xffffffff, /* src_mask */
1135 0xffffffff, /* dst_mask */
1136 TRUE), /* pcrel_offset */
1137
1138 HOWTO (R_ARM_LDR_SB_G0, /* type */
1139 0, /* rightshift */
1140 2, /* size (0 = byte, 1 = short, 2 = long) */
1141 32, /* bitsize */
1142 TRUE, /* pc_relative */
1143 0, /* bitpos */
1144 complain_overflow_dont,/* complain_on_overflow */
1145 bfd_elf_generic_reloc, /* special_function */
1146 "R_ARM_LDR_SB_G0", /* name */
1147 FALSE, /* partial_inplace */
1148 0xffffffff, /* src_mask */
1149 0xffffffff, /* dst_mask */
1150 TRUE), /* pcrel_offset */
1151
1152 HOWTO (R_ARM_LDR_SB_G1, /* type */
1153 0, /* rightshift */
1154 2, /* size (0 = byte, 1 = short, 2 = long) */
1155 32, /* bitsize */
1156 TRUE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_dont,/* complain_on_overflow */
1159 bfd_elf_generic_reloc, /* special_function */
1160 "R_ARM_LDR_SB_G1", /* name */
1161 FALSE, /* partial_inplace */
1162 0xffffffff, /* src_mask */
1163 0xffffffff, /* dst_mask */
1164 TRUE), /* pcrel_offset */
1165
1166 HOWTO (R_ARM_LDR_SB_G2, /* type */
1167 0, /* rightshift */
1168 2, /* size (0 = byte, 1 = short, 2 = long) */
1169 32, /* bitsize */
1170 TRUE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont,/* complain_on_overflow */
1173 bfd_elf_generic_reloc, /* special_function */
1174 "R_ARM_LDR_SB_G2", /* name */
1175 FALSE, /* partial_inplace */
1176 0xffffffff, /* src_mask */
1177 0xffffffff, /* dst_mask */
1178 TRUE), /* pcrel_offset */
1179
1180 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1181 0, /* rightshift */
1182 2, /* size (0 = byte, 1 = short, 2 = long) */
1183 32, /* bitsize */
1184 TRUE, /* pc_relative */
1185 0, /* bitpos */
1186 complain_overflow_dont,/* complain_on_overflow */
1187 bfd_elf_generic_reloc, /* special_function */
1188 "R_ARM_LDRS_SB_G0", /* name */
1189 FALSE, /* partial_inplace */
1190 0xffffffff, /* src_mask */
1191 0xffffffff, /* dst_mask */
1192 TRUE), /* pcrel_offset */
1193
1194 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1195 0, /* rightshift */
1196 2, /* size (0 = byte, 1 = short, 2 = long) */
1197 32, /* bitsize */
1198 TRUE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont,/* complain_on_overflow */
1201 bfd_elf_generic_reloc, /* special_function */
1202 "R_ARM_LDRS_SB_G1", /* name */
1203 FALSE, /* partial_inplace */
1204 0xffffffff, /* src_mask */
1205 0xffffffff, /* dst_mask */
1206 TRUE), /* pcrel_offset */
1207
1208 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1209 0, /* rightshift */
1210 2, /* size (0 = byte, 1 = short, 2 = long) */
1211 32, /* bitsize */
1212 TRUE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_dont,/* complain_on_overflow */
1215 bfd_elf_generic_reloc, /* special_function */
1216 "R_ARM_LDRS_SB_G2", /* name */
1217 FALSE, /* partial_inplace */
1218 0xffffffff, /* src_mask */
1219 0xffffffff, /* dst_mask */
1220 TRUE), /* pcrel_offset */
1221
1222 HOWTO (R_ARM_LDC_SB_G0, /* type */
1223 0, /* rightshift */
1224 2, /* size (0 = byte, 1 = short, 2 = long) */
1225 32, /* bitsize */
1226 TRUE, /* pc_relative */
1227 0, /* bitpos */
1228 complain_overflow_dont,/* complain_on_overflow */
1229 bfd_elf_generic_reloc, /* special_function */
1230 "R_ARM_LDC_SB_G0", /* name */
1231 FALSE, /* partial_inplace */
1232 0xffffffff, /* src_mask */
1233 0xffffffff, /* dst_mask */
1234 TRUE), /* pcrel_offset */
1235
1236 HOWTO (R_ARM_LDC_SB_G1, /* type */
1237 0, /* rightshift */
1238 2, /* size (0 = byte, 1 = short, 2 = long) */
1239 32, /* bitsize */
1240 TRUE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont,/* complain_on_overflow */
1243 bfd_elf_generic_reloc, /* special_function */
1244 "R_ARM_LDC_SB_G1", /* name */
1245 FALSE, /* partial_inplace */
1246 0xffffffff, /* src_mask */
1247 0xffffffff, /* dst_mask */
1248 TRUE), /* pcrel_offset */
1249
1250 HOWTO (R_ARM_LDC_SB_G2, /* type */
1251 0, /* rightshift */
1252 2, /* size (0 = byte, 1 = short, 2 = long) */
1253 32, /* bitsize */
1254 TRUE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_dont,/* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_ARM_LDC_SB_G2", /* name */
1259 FALSE, /* partial_inplace */
1260 0xffffffff, /* src_mask */
1261 0xffffffff, /* dst_mask */
1262 TRUE), /* pcrel_offset */
1263
1264 /* End of group relocations. */
1265
1266 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1267 0, /* rightshift */
1268 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 16, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_dont,/* complain_on_overflow */
1273 bfd_elf_generic_reloc, /* special_function */
1274 "R_ARM_MOVW_BREL_NC", /* name */
1275 FALSE, /* partial_inplace */
1276 0x0000ffff, /* src_mask */
1277 0x0000ffff, /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 HOWTO (R_ARM_MOVT_BREL, /* type */
1281 0, /* rightshift */
1282 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_bitfield,/* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_ARM_MOVT_BREL", /* name */
1289 FALSE, /* partial_inplace */
1290 0x0000ffff, /* src_mask */
1291 0x0000ffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 HOWTO (R_ARM_MOVW_BREL, /* type */
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont,/* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_ARM_MOVW_BREL", /* name */
1303 FALSE, /* partial_inplace */
1304 0x0000ffff, /* src_mask */
1305 0x0000ffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 16, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont,/* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_ARM_THM_MOVW_BREL_NC",/* name */
1317 FALSE, /* partial_inplace */
1318 0x040f70ff, /* src_mask */
1319 0x040f70ff, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 16, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_bitfield,/* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_ARM_THM_MOVT_BREL", /* name */
1331 FALSE, /* partial_inplace */
1332 0x040f70ff, /* src_mask */
1333 0x040f70ff, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 16, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont,/* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_ARM_THM_MOVW_BREL", /* name */
1345 FALSE, /* partial_inplace */
1346 0x040f70ff, /* src_mask */
1347 0x040f70ff, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 EMPTY_HOWTO (90), /* Unallocated. */
1351 EMPTY_HOWTO (91),
1352 EMPTY_HOWTO (92),
1353 EMPTY_HOWTO (93),
1354
1355 HOWTO (R_ARM_PLT32_ABS, /* type */
1356 0, /* rightshift */
1357 2, /* size (0 = byte, 1 = short, 2 = long) */
1358 32, /* bitsize */
1359 FALSE, /* pc_relative */
1360 0, /* bitpos */
1361 complain_overflow_dont,/* complain_on_overflow */
1362 bfd_elf_generic_reloc, /* special_function */
1363 "R_ARM_PLT32_ABS", /* name */
1364 FALSE, /* partial_inplace */
1365 0xffffffff, /* src_mask */
1366 0xffffffff, /* dst_mask */
1367 FALSE), /* pcrel_offset */
1368
1369 HOWTO (R_ARM_GOT_ABS, /* type */
1370 0, /* rightshift */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1372 32, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont,/* complain_on_overflow */
1376 bfd_elf_generic_reloc, /* special_function */
1377 "R_ARM_GOT_ABS", /* name */
1378 FALSE, /* partial_inplace */
1379 0xffffffff, /* src_mask */
1380 0xffffffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 HOWTO (R_ARM_GOT_PREL, /* type */
1384 0, /* rightshift */
1385 2, /* size (0 = byte, 1 = short, 2 = long) */
1386 32, /* bitsize */
1387 TRUE, /* pc_relative */
1388 0, /* bitpos */
1389 complain_overflow_dont, /* complain_on_overflow */
1390 bfd_elf_generic_reloc, /* special_function */
1391 "R_ARM_GOT_PREL", /* name */
1392 FALSE, /* partial_inplace */
1393 0xffffffff, /* src_mask */
1394 0xffffffff, /* dst_mask */
1395 TRUE), /* pcrel_offset */
1396
1397 HOWTO (R_ARM_GOT_BREL12, /* type */
1398 0, /* rightshift */
1399 2, /* size (0 = byte, 1 = short, 2 = long) */
1400 12, /* bitsize */
1401 FALSE, /* pc_relative */
1402 0, /* bitpos */
1403 complain_overflow_bitfield,/* complain_on_overflow */
1404 bfd_elf_generic_reloc, /* special_function */
1405 "R_ARM_GOT_BREL12", /* name */
1406 FALSE, /* partial_inplace */
1407 0x00000fff, /* src_mask */
1408 0x00000fff, /* dst_mask */
1409 FALSE), /* pcrel_offset */
1410
1411 HOWTO (R_ARM_GOTOFF12, /* type */
1412 0, /* rightshift */
1413 2, /* size (0 = byte, 1 = short, 2 = long) */
1414 12, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_bitfield,/* complain_on_overflow */
1418 bfd_elf_generic_reloc, /* special_function */
1419 "R_ARM_GOTOFF12", /* name */
1420 FALSE, /* partial_inplace */
1421 0x00000fff, /* src_mask */
1422 0x00000fff, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1426
1427 /* GNU extension to record C++ vtable member usage */
1428 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1429 0, /* rightshift */
1430 2, /* size (0 = byte, 1 = short, 2 = long) */
1431 0, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_dont, /* complain_on_overflow */
1435 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1436 "R_ARM_GNU_VTENTRY", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* GNU extension to record C++ vtable hierarchy */
1443 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1444 0, /* rightshift */
1445 2, /* size (0 = byte, 1 = short, 2 = long) */
1446 0, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_dont, /* complain_on_overflow */
1450 NULL, /* special_function */
1451 "R_ARM_GNU_VTINHERIT", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456
1457 HOWTO (R_ARM_THM_JUMP11, /* type */
1458 1, /* rightshift */
1459 1, /* size (0 = byte, 1 = short, 2 = long) */
1460 11, /* bitsize */
1461 TRUE, /* pc_relative */
1462 0, /* bitpos */
1463 complain_overflow_signed, /* complain_on_overflow */
1464 bfd_elf_generic_reloc, /* special_function */
1465 "R_ARM_THM_JUMP11", /* name */
1466 FALSE, /* partial_inplace */
1467 0x000007ff, /* src_mask */
1468 0x000007ff, /* dst_mask */
1469 TRUE), /* pcrel_offset */
1470
1471 HOWTO (R_ARM_THM_JUMP8, /* type */
1472 1, /* rightshift */
1473 1, /* size (0 = byte, 1 = short, 2 = long) */
1474 8, /* bitsize */
1475 TRUE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_signed, /* complain_on_overflow */
1478 bfd_elf_generic_reloc, /* special_function */
1479 "R_ARM_THM_JUMP8", /* name */
1480 FALSE, /* partial_inplace */
1481 0x000000ff, /* src_mask */
1482 0x000000ff, /* dst_mask */
1483 TRUE), /* pcrel_offset */
1484
1485 /* TLS relocations */
1486 HOWTO (R_ARM_TLS_GD32, /* type */
1487 0, /* rightshift */
1488 2, /* size (0 = byte, 1 = short, 2 = long) */
1489 32, /* bitsize */
1490 FALSE, /* pc_relative */
1491 0, /* bitpos */
1492 complain_overflow_bitfield,/* complain_on_overflow */
1493 NULL, /* special_function */
1494 "R_ARM_TLS_GD32", /* name */
1495 TRUE, /* partial_inplace */
1496 0xffffffff, /* src_mask */
1497 0xffffffff, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1499
1500 HOWTO (R_ARM_TLS_LDM32, /* type */
1501 0, /* rightshift */
1502 2, /* size (0 = byte, 1 = short, 2 = long) */
1503 32, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_bitfield,/* complain_on_overflow */
1507 bfd_elf_generic_reloc, /* special_function */
1508 "R_ARM_TLS_LDM32", /* name */
1509 TRUE, /* partial_inplace */
1510 0xffffffff, /* src_mask */
1511 0xffffffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 HOWTO (R_ARM_TLS_LDO32, /* type */
1515 0, /* rightshift */
1516 2, /* size (0 = byte, 1 = short, 2 = long) */
1517 32, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_bitfield,/* complain_on_overflow */
1521 bfd_elf_generic_reloc, /* special_function */
1522 "R_ARM_TLS_LDO32", /* name */
1523 TRUE, /* partial_inplace */
1524 0xffffffff, /* src_mask */
1525 0xffffffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 HOWTO (R_ARM_TLS_IE32, /* type */
1529 0, /* rightshift */
1530 2, /* size (0 = byte, 1 = short, 2 = long) */
1531 32, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_bitfield,/* complain_on_overflow */
1535 NULL, /* special_function */
1536 "R_ARM_TLS_IE32", /* name */
1537 TRUE, /* partial_inplace */
1538 0xffffffff, /* src_mask */
1539 0xffffffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 HOWTO (R_ARM_TLS_LE32, /* type */
1543 0, /* rightshift */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1545 32, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_bitfield,/* complain_on_overflow */
1549 bfd_elf_generic_reloc, /* special_function */
1550 "R_ARM_TLS_LE32", /* name */
1551 TRUE, /* partial_inplace */
1552 0xffffffff, /* src_mask */
1553 0xffffffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 HOWTO (R_ARM_TLS_LDO12, /* type */
1557 0, /* rightshift */
1558 2, /* size (0 = byte, 1 = short, 2 = long) */
1559 12, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_bitfield,/* complain_on_overflow */
1563 bfd_elf_generic_reloc, /* special_function */
1564 "R_ARM_TLS_LDO12", /* name */
1565 FALSE, /* partial_inplace */
1566 0x00000fff, /* src_mask */
1567 0x00000fff, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 HOWTO (R_ARM_TLS_LE12, /* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 12, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_bitfield,/* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_ARM_TLS_LE12", /* name */
1579 FALSE, /* partial_inplace */
1580 0x00000fff, /* src_mask */
1581 0x00000fff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 HOWTO (R_ARM_TLS_IE12GP, /* type */
1585 0, /* rightshift */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1587 12, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_bitfield,/* complain_on_overflow */
1591 bfd_elf_generic_reloc, /* special_function */
1592 "R_ARM_TLS_IE12GP", /* name */
1593 FALSE, /* partial_inplace */
1594 0x00000fff, /* src_mask */
1595 0x00000fff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597 };
1598
1599 /* 112-127 private relocations
1600 128 R_ARM_ME_TOO, obsolete
1601 129-255 unallocated in AAELF.
1602
1603 249-255 extended, currently unused, relocations: */
1604
1605 static reloc_howto_type elf32_arm_howto_table_2[4] =
1606 {
1607 HOWTO (R_ARM_RREL32, /* type */
1608 0, /* rightshift */
1609 0, /* size (0 = byte, 1 = short, 2 = long) */
1610 0, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont,/* complain_on_overflow */
1614 bfd_elf_generic_reloc, /* special_function */
1615 "R_ARM_RREL32", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 HOWTO (R_ARM_RABS32, /* type */
1622 0, /* rightshift */
1623 0, /* size (0 = byte, 1 = short, 2 = long) */
1624 0, /* bitsize */
1625 FALSE, /* pc_relative */
1626 0, /* bitpos */
1627 complain_overflow_dont,/* complain_on_overflow */
1628 bfd_elf_generic_reloc, /* special_function */
1629 "R_ARM_RABS32", /* name */
1630 FALSE, /* partial_inplace */
1631 0, /* src_mask */
1632 0, /* dst_mask */
1633 FALSE), /* pcrel_offset */
1634
1635 HOWTO (R_ARM_RPC24, /* type */
1636 0, /* rightshift */
1637 0, /* size (0 = byte, 1 = short, 2 = long) */
1638 0, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont,/* complain_on_overflow */
1642 bfd_elf_generic_reloc, /* special_function */
1643 "R_ARM_RPC24", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 HOWTO (R_ARM_RBASE, /* type */
1650 0, /* rightshift */
1651 0, /* size (0 = byte, 1 = short, 2 = long) */
1652 0, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont,/* complain_on_overflow */
1656 bfd_elf_generic_reloc, /* special_function */
1657 "R_ARM_RBASE", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0, /* dst_mask */
1661 FALSE) /* pcrel_offset */
1662 };
1663
1664 static reloc_howto_type *
1665 elf32_arm_howto_from_type (unsigned int r_type)
1666 {
1667 if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
1668 return &elf32_arm_howto_table_1[r_type];
1669
1670 if (r_type >= R_ARM_RREL32
1671 && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_2))
1672 return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32];
1673
1674 return NULL;
1675 }
1676
1677 static void
1678 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1679 Elf_Internal_Rela * elf_reloc)
1680 {
1681 unsigned int r_type;
1682
1683 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1684 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1685 }
1686
1687 struct elf32_arm_reloc_map
1688 {
1689 bfd_reloc_code_real_type bfd_reloc_val;
1690 unsigned char elf_reloc_val;
1691 };
1692
1693 /* All entries in this list must also be present in elf32_arm_howto_table. */
1694 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1695 {
1696 {BFD_RELOC_NONE, R_ARM_NONE},
1697 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1698 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1699 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1700 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1701 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1702 {BFD_RELOC_32, R_ARM_ABS32},
1703 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1704 {BFD_RELOC_8, R_ARM_ABS8},
1705 {BFD_RELOC_16, R_ARM_ABS16},
1706 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1707 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1708 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1709 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1710 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1711 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1712 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1713 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1714 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1715 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1716 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1717 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1718 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1719 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1720 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1721 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1722 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1723 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1724 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1725 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1726 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1727 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1728 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1729 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1730 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1731 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1732 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1733 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1734 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1735 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1736 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1737 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1738 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1739 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1740 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1741 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1742 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1743 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1744 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1745 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1746 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1747 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1748 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1749 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1750 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1751 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1752 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1753 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1754 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1755 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1756 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1757 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1758 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1759 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1760 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1761 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1762 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1763 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1764 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1765 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1766 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1767 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1768 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1769 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1770 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1771 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1772 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
1773 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX}
1774 };
1775
1776 static reloc_howto_type *
1777 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1778 bfd_reloc_code_real_type code)
1779 {
1780 unsigned int i;
1781
1782 for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++)
1783 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1784 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1785
1786 return NULL;
1787 }
1788
1789 static reloc_howto_type *
1790 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1791 const char *r_name)
1792 {
1793 unsigned int i;
1794
1795 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); i++)
1796 if (elf32_arm_howto_table_1[i].name != NULL
1797 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1798 return &elf32_arm_howto_table_1[i];
1799
1800 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++)
1801 if (elf32_arm_howto_table_2[i].name != NULL
1802 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1803 return &elf32_arm_howto_table_2[i];
1804
1805 return NULL;
1806 }
1807
1808 /* Support for core dump NOTE sections. */
1809
1810 static bfd_boolean
1811 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1812 {
1813 int offset;
1814 size_t size;
1815
1816 switch (note->descsz)
1817 {
1818 default:
1819 return FALSE;
1820
1821 case 148: /* Linux/ARM 32-bit. */
1822 /* pr_cursig */
1823 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1824
1825 /* pr_pid */
1826 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1827
1828 /* pr_reg */
1829 offset = 72;
1830 size = 72;
1831
1832 break;
1833 }
1834
1835 /* Make a ".reg/999" section. */
1836 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1837 size, note->descpos + offset);
1838 }
1839
1840 static bfd_boolean
1841 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1842 {
1843 switch (note->descsz)
1844 {
1845 default:
1846 return FALSE;
1847
1848 case 124: /* Linux/ARM elf_prpsinfo. */
1849 elf_tdata (abfd)->core_program
1850 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1851 elf_tdata (abfd)->core_command
1852 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1853 }
1854
1855 /* Note that for some reason, a spurious space is tacked
1856 onto the end of the args in some (at least one anyway)
1857 implementations, so strip it off if it exists. */
1858 {
1859 char *command = elf_tdata (abfd)->core_command;
1860 int n = strlen (command);
1861
1862 if (0 < n && command[n - 1] == ' ')
1863 command[n - 1] = '\0';
1864 }
1865
1866 return TRUE;
1867 }
1868
1869 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1870 #define TARGET_LITTLE_NAME "elf32-littlearm"
1871 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1872 #define TARGET_BIG_NAME "elf32-bigarm"
1873
1874 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1875 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1876
1877 typedef unsigned long int insn32;
1878 typedef unsigned short int insn16;
1879
1880 /* In lieu of proper flags, assume all EABIv4 or later objects are
1881 interworkable. */
1882 #define INTERWORK_FLAG(abfd) \
1883 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1884 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1885
1886 /* The linker script knows the section names for placement.
1887 The entry_names are used to do simple name mangling on the stubs.
1888 Given a function name, and its type, the stub can be found. The
1889 name can be changed. The only requirement is the %s be present. */
1890 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1891 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1892
1893 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1894 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1895
1896 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1897 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1898
1899 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
1900 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
1901
1902 #define STUB_ENTRY_NAME "__%s_veneer"
1903
1904 /* The name of the dynamic interpreter. This is put in the .interp
1905 section. */
1906 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1907
1908 #ifdef FOUR_WORD_PLT
1909
1910 /* The first entry in a procedure linkage table looks like
1911 this. It is set up so that any shared library function that is
1912 called before the relocation has been set up calls the dynamic
1913 linker first. */
1914 static const bfd_vma elf32_arm_plt0_entry [] =
1915 {
1916 0xe52de004, /* str lr, [sp, #-4]! */
1917 0xe59fe010, /* ldr lr, [pc, #16] */
1918 0xe08fe00e, /* add lr, pc, lr */
1919 0xe5bef008, /* ldr pc, [lr, #8]! */
1920 };
1921
1922 /* Subsequent entries in a procedure linkage table look like
1923 this. */
1924 static const bfd_vma elf32_arm_plt_entry [] =
1925 {
1926 0xe28fc600, /* add ip, pc, #NN */
1927 0xe28cca00, /* add ip, ip, #NN */
1928 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1929 0x00000000, /* unused */
1930 };
1931
1932 #else
1933
1934 /* The first entry in a procedure linkage table looks like
1935 this. It is set up so that any shared library function that is
1936 called before the relocation has been set up calls the dynamic
1937 linker first. */
1938 static const bfd_vma elf32_arm_plt0_entry [] =
1939 {
1940 0xe52de004, /* str lr, [sp, #-4]! */
1941 0xe59fe004, /* ldr lr, [pc, #4] */
1942 0xe08fe00e, /* add lr, pc, lr */
1943 0xe5bef008, /* ldr pc, [lr, #8]! */
1944 0x00000000, /* &GOT[0] - . */
1945 };
1946
1947 /* Subsequent entries in a procedure linkage table look like
1948 this. */
1949 static const bfd_vma elf32_arm_plt_entry [] =
1950 {
1951 0xe28fc600, /* add ip, pc, #0xNN00000 */
1952 0xe28cca00, /* add ip, ip, #0xNN000 */
1953 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1954 };
1955
1956 #endif
1957
1958 /* The format of the first entry in the procedure linkage table
1959 for a VxWorks executable. */
1960 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1961 {
1962 0xe52dc008, /* str ip,[sp,#-8]! */
1963 0xe59fc000, /* ldr ip,[pc] */
1964 0xe59cf008, /* ldr pc,[ip,#8] */
1965 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1966 };
1967
1968 /* The format of subsequent entries in a VxWorks executable. */
1969 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1970 {
1971 0xe59fc000, /* ldr ip,[pc] */
1972 0xe59cf000, /* ldr pc,[ip] */
1973 0x00000000, /* .long @got */
1974 0xe59fc000, /* ldr ip,[pc] */
1975 0xea000000, /* b _PLT */
1976 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1977 };
1978
1979 /* The format of entries in a VxWorks shared library. */
1980 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1981 {
1982 0xe59fc000, /* ldr ip,[pc] */
1983 0xe79cf009, /* ldr pc,[ip,r9] */
1984 0x00000000, /* .long @got */
1985 0xe59fc000, /* ldr ip,[pc] */
1986 0xe599f008, /* ldr pc,[r9,#8] */
1987 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1988 };
1989
1990 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1991 #define PLT_THUMB_STUB_SIZE 4
1992 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1993 {
1994 0x4778, /* bx pc */
1995 0x46c0 /* nop */
1996 };
1997
1998 /* The entries in a PLT when using a DLL-based target with multiple
1999 address spaces. */
2000 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2001 {
2002 0xe51ff004, /* ldr pc, [pc, #-4] */
2003 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2004 };
2005
2006 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2007 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2008 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2009 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2010 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2011 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2012
2013 static const bfd_vma arm_long_branch_stub[] =
2014 {
2015 0xe51ff004, /* ldr pc, [pc, #-4] */
2016 0x00000000, /* dcd R_ARM_ABS32(X) */
2017 };
2018
2019 static const bfd_vma arm_thumb_v4t_long_branch_stub[] =
2020 {
2021 0xe59fc000, /* ldr ip, [pc, #0] */
2022 0xe12fff1c, /* bx ip */
2023 0x00000000, /* dcd R_ARM_ABS32(X) */
2024 };
2025
2026 static const bfd_vma arm_thumb_thumb_long_branch_stub[] =
2027 {
2028 0x4e02b540, /* push {r6, lr} */
2029 /* ldr r6, [pc, #8] */
2030 0x473046fe, /* mov lr, pc */
2031 /* bx r6 */
2032 0xbf00bd40, /* pop {r6, pc} */
2033 /* nop */
2034 0x00000000, /* dcd R_ARM_ABS32(X) */
2035 };
2036
2037 static const bfd_vma arm_thumb_arm_v4t_long_branch_stub[] =
2038 {
2039 0x4e03b540, /* push {r6, lr} */
2040 /* ldr r6, [pc, #12] */
2041 0x473046fe, /* mov lr, pc */
2042 /* bx r6 */
2043 0xe8bd4040, /* pop {r6, pc} */
2044 0xe12fff1e, /* bx lr */
2045 0x00000000, /* dcd R_ARM_ABS32(X) */
2046 };
2047
2048 static const bfd_vma arm_thumb_arm_v4t_short_branch_stub[] =
2049 {
2050 0x46c04778, /* bx pc */
2051 /* nop */
2052 0xea000000, /* b (X) */
2053 };
2054
2055 static const bfd_vma arm_pic_long_branch_stub[] =
2056 {
2057 0xe59fc000, /* ldr r12, [pc] */
2058 0xe08ff00c, /* add pc, pc, ip */
2059 0x00000000, /* dcd R_ARM_REL32(X) */
2060 };
2061
2062 /* Section name for stubs is the associated section name plus this
2063 string. */
2064 #define STUB_SUFFIX ".stub"
2065
2066 enum elf32_arm_stub_type
2067 {
2068 arm_stub_none,
2069 arm_stub_long_branch,
2070 arm_thumb_v4t_stub_long_branch,
2071 arm_thumb_thumb_stub_long_branch,
2072 arm_thumb_arm_v4t_stub_long_branch,
2073 arm_thumb_arm_v4t_stub_short_branch,
2074 arm_stub_pic_long_branch,
2075 };
2076
2077 struct elf32_arm_stub_hash_entry
2078 {
2079 /* Base hash table entry structure. */
2080 struct bfd_hash_entry root;
2081
2082 /* The stub section. */
2083 asection *stub_sec;
2084
2085 /* Offset within stub_sec of the beginning of this stub. */
2086 bfd_vma stub_offset;
2087
2088 /* Given the symbol's value and its section we can determine its final
2089 value when building the stubs (so the stub knows where to jump). */
2090 bfd_vma target_value;
2091 asection *target_section;
2092
2093 enum elf32_arm_stub_type stub_type;
2094
2095 /* The symbol table entry, if any, that this was derived from. */
2096 struct elf32_arm_link_hash_entry *h;
2097
2098 /* Destination symbol type (STT_ARM_TFUNC, ...) */
2099 unsigned char st_type;
2100
2101 /* Where this stub is being called from, or, in the case of combined
2102 stub sections, the first input section in the group. */
2103 asection *id_sec;
2104
2105 /* The name for the local symbol at the start of this stub. The
2106 stub name in the hash table has to be unique; this does not, so
2107 it can be friendlier. */
2108 char *output_name;
2109 };
2110
2111 /* Used to build a map of a section. This is required for mixed-endian
2112 code/data. */
2113
2114 typedef struct elf32_elf_section_map
2115 {
2116 bfd_vma vma;
2117 char type;
2118 }
2119 elf32_arm_section_map;
2120
2121 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2122
2123 typedef enum
2124 {
2125 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2126 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2127 VFP11_ERRATUM_ARM_VENEER,
2128 VFP11_ERRATUM_THUMB_VENEER
2129 }
2130 elf32_vfp11_erratum_type;
2131
2132 typedef struct elf32_vfp11_erratum_list
2133 {
2134 struct elf32_vfp11_erratum_list *next;
2135 bfd_vma vma;
2136 union
2137 {
2138 struct
2139 {
2140 struct elf32_vfp11_erratum_list *veneer;
2141 unsigned int vfp_insn;
2142 } b;
2143 struct
2144 {
2145 struct elf32_vfp11_erratum_list *branch;
2146 unsigned int id;
2147 } v;
2148 } u;
2149 elf32_vfp11_erratum_type type;
2150 }
2151 elf32_vfp11_erratum_list;
2152
2153 typedef struct _arm_elf_section_data
2154 {
2155 struct bfd_elf_section_data elf;
2156 unsigned int mapcount;
2157 unsigned int mapsize;
2158 elf32_arm_section_map *map;
2159 unsigned int erratumcount;
2160 elf32_vfp11_erratum_list *erratumlist;
2161 }
2162 _arm_elf_section_data;
2163
2164 #define elf32_arm_section_data(sec) \
2165 ((_arm_elf_section_data *) elf_section_data (sec))
2166
2167 /* The size of the thread control block. */
2168 #define TCB_SIZE 8
2169
2170 struct elf_arm_obj_tdata
2171 {
2172 struct elf_obj_tdata root;
2173
2174 /* tls_type for each local got entry. */
2175 char *local_got_tls_type;
2176
2177 /* Zero to warn when linking objects with incompatible enum sizes. */
2178 int no_enum_size_warning;
2179
2180 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2181 int no_wchar_size_warning;
2182 };
2183
2184 #define elf_arm_tdata(bfd) \
2185 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2186
2187 #define elf32_arm_local_got_tls_type(bfd) \
2188 (elf_arm_tdata (bfd)->local_got_tls_type)
2189
2190 #define is_arm_elf(bfd) \
2191 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2192 && elf_tdata (bfd) != NULL \
2193 && elf_object_id (bfd) == ARM_ELF_TDATA)
2194
2195 static bfd_boolean
2196 elf32_arm_mkobject (bfd *abfd)
2197 {
2198 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2199 ARM_ELF_TDATA);
2200 }
2201
2202 /* The ARM linker needs to keep track of the number of relocs that it
2203 decides to copy in check_relocs for each symbol. This is so that
2204 it can discard PC relative relocs if it doesn't need them when
2205 linking with -Bsymbolic. We store the information in a field
2206 extending the regular ELF linker hash table. */
2207
2208 /* This structure keeps track of the number of relocs we have copied
2209 for a given symbol. */
2210 struct elf32_arm_relocs_copied
2211 {
2212 /* Next section. */
2213 struct elf32_arm_relocs_copied * next;
2214 /* A section in dynobj. */
2215 asection * section;
2216 /* Number of relocs copied in this section. */
2217 bfd_size_type count;
2218 /* Number of PC-relative relocs copied in this section. */
2219 bfd_size_type pc_count;
2220 };
2221
2222 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2223
2224 /* Arm ELF linker hash entry. */
2225 struct elf32_arm_link_hash_entry
2226 {
2227 struct elf_link_hash_entry root;
2228
2229 /* Number of PC relative relocs copied for this symbol. */
2230 struct elf32_arm_relocs_copied * relocs_copied;
2231
2232 /* We reference count Thumb references to a PLT entry separately,
2233 so that we can emit the Thumb trampoline only if needed. */
2234 bfd_signed_vma plt_thumb_refcount;
2235
2236 /* Some references from Thumb code may be eliminated by BL->BLX
2237 conversion, so record them separately. */
2238 bfd_signed_vma plt_maybe_thumb_refcount;
2239
2240 /* Since PLT entries have variable size if the Thumb prologue is
2241 used, we need to record the index into .got.plt instead of
2242 recomputing it from the PLT offset. */
2243 bfd_signed_vma plt_got_offset;
2244
2245 #define GOT_UNKNOWN 0
2246 #define GOT_NORMAL 1
2247 #define GOT_TLS_GD 2
2248 #define GOT_TLS_IE 4
2249 unsigned char tls_type;
2250
2251 /* The symbol marking the real symbol location for exported thumb
2252 symbols with Arm stubs. */
2253 struct elf_link_hash_entry *export_glue;
2254
2255 /* A pointer to the most recently used stub hash entry against this
2256 symbol. */
2257 struct elf32_arm_stub_hash_entry *stub_cache;
2258 };
2259
2260 /* Traverse an arm ELF linker hash table. */
2261 #define elf32_arm_link_hash_traverse(table, func, info) \
2262 (elf_link_hash_traverse \
2263 (&(table)->root, \
2264 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2265 (info)))
2266
2267 /* Get the ARM elf linker hash table from a link_info structure. */
2268 #define elf32_arm_hash_table(info) \
2269 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2270
2271 #define arm_stub_hash_lookup(table, string, create, copy) \
2272 ((struct elf32_arm_stub_hash_entry *) \
2273 bfd_hash_lookup ((table), (string), (create), (copy)))
2274
2275 /* ARM ELF linker hash table. */
2276 struct elf32_arm_link_hash_table
2277 {
2278 /* The main hash table. */
2279 struct elf_link_hash_table root;
2280
2281 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2282 bfd_size_type thumb_glue_size;
2283
2284 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2285 bfd_size_type arm_glue_size;
2286
2287 /* The size in bytes of section containing the ARMv4 BX veneers. */
2288 bfd_size_type bx_glue_size;
2289
2290 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2291 veneer has been populated. */
2292 bfd_vma bx_glue_offset[15];
2293
2294 /* The size in bytes of the section containing glue for VFP11 erratum
2295 veneers. */
2296 bfd_size_type vfp11_erratum_glue_size;
2297
2298 /* An arbitrary input BFD chosen to hold the glue sections. */
2299 bfd * bfd_of_glue_owner;
2300
2301 /* Nonzero to output a BE8 image. */
2302 int byteswap_code;
2303
2304 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2305 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2306 int target1_is_rel;
2307
2308 /* The relocation to use for R_ARM_TARGET2 relocations. */
2309 int target2_reloc;
2310
2311 /* 0 = Ignore R_ARM_V4BX.
2312 1 = Convert BX to MOV PC.
2313 2 = Generate v4 interworing stubs. */
2314 int fix_v4bx;
2315
2316 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2317 int use_blx;
2318
2319 /* What sort of code sequences we should look for which may trigger the
2320 VFP11 denorm erratum. */
2321 bfd_arm_vfp11_fix vfp11_fix;
2322
2323 /* Global counter for the number of fixes we have emitted. */
2324 int num_vfp11_fixes;
2325
2326 /* Nonzero to force PIC branch veneers. */
2327 int pic_veneer;
2328
2329 /* The number of bytes in the initial entry in the PLT. */
2330 bfd_size_type plt_header_size;
2331
2332 /* The number of bytes in the subsequent PLT etries. */
2333 bfd_size_type plt_entry_size;
2334
2335 /* True if the target system is VxWorks. */
2336 int vxworks_p;
2337
2338 /* True if the target system is Symbian OS. */
2339 int symbian_p;
2340
2341 /* True if the target uses REL relocations. */
2342 int use_rel;
2343
2344 /* Short-cuts to get to dynamic linker sections. */
2345 asection *sgot;
2346 asection *sgotplt;
2347 asection *srelgot;
2348 asection *splt;
2349 asection *srelplt;
2350 asection *sdynbss;
2351 asection *srelbss;
2352
2353 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2354 asection *srelplt2;
2355
2356 /* Data for R_ARM_TLS_LDM32 relocations. */
2357 union
2358 {
2359 bfd_signed_vma refcount;
2360 bfd_vma offset;
2361 } tls_ldm_got;
2362
2363 /* Small local sym to section mapping cache. */
2364 struct sym_sec_cache sym_sec;
2365
2366 /* For convenience in allocate_dynrelocs. */
2367 bfd * obfd;
2368
2369 /* The stub hash table. */
2370 struct bfd_hash_table stub_hash_table;
2371
2372 /* Linker stub bfd. */
2373 bfd *stub_bfd;
2374
2375 /* Linker call-backs. */
2376 asection * (*add_stub_section) (const char *, asection *);
2377 void (*layout_sections_again) (void);
2378
2379 /* Array to keep track of which stub sections have been created, and
2380 information on stub grouping. */
2381 struct map_stub
2382 {
2383 /* This is the section to which stubs in the group will be
2384 attached. */
2385 asection *link_sec;
2386 /* The stub section. */
2387 asection *stub_sec;
2388 } *stub_group;
2389
2390 /* Assorted information used by elf32_arm_size_stubs. */
2391 unsigned int bfd_count;
2392 int top_index;
2393 asection **input_list;
2394 };
2395
2396 /* Create an entry in an ARM ELF linker hash table. */
2397
2398 static struct bfd_hash_entry *
2399 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2400 struct bfd_hash_table * table,
2401 const char * string)
2402 {
2403 struct elf32_arm_link_hash_entry * ret =
2404 (struct elf32_arm_link_hash_entry *) entry;
2405
2406 /* Allocate the structure if it has not already been allocated by a
2407 subclass. */
2408 if (ret == NULL)
2409 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2410 if (ret == NULL)
2411 return (struct bfd_hash_entry *) ret;
2412
2413 /* Call the allocation method of the superclass. */
2414 ret = ((struct elf32_arm_link_hash_entry *)
2415 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2416 table, string));
2417 if (ret != NULL)
2418 {
2419 ret->relocs_copied = NULL;
2420 ret->tls_type = GOT_UNKNOWN;
2421 ret->plt_thumb_refcount = 0;
2422 ret->plt_maybe_thumb_refcount = 0;
2423 ret->plt_got_offset = -1;
2424 ret->export_glue = NULL;
2425
2426 ret->stub_cache = NULL;
2427 }
2428
2429 return (struct bfd_hash_entry *) ret;
2430 }
2431
2432 /* Initialize an entry in the stub hash table. */
2433
2434 static struct bfd_hash_entry *
2435 stub_hash_newfunc (struct bfd_hash_entry *entry,
2436 struct bfd_hash_table *table,
2437 const char *string)
2438 {
2439 /* Allocate the structure if it has not already been allocated by a
2440 subclass. */
2441 if (entry == NULL)
2442 {
2443 entry = bfd_hash_allocate (table,
2444 sizeof (struct elf32_arm_stub_hash_entry));
2445 if (entry == NULL)
2446 return entry;
2447 }
2448
2449 /* Call the allocation method of the superclass. */
2450 entry = bfd_hash_newfunc (entry, table, string);
2451 if (entry != NULL)
2452 {
2453 struct elf32_arm_stub_hash_entry *eh;
2454
2455 /* Initialize the local fields. */
2456 eh = (struct elf32_arm_stub_hash_entry *) entry;
2457 eh->stub_sec = NULL;
2458 eh->stub_offset = 0;
2459 eh->target_value = 0;
2460 eh->target_section = NULL;
2461 eh->stub_type = arm_stub_none;
2462 eh->h = NULL;
2463 eh->id_sec = NULL;
2464 }
2465
2466 return entry;
2467 }
2468
2469 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2470 shortcuts to them in our hash table. */
2471
2472 static bfd_boolean
2473 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2474 {
2475 struct elf32_arm_link_hash_table *htab;
2476
2477 htab = elf32_arm_hash_table (info);
2478 /* BPABI objects never have a GOT, or associated sections. */
2479 if (htab->symbian_p)
2480 return TRUE;
2481
2482 if (! _bfd_elf_create_got_section (dynobj, info))
2483 return FALSE;
2484
2485 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2486 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2487 if (!htab->sgot || !htab->sgotplt)
2488 abort ();
2489
2490 htab->srelgot = bfd_make_section_with_flags (dynobj,
2491 RELOC_SECTION (htab, ".got"),
2492 (SEC_ALLOC | SEC_LOAD
2493 | SEC_HAS_CONTENTS
2494 | SEC_IN_MEMORY
2495 | SEC_LINKER_CREATED
2496 | SEC_READONLY));
2497 if (htab->srelgot == NULL
2498 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2499 return FALSE;
2500 return TRUE;
2501 }
2502
2503 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2504 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2505 hash table. */
2506
2507 static bfd_boolean
2508 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2509 {
2510 struct elf32_arm_link_hash_table *htab;
2511
2512 htab = elf32_arm_hash_table (info);
2513 if (!htab->sgot && !create_got_section (dynobj, info))
2514 return FALSE;
2515
2516 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2517 return FALSE;
2518
2519 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2520 htab->srelplt = bfd_get_section_by_name (dynobj,
2521 RELOC_SECTION (htab, ".plt"));
2522 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2523 if (!info->shared)
2524 htab->srelbss = bfd_get_section_by_name (dynobj,
2525 RELOC_SECTION (htab, ".bss"));
2526
2527 if (htab->vxworks_p)
2528 {
2529 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2530 return FALSE;
2531
2532 if (info->shared)
2533 {
2534 htab->plt_header_size = 0;
2535 htab->plt_entry_size
2536 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2537 }
2538 else
2539 {
2540 htab->plt_header_size
2541 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2542 htab->plt_entry_size
2543 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2544 }
2545 }
2546
2547 if (!htab->splt
2548 || !htab->srelplt
2549 || !htab->sdynbss
2550 || (!info->shared && !htab->srelbss))
2551 abort ();
2552
2553 return TRUE;
2554 }
2555
2556 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2557
2558 static void
2559 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2560 struct elf_link_hash_entry *dir,
2561 struct elf_link_hash_entry *ind)
2562 {
2563 struct elf32_arm_link_hash_entry *edir, *eind;
2564
2565 edir = (struct elf32_arm_link_hash_entry *) dir;
2566 eind = (struct elf32_arm_link_hash_entry *) ind;
2567
2568 if (eind->relocs_copied != NULL)
2569 {
2570 if (edir->relocs_copied != NULL)
2571 {
2572 struct elf32_arm_relocs_copied **pp;
2573 struct elf32_arm_relocs_copied *p;
2574
2575 /* Add reloc counts against the indirect sym to the direct sym
2576 list. Merge any entries against the same section. */
2577 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2578 {
2579 struct elf32_arm_relocs_copied *q;
2580
2581 for (q = edir->relocs_copied; q != NULL; q = q->next)
2582 if (q->section == p->section)
2583 {
2584 q->pc_count += p->pc_count;
2585 q->count += p->count;
2586 *pp = p->next;
2587 break;
2588 }
2589 if (q == NULL)
2590 pp = &p->next;
2591 }
2592 *pp = edir->relocs_copied;
2593 }
2594
2595 edir->relocs_copied = eind->relocs_copied;
2596 eind->relocs_copied = NULL;
2597 }
2598
2599 if (ind->root.type == bfd_link_hash_indirect)
2600 {
2601 /* Copy over PLT info. */
2602 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2603 eind->plt_thumb_refcount = 0;
2604 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
2605 eind->plt_maybe_thumb_refcount = 0;
2606
2607 if (dir->got.refcount <= 0)
2608 {
2609 edir->tls_type = eind->tls_type;
2610 eind->tls_type = GOT_UNKNOWN;
2611 }
2612 }
2613
2614 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2615 }
2616
2617 /* Create an ARM elf linker hash table. */
2618
2619 static struct bfd_link_hash_table *
2620 elf32_arm_link_hash_table_create (bfd *abfd)
2621 {
2622 struct elf32_arm_link_hash_table *ret;
2623 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2624
2625 ret = bfd_malloc (amt);
2626 if (ret == NULL)
2627 return NULL;
2628
2629 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2630 elf32_arm_link_hash_newfunc,
2631 sizeof (struct elf32_arm_link_hash_entry)))
2632 {
2633 free (ret);
2634 return NULL;
2635 }
2636
2637 ret->sgot = NULL;
2638 ret->sgotplt = NULL;
2639 ret->srelgot = NULL;
2640 ret->splt = NULL;
2641 ret->srelplt = NULL;
2642 ret->sdynbss = NULL;
2643 ret->srelbss = NULL;
2644 ret->srelplt2 = NULL;
2645 ret->thumb_glue_size = 0;
2646 ret->arm_glue_size = 0;
2647 ret->bx_glue_size = 0;
2648 memset (ret->bx_glue_offset, 0, sizeof (ret->bx_glue_offset));
2649 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2650 ret->vfp11_erratum_glue_size = 0;
2651 ret->num_vfp11_fixes = 0;
2652 ret->bfd_of_glue_owner = NULL;
2653 ret->byteswap_code = 0;
2654 ret->target1_is_rel = 0;
2655 ret->target2_reloc = R_ARM_NONE;
2656 #ifdef FOUR_WORD_PLT
2657 ret->plt_header_size = 16;
2658 ret->plt_entry_size = 16;
2659 #else
2660 ret->plt_header_size = 20;
2661 ret->plt_entry_size = 12;
2662 #endif
2663 ret->fix_v4bx = 0;
2664 ret->use_blx = 0;
2665 ret->vxworks_p = 0;
2666 ret->symbian_p = 0;
2667 ret->use_rel = 1;
2668 ret->sym_sec.abfd = NULL;
2669 ret->obfd = abfd;
2670 ret->tls_ldm_got.refcount = 0;
2671 ret->stub_bfd = NULL;
2672 ret->add_stub_section = NULL;
2673 ret->layout_sections_again = NULL;
2674 ret->stub_group = NULL;
2675 ret->bfd_count = 0;
2676 ret->top_index = 0;
2677 ret->input_list = NULL;
2678
2679 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2680 sizeof (struct elf32_arm_stub_hash_entry)))
2681 {
2682 free (ret);
2683 return NULL;
2684 }
2685
2686 return &ret->root.root;
2687 }
2688
2689 /* Free the derived linker hash table. */
2690
2691 static void
2692 elf32_arm_hash_table_free (struct bfd_link_hash_table *hash)
2693 {
2694 struct elf32_arm_link_hash_table *ret
2695 = (struct elf32_arm_link_hash_table *) hash;
2696
2697 bfd_hash_table_free (&ret->stub_hash_table);
2698 _bfd_generic_link_hash_table_free (hash);
2699 }
2700
2701 /* Determine if we're dealing with a Thumb only architecture. */
2702
2703 static bfd_boolean
2704 using_thumb_only (struct elf32_arm_link_hash_table *globals)
2705 {
2706 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2707 Tag_CPU_arch);
2708 int profile;
2709
2710 if (arch != TAG_CPU_ARCH_V7)
2711 return FALSE;
2712
2713 profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2714 Tag_CPU_arch_profile);
2715
2716 return profile == 'M';
2717 }
2718
2719 /* Determine if we're dealing with a Thumb-2 object. */
2720
2721 static bfd_boolean
2722 using_thumb2 (struct elf32_arm_link_hash_table *globals)
2723 {
2724 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2725 Tag_CPU_arch);
2726 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
2727 }
2728
2729 static bfd_boolean
2730 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
2731 {
2732 switch (stub_type)
2733 {
2734 case arm_thumb_thumb_stub_long_branch:
2735 case arm_thumb_arm_v4t_stub_long_branch:
2736 case arm_thumb_arm_v4t_stub_short_branch:
2737 return TRUE;
2738 case arm_stub_none:
2739 BFD_FAIL ();
2740 return FALSE;
2741 break;
2742 default:
2743 return FALSE;
2744 }
2745 }
2746
2747 /* Determine the type of stub needed, if any, for a call. */
2748
2749 static enum elf32_arm_stub_type
2750 arm_type_of_stub (struct bfd_link_info *info,
2751 asection *input_sec,
2752 const Elf_Internal_Rela *rel,
2753 unsigned char st_type,
2754 struct elf32_arm_link_hash_entry *hash,
2755 bfd_vma destination,
2756 asection *sym_sec,
2757 bfd *input_bfd,
2758 const char *name)
2759 {
2760 bfd_vma location;
2761 bfd_signed_vma branch_offset;
2762 unsigned int r_type;
2763 struct elf32_arm_link_hash_table * globals;
2764 int thumb2;
2765 int thumb_only;
2766 enum elf32_arm_stub_type stub_type = arm_stub_none;
2767
2768 /* We don't know the actual type of destination in case it is of
2769 type STT_SECTION: give up. */
2770 if (st_type == STT_SECTION)
2771 return stub_type;
2772
2773 globals = elf32_arm_hash_table (info);
2774
2775 thumb_only = using_thumb_only (globals);
2776
2777 thumb2 = using_thumb2 (globals);
2778
2779 /* Determine where the call point is. */
2780 location = (input_sec->output_offset
2781 + input_sec->output_section->vma
2782 + rel->r_offset);
2783
2784 branch_offset = (bfd_signed_vma)(destination - location);
2785
2786 r_type = ELF32_R_TYPE (rel->r_info);
2787
2788 /* If the call will go through a PLT entry then we do not need
2789 glue. */
2790 if (globals->splt != NULL && hash != NULL && hash->root.plt.offset != (bfd_vma) -1)
2791 return stub_type;
2792
2793 if (r_type == R_ARM_THM_CALL)
2794 {
2795 if ((!thumb2
2796 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
2797 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
2798 || (thumb2
2799 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
2800 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
2801 || ((st_type != STT_ARM_TFUNC) && !globals->use_blx))
2802 {
2803 if (st_type == STT_ARM_TFUNC)
2804 {
2805 /* Thumb to thumb. */
2806 if (!thumb_only)
2807 {
2808 stub_type = (info->shared | globals->pic_veneer)
2809 ? ((globals->use_blx)
2810 ? arm_stub_pic_long_branch
2811 : arm_stub_none)
2812 : (globals->use_blx)
2813 ? arm_stub_long_branch
2814 : arm_stub_none;
2815 }
2816 else
2817 {
2818 stub_type = (info->shared | globals->pic_veneer)
2819 ? arm_stub_none
2820 : (globals->use_blx)
2821 ? arm_thumb_thumb_stub_long_branch
2822 : arm_stub_none;
2823 }
2824 }
2825 else
2826 {
2827 /* Thumb to arm. */
2828 if (sym_sec != NULL
2829 && sym_sec->owner != NULL
2830 && !INTERWORK_FLAG (sym_sec->owner))
2831 {
2832 (*_bfd_error_handler)
2833 (_("%B(%s): warning: interworking not enabled.\n"
2834 " first occurrence: %B: Thumb call to ARM"),
2835 sym_sec->owner, input_bfd, name);
2836 }
2837
2838 stub_type = (info->shared | globals->pic_veneer)
2839 ? ((globals->use_blx)
2840 ? arm_stub_pic_long_branch
2841 : arm_stub_none)
2842 : (globals->use_blx)
2843 ? arm_stub_long_branch
2844 : arm_thumb_arm_v4t_stub_long_branch;
2845
2846 /* Handle v4t short branches. */
2847 if ((stub_type == arm_thumb_arm_v4t_stub_long_branch)
2848 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
2849 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
2850 stub_type = arm_thumb_arm_v4t_stub_short_branch;
2851 }
2852 }
2853 }
2854 else if (r_type == R_ARM_CALL)
2855 {
2856 if (st_type == STT_ARM_TFUNC)
2857 {
2858 /* Arm to thumb. */
2859
2860 if (sym_sec != NULL
2861 && sym_sec->owner != NULL
2862 && !INTERWORK_FLAG (sym_sec->owner))
2863 {
2864 (*_bfd_error_handler)
2865 (_("%B(%s): warning: interworking not enabled.\n"
2866 " first occurrence: %B: Thumb call to ARM"),
2867 sym_sec->owner, input_bfd, name);
2868 }
2869
2870 /* We have an extra 2-bytes reach because of
2871 the mode change (bit 24 (H) of BLX encoding). */
2872 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
2873 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
2874 || !globals->use_blx)
2875 {
2876 stub_type = (info->shared | globals->pic_veneer)
2877 ? arm_stub_pic_long_branch
2878 : (globals->use_blx)
2879 ? arm_stub_long_branch
2880 : arm_thumb_v4t_stub_long_branch;
2881 }
2882 }
2883 else
2884 {
2885 /* Arm to arm. */
2886 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
2887 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
2888 {
2889 stub_type = (info->shared | globals->pic_veneer)
2890 ? arm_stub_pic_long_branch
2891 : arm_stub_long_branch;
2892 }
2893 }
2894 }
2895
2896 return stub_type;
2897 }
2898
2899 /* Build a name for an entry in the stub hash table. */
2900
2901 static char *
2902 elf32_arm_stub_name (const asection *input_section,
2903 const asection *sym_sec,
2904 const struct elf32_arm_link_hash_entry *hash,
2905 const Elf_Internal_Rela *rel)
2906 {
2907 char *stub_name;
2908 bfd_size_type len;
2909
2910 if (hash)
2911 {
2912 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1;
2913 stub_name = bfd_malloc (len);
2914 if (stub_name != NULL)
2915 sprintf (stub_name, "%08x_%s+%x",
2916 input_section->id & 0xffffffff,
2917 hash->root.root.root.string,
2918 (int) rel->r_addend & 0xffffffff);
2919 }
2920 else
2921 {
2922 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
2923 stub_name = bfd_malloc (len);
2924 if (stub_name != NULL)
2925 sprintf (stub_name, "%08x_%x:%x+%x",
2926 input_section->id & 0xffffffff,
2927 sym_sec->id & 0xffffffff,
2928 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
2929 (int) rel->r_addend & 0xffffffff);
2930 }
2931
2932 return stub_name;
2933 }
2934
2935 /* Look up an entry in the stub hash. Stub entries are cached because
2936 creating the stub name takes a bit of time. */
2937
2938 static struct elf32_arm_stub_hash_entry *
2939 elf32_arm_get_stub_entry (const asection *input_section,
2940 const asection *sym_sec,
2941 struct elf_link_hash_entry *hash,
2942 const Elf_Internal_Rela *rel,
2943 struct elf32_arm_link_hash_table *htab)
2944 {
2945 struct elf32_arm_stub_hash_entry *stub_entry;
2946 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
2947 const asection *id_sec;
2948
2949 if ((input_section->flags & SEC_CODE) == 0)
2950 return NULL;
2951
2952 /* If this input section is part of a group of sections sharing one
2953 stub section, then use the id of the first section in the group.
2954 Stub names need to include a section id, as there may well be
2955 more than one stub used to reach say, printf, and we need to
2956 distinguish between them. */
2957 id_sec = htab->stub_group[input_section->id].link_sec;
2958
2959 if (h != NULL && h->stub_cache != NULL
2960 && h->stub_cache->h == h
2961 && h->stub_cache->id_sec == id_sec)
2962 {
2963 stub_entry = h->stub_cache;
2964 }
2965 else
2966 {
2967 char *stub_name;
2968
2969 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel);
2970 if (stub_name == NULL)
2971 return NULL;
2972
2973 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
2974 stub_name, FALSE, FALSE);
2975 if (h != NULL)
2976 h->stub_cache = stub_entry;
2977
2978 free (stub_name);
2979 }
2980
2981 return stub_entry;
2982 }
2983
2984 /* Add a new stub entry to the stub hash. Not all fields of the new
2985 stub entry are initialised. */
2986
2987 static struct elf32_arm_stub_hash_entry *
2988 elf32_arm_add_stub (const char *stub_name,
2989 asection *section,
2990 struct elf32_arm_link_hash_table *htab)
2991 {
2992 asection *link_sec;
2993 asection *stub_sec;
2994 struct elf32_arm_stub_hash_entry *stub_entry;
2995
2996 link_sec = htab->stub_group[section->id].link_sec;
2997 stub_sec = htab->stub_group[section->id].stub_sec;
2998 if (stub_sec == NULL)
2999 {
3000 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3001 if (stub_sec == NULL)
3002 {
3003 size_t namelen;
3004 bfd_size_type len;
3005 char *s_name;
3006
3007 namelen = strlen (link_sec->name);
3008 len = namelen + sizeof (STUB_SUFFIX);
3009 s_name = bfd_alloc (htab->stub_bfd, len);
3010 if (s_name == NULL)
3011 return NULL;
3012
3013 memcpy (s_name, link_sec->name, namelen);
3014 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3015 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3016 if (stub_sec == NULL)
3017 return NULL;
3018 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3019 }
3020 htab->stub_group[section->id].stub_sec = stub_sec;
3021 }
3022
3023 /* Enter this entry into the linker stub hash table. */
3024 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3025 TRUE, FALSE);
3026 if (stub_entry == NULL)
3027 {
3028 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3029 section->owner,
3030 stub_name);
3031 return NULL;
3032 }
3033
3034 stub_entry->stub_sec = stub_sec;
3035 stub_entry->stub_offset = 0;
3036 stub_entry->id_sec = link_sec;
3037
3038 return stub_entry;
3039 }
3040
3041 /* Store an Arm insn into an output section not processed by
3042 elf32_arm_write_section. */
3043
3044 static void
3045 put_arm_insn (struct elf32_arm_link_hash_table * htab,
3046 bfd * output_bfd, bfd_vma val, void * ptr)
3047 {
3048 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3049 bfd_putl32 (val, ptr);
3050 else
3051 bfd_putb32 (val, ptr);
3052 }
3053
3054 /* Store a 16-bit Thumb insn into an output section not processed by
3055 elf32_arm_write_section. */
3056
3057 static void
3058 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
3059 bfd * output_bfd, bfd_vma val, void * ptr)
3060 {
3061 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3062 bfd_putl16 (val, ptr);
3063 else
3064 bfd_putb16 (val, ptr);
3065 }
3066
3067 static bfd_boolean
3068 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
3069 void * in_arg)
3070 {
3071 struct elf32_arm_stub_hash_entry *stub_entry;
3072 struct bfd_link_info *info;
3073 struct elf32_arm_link_hash_table *htab;
3074 asection *stub_sec;
3075 bfd *stub_bfd;
3076 bfd_vma stub_addr;
3077 bfd_byte *loc;
3078 bfd_vma sym_value;
3079 int template_size;
3080 int size;
3081 const bfd_vma *template;
3082 int i;
3083 struct elf32_arm_link_hash_table * globals;
3084
3085 /* Massage our args to the form they really have. */
3086 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3087 info = (struct bfd_link_info *) in_arg;
3088
3089 globals = elf32_arm_hash_table (info);
3090
3091 htab = elf32_arm_hash_table (info);
3092 stub_sec = stub_entry->stub_sec;
3093
3094 /* Make a note of the offset within the stubs for this entry. */
3095 stub_entry->stub_offset = stub_sec->size;
3096 loc = stub_sec->contents + stub_entry->stub_offset;
3097
3098 stub_bfd = stub_sec->owner;
3099
3100 /* This is the address of the start of the stub. */
3101 stub_addr = stub_sec->output_section->vma + stub_sec->output_offset
3102 + stub_entry->stub_offset;
3103
3104 /* This is the address of the stub destination. */
3105 sym_value = (stub_entry->target_value
3106 + stub_entry->target_section->output_offset
3107 + stub_entry->target_section->output_section->vma);
3108
3109 switch (stub_entry->stub_type)
3110 {
3111 case arm_stub_long_branch:
3112 template = arm_long_branch_stub;
3113 template_size = (sizeof (arm_long_branch_stub) / sizeof (bfd_vma)) * 4;
3114 break;
3115 case arm_thumb_v4t_stub_long_branch:
3116 template = arm_thumb_v4t_long_branch_stub;
3117 template_size = (sizeof (arm_thumb_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3118 break;
3119 case arm_thumb_thumb_stub_long_branch:
3120 template = arm_thumb_thumb_long_branch_stub;
3121 template_size = (sizeof (arm_thumb_thumb_long_branch_stub) / sizeof (bfd_vma)) * 4;
3122 break;
3123 case arm_thumb_arm_v4t_stub_long_branch:
3124 template = arm_thumb_arm_v4t_long_branch_stub;
3125 template_size = (sizeof (arm_thumb_arm_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3126 break;
3127 case arm_thumb_arm_v4t_stub_short_branch:
3128 template = arm_thumb_arm_v4t_short_branch_stub;
3129 template_size = (sizeof(arm_thumb_arm_v4t_short_branch_stub) / sizeof (bfd_vma)) * 4;
3130 break;
3131 case arm_stub_pic_long_branch:
3132 template = arm_pic_long_branch_stub;
3133 template_size = (sizeof (arm_pic_long_branch_stub) / sizeof (bfd_vma)) * 4;
3134 break;
3135 default:
3136 BFD_FAIL ();
3137 return FALSE;
3138 }
3139
3140 size = 0;
3141 for (i = 0; i < (template_size / 4); i++)
3142 {
3143 /* A 0 pattern is a placeholder, every other pattern is an
3144 instruction. */
3145 if (template[i] != 0)
3146 put_arm_insn (globals, stub_bfd, template[i], loc + size);
3147 else
3148 bfd_put_32 (stub_bfd, template[i], loc + size);
3149
3150 size += 4;
3151 }
3152 stub_sec->size += size;
3153
3154 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3155 if (stub_entry->st_type == STT_ARM_TFUNC)
3156 sym_value |= 1;
3157
3158 switch (stub_entry->stub_type)
3159 {
3160 case arm_stub_long_branch:
3161 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3162 stub_bfd, stub_sec, stub_sec->contents,
3163 stub_entry->stub_offset + 4, sym_value, 0);
3164 break;
3165 case arm_thumb_v4t_stub_long_branch:
3166 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3167 stub_bfd, stub_sec, stub_sec->contents,
3168 stub_entry->stub_offset + 8, sym_value, 0);
3169 break;
3170 case arm_thumb_thumb_stub_long_branch:
3171 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3172 stub_bfd, stub_sec, stub_sec->contents,
3173 stub_entry->stub_offset + 12, sym_value, 0);
3174 break;
3175 case arm_thumb_arm_v4t_stub_long_branch:
3176 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3177 stub_bfd, stub_sec, stub_sec->contents,
3178 stub_entry->stub_offset + 16, sym_value, 0);
3179 break;
3180 case arm_thumb_arm_v4t_stub_short_branch:
3181 {
3182 long int rel_offset;
3183 static const insn32 t2a3_b_insn = 0xea000000;
3184
3185 rel_offset = sym_value - (stub_addr + 8 + 4);
3186
3187 put_arm_insn (globals, stub_bfd,
3188 (bfd_vma) t2a3_b_insn | ((rel_offset >> 2) & 0x00FFFFFF),
3189 loc + 4);
3190 }
3191 break;
3192
3193 case arm_stub_pic_long_branch:
3194 /* We want the value relative to the address 8 bytes from the
3195 start of the stub. */
3196 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_REL32),
3197 stub_bfd, stub_sec, stub_sec->contents,
3198 stub_entry->stub_offset + 8, sym_value, 0);
3199 break;
3200 default:
3201 break;
3202 }
3203
3204 return TRUE;
3205 }
3206
3207 /* As above, but don't actually build the stub. Just bump offset so
3208 we know stub section sizes. */
3209
3210 static bfd_boolean
3211 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
3212 void * in_arg)
3213 {
3214 struct elf32_arm_stub_hash_entry *stub_entry;
3215 struct elf32_arm_link_hash_table *htab;
3216 const bfd_vma *template;
3217 int template_size;
3218 int size;
3219 int i;
3220
3221 /* Massage our args to the form they really have. */
3222 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3223 htab = (struct elf32_arm_link_hash_table *) in_arg;
3224
3225 switch (stub_entry->stub_type)
3226 {
3227 case arm_stub_long_branch:
3228 template = arm_long_branch_stub;
3229 template_size = (sizeof (arm_long_branch_stub) / sizeof (bfd_vma)) * 4;
3230 break;
3231 case arm_thumb_v4t_stub_long_branch:
3232 template = arm_thumb_v4t_long_branch_stub;
3233 template_size = (sizeof (arm_thumb_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3234 break;
3235 case arm_thumb_thumb_stub_long_branch:
3236 template = arm_thumb_thumb_long_branch_stub;
3237 template_size = (sizeof (arm_thumb_thumb_long_branch_stub) / sizeof (bfd_vma)) * 4;
3238 break;
3239 case arm_thumb_arm_v4t_stub_long_branch:
3240 template = arm_thumb_arm_v4t_long_branch_stub;
3241 template_size = (sizeof (arm_thumb_arm_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3242 break;
3243 case arm_thumb_arm_v4t_stub_short_branch:
3244 template = arm_thumb_arm_v4t_short_branch_stub;
3245 template_size = (sizeof(arm_thumb_arm_v4t_short_branch_stub) / sizeof (bfd_vma)) * 4;
3246 break;
3247 case arm_stub_pic_long_branch:
3248 template = arm_pic_long_branch_stub;
3249 template_size = (sizeof (arm_pic_long_branch_stub) / sizeof (bfd_vma)) * 4;
3250 break;
3251 default:
3252 BFD_FAIL ();
3253 return FALSE;
3254 break;
3255 }
3256
3257 size = 0;
3258 for (i = 0; i < (template_size / 4); i++)
3259 size += 4;
3260 size = (size + 7) & ~7;
3261 stub_entry->stub_sec->size += size;
3262 return TRUE;
3263 }
3264
3265 /* External entry points for sizing and building linker stubs. */
3266
3267 /* Set up various things so that we can make a list of input sections
3268 for each output section included in the link. Returns -1 on error,
3269 0 when no stubs will be needed, and 1 on success. */
3270
3271 int
3272 elf32_arm_setup_section_lists (bfd *output_bfd,
3273 struct bfd_link_info *info)
3274 {
3275 bfd *input_bfd;
3276 unsigned int bfd_count;
3277 int top_id, top_index;
3278 asection *section;
3279 asection **input_list, **list;
3280 bfd_size_type amt;
3281 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3282
3283 if (! is_elf_hash_table (htab))
3284 return 0;
3285
3286 /* Count the number of input BFDs and find the top input section id. */
3287 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3288 input_bfd != NULL;
3289 input_bfd = input_bfd->link_next)
3290 {
3291 bfd_count += 1;
3292 for (section = input_bfd->sections;
3293 section != NULL;
3294 section = section->next)
3295 {
3296 if (top_id < section->id)
3297 top_id = section->id;
3298 }
3299 }
3300 htab->bfd_count = bfd_count;
3301
3302 amt = sizeof (struct map_stub) * (top_id + 1);
3303 htab->stub_group = bfd_zmalloc (amt);
3304 if (htab->stub_group == NULL)
3305 return -1;
3306
3307 /* We can't use output_bfd->section_count here to find the top output
3308 section index as some sections may have been removed, and
3309 _bfd_strip_section_from_output doesn't renumber the indices. */
3310 for (section = output_bfd->sections, top_index = 0;
3311 section != NULL;
3312 section = section->next)
3313 {
3314 if (top_index < section->index)
3315 top_index = section->index;
3316 }
3317
3318 htab->top_index = top_index;
3319 amt = sizeof (asection *) * (top_index + 1);
3320 input_list = bfd_malloc (amt);
3321 htab->input_list = input_list;
3322 if (input_list == NULL)
3323 return -1;
3324
3325 /* For sections we aren't interested in, mark their entries with a
3326 value we can check later. */
3327 list = input_list + top_index;
3328 do
3329 *list = bfd_abs_section_ptr;
3330 while (list-- != input_list);
3331
3332 for (section = output_bfd->sections;
3333 section != NULL;
3334 section = section->next)
3335 {
3336 if ((section->flags & SEC_CODE) != 0)
3337 input_list[section->index] = NULL;
3338 }
3339
3340 return 1;
3341 }
3342
3343 /* The linker repeatedly calls this function for each input section,
3344 in the order that input sections are linked into output sections.
3345 Build lists of input sections to determine groupings between which
3346 we may insert linker stubs. */
3347
3348 void
3349 elf32_arm_next_input_section (struct bfd_link_info *info,
3350 asection *isec)
3351 {
3352 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3353
3354 if (isec->output_section->index <= htab->top_index)
3355 {
3356 asection **list = htab->input_list + isec->output_section->index;
3357
3358 if (*list != bfd_abs_section_ptr)
3359 {
3360 /* Steal the link_sec pointer for our list. */
3361 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3362 /* This happens to make the list in reverse order,
3363 which is what we want. */
3364 PREV_SEC (isec) = *list;
3365 *list = isec;
3366 }
3367 }
3368 }
3369
3370 /* See whether we can group stub sections together. Grouping stub
3371 sections may result in fewer stubs. More importantly, we need to
3372 put all .init* and .fini* stubs at the beginning of the .init or
3373 .fini output sections respectively, because glibc splits the
3374 _init and _fini functions into multiple parts. Putting a stub in
3375 the middle of a function is not a good idea. */
3376
3377 static void
3378 group_sections (struct elf32_arm_link_hash_table *htab,
3379 bfd_size_type stub_group_size,
3380 bfd_boolean stubs_always_before_branch)
3381 {
3382 asection **list = htab->input_list + htab->top_index;
3383
3384 do
3385 {
3386 asection *tail = *list;
3387
3388 if (tail == bfd_abs_section_ptr)
3389 continue;
3390
3391 while (tail != NULL)
3392 {
3393 asection *curr;
3394 asection *prev;
3395 bfd_size_type total;
3396
3397 curr = tail;
3398 total = tail->size;
3399 while ((prev = PREV_SEC (curr)) != NULL
3400 && ((total += curr->output_offset - prev->output_offset)
3401 < stub_group_size))
3402 curr = prev;
3403
3404 /* OK, the size from the start of CURR to the end is less
3405 than stub_group_size and thus can be handled by one stub
3406 section. (Or the tail section is itself larger than
3407 stub_group_size, in which case we may be toast.)
3408 We should really be keeping track of the total size of
3409 stubs added here, as stubs contribute to the final output
3410 section size. */
3411 do
3412 {
3413 prev = PREV_SEC (tail);
3414 /* Set up this stub group. */
3415 htab->stub_group[tail->id].link_sec = curr;
3416 }
3417 while (tail != curr && (tail = prev) != NULL);
3418
3419 /* But wait, there's more! Input sections up to stub_group_size
3420 bytes before the stub section can be handled by it too. */
3421 if (!stubs_always_before_branch)
3422 {
3423 total = 0;
3424 while (prev != NULL
3425 && ((total += tail->output_offset - prev->output_offset)
3426 < stub_group_size))
3427 {
3428 tail = prev;
3429 prev = PREV_SEC (tail);
3430 htab->stub_group[tail->id].link_sec = curr;
3431 }
3432 }
3433 tail = prev;
3434 }
3435 }
3436 while (list-- != htab->input_list);
3437
3438 free (htab->input_list);
3439 #undef PREV_SEC
3440 }
3441
3442 /* Determine and set the size of the stub section for a final link.
3443
3444 The basic idea here is to examine all the relocations looking for
3445 PC-relative calls to a target that is unreachable with a "bl"
3446 instruction. */
3447
3448 bfd_boolean
3449 elf32_arm_size_stubs (bfd *output_bfd,
3450 bfd *stub_bfd,
3451 struct bfd_link_info *info,
3452 bfd_signed_vma group_size,
3453 asection * (*add_stub_section) (const char *, asection *),
3454 void (*layout_sections_again) (void))
3455 {
3456 bfd_size_type stub_group_size;
3457 bfd_boolean stubs_always_before_branch;
3458 bfd_boolean stub_changed = 0;
3459 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3460
3461 /* Propagate mach to stub bfd, because it may not have been
3462 finalized when we created stub_bfd. */
3463 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3464 bfd_get_mach (output_bfd));
3465
3466 /* Stash our params away. */
3467 htab->stub_bfd = stub_bfd;
3468 htab->add_stub_section = add_stub_section;
3469 htab->layout_sections_again = layout_sections_again;
3470 stubs_always_before_branch = group_size < 0;
3471 if (group_size < 0)
3472 stub_group_size = -group_size;
3473 else
3474 stub_group_size = group_size;
3475
3476 if (stub_group_size == 1)
3477 {
3478 /* Default values. */
3479 /* Thumb branch range is +-4MB has to be used as the default
3480 maximum size (a given section can contain both ARM and Thumb
3481 code, so the worst case has to be taken into account).
3482
3483 This value is 24K less than that, which allows for 2025
3484 12-byte stubs. If we exceed that, then we will fail to link.
3485 The user will have to relink with an explicit group size
3486 option. */
3487 stub_group_size = 4170000;
3488 }
3489
3490 group_sections (htab, stub_group_size, stubs_always_before_branch);
3491
3492 while (1)
3493 {
3494 bfd *input_bfd;
3495 unsigned int bfd_indx;
3496 asection *stub_sec;
3497
3498 for (input_bfd = info->input_bfds, bfd_indx = 0;
3499 input_bfd != NULL;
3500 input_bfd = input_bfd->link_next, bfd_indx++)
3501 {
3502 Elf_Internal_Shdr *symtab_hdr;
3503 asection *section;
3504 Elf_Internal_Sym *local_syms = NULL;
3505
3506 /* We'll need the symbol table in a second. */
3507 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3508 if (symtab_hdr->sh_info == 0)
3509 continue;
3510
3511 /* Walk over each section attached to the input bfd. */
3512 for (section = input_bfd->sections;
3513 section != NULL;
3514 section = section->next)
3515 {
3516 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3517
3518 /* If there aren't any relocs, then there's nothing more
3519 to do. */
3520 if ((section->flags & SEC_RELOC) == 0
3521 || section->reloc_count == 0
3522 || (section->flags & SEC_CODE) == 0)
3523 continue;
3524
3525 /* If this section is a link-once section that will be
3526 discarded, then don't create any stubs. */
3527 if (section->output_section == NULL
3528 || section->output_section->owner != output_bfd)
3529 continue;
3530
3531 /* Get the relocs. */
3532 internal_relocs
3533 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3534 NULL, info->keep_memory);
3535 if (internal_relocs == NULL)
3536 goto error_ret_free_local;
3537
3538 /* Now examine each relocation. */
3539 irela = internal_relocs;
3540 irelaend = irela + section->reloc_count;
3541 for (; irela < irelaend; irela++)
3542 {
3543 unsigned int r_type, r_indx;
3544 enum elf32_arm_stub_type stub_type;
3545 struct elf32_arm_stub_hash_entry *stub_entry;
3546 asection *sym_sec;
3547 bfd_vma sym_value;
3548 bfd_vma destination;
3549 struct elf32_arm_link_hash_entry *hash;
3550 const char *sym_name;
3551 char *stub_name;
3552 const asection *id_sec;
3553 unsigned char st_type;
3554
3555 r_type = ELF32_R_TYPE (irela->r_info);
3556 r_indx = ELF32_R_SYM (irela->r_info);
3557
3558 if (r_type >= (unsigned int) R_ARM_max)
3559 {
3560 bfd_set_error (bfd_error_bad_value);
3561 error_ret_free_internal:
3562 if (elf_section_data (section)->relocs == NULL)
3563 free (internal_relocs);
3564 goto error_ret_free_local;
3565 }
3566
3567 /* Only look for stubs on call instructions. */
3568 if ((r_type != (unsigned int) R_ARM_CALL)
3569 && (r_type != (unsigned int) R_ARM_THM_CALL))
3570 continue;
3571
3572 /* Now determine the call target, its name, value,
3573 section. */
3574 sym_sec = NULL;
3575 sym_value = 0;
3576 destination = 0;
3577 hash = NULL;
3578 sym_name = NULL;
3579 if (r_indx < symtab_hdr->sh_info)
3580 {
3581 /* It's a local symbol. */
3582 Elf_Internal_Sym *sym;
3583 Elf_Internal_Shdr *hdr;
3584
3585 if (local_syms == NULL)
3586 {
3587 local_syms
3588 = (Elf_Internal_Sym *) symtab_hdr->contents;
3589 if (local_syms == NULL)
3590 local_syms
3591 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3592 symtab_hdr->sh_info, 0,
3593 NULL, NULL, NULL);
3594 if (local_syms == NULL)
3595 goto error_ret_free_internal;
3596 }
3597
3598 sym = local_syms + r_indx;
3599 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3600 sym_sec = hdr->bfd_section;
3601 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3602 sym_value = sym->st_value;
3603 destination = (sym_value + irela->r_addend
3604 + sym_sec->output_offset
3605 + sym_sec->output_section->vma);
3606 st_type = ELF_ST_TYPE (sym->st_info);
3607 sym_name
3608 = bfd_elf_string_from_elf_section (input_bfd,
3609 symtab_hdr->sh_link,
3610 sym->st_name);
3611 }
3612 else
3613 {
3614 /* It's an external symbol. */
3615 int e_indx;
3616
3617 e_indx = r_indx - symtab_hdr->sh_info;
3618 hash = ((struct elf32_arm_link_hash_entry *)
3619 elf_sym_hashes (input_bfd)[e_indx]);
3620
3621 while (hash->root.root.type == bfd_link_hash_indirect
3622 || hash->root.root.type == bfd_link_hash_warning)
3623 hash = ((struct elf32_arm_link_hash_entry *)
3624 hash->root.root.u.i.link);
3625
3626 if (hash->root.root.type == bfd_link_hash_defined
3627 || hash->root.root.type == bfd_link_hash_defweak)
3628 {
3629 sym_sec = hash->root.root.u.def.section;
3630 sym_value = hash->root.root.u.def.value;
3631 if (sym_sec->output_section != NULL)
3632 destination = (sym_value + irela->r_addend
3633 + sym_sec->output_offset
3634 + sym_sec->output_section->vma);
3635 }
3636 else if (hash->root.root.type == bfd_link_hash_undefweak
3637 || hash->root.root.type == bfd_link_hash_undefined)
3638 /* For a shared library, these will need a PLT stub,
3639 which is treated separately.
3640 For absolute code, they cannot be handled. */
3641 continue;
3642 else
3643 {
3644 bfd_set_error (bfd_error_bad_value);
3645 goto error_ret_free_internal;
3646 }
3647 st_type = ELF_ST_TYPE (hash->root.type);
3648 sym_name = hash->root.root.root.string;
3649 }
3650
3651 /* Determine what (if any) linker stub is needed. */
3652 stub_type = arm_type_of_stub (info, section, irela, st_type,
3653 hash, destination, sym_sec,
3654 input_bfd, sym_name);
3655 if (stub_type == arm_stub_none)
3656 continue;
3657
3658 /* Support for grouping stub sections. */
3659 id_sec = htab->stub_group[section->id].link_sec;
3660
3661 /* Get the name of this stub. */
3662 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, irela);
3663 if (!stub_name)
3664 goto error_ret_free_internal;
3665
3666 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
3667 stub_name,
3668 FALSE, FALSE);
3669 if (stub_entry != NULL)
3670 {
3671 /* The proper stub has already been created. */
3672 free (stub_name);
3673 continue;
3674 }
3675
3676 stub_entry = elf32_arm_add_stub (stub_name, section, htab);
3677 if (stub_entry == NULL)
3678 {
3679 free (stub_name);
3680 goto error_ret_free_internal;
3681 }
3682
3683 stub_entry->target_value = sym_value;
3684 stub_entry->target_section = sym_sec;
3685 stub_entry->stub_type = stub_type;
3686 stub_entry->h = hash;
3687 stub_entry->st_type = st_type;
3688
3689 if (sym_name == NULL)
3690 sym_name = "unnamed";
3691 stub_entry->output_name
3692 = bfd_alloc (htab->stub_bfd,
3693 sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
3694 + strlen (sym_name));
3695 if (stub_entry->output_name == NULL)
3696 {
3697 free (stub_name);
3698 goto error_ret_free_internal;
3699 }
3700
3701 /* For historical reasons, use the existing names for
3702 ARM-to-Thumb and Thumb-to-ARM stubs. */
3703 if (r_type == (unsigned int) R_ARM_THM_CALL
3704 && st_type != STT_ARM_TFUNC)
3705 sprintf (stub_entry->output_name, THUMB2ARM_GLUE_ENTRY_NAME,
3706 sym_name);
3707 else if (r_type == (unsigned int) R_ARM_CALL
3708 && st_type == STT_ARM_TFUNC)
3709 sprintf (stub_entry->output_name, ARM2THUMB_GLUE_ENTRY_NAME,
3710 sym_name);
3711 else
3712 sprintf (stub_entry->output_name, STUB_ENTRY_NAME,
3713 sym_name);
3714
3715 stub_changed = TRUE;
3716 }
3717
3718 /* We're done with the internal relocs, free them. */
3719 if (elf_section_data (section)->relocs == NULL)
3720 free (internal_relocs);
3721 }
3722 }
3723
3724 if (!stub_changed)
3725 break;
3726
3727 /* OK, we've added some stubs. Find out the new size of the
3728 stub sections. */
3729 for (stub_sec = htab->stub_bfd->sections;
3730 stub_sec != NULL;
3731 stub_sec = stub_sec->next)
3732 stub_sec->size = 0;
3733
3734 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
3735
3736 /* Ask the linker to do its stuff. */
3737 (*htab->layout_sections_again) ();
3738 stub_changed = FALSE;
3739 }
3740
3741 return TRUE;
3742
3743 error_ret_free_local:
3744 return FALSE;
3745 }
3746
3747 /* Build all the stubs associated with the current output file. The
3748 stubs are kept in a hash table attached to the main linker hash
3749 table. We also set up the .plt entries for statically linked PIC
3750 functions here. This function is called via arm_elf_finish in the
3751 linker. */
3752
3753 bfd_boolean
3754 elf32_arm_build_stubs (struct bfd_link_info *info)
3755 {
3756 asection *stub_sec;
3757 struct bfd_hash_table *table;
3758 struct elf32_arm_link_hash_table *htab;
3759
3760 htab = elf32_arm_hash_table (info);
3761
3762 for (stub_sec = htab->stub_bfd->sections;
3763 stub_sec != NULL;
3764 stub_sec = stub_sec->next)
3765 {
3766 bfd_size_type size;
3767
3768 /* Ignore non-stub sections. */
3769 if (!strstr (stub_sec->name, STUB_SUFFIX))
3770 continue;
3771
3772 /* Allocate memory to hold the linker stubs. */
3773 size = stub_sec->size;
3774 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3775 if (stub_sec->contents == NULL && size != 0)
3776 return FALSE;
3777 stub_sec->size = 0;
3778 }
3779
3780 /* Build the stubs as directed by the stub hash table. */
3781 table = &htab->stub_hash_table;
3782 bfd_hash_traverse (table, arm_build_one_stub, info);
3783
3784 return TRUE;
3785 }
3786
3787 /* Locate the Thumb encoded calling stub for NAME. */
3788
3789 static struct elf_link_hash_entry *
3790 find_thumb_glue (struct bfd_link_info *link_info,
3791 const char *name,
3792 char **error_message)
3793 {
3794 char *tmp_name;
3795 struct elf_link_hash_entry *hash;
3796 struct elf32_arm_link_hash_table *hash_table;
3797
3798 /* We need a pointer to the armelf specific hash table. */
3799 hash_table = elf32_arm_hash_table (link_info);
3800
3801 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
3802 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
3803
3804 BFD_ASSERT (tmp_name);
3805
3806 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
3807
3808 hash = elf_link_hash_lookup
3809 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
3810
3811 if (hash == NULL
3812 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
3813 tmp_name, name) == -1)
3814 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
3815
3816 free (tmp_name);
3817
3818 return hash;
3819 }
3820
3821 /* Locate the ARM encoded calling stub for NAME. */
3822
3823 static struct elf_link_hash_entry *
3824 find_arm_glue (struct bfd_link_info *link_info,
3825 const char *name,
3826 char **error_message)
3827 {
3828 char *tmp_name;
3829 struct elf_link_hash_entry *myh;
3830 struct elf32_arm_link_hash_table *hash_table;
3831
3832 /* We need a pointer to the elfarm specific hash table. */
3833 hash_table = elf32_arm_hash_table (link_info);
3834
3835 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
3836 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
3837
3838 BFD_ASSERT (tmp_name);
3839
3840 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
3841
3842 myh = elf_link_hash_lookup
3843 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
3844
3845 if (myh == NULL
3846 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
3847 tmp_name, name) == -1)
3848 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
3849
3850 free (tmp_name);
3851
3852 return myh;
3853 }
3854
3855 /* ARM->Thumb glue (static images):
3856
3857 .arm
3858 __func_from_arm:
3859 ldr r12, __func_addr
3860 bx r12
3861 __func_addr:
3862 .word func @ behave as if you saw a ARM_32 reloc.
3863
3864 (v5t static images)
3865 .arm
3866 __func_from_arm:
3867 ldr pc, __func_addr
3868 __func_addr:
3869 .word func @ behave as if you saw a ARM_32 reloc.
3870
3871 (relocatable images)
3872 .arm
3873 __func_from_arm:
3874 ldr r12, __func_offset
3875 add r12, r12, pc
3876 bx r12
3877 __func_offset:
3878 .word func - . */
3879
3880 #define ARM2THUMB_STATIC_GLUE_SIZE 12
3881 static const insn32 a2t1_ldr_insn = 0xe59fc000;
3882 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
3883 static const insn32 a2t3_func_addr_insn = 0x00000001;
3884
3885 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
3886 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
3887 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
3888
3889 #define ARM2THUMB_PIC_GLUE_SIZE 16
3890 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
3891 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
3892 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
3893
3894 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
3895
3896 .thumb .thumb
3897 .align 2 .align 2
3898 __func_from_thumb: __func_from_thumb:
3899 bx pc push {r6, lr}
3900 nop ldr r6, __func_addr
3901 .arm mov lr, pc
3902 b func bx r6
3903 .arm
3904 ;; back_to_thumb
3905 ldmia r13! {r6, lr}
3906 bx lr
3907 __func_addr:
3908 .word func */
3909
3910 #define THUMB2ARM_GLUE_SIZE 8
3911 static const insn16 t2a1_bx_pc_insn = 0x4778;
3912 static const insn16 t2a2_noop_insn = 0x46c0;
3913 static const insn32 t2a3_b_insn = 0xea000000;
3914
3915 #define VFP11_ERRATUM_VENEER_SIZE 8
3916
3917 #define ARM_BX_VENEER_SIZE 12
3918 static const insn32 armbx1_tst_insn = 0xe3100001;
3919 static const insn32 armbx2_moveq_insn = 0x01a0f000;
3920 static const insn32 armbx3_bx_insn = 0xe12fff10;
3921
3922 #ifndef ELFARM_NABI_C_INCLUDED
3923 static void
3924 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
3925 {
3926 asection * s;
3927 bfd_byte * contents;
3928
3929 if (size == 0)
3930 return;
3931
3932 BFD_ASSERT (abfd != NULL);
3933
3934 s = bfd_get_section_by_name (abfd, name);
3935 BFD_ASSERT (s != NULL);
3936
3937 contents = bfd_alloc (abfd, size);
3938
3939 BFD_ASSERT (s->size == size);
3940 s->contents = contents;
3941 }
3942
3943 bfd_boolean
3944 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
3945 {
3946 struct elf32_arm_link_hash_table * globals;
3947
3948 globals = elf32_arm_hash_table (info);
3949 BFD_ASSERT (globals != NULL);
3950
3951 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3952 globals->arm_glue_size,
3953 ARM2THUMB_GLUE_SECTION_NAME);
3954
3955 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3956 globals->thumb_glue_size,
3957 THUMB2ARM_GLUE_SECTION_NAME);
3958
3959 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3960 globals->vfp11_erratum_glue_size,
3961 VFP11_ERRATUM_VENEER_SECTION_NAME);
3962
3963 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3964 globals->bx_glue_size,
3965 ARM_BX_GLUE_SECTION_NAME);
3966
3967 return TRUE;
3968 }
3969
3970 /* Allocate space and symbols for calling a Thumb function from Arm mode.
3971 returns the symbol identifying the stub. */
3972
3973 static struct elf_link_hash_entry *
3974 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
3975 struct elf_link_hash_entry * h)
3976 {
3977 const char * name = h->root.root.string;
3978 asection * s;
3979 char * tmp_name;
3980 struct elf_link_hash_entry * myh;
3981 struct bfd_link_hash_entry * bh;
3982 struct elf32_arm_link_hash_table * globals;
3983 bfd_vma val;
3984 bfd_size_type size;
3985
3986 globals = elf32_arm_hash_table (link_info);
3987
3988 BFD_ASSERT (globals != NULL);
3989 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3990
3991 s = bfd_get_section_by_name
3992 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
3993
3994 BFD_ASSERT (s != NULL);
3995
3996 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
3997
3998 BFD_ASSERT (tmp_name);
3999
4000 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
4001
4002 myh = elf_link_hash_lookup
4003 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
4004
4005 if (myh != NULL)
4006 {
4007 /* We've already seen this guy. */
4008 free (tmp_name);
4009 return myh;
4010 }
4011
4012 /* The only trick here is using hash_table->arm_glue_size as the value.
4013 Even though the section isn't allocated yet, this is where we will be
4014 putting it. The +1 on the value marks that the stub has not been
4015 output yet - not that it is a Thumb function. */
4016 bh = NULL;
4017 val = globals->arm_glue_size + 1;
4018 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4019 tmp_name, BSF_GLOBAL, s, val,
4020 NULL, TRUE, FALSE, &bh);
4021
4022 myh = (struct elf_link_hash_entry *) bh;
4023 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4024 myh->forced_local = 1;
4025
4026 free (tmp_name);
4027
4028 if (link_info->shared || globals->root.is_relocatable_executable
4029 || globals->pic_veneer)
4030 size = ARM2THUMB_PIC_GLUE_SIZE;
4031 else if (globals->use_blx)
4032 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
4033 else
4034 size = ARM2THUMB_STATIC_GLUE_SIZE;
4035
4036 s->size += size;
4037 globals->arm_glue_size += size;
4038
4039 return myh;
4040 }
4041
4042 static void
4043 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
4044 struct elf_link_hash_entry *h)
4045 {
4046 const char *name = h->root.root.string;
4047 asection *s;
4048 char *tmp_name;
4049 struct elf_link_hash_entry *myh;
4050 struct bfd_link_hash_entry *bh;
4051 struct elf32_arm_link_hash_table *hash_table;
4052 bfd_vma val;
4053
4054 hash_table = elf32_arm_hash_table (link_info);
4055
4056 BFD_ASSERT (hash_table != NULL);
4057 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
4058
4059 s = bfd_get_section_by_name
4060 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
4061
4062 BFD_ASSERT (s != NULL);
4063
4064 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4065 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
4066
4067 BFD_ASSERT (tmp_name);
4068
4069 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
4070
4071 myh = elf_link_hash_lookup
4072 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
4073
4074 if (myh != NULL)
4075 {
4076 /* We've already seen this guy. */
4077 free (tmp_name);
4078 return;
4079 }
4080
4081 /* The only trick here is using hash_table->thumb_glue_size as the value.
4082 Even though the section isn't allocated yet, this is where we will be
4083 putting it. The +1 on the value marks that the stub has not been
4084 output yet - not that it is a Thumb function. */
4085 bh = NULL;
4086 val = hash_table->thumb_glue_size + 1;
4087 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4088 tmp_name, BSF_GLOBAL, s, val,
4089 NULL, TRUE, FALSE, &bh);
4090
4091 /* If we mark it 'Thumb', the disassembler will do a better job. */
4092 myh = (struct elf_link_hash_entry *) bh;
4093 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
4094 myh->forced_local = 1;
4095
4096 free (tmp_name);
4097
4098 #define CHANGE_TO_ARM "__%s_change_to_arm"
4099 #define BACK_FROM_ARM "__%s_back_from_arm"
4100
4101 /* Allocate another symbol to mark where we switch to Arm mode. */
4102 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4103 + strlen (CHANGE_TO_ARM) + 1);
4104
4105 BFD_ASSERT (tmp_name);
4106
4107 sprintf (tmp_name, CHANGE_TO_ARM, name);
4108
4109 bh = NULL;
4110 val = hash_table->thumb_glue_size + 4,
4111 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4112 tmp_name, BSF_LOCAL, s, val,
4113 NULL, TRUE, FALSE, &bh);
4114
4115 free (tmp_name);
4116
4117 s->size += THUMB2ARM_GLUE_SIZE;
4118 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
4119 }
4120
4121
4122 /* Allocate space for ARMv4 BX veneers. */
4123
4124 static void
4125 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
4126 {
4127 asection * s;
4128 struct elf32_arm_link_hash_table *globals;
4129 char *tmp_name;
4130 struct elf_link_hash_entry *myh;
4131 struct bfd_link_hash_entry *bh;
4132 bfd_vma val;
4133
4134 /* BX PC does not need a veneer. */
4135 if (reg == 15)
4136 return;
4137
4138 globals = elf32_arm_hash_table (link_info);
4139
4140 BFD_ASSERT (globals != NULL);
4141 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4142
4143 /* Check if this veneer has already been allocated. */
4144 if (globals->bx_glue_offset[reg])
4145 return;
4146
4147 s = bfd_get_section_by_name
4148 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
4149
4150 BFD_ASSERT (s != NULL);
4151
4152 /* Add symbol for veneer. */
4153 tmp_name = bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
4154
4155 BFD_ASSERT (tmp_name);
4156
4157 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
4158
4159 myh = elf_link_hash_lookup
4160 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
4161
4162 BFD_ASSERT (myh == NULL);
4163
4164 bh = NULL;
4165 val = globals->bx_glue_size;
4166 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4167 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4168 NULL, TRUE, FALSE, &bh);
4169
4170 myh = (struct elf_link_hash_entry *) bh;
4171 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4172 myh->forced_local = 1;
4173
4174 s->size += ARM_BX_VENEER_SIZE;
4175 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
4176 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
4177 }
4178
4179
4180 /* Add an entry to the code/data map for section SEC. */
4181
4182 static void
4183 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
4184 {
4185 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
4186 unsigned int newidx;
4187
4188 if (sec_data->map == NULL)
4189 {
4190 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
4191 sec_data->mapcount = 0;
4192 sec_data->mapsize = 1;
4193 }
4194
4195 newidx = sec_data->mapcount++;
4196
4197 if (sec_data->mapcount > sec_data->mapsize)
4198 {
4199 sec_data->mapsize *= 2;
4200 sec_data->map = bfd_realloc_or_free (sec_data->map, sec_data->mapsize
4201 * sizeof (elf32_arm_section_map));
4202 }
4203
4204 if (sec_data->map)
4205 {
4206 sec_data->map[newidx].vma = vma;
4207 sec_data->map[newidx].type = type;
4208 }
4209 }
4210
4211
4212 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
4213 veneers are handled for now. */
4214
4215 static bfd_vma
4216 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
4217 elf32_vfp11_erratum_list *branch,
4218 bfd *branch_bfd,
4219 asection *branch_sec,
4220 unsigned int offset)
4221 {
4222 asection *s;
4223 struct elf32_arm_link_hash_table *hash_table;
4224 char *tmp_name;
4225 struct elf_link_hash_entry *myh;
4226 struct bfd_link_hash_entry *bh;
4227 bfd_vma val;
4228 struct _arm_elf_section_data *sec_data;
4229 int errcount;
4230 elf32_vfp11_erratum_list *newerr;
4231
4232 hash_table = elf32_arm_hash_table (link_info);
4233
4234 BFD_ASSERT (hash_table != NULL);
4235 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
4236
4237 s = bfd_get_section_by_name
4238 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
4239
4240 sec_data = elf32_arm_section_data (s);
4241
4242 BFD_ASSERT (s != NULL);
4243
4244 tmp_name = bfd_malloc ((bfd_size_type) strlen
4245 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
4246
4247 BFD_ASSERT (tmp_name);
4248
4249 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
4250 hash_table->num_vfp11_fixes);
4251
4252 myh = elf_link_hash_lookup
4253 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4254
4255 BFD_ASSERT (myh == NULL);
4256
4257 bh = NULL;
4258 val = hash_table->vfp11_erratum_glue_size;
4259 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4260 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4261 NULL, TRUE, FALSE, &bh);
4262
4263 myh = (struct elf_link_hash_entry *) bh;
4264 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4265 myh->forced_local = 1;
4266
4267 /* Link veneer back to calling location. */
4268 errcount = ++(sec_data->erratumcount);
4269 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
4270
4271 newerr->type = VFP11_ERRATUM_ARM_VENEER;
4272 newerr->vma = -1;
4273 newerr->u.v.branch = branch;
4274 newerr->u.v.id = hash_table->num_vfp11_fixes;
4275 branch->u.b.veneer = newerr;
4276
4277 newerr->next = sec_data->erratumlist;
4278 sec_data->erratumlist = newerr;
4279
4280 /* A symbol for the return from the veneer. */
4281 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
4282 hash_table->num_vfp11_fixes);
4283
4284 myh = elf_link_hash_lookup
4285 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4286
4287 if (myh != NULL)
4288 abort ();
4289
4290 bh = NULL;
4291 val = offset + 4;
4292 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
4293 branch_sec, val, NULL, TRUE, FALSE, &bh);
4294
4295 myh = (struct elf_link_hash_entry *) bh;
4296 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4297 myh->forced_local = 1;
4298
4299 free (tmp_name);
4300
4301 /* Generate a mapping symbol for the veneer section, and explicitly add an
4302 entry for that symbol to the code/data map for the section. */
4303 if (hash_table->vfp11_erratum_glue_size == 0)
4304 {
4305 bh = NULL;
4306 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
4307 ever requires this erratum fix. */
4308 _bfd_generic_link_add_one_symbol (link_info,
4309 hash_table->bfd_of_glue_owner, "$a",
4310 BSF_LOCAL, s, 0, NULL,
4311 TRUE, FALSE, &bh);
4312
4313 myh = (struct elf_link_hash_entry *) bh;
4314 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
4315 myh->forced_local = 1;
4316
4317 /* The elf32_arm_init_maps function only cares about symbols from input
4318 BFDs. We must make a note of this generated mapping symbol
4319 ourselves so that code byteswapping works properly in
4320 elf32_arm_write_section. */
4321 elf32_arm_section_map_add (s, 'a', 0);
4322 }
4323
4324 s->size += VFP11_ERRATUM_VENEER_SIZE;
4325 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
4326 hash_table->num_vfp11_fixes++;
4327
4328 /* The offset of the veneer. */
4329 return val;
4330 }
4331
4332 /* Note: we do not include the flag SEC_LINKER_CREATED, as that
4333 would prevent elf_link_input_bfd() from processing the contents
4334 of the section. */
4335 #define ARM_GLUE_SECTION_FLAGS \
4336 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY)
4337
4338 /* Create a fake section for use by the ARM backend of the linker. */
4339
4340 static bfd_boolean
4341 arm_make_glue_section (bfd * abfd, const char * name)
4342 {
4343 asection * sec;
4344
4345 sec = bfd_get_section_by_name (abfd, name);
4346 if (sec != NULL)
4347 /* Already made. */
4348 return TRUE;
4349
4350 sec = bfd_make_section_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
4351
4352 if (sec == NULL
4353 || !bfd_set_section_alignment (abfd, sec, 2))
4354 return FALSE;
4355
4356 /* Set the gc mark to prevent the section from being removed by garbage
4357 collection, despite the fact that no relocs refer to this section. */
4358 sec->gc_mark = 1;
4359
4360 return TRUE;
4361 }
4362
4363 /* Add the glue sections to ABFD. This function is called from the
4364 linker scripts in ld/emultempl/{armelf}.em. */
4365
4366 bfd_boolean
4367 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
4368 struct bfd_link_info *info)
4369 {
4370 /* If we are only performing a partial
4371 link do not bother adding the glue. */
4372 if (info->relocatable)
4373 return TRUE;
4374
4375 /* Linker stubs don't need glue. */
4376 if (!strcmp (abfd->filename, "linker stubs"))
4377 return TRUE;
4378
4379 return arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
4380 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
4381 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
4382 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
4383 }
4384
4385 /* Select a BFD to be used to hold the sections used by the glue code.
4386 This function is called from the linker scripts in ld/emultempl/
4387 {armelf/pe}.em. */
4388
4389 bfd_boolean
4390 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
4391 {
4392 struct elf32_arm_link_hash_table *globals;
4393
4394 /* If we are only performing a partial link
4395 do not bother getting a bfd to hold the glue. */
4396 if (info->relocatable)
4397 return TRUE;
4398
4399 /* Make sure we don't attach the glue sections to a dynamic object. */
4400 BFD_ASSERT (!(abfd->flags & DYNAMIC));
4401
4402 globals = elf32_arm_hash_table (info);
4403
4404 BFD_ASSERT (globals != NULL);
4405
4406 if (globals->bfd_of_glue_owner != NULL)
4407 return TRUE;
4408
4409 /* Save the bfd for later use. */
4410 globals->bfd_of_glue_owner = abfd;
4411
4412 return TRUE;
4413 }
4414
4415 static void
4416 check_use_blx (struct elf32_arm_link_hash_table *globals)
4417 {
4418 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4419 Tag_CPU_arch) > 2)
4420 globals->use_blx = 1;
4421 }
4422
4423 bfd_boolean
4424 bfd_elf32_arm_process_before_allocation (bfd *abfd,
4425 struct bfd_link_info *link_info)
4426 {
4427 Elf_Internal_Shdr *symtab_hdr;
4428 Elf_Internal_Rela *internal_relocs = NULL;
4429 Elf_Internal_Rela *irel, *irelend;
4430 bfd_byte *contents = NULL;
4431
4432 asection *sec;
4433 struct elf32_arm_link_hash_table *globals;
4434
4435 /* If we are only performing a partial link do not bother
4436 to construct any glue. */
4437 if (link_info->relocatable)
4438 return TRUE;
4439
4440 /* Here we have a bfd that is to be included on the link. We have a
4441 hook to do reloc rummaging, before section sizes are nailed down. */
4442 globals = elf32_arm_hash_table (link_info);
4443
4444 BFD_ASSERT (globals != NULL);
4445
4446 check_use_blx (globals);
4447
4448 if (globals->byteswap_code && !bfd_big_endian (abfd))
4449 {
4450 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
4451 abfd);
4452 return FALSE;
4453 }
4454
4455 /* PR 5398: If we have not decided to include any loadable sections in
4456 the output then we will not have a glue owner bfd. This is OK, it
4457 just means that there is nothing else for us to do here. */
4458 if (globals->bfd_of_glue_owner == NULL)
4459 return TRUE;
4460
4461 /* Rummage around all the relocs and map the glue vectors. */
4462 sec = abfd->sections;
4463
4464 if (sec == NULL)
4465 return TRUE;
4466
4467 for (; sec != NULL; sec = sec->next)
4468 {
4469 if (sec->reloc_count == 0)
4470 continue;
4471
4472 if ((sec->flags & SEC_EXCLUDE) != 0)
4473 continue;
4474
4475 symtab_hdr = & elf_symtab_hdr (abfd);
4476
4477 /* Load the relocs. */
4478 internal_relocs
4479 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
4480
4481 if (internal_relocs == NULL)
4482 goto error_return;
4483
4484 irelend = internal_relocs + sec->reloc_count;
4485 for (irel = internal_relocs; irel < irelend; irel++)
4486 {
4487 long r_type;
4488 unsigned long r_index;
4489
4490 struct elf_link_hash_entry *h;
4491
4492 r_type = ELF32_R_TYPE (irel->r_info);
4493 r_index = ELF32_R_SYM (irel->r_info);
4494
4495 /* These are the only relocation types we care about. */
4496 if ( r_type != R_ARM_PC24
4497 && r_type != R_ARM_PLT32
4498 && r_type != R_ARM_JUMP24
4499 && r_type != R_ARM_THM_JUMP24
4500 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
4501 continue;
4502
4503 /* Get the section contents if we haven't done so already. */
4504 if (contents == NULL)
4505 {
4506 /* Get cached copy if it exists. */
4507 if (elf_section_data (sec)->this_hdr.contents != NULL)
4508 contents = elf_section_data (sec)->this_hdr.contents;
4509 else
4510 {
4511 /* Go get them off disk. */
4512 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
4513 goto error_return;
4514 }
4515 }
4516
4517 if (r_type == R_ARM_V4BX)
4518 {
4519 int reg;
4520
4521 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
4522 record_arm_bx_glue (link_info, reg);
4523 continue;
4524 }
4525
4526 /* If the relocation is not against a symbol it cannot concern us. */
4527 h = NULL;
4528
4529 /* We don't care about local symbols. */
4530 if (r_index < symtab_hdr->sh_info)
4531 continue;
4532
4533 /* This is an external symbol. */
4534 r_index -= symtab_hdr->sh_info;
4535 h = (struct elf_link_hash_entry *)
4536 elf_sym_hashes (abfd)[r_index];
4537
4538 /* If the relocation is against a static symbol it must be within
4539 the current section and so cannot be a cross ARM/Thumb relocation. */
4540 if (h == NULL)
4541 continue;
4542
4543 /* If the call will go through a PLT entry then we do not need
4544 glue. */
4545 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
4546 continue;
4547
4548 switch (r_type)
4549 {
4550 case R_ARM_PC24:
4551 case R_ARM_PLT32:
4552 case R_ARM_JUMP24:
4553 /* This one is a call from arm code. We need to look up
4554 the target of the call. If it is a thumb target, we
4555 insert glue. */
4556 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
4557 && !(r_type == R_ARM_CALL && globals->use_blx))
4558 record_arm_to_thumb_glue (link_info, h);
4559 break;
4560
4561 case R_ARM_THM_JUMP24:
4562 /* This one is a call from thumb code. We look
4563 up the target of the call. If it is not a thumb
4564 target, we insert glue. */
4565 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC
4566 && !(globals->use_blx && r_type == R_ARM_THM_CALL)
4567 && h->root.type != bfd_link_hash_undefweak)
4568 record_thumb_to_arm_glue (link_info, h);
4569 break;
4570
4571 default:
4572 abort ();
4573 }
4574 }
4575
4576 if (contents != NULL
4577 && elf_section_data (sec)->this_hdr.contents != contents)
4578 free (contents);
4579 contents = NULL;
4580
4581 if (internal_relocs != NULL
4582 && elf_section_data (sec)->relocs != internal_relocs)
4583 free (internal_relocs);
4584 internal_relocs = NULL;
4585 }
4586
4587 return TRUE;
4588
4589 error_return:
4590 if (contents != NULL
4591 && elf_section_data (sec)->this_hdr.contents != contents)
4592 free (contents);
4593 if (internal_relocs != NULL
4594 && elf_section_data (sec)->relocs != internal_relocs)
4595 free (internal_relocs);
4596
4597 return FALSE;
4598 }
4599 #endif
4600
4601
4602 /* Initialise maps of ARM/Thumb/data for input BFDs. */
4603
4604 void
4605 bfd_elf32_arm_init_maps (bfd *abfd)
4606 {
4607 Elf_Internal_Sym *isymbuf;
4608 Elf_Internal_Shdr *hdr;
4609 unsigned int i, localsyms;
4610
4611 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
4612 if (! is_arm_elf (abfd))
4613 return;
4614
4615 if ((abfd->flags & DYNAMIC) != 0)
4616 return;
4617
4618 hdr = & elf_symtab_hdr (abfd);
4619 localsyms = hdr->sh_info;
4620
4621 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4622 should contain the number of local symbols, which should come before any
4623 global symbols. Mapping symbols are always local. */
4624 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
4625 NULL);
4626
4627 /* No internal symbols read? Skip this BFD. */
4628 if (isymbuf == NULL)
4629 return;
4630
4631 for (i = 0; i < localsyms; i++)
4632 {
4633 Elf_Internal_Sym *isym = &isymbuf[i];
4634 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4635 const char *name;
4636
4637 if (sec != NULL
4638 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4639 {
4640 name = bfd_elf_string_from_elf_section (abfd,
4641 hdr->sh_link, isym->st_name);
4642
4643 if (bfd_is_arm_special_symbol_name (name,
4644 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
4645 elf32_arm_section_map_add (sec, name[1], isym->st_value);
4646 }
4647 }
4648 }
4649
4650
4651 void
4652 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
4653 {
4654 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
4655 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
4656
4657 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
4658 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
4659 {
4660 switch (globals->vfp11_fix)
4661 {
4662 case BFD_ARM_VFP11_FIX_DEFAULT:
4663 case BFD_ARM_VFP11_FIX_NONE:
4664 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4665 break;
4666
4667 default:
4668 /* Give a warning, but do as the user requests anyway. */
4669 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
4670 "workaround is not necessary for target architecture"), obfd);
4671 }
4672 }
4673 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
4674 /* For earlier architectures, we might need the workaround, but do not
4675 enable it by default. If users is running with broken hardware, they
4676 must enable the erratum fix explicitly. */
4677 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4678 }
4679
4680
4681 enum bfd_arm_vfp11_pipe
4682 {
4683 VFP11_FMAC,
4684 VFP11_LS,
4685 VFP11_DS,
4686 VFP11_BAD
4687 };
4688
4689 /* Return a VFP register number. This is encoded as RX:X for single-precision
4690 registers, or X:RX for double-precision registers, where RX is the group of
4691 four bits in the instruction encoding and X is the single extension bit.
4692 RX and X fields are specified using their lowest (starting) bit. The return
4693 value is:
4694
4695 0...31: single-precision registers s0...s31
4696 32...63: double-precision registers d0...d31.
4697
4698 Although X should be zero for VFP11 (encoding d0...d15 only), we might
4699 encounter VFP3 instructions, so we allow the full range for DP registers. */
4700
4701 static unsigned int
4702 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
4703 unsigned int x)
4704 {
4705 if (is_double)
4706 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
4707 else
4708 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
4709 }
4710
4711 /* Set bits in *WMASK according to a register number REG as encoded by
4712 bfd_arm_vfp11_regno(). Ignore d16-d31. */
4713
4714 static void
4715 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
4716 {
4717 if (reg < 32)
4718 *wmask |= 1 << reg;
4719 else if (reg < 48)
4720 *wmask |= 3 << ((reg - 32) * 2);
4721 }
4722
4723 /* Return TRUE if WMASK overwrites anything in REGS. */
4724
4725 static bfd_boolean
4726 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
4727 {
4728 int i;
4729
4730 for (i = 0; i < numregs; i++)
4731 {
4732 unsigned int reg = regs[i];
4733
4734 if (reg < 32 && (wmask & (1 << reg)) != 0)
4735 return TRUE;
4736
4737 reg -= 32;
4738
4739 if (reg >= 16)
4740 continue;
4741
4742 if ((wmask & (3 << (reg * 2))) != 0)
4743 return TRUE;
4744 }
4745
4746 return FALSE;
4747 }
4748
4749 /* In this function, we're interested in two things: finding input registers
4750 for VFP data-processing instructions, and finding the set of registers which
4751 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
4752 hold the written set, so FLDM etc. are easy to deal with (we're only
4753 interested in 32 SP registers or 16 dp registers, due to the VFP version
4754 implemented by the chip in question). DP registers are marked by setting
4755 both SP registers in the write mask). */
4756
4757 static enum bfd_arm_vfp11_pipe
4758 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
4759 int *numregs)
4760 {
4761 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
4762 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
4763
4764 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
4765 {
4766 unsigned int pqrs;
4767 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
4768 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
4769
4770 pqrs = ((insn & 0x00800000) >> 20)
4771 | ((insn & 0x00300000) >> 19)
4772 | ((insn & 0x00000040) >> 6);
4773
4774 switch (pqrs)
4775 {
4776 case 0: /* fmac[sd]. */
4777 case 1: /* fnmac[sd]. */
4778 case 2: /* fmsc[sd]. */
4779 case 3: /* fnmsc[sd]. */
4780 pipe = VFP11_FMAC;
4781 bfd_arm_vfp11_write_mask (destmask, fd);
4782 regs[0] = fd;
4783 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4784 regs[2] = fm;
4785 *numregs = 3;
4786 break;
4787
4788 case 4: /* fmul[sd]. */
4789 case 5: /* fnmul[sd]. */
4790 case 6: /* fadd[sd]. */
4791 case 7: /* fsub[sd]. */
4792 pipe = VFP11_FMAC;
4793 goto vfp_binop;
4794
4795 case 8: /* fdiv[sd]. */
4796 pipe = VFP11_DS;
4797 vfp_binop:
4798 bfd_arm_vfp11_write_mask (destmask, fd);
4799 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4800 regs[1] = fm;
4801 *numregs = 2;
4802 break;
4803
4804 case 15: /* extended opcode. */
4805 {
4806 unsigned int extn = ((insn >> 15) & 0x1e)
4807 | ((insn >> 7) & 1);
4808
4809 switch (extn)
4810 {
4811 case 0: /* fcpy[sd]. */
4812 case 1: /* fabs[sd]. */
4813 case 2: /* fneg[sd]. */
4814 case 8: /* fcmp[sd]. */
4815 case 9: /* fcmpe[sd]. */
4816 case 10: /* fcmpz[sd]. */
4817 case 11: /* fcmpez[sd]. */
4818 case 16: /* fuito[sd]. */
4819 case 17: /* fsito[sd]. */
4820 case 24: /* ftoui[sd]. */
4821 case 25: /* ftouiz[sd]. */
4822 case 26: /* ftosi[sd]. */
4823 case 27: /* ftosiz[sd]. */
4824 /* These instructions will not bounce due to underflow. */
4825 *numregs = 0;
4826 pipe = VFP11_FMAC;
4827 break;
4828
4829 case 3: /* fsqrt[sd]. */
4830 /* fsqrt cannot underflow, but it can (perhaps) overwrite
4831 registers to cause the erratum in previous instructions. */
4832 bfd_arm_vfp11_write_mask (destmask, fd);
4833 pipe = VFP11_DS;
4834 break;
4835
4836 case 15: /* fcvt{ds,sd}. */
4837 {
4838 int rnum = 0;
4839
4840 bfd_arm_vfp11_write_mask (destmask, fd);
4841
4842 /* Only FCVTSD can underflow. */
4843 if ((insn & 0x100) != 0)
4844 regs[rnum++] = fm;
4845
4846 *numregs = rnum;
4847
4848 pipe = VFP11_FMAC;
4849 }
4850 break;
4851
4852 default:
4853 return VFP11_BAD;
4854 }
4855 }
4856 break;
4857
4858 default:
4859 return VFP11_BAD;
4860 }
4861 }
4862 /* Two-register transfer. */
4863 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
4864 {
4865 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
4866
4867 if ((insn & 0x100000) == 0)
4868 {
4869 if (is_double)
4870 bfd_arm_vfp11_write_mask (destmask, fm);
4871 else
4872 {
4873 bfd_arm_vfp11_write_mask (destmask, fm);
4874 bfd_arm_vfp11_write_mask (destmask, fm + 1);
4875 }
4876 }
4877
4878 pipe = VFP11_LS;
4879 }
4880 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
4881 {
4882 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
4883 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
4884
4885 switch (puw)
4886 {
4887 case 0: /* Two-reg transfer. We should catch these above. */
4888 abort ();
4889
4890 case 2: /* fldm[sdx]. */
4891 case 3:
4892 case 5:
4893 {
4894 unsigned int i, offset = insn & 0xff;
4895
4896 if (is_double)
4897 offset >>= 1;
4898
4899 for (i = fd; i < fd + offset; i++)
4900 bfd_arm_vfp11_write_mask (destmask, i);
4901 }
4902 break;
4903
4904 case 4: /* fld[sd]. */
4905 case 6:
4906 bfd_arm_vfp11_write_mask (destmask, fd);
4907 break;
4908
4909 default:
4910 return VFP11_BAD;
4911 }
4912
4913 pipe = VFP11_LS;
4914 }
4915 /* Single-register transfer. Note L==0. */
4916 else if ((insn & 0x0f100e10) == 0x0e000a10)
4917 {
4918 unsigned int opcode = (insn >> 21) & 7;
4919 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
4920
4921 switch (opcode)
4922 {
4923 case 0: /* fmsr/fmdlr. */
4924 case 1: /* fmdhr. */
4925 /* Mark fmdhr and fmdlr as writing to the whole of the DP
4926 destination register. I don't know if this is exactly right,
4927 but it is the conservative choice. */
4928 bfd_arm_vfp11_write_mask (destmask, fn);
4929 break;
4930
4931 case 7: /* fmxr. */
4932 break;
4933 }
4934
4935 pipe = VFP11_LS;
4936 }
4937
4938 return pipe;
4939 }
4940
4941
4942 static int elf32_arm_compare_mapping (const void * a, const void * b);
4943
4944
4945 /* Look for potentially-troublesome code sequences which might trigger the
4946 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
4947 (available from ARM) for details of the erratum. A short version is
4948 described in ld.texinfo. */
4949
4950 bfd_boolean
4951 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
4952 {
4953 asection *sec;
4954 bfd_byte *contents = NULL;
4955 int state = 0;
4956 int regs[3], numregs = 0;
4957 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
4958 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
4959
4960 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
4961 The states transition as follows:
4962
4963 0 -> 1 (vector) or 0 -> 2 (scalar)
4964 A VFP FMAC-pipeline instruction has been seen. Fill
4965 regs[0]..regs[numregs-1] with its input operands. Remember this
4966 instruction in 'first_fmac'.
4967
4968 1 -> 2
4969 Any instruction, except for a VFP instruction which overwrites
4970 regs[*].
4971
4972 1 -> 3 [ -> 0 ] or
4973 2 -> 3 [ -> 0 ]
4974 A VFP instruction has been seen which overwrites any of regs[*].
4975 We must make a veneer! Reset state to 0 before examining next
4976 instruction.
4977
4978 2 -> 0
4979 If we fail to match anything in state 2, reset to state 0 and reset
4980 the instruction pointer to the instruction after 'first_fmac'.
4981
4982 If the VFP11 vector mode is in use, there must be at least two unrelated
4983 instructions between anti-dependent VFP11 instructions to properly avoid
4984 triggering the erratum, hence the use of the extra state 1. */
4985
4986 /* If we are only performing a partial link do not bother
4987 to construct any glue. */
4988 if (link_info->relocatable)
4989 return TRUE;
4990
4991 /* Skip if this bfd does not correspond to an ELF image. */
4992 if (! is_arm_elf (abfd))
4993 return TRUE;
4994
4995 /* We should have chosen a fix type by the time we get here. */
4996 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
4997
4998 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
4999 return TRUE;
5000
5001 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5002 {
5003 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
5004 struct _arm_elf_section_data *sec_data;
5005
5006 /* If we don't have executable progbits, we're not interested in this
5007 section. Also skip if section is to be excluded. */
5008 if (elf_section_type (sec) != SHT_PROGBITS
5009 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
5010 || (sec->flags & SEC_EXCLUDE) != 0
5011 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
5012 continue;
5013
5014 sec_data = elf32_arm_section_data (sec);
5015
5016 if (sec_data->mapcount == 0)
5017 continue;
5018
5019 if (elf_section_data (sec)->this_hdr.contents != NULL)
5020 contents = elf_section_data (sec)->this_hdr.contents;
5021 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
5022 goto error_return;
5023
5024 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
5025 elf32_arm_compare_mapping);
5026
5027 for (span = 0; span < sec_data->mapcount; span++)
5028 {
5029 unsigned int span_start = sec_data->map[span].vma;
5030 unsigned int span_end = (span == sec_data->mapcount - 1)
5031 ? sec->size : sec_data->map[span + 1].vma;
5032 char span_type = sec_data->map[span].type;
5033
5034 /* FIXME: Only ARM mode is supported at present. We may need to
5035 support Thumb-2 mode also at some point. */
5036 if (span_type != 'a')
5037 continue;
5038
5039 for (i = span_start; i < span_end;)
5040 {
5041 unsigned int next_i = i + 4;
5042 unsigned int insn = bfd_big_endian (abfd)
5043 ? (contents[i] << 24)
5044 | (contents[i + 1] << 16)
5045 | (contents[i + 2] << 8)
5046 | contents[i + 3]
5047 : (contents[i + 3] << 24)
5048 | (contents[i + 2] << 16)
5049 | (contents[i + 1] << 8)
5050 | contents[i];
5051 unsigned int writemask = 0;
5052 enum bfd_arm_vfp11_pipe pipe;
5053
5054 switch (state)
5055 {
5056 case 0:
5057 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
5058 &numregs);
5059 /* I'm assuming the VFP11 erratum can trigger with denorm
5060 operands on either the FMAC or the DS pipeline. This might
5061 lead to slightly overenthusiastic veneer insertion. */
5062 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
5063 {
5064 state = use_vector ? 1 : 2;
5065 first_fmac = i;
5066 veneer_of_insn = insn;
5067 }
5068 break;
5069
5070 case 1:
5071 {
5072 int other_regs[3], other_numregs;
5073 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5074 other_regs,
5075 &other_numregs);
5076 if (pipe != VFP11_BAD
5077 && bfd_arm_vfp11_antidependency (writemask, regs,
5078 numregs))
5079 state = 3;
5080 else
5081 state = 2;
5082 }
5083 break;
5084
5085 case 2:
5086 {
5087 int other_regs[3], other_numregs;
5088 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5089 other_regs,
5090 &other_numregs);
5091 if (pipe != VFP11_BAD
5092 && bfd_arm_vfp11_antidependency (writemask, regs,
5093 numregs))
5094 state = 3;
5095 else
5096 {
5097 state = 0;
5098 next_i = first_fmac + 4;
5099 }
5100 }
5101 break;
5102
5103 case 3:
5104 abort (); /* Should be unreachable. */
5105 }
5106
5107 if (state == 3)
5108 {
5109 elf32_vfp11_erratum_list *newerr
5110 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
5111 int errcount;
5112
5113 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
5114
5115 newerr->u.b.vfp_insn = veneer_of_insn;
5116
5117 switch (span_type)
5118 {
5119 case 'a':
5120 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
5121 break;
5122
5123 default:
5124 abort ();
5125 }
5126
5127 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
5128 first_fmac);
5129
5130 newerr->vma = -1;
5131
5132 newerr->next = sec_data->erratumlist;
5133 sec_data->erratumlist = newerr;
5134
5135 state = 0;
5136 }
5137
5138 i = next_i;
5139 }
5140 }
5141
5142 if (contents != NULL
5143 && elf_section_data (sec)->this_hdr.contents != contents)
5144 free (contents);
5145 contents = NULL;
5146 }
5147
5148 return TRUE;
5149
5150 error_return:
5151 if (contents != NULL
5152 && elf_section_data (sec)->this_hdr.contents != contents)
5153 free (contents);
5154
5155 return FALSE;
5156 }
5157
5158 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
5159 after sections have been laid out, using specially-named symbols. */
5160
5161 void
5162 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
5163 struct bfd_link_info *link_info)
5164 {
5165 asection *sec;
5166 struct elf32_arm_link_hash_table *globals;
5167 char *tmp_name;
5168
5169 if (link_info->relocatable)
5170 return;
5171
5172 /* Skip if this bfd does not correspond to an ELF image. */
5173 if (! is_arm_elf (abfd))
5174 return;
5175
5176 globals = elf32_arm_hash_table (link_info);
5177
5178 tmp_name = bfd_malloc ((bfd_size_type) strlen
5179 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
5180
5181 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5182 {
5183 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
5184 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
5185
5186 for (; errnode != NULL; errnode = errnode->next)
5187 {
5188 struct elf_link_hash_entry *myh;
5189 bfd_vma vma;
5190
5191 switch (errnode->type)
5192 {
5193 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
5194 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
5195 /* Find veneer symbol. */
5196 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
5197 errnode->u.b.veneer->u.v.id);
5198
5199 myh = elf_link_hash_lookup
5200 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5201
5202 if (myh == NULL)
5203 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5204 "`%s'"), abfd, tmp_name);
5205
5206 vma = myh->root.u.def.section->output_section->vma
5207 + myh->root.u.def.section->output_offset
5208 + myh->root.u.def.value;
5209
5210 errnode->u.b.veneer->vma = vma;
5211 break;
5212
5213 case VFP11_ERRATUM_ARM_VENEER:
5214 case VFP11_ERRATUM_THUMB_VENEER:
5215 /* Find return location. */
5216 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
5217 errnode->u.v.id);
5218
5219 myh = elf_link_hash_lookup
5220 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5221
5222 if (myh == NULL)
5223 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5224 "`%s'"), abfd, tmp_name);
5225
5226 vma = myh->root.u.def.section->output_section->vma
5227 + myh->root.u.def.section->output_offset
5228 + myh->root.u.def.value;
5229
5230 errnode->u.v.branch->vma = vma;
5231 break;
5232
5233 default:
5234 abort ();
5235 }
5236 }
5237 }
5238
5239 free (tmp_name);
5240 }
5241
5242
5243 /* Set target relocation values needed during linking. */
5244
5245 void
5246 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
5247 struct bfd_link_info *link_info,
5248 int target1_is_rel,
5249 char * target2_type,
5250 int fix_v4bx,
5251 int use_blx,
5252 bfd_arm_vfp11_fix vfp11_fix,
5253 int no_enum_warn, int no_wchar_warn,
5254 int pic_veneer)
5255 {
5256 struct elf32_arm_link_hash_table *globals;
5257
5258 globals = elf32_arm_hash_table (link_info);
5259
5260 globals->target1_is_rel = target1_is_rel;
5261 if (strcmp (target2_type, "rel") == 0)
5262 globals->target2_reloc = R_ARM_REL32;
5263 else if (strcmp (target2_type, "abs") == 0)
5264 globals->target2_reloc = R_ARM_ABS32;
5265 else if (strcmp (target2_type, "got-rel") == 0)
5266 globals->target2_reloc = R_ARM_GOT_PREL;
5267 else
5268 {
5269 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
5270 target2_type);
5271 }
5272 globals->fix_v4bx = fix_v4bx;
5273 globals->use_blx |= use_blx;
5274 globals->vfp11_fix = vfp11_fix;
5275 globals->pic_veneer = pic_veneer;
5276
5277 BFD_ASSERT (is_arm_elf (output_bfd));
5278 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
5279 elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
5280 }
5281
5282 /* Replace the target offset of a Thumb bl or b.w instruction. */
5283
5284 static void
5285 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
5286 {
5287 bfd_vma upper;
5288 bfd_vma lower;
5289 int reloc_sign;
5290
5291 BFD_ASSERT ((offset & 1) == 0);
5292
5293 upper = bfd_get_16 (abfd, insn);
5294 lower = bfd_get_16 (abfd, insn + 2);
5295 reloc_sign = (offset < 0) ? 1 : 0;
5296 upper = (upper & ~(bfd_vma) 0x7ff)
5297 | ((offset >> 12) & 0x3ff)
5298 | (reloc_sign << 10);
5299 lower = (lower & ~(bfd_vma) 0x2fff)
5300 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
5301 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
5302 | ((offset >> 1) & 0x7ff);
5303 bfd_put_16 (abfd, upper, insn);
5304 bfd_put_16 (abfd, lower, insn + 2);
5305 }
5306
5307 /* Thumb code calling an ARM function. */
5308
5309 static int
5310 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
5311 const char * name,
5312 bfd * input_bfd,
5313 bfd * output_bfd,
5314 asection * input_section,
5315 bfd_byte * hit_data,
5316 asection * sym_sec,
5317 bfd_vma offset,
5318 bfd_signed_vma addend,
5319 bfd_vma val,
5320 char **error_message)
5321 {
5322 asection * s = 0;
5323 bfd_vma my_offset;
5324 long int ret_offset;
5325 struct elf_link_hash_entry * myh;
5326 struct elf32_arm_link_hash_table * globals;
5327
5328 myh = find_thumb_glue (info, name, error_message);
5329 if (myh == NULL)
5330 return FALSE;
5331
5332 globals = elf32_arm_hash_table (info);
5333
5334 BFD_ASSERT (globals != NULL);
5335 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5336
5337 my_offset = myh->root.u.def.value;
5338
5339 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5340 THUMB2ARM_GLUE_SECTION_NAME);
5341
5342 BFD_ASSERT (s != NULL);
5343 BFD_ASSERT (s->contents != NULL);
5344 BFD_ASSERT (s->output_section != NULL);
5345
5346 if ((my_offset & 0x01) == 0x01)
5347 {
5348 if (sym_sec != NULL
5349 && sym_sec->owner != NULL
5350 && !INTERWORK_FLAG (sym_sec->owner))
5351 {
5352 (*_bfd_error_handler)
5353 (_("%B(%s): warning: interworking not enabled.\n"
5354 " first occurrence: %B: thumb call to arm"),
5355 sym_sec->owner, input_bfd, name);
5356
5357 return FALSE;
5358 }
5359
5360 --my_offset;
5361 myh->root.u.def.value = my_offset;
5362
5363 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
5364 s->contents + my_offset);
5365
5366 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
5367 s->contents + my_offset + 2);
5368
5369 ret_offset =
5370 /* Address of destination of the stub. */
5371 ((bfd_signed_vma) val)
5372 - ((bfd_signed_vma)
5373 /* Offset from the start of the current section
5374 to the start of the stubs. */
5375 (s->output_offset
5376 /* Offset of the start of this stub from the start of the stubs. */
5377 + my_offset
5378 /* Address of the start of the current section. */
5379 + s->output_section->vma)
5380 /* The branch instruction is 4 bytes into the stub. */
5381 + 4
5382 /* ARM branches work from the pc of the instruction + 8. */
5383 + 8);
5384
5385 put_arm_insn (globals, output_bfd,
5386 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
5387 s->contents + my_offset + 4);
5388 }
5389
5390 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
5391
5392 /* Now go back and fix up the original BL insn to point to here. */
5393 ret_offset =
5394 /* Address of where the stub is located. */
5395 (s->output_section->vma + s->output_offset + my_offset)
5396 /* Address of where the BL is located. */
5397 - (input_section->output_section->vma + input_section->output_offset
5398 + offset)
5399 /* Addend in the relocation. */
5400 - addend
5401 /* Biassing for PC-relative addressing. */
5402 - 8;
5403
5404 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
5405
5406 return TRUE;
5407 }
5408
5409 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
5410
5411 static struct elf_link_hash_entry *
5412 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
5413 const char * name,
5414 bfd * input_bfd,
5415 bfd * output_bfd,
5416 asection * sym_sec,
5417 bfd_vma val,
5418 asection * s,
5419 char ** error_message)
5420 {
5421 bfd_vma my_offset;
5422 long int ret_offset;
5423 struct elf_link_hash_entry * myh;
5424 struct elf32_arm_link_hash_table * globals;
5425
5426 myh = find_arm_glue (info, name, error_message);
5427 if (myh == NULL)
5428 return NULL;
5429
5430 globals = elf32_arm_hash_table (info);
5431
5432 BFD_ASSERT (globals != NULL);
5433 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5434
5435 my_offset = myh->root.u.def.value;
5436
5437 if ((my_offset & 0x01) == 0x01)
5438 {
5439 if (sym_sec != NULL
5440 && sym_sec->owner != NULL
5441 && !INTERWORK_FLAG (sym_sec->owner))
5442 {
5443 (*_bfd_error_handler)
5444 (_("%B(%s): warning: interworking not enabled.\n"
5445 " first occurrence: %B: arm call to thumb"),
5446 sym_sec->owner, input_bfd, name);
5447 }
5448
5449 --my_offset;
5450 myh->root.u.def.value = my_offset;
5451
5452 if (info->shared || globals->root.is_relocatable_executable
5453 || globals->pic_veneer)
5454 {
5455 /* For relocatable objects we can't use absolute addresses,
5456 so construct the address from a relative offset. */
5457 /* TODO: If the offset is small it's probably worth
5458 constructing the address with adds. */
5459 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
5460 s->contents + my_offset);
5461 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
5462 s->contents + my_offset + 4);
5463 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
5464 s->contents + my_offset + 8);
5465 /* Adjust the offset by 4 for the position of the add,
5466 and 8 for the pipeline offset. */
5467 ret_offset = (val - (s->output_offset
5468 + s->output_section->vma
5469 + my_offset + 12))
5470 | 1;
5471 bfd_put_32 (output_bfd, ret_offset,
5472 s->contents + my_offset + 12);
5473 }
5474 else if (globals->use_blx)
5475 {
5476 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
5477 s->contents + my_offset);
5478
5479 /* It's a thumb address. Add the low order bit. */
5480 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
5481 s->contents + my_offset + 4);
5482 }
5483 else
5484 {
5485 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
5486 s->contents + my_offset);
5487
5488 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
5489 s->contents + my_offset + 4);
5490
5491 /* It's a thumb address. Add the low order bit. */
5492 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
5493 s->contents + my_offset + 8);
5494
5495 my_offset += 12;
5496 }
5497 }
5498
5499 BFD_ASSERT (my_offset <= globals->arm_glue_size);
5500
5501 return myh;
5502 }
5503
5504 /* Arm code calling a Thumb function. */
5505
5506 static int
5507 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
5508 const char * name,
5509 bfd * input_bfd,
5510 bfd * output_bfd,
5511 asection * input_section,
5512 bfd_byte * hit_data,
5513 asection * sym_sec,
5514 bfd_vma offset,
5515 bfd_signed_vma addend,
5516 bfd_vma val,
5517 char **error_message)
5518 {
5519 unsigned long int tmp;
5520 bfd_vma my_offset;
5521 asection * s;
5522 long int ret_offset;
5523 struct elf_link_hash_entry * myh;
5524 struct elf32_arm_link_hash_table * globals;
5525
5526 globals = elf32_arm_hash_table (info);
5527
5528 BFD_ASSERT (globals != NULL);
5529 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5530
5531 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5532 ARM2THUMB_GLUE_SECTION_NAME);
5533 BFD_ASSERT (s != NULL);
5534 BFD_ASSERT (s->contents != NULL);
5535 BFD_ASSERT (s->output_section != NULL);
5536
5537 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
5538 sym_sec, val, s, error_message);
5539 if (!myh)
5540 return FALSE;
5541
5542 my_offset = myh->root.u.def.value;
5543 tmp = bfd_get_32 (input_bfd, hit_data);
5544 tmp = tmp & 0xFF000000;
5545
5546 /* Somehow these are both 4 too far, so subtract 8. */
5547 ret_offset = (s->output_offset
5548 + my_offset
5549 + s->output_section->vma
5550 - (input_section->output_offset
5551 + input_section->output_section->vma
5552 + offset + addend)
5553 - 8);
5554
5555 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
5556
5557 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
5558
5559 return TRUE;
5560 }
5561
5562 /* Populate Arm stub for an exported Thumb function. */
5563
5564 static bfd_boolean
5565 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
5566 {
5567 struct bfd_link_info * info = (struct bfd_link_info *) inf;
5568 asection * s;
5569 struct elf_link_hash_entry * myh;
5570 struct elf32_arm_link_hash_entry *eh;
5571 struct elf32_arm_link_hash_table * globals;
5572 asection *sec;
5573 bfd_vma val;
5574 char *error_message;
5575
5576 eh = elf32_arm_hash_entry (h);
5577 /* Allocate stubs for exported Thumb functions on v4t. */
5578 if (eh->export_glue == NULL)
5579 return TRUE;
5580
5581 globals = elf32_arm_hash_table (info);
5582
5583 BFD_ASSERT (globals != NULL);
5584 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5585
5586 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5587 ARM2THUMB_GLUE_SECTION_NAME);
5588 BFD_ASSERT (s != NULL);
5589 BFD_ASSERT (s->contents != NULL);
5590 BFD_ASSERT (s->output_section != NULL);
5591
5592 sec = eh->export_glue->root.u.def.section;
5593
5594 BFD_ASSERT (sec->output_section != NULL);
5595
5596 val = eh->export_glue->root.u.def.value + sec->output_offset
5597 + sec->output_section->vma;
5598
5599 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
5600 h->root.u.def.section->owner,
5601 globals->obfd, sec, val, s,
5602 &error_message);
5603 BFD_ASSERT (myh);
5604 return TRUE;
5605 }
5606
5607 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
5608
5609 static bfd_vma
5610 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
5611 {
5612 bfd_byte *p;
5613 bfd_vma glue_addr;
5614 asection *s;
5615 struct elf32_arm_link_hash_table *globals;
5616
5617 globals = elf32_arm_hash_table (info);
5618
5619 BFD_ASSERT (globals != NULL);
5620 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5621
5622 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5623 ARM_BX_GLUE_SECTION_NAME);
5624 BFD_ASSERT (s != NULL);
5625 BFD_ASSERT (s->contents != NULL);
5626 BFD_ASSERT (s->output_section != NULL);
5627
5628 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
5629
5630 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
5631
5632 if ((globals->bx_glue_offset[reg] & 1) == 0)
5633 {
5634 p = s->contents + glue_addr;
5635 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
5636 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
5637 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
5638 globals->bx_glue_offset[reg] |= 1;
5639 }
5640
5641 return glue_addr + s->output_section->vma + s->output_offset;
5642 }
5643
5644 /* Generate Arm stubs for exported Thumb symbols. */
5645 static void
5646 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
5647 struct bfd_link_info *link_info)
5648 {
5649 struct elf32_arm_link_hash_table * globals;
5650
5651 if (link_info == NULL)
5652 /* Ignore this if we are not called by the ELF backend linker. */
5653 return;
5654
5655 globals = elf32_arm_hash_table (link_info);
5656 /* If blx is available then exported Thumb symbols are OK and there is
5657 nothing to do. */
5658 if (globals->use_blx)
5659 return;
5660
5661 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
5662 link_info);
5663 }
5664
5665 /* Some relocations map to different relocations depending on the
5666 target. Return the real relocation. */
5667
5668 static int
5669 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
5670 int r_type)
5671 {
5672 switch (r_type)
5673 {
5674 case R_ARM_TARGET1:
5675 if (globals->target1_is_rel)
5676 return R_ARM_REL32;
5677 else
5678 return R_ARM_ABS32;
5679
5680 case R_ARM_TARGET2:
5681 return globals->target2_reloc;
5682
5683 default:
5684 return r_type;
5685 }
5686 }
5687
5688 /* Return the base VMA address which should be subtracted from real addresses
5689 when resolving @dtpoff relocation.
5690 This is PT_TLS segment p_vaddr. */
5691
5692 static bfd_vma
5693 dtpoff_base (struct bfd_link_info *info)
5694 {
5695 /* If tls_sec is NULL, we should have signalled an error already. */
5696 if (elf_hash_table (info)->tls_sec == NULL)
5697 return 0;
5698 return elf_hash_table (info)->tls_sec->vma;
5699 }
5700
5701 /* Return the relocation value for @tpoff relocation
5702 if STT_TLS virtual address is ADDRESS. */
5703
5704 static bfd_vma
5705 tpoff (struct bfd_link_info *info, bfd_vma address)
5706 {
5707 struct elf_link_hash_table *htab = elf_hash_table (info);
5708 bfd_vma base;
5709
5710 /* If tls_sec is NULL, we should have signalled an error already. */
5711 if (htab->tls_sec == NULL)
5712 return 0;
5713 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
5714 return address - htab->tls_sec->vma + base;
5715 }
5716
5717 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
5718 VALUE is the relocation value. */
5719
5720 static bfd_reloc_status_type
5721 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
5722 {
5723 if (value > 0xfff)
5724 return bfd_reloc_overflow;
5725
5726 value |= bfd_get_32 (abfd, data) & 0xfffff000;
5727 bfd_put_32 (abfd, value, data);
5728 return bfd_reloc_ok;
5729 }
5730
5731 /* For a given value of n, calculate the value of G_n as required to
5732 deal with group relocations. We return it in the form of an
5733 encoded constant-and-rotation, together with the final residual. If n is
5734 specified as less than zero, then final_residual is filled with the
5735 input value and no further action is performed. */
5736
5737 static bfd_vma
5738 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
5739 {
5740 int current_n;
5741 bfd_vma g_n;
5742 bfd_vma encoded_g_n = 0;
5743 bfd_vma residual = value; /* Also known as Y_n. */
5744
5745 for (current_n = 0; current_n <= n; current_n++)
5746 {
5747 int shift;
5748
5749 /* Calculate which part of the value to mask. */
5750 if (residual == 0)
5751 shift = 0;
5752 else
5753 {
5754 int msb;
5755
5756 /* Determine the most significant bit in the residual and
5757 align the resulting value to a 2-bit boundary. */
5758 for (msb = 30; msb >= 0; msb -= 2)
5759 if (residual & (3 << msb))
5760 break;
5761
5762 /* The desired shift is now (msb - 6), or zero, whichever
5763 is the greater. */
5764 shift = msb - 6;
5765 if (shift < 0)
5766 shift = 0;
5767 }
5768
5769 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
5770 g_n = residual & (0xff << shift);
5771 encoded_g_n = (g_n >> shift)
5772 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
5773
5774 /* Calculate the residual for the next time around. */
5775 residual &= ~g_n;
5776 }
5777
5778 *final_residual = residual;
5779
5780 return encoded_g_n;
5781 }
5782
5783 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
5784 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
5785
5786 static int
5787 identify_add_or_sub (bfd_vma insn)
5788 {
5789 int opcode = insn & 0x1e00000;
5790
5791 if (opcode == 1 << 23) /* ADD */
5792 return 1;
5793
5794 if (opcode == 1 << 22) /* SUB */
5795 return -1;
5796
5797 return 0;
5798 }
5799
5800 /* Perform a relocation as part of a final link. */
5801
5802 static bfd_reloc_status_type
5803 elf32_arm_final_link_relocate (reloc_howto_type * howto,
5804 bfd * input_bfd,
5805 bfd * output_bfd,
5806 asection * input_section,
5807 bfd_byte * contents,
5808 Elf_Internal_Rela * rel,
5809 bfd_vma value,
5810 struct bfd_link_info * info,
5811 asection * sym_sec,
5812 const char * sym_name,
5813 int sym_flags,
5814 struct elf_link_hash_entry * h,
5815 bfd_boolean * unresolved_reloc_p,
5816 char ** error_message)
5817 {
5818 unsigned long r_type = howto->type;
5819 unsigned long r_symndx;
5820 bfd_byte * hit_data = contents + rel->r_offset;
5821 bfd * dynobj = NULL;
5822 Elf_Internal_Shdr * symtab_hdr;
5823 struct elf_link_hash_entry ** sym_hashes;
5824 bfd_vma * local_got_offsets;
5825 asection * sgot = NULL;
5826 asection * splt = NULL;
5827 asection * sreloc = NULL;
5828 bfd_vma addend;
5829 bfd_signed_vma signed_addend;
5830 struct elf32_arm_link_hash_table * globals;
5831
5832 globals = elf32_arm_hash_table (info);
5833
5834 BFD_ASSERT (is_arm_elf (input_bfd));
5835
5836 /* Some relocation types map to different relocations depending on the
5837 target. We pick the right one here. */
5838 r_type = arm_real_reloc_type (globals, r_type);
5839 if (r_type != howto->type)
5840 howto = elf32_arm_howto_from_type (r_type);
5841
5842 /* If the start address has been set, then set the EF_ARM_HASENTRY
5843 flag. Setting this more than once is redundant, but the cost is
5844 not too high, and it keeps the code simple.
5845
5846 The test is done here, rather than somewhere else, because the
5847 start address is only set just before the final link commences.
5848
5849 Note - if the user deliberately sets a start address of 0, the
5850 flag will not be set. */
5851 if (bfd_get_start_address (output_bfd) != 0)
5852 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
5853
5854 dynobj = elf_hash_table (info)->dynobj;
5855 if (dynobj)
5856 {
5857 sgot = bfd_get_section_by_name (dynobj, ".got");
5858 splt = bfd_get_section_by_name (dynobj, ".plt");
5859 }
5860 symtab_hdr = & elf_symtab_hdr (input_bfd);
5861 sym_hashes = elf_sym_hashes (input_bfd);
5862 local_got_offsets = elf_local_got_offsets (input_bfd);
5863 r_symndx = ELF32_R_SYM (rel->r_info);
5864
5865 if (globals->use_rel)
5866 {
5867 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
5868
5869 if (addend & ((howto->src_mask + 1) >> 1))
5870 {
5871 signed_addend = -1;
5872 signed_addend &= ~ howto->src_mask;
5873 signed_addend |= addend;
5874 }
5875 else
5876 signed_addend = addend;
5877 }
5878 else
5879 addend = signed_addend = rel->r_addend;
5880
5881 switch (r_type)
5882 {
5883 case R_ARM_NONE:
5884 /* We don't need to find a value for this symbol. It's just a
5885 marker. */
5886 *unresolved_reloc_p = FALSE;
5887 return bfd_reloc_ok;
5888
5889 case R_ARM_ABS12:
5890 if (!globals->vxworks_p)
5891 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
5892
5893 case R_ARM_PC24:
5894 case R_ARM_ABS32:
5895 case R_ARM_ABS32_NOI:
5896 case R_ARM_REL32:
5897 case R_ARM_REL32_NOI:
5898 case R_ARM_CALL:
5899 case R_ARM_JUMP24:
5900 case R_ARM_XPC25:
5901 case R_ARM_PREL31:
5902 case R_ARM_PLT32:
5903 /* Handle relocations which should use the PLT entry. ABS32/REL32
5904 will use the symbol's value, which may point to a PLT entry, but we
5905 don't need to handle that here. If we created a PLT entry, all
5906 branches in this object should go to it. */
5907 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
5908 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
5909 && h != NULL
5910 && splt != NULL
5911 && h->plt.offset != (bfd_vma) -1)
5912 {
5913 /* If we've created a .plt section, and assigned a PLT entry to
5914 this function, it should not be known to bind locally. If
5915 it were, we would have cleared the PLT entry. */
5916 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
5917
5918 value = (splt->output_section->vma
5919 + splt->output_offset
5920 + h->plt.offset);
5921 *unresolved_reloc_p = FALSE;
5922 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5923 contents, rel->r_offset, value,
5924 rel->r_addend);
5925 }
5926
5927 /* When generating a shared object or relocatable executable, these
5928 relocations are copied into the output file to be resolved at
5929 run time. */
5930 if ((info->shared || globals->root.is_relocatable_executable)
5931 && (input_section->flags & SEC_ALLOC)
5932 && !(elf32_arm_hash_table (info)->vxworks_p
5933 && strcmp (input_section->output_section->name,
5934 ".tls_vars") == 0)
5935 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
5936 || !SYMBOL_CALLS_LOCAL (info, h))
5937 && (h == NULL
5938 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5939 || h->root.type != bfd_link_hash_undefweak)
5940 && r_type != R_ARM_PC24
5941 && r_type != R_ARM_CALL
5942 && r_type != R_ARM_JUMP24
5943 && r_type != R_ARM_PREL31
5944 && r_type != R_ARM_PLT32)
5945 {
5946 Elf_Internal_Rela outrel;
5947 bfd_byte *loc;
5948 bfd_boolean skip, relocate;
5949
5950 *unresolved_reloc_p = FALSE;
5951
5952 if (sreloc == NULL)
5953 {
5954 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
5955 ! globals->use_rel);
5956
5957 if (sreloc == NULL)
5958 return bfd_reloc_notsupported;
5959 }
5960
5961 skip = FALSE;
5962 relocate = FALSE;
5963
5964 outrel.r_addend = addend;
5965 outrel.r_offset =
5966 _bfd_elf_section_offset (output_bfd, info, input_section,
5967 rel->r_offset);
5968 if (outrel.r_offset == (bfd_vma) -1)
5969 skip = TRUE;
5970 else if (outrel.r_offset == (bfd_vma) -2)
5971 skip = TRUE, relocate = TRUE;
5972 outrel.r_offset += (input_section->output_section->vma
5973 + input_section->output_offset);
5974
5975 if (skip)
5976 memset (&outrel, 0, sizeof outrel);
5977 else if (h != NULL
5978 && h->dynindx != -1
5979 && (!info->shared
5980 || !info->symbolic
5981 || !h->def_regular))
5982 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5983 else
5984 {
5985 int symbol;
5986
5987 /* This symbol is local, or marked to become local. */
5988 if (sym_flags == STT_ARM_TFUNC)
5989 value |= 1;
5990 if (globals->symbian_p)
5991 {
5992 asection *osec;
5993
5994 /* On Symbian OS, the data segment and text segement
5995 can be relocated independently. Therefore, we
5996 must indicate the segment to which this
5997 relocation is relative. The BPABI allows us to
5998 use any symbol in the right segment; we just use
5999 the section symbol as it is convenient. (We
6000 cannot use the symbol given by "h" directly as it
6001 will not appear in the dynamic symbol table.)
6002
6003 Note that the dynamic linker ignores the section
6004 symbol value, so we don't subtract osec->vma
6005 from the emitted reloc addend. */
6006 if (sym_sec)
6007 osec = sym_sec->output_section;
6008 else
6009 osec = input_section->output_section;
6010 symbol = elf_section_data (osec)->dynindx;
6011 if (symbol == 0)
6012 {
6013 struct elf_link_hash_table *htab = elf_hash_table (info);
6014
6015 if ((osec->flags & SEC_READONLY) == 0
6016 && htab->data_index_section != NULL)
6017 osec = htab->data_index_section;
6018 else
6019 osec = htab->text_index_section;
6020 symbol = elf_section_data (osec)->dynindx;
6021 }
6022 BFD_ASSERT (symbol != 0);
6023 }
6024 else
6025 /* On SVR4-ish systems, the dynamic loader cannot
6026 relocate the text and data segments independently,
6027 so the symbol does not matter. */
6028 symbol = 0;
6029 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
6030 if (globals->use_rel)
6031 relocate = TRUE;
6032 else
6033 outrel.r_addend += value;
6034 }
6035
6036 loc = sreloc->contents;
6037 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
6038 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6039
6040 /* If this reloc is against an external symbol, we do not want to
6041 fiddle with the addend. Otherwise, we need to include the symbol
6042 value so that it becomes an addend for the dynamic reloc. */
6043 if (! relocate)
6044 return bfd_reloc_ok;
6045
6046 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6047 contents, rel->r_offset, value,
6048 (bfd_vma) 0);
6049 }
6050 else switch (r_type)
6051 {
6052 case R_ARM_ABS12:
6053 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
6054
6055 case R_ARM_XPC25: /* Arm BLX instruction. */
6056 case R_ARM_CALL:
6057 case R_ARM_JUMP24:
6058 case R_ARM_PC24: /* Arm B/BL instruction. */
6059 case R_ARM_PLT32:
6060 {
6061 bfd_vma from;
6062 bfd_signed_vma branch_offset;
6063 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6064
6065 from = (input_section->output_section->vma
6066 + input_section->output_offset
6067 + rel->r_offset);
6068 branch_offset = (bfd_signed_vma)(value - from);
6069
6070 if (r_type == R_ARM_XPC25)
6071 {
6072 /* Check for Arm calling Arm function. */
6073 /* FIXME: Should we translate the instruction into a BL
6074 instruction instead ? */
6075 if (sym_flags != STT_ARM_TFUNC)
6076 (*_bfd_error_handler)
6077 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
6078 input_bfd,
6079 h ? h->root.root.string : "(local)");
6080 }
6081 else if (r_type != R_ARM_CALL)
6082 {
6083 /* Check for Arm calling Thumb function. */
6084 if (sym_flags == STT_ARM_TFUNC)
6085 {
6086 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
6087 output_bfd, input_section,
6088 hit_data, sym_sec, rel->r_offset,
6089 signed_addend, value,
6090 error_message))
6091 return bfd_reloc_ok;
6092 else
6093 return bfd_reloc_dangerous;
6094 }
6095 }
6096
6097 /* Check if a stub has to be inserted because the
6098 destination is too far or we are changing mode. */
6099 if (r_type == R_ARM_CALL)
6100 {
6101 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
6102 || branch_offset < ARM_MAX_BWD_BRANCH_OFFSET
6103 || sym_flags == STT_ARM_TFUNC)
6104 {
6105 /* The target is out of reach, so redirect the
6106 branch to the local stub for this function. */
6107
6108 stub_entry = elf32_arm_get_stub_entry (input_section,
6109 sym_sec, h,
6110 rel, globals);
6111 if (stub_entry != NULL)
6112 value = (stub_entry->stub_offset
6113 + stub_entry->stub_sec->output_offset
6114 + stub_entry->stub_sec->output_section->vma);
6115 }
6116 }
6117
6118 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
6119 where:
6120 S is the address of the symbol in the relocation.
6121 P is address of the instruction being relocated.
6122 A is the addend (extracted from the instruction) in bytes.
6123
6124 S is held in 'value'.
6125 P is the base address of the section containing the
6126 instruction plus the offset of the reloc into that
6127 section, ie:
6128 (input_section->output_section->vma +
6129 input_section->output_offset +
6130 rel->r_offset).
6131 A is the addend, converted into bytes, ie:
6132 (signed_addend * 4)
6133
6134 Note: None of these operations have knowledge of the pipeline
6135 size of the processor, thus it is up to the assembler to
6136 encode this information into the addend. */
6137 value -= (input_section->output_section->vma
6138 + input_section->output_offset);
6139 value -= rel->r_offset;
6140 if (globals->use_rel)
6141 value += (signed_addend << howto->size);
6142 else
6143 /* RELA addends do not have to be adjusted by howto->size. */
6144 value += signed_addend;
6145
6146 signed_addend = value;
6147 signed_addend >>= howto->rightshift;
6148
6149 /* A branch to an undefined weak symbol is turned into a jump to
6150 the next instruction. */
6151 if (h && h->root.type == bfd_link_hash_undefweak)
6152 {
6153 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000)
6154 | 0x0affffff;
6155 }
6156 else
6157 {
6158 /* Perform a signed range check. */
6159 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
6160 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
6161 return bfd_reloc_overflow;
6162
6163 addend = (value & 2);
6164
6165 value = (signed_addend & howto->dst_mask)
6166 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
6167
6168 /* Set the H bit in the BLX instruction. */
6169 if (sym_flags == STT_ARM_TFUNC)
6170 {
6171 if (addend)
6172 value |= (1 << 24);
6173 else
6174 value &= ~(bfd_vma)(1 << 24);
6175 }
6176 if (r_type == R_ARM_CALL)
6177 {
6178 /* Select the correct instruction (BL or BLX). */
6179 /* Only if we are not handling a BL to a stub. In this
6180 case, mode switching is performed by the stub. */
6181 if (sym_flags == STT_ARM_TFUNC && !stub_entry)
6182 value |= (1 << 28);
6183 else
6184 {
6185 value &= ~(bfd_vma)(1 << 28);
6186 value |= (1 << 24);
6187 }
6188 }
6189 }
6190 }
6191 break;
6192
6193 case R_ARM_ABS32:
6194 value += addend;
6195 if (sym_flags == STT_ARM_TFUNC)
6196 value |= 1;
6197 break;
6198
6199 case R_ARM_ABS32_NOI:
6200 value += addend;
6201 break;
6202
6203 case R_ARM_REL32:
6204 value += addend;
6205 if (sym_flags == STT_ARM_TFUNC)
6206 value |= 1;
6207 value -= (input_section->output_section->vma
6208 + input_section->output_offset + rel->r_offset);
6209 break;
6210
6211 case R_ARM_REL32_NOI:
6212 value += addend;
6213 value -= (input_section->output_section->vma
6214 + input_section->output_offset + rel->r_offset);
6215 break;
6216
6217 case R_ARM_PREL31:
6218 value -= (input_section->output_section->vma
6219 + input_section->output_offset + rel->r_offset);
6220 value += signed_addend;
6221 if (! h || h->root.type != bfd_link_hash_undefweak)
6222 {
6223 /* Check for overflow. */
6224 if ((value ^ (value >> 1)) & (1 << 30))
6225 return bfd_reloc_overflow;
6226 }
6227 value &= 0x7fffffff;
6228 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
6229 if (sym_flags == STT_ARM_TFUNC)
6230 value |= 1;
6231 break;
6232 }
6233
6234 bfd_put_32 (input_bfd, value, hit_data);
6235 return bfd_reloc_ok;
6236
6237 case R_ARM_ABS8:
6238 value += addend;
6239 if ((long) value > 0x7f || (long) value < -0x80)
6240 return bfd_reloc_overflow;
6241
6242 bfd_put_8 (input_bfd, value, hit_data);
6243 return bfd_reloc_ok;
6244
6245 case R_ARM_ABS16:
6246 value += addend;
6247
6248 if ((long) value > 0x7fff || (long) value < -0x8000)
6249 return bfd_reloc_overflow;
6250
6251 bfd_put_16 (input_bfd, value, hit_data);
6252 return bfd_reloc_ok;
6253
6254 case R_ARM_THM_ABS5:
6255 /* Support ldr and str instructions for the thumb. */
6256 if (globals->use_rel)
6257 {
6258 /* Need to refetch addend. */
6259 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6260 /* ??? Need to determine shift amount from operand size. */
6261 addend >>= howto->rightshift;
6262 }
6263 value += addend;
6264
6265 /* ??? Isn't value unsigned? */
6266 if ((long) value > 0x1f || (long) value < -0x10)
6267 return bfd_reloc_overflow;
6268
6269 /* ??? Value needs to be properly shifted into place first. */
6270 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
6271 bfd_put_16 (input_bfd, value, hit_data);
6272 return bfd_reloc_ok;
6273
6274 case R_ARM_THM_ALU_PREL_11_0:
6275 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
6276 {
6277 bfd_vma insn;
6278 bfd_signed_vma relocation;
6279
6280 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6281 | bfd_get_16 (input_bfd, hit_data + 2);
6282
6283 if (globals->use_rel)
6284 {
6285 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
6286 | ((insn & (1 << 26)) >> 15);
6287 if (insn & 0xf00000)
6288 signed_addend = -signed_addend;
6289 }
6290
6291 relocation = value + signed_addend;
6292 relocation -= (input_section->output_section->vma
6293 + input_section->output_offset
6294 + rel->r_offset);
6295
6296 value = abs (relocation);
6297
6298 if (value >= 0x1000)
6299 return bfd_reloc_overflow;
6300
6301 insn = (insn & 0xfb0f8f00) | (value & 0xff)
6302 | ((value & 0x700) << 4)
6303 | ((value & 0x800) << 15);
6304 if (relocation < 0)
6305 insn |= 0xa00000;
6306
6307 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6308 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6309
6310 return bfd_reloc_ok;
6311 }
6312
6313 case R_ARM_THM_PC12:
6314 /* Corresponds to: ldr.w reg, [pc, #offset]. */
6315 {
6316 bfd_vma insn;
6317 bfd_signed_vma relocation;
6318
6319 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6320 | bfd_get_16 (input_bfd, hit_data + 2);
6321
6322 if (globals->use_rel)
6323 {
6324 signed_addend = insn & 0xfff;
6325 if (!(insn & (1 << 23)))
6326 signed_addend = -signed_addend;
6327 }
6328
6329 relocation = value + signed_addend;
6330 relocation -= (input_section->output_section->vma
6331 + input_section->output_offset
6332 + rel->r_offset);
6333
6334 value = abs (relocation);
6335
6336 if (value >= 0x1000)
6337 return bfd_reloc_overflow;
6338
6339 insn = (insn & 0xff7ff000) | value;
6340 if (relocation >= 0)
6341 insn |= (1 << 23);
6342
6343 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6344 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6345
6346 return bfd_reloc_ok;
6347 }
6348
6349 case R_ARM_THM_XPC22:
6350 case R_ARM_THM_CALL:
6351 case R_ARM_THM_JUMP24:
6352 /* Thumb BL (branch long instruction). */
6353 {
6354 bfd_vma relocation;
6355 bfd_vma reloc_sign;
6356 bfd_boolean overflow = FALSE;
6357 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6358 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6359 bfd_signed_vma reloc_signed_max;
6360 bfd_signed_vma reloc_signed_min;
6361 bfd_vma check;
6362 bfd_signed_vma signed_check;
6363 int bitsize;
6364 int thumb2 = using_thumb2 (globals);
6365
6366 /* A branch to an undefined weak symbol is turned into a jump to
6367 the next instruction unless a PLT entry will be created. */
6368 if (h && h->root.type == bfd_link_hash_undefweak
6369 && !(splt != NULL && h->plt.offset != (bfd_vma) -1))
6370 {
6371 bfd_put_16 (input_bfd, 0xe000, hit_data);
6372 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
6373 return bfd_reloc_ok;
6374 }
6375
6376 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
6377 with Thumb-1) involving the J1 and J2 bits. */
6378 if (globals->use_rel)
6379 {
6380 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
6381 bfd_vma upper = upper_insn & 0x3ff;
6382 bfd_vma lower = lower_insn & 0x7ff;
6383 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
6384 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
6385 bfd_vma i1 = j1 ^ s ? 0 : 1;
6386 bfd_vma i2 = j2 ^ s ? 0 : 1;
6387
6388 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
6389 /* Sign extend. */
6390 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
6391
6392 signed_addend = addend;
6393 }
6394
6395 if (r_type == R_ARM_THM_XPC22)
6396 {
6397 /* Check for Thumb to Thumb call. */
6398 /* FIXME: Should we translate the instruction into a BL
6399 instruction instead ? */
6400 if (sym_flags == STT_ARM_TFUNC)
6401 (*_bfd_error_handler)
6402 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
6403 input_bfd,
6404 h ? h->root.root.string : "(local)");
6405 }
6406 else
6407 {
6408 /* If it is not a call to Thumb, assume call to Arm.
6409 If it is a call relative to a section name, then it is not a
6410 function call at all, but rather a long jump. Calls through
6411 the PLT do not require stubs. */
6412 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
6413 && (h == NULL || splt == NULL
6414 || h->plt.offset == (bfd_vma) -1))
6415 {
6416 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6417 {
6418 /* Convert BL to BLX. */
6419 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6420 }
6421 else if (r_type != R_ARM_THM_CALL)
6422 {
6423 if (elf32_thumb_to_arm_stub
6424 (info, sym_name, input_bfd, output_bfd, input_section,
6425 hit_data, sym_sec, rel->r_offset, signed_addend, value,
6426 error_message))
6427 return bfd_reloc_ok;
6428 else
6429 return bfd_reloc_dangerous;
6430 }
6431 }
6432 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
6433 && r_type == R_ARM_THM_CALL)
6434 {
6435 /* Make sure this is a BL. */
6436 lower_insn |= 0x1800;
6437 }
6438 }
6439
6440 /* Handle calls via the PLT. */
6441 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6442 {
6443 value = (splt->output_section->vma
6444 + splt->output_offset
6445 + h->plt.offset);
6446 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6447 {
6448 /* If the Thumb BLX instruction is available, convert the
6449 BL to a BLX instruction to call the ARM-mode PLT entry. */
6450 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6451 }
6452 else
6453 /* Target the Thumb stub before the ARM PLT entry. */
6454 value -= PLT_THUMB_STUB_SIZE;
6455 *unresolved_reloc_p = FALSE;
6456 }
6457
6458 if (r_type == R_ARM_THM_CALL)
6459 {
6460 /* Check if a stub has to be inserted because the destination
6461 is too far. */
6462 bfd_vma from;
6463 bfd_signed_vma branch_offset;
6464 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6465
6466 from = (input_section->output_section->vma
6467 + input_section->output_offset
6468 + rel->r_offset);
6469 branch_offset = (bfd_signed_vma)(value - from);
6470
6471 if ((!thumb2
6472 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
6473 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
6474 ||
6475 (thumb2
6476 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
6477 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
6478 || ((sym_flags != STT_ARM_TFUNC) && !globals->use_blx))
6479 {
6480 /* The target is out of reach or we are changing modes, so
6481 redirect the branch to the local stub for this
6482 function. */
6483 stub_entry = elf32_arm_get_stub_entry (input_section,
6484 sym_sec, h,
6485 rel, globals);
6486 if (stub_entry != NULL)
6487 value = (stub_entry->stub_offset
6488 + stub_entry->stub_sec->output_offset
6489 + stub_entry->stub_sec->output_section->vma);
6490
6491 /* If this call becomes a call to Arm, force BLX. */
6492 if (globals->use_blx)
6493 {
6494 if ((stub_entry
6495 && !arm_stub_is_thumb (stub_entry->stub_type))
6496 || (sym_flags != STT_ARM_TFUNC))
6497 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6498 }
6499 }
6500 }
6501
6502 relocation = value + signed_addend;
6503
6504 relocation -= (input_section->output_section->vma
6505 + input_section->output_offset
6506 + rel->r_offset);
6507
6508 check = relocation >> howto->rightshift;
6509
6510 /* If this is a signed value, the rightshift just dropped
6511 leading 1 bits (assuming twos complement). */
6512 if ((bfd_signed_vma) relocation >= 0)
6513 signed_check = check;
6514 else
6515 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
6516
6517 /* Calculate the permissable maximum and minimum values for
6518 this relocation according to whether we're relocating for
6519 Thumb-2 or not. */
6520 bitsize = howto->bitsize;
6521 if (!thumb2)
6522 bitsize -= 2;
6523 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
6524 reloc_signed_min = ~reloc_signed_max;
6525
6526 /* Assumes two's complement. */
6527 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6528 overflow = TRUE;
6529
6530 if ((lower_insn & 0x5000) == 0x4000)
6531 /* For a BLX instruction, make sure that the relocation is rounded up
6532 to a word boundary. This follows the semantics of the instruction
6533 which specifies that bit 1 of the target address will come from bit
6534 1 of the base address. */
6535 relocation = (relocation + 2) & ~ 3;
6536
6537 /* Put RELOCATION back into the insn. Assumes two's complement.
6538 We use the Thumb-2 encoding, which is safe even if dealing with
6539 a Thumb-1 instruction by virtue of our overflow check above. */
6540 reloc_sign = (signed_check < 0) ? 1 : 0;
6541 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
6542 | ((relocation >> 12) & 0x3ff)
6543 | (reloc_sign << 10);
6544 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
6545 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
6546 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
6547 | ((relocation >> 1) & 0x7ff);
6548
6549 /* Put the relocated value back in the object file: */
6550 bfd_put_16 (input_bfd, upper_insn, hit_data);
6551 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6552
6553 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6554 }
6555 break;
6556
6557 case R_ARM_THM_JUMP19:
6558 /* Thumb32 conditional branch instruction. */
6559 {
6560 bfd_vma relocation;
6561 bfd_boolean overflow = FALSE;
6562 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6563 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6564 bfd_signed_vma reloc_signed_max = 0xffffe;
6565 bfd_signed_vma reloc_signed_min = -0x100000;
6566 bfd_signed_vma signed_check;
6567
6568 /* Need to refetch the addend, reconstruct the top three bits,
6569 and squish the two 11 bit pieces together. */
6570 if (globals->use_rel)
6571 {
6572 bfd_vma S = (upper_insn & 0x0400) >> 10;
6573 bfd_vma upper = (upper_insn & 0x003f);
6574 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
6575 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
6576 bfd_vma lower = (lower_insn & 0x07ff);
6577
6578 upper |= J1 << 6;
6579 upper |= J2 << 7;
6580 upper |= (!S) << 8;
6581 upper -= 0x0100; /* Sign extend. */
6582
6583 addend = (upper << 12) | (lower << 1);
6584 signed_addend = addend;
6585 }
6586
6587 /* Handle calls via the PLT. */
6588 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6589 {
6590 value = (splt->output_section->vma
6591 + splt->output_offset
6592 + h->plt.offset);
6593 /* Target the Thumb stub before the ARM PLT entry. */
6594 value -= PLT_THUMB_STUB_SIZE;
6595 *unresolved_reloc_p = FALSE;
6596 }
6597
6598 /* ??? Should handle interworking? GCC might someday try to
6599 use this for tail calls. */
6600
6601 relocation = value + signed_addend;
6602 relocation -= (input_section->output_section->vma
6603 + input_section->output_offset
6604 + rel->r_offset);
6605 signed_check = (bfd_signed_vma) relocation;
6606
6607 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6608 overflow = TRUE;
6609
6610 /* Put RELOCATION back into the insn. */
6611 {
6612 bfd_vma S = (relocation & 0x00100000) >> 20;
6613 bfd_vma J2 = (relocation & 0x00080000) >> 19;
6614 bfd_vma J1 = (relocation & 0x00040000) >> 18;
6615 bfd_vma hi = (relocation & 0x0003f000) >> 12;
6616 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
6617
6618 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
6619 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
6620 }
6621
6622 /* Put the relocated value back in the object file: */
6623 bfd_put_16 (input_bfd, upper_insn, hit_data);
6624 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6625
6626 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6627 }
6628
6629 case R_ARM_THM_JUMP11:
6630 case R_ARM_THM_JUMP8:
6631 case R_ARM_THM_JUMP6:
6632 /* Thumb B (branch) instruction). */
6633 {
6634 bfd_signed_vma relocation;
6635 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
6636 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
6637 bfd_signed_vma signed_check;
6638
6639 /* CZB cannot jump backward. */
6640 if (r_type == R_ARM_THM_JUMP6)
6641 reloc_signed_min = 0;
6642
6643 if (globals->use_rel)
6644 {
6645 /* Need to refetch addend. */
6646 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6647 if (addend & ((howto->src_mask + 1) >> 1))
6648 {
6649 signed_addend = -1;
6650 signed_addend &= ~ howto->src_mask;
6651 signed_addend |= addend;
6652 }
6653 else
6654 signed_addend = addend;
6655 /* The value in the insn has been right shifted. We need to
6656 undo this, so that we can perform the address calculation
6657 in terms of bytes. */
6658 signed_addend <<= howto->rightshift;
6659 }
6660 relocation = value + signed_addend;
6661
6662 relocation -= (input_section->output_section->vma
6663 + input_section->output_offset
6664 + rel->r_offset);
6665
6666 relocation >>= howto->rightshift;
6667 signed_check = relocation;
6668
6669 if (r_type == R_ARM_THM_JUMP6)
6670 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
6671 else
6672 relocation &= howto->dst_mask;
6673 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
6674
6675 bfd_put_16 (input_bfd, relocation, hit_data);
6676
6677 /* Assumes two's complement. */
6678 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6679 return bfd_reloc_overflow;
6680
6681 return bfd_reloc_ok;
6682 }
6683
6684 case R_ARM_ALU_PCREL7_0:
6685 case R_ARM_ALU_PCREL15_8:
6686 case R_ARM_ALU_PCREL23_15:
6687 {
6688 bfd_vma insn;
6689 bfd_vma relocation;
6690
6691 insn = bfd_get_32 (input_bfd, hit_data);
6692 if (globals->use_rel)
6693 {
6694 /* Extract the addend. */
6695 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
6696 signed_addend = addend;
6697 }
6698 relocation = value + signed_addend;
6699
6700 relocation -= (input_section->output_section->vma
6701 + input_section->output_offset
6702 + rel->r_offset);
6703 insn = (insn & ~0xfff)
6704 | ((howto->bitpos << 7) & 0xf00)
6705 | ((relocation >> howto->bitpos) & 0xff);
6706 bfd_put_32 (input_bfd, value, hit_data);
6707 }
6708 return bfd_reloc_ok;
6709
6710 case R_ARM_GNU_VTINHERIT:
6711 case R_ARM_GNU_VTENTRY:
6712 return bfd_reloc_ok;
6713
6714 case R_ARM_GOTOFF32:
6715 /* Relocation is relative to the start of the
6716 global offset table. */
6717
6718 BFD_ASSERT (sgot != NULL);
6719 if (sgot == NULL)
6720 return bfd_reloc_notsupported;
6721
6722 /* If we are addressing a Thumb function, we need to adjust the
6723 address by one, so that attempts to call the function pointer will
6724 correctly interpret it as Thumb code. */
6725 if (sym_flags == STT_ARM_TFUNC)
6726 value += 1;
6727
6728 /* Note that sgot->output_offset is not involved in this
6729 calculation. We always want the start of .got. If we
6730 define _GLOBAL_OFFSET_TABLE in a different way, as is
6731 permitted by the ABI, we might have to change this
6732 calculation. */
6733 value -= sgot->output_section->vma;
6734 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6735 contents, rel->r_offset, value,
6736 rel->r_addend);
6737
6738 case R_ARM_GOTPC:
6739 /* Use global offset table as symbol value. */
6740 BFD_ASSERT (sgot != NULL);
6741
6742 if (sgot == NULL)
6743 return bfd_reloc_notsupported;
6744
6745 *unresolved_reloc_p = FALSE;
6746 value = sgot->output_section->vma;
6747 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6748 contents, rel->r_offset, value,
6749 rel->r_addend);
6750
6751 case R_ARM_GOT32:
6752 case R_ARM_GOT_PREL:
6753 /* Relocation is to the entry for this symbol in the
6754 global offset table. */
6755 if (sgot == NULL)
6756 return bfd_reloc_notsupported;
6757
6758 if (h != NULL)
6759 {
6760 bfd_vma off;
6761 bfd_boolean dyn;
6762
6763 off = h->got.offset;
6764 BFD_ASSERT (off != (bfd_vma) -1);
6765 dyn = globals->root.dynamic_sections_created;
6766
6767 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6768 || (info->shared
6769 && SYMBOL_REFERENCES_LOCAL (info, h))
6770 || (ELF_ST_VISIBILITY (h->other)
6771 && h->root.type == bfd_link_hash_undefweak))
6772 {
6773 /* This is actually a static link, or it is a -Bsymbolic link
6774 and the symbol is defined locally. We must initialize this
6775 entry in the global offset table. Since the offset must
6776 always be a multiple of 4, we use the least significant bit
6777 to record whether we have initialized it already.
6778
6779 When doing a dynamic link, we create a .rel(a).got relocation
6780 entry to initialize the value. This is done in the
6781 finish_dynamic_symbol routine. */
6782 if ((off & 1) != 0)
6783 off &= ~1;
6784 else
6785 {
6786 /* If we are addressing a Thumb function, we need to
6787 adjust the address by one, so that attempts to
6788 call the function pointer will correctly
6789 interpret it as Thumb code. */
6790 if (sym_flags == STT_ARM_TFUNC)
6791 value |= 1;
6792
6793 bfd_put_32 (output_bfd, value, sgot->contents + off);
6794 h->got.offset |= 1;
6795 }
6796 }
6797 else
6798 *unresolved_reloc_p = FALSE;
6799
6800 value = sgot->output_offset + off;
6801 }
6802 else
6803 {
6804 bfd_vma off;
6805
6806 BFD_ASSERT (local_got_offsets != NULL &&
6807 local_got_offsets[r_symndx] != (bfd_vma) -1);
6808
6809 off = local_got_offsets[r_symndx];
6810
6811 /* The offset must always be a multiple of 4. We use the
6812 least significant bit to record whether we have already
6813 generated the necessary reloc. */
6814 if ((off & 1) != 0)
6815 off &= ~1;
6816 else
6817 {
6818 /* If we are addressing a Thumb function, we need to
6819 adjust the address by one, so that attempts to
6820 call the function pointer will correctly
6821 interpret it as Thumb code. */
6822 if (sym_flags == STT_ARM_TFUNC)
6823 value |= 1;
6824
6825 if (globals->use_rel)
6826 bfd_put_32 (output_bfd, value, sgot->contents + off);
6827
6828 if (info->shared)
6829 {
6830 asection * srelgot;
6831 Elf_Internal_Rela outrel;
6832 bfd_byte *loc;
6833
6834 srelgot = (bfd_get_section_by_name
6835 (dynobj, RELOC_SECTION (globals, ".got")));
6836 BFD_ASSERT (srelgot != NULL);
6837
6838 outrel.r_addend = addend + value;
6839 outrel.r_offset = (sgot->output_section->vma
6840 + sgot->output_offset
6841 + off);
6842 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
6843 loc = srelgot->contents;
6844 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
6845 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6846 }
6847
6848 local_got_offsets[r_symndx] |= 1;
6849 }
6850
6851 value = sgot->output_offset + off;
6852 }
6853 if (r_type != R_ARM_GOT32)
6854 value += sgot->output_section->vma;
6855
6856 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6857 contents, rel->r_offset, value,
6858 rel->r_addend);
6859
6860 case R_ARM_TLS_LDO32:
6861 value = value - dtpoff_base (info);
6862
6863 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6864 contents, rel->r_offset, value,
6865 rel->r_addend);
6866
6867 case R_ARM_TLS_LDM32:
6868 {
6869 bfd_vma off;
6870
6871 if (globals->sgot == NULL)
6872 abort ();
6873
6874 off = globals->tls_ldm_got.offset;
6875
6876 if ((off & 1) != 0)
6877 off &= ~1;
6878 else
6879 {
6880 /* If we don't know the module number, create a relocation
6881 for it. */
6882 if (info->shared)
6883 {
6884 Elf_Internal_Rela outrel;
6885 bfd_byte *loc;
6886
6887 if (globals->srelgot == NULL)
6888 abort ();
6889
6890 outrel.r_addend = 0;
6891 outrel.r_offset = (globals->sgot->output_section->vma
6892 + globals->sgot->output_offset + off);
6893 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
6894
6895 if (globals->use_rel)
6896 bfd_put_32 (output_bfd, outrel.r_addend,
6897 globals->sgot->contents + off);
6898
6899 loc = globals->srelgot->contents;
6900 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
6901 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6902 }
6903 else
6904 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
6905
6906 globals->tls_ldm_got.offset |= 1;
6907 }
6908
6909 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
6910 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
6911
6912 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6913 contents, rel->r_offset, value,
6914 rel->r_addend);
6915 }
6916
6917 case R_ARM_TLS_GD32:
6918 case R_ARM_TLS_IE32:
6919 {
6920 bfd_vma off;
6921 int indx;
6922 char tls_type;
6923
6924 if (globals->sgot == NULL)
6925 abort ();
6926
6927 indx = 0;
6928 if (h != NULL)
6929 {
6930 bfd_boolean dyn;
6931 dyn = globals->root.dynamic_sections_created;
6932 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6933 && (!info->shared
6934 || !SYMBOL_REFERENCES_LOCAL (info, h)))
6935 {
6936 *unresolved_reloc_p = FALSE;
6937 indx = h->dynindx;
6938 }
6939 off = h->got.offset;
6940 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
6941 }
6942 else
6943 {
6944 if (local_got_offsets == NULL)
6945 abort ();
6946 off = local_got_offsets[r_symndx];
6947 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
6948 }
6949
6950 if (tls_type == GOT_UNKNOWN)
6951 abort ();
6952
6953 if ((off & 1) != 0)
6954 off &= ~1;
6955 else
6956 {
6957 bfd_boolean need_relocs = FALSE;
6958 Elf_Internal_Rela outrel;
6959 bfd_byte *loc = NULL;
6960 int cur_off = off;
6961
6962 /* The GOT entries have not been initialized yet. Do it
6963 now, and emit any relocations. If both an IE GOT and a
6964 GD GOT are necessary, we emit the GD first. */
6965
6966 if ((info->shared || indx != 0)
6967 && (h == NULL
6968 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6969 || h->root.type != bfd_link_hash_undefweak))
6970 {
6971 need_relocs = TRUE;
6972 if (globals->srelgot == NULL)
6973 abort ();
6974 loc = globals->srelgot->contents;
6975 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
6976 }
6977
6978 if (tls_type & GOT_TLS_GD)
6979 {
6980 if (need_relocs)
6981 {
6982 outrel.r_addend = 0;
6983 outrel.r_offset = (globals->sgot->output_section->vma
6984 + globals->sgot->output_offset
6985 + cur_off);
6986 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
6987
6988 if (globals->use_rel)
6989 bfd_put_32 (output_bfd, outrel.r_addend,
6990 globals->sgot->contents + cur_off);
6991
6992 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6993 globals->srelgot->reloc_count++;
6994 loc += RELOC_SIZE (globals);
6995
6996 if (indx == 0)
6997 bfd_put_32 (output_bfd, value - dtpoff_base (info),
6998 globals->sgot->contents + cur_off + 4);
6999 else
7000 {
7001 outrel.r_addend = 0;
7002 outrel.r_info = ELF32_R_INFO (indx,
7003 R_ARM_TLS_DTPOFF32);
7004 outrel.r_offset += 4;
7005
7006 if (globals->use_rel)
7007 bfd_put_32 (output_bfd, outrel.r_addend,
7008 globals->sgot->contents + cur_off + 4);
7009
7010
7011 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7012 globals->srelgot->reloc_count++;
7013 loc += RELOC_SIZE (globals);
7014 }
7015 }
7016 else
7017 {
7018 /* If we are not emitting relocations for a
7019 general dynamic reference, then we must be in a
7020 static link or an executable link with the
7021 symbol binding locally. Mark it as belonging
7022 to module 1, the executable. */
7023 bfd_put_32 (output_bfd, 1,
7024 globals->sgot->contents + cur_off);
7025 bfd_put_32 (output_bfd, value - dtpoff_base (info),
7026 globals->sgot->contents + cur_off + 4);
7027 }
7028
7029 cur_off += 8;
7030 }
7031
7032 if (tls_type & GOT_TLS_IE)
7033 {
7034 if (need_relocs)
7035 {
7036 if (indx == 0)
7037 outrel.r_addend = value - dtpoff_base (info);
7038 else
7039 outrel.r_addend = 0;
7040 outrel.r_offset = (globals->sgot->output_section->vma
7041 + globals->sgot->output_offset
7042 + cur_off);
7043 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
7044
7045 if (globals->use_rel)
7046 bfd_put_32 (output_bfd, outrel.r_addend,
7047 globals->sgot->contents + cur_off);
7048
7049 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7050 globals->srelgot->reloc_count++;
7051 loc += RELOC_SIZE (globals);
7052 }
7053 else
7054 bfd_put_32 (output_bfd, tpoff (info, value),
7055 globals->sgot->contents + cur_off);
7056 cur_off += 4;
7057 }
7058
7059 if (h != NULL)
7060 h->got.offset |= 1;
7061 else
7062 local_got_offsets[r_symndx] |= 1;
7063 }
7064
7065 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
7066 off += 8;
7067 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
7068 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
7069
7070 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7071 contents, rel->r_offset, value,
7072 rel->r_addend);
7073 }
7074
7075 case R_ARM_TLS_LE32:
7076 if (info->shared)
7077 {
7078 (*_bfd_error_handler)
7079 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
7080 input_bfd, input_section,
7081 (long) rel->r_offset, howto->name);
7082 return FALSE;
7083 }
7084 else
7085 value = tpoff (info, value);
7086
7087 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7088 contents, rel->r_offset, value,
7089 rel->r_addend);
7090
7091 case R_ARM_V4BX:
7092 if (globals->fix_v4bx)
7093 {
7094 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7095
7096 /* Ensure that we have a BX instruction. */
7097 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
7098
7099 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
7100 {
7101 /* Branch to veneer. */
7102 bfd_vma glue_addr;
7103 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
7104 glue_addr -= input_section->output_section->vma
7105 + input_section->output_offset
7106 + rel->r_offset + 8;
7107 insn = (insn & 0xf0000000) | 0x0a000000
7108 | ((glue_addr >> 2) & 0x00ffffff);
7109 }
7110 else
7111 {
7112 /* Preserve Rm (lowest four bits) and the condition code
7113 (highest four bits). Other bits encode MOV PC,Rm. */
7114 insn = (insn & 0xf000000f) | 0x01a0f000;
7115 }
7116
7117 bfd_put_32 (input_bfd, insn, hit_data);
7118 }
7119 return bfd_reloc_ok;
7120
7121 case R_ARM_MOVW_ABS_NC:
7122 case R_ARM_MOVT_ABS:
7123 case R_ARM_MOVW_PREL_NC:
7124 case R_ARM_MOVT_PREL:
7125 /* Until we properly support segment-base-relative addressing then
7126 we assume the segment base to be zero, as for the group relocations.
7127 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
7128 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
7129 case R_ARM_MOVW_BREL_NC:
7130 case R_ARM_MOVW_BREL:
7131 case R_ARM_MOVT_BREL:
7132 {
7133 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7134
7135 if (globals->use_rel)
7136 {
7137 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
7138 signed_addend = (addend ^ 0x8000) - 0x8000;
7139 }
7140
7141 value += signed_addend;
7142
7143 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
7144 value -= (input_section->output_section->vma
7145 + input_section->output_offset + rel->r_offset);
7146
7147 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
7148 return bfd_reloc_overflow;
7149
7150 if (sym_flags == STT_ARM_TFUNC)
7151 value |= 1;
7152
7153 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
7154 || r_type == R_ARM_MOVT_BREL)
7155 value >>= 16;
7156
7157 insn &= 0xfff0f000;
7158 insn |= value & 0xfff;
7159 insn |= (value & 0xf000) << 4;
7160 bfd_put_32 (input_bfd, insn, hit_data);
7161 }
7162 return bfd_reloc_ok;
7163
7164 case R_ARM_THM_MOVW_ABS_NC:
7165 case R_ARM_THM_MOVT_ABS:
7166 case R_ARM_THM_MOVW_PREL_NC:
7167 case R_ARM_THM_MOVT_PREL:
7168 /* Until we properly support segment-base-relative addressing then
7169 we assume the segment base to be zero, as for the above relocations.
7170 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
7171 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
7172 as R_ARM_THM_MOVT_ABS. */
7173 case R_ARM_THM_MOVW_BREL_NC:
7174 case R_ARM_THM_MOVW_BREL:
7175 case R_ARM_THM_MOVT_BREL:
7176 {
7177 bfd_vma insn;
7178
7179 insn = bfd_get_16 (input_bfd, hit_data) << 16;
7180 insn |= bfd_get_16 (input_bfd, hit_data + 2);
7181
7182 if (globals->use_rel)
7183 {
7184 addend = ((insn >> 4) & 0xf000)
7185 | ((insn >> 15) & 0x0800)
7186 | ((insn >> 4) & 0x0700)
7187 | (insn & 0x00ff);
7188 signed_addend = (addend ^ 0x8000) - 0x8000;
7189 }
7190
7191 value += signed_addend;
7192
7193 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
7194 value -= (input_section->output_section->vma
7195 + input_section->output_offset + rel->r_offset);
7196
7197 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
7198 return bfd_reloc_overflow;
7199
7200 if (sym_flags == STT_ARM_TFUNC)
7201 value |= 1;
7202
7203 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
7204 || r_type == R_ARM_THM_MOVT_BREL)
7205 value >>= 16;
7206
7207 insn &= 0xfbf08f00;
7208 insn |= (value & 0xf000) << 4;
7209 insn |= (value & 0x0800) << 15;
7210 insn |= (value & 0x0700) << 4;
7211 insn |= (value & 0x00ff);
7212
7213 bfd_put_16 (input_bfd, insn >> 16, hit_data);
7214 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
7215 }
7216 return bfd_reloc_ok;
7217
7218 case R_ARM_ALU_PC_G0_NC:
7219 case R_ARM_ALU_PC_G1_NC:
7220 case R_ARM_ALU_PC_G0:
7221 case R_ARM_ALU_PC_G1:
7222 case R_ARM_ALU_PC_G2:
7223 case R_ARM_ALU_SB_G0_NC:
7224 case R_ARM_ALU_SB_G1_NC:
7225 case R_ARM_ALU_SB_G0:
7226 case R_ARM_ALU_SB_G1:
7227 case R_ARM_ALU_SB_G2:
7228 {
7229 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7230 bfd_vma pc = input_section->output_section->vma
7231 + input_section->output_offset + rel->r_offset;
7232 /* sb should be the origin of the *segment* containing the symbol.
7233 It is not clear how to obtain this OS-dependent value, so we
7234 make an arbitrary choice of zero. */
7235 bfd_vma sb = 0;
7236 bfd_vma residual;
7237 bfd_vma g_n;
7238 bfd_signed_vma signed_value;
7239 int group = 0;
7240
7241 /* Determine which group of bits to select. */
7242 switch (r_type)
7243 {
7244 case R_ARM_ALU_PC_G0_NC:
7245 case R_ARM_ALU_PC_G0:
7246 case R_ARM_ALU_SB_G0_NC:
7247 case R_ARM_ALU_SB_G0:
7248 group = 0;
7249 break;
7250
7251 case R_ARM_ALU_PC_G1_NC:
7252 case R_ARM_ALU_PC_G1:
7253 case R_ARM_ALU_SB_G1_NC:
7254 case R_ARM_ALU_SB_G1:
7255 group = 1;
7256 break;
7257
7258 case R_ARM_ALU_PC_G2:
7259 case R_ARM_ALU_SB_G2:
7260 group = 2;
7261 break;
7262
7263 default:
7264 abort ();
7265 }
7266
7267 /* If REL, extract the addend from the insn. If RELA, it will
7268 have already been fetched for us. */
7269 if (globals->use_rel)
7270 {
7271 int negative;
7272 bfd_vma constant = insn & 0xff;
7273 bfd_vma rotation = (insn & 0xf00) >> 8;
7274
7275 if (rotation == 0)
7276 signed_addend = constant;
7277 else
7278 {
7279 /* Compensate for the fact that in the instruction, the
7280 rotation is stored in multiples of 2 bits. */
7281 rotation *= 2;
7282
7283 /* Rotate "constant" right by "rotation" bits. */
7284 signed_addend = (constant >> rotation) |
7285 (constant << (8 * sizeof (bfd_vma) - rotation));
7286 }
7287
7288 /* Determine if the instruction is an ADD or a SUB.
7289 (For REL, this determines the sign of the addend.) */
7290 negative = identify_add_or_sub (insn);
7291 if (negative == 0)
7292 {
7293 (*_bfd_error_handler)
7294 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
7295 input_bfd, input_section,
7296 (long) rel->r_offset, howto->name);
7297 return bfd_reloc_overflow;
7298 }
7299
7300 signed_addend *= negative;
7301 }
7302
7303 /* Compute the value (X) to go in the place. */
7304 if (r_type == R_ARM_ALU_PC_G0_NC
7305 || r_type == R_ARM_ALU_PC_G1_NC
7306 || r_type == R_ARM_ALU_PC_G0
7307 || r_type == R_ARM_ALU_PC_G1
7308 || r_type == R_ARM_ALU_PC_G2)
7309 /* PC relative. */
7310 signed_value = value - pc + signed_addend;
7311 else
7312 /* Section base relative. */
7313 signed_value = value - sb + signed_addend;
7314
7315 /* If the target symbol is a Thumb function, then set the
7316 Thumb bit in the address. */
7317 if (sym_flags == STT_ARM_TFUNC)
7318 signed_value |= 1;
7319
7320 /* Calculate the value of the relevant G_n, in encoded
7321 constant-with-rotation format. */
7322 g_n = calculate_group_reloc_mask (abs (signed_value), group,
7323 &residual);
7324
7325 /* Check for overflow if required. */
7326 if ((r_type == R_ARM_ALU_PC_G0
7327 || r_type == R_ARM_ALU_PC_G1
7328 || r_type == R_ARM_ALU_PC_G2
7329 || r_type == R_ARM_ALU_SB_G0
7330 || r_type == R_ARM_ALU_SB_G1
7331 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
7332 {
7333 (*_bfd_error_handler)
7334 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7335 input_bfd, input_section,
7336 (long) rel->r_offset, abs (signed_value), howto->name);
7337 return bfd_reloc_overflow;
7338 }
7339
7340 /* Mask out the value and the ADD/SUB part of the opcode; take care
7341 not to destroy the S bit. */
7342 insn &= 0xff1ff000;
7343
7344 /* Set the opcode according to whether the value to go in the
7345 place is negative. */
7346 if (signed_value < 0)
7347 insn |= 1 << 22;
7348 else
7349 insn |= 1 << 23;
7350
7351 /* Encode the offset. */
7352 insn |= g_n;
7353
7354 bfd_put_32 (input_bfd, insn, hit_data);
7355 }
7356 return bfd_reloc_ok;
7357
7358 case R_ARM_LDR_PC_G0:
7359 case R_ARM_LDR_PC_G1:
7360 case R_ARM_LDR_PC_G2:
7361 case R_ARM_LDR_SB_G0:
7362 case R_ARM_LDR_SB_G1:
7363 case R_ARM_LDR_SB_G2:
7364 {
7365 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7366 bfd_vma pc = input_section->output_section->vma
7367 + input_section->output_offset + rel->r_offset;
7368 bfd_vma sb = 0; /* See note above. */
7369 bfd_vma residual;
7370 bfd_signed_vma signed_value;
7371 int group = 0;
7372
7373 /* Determine which groups of bits to calculate. */
7374 switch (r_type)
7375 {
7376 case R_ARM_LDR_PC_G0:
7377 case R_ARM_LDR_SB_G0:
7378 group = 0;
7379 break;
7380
7381 case R_ARM_LDR_PC_G1:
7382 case R_ARM_LDR_SB_G1:
7383 group = 1;
7384 break;
7385
7386 case R_ARM_LDR_PC_G2:
7387 case R_ARM_LDR_SB_G2:
7388 group = 2;
7389 break;
7390
7391 default:
7392 abort ();
7393 }
7394
7395 /* If REL, extract the addend from the insn. If RELA, it will
7396 have already been fetched for us. */
7397 if (globals->use_rel)
7398 {
7399 int negative = (insn & (1 << 23)) ? 1 : -1;
7400 signed_addend = negative * (insn & 0xfff);
7401 }
7402
7403 /* Compute the value (X) to go in the place. */
7404 if (r_type == R_ARM_LDR_PC_G0
7405 || r_type == R_ARM_LDR_PC_G1
7406 || r_type == R_ARM_LDR_PC_G2)
7407 /* PC relative. */
7408 signed_value = value - pc + signed_addend;
7409 else
7410 /* Section base relative. */
7411 signed_value = value - sb + signed_addend;
7412
7413 /* Calculate the value of the relevant G_{n-1} to obtain
7414 the residual at that stage. */
7415 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7416
7417 /* Check for overflow. */
7418 if (residual >= 0x1000)
7419 {
7420 (*_bfd_error_handler)
7421 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7422 input_bfd, input_section,
7423 (long) rel->r_offset, abs (signed_value), howto->name);
7424 return bfd_reloc_overflow;
7425 }
7426
7427 /* Mask out the value and U bit. */
7428 insn &= 0xff7ff000;
7429
7430 /* Set the U bit if the value to go in the place is non-negative. */
7431 if (signed_value >= 0)
7432 insn |= 1 << 23;
7433
7434 /* Encode the offset. */
7435 insn |= residual;
7436
7437 bfd_put_32 (input_bfd, insn, hit_data);
7438 }
7439 return bfd_reloc_ok;
7440
7441 case R_ARM_LDRS_PC_G0:
7442 case R_ARM_LDRS_PC_G1:
7443 case R_ARM_LDRS_PC_G2:
7444 case R_ARM_LDRS_SB_G0:
7445 case R_ARM_LDRS_SB_G1:
7446 case R_ARM_LDRS_SB_G2:
7447 {
7448 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7449 bfd_vma pc = input_section->output_section->vma
7450 + input_section->output_offset + rel->r_offset;
7451 bfd_vma sb = 0; /* See note above. */
7452 bfd_vma residual;
7453 bfd_signed_vma signed_value;
7454 int group = 0;
7455
7456 /* Determine which groups of bits to calculate. */
7457 switch (r_type)
7458 {
7459 case R_ARM_LDRS_PC_G0:
7460 case R_ARM_LDRS_SB_G0:
7461 group = 0;
7462 break;
7463
7464 case R_ARM_LDRS_PC_G1:
7465 case R_ARM_LDRS_SB_G1:
7466 group = 1;
7467 break;
7468
7469 case R_ARM_LDRS_PC_G2:
7470 case R_ARM_LDRS_SB_G2:
7471 group = 2;
7472 break;
7473
7474 default:
7475 abort ();
7476 }
7477
7478 /* If REL, extract the addend from the insn. If RELA, it will
7479 have already been fetched for us. */
7480 if (globals->use_rel)
7481 {
7482 int negative = (insn & (1 << 23)) ? 1 : -1;
7483 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
7484 }
7485
7486 /* Compute the value (X) to go in the place. */
7487 if (r_type == R_ARM_LDRS_PC_G0
7488 || r_type == R_ARM_LDRS_PC_G1
7489 || r_type == R_ARM_LDRS_PC_G2)
7490 /* PC relative. */
7491 signed_value = value - pc + signed_addend;
7492 else
7493 /* Section base relative. */
7494 signed_value = value - sb + signed_addend;
7495
7496 /* Calculate the value of the relevant G_{n-1} to obtain
7497 the residual at that stage. */
7498 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7499
7500 /* Check for overflow. */
7501 if (residual >= 0x100)
7502 {
7503 (*_bfd_error_handler)
7504 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7505 input_bfd, input_section,
7506 (long) rel->r_offset, abs (signed_value), howto->name);
7507 return bfd_reloc_overflow;
7508 }
7509
7510 /* Mask out the value and U bit. */
7511 insn &= 0xff7ff0f0;
7512
7513 /* Set the U bit if the value to go in the place is non-negative. */
7514 if (signed_value >= 0)
7515 insn |= 1 << 23;
7516
7517 /* Encode the offset. */
7518 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
7519
7520 bfd_put_32 (input_bfd, insn, hit_data);
7521 }
7522 return bfd_reloc_ok;
7523
7524 case R_ARM_LDC_PC_G0:
7525 case R_ARM_LDC_PC_G1:
7526 case R_ARM_LDC_PC_G2:
7527 case R_ARM_LDC_SB_G0:
7528 case R_ARM_LDC_SB_G1:
7529 case R_ARM_LDC_SB_G2:
7530 {
7531 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7532 bfd_vma pc = input_section->output_section->vma
7533 + input_section->output_offset + rel->r_offset;
7534 bfd_vma sb = 0; /* See note above. */
7535 bfd_vma residual;
7536 bfd_signed_vma signed_value;
7537 int group = 0;
7538
7539 /* Determine which groups of bits to calculate. */
7540 switch (r_type)
7541 {
7542 case R_ARM_LDC_PC_G0:
7543 case R_ARM_LDC_SB_G0:
7544 group = 0;
7545 break;
7546
7547 case R_ARM_LDC_PC_G1:
7548 case R_ARM_LDC_SB_G1:
7549 group = 1;
7550 break;
7551
7552 case R_ARM_LDC_PC_G2:
7553 case R_ARM_LDC_SB_G2:
7554 group = 2;
7555 break;
7556
7557 default:
7558 abort ();
7559 }
7560
7561 /* If REL, extract the addend from the insn. If RELA, it will
7562 have already been fetched for us. */
7563 if (globals->use_rel)
7564 {
7565 int negative = (insn & (1 << 23)) ? 1 : -1;
7566 signed_addend = negative * ((insn & 0xff) << 2);
7567 }
7568
7569 /* Compute the value (X) to go in the place. */
7570 if (r_type == R_ARM_LDC_PC_G0
7571 || r_type == R_ARM_LDC_PC_G1
7572 || r_type == R_ARM_LDC_PC_G2)
7573 /* PC relative. */
7574 signed_value = value - pc + signed_addend;
7575 else
7576 /* Section base relative. */
7577 signed_value = value - sb + signed_addend;
7578
7579 /* Calculate the value of the relevant G_{n-1} to obtain
7580 the residual at that stage. */
7581 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7582
7583 /* Check for overflow. (The absolute value to go in the place must be
7584 divisible by four and, after having been divided by four, must
7585 fit in eight bits.) */
7586 if ((residual & 0x3) != 0 || residual >= 0x400)
7587 {
7588 (*_bfd_error_handler)
7589 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7590 input_bfd, input_section,
7591 (long) rel->r_offset, abs (signed_value), howto->name);
7592 return bfd_reloc_overflow;
7593 }
7594
7595 /* Mask out the value and U bit. */
7596 insn &= 0xff7fff00;
7597
7598 /* Set the U bit if the value to go in the place is non-negative. */
7599 if (signed_value >= 0)
7600 insn |= 1 << 23;
7601
7602 /* Encode the offset. */
7603 insn |= residual >> 2;
7604
7605 bfd_put_32 (input_bfd, insn, hit_data);
7606 }
7607 return bfd_reloc_ok;
7608
7609 default:
7610 return bfd_reloc_notsupported;
7611 }
7612 }
7613
7614 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
7615 static void
7616 arm_add_to_rel (bfd * abfd,
7617 bfd_byte * address,
7618 reloc_howto_type * howto,
7619 bfd_signed_vma increment)
7620 {
7621 bfd_signed_vma addend;
7622
7623 if (howto->type == R_ARM_THM_CALL
7624 || howto->type == R_ARM_THM_JUMP24)
7625 {
7626 int upper_insn, lower_insn;
7627 int upper, lower;
7628
7629 upper_insn = bfd_get_16 (abfd, address);
7630 lower_insn = bfd_get_16 (abfd, address + 2);
7631 upper = upper_insn & 0x7ff;
7632 lower = lower_insn & 0x7ff;
7633
7634 addend = (upper << 12) | (lower << 1);
7635 addend += increment;
7636 addend >>= 1;
7637
7638 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
7639 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
7640
7641 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
7642 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
7643 }
7644 else
7645 {
7646 bfd_vma contents;
7647
7648 contents = bfd_get_32 (abfd, address);
7649
7650 /* Get the (signed) value from the instruction. */
7651 addend = contents & howto->src_mask;
7652 if (addend & ((howto->src_mask + 1) >> 1))
7653 {
7654 bfd_signed_vma mask;
7655
7656 mask = -1;
7657 mask &= ~ howto->src_mask;
7658 addend |= mask;
7659 }
7660
7661 /* Add in the increment, (which is a byte value). */
7662 switch (howto->type)
7663 {
7664 default:
7665 addend += increment;
7666 break;
7667
7668 case R_ARM_PC24:
7669 case R_ARM_PLT32:
7670 case R_ARM_CALL:
7671 case R_ARM_JUMP24:
7672 addend <<= howto->size;
7673 addend += increment;
7674
7675 /* Should we check for overflow here ? */
7676
7677 /* Drop any undesired bits. */
7678 addend >>= howto->rightshift;
7679 break;
7680 }
7681
7682 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
7683
7684 bfd_put_32 (abfd, contents, address);
7685 }
7686 }
7687
7688 #define IS_ARM_TLS_RELOC(R_TYPE) \
7689 ((R_TYPE) == R_ARM_TLS_GD32 \
7690 || (R_TYPE) == R_ARM_TLS_LDO32 \
7691 || (R_TYPE) == R_ARM_TLS_LDM32 \
7692 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
7693 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
7694 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
7695 || (R_TYPE) == R_ARM_TLS_LE32 \
7696 || (R_TYPE) == R_ARM_TLS_IE32)
7697
7698 /* Relocate an ARM ELF section. */
7699
7700 static bfd_boolean
7701 elf32_arm_relocate_section (bfd * output_bfd,
7702 struct bfd_link_info * info,
7703 bfd * input_bfd,
7704 asection * input_section,
7705 bfd_byte * contents,
7706 Elf_Internal_Rela * relocs,
7707 Elf_Internal_Sym * local_syms,
7708 asection ** local_sections)
7709 {
7710 Elf_Internal_Shdr *symtab_hdr;
7711 struct elf_link_hash_entry **sym_hashes;
7712 Elf_Internal_Rela *rel;
7713 Elf_Internal_Rela *relend;
7714 const char *name;
7715 struct elf32_arm_link_hash_table * globals;
7716
7717 globals = elf32_arm_hash_table (info);
7718
7719 symtab_hdr = & elf_symtab_hdr (input_bfd);
7720 sym_hashes = elf_sym_hashes (input_bfd);
7721
7722 rel = relocs;
7723 relend = relocs + input_section->reloc_count;
7724 for (; rel < relend; rel++)
7725 {
7726 int r_type;
7727 reloc_howto_type * howto;
7728 unsigned long r_symndx;
7729 Elf_Internal_Sym * sym;
7730 asection * sec;
7731 struct elf_link_hash_entry * h;
7732 bfd_vma relocation;
7733 bfd_reloc_status_type r;
7734 arelent bfd_reloc;
7735 char sym_type;
7736 bfd_boolean unresolved_reloc = FALSE;
7737 char *error_message = NULL;
7738
7739 r_symndx = ELF32_R_SYM (rel->r_info);
7740 r_type = ELF32_R_TYPE (rel->r_info);
7741 r_type = arm_real_reloc_type (globals, r_type);
7742
7743 if ( r_type == R_ARM_GNU_VTENTRY
7744 || r_type == R_ARM_GNU_VTINHERIT)
7745 continue;
7746
7747 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
7748 howto = bfd_reloc.howto;
7749
7750 h = NULL;
7751 sym = NULL;
7752 sec = NULL;
7753
7754 if (r_symndx < symtab_hdr->sh_info)
7755 {
7756 sym = local_syms + r_symndx;
7757 sym_type = ELF32_ST_TYPE (sym->st_info);
7758 sec = local_sections[r_symndx];
7759 if (globals->use_rel)
7760 {
7761 relocation = (sec->output_section->vma
7762 + sec->output_offset
7763 + sym->st_value);
7764 if (!info->relocatable
7765 && (sec->flags & SEC_MERGE)
7766 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
7767 {
7768 asection *msec;
7769 bfd_vma addend, value;
7770
7771 switch (r_type)
7772 {
7773 case R_ARM_MOVW_ABS_NC:
7774 case R_ARM_MOVT_ABS:
7775 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7776 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
7777 addend = (addend ^ 0x8000) - 0x8000;
7778 break;
7779
7780 case R_ARM_THM_MOVW_ABS_NC:
7781 case R_ARM_THM_MOVT_ABS:
7782 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
7783 << 16;
7784 value |= bfd_get_16 (input_bfd,
7785 contents + rel->r_offset + 2);
7786 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
7787 | ((value & 0x04000000) >> 15);
7788 addend = (addend ^ 0x8000) - 0x8000;
7789 break;
7790
7791 default:
7792 if (howto->rightshift
7793 || (howto->src_mask & (howto->src_mask + 1)))
7794 {
7795 (*_bfd_error_handler)
7796 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
7797 input_bfd, input_section,
7798 (long) rel->r_offset, howto->name);
7799 return FALSE;
7800 }
7801
7802 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7803
7804 /* Get the (signed) value from the instruction. */
7805 addend = value & howto->src_mask;
7806 if (addend & ((howto->src_mask + 1) >> 1))
7807 {
7808 bfd_signed_vma mask;
7809
7810 mask = -1;
7811 mask &= ~ howto->src_mask;
7812 addend |= mask;
7813 }
7814 break;
7815 }
7816
7817 msec = sec;
7818 addend =
7819 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
7820 - relocation;
7821 addend += msec->output_section->vma + msec->output_offset;
7822
7823 /* Cases here must match those in the preceeding
7824 switch statement. */
7825 switch (r_type)
7826 {
7827 case R_ARM_MOVW_ABS_NC:
7828 case R_ARM_MOVT_ABS:
7829 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
7830 | (addend & 0xfff);
7831 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
7832 break;
7833
7834 case R_ARM_THM_MOVW_ABS_NC:
7835 case R_ARM_THM_MOVT_ABS:
7836 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
7837 | (addend & 0xff) | ((addend & 0x0800) << 15);
7838 bfd_put_16 (input_bfd, value >> 16,
7839 contents + rel->r_offset);
7840 bfd_put_16 (input_bfd, value,
7841 contents + rel->r_offset + 2);
7842 break;
7843
7844 default:
7845 value = (value & ~ howto->dst_mask)
7846 | (addend & howto->dst_mask);
7847 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
7848 break;
7849 }
7850 }
7851 }
7852 else
7853 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7854 }
7855 else
7856 {
7857 bfd_boolean warned;
7858
7859 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7860 r_symndx, symtab_hdr, sym_hashes,
7861 h, sec, relocation,
7862 unresolved_reloc, warned);
7863
7864 sym_type = h->type;
7865 }
7866
7867 if (sec != NULL && elf_discarded_section (sec))
7868 {
7869 /* For relocs against symbols from removed linkonce sections,
7870 or sections discarded by a linker script, we just want the
7871 section contents zeroed. Avoid any special processing. */
7872 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
7873 rel->r_info = 0;
7874 rel->r_addend = 0;
7875 continue;
7876 }
7877
7878 if (info->relocatable)
7879 {
7880 /* This is a relocatable link. We don't have to change
7881 anything, unless the reloc is against a section symbol,
7882 in which case we have to adjust according to where the
7883 section symbol winds up in the output section. */
7884 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
7885 {
7886 if (globals->use_rel)
7887 arm_add_to_rel (input_bfd, contents + rel->r_offset,
7888 howto, (bfd_signed_vma) sec->output_offset);
7889 else
7890 rel->r_addend += sec->output_offset;
7891 }
7892 continue;
7893 }
7894
7895 if (h != NULL)
7896 name = h->root.root.string;
7897 else
7898 {
7899 name = (bfd_elf_string_from_elf_section
7900 (input_bfd, symtab_hdr->sh_link, sym->st_name));
7901 if (name == NULL || *name == '\0')
7902 name = bfd_section_name (input_bfd, sec);
7903 }
7904
7905 if (r_symndx != 0
7906 && r_type != R_ARM_NONE
7907 && (h == NULL
7908 || h->root.type == bfd_link_hash_defined
7909 || h->root.type == bfd_link_hash_defweak)
7910 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7911 {
7912 (*_bfd_error_handler)
7913 ((sym_type == STT_TLS
7914 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
7915 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
7916 input_bfd,
7917 input_section,
7918 (long) rel->r_offset,
7919 howto->name,
7920 name);
7921 }
7922
7923 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
7924 input_section, contents, rel,
7925 relocation, info, sec, name,
7926 (h ? ELF_ST_TYPE (h->type) :
7927 ELF_ST_TYPE (sym->st_info)), h,
7928 &unresolved_reloc, &error_message);
7929
7930 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
7931 because such sections are not SEC_ALLOC and thus ld.so will
7932 not process them. */
7933 if (unresolved_reloc
7934 && !((input_section->flags & SEC_DEBUGGING) != 0
7935 && h->def_dynamic))
7936 {
7937 (*_bfd_error_handler)
7938 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7939 input_bfd,
7940 input_section,
7941 (long) rel->r_offset,
7942 howto->name,
7943 h->root.root.string);
7944 return FALSE;
7945 }
7946
7947 if (r != bfd_reloc_ok)
7948 {
7949 switch (r)
7950 {
7951 case bfd_reloc_overflow:
7952 /* If the overflowing reloc was to an undefined symbol,
7953 we have already printed one error message and there
7954 is no point complaining again. */
7955 if ((! h ||
7956 h->root.type != bfd_link_hash_undefined)
7957 && (!((*info->callbacks->reloc_overflow)
7958 (info, (h ? &h->root : NULL), name, howto->name,
7959 (bfd_vma) 0, input_bfd, input_section,
7960 rel->r_offset))))
7961 return FALSE;
7962 break;
7963
7964 case bfd_reloc_undefined:
7965 if (!((*info->callbacks->undefined_symbol)
7966 (info, name, input_bfd, input_section,
7967 rel->r_offset, TRUE)))
7968 return FALSE;
7969 break;
7970
7971 case bfd_reloc_outofrange:
7972 error_message = _("out of range");
7973 goto common_error;
7974
7975 case bfd_reloc_notsupported:
7976 error_message = _("unsupported relocation");
7977 goto common_error;
7978
7979 case bfd_reloc_dangerous:
7980 /* error_message should already be set. */
7981 goto common_error;
7982
7983 default:
7984 error_message = _("unknown error");
7985 /* Fall through. */
7986
7987 common_error:
7988 BFD_ASSERT (error_message != NULL);
7989 if (!((*info->callbacks->reloc_dangerous)
7990 (info, error_message, input_bfd, input_section,
7991 rel->r_offset)))
7992 return FALSE;
7993 break;
7994 }
7995 }
7996 }
7997
7998 return TRUE;
7999 }
8000
8001 /* Set the right machine number. */
8002
8003 static bfd_boolean
8004 elf32_arm_object_p (bfd *abfd)
8005 {
8006 unsigned int mach;
8007
8008 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
8009
8010 if (mach != bfd_mach_arm_unknown)
8011 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8012
8013 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
8014 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
8015
8016 else
8017 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8018
8019 return TRUE;
8020 }
8021
8022 /* Function to keep ARM specific flags in the ELF header. */
8023
8024 static bfd_boolean
8025 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
8026 {
8027 if (elf_flags_init (abfd)
8028 && elf_elfheader (abfd)->e_flags != flags)
8029 {
8030 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
8031 {
8032 if (flags & EF_ARM_INTERWORK)
8033 (*_bfd_error_handler)
8034 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
8035 abfd);
8036 else
8037 _bfd_error_handler
8038 (_("Warning: Clearing the interworking flag of %B due to outside request"),
8039 abfd);
8040 }
8041 }
8042 else
8043 {
8044 elf_elfheader (abfd)->e_flags = flags;
8045 elf_flags_init (abfd) = TRUE;
8046 }
8047
8048 return TRUE;
8049 }
8050
8051 /* Copy backend specific data from one object module to another. */
8052
8053 static bfd_boolean
8054 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
8055 {
8056 flagword in_flags;
8057 flagword out_flags;
8058
8059 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
8060 return TRUE;
8061
8062 in_flags = elf_elfheader (ibfd)->e_flags;
8063 out_flags = elf_elfheader (obfd)->e_flags;
8064
8065 if (elf_flags_init (obfd)
8066 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
8067 && in_flags != out_flags)
8068 {
8069 /* Cannot mix APCS26 and APCS32 code. */
8070 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
8071 return FALSE;
8072
8073 /* Cannot mix float APCS and non-float APCS code. */
8074 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
8075 return FALSE;
8076
8077 /* If the src and dest have different interworking flags
8078 then turn off the interworking bit. */
8079 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8080 {
8081 if (out_flags & EF_ARM_INTERWORK)
8082 _bfd_error_handler
8083 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
8084 obfd, ibfd);
8085
8086 in_flags &= ~EF_ARM_INTERWORK;
8087 }
8088
8089 /* Likewise for PIC, though don't warn for this case. */
8090 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
8091 in_flags &= ~EF_ARM_PIC;
8092 }
8093
8094 elf_elfheader (obfd)->e_flags = in_flags;
8095 elf_flags_init (obfd) = TRUE;
8096
8097 /* Also copy the EI_OSABI field. */
8098 elf_elfheader (obfd)->e_ident[EI_OSABI] =
8099 elf_elfheader (ibfd)->e_ident[EI_OSABI];
8100
8101 /* Copy object attributes. */
8102 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8103
8104 return TRUE;
8105 }
8106
8107 /* Values for Tag_ABI_PCS_R9_use. */
8108 enum
8109 {
8110 AEABI_R9_V6,
8111 AEABI_R9_SB,
8112 AEABI_R9_TLS,
8113 AEABI_R9_unused
8114 };
8115
8116 /* Values for Tag_ABI_PCS_RW_data. */
8117 enum
8118 {
8119 AEABI_PCS_RW_data_absolute,
8120 AEABI_PCS_RW_data_PCrel,
8121 AEABI_PCS_RW_data_SBrel,
8122 AEABI_PCS_RW_data_unused
8123 };
8124
8125 /* Values for Tag_ABI_enum_size. */
8126 enum
8127 {
8128 AEABI_enum_unused,
8129 AEABI_enum_short,
8130 AEABI_enum_wide,
8131 AEABI_enum_forced_wide
8132 };
8133
8134 /* Determine whether an object attribute tag takes an integer, a
8135 string or both. */
8136
8137 static int
8138 elf32_arm_obj_attrs_arg_type (int tag)
8139 {
8140 if (tag == Tag_compatibility)
8141 return 3;
8142 else if (tag == 4 || tag == 5)
8143 return 2;
8144 else if (tag < 32)
8145 return 1;
8146 else
8147 return (tag & 1) != 0 ? 2 : 1;
8148 }
8149
8150 static void
8151 elf32_arm_copy_one_eabi_other_attribute (bfd *ibfd, bfd *obfd, obj_attribute_list *in_list)
8152 {
8153 switch (in_list->tag)
8154 {
8155 case Tag_VFP_HP_extension:
8156 case Tag_ABI_FP_16bit_format:
8157 bfd_elf_add_obj_attr_int (obfd, OBJ_ATTR_PROC, in_list->tag, in_list->attr.i);
8158 break;
8159
8160 default:
8161 if ((in_list->tag & 127) < 64)
8162 {
8163 _bfd_error_handler
8164 (_("Warning: %B: Unknown EABI object attribute %d"), ibfd, in_list->tag);
8165 break;
8166 }
8167 }
8168 }
8169
8170 static void
8171 elf32_arm_copy_eabi_other_attribute_list (bfd *ibfd, bfd *obfd, obj_attribute_list *in_list)
8172 {
8173 for (; in_list; in_list = in_list->next )
8174 elf32_arm_copy_one_eabi_other_attribute (ibfd, obfd, in_list);
8175 }
8176
8177 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
8178 are conflicting attributes. */
8179
8180 static bfd_boolean
8181 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
8182 {
8183 obj_attribute *in_attr;
8184 obj_attribute *out_attr;
8185 obj_attribute_list *in_list;
8186 obj_attribute_list *out_list;
8187 /* Some tags have 0 = don't care, 1 = strong requirement,
8188 2 = weak requirement. */
8189 static const int order_312[3] = {3, 1, 2};
8190 /* For use with Tag_VFP_arch. */
8191 static const int order_01243[5] = {0, 1, 2, 4, 3};
8192 int i;
8193
8194 if (!elf_known_obj_attributes_proc (obfd)[0].i)
8195 {
8196 /* This is the first object. Copy the attributes. */
8197 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8198
8199 /* Use the Tag_null value to indicate the attributes have been
8200 initialized. */
8201 elf_known_obj_attributes_proc (obfd)[0].i = 1;
8202
8203 return TRUE;
8204 }
8205
8206 in_attr = elf_known_obj_attributes_proc (ibfd);
8207 out_attr = elf_known_obj_attributes_proc (obfd);
8208 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
8209 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
8210 {
8211 /* Ignore mismatches if the object doesn't use floating point. */
8212 if (out_attr[Tag_ABI_FP_number_model].i == 0)
8213 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
8214 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
8215 {
8216 _bfd_error_handler
8217 (_("ERROR: %B uses VFP register arguments, %B does not"),
8218 ibfd, obfd);
8219 return FALSE;
8220 }
8221 }
8222
8223 for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
8224 {
8225 /* Merge this attribute with existing attributes. */
8226 switch (i)
8227 {
8228 case Tag_CPU_raw_name:
8229 case Tag_CPU_name:
8230 /* Use whichever has the greatest architecture requirements. We
8231 won't necessarily have both the above tags, so make sure input
8232 name is non-NULL. */
8233 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i
8234 && in_attr[i].s)
8235 out_attr[i].s = _bfd_elf_attr_strdup (obfd, in_attr[i].s);
8236 break;
8237
8238 case Tag_ABI_optimization_goals:
8239 case Tag_ABI_FP_optimization_goals:
8240 /* Use the first value seen. */
8241 break;
8242
8243 case Tag_CPU_arch:
8244 case Tag_ARM_ISA_use:
8245 case Tag_THUMB_ISA_use:
8246 case Tag_WMMX_arch:
8247 case Tag_NEON_arch:
8248 /* ??? Do NEON and WMMX conflict? */
8249 case Tag_ABI_FP_rounding:
8250 case Tag_ABI_FP_denormal:
8251 case Tag_ABI_FP_exceptions:
8252 case Tag_ABI_FP_user_exceptions:
8253 case Tag_ABI_FP_number_model:
8254 case Tag_ABI_align8_preserved:
8255 case Tag_ABI_HardFP_use:
8256 /* Use the largest value specified. */
8257 if (in_attr[i].i > out_attr[i].i)
8258 out_attr[i].i = in_attr[i].i;
8259 break;
8260
8261 case Tag_CPU_arch_profile:
8262 /* Warn if conflicting architecture profiles used. */
8263 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
8264 {
8265 _bfd_error_handler
8266 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
8267 ibfd, in_attr[i].i, out_attr[i].i);
8268 return FALSE;
8269 }
8270 if (in_attr[i].i)
8271 out_attr[i].i = in_attr[i].i;
8272 break;
8273 case Tag_VFP_arch:
8274 if (in_attr[i].i > 4 || out_attr[i].i > 4
8275 || order_01243[in_attr[i].i] > order_01243[out_attr[i].i])
8276 out_attr[i].i = in_attr[i].i;
8277 break;
8278 case Tag_PCS_config:
8279 if (out_attr[i].i == 0)
8280 out_attr[i].i = in_attr[i].i;
8281 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
8282 {
8283 /* It's sometimes ok to mix different configs, so this is only
8284 a warning. */
8285 _bfd_error_handler
8286 (_("Warning: %B: Conflicting platform configuration"), ibfd);
8287 }
8288 break;
8289 case Tag_ABI_PCS_R9_use:
8290 if (in_attr[i].i != out_attr[i].i
8291 && out_attr[i].i != AEABI_R9_unused
8292 && in_attr[i].i != AEABI_R9_unused)
8293 {
8294 _bfd_error_handler
8295 (_("ERROR: %B: Conflicting use of R9"), ibfd);
8296 return FALSE;
8297 }
8298 if (out_attr[i].i == AEABI_R9_unused)
8299 out_attr[i].i = in_attr[i].i;
8300 break;
8301 case Tag_ABI_PCS_RW_data:
8302 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
8303 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
8304 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
8305 {
8306 _bfd_error_handler
8307 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
8308 ibfd);
8309 return FALSE;
8310 }
8311 /* Use the smallest value specified. */
8312 if (in_attr[i].i < out_attr[i].i)
8313 out_attr[i].i = in_attr[i].i;
8314 break;
8315 case Tag_ABI_PCS_RO_data:
8316 /* Use the smallest value specified. */
8317 if (in_attr[i].i < out_attr[i].i)
8318 out_attr[i].i = in_attr[i].i;
8319 break;
8320 case Tag_ABI_PCS_GOT_use:
8321 if (in_attr[i].i > 2 || out_attr[i].i > 2
8322 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
8323 out_attr[i].i = in_attr[i].i;
8324 break;
8325 case Tag_ABI_PCS_wchar_t:
8326 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
8327 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
8328 {
8329 _bfd_error_handler
8330 (_("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"),
8331 ibfd, in_attr[i].i, out_attr[i].i);
8332 }
8333 else if (in_attr[i].i && !out_attr[i].i)
8334 out_attr[i].i = in_attr[i].i;
8335 break;
8336 case Tag_ABI_align8_needed:
8337 /* ??? Check against Tag_ABI_align8_preserved. */
8338 if (in_attr[i].i > 2 || out_attr[i].i > 2
8339 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
8340 out_attr[i].i = in_attr[i].i;
8341 break;
8342 case Tag_ABI_enum_size:
8343 if (in_attr[i].i != AEABI_enum_unused)
8344 {
8345 if (out_attr[i].i == AEABI_enum_unused
8346 || out_attr[i].i == AEABI_enum_forced_wide)
8347 {
8348 /* The existing object is compatible with anything.
8349 Use whatever requirements the new object has. */
8350 out_attr[i].i = in_attr[i].i;
8351 }
8352 else if (in_attr[i].i != AEABI_enum_forced_wide
8353 && out_attr[i].i != in_attr[i].i
8354 && !elf_arm_tdata (obfd)->no_enum_size_warning)
8355 {
8356 const char *aeabi_enum_names[] =
8357 { "", "variable-size", "32-bit", "" };
8358 _bfd_error_handler
8359 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
8360 ibfd, aeabi_enum_names[in_attr[i].i],
8361 aeabi_enum_names[out_attr[i].i]);
8362 }
8363 }
8364 break;
8365 case Tag_ABI_VFP_args:
8366 /* Aready done. */
8367 break;
8368 case Tag_ABI_WMMX_args:
8369 if (in_attr[i].i != out_attr[i].i)
8370 {
8371 _bfd_error_handler
8372 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
8373 ibfd, obfd);
8374 return FALSE;
8375 }
8376 break;
8377
8378 case Tag_compatibility:
8379 /* Merged in target-independent code. */
8380 break;
8381
8382 default: /* All known attributes should be explicitly covered. */
8383 abort ();
8384 }
8385
8386 if (in_attr[i].type && !out_attr[i].type)
8387 switch (in_attr[i].type)
8388 {
8389 case 1:
8390 if (out_attr[i].i)
8391 out_attr[i].type = 1;
8392 break;
8393
8394 case 2:
8395 if (out_attr[i].s)
8396 out_attr[i].type = 2;
8397 break;
8398
8399 default:
8400 abort ();
8401 }
8402 }
8403
8404 /* Merge Tag_compatibility attributes and any common GNU ones. */
8405 _bfd_elf_merge_object_attributes (ibfd, obfd);
8406
8407 /* Check for any attributes not known on ARM. */
8408 in_list = elf_other_obj_attributes_proc (ibfd);
8409 out_list = elf_other_obj_attributes_proc (obfd);
8410
8411 for (; in_list != NULL; )
8412 {
8413 if (out_list == NULL)
8414 {
8415 elf32_arm_copy_eabi_other_attribute_list (ibfd, obfd, in_list);
8416 return TRUE;
8417 }
8418
8419 /* The tags for each list are in numerical order. */
8420 /* If the tags are equal, then merge. */
8421 if (in_list->tag == out_list->tag)
8422 {
8423 switch (in_list->tag)
8424 {
8425 case Tag_VFP_HP_extension:
8426 if (out_list->attr.i == 0)
8427 out_list->attr.i = in_list->attr.i;
8428 break;
8429
8430 case Tag_ABI_FP_16bit_format:
8431 if (in_list->attr.i != 0 && out_list->attr.i != 0)
8432 {
8433 if (in_list->attr.i != out_list->attr.i)
8434 {
8435 _bfd_error_handler
8436 (_("ERROR: fp16 format mismatch between %B and %B"),
8437 ibfd, obfd);
8438 return FALSE;
8439 }
8440 }
8441 if (in_list->attr.i != 0)
8442 out_list->attr.i = in_list->attr.i;
8443 break;
8444
8445 default:
8446 if ((in_list->tag & 127) < 64)
8447 {
8448 _bfd_error_handler
8449 (_("Warning: %B: Unknown EABI object attribute %d"), ibfd, in_list->tag);
8450 break;
8451 }
8452 }
8453 }
8454 else if (in_list->tag < out_list->tag)
8455 {
8456 /* This attribute is in ibfd, but not obfd. Copy to obfd and advance to
8457 next input attribute. */
8458 elf32_arm_copy_one_eabi_other_attribute (ibfd, obfd, in_list);
8459 }
8460 if (in_list->tag <= out_list->tag)
8461 {
8462 in_list = in_list->next;
8463 if (in_list == NULL)
8464 continue;
8465 }
8466 while (out_list && out_list->tag < in_list->tag)
8467 out_list = out_list->next;
8468 }
8469 return TRUE;
8470 }
8471
8472
8473 /* Return TRUE if the two EABI versions are incompatible. */
8474
8475 static bfd_boolean
8476 elf32_arm_versions_compatible (unsigned iver, unsigned over)
8477 {
8478 /* v4 and v5 are the same spec before and after it was released,
8479 so allow mixing them. */
8480 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
8481 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
8482 return TRUE;
8483
8484 return (iver == over);
8485 }
8486
8487 /* Merge backend specific data from an object file to the output
8488 object file when linking. */
8489
8490 static bfd_boolean
8491 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
8492 {
8493 flagword out_flags;
8494 flagword in_flags;
8495 bfd_boolean flags_compatible = TRUE;
8496 asection *sec;
8497
8498 /* Check if we have the same endianess. */
8499 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
8500 return FALSE;
8501
8502 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
8503 return TRUE;
8504
8505 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
8506 return FALSE;
8507
8508 /* The input BFD must have had its flags initialised. */
8509 /* The following seems bogus to me -- The flags are initialized in
8510 the assembler but I don't think an elf_flags_init field is
8511 written into the object. */
8512 /* BFD_ASSERT (elf_flags_init (ibfd)); */
8513
8514 in_flags = elf_elfheader (ibfd)->e_flags;
8515 out_flags = elf_elfheader (obfd)->e_flags;
8516
8517 /* In theory there is no reason why we couldn't handle this. However
8518 in practice it isn't even close to working and there is no real
8519 reason to want it. */
8520 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
8521 && !(ibfd->flags & DYNAMIC)
8522 && (in_flags & EF_ARM_BE8))
8523 {
8524 _bfd_error_handler (_("ERROR: %B is already in final BE8 format"),
8525 ibfd);
8526 return FALSE;
8527 }
8528
8529 if (!elf_flags_init (obfd))
8530 {
8531 /* If the input is the default architecture and had the default
8532 flags then do not bother setting the flags for the output
8533 architecture, instead allow future merges to do this. If no
8534 future merges ever set these flags then they will retain their
8535 uninitialised values, which surprise surprise, correspond
8536 to the default values. */
8537 if (bfd_get_arch_info (ibfd)->the_default
8538 && elf_elfheader (ibfd)->e_flags == 0)
8539 return TRUE;
8540
8541 elf_flags_init (obfd) = TRUE;
8542 elf_elfheader (obfd)->e_flags = in_flags;
8543
8544 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
8545 && bfd_get_arch_info (obfd)->the_default)
8546 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
8547
8548 return TRUE;
8549 }
8550
8551 /* Determine what should happen if the input ARM architecture
8552 does not match the output ARM architecture. */
8553 if (! bfd_arm_merge_machines (ibfd, obfd))
8554 return FALSE;
8555
8556 /* Identical flags must be compatible. */
8557 if (in_flags == out_flags)
8558 return TRUE;
8559
8560 /* Check to see if the input BFD actually contains any sections. If
8561 not, its flags may not have been initialised either, but it
8562 cannot actually cause any incompatiblity. Do not short-circuit
8563 dynamic objects; their section list may be emptied by
8564 elf_link_add_object_symbols.
8565
8566 Also check to see if there are no code sections in the input.
8567 In this case there is no need to check for code specific flags.
8568 XXX - do we need to worry about floating-point format compatability
8569 in data sections ? */
8570 if (!(ibfd->flags & DYNAMIC))
8571 {
8572 bfd_boolean null_input_bfd = TRUE;
8573 bfd_boolean only_data_sections = TRUE;
8574
8575 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8576 {
8577 /* Ignore synthetic glue sections. */
8578 if (strcmp (sec->name, ".glue_7")
8579 && strcmp (sec->name, ".glue_7t"))
8580 {
8581 if ((bfd_get_section_flags (ibfd, sec)
8582 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
8583 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
8584 only_data_sections = FALSE;
8585
8586 null_input_bfd = FALSE;
8587 break;
8588 }
8589 }
8590
8591 if (null_input_bfd || only_data_sections)
8592 return TRUE;
8593 }
8594
8595 /* Complain about various flag mismatches. */
8596 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
8597 EF_ARM_EABI_VERSION (out_flags)))
8598 {
8599 _bfd_error_handler
8600 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
8601 ibfd, obfd,
8602 (in_flags & EF_ARM_EABIMASK) >> 24,
8603 (out_flags & EF_ARM_EABIMASK) >> 24);
8604 return FALSE;
8605 }
8606
8607 /* Not sure what needs to be checked for EABI versions >= 1. */
8608 /* VxWorks libraries do not use these flags. */
8609 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
8610 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
8611 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
8612 {
8613 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
8614 {
8615 _bfd_error_handler
8616 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
8617 ibfd, obfd,
8618 in_flags & EF_ARM_APCS_26 ? 26 : 32,
8619 out_flags & EF_ARM_APCS_26 ? 26 : 32);
8620 flags_compatible = FALSE;
8621 }
8622
8623 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
8624 {
8625 if (in_flags & EF_ARM_APCS_FLOAT)
8626 _bfd_error_handler
8627 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
8628 ibfd, obfd);
8629 else
8630 _bfd_error_handler
8631 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
8632 ibfd, obfd);
8633
8634 flags_compatible = FALSE;
8635 }
8636
8637 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
8638 {
8639 if (in_flags & EF_ARM_VFP_FLOAT)
8640 _bfd_error_handler
8641 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
8642 ibfd, obfd);
8643 else
8644 _bfd_error_handler
8645 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
8646 ibfd, obfd);
8647
8648 flags_compatible = FALSE;
8649 }
8650
8651 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
8652 {
8653 if (in_flags & EF_ARM_MAVERICK_FLOAT)
8654 _bfd_error_handler
8655 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
8656 ibfd, obfd);
8657 else
8658 _bfd_error_handler
8659 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
8660 ibfd, obfd);
8661
8662 flags_compatible = FALSE;
8663 }
8664
8665 #ifdef EF_ARM_SOFT_FLOAT
8666 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
8667 {
8668 /* We can allow interworking between code that is VFP format
8669 layout, and uses either soft float or integer regs for
8670 passing floating point arguments and results. We already
8671 know that the APCS_FLOAT flags match; similarly for VFP
8672 flags. */
8673 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
8674 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
8675 {
8676 if (in_flags & EF_ARM_SOFT_FLOAT)
8677 _bfd_error_handler
8678 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
8679 ibfd, obfd);
8680 else
8681 _bfd_error_handler
8682 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
8683 ibfd, obfd);
8684
8685 flags_compatible = FALSE;
8686 }
8687 }
8688 #endif
8689
8690 /* Interworking mismatch is only a warning. */
8691 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8692 {
8693 if (in_flags & EF_ARM_INTERWORK)
8694 {
8695 _bfd_error_handler
8696 (_("Warning: %B supports interworking, whereas %B does not"),
8697 ibfd, obfd);
8698 }
8699 else
8700 {
8701 _bfd_error_handler
8702 (_("Warning: %B does not support interworking, whereas %B does"),
8703 ibfd, obfd);
8704 }
8705 }
8706 }
8707
8708 return flags_compatible;
8709 }
8710
8711 /* Display the flags field. */
8712
8713 static bfd_boolean
8714 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
8715 {
8716 FILE * file = (FILE *) ptr;
8717 unsigned long flags;
8718
8719 BFD_ASSERT (abfd != NULL && ptr != NULL);
8720
8721 /* Print normal ELF private data. */
8722 _bfd_elf_print_private_bfd_data (abfd, ptr);
8723
8724 flags = elf_elfheader (abfd)->e_flags;
8725 /* Ignore init flag - it may not be set, despite the flags field
8726 containing valid data. */
8727
8728 /* xgettext:c-format */
8729 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
8730
8731 switch (EF_ARM_EABI_VERSION (flags))
8732 {
8733 case EF_ARM_EABI_UNKNOWN:
8734 /* The following flag bits are GNU extensions and not part of the
8735 official ARM ELF extended ABI. Hence they are only decoded if
8736 the EABI version is not set. */
8737 if (flags & EF_ARM_INTERWORK)
8738 fprintf (file, _(" [interworking enabled]"));
8739
8740 if (flags & EF_ARM_APCS_26)
8741 fprintf (file, " [APCS-26]");
8742 else
8743 fprintf (file, " [APCS-32]");
8744
8745 if (flags & EF_ARM_VFP_FLOAT)
8746 fprintf (file, _(" [VFP float format]"));
8747 else if (flags & EF_ARM_MAVERICK_FLOAT)
8748 fprintf (file, _(" [Maverick float format]"));
8749 else
8750 fprintf (file, _(" [FPA float format]"));
8751
8752 if (flags & EF_ARM_APCS_FLOAT)
8753 fprintf (file, _(" [floats passed in float registers]"));
8754
8755 if (flags & EF_ARM_PIC)
8756 fprintf (file, _(" [position independent]"));
8757
8758 if (flags & EF_ARM_NEW_ABI)
8759 fprintf (file, _(" [new ABI]"));
8760
8761 if (flags & EF_ARM_OLD_ABI)
8762 fprintf (file, _(" [old ABI]"));
8763
8764 if (flags & EF_ARM_SOFT_FLOAT)
8765 fprintf (file, _(" [software FP]"));
8766
8767 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
8768 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
8769 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
8770 | EF_ARM_MAVERICK_FLOAT);
8771 break;
8772
8773 case EF_ARM_EABI_VER1:
8774 fprintf (file, _(" [Version1 EABI]"));
8775
8776 if (flags & EF_ARM_SYMSARESORTED)
8777 fprintf (file, _(" [sorted symbol table]"));
8778 else
8779 fprintf (file, _(" [unsorted symbol table]"));
8780
8781 flags &= ~ EF_ARM_SYMSARESORTED;
8782 break;
8783
8784 case EF_ARM_EABI_VER2:
8785 fprintf (file, _(" [Version2 EABI]"));
8786
8787 if (flags & EF_ARM_SYMSARESORTED)
8788 fprintf (file, _(" [sorted symbol table]"));
8789 else
8790 fprintf (file, _(" [unsorted symbol table]"));
8791
8792 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
8793 fprintf (file, _(" [dynamic symbols use segment index]"));
8794
8795 if (flags & EF_ARM_MAPSYMSFIRST)
8796 fprintf (file, _(" [mapping symbols precede others]"));
8797
8798 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
8799 | EF_ARM_MAPSYMSFIRST);
8800 break;
8801
8802 case EF_ARM_EABI_VER3:
8803 fprintf (file, _(" [Version3 EABI]"));
8804 break;
8805
8806 case EF_ARM_EABI_VER4:
8807 fprintf (file, _(" [Version4 EABI]"));
8808 goto eabi;
8809
8810 case EF_ARM_EABI_VER5:
8811 fprintf (file, _(" [Version5 EABI]"));
8812 eabi:
8813 if (flags & EF_ARM_BE8)
8814 fprintf (file, _(" [BE8]"));
8815
8816 if (flags & EF_ARM_LE8)
8817 fprintf (file, _(" [LE8]"));
8818
8819 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
8820 break;
8821
8822 default:
8823 fprintf (file, _(" <EABI version unrecognised>"));
8824 break;
8825 }
8826
8827 flags &= ~ EF_ARM_EABIMASK;
8828
8829 if (flags & EF_ARM_RELEXEC)
8830 fprintf (file, _(" [relocatable executable]"));
8831
8832 if (flags & EF_ARM_HASENTRY)
8833 fprintf (file, _(" [has entry point]"));
8834
8835 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
8836
8837 if (flags)
8838 fprintf (file, _("<Unrecognised flag bits set>"));
8839
8840 fputc ('\n', file);
8841
8842 return TRUE;
8843 }
8844
8845 static int
8846 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
8847 {
8848 switch (ELF_ST_TYPE (elf_sym->st_info))
8849 {
8850 case STT_ARM_TFUNC:
8851 return ELF_ST_TYPE (elf_sym->st_info);
8852
8853 case STT_ARM_16BIT:
8854 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
8855 This allows us to distinguish between data used by Thumb instructions
8856 and non-data (which is probably code) inside Thumb regions of an
8857 executable. */
8858 if (type != STT_OBJECT && type != STT_TLS)
8859 return ELF_ST_TYPE (elf_sym->st_info);
8860 break;
8861
8862 default:
8863 break;
8864 }
8865
8866 return type;
8867 }
8868
8869 static asection *
8870 elf32_arm_gc_mark_hook (asection *sec,
8871 struct bfd_link_info *info,
8872 Elf_Internal_Rela *rel,
8873 struct elf_link_hash_entry *h,
8874 Elf_Internal_Sym *sym)
8875 {
8876 if (h != NULL)
8877 switch (ELF32_R_TYPE (rel->r_info))
8878 {
8879 case R_ARM_GNU_VTINHERIT:
8880 case R_ARM_GNU_VTENTRY:
8881 return NULL;
8882 }
8883
8884 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
8885 }
8886
8887 /* Update the got entry reference counts for the section being removed. */
8888
8889 static bfd_boolean
8890 elf32_arm_gc_sweep_hook (bfd * abfd,
8891 struct bfd_link_info * info,
8892 asection * sec,
8893 const Elf_Internal_Rela * relocs)
8894 {
8895 Elf_Internal_Shdr *symtab_hdr;
8896 struct elf_link_hash_entry **sym_hashes;
8897 bfd_signed_vma *local_got_refcounts;
8898 const Elf_Internal_Rela *rel, *relend;
8899 struct elf32_arm_link_hash_table * globals;
8900
8901 if (info->relocatable)
8902 return TRUE;
8903
8904 globals = elf32_arm_hash_table (info);
8905
8906 elf_section_data (sec)->local_dynrel = NULL;
8907
8908 symtab_hdr = & elf_symtab_hdr (abfd);
8909 sym_hashes = elf_sym_hashes (abfd);
8910 local_got_refcounts = elf_local_got_refcounts (abfd);
8911
8912 check_use_blx (globals);
8913
8914 relend = relocs + sec->reloc_count;
8915 for (rel = relocs; rel < relend; rel++)
8916 {
8917 unsigned long r_symndx;
8918 struct elf_link_hash_entry *h = NULL;
8919 int r_type;
8920
8921 r_symndx = ELF32_R_SYM (rel->r_info);
8922 if (r_symndx >= symtab_hdr->sh_info)
8923 {
8924 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8925 while (h->root.type == bfd_link_hash_indirect
8926 || h->root.type == bfd_link_hash_warning)
8927 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8928 }
8929
8930 r_type = ELF32_R_TYPE (rel->r_info);
8931 r_type = arm_real_reloc_type (globals, r_type);
8932 switch (r_type)
8933 {
8934 case R_ARM_GOT32:
8935 case R_ARM_GOT_PREL:
8936 case R_ARM_TLS_GD32:
8937 case R_ARM_TLS_IE32:
8938 if (h != NULL)
8939 {
8940 if (h->got.refcount > 0)
8941 h->got.refcount -= 1;
8942 }
8943 else if (local_got_refcounts != NULL)
8944 {
8945 if (local_got_refcounts[r_symndx] > 0)
8946 local_got_refcounts[r_symndx] -= 1;
8947 }
8948 break;
8949
8950 case R_ARM_TLS_LDM32:
8951 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
8952 break;
8953
8954 case R_ARM_ABS32:
8955 case R_ARM_ABS32_NOI:
8956 case R_ARM_REL32:
8957 case R_ARM_REL32_NOI:
8958 case R_ARM_PC24:
8959 case R_ARM_PLT32:
8960 case R_ARM_CALL:
8961 case R_ARM_JUMP24:
8962 case R_ARM_PREL31:
8963 case R_ARM_THM_CALL:
8964 case R_ARM_THM_JUMP24:
8965 case R_ARM_THM_JUMP19:
8966 case R_ARM_MOVW_ABS_NC:
8967 case R_ARM_MOVT_ABS:
8968 case R_ARM_MOVW_PREL_NC:
8969 case R_ARM_MOVT_PREL:
8970 case R_ARM_THM_MOVW_ABS_NC:
8971 case R_ARM_THM_MOVT_ABS:
8972 case R_ARM_THM_MOVW_PREL_NC:
8973 case R_ARM_THM_MOVT_PREL:
8974 /* Should the interworking branches be here also? */
8975
8976 if (h != NULL)
8977 {
8978 struct elf32_arm_link_hash_entry *eh;
8979 struct elf32_arm_relocs_copied **pp;
8980 struct elf32_arm_relocs_copied *p;
8981
8982 eh = (struct elf32_arm_link_hash_entry *) h;
8983
8984 if (h->plt.refcount > 0)
8985 {
8986 h->plt.refcount -= 1;
8987 if (r_type == R_ARM_THM_CALL)
8988 eh->plt_maybe_thumb_refcount--;
8989
8990 if (r_type == R_ARM_THM_JUMP24
8991 || r_type == R_ARM_THM_JUMP19)
8992 eh->plt_thumb_refcount--;
8993 }
8994
8995 if (r_type == R_ARM_ABS32
8996 || r_type == R_ARM_REL32
8997 || r_type == R_ARM_ABS32_NOI
8998 || r_type == R_ARM_REL32_NOI)
8999 {
9000 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
9001 pp = &p->next)
9002 if (p->section == sec)
9003 {
9004 p->count -= 1;
9005 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
9006 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
9007 p->pc_count -= 1;
9008 if (p->count == 0)
9009 *pp = p->next;
9010 break;
9011 }
9012 }
9013 }
9014 break;
9015
9016 default:
9017 break;
9018 }
9019 }
9020
9021 return TRUE;
9022 }
9023
9024 /* Look through the relocs for a section during the first phase. */
9025
9026 static bfd_boolean
9027 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
9028 asection *sec, const Elf_Internal_Rela *relocs)
9029 {
9030 Elf_Internal_Shdr *symtab_hdr;
9031 struct elf_link_hash_entry **sym_hashes;
9032 const Elf_Internal_Rela *rel;
9033 const Elf_Internal_Rela *rel_end;
9034 bfd *dynobj;
9035 asection *sreloc;
9036 bfd_vma *local_got_offsets;
9037 struct elf32_arm_link_hash_table *htab;
9038 bfd_boolean needs_plt;
9039
9040 if (info->relocatable)
9041 return TRUE;
9042
9043 BFD_ASSERT (is_arm_elf (abfd));
9044
9045 htab = elf32_arm_hash_table (info);
9046 sreloc = NULL;
9047
9048 /* Create dynamic sections for relocatable executables so that we can
9049 copy relocations. */
9050 if (htab->root.is_relocatable_executable
9051 && ! htab->root.dynamic_sections_created)
9052 {
9053 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
9054 return FALSE;
9055 }
9056
9057 dynobj = elf_hash_table (info)->dynobj;
9058 local_got_offsets = elf_local_got_offsets (abfd);
9059
9060 symtab_hdr = & elf_symtab_hdr (abfd);
9061 sym_hashes = elf_sym_hashes (abfd);
9062
9063 rel_end = relocs + sec->reloc_count;
9064 for (rel = relocs; rel < rel_end; rel++)
9065 {
9066 struct elf_link_hash_entry *h;
9067 struct elf32_arm_link_hash_entry *eh;
9068 unsigned long r_symndx;
9069 int r_type;
9070
9071 r_symndx = ELF32_R_SYM (rel->r_info);
9072 r_type = ELF32_R_TYPE (rel->r_info);
9073 r_type = arm_real_reloc_type (htab, r_type);
9074
9075 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
9076 {
9077 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
9078 r_symndx);
9079 return FALSE;
9080 }
9081
9082 if (r_symndx < symtab_hdr->sh_info)
9083 h = NULL;
9084 else
9085 {
9086 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9087 while (h->root.type == bfd_link_hash_indirect
9088 || h->root.type == bfd_link_hash_warning)
9089 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9090 }
9091
9092 eh = (struct elf32_arm_link_hash_entry *) h;
9093
9094 switch (r_type)
9095 {
9096 case R_ARM_GOT32:
9097 case R_ARM_GOT_PREL:
9098 case R_ARM_TLS_GD32:
9099 case R_ARM_TLS_IE32:
9100 /* This symbol requires a global offset table entry. */
9101 {
9102 int tls_type, old_tls_type;
9103
9104 switch (r_type)
9105 {
9106 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
9107 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
9108 default: tls_type = GOT_NORMAL; break;
9109 }
9110
9111 if (h != NULL)
9112 {
9113 h->got.refcount++;
9114 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
9115 }
9116 else
9117 {
9118 bfd_signed_vma *local_got_refcounts;
9119
9120 /* This is a global offset table entry for a local symbol. */
9121 local_got_refcounts = elf_local_got_refcounts (abfd);
9122 if (local_got_refcounts == NULL)
9123 {
9124 bfd_size_type size;
9125
9126 size = symtab_hdr->sh_info;
9127 size *= (sizeof (bfd_signed_vma) + sizeof (char));
9128 local_got_refcounts = bfd_zalloc (abfd, size);
9129 if (local_got_refcounts == NULL)
9130 return FALSE;
9131 elf_local_got_refcounts (abfd) = local_got_refcounts;
9132 elf32_arm_local_got_tls_type (abfd)
9133 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
9134 }
9135 local_got_refcounts[r_symndx] += 1;
9136 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
9137 }
9138
9139 /* We will already have issued an error message if there is a
9140 TLS / non-TLS mismatch, based on the symbol type. We don't
9141 support any linker relaxations. So just combine any TLS
9142 types needed. */
9143 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
9144 && tls_type != GOT_NORMAL)
9145 tls_type |= old_tls_type;
9146
9147 if (old_tls_type != tls_type)
9148 {
9149 if (h != NULL)
9150 elf32_arm_hash_entry (h)->tls_type = tls_type;
9151 else
9152 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
9153 }
9154 }
9155 /* Fall through. */
9156
9157 case R_ARM_TLS_LDM32:
9158 if (r_type == R_ARM_TLS_LDM32)
9159 htab->tls_ldm_got.refcount++;
9160 /* Fall through. */
9161
9162 case R_ARM_GOTOFF32:
9163 case R_ARM_GOTPC:
9164 if (htab->sgot == NULL)
9165 {
9166 if (htab->root.dynobj == NULL)
9167 htab->root.dynobj = abfd;
9168 if (!create_got_section (htab->root.dynobj, info))
9169 return FALSE;
9170 }
9171 break;
9172
9173 case R_ARM_ABS12:
9174 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
9175 ldr __GOTT_INDEX__ offsets. */
9176 if (!htab->vxworks_p)
9177 break;
9178 /* Fall through. */
9179
9180 case R_ARM_PC24:
9181 case R_ARM_PLT32:
9182 case R_ARM_CALL:
9183 case R_ARM_JUMP24:
9184 case R_ARM_PREL31:
9185 case R_ARM_THM_CALL:
9186 case R_ARM_THM_JUMP24:
9187 case R_ARM_THM_JUMP19:
9188 needs_plt = 1;
9189 goto normal_reloc;
9190
9191 case R_ARM_ABS32:
9192 case R_ARM_ABS32_NOI:
9193 case R_ARM_REL32:
9194 case R_ARM_REL32_NOI:
9195 case R_ARM_MOVW_ABS_NC:
9196 case R_ARM_MOVT_ABS:
9197 case R_ARM_MOVW_PREL_NC:
9198 case R_ARM_MOVT_PREL:
9199 case R_ARM_THM_MOVW_ABS_NC:
9200 case R_ARM_THM_MOVT_ABS:
9201 case R_ARM_THM_MOVW_PREL_NC:
9202 case R_ARM_THM_MOVT_PREL:
9203 needs_plt = 0;
9204 normal_reloc:
9205
9206 /* Should the interworking branches be listed here? */
9207 if (h != NULL)
9208 {
9209 /* If this reloc is in a read-only section, we might
9210 need a copy reloc. We can't check reliably at this
9211 stage whether the section is read-only, as input
9212 sections have not yet been mapped to output sections.
9213 Tentatively set the flag for now, and correct in
9214 adjust_dynamic_symbol. */
9215 if (!info->shared)
9216 h->non_got_ref = 1;
9217
9218 /* We may need a .plt entry if the function this reloc
9219 refers to is in a different object. We can't tell for
9220 sure yet, because something later might force the
9221 symbol local. */
9222 if (needs_plt)
9223 h->needs_plt = 1;
9224
9225 /* If we create a PLT entry, this relocation will reference
9226 it, even if it's an ABS32 relocation. */
9227 h->plt.refcount += 1;
9228
9229 /* It's too early to use htab->use_blx here, so we have to
9230 record possible blx references separately from
9231 relocs that definitely need a thumb stub. */
9232
9233 if (r_type == R_ARM_THM_CALL)
9234 eh->plt_maybe_thumb_refcount += 1;
9235
9236 if (r_type == R_ARM_THM_JUMP24
9237 || r_type == R_ARM_THM_JUMP19)
9238 eh->plt_thumb_refcount += 1;
9239 }
9240
9241 /* If we are creating a shared library or relocatable executable,
9242 and this is a reloc against a global symbol, or a non PC
9243 relative reloc against a local symbol, then we need to copy
9244 the reloc into the shared library. However, if we are linking
9245 with -Bsymbolic, we do not need to copy a reloc against a
9246 global symbol which is defined in an object we are
9247 including in the link (i.e., DEF_REGULAR is set). At
9248 this point we have not seen all the input files, so it is
9249 possible that DEF_REGULAR is not set now but will be set
9250 later (it is never cleared). We account for that
9251 possibility below by storing information in the
9252 relocs_copied field of the hash table entry. */
9253 if ((info->shared || htab->root.is_relocatable_executable)
9254 && (sec->flags & SEC_ALLOC) != 0
9255 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
9256 || (h != NULL && ! h->needs_plt
9257 && (! info->symbolic || ! h->def_regular))))
9258 {
9259 struct elf32_arm_relocs_copied *p, **head;
9260
9261 /* When creating a shared object, we must copy these
9262 reloc types into the output file. We create a reloc
9263 section in dynobj and make room for this reloc. */
9264 if (sreloc == NULL)
9265 {
9266 sreloc = _bfd_elf_make_dynamic_reloc_section
9267 (sec, dynobj, 2, abfd, ! htab->use_rel);
9268
9269 if (sreloc == NULL)
9270 return FALSE;
9271
9272 /* BPABI objects never have dynamic relocations mapped. */
9273 if (! htab->symbian_p)
9274 {
9275 flagword flags;
9276
9277 flags = bfd_get_section_flags (dynobj, sreloc);
9278 flags &= ~(SEC_LOAD | SEC_ALLOC);
9279 bfd_set_section_flags (dynobj, sreloc, flags);
9280 }
9281 }
9282
9283 /* If this is a global symbol, we count the number of
9284 relocations we need for this symbol. */
9285 if (h != NULL)
9286 {
9287 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
9288 }
9289 else
9290 {
9291 /* Track dynamic relocs needed for local syms too.
9292 We really need local syms available to do this
9293 easily. Oh well. */
9294
9295 asection *s;
9296 void *vpp;
9297
9298 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
9299 sec, r_symndx);
9300 if (s == NULL)
9301 return FALSE;
9302
9303 vpp = &elf_section_data (s)->local_dynrel;
9304 head = (struct elf32_arm_relocs_copied **) vpp;
9305 }
9306
9307 p = *head;
9308 if (p == NULL || p->section != sec)
9309 {
9310 bfd_size_type amt = sizeof *p;
9311
9312 p = bfd_alloc (htab->root.dynobj, amt);
9313 if (p == NULL)
9314 return FALSE;
9315 p->next = *head;
9316 *head = p;
9317 p->section = sec;
9318 p->count = 0;
9319 p->pc_count = 0;
9320 }
9321
9322 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
9323 p->pc_count += 1;
9324 p->count += 1;
9325 }
9326 break;
9327
9328 /* This relocation describes the C++ object vtable hierarchy.
9329 Reconstruct it for later use during GC. */
9330 case R_ARM_GNU_VTINHERIT:
9331 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
9332 return FALSE;
9333 break;
9334
9335 /* This relocation describes which C++ vtable entries are actually
9336 used. Record for later use during GC. */
9337 case R_ARM_GNU_VTENTRY:
9338 BFD_ASSERT (h != NULL);
9339 if (h != NULL
9340 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
9341 return FALSE;
9342 break;
9343 }
9344 }
9345
9346 return TRUE;
9347 }
9348
9349 /* Unwinding tables are not referenced directly. This pass marks them as
9350 required if the corresponding code section is marked. */
9351
9352 static bfd_boolean
9353 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
9354 elf_gc_mark_hook_fn gc_mark_hook)
9355 {
9356 bfd *sub;
9357 Elf_Internal_Shdr **elf_shdrp;
9358 bfd_boolean again;
9359
9360 /* Marking EH data may cause additional code sections to be marked,
9361 requiring multiple passes. */
9362 again = TRUE;
9363 while (again)
9364 {
9365 again = FALSE;
9366 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
9367 {
9368 asection *o;
9369
9370 if (! is_arm_elf (sub))
9371 continue;
9372
9373 elf_shdrp = elf_elfsections (sub);
9374 for (o = sub->sections; o != NULL; o = o->next)
9375 {
9376 Elf_Internal_Shdr *hdr;
9377
9378 hdr = &elf_section_data (o)->this_hdr;
9379 if (hdr->sh_type == SHT_ARM_EXIDX
9380 && hdr->sh_link
9381 && hdr->sh_link < elf_numsections (sub)
9382 && !o->gc_mark
9383 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
9384 {
9385 again = TRUE;
9386 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
9387 return FALSE;
9388 }
9389 }
9390 }
9391 }
9392
9393 return TRUE;
9394 }
9395
9396 /* Treat mapping symbols as special target symbols. */
9397
9398 static bfd_boolean
9399 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
9400 {
9401 return bfd_is_arm_special_symbol_name (sym->name,
9402 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
9403 }
9404
9405 /* This is a copy of elf_find_function() from elf.c except that
9406 ARM mapping symbols are ignored when looking for function names
9407 and STT_ARM_TFUNC is considered to a function type. */
9408
9409 static bfd_boolean
9410 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
9411 asection * section,
9412 asymbol ** symbols,
9413 bfd_vma offset,
9414 const char ** filename_ptr,
9415 const char ** functionname_ptr)
9416 {
9417 const char * filename = NULL;
9418 asymbol * func = NULL;
9419 bfd_vma low_func = 0;
9420 asymbol ** p;
9421
9422 for (p = symbols; *p != NULL; p++)
9423 {
9424 elf_symbol_type *q;
9425
9426 q = (elf_symbol_type *) *p;
9427
9428 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
9429 {
9430 default:
9431 break;
9432 case STT_FILE:
9433 filename = bfd_asymbol_name (&q->symbol);
9434 break;
9435 case STT_FUNC:
9436 case STT_ARM_TFUNC:
9437 case STT_NOTYPE:
9438 /* Skip mapping symbols. */
9439 if ((q->symbol.flags & BSF_LOCAL)
9440 && bfd_is_arm_special_symbol_name (q->symbol.name,
9441 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
9442 continue;
9443 /* Fall through. */
9444 if (bfd_get_section (&q->symbol) == section
9445 && q->symbol.value >= low_func
9446 && q->symbol.value <= offset)
9447 {
9448 func = (asymbol *) q;
9449 low_func = q->symbol.value;
9450 }
9451 break;
9452 }
9453 }
9454
9455 if (func == NULL)
9456 return FALSE;
9457
9458 if (filename_ptr)
9459 *filename_ptr = filename;
9460 if (functionname_ptr)
9461 *functionname_ptr = bfd_asymbol_name (func);
9462
9463 return TRUE;
9464 }
9465
9466
9467 /* Find the nearest line to a particular section and offset, for error
9468 reporting. This code is a duplicate of the code in elf.c, except
9469 that it uses arm_elf_find_function. */
9470
9471 static bfd_boolean
9472 elf32_arm_find_nearest_line (bfd * abfd,
9473 asection * section,
9474 asymbol ** symbols,
9475 bfd_vma offset,
9476 const char ** filename_ptr,
9477 const char ** functionname_ptr,
9478 unsigned int * line_ptr)
9479 {
9480 bfd_boolean found = FALSE;
9481
9482 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
9483
9484 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
9485 filename_ptr, functionname_ptr,
9486 line_ptr, 0,
9487 & elf_tdata (abfd)->dwarf2_find_line_info))
9488 {
9489 if (!*functionname_ptr)
9490 arm_elf_find_function (abfd, section, symbols, offset,
9491 *filename_ptr ? NULL : filename_ptr,
9492 functionname_ptr);
9493
9494 return TRUE;
9495 }
9496
9497 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
9498 & found, filename_ptr,
9499 functionname_ptr, line_ptr,
9500 & elf_tdata (abfd)->line_info))
9501 return FALSE;
9502
9503 if (found && (*functionname_ptr || *line_ptr))
9504 return TRUE;
9505
9506 if (symbols == NULL)
9507 return FALSE;
9508
9509 if (! arm_elf_find_function (abfd, section, symbols, offset,
9510 filename_ptr, functionname_ptr))
9511 return FALSE;
9512
9513 *line_ptr = 0;
9514 return TRUE;
9515 }
9516
9517 static bfd_boolean
9518 elf32_arm_find_inliner_info (bfd * abfd,
9519 const char ** filename_ptr,
9520 const char ** functionname_ptr,
9521 unsigned int * line_ptr)
9522 {
9523 bfd_boolean found;
9524 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
9525 functionname_ptr, line_ptr,
9526 & elf_tdata (abfd)->dwarf2_find_line_info);
9527 return found;
9528 }
9529
9530 /* Adjust a symbol defined by a dynamic object and referenced by a
9531 regular object. The current definition is in some section of the
9532 dynamic object, but we're not including those sections. We have to
9533 change the definition to something the rest of the link can
9534 understand. */
9535
9536 static bfd_boolean
9537 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
9538 struct elf_link_hash_entry * h)
9539 {
9540 bfd * dynobj;
9541 asection * s;
9542 struct elf32_arm_link_hash_entry * eh;
9543 struct elf32_arm_link_hash_table *globals;
9544
9545 globals = elf32_arm_hash_table (info);
9546 dynobj = elf_hash_table (info)->dynobj;
9547
9548 /* Make sure we know what is going on here. */
9549 BFD_ASSERT (dynobj != NULL
9550 && (h->needs_plt
9551 || h->u.weakdef != NULL
9552 || (h->def_dynamic
9553 && h->ref_regular
9554 && !h->def_regular)));
9555
9556 eh = (struct elf32_arm_link_hash_entry *) h;
9557
9558 /* If this is a function, put it in the procedure linkage table. We
9559 will fill in the contents of the procedure linkage table later,
9560 when we know the address of the .got section. */
9561 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
9562 || h->needs_plt)
9563 {
9564 if (h->plt.refcount <= 0
9565 || SYMBOL_CALLS_LOCAL (info, h)
9566 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
9567 && h->root.type == bfd_link_hash_undefweak))
9568 {
9569 /* This case can occur if we saw a PLT32 reloc in an input
9570 file, but the symbol was never referred to by a dynamic
9571 object, or if all references were garbage collected. In
9572 such a case, we don't actually need to build a procedure
9573 linkage table, and we can just do a PC24 reloc instead. */
9574 h->plt.offset = (bfd_vma) -1;
9575 eh->plt_thumb_refcount = 0;
9576 eh->plt_maybe_thumb_refcount = 0;
9577 h->needs_plt = 0;
9578 }
9579
9580 return TRUE;
9581 }
9582 else
9583 {
9584 /* It's possible that we incorrectly decided a .plt reloc was
9585 needed for an R_ARM_PC24 or similar reloc to a non-function sym
9586 in check_relocs. We can't decide accurately between function
9587 and non-function syms in check-relocs; Objects loaded later in
9588 the link may change h->type. So fix it now. */
9589 h->plt.offset = (bfd_vma) -1;
9590 eh->plt_thumb_refcount = 0;
9591 eh->plt_maybe_thumb_refcount = 0;
9592 }
9593
9594 /* If this is a weak symbol, and there is a real definition, the
9595 processor independent code will have arranged for us to see the
9596 real definition first, and we can just use the same value. */
9597 if (h->u.weakdef != NULL)
9598 {
9599 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
9600 || h->u.weakdef->root.type == bfd_link_hash_defweak);
9601 h->root.u.def.section = h->u.weakdef->root.u.def.section;
9602 h->root.u.def.value = h->u.weakdef->root.u.def.value;
9603 return TRUE;
9604 }
9605
9606 /* If there are no non-GOT references, we do not need a copy
9607 relocation. */
9608 if (!h->non_got_ref)
9609 return TRUE;
9610
9611 /* This is a reference to a symbol defined by a dynamic object which
9612 is not a function. */
9613
9614 /* If we are creating a shared library, we must presume that the
9615 only references to the symbol are via the global offset table.
9616 For such cases we need not do anything here; the relocations will
9617 be handled correctly by relocate_section. Relocatable executables
9618 can reference data in shared objects directly, so we don't need to
9619 do anything here. */
9620 if (info->shared || globals->root.is_relocatable_executable)
9621 return TRUE;
9622
9623 if (h->size == 0)
9624 {
9625 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
9626 h->root.root.string);
9627 return TRUE;
9628 }
9629
9630 /* We must allocate the symbol in our .dynbss section, which will
9631 become part of the .bss section of the executable. There will be
9632 an entry for this symbol in the .dynsym section. The dynamic
9633 object will contain position independent code, so all references
9634 from the dynamic object to this symbol will go through the global
9635 offset table. The dynamic linker will use the .dynsym entry to
9636 determine the address it must put in the global offset table, so
9637 both the dynamic object and the regular object will refer to the
9638 same memory location for the variable. */
9639 s = bfd_get_section_by_name (dynobj, ".dynbss");
9640 BFD_ASSERT (s != NULL);
9641
9642 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
9643 copy the initial value out of the dynamic object and into the
9644 runtime process image. We need to remember the offset into the
9645 .rel(a).bss section we are going to use. */
9646 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
9647 {
9648 asection *srel;
9649
9650 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
9651 BFD_ASSERT (srel != NULL);
9652 srel->size += RELOC_SIZE (globals);
9653 h->needs_copy = 1;
9654 }
9655
9656 return _bfd_elf_adjust_dynamic_copy (h, s);
9657 }
9658
9659 /* Allocate space in .plt, .got and associated reloc sections for
9660 dynamic relocs. */
9661
9662 static bfd_boolean
9663 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
9664 {
9665 struct bfd_link_info *info;
9666 struct elf32_arm_link_hash_table *htab;
9667 struct elf32_arm_link_hash_entry *eh;
9668 struct elf32_arm_relocs_copied *p;
9669 bfd_signed_vma thumb_refs;
9670
9671 eh = (struct elf32_arm_link_hash_entry *) h;
9672
9673 if (h->root.type == bfd_link_hash_indirect)
9674 return TRUE;
9675
9676 if (h->root.type == bfd_link_hash_warning)
9677 /* When warning symbols are created, they **replace** the "real"
9678 entry in the hash table, thus we never get to see the real
9679 symbol in a hash traversal. So look at it now. */
9680 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9681
9682 info = (struct bfd_link_info *) inf;
9683 htab = elf32_arm_hash_table (info);
9684
9685 if (htab->root.dynamic_sections_created
9686 && h->plt.refcount > 0)
9687 {
9688 /* Make sure this symbol is output as a dynamic symbol.
9689 Undefined weak syms won't yet be marked as dynamic. */
9690 if (h->dynindx == -1
9691 && !h->forced_local)
9692 {
9693 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9694 return FALSE;
9695 }
9696
9697 if (info->shared
9698 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
9699 {
9700 asection *s = htab->splt;
9701
9702 /* If this is the first .plt entry, make room for the special
9703 first entry. */
9704 if (s->size == 0)
9705 s->size += htab->plt_header_size;
9706
9707 h->plt.offset = s->size;
9708
9709 /* If we will insert a Thumb trampoline before this PLT, leave room
9710 for it. */
9711 thumb_refs = eh->plt_thumb_refcount;
9712 if (!htab->use_blx)
9713 thumb_refs += eh->plt_maybe_thumb_refcount;
9714
9715 if (thumb_refs > 0)
9716 {
9717 h->plt.offset += PLT_THUMB_STUB_SIZE;
9718 s->size += PLT_THUMB_STUB_SIZE;
9719 }
9720
9721 /* If this symbol is not defined in a regular file, and we are
9722 not generating a shared library, then set the symbol to this
9723 location in the .plt. This is required to make function
9724 pointers compare as equal between the normal executable and
9725 the shared library. */
9726 if (! info->shared
9727 && !h->def_regular)
9728 {
9729 h->root.u.def.section = s;
9730 h->root.u.def.value = h->plt.offset;
9731
9732 /* Make sure the function is not marked as Thumb, in case
9733 it is the target of an ABS32 relocation, which will
9734 point to the PLT entry. */
9735 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
9736 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
9737 }
9738
9739 /* Make room for this entry. */
9740 s->size += htab->plt_entry_size;
9741
9742 if (!htab->symbian_p)
9743 {
9744 /* We also need to make an entry in the .got.plt section, which
9745 will be placed in the .got section by the linker script. */
9746 eh->plt_got_offset = htab->sgotplt->size;
9747 htab->sgotplt->size += 4;
9748 }
9749
9750 /* We also need to make an entry in the .rel(a).plt section. */
9751 htab->srelplt->size += RELOC_SIZE (htab);
9752
9753 /* VxWorks executables have a second set of relocations for
9754 each PLT entry. They go in a separate relocation section,
9755 which is processed by the kernel loader. */
9756 if (htab->vxworks_p && !info->shared)
9757 {
9758 /* There is a relocation for the initial PLT entry:
9759 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
9760 if (h->plt.offset == htab->plt_header_size)
9761 htab->srelplt2->size += RELOC_SIZE (htab);
9762
9763 /* There are two extra relocations for each subsequent
9764 PLT entry: an R_ARM_32 relocation for the GOT entry,
9765 and an R_ARM_32 relocation for the PLT entry. */
9766 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
9767 }
9768 }
9769 else
9770 {
9771 h->plt.offset = (bfd_vma) -1;
9772 h->needs_plt = 0;
9773 }
9774 }
9775 else
9776 {
9777 h->plt.offset = (bfd_vma) -1;
9778 h->needs_plt = 0;
9779 }
9780
9781 if (h->got.refcount > 0)
9782 {
9783 asection *s;
9784 bfd_boolean dyn;
9785 int tls_type = elf32_arm_hash_entry (h)->tls_type;
9786 int indx;
9787
9788 /* Make sure this symbol is output as a dynamic symbol.
9789 Undefined weak syms won't yet be marked as dynamic. */
9790 if (h->dynindx == -1
9791 && !h->forced_local)
9792 {
9793 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9794 return FALSE;
9795 }
9796
9797 if (!htab->symbian_p)
9798 {
9799 s = htab->sgot;
9800 h->got.offset = s->size;
9801
9802 if (tls_type == GOT_UNKNOWN)
9803 abort ();
9804
9805 if (tls_type == GOT_NORMAL)
9806 /* Non-TLS symbols need one GOT slot. */
9807 s->size += 4;
9808 else
9809 {
9810 if (tls_type & GOT_TLS_GD)
9811 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
9812 s->size += 8;
9813 if (tls_type & GOT_TLS_IE)
9814 /* R_ARM_TLS_IE32 needs one GOT slot. */
9815 s->size += 4;
9816 }
9817
9818 dyn = htab->root.dynamic_sections_created;
9819
9820 indx = 0;
9821 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
9822 && (!info->shared
9823 || !SYMBOL_REFERENCES_LOCAL (info, h)))
9824 indx = h->dynindx;
9825
9826 if (tls_type != GOT_NORMAL
9827 && (info->shared || indx != 0)
9828 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9829 || h->root.type != bfd_link_hash_undefweak))
9830 {
9831 if (tls_type & GOT_TLS_IE)
9832 htab->srelgot->size += RELOC_SIZE (htab);
9833
9834 if (tls_type & GOT_TLS_GD)
9835 htab->srelgot->size += RELOC_SIZE (htab);
9836
9837 if ((tls_type & GOT_TLS_GD) && indx != 0)
9838 htab->srelgot->size += RELOC_SIZE (htab);
9839 }
9840 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9841 || h->root.type != bfd_link_hash_undefweak)
9842 && (info->shared
9843 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
9844 htab->srelgot->size += RELOC_SIZE (htab);
9845 }
9846 }
9847 else
9848 h->got.offset = (bfd_vma) -1;
9849
9850 /* Allocate stubs for exported Thumb functions on v4t. */
9851 if (!htab->use_blx && h->dynindx != -1
9852 && h->def_regular
9853 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
9854 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9855 {
9856 struct elf_link_hash_entry * th;
9857 struct bfd_link_hash_entry * bh;
9858 struct elf_link_hash_entry * myh;
9859 char name[1024];
9860 asection *s;
9861 bh = NULL;
9862 /* Create a new symbol to regist the real location of the function. */
9863 s = h->root.u.def.section;
9864 sprintf (name, "__real_%s", h->root.root.string);
9865 _bfd_generic_link_add_one_symbol (info, s->owner,
9866 name, BSF_GLOBAL, s,
9867 h->root.u.def.value,
9868 NULL, TRUE, FALSE, &bh);
9869
9870 myh = (struct elf_link_hash_entry *) bh;
9871 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
9872 myh->forced_local = 1;
9873 eh->export_glue = myh;
9874 th = record_arm_to_thumb_glue (info, h);
9875 /* Point the symbol at the stub. */
9876 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
9877 h->root.u.def.section = th->root.u.def.section;
9878 h->root.u.def.value = th->root.u.def.value & ~1;
9879 }
9880
9881 if (eh->relocs_copied == NULL)
9882 return TRUE;
9883
9884 /* In the shared -Bsymbolic case, discard space allocated for
9885 dynamic pc-relative relocs against symbols which turn out to be
9886 defined in regular objects. For the normal shared case, discard
9887 space for pc-relative relocs that have become local due to symbol
9888 visibility changes. */
9889
9890 if (info->shared || htab->root.is_relocatable_executable)
9891 {
9892 /* The only relocs that use pc_count are R_ARM_REL32 and
9893 R_ARM_REL32_NOI, which will appear on something like
9894 ".long foo - .". We want calls to protected symbols to resolve
9895 directly to the function rather than going via the plt. If people
9896 want function pointer comparisons to work as expected then they
9897 should avoid writing assembly like ".long foo - .". */
9898 if (SYMBOL_CALLS_LOCAL (info, h))
9899 {
9900 struct elf32_arm_relocs_copied **pp;
9901
9902 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
9903 {
9904 p->count -= p->pc_count;
9905 p->pc_count = 0;
9906 if (p->count == 0)
9907 *pp = p->next;
9908 else
9909 pp = &p->next;
9910 }
9911 }
9912
9913 if (elf32_arm_hash_table (info)->vxworks_p)
9914 {
9915 struct elf32_arm_relocs_copied **pp;
9916
9917 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
9918 {
9919 if (strcmp (p->section->output_section->name, ".tls_vars") == 0)
9920 *pp = p->next;
9921 else
9922 pp = &p->next;
9923 }
9924 }
9925
9926 /* Also discard relocs on undefined weak syms with non-default
9927 visibility. */
9928 if (eh->relocs_copied != NULL
9929 && h->root.type == bfd_link_hash_undefweak)
9930 {
9931 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9932 eh->relocs_copied = NULL;
9933
9934 /* Make sure undefined weak symbols are output as a dynamic
9935 symbol in PIEs. */
9936 else if (h->dynindx == -1
9937 && !h->forced_local)
9938 {
9939 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9940 return FALSE;
9941 }
9942 }
9943
9944 else if (htab->root.is_relocatable_executable && h->dynindx == -1
9945 && h->root.type == bfd_link_hash_new)
9946 {
9947 /* Output absolute symbols so that we can create relocations
9948 against them. For normal symbols we output a relocation
9949 against the section that contains them. */
9950 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9951 return FALSE;
9952 }
9953
9954 }
9955 else
9956 {
9957 /* For the non-shared case, discard space for relocs against
9958 symbols which turn out to need copy relocs or are not
9959 dynamic. */
9960
9961 if (!h->non_got_ref
9962 && ((h->def_dynamic
9963 && !h->def_regular)
9964 || (htab->root.dynamic_sections_created
9965 && (h->root.type == bfd_link_hash_undefweak
9966 || h->root.type == bfd_link_hash_undefined))))
9967 {
9968 /* Make sure this symbol is output as a dynamic symbol.
9969 Undefined weak syms won't yet be marked as dynamic. */
9970 if (h->dynindx == -1
9971 && !h->forced_local)
9972 {
9973 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9974 return FALSE;
9975 }
9976
9977 /* If that succeeded, we know we'll be keeping all the
9978 relocs. */
9979 if (h->dynindx != -1)
9980 goto keep;
9981 }
9982
9983 eh->relocs_copied = NULL;
9984
9985 keep: ;
9986 }
9987
9988 /* Finally, allocate space. */
9989 for (p = eh->relocs_copied; p != NULL; p = p->next)
9990 {
9991 asection *sreloc = elf_section_data (p->section)->sreloc;
9992 sreloc->size += p->count * RELOC_SIZE (htab);
9993 }
9994
9995 return TRUE;
9996 }
9997
9998 /* Find any dynamic relocs that apply to read-only sections. */
9999
10000 static bfd_boolean
10001 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
10002 {
10003 struct elf32_arm_link_hash_entry * eh;
10004 struct elf32_arm_relocs_copied * p;
10005
10006 if (h->root.type == bfd_link_hash_warning)
10007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10008
10009 eh = (struct elf32_arm_link_hash_entry *) h;
10010 for (p = eh->relocs_copied; p != NULL; p = p->next)
10011 {
10012 asection *s = p->section;
10013
10014 if (s != NULL && (s->flags & SEC_READONLY) != 0)
10015 {
10016 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10017
10018 info->flags |= DF_TEXTREL;
10019
10020 /* Not an error, just cut short the traversal. */
10021 return FALSE;
10022 }
10023 }
10024 return TRUE;
10025 }
10026
10027 void
10028 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
10029 int byteswap_code)
10030 {
10031 struct elf32_arm_link_hash_table *globals;
10032
10033 globals = elf32_arm_hash_table (info);
10034 globals->byteswap_code = byteswap_code;
10035 }
10036
10037 /* Set the sizes of the dynamic sections. */
10038
10039 static bfd_boolean
10040 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
10041 struct bfd_link_info * info)
10042 {
10043 bfd * dynobj;
10044 asection * s;
10045 bfd_boolean plt;
10046 bfd_boolean relocs;
10047 bfd *ibfd;
10048 struct elf32_arm_link_hash_table *htab;
10049
10050 htab = elf32_arm_hash_table (info);
10051 dynobj = elf_hash_table (info)->dynobj;
10052 BFD_ASSERT (dynobj != NULL);
10053 check_use_blx (htab);
10054
10055 if (elf_hash_table (info)->dynamic_sections_created)
10056 {
10057 /* Set the contents of the .interp section to the interpreter. */
10058 if (info->executable)
10059 {
10060 s = bfd_get_section_by_name (dynobj, ".interp");
10061 BFD_ASSERT (s != NULL);
10062 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10063 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10064 }
10065 }
10066
10067 /* Set up .got offsets for local syms, and space for local dynamic
10068 relocs. */
10069 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10070 {
10071 bfd_signed_vma *local_got;
10072 bfd_signed_vma *end_local_got;
10073 char *local_tls_type;
10074 bfd_size_type locsymcount;
10075 Elf_Internal_Shdr *symtab_hdr;
10076 asection *srel;
10077 bfd_boolean is_vxworks = elf32_arm_hash_table (info)->vxworks_p;
10078
10079 if (! is_arm_elf (ibfd))
10080 continue;
10081
10082 for (s = ibfd->sections; s != NULL; s = s->next)
10083 {
10084 struct elf32_arm_relocs_copied *p;
10085
10086 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10087 {
10088 if (!bfd_is_abs_section (p->section)
10089 && bfd_is_abs_section (p->section->output_section))
10090 {
10091 /* Input section has been discarded, either because
10092 it is a copy of a linkonce section or due to
10093 linker script /DISCARD/, so we'll be discarding
10094 the relocs too. */
10095 }
10096 else if (is_vxworks
10097 && strcmp (p->section->output_section->name,
10098 ".tls_vars") == 0)
10099 {
10100 /* Relocations in vxworks .tls_vars sections are
10101 handled specially by the loader. */
10102 }
10103 else if (p->count != 0)
10104 {
10105 srel = elf_section_data (p->section)->sreloc;
10106 srel->size += p->count * RELOC_SIZE (htab);
10107 if ((p->section->output_section->flags & SEC_READONLY) != 0)
10108 info->flags |= DF_TEXTREL;
10109 }
10110 }
10111 }
10112
10113 local_got = elf_local_got_refcounts (ibfd);
10114 if (!local_got)
10115 continue;
10116
10117 symtab_hdr = & elf_symtab_hdr (ibfd);
10118 locsymcount = symtab_hdr->sh_info;
10119 end_local_got = local_got + locsymcount;
10120 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
10121 s = htab->sgot;
10122 srel = htab->srelgot;
10123 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
10124 {
10125 if (*local_got > 0)
10126 {
10127 *local_got = s->size;
10128 if (*local_tls_type & GOT_TLS_GD)
10129 /* TLS_GD relocs need an 8-byte structure in the GOT. */
10130 s->size += 8;
10131 if (*local_tls_type & GOT_TLS_IE)
10132 s->size += 4;
10133 if (*local_tls_type == GOT_NORMAL)
10134 s->size += 4;
10135
10136 if (info->shared || *local_tls_type == GOT_TLS_GD)
10137 srel->size += RELOC_SIZE (htab);
10138 }
10139 else
10140 *local_got = (bfd_vma) -1;
10141 }
10142 }
10143
10144 if (htab->tls_ldm_got.refcount > 0)
10145 {
10146 /* Allocate two GOT entries and one dynamic relocation (if necessary)
10147 for R_ARM_TLS_LDM32 relocations. */
10148 htab->tls_ldm_got.offset = htab->sgot->size;
10149 htab->sgot->size += 8;
10150 if (info->shared)
10151 htab->srelgot->size += RELOC_SIZE (htab);
10152 }
10153 else
10154 htab->tls_ldm_got.offset = -1;
10155
10156 /* Allocate global sym .plt and .got entries, and space for global
10157 sym dynamic relocs. */
10158 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
10159
10160 /* Here we rummage through the found bfds to collect glue information. */
10161 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10162 {
10163 if (! is_arm_elf (ibfd))
10164 continue;
10165
10166 /* Initialise mapping tables for code/data. */
10167 bfd_elf32_arm_init_maps (ibfd);
10168
10169 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
10170 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
10171 /* xgettext:c-format */
10172 _bfd_error_handler (_("Errors encountered processing file %s"),
10173 ibfd->filename);
10174 }
10175
10176 /* The check_relocs and adjust_dynamic_symbol entry points have
10177 determined the sizes of the various dynamic sections. Allocate
10178 memory for them. */
10179 plt = FALSE;
10180 relocs = FALSE;
10181 for (s = dynobj->sections; s != NULL; s = s->next)
10182 {
10183 const char * name;
10184
10185 if ((s->flags & SEC_LINKER_CREATED) == 0)
10186 continue;
10187
10188 /* It's OK to base decisions on the section name, because none
10189 of the dynobj section names depend upon the input files. */
10190 name = bfd_get_section_name (dynobj, s);
10191
10192 if (strcmp (name, ".plt") == 0)
10193 {
10194 /* Remember whether there is a PLT. */
10195 plt = s->size != 0;
10196 }
10197 else if (CONST_STRNEQ (name, ".rel"))
10198 {
10199 if (s->size != 0)
10200 {
10201 /* Remember whether there are any reloc sections other
10202 than .rel(a).plt and .rela.plt.unloaded. */
10203 if (s != htab->srelplt && s != htab->srelplt2)
10204 relocs = TRUE;
10205
10206 /* We use the reloc_count field as a counter if we need
10207 to copy relocs into the output file. */
10208 s->reloc_count = 0;
10209 }
10210 }
10211 else if (! CONST_STRNEQ (name, ".got")
10212 && strcmp (name, ".dynbss") != 0)
10213 {
10214 /* It's not one of our sections, so don't allocate space. */
10215 continue;
10216 }
10217
10218 if (s->size == 0)
10219 {
10220 /* If we don't need this section, strip it from the
10221 output file. This is mostly to handle .rel(a).bss and
10222 .rel(a).plt. We must create both sections in
10223 create_dynamic_sections, because they must be created
10224 before the linker maps input sections to output
10225 sections. The linker does that before
10226 adjust_dynamic_symbol is called, and it is that
10227 function which decides whether anything needs to go
10228 into these sections. */
10229 s->flags |= SEC_EXCLUDE;
10230 continue;
10231 }
10232
10233 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10234 continue;
10235
10236 /* Allocate memory for the section contents. */
10237 s->contents = bfd_zalloc (dynobj, s->size);
10238 if (s->contents == NULL)
10239 return FALSE;
10240 }
10241
10242 if (elf_hash_table (info)->dynamic_sections_created)
10243 {
10244 /* Add some entries to the .dynamic section. We fill in the
10245 values later, in elf32_arm_finish_dynamic_sections, but we
10246 must add the entries now so that we get the correct size for
10247 the .dynamic section. The DT_DEBUG entry is filled in by the
10248 dynamic linker and used by the debugger. */
10249 #define add_dynamic_entry(TAG, VAL) \
10250 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10251
10252 if (info->executable)
10253 {
10254 if (!add_dynamic_entry (DT_DEBUG, 0))
10255 return FALSE;
10256 }
10257
10258 if (plt)
10259 {
10260 if ( !add_dynamic_entry (DT_PLTGOT, 0)
10261 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10262 || !add_dynamic_entry (DT_PLTREL,
10263 htab->use_rel ? DT_REL : DT_RELA)
10264 || !add_dynamic_entry (DT_JMPREL, 0))
10265 return FALSE;
10266 }
10267
10268 if (relocs)
10269 {
10270 if (htab->use_rel)
10271 {
10272 if (!add_dynamic_entry (DT_REL, 0)
10273 || !add_dynamic_entry (DT_RELSZ, 0)
10274 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
10275 return FALSE;
10276 }
10277 else
10278 {
10279 if (!add_dynamic_entry (DT_RELA, 0)
10280 || !add_dynamic_entry (DT_RELASZ, 0)
10281 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
10282 return FALSE;
10283 }
10284 }
10285
10286 /* If any dynamic relocs apply to a read-only section,
10287 then we need a DT_TEXTREL entry. */
10288 if ((info->flags & DF_TEXTREL) == 0)
10289 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
10290 info);
10291
10292 if ((info->flags & DF_TEXTREL) != 0)
10293 {
10294 if (!add_dynamic_entry (DT_TEXTREL, 0))
10295 return FALSE;
10296 }
10297 if (htab->vxworks_p
10298 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
10299 return FALSE;
10300 }
10301 #undef add_dynamic_entry
10302
10303 return TRUE;
10304 }
10305
10306 /* Finish up dynamic symbol handling. We set the contents of various
10307 dynamic sections here. */
10308
10309 static bfd_boolean
10310 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
10311 struct bfd_link_info * info,
10312 struct elf_link_hash_entry * h,
10313 Elf_Internal_Sym * sym)
10314 {
10315 bfd * dynobj;
10316 struct elf32_arm_link_hash_table *htab;
10317 struct elf32_arm_link_hash_entry *eh;
10318
10319 dynobj = elf_hash_table (info)->dynobj;
10320 htab = elf32_arm_hash_table (info);
10321 eh = (struct elf32_arm_link_hash_entry *) h;
10322
10323 if (h->plt.offset != (bfd_vma) -1)
10324 {
10325 asection * splt;
10326 asection * srel;
10327 bfd_byte *loc;
10328 bfd_vma plt_index;
10329 Elf_Internal_Rela rel;
10330
10331 /* This symbol has an entry in the procedure linkage table. Set
10332 it up. */
10333
10334 BFD_ASSERT (h->dynindx != -1);
10335
10336 splt = bfd_get_section_by_name (dynobj, ".plt");
10337 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
10338 BFD_ASSERT (splt != NULL && srel != NULL);
10339
10340 /* Fill in the entry in the procedure linkage table. */
10341 if (htab->symbian_p)
10342 {
10343 put_arm_insn (htab, output_bfd,
10344 elf32_arm_symbian_plt_entry[0],
10345 splt->contents + h->plt.offset);
10346 bfd_put_32 (output_bfd,
10347 elf32_arm_symbian_plt_entry[1],
10348 splt->contents + h->plt.offset + 4);
10349
10350 /* Fill in the entry in the .rel.plt section. */
10351 rel.r_offset = (splt->output_section->vma
10352 + splt->output_offset
10353 + h->plt.offset + 4);
10354 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10355
10356 /* Get the index in the procedure linkage table which
10357 corresponds to this symbol. This is the index of this symbol
10358 in all the symbols for which we are making plt entries. The
10359 first entry in the procedure linkage table is reserved. */
10360 plt_index = ((h->plt.offset - htab->plt_header_size)
10361 / htab->plt_entry_size);
10362 }
10363 else
10364 {
10365 bfd_vma got_offset, got_address, plt_address;
10366 bfd_vma got_displacement;
10367 asection * sgot;
10368 bfd_byte * ptr;
10369
10370 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
10371 BFD_ASSERT (sgot != NULL);
10372
10373 /* Get the offset into the .got.plt table of the entry that
10374 corresponds to this function. */
10375 got_offset = eh->plt_got_offset;
10376
10377 /* Get the index in the procedure linkage table which
10378 corresponds to this symbol. This is the index of this symbol
10379 in all the symbols for which we are making plt entries. The
10380 first three entries in .got.plt are reserved; after that
10381 symbols appear in the same order as in .plt. */
10382 plt_index = (got_offset - 12) / 4;
10383
10384 /* Calculate the address of the GOT entry. */
10385 got_address = (sgot->output_section->vma
10386 + sgot->output_offset
10387 + got_offset);
10388
10389 /* ...and the address of the PLT entry. */
10390 plt_address = (splt->output_section->vma
10391 + splt->output_offset
10392 + h->plt.offset);
10393
10394 ptr = htab->splt->contents + h->plt.offset;
10395 if (htab->vxworks_p && info->shared)
10396 {
10397 unsigned int i;
10398 bfd_vma val;
10399
10400 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
10401 {
10402 val = elf32_arm_vxworks_shared_plt_entry[i];
10403 if (i == 2)
10404 val |= got_address - sgot->output_section->vma;
10405 if (i == 5)
10406 val |= plt_index * RELOC_SIZE (htab);
10407 if (i == 2 || i == 5)
10408 bfd_put_32 (output_bfd, val, ptr);
10409 else
10410 put_arm_insn (htab, output_bfd, val, ptr);
10411 }
10412 }
10413 else if (htab->vxworks_p)
10414 {
10415 unsigned int i;
10416 bfd_vma val;
10417
10418 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
10419 {
10420 val = elf32_arm_vxworks_exec_plt_entry[i];
10421 if (i == 2)
10422 val |= got_address;
10423 if (i == 4)
10424 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
10425 if (i == 5)
10426 val |= plt_index * RELOC_SIZE (htab);
10427 if (i == 2 || i == 5)
10428 bfd_put_32 (output_bfd, val, ptr);
10429 else
10430 put_arm_insn (htab, output_bfd, val, ptr);
10431 }
10432
10433 loc = (htab->srelplt2->contents
10434 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
10435
10436 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
10437 referencing the GOT for this PLT entry. */
10438 rel.r_offset = plt_address + 8;
10439 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10440 rel.r_addend = got_offset;
10441 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10442 loc += RELOC_SIZE (htab);
10443
10444 /* Create the R_ARM_ABS32 relocation referencing the
10445 beginning of the PLT for this GOT entry. */
10446 rel.r_offset = got_address;
10447 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
10448 rel.r_addend = 0;
10449 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10450 }
10451 else
10452 {
10453 bfd_signed_vma thumb_refs;
10454 /* Calculate the displacement between the PLT slot and the
10455 entry in the GOT. The eight-byte offset accounts for the
10456 value produced by adding to pc in the first instruction
10457 of the PLT stub. */
10458 got_displacement = got_address - (plt_address + 8);
10459
10460 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
10461
10462 thumb_refs = eh->plt_thumb_refcount;
10463 if (!htab->use_blx)
10464 thumb_refs += eh->plt_maybe_thumb_refcount;
10465
10466 if (thumb_refs > 0)
10467 {
10468 put_thumb_insn (htab, output_bfd,
10469 elf32_arm_plt_thumb_stub[0], ptr - 4);
10470 put_thumb_insn (htab, output_bfd,
10471 elf32_arm_plt_thumb_stub[1], ptr - 2);
10472 }
10473
10474 put_arm_insn (htab, output_bfd,
10475 elf32_arm_plt_entry[0]
10476 | ((got_displacement & 0x0ff00000) >> 20),
10477 ptr + 0);
10478 put_arm_insn (htab, output_bfd,
10479 elf32_arm_plt_entry[1]
10480 | ((got_displacement & 0x000ff000) >> 12),
10481 ptr+ 4);
10482 put_arm_insn (htab, output_bfd,
10483 elf32_arm_plt_entry[2]
10484 | (got_displacement & 0x00000fff),
10485 ptr + 8);
10486 #ifdef FOUR_WORD_PLT
10487 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
10488 #endif
10489 }
10490
10491 /* Fill in the entry in the global offset table. */
10492 bfd_put_32 (output_bfd,
10493 (splt->output_section->vma
10494 + splt->output_offset),
10495 sgot->contents + got_offset);
10496
10497 /* Fill in the entry in the .rel(a).plt section. */
10498 rel.r_addend = 0;
10499 rel.r_offset = got_address;
10500 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
10501 }
10502
10503 loc = srel->contents + plt_index * RELOC_SIZE (htab);
10504 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10505
10506 if (!h->def_regular)
10507 {
10508 /* Mark the symbol as undefined, rather than as defined in
10509 the .plt section. Leave the value alone. */
10510 sym->st_shndx = SHN_UNDEF;
10511 /* If the symbol is weak, we do need to clear the value.
10512 Otherwise, the PLT entry would provide a definition for
10513 the symbol even if the symbol wasn't defined anywhere,
10514 and so the symbol would never be NULL. */
10515 if (!h->ref_regular_nonweak)
10516 sym->st_value = 0;
10517 }
10518 }
10519
10520 if (h->got.offset != (bfd_vma) -1
10521 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
10522 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
10523 {
10524 asection * sgot;
10525 asection * srel;
10526 Elf_Internal_Rela rel;
10527 bfd_byte *loc;
10528 bfd_vma offset;
10529
10530 /* This symbol has an entry in the global offset table. Set it
10531 up. */
10532 sgot = bfd_get_section_by_name (dynobj, ".got");
10533 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
10534 BFD_ASSERT (sgot != NULL && srel != NULL);
10535
10536 offset = (h->got.offset & ~(bfd_vma) 1);
10537 rel.r_addend = 0;
10538 rel.r_offset = (sgot->output_section->vma
10539 + sgot->output_offset
10540 + offset);
10541
10542 /* If this is a static link, or it is a -Bsymbolic link and the
10543 symbol is defined locally or was forced to be local because
10544 of a version file, we just want to emit a RELATIVE reloc.
10545 The entry in the global offset table will already have been
10546 initialized in the relocate_section function. */
10547 if (info->shared
10548 && SYMBOL_REFERENCES_LOCAL (info, h))
10549 {
10550 BFD_ASSERT ((h->got.offset & 1) != 0);
10551 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
10552 if (!htab->use_rel)
10553 {
10554 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
10555 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
10556 }
10557 }
10558 else
10559 {
10560 BFD_ASSERT ((h->got.offset & 1) == 0);
10561 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
10562 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10563 }
10564
10565 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
10566 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10567 }
10568
10569 if (h->needs_copy)
10570 {
10571 asection * s;
10572 Elf_Internal_Rela rel;
10573 bfd_byte *loc;
10574
10575 /* This symbol needs a copy reloc. Set it up. */
10576 BFD_ASSERT (h->dynindx != -1
10577 && (h->root.type == bfd_link_hash_defined
10578 || h->root.type == bfd_link_hash_defweak));
10579
10580 s = bfd_get_section_by_name (h->root.u.def.section->owner,
10581 RELOC_SECTION (htab, ".bss"));
10582 BFD_ASSERT (s != NULL);
10583
10584 rel.r_addend = 0;
10585 rel.r_offset = (h->root.u.def.value
10586 + h->root.u.def.section->output_section->vma
10587 + h->root.u.def.section->output_offset);
10588 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
10589 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
10590 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10591 }
10592
10593 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
10594 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
10595 to the ".got" section. */
10596 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
10597 || (!htab->vxworks_p && h == htab->root.hgot))
10598 sym->st_shndx = SHN_ABS;
10599
10600 return TRUE;
10601 }
10602
10603 /* Finish up the dynamic sections. */
10604
10605 static bfd_boolean
10606 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
10607 {
10608 bfd * dynobj;
10609 asection * sgot;
10610 asection * sdyn;
10611
10612 dynobj = elf_hash_table (info)->dynobj;
10613
10614 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
10615 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
10616 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10617
10618 if (elf_hash_table (info)->dynamic_sections_created)
10619 {
10620 asection *splt;
10621 Elf32_External_Dyn *dyncon, *dynconend;
10622 struct elf32_arm_link_hash_table *htab;
10623
10624 htab = elf32_arm_hash_table (info);
10625 splt = bfd_get_section_by_name (dynobj, ".plt");
10626 BFD_ASSERT (splt != NULL && sdyn != NULL);
10627
10628 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10629 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10630
10631 for (; dyncon < dynconend; dyncon++)
10632 {
10633 Elf_Internal_Dyn dyn;
10634 const char * name;
10635 asection * s;
10636
10637 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10638
10639 switch (dyn.d_tag)
10640 {
10641 unsigned int type;
10642
10643 default:
10644 if (htab->vxworks_p
10645 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10646 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10647 break;
10648
10649 case DT_HASH:
10650 name = ".hash";
10651 goto get_vma_if_bpabi;
10652 case DT_STRTAB:
10653 name = ".dynstr";
10654 goto get_vma_if_bpabi;
10655 case DT_SYMTAB:
10656 name = ".dynsym";
10657 goto get_vma_if_bpabi;
10658 case DT_VERSYM:
10659 name = ".gnu.version";
10660 goto get_vma_if_bpabi;
10661 case DT_VERDEF:
10662 name = ".gnu.version_d";
10663 goto get_vma_if_bpabi;
10664 case DT_VERNEED:
10665 name = ".gnu.version_r";
10666 goto get_vma_if_bpabi;
10667
10668 case DT_PLTGOT:
10669 name = ".got";
10670 goto get_vma;
10671 case DT_JMPREL:
10672 name = RELOC_SECTION (htab, ".plt");
10673 get_vma:
10674 s = bfd_get_section_by_name (output_bfd, name);
10675 BFD_ASSERT (s != NULL);
10676 if (!htab->symbian_p)
10677 dyn.d_un.d_ptr = s->vma;
10678 else
10679 /* In the BPABI, tags in the PT_DYNAMIC section point
10680 at the file offset, not the memory address, for the
10681 convenience of the post linker. */
10682 dyn.d_un.d_ptr = s->filepos;
10683 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10684 break;
10685
10686 get_vma_if_bpabi:
10687 if (htab->symbian_p)
10688 goto get_vma;
10689 break;
10690
10691 case DT_PLTRELSZ:
10692 s = bfd_get_section_by_name (output_bfd,
10693 RELOC_SECTION (htab, ".plt"));
10694 BFD_ASSERT (s != NULL);
10695 dyn.d_un.d_val = s->size;
10696 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10697 break;
10698
10699 case DT_RELSZ:
10700 case DT_RELASZ:
10701 if (!htab->symbian_p)
10702 {
10703 /* My reading of the SVR4 ABI indicates that the
10704 procedure linkage table relocs (DT_JMPREL) should be
10705 included in the overall relocs (DT_REL). This is
10706 what Solaris does. However, UnixWare can not handle
10707 that case. Therefore, we override the DT_RELSZ entry
10708 here to make it not include the JMPREL relocs. Since
10709 the linker script arranges for .rel(a).plt to follow all
10710 other relocation sections, we don't have to worry
10711 about changing the DT_REL entry. */
10712 s = bfd_get_section_by_name (output_bfd,
10713 RELOC_SECTION (htab, ".plt"));
10714 if (s != NULL)
10715 dyn.d_un.d_val -= s->size;
10716 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10717 break;
10718 }
10719 /* Fall through. */
10720
10721 case DT_REL:
10722 case DT_RELA:
10723 /* In the BPABI, the DT_REL tag must point at the file
10724 offset, not the VMA, of the first relocation
10725 section. So, we use code similar to that in
10726 elflink.c, but do not check for SHF_ALLOC on the
10727 relcoation section, since relocations sections are
10728 never allocated under the BPABI. The comments above
10729 about Unixware notwithstanding, we include all of the
10730 relocations here. */
10731 if (htab->symbian_p)
10732 {
10733 unsigned int i;
10734 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
10735 ? SHT_REL : SHT_RELA);
10736 dyn.d_un.d_val = 0;
10737 for (i = 1; i < elf_numsections (output_bfd); i++)
10738 {
10739 Elf_Internal_Shdr *hdr
10740 = elf_elfsections (output_bfd)[i];
10741 if (hdr->sh_type == type)
10742 {
10743 if (dyn.d_tag == DT_RELSZ
10744 || dyn.d_tag == DT_RELASZ)
10745 dyn.d_un.d_val += hdr->sh_size;
10746 else if ((ufile_ptr) hdr->sh_offset
10747 <= dyn.d_un.d_val - 1)
10748 dyn.d_un.d_val = hdr->sh_offset;
10749 }
10750 }
10751 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10752 }
10753 break;
10754
10755 /* Set the bottom bit of DT_INIT/FINI if the
10756 corresponding function is Thumb. */
10757 case DT_INIT:
10758 name = info->init_function;
10759 goto get_sym;
10760 case DT_FINI:
10761 name = info->fini_function;
10762 get_sym:
10763 /* If it wasn't set by elf_bfd_final_link
10764 then there is nothing to adjust. */
10765 if (dyn.d_un.d_val != 0)
10766 {
10767 struct elf_link_hash_entry * eh;
10768
10769 eh = elf_link_hash_lookup (elf_hash_table (info), name,
10770 FALSE, FALSE, TRUE);
10771 if (eh != NULL
10772 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
10773 {
10774 dyn.d_un.d_val |= 1;
10775 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10776 }
10777 }
10778 break;
10779 }
10780 }
10781
10782 /* Fill in the first entry in the procedure linkage table. */
10783 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
10784 {
10785 const bfd_vma *plt0_entry;
10786 bfd_vma got_address, plt_address, got_displacement;
10787
10788 /* Calculate the addresses of the GOT and PLT. */
10789 got_address = sgot->output_section->vma + sgot->output_offset;
10790 plt_address = splt->output_section->vma + splt->output_offset;
10791
10792 if (htab->vxworks_p)
10793 {
10794 /* The VxWorks GOT is relocated by the dynamic linker.
10795 Therefore, we must emit relocations rather than simply
10796 computing the values now. */
10797 Elf_Internal_Rela rel;
10798
10799 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
10800 put_arm_insn (htab, output_bfd, plt0_entry[0],
10801 splt->contents + 0);
10802 put_arm_insn (htab, output_bfd, plt0_entry[1],
10803 splt->contents + 4);
10804 put_arm_insn (htab, output_bfd, plt0_entry[2],
10805 splt->contents + 8);
10806 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
10807
10808 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
10809 rel.r_offset = plt_address + 12;
10810 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10811 rel.r_addend = 0;
10812 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
10813 htab->srelplt2->contents);
10814 }
10815 else
10816 {
10817 got_displacement = got_address - (plt_address + 16);
10818
10819 plt0_entry = elf32_arm_plt0_entry;
10820 put_arm_insn (htab, output_bfd, plt0_entry[0],
10821 splt->contents + 0);
10822 put_arm_insn (htab, output_bfd, plt0_entry[1],
10823 splt->contents + 4);
10824 put_arm_insn (htab, output_bfd, plt0_entry[2],
10825 splt->contents + 8);
10826 put_arm_insn (htab, output_bfd, plt0_entry[3],
10827 splt->contents + 12);
10828
10829 #ifdef FOUR_WORD_PLT
10830 /* The displacement value goes in the otherwise-unused
10831 last word of the second entry. */
10832 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
10833 #else
10834 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
10835 #endif
10836 }
10837 }
10838
10839 /* UnixWare sets the entsize of .plt to 4, although that doesn't
10840 really seem like the right value. */
10841 if (splt->output_section->owner == output_bfd)
10842 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
10843
10844 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
10845 {
10846 /* Correct the .rel(a).plt.unloaded relocations. They will have
10847 incorrect symbol indexes. */
10848 int num_plts;
10849 unsigned char *p;
10850
10851 num_plts = ((htab->splt->size - htab->plt_header_size)
10852 / htab->plt_entry_size);
10853 p = htab->srelplt2->contents + RELOC_SIZE (htab);
10854
10855 for (; num_plts; num_plts--)
10856 {
10857 Elf_Internal_Rela rel;
10858
10859 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
10860 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10861 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
10862 p += RELOC_SIZE (htab);
10863
10864 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
10865 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
10866 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
10867 p += RELOC_SIZE (htab);
10868 }
10869 }
10870 }
10871
10872 /* Fill in the first three entries in the global offset table. */
10873 if (sgot)
10874 {
10875 if (sgot->size > 0)
10876 {
10877 if (sdyn == NULL)
10878 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
10879 else
10880 bfd_put_32 (output_bfd,
10881 sdyn->output_section->vma + sdyn->output_offset,
10882 sgot->contents);
10883 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
10884 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
10885 }
10886
10887 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
10888 }
10889
10890 return TRUE;
10891 }
10892
10893 static void
10894 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
10895 {
10896 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
10897 struct elf32_arm_link_hash_table *globals;
10898
10899 i_ehdrp = elf_elfheader (abfd);
10900
10901 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
10902 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
10903 else
10904 i_ehdrp->e_ident[EI_OSABI] = 0;
10905 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
10906
10907 if (link_info)
10908 {
10909 globals = elf32_arm_hash_table (link_info);
10910 if (globals->byteswap_code)
10911 i_ehdrp->e_flags |= EF_ARM_BE8;
10912 }
10913 }
10914
10915 static enum elf_reloc_type_class
10916 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
10917 {
10918 switch ((int) ELF32_R_TYPE (rela->r_info))
10919 {
10920 case R_ARM_RELATIVE:
10921 return reloc_class_relative;
10922 case R_ARM_JUMP_SLOT:
10923 return reloc_class_plt;
10924 case R_ARM_COPY:
10925 return reloc_class_copy;
10926 default:
10927 return reloc_class_normal;
10928 }
10929 }
10930
10931 /* Set the right machine number for an Arm ELF file. */
10932
10933 static bfd_boolean
10934 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
10935 {
10936 if (hdr->sh_type == SHT_NOTE)
10937 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
10938
10939 return TRUE;
10940 }
10941
10942 static void
10943 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
10944 {
10945 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
10946 }
10947
10948 /* Return TRUE if this is an unwinding table entry. */
10949
10950 static bfd_boolean
10951 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
10952 {
10953 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
10954 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
10955 }
10956
10957
10958 /* Set the type and flags for an ARM section. We do this by
10959 the section name, which is a hack, but ought to work. */
10960
10961 static bfd_boolean
10962 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
10963 {
10964 const char * name;
10965
10966 name = bfd_get_section_name (abfd, sec);
10967
10968 if (is_arm_elf_unwind_section_name (abfd, name))
10969 {
10970 hdr->sh_type = SHT_ARM_EXIDX;
10971 hdr->sh_flags |= SHF_LINK_ORDER;
10972 }
10973 return TRUE;
10974 }
10975
10976 /* Handle an ARM specific section when reading an object file. This is
10977 called when bfd_section_from_shdr finds a section with an unknown
10978 type. */
10979
10980 static bfd_boolean
10981 elf32_arm_section_from_shdr (bfd *abfd,
10982 Elf_Internal_Shdr * hdr,
10983 const char *name,
10984 int shindex)
10985 {
10986 /* There ought to be a place to keep ELF backend specific flags, but
10987 at the moment there isn't one. We just keep track of the
10988 sections by their name, instead. Fortunately, the ABI gives
10989 names for all the ARM specific sections, so we will probably get
10990 away with this. */
10991 switch (hdr->sh_type)
10992 {
10993 case SHT_ARM_EXIDX:
10994 case SHT_ARM_PREEMPTMAP:
10995 case SHT_ARM_ATTRIBUTES:
10996 break;
10997
10998 default:
10999 return FALSE;
11000 }
11001
11002 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
11003 return FALSE;
11004
11005 return TRUE;
11006 }
11007
11008 /* A structure used to record a list of sections, independently
11009 of the next and prev fields in the asection structure. */
11010 typedef struct section_list
11011 {
11012 asection * sec;
11013 struct section_list * next;
11014 struct section_list * prev;
11015 }
11016 section_list;
11017
11018 /* Unfortunately we need to keep a list of sections for which
11019 an _arm_elf_section_data structure has been allocated. This
11020 is because it is possible for functions like elf32_arm_write_section
11021 to be called on a section which has had an elf_data_structure
11022 allocated for it (and so the used_by_bfd field is valid) but
11023 for which the ARM extended version of this structure - the
11024 _arm_elf_section_data structure - has not been allocated. */
11025 static section_list * sections_with_arm_elf_section_data = NULL;
11026
11027 static void
11028 record_section_with_arm_elf_section_data (asection * sec)
11029 {
11030 struct section_list * entry;
11031
11032 entry = bfd_malloc (sizeof (* entry));
11033 if (entry == NULL)
11034 return;
11035 entry->sec = sec;
11036 entry->next = sections_with_arm_elf_section_data;
11037 entry->prev = NULL;
11038 if (entry->next != NULL)
11039 entry->next->prev = entry;
11040 sections_with_arm_elf_section_data = entry;
11041 }
11042
11043 static struct section_list *
11044 find_arm_elf_section_entry (asection * sec)
11045 {
11046 struct section_list * entry;
11047 static struct section_list * last_entry = NULL;
11048
11049 /* This is a short cut for the typical case where the sections are added
11050 to the sections_with_arm_elf_section_data list in forward order and
11051 then looked up here in backwards order. This makes a real difference
11052 to the ld-srec/sec64k.exp linker test. */
11053 entry = sections_with_arm_elf_section_data;
11054 if (last_entry != NULL)
11055 {
11056 if (last_entry->sec == sec)
11057 entry = last_entry;
11058 else if (last_entry->next != NULL
11059 && last_entry->next->sec == sec)
11060 entry = last_entry->next;
11061 }
11062
11063 for (; entry; entry = entry->next)
11064 if (entry->sec == sec)
11065 break;
11066
11067 if (entry)
11068 /* Record the entry prior to this one - it is the entry we are most
11069 likely to want to locate next time. Also this way if we have been
11070 called from unrecord_section_with_arm_elf_section_data() we will not
11071 be caching a pointer that is about to be freed. */
11072 last_entry = entry->prev;
11073
11074 return entry;
11075 }
11076
11077 static _arm_elf_section_data *
11078 get_arm_elf_section_data (asection * sec)
11079 {
11080 struct section_list * entry;
11081
11082 entry = find_arm_elf_section_entry (sec);
11083
11084 if (entry)
11085 return elf32_arm_section_data (entry->sec);
11086 else
11087 return NULL;
11088 }
11089
11090 static void
11091 unrecord_section_with_arm_elf_section_data (asection * sec)
11092 {
11093 struct section_list * entry;
11094
11095 entry = find_arm_elf_section_entry (sec);
11096
11097 if (entry)
11098 {
11099 if (entry->prev != NULL)
11100 entry->prev->next = entry->next;
11101 if (entry->next != NULL)
11102 entry->next->prev = entry->prev;
11103 if (entry == sections_with_arm_elf_section_data)
11104 sections_with_arm_elf_section_data = entry->next;
11105 free (entry);
11106 }
11107 }
11108
11109
11110 typedef struct
11111 {
11112 void *finfo;
11113 struct bfd_link_info *info;
11114 asection *sec;
11115 int sec_shndx;
11116 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
11117 asection *, struct elf_link_hash_entry *);
11118 } output_arch_syminfo;
11119
11120 enum map_symbol_type
11121 {
11122 ARM_MAP_ARM,
11123 ARM_MAP_THUMB,
11124 ARM_MAP_DATA
11125 };
11126
11127
11128 /* Output a single mapping symbol. */
11129
11130 static bfd_boolean
11131 elf32_arm_output_map_sym (output_arch_syminfo *osi,
11132 enum map_symbol_type type,
11133 bfd_vma offset)
11134 {
11135 static const char *names[3] = {"$a", "$t", "$d"};
11136 struct elf32_arm_link_hash_table *htab;
11137 Elf_Internal_Sym sym;
11138
11139 htab = elf32_arm_hash_table (osi->info);
11140 sym.st_value = osi->sec->output_section->vma
11141 + osi->sec->output_offset
11142 + offset;
11143 sym.st_size = 0;
11144 sym.st_other = 0;
11145 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
11146 sym.st_shndx = osi->sec_shndx;
11147 if (!osi->func (osi->finfo, names[type], &sym, osi->sec, NULL))
11148 return FALSE;
11149 return TRUE;
11150 }
11151
11152
11153 /* Output mapping symbols for PLT entries associated with H. */
11154
11155 static bfd_boolean
11156 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
11157 {
11158 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
11159 struct elf32_arm_link_hash_table *htab;
11160 struct elf32_arm_link_hash_entry *eh;
11161 bfd_vma addr;
11162
11163 htab = elf32_arm_hash_table (osi->info);
11164
11165 if (h->root.type == bfd_link_hash_indirect)
11166 return TRUE;
11167
11168 if (h->root.type == bfd_link_hash_warning)
11169 /* When warning symbols are created, they **replace** the "real"
11170 entry in the hash table, thus we never get to see the real
11171 symbol in a hash traversal. So look at it now. */
11172 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11173
11174 if (h->plt.offset == (bfd_vma) -1)
11175 return TRUE;
11176
11177 eh = (struct elf32_arm_link_hash_entry *) h;
11178 addr = h->plt.offset;
11179 if (htab->symbian_p)
11180 {
11181 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11182 return FALSE;
11183 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
11184 return FALSE;
11185 }
11186 else if (htab->vxworks_p)
11187 {
11188 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11189 return FALSE;
11190 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11191 return FALSE;
11192 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
11193 return FALSE;
11194 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
11195 return FALSE;
11196 }
11197 else
11198 {
11199 bfd_signed_vma thumb_refs;
11200
11201 thumb_refs = eh->plt_thumb_refcount;
11202 if (!htab->use_blx)
11203 thumb_refs += eh->plt_maybe_thumb_refcount;
11204
11205 if (thumb_refs > 0)
11206 {
11207 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
11208 return FALSE;
11209 }
11210 #ifdef FOUR_WORD_PLT
11211 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11212 return FALSE;
11213 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
11214 return FALSE;
11215 #else
11216 /* A three-word PLT with no Thumb thunk contains only Arm code,
11217 so only need to output a mapping symbol for the first PLT entry and
11218 entries with thumb thunks. */
11219 if (thumb_refs > 0 || addr == 20)
11220 {
11221 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11222 return FALSE;
11223 }
11224 #endif
11225 }
11226
11227 return TRUE;
11228 }
11229
11230 /* Output a single local symbol for a generated stub. */
11231
11232 static bfd_boolean
11233 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
11234 bfd_vma offset, bfd_vma size)
11235 {
11236 struct elf32_arm_link_hash_table *htab;
11237 Elf_Internal_Sym sym;
11238
11239 htab = elf32_arm_hash_table (osi->info);
11240 sym.st_value = osi->sec->output_section->vma
11241 + osi->sec->output_offset
11242 + offset;
11243 sym.st_size = size;
11244 sym.st_other = 0;
11245 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
11246 sym.st_shndx = osi->sec_shndx;
11247 if (!osi->func (osi->finfo, name, &sym, osi->sec, NULL))
11248 return FALSE;
11249 return TRUE;
11250 }
11251
11252 static bfd_boolean
11253 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
11254 void * in_arg)
11255 {
11256 struct elf32_arm_stub_hash_entry *stub_entry;
11257 struct bfd_link_info *info;
11258 struct elf32_arm_link_hash_table *htab;
11259 asection *stub_sec;
11260 bfd_vma addr;
11261 char *stub_name;
11262 output_arch_syminfo *osi;
11263
11264 /* Massage our args to the form they really have. */
11265 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
11266 osi = (output_arch_syminfo *) in_arg;
11267
11268 info = osi->info;
11269
11270 htab = elf32_arm_hash_table (info);
11271 stub_sec = stub_entry->stub_sec;
11272
11273 /* Ensure this stub is attached to the current section being
11274 processed. */
11275 if (stub_sec != osi->sec)
11276 return TRUE;
11277
11278 addr = (bfd_vma) stub_entry->stub_offset;
11279 stub_name = stub_entry->output_name;
11280
11281 switch (stub_entry->stub_type)
11282 {
11283 case arm_stub_long_branch:
11284 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 8))
11285 return FALSE;
11286 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11287 return FALSE;
11288 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
11289 return FALSE;
11290 break;
11291 case arm_thumb_v4t_stub_long_branch:
11292 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 12))
11293 return FALSE;
11294 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11295 return FALSE;
11296 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11297 return FALSE;
11298 break;
11299 case arm_thumb_thumb_stub_long_branch:
11300 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 16))
11301 return FALSE;
11302 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
11303 return FALSE;
11304 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
11305 return FALSE;
11306 break;
11307 case arm_thumb_arm_v4t_stub_long_branch:
11308 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 20))
11309 return FALSE;
11310 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
11311 return FALSE;
11312 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 8))
11313 return FALSE;
11314 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 16))
11315 return FALSE;
11316 break;
11317 case arm_thumb_arm_v4t_stub_short_branch:
11318 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 8))
11319 return FALSE;
11320 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 4))
11321 return FALSE;
11322 break;
11323 case arm_stub_pic_long_branch:
11324 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 12))
11325 return FALSE;
11326 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11327 return FALSE;
11328 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11329 return FALSE;
11330 break;
11331 default:
11332 BFD_FAIL ();
11333 }
11334
11335 return TRUE;
11336 }
11337
11338 /* Output mapping symbols for linker generated sections. */
11339
11340 static bfd_boolean
11341 elf32_arm_output_arch_local_syms (bfd *output_bfd,
11342 struct bfd_link_info *info,
11343 void *finfo,
11344 bfd_boolean (*func) (void *, const char *,
11345 Elf_Internal_Sym *,
11346 asection *,
11347 struct elf_link_hash_entry *))
11348 {
11349 output_arch_syminfo osi;
11350 struct elf32_arm_link_hash_table *htab;
11351 bfd_vma offset;
11352 bfd_size_type size;
11353
11354 htab = elf32_arm_hash_table (info);
11355 check_use_blx (htab);
11356
11357 osi.finfo = finfo;
11358 osi.info = info;
11359 osi.func = func;
11360
11361 /* ARM->Thumb glue. */
11362 if (htab->arm_glue_size > 0)
11363 {
11364 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11365 ARM2THUMB_GLUE_SECTION_NAME);
11366
11367 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11368 (output_bfd, osi.sec->output_section);
11369 if (info->shared || htab->root.is_relocatable_executable
11370 || htab->pic_veneer)
11371 size = ARM2THUMB_PIC_GLUE_SIZE;
11372 else if (htab->use_blx)
11373 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
11374 else
11375 size = ARM2THUMB_STATIC_GLUE_SIZE;
11376
11377 for (offset = 0; offset < htab->arm_glue_size; offset += size)
11378 {
11379 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
11380 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
11381 }
11382 }
11383
11384 /* Thumb->ARM glue. */
11385 if (htab->thumb_glue_size > 0)
11386 {
11387 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11388 THUMB2ARM_GLUE_SECTION_NAME);
11389
11390 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11391 (output_bfd, osi.sec->output_section);
11392 size = THUMB2ARM_GLUE_SIZE;
11393
11394 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
11395 {
11396 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
11397 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
11398 }
11399 }
11400
11401 /* ARMv4 BX veneers. */
11402 if (htab->bx_glue_size > 0)
11403 {
11404 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11405 ARM_BX_GLUE_SECTION_NAME);
11406
11407 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11408 (output_bfd, osi.sec->output_section);
11409
11410 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
11411 }
11412
11413 /* Long calls stubs. */
11414 if (htab->stub_bfd && htab->stub_bfd->sections)
11415 {
11416 asection* stub_sec;
11417
11418 for (stub_sec = htab->stub_bfd->sections;
11419 stub_sec != NULL;
11420 stub_sec = stub_sec->next)
11421 {
11422 /* Ignore non-stub sections. */
11423 if (!strstr (stub_sec->name, STUB_SUFFIX))
11424 continue;
11425
11426 osi.sec = stub_sec;
11427
11428 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11429 (output_bfd, osi.sec->output_section);
11430
11431 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
11432 }
11433 }
11434
11435 /* Finally, output mapping symbols for the PLT. */
11436 if (!htab->splt || htab->splt->size == 0)
11437 return TRUE;
11438
11439 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
11440 htab->splt->output_section);
11441 osi.sec = htab->splt;
11442 /* Output mapping symbols for the plt header. SymbianOS does not have a
11443 plt header. */
11444 if (htab->vxworks_p)
11445 {
11446 /* VxWorks shared libraries have no PLT header. */
11447 if (!info->shared)
11448 {
11449 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
11450 return FALSE;
11451 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
11452 return FALSE;
11453 }
11454 }
11455 else if (!htab->symbian_p)
11456 {
11457 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
11458 return FALSE;
11459 #ifndef FOUR_WORD_PLT
11460 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
11461 return FALSE;
11462 #endif
11463 }
11464
11465 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
11466 return TRUE;
11467 }
11468
11469 /* Allocate target specific section data. */
11470
11471 static bfd_boolean
11472 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
11473 {
11474 if (!sec->used_by_bfd)
11475 {
11476 _arm_elf_section_data *sdata;
11477 bfd_size_type amt = sizeof (*sdata);
11478
11479 sdata = bfd_zalloc (abfd, amt);
11480 if (sdata == NULL)
11481 return FALSE;
11482 sec->used_by_bfd = sdata;
11483 }
11484
11485 record_section_with_arm_elf_section_data (sec);
11486
11487 return _bfd_elf_new_section_hook (abfd, sec);
11488 }
11489
11490
11491 /* Used to order a list of mapping symbols by address. */
11492
11493 static int
11494 elf32_arm_compare_mapping (const void * a, const void * b)
11495 {
11496 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
11497 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
11498
11499 if (amap->vma > bmap->vma)
11500 return 1;
11501 else if (amap->vma < bmap->vma)
11502 return -1;
11503 else if (amap->type > bmap->type)
11504 /* Ensure results do not depend on the host qsort for objects with
11505 multiple mapping symbols at the same address by sorting on type
11506 after vma. */
11507 return 1;
11508 else if (amap->type < bmap->type)
11509 return -1;
11510 else
11511 return 0;
11512 }
11513
11514
11515 /* Do code byteswapping. Return FALSE afterwards so that the section is
11516 written out as normal. */
11517
11518 static bfd_boolean
11519 elf32_arm_write_section (bfd *output_bfd,
11520 struct bfd_link_info *link_info,
11521 asection *sec,
11522 bfd_byte *contents)
11523 {
11524 int mapcount, errcount;
11525 _arm_elf_section_data *arm_data;
11526 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
11527 elf32_arm_section_map *map;
11528 elf32_vfp11_erratum_list *errnode;
11529 bfd_vma ptr;
11530 bfd_vma end;
11531 bfd_vma offset = sec->output_section->vma + sec->output_offset;
11532 bfd_byte tmp;
11533 int i;
11534
11535 /* If this section has not been allocated an _arm_elf_section_data
11536 structure then we cannot record anything. */
11537 arm_data = get_arm_elf_section_data (sec);
11538 if (arm_data == NULL)
11539 return FALSE;
11540
11541 mapcount = arm_data->mapcount;
11542 map = arm_data->map;
11543 errcount = arm_data->erratumcount;
11544
11545 if (errcount != 0)
11546 {
11547 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
11548
11549 for (errnode = arm_data->erratumlist; errnode != 0;
11550 errnode = errnode->next)
11551 {
11552 bfd_vma index = errnode->vma - offset;
11553
11554 switch (errnode->type)
11555 {
11556 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
11557 {
11558 bfd_vma branch_to_veneer;
11559 /* Original condition code of instruction, plus bit mask for
11560 ARM B instruction. */
11561 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
11562 | 0x0a000000;
11563
11564 /* The instruction is before the label. */
11565 index -= 4;
11566
11567 /* Above offset included in -4 below. */
11568 branch_to_veneer = errnode->u.b.veneer->vma
11569 - errnode->vma - 4;
11570
11571 if ((signed) branch_to_veneer < -(1 << 25)
11572 || (signed) branch_to_veneer >= (1 << 25))
11573 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
11574 "range"), output_bfd);
11575
11576 insn |= (branch_to_veneer >> 2) & 0xffffff;
11577 contents[endianflip ^ index] = insn & 0xff;
11578 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
11579 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
11580 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
11581 }
11582 break;
11583
11584 case VFP11_ERRATUM_ARM_VENEER:
11585 {
11586 bfd_vma branch_from_veneer;
11587 unsigned int insn;
11588
11589 /* Take size of veneer into account. */
11590 branch_from_veneer = errnode->u.v.branch->vma
11591 - errnode->vma - 12;
11592
11593 if ((signed) branch_from_veneer < -(1 << 25)
11594 || (signed) branch_from_veneer >= (1 << 25))
11595 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
11596 "range"), output_bfd);
11597
11598 /* Original instruction. */
11599 insn = errnode->u.v.branch->u.b.vfp_insn;
11600 contents[endianflip ^ index] = insn & 0xff;
11601 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
11602 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
11603 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
11604
11605 /* Branch back to insn after original insn. */
11606 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
11607 contents[endianflip ^ (index + 4)] = insn & 0xff;
11608 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
11609 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
11610 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
11611 }
11612 break;
11613
11614 default:
11615 abort ();
11616 }
11617 }
11618 }
11619
11620 if (mapcount == 0)
11621 return FALSE;
11622
11623 if (globals->byteswap_code)
11624 {
11625 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
11626
11627 ptr = map[0].vma;
11628 for (i = 0; i < mapcount; i++)
11629 {
11630 if (i == mapcount - 1)
11631 end = sec->size;
11632 else
11633 end = map[i + 1].vma;
11634
11635 switch (map[i].type)
11636 {
11637 case 'a':
11638 /* Byte swap code words. */
11639 while (ptr + 3 < end)
11640 {
11641 tmp = contents[ptr];
11642 contents[ptr] = contents[ptr + 3];
11643 contents[ptr + 3] = tmp;
11644 tmp = contents[ptr + 1];
11645 contents[ptr + 1] = contents[ptr + 2];
11646 contents[ptr + 2] = tmp;
11647 ptr += 4;
11648 }
11649 break;
11650
11651 case 't':
11652 /* Byte swap code halfwords. */
11653 while (ptr + 1 < end)
11654 {
11655 tmp = contents[ptr];
11656 contents[ptr] = contents[ptr + 1];
11657 contents[ptr + 1] = tmp;
11658 ptr += 2;
11659 }
11660 break;
11661
11662 case 'd':
11663 /* Leave data alone. */
11664 break;
11665 }
11666 ptr = end;
11667 }
11668 }
11669
11670 free (map);
11671 arm_data->mapcount = 0;
11672 arm_data->mapsize = 0;
11673 arm_data->map = NULL;
11674 unrecord_section_with_arm_elf_section_data (sec);
11675
11676 return FALSE;
11677 }
11678
11679 static void
11680 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
11681 asection * sec,
11682 void * ignore ATTRIBUTE_UNUSED)
11683 {
11684 unrecord_section_with_arm_elf_section_data (sec);
11685 }
11686
11687 static bfd_boolean
11688 elf32_arm_close_and_cleanup (bfd * abfd)
11689 {
11690 if (abfd->sections)
11691 bfd_map_over_sections (abfd,
11692 unrecord_section_via_map_over_sections,
11693 NULL);
11694
11695 return _bfd_elf_close_and_cleanup (abfd);
11696 }
11697
11698 static bfd_boolean
11699 elf32_arm_bfd_free_cached_info (bfd * abfd)
11700 {
11701 if (abfd->sections)
11702 bfd_map_over_sections (abfd,
11703 unrecord_section_via_map_over_sections,
11704 NULL);
11705
11706 return _bfd_free_cached_info (abfd);
11707 }
11708
11709 /* Display STT_ARM_TFUNC symbols as functions. */
11710
11711 static void
11712 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
11713 asymbol *asym)
11714 {
11715 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
11716
11717 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
11718 elfsym->symbol.flags |= BSF_FUNCTION;
11719 }
11720
11721
11722 /* Mangle thumb function symbols as we read them in. */
11723
11724 static bfd_boolean
11725 elf32_arm_swap_symbol_in (bfd * abfd,
11726 const void *psrc,
11727 const void *pshn,
11728 Elf_Internal_Sym *dst)
11729 {
11730 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
11731 return FALSE;
11732
11733 /* New EABI objects mark thumb function symbols by setting the low bit of
11734 the address. Turn these into STT_ARM_TFUNC. */
11735 if ((ELF_ST_TYPE (dst->st_info) == STT_FUNC)
11736 && (dst->st_value & 1))
11737 {
11738 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
11739 dst->st_value &= ~(bfd_vma) 1;
11740 }
11741 return TRUE;
11742 }
11743
11744
11745 /* Mangle thumb function symbols as we write them out. */
11746
11747 static void
11748 elf32_arm_swap_symbol_out (bfd *abfd,
11749 const Elf_Internal_Sym *src,
11750 void *cdst,
11751 void *shndx)
11752 {
11753 Elf_Internal_Sym newsym;
11754
11755 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
11756 of the address set, as per the new EABI. We do this unconditionally
11757 because objcopy does not set the elf header flags until after
11758 it writes out the symbol table. */
11759 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
11760 {
11761 newsym = *src;
11762 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
11763 if (newsym.st_shndx != SHN_UNDEF)
11764 {
11765 /* Do this only for defined symbols. At link type, the static
11766 linker will simulate the work of dynamic linker of resolving
11767 symbols and will carry over the thumbness of found symbols to
11768 the output symbol table. It's not clear how it happens, but
11769 the thumbness of undefined symbols can well be different at
11770 runtime, and writing '1' for them will be confusing for users
11771 and possibly for dynamic linker itself.
11772 */
11773 newsym.st_value |= 1;
11774 }
11775
11776 src = &newsym;
11777 }
11778 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
11779 }
11780
11781 /* Add the PT_ARM_EXIDX program header. */
11782
11783 static bfd_boolean
11784 elf32_arm_modify_segment_map (bfd *abfd,
11785 struct bfd_link_info *info ATTRIBUTE_UNUSED)
11786 {
11787 struct elf_segment_map *m;
11788 asection *sec;
11789
11790 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
11791 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
11792 {
11793 /* If there is already a PT_ARM_EXIDX header, then we do not
11794 want to add another one. This situation arises when running
11795 "strip"; the input binary already has the header. */
11796 m = elf_tdata (abfd)->segment_map;
11797 while (m && m->p_type != PT_ARM_EXIDX)
11798 m = m->next;
11799 if (!m)
11800 {
11801 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
11802 if (m == NULL)
11803 return FALSE;
11804 m->p_type = PT_ARM_EXIDX;
11805 m->count = 1;
11806 m->sections[0] = sec;
11807
11808 m->next = elf_tdata (abfd)->segment_map;
11809 elf_tdata (abfd)->segment_map = m;
11810 }
11811 }
11812
11813 return TRUE;
11814 }
11815
11816 /* We may add a PT_ARM_EXIDX program header. */
11817
11818 static int
11819 elf32_arm_additional_program_headers (bfd *abfd,
11820 struct bfd_link_info *info ATTRIBUTE_UNUSED)
11821 {
11822 asection *sec;
11823
11824 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
11825 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
11826 return 1;
11827 else
11828 return 0;
11829 }
11830
11831 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
11832
11833 static bfd_boolean
11834 elf32_arm_is_function_type (unsigned int type)
11835 {
11836 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
11837 }
11838
11839 /* We use this to override swap_symbol_in and swap_symbol_out. */
11840 const struct elf_size_info elf32_arm_size_info =
11841 {
11842 sizeof (Elf32_External_Ehdr),
11843 sizeof (Elf32_External_Phdr),
11844 sizeof (Elf32_External_Shdr),
11845 sizeof (Elf32_External_Rel),
11846 sizeof (Elf32_External_Rela),
11847 sizeof (Elf32_External_Sym),
11848 sizeof (Elf32_External_Dyn),
11849 sizeof (Elf_External_Note),
11850 4,
11851 1,
11852 32, 2,
11853 ELFCLASS32, EV_CURRENT,
11854 bfd_elf32_write_out_phdrs,
11855 bfd_elf32_write_shdrs_and_ehdr,
11856 bfd_elf32_checksum_contents,
11857 bfd_elf32_write_relocs,
11858 elf32_arm_swap_symbol_in,
11859 elf32_arm_swap_symbol_out,
11860 bfd_elf32_slurp_reloc_table,
11861 bfd_elf32_slurp_symbol_table,
11862 bfd_elf32_swap_dyn_in,
11863 bfd_elf32_swap_dyn_out,
11864 bfd_elf32_swap_reloc_in,
11865 bfd_elf32_swap_reloc_out,
11866 bfd_elf32_swap_reloca_in,
11867 bfd_elf32_swap_reloca_out
11868 };
11869
11870 #define ELF_ARCH bfd_arch_arm
11871 #define ELF_MACHINE_CODE EM_ARM
11872 #ifdef __QNXTARGET__
11873 #define ELF_MAXPAGESIZE 0x1000
11874 #else
11875 #define ELF_MAXPAGESIZE 0x8000
11876 #endif
11877 #define ELF_MINPAGESIZE 0x1000
11878 #define ELF_COMMONPAGESIZE 0x1000
11879
11880 #define bfd_elf32_mkobject elf32_arm_mkobject
11881
11882 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
11883 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
11884 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
11885 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
11886 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
11887 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
11888 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
11889 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
11890 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
11891 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
11892 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
11893 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
11894 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
11895 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
11896
11897 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
11898 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
11899 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
11900 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
11901 #define elf_backend_check_relocs elf32_arm_check_relocs
11902 #define elf_backend_relocate_section elf32_arm_relocate_section
11903 #define elf_backend_write_section elf32_arm_write_section
11904 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
11905 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
11906 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
11907 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
11908 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
11909 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
11910 #define elf_backend_post_process_headers elf32_arm_post_process_headers
11911 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
11912 #define elf_backend_object_p elf32_arm_object_p
11913 #define elf_backend_section_flags elf32_arm_section_flags
11914 #define elf_backend_fake_sections elf32_arm_fake_sections
11915 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
11916 #define elf_backend_final_write_processing elf32_arm_final_write_processing
11917 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
11918 #define elf_backend_symbol_processing elf32_arm_symbol_processing
11919 #define elf_backend_size_info elf32_arm_size_info
11920 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
11921 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
11922 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
11923 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
11924 #define elf_backend_is_function_type elf32_arm_is_function_type
11925
11926 #define elf_backend_can_refcount 1
11927 #define elf_backend_can_gc_sections 1
11928 #define elf_backend_plt_readonly 1
11929 #define elf_backend_want_got_plt 1
11930 #define elf_backend_want_plt_sym 0
11931 #define elf_backend_may_use_rel_p 1
11932 #define elf_backend_may_use_rela_p 0
11933 #define elf_backend_default_use_rela_p 0
11934
11935 #define elf_backend_got_header_size 12
11936
11937 #undef elf_backend_obj_attrs_vendor
11938 #define elf_backend_obj_attrs_vendor "aeabi"
11939 #undef elf_backend_obj_attrs_section
11940 #define elf_backend_obj_attrs_section ".ARM.attributes"
11941 #undef elf_backend_obj_attrs_arg_type
11942 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
11943 #undef elf_backend_obj_attrs_section_type
11944 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
11945
11946 #include "elf32-target.h"
11947
11948 /* VxWorks Targets. */
11949
11950 #undef TARGET_LITTLE_SYM
11951 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
11952 #undef TARGET_LITTLE_NAME
11953 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
11954 #undef TARGET_BIG_SYM
11955 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
11956 #undef TARGET_BIG_NAME
11957 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
11958
11959 /* Like elf32_arm_link_hash_table_create -- but overrides
11960 appropriately for VxWorks. */
11961
11962 static struct bfd_link_hash_table *
11963 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
11964 {
11965 struct bfd_link_hash_table *ret;
11966
11967 ret = elf32_arm_link_hash_table_create (abfd);
11968 if (ret)
11969 {
11970 struct elf32_arm_link_hash_table *htab
11971 = (struct elf32_arm_link_hash_table *) ret;
11972 htab->use_rel = 0;
11973 htab->vxworks_p = 1;
11974 }
11975 return ret;
11976 }
11977
11978 static void
11979 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11980 {
11981 elf32_arm_final_write_processing (abfd, linker);
11982 elf_vxworks_final_write_processing (abfd, linker);
11983 }
11984
11985 #undef elf32_bed
11986 #define elf32_bed elf32_arm_vxworks_bed
11987
11988 #undef bfd_elf32_bfd_link_hash_table_create
11989 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
11990 #undef elf_backend_add_symbol_hook
11991 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
11992 #undef elf_backend_final_write_processing
11993 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
11994 #undef elf_backend_emit_relocs
11995 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
11996
11997 #undef elf_backend_may_use_rel_p
11998 #define elf_backend_may_use_rel_p 0
11999 #undef elf_backend_may_use_rela_p
12000 #define elf_backend_may_use_rela_p 1
12001 #undef elf_backend_default_use_rela_p
12002 #define elf_backend_default_use_rela_p 1
12003 #undef elf_backend_want_plt_sym
12004 #define elf_backend_want_plt_sym 1
12005 #undef ELF_MAXPAGESIZE
12006 #define ELF_MAXPAGESIZE 0x1000
12007
12008 #include "elf32-target.h"
12009
12010
12011 /* Symbian OS Targets. */
12012
12013 #undef TARGET_LITTLE_SYM
12014 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
12015 #undef TARGET_LITTLE_NAME
12016 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
12017 #undef TARGET_BIG_SYM
12018 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
12019 #undef TARGET_BIG_NAME
12020 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
12021
12022 /* Like elf32_arm_link_hash_table_create -- but overrides
12023 appropriately for Symbian OS. */
12024
12025 static struct bfd_link_hash_table *
12026 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
12027 {
12028 struct bfd_link_hash_table *ret;
12029
12030 ret = elf32_arm_link_hash_table_create (abfd);
12031 if (ret)
12032 {
12033 struct elf32_arm_link_hash_table *htab
12034 = (struct elf32_arm_link_hash_table *)ret;
12035 /* There is no PLT header for Symbian OS. */
12036 htab->plt_header_size = 0;
12037 /* The PLT entries are each one instruction and one word. */
12038 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
12039 htab->symbian_p = 1;
12040 /* Symbian uses armv5t or above, so use_blx is always true. */
12041 htab->use_blx = 1;
12042 htab->root.is_relocatable_executable = 1;
12043 }
12044 return ret;
12045 }
12046
12047 static const struct bfd_elf_special_section
12048 elf32_arm_symbian_special_sections[] =
12049 {
12050 /* In a BPABI executable, the dynamic linking sections do not go in
12051 the loadable read-only segment. The post-linker may wish to
12052 refer to these sections, but they are not part of the final
12053 program image. */
12054 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
12055 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
12056 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
12057 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
12058 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
12059 /* These sections do not need to be writable as the SymbianOS
12060 postlinker will arrange things so that no dynamic relocation is
12061 required. */
12062 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
12063 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
12064 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
12065 { NULL, 0, 0, 0, 0 }
12066 };
12067
12068 static void
12069 elf32_arm_symbian_begin_write_processing (bfd *abfd,
12070 struct bfd_link_info *link_info)
12071 {
12072 /* BPABI objects are never loaded directly by an OS kernel; they are
12073 processed by a postlinker first, into an OS-specific format. If
12074 the D_PAGED bit is set on the file, BFD will align segments on
12075 page boundaries, so that an OS can directly map the file. With
12076 BPABI objects, that just results in wasted space. In addition,
12077 because we clear the D_PAGED bit, map_sections_to_segments will
12078 recognize that the program headers should not be mapped into any
12079 loadable segment. */
12080 abfd->flags &= ~D_PAGED;
12081 elf32_arm_begin_write_processing (abfd, link_info);
12082 }
12083
12084 static bfd_boolean
12085 elf32_arm_symbian_modify_segment_map (bfd *abfd,
12086 struct bfd_link_info *info)
12087 {
12088 struct elf_segment_map *m;
12089 asection *dynsec;
12090
12091 /* BPABI shared libraries and executables should have a PT_DYNAMIC
12092 segment. However, because the .dynamic section is not marked
12093 with SEC_LOAD, the generic ELF code will not create such a
12094 segment. */
12095 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
12096 if (dynsec)
12097 {
12098 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
12099 if (m->p_type == PT_DYNAMIC)
12100 break;
12101
12102 if (m == NULL)
12103 {
12104 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
12105 m->next = elf_tdata (abfd)->segment_map;
12106 elf_tdata (abfd)->segment_map = m;
12107 }
12108 }
12109
12110 /* Also call the generic arm routine. */
12111 return elf32_arm_modify_segment_map (abfd, info);
12112 }
12113
12114 /* Return address for Ith PLT stub in section PLT, for relocation REL
12115 or (bfd_vma) -1 if it should not be included. */
12116
12117 static bfd_vma
12118 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
12119 const arelent *rel ATTRIBUTE_UNUSED)
12120 {
12121 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
12122 }
12123
12124
12125 #undef elf32_bed
12126 #define elf32_bed elf32_arm_symbian_bed
12127
12128 /* The dynamic sections are not allocated on SymbianOS; the postlinker
12129 will process them and then discard them. */
12130 #undef ELF_DYNAMIC_SEC_FLAGS
12131 #define ELF_DYNAMIC_SEC_FLAGS \
12132 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
12133
12134 #undef elf_backend_add_symbol_hook
12135 #undef elf_backend_emit_relocs
12136
12137 #undef bfd_elf32_bfd_link_hash_table_create
12138 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
12139 #undef elf_backend_special_sections
12140 #define elf_backend_special_sections elf32_arm_symbian_special_sections
12141 #undef elf_backend_begin_write_processing
12142 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
12143 #undef elf_backend_final_write_processing
12144 #define elf_backend_final_write_processing elf32_arm_final_write_processing
12145
12146 #undef elf_backend_modify_segment_map
12147 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
12148
12149 /* There is no .got section for BPABI objects, and hence no header. */
12150 #undef elf_backend_got_header_size
12151 #define elf_backend_got_header_size 0
12152
12153 /* Similarly, there is no .got.plt section. */
12154 #undef elf_backend_want_got_plt
12155 #define elf_backend_want_got_plt 0
12156
12157 #undef elf_backend_plt_sym_val
12158 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
12159
12160 #undef elf_backend_may_use_rel_p
12161 #define elf_backend_may_use_rel_p 1
12162 #undef elf_backend_may_use_rela_p
12163 #define elf_backend_may_use_rela_p 0
12164 #undef elf_backend_default_use_rela_p
12165 #define elf_backend_default_use_rela_p 0
12166 #undef elf_backend_want_plt_sym
12167 #define elf_backend_want_plt_sym 0
12168 #undef ELF_MAXPAGESIZE
12169 #define ELF_MAXPAGESIZE 0x8000
12170
12171 #include "elf32-target.h"
GDB Binutils - Deliverables
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