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* irix-core.c: Convert to ISO C.
[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
CommitLineData
252b5132 1/* 32-bit ELF support for ARM
4e7fd91e 2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
d1f161ea 3 Free Software Foundation, Inc.
252b5132
RH		 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
7f266840
DJ		 21#include "elf/arm.h"
22#include "bfd.h"
23#include "sysdep.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
26
27#ifndef NUM_ELEM
28#define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
29#endif
30
7f266840
DJ		 31#define elf_info_to_howto 0
32#define elf_info_to_howto_rel elf32_arm_info_to_howto
33
34#define ARM_ELF_ABI_VERSION 0
35#define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
36
37static reloc_howto_type * elf32_arm_reloc_type_lookup
38 PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
39static bfd_boolean elf32_arm_nabi_grok_prstatus
40 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
41static bfd_boolean elf32_arm_nabi_grok_psinfo
42 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
43
44/* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
45 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
46 in that slot. */
47
48static reloc_howto_type elf32_arm_howto_table[] =
49{
50 /* No relocation */
51 HOWTO (R_ARM_NONE, /* type */
52 0, /* rightshift */
53 0, /* size (0 = byte, 1 = short, 2 = long) */
54 0, /* bitsize */
55 FALSE, /* pc_relative */
56 0, /* bitpos */
57 complain_overflow_dont,/* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_ARM_NONE", /* name */
60 FALSE, /* partial_inplace */
61 0, /* src_mask */
62 0, /* dst_mask */
63 FALSE), /* pcrel_offset */
64
65 HOWTO (R_ARM_PC24, /* type */
66 2, /* rightshift */
67 2, /* size (0 = byte, 1 = short, 2 = long) */
68 24, /* bitsize */
69 TRUE, /* pc_relative */
70 0, /* bitpos */
71 complain_overflow_signed,/* complain_on_overflow */
72 bfd_elf_generic_reloc, /* special_function */
73 "R_ARM_PC24", /* name */
74 FALSE, /* partial_inplace */
75 0x00ffffff, /* src_mask */
76 0x00ffffff, /* dst_mask */
77 TRUE), /* pcrel_offset */
78
79 /* 32 bit absolute */
80 HOWTO (R_ARM_ABS32, /* type */
81 0, /* rightshift */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
83 32, /* bitsize */
84 FALSE, /* pc_relative */
85 0, /* bitpos */
86 complain_overflow_bitfield,/* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_ARM_ABS32", /* name */
89 FALSE, /* partial_inplace */
90 0xffffffff, /* src_mask */
91 0xffffffff, /* dst_mask */
92 FALSE), /* pcrel_offset */
93
94 /* standard 32bit pc-relative reloc */
95 HOWTO (R_ARM_REL32, /* type */
96 0, /* rightshift */
97 2, /* size (0 = byte, 1 = short, 2 = long) */
98 32, /* bitsize */
99 TRUE, /* pc_relative */
100 0, /* bitpos */
101 complain_overflow_bitfield,/* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_ARM_REL32", /* name */
104 FALSE, /* partial_inplace */
105 0xffffffff, /* src_mask */
106 0xffffffff, /* dst_mask */
107 TRUE), /* pcrel_offset */
108
109 /* 8 bit absolute */
110 HOWTO (R_ARM_PC13, /* type */
111 0, /* rightshift */
112 0, /* size (0 = byte, 1 = short, 2 = long) */
113 8, /* bitsize */
114 FALSE, /* pc_relative */
115 0, /* bitpos */
116 complain_overflow_bitfield,/* complain_on_overflow */
117 bfd_elf_generic_reloc, /* special_function */
118 "R_ARM_PC13", /* name */
119 FALSE, /* partial_inplace */
120 0x000000ff, /* src_mask */
121 0x000000ff, /* dst_mask */
122 FALSE), /* pcrel_offset */
123
124 /* 16 bit absolute */
125 HOWTO (R_ARM_ABS16, /* type */
126 0, /* rightshift */
127 1, /* size (0 = byte, 1 = short, 2 = long) */
128 16, /* bitsize */
129 FALSE, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_bitfield,/* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_ARM_ABS16", /* name */
134 FALSE, /* partial_inplace */
135 0x0000ffff, /* src_mask */
136 0x0000ffff, /* dst_mask */
137 FALSE), /* pcrel_offset */
138
139 /* 12 bit absolute */
140 HOWTO (R_ARM_ABS12, /* type */
141 0, /* rightshift */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
143 12, /* bitsize */
144 FALSE, /* pc_relative */
145 0, /* bitpos */
146 complain_overflow_bitfield,/* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_ARM_ABS12", /* name */
149 FALSE, /* partial_inplace */
150 0x000008ff, /* src_mask */
151 0x000008ff, /* dst_mask */
152 FALSE), /* pcrel_offset */
153
154 HOWTO (R_ARM_THM_ABS5, /* type */
155 6, /* rightshift */
156 1, /* size (0 = byte, 1 = short, 2 = long) */
157 5, /* bitsize */
158 FALSE, /* pc_relative */
159 0, /* bitpos */
160 complain_overflow_bitfield,/* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_ARM_THM_ABS5", /* name */
163 FALSE, /* partial_inplace */
164 0x000007e0, /* src_mask */
165 0x000007e0, /* dst_mask */
166 FALSE), /* pcrel_offset */
167
168 /* 8 bit absolute */
169 HOWTO (R_ARM_ABS8, /* type */
170 0, /* rightshift */
171 0, /* size (0 = byte, 1 = short, 2 = long) */
172 8, /* bitsize */
173 FALSE, /* pc_relative */
174 0, /* bitpos */
175 complain_overflow_bitfield,/* complain_on_overflow */
176 bfd_elf_generic_reloc, /* special_function */
177 "R_ARM_ABS8", /* name */
178 FALSE, /* partial_inplace */
179 0x000000ff, /* src_mask */
180 0x000000ff, /* dst_mask */
181 FALSE), /* pcrel_offset */
182
183 HOWTO (R_ARM_SBREL32, /* type */
184 0, /* rightshift */
185 2, /* size (0 = byte, 1 = short, 2 = long) */
186 32, /* bitsize */
187 FALSE, /* pc_relative */
188 0, /* bitpos */
189 complain_overflow_dont,/* complain_on_overflow */
190 bfd_elf_generic_reloc, /* special_function */
191 "R_ARM_SBREL32", /* name */
192 FALSE, /* partial_inplace */
193 0xffffffff, /* src_mask */
194 0xffffffff, /* dst_mask */
195 FALSE), /* pcrel_offset */
196
197 HOWTO (R_ARM_THM_PC22, /* type */
198 1, /* rightshift */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
200 23, /* bitsize */
201 TRUE, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_signed,/* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_ARM_THM_PC22", /* name */
206 FALSE, /* partial_inplace */
207 0x07ff07ff, /* src_mask */
208 0x07ff07ff, /* dst_mask */
209 TRUE), /* pcrel_offset */
210
211 HOWTO (R_ARM_THM_PC8, /* type */
212 1, /* rightshift */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
214 8, /* bitsize */
215 TRUE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_signed,/* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_ARM_THM_PC8", /* name */
220 FALSE, /* partial_inplace */
221 0x000000ff, /* src_mask */
222 0x000000ff, /* dst_mask */
223 TRUE), /* pcrel_offset */
224
225 HOWTO (R_ARM_AMP_VCALL9, /* type */
226 1, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 8, /* bitsize */
229 TRUE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_signed,/* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_ARM_AMP_VCALL9", /* name */
234 FALSE, /* partial_inplace */
235 0x000000ff, /* src_mask */
236 0x000000ff, /* dst_mask */
237 TRUE), /* pcrel_offset */
238
239 HOWTO (R_ARM_SWI24, /* type */
240 0, /* rightshift */
241 0, /* size (0 = byte, 1 = short, 2 = long) */
242 0, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_signed,/* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_ARM_SWI24", /* name */
248 FALSE, /* partial_inplace */
249 0x00000000, /* src_mask */
250 0x00000000, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 HOWTO (R_ARM_THM_SWI8, /* type */
254 0, /* rightshift */
255 0, /* size (0 = byte, 1 = short, 2 = long) */
256 0, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_signed,/* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_ARM_SWI8", /* name */
262 FALSE, /* partial_inplace */
263 0x00000000, /* src_mask */
264 0x00000000, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* BLX instruction for the ARM. */
268 HOWTO (R_ARM_XPC25, /* type */
269 2, /* rightshift */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
271 25, /* bitsize */
272 TRUE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_signed,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_ARM_XPC25", /* name */
277 FALSE, /* partial_inplace */
278 0x00ffffff, /* src_mask */
279 0x00ffffff, /* dst_mask */
280 TRUE), /* pcrel_offset */
281
282 /* BLX instruction for the Thumb. */
283 HOWTO (R_ARM_THM_XPC22, /* type */
284 2, /* rightshift */
285 2, /* size (0 = byte, 1 = short, 2 = long) */
286 22, /* bitsize */
287 TRUE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_signed,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_ARM_THM_XPC22", /* name */
292 FALSE, /* partial_inplace */
293 0x07ff07ff, /* src_mask */
294 0x07ff07ff, /* dst_mask */
295 TRUE), /* pcrel_offset */
296
297 /* These next three relocs are not defined, but we need to fill the space. */
298
299 HOWTO (R_ARM_NONE, /* type */
300 0, /* rightshift */
301 0, /* size (0 = byte, 1 = short, 2 = long) */
302 0, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_dont,/* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_ARM_unknown_17", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 HOWTO (R_ARM_NONE, /* type */
314 0, /* rightshift */
315 0, /* size (0 = byte, 1 = short, 2 = long) */
316 0, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_dont,/* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_ARM_unknown_18", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 HOWTO (R_ARM_NONE, /* type */
328 0, /* rightshift */
329 0, /* size (0 = byte, 1 = short, 2 = long) */
330 0, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_dont,/* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 "R_ARM_unknown_19", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* Relocs used in ARM Linux */
342
343 HOWTO (R_ARM_COPY, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 32, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_bitfield,/* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_ARM_COPY", /* name */
352 TRUE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 FALSE), /* pcrel_offset */
356
357 HOWTO (R_ARM_GLOB_DAT, /* type */
358 0, /* rightshift */
359 2, /* size (0 = byte, 1 = short, 2 = long) */
360 32, /* bitsize */
361 FALSE, /* pc_relative */
362 0, /* bitpos */
363 complain_overflow_bitfield,/* complain_on_overflow */
364 bfd_elf_generic_reloc, /* special_function */
365 "R_ARM_GLOB_DAT", /* name */
366 TRUE, /* partial_inplace */
367 0xffffffff, /* src_mask */
368 0xffffffff, /* dst_mask */
369 FALSE), /* pcrel_offset */
370
371 HOWTO (R_ARM_JUMP_SLOT, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 32, /* bitsize */
375 FALSE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_bitfield,/* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_ARM_JUMP_SLOT", /* name */
380 TRUE, /* partial_inplace */
381 0xffffffff, /* src_mask */
382 0xffffffff, /* dst_mask */
383 FALSE), /* pcrel_offset */
384
385 HOWTO (R_ARM_RELATIVE, /* type */
386 0, /* rightshift */
387 2, /* size (0 = byte, 1 = short, 2 = long) */
388 32, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_bitfield,/* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_ARM_RELATIVE", /* name */
394 TRUE, /* partial_inplace */
395 0xffffffff, /* src_mask */
396 0xffffffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 HOWTO (R_ARM_GOTOFF, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 32, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_bitfield,/* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_ARM_GOTOFF", /* name */
408 TRUE, /* partial_inplace */
409 0xffffffff, /* src_mask */
410 0xffffffff, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 HOWTO (R_ARM_GOTPC, /* type */
414 0, /* rightshift */
415 2, /* size (0 = byte, 1 = short, 2 = long) */
416 32, /* bitsize */
417 TRUE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_bitfield,/* complain_on_overflow */
420 bfd_elf_generic_reloc, /* special_function */
421 "R_ARM_GOTPC", /* name */
422 TRUE, /* partial_inplace */
423 0xffffffff, /* src_mask */
424 0xffffffff, /* dst_mask */
425 TRUE), /* pcrel_offset */
426
427 HOWTO (R_ARM_GOT32, /* type */
428 0, /* rightshift */
429 2, /* size (0 = byte, 1 = short, 2 = long) */
430 32, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_bitfield,/* complain_on_overflow */
434 bfd_elf_generic_reloc, /* special_function */
435 "R_ARM_GOT32", /* name */
436 TRUE, /* partial_inplace */
437 0xffffffff, /* src_mask */
438 0xffffffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 HOWTO (R_ARM_PLT32, /* type */
442 2, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 26, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_bitfield,/* complain_on_overflow */
448 bfd_elf_generic_reloc, /* special_function */
449 "R_ARM_PLT32", /* name */
450 TRUE, /* partial_inplace */
451 0x00ffffff, /* src_mask */
452 0x00ffffff, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 HOWTO (R_ARM_CALL, /* type */
456 2, /* rightshift */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
458 24, /* bitsize */
459 TRUE, /* pc_relative */
460 0, /* bitpos */
461 complain_overflow_signed,/* complain_on_overflow */
462 bfd_elf_generic_reloc, /* special_function */
463 "R_ARM_CALL", /* name */
464 FALSE, /* partial_inplace */
465 0x00ffffff, /* src_mask */
466 0x00ffffff, /* dst_mask */
467 TRUE), /* pcrel_offset */
468
469 HOWTO (R_ARM_JUMP24, /* type */
470 2, /* rightshift */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
472 24, /* bitsize */
473 TRUE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_signed,/* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_ARM_JUMP24", /* name */
478 FALSE, /* partial_inplace */
479 0x00ffffff, /* src_mask */
480 0x00ffffff, /* dst_mask */
481 TRUE), /* pcrel_offset */
482
483 HOWTO (R_ARM_NONE, /* type */
484 0, /* rightshift */
485 0, /* size (0 = byte, 1 = short, 2 = long) */
486 0, /* bitsize */
487 FALSE, /* pc_relative */
488 0, /* bitpos */
489 complain_overflow_dont,/* complain_on_overflow */
490 bfd_elf_generic_reloc, /* special_function */
491 "R_ARM_unknown_30", /* name */
492 FALSE, /* partial_inplace */
493 0, /* src_mask */
494 0, /* dst_mask */
495 FALSE), /* pcrel_offset */
496
497 HOWTO (R_ARM_NONE, /* type */
498 0, /* rightshift */
499 0, /* size (0 = byte, 1 = short, 2 = long) */
500 0, /* bitsize */
501 FALSE, /* pc_relative */
502 0, /* bitpos */
503 complain_overflow_dont,/* complain_on_overflow */
504 bfd_elf_generic_reloc, /* special_function */
505 "R_ARM_unknown_31", /* name */
506 FALSE, /* partial_inplace */
507 0, /* src_mask */
508 0, /* dst_mask */
509 FALSE), /* pcrel_offset */
510
511 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
512 0, /* rightshift */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
514 12, /* bitsize */
515 TRUE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont,/* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 "R_ARM_ALU_PCREL_7_0", /* name */
520 FALSE, /* partial_inplace */
521 0x00000fff, /* src_mask */
522 0x00000fff, /* dst_mask */
523 TRUE), /* pcrel_offset */
524
525 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 12, /* bitsize */
529 TRUE, /* pc_relative */
530 8, /* bitpos */
531 complain_overflow_dont,/* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_ARM_ALU_PCREL_15_8",/* name */
534 FALSE, /* partial_inplace */
535 0x00000fff, /* src_mask */
536 0x00000fff, /* dst_mask */
537 TRUE), /* pcrel_offset */
538
539 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
540 0, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 TRUE, /* pc_relative */
544 16, /* bitpos */
545 complain_overflow_dont,/* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_ARM_ALU_PCREL_23_15",/* name */
548 FALSE, /* partial_inplace */
549 0x00000fff, /* src_mask */
550 0x00000fff, /* dst_mask */
551 TRUE), /* pcrel_offset */
552
553 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
554 0, /* rightshift */
555 2, /* size (0 = byte, 1 = short, 2 = long) */
556 12, /* bitsize */
557 FALSE, /* pc_relative */
558 0, /* bitpos */
559 complain_overflow_dont,/* complain_on_overflow */
560 bfd_elf_generic_reloc, /* special_function */
561 "R_ARM_LDR_SBREL_11_0",/* name */
562 FALSE, /* partial_inplace */
563 0x00000fff, /* src_mask */
564 0x00000fff, /* dst_mask */
565 FALSE), /* pcrel_offset */
566
567 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
568 0, /* rightshift */
569 2, /* size (0 = byte, 1 = short, 2 = long) */
570 8, /* bitsize */
571 FALSE, /* pc_relative */
572 12, /* bitpos */
573 complain_overflow_dont,/* complain_on_overflow */
574 bfd_elf_generic_reloc, /* special_function */
575 "R_ARM_ALU_SBREL_19_12",/* name */
576 FALSE, /* partial_inplace */
577 0x000ff000, /* src_mask */
578 0x000ff000, /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
582 0, /* rightshift */
583 2, /* size (0 = byte, 1 = short, 2 = long) */
584 8, /* bitsize */
585 FALSE, /* pc_relative */
586 20, /* bitpos */
587 complain_overflow_dont,/* complain_on_overflow */
588 bfd_elf_generic_reloc, /* special_function */
589 "R_ARM_ALU_SBREL_27_20",/* name */
590 FALSE, /* partial_inplace */
591 0x0ff00000, /* src_mask */
592 0x0ff00000, /* dst_mask */
593 FALSE), /* pcrel_offset */
594
595 HOWTO (R_ARM_TARGET1, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont,/* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_ARM_TARGET1", /* name */
604 FALSE, /* partial_inplace */
605 0xffffffff, /* src_mask */
606 0xffffffff, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 HOWTO (R_ARM_ROSEGREL32, /* type */
610 0, /* rightshift */
611 2, /* size (0 = byte, 1 = short, 2 = long) */
612 32, /* bitsize */
613 FALSE, /* pc_relative */
614 0, /* bitpos */
615 complain_overflow_dont,/* complain_on_overflow */
616 bfd_elf_generic_reloc, /* special_function */
617 "R_ARM_ROSEGREL32", /* name */
618 FALSE, /* partial_inplace */
619 0xffffffff, /* src_mask */
620 0xffffffff, /* dst_mask */
621 FALSE), /* pcrel_offset */
622
623 HOWTO (R_ARM_V4BX, /* type */
624 0, /* rightshift */
625 2, /* size (0 = byte, 1 = short, 2 = long) */
626 32, /* bitsize */
627 FALSE, /* pc_relative */
628 0, /* bitpos */
629 complain_overflow_dont,/* complain_on_overflow */
630 bfd_elf_generic_reloc, /* special_function */
631 "R_ARM_V4BX", /* name */
632 FALSE, /* partial_inplace */
633 0xffffffff, /* src_mask */
634 0xffffffff, /* dst_mask */
635 FALSE), /* pcrel_offset */
636
637 HOWTO (R_ARM_TARGET2, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed,/* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_ARM_TARGET2", /* name */
646 FALSE, /* partial_inplace */
647 0xffffffff, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 HOWTO (R_ARM_PREL31, /* type */
652 0, /* rightshift */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
654 31, /* bitsize */
655 TRUE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_signed,/* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_ARM_PREL31", /* name */
660 FALSE, /* partial_inplace */
661 0x7fffffff, /* src_mask */
662 0x7fffffff, /* dst_mask */
663 TRUE), /* pcrel_offset */
664};
665
666 /* GNU extension to record C++ vtable hierarchy */
667static reloc_howto_type elf32_arm_vtinherit_howto =
668 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
669 0, /* rightshift */
670 2, /* size (0 = byte, 1 = short, 2 = long) */
671 0, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 NULL, /* special_function */
676 "R_ARM_GNU_VTINHERIT", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0, /* dst_mask */
680 FALSE); /* pcrel_offset */
681
682 /* GNU extension to record C++ vtable member usage */
683static reloc_howto_type elf32_arm_vtentry_howto =
684 HOWTO (R_ARM_GNU_VTENTRY, /* type */
685 0, /* rightshift */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
687 0, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_dont, /* complain_on_overflow */
691 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
692 "R_ARM_GNU_VTENTRY", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0, /* dst_mask */
696 FALSE); /* pcrel_offset */
697
698 /* 12 bit pc relative */
699static reloc_howto_type elf32_arm_thm_pc11_howto =
700 HOWTO (R_ARM_THM_PC11, /* type */
701 1, /* rightshift */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
703 11, /* bitsize */
704 TRUE, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_signed, /* complain_on_overflow */
707 bfd_elf_generic_reloc, /* special_function */
708 "R_ARM_THM_PC11", /* name */
709 FALSE, /* partial_inplace */
710 0x000007ff, /* src_mask */
711 0x000007ff, /* dst_mask */
712 TRUE); /* pcrel_offset */
713
714 /* 12 bit pc relative */
715static reloc_howto_type elf32_arm_thm_pc9_howto =
716 HOWTO (R_ARM_THM_PC9, /* type */
717 1, /* rightshift */
718 1, /* size (0 = byte, 1 = short, 2 = long) */
719 8, /* bitsize */
720 TRUE, /* pc_relative */
721 0, /* bitpos */
722 complain_overflow_signed, /* complain_on_overflow */
723 bfd_elf_generic_reloc, /* special_function */
724 "R_ARM_THM_PC9", /* name */
725 FALSE, /* partial_inplace */
726 0x000000ff, /* src_mask */
727 0x000000ff, /* dst_mask */
728 TRUE); /* pcrel_offset */
729
730/* Place relative GOT-indirect. */
731static reloc_howto_type elf32_arm_got_prel =
732 HOWTO (R_ARM_GOT_PREL, /* type */
733 0, /* rightshift */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
735 32, /* bitsize */
736 TRUE, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_dont, /* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_ARM_GOT_PREL", /* name */
741 FALSE, /* partial_inplace */
742 0xffffffff, /* src_mask */
743 0xffffffff, /* dst_mask */
744 TRUE); /* pcrel_offset */
745
746/* Currently unused relocations. */
747static reloc_howto_type elf32_arm_r_howto[4] =
748{
749 HOWTO (R_ARM_RREL32, /* type */
750 0, /* rightshift */
751 0, /* size (0 = byte, 1 = short, 2 = long) */
752 0, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont,/* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_ARM_RREL32", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 HOWTO (R_ARM_RABS32, /* type */
764 0, /* rightshift */
765 0, /* size (0 = byte, 1 = short, 2 = long) */
766 0, /* bitsize */
767 FALSE, /* pc_relative */
768 0, /* bitpos */
769 complain_overflow_dont,/* complain_on_overflow */
770 bfd_elf_generic_reloc, /* special_function */
771 "R_ARM_RABS32", /* name */
772 FALSE, /* partial_inplace */
773 0, /* src_mask */
774 0, /* dst_mask */
775 FALSE), /* pcrel_offset */
776
777 HOWTO (R_ARM_RPC24, /* type */
778 0, /* rightshift */
779 0, /* size (0 = byte, 1 = short, 2 = long) */
780 0, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont,/* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_ARM_RPC24", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 HOWTO (R_ARM_RBASE, /* type */
792 0, /* rightshift */
793 0, /* size (0 = byte, 1 = short, 2 = long) */
794 0, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont,/* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_ARM_RBASE", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0, /* dst_mask */
803 FALSE) /* pcrel_offset */
804};
805
806static reloc_howto_type *
807elf32_arm_howto_from_type (unsigned int r_type)
808{
809 if (r_type < NUM_ELEM (elf32_arm_howto_table))
810 return &elf32_arm_howto_table[r_type];
811
812 switch (r_type)
813 {
814 case R_ARM_GOT_PREL:
815 return &elf32_arm_got_prel;
816
817 case R_ARM_GNU_VTINHERIT:
818 return &elf32_arm_vtinherit_howto;
819
820 case R_ARM_GNU_VTENTRY:
821 return &elf32_arm_vtentry_howto;
822
823 case R_ARM_THM_PC11:
824 return &elf32_arm_thm_pc11_howto;
825
826 case R_ARM_THM_PC9:
827 return &elf32_arm_thm_pc9_howto;
828
829 case R_ARM_RREL32:
830 case R_ARM_RABS32:
831 case R_ARM_RPC24:
832 case R_ARM_RBASE:
833 return &elf32_arm_r_howto[r_type - R_ARM_RREL32];
834
835 default:
836 return NULL;
837 }
838}
839
840static void
841elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
842 Elf_Internal_Rela * elf_reloc)
843{
844 unsigned int r_type;
845
846 r_type = ELF32_R_TYPE (elf_reloc->r_info);
847 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
848}
849
850struct elf32_arm_reloc_map
851 {
852 bfd_reloc_code_real_type bfd_reloc_val;
853 unsigned char elf_reloc_val;
854 };
855
856/* All entries in this list must also be present in elf32_arm_howto_table. */
857static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
858 {
859 {BFD_RELOC_NONE, R_ARM_NONE},
860 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
861 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
862 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
863 {BFD_RELOC_32, R_ARM_ABS32},
864 {BFD_RELOC_32_PCREL, R_ARM_REL32},
865 {BFD_RELOC_8, R_ARM_ABS8},
866 {BFD_RELOC_16, R_ARM_ABS16},
867 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
868 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
869 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22},
870 {BFD_RELOC_ARM_COPY, R_ARM_COPY},
871 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
872 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
873 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
874 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF},
875 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
876 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
877 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
878 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
879 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
880 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
881 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
882 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}
883 };
884
885static reloc_howto_type *
886elf32_arm_reloc_type_lookup (abfd, code)
887 bfd *abfd ATTRIBUTE_UNUSED;
888 bfd_reloc_code_real_type code;
889{
890 unsigned int i;
891
892 switch (code)
893 {
894 case BFD_RELOC_VTABLE_INHERIT:
895 return & elf32_arm_vtinherit_howto;
896
897 case BFD_RELOC_VTABLE_ENTRY:
898 return & elf32_arm_vtentry_howto;
899
900 case BFD_RELOC_THUMB_PCREL_BRANCH12:
901 return & elf32_arm_thm_pc11_howto;
902
903 case BFD_RELOC_THUMB_PCREL_BRANCH9:
904 return & elf32_arm_thm_pc9_howto;
905
906 default:
907 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
908 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
909 return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
910
911 return NULL;
912 }
913}
914
915/* Support for core dump NOTE sections */
916static bfd_boolean
917elf32_arm_nabi_grok_prstatus (abfd, note)
918 bfd *abfd;
919 Elf_Internal_Note *note;
920{
921 int offset;
922 size_t size;
923
924 switch (note->descsz)
925 {
926 default:
927 return FALSE;
928
929 case 148: /* Linux/ARM 32-bit*/
930 /* pr_cursig */
931 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
932
933 /* pr_pid */
934 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
935
936 /* pr_reg */
937 offset = 72;
938 size = 72;
939
940 break;
941 }
942
943 /* Make a ".reg/999" section. */
944 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
945 size, note->descpos + offset);
946}
947
948static bfd_boolean
949elf32_arm_nabi_grok_psinfo (abfd, note)
950 bfd *abfd;
951 Elf_Internal_Note *note;
952{
953 switch (note->descsz)
954 {
955 default:
956 return FALSE;
957
958 case 124: /* Linux/ARM elf_prpsinfo */
959 elf_tdata (abfd)->core_program
960 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
961 elf_tdata (abfd)->core_command
962 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
963 }
964
965 /* Note that for some reason, a spurious space is tacked
966 onto the end of the args in some (at least one anyway)
967 implementations, so strip it off if it exists. */
968
969 {
970 char *command = elf_tdata (abfd)->core_command;
971 int n = strlen (command);
972
973 if (0 < n && command[n - 1] == ' ')
974 command[n - 1] = '\0';
975 }
976
977 return TRUE;
978}
979
980#define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
981#define TARGET_LITTLE_NAME "elf32-littlearm"
982#define TARGET_BIG_SYM bfd_elf32_bigarm_vec
983#define TARGET_BIG_NAME "elf32-bigarm"
984
985#define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
986#define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
987
252b5132
RH		 988typedef unsigned long int insn32;
989typedef unsigned short int insn16;
990
8cb51566 991/* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
57e8b36a 992#define INTERWORK_FLAG(abfd) \
8cb51566 993 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
85a84e7a 994 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
9b485d32 995
252b5132
RH		 996/* The linker script knows the section names for placement.
997 The entry_names are used to do simple name mangling on the stubs.
998 Given a function name, and its type, the stub can be found. The
9b485d32 999 name can be changed. The only requirement is the %s be present. */
252b5132
RH		 1000#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1001#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1002
1003#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1004#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1005
1006/* The name of the dynamic interpreter. This is put in the .interp
1007 section. */
1008#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1009
5e681ec4
PB		 1010#ifdef FOUR_WORD_PLT
1011
252b5132
RH		 1012/* The first entry in a procedure linkage table looks like
1013 this. It is set up so that any shared library function that is
59f2c4e7 1014 called before the relocation has been set up calls the dynamic
9b485d32 1015 linker first. */
e5a52504 1016static const bfd_vma elf32_arm_plt0_entry [] =
5e681ec4
PB		 1017 {
1018 0xe52de004, /* str lr, [sp, #-4]! */
1019 0xe59fe010, /* ldr lr, [pc, #16] */
1020 0xe08fe00e, /* add lr, pc, lr */
1021 0xe5bef008, /* ldr pc, [lr, #8]! */
1022 };
1023
1024/* Subsequent entries in a procedure linkage table look like
1025 this. */
e5a52504 1026static const bfd_vma elf32_arm_plt_entry [] =
5e681ec4
PB		 1027 {
1028 0xe28fc600, /* add ip, pc, #NN */
1029 0xe28cca00, /* add ip, ip, #NN */
1030 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1031 0x00000000, /* unused */
1032 };
1033
1034#else
1035
5e681ec4
PB		 1036/* The first entry in a procedure linkage table looks like
1037 this. It is set up so that any shared library function that is
1038 called before the relocation has been set up calls the dynamic
1039 linker first. */
e5a52504 1040static const bfd_vma elf32_arm_plt0_entry [] =
917583ad 1041 {
5e681ec4
PB		 1042 0xe52de004, /* str lr, [sp, #-4]! */
1043 0xe59fe004, /* ldr lr, [pc, #4] */
1044 0xe08fe00e, /* add lr, pc, lr */
1045 0xe5bef008, /* ldr pc, [lr, #8]! */
1046 0x00000000, /* &GOT[0] - . */
917583ad 1047 };
252b5132
RH		 1048
1049/* Subsequent entries in a procedure linkage table look like
1050 this. */
e5a52504 1051static const bfd_vma elf32_arm_plt_entry [] =
5e681ec4
PB		 1052 {
1053 0xe28fc600, /* add ip, pc, #0xNN00000 */
1054 0xe28cca00, /* add ip, ip, #0xNN000 */
1055 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1056 };
1057
1058#endif
252b5132 1059
b7693d02
DJ		 1060/* An initial stub used if the PLT entry is referenced from Thumb code. */
1061#define PLT_THUMB_STUB_SIZE 4
1062static const bfd_vma elf32_arm_plt_thumb_stub [] =
1063 {
1064 0x4778, /* bx pc */
1065 0x46c0 /* nop */
1066 };
1067
e5a52504
MM		 1068/* The entries in a PLT when using a DLL-based target with multiple
1069 address spaces. */
1070static const bfd_vma elf32_arm_symbian_plt_entry [] =
1071 {
83a358aa 1072 0xe51ff004, /* ldr pc, [pc, #-4] */
e5a52504
MM		 1073 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1074 };
1075
e489d0ae
PB		 1076/* Used to build a map of a section. This is required for mixed-endian
1077 code/data. */
1078
1079typedef struct elf32_elf_section_map
1080{
1081 bfd_vma vma;
1082 char type;
1083}
1084elf32_arm_section_map;
1085
1086struct _arm_elf_section_data
1087{
1088 struct bfd_elf_section_data elf;
1089 int mapcount;
1090 elf32_arm_section_map *map;
1091};
1092
1093#define elf32_arm_section_data(sec) \
1094 ((struct _arm_elf_section_data *) elf_section_data (sec))
1095
252b5132
RH		 1096/* The ARM linker needs to keep track of the number of relocs that it
1097 decides to copy in check_relocs for each symbol. This is so that
1098 it can discard PC relative relocs if it doesn't need them when
1099 linking with -Bsymbolic. We store the information in a field
1100 extending the regular ELF linker hash table. */
1101
1102/* This structure keeps track of the number of PC relative relocs we
1103 have copied for a given symbol. */
5e681ec4 1104struct elf32_arm_relocs_copied
917583ad
NC		 1105 {
1106 /* Next section. */
5e681ec4 1107 struct elf32_arm_relocs_copied * next;
917583ad
NC		 1108 /* A section in dynobj. */
1109 asection * section;
1110 /* Number of relocs copied in this section. */
1111 bfd_size_type count;
1112 };
252b5132 1113
ba96a88f 1114/* Arm ELF linker hash entry. */
252b5132 1115struct elf32_arm_link_hash_entry
917583ad
NC		 1116 {
1117 struct elf_link_hash_entry root;
252b5132 1118
917583ad 1119 /* Number of PC relative relocs copied for this symbol. */
5e681ec4 1120 struct elf32_arm_relocs_copied * relocs_copied;
b7693d02
DJ		 1121
1122 /* We reference count Thumb references to a PLT entry separately,
1123 so that we can emit the Thumb trampoline only if needed. */
1124 bfd_signed_vma plt_thumb_refcount;
1125
1126 /* Since PLT entries have variable size if the Thumb prologue is
1127 used, we need to record the index into .got.plt instead of
1128 recomputing it from the PLT offset. */
1129 bfd_signed_vma plt_got_offset;
917583ad 1130 };
252b5132 1131
252b5132 1132/* Traverse an arm ELF linker hash table. */
252b5132
RH		 1133#define elf32_arm_link_hash_traverse(table, func, info) \
1134 (elf_link_hash_traverse \
1135 (&(table)->root, \
b7693d02 1136 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
252b5132
RH		 1137 (info)))
1138
1139/* Get the ARM elf linker hash table from a link_info structure. */
1140#define elf32_arm_hash_table(info) \
1141 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1142
9b485d32 1143/* ARM ELF linker hash table. */
252b5132 1144struct elf32_arm_link_hash_table
917583ad
NC		 1145 {
1146 /* The main hash table. */
1147 struct elf_link_hash_table root;
252b5132 1148
4cc11e76 1149 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
dc810e39 1150 bfd_size_type thumb_glue_size;
252b5132 1151
4cc11e76 1152 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
dc810e39 1153 bfd_size_type arm_glue_size;
252b5132 1154
4cc11e76 1155 /* An arbitrary input BFD chosen to hold the glue sections. */
917583ad 1156 bfd * bfd_of_glue_owner;
ba96a88f 1157
e489d0ae
PB		 1158 /* Nonzero to output a BE8 image. */
1159 int byteswap_code;
1160
9c504268
PB		 1161 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1162 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1163 int target1_is_rel;
1164
eb043451
PB		 1165 /* The relocation to use for R_ARM_TARGET2 relocations. */
1166 int target2_reloc;
1167
319850b4
JB		 1168 /* Nonzero to fix BX instructions for ARMv4 targets. */
1169 int fix_v4bx;
1170
e5a52504
MM		 1171 /* The number of bytes in the initial entry in the PLT. */
1172 bfd_size_type plt_header_size;
1173
1174 /* The number of bytes in the subsequent PLT etries. */
1175 bfd_size_type plt_entry_size;
1176
1177 /* True if the target system is Symbian OS. */
1178 int symbian_p;
1179
4e7fd91e
PB		 1180 /* True if the target uses REL relocations. */
1181 int use_rel;
1182
5e681ec4
PB		 1183 /* Short-cuts to get to dynamic linker sections. */
1184 asection *sgot;
1185 asection *sgotplt;
1186 asection *srelgot;
1187 asection *splt;
1188 asection *srelplt;
1189 asection *sdynbss;
1190 asection *srelbss;
1191
1192 /* Small local sym to section mapping cache. */
1193 struct sym_sec_cache sym_sec;
b7693d02
DJ		 1194
1195 /* For convenience in allocate_dynrelocs. */
1196 bfd * obfd;
917583ad 1197 };
252b5132 1198
780a67af
NC		 1199/* Create an entry in an ARM ELF linker hash table. */
1200
1201static struct bfd_hash_entry *
57e8b36a
NC		 1202elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1203 struct bfd_hash_table * table,
1204 const char * string)
780a67af
NC		 1205{
1206 struct elf32_arm_link_hash_entry * ret =
1207 (struct elf32_arm_link_hash_entry *) entry;
1208
1209 /* Allocate the structure if it has not already been allocated by a
1210 subclass. */
1211 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
57e8b36a
NC		 1212 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1213 if (ret == NULL)
780a67af
NC		 1214 return (struct bfd_hash_entry *) ret;
1215
1216 /* Call the allocation method of the superclass. */
1217 ret = ((struct elf32_arm_link_hash_entry *)
1218 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1219 table, string));
57e8b36a 1220 if (ret != NULL)
b7693d02
DJ		 1221 {
1222 ret->relocs_copied = NULL;
1223 ret->plt_thumb_refcount = 0;
1224 ret->plt_got_offset = -1;
1225 }
780a67af
NC		 1226
1227 return (struct bfd_hash_entry *) ret;
1228}
1229
5e681ec4
PB		 1230/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1231 shortcuts to them in our hash table. */
1232
1233static bfd_boolean
57e8b36a 1234create_got_section (bfd *dynobj, struct bfd_link_info *info)
5e681ec4
PB		 1235{
1236 struct elf32_arm_link_hash_table *htab;
1237
e5a52504
MM		 1238 htab = elf32_arm_hash_table (info);
1239 /* BPABI objects never have a GOT, or associated sections. */
1240 if (htab->symbian_p)
1241 return TRUE;
1242
5e681ec4
PB		 1243 if (! _bfd_elf_create_got_section (dynobj, info))
1244 return FALSE;
1245
5e681ec4
PB		 1246 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1247 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1248 if (!htab->sgot || !htab->sgotplt)
1249 abort ();
1250
1251 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
1252 if (htab->srelgot == NULL
1253 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1254 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1255 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1256 | SEC_READONLY))
1257 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1258 return FALSE;
1259 return TRUE;
1260}
1261
1262/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1263 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1264 hash table. */
1265
1266static bfd_boolean
57e8b36a 1267elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
5e681ec4
PB		 1268{
1269 struct elf32_arm_link_hash_table *htab;
1270
1271 htab = elf32_arm_hash_table (info);
1272 if (!htab->sgot && !create_got_section (dynobj, info))
1273 return FALSE;
1274
1275 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1276 return FALSE;
1277
1278 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1279 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1280 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1281 if (!info->shared)
1282 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1283
e5a52504
MM		 1284 if (!htab->splt
1285 || !htab->srelplt
1286 || !htab->sdynbss
5e681ec4
PB		 1287 || (!info->shared && !htab->srelbss))
1288 abort ();
1289
1290 return TRUE;
1291}
1292
1293/* Copy the extra info we tack onto an elf_link_hash_entry. */
1294
1295static void
1296elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1297 struct elf_link_hash_entry *dir,
1298 struct elf_link_hash_entry *ind)
1299{
1300 struct elf32_arm_link_hash_entry *edir, *eind;
1301
1302 edir = (struct elf32_arm_link_hash_entry *) dir;
1303 eind = (struct elf32_arm_link_hash_entry *) ind;
1304
1305 if (eind->relocs_copied != NULL)
1306 {
1307 if (edir->relocs_copied != NULL)
1308 {
1309 struct elf32_arm_relocs_copied **pp;
1310 struct elf32_arm_relocs_copied *p;
1311
1312 if (ind->root.type == bfd_link_hash_indirect)
1313 abort ();
1314
1315 /* Add reloc counts against the weak sym to the strong sym
1316 list. Merge any entries against the same section. */
1317 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1318 {
1319 struct elf32_arm_relocs_copied *q;
1320
1321 for (q = edir->relocs_copied; q != NULL; q = q->next)
1322 if (q->section == p->section)
1323 {
5e681ec4
PB		 1324 q->count += p->count;
1325 *pp = p->next;
1326 break;
1327 }
1328 if (q == NULL)
1329 pp = &p->next;
1330 }
1331 *pp = edir->relocs_copied;
1332 }
1333
1334 edir->relocs_copied = eind->relocs_copied;
1335 eind->relocs_copied = NULL;
1336 }
1337
b7693d02
DJ		 1338 /* If the direct symbol already has an associated PLT entry, the
1339 indirect symbol should not. If it doesn't, swap refcount information
1340 from the indirect symbol. */
1341 if (edir->plt_thumb_refcount == 0)
1342 {
1343 edir->plt_thumb_refcount = eind->plt_thumb_refcount;
1344 eind->plt_thumb_refcount = 0;
1345 }
1346 else
1347 BFD_ASSERT (eind->plt_thumb_refcount == 0);
1348
5e681ec4
PB		 1349 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1350}
1351
9b485d32 1352/* Create an ARM elf linker hash table. */
252b5132
RH		 1353
1354static struct bfd_link_hash_table *
57e8b36a 1355elf32_arm_link_hash_table_create (bfd *abfd)
252b5132
RH		 1356{
1357 struct elf32_arm_link_hash_table *ret;
dc810e39 1358 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
252b5132 1359
57e8b36a
NC		 1360 ret = bfd_malloc (amt);
1361 if (ret == NULL)
252b5132
RH		 1362 return NULL;
1363
57e8b36a 1364 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
780a67af 1365 elf32_arm_link_hash_newfunc))
252b5132 1366 {
e2d34d7d 1367 free (ret);
252b5132
RH		 1368 return NULL;
1369 }
1370
5e681ec4
PB		 1371 ret->sgot = NULL;
1372 ret->sgotplt = NULL;
1373 ret->srelgot = NULL;
1374 ret->splt = NULL;
1375 ret->srelplt = NULL;
1376 ret->sdynbss = NULL;
1377 ret->srelbss = NULL;
252b5132
RH		 1378 ret->thumb_glue_size = 0;
1379 ret->arm_glue_size = 0;
1380 ret->bfd_of_glue_owner = NULL;
e489d0ae 1381 ret->byteswap_code = 0;
9c504268 1382 ret->target1_is_rel = 0;
eb043451 1383 ret->target2_reloc = R_ARM_NONE;
e5a52504
MM		 1384#ifdef FOUR_WORD_PLT
1385 ret->plt_header_size = 16;
1386 ret->plt_entry_size = 16;
1387#else
1388 ret->plt_header_size = 20;
1389 ret->plt_entry_size = 12;
1390#endif
1391 ret->symbian_p = 0;
4e7fd91e 1392 ret->use_rel = 1;
5e681ec4 1393 ret->sym_sec.abfd = NULL;
b7693d02 1394 ret->obfd = abfd;
252b5132
RH		 1395
1396 return &ret->root.root;
1397}
1398
9b485d32
NC		 1399/* Locate the Thumb encoded calling stub for NAME. */
1400
252b5132 1401static struct elf_link_hash_entry *
57e8b36a
NC		 1402find_thumb_glue (struct bfd_link_info *link_info,
1403 const char *name,
1404 bfd *input_bfd)
252b5132
RH		 1405{
1406 char *tmp_name;
1407 struct elf_link_hash_entry *hash;
1408 struct elf32_arm_link_hash_table *hash_table;
1409
1410 /* We need a pointer to the armelf specific hash table. */
1411 hash_table = elf32_arm_hash_table (link_info);
1412
57e8b36a
NC		 1413 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1414 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 1415
1416 BFD_ASSERT (tmp_name);
1417
1418 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1419
1420 hash = elf_link_hash_lookup
b34976b6 1421 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH		 1422
1423 if (hash == NULL)
1424 /* xgettext:c-format */
d003868e
AM		 1425 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1426 input_bfd, tmp_name, name);
252b5132
RH		 1427
1428 free (tmp_name);
1429
1430 return hash;
1431}
1432
9b485d32
NC		 1433/* Locate the ARM encoded calling stub for NAME. */
1434
252b5132 1435static struct elf_link_hash_entry *
57e8b36a
NC		 1436find_arm_glue (struct bfd_link_info *link_info,
1437 const char *name,
1438 bfd *input_bfd)
252b5132
RH		 1439{
1440 char *tmp_name;
1441 struct elf_link_hash_entry *myh;
1442 struct elf32_arm_link_hash_table *hash_table;
1443
1444 /* We need a pointer to the elfarm specific hash table. */
1445 hash_table = elf32_arm_hash_table (link_info);
1446
57e8b36a
NC		 1447 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1448 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 1449
1450 BFD_ASSERT (tmp_name);
1451
1452 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1453
1454 myh = elf_link_hash_lookup
b34976b6 1455 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH		 1456
1457 if (myh == NULL)
1458 /* xgettext:c-format */
d003868e
AM		 1459 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1460 input_bfd, tmp_name, name);
252b5132
RH		 1461
1462 free (tmp_name);
1463
1464 return myh;
1465}
1466
9b485d32 1467/* ARM->Thumb glue:
252b5132
RH		 1468
1469 .arm
1470 __func_from_arm:
1471 ldr r12, __func_addr
1472 bx r12
1473 __func_addr:
9b485d32 1474 .word func @ behave as if you saw a ARM_32 reloc. */
252b5132
RH		 1475
1476#define ARM2THUMB_GLUE_SIZE 12
1477static const insn32 a2t1_ldr_insn = 0xe59fc000;
1478static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1479static const insn32 a2t3_func_addr_insn = 0x00000001;
1480
9b485d32 1481/* Thumb->ARM: Thumb->(non-interworking aware) ARM
252b5132
RH		 1482
1483 .thumb .thumb
1484 .align 2 .align 2
1485 __func_from_thumb: __func_from_thumb:
1486 bx pc push {r6, lr}
1487 nop ldr r6, __func_addr
1488 .arm mov lr, pc
1489 __func_change_to_arm: bx r6
1490 b func .arm
1491 __func_back_to_thumb:
1492 ldmia r13! {r6, lr}
1493 bx lr
1494 __func_addr:
9b485d32 1495 .word func */
252b5132
RH		 1496
1497#define THUMB2ARM_GLUE_SIZE 8
1498static const insn16 t2a1_bx_pc_insn = 0x4778;
1499static const insn16 t2a2_noop_insn = 0x46c0;
1500static const insn32 t2a3_b_insn = 0xea000000;
1501
7e392df6 1502#ifndef ELFARM_NABI_C_INCLUDED
b34976b6 1503bfd_boolean
57e8b36a 1504bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
252b5132
RH		 1505{
1506 asection * s;
1507 bfd_byte * foo;
1508 struct elf32_arm_link_hash_table * globals;
1509
1510 globals = elf32_arm_hash_table (info);
1511
1512 BFD_ASSERT (globals != NULL);
1513
1514 if (globals->arm_glue_size != 0)
1515 {
1516 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1517
dc810e39
AM		 1518 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1519 ARM2THUMB_GLUE_SECTION_NAME);
252b5132
RH		 1520
1521 BFD_ASSERT (s != NULL);
1522
57e8b36a 1523 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
252b5132 1524
eea6121a 1525 s->size = globals->arm_glue_size;
252b5132
RH		 1526 s->contents = foo;
1527 }
1528
1529 if (globals->thumb_glue_size != 0)
1530 {
1531 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1532
1533 s = bfd_get_section_by_name
1534 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1535
1536 BFD_ASSERT (s != NULL);
1537
57e8b36a 1538 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
252b5132 1539
eea6121a 1540 s->size = globals->thumb_glue_size;
252b5132
RH		 1541 s->contents = foo;
1542 }
1543
b34976b6 1544 return TRUE;
252b5132
RH		 1545}
1546
1547static void
57e8b36a
NC		 1548record_arm_to_thumb_glue (struct bfd_link_info * link_info,
1549 struct elf_link_hash_entry * h)
252b5132
RH		 1550{
1551 const char * name = h->root.root.string;
63b0f745 1552 asection * s;
252b5132
RH		 1553 char * tmp_name;
1554 struct elf_link_hash_entry * myh;
14a793b2 1555 struct bfd_link_hash_entry * bh;
252b5132 1556 struct elf32_arm_link_hash_table * globals;
dc810e39 1557 bfd_vma val;
252b5132
RH		 1558
1559 globals = elf32_arm_hash_table (link_info);
1560
1561 BFD_ASSERT (globals != NULL);
1562 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1563
1564 s = bfd_get_section_by_name
1565 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1566
252b5132
RH		 1567 BFD_ASSERT (s != NULL);
1568
57e8b36a 1569 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 1570
1571 BFD_ASSERT (tmp_name);
1572
1573 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1574
1575 myh = elf_link_hash_lookup
b34976b6 1576 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH		 1577
1578 if (myh != NULL)
1579 {
9b485d32 1580 /* We've already seen this guy. */
252b5132 1581 free (tmp_name);
9b485d32 1582 return;
252b5132
RH		 1583 }
1584
57e8b36a
NC		 1585 /* The only trick here is using hash_table->arm_glue_size as the value.
1586 Even though the section isn't allocated yet, this is where we will be
1587 putting it. */
14a793b2 1588 bh = NULL;
dc810e39
AM		 1589 val = globals->arm_glue_size + 1;
1590 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
1591 tmp_name, BSF_GLOBAL, s, val,
b34976b6 1592 NULL, TRUE, FALSE, &bh);
252b5132 1593
b7693d02
DJ		 1594 myh = (struct elf_link_hash_entry *) bh;
1595 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
1596 myh->forced_local = 1;
1597
252b5132
RH		 1598 free (tmp_name);
1599
1600 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
1601
1602 return;
1603}
1604
1605static void
57e8b36a
NC		 1606record_thumb_to_arm_glue (struct bfd_link_info *link_info,
1607 struct elf_link_hash_entry *h)
252b5132
RH		 1608{
1609 const char *name = h->root.root.string;
63b0f745 1610 asection *s;
252b5132
RH		 1611 char *tmp_name;
1612 struct elf_link_hash_entry *myh;
14a793b2 1613 struct bfd_link_hash_entry *bh;
252b5132 1614 struct elf32_arm_link_hash_table *hash_table;
dc810e39 1615 bfd_vma val;
252b5132
RH		 1616
1617 hash_table = elf32_arm_hash_table (link_info);
1618
1619 BFD_ASSERT (hash_table != NULL);
1620 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
1621
1622 s = bfd_get_section_by_name
1623 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1624
1625 BFD_ASSERT (s != NULL);
1626
57e8b36a
NC		 1627 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1628 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
252b5132
RH		 1629
1630 BFD_ASSERT (tmp_name);
1631
1632 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1633
1634 myh = elf_link_hash_lookup
b34976b6 1635 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
252b5132
RH		 1636
1637 if (myh != NULL)
1638 {
9b485d32 1639 /* We've already seen this guy. */
252b5132 1640 free (tmp_name);
9b485d32 1641 return;
252b5132
RH		 1642 }
1643
14a793b2 1644 bh = NULL;
dc810e39
AM		 1645 val = hash_table->thumb_glue_size + 1;
1646 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1647 tmp_name, BSF_GLOBAL, s, val,
b34976b6 1648 NULL, TRUE, FALSE, &bh);
252b5132 1649
9b485d32 1650 /* If we mark it 'Thumb', the disassembler will do a better job. */
14a793b2 1651 myh = (struct elf_link_hash_entry *) bh;
b7693d02
DJ		 1652 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
1653 myh->forced_local = 1;
252b5132
RH		 1654
1655 free (tmp_name);
1656
252b5132
RH		 1657#define CHANGE_TO_ARM "__%s_change_to_arm"
1658#define BACK_FROM_ARM "__%s_back_from_arm"
1659
9b485d32 1660 /* Allocate another symbol to mark where we switch to Arm mode. */
57e8b36a
NC		 1661 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1662 + strlen (CHANGE_TO_ARM) + 1);
252b5132
RH		 1663
1664 BFD_ASSERT (tmp_name);
1665
1666 sprintf (tmp_name, CHANGE_TO_ARM, name);
1667
14a793b2 1668 bh = NULL;
dc810e39
AM		 1669 val = hash_table->thumb_glue_size + 4,
1670 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1671 tmp_name, BSF_LOCAL, s, val,
b34976b6 1672 NULL, TRUE, FALSE, &bh);
252b5132
RH		 1673
1674 free (tmp_name);
1675
1676 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
1677
1678 return;
1679}
1680
8afb0e02
NC		 1681/* Add the glue sections to ABFD. This function is called from the
1682 linker scripts in ld/emultempl/{armelf}.em. */
9b485d32 1683
b34976b6 1684bfd_boolean
57e8b36a
NC		 1685bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
1686 struct bfd_link_info *info)
252b5132 1687{
252b5132
RH		 1688 flagword flags;
1689 asection *sec;
1690
8afb0e02
NC		 1691 /* If we are only performing a partial
1692 link do not bother adding the glue. */
1049f94e 1693 if (info->relocatable)
b34976b6 1694 return TRUE;
252b5132 1695
252b5132
RH		 1696 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1697
1698 if (sec == NULL)
1699 {
57db232e
NC		 1700 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1701 will prevent elf_link_input_bfd() from processing the contents
1702 of this section. */
811b4bf6 1703 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
252b5132
RH		 1704
1705 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1706
1707 if (sec == NULL
1708 || !bfd_set_section_flags (abfd, sec, flags)
1709 || !bfd_set_section_alignment (abfd, sec, 2))
b34976b6 1710 return FALSE;
9a5aca8c 1711
57db232e
NC		 1712 /* Set the gc mark to prevent the section from being removed by garbage
1713 collection, despite the fact that no relocs refer to this section. */
1714 sec->gc_mark = 1;
252b5132
RH		 1715 }
1716
1717 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1718
1719 if (sec == NULL)
1720 {
57e8b36a
NC		 1721 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1722 | SEC_CODE | SEC_READONLY;
252b5132
RH		 1723
1724 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1725
1726 if (sec == NULL
1727 || !bfd_set_section_flags (abfd, sec, flags)
1728 || !bfd_set_section_alignment (abfd, sec, 2))
b34976b6 1729 return FALSE;
9a5aca8c 1730
57db232e 1731 sec->gc_mark = 1;
252b5132
RH		 1732 }
1733
b34976b6 1734 return TRUE;
8afb0e02
NC		 1735}
1736
1737/* Select a BFD to be used to hold the sections used by the glue code.
1738 This function is called from the linker scripts in ld/emultempl/
1739 {armelf/pe}.em */
1740
b34976b6 1741bfd_boolean
57e8b36a 1742bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
8afb0e02
NC		 1743{
1744 struct elf32_arm_link_hash_table *globals;
1745
1746 /* If we are only performing a partial link
1747 do not bother getting a bfd to hold the glue. */
1049f94e 1748 if (info->relocatable)
b34976b6 1749 return TRUE;
8afb0e02 1750
b7693d02
DJ		 1751 /* Make sure we don't attach the glue sections to a dynamic object. */
1752 BFD_ASSERT (!(abfd->flags & DYNAMIC));
1753
8afb0e02
NC		 1754 globals = elf32_arm_hash_table (info);
1755
1756 BFD_ASSERT (globals != NULL);
1757
1758 if (globals->bfd_of_glue_owner != NULL)
b34976b6 1759 return TRUE;
8afb0e02 1760
252b5132
RH		 1761 /* Save the bfd for later use. */
1762 globals->bfd_of_glue_owner = abfd;
cedb70c5 1763
b34976b6 1764 return TRUE;
252b5132
RH		 1765}
1766
b34976b6 1767bfd_boolean
57e8b36a
NC		 1768bfd_elf32_arm_process_before_allocation (bfd *abfd,
1769 struct bfd_link_info *link_info,
eb043451 1770 int byteswap_code)
252b5132
RH		 1771{
1772 Elf_Internal_Shdr *symtab_hdr;
6cdc0ccc 1773 Elf_Internal_Rela *internal_relocs = NULL;
252b5132
RH		 1774 Elf_Internal_Rela *irel, *irelend;
1775 bfd_byte *contents = NULL;
252b5132
RH		 1776
1777 asection *sec;
1778 struct elf32_arm_link_hash_table *globals;
1779
1780 /* If we are only performing a partial link do not bother
1781 to construct any glue. */
1049f94e 1782 if (link_info->relocatable)
b34976b6 1783 return TRUE;
252b5132
RH		 1784
1785 /* Here we have a bfd that is to be included on the link. We have a hook
1786 to do reloc rummaging, before section sizes are nailed down. */
252b5132
RH		 1787 globals = elf32_arm_hash_table (link_info);
1788
1789 BFD_ASSERT (globals != NULL);
1790 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1791
e489d0ae
PB		 1792 if (byteswap_code && !bfd_big_endian (abfd))
1793 {
d003868e
AM		 1794 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1795 abfd);
e489d0ae
PB		 1796 return FALSE;
1797 }
1798 globals->byteswap_code = byteswap_code;
f21f3fe0 1799
252b5132
RH		 1800 /* Rummage around all the relocs and map the glue vectors. */
1801 sec = abfd->sections;
1802
1803 if (sec == NULL)
b34976b6 1804 return TRUE;
252b5132
RH		 1805
1806 for (; sec != NULL; sec = sec->next)
1807 {
1808 if (sec->reloc_count == 0)
1809 continue;
1810
1811 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 1812
9b485d32 1813 /* Load the relocs. */
6cdc0ccc 1814 internal_relocs
57e8b36a 1815 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
45d6a902 1816 (Elf_Internal_Rela *) NULL, FALSE);
252b5132 1817
6cdc0ccc
AM		 1818 if (internal_relocs == NULL)
1819 goto error_return;
252b5132 1820
6cdc0ccc
AM		 1821 irelend = internal_relocs + sec->reloc_count;
1822 for (irel = internal_relocs; irel < irelend; irel++)
252b5132
RH		 1823 {
1824 long r_type;
1825 unsigned long r_index;
252b5132
RH		 1826
1827 struct elf_link_hash_entry *h;
1828
1829 r_type = ELF32_R_TYPE (irel->r_info);
1830 r_index = ELF32_R_SYM (irel->r_info);
1831
9b485d32 1832 /* These are the only relocation types we care about. */
ba96a88f 1833 if ( r_type != R_ARM_PC24
b7693d02 1834 && r_type != R_ARM_PLT32
5b5bb741
PB		 1835#ifndef OLD_ARM_ABI
1836 && r_type != R_ARM_CALL
1837 && r_type != R_ARM_JUMP24
1838#endif
252b5132
RH		 1839 && r_type != R_ARM_THM_PC22)
1840 continue;
1841
1842 /* Get the section contents if we haven't done so already. */
1843 if (contents == NULL)
1844 {
1845 /* Get cached copy if it exists. */
1846 if (elf_section_data (sec)->this_hdr.contents != NULL)
1847 contents = elf_section_data (sec)->this_hdr.contents;
1848 else
1849 {
1850 /* Go get them off disk. */
57e8b36a 1851 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
252b5132
RH		 1852 goto error_return;
1853 }
1854 }
1855
a7c10850 1856 /* If the relocation is not against a symbol it cannot concern us. */
252b5132
RH		 1857 h = NULL;
1858
9b485d32 1859 /* We don't care about local symbols. */
252b5132
RH		 1860 if (r_index < symtab_hdr->sh_info)
1861 continue;
1862
9b485d32 1863 /* This is an external symbol. */
252b5132
RH		 1864 r_index -= symtab_hdr->sh_info;
1865 h = (struct elf_link_hash_entry *)
1866 elf_sym_hashes (abfd)[r_index];
1867
1868 /* If the relocation is against a static symbol it must be within
1869 the current section and so cannot be a cross ARM/Thumb relocation. */
1870 if (h == NULL)
1871 continue;
1872
b7693d02
DJ		 1873 /* If the call will go through a PLT entry then we do not need
1874 glue. */
1875 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
1876 continue;
1877
252b5132
RH		 1878 switch (r_type)
1879 {
1880 case R_ARM_PC24:
5b5bb741
PB		 1881#ifndef OLD_ARM_ABI
1882 case R_ARM_CALL:
1883 case R_ARM_JUMP24:
1884#endif
252b5132 1885 /* This one is a call from arm code. We need to look up
2f0ca46a 1886 the target of the call. If it is a thumb target, we
252b5132 1887 insert glue. */
252b5132
RH		 1888 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
1889 record_arm_to_thumb_glue (link_info, h);
1890 break;
1891
1892 case R_ARM_THM_PC22:
f21f3fe0 1893 /* This one is a call from thumb code. We look
2f0ca46a 1894 up the target of the call. If it is not a thumb
bcbdc74c 1895 target, we insert glue. */
252b5132
RH		 1896 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
1897 record_thumb_to_arm_glue (link_info, h);
1898 break;
1899
1900 default:
1901 break;
1902 }
1903 }
6cdc0ccc
AM		 1904
1905 if (contents != NULL
1906 && elf_section_data (sec)->this_hdr.contents != contents)
1907 free (contents);
1908 contents = NULL;
1909
1910 if (internal_relocs != NULL
1911 && elf_section_data (sec)->relocs != internal_relocs)
1912 free (internal_relocs);
1913 internal_relocs = NULL;
252b5132
RH		 1914 }
1915
b34976b6 1916 return TRUE;
9a5aca8c 1917
252b5132 1918error_return:
6cdc0ccc
AM		 1919 if (contents != NULL
1920 && elf_section_data (sec)->this_hdr.contents != contents)
1921 free (contents);
1922 if (internal_relocs != NULL
1923 && elf_section_data (sec)->relocs != internal_relocs)
1924 free (internal_relocs);
9a5aca8c 1925
b34976b6 1926 return FALSE;
252b5132 1927}
7e392df6 1928#endif
252b5132 1929
eb043451
PB		 1930
1931#ifndef OLD_ARM_ABI
1932/* Set target relocation values needed during linking. */
1933
1934void
1935bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
1936 int target1_is_rel,
319850b4
JB		 1937 char * target2_type,
1938 int fix_v4bx)
eb043451
PB		 1939{
1940 struct elf32_arm_link_hash_table *globals;
1941
1942 globals = elf32_arm_hash_table (link_info);
1943
1944 globals->target1_is_rel = target1_is_rel;
1945 if (strcmp (target2_type, "rel") == 0)
1946 globals->target2_reloc = R_ARM_REL32;
eeac373a
PB		 1947 else if (strcmp (target2_type, "abs") == 0)
1948 globals->target2_reloc = R_ARM_ABS32;
eb043451
PB		 1949 else if (strcmp (target2_type, "got-rel") == 0)
1950 globals->target2_reloc = R_ARM_GOT_PREL;
1951 else
1952 {
1953 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
1954 target2_type);
1955 }
319850b4 1956 globals->fix_v4bx = fix_v4bx;
eb043451
PB		 1957}
1958#endif
1959
252b5132
RH		 1960/* The thumb form of a long branch is a bit finicky, because the offset
1961 encoding is split over two fields, each in it's own instruction. They
f21f3fe0 1962 can occur in any order. So given a thumb form of long branch, and an
252b5132 1963 offset, insert the offset into the thumb branch and return finished
f21f3fe0 1964 instruction.
252b5132 1965
f21f3fe0 1966 It takes two thumb instructions to encode the target address. Each has
4cc11e76 1967 11 bits to invest. The upper 11 bits are stored in one (identified by
f21f3fe0
UD		 1968 H-0.. see below), the lower 11 bits are stored in the other (identified
1969 by H-1).
252b5132 1970
f21f3fe0 1971 Combine together and shifted left by 1 (it's a half word address) and
252b5132
RH		 1972 there you have it.
1973
1974 Op: 1111 = F,
1975 H-0, upper address-0 = 000
1976 Op: 1111 = F,
1977 H-1, lower address-0 = 800
1978
f21f3fe0 1979 They can be ordered either way, but the arm tools I've seen always put
252b5132
RH		 1980 the lower one first. It probably doesn't matter. krk@cygnus.com
1981
1982 XXX: Actually the order does matter. The second instruction (H-1)
1983 moves the computed address into the PC, so it must be the second one
1984 in the sequence. The problem, however is that whilst little endian code
1985 stores the instructions in HI then LOW order, big endian code does the
dfc5f959 1986 reverse. nickc@cygnus.com. */
252b5132 1987
dfc5f959
NC		 1988#define LOW_HI_ORDER 0xF800F000
1989#define HI_LOW_ORDER 0xF000F800
252b5132
RH		 1990
1991static insn32
57e8b36a 1992insert_thumb_branch (insn32 br_insn, int rel_off)
252b5132
RH		 1993{
1994 unsigned int low_bits;
1995 unsigned int high_bits;
1996
252b5132
RH		 1997 BFD_ASSERT ((rel_off & 1) != 1);
1998
dfc5f959
NC		 1999 rel_off >>= 1; /* Half word aligned address. */
2000 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2001 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
252b5132
RH		 2002
2003 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2004 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2005 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2006 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2007 else
9b485d32 2008 /* FIXME: abort is probably not the right call. krk@cygnus.com */
57e8b36a 2009 abort (); /* Error - not a valid branch instruction form. */
252b5132 2010
252b5132
RH		 2011 return br_insn;
2012}
2013
9b485d32
NC		 2014/* Thumb code calling an ARM function. */
2015
252b5132 2016static int
57e8b36a
NC		 2017elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2018 const char * name,
2019 bfd * input_bfd,
2020 bfd * output_bfd,
2021 asection * input_section,
2022 bfd_byte * hit_data,
2023 asection * sym_sec,
2024 bfd_vma offset,
2025 bfd_signed_vma addend,
2026 bfd_vma val)
252b5132 2027{
bcbdc74c 2028 asection * s = 0;
dc810e39 2029 bfd_vma my_offset;
252b5132
RH		 2030 unsigned long int tmp;
2031 long int ret_offset;
bcbdc74c
NC		 2032 struct elf_link_hash_entry * myh;
2033 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 2034
2035 myh = find_thumb_glue (info, name, input_bfd);
2036 if (myh == NULL)
b34976b6 2037 return FALSE;
252b5132
RH		 2038
2039 globals = elf32_arm_hash_table (info);
2040
2041 BFD_ASSERT (globals != NULL);
2042 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2043
2044 my_offset = myh->root.u.def.value;
2045
2046 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2047 THUMB2ARM_GLUE_SECTION_NAME);
2048
2049 BFD_ASSERT (s != NULL);
2050 BFD_ASSERT (s->contents != NULL);
2051 BFD_ASSERT (s->output_section != NULL);
2052
2053 if ((my_offset & 0x01) == 0x01)
2054 {
2055 if (sym_sec != NULL
2056 && sym_sec->owner != NULL
2057 && !INTERWORK_FLAG (sym_sec->owner))
2058 {
8f615d07 2059 (*_bfd_error_handler)
d003868e
AM		 2060 (_("%B(%s): warning: interworking not enabled.\n"
2061 " first occurrence: %B: thumb call to arm"),
2062 sym_sec->owner, input_bfd, name);
252b5132 2063
b34976b6 2064 return FALSE;
252b5132
RH		 2065 }
2066
2067 --my_offset;
2068 myh->root.u.def.value = my_offset;
2069
dc810e39 2070 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
252b5132
RH		 2071 s->contents + my_offset);
2072
dc810e39 2073 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
252b5132
RH		 2074 s->contents + my_offset + 2);
2075
2076 ret_offset =
9b485d32
NC		 2077 /* Address of destination of the stub. */
2078 ((bfd_signed_vma) val)
252b5132 2079 - ((bfd_signed_vma)
57e8b36a
NC		 2080 /* Offset from the start of the current section
2081 to the start of the stubs. */
9b485d32
NC		 2082 (s->output_offset
2083 /* Offset of the start of this stub from the start of the stubs. */
2084 + my_offset
2085 /* Address of the start of the current section. */
2086 + s->output_section->vma)
2087 /* The branch instruction is 4 bytes into the stub. */
2088 + 4
2089 /* ARM branches work from the pc of the instruction + 8. */
2090 + 8);
252b5132
RH		 2091
2092 bfd_put_32 (output_bfd,
dc810e39 2093 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
252b5132
RH		 2094 s->contents + my_offset + 4);
2095 }
2096
2097 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2098
427bfd90
NC		 2099 /* Now go back and fix up the original BL insn to point to here. */
2100 ret_offset =
2101 /* Address of where the stub is located. */
2102 (s->output_section->vma + s->output_offset + my_offset)
2103 /* Address of where the BL is located. */
57e8b36a
NC		 2104 - (input_section->output_section->vma + input_section->output_offset
2105 + offset)
427bfd90
NC		 2106 /* Addend in the relocation. */
2107 - addend
2108 /* Biassing for PC-relative addressing. */
2109 - 8;
252b5132
RH		 2110
2111 tmp = bfd_get_32 (input_bfd, hit_data
2112 - input_section->vma);
2113
2114 bfd_put_32 (output_bfd,
dc810e39 2115 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
252b5132
RH		 2116 hit_data - input_section->vma);
2117
b34976b6 2118 return TRUE;
252b5132
RH		 2119}
2120
9b485d32
NC		 2121/* Arm code calling a Thumb function. */
2122
252b5132 2123static int
57e8b36a
NC		 2124elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2125 const char * name,
2126 bfd * input_bfd,
2127 bfd * output_bfd,
2128 asection * input_section,
2129 bfd_byte * hit_data,
2130 asection * sym_sec,
2131 bfd_vma offset,
2132 bfd_signed_vma addend,
2133 bfd_vma val)
252b5132
RH		 2134{
2135 unsigned long int tmp;
dc810e39 2136 bfd_vma my_offset;
bcbdc74c 2137 asection * s;
252b5132 2138 long int ret_offset;
bcbdc74c
NC		 2139 struct elf_link_hash_entry * myh;
2140 struct elf32_arm_link_hash_table * globals;
252b5132
RH		 2141
2142 myh = find_arm_glue (info, name, input_bfd);
2143 if (myh == NULL)
b34976b6 2144 return FALSE;
252b5132
RH		 2145
2146 globals = elf32_arm_hash_table (info);
2147
2148 BFD_ASSERT (globals != NULL);
2149 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2150
2151 my_offset = myh->root.u.def.value;
2152 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2153 ARM2THUMB_GLUE_SECTION_NAME);
2154 BFD_ASSERT (s != NULL);
2155 BFD_ASSERT (s->contents != NULL);
2156 BFD_ASSERT (s->output_section != NULL);
2157
2158 if ((my_offset & 0x01) == 0x01)
2159 {
2160 if (sym_sec != NULL
2161 && sym_sec->owner != NULL
2162 && !INTERWORK_FLAG (sym_sec->owner))
2163 {
8f615d07 2164 (*_bfd_error_handler)
d003868e
AM		 2165 (_("%B(%s): warning: interworking not enabled.\n"
2166 " first occurrence: %B: arm call to thumb"),
2167 sym_sec->owner, input_bfd, name);
252b5132 2168 }
9b485d32 2169
252b5132
RH		 2170 --my_offset;
2171 myh->root.u.def.value = my_offset;
2172
dc810e39 2173 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
252b5132
RH		 2174 s->contents + my_offset);
2175
dc810e39 2176 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
252b5132
RH		 2177 s->contents + my_offset + 4);
2178
2179 /* It's a thumb address. Add the low order bit. */
2180 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2181 s->contents + my_offset + 8);
2182 }
2183
2184 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2185
2186 tmp = bfd_get_32 (input_bfd, hit_data);
2187 tmp = tmp & 0xFF000000;
2188
9b485d32 2189 /* Somehow these are both 4 too far, so subtract 8. */
dc810e39
AM		 2190 ret_offset = (s->output_offset
2191 + my_offset
2192 + s->output_section->vma
2193 - (input_section->output_offset
2194 + input_section->output_section->vma
2195 + offset + addend)
2196 - 8);
9a5aca8c 2197
252b5132
RH		 2198 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2199
dc810e39 2200 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
252b5132 2201
b34976b6 2202 return TRUE;
252b5132
RH		 2203}
2204
eb043451
PB		 2205
2206#ifndef OLD_ARM_ABI
2207/* Some relocations map to different relocations depending on the
2208 target. Return the real relocation. */
2209static int
2210arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2211 int r_type)
2212{
2213 switch (r_type)
2214 {
2215 case R_ARM_TARGET1:
2216 if (globals->target1_is_rel)
2217 return R_ARM_REL32;
2218 else
2219 return R_ARM_ABS32;
2220
2221 case R_ARM_TARGET2:
2222 return globals->target2_reloc;
2223
2224 default:
2225 return r_type;
2226 }
2227}
2228#endif /* OLD_ARM_ABI */
2229
2230
252b5132 2231/* Perform a relocation as part of a final link. */
9b485d32 2232
252b5132 2233static bfd_reloc_status_type
57e8b36a
NC		 2234elf32_arm_final_link_relocate (reloc_howto_type * howto,
2235 bfd * input_bfd,
2236 bfd * output_bfd,
2237 asection * input_section,
2238 bfd_byte * contents,
2239 Elf_Internal_Rela * rel,
2240 bfd_vma value,
2241 struct bfd_link_info * info,
2242 asection * sym_sec,
2243 const char * sym_name,
2244 int sym_flags,
0945cdfd
DJ		 2245 struct elf_link_hash_entry * h,
2246 bfd_boolean * unresolved_reloc_p)
252b5132
RH		 2247{
2248 unsigned long r_type = howto->type;
2249 unsigned long r_symndx;
2250 bfd_byte * hit_data = contents + rel->r_offset;
2251 bfd * dynobj = NULL;
2252 Elf_Internal_Shdr * symtab_hdr;
2253 struct elf_link_hash_entry ** sym_hashes;
2254 bfd_vma * local_got_offsets;
2255 asection * sgot = NULL;
2256 asection * splt = NULL;
2257 asection * sreloc = NULL;
252b5132 2258 bfd_vma addend;
ba96a88f
NC		 2259 bfd_signed_vma signed_addend;
2260 struct elf32_arm_link_hash_table * globals;
f21f3fe0 2261
9c504268
PB		 2262 globals = elf32_arm_hash_table (info);
2263
2264#ifndef OLD_ARM_ABI
2265 /* Some relocation type map to different relocations depending on the
2266 target. We pick the right one here. */
eb043451
PB		 2267 r_type = arm_real_reloc_type (globals, r_type);
2268 if (r_type != howto->type)
2269 howto = elf32_arm_howto_from_type (r_type);
9c504268
PB		 2270#endif /* OLD_ARM_ABI */
2271
cac15327
NC		 2272 /* If the start address has been set, then set the EF_ARM_HASENTRY
2273 flag. Setting this more than once is redundant, but the cost is
2274 not too high, and it keeps the code simple.
99e4ae17 2275
cac15327
NC		 2276 The test is done here, rather than somewhere else, because the
2277 start address is only set just before the final link commences.
2278
2279 Note - if the user deliberately sets a start address of 0, the
2280 flag will not be set. */
2281 if (bfd_get_start_address (output_bfd) != 0)
2282 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
99e4ae17 2283
252b5132
RH		 2284 dynobj = elf_hash_table (info)->dynobj;
2285 if (dynobj)
2286 {
2287 sgot = bfd_get_section_by_name (dynobj, ".got");
2288 splt = bfd_get_section_by_name (dynobj, ".plt");
2289 }
2290 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2291 sym_hashes = elf_sym_hashes (input_bfd);
2292 local_got_offsets = elf_local_got_offsets (input_bfd);
2293 r_symndx = ELF32_R_SYM (rel->r_info);
2294
4e7fd91e 2295 if (globals->use_rel)
ba96a88f 2296 {
4e7fd91e
PB		 2297 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2298
2299 if (addend & ((howto->src_mask + 1) >> 1))
2300 {
2301 signed_addend = -1;
2302 signed_addend &= ~ howto->src_mask;
2303 signed_addend |= addend;
2304 }
2305 else
2306 signed_addend = addend;
ba96a88f
NC		 2307 }
2308 else
4e7fd91e 2309 addend = signed_addend = rel->r_addend;
f21f3fe0 2310
252b5132
RH		 2311 switch (r_type)
2312 {
2313 case R_ARM_NONE:
28a094c2
DJ		 2314 /* We don't need to find a value for this symbol. It's just a
2315 marker. */
2316 *unresolved_reloc_p = FALSE;
252b5132
RH		 2317 return bfd_reloc_ok;
2318
2319 case R_ARM_PC24:
2320 case R_ARM_ABS32:
2321 case R_ARM_REL32:
dfc5f959 2322#ifndef OLD_ARM_ABI
5b5bb741
PB		 2323 case R_ARM_CALL:
2324 case R_ARM_JUMP24:
dfc5f959 2325 case R_ARM_XPC25:
eb043451 2326 case R_ARM_PREL31:
dfc5f959 2327#endif
7359ea65 2328 case R_ARM_PLT32:
5e681ec4
PB		 2329 /* r_symndx will be zero only for relocs against symbols
2330 from removed linkonce sections, or sections discarded by
2331 a linker script. */
2332 if (r_symndx == 0)
2333 return bfd_reloc_ok;
2334
7359ea65
DJ		 2335 /* Handle relocations which should use the PLT entry. ABS32/REL32
2336 will use the symbol's value, which may point to a PLT entry, but we
2337 don't need to handle that here. If we created a PLT entry, all
2338 branches in this object should go to it. */
ee06dc07 2339 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
7359ea65 2340 && h != NULL
c84cd8ee 2341 && splt != NULL
7359ea65
DJ		 2342 && h->plt.offset != (bfd_vma) -1)
2343 {
c84cd8ee
DJ		 2344 /* If we've created a .plt section, and assigned a PLT entry to
2345 this function, it should not be known to bind locally. If
2346 it were, we would have cleared the PLT entry. */
7359ea65
DJ		 2347 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2348
2349 value = (splt->output_section->vma
2350 + splt->output_offset
2351 + h->plt.offset);
0945cdfd 2352 *unresolved_reloc_p = FALSE;
7359ea65
DJ		 2353 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2354 contents, rel->r_offset, value,
2355 (bfd_vma) 0);
2356 }
2357
67687978
PB		 2358 /* When generating a shared object or relocatable executable, these
2359 relocations are copied into the output file to be resolved at
2360 run time. */
2361 if ((info->shared || globals->root.is_relocatable_executable)
7359ea65 2362 && (input_section->flags & SEC_ALLOC)
ee06dc07
PB		 2363 && (r_type != R_ARM_REL32
2364 || !SYMBOL_CALLS_LOCAL (info, h))
7359ea65
DJ		 2365 && (h == NULL
2366 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2367 || h->root.type != bfd_link_hash_undefweak)
2368 && r_type != R_ARM_PC24
5b5bb741
PB		 2369#ifndef OLD_ARM_ABI
2370 && r_type != R_ARM_CALL
2371 && r_type != R_ARM_JUMP24
ee06dc07 2372 && r_type != R_ARM_PREL31
5b5bb741 2373#endif
7359ea65 2374 && r_type != R_ARM_PLT32)
252b5132 2375 {
947216bf
AM		 2376 Elf_Internal_Rela outrel;
2377 bfd_byte *loc;
b34976b6 2378 bfd_boolean skip, relocate;
f21f3fe0 2379
0945cdfd
DJ		 2380 *unresolved_reloc_p = FALSE;
2381
252b5132
RH		 2382 if (sreloc == NULL)
2383 {
2384 const char * name;
f21f3fe0 2385
252b5132
RH		 2386 name = (bfd_elf_string_from_elf_section
2387 (input_bfd,
2388 elf_elfheader (input_bfd)->e_shstrndx,
2389 elf_section_data (input_section)->rel_hdr.sh_name));
2390 if (name == NULL)
2391 return bfd_reloc_notsupported;
f21f3fe0 2392
252b5132
RH		 2393 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2394 && strcmp (bfd_get_section_name (input_bfd,
2395 input_section),
2396 name + 4) == 0);
f21f3fe0 2397
252b5132
RH		 2398 sreloc = bfd_get_section_by_name (dynobj, name);
2399 BFD_ASSERT (sreloc != NULL);
2400 }
f21f3fe0 2401
b34976b6
AM		 2402 skip = FALSE;
2403 relocate = FALSE;
f21f3fe0 2404
c629eae0
JJ		 2405 outrel.r_offset =
2406 _bfd_elf_section_offset (output_bfd, info, input_section,
2407 rel->r_offset);
2408 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2409 skip = TRUE;
0bb2d96a 2410 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2411 skip = TRUE, relocate = TRUE;
252b5132
RH		 2412 outrel.r_offset += (input_section->output_section->vma
2413 + input_section->output_offset);
f21f3fe0 2414
252b5132 2415 if (skip)
0bb2d96a 2416 memset (&outrel, 0, sizeof outrel);
5e681ec4
PB		 2417 else if (h != NULL
2418 && h->dynindx != -1
7359ea65 2419 && (!info->shared
5e681ec4 2420 || !info->symbolic
f5385ebf 2421 || !h->def_regular))
5e681ec4 2422 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2423 else
2424 {
a16385dc
MM		 2425 int symbol;
2426
5e681ec4
PB		 2427 /* This symbol is local, or marked to become local. */
2428 relocate = TRUE;
b7693d02
DJ		 2429 if (sym_flags == STT_ARM_TFUNC)
2430 value |= 1;
a16385dc 2431 if (globals->symbian_p)
6366ff1e
MM		 2432 {
2433 /* On Symbian OS, the data segment and text segement
2434 can be relocated independently. Therefore, we
2435 must indicate the segment to which this
2436 relocation is relative. The BPABI allows us to
2437 use any symbol in the right segment; we just use
2438 the section symbol as it is convenient. (We
2439 cannot use the symbol given by "h" directly as it
2440 will not appear in the dynamic symbol table.) */
2441 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2442 BFD_ASSERT (symbol != 0);
2443 }
a16385dc
MM		 2444 else
2445 /* On SVR4-ish systems, the dynamic loader cannot
2446 relocate the text and data segments independently,
2447 so the symbol does not matter. */
2448 symbol = 0;
2449 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
252b5132 2450 }
f21f3fe0 2451
947216bf
AM		 2452 loc = sreloc->contents;
2453 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2454 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
9a5aca8c 2455
f21f3fe0 2456 /* If this reloc is against an external symbol, we do not want to
252b5132 2457 fiddle with the addend. Otherwise, we need to include the symbol
9b485d32 2458 value so that it becomes an addend for the dynamic reloc. */
252b5132
RH		 2459 if (! relocate)
2460 return bfd_reloc_ok;
9a5aca8c 2461
f21f3fe0 2462 return _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132
RH		 2463 contents, rel->r_offset, value,
2464 (bfd_vma) 0);
2465 }
2466 else switch (r_type)
2467 {
dfc5f959
NC		 2468#ifndef OLD_ARM_ABI
2469 case R_ARM_XPC25: /* Arm BLX instruction. */
5b5bb741
PB		 2470 case R_ARM_CALL:
2471 case R_ARM_JUMP24:
dfc5f959
NC		 2472#endif
2473 case R_ARM_PC24: /* Arm B/BL instruction */
7359ea65 2474 case R_ARM_PLT32:
dfc5f959
NC		 2475#ifndef OLD_ARM_ABI
2476 if (r_type == R_ARM_XPC25)
252b5132 2477 {
dfc5f959
NC		 2478 /* Check for Arm calling Arm function. */
2479 /* FIXME: Should we translate the instruction into a BL
2480 instruction instead ? */
2481 if (sym_flags != STT_ARM_TFUNC)
d003868e
AM		 2482 (*_bfd_error_handler)
2483 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2484 input_bfd,
2485 h ? h->root.root.string : "(local)");
dfc5f959
NC		 2486 }
2487 else
2488#endif
2489 {
2490 /* Check for Arm calling Thumb function. */
2491 if (sym_flags == STT_ARM_TFUNC)
2492 {
57e8b36a
NC		 2493 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2494 output_bfd, input_section,
2495 hit_data, sym_sec, rel->r_offset,
dfc5f959
NC		 2496 signed_addend, value);
2497 return bfd_reloc_ok;
2498 }
252b5132 2499 }
ba96a88f 2500
dea514f5
PB		 2501 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2502 where:
2503 S is the address of the symbol in the relocation.
2504 P is address of the instruction being relocated.
2505 A is the addend (extracted from the instruction) in bytes.
2506
2507 S is held in 'value'.
2508 P is the base address of the section containing the
2509 instruction plus the offset of the reloc into that
2510 section, ie:
2511 (input_section->output_section->vma +
2512 input_section->output_offset +
2513 rel->r_offset).
2514 A is the addend, converted into bytes, ie:
2515 (signed_addend * 4)
2516
2517 Note: None of these operations have knowledge of the pipeline
2518 size of the processor, thus it is up to the assembler to
2519 encode this information into the addend. */
2520 value -= (input_section->output_section->vma
2521 + input_section->output_offset);
2522 value -= rel->r_offset;
4e7fd91e
PB		 2523 if (globals->use_rel)
2524 value += (signed_addend << howto->size);
2525 else
2526 /* RELA addends do not have to be adjusted by howto->size. */
2527 value += signed_addend;
23080146 2528
dcb5e6e6
NC		 2529 signed_addend = value;
2530 signed_addend >>= howto->rightshift;
9a5aca8c 2531
59f2c4e7
NC		 2532 /* It is not an error for an undefined weak reference to be
2533 out of range. Any program that branches to such a symbol
9a5aca8c
AM		 2534 is going to crash anyway, so there is no point worrying
2535 about getting the destination exactly right. */
59f2c4e7
NC		 2536 if (! h || h->root.type != bfd_link_hash_undefweak)
2537 {
9b485d32 2538 /* Perform a signed range check. */
dcb5e6e6 2539 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
59f2c4e7
NC		 2540 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2541 return bfd_reloc_overflow;
2542 }
9a5aca8c 2543
dcb5e6e6
NC		 2544#ifndef OLD_ARM_ABI
2545 /* If necessary set the H bit in the BLX instruction. */
2546 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2547 value = (signed_addend & howto->dst_mask)
2548 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2549 | (1 << 24);
2550 else
2551#endif
2552 value = (signed_addend & howto->dst_mask)
2553 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
252b5132 2554 break;
f21f3fe0 2555
252b5132
RH		 2556 case R_ARM_ABS32:
2557 value += addend;
2558 if (sym_flags == STT_ARM_TFUNC)
2559 value |= 1;
2560 break;
f21f3fe0 2561
252b5132
RH		 2562 case R_ARM_REL32:
2563 value -= (input_section->output_section->vma
62efb346 2564 + input_section->output_offset + rel->r_offset);
252b5132
RH		 2565 value += addend;
2566 break;
eb043451
PB		 2567
2568#ifndef OLD_ARM_ABI
2569 case R_ARM_PREL31:
2570 value -= (input_section->output_section->vma
2571 + input_section->output_offset + rel->r_offset);
2572 value += signed_addend;
2573 if (! h || h->root.type != bfd_link_hash_undefweak)
2574 {
2575 /* Check for overflow */
2576 if ((value ^ (value >> 1)) & (1 << 30))
2577 return bfd_reloc_overflow;
2578 }
2579 value &= 0x7fffffff;
2580 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2581 if (sym_flags == STT_ARM_TFUNC)
2582 value |= 1;
2583 break;
2584#endif
252b5132 2585 }
f21f3fe0 2586
252b5132
RH		 2587 bfd_put_32 (input_bfd, value, hit_data);
2588 return bfd_reloc_ok;
2589
2590 case R_ARM_ABS8:
2591 value += addend;
2592 if ((long) value > 0x7f || (long) value < -0x80)
2593 return bfd_reloc_overflow;
2594
2595 bfd_put_8 (input_bfd, value, hit_data);
2596 return bfd_reloc_ok;
2597
2598 case R_ARM_ABS16:
2599 value += addend;
2600
2601 if ((long) value > 0x7fff || (long) value < -0x8000)
2602 return bfd_reloc_overflow;
2603
2604 bfd_put_16 (input_bfd, value, hit_data);
2605 return bfd_reloc_ok;
2606
2607 case R_ARM_ABS12:
2608 /* Support ldr and str instruction for the arm */
2609 /* Also thumb b (unconditional branch). ??? Really? */
2610 value += addend;
2611
2612 if ((long) value > 0x7ff || (long) value < -0x800)
2613 return bfd_reloc_overflow;
2614
2615 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2616 bfd_put_32 (input_bfd, value, hit_data);
2617 return bfd_reloc_ok;
2618
2619 case R_ARM_THM_ABS5:
9b485d32 2620 /* Support ldr and str instructions for the thumb. */
4e7fd91e
PB		 2621 if (globals->use_rel)
2622 {
2623 /* Need to refetch addend. */
2624 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2625 /* ??? Need to determine shift amount from operand size. */
2626 addend >>= howto->rightshift;
2627 }
252b5132
RH		 2628 value += addend;
2629
2630 /* ??? Isn't value unsigned? */
2631 if ((long) value > 0x1f || (long) value < -0x10)
2632 return bfd_reloc_overflow;
2633
2634 /* ??? Value needs to be properly shifted into place first. */
2635 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2636 bfd_put_16 (input_bfd, value, hit_data);
2637 return bfd_reloc_ok;
2638
dfc5f959
NC		 2639#ifndef OLD_ARM_ABI
2640 case R_ARM_THM_XPC22:
2641#endif
252b5132 2642 case R_ARM_THM_PC22:
dfc5f959 2643 /* Thumb BL (branch long instruction). */
252b5132 2644 {
b34976b6
AM		 2645 bfd_vma relocation;
2646 bfd_boolean overflow = FALSE;
2647 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2648 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
df212a7e 2649 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
ba96a88f 2650 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
b34976b6 2651 bfd_vma check;
252b5132 2652 bfd_signed_vma signed_check;
252b5132 2653
252b5132
RH		 2654 /* Need to refetch the addend and squish the two 11 bit pieces
2655 together. */
4e7fd91e
PB		 2656 if (globals->use_rel)
2657 {
2658 bfd_vma upper = upper_insn & 0x7ff;
2659 bfd_vma lower = lower_insn & 0x7ff;
2660 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2661 addend = (upper << 12) | (lower << 1);
2662 signed_addend = addend;
2663 }
dfc5f959
NC		 2664#ifndef OLD_ARM_ABI
2665 if (r_type == R_ARM_THM_XPC22)
2666 {
2667 /* Check for Thumb to Thumb call. */
2668 /* FIXME: Should we translate the instruction into a BL
2669 instruction instead ? */
2670 if (sym_flags == STT_ARM_TFUNC)
d003868e
AM		 2671 (*_bfd_error_handler)
2672 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2673 input_bfd,
2674 h ? h->root.root.string : "(local)");
dfc5f959
NC		 2675 }
2676 else
2677#endif
252b5132 2678 {
dfc5f959
NC		 2679 /* If it is not a call to Thumb, assume call to Arm.
2680 If it is a call relative to a section name, then it is not a
b7693d02
DJ		 2681 function call at all, but rather a long jump. Calls through
2682 the PLT do not require stubs. */
2683 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
2684 && (h == NULL || splt == NULL
2685 || h->plt.offset == (bfd_vma) -1))
dfc5f959
NC		 2686 {
2687 if (elf32_thumb_to_arm_stub
2688 (info, sym_name, input_bfd, output_bfd, input_section,
2689 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2690 return bfd_reloc_ok;
2691 else
2692 return bfd_reloc_dangerous;
2693 }
252b5132 2694 }
f21f3fe0 2695
b7693d02
DJ		 2696 /* Handle calls via the PLT. */
2697 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
2698 {
2699 value = (splt->output_section->vma
2700 + splt->output_offset
2701 + h->plt.offset);
2702 /* Target the Thumb stub before the ARM PLT entry. */
2703 value -= 4;
0945cdfd 2704 *unresolved_reloc_p = FALSE;
b7693d02
DJ		 2705 }
2706
ba96a88f 2707 relocation = value + signed_addend;
f21f3fe0 2708
252b5132 2709 relocation -= (input_section->output_section->vma
ba96a88f
NC		 2710 + input_section->output_offset
2711 + rel->r_offset);
9a5aca8c 2712
252b5132
RH		 2713 check = relocation >> howto->rightshift;
2714
2715 /* If this is a signed value, the rightshift just dropped
2716 leading 1 bits (assuming twos complement). */
2717 if ((bfd_signed_vma) relocation >= 0)
2718 signed_check = check;
2719 else
2720 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2721
252b5132 2722 /* Assumes two's complement. */
ba96a88f 2723 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
b34976b6 2724 overflow = TRUE;
252b5132 2725
df425bc0 2726#ifndef OLD_ARM_ABI
4f3c3dbb
NC		 2727 if (r_type == R_ARM_THM_XPC22
2728 && ((lower_insn & 0x1800) == 0x0800))
c62e1cc3
NC		 2729 /* For a BLX instruction, make sure that the relocation is rounded up
2730 to a word boundary. This follows the semantics of the instruction
2731 which specifies that bit 1 of the target address will come from bit
2732 1 of the base address. */
2733 relocation = (relocation + 2) & ~ 3;
99e4ae17 2734#endif
c62e1cc3
NC		 2735 /* Put RELOCATION back into the insn. */
2736 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
2737 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
2738
252b5132
RH		 2739 /* Put the relocated value back in the object file: */
2740 bfd_put_16 (input_bfd, upper_insn, hit_data);
2741 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
2742
2743 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
2744 }
2745 break;
2746
51c5503b 2747 case R_ARM_THM_PC11:
e37c699c 2748 case R_ARM_THM_PC9:
51c5503b
NC		 2749 /* Thumb B (branch) instruction). */
2750 {
6cf9e9fe 2751 bfd_signed_vma relocation;
51c5503b
NC		 2752 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
2753 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
51c5503b
NC		 2754 bfd_signed_vma signed_check;
2755
4e7fd91e 2756 if (globals->use_rel)
6cf9e9fe 2757 {
4e7fd91e
PB		 2758 /* Need to refetch addend. */
2759 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2760 if (addend & ((howto->src_mask + 1) >> 1))
2761 {
2762 signed_addend = -1;
2763 signed_addend &= ~ howto->src_mask;
2764 signed_addend |= addend;
2765 }
2766 else
2767 signed_addend = addend;
2768 /* The value in the insn has been right shifted. We need to
2769 undo this, so that we can perform the address calculation
2770 in terms of bytes. */
2771 signed_addend <<= howto->rightshift;
6cf9e9fe 2772 }
6cf9e9fe 2773 relocation = value + signed_addend;
51c5503b
NC		 2774
2775 relocation -= (input_section->output_section->vma
2776 + input_section->output_offset
2777 + rel->r_offset);
2778
6cf9e9fe
NC		 2779 relocation >>= howto->rightshift;
2780 signed_check = relocation;
2781 relocation &= howto->dst_mask;
51c5503b 2782 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
cedb70c5 2783
51c5503b
NC		 2784 bfd_put_16 (input_bfd, relocation, hit_data);
2785
2786 /* Assumes two's complement. */
2787 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2788 return bfd_reloc_overflow;
2789
2790 return bfd_reloc_ok;
2791 }
cedb70c5 2792
1f433d93 2793#ifndef OLD_ARM_ABI
8375c36b
PB		 2794 case R_ARM_ALU_PCREL7_0:
2795 case R_ARM_ALU_PCREL15_8:
2796 case R_ARM_ALU_PCREL23_15:
2797 {
2798 bfd_vma insn;
2799 bfd_vma relocation;
2800
2801 insn = bfd_get_32 (input_bfd, hit_data);
4e7fd91e
PB		 2802 if (globals->use_rel)
2803 {
2804 /* Extract the addend. */
2805 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
2806 signed_addend = addend;
2807 }
8375c36b
PB		 2808 relocation = value + signed_addend;
2809
2810 relocation -= (input_section->output_section->vma
2811 + input_section->output_offset
2812 + rel->r_offset);
2813 insn = (insn & ~0xfff)
2814 | ((howto->bitpos << 7) & 0xf00)
2815 | ((relocation >> howto->bitpos) & 0xff);
2816 bfd_put_32 (input_bfd, value, hit_data);
2817 }
2818 return bfd_reloc_ok;
1f433d93 2819#endif
8375c36b 2820
252b5132
RH		 2821 case R_ARM_GNU_VTINHERIT:
2822 case R_ARM_GNU_VTENTRY:
2823 return bfd_reloc_ok;
2824
2825 case R_ARM_COPY:
2826 return bfd_reloc_notsupported;
2827
2828 case R_ARM_GLOB_DAT:
2829 return bfd_reloc_notsupported;
2830
2831 case R_ARM_JUMP_SLOT:
2832 return bfd_reloc_notsupported;
2833
2834 case R_ARM_RELATIVE:
2835 return bfd_reloc_notsupported;
2836
2837 case R_ARM_GOTOFF:
2838 /* Relocation is relative to the start of the
2839 global offset table. */
2840
2841 BFD_ASSERT (sgot != NULL);
2842 if (sgot == NULL)
2843 return bfd_reloc_notsupported;
9a5aca8c 2844
cedb70c5 2845 /* If we are addressing a Thumb function, we need to adjust the
ee29b9fb
RE		 2846 address by one, so that attempts to call the function pointer will
2847 correctly interpret it as Thumb code. */
2848 if (sym_flags == STT_ARM_TFUNC)
2849 value += 1;
2850
252b5132
RH		 2851 /* Note that sgot->output_offset is not involved in this
2852 calculation. We always want the start of .got. If we
2853 define _GLOBAL_OFFSET_TABLE in a different way, as is
2854 permitted by the ABI, we might have to change this
9b485d32 2855 calculation. */
252b5132 2856 value -= sgot->output_section->vma;
f21f3fe0 2857 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 2858 contents, rel->r_offset, value,
2859 (bfd_vma) 0);
252b5132
RH		 2860
2861 case R_ARM_GOTPC:
a7c10850 2862 /* Use global offset table as symbol value. */
252b5132 2863 BFD_ASSERT (sgot != NULL);
f21f3fe0 2864
252b5132
RH		 2865 if (sgot == NULL)
2866 return bfd_reloc_notsupported;
2867
0945cdfd 2868 *unresolved_reloc_p = FALSE;
252b5132 2869 value = sgot->output_section->vma;
f21f3fe0 2870 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 2871 contents, rel->r_offset, value,
2872 (bfd_vma) 0);
f21f3fe0 2873
252b5132 2874 case R_ARM_GOT32:
eb043451
PB		 2875#ifndef OLD_ARM_ABI
2876 case R_ARM_GOT_PREL:
2877#endif
252b5132 2878 /* Relocation is to the entry for this symbol in the
9b485d32 2879 global offset table. */
252b5132
RH		 2880 if (sgot == NULL)
2881 return bfd_reloc_notsupported;
f21f3fe0 2882
252b5132
RH		 2883 if (h != NULL)
2884 {
2885 bfd_vma off;
5e681ec4 2886 bfd_boolean dyn;
f21f3fe0 2887
252b5132
RH		 2888 off = h->got.offset;
2889 BFD_ASSERT (off != (bfd_vma) -1);
5e681ec4 2890 dyn = globals->root.dynamic_sections_created;
f21f3fe0 2891
5e681ec4 2892 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
50d6c878 2893 || (info->shared
5e681ec4
PB		 2894 && SYMBOL_REFERENCES_LOCAL (info, h))
2895 || (ELF_ST_VISIBILITY (h->other)
2896 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2897 {
2898 /* This is actually a static link, or it is a -Bsymbolic link
2899 and the symbol is defined locally. We must initialize this
2900 entry in the global offset table. Since the offset must
2901 always be a multiple of 4, we use the least significant bit
2902 to record whether we have initialized it already.
f21f3fe0 2903
252b5132 2904 When doing a dynamic link, we create a .rel.got relocation
f21f3fe0 2905 entry to initialize the value. This is done in the
9b485d32 2906 finish_dynamic_symbol routine. */
252b5132
RH		 2907 if ((off & 1) != 0)
2908 off &= ~1;
2909 else
2910 {
ee29b9fb
RE		 2911 /* If we are addressing a Thumb function, we need to
2912 adjust the address by one, so that attempts to
2913 call the function pointer will correctly
2914 interpret it as Thumb code. */
2915 if (sym_flags == STT_ARM_TFUNC)
2916 value |= 1;
2917
252b5132
RH		 2918 bfd_put_32 (output_bfd, value, sgot->contents + off);
2919 h->got.offset |= 1;
2920 }
2921 }
0945cdfd
DJ		 2922 else
2923 *unresolved_reloc_p = FALSE;
f21f3fe0 2924
252b5132
RH		 2925 value = sgot->output_offset + off;
2926 }
2927 else
2928 {
2929 bfd_vma off;
f21f3fe0 2930
252b5132
RH		 2931 BFD_ASSERT (local_got_offsets != NULL &&
2932 local_got_offsets[r_symndx] != (bfd_vma) -1);
f21f3fe0 2933
252b5132 2934 off = local_got_offsets[r_symndx];
f21f3fe0 2935
252b5132
RH		 2936 /* The offset must always be a multiple of 4. We use the
2937 least significant bit to record whether we have already
9b485d32 2938 generated the necessary reloc. */
252b5132
RH		 2939 if ((off & 1) != 0)
2940 off &= ~1;
2941 else
2942 {
b7693d02
DJ		 2943 /* If we are addressing a Thumb function, we need to
2944 adjust the address by one, so that attempts to
2945 call the function pointer will correctly
2946 interpret it as Thumb code. */
2947 if (sym_flags == STT_ARM_TFUNC)
2948 value |= 1;
2949
252b5132 2950 bfd_put_32 (output_bfd, value, sgot->contents + off);
f21f3fe0 2951
252b5132
RH		 2952 if (info->shared)
2953 {
2954 asection * srelgot;
947216bf
AM		 2955 Elf_Internal_Rela outrel;
2956 bfd_byte *loc;
f21f3fe0 2957
252b5132
RH		 2958 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
2959 BFD_ASSERT (srelgot != NULL);
f21f3fe0 2960
252b5132 2961 outrel.r_offset = (sgot->output_section->vma
f21f3fe0 2962 + sgot->output_offset
252b5132
RH		 2963 + off);
2964 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
947216bf
AM		 2965 loc = srelgot->contents;
2966 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2967 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132 2968 }
f21f3fe0 2969
252b5132
RH		 2970 local_got_offsets[r_symndx] |= 1;
2971 }
f21f3fe0 2972
252b5132
RH		 2973 value = sgot->output_offset + off;
2974 }
eb043451
PB		 2975 if (r_type != R_ARM_GOT32)
2976 value += sgot->output_section->vma;
9a5aca8c 2977
f21f3fe0 2978 return _bfd_final_link_relocate (howto, input_bfd, input_section,
99e4ae17
AJ		 2979 contents, rel->r_offset, value,
2980 (bfd_vma) 0);
f21f3fe0 2981
252b5132
RH		 2982 case R_ARM_SBREL32:
2983 return bfd_reloc_notsupported;
2984
2985 case R_ARM_AMP_VCALL9:
2986 return bfd_reloc_notsupported;
2987
2988 case R_ARM_RSBREL32:
2989 return bfd_reloc_notsupported;
2990
2991 case R_ARM_THM_RPC22:
2992 return bfd_reloc_notsupported;
2993
2994 case R_ARM_RREL32:
2995 return bfd_reloc_notsupported;
2996
2997 case R_ARM_RABS32:
2998 return bfd_reloc_notsupported;
2999
3000 case R_ARM_RPC24:
3001 return bfd_reloc_notsupported;
3002
3003 case R_ARM_RBASE:
3004 return bfd_reloc_notsupported;
3005
319850b4
JB		 3006 case R_ARM_V4BX:
3007 if (globals->fix_v4bx)
3008 {
3009 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
3010
3011 /* Ensure that we have a BX instruction. */
3012 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
3013
3014 /* Preserve Rm (lowest four bits) and the condition code
3015 (highest four bits). Other bits encode MOV PC,Rm. */
3016 insn = (insn & 0xf000000f) | 0x01a0f000;
3017
3018 bfd_put_32 (input_bfd, insn, hit_data);
3019 }
3020 return bfd_reloc_ok;
3021
252b5132
RH		 3022 default:
3023 return bfd_reloc_notsupported;
3024 }
3025}
3026
98c1d4aa
NC		 3027/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
3028static void
57e8b36a
NC		 3029arm_add_to_rel (bfd * abfd,
3030 bfd_byte * address,
3031 reloc_howto_type * howto,
3032 bfd_signed_vma increment)
98c1d4aa 3033{
98c1d4aa
NC		 3034 bfd_signed_vma addend;
3035
9a5aca8c 3036 if (howto->type == R_ARM_THM_PC22)
98c1d4aa 3037 {
9a5aca8c
AM		 3038 int upper_insn, lower_insn;
3039 int upper, lower;
98c1d4aa 3040
9a5aca8c
AM		 3041 upper_insn = bfd_get_16 (abfd, address);
3042 lower_insn = bfd_get_16 (abfd, address + 2);
3043 upper = upper_insn & 0x7ff;
3044 lower = lower_insn & 0x7ff;
3045
3046 addend = (upper << 12) | (lower << 1);
ddda4409 3047 addend += increment;
9a5aca8c 3048 addend >>= 1;
98c1d4aa 3049
9a5aca8c
AM		 3050 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3051 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3052
dc810e39
AM		 3053 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3054 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
9a5aca8c
AM		 3055 }
3056 else
3057 {
3058 bfd_vma contents;
3059
3060 contents = bfd_get_32 (abfd, address);
3061
3062 /* Get the (signed) value from the instruction. */
3063 addend = contents & howto->src_mask;
3064 if (addend & ((howto->src_mask + 1) >> 1))
3065 {
3066 bfd_signed_vma mask;
3067
3068 mask = -1;
3069 mask &= ~ howto->src_mask;
3070 addend |= mask;
3071 }
3072
3073 /* Add in the increment, (which is a byte value). */
3074 switch (howto->type)
3075 {
3076 default:
3077 addend += increment;
3078 break;
3079
3080 case R_ARM_PC24:
5b5bb741
PB		 3081#ifndef OLD_ARM_ABI
3082 case R_ARM_CALL:
3083 case R_ARM_JUMP24:
3084#endif
9a5aca8c 3085 addend <<= howto->size;
dc810e39 3086 addend += increment;
9a5aca8c
AM		 3087
3088 /* Should we check for overflow here ? */
3089
3090 /* Drop any undesired bits. */
3091 addend >>= howto->rightshift;
3092 break;
3093 }
3094
3095 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3096
3097 bfd_put_32 (abfd, contents, address);
ddda4409 3098 }
98c1d4aa 3099}
252b5132
RH		 3100
3101/* Relocate an ARM ELF section. */
b34976b6 3102static bfd_boolean
57e8b36a
NC		 3103elf32_arm_relocate_section (bfd * output_bfd,
3104 struct bfd_link_info * info,
3105 bfd * input_bfd,
3106 asection * input_section,
3107 bfd_byte * contents,
3108 Elf_Internal_Rela * relocs,
3109 Elf_Internal_Sym * local_syms,
3110 asection ** local_sections)
252b5132 3111{
b34976b6
AM		 3112 Elf_Internal_Shdr *symtab_hdr;
3113 struct elf_link_hash_entry **sym_hashes;
3114 Elf_Internal_Rela *rel;
3115 Elf_Internal_Rela *relend;
3116 const char *name;
b32d3aa2 3117 struct elf32_arm_link_hash_table * globals;
252b5132 3118
4e7fd91e
PB		 3119 globals = elf32_arm_hash_table (info);
3120 if (info->relocatable && !globals->use_rel)
b34976b6 3121 return TRUE;
b491616a 3122
252b5132
RH		 3123 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3124 sym_hashes = elf_sym_hashes (input_bfd);
3125
3126 rel = relocs;
3127 relend = relocs + input_section->reloc_count;
3128 for (; rel < relend; rel++)
3129 {
ba96a88f
NC		 3130 int r_type;
3131 reloc_howto_type * howto;
3132 unsigned long r_symndx;
3133 Elf_Internal_Sym * sym;
3134 asection * sec;
252b5132 3135 struct elf_link_hash_entry * h;
ba96a88f
NC		 3136 bfd_vma relocation;
3137 bfd_reloc_status_type r;
3138 arelent bfd_reloc;
0945cdfd 3139 bfd_boolean unresolved_reloc = FALSE;
f21f3fe0 3140
252b5132 3141 r_symndx = ELF32_R_SYM (rel->r_info);
ba96a88f 3142 r_type = ELF32_R_TYPE (rel->r_info);
b32d3aa2 3143 r_type = arm_real_reloc_type (globals, r_type);
252b5132 3144
ba96a88f
NC		 3145 if ( r_type == R_ARM_GNU_VTENTRY
3146 || r_type == R_ARM_GNU_VTINHERIT)
252b5132
RH		 3147 continue;
3148
b32d3aa2 3149 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
ba96a88f 3150 howto = bfd_reloc.howto;
252b5132 3151
4e7fd91e 3152 if (info->relocatable && globals->use_rel)
252b5132 3153 {
1049f94e 3154 /* This is a relocatable link. We don't have to change
252b5132
RH		 3155 anything, unless the reloc is against a section symbol,
3156 in which case we have to adjust according to where the
3157 section symbol winds up in the output section. */
3158 if (r_symndx < symtab_hdr->sh_info)
3159 {
3160 sym = local_syms + r_symndx;
3161 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3162 {
3163 sec = local_sections[r_symndx];
98c1d4aa 3164 arm_add_to_rel (input_bfd, contents + rel->r_offset,
dc810e39
AM		 3165 howto,
3166 (bfd_signed_vma) (sec->output_offset
3167 + sym->st_value));
252b5132
RH		 3168 }
3169 }
3170
3171 continue;
3172 }
3173
3174 /* This is a final link. */
3175 h = NULL;
3176 sym = NULL;
3177 sec = NULL;
9b485d32 3178
252b5132
RH		 3179 if (r_symndx < symtab_hdr->sh_info)
3180 {
3181 sym = local_syms + r_symndx;
3182 sec = local_sections[r_symndx];
4e7fd91e 3183 if (globals->use_rel)
f8df10f4 3184 {
4e7fd91e
PB		 3185 relocation = (sec->output_section->vma
3186 + sec->output_offset
3187 + sym->st_value);
3188 if ((sec->flags & SEC_MERGE)
3189 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
f8df10f4 3190 {
4e7fd91e
PB		 3191 asection *msec;
3192 bfd_vma addend, value;
3193
3194 if (howto->rightshift)
3195 {
3196 (*_bfd_error_handler)
3197 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3198 input_bfd, input_section,
3199 (long) rel->r_offset, howto->name);
3200 return FALSE;
3201 }
f8df10f4 3202
4e7fd91e 3203 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
f8df10f4 3204
4e7fd91e
PB		 3205 /* Get the (signed) value from the instruction. */
3206 addend = value & howto->src_mask;
3207 if (addend & ((howto->src_mask + 1) >> 1))
3208 {
3209 bfd_signed_vma mask;
f8df10f4 3210
4e7fd91e
PB		 3211 mask = -1;
3212 mask &= ~ howto->src_mask;
3213 addend |= mask;
3214 }
3215 msec = sec;
3216 addend =
3217 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3218 - relocation;
3219 addend += msec->output_section->vma + msec->output_offset;
3220 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3221 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
f8df10f4 3222 }
f8df10f4 3223 }
4e7fd91e
PB		 3224 else
3225 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
252b5132
RH		 3226 }
3227 else
3228 {
560e09e9 3229 bfd_boolean warned;
560e09e9 3230
b2a8e766
AM		 3231 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3232 r_symndx, symtab_hdr, sym_hashes,
3233 h, sec, relocation,
3234 unresolved_reloc, warned);
252b5132
RH		 3235 }
3236
3237 if (h != NULL)
3238 name = h->root.root.string;
3239 else
3240 {
3241 name = (bfd_elf_string_from_elf_section
3242 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3243 if (name == NULL || *name == '\0')
3244 name = bfd_section_name (input_bfd, sec);
3245 }
f21f3fe0 3246
252b5132
RH		 3247 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3248 input_section, contents, rel,
3249 relocation, info, sec, name,
3250 (h ? ELF_ST_TYPE (h->type) :
0945cdfd
DJ		 3251 ELF_ST_TYPE (sym->st_info)), h,
3252 &unresolved_reloc);
3253
3254 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3255 because such sections are not SEC_ALLOC and thus ld.so will
3256 not process them. */
3257 if (unresolved_reloc
3258 && !((input_section->flags & SEC_DEBUGGING) != 0
3259 && h->def_dynamic))
3260 {
3261 (*_bfd_error_handler)
3262 (_("%B(%A+0x%lx): warning: unresolvable relocation %d against symbol `%s'"),
3263 input_bfd, input_section, (long) rel->r_offset,
3264 r_type, h->root.root.string);
3265 return FALSE;
3266 }
252b5132
RH		 3267
3268 if (r != bfd_reloc_ok)
3269 {
3270 const char * msg = (const char *) 0;
3271
3272 switch (r)
3273 {
3274 case bfd_reloc_overflow:
cf919dfd
PB		 3275 /* If the overflowing reloc was to an undefined symbol,
3276 we have already printed one error message and there
3277 is no point complaining again. */
3278 if ((! h ||
3279 h->root.type != bfd_link_hash_undefined)
3280 && (!((*info->callbacks->reloc_overflow)
dfeffb9f
L		 3281 (info, (h ? &h->root : NULL), name, howto->name,
3282 (bfd_vma) 0, input_bfd, input_section,
3283 rel->r_offset))))
b34976b6 3284 return FALSE;
252b5132
RH		 3285 break;
3286
3287 case bfd_reloc_undefined:
3288 if (!((*info->callbacks->undefined_symbol)
3289 (info, name, input_bfd, input_section,
b34976b6
AM		 3290 rel->r_offset, TRUE)))
3291 return FALSE;
252b5132
RH		 3292 break;
3293
3294 case bfd_reloc_outofrange:
9b485d32 3295 msg = _("internal error: out of range error");
252b5132
RH		 3296 goto common_error;
3297
3298 case bfd_reloc_notsupported:
9b485d32 3299 msg = _("internal error: unsupported relocation error");
252b5132
RH		 3300 goto common_error;
3301
3302 case bfd_reloc_dangerous:
9b485d32 3303 msg = _("internal error: dangerous error");
252b5132
RH		 3304 goto common_error;
3305
3306 default:
9b485d32 3307 msg = _("internal error: unknown error");
252b5132
RH		 3308 /* fall through */
3309
3310 common_error:
3311 if (!((*info->callbacks->warning)
3312 (info, msg, name, input_bfd, input_section,
3313 rel->r_offset)))
b34976b6 3314 return FALSE;
252b5132
RH		 3315 break;
3316 }
3317 }
3318 }
3319
b34976b6 3320 return TRUE;
252b5132
RH		 3321}
3322
c178919b
NC		 3323/* Set the right machine number. */
3324
3325static bfd_boolean
57e8b36a 3326elf32_arm_object_p (bfd *abfd)
c178919b 3327{
5a6c6817 3328 unsigned int mach;
57e8b36a 3329
5a6c6817 3330 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
c178919b 3331
5a6c6817
NC		 3332 if (mach != bfd_mach_arm_unknown)
3333 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3334
3335 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3336 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
e16bb312 3337
e16bb312 3338 else
5a6c6817 3339 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
c178919b
NC		 3340
3341 return TRUE;
3342}
3343
fc830a83 3344/* Function to keep ARM specific flags in the ELF header. */
3c9458e9 3345
b34976b6 3346static bfd_boolean
57e8b36a 3347elf32_arm_set_private_flags (bfd *abfd, flagword flags)
252b5132
RH		 3348{
3349 if (elf_flags_init (abfd)
3350 && elf_elfheader (abfd)->e_flags != flags)
3351 {
fc830a83
NC		 3352 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3353 {
fd2ec330 3354 if (flags & EF_ARM_INTERWORK)
d003868e
AM		 3355 (*_bfd_error_handler)
3356 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3357 abfd);
fc830a83 3358 else
d003868e
AM		 3359 _bfd_error_handler
3360 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3361 abfd);
fc830a83 3362 }
252b5132
RH		 3363 }
3364 else
3365 {
3366 elf_elfheader (abfd)->e_flags = flags;
b34976b6 3367 elf_flags_init (abfd) = TRUE;
252b5132
RH		 3368 }
3369
b34976b6 3370 return TRUE;
252b5132
RH		 3371}
3372
fc830a83 3373/* Copy backend specific data from one object module to another. */
9b485d32 3374
b34976b6 3375static bfd_boolean
57e8b36a 3376elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
252b5132
RH		 3377{
3378 flagword in_flags;
3379 flagword out_flags;
3380
fc830a83 3381 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
252b5132 3382 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 3383 return TRUE;
252b5132 3384
fc830a83 3385 in_flags = elf_elfheader (ibfd)->e_flags;
252b5132
RH		 3386 out_flags = elf_elfheader (obfd)->e_flags;
3387
fc830a83
NC		 3388 if (elf_flags_init (obfd)
3389 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3390 && in_flags != out_flags)
252b5132 3391 {
252b5132 3392 /* Cannot mix APCS26 and APCS32 code. */
fd2ec330 3393 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
b34976b6 3394 return FALSE;
252b5132
RH		 3395
3396 /* Cannot mix float APCS and non-float APCS code. */
fd2ec330 3397 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
b34976b6 3398 return FALSE;
252b5132
RH		 3399
3400 /* If the src and dest have different interworking flags
3401 then turn off the interworking bit. */
fd2ec330 3402 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
252b5132 3403 {
fd2ec330 3404 if (out_flags & EF_ARM_INTERWORK)
d003868e
AM		 3405 _bfd_error_handler
3406 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3407 obfd, ibfd);
252b5132 3408
fd2ec330 3409 in_flags &= ~EF_ARM_INTERWORK;
252b5132 3410 }
1006ba19
PB		 3411
3412 /* Likewise for PIC, though don't warn for this case. */
fd2ec330
PB		 3413 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3414 in_flags &= ~EF_ARM_PIC;
252b5132
RH		 3415 }
3416
3417 elf_elfheader (obfd)->e_flags = in_flags;
b34976b6 3418 elf_flags_init (obfd) = TRUE;
252b5132 3419
94a3258f
PB		 3420 /* Also copy the EI_OSABI field. */
3421 elf_elfheader (obfd)->e_ident[EI_OSABI] =
3422 elf_elfheader (ibfd)->e_ident[EI_OSABI];
3423
b34976b6 3424 return TRUE;
252b5132
RH		 3425}
3426
3427/* Merge backend specific data from an object file to the output
3428 object file when linking. */
9b485d32 3429
b34976b6 3430static bfd_boolean
57e8b36a 3431elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
252b5132
RH		 3432{
3433 flagword out_flags;
3434 flagword in_flags;
b34976b6 3435 bfd_boolean flags_compatible = TRUE;
cf919dfd 3436 asection *sec;
252b5132 3437
9b485d32 3438 /* Check if we have the same endianess. */
82e51918 3439 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
b34976b6 3440 return FALSE;
1fe494a5 3441
252b5132
RH		 3442 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3443 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
b34976b6 3444 return TRUE;
252b5132 3445
252b5132
RH		 3446 /* The input BFD must have had its flags initialised. */
3447 /* The following seems bogus to me -- The flags are initialized in
3448 the assembler but I don't think an elf_flags_init field is
9b485d32 3449 written into the object. */
252b5132
RH		 3450 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3451
3452 in_flags = elf_elfheader (ibfd)->e_flags;
3453 out_flags = elf_elfheader (obfd)->e_flags;
3454
3455 if (!elf_flags_init (obfd))
3456 {
fe077fa6
NC		 3457 /* If the input is the default architecture and had the default
3458 flags then do not bother setting the flags for the output
3459 architecture, instead allow future merges to do this. If no
3460 future merges ever set these flags then they will retain their
3461 uninitialised values, which surprise surprise, correspond
252b5132 3462 to the default values. */
fe077fa6
NC		 3463 if (bfd_get_arch_info (ibfd)->the_default
3464 && elf_elfheader (ibfd)->e_flags == 0)
b34976b6 3465 return TRUE;
252b5132 3466
b34976b6 3467 elf_flags_init (obfd) = TRUE;
252b5132
RH		 3468 elf_elfheader (obfd)->e_flags = in_flags;
3469
3470 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3471 && bfd_get_arch_info (obfd)->the_default)
3472 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3473
b34976b6 3474 return TRUE;
252b5132
RH		 3475 }
3476
5a6c6817
NC		 3477 /* Determine what should happen if the input ARM architecture
3478 does not match the output ARM architecture. */
3479 if (! bfd_arm_merge_machines (ibfd, obfd))
3480 return FALSE;
e16bb312 3481
1006ba19 3482 /* Identical flags must be compatible. */
252b5132 3483 if (in_flags == out_flags)
b34976b6 3484 return TRUE;
252b5132 3485
35a0f415
DJ		 3486 /* Check to see if the input BFD actually contains any sections. If
3487 not, its flags may not have been initialised either, but it
3488 cannot actually cause any incompatibility. Do not short-circuit
3489 dynamic objects; their section list may be emptied by
d1f161ea 3490 elf_link_add_object_symbols.
35a0f415 3491
d1f161ea
NC		 3492 Also check to see if there are no code sections in the input.
3493 In this case there is no need to check for code specific flags.
3494 XXX - do we need to worry about floating-point format compatability
3495 in data sections ? */
35a0f415 3496 if (!(ibfd->flags & DYNAMIC))
cf919dfd 3497 {
35a0f415 3498 bfd_boolean null_input_bfd = TRUE;
d1f161ea 3499 bfd_boolean only_data_sections = TRUE;
35a0f415
DJ		 3500
3501 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
cf919dfd 3502 {
35a0f415
DJ		 3503 /* Ignore synthetic glue sections. */
3504 if (strcmp (sec->name, ".glue_7")
3505 && strcmp (sec->name, ".glue_7t"))
3506 {
d1f161ea
NC		 3507 if ((bfd_get_section_flags (ibfd, sec)
3508 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3509 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3510 only_data_sections = FALSE;
3511
35a0f415
DJ		 3512 null_input_bfd = FALSE;
3513 break;
3514 }
cf919dfd 3515 }
d1f161ea
NC		 3516
3517 if (null_input_bfd || only_data_sections)
35a0f415 3518 return TRUE;
cf919dfd 3519 }
cf919dfd 3520
252b5132 3521 /* Complain about various flag mismatches. */
fc830a83
NC		 3522 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
3523 {
d003868e 3524 _bfd_error_handler
3656d5e3 3525 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
d003868e
AM		 3526 ibfd, obfd,
3527 (in_flags & EF_ARM_EABIMASK) >> 24,
3528 (out_flags & EF_ARM_EABIMASK) >> 24);
b34976b6 3529 return FALSE;
fc830a83 3530 }
252b5132 3531
1006ba19
PB		 3532 /* Not sure what needs to be checked for EABI versions >= 1. */
3533 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
3534 {
fd2ec330 3535 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
1006ba19 3536 {
d003868e
AM		 3537 _bfd_error_handler
3538 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
3539 ibfd, obfd,
3540 in_flags & EF_ARM_APCS_26 ? 26 : 32,
3541 out_flags & EF_ARM_APCS_26 ? 26 : 32);
b34976b6 3542 flags_compatible = FALSE;
1006ba19 3543 }
252b5132 3544
fd2ec330 3545 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
1006ba19 3546 {
5eefb65f 3547 if (in_flags & EF_ARM_APCS_FLOAT)
d003868e
AM		 3548 _bfd_error_handler
3549 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
3550 ibfd, obfd);
5eefb65f 3551 else
d003868e
AM		 3552 _bfd_error_handler
3553 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
3554 ibfd, obfd);
63b0f745 3555
b34976b6 3556 flags_compatible = FALSE;
1006ba19 3557 }
252b5132 3558
96a846ea 3559 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
1006ba19 3560 {
96a846ea 3561 if (in_flags & EF_ARM_VFP_FLOAT)
d003868e
AM		 3562 _bfd_error_handler
3563 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
3564 ibfd, obfd);
5eefb65f 3565 else
d003868e
AM		 3566 _bfd_error_handler
3567 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
3568 ibfd, obfd);
fde78edd
NC		 3569
3570 flags_compatible = FALSE;
3571 }
3572
3573 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
3574 {
3575 if (in_flags & EF_ARM_MAVERICK_FLOAT)
d003868e
AM		 3576 _bfd_error_handler
3577 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
3578 ibfd, obfd);
fde78edd 3579 else
d003868e
AM		 3580 _bfd_error_handler
3581 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
3582 ibfd, obfd);
63b0f745 3583
b34976b6 3584 flags_compatible = FALSE;
1006ba19 3585 }
96a846ea
RE		 3586
3587#ifdef EF_ARM_SOFT_FLOAT
3588 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
3589 {
3590 /* We can allow interworking between code that is VFP format
3591 layout, and uses either soft float or integer regs for
3592 passing floating point arguments and results. We already
3593 know that the APCS_FLOAT flags match; similarly for VFP
3594 flags. */
3595 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
3596 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
3597 {
3598 if (in_flags & EF_ARM_SOFT_FLOAT)
d003868e
AM		 3599 _bfd_error_handler
3600 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
3601 ibfd, obfd);
96a846ea 3602 else
d003868e
AM		 3603 _bfd_error_handler
3604 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
3605 ibfd, obfd);
96a846ea 3606
b34976b6 3607 flags_compatible = FALSE;
96a846ea
RE		 3608 }
3609 }
ee43f35e 3610#endif
252b5132 3611
1006ba19 3612 /* Interworking mismatch is only a warning. */
fd2ec330 3613 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8f615d07 3614 {
e3c8793a
NC		 3615 if (in_flags & EF_ARM_INTERWORK)
3616 {
d003868e
AM		 3617 _bfd_error_handler
3618 (_("Warning: %B supports interworking, whereas %B does not"),
3619 ibfd, obfd);
e3c8793a
NC		 3620 }
3621 else
3622 {
d003868e
AM		 3623 _bfd_error_handler
3624 (_("Warning: %B does not support interworking, whereas %B does"),
3625 ibfd, obfd);
e3c8793a 3626 }
8f615d07 3627 }
252b5132 3628 }
63b0f745 3629
1006ba19 3630 return flags_compatible;
252b5132
RH		 3631}
3632
9b485d32
NC		 3633/* Display the flags field. */
3634
b34976b6 3635static bfd_boolean
57e8b36a 3636elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
252b5132 3637{
fc830a83
NC		 3638 FILE * file = (FILE *) ptr;
3639 unsigned long flags;
252b5132
RH		 3640
3641 BFD_ASSERT (abfd != NULL && ptr != NULL);
3642
3643 /* Print normal ELF private data. */
3644 _bfd_elf_print_private_bfd_data (abfd, ptr);
3645
fc830a83 3646 flags = elf_elfheader (abfd)->e_flags;
9b485d32
NC		 3647 /* Ignore init flag - it may not be set, despite the flags field
3648 containing valid data. */
252b5132
RH		 3649
3650 /* xgettext:c-format */
9b485d32 3651 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
252b5132 3652
fc830a83
NC		 3653 switch (EF_ARM_EABI_VERSION (flags))
3654 {
3655 case EF_ARM_EABI_UNKNOWN:
4cc11e76 3656 /* The following flag bits are GNU extensions and not part of the
fc830a83
NC		 3657 official ARM ELF extended ABI. Hence they are only decoded if
3658 the EABI version is not set. */
fd2ec330 3659 if (flags & EF_ARM_INTERWORK)
9b485d32 3660 fprintf (file, _(" [interworking enabled]"));
9a5aca8c 3661
fd2ec330 3662 if (flags & EF_ARM_APCS_26)
6c571f00 3663 fprintf (file, " [APCS-26]");
fc830a83 3664 else
6c571f00 3665 fprintf (file, " [APCS-32]");
9a5aca8c 3666
96a846ea
RE		 3667 if (flags & EF_ARM_VFP_FLOAT)
3668 fprintf (file, _(" [VFP float format]"));
fde78edd
NC		 3669 else if (flags & EF_ARM_MAVERICK_FLOAT)
3670 fprintf (file, _(" [Maverick float format]"));
96a846ea
RE		 3671 else
3672 fprintf (file, _(" [FPA float format]"));
3673
fd2ec330 3674 if (flags & EF_ARM_APCS_FLOAT)
9b485d32 3675 fprintf (file, _(" [floats passed in float registers]"));
9a5aca8c 3676
fd2ec330 3677 if (flags & EF_ARM_PIC)
9b485d32 3678 fprintf (file, _(" [position independent]"));
fc830a83 3679
fd2ec330 3680 if (flags & EF_ARM_NEW_ABI)
9b485d32 3681 fprintf (file, _(" [new ABI]"));
9a5aca8c 3682
fd2ec330 3683 if (flags & EF_ARM_OLD_ABI)
9b485d32 3684 fprintf (file, _(" [old ABI]"));
9a5aca8c 3685
fd2ec330 3686 if (flags & EF_ARM_SOFT_FLOAT)
9b485d32 3687 fprintf (file, _(" [software FP]"));
9a5aca8c 3688
96a846ea
RE		 3689 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
3690 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
fde78edd
NC		 3691 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
3692 | EF_ARM_MAVERICK_FLOAT);
fc830a83 3693 break;
9a5aca8c 3694
fc830a83 3695 case EF_ARM_EABI_VER1:
9b485d32 3696 fprintf (file, _(" [Version1 EABI]"));
9a5aca8c 3697
fc830a83 3698 if (flags & EF_ARM_SYMSARESORTED)
9b485d32 3699 fprintf (file, _(" [sorted symbol table]"));
fc830a83 3700 else
9b485d32 3701 fprintf (file, _(" [unsorted symbol table]"));
9a5aca8c 3702
fc830a83
NC		 3703 flags &= ~ EF_ARM_SYMSARESORTED;
3704 break;
9a5aca8c 3705
fd2ec330
PB		 3706 case EF_ARM_EABI_VER2:
3707 fprintf (file, _(" [Version2 EABI]"));
3708
3709 if (flags & EF_ARM_SYMSARESORTED)
3710 fprintf (file, _(" [sorted symbol table]"));
3711 else
3712 fprintf (file, _(" [unsorted symbol table]"));
3713
3714 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
3715 fprintf (file, _(" [dynamic symbols use segment index]"));
3716
3717 if (flags & EF_ARM_MAPSYMSFIRST)
3718 fprintf (file, _(" [mapping symbols precede others]"));
3719
99e4ae17 3720 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
fd2ec330
PB		 3721 | EF_ARM_MAPSYMSFIRST);
3722 break;
3723
d507cf36
PB		 3724 case EF_ARM_EABI_VER3:
3725 fprintf (file, _(" [Version3 EABI]"));
8cb51566
PB		 3726 break;
3727
3728 case EF_ARM_EABI_VER4:
3729 fprintf (file, _(" [Version4 EABI]"));
d507cf36
PB		 3730
3731 if (flags & EF_ARM_BE8)
3732 fprintf (file, _(" [BE8]"));
3733
3734 if (flags & EF_ARM_LE8)
3735 fprintf (file, _(" [LE8]"));
3736
3737 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
3738 break;
3739
fc830a83 3740 default:
9b485d32 3741 fprintf (file, _(" <EABI version unrecognised>"));
fc830a83
NC		 3742 break;
3743 }
252b5132 3744
fc830a83 3745 flags &= ~ EF_ARM_EABIMASK;
252b5132 3746
fc830a83 3747 if (flags & EF_ARM_RELEXEC)
9b485d32 3748 fprintf (file, _(" [relocatable executable]"));
252b5132 3749
fc830a83 3750 if (flags & EF_ARM_HASENTRY)
9b485d32 3751 fprintf (file, _(" [has entry point]"));
252b5132 3752
fc830a83
NC		 3753 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
3754
3755 if (flags)
9b485d32 3756 fprintf (file, _("<Unrecognised flag bits set>"));
9a5aca8c 3757
252b5132
RH		 3758 fputc ('\n', file);
3759
b34976b6 3760 return TRUE;
252b5132
RH		 3761}
3762
3763static int
57e8b36a 3764elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
252b5132 3765{
2f0ca46a
NC		 3766 switch (ELF_ST_TYPE (elf_sym->st_info))
3767 {
3768 case STT_ARM_TFUNC:
3769 return ELF_ST_TYPE (elf_sym->st_info);
ce855c42 3770
2f0ca46a
NC		 3771 case STT_ARM_16BIT:
3772 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
3773 This allows us to distinguish between data used by Thumb instructions
3774 and non-data (which is probably code) inside Thumb regions of an
3775 executable. */
3776 if (type != STT_OBJECT)
3777 return ELF_ST_TYPE (elf_sym->st_info);
3778 break;
9a5aca8c 3779
ce855c42
NC		 3780 default:
3781 break;
2f0ca46a
NC		 3782 }
3783
3784 return type;
252b5132 3785}
f21f3fe0 3786
252b5132 3787static asection *
57e8b36a
NC		 3788elf32_arm_gc_mark_hook (asection * sec,
3789 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3790 Elf_Internal_Rela * rel,
3791 struct elf_link_hash_entry * h,
3792 Elf_Internal_Sym * sym)
252b5132
RH		 3793{
3794 if (h != NULL)
3795 {
3796 switch (ELF32_R_TYPE (rel->r_info))
3797 {
3798 case R_ARM_GNU_VTINHERIT:
3799 case R_ARM_GNU_VTENTRY:
3800 break;
3801
3802 default:
3803 switch (h->root.type)
3804 {
3805 case bfd_link_hash_defined:
3806 case bfd_link_hash_defweak:
3807 return h->root.u.def.section;
3808
3809 case bfd_link_hash_common:
3810 return h->root.u.c.p->section;
e049a0de
ILT		 3811
3812 default:
3813 break;
252b5132
RH		 3814 }
3815 }
3816 }
3817 else
1e2f5b6e 3818 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
9ad5cbcf 3819
252b5132
RH		 3820 return NULL;
3821}
3822
780a67af
NC		 3823/* Update the got entry reference counts for the section being removed. */
3824
b34976b6 3825static bfd_boolean
57e8b36a
NC		 3826elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
3827 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3828 asection * sec ATTRIBUTE_UNUSED,
3829 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
252b5132 3830{
5e681ec4
PB		 3831 Elf_Internal_Shdr *symtab_hdr;
3832 struct elf_link_hash_entry **sym_hashes;
3833 bfd_signed_vma *local_got_refcounts;
3834 const Elf_Internal_Rela *rel, *relend;
eb043451
PB		 3835 struct elf32_arm_link_hash_table * globals;
3836
3837 globals = elf32_arm_hash_table (info);
5e681ec4
PB		 3838
3839 elf_section_data (sec)->local_dynrel = NULL;
3840
3841 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3842 sym_hashes = elf_sym_hashes (abfd);
3843 local_got_refcounts = elf_local_got_refcounts (abfd);
3844
3845 relend = relocs + sec->reloc_count;
3846 for (rel = relocs; rel < relend; rel++)
eb043451 3847 {
3eb128b2
AM		 3848 unsigned long r_symndx;
3849 struct elf_link_hash_entry *h = NULL;
eb043451 3850 int r_type;
5e681ec4 3851
3eb128b2
AM		 3852 r_symndx = ELF32_R_SYM (rel->r_info);
3853 if (r_symndx >= symtab_hdr->sh_info)
3854 {
3855 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3856 while (h->root.type == bfd_link_hash_indirect
3857 || h->root.type == bfd_link_hash_warning)
3858 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3859 }
3860
eb043451 3861 r_type = ELF32_R_TYPE (rel->r_info);
b6ee372a 3862#ifndef OLD_ARM_ABI
eb043451 3863 r_type = arm_real_reloc_type (globals, r_type);
b6ee372a 3864#endif
eb043451
PB		 3865 switch (r_type)
3866 {
3867 case R_ARM_GOT32:
3868#ifndef OLD_ARM_ABI
3869 case R_ARM_GOT_PREL:
3870#endif
3eb128b2 3871 if (h != NULL)
eb043451 3872 {
eb043451
PB		 3873 if (h->got.refcount > 0)
3874 h->got.refcount -= 1;
3875 }
3876 else if (local_got_refcounts != NULL)
3877 {
3878 if (local_got_refcounts[r_symndx] > 0)
3879 local_got_refcounts[r_symndx] -= 1;
3880 }
3881 break;
3882
3883 case R_ARM_ABS32:
3884 case R_ARM_REL32:
3885 case R_ARM_PC24:
3886 case R_ARM_PLT32:
3887#ifndef OLD_ARM_ABI
5b5bb741
PB		 3888 case R_ARM_CALL:
3889 case R_ARM_JUMP24:
eb043451
PB		 3890 case R_ARM_PREL31:
3891#endif
b7693d02
DJ		 3892 case R_ARM_THM_PC22:
3893 /* Should the interworking branches be here also? */
3894
3eb128b2 3895 if (h != NULL)
eb043451
PB		 3896 {
3897 struct elf32_arm_link_hash_entry *eh;
3898 struct elf32_arm_relocs_copied **pp;
3899 struct elf32_arm_relocs_copied *p;
5e681ec4 3900
b7693d02 3901 eh = (struct elf32_arm_link_hash_entry *) h;
5e681ec4 3902
eb043451 3903 if (h->plt.refcount > 0)
b7693d02
DJ		 3904 {
3905 h->plt.refcount -= 1;
3906 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22)
3907 eh->plt_thumb_refcount--;
3908 }
5e681ec4 3909
eb043451 3910 if (r_type == R_ARM_ABS32
eb043451
PB		 3911 || r_type == R_ARM_REL32)
3912 {
eb043451
PB		 3913 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
3914 pp = &p->next)
3915 if (p->section == sec)
3916 {
3917 p->count -= 1;
3918 if (p->count == 0)
3919 *pp = p->next;
3920 break;
3921 }
3922 }
3923 }
3924 break;
5e681ec4 3925
eb043451
PB		 3926 default:
3927 break;
3928 }
3929 }
5e681ec4 3930
b34976b6 3931 return TRUE;
252b5132
RH		 3932}
3933
780a67af
NC		 3934/* Look through the relocs for a section during the first phase. */
3935
b34976b6 3936static bfd_boolean
57e8b36a
NC		 3937elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
3938 asection *sec, const Elf_Internal_Rela *relocs)
252b5132 3939{
b34976b6
AM		 3940 Elf_Internal_Shdr *symtab_hdr;
3941 struct elf_link_hash_entry **sym_hashes;
3942 struct elf_link_hash_entry **sym_hashes_end;
3943 const Elf_Internal_Rela *rel;
3944 const Elf_Internal_Rela *rel_end;
3945 bfd *dynobj;
5e681ec4 3946 asection *sreloc;
b34976b6 3947 bfd_vma *local_got_offsets;
5e681ec4 3948 struct elf32_arm_link_hash_table *htab;
9a5aca8c 3949
1049f94e 3950 if (info->relocatable)
b34976b6 3951 return TRUE;
9a5aca8c 3952
5e681ec4
PB		 3953 htab = elf32_arm_hash_table (info);
3954 sreloc = NULL;
9a5aca8c 3955
67687978
PB		 3956 /* Create dynamic sections for relocatable executables so that we can
3957 copy relocations. */
3958 if (htab->root.is_relocatable_executable
3959 && ! htab->root.dynamic_sections_created)
3960 {
3961 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
3962 return FALSE;
3963 }
3964
252b5132
RH		 3965 dynobj = elf_hash_table (info)->dynobj;
3966 local_got_offsets = elf_local_got_offsets (abfd);
f21f3fe0 3967
252b5132
RH		 3968 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3969 sym_hashes = elf_sym_hashes (abfd);
9b485d32
NC		 3970 sym_hashes_end = sym_hashes
3971 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
3972
252b5132
RH		 3973 if (!elf_bad_symtab (abfd))
3974 sym_hashes_end -= symtab_hdr->sh_info;
9b485d32 3975
252b5132
RH		 3976 rel_end = relocs + sec->reloc_count;
3977 for (rel = relocs; rel < rel_end; rel++)
3978 {
3979 struct elf_link_hash_entry *h;
b7693d02 3980 struct elf32_arm_link_hash_entry *eh;
252b5132 3981 unsigned long r_symndx;
eb043451 3982 int r_type;
9a5aca8c 3983
252b5132 3984 r_symndx = ELF32_R_SYM (rel->r_info);
eb043451
PB		 3985 r_type = ELF32_R_TYPE (rel->r_info);
3986#ifndef OLD_ARM_ABI
3987 r_type = arm_real_reloc_type (htab, r_type);
3988#endif
252b5132
RH		 3989 if (r_symndx < symtab_hdr->sh_info)
3990 h = NULL;
3991 else
3992 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9a5aca8c 3993
b7693d02
DJ		 3994 eh = (struct elf32_arm_link_hash_entry *) h;
3995
eb043451 3996 switch (r_type)
252b5132 3997 {
5e681ec4 3998 case R_ARM_GOT32:
eb043451
PB		 3999#ifndef OLD_ARM_ABI
4000 case R_ARM_GOT_PREL:
4001#endif
5e681ec4 4002 /* This symbol requires a global offset table entry. */
252b5132
RH		 4003 if (h != NULL)
4004 {
5e681ec4 4005 h->got.refcount++;
252b5132
RH		 4006 }
4007 else
4008 {
5e681ec4
PB		 4009 bfd_signed_vma *local_got_refcounts;
4010
4011 /* This is a global offset table entry for a local symbol. */
4012 local_got_refcounts = elf_local_got_refcounts (abfd);
4013 if (local_got_refcounts == NULL)
252b5132 4014 {
dc810e39 4015 bfd_size_type size;
252b5132 4016
dc810e39 4017 size = symtab_hdr->sh_info;
57e8b36a
NC		 4018 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4019 local_got_refcounts = bfd_zalloc (abfd, size);
5e681ec4 4020 if (local_got_refcounts == NULL)
b34976b6 4021 return FALSE;
5e681ec4 4022 elf_local_got_refcounts (abfd) = local_got_refcounts;
252b5132 4023 }
5e681ec4 4024 local_got_refcounts[r_symndx] += 1;
252b5132 4025 }
eb043451
PB		 4026 if (r_type == R_ARM_GOT32)
4027 break;
4028 /* Fall through. */
252b5132 4029
5e681ec4
PB		 4030 case R_ARM_GOTOFF:
4031 case R_ARM_GOTPC:
4032 if (htab->sgot == NULL)
4033 {
4034 if (htab->root.dynobj == NULL)
4035 htab->root.dynobj = abfd;
4036 if (!create_got_section (htab->root.dynobj, info))
4037 return FALSE;
4038 }
252b5132
RH		 4039 break;
4040
4041 case R_ARM_ABS32:
4042 case R_ARM_REL32:
4043 case R_ARM_PC24:
7359ea65 4044 case R_ARM_PLT32:
eb043451 4045#ifndef OLD_ARM_ABI
5b5bb741
PB		 4046 case R_ARM_CALL:
4047 case R_ARM_JUMP24:
eb043451
PB		 4048 case R_ARM_PREL31:
4049#endif
b7693d02
DJ		 4050 case R_ARM_THM_PC22:
4051 /* Should the interworking branches be listed here? */
7359ea65 4052 if (h != NULL)
5e681ec4
PB		 4053 {
4054 /* If this reloc is in a read-only section, we might
4055 need a copy reloc. We can't check reliably at this
4056 stage whether the section is read-only, as input
4057 sections have not yet been mapped to output sections.
4058 Tentatively set the flag for now, and correct in
4059 adjust_dynamic_symbol. */
7359ea65 4060 if (!info->shared)
f5385ebf 4061 h->non_got_ref = 1;
7359ea65 4062
5e681ec4 4063 /* We may need a .plt entry if the function this reloc
c84cd8ee
DJ		 4064 refers to is in a different object. We can't tell for
4065 sure yet, because something later might force the
4066 symbol local. */
eb043451 4067 if (r_type == R_ARM_PC24
5b5bb741
PB		 4068#ifndef OLD_ARM_ABI
4069 || r_type == R_ARM_CALL
4070 || r_type == R_ARM_JUMP24
ee06dc07 4071 || r_type == R_ARM_PREL31
5b5bb741 4072#endif
b7693d02
DJ		 4073 || r_type == R_ARM_PLT32
4074 || r_type == R_ARM_THM_PC22)
f5385ebf 4075 h->needs_plt = 1;
4f199be3
DJ		 4076
4077 /* If we create a PLT entry, this relocation will reference
4078 it, even if it's an ABS32 relocation. */
4079 h->plt.refcount += 1;
b7693d02
DJ		 4080
4081 if (r_type == R_ARM_THM_PC22)
4082 eh->plt_thumb_refcount += 1;
5e681ec4
PB		 4083 }
4084
67687978
PB		 4085 /* If we are creating a shared library or relocatable executable,
4086 and this is a reloc against a global symbol, or a non PC
4087 relative reloc against a local symbol, then we need to copy
4088 the reloc into the shared library. However, if we are linking
4089 with -Bsymbolic, we do not need to copy a reloc against a
252b5132
RH		 4090 global symbol which is defined in an object we are
4091 including in the link (i.e., DEF_REGULAR is set). At
4092 this point we have not seen all the input files, so it is
4093 possible that DEF_REGULAR is not set now but will be set
4094 later (it is never cleared). We account for that
4095 possibility below by storing information in the
5e681ec4 4096 relocs_copied field of the hash table entry. */
67687978 4097 if ((info->shared || htab->root.is_relocatable_executable)
5e681ec4 4098 && (sec->flags & SEC_ALLOC) != 0
eb043451
PB		 4099 && ((r_type != R_ARM_PC24
4100 && r_type != R_ARM_PLT32
b6ee372a 4101#ifndef OLD_ARM_ABI
5b5bb741
PB		 4102 && r_type != R_ARM_CALL
4103 && r_type != R_ARM_JUMP24
eb043451 4104 && r_type != R_ARM_PREL31
b6ee372a 4105#endif
b7693d02
DJ		 4106 && r_type != R_ARM_REL32
4107 && r_type != R_ARM_THM_PC22)
5e681ec4
PB		 4108 || (h != NULL
4109 && (! info->symbolic
f5385ebf 4110 || !h->def_regular))))
252b5132 4111 {
5e681ec4
PB		 4112 struct elf32_arm_relocs_copied *p, **head;
4113
252b5132
RH		 4114 /* When creating a shared object, we must copy these
4115 reloc types into the output file. We create a reloc
4116 section in dynobj and make room for this reloc. */
4117 if (sreloc == NULL)
4118 {
4119 const char * name;
4120
4121 name = (bfd_elf_string_from_elf_section
4122 (abfd,
4123 elf_elfheader (abfd)->e_shstrndx,
4124 elf_section_data (sec)->rel_hdr.sh_name));
4125 if (name == NULL)
b34976b6 4126 return FALSE;
252b5132
RH		 4127
4128 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
99e4ae17 4129 && strcmp (bfd_get_section_name (abfd, sec),
252b5132
RH		 4130 name + 4) == 0);
4131
4132 sreloc = bfd_get_section_by_name (dynobj, name);
4133 if (sreloc == NULL)
4134 {
4135 flagword flags;
4136
4137 sreloc = bfd_make_section (dynobj, name);
4138 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4139 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
e5a52504
MM		 4140 if ((sec->flags & SEC_ALLOC) != 0
4141 /* BPABI objects never have dynamic
4142 relocations mapped. */
4143 && !htab->symbian_p)
252b5132
RH		 4144 flags |= SEC_ALLOC | SEC_LOAD;
4145 if (sreloc == NULL
4146 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4147 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 4148 return FALSE;
252b5132 4149 }
5e681ec4
PB		 4150
4151 elf_section_data (sec)->sreloc = sreloc;
252b5132
RH		 4152 }
4153
5e681ec4
PB		 4154 /* If this is a global symbol, we count the number of
4155 relocations we need for this symbol. */
4156 if (h != NULL)
252b5132 4157 {
5e681ec4
PB		 4158 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
4159 }
4160 else
4161 {
4162 /* Track dynamic relocs needed for local syms too.
4163 We really need local syms available to do this
4164 easily. Oh well. */
57e8b36a 4165
5e681ec4
PB		 4166 asection *s;
4167 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4168 sec, r_symndx);
4169 if (s == NULL)
4170 return FALSE;
57e8b36a 4171
5e681ec4
PB		 4172 head = ((struct elf32_arm_relocs_copied **)
4173 &elf_section_data (s)->local_dynrel);
4174 }
57e8b36a 4175
5e681ec4
PB		 4176 p = *head;
4177 if (p == NULL || p->section != sec)
4178 {
4179 bfd_size_type amt = sizeof *p;
57e8b36a 4180
5e681ec4 4181 p = bfd_alloc (htab->root.dynobj, amt);
252b5132 4182 if (p == NULL)
5e681ec4
PB		 4183 return FALSE;
4184 p->next = *head;
4185 *head = p;
4186 p->section = sec;
4187 p->count = 0;
252b5132 4188 }
57e8b36a 4189
eb043451 4190 if (r_type == R_ARM_ABS32
eb043451 4191 || r_type == R_ARM_REL32)
7359ea65 4192 p->count += 1;
252b5132
RH		 4193 }
4194 break;
4195
4196 /* This relocation describes the C++ object vtable hierarchy.
4197 Reconstruct it for later use during GC. */
4198 case R_ARM_GNU_VTINHERIT:
c152c796 4199 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 4200 return FALSE;
252b5132 4201 break;
9a5aca8c 4202
252b5132
RH		 4203 /* This relocation describes which C++ vtable entries are actually
4204 used. Record for later use during GC. */
4205 case R_ARM_GNU_VTENTRY:
c152c796 4206 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6 4207 return FALSE;
252b5132
RH		 4208 break;
4209 }
4210 }
f21f3fe0 4211
b34976b6 4212 return TRUE;
252b5132
RH		 4213}
4214
b34976b6 4215static bfd_boolean
0367ecfb 4216is_arm_mapping_symbol_name (const char * name)
252b5132 4217{
0367ecfb
NC		 4218 return (name != NULL)
4219 && (name[0] == '$')
4220 && ((name[1] == 'a') || (name[1] == 't') || (name[1] == 'd'))
4221 && (name[2] == 0);
4222}
f21f3fe0 4223
3c9458e9
NC		 4224/* Treat mapping symbols as special target symbols. */
4225
4226static bfd_boolean
4227elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
4228{
4229 return is_arm_mapping_symbol_name (sym->name);
4230}
4231
0367ecfb
NC		 4232/* This is a copy of elf_find_function() from elf.c except that
4233 ARM mapping symbols are ignored when looking for function names
4234 and STT_ARM_TFUNC is considered to a function type. */
252b5132 4235
0367ecfb
NC		 4236static bfd_boolean
4237arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
4238 asection * section,
4239 asymbol ** symbols,
4240 bfd_vma offset,
4241 const char ** filename_ptr,
4242 const char ** functionname_ptr)
4243{
4244 const char * filename = NULL;
4245 asymbol * func = NULL;
4246 bfd_vma low_func = 0;
4247 asymbol ** p;
252b5132
RH		 4248
4249 for (p = symbols; *p != NULL; p++)
4250 {
4251 elf_symbol_type *q;
4252
4253 q = (elf_symbol_type *) *p;
4254
252b5132
RH		 4255 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4256 {
4257 default:
4258 break;
4259 case STT_FILE:
4260 filename = bfd_asymbol_name (&q->symbol);
4261 break;
252b5132
RH		 4262 case STT_FUNC:
4263 case STT_ARM_TFUNC:
0367ecfb
NC		 4264 /* Skip $a and $t symbols. */
4265 if ((q->symbol.flags & BSF_LOCAL)
4266 && is_arm_mapping_symbol_name (q->symbol.name))
4267 continue;
4268 /* Fall through. */
4269 case STT_NOTYPE:
6b40fcba 4270 if (bfd_get_section (&q->symbol) == section
252b5132
RH		 4271 && q->symbol.value >= low_func
4272 && q->symbol.value <= offset)
4273 {
4274 func = (asymbol *) q;
4275 low_func = q->symbol.value;
4276 }
4277 break;
4278 }
4279 }
4280
4281 if (func == NULL)
b34976b6 4282 return FALSE;
252b5132 4283
0367ecfb
NC		 4284 if (filename_ptr)
4285 *filename_ptr = filename;
4286 if (functionname_ptr)
4287 *functionname_ptr = bfd_asymbol_name (func);
4288
4289 return TRUE;
4290}
4291
4292
4293/* Find the nearest line to a particular section and offset, for error
4294 reporting. This code is a duplicate of the code in elf.c, except
4295 that it uses arm_elf_find_function. */
4296
4297static bfd_boolean
4298elf32_arm_find_nearest_line (bfd * abfd,
4299 asection * section,
4300 asymbol ** symbols,
4301 bfd_vma offset,
4302 const char ** filename_ptr,
4303 const char ** functionname_ptr,
4304 unsigned int * line_ptr)
4305{
4306 bfd_boolean found = FALSE;
4307
4308 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4309
4310 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4311 filename_ptr, functionname_ptr,
4312 line_ptr, 0,
4313 & elf_tdata (abfd)->dwarf2_find_line_info))
4314 {
4315 if (!*functionname_ptr)
4316 arm_elf_find_function (abfd, section, symbols, offset,
4317 *filename_ptr ? NULL : filename_ptr,
4318 functionname_ptr);
f21f3fe0 4319
0367ecfb
NC		 4320 return TRUE;
4321 }
4322
4323 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4324 & found, filename_ptr,
4325 functionname_ptr, line_ptr,
4326 & elf_tdata (abfd)->line_info))
4327 return FALSE;
4328
4329 if (found && (*functionname_ptr || *line_ptr))
4330 return TRUE;
4331
4332 if (symbols == NULL)
4333 return FALSE;
4334
4335 if (! arm_elf_find_function (abfd, section, symbols, offset,
4336 filename_ptr, functionname_ptr))
4337 return FALSE;
4338
4339 *line_ptr = 0;
b34976b6 4340 return TRUE;
252b5132
RH		 4341}
4342
4343/* Adjust a symbol defined by a dynamic object and referenced by a
4344 regular object. The current definition is in some section of the
4345 dynamic object, but we're not including those sections. We have to
4346 change the definition to something the rest of the link can
4347 understand. */
4348
b34976b6 4349static bfd_boolean
57e8b36a
NC		 4350elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
4351 struct elf_link_hash_entry * h)
252b5132
RH		 4352{
4353 bfd * dynobj;
4354 asection * s;
4355 unsigned int power_of_two;
b7693d02 4356 struct elf32_arm_link_hash_entry * eh;
67687978 4357 struct elf32_arm_link_hash_table *globals;
252b5132 4358
67687978 4359 globals = elf32_arm_hash_table (info);
252b5132
RH		 4360 dynobj = elf_hash_table (info)->dynobj;
4361
4362 /* Make sure we know what is going on here. */
4363 BFD_ASSERT (dynobj != NULL
f5385ebf 4364 && (h->needs_plt
f6e332e6 4365 || h->u.weakdef != NULL
f5385ebf
AM		 4366 || (h->def_dynamic
4367 && h->ref_regular
4368 && !h->def_regular)));
252b5132 4369
b7693d02
DJ		 4370 eh = (struct elf32_arm_link_hash_entry *) h;
4371
252b5132
RH		 4372 /* If this is a function, put it in the procedure linkage table. We
4373 will fill in the contents of the procedure linkage table later,
4374 when we know the address of the .got section. */
b7693d02 4375 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
f5385ebf 4376 || h->needs_plt)
252b5132 4377 {
5e681ec4
PB		 4378 if (h->plt.refcount <= 0
4379 || SYMBOL_CALLS_LOCAL (info, h)
4380 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4381 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 4382 {
4383 /* This case can occur if we saw a PLT32 reloc in an input
5e681ec4
PB		 4384 file, but the symbol was never referred to by a dynamic
4385 object, or if all references were garbage collected. In
4386 such a case, we don't actually need to build a procedure
4387 linkage table, and we can just do a PC24 reloc instead. */
4388 h->plt.offset = (bfd_vma) -1;
b7693d02 4389 eh->plt_thumb_refcount = 0;
f5385ebf 4390 h->needs_plt = 0;
252b5132
RH		 4391 }
4392
b34976b6 4393 return TRUE;
252b5132 4394 }
5e681ec4 4395 else
b7693d02
DJ		 4396 {
4397 /* It's possible that we incorrectly decided a .plt reloc was
4398 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4399 in check_relocs. We can't decide accurately between function
4400 and non-function syms in check-relocs; Objects loaded later in
4401 the link may change h->type. So fix it now. */
4402 h->plt.offset = (bfd_vma) -1;
4403 eh->plt_thumb_refcount = 0;
4404 }
252b5132
RH		 4405
4406 /* If this is a weak symbol, and there is a real definition, the
4407 processor independent code will have arranged for us to see the
4408 real definition first, and we can just use the same value. */
f6e332e6 4409 if (h->u.weakdef != NULL)
252b5132 4410 {
f6e332e6
AM		 4411 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4412 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4413 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4414 h->root.u.def.value = h->u.weakdef->root.u.def.value;
b34976b6 4415 return TRUE;
252b5132
RH		 4416 }
4417
4418 /* This is a reference to a symbol defined by a dynamic object which
4419 is not a function. */
4420
4421 /* If we are creating a shared library, we must presume that the
4422 only references to the symbol are via the global offset table.
4423 For such cases we need not do anything here; the relocations will
67687978
PB		 4424 be handled correctly by relocate_section. Relocatable executables
4425 can reference data in shared objects directly, so we don't need to
4426 do anything here. */
4427 if (info->shared || globals->root.is_relocatable_executable)
b34976b6 4428 return TRUE;
252b5132
RH		 4429
4430 /* We must allocate the symbol in our .dynbss section, which will
4431 become part of the .bss section of the executable. There will be
4432 an entry for this symbol in the .dynsym section. The dynamic
4433 object will contain position independent code, so all references
4434 from the dynamic object to this symbol will go through the global
4435 offset table. The dynamic linker will use the .dynsym entry to
4436 determine the address it must put in the global offset table, so
4437 both the dynamic object and the regular object will refer to the
4438 same memory location for the variable. */
252b5132
RH		 4439 s = bfd_get_section_by_name (dynobj, ".dynbss");
4440 BFD_ASSERT (s != NULL);
4441
4442 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4443 copy the initial value out of the dynamic object and into the
4444 runtime process image. We need to remember the offset into the
4445 .rel.bss section we are going to use. */
4446 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4447 {
4448 asection *srel;
4449
4450 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
4451 BFD_ASSERT (srel != NULL);
eea6121a 4452 srel->size += sizeof (Elf32_External_Rel);
f5385ebf 4453 h->needs_copy = 1;
252b5132
RH		 4454 }
4455
4456 /* We need to figure out the alignment required for this symbol. I
4457 have no idea how ELF linkers handle this. */
4458 power_of_two = bfd_log2 (h->size);
4459 if (power_of_two > 3)
4460 power_of_two = 3;
4461
4462 /* Apply the required alignment. */
eea6121a 4463 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
252b5132
RH		 4464 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4465 {
4466 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
b34976b6 4467 return FALSE;
252b5132
RH		 4468 }
4469
4470 /* Define the symbol as being at this point in the section. */
4471 h->root.u.def.section = s;
eea6121a 4472 h->root.u.def.value = s->size;
252b5132
RH		 4473
4474 /* Increment the section size to make room for the symbol. */
eea6121a 4475 s->size += h->size;
252b5132 4476
b34976b6 4477 return TRUE;
252b5132
RH		 4478}
4479
5e681ec4
PB		 4480/* Allocate space in .plt, .got and associated reloc sections for
4481 dynamic relocs. */
4482
4483static bfd_boolean
57e8b36a 4484allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
5e681ec4
PB		 4485{
4486 struct bfd_link_info *info;
4487 struct elf32_arm_link_hash_table *htab;
4488 struct elf32_arm_link_hash_entry *eh;
4489 struct elf32_arm_relocs_copied *p;
4490
b7693d02
DJ		 4491 eh = (struct elf32_arm_link_hash_entry *) h;
4492
5e681ec4
PB		 4493 if (h->root.type == bfd_link_hash_indirect)
4494 return TRUE;
4495
4496 if (h->root.type == bfd_link_hash_warning)
4497 /* When warning symbols are created, they **replace** the "real"
4498 entry in the hash table, thus we never get to see the real
4499 symbol in a hash traversal. So look at it now. */
4500 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4501
4502 info = (struct bfd_link_info *) inf;
4503 htab = elf32_arm_hash_table (info);
4504
4505 if (htab->root.dynamic_sections_created
4506 && h->plt.refcount > 0)
4507 {
4508 /* Make sure this symbol is output as a dynamic symbol.
4509 Undefined weak syms won't yet be marked as dynamic. */
4510 if (h->dynindx == -1
f5385ebf 4511 && !h->forced_local)
5e681ec4 4512 {
c152c796 4513 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB		 4514 return FALSE;
4515 }
4516
4517 if (info->shared
7359ea65 4518 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5e681ec4
PB		 4519 {
4520 asection *s = htab->splt;
4521
4522 /* If this is the first .plt entry, make room for the special
4523 first entry. */
eea6121a 4524 if (s->size == 0)
e5a52504 4525 s->size += htab->plt_header_size;
5e681ec4 4526
eea6121a 4527 h->plt.offset = s->size;
5e681ec4 4528
b7693d02
DJ		 4529 /* If we will insert a Thumb trampoline before this PLT, leave room
4530 for it. */
4531 if (!htab->symbian_p && eh->plt_thumb_refcount > 0)
4532 {
4533 h->plt.offset += PLT_THUMB_STUB_SIZE;
4534 s->size += PLT_THUMB_STUB_SIZE;
4535 }
4536
5e681ec4
PB		 4537 /* If this symbol is not defined in a regular file, and we are
4538 not generating a shared library, then set the symbol to this
4539 location in the .plt. This is required to make function
4540 pointers compare as equal between the normal executable and
4541 the shared library. */
4542 if (! info->shared
f5385ebf 4543 && !h->def_regular)
5e681ec4
PB		 4544 {
4545 h->root.u.def.section = s;
4546 h->root.u.def.value = h->plt.offset;
b7693d02
DJ		 4547
4548 /* Make sure the function is not marked as Thumb, in case
4549 it is the target of an ABS32 relocation, which will
4550 point to the PLT entry. */
4551 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
4552 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
5e681ec4
PB		 4553 }
4554
4555 /* Make room for this entry. */
e5a52504 4556 s->size += htab->plt_entry_size;
5e681ec4 4557
e5a52504 4558 if (!htab->symbian_p)
b7693d02
DJ		 4559 {
4560 /* We also need to make an entry in the .got.plt section, which
4561 will be placed in the .got section by the linker script. */
4562 eh->plt_got_offset = htab->sgotplt->size;
4563 htab->sgotplt->size += 4;
4564 }
5e681ec4
PB		 4565
4566 /* We also need to make an entry in the .rel.plt section. */
eea6121a 4567 htab->srelplt->size += sizeof (Elf32_External_Rel);
5e681ec4
PB		 4568 }
4569 else
4570 {
4571 h->plt.offset = (bfd_vma) -1;
f5385ebf 4572 h->needs_plt = 0;
5e681ec4
PB		 4573 }
4574 }
4575 else
4576 {
4577 h->plt.offset = (bfd_vma) -1;
f5385ebf 4578 h->needs_plt = 0;
5e681ec4
PB		 4579 }
4580
4581 if (h->got.refcount > 0)
4582 {
4583 asection *s;
4584 bfd_boolean dyn;
4585
4586 /* Make sure this symbol is output as a dynamic symbol.
4587 Undefined weak syms won't yet be marked as dynamic. */
4588 if (h->dynindx == -1
f5385ebf 4589 && !h->forced_local)
5e681ec4 4590 {
c152c796 4591 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB		 4592 return FALSE;
4593 }
4594
e5a52504
MM		 4595 if (!htab->symbian_p)
4596 {
4597 s = htab->sgot;
4598 h->got.offset = s->size;
4599 s->size += 4;
4600 dyn = htab->root.dynamic_sections_created;
4601 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4602 || h->root.type != bfd_link_hash_undefweak)
4603 && (info->shared
4604 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
4605 htab->srelgot->size += sizeof (Elf32_External_Rel);
4606 }
5e681ec4
PB		 4607 }
4608 else
4609 h->got.offset = (bfd_vma) -1;
4610
5e681ec4
PB		 4611 if (eh->relocs_copied == NULL)
4612 return TRUE;
4613
4614 /* In the shared -Bsymbolic case, discard space allocated for
4615 dynamic pc-relative relocs against symbols which turn out to be
4616 defined in regular objects. For the normal shared case, discard
4617 space for pc-relative relocs that have become local due to symbol
4618 visibility changes. */
4619
67687978 4620 if (info->shared || htab->root.is_relocatable_executable)
5e681ec4 4621 {
7359ea65
DJ		 4622 /* Discard relocs on undefined weak syms with non-default
4623 visibility. */
5e681ec4
PB		 4624 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4625 && h->root.type == bfd_link_hash_undefweak)
4626 eh->relocs_copied = NULL;
67687978
PB		 4627 else if (htab->root.is_relocatable_executable && h->dynindx == -1
4628 && h->root.type == bfd_link_hash_new)
4629 {
4630 /* Output absolute symbols so that we can create relocations
4631 against them. For normal symbols we output a relocation
4632 against the section that contains them. */
4633 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4634 return FALSE;
4635 }
4636
5e681ec4
PB		 4637 }
4638 else
4639 {
4640 /* For the non-shared case, discard space for relocs against
4641 symbols which turn out to need copy relocs or are not
4642 dynamic. */
4643
f5385ebf
AM		 4644 if (!h->non_got_ref
4645 && ((h->def_dynamic
4646 && !h->def_regular)
5e681ec4
PB		 4647 || (htab->root.dynamic_sections_created
4648 && (h->root.type == bfd_link_hash_undefweak
4649 || h->root.type == bfd_link_hash_undefined))))
4650 {
4651 /* Make sure this symbol is output as a dynamic symbol.
4652 Undefined weak syms won't yet be marked as dynamic. */
4653 if (h->dynindx == -1
f5385ebf 4654 && !h->forced_local)
5e681ec4 4655 {
c152c796 4656 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5e681ec4
PB		 4657 return FALSE;
4658 }
4659
4660 /* If that succeeded, we know we'll be keeping all the
4661 relocs. */
4662 if (h->dynindx != -1)
4663 goto keep;
4664 }
4665
4666 eh->relocs_copied = NULL;
4667
4668 keep: ;
4669 }
4670
4671 /* Finally, allocate space. */
4672 for (p = eh->relocs_copied; p != NULL; p = p->next)
4673 {
4674 asection *sreloc = elf_section_data (p->section)->sreloc;
eea6121a 4675 sreloc->size += p->count * sizeof (Elf32_External_Rel);
5e681ec4
PB		 4676 }
4677
4678 return TRUE;
4679}
4680
08d1f311
DJ		 4681/* Find any dynamic relocs that apply to read-only sections. */
4682
4683static bfd_boolean
4684elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
4685{
4686 struct elf32_arm_link_hash_entry *eh;
4687 struct elf32_arm_relocs_copied *p;
4688
4689 if (h->root.type == bfd_link_hash_warning)
4690 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4691
4692 eh = (struct elf32_arm_link_hash_entry *) h;
4693 for (p = eh->relocs_copied; p != NULL; p = p->next)
4694 {
4695 asection *s = p->section;
4696
4697 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4698 {
4699 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4700
4701 info->flags |= DF_TEXTREL;
4702
4703 /* Not an error, just cut short the traversal. */
4704 return FALSE;
4705 }
4706 }
4707 return TRUE;
4708}
4709
252b5132
RH		 4710/* Set the sizes of the dynamic sections. */
4711
b34976b6 4712static bfd_boolean
57e8b36a
NC		 4713elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4714 struct bfd_link_info * info)
252b5132
RH		 4715{
4716 bfd * dynobj;
4717 asection * s;
b34976b6
AM		 4718 bfd_boolean plt;
4719 bfd_boolean relocs;
5e681ec4
PB		 4720 bfd *ibfd;
4721 struct elf32_arm_link_hash_table *htab;
252b5132 4722
5e681ec4 4723 htab = elf32_arm_hash_table (info);
252b5132
RH		 4724 dynobj = elf_hash_table (info)->dynobj;
4725 BFD_ASSERT (dynobj != NULL);
4726
4727 if (elf_hash_table (info)->dynamic_sections_created)
4728 {
4729 /* Set the contents of the .interp section to the interpreter. */
893c4fe2 4730 if (info->executable)
252b5132
RH		 4731 {
4732 s = bfd_get_section_by_name (dynobj, ".interp");
4733 BFD_ASSERT (s != NULL);
eea6121a 4734 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 4735 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4736 }
4737 }
5e681ec4
PB		 4738
4739 /* Set up .got offsets for local syms, and space for local dynamic
4740 relocs. */
4741 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
252b5132 4742 {
5e681ec4
PB		 4743 bfd_signed_vma *local_got;
4744 bfd_signed_vma *end_local_got;
4745 char *local_tls_type;
4746 bfd_size_type locsymcount;
4747 Elf_Internal_Shdr *symtab_hdr;
4748 asection *srel;
4749
4750 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4751 continue;
4752
4753 for (s = ibfd->sections; s != NULL; s = s->next)
4754 {
4755 struct elf32_arm_relocs_copied *p;
4756
4757 for (p = *((struct elf32_arm_relocs_copied **)
4758 &elf_section_data (s)->local_dynrel);
4759 p != NULL;
4760 p = p->next)
4761 {
4762 if (!bfd_is_abs_section (p->section)
4763 && bfd_is_abs_section (p->section->output_section))
4764 {
4765 /* Input section has been discarded, either because
4766 it is a copy of a linkonce section or due to
4767 linker script /DISCARD/, so we'll be discarding
4768 the relocs too. */
4769 }
4770 else if (p->count != 0)
4771 {
4772 srel = elf_section_data (p->section)->sreloc;
eea6121a 4773 srel->size += p->count * sizeof (Elf32_External_Rel);
5e681ec4
PB		 4774 if ((p->section->output_section->flags & SEC_READONLY) != 0)
4775 info->flags |= DF_TEXTREL;
4776 }
4777 }
4778 }
4779
4780 local_got = elf_local_got_refcounts (ibfd);
4781 if (!local_got)
4782 continue;
4783
4784 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4785 locsymcount = symtab_hdr->sh_info;
4786 end_local_got = local_got + locsymcount;
4787 s = htab->sgot;
4788 srel = htab->srelgot;
4789 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
4790 {
4791 if (*local_got > 0)
4792 {
eea6121a
AM		 4793 *local_got = s->size;
4794 s->size += 4;
5e681ec4 4795 if (info->shared)
eea6121a 4796 srel->size += sizeof (Elf32_External_Rel);
5e681ec4
PB		 4797 }
4798 else
4799 *local_got = (bfd_vma) -1;
4800 }
252b5132
RH		 4801 }
4802
5e681ec4
PB		 4803 /* Allocate global sym .plt and .got entries, and space for global
4804 sym dynamic relocs. */
57e8b36a 4805 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
252b5132
RH		 4806
4807 /* The check_relocs and adjust_dynamic_symbol entry points have
4808 determined the sizes of the various dynamic sections. Allocate
4809 memory for them. */
b34976b6
AM		 4810 plt = FALSE;
4811 relocs = FALSE;
252b5132
RH		 4812 for (s = dynobj->sections; s != NULL; s = s->next)
4813 {
4814 const char * name;
b34976b6 4815 bfd_boolean strip;
252b5132
RH		 4816
4817 if ((s->flags & SEC_LINKER_CREATED) == 0)
4818 continue;
4819
4820 /* It's OK to base decisions on the section name, because none
4821 of the dynobj section names depend upon the input files. */
4822 name = bfd_get_section_name (dynobj, s);
4823
b34976b6 4824 strip = FALSE;
252b5132 4825
24a1ba0f 4826 if (strcmp (name, ".plt") == 0)
252b5132 4827 {
eea6121a 4828 if (s->size == 0)
252b5132
RH		 4829 {
4830 /* Strip this section if we don't need it; see the
4831 comment below. */
b34976b6 4832 strip = TRUE;
252b5132
RH		 4833 }
4834 else
4835 {
4836 /* Remember whether there is a PLT. */
b34976b6 4837 plt = TRUE;
252b5132
RH		 4838 }
4839 }
4840 else if (strncmp (name, ".rel", 4) == 0)
4841 {
eea6121a 4842 if (s->size == 0)
252b5132
RH		 4843 {
4844 /* If we don't need this section, strip it from the
4845 output file. This is mostly to handle .rel.bss and
4846 .rel.plt. We must create both sections in
4847 create_dynamic_sections, because they must be created
4848 before the linker maps input sections to output
4849 sections. The linker does that before
4850 adjust_dynamic_symbol is called, and it is that
4851 function which decides whether anything needs to go
4852 into these sections. */
b34976b6 4853 strip = TRUE;
252b5132
RH		 4854 }
4855 else
4856 {
252b5132
RH		 4857 /* Remember whether there are any reloc sections other
4858 than .rel.plt. */
4859 if (strcmp (name, ".rel.plt") != 0)
b34976b6 4860 relocs = TRUE;
252b5132
RH		 4861
4862 /* We use the reloc_count field as a counter if we need
4863 to copy relocs into the output file. */
4864 s->reloc_count = 0;
4865 }
4866 }
4867 else if (strncmp (name, ".got", 4) != 0)
4868 {
4869 /* It's not one of our sections, so don't allocate space. */
4870 continue;
4871 }
4872
4873 if (strip)
4874 {
52585bb8 4875 _bfd_strip_section_from_output (info, s);
252b5132
RH		 4876 continue;
4877 }
4878
4879 /* Allocate memory for the section contents. */
eea6121a
AM		 4880 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4881 if (s->contents == NULL && s->size != 0)
b34976b6 4882 return FALSE;
252b5132
RH		 4883 }
4884
4885 if (elf_hash_table (info)->dynamic_sections_created)
4886 {
4887 /* Add some entries to the .dynamic section. We fill in the
4888 values later, in elf32_arm_finish_dynamic_sections, but we
4889 must add the entries now so that we get the correct size for
4890 the .dynamic section. The DT_DEBUG entry is filled in by the
4891 dynamic linker and used by the debugger. */
dc810e39 4892#define add_dynamic_entry(TAG, VAL) \
5a580b3a 4893 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39
AM		 4894
4895 if (!info->shared)
252b5132 4896 {
dc810e39 4897 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 4898 return FALSE;
252b5132
RH		 4899 }
4900
4901 if (plt)
4902 {
dc810e39
AM		 4903 if ( !add_dynamic_entry (DT_PLTGOT, 0)
4904 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4905 || !add_dynamic_entry (DT_PLTREL, DT_REL)
4906 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 4907 return FALSE;
252b5132
RH		 4908 }
4909
4910 if (relocs)
4911 {
dc810e39
AM		 4912 if ( !add_dynamic_entry (DT_REL, 0)
4913 || !add_dynamic_entry (DT_RELSZ, 0)
4914 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 4915 return FALSE;
252b5132
RH		 4916 }
4917
08d1f311
DJ		 4918 /* If any dynamic relocs apply to a read-only section,
4919 then we need a DT_TEXTREL entry. */
4920 if ((info->flags & DF_TEXTREL) == 0)
4921 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
4922 (PTR) info);
4923
99e4ae17 4924 if ((info->flags & DF_TEXTREL) != 0)
252b5132 4925 {
dc810e39 4926 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 4927 return FALSE;
d6cf2879 4928 info->flags |= DF_TEXTREL;
252b5132
RH		 4929 }
4930 }
dc810e39 4931#undef add_synamic_entry
252b5132 4932
b34976b6 4933 return TRUE;
252b5132
RH		 4934}
4935
252b5132
RH		 4936/* Finish up dynamic symbol handling. We set the contents of various
4937 dynamic sections here. */
4938
b34976b6 4939static bfd_boolean
57e8b36a
NC		 4940elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
4941 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
252b5132
RH		 4942{
4943 bfd * dynobj;
e5a52504 4944 struct elf32_arm_link_hash_table *htab;
b7693d02 4945 struct elf32_arm_link_hash_entry *eh;
252b5132
RH		 4946
4947 dynobj = elf_hash_table (info)->dynobj;
e5a52504 4948 htab = elf32_arm_hash_table (info);
b7693d02 4949 eh = (struct elf32_arm_link_hash_entry *) h;
252b5132
RH		 4950
4951 if (h->plt.offset != (bfd_vma) -1)
4952 {
4953 asection * splt;
252b5132 4954 asection * srel;
e5a52504 4955 bfd_byte *loc;
24a1ba0f 4956 bfd_vma plt_index;
947216bf 4957 Elf_Internal_Rela rel;
252b5132
RH		 4958
4959 /* This symbol has an entry in the procedure linkage table. Set
4960 it up. */
4961
4962 BFD_ASSERT (h->dynindx != -1);
4963
4964 splt = bfd_get_section_by_name (dynobj, ".plt");
252b5132 4965 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
e5a52504 4966 BFD_ASSERT (splt != NULL && srel != NULL);
252b5132 4967
e5a52504
MM		 4968 /* Fill in the entry in the procedure linkage table. */
4969 if (htab->symbian_p)
4970 {
4971 unsigned i;
4972 for (i = 0; i < htab->plt_entry_size / 4; ++i)
4973 bfd_put_32 (output_bfd,
4974 elf32_arm_symbian_plt_entry[i],
4975 splt->contents + h->plt.offset + 4 * i);
4976
4977 /* Fill in the entry in the .rel.plt section. */
2a1b9a48
MM		 4978 rel.r_offset = (splt->output_section->vma
4979 + splt->output_offset
e5a52504
MM		 4980 + h->plt.offset + 4 * (i - 1));
4981 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
b7693d02
DJ		 4982
4983 /* Get the index in the procedure linkage table which
4984 corresponds to this symbol. This is the index of this symbol
4985 in all the symbols for which we are making plt entries. The
4986 first entry in the procedure linkage table is reserved. */
4987 plt_index = ((h->plt.offset - htab->plt_header_size)
4988 / htab->plt_entry_size);
e5a52504
MM		 4989 }
4990 else
4991 {
4992 bfd_vma got_offset;
4993 bfd_vma got_displacement;
4994 asection * sgot;
4995
4996 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4997 BFD_ASSERT (sgot != NULL);
4998
b7693d02
DJ		 4999 /* Get the offset into the .got.plt table of the entry that
5000 corresponds to this function. */
5001 got_offset = eh->plt_got_offset;
5002
5003 /* Get the index in the procedure linkage table which
5004 corresponds to this symbol. This is the index of this symbol
5005 in all the symbols for which we are making plt entries. The
5006 first three entries in .got.plt are reserved; after that
5007 symbols appear in the same order as in .plt. */
5008 plt_index = (got_offset - 12) / 4;
e5a52504
MM		 5009
5010 /* Calculate the displacement between the PLT slot and the
b7693d02
DJ		 5011 entry in the GOT. The eight-byte offset accounts for the
5012 value produced by adding to pc in the first instruction
5013 of the PLT stub. */
e5a52504
MM		 5014 got_displacement = (sgot->output_section->vma
5015 + sgot->output_offset
5016 + got_offset
5017 - splt->output_section->vma
5018 - splt->output_offset
5019 - h->plt.offset
5020 - 8);
5e681ec4 5021
e5a52504 5022 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
5e681ec4 5023
b7693d02
DJ		 5024 if (eh->plt_thumb_refcount > 0)
5025 {
5026 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
5027 splt->contents + h->plt.offset - 4);
5028 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
5029 splt->contents + h->plt.offset - 2);
5030 }
5031
e5a52504
MM		 5032 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
5033 splt->contents + h->plt.offset + 0);
5034 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
5035 splt->contents + h->plt.offset + 4);
5036 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
5037 splt->contents + h->plt.offset + 8);
5e681ec4 5038#ifdef FOUR_WORD_PLT
e5a52504
MM		 5039 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
5040 splt->contents + h->plt.offset + 12);
5e681ec4 5041#endif
252b5132 5042
e5a52504
MM		 5043 /* Fill in the entry in the global offset table. */
5044 bfd_put_32 (output_bfd,
5045 (splt->output_section->vma
5046 + splt->output_offset),
5047 sgot->contents + got_offset);
5048
5049 /* Fill in the entry in the .rel.plt section. */
5050 rel.r_offset = (sgot->output_section->vma
5051 + sgot->output_offset
5052 + got_offset);
5053 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
5054 }
57e8b36a 5055
947216bf
AM		 5056 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
5057 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132 5058
f5385ebf 5059 if (!h->def_regular)
252b5132
RH		 5060 {
5061 /* Mark the symbol as undefined, rather than as defined in
5062 the .plt section. Leave the value alone. */
5063 sym->st_shndx = SHN_UNDEF;
d982ba73
PB		 5064 /* If the symbol is weak, we do need to clear the value.
5065 Otherwise, the PLT entry would provide a definition for
5066 the symbol even if the symbol wasn't defined anywhere,
5067 and so the symbol would never be NULL. */
f5385ebf 5068 if (!h->ref_regular_nonweak)
d982ba73 5069 sym->st_value = 0;
252b5132
RH		 5070 }
5071 }
5072
5073 if (h->got.offset != (bfd_vma) -1)
5074 {
5075 asection * sgot;
5076 asection * srel;
947216bf
AM		 5077 Elf_Internal_Rela rel;
5078 bfd_byte *loc;
252b5132
RH		 5079
5080 /* This symbol has an entry in the global offset table. Set it
5081 up. */
252b5132
RH		 5082 sgot = bfd_get_section_by_name (dynobj, ".got");
5083 srel = bfd_get_section_by_name (dynobj, ".rel.got");
5084 BFD_ASSERT (sgot != NULL && srel != NULL);
5085
5086 rel.r_offset = (sgot->output_section->vma
5087 + sgot->output_offset
dc810e39 5088 + (h->got.offset &~ (bfd_vma) 1));
252b5132 5089
5e681ec4
PB		 5090 /* If this is a static link, or it is a -Bsymbolic link and the
5091 symbol is defined locally or was forced to be local because
5092 of a version file, we just want to emit a RELATIVE reloc.
5093 The entry in the global offset table will already have been
5094 initialized in the relocate_section function. */
252b5132 5095 if (info->shared
5e681ec4
PB		 5096 && SYMBOL_REFERENCES_LOCAL (info, h))
5097 {
5098 BFD_ASSERT((h->got.offset & 1) != 0);
5099 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5100 }
252b5132
RH		 5101 else
5102 {
5e681ec4 5103 BFD_ASSERT((h->got.offset & 1) == 0);
252b5132
RH		 5104 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5105 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5106 }
5107
947216bf
AM		 5108 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5109 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 5110 }
5111
f5385ebf 5112 if (h->needs_copy)
252b5132
RH		 5113 {
5114 asection * s;
947216bf
AM		 5115 Elf_Internal_Rela rel;
5116 bfd_byte *loc;
252b5132
RH		 5117
5118 /* This symbol needs a copy reloc. Set it up. */
252b5132
RH		 5119 BFD_ASSERT (h->dynindx != -1
5120 && (h->root.type == bfd_link_hash_defined
5121 || h->root.type == bfd_link_hash_defweak));
5122
5123 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5124 ".rel.bss");
5125 BFD_ASSERT (s != NULL);
5126
5127 rel.r_offset = (h->root.u.def.value
5128 + h->root.u.def.section->output_section->vma
5129 + h->root.u.def.section->output_offset);
5130 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
947216bf
AM		 5131 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5132 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 5133 }
5134
5135 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5136 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5137 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5138 sym->st_shndx = SHN_ABS;
5139
b34976b6 5140 return TRUE;
252b5132
RH		 5141}
5142
5143/* Finish up the dynamic sections. */
5144
b34976b6 5145static bfd_boolean
57e8b36a 5146elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
252b5132
RH		 5147{
5148 bfd * dynobj;
5149 asection * sgot;
5150 asection * sdyn;
5151
5152 dynobj = elf_hash_table (info)->dynobj;
5153
5154 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
229fcec5 5155 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
252b5132
RH		 5156 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5157
5158 if (elf_hash_table (info)->dynamic_sections_created)
5159 {
5160 asection *splt;
5161 Elf32_External_Dyn *dyncon, *dynconend;
229fcec5 5162 struct elf32_arm_link_hash_table *htab;
252b5132 5163
229fcec5 5164 htab = elf32_arm_hash_table (info);
252b5132 5165 splt = bfd_get_section_by_name (dynobj, ".plt");
24a1ba0f 5166 BFD_ASSERT (splt != NULL && sdyn != NULL);
252b5132
RH		 5167
5168 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 5169 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9b485d32 5170
252b5132
RH		 5171 for (; dyncon < dynconend; dyncon++)
5172 {
5173 Elf_Internal_Dyn dyn;
5174 const char * name;
5175 asection * s;
5176
5177 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5178
5179 switch (dyn.d_tag)
5180 {
229fcec5
MM		 5181 unsigned int type;
5182
252b5132
RH		 5183 default:
5184 break;
5185
229fcec5
MM		 5186 case DT_HASH:
5187 name = ".hash";
5188 goto get_vma_if_bpabi;
5189 case DT_STRTAB:
5190 name = ".dynstr";
5191 goto get_vma_if_bpabi;
5192 case DT_SYMTAB:
5193 name = ".dynsym";
5194 goto get_vma_if_bpabi;
c0042f5d
MM		 5195 case DT_VERSYM:
5196 name = ".gnu.version";
5197 goto get_vma_if_bpabi;
5198 case DT_VERDEF:
5199 name = ".gnu.version_d";
5200 goto get_vma_if_bpabi;
5201 case DT_VERNEED:
5202 name = ".gnu.version_r";
5203 goto get_vma_if_bpabi;
5204
252b5132
RH		 5205 case DT_PLTGOT:
5206 name = ".got";
5207 goto get_vma;
5208 case DT_JMPREL:
5209 name = ".rel.plt";
5210 get_vma:
5211 s = bfd_get_section_by_name (output_bfd, name);
5212 BFD_ASSERT (s != NULL);
229fcec5
MM		 5213 if (!htab->symbian_p)
5214 dyn.d_un.d_ptr = s->vma;
5215 else
5216 /* In the BPABI, tags in the PT_DYNAMIC section point
5217 at the file offset, not the memory address, for the
5218 convenience of the post linker. */
5219 dyn.d_un.d_ptr = s->filepos;
252b5132
RH		 5220 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5221 break;
5222
229fcec5
MM		 5223 get_vma_if_bpabi:
5224 if (htab->symbian_p)
5225 goto get_vma;
5226 break;
5227
252b5132
RH		 5228 case DT_PLTRELSZ:
5229 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5230 BFD_ASSERT (s != NULL);
eea6121a 5231 dyn.d_un.d_val = s->size;
252b5132
RH		 5232 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5233 break;
229fcec5 5234
252b5132 5235 case DT_RELSZ:
229fcec5
MM		 5236 if (!htab->symbian_p)
5237 {
5238 /* My reading of the SVR4 ABI indicates that the
5239 procedure linkage table relocs (DT_JMPREL) should be
5240 included in the overall relocs (DT_REL). This is
5241 what Solaris does. However, UnixWare can not handle
5242 that case. Therefore, we override the DT_RELSZ entry
5243 here to make it not include the JMPREL relocs. Since
5244 the linker script arranges for .rel.plt to follow all
5245 other relocation sections, we don't have to worry
5246 about changing the DT_REL entry. */
5247 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5248 if (s != NULL)
5249 dyn.d_un.d_val -= s->size;
5250 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5251 break;
5252 }
5253 /* Fall through */
5254
5255 case DT_REL:
5256 case DT_RELA:
5257 case DT_RELASZ:
5258 /* In the BPABI, the DT_REL tag must point at the file
5259 offset, not the VMA, of the first relocation
5260 section. So, we use code similar to that in
5261 elflink.c, but do not check for SHF_ALLOC on the
5262 relcoation section, since relocations sections are
5263 never allocated under the BPABI. The comments above
5264 about Unixware notwithstanding, we include all of the
5265 relocations here. */
5266 if (htab->symbian_p)
5267 {
5268 unsigned int i;
5269 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5270 ? SHT_REL : SHT_RELA);
5271 dyn.d_un.d_val = 0;
5272 for (i = 1; i < elf_numsections (output_bfd); i++)
5273 {
5274 Elf_Internal_Shdr *hdr
5275 = elf_elfsections (output_bfd)[i];
5276 if (hdr->sh_type == type)
5277 {
5278 if (dyn.d_tag == DT_RELSZ
5279 || dyn.d_tag == DT_RELASZ)
5280 dyn.d_un.d_val += hdr->sh_size;
de52dba4
AM		 5281 else if ((ufile_ptr) hdr->sh_offset
5282 <= dyn.d_un.d_val - 1)
229fcec5
MM		 5283 dyn.d_un.d_val = hdr->sh_offset;
5284 }
5285 }
5286 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5287 }
252b5132 5288 break;
88f7bcd5
NC		 5289
5290 /* Set the bottom bit of DT_INIT/FINI if the
5291 corresponding function is Thumb. */
5292 case DT_INIT:
5293 name = info->init_function;
5294 goto get_sym;
5295 case DT_FINI:
5296 name = info->fini_function;
5297 get_sym:
5298 /* If it wasn't set by elf_bfd_final_link
4cc11e76 5299 then there is nothing to adjust. */
88f7bcd5
NC		 5300 if (dyn.d_un.d_val != 0)
5301 {
5302 struct elf_link_hash_entry * eh;
5303
5304 eh = elf_link_hash_lookup (elf_hash_table (info), name,
b34976b6 5305 FALSE, FALSE, TRUE);
88f7bcd5
NC		 5306 if (eh != (struct elf_link_hash_entry *) NULL
5307 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5308 {
5309 dyn.d_un.d_val |= 1;
b34976b6 5310 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
88f7bcd5
NC		 5311 }
5312 }
5313 break;
252b5132
RH		 5314 }
5315 }
5316
24a1ba0f 5317 /* Fill in the first entry in the procedure linkage table. */
e5a52504 5318 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
f7a74f8c 5319 {
5e681ec4
PB		 5320 bfd_vma got_displacement;
5321
5322 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5323 got_displacement = (sgot->output_section->vma
5324 + sgot->output_offset
5325 - splt->output_section->vma
5326 - splt->output_offset
5327 - 16);
5328
f7a74f8c
NC		 5329 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5330 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5331 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5332 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5e681ec4
PB		 5333#ifdef FOUR_WORD_PLT
5334 /* The displacement value goes in the otherwise-unused last word of
5335 the second entry. */
5336 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5337#else
5338 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5339#endif
f7a74f8c 5340 }
252b5132
RH		 5341
5342 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5343 really seem like the right value. */
5344 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5345 }
5346
5347 /* Fill in the first three entries in the global offset table. */
229fcec5 5348 if (sgot)
252b5132 5349 {
229fcec5
MM		 5350 if (sgot->size > 0)
5351 {
5352 if (sdyn == NULL)
5353 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5354 else
5355 bfd_put_32 (output_bfd,
5356 sdyn->output_section->vma + sdyn->output_offset,
5357 sgot->contents);
5358 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5359 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5360 }
252b5132 5361
229fcec5
MM		 5362 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5363 }
252b5132 5364
b34976b6 5365 return TRUE;
252b5132
RH		 5366}
5367
ba96a88f 5368static void
57e8b36a 5369elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
ba96a88f 5370{
9b485d32 5371 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
e489d0ae 5372 struct elf32_arm_link_hash_table *globals;
ba96a88f
NC		 5373
5374 i_ehdrp = elf_elfheader (abfd);
5375
94a3258f
PB		 5376 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
5377 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
5378 else
5379 i_ehdrp->e_ident[EI_OSABI] = 0;
ba96a88f 5380 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
e489d0ae 5381
93204d3a
PB		 5382 if (link_info)
5383 {
5384 globals = elf32_arm_hash_table (link_info);
5385 if (globals->byteswap_code)
5386 i_ehdrp->e_flags |= EF_ARM_BE8;
5387 }
ba96a88f
NC		 5388}
5389
99e4ae17 5390static enum elf_reloc_type_class
57e8b36a 5391elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
99e4ae17 5392{
f51e552e 5393 switch ((int) ELF32_R_TYPE (rela->r_info))
99e4ae17
AJ		 5394 {
5395 case R_ARM_RELATIVE:
5396 return reloc_class_relative;
5397 case R_ARM_JUMP_SLOT:
5398 return reloc_class_plt;
5399 case R_ARM_COPY:
5400 return reloc_class_copy;
5401 default:
5402 return reloc_class_normal;
5403 }
5404}
5405
e16bb312
NC		 5406/* Set the right machine number for an Arm ELF file. */
5407
5408static bfd_boolean
57e8b36a 5409elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
e16bb312
NC		 5410{
5411 if (hdr->sh_type == SHT_NOTE)
5412 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
5413
5414 return TRUE;
5415}
5416
e489d0ae 5417static void
57e8b36a 5418elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
e16bb312 5419{
5a6c6817 5420 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
e16bb312
NC		 5421}
5422
40a18ebd
NC		 5423/* Return TRUE if this is an unwinding table entry. */
5424
5425static bfd_boolean
5426is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
5427{
5428 size_t len1, len2;
5429
5430 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
5431 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
5432 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
5433 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
5434}
5435
5436
5437/* Set the type and flags for an ARM section. We do this by
5438 the section name, which is a hack, but ought to work. */
5439
5440static bfd_boolean
5441elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
5442{
5443 const char * name;
5444
5445 name = bfd_get_section_name (abfd, sec);
5446
5447 if (is_arm_elf_unwind_section_name (abfd, name))
5448 {
5449 hdr->sh_type = SHT_ARM_EXIDX;
5450 hdr->sh_flags |= SHF_LINK_ORDER;
5451 }
5452 return TRUE;
5453}
5454
6dc132d9
L		 5455/* Handle an ARM specific section when reading an object file. This is
5456 called when bfd_section_from_shdr finds a section with an unknown
5457 type. */
40a18ebd
NC		 5458
5459static bfd_boolean
5460elf32_arm_section_from_shdr (bfd *abfd,
5461 Elf_Internal_Shdr * hdr,
6dc132d9
L		 5462 const char *name,
5463 int shindex)
40a18ebd
NC		 5464{
5465 /* There ought to be a place to keep ELF backend specific flags, but
5466 at the moment there isn't one. We just keep track of the
5467 sections by their name, instead. Fortunately, the ABI gives
5468 names for all the ARM specific sections, so we will probably get
5469 away with this. */
5470 switch (hdr->sh_type)
5471 {
5472 case SHT_ARM_EXIDX:
5473 break;
5474
5475 default:
5476 return FALSE;
5477 }
5478
6dc132d9 5479 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
40a18ebd
NC		 5480 return FALSE;
5481
5482 return TRUE;
5483}
e489d0ae
PB		 5484
5485/* Called for each symbol. Builds a section map based on mapping symbols.
5486 Does not alter any of the symbols. */
5487
5488static bfd_boolean
5489elf32_arm_output_symbol_hook (struct bfd_link_info *info,
5490 const char *name,
5491 Elf_Internal_Sym *elfsym,
5492 asection *input_sec,
5493 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
5494{
5495 int mapcount;
5496 elf32_arm_section_map *map;
5497 struct elf32_arm_link_hash_table *globals;
5498
5499 /* Only do this on final link. */
5500 if (info->relocatable)
5501 return TRUE;
5502
5503 /* Only build a map if we need to byteswap code. */
5504 globals = elf32_arm_hash_table (info);
5505 if (!globals->byteswap_code)
5506 return TRUE;
5507
5508 /* We only want mapping symbols. */
0367ecfb 5509 if (! is_arm_mapping_symbol_name (name))
e489d0ae
PB		 5510 return TRUE;
5511
5512 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
5513 map = elf32_arm_section_data (input_sec)->map;
5514 /* TODO: This may be inefficient, but we probably don't usually have many
5515 mapping symbols per section. */
5516 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
5517 elf32_arm_section_data (input_sec)->map = map;
57e8b36a 5518
e489d0ae
PB		 5519 map[mapcount - 1].vma = elfsym->st_value;
5520 map[mapcount - 1].type = name[1];
5521 return TRUE;
5522}
5523
5524
5525/* Allocate target specific section data. */
5526
5527static bfd_boolean
5528elf32_arm_new_section_hook (bfd *abfd, asection *sec)
5529{
5530 struct _arm_elf_section_data *sdata;
5531 bfd_size_type amt = sizeof (*sdata);
5532
5533 sdata = bfd_zalloc (abfd, amt);
5534 if (sdata == NULL)
5535 return FALSE;
5536 sec->used_by_bfd = sdata;
5537
5538 return _bfd_elf_new_section_hook (abfd, sec);
5539}
5540
5541
5542/* Used to order a list of mapping symbols by address. */
5543
5544static int
5545elf32_arm_compare_mapping (const void * a, const void * b)
5546{
5547 return ((const elf32_arm_section_map *) a)->vma
5548 > ((const elf32_arm_section_map *) b)->vma;
5549}
5550
5551
5552/* Do code byteswapping. Return FALSE afterwards so that the section is
5553 written out as normal. */
5554
5555static bfd_boolean
5556elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
5557 bfd_byte *contents)
5558{
5559 int mapcount;
5560 elf32_arm_section_map *map;
5561 bfd_vma ptr;
5562 bfd_vma end;
5563 bfd_vma offset;
5564 bfd_byte tmp;
5565 int i;
57e8b36a 5566
e489d0ae
PB		 5567 mapcount = elf32_arm_section_data (sec)->mapcount;
5568 map = elf32_arm_section_data (sec)->map;
5569
5570 if (mapcount == 0)
5571 return FALSE;
5572
5573 qsort (map, mapcount, sizeof (elf32_arm_section_map),
5574 elf32_arm_compare_mapping);
5575
5576 offset = sec->output_section->vma + sec->output_offset;
5577 ptr = map[0].vma - offset;
5578 for (i = 0; i < mapcount; i++)
5579 {
5580 if (i == mapcount - 1)
eea6121a 5581 end = sec->size;
e489d0ae
PB		 5582 else
5583 end = map[i + 1].vma - offset;
57e8b36a 5584
e489d0ae
PB		 5585 switch (map[i].type)
5586 {
5587 case 'a':
5588 /* Byte swap code words. */
5589 while (ptr + 3 < end)
5590 {
5591 tmp = contents[ptr];
5592 contents[ptr] = contents[ptr + 3];
5593 contents[ptr + 3] = tmp;
5594 tmp = contents[ptr + 1];
5595 contents[ptr + 1] = contents[ptr + 2];
5596 contents[ptr + 2] = tmp;
5597 ptr += 4;
5598 }
5599 break;
5600
5601 case 't':
5602 /* Byte swap code halfwords. */
5603 while (ptr + 1 < end)
5604 {
5605 tmp = contents[ptr];
5606 contents[ptr] = contents[ptr + 1];
5607 contents[ptr + 1] = tmp;
5608 ptr += 2;
5609 }
5610 break;
5611
5612 case 'd':
5613 /* Leave data alone. */
5614 break;
5615 }
5616 ptr = end;
5617 }
93204d3a 5618 free (map);
e489d0ae
PB		 5619 return FALSE;
5620}
5621
b7693d02
DJ		 5622/* Display STT_ARM_TFUNC symbols as functions. */
5623
5624static void
5625elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5626 asymbol *asym)
5627{
5628 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5629
5630 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
5631 elfsym->symbol.flags |= BSF_FUNCTION;
5632}
5633
0beaef2b
PB		 5634
5635/* Mangle thumb function symbols as we read them in. */
5636
5637static void
5638elf32_arm_swap_symbol_in (bfd * abfd,
5639 const void *psrc,
5640 const void *pshn,
5641 Elf_Internal_Sym *dst)
5642{
5643 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
5644
5645 /* New EABI objects mark thumb function symbols by setting the low bit of
5646 the address. Turn these into STT_ARM_TFUNC. */
5647 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
5648 && (dst->st_value & 1))
5649 {
5650 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
5651 dst->st_value &= ~(bfd_vma) 1;
5652 }
5653}
5654
5655
5656/* Mangle thumb function symbols as we write them out. */
5657
5658static void
5659elf32_arm_swap_symbol_out (bfd *abfd,
5660 const Elf_Internal_Sym *src,
5661 void *cdst,
5662 void *shndx)
5663{
5664 Elf_Internal_Sym newsym;
5665
5666 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
5667 of the address set, as per the new EABI. We do this unconditionally
5668 because objcopy does not set the elf header flags until after
5669 it writes out the symbol table. */
5670 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
5671 {
5672 newsym = *src;
5673 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
5674 newsym.st_value |= 1;
5675
5676 src = &newsym;
5677 }
5678 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
5679}
5680
b294bdf8
MM		 5681/* Add the PT_ARM_EXIDX program header. */
5682
5683static bfd_boolean
5684elf32_arm_modify_segment_map (bfd *abfd,
5685 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5686{
5687 struct elf_segment_map *m;
5688 asection *sec;
5689
5690 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
5691 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5692 {
5693 /* If there is already a PT_ARM_EXIDX header, then we do not
5694 want to add another one. This situation arises when running
5695 "strip"; the input binary already has the header. */
5696 m = elf_tdata (abfd)->segment_map;
5697 while (m && m->p_type != PT_ARM_EXIDX)
5698 m = m->next;
5699 if (!m)
5700 {
5701 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
5702 if (m == NULL)
5703 return FALSE;
5704 m->p_type = PT_ARM_EXIDX;
5705 m->count = 1;
5706 m->sections[0] = sec;
5707
5708 m->next = elf_tdata (abfd)->segment_map;
5709 elf_tdata (abfd)->segment_map = m;
5710 }
5711 }
5712
5713 return TRUE;
5714}
5715
5716/* We may add a PT_ARM_EXIDX program header. */
5717
5718static int
5719elf32_arm_additional_program_headers (bfd *abfd)
5720{
5721 asection *sec;
5722
5723 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
5724 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
5725 return 1;
5726 else
5727 return 0;
5728}
5729
0beaef2b
PB		 5730/* We use this to override swap_symbol_in and swap_symbol_out. */
5731const struct elf_size_info elf32_arm_size_info = {
5732 sizeof (Elf32_External_Ehdr),
5733 sizeof (Elf32_External_Phdr),
5734 sizeof (Elf32_External_Shdr),
5735 sizeof (Elf32_External_Rel),
5736 sizeof (Elf32_External_Rela),
5737 sizeof (Elf32_External_Sym),
5738 sizeof (Elf32_External_Dyn),
5739 sizeof (Elf_External_Note),
5740 4,
5741 1,
5742 32, 2,
5743 ELFCLASS32, EV_CURRENT,
5744 bfd_elf32_write_out_phdrs,
5745 bfd_elf32_write_shdrs_and_ehdr,
5746 bfd_elf32_write_relocs,
5747 elf32_arm_swap_symbol_in,
5748 elf32_arm_swap_symbol_out,
5749 bfd_elf32_slurp_reloc_table,
5750 bfd_elf32_slurp_symbol_table,
5751 bfd_elf32_swap_dyn_in,
5752 bfd_elf32_swap_dyn_out,
5753 bfd_elf32_swap_reloc_in,
5754 bfd_elf32_swap_reloc_out,
5755 bfd_elf32_swap_reloca_in,
5756 bfd_elf32_swap_reloca_out
5757};
5758
252b5132
RH		 5759#define ELF_ARCH bfd_arch_arm
5760#define ELF_MACHINE_CODE EM_ARM
d0facd1b
NC		 5761#ifdef __QNXTARGET__
5762#define ELF_MAXPAGESIZE 0x1000
5763#else
f21f3fe0 5764#define ELF_MAXPAGESIZE 0x8000
d0facd1b 5765#endif
b1342370 5766#define ELF_MINPAGESIZE 0x1000
252b5132 5767
99e4ae17
AJ		 5768#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
5769#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
252b5132
RH		 5770#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
5771#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
5772#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
dc810e39 5773#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
252b5132 5774#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
e489d0ae 5775#define bfd_elf32_new_section_hook elf32_arm_new_section_hook
3c9458e9 5776#define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
252b5132
RH		 5777
5778#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
5779#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
5780#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
5781#define elf_backend_check_relocs elf32_arm_check_relocs
dc810e39 5782#define elf_backend_relocate_section elf32_arm_relocate_section
e489d0ae 5783#define elf_backend_write_section elf32_arm_write_section
252b5132 5784#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5e681ec4 5785#define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
252b5132
RH		 5786#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
5787#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
e489d0ae 5788#define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
252b5132 5789#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
ba96a88f 5790#define elf_backend_post_process_headers elf32_arm_post_process_headers
99e4ae17 5791#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
c178919b 5792#define elf_backend_object_p elf32_arm_object_p
e16bb312 5793#define elf_backend_section_flags elf32_arm_section_flags
40a18ebd
NC		 5794#define elf_backend_fake_sections elf32_arm_fake_sections
5795#define elf_backend_section_from_shdr elf32_arm_section_from_shdr
e16bb312 5796#define elf_backend_final_write_processing elf32_arm_final_write_processing
5e681ec4 5797#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
b7693d02 5798#define elf_backend_symbol_processing elf32_arm_symbol_processing
0beaef2b 5799#define elf_backend_size_info elf32_arm_size_info
b294bdf8
MM		 5800#define elf_backend_modify_segment_map elf32_arm_modify_segment_map
5801#define elf_backend_additional_program_headers \
5802 elf32_arm_additional_program_headers
252b5132 5803
5e681ec4 5804#define elf_backend_can_refcount 1
252b5132
RH		 5805#define elf_backend_can_gc_sections 1
5806#define elf_backend_plt_readonly 1
5807#define elf_backend_want_got_plt 1
5808#define elf_backend_want_plt_sym 0
4e7fd91e
PB		 5809#define elf_backend_may_use_rel_p 1
5810#define elf_backend_may_use_rela_p 0
5811#define elf_backend_default_use_rela_p 0
5812#define elf_backend_rela_normal 0
252b5132 5813
04f7c78d 5814#define elf_backend_got_header_size 12
04f7c78d 5815
252b5132 5816#include "elf32-target.h"
7f266840 5817
4e7fd91e
PB		 5818/* VxWorks Targets */
5819
5820#undef TARGET_LITTLE_SYM
5821#define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
5822#undef TARGET_LITTLE_NAME
5823#define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
5824#undef TARGET_BIG_SYM
5825#define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
5826#undef TARGET_BIG_NAME
5827#define TARGET_BIG_NAME "elf32-bigarm-vxworks"
5828
5829/* Like elf32_arm_link_hash_table_create -- but overrides
5830 appropriately for VxWorks. */
5831static struct bfd_link_hash_table *
5832elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
5833{
5834 struct bfd_link_hash_table *ret;
5835
5836 ret = elf32_arm_link_hash_table_create (abfd);
5837 if (ret)
5838 {
5839 struct elf32_arm_link_hash_table *htab
5840 = (struct elf32_arm_link_hash_table *)ret;
5841 htab->use_rel = 0;
5842 }
5843 return ret;
5844}
5845
5846#undef elf32_bed
5847#define elf32_bed elf32_arm_vxworks_bed
5848
5849#undef bfd_elf32_bfd_link_hash_table_create
5850#define bfd_elf32_bfd_link_hash_table_create \
5851 elf32_arm_vxworks_link_hash_table_create
5852
5853#undef elf_backend_may_use_rel_p
5854#define elf_backend_may_use_rel_p 0
5855#undef elf_backend_may_use_rela_p
5856#define elf_backend_may_use_rela_p 1
5857#undef elf_backend_default_use_rela_p
5858#define elf_backend_default_use_rela_p 1
5859#undef elf_backend_rela_normal
5860#define elf_backend_rela_normal 1
5861
5862#include "elf32-target.h"
5863
5864
7f266840
DJ		 5865/* Symbian OS Targets */
5866
5867#undef TARGET_LITTLE_SYM
5868#define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
5869#undef TARGET_LITTLE_NAME
5870#define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
5871#undef TARGET_BIG_SYM
5872#define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
5873#undef TARGET_BIG_NAME
5874#define TARGET_BIG_NAME "elf32-bigarm-symbian"
5875
5876/* Like elf32_arm_link_hash_table_create -- but overrides
5877 appropriately for Symbian OS. */
5878static struct bfd_link_hash_table *
5879elf32_arm_symbian_link_hash_table_create (bfd *abfd)
5880{
5881 struct bfd_link_hash_table *ret;
5882
5883 ret = elf32_arm_link_hash_table_create (abfd);
5884 if (ret)
5885 {
5886 struct elf32_arm_link_hash_table *htab
5887 = (struct elf32_arm_link_hash_table *)ret;
5888 /* There is no PLT header for Symbian OS. */
5889 htab->plt_header_size = 0;
5890 /* The PLT entries are each three instructions. */
5891 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
5892 htab->symbian_p = 1;
67687978 5893 htab->root.is_relocatable_executable = 1;
7f266840
DJ		 5894 }
5895 return ret;
5896}
5897
7f266840
DJ		 5898static struct bfd_elf_special_section const
5899 elf32_arm_symbian_special_sections[]=
5900{
5cd3778d
MM		 5901 /* In a BPABI executable, the dynamic linking sections do not go in
5902 the loadable read-only segment. The post-linker may wish to
5903 refer to these sections, but they are not part of the final
5904 program image. */
7f266840
DJ		 5905 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
5906 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
5907 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
5908 { ".got", 4, 0, SHT_PROGBITS, 0 },
5909 { ".hash", 5, 0, SHT_HASH, 0 },
5cd3778d
MM		 5910 /* These sections do not need to be writable as the SymbianOS
5911 postlinker will arrange things so that no dynamic relocation is
5912 required. */
5913 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
5914 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
5915 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
7f266840
DJ		 5916 { NULL, 0, 0, 0, 0 }
5917};
5918
c3c76620 5919static void
b34af79c
MM		 5920elf32_arm_symbian_begin_write_processing (bfd *abfd,
5921 struct bfd_link_info *link_info
5922 ATTRIBUTE_UNUSED)
c3c76620
MM		 5923{
5924 /* BPABI objects are never loaded directly by an OS kernel; they are
5925 processed by a postlinker first, into an OS-specific format. If
5926 the D_PAGED bit is set on the file, BFD will align segments on
5927 page boundaries, so that an OS can directly map the file. With
5928 BPABI objects, that just results in wasted space. In addition,
5929 because we clear the D_PAGED bit, map_sections_to_segments will
5930 recognize that the program headers should not be mapped into any
5931 loadable segment. */
5932 abfd->flags &= ~D_PAGED;
5933}
7f266840
DJ		 5934
5935static bfd_boolean
b34af79c 5936elf32_arm_symbian_modify_segment_map (bfd *abfd,
b294bdf8 5937 struct bfd_link_info *info)
7f266840
DJ		 5938{
5939 struct elf_segment_map *m;
5940 asection *dynsec;
5941
7f266840
DJ		 5942 /* BPABI shared libraries and executables should have a PT_DYNAMIC
5943 segment. However, because the .dynamic section is not marked
5944 with SEC_LOAD, the generic ELF code will not create such a
5945 segment. */
5946 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
5947 if (dynsec)
5948 {
5949 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
5950 m->next = elf_tdata (abfd)->segment_map;
5951 elf_tdata (abfd)->segment_map = m;
5952 }
5953
b294bdf8
MM		 5954 /* Also call the generic arm routine. */
5955 return elf32_arm_modify_segment_map (abfd, info);
7f266840
DJ		 5956}
5957
5958#undef elf32_bed
5959#define elf32_bed elf32_arm_symbian_bed
5960
5961/* The dynamic sections are not allocated on SymbianOS; the postlinker
5962 will process them and then discard them. */
5963#undef ELF_DYNAMIC_SEC_FLAGS
5964#define ELF_DYNAMIC_SEC_FLAGS \
5965 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
5966
5967#undef bfd_elf32_bfd_link_hash_table_create
5968#define bfd_elf32_bfd_link_hash_table_create \
5969 elf32_arm_symbian_link_hash_table_create
5970
5971#undef elf_backend_special_sections
5972#define elf_backend_special_sections elf32_arm_symbian_special_sections
5973
c3c76620
MM		 5974#undef elf_backend_begin_write_processing
5975#define elf_backend_begin_write_processing \
5976 elf32_arm_symbian_begin_write_processing
5977
7f266840
DJ		 5978#undef elf_backend_modify_segment_map
5979#define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
5980
5981/* There is no .got section for BPABI objects, and hence no header. */
5982#undef elf_backend_got_header_size
5983#define elf_backend_got_header_size 0
5984
5985/* Similarly, there is no .got.plt section. */
5986#undef elf_backend_want_got_plt
5987#define elf_backend_want_got_plt 0
5988
4e7fd91e
PB		 5989#undef elf_backend_may_use_rel_p
5990#define elf_backend_may_use_rel_p 1
5991#undef elf_backend_may_use_rela_p
5992#define elf_backend_may_use_rela_p 0
5993#undef elf_backend_default_use_rela_p
dc4c9c19 5994#define elf_backend_default_use_rela_p 0
4e7fd91e
PB		 5995#undef elf_backend_rela_normal
5996#define elf_backend_rela_normal 0
5997
7f266840 5998#include "elf32-target.h"
GDB Binutils - Deliverables
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