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* elf32-arm.c (elf32_arm_merge_eabi_attributes): Iterate over all
[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libiberty.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf-vxworks.h"
27 #include "elf/arm.h"
28
29 #ifndef NUM_ELEM
30 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
31 #endif
32
33 /* Return the relocation section associated with NAME. HTAB is the
34 bfd's elf32_arm_link_hash_entry. */
35 #define RELOC_SECTION(HTAB, NAME) \
36 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
37
38 /* Return size of a relocation entry. HTAB is the bfd's
39 elf32_arm_link_hash_entry. */
40 #define RELOC_SIZE(HTAB) \
41 ((HTAB)->use_rel \
42 ? sizeof (Elf32_External_Rel) \
43 : sizeof (Elf32_External_Rela))
44
45 /* Return function to swap relocations in. HTAB is the bfd's
46 elf32_arm_link_hash_entry. */
47 #define SWAP_RELOC_IN(HTAB) \
48 ((HTAB)->use_rel \
49 ? bfd_elf32_swap_reloc_in \
50 : bfd_elf32_swap_reloca_in)
51
52 /* Return function to swap relocations out. HTAB is the bfd's
53 elf32_arm_link_hash_entry. */
54 #define SWAP_RELOC_OUT(HTAB) \
55 ((HTAB)->use_rel \
56 ? bfd_elf32_swap_reloc_out \
57 : bfd_elf32_swap_reloca_out)
58
59 #define elf_info_to_howto 0
60 #define elf_info_to_howto_rel elf32_arm_info_to_howto
61
62 #define ARM_ELF_ABI_VERSION 0
63 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
64
65 static const struct elf_backend_data elf32_arm_vxworks_bed;
66
67 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
68 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
69 in that slot. */
70
71 static reloc_howto_type elf32_arm_howto_table_1[] =
72 {
73 /* No relocation */
74 HOWTO (R_ARM_NONE, /* type */
75 0, /* rightshift */
76 0, /* size (0 = byte, 1 = short, 2 = long) */
77 0, /* bitsize */
78 FALSE, /* pc_relative */
79 0, /* bitpos */
80 complain_overflow_dont,/* complain_on_overflow */
81 bfd_elf_generic_reloc, /* special_function */
82 "R_ARM_NONE", /* name */
83 FALSE, /* partial_inplace */
84 0, /* src_mask */
85 0, /* dst_mask */
86 FALSE), /* pcrel_offset */
87
88 HOWTO (R_ARM_PC24, /* type */
89 2, /* rightshift */
90 2, /* size (0 = byte, 1 = short, 2 = long) */
91 24, /* bitsize */
92 TRUE, /* pc_relative */
93 0, /* bitpos */
94 complain_overflow_signed,/* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_ARM_PC24", /* name */
97 FALSE, /* partial_inplace */
98 0x00ffffff, /* src_mask */
99 0x00ffffff, /* dst_mask */
100 TRUE), /* pcrel_offset */
101
102 /* 32 bit absolute */
103 HOWTO (R_ARM_ABS32, /* type */
104 0, /* rightshift */
105 2, /* size (0 = byte, 1 = short, 2 = long) */
106 32, /* bitsize */
107 FALSE, /* pc_relative */
108 0, /* bitpos */
109 complain_overflow_bitfield,/* complain_on_overflow */
110 bfd_elf_generic_reloc, /* special_function */
111 "R_ARM_ABS32", /* name */
112 FALSE, /* partial_inplace */
113 0xffffffff, /* src_mask */
114 0xffffffff, /* dst_mask */
115 FALSE), /* pcrel_offset */
116
117 /* standard 32bit pc-relative reloc */
118 HOWTO (R_ARM_REL32, /* type */
119 0, /* rightshift */
120 2, /* size (0 = byte, 1 = short, 2 = long) */
121 32, /* bitsize */
122 TRUE, /* pc_relative */
123 0, /* bitpos */
124 complain_overflow_bitfield,/* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_ARM_REL32", /* name */
127 FALSE, /* partial_inplace */
128 0xffffffff, /* src_mask */
129 0xffffffff, /* dst_mask */
130 TRUE), /* pcrel_offset */
131
132 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
133 HOWTO (R_ARM_PC13, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 8, /* bitsize */
137 FALSE, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_bitfield,/* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_ARM_PC13", /* name */
142 FALSE, /* partial_inplace */
143 0x000000ff, /* src_mask */
144 0x000000ff, /* dst_mask */
145 FALSE), /* pcrel_offset */
146
147 /* 16 bit absolute */
148 HOWTO (R_ARM_ABS16, /* type */
149 0, /* rightshift */
150 1, /* size (0 = byte, 1 = short, 2 = long) */
151 16, /* bitsize */
152 FALSE, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_bitfield,/* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_ARM_ABS16", /* name */
157 FALSE, /* partial_inplace */
158 0x0000ffff, /* src_mask */
159 0x0000ffff, /* dst_mask */
160 FALSE), /* pcrel_offset */
161
162 /* 12 bit absolute */
163 HOWTO (R_ARM_ABS12, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 12, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield,/* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_ARM_ABS12", /* name */
172 FALSE, /* partial_inplace */
173 0x00000fff, /* src_mask */
174 0x00000fff, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 HOWTO (R_ARM_THM_ABS5, /* type */
178 6, /* rightshift */
179 1, /* size (0 = byte, 1 = short, 2 = long) */
180 5, /* bitsize */
181 FALSE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_bitfield,/* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_ARM_THM_ABS5", /* name */
186 FALSE, /* partial_inplace */
187 0x000007e0, /* src_mask */
188 0x000007e0, /* dst_mask */
189 FALSE), /* pcrel_offset */
190
191 /* 8 bit absolute */
192 HOWTO (R_ARM_ABS8, /* type */
193 0, /* rightshift */
194 0, /* size (0 = byte, 1 = short, 2 = long) */
195 8, /* bitsize */
196 FALSE, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_bitfield,/* complain_on_overflow */
199 bfd_elf_generic_reloc, /* special_function */
200 "R_ARM_ABS8", /* name */
201 FALSE, /* partial_inplace */
202 0x000000ff, /* src_mask */
203 0x000000ff, /* dst_mask */
204 FALSE), /* pcrel_offset */
205
206 HOWTO (R_ARM_SBREL32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont,/* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_ARM_SBREL32", /* name */
215 FALSE, /* partial_inplace */
216 0xffffffff, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* FIXME: Has two more bits of offset in Thumb32. */
221 HOWTO (R_ARM_THM_CALL, /* type */
222 1, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 23, /* bitsize */
225 TRUE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_signed,/* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_ARM_THM_CALL", /* name */
230 FALSE, /* partial_inplace */
231 0x07ff07ff, /* src_mask */
232 0x07ff07ff, /* dst_mask */
233 TRUE), /* pcrel_offset */
234
235 HOWTO (R_ARM_THM_PC8, /* type */
236 1, /* rightshift */
237 1, /* size (0 = byte, 1 = short, 2 = long) */
238 8, /* bitsize */
239 TRUE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_signed,/* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_ARM_THM_PC8", /* name */
244 FALSE, /* partial_inplace */
245 0x000000ff, /* src_mask */
246 0x000000ff, /* dst_mask */
247 TRUE), /* pcrel_offset */
248
249 HOWTO (R_ARM_BREL_ADJ, /* type */
250 1, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 32, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_signed,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_ARM_BREL_ADJ", /* name */
258 FALSE, /* partial_inplace */
259 0xffffffff, /* src_mask */
260 0xffffffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 HOWTO (R_ARM_SWI24, /* type */
264 0, /* rightshift */
265 0, /* size (0 = byte, 1 = short, 2 = long) */
266 0, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_signed,/* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_ARM_SWI24", /* name */
272 FALSE, /* partial_inplace */
273 0x00000000, /* src_mask */
274 0x00000000, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 HOWTO (R_ARM_THM_SWI8, /* type */
278 0, /* rightshift */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_signed,/* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_ARM_SWI8", /* name */
286 FALSE, /* partial_inplace */
287 0x00000000, /* src_mask */
288 0x00000000, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* BLX instruction for the ARM. */
292 HOWTO (R_ARM_XPC25, /* type */
293 2, /* rightshift */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
295 25, /* bitsize */
296 TRUE, /* pc_relative */
297 0, /* bitpos */
298 complain_overflow_signed,/* complain_on_overflow */
299 bfd_elf_generic_reloc, /* special_function */
300 "R_ARM_XPC25", /* name */
301 FALSE, /* partial_inplace */
302 0x00ffffff, /* src_mask */
303 0x00ffffff, /* dst_mask */
304 TRUE), /* pcrel_offset */
305
306 /* BLX instruction for the Thumb. */
307 HOWTO (R_ARM_THM_XPC22, /* type */
308 2, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 22, /* bitsize */
311 TRUE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_signed,/* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_ARM_THM_XPC22", /* name */
316 FALSE, /* partial_inplace */
317 0x07ff07ff, /* src_mask */
318 0x07ff07ff, /* dst_mask */
319 TRUE), /* pcrel_offset */
320
321 /* Dynamic TLS relocations. */
322
323 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
324 0, /* rightshift */
325 2, /* size (0 = byte, 1 = short, 2 = long) */
326 32, /* bitsize */
327 FALSE, /* pc_relative */
328 0, /* bitpos */
329 complain_overflow_bitfield,/* complain_on_overflow */
330 bfd_elf_generic_reloc, /* special_function */
331 "R_ARM_TLS_DTPMOD32", /* name */
332 TRUE, /* partial_inplace */
333 0xffffffff, /* src_mask */
334 0xffffffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
336
337 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 32, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield,/* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_ARM_TLS_DTPOFF32", /* name */
346 TRUE, /* partial_inplace */
347 0xffffffff, /* src_mask */
348 0xffffffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 HOWTO (R_ARM_TLS_TPOFF32, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 32, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_bitfield,/* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_ARM_TLS_TPOFF32", /* name */
360 TRUE, /* partial_inplace */
361 0xffffffff, /* src_mask */
362 0xffffffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* Relocs used in ARM Linux */
366
367 HOWTO (R_ARM_COPY, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 32, /* bitsize */
371 FALSE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_bitfield,/* complain_on_overflow */
374 bfd_elf_generic_reloc, /* special_function */
375 "R_ARM_COPY", /* name */
376 TRUE, /* partial_inplace */
377 0xffffffff, /* src_mask */
378 0xffffffff, /* dst_mask */
379 FALSE), /* pcrel_offset */
380
381 HOWTO (R_ARM_GLOB_DAT, /* type */
382 0, /* rightshift */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
384 32, /* bitsize */
385 FALSE, /* pc_relative */
386 0, /* bitpos */
387 complain_overflow_bitfield,/* complain_on_overflow */
388 bfd_elf_generic_reloc, /* special_function */
389 "R_ARM_GLOB_DAT", /* name */
390 TRUE, /* partial_inplace */
391 0xffffffff, /* src_mask */
392 0xffffffff, /* dst_mask */
393 FALSE), /* pcrel_offset */
394
395 HOWTO (R_ARM_JUMP_SLOT, /* type */
396 0, /* rightshift */
397 2, /* size (0 = byte, 1 = short, 2 = long) */
398 32, /* bitsize */
399 FALSE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_bitfield,/* complain_on_overflow */
402 bfd_elf_generic_reloc, /* special_function */
403 "R_ARM_JUMP_SLOT", /* name */
404 TRUE, /* partial_inplace */
405 0xffffffff, /* src_mask */
406 0xffffffff, /* dst_mask */
407 FALSE), /* pcrel_offset */
408
409 HOWTO (R_ARM_RELATIVE, /* type */
410 0, /* rightshift */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
412 32, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_bitfield,/* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_ARM_RELATIVE", /* name */
418 TRUE, /* partial_inplace */
419 0xffffffff, /* src_mask */
420 0xffffffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 HOWTO (R_ARM_GOTOFF32, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield,/* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_ARM_GOTOFF32", /* name */
432 TRUE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 HOWTO (R_ARM_GOTPC, /* type */
438 0, /* rightshift */
439 2, /* size (0 = byte, 1 = short, 2 = long) */
440 32, /* bitsize */
441 TRUE, /* pc_relative */
442 0, /* bitpos */
443 complain_overflow_bitfield,/* complain_on_overflow */
444 bfd_elf_generic_reloc, /* special_function */
445 "R_ARM_GOTPC", /* name */
446 TRUE, /* partial_inplace */
447 0xffffffff, /* src_mask */
448 0xffffffff, /* dst_mask */
449 TRUE), /* pcrel_offset */
450
451 HOWTO (R_ARM_GOT32, /* type */
452 0, /* rightshift */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
454 32, /* bitsize */
455 FALSE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_bitfield,/* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 "R_ARM_GOT32", /* name */
460 TRUE, /* partial_inplace */
461 0xffffffff, /* src_mask */
462 0xffffffff, /* dst_mask */
463 FALSE), /* pcrel_offset */
464
465 HOWTO (R_ARM_PLT32, /* type */
466 2, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 24, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_bitfield,/* complain_on_overflow */
472 bfd_elf_generic_reloc, /* special_function */
473 "R_ARM_PLT32", /* name */
474 FALSE, /* partial_inplace */
475 0x00ffffff, /* src_mask */
476 0x00ffffff, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 HOWTO (R_ARM_CALL, /* type */
480 2, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 24, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed,/* complain_on_overflow */
486 bfd_elf_generic_reloc, /* special_function */
487 "R_ARM_CALL", /* name */
488 FALSE, /* partial_inplace */
489 0x00ffffff, /* src_mask */
490 0x00ffffff, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 HOWTO (R_ARM_JUMP24, /* type */
494 2, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 24, /* bitsize */
497 TRUE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_signed,/* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_ARM_JUMP24", /* name */
502 FALSE, /* partial_inplace */
503 0x00ffffff, /* src_mask */
504 0x00ffffff, /* dst_mask */
505 TRUE), /* pcrel_offset */
506
507 HOWTO (R_ARM_THM_JUMP24, /* type */
508 1, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 24, /* bitsize */
511 TRUE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_signed,/* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_ARM_THM_JUMP24", /* name */
516 FALSE, /* partial_inplace */
517 0x07ff2fff, /* src_mask */
518 0x07ff2fff, /* dst_mask */
519 TRUE), /* pcrel_offset */
520
521 HOWTO (R_ARM_BASE_ABS, /* type */
522 0, /* rightshift */
523 2, /* size (0 = byte, 1 = short, 2 = long) */
524 32, /* bitsize */
525 FALSE, /* pc_relative */
526 0, /* bitpos */
527 complain_overflow_dont,/* complain_on_overflow */
528 bfd_elf_generic_reloc, /* special_function */
529 "R_ARM_BASE_ABS", /* name */
530 FALSE, /* partial_inplace */
531 0xffffffff, /* src_mask */
532 0xffffffff, /* dst_mask */
533 FALSE), /* pcrel_offset */
534
535 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
536 0, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 12, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont,/* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_ARM_ALU_PCREL_7_0", /* name */
544 FALSE, /* partial_inplace */
545 0x00000fff, /* src_mask */
546 0x00000fff, /* dst_mask */
547 TRUE), /* pcrel_offset */
548
549 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
550 0, /* rightshift */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
552 12, /* bitsize */
553 TRUE, /* pc_relative */
554 8, /* bitpos */
555 complain_overflow_dont,/* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 "R_ARM_ALU_PCREL_15_8",/* name */
558 FALSE, /* partial_inplace */
559 0x00000fff, /* src_mask */
560 0x00000fff, /* dst_mask */
561 TRUE), /* pcrel_offset */
562
563 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 12, /* bitsize */
567 TRUE, /* pc_relative */
568 16, /* bitpos */
569 complain_overflow_dont,/* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_ARM_ALU_PCREL_23_15",/* name */
572 FALSE, /* partial_inplace */
573 0x00000fff, /* src_mask */
574 0x00000fff, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
578 0, /* rightshift */
579 2, /* size (0 = byte, 1 = short, 2 = long) */
580 12, /* bitsize */
581 FALSE, /* pc_relative */
582 0, /* bitpos */
583 complain_overflow_dont,/* complain_on_overflow */
584 bfd_elf_generic_reloc, /* special_function */
585 "R_ARM_LDR_SBREL_11_0",/* name */
586 FALSE, /* partial_inplace */
587 0x00000fff, /* src_mask */
588 0x00000fff, /* dst_mask */
589 FALSE), /* pcrel_offset */
590
591 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
592 0, /* rightshift */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
594 8, /* bitsize */
595 FALSE, /* pc_relative */
596 12, /* bitpos */
597 complain_overflow_dont,/* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_ARM_ALU_SBREL_19_12",/* name */
600 FALSE, /* partial_inplace */
601 0x000ff000, /* src_mask */
602 0x000ff000, /* dst_mask */
603 FALSE), /* pcrel_offset */
604
605 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 8, /* bitsize */
609 FALSE, /* pc_relative */
610 20, /* bitpos */
611 complain_overflow_dont,/* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_ARM_ALU_SBREL_27_20",/* name */
614 FALSE, /* partial_inplace */
615 0x0ff00000, /* src_mask */
616 0x0ff00000, /* dst_mask */
617 FALSE), /* pcrel_offset */
618
619 HOWTO (R_ARM_TARGET1, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont,/* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_ARM_TARGET1", /* name */
628 FALSE, /* partial_inplace */
629 0xffffffff, /* src_mask */
630 0xffffffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 HOWTO (R_ARM_ROSEGREL32, /* type */
634 0, /* rightshift */
635 2, /* size (0 = byte, 1 = short, 2 = long) */
636 32, /* bitsize */
637 FALSE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_dont,/* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
641 "R_ARM_ROSEGREL32", /* name */
642 FALSE, /* partial_inplace */
643 0xffffffff, /* src_mask */
644 0xffffffff, /* dst_mask */
645 FALSE), /* pcrel_offset */
646
647 HOWTO (R_ARM_V4BX, /* type */
648 0, /* rightshift */
649 2, /* size (0 = byte, 1 = short, 2 = long) */
650 32, /* bitsize */
651 FALSE, /* pc_relative */
652 0, /* bitpos */
653 complain_overflow_dont,/* complain_on_overflow */
654 bfd_elf_generic_reloc, /* special_function */
655 "R_ARM_V4BX", /* name */
656 FALSE, /* partial_inplace */
657 0xffffffff, /* src_mask */
658 0xffffffff, /* dst_mask */
659 FALSE), /* pcrel_offset */
660
661 HOWTO (R_ARM_TARGET2, /* type */
662 0, /* rightshift */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
664 32, /* bitsize */
665 FALSE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_signed,/* complain_on_overflow */
668 bfd_elf_generic_reloc, /* special_function */
669 "R_ARM_TARGET2", /* name */
670 FALSE, /* partial_inplace */
671 0xffffffff, /* src_mask */
672 0xffffffff, /* dst_mask */
673 TRUE), /* pcrel_offset */
674
675 HOWTO (R_ARM_PREL31, /* type */
676 0, /* rightshift */
677 2, /* size (0 = byte, 1 = short, 2 = long) */
678 31, /* bitsize */
679 TRUE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed,/* complain_on_overflow */
682 bfd_elf_generic_reloc, /* special_function */
683 "R_ARM_PREL31", /* name */
684 FALSE, /* partial_inplace */
685 0x7fffffff, /* src_mask */
686 0x7fffffff, /* dst_mask */
687 TRUE), /* pcrel_offset */
688
689 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
690 0, /* rightshift */
691 2, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont,/* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_ARM_MOVW_ABS_NC", /* name */
698 FALSE, /* partial_inplace */
699 0x0000ffff, /* src_mask */
700 0x0000ffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 HOWTO (R_ARM_MOVT_ABS, /* type */
704 0, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_bitfield,/* complain_on_overflow */
710 bfd_elf_generic_reloc, /* special_function */
711 "R_ARM_MOVT_ABS", /* name */
712 FALSE, /* partial_inplace */
713 0x0000ffff, /* src_mask */
714 0x0000ffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
718 0, /* rightshift */
719 2, /* size (0 = byte, 1 = short, 2 = long) */
720 16, /* bitsize */
721 TRUE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_dont,/* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_ARM_MOVW_PREL_NC", /* name */
726 FALSE, /* partial_inplace */
727 0x0000ffff, /* src_mask */
728 0x0000ffff, /* dst_mask */
729 TRUE), /* pcrel_offset */
730
731 HOWTO (R_ARM_MOVT_PREL, /* type */
732 0, /* rightshift */
733 2, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 TRUE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_bitfield,/* complain_on_overflow */
738 bfd_elf_generic_reloc, /* special_function */
739 "R_ARM_MOVT_PREL", /* name */
740 FALSE, /* partial_inplace */
741 0x0000ffff, /* src_mask */
742 0x0000ffff, /* dst_mask */
743 TRUE), /* pcrel_offset */
744
745 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
746 0, /* rightshift */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont,/* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 "R_ARM_THM_MOVW_ABS_NC",/* name */
754 FALSE, /* partial_inplace */
755 0x040f70ff, /* src_mask */
756 0x040f70ff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
760 0, /* rightshift */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_bitfield,/* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_ARM_THM_MOVT_ABS", /* name */
768 FALSE, /* partial_inplace */
769 0x040f70ff, /* src_mask */
770 0x040f70ff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 16, /* bitsize */
777 TRUE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont,/* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_ARM_THM_MOVW_PREL_NC",/* name */
782 FALSE, /* partial_inplace */
783 0x040f70ff, /* src_mask */
784 0x040f70ff, /* dst_mask */
785 TRUE), /* pcrel_offset */
786
787 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 TRUE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_bitfield,/* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_ARM_THM_MOVT_PREL", /* name */
796 FALSE, /* partial_inplace */
797 0x040f70ff, /* src_mask */
798 0x040f70ff, /* dst_mask */
799 TRUE), /* pcrel_offset */
800
801 HOWTO (R_ARM_THM_JUMP19, /* type */
802 1, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 19, /* bitsize */
805 TRUE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_signed,/* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_ARM_THM_JUMP19", /* name */
810 FALSE, /* partial_inplace */
811 0x043f2fff, /* src_mask */
812 0x043f2fff, /* dst_mask */
813 TRUE), /* pcrel_offset */
814
815 HOWTO (R_ARM_THM_JUMP6, /* type */
816 1, /* rightshift */
817 1, /* size (0 = byte, 1 = short, 2 = long) */
818 6, /* bitsize */
819 TRUE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_unsigned,/* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_ARM_THM_JUMP6", /* name */
824 FALSE, /* partial_inplace */
825 0x02f8, /* src_mask */
826 0x02f8, /* dst_mask */
827 TRUE), /* pcrel_offset */
828
829 /* These are declared as 13-bit signed relocations because we can
830 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
831 versa. */
832 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
833 0, /* rightshift */
834 2, /* size (0 = byte, 1 = short, 2 = long) */
835 13, /* bitsize */
836 TRUE, /* pc_relative */
837 0, /* bitpos */
838 complain_overflow_signed,/* complain_on_overflow */
839 bfd_elf_generic_reloc, /* special_function */
840 "R_ARM_THM_ALU_PREL_11_0",/* name */
841 FALSE, /* partial_inplace */
842 0x040070ff, /* src_mask */
843 0x040070ff, /* dst_mask */
844 TRUE), /* pcrel_offset */
845
846 HOWTO (R_ARM_THM_PC12, /* type */
847 0, /* rightshift */
848 2, /* size (0 = byte, 1 = short, 2 = long) */
849 13, /* bitsize */
850 TRUE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_signed,/* complain_on_overflow */
853 bfd_elf_generic_reloc, /* special_function */
854 "R_ARM_THM_PC12", /* name */
855 FALSE, /* partial_inplace */
856 0x040070ff, /* src_mask */
857 0x040070ff, /* dst_mask */
858 TRUE), /* pcrel_offset */
859
860 HOWTO (R_ARM_ABS32_NOI, /* type */
861 0, /* rightshift */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
863 32, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont,/* complain_on_overflow */
867 bfd_elf_generic_reloc, /* special_function */
868 "R_ARM_ABS32_NOI", /* name */
869 FALSE, /* partial_inplace */
870 0xffffffff, /* src_mask */
871 0xffffffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 HOWTO (R_ARM_REL32_NOI, /* type */
875 0, /* rightshift */
876 2, /* size (0 = byte, 1 = short, 2 = long) */
877 32, /* bitsize */
878 TRUE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont,/* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_ARM_REL32_NOI", /* name */
883 FALSE, /* partial_inplace */
884 0xffffffff, /* src_mask */
885 0xffffffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887 };
888
889 /* Relocations 57 .. 83 are the "group relocations" which we do not
890 support. */
891
892 static reloc_howto_type elf32_arm_howto_table_2[] =
893 {
894 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
895 0, /* rightshift */
896 2, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont,/* complain_on_overflow */
901 bfd_elf_generic_reloc, /* special_function */
902 "R_ARM_MOVW_BREL_NC", /* name */
903 FALSE, /* partial_inplace */
904 0x0000ffff, /* src_mask */
905 0x0000ffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 HOWTO (R_ARM_MOVT_BREL, /* type */
909 0, /* rightshift */
910 2, /* size (0 = byte, 1 = short, 2 = long) */
911 16, /* bitsize */
912 FALSE, /* pc_relative */
913 0, /* bitpos */
914 complain_overflow_bitfield,/* complain_on_overflow */
915 bfd_elf_generic_reloc, /* special_function */
916 "R_ARM_MOVT_BREL", /* name */
917 FALSE, /* partial_inplace */
918 0x0000ffff, /* src_mask */
919 0x0000ffff, /* dst_mask */
920 FALSE), /* pcrel_offset */
921
922 HOWTO (R_ARM_MOVW_BREL, /* type */
923 0, /* rightshift */
924 2, /* size (0 = byte, 1 = short, 2 = long) */
925 16, /* bitsize */
926 FALSE, /* pc_relative */
927 0, /* bitpos */
928 complain_overflow_dont,/* complain_on_overflow */
929 bfd_elf_generic_reloc, /* special_function */
930 "R_ARM_MOVW_BREL", /* name */
931 FALSE, /* partial_inplace */
932 0x0000ffff, /* src_mask */
933 0x0000ffff, /* dst_mask */
934 FALSE), /* pcrel_offset */
935
936 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
937 0, /* rightshift */
938 2, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_dont,/* complain_on_overflow */
943 bfd_elf_generic_reloc, /* special_function */
944 "R_ARM_THM_MOVW_BREL_NC",/* name */
945 FALSE, /* partial_inplace */
946 0x040f70ff, /* src_mask */
947 0x040f70ff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
951 0, /* rightshift */
952 2, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_bitfield,/* complain_on_overflow */
957 bfd_elf_generic_reloc, /* special_function */
958 "R_ARM_THM_MOVT_BREL", /* name */
959 FALSE, /* partial_inplace */
960 0x040f70ff, /* src_mask */
961 0x040f70ff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
965 0, /* rightshift */
966 2, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_dont,/* complain_on_overflow */
971 bfd_elf_generic_reloc, /* special_function */
972 "R_ARM_THM_MOVW_BREL", /* name */
973 FALSE, /* partial_inplace */
974 0x040f70ff, /* src_mask */
975 0x040f70ff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 EMPTY_HOWTO (90), /* unallocated */
979 EMPTY_HOWTO (91),
980 EMPTY_HOWTO (92),
981 EMPTY_HOWTO (93),
982
983 HOWTO (R_ARM_PLT32_ABS, /* type */
984 0, /* rightshift */
985 2, /* size (0 = byte, 1 = short, 2 = long) */
986 32, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_dont,/* complain_on_overflow */
990 bfd_elf_generic_reloc, /* special_function */
991 "R_ARM_PLT32_ABS", /* name */
992 FALSE, /* partial_inplace */
993 0xffffffff, /* src_mask */
994 0xffffffff, /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 HOWTO (R_ARM_GOT_ABS, /* type */
998 0, /* rightshift */
999 2, /* size (0 = byte, 1 = short, 2 = long) */
1000 32, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_dont,/* complain_on_overflow */
1004 bfd_elf_generic_reloc, /* special_function */
1005 "R_ARM_GOT_ABS", /* name */
1006 FALSE, /* partial_inplace */
1007 0xffffffff, /* src_mask */
1008 0xffffffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 HOWTO (R_ARM_GOT_PREL, /* type */
1012 0, /* rightshift */
1013 2, /* size (0 = byte, 1 = short, 2 = long) */
1014 32, /* bitsize */
1015 TRUE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 bfd_elf_generic_reloc, /* special_function */
1019 "R_ARM_GOT_PREL", /* name */
1020 FALSE, /* partial_inplace */
1021 0xffffffff, /* src_mask */
1022 0xffffffff, /* dst_mask */
1023 TRUE), /* pcrel_offset */
1024
1025 HOWTO (R_ARM_GOT_BREL12, /* type */
1026 0, /* rightshift */
1027 2, /* size (0 = byte, 1 = short, 2 = long) */
1028 12, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_bitfield,/* complain_on_overflow */
1032 bfd_elf_generic_reloc, /* special_function */
1033 "R_ARM_GOT_BREL12", /* name */
1034 FALSE, /* partial_inplace */
1035 0x00000fff, /* src_mask */
1036 0x00000fff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 HOWTO (R_ARM_GOTOFF12, /* type */
1040 0, /* rightshift */
1041 2, /* size (0 = byte, 1 = short, 2 = long) */
1042 12, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_bitfield,/* complain_on_overflow */
1046 bfd_elf_generic_reloc, /* special_function */
1047 "R_ARM_GOTOFF12", /* name */
1048 FALSE, /* partial_inplace */
1049 0x00000fff, /* src_mask */
1050 0x00000fff, /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1054
1055 /* GNU extension to record C++ vtable member usage */
1056 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1057 0, /* rightshift */
1058 2, /* size (0 = byte, 1 = short, 2 = long) */
1059 0, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont, /* complain_on_overflow */
1063 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1064 "R_ARM_GNU_VTENTRY", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* GNU extension to record C++ vtable hierarchy */
1071 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1072 0, /* rightshift */
1073 2, /* size (0 = byte, 1 = short, 2 = long) */
1074 0, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_dont, /* complain_on_overflow */
1078 NULL, /* special_function */
1079 "R_ARM_GNU_VTINHERIT", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 HOWTO (R_ARM_THM_JUMP11, /* type */
1086 1, /* rightshift */
1087 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 11, /* bitsize */
1089 TRUE, /* pc_relative */
1090 0, /* bitpos */
1091 complain_overflow_signed, /* complain_on_overflow */
1092 bfd_elf_generic_reloc, /* special_function */
1093 "R_ARM_THM_JUMP11", /* name */
1094 FALSE, /* partial_inplace */
1095 0x000007ff, /* src_mask */
1096 0x000007ff, /* dst_mask */
1097 TRUE), /* pcrel_offset */
1098
1099 HOWTO (R_ARM_THM_JUMP8, /* type */
1100 1, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 8, /* bitsize */
1103 TRUE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_signed, /* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_ARM_THM_JUMP8", /* name */
1108 FALSE, /* partial_inplace */
1109 0x000000ff, /* src_mask */
1110 0x000000ff, /* dst_mask */
1111 TRUE), /* pcrel_offset */
1112
1113 /* TLS relocations */
1114 HOWTO (R_ARM_TLS_GD32, /* type */
1115 0, /* rightshift */
1116 2, /* size (0 = byte, 1 = short, 2 = long) */
1117 32, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_bitfield,/* complain_on_overflow */
1121 NULL, /* special_function */
1122 "R_ARM_TLS_GD32", /* name */
1123 TRUE, /* partial_inplace */
1124 0xffffffff, /* src_mask */
1125 0xffffffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 HOWTO (R_ARM_TLS_LDM32, /* type */
1129 0, /* rightshift */
1130 2, /* size (0 = byte, 1 = short, 2 = long) */
1131 32, /* bitsize */
1132 FALSE, /* pc_relative */
1133 0, /* bitpos */
1134 complain_overflow_bitfield,/* complain_on_overflow */
1135 bfd_elf_generic_reloc, /* special_function */
1136 "R_ARM_TLS_LDM32", /* name */
1137 TRUE, /* partial_inplace */
1138 0xffffffff, /* src_mask */
1139 0xffffffff, /* dst_mask */
1140 FALSE), /* pcrel_offset */
1141
1142 HOWTO (R_ARM_TLS_LDO32, /* type */
1143 0, /* rightshift */
1144 2, /* size (0 = byte, 1 = short, 2 = long) */
1145 32, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_bitfield,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_ARM_TLS_LDO32", /* name */
1151 TRUE, /* partial_inplace */
1152 0xffffffff, /* src_mask */
1153 0xffffffff, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 HOWTO (R_ARM_TLS_IE32, /* type */
1157 0, /* rightshift */
1158 2, /* size (0 = byte, 1 = short, 2 = long) */
1159 32, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_bitfield,/* complain_on_overflow */
1163 NULL, /* special_function */
1164 "R_ARM_TLS_IE32", /* name */
1165 TRUE, /* partial_inplace */
1166 0xffffffff, /* src_mask */
1167 0xffffffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 HOWTO (R_ARM_TLS_LE32, /* type */
1171 0, /* rightshift */
1172 2, /* size (0 = byte, 1 = short, 2 = long) */
1173 32, /* bitsize */
1174 FALSE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_bitfield,/* complain_on_overflow */
1177 bfd_elf_generic_reloc, /* special_function */
1178 "R_ARM_TLS_LE32", /* name */
1179 TRUE, /* partial_inplace */
1180 0xffffffff, /* src_mask */
1181 0xffffffff, /* dst_mask */
1182 FALSE), /* pcrel_offset */
1183
1184 HOWTO (R_ARM_TLS_LDO12, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 12, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_bitfield,/* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_ARM_TLS_LDO12", /* name */
1193 FALSE, /* partial_inplace */
1194 0x00000fff, /* src_mask */
1195 0x00000fff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 HOWTO (R_ARM_TLS_LE12, /* type */
1199 0, /* rightshift */
1200 2, /* size (0 = byte, 1 = short, 2 = long) */
1201 12, /* bitsize */
1202 FALSE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_bitfield,/* complain_on_overflow */
1205 bfd_elf_generic_reloc, /* special_function */
1206 "R_ARM_TLS_LE12", /* name */
1207 FALSE, /* partial_inplace */
1208 0x00000fff, /* src_mask */
1209 0x00000fff, /* dst_mask */
1210 FALSE), /* pcrel_offset */
1211
1212 HOWTO (R_ARM_TLS_IE12GP, /* type */
1213 0, /* rightshift */
1214 2, /* size (0 = byte, 1 = short, 2 = long) */
1215 12, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_bitfield,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_ARM_TLS_IE12GP", /* name */
1221 FALSE, /* partial_inplace */
1222 0x00000fff, /* src_mask */
1223 0x00000fff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225 };
1226
1227 /* 112-127 private relocations
1228 128 R_ARM_ME_TOO, obsolete
1229 129-255 unallocated in AAELF.
1230
1231 249-255 extended, currently unused, relocations: */
1232
1233 static reloc_howto_type elf32_arm_howto_table_3[4] =
1234 {
1235 HOWTO (R_ARM_RREL32, /* type */
1236 0, /* rightshift */
1237 0, /* size (0 = byte, 1 = short, 2 = long) */
1238 0, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont,/* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_ARM_RREL32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 HOWTO (R_ARM_RABS32, /* type */
1250 0, /* rightshift */
1251 0, /* size (0 = byte, 1 = short, 2 = long) */
1252 0, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_dont,/* complain_on_overflow */
1256 bfd_elf_generic_reloc, /* special_function */
1257 "R_ARM_RABS32", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 HOWTO (R_ARM_RPC24, /* type */
1264 0, /* rightshift */
1265 0, /* size (0 = byte, 1 = short, 2 = long) */
1266 0, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_dont,/* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_ARM_RPC24", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 HOWTO (R_ARM_RBASE, /* type */
1278 0, /* rightshift */
1279 0, /* size (0 = byte, 1 = short, 2 = long) */
1280 0, /* bitsize */
1281 FALSE, /* pc_relative */
1282 0, /* bitpos */
1283 complain_overflow_dont,/* complain_on_overflow */
1284 bfd_elf_generic_reloc, /* special_function */
1285 "R_ARM_RBASE", /* name */
1286 FALSE, /* partial_inplace */
1287 0, /* src_mask */
1288 0, /* dst_mask */
1289 FALSE) /* pcrel_offset */
1290 };
1291
1292 static reloc_howto_type *
1293 elf32_arm_howto_from_type (unsigned int r_type)
1294 {
1295 if (r_type < NUM_ELEM (elf32_arm_howto_table_1))
1296 return &elf32_arm_howto_table_1[r_type];
1297
1298 if (r_type >= R_ARM_MOVW_BREL_NC
1299 && r_type < R_ARM_MOVW_BREL_NC + NUM_ELEM (elf32_arm_howto_table_2))
1300 return &elf32_arm_howto_table_2[r_type - R_ARM_MOVW_BREL_NC];
1301
1302 if (r_type >= R_ARM_RREL32
1303 && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2))
1304 return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32];
1305
1306 return NULL;
1307 }
1308
1309 static void
1310 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1311 Elf_Internal_Rela * elf_reloc)
1312 {
1313 unsigned int r_type;
1314
1315 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1316 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1317 }
1318
1319 struct elf32_arm_reloc_map
1320 {
1321 bfd_reloc_code_real_type bfd_reloc_val;
1322 unsigned char elf_reloc_val;
1323 };
1324
1325 /* All entries in this list must also be present in elf32_arm_howto_table. */
1326 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1327 {
1328 {BFD_RELOC_NONE, R_ARM_NONE},
1329 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1330 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1331 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1332 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1333 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1334 {BFD_RELOC_32, R_ARM_ABS32},
1335 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1336 {BFD_RELOC_8, R_ARM_ABS8},
1337 {BFD_RELOC_16, R_ARM_ABS16},
1338 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1339 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1340 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1341 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1342 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1343 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1344 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1345 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1346 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1347 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1348 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1349 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1350 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1351 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1352 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1353 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1354 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1355 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1356 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1357 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1358 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1359 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1360 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1361 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1362 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1363 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1364 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1365 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1366 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1367 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1368 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1369 };
1370
1371 static reloc_howto_type *
1372 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1373 bfd_reloc_code_real_type code)
1374 {
1375 unsigned int i;
1376 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1377 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1378 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1379
1380 return NULL;
1381 }
1382
1383 /* Support for core dump NOTE sections */
1384 static bfd_boolean
1385 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1386 {
1387 int offset;
1388 size_t size;
1389
1390 switch (note->descsz)
1391 {
1392 default:
1393 return FALSE;
1394
1395 case 148: /* Linux/ARM 32-bit*/
1396 /* pr_cursig */
1397 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1398
1399 /* pr_pid */
1400 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1401
1402 /* pr_reg */
1403 offset = 72;
1404 size = 72;
1405
1406 break;
1407 }
1408
1409 /* Make a ".reg/999" section. */
1410 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1411 size, note->descpos + offset);
1412 }
1413
1414 static bfd_boolean
1415 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1416 {
1417 switch (note->descsz)
1418 {
1419 default:
1420 return FALSE;
1421
1422 case 124: /* Linux/ARM elf_prpsinfo */
1423 elf_tdata (abfd)->core_program
1424 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1425 elf_tdata (abfd)->core_command
1426 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1427 }
1428
1429 /* Note that for some reason, a spurious space is tacked
1430 onto the end of the args in some (at least one anyway)
1431 implementations, so strip it off if it exists. */
1432
1433 {
1434 char *command = elf_tdata (abfd)->core_command;
1435 int n = strlen (command);
1436
1437 if (0 < n && command[n - 1] == ' ')
1438 command[n - 1] = '\0';
1439 }
1440
1441 return TRUE;
1442 }
1443
1444 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1445 #define TARGET_LITTLE_NAME "elf32-littlearm"
1446 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1447 #define TARGET_BIG_NAME "elf32-bigarm"
1448
1449 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1450 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1451
1452 typedef unsigned long int insn32;
1453 typedef unsigned short int insn16;
1454
1455 /* In lieu of proper flags, assume all EABIv4 or later objects are
1456 interworkable. */
1457 #define INTERWORK_FLAG(abfd) \
1458 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1459 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1460
1461 /* The linker script knows the section names for placement.
1462 The entry_names are used to do simple name mangling on the stubs.
1463 Given a function name, and its type, the stub can be found. The
1464 name can be changed. The only requirement is the %s be present. */
1465 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1466 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1467
1468 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1469 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1470
1471 /* The name of the dynamic interpreter. This is put in the .interp
1472 section. */
1473 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1474
1475 #ifdef FOUR_WORD_PLT
1476
1477 /* The first entry in a procedure linkage table looks like
1478 this. It is set up so that any shared library function that is
1479 called before the relocation has been set up calls the dynamic
1480 linker first. */
1481 static const bfd_vma elf32_arm_plt0_entry [] =
1482 {
1483 0xe52de004, /* str lr, [sp, #-4]! */
1484 0xe59fe010, /* ldr lr, [pc, #16] */
1485 0xe08fe00e, /* add lr, pc, lr */
1486 0xe5bef008, /* ldr pc, [lr, #8]! */
1487 };
1488
1489 /* Subsequent entries in a procedure linkage table look like
1490 this. */
1491 static const bfd_vma elf32_arm_plt_entry [] =
1492 {
1493 0xe28fc600, /* add ip, pc, #NN */
1494 0xe28cca00, /* add ip, ip, #NN */
1495 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1496 0x00000000, /* unused */
1497 };
1498
1499 #else
1500
1501 /* The first entry in a procedure linkage table looks like
1502 this. It is set up so that any shared library function that is
1503 called before the relocation has been set up calls the dynamic
1504 linker first. */
1505 static const bfd_vma elf32_arm_plt0_entry [] =
1506 {
1507 0xe52de004, /* str lr, [sp, #-4]! */
1508 0xe59fe004, /* ldr lr, [pc, #4] */
1509 0xe08fe00e, /* add lr, pc, lr */
1510 0xe5bef008, /* ldr pc, [lr, #8]! */
1511 0x00000000, /* &GOT[0] - . */
1512 };
1513
1514 /* Subsequent entries in a procedure linkage table look like
1515 this. */
1516 static const bfd_vma elf32_arm_plt_entry [] =
1517 {
1518 0xe28fc600, /* add ip, pc, #0xNN00000 */
1519 0xe28cca00, /* add ip, ip, #0xNN000 */
1520 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1521 };
1522
1523 #endif
1524
1525 /* The format of the first entry in the procedure linkage table
1526 for a VxWorks executable. */
1527 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1528 {
1529 0xe52dc008, /* str ip,[sp,#-8]! */
1530 0xe59fc000, /* ldr ip,[pc] */
1531 0xe59cf008, /* ldr pc,[ip,#8] */
1532 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1533 };
1534
1535 /* The format of subsequent entries in a VxWorks executable. */
1536 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1537 {
1538 0xe59fc000, /* ldr ip,[pc] */
1539 0xe59cf000, /* ldr pc,[ip] */
1540 0x00000000, /* .long @got */
1541 0xe59fc000, /* ldr ip,[pc] */
1542 0xea000000, /* b _PLT */
1543 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1544 };
1545
1546 /* The format of entries in a VxWorks shared library. */
1547 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1548 {
1549 0xe59fc000, /* ldr ip,[pc] */
1550 0xe79cf009, /* ldr pc,[ip,r9] */
1551 0x00000000, /* .long @got */
1552 0xe59fc000, /* ldr ip,[pc] */
1553 0xe599f008, /* ldr pc,[r9,#8] */
1554 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1555 };
1556
1557 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1558 #define PLT_THUMB_STUB_SIZE 4
1559 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1560 {
1561 0x4778, /* bx pc */
1562 0x46c0 /* nop */
1563 };
1564
1565 /* The entries in a PLT when using a DLL-based target with multiple
1566 address spaces. */
1567 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1568 {
1569 0xe51ff004, /* ldr pc, [pc, #-4] */
1570 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1571 };
1572
1573 /* Used to build a map of a section. This is required for mixed-endian
1574 code/data. */
1575
1576 typedef struct elf32_elf_section_map
1577 {
1578 bfd_vma vma;
1579 char type;
1580 }
1581 elf32_arm_section_map;
1582
1583 typedef struct _arm_elf_section_data
1584 {
1585 struct bfd_elf_section_data elf;
1586 unsigned int mapcount;
1587 elf32_arm_section_map *map;
1588 }
1589 _arm_elf_section_data;
1590
1591 #define elf32_arm_section_data(sec) \
1592 ((_arm_elf_section_data *) elf_section_data (sec))
1593
1594 /* The size of the thread control block. */
1595 #define TCB_SIZE 8
1596
1597 #define NUM_KNOWN_ATTRIBUTES 32
1598
1599 typedef struct aeabi_attribute
1600 {
1601 int type;
1602 unsigned int i;
1603 char *s;
1604 } aeabi_attribute;
1605
1606 typedef struct aeabi_attribute_list
1607 {
1608 struct aeabi_attribute_list *next;
1609 int tag;
1610 aeabi_attribute attr;
1611 } aeabi_attribute_list;
1612
1613 struct elf32_arm_obj_tdata
1614 {
1615 struct elf_obj_tdata root;
1616
1617 /* tls_type for each local got entry. */
1618 char *local_got_tls_type;
1619
1620 aeabi_attribute known_eabi_attributes[NUM_KNOWN_ATTRIBUTES];
1621 aeabi_attribute_list *other_eabi_attributes;
1622 };
1623
1624 #define elf32_arm_tdata(abfd) \
1625 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
1626
1627 #define elf32_arm_local_got_tls_type(abfd) \
1628 (elf32_arm_tdata (abfd)->local_got_tls_type)
1629
1630 static bfd_boolean
1631 elf32_arm_mkobject (bfd *abfd)
1632 {
1633 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
1634 abfd->tdata.any = bfd_zalloc (abfd, amt);
1635 if (abfd->tdata.any == NULL)
1636 return FALSE;
1637 return TRUE;
1638 }
1639
1640 /* The ARM linker needs to keep track of the number of relocs that it
1641 decides to copy in check_relocs for each symbol. This is so that
1642 it can discard PC relative relocs if it doesn't need them when
1643 linking with -Bsymbolic. We store the information in a field
1644 extending the regular ELF linker hash table. */
1645
1646 /* This structure keeps track of the number of relocs we have copied
1647 for a given symbol. */
1648 struct elf32_arm_relocs_copied
1649 {
1650 /* Next section. */
1651 struct elf32_arm_relocs_copied * next;
1652 /* A section in dynobj. */
1653 asection * section;
1654 /* Number of relocs copied in this section. */
1655 bfd_size_type count;
1656 /* Number of PC-relative relocs copied in this section. */
1657 bfd_size_type pc_count;
1658 };
1659
1660 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
1661
1662 /* Arm ELF linker hash entry. */
1663 struct elf32_arm_link_hash_entry
1664 {
1665 struct elf_link_hash_entry root;
1666
1667 /* Number of PC relative relocs copied for this symbol. */
1668 struct elf32_arm_relocs_copied * relocs_copied;
1669
1670 /* We reference count Thumb references to a PLT entry separately,
1671 so that we can emit the Thumb trampoline only if needed. */
1672 bfd_signed_vma plt_thumb_refcount;
1673
1674 /* Since PLT entries have variable size if the Thumb prologue is
1675 used, we need to record the index into .got.plt instead of
1676 recomputing it from the PLT offset. */
1677 bfd_signed_vma plt_got_offset;
1678
1679 #define GOT_UNKNOWN 0
1680 #define GOT_NORMAL 1
1681 #define GOT_TLS_GD 2
1682 #define GOT_TLS_IE 4
1683 unsigned char tls_type;
1684 };
1685
1686 /* Traverse an arm ELF linker hash table. */
1687 #define elf32_arm_link_hash_traverse(table, func, info) \
1688 (elf_link_hash_traverse \
1689 (&(table)->root, \
1690 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1691 (info)))
1692
1693 /* Get the ARM elf linker hash table from a link_info structure. */
1694 #define elf32_arm_hash_table(info) \
1695 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1696
1697 /* ARM ELF linker hash table. */
1698 struct elf32_arm_link_hash_table
1699 {
1700 /* The main hash table. */
1701 struct elf_link_hash_table root;
1702
1703 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1704 bfd_size_type thumb_glue_size;
1705
1706 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1707 bfd_size_type arm_glue_size;
1708
1709 /* An arbitrary input BFD chosen to hold the glue sections. */
1710 bfd * bfd_of_glue_owner;
1711
1712 /* Nonzero to output a BE8 image. */
1713 int byteswap_code;
1714
1715 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1716 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1717 int target1_is_rel;
1718
1719 /* The relocation to use for R_ARM_TARGET2 relocations. */
1720 int target2_reloc;
1721
1722 /* Nonzero to fix BX instructions for ARMv4 targets. */
1723 int fix_v4bx;
1724
1725 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
1726 int use_blx;
1727
1728 /* The number of bytes in the initial entry in the PLT. */
1729 bfd_size_type plt_header_size;
1730
1731 /* The number of bytes in the subsequent PLT etries. */
1732 bfd_size_type plt_entry_size;
1733
1734 /* True if the target system is VxWorks. */
1735 int vxworks_p;
1736
1737 /* True if the target system is Symbian OS. */
1738 int symbian_p;
1739
1740 /* True if the target uses REL relocations. */
1741 int use_rel;
1742
1743 /* Short-cuts to get to dynamic linker sections. */
1744 asection *sgot;
1745 asection *sgotplt;
1746 asection *srelgot;
1747 asection *splt;
1748 asection *srelplt;
1749 asection *sdynbss;
1750 asection *srelbss;
1751
1752 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
1753 asection *srelplt2;
1754
1755 /* Data for R_ARM_TLS_LDM32 relocations. */
1756 union {
1757 bfd_signed_vma refcount;
1758 bfd_vma offset;
1759 } tls_ldm_got;
1760
1761 /* Small local sym to section mapping cache. */
1762 struct sym_sec_cache sym_sec;
1763
1764 /* For convenience in allocate_dynrelocs. */
1765 bfd * obfd;
1766 };
1767
1768 /* Create an entry in an ARM ELF linker hash table. */
1769
1770 static struct bfd_hash_entry *
1771 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1772 struct bfd_hash_table * table,
1773 const char * string)
1774 {
1775 struct elf32_arm_link_hash_entry * ret =
1776 (struct elf32_arm_link_hash_entry *) entry;
1777
1778 /* Allocate the structure if it has not already been allocated by a
1779 subclass. */
1780 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1781 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1782 if (ret == NULL)
1783 return (struct bfd_hash_entry *) ret;
1784
1785 /* Call the allocation method of the superclass. */
1786 ret = ((struct elf32_arm_link_hash_entry *)
1787 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1788 table, string));
1789 if (ret != NULL)
1790 {
1791 ret->relocs_copied = NULL;
1792 ret->tls_type = GOT_UNKNOWN;
1793 ret->plt_thumb_refcount = 0;
1794 ret->plt_got_offset = -1;
1795 }
1796
1797 return (struct bfd_hash_entry *) ret;
1798 }
1799
1800 /* Return true if NAME is the name of the relocation section associated
1801 with S. */
1802
1803 static bfd_boolean
1804 reloc_section_p (struct elf32_arm_link_hash_table *htab,
1805 const char *name, asection *s)
1806 {
1807 if (htab->use_rel)
1808 return strncmp (name, ".rel", 4) == 0 && strcmp (s->name, name + 4) == 0;
1809 else
1810 return strncmp (name, ".rela", 5) == 0 && strcmp (s->name, name + 5) == 0;
1811 }
1812
1813 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
1814 shortcuts to them in our hash table. */
1815
1816 static bfd_boolean
1817 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1818 {
1819 struct elf32_arm_link_hash_table *htab;
1820
1821 htab = elf32_arm_hash_table (info);
1822 /* BPABI objects never have a GOT, or associated sections. */
1823 if (htab->symbian_p)
1824 return TRUE;
1825
1826 if (! _bfd_elf_create_got_section (dynobj, info))
1827 return FALSE;
1828
1829 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1830 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1831 if (!htab->sgot || !htab->sgotplt)
1832 abort ();
1833
1834 htab->srelgot = bfd_make_section_with_flags (dynobj,
1835 RELOC_SECTION (htab, ".got"),
1836 (SEC_ALLOC | SEC_LOAD
1837 | SEC_HAS_CONTENTS
1838 | SEC_IN_MEMORY
1839 | SEC_LINKER_CREATED
1840 | SEC_READONLY));
1841 if (htab->srelgot == NULL
1842 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1843 return FALSE;
1844 return TRUE;
1845 }
1846
1847 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
1848 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
1849 hash table. */
1850
1851 static bfd_boolean
1852 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1853 {
1854 struct elf32_arm_link_hash_table *htab;
1855
1856 htab = elf32_arm_hash_table (info);
1857 if (!htab->sgot && !create_got_section (dynobj, info))
1858 return FALSE;
1859
1860 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1861 return FALSE;
1862
1863 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1864 htab->srelplt = bfd_get_section_by_name (dynobj,
1865 RELOC_SECTION (htab, ".plt"));
1866 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1867 if (!info->shared)
1868 htab->srelbss = bfd_get_section_by_name (dynobj,
1869 RELOC_SECTION (htab, ".bss"));
1870
1871 if (htab->vxworks_p)
1872 {
1873 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
1874 return FALSE;
1875
1876 if (info->shared)
1877 {
1878 htab->plt_header_size = 0;
1879 htab->plt_entry_size
1880 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
1881 }
1882 else
1883 {
1884 htab->plt_header_size
1885 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
1886 htab->plt_entry_size
1887 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
1888 }
1889 }
1890
1891 if (!htab->splt
1892 || !htab->srelplt
1893 || !htab->sdynbss
1894 || (!info->shared && !htab->srelbss))
1895 abort ();
1896
1897 return TRUE;
1898 }
1899
1900 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1901
1902 static void
1903 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
1904 struct elf_link_hash_entry *dir,
1905 struct elf_link_hash_entry *ind)
1906 {
1907 struct elf32_arm_link_hash_entry *edir, *eind;
1908
1909 edir = (struct elf32_arm_link_hash_entry *) dir;
1910 eind = (struct elf32_arm_link_hash_entry *) ind;
1911
1912 if (eind->relocs_copied != NULL)
1913 {
1914 if (edir->relocs_copied != NULL)
1915 {
1916 struct elf32_arm_relocs_copied **pp;
1917 struct elf32_arm_relocs_copied *p;
1918
1919 /* Add reloc counts against the indirect sym to the direct sym
1920 list. Merge any entries against the same section. */
1921 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1922 {
1923 struct elf32_arm_relocs_copied *q;
1924
1925 for (q = edir->relocs_copied; q != NULL; q = q->next)
1926 if (q->section == p->section)
1927 {
1928 q->pc_count += p->pc_count;
1929 q->count += p->count;
1930 *pp = p->next;
1931 break;
1932 }
1933 if (q == NULL)
1934 pp = &p->next;
1935 }
1936 *pp = edir->relocs_copied;
1937 }
1938
1939 edir->relocs_copied = eind->relocs_copied;
1940 eind->relocs_copied = NULL;
1941 }
1942
1943 /* Copy over PLT info. */
1944 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
1945 eind->plt_thumb_refcount = 0;
1946
1947 if (ind->root.type == bfd_link_hash_indirect
1948 && dir->got.refcount <= 0)
1949 {
1950 edir->tls_type = eind->tls_type;
1951 eind->tls_type = GOT_UNKNOWN;
1952 }
1953
1954 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1955 }
1956
1957 /* Create an ARM elf linker hash table. */
1958
1959 static struct bfd_link_hash_table *
1960 elf32_arm_link_hash_table_create (bfd *abfd)
1961 {
1962 struct elf32_arm_link_hash_table *ret;
1963 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1964
1965 ret = bfd_malloc (amt);
1966 if (ret == NULL)
1967 return NULL;
1968
1969 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1970 elf32_arm_link_hash_newfunc))
1971 {
1972 free (ret);
1973 return NULL;
1974 }
1975
1976 ret->sgot = NULL;
1977 ret->sgotplt = NULL;
1978 ret->srelgot = NULL;
1979 ret->splt = NULL;
1980 ret->srelplt = NULL;
1981 ret->sdynbss = NULL;
1982 ret->srelbss = NULL;
1983 ret->srelplt2 = NULL;
1984 ret->thumb_glue_size = 0;
1985 ret->arm_glue_size = 0;
1986 ret->bfd_of_glue_owner = NULL;
1987 ret->byteswap_code = 0;
1988 ret->target1_is_rel = 0;
1989 ret->target2_reloc = R_ARM_NONE;
1990 #ifdef FOUR_WORD_PLT
1991 ret->plt_header_size = 16;
1992 ret->plt_entry_size = 16;
1993 #else
1994 ret->plt_header_size = 20;
1995 ret->plt_entry_size = 12;
1996 #endif
1997 ret->fix_v4bx = 0;
1998 ret->use_blx = 0;
1999 ret->vxworks_p = 0;
2000 ret->symbian_p = 0;
2001 ret->use_rel = 1;
2002 ret->sym_sec.abfd = NULL;
2003 ret->obfd = abfd;
2004 ret->tls_ldm_got.refcount = 0;
2005
2006 return &ret->root.root;
2007 }
2008
2009 /* Locate the Thumb encoded calling stub for NAME. */
2010
2011 static struct elf_link_hash_entry *
2012 find_thumb_glue (struct bfd_link_info *link_info,
2013 const char *name,
2014 bfd *input_bfd)
2015 {
2016 char *tmp_name;
2017 struct elf_link_hash_entry *hash;
2018 struct elf32_arm_link_hash_table *hash_table;
2019
2020 /* We need a pointer to the armelf specific hash table. */
2021 hash_table = elf32_arm_hash_table (link_info);
2022
2023 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2024 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2025
2026 BFD_ASSERT (tmp_name);
2027
2028 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2029
2030 hash = elf_link_hash_lookup
2031 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2032
2033 if (hash == NULL)
2034 /* xgettext:c-format */
2035 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
2036 input_bfd, tmp_name, name);
2037
2038 free (tmp_name);
2039
2040 return hash;
2041 }
2042
2043 /* Locate the ARM encoded calling stub for NAME. */
2044
2045 static struct elf_link_hash_entry *
2046 find_arm_glue (struct bfd_link_info *link_info,
2047 const char *name,
2048 bfd *input_bfd)
2049 {
2050 char *tmp_name;
2051 struct elf_link_hash_entry *myh;
2052 struct elf32_arm_link_hash_table *hash_table;
2053
2054 /* We need a pointer to the elfarm specific hash table. */
2055 hash_table = elf32_arm_hash_table (link_info);
2056
2057 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2058 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2059
2060 BFD_ASSERT (tmp_name);
2061
2062 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2063
2064 myh = elf_link_hash_lookup
2065 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2066
2067 if (myh == NULL)
2068 /* xgettext:c-format */
2069 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
2070 input_bfd, tmp_name, name);
2071
2072 free (tmp_name);
2073
2074 return myh;
2075 }
2076
2077 /* ARM->Thumb glue (static images):
2078
2079 .arm
2080 __func_from_arm:
2081 ldr r12, __func_addr
2082 bx r12
2083 __func_addr:
2084 .word func @ behave as if you saw a ARM_32 reloc.
2085
2086 (relocatable images)
2087 .arm
2088 __func_from_arm:
2089 ldr r12, __func_offset
2090 add r12, r12, pc
2091 bx r12
2092 __func_offset:
2093 .word func - .
2094 */
2095
2096 #define ARM2THUMB_STATIC_GLUE_SIZE 12
2097 static const insn32 a2t1_ldr_insn = 0xe59fc000;
2098 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
2099 static const insn32 a2t3_func_addr_insn = 0x00000001;
2100
2101 #define ARM2THUMB_PIC_GLUE_SIZE 16
2102 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
2103 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
2104 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
2105
2106 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
2107
2108 .thumb .thumb
2109 .align 2 .align 2
2110 __func_from_thumb: __func_from_thumb:
2111 bx pc push {r6, lr}
2112 nop ldr r6, __func_addr
2113 .arm mov lr, pc
2114 __func_change_to_arm: bx r6
2115 b func .arm
2116 __func_back_to_thumb:
2117 ldmia r13! {r6, lr}
2118 bx lr
2119 __func_addr:
2120 .word func */
2121
2122 #define THUMB2ARM_GLUE_SIZE 8
2123 static const insn16 t2a1_bx_pc_insn = 0x4778;
2124 static const insn16 t2a2_noop_insn = 0x46c0;
2125 static const insn32 t2a3_b_insn = 0xea000000;
2126
2127 #ifndef ELFARM_NABI_C_INCLUDED
2128 bfd_boolean
2129 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
2130 {
2131 asection * s;
2132 bfd_byte * foo;
2133 struct elf32_arm_link_hash_table * globals;
2134
2135 globals = elf32_arm_hash_table (info);
2136
2137 BFD_ASSERT (globals != NULL);
2138
2139 if (globals->arm_glue_size != 0)
2140 {
2141 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2142
2143 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2144 ARM2THUMB_GLUE_SECTION_NAME);
2145
2146 BFD_ASSERT (s != NULL);
2147
2148 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
2149
2150 s->size = globals->arm_glue_size;
2151 s->contents = foo;
2152 }
2153
2154 if (globals->thumb_glue_size != 0)
2155 {
2156 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2157
2158 s = bfd_get_section_by_name
2159 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2160
2161 BFD_ASSERT (s != NULL);
2162
2163 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
2164
2165 s->size = globals->thumb_glue_size;
2166 s->contents = foo;
2167 }
2168
2169 return TRUE;
2170 }
2171
2172 static void
2173 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
2174 struct elf_link_hash_entry * h)
2175 {
2176 const char * name = h->root.root.string;
2177 asection * s;
2178 char * tmp_name;
2179 struct elf_link_hash_entry * myh;
2180 struct bfd_link_hash_entry * bh;
2181 struct elf32_arm_link_hash_table * globals;
2182 bfd_vma val;
2183
2184 globals = elf32_arm_hash_table (link_info);
2185
2186 BFD_ASSERT (globals != NULL);
2187 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2188
2189 s = bfd_get_section_by_name
2190 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
2191
2192 BFD_ASSERT (s != NULL);
2193
2194 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2195
2196 BFD_ASSERT (tmp_name);
2197
2198 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2199
2200 myh = elf_link_hash_lookup
2201 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
2202
2203 if (myh != NULL)
2204 {
2205 /* We've already seen this guy. */
2206 free (tmp_name);
2207 return;
2208 }
2209
2210 /* The only trick here is using hash_table->arm_glue_size as the value.
2211 Even though the section isn't allocated yet, this is where we will be
2212 putting it. */
2213 bh = NULL;
2214 val = globals->arm_glue_size + 1;
2215 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2216 tmp_name, BSF_GLOBAL, s, val,
2217 NULL, TRUE, FALSE, &bh);
2218
2219 myh = (struct elf_link_hash_entry *) bh;
2220 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2221 myh->forced_local = 1;
2222
2223 free (tmp_name);
2224
2225 if ((link_info->shared || globals->root.is_relocatable_executable))
2226 globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE;
2227 else
2228 globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE;
2229
2230 return;
2231 }
2232
2233 static void
2234 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2235 struct elf_link_hash_entry *h)
2236 {
2237 const char *name = h->root.root.string;
2238 asection *s;
2239 char *tmp_name;
2240 struct elf_link_hash_entry *myh;
2241 struct bfd_link_hash_entry *bh;
2242 struct elf32_arm_link_hash_table *hash_table;
2243 bfd_vma val;
2244
2245 hash_table = elf32_arm_hash_table (link_info);
2246
2247 BFD_ASSERT (hash_table != NULL);
2248 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2249
2250 s = bfd_get_section_by_name
2251 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2252
2253 BFD_ASSERT (s != NULL);
2254
2255 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2256 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2257
2258 BFD_ASSERT (tmp_name);
2259
2260 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2261
2262 myh = elf_link_hash_lookup
2263 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2264
2265 if (myh != NULL)
2266 {
2267 /* We've already seen this guy. */
2268 free (tmp_name);
2269 return;
2270 }
2271
2272 bh = NULL;
2273 val = hash_table->thumb_glue_size + 1;
2274 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2275 tmp_name, BSF_GLOBAL, s, val,
2276 NULL, TRUE, FALSE, &bh);
2277
2278 /* If we mark it 'Thumb', the disassembler will do a better job. */
2279 myh = (struct elf_link_hash_entry *) bh;
2280 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2281 myh->forced_local = 1;
2282
2283 free (tmp_name);
2284
2285 #define CHANGE_TO_ARM "__%s_change_to_arm"
2286 #define BACK_FROM_ARM "__%s_back_from_arm"
2287
2288 /* Allocate another symbol to mark where we switch to Arm mode. */
2289 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2290 + strlen (CHANGE_TO_ARM) + 1);
2291
2292 BFD_ASSERT (tmp_name);
2293
2294 sprintf (tmp_name, CHANGE_TO_ARM, name);
2295
2296 bh = NULL;
2297 val = hash_table->thumb_glue_size + 4,
2298 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2299 tmp_name, BSF_LOCAL, s, val,
2300 NULL, TRUE, FALSE, &bh);
2301
2302 free (tmp_name);
2303
2304 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2305
2306 return;
2307 }
2308
2309 /* Add the glue sections to ABFD. This function is called from the
2310 linker scripts in ld/emultempl/{armelf}.em. */
2311
2312 bfd_boolean
2313 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
2314 struct bfd_link_info *info)
2315 {
2316 flagword flags;
2317 asection *sec;
2318
2319 /* If we are only performing a partial
2320 link do not bother adding the glue. */
2321 if (info->relocatable)
2322 return TRUE;
2323
2324 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
2325
2326 if (sec == NULL)
2327 {
2328 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
2329 will prevent elf_link_input_bfd() from processing the contents
2330 of this section. */
2331 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
2332
2333 sec = bfd_make_section_with_flags (abfd,
2334 ARM2THUMB_GLUE_SECTION_NAME,
2335 flags);
2336
2337 if (sec == NULL
2338 || !bfd_set_section_alignment (abfd, sec, 2))
2339 return FALSE;
2340
2341 /* Set the gc mark to prevent the section from being removed by garbage
2342 collection, despite the fact that no relocs refer to this section. */
2343 sec->gc_mark = 1;
2344 }
2345
2346 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
2347
2348 if (sec == NULL)
2349 {
2350 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2351 | SEC_CODE | SEC_READONLY;
2352
2353 sec = bfd_make_section_with_flags (abfd,
2354 THUMB2ARM_GLUE_SECTION_NAME,
2355 flags);
2356
2357 if (sec == NULL
2358 || !bfd_set_section_alignment (abfd, sec, 2))
2359 return FALSE;
2360
2361 sec->gc_mark = 1;
2362 }
2363
2364 return TRUE;
2365 }
2366
2367 /* Select a BFD to be used to hold the sections used by the glue code.
2368 This function is called from the linker scripts in ld/emultempl/
2369 {armelf/pe}.em */
2370
2371 bfd_boolean
2372 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
2373 {
2374 struct elf32_arm_link_hash_table *globals;
2375
2376 /* If we are only performing a partial link
2377 do not bother getting a bfd to hold the glue. */
2378 if (info->relocatable)
2379 return TRUE;
2380
2381 /* Make sure we don't attach the glue sections to a dynamic object. */
2382 BFD_ASSERT (!(abfd->flags & DYNAMIC));
2383
2384 globals = elf32_arm_hash_table (info);
2385
2386 BFD_ASSERT (globals != NULL);
2387
2388 if (globals->bfd_of_glue_owner != NULL)
2389 return TRUE;
2390
2391 /* Save the bfd for later use. */
2392 globals->bfd_of_glue_owner = abfd;
2393
2394 return TRUE;
2395 }
2396
2397 static void check_use_blx(struct elf32_arm_link_hash_table *globals)
2398 {
2399 if (elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch) > 2)
2400 globals->use_blx = 1;
2401 }
2402
2403 bfd_boolean
2404 bfd_elf32_arm_process_before_allocation (bfd *abfd,
2405 struct bfd_link_info *link_info,
2406 int byteswap_code)
2407 {
2408 Elf_Internal_Shdr *symtab_hdr;
2409 Elf_Internal_Rela *internal_relocs = NULL;
2410 Elf_Internal_Rela *irel, *irelend;
2411 bfd_byte *contents = NULL;
2412
2413 asection *sec;
2414 struct elf32_arm_link_hash_table *globals;
2415
2416 /* If we are only performing a partial link do not bother
2417 to construct any glue. */
2418 if (link_info->relocatable)
2419 return TRUE;
2420
2421 /* Here we have a bfd that is to be included on the link. We have a hook
2422 to do reloc rummaging, before section sizes are nailed down. */
2423 globals = elf32_arm_hash_table (link_info);
2424 check_use_blx (globals);
2425
2426 BFD_ASSERT (globals != NULL);
2427 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2428
2429 if (byteswap_code && !bfd_big_endian (abfd))
2430 {
2431 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
2432 abfd);
2433 return FALSE;
2434 }
2435 globals->byteswap_code = byteswap_code;
2436
2437 /* Rummage around all the relocs and map the glue vectors. */
2438 sec = abfd->sections;
2439
2440 if (sec == NULL)
2441 return TRUE;
2442
2443 for (; sec != NULL; sec = sec->next)
2444 {
2445 if (sec->reloc_count == 0)
2446 continue;
2447
2448 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2449
2450 /* Load the relocs. */
2451 internal_relocs
2452 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
2453 (Elf_Internal_Rela *) NULL, FALSE);
2454
2455 if (internal_relocs == NULL)
2456 goto error_return;
2457
2458 irelend = internal_relocs + sec->reloc_count;
2459 for (irel = internal_relocs; irel < irelend; irel++)
2460 {
2461 long r_type;
2462 unsigned long r_index;
2463
2464 struct elf_link_hash_entry *h;
2465
2466 r_type = ELF32_R_TYPE (irel->r_info);
2467 r_index = ELF32_R_SYM (irel->r_info);
2468
2469 /* These are the only relocation types we care about. */
2470 if ( r_type != R_ARM_PC24
2471 && r_type != R_ARM_PLT32
2472 && r_type != R_ARM_CALL
2473 && r_type != R_ARM_JUMP24
2474 && r_type != R_ARM_THM_CALL)
2475 continue;
2476
2477 /* Get the section contents if we haven't done so already. */
2478 if (contents == NULL)
2479 {
2480 /* Get cached copy if it exists. */
2481 if (elf_section_data (sec)->this_hdr.contents != NULL)
2482 contents = elf_section_data (sec)->this_hdr.contents;
2483 else
2484 {
2485 /* Go get them off disk. */
2486 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2487 goto error_return;
2488 }
2489 }
2490
2491 /* If the relocation is not against a symbol it cannot concern us. */
2492 h = NULL;
2493
2494 /* We don't care about local symbols. */
2495 if (r_index < symtab_hdr->sh_info)
2496 continue;
2497
2498 /* This is an external symbol. */
2499 r_index -= symtab_hdr->sh_info;
2500 h = (struct elf_link_hash_entry *)
2501 elf_sym_hashes (abfd)[r_index];
2502
2503 /* If the relocation is against a static symbol it must be within
2504 the current section and so cannot be a cross ARM/Thumb relocation. */
2505 if (h == NULL)
2506 continue;
2507
2508 /* If the call will go through a PLT entry then we do not need
2509 glue. */
2510 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
2511 continue;
2512
2513 switch (r_type)
2514 {
2515 case R_ARM_PC24:
2516 case R_ARM_PLT32:
2517 case R_ARM_CALL:
2518 case R_ARM_JUMP24:
2519 /* This one is a call from arm code. We need to look up
2520 the target of the call. If it is a thumb target, we
2521 insert glue. */
2522 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
2523 && !(r_type == R_ARM_CALL && globals->use_blx))
2524 record_arm_to_thumb_glue (link_info, h);
2525 break;
2526
2527 case R_ARM_THM_CALL:
2528 /* This one is a call from thumb code. We look
2529 up the target of the call. If it is not a thumb
2530 target, we insert glue. */
2531 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC && !globals->use_blx)
2532 record_thumb_to_arm_glue (link_info, h);
2533 break;
2534
2535 default:
2536 abort ();
2537 }
2538 }
2539
2540 if (contents != NULL
2541 && elf_section_data (sec)->this_hdr.contents != contents)
2542 free (contents);
2543 contents = NULL;
2544
2545 if (internal_relocs != NULL
2546 && elf_section_data (sec)->relocs != internal_relocs)
2547 free (internal_relocs);
2548 internal_relocs = NULL;
2549 }
2550
2551 return TRUE;
2552
2553 error_return:
2554 if (contents != NULL
2555 && elf_section_data (sec)->this_hdr.contents != contents)
2556 free (contents);
2557 if (internal_relocs != NULL
2558 && elf_section_data (sec)->relocs != internal_relocs)
2559 free (internal_relocs);
2560
2561 return FALSE;
2562 }
2563 #endif
2564
2565
2566 /* Set target relocation values needed during linking. */
2567
2568 void
2569 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
2570 int target1_is_rel,
2571 char * target2_type,
2572 int fix_v4bx,
2573 int use_blx)
2574 {
2575 struct elf32_arm_link_hash_table *globals;
2576
2577 globals = elf32_arm_hash_table (link_info);
2578
2579 globals->target1_is_rel = target1_is_rel;
2580 if (strcmp (target2_type, "rel") == 0)
2581 globals->target2_reloc = R_ARM_REL32;
2582 else if (strcmp (target2_type, "abs") == 0)
2583 globals->target2_reloc = R_ARM_ABS32;
2584 else if (strcmp (target2_type, "got-rel") == 0)
2585 globals->target2_reloc = R_ARM_GOT_PREL;
2586 else
2587 {
2588 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
2589 target2_type);
2590 }
2591 globals->fix_v4bx = fix_v4bx;
2592 globals->use_blx |= use_blx;
2593 }
2594
2595 /* The thumb form of a long branch is a bit finicky, because the offset
2596 encoding is split over two fields, each in it's own instruction. They
2597 can occur in any order. So given a thumb form of long branch, and an
2598 offset, insert the offset into the thumb branch and return finished
2599 instruction.
2600
2601 It takes two thumb instructions to encode the target address. Each has
2602 11 bits to invest. The upper 11 bits are stored in one (identified by
2603 H-0.. see below), the lower 11 bits are stored in the other (identified
2604 by H-1).
2605
2606 Combine together and shifted left by 1 (it's a half word address) and
2607 there you have it.
2608
2609 Op: 1111 = F,
2610 H-0, upper address-0 = 000
2611 Op: 1111 = F,
2612 H-1, lower address-0 = 800
2613
2614 They can be ordered either way, but the arm tools I've seen always put
2615 the lower one first. It probably doesn't matter. krk@cygnus.com
2616
2617 XXX: Actually the order does matter. The second instruction (H-1)
2618 moves the computed address into the PC, so it must be the second one
2619 in the sequence. The problem, however is that whilst little endian code
2620 stores the instructions in HI then LOW order, big endian code does the
2621 reverse. nickc@cygnus.com. */
2622
2623 #define LOW_HI_ORDER 0xF800F000
2624 #define HI_LOW_ORDER 0xF000F800
2625
2626 static insn32
2627 insert_thumb_branch (insn32 br_insn, int rel_off)
2628 {
2629 unsigned int low_bits;
2630 unsigned int high_bits;
2631
2632 BFD_ASSERT ((rel_off & 1) != 1);
2633
2634 rel_off >>= 1; /* Half word aligned address. */
2635 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2636 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
2637
2638 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2639 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2640 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2641 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2642 else
2643 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2644 abort (); /* Error - not a valid branch instruction form. */
2645
2646 return br_insn;
2647 }
2648
2649 /* Thumb code calling an ARM function. */
2650
2651 static int
2652 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2653 const char * name,
2654 bfd * input_bfd,
2655 bfd * output_bfd,
2656 asection * input_section,
2657 bfd_byte * hit_data,
2658 asection * sym_sec,
2659 bfd_vma offset,
2660 bfd_signed_vma addend,
2661 bfd_vma val)
2662 {
2663 asection * s = 0;
2664 bfd_vma my_offset;
2665 unsigned long int tmp;
2666 long int ret_offset;
2667 struct elf_link_hash_entry * myh;
2668 struct elf32_arm_link_hash_table * globals;
2669
2670 myh = find_thumb_glue (info, name, input_bfd);
2671 if (myh == NULL)
2672 return FALSE;
2673
2674 globals = elf32_arm_hash_table (info);
2675
2676 BFD_ASSERT (globals != NULL);
2677 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2678
2679 my_offset = myh->root.u.def.value;
2680
2681 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2682 THUMB2ARM_GLUE_SECTION_NAME);
2683
2684 BFD_ASSERT (s != NULL);
2685 BFD_ASSERT (s->contents != NULL);
2686 BFD_ASSERT (s->output_section != NULL);
2687
2688 if ((my_offset & 0x01) == 0x01)
2689 {
2690 if (sym_sec != NULL
2691 && sym_sec->owner != NULL
2692 && !INTERWORK_FLAG (sym_sec->owner))
2693 {
2694 (*_bfd_error_handler)
2695 (_("%B(%s): warning: interworking not enabled.\n"
2696 " first occurrence: %B: thumb call to arm"),
2697 sym_sec->owner, input_bfd, name);
2698
2699 return FALSE;
2700 }
2701
2702 --my_offset;
2703 myh->root.u.def.value = my_offset;
2704
2705 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2706 s->contents + my_offset);
2707
2708 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2709 s->contents + my_offset + 2);
2710
2711 ret_offset =
2712 /* Address of destination of the stub. */
2713 ((bfd_signed_vma) val)
2714 - ((bfd_signed_vma)
2715 /* Offset from the start of the current section
2716 to the start of the stubs. */
2717 (s->output_offset
2718 /* Offset of the start of this stub from the start of the stubs. */
2719 + my_offset
2720 /* Address of the start of the current section. */
2721 + s->output_section->vma)
2722 /* The branch instruction is 4 bytes into the stub. */
2723 + 4
2724 /* ARM branches work from the pc of the instruction + 8. */
2725 + 8);
2726
2727 bfd_put_32 (output_bfd,
2728 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2729 s->contents + my_offset + 4);
2730 }
2731
2732 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2733
2734 /* Now go back and fix up the original BL insn to point to here. */
2735 ret_offset =
2736 /* Address of where the stub is located. */
2737 (s->output_section->vma + s->output_offset + my_offset)
2738 /* Address of where the BL is located. */
2739 - (input_section->output_section->vma + input_section->output_offset
2740 + offset)
2741 /* Addend in the relocation. */
2742 - addend
2743 /* Biassing for PC-relative addressing. */
2744 - 8;
2745
2746 tmp = bfd_get_32 (input_bfd, hit_data
2747 - input_section->vma);
2748
2749 bfd_put_32 (output_bfd,
2750 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2751 hit_data - input_section->vma);
2752
2753 return TRUE;
2754 }
2755
2756 /* Arm code calling a Thumb function. */
2757
2758 static int
2759 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2760 const char * name,
2761 bfd * input_bfd,
2762 bfd * output_bfd,
2763 asection * input_section,
2764 bfd_byte * hit_data,
2765 asection * sym_sec,
2766 bfd_vma offset,
2767 bfd_signed_vma addend,
2768 bfd_vma val)
2769 {
2770 unsigned long int tmp;
2771 bfd_vma my_offset;
2772 asection * s;
2773 long int ret_offset;
2774 struct elf_link_hash_entry * myh;
2775 struct elf32_arm_link_hash_table * globals;
2776
2777 myh = find_arm_glue (info, name, input_bfd);
2778 if (myh == NULL)
2779 return FALSE;
2780
2781 globals = elf32_arm_hash_table (info);
2782
2783 BFD_ASSERT (globals != NULL);
2784 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2785
2786 my_offset = myh->root.u.def.value;
2787 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2788 ARM2THUMB_GLUE_SECTION_NAME);
2789 BFD_ASSERT (s != NULL);
2790 BFD_ASSERT (s->contents != NULL);
2791 BFD_ASSERT (s->output_section != NULL);
2792
2793 if ((my_offset & 0x01) == 0x01)
2794 {
2795 if (sym_sec != NULL
2796 && sym_sec->owner != NULL
2797 && !INTERWORK_FLAG (sym_sec->owner))
2798 {
2799 (*_bfd_error_handler)
2800 (_("%B(%s): warning: interworking not enabled.\n"
2801 " first occurrence: %B: arm call to thumb"),
2802 sym_sec->owner, input_bfd, name);
2803 }
2804
2805 --my_offset;
2806 myh->root.u.def.value = my_offset;
2807
2808 if ((info->shared || globals->root.is_relocatable_executable))
2809 {
2810 /* For relocatable objects we can't use absolute addresses,
2811 so construct the address from a relative offset. */
2812 /* TODO: If the offset is small it's probably worth
2813 constructing the address with adds. */
2814 bfd_put_32 (output_bfd, (bfd_vma) a2t1p_ldr_insn,
2815 s->contents + my_offset);
2816 bfd_put_32 (output_bfd, (bfd_vma) a2t2p_add_pc_insn,
2817 s->contents + my_offset + 4);
2818 bfd_put_32 (output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
2819 s->contents + my_offset + 8);
2820 /* Adjust the offset by 4 for the position of the add,
2821 and 8 for the pipeline offset. */
2822 ret_offset = (val - (s->output_offset
2823 + s->output_section->vma
2824 + my_offset + 12))
2825 | 1;
2826 bfd_put_32 (output_bfd, ret_offset,
2827 s->contents + my_offset + 12);
2828 }
2829 else
2830 {
2831 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2832 s->contents + my_offset);
2833
2834 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2835 s->contents + my_offset + 4);
2836
2837 /* It's a thumb address. Add the low order bit. */
2838 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2839 s->contents + my_offset + 8);
2840 }
2841 }
2842
2843 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2844
2845 tmp = bfd_get_32 (input_bfd, hit_data);
2846 tmp = tmp & 0xFF000000;
2847
2848 /* Somehow these are both 4 too far, so subtract 8. */
2849 ret_offset = (s->output_offset
2850 + my_offset
2851 + s->output_section->vma
2852 - (input_section->output_offset
2853 + input_section->output_section->vma
2854 + offset + addend)
2855 - 8);
2856
2857 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2858
2859 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2860
2861 return TRUE;
2862 }
2863
2864 /* Some relocations map to different relocations depending on the
2865 target. Return the real relocation. */
2866 static int
2867 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2868 int r_type)
2869 {
2870 switch (r_type)
2871 {
2872 case R_ARM_TARGET1:
2873 if (globals->target1_is_rel)
2874 return R_ARM_REL32;
2875 else
2876 return R_ARM_ABS32;
2877
2878 case R_ARM_TARGET2:
2879 return globals->target2_reloc;
2880
2881 default:
2882 return r_type;
2883 }
2884 }
2885
2886 /* Return the base VMA address which should be subtracted from real addresses
2887 when resolving @dtpoff relocation.
2888 This is PT_TLS segment p_vaddr. */
2889
2890 static bfd_vma
2891 dtpoff_base (struct bfd_link_info *info)
2892 {
2893 /* If tls_sec is NULL, we should have signalled an error already. */
2894 if (elf_hash_table (info)->tls_sec == NULL)
2895 return 0;
2896 return elf_hash_table (info)->tls_sec->vma;
2897 }
2898
2899 /* Return the relocation value for @tpoff relocation
2900 if STT_TLS virtual address is ADDRESS. */
2901
2902 static bfd_vma
2903 tpoff (struct bfd_link_info *info, bfd_vma address)
2904 {
2905 struct elf_link_hash_table *htab = elf_hash_table (info);
2906 bfd_vma base;
2907
2908 /* If tls_sec is NULL, we should have signalled an error already. */
2909 if (htab->tls_sec == NULL)
2910 return 0;
2911 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
2912 return address - htab->tls_sec->vma + base;
2913 }
2914
2915 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
2916 VALUE is the relocation value. */
2917
2918 static bfd_reloc_status_type
2919 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
2920 {
2921 if (value > 0xfff)
2922 return bfd_reloc_overflow;
2923
2924 value |= bfd_get_32 (abfd, data) & 0xfffff000;
2925 bfd_put_32 (abfd, value, data);
2926 return bfd_reloc_ok;
2927 }
2928
2929 /* Perform a relocation as part of a final link. */
2930
2931 static bfd_reloc_status_type
2932 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2933 bfd * input_bfd,
2934 bfd * output_bfd,
2935 asection * input_section,
2936 bfd_byte * contents,
2937 Elf_Internal_Rela * rel,
2938 bfd_vma value,
2939 struct bfd_link_info * info,
2940 asection * sym_sec,
2941 const char * sym_name,
2942 int sym_flags,
2943 struct elf_link_hash_entry * h,
2944 bfd_boolean * unresolved_reloc_p)
2945 {
2946 unsigned long r_type = howto->type;
2947 unsigned long r_symndx;
2948 bfd_byte * hit_data = contents + rel->r_offset;
2949 bfd * dynobj = NULL;
2950 Elf_Internal_Shdr * symtab_hdr;
2951 struct elf_link_hash_entry ** sym_hashes;
2952 bfd_vma * local_got_offsets;
2953 asection * sgot = NULL;
2954 asection * splt = NULL;
2955 asection * sreloc = NULL;
2956 bfd_vma addend;
2957 bfd_signed_vma signed_addend;
2958 struct elf32_arm_link_hash_table * globals;
2959
2960 globals = elf32_arm_hash_table (info);
2961
2962 /* Some relocation type map to different relocations depending on the
2963 target. We pick the right one here. */
2964 r_type = arm_real_reloc_type (globals, r_type);
2965 if (r_type != howto->type)
2966 howto = elf32_arm_howto_from_type (r_type);
2967
2968 /* If the start address has been set, then set the EF_ARM_HASENTRY
2969 flag. Setting this more than once is redundant, but the cost is
2970 not too high, and it keeps the code simple.
2971
2972 The test is done here, rather than somewhere else, because the
2973 start address is only set just before the final link commences.
2974
2975 Note - if the user deliberately sets a start address of 0, the
2976 flag will not be set. */
2977 if (bfd_get_start_address (output_bfd) != 0)
2978 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2979
2980 dynobj = elf_hash_table (info)->dynobj;
2981 if (dynobj)
2982 {
2983 sgot = bfd_get_section_by_name (dynobj, ".got");
2984 splt = bfd_get_section_by_name (dynobj, ".plt");
2985 }
2986 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2987 sym_hashes = elf_sym_hashes (input_bfd);
2988 local_got_offsets = elf_local_got_offsets (input_bfd);
2989 r_symndx = ELF32_R_SYM (rel->r_info);
2990
2991 if (globals->use_rel)
2992 {
2993 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2994
2995 if (addend & ((howto->src_mask + 1) >> 1))
2996 {
2997 signed_addend = -1;
2998 signed_addend &= ~ howto->src_mask;
2999 signed_addend |= addend;
3000 }
3001 else
3002 signed_addend = addend;
3003 }
3004 else
3005 addend = signed_addend = rel->r_addend;
3006
3007 switch (r_type)
3008 {
3009 case R_ARM_NONE:
3010 /* We don't need to find a value for this symbol. It's just a
3011 marker. */
3012 *unresolved_reloc_p = FALSE;
3013 return bfd_reloc_ok;
3014
3015 case R_ARM_ABS12:
3016 if (!globals->vxworks_p)
3017 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
3018
3019 case R_ARM_PC24:
3020 case R_ARM_ABS32:
3021 case R_ARM_REL32:
3022 case R_ARM_CALL:
3023 case R_ARM_JUMP24:
3024 case R_ARM_XPC25:
3025 case R_ARM_PREL31:
3026 case R_ARM_PLT32:
3027 /* r_symndx will be zero only for relocs against symbols
3028 from removed linkonce sections, or sections discarded by
3029 a linker script. */
3030 if (r_symndx == 0)
3031 return bfd_reloc_ok;
3032
3033 /* Handle relocations which should use the PLT entry. ABS32/REL32
3034 will use the symbol's value, which may point to a PLT entry, but we
3035 don't need to handle that here. If we created a PLT entry, all
3036 branches in this object should go to it. */
3037 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
3038 && h != NULL
3039 && splt != NULL
3040 && h->plt.offset != (bfd_vma) -1)
3041 {
3042 /* If we've created a .plt section, and assigned a PLT entry to
3043 this function, it should not be known to bind locally. If
3044 it were, we would have cleared the PLT entry. */
3045 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
3046
3047 value = (splt->output_section->vma
3048 + splt->output_offset
3049 + h->plt.offset);
3050 *unresolved_reloc_p = FALSE;
3051 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3052 contents, rel->r_offset, value,
3053 rel->r_addend);
3054 }
3055
3056 /* When generating a shared object or relocatable executable, these
3057 relocations are copied into the output file to be resolved at
3058 run time. */
3059 if ((info->shared || globals->root.is_relocatable_executable)
3060 && (input_section->flags & SEC_ALLOC)
3061 && (r_type != R_ARM_REL32
3062 || !SYMBOL_CALLS_LOCAL (info, h))
3063 && (h == NULL
3064 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3065 || h->root.type != bfd_link_hash_undefweak)
3066 && r_type != R_ARM_PC24
3067 && r_type != R_ARM_CALL
3068 && r_type != R_ARM_JUMP24
3069 && r_type != R_ARM_PREL31
3070 && r_type != R_ARM_PLT32)
3071 {
3072 Elf_Internal_Rela outrel;
3073 bfd_byte *loc;
3074 bfd_boolean skip, relocate;
3075
3076 *unresolved_reloc_p = FALSE;
3077
3078 if (sreloc == NULL)
3079 {
3080 const char * name;
3081
3082 name = (bfd_elf_string_from_elf_section
3083 (input_bfd,
3084 elf_elfheader (input_bfd)->e_shstrndx,
3085 elf_section_data (input_section)->rel_hdr.sh_name));
3086 if (name == NULL)
3087 return bfd_reloc_notsupported;
3088
3089 BFD_ASSERT (reloc_section_p (globals, name, input_section));
3090
3091 sreloc = bfd_get_section_by_name (dynobj, name);
3092 BFD_ASSERT (sreloc != NULL);
3093 }
3094
3095 skip = FALSE;
3096 relocate = FALSE;
3097
3098 outrel.r_addend = addend;
3099 outrel.r_offset =
3100 _bfd_elf_section_offset (output_bfd, info, input_section,
3101 rel->r_offset);
3102 if (outrel.r_offset == (bfd_vma) -1)
3103 skip = TRUE;
3104 else if (outrel.r_offset == (bfd_vma) -2)
3105 skip = TRUE, relocate = TRUE;
3106 outrel.r_offset += (input_section->output_section->vma
3107 + input_section->output_offset);
3108
3109 if (skip)
3110 memset (&outrel, 0, sizeof outrel);
3111 else if (h != NULL
3112 && h->dynindx != -1
3113 && (!info->shared
3114 || !info->symbolic
3115 || !h->def_regular))
3116 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3117 else
3118 {
3119 int symbol;
3120
3121 /* This symbol is local, or marked to become local. */
3122 if (sym_flags == STT_ARM_TFUNC)
3123 value |= 1;
3124 if (globals->symbian_p)
3125 {
3126 /* On Symbian OS, the data segment and text segement
3127 can be relocated independently. Therefore, we
3128 must indicate the segment to which this
3129 relocation is relative. The BPABI allows us to
3130 use any symbol in the right segment; we just use
3131 the section symbol as it is convenient. (We
3132 cannot use the symbol given by "h" directly as it
3133 will not appear in the dynamic symbol table.) */
3134 if (sym_sec)
3135 symbol = elf_section_data (sym_sec->output_section)->dynindx;
3136 else
3137 symbol = elf_section_data (input_section->output_section)->dynindx;
3138 BFD_ASSERT (symbol != 0);
3139 }
3140 else
3141 /* On SVR4-ish systems, the dynamic loader cannot
3142 relocate the text and data segments independently,
3143 so the symbol does not matter. */
3144 symbol = 0;
3145 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
3146 if (globals->use_rel)
3147 relocate = TRUE;
3148 else
3149 outrel.r_addend += value;
3150 }
3151
3152 loc = sreloc->contents;
3153 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
3154 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3155
3156 /* If this reloc is against an external symbol, we do not want to
3157 fiddle with the addend. Otherwise, we need to include the symbol
3158 value so that it becomes an addend for the dynamic reloc. */
3159 if (! relocate)
3160 return bfd_reloc_ok;
3161
3162 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3163 contents, rel->r_offset, value,
3164 (bfd_vma) 0);
3165 }
3166 else switch (r_type)
3167 {
3168 case R_ARM_ABS12:
3169 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
3170
3171 case R_ARM_XPC25: /* Arm BLX instruction. */
3172 case R_ARM_CALL:
3173 case R_ARM_JUMP24:
3174 case R_ARM_PC24: /* Arm B/BL instruction */
3175 case R_ARM_PLT32:
3176 if (r_type == R_ARM_XPC25)
3177 {
3178 /* Check for Arm calling Arm function. */
3179 /* FIXME: Should we translate the instruction into a BL
3180 instruction instead ? */
3181 if (sym_flags != STT_ARM_TFUNC)
3182 (*_bfd_error_handler)
3183 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
3184 input_bfd,
3185 h ? h->root.root.string : "(local)");
3186 }
3187 else if (r_type != R_ARM_CALL || !globals->use_blx)
3188 {
3189 /* Check for Arm calling Thumb function. */
3190 if (sym_flags == STT_ARM_TFUNC)
3191 {
3192 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
3193 output_bfd, input_section,
3194 hit_data, sym_sec, rel->r_offset,
3195 signed_addend, value);
3196 return bfd_reloc_ok;
3197 }
3198 }
3199
3200 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
3201 where:
3202 S is the address of the symbol in the relocation.
3203 P is address of the instruction being relocated.
3204 A is the addend (extracted from the instruction) in bytes.
3205
3206 S is held in 'value'.
3207 P is the base address of the section containing the
3208 instruction plus the offset of the reloc into that
3209 section, ie:
3210 (input_section->output_section->vma +
3211 input_section->output_offset +
3212 rel->r_offset).
3213 A is the addend, converted into bytes, ie:
3214 (signed_addend * 4)
3215
3216 Note: None of these operations have knowledge of the pipeline
3217 size of the processor, thus it is up to the assembler to
3218 encode this information into the addend. */
3219 value -= (input_section->output_section->vma
3220 + input_section->output_offset);
3221 value -= rel->r_offset;
3222 if (globals->use_rel)
3223 value += (signed_addend << howto->size);
3224 else
3225 /* RELA addends do not have to be adjusted by howto->size. */
3226 value += signed_addend;
3227
3228 signed_addend = value;
3229 signed_addend >>= howto->rightshift;
3230
3231 /* It is not an error for an undefined weak reference to be
3232 out of range. Any program that branches to such a symbol
3233 is going to crash anyway, so there is no point worrying
3234 about getting the destination exactly right. */
3235 if (! h || h->root.type != bfd_link_hash_undefweak)
3236 {
3237 /* Perform a signed range check. */
3238 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
3239 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
3240 return bfd_reloc_overflow;
3241 }
3242
3243 addend = (value & 2);
3244
3245 value = (signed_addend & howto->dst_mask)
3246 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
3247
3248 /* Set the H bit in the BLX instruction. */
3249 if (sym_flags == STT_ARM_TFUNC)
3250 {
3251 if (addend)
3252 value |= (1 << 24);
3253 else
3254 value &= ~(bfd_vma)(1 << 24);
3255 }
3256 if (r_type == R_ARM_CALL)
3257 {
3258 /* Select the correct instruction (BL or BLX). */
3259 if (sym_flags == STT_ARM_TFUNC)
3260 value |= (1 << 28);
3261 else
3262 {
3263 value &= ~(bfd_vma)(1 << 28);
3264 value |= (1 << 24);
3265 }
3266 }
3267 break;
3268
3269 case R_ARM_ABS32:
3270 value += addend;
3271 if (sym_flags == STT_ARM_TFUNC)
3272 value |= 1;
3273 break;
3274
3275 case R_ARM_REL32:
3276 value -= (input_section->output_section->vma
3277 + input_section->output_offset + rel->r_offset);
3278 value += addend;
3279 break;
3280
3281 case R_ARM_PREL31:
3282 value -= (input_section->output_section->vma
3283 + input_section->output_offset + rel->r_offset);
3284 value += signed_addend;
3285 if (! h || h->root.type != bfd_link_hash_undefweak)
3286 {
3287 /* Check for overflow */
3288 if ((value ^ (value >> 1)) & (1 << 30))
3289 return bfd_reloc_overflow;
3290 }
3291 value &= 0x7fffffff;
3292 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
3293 if (sym_flags == STT_ARM_TFUNC)
3294 value |= 1;
3295 break;
3296 }
3297
3298 bfd_put_32 (input_bfd, value, hit_data);
3299 return bfd_reloc_ok;
3300
3301 case R_ARM_ABS8:
3302 value += addend;
3303 if ((long) value > 0x7f || (long) value < -0x80)
3304 return bfd_reloc_overflow;
3305
3306 bfd_put_8 (input_bfd, value, hit_data);
3307 return bfd_reloc_ok;
3308
3309 case R_ARM_ABS16:
3310 value += addend;
3311
3312 if ((long) value > 0x7fff || (long) value < -0x8000)
3313 return bfd_reloc_overflow;
3314
3315 bfd_put_16 (input_bfd, value, hit_data);
3316 return bfd_reloc_ok;
3317
3318 case R_ARM_THM_ABS5:
3319 /* Support ldr and str instructions for the thumb. */
3320 if (globals->use_rel)
3321 {
3322 /* Need to refetch addend. */
3323 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3324 /* ??? Need to determine shift amount from operand size. */
3325 addend >>= howto->rightshift;
3326 }
3327 value += addend;
3328
3329 /* ??? Isn't value unsigned? */
3330 if ((long) value > 0x1f || (long) value < -0x10)
3331 return bfd_reloc_overflow;
3332
3333 /* ??? Value needs to be properly shifted into place first. */
3334 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
3335 bfd_put_16 (input_bfd, value, hit_data);
3336 return bfd_reloc_ok;
3337
3338 case R_ARM_THM_XPC22:
3339 case R_ARM_THM_CALL:
3340 /* Thumb BL (branch long instruction). */
3341 {
3342 bfd_vma relocation;
3343 bfd_boolean overflow = FALSE;
3344 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3345 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3346 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3347 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3348 bfd_vma check;
3349 bfd_signed_vma signed_check;
3350
3351 /* Need to refetch the addend and squish the two 11 bit pieces
3352 together. */
3353 if (globals->use_rel)
3354 {
3355 bfd_vma upper = upper_insn & 0x7ff;
3356 bfd_vma lower = lower_insn & 0x7ff;
3357 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
3358 addend = (upper << 12) | (lower << 1);
3359 signed_addend = addend;
3360 }
3361
3362 if (r_type == R_ARM_THM_XPC22)
3363 {
3364 /* Check for Thumb to Thumb call. */
3365 /* FIXME: Should we translate the instruction into a BL
3366 instruction instead ? */
3367 if (sym_flags == STT_ARM_TFUNC)
3368 (*_bfd_error_handler)
3369 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
3370 input_bfd,
3371 h ? h->root.root.string : "(local)");
3372 }
3373 else
3374 {
3375 /* If it is not a call to Thumb, assume call to Arm.
3376 If it is a call relative to a section name, then it is not a
3377 function call at all, but rather a long jump. Calls through
3378 the PLT do not require stubs. */
3379 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
3380 && (h == NULL || splt == NULL
3381 || h->plt.offset == (bfd_vma) -1))
3382 {
3383 if (globals->use_blx)
3384 {
3385 /* Convert BL to BLX. */
3386 lower_insn = (lower_insn & ~0x1000) | 0x0800;
3387 }
3388 else if (elf32_thumb_to_arm_stub
3389 (info, sym_name, input_bfd, output_bfd, input_section,
3390 hit_data, sym_sec, rel->r_offset, signed_addend, value))
3391 return bfd_reloc_ok;
3392 else
3393 return bfd_reloc_dangerous;
3394 }
3395 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx)
3396 {
3397 /* Make sure this is a BL. */
3398 lower_insn |= 0x1800;
3399 }
3400 }
3401
3402 /* Handle calls via the PLT. */
3403 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
3404 {
3405 value = (splt->output_section->vma
3406 + splt->output_offset
3407 + h->plt.offset);
3408 if (globals->use_blx)
3409 {
3410 /* If the Thumb BLX instruction is available, convert the
3411 BL to a BLX instruction to call the ARM-mode PLT entry. */
3412 lower_insn = (lower_insn & ~0x1000) | 0x0800;
3413 }
3414 else
3415 /* Target the Thumb stub before the ARM PLT entry. */
3416 value -= PLT_THUMB_STUB_SIZE;
3417 *unresolved_reloc_p = FALSE;
3418 }
3419
3420 relocation = value + signed_addend;
3421
3422 relocation -= (input_section->output_section->vma
3423 + input_section->output_offset
3424 + rel->r_offset);
3425
3426 check = relocation >> howto->rightshift;
3427
3428 /* If this is a signed value, the rightshift just dropped
3429 leading 1 bits (assuming twos complement). */
3430 if ((bfd_signed_vma) relocation >= 0)
3431 signed_check = check;
3432 else
3433 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3434
3435 /* Assumes two's complement. */
3436 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3437 overflow = TRUE;
3438
3439 if ((lower_insn & 0x1800) == 0x0800)
3440 /* For a BLX instruction, make sure that the relocation is rounded up
3441 to a word boundary. This follows the semantics of the instruction
3442 which specifies that bit 1 of the target address will come from bit
3443 1 of the base address. */
3444 relocation = (relocation + 2) & ~ 3;
3445
3446 /* Put RELOCATION back into the insn. */
3447 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
3448 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
3449
3450 /* Put the relocated value back in the object file: */
3451 bfd_put_16 (input_bfd, upper_insn, hit_data);
3452 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3453
3454 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3455 }
3456 break;
3457
3458 case R_ARM_THM_JUMP24:
3459 /* Thumb32 unconditional branch instruction. */
3460 {
3461 bfd_vma relocation;
3462 bfd_boolean overflow = FALSE;
3463 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3464 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3465 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3466 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3467 bfd_vma check;
3468 bfd_signed_vma signed_check;
3469
3470 /* Need to refetch the addend, reconstruct the top three bits, and glue the
3471 two pieces together. */
3472 if (globals->use_rel)
3473 {
3474 bfd_vma S = (upper_insn & 0x0400) >> 10;
3475 bfd_vma hi = (upper_insn & 0x03ff);
3476 bfd_vma I1 = (lower_insn & 0x2000) >> 13;
3477 bfd_vma I2 = (lower_insn & 0x0800) >> 11;
3478 bfd_vma lo = (lower_insn & 0x07ff);
3479
3480 I1 = !(I1 ^ S);
3481 I2 = !(I2 ^ S);
3482 S = !S;
3483
3484 signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1);
3485 signed_addend -= (1 << 24); /* Sign extend. */
3486 }
3487
3488 /* ??? Should handle interworking? GCC might someday try to
3489 use this for tail calls. */
3490
3491 relocation = value + signed_addend;
3492 relocation -= (input_section->output_section->vma
3493 + input_section->output_offset
3494 + rel->r_offset);
3495
3496 check = relocation >> howto->rightshift;
3497
3498 /* If this is a signed value, the rightshift just dropped
3499 leading 1 bits (assuming twos complement). */
3500 if ((bfd_signed_vma) relocation >= 0)
3501 signed_check = check;
3502 else
3503 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3504
3505 /* Assumes two's complement. */
3506 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3507 overflow = TRUE;
3508
3509 /* Put RELOCATION back into the insn. */
3510 {
3511 bfd_vma S = (relocation & 0x01000000) >> 24;
3512 bfd_vma I1 = (relocation & 0x00800000) >> 23;
3513 bfd_vma I2 = (relocation & 0x00400000) >> 22;
3514 bfd_vma hi = (relocation & 0x003ff000) >> 12;
3515 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
3516
3517 I1 = !(I1 ^ S);
3518 I2 = !(I2 ^ S);
3519
3520 upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi;
3521 lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo;
3522 }
3523
3524 /* Put the relocated value back in the object file: */
3525 bfd_put_16 (input_bfd, upper_insn, hit_data);
3526 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3527
3528 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3529 }
3530
3531 case R_ARM_THM_JUMP19:
3532 /* Thumb32 conditional branch instruction. */
3533 {
3534 bfd_vma relocation;
3535 bfd_boolean overflow = FALSE;
3536 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3537 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3538 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3539 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3540 bfd_vma check;
3541 bfd_signed_vma signed_check;
3542
3543 /* Need to refetch the addend, reconstruct the top three bits,
3544 and squish the two 11 bit pieces together. */
3545 if (globals->use_rel)
3546 {
3547 bfd_vma S = (upper_insn & 0x0400) >> 10;
3548 bfd_vma upper = (upper_insn & 0x001f);
3549 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
3550 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
3551 bfd_vma lower = (lower_insn & 0x07ff);
3552
3553 upper |= J2 << 6;
3554 upper |= J1 << 7;
3555 upper |= ~S << 8;
3556 upper -= 0x0100; /* Sign extend. */
3557
3558 addend = (upper << 12) | (lower << 1);
3559 signed_addend = addend;
3560 }
3561
3562 /* ??? Should handle interworking? GCC might someday try to
3563 use this for tail calls. */
3564
3565 relocation = value + signed_addend;
3566 relocation -= (input_section->output_section->vma
3567 + input_section->output_offset
3568 + rel->r_offset);
3569
3570 check = relocation >> howto->rightshift;
3571
3572 /* If this is a signed value, the rightshift just dropped
3573 leading 1 bits (assuming twos complement). */
3574 if ((bfd_signed_vma) relocation >= 0)
3575 signed_check = check;
3576 else
3577 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3578
3579 /* Assumes two's complement. */
3580 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3581 overflow = TRUE;
3582
3583 /* Put RELOCATION back into the insn. */
3584 {
3585 bfd_vma S = (relocation & 0x00100000) >> 20;
3586 bfd_vma J2 = (relocation & 0x00080000) >> 19;
3587 bfd_vma J1 = (relocation & 0x00040000) >> 18;
3588 bfd_vma hi = (relocation & 0x0003f000) >> 12;
3589 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
3590
3591 upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi;
3592 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
3593 }
3594
3595 /* Put the relocated value back in the object file: */
3596 bfd_put_16 (input_bfd, upper_insn, hit_data);
3597 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3598
3599 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3600 }
3601
3602 case R_ARM_THM_JUMP11:
3603 case R_ARM_THM_JUMP8:
3604 case R_ARM_THM_JUMP6:
3605 /* Thumb B (branch) instruction). */
3606 {
3607 bfd_signed_vma relocation;
3608 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
3609 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3610 bfd_signed_vma signed_check;
3611
3612 /* CZB cannot jump backward. */
3613 if (r_type == R_ARM_THM_JUMP6)
3614 reloc_signed_min = 0;
3615
3616 if (globals->use_rel)
3617 {
3618 /* Need to refetch addend. */
3619 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3620 if (addend & ((howto->src_mask + 1) >> 1))
3621 {
3622 signed_addend = -1;
3623 signed_addend &= ~ howto->src_mask;
3624 signed_addend |= addend;
3625 }
3626 else
3627 signed_addend = addend;
3628 /* The value in the insn has been right shifted. We need to
3629 undo this, so that we can perform the address calculation
3630 in terms of bytes. */
3631 signed_addend <<= howto->rightshift;
3632 }
3633 relocation = value + signed_addend;
3634
3635 relocation -= (input_section->output_section->vma
3636 + input_section->output_offset
3637 + rel->r_offset);
3638
3639 relocation >>= howto->rightshift;
3640 signed_check = relocation;
3641
3642 if (r_type == R_ARM_THM_JUMP6)
3643 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
3644 else
3645 relocation &= howto->dst_mask;
3646 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
3647
3648 bfd_put_16 (input_bfd, relocation, hit_data);
3649
3650 /* Assumes two's complement. */
3651 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3652 return bfd_reloc_overflow;
3653
3654 return bfd_reloc_ok;
3655 }
3656
3657 case R_ARM_ALU_PCREL7_0:
3658 case R_ARM_ALU_PCREL15_8:
3659 case R_ARM_ALU_PCREL23_15:
3660 {
3661 bfd_vma insn;
3662 bfd_vma relocation;
3663
3664 insn = bfd_get_32 (input_bfd, hit_data);
3665 if (globals->use_rel)
3666 {
3667 /* Extract the addend. */
3668 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
3669 signed_addend = addend;
3670 }
3671 relocation = value + signed_addend;
3672
3673 relocation -= (input_section->output_section->vma
3674 + input_section->output_offset
3675 + rel->r_offset);
3676 insn = (insn & ~0xfff)
3677 | ((howto->bitpos << 7) & 0xf00)
3678 | ((relocation >> howto->bitpos) & 0xff);
3679 bfd_put_32 (input_bfd, value, hit_data);
3680 }
3681 return bfd_reloc_ok;
3682
3683 case R_ARM_GNU_VTINHERIT:
3684 case R_ARM_GNU_VTENTRY:
3685 return bfd_reloc_ok;
3686
3687 case R_ARM_GOTOFF32:
3688 /* Relocation is relative to the start of the
3689 global offset table. */
3690
3691 BFD_ASSERT (sgot != NULL);
3692 if (sgot == NULL)
3693 return bfd_reloc_notsupported;
3694
3695 /* If we are addressing a Thumb function, we need to adjust the
3696 address by one, so that attempts to call the function pointer will
3697 correctly interpret it as Thumb code. */
3698 if (sym_flags == STT_ARM_TFUNC)
3699 value += 1;
3700
3701 /* Note that sgot->output_offset is not involved in this
3702 calculation. We always want the start of .got. If we
3703 define _GLOBAL_OFFSET_TABLE in a different way, as is
3704 permitted by the ABI, we might have to change this
3705 calculation. */
3706 value -= sgot->output_section->vma;
3707 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3708 contents, rel->r_offset, value,
3709 rel->r_addend);
3710
3711 case R_ARM_GOTPC:
3712 /* Use global offset table as symbol value. */
3713 BFD_ASSERT (sgot != NULL);
3714
3715 if (sgot == NULL)
3716 return bfd_reloc_notsupported;
3717
3718 *unresolved_reloc_p = FALSE;
3719 value = sgot->output_section->vma;
3720 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3721 contents, rel->r_offset, value,
3722 rel->r_addend);
3723
3724 case R_ARM_GOT32:
3725 case R_ARM_GOT_PREL:
3726 /* Relocation is to the entry for this symbol in the
3727 global offset table. */
3728 if (sgot == NULL)
3729 return bfd_reloc_notsupported;
3730
3731 if (h != NULL)
3732 {
3733 bfd_vma off;
3734 bfd_boolean dyn;
3735
3736 off = h->got.offset;
3737 BFD_ASSERT (off != (bfd_vma) -1);
3738 dyn = globals->root.dynamic_sections_created;
3739
3740 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3741 || (info->shared
3742 && SYMBOL_REFERENCES_LOCAL (info, h))
3743 || (ELF_ST_VISIBILITY (h->other)
3744 && h->root.type == bfd_link_hash_undefweak))
3745 {
3746 /* This is actually a static link, or it is a -Bsymbolic link
3747 and the symbol is defined locally. We must initialize this
3748 entry in the global offset table. Since the offset must
3749 always be a multiple of 4, we use the least significant bit
3750 to record whether we have initialized it already.
3751
3752 When doing a dynamic link, we create a .rel(a).got relocation
3753 entry to initialize the value. This is done in the
3754 finish_dynamic_symbol routine. */
3755 if ((off & 1) != 0)
3756 off &= ~1;
3757 else
3758 {
3759 /* If we are addressing a Thumb function, we need to
3760 adjust the address by one, so that attempts to
3761 call the function pointer will correctly
3762 interpret it as Thumb code. */
3763 if (sym_flags == STT_ARM_TFUNC)
3764 value |= 1;
3765
3766 bfd_put_32 (output_bfd, value, sgot->contents + off);
3767 h->got.offset |= 1;
3768 }
3769 }
3770 else
3771 *unresolved_reloc_p = FALSE;
3772
3773 value = sgot->output_offset + off;
3774 }
3775 else
3776 {
3777 bfd_vma off;
3778
3779 BFD_ASSERT (local_got_offsets != NULL &&
3780 local_got_offsets[r_symndx] != (bfd_vma) -1);
3781
3782 off = local_got_offsets[r_symndx];
3783
3784 /* The offset must always be a multiple of 4. We use the
3785 least significant bit to record whether we have already
3786 generated the necessary reloc. */
3787 if ((off & 1) != 0)
3788 off &= ~1;
3789 else
3790 {
3791 /* If we are addressing a Thumb function, we need to
3792 adjust the address by one, so that attempts to
3793 call the function pointer will correctly
3794 interpret it as Thumb code. */
3795 if (sym_flags == STT_ARM_TFUNC)
3796 value |= 1;
3797
3798 if (globals->use_rel)
3799 bfd_put_32 (output_bfd, value, sgot->contents + off);
3800
3801 if (info->shared)
3802 {
3803 asection * srelgot;
3804 Elf_Internal_Rela outrel;
3805 bfd_byte *loc;
3806
3807 srelgot = (bfd_get_section_by_name
3808 (dynobj, RELOC_SECTION (globals, ".got")));
3809 BFD_ASSERT (srelgot != NULL);
3810
3811 outrel.r_addend = addend + value;
3812 outrel.r_offset = (sgot->output_section->vma
3813 + sgot->output_offset
3814 + off);
3815 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3816 loc = srelgot->contents;
3817 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
3818 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3819 }
3820
3821 local_got_offsets[r_symndx] |= 1;
3822 }
3823
3824 value = sgot->output_offset + off;
3825 }
3826 if (r_type != R_ARM_GOT32)
3827 value += sgot->output_section->vma;
3828
3829 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3830 contents, rel->r_offset, value,
3831 rel->r_addend);
3832
3833 case R_ARM_TLS_LDO32:
3834 value = value - dtpoff_base (info);
3835
3836 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3837 contents, rel->r_offset, value,
3838 rel->r_addend);
3839
3840 case R_ARM_TLS_LDM32:
3841 {
3842 bfd_vma off;
3843
3844 if (globals->sgot == NULL)
3845 abort ();
3846
3847 off = globals->tls_ldm_got.offset;
3848
3849 if ((off & 1) != 0)
3850 off &= ~1;
3851 else
3852 {
3853 /* If we don't know the module number, create a relocation
3854 for it. */
3855 if (info->shared)
3856 {
3857 Elf_Internal_Rela outrel;
3858 bfd_byte *loc;
3859
3860 if (globals->srelgot == NULL)
3861 abort ();
3862
3863 outrel.r_addend = 0;
3864 outrel.r_offset = (globals->sgot->output_section->vma
3865 + globals->sgot->output_offset + off);
3866 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
3867
3868 if (globals->use_rel)
3869 bfd_put_32 (output_bfd, outrel.r_addend,
3870 globals->sgot->contents + off);
3871
3872 loc = globals->srelgot->contents;
3873 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
3874 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3875 }
3876 else
3877 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
3878
3879 globals->tls_ldm_got.offset |= 1;
3880 }
3881
3882 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3883 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3884
3885 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3886 contents, rel->r_offset, value,
3887 rel->r_addend);
3888 }
3889
3890 case R_ARM_TLS_GD32:
3891 case R_ARM_TLS_IE32:
3892 {
3893 bfd_vma off;
3894 int indx;
3895 char tls_type;
3896
3897 if (globals->sgot == NULL)
3898 abort ();
3899
3900 indx = 0;
3901 if (h != NULL)
3902 {
3903 bfd_boolean dyn;
3904 dyn = globals->root.dynamic_sections_created;
3905 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3906 && (!info->shared
3907 || !SYMBOL_REFERENCES_LOCAL (info, h)))
3908 {
3909 *unresolved_reloc_p = FALSE;
3910 indx = h->dynindx;
3911 }
3912 off = h->got.offset;
3913 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
3914 }
3915 else
3916 {
3917 if (local_got_offsets == NULL)
3918 abort ();
3919 off = local_got_offsets[r_symndx];
3920 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
3921 }
3922
3923 if (tls_type == GOT_UNKNOWN)
3924 abort ();
3925
3926 if ((off & 1) != 0)
3927 off &= ~1;
3928 else
3929 {
3930 bfd_boolean need_relocs = FALSE;
3931 Elf_Internal_Rela outrel;
3932 bfd_byte *loc = NULL;
3933 int cur_off = off;
3934
3935 /* The GOT entries have not been initialized yet. Do it
3936 now, and emit any relocations. If both an IE GOT and a
3937 GD GOT are necessary, we emit the GD first. */
3938
3939 if ((info->shared || indx != 0)
3940 && (h == NULL
3941 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3942 || h->root.type != bfd_link_hash_undefweak))
3943 {
3944 need_relocs = TRUE;
3945 if (globals->srelgot == NULL)
3946 abort ();
3947 loc = globals->srelgot->contents;
3948 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
3949 }
3950
3951 if (tls_type & GOT_TLS_GD)
3952 {
3953 if (need_relocs)
3954 {
3955 outrel.r_addend = 0;
3956 outrel.r_offset = (globals->sgot->output_section->vma
3957 + globals->sgot->output_offset
3958 + cur_off);
3959 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
3960
3961 if (globals->use_rel)
3962 bfd_put_32 (output_bfd, outrel.r_addend,
3963 globals->sgot->contents + cur_off);
3964
3965 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3966 globals->srelgot->reloc_count++;
3967 loc += RELOC_SIZE (globals);
3968
3969 if (indx == 0)
3970 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3971 globals->sgot->contents + cur_off + 4);
3972 else
3973 {
3974 outrel.r_addend = 0;
3975 outrel.r_info = ELF32_R_INFO (indx,
3976 R_ARM_TLS_DTPOFF32);
3977 outrel.r_offset += 4;
3978
3979 if (globals->use_rel)
3980 bfd_put_32 (output_bfd, outrel.r_addend,
3981 globals->sgot->contents + cur_off + 4);
3982
3983
3984 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3985 globals->srelgot->reloc_count++;
3986 loc += RELOC_SIZE (globals);
3987 }
3988 }
3989 else
3990 {
3991 /* If we are not emitting relocations for a
3992 general dynamic reference, then we must be in a
3993 static link or an executable link with the
3994 symbol binding locally. Mark it as belonging
3995 to module 1, the executable. */
3996 bfd_put_32 (output_bfd, 1,
3997 globals->sgot->contents + cur_off);
3998 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3999 globals->sgot->contents + cur_off + 4);
4000 }
4001
4002 cur_off += 8;
4003 }
4004
4005 if (tls_type & GOT_TLS_IE)
4006 {
4007 if (need_relocs)
4008 {
4009 if (indx == 0)
4010 outrel.r_addend = value - dtpoff_base (info);
4011 else
4012 outrel.r_addend = 0;
4013 outrel.r_offset = (globals->sgot->output_section->vma
4014 + globals->sgot->output_offset
4015 + cur_off);
4016 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
4017
4018 if (globals->use_rel)
4019 bfd_put_32 (output_bfd, outrel.r_addend,
4020 globals->sgot->contents + cur_off);
4021
4022 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4023 globals->srelgot->reloc_count++;
4024 loc += RELOC_SIZE (globals);
4025 }
4026 else
4027 bfd_put_32 (output_bfd, tpoff (info, value),
4028 globals->sgot->contents + cur_off);
4029 cur_off += 4;
4030 }
4031
4032 if (h != NULL)
4033 h->got.offset |= 1;
4034 else
4035 local_got_offsets[r_symndx] |= 1;
4036 }
4037
4038 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
4039 off += 8;
4040 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
4041 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
4042
4043 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4044 contents, rel->r_offset, value,
4045 rel->r_addend);
4046 }
4047
4048 case R_ARM_TLS_LE32:
4049 if (info->shared)
4050 {
4051 (*_bfd_error_handler)
4052 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
4053 input_bfd, input_section,
4054 (long) rel->r_offset, howto->name);
4055 return FALSE;
4056 }
4057 else
4058 value = tpoff (info, value);
4059
4060 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4061 contents, rel->r_offset, value,
4062 rel->r_addend);
4063
4064 case R_ARM_V4BX:
4065 if (globals->fix_v4bx)
4066 {
4067 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
4068
4069 /* Ensure that we have a BX instruction. */
4070 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
4071
4072 /* Preserve Rm (lowest four bits) and the condition code
4073 (highest four bits). Other bits encode MOV PC,Rm. */
4074 insn = (insn & 0xf000000f) | 0x01a0f000;
4075
4076 bfd_put_32 (input_bfd, insn, hit_data);
4077 }
4078 return bfd_reloc_ok;
4079
4080 default:
4081 return bfd_reloc_notsupported;
4082 }
4083 }
4084
4085
4086 static int
4087 uleb128_size (unsigned int i)
4088 {
4089 int size;
4090 size = 1;
4091 while (i >= 0x80)
4092 {
4093 i >>= 7;
4094 size++;
4095 }
4096 return size;
4097 }
4098
4099 /* Return TRUE if the attribute has the default value (0/""). */
4100 static bfd_boolean
4101 is_default_attr (aeabi_attribute *attr)
4102 {
4103 if ((attr->type & 1) && attr->i != 0)
4104 return FALSE;
4105 if ((attr->type & 2) && attr->s && *attr->s)
4106 return FALSE;
4107
4108 return TRUE;
4109 }
4110
4111 /* Return the size of a single attribute. */
4112 static bfd_vma
4113 eabi_attr_size(int tag, aeabi_attribute *attr)
4114 {
4115 bfd_vma size;
4116
4117 if (is_default_attr (attr))
4118 return 0;
4119
4120 size = uleb128_size (tag);
4121 if (attr->type & 1)
4122 size += uleb128_size (attr->i);
4123 if (attr->type & 2)
4124 size += strlen ((char *)attr->s) + 1;
4125 return size;
4126 }
4127
4128 /* Returns the size of the eabi object attributess section. */
4129 bfd_vma
4130 elf32_arm_eabi_attr_size (bfd *abfd)
4131 {
4132 bfd_vma size;
4133 aeabi_attribute *attr;
4134 aeabi_attribute_list *list;
4135 int i;
4136
4137 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
4138 size = 16; /* 'A' <size> "aeabi" 0x1 <size>. */
4139 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
4140 size += eabi_attr_size (i, &attr[i]);
4141
4142 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
4143 list;
4144 list = list->next)
4145 size += eabi_attr_size (list->tag, &list->attr);
4146
4147 return size;
4148 }
4149
4150 static bfd_byte *
4151 write_uleb128 (bfd_byte *p, unsigned int val)
4152 {
4153 bfd_byte c;
4154 do
4155 {
4156 c = val & 0x7f;
4157 val >>= 7;
4158 if (val)
4159 c |= 0x80;
4160 *(p++) = c;
4161 }
4162 while (val);
4163 return p;
4164 }
4165
4166 /* Write attribute ATTR to butter P, and return a pointer to the following
4167 byte. */
4168 static bfd_byte *
4169 write_eabi_attribute (bfd_byte *p, int tag, aeabi_attribute *attr)
4170 {
4171 /* Suppress default entries. */
4172 if (is_default_attr(attr))
4173 return p;
4174
4175 p = write_uleb128 (p, tag);
4176 if (attr->type & 1)
4177 p = write_uleb128 (p, attr->i);
4178 if (attr->type & 2)
4179 {
4180 int len;
4181
4182 len = strlen (attr->s) + 1;
4183 memcpy (p, attr->s, len);
4184 p += len;
4185 }
4186
4187 return p;
4188 }
4189
4190 /* Write the contents of the eabi attributes section to p. */
4191 void
4192 elf32_arm_set_eabi_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size)
4193 {
4194 bfd_byte *p;
4195 aeabi_attribute *attr;
4196 aeabi_attribute_list *list;
4197 int i;
4198
4199 p = contents;
4200 *(p++) = 'A';
4201 bfd_put_32 (abfd, size - 1, p);
4202 p += 4;
4203 memcpy (p, "aeabi", 6);
4204 p += 6;
4205 *(p++) = Tag_File;
4206 bfd_put_32 (abfd, size - 11, p);
4207 p += 4;
4208
4209 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
4210 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
4211 p = write_eabi_attribute (p, i, &attr[i]);
4212
4213 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
4214 list;
4215 list = list->next)
4216 p = write_eabi_attribute (p, list->tag, &list->attr);
4217 }
4218
4219 /* Override final_link to handle EABI object attribute sections. */
4220
4221 static bfd_boolean
4222 elf32_arm_bfd_final_link (bfd *abfd, struct bfd_link_info *info)
4223 {
4224 asection *o;
4225 struct bfd_link_order *p;
4226 asection *attr_section = NULL;
4227 bfd_byte *contents;
4228 bfd_vma size = 0;
4229
4230 /* elf32_arm_merge_private_bfd_data will already have merged the
4231 object attributes. Remove the input sections from the link, and set
4232 the contents of the output secton. */
4233 for (o = abfd->sections; o != NULL; o = o->next)
4234 {
4235 if (strcmp (o->name, ".ARM.attributes") == 0)
4236 {
4237 for (p = o->map_head.link_order; p != NULL; p = p->next)
4238 {
4239 asection *input_section;
4240
4241 if (p->type != bfd_indirect_link_order)
4242 continue;
4243 input_section = p->u.indirect.section;
4244 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4245 elf_link_input_bfd ignores this section. */
4246 input_section->flags &= ~SEC_HAS_CONTENTS;
4247 }
4248
4249 size = elf32_arm_eabi_attr_size (abfd);
4250 bfd_set_section_size (abfd, o, size);
4251 attr_section = o;
4252 /* Skip this section later on. */
4253 o->map_head.link_order = NULL;
4254 }
4255 }
4256 /* Invoke the ELF linker to do all the work. */
4257 if (!bfd_elf_final_link (abfd, info))
4258 return FALSE;
4259
4260 if (attr_section)
4261 {
4262 contents = bfd_malloc(size);
4263 if (contents == NULL)
4264 return FALSE;
4265 elf32_arm_set_eabi_attr_contents (abfd, contents, size);
4266 bfd_set_section_contents (abfd, attr_section, contents, 0, size);
4267 free (contents);
4268 }
4269 return TRUE;
4270 }
4271
4272
4273 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
4274 static void
4275 arm_add_to_rel (bfd * abfd,
4276 bfd_byte * address,
4277 reloc_howto_type * howto,
4278 bfd_signed_vma increment)
4279 {
4280 bfd_signed_vma addend;
4281
4282 if (howto->type == R_ARM_THM_CALL)
4283 {
4284 int upper_insn, lower_insn;
4285 int upper, lower;
4286
4287 upper_insn = bfd_get_16 (abfd, address);
4288 lower_insn = bfd_get_16 (abfd, address + 2);
4289 upper = upper_insn & 0x7ff;
4290 lower = lower_insn & 0x7ff;
4291
4292 addend = (upper << 12) | (lower << 1);
4293 addend += increment;
4294 addend >>= 1;
4295
4296 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
4297 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
4298
4299 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
4300 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
4301 }
4302 else
4303 {
4304 bfd_vma contents;
4305
4306 contents = bfd_get_32 (abfd, address);
4307
4308 /* Get the (signed) value from the instruction. */
4309 addend = contents & howto->src_mask;
4310 if (addend & ((howto->src_mask + 1) >> 1))
4311 {
4312 bfd_signed_vma mask;
4313
4314 mask = -1;
4315 mask &= ~ howto->src_mask;
4316 addend |= mask;
4317 }
4318
4319 /* Add in the increment, (which is a byte value). */
4320 switch (howto->type)
4321 {
4322 default:
4323 addend += increment;
4324 break;
4325
4326 case R_ARM_PC24:
4327 case R_ARM_PLT32:
4328 case R_ARM_CALL:
4329 case R_ARM_JUMP24:
4330 addend <<= howto->size;
4331 addend += increment;
4332
4333 /* Should we check for overflow here ? */
4334
4335 /* Drop any undesired bits. */
4336 addend >>= howto->rightshift;
4337 break;
4338 }
4339
4340 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
4341
4342 bfd_put_32 (abfd, contents, address);
4343 }
4344 }
4345
4346 #define IS_ARM_TLS_RELOC(R_TYPE) \
4347 ((R_TYPE) == R_ARM_TLS_GD32 \
4348 || (R_TYPE) == R_ARM_TLS_LDO32 \
4349 || (R_TYPE) == R_ARM_TLS_LDM32 \
4350 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
4351 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
4352 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
4353 || (R_TYPE) == R_ARM_TLS_LE32 \
4354 || (R_TYPE) == R_ARM_TLS_IE32)
4355
4356 /* Relocate an ARM ELF section. */
4357 static bfd_boolean
4358 elf32_arm_relocate_section (bfd * output_bfd,
4359 struct bfd_link_info * info,
4360 bfd * input_bfd,
4361 asection * input_section,
4362 bfd_byte * contents,
4363 Elf_Internal_Rela * relocs,
4364 Elf_Internal_Sym * local_syms,
4365 asection ** local_sections)
4366 {
4367 Elf_Internal_Shdr *symtab_hdr;
4368 struct elf_link_hash_entry **sym_hashes;
4369 Elf_Internal_Rela *rel;
4370 Elf_Internal_Rela *relend;
4371 const char *name;
4372 struct elf32_arm_link_hash_table * globals;
4373
4374 globals = elf32_arm_hash_table (info);
4375 if (info->relocatable && !globals->use_rel)
4376 return TRUE;
4377
4378 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
4379 sym_hashes = elf_sym_hashes (input_bfd);
4380
4381 rel = relocs;
4382 relend = relocs + input_section->reloc_count;
4383 for (; rel < relend; rel++)
4384 {
4385 int r_type;
4386 reloc_howto_type * howto;
4387 unsigned long r_symndx;
4388 Elf_Internal_Sym * sym;
4389 asection * sec;
4390 struct elf_link_hash_entry * h;
4391 bfd_vma relocation;
4392 bfd_reloc_status_type r;
4393 arelent bfd_reloc;
4394 char sym_type;
4395 bfd_boolean unresolved_reloc = FALSE;
4396
4397 r_symndx = ELF32_R_SYM (rel->r_info);
4398 r_type = ELF32_R_TYPE (rel->r_info);
4399 r_type = arm_real_reloc_type (globals, r_type);
4400
4401 if ( r_type == R_ARM_GNU_VTENTRY
4402 || r_type == R_ARM_GNU_VTINHERIT)
4403 continue;
4404
4405 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
4406 howto = bfd_reloc.howto;
4407
4408 if (info->relocatable && globals->use_rel)
4409 {
4410 /* This is a relocatable link. We don't have to change
4411 anything, unless the reloc is against a section symbol,
4412 in which case we have to adjust according to where the
4413 section symbol winds up in the output section. */
4414 if (r_symndx < symtab_hdr->sh_info)
4415 {
4416 sym = local_syms + r_symndx;
4417 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4418 {
4419 sec = local_sections[r_symndx];
4420 arm_add_to_rel (input_bfd, contents + rel->r_offset,
4421 howto,
4422 (bfd_signed_vma) (sec->output_offset
4423 + sym->st_value));
4424 }
4425 }
4426
4427 continue;
4428 }
4429
4430 /* This is a final link. */
4431 h = NULL;
4432 sym = NULL;
4433 sec = NULL;
4434
4435 if (r_symndx < symtab_hdr->sh_info)
4436 {
4437 sym = local_syms + r_symndx;
4438 sym_type = ELF32_ST_TYPE (sym->st_info);
4439 sec = local_sections[r_symndx];
4440 if (globals->use_rel)
4441 {
4442 relocation = (sec->output_section->vma
4443 + sec->output_offset
4444 + sym->st_value);
4445 if ((sec->flags & SEC_MERGE)
4446 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4447 {
4448 asection *msec;
4449 bfd_vma addend, value;
4450
4451 if (howto->rightshift)
4452 {
4453 (*_bfd_error_handler)
4454 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
4455 input_bfd, input_section,
4456 (long) rel->r_offset, howto->name);
4457 return FALSE;
4458 }
4459
4460 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
4461
4462 /* Get the (signed) value from the instruction. */
4463 addend = value & howto->src_mask;
4464 if (addend & ((howto->src_mask + 1) >> 1))
4465 {
4466 bfd_signed_vma mask;
4467
4468 mask = -1;
4469 mask &= ~ howto->src_mask;
4470 addend |= mask;
4471 }
4472 msec = sec;
4473 addend =
4474 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
4475 - relocation;
4476 addend += msec->output_section->vma + msec->output_offset;
4477 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
4478 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
4479 }
4480 }
4481 else
4482 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4483 }
4484 else
4485 {
4486 bfd_boolean warned;
4487
4488 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4489 r_symndx, symtab_hdr, sym_hashes,
4490 h, sec, relocation,
4491 unresolved_reloc, warned);
4492
4493 sym_type = h->type;
4494 }
4495
4496 if (h != NULL)
4497 name = h->root.root.string;
4498 else
4499 {
4500 name = (bfd_elf_string_from_elf_section
4501 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4502 if (name == NULL || *name == '\0')
4503 name = bfd_section_name (input_bfd, sec);
4504 }
4505
4506 if (r_symndx != 0
4507 && r_type != R_ARM_NONE
4508 && (h == NULL
4509 || h->root.type == bfd_link_hash_defined
4510 || h->root.type == bfd_link_hash_defweak)
4511 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
4512 {
4513 (*_bfd_error_handler)
4514 ((sym_type == STT_TLS
4515 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4516 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4517 input_bfd,
4518 input_section,
4519 (long) rel->r_offset,
4520 howto->name,
4521 name);
4522 }
4523
4524 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
4525 input_section, contents, rel,
4526 relocation, info, sec, name,
4527 (h ? ELF_ST_TYPE (h->type) :
4528 ELF_ST_TYPE (sym->st_info)), h,
4529 &unresolved_reloc);
4530
4531 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4532 because such sections are not SEC_ALLOC and thus ld.so will
4533 not process them. */
4534 if (unresolved_reloc
4535 && !((input_section->flags & SEC_DEBUGGING) != 0
4536 && h->def_dynamic))
4537 {
4538 (*_bfd_error_handler)
4539 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4540 input_bfd,
4541 input_section,
4542 (long) rel->r_offset,
4543 howto->name,
4544 h->root.root.string);
4545 return FALSE;
4546 }
4547
4548 if (r != bfd_reloc_ok)
4549 {
4550 const char * msg = (const char *) 0;
4551
4552 switch (r)
4553 {
4554 case bfd_reloc_overflow:
4555 /* If the overflowing reloc was to an undefined symbol,
4556 we have already printed one error message and there
4557 is no point complaining again. */
4558 if ((! h ||
4559 h->root.type != bfd_link_hash_undefined)
4560 && (!((*info->callbacks->reloc_overflow)
4561 (info, (h ? &h->root : NULL), name, howto->name,
4562 (bfd_vma) 0, input_bfd, input_section,
4563 rel->r_offset))))
4564 return FALSE;
4565 break;
4566
4567 case bfd_reloc_undefined:
4568 if (!((*info->callbacks->undefined_symbol)
4569 (info, name, input_bfd, input_section,
4570 rel->r_offset, TRUE)))
4571 return FALSE;
4572 break;
4573
4574 case bfd_reloc_outofrange:
4575 msg = _("internal error: out of range error");
4576 goto common_error;
4577
4578 case bfd_reloc_notsupported:
4579 msg = _("internal error: unsupported relocation error");
4580 goto common_error;
4581
4582 case bfd_reloc_dangerous:
4583 msg = _("internal error: dangerous error");
4584 goto common_error;
4585
4586 default:
4587 msg = _("internal error: unknown error");
4588 /* fall through */
4589
4590 common_error:
4591 if (!((*info->callbacks->warning)
4592 (info, msg, name, input_bfd, input_section,
4593 rel->r_offset)))
4594 return FALSE;
4595 break;
4596 }
4597 }
4598 }
4599
4600 return TRUE;
4601 }
4602
4603 /* Allocate/find an object attribute. */
4604 static aeabi_attribute *
4605 elf32_arm_new_eabi_attr (bfd *abfd, int tag)
4606 {
4607 aeabi_attribute *attr;
4608 aeabi_attribute_list *list;
4609 aeabi_attribute_list *p;
4610 aeabi_attribute_list **lastp;
4611
4612
4613 if (tag < NUM_KNOWN_ATTRIBUTES)
4614 {
4615 /* Knwon tags are preallocated. */
4616 attr = &elf32_arm_tdata (abfd)->known_eabi_attributes[tag];
4617 }
4618 else
4619 {
4620 /* Create a new tag. */
4621 list = (aeabi_attribute_list *)
4622 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
4623 memset (list, 0, sizeof (aeabi_attribute_list));
4624 list->tag = tag;
4625 /* Keep the tag list in order. */
4626 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
4627 for (p = *lastp; p; p = p->next)
4628 {
4629 if (tag < p->tag)
4630 break;
4631 lastp = &p->next;
4632 }
4633 list->next = *lastp;
4634 *lastp = list;
4635 attr = &list->attr;
4636 }
4637
4638 return attr;
4639 }
4640
4641 int
4642 elf32_arm_get_eabi_attr_int (bfd *abfd, int tag)
4643 {
4644 aeabi_attribute_list *p;
4645
4646 if (tag < NUM_KNOWN_ATTRIBUTES)
4647 {
4648 /* Knwon tags are preallocated. */
4649 return elf32_arm_tdata (abfd)->known_eabi_attributes[tag].i;
4650 }
4651 else
4652 {
4653 for (p = elf32_arm_tdata (abfd)->other_eabi_attributes;
4654 p;
4655 p = p->next)
4656 {
4657 if (tag == p->tag)
4658 return p->attr.i;
4659 if (tag < p->tag)
4660 break;
4661 }
4662 return 0;
4663 }
4664 }
4665
4666 void
4667 elf32_arm_add_eabi_attr_int (bfd *abfd, int tag, unsigned int i)
4668 {
4669 aeabi_attribute *attr;
4670
4671 attr = elf32_arm_new_eabi_attr (abfd, tag);
4672 attr->type = 1;
4673 attr->i = i;
4674 }
4675
4676 static char *
4677 attr_strdup (bfd *abfd, const char * s)
4678 {
4679 char * p;
4680 int len;
4681
4682 len = strlen (s) + 1;
4683 p = (char *)bfd_alloc(abfd, len);
4684 return memcpy (p, s, len);
4685 }
4686
4687 void
4688 elf32_arm_add_eabi_attr_string (bfd *abfd, int tag, const char *s)
4689 {
4690 aeabi_attribute *attr;
4691
4692 attr = elf32_arm_new_eabi_attr (abfd, tag);
4693 attr->type = 2;
4694 attr->s = attr_strdup (abfd, s);
4695 }
4696
4697 void
4698 elf32_arm_add_eabi_attr_compat (bfd *abfd, unsigned int i, const char *s)
4699 {
4700 aeabi_attribute_list *list;
4701 aeabi_attribute_list *p;
4702 aeabi_attribute_list **lastp;
4703
4704 list = (aeabi_attribute_list *)
4705 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
4706 memset (list, 0, sizeof (aeabi_attribute_list));
4707 list->tag = Tag_compatibility;
4708 list->attr.type = 3;
4709 list->attr.i = i;
4710 list->attr.s = attr_strdup (abfd, s);
4711
4712 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
4713 for (p = *lastp; p; p = p->next)
4714 {
4715 int cmp;
4716 if (p->tag != Tag_compatibility)
4717 break;
4718 cmp = strcmp(s, p->attr.s);
4719 if (cmp < 0 || (cmp == 0 && i < p->attr.i))
4720 break;
4721 lastp = &p->next;
4722 }
4723 list->next = *lastp;
4724 *lastp = list;
4725 }
4726
4727 /* Set the right machine number. */
4728
4729 static bfd_boolean
4730 elf32_arm_object_p (bfd *abfd)
4731 {
4732 unsigned int mach;
4733
4734 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
4735
4736 if (mach != bfd_mach_arm_unknown)
4737 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
4738
4739 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
4740 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
4741
4742 else
4743 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
4744
4745 return TRUE;
4746 }
4747
4748 /* Function to keep ARM specific flags in the ELF header. */
4749
4750 static bfd_boolean
4751 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
4752 {
4753 if (elf_flags_init (abfd)
4754 && elf_elfheader (abfd)->e_flags != flags)
4755 {
4756 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
4757 {
4758 if (flags & EF_ARM_INTERWORK)
4759 (*_bfd_error_handler)
4760 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
4761 abfd);
4762 else
4763 _bfd_error_handler
4764 (_("Warning: Clearing the interworking flag of %B due to outside request"),
4765 abfd);
4766 }
4767 }
4768 else
4769 {
4770 elf_elfheader (abfd)->e_flags = flags;
4771 elf_flags_init (abfd) = TRUE;
4772 }
4773
4774 return TRUE;
4775 }
4776
4777 /* Copy the eabi object attribute from IBFD to OBFD. */
4778 static void
4779 copy_eabi_attributes (bfd *ibfd, bfd *obfd)
4780 {
4781 aeabi_attribute *in_attr;
4782 aeabi_attribute *out_attr;
4783 aeabi_attribute_list *list;
4784 int i;
4785
4786 in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
4787 out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
4788 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
4789 {
4790 out_attr->i = in_attr->i;
4791 if (in_attr->s && *in_attr->s)
4792 out_attr->s = attr_strdup (obfd, in_attr->s);
4793 in_attr++;
4794 out_attr++;
4795 }
4796
4797 for (list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
4798 list;
4799 list = list->next)
4800 {
4801 in_attr = &list->attr;
4802 switch (in_attr->type)
4803 {
4804 case 1:
4805 elf32_arm_add_eabi_attr_int (obfd, list->tag, in_attr->i);
4806 break;
4807 case 2:
4808 elf32_arm_add_eabi_attr_string (obfd, list->tag, in_attr->s);
4809 break;
4810 case 3:
4811 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
4812 break;
4813 default:
4814 abort();
4815 }
4816 }
4817 }
4818
4819
4820 /* Copy backend specific data from one object module to another. */
4821
4822 static bfd_boolean
4823 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4824 {
4825 flagword in_flags;
4826 flagword out_flags;
4827
4828 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4829 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4830 return TRUE;
4831
4832 in_flags = elf_elfheader (ibfd)->e_flags;
4833 out_flags = elf_elfheader (obfd)->e_flags;
4834
4835 if (elf_flags_init (obfd)
4836 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
4837 && in_flags != out_flags)
4838 {
4839 /* Cannot mix APCS26 and APCS32 code. */
4840 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
4841 return FALSE;
4842
4843 /* Cannot mix float APCS and non-float APCS code. */
4844 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
4845 return FALSE;
4846
4847 /* If the src and dest have different interworking flags
4848 then turn off the interworking bit. */
4849 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
4850 {
4851 if (out_flags & EF_ARM_INTERWORK)
4852 _bfd_error_handler
4853 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
4854 obfd, ibfd);
4855
4856 in_flags &= ~EF_ARM_INTERWORK;
4857 }
4858
4859 /* Likewise for PIC, though don't warn for this case. */
4860 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
4861 in_flags &= ~EF_ARM_PIC;
4862 }
4863
4864 elf_elfheader (obfd)->e_flags = in_flags;
4865 elf_flags_init (obfd) = TRUE;
4866
4867 /* Also copy the EI_OSABI field. */
4868 elf_elfheader (obfd)->e_ident[EI_OSABI] =
4869 elf_elfheader (ibfd)->e_ident[EI_OSABI];
4870
4871 /* Copy EABI object attributes. */
4872 copy_eabi_attributes (ibfd, obfd);
4873
4874 return TRUE;
4875 }
4876
4877 /* Values for Tag_ABI_PCS_R9_use. */
4878 enum
4879 {
4880 AEABI_R9_V6,
4881 AEABI_R9_SB,
4882 AEABI_R9_TLS,
4883 AEABI_R9_unused
4884 };
4885
4886 /* Values for Tag_ABI_PCS_RW_data. */
4887 enum
4888 {
4889 AEABI_PCS_RW_data_absolute,
4890 AEABI_PCS_RW_data_PCrel,
4891 AEABI_PCS_RW_data_SBrel,
4892 AEABI_PCS_RW_data_unused
4893 };
4894
4895 /* Values for Tag_ABI_enum_size. */
4896 enum
4897 {
4898 AEABI_enum_unused,
4899 AEABI_enum_short,
4900 AEABI_enum_wide,
4901 AEABI_enum_forced_wide
4902 };
4903
4904 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
4905 are conflicting attributes. */
4906 static bfd_boolean
4907 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
4908 {
4909 aeabi_attribute *in_attr;
4910 aeabi_attribute *out_attr;
4911 aeabi_attribute_list *in_list;
4912 aeabi_attribute_list *out_list;
4913 /* Some tags have 0 = don't care, 1 = strong requirement,
4914 2 = weak requirement. */
4915 static const int order_312[3] = {3, 1, 2};
4916 int i;
4917
4918 if (!elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i)
4919 {
4920 /* This is the first object. Copy the attributes. */
4921 copy_eabi_attributes (ibfd, obfd);
4922 return TRUE;
4923 }
4924
4925 /* Use the Tag_null value to indicate the attributes have been
4926 initialized. */
4927 elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i = 1;
4928
4929 in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
4930 out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
4931 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
4932 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
4933 {
4934 /* Ignore mismatches if teh object doesn't use floating point. */
4935 if (out_attr[Tag_ABI_FP_number_model].i == 0)
4936 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
4937 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
4938 {
4939 _bfd_error_handler
4940 (_("ERROR: %B uses VFP register arguments, %B does not"),
4941 ibfd, obfd);
4942 return FALSE;
4943 }
4944 }
4945
4946 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
4947 {
4948 /* Merge this attribute with existing attributes. */
4949 switch (i)
4950 {
4951 case Tag_CPU_raw_name:
4952 case Tag_CPU_name:
4953 /* Use whichever has the greatest architecture requirements. */
4954 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i)
4955 out_attr[i].s = attr_strdup(obfd, in_attr[i].s);
4956 break;
4957
4958 case Tag_ABI_optimization_goals:
4959 case Tag_ABI_FP_optimization_goals:
4960 /* Use the first value seen. */
4961 break;
4962
4963 case Tag_CPU_arch:
4964 case Tag_ARM_ISA_use:
4965 case Tag_THUMB_ISA_use:
4966 case Tag_VFP_arch:
4967 case Tag_WMMX_arch:
4968 case Tag_NEON_arch:
4969 /* ??? Do NEON and WMMX conflict? */
4970 case Tag_ABI_FP_rounding:
4971 case Tag_ABI_FP_denormal:
4972 case Tag_ABI_FP_exceptions:
4973 case Tag_ABI_FP_user_exceptions:
4974 case Tag_ABI_FP_number_model:
4975 case Tag_ABI_align8_preserved:
4976 case Tag_ABI_HardFP_use:
4977 /* Use the largest value specified. */
4978 if (in_attr[i].i > out_attr[i].i)
4979 out_attr[i].i = in_attr[i].i;
4980 break;
4981
4982 case Tag_CPU_arch_profile:
4983 /* Warn if conflicting architecture profiles used. */
4984 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
4985 {
4986 _bfd_error_handler
4987 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
4988 ibfd, in_attr[i].i, out_attr[i].i);
4989 return FALSE;
4990 }
4991 if (in_attr[i].i)
4992 out_attr[i].i = in_attr[i].i;
4993 break;
4994 case Tag_PCS_config:
4995 if (out_attr[i].i == 0)
4996 out_attr[i].i = in_attr[i].i;
4997 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
4998 {
4999 /* It's sometimes ok to mix different configs, so this is only
5000 a warning. */
5001 _bfd_error_handler
5002 (_("Warning: %B: Conflicting platform configuration"), ibfd);
5003 }
5004 break;
5005 case Tag_ABI_PCS_R9_use:
5006 if (out_attr[i].i != AEABI_R9_unused
5007 && in_attr[i].i != AEABI_R9_unused)
5008 {
5009 _bfd_error_handler
5010 (_("ERROR: %B: Conflicting use of R9"), ibfd);
5011 return FALSE;
5012 }
5013 if (out_attr[i].i == AEABI_R9_unused)
5014 out_attr[i].i = in_attr[i].i;
5015 break;
5016 case Tag_ABI_PCS_RW_data:
5017 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
5018 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
5019 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
5020 {
5021 _bfd_error_handler
5022 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
5023 ibfd);
5024 return FALSE;
5025 }
5026 /* Use the smallest value specified. */
5027 if (in_attr[i].i < out_attr[i].i)
5028 out_attr[i].i = in_attr[i].i;
5029 break;
5030 case Tag_ABI_PCS_RO_data:
5031 /* Use the smallest value specified. */
5032 if (in_attr[i].i < out_attr[i].i)
5033 out_attr[i].i = in_attr[i].i;
5034 break;
5035 case Tag_ABI_PCS_GOT_use:
5036 if (in_attr[i].i > 2 || out_attr[i].i > 2
5037 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
5038 out_attr[i].i = in_attr[i].i;
5039 break;
5040 case Tag_ABI_PCS_wchar_t:
5041 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
5042 {
5043 _bfd_error_handler
5044 (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
5045 return FALSE;
5046 }
5047 if (in_attr[i].i)
5048 out_attr[i].i = in_attr[i].i;
5049 break;
5050 case Tag_ABI_align8_needed:
5051 /* ??? Check against Tag_ABI_align8_preserved. */
5052 if (in_attr[i].i > 2 || out_attr[i].i > 2
5053 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
5054 out_attr[i].i = in_attr[i].i;
5055 break;
5056 case Tag_ABI_enum_size:
5057 if (in_attr[i].i != AEABI_enum_unused)
5058 {
5059 if (out_attr[i].i == AEABI_enum_unused
5060 || out_attr[i].i == AEABI_enum_forced_wide)
5061 {
5062 /* The existing object is compatible with anything.
5063 Use whatever requirements the new object has. */
5064 out_attr[i].i = in_attr[i].i;
5065 }
5066 else if (in_attr[i].i != AEABI_enum_forced_wide
5067 && out_attr[i].i != in_attr[i].i)
5068 {
5069 _bfd_error_handler
5070 (_("ERROR: %B: Conflicting enum sizes"), ibfd);
5071 }
5072 }
5073 break;
5074 case Tag_ABI_VFP_args:
5075 /* Aready done. */
5076 break;
5077 case Tag_ABI_WMMX_args:
5078 if (in_attr[i].i != out_attr[i].i)
5079 {
5080 _bfd_error_handler
5081 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
5082 ibfd, obfd);
5083 return FALSE;
5084 }
5085 break;
5086 default: /* All known attributes should be explicitly covered. */
5087 abort ();
5088 }
5089 }
5090
5091 in_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
5092 out_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
5093 while (in_list && in_list->tag == Tag_compatibility)
5094 {
5095 in_attr = &in_list->attr;
5096 if (in_attr->i == 0)
5097 continue;
5098 if (in_attr->i == 1)
5099 {
5100 _bfd_error_handler
5101 (_("ERROR: %B: Must be processed by '%s' toolchain"),
5102 ibfd, in_attr->s);
5103 return FALSE;
5104 }
5105 if (!out_list || out_list->tag != Tag_compatibility
5106 || strcmp (in_attr->s, out_list->attr.s) != 0)
5107 {
5108 /* Add this compatibility tag to the output. */
5109 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
5110 continue;
5111 }
5112 out_attr = &out_list->attr;
5113 /* Check all the input tags with the same identifier. */
5114 for (;;)
5115 {
5116 if (out_list->tag != Tag_compatibility
5117 || in_attr->i != out_attr->i
5118 || strcmp (in_attr->s, out_attr->s) != 0)
5119 {
5120 _bfd_error_handler
5121 (_("ERROR: %B: Incompatible object tag '%s':%d"),
5122 ibfd, in_attr->s, in_attr->i);
5123 return FALSE;
5124 }
5125 in_list = in_list->next;
5126 if (in_list->tag != Tag_compatibility
5127 || strcmp (in_attr->s, in_list->attr.s) != 0)
5128 break;
5129 in_attr = &in_list->attr;
5130 out_list = out_list->next;
5131 if (out_list)
5132 out_attr = &out_list->attr;
5133 }
5134
5135 /* Check the output doesn't have extra tags with this identifier. */
5136 if (out_list && out_list->tag == Tag_compatibility
5137 && strcmp (in_attr->s, out_list->attr.s) == 0)
5138 {
5139 _bfd_error_handler
5140 (_("ERROR: %B: Incompatible object tag '%s':%d"),
5141 ibfd, in_attr->s, out_list->attr.i);
5142 return FALSE;
5143 }
5144 }
5145
5146 for (; in_list; in_list = in_list->next)
5147 {
5148 if ((in_list->tag & 128) < 64)
5149 {
5150 _bfd_error_handler
5151 (_("Warning: %B: Unknown EABI object attribute %d"),
5152 ibfd, in_list->tag);
5153 break;
5154 }
5155 }
5156 return TRUE;
5157 }
5158
5159
5160 /* Return TRUE if the two EABI versions are incompatible. */
5161
5162 static bfd_boolean
5163 elf32_arm_versions_compatible (unsigned iver, unsigned over)
5164 {
5165 /* v4 and v5 are the same spec before and after it was released,
5166 so allow mixing them. */
5167 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
5168 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
5169 return TRUE;
5170
5171 return (iver == over);
5172 }
5173
5174 /* Merge backend specific data from an object file to the output
5175 object file when linking. */
5176
5177 static bfd_boolean
5178 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
5179 {
5180 flagword out_flags;
5181 flagword in_flags;
5182 bfd_boolean flags_compatible = TRUE;
5183 asection *sec;
5184
5185 /* Check if we have the same endianess. */
5186 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
5187 return FALSE;
5188
5189 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5190 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5191 return TRUE;
5192
5193 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
5194 return FALSE;
5195
5196 /* The input BFD must have had its flags initialised. */
5197 /* The following seems bogus to me -- The flags are initialized in
5198 the assembler but I don't think an elf_flags_init field is
5199 written into the object. */
5200 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5201
5202 in_flags = elf_elfheader (ibfd)->e_flags;
5203 out_flags = elf_elfheader (obfd)->e_flags;
5204
5205 if (!elf_flags_init (obfd))
5206 {
5207 /* If the input is the default architecture and had the default
5208 flags then do not bother setting the flags for the output
5209 architecture, instead allow future merges to do this. If no
5210 future merges ever set these flags then they will retain their
5211 uninitialised values, which surprise surprise, correspond
5212 to the default values. */
5213 if (bfd_get_arch_info (ibfd)->the_default
5214 && elf_elfheader (ibfd)->e_flags == 0)
5215 return TRUE;
5216
5217 elf_flags_init (obfd) = TRUE;
5218 elf_elfheader (obfd)->e_flags = in_flags;
5219
5220 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
5221 && bfd_get_arch_info (obfd)->the_default)
5222 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
5223
5224 return TRUE;
5225 }
5226
5227 /* Determine what should happen if the input ARM architecture
5228 does not match the output ARM architecture. */
5229 if (! bfd_arm_merge_machines (ibfd, obfd))
5230 return FALSE;
5231
5232 /* Identical flags must be compatible. */
5233 if (in_flags == out_flags)
5234 return TRUE;
5235
5236 /* Check to see if the input BFD actually contains any sections. If
5237 not, its flags may not have been initialised either, but it
5238 cannot actually cause any incompatiblity. Do not short-circuit
5239 dynamic objects; their section list may be emptied by
5240 elf_link_add_object_symbols.
5241
5242 Also check to see if there are no code sections in the input.
5243 In this case there is no need to check for code specific flags.
5244 XXX - do we need to worry about floating-point format compatability
5245 in data sections ? */
5246 if (!(ibfd->flags & DYNAMIC))
5247 {
5248 bfd_boolean null_input_bfd = TRUE;
5249 bfd_boolean only_data_sections = TRUE;
5250
5251 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5252 {
5253 /* Ignore synthetic glue sections. */
5254 if (strcmp (sec->name, ".glue_7")
5255 && strcmp (sec->name, ".glue_7t"))
5256 {
5257 if ((bfd_get_section_flags (ibfd, sec)
5258 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5259 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5260 only_data_sections = FALSE;
5261
5262 null_input_bfd = FALSE;
5263 break;
5264 }
5265 }
5266
5267 if (null_input_bfd || only_data_sections)
5268 return TRUE;
5269 }
5270
5271 /* Complain about various flag mismatches. */
5272 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
5273 EF_ARM_EABI_VERSION (out_flags)))
5274 {
5275 _bfd_error_handler
5276 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
5277 ibfd, obfd,
5278 (in_flags & EF_ARM_EABIMASK) >> 24,
5279 (out_flags & EF_ARM_EABIMASK) >> 24);
5280 return FALSE;
5281 }
5282
5283 /* Not sure what needs to be checked for EABI versions >= 1. */
5284 /* VxWorks libraries do not use these flags. */
5285 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
5286 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
5287 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
5288 {
5289 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
5290 {
5291 _bfd_error_handler
5292 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
5293 ibfd, obfd,
5294 in_flags & EF_ARM_APCS_26 ? 26 : 32,
5295 out_flags & EF_ARM_APCS_26 ? 26 : 32);
5296 flags_compatible = FALSE;
5297 }
5298
5299 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
5300 {
5301 if (in_flags & EF_ARM_APCS_FLOAT)
5302 _bfd_error_handler
5303 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
5304 ibfd, obfd);
5305 else
5306 _bfd_error_handler
5307 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
5308 ibfd, obfd);
5309
5310 flags_compatible = FALSE;
5311 }
5312
5313 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
5314 {
5315 if (in_flags & EF_ARM_VFP_FLOAT)
5316 _bfd_error_handler
5317 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
5318 ibfd, obfd);
5319 else
5320 _bfd_error_handler
5321 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
5322 ibfd, obfd);
5323
5324 flags_compatible = FALSE;
5325 }
5326
5327 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
5328 {
5329 if (in_flags & EF_ARM_MAVERICK_FLOAT)
5330 _bfd_error_handler
5331 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
5332 ibfd, obfd);
5333 else
5334 _bfd_error_handler
5335 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
5336 ibfd, obfd);
5337
5338 flags_compatible = FALSE;
5339 }
5340
5341 #ifdef EF_ARM_SOFT_FLOAT
5342 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
5343 {
5344 /* We can allow interworking between code that is VFP format
5345 layout, and uses either soft float or integer regs for
5346 passing floating point arguments and results. We already
5347 know that the APCS_FLOAT flags match; similarly for VFP
5348 flags. */
5349 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
5350 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
5351 {
5352 if (in_flags & EF_ARM_SOFT_FLOAT)
5353 _bfd_error_handler
5354 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
5355 ibfd, obfd);
5356 else
5357 _bfd_error_handler
5358 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
5359 ibfd, obfd);
5360
5361 flags_compatible = FALSE;
5362 }
5363 }
5364 #endif
5365
5366 /* Interworking mismatch is only a warning. */
5367 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
5368 {
5369 if (in_flags & EF_ARM_INTERWORK)
5370 {
5371 _bfd_error_handler
5372 (_("Warning: %B supports interworking, whereas %B does not"),
5373 ibfd, obfd);
5374 }
5375 else
5376 {
5377 _bfd_error_handler
5378 (_("Warning: %B does not support interworking, whereas %B does"),
5379 ibfd, obfd);
5380 }
5381 }
5382 }
5383
5384 return flags_compatible;
5385 }
5386
5387 /* Display the flags field. */
5388
5389 static bfd_boolean
5390 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
5391 {
5392 FILE * file = (FILE *) ptr;
5393 unsigned long flags;
5394
5395 BFD_ASSERT (abfd != NULL && ptr != NULL);
5396
5397 /* Print normal ELF private data. */
5398 _bfd_elf_print_private_bfd_data (abfd, ptr);
5399
5400 flags = elf_elfheader (abfd)->e_flags;
5401 /* Ignore init flag - it may not be set, despite the flags field
5402 containing valid data. */
5403
5404 /* xgettext:c-format */
5405 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5406
5407 switch (EF_ARM_EABI_VERSION (flags))
5408 {
5409 case EF_ARM_EABI_UNKNOWN:
5410 /* The following flag bits are GNU extensions and not part of the
5411 official ARM ELF extended ABI. Hence they are only decoded if
5412 the EABI version is not set. */
5413 if (flags & EF_ARM_INTERWORK)
5414 fprintf (file, _(" [interworking enabled]"));
5415
5416 if (flags & EF_ARM_APCS_26)
5417 fprintf (file, " [APCS-26]");
5418 else
5419 fprintf (file, " [APCS-32]");
5420
5421 if (flags & EF_ARM_VFP_FLOAT)
5422 fprintf (file, _(" [VFP float format]"));
5423 else if (flags & EF_ARM_MAVERICK_FLOAT)
5424 fprintf (file, _(" [Maverick float format]"));
5425 else
5426 fprintf (file, _(" [FPA float format]"));
5427
5428 if (flags & EF_ARM_APCS_FLOAT)
5429 fprintf (file, _(" [floats passed in float registers]"));
5430
5431 if (flags & EF_ARM_PIC)
5432 fprintf (file, _(" [position independent]"));
5433
5434 if (flags & EF_ARM_NEW_ABI)
5435 fprintf (file, _(" [new ABI]"));
5436
5437 if (flags & EF_ARM_OLD_ABI)
5438 fprintf (file, _(" [old ABI]"));
5439
5440 if (flags & EF_ARM_SOFT_FLOAT)
5441 fprintf (file, _(" [software FP]"));
5442
5443 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
5444 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
5445 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
5446 | EF_ARM_MAVERICK_FLOAT);
5447 break;
5448
5449 case EF_ARM_EABI_VER1:
5450 fprintf (file, _(" [Version1 EABI]"));
5451
5452 if (flags & EF_ARM_SYMSARESORTED)
5453 fprintf (file, _(" [sorted symbol table]"));
5454 else
5455 fprintf (file, _(" [unsorted symbol table]"));
5456
5457 flags &= ~ EF_ARM_SYMSARESORTED;
5458 break;
5459
5460 case EF_ARM_EABI_VER2:
5461 fprintf (file, _(" [Version2 EABI]"));
5462
5463 if (flags & EF_ARM_SYMSARESORTED)
5464 fprintf (file, _(" [sorted symbol table]"));
5465 else
5466 fprintf (file, _(" [unsorted symbol table]"));
5467
5468 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
5469 fprintf (file, _(" [dynamic symbols use segment index]"));
5470
5471 if (flags & EF_ARM_MAPSYMSFIRST)
5472 fprintf (file, _(" [mapping symbols precede others]"));
5473
5474 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
5475 | EF_ARM_MAPSYMSFIRST);
5476 break;
5477
5478 case EF_ARM_EABI_VER3:
5479 fprintf (file, _(" [Version3 EABI]"));
5480 break;
5481
5482 case EF_ARM_EABI_VER4:
5483 fprintf (file, _(" [Version4 EABI]"));
5484 goto eabi;
5485
5486 case EF_ARM_EABI_VER5:
5487 fprintf (file, _(" [Version5 EABI]"));
5488 eabi:
5489 if (flags & EF_ARM_BE8)
5490 fprintf (file, _(" [BE8]"));
5491
5492 if (flags & EF_ARM_LE8)
5493 fprintf (file, _(" [LE8]"));
5494
5495 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
5496 break;
5497
5498 default:
5499 fprintf (file, _(" <EABI version unrecognised>"));
5500 break;
5501 }
5502
5503 flags &= ~ EF_ARM_EABIMASK;
5504
5505 if (flags & EF_ARM_RELEXEC)
5506 fprintf (file, _(" [relocatable executable]"));
5507
5508 if (flags & EF_ARM_HASENTRY)
5509 fprintf (file, _(" [has entry point]"));
5510
5511 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
5512
5513 if (flags)
5514 fprintf (file, _("<Unrecognised flag bits set>"));
5515
5516 fputc ('\n', file);
5517
5518 return TRUE;
5519 }
5520
5521 static int
5522 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
5523 {
5524 switch (ELF_ST_TYPE (elf_sym->st_info))
5525 {
5526 case STT_ARM_TFUNC:
5527 return ELF_ST_TYPE (elf_sym->st_info);
5528
5529 case STT_ARM_16BIT:
5530 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
5531 This allows us to distinguish between data used by Thumb instructions
5532 and non-data (which is probably code) inside Thumb regions of an
5533 executable. */
5534 if (type != STT_OBJECT && type != STT_TLS)
5535 return ELF_ST_TYPE (elf_sym->st_info);
5536 break;
5537
5538 default:
5539 break;
5540 }
5541
5542 return type;
5543 }
5544
5545 static asection *
5546 elf32_arm_gc_mark_hook (asection * sec,
5547 struct bfd_link_info * info ATTRIBUTE_UNUSED,
5548 Elf_Internal_Rela * rel,
5549 struct elf_link_hash_entry * h,
5550 Elf_Internal_Sym * sym)
5551 {
5552 if (h != NULL)
5553 {
5554 switch (ELF32_R_TYPE (rel->r_info))
5555 {
5556 case R_ARM_GNU_VTINHERIT:
5557 case R_ARM_GNU_VTENTRY:
5558 break;
5559
5560 default:
5561 switch (h->root.type)
5562 {
5563 case bfd_link_hash_defined:
5564 case bfd_link_hash_defweak:
5565 return h->root.u.def.section;
5566
5567 case bfd_link_hash_common:
5568 return h->root.u.c.p->section;
5569
5570 default:
5571 break;
5572 }
5573 }
5574 }
5575 else
5576 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5577
5578 return NULL;
5579 }
5580
5581 /* Update the got entry reference counts for the section being removed. */
5582
5583 static bfd_boolean
5584 elf32_arm_gc_sweep_hook (bfd * abfd,
5585 struct bfd_link_info * info,
5586 asection * sec,
5587 const Elf_Internal_Rela * relocs)
5588 {
5589 Elf_Internal_Shdr *symtab_hdr;
5590 struct elf_link_hash_entry **sym_hashes;
5591 bfd_signed_vma *local_got_refcounts;
5592 const Elf_Internal_Rela *rel, *relend;
5593 struct elf32_arm_link_hash_table * globals;
5594
5595 globals = elf32_arm_hash_table (info);
5596
5597 elf_section_data (sec)->local_dynrel = NULL;
5598
5599 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5600 sym_hashes = elf_sym_hashes (abfd);
5601 local_got_refcounts = elf_local_got_refcounts (abfd);
5602
5603 relend = relocs + sec->reloc_count;
5604 for (rel = relocs; rel < relend; rel++)
5605 {
5606 unsigned long r_symndx;
5607 struct elf_link_hash_entry *h = NULL;
5608 int r_type;
5609
5610 r_symndx = ELF32_R_SYM (rel->r_info);
5611 if (r_symndx >= symtab_hdr->sh_info)
5612 {
5613 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5614 while (h->root.type == bfd_link_hash_indirect
5615 || h->root.type == bfd_link_hash_warning)
5616 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5617 }
5618
5619 r_type = ELF32_R_TYPE (rel->r_info);
5620 r_type = arm_real_reloc_type (globals, r_type);
5621 switch (r_type)
5622 {
5623 case R_ARM_GOT32:
5624 case R_ARM_GOT_PREL:
5625 case R_ARM_TLS_GD32:
5626 case R_ARM_TLS_IE32:
5627 if (h != NULL)
5628 {
5629 if (h->got.refcount > 0)
5630 h->got.refcount -= 1;
5631 }
5632 else if (local_got_refcounts != NULL)
5633 {
5634 if (local_got_refcounts[r_symndx] > 0)
5635 local_got_refcounts[r_symndx] -= 1;
5636 }
5637 break;
5638
5639 case R_ARM_TLS_LDM32:
5640 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
5641 break;
5642
5643 case R_ARM_ABS32:
5644 case R_ARM_REL32:
5645 case R_ARM_PC24:
5646 case R_ARM_PLT32:
5647 case R_ARM_CALL:
5648 case R_ARM_JUMP24:
5649 case R_ARM_PREL31:
5650 case R_ARM_THM_CALL:
5651 /* Should the interworking branches be here also? */
5652
5653 if (h != NULL)
5654 {
5655 struct elf32_arm_link_hash_entry *eh;
5656 struct elf32_arm_relocs_copied **pp;
5657 struct elf32_arm_relocs_copied *p;
5658
5659 eh = (struct elf32_arm_link_hash_entry *) h;
5660
5661 if (h->plt.refcount > 0)
5662 {
5663 h->plt.refcount -= 1;
5664 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL)
5665 eh->plt_thumb_refcount--;
5666 }
5667
5668 if (r_type == R_ARM_ABS32
5669 || r_type == R_ARM_REL32)
5670 {
5671 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
5672 pp = &p->next)
5673 if (p->section == sec)
5674 {
5675 p->count -= 1;
5676 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
5677 p->pc_count -= 1;
5678 if (p->count == 0)
5679 *pp = p->next;
5680 break;
5681 }
5682 }
5683 }
5684 break;
5685
5686 default:
5687 break;
5688 }
5689 }
5690
5691 return TRUE;
5692 }
5693
5694 /* Look through the relocs for a section during the first phase. */
5695
5696 static bfd_boolean
5697 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
5698 asection *sec, const Elf_Internal_Rela *relocs)
5699 {
5700 Elf_Internal_Shdr *symtab_hdr;
5701 struct elf_link_hash_entry **sym_hashes;
5702 struct elf_link_hash_entry **sym_hashes_end;
5703 const Elf_Internal_Rela *rel;
5704 const Elf_Internal_Rela *rel_end;
5705 bfd *dynobj;
5706 asection *sreloc;
5707 bfd_vma *local_got_offsets;
5708 struct elf32_arm_link_hash_table *htab;
5709
5710 if (info->relocatable)
5711 return TRUE;
5712
5713 htab = elf32_arm_hash_table (info);
5714 sreloc = NULL;
5715
5716 /* Create dynamic sections for relocatable executables so that we can
5717 copy relocations. */
5718 if (htab->root.is_relocatable_executable
5719 && ! htab->root.dynamic_sections_created)
5720 {
5721 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
5722 return FALSE;
5723 }
5724
5725 dynobj = elf_hash_table (info)->dynobj;
5726 local_got_offsets = elf_local_got_offsets (abfd);
5727
5728 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5729 sym_hashes = elf_sym_hashes (abfd);
5730 sym_hashes_end = sym_hashes
5731 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
5732
5733 if (!elf_bad_symtab (abfd))
5734 sym_hashes_end -= symtab_hdr->sh_info;
5735
5736 rel_end = relocs + sec->reloc_count;
5737 for (rel = relocs; rel < rel_end; rel++)
5738 {
5739 struct elf_link_hash_entry *h;
5740 struct elf32_arm_link_hash_entry *eh;
5741 unsigned long r_symndx;
5742 int r_type;
5743
5744 r_symndx = ELF32_R_SYM (rel->r_info);
5745 r_type = ELF32_R_TYPE (rel->r_info);
5746 r_type = arm_real_reloc_type (htab, r_type);
5747
5748 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
5749 {
5750 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
5751 r_symndx);
5752 return FALSE;
5753 }
5754
5755 if (r_symndx < symtab_hdr->sh_info)
5756 h = NULL;
5757 else
5758 {
5759 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5760 while (h->root.type == bfd_link_hash_indirect
5761 || h->root.type == bfd_link_hash_warning)
5762 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5763 }
5764
5765 eh = (struct elf32_arm_link_hash_entry *) h;
5766
5767 switch (r_type)
5768 {
5769 case R_ARM_GOT32:
5770 case R_ARM_GOT_PREL:
5771 case R_ARM_TLS_GD32:
5772 case R_ARM_TLS_IE32:
5773 /* This symbol requires a global offset table entry. */
5774 {
5775 int tls_type, old_tls_type;
5776
5777 switch (r_type)
5778 {
5779 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
5780 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
5781 default: tls_type = GOT_NORMAL; break;
5782 }
5783
5784 if (h != NULL)
5785 {
5786 h->got.refcount++;
5787 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
5788 }
5789 else
5790 {
5791 bfd_signed_vma *local_got_refcounts;
5792
5793 /* This is a global offset table entry for a local symbol. */
5794 local_got_refcounts = elf_local_got_refcounts (abfd);
5795 if (local_got_refcounts == NULL)
5796 {
5797 bfd_size_type size;
5798
5799 size = symtab_hdr->sh_info;
5800 size *= (sizeof (bfd_signed_vma) + sizeof(char));
5801 local_got_refcounts = bfd_zalloc (abfd, size);
5802 if (local_got_refcounts == NULL)
5803 return FALSE;
5804 elf_local_got_refcounts (abfd) = local_got_refcounts;
5805 elf32_arm_local_got_tls_type (abfd)
5806 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
5807 }
5808 local_got_refcounts[r_symndx] += 1;
5809 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
5810 }
5811
5812 /* We will already have issued an error message if there is a
5813 TLS / non-TLS mismatch, based on the symbol type. We don't
5814 support any linker relaxations. So just combine any TLS
5815 types needed. */
5816 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
5817 && tls_type != GOT_NORMAL)
5818 tls_type |= old_tls_type;
5819
5820 if (old_tls_type != tls_type)
5821 {
5822 if (h != NULL)
5823 elf32_arm_hash_entry (h)->tls_type = tls_type;
5824 else
5825 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
5826 }
5827 }
5828 /* Fall through */
5829
5830 case R_ARM_TLS_LDM32:
5831 if (r_type == R_ARM_TLS_LDM32)
5832 htab->tls_ldm_got.refcount++;
5833 /* Fall through */
5834
5835 case R_ARM_GOTOFF32:
5836 case R_ARM_GOTPC:
5837 if (htab->sgot == NULL)
5838 {
5839 if (htab->root.dynobj == NULL)
5840 htab->root.dynobj = abfd;
5841 if (!create_got_section (htab->root.dynobj, info))
5842 return FALSE;
5843 }
5844 break;
5845
5846 case R_ARM_ABS12:
5847 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
5848 ldr __GOTT_INDEX__ offsets. */
5849 if (!htab->vxworks_p)
5850 break;
5851 /* Fall through */
5852
5853 case R_ARM_ABS32:
5854 case R_ARM_REL32:
5855 case R_ARM_PC24:
5856 case R_ARM_PLT32:
5857 case R_ARM_CALL:
5858 case R_ARM_JUMP24:
5859 case R_ARM_PREL31:
5860 case R_ARM_THM_CALL:
5861 /* Should the interworking branches be listed here? */
5862 if (h != NULL)
5863 {
5864 /* If this reloc is in a read-only section, we might
5865 need a copy reloc. We can't check reliably at this
5866 stage whether the section is read-only, as input
5867 sections have not yet been mapped to output sections.
5868 Tentatively set the flag for now, and correct in
5869 adjust_dynamic_symbol. */
5870 if (!info->shared)
5871 h->non_got_ref = 1;
5872
5873 /* We may need a .plt entry if the function this reloc
5874 refers to is in a different object. We can't tell for
5875 sure yet, because something later might force the
5876 symbol local. */
5877 if (r_type == R_ARM_PC24
5878 || r_type == R_ARM_CALL
5879 || r_type == R_ARM_JUMP24
5880 || r_type == R_ARM_PREL31
5881 || r_type == R_ARM_PLT32
5882 || r_type == R_ARM_THM_CALL)
5883 h->needs_plt = 1;
5884
5885 /* If we create a PLT entry, this relocation will reference
5886 it, even if it's an ABS32 relocation. */
5887 h->plt.refcount += 1;
5888
5889 if (r_type == R_ARM_THM_CALL)
5890 eh->plt_thumb_refcount += 1;
5891 }
5892
5893 /* If we are creating a shared library or relocatable executable,
5894 and this is a reloc against a global symbol, or a non PC
5895 relative reloc against a local symbol, then we need to copy
5896 the reloc into the shared library. However, if we are linking
5897 with -Bsymbolic, we do not need to copy a reloc against a
5898 global symbol which is defined in an object we are
5899 including in the link (i.e., DEF_REGULAR is set). At
5900 this point we have not seen all the input files, so it is
5901 possible that DEF_REGULAR is not set now but will be set
5902 later (it is never cleared). We account for that
5903 possibility below by storing information in the
5904 relocs_copied field of the hash table entry. */
5905 if ((info->shared || htab->root.is_relocatable_executable)
5906 && (sec->flags & SEC_ALLOC) != 0
5907 && (r_type == R_ARM_ABS32
5908 || (h != NULL && ! h->needs_plt
5909 && (! info->symbolic || ! h->def_regular))))
5910 {
5911 struct elf32_arm_relocs_copied *p, **head;
5912
5913 /* When creating a shared object, we must copy these
5914 reloc types into the output file. We create a reloc
5915 section in dynobj and make room for this reloc. */
5916 if (sreloc == NULL)
5917 {
5918 const char * name;
5919
5920 name = (bfd_elf_string_from_elf_section
5921 (abfd,
5922 elf_elfheader (abfd)->e_shstrndx,
5923 elf_section_data (sec)->rel_hdr.sh_name));
5924 if (name == NULL)
5925 return FALSE;
5926
5927 BFD_ASSERT (reloc_section_p (htab, name, sec));
5928
5929 sreloc = bfd_get_section_by_name (dynobj, name);
5930 if (sreloc == NULL)
5931 {
5932 flagword flags;
5933
5934 flags = (SEC_HAS_CONTENTS | SEC_READONLY
5935 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5936 if ((sec->flags & SEC_ALLOC) != 0
5937 /* BPABI objects never have dynamic
5938 relocations mapped. */
5939 && !htab->symbian_p)
5940 flags |= SEC_ALLOC | SEC_LOAD;
5941 sreloc = bfd_make_section_with_flags (dynobj,
5942 name,
5943 flags);
5944 if (sreloc == NULL
5945 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
5946 return FALSE;
5947 }
5948
5949 elf_section_data (sec)->sreloc = sreloc;
5950 }
5951
5952 /* If this is a global symbol, we count the number of
5953 relocations we need for this symbol. */
5954 if (h != NULL)
5955 {
5956 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
5957 }
5958 else
5959 {
5960 /* Track dynamic relocs needed for local syms too.
5961 We really need local syms available to do this
5962 easily. Oh well. */
5963
5964 asection *s;
5965 void *vpp;
5966
5967 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
5968 sec, r_symndx);
5969 if (s == NULL)
5970 return FALSE;
5971
5972 vpp = &elf_section_data (s)->local_dynrel;
5973 head = (struct elf32_arm_relocs_copied **) vpp;
5974 }
5975
5976 p = *head;
5977 if (p == NULL || p->section != sec)
5978 {
5979 bfd_size_type amt = sizeof *p;
5980
5981 p = bfd_alloc (htab->root.dynobj, amt);
5982 if (p == NULL)
5983 return FALSE;
5984 p->next = *head;
5985 *head = p;
5986 p->section = sec;
5987 p->count = 0;
5988 p->pc_count = 0;
5989 }
5990
5991 if (r_type == R_ARM_REL32)
5992 p->pc_count += 1;
5993 p->count += 1;
5994 }
5995 break;
5996
5997 /* This relocation describes the C++ object vtable hierarchy.
5998 Reconstruct it for later use during GC. */
5999 case R_ARM_GNU_VTINHERIT:
6000 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
6001 return FALSE;
6002 break;
6003
6004 /* This relocation describes which C++ vtable entries are actually
6005 used. Record for later use during GC. */
6006 case R_ARM_GNU_VTENTRY:
6007 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
6008 return FALSE;
6009 break;
6010 }
6011 }
6012
6013 return TRUE;
6014 }
6015
6016 /* Treat mapping symbols as special target symbols. */
6017
6018 static bfd_boolean
6019 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
6020 {
6021 return bfd_is_arm_mapping_symbol_name (sym->name);
6022 }
6023
6024 /* This is a copy of elf_find_function() from elf.c except that
6025 ARM mapping symbols are ignored when looking for function names
6026 and STT_ARM_TFUNC is considered to a function type. */
6027
6028 static bfd_boolean
6029 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
6030 asection * section,
6031 asymbol ** symbols,
6032 bfd_vma offset,
6033 const char ** filename_ptr,
6034 const char ** functionname_ptr)
6035 {
6036 const char * filename = NULL;
6037 asymbol * func = NULL;
6038 bfd_vma low_func = 0;
6039 asymbol ** p;
6040
6041 for (p = symbols; *p != NULL; p++)
6042 {
6043 elf_symbol_type *q;
6044
6045 q = (elf_symbol_type *) *p;
6046
6047 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6048 {
6049 default:
6050 break;
6051 case STT_FILE:
6052 filename = bfd_asymbol_name (&q->symbol);
6053 break;
6054 case STT_FUNC:
6055 case STT_ARM_TFUNC:
6056 case STT_NOTYPE:
6057 /* Skip $a and $t symbols. */
6058 if ((q->symbol.flags & BSF_LOCAL)
6059 && bfd_is_arm_mapping_symbol_name (q->symbol.name))
6060 continue;
6061 /* Fall through. */
6062 if (bfd_get_section (&q->symbol) == section
6063 && q->symbol.value >= low_func
6064 && q->symbol.value <= offset)
6065 {
6066 func = (asymbol *) q;
6067 low_func = q->symbol.value;
6068 }
6069 break;
6070 }
6071 }
6072
6073 if (func == NULL)
6074 return FALSE;
6075
6076 if (filename_ptr)
6077 *filename_ptr = filename;
6078 if (functionname_ptr)
6079 *functionname_ptr = bfd_asymbol_name (func);
6080
6081 return TRUE;
6082 }
6083
6084
6085 /* Find the nearest line to a particular section and offset, for error
6086 reporting. This code is a duplicate of the code in elf.c, except
6087 that it uses arm_elf_find_function. */
6088
6089 static bfd_boolean
6090 elf32_arm_find_nearest_line (bfd * abfd,
6091 asection * section,
6092 asymbol ** symbols,
6093 bfd_vma offset,
6094 const char ** filename_ptr,
6095 const char ** functionname_ptr,
6096 unsigned int * line_ptr)
6097 {
6098 bfd_boolean found = FALSE;
6099
6100 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
6101
6102 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6103 filename_ptr, functionname_ptr,
6104 line_ptr, 0,
6105 & elf_tdata (abfd)->dwarf2_find_line_info))
6106 {
6107 if (!*functionname_ptr)
6108 arm_elf_find_function (abfd, section, symbols, offset,
6109 *filename_ptr ? NULL : filename_ptr,
6110 functionname_ptr);
6111
6112 return TRUE;
6113 }
6114
6115 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6116 & found, filename_ptr,
6117 functionname_ptr, line_ptr,
6118 & elf_tdata (abfd)->line_info))
6119 return FALSE;
6120
6121 if (found && (*functionname_ptr || *line_ptr))
6122 return TRUE;
6123
6124 if (symbols == NULL)
6125 return FALSE;
6126
6127 if (! arm_elf_find_function (abfd, section, symbols, offset,
6128 filename_ptr, functionname_ptr))
6129 return FALSE;
6130
6131 *line_ptr = 0;
6132 return TRUE;
6133 }
6134
6135 static bfd_boolean
6136 elf32_arm_find_inliner_info (bfd * abfd,
6137 const char ** filename_ptr,
6138 const char ** functionname_ptr,
6139 unsigned int * line_ptr)
6140 {
6141 bfd_boolean found;
6142 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
6143 functionname_ptr, line_ptr,
6144 & elf_tdata (abfd)->dwarf2_find_line_info);
6145 return found;
6146 }
6147
6148 /* Adjust a symbol defined by a dynamic object and referenced by a
6149 regular object. The current definition is in some section of the
6150 dynamic object, but we're not including those sections. We have to
6151 change the definition to something the rest of the link can
6152 understand. */
6153
6154 static bfd_boolean
6155 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
6156 struct elf_link_hash_entry * h)
6157 {
6158 bfd * dynobj;
6159 asection * s;
6160 unsigned int power_of_two;
6161 struct elf32_arm_link_hash_entry * eh;
6162 struct elf32_arm_link_hash_table *globals;
6163
6164 globals = elf32_arm_hash_table (info);
6165 dynobj = elf_hash_table (info)->dynobj;
6166
6167 /* Make sure we know what is going on here. */
6168 BFD_ASSERT (dynobj != NULL
6169 && (h->needs_plt
6170 || h->u.weakdef != NULL
6171 || (h->def_dynamic
6172 && h->ref_regular
6173 && !h->def_regular)));
6174
6175 eh = (struct elf32_arm_link_hash_entry *) h;
6176
6177 /* If this is a function, put it in the procedure linkage table. We
6178 will fill in the contents of the procedure linkage table later,
6179 when we know the address of the .got section. */
6180 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
6181 || h->needs_plt)
6182 {
6183 if (h->plt.refcount <= 0
6184 || SYMBOL_CALLS_LOCAL (info, h)
6185 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6186 && h->root.type == bfd_link_hash_undefweak))
6187 {
6188 /* This case can occur if we saw a PLT32 reloc in an input
6189 file, but the symbol was never referred to by a dynamic
6190 object, or if all references were garbage collected. In
6191 such a case, we don't actually need to build a procedure
6192 linkage table, and we can just do a PC24 reloc instead. */
6193 h->plt.offset = (bfd_vma) -1;
6194 eh->plt_thumb_refcount = 0;
6195 h->needs_plt = 0;
6196 }
6197
6198 return TRUE;
6199 }
6200 else
6201 {
6202 /* It's possible that we incorrectly decided a .plt reloc was
6203 needed for an R_ARM_PC24 or similar reloc to a non-function sym
6204 in check_relocs. We can't decide accurately between function
6205 and non-function syms in check-relocs; Objects loaded later in
6206 the link may change h->type. So fix it now. */
6207 h->plt.offset = (bfd_vma) -1;
6208 eh->plt_thumb_refcount = 0;
6209 }
6210
6211 /* If this is a weak symbol, and there is a real definition, the
6212 processor independent code will have arranged for us to see the
6213 real definition first, and we can just use the same value. */
6214 if (h->u.weakdef != NULL)
6215 {
6216 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6217 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6218 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6219 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6220 return TRUE;
6221 }
6222
6223 /* If there are no non-GOT references, we do not need a copy
6224 relocation. */
6225 if (!h->non_got_ref)
6226 return TRUE;
6227
6228 /* This is a reference to a symbol defined by a dynamic object which
6229 is not a function. */
6230
6231 /* If we are creating a shared library, we must presume that the
6232 only references to the symbol are via the global offset table.
6233 For such cases we need not do anything here; the relocations will
6234 be handled correctly by relocate_section. Relocatable executables
6235 can reference data in shared objects directly, so we don't need to
6236 do anything here. */
6237 if (info->shared || globals->root.is_relocatable_executable)
6238 return TRUE;
6239
6240 if (h->size == 0)
6241 {
6242 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6243 h->root.root.string);
6244 return TRUE;
6245 }
6246
6247 /* We must allocate the symbol in our .dynbss section, which will
6248 become part of the .bss section of the executable. There will be
6249 an entry for this symbol in the .dynsym section. The dynamic
6250 object will contain position independent code, so all references
6251 from the dynamic object to this symbol will go through the global
6252 offset table. The dynamic linker will use the .dynsym entry to
6253 determine the address it must put in the global offset table, so
6254 both the dynamic object and the regular object will refer to the
6255 same memory location for the variable. */
6256 s = bfd_get_section_by_name (dynobj, ".dynbss");
6257 BFD_ASSERT (s != NULL);
6258
6259 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
6260 copy the initial value out of the dynamic object and into the
6261 runtime process image. We need to remember the offset into the
6262 .rel(a).bss section we are going to use. */
6263 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6264 {
6265 asection *srel;
6266
6267 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
6268 BFD_ASSERT (srel != NULL);
6269 srel->size += RELOC_SIZE (globals);
6270 h->needs_copy = 1;
6271 }
6272
6273 /* We need to figure out the alignment required for this symbol. I
6274 have no idea how ELF linkers handle this. */
6275 power_of_two = bfd_log2 (h->size);
6276 if (power_of_two > 3)
6277 power_of_two = 3;
6278
6279 /* Apply the required alignment. */
6280 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
6281 if (power_of_two > bfd_get_section_alignment (dynobj, s))
6282 {
6283 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
6284 return FALSE;
6285 }
6286
6287 /* Define the symbol as being at this point in the section. */
6288 h->root.u.def.section = s;
6289 h->root.u.def.value = s->size;
6290
6291 /* Increment the section size to make room for the symbol. */
6292 s->size += h->size;
6293
6294 return TRUE;
6295 }
6296
6297 /* Allocate space in .plt, .got and associated reloc sections for
6298 dynamic relocs. */
6299
6300 static bfd_boolean
6301 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
6302 {
6303 struct bfd_link_info *info;
6304 struct elf32_arm_link_hash_table *htab;
6305 struct elf32_arm_link_hash_entry *eh;
6306 struct elf32_arm_relocs_copied *p;
6307
6308 eh = (struct elf32_arm_link_hash_entry *) h;
6309
6310 if (h->root.type == bfd_link_hash_indirect)
6311 return TRUE;
6312
6313 if (h->root.type == bfd_link_hash_warning)
6314 /* When warning symbols are created, they **replace** the "real"
6315 entry in the hash table, thus we never get to see the real
6316 symbol in a hash traversal. So look at it now. */
6317 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6318
6319 info = (struct bfd_link_info *) inf;
6320 htab = elf32_arm_hash_table (info);
6321
6322 if (htab->root.dynamic_sections_created
6323 && h->plt.refcount > 0)
6324 {
6325 /* Make sure this symbol is output as a dynamic symbol.
6326 Undefined weak syms won't yet be marked as dynamic. */
6327 if (h->dynindx == -1
6328 && !h->forced_local)
6329 {
6330 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6331 return FALSE;
6332 }
6333
6334 if (info->shared
6335 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
6336 {
6337 asection *s = htab->splt;
6338
6339 /* If this is the first .plt entry, make room for the special
6340 first entry. */
6341 if (s->size == 0)
6342 s->size += htab->plt_header_size;
6343
6344 h->plt.offset = s->size;
6345
6346 /* If we will insert a Thumb trampoline before this PLT, leave room
6347 for it. */
6348 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
6349 {
6350 h->plt.offset += PLT_THUMB_STUB_SIZE;
6351 s->size += PLT_THUMB_STUB_SIZE;
6352 }
6353
6354 /* If this symbol is not defined in a regular file, and we are
6355 not generating a shared library, then set the symbol to this
6356 location in the .plt. This is required to make function
6357 pointers compare as equal between the normal executable and
6358 the shared library. */
6359 if (! info->shared
6360 && !h->def_regular)
6361 {
6362 h->root.u.def.section = s;
6363 h->root.u.def.value = h->plt.offset;
6364
6365 /* Make sure the function is not marked as Thumb, in case
6366 it is the target of an ABS32 relocation, which will
6367 point to the PLT entry. */
6368 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
6369 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
6370 }
6371
6372 /* Make room for this entry. */
6373 s->size += htab->plt_entry_size;
6374
6375 if (!htab->symbian_p)
6376 {
6377 /* We also need to make an entry in the .got.plt section, which
6378 will be placed in the .got section by the linker script. */
6379 eh->plt_got_offset = htab->sgotplt->size;
6380 htab->sgotplt->size += 4;
6381 }
6382
6383 /* We also need to make an entry in the .rel(a).plt section. */
6384 htab->srelplt->size += RELOC_SIZE (htab);
6385
6386 /* VxWorks executables have a second set of relocations for
6387 each PLT entry. They go in a separate relocation section,
6388 which is processed by the kernel loader. */
6389 if (htab->vxworks_p && !info->shared)
6390 {
6391 /* There is a relocation for the initial PLT entry:
6392 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
6393 if (h->plt.offset == htab->plt_header_size)
6394 htab->srelplt2->size += RELOC_SIZE (htab);
6395
6396 /* There are two extra relocations for each subsequent
6397 PLT entry: an R_ARM_32 relocation for the GOT entry,
6398 and an R_ARM_32 relocation for the PLT entry. */
6399 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
6400 }
6401 }
6402 else
6403 {
6404 h->plt.offset = (bfd_vma) -1;
6405 h->needs_plt = 0;
6406 }
6407 }
6408 else
6409 {
6410 h->plt.offset = (bfd_vma) -1;
6411 h->needs_plt = 0;
6412 }
6413
6414 if (h->got.refcount > 0)
6415 {
6416 asection *s;
6417 bfd_boolean dyn;
6418 int tls_type = elf32_arm_hash_entry (h)->tls_type;
6419 int indx;
6420
6421 /* Make sure this symbol is output as a dynamic symbol.
6422 Undefined weak syms won't yet be marked as dynamic. */
6423 if (h->dynindx == -1
6424 && !h->forced_local)
6425 {
6426 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6427 return FALSE;
6428 }
6429
6430 if (!htab->symbian_p)
6431 {
6432 s = htab->sgot;
6433 h->got.offset = s->size;
6434
6435 if (tls_type == GOT_UNKNOWN)
6436 abort ();
6437
6438 if (tls_type == GOT_NORMAL)
6439 /* Non-TLS symbols need one GOT slot. */
6440 s->size += 4;
6441 else
6442 {
6443 if (tls_type & GOT_TLS_GD)
6444 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
6445 s->size += 8;
6446 if (tls_type & GOT_TLS_IE)
6447 /* R_ARM_TLS_IE32 needs one GOT slot. */
6448 s->size += 4;
6449 }
6450
6451 dyn = htab->root.dynamic_sections_created;
6452
6453 indx = 0;
6454 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6455 && (!info->shared
6456 || !SYMBOL_REFERENCES_LOCAL (info, h)))
6457 indx = h->dynindx;
6458
6459 if (tls_type != GOT_NORMAL
6460 && (info->shared || indx != 0)
6461 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6462 || h->root.type != bfd_link_hash_undefweak))
6463 {
6464 if (tls_type & GOT_TLS_IE)
6465 htab->srelgot->size += RELOC_SIZE (htab);
6466
6467 if (tls_type & GOT_TLS_GD)
6468 htab->srelgot->size += RELOC_SIZE (htab);
6469
6470 if ((tls_type & GOT_TLS_GD) && indx != 0)
6471 htab->srelgot->size += RELOC_SIZE (htab);
6472 }
6473 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6474 || h->root.type != bfd_link_hash_undefweak)
6475 && (info->shared
6476 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6477 htab->srelgot->size += RELOC_SIZE (htab);
6478 }
6479 }
6480 else
6481 h->got.offset = (bfd_vma) -1;
6482
6483 if (eh->relocs_copied == NULL)
6484 return TRUE;
6485
6486 /* In the shared -Bsymbolic case, discard space allocated for
6487 dynamic pc-relative relocs against symbols which turn out to be
6488 defined in regular objects. For the normal shared case, discard
6489 space for pc-relative relocs that have become local due to symbol
6490 visibility changes. */
6491
6492 if (info->shared || htab->root.is_relocatable_executable)
6493 {
6494 /* The only reloc that uses pc_count is R_ARM_REL32, which will
6495 appear on something like ".long foo - .". We want calls to
6496 protected symbols to resolve directly to the function rather
6497 than going via the plt. If people want function pointer
6498 comparisons to work as expected then they should avoid
6499 writing assembly like ".long foo - .". */
6500 if (SYMBOL_CALLS_LOCAL (info, h))
6501 {
6502 struct elf32_arm_relocs_copied **pp;
6503
6504 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
6505 {
6506 p->count -= p->pc_count;
6507 p->pc_count = 0;
6508 if (p->count == 0)
6509 *pp = p->next;
6510 else
6511 pp = &p->next;
6512 }
6513 }
6514
6515 /* Also discard relocs on undefined weak syms with non-default
6516 visibility. */
6517 if (eh->relocs_copied != NULL
6518 && h->root.type == bfd_link_hash_undefweak)
6519 {
6520 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6521 eh->relocs_copied = NULL;
6522
6523 /* Make sure undefined weak symbols are output as a dynamic
6524 symbol in PIEs. */
6525 else if (h->dynindx == -1
6526 && !h->forced_local)
6527 {
6528 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6529 return FALSE;
6530 }
6531 }
6532
6533 else if (htab->root.is_relocatable_executable && h->dynindx == -1
6534 && h->root.type == bfd_link_hash_new)
6535 {
6536 /* Output absolute symbols so that we can create relocations
6537 against them. For normal symbols we output a relocation
6538 against the section that contains them. */
6539 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6540 return FALSE;
6541 }
6542
6543 }
6544 else
6545 {
6546 /* For the non-shared case, discard space for relocs against
6547 symbols which turn out to need copy relocs or are not
6548 dynamic. */
6549
6550 if (!h->non_got_ref
6551 && ((h->def_dynamic
6552 && !h->def_regular)
6553 || (htab->root.dynamic_sections_created
6554 && (h->root.type == bfd_link_hash_undefweak
6555 || h->root.type == bfd_link_hash_undefined))))
6556 {
6557 /* Make sure this symbol is output as a dynamic symbol.
6558 Undefined weak syms won't yet be marked as dynamic. */
6559 if (h->dynindx == -1
6560 && !h->forced_local)
6561 {
6562 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6563 return FALSE;
6564 }
6565
6566 /* If that succeeded, we know we'll be keeping all the
6567 relocs. */
6568 if (h->dynindx != -1)
6569 goto keep;
6570 }
6571
6572 eh->relocs_copied = NULL;
6573
6574 keep: ;
6575 }
6576
6577 /* Finally, allocate space. */
6578 for (p = eh->relocs_copied; p != NULL; p = p->next)
6579 {
6580 asection *sreloc = elf_section_data (p->section)->sreloc;
6581 sreloc->size += p->count * RELOC_SIZE (htab);
6582 }
6583
6584 return TRUE;
6585 }
6586
6587 /* Find any dynamic relocs that apply to read-only sections. */
6588
6589 static bfd_boolean
6590 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
6591 {
6592 struct elf32_arm_link_hash_entry *eh;
6593 struct elf32_arm_relocs_copied *p;
6594
6595 if (h->root.type == bfd_link_hash_warning)
6596 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6597
6598 eh = (struct elf32_arm_link_hash_entry *) h;
6599 for (p = eh->relocs_copied; p != NULL; p = p->next)
6600 {
6601 asection *s = p->section;
6602
6603 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6604 {
6605 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6606
6607 info->flags |= DF_TEXTREL;
6608
6609 /* Not an error, just cut short the traversal. */
6610 return FALSE;
6611 }
6612 }
6613 return TRUE;
6614 }
6615
6616 /* Set the sizes of the dynamic sections. */
6617
6618 static bfd_boolean
6619 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
6620 struct bfd_link_info * info)
6621 {
6622 bfd * dynobj;
6623 asection * s;
6624 bfd_boolean plt;
6625 bfd_boolean relocs;
6626 bfd *ibfd;
6627 struct elf32_arm_link_hash_table *htab;
6628
6629 htab = elf32_arm_hash_table (info);
6630 dynobj = elf_hash_table (info)->dynobj;
6631 BFD_ASSERT (dynobj != NULL);
6632 check_use_blx (htab);
6633
6634 if (elf_hash_table (info)->dynamic_sections_created)
6635 {
6636 /* Set the contents of the .interp section to the interpreter. */
6637 if (info->executable)
6638 {
6639 s = bfd_get_section_by_name (dynobj, ".interp");
6640 BFD_ASSERT (s != NULL);
6641 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6642 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6643 }
6644 }
6645
6646 /* Set up .got offsets for local syms, and space for local dynamic
6647 relocs. */
6648 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6649 {
6650 bfd_signed_vma *local_got;
6651 bfd_signed_vma *end_local_got;
6652 char *local_tls_type;
6653 bfd_size_type locsymcount;
6654 Elf_Internal_Shdr *symtab_hdr;
6655 asection *srel;
6656
6657 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
6658 continue;
6659
6660 for (s = ibfd->sections; s != NULL; s = s->next)
6661 {
6662 struct elf32_arm_relocs_copied *p;
6663
6664 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
6665 {
6666 if (!bfd_is_abs_section (p->section)
6667 && bfd_is_abs_section (p->section->output_section))
6668 {
6669 /* Input section has been discarded, either because
6670 it is a copy of a linkonce section or due to
6671 linker script /DISCARD/, so we'll be discarding
6672 the relocs too. */
6673 }
6674 else if (p->count != 0)
6675 {
6676 srel = elf_section_data (p->section)->sreloc;
6677 srel->size += p->count * RELOC_SIZE (htab);
6678 if ((p->section->output_section->flags & SEC_READONLY) != 0)
6679 info->flags |= DF_TEXTREL;
6680 }
6681 }
6682 }
6683
6684 local_got = elf_local_got_refcounts (ibfd);
6685 if (!local_got)
6686 continue;
6687
6688 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6689 locsymcount = symtab_hdr->sh_info;
6690 end_local_got = local_got + locsymcount;
6691 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
6692 s = htab->sgot;
6693 srel = htab->srelgot;
6694 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
6695 {
6696 if (*local_got > 0)
6697 {
6698 *local_got = s->size;
6699 if (*local_tls_type & GOT_TLS_GD)
6700 /* TLS_GD relocs need an 8-byte structure in the GOT. */
6701 s->size += 8;
6702 if (*local_tls_type & GOT_TLS_IE)
6703 s->size += 4;
6704 if (*local_tls_type == GOT_NORMAL)
6705 s->size += 4;
6706
6707 if (info->shared || *local_tls_type == GOT_TLS_GD)
6708 srel->size += RELOC_SIZE (htab);
6709 }
6710 else
6711 *local_got = (bfd_vma) -1;
6712 }
6713 }
6714
6715 if (htab->tls_ldm_got.refcount > 0)
6716 {
6717 /* Allocate two GOT entries and one dynamic relocation (if necessary)
6718 for R_ARM_TLS_LDM32 relocations. */
6719 htab->tls_ldm_got.offset = htab->sgot->size;
6720 htab->sgot->size += 8;
6721 if (info->shared)
6722 htab->srelgot->size += RELOC_SIZE (htab);
6723 }
6724 else
6725 htab->tls_ldm_got.offset = -1;
6726
6727 /* Allocate global sym .plt and .got entries, and space for global
6728 sym dynamic relocs. */
6729 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
6730
6731 /* The check_relocs and adjust_dynamic_symbol entry points have
6732 determined the sizes of the various dynamic sections. Allocate
6733 memory for them. */
6734 plt = FALSE;
6735 relocs = FALSE;
6736 for (s = dynobj->sections; s != NULL; s = s->next)
6737 {
6738 const char * name;
6739
6740 if ((s->flags & SEC_LINKER_CREATED) == 0)
6741 continue;
6742
6743 /* It's OK to base decisions on the section name, because none
6744 of the dynobj section names depend upon the input files. */
6745 name = bfd_get_section_name (dynobj, s);
6746
6747 if (strcmp (name, ".plt") == 0)
6748 {
6749 /* Remember whether there is a PLT. */
6750 plt = s->size != 0;
6751 }
6752 else if (strncmp (name, ".rel", 4) == 0)
6753 {
6754 if (s->size != 0)
6755 {
6756 /* Remember whether there are any reloc sections other
6757 than .rel(a).plt and .rela.plt.unloaded. */
6758 if (s != htab->srelplt && s != htab->srelplt2)
6759 relocs = TRUE;
6760
6761 /* We use the reloc_count field as a counter if we need
6762 to copy relocs into the output file. */
6763 s->reloc_count = 0;
6764 }
6765 }
6766 else if (strncmp (name, ".got", 4) != 0
6767 && strcmp (name, ".dynbss") != 0)
6768 {
6769 /* It's not one of our sections, so don't allocate space. */
6770 continue;
6771 }
6772
6773 if (s->size == 0)
6774 {
6775 /* If we don't need this section, strip it from the
6776 output file. This is mostly to handle .rel(a).bss and
6777 .rel(a).plt. We must create both sections in
6778 create_dynamic_sections, because they must be created
6779 before the linker maps input sections to output
6780 sections. The linker does that before
6781 adjust_dynamic_symbol is called, and it is that
6782 function which decides whether anything needs to go
6783 into these sections. */
6784 s->flags |= SEC_EXCLUDE;
6785 continue;
6786 }
6787
6788 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6789 continue;
6790
6791 /* Allocate memory for the section contents. */
6792 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
6793 if (s->contents == NULL)
6794 return FALSE;
6795 }
6796
6797 if (elf_hash_table (info)->dynamic_sections_created)
6798 {
6799 /* Add some entries to the .dynamic section. We fill in the
6800 values later, in elf32_arm_finish_dynamic_sections, but we
6801 must add the entries now so that we get the correct size for
6802 the .dynamic section. The DT_DEBUG entry is filled in by the
6803 dynamic linker and used by the debugger. */
6804 #define add_dynamic_entry(TAG, VAL) \
6805 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6806
6807 if (info->executable)
6808 {
6809 if (!add_dynamic_entry (DT_DEBUG, 0))
6810 return FALSE;
6811 }
6812
6813 if (plt)
6814 {
6815 if ( !add_dynamic_entry (DT_PLTGOT, 0)
6816 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6817 || !add_dynamic_entry (DT_PLTREL,
6818 htab->use_rel ? DT_REL : DT_RELA)
6819 || !add_dynamic_entry (DT_JMPREL, 0))
6820 return FALSE;
6821 }
6822
6823 if (relocs)
6824 {
6825 if (htab->use_rel)
6826 {
6827 if (!add_dynamic_entry (DT_REL, 0)
6828 || !add_dynamic_entry (DT_RELSZ, 0)
6829 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
6830 return FALSE;
6831 }
6832 else
6833 {
6834 if (!add_dynamic_entry (DT_RELA, 0)
6835 || !add_dynamic_entry (DT_RELASZ, 0)
6836 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
6837 return FALSE;
6838 }
6839 }
6840
6841 /* If any dynamic relocs apply to a read-only section,
6842 then we need a DT_TEXTREL entry. */
6843 if ((info->flags & DF_TEXTREL) == 0)
6844 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
6845 (PTR) info);
6846
6847 if ((info->flags & DF_TEXTREL) != 0)
6848 {
6849 if (!add_dynamic_entry (DT_TEXTREL, 0))
6850 return FALSE;
6851 }
6852 }
6853 #undef add_dynamic_entry
6854
6855 return TRUE;
6856 }
6857
6858 /* Finish up dynamic symbol handling. We set the contents of various
6859 dynamic sections here. */
6860
6861 static bfd_boolean
6862 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
6863 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
6864 {
6865 bfd * dynobj;
6866 struct elf32_arm_link_hash_table *htab;
6867 struct elf32_arm_link_hash_entry *eh;
6868
6869 dynobj = elf_hash_table (info)->dynobj;
6870 htab = elf32_arm_hash_table (info);
6871 eh = (struct elf32_arm_link_hash_entry *) h;
6872
6873 if (h->plt.offset != (bfd_vma) -1)
6874 {
6875 asection * splt;
6876 asection * srel;
6877 bfd_byte *loc;
6878 bfd_vma plt_index;
6879 Elf_Internal_Rela rel;
6880
6881 /* This symbol has an entry in the procedure linkage table. Set
6882 it up. */
6883
6884 BFD_ASSERT (h->dynindx != -1);
6885
6886 splt = bfd_get_section_by_name (dynobj, ".plt");
6887 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
6888 BFD_ASSERT (splt != NULL && srel != NULL);
6889
6890 /* Fill in the entry in the procedure linkage table. */
6891 if (htab->symbian_p)
6892 {
6893 unsigned i;
6894 for (i = 0; i < htab->plt_entry_size / 4; ++i)
6895 bfd_put_32 (output_bfd,
6896 elf32_arm_symbian_plt_entry[i],
6897 splt->contents + h->plt.offset + 4 * i);
6898
6899 /* Fill in the entry in the .rel.plt section. */
6900 rel.r_offset = (splt->output_section->vma
6901 + splt->output_offset
6902 + h->plt.offset + 4 * (i - 1));
6903 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
6904
6905 /* Get the index in the procedure linkage table which
6906 corresponds to this symbol. This is the index of this symbol
6907 in all the symbols for which we are making plt entries. The
6908 first entry in the procedure linkage table is reserved. */
6909 plt_index = ((h->plt.offset - htab->plt_header_size)
6910 / htab->plt_entry_size);
6911 }
6912 else
6913 {
6914 bfd_vma got_offset, got_address, plt_address;
6915 bfd_vma got_displacement;
6916 asection * sgot;
6917
6918 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
6919 BFD_ASSERT (sgot != NULL);
6920
6921 /* Get the offset into the .got.plt table of the entry that
6922 corresponds to this function. */
6923 got_offset = eh->plt_got_offset;
6924
6925 /* Get the index in the procedure linkage table which
6926 corresponds to this symbol. This is the index of this symbol
6927 in all the symbols for which we are making plt entries. The
6928 first three entries in .got.plt are reserved; after that
6929 symbols appear in the same order as in .plt. */
6930 plt_index = (got_offset - 12) / 4;
6931
6932 /* Calculate the address of the GOT entry. */
6933 got_address = (sgot->output_section->vma
6934 + sgot->output_offset
6935 + got_offset);
6936
6937 /* ...and the address of the PLT entry. */
6938 plt_address = (splt->output_section->vma
6939 + splt->output_offset
6940 + h->plt.offset);
6941
6942 if (htab->vxworks_p && info->shared)
6943 {
6944 unsigned int i;
6945 bfd_vma val;
6946
6947 for (i = 0; i != htab->plt_entry_size / 4; i++)
6948 {
6949 val = elf32_arm_vxworks_shared_plt_entry[i];
6950 if (i == 2)
6951 val |= got_address - sgot->output_section->vma;
6952 if (i == 5)
6953 val |= plt_index * RELOC_SIZE (htab);
6954 bfd_put_32 (output_bfd, val,
6955 htab->splt->contents + h->plt.offset + i * 4);
6956 }
6957 }
6958 else if (htab->vxworks_p)
6959 {
6960 unsigned int i;
6961 bfd_vma val;
6962
6963 for (i = 0; i != htab->plt_entry_size / 4; i++)
6964 {
6965 val = elf32_arm_vxworks_exec_plt_entry[i];
6966 if (i == 2)
6967 val |= got_address;
6968 if (i == 4)
6969 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
6970 if (i == 5)
6971 val |= plt_index * RELOC_SIZE (htab);
6972 bfd_put_32 (output_bfd, val,
6973 htab->splt->contents + h->plt.offset + i * 4);
6974 }
6975
6976 loc = (htab->srelplt2->contents
6977 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
6978
6979 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
6980 referencing the GOT for this PLT entry. */
6981 rel.r_offset = plt_address + 8;
6982 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
6983 rel.r_addend = got_offset;
6984 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
6985 loc += RELOC_SIZE (htab);
6986
6987 /* Create the R_ARM_ABS32 relocation referencing the
6988 beginning of the PLT for this GOT entry. */
6989 rel.r_offset = got_address;
6990 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
6991 rel.r_addend = 0;
6992 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
6993 }
6994 else
6995 {
6996 /* Calculate the displacement between the PLT slot and the
6997 entry in the GOT. The eight-byte offset accounts for the
6998 value produced by adding to pc in the first instruction
6999 of the PLT stub. */
7000 got_displacement = got_address - (plt_address + 8);
7001
7002 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
7003
7004 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
7005 {
7006 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
7007 splt->contents + h->plt.offset - 4);
7008 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
7009 splt->contents + h->plt.offset - 2);
7010 }
7011
7012 bfd_put_32 (output_bfd,
7013 elf32_arm_plt_entry[0]
7014 | ((got_displacement & 0x0ff00000) >> 20),
7015 splt->contents + h->plt.offset + 0);
7016 bfd_put_32 (output_bfd,
7017 elf32_arm_plt_entry[1]
7018 | ((got_displacement & 0x000ff000) >> 12),
7019 splt->contents + h->plt.offset + 4);
7020 bfd_put_32 (output_bfd,
7021 elf32_arm_plt_entry[2]
7022 | (got_displacement & 0x00000fff),
7023 splt->contents + h->plt.offset + 8);
7024 #ifdef FOUR_WORD_PLT
7025 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
7026 splt->contents + h->plt.offset + 12);
7027 #endif
7028 }
7029
7030 /* Fill in the entry in the global offset table. */
7031 bfd_put_32 (output_bfd,
7032 (splt->output_section->vma
7033 + splt->output_offset),
7034 sgot->contents + got_offset);
7035
7036 /* Fill in the entry in the .rel(a).plt section. */
7037 rel.r_addend = 0;
7038 rel.r_offset = got_address;
7039 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
7040 }
7041
7042 loc = srel->contents + plt_index * RELOC_SIZE (htab);
7043 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7044
7045 if (!h->def_regular)
7046 {
7047 /* Mark the symbol as undefined, rather than as defined in
7048 the .plt section. Leave the value alone. */
7049 sym->st_shndx = SHN_UNDEF;
7050 /* If the symbol is weak, we do need to clear the value.
7051 Otherwise, the PLT entry would provide a definition for
7052 the symbol even if the symbol wasn't defined anywhere,
7053 and so the symbol would never be NULL. */
7054 if (!h->ref_regular_nonweak)
7055 sym->st_value = 0;
7056 }
7057 }
7058
7059 if (h->got.offset != (bfd_vma) -1
7060 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
7061 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
7062 {
7063 asection * sgot;
7064 asection * srel;
7065 Elf_Internal_Rela rel;
7066 bfd_byte *loc;
7067 bfd_vma offset;
7068
7069 /* This symbol has an entry in the global offset table. Set it
7070 up. */
7071 sgot = bfd_get_section_by_name (dynobj, ".got");
7072 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
7073 BFD_ASSERT (sgot != NULL && srel != NULL);
7074
7075 offset = (h->got.offset & ~(bfd_vma) 1);
7076 rel.r_addend = 0;
7077 rel.r_offset = (sgot->output_section->vma
7078 + sgot->output_offset
7079 + offset);
7080
7081 /* If this is a static link, or it is a -Bsymbolic link and the
7082 symbol is defined locally or was forced to be local because
7083 of a version file, we just want to emit a RELATIVE reloc.
7084 The entry in the global offset table will already have been
7085 initialized in the relocate_section function. */
7086 if (info->shared
7087 && SYMBOL_REFERENCES_LOCAL (info, h))
7088 {
7089 BFD_ASSERT((h->got.offset & 1) != 0);
7090 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
7091 if (!htab->use_rel)
7092 {
7093 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
7094 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
7095 }
7096 }
7097 else
7098 {
7099 BFD_ASSERT((h->got.offset & 1) == 0);
7100 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
7101 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
7102 }
7103
7104 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
7105 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7106 }
7107
7108 if (h->needs_copy)
7109 {
7110 asection * s;
7111 Elf_Internal_Rela rel;
7112 bfd_byte *loc;
7113
7114 /* This symbol needs a copy reloc. Set it up. */
7115 BFD_ASSERT (h->dynindx != -1
7116 && (h->root.type == bfd_link_hash_defined
7117 || h->root.type == bfd_link_hash_defweak));
7118
7119 s = bfd_get_section_by_name (h->root.u.def.section->owner,
7120 RELOC_SECTION (htab, ".bss"));
7121 BFD_ASSERT (s != NULL);
7122
7123 rel.r_addend = 0;
7124 rel.r_offset = (h->root.u.def.value
7125 + h->root.u.def.section->output_section->vma
7126 + h->root.u.def.section->output_offset);
7127 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
7128 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
7129 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7130 }
7131
7132 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
7133 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
7134 to the ".got" section. */
7135 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7136 || (!htab->vxworks_p && h == htab->root.hgot))
7137 sym->st_shndx = SHN_ABS;
7138
7139 return TRUE;
7140 }
7141
7142 /* Finish up the dynamic sections. */
7143
7144 static bfd_boolean
7145 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
7146 {
7147 bfd * dynobj;
7148 asection * sgot;
7149 asection * sdyn;
7150
7151 dynobj = elf_hash_table (info)->dynobj;
7152
7153 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
7154 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
7155 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7156
7157 if (elf_hash_table (info)->dynamic_sections_created)
7158 {
7159 asection *splt;
7160 Elf32_External_Dyn *dyncon, *dynconend;
7161 struct elf32_arm_link_hash_table *htab;
7162
7163 htab = elf32_arm_hash_table (info);
7164 splt = bfd_get_section_by_name (dynobj, ".plt");
7165 BFD_ASSERT (splt != NULL && sdyn != NULL);
7166
7167 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7168 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7169
7170 for (; dyncon < dynconend; dyncon++)
7171 {
7172 Elf_Internal_Dyn dyn;
7173 const char * name;
7174 asection * s;
7175
7176 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7177
7178 switch (dyn.d_tag)
7179 {
7180 unsigned int type;
7181
7182 default:
7183 break;
7184
7185 case DT_HASH:
7186 name = ".hash";
7187 goto get_vma_if_bpabi;
7188 case DT_STRTAB:
7189 name = ".dynstr";
7190 goto get_vma_if_bpabi;
7191 case DT_SYMTAB:
7192 name = ".dynsym";
7193 goto get_vma_if_bpabi;
7194 case DT_VERSYM:
7195 name = ".gnu.version";
7196 goto get_vma_if_bpabi;
7197 case DT_VERDEF:
7198 name = ".gnu.version_d";
7199 goto get_vma_if_bpabi;
7200 case DT_VERNEED:
7201 name = ".gnu.version_r";
7202 goto get_vma_if_bpabi;
7203
7204 case DT_PLTGOT:
7205 name = ".got";
7206 goto get_vma;
7207 case DT_JMPREL:
7208 name = RELOC_SECTION (htab, ".plt");
7209 get_vma:
7210 s = bfd_get_section_by_name (output_bfd, name);
7211 BFD_ASSERT (s != NULL);
7212 if (!htab->symbian_p)
7213 dyn.d_un.d_ptr = s->vma;
7214 else
7215 /* In the BPABI, tags in the PT_DYNAMIC section point
7216 at the file offset, not the memory address, for the
7217 convenience of the post linker. */
7218 dyn.d_un.d_ptr = s->filepos;
7219 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7220 break;
7221
7222 get_vma_if_bpabi:
7223 if (htab->symbian_p)
7224 goto get_vma;
7225 break;
7226
7227 case DT_PLTRELSZ:
7228 s = bfd_get_section_by_name (output_bfd,
7229 RELOC_SECTION (htab, ".plt"));
7230 BFD_ASSERT (s != NULL);
7231 dyn.d_un.d_val = s->size;
7232 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7233 break;
7234
7235 case DT_RELSZ:
7236 case DT_RELASZ:
7237 if (!htab->symbian_p)
7238 {
7239 /* My reading of the SVR4 ABI indicates that the
7240 procedure linkage table relocs (DT_JMPREL) should be
7241 included in the overall relocs (DT_REL). This is
7242 what Solaris does. However, UnixWare can not handle
7243 that case. Therefore, we override the DT_RELSZ entry
7244 here to make it not include the JMPREL relocs. Since
7245 the linker script arranges for .rel(a).plt to follow all
7246 other relocation sections, we don't have to worry
7247 about changing the DT_REL entry. */
7248 s = bfd_get_section_by_name (output_bfd,
7249 RELOC_SECTION (htab, ".plt"));
7250 if (s != NULL)
7251 dyn.d_un.d_val -= s->size;
7252 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7253 break;
7254 }
7255 /* Fall through */
7256
7257 case DT_REL:
7258 case DT_RELA:
7259 /* In the BPABI, the DT_REL tag must point at the file
7260 offset, not the VMA, of the first relocation
7261 section. So, we use code similar to that in
7262 elflink.c, but do not check for SHF_ALLOC on the
7263 relcoation section, since relocations sections are
7264 never allocated under the BPABI. The comments above
7265 about Unixware notwithstanding, we include all of the
7266 relocations here. */
7267 if (htab->symbian_p)
7268 {
7269 unsigned int i;
7270 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
7271 ? SHT_REL : SHT_RELA);
7272 dyn.d_un.d_val = 0;
7273 for (i = 1; i < elf_numsections (output_bfd); i++)
7274 {
7275 Elf_Internal_Shdr *hdr
7276 = elf_elfsections (output_bfd)[i];
7277 if (hdr->sh_type == type)
7278 {
7279 if (dyn.d_tag == DT_RELSZ
7280 || dyn.d_tag == DT_RELASZ)
7281 dyn.d_un.d_val += hdr->sh_size;
7282 else if ((ufile_ptr) hdr->sh_offset
7283 <= dyn.d_un.d_val - 1)
7284 dyn.d_un.d_val = hdr->sh_offset;
7285 }
7286 }
7287 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7288 }
7289 break;
7290
7291 /* Set the bottom bit of DT_INIT/FINI if the
7292 corresponding function is Thumb. */
7293 case DT_INIT:
7294 name = info->init_function;
7295 goto get_sym;
7296 case DT_FINI:
7297 name = info->fini_function;
7298 get_sym:
7299 /* If it wasn't set by elf_bfd_final_link
7300 then there is nothing to adjust. */
7301 if (dyn.d_un.d_val != 0)
7302 {
7303 struct elf_link_hash_entry * eh;
7304
7305 eh = elf_link_hash_lookup (elf_hash_table (info), name,
7306 FALSE, FALSE, TRUE);
7307 if (eh != (struct elf_link_hash_entry *) NULL
7308 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
7309 {
7310 dyn.d_un.d_val |= 1;
7311 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7312 }
7313 }
7314 break;
7315 }
7316 }
7317
7318 /* Fill in the first entry in the procedure linkage table. */
7319 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
7320 {
7321 const bfd_vma *plt0_entry;
7322 bfd_vma got_address, plt_address, got_displacement;
7323
7324 /* Calculate the addresses of the GOT and PLT. */
7325 got_address = sgot->output_section->vma + sgot->output_offset;
7326 plt_address = splt->output_section->vma + splt->output_offset;
7327
7328 if (htab->vxworks_p)
7329 {
7330 /* The VxWorks GOT is relocated by the dynamic linker.
7331 Therefore, we must emit relocations rather than simply
7332 computing the values now. */
7333 Elf_Internal_Rela rel;
7334
7335 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
7336 bfd_put_32 (output_bfd, plt0_entry[0], splt->contents + 0);
7337 bfd_put_32 (output_bfd, plt0_entry[1], splt->contents + 4);
7338 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
7339 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
7340
7341 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
7342 rel.r_offset = plt_address + 12;
7343 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
7344 rel.r_addend = 0;
7345 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
7346 htab->srelplt2->contents);
7347 }
7348 else
7349 {
7350 got_displacement = got_address - (plt_address + 16);
7351
7352 plt0_entry = elf32_arm_plt0_entry;
7353 bfd_put_32 (output_bfd, plt0_entry[0], splt->contents + 0);
7354 bfd_put_32 (output_bfd, plt0_entry[1], splt->contents + 4);
7355 bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8);
7356 bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12);
7357
7358 #ifdef FOUR_WORD_PLT
7359 /* The displacement value goes in the otherwise-unused
7360 last word of the second entry. */
7361 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
7362 #else
7363 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
7364 #endif
7365 }
7366 }
7367
7368 /* UnixWare sets the entsize of .plt to 4, although that doesn't
7369 really seem like the right value. */
7370 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
7371
7372 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
7373 {
7374 /* Correct the .rel(a).plt.unloaded relocations. They will have
7375 incorrect symbol indexes. */
7376 int num_plts;
7377 unsigned char *p;
7378
7379 num_plts = ((htab->splt->size - htab->plt_header_size)
7380 / htab->plt_entry_size);
7381 p = htab->srelplt2->contents + RELOC_SIZE (htab);
7382
7383 for (; num_plts; num_plts--)
7384 {
7385 Elf_Internal_Rela rel;
7386
7387 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
7388 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
7389 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
7390 p += RELOC_SIZE (htab);
7391
7392 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
7393 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
7394 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
7395 p += RELOC_SIZE (htab);
7396 }
7397 }
7398 }
7399
7400 /* Fill in the first three entries in the global offset table. */
7401 if (sgot)
7402 {
7403 if (sgot->size > 0)
7404 {
7405 if (sdyn == NULL)
7406 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
7407 else
7408 bfd_put_32 (output_bfd,
7409 sdyn->output_section->vma + sdyn->output_offset,
7410 sgot->contents);
7411 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
7412 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
7413 }
7414
7415 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
7416 }
7417
7418 return TRUE;
7419 }
7420
7421 static void
7422 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
7423 {
7424 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
7425 struct elf32_arm_link_hash_table *globals;
7426
7427 i_ehdrp = elf_elfheader (abfd);
7428
7429 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
7430 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
7431 else
7432 i_ehdrp->e_ident[EI_OSABI] = 0;
7433 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
7434
7435 if (link_info)
7436 {
7437 globals = elf32_arm_hash_table (link_info);
7438 if (globals->byteswap_code)
7439 i_ehdrp->e_flags |= EF_ARM_BE8;
7440 }
7441 }
7442
7443 static enum elf_reloc_type_class
7444 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
7445 {
7446 switch ((int) ELF32_R_TYPE (rela->r_info))
7447 {
7448 case R_ARM_RELATIVE:
7449 return reloc_class_relative;
7450 case R_ARM_JUMP_SLOT:
7451 return reloc_class_plt;
7452 case R_ARM_COPY:
7453 return reloc_class_copy;
7454 default:
7455 return reloc_class_normal;
7456 }
7457 }
7458
7459 /* Set the right machine number for an Arm ELF file. */
7460
7461 static bfd_boolean
7462 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
7463 {
7464 if (hdr->sh_type == SHT_NOTE)
7465 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
7466
7467 return TRUE;
7468 }
7469
7470 static void
7471 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
7472 {
7473 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
7474 }
7475
7476 /* Return TRUE if this is an unwinding table entry. */
7477
7478 static bfd_boolean
7479 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
7480 {
7481 size_t len1, len2;
7482
7483 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
7484 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
7485 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
7486 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
7487 }
7488
7489
7490 /* Set the type and flags for an ARM section. We do this by
7491 the section name, which is a hack, but ought to work. */
7492
7493 static bfd_boolean
7494 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
7495 {
7496 const char * name;
7497
7498 name = bfd_get_section_name (abfd, sec);
7499
7500 if (is_arm_elf_unwind_section_name (abfd, name))
7501 {
7502 hdr->sh_type = SHT_ARM_EXIDX;
7503 hdr->sh_flags |= SHF_LINK_ORDER;
7504 }
7505 else if (strcmp(name, ".ARM.attributes") == 0)
7506 {
7507 hdr->sh_type = SHT_ARM_ATTRIBUTES;
7508 }
7509 return TRUE;
7510 }
7511
7512 /* Parse an Arm EABI attributes section. */
7513 static void
7514 elf32_arm_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr)
7515 {
7516 bfd_byte *contents;
7517 bfd_byte *p;
7518 bfd_vma len;
7519
7520 contents = bfd_malloc (hdr->sh_size);
7521 if (!contents)
7522 return;
7523 if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
7524 hdr->sh_size))
7525 {
7526 free (contents);
7527 return;
7528 }
7529 p = contents;
7530 if (*(p++) == 'A')
7531 {
7532 len = hdr->sh_size - 1;
7533 while (len > 0)
7534 {
7535 int namelen;
7536 bfd_vma section_len;
7537
7538 section_len = bfd_get_32 (abfd, p);
7539 p += 4;
7540 if (section_len > len)
7541 section_len = len;
7542 len -= section_len;
7543 namelen = strlen ((char *)p) + 1;
7544 section_len -= namelen + 4;
7545 if (strcmp((char *)p, "aeabi") != 0)
7546 {
7547 /* Vendor section. Ignore it. */
7548 p += namelen + section_len;
7549 }
7550 else
7551 {
7552 p += namelen;
7553 while (section_len > 0)
7554 {
7555 int tag;
7556 unsigned int n;
7557 unsigned int val;
7558 bfd_vma subsection_len;
7559 bfd_byte *end;
7560
7561 tag = read_unsigned_leb128 (abfd, p, &n);
7562 p += n;
7563 subsection_len = bfd_get_32 (abfd, p);
7564 p += 4;
7565 if (subsection_len > section_len)
7566 subsection_len = section_len;
7567 section_len -= subsection_len;
7568 subsection_len -= n + 4;
7569 end = p + subsection_len;
7570 switch (tag)
7571 {
7572 case Tag_File:
7573 while (p < end)
7574 {
7575 bfd_boolean is_string;
7576
7577 tag = read_unsigned_leb128 (abfd, p, &n);
7578 p += n;
7579 if (tag == 4 || tag == 5)
7580 is_string = 1;
7581 else if (tag < 32)
7582 is_string = 0;
7583 else
7584 is_string = (tag & 1) != 0;
7585 if (tag == Tag_compatibility)
7586 {
7587 val = read_unsigned_leb128 (abfd, p, &n);
7588 p += n;
7589 elf32_arm_add_eabi_attr_compat (abfd, val,
7590 (char *)p);
7591 p += strlen ((char *)p) + 1;
7592 }
7593 else if (is_string)
7594 {
7595 elf32_arm_add_eabi_attr_string (abfd, tag,
7596 (char *)p);
7597 p += strlen ((char *)p) + 1;
7598 }
7599 else
7600 {
7601 val = read_unsigned_leb128 (abfd, p, &n);
7602 p += n;
7603 elf32_arm_add_eabi_attr_int (abfd, tag, val);
7604 }
7605 }
7606 break;
7607 case Tag_Section:
7608 case Tag_Symbol:
7609 /* Don't have anywhere convenient to attach these.
7610 Fall through for now. */
7611 default:
7612 /* Ignore things we don't kow about. */
7613 p += subsection_len;
7614 subsection_len = 0;
7615 break;
7616 }
7617 }
7618 }
7619 }
7620 }
7621 free (contents);
7622 }
7623
7624 /* Handle an ARM specific section when reading an object file. This is
7625 called when bfd_section_from_shdr finds a section with an unknown
7626 type. */
7627
7628 static bfd_boolean
7629 elf32_arm_section_from_shdr (bfd *abfd,
7630 Elf_Internal_Shdr * hdr,
7631 const char *name,
7632 int shindex)
7633 {
7634 /* There ought to be a place to keep ELF backend specific flags, but
7635 at the moment there isn't one. We just keep track of the
7636 sections by their name, instead. Fortunately, the ABI gives
7637 names for all the ARM specific sections, so we will probably get
7638 away with this. */
7639 switch (hdr->sh_type)
7640 {
7641 case SHT_ARM_EXIDX:
7642 case SHT_ARM_PREEMPTMAP:
7643 case SHT_ARM_ATTRIBUTES:
7644 break;
7645
7646 default:
7647 return FALSE;
7648 }
7649
7650 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7651 return FALSE;
7652
7653 if (hdr->sh_type == SHT_ARM_ATTRIBUTES)
7654 elf32_arm_parse_attributes(abfd, hdr);
7655 return TRUE;
7656 }
7657
7658 /* A structure used to record a list of sections, independently
7659 of the next and prev fields in the asection structure. */
7660 typedef struct section_list
7661 {
7662 asection * sec;
7663 struct section_list * next;
7664 struct section_list * prev;
7665 }
7666 section_list;
7667
7668 /* Unfortunately we need to keep a list of sections for which
7669 an _arm_elf_section_data structure has been allocated. This
7670 is because it is possible for functions like elf32_arm_write_section
7671 to be called on a section which has had an elf_data_structure
7672 allocated for it (and so the used_by_bfd field is valid) but
7673 for which the ARM extended version of this structure - the
7674 _arm_elf_section_data structure - has not been allocated. */
7675 static section_list * sections_with_arm_elf_section_data = NULL;
7676
7677 static void
7678 record_section_with_arm_elf_section_data (asection * sec)
7679 {
7680 struct section_list * entry;
7681
7682 entry = bfd_malloc (sizeof (* entry));
7683 if (entry == NULL)
7684 return;
7685 entry->sec = sec;
7686 entry->next = sections_with_arm_elf_section_data;
7687 entry->prev = NULL;
7688 if (entry->next != NULL)
7689 entry->next->prev = entry;
7690 sections_with_arm_elf_section_data = entry;
7691 }
7692
7693 static struct section_list *
7694 find_arm_elf_section_entry (asection * sec)
7695 {
7696 struct section_list * entry;
7697 static struct section_list * last_entry = NULL;
7698
7699 /* This is a short cut for the typical case where the sections are added
7700 to the sections_with_arm_elf_section_data list in forward order and
7701 then looked up here in backwards order. This makes a real difference
7702 to the ld-srec/sec64k.exp linker test. */
7703 entry = sections_with_arm_elf_section_data;
7704 if (last_entry != NULL)
7705 {
7706 if (last_entry->sec == sec)
7707 entry = last_entry;
7708 else if (last_entry->next != NULL
7709 && last_entry->next->sec == sec)
7710 entry = last_entry->next;
7711 }
7712
7713 for (; entry; entry = entry->next)
7714 if (entry->sec == sec)
7715 break;
7716
7717 if (entry)
7718 /* Record the entry prior to this one - it is the entry we are most
7719 likely to want to locate next time. Also this way if we have been
7720 called from unrecord_section_with_arm_elf_section_data() we will not
7721 be caching a pointer that is about to be freed. */
7722 last_entry = entry->prev;
7723
7724 return entry;
7725 }
7726
7727 static _arm_elf_section_data *
7728 get_arm_elf_section_data (asection * sec)
7729 {
7730 struct section_list * entry;
7731
7732 entry = find_arm_elf_section_entry (sec);
7733
7734 if (entry)
7735 return elf32_arm_section_data (entry->sec);
7736 else
7737 return NULL;
7738 }
7739
7740 static void
7741 unrecord_section_with_arm_elf_section_data (asection * sec)
7742 {
7743 struct section_list * entry;
7744
7745 entry = find_arm_elf_section_entry (sec);
7746
7747 if (entry)
7748 {
7749 if (entry->prev != NULL)
7750 entry->prev->next = entry->next;
7751 if (entry->next != NULL)
7752 entry->next->prev = entry->prev;
7753 if (entry == sections_with_arm_elf_section_data)
7754 sections_with_arm_elf_section_data = entry->next;
7755 free (entry);
7756 }
7757 }
7758
7759 /* Called for each symbol. Builds a section map based on mapping symbols.
7760 Does not alter any of the symbols. */
7761
7762 static bfd_boolean
7763 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
7764 const char *name,
7765 Elf_Internal_Sym *elfsym,
7766 asection *input_sec,
7767 struct elf_link_hash_entry *h)
7768 {
7769 int mapcount;
7770 elf32_arm_section_map *map;
7771 elf32_arm_section_map *newmap;
7772 _arm_elf_section_data *arm_data;
7773 struct elf32_arm_link_hash_table *globals;
7774
7775 globals = elf32_arm_hash_table (info);
7776 if (globals->vxworks_p
7777 && !elf_vxworks_link_output_symbol_hook (info, name, elfsym,
7778 input_sec, h))
7779 return FALSE;
7780
7781 /* Only do this on final link. */
7782 if (info->relocatable)
7783 return TRUE;
7784
7785 /* Only build a map if we need to byteswap code. */
7786 if (!globals->byteswap_code)
7787 return TRUE;
7788
7789 /* We only want mapping symbols. */
7790 if (! bfd_is_arm_mapping_symbol_name (name))
7791 return TRUE;
7792
7793 /* If this section has not been allocated an _arm_elf_section_data
7794 structure then we cannot record anything. */
7795 arm_data = get_arm_elf_section_data (input_sec);
7796 if (arm_data == NULL)
7797 return TRUE;
7798
7799 mapcount = arm_data->mapcount + 1;
7800 map = arm_data->map;
7801
7802 /* TODO: This may be inefficient, but we probably don't usually have many
7803 mapping symbols per section. */
7804 newmap = bfd_realloc (map, mapcount * sizeof (* map));
7805 if (newmap != NULL)
7806 {
7807 arm_data->map = newmap;
7808 arm_data->mapcount = mapcount;
7809
7810 newmap[mapcount - 1].vma = elfsym->st_value;
7811 newmap[mapcount - 1].type = name[1];
7812 }
7813
7814 return TRUE;
7815 }
7816
7817 /* Allocate target specific section data. */
7818
7819 static bfd_boolean
7820 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
7821 {
7822 _arm_elf_section_data *sdata;
7823 bfd_size_type amt = sizeof (*sdata);
7824
7825 sdata = bfd_zalloc (abfd, amt);
7826 if (sdata == NULL)
7827 return FALSE;
7828 sec->used_by_bfd = sdata;
7829
7830 record_section_with_arm_elf_section_data (sec);
7831
7832 return _bfd_elf_new_section_hook (abfd, sec);
7833 }
7834
7835
7836 /* Used to order a list of mapping symbols by address. */
7837
7838 static int
7839 elf32_arm_compare_mapping (const void * a, const void * b)
7840 {
7841 return ((const elf32_arm_section_map *) a)->vma
7842 > ((const elf32_arm_section_map *) b)->vma;
7843 }
7844
7845
7846 /* Do code byteswapping. Return FALSE afterwards so that the section is
7847 written out as normal. */
7848
7849 static bfd_boolean
7850 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
7851 bfd_byte *contents)
7852 {
7853 int mapcount;
7854 _arm_elf_section_data *arm_data;
7855 elf32_arm_section_map *map;
7856 bfd_vma ptr;
7857 bfd_vma end;
7858 bfd_vma offset;
7859 bfd_byte tmp;
7860 int i;
7861
7862 /* If this section has not been allocated an _arm_elf_section_data
7863 structure then we cannot record anything. */
7864 arm_data = get_arm_elf_section_data (sec);
7865 if (arm_data == NULL)
7866 return FALSE;
7867
7868 mapcount = arm_data->mapcount;
7869 map = arm_data->map;
7870
7871 if (mapcount == 0)
7872 return FALSE;
7873
7874 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
7875
7876 offset = sec->output_section->vma + sec->output_offset;
7877 ptr = map[0].vma - offset;
7878 for (i = 0; i < mapcount; i++)
7879 {
7880 if (i == mapcount - 1)
7881 end = sec->size;
7882 else
7883 end = map[i + 1].vma - offset;
7884
7885 switch (map[i].type)
7886 {
7887 case 'a':
7888 /* Byte swap code words. */
7889 while (ptr + 3 < end)
7890 {
7891 tmp = contents[ptr];
7892 contents[ptr] = contents[ptr + 3];
7893 contents[ptr + 3] = tmp;
7894 tmp = contents[ptr + 1];
7895 contents[ptr + 1] = contents[ptr + 2];
7896 contents[ptr + 2] = tmp;
7897 ptr += 4;
7898 }
7899 break;
7900
7901 case 't':
7902 /* Byte swap code halfwords. */
7903 while (ptr + 1 < end)
7904 {
7905 tmp = contents[ptr];
7906 contents[ptr] = contents[ptr + 1];
7907 contents[ptr + 1] = tmp;
7908 ptr += 2;
7909 }
7910 break;
7911
7912 case 'd':
7913 /* Leave data alone. */
7914 break;
7915 }
7916 ptr = end;
7917 }
7918
7919 free (map);
7920 arm_data->mapcount = 0;
7921 arm_data->map = NULL;
7922 unrecord_section_with_arm_elf_section_data (sec);
7923
7924 return FALSE;
7925 }
7926
7927 static void
7928 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
7929 asection * sec,
7930 void * ignore ATTRIBUTE_UNUSED)
7931 {
7932 unrecord_section_with_arm_elf_section_data (sec);
7933 }
7934
7935 static bfd_boolean
7936 elf32_arm_close_and_cleanup (bfd * abfd)
7937 {
7938 bfd_map_over_sections (abfd, unrecord_section_via_map_over_sections, NULL);
7939
7940 return _bfd_elf_close_and_cleanup (abfd);
7941 }
7942
7943 /* Display STT_ARM_TFUNC symbols as functions. */
7944
7945 static void
7946 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
7947 asymbol *asym)
7948 {
7949 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
7950
7951 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
7952 elfsym->symbol.flags |= BSF_FUNCTION;
7953 }
7954
7955
7956 /* Mangle thumb function symbols as we read them in. */
7957
7958 static void
7959 elf32_arm_swap_symbol_in (bfd * abfd,
7960 const void *psrc,
7961 const void *pshn,
7962 Elf_Internal_Sym *dst)
7963 {
7964 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
7965
7966 /* New EABI objects mark thumb function symbols by setting the low bit of
7967 the address. Turn these into STT_ARM_TFUNC. */
7968 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
7969 && (dst->st_value & 1))
7970 {
7971 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
7972 dst->st_value &= ~(bfd_vma) 1;
7973 }
7974 }
7975
7976
7977 /* Mangle thumb function symbols as we write them out. */
7978
7979 static void
7980 elf32_arm_swap_symbol_out (bfd *abfd,
7981 const Elf_Internal_Sym *src,
7982 void *cdst,
7983 void *shndx)
7984 {
7985 Elf_Internal_Sym newsym;
7986
7987 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
7988 of the address set, as per the new EABI. We do this unconditionally
7989 because objcopy does not set the elf header flags until after
7990 it writes out the symbol table. */
7991 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
7992 {
7993 newsym = *src;
7994 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
7995 newsym.st_value |= 1;
7996
7997 src = &newsym;
7998 }
7999 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
8000 }
8001
8002 /* Add the PT_ARM_EXIDX program header. */
8003
8004 static bfd_boolean
8005 elf32_arm_modify_segment_map (bfd *abfd,
8006 struct bfd_link_info *info ATTRIBUTE_UNUSED)
8007 {
8008 struct elf_segment_map *m;
8009 asection *sec;
8010
8011 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
8012 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
8013 {
8014 /* If there is already a PT_ARM_EXIDX header, then we do not
8015 want to add another one. This situation arises when running
8016 "strip"; the input binary already has the header. */
8017 m = elf_tdata (abfd)->segment_map;
8018 while (m && m->p_type != PT_ARM_EXIDX)
8019 m = m->next;
8020 if (!m)
8021 {
8022 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
8023 if (m == NULL)
8024 return FALSE;
8025 m->p_type = PT_ARM_EXIDX;
8026 m->count = 1;
8027 m->sections[0] = sec;
8028
8029 m->next = elf_tdata (abfd)->segment_map;
8030 elf_tdata (abfd)->segment_map = m;
8031 }
8032 }
8033
8034 return TRUE;
8035 }
8036
8037 /* We may add a PT_ARM_EXIDX program header. */
8038
8039 static int
8040 elf32_arm_additional_program_headers (bfd *abfd)
8041 {
8042 asection *sec;
8043
8044 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
8045 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
8046 return 1;
8047 else
8048 return 0;
8049 }
8050
8051 /* We use this to override swap_symbol_in and swap_symbol_out. */
8052 const struct elf_size_info elf32_arm_size_info = {
8053 sizeof (Elf32_External_Ehdr),
8054 sizeof (Elf32_External_Phdr),
8055 sizeof (Elf32_External_Shdr),
8056 sizeof (Elf32_External_Rel),
8057 sizeof (Elf32_External_Rela),
8058 sizeof (Elf32_External_Sym),
8059 sizeof (Elf32_External_Dyn),
8060 sizeof (Elf_External_Note),
8061 4,
8062 1,
8063 32, 2,
8064 ELFCLASS32, EV_CURRENT,
8065 bfd_elf32_write_out_phdrs,
8066 bfd_elf32_write_shdrs_and_ehdr,
8067 bfd_elf32_write_relocs,
8068 elf32_arm_swap_symbol_in,
8069 elf32_arm_swap_symbol_out,
8070 bfd_elf32_slurp_reloc_table,
8071 bfd_elf32_slurp_symbol_table,
8072 bfd_elf32_swap_dyn_in,
8073 bfd_elf32_swap_dyn_out,
8074 bfd_elf32_swap_reloc_in,
8075 bfd_elf32_swap_reloc_out,
8076 bfd_elf32_swap_reloca_in,
8077 bfd_elf32_swap_reloca_out
8078 };
8079
8080 #define ELF_ARCH bfd_arch_arm
8081 #define ELF_MACHINE_CODE EM_ARM
8082 #ifdef __QNXTARGET__
8083 #define ELF_MAXPAGESIZE 0x1000
8084 #else
8085 #define ELF_MAXPAGESIZE 0x8000
8086 #endif
8087 #define ELF_MINPAGESIZE 0x1000
8088
8089 #define bfd_elf32_mkobject elf32_arm_mkobject
8090
8091 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
8092 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
8093 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
8094 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
8095 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
8096 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
8097 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
8098 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
8099 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
8100 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
8101 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
8102 #define bfd_elf32_bfd_final_link elf32_arm_bfd_final_link
8103
8104 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
8105 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
8106 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
8107 #define elf_backend_check_relocs elf32_arm_check_relocs
8108 #define elf_backend_relocate_section elf32_arm_relocate_section
8109 #define elf_backend_write_section elf32_arm_write_section
8110 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
8111 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
8112 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
8113 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
8114 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
8115 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
8116 #define elf_backend_post_process_headers elf32_arm_post_process_headers
8117 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
8118 #define elf_backend_object_p elf32_arm_object_p
8119 #define elf_backend_section_flags elf32_arm_section_flags
8120 #define elf_backend_fake_sections elf32_arm_fake_sections
8121 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
8122 #define elf_backend_final_write_processing elf32_arm_final_write_processing
8123 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
8124 #define elf_backend_symbol_processing elf32_arm_symbol_processing
8125 #define elf_backend_size_info elf32_arm_size_info
8126 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
8127 #define elf_backend_additional_program_headers \
8128 elf32_arm_additional_program_headers
8129
8130 #define elf_backend_can_refcount 1
8131 #define elf_backend_can_gc_sections 1
8132 #define elf_backend_plt_readonly 1
8133 #define elf_backend_want_got_plt 1
8134 #define elf_backend_want_plt_sym 0
8135 #define elf_backend_may_use_rel_p 1
8136 #define elf_backend_may_use_rela_p 0
8137 #define elf_backend_default_use_rela_p 0
8138 #define elf_backend_rela_normal 0
8139
8140 #define elf_backend_got_header_size 12
8141
8142 #include "elf32-target.h"
8143
8144 /* VxWorks Targets */
8145
8146 #undef TARGET_LITTLE_SYM
8147 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
8148 #undef TARGET_LITTLE_NAME
8149 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
8150 #undef TARGET_BIG_SYM
8151 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
8152 #undef TARGET_BIG_NAME
8153 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
8154
8155 /* Like elf32_arm_link_hash_table_create -- but overrides
8156 appropriately for VxWorks. */
8157 static struct bfd_link_hash_table *
8158 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
8159 {
8160 struct bfd_link_hash_table *ret;
8161
8162 ret = elf32_arm_link_hash_table_create (abfd);
8163 if (ret)
8164 {
8165 struct elf32_arm_link_hash_table *htab
8166 = (struct elf32_arm_link_hash_table *) ret;
8167 htab->use_rel = 0;
8168 htab->vxworks_p = 1;
8169 }
8170 return ret;
8171 }
8172
8173 static void
8174 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8175 {
8176 elf32_arm_final_write_processing (abfd, linker);
8177 elf_vxworks_final_write_processing (abfd, linker);
8178 }
8179
8180 #undef elf32_bed
8181 #define elf32_bed elf32_arm_vxworks_bed
8182
8183 #undef bfd_elf32_bfd_link_hash_table_create
8184 #define bfd_elf32_bfd_link_hash_table_create \
8185 elf32_arm_vxworks_link_hash_table_create
8186 #undef elf_backend_add_symbol_hook
8187 #define elf_backend_add_symbol_hook \
8188 elf_vxworks_add_symbol_hook
8189 #undef elf_backend_final_write_processing
8190 #define elf_backend_final_write_processing \
8191 elf32_arm_vxworks_final_write_processing
8192 #undef elf_backend_emit_relocs
8193 #define elf_backend_emit_relocs \
8194 elf_vxworks_emit_relocs
8195
8196 #undef elf_backend_may_use_rel_p
8197 #define elf_backend_may_use_rel_p 0
8198 #undef elf_backend_may_use_rela_p
8199 #define elf_backend_may_use_rela_p 1
8200 #undef elf_backend_default_use_rela_p
8201 #define elf_backend_default_use_rela_p 1
8202 #undef elf_backend_rela_normal
8203 #define elf_backend_rela_normal 1
8204 #undef elf_backend_want_plt_sym
8205 #define elf_backend_want_plt_sym 1
8206 #undef ELF_MAXPAGESIZE
8207 #define ELF_MAXPAGESIZE 0x1000
8208
8209 #include "elf32-target.h"
8210
8211
8212 /* Symbian OS Targets */
8213
8214 #undef TARGET_LITTLE_SYM
8215 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
8216 #undef TARGET_LITTLE_NAME
8217 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
8218 #undef TARGET_BIG_SYM
8219 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
8220 #undef TARGET_BIG_NAME
8221 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
8222
8223 /* Like elf32_arm_link_hash_table_create -- but overrides
8224 appropriately for Symbian OS. */
8225 static struct bfd_link_hash_table *
8226 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
8227 {
8228 struct bfd_link_hash_table *ret;
8229
8230 ret = elf32_arm_link_hash_table_create (abfd);
8231 if (ret)
8232 {
8233 struct elf32_arm_link_hash_table *htab
8234 = (struct elf32_arm_link_hash_table *)ret;
8235 /* There is no PLT header for Symbian OS. */
8236 htab->plt_header_size = 0;
8237 /* The PLT entries are each three instructions. */
8238 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
8239 htab->symbian_p = 1;
8240 /* Symbian uses armv5t or above, so use_blx is always true. */
8241 htab->use_blx = 1;
8242 htab->root.is_relocatable_executable = 1;
8243 }
8244 return ret;
8245 }
8246
8247 static const struct bfd_elf_special_section
8248 elf32_arm_symbian_special_sections[] =
8249 {
8250 /* In a BPABI executable, the dynamic linking sections do not go in
8251 the loadable read-only segment. The post-linker may wish to
8252 refer to these sections, but they are not part of the final
8253 program image. */
8254 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
8255 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
8256 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
8257 { ".got", 4, 0, SHT_PROGBITS, 0 },
8258 { ".hash", 5, 0, SHT_HASH, 0 },
8259 /* These sections do not need to be writable as the SymbianOS
8260 postlinker will arrange things so that no dynamic relocation is
8261 required. */
8262 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
8263 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
8264 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
8265 { NULL, 0, 0, 0, 0 }
8266 };
8267
8268 static void
8269 elf32_arm_symbian_begin_write_processing (bfd *abfd,
8270 struct bfd_link_info *link_info
8271 ATTRIBUTE_UNUSED)
8272 {
8273 /* BPABI objects are never loaded directly by an OS kernel; they are
8274 processed by a postlinker first, into an OS-specific format. If
8275 the D_PAGED bit is set on the file, BFD will align segments on
8276 page boundaries, so that an OS can directly map the file. With
8277 BPABI objects, that just results in wasted space. In addition,
8278 because we clear the D_PAGED bit, map_sections_to_segments will
8279 recognize that the program headers should not be mapped into any
8280 loadable segment. */
8281 abfd->flags &= ~D_PAGED;
8282 }
8283
8284 static bfd_boolean
8285 elf32_arm_symbian_modify_segment_map (bfd *abfd,
8286 struct bfd_link_info *info)
8287 {
8288 struct elf_segment_map *m;
8289 asection *dynsec;
8290
8291 /* BPABI shared libraries and executables should have a PT_DYNAMIC
8292 segment. However, because the .dynamic section is not marked
8293 with SEC_LOAD, the generic ELF code will not create such a
8294 segment. */
8295 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
8296 if (dynsec)
8297 {
8298 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
8299 m->next = elf_tdata (abfd)->segment_map;
8300 elf_tdata (abfd)->segment_map = m;
8301 }
8302
8303 /* Also call the generic arm routine. */
8304 return elf32_arm_modify_segment_map (abfd, info);
8305 }
8306
8307 #undef elf32_bed
8308 #define elf32_bed elf32_arm_symbian_bed
8309
8310 /* The dynamic sections are not allocated on SymbianOS; the postlinker
8311 will process them and then discard them. */
8312 #undef ELF_DYNAMIC_SEC_FLAGS
8313 #define ELF_DYNAMIC_SEC_FLAGS \
8314 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
8315
8316 #undef bfd_elf32_bfd_link_hash_table_create
8317 #define bfd_elf32_bfd_link_hash_table_create \
8318 elf32_arm_symbian_link_hash_table_create
8319 #undef elf_backend_add_symbol_hook
8320
8321 #undef elf_backend_special_sections
8322 #define elf_backend_special_sections elf32_arm_symbian_special_sections
8323
8324 #undef elf_backend_begin_write_processing
8325 #define elf_backend_begin_write_processing \
8326 elf32_arm_symbian_begin_write_processing
8327 #undef elf_backend_final_write_processing
8328 #define elf_backend_final_write_processing \
8329 elf32_arm_final_write_processing
8330 #undef elf_backend_emit_relocs
8331
8332 #undef elf_backend_modify_segment_map
8333 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
8334
8335 /* There is no .got section for BPABI objects, and hence no header. */
8336 #undef elf_backend_got_header_size
8337 #define elf_backend_got_header_size 0
8338
8339 /* Similarly, there is no .got.plt section. */
8340 #undef elf_backend_want_got_plt
8341 #define elf_backend_want_got_plt 0
8342
8343 #undef elf_backend_may_use_rel_p
8344 #define elf_backend_may_use_rel_p 1
8345 #undef elf_backend_may_use_rela_p
8346 #define elf_backend_may_use_rela_p 0
8347 #undef elf_backend_default_use_rela_p
8348 #define elf_backend_default_use_rela_p 0
8349 #undef elf_backend_rela_normal
8350 #define elf_backend_rela_normal 0
8351 #undef elf_backend_want_plt_sym
8352 #define elf_backend_want_plt_sym 0
8353 #undef ELF_MAXPAGESIZE
8354 #define ELF_MAXPAGESIZE 0x8000
8355
8356 #include "elf32-target.h"
GDB Binutils - Deliverables
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