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2008-03-09 Paul Brook <paul@codesourcery.com>
[binutils.git] / bfd / elf32-arm.c
blob1be33466560d09fccada929e654ad9d409935651
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libiberty.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf-vxworks.h"
28 #include "elf/arm.h"
29
30 #ifndef NUM_ELEM
31 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
32 #endif
33
34 /* Return the relocation section associated with NAME. HTAB is the
35 bfd's elf32_arm_link_hash_entry. */
36 #define RELOC_SECTION(HTAB, NAME) \
37 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
38
39 /* Return size of a relocation entry. HTAB is the bfd's
40 elf32_arm_link_hash_entry. */
41 #define RELOC_SIZE(HTAB) \
42 ((HTAB)->use_rel \
43 ? sizeof (Elf32_External_Rel) \
44 : sizeof (Elf32_External_Rela))
45
46 /* Return function to swap relocations in. HTAB is the bfd's
47 elf32_arm_link_hash_entry. */
48 #define SWAP_RELOC_IN(HTAB) \
49 ((HTAB)->use_rel \
50 ? bfd_elf32_swap_reloc_in \
51 : bfd_elf32_swap_reloca_in)
52
53 /* Return function to swap relocations out. HTAB is the bfd's
54 elf32_arm_link_hash_entry. */
55 #define SWAP_RELOC_OUT(HTAB) \
56 ((HTAB)->use_rel \
57 ? bfd_elf32_swap_reloc_out \
58 : bfd_elf32_swap_reloca_out)
59
60 #define elf_info_to_howto 0
61 #define elf_info_to_howto_rel elf32_arm_info_to_howto
62
63 #define ARM_ELF_ABI_VERSION 0
64 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
65
66 static struct elf_backend_data elf32_arm_vxworks_bed;
67
68 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
69 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
70 in that slot. */
71
72 static reloc_howto_type elf32_arm_howto_table_1[] =
73 {
74 /* No relocation */
75 HOWTO (R_ARM_NONE, /* type */
76 0, /* rightshift */
77 0, /* size (0 = byte, 1 = short, 2 = long) */
78 0, /* bitsize */
79 FALSE, /* pc_relative */
80 0, /* bitpos */
81 complain_overflow_dont,/* complain_on_overflow */
82 bfd_elf_generic_reloc, /* special_function */
83 "R_ARM_NONE", /* name */
84 FALSE, /* partial_inplace */
85 0, /* src_mask */
86 0, /* dst_mask */
87 FALSE), /* pcrel_offset */
88
89 HOWTO (R_ARM_PC24, /* type */
90 2, /* rightshift */
91 2, /* size (0 = byte, 1 = short, 2 = long) */
92 24, /* bitsize */
93 TRUE, /* pc_relative */
94 0, /* bitpos */
95 complain_overflow_signed,/* complain_on_overflow */
96 bfd_elf_generic_reloc, /* special_function */
97 "R_ARM_PC24", /* name */
98 FALSE, /* partial_inplace */
99 0x00ffffff, /* src_mask */
100 0x00ffffff, /* dst_mask */
101 TRUE), /* pcrel_offset */
102
103 /* 32 bit absolute */
104 HOWTO (R_ARM_ABS32, /* type */
105 0, /* rightshift */
106 2, /* size (0 = byte, 1 = short, 2 = long) */
107 32, /* bitsize */
108 FALSE, /* pc_relative */
109 0, /* bitpos */
110 complain_overflow_bitfield,/* complain_on_overflow */
111 bfd_elf_generic_reloc, /* special_function */
112 "R_ARM_ABS32", /* name */
113 FALSE, /* partial_inplace */
114 0xffffffff, /* src_mask */
115 0xffffffff, /* dst_mask */
116 FALSE), /* pcrel_offset */
117
118 /* standard 32bit pc-relative reloc */
119 HOWTO (R_ARM_REL32, /* type */
120 0, /* rightshift */
121 2, /* size (0 = byte, 1 = short, 2 = long) */
122 32, /* bitsize */
123 TRUE, /* pc_relative */
124 0, /* bitpos */
125 complain_overflow_bitfield,/* complain_on_overflow */
126 bfd_elf_generic_reloc, /* special_function */
127 "R_ARM_REL32", /* name */
128 FALSE, /* partial_inplace */
129 0xffffffff, /* src_mask */
130 0xffffffff, /* dst_mask */
131 TRUE), /* pcrel_offset */
132
133 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
134 HOWTO (R_ARM_LDR_PC_G0, /* type */
135 0, /* rightshift */
136 0, /* size (0 = byte, 1 = short, 2 = long) */
137 32, /* bitsize */
138 TRUE, /* pc_relative */
139 0, /* bitpos */
140 complain_overflow_dont,/* complain_on_overflow */
141 bfd_elf_generic_reloc, /* special_function */
142 "R_ARM_LDR_PC_G0", /* name */
143 FALSE, /* partial_inplace */
144 0xffffffff, /* src_mask */
145 0xffffffff, /* dst_mask */
146 TRUE), /* pcrel_offset */
147
148 /* 16 bit absolute */
149 HOWTO (R_ARM_ABS16, /* type */
150 0, /* rightshift */
151 1, /* size (0 = byte, 1 = short, 2 = long) */
152 16, /* bitsize */
153 FALSE, /* pc_relative */
154 0, /* bitpos */
155 complain_overflow_bitfield,/* complain_on_overflow */
156 bfd_elf_generic_reloc, /* special_function */
157 "R_ARM_ABS16", /* name */
158 FALSE, /* partial_inplace */
159 0x0000ffff, /* src_mask */
160 0x0000ffff, /* dst_mask */
161 FALSE), /* pcrel_offset */
162
163 /* 12 bit absolute */
164 HOWTO (R_ARM_ABS12, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 12, /* bitsize */
168 FALSE, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield,/* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_ARM_ABS12", /* name */
173 FALSE, /* partial_inplace */
174 0x00000fff, /* src_mask */
175 0x00000fff, /* dst_mask */
176 FALSE), /* pcrel_offset */
177
178 HOWTO (R_ARM_THM_ABS5, /* type */
179 6, /* rightshift */
180 1, /* size (0 = byte, 1 = short, 2 = long) */
181 5, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield,/* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_ARM_THM_ABS5", /* name */
187 FALSE, /* partial_inplace */
188 0x000007e0, /* src_mask */
189 0x000007e0, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* 8 bit absolute */
193 HOWTO (R_ARM_ABS8, /* type */
194 0, /* rightshift */
195 0, /* size (0 = byte, 1 = short, 2 = long) */
196 8, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_bitfield,/* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_ARM_ABS8", /* name */
202 FALSE, /* partial_inplace */
203 0x000000ff, /* src_mask */
204 0x000000ff, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 HOWTO (R_ARM_SBREL32, /* type */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 32, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont,/* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_ARM_SBREL32", /* name */
216 FALSE, /* partial_inplace */
217 0xffffffff, /* src_mask */
218 0xffffffff, /* dst_mask */
219 FALSE), /* pcrel_offset */
220
221 HOWTO (R_ARM_THM_CALL, /* type */
222 1, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 25, /* 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 0x000f0fff, /* src_mask */
700 0x000f0fff, /* 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 0x000f0fff, /* src_mask */
714 0x000f0fff, /* 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 0x000f0fff, /* src_mask */
728 0x000f0fff, /* 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 0x000f0fff, /* src_mask */
742 0x000f0fff, /* 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_dont,/* complain_on_overflow */
839 bfd_elf_generic_reloc, /* special_function */
840 "R_ARM_THM_ALU_PREL_11_0",/* name */
841 FALSE, /* partial_inplace */
842 0xffffffff, /* src_mask */
843 0xffffffff, /* 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_dont,/* complain_on_overflow */
853 bfd_elf_generic_reloc, /* special_function */
854 "R_ARM_THM_PC12", /* name */
855 FALSE, /* partial_inplace */
856 0xffffffff, /* src_mask */
857 0xffffffff, /* 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 /* Group relocations. */
889
890 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
891 0, /* rightshift */
892 2, /* size (0 = byte, 1 = short, 2 = long) */
893 32, /* bitsize */
894 TRUE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont,/* complain_on_overflow */
897 bfd_elf_generic_reloc, /* special_function */
898 "R_ARM_ALU_PC_G0_NC", /* name */
899 FALSE, /* partial_inplace */
900 0xffffffff, /* src_mask */
901 0xffffffff, /* dst_mask */
902 TRUE), /* pcrel_offset */
903
904 HOWTO (R_ARM_ALU_PC_G0, /* type */
905 0, /* rightshift */
906 2, /* size (0 = byte, 1 = short, 2 = long) */
907 32, /* bitsize */
908 TRUE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont,/* complain_on_overflow */
911 bfd_elf_generic_reloc, /* special_function */
912 "R_ARM_ALU_PC_G0", /* name */
913 FALSE, /* partial_inplace */
914 0xffffffff, /* src_mask */
915 0xffffffff, /* dst_mask */
916 TRUE), /* pcrel_offset */
917
918 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
919 0, /* rightshift */
920 2, /* size (0 = byte, 1 = short, 2 = long) */
921 32, /* bitsize */
922 TRUE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont,/* complain_on_overflow */
925 bfd_elf_generic_reloc, /* special_function */
926 "R_ARM_ALU_PC_G1_NC", /* name */
927 FALSE, /* partial_inplace */
928 0xffffffff, /* src_mask */
929 0xffffffff, /* dst_mask */
930 TRUE), /* pcrel_offset */
931
932 HOWTO (R_ARM_ALU_PC_G1, /* type */
933 0, /* rightshift */
934 2, /* size (0 = byte, 1 = short, 2 = long) */
935 32, /* bitsize */
936 TRUE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont,/* complain_on_overflow */
939 bfd_elf_generic_reloc, /* special_function */
940 "R_ARM_ALU_PC_G1", /* name */
941 FALSE, /* partial_inplace */
942 0xffffffff, /* src_mask */
943 0xffffffff, /* dst_mask */
944 TRUE), /* pcrel_offset */
945
946 HOWTO (R_ARM_ALU_PC_G2, /* type */
947 0, /* rightshift */
948 2, /* size (0 = byte, 1 = short, 2 = long) */
949 32, /* bitsize */
950 TRUE, /* pc_relative */
951 0, /* bitpos */
952 complain_overflow_dont,/* complain_on_overflow */
953 bfd_elf_generic_reloc, /* special_function */
954 "R_ARM_ALU_PC_G2", /* name */
955 FALSE, /* partial_inplace */
956 0xffffffff, /* src_mask */
957 0xffffffff, /* dst_mask */
958 TRUE), /* pcrel_offset */
959
960 HOWTO (R_ARM_LDR_PC_G1, /* type */
961 0, /* rightshift */
962 2, /* size (0 = byte, 1 = short, 2 = long) */
963 32, /* bitsize */
964 TRUE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont,/* complain_on_overflow */
967 bfd_elf_generic_reloc, /* special_function */
968 "R_ARM_LDR_PC_G1", /* name */
969 FALSE, /* partial_inplace */
970 0xffffffff, /* src_mask */
971 0xffffffff, /* dst_mask */
972 TRUE), /* pcrel_offset */
973
974 HOWTO (R_ARM_LDR_PC_G2, /* type */
975 0, /* rightshift */
976 2, /* size (0 = byte, 1 = short, 2 = long) */
977 32, /* bitsize */
978 TRUE, /* pc_relative */
979 0, /* bitpos */
980 complain_overflow_dont,/* complain_on_overflow */
981 bfd_elf_generic_reloc, /* special_function */
982 "R_ARM_LDR_PC_G2", /* name */
983 FALSE, /* partial_inplace */
984 0xffffffff, /* src_mask */
985 0xffffffff, /* dst_mask */
986 TRUE), /* pcrel_offset */
987
988 HOWTO (R_ARM_LDRS_PC_G0, /* type */
989 0, /* rightshift */
990 2, /* size (0 = byte, 1 = short, 2 = long) */
991 32, /* bitsize */
992 TRUE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_dont,/* complain_on_overflow */
995 bfd_elf_generic_reloc, /* special_function */
996 "R_ARM_LDRS_PC_G0", /* name */
997 FALSE, /* partial_inplace */
998 0xffffffff, /* src_mask */
999 0xffffffff, /* dst_mask */
1000 TRUE), /* pcrel_offset */
1001
1002 HOWTO (R_ARM_LDRS_PC_G1, /* type */
1003 0, /* rightshift */
1004 2, /* size (0 = byte, 1 = short, 2 = long) */
1005 32, /* bitsize */
1006 TRUE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_dont,/* complain_on_overflow */
1009 bfd_elf_generic_reloc, /* special_function */
1010 "R_ARM_LDRS_PC_G1", /* name */
1011 FALSE, /* partial_inplace */
1012 0xffffffff, /* src_mask */
1013 0xffffffff, /* dst_mask */
1014 TRUE), /* pcrel_offset */
1015
1016 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1017 0, /* rightshift */
1018 2, /* size (0 = byte, 1 = short, 2 = long) */
1019 32, /* bitsize */
1020 TRUE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont,/* complain_on_overflow */
1023 bfd_elf_generic_reloc, /* special_function */
1024 "R_ARM_LDRS_PC_G2", /* name */
1025 FALSE, /* partial_inplace */
1026 0xffffffff, /* src_mask */
1027 0xffffffff, /* dst_mask */
1028 TRUE), /* pcrel_offset */
1029
1030 HOWTO (R_ARM_LDC_PC_G0, /* type */
1031 0, /* rightshift */
1032 2, /* size (0 = byte, 1 = short, 2 = long) */
1033 32, /* bitsize */
1034 TRUE, /* pc_relative */
1035 0, /* bitpos */
1036 complain_overflow_dont,/* complain_on_overflow */
1037 bfd_elf_generic_reloc, /* special_function */
1038 "R_ARM_LDC_PC_G0", /* name */
1039 FALSE, /* partial_inplace */
1040 0xffffffff, /* src_mask */
1041 0xffffffff, /* dst_mask */
1042 TRUE), /* pcrel_offset */
1043
1044 HOWTO (R_ARM_LDC_PC_G1, /* type */
1045 0, /* rightshift */
1046 2, /* size (0 = byte, 1 = short, 2 = long) */
1047 32, /* bitsize */
1048 TRUE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 bfd_elf_generic_reloc, /* special_function */
1052 "R_ARM_LDC_PC_G1", /* name */
1053 FALSE, /* partial_inplace */
1054 0xffffffff, /* src_mask */
1055 0xffffffff, /* dst_mask */
1056 TRUE), /* pcrel_offset */
1057
1058 HOWTO (R_ARM_LDC_PC_G2, /* type */
1059 0, /* rightshift */
1060 2, /* size (0 = byte, 1 = short, 2 = long) */
1061 32, /* bitsize */
1062 TRUE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 bfd_elf_generic_reloc, /* special_function */
1066 "R_ARM_LDC_PC_G2", /* name */
1067 FALSE, /* partial_inplace */
1068 0xffffffff, /* src_mask */
1069 0xffffffff, /* dst_mask */
1070 TRUE), /* pcrel_offset */
1071
1072 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1073 0, /* rightshift */
1074 2, /* size (0 = byte, 1 = short, 2 = long) */
1075 32, /* bitsize */
1076 TRUE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_dont,/* complain_on_overflow */
1079 bfd_elf_generic_reloc, /* special_function */
1080 "R_ARM_ALU_SB_G0_NC", /* name */
1081 FALSE, /* partial_inplace */
1082 0xffffffff, /* src_mask */
1083 0xffffffff, /* dst_mask */
1084 TRUE), /* pcrel_offset */
1085
1086 HOWTO (R_ARM_ALU_SB_G0, /* type */
1087 0, /* rightshift */
1088 2, /* size (0 = byte, 1 = short, 2 = long) */
1089 32, /* bitsize */
1090 TRUE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont,/* complain_on_overflow */
1093 bfd_elf_generic_reloc, /* special_function */
1094 "R_ARM_ALU_SB_G0", /* name */
1095 FALSE, /* partial_inplace */
1096 0xffffffff, /* src_mask */
1097 0xffffffff, /* dst_mask */
1098 TRUE), /* pcrel_offset */
1099
1100 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1101 0, /* rightshift */
1102 2, /* size (0 = byte, 1 = short, 2 = long) */
1103 32, /* bitsize */
1104 TRUE, /* pc_relative */
1105 0, /* bitpos */
1106 complain_overflow_dont,/* complain_on_overflow */
1107 bfd_elf_generic_reloc, /* special_function */
1108 "R_ARM_ALU_SB_G1_NC", /* name */
1109 FALSE, /* partial_inplace */
1110 0xffffffff, /* src_mask */
1111 0xffffffff, /* dst_mask */
1112 TRUE), /* pcrel_offset */
1113
1114 HOWTO (R_ARM_ALU_SB_G1, /* type */
1115 0, /* rightshift */
1116 2, /* size (0 = byte, 1 = short, 2 = long) */
1117 32, /* bitsize */
1118 TRUE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont,/* complain_on_overflow */
1121 bfd_elf_generic_reloc, /* special_function */
1122 "R_ARM_ALU_SB_G1", /* name */
1123 FALSE, /* partial_inplace */
1124 0xffffffff, /* src_mask */
1125 0xffffffff, /* dst_mask */
1126 TRUE), /* pcrel_offset */
1127
1128 HOWTO (R_ARM_ALU_SB_G2, /* type */
1129 0, /* rightshift */
1130 2, /* size (0 = byte, 1 = short, 2 = long) */
1131 32, /* bitsize */
1132 TRUE, /* pc_relative */
1133 0, /* bitpos */
1134 complain_overflow_dont,/* complain_on_overflow */
1135 bfd_elf_generic_reloc, /* special_function */
1136 "R_ARM_ALU_SB_G2", /* name */
1137 FALSE, /* partial_inplace */
1138 0xffffffff, /* src_mask */
1139 0xffffffff, /* dst_mask */
1140 TRUE), /* pcrel_offset */
1141
1142 HOWTO (R_ARM_LDR_SB_G0, /* type */
1143 0, /* rightshift */
1144 2, /* size (0 = byte, 1 = short, 2 = long) */
1145 32, /* bitsize */
1146 TRUE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_ARM_LDR_SB_G0", /* name */
1151 FALSE, /* partial_inplace */
1152 0xffffffff, /* src_mask */
1153 0xffffffff, /* dst_mask */
1154 TRUE), /* pcrel_offset */
1155
1156 HOWTO (R_ARM_LDR_SB_G1, /* type */
1157 0, /* rightshift */
1158 2, /* size (0 = byte, 1 = short, 2 = long) */
1159 32, /* bitsize */
1160 TRUE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont,/* complain_on_overflow */
1163 bfd_elf_generic_reloc, /* special_function */
1164 "R_ARM_LDR_SB_G1", /* name */
1165 FALSE, /* partial_inplace */
1166 0xffffffff, /* src_mask */
1167 0xffffffff, /* dst_mask */
1168 TRUE), /* pcrel_offset */
1169
1170 HOWTO (R_ARM_LDR_SB_G2, /* type */
1171 0, /* rightshift */
1172 2, /* size (0 = byte, 1 = short, 2 = long) */
1173 32, /* bitsize */
1174 TRUE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont,/* complain_on_overflow */
1177 bfd_elf_generic_reloc, /* special_function */
1178 "R_ARM_LDR_SB_G2", /* name */
1179 FALSE, /* partial_inplace */
1180 0xffffffff, /* src_mask */
1181 0xffffffff, /* dst_mask */
1182 TRUE), /* pcrel_offset */
1183
1184 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 32, /* bitsize */
1188 TRUE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_dont,/* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_ARM_LDRS_SB_G0", /* name */
1193 FALSE, /* partial_inplace */
1194 0xffffffff, /* src_mask */
1195 0xffffffff, /* dst_mask */
1196 TRUE), /* pcrel_offset */
1197
1198 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1199 0, /* rightshift */
1200 2, /* size (0 = byte, 1 = short, 2 = long) */
1201 32, /* bitsize */
1202 TRUE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_dont,/* complain_on_overflow */
1205 bfd_elf_generic_reloc, /* special_function */
1206 "R_ARM_LDRS_SB_G1", /* name */
1207 FALSE, /* partial_inplace */
1208 0xffffffff, /* src_mask */
1209 0xffffffff, /* dst_mask */
1210 TRUE), /* pcrel_offset */
1211
1212 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1213 0, /* rightshift */
1214 2, /* size (0 = byte, 1 = short, 2 = long) */
1215 32, /* bitsize */
1216 TRUE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_ARM_LDRS_SB_G2", /* name */
1221 FALSE, /* partial_inplace */
1222 0xffffffff, /* src_mask */
1223 0xffffffff, /* dst_mask */
1224 TRUE), /* pcrel_offset */
1225
1226 HOWTO (R_ARM_LDC_SB_G0, /* type */
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 TRUE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont,/* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_ARM_LDC_SB_G0", /* name */
1235 FALSE, /* partial_inplace */
1236 0xffffffff, /* src_mask */
1237 0xffffffff, /* dst_mask */
1238 TRUE), /* pcrel_offset */
1239
1240 HOWTO (R_ARM_LDC_SB_G1, /* type */
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 TRUE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont,/* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_ARM_LDC_SB_G1", /* name */
1249 FALSE, /* partial_inplace */
1250 0xffffffff, /* src_mask */
1251 0xffffffff, /* dst_mask */
1252 TRUE), /* pcrel_offset */
1253
1254 HOWTO (R_ARM_LDC_SB_G2, /* type */
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 TRUE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont,/* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_ARM_LDC_SB_G2", /* name */
1263 FALSE, /* partial_inplace */
1264 0xffffffff, /* src_mask */
1265 0xffffffff, /* dst_mask */
1266 TRUE), /* pcrel_offset */
1267
1268 /* End of group relocations. */
1269
1270 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1271 0, /* rightshift */
1272 2, /* size (0 = byte, 1 = short, 2 = long) */
1273 16, /* bitsize */
1274 FALSE, /* pc_relative */
1275 0, /* bitpos */
1276 complain_overflow_dont,/* complain_on_overflow */
1277 bfd_elf_generic_reloc, /* special_function */
1278 "R_ARM_MOVW_BREL_NC", /* name */
1279 FALSE, /* partial_inplace */
1280 0x0000ffff, /* src_mask */
1281 0x0000ffff, /* dst_mask */
1282 FALSE), /* pcrel_offset */
1283
1284 HOWTO (R_ARM_MOVT_BREL, /* type */
1285 0, /* rightshift */
1286 2, /* size (0 = byte, 1 = short, 2 = long) */
1287 16, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_bitfield,/* complain_on_overflow */
1291 bfd_elf_generic_reloc, /* special_function */
1292 "R_ARM_MOVT_BREL", /* name */
1293 FALSE, /* partial_inplace */
1294 0x0000ffff, /* src_mask */
1295 0x0000ffff, /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 HOWTO (R_ARM_MOVW_BREL, /* type */
1299 0, /* rightshift */
1300 2, /* size (0 = byte, 1 = short, 2 = long) */
1301 16, /* bitsize */
1302 FALSE, /* pc_relative */
1303 0, /* bitpos */
1304 complain_overflow_dont,/* complain_on_overflow */
1305 bfd_elf_generic_reloc, /* special_function */
1306 "R_ARM_MOVW_BREL", /* name */
1307 FALSE, /* partial_inplace */
1308 0x0000ffff, /* src_mask */
1309 0x0000ffff, /* dst_mask */
1310 FALSE), /* pcrel_offset */
1311
1312 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1313 0, /* rightshift */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1315 16, /* bitsize */
1316 FALSE, /* pc_relative */
1317 0, /* bitpos */
1318 complain_overflow_dont,/* complain_on_overflow */
1319 bfd_elf_generic_reloc, /* special_function */
1320 "R_ARM_THM_MOVW_BREL_NC",/* name */
1321 FALSE, /* partial_inplace */
1322 0x040f70ff, /* src_mask */
1323 0x040f70ff, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1325
1326 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1327 0, /* rightshift */
1328 2, /* size (0 = byte, 1 = short, 2 = long) */
1329 16, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_bitfield,/* complain_on_overflow */
1333 bfd_elf_generic_reloc, /* special_function */
1334 "R_ARM_THM_MOVT_BREL", /* name */
1335 FALSE, /* partial_inplace */
1336 0x040f70ff, /* src_mask */
1337 0x040f70ff, /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1341 0, /* rightshift */
1342 2, /* size (0 = byte, 1 = short, 2 = long) */
1343 16, /* bitsize */
1344 FALSE, /* pc_relative */
1345 0, /* bitpos */
1346 complain_overflow_dont,/* complain_on_overflow */
1347 bfd_elf_generic_reloc, /* special_function */
1348 "R_ARM_THM_MOVW_BREL", /* name */
1349 FALSE, /* partial_inplace */
1350 0x040f70ff, /* src_mask */
1351 0x040f70ff, /* dst_mask */
1352 FALSE), /* pcrel_offset */
1353
1354 EMPTY_HOWTO (90), /* unallocated */
1355 EMPTY_HOWTO (91),
1356 EMPTY_HOWTO (92),
1357 EMPTY_HOWTO (93),
1358
1359 HOWTO (R_ARM_PLT32_ABS, /* type */
1360 0, /* rightshift */
1361 2, /* size (0 = byte, 1 = short, 2 = long) */
1362 32, /* bitsize */
1363 FALSE, /* pc_relative */
1364 0, /* bitpos */
1365 complain_overflow_dont,/* complain_on_overflow */
1366 bfd_elf_generic_reloc, /* special_function */
1367 "R_ARM_PLT32_ABS", /* name */
1368 FALSE, /* partial_inplace */
1369 0xffffffff, /* src_mask */
1370 0xffffffff, /* dst_mask */
1371 FALSE), /* pcrel_offset */
1372
1373 HOWTO (R_ARM_GOT_ABS, /* type */
1374 0, /* rightshift */
1375 2, /* size (0 = byte, 1 = short, 2 = long) */
1376 32, /* bitsize */
1377 FALSE, /* pc_relative */
1378 0, /* bitpos */
1379 complain_overflow_dont,/* complain_on_overflow */
1380 bfd_elf_generic_reloc, /* special_function */
1381 "R_ARM_GOT_ABS", /* name */
1382 FALSE, /* partial_inplace */
1383 0xffffffff, /* src_mask */
1384 0xffffffff, /* dst_mask */
1385 FALSE), /* pcrel_offset */
1386
1387 HOWTO (R_ARM_GOT_PREL, /* type */
1388 0, /* rightshift */
1389 2, /* size (0 = byte, 1 = short, 2 = long) */
1390 32, /* bitsize */
1391 TRUE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_dont, /* complain_on_overflow */
1394 bfd_elf_generic_reloc, /* special_function */
1395 "R_ARM_GOT_PREL", /* name */
1396 FALSE, /* partial_inplace */
1397 0xffffffff, /* src_mask */
1398 0xffffffff, /* dst_mask */
1399 TRUE), /* pcrel_offset */
1400
1401 HOWTO (R_ARM_GOT_BREL12, /* type */
1402 0, /* rightshift */
1403 2, /* size (0 = byte, 1 = short, 2 = long) */
1404 12, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_bitfield,/* complain_on_overflow */
1408 bfd_elf_generic_reloc, /* special_function */
1409 "R_ARM_GOT_BREL12", /* name */
1410 FALSE, /* partial_inplace */
1411 0x00000fff, /* src_mask */
1412 0x00000fff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 HOWTO (R_ARM_GOTOFF12, /* type */
1416 0, /* rightshift */
1417 2, /* size (0 = byte, 1 = short, 2 = long) */
1418 12, /* bitsize */
1419 FALSE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_bitfield,/* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_ARM_GOTOFF12", /* name */
1424 FALSE, /* partial_inplace */
1425 0x00000fff, /* src_mask */
1426 0x00000fff, /* dst_mask */
1427 FALSE), /* pcrel_offset */
1428
1429 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1430
1431 /* GNU extension to record C++ vtable member usage */
1432 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1433 0, /* rightshift */
1434 2, /* size (0 = byte, 1 = short, 2 = long) */
1435 0, /* bitsize */
1436 FALSE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1440 "R_ARM_GNU_VTENTRY", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0, /* dst_mask */
1444 FALSE), /* pcrel_offset */
1445
1446 /* GNU extension to record C++ vtable hierarchy */
1447 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1448 0, /* rightshift */
1449 2, /* size (0 = byte, 1 = short, 2 = long) */
1450 0, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 NULL, /* special_function */
1455 "R_ARM_GNU_VTINHERIT", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 HOWTO (R_ARM_THM_JUMP11, /* type */
1462 1, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 11, /* bitsize */
1465 TRUE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 bfd_elf_generic_reloc, /* special_function */
1469 "R_ARM_THM_JUMP11", /* name */
1470 FALSE, /* partial_inplace */
1471 0x000007ff, /* src_mask */
1472 0x000007ff, /* dst_mask */
1473 TRUE), /* pcrel_offset */
1474
1475 HOWTO (R_ARM_THM_JUMP8, /* type */
1476 1, /* rightshift */
1477 1, /* size (0 = byte, 1 = short, 2 = long) */
1478 8, /* bitsize */
1479 TRUE, /* pc_relative */
1480 0, /* bitpos */
1481 complain_overflow_signed, /* complain_on_overflow */
1482 bfd_elf_generic_reloc, /* special_function */
1483 "R_ARM_THM_JUMP8", /* name */
1484 FALSE, /* partial_inplace */
1485 0x000000ff, /* src_mask */
1486 0x000000ff, /* dst_mask */
1487 TRUE), /* pcrel_offset */
1488
1489 /* TLS relocations */
1490 HOWTO (R_ARM_TLS_GD32, /* type */
1491 0, /* rightshift */
1492 2, /* size (0 = byte, 1 = short, 2 = long) */
1493 32, /* bitsize */
1494 FALSE, /* pc_relative */
1495 0, /* bitpos */
1496 complain_overflow_bitfield,/* complain_on_overflow */
1497 NULL, /* special_function */
1498 "R_ARM_TLS_GD32", /* name */
1499 TRUE, /* partial_inplace */
1500 0xffffffff, /* src_mask */
1501 0xffffffff, /* dst_mask */
1502 FALSE), /* pcrel_offset */
1503
1504 HOWTO (R_ARM_TLS_LDM32, /* type */
1505 0, /* rightshift */
1506 2, /* size (0 = byte, 1 = short, 2 = long) */
1507 32, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_bitfield,/* complain_on_overflow */
1511 bfd_elf_generic_reloc, /* special_function */
1512 "R_ARM_TLS_LDM32", /* name */
1513 TRUE, /* partial_inplace */
1514 0xffffffff, /* src_mask */
1515 0xffffffff, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 HOWTO (R_ARM_TLS_LDO32, /* type */
1519 0, /* rightshift */
1520 2, /* size (0 = byte, 1 = short, 2 = long) */
1521 32, /* bitsize */
1522 FALSE, /* pc_relative */
1523 0, /* bitpos */
1524 complain_overflow_bitfield,/* complain_on_overflow */
1525 bfd_elf_generic_reloc, /* special_function */
1526 "R_ARM_TLS_LDO32", /* name */
1527 TRUE, /* partial_inplace */
1528 0xffffffff, /* src_mask */
1529 0xffffffff, /* dst_mask */
1530 FALSE), /* pcrel_offset */
1531
1532 HOWTO (R_ARM_TLS_IE32, /* type */
1533 0, /* rightshift */
1534 2, /* size (0 = byte, 1 = short, 2 = long) */
1535 32, /* bitsize */
1536 FALSE, /* pc_relative */
1537 0, /* bitpos */
1538 complain_overflow_bitfield,/* complain_on_overflow */
1539 NULL, /* special_function */
1540 "R_ARM_TLS_IE32", /* name */
1541 TRUE, /* partial_inplace */
1542 0xffffffff, /* src_mask */
1543 0xffffffff, /* dst_mask */
1544 FALSE), /* pcrel_offset */
1545
1546 HOWTO (R_ARM_TLS_LE32, /* type */
1547 0, /* rightshift */
1548 2, /* size (0 = byte, 1 = short, 2 = long) */
1549 32, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_bitfield,/* complain_on_overflow */
1553 bfd_elf_generic_reloc, /* special_function */
1554 "R_ARM_TLS_LE32", /* name */
1555 TRUE, /* partial_inplace */
1556 0xffffffff, /* src_mask */
1557 0xffffffff, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 HOWTO (R_ARM_TLS_LDO12, /* type */
1561 0, /* rightshift */
1562 2, /* size (0 = byte, 1 = short, 2 = long) */
1563 12, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_bitfield,/* complain_on_overflow */
1567 bfd_elf_generic_reloc, /* special_function */
1568 "R_ARM_TLS_LDO12", /* name */
1569 FALSE, /* partial_inplace */
1570 0x00000fff, /* src_mask */
1571 0x00000fff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 HOWTO (R_ARM_TLS_LE12, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 12, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_bitfield,/* complain_on_overflow */
1581 bfd_elf_generic_reloc, /* special_function */
1582 "R_ARM_TLS_LE12", /* name */
1583 FALSE, /* partial_inplace */
1584 0x00000fff, /* src_mask */
1585 0x00000fff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 HOWTO (R_ARM_TLS_IE12GP, /* type */
1589 0, /* rightshift */
1590 2, /* size (0 = byte, 1 = short, 2 = long) */
1591 12, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_bitfield,/* complain_on_overflow */
1595 bfd_elf_generic_reloc, /* special_function */
1596 "R_ARM_TLS_IE12GP", /* name */
1597 FALSE, /* partial_inplace */
1598 0x00000fff, /* src_mask */
1599 0x00000fff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601 };
1602
1603 /* 112-127 private relocations
1604 128 R_ARM_ME_TOO, obsolete
1605 129-255 unallocated in AAELF.
1606
1607 249-255 extended, currently unused, relocations: */
1608
1609 static reloc_howto_type elf32_arm_howto_table_2[4] =
1610 {
1611 HOWTO (R_ARM_RREL32, /* type */
1612 0, /* rightshift */
1613 0, /* size (0 = byte, 1 = short, 2 = long) */
1614 0, /* bitsize */
1615 FALSE, /* pc_relative */
1616 0, /* bitpos */
1617 complain_overflow_dont,/* complain_on_overflow */
1618 bfd_elf_generic_reloc, /* special_function */
1619 "R_ARM_RREL32", /* name */
1620 FALSE, /* partial_inplace */
1621 0, /* src_mask */
1622 0, /* dst_mask */
1623 FALSE), /* pcrel_offset */
1624
1625 HOWTO (R_ARM_RABS32, /* type */
1626 0, /* rightshift */
1627 0, /* size (0 = byte, 1 = short, 2 = long) */
1628 0, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont,/* complain_on_overflow */
1632 bfd_elf_generic_reloc, /* special_function */
1633 "R_ARM_RABS32", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 HOWTO (R_ARM_RPC24, /* type */
1640 0, /* rightshift */
1641 0, /* size (0 = byte, 1 = short, 2 = long) */
1642 0, /* bitsize */
1643 FALSE, /* pc_relative */
1644 0, /* bitpos */
1645 complain_overflow_dont,/* complain_on_overflow */
1646 bfd_elf_generic_reloc, /* special_function */
1647 "R_ARM_RPC24", /* name */
1648 FALSE, /* partial_inplace */
1649 0, /* src_mask */
1650 0, /* dst_mask */
1651 FALSE), /* pcrel_offset */
1652
1653 HOWTO (R_ARM_RBASE, /* type */
1654 0, /* rightshift */
1655 0, /* size (0 = byte, 1 = short, 2 = long) */
1656 0, /* bitsize */
1657 FALSE, /* pc_relative */
1658 0, /* bitpos */
1659 complain_overflow_dont,/* complain_on_overflow */
1660 bfd_elf_generic_reloc, /* special_function */
1661 "R_ARM_RBASE", /* name */
1662 FALSE, /* partial_inplace */
1663 0, /* src_mask */
1664 0, /* dst_mask */
1665 FALSE) /* pcrel_offset */
1666 };
1667
1668 static reloc_howto_type *
1669 elf32_arm_howto_from_type (unsigned int r_type)
1670 {
1671 if (r_type < NUM_ELEM (elf32_arm_howto_table_1))
1672 return &elf32_arm_howto_table_1[r_type];
1673
1674 if (r_type >= R_ARM_RREL32
1675 && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2))
1676 return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32];
1677
1678 return NULL;
1679 }
1680
1681 static void
1682 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1683 Elf_Internal_Rela * elf_reloc)
1684 {
1685 unsigned int r_type;
1686
1687 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1688 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1689 }
1690
1691 struct elf32_arm_reloc_map
1692 {
1693 bfd_reloc_code_real_type bfd_reloc_val;
1694 unsigned char elf_reloc_val;
1695 };
1696
1697 /* All entries in this list must also be present in elf32_arm_howto_table. */
1698 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1699 {
1700 {BFD_RELOC_NONE, R_ARM_NONE},
1701 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1702 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1703 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1704 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1705 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1706 {BFD_RELOC_32, R_ARM_ABS32},
1707 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1708 {BFD_RELOC_8, R_ARM_ABS8},
1709 {BFD_RELOC_16, R_ARM_ABS16},
1710 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1711 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1712 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1713 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1714 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1715 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1716 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1717 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1718 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1719 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1720 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1721 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1722 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1723 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1724 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1725 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1726 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1727 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1728 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1729 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1730 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1731 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1732 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1733 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1734 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1735 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1736 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1737 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1738 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1739 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1740 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1741 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1742 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1743 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1744 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1745 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1746 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1747 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1748 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1749 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1750 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1751 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1752 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1753 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1754 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1755 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1756 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1757 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1758 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1759 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1760 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1761 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1762 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1763 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1764 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1765 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1766 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1767 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1768 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1769 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1770 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1771 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1772 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1773 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1774 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1775 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1776 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
1777 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX}
1778 };
1779
1780 static reloc_howto_type *
1781 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1782 bfd_reloc_code_real_type code)
1783 {
1784 unsigned int i;
1785 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1786 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1787 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1788
1789 return NULL;
1790 }
1791
1792 static reloc_howto_type *
1793 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1794 const char *r_name)
1795 {
1796 unsigned int i;
1797
1798 for (i = 0;
1799 i < (sizeof (elf32_arm_howto_table_1)
1800 / sizeof (elf32_arm_howto_table_1[0]));
1801 i++)
1802 if (elf32_arm_howto_table_1[i].name != NULL
1803 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1804 return &elf32_arm_howto_table_1[i];
1805
1806 for (i = 0;
1807 i < (sizeof (elf32_arm_howto_table_2)
1808 / sizeof (elf32_arm_howto_table_2[0]));
1809 i++)
1810 if (elf32_arm_howto_table_2[i].name != NULL
1811 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1812 return &elf32_arm_howto_table_2[i];
1813
1814 return NULL;
1815 }
1816
1817 /* Support for core dump NOTE sections */
1818 static bfd_boolean
1819 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1820 {
1821 int offset;
1822 size_t size;
1823
1824 switch (note->descsz)
1825 {
1826 default:
1827 return FALSE;
1828
1829 case 148: /* Linux/ARM 32-bit*/
1830 /* pr_cursig */
1831 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1832
1833 /* pr_pid */
1834 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1835
1836 /* pr_reg */
1837 offset = 72;
1838 size = 72;
1839
1840 break;
1841 }
1842
1843 /* Make a ".reg/999" section. */
1844 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1845 size, note->descpos + offset);
1846 }
1847
1848 static bfd_boolean
1849 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1850 {
1851 switch (note->descsz)
1852 {
1853 default:
1854 return FALSE;
1855
1856 case 124: /* Linux/ARM elf_prpsinfo */
1857 elf_tdata (abfd)->core_program
1858 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1859 elf_tdata (abfd)->core_command
1860 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1861 }
1862
1863 /* Note that for some reason, a spurious space is tacked
1864 onto the end of the args in some (at least one anyway)
1865 implementations, so strip it off if it exists. */
1866
1867 {
1868 char *command = elf_tdata (abfd)->core_command;
1869 int n = strlen (command);
1870
1871 if (0 < n && command[n - 1] == ' ')
1872 command[n - 1] = '\0';
1873 }
1874
1875 return TRUE;
1876 }
1877
1878 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1879 #define TARGET_LITTLE_NAME "elf32-littlearm"
1880 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1881 #define TARGET_BIG_NAME "elf32-bigarm"
1882
1883 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1884 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1885
1886 typedef unsigned long int insn32;
1887 typedef unsigned short int insn16;
1888
1889 /* In lieu of proper flags, assume all EABIv4 or later objects are
1890 interworkable. */
1891 #define INTERWORK_FLAG(abfd) \
1892 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1893 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1894
1895 /* The linker script knows the section names for placement.
1896 The entry_names are used to do simple name mangling on the stubs.
1897 Given a function name, and its type, the stub can be found. The
1898 name can be changed. The only requirement is the %s be present. */
1899 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1900 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1901
1902 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1903 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1904
1905 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1906 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1907
1908 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
1909 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
1910
1911 /* The name of the dynamic interpreter. This is put in the .interp
1912 section. */
1913 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1914
1915 #ifdef FOUR_WORD_PLT
1916
1917 /* The first entry in a procedure linkage table looks like
1918 this. It is set up so that any shared library function that is
1919 called before the relocation has been set up calls the dynamic
1920 linker first. */
1921 static const bfd_vma elf32_arm_plt0_entry [] =
1922 {
1923 0xe52de004, /* str lr, [sp, #-4]! */
1924 0xe59fe010, /* ldr lr, [pc, #16] */
1925 0xe08fe00e, /* add lr, pc, lr */
1926 0xe5bef008, /* ldr pc, [lr, #8]! */
1927 };
1928
1929 /* Subsequent entries in a procedure linkage table look like
1930 this. */
1931 static const bfd_vma elf32_arm_plt_entry [] =
1932 {
1933 0xe28fc600, /* add ip, pc, #NN */
1934 0xe28cca00, /* add ip, ip, #NN */
1935 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1936 0x00000000, /* unused */
1937 };
1938
1939 #else
1940
1941 /* The first entry in a procedure linkage table looks like
1942 this. It is set up so that any shared library function that is
1943 called before the relocation has been set up calls the dynamic
1944 linker first. */
1945 static const bfd_vma elf32_arm_plt0_entry [] =
1946 {
1947 0xe52de004, /* str lr, [sp, #-4]! */
1948 0xe59fe004, /* ldr lr, [pc, #4] */
1949 0xe08fe00e, /* add lr, pc, lr */
1950 0xe5bef008, /* ldr pc, [lr, #8]! */
1951 0x00000000, /* &GOT[0] - . */
1952 };
1953
1954 /* Subsequent entries in a procedure linkage table look like
1955 this. */
1956 static const bfd_vma elf32_arm_plt_entry [] =
1957 {
1958 0xe28fc600, /* add ip, pc, #0xNN00000 */
1959 0xe28cca00, /* add ip, ip, #0xNN000 */
1960 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1961 };
1962
1963 #endif
1964
1965 /* The format of the first entry in the procedure linkage table
1966 for a VxWorks executable. */
1967 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1968 {
1969 0xe52dc008, /* str ip,[sp,#-8]! */
1970 0xe59fc000, /* ldr ip,[pc] */
1971 0xe59cf008, /* ldr pc,[ip,#8] */
1972 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1973 };
1974
1975 /* The format of subsequent entries in a VxWorks executable. */
1976 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1977 {
1978 0xe59fc000, /* ldr ip,[pc] */
1979 0xe59cf000, /* ldr pc,[ip] */
1980 0x00000000, /* .long @got */
1981 0xe59fc000, /* ldr ip,[pc] */
1982 0xea000000, /* b _PLT */
1983 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1984 };
1985
1986 /* The format of entries in a VxWorks shared library. */
1987 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1988 {
1989 0xe59fc000, /* ldr ip,[pc] */
1990 0xe79cf009, /* ldr pc,[ip,r9] */
1991 0x00000000, /* .long @got */
1992 0xe59fc000, /* ldr ip,[pc] */
1993 0xe599f008, /* ldr pc,[r9,#8] */
1994 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1995 };
1996
1997 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1998 #define PLT_THUMB_STUB_SIZE 4
1999 static const bfd_vma elf32_arm_plt_thumb_stub [] =
2000 {
2001 0x4778, /* bx pc */
2002 0x46c0 /* nop */
2003 };
2004
2005 /* The entries in a PLT when using a DLL-based target with multiple
2006 address spaces. */
2007 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2008 {
2009 0xe51ff004, /* ldr pc, [pc, #-4] */
2010 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2011 };
2012
2013 /* Used to build a map of a section. This is required for mixed-endian
2014 code/data. */
2015
2016 typedef struct elf32_elf_section_map
2017 {
2018 bfd_vma vma;
2019 char type;
2020 }
2021 elf32_arm_section_map;
2022
2023 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2024
2025 typedef enum
2026 {
2027 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2028 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2029 VFP11_ERRATUM_ARM_VENEER,
2030 VFP11_ERRATUM_THUMB_VENEER
2031 }
2032 elf32_vfp11_erratum_type;
2033
2034 typedef struct elf32_vfp11_erratum_list
2035 {
2036 struct elf32_vfp11_erratum_list *next;
2037 bfd_vma vma;
2038 union
2039 {
2040 struct
2041 {
2042 struct elf32_vfp11_erratum_list *veneer;
2043 unsigned int vfp_insn;
2044 } b;
2045 struct
2046 {
2047 struct elf32_vfp11_erratum_list *branch;
2048 unsigned int id;
2049 } v;
2050 } u;
2051 elf32_vfp11_erratum_type type;
2052 }
2053 elf32_vfp11_erratum_list;
2054
2055 typedef struct _arm_elf_section_data
2056 {
2057 struct bfd_elf_section_data elf;
2058 unsigned int mapcount;
2059 unsigned int mapsize;
2060 elf32_arm_section_map *map;
2061 unsigned int erratumcount;
2062 elf32_vfp11_erratum_list *erratumlist;
2063 }
2064 _arm_elf_section_data;
2065
2066 #define elf32_arm_section_data(sec) \
2067 ((_arm_elf_section_data *) elf_section_data (sec))
2068
2069 /* The size of the thread control block. */
2070 #define TCB_SIZE 8
2071
2072 struct elf_arm_obj_tdata
2073 {
2074 struct elf_obj_tdata root;
2075
2076 /* tls_type for each local got entry. */
2077 char *local_got_tls_type;
2078
2079 /* Zero to warn when linking objects with incompatible enum sizes. */
2080 int no_enum_size_warning;
2081 };
2082
2083 #define elf_arm_tdata(bfd) \
2084 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2085
2086 #define elf32_arm_local_got_tls_type(bfd) \
2087 (elf_arm_tdata (bfd)->local_got_tls_type)
2088
2089 #define is_arm_elf(bfd) \
2090 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2091 && elf_tdata (bfd) != NULL \
2092 && elf_object_id (bfd) == ARM_ELF_TDATA)
2093
2094 static bfd_boolean
2095 elf32_arm_mkobject (bfd *abfd)
2096 {
2097 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2098 ARM_ELF_TDATA);
2099 }
2100
2101 /* The ARM linker needs to keep track of the number of relocs that it
2102 decides to copy in check_relocs for each symbol. This is so that
2103 it can discard PC relative relocs if it doesn't need them when
2104 linking with -Bsymbolic. We store the information in a field
2105 extending the regular ELF linker hash table. */
2106
2107 /* This structure keeps track of the number of relocs we have copied
2108 for a given symbol. */
2109 struct elf32_arm_relocs_copied
2110 {
2111 /* Next section. */
2112 struct elf32_arm_relocs_copied * next;
2113 /* A section in dynobj. */
2114 asection * section;
2115 /* Number of relocs copied in this section. */
2116 bfd_size_type count;
2117 /* Number of PC-relative relocs copied in this section. */
2118 bfd_size_type pc_count;
2119 };
2120
2121 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2122
2123 /* Arm ELF linker hash entry. */
2124 struct elf32_arm_link_hash_entry
2125 {
2126 struct elf_link_hash_entry root;
2127
2128 /* Number of PC relative relocs copied for this symbol. */
2129 struct elf32_arm_relocs_copied * relocs_copied;
2130
2131 /* We reference count Thumb references to a PLT entry separately,
2132 so that we can emit the Thumb trampoline only if needed. */
2133 bfd_signed_vma plt_thumb_refcount;
2134
2135 /* Some references from Thumb code may be eliminated by BL->BLX
2136 conversion, so record them separately. */
2137 bfd_signed_vma plt_maybe_thumb_refcount;
2138
2139 /* Since PLT entries have variable size if the Thumb prologue is
2140 used, we need to record the index into .got.plt instead of
2141 recomputing it from the PLT offset. */
2142 bfd_signed_vma plt_got_offset;
2143
2144 #define GOT_UNKNOWN 0
2145 #define GOT_NORMAL 1
2146 #define GOT_TLS_GD 2
2147 #define GOT_TLS_IE 4
2148 unsigned char tls_type;
2149
2150 /* The symbol marking the real symbol location for exported thumb
2151 symbols with Arm stubs. */
2152 struct elf_link_hash_entry *export_glue;
2153 };
2154
2155 /* Traverse an arm ELF linker hash table. */
2156 #define elf32_arm_link_hash_traverse(table, func, info) \
2157 (elf_link_hash_traverse \
2158 (&(table)->root, \
2159 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2160 (info)))
2161
2162 /* Get the ARM elf linker hash table from a link_info structure. */
2163 #define elf32_arm_hash_table(info) \
2164 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2165
2166 /* ARM ELF linker hash table. */
2167 struct elf32_arm_link_hash_table
2168 {
2169 /* The main hash table. */
2170 struct elf_link_hash_table root;
2171
2172 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2173 bfd_size_type thumb_glue_size;
2174
2175 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2176 bfd_size_type arm_glue_size;
2177
2178 /* The size in bytes of section containing the ARMv4 BX veneers. */
2179 bfd_size_type bx_glue_size;
2180
2181 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2182 veneer has been populated. */
2183 bfd_vma bx_glue_offset[15];
2184
2185 /* The size in bytes of the section containing glue for VFP11 erratum
2186 veneers. */
2187 bfd_size_type vfp11_erratum_glue_size;
2188
2189 /* An arbitrary input BFD chosen to hold the glue sections. */
2190 bfd * bfd_of_glue_owner;
2191
2192 /* Nonzero to output a BE8 image. */
2193 int byteswap_code;
2194
2195 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2196 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2197 int target1_is_rel;
2198
2199 /* The relocation to use for R_ARM_TARGET2 relocations. */
2200 int target2_reloc;
2201
2202 /* 0 = Ignore R_ARM_V4BX.
2203 1 = Convert BX to MOV PC.
2204 2 = Generate v4 interworing stubs. */
2205 int fix_v4bx;
2206
2207 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2208 int use_blx;
2209
2210 /* What sort of code sequences we should look for which may trigger the
2211 VFP11 denorm erratum. */
2212 bfd_arm_vfp11_fix vfp11_fix;
2213
2214 /* Global counter for the number of fixes we have emitted. */
2215 int num_vfp11_fixes;
2216
2217 /* Nonzero to force PIC branch veneers. */
2218 int pic_veneer;
2219
2220 /* The number of bytes in the initial entry in the PLT. */
2221 bfd_size_type plt_header_size;
2222
2223 /* The number of bytes in the subsequent PLT etries. */
2224 bfd_size_type plt_entry_size;
2225
2226 /* True if the target system is VxWorks. */
2227 int vxworks_p;
2228
2229 /* True if the target system is Symbian OS. */
2230 int symbian_p;
2231
2232 /* True if the target uses REL relocations. */
2233 int use_rel;
2234
2235 /* Short-cuts to get to dynamic linker sections. */
2236 asection *sgot;
2237 asection *sgotplt;
2238 asection *srelgot;
2239 asection *splt;
2240 asection *srelplt;
2241 asection *sdynbss;
2242 asection *srelbss;
2243
2244 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2245 asection *srelplt2;
2246
2247 /* Data for R_ARM_TLS_LDM32 relocations. */
2248 union {
2249 bfd_signed_vma refcount;
2250 bfd_vma offset;
2251 } tls_ldm_got;
2252
2253 /* Small local sym to section mapping cache. */
2254 struct sym_sec_cache sym_sec;
2255
2256 /* For convenience in allocate_dynrelocs. */
2257 bfd * obfd;
2258 };
2259
2260 /* Create an entry in an ARM ELF linker hash table. */
2261
2262 static struct bfd_hash_entry *
2263 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2264 struct bfd_hash_table * table,
2265 const char * string)
2266 {
2267 struct elf32_arm_link_hash_entry * ret =
2268 (struct elf32_arm_link_hash_entry *) entry;
2269
2270 /* Allocate the structure if it has not already been allocated by a
2271 subclass. */
2272 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
2273 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2274 if (ret == NULL)
2275 return (struct bfd_hash_entry *) ret;
2276
2277 /* Call the allocation method of the superclass. */
2278 ret = ((struct elf32_arm_link_hash_entry *)
2279 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2280 table, string));
2281 if (ret != NULL)
2282 {
2283 ret->relocs_copied = NULL;
2284 ret->tls_type = GOT_UNKNOWN;
2285 ret->plt_thumb_refcount = 0;
2286 ret->plt_maybe_thumb_refcount = 0;
2287 ret->plt_got_offset = -1;
2288 ret->export_glue = NULL;
2289 }
2290
2291 return (struct bfd_hash_entry *) ret;
2292 }
2293
2294 /* Return true if NAME is the name of the relocation section associated
2295 with S. */
2296
2297 static bfd_boolean
2298 reloc_section_p (struct elf32_arm_link_hash_table *htab,
2299 const char *name, asection *s)
2300 {
2301 if (htab->use_rel)
2302 return CONST_STRNEQ (name, ".rel") && strcmp (s->name, name + 4) == 0;
2303 else
2304 return CONST_STRNEQ (name, ".rela") && strcmp (s->name, name + 5) == 0;
2305 }
2306
2307 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2308 shortcuts to them in our hash table. */
2309
2310 static bfd_boolean
2311 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2312 {
2313 struct elf32_arm_link_hash_table *htab;
2314
2315 htab = elf32_arm_hash_table (info);
2316 /* BPABI objects never have a GOT, or associated sections. */
2317 if (htab->symbian_p)
2318 return TRUE;
2319
2320 if (! _bfd_elf_create_got_section (dynobj, info))
2321 return FALSE;
2322
2323 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2324 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2325 if (!htab->sgot || !htab->sgotplt)
2326 abort ();
2327
2328 htab->srelgot = bfd_make_section_with_flags (dynobj,
2329 RELOC_SECTION (htab, ".got"),
2330 (SEC_ALLOC | SEC_LOAD
2331 | SEC_HAS_CONTENTS
2332 | SEC_IN_MEMORY
2333 | SEC_LINKER_CREATED
2334 | SEC_READONLY));
2335 if (htab->srelgot == NULL
2336 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2337 return FALSE;
2338 return TRUE;
2339 }
2340
2341 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2342 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2343 hash table. */
2344
2345 static bfd_boolean
2346 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2347 {
2348 struct elf32_arm_link_hash_table *htab;
2349
2350 htab = elf32_arm_hash_table (info);
2351 if (!htab->sgot && !create_got_section (dynobj, info))
2352 return FALSE;
2353
2354 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2355 return FALSE;
2356
2357 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2358 htab->srelplt = bfd_get_section_by_name (dynobj,
2359 RELOC_SECTION (htab, ".plt"));
2360 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2361 if (!info->shared)
2362 htab->srelbss = bfd_get_section_by_name (dynobj,
2363 RELOC_SECTION (htab, ".bss"));
2364
2365 if (htab->vxworks_p)
2366 {
2367 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2368 return FALSE;
2369
2370 if (info->shared)
2371 {
2372 htab->plt_header_size = 0;
2373 htab->plt_entry_size
2374 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2375 }
2376 else
2377 {
2378 htab->plt_header_size
2379 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2380 htab->plt_entry_size
2381 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2382 }
2383 }
2384
2385 if (!htab->splt
2386 || !htab->srelplt
2387 || !htab->sdynbss
2388 || (!info->shared && !htab->srelbss))
2389 abort ();
2390
2391 return TRUE;
2392 }
2393
2394 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2395
2396 static void
2397 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2398 struct elf_link_hash_entry *dir,
2399 struct elf_link_hash_entry *ind)
2400 {
2401 struct elf32_arm_link_hash_entry *edir, *eind;
2402
2403 edir = (struct elf32_arm_link_hash_entry *) dir;
2404 eind = (struct elf32_arm_link_hash_entry *) ind;
2405
2406 if (eind->relocs_copied != NULL)
2407 {
2408 if (edir->relocs_copied != NULL)
2409 {
2410 struct elf32_arm_relocs_copied **pp;
2411 struct elf32_arm_relocs_copied *p;
2412
2413 /* Add reloc counts against the indirect sym to the direct sym
2414 list. Merge any entries against the same section. */
2415 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2416 {
2417 struct elf32_arm_relocs_copied *q;
2418
2419 for (q = edir->relocs_copied; q != NULL; q = q->next)
2420 if (q->section == p->section)
2421 {
2422 q->pc_count += p->pc_count;
2423 q->count += p->count;
2424 *pp = p->next;
2425 break;
2426 }
2427 if (q == NULL)
2428 pp = &p->next;
2429 }
2430 *pp = edir->relocs_copied;
2431 }
2432
2433 edir->relocs_copied = eind->relocs_copied;
2434 eind->relocs_copied = NULL;
2435 }
2436
2437 if (ind->root.type == bfd_link_hash_indirect)
2438 {
2439 /* Copy over PLT info. */
2440 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2441 eind->plt_thumb_refcount = 0;
2442 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
2443 eind->plt_maybe_thumb_refcount = 0;
2444
2445 if (dir->got.refcount <= 0)
2446 {
2447 edir->tls_type = eind->tls_type;
2448 eind->tls_type = GOT_UNKNOWN;
2449 }
2450 }
2451
2452 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2453 }
2454
2455 /* Create an ARM elf linker hash table. */
2456
2457 static struct bfd_link_hash_table *
2458 elf32_arm_link_hash_table_create (bfd *abfd)
2459 {
2460 struct elf32_arm_link_hash_table *ret;
2461 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2462
2463 ret = bfd_malloc (amt);
2464 if (ret == NULL)
2465 return NULL;
2466
2467 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2468 elf32_arm_link_hash_newfunc,
2469 sizeof (struct elf32_arm_link_hash_entry)))
2470 {
2471 free (ret);
2472 return NULL;
2473 }
2474
2475 ret->sgot = NULL;
2476 ret->sgotplt = NULL;
2477 ret->srelgot = NULL;
2478 ret->splt = NULL;
2479 ret->srelplt = NULL;
2480 ret->sdynbss = NULL;
2481 ret->srelbss = NULL;
2482 ret->srelplt2 = NULL;
2483 ret->thumb_glue_size = 0;
2484 ret->arm_glue_size = 0;
2485 ret->bx_glue_size = 0;
2486 memset (ret->bx_glue_offset, 0, sizeof(ret->bx_glue_offset));
2487 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2488 ret->vfp11_erratum_glue_size = 0;
2489 ret->num_vfp11_fixes = 0;
2490 ret->bfd_of_glue_owner = NULL;
2491 ret->byteswap_code = 0;
2492 ret->target1_is_rel = 0;
2493 ret->target2_reloc = R_ARM_NONE;
2494 #ifdef FOUR_WORD_PLT
2495 ret->plt_header_size = 16;
2496 ret->plt_entry_size = 16;
2497 #else
2498 ret->plt_header_size = 20;
2499 ret->plt_entry_size = 12;
2500 #endif
2501 ret->fix_v4bx = 0;
2502 ret->use_blx = 0;
2503 ret->vxworks_p = 0;
2504 ret->symbian_p = 0;
2505 ret->use_rel = 1;
2506 ret->sym_sec.abfd = NULL;
2507 ret->obfd = abfd;
2508 ret->tls_ldm_got.refcount = 0;
2509
2510 return &ret->root.root;
2511 }
2512
2513 /* Locate the Thumb encoded calling stub for NAME. */
2514
2515 static struct elf_link_hash_entry *
2516 find_thumb_glue (struct bfd_link_info *link_info,
2517 const char *name,
2518 char **error_message)
2519 {
2520 char *tmp_name;
2521 struct elf_link_hash_entry *hash;
2522 struct elf32_arm_link_hash_table *hash_table;
2523
2524 /* We need a pointer to the armelf specific hash table. */
2525 hash_table = elf32_arm_hash_table (link_info);
2526
2527 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2528 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2529
2530 BFD_ASSERT (tmp_name);
2531
2532 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2533
2534 hash = elf_link_hash_lookup
2535 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2536
2537 if (hash == NULL
2538 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
2539 tmp_name, name) == -1)
2540 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
2541
2542 free (tmp_name);
2543
2544 return hash;
2545 }
2546
2547 /* Locate the ARM encoded calling stub for NAME. */
2548
2549 static struct elf_link_hash_entry *
2550 find_arm_glue (struct bfd_link_info *link_info,
2551 const char *name,
2552 char **error_message)
2553 {
2554 char *tmp_name;
2555 struct elf_link_hash_entry *myh;
2556 struct elf32_arm_link_hash_table *hash_table;
2557
2558 /* We need a pointer to the elfarm specific hash table. */
2559 hash_table = elf32_arm_hash_table (link_info);
2560
2561 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2562 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2563
2564 BFD_ASSERT (tmp_name);
2565
2566 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2567
2568 myh = elf_link_hash_lookup
2569 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2570
2571 if (myh == NULL
2572 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
2573 tmp_name, name) == -1)
2574 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
2575
2576 free (tmp_name);
2577
2578 return myh;
2579 }
2580
2581 /* ARM->Thumb glue (static images):
2582
2583 .arm
2584 __func_from_arm:
2585 ldr r12, __func_addr
2586 bx r12
2587 __func_addr:
2588 .word func @ behave as if you saw a ARM_32 reloc.
2589
2590 (v5t static images)
2591 .arm
2592 __func_from_arm:
2593 ldr pc, __func_addr
2594 __func_addr:
2595 .word func @ behave as if you saw a ARM_32 reloc.
2596
2597 (relocatable images)
2598 .arm
2599 __func_from_arm:
2600 ldr r12, __func_offset
2601 add r12, r12, pc
2602 bx r12
2603 __func_offset:
2604 .word func - .
2605 */
2606
2607 #define ARM2THUMB_STATIC_GLUE_SIZE 12
2608 static const insn32 a2t1_ldr_insn = 0xe59fc000;
2609 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
2610 static const insn32 a2t3_func_addr_insn = 0x00000001;
2611
2612 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
2613 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
2614 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
2615
2616 #define ARM2THUMB_PIC_GLUE_SIZE 16
2617 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
2618 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
2619 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
2620
2621 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
2622
2623 .thumb .thumb
2624 .align 2 .align 2
2625 __func_from_thumb: __func_from_thumb:
2626 bx pc push {r6, lr}
2627 nop ldr r6, __func_addr
2628 .arm mov lr, pc
2629 __func_change_to_arm: bx r6
2630 b func .arm
2631 __func_back_to_thumb:
2632 ldmia r13! {r6, lr}
2633 bx lr
2634 __func_addr:
2635 .word func */
2636
2637 #define THUMB2ARM_GLUE_SIZE 8
2638 static const insn16 t2a1_bx_pc_insn = 0x4778;
2639 static const insn16 t2a2_noop_insn = 0x46c0;
2640 static const insn32 t2a3_b_insn = 0xea000000;
2641
2642 #define VFP11_ERRATUM_VENEER_SIZE 8
2643
2644 #define ARM_BX_VENEER_SIZE 12
2645 static const insn32 armbx1_tst_insn = 0xe3100001;
2646 static const insn32 armbx2_moveq_insn = 0x01a0f000;
2647 static const insn32 armbx3_bx_insn = 0xe12fff10;
2648
2649 #ifndef ELFARM_NABI_C_INCLUDED
2650 bfd_boolean
2651 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
2652 {
2653 asection * s;
2654 bfd_byte * foo;
2655 struct elf32_arm_link_hash_table * globals;
2656
2657 globals = elf32_arm_hash_table (info);
2658
2659 BFD_ASSERT (globals != NULL);
2660
2661 if (globals->arm_glue_size != 0)
2662 {
2663 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2664
2665 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2666 ARM2THUMB_GLUE_SECTION_NAME);
2667
2668 BFD_ASSERT (s != NULL);
2669
2670 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
2671
2672 BFD_ASSERT (s->size == globals->arm_glue_size);
2673 s->contents = foo;
2674 }
2675
2676 if (globals->thumb_glue_size != 0)
2677 {
2678 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2679
2680 s = bfd_get_section_by_name
2681 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2682
2683 BFD_ASSERT (s != NULL);
2684
2685 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
2686
2687 BFD_ASSERT (s->size == globals->thumb_glue_size);
2688 s->contents = foo;
2689 }
2690
2691 if (globals->vfp11_erratum_glue_size != 0)
2692 {
2693 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2694
2695 s = bfd_get_section_by_name
2696 (globals->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
2697
2698 BFD_ASSERT (s != NULL);
2699
2700 foo = bfd_alloc (globals->bfd_of_glue_owner,
2701 globals->vfp11_erratum_glue_size);
2702
2703 BFD_ASSERT (s->size == globals->vfp11_erratum_glue_size);
2704 s->contents = foo;
2705 }
2706
2707 if (globals->bx_glue_size != 0)
2708 {
2709 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2710
2711 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2712 ARM_BX_GLUE_SECTION_NAME);
2713
2714 BFD_ASSERT (s != NULL);
2715
2716 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->bx_glue_size);
2717
2718 BFD_ASSERT (s->size == globals->bx_glue_size);
2719 s->contents = foo;
2720 }
2721
2722 return TRUE;
2723 }
2724
2725 /* Allocate space and symbols for calling a Thumb function from Arm mode.
2726 returns the symbol identifying teh stub. */
2727 static struct elf_link_hash_entry *
2728 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
2729 struct elf_link_hash_entry * h)
2730 {
2731 const char * name = h->root.root.string;
2732 asection * s;
2733 char * tmp_name;
2734 struct elf_link_hash_entry * myh;
2735 struct bfd_link_hash_entry * bh;
2736 struct elf32_arm_link_hash_table * globals;
2737 bfd_vma val;
2738 bfd_size_type size;
2739
2740 globals = elf32_arm_hash_table (link_info);
2741
2742 BFD_ASSERT (globals != NULL);
2743 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2744
2745 s = bfd_get_section_by_name
2746 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
2747
2748 BFD_ASSERT (s != NULL);
2749
2750 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2751
2752 BFD_ASSERT (tmp_name);
2753
2754 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2755
2756 myh = elf_link_hash_lookup
2757 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
2758
2759 if (myh != NULL)
2760 {
2761 /* We've already seen this guy. */
2762 free (tmp_name);
2763 return myh;
2764 }
2765
2766 /* The only trick here is using hash_table->arm_glue_size as the value.
2767 Even though the section isn't allocated yet, this is where we will be
2768 putting it. */
2769 bh = NULL;
2770 val = globals->arm_glue_size + 1;
2771 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2772 tmp_name, BSF_GLOBAL, s, val,
2773 NULL, TRUE, FALSE, &bh);
2774
2775 myh = (struct elf_link_hash_entry *) bh;
2776 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2777 myh->forced_local = 1;
2778
2779 free (tmp_name);
2780
2781 if (link_info->shared || globals->root.is_relocatable_executable
2782 || globals->pic_veneer)
2783 size = ARM2THUMB_PIC_GLUE_SIZE;
2784 else if (globals->use_blx)
2785 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
2786 else
2787 size = ARM2THUMB_STATIC_GLUE_SIZE;
2788
2789 s->size += size;
2790 globals->arm_glue_size += size;
2791
2792 return myh;
2793 }
2794
2795 static void
2796 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2797 struct elf_link_hash_entry *h)
2798 {
2799 const char *name = h->root.root.string;
2800 asection *s;
2801 char *tmp_name;
2802 struct elf_link_hash_entry *myh;
2803 struct bfd_link_hash_entry *bh;
2804 struct elf32_arm_link_hash_table *hash_table;
2805 bfd_vma val;
2806
2807 hash_table = elf32_arm_hash_table (link_info);
2808
2809 BFD_ASSERT (hash_table != NULL);
2810 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2811
2812 s = bfd_get_section_by_name
2813 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2814
2815 BFD_ASSERT (s != NULL);
2816
2817 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2818 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2819
2820 BFD_ASSERT (tmp_name);
2821
2822 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2823
2824 myh = elf_link_hash_lookup
2825 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2826
2827 if (myh != NULL)
2828 {
2829 /* We've already seen this guy. */
2830 free (tmp_name);
2831 return;
2832 }
2833
2834 bh = NULL;
2835 val = hash_table->thumb_glue_size + 1;
2836 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2837 tmp_name, BSF_GLOBAL, s, val,
2838 NULL, TRUE, FALSE, &bh);
2839
2840 /* If we mark it 'Thumb', the disassembler will do a better job. */
2841 myh = (struct elf_link_hash_entry *) bh;
2842 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2843 myh->forced_local = 1;
2844
2845 free (tmp_name);
2846
2847 #define CHANGE_TO_ARM "__%s_change_to_arm"
2848 #define BACK_FROM_ARM "__%s_back_from_arm"
2849
2850 /* Allocate another symbol to mark where we switch to Arm mode. */
2851 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2852 + strlen (CHANGE_TO_ARM) + 1);
2853
2854 BFD_ASSERT (tmp_name);
2855
2856 sprintf (tmp_name, CHANGE_TO_ARM, name);
2857
2858 bh = NULL;
2859 val = hash_table->thumb_glue_size + 4,
2860 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2861 tmp_name, BSF_LOCAL, s, val,
2862 NULL, TRUE, FALSE, &bh);
2863
2864 free (tmp_name);
2865
2866 s->size += THUMB2ARM_GLUE_SIZE;
2867 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2868
2869 return;
2870 }
2871
2872
2873 /* Allocate space for ARMv4 BX veneers. */
2874
2875 static void
2876 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
2877 {
2878 asection * s;
2879 struct elf32_arm_link_hash_table *globals;
2880 char *tmp_name;
2881 struct elf_link_hash_entry *myh;
2882 struct bfd_link_hash_entry *bh;
2883 bfd_vma val;
2884
2885 /* BX PC does not need a veneer. */
2886 if (reg == 15)
2887 return;
2888
2889 globals = elf32_arm_hash_table (link_info);
2890
2891 BFD_ASSERT (globals != NULL);
2892 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2893
2894 /* Check if this veneer has already been allocated. */
2895 if (globals->bx_glue_offset[reg])
2896 return;
2897
2898 s = bfd_get_section_by_name
2899 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
2900
2901 BFD_ASSERT (s != NULL);
2902
2903 /* Add symbol for veneer. */
2904 tmp_name = bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
2905
2906 BFD_ASSERT (tmp_name);
2907
2908 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
2909
2910 myh = elf_link_hash_lookup
2911 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
2912
2913 BFD_ASSERT (myh == NULL);
2914
2915 bh = NULL;
2916 val = globals->bx_glue_size;
2917 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2918 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
2919 NULL, TRUE, FALSE, &bh);
2920
2921 myh = (struct elf_link_hash_entry *) bh;
2922 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2923 myh->forced_local = 1;
2924
2925 s->size += ARM_BX_VENEER_SIZE;
2926 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
2927 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
2928 }
2929
2930
2931 /* Add an entry to the code/data map for section SEC. */
2932
2933 static void
2934 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
2935 {
2936 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
2937 unsigned int newidx;
2938
2939 if (sec_data->map == NULL)
2940 {
2941 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
2942 sec_data->mapcount = 0;
2943 sec_data->mapsize = 1;
2944 }
2945
2946 newidx = sec_data->mapcount++;
2947
2948 if (sec_data->mapcount > sec_data->mapsize)
2949 {
2950 sec_data->mapsize *= 2;
2951 sec_data->map = bfd_realloc_or_free (sec_data->map, sec_data->mapsize
2952 * sizeof (elf32_arm_section_map));
2953 }
2954
2955 if (sec_data->map)
2956 {
2957 sec_data->map[newidx].vma = vma;
2958 sec_data->map[newidx].type = type;
2959 }
2960 }
2961
2962
2963 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
2964 veneers are handled for now. */
2965
2966 static bfd_vma
2967 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
2968 elf32_vfp11_erratum_list *branch,
2969 bfd *branch_bfd,
2970 asection *branch_sec,
2971 unsigned int offset)
2972 {
2973 asection *s;
2974 struct elf32_arm_link_hash_table *hash_table;
2975 char *tmp_name;
2976 struct elf_link_hash_entry *myh;
2977 struct bfd_link_hash_entry *bh;
2978 bfd_vma val;
2979 struct _arm_elf_section_data *sec_data;
2980 int errcount;
2981 elf32_vfp11_erratum_list *newerr;
2982
2983 hash_table = elf32_arm_hash_table (link_info);
2984
2985 BFD_ASSERT (hash_table != NULL);
2986 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2987
2988 s = bfd_get_section_by_name
2989 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
2990
2991 sec_data = elf32_arm_section_data (s);
2992
2993 BFD_ASSERT (s != NULL);
2994
2995 tmp_name = bfd_malloc ((bfd_size_type) strlen
2996 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
2997
2998 BFD_ASSERT (tmp_name);
2999
3000 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
3001 hash_table->num_vfp11_fixes);
3002
3003 myh = elf_link_hash_lookup
3004 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
3005
3006 BFD_ASSERT (myh == NULL);
3007
3008 bh = NULL;
3009 val = hash_table->vfp11_erratum_glue_size;
3010 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
3011 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
3012 NULL, TRUE, FALSE, &bh);
3013
3014 myh = (struct elf_link_hash_entry *) bh;
3015 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
3016 myh->forced_local = 1;
3017
3018 /* Link veneer back to calling location. */
3019 errcount = ++(sec_data->erratumcount);
3020 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
3021
3022 newerr->type = VFP11_ERRATUM_ARM_VENEER;
3023 newerr->vma = -1;
3024 newerr->u.v.branch = branch;
3025 newerr->u.v.id = hash_table->num_vfp11_fixes;
3026 branch->u.b.veneer = newerr;
3027
3028 newerr->next = sec_data->erratumlist;
3029 sec_data->erratumlist = newerr;
3030
3031 /* A symbol for the return from the veneer. */
3032 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
3033 hash_table->num_vfp11_fixes);
3034
3035 myh = elf_link_hash_lookup
3036 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
3037
3038 if (myh != NULL)
3039 abort ();
3040
3041 bh = NULL;
3042 val = offset + 4;
3043 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
3044 branch_sec, val, NULL, TRUE, FALSE, &bh);
3045
3046 myh = (struct elf_link_hash_entry *) bh;
3047 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
3048 myh->forced_local = 1;
3049
3050 free (tmp_name);
3051
3052 /* Generate a mapping symbol for the veneer section, and explicitly add an
3053 entry for that symbol to the code/data map for the section. */
3054 if (hash_table->vfp11_erratum_glue_size == 0)
3055 {
3056 bh = NULL;
3057 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
3058 ever requires this erratum fix. */
3059 _bfd_generic_link_add_one_symbol (link_info,
3060 hash_table->bfd_of_glue_owner, "$a",
3061 BSF_LOCAL, s, 0, NULL,
3062 TRUE, FALSE, &bh);
3063
3064 myh = (struct elf_link_hash_entry *) bh;
3065 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
3066 myh->forced_local = 1;
3067
3068 /* The elf32_arm_init_maps function only cares about symbols from input
3069 BFDs. We must make a note of this generated mapping symbol
3070 ourselves so that code byteswapping works properly in
3071 elf32_arm_write_section. */
3072 elf32_arm_section_map_add (s, 'a', 0);
3073 }
3074
3075 s->size += VFP11_ERRATUM_VENEER_SIZE;
3076 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
3077 hash_table->num_vfp11_fixes++;
3078
3079 /* The offset of the veneer. */
3080 return val;
3081 }
3082
3083 /* Add the glue sections to ABFD. This function is called from the
3084 linker scripts in ld/emultempl/{armelf}.em. */
3085
3086 bfd_boolean
3087 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
3088 struct bfd_link_info *info)
3089 {
3090 flagword flags;
3091 asection *sec;
3092
3093 /* If we are only performing a partial
3094 link do not bother adding the glue. */
3095 if (info->relocatable)
3096 return TRUE;
3097
3098 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
3099
3100 if (sec == NULL)
3101 {
3102 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
3103 will prevent elf_link_input_bfd() from processing the contents
3104 of this section. */
3105 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3106 | SEC_CODE | SEC_READONLY);
3107
3108 sec = bfd_make_section_with_flags (abfd,
3109 ARM2THUMB_GLUE_SECTION_NAME,
3110 flags);
3111
3112 if (sec == NULL
3113 || !bfd_set_section_alignment (abfd, sec, 2))
3114 return FALSE;
3115
3116 /* Set the gc mark to prevent the section from being removed by garbage
3117 collection, despite the fact that no relocs refer to this section. */
3118 sec->gc_mark = 1;
3119 }
3120
3121 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
3122
3123 if (sec == NULL)
3124 {
3125 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3126 | SEC_CODE | SEC_READONLY);
3127
3128 sec = bfd_make_section_with_flags (abfd,
3129 THUMB2ARM_GLUE_SECTION_NAME,
3130 flags);
3131
3132 if (sec == NULL
3133 || !bfd_set_section_alignment (abfd, sec, 2))
3134 return FALSE;
3135
3136 sec->gc_mark = 1;
3137 }
3138
3139 sec = bfd_get_section_by_name (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME);
3140
3141 if (sec == NULL)
3142 {
3143 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3144 | SEC_CODE | SEC_READONLY);
3145
3146 sec = bfd_make_section_with_flags (abfd,
3147 VFP11_ERRATUM_VENEER_SECTION_NAME,
3148 flags);
3149
3150 if (sec == NULL
3151 || !bfd_set_section_alignment (abfd, sec, 2))
3152 return FALSE;
3153
3154 sec->gc_mark = 1;
3155 }
3156
3157 sec = bfd_get_section_by_name (abfd, ARM_BX_GLUE_SECTION_NAME);
3158
3159 if (sec == NULL)
3160 {
3161 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3162 | SEC_CODE | SEC_READONLY);
3163
3164 sec = bfd_make_section_with_flags (abfd,
3165 ARM_BX_GLUE_SECTION_NAME,
3166 flags);
3167
3168 if (sec == NULL
3169 || !bfd_set_section_alignment (abfd, sec, 2))
3170 return FALSE;
3171
3172 sec->gc_mark = 1;
3173 }
3174
3175 return TRUE;
3176 }
3177
3178 /* Select a BFD to be used to hold the sections used by the glue code.
3179 This function is called from the linker scripts in ld/emultempl/
3180 {armelf/pe}.em */
3181
3182 bfd_boolean
3183 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
3184 {
3185 struct elf32_arm_link_hash_table *globals;
3186
3187 /* If we are only performing a partial link
3188 do not bother getting a bfd to hold the glue. */
3189 if (info->relocatable)
3190 return TRUE;
3191
3192 /* Make sure we don't attach the glue sections to a dynamic object. */
3193 BFD_ASSERT (!(abfd->flags & DYNAMIC));
3194
3195 globals = elf32_arm_hash_table (info);
3196
3197 BFD_ASSERT (globals != NULL);
3198
3199 if (globals->bfd_of_glue_owner != NULL)
3200 return TRUE;
3201
3202 /* Save the bfd for later use. */
3203 globals->bfd_of_glue_owner = abfd;
3204
3205 return TRUE;
3206 }
3207
3208 static void check_use_blx(struct elf32_arm_link_hash_table *globals)
3209 {
3210 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3211 Tag_CPU_arch) > 2)
3212 globals->use_blx = 1;
3213 }
3214
3215 bfd_boolean
3216 bfd_elf32_arm_process_before_allocation (bfd *abfd,
3217 struct bfd_link_info *link_info)
3218 {
3219 Elf_Internal_Shdr *symtab_hdr;
3220 Elf_Internal_Rela *internal_relocs = NULL;
3221 Elf_Internal_Rela *irel, *irelend;
3222 bfd_byte *contents = NULL;
3223
3224 asection *sec;
3225 struct elf32_arm_link_hash_table *globals;
3226
3227 /* If we are only performing a partial link do not bother
3228 to construct any glue. */
3229 if (link_info->relocatable)
3230 return TRUE;
3231
3232 /* Here we have a bfd that is to be included on the link. We have a
3233 hook to do reloc rummaging, before section sizes are nailed down. */
3234 globals = elf32_arm_hash_table (link_info);
3235
3236 BFD_ASSERT (globals != NULL);
3237
3238 check_use_blx (globals);
3239
3240 if (globals->byteswap_code && !bfd_big_endian (abfd))
3241 {
3242 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
3243 abfd);
3244 return FALSE;
3245 }
3246
3247 /* PR 5398: If we have not decided to include any loadable sections in
3248 the output then we will not have a glue owner bfd. This is OK, it
3249 just means that there is nothing else for us to do here. */
3250 if (globals->bfd_of_glue_owner == NULL)
3251 return TRUE;
3252
3253 /* Rummage around all the relocs and map the glue vectors. */
3254 sec = abfd->sections;
3255
3256 if (sec == NULL)
3257 return TRUE;
3258
3259 for (; sec != NULL; sec = sec->next)
3260 {
3261 if (sec->reloc_count == 0)
3262 continue;
3263
3264 if ((sec->flags & SEC_EXCLUDE) != 0)
3265 continue;
3266
3267 symtab_hdr = & elf_symtab_hdr (abfd);
3268
3269 /* Load the relocs. */
3270 internal_relocs
3271 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
3272 (Elf_Internal_Rela *) NULL, FALSE);
3273
3274 if (internal_relocs == NULL)
3275 goto error_return;
3276
3277 irelend = internal_relocs + sec->reloc_count;
3278 for (irel = internal_relocs; irel < irelend; irel++)
3279 {
3280 long r_type;
3281 unsigned long r_index;
3282
3283 struct elf_link_hash_entry *h;
3284
3285 r_type = ELF32_R_TYPE (irel->r_info);
3286 r_index = ELF32_R_SYM (irel->r_info);
3287
3288 /* These are the only relocation types we care about. */
3289 if ( r_type != R_ARM_PC24
3290 && r_type != R_ARM_PLT32
3291 && r_type != R_ARM_CALL
3292 && r_type != R_ARM_JUMP24
3293 && r_type != R_ARM_THM_CALL
3294 && r_type != R_ARM_THM_JUMP24
3295 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
3296 continue;
3297
3298 /* Get the section contents if we haven't done so already. */
3299 if (contents == NULL)
3300 {
3301 /* Get cached copy if it exists. */
3302 if (elf_section_data (sec)->this_hdr.contents != NULL)
3303 contents = elf_section_data (sec)->this_hdr.contents;
3304 else
3305 {
3306 /* Go get them off disk. */
3307 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3308 goto error_return;
3309 }
3310 }
3311
3312 if (r_type == R_ARM_V4BX)
3313 {
3314 int reg;
3315
3316 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
3317 record_arm_bx_glue (link_info, reg);
3318 continue;
3319 }
3320
3321 /* If the relocation is not against a symbol it cannot concern us. */
3322 h = NULL;
3323
3324 /* We don't care about local symbols. */
3325 if (r_index < symtab_hdr->sh_info)
3326 continue;
3327
3328 /* This is an external symbol. */
3329 r_index -= symtab_hdr->sh_info;
3330 h = (struct elf_link_hash_entry *)
3331 elf_sym_hashes (abfd)[r_index];
3332
3333 /* If the relocation is against a static symbol it must be within
3334 the current section and so cannot be a cross ARM/Thumb relocation. */
3335 if (h == NULL)
3336 continue;
3337
3338 /* If the call will go through a PLT entry then we do not need
3339 glue. */
3340 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
3341 continue;
3342
3343 switch (r_type)
3344 {
3345 case R_ARM_PC24:
3346 case R_ARM_PLT32:
3347 case R_ARM_CALL:
3348 case R_ARM_JUMP24:
3349 /* This one is a call from arm code. We need to look up
3350 the target of the call. If it is a thumb target, we
3351 insert glue. */
3352 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
3353 && !(r_type == R_ARM_CALL && globals->use_blx))
3354 record_arm_to_thumb_glue (link_info, h);
3355 break;
3356
3357 case R_ARM_THM_CALL:
3358 case R_ARM_THM_JUMP24:
3359 /* This one is a call from thumb code. We look
3360 up the target of the call. If it is not a thumb
3361 target, we insert glue. */
3362 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC
3363 && !(globals->use_blx && r_type == R_ARM_THM_CALL)
3364 && h->root.type != bfd_link_hash_undefweak)
3365 record_thumb_to_arm_glue (link_info, h);
3366 break;
3367
3368 default:
3369 abort ();
3370 }
3371 }
3372
3373 if (contents != NULL
3374 && elf_section_data (sec)->this_hdr.contents != contents)
3375 free (contents);
3376 contents = NULL;
3377
3378 if (internal_relocs != NULL
3379 && elf_section_data (sec)->relocs != internal_relocs)
3380 free (internal_relocs);
3381 internal_relocs = NULL;
3382 }
3383
3384 return TRUE;
3385
3386 error_return:
3387 if (contents != NULL
3388 && elf_section_data (sec)->this_hdr.contents != contents)
3389 free (contents);
3390 if (internal_relocs != NULL
3391 && elf_section_data (sec)->relocs != internal_relocs)
3392 free (internal_relocs);
3393
3394 return FALSE;
3395 }
3396 #endif
3397
3398
3399 /* Initialise maps of ARM/Thumb/data for input BFDs. */
3400
3401 void
3402 bfd_elf32_arm_init_maps (bfd *abfd)
3403 {
3404 Elf_Internal_Sym *isymbuf;
3405 Elf_Internal_Shdr *hdr;
3406 unsigned int i, localsyms;
3407
3408 if ((abfd->flags & DYNAMIC) != 0)
3409 return;
3410
3411 hdr = & elf_symtab_hdr (abfd);
3412 localsyms = hdr->sh_info;
3413
3414 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3415 should contain the number of local symbols, which should come before any
3416 global symbols. Mapping symbols are always local. */
3417 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
3418 NULL);
3419
3420 /* No internal symbols read? Skip this BFD. */
3421 if (isymbuf == NULL)
3422 return;
3423
3424 for (i = 0; i < localsyms; i++)
3425 {
3426 Elf_Internal_Sym *isym = &isymbuf[i];
3427 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3428 const char *name;
3429
3430 if (sec != NULL
3431 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3432 {
3433 name = bfd_elf_string_from_elf_section (abfd,
3434 hdr->sh_link, isym->st_name);
3435
3436 if (bfd_is_arm_special_symbol_name (name,
3437 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
3438 elf32_arm_section_map_add (sec, name[1], isym->st_value);
3439 }
3440 }
3441 }
3442
3443
3444 void
3445 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
3446 {
3447 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3448 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
3449
3450 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
3451 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
3452 {
3453 switch (globals->vfp11_fix)
3454 {
3455 case BFD_ARM_VFP11_FIX_DEFAULT:
3456 case BFD_ARM_VFP11_FIX_NONE:
3457 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3458 break;
3459
3460 default:
3461 /* Give a warning, but do as the user requests anyway. */
3462 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
3463 "workaround is not necessary for target architecture"), obfd);
3464 }
3465 }
3466 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
3467 /* For earlier architectures, we might need the workaround, but do not
3468 enable it by default. If users is running with broken hardware, they
3469 must enable the erratum fix explicitly. */
3470 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3471 }
3472
3473
3474 enum bfd_arm_vfp11_pipe {
3475 VFP11_FMAC,
3476 VFP11_LS,
3477 VFP11_DS,
3478 VFP11_BAD
3479 };
3480
3481 /* Return a VFP register number. This is encoded as RX:X for single-precision
3482 registers, or X:RX for double-precision registers, where RX is the group of
3483 four bits in the instruction encoding and X is the single extension bit.
3484 RX and X fields are specified using their lowest (starting) bit. The return
3485 value is:
3486
3487 0...31: single-precision registers s0...s31
3488 32...63: double-precision registers d0...d31.
3489
3490 Although X should be zero for VFP11 (encoding d0...d15 only), we might
3491 encounter VFP3 instructions, so we allow the full range for DP registers. */
3492
3493 static unsigned int
3494 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
3495 unsigned int x)
3496 {
3497 if (is_double)
3498 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
3499 else
3500 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
3501 }
3502
3503 /* Set bits in *WMASK according to a register number REG as encoded by
3504 bfd_arm_vfp11_regno(). Ignore d16-d31. */
3505
3506 static void
3507 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
3508 {
3509 if (reg < 32)
3510 *wmask |= 1 << reg;
3511 else if (reg < 48)
3512 *wmask |= 3 << ((reg - 32) * 2);
3513 }
3514
3515 /* Return TRUE if WMASK overwrites anything in REGS. */
3516
3517 static bfd_boolean
3518 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
3519 {
3520 int i;
3521
3522 for (i = 0; i < numregs; i++)
3523 {
3524 unsigned int reg = regs[i];
3525
3526 if (reg < 32 && (wmask & (1 << reg)) != 0)
3527 return TRUE;
3528
3529 reg -= 32;
3530
3531 if (reg >= 16)
3532 continue;
3533
3534 if ((wmask & (3 << (reg * 2))) != 0)
3535 return TRUE;
3536 }
3537
3538 return FALSE;
3539 }
3540
3541 /* In this function, we're interested in two things: finding input registers
3542 for VFP data-processing instructions, and finding the set of registers which
3543 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
3544 hold the written set, so FLDM etc. are easy to deal with (we're only
3545 interested in 32 SP registers or 16 dp registers, due to the VFP version
3546 implemented by the chip in question). DP registers are marked by setting
3547 both SP registers in the write mask). */
3548
3549 static enum bfd_arm_vfp11_pipe
3550 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
3551 int *numregs)
3552 {
3553 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
3554 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
3555
3556 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
3557 {
3558 unsigned int pqrs;
3559 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3560 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3561
3562 pqrs = ((insn & 0x00800000) >> 20)
3563 | ((insn & 0x00300000) >> 19)
3564 | ((insn & 0x00000040) >> 6);
3565
3566 switch (pqrs)
3567 {
3568 case 0: /* fmac[sd]. */
3569 case 1: /* fnmac[sd]. */
3570 case 2: /* fmsc[sd]. */
3571 case 3: /* fnmsc[sd]. */
3572 pipe = VFP11_FMAC;
3573 bfd_arm_vfp11_write_mask (destmask, fd);
3574 regs[0] = fd;
3575 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3576 regs[2] = fm;
3577 *numregs = 3;
3578 break;
3579
3580 case 4: /* fmul[sd]. */
3581 case 5: /* fnmul[sd]. */
3582 case 6: /* fadd[sd]. */
3583 case 7: /* fsub[sd]. */
3584 pipe = VFP11_FMAC;
3585 goto vfp_binop;
3586
3587 case 8: /* fdiv[sd]. */
3588 pipe = VFP11_DS;
3589 vfp_binop:
3590 bfd_arm_vfp11_write_mask (destmask, fd);
3591 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3592 regs[1] = fm;
3593 *numregs = 2;
3594 break;
3595
3596 case 15: /* extended opcode. */
3597 {
3598 unsigned int extn = ((insn >> 15) & 0x1e)
3599 | ((insn >> 7) & 1);
3600
3601 switch (extn)
3602 {
3603 case 0: /* fcpy[sd]. */
3604 case 1: /* fabs[sd]. */
3605 case 2: /* fneg[sd]. */
3606 case 8: /* fcmp[sd]. */
3607 case 9: /* fcmpe[sd]. */
3608 case 10: /* fcmpz[sd]. */
3609 case 11: /* fcmpez[sd]. */
3610 case 16: /* fuito[sd]. */
3611 case 17: /* fsito[sd]. */
3612 case 24: /* ftoui[sd]. */
3613 case 25: /* ftouiz[sd]. */
3614 case 26: /* ftosi[sd]. */
3615 case 27: /* ftosiz[sd]. */
3616 /* These instructions will not bounce due to underflow. */
3617 *numregs = 0;
3618 pipe = VFP11_FMAC;
3619 break;
3620
3621 case 3: /* fsqrt[sd]. */
3622 /* fsqrt cannot underflow, but it can (perhaps) overwrite
3623 registers to cause the erratum in previous instructions. */
3624 bfd_arm_vfp11_write_mask (destmask, fd);
3625 pipe = VFP11_DS;
3626 break;
3627
3628 case 15: /* fcvt{ds,sd}. */
3629 {
3630 int rnum = 0;
3631
3632 bfd_arm_vfp11_write_mask (destmask, fd);
3633
3634 /* Only FCVTSD can underflow. */
3635 if ((insn & 0x100) != 0)
3636 regs[rnum++] = fm;
3637
3638 *numregs = rnum;
3639
3640 pipe = VFP11_FMAC;
3641 }
3642 break;
3643
3644 default:
3645 return VFP11_BAD;
3646 }
3647 }
3648 break;
3649
3650 default:
3651 return VFP11_BAD;
3652 }
3653 }
3654 /* Two-register transfer. */
3655 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
3656 {
3657 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3658
3659 if ((insn & 0x100000) == 0)
3660 {
3661 if (is_double)
3662 bfd_arm_vfp11_write_mask (destmask, fm);
3663 else
3664 {
3665 bfd_arm_vfp11_write_mask (destmask, fm);
3666 bfd_arm_vfp11_write_mask (destmask, fm + 1);
3667 }
3668 }
3669
3670 pipe = VFP11_LS;
3671 }
3672 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
3673 {
3674 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3675 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
3676
3677 switch (puw)
3678 {
3679 case 0: /* Two-reg transfer. We should catch these above. */
3680 abort ();
3681
3682 case 2: /* fldm[sdx]. */
3683 case 3:
3684 case 5:
3685 {
3686 unsigned int i, offset = insn & 0xff;
3687
3688 if (is_double)
3689 offset >>= 1;
3690
3691 for (i = fd; i < fd + offset; i++)
3692 bfd_arm_vfp11_write_mask (destmask, i);
3693 }
3694 break;
3695
3696 case 4: /* fld[sd]. */
3697 case 6:
3698 bfd_arm_vfp11_write_mask (destmask, fd);
3699 break;
3700
3701 default:
3702 return VFP11_BAD;
3703 }
3704
3705 pipe = VFP11_LS;
3706 }
3707 /* Single-register transfer. Note L==0. */
3708 else if ((insn & 0x0f100e10) == 0x0e000a10)
3709 {
3710 unsigned int opcode = (insn >> 21) & 7;
3711 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
3712
3713 switch (opcode)
3714 {
3715 case 0: /* fmsr/fmdlr. */
3716 case 1: /* fmdhr. */
3717 /* Mark fmdhr and fmdlr as writing to the whole of the DP
3718 destination register. I don't know if this is exactly right,
3719 but it is the conservative choice. */
3720 bfd_arm_vfp11_write_mask (destmask, fn);
3721 break;
3722
3723 case 7: /* fmxr. */
3724 break;
3725 }
3726
3727 pipe = VFP11_LS;
3728 }
3729
3730 return pipe;
3731 }
3732
3733
3734 static int elf32_arm_compare_mapping (const void * a, const void * b);
3735
3736
3737 /* Look for potentially-troublesome code sequences which might trigger the
3738 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
3739 (available from ARM) for details of the erratum. A short version is
3740 described in ld.texinfo. */
3741
3742 bfd_boolean
3743 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
3744 {
3745 asection *sec;
3746 bfd_byte *contents = NULL;
3747 int state = 0;
3748 int regs[3], numregs = 0;
3749 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3750 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
3751
3752 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
3753 The states transition as follows:
3754
3755 0 -> 1 (vector) or 0 -> 2 (scalar)
3756 A VFP FMAC-pipeline instruction has been seen. Fill
3757 regs[0]..regs[numregs-1] with its input operands. Remember this
3758 instruction in 'first_fmac'.
3759
3760 1 -> 2
3761 Any instruction, except for a VFP instruction which overwrites
3762 regs[*].
3763
3764 1 -> 3 [ -> 0 ] or
3765 2 -> 3 [ -> 0 ]
3766 A VFP instruction has been seen which overwrites any of regs[*].
3767 We must make a veneer! Reset state to 0 before examining next
3768 instruction.
3769
3770 2 -> 0
3771 If we fail to match anything in state 2, reset to state 0 and reset
3772 the instruction pointer to the instruction after 'first_fmac'.
3773
3774 If the VFP11 vector mode is in use, there must be at least two unrelated
3775 instructions between anti-dependent VFP11 instructions to properly avoid
3776 triggering the erratum, hence the use of the extra state 1.
3777 */
3778
3779 /* If we are only performing a partial link do not bother
3780 to construct any glue. */
3781 if (link_info->relocatable)
3782 return TRUE;
3783
3784 /* Skip if this bfd does not correspond to an ELF image. */
3785 if (! is_arm_elf (abfd))
3786 return TRUE;
3787
3788 /* We should have chosen a fix type by the time we get here. */
3789 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
3790
3791 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
3792 return TRUE;
3793
3794 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3795 {
3796 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
3797 struct _arm_elf_section_data *sec_data;
3798
3799 /* If we don't have executable progbits, we're not interested in this
3800 section. Also skip if section is to be excluded. */
3801 if (elf_section_type (sec) != SHT_PROGBITS
3802 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
3803 || (sec->flags & SEC_EXCLUDE) != 0
3804 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
3805 continue;
3806
3807 sec_data = elf32_arm_section_data (sec);
3808
3809 if (sec_data->mapcount == 0)
3810 continue;
3811
3812 if (elf_section_data (sec)->this_hdr.contents != NULL)
3813 contents = elf_section_data (sec)->this_hdr.contents;
3814 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3815 goto error_return;
3816
3817 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
3818 elf32_arm_compare_mapping);
3819
3820 for (span = 0; span < sec_data->mapcount; span++)
3821 {
3822 unsigned int span_start = sec_data->map[span].vma;
3823 unsigned int span_end = (span == sec_data->mapcount - 1)
3824 ? sec->size : sec_data->map[span + 1].vma;
3825 char span_type = sec_data->map[span].type;
3826
3827 /* FIXME: Only ARM mode is supported at present. We may need to
3828 support Thumb-2 mode also at some point. */
3829 if (span_type != 'a')
3830 continue;
3831
3832 for (i = span_start; i < span_end;)
3833 {
3834 unsigned int next_i = i + 4;
3835 unsigned int insn = bfd_big_endian (abfd)
3836 ? (contents[i] << 24)
3837 | (contents[i + 1] << 16)
3838 | (contents[i + 2] << 8)
3839 | contents[i + 3]
3840 : (contents[i + 3] << 24)
3841 | (contents[i + 2] << 16)
3842 | (contents[i + 1] << 8)
3843 | contents[i];
3844 unsigned int writemask = 0;
3845 enum bfd_arm_vfp11_pipe pipe;
3846
3847 switch (state)
3848 {
3849 case 0:
3850 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
3851 &numregs);
3852 /* I'm assuming the VFP11 erratum can trigger with denorm
3853 operands on either the FMAC or the DS pipeline. This might
3854 lead to slightly overenthusiastic veneer insertion. */
3855 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
3856 {
3857 state = use_vector ? 1 : 2;
3858 first_fmac = i;
3859 veneer_of_insn = insn;
3860 }
3861 break;
3862
3863 case 1:
3864 {
3865 int other_regs[3], other_numregs;
3866 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3867 other_regs,
3868 &other_numregs);
3869 if (pipe != VFP11_BAD
3870 && bfd_arm_vfp11_antidependency (writemask, regs,
3871 numregs))
3872 state = 3;
3873 else
3874 state = 2;
3875 }
3876 break;
3877
3878 case 2:
3879 {
3880 int other_regs[3], other_numregs;
3881 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3882 other_regs,
3883 &other_numregs);
3884 if (pipe != VFP11_BAD
3885 && bfd_arm_vfp11_antidependency (writemask, regs,
3886 numregs))
3887 state = 3;
3888 else
3889 {
3890 state = 0;
3891 next_i = first_fmac + 4;
3892 }
3893 }
3894 break;
3895
3896 case 3:
3897 abort (); /* Should be unreachable. */
3898 }
3899
3900 if (state == 3)
3901 {
3902 elf32_vfp11_erratum_list *newerr
3903 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
3904 int errcount;
3905
3906 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
3907
3908 newerr->u.b.vfp_insn = veneer_of_insn;
3909
3910 switch (span_type)
3911 {
3912 case 'a':
3913 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
3914 break;
3915
3916 default:
3917 abort ();
3918 }
3919
3920 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
3921 first_fmac);
3922
3923 newerr->vma = -1;
3924
3925 newerr->next = sec_data->erratumlist;
3926 sec_data->erratumlist = newerr;
3927
3928 state = 0;
3929 }
3930
3931 i = next_i;
3932 }
3933 }
3934
3935 if (contents != NULL
3936 && elf_section_data (sec)->this_hdr.contents != contents)
3937 free (contents);
3938 contents = NULL;
3939 }
3940
3941 return TRUE;
3942
3943 error_return:
3944 if (contents != NULL
3945 && elf_section_data (sec)->this_hdr.contents != contents)
3946 free (contents);
3947
3948 return FALSE;
3949 }
3950
3951 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
3952 after sections have been laid out, using specially-named symbols. */
3953
3954 void
3955 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
3956 struct bfd_link_info *link_info)
3957 {
3958 asection *sec;
3959 struct elf32_arm_link_hash_table *globals;
3960 char *tmp_name;
3961
3962 if (link_info->relocatable)
3963 return;
3964
3965 /* Skip if this bfd does not correspond to an ELF image. */
3966 if (! is_arm_elf (abfd))
3967 return;
3968
3969 globals = elf32_arm_hash_table (link_info);
3970
3971 tmp_name = bfd_malloc ((bfd_size_type) strlen
3972 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
3973
3974 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3975 {
3976 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
3977 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
3978
3979 for (; errnode != NULL; errnode = errnode->next)
3980 {
3981 struct elf_link_hash_entry *myh;
3982 bfd_vma vma;
3983
3984 switch (errnode->type)
3985 {
3986 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
3987 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
3988 /* Find veneer symbol. */
3989 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
3990 errnode->u.b.veneer->u.v.id);
3991
3992 myh = elf_link_hash_lookup
3993 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
3994
3995 if (myh == NULL)
3996 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
3997 "`%s'"), abfd, tmp_name);
3998
3999 vma = myh->root.u.def.section->output_section->vma
4000 + myh->root.u.def.section->output_offset
4001 + myh->root.u.def.value;
4002
4003 errnode->u.b.veneer->vma = vma;
4004 break;
4005
4006 case VFP11_ERRATUM_ARM_VENEER:
4007 case VFP11_ERRATUM_THUMB_VENEER:
4008 /* Find return location. */
4009 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
4010 errnode->u.v.id);
4011
4012 myh = elf_link_hash_lookup
4013 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
4014
4015 if (myh == NULL)
4016 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
4017 "`%s'"), abfd, tmp_name);
4018
4019 vma = myh->root.u.def.section->output_section->vma
4020 + myh->root.u.def.section->output_offset
4021 + myh->root.u.def.value;
4022
4023 errnode->u.v.branch->vma = vma;
4024 break;
4025
4026 default:
4027 abort ();
4028 }
4029 }
4030 }
4031
4032 free (tmp_name);
4033 }
4034
4035
4036 /* Set target relocation values needed during linking. */
4037
4038 void
4039 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
4040 struct bfd_link_info *link_info,
4041 int target1_is_rel,
4042 char * target2_type,
4043 int fix_v4bx,
4044 int use_blx,
4045 bfd_arm_vfp11_fix vfp11_fix,
4046 int no_enum_warn, int pic_veneer)
4047 {
4048 struct elf32_arm_link_hash_table *globals;
4049
4050 globals = elf32_arm_hash_table (link_info);
4051
4052 globals->target1_is_rel = target1_is_rel;
4053 if (strcmp (target2_type, "rel") == 0)
4054 globals->target2_reloc = R_ARM_REL32;
4055 else if (strcmp (target2_type, "abs") == 0)
4056 globals->target2_reloc = R_ARM_ABS32;
4057 else if (strcmp (target2_type, "got-rel") == 0)
4058 globals->target2_reloc = R_ARM_GOT_PREL;
4059 else
4060 {
4061 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
4062 target2_type);
4063 }
4064 globals->fix_v4bx = fix_v4bx;
4065 globals->use_blx |= use_blx;
4066 globals->vfp11_fix = vfp11_fix;
4067 globals->pic_veneer = pic_veneer;
4068
4069 BFD_ASSERT (is_arm_elf (output_bfd));
4070 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
4071 }
4072
4073 /* Replace the target offset of a Thumb bl or b.w instruction. */
4074
4075 static void
4076 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
4077 {
4078 bfd_vma upper;
4079 bfd_vma lower;
4080 int reloc_sign;
4081
4082 BFD_ASSERT ((offset & 1) == 0);
4083
4084 upper = bfd_get_16 (abfd, insn);
4085 lower = bfd_get_16 (abfd, insn + 2);
4086 reloc_sign = (offset < 0) ? 1 : 0;
4087 upper = (upper & ~(bfd_vma) 0x7ff)
4088 | ((offset >> 12) & 0x3ff)
4089 | (reloc_sign << 10);
4090 lower = (lower & ~(bfd_vma) 0x2fff)
4091 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
4092 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
4093 | ((offset >> 1) & 0x7ff);
4094 bfd_put_16 (abfd, upper, insn);
4095 bfd_put_16 (abfd, lower, insn + 2);
4096 }
4097
4098
4099 /* Store an Arm insn into an output section not processed by
4100 elf32_arm_write_section. */
4101
4102 static void
4103 put_arm_insn (struct elf32_arm_link_hash_table *htab,
4104 bfd * output_bfd, bfd_vma val, void * ptr)
4105 {
4106 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4107 bfd_putl32 (val, ptr);
4108 else
4109 bfd_putb32 (val, ptr);
4110 }
4111
4112
4113 /* Store a 16-bit Thumb insn into an output section not processed by
4114 elf32_arm_write_section. */
4115
4116 static void
4117 put_thumb_insn (struct elf32_arm_link_hash_table *htab,
4118 bfd * output_bfd, bfd_vma val, void * ptr)
4119 {
4120 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4121 bfd_putl16 (val, ptr);
4122 else
4123 bfd_putb16 (val, ptr);
4124 }
4125
4126
4127 /* Thumb code calling an ARM function. */
4128
4129 static int
4130 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
4131 const char * name,
4132 bfd * input_bfd,
4133 bfd * output_bfd,
4134 asection * input_section,
4135 bfd_byte * hit_data,
4136 asection * sym_sec,
4137 bfd_vma offset,
4138 bfd_signed_vma addend,
4139 bfd_vma val,
4140 char **error_message)
4141 {
4142 asection * s = 0;
4143 bfd_vma my_offset;
4144 long int ret_offset;
4145 struct elf_link_hash_entry * myh;
4146 struct elf32_arm_link_hash_table * globals;
4147
4148 myh = find_thumb_glue (info, name, error_message);
4149 if (myh == NULL)
4150 return FALSE;
4151
4152 globals = elf32_arm_hash_table (info);
4153
4154 BFD_ASSERT (globals != NULL);
4155 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4156
4157 my_offset = myh->root.u.def.value;
4158
4159 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4160 THUMB2ARM_GLUE_SECTION_NAME);
4161
4162 BFD_ASSERT (s != NULL);
4163 BFD_ASSERT (s->contents != NULL);
4164 BFD_ASSERT (s->output_section != NULL);
4165
4166 if ((my_offset & 0x01) == 0x01)
4167 {
4168 if (sym_sec != NULL
4169 && sym_sec->owner != NULL
4170 && !INTERWORK_FLAG (sym_sec->owner))
4171 {
4172 (*_bfd_error_handler)
4173 (_("%B(%s): warning: interworking not enabled.\n"
4174 " first occurrence: %B: thumb call to arm"),
4175 sym_sec->owner, input_bfd, name);
4176
4177 return FALSE;
4178 }
4179
4180 --my_offset;
4181 myh->root.u.def.value = my_offset;
4182
4183 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
4184 s->contents + my_offset);
4185
4186 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
4187 s->contents + my_offset + 2);
4188
4189 ret_offset =
4190 /* Address of destination of the stub. */
4191 ((bfd_signed_vma) val)
4192 - ((bfd_signed_vma)
4193 /* Offset from the start of the current section
4194 to the start of the stubs. */
4195 (s->output_offset
4196 /* Offset of the start of this stub from the start of the stubs. */
4197 + my_offset
4198 /* Address of the start of the current section. */
4199 + s->output_section->vma)
4200 /* The branch instruction is 4 bytes into the stub. */
4201 + 4
4202 /* ARM branches work from the pc of the instruction + 8. */
4203 + 8);
4204
4205 put_arm_insn (globals, output_bfd,
4206 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
4207 s->contents + my_offset + 4);
4208 }
4209
4210 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
4211
4212 /* Now go back and fix up the original BL insn to point to here. */
4213 ret_offset =
4214 /* Address of where the stub is located. */
4215 (s->output_section->vma + s->output_offset + my_offset)
4216 /* Address of where the BL is located. */
4217 - (input_section->output_section->vma + input_section->output_offset
4218 + offset)
4219 /* Addend in the relocation. */
4220 - addend
4221 /* Biassing for PC-relative addressing. */
4222 - 8;
4223
4224 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
4225
4226 return TRUE;
4227 }
4228
4229 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
4230
4231 static struct elf_link_hash_entry *
4232 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
4233 const char * name,
4234 bfd * input_bfd,
4235 bfd * output_bfd,
4236 asection * sym_sec,
4237 bfd_vma val,
4238 asection *s,
4239 char **error_message)
4240 {
4241 bfd_vma my_offset;
4242 long int ret_offset;
4243 struct elf_link_hash_entry * myh;
4244 struct elf32_arm_link_hash_table * globals;
4245
4246 myh = find_arm_glue (info, name, error_message);
4247 if (myh == NULL)
4248 return NULL;
4249
4250 globals = elf32_arm_hash_table (info);
4251
4252 BFD_ASSERT (globals != NULL);
4253 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4254
4255 my_offset = myh->root.u.def.value;
4256
4257 if ((my_offset & 0x01) == 0x01)
4258 {
4259 if (sym_sec != NULL
4260 && sym_sec->owner != NULL
4261 && !INTERWORK_FLAG (sym_sec->owner))
4262 {
4263 (*_bfd_error_handler)
4264 (_("%B(%s): warning: interworking not enabled.\n"
4265 " first occurrence: %B: arm call to thumb"),
4266 sym_sec->owner, input_bfd, name);
4267 }
4268
4269 --my_offset;
4270 myh->root.u.def.value = my_offset;
4271
4272 if (info->shared || globals->root.is_relocatable_executable
4273 || globals->pic_veneer)
4274 {
4275 /* For relocatable objects we can't use absolute addresses,
4276 so construct the address from a relative offset. */
4277 /* TODO: If the offset is small it's probably worth
4278 constructing the address with adds. */
4279 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
4280 s->contents + my_offset);
4281 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
4282 s->contents + my_offset + 4);
4283 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
4284 s->contents + my_offset + 8);
4285 /* Adjust the offset by 4 for the position of the add,
4286 and 8 for the pipeline offset. */
4287 ret_offset = (val - (s->output_offset
4288 + s->output_section->vma
4289 + my_offset + 12))
4290 | 1;
4291 bfd_put_32 (output_bfd, ret_offset,
4292 s->contents + my_offset + 12);
4293 }
4294 else if (globals->use_blx)
4295 {
4296 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
4297 s->contents + my_offset);
4298
4299 /* It's a thumb address. Add the low order bit. */
4300 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
4301 s->contents + my_offset + 4);
4302 }
4303 else
4304 {
4305 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
4306 s->contents + my_offset);
4307
4308 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
4309 s->contents + my_offset + 4);
4310
4311 /* It's a thumb address. Add the low order bit. */
4312 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
4313 s->contents + my_offset + 8);
4314 }
4315 }
4316
4317 BFD_ASSERT (my_offset <= globals->arm_glue_size);
4318
4319 return myh;
4320 }
4321
4322 /* Arm code calling a Thumb function. */
4323
4324 static int
4325 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
4326 const char * name,
4327 bfd * input_bfd,
4328 bfd * output_bfd,
4329 asection * input_section,
4330 bfd_byte * hit_data,
4331 asection * sym_sec,
4332 bfd_vma offset,
4333 bfd_signed_vma addend,
4334 bfd_vma val,
4335 char **error_message)
4336 {
4337 unsigned long int tmp;
4338 bfd_vma my_offset;
4339 asection * s;
4340 long int ret_offset;
4341 struct elf_link_hash_entry * myh;
4342 struct elf32_arm_link_hash_table * globals;
4343
4344 globals = elf32_arm_hash_table (info);
4345
4346 BFD_ASSERT (globals != NULL);
4347 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4348
4349 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4350 ARM2THUMB_GLUE_SECTION_NAME);
4351 BFD_ASSERT (s != NULL);
4352 BFD_ASSERT (s->contents != NULL);
4353 BFD_ASSERT (s->output_section != NULL);
4354
4355 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
4356 sym_sec, val, s, error_message);
4357 if (!myh)
4358 return FALSE;
4359
4360 my_offset = myh->root.u.def.value;
4361 tmp = bfd_get_32 (input_bfd, hit_data);
4362 tmp = tmp & 0xFF000000;
4363
4364 /* Somehow these are both 4 too far, so subtract 8. */
4365 ret_offset = (s->output_offset
4366 + my_offset
4367 + s->output_section->vma
4368 - (input_section->output_offset
4369 + input_section->output_section->vma
4370 + offset + addend)
4371 - 8);
4372
4373 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
4374
4375 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
4376
4377 return TRUE;
4378 }
4379
4380 /* Populate Arm stub for an exported Thumb function. */
4381
4382 static bfd_boolean
4383 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
4384 {
4385 struct bfd_link_info * info = (struct bfd_link_info *) inf;
4386 asection * s;
4387 struct elf_link_hash_entry * myh;
4388 struct elf32_arm_link_hash_entry *eh;
4389 struct elf32_arm_link_hash_table * globals;
4390 asection *sec;
4391 bfd_vma val;
4392 char *error_message;
4393
4394 eh = elf32_arm_hash_entry(h);
4395 /* Allocate stubs for exported Thumb functions on v4t. */
4396 if (eh->export_glue == NULL)
4397 return TRUE;
4398
4399 globals = elf32_arm_hash_table (info);
4400
4401 BFD_ASSERT (globals != NULL);
4402 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4403
4404 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4405 ARM2THUMB_GLUE_SECTION_NAME);
4406 BFD_ASSERT (s != NULL);
4407 BFD_ASSERT (s->contents != NULL);
4408 BFD_ASSERT (s->output_section != NULL);
4409
4410 sec = eh->export_glue->root.u.def.section;
4411
4412 BFD_ASSERT (sec->output_section != NULL);
4413
4414 val = eh->export_glue->root.u.def.value + sec->output_offset
4415 + sec->output_section->vma;
4416 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
4417 h->root.u.def.section->owner,
4418 globals->obfd, sec, val, s,
4419 &error_message);
4420 BFD_ASSERT (myh);
4421 return TRUE;
4422 }
4423
4424 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
4425
4426 static bfd_vma
4427 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
4428 {
4429 bfd_byte *p;
4430 bfd_vma glue_addr;
4431 asection *s;
4432 struct elf32_arm_link_hash_table *globals;
4433
4434 globals = elf32_arm_hash_table (info);
4435
4436 BFD_ASSERT (globals != NULL);
4437 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4438
4439 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4440 ARM_BX_GLUE_SECTION_NAME);
4441 BFD_ASSERT (s != NULL);
4442 BFD_ASSERT (s->contents != NULL);
4443 BFD_ASSERT (s->output_section != NULL);
4444
4445 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
4446
4447 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
4448
4449 if ((globals->bx_glue_offset[reg] & 1) == 0)
4450 {
4451 p = s->contents + glue_addr;
4452 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
4453 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
4454 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
4455 globals->bx_glue_offset[reg] |= 1;
4456 }
4457
4458 return glue_addr + s->output_section->vma + s->output_offset;
4459 }
4460
4461 /* Generate Arm stubs for exported Thumb symbols. */
4462 static void
4463 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
4464 struct bfd_link_info *link_info)
4465 {
4466 struct elf32_arm_link_hash_table * globals;
4467
4468 if (!link_info)
4469 return;
4470
4471 globals = elf32_arm_hash_table (link_info);
4472 /* If blx is available then exported Thumb symbols are OK and there is
4473 nothing to do. */
4474 if (globals->use_blx)
4475 return;
4476
4477 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
4478 link_info);
4479 }
4480
4481 /* Some relocations map to different relocations depending on the
4482 target. Return the real relocation. */
4483 static int
4484 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
4485 int r_type)
4486 {
4487 switch (r_type)
4488 {
4489 case R_ARM_TARGET1:
4490 if (globals->target1_is_rel)
4491 return R_ARM_REL32;
4492 else
4493 return R_ARM_ABS32;
4494
4495 case R_ARM_TARGET2:
4496 return globals->target2_reloc;
4497
4498 default:
4499 return r_type;
4500 }
4501 }
4502
4503 /* Return the base VMA address which should be subtracted from real addresses
4504 when resolving @dtpoff relocation.
4505 This is PT_TLS segment p_vaddr. */
4506
4507 static bfd_vma
4508 dtpoff_base (struct bfd_link_info *info)
4509 {
4510 /* If tls_sec is NULL, we should have signalled an error already. */
4511 if (elf_hash_table (info)->tls_sec == NULL)
4512 return 0;
4513 return elf_hash_table (info)->tls_sec->vma;
4514 }
4515
4516 /* Return the relocation value for @tpoff relocation
4517 if STT_TLS virtual address is ADDRESS. */
4518
4519 static bfd_vma
4520 tpoff (struct bfd_link_info *info, bfd_vma address)
4521 {
4522 struct elf_link_hash_table *htab = elf_hash_table (info);
4523 bfd_vma base;
4524
4525 /* If tls_sec is NULL, we should have signalled an error already. */
4526 if (htab->tls_sec == NULL)
4527 return 0;
4528 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
4529 return address - htab->tls_sec->vma + base;
4530 }
4531
4532 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
4533 VALUE is the relocation value. */
4534
4535 static bfd_reloc_status_type
4536 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
4537 {
4538 if (value > 0xfff)
4539 return bfd_reloc_overflow;
4540
4541 value |= bfd_get_32 (abfd, data) & 0xfffff000;
4542 bfd_put_32 (abfd, value, data);
4543 return bfd_reloc_ok;
4544 }
4545
4546 /* For a given value of n, calculate the value of G_n as required to
4547 deal with group relocations. We return it in the form of an
4548 encoded constant-and-rotation, together with the final residual. If n is
4549 specified as less than zero, then final_residual is filled with the
4550 input value and no further action is performed. */
4551
4552 static bfd_vma
4553 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
4554 {
4555 int current_n;
4556 bfd_vma g_n;
4557 bfd_vma encoded_g_n = 0;
4558 bfd_vma residual = value; /* Also known as Y_n. */
4559
4560 for (current_n = 0; current_n <= n; current_n++)
4561 {
4562 int shift;
4563
4564 /* Calculate which part of the value to mask. */
4565 if (residual == 0)
4566 shift = 0;
4567 else
4568 {
4569 int msb;
4570
4571 /* Determine the most significant bit in the residual and
4572 align the resulting value to a 2-bit boundary. */
4573 for (msb = 30; msb >= 0; msb -= 2)
4574 if (residual & (3 << msb))
4575 break;
4576
4577 /* The desired shift is now (msb - 6), or zero, whichever
4578 is the greater. */
4579 shift = msb - 6;
4580 if (shift < 0)
4581 shift = 0;
4582 }
4583
4584 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
4585 g_n = residual & (0xff << shift);
4586 encoded_g_n = (g_n >> shift)
4587 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
4588
4589 /* Calculate the residual for the next time around. */
4590 residual &= ~g_n;
4591 }
4592
4593 *final_residual = residual;
4594
4595 return encoded_g_n;
4596 }
4597
4598 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
4599 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
4600 static int
4601 identify_add_or_sub(bfd_vma insn)
4602 {
4603 int opcode = insn & 0x1e00000;
4604
4605 if (opcode == 1 << 23) /* ADD */
4606 return 1;
4607
4608 if (opcode == 1 << 22) /* SUB */
4609 return -1;
4610
4611 return 0;
4612 }
4613
4614 /* Determine if we're dealing with a Thumb-2 object. */
4615
4616 static int using_thumb2 (struct elf32_arm_link_hash_table *globals)
4617 {
4618 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4619 Tag_CPU_arch);
4620 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
4621 }
4622
4623 /* Perform a relocation as part of a final link. */
4624
4625 static bfd_reloc_status_type
4626 elf32_arm_final_link_relocate (reloc_howto_type * howto,
4627 bfd * input_bfd,
4628 bfd * output_bfd,
4629 asection * input_section,
4630 bfd_byte * contents,
4631 Elf_Internal_Rela * rel,
4632 bfd_vma value,
4633 struct bfd_link_info * info,
4634 asection * sym_sec,
4635 const char * sym_name,
4636 int sym_flags,
4637 struct elf_link_hash_entry * h,
4638 bfd_boolean * unresolved_reloc_p,
4639 char **error_message)
4640 {
4641 unsigned long r_type = howto->type;
4642 unsigned long r_symndx;
4643 bfd_byte * hit_data = contents + rel->r_offset;
4644 bfd * dynobj = NULL;
4645 Elf_Internal_Shdr * symtab_hdr;
4646 struct elf_link_hash_entry ** sym_hashes;
4647 bfd_vma * local_got_offsets;
4648 asection * sgot = NULL;
4649 asection * splt = NULL;
4650 asection * sreloc = NULL;
4651 bfd_vma addend;
4652 bfd_signed_vma signed_addend;
4653 struct elf32_arm_link_hash_table * globals;
4654
4655 globals = elf32_arm_hash_table (info);
4656
4657 BFD_ASSERT (is_arm_elf (input_bfd));
4658
4659 /* Some relocation types map to different relocations depending on the
4660 target. We pick the right one here. */
4661 r_type = arm_real_reloc_type (globals, r_type);
4662 if (r_type != howto->type)
4663 howto = elf32_arm_howto_from_type (r_type);
4664
4665 /* If the start address has been set, then set the EF_ARM_HASENTRY
4666 flag. Setting this more than once is redundant, but the cost is
4667 not too high, and it keeps the code simple.
4668
4669 The test is done here, rather than somewhere else, because the
4670 start address is only set just before the final link commences.
4671
4672 Note - if the user deliberately sets a start address of 0, the
4673 flag will not be set. */
4674 if (bfd_get_start_address (output_bfd) != 0)
4675 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
4676
4677 dynobj = elf_hash_table (info)->dynobj;
4678 if (dynobj)
4679 {
4680 sgot = bfd_get_section_by_name (dynobj, ".got");
4681 splt = bfd_get_section_by_name (dynobj, ".plt");
4682 }
4683 symtab_hdr = & elf_symtab_hdr (input_bfd);
4684 sym_hashes = elf_sym_hashes (input_bfd);
4685 local_got_offsets = elf_local_got_offsets (input_bfd);
4686 r_symndx = ELF32_R_SYM (rel->r_info);
4687
4688 if (globals->use_rel)
4689 {
4690 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
4691
4692 if (addend & ((howto->src_mask + 1) >> 1))
4693 {
4694 signed_addend = -1;
4695 signed_addend &= ~ howto->src_mask;
4696 signed_addend |= addend;
4697 }
4698 else
4699 signed_addend = addend;
4700 }
4701 else
4702 addend = signed_addend = rel->r_addend;
4703
4704 switch (r_type)
4705 {
4706 case R_ARM_NONE:
4707 /* We don't need to find a value for this symbol. It's just a
4708 marker. */
4709 *unresolved_reloc_p = FALSE;
4710 return bfd_reloc_ok;
4711
4712 case R_ARM_ABS12:
4713 if (!globals->vxworks_p)
4714 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4715
4716 case R_ARM_PC24:
4717 case R_ARM_ABS32:
4718 case R_ARM_ABS32_NOI:
4719 case R_ARM_REL32:
4720 case R_ARM_REL32_NOI:
4721 case R_ARM_CALL:
4722 case R_ARM_JUMP24:
4723 case R_ARM_XPC25:
4724 case R_ARM_PREL31:
4725 case R_ARM_PLT32:
4726 /* Handle relocations which should use the PLT entry. ABS32/REL32
4727 will use the symbol's value, which may point to a PLT entry, but we
4728 don't need to handle that here. If we created a PLT entry, all
4729 branches in this object should go to it. */
4730 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
4731 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
4732 && h != NULL
4733 && splt != NULL
4734 && h->plt.offset != (bfd_vma) -1)
4735 {
4736 /* If we've created a .plt section, and assigned a PLT entry to
4737 this function, it should not be known to bind locally. If
4738 it were, we would have cleared the PLT entry. */
4739 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
4740
4741 value = (splt->output_section->vma
4742 + splt->output_offset
4743 + h->plt.offset);
4744 *unresolved_reloc_p = FALSE;
4745 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4746 contents, rel->r_offset, value,
4747 rel->r_addend);
4748 }
4749
4750 /* When generating a shared object or relocatable executable, these
4751 relocations are copied into the output file to be resolved at
4752 run time. */
4753 if ((info->shared || globals->root.is_relocatable_executable)
4754 && (input_section->flags & SEC_ALLOC)
4755 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
4756 || !SYMBOL_CALLS_LOCAL (info, h))
4757 && (h == NULL
4758 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4759 || h->root.type != bfd_link_hash_undefweak)
4760 && r_type != R_ARM_PC24
4761 && r_type != R_ARM_CALL
4762 && r_type != R_ARM_JUMP24
4763 && r_type != R_ARM_PREL31
4764 && r_type != R_ARM_PLT32)
4765 {
4766 Elf_Internal_Rela outrel;
4767 bfd_byte *loc;
4768 bfd_boolean skip, relocate;
4769
4770 *unresolved_reloc_p = FALSE;
4771
4772 if (sreloc == NULL)
4773 {
4774 const char * name;
4775
4776 name = (bfd_elf_string_from_elf_section
4777 (input_bfd,
4778 elf_elfheader (input_bfd)->e_shstrndx,
4779 elf_section_data (input_section)->rel_hdr.sh_name));
4780 if (name == NULL)
4781 return bfd_reloc_notsupported;
4782
4783 BFD_ASSERT (reloc_section_p (globals, name, input_section));
4784
4785 sreloc = bfd_get_section_by_name (dynobj, name);
4786 BFD_ASSERT (sreloc != NULL);
4787 }
4788
4789 skip = FALSE;
4790 relocate = FALSE;
4791
4792 outrel.r_addend = addend;
4793 outrel.r_offset =
4794 _bfd_elf_section_offset (output_bfd, info, input_section,
4795 rel->r_offset);
4796 if (outrel.r_offset == (bfd_vma) -1)
4797 skip = TRUE;
4798 else if (outrel.r_offset == (bfd_vma) -2)
4799 skip = TRUE, relocate = TRUE;
4800 outrel.r_offset += (input_section->output_section->vma
4801 + input_section->output_offset);
4802
4803 if (skip)
4804 memset (&outrel, 0, sizeof outrel);
4805 else if (h != NULL
4806 && h->dynindx != -1
4807 && (!info->shared
4808 || !info->symbolic
4809 || !h->def_regular))
4810 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4811 else
4812 {
4813 int symbol;
4814
4815 /* This symbol is local, or marked to become local. */
4816 if (sym_flags == STT_ARM_TFUNC)
4817 value |= 1;
4818 if (globals->symbian_p)
4819 {
4820 asection *osec;
4821
4822 /* On Symbian OS, the data segment and text segement
4823 can be relocated independently. Therefore, we
4824 must indicate the segment to which this
4825 relocation is relative. The BPABI allows us to
4826 use any symbol in the right segment; we just use
4827 the section symbol as it is convenient. (We
4828 cannot use the symbol given by "h" directly as it
4829 will not appear in the dynamic symbol table.)
4830
4831 Note that the dynamic linker ignores the section
4832 symbol value, so we don't subtract osec->vma
4833 from the emitted reloc addend. */
4834 if (sym_sec)
4835 osec = sym_sec->output_section;
4836 else
4837 osec = input_section->output_section;
4838 symbol = elf_section_data (osec)->dynindx;
4839 if (symbol == 0)
4840 {
4841 struct elf_link_hash_table *htab = elf_hash_table (info);
4842
4843 if ((osec->flags & SEC_READONLY) == 0
4844 && htab->data_index_section != NULL)
4845 osec = htab->data_index_section;
4846 else
4847 osec = htab->text_index_section;
4848 symbol = elf_section_data (osec)->dynindx;
4849 }
4850 BFD_ASSERT (symbol != 0);
4851 }
4852 else
4853 /* On SVR4-ish systems, the dynamic loader cannot
4854 relocate the text and data segments independently,
4855 so the symbol does not matter. */
4856 symbol = 0;
4857 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
4858 if (globals->use_rel)
4859 relocate = TRUE;
4860 else
4861 outrel.r_addend += value;
4862 }
4863
4864 loc = sreloc->contents;
4865 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
4866 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4867
4868 /* If this reloc is against an external symbol, we do not want to
4869 fiddle with the addend. Otherwise, we need to include the symbol
4870 value so that it becomes an addend for the dynamic reloc. */
4871 if (! relocate)
4872 return bfd_reloc_ok;
4873
4874 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4875 contents, rel->r_offset, value,
4876 (bfd_vma) 0);
4877 }
4878 else switch (r_type)
4879 {
4880 case R_ARM_ABS12:
4881 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4882
4883 case R_ARM_XPC25: /* Arm BLX instruction. */
4884 case R_ARM_CALL:
4885 case R_ARM_JUMP24:
4886 case R_ARM_PC24: /* Arm B/BL instruction */
4887 case R_ARM_PLT32:
4888 if (r_type == R_ARM_XPC25)
4889 {
4890 /* Check for Arm calling Arm function. */
4891 /* FIXME: Should we translate the instruction into a BL
4892 instruction instead ? */
4893 if (sym_flags != STT_ARM_TFUNC)
4894 (*_bfd_error_handler)
4895 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
4896 input_bfd,
4897 h ? h->root.root.string : "(local)");
4898 }
4899 else if (r_type != R_ARM_CALL || !globals->use_blx)
4900 {
4901 /* Check for Arm calling Thumb function. */
4902 if (sym_flags == STT_ARM_TFUNC)
4903 {
4904 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
4905 output_bfd, input_section,
4906 hit_data, sym_sec, rel->r_offset,
4907 signed_addend, value,
4908 error_message))
4909 return bfd_reloc_ok;
4910 else
4911 return bfd_reloc_dangerous;
4912 }
4913 }
4914
4915 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
4916 where:
4917 S is the address of the symbol in the relocation.
4918 P is address of the instruction being relocated.
4919 A is the addend (extracted from the instruction) in bytes.
4920
4921 S is held in 'value'.
4922 P is the base address of the section containing the
4923 instruction plus the offset of the reloc into that
4924 section, ie:
4925 (input_section->output_section->vma +
4926 input_section->output_offset +
4927 rel->r_offset).
4928 A is the addend, converted into bytes, ie:
4929 (signed_addend * 4)
4930
4931 Note: None of these operations have knowledge of the pipeline
4932 size of the processor, thus it is up to the assembler to
4933 encode this information into the addend. */
4934 value -= (input_section->output_section->vma
4935 + input_section->output_offset);
4936 value -= rel->r_offset;
4937 if (globals->use_rel)
4938 value += (signed_addend << howto->size);
4939 else
4940 /* RELA addends do not have to be adjusted by howto->size. */
4941 value += signed_addend;
4942
4943 signed_addend = value;
4944 signed_addend >>= howto->rightshift;
4945
4946 /* A branch to an undefined weak symbol is turned into a jump to
4947 the next instruction. */
4948 if (h && h->root.type == bfd_link_hash_undefweak)
4949 {
4950 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000)
4951 | 0x0affffff;
4952 }
4953 else
4954 {
4955 /* Perform a signed range check. */
4956 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
4957 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
4958 return bfd_reloc_overflow;
4959
4960 addend = (value & 2);
4961
4962 value = (signed_addend & howto->dst_mask)
4963 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
4964
4965 /* Set the H bit in the BLX instruction. */
4966 if (sym_flags == STT_ARM_TFUNC)
4967 {
4968 if (addend)
4969 value |= (1 << 24);
4970 else
4971 value &= ~(bfd_vma)(1 << 24);
4972 }
4973 if (r_type == R_ARM_CALL)
4974 {
4975 /* Select the correct instruction (BL or BLX). */
4976 if (sym_flags == STT_ARM_TFUNC)
4977 value |= (1 << 28);
4978 else
4979 {
4980 value &= ~(bfd_vma)(1 << 28);
4981 value |= (1 << 24);
4982 }
4983 }
4984 }
4985 break;
4986
4987 case R_ARM_ABS32:
4988 value += addend;
4989 if (sym_flags == STT_ARM_TFUNC)
4990 value |= 1;
4991 break;
4992
4993 case R_ARM_ABS32_NOI:
4994 value += addend;
4995 break;
4996
4997 case R_ARM_REL32:
4998 value += addend;
4999 if (sym_flags == STT_ARM_TFUNC)
5000 value |= 1;
5001 value -= (input_section->output_section->vma
5002 + input_section->output_offset + rel->r_offset);
5003 break;
5004
5005 case R_ARM_REL32_NOI:
5006 value += addend;
5007 value -= (input_section->output_section->vma
5008 + input_section->output_offset + rel->r_offset);
5009 break;
5010
5011 case R_ARM_PREL31:
5012 value -= (input_section->output_section->vma
5013 + input_section->output_offset + rel->r_offset);
5014 value += signed_addend;
5015 if (! h || h->root.type != bfd_link_hash_undefweak)
5016 {
5017 /* Check for overflow */
5018 if ((value ^ (value >> 1)) & (1 << 30))
5019 return bfd_reloc_overflow;
5020 }
5021 value &= 0x7fffffff;
5022 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
5023 if (sym_flags == STT_ARM_TFUNC)
5024 value |= 1;
5025 break;
5026 }
5027
5028 bfd_put_32 (input_bfd, value, hit_data);
5029 return bfd_reloc_ok;
5030
5031 case R_ARM_ABS8:
5032 value += addend;
5033 if ((long) value > 0x7f || (long) value < -0x80)
5034 return bfd_reloc_overflow;
5035
5036 bfd_put_8 (input_bfd, value, hit_data);
5037 return bfd_reloc_ok;
5038
5039 case R_ARM_ABS16:
5040 value += addend;
5041
5042 if ((long) value > 0x7fff || (long) value < -0x8000)
5043 return bfd_reloc_overflow;
5044
5045 bfd_put_16 (input_bfd, value, hit_data);
5046 return bfd_reloc_ok;
5047
5048 case R_ARM_THM_ABS5:
5049 /* Support ldr and str instructions for the thumb. */
5050 if (globals->use_rel)
5051 {
5052 /* Need to refetch addend. */
5053 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
5054 /* ??? Need to determine shift amount from operand size. */
5055 addend >>= howto->rightshift;
5056 }
5057 value += addend;
5058
5059 /* ??? Isn't value unsigned? */
5060 if ((long) value > 0x1f || (long) value < -0x10)
5061 return bfd_reloc_overflow;
5062
5063 /* ??? Value needs to be properly shifted into place first. */
5064 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
5065 bfd_put_16 (input_bfd, value, hit_data);
5066 return bfd_reloc_ok;
5067
5068 case R_ARM_THM_ALU_PREL_11_0:
5069 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
5070 {
5071 bfd_vma insn;
5072 bfd_signed_vma relocation;
5073
5074 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
5075 | bfd_get_16 (input_bfd, hit_data + 2);
5076
5077 if (globals->use_rel)
5078 {
5079 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
5080 | ((insn & (1 << 26)) >> 15);
5081 if (insn & 0xf00000)
5082 signed_addend = -signed_addend;
5083 }
5084
5085 relocation = value + signed_addend;
5086 relocation -= (input_section->output_section->vma
5087 + input_section->output_offset
5088 + rel->r_offset);
5089
5090 value = abs (relocation);
5091
5092 if (value >= 0x1000)
5093 return bfd_reloc_overflow;
5094
5095 insn = (insn & 0xfb0f8f00) | (value & 0xff)
5096 | ((value & 0x700) << 4)
5097 | ((value & 0x800) << 15);
5098 if (relocation < 0)
5099 insn |= 0xa00000;
5100
5101 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5102 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5103
5104 return bfd_reloc_ok;
5105 }
5106
5107 case R_ARM_THM_PC12:
5108 /* Corresponds to: ldr.w reg, [pc, #offset]. */
5109 {
5110 bfd_vma insn;
5111 bfd_signed_vma relocation;
5112
5113 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
5114 | bfd_get_16 (input_bfd, hit_data + 2);
5115
5116 if (globals->use_rel)
5117 {
5118 signed_addend = insn & 0xfff;
5119 if (!(insn & (1 << 23)))
5120 signed_addend = -signed_addend;
5121 }
5122
5123 relocation = value + signed_addend;
5124 relocation -= (input_section->output_section->vma
5125 + input_section->output_offset
5126 + rel->r_offset);
5127
5128 value = abs (relocation);
5129
5130 if (value >= 0x1000)
5131 return bfd_reloc_overflow;
5132
5133 insn = (insn & 0xff7ff000) | value;
5134 if (relocation >= 0)
5135 insn |= (1 << 23);
5136
5137 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5138 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5139
5140 return bfd_reloc_ok;
5141 }
5142
5143 case R_ARM_THM_XPC22:
5144 case R_ARM_THM_CALL:
5145 case R_ARM_THM_JUMP24:
5146 /* Thumb BL (branch long instruction). */
5147 {
5148 bfd_vma relocation;
5149 bfd_vma reloc_sign;
5150 bfd_boolean overflow = FALSE;
5151 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5152 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5153 bfd_signed_vma reloc_signed_max;
5154 bfd_signed_vma reloc_signed_min;
5155 bfd_vma check;
5156 bfd_signed_vma signed_check;
5157 int bitsize;
5158 int thumb2 = using_thumb2 (globals);
5159
5160 /* A branch to an undefined weak symbol is turned into a jump to
5161 the next instruction. */
5162 if (h && h->root.type == bfd_link_hash_undefweak)
5163 {
5164 bfd_put_16 (input_bfd, 0xe000, hit_data);
5165 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
5166 return bfd_reloc_ok;
5167 }
5168
5169 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
5170 with Thumb-1) involving the J1 and J2 bits. */
5171 if (globals->use_rel)
5172 {
5173 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
5174 bfd_vma upper = upper_insn & 0x3ff;
5175 bfd_vma lower = lower_insn & 0x7ff;
5176 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
5177 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
5178 bfd_vma i1 = j1 ^ s ? 0 : 1;
5179 bfd_vma i2 = j2 ^ s ? 0 : 1;
5180
5181 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
5182 /* Sign extend. */
5183 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
5184
5185 signed_addend = addend;
5186 }
5187
5188 if (r_type == R_ARM_THM_XPC22)
5189 {
5190 /* Check for Thumb to Thumb call. */
5191 /* FIXME: Should we translate the instruction into a BL
5192 instruction instead ? */
5193 if (sym_flags == STT_ARM_TFUNC)
5194 (*_bfd_error_handler)
5195 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
5196 input_bfd,
5197 h ? h->root.root.string : "(local)");
5198 }
5199 else
5200 {
5201 /* If it is not a call to Thumb, assume call to Arm.
5202 If it is a call relative to a section name, then it is not a
5203 function call at all, but rather a long jump. Calls through
5204 the PLT do not require stubs. */
5205 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
5206 && (h == NULL || splt == NULL
5207 || h->plt.offset == (bfd_vma) -1))
5208 {
5209 if (globals->use_blx && r_type == R_ARM_THM_CALL)
5210 {
5211 /* Convert BL to BLX. */
5212 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5213 }
5214 else if (elf32_thumb_to_arm_stub
5215 (info, sym_name, input_bfd, output_bfd, input_section,
5216 hit_data, sym_sec, rel->r_offset, signed_addend, value,
5217 error_message))
5218 return bfd_reloc_ok;
5219 else
5220 return bfd_reloc_dangerous;
5221 }
5222 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
5223 && r_type == R_ARM_THM_CALL)
5224 {
5225 /* Make sure this is a BL. */
5226 lower_insn |= 0x1800;
5227 }
5228 }
5229
5230 /* Handle calls via the PLT. */
5231 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
5232 {
5233 value = (splt->output_section->vma
5234 + splt->output_offset
5235 + h->plt.offset);
5236 if (globals->use_blx && r_type == R_ARM_THM_CALL)
5237 {
5238 /* If the Thumb BLX instruction is available, convert the
5239 BL to a BLX instruction to call the ARM-mode PLT entry. */
5240 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5241 }
5242 else
5243 /* Target the Thumb stub before the ARM PLT entry. */
5244 value -= PLT_THUMB_STUB_SIZE;
5245 *unresolved_reloc_p = FALSE;
5246 }
5247
5248 relocation = value + signed_addend;
5249
5250 relocation -= (input_section->output_section->vma
5251 + input_section->output_offset
5252 + rel->r_offset);
5253
5254 check = relocation >> howto->rightshift;
5255
5256 /* If this is a signed value, the rightshift just dropped
5257 leading 1 bits (assuming twos complement). */
5258 if ((bfd_signed_vma) relocation >= 0)
5259 signed_check = check;
5260 else
5261 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
5262
5263 /* Calculate the permissable maximum and minimum values for
5264 this relocation according to whether we're relocating for
5265 Thumb-2 or not. */
5266 bitsize = howto->bitsize;
5267 if (!thumb2)
5268 bitsize -= 2;
5269 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
5270 reloc_signed_min = ~reloc_signed_max;
5271
5272 /* Assumes two's complement. */
5273 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5274 overflow = TRUE;
5275
5276 if ((lower_insn & 0x5000) == 0x4000)
5277 /* For a BLX instruction, make sure that the relocation is rounded up
5278 to a word boundary. This follows the semantics of the instruction
5279 which specifies that bit 1 of the target address will come from bit
5280 1 of the base address. */
5281 relocation = (relocation + 2) & ~ 3;
5282
5283 /* Put RELOCATION back into the insn. Assumes two's complement.
5284 We use the Thumb-2 encoding, which is safe even if dealing with
5285 a Thumb-1 instruction by virtue of our overflow check above. */
5286 reloc_sign = (signed_check < 0) ? 1 : 0;
5287 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
5288 | ((relocation >> 12) & 0x3ff)
5289 | (reloc_sign << 10);
5290 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
5291 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
5292 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
5293 | ((relocation >> 1) & 0x7ff);
5294
5295 /* Put the relocated value back in the object file: */
5296 bfd_put_16 (input_bfd, upper_insn, hit_data);
5297 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5298
5299 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5300 }
5301 break;
5302
5303 case R_ARM_THM_JUMP19:
5304 /* Thumb32 conditional branch instruction. */
5305 {
5306 bfd_vma relocation;
5307 bfd_boolean overflow = FALSE;
5308 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5309 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5310 bfd_signed_vma reloc_signed_max = 0xffffe;
5311 bfd_signed_vma reloc_signed_min = -0x100000;
5312 bfd_signed_vma signed_check;
5313
5314 /* Need to refetch the addend, reconstruct the top three bits,
5315 and squish the two 11 bit pieces together. */
5316 if (globals->use_rel)
5317 {
5318 bfd_vma S = (upper_insn & 0x0400) >> 10;
5319 bfd_vma upper = (upper_insn & 0x003f);
5320 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
5321 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
5322 bfd_vma lower = (lower_insn & 0x07ff);
5323
5324 upper |= J1 << 6;
5325 upper |= J2 << 7;
5326 upper |= (!S) << 8;
5327 upper -= 0x0100; /* Sign extend. */
5328
5329 addend = (upper << 12) | (lower << 1);
5330 signed_addend = addend;
5331 }
5332
5333 /* Handle calls via the PLT. */
5334 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
5335 {
5336 value = (splt->output_section->vma
5337 + splt->output_offset
5338 + h->plt.offset);
5339 /* Target the Thumb stub before the ARM PLT entry. */
5340 value -= PLT_THUMB_STUB_SIZE;
5341 *unresolved_reloc_p = FALSE;
5342 }
5343
5344 /* ??? Should handle interworking? GCC might someday try to
5345 use this for tail calls. */
5346
5347 relocation = value + signed_addend;
5348 relocation -= (input_section->output_section->vma
5349 + input_section->output_offset
5350 + rel->r_offset);
5351 signed_check = (bfd_signed_vma) relocation;
5352
5353 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5354 overflow = TRUE;
5355
5356 /* Put RELOCATION back into the insn. */
5357 {
5358 bfd_vma S = (relocation & 0x00100000) >> 20;
5359 bfd_vma J2 = (relocation & 0x00080000) >> 19;
5360 bfd_vma J1 = (relocation & 0x00040000) >> 18;
5361 bfd_vma hi = (relocation & 0x0003f000) >> 12;
5362 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
5363
5364 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
5365 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
5366 }
5367
5368 /* Put the relocated value back in the object file: */
5369 bfd_put_16 (input_bfd, upper_insn, hit_data);
5370 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5371
5372 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5373 }
5374
5375 case R_ARM_THM_JUMP11:
5376 case R_ARM_THM_JUMP8:
5377 case R_ARM_THM_JUMP6:
5378 /* Thumb B (branch) instruction). */
5379 {
5380 bfd_signed_vma relocation;
5381 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
5382 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
5383 bfd_signed_vma signed_check;
5384
5385 /* CZB cannot jump backward. */
5386 if (r_type == R_ARM_THM_JUMP6)
5387 reloc_signed_min = 0;
5388
5389 if (globals->use_rel)
5390 {
5391 /* Need to refetch addend. */
5392 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
5393 if (addend & ((howto->src_mask + 1) >> 1))
5394 {
5395 signed_addend = -1;
5396 signed_addend &= ~ howto->src_mask;
5397 signed_addend |= addend;
5398 }
5399 else
5400 signed_addend = addend;
5401 /* The value in the insn has been right shifted. We need to
5402 undo this, so that we can perform the address calculation
5403 in terms of bytes. */
5404 signed_addend <<= howto->rightshift;
5405 }
5406 relocation = value + signed_addend;
5407
5408 relocation -= (input_section->output_section->vma
5409 + input_section->output_offset
5410 + rel->r_offset);
5411
5412 relocation >>= howto->rightshift;
5413 signed_check = relocation;
5414
5415 if (r_type == R_ARM_THM_JUMP6)
5416 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
5417 else
5418 relocation &= howto->dst_mask;
5419 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
5420
5421 bfd_put_16 (input_bfd, relocation, hit_data);
5422
5423 /* Assumes two's complement. */
5424 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5425 return bfd_reloc_overflow;
5426
5427 return bfd_reloc_ok;
5428 }
5429
5430 case R_ARM_ALU_PCREL7_0:
5431 case R_ARM_ALU_PCREL15_8:
5432 case R_ARM_ALU_PCREL23_15:
5433 {
5434 bfd_vma insn;
5435 bfd_vma relocation;
5436
5437 insn = bfd_get_32 (input_bfd, hit_data);
5438 if (globals->use_rel)
5439 {
5440 /* Extract the addend. */
5441 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
5442 signed_addend = addend;
5443 }
5444 relocation = value + signed_addend;
5445
5446 relocation -= (input_section->output_section->vma
5447 + input_section->output_offset
5448 + rel->r_offset);
5449 insn = (insn & ~0xfff)
5450 | ((howto->bitpos << 7) & 0xf00)
5451 | ((relocation >> howto->bitpos) & 0xff);
5452 bfd_put_32 (input_bfd, value, hit_data);
5453 }
5454 return bfd_reloc_ok;
5455
5456 case R_ARM_GNU_VTINHERIT:
5457 case R_ARM_GNU_VTENTRY:
5458 return bfd_reloc_ok;
5459
5460 case R_ARM_GOTOFF32:
5461 /* Relocation is relative to the start of the
5462 global offset table. */
5463
5464 BFD_ASSERT (sgot != NULL);
5465 if (sgot == NULL)
5466 return bfd_reloc_notsupported;
5467
5468 /* If we are addressing a Thumb function, we need to adjust the
5469 address by one, so that attempts to call the function pointer will
5470 correctly interpret it as Thumb code. */
5471 if (sym_flags == STT_ARM_TFUNC)
5472 value += 1;
5473
5474 /* Note that sgot->output_offset is not involved in this
5475 calculation. We always want the start of .got. If we
5476 define _GLOBAL_OFFSET_TABLE in a different way, as is
5477 permitted by the ABI, we might have to change this
5478 calculation. */
5479 value -= sgot->output_section->vma;
5480 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5481 contents, rel->r_offset, value,
5482 rel->r_addend);
5483
5484 case R_ARM_GOTPC:
5485 /* Use global offset table as symbol value. */
5486 BFD_ASSERT (sgot != NULL);
5487
5488 if (sgot == NULL)
5489 return bfd_reloc_notsupported;
5490
5491 *unresolved_reloc_p = FALSE;
5492 value = sgot->output_section->vma;
5493 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5494 contents, rel->r_offset, value,
5495 rel->r_addend);
5496
5497 case R_ARM_GOT32:
5498 case R_ARM_GOT_PREL:
5499 /* Relocation is to the entry for this symbol in the
5500 global offset table. */
5501 if (sgot == NULL)
5502 return bfd_reloc_notsupported;
5503
5504 if (h != NULL)
5505 {
5506 bfd_vma off;
5507 bfd_boolean dyn;
5508
5509 off = h->got.offset;
5510 BFD_ASSERT (off != (bfd_vma) -1);
5511 dyn = globals->root.dynamic_sections_created;
5512
5513 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5514 || (info->shared
5515 && SYMBOL_REFERENCES_LOCAL (info, h))
5516 || (ELF_ST_VISIBILITY (h->other)
5517 && h->root.type == bfd_link_hash_undefweak))
5518 {
5519 /* This is actually a static link, or it is a -Bsymbolic link
5520 and the symbol is defined locally. We must initialize this
5521 entry in the global offset table. Since the offset must
5522 always be a multiple of 4, we use the least significant bit
5523 to record whether we have initialized it already.
5524
5525 When doing a dynamic link, we create a .rel(a).got relocation
5526 entry to initialize the value. This is done in the
5527 finish_dynamic_symbol routine. */
5528 if ((off & 1) != 0)
5529 off &= ~1;
5530 else
5531 {
5532 /* If we are addressing a Thumb function, we need to
5533 adjust the address by one, so that attempts to
5534 call the function pointer will correctly
5535 interpret it as Thumb code. */
5536 if (sym_flags == STT_ARM_TFUNC)
5537 value |= 1;
5538
5539 bfd_put_32 (output_bfd, value, sgot->contents + off);
5540 h->got.offset |= 1;
5541 }
5542 }
5543 else
5544 *unresolved_reloc_p = FALSE;
5545
5546 value = sgot->output_offset + off;
5547 }
5548 else
5549 {
5550 bfd_vma off;
5551
5552 BFD_ASSERT (local_got_offsets != NULL &&
5553 local_got_offsets[r_symndx] != (bfd_vma) -1);
5554
5555 off = local_got_offsets[r_symndx];
5556
5557 /* The offset must always be a multiple of 4. We use the
5558 least significant bit to record whether we have already
5559 generated the necessary reloc. */
5560 if ((off & 1) != 0)
5561 off &= ~1;
5562 else
5563 {
5564 /* If we are addressing a Thumb function, we need to
5565 adjust the address by one, so that attempts to
5566 call the function pointer will correctly
5567 interpret it as Thumb code. */
5568 if (sym_flags == STT_ARM_TFUNC)
5569 value |= 1;
5570
5571 if (globals->use_rel)
5572 bfd_put_32 (output_bfd, value, sgot->contents + off);
5573
5574 if (info->shared)
5575 {
5576 asection * srelgot;
5577 Elf_Internal_Rela outrel;
5578 bfd_byte *loc;
5579
5580 srelgot = (bfd_get_section_by_name
5581 (dynobj, RELOC_SECTION (globals, ".got")));
5582 BFD_ASSERT (srelgot != NULL);
5583
5584 outrel.r_addend = addend + value;
5585 outrel.r_offset = (sgot->output_section->vma
5586 + sgot->output_offset
5587 + off);
5588 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5589 loc = srelgot->contents;
5590 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
5591 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5592 }
5593
5594 local_got_offsets[r_symndx] |= 1;
5595 }
5596
5597 value = sgot->output_offset + off;
5598 }
5599 if (r_type != R_ARM_GOT32)
5600 value += sgot->output_section->vma;
5601
5602 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5603 contents, rel->r_offset, value,
5604 rel->r_addend);
5605
5606 case R_ARM_TLS_LDO32:
5607 value = value - dtpoff_base (info);
5608
5609 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5610 contents, rel->r_offset, value,
5611 rel->r_addend);
5612
5613 case R_ARM_TLS_LDM32:
5614 {
5615 bfd_vma off;
5616
5617 if (globals->sgot == NULL)
5618 abort ();
5619
5620 off = globals->tls_ldm_got.offset;
5621
5622 if ((off & 1) != 0)
5623 off &= ~1;
5624 else
5625 {
5626 /* If we don't know the module number, create a relocation
5627 for it. */
5628 if (info->shared)
5629 {
5630 Elf_Internal_Rela outrel;
5631 bfd_byte *loc;
5632
5633 if (globals->srelgot == NULL)
5634 abort ();
5635
5636 outrel.r_addend = 0;
5637 outrel.r_offset = (globals->sgot->output_section->vma
5638 + globals->sgot->output_offset + off);
5639 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
5640
5641 if (globals->use_rel)
5642 bfd_put_32 (output_bfd, outrel.r_addend,
5643 globals->sgot->contents + off);
5644
5645 loc = globals->srelgot->contents;
5646 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
5647 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5648 }
5649 else
5650 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
5651
5652 globals->tls_ldm_got.offset |= 1;
5653 }
5654
5655 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5656 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5657
5658 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5659 contents, rel->r_offset, value,
5660 rel->r_addend);
5661 }
5662
5663 case R_ARM_TLS_GD32:
5664 case R_ARM_TLS_IE32:
5665 {
5666 bfd_vma off;
5667 int indx;
5668 char tls_type;
5669
5670 if (globals->sgot == NULL)
5671 abort ();
5672
5673 indx = 0;
5674 if (h != NULL)
5675 {
5676 bfd_boolean dyn;
5677 dyn = globals->root.dynamic_sections_created;
5678 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5679 && (!info->shared
5680 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5681 {
5682 *unresolved_reloc_p = FALSE;
5683 indx = h->dynindx;
5684 }
5685 off = h->got.offset;
5686 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
5687 }
5688 else
5689 {
5690 if (local_got_offsets == NULL)
5691 abort ();
5692 off = local_got_offsets[r_symndx];
5693 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
5694 }
5695
5696 if (tls_type == GOT_UNKNOWN)
5697 abort ();
5698
5699 if ((off & 1) != 0)
5700 off &= ~1;
5701 else
5702 {
5703 bfd_boolean need_relocs = FALSE;
5704 Elf_Internal_Rela outrel;
5705 bfd_byte *loc = NULL;
5706 int cur_off = off;
5707
5708 /* The GOT entries have not been initialized yet. Do it
5709 now, and emit any relocations. If both an IE GOT and a
5710 GD GOT are necessary, we emit the GD first. */
5711
5712 if ((info->shared || indx != 0)
5713 && (h == NULL
5714 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5715 || h->root.type != bfd_link_hash_undefweak))
5716 {
5717 need_relocs = TRUE;
5718 if (globals->srelgot == NULL)
5719 abort ();
5720 loc = globals->srelgot->contents;
5721 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
5722 }
5723
5724 if (tls_type & GOT_TLS_GD)
5725 {
5726 if (need_relocs)
5727 {
5728 outrel.r_addend = 0;
5729 outrel.r_offset = (globals->sgot->output_section->vma
5730 + globals->sgot->output_offset
5731 + cur_off);
5732 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
5733
5734 if (globals->use_rel)
5735 bfd_put_32 (output_bfd, outrel.r_addend,
5736 globals->sgot->contents + cur_off);
5737
5738 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5739 globals->srelgot->reloc_count++;
5740 loc += RELOC_SIZE (globals);
5741
5742 if (indx == 0)
5743 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5744 globals->sgot->contents + cur_off + 4);
5745 else
5746 {
5747 outrel.r_addend = 0;
5748 outrel.r_info = ELF32_R_INFO (indx,
5749 R_ARM_TLS_DTPOFF32);
5750 outrel.r_offset += 4;
5751
5752 if (globals->use_rel)
5753 bfd_put_32 (output_bfd, outrel.r_addend,
5754 globals->sgot->contents + cur_off + 4);
5755
5756
5757 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5758 globals->srelgot->reloc_count++;
5759 loc += RELOC_SIZE (globals);
5760 }
5761 }
5762 else
5763 {
5764 /* If we are not emitting relocations for a
5765 general dynamic reference, then we must be in a
5766 static link or an executable link with the
5767 symbol binding locally. Mark it as belonging
5768 to module 1, the executable. */
5769 bfd_put_32 (output_bfd, 1,
5770 globals->sgot->contents + cur_off);
5771 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5772 globals->sgot->contents + cur_off + 4);
5773 }
5774
5775 cur_off += 8;
5776 }
5777
5778 if (tls_type & GOT_TLS_IE)
5779 {
5780 if (need_relocs)
5781 {
5782 if (indx == 0)
5783 outrel.r_addend = value - dtpoff_base (info);
5784 else
5785 outrel.r_addend = 0;
5786 outrel.r_offset = (globals->sgot->output_section->vma
5787 + globals->sgot->output_offset
5788 + cur_off);
5789 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
5790
5791 if (globals->use_rel)
5792 bfd_put_32 (output_bfd, outrel.r_addend,
5793 globals->sgot->contents + cur_off);
5794
5795 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5796 globals->srelgot->reloc_count++;
5797 loc += RELOC_SIZE (globals);
5798 }
5799 else
5800 bfd_put_32 (output_bfd, tpoff (info, value),
5801 globals->sgot->contents + cur_off);
5802 cur_off += 4;
5803 }
5804
5805 if (h != NULL)
5806 h->got.offset |= 1;
5807 else
5808 local_got_offsets[r_symndx] |= 1;
5809 }
5810
5811 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
5812 off += 8;
5813 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5814 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5815
5816 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5817 contents, rel->r_offset, value,
5818 rel->r_addend);
5819 }
5820
5821 case R_ARM_TLS_LE32:
5822 if (info->shared)
5823 {
5824 (*_bfd_error_handler)
5825 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
5826 input_bfd, input_section,
5827 (long) rel->r_offset, howto->name);
5828 return FALSE;
5829 }
5830 else
5831 value = tpoff (info, value);
5832
5833 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5834 contents, rel->r_offset, value,
5835 rel->r_addend);
5836
5837 case R_ARM_V4BX:
5838 if (globals->fix_v4bx)
5839 {
5840 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5841
5842 /* Ensure that we have a BX instruction. */
5843 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
5844
5845 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
5846 {
5847 /* Branch to veneer. */
5848 bfd_vma glue_addr;
5849 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
5850 glue_addr -= input_section->output_section->vma
5851 + input_section->output_offset
5852 + rel->r_offset + 8;
5853 insn = (insn & 0xf0000000) | 0x0a000000
5854 | ((glue_addr >> 2) & 0x00ffffff);
5855 }
5856 else
5857 {
5858 /* Preserve Rm (lowest four bits) and the condition code
5859 (highest four bits). Other bits encode MOV PC,Rm. */
5860 insn = (insn & 0xf000000f) | 0x01a0f000;
5861 }
5862
5863 bfd_put_32 (input_bfd, insn, hit_data);
5864 }
5865 return bfd_reloc_ok;
5866
5867 case R_ARM_MOVW_ABS_NC:
5868 case R_ARM_MOVT_ABS:
5869 case R_ARM_MOVW_PREL_NC:
5870 case R_ARM_MOVT_PREL:
5871 /* Until we properly support segment-base-relative addressing then
5872 we assume the segment base to be zero, as for the group relocations.
5873 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
5874 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
5875 case R_ARM_MOVW_BREL_NC:
5876 case R_ARM_MOVW_BREL:
5877 case R_ARM_MOVT_BREL:
5878 {
5879 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5880
5881 if (globals->use_rel)
5882 {
5883 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
5884 signed_addend = (addend ^ 0x8000) - 0x8000;
5885 }
5886
5887 value += signed_addend;
5888
5889 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
5890 value -= (input_section->output_section->vma
5891 + input_section->output_offset + rel->r_offset);
5892
5893 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
5894 return bfd_reloc_overflow;
5895
5896 if (sym_flags == STT_ARM_TFUNC)
5897 value |= 1;
5898
5899 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
5900 || r_type == R_ARM_MOVT_BREL)
5901 value >>= 16;
5902
5903 insn &= 0xfff0f000;
5904 insn |= value & 0xfff;
5905 insn |= (value & 0xf000) << 4;
5906 bfd_put_32 (input_bfd, insn, hit_data);
5907 }
5908 return bfd_reloc_ok;
5909
5910 case R_ARM_THM_MOVW_ABS_NC:
5911 case R_ARM_THM_MOVT_ABS:
5912 case R_ARM_THM_MOVW_PREL_NC:
5913 case R_ARM_THM_MOVT_PREL:
5914 /* Until we properly support segment-base-relative addressing then
5915 we assume the segment base to be zero, as for the above relocations.
5916 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
5917 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
5918 as R_ARM_THM_MOVT_ABS. */
5919 case R_ARM_THM_MOVW_BREL_NC:
5920 case R_ARM_THM_MOVW_BREL:
5921 case R_ARM_THM_MOVT_BREL:
5922 {
5923 bfd_vma insn;
5924
5925 insn = bfd_get_16 (input_bfd, hit_data) << 16;
5926 insn |= bfd_get_16 (input_bfd, hit_data + 2);
5927
5928 if (globals->use_rel)
5929 {
5930 addend = ((insn >> 4) & 0xf000)
5931 | ((insn >> 15) & 0x0800)
5932 | ((insn >> 4) & 0x0700)
5933 | (insn & 0x00ff);
5934 signed_addend = (addend ^ 0x8000) - 0x8000;
5935 }
5936
5937 value += signed_addend;
5938
5939 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
5940 value -= (input_section->output_section->vma
5941 + input_section->output_offset + rel->r_offset);
5942
5943 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
5944 return bfd_reloc_overflow;
5945
5946 if (sym_flags == STT_ARM_TFUNC)
5947 value |= 1;
5948
5949 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
5950 || r_type == R_ARM_THM_MOVT_BREL)
5951 value >>= 16;
5952
5953 insn &= 0xfbf08f00;
5954 insn |= (value & 0xf000) << 4;
5955 insn |= (value & 0x0800) << 15;
5956 insn |= (value & 0x0700) << 4;
5957 insn |= (value & 0x00ff);
5958
5959 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5960 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5961 }
5962 return bfd_reloc_ok;
5963
5964 case R_ARM_ALU_PC_G0_NC:
5965 case R_ARM_ALU_PC_G1_NC:
5966 case R_ARM_ALU_PC_G0:
5967 case R_ARM_ALU_PC_G1:
5968 case R_ARM_ALU_PC_G2:
5969 case R_ARM_ALU_SB_G0_NC:
5970 case R_ARM_ALU_SB_G1_NC:
5971 case R_ARM_ALU_SB_G0:
5972 case R_ARM_ALU_SB_G1:
5973 case R_ARM_ALU_SB_G2:
5974 {
5975 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5976 bfd_vma pc = input_section->output_section->vma
5977 + input_section->output_offset + rel->r_offset;
5978 /* sb should be the origin of the *segment* containing the symbol.
5979 It is not clear how to obtain this OS-dependent value, so we
5980 make an arbitrary choice of zero. */
5981 bfd_vma sb = 0;
5982 bfd_vma residual;
5983 bfd_vma g_n;
5984 bfd_signed_vma signed_value;
5985 int group = 0;
5986
5987 /* Determine which group of bits to select. */
5988 switch (r_type)
5989 {
5990 case R_ARM_ALU_PC_G0_NC:
5991 case R_ARM_ALU_PC_G0:
5992 case R_ARM_ALU_SB_G0_NC:
5993 case R_ARM_ALU_SB_G0:
5994 group = 0;
5995 break;
5996
5997 case R_ARM_ALU_PC_G1_NC:
5998 case R_ARM_ALU_PC_G1:
5999 case R_ARM_ALU_SB_G1_NC:
6000 case R_ARM_ALU_SB_G1:
6001 group = 1;
6002 break;
6003
6004 case R_ARM_ALU_PC_G2:
6005 case R_ARM_ALU_SB_G2:
6006 group = 2;
6007 break;
6008
6009 default:
6010 abort();
6011 }
6012
6013 /* If REL, extract the addend from the insn. If RELA, it will
6014 have already been fetched for us. */
6015 if (globals->use_rel)
6016 {
6017 int negative;
6018 bfd_vma constant = insn & 0xff;
6019 bfd_vma rotation = (insn & 0xf00) >> 8;
6020
6021 if (rotation == 0)
6022 signed_addend = constant;
6023 else
6024 {
6025 /* Compensate for the fact that in the instruction, the
6026 rotation is stored in multiples of 2 bits. */
6027 rotation *= 2;
6028
6029 /* Rotate "constant" right by "rotation" bits. */
6030 signed_addend = (constant >> rotation) |
6031 (constant << (8 * sizeof (bfd_vma) - rotation));
6032 }
6033
6034 /* Determine if the instruction is an ADD or a SUB.
6035 (For REL, this determines the sign of the addend.) */
6036 negative = identify_add_or_sub (insn);
6037 if (negative == 0)
6038 {
6039 (*_bfd_error_handler)
6040 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
6041 input_bfd, input_section,
6042 (long) rel->r_offset, howto->name);
6043 return bfd_reloc_overflow;
6044 }
6045
6046 signed_addend *= negative;
6047 }
6048
6049 /* Compute the value (X) to go in the place. */
6050 if (r_type == R_ARM_ALU_PC_G0_NC
6051 || r_type == R_ARM_ALU_PC_G1_NC
6052 || r_type == R_ARM_ALU_PC_G0
6053 || r_type == R_ARM_ALU_PC_G1
6054 || r_type == R_ARM_ALU_PC_G2)
6055 /* PC relative. */
6056 signed_value = value - pc + signed_addend;
6057 else
6058 /* Section base relative. */
6059 signed_value = value - sb + signed_addend;
6060
6061 /* If the target symbol is a Thumb function, then set the
6062 Thumb bit in the address. */
6063 if (sym_flags == STT_ARM_TFUNC)
6064 signed_value |= 1;
6065
6066 /* Calculate the value of the relevant G_n, in encoded
6067 constant-with-rotation format. */
6068 g_n = calculate_group_reloc_mask (abs (signed_value), group,
6069 &residual);
6070
6071 /* Check for overflow if required. */
6072 if ((r_type == R_ARM_ALU_PC_G0
6073 || r_type == R_ARM_ALU_PC_G1
6074 || r_type == R_ARM_ALU_PC_G2
6075 || r_type == R_ARM_ALU_SB_G0
6076 || r_type == R_ARM_ALU_SB_G1
6077 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
6078 {
6079 (*_bfd_error_handler)
6080 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6081 input_bfd, input_section,
6082 (long) rel->r_offset, abs (signed_value), howto->name);
6083 return bfd_reloc_overflow;
6084 }
6085
6086 /* Mask out the value and the ADD/SUB part of the opcode; take care
6087 not to destroy the S bit. */
6088 insn &= 0xff1ff000;
6089
6090 /* Set the opcode according to whether the value to go in the
6091 place is negative. */
6092 if (signed_value < 0)
6093 insn |= 1 << 22;
6094 else
6095 insn |= 1 << 23;
6096
6097 /* Encode the offset. */
6098 insn |= g_n;
6099
6100 bfd_put_32 (input_bfd, insn, hit_data);
6101 }
6102 return bfd_reloc_ok;
6103
6104 case R_ARM_LDR_PC_G0:
6105 case R_ARM_LDR_PC_G1:
6106 case R_ARM_LDR_PC_G2:
6107 case R_ARM_LDR_SB_G0:
6108 case R_ARM_LDR_SB_G1:
6109 case R_ARM_LDR_SB_G2:
6110 {
6111 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6112 bfd_vma pc = input_section->output_section->vma
6113 + input_section->output_offset + rel->r_offset;
6114 bfd_vma sb = 0; /* See note above. */
6115 bfd_vma residual;
6116 bfd_signed_vma signed_value;
6117 int group = 0;
6118
6119 /* Determine which groups of bits to calculate. */
6120 switch (r_type)
6121 {
6122 case R_ARM_LDR_PC_G0:
6123 case R_ARM_LDR_SB_G0:
6124 group = 0;
6125 break;
6126
6127 case R_ARM_LDR_PC_G1:
6128 case R_ARM_LDR_SB_G1:
6129 group = 1;
6130 break;
6131
6132 case R_ARM_LDR_PC_G2:
6133 case R_ARM_LDR_SB_G2:
6134 group = 2;
6135 break;
6136
6137 default:
6138 abort();
6139 }
6140
6141 /* If REL, extract the addend from the insn. If RELA, it will
6142 have already been fetched for us. */
6143 if (globals->use_rel)
6144 {
6145 int negative = (insn & (1 << 23)) ? 1 : -1;
6146 signed_addend = negative * (insn & 0xfff);
6147 }
6148
6149 /* Compute the value (X) to go in the place. */
6150 if (r_type == R_ARM_LDR_PC_G0
6151 || r_type == R_ARM_LDR_PC_G1
6152 || r_type == R_ARM_LDR_PC_G2)
6153 /* PC relative. */
6154 signed_value = value - pc + signed_addend;
6155 else
6156 /* Section base relative. */
6157 signed_value = value - sb + signed_addend;
6158
6159 /* Calculate the value of the relevant G_{n-1} to obtain
6160 the residual at that stage. */
6161 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6162
6163 /* Check for overflow. */
6164 if (residual >= 0x1000)
6165 {
6166 (*_bfd_error_handler)
6167 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6168 input_bfd, input_section,
6169 (long) rel->r_offset, abs (signed_value), howto->name);
6170 return bfd_reloc_overflow;
6171 }
6172
6173 /* Mask out the value and U bit. */
6174 insn &= 0xff7ff000;
6175
6176 /* Set the U bit if the value to go in the place is non-negative. */
6177 if (signed_value >= 0)
6178 insn |= 1 << 23;
6179
6180 /* Encode the offset. */
6181 insn |= residual;
6182
6183 bfd_put_32 (input_bfd, insn, hit_data);
6184 }
6185 return bfd_reloc_ok;
6186
6187 case R_ARM_LDRS_PC_G0:
6188 case R_ARM_LDRS_PC_G1:
6189 case R_ARM_LDRS_PC_G2:
6190 case R_ARM_LDRS_SB_G0:
6191 case R_ARM_LDRS_SB_G1:
6192 case R_ARM_LDRS_SB_G2:
6193 {
6194 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6195 bfd_vma pc = input_section->output_section->vma
6196 + input_section->output_offset + rel->r_offset;
6197 bfd_vma sb = 0; /* See note above. */
6198 bfd_vma residual;
6199 bfd_signed_vma signed_value;
6200 int group = 0;
6201
6202 /* Determine which groups of bits to calculate. */
6203 switch (r_type)
6204 {
6205 case R_ARM_LDRS_PC_G0:
6206 case R_ARM_LDRS_SB_G0:
6207 group = 0;
6208 break;
6209
6210 case R_ARM_LDRS_PC_G1:
6211 case R_ARM_LDRS_SB_G1:
6212 group = 1;
6213 break;
6214
6215 case R_ARM_LDRS_PC_G2:
6216 case R_ARM_LDRS_SB_G2:
6217 group = 2;
6218 break;
6219
6220 default:
6221 abort();
6222 }
6223
6224 /* If REL, extract the addend from the insn. If RELA, it will
6225 have already been fetched for us. */
6226 if (globals->use_rel)
6227 {
6228 int negative = (insn & (1 << 23)) ? 1 : -1;
6229 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
6230 }
6231
6232 /* Compute the value (X) to go in the place. */
6233 if (r_type == R_ARM_LDRS_PC_G0
6234 || r_type == R_ARM_LDRS_PC_G1
6235 || r_type == R_ARM_LDRS_PC_G2)
6236 /* PC relative. */
6237 signed_value = value - pc + signed_addend;
6238 else
6239 /* Section base relative. */
6240 signed_value = value - sb + signed_addend;
6241
6242 /* Calculate the value of the relevant G_{n-1} to obtain
6243 the residual at that stage. */
6244 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6245
6246 /* Check for overflow. */
6247 if (residual >= 0x100)
6248 {
6249 (*_bfd_error_handler)
6250 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6251 input_bfd, input_section,
6252 (long) rel->r_offset, abs (signed_value), howto->name);
6253 return bfd_reloc_overflow;
6254 }
6255
6256 /* Mask out the value and U bit. */
6257 insn &= 0xff7ff0f0;
6258
6259 /* Set the U bit if the value to go in the place is non-negative. */
6260 if (signed_value >= 0)
6261 insn |= 1 << 23;
6262
6263 /* Encode the offset. */
6264 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
6265
6266 bfd_put_32 (input_bfd, insn, hit_data);
6267 }
6268 return bfd_reloc_ok;
6269
6270 case R_ARM_LDC_PC_G0:
6271 case R_ARM_LDC_PC_G1:
6272 case R_ARM_LDC_PC_G2:
6273 case R_ARM_LDC_SB_G0:
6274 case R_ARM_LDC_SB_G1:
6275 case R_ARM_LDC_SB_G2:
6276 {
6277 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6278 bfd_vma pc = input_section->output_section->vma
6279 + input_section->output_offset + rel->r_offset;
6280 bfd_vma sb = 0; /* See note above. */
6281 bfd_vma residual;
6282 bfd_signed_vma signed_value;
6283 int group = 0;
6284
6285 /* Determine which groups of bits to calculate. */
6286 switch (r_type)
6287 {
6288 case R_ARM_LDC_PC_G0:
6289 case R_ARM_LDC_SB_G0:
6290 group = 0;
6291 break;
6292
6293 case R_ARM_LDC_PC_G1:
6294 case R_ARM_LDC_SB_G1:
6295 group = 1;
6296 break;
6297
6298 case R_ARM_LDC_PC_G2:
6299 case R_ARM_LDC_SB_G2:
6300 group = 2;
6301 break;
6302
6303 default:
6304 abort();
6305 }
6306
6307 /* If REL, extract the addend from the insn. If RELA, it will
6308 have already been fetched for us. */
6309 if (globals->use_rel)
6310 {
6311 int negative = (insn & (1 << 23)) ? 1 : -1;
6312 signed_addend = negative * ((insn & 0xff) << 2);
6313 }
6314
6315 /* Compute the value (X) to go in the place. */
6316 if (r_type == R_ARM_LDC_PC_G0
6317 || r_type == R_ARM_LDC_PC_G1
6318 || r_type == R_ARM_LDC_PC_G2)
6319 /* PC relative. */
6320 signed_value = value - pc + signed_addend;
6321 else
6322 /* Section base relative. */
6323 signed_value = value - sb + signed_addend;
6324
6325 /* Calculate the value of the relevant G_{n-1} to obtain
6326 the residual at that stage. */
6327 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6328
6329 /* Check for overflow. (The absolute value to go in the place must be
6330 divisible by four and, after having been divided by four, must
6331 fit in eight bits.) */
6332 if ((residual & 0x3) != 0 || residual >= 0x400)
6333 {
6334 (*_bfd_error_handler)
6335 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6336 input_bfd, input_section,
6337 (long) rel->r_offset, abs (signed_value), howto->name);
6338 return bfd_reloc_overflow;
6339 }
6340
6341 /* Mask out the value and U bit. */
6342 insn &= 0xff7fff00;
6343
6344 /* Set the U bit if the value to go in the place is non-negative. */
6345 if (signed_value >= 0)
6346 insn |= 1 << 23;
6347
6348 /* Encode the offset. */
6349 insn |= residual >> 2;
6350
6351 bfd_put_32 (input_bfd, insn, hit_data);
6352 }
6353 return bfd_reloc_ok;
6354
6355 default:
6356 return bfd_reloc_notsupported;
6357 }
6358 }
6359
6360 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
6361 static void
6362 arm_add_to_rel (bfd * abfd,
6363 bfd_byte * address,
6364 reloc_howto_type * howto,
6365 bfd_signed_vma increment)
6366 {
6367 bfd_signed_vma addend;
6368
6369 if (howto->type == R_ARM_THM_CALL
6370 || howto->type == R_ARM_THM_JUMP24)
6371 {
6372 int upper_insn, lower_insn;
6373 int upper, lower;
6374
6375 upper_insn = bfd_get_16 (abfd, address);
6376 lower_insn = bfd_get_16 (abfd, address + 2);
6377 upper = upper_insn & 0x7ff;
6378 lower = lower_insn & 0x7ff;
6379
6380 addend = (upper << 12) | (lower << 1);
6381 addend += increment;
6382 addend >>= 1;
6383
6384 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
6385 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
6386
6387 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
6388 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
6389 }
6390 else
6391 {
6392 bfd_vma contents;
6393
6394 contents = bfd_get_32 (abfd, address);
6395
6396 /* Get the (signed) value from the instruction. */
6397 addend = contents & howto->src_mask;
6398 if (addend & ((howto->src_mask + 1) >> 1))
6399 {
6400 bfd_signed_vma mask;
6401
6402 mask = -1;
6403 mask &= ~ howto->src_mask;
6404 addend |= mask;
6405 }
6406
6407 /* Add in the increment, (which is a byte value). */
6408 switch (howto->type)
6409 {
6410 default:
6411 addend += increment;
6412 break;
6413
6414 case R_ARM_PC24:
6415 case R_ARM_PLT32:
6416 case R_ARM_CALL:
6417 case R_ARM_JUMP24:
6418 addend <<= howto->size;
6419 addend += increment;
6420
6421 /* Should we check for overflow here ? */
6422
6423 /* Drop any undesired bits. */
6424 addend >>= howto->rightshift;
6425 break;
6426 }
6427
6428 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
6429
6430 bfd_put_32 (abfd, contents, address);
6431 }
6432 }
6433
6434 #define IS_ARM_TLS_RELOC(R_TYPE) \
6435 ((R_TYPE) == R_ARM_TLS_GD32 \
6436 || (R_TYPE) == R_ARM_TLS_LDO32 \
6437 || (R_TYPE) == R_ARM_TLS_LDM32 \
6438 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
6439 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
6440 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
6441 || (R_TYPE) == R_ARM_TLS_LE32 \
6442 || (R_TYPE) == R_ARM_TLS_IE32)
6443
6444 /* Relocate an ARM ELF section. */
6445 static bfd_boolean
6446 elf32_arm_relocate_section (bfd * output_bfd,
6447 struct bfd_link_info * info,
6448 bfd * input_bfd,
6449 asection * input_section,
6450 bfd_byte * contents,
6451 Elf_Internal_Rela * relocs,
6452 Elf_Internal_Sym * local_syms,
6453 asection ** local_sections)
6454 {
6455 Elf_Internal_Shdr *symtab_hdr;
6456 struct elf_link_hash_entry **sym_hashes;
6457 Elf_Internal_Rela *rel;
6458 Elf_Internal_Rela *relend;
6459 const char *name;
6460 struct elf32_arm_link_hash_table * globals;
6461
6462 globals = elf32_arm_hash_table (info);
6463
6464 symtab_hdr = & elf_symtab_hdr (input_bfd);
6465 sym_hashes = elf_sym_hashes (input_bfd);
6466
6467 rel = relocs;
6468 relend = relocs + input_section->reloc_count;
6469 for (; rel < relend; rel++)
6470 {
6471 int r_type;
6472 reloc_howto_type * howto;
6473 unsigned long r_symndx;
6474 Elf_Internal_Sym * sym;
6475 asection * sec;
6476 struct elf_link_hash_entry * h;
6477 bfd_vma relocation;
6478 bfd_reloc_status_type r;
6479 arelent bfd_reloc;
6480 char sym_type;
6481 bfd_boolean unresolved_reloc = FALSE;
6482 char *error_message = NULL;
6483
6484 r_symndx = ELF32_R_SYM (rel->r_info);
6485 r_type = ELF32_R_TYPE (rel->r_info);
6486 r_type = arm_real_reloc_type (globals, r_type);
6487
6488 if ( r_type == R_ARM_GNU_VTENTRY
6489 || r_type == R_ARM_GNU_VTINHERIT)
6490 continue;
6491
6492 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
6493 howto = bfd_reloc.howto;
6494
6495 h = NULL;
6496 sym = NULL;
6497 sec = NULL;
6498
6499 if (r_symndx < symtab_hdr->sh_info)
6500 {
6501 sym = local_syms + r_symndx;
6502 sym_type = ELF32_ST_TYPE (sym->st_info);
6503 sec = local_sections[r_symndx];
6504 if (globals->use_rel)
6505 {
6506 relocation = (sec->output_section->vma
6507 + sec->output_offset
6508 + sym->st_value);
6509 if (!info->relocatable
6510 && (sec->flags & SEC_MERGE)
6511 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6512 {
6513 asection *msec;
6514 bfd_vma addend, value;
6515
6516 switch (r_type)
6517 {
6518 case R_ARM_MOVW_ABS_NC:
6519 case R_ARM_MOVT_ABS:
6520 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
6521 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
6522 addend = (addend ^ 0x8000) - 0x8000;
6523 break;
6524
6525 case R_ARM_THM_MOVW_ABS_NC:
6526 case R_ARM_THM_MOVT_ABS:
6527 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
6528 << 16;
6529 value |= bfd_get_16 (input_bfd,
6530 contents + rel->r_offset + 2);
6531 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
6532 | ((value & 0x04000000) >> 15);
6533 addend = (addend ^ 0x8000) - 0x8000;
6534 break;
6535
6536 default:
6537 if (howto->rightshift
6538 || (howto->src_mask & (howto->src_mask + 1)))
6539 {
6540 (*_bfd_error_handler)
6541 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
6542 input_bfd, input_section,
6543 (long) rel->r_offset, howto->name);
6544 return FALSE;
6545 }
6546
6547 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
6548
6549 /* Get the (signed) value from the instruction. */
6550 addend = value & howto->src_mask;
6551 if (addend & ((howto->src_mask + 1) >> 1))
6552 {
6553 bfd_signed_vma mask;
6554
6555 mask = -1;
6556 mask &= ~ howto->src_mask;
6557 addend |= mask;
6558 }
6559 break;
6560 }
6561
6562 msec = sec;
6563 addend =
6564 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
6565 - relocation;
6566 addend += msec->output_section->vma + msec->output_offset;
6567
6568 /* Cases here must match those in the preceeding
6569 switch statement. */
6570 switch (r_type)
6571 {
6572 case R_ARM_MOVW_ABS_NC:
6573 case R_ARM_MOVT_ABS:
6574 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
6575 | (addend & 0xfff);
6576 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
6577 break;
6578
6579 case R_ARM_THM_MOVW_ABS_NC:
6580 case R_ARM_THM_MOVT_ABS:
6581 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
6582 | (addend & 0xff) | ((addend & 0x0800) << 15);
6583 bfd_put_16 (input_bfd, value >> 16,
6584 contents + rel->r_offset);
6585 bfd_put_16 (input_bfd, value,
6586 contents + rel->r_offset + 2);
6587 break;
6588
6589 default:
6590 value = (value & ~ howto->dst_mask)
6591 | (addend & howto->dst_mask);
6592 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
6593 break;
6594 }
6595 }
6596 }
6597 else
6598 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6599 }
6600 else
6601 {
6602 bfd_boolean warned;
6603
6604 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6605 r_symndx, symtab_hdr, sym_hashes,
6606 h, sec, relocation,
6607 unresolved_reloc, warned);
6608
6609 sym_type = h->type;
6610 }
6611
6612 if (sec != NULL && elf_discarded_section (sec))
6613 {
6614 /* For relocs against symbols from removed linkonce sections,
6615 or sections discarded by a linker script, we just want the
6616 section contents zeroed. Avoid any special processing. */
6617 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6618 rel->r_info = 0;
6619 rel->r_addend = 0;
6620 continue;
6621 }
6622
6623 if (info->relocatable)
6624 {
6625 /* This is a relocatable link. We don't have to change
6626 anything, unless the reloc is against a section symbol,
6627 in which case we have to adjust according to where the
6628 section symbol winds up in the output section. */
6629 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6630 {
6631 if (globals->use_rel)
6632 arm_add_to_rel (input_bfd, contents + rel->r_offset,
6633 howto, (bfd_signed_vma) sec->output_offset);
6634 else
6635 rel->r_addend += sec->output_offset;
6636 }
6637 continue;
6638 }
6639
6640 if (h != NULL)
6641 name = h->root.root.string;
6642 else
6643 {
6644 name = (bfd_elf_string_from_elf_section
6645 (input_bfd, symtab_hdr->sh_link, sym->st_name));
6646 if (name == NULL || *name == '\0')
6647 name = bfd_section_name (input_bfd, sec);
6648 }
6649
6650 if (r_symndx != 0
6651 && r_type != R_ARM_NONE
6652 && (h == NULL
6653 || h->root.type == bfd_link_hash_defined
6654 || h->root.type == bfd_link_hash_defweak)
6655 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
6656 {
6657 (*_bfd_error_handler)
6658 ((sym_type == STT_TLS
6659 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
6660 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
6661 input_bfd,
6662 input_section,
6663 (long) rel->r_offset,
6664 howto->name,
6665 name);
6666 }
6667
6668 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
6669 input_section, contents, rel,
6670 relocation, info, sec, name,
6671 (h ? ELF_ST_TYPE (h->type) :
6672 ELF_ST_TYPE (sym->st_info)), h,
6673 &unresolved_reloc, &error_message);
6674
6675 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6676 because such sections are not SEC_ALLOC and thus ld.so will
6677 not process them. */
6678 if (unresolved_reloc
6679 && !((input_section->flags & SEC_DEBUGGING) != 0
6680 && h->def_dynamic))
6681 {
6682 (*_bfd_error_handler)
6683 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6684 input_bfd,
6685 input_section,
6686 (long) rel->r_offset,
6687 howto->name,
6688 h->root.root.string);
6689 return FALSE;
6690 }
6691
6692 if (r != bfd_reloc_ok)
6693 {
6694 switch (r)
6695 {
6696 case bfd_reloc_overflow:
6697 /* If the overflowing reloc was to an undefined symbol,
6698 we have already printed one error message and there
6699 is no point complaining again. */
6700 if ((! h ||
6701 h->root.type != bfd_link_hash_undefined)
6702 && (!((*info->callbacks->reloc_overflow)
6703 (info, (h ? &h->root : NULL), name, howto->name,
6704 (bfd_vma) 0, input_bfd, input_section,
6705 rel->r_offset))))
6706 return FALSE;
6707 break;
6708
6709 case bfd_reloc_undefined:
6710 if (!((*info->callbacks->undefined_symbol)
6711 (info, name, input_bfd, input_section,
6712 rel->r_offset, TRUE)))
6713 return FALSE;
6714 break;
6715
6716 case bfd_reloc_outofrange:
6717 error_message = _("out of range");
6718 goto common_error;
6719
6720 case bfd_reloc_notsupported:
6721 error_message = _("unsupported relocation");
6722 goto common_error;
6723
6724 case bfd_reloc_dangerous:
6725 /* error_message should already be set. */
6726 goto common_error;
6727
6728 default:
6729 error_message = _("unknown error");
6730 /* fall through */
6731
6732 common_error:
6733 BFD_ASSERT (error_message != NULL);
6734 if (!((*info->callbacks->reloc_dangerous)
6735 (info, error_message, input_bfd, input_section,
6736 rel->r_offset)))
6737 return FALSE;
6738 break;
6739 }
6740 }
6741 }
6742
6743 return TRUE;
6744 }
6745
6746 /* Set the right machine number. */
6747
6748 static bfd_boolean
6749 elf32_arm_object_p (bfd *abfd)
6750 {
6751 unsigned int mach;
6752
6753 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
6754
6755 if (mach != bfd_mach_arm_unknown)
6756 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6757
6758 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
6759 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
6760
6761 else
6762 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6763
6764 return TRUE;
6765 }
6766
6767 /* Function to keep ARM specific flags in the ELF header. */
6768
6769 static bfd_boolean
6770 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
6771 {
6772 if (elf_flags_init (abfd)
6773 && elf_elfheader (abfd)->e_flags != flags)
6774 {
6775 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
6776 {
6777 if (flags & EF_ARM_INTERWORK)
6778 (*_bfd_error_handler)
6779 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
6780 abfd);
6781 else
6782 _bfd_error_handler
6783 (_("Warning: Clearing the interworking flag of %B due to outside request"),
6784 abfd);
6785 }
6786 }
6787 else
6788 {
6789 elf_elfheader (abfd)->e_flags = flags;
6790 elf_flags_init (abfd) = TRUE;
6791 }
6792
6793 return TRUE;
6794 }
6795
6796 /* Copy backend specific data from one object module to another. */
6797
6798 static bfd_boolean
6799 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6800 {
6801 flagword in_flags;
6802 flagword out_flags;
6803
6804 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
6805 return TRUE;
6806
6807 in_flags = elf_elfheader (ibfd)->e_flags;
6808 out_flags = elf_elfheader (obfd)->e_flags;
6809
6810 if (elf_flags_init (obfd)
6811 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
6812 && in_flags != out_flags)
6813 {
6814 /* Cannot mix APCS26 and APCS32 code. */
6815 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
6816 return FALSE;
6817
6818 /* Cannot mix float APCS and non-float APCS code. */
6819 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
6820 return FALSE;
6821
6822 /* If the src and dest have different interworking flags
6823 then turn off the interworking bit. */
6824 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
6825 {
6826 if (out_flags & EF_ARM_INTERWORK)
6827 _bfd_error_handler
6828 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
6829 obfd, ibfd);
6830
6831 in_flags &= ~EF_ARM_INTERWORK;
6832 }
6833
6834 /* Likewise for PIC, though don't warn for this case. */
6835 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
6836 in_flags &= ~EF_ARM_PIC;
6837 }
6838
6839 elf_elfheader (obfd)->e_flags = in_flags;
6840 elf_flags_init (obfd) = TRUE;
6841
6842 /* Also copy the EI_OSABI field. */
6843 elf_elfheader (obfd)->e_ident[EI_OSABI] =
6844 elf_elfheader (ibfd)->e_ident[EI_OSABI];
6845
6846 /* Copy object attributes. */
6847 _bfd_elf_copy_obj_attributes (ibfd, obfd);
6848
6849 return TRUE;
6850 }
6851
6852 /* Values for Tag_ABI_PCS_R9_use. */
6853 enum
6854 {
6855 AEABI_R9_V6,
6856 AEABI_R9_SB,
6857 AEABI_R9_TLS,
6858 AEABI_R9_unused
6859 };
6860
6861 /* Values for Tag_ABI_PCS_RW_data. */
6862 enum
6863 {
6864 AEABI_PCS_RW_data_absolute,
6865 AEABI_PCS_RW_data_PCrel,
6866 AEABI_PCS_RW_data_SBrel,
6867 AEABI_PCS_RW_data_unused
6868 };
6869
6870 /* Values for Tag_ABI_enum_size. */
6871 enum
6872 {
6873 AEABI_enum_unused,
6874 AEABI_enum_short,
6875 AEABI_enum_wide,
6876 AEABI_enum_forced_wide
6877 };
6878
6879 /* Determine whether an object attribute tag takes an integer, a
6880 string or both. */
6881 static int
6882 elf32_arm_obj_attrs_arg_type (int tag)
6883 {
6884 if (tag == Tag_compatibility)
6885 return 3;
6886 else if (tag == 4 || tag == 5)
6887 return 2;
6888 else if (tag < 32)
6889 return 1;
6890 else
6891 return (tag & 1) != 0 ? 2 : 1;
6892 }
6893
6894 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
6895 are conflicting attributes. */
6896 static bfd_boolean
6897 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
6898 {
6899 obj_attribute *in_attr;
6900 obj_attribute *out_attr;
6901 obj_attribute_list *in_list;
6902 /* Some tags have 0 = don't care, 1 = strong requirement,
6903 2 = weak requirement. */
6904 static const int order_312[3] = {3, 1, 2};
6905 /* For use with Tag_VFP_arch. */
6906 static const int order_01243[5] = {0, 1, 2, 4, 3};
6907 int i;
6908
6909 if (!elf_known_obj_attributes_proc (obfd)[0].i)
6910 {
6911 /* This is the first object. Copy the attributes. */
6912 _bfd_elf_copy_obj_attributes (ibfd, obfd);
6913
6914 /* Use the Tag_null value to indicate the attributes have been
6915 initialized. */
6916 elf_known_obj_attributes_proc (obfd)[0].i = 1;
6917
6918 return TRUE;
6919 }
6920
6921 in_attr = elf_known_obj_attributes_proc (ibfd);
6922 out_attr = elf_known_obj_attributes_proc (obfd);
6923 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
6924 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
6925 {
6926 /* Ignore mismatches if teh object doesn't use floating point. */
6927 if (out_attr[Tag_ABI_FP_number_model].i == 0)
6928 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
6929 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
6930 {
6931 _bfd_error_handler
6932 (_("ERROR: %B uses VFP register arguments, %B does not"),
6933 ibfd, obfd);
6934 return FALSE;
6935 }
6936 }
6937
6938 for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
6939 {
6940 /* Merge this attribute with existing attributes. */
6941 switch (i)
6942 {
6943 case Tag_CPU_raw_name:
6944 case Tag_CPU_name:
6945 /* Use whichever has the greatest architecture requirements. We
6946 won't necessarily have both the above tags, so make sure input
6947 name is non-NULL. */
6948 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i
6949 && in_attr[i].s)
6950 out_attr[i].s = _bfd_elf_attr_strdup (obfd, in_attr[i].s);
6951 break;
6952
6953 case Tag_ABI_optimization_goals:
6954 case Tag_ABI_FP_optimization_goals:
6955 /* Use the first value seen. */
6956 break;
6957
6958 case Tag_CPU_arch:
6959 case Tag_ARM_ISA_use:
6960 case Tag_THUMB_ISA_use:
6961 case Tag_WMMX_arch:
6962 case Tag_NEON_arch:
6963 /* ??? Do NEON and WMMX conflict? */
6964 case Tag_ABI_FP_rounding:
6965 case Tag_ABI_FP_denormal:
6966 case Tag_ABI_FP_exceptions:
6967 case Tag_ABI_FP_user_exceptions:
6968 case Tag_ABI_FP_number_model:
6969 case Tag_ABI_align8_preserved:
6970 case Tag_ABI_HardFP_use:
6971 /* Use the largest value specified. */
6972 if (in_attr[i].i > out_attr[i].i)
6973 out_attr[i].i = in_attr[i].i;
6974 break;
6975
6976 case Tag_CPU_arch_profile:
6977 /* Warn if conflicting architecture profiles used. */
6978 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
6979 {
6980 _bfd_error_handler
6981 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
6982 ibfd, in_attr[i].i, out_attr[i].i);
6983 return FALSE;
6984 }
6985 if (in_attr[i].i)
6986 out_attr[i].i = in_attr[i].i;
6987 break;
6988 case Tag_VFP_arch:
6989 if (in_attr[i].i > 4 || out_attr[i].i > 4
6990 || order_01243[in_attr[i].i] > order_01243[out_attr[i].i])
6991 out_attr[i].i = in_attr[i].i;
6992 break;
6993 case Tag_PCS_config:
6994 if (out_attr[i].i == 0)
6995 out_attr[i].i = in_attr[i].i;
6996 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
6997 {
6998 /* It's sometimes ok to mix different configs, so this is only
6999 a warning. */
7000 _bfd_error_handler
7001 (_("Warning: %B: Conflicting platform configuration"), ibfd);
7002 }
7003 break;
7004 case Tag_ABI_PCS_R9_use:
7005 if (in_attr[i].i != out_attr[i].i
7006 && out_attr[i].i != AEABI_R9_unused
7007 && in_attr[i].i != AEABI_R9_unused)
7008 {
7009 _bfd_error_handler
7010 (_("ERROR: %B: Conflicting use of R9"), ibfd);
7011 return FALSE;
7012 }
7013 if (out_attr[i].i == AEABI_R9_unused)
7014 out_attr[i].i = in_attr[i].i;
7015 break;
7016 case Tag_ABI_PCS_RW_data:
7017 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
7018 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
7019 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
7020 {
7021 _bfd_error_handler
7022 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
7023 ibfd);
7024 return FALSE;
7025 }
7026 /* Use the smallest value specified. */
7027 if (in_attr[i].i < out_attr[i].i)
7028 out_attr[i].i = in_attr[i].i;
7029 break;
7030 case Tag_ABI_PCS_RO_data:
7031 /* Use the smallest value specified. */
7032 if (in_attr[i].i < out_attr[i].i)
7033 out_attr[i].i = in_attr[i].i;
7034 break;
7035 case Tag_ABI_PCS_GOT_use:
7036 if (in_attr[i].i > 2 || out_attr[i].i > 2
7037 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
7038 out_attr[i].i = in_attr[i].i;
7039 break;
7040 case Tag_ABI_PCS_wchar_t:
7041 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
7042 {
7043 _bfd_error_handler
7044 (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
7045 return FALSE;
7046 }
7047 if (in_attr[i].i)
7048 out_attr[i].i = in_attr[i].i;
7049 break;
7050 case Tag_ABI_align8_needed:
7051 /* ??? Check against Tag_ABI_align8_preserved. */
7052 if (in_attr[i].i > 2 || out_attr[i].i > 2
7053 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
7054 out_attr[i].i = in_attr[i].i;
7055 break;
7056 case Tag_ABI_enum_size:
7057 if (in_attr[i].i != AEABI_enum_unused)
7058 {
7059 if (out_attr[i].i == AEABI_enum_unused
7060 || out_attr[i].i == AEABI_enum_forced_wide)
7061 {
7062 /* The existing object is compatible with anything.
7063 Use whatever requirements the new object has. */
7064 out_attr[i].i = in_attr[i].i;
7065 }
7066 else if (in_attr[i].i != AEABI_enum_forced_wide
7067 && out_attr[i].i != in_attr[i].i
7068 && !elf_arm_tdata (obfd)->no_enum_size_warning)
7069 {
7070 const char *aeabi_enum_names[] =
7071 { "", "variable-size", "32-bit", "" };
7072 _bfd_error_handler
7073 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
7074 ibfd, aeabi_enum_names[in_attr[i].i],
7075 aeabi_enum_names[out_attr[i].i]);
7076 }
7077 }
7078 break;
7079 case Tag_ABI_VFP_args:
7080 /* Aready done. */
7081 break;
7082 case Tag_ABI_WMMX_args:
7083 if (in_attr[i].i != out_attr[i].i)
7084 {
7085 _bfd_error_handler
7086 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
7087 ibfd, obfd);
7088 return FALSE;
7089 }
7090 break;
7091 default: /* All known attributes should be explicitly covered. */
7092 abort ();
7093 }
7094
7095 if (in_attr[i].type && !out_attr[i].type)
7096 switch (in_attr[i].type)
7097 {
7098 case 1:
7099 if (out_attr[i].i)
7100 out_attr[i].type = 1;
7101 break;
7102
7103 case 2:
7104 if (out_attr[i].s)
7105 out_attr[i].type = 2;
7106 break;
7107
7108 default:
7109 abort ();
7110 }
7111 }
7112
7113 /* Merge Tag_compatibility attributes and any common GNU ones. */
7114 _bfd_elf_merge_object_attributes (ibfd, obfd);
7115
7116 /* Check for any attributes not known on ARM. */
7117 in_list = elf_other_obj_attributes_proc (ibfd);
7118 while (in_list && in_list->tag == Tag_compatibility)
7119 in_list = in_list->next;
7120
7121 for (; in_list; in_list = in_list->next)
7122 {
7123 if ((in_list->tag & 128) < 64)
7124 {
7125 _bfd_error_handler
7126 (_("Warning: %B: Unknown EABI object attribute %d"),
7127 ibfd, in_list->tag);
7128 break;
7129 }
7130 }
7131 return TRUE;
7132 }
7133
7134
7135 /* Return TRUE if the two EABI versions are incompatible. */
7136
7137 static bfd_boolean
7138 elf32_arm_versions_compatible (unsigned iver, unsigned over)
7139 {
7140 /* v4 and v5 are the same spec before and after it was released,
7141 so allow mixing them. */
7142 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
7143 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
7144 return TRUE;
7145
7146 return (iver == over);
7147 }
7148
7149 /* Merge backend specific data from an object file to the output
7150 object file when linking. */
7151
7152 static bfd_boolean
7153 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
7154 {
7155 flagword out_flags;
7156 flagword in_flags;
7157 bfd_boolean flags_compatible = TRUE;
7158 asection *sec;
7159
7160 /* Check if we have the same endianess. */
7161 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
7162 return FALSE;
7163
7164 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
7165 return TRUE;
7166
7167 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
7168 return FALSE;
7169
7170 /* The input BFD must have had its flags initialised. */
7171 /* The following seems bogus to me -- The flags are initialized in
7172 the assembler but I don't think an elf_flags_init field is
7173 written into the object. */
7174 /* BFD_ASSERT (elf_flags_init (ibfd)); */
7175
7176 in_flags = elf_elfheader (ibfd)->e_flags;
7177 out_flags = elf_elfheader (obfd)->e_flags;
7178
7179 if (!elf_flags_init (obfd))
7180 {
7181 /* If the input is the default architecture and had the default
7182 flags then do not bother setting the flags for the output
7183 architecture, instead allow future merges to do this. If no
7184 future merges ever set these flags then they will retain their
7185 uninitialised values, which surprise surprise, correspond
7186 to the default values. */
7187 if (bfd_get_arch_info (ibfd)->the_default
7188 && elf_elfheader (ibfd)->e_flags == 0)
7189 return TRUE;
7190
7191 elf_flags_init (obfd) = TRUE;
7192 elf_elfheader (obfd)->e_flags = in_flags;
7193
7194 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
7195 && bfd_get_arch_info (obfd)->the_default)
7196 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
7197
7198 return TRUE;
7199 }
7200
7201 /* Determine what should happen if the input ARM architecture
7202 does not match the output ARM architecture. */
7203 if (! bfd_arm_merge_machines (ibfd, obfd))
7204 return FALSE;
7205
7206 /* Identical flags must be compatible. */
7207 if (in_flags == out_flags)
7208 return TRUE;
7209
7210 /* Check to see if the input BFD actually contains any sections. If
7211 not, its flags may not have been initialised either, but it
7212 cannot actually cause any incompatiblity. Do not short-circuit
7213 dynamic objects; their section list may be emptied by
7214 elf_link_add_object_symbols.
7215
7216 Also check to see if there are no code sections in the input.
7217 In this case there is no need to check for code specific flags.
7218 XXX - do we need to worry about floating-point format compatability
7219 in data sections ? */
7220 if (!(ibfd->flags & DYNAMIC))
7221 {
7222 bfd_boolean null_input_bfd = TRUE;
7223 bfd_boolean only_data_sections = TRUE;
7224
7225 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7226 {
7227 /* Ignore synthetic glue sections. */
7228 if (strcmp (sec->name, ".glue_7")
7229 && strcmp (sec->name, ".glue_7t"))
7230 {
7231 if ((bfd_get_section_flags (ibfd, sec)
7232 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7233 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7234 only_data_sections = FALSE;
7235
7236 null_input_bfd = FALSE;
7237 break;
7238 }
7239 }
7240
7241 if (null_input_bfd || only_data_sections)
7242 return TRUE;
7243 }
7244
7245 /* Complain about various flag mismatches. */
7246 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
7247 EF_ARM_EABI_VERSION (out_flags)))
7248 {
7249 _bfd_error_handler
7250 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
7251 ibfd, obfd,
7252 (in_flags & EF_ARM_EABIMASK) >> 24,
7253 (out_flags & EF_ARM_EABIMASK) >> 24);
7254 return FALSE;
7255 }
7256
7257 /* Not sure what needs to be checked for EABI versions >= 1. */
7258 /* VxWorks libraries do not use these flags. */
7259 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
7260 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
7261 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
7262 {
7263 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
7264 {
7265 _bfd_error_handler
7266 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
7267 ibfd, obfd,
7268 in_flags & EF_ARM_APCS_26 ? 26 : 32,
7269 out_flags & EF_ARM_APCS_26 ? 26 : 32);
7270 flags_compatible = FALSE;
7271 }
7272
7273 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
7274 {
7275 if (in_flags & EF_ARM_APCS_FLOAT)
7276 _bfd_error_handler
7277 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
7278 ibfd, obfd);
7279 else
7280 _bfd_error_handler
7281 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
7282 ibfd, obfd);
7283
7284 flags_compatible = FALSE;
7285 }
7286
7287 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
7288 {
7289 if (in_flags & EF_ARM_VFP_FLOAT)
7290 _bfd_error_handler
7291 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
7292 ibfd, obfd);
7293 else
7294 _bfd_error_handler
7295 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
7296 ibfd, obfd);
7297
7298 flags_compatible = FALSE;
7299 }
7300
7301 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
7302 {
7303 if (in_flags & EF_ARM_MAVERICK_FLOAT)
7304 _bfd_error_handler
7305 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
7306 ibfd, obfd);
7307 else
7308 _bfd_error_handler
7309 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
7310 ibfd, obfd);
7311
7312 flags_compatible = FALSE;
7313 }
7314
7315 #ifdef EF_ARM_SOFT_FLOAT
7316 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
7317 {
7318 /* We can allow interworking between code that is VFP format
7319 layout, and uses either soft float or integer regs for
7320 passing floating point arguments and results. We already
7321 know that the APCS_FLOAT flags match; similarly for VFP
7322 flags. */
7323 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
7324 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
7325 {
7326 if (in_flags & EF_ARM_SOFT_FLOAT)
7327 _bfd_error_handler
7328 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
7329 ibfd, obfd);
7330 else
7331 _bfd_error_handler
7332 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
7333 ibfd, obfd);
7334
7335 flags_compatible = FALSE;
7336 }
7337 }
7338 #endif
7339
7340 /* Interworking mismatch is only a warning. */
7341 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
7342 {
7343 if (in_flags & EF_ARM_INTERWORK)
7344 {
7345 _bfd_error_handler
7346 (_("Warning: %B supports interworking, whereas %B does not"),
7347 ibfd, obfd);
7348 }
7349 else
7350 {
7351 _bfd_error_handler
7352 (_("Warning: %B does not support interworking, whereas %B does"),
7353 ibfd, obfd);
7354 }
7355 }
7356 }
7357
7358 return flags_compatible;
7359 }
7360
7361 /* Display the flags field. */
7362
7363 static bfd_boolean
7364 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
7365 {
7366 FILE * file = (FILE *) ptr;
7367 unsigned long flags;
7368
7369 BFD_ASSERT (abfd != NULL && ptr != NULL);
7370
7371 /* Print normal ELF private data. */
7372 _bfd_elf_print_private_bfd_data (abfd, ptr);
7373
7374 flags = elf_elfheader (abfd)->e_flags;
7375 /* Ignore init flag - it may not be set, despite the flags field
7376 containing valid data. */
7377
7378 /* xgettext:c-format */
7379 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
7380
7381 switch (EF_ARM_EABI_VERSION (flags))
7382 {
7383 case EF_ARM_EABI_UNKNOWN:
7384 /* The following flag bits are GNU extensions and not part of the
7385 official ARM ELF extended ABI. Hence they are only decoded if
7386 the EABI version is not set. */
7387 if (flags & EF_ARM_INTERWORK)
7388 fprintf (file, _(" [interworking enabled]"));
7389
7390 if (flags & EF_ARM_APCS_26)
7391 fprintf (file, " [APCS-26]");
7392 else
7393 fprintf (file, " [APCS-32]");
7394
7395 if (flags & EF_ARM_VFP_FLOAT)
7396 fprintf (file, _(" [VFP float format]"));
7397 else if (flags & EF_ARM_MAVERICK_FLOAT)
7398 fprintf (file, _(" [Maverick float format]"));
7399 else
7400 fprintf (file, _(" [FPA float format]"));
7401
7402 if (flags & EF_ARM_APCS_FLOAT)
7403 fprintf (file, _(" [floats passed in float registers]"));
7404
7405 if (flags & EF_ARM_PIC)
7406 fprintf (file, _(" [position independent]"));
7407
7408 if (flags & EF_ARM_NEW_ABI)
7409 fprintf (file, _(" [new ABI]"));
7410
7411 if (flags & EF_ARM_OLD_ABI)
7412 fprintf (file, _(" [old ABI]"));
7413
7414 if (flags & EF_ARM_SOFT_FLOAT)
7415 fprintf (file, _(" [software FP]"));
7416
7417 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
7418 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
7419 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
7420 | EF_ARM_MAVERICK_FLOAT);
7421 break;
7422
7423 case EF_ARM_EABI_VER1:
7424 fprintf (file, _(" [Version1 EABI]"));
7425
7426 if (flags & EF_ARM_SYMSARESORTED)
7427 fprintf (file, _(" [sorted symbol table]"));
7428 else
7429 fprintf (file, _(" [unsorted symbol table]"));
7430
7431 flags &= ~ EF_ARM_SYMSARESORTED;
7432 break;
7433
7434 case EF_ARM_EABI_VER2:
7435 fprintf (file, _(" [Version2 EABI]"));
7436
7437 if (flags & EF_ARM_SYMSARESORTED)
7438 fprintf (file, _(" [sorted symbol table]"));
7439 else
7440 fprintf (file, _(" [unsorted symbol table]"));
7441
7442 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
7443 fprintf (file, _(" [dynamic symbols use segment index]"));
7444
7445 if (flags & EF_ARM_MAPSYMSFIRST)
7446 fprintf (file, _(" [mapping symbols precede others]"));
7447
7448 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
7449 | EF_ARM_MAPSYMSFIRST);
7450 break;
7451
7452 case EF_ARM_EABI_VER3:
7453 fprintf (file, _(" [Version3 EABI]"));
7454 break;
7455
7456 case EF_ARM_EABI_VER4:
7457 fprintf (file, _(" [Version4 EABI]"));
7458 goto eabi;
7459
7460 case EF_ARM_EABI_VER5:
7461 fprintf (file, _(" [Version5 EABI]"));
7462 eabi:
7463 if (flags & EF_ARM_BE8)
7464 fprintf (file, _(" [BE8]"));
7465
7466 if (flags & EF_ARM_LE8)
7467 fprintf (file, _(" [LE8]"));
7468
7469 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
7470 break;
7471
7472 default:
7473 fprintf (file, _(" <EABI version unrecognised>"));
7474 break;
7475 }
7476
7477 flags &= ~ EF_ARM_EABIMASK;
7478
7479 if (flags & EF_ARM_RELEXEC)
7480 fprintf (file, _(" [relocatable executable]"));
7481
7482 if (flags & EF_ARM_HASENTRY)
7483 fprintf (file, _(" [has entry point]"));
7484
7485 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
7486
7487 if (flags)
7488 fprintf (file, _("<Unrecognised flag bits set>"));
7489
7490 fputc ('\n', file);
7491
7492 return TRUE;
7493 }
7494
7495 static int
7496 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
7497 {
7498 switch (ELF_ST_TYPE (elf_sym->st_info))
7499 {
7500 case STT_ARM_TFUNC:
7501 return ELF_ST_TYPE (elf_sym->st_info);
7502
7503 case STT_ARM_16BIT:
7504 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
7505 This allows us to distinguish between data used by Thumb instructions
7506 and non-data (which is probably code) inside Thumb regions of an
7507 executable. */
7508 if (type != STT_OBJECT && type != STT_TLS)
7509 return ELF_ST_TYPE (elf_sym->st_info);
7510 break;
7511
7512 default:
7513 break;
7514 }
7515
7516 return type;
7517 }
7518
7519 static asection *
7520 elf32_arm_gc_mark_hook (asection *sec,
7521 struct bfd_link_info *info,
7522 Elf_Internal_Rela *rel,
7523 struct elf_link_hash_entry *h,
7524 Elf_Internal_Sym *sym)
7525 {
7526 if (h != NULL)
7527 switch (ELF32_R_TYPE (rel->r_info))
7528 {
7529 case R_ARM_GNU_VTINHERIT:
7530 case R_ARM_GNU_VTENTRY:
7531 return NULL;
7532 }
7533
7534 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
7535 }
7536
7537 /* Update the got entry reference counts for the section being removed. */
7538
7539 static bfd_boolean
7540 elf32_arm_gc_sweep_hook (bfd * abfd,
7541 struct bfd_link_info * info,
7542 asection * sec,
7543 const Elf_Internal_Rela * relocs)
7544 {
7545 Elf_Internal_Shdr *symtab_hdr;
7546 struct elf_link_hash_entry **sym_hashes;
7547 bfd_signed_vma *local_got_refcounts;
7548 const Elf_Internal_Rela *rel, *relend;
7549 struct elf32_arm_link_hash_table * globals;
7550
7551 if (info->relocatable)
7552 return TRUE;
7553
7554 globals = elf32_arm_hash_table (info);
7555
7556 elf_section_data (sec)->local_dynrel = NULL;
7557
7558 symtab_hdr = & elf_symtab_hdr (abfd);
7559 sym_hashes = elf_sym_hashes (abfd);
7560 local_got_refcounts = elf_local_got_refcounts (abfd);
7561
7562 check_use_blx(globals);
7563
7564 relend = relocs + sec->reloc_count;
7565 for (rel = relocs; rel < relend; rel++)
7566 {
7567 unsigned long r_symndx;
7568 struct elf_link_hash_entry *h = NULL;
7569 int r_type;
7570
7571 r_symndx = ELF32_R_SYM (rel->r_info);
7572 if (r_symndx >= symtab_hdr->sh_info)
7573 {
7574 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7575 while (h->root.type == bfd_link_hash_indirect
7576 || h->root.type == bfd_link_hash_warning)
7577 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7578 }
7579
7580 r_type = ELF32_R_TYPE (rel->r_info);
7581 r_type = arm_real_reloc_type (globals, r_type);
7582 switch (r_type)
7583 {
7584 case R_ARM_GOT32:
7585 case R_ARM_GOT_PREL:
7586 case R_ARM_TLS_GD32:
7587 case R_ARM_TLS_IE32:
7588 if (h != NULL)
7589 {
7590 if (h->got.refcount > 0)
7591 h->got.refcount -= 1;
7592 }
7593 else if (local_got_refcounts != NULL)
7594 {
7595 if (local_got_refcounts[r_symndx] > 0)
7596 local_got_refcounts[r_symndx] -= 1;
7597 }
7598 break;
7599
7600 case R_ARM_TLS_LDM32:
7601 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
7602 break;
7603
7604 case R_ARM_ABS32:
7605 case R_ARM_ABS32_NOI:
7606 case R_ARM_REL32:
7607 case R_ARM_REL32_NOI:
7608 case R_ARM_PC24:
7609 case R_ARM_PLT32:
7610 case R_ARM_CALL:
7611 case R_ARM_JUMP24:
7612 case R_ARM_PREL31:
7613 case R_ARM_THM_CALL:
7614 case R_ARM_THM_JUMP24:
7615 case R_ARM_THM_JUMP19:
7616 case R_ARM_MOVW_ABS_NC:
7617 case R_ARM_MOVT_ABS:
7618 case R_ARM_MOVW_PREL_NC:
7619 case R_ARM_MOVT_PREL:
7620 case R_ARM_THM_MOVW_ABS_NC:
7621 case R_ARM_THM_MOVT_ABS:
7622 case R_ARM_THM_MOVW_PREL_NC:
7623 case R_ARM_THM_MOVT_PREL:
7624 /* Should the interworking branches be here also? */
7625
7626 if (h != NULL)
7627 {
7628 struct elf32_arm_link_hash_entry *eh;
7629 struct elf32_arm_relocs_copied **pp;
7630 struct elf32_arm_relocs_copied *p;
7631
7632 eh = (struct elf32_arm_link_hash_entry *) h;
7633
7634 if (h->plt.refcount > 0)
7635 {
7636 h->plt.refcount -= 1;
7637 if (r_type == R_ARM_THM_CALL)
7638 eh->plt_maybe_thumb_refcount--;
7639
7640 if (r_type == R_ARM_THM_JUMP24
7641 || r_type == R_ARM_THM_JUMP19)
7642 eh->plt_thumb_refcount--;
7643 }
7644
7645 if (r_type == R_ARM_ABS32
7646 || r_type == R_ARM_REL32
7647 || r_type == R_ARM_ABS32_NOI
7648 || r_type == R_ARM_REL32_NOI)
7649 {
7650 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
7651 pp = &p->next)
7652 if (p->section == sec)
7653 {
7654 p->count -= 1;
7655 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
7656 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
7657 p->pc_count -= 1;
7658 if (p->count == 0)
7659 *pp = p->next;
7660 break;
7661 }
7662 }
7663 }
7664 break;
7665
7666 default:
7667 break;
7668 }
7669 }
7670
7671 return TRUE;
7672 }
7673
7674 /* Look through the relocs for a section during the first phase. */
7675
7676 static bfd_boolean
7677 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
7678 asection *sec, const Elf_Internal_Rela *relocs)
7679 {
7680 Elf_Internal_Shdr *symtab_hdr;
7681 struct elf_link_hash_entry **sym_hashes;
7682 const Elf_Internal_Rela *rel;
7683 const Elf_Internal_Rela *rel_end;
7684 bfd *dynobj;
7685 asection *sreloc;
7686 bfd_vma *local_got_offsets;
7687 struct elf32_arm_link_hash_table *htab;
7688 bfd_boolean needs_plt;
7689
7690 if (info->relocatable)
7691 return TRUE;
7692
7693 BFD_ASSERT (is_arm_elf (abfd));
7694
7695 htab = elf32_arm_hash_table (info);
7696 sreloc = NULL;
7697
7698 /* Create dynamic sections for relocatable executables so that we can
7699 copy relocations. */
7700 if (htab->root.is_relocatable_executable
7701 && ! htab->root.dynamic_sections_created)
7702 {
7703 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
7704 return FALSE;
7705 }
7706
7707 dynobj = elf_hash_table (info)->dynobj;
7708 local_got_offsets = elf_local_got_offsets (abfd);
7709
7710 symtab_hdr = & elf_symtab_hdr (abfd);
7711 sym_hashes = elf_sym_hashes (abfd);
7712
7713 rel_end = relocs + sec->reloc_count;
7714 for (rel = relocs; rel < rel_end; rel++)
7715 {
7716 struct elf_link_hash_entry *h;
7717 struct elf32_arm_link_hash_entry *eh;
7718 unsigned long r_symndx;
7719 int r_type;
7720
7721 r_symndx = ELF32_R_SYM (rel->r_info);
7722 r_type = ELF32_R_TYPE (rel->r_info);
7723 r_type = arm_real_reloc_type (htab, r_type);
7724
7725 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
7726 {
7727 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
7728 r_symndx);
7729 return FALSE;
7730 }
7731
7732 if (r_symndx < symtab_hdr->sh_info)
7733 h = NULL;
7734 else
7735 {
7736 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7737 while (h->root.type == bfd_link_hash_indirect
7738 || h->root.type == bfd_link_hash_warning)
7739 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7740 }
7741
7742 eh = (struct elf32_arm_link_hash_entry *) h;
7743
7744 switch (r_type)
7745 {
7746 case R_ARM_GOT32:
7747 case R_ARM_GOT_PREL:
7748 case R_ARM_TLS_GD32:
7749 case R_ARM_TLS_IE32:
7750 /* This symbol requires a global offset table entry. */
7751 {
7752 int tls_type, old_tls_type;
7753
7754 switch (r_type)
7755 {
7756 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
7757 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
7758 default: tls_type = GOT_NORMAL; break;
7759 }
7760
7761 if (h != NULL)
7762 {
7763 h->got.refcount++;
7764 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
7765 }
7766 else
7767 {
7768 bfd_signed_vma *local_got_refcounts;
7769
7770 /* This is a global offset table entry for a local symbol. */
7771 local_got_refcounts = elf_local_got_refcounts (abfd);
7772 if (local_got_refcounts == NULL)
7773 {
7774 bfd_size_type size;
7775
7776 size = symtab_hdr->sh_info;
7777 size *= (sizeof (bfd_signed_vma) + sizeof(char));
7778 local_got_refcounts = bfd_zalloc (abfd, size);
7779 if (local_got_refcounts == NULL)
7780 return FALSE;
7781 elf_local_got_refcounts (abfd) = local_got_refcounts;
7782 elf32_arm_local_got_tls_type (abfd)
7783 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
7784 }
7785 local_got_refcounts[r_symndx] += 1;
7786 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
7787 }
7788
7789 /* We will already have issued an error message if there is a
7790 TLS / non-TLS mismatch, based on the symbol type. We don't
7791 support any linker relaxations. So just combine any TLS
7792 types needed. */
7793 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
7794 && tls_type != GOT_NORMAL)
7795 tls_type |= old_tls_type;
7796
7797 if (old_tls_type != tls_type)
7798 {
7799 if (h != NULL)
7800 elf32_arm_hash_entry (h)->tls_type = tls_type;
7801 else
7802 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
7803 }
7804 }
7805 /* Fall through */
7806
7807 case R_ARM_TLS_LDM32:
7808 if (r_type == R_ARM_TLS_LDM32)
7809 htab->tls_ldm_got.refcount++;
7810 /* Fall through */
7811
7812 case R_ARM_GOTOFF32:
7813 case R_ARM_GOTPC:
7814 if (htab->sgot == NULL)
7815 {
7816 if (htab->root.dynobj == NULL)
7817 htab->root.dynobj = abfd;
7818 if (!create_got_section (htab->root.dynobj, info))
7819 return FALSE;
7820 }
7821 break;
7822
7823 case R_ARM_ABS12:
7824 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
7825 ldr __GOTT_INDEX__ offsets. */
7826 if (!htab->vxworks_p)
7827 break;
7828 /* Fall through */
7829
7830 case R_ARM_PC24:
7831 case R_ARM_PLT32:
7832 case R_ARM_CALL:
7833 case R_ARM_JUMP24:
7834 case R_ARM_PREL31:
7835 case R_ARM_THM_CALL:
7836 case R_ARM_THM_JUMP24:
7837 case R_ARM_THM_JUMP19:
7838 needs_plt = 1;
7839 goto normal_reloc;
7840
7841 case R_ARM_ABS32:
7842 case R_ARM_ABS32_NOI:
7843 case R_ARM_REL32:
7844 case R_ARM_REL32_NOI:
7845 case R_ARM_MOVW_ABS_NC:
7846 case R_ARM_MOVT_ABS:
7847 case R_ARM_MOVW_PREL_NC:
7848 case R_ARM_MOVT_PREL:
7849 case R_ARM_THM_MOVW_ABS_NC:
7850 case R_ARM_THM_MOVT_ABS:
7851 case R_ARM_THM_MOVW_PREL_NC:
7852 case R_ARM_THM_MOVT_PREL:
7853 needs_plt = 0;
7854 normal_reloc:
7855
7856 /* Should the interworking branches be listed here? */
7857 if (h != NULL)
7858 {
7859 /* If this reloc is in a read-only section, we might
7860 need a copy reloc. We can't check reliably at this
7861 stage whether the section is read-only, as input
7862 sections have not yet been mapped to output sections.
7863 Tentatively set the flag for now, and correct in
7864 adjust_dynamic_symbol. */
7865 if (!info->shared)
7866 h->non_got_ref = 1;
7867
7868 /* We may need a .plt entry if the function this reloc
7869 refers to is in a different object. We can't tell for
7870 sure yet, because something later might force the
7871 symbol local. */
7872 if (needs_plt)
7873 h->needs_plt = 1;
7874
7875 /* If we create a PLT entry, this relocation will reference
7876 it, even if it's an ABS32 relocation. */
7877 h->plt.refcount += 1;
7878
7879 /* It's too early to use htab->use_blx here, so we have to
7880 record possible blx references separately from
7881 relocs that definitely need a thumb stub. */
7882
7883 if (r_type == R_ARM_THM_CALL)
7884 eh->plt_maybe_thumb_refcount += 1;
7885
7886 if (r_type == R_ARM_THM_JUMP24
7887 || r_type == R_ARM_THM_JUMP19)
7888 eh->plt_thumb_refcount += 1;
7889 }
7890
7891 /* If we are creating a shared library or relocatable executable,
7892 and this is a reloc against a global symbol, or a non PC
7893 relative reloc against a local symbol, then we need to copy
7894 the reloc into the shared library. However, if we are linking
7895 with -Bsymbolic, we do not need to copy a reloc against a
7896 global symbol which is defined in an object we are
7897 including in the link (i.e., DEF_REGULAR is set). At
7898 this point we have not seen all the input files, so it is
7899 possible that DEF_REGULAR is not set now but will be set
7900 later (it is never cleared). We account for that
7901 possibility below by storing information in the
7902 relocs_copied field of the hash table entry. */
7903 if ((info->shared || htab->root.is_relocatable_executable)
7904 && (sec->flags & SEC_ALLOC) != 0
7905 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
7906 || (h != NULL && ! h->needs_plt
7907 && (! info->symbolic || ! h->def_regular))))
7908 {
7909 struct elf32_arm_relocs_copied *p, **head;
7910
7911 /* When creating a shared object, we must copy these
7912 reloc types into the output file. We create a reloc
7913 section in dynobj and make room for this reloc. */
7914 if (sreloc == NULL)
7915 {
7916 const char * name;
7917
7918 name = (bfd_elf_string_from_elf_section
7919 (abfd,
7920 elf_elfheader (abfd)->e_shstrndx,
7921 elf_section_data (sec)->rel_hdr.sh_name));
7922 if (name == NULL)
7923 return FALSE;
7924
7925 BFD_ASSERT (reloc_section_p (htab, name, sec));
7926
7927 sreloc = bfd_get_section_by_name (dynobj, name);
7928 if (sreloc == NULL)
7929 {
7930 flagword flags;
7931
7932 flags = (SEC_HAS_CONTENTS | SEC_READONLY
7933 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
7934 if ((sec->flags & SEC_ALLOC) != 0
7935 /* BPABI objects never have dynamic
7936 relocations mapped. */
7937 && !htab->symbian_p)
7938 flags |= SEC_ALLOC | SEC_LOAD;
7939 sreloc = bfd_make_section_with_flags (dynobj,
7940 name,
7941 flags);
7942 if (sreloc == NULL
7943 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
7944 return FALSE;
7945 }
7946
7947 elf_section_data (sec)->sreloc = sreloc;
7948 }
7949
7950 /* If this is a global symbol, we count the number of
7951 relocations we need for this symbol. */
7952 if (h != NULL)
7953 {
7954 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
7955 }
7956 else
7957 {
7958 /* Track dynamic relocs needed for local syms too.
7959 We really need local syms available to do this
7960 easily. Oh well. */
7961
7962 asection *s;
7963 void *vpp;
7964
7965 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
7966 sec, r_symndx);
7967 if (s == NULL)
7968 return FALSE;
7969
7970 vpp = &elf_section_data (s)->local_dynrel;
7971 head = (struct elf32_arm_relocs_copied **) vpp;
7972 }
7973
7974 p = *head;
7975 if (p == NULL || p->section != sec)
7976 {
7977 bfd_size_type amt = sizeof *p;
7978
7979 p = bfd_alloc (htab->root.dynobj, amt);
7980 if (p == NULL)
7981 return FALSE;
7982 p->next = *head;
7983 *head = p;
7984 p->section = sec;
7985 p->count = 0;
7986 p->pc_count = 0;
7987 }
7988
7989 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
7990 p->pc_count += 1;
7991 p->count += 1;
7992 }
7993 break;
7994
7995 /* This relocation describes the C++ object vtable hierarchy.
7996 Reconstruct it for later use during GC. */
7997 case R_ARM_GNU_VTINHERIT:
7998 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
7999 return FALSE;
8000 break;
8001
8002 /* This relocation describes which C++ vtable entries are actually
8003 used. Record for later use during GC. */
8004 case R_ARM_GNU_VTENTRY:
8005 BFD_ASSERT (h != NULL);
8006 if (h != NULL
8007 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
8008 return FALSE;
8009 break;
8010 }
8011 }
8012
8013 return TRUE;
8014 }
8015
8016 /* Unwinding tables are not referenced directly. This pass marks them as
8017 required if the corresponding code section is marked. */
8018
8019 static bfd_boolean
8020 elf32_arm_gc_mark_extra_sections(struct bfd_link_info *info,
8021 elf_gc_mark_hook_fn gc_mark_hook)
8022 {
8023 bfd *sub;
8024 Elf_Internal_Shdr **elf_shdrp;
8025 bfd_boolean again;
8026
8027 /* Marking EH data may cause additional code sections to be marked,
8028 requiring multiple passes. */
8029 again = TRUE;
8030 while (again)
8031 {
8032 again = FALSE;
8033 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
8034 {
8035 asection *o;
8036
8037 if (! is_arm_elf (sub))
8038 continue;
8039
8040 elf_shdrp = elf_elfsections (sub);
8041 for (o = sub->sections; o != NULL; o = o->next)
8042 {
8043 Elf_Internal_Shdr *hdr;
8044
8045 hdr = &elf_section_data (o)->this_hdr;
8046 if (hdr->sh_type == SHT_ARM_EXIDX && hdr->sh_link
8047 && !o->gc_mark
8048 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
8049 {
8050 again = TRUE;
8051 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
8052 return FALSE;
8053 }
8054 }
8055 }
8056 }
8057
8058 return TRUE;
8059 }
8060
8061 /* Treat mapping symbols as special target symbols. */
8062
8063 static bfd_boolean
8064 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
8065 {
8066 return bfd_is_arm_special_symbol_name (sym->name,
8067 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
8068 }
8069
8070 /* This is a copy of elf_find_function() from elf.c except that
8071 ARM mapping symbols are ignored when looking for function names
8072 and STT_ARM_TFUNC is considered to a function type. */
8073
8074 static bfd_boolean
8075 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
8076 asection * section,
8077 asymbol ** symbols,
8078 bfd_vma offset,
8079 const char ** filename_ptr,
8080 const char ** functionname_ptr)
8081 {
8082 const char * filename = NULL;
8083 asymbol * func = NULL;
8084 bfd_vma low_func = 0;
8085 asymbol ** p;
8086
8087 for (p = symbols; *p != NULL; p++)
8088 {
8089 elf_symbol_type *q;
8090
8091 q = (elf_symbol_type *) *p;
8092
8093 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
8094 {
8095 default:
8096 break;
8097 case STT_FILE:
8098 filename = bfd_asymbol_name (&q->symbol);
8099 break;
8100 case STT_FUNC:
8101 case STT_ARM_TFUNC:
8102 case STT_NOTYPE:
8103 /* Skip mapping symbols. */
8104 if ((q->symbol.flags & BSF_LOCAL)
8105 && bfd_is_arm_special_symbol_name (q->symbol.name,
8106 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
8107 continue;
8108 /* Fall through. */
8109 if (bfd_get_section (&q->symbol) == section
8110 && q->symbol.value >= low_func
8111 && q->symbol.value <= offset)
8112 {
8113 func = (asymbol *) q;
8114 low_func = q->symbol.value;
8115 }
8116 break;
8117 }
8118 }
8119
8120 if (func == NULL)
8121 return FALSE;
8122
8123 if (filename_ptr)
8124 *filename_ptr = filename;
8125 if (functionname_ptr)
8126 *functionname_ptr = bfd_asymbol_name (func);
8127
8128 return TRUE;
8129 }
8130
8131
8132 /* Find the nearest line to a particular section and offset, for error
8133 reporting. This code is a duplicate of the code in elf.c, except
8134 that it uses arm_elf_find_function. */
8135
8136 static bfd_boolean
8137 elf32_arm_find_nearest_line (bfd * abfd,
8138 asection * section,
8139 asymbol ** symbols,
8140 bfd_vma offset,
8141 const char ** filename_ptr,
8142 const char ** functionname_ptr,
8143 unsigned int * line_ptr)
8144 {
8145 bfd_boolean found = FALSE;
8146
8147 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
8148
8149 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
8150 filename_ptr, functionname_ptr,
8151 line_ptr, 0,
8152 & elf_tdata (abfd)->dwarf2_find_line_info))
8153 {
8154 if (!*functionname_ptr)
8155 arm_elf_find_function (abfd, section, symbols, offset,
8156 *filename_ptr ? NULL : filename_ptr,
8157 functionname_ptr);
8158
8159 return TRUE;
8160 }
8161
8162 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
8163 & found, filename_ptr,
8164 functionname_ptr, line_ptr,
8165 & elf_tdata (abfd)->line_info))
8166 return FALSE;
8167
8168 if (found && (*functionname_ptr || *line_ptr))
8169 return TRUE;
8170
8171 if (symbols == NULL)
8172 return FALSE;
8173
8174 if (! arm_elf_find_function (abfd, section, symbols, offset,
8175 filename_ptr, functionname_ptr))
8176 return FALSE;
8177
8178 *line_ptr = 0;
8179 return TRUE;
8180 }
8181
8182 static bfd_boolean
8183 elf32_arm_find_inliner_info (bfd * abfd,
8184 const char ** filename_ptr,
8185 const char ** functionname_ptr,
8186 unsigned int * line_ptr)
8187 {
8188 bfd_boolean found;
8189 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
8190 functionname_ptr, line_ptr,
8191 & elf_tdata (abfd)->dwarf2_find_line_info);
8192 return found;
8193 }
8194
8195 /* Adjust a symbol defined by a dynamic object and referenced by a
8196 regular object. The current definition is in some section of the
8197 dynamic object, but we're not including those sections. We have to
8198 change the definition to something the rest of the link can
8199 understand. */
8200
8201 static bfd_boolean
8202 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
8203 struct elf_link_hash_entry * h)
8204 {
8205 bfd * dynobj;
8206 asection * s;
8207 struct elf32_arm_link_hash_entry * eh;
8208 struct elf32_arm_link_hash_table *globals;
8209
8210 globals = elf32_arm_hash_table (info);
8211 dynobj = elf_hash_table (info)->dynobj;
8212
8213 /* Make sure we know what is going on here. */
8214 BFD_ASSERT (dynobj != NULL
8215 && (h->needs_plt
8216 || h->u.weakdef != NULL
8217 || (h->def_dynamic
8218 && h->ref_regular
8219 && !h->def_regular)));
8220
8221 eh = (struct elf32_arm_link_hash_entry *) h;
8222
8223 /* If this is a function, put it in the procedure linkage table. We
8224 will fill in the contents of the procedure linkage table later,
8225 when we know the address of the .got section. */
8226 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
8227 || h->needs_plt)
8228 {
8229 if (h->plt.refcount <= 0
8230 || SYMBOL_CALLS_LOCAL (info, h)
8231 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8232 && h->root.type == bfd_link_hash_undefweak))
8233 {
8234 /* This case can occur if we saw a PLT32 reloc in an input
8235 file, but the symbol was never referred to by a dynamic
8236 object, or if all references were garbage collected. In
8237 such a case, we don't actually need to build a procedure
8238 linkage table, and we can just do a PC24 reloc instead. */
8239 h->plt.offset = (bfd_vma) -1;
8240 eh->plt_thumb_refcount = 0;
8241 eh->plt_maybe_thumb_refcount = 0;
8242 h->needs_plt = 0;
8243 }
8244
8245 return TRUE;
8246 }
8247 else
8248 {
8249 /* It's possible that we incorrectly decided a .plt reloc was
8250 needed for an R_ARM_PC24 or similar reloc to a non-function sym
8251 in check_relocs. We can't decide accurately between function
8252 and non-function syms in check-relocs; Objects loaded later in
8253 the link may change h->type. So fix it now. */
8254 h->plt.offset = (bfd_vma) -1;
8255 eh->plt_thumb_refcount = 0;
8256 eh->plt_maybe_thumb_refcount = 0;
8257 }
8258
8259 /* If this is a weak symbol, and there is a real definition, the
8260 processor independent code will have arranged for us to see the
8261 real definition first, and we can just use the same value. */
8262 if (h->u.weakdef != NULL)
8263 {
8264 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
8265 || h->u.weakdef->root.type == bfd_link_hash_defweak);
8266 h->root.u.def.section = h->u.weakdef->root.u.def.section;
8267 h->root.u.def.value = h->u.weakdef->root.u.def.value;
8268 return TRUE;
8269 }
8270
8271 /* If there are no non-GOT references, we do not need a copy
8272 relocation. */
8273 if (!h->non_got_ref)
8274 return TRUE;
8275
8276 /* This is a reference to a symbol defined by a dynamic object which
8277 is not a function. */
8278
8279 /* If we are creating a shared library, we must presume that the
8280 only references to the symbol are via the global offset table.
8281 For such cases we need not do anything here; the relocations will
8282 be handled correctly by relocate_section. Relocatable executables
8283 can reference data in shared objects directly, so we don't need to
8284 do anything here. */
8285 if (info->shared || globals->root.is_relocatable_executable)
8286 return TRUE;
8287
8288 if (h->size == 0)
8289 {
8290 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
8291 h->root.root.string);
8292 return TRUE;
8293 }
8294
8295 /* We must allocate the symbol in our .dynbss section, which will
8296 become part of the .bss section of the executable. There will be
8297 an entry for this symbol in the .dynsym section. The dynamic
8298 object will contain position independent code, so all references
8299 from the dynamic object to this symbol will go through the global
8300 offset table. The dynamic linker will use the .dynsym entry to
8301 determine the address it must put in the global offset table, so
8302 both the dynamic object and the regular object will refer to the
8303 same memory location for the variable. */
8304 s = bfd_get_section_by_name (dynobj, ".dynbss");
8305 BFD_ASSERT (s != NULL);
8306
8307 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
8308 copy the initial value out of the dynamic object and into the
8309 runtime process image. We need to remember the offset into the
8310 .rel(a).bss section we are going to use. */
8311 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
8312 {
8313 asection *srel;
8314
8315 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
8316 BFD_ASSERT (srel != NULL);
8317 srel->size += RELOC_SIZE (globals);
8318 h->needs_copy = 1;
8319 }
8320
8321 return _bfd_elf_adjust_dynamic_copy (h, s);
8322 }
8323
8324 /* Allocate space in .plt, .got and associated reloc sections for
8325 dynamic relocs. */
8326
8327 static bfd_boolean
8328 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
8329 {
8330 struct bfd_link_info *info;
8331 struct elf32_arm_link_hash_table *htab;
8332 struct elf32_arm_link_hash_entry *eh;
8333 struct elf32_arm_relocs_copied *p;
8334 bfd_signed_vma thumb_refs;
8335
8336 eh = (struct elf32_arm_link_hash_entry *) h;
8337
8338 if (h->root.type == bfd_link_hash_indirect)
8339 return TRUE;
8340
8341 if (h->root.type == bfd_link_hash_warning)
8342 /* When warning symbols are created, they **replace** the "real"
8343 entry in the hash table, thus we never get to see the real
8344 symbol in a hash traversal. So look at it now. */
8345 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8346
8347 info = (struct bfd_link_info *) inf;
8348 htab = elf32_arm_hash_table (info);
8349
8350 if (htab->root.dynamic_sections_created
8351 && h->plt.refcount > 0)
8352 {
8353 /* Make sure this symbol is output as a dynamic symbol.
8354 Undefined weak syms won't yet be marked as dynamic. */
8355 if (h->dynindx == -1
8356 && !h->forced_local)
8357 {
8358 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8359 return FALSE;
8360 }
8361
8362 if (info->shared
8363 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
8364 {
8365 asection *s = htab->splt;
8366
8367 /* If this is the first .plt entry, make room for the special
8368 first entry. */
8369 if (s->size == 0)
8370 s->size += htab->plt_header_size;
8371
8372 h->plt.offset = s->size;
8373
8374 /* If we will insert a Thumb trampoline before this PLT, leave room
8375 for it. */
8376 thumb_refs = eh->plt_thumb_refcount;
8377 if (!htab->use_blx)
8378 thumb_refs += eh->plt_maybe_thumb_refcount;
8379
8380 if (thumb_refs > 0)
8381 {
8382 h->plt.offset += PLT_THUMB_STUB_SIZE;
8383 s->size += PLT_THUMB_STUB_SIZE;
8384 }
8385
8386 /* If this symbol is not defined in a regular file, and we are
8387 not generating a shared library, then set the symbol to this
8388 location in the .plt. This is required to make function
8389 pointers compare as equal between the normal executable and
8390 the shared library. */
8391 if (! info->shared
8392 && !h->def_regular)
8393 {
8394 h->root.u.def.section = s;
8395 h->root.u.def.value = h->plt.offset;
8396
8397 /* Make sure the function is not marked as Thumb, in case
8398 it is the target of an ABS32 relocation, which will
8399 point to the PLT entry. */
8400 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
8401 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8402 }
8403
8404 /* Make room for this entry. */
8405 s->size += htab->plt_entry_size;
8406
8407 if (!htab->symbian_p)
8408 {
8409 /* We also need to make an entry in the .got.plt section, which
8410 will be placed in the .got section by the linker script. */
8411 eh->plt_got_offset = htab->sgotplt->size;
8412 htab->sgotplt->size += 4;
8413 }
8414
8415 /* We also need to make an entry in the .rel(a).plt section. */
8416 htab->srelplt->size += RELOC_SIZE (htab);
8417
8418 /* VxWorks executables have a second set of relocations for
8419 each PLT entry. They go in a separate relocation section,
8420 which is processed by the kernel loader. */
8421 if (htab->vxworks_p && !info->shared)
8422 {
8423 /* There is a relocation for the initial PLT entry:
8424 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
8425 if (h->plt.offset == htab->plt_header_size)
8426 htab->srelplt2->size += RELOC_SIZE (htab);
8427
8428 /* There are two extra relocations for each subsequent
8429 PLT entry: an R_ARM_32 relocation for the GOT entry,
8430 and an R_ARM_32 relocation for the PLT entry. */
8431 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
8432 }
8433 }
8434 else
8435 {
8436 h->plt.offset = (bfd_vma) -1;
8437 h->needs_plt = 0;
8438 }
8439 }
8440 else
8441 {
8442 h->plt.offset = (bfd_vma) -1;
8443 h->needs_plt = 0;
8444 }
8445
8446 if (h->got.refcount > 0)
8447 {
8448 asection *s;
8449 bfd_boolean dyn;
8450 int tls_type = elf32_arm_hash_entry (h)->tls_type;
8451 int indx;
8452
8453 /* Make sure this symbol is output as a dynamic symbol.
8454 Undefined weak syms won't yet be marked as dynamic. */
8455 if (h->dynindx == -1
8456 && !h->forced_local)
8457 {
8458 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8459 return FALSE;
8460 }
8461
8462 if (!htab->symbian_p)
8463 {
8464 s = htab->sgot;
8465 h->got.offset = s->size;
8466
8467 if (tls_type == GOT_UNKNOWN)
8468 abort ();
8469
8470 if (tls_type == GOT_NORMAL)
8471 /* Non-TLS symbols need one GOT slot. */
8472 s->size += 4;
8473 else
8474 {
8475 if (tls_type & GOT_TLS_GD)
8476 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
8477 s->size += 8;
8478 if (tls_type & GOT_TLS_IE)
8479 /* R_ARM_TLS_IE32 needs one GOT slot. */
8480 s->size += 4;
8481 }
8482
8483 dyn = htab->root.dynamic_sections_created;
8484
8485 indx = 0;
8486 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8487 && (!info->shared
8488 || !SYMBOL_REFERENCES_LOCAL (info, h)))
8489 indx = h->dynindx;
8490
8491 if (tls_type != GOT_NORMAL
8492 && (info->shared || indx != 0)
8493 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8494 || h->root.type != bfd_link_hash_undefweak))
8495 {
8496 if (tls_type & GOT_TLS_IE)
8497 htab->srelgot->size += RELOC_SIZE (htab);
8498
8499 if (tls_type & GOT_TLS_GD)
8500 htab->srelgot->size += RELOC_SIZE (htab);
8501
8502 if ((tls_type & GOT_TLS_GD) && indx != 0)
8503 htab->srelgot->size += RELOC_SIZE (htab);
8504 }
8505 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8506 || h->root.type != bfd_link_hash_undefweak)
8507 && (info->shared
8508 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
8509 htab->srelgot->size += RELOC_SIZE (htab);
8510 }
8511 }
8512 else
8513 h->got.offset = (bfd_vma) -1;
8514
8515 /* Allocate stubs for exported Thumb functions on v4t. */
8516 if (!htab->use_blx && h->dynindx != -1
8517 && h->def_regular
8518 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
8519 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
8520 {
8521 struct elf_link_hash_entry * th;
8522 struct bfd_link_hash_entry * bh;
8523 struct elf_link_hash_entry * myh;
8524 char name[1024];
8525 asection *s;
8526 bh = NULL;
8527 /* Create a new symbol to regist the real location of the function. */
8528 s = h->root.u.def.section;
8529 sprintf(name, "__real_%s", h->root.root.string);
8530 _bfd_generic_link_add_one_symbol (info, s->owner,
8531 name, BSF_GLOBAL, s,
8532 h->root.u.def.value,
8533 NULL, TRUE, FALSE, &bh);
8534
8535 myh = (struct elf_link_hash_entry *) bh;
8536 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
8537 myh->forced_local = 1;
8538 eh->export_glue = myh;
8539 th = record_arm_to_thumb_glue (info, h);
8540 /* Point the symbol at the stub. */
8541 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8542 h->root.u.def.section = th->root.u.def.section;
8543 h->root.u.def.value = th->root.u.def.value & ~1;
8544 }
8545
8546 if (eh->relocs_copied == NULL)
8547 return TRUE;
8548
8549 /* In the shared -Bsymbolic case, discard space allocated for
8550 dynamic pc-relative relocs against symbols which turn out to be
8551 defined in regular objects. For the normal shared case, discard
8552 space for pc-relative relocs that have become local due to symbol
8553 visibility changes. */
8554
8555 if (info->shared || htab->root.is_relocatable_executable)
8556 {
8557 /* The only relocs that use pc_count are R_ARM_REL32 and
8558 R_ARM_REL32_NOI, which will appear on something like
8559 ".long foo - .". We want calls to protected symbols to resolve
8560 directly to the function rather than going via the plt. If people
8561 want function pointer comparisons to work as expected then they
8562 should avoid writing assembly like ".long foo - .". */
8563 if (SYMBOL_CALLS_LOCAL (info, h))
8564 {
8565 struct elf32_arm_relocs_copied **pp;
8566
8567 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
8568 {
8569 p->count -= p->pc_count;
8570 p->pc_count = 0;
8571 if (p->count == 0)
8572 *pp = p->next;
8573 else
8574 pp = &p->next;
8575 }
8576 }
8577
8578 /* Also discard relocs on undefined weak syms with non-default
8579 visibility. */
8580 if (eh->relocs_copied != NULL
8581 && h->root.type == bfd_link_hash_undefweak)
8582 {
8583 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8584 eh->relocs_copied = NULL;
8585
8586 /* Make sure undefined weak symbols are output as a dynamic
8587 symbol in PIEs. */
8588 else if (h->dynindx == -1
8589 && !h->forced_local)
8590 {
8591 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8592 return FALSE;
8593 }
8594 }
8595
8596 else if (htab->root.is_relocatable_executable && h->dynindx == -1
8597 && h->root.type == bfd_link_hash_new)
8598 {
8599 /* Output absolute symbols so that we can create relocations
8600 against them. For normal symbols we output a relocation
8601 against the section that contains them. */
8602 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8603 return FALSE;
8604 }
8605
8606 }
8607 else
8608 {
8609 /* For the non-shared case, discard space for relocs against
8610 symbols which turn out to need copy relocs or are not
8611 dynamic. */
8612
8613 if (!h->non_got_ref
8614 && ((h->def_dynamic
8615 && !h->def_regular)
8616 || (htab->root.dynamic_sections_created
8617 && (h->root.type == bfd_link_hash_undefweak
8618 || h->root.type == bfd_link_hash_undefined))))
8619 {
8620 /* Make sure this symbol is output as a dynamic symbol.
8621 Undefined weak syms won't yet be marked as dynamic. */
8622 if (h->dynindx == -1
8623 && !h->forced_local)
8624 {
8625 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8626 return FALSE;
8627 }
8628
8629 /* If that succeeded, we know we'll be keeping all the
8630 relocs. */
8631 if (h->dynindx != -1)
8632 goto keep;
8633 }
8634
8635 eh->relocs_copied = NULL;
8636
8637 keep: ;
8638 }
8639
8640 /* Finally, allocate space. */
8641 for (p = eh->relocs_copied; p != NULL; p = p->next)
8642 {
8643 asection *sreloc = elf_section_data (p->section)->sreloc;
8644 sreloc->size += p->count * RELOC_SIZE (htab);
8645 }
8646
8647 return TRUE;
8648 }
8649
8650 /* Find any dynamic relocs that apply to read-only sections. */
8651
8652 static bfd_boolean
8653 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
8654 {
8655 struct elf32_arm_link_hash_entry *eh;
8656 struct elf32_arm_relocs_copied *p;
8657
8658 if (h->root.type == bfd_link_hash_warning)
8659 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8660
8661 eh = (struct elf32_arm_link_hash_entry *) h;
8662 for (p = eh->relocs_copied; p != NULL; p = p->next)
8663 {
8664 asection *s = p->section;
8665
8666 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8667 {
8668 struct bfd_link_info *info = (struct bfd_link_info *) inf;
8669
8670 info->flags |= DF_TEXTREL;
8671
8672 /* Not an error, just cut short the traversal. */
8673 return FALSE;
8674 }
8675 }
8676 return TRUE;
8677 }
8678
8679 void
8680 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
8681 int byteswap_code)
8682 {
8683 struct elf32_arm_link_hash_table *globals;
8684
8685 globals = elf32_arm_hash_table (info);
8686 globals->byteswap_code = byteswap_code;
8687 }
8688
8689 /* Set the sizes of the dynamic sections. */
8690
8691 static bfd_boolean
8692 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
8693 struct bfd_link_info * info)
8694 {
8695 bfd * dynobj;
8696 asection * s;
8697 bfd_boolean plt;
8698 bfd_boolean relocs;
8699 bfd *ibfd;
8700 struct elf32_arm_link_hash_table *htab;
8701
8702 htab = elf32_arm_hash_table (info);
8703 dynobj = elf_hash_table (info)->dynobj;
8704 BFD_ASSERT (dynobj != NULL);
8705 check_use_blx (htab);
8706
8707 if (elf_hash_table (info)->dynamic_sections_created)
8708 {
8709 /* Set the contents of the .interp section to the interpreter. */
8710 if (info->executable)
8711 {
8712 s = bfd_get_section_by_name (dynobj, ".interp");
8713 BFD_ASSERT (s != NULL);
8714 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8715 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8716 }
8717 }
8718
8719 /* Set up .got offsets for local syms, and space for local dynamic
8720 relocs. */
8721 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8722 {
8723 bfd_signed_vma *local_got;
8724 bfd_signed_vma *end_local_got;
8725 char *local_tls_type;
8726 bfd_size_type locsymcount;
8727 Elf_Internal_Shdr *symtab_hdr;
8728 asection *srel;
8729
8730 if (! is_arm_elf (ibfd))
8731 continue;
8732
8733 for (s = ibfd->sections; s != NULL; s = s->next)
8734 {
8735 struct elf32_arm_relocs_copied *p;
8736
8737 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8738 {
8739 if (!bfd_is_abs_section (p->section)
8740 && bfd_is_abs_section (p->section->output_section))
8741 {
8742 /* Input section has been discarded, either because
8743 it is a copy of a linkonce section or due to
8744 linker script /DISCARD/, so we'll be discarding
8745 the relocs too. */
8746 }
8747 else if (p->count != 0)
8748 {
8749 srel = elf_section_data (p->section)->sreloc;
8750 srel->size += p->count * RELOC_SIZE (htab);
8751 if ((p->section->output_section->flags & SEC_READONLY) != 0)
8752 info->flags |= DF_TEXTREL;
8753 }
8754 }
8755 }
8756
8757 local_got = elf_local_got_refcounts (ibfd);
8758 if (!local_got)
8759 continue;
8760
8761 symtab_hdr = & elf_symtab_hdr (ibfd);
8762 locsymcount = symtab_hdr->sh_info;
8763 end_local_got = local_got + locsymcount;
8764 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
8765 s = htab->sgot;
8766 srel = htab->srelgot;
8767 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
8768 {
8769 if (*local_got > 0)
8770 {
8771 *local_got = s->size;
8772 if (*local_tls_type & GOT_TLS_GD)
8773 /* TLS_GD relocs need an 8-byte structure in the GOT. */
8774 s->size += 8;
8775 if (*local_tls_type & GOT_TLS_IE)
8776 s->size += 4;
8777 if (*local_tls_type == GOT_NORMAL)
8778 s->size += 4;
8779
8780 if (info->shared || *local_tls_type == GOT_TLS_GD)
8781 srel->size += RELOC_SIZE (htab);
8782 }
8783 else
8784 *local_got = (bfd_vma) -1;
8785 }
8786 }
8787
8788 if (htab->tls_ldm_got.refcount > 0)
8789 {
8790 /* Allocate two GOT entries and one dynamic relocation (if necessary)
8791 for R_ARM_TLS_LDM32 relocations. */
8792 htab->tls_ldm_got.offset = htab->sgot->size;
8793 htab->sgot->size += 8;
8794 if (info->shared)
8795 htab->srelgot->size += RELOC_SIZE (htab);
8796 }
8797 else
8798 htab->tls_ldm_got.offset = -1;
8799
8800 /* Allocate global sym .plt and .got entries, and space for global
8801 sym dynamic relocs. */
8802 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
8803
8804 /* Here we rummage through the found bfds to collect glue information. */
8805 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8806 {
8807 if (! is_arm_elf (ibfd))
8808 continue;
8809
8810 /* Initialise mapping tables for code/data. */
8811 bfd_elf32_arm_init_maps (ibfd);
8812
8813 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
8814 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
8815 /* xgettext:c-format */
8816 _bfd_error_handler (_("Errors encountered processing file %s"),
8817 ibfd->filename);
8818 }
8819
8820 /* The check_relocs and adjust_dynamic_symbol entry points have
8821 determined the sizes of the various dynamic sections. Allocate
8822 memory for them. */
8823 plt = FALSE;
8824 relocs = FALSE;
8825 for (s = dynobj->sections; s != NULL; s = s->next)
8826 {
8827 const char * name;
8828
8829 if ((s->flags & SEC_LINKER_CREATED) == 0)
8830 continue;
8831
8832 /* It's OK to base decisions on the section name, because none
8833 of the dynobj section names depend upon the input files. */
8834 name = bfd_get_section_name (dynobj, s);
8835
8836 if (strcmp (name, ".plt") == 0)
8837 {
8838 /* Remember whether there is a PLT. */
8839 plt = s->size != 0;
8840 }
8841 else if (CONST_STRNEQ (name, ".rel"))
8842 {
8843 if (s->size != 0)
8844 {
8845 /* Remember whether there are any reloc sections other
8846 than .rel(a).plt and .rela.plt.unloaded. */
8847 if (s != htab->srelplt && s != htab->srelplt2)
8848 relocs = TRUE;
8849
8850 /* We use the reloc_count field as a counter if we need
8851 to copy relocs into the output file. */
8852 s->reloc_count = 0;
8853 }
8854 }
8855 else if (! CONST_STRNEQ (name, ".got")
8856 && strcmp (name, ".dynbss") != 0)
8857 {
8858 /* It's not one of our sections, so don't allocate space. */
8859 continue;
8860 }
8861
8862 if (s->size == 0)
8863 {
8864 /* If we don't need this section, strip it from the
8865 output file. This is mostly to handle .rel(a).bss and
8866 .rel(a).plt. We must create both sections in
8867 create_dynamic_sections, because they must be created
8868 before the linker maps input sections to output
8869 sections. The linker does that before
8870 adjust_dynamic_symbol is called, and it is that
8871 function which decides whether anything needs to go
8872 into these sections. */
8873 s->flags |= SEC_EXCLUDE;
8874 continue;
8875 }
8876
8877 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8878 continue;
8879
8880 /* Allocate memory for the section contents. */
8881 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
8882 if (s->contents == NULL)
8883 return FALSE;
8884 }
8885
8886 if (elf_hash_table (info)->dynamic_sections_created)
8887 {
8888 /* Add some entries to the .dynamic section. We fill in the
8889 values later, in elf32_arm_finish_dynamic_sections, but we
8890 must add the entries now so that we get the correct size for
8891 the .dynamic section. The DT_DEBUG entry is filled in by the
8892 dynamic linker and used by the debugger. */
8893 #define add_dynamic_entry(TAG, VAL) \
8894 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8895
8896 if (info->executable)
8897 {
8898 if (!add_dynamic_entry (DT_DEBUG, 0))
8899 return FALSE;
8900 }
8901
8902 if (plt)
8903 {
8904 if ( !add_dynamic_entry (DT_PLTGOT, 0)
8905 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8906 || !add_dynamic_entry (DT_PLTREL,
8907 htab->use_rel ? DT_REL : DT_RELA)
8908 || !add_dynamic_entry (DT_JMPREL, 0))
8909 return FALSE;
8910 }
8911
8912 if (relocs)
8913 {
8914 if (htab->use_rel)
8915 {
8916 if (!add_dynamic_entry (DT_REL, 0)
8917 || !add_dynamic_entry (DT_RELSZ, 0)
8918 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
8919 return FALSE;
8920 }
8921 else
8922 {
8923 if (!add_dynamic_entry (DT_RELA, 0)
8924 || !add_dynamic_entry (DT_RELASZ, 0)
8925 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
8926 return FALSE;
8927 }
8928 }
8929
8930 /* If any dynamic relocs apply to a read-only section,
8931 then we need a DT_TEXTREL entry. */
8932 if ((info->flags & DF_TEXTREL) == 0)
8933 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
8934 (PTR) info);
8935
8936 if ((info->flags & DF_TEXTREL) != 0)
8937 {
8938 if (!add_dynamic_entry (DT_TEXTREL, 0))
8939 return FALSE;
8940 }
8941 if (htab->vxworks_p
8942 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
8943 return FALSE;
8944 }
8945 #undef add_dynamic_entry
8946
8947 return TRUE;
8948 }
8949
8950 /* Finish up dynamic symbol handling. We set the contents of various
8951 dynamic sections here. */
8952
8953 static bfd_boolean
8954 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
8955 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
8956 {
8957 bfd * dynobj;
8958 struct elf32_arm_link_hash_table *htab;
8959 struct elf32_arm_link_hash_entry *eh;
8960
8961 dynobj = elf_hash_table (info)->dynobj;
8962 htab = elf32_arm_hash_table (info);
8963 eh = (struct elf32_arm_link_hash_entry *) h;
8964
8965 if (h->plt.offset != (bfd_vma) -1)
8966 {
8967 asection * splt;
8968 asection * srel;
8969 bfd_byte *loc;
8970 bfd_vma plt_index;
8971 Elf_Internal_Rela rel;
8972
8973 /* This symbol has an entry in the procedure linkage table. Set
8974 it up. */
8975
8976 BFD_ASSERT (h->dynindx != -1);
8977
8978 splt = bfd_get_section_by_name (dynobj, ".plt");
8979 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
8980 BFD_ASSERT (splt != NULL && srel != NULL);
8981
8982 /* Fill in the entry in the procedure linkage table. */
8983 if (htab->symbian_p)
8984 {
8985 put_arm_insn (htab, output_bfd,
8986 elf32_arm_symbian_plt_entry[0],
8987 splt->contents + h->plt.offset);
8988 bfd_put_32 (output_bfd,
8989 elf32_arm_symbian_plt_entry[1],
8990 splt->contents + h->plt.offset + 4);
8991
8992 /* Fill in the entry in the .rel.plt section. */
8993 rel.r_offset = (splt->output_section->vma
8994 + splt->output_offset
8995 + h->plt.offset + 4);
8996 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8997
8998 /* Get the index in the procedure linkage table which
8999 corresponds to this symbol. This is the index of this symbol
9000 in all the symbols for which we are making plt entries. The
9001 first entry in the procedure linkage table is reserved. */
9002 plt_index = ((h->plt.offset - htab->plt_header_size)
9003 / htab->plt_entry_size);
9004 }
9005 else
9006 {
9007 bfd_vma got_offset, got_address, plt_address;
9008 bfd_vma got_displacement;
9009 asection * sgot;
9010 bfd_byte * ptr;
9011
9012 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
9013 BFD_ASSERT (sgot != NULL);
9014
9015 /* Get the offset into the .got.plt table of the entry that
9016 corresponds to this function. */
9017 got_offset = eh->plt_got_offset;
9018
9019 /* Get the index in the procedure linkage table which
9020 corresponds to this symbol. This is the index of this symbol
9021 in all the symbols for which we are making plt entries. The
9022 first three entries in .got.plt are reserved; after that
9023 symbols appear in the same order as in .plt. */
9024 plt_index = (got_offset - 12) / 4;
9025
9026 /* Calculate the address of the GOT entry. */
9027 got_address = (sgot->output_section->vma
9028 + sgot->output_offset
9029 + got_offset);
9030
9031 /* ...and the address of the PLT entry. */
9032 plt_address = (splt->output_section->vma
9033 + splt->output_offset
9034 + h->plt.offset);
9035
9036 ptr = htab->splt->contents + h->plt.offset;
9037 if (htab->vxworks_p && info->shared)
9038 {
9039 unsigned int i;
9040 bfd_vma val;
9041
9042 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
9043 {
9044 val = elf32_arm_vxworks_shared_plt_entry[i];
9045 if (i == 2)
9046 val |= got_address - sgot->output_section->vma;
9047 if (i == 5)
9048 val |= plt_index * RELOC_SIZE (htab);
9049 if (i == 2 || i == 5)
9050 bfd_put_32 (output_bfd, val, ptr);
9051 else
9052 put_arm_insn (htab, output_bfd, val, ptr);
9053 }
9054 }
9055 else if (htab->vxworks_p)
9056 {
9057 unsigned int i;
9058 bfd_vma val;
9059
9060 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
9061 {
9062 val = elf32_arm_vxworks_exec_plt_entry[i];
9063 if (i == 2)
9064 val |= got_address;
9065 if (i == 4)
9066 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
9067 if (i == 5)
9068 val |= plt_index * RELOC_SIZE (htab);
9069 if (i == 2 || i == 5)
9070 bfd_put_32 (output_bfd, val, ptr);
9071 else
9072 put_arm_insn (htab, output_bfd, val, ptr);
9073 }
9074
9075 loc = (htab->srelplt2->contents
9076 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
9077
9078 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
9079 referencing the GOT for this PLT entry. */
9080 rel.r_offset = plt_address + 8;
9081 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9082 rel.r_addend = got_offset;
9083 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9084 loc += RELOC_SIZE (htab);
9085
9086 /* Create the R_ARM_ABS32 relocation referencing the
9087 beginning of the PLT for this GOT entry. */
9088 rel.r_offset = got_address;
9089 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9090 rel.r_addend = 0;
9091 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9092 }
9093 else
9094 {
9095 bfd_signed_vma thumb_refs;
9096 /* Calculate the displacement between the PLT slot and the
9097 entry in the GOT. The eight-byte offset accounts for the
9098 value produced by adding to pc in the first instruction
9099 of the PLT stub. */
9100 got_displacement = got_address - (plt_address + 8);
9101
9102 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
9103
9104 thumb_refs = eh->plt_thumb_refcount;
9105 if (!htab->use_blx)
9106 thumb_refs += eh->plt_maybe_thumb_refcount;
9107
9108 if (thumb_refs > 0)
9109 {
9110 put_thumb_insn (htab, output_bfd,
9111 elf32_arm_plt_thumb_stub[0], ptr - 4);
9112 put_thumb_insn (htab, output_bfd,
9113 elf32_arm_plt_thumb_stub[1], ptr - 2);
9114 }
9115
9116 put_arm_insn (htab, output_bfd,
9117 elf32_arm_plt_entry[0]
9118 | ((got_displacement & 0x0ff00000) >> 20),
9119 ptr + 0);
9120 put_arm_insn (htab, output_bfd,
9121 elf32_arm_plt_entry[1]
9122 | ((got_displacement & 0x000ff000) >> 12),
9123 ptr+ 4);
9124 put_arm_insn (htab, output_bfd,
9125 elf32_arm_plt_entry[2]
9126 | (got_displacement & 0x00000fff),
9127 ptr + 8);
9128 #ifdef FOUR_WORD_PLT
9129 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
9130 #endif
9131 }
9132
9133 /* Fill in the entry in the global offset table. */
9134 bfd_put_32 (output_bfd,
9135 (splt->output_section->vma
9136 + splt->output_offset),
9137 sgot->contents + got_offset);
9138
9139 /* Fill in the entry in the .rel(a).plt section. */
9140 rel.r_addend = 0;
9141 rel.r_offset = got_address;
9142 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
9143 }
9144
9145 loc = srel->contents + plt_index * RELOC_SIZE (htab);
9146 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9147
9148 if (!h->def_regular)
9149 {
9150 /* Mark the symbol as undefined, rather than as defined in
9151 the .plt section. Leave the value alone. */
9152 sym->st_shndx = SHN_UNDEF;
9153 /* If the symbol is weak, we do need to clear the value.
9154 Otherwise, the PLT entry would provide a definition for
9155 the symbol even if the symbol wasn't defined anywhere,
9156 and so the symbol would never be NULL. */
9157 if (!h->ref_regular_nonweak)
9158 sym->st_value = 0;
9159 }
9160 }
9161
9162 if (h->got.offset != (bfd_vma) -1
9163 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
9164 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
9165 {
9166 asection * sgot;
9167 asection * srel;
9168 Elf_Internal_Rela rel;
9169 bfd_byte *loc;
9170 bfd_vma offset;
9171
9172 /* This symbol has an entry in the global offset table. Set it
9173 up. */
9174 sgot = bfd_get_section_by_name (dynobj, ".got");
9175 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
9176 BFD_ASSERT (sgot != NULL && srel != NULL);
9177
9178 offset = (h->got.offset & ~(bfd_vma) 1);
9179 rel.r_addend = 0;
9180 rel.r_offset = (sgot->output_section->vma
9181 + sgot->output_offset
9182 + offset);
9183
9184 /* If this is a static link, or it is a -Bsymbolic link and the
9185 symbol is defined locally or was forced to be local because
9186 of a version file, we just want to emit a RELATIVE reloc.
9187 The entry in the global offset table will already have been
9188 initialized in the relocate_section function. */
9189 if (info->shared
9190 && SYMBOL_REFERENCES_LOCAL (info, h))
9191 {
9192 BFD_ASSERT((h->got.offset & 1) != 0);
9193 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
9194 if (!htab->use_rel)
9195 {
9196 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
9197 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
9198 }
9199 }
9200 else
9201 {
9202 BFD_ASSERT((h->got.offset & 1) == 0);
9203 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
9204 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
9205 }
9206
9207 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
9208 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9209 }
9210
9211 if (h->needs_copy)
9212 {
9213 asection * s;
9214 Elf_Internal_Rela rel;
9215 bfd_byte *loc;
9216
9217 /* This symbol needs a copy reloc. Set it up. */
9218 BFD_ASSERT (h->dynindx != -1
9219 && (h->root.type == bfd_link_hash_defined
9220 || h->root.type == bfd_link_hash_defweak));
9221
9222 s = bfd_get_section_by_name (h->root.u.def.section->owner,
9223 RELOC_SECTION (htab, ".bss"));
9224 BFD_ASSERT (s != NULL);
9225
9226 rel.r_addend = 0;
9227 rel.r_offset = (h->root.u.def.value
9228 + h->root.u.def.section->output_section->vma
9229 + h->root.u.def.section->output_offset);
9230 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
9231 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
9232 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9233 }
9234
9235 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
9236 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
9237 to the ".got" section. */
9238 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
9239 || (!htab->vxworks_p && h == htab->root.hgot))
9240 sym->st_shndx = SHN_ABS;
9241
9242 return TRUE;
9243 }
9244
9245 /* Finish up the dynamic sections. */
9246
9247 static bfd_boolean
9248 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
9249 {
9250 bfd * dynobj;
9251 asection * sgot;
9252 asection * sdyn;
9253
9254 dynobj = elf_hash_table (info)->dynobj;
9255
9256 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
9257 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
9258 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
9259
9260 if (elf_hash_table (info)->dynamic_sections_created)
9261 {
9262 asection *splt;
9263 Elf32_External_Dyn *dyncon, *dynconend;
9264 struct elf32_arm_link_hash_table *htab;
9265
9266 htab = elf32_arm_hash_table (info);
9267 splt = bfd_get_section_by_name (dynobj, ".plt");
9268 BFD_ASSERT (splt != NULL && sdyn != NULL);
9269
9270 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9271 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9272
9273 for (; dyncon < dynconend; dyncon++)
9274 {
9275 Elf_Internal_Dyn dyn;
9276 const char * name;
9277 asection * s;
9278
9279 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9280
9281 switch (dyn.d_tag)
9282 {
9283 unsigned int type;
9284
9285 default:
9286 if (htab->vxworks_p
9287 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9288 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9289 break;
9290
9291 case DT_HASH:
9292 name = ".hash";
9293 goto get_vma_if_bpabi;
9294 case DT_STRTAB:
9295 name = ".dynstr";
9296 goto get_vma_if_bpabi;
9297 case DT_SYMTAB:
9298 name = ".dynsym";
9299 goto get_vma_if_bpabi;
9300 case DT_VERSYM:
9301 name = ".gnu.version";
9302 goto get_vma_if_bpabi;
9303 case DT_VERDEF:
9304 name = ".gnu.version_d";
9305 goto get_vma_if_bpabi;
9306 case DT_VERNEED:
9307 name = ".gnu.version_r";
9308 goto get_vma_if_bpabi;
9309
9310 case DT_PLTGOT:
9311 name = ".got";
9312 goto get_vma;
9313 case DT_JMPREL:
9314 name = RELOC_SECTION (htab, ".plt");
9315 get_vma:
9316 s = bfd_get_section_by_name (output_bfd, name);
9317 BFD_ASSERT (s != NULL);
9318 if (!htab->symbian_p)
9319 dyn.d_un.d_ptr = s->vma;
9320 else
9321 /* In the BPABI, tags in the PT_DYNAMIC section point
9322 at the file offset, not the memory address, for the
9323 convenience of the post linker. */
9324 dyn.d_un.d_ptr = s->filepos;
9325 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9326 break;
9327
9328 get_vma_if_bpabi:
9329 if (htab->symbian_p)
9330 goto get_vma;
9331 break;
9332
9333 case DT_PLTRELSZ:
9334 s = bfd_get_section_by_name (output_bfd,
9335 RELOC_SECTION (htab, ".plt"));
9336 BFD_ASSERT (s != NULL);
9337 dyn.d_un.d_val = s->size;
9338 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9339 break;
9340
9341 case DT_RELSZ:
9342 case DT_RELASZ:
9343 if (!htab->symbian_p)
9344 {
9345 /* My reading of the SVR4 ABI indicates that the
9346 procedure linkage table relocs (DT_JMPREL) should be
9347 included in the overall relocs (DT_REL). This is
9348 what Solaris does. However, UnixWare can not handle
9349 that case. Therefore, we override the DT_RELSZ entry
9350 here to make it not include the JMPREL relocs. Since
9351 the linker script arranges for .rel(a).plt to follow all
9352 other relocation sections, we don't have to worry
9353 about changing the DT_REL entry. */
9354 s = bfd_get_section_by_name (output_bfd,
9355 RELOC_SECTION (htab, ".plt"));
9356 if (s != NULL)
9357 dyn.d_un.d_val -= s->size;
9358 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9359 break;
9360 }
9361 /* Fall through */
9362
9363 case DT_REL:
9364 case DT_RELA:
9365 /* In the BPABI, the DT_REL tag must point at the file
9366 offset, not the VMA, of the first relocation
9367 section. So, we use code similar to that in
9368 elflink.c, but do not check for SHF_ALLOC on the
9369 relcoation section, since relocations sections are
9370 never allocated under the BPABI. The comments above
9371 about Unixware notwithstanding, we include all of the
9372 relocations here. */
9373 if (htab->symbian_p)
9374 {
9375 unsigned int i;
9376 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
9377 ? SHT_REL : SHT_RELA);
9378 dyn.d_un.d_val = 0;
9379 for (i = 1; i < elf_numsections (output_bfd); i++)
9380 {
9381 Elf_Internal_Shdr *hdr
9382 = elf_elfsections (output_bfd)[i];
9383 if (hdr->sh_type == type)
9384 {
9385 if (dyn.d_tag == DT_RELSZ
9386 || dyn.d_tag == DT_RELASZ)
9387 dyn.d_un.d_val += hdr->sh_size;
9388 else if ((ufile_ptr) hdr->sh_offset
9389 <= dyn.d_un.d_val - 1)
9390 dyn.d_un.d_val = hdr->sh_offset;
9391 }
9392 }
9393 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9394 }
9395 break;
9396
9397 /* Set the bottom bit of DT_INIT/FINI if the
9398 corresponding function is Thumb. */
9399 case DT_INIT:
9400 name = info->init_function;
9401 goto get_sym;
9402 case DT_FINI:
9403 name = info->fini_function;
9404 get_sym:
9405 /* If it wasn't set by elf_bfd_final_link
9406 then there is nothing to adjust. */
9407 if (dyn.d_un.d_val != 0)
9408 {
9409 struct elf_link_hash_entry * eh;
9410
9411 eh = elf_link_hash_lookup (elf_hash_table (info), name,
9412 FALSE, FALSE, TRUE);
9413 if (eh != (struct elf_link_hash_entry *) NULL
9414 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
9415 {
9416 dyn.d_un.d_val |= 1;
9417 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9418 }
9419 }
9420 break;
9421 }
9422 }
9423
9424 /* Fill in the first entry in the procedure linkage table. */
9425 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
9426 {
9427 const bfd_vma *plt0_entry;
9428 bfd_vma got_address, plt_address, got_displacement;
9429
9430 /* Calculate the addresses of the GOT and PLT. */
9431 got_address = sgot->output_section->vma + sgot->output_offset;
9432 plt_address = splt->output_section->vma + splt->output_offset;
9433
9434 if (htab->vxworks_p)
9435 {
9436 /* The VxWorks GOT is relocated by the dynamic linker.
9437 Therefore, we must emit relocations rather than simply
9438 computing the values now. */
9439 Elf_Internal_Rela rel;
9440
9441 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
9442 put_arm_insn (htab, output_bfd, plt0_entry[0],
9443 splt->contents + 0);
9444 put_arm_insn (htab, output_bfd, plt0_entry[1],
9445 splt->contents + 4);
9446 put_arm_insn (htab, output_bfd, plt0_entry[2],
9447 splt->contents + 8);
9448 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
9449
9450 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
9451 rel.r_offset = plt_address + 12;
9452 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9453 rel.r_addend = 0;
9454 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
9455 htab->srelplt2->contents);
9456 }
9457 else
9458 {
9459 got_displacement = got_address - (plt_address + 16);
9460
9461 plt0_entry = elf32_arm_plt0_entry;
9462 put_arm_insn (htab, output_bfd, plt0_entry[0],
9463 splt->contents + 0);
9464 put_arm_insn (htab, output_bfd, plt0_entry[1],
9465 splt->contents + 4);
9466 put_arm_insn (htab, output_bfd, plt0_entry[2],
9467 splt->contents + 8);
9468 put_arm_insn (htab, output_bfd, plt0_entry[3],
9469 splt->contents + 12);
9470
9471 #ifdef FOUR_WORD_PLT
9472 /* The displacement value goes in the otherwise-unused
9473 last word of the second entry. */
9474 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
9475 #else
9476 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
9477 #endif
9478 }
9479 }
9480
9481 /* UnixWare sets the entsize of .plt to 4, although that doesn't
9482 really seem like the right value. */
9483 if (splt->output_section->owner == output_bfd)
9484 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
9485
9486 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
9487 {
9488 /* Correct the .rel(a).plt.unloaded relocations. They will have
9489 incorrect symbol indexes. */
9490 int num_plts;
9491 unsigned char *p;
9492
9493 num_plts = ((htab->splt->size - htab->plt_header_size)
9494 / htab->plt_entry_size);
9495 p = htab->srelplt2->contents + RELOC_SIZE (htab);
9496
9497 for (; num_plts; num_plts--)
9498 {
9499 Elf_Internal_Rela rel;
9500
9501 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9502 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9503 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9504 p += RELOC_SIZE (htab);
9505
9506 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9507 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9508 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9509 p += RELOC_SIZE (htab);
9510 }
9511 }
9512 }
9513
9514 /* Fill in the first three entries in the global offset table. */
9515 if (sgot)
9516 {
9517 if (sgot->size > 0)
9518 {
9519 if (sdyn == NULL)
9520 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
9521 else
9522 bfd_put_32 (output_bfd,
9523 sdyn->output_section->vma + sdyn->output_offset,
9524 sgot->contents);
9525 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
9526 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
9527 }
9528
9529 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
9530 }
9531
9532 return TRUE;
9533 }
9534
9535 static void
9536 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9537 {
9538 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9539 struct elf32_arm_link_hash_table *globals;
9540
9541 i_ehdrp = elf_elfheader (abfd);
9542
9543 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
9544 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
9545 else
9546 i_ehdrp->e_ident[EI_OSABI] = 0;
9547 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
9548
9549 if (link_info)
9550 {
9551 globals = elf32_arm_hash_table (link_info);
9552 if (globals->byteswap_code)
9553 i_ehdrp->e_flags |= EF_ARM_BE8;
9554 }
9555 }
9556
9557 static enum elf_reloc_type_class
9558 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
9559 {
9560 switch ((int) ELF32_R_TYPE (rela->r_info))
9561 {
9562 case R_ARM_RELATIVE:
9563 return reloc_class_relative;
9564 case R_ARM_JUMP_SLOT:
9565 return reloc_class_plt;
9566 case R_ARM_COPY:
9567 return reloc_class_copy;
9568 default:
9569 return reloc_class_normal;
9570 }
9571 }
9572
9573 /* Set the right machine number for an Arm ELF file. */
9574
9575 static bfd_boolean
9576 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
9577 {
9578 if (hdr->sh_type == SHT_NOTE)
9579 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
9580
9581 return TRUE;
9582 }
9583
9584 static void
9585 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
9586 {
9587 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
9588 }
9589
9590 /* Return TRUE if this is an unwinding table entry. */
9591
9592 static bfd_boolean
9593 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
9594 {
9595 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
9596 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
9597 }
9598
9599
9600 /* Set the type and flags for an ARM section. We do this by
9601 the section name, which is a hack, but ought to work. */
9602
9603 static bfd_boolean
9604 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
9605 {
9606 const char * name;
9607
9608 name = bfd_get_section_name (abfd, sec);
9609
9610 if (is_arm_elf_unwind_section_name (abfd, name))
9611 {
9612 hdr->sh_type = SHT_ARM_EXIDX;
9613 hdr->sh_flags |= SHF_LINK_ORDER;
9614 }
9615 return TRUE;
9616 }
9617
9618 /* Handle an ARM specific section when reading an object file. This is
9619 called when bfd_section_from_shdr finds a section with an unknown
9620 type. */
9621
9622 static bfd_boolean
9623 elf32_arm_section_from_shdr (bfd *abfd,
9624 Elf_Internal_Shdr * hdr,
9625 const char *name,
9626 int shindex)
9627 {
9628 /* There ought to be a place to keep ELF backend specific flags, but
9629 at the moment there isn't one. We just keep track of the
9630 sections by their name, instead. Fortunately, the ABI gives
9631 names for all the ARM specific sections, so we will probably get
9632 away with this. */
9633 switch (hdr->sh_type)
9634 {
9635 case SHT_ARM_EXIDX:
9636 case SHT_ARM_PREEMPTMAP:
9637 case SHT_ARM_ATTRIBUTES:
9638 break;
9639
9640 default:
9641 return FALSE;
9642 }
9643
9644 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
9645 return FALSE;
9646
9647 return TRUE;
9648 }
9649
9650 /* A structure used to record a list of sections, independently
9651 of the next and prev fields in the asection structure. */
9652 typedef struct section_list
9653 {
9654 asection * sec;
9655 struct section_list * next;
9656 struct section_list * prev;
9657 }
9658 section_list;
9659
9660 /* Unfortunately we need to keep a list of sections for which
9661 an _arm_elf_section_data structure has been allocated. This
9662 is because it is possible for functions like elf32_arm_write_section
9663 to be called on a section which has had an elf_data_structure
9664 allocated for it (and so the used_by_bfd field is valid) but
9665 for which the ARM extended version of this structure - the
9666 _arm_elf_section_data structure - has not been allocated. */
9667 static section_list * sections_with_arm_elf_section_data = NULL;
9668
9669 static void
9670 record_section_with_arm_elf_section_data (asection * sec)
9671 {
9672 struct section_list * entry;
9673
9674 entry = bfd_malloc (sizeof (* entry));
9675 if (entry == NULL)
9676 return;
9677 entry->sec = sec;
9678 entry->next = sections_with_arm_elf_section_data;
9679 entry->prev = NULL;
9680 if (entry->next != NULL)
9681 entry->next->prev = entry;
9682 sections_with_arm_elf_section_data = entry;
9683 }
9684
9685 static struct section_list *
9686 find_arm_elf_section_entry (asection * sec)
9687 {
9688 struct section_list * entry;
9689 static struct section_list * last_entry = NULL;
9690
9691 /* This is a short cut for the typical case where the sections are added
9692 to the sections_with_arm_elf_section_data list in forward order and
9693 then looked up here in backwards order. This makes a real difference
9694 to the ld-srec/sec64k.exp linker test. */
9695 entry = sections_with_arm_elf_section_data;
9696 if (last_entry != NULL)
9697 {
9698 if (last_entry->sec == sec)
9699 entry = last_entry;
9700 else if (last_entry->next != NULL
9701 && last_entry->next->sec == sec)
9702 entry = last_entry->next;
9703 }
9704
9705 for (; entry; entry = entry->next)
9706 if (entry->sec == sec)
9707 break;
9708
9709 if (entry)
9710 /* Record the entry prior to this one - it is the entry we are most
9711 likely to want to locate next time. Also this way if we have been
9712 called from unrecord_section_with_arm_elf_section_data() we will not
9713 be caching a pointer that is about to be freed. */
9714 last_entry = entry->prev;
9715
9716 return entry;
9717 }
9718
9719 static _arm_elf_section_data *
9720 get_arm_elf_section_data (asection * sec)
9721 {
9722 struct section_list * entry;
9723
9724 entry = find_arm_elf_section_entry (sec);
9725
9726 if (entry)
9727 return elf32_arm_section_data (entry->sec);
9728 else
9729 return NULL;
9730 }
9731
9732 static void
9733 unrecord_section_with_arm_elf_section_data (asection * sec)
9734 {
9735 struct section_list * entry;
9736
9737 entry = find_arm_elf_section_entry (sec);
9738
9739 if (entry)
9740 {
9741 if (entry->prev != NULL)
9742 entry->prev->next = entry->next;
9743 if (entry->next != NULL)
9744 entry->next->prev = entry->prev;
9745 if (entry == sections_with_arm_elf_section_data)
9746 sections_with_arm_elf_section_data = entry->next;
9747 free (entry);
9748 }
9749 }
9750
9751
9752 typedef struct
9753 {
9754 void *finfo;
9755 struct bfd_link_info *info;
9756 asection *sec;
9757 int sec_shndx;
9758 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
9759 asection *, struct elf_link_hash_entry *);
9760 } output_arch_syminfo;
9761
9762 enum map_symbol_type
9763 {
9764 ARM_MAP_ARM,
9765 ARM_MAP_THUMB,
9766 ARM_MAP_DATA
9767 };
9768
9769
9770 /* Output a single PLT mapping symbol. */
9771
9772 static bfd_boolean
9773 elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi,
9774 enum map_symbol_type type,
9775 bfd_vma offset)
9776 {
9777 static const char *names[3] = {"$a", "$t", "$d"};
9778 struct elf32_arm_link_hash_table *htab;
9779 Elf_Internal_Sym sym;
9780
9781 htab = elf32_arm_hash_table (osi->info);
9782 sym.st_value = osi->sec->output_section->vma
9783 + osi->sec->output_offset
9784 + offset;
9785 sym.st_size = 0;
9786 sym.st_other = 0;
9787 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
9788 sym.st_shndx = osi->sec_shndx;
9789 if (!osi->func (osi->finfo, names[type], &sym, osi->sec, NULL))
9790 return FALSE;
9791 return TRUE;
9792 }
9793
9794
9795 /* Output mapping symbols for PLT entries associated with H. */
9796
9797 static bfd_boolean
9798 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
9799 {
9800 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
9801 struct elf32_arm_link_hash_table *htab;
9802 struct elf32_arm_link_hash_entry *eh;
9803 bfd_vma addr;
9804
9805 htab = elf32_arm_hash_table (osi->info);
9806
9807 if (h->root.type == bfd_link_hash_indirect)
9808 return TRUE;
9809
9810 if (h->root.type == bfd_link_hash_warning)
9811 /* When warning symbols are created, they **replace** the "real"
9812 entry in the hash table, thus we never get to see the real
9813 symbol in a hash traversal. So look at it now. */
9814 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9815
9816 if (h->plt.offset == (bfd_vma) -1)
9817 return TRUE;
9818
9819 eh = (struct elf32_arm_link_hash_entry *) h;
9820 addr = h->plt.offset;
9821 if (htab->symbian_p)
9822 {
9823 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9824 return FALSE;
9825 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4))
9826 return FALSE;
9827 }
9828 else if (htab->vxworks_p)
9829 {
9830 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9831 return FALSE;
9832 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8))
9833 return FALSE;
9834 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12))
9835 return FALSE;
9836 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20))
9837 return FALSE;
9838 }
9839 else
9840 {
9841 bfd_signed_vma thumb_refs;
9842
9843 thumb_refs = eh->plt_thumb_refcount;
9844 if (!htab->use_blx)
9845 thumb_refs += eh->plt_maybe_thumb_refcount;
9846
9847 if (thumb_refs > 0)
9848 {
9849 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4))
9850 return FALSE;
9851 }
9852 #ifdef FOUR_WORD_PLT
9853 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9854 return FALSE;
9855 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12))
9856 return FALSE;
9857 #else
9858 /* A three-word PLT with no Thumb thunk contains only Arm code,
9859 so only need to output a mapping symbol for the first PLT entry and
9860 entries with thumb thunks. */
9861 if (thumb_refs > 0 || addr == 20)
9862 {
9863 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9864 return FALSE;
9865 }
9866 #endif
9867 }
9868
9869 return TRUE;
9870 }
9871
9872
9873 /* Output mapping symbols for linker generated sections. */
9874
9875 static bfd_boolean
9876 elf32_arm_output_arch_local_syms (bfd *output_bfd,
9877 struct bfd_link_info *info,
9878 void *finfo, bfd_boolean (*func) (void *, const char *,
9879 Elf_Internal_Sym *,
9880 asection *,
9881 struct elf_link_hash_entry *))
9882 {
9883 output_arch_syminfo osi;
9884 struct elf32_arm_link_hash_table *htab;
9885 bfd_vma offset;
9886 bfd_size_type size;
9887
9888 htab = elf32_arm_hash_table (info);
9889 check_use_blx(htab);
9890
9891 osi.finfo = finfo;
9892 osi.info = info;
9893 osi.func = func;
9894
9895 /* ARM->Thumb glue. */
9896 if (htab->arm_glue_size > 0)
9897 {
9898 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
9899 ARM2THUMB_GLUE_SECTION_NAME);
9900
9901 osi.sec_shndx = _bfd_elf_section_from_bfd_section
9902 (output_bfd, osi.sec->output_section);
9903 if (info->shared || htab->root.is_relocatable_executable
9904 || htab->pic_veneer)
9905 size = ARM2THUMB_PIC_GLUE_SIZE;
9906 else if (htab->use_blx)
9907 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
9908 else
9909 size = ARM2THUMB_STATIC_GLUE_SIZE;
9910
9911 for (offset = 0; offset < htab->arm_glue_size; offset += size)
9912 {
9913 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, offset);
9914 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
9915 }
9916 }
9917
9918 /* Thumb->ARM glue. */
9919 if (htab->thumb_glue_size > 0)
9920 {
9921 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
9922 THUMB2ARM_GLUE_SECTION_NAME);
9923
9924 osi.sec_shndx = _bfd_elf_section_from_bfd_section
9925 (output_bfd, osi.sec->output_section);
9926 size = THUMB2ARM_GLUE_SIZE;
9927
9928 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
9929 {
9930 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_THUMB, offset);
9931 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, offset + 4);
9932 }
9933 }
9934
9935 /* ARMv4 BX veneers. */
9936 if (htab->bx_glue_size > 0)
9937 {
9938 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
9939 ARM_BX_GLUE_SECTION_NAME);
9940
9941 osi.sec_shndx = _bfd_elf_section_from_bfd_section
9942 (output_bfd, osi.sec->output_section);
9943
9944 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0);
9945 }
9946
9947 /* Finally, output mapping symbols for the PLT. */
9948 if (!htab->splt || htab->splt->size == 0)
9949 return TRUE;
9950
9951 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
9952 htab->splt->output_section);
9953 osi.sec = htab->splt;
9954 /* Output mapping symbols for the plt header. SymbianOS does not have a
9955 plt header. */
9956 if (htab->vxworks_p)
9957 {
9958 /* VxWorks shared libraries have no PLT header. */
9959 if (!info->shared)
9960 {
9961 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9962 return FALSE;
9963 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12))
9964 return FALSE;
9965 }
9966 }
9967 else if (!htab->symbian_p)
9968 {
9969 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9970 return FALSE;
9971 #ifndef FOUR_WORD_PLT
9972 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16))
9973 return FALSE;
9974 #endif
9975 }
9976
9977 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
9978 return TRUE;
9979 }
9980
9981 /* Allocate target specific section data. */
9982
9983 static bfd_boolean
9984 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
9985 {
9986 if (!sec->used_by_bfd)
9987 {
9988 _arm_elf_section_data *sdata;
9989 bfd_size_type amt = sizeof (*sdata);
9990
9991 sdata = bfd_zalloc (abfd, amt);
9992 if (sdata == NULL)
9993 return FALSE;
9994 sec->used_by_bfd = sdata;
9995 }
9996
9997 record_section_with_arm_elf_section_data (sec);
9998
9999 return _bfd_elf_new_section_hook (abfd, sec);
10000 }
10001
10002
10003 /* Used to order a list of mapping symbols by address. */
10004
10005 static int
10006 elf32_arm_compare_mapping (const void * a, const void * b)
10007 {
10008 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
10009 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
10010
10011 if (amap->vma > bmap->vma)
10012 return 1;
10013 else if (amap->vma < bmap->vma)
10014 return -1;
10015 else if (amap->type > bmap->type)
10016 /* Ensure results do not depend on the host qsort for objects with
10017 multiple mapping symbols at the same address by sorting on type
10018 after vma. */
10019 return 1;
10020 else if (amap->type < bmap->type)
10021 return -1;
10022 else
10023 return 0;
10024 }
10025
10026
10027 /* Do code byteswapping. Return FALSE afterwards so that the section is
10028 written out as normal. */
10029
10030 static bfd_boolean
10031 elf32_arm_write_section (bfd *output_bfd,
10032 struct bfd_link_info *link_info, asection *sec,
10033 bfd_byte *contents)
10034 {
10035 int mapcount, errcount;
10036 _arm_elf_section_data *arm_data;
10037 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
10038 elf32_arm_section_map *map;
10039 elf32_vfp11_erratum_list *errnode;
10040 bfd_vma ptr;
10041 bfd_vma end;
10042 bfd_vma offset = sec->output_section->vma + sec->output_offset;
10043 bfd_byte tmp;
10044 int i;
10045
10046 /* If this section has not been allocated an _arm_elf_section_data
10047 structure then we cannot record anything. */
10048 arm_data = get_arm_elf_section_data (sec);
10049 if (arm_data == NULL)
10050 return FALSE;
10051
10052 mapcount = arm_data->mapcount;
10053 map = arm_data->map;
10054 errcount = arm_data->erratumcount;
10055
10056 if (errcount != 0)
10057 {
10058 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
10059
10060 for (errnode = arm_data->erratumlist; errnode != 0;
10061 errnode = errnode->next)
10062 {
10063 bfd_vma index = errnode->vma - offset;
10064
10065 switch (errnode->type)
10066 {
10067 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
10068 {
10069 bfd_vma branch_to_veneer;
10070 /* Original condition code of instruction, plus bit mask for
10071 ARM B instruction. */
10072 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
10073 | 0x0a000000;
10074
10075 /* The instruction is before the label. */
10076 index -= 4;
10077
10078 /* Above offset included in -4 below. */
10079 branch_to_veneer = errnode->u.b.veneer->vma
10080 - errnode->vma - 4;
10081
10082 if ((signed) branch_to_veneer < -(1 << 25)
10083 || (signed) branch_to_veneer >= (1 << 25))
10084 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
10085 "range"), output_bfd);
10086
10087 insn |= (branch_to_veneer >> 2) & 0xffffff;
10088 contents[endianflip ^ index] = insn & 0xff;
10089 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
10090 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
10091 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
10092 }
10093 break;
10094
10095 case VFP11_ERRATUM_ARM_VENEER:
10096 {
10097 bfd_vma branch_from_veneer;
10098 unsigned int insn;
10099
10100 /* Take size of veneer into account. */
10101 branch_from_veneer = errnode->u.v.branch->vma
10102 - errnode->vma - 12;
10103
10104 if ((signed) branch_from_veneer < -(1 << 25)
10105 || (signed) branch_from_veneer >= (1 << 25))
10106 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
10107 "range"), output_bfd);
10108
10109 /* Original instruction. */
10110 insn = errnode->u.v.branch->u.b.vfp_insn;
10111 contents[endianflip ^ index] = insn & 0xff;
10112 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
10113 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
10114 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
10115
10116 /* Branch back to insn after original insn. */
10117 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
10118 contents[endianflip ^ (index + 4)] = insn & 0xff;
10119 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
10120 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
10121 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
10122 }
10123 break;
10124
10125 default:
10126 abort ();
10127 }
10128 }
10129 }
10130
10131 if (mapcount == 0)
10132 return FALSE;
10133
10134 if (globals->byteswap_code)
10135 {
10136 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
10137
10138 ptr = map[0].vma;
10139 for (i = 0; i < mapcount; i++)
10140 {
10141 if (i == mapcount - 1)
10142 end = sec->size;
10143 else
10144 end = map[i + 1].vma;
10145
10146 switch (map[i].type)
10147 {
10148 case 'a':
10149 /* Byte swap code words. */
10150 while (ptr + 3 < end)
10151 {
10152 tmp = contents[ptr];
10153 contents[ptr] = contents[ptr + 3];
10154 contents[ptr + 3] = tmp;
10155 tmp = contents[ptr + 1];
10156 contents[ptr + 1] = contents[ptr + 2];
10157 contents[ptr + 2] = tmp;
10158 ptr += 4;
10159 }
10160 break;
10161
10162 case 't':
10163 /* Byte swap code halfwords. */
10164 while (ptr + 1 < end)
10165 {
10166 tmp = contents[ptr];
10167 contents[ptr] = contents[ptr + 1];
10168 contents[ptr + 1] = tmp;
10169 ptr += 2;
10170 }
10171 break;
10172
10173 case 'd':
10174 /* Leave data alone. */
10175 break;
10176 }
10177 ptr = end;
10178 }
10179 }
10180
10181 free (map);
10182 arm_data->mapcount = 0;
10183 arm_data->mapsize = 0;
10184 arm_data->map = NULL;
10185 unrecord_section_with_arm_elf_section_data (sec);
10186
10187 return FALSE;
10188 }
10189
10190 static void
10191 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
10192 asection * sec,
10193 void * ignore ATTRIBUTE_UNUSED)
10194 {
10195 unrecord_section_with_arm_elf_section_data (sec);
10196 }
10197
10198 static bfd_boolean
10199 elf32_arm_close_and_cleanup (bfd * abfd)
10200 {
10201 if (abfd->sections)
10202 bfd_map_over_sections (abfd,
10203 unrecord_section_via_map_over_sections,
10204 NULL);
10205
10206 return _bfd_elf_close_and_cleanup (abfd);
10207 }
10208
10209 static bfd_boolean
10210 elf32_arm_bfd_free_cached_info (bfd * abfd)
10211 {
10212 if (abfd->sections)
10213 bfd_map_over_sections (abfd,
10214 unrecord_section_via_map_over_sections,
10215 NULL);
10216
10217 return _bfd_free_cached_info (abfd);
10218 }
10219
10220 /* Display STT_ARM_TFUNC symbols as functions. */
10221
10222 static void
10223 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
10224 asymbol *asym)
10225 {
10226 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
10227
10228 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
10229 elfsym->symbol.flags |= BSF_FUNCTION;
10230 }
10231
10232
10233 /* Mangle thumb function symbols as we read them in. */
10234
10235 static bfd_boolean
10236 elf32_arm_swap_symbol_in (bfd * abfd,
10237 const void *psrc,
10238 const void *pshn,
10239 Elf_Internal_Sym *dst)
10240 {
10241 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
10242 return FALSE;
10243
10244 /* New EABI objects mark thumb function symbols by setting the low bit of
10245 the address. Turn these into STT_ARM_TFUNC. */
10246 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
10247 && (dst->st_value & 1))
10248 {
10249 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
10250 dst->st_value &= ~(bfd_vma) 1;
10251 }
10252 return TRUE;
10253 }
10254
10255
10256 /* Mangle thumb function symbols as we write them out. */
10257
10258 static void
10259 elf32_arm_swap_symbol_out (bfd *abfd,
10260 const Elf_Internal_Sym *src,
10261 void *cdst,
10262 void *shndx)
10263 {
10264 Elf_Internal_Sym newsym;
10265
10266 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
10267 of the address set, as per the new EABI. We do this unconditionally
10268 because objcopy does not set the elf header flags until after
10269 it writes out the symbol table. */
10270 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
10271 {
10272 newsym = *src;
10273 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
10274 if (newsym.st_shndx != SHN_UNDEF)
10275 {
10276 /* Do this only for defined symbols. At link type, the static
10277 linker will simulate the work of dynamic linker of resolving
10278 symbols and will carry over the thumbness of found symbols to
10279 the output symbol table. It's not clear how it happens, but
10280 the thumbness of undefined symbols can well be different at
10281 runtime, and writing '1' for them will be confusing for users
10282 and possibly for dynamic linker itself.
10283 */
10284 newsym.st_value |= 1;
10285 }
10286
10287 src = &newsym;
10288 }
10289 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
10290 }
10291
10292 /* Add the PT_ARM_EXIDX program header. */
10293
10294 static bfd_boolean
10295 elf32_arm_modify_segment_map (bfd *abfd,
10296 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10297 {
10298 struct elf_segment_map *m;
10299 asection *sec;
10300
10301 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10302 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10303 {
10304 /* If there is already a PT_ARM_EXIDX header, then we do not
10305 want to add another one. This situation arises when running
10306 "strip"; the input binary already has the header. */
10307 m = elf_tdata (abfd)->segment_map;
10308 while (m && m->p_type != PT_ARM_EXIDX)
10309 m = m->next;
10310 if (!m)
10311 {
10312 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
10313 if (m == NULL)
10314 return FALSE;
10315 m->p_type = PT_ARM_EXIDX;
10316 m->count = 1;
10317 m->sections[0] = sec;
10318
10319 m->next = elf_tdata (abfd)->segment_map;
10320 elf_tdata (abfd)->segment_map = m;
10321 }
10322 }
10323
10324 return TRUE;
10325 }
10326
10327 /* We may add a PT_ARM_EXIDX program header. */
10328
10329 static int
10330 elf32_arm_additional_program_headers (bfd *abfd,
10331 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10332 {
10333 asection *sec;
10334
10335 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10336 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10337 return 1;
10338 else
10339 return 0;
10340 }
10341
10342 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
10343 static bfd_boolean
10344 elf32_arm_is_function_type (unsigned int type)
10345 {
10346 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
10347 }
10348
10349 /* We use this to override swap_symbol_in and swap_symbol_out. */
10350 const struct elf_size_info elf32_arm_size_info = {
10351 sizeof (Elf32_External_Ehdr),
10352 sizeof (Elf32_External_Phdr),
10353 sizeof (Elf32_External_Shdr),
10354 sizeof (Elf32_External_Rel),
10355 sizeof (Elf32_External_Rela),
10356 sizeof (Elf32_External_Sym),
10357 sizeof (Elf32_External_Dyn),
10358 sizeof (Elf_External_Note),
10359 4,
10360 1,
10361 32, 2,
10362 ELFCLASS32, EV_CURRENT,
10363 bfd_elf32_write_out_phdrs,
10364 bfd_elf32_write_shdrs_and_ehdr,
10365 bfd_elf32_checksum_contents,
10366 bfd_elf32_write_relocs,
10367 elf32_arm_swap_symbol_in,
10368 elf32_arm_swap_symbol_out,
10369 bfd_elf32_slurp_reloc_table,
10370 bfd_elf32_slurp_symbol_table,
10371 bfd_elf32_swap_dyn_in,
10372 bfd_elf32_swap_dyn_out,
10373 bfd_elf32_swap_reloc_in,
10374 bfd_elf32_swap_reloc_out,
10375 bfd_elf32_swap_reloca_in,
10376 bfd_elf32_swap_reloca_out
10377 };
10378
10379 #define ELF_ARCH bfd_arch_arm
10380 #define ELF_MACHINE_CODE EM_ARM
10381 #ifdef __QNXTARGET__
10382 #define ELF_MAXPAGESIZE 0x1000
10383 #else
10384 #define ELF_MAXPAGESIZE 0x8000
10385 #endif
10386 #define ELF_MINPAGESIZE 0x1000
10387 #define ELF_COMMONPAGESIZE 0x1000
10388
10389 #define bfd_elf32_mkobject elf32_arm_mkobject
10390
10391 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
10392 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
10393 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
10394 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
10395 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
10396 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
10397 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
10398 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
10399 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
10400 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
10401 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
10402 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
10403 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
10404
10405 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
10406 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
10407 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
10408 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
10409 #define elf_backend_check_relocs elf32_arm_check_relocs
10410 #define elf_backend_relocate_section elf32_arm_relocate_section
10411 #define elf_backend_write_section elf32_arm_write_section
10412 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
10413 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
10414 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
10415 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
10416 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
10417 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
10418 #define elf_backend_post_process_headers elf32_arm_post_process_headers
10419 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
10420 #define elf_backend_object_p elf32_arm_object_p
10421 #define elf_backend_section_flags elf32_arm_section_flags
10422 #define elf_backend_fake_sections elf32_arm_fake_sections
10423 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
10424 #define elf_backend_final_write_processing elf32_arm_final_write_processing
10425 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
10426 #define elf_backend_symbol_processing elf32_arm_symbol_processing
10427 #define elf_backend_size_info elf32_arm_size_info
10428 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
10429 #define elf_backend_additional_program_headers \
10430 elf32_arm_additional_program_headers
10431 #define elf_backend_output_arch_local_syms \
10432 elf32_arm_output_arch_local_syms
10433 #define elf_backend_begin_write_processing \
10434 elf32_arm_begin_write_processing
10435 #define elf_backend_is_function_type elf32_arm_is_function_type
10436
10437 #define elf_backend_can_refcount 1
10438 #define elf_backend_can_gc_sections 1
10439 #define elf_backend_plt_readonly 1
10440 #define elf_backend_want_got_plt 1
10441 #define elf_backend_want_plt_sym 0
10442 #define elf_backend_may_use_rel_p 1
10443 #define elf_backend_may_use_rela_p 0
10444 #define elf_backend_default_use_rela_p 0
10445
10446 #define elf_backend_got_header_size 12
10447
10448 #undef elf_backend_obj_attrs_vendor
10449 #define elf_backend_obj_attrs_vendor "aeabi"
10450 #undef elf_backend_obj_attrs_section
10451 #define elf_backend_obj_attrs_section ".ARM.attributes"
10452 #undef elf_backend_obj_attrs_arg_type
10453 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
10454 #undef elf_backend_obj_attrs_section_type
10455 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
10456
10457 #include "elf32-target.h"
10458
10459 /* VxWorks Targets */
10460
10461 #undef TARGET_LITTLE_SYM
10462 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
10463 #undef TARGET_LITTLE_NAME
10464 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
10465 #undef TARGET_BIG_SYM
10466 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
10467 #undef TARGET_BIG_NAME
10468 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
10469
10470 /* Like elf32_arm_link_hash_table_create -- but overrides
10471 appropriately for VxWorks. */
10472 static struct bfd_link_hash_table *
10473 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
10474 {
10475 struct bfd_link_hash_table *ret;
10476
10477 ret = elf32_arm_link_hash_table_create (abfd);
10478 if (ret)
10479 {
10480 struct elf32_arm_link_hash_table *htab
10481 = (struct elf32_arm_link_hash_table *) ret;
10482 htab->use_rel = 0;
10483 htab->vxworks_p = 1;
10484 }
10485 return ret;
10486 }
10487
10488 static void
10489 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10490 {
10491 elf32_arm_final_write_processing (abfd, linker);
10492 elf_vxworks_final_write_processing (abfd, linker);
10493 }
10494
10495 #undef elf32_bed
10496 #define elf32_bed elf32_arm_vxworks_bed
10497
10498 #undef bfd_elf32_bfd_link_hash_table_create
10499 #define bfd_elf32_bfd_link_hash_table_create \
10500 elf32_arm_vxworks_link_hash_table_create
10501 #undef elf_backend_add_symbol_hook
10502 #define elf_backend_add_symbol_hook \
10503 elf_vxworks_add_symbol_hook
10504 #undef elf_backend_final_write_processing
10505 #define elf_backend_final_write_processing \
10506 elf32_arm_vxworks_final_write_processing
10507 #undef elf_backend_emit_relocs
10508 #define elf_backend_emit_relocs \
10509 elf_vxworks_emit_relocs
10510
10511 #undef elf_backend_may_use_rel_p
10512 #define elf_backend_may_use_rel_p 0
10513 #undef elf_backend_may_use_rela_p
10514 #define elf_backend_may_use_rela_p 1
10515 #undef elf_backend_default_use_rela_p
10516 #define elf_backend_default_use_rela_p 1
10517 #undef elf_backend_want_plt_sym
10518 #define elf_backend_want_plt_sym 1
10519 #undef ELF_MAXPAGESIZE
10520 #define ELF_MAXPAGESIZE 0x1000
10521
10522 #include "elf32-target.h"
10523
10524
10525 /* Symbian OS Targets */
10526
10527 #undef TARGET_LITTLE_SYM
10528 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
10529 #undef TARGET_LITTLE_NAME
10530 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
10531 #undef TARGET_BIG_SYM
10532 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
10533 #undef TARGET_BIG_NAME
10534 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
10535
10536 /* Like elf32_arm_link_hash_table_create -- but overrides
10537 appropriately for Symbian OS. */
10538 static struct bfd_link_hash_table *
10539 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
10540 {
10541 struct bfd_link_hash_table *ret;
10542
10543 ret = elf32_arm_link_hash_table_create (abfd);
10544 if (ret)
10545 {
10546 struct elf32_arm_link_hash_table *htab
10547 = (struct elf32_arm_link_hash_table *)ret;
10548 /* There is no PLT header for Symbian OS. */
10549 htab->plt_header_size = 0;
10550 /* The PLT entries are each three instructions. */
10551 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
10552 htab->symbian_p = 1;
10553 /* Symbian uses armv5t or above, so use_blx is always true. */
10554 htab->use_blx = 1;
10555 htab->root.is_relocatable_executable = 1;
10556 }
10557 return ret;
10558 }
10559
10560 static const struct bfd_elf_special_section
10561 elf32_arm_symbian_special_sections[] =
10562 {
10563 /* In a BPABI executable, the dynamic linking sections do not go in
10564 the loadable read-only segment. The post-linker may wish to
10565 refer to these sections, but they are not part of the final
10566 program image. */
10567 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
10568 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
10569 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
10570 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
10571 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
10572 /* These sections do not need to be writable as the SymbianOS
10573 postlinker will arrange things so that no dynamic relocation is
10574 required. */
10575 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
10576 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
10577 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
10578 { NULL, 0, 0, 0, 0 }
10579 };
10580
10581 static void
10582 elf32_arm_symbian_begin_write_processing (bfd *abfd,
10583 struct bfd_link_info *link_info)
10584 {
10585 /* BPABI objects are never loaded directly by an OS kernel; they are
10586 processed by a postlinker first, into an OS-specific format. If
10587 the D_PAGED bit is set on the file, BFD will align segments on
10588 page boundaries, so that an OS can directly map the file. With
10589 BPABI objects, that just results in wasted space. In addition,
10590 because we clear the D_PAGED bit, map_sections_to_segments will
10591 recognize that the program headers should not be mapped into any
10592 loadable segment. */
10593 abfd->flags &= ~D_PAGED;
10594 elf32_arm_begin_write_processing(abfd, link_info);
10595 }
10596
10597 static bfd_boolean
10598 elf32_arm_symbian_modify_segment_map (bfd *abfd,
10599 struct bfd_link_info *info)
10600 {
10601 struct elf_segment_map *m;
10602 asection *dynsec;
10603
10604 /* BPABI shared libraries and executables should have a PT_DYNAMIC
10605 segment. However, because the .dynamic section is not marked
10606 with SEC_LOAD, the generic ELF code will not create such a
10607 segment. */
10608 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
10609 if (dynsec)
10610 {
10611 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
10612 if (m->p_type == PT_DYNAMIC)
10613 break;
10614
10615 if (m == NULL)
10616 {
10617 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
10618 m->next = elf_tdata (abfd)->segment_map;
10619 elf_tdata (abfd)->segment_map = m;
10620 }
10621 }
10622
10623 /* Also call the generic arm routine. */
10624 return elf32_arm_modify_segment_map (abfd, info);
10625 }
10626
10627 #undef elf32_bed
10628 #define elf32_bed elf32_arm_symbian_bed
10629
10630 /* The dynamic sections are not allocated on SymbianOS; the postlinker
10631 will process them and then discard them. */
10632 #undef ELF_DYNAMIC_SEC_FLAGS
10633 #define ELF_DYNAMIC_SEC_FLAGS \
10634 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
10635
10636 #undef bfd_elf32_bfd_link_hash_table_create
10637 #define bfd_elf32_bfd_link_hash_table_create \
10638 elf32_arm_symbian_link_hash_table_create
10639 #undef elf_backend_add_symbol_hook
10640
10641 #undef elf_backend_special_sections
10642 #define elf_backend_special_sections elf32_arm_symbian_special_sections
10643
10644 #undef elf_backend_begin_write_processing
10645 #define elf_backend_begin_write_processing \
10646 elf32_arm_symbian_begin_write_processing
10647 #undef elf_backend_final_write_processing
10648 #define elf_backend_final_write_processing \
10649 elf32_arm_final_write_processing
10650 #undef elf_backend_emit_relocs
10651
10652 #undef elf_backend_modify_segment_map
10653 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
10654
10655 /* There is no .got section for BPABI objects, and hence no header. */
10656 #undef elf_backend_got_header_size
10657 #define elf_backend_got_header_size 0
10658
10659 /* Similarly, there is no .got.plt section. */
10660 #undef elf_backend_want_got_plt
10661 #define elf_backend_want_got_plt 0
10662
10663 #undef elf_backend_may_use_rel_p
10664 #define elf_backend_may_use_rel_p 1
10665 #undef elf_backend_may_use_rela_p
10666 #define elf_backend_may_use_rela_p 0
10667 #undef elf_backend_default_use_rela_p
10668 #define elf_backend_default_use_rela_p 0
10669 #undef elf_backend_want_plt_sym
10670 #define elf_backend_want_plt_sym 0
10671 #undef ELF_MAXPAGESIZE
10672 #define ELF_MAXPAGESIZE 0x8000
10673
10674 #include "elf32-target.h"
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