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[binutils.git] / bfd / elf32-arm.c
blobcbde697360b069c35c0d8c37d829204e39cd15a5
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 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 0x0000ffff, /* src_mask */
700 0x0000ffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 HOWTO (R_ARM_MOVT_ABS, /* type */
704 0, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_bitfield,/* complain_on_overflow */
710 bfd_elf_generic_reloc, /* special_function */
711 "R_ARM_MOVT_ABS", /* name */
712 FALSE, /* partial_inplace */
713 0x0000ffff, /* src_mask */
714 0x0000ffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
718 0, /* rightshift */
719 2, /* size (0 = byte, 1 = short, 2 = long) */
720 16, /* bitsize */
721 TRUE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_dont,/* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_ARM_MOVW_PREL_NC", /* name */
726 FALSE, /* partial_inplace */
727 0x0000ffff, /* src_mask */
728 0x0000ffff, /* dst_mask */
729 TRUE), /* pcrel_offset */
730
731 HOWTO (R_ARM_MOVT_PREL, /* type */
732 0, /* rightshift */
733 2, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 TRUE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_bitfield,/* complain_on_overflow */
738 bfd_elf_generic_reloc, /* special_function */
739 "R_ARM_MOVT_PREL", /* name */
740 FALSE, /* partial_inplace */
741 0x0000ffff, /* src_mask */
742 0x0000ffff, /* dst_mask */
743 TRUE), /* pcrel_offset */
744
745 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
746 0, /* rightshift */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont,/* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 "R_ARM_THM_MOVW_ABS_NC",/* name */
754 FALSE, /* partial_inplace */
755 0x040f70ff, /* src_mask */
756 0x040f70ff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
760 0, /* rightshift */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_bitfield,/* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_ARM_THM_MOVT_ABS", /* name */
768 FALSE, /* partial_inplace */
769 0x040f70ff, /* src_mask */
770 0x040f70ff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 16, /* bitsize */
777 TRUE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont,/* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_ARM_THM_MOVW_PREL_NC",/* name */
782 FALSE, /* partial_inplace */
783 0x040f70ff, /* src_mask */
784 0x040f70ff, /* dst_mask */
785 TRUE), /* pcrel_offset */
786
787 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 TRUE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_bitfield,/* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_ARM_THM_MOVT_PREL", /* name */
796 FALSE, /* partial_inplace */
797 0x040f70ff, /* src_mask */
798 0x040f70ff, /* dst_mask */
799 TRUE), /* pcrel_offset */
800
801 HOWTO (R_ARM_THM_JUMP19, /* type */
802 1, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 19, /* bitsize */
805 TRUE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_signed,/* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_ARM_THM_JUMP19", /* name */
810 FALSE, /* partial_inplace */
811 0x043f2fff, /* src_mask */
812 0x043f2fff, /* dst_mask */
813 TRUE), /* pcrel_offset */
814
815 HOWTO (R_ARM_THM_JUMP6, /* type */
816 1, /* rightshift */
817 1, /* size (0 = byte, 1 = short, 2 = long) */
818 6, /* bitsize */
819 TRUE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_unsigned,/* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_ARM_THM_JUMP6", /* name */
824 FALSE, /* partial_inplace */
825 0x02f8, /* src_mask */
826 0x02f8, /* dst_mask */
827 TRUE), /* pcrel_offset */
828
829 /* These are declared as 13-bit signed relocations because we can
830 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
831 versa. */
832 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
833 0, /* rightshift */
834 2, /* size (0 = byte, 1 = short, 2 = long) */
835 13, /* bitsize */
836 TRUE, /* pc_relative */
837 0, /* bitpos */
838 complain_overflow_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 };
1778
1779 static reloc_howto_type *
1780 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1781 bfd_reloc_code_real_type code)
1782 {
1783 unsigned int i;
1784 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1785 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1786 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1787
1788 return NULL;
1789 }
1790
1791 static reloc_howto_type *
1792 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1793 const char *r_name)
1794 {
1795 unsigned int i;
1796
1797 for (i = 0;
1798 i < (sizeof (elf32_arm_howto_table_1)
1799 / sizeof (elf32_arm_howto_table_1[0]));
1800 i++)
1801 if (elf32_arm_howto_table_1[i].name != NULL
1802 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1803 return &elf32_arm_howto_table_1[i];
1804
1805 for (i = 0;
1806 i < (sizeof (elf32_arm_howto_table_2)
1807 / sizeof (elf32_arm_howto_table_2[0]));
1808 i++)
1809 if (elf32_arm_howto_table_2[i].name != NULL
1810 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1811 return &elf32_arm_howto_table_2[i];
1812
1813 return NULL;
1814 }
1815
1816 /* Support for core dump NOTE sections */
1817 static bfd_boolean
1818 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1819 {
1820 int offset;
1821 size_t size;
1822
1823 switch (note->descsz)
1824 {
1825 default:
1826 return FALSE;
1827
1828 case 148: /* Linux/ARM 32-bit*/
1829 /* pr_cursig */
1830 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1831
1832 /* pr_pid */
1833 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1834
1835 /* pr_reg */
1836 offset = 72;
1837 size = 72;
1838
1839 break;
1840 }
1841
1842 /* Make a ".reg/999" section. */
1843 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1844 size, note->descpos + offset);
1845 }
1846
1847 static bfd_boolean
1848 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1849 {
1850 switch (note->descsz)
1851 {
1852 default:
1853 return FALSE;
1854
1855 case 124: /* Linux/ARM elf_prpsinfo */
1856 elf_tdata (abfd)->core_program
1857 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1858 elf_tdata (abfd)->core_command
1859 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1860 }
1861
1862 /* Note that for some reason, a spurious space is tacked
1863 onto the end of the args in some (at least one anyway)
1864 implementations, so strip it off if it exists. */
1865
1866 {
1867 char *command = elf_tdata (abfd)->core_command;
1868 int n = strlen (command);
1869
1870 if (0 < n && command[n - 1] == ' ')
1871 command[n - 1] = '\0';
1872 }
1873
1874 return TRUE;
1875 }
1876
1877 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1878 #define TARGET_LITTLE_NAME "elf32-littlearm"
1879 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1880 #define TARGET_BIG_NAME "elf32-bigarm"
1881
1882 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1883 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1884
1885 typedef unsigned long int insn32;
1886 typedef unsigned short int insn16;
1887
1888 /* In lieu of proper flags, assume all EABIv4 or later objects are
1889 interworkable. */
1890 #define INTERWORK_FLAG(abfd) \
1891 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1892 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1893
1894 /* The linker script knows the section names for placement.
1895 The entry_names are used to do simple name mangling on the stubs.
1896 Given a function name, and its type, the stub can be found. The
1897 name can be changed. The only requirement is the %s be present. */
1898 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1899 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1900
1901 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1902 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1903
1904 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1905 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1906
1907 /* The name of the dynamic interpreter. This is put in the .interp
1908 section. */
1909 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1910
1911 #ifdef FOUR_WORD_PLT
1912
1913 /* The first entry in a procedure linkage table looks like
1914 this. It is set up so that any shared library function that is
1915 called before the relocation has been set up calls the dynamic
1916 linker first. */
1917 static const bfd_vma elf32_arm_plt0_entry [] =
1918 {
1919 0xe52de004, /* str lr, [sp, #-4]! */
1920 0xe59fe010, /* ldr lr, [pc, #16] */
1921 0xe08fe00e, /* add lr, pc, lr */
1922 0xe5bef008, /* ldr pc, [lr, #8]! */
1923 };
1924
1925 /* Subsequent entries in a procedure linkage table look like
1926 this. */
1927 static const bfd_vma elf32_arm_plt_entry [] =
1928 {
1929 0xe28fc600, /* add ip, pc, #NN */
1930 0xe28cca00, /* add ip, ip, #NN */
1931 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1932 0x00000000, /* unused */
1933 };
1934
1935 #else
1936
1937 /* The first entry in a procedure linkage table looks like
1938 this. It is set up so that any shared library function that is
1939 called before the relocation has been set up calls the dynamic
1940 linker first. */
1941 static const bfd_vma elf32_arm_plt0_entry [] =
1942 {
1943 0xe52de004, /* str lr, [sp, #-4]! */
1944 0xe59fe004, /* ldr lr, [pc, #4] */
1945 0xe08fe00e, /* add lr, pc, lr */
1946 0xe5bef008, /* ldr pc, [lr, #8]! */
1947 0x00000000, /* &GOT[0] - . */
1948 };
1949
1950 /* Subsequent entries in a procedure linkage table look like
1951 this. */
1952 static const bfd_vma elf32_arm_plt_entry [] =
1953 {
1954 0xe28fc600, /* add ip, pc, #0xNN00000 */
1955 0xe28cca00, /* add ip, ip, #0xNN000 */
1956 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1957 };
1958
1959 #endif
1960
1961 /* The format of the first entry in the procedure linkage table
1962 for a VxWorks executable. */
1963 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1964 {
1965 0xe52dc008, /* str ip,[sp,#-8]! */
1966 0xe59fc000, /* ldr ip,[pc] */
1967 0xe59cf008, /* ldr pc,[ip,#8] */
1968 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1969 };
1970
1971 /* The format of subsequent entries in a VxWorks executable. */
1972 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1973 {
1974 0xe59fc000, /* ldr ip,[pc] */
1975 0xe59cf000, /* ldr pc,[ip] */
1976 0x00000000, /* .long @got */
1977 0xe59fc000, /* ldr ip,[pc] */
1978 0xea000000, /* b _PLT */
1979 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1980 };
1981
1982 /* The format of entries in a VxWorks shared library. */
1983 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1984 {
1985 0xe59fc000, /* ldr ip,[pc] */
1986 0xe79cf009, /* ldr pc,[ip,r9] */
1987 0x00000000, /* .long @got */
1988 0xe59fc000, /* ldr ip,[pc] */
1989 0xe599f008, /* ldr pc,[r9,#8] */
1990 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1991 };
1992
1993 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1994 #define PLT_THUMB_STUB_SIZE 4
1995 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1996 {
1997 0x4778, /* bx pc */
1998 0x46c0 /* nop */
1999 };
2000
2001 /* The entries in a PLT when using a DLL-based target with multiple
2002 address spaces. */
2003 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2004 {
2005 0xe51ff004, /* ldr pc, [pc, #-4] */
2006 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2007 };
2008
2009 /* Used to build a map of a section. This is required for mixed-endian
2010 code/data. */
2011
2012 typedef struct elf32_elf_section_map
2013 {
2014 bfd_vma vma;
2015 char type;
2016 }
2017 elf32_arm_section_map;
2018
2019 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2020
2021 typedef enum
2022 {
2023 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2024 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2025 VFP11_ERRATUM_ARM_VENEER,
2026 VFP11_ERRATUM_THUMB_VENEER
2027 }
2028 elf32_vfp11_erratum_type;
2029
2030 typedef struct elf32_vfp11_erratum_list
2031 {
2032 struct elf32_vfp11_erratum_list *next;
2033 bfd_vma vma;
2034 union
2035 {
2036 struct
2037 {
2038 struct elf32_vfp11_erratum_list *veneer;
2039 unsigned int vfp_insn;
2040 } b;
2041 struct
2042 {
2043 struct elf32_vfp11_erratum_list *branch;
2044 unsigned int id;
2045 } v;
2046 } u;
2047 elf32_vfp11_erratum_type type;
2048 }
2049 elf32_vfp11_erratum_list;
2050
2051 typedef struct _arm_elf_section_data
2052 {
2053 struct bfd_elf_section_data elf;
2054 unsigned int mapcount;
2055 unsigned int mapsize;
2056 elf32_arm_section_map *map;
2057 unsigned int erratumcount;
2058 elf32_vfp11_erratum_list *erratumlist;
2059 }
2060 _arm_elf_section_data;
2061
2062 #define elf32_arm_section_data(sec) \
2063 ((_arm_elf_section_data *) elf_section_data (sec))
2064
2065 /* The size of the thread control block. */
2066 #define TCB_SIZE 8
2067
2068 struct elf32_arm_obj_tdata
2069 {
2070 struct elf_obj_tdata root;
2071
2072 /* tls_type for each local got entry. */
2073 char *local_got_tls_type;
2074
2075 /* Zero to warn when linking objects with incompatible enum sizes. */
2076 int no_enum_size_warning;
2077 };
2078
2079 #define elf32_arm_tdata(abfd) \
2080 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
2081
2082 #define elf32_arm_local_got_tls_type(abfd) \
2083 (elf32_arm_tdata (abfd)->local_got_tls_type)
2084
2085 static bfd_boolean
2086 elf32_arm_mkobject (bfd *abfd)
2087 {
2088 if (abfd->tdata.any == NULL)
2089 {
2090 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
2091 abfd->tdata.any = bfd_zalloc (abfd, amt);
2092 if (abfd->tdata.any == NULL)
2093 return FALSE;
2094 }
2095 return bfd_elf_mkobject (abfd);
2096 }
2097
2098 /* The ARM linker needs to keep track of the number of relocs that it
2099 decides to copy in check_relocs for each symbol. This is so that
2100 it can discard PC relative relocs if it doesn't need them when
2101 linking with -Bsymbolic. We store the information in a field
2102 extending the regular ELF linker hash table. */
2103
2104 /* This structure keeps track of the number of relocs we have copied
2105 for a given symbol. */
2106 struct elf32_arm_relocs_copied
2107 {
2108 /* Next section. */
2109 struct elf32_arm_relocs_copied * next;
2110 /* A section in dynobj. */
2111 asection * section;
2112 /* Number of relocs copied in this section. */
2113 bfd_size_type count;
2114 /* Number of PC-relative relocs copied in this section. */
2115 bfd_size_type pc_count;
2116 };
2117
2118 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2119
2120 /* Arm ELF linker hash entry. */
2121 struct elf32_arm_link_hash_entry
2122 {
2123 struct elf_link_hash_entry root;
2124
2125 /* Number of PC relative relocs copied for this symbol. */
2126 struct elf32_arm_relocs_copied * relocs_copied;
2127
2128 /* We reference count Thumb references to a PLT entry separately,
2129 so that we can emit the Thumb trampoline only if needed. */
2130 bfd_signed_vma plt_thumb_refcount;
2131
2132 /* Some references from Thumb code may be eliminated by BL->BLX
2133 conversion, so record them separately. */
2134 bfd_signed_vma plt_maybe_thumb_refcount;
2135
2136 /* Since PLT entries have variable size if the Thumb prologue is
2137 used, we need to record the index into .got.plt instead of
2138 recomputing it from the PLT offset. */
2139 bfd_signed_vma plt_got_offset;
2140
2141 #define GOT_UNKNOWN 0
2142 #define GOT_NORMAL 1
2143 #define GOT_TLS_GD 2
2144 #define GOT_TLS_IE 4
2145 unsigned char tls_type;
2146
2147 /* The symbol marking the real symbol location for exported thumb
2148 symbols with Arm stubs. */
2149 struct elf_link_hash_entry *export_glue;
2150 };
2151
2152 /* Traverse an arm ELF linker hash table. */
2153 #define elf32_arm_link_hash_traverse(table, func, info) \
2154 (elf_link_hash_traverse \
2155 (&(table)->root, \
2156 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2157 (info)))
2158
2159 /* Get the ARM elf linker hash table from a link_info structure. */
2160 #define elf32_arm_hash_table(info) \
2161 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2162
2163 /* ARM ELF linker hash table. */
2164 struct elf32_arm_link_hash_table
2165 {
2166 /* The main hash table. */
2167 struct elf_link_hash_table root;
2168
2169 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2170 bfd_size_type thumb_glue_size;
2171
2172 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2173 bfd_size_type arm_glue_size;
2174
2175 /* The size in bytes of the section containing glue for VFP11 erratum
2176 veneers. */
2177 bfd_size_type vfp11_erratum_glue_size;
2178
2179 /* An arbitrary input BFD chosen to hold the glue sections. */
2180 bfd * bfd_of_glue_owner;
2181
2182 /* Nonzero to output a BE8 image. */
2183 int byteswap_code;
2184
2185 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2186 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2187 int target1_is_rel;
2188
2189 /* The relocation to use for R_ARM_TARGET2 relocations. */
2190 int target2_reloc;
2191
2192 /* Nonzero to fix BX instructions for ARMv4 targets. */
2193 int fix_v4bx;
2194
2195 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2196 int use_blx;
2197
2198 /* What sort of code sequences we should look for which may trigger the
2199 VFP11 denorm erratum. */
2200 bfd_arm_vfp11_fix vfp11_fix;
2201
2202 /* Global counter for the number of fixes we have emitted. */
2203 int num_vfp11_fixes;
2204
2205 /* Nonzero to force PIC branch veneers. */
2206 int pic_veneer;
2207
2208 /* The number of bytes in the initial entry in the PLT. */
2209 bfd_size_type plt_header_size;
2210
2211 /* The number of bytes in the subsequent PLT etries. */
2212 bfd_size_type plt_entry_size;
2213
2214 /* True if the target system is VxWorks. */
2215 int vxworks_p;
2216
2217 /* True if the target system is Symbian OS. */
2218 int symbian_p;
2219
2220 /* True if the target uses REL relocations. */
2221 int use_rel;
2222
2223 /* Short-cuts to get to dynamic linker sections. */
2224 asection *sgot;
2225 asection *sgotplt;
2226 asection *srelgot;
2227 asection *splt;
2228 asection *srelplt;
2229 asection *sdynbss;
2230 asection *srelbss;
2231
2232 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2233 asection *srelplt2;
2234
2235 /* Data for R_ARM_TLS_LDM32 relocations. */
2236 union {
2237 bfd_signed_vma refcount;
2238 bfd_vma offset;
2239 } tls_ldm_got;
2240
2241 /* Small local sym to section mapping cache. */
2242 struct sym_sec_cache sym_sec;
2243
2244 /* For convenience in allocate_dynrelocs. */
2245 bfd * obfd;
2246 };
2247
2248 /* Create an entry in an ARM ELF linker hash table. */
2249
2250 static struct bfd_hash_entry *
2251 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2252 struct bfd_hash_table * table,
2253 const char * string)
2254 {
2255 struct elf32_arm_link_hash_entry * ret =
2256 (struct elf32_arm_link_hash_entry *) entry;
2257
2258 /* Allocate the structure if it has not already been allocated by a
2259 subclass. */
2260 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
2261 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2262 if (ret == NULL)
2263 return (struct bfd_hash_entry *) ret;
2264
2265 /* Call the allocation method of the superclass. */
2266 ret = ((struct elf32_arm_link_hash_entry *)
2267 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2268 table, string));
2269 if (ret != NULL)
2270 {
2271 ret->relocs_copied = NULL;
2272 ret->tls_type = GOT_UNKNOWN;
2273 ret->plt_thumb_refcount = 0;
2274 ret->plt_maybe_thumb_refcount = 0;
2275 ret->plt_got_offset = -1;
2276 ret->export_glue = NULL;
2277 }
2278
2279 return (struct bfd_hash_entry *) ret;
2280 }
2281
2282 /* Return true if NAME is the name of the relocation section associated
2283 with S. */
2284
2285 static bfd_boolean
2286 reloc_section_p (struct elf32_arm_link_hash_table *htab,
2287 const char *name, asection *s)
2288 {
2289 if (htab->use_rel)
2290 return CONST_STRNEQ (name, ".rel") && strcmp (s->name, name + 4) == 0;
2291 else
2292 return CONST_STRNEQ (name, ".rela") && strcmp (s->name, name + 5) == 0;
2293 }
2294
2295 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2296 shortcuts to them in our hash table. */
2297
2298 static bfd_boolean
2299 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2300 {
2301 struct elf32_arm_link_hash_table *htab;
2302
2303 htab = elf32_arm_hash_table (info);
2304 /* BPABI objects never have a GOT, or associated sections. */
2305 if (htab->symbian_p)
2306 return TRUE;
2307
2308 if (! _bfd_elf_create_got_section (dynobj, info))
2309 return FALSE;
2310
2311 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2312 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2313 if (!htab->sgot || !htab->sgotplt)
2314 abort ();
2315
2316 htab->srelgot = bfd_make_section_with_flags (dynobj,
2317 RELOC_SECTION (htab, ".got"),
2318 (SEC_ALLOC | SEC_LOAD
2319 | SEC_HAS_CONTENTS
2320 | SEC_IN_MEMORY
2321 | SEC_LINKER_CREATED
2322 | SEC_READONLY));
2323 if (htab->srelgot == NULL
2324 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2325 return FALSE;
2326 return TRUE;
2327 }
2328
2329 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2330 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2331 hash table. */
2332
2333 static bfd_boolean
2334 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2335 {
2336 struct elf32_arm_link_hash_table *htab;
2337
2338 htab = elf32_arm_hash_table (info);
2339 if (!htab->sgot && !create_got_section (dynobj, info))
2340 return FALSE;
2341
2342 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2343 return FALSE;
2344
2345 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2346 htab->srelplt = bfd_get_section_by_name (dynobj,
2347 RELOC_SECTION (htab, ".plt"));
2348 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2349 if (!info->shared)
2350 htab->srelbss = bfd_get_section_by_name (dynobj,
2351 RELOC_SECTION (htab, ".bss"));
2352
2353 if (htab->vxworks_p)
2354 {
2355 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2356 return FALSE;
2357
2358 if (info->shared)
2359 {
2360 htab->plt_header_size = 0;
2361 htab->plt_entry_size
2362 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2363 }
2364 else
2365 {
2366 htab->plt_header_size
2367 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2368 htab->plt_entry_size
2369 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2370 }
2371 }
2372
2373 if (!htab->splt
2374 || !htab->srelplt
2375 || !htab->sdynbss
2376 || (!info->shared && !htab->srelbss))
2377 abort ();
2378
2379 return TRUE;
2380 }
2381
2382 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2383
2384 static void
2385 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2386 struct elf_link_hash_entry *dir,
2387 struct elf_link_hash_entry *ind)
2388 {
2389 struct elf32_arm_link_hash_entry *edir, *eind;
2390
2391 edir = (struct elf32_arm_link_hash_entry *) dir;
2392 eind = (struct elf32_arm_link_hash_entry *) ind;
2393
2394 if (eind->relocs_copied != NULL)
2395 {
2396 if (edir->relocs_copied != NULL)
2397 {
2398 struct elf32_arm_relocs_copied **pp;
2399 struct elf32_arm_relocs_copied *p;
2400
2401 /* Add reloc counts against the indirect sym to the direct sym
2402 list. Merge any entries against the same section. */
2403 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2404 {
2405 struct elf32_arm_relocs_copied *q;
2406
2407 for (q = edir->relocs_copied; q != NULL; q = q->next)
2408 if (q->section == p->section)
2409 {
2410 q->pc_count += p->pc_count;
2411 q->count += p->count;
2412 *pp = p->next;
2413 break;
2414 }
2415 if (q == NULL)
2416 pp = &p->next;
2417 }
2418 *pp = edir->relocs_copied;
2419 }
2420
2421 edir->relocs_copied = eind->relocs_copied;
2422 eind->relocs_copied = NULL;
2423 }
2424
2425 if (ind->root.type == bfd_link_hash_indirect)
2426 {
2427 /* Copy over PLT info. */
2428 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2429 eind->plt_thumb_refcount = 0;
2430 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
2431 eind->plt_maybe_thumb_refcount = 0;
2432
2433 if (dir->got.refcount <= 0)
2434 {
2435 edir->tls_type = eind->tls_type;
2436 eind->tls_type = GOT_UNKNOWN;
2437 }
2438 }
2439
2440 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2441 }
2442
2443 /* Create an ARM elf linker hash table. */
2444
2445 static struct bfd_link_hash_table *
2446 elf32_arm_link_hash_table_create (bfd *abfd)
2447 {
2448 struct elf32_arm_link_hash_table *ret;
2449 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2450
2451 ret = bfd_malloc (amt);
2452 if (ret == NULL)
2453 return NULL;
2454
2455 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2456 elf32_arm_link_hash_newfunc,
2457 sizeof (struct elf32_arm_link_hash_entry)))
2458 {
2459 free (ret);
2460 return NULL;
2461 }
2462
2463 ret->sgot = NULL;
2464 ret->sgotplt = NULL;
2465 ret->srelgot = NULL;
2466 ret->splt = NULL;
2467 ret->srelplt = NULL;
2468 ret->sdynbss = NULL;
2469 ret->srelbss = NULL;
2470 ret->srelplt2 = NULL;
2471 ret->thumb_glue_size = 0;
2472 ret->arm_glue_size = 0;
2473 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2474 ret->vfp11_erratum_glue_size = 0;
2475 ret->num_vfp11_fixes = 0;
2476 ret->bfd_of_glue_owner = NULL;
2477 ret->byteswap_code = 0;
2478 ret->target1_is_rel = 0;
2479 ret->target2_reloc = R_ARM_NONE;
2480 #ifdef FOUR_WORD_PLT
2481 ret->plt_header_size = 16;
2482 ret->plt_entry_size = 16;
2483 #else
2484 ret->plt_header_size = 20;
2485 ret->plt_entry_size = 12;
2486 #endif
2487 ret->fix_v4bx = 0;
2488 ret->use_blx = 0;
2489 ret->vxworks_p = 0;
2490 ret->symbian_p = 0;
2491 ret->use_rel = 1;
2492 ret->sym_sec.abfd = NULL;
2493 ret->obfd = abfd;
2494 ret->tls_ldm_got.refcount = 0;
2495
2496 return &ret->root.root;
2497 }
2498
2499 /* Locate the Thumb encoded calling stub for NAME. */
2500
2501 static struct elf_link_hash_entry *
2502 find_thumb_glue (struct bfd_link_info *link_info,
2503 const char *name,
2504 char **error_message)
2505 {
2506 char *tmp_name;
2507 struct elf_link_hash_entry *hash;
2508 struct elf32_arm_link_hash_table *hash_table;
2509
2510 /* We need a pointer to the armelf specific hash table. */
2511 hash_table = elf32_arm_hash_table (link_info);
2512
2513 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2514 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2515
2516 BFD_ASSERT (tmp_name);
2517
2518 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2519
2520 hash = elf_link_hash_lookup
2521 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2522
2523 if (hash == NULL
2524 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
2525 tmp_name, name) == -1)
2526 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
2527
2528 free (tmp_name);
2529
2530 return hash;
2531 }
2532
2533 /* Locate the ARM encoded calling stub for NAME. */
2534
2535 static struct elf_link_hash_entry *
2536 find_arm_glue (struct bfd_link_info *link_info,
2537 const char *name,
2538 char **error_message)
2539 {
2540 char *tmp_name;
2541 struct elf_link_hash_entry *myh;
2542 struct elf32_arm_link_hash_table *hash_table;
2543
2544 /* We need a pointer to the elfarm specific hash table. */
2545 hash_table = elf32_arm_hash_table (link_info);
2546
2547 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2548 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2549
2550 BFD_ASSERT (tmp_name);
2551
2552 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2553
2554 myh = elf_link_hash_lookup
2555 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2556
2557 if (myh == NULL
2558 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
2559 tmp_name, name) == -1)
2560 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
2561
2562 free (tmp_name);
2563
2564 return myh;
2565 }
2566
2567 /* ARM->Thumb glue (static images):
2568
2569 .arm
2570 __func_from_arm:
2571 ldr r12, __func_addr
2572 bx r12
2573 __func_addr:
2574 .word func @ behave as if you saw a ARM_32 reloc.
2575
2576 (v5t static images)
2577 .arm
2578 __func_from_arm:
2579 ldr pc, __func_addr
2580 __func_addr:
2581 .word func @ behave as if you saw a ARM_32 reloc.
2582
2583 (relocatable images)
2584 .arm
2585 __func_from_arm:
2586 ldr r12, __func_offset
2587 add r12, r12, pc
2588 bx r12
2589 __func_offset:
2590 .word func - .
2591 */
2592
2593 #define ARM2THUMB_STATIC_GLUE_SIZE 12
2594 static const insn32 a2t1_ldr_insn = 0xe59fc000;
2595 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
2596 static const insn32 a2t3_func_addr_insn = 0x00000001;
2597
2598 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
2599 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
2600 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
2601
2602 #define ARM2THUMB_PIC_GLUE_SIZE 16
2603 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
2604 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
2605 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
2606
2607 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
2608
2609 .thumb .thumb
2610 .align 2 .align 2
2611 __func_from_thumb: __func_from_thumb:
2612 bx pc push {r6, lr}
2613 nop ldr r6, __func_addr
2614 .arm mov lr, pc
2615 __func_change_to_arm: bx r6
2616 b func .arm
2617 __func_back_to_thumb:
2618 ldmia r13! {r6, lr}
2619 bx lr
2620 __func_addr:
2621 .word func */
2622
2623 #define THUMB2ARM_GLUE_SIZE 8
2624 static const insn16 t2a1_bx_pc_insn = 0x4778;
2625 static const insn16 t2a2_noop_insn = 0x46c0;
2626 static const insn32 t2a3_b_insn = 0xea000000;
2627
2628 #define VFP11_ERRATUM_VENEER_SIZE 8
2629
2630 #ifndef ELFARM_NABI_C_INCLUDED
2631 bfd_boolean
2632 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
2633 {
2634 asection * s;
2635 bfd_byte * foo;
2636 struct elf32_arm_link_hash_table * globals;
2637
2638 globals = elf32_arm_hash_table (info);
2639
2640 BFD_ASSERT (globals != NULL);
2641
2642 if (globals->arm_glue_size != 0)
2643 {
2644 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2645
2646 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2647 ARM2THUMB_GLUE_SECTION_NAME);
2648
2649 BFD_ASSERT (s != NULL);
2650
2651 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
2652
2653 BFD_ASSERT (s->size == globals->arm_glue_size);
2654 s->contents = foo;
2655 }
2656
2657 if (globals->thumb_glue_size != 0)
2658 {
2659 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2660
2661 s = bfd_get_section_by_name
2662 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2663
2664 BFD_ASSERT (s != NULL);
2665
2666 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
2667
2668 BFD_ASSERT (s->size == globals->thumb_glue_size);
2669 s->contents = foo;
2670 }
2671
2672 if (globals->vfp11_erratum_glue_size != 0)
2673 {
2674 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2675
2676 s = bfd_get_section_by_name
2677 (globals->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
2678
2679 BFD_ASSERT (s != NULL);
2680
2681 foo = bfd_alloc (globals->bfd_of_glue_owner,
2682 globals->vfp11_erratum_glue_size);
2683
2684 BFD_ASSERT (s->size == globals->vfp11_erratum_glue_size);
2685 s->contents = foo;
2686 }
2687
2688 return TRUE;
2689 }
2690
2691 /* Allocate space and symbols for calling a Thumb function from Arm mode.
2692 returns the symbol identifying teh stub. */
2693 static struct elf_link_hash_entry *
2694 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
2695 struct elf_link_hash_entry * h)
2696 {
2697 const char * name = h->root.root.string;
2698 asection * s;
2699 char * tmp_name;
2700 struct elf_link_hash_entry * myh;
2701 struct bfd_link_hash_entry * bh;
2702 struct elf32_arm_link_hash_table * globals;
2703 bfd_vma val;
2704 bfd_size_type size;
2705
2706 globals = elf32_arm_hash_table (link_info);
2707
2708 BFD_ASSERT (globals != NULL);
2709 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2710
2711 s = bfd_get_section_by_name
2712 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
2713
2714 BFD_ASSERT (s != NULL);
2715
2716 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2717
2718 BFD_ASSERT (tmp_name);
2719
2720 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2721
2722 myh = elf_link_hash_lookup
2723 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
2724
2725 if (myh != NULL)
2726 {
2727 /* We've already seen this guy. */
2728 free (tmp_name);
2729 return myh;
2730 }
2731
2732 /* The only trick here is using hash_table->arm_glue_size as the value.
2733 Even though the section isn't allocated yet, this is where we will be
2734 putting it. */
2735 bh = NULL;
2736 val = globals->arm_glue_size + 1;
2737 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2738 tmp_name, BSF_GLOBAL, s, val,
2739 NULL, TRUE, FALSE, &bh);
2740
2741 myh = (struct elf_link_hash_entry *) bh;
2742 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2743 myh->forced_local = 1;
2744
2745 free (tmp_name);
2746
2747 if (link_info->shared || globals->root.is_relocatable_executable
2748 || globals->pic_veneer)
2749 size = ARM2THUMB_PIC_GLUE_SIZE;
2750 else if (globals->use_blx)
2751 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
2752 else
2753 size = ARM2THUMB_STATIC_GLUE_SIZE;
2754
2755 s->size += size;
2756 globals->arm_glue_size += size;
2757
2758 return myh;
2759 }
2760
2761 static void
2762 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2763 struct elf_link_hash_entry *h)
2764 {
2765 const char *name = h->root.root.string;
2766 asection *s;
2767 char *tmp_name;
2768 struct elf_link_hash_entry *myh;
2769 struct bfd_link_hash_entry *bh;
2770 struct elf32_arm_link_hash_table *hash_table;
2771 bfd_vma val;
2772
2773 hash_table = elf32_arm_hash_table (link_info);
2774
2775 BFD_ASSERT (hash_table != NULL);
2776 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2777
2778 s = bfd_get_section_by_name
2779 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2780
2781 BFD_ASSERT (s != NULL);
2782
2783 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2784 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2785
2786 BFD_ASSERT (tmp_name);
2787
2788 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2789
2790 myh = elf_link_hash_lookup
2791 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2792
2793 if (myh != NULL)
2794 {
2795 /* We've already seen this guy. */
2796 free (tmp_name);
2797 return;
2798 }
2799
2800 bh = NULL;
2801 val = hash_table->thumb_glue_size + 1;
2802 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2803 tmp_name, BSF_GLOBAL, s, val,
2804 NULL, TRUE, FALSE, &bh);
2805
2806 /* If we mark it 'Thumb', the disassembler will do a better job. */
2807 myh = (struct elf_link_hash_entry *) bh;
2808 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2809 myh->forced_local = 1;
2810
2811 free (tmp_name);
2812
2813 #define CHANGE_TO_ARM "__%s_change_to_arm"
2814 #define BACK_FROM_ARM "__%s_back_from_arm"
2815
2816 /* Allocate another symbol to mark where we switch to Arm mode. */
2817 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2818 + strlen (CHANGE_TO_ARM) + 1);
2819
2820 BFD_ASSERT (tmp_name);
2821
2822 sprintf (tmp_name, CHANGE_TO_ARM, name);
2823
2824 bh = NULL;
2825 val = hash_table->thumb_glue_size + 4,
2826 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2827 tmp_name, BSF_LOCAL, s, val,
2828 NULL, TRUE, FALSE, &bh);
2829
2830 free (tmp_name);
2831
2832 s->size += THUMB2ARM_GLUE_SIZE;
2833 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2834
2835 return;
2836 }
2837
2838
2839 /* Add an entry to the code/data map for section SEC. */
2840
2841 static void
2842 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
2843 {
2844 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
2845 unsigned int newidx;
2846
2847 if (sec_data->map == NULL)
2848 {
2849 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
2850 sec_data->mapcount = 0;
2851 sec_data->mapsize = 1;
2852 }
2853
2854 newidx = sec_data->mapcount++;
2855
2856 if (sec_data->mapcount > sec_data->mapsize)
2857 {
2858 sec_data->mapsize *= 2;
2859 sec_data->map = bfd_realloc (sec_data->map, sec_data->mapsize
2860 * sizeof (elf32_arm_section_map));
2861 }
2862
2863 sec_data->map[newidx].vma = vma;
2864 sec_data->map[newidx].type = type;
2865 }
2866
2867
2868 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
2869 veneers are handled for now. */
2870
2871 static bfd_vma
2872 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
2873 elf32_vfp11_erratum_list *branch,
2874 bfd *branch_bfd,
2875 asection *branch_sec,
2876 unsigned int offset)
2877 {
2878 asection *s;
2879 struct elf32_arm_link_hash_table *hash_table;
2880 char *tmp_name;
2881 struct elf_link_hash_entry *myh;
2882 struct bfd_link_hash_entry *bh;
2883 bfd_vma val;
2884 struct _arm_elf_section_data *sec_data;
2885 int errcount;
2886 elf32_vfp11_erratum_list *newerr;
2887
2888 hash_table = elf32_arm_hash_table (link_info);
2889
2890 BFD_ASSERT (hash_table != NULL);
2891 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2892
2893 s = bfd_get_section_by_name
2894 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
2895
2896 sec_data = elf32_arm_section_data (s);
2897
2898 BFD_ASSERT (s != NULL);
2899
2900 tmp_name = bfd_malloc ((bfd_size_type) strlen
2901 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
2902
2903 BFD_ASSERT (tmp_name);
2904
2905 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
2906 hash_table->num_vfp11_fixes);
2907
2908 myh = elf_link_hash_lookup
2909 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
2910
2911 BFD_ASSERT (myh == NULL);
2912
2913 bh = NULL;
2914 val = hash_table->vfp11_erratum_glue_size;
2915 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2916 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
2917 NULL, TRUE, FALSE, &bh);
2918
2919 myh = (struct elf_link_hash_entry *) bh;
2920 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2921 myh->forced_local = 1;
2922
2923 /* Link veneer back to calling location. */
2924 errcount = ++(sec_data->erratumcount);
2925 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
2926
2927 newerr->type = VFP11_ERRATUM_ARM_VENEER;
2928 newerr->vma = -1;
2929 newerr->u.v.branch = branch;
2930 newerr->u.v.id = hash_table->num_vfp11_fixes;
2931 branch->u.b.veneer = newerr;
2932
2933 newerr->next = sec_data->erratumlist;
2934 sec_data->erratumlist = newerr;
2935
2936 /* A symbol for the return from the veneer. */
2937 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
2938 hash_table->num_vfp11_fixes);
2939
2940 myh = elf_link_hash_lookup
2941 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
2942
2943 if (myh != NULL)
2944 abort ();
2945
2946 bh = NULL;
2947 val = offset + 4;
2948 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
2949 branch_sec, val, NULL, TRUE, FALSE, &bh);
2950
2951 myh = (struct elf_link_hash_entry *) bh;
2952 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2953 myh->forced_local = 1;
2954
2955 free (tmp_name);
2956
2957 /* Generate a mapping symbol for the veneer section, and explicitly add an
2958 entry for that symbol to the code/data map for the section. */
2959 if (hash_table->vfp11_erratum_glue_size == 0)
2960 {
2961 bh = NULL;
2962 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
2963 ever requires this erratum fix. */
2964 _bfd_generic_link_add_one_symbol (link_info,
2965 hash_table->bfd_of_glue_owner, "$a",
2966 BSF_LOCAL, s, 0, NULL,
2967 TRUE, FALSE, &bh);
2968
2969 myh = (struct elf_link_hash_entry *) bh;
2970 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
2971 myh->forced_local = 1;
2972
2973 /* The elf32_arm_init_maps function only cares about symbols from input
2974 BFDs. We must make a note of this generated mapping symbol
2975 ourselves so that code byteswapping works properly in
2976 elf32_arm_write_section. */
2977 elf32_arm_section_map_add (s, 'a', 0);
2978 }
2979
2980 s->size += VFP11_ERRATUM_VENEER_SIZE;
2981 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
2982 hash_table->num_vfp11_fixes++;
2983
2984 /* The offset of the veneer. */
2985 return val;
2986 }
2987
2988 /* Add the glue sections to ABFD. This function is called from the
2989 linker scripts in ld/emultempl/{armelf}.em. */
2990
2991 bfd_boolean
2992 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
2993 struct bfd_link_info *info)
2994 {
2995 flagword flags;
2996 asection *sec;
2997
2998 /* If we are only performing a partial
2999 link do not bother adding the glue. */
3000 if (info->relocatable)
3001 return TRUE;
3002
3003 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
3004
3005 if (sec == NULL)
3006 {
3007 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
3008 will prevent elf_link_input_bfd() from processing the contents
3009 of this section. */
3010 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3011 | SEC_CODE | SEC_READONLY);
3012
3013 sec = bfd_make_section_with_flags (abfd,
3014 ARM2THUMB_GLUE_SECTION_NAME,
3015 flags);
3016
3017 if (sec == NULL
3018 || !bfd_set_section_alignment (abfd, sec, 2))
3019 return FALSE;
3020
3021 /* Set the gc mark to prevent the section from being removed by garbage
3022 collection, despite the fact that no relocs refer to this section. */
3023 sec->gc_mark = 1;
3024 }
3025
3026 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
3027
3028 if (sec == NULL)
3029 {
3030 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3031 | SEC_CODE | SEC_READONLY);
3032
3033 sec = bfd_make_section_with_flags (abfd,
3034 THUMB2ARM_GLUE_SECTION_NAME,
3035 flags);
3036
3037 if (sec == NULL
3038 || !bfd_set_section_alignment (abfd, sec, 2))
3039 return FALSE;
3040
3041 sec->gc_mark = 1;
3042 }
3043
3044 sec = bfd_get_section_by_name (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME);
3045
3046 if (sec == NULL)
3047 {
3048 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3049 | SEC_CODE | SEC_READONLY);
3050
3051 sec = bfd_make_section_with_flags (abfd,
3052 VFP11_ERRATUM_VENEER_SECTION_NAME,
3053 flags);
3054
3055 if (sec == NULL
3056 || !bfd_set_section_alignment (abfd, sec, 2))
3057 return FALSE;
3058
3059 sec->gc_mark = 1;
3060 }
3061
3062 return TRUE;
3063 }
3064
3065 /* Select a BFD to be used to hold the sections used by the glue code.
3066 This function is called from the linker scripts in ld/emultempl/
3067 {armelf/pe}.em */
3068
3069 bfd_boolean
3070 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
3071 {
3072 struct elf32_arm_link_hash_table *globals;
3073
3074 /* If we are only performing a partial link
3075 do not bother getting a bfd to hold the glue. */
3076 if (info->relocatable)
3077 return TRUE;
3078
3079 /* Make sure we don't attach the glue sections to a dynamic object. */
3080 BFD_ASSERT (!(abfd->flags & DYNAMIC));
3081
3082 globals = elf32_arm_hash_table (info);
3083
3084 BFD_ASSERT (globals != NULL);
3085
3086 if (globals->bfd_of_glue_owner != NULL)
3087 return TRUE;
3088
3089 /* Save the bfd for later use. */
3090 globals->bfd_of_glue_owner = abfd;
3091
3092 return TRUE;
3093 }
3094
3095 static void check_use_blx(struct elf32_arm_link_hash_table *globals)
3096 {
3097 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3098 Tag_CPU_arch) > 2)
3099 globals->use_blx = 1;
3100 }
3101
3102 bfd_boolean
3103 bfd_elf32_arm_process_before_allocation (bfd *abfd,
3104 struct bfd_link_info *link_info)
3105 {
3106 Elf_Internal_Shdr *symtab_hdr;
3107 Elf_Internal_Rela *internal_relocs = NULL;
3108 Elf_Internal_Rela *irel, *irelend;
3109 bfd_byte *contents = NULL;
3110
3111 asection *sec;
3112 struct elf32_arm_link_hash_table *globals;
3113
3114 /* If we are only performing a partial link do not bother
3115 to construct any glue. */
3116 if (link_info->relocatable)
3117 return TRUE;
3118
3119 /* Here we have a bfd that is to be included on the link. We have a hook
3120 to do reloc rummaging, before section sizes are nailed down. */
3121 globals = elf32_arm_hash_table (link_info);
3122 check_use_blx (globals);
3123
3124 BFD_ASSERT (globals != NULL);
3125 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3126
3127 if (globals->byteswap_code && !bfd_big_endian (abfd))
3128 {
3129 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
3130 abfd);
3131 return FALSE;
3132 }
3133
3134 /* Rummage around all the relocs and map the glue vectors. */
3135 sec = abfd->sections;
3136
3137 if (sec == NULL)
3138 return TRUE;
3139
3140 for (; sec != NULL; sec = sec->next)
3141 {
3142 if (sec->reloc_count == 0)
3143 continue;
3144
3145 if ((sec->flags & SEC_EXCLUDE) != 0)
3146 continue;
3147
3148 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3149
3150 /* Load the relocs. */
3151 internal_relocs
3152 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
3153 (Elf_Internal_Rela *) NULL, FALSE);
3154
3155 if (internal_relocs == NULL)
3156 goto error_return;
3157
3158 irelend = internal_relocs + sec->reloc_count;
3159 for (irel = internal_relocs; irel < irelend; irel++)
3160 {
3161 long r_type;
3162 unsigned long r_index;
3163
3164 struct elf_link_hash_entry *h;
3165
3166 r_type = ELF32_R_TYPE (irel->r_info);
3167 r_index = ELF32_R_SYM (irel->r_info);
3168
3169 /* These are the only relocation types we care about. */
3170 if ( r_type != R_ARM_PC24
3171 && r_type != R_ARM_PLT32
3172 && r_type != R_ARM_CALL
3173 && r_type != R_ARM_JUMP24
3174 && r_type != R_ARM_THM_CALL
3175 && r_type != R_ARM_THM_JUMP24)
3176 continue;
3177
3178 /* Get the section contents if we haven't done so already. */
3179 if (contents == NULL)
3180 {
3181 /* Get cached copy if it exists. */
3182 if (elf_section_data (sec)->this_hdr.contents != NULL)
3183 contents = elf_section_data (sec)->this_hdr.contents;
3184 else
3185 {
3186 /* Go get them off disk. */
3187 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3188 goto error_return;
3189 }
3190 }
3191
3192 /* If the relocation is not against a symbol it cannot concern us. */
3193 h = NULL;
3194
3195 /* We don't care about local symbols. */
3196 if (r_index < symtab_hdr->sh_info)
3197 continue;
3198
3199 /* This is an external symbol. */
3200 r_index -= symtab_hdr->sh_info;
3201 h = (struct elf_link_hash_entry *)
3202 elf_sym_hashes (abfd)[r_index];
3203
3204 /* If the relocation is against a static symbol it must be within
3205 the current section and so cannot be a cross ARM/Thumb relocation. */
3206 if (h == NULL)
3207 continue;
3208
3209 /* If the call will go through a PLT entry then we do not need
3210 glue. */
3211 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
3212 continue;
3213
3214 switch (r_type)
3215 {
3216 case R_ARM_PC24:
3217 case R_ARM_PLT32:
3218 case R_ARM_CALL:
3219 case R_ARM_JUMP24:
3220 /* This one is a call from arm code. We need to look up
3221 the target of the call. If it is a thumb target, we
3222 insert glue. */
3223 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
3224 && !(r_type == R_ARM_CALL && globals->use_blx))
3225 record_arm_to_thumb_glue (link_info, h);
3226 break;
3227
3228 case R_ARM_THM_CALL:
3229 case R_ARM_THM_JUMP24:
3230 /* This one is a call from thumb code. We look
3231 up the target of the call. If it is not a thumb
3232 target, we insert glue. */
3233 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC
3234 && !(globals->use_blx && r_type == R_ARM_THM_CALL)
3235 && h->root.type != bfd_link_hash_undefweak)
3236 record_thumb_to_arm_glue (link_info, h);
3237 break;
3238
3239 default:
3240 abort ();
3241 }
3242 }
3243
3244 if (contents != NULL
3245 && elf_section_data (sec)->this_hdr.contents != contents)
3246 free (contents);
3247 contents = NULL;
3248
3249 if (internal_relocs != NULL
3250 && elf_section_data (sec)->relocs != internal_relocs)
3251 free (internal_relocs);
3252 internal_relocs = NULL;
3253 }
3254
3255 return TRUE;
3256
3257 error_return:
3258 if (contents != NULL
3259 && elf_section_data (sec)->this_hdr.contents != contents)
3260 free (contents);
3261 if (internal_relocs != NULL
3262 && elf_section_data (sec)->relocs != internal_relocs)
3263 free (internal_relocs);
3264
3265 return FALSE;
3266 }
3267 #endif
3268
3269
3270 /* Initialise maps of ARM/Thumb/data for input BFDs. */
3271
3272 void
3273 bfd_elf32_arm_init_maps (bfd *abfd)
3274 {
3275 Elf_Internal_Sym *isymbuf;
3276 Elf_Internal_Shdr *hdr;
3277 unsigned int i, localsyms;
3278
3279 if ((abfd->flags & DYNAMIC) != 0)
3280 return;
3281
3282 hdr = &elf_tdata (abfd)->symtab_hdr;
3283 localsyms = hdr->sh_info;
3284
3285 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3286 should contain the number of local symbols, which should come before any
3287 global symbols. Mapping symbols are always local. */
3288 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
3289 NULL);
3290
3291 /* No internal symbols read? Skip this BFD. */
3292 if (isymbuf == NULL)
3293 return;
3294
3295 for (i = 0; i < localsyms; i++)
3296 {
3297 Elf_Internal_Sym *isym = &isymbuf[i];
3298 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3299 const char *name;
3300
3301 if (sec != NULL
3302 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3303 {
3304 name = bfd_elf_string_from_elf_section (abfd,
3305 hdr->sh_link, isym->st_name);
3306
3307 if (bfd_is_arm_special_symbol_name (name,
3308 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
3309 elf32_arm_section_map_add (sec, name[1], isym->st_value);
3310 }
3311 }
3312 }
3313
3314
3315 void
3316 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
3317 {
3318 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3319 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
3320
3321 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
3322 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
3323 {
3324 switch (globals->vfp11_fix)
3325 {
3326 case BFD_ARM_VFP11_FIX_DEFAULT:
3327 case BFD_ARM_VFP11_FIX_NONE:
3328 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3329 break;
3330
3331 default:
3332 /* Give a warning, but do as the user requests anyway. */
3333 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
3334 "workaround is not necessary for target architecture"), obfd);
3335 }
3336 }
3337 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
3338 /* For earlier architectures, we might need the workaround, but do not
3339 enable it by default. If users is running with broken hardware, they
3340 must enable the erratum fix explicitly. */
3341 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3342 }
3343
3344
3345 enum bfd_arm_vfp11_pipe {
3346 VFP11_FMAC,
3347 VFP11_LS,
3348 VFP11_DS,
3349 VFP11_BAD
3350 };
3351
3352 /* Return a VFP register number. This is encoded as RX:X for single-precision
3353 registers, or X:RX for double-precision registers, where RX is the group of
3354 four bits in the instruction encoding and X is the single extension bit.
3355 RX and X fields are specified using their lowest (starting) bit. The return
3356 value is:
3357
3358 0...31: single-precision registers s0...s31
3359 32...63: double-precision registers d0...d31.
3360
3361 Although X should be zero for VFP11 (encoding d0...d15 only), we might
3362 encounter VFP3 instructions, so we allow the full range for DP registers. */
3363
3364 static unsigned int
3365 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
3366 unsigned int x)
3367 {
3368 if (is_double)
3369 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
3370 else
3371 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
3372 }
3373
3374 /* Set bits in *WMASK according to a register number REG as encoded by
3375 bfd_arm_vfp11_regno(). Ignore d16-d31. */
3376
3377 static void
3378 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
3379 {
3380 if (reg < 32)
3381 *wmask |= 1 << reg;
3382 else if (reg < 48)
3383 *wmask |= 3 << ((reg - 32) * 2);
3384 }
3385
3386 /* Return TRUE if WMASK overwrites anything in REGS. */
3387
3388 static bfd_boolean
3389 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
3390 {
3391 int i;
3392
3393 for (i = 0; i < numregs; i++)
3394 {
3395 unsigned int reg = regs[i];
3396
3397 if (reg < 32 && (wmask & (1 << reg)) != 0)
3398 return TRUE;
3399
3400 reg -= 32;
3401
3402 if (reg >= 16)
3403 continue;
3404
3405 if ((wmask & (3 << (reg * 2))) != 0)
3406 return TRUE;
3407 }
3408
3409 return FALSE;
3410 }
3411
3412 /* In this function, we're interested in two things: finding input registers
3413 for VFP data-processing instructions, and finding the set of registers which
3414 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
3415 hold the written set, so FLDM etc. are easy to deal with (we're only
3416 interested in 32 SP registers or 16 dp registers, due to the VFP version
3417 implemented by the chip in question). DP registers are marked by setting
3418 both SP registers in the write mask). */
3419
3420 static enum bfd_arm_vfp11_pipe
3421 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
3422 int *numregs)
3423 {
3424 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
3425 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
3426
3427 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
3428 {
3429 unsigned int pqrs;
3430 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3431 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3432
3433 pqrs = ((insn & 0x00800000) >> 20)
3434 | ((insn & 0x00300000) >> 19)
3435 | ((insn & 0x00000040) >> 6);
3436
3437 switch (pqrs)
3438 {
3439 case 0: /* fmac[sd]. */
3440 case 1: /* fnmac[sd]. */
3441 case 2: /* fmsc[sd]. */
3442 case 3: /* fnmsc[sd]. */
3443 pipe = VFP11_FMAC;
3444 bfd_arm_vfp11_write_mask (destmask, fd);
3445 regs[0] = fd;
3446 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3447 regs[2] = fm;
3448 *numregs = 3;
3449 break;
3450
3451 case 4: /* fmul[sd]. */
3452 case 5: /* fnmul[sd]. */
3453 case 6: /* fadd[sd]. */
3454 case 7: /* fsub[sd]. */
3455 pipe = VFP11_FMAC;
3456 goto vfp_binop;
3457
3458 case 8: /* fdiv[sd]. */
3459 pipe = VFP11_DS;
3460 vfp_binop:
3461 bfd_arm_vfp11_write_mask (destmask, fd);
3462 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3463 regs[1] = fm;
3464 *numregs = 2;
3465 break;
3466
3467 case 15: /* extended opcode. */
3468 {
3469 unsigned int extn = ((insn >> 15) & 0x1e)
3470 | ((insn >> 7) & 1);
3471
3472 switch (extn)
3473 {
3474 case 0: /* fcpy[sd]. */
3475 case 1: /* fabs[sd]. */
3476 case 2: /* fneg[sd]. */
3477 case 8: /* fcmp[sd]. */
3478 case 9: /* fcmpe[sd]. */
3479 case 10: /* fcmpz[sd]. */
3480 case 11: /* fcmpez[sd]. */
3481 case 16: /* fuito[sd]. */
3482 case 17: /* fsito[sd]. */
3483 case 24: /* ftoui[sd]. */
3484 case 25: /* ftouiz[sd]. */
3485 case 26: /* ftosi[sd]. */
3486 case 27: /* ftosiz[sd]. */
3487 /* These instructions will not bounce due to underflow. */
3488 *numregs = 0;
3489 pipe = VFP11_FMAC;
3490 break;
3491
3492 case 3: /* fsqrt[sd]. */
3493 /* fsqrt cannot underflow, but it can (perhaps) overwrite
3494 registers to cause the erratum in previous instructions. */
3495 bfd_arm_vfp11_write_mask (destmask, fd);
3496 pipe = VFP11_DS;
3497 break;
3498
3499 case 15: /* fcvt{ds,sd}. */
3500 {
3501 int rnum = 0;
3502
3503 bfd_arm_vfp11_write_mask (destmask, fd);
3504
3505 /* Only FCVTSD can underflow. */
3506 if ((insn & 0x100) != 0)
3507 regs[rnum++] = fm;
3508
3509 *numregs = rnum;
3510
3511 pipe = VFP11_FMAC;
3512 }
3513 break;
3514
3515 default:
3516 return VFP11_BAD;
3517 }
3518 }
3519 break;
3520
3521 default:
3522 return VFP11_BAD;
3523 }
3524 }
3525 /* Two-register transfer. */
3526 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
3527 {
3528 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3529
3530 if ((insn & 0x100000) == 0)
3531 {
3532 if (is_double)
3533 bfd_arm_vfp11_write_mask (destmask, fm);
3534 else
3535 {
3536 bfd_arm_vfp11_write_mask (destmask, fm);
3537 bfd_arm_vfp11_write_mask (destmask, fm + 1);
3538 }
3539 }
3540
3541 pipe = VFP11_LS;
3542 }
3543 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
3544 {
3545 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3546 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
3547
3548 switch (puw)
3549 {
3550 case 0: /* Two-reg transfer. We should catch these above. */
3551 abort ();
3552
3553 case 2: /* fldm[sdx]. */
3554 case 3:
3555 case 5:
3556 {
3557 unsigned int i, offset = insn & 0xff;
3558
3559 if (is_double)
3560 offset >>= 1;
3561
3562 for (i = fd; i < fd + offset; i++)
3563 bfd_arm_vfp11_write_mask (destmask, i);
3564 }
3565 break;
3566
3567 case 4: /* fld[sd]. */
3568 case 6:
3569 bfd_arm_vfp11_write_mask (destmask, fd);
3570 break;
3571
3572 default:
3573 return VFP11_BAD;
3574 }
3575
3576 pipe = VFP11_LS;
3577 }
3578 /* Single-register transfer. Note L==0. */
3579 else if ((insn & 0x0f100e10) == 0x0e000a10)
3580 {
3581 unsigned int opcode = (insn >> 21) & 7;
3582 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
3583
3584 switch (opcode)
3585 {
3586 case 0: /* fmsr/fmdlr. */
3587 case 1: /* fmdhr. */
3588 /* Mark fmdhr and fmdlr as writing to the whole of the DP
3589 destination register. I don't know if this is exactly right,
3590 but it is the conservative choice. */
3591 bfd_arm_vfp11_write_mask (destmask, fn);
3592 break;
3593
3594 case 7: /* fmxr. */
3595 break;
3596 }
3597
3598 pipe = VFP11_LS;
3599 }
3600
3601 return pipe;
3602 }
3603
3604
3605 static int elf32_arm_compare_mapping (const void * a, const void * b);
3606
3607
3608 /* Look for potentially-troublesome code sequences which might trigger the
3609 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
3610 (available from ARM) for details of the erratum. A short version is
3611 described in ld.texinfo. */
3612
3613 bfd_boolean
3614 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
3615 {
3616 asection *sec;
3617 bfd_byte *contents = NULL;
3618 int state = 0;
3619 int regs[3], numregs = 0;
3620 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3621 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
3622
3623 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
3624 The states transition as follows:
3625
3626 0 -> 1 (vector) or 0 -> 2 (scalar)
3627 A VFP FMAC-pipeline instruction has been seen. Fill
3628 regs[0]..regs[numregs-1] with its input operands. Remember this
3629 instruction in 'first_fmac'.
3630
3631 1 -> 2
3632 Any instruction, except for a VFP instruction which overwrites
3633 regs[*].
3634
3635 1 -> 3 [ -> 0 ] or
3636 2 -> 3 [ -> 0 ]
3637 A VFP instruction has been seen which overwrites any of regs[*].
3638 We must make a veneer! Reset state to 0 before examining next
3639 instruction.
3640
3641 2 -> 0
3642 If we fail to match anything in state 2, reset to state 0 and reset
3643 the instruction pointer to the instruction after 'first_fmac'.
3644
3645 If the VFP11 vector mode is in use, there must be at least two unrelated
3646 instructions between anti-dependent VFP11 instructions to properly avoid
3647 triggering the erratum, hence the use of the extra state 1.
3648 */
3649
3650 /* If we are only performing a partial link do not bother
3651 to construct any glue. */
3652 if (link_info->relocatable)
3653 return TRUE;
3654
3655 /* We should have chosen a fix type by the time we get here. */
3656 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
3657
3658 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
3659 return TRUE;
3660
3661 /* Skip if this bfd does not correspond to an ELF image. */
3662 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
3663 return TRUE;
3664
3665 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3666 {
3667 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
3668 struct _arm_elf_section_data *sec_data;
3669
3670 /* If we don't have executable progbits, we're not interested in this
3671 section. Also skip if section is to be excluded. */
3672 if (elf_section_type (sec) != SHT_PROGBITS
3673 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
3674 || (sec->flags & SEC_EXCLUDE) != 0
3675 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
3676 continue;
3677
3678 sec_data = elf32_arm_section_data (sec);
3679
3680 if (sec_data->mapcount == 0)
3681 continue;
3682
3683 if (elf_section_data (sec)->this_hdr.contents != NULL)
3684 contents = elf_section_data (sec)->this_hdr.contents;
3685 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3686 goto error_return;
3687
3688 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
3689 elf32_arm_compare_mapping);
3690
3691 for (span = 0; span < sec_data->mapcount; span++)
3692 {
3693 unsigned int span_start = sec_data->map[span].vma;
3694 unsigned int span_end = (span == sec_data->mapcount - 1)
3695 ? sec->size : sec_data->map[span + 1].vma;
3696 char span_type = sec_data->map[span].type;
3697
3698 /* FIXME: Only ARM mode is supported at present. We may need to
3699 support Thumb-2 mode also at some point. */
3700 if (span_type != 'a')
3701 continue;
3702
3703 for (i = span_start; i < span_end;)
3704 {
3705 unsigned int next_i = i + 4;
3706 unsigned int insn = bfd_big_endian (abfd)
3707 ? (contents[i] << 24)
3708 | (contents[i + 1] << 16)
3709 | (contents[i + 2] << 8)
3710 | contents[i + 3]
3711 : (contents[i + 3] << 24)
3712 | (contents[i + 2] << 16)
3713 | (contents[i + 1] << 8)
3714 | contents[i];
3715 unsigned int writemask = 0;
3716 enum bfd_arm_vfp11_pipe pipe;
3717
3718 switch (state)
3719 {
3720 case 0:
3721 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
3722 &numregs);
3723 /* I'm assuming the VFP11 erratum can trigger with denorm
3724 operands on either the FMAC or the DS pipeline. This might
3725 lead to slightly overenthusiastic veneer insertion. */
3726 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
3727 {
3728 state = use_vector ? 1 : 2;
3729 first_fmac = i;
3730 veneer_of_insn = insn;
3731 }
3732 break;
3733
3734 case 1:
3735 {
3736 int other_regs[3], other_numregs;
3737 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3738 other_regs,
3739 &other_numregs);
3740 if (pipe != VFP11_BAD
3741 && bfd_arm_vfp11_antidependency (writemask, regs,
3742 numregs))
3743 state = 3;
3744 else
3745 state = 2;
3746 }
3747 break;
3748
3749 case 2:
3750 {
3751 int other_regs[3], other_numregs;
3752 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3753 other_regs,
3754 &other_numregs);
3755 if (pipe != VFP11_BAD
3756 && bfd_arm_vfp11_antidependency (writemask, regs,
3757 numregs))
3758 state = 3;
3759 else
3760 {
3761 state = 0;
3762 next_i = first_fmac + 4;
3763 }
3764 }
3765 break;
3766
3767 case 3:
3768 abort (); /* Should be unreachable. */
3769 }
3770
3771 if (state == 3)
3772 {
3773 elf32_vfp11_erratum_list *newerr
3774 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
3775 int errcount;
3776
3777 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
3778
3779 newerr->u.b.vfp_insn = veneer_of_insn;
3780
3781 switch (span_type)
3782 {
3783 case 'a':
3784 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
3785 break;
3786
3787 default:
3788 abort ();
3789 }
3790
3791 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
3792 first_fmac);
3793
3794 newerr->vma = -1;
3795
3796 newerr->next = sec_data->erratumlist;
3797 sec_data->erratumlist = newerr;
3798
3799 state = 0;
3800 }
3801
3802 i = next_i;
3803 }
3804 }
3805
3806 if (contents != NULL
3807 && elf_section_data (sec)->this_hdr.contents != contents)
3808 free (contents);
3809 contents = NULL;
3810 }
3811
3812 return TRUE;
3813
3814 error_return:
3815 if (contents != NULL
3816 && elf_section_data (sec)->this_hdr.contents != contents)
3817 free (contents);
3818
3819 return FALSE;
3820 }
3821
3822 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
3823 after sections have been laid out, using specially-named symbols. */
3824
3825 void
3826 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
3827 struct bfd_link_info *link_info)
3828 {
3829 asection *sec;
3830 struct elf32_arm_link_hash_table *globals;
3831 char *tmp_name;
3832
3833 if (link_info->relocatable)
3834 return;
3835
3836 /* Skip if this bfd does not correspond to an ELF image. */
3837 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
3838 return;
3839
3840 globals = elf32_arm_hash_table (link_info);
3841
3842 tmp_name = bfd_malloc ((bfd_size_type) strlen
3843 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
3844
3845 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3846 {
3847 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
3848 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
3849
3850 for (; errnode != NULL; errnode = errnode->next)
3851 {
3852 struct elf_link_hash_entry *myh;
3853 bfd_vma vma;
3854
3855 switch (errnode->type)
3856 {
3857 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
3858 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
3859 /* Find veneer symbol. */
3860 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
3861 errnode->u.b.veneer->u.v.id);
3862
3863 myh = elf_link_hash_lookup
3864 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
3865
3866 if (myh == NULL)
3867 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
3868 "`%s'"), abfd, tmp_name);
3869
3870 vma = myh->root.u.def.section->output_section->vma
3871 + myh->root.u.def.section->output_offset
3872 + myh->root.u.def.value;
3873
3874 errnode->u.b.veneer->vma = vma;
3875 break;
3876
3877 case VFP11_ERRATUM_ARM_VENEER:
3878 case VFP11_ERRATUM_THUMB_VENEER:
3879 /* Find return location. */
3880 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
3881 errnode->u.v.id);
3882
3883 myh = elf_link_hash_lookup
3884 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
3885
3886 if (myh == NULL)
3887 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
3888 "`%s'"), abfd, tmp_name);
3889
3890 vma = myh->root.u.def.section->output_section->vma
3891 + myh->root.u.def.section->output_offset
3892 + myh->root.u.def.value;
3893
3894 errnode->u.v.branch->vma = vma;
3895 break;
3896
3897 default:
3898 abort ();
3899 }
3900 }
3901 }
3902
3903 free (tmp_name);
3904 }
3905
3906
3907 /* Set target relocation values needed during linking. */
3908
3909 void
3910 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
3911 struct bfd_link_info *link_info,
3912 int target1_is_rel,
3913 char * target2_type,
3914 int fix_v4bx,
3915 int use_blx,
3916 bfd_arm_vfp11_fix vfp11_fix,
3917 int no_enum_warn, int pic_veneer)
3918 {
3919 struct elf32_arm_link_hash_table *globals;
3920
3921 globals = elf32_arm_hash_table (link_info);
3922
3923 globals->target1_is_rel = target1_is_rel;
3924 if (strcmp (target2_type, "rel") == 0)
3925 globals->target2_reloc = R_ARM_REL32;
3926 else if (strcmp (target2_type, "abs") == 0)
3927 globals->target2_reloc = R_ARM_ABS32;
3928 else if (strcmp (target2_type, "got-rel") == 0)
3929 globals->target2_reloc = R_ARM_GOT_PREL;
3930 else
3931 {
3932 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
3933 target2_type);
3934 }
3935 globals->fix_v4bx = fix_v4bx;
3936 globals->use_blx |= use_blx;
3937 globals->vfp11_fix = vfp11_fix;
3938 globals->pic_veneer = pic_veneer;
3939
3940 elf32_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3941 }
3942
3943 /* The thumb form of a long branch is a bit finicky, because the offset
3944 encoding is split over two fields, each in it's own instruction. They
3945 can occur in any order. So given a thumb form of long branch, and an
3946 offset, insert the offset into the thumb branch and return finished
3947 instruction.
3948
3949 It takes two thumb instructions to encode the target address. Each has
3950 11 bits to invest. The upper 11 bits are stored in one (identified by
3951 H-0.. see below), the lower 11 bits are stored in the other (identified
3952 by H-1).
3953
3954 Combine together and shifted left by 1 (it's a half word address) and
3955 there you have it.
3956
3957 Op: 1111 = F,
3958 H-0, upper address-0 = 000
3959 Op: 1111 = F,
3960 H-1, lower address-0 = 800
3961
3962 They can be ordered either way, but the arm tools I've seen always put
3963 the lower one first. It probably doesn't matter. krk@cygnus.com
3964
3965 XXX: Actually the order does matter. The second instruction (H-1)
3966 moves the computed address into the PC, so it must be the second one
3967 in the sequence. The problem, however is that whilst little endian code
3968 stores the instructions in HI then LOW order, big endian code does the
3969 reverse. nickc@cygnus.com. */
3970
3971 #define LOW_HI_ORDER 0xF800F000
3972 #define HI_LOW_ORDER 0xF000F800
3973
3974 static insn32
3975 insert_thumb_branch (insn32 br_insn, int rel_off)
3976 {
3977 unsigned int low_bits;
3978 unsigned int high_bits;
3979
3980 BFD_ASSERT ((rel_off & 1) != 1);
3981
3982 rel_off >>= 1; /* Half word aligned address. */
3983 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
3984 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
3985
3986 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
3987 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
3988 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
3989 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
3990 else
3991 /* FIXME: abort is probably not the right call. krk@cygnus.com */
3992 abort (); /* Error - not a valid branch instruction form. */
3993
3994 return br_insn;
3995 }
3996
3997
3998 /* Store an Arm insn into an output section not processed by
3999 elf32_arm_write_section. */
4000
4001 static void
4002 put_arm_insn (struct elf32_arm_link_hash_table *htab,
4003 bfd * output_bfd, bfd_vma val, void * ptr)
4004 {
4005 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4006 bfd_putl32 (val, ptr);
4007 else
4008 bfd_putb32 (val, ptr);
4009 }
4010
4011
4012 /* Store a 16-bit Thumb insn into an output section not processed by
4013 elf32_arm_write_section. */
4014
4015 static void
4016 put_thumb_insn (struct elf32_arm_link_hash_table *htab,
4017 bfd * output_bfd, bfd_vma val, void * ptr)
4018 {
4019 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4020 bfd_putl16 (val, ptr);
4021 else
4022 bfd_putb16 (val, ptr);
4023 }
4024
4025
4026 /* Thumb code calling an ARM function. */
4027
4028 static int
4029 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
4030 const char * name,
4031 bfd * input_bfd,
4032 bfd * output_bfd,
4033 asection * input_section,
4034 bfd_byte * hit_data,
4035 asection * sym_sec,
4036 bfd_vma offset,
4037 bfd_signed_vma addend,
4038 bfd_vma val,
4039 char **error_message)
4040 {
4041 asection * s = 0;
4042 bfd_vma my_offset;
4043 unsigned long int tmp;
4044 long int ret_offset;
4045 struct elf_link_hash_entry * myh;
4046 struct elf32_arm_link_hash_table * globals;
4047
4048 myh = find_thumb_glue (info, name, error_message);
4049 if (myh == NULL)
4050 return FALSE;
4051
4052 globals = elf32_arm_hash_table (info);
4053
4054 BFD_ASSERT (globals != NULL);
4055 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4056
4057 my_offset = myh->root.u.def.value;
4058
4059 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4060 THUMB2ARM_GLUE_SECTION_NAME);
4061
4062 BFD_ASSERT (s != NULL);
4063 BFD_ASSERT (s->contents != NULL);
4064 BFD_ASSERT (s->output_section != NULL);
4065
4066 if ((my_offset & 0x01) == 0x01)
4067 {
4068 if (sym_sec != NULL
4069 && sym_sec->owner != NULL
4070 && !INTERWORK_FLAG (sym_sec->owner))
4071 {
4072 (*_bfd_error_handler)
4073 (_("%B(%s): warning: interworking not enabled.\n"
4074 " first occurrence: %B: thumb call to arm"),
4075 sym_sec->owner, input_bfd, name);
4076
4077 return FALSE;
4078 }
4079
4080 --my_offset;
4081 myh->root.u.def.value = my_offset;
4082
4083 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
4084 s->contents + my_offset);
4085
4086 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
4087 s->contents + my_offset + 2);
4088
4089 ret_offset =
4090 /* Address of destination of the stub. */
4091 ((bfd_signed_vma) val)
4092 - ((bfd_signed_vma)
4093 /* Offset from the start of the current section
4094 to the start of the stubs. */
4095 (s->output_offset
4096 /* Offset of the start of this stub from the start of the stubs. */
4097 + my_offset
4098 /* Address of the start of the current section. */
4099 + s->output_section->vma)
4100 /* The branch instruction is 4 bytes into the stub. */
4101 + 4
4102 /* ARM branches work from the pc of the instruction + 8. */
4103 + 8);
4104
4105 put_arm_insn (globals, output_bfd,
4106 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
4107 s->contents + my_offset + 4);
4108 }
4109
4110 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
4111
4112 /* Now go back and fix up the original BL insn to point to here. */
4113 ret_offset =
4114 /* Address of where the stub is located. */
4115 (s->output_section->vma + s->output_offset + my_offset)
4116 /* Address of where the BL is located. */
4117 - (input_section->output_section->vma + input_section->output_offset
4118 + offset)
4119 /* Addend in the relocation. */
4120 - addend
4121 /* Biassing for PC-relative addressing. */
4122 - 8;
4123
4124 tmp = bfd_get_32 (input_bfd, hit_data
4125 - input_section->vma);
4126
4127 bfd_put_32 (output_bfd,
4128 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
4129 hit_data - input_section->vma);
4130
4131 return TRUE;
4132 }
4133
4134 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
4135
4136 static struct elf_link_hash_entry *
4137 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
4138 const char * name,
4139 bfd * input_bfd,
4140 bfd * output_bfd,
4141 asection * sym_sec,
4142 bfd_vma val,
4143 asection *s,
4144 char **error_message)
4145 {
4146 bfd_vma my_offset;
4147 long int ret_offset;
4148 struct elf_link_hash_entry * myh;
4149 struct elf32_arm_link_hash_table * globals;
4150
4151 myh = find_arm_glue (info, name, error_message);
4152 if (myh == NULL)
4153 return NULL;
4154
4155 globals = elf32_arm_hash_table (info);
4156
4157 BFD_ASSERT (globals != NULL);
4158 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4159
4160 my_offset = myh->root.u.def.value;
4161
4162 if ((my_offset & 0x01) == 0x01)
4163 {
4164 if (sym_sec != NULL
4165 && sym_sec->owner != NULL
4166 && !INTERWORK_FLAG (sym_sec->owner))
4167 {
4168 (*_bfd_error_handler)
4169 (_("%B(%s): warning: interworking not enabled.\n"
4170 " first occurrence: %B: arm call to thumb"),
4171 sym_sec->owner, input_bfd, name);
4172 }
4173
4174 --my_offset;
4175 myh->root.u.def.value = my_offset;
4176
4177 if (info->shared || globals->root.is_relocatable_executable
4178 || globals->pic_veneer)
4179 {
4180 /* For relocatable objects we can't use absolute addresses,
4181 so construct the address from a relative offset. */
4182 /* TODO: If the offset is small it's probably worth
4183 constructing the address with adds. */
4184 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
4185 s->contents + my_offset);
4186 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
4187 s->contents + my_offset + 4);
4188 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
4189 s->contents + my_offset + 8);
4190 /* Adjust the offset by 4 for the position of the add,
4191 and 8 for the pipeline offset. */
4192 ret_offset = (val - (s->output_offset
4193 + s->output_section->vma
4194 + my_offset + 12))
4195 | 1;
4196 bfd_put_32 (output_bfd, ret_offset,
4197 s->contents + my_offset + 12);
4198 }
4199 else if (globals->use_blx)
4200 {
4201 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
4202 s->contents + my_offset);
4203
4204 /* It's a thumb address. Add the low order bit. */
4205 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
4206 s->contents + my_offset + 4);
4207 }
4208 else
4209 {
4210 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
4211 s->contents + my_offset);
4212
4213 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
4214 s->contents + my_offset + 4);
4215
4216 /* It's a thumb address. Add the low order bit. */
4217 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
4218 s->contents + my_offset + 8);
4219 }
4220 }
4221
4222 BFD_ASSERT (my_offset <= globals->arm_glue_size);
4223
4224 return myh;
4225 }
4226
4227 /* Arm code calling a Thumb function. */
4228
4229 static int
4230 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
4231 const char * name,
4232 bfd * input_bfd,
4233 bfd * output_bfd,
4234 asection * input_section,
4235 bfd_byte * hit_data,
4236 asection * sym_sec,
4237 bfd_vma offset,
4238 bfd_signed_vma addend,
4239 bfd_vma val,
4240 char **error_message)
4241 {
4242 unsigned long int tmp;
4243 bfd_vma my_offset;
4244 asection * s;
4245 long int ret_offset;
4246 struct elf_link_hash_entry * myh;
4247 struct elf32_arm_link_hash_table * globals;
4248
4249 globals = elf32_arm_hash_table (info);
4250
4251 BFD_ASSERT (globals != NULL);
4252 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4253
4254 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4255 ARM2THUMB_GLUE_SECTION_NAME);
4256 BFD_ASSERT (s != NULL);
4257 BFD_ASSERT (s->contents != NULL);
4258 BFD_ASSERT (s->output_section != NULL);
4259
4260 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
4261 sym_sec, val, s, error_message);
4262 if (!myh)
4263 return FALSE;
4264
4265 my_offset = myh->root.u.def.value;
4266 tmp = bfd_get_32 (input_bfd, hit_data);
4267 tmp = tmp & 0xFF000000;
4268
4269 /* Somehow these are both 4 too far, so subtract 8. */
4270 ret_offset = (s->output_offset
4271 + my_offset
4272 + s->output_section->vma
4273 - (input_section->output_offset
4274 + input_section->output_section->vma
4275 + offset + addend)
4276 - 8);
4277
4278 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
4279
4280 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
4281
4282 return TRUE;
4283 }
4284
4285 /* Populate Arm stub for an exported Thumb function. */
4286
4287 static bfd_boolean
4288 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
4289 {
4290 struct bfd_link_info * info = (struct bfd_link_info *) inf;
4291 asection * s;
4292 struct elf_link_hash_entry * myh;
4293 struct elf32_arm_link_hash_entry *eh;
4294 struct elf32_arm_link_hash_table * globals;
4295 asection *sec;
4296 bfd_vma val;
4297 char *error_message;
4298
4299 eh = elf32_arm_hash_entry(h);
4300 /* Allocate stubs for exported Thumb functions on v4t. */
4301 if (eh->export_glue == NULL)
4302 return TRUE;
4303
4304 globals = elf32_arm_hash_table (info);
4305
4306 BFD_ASSERT (globals != NULL);
4307 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4308
4309 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4310 ARM2THUMB_GLUE_SECTION_NAME);
4311 BFD_ASSERT (s != NULL);
4312 BFD_ASSERT (s->contents != NULL);
4313 BFD_ASSERT (s->output_section != NULL);
4314
4315 sec = eh->export_glue->root.u.def.section;
4316
4317 BFD_ASSERT (sec->output_section != NULL);
4318
4319 val = eh->export_glue->root.u.def.value + sec->output_offset
4320 + sec->output_section->vma;
4321 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
4322 h->root.u.def.section->owner,
4323 globals->obfd, sec, val, s,
4324 &error_message);
4325 BFD_ASSERT (myh);
4326 return TRUE;
4327 }
4328
4329 /* Generate Arm stubs for exported Thumb symbols. */
4330 static void
4331 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
4332 struct bfd_link_info *link_info)
4333 {
4334 struct elf32_arm_link_hash_table * globals;
4335
4336 if (!link_info)
4337 return;
4338
4339 globals = elf32_arm_hash_table (link_info);
4340 /* If blx is available then exported Thumb symbols are OK and there is
4341 nothing to do. */
4342 if (globals->use_blx)
4343 return;
4344
4345 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
4346 link_info);
4347 }
4348
4349 /* Some relocations map to different relocations depending on the
4350 target. Return the real relocation. */
4351 static int
4352 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
4353 int r_type)
4354 {
4355 switch (r_type)
4356 {
4357 case R_ARM_TARGET1:
4358 if (globals->target1_is_rel)
4359 return R_ARM_REL32;
4360 else
4361 return R_ARM_ABS32;
4362
4363 case R_ARM_TARGET2:
4364 return globals->target2_reloc;
4365
4366 default:
4367 return r_type;
4368 }
4369 }
4370
4371 /* Return the base VMA address which should be subtracted from real addresses
4372 when resolving @dtpoff relocation.
4373 This is PT_TLS segment p_vaddr. */
4374
4375 static bfd_vma
4376 dtpoff_base (struct bfd_link_info *info)
4377 {
4378 /* If tls_sec is NULL, we should have signalled an error already. */
4379 if (elf_hash_table (info)->tls_sec == NULL)
4380 return 0;
4381 return elf_hash_table (info)->tls_sec->vma;
4382 }
4383
4384 /* Return the relocation value for @tpoff relocation
4385 if STT_TLS virtual address is ADDRESS. */
4386
4387 static bfd_vma
4388 tpoff (struct bfd_link_info *info, bfd_vma address)
4389 {
4390 struct elf_link_hash_table *htab = elf_hash_table (info);
4391 bfd_vma base;
4392
4393 /* If tls_sec is NULL, we should have signalled an error already. */
4394 if (htab->tls_sec == NULL)
4395 return 0;
4396 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
4397 return address - htab->tls_sec->vma + base;
4398 }
4399
4400 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
4401 VALUE is the relocation value. */
4402
4403 static bfd_reloc_status_type
4404 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
4405 {
4406 if (value > 0xfff)
4407 return bfd_reloc_overflow;
4408
4409 value |= bfd_get_32 (abfd, data) & 0xfffff000;
4410 bfd_put_32 (abfd, value, data);
4411 return bfd_reloc_ok;
4412 }
4413
4414 /* For a given value of n, calculate the value of G_n as required to
4415 deal with group relocations. We return it in the form of an
4416 encoded constant-and-rotation, together with the final residual. If n is
4417 specified as less than zero, then final_residual is filled with the
4418 input value and no further action is performed. */
4419
4420 static bfd_vma
4421 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
4422 {
4423 int current_n;
4424 bfd_vma g_n;
4425 bfd_vma encoded_g_n = 0;
4426 bfd_vma residual = value; /* Also known as Y_n. */
4427
4428 for (current_n = 0; current_n <= n; current_n++)
4429 {
4430 int shift;
4431
4432 /* Calculate which part of the value to mask. */
4433 if (residual == 0)
4434 shift = 0;
4435 else
4436 {
4437 int msb;
4438
4439 /* Determine the most significant bit in the residual and
4440 align the resulting value to a 2-bit boundary. */
4441 for (msb = 30; msb >= 0; msb -= 2)
4442 if (residual & (3 << msb))
4443 break;
4444
4445 /* The desired shift is now (msb - 6), or zero, whichever
4446 is the greater. */
4447 shift = msb - 6;
4448 if (shift < 0)
4449 shift = 0;
4450 }
4451
4452 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
4453 g_n = residual & (0xff << shift);
4454 encoded_g_n = (g_n >> shift)
4455 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
4456
4457 /* Calculate the residual for the next time around. */
4458 residual &= ~g_n;
4459 }
4460
4461 *final_residual = residual;
4462
4463 return encoded_g_n;
4464 }
4465
4466 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
4467 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
4468 static int
4469 identify_add_or_sub(bfd_vma insn)
4470 {
4471 int opcode = insn & 0x1e00000;
4472
4473 if (opcode == 1 << 23) /* ADD */
4474 return 1;
4475
4476 if (opcode == 1 << 22) /* SUB */
4477 return -1;
4478
4479 return 0;
4480 }
4481
4482 /* Determine if we're dealing with a Thumb-2 object. */
4483
4484 static int using_thumb2 (struct elf32_arm_link_hash_table *globals)
4485 {
4486 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4487 Tag_CPU_arch);
4488 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
4489 }
4490
4491 /* Perform a relocation as part of a final link. */
4492
4493 static bfd_reloc_status_type
4494 elf32_arm_final_link_relocate (reloc_howto_type * howto,
4495 bfd * input_bfd,
4496 bfd * output_bfd,
4497 asection * input_section,
4498 bfd_byte * contents,
4499 Elf_Internal_Rela * rel,
4500 bfd_vma value,
4501 struct bfd_link_info * info,
4502 asection * sym_sec,
4503 const char * sym_name,
4504 int sym_flags,
4505 struct elf_link_hash_entry * h,
4506 bfd_boolean * unresolved_reloc_p,
4507 char **error_message)
4508 {
4509 unsigned long r_type = howto->type;
4510 unsigned long r_symndx;
4511 bfd_byte * hit_data = contents + rel->r_offset;
4512 bfd * dynobj = NULL;
4513 Elf_Internal_Shdr * symtab_hdr;
4514 struct elf_link_hash_entry ** sym_hashes;
4515 bfd_vma * local_got_offsets;
4516 asection * sgot = NULL;
4517 asection * splt = NULL;
4518 asection * sreloc = NULL;
4519 bfd_vma addend;
4520 bfd_signed_vma signed_addend;
4521 struct elf32_arm_link_hash_table * globals;
4522
4523 globals = elf32_arm_hash_table (info);
4524
4525 /* Some relocation type map to different relocations depending on the
4526 target. We pick the right one here. */
4527 r_type = arm_real_reloc_type (globals, r_type);
4528 if (r_type != howto->type)
4529 howto = elf32_arm_howto_from_type (r_type);
4530
4531 /* If the start address has been set, then set the EF_ARM_HASENTRY
4532 flag. Setting this more than once is redundant, but the cost is
4533 not too high, and it keeps the code simple.
4534
4535 The test is done here, rather than somewhere else, because the
4536 start address is only set just before the final link commences.
4537
4538 Note - if the user deliberately sets a start address of 0, the
4539 flag will not be set. */
4540 if (bfd_get_start_address (output_bfd) != 0)
4541 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
4542
4543 dynobj = elf_hash_table (info)->dynobj;
4544 if (dynobj)
4545 {
4546 sgot = bfd_get_section_by_name (dynobj, ".got");
4547 splt = bfd_get_section_by_name (dynobj, ".plt");
4548 }
4549 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
4550 sym_hashes = elf_sym_hashes (input_bfd);
4551 local_got_offsets = elf_local_got_offsets (input_bfd);
4552 r_symndx = ELF32_R_SYM (rel->r_info);
4553
4554 if (globals->use_rel)
4555 {
4556 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
4557
4558 if (addend & ((howto->src_mask + 1) >> 1))
4559 {
4560 signed_addend = -1;
4561 signed_addend &= ~ howto->src_mask;
4562 signed_addend |= addend;
4563 }
4564 else
4565 signed_addend = addend;
4566 }
4567 else
4568 addend = signed_addend = rel->r_addend;
4569
4570 switch (r_type)
4571 {
4572 case R_ARM_NONE:
4573 /* We don't need to find a value for this symbol. It's just a
4574 marker. */
4575 *unresolved_reloc_p = FALSE;
4576 return bfd_reloc_ok;
4577
4578 case R_ARM_ABS12:
4579 if (!globals->vxworks_p)
4580 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4581
4582 case R_ARM_PC24:
4583 case R_ARM_ABS32:
4584 case R_ARM_ABS32_NOI:
4585 case R_ARM_REL32:
4586 case R_ARM_REL32_NOI:
4587 case R_ARM_CALL:
4588 case R_ARM_JUMP24:
4589 case R_ARM_XPC25:
4590 case R_ARM_PREL31:
4591 case R_ARM_PLT32:
4592 /* Handle relocations which should use the PLT entry. ABS32/REL32
4593 will use the symbol's value, which may point to a PLT entry, but we
4594 don't need to handle that here. If we created a PLT entry, all
4595 branches in this object should go to it. */
4596 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
4597 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
4598 && h != NULL
4599 && splt != NULL
4600 && h->plt.offset != (bfd_vma) -1)
4601 {
4602 /* If we've created a .plt section, and assigned a PLT entry to
4603 this function, it should not be known to bind locally. If
4604 it were, we would have cleared the PLT entry. */
4605 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
4606
4607 value = (splt->output_section->vma
4608 + splt->output_offset
4609 + h->plt.offset);
4610 *unresolved_reloc_p = FALSE;
4611 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4612 contents, rel->r_offset, value,
4613 rel->r_addend);
4614 }
4615
4616 /* When generating a shared object or relocatable executable, these
4617 relocations are copied into the output file to be resolved at
4618 run time. */
4619 if ((info->shared || globals->root.is_relocatable_executable)
4620 && (input_section->flags & SEC_ALLOC)
4621 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
4622 || !SYMBOL_CALLS_LOCAL (info, h))
4623 && (h == NULL
4624 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4625 || h->root.type != bfd_link_hash_undefweak)
4626 && r_type != R_ARM_PC24
4627 && r_type != R_ARM_CALL
4628 && r_type != R_ARM_JUMP24
4629 && r_type != R_ARM_PREL31
4630 && r_type != R_ARM_PLT32)
4631 {
4632 Elf_Internal_Rela outrel;
4633 bfd_byte *loc;
4634 bfd_boolean skip, relocate;
4635
4636 *unresolved_reloc_p = FALSE;
4637
4638 if (sreloc == NULL)
4639 {
4640 const char * name;
4641
4642 name = (bfd_elf_string_from_elf_section
4643 (input_bfd,
4644 elf_elfheader (input_bfd)->e_shstrndx,
4645 elf_section_data (input_section)->rel_hdr.sh_name));
4646 if (name == NULL)
4647 return bfd_reloc_notsupported;
4648
4649 BFD_ASSERT (reloc_section_p (globals, name, input_section));
4650
4651 sreloc = bfd_get_section_by_name (dynobj, name);
4652 BFD_ASSERT (sreloc != NULL);
4653 }
4654
4655 skip = FALSE;
4656 relocate = FALSE;
4657
4658 outrel.r_addend = addend;
4659 outrel.r_offset =
4660 _bfd_elf_section_offset (output_bfd, info, input_section,
4661 rel->r_offset);
4662 if (outrel.r_offset == (bfd_vma) -1)
4663 skip = TRUE;
4664 else if (outrel.r_offset == (bfd_vma) -2)
4665 skip = TRUE, relocate = TRUE;
4666 outrel.r_offset += (input_section->output_section->vma
4667 + input_section->output_offset);
4668
4669 if (skip)
4670 memset (&outrel, 0, sizeof outrel);
4671 else if (h != NULL
4672 && h->dynindx != -1
4673 && (!info->shared
4674 || !info->symbolic
4675 || !h->def_regular))
4676 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4677 else
4678 {
4679 int symbol;
4680
4681 /* This symbol is local, or marked to become local. */
4682 if (sym_flags == STT_ARM_TFUNC)
4683 value |= 1;
4684 if (globals->symbian_p)
4685 {
4686 asection *osec;
4687
4688 /* On Symbian OS, the data segment and text segement
4689 can be relocated independently. Therefore, we
4690 must indicate the segment to which this
4691 relocation is relative. The BPABI allows us to
4692 use any symbol in the right segment; we just use
4693 the section symbol as it is convenient. (We
4694 cannot use the symbol given by "h" directly as it
4695 will not appear in the dynamic symbol table.)
4696
4697 Note that the dynamic linker ignores the section
4698 symbol value, so we don't subtract osec->vma
4699 from the emitted reloc addend. */
4700 if (sym_sec)
4701 osec = sym_sec->output_section;
4702 else
4703 osec = input_section->output_section;
4704 symbol = elf_section_data (osec)->dynindx;
4705 if (symbol == 0)
4706 {
4707 struct elf_link_hash_table *htab = elf_hash_table (info);
4708
4709 if ((osec->flags & SEC_READONLY) == 0
4710 && htab->data_index_section != NULL)
4711 osec = htab->data_index_section;
4712 else
4713 osec = htab->text_index_section;
4714 symbol = elf_section_data (osec)->dynindx;
4715 }
4716 BFD_ASSERT (symbol != 0);
4717 }
4718 else
4719 /* On SVR4-ish systems, the dynamic loader cannot
4720 relocate the text and data segments independently,
4721 so the symbol does not matter. */
4722 symbol = 0;
4723 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
4724 if (globals->use_rel)
4725 relocate = TRUE;
4726 else
4727 outrel.r_addend += value;
4728 }
4729
4730 loc = sreloc->contents;
4731 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
4732 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4733
4734 /* If this reloc is against an external symbol, we do not want to
4735 fiddle with the addend. Otherwise, we need to include the symbol
4736 value so that it becomes an addend for the dynamic reloc. */
4737 if (! relocate)
4738 return bfd_reloc_ok;
4739
4740 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4741 contents, rel->r_offset, value,
4742 (bfd_vma) 0);
4743 }
4744 else switch (r_type)
4745 {
4746 case R_ARM_ABS12:
4747 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4748
4749 case R_ARM_XPC25: /* Arm BLX instruction. */
4750 case R_ARM_CALL:
4751 case R_ARM_JUMP24:
4752 case R_ARM_PC24: /* Arm B/BL instruction */
4753 case R_ARM_PLT32:
4754 if (r_type == R_ARM_XPC25)
4755 {
4756 /* Check for Arm calling Arm function. */
4757 /* FIXME: Should we translate the instruction into a BL
4758 instruction instead ? */
4759 if (sym_flags != STT_ARM_TFUNC)
4760 (*_bfd_error_handler)
4761 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
4762 input_bfd,
4763 h ? h->root.root.string : "(local)");
4764 }
4765 else if (r_type != R_ARM_CALL || !globals->use_blx)
4766 {
4767 /* Check for Arm calling Thumb function. */
4768 if (sym_flags == STT_ARM_TFUNC)
4769 {
4770 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
4771 output_bfd, input_section,
4772 hit_data, sym_sec, rel->r_offset,
4773 signed_addend, value,
4774 error_message))
4775 return bfd_reloc_ok;
4776 else
4777 return bfd_reloc_dangerous;
4778 }
4779 }
4780
4781 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
4782 where:
4783 S is the address of the symbol in the relocation.
4784 P is address of the instruction being relocated.
4785 A is the addend (extracted from the instruction) in bytes.
4786
4787 S is held in 'value'.
4788 P is the base address of the section containing the
4789 instruction plus the offset of the reloc into that
4790 section, ie:
4791 (input_section->output_section->vma +
4792 input_section->output_offset +
4793 rel->r_offset).
4794 A is the addend, converted into bytes, ie:
4795 (signed_addend * 4)
4796
4797 Note: None of these operations have knowledge of the pipeline
4798 size of the processor, thus it is up to the assembler to
4799 encode this information into the addend. */
4800 value -= (input_section->output_section->vma
4801 + input_section->output_offset);
4802 value -= rel->r_offset;
4803 if (globals->use_rel)
4804 value += (signed_addend << howto->size);
4805 else
4806 /* RELA addends do not have to be adjusted by howto->size. */
4807 value += signed_addend;
4808
4809 signed_addend = value;
4810 signed_addend >>= howto->rightshift;
4811
4812 /* A branch to an undefined weak symbol is turned into a jump to
4813 the next instruction. */
4814 if (h && h->root.type == bfd_link_hash_undefweak)
4815 {
4816 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000)
4817 | 0x0affffff;
4818 }
4819 else
4820 {
4821 /* Perform a signed range check. */
4822 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
4823 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
4824 return bfd_reloc_overflow;
4825
4826 addend = (value & 2);
4827
4828 value = (signed_addend & howto->dst_mask)
4829 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
4830
4831 /* Set the H bit in the BLX instruction. */
4832 if (sym_flags == STT_ARM_TFUNC)
4833 {
4834 if (addend)
4835 value |= (1 << 24);
4836 else
4837 value &= ~(bfd_vma)(1 << 24);
4838 }
4839 if (r_type == R_ARM_CALL)
4840 {
4841 /* Select the correct instruction (BL or BLX). */
4842 if (sym_flags == STT_ARM_TFUNC)
4843 value |= (1 << 28);
4844 else
4845 {
4846 value &= ~(bfd_vma)(1 << 28);
4847 value |= (1 << 24);
4848 }
4849 }
4850 }
4851 break;
4852
4853 case R_ARM_ABS32:
4854 value += addend;
4855 if (sym_flags == STT_ARM_TFUNC)
4856 value |= 1;
4857 break;
4858
4859 case R_ARM_ABS32_NOI:
4860 value += addend;
4861 break;
4862
4863 case R_ARM_REL32:
4864 value += addend;
4865 if (sym_flags == STT_ARM_TFUNC)
4866 value |= 1;
4867 value -= (input_section->output_section->vma
4868 + input_section->output_offset + rel->r_offset);
4869 break;
4870
4871 case R_ARM_REL32_NOI:
4872 value += addend;
4873 value -= (input_section->output_section->vma
4874 + input_section->output_offset + rel->r_offset);
4875 break;
4876
4877 case R_ARM_PREL31:
4878 value -= (input_section->output_section->vma
4879 + input_section->output_offset + rel->r_offset);
4880 value += signed_addend;
4881 if (! h || h->root.type != bfd_link_hash_undefweak)
4882 {
4883 /* Check for overflow */
4884 if ((value ^ (value >> 1)) & (1 << 30))
4885 return bfd_reloc_overflow;
4886 }
4887 value &= 0x7fffffff;
4888 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
4889 if (sym_flags == STT_ARM_TFUNC)
4890 value |= 1;
4891 break;
4892 }
4893
4894 bfd_put_32 (input_bfd, value, hit_data);
4895 return bfd_reloc_ok;
4896
4897 case R_ARM_ABS8:
4898 value += addend;
4899 if ((long) value > 0x7f || (long) value < -0x80)
4900 return bfd_reloc_overflow;
4901
4902 bfd_put_8 (input_bfd, value, hit_data);
4903 return bfd_reloc_ok;
4904
4905 case R_ARM_ABS16:
4906 value += addend;
4907
4908 if ((long) value > 0x7fff || (long) value < -0x8000)
4909 return bfd_reloc_overflow;
4910
4911 bfd_put_16 (input_bfd, value, hit_data);
4912 return bfd_reloc_ok;
4913
4914 case R_ARM_THM_ABS5:
4915 /* Support ldr and str instructions for the thumb. */
4916 if (globals->use_rel)
4917 {
4918 /* Need to refetch addend. */
4919 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
4920 /* ??? Need to determine shift amount from operand size. */
4921 addend >>= howto->rightshift;
4922 }
4923 value += addend;
4924
4925 /* ??? Isn't value unsigned? */
4926 if ((long) value > 0x1f || (long) value < -0x10)
4927 return bfd_reloc_overflow;
4928
4929 /* ??? Value needs to be properly shifted into place first. */
4930 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
4931 bfd_put_16 (input_bfd, value, hit_data);
4932 return bfd_reloc_ok;
4933
4934 case R_ARM_THM_ALU_PREL_11_0:
4935 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
4936 {
4937 bfd_vma insn;
4938 bfd_signed_vma relocation;
4939
4940 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4941 | bfd_get_16 (input_bfd, hit_data + 2);
4942
4943 if (globals->use_rel)
4944 {
4945 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
4946 | ((insn & (1 << 26)) >> 15);
4947 if (insn & 0xf00000)
4948 signed_addend = -signed_addend;
4949 }
4950
4951 relocation = value + signed_addend;
4952 relocation -= (input_section->output_section->vma
4953 + input_section->output_offset
4954 + rel->r_offset);
4955
4956 value = abs (relocation);
4957
4958 if (value >= 0x1000)
4959 return bfd_reloc_overflow;
4960
4961 insn = (insn & 0xfb0f8f00) | (value & 0xff)
4962 | ((value & 0x700) << 4)
4963 | ((value & 0x800) << 15);
4964 if (relocation < 0)
4965 insn |= 0xa00000;
4966
4967 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4968 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4969
4970 return bfd_reloc_ok;
4971 }
4972
4973 case R_ARM_THM_PC12:
4974 /* Corresponds to: ldr.w reg, [pc, #offset]. */
4975 {
4976 bfd_vma insn;
4977 bfd_signed_vma relocation;
4978
4979 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4980 | bfd_get_16 (input_bfd, hit_data + 2);
4981
4982 if (globals->use_rel)
4983 {
4984 signed_addend = insn & 0xfff;
4985 if (!(insn & (1 << 23)))
4986 signed_addend = -signed_addend;
4987 }
4988
4989 relocation = value + signed_addend;
4990 relocation -= (input_section->output_section->vma
4991 + input_section->output_offset
4992 + rel->r_offset);
4993
4994 value = abs (relocation);
4995
4996 if (value >= 0x1000)
4997 return bfd_reloc_overflow;
4998
4999 insn = (insn & 0xff7ff000) | value;
5000 if (relocation >= 0)
5001 insn |= (1 << 23);
5002
5003 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5004 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5005
5006 return bfd_reloc_ok;
5007 }
5008
5009 case R_ARM_THM_XPC22:
5010 case R_ARM_THM_CALL:
5011 case R_ARM_THM_JUMP24:
5012 /* Thumb BL (branch long instruction). */
5013 {
5014 bfd_vma relocation;
5015 bfd_vma reloc_sign;
5016 bfd_boolean overflow = FALSE;
5017 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5018 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5019 bfd_signed_vma reloc_signed_max;
5020 bfd_signed_vma reloc_signed_min;
5021 bfd_vma check;
5022 bfd_signed_vma signed_check;
5023 int bitsize;
5024 int thumb2 = using_thumb2 (globals);
5025
5026 /* A branch to an undefined weak symbol is turned into a jump to
5027 the next instruction. */
5028 if (h && h->root.type == bfd_link_hash_undefweak)
5029 {
5030 bfd_put_16 (input_bfd, 0xe000, hit_data);
5031 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
5032 return bfd_reloc_ok;
5033 }
5034
5035 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
5036 with Thumb-1) involving the J1 and J2 bits. */
5037 if (globals->use_rel)
5038 {
5039 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
5040 bfd_vma upper = upper_insn & 0x3ff;
5041 bfd_vma lower = lower_insn & 0x7ff;
5042 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
5043 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
5044 bfd_vma i1 = j1 ^ s ? 0 : 1;
5045 bfd_vma i2 = j2 ^ s ? 0 : 1;
5046
5047 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
5048 /* Sign extend. */
5049 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
5050
5051 signed_addend = addend;
5052 }
5053
5054 if (r_type == R_ARM_THM_XPC22)
5055 {
5056 /* Check for Thumb to Thumb call. */
5057 /* FIXME: Should we translate the instruction into a BL
5058 instruction instead ? */
5059 if (sym_flags == STT_ARM_TFUNC)
5060 (*_bfd_error_handler)
5061 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
5062 input_bfd,
5063 h ? h->root.root.string : "(local)");
5064 }
5065 else
5066 {
5067 /* If it is not a call to Thumb, assume call to Arm.
5068 If it is a call relative to a section name, then it is not a
5069 function call at all, but rather a long jump. Calls through
5070 the PLT do not require stubs. */
5071 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
5072 && (h == NULL || splt == NULL
5073 || h->plt.offset == (bfd_vma) -1))
5074 {
5075 if (globals->use_blx && r_type == R_ARM_THM_CALL)
5076 {
5077 /* Convert BL to BLX. */
5078 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5079 }
5080 else if (elf32_thumb_to_arm_stub
5081 (info, sym_name, input_bfd, output_bfd, input_section,
5082 hit_data, sym_sec, rel->r_offset, signed_addend, value,
5083 error_message))
5084 return bfd_reloc_ok;
5085 else
5086 return bfd_reloc_dangerous;
5087 }
5088 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
5089 && r_type == R_ARM_THM_CALL)
5090 {
5091 /* Make sure this is a BL. */
5092 lower_insn |= 0x1800;
5093 }
5094 }
5095
5096 /* Handle calls via the PLT. */
5097 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
5098 {
5099 value = (splt->output_section->vma
5100 + splt->output_offset
5101 + h->plt.offset);
5102 if (globals->use_blx && r_type == R_ARM_THM_CALL)
5103 {
5104 /* If the Thumb BLX instruction is available, convert the
5105 BL to a BLX instruction to call the ARM-mode PLT entry. */
5106 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5107 }
5108 else
5109 /* Target the Thumb stub before the ARM PLT entry. */
5110 value -= PLT_THUMB_STUB_SIZE;
5111 *unresolved_reloc_p = FALSE;
5112 }
5113
5114 relocation = value + signed_addend;
5115
5116 relocation -= (input_section->output_section->vma
5117 + input_section->output_offset
5118 + rel->r_offset);
5119
5120 check = relocation >> howto->rightshift;
5121
5122 /* If this is a signed value, the rightshift just dropped
5123 leading 1 bits (assuming twos complement). */
5124 if ((bfd_signed_vma) relocation >= 0)
5125 signed_check = check;
5126 else
5127 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
5128
5129 /* Calculate the permissable maximum and minimum values for
5130 this relocation according to whether we're relocating for
5131 Thumb-2 or not. */
5132 bitsize = howto->bitsize;
5133 if (!thumb2)
5134 bitsize -= 2;
5135 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
5136 reloc_signed_min = ~reloc_signed_max;
5137
5138 /* Assumes two's complement. */
5139 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5140 overflow = TRUE;
5141
5142 if ((lower_insn & 0x5000) == 0x4000)
5143 /* For a BLX instruction, make sure that the relocation is rounded up
5144 to a word boundary. This follows the semantics of the instruction
5145 which specifies that bit 1 of the target address will come from bit
5146 1 of the base address. */
5147 relocation = (relocation + 2) & ~ 3;
5148
5149 /* Put RELOCATION back into the insn. Assumes two's complement.
5150 We use the Thumb-2 encoding, which is safe even if dealing with
5151 a Thumb-1 instruction by virtue of our overflow check above. */
5152 reloc_sign = (signed_check < 0) ? 1 : 0;
5153 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
5154 | ((relocation >> 12) & 0x3ff)
5155 | (reloc_sign << 10);
5156 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
5157 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
5158 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
5159 | ((relocation >> 1) & 0x7ff);
5160
5161 /* Put the relocated value back in the object file: */
5162 bfd_put_16 (input_bfd, upper_insn, hit_data);
5163 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5164
5165 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5166 }
5167 break;
5168
5169 case R_ARM_THM_JUMP19:
5170 /* Thumb32 conditional branch instruction. */
5171 {
5172 bfd_vma relocation;
5173 bfd_boolean overflow = FALSE;
5174 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5175 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5176 bfd_signed_vma reloc_signed_max = 0xffffe;
5177 bfd_signed_vma reloc_signed_min = -0x100000;
5178 bfd_signed_vma signed_check;
5179
5180 /* Need to refetch the addend, reconstruct the top three bits,
5181 and squish the two 11 bit pieces together. */
5182 if (globals->use_rel)
5183 {
5184 bfd_vma S = (upper_insn & 0x0400) >> 10;
5185 bfd_vma upper = (upper_insn & 0x003f);
5186 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
5187 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
5188 bfd_vma lower = (lower_insn & 0x07ff);
5189
5190 upper |= J1 << 6;
5191 upper |= J2 << 7;
5192 upper |= (!S) << 8;
5193 upper -= 0x0100; /* Sign extend. */
5194
5195 addend = (upper << 12) | (lower << 1);
5196 signed_addend = addend;
5197 }
5198
5199 /* Handle calls via the PLT. */
5200 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
5201 {
5202 value = (splt->output_section->vma
5203 + splt->output_offset
5204 + h->plt.offset);
5205 /* Target the Thumb stub before the ARM PLT entry. */
5206 value -= PLT_THUMB_STUB_SIZE;
5207 *unresolved_reloc_p = FALSE;
5208 }
5209
5210 /* ??? Should handle interworking? GCC might someday try to
5211 use this for tail calls. */
5212
5213 relocation = value + signed_addend;
5214 relocation -= (input_section->output_section->vma
5215 + input_section->output_offset
5216 + rel->r_offset);
5217 signed_check = (bfd_signed_vma) relocation;
5218
5219 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5220 overflow = TRUE;
5221
5222 /* Put RELOCATION back into the insn. */
5223 {
5224 bfd_vma S = (relocation & 0x00100000) >> 20;
5225 bfd_vma J2 = (relocation & 0x00080000) >> 19;
5226 bfd_vma J1 = (relocation & 0x00040000) >> 18;
5227 bfd_vma hi = (relocation & 0x0003f000) >> 12;
5228 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
5229
5230 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
5231 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
5232 }
5233
5234 /* Put the relocated value back in the object file: */
5235 bfd_put_16 (input_bfd, upper_insn, hit_data);
5236 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5237
5238 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5239 }
5240
5241 case R_ARM_THM_JUMP11:
5242 case R_ARM_THM_JUMP8:
5243 case R_ARM_THM_JUMP6:
5244 /* Thumb B (branch) instruction). */
5245 {
5246 bfd_signed_vma relocation;
5247 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
5248 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
5249 bfd_signed_vma signed_check;
5250
5251 /* CZB cannot jump backward. */
5252 if (r_type == R_ARM_THM_JUMP6)
5253 reloc_signed_min = 0;
5254
5255 if (globals->use_rel)
5256 {
5257 /* Need to refetch addend. */
5258 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
5259 if (addend & ((howto->src_mask + 1) >> 1))
5260 {
5261 signed_addend = -1;
5262 signed_addend &= ~ howto->src_mask;
5263 signed_addend |= addend;
5264 }
5265 else
5266 signed_addend = addend;
5267 /* The value in the insn has been right shifted. We need to
5268 undo this, so that we can perform the address calculation
5269 in terms of bytes. */
5270 signed_addend <<= howto->rightshift;
5271 }
5272 relocation = value + signed_addend;
5273
5274 relocation -= (input_section->output_section->vma
5275 + input_section->output_offset
5276 + rel->r_offset);
5277
5278 relocation >>= howto->rightshift;
5279 signed_check = relocation;
5280
5281 if (r_type == R_ARM_THM_JUMP6)
5282 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
5283 else
5284 relocation &= howto->dst_mask;
5285 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
5286
5287 bfd_put_16 (input_bfd, relocation, hit_data);
5288
5289 /* Assumes two's complement. */
5290 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5291 return bfd_reloc_overflow;
5292
5293 return bfd_reloc_ok;
5294 }
5295
5296 case R_ARM_ALU_PCREL7_0:
5297 case R_ARM_ALU_PCREL15_8:
5298 case R_ARM_ALU_PCREL23_15:
5299 {
5300 bfd_vma insn;
5301 bfd_vma relocation;
5302
5303 insn = bfd_get_32 (input_bfd, hit_data);
5304 if (globals->use_rel)
5305 {
5306 /* Extract the addend. */
5307 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
5308 signed_addend = addend;
5309 }
5310 relocation = value + signed_addend;
5311
5312 relocation -= (input_section->output_section->vma
5313 + input_section->output_offset
5314 + rel->r_offset);
5315 insn = (insn & ~0xfff)
5316 | ((howto->bitpos << 7) & 0xf00)
5317 | ((relocation >> howto->bitpos) & 0xff);
5318 bfd_put_32 (input_bfd, value, hit_data);
5319 }
5320 return bfd_reloc_ok;
5321
5322 case R_ARM_GNU_VTINHERIT:
5323 case R_ARM_GNU_VTENTRY:
5324 return bfd_reloc_ok;
5325
5326 case R_ARM_GOTOFF32:
5327 /* Relocation is relative to the start of the
5328 global offset table. */
5329
5330 BFD_ASSERT (sgot != NULL);
5331 if (sgot == NULL)
5332 return bfd_reloc_notsupported;
5333
5334 /* If we are addressing a Thumb function, we need to adjust the
5335 address by one, so that attempts to call the function pointer will
5336 correctly interpret it as Thumb code. */
5337 if (sym_flags == STT_ARM_TFUNC)
5338 value += 1;
5339
5340 /* Note that sgot->output_offset is not involved in this
5341 calculation. We always want the start of .got. If we
5342 define _GLOBAL_OFFSET_TABLE in a different way, as is
5343 permitted by the ABI, we might have to change this
5344 calculation. */
5345 value -= sgot->output_section->vma;
5346 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5347 contents, rel->r_offset, value,
5348 rel->r_addend);
5349
5350 case R_ARM_GOTPC:
5351 /* Use global offset table as symbol value. */
5352 BFD_ASSERT (sgot != NULL);
5353
5354 if (sgot == NULL)
5355 return bfd_reloc_notsupported;
5356
5357 *unresolved_reloc_p = FALSE;
5358 value = sgot->output_section->vma;
5359 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5360 contents, rel->r_offset, value,
5361 rel->r_addend);
5362
5363 case R_ARM_GOT32:
5364 case R_ARM_GOT_PREL:
5365 /* Relocation is to the entry for this symbol in the
5366 global offset table. */
5367 if (sgot == NULL)
5368 return bfd_reloc_notsupported;
5369
5370 if (h != NULL)
5371 {
5372 bfd_vma off;
5373 bfd_boolean dyn;
5374
5375 off = h->got.offset;
5376 BFD_ASSERT (off != (bfd_vma) -1);
5377 dyn = globals->root.dynamic_sections_created;
5378
5379 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5380 || (info->shared
5381 && SYMBOL_REFERENCES_LOCAL (info, h))
5382 || (ELF_ST_VISIBILITY (h->other)
5383 && h->root.type == bfd_link_hash_undefweak))
5384 {
5385 /* This is actually a static link, or it is a -Bsymbolic link
5386 and the symbol is defined locally. We must initialize this
5387 entry in the global offset table. Since the offset must
5388 always be a multiple of 4, we use the least significant bit
5389 to record whether we have initialized it already.
5390
5391 When doing a dynamic link, we create a .rel(a).got relocation
5392 entry to initialize the value. This is done in the
5393 finish_dynamic_symbol routine. */
5394 if ((off & 1) != 0)
5395 off &= ~1;
5396 else
5397 {
5398 /* If we are addressing a Thumb function, we need to
5399 adjust the address by one, so that attempts to
5400 call the function pointer will correctly
5401 interpret it as Thumb code. */
5402 if (sym_flags == STT_ARM_TFUNC)
5403 value |= 1;
5404
5405 bfd_put_32 (output_bfd, value, sgot->contents + off);
5406 h->got.offset |= 1;
5407 }
5408 }
5409 else
5410 *unresolved_reloc_p = FALSE;
5411
5412 value = sgot->output_offset + off;
5413 }
5414 else
5415 {
5416 bfd_vma off;
5417
5418 BFD_ASSERT (local_got_offsets != NULL &&
5419 local_got_offsets[r_symndx] != (bfd_vma) -1);
5420
5421 off = local_got_offsets[r_symndx];
5422
5423 /* The offset must always be a multiple of 4. We use the
5424 least significant bit to record whether we have already
5425 generated the necessary reloc. */
5426 if ((off & 1) != 0)
5427 off &= ~1;
5428 else
5429 {
5430 /* If we are addressing a Thumb function, we need to
5431 adjust the address by one, so that attempts to
5432 call the function pointer will correctly
5433 interpret it as Thumb code. */
5434 if (sym_flags == STT_ARM_TFUNC)
5435 value |= 1;
5436
5437 if (globals->use_rel)
5438 bfd_put_32 (output_bfd, value, sgot->contents + off);
5439
5440 if (info->shared)
5441 {
5442 asection * srelgot;
5443 Elf_Internal_Rela outrel;
5444 bfd_byte *loc;
5445
5446 srelgot = (bfd_get_section_by_name
5447 (dynobj, RELOC_SECTION (globals, ".got")));
5448 BFD_ASSERT (srelgot != NULL);
5449
5450 outrel.r_addend = addend + value;
5451 outrel.r_offset = (sgot->output_section->vma
5452 + sgot->output_offset
5453 + off);
5454 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5455 loc = srelgot->contents;
5456 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
5457 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5458 }
5459
5460 local_got_offsets[r_symndx] |= 1;
5461 }
5462
5463 value = sgot->output_offset + off;
5464 }
5465 if (r_type != R_ARM_GOT32)
5466 value += sgot->output_section->vma;
5467
5468 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5469 contents, rel->r_offset, value,
5470 rel->r_addend);
5471
5472 case R_ARM_TLS_LDO32:
5473 value = value - dtpoff_base (info);
5474
5475 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5476 contents, rel->r_offset, value,
5477 rel->r_addend);
5478
5479 case R_ARM_TLS_LDM32:
5480 {
5481 bfd_vma off;
5482
5483 if (globals->sgot == NULL)
5484 abort ();
5485
5486 off = globals->tls_ldm_got.offset;
5487
5488 if ((off & 1) != 0)
5489 off &= ~1;
5490 else
5491 {
5492 /* If we don't know the module number, create a relocation
5493 for it. */
5494 if (info->shared)
5495 {
5496 Elf_Internal_Rela outrel;
5497 bfd_byte *loc;
5498
5499 if (globals->srelgot == NULL)
5500 abort ();
5501
5502 outrel.r_addend = 0;
5503 outrel.r_offset = (globals->sgot->output_section->vma
5504 + globals->sgot->output_offset + off);
5505 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
5506
5507 if (globals->use_rel)
5508 bfd_put_32 (output_bfd, outrel.r_addend,
5509 globals->sgot->contents + off);
5510
5511 loc = globals->srelgot->contents;
5512 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
5513 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5514 }
5515 else
5516 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
5517
5518 globals->tls_ldm_got.offset |= 1;
5519 }
5520
5521 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5522 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5523
5524 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5525 contents, rel->r_offset, value,
5526 rel->r_addend);
5527 }
5528
5529 case R_ARM_TLS_GD32:
5530 case R_ARM_TLS_IE32:
5531 {
5532 bfd_vma off;
5533 int indx;
5534 char tls_type;
5535
5536 if (globals->sgot == NULL)
5537 abort ();
5538
5539 indx = 0;
5540 if (h != NULL)
5541 {
5542 bfd_boolean dyn;
5543 dyn = globals->root.dynamic_sections_created;
5544 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5545 && (!info->shared
5546 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5547 {
5548 *unresolved_reloc_p = FALSE;
5549 indx = h->dynindx;
5550 }
5551 off = h->got.offset;
5552 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
5553 }
5554 else
5555 {
5556 if (local_got_offsets == NULL)
5557 abort ();
5558 off = local_got_offsets[r_symndx];
5559 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
5560 }
5561
5562 if (tls_type == GOT_UNKNOWN)
5563 abort ();
5564
5565 if ((off & 1) != 0)
5566 off &= ~1;
5567 else
5568 {
5569 bfd_boolean need_relocs = FALSE;
5570 Elf_Internal_Rela outrel;
5571 bfd_byte *loc = NULL;
5572 int cur_off = off;
5573
5574 /* The GOT entries have not been initialized yet. Do it
5575 now, and emit any relocations. If both an IE GOT and a
5576 GD GOT are necessary, we emit the GD first. */
5577
5578 if ((info->shared || indx != 0)
5579 && (h == NULL
5580 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5581 || h->root.type != bfd_link_hash_undefweak))
5582 {
5583 need_relocs = TRUE;
5584 if (globals->srelgot == NULL)
5585 abort ();
5586 loc = globals->srelgot->contents;
5587 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
5588 }
5589
5590 if (tls_type & GOT_TLS_GD)
5591 {
5592 if (need_relocs)
5593 {
5594 outrel.r_addend = 0;
5595 outrel.r_offset = (globals->sgot->output_section->vma
5596 + globals->sgot->output_offset
5597 + cur_off);
5598 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
5599
5600 if (globals->use_rel)
5601 bfd_put_32 (output_bfd, outrel.r_addend,
5602 globals->sgot->contents + cur_off);
5603
5604 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5605 globals->srelgot->reloc_count++;
5606 loc += RELOC_SIZE (globals);
5607
5608 if (indx == 0)
5609 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5610 globals->sgot->contents + cur_off + 4);
5611 else
5612 {
5613 outrel.r_addend = 0;
5614 outrel.r_info = ELF32_R_INFO (indx,
5615 R_ARM_TLS_DTPOFF32);
5616 outrel.r_offset += 4;
5617
5618 if (globals->use_rel)
5619 bfd_put_32 (output_bfd, outrel.r_addend,
5620 globals->sgot->contents + cur_off + 4);
5621
5622
5623 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5624 globals->srelgot->reloc_count++;
5625 loc += RELOC_SIZE (globals);
5626 }
5627 }
5628 else
5629 {
5630 /* If we are not emitting relocations for a
5631 general dynamic reference, then we must be in a
5632 static link or an executable link with the
5633 symbol binding locally. Mark it as belonging
5634 to module 1, the executable. */
5635 bfd_put_32 (output_bfd, 1,
5636 globals->sgot->contents + cur_off);
5637 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5638 globals->sgot->contents + cur_off + 4);
5639 }
5640
5641 cur_off += 8;
5642 }
5643
5644 if (tls_type & GOT_TLS_IE)
5645 {
5646 if (need_relocs)
5647 {
5648 if (indx == 0)
5649 outrel.r_addend = value - dtpoff_base (info);
5650 else
5651 outrel.r_addend = 0;
5652 outrel.r_offset = (globals->sgot->output_section->vma
5653 + globals->sgot->output_offset
5654 + cur_off);
5655 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
5656
5657 if (globals->use_rel)
5658 bfd_put_32 (output_bfd, outrel.r_addend,
5659 globals->sgot->contents + cur_off);
5660
5661 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5662 globals->srelgot->reloc_count++;
5663 loc += RELOC_SIZE (globals);
5664 }
5665 else
5666 bfd_put_32 (output_bfd, tpoff (info, value),
5667 globals->sgot->contents + cur_off);
5668 cur_off += 4;
5669 }
5670
5671 if (h != NULL)
5672 h->got.offset |= 1;
5673 else
5674 local_got_offsets[r_symndx] |= 1;
5675 }
5676
5677 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
5678 off += 8;
5679 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5680 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5681
5682 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5683 contents, rel->r_offset, value,
5684 rel->r_addend);
5685 }
5686
5687 case R_ARM_TLS_LE32:
5688 if (info->shared)
5689 {
5690 (*_bfd_error_handler)
5691 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
5692 input_bfd, input_section,
5693 (long) rel->r_offset, howto->name);
5694 return FALSE;
5695 }
5696 else
5697 value = tpoff (info, value);
5698
5699 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5700 contents, rel->r_offset, value,
5701 rel->r_addend);
5702
5703 case R_ARM_V4BX:
5704 if (globals->fix_v4bx)
5705 {
5706 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5707
5708 /* Ensure that we have a BX instruction. */
5709 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
5710
5711 /* Preserve Rm (lowest four bits) and the condition code
5712 (highest four bits). Other bits encode MOV PC,Rm. */
5713 insn = (insn & 0xf000000f) | 0x01a0f000;
5714
5715 bfd_put_32 (input_bfd, insn, hit_data);
5716 }
5717 return bfd_reloc_ok;
5718
5719 case R_ARM_MOVW_ABS_NC:
5720 case R_ARM_MOVT_ABS:
5721 case R_ARM_MOVW_PREL_NC:
5722 case R_ARM_MOVT_PREL:
5723 /* Until we properly support segment-base-relative addressing then
5724 we assume the segment base to be zero, as for the group relocations.
5725 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
5726 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
5727 case R_ARM_MOVW_BREL_NC:
5728 case R_ARM_MOVW_BREL:
5729 case R_ARM_MOVT_BREL:
5730 {
5731 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5732
5733 if (globals->use_rel)
5734 {
5735 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
5736 signed_addend = (addend ^ 0x10000) - 0x10000;
5737 }
5738
5739 value += signed_addend;
5740
5741 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
5742 value -= (input_section->output_section->vma
5743 + input_section->output_offset + rel->r_offset);
5744
5745 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
5746 return bfd_reloc_overflow;
5747
5748 if (sym_flags == STT_ARM_TFUNC)
5749 value |= 1;
5750
5751 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
5752 || r_type == R_ARM_MOVT_BREL)
5753 value >>= 16;
5754
5755 insn &= 0xfff0f000;
5756 insn |= value & 0xfff;
5757 insn |= (value & 0xf000) << 4;
5758 bfd_put_32 (input_bfd, insn, hit_data);
5759 }
5760 return bfd_reloc_ok;
5761
5762 case R_ARM_THM_MOVW_ABS_NC:
5763 case R_ARM_THM_MOVT_ABS:
5764 case R_ARM_THM_MOVW_PREL_NC:
5765 case R_ARM_THM_MOVT_PREL:
5766 /* Until we properly support segment-base-relative addressing then
5767 we assume the segment base to be zero, as for the above relocations.
5768 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
5769 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
5770 as R_ARM_THM_MOVT_ABS. */
5771 case R_ARM_THM_MOVW_BREL_NC:
5772 case R_ARM_THM_MOVW_BREL:
5773 case R_ARM_THM_MOVT_BREL:
5774 {
5775 bfd_vma insn;
5776
5777 insn = bfd_get_16 (input_bfd, hit_data) << 16;
5778 insn |= bfd_get_16 (input_bfd, hit_data + 2);
5779
5780 if (globals->use_rel)
5781 {
5782 addend = ((insn >> 4) & 0xf000)
5783 | ((insn >> 15) & 0x0800)
5784 | ((insn >> 4) & 0x0700)
5785 | (insn & 0x00ff);
5786 signed_addend = (addend ^ 0x10000) - 0x10000;
5787 }
5788
5789 value += signed_addend;
5790
5791 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
5792 value -= (input_section->output_section->vma
5793 + input_section->output_offset + rel->r_offset);
5794
5795 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
5796 return bfd_reloc_overflow;
5797
5798 if (sym_flags == STT_ARM_TFUNC)
5799 value |= 1;
5800
5801 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
5802 || r_type == R_ARM_THM_MOVT_BREL)
5803 value >>= 16;
5804
5805 insn &= 0xfbf08f00;
5806 insn |= (value & 0xf000) << 4;
5807 insn |= (value & 0x0800) << 15;
5808 insn |= (value & 0x0700) << 4;
5809 insn |= (value & 0x00ff);
5810
5811 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5812 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5813 }
5814 return bfd_reloc_ok;
5815
5816 case R_ARM_ALU_PC_G0_NC:
5817 case R_ARM_ALU_PC_G1_NC:
5818 case R_ARM_ALU_PC_G0:
5819 case R_ARM_ALU_PC_G1:
5820 case R_ARM_ALU_PC_G2:
5821 case R_ARM_ALU_SB_G0_NC:
5822 case R_ARM_ALU_SB_G1_NC:
5823 case R_ARM_ALU_SB_G0:
5824 case R_ARM_ALU_SB_G1:
5825 case R_ARM_ALU_SB_G2:
5826 {
5827 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5828 bfd_vma pc = input_section->output_section->vma
5829 + input_section->output_offset + rel->r_offset;
5830 /* sb should be the origin of the *segment* containing the symbol.
5831 It is not clear how to obtain this OS-dependent value, so we
5832 make an arbitrary choice of zero. */
5833 bfd_vma sb = 0;
5834 bfd_vma residual;
5835 bfd_vma g_n;
5836 bfd_signed_vma signed_value;
5837 int group = 0;
5838
5839 /* Determine which group of bits to select. */
5840 switch (r_type)
5841 {
5842 case R_ARM_ALU_PC_G0_NC:
5843 case R_ARM_ALU_PC_G0:
5844 case R_ARM_ALU_SB_G0_NC:
5845 case R_ARM_ALU_SB_G0:
5846 group = 0;
5847 break;
5848
5849 case R_ARM_ALU_PC_G1_NC:
5850 case R_ARM_ALU_PC_G1:
5851 case R_ARM_ALU_SB_G1_NC:
5852 case R_ARM_ALU_SB_G1:
5853 group = 1;
5854 break;
5855
5856 case R_ARM_ALU_PC_G2:
5857 case R_ARM_ALU_SB_G2:
5858 group = 2;
5859 break;
5860
5861 default:
5862 abort();
5863 }
5864
5865 /* If REL, extract the addend from the insn. If RELA, it will
5866 have already been fetched for us. */
5867 if (globals->use_rel)
5868 {
5869 int negative;
5870 bfd_vma constant = insn & 0xff;
5871 bfd_vma rotation = (insn & 0xf00) >> 8;
5872
5873 if (rotation == 0)
5874 signed_addend = constant;
5875 else
5876 {
5877 /* Compensate for the fact that in the instruction, the
5878 rotation is stored in multiples of 2 bits. */
5879 rotation *= 2;
5880
5881 /* Rotate "constant" right by "rotation" bits. */
5882 signed_addend = (constant >> rotation) |
5883 (constant << (8 * sizeof (bfd_vma) - rotation));
5884 }
5885
5886 /* Determine if the instruction is an ADD or a SUB.
5887 (For REL, this determines the sign of the addend.) */
5888 negative = identify_add_or_sub (insn);
5889 if (negative == 0)
5890 {
5891 (*_bfd_error_handler)
5892 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
5893 input_bfd, input_section,
5894 (long) rel->r_offset, howto->name);
5895 return bfd_reloc_overflow;
5896 }
5897
5898 signed_addend *= negative;
5899 }
5900
5901 /* Compute the value (X) to go in the place. */
5902 if (r_type == R_ARM_ALU_PC_G0_NC
5903 || r_type == R_ARM_ALU_PC_G1_NC
5904 || r_type == R_ARM_ALU_PC_G0
5905 || r_type == R_ARM_ALU_PC_G1
5906 || r_type == R_ARM_ALU_PC_G2)
5907 /* PC relative. */
5908 signed_value = value - pc + signed_addend;
5909 else
5910 /* Section base relative. */
5911 signed_value = value - sb + signed_addend;
5912
5913 /* If the target symbol is a Thumb function, then set the
5914 Thumb bit in the address. */
5915 if (sym_flags == STT_ARM_TFUNC)
5916 signed_value |= 1;
5917
5918 /* Calculate the value of the relevant G_n, in encoded
5919 constant-with-rotation format. */
5920 g_n = calculate_group_reloc_mask (abs (signed_value), group,
5921 &residual);
5922
5923 /* Check for overflow if required. */
5924 if ((r_type == R_ARM_ALU_PC_G0
5925 || r_type == R_ARM_ALU_PC_G1
5926 || r_type == R_ARM_ALU_PC_G2
5927 || r_type == R_ARM_ALU_SB_G0
5928 || r_type == R_ARM_ALU_SB_G1
5929 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
5930 {
5931 (*_bfd_error_handler)
5932 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
5933 input_bfd, input_section,
5934 (long) rel->r_offset, abs (signed_value), howto->name);
5935 return bfd_reloc_overflow;
5936 }
5937
5938 /* Mask out the value and the ADD/SUB part of the opcode; take care
5939 not to destroy the S bit. */
5940 insn &= 0xff1ff000;
5941
5942 /* Set the opcode according to whether the value to go in the
5943 place is negative. */
5944 if (signed_value < 0)
5945 insn |= 1 << 22;
5946 else
5947 insn |= 1 << 23;
5948
5949 /* Encode the offset. */
5950 insn |= g_n;
5951
5952 bfd_put_32 (input_bfd, insn, hit_data);
5953 }
5954 return bfd_reloc_ok;
5955
5956 case R_ARM_LDR_PC_G0:
5957 case R_ARM_LDR_PC_G1:
5958 case R_ARM_LDR_PC_G2:
5959 case R_ARM_LDR_SB_G0:
5960 case R_ARM_LDR_SB_G1:
5961 case R_ARM_LDR_SB_G2:
5962 {
5963 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5964 bfd_vma pc = input_section->output_section->vma
5965 + input_section->output_offset + rel->r_offset;
5966 bfd_vma sb = 0; /* See note above. */
5967 bfd_vma residual;
5968 bfd_signed_vma signed_value;
5969 int group = 0;
5970
5971 /* Determine which groups of bits to calculate. */
5972 switch (r_type)
5973 {
5974 case R_ARM_LDR_PC_G0:
5975 case R_ARM_LDR_SB_G0:
5976 group = 0;
5977 break;
5978
5979 case R_ARM_LDR_PC_G1:
5980 case R_ARM_LDR_SB_G1:
5981 group = 1;
5982 break;
5983
5984 case R_ARM_LDR_PC_G2:
5985 case R_ARM_LDR_SB_G2:
5986 group = 2;
5987 break;
5988
5989 default:
5990 abort();
5991 }
5992
5993 /* If REL, extract the addend from the insn. If RELA, it will
5994 have already been fetched for us. */
5995 if (globals->use_rel)
5996 {
5997 int negative = (insn & (1 << 23)) ? 1 : -1;
5998 signed_addend = negative * (insn & 0xfff);
5999 }
6000
6001 /* Compute the value (X) to go in the place. */
6002 if (r_type == R_ARM_LDR_PC_G0
6003 || r_type == R_ARM_LDR_PC_G1
6004 || r_type == R_ARM_LDR_PC_G2)
6005 /* PC relative. */
6006 signed_value = value - pc + signed_addend;
6007 else
6008 /* Section base relative. */
6009 signed_value = value - sb + signed_addend;
6010
6011 /* Calculate the value of the relevant G_{n-1} to obtain
6012 the residual at that stage. */
6013 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6014
6015 /* Check for overflow. */
6016 if (residual >= 0x1000)
6017 {
6018 (*_bfd_error_handler)
6019 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6020 input_bfd, input_section,
6021 (long) rel->r_offset, abs (signed_value), howto->name);
6022 return bfd_reloc_overflow;
6023 }
6024
6025 /* Mask out the value and U bit. */
6026 insn &= 0xff7ff000;
6027
6028 /* Set the U bit if the value to go in the place is non-negative. */
6029 if (signed_value >= 0)
6030 insn |= 1 << 23;
6031
6032 /* Encode the offset. */
6033 insn |= residual;
6034
6035 bfd_put_32 (input_bfd, insn, hit_data);
6036 }
6037 return bfd_reloc_ok;
6038
6039 case R_ARM_LDRS_PC_G0:
6040 case R_ARM_LDRS_PC_G1:
6041 case R_ARM_LDRS_PC_G2:
6042 case R_ARM_LDRS_SB_G0:
6043 case R_ARM_LDRS_SB_G1:
6044 case R_ARM_LDRS_SB_G2:
6045 {
6046 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6047 bfd_vma pc = input_section->output_section->vma
6048 + input_section->output_offset + rel->r_offset;
6049 bfd_vma sb = 0; /* See note above. */
6050 bfd_vma residual;
6051 bfd_signed_vma signed_value;
6052 int group = 0;
6053
6054 /* Determine which groups of bits to calculate. */
6055 switch (r_type)
6056 {
6057 case R_ARM_LDRS_PC_G0:
6058 case R_ARM_LDRS_SB_G0:
6059 group = 0;
6060 break;
6061
6062 case R_ARM_LDRS_PC_G1:
6063 case R_ARM_LDRS_SB_G1:
6064 group = 1;
6065 break;
6066
6067 case R_ARM_LDRS_PC_G2:
6068 case R_ARM_LDRS_SB_G2:
6069 group = 2;
6070 break;
6071
6072 default:
6073 abort();
6074 }
6075
6076 /* If REL, extract the addend from the insn. If RELA, it will
6077 have already been fetched for us. */
6078 if (globals->use_rel)
6079 {
6080 int negative = (insn & (1 << 23)) ? 1 : -1;
6081 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
6082 }
6083
6084 /* Compute the value (X) to go in the place. */
6085 if (r_type == R_ARM_LDRS_PC_G0
6086 || r_type == R_ARM_LDRS_PC_G1
6087 || r_type == R_ARM_LDRS_PC_G2)
6088 /* PC relative. */
6089 signed_value = value - pc + signed_addend;
6090 else
6091 /* Section base relative. */
6092 signed_value = value - sb + signed_addend;
6093
6094 /* Calculate the value of the relevant G_{n-1} to obtain
6095 the residual at that stage. */
6096 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6097
6098 /* Check for overflow. */
6099 if (residual >= 0x100)
6100 {
6101 (*_bfd_error_handler)
6102 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6103 input_bfd, input_section,
6104 (long) rel->r_offset, abs (signed_value), howto->name);
6105 return bfd_reloc_overflow;
6106 }
6107
6108 /* Mask out the value and U bit. */
6109 insn &= 0xff7ff0f0;
6110
6111 /* Set the U bit if the value to go in the place is non-negative. */
6112 if (signed_value >= 0)
6113 insn |= 1 << 23;
6114
6115 /* Encode the offset. */
6116 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
6117
6118 bfd_put_32 (input_bfd, insn, hit_data);
6119 }
6120 return bfd_reloc_ok;
6121
6122 case R_ARM_LDC_PC_G0:
6123 case R_ARM_LDC_PC_G1:
6124 case R_ARM_LDC_PC_G2:
6125 case R_ARM_LDC_SB_G0:
6126 case R_ARM_LDC_SB_G1:
6127 case R_ARM_LDC_SB_G2:
6128 {
6129 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6130 bfd_vma pc = input_section->output_section->vma
6131 + input_section->output_offset + rel->r_offset;
6132 bfd_vma sb = 0; /* See note above. */
6133 bfd_vma residual;
6134 bfd_signed_vma signed_value;
6135 int group = 0;
6136
6137 /* Determine which groups of bits to calculate. */
6138 switch (r_type)
6139 {
6140 case R_ARM_LDC_PC_G0:
6141 case R_ARM_LDC_SB_G0:
6142 group = 0;
6143 break;
6144
6145 case R_ARM_LDC_PC_G1:
6146 case R_ARM_LDC_SB_G1:
6147 group = 1;
6148 break;
6149
6150 case R_ARM_LDC_PC_G2:
6151 case R_ARM_LDC_SB_G2:
6152 group = 2;
6153 break;
6154
6155 default:
6156 abort();
6157 }
6158
6159 /* If REL, extract the addend from the insn. If RELA, it will
6160 have already been fetched for us. */
6161 if (globals->use_rel)
6162 {
6163 int negative = (insn & (1 << 23)) ? 1 : -1;
6164 signed_addend = negative * ((insn & 0xff) << 2);
6165 }
6166
6167 /* Compute the value (X) to go in the place. */
6168 if (r_type == R_ARM_LDC_PC_G0
6169 || r_type == R_ARM_LDC_PC_G1
6170 || r_type == R_ARM_LDC_PC_G2)
6171 /* PC relative. */
6172 signed_value = value - pc + signed_addend;
6173 else
6174 /* Section base relative. */
6175 signed_value = value - sb + signed_addend;
6176
6177 /* Calculate the value of the relevant G_{n-1} to obtain
6178 the residual at that stage. */
6179 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6180
6181 /* Check for overflow. (The absolute value to go in the place must be
6182 divisible by four and, after having been divided by four, must
6183 fit in eight bits.) */
6184 if ((residual & 0x3) != 0 || residual >= 0x400)
6185 {
6186 (*_bfd_error_handler)
6187 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6188 input_bfd, input_section,
6189 (long) rel->r_offset, abs (signed_value), howto->name);
6190 return bfd_reloc_overflow;
6191 }
6192
6193 /* Mask out the value and U bit. */
6194 insn &= 0xff7fff00;
6195
6196 /* Set the U bit if the value to go in the place is non-negative. */
6197 if (signed_value >= 0)
6198 insn |= 1 << 23;
6199
6200 /* Encode the offset. */
6201 insn |= residual >> 2;
6202
6203 bfd_put_32 (input_bfd, insn, hit_data);
6204 }
6205 return bfd_reloc_ok;
6206
6207 default:
6208 return bfd_reloc_notsupported;
6209 }
6210 }
6211
6212 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
6213 static void
6214 arm_add_to_rel (bfd * abfd,
6215 bfd_byte * address,
6216 reloc_howto_type * howto,
6217 bfd_signed_vma increment)
6218 {
6219 bfd_signed_vma addend;
6220
6221 if (howto->type == R_ARM_THM_CALL
6222 || howto->type == R_ARM_THM_JUMP24)
6223 {
6224 int upper_insn, lower_insn;
6225 int upper, lower;
6226
6227 upper_insn = bfd_get_16 (abfd, address);
6228 lower_insn = bfd_get_16 (abfd, address + 2);
6229 upper = upper_insn & 0x7ff;
6230 lower = lower_insn & 0x7ff;
6231
6232 addend = (upper << 12) | (lower << 1);
6233 addend += increment;
6234 addend >>= 1;
6235
6236 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
6237 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
6238
6239 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
6240 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
6241 }
6242 else
6243 {
6244 bfd_vma contents;
6245
6246 contents = bfd_get_32 (abfd, address);
6247
6248 /* Get the (signed) value from the instruction. */
6249 addend = contents & howto->src_mask;
6250 if (addend & ((howto->src_mask + 1) >> 1))
6251 {
6252 bfd_signed_vma mask;
6253
6254 mask = -1;
6255 mask &= ~ howto->src_mask;
6256 addend |= mask;
6257 }
6258
6259 /* Add in the increment, (which is a byte value). */
6260 switch (howto->type)
6261 {
6262 default:
6263 addend += increment;
6264 break;
6265
6266 case R_ARM_PC24:
6267 case R_ARM_PLT32:
6268 case R_ARM_CALL:
6269 case R_ARM_JUMP24:
6270 addend <<= howto->size;
6271 addend += increment;
6272
6273 /* Should we check for overflow here ? */
6274
6275 /* Drop any undesired bits. */
6276 addend >>= howto->rightshift;
6277 break;
6278 }
6279
6280 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
6281
6282 bfd_put_32 (abfd, contents, address);
6283 }
6284 }
6285
6286 #define IS_ARM_TLS_RELOC(R_TYPE) \
6287 ((R_TYPE) == R_ARM_TLS_GD32 \
6288 || (R_TYPE) == R_ARM_TLS_LDO32 \
6289 || (R_TYPE) == R_ARM_TLS_LDM32 \
6290 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
6291 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
6292 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
6293 || (R_TYPE) == R_ARM_TLS_LE32 \
6294 || (R_TYPE) == R_ARM_TLS_IE32)
6295
6296 /* Relocate an ARM ELF section. */
6297 static bfd_boolean
6298 elf32_arm_relocate_section (bfd * output_bfd,
6299 struct bfd_link_info * info,
6300 bfd * input_bfd,
6301 asection * input_section,
6302 bfd_byte * contents,
6303 Elf_Internal_Rela * relocs,
6304 Elf_Internal_Sym * local_syms,
6305 asection ** local_sections)
6306 {
6307 Elf_Internal_Shdr *symtab_hdr;
6308 struct elf_link_hash_entry **sym_hashes;
6309 Elf_Internal_Rela *rel;
6310 Elf_Internal_Rela *relend;
6311 const char *name;
6312 struct elf32_arm_link_hash_table * globals;
6313
6314 globals = elf32_arm_hash_table (info);
6315
6316 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
6317 sym_hashes = elf_sym_hashes (input_bfd);
6318
6319 rel = relocs;
6320 relend = relocs + input_section->reloc_count;
6321 for (; rel < relend; rel++)
6322 {
6323 int r_type;
6324 reloc_howto_type * howto;
6325 unsigned long r_symndx;
6326 Elf_Internal_Sym * sym;
6327 asection * sec;
6328 struct elf_link_hash_entry * h;
6329 bfd_vma relocation;
6330 bfd_reloc_status_type r;
6331 arelent bfd_reloc;
6332 char sym_type;
6333 bfd_boolean unresolved_reloc = FALSE;
6334 char *error_message = NULL;
6335
6336 r_symndx = ELF32_R_SYM (rel->r_info);
6337 r_type = ELF32_R_TYPE (rel->r_info);
6338 r_type = arm_real_reloc_type (globals, r_type);
6339
6340 if ( r_type == R_ARM_GNU_VTENTRY
6341 || r_type == R_ARM_GNU_VTINHERIT)
6342 continue;
6343
6344 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
6345 howto = bfd_reloc.howto;
6346
6347 h = NULL;
6348 sym = NULL;
6349 sec = NULL;
6350
6351 if (r_symndx < symtab_hdr->sh_info)
6352 {
6353 sym = local_syms + r_symndx;
6354 sym_type = ELF32_ST_TYPE (sym->st_info);
6355 sec = local_sections[r_symndx];
6356 if (globals->use_rel)
6357 {
6358 relocation = (sec->output_section->vma
6359 + sec->output_offset
6360 + sym->st_value);
6361 if (!info->relocatable
6362 && (sec->flags & SEC_MERGE)
6363 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6364 {
6365 asection *msec;
6366 bfd_vma addend, value;
6367
6368 if (howto->rightshift)
6369 {
6370 (*_bfd_error_handler)
6371 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
6372 input_bfd, input_section,
6373 (long) rel->r_offset, howto->name);
6374 return FALSE;
6375 }
6376
6377 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
6378
6379 /* Get the (signed) value from the instruction. */
6380 addend = value & howto->src_mask;
6381 if (addend & ((howto->src_mask + 1) >> 1))
6382 {
6383 bfd_signed_vma mask;
6384
6385 mask = -1;
6386 mask &= ~ howto->src_mask;
6387 addend |= mask;
6388 }
6389 msec = sec;
6390 addend =
6391 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
6392 - relocation;
6393 addend += msec->output_section->vma + msec->output_offset;
6394 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
6395 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
6396 }
6397 }
6398 else
6399 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6400 }
6401 else
6402 {
6403 bfd_boolean warned;
6404
6405 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6406 r_symndx, symtab_hdr, sym_hashes,
6407 h, sec, relocation,
6408 unresolved_reloc, warned);
6409
6410 sym_type = h->type;
6411 }
6412
6413 if (sec != NULL && elf_discarded_section (sec))
6414 {
6415 /* For relocs against symbols from removed linkonce sections,
6416 or sections discarded by a linker script, we just want the
6417 section contents zeroed. Avoid any special processing. */
6418 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6419 rel->r_info = 0;
6420 rel->r_addend = 0;
6421 continue;
6422 }
6423
6424 if (info->relocatable)
6425 {
6426 /* This is a relocatable link. We don't have to change
6427 anything, unless the reloc is against a section symbol,
6428 in which case we have to adjust according to where the
6429 section symbol winds up in the output section. */
6430 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6431 {
6432 if (globals->use_rel)
6433 arm_add_to_rel (input_bfd, contents + rel->r_offset,
6434 howto, (bfd_signed_vma) sec->output_offset);
6435 else
6436 rel->r_addend += sec->output_offset;
6437 }
6438 continue;
6439 }
6440
6441 if (h != NULL)
6442 name = h->root.root.string;
6443 else
6444 {
6445 name = (bfd_elf_string_from_elf_section
6446 (input_bfd, symtab_hdr->sh_link, sym->st_name));
6447 if (name == NULL || *name == '\0')
6448 name = bfd_section_name (input_bfd, sec);
6449 }
6450
6451 if (r_symndx != 0
6452 && r_type != R_ARM_NONE
6453 && (h == NULL
6454 || h->root.type == bfd_link_hash_defined
6455 || h->root.type == bfd_link_hash_defweak)
6456 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
6457 {
6458 (*_bfd_error_handler)
6459 ((sym_type == STT_TLS
6460 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
6461 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
6462 input_bfd,
6463 input_section,
6464 (long) rel->r_offset,
6465 howto->name,
6466 name);
6467 }
6468
6469 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
6470 input_section, contents, rel,
6471 relocation, info, sec, name,
6472 (h ? ELF_ST_TYPE (h->type) :
6473 ELF_ST_TYPE (sym->st_info)), h,
6474 &unresolved_reloc, &error_message);
6475
6476 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6477 because such sections are not SEC_ALLOC and thus ld.so will
6478 not process them. */
6479 if (unresolved_reloc
6480 && !((input_section->flags & SEC_DEBUGGING) != 0
6481 && h->def_dynamic))
6482 {
6483 (*_bfd_error_handler)
6484 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6485 input_bfd,
6486 input_section,
6487 (long) rel->r_offset,
6488 howto->name,
6489 h->root.root.string);
6490 return FALSE;
6491 }
6492
6493 if (r != bfd_reloc_ok)
6494 {
6495 switch (r)
6496 {
6497 case bfd_reloc_overflow:
6498 /* If the overflowing reloc was to an undefined symbol,
6499 we have already printed one error message and there
6500 is no point complaining again. */
6501 if ((! h ||
6502 h->root.type != bfd_link_hash_undefined)
6503 && (!((*info->callbacks->reloc_overflow)
6504 (info, (h ? &h->root : NULL), name, howto->name,
6505 (bfd_vma) 0, input_bfd, input_section,
6506 rel->r_offset))))
6507 return FALSE;
6508 break;
6509
6510 case bfd_reloc_undefined:
6511 if (!((*info->callbacks->undefined_symbol)
6512 (info, name, input_bfd, input_section,
6513 rel->r_offset, TRUE)))
6514 return FALSE;
6515 break;
6516
6517 case bfd_reloc_outofrange:
6518 error_message = _("out of range");
6519 goto common_error;
6520
6521 case bfd_reloc_notsupported:
6522 error_message = _("unsupported relocation");
6523 goto common_error;
6524
6525 case bfd_reloc_dangerous:
6526 /* error_message should already be set. */
6527 goto common_error;
6528
6529 default:
6530 error_message = _("unknown error");
6531 /* fall through */
6532
6533 common_error:
6534 BFD_ASSERT (error_message != NULL);
6535 if (!((*info->callbacks->reloc_dangerous)
6536 (info, error_message, input_bfd, input_section,
6537 rel->r_offset)))
6538 return FALSE;
6539 break;
6540 }
6541 }
6542 }
6543
6544 return TRUE;
6545 }
6546
6547 /* Set the right machine number. */
6548
6549 static bfd_boolean
6550 elf32_arm_object_p (bfd *abfd)
6551 {
6552 unsigned int mach;
6553
6554 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
6555
6556 if (mach != bfd_mach_arm_unknown)
6557 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6558
6559 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
6560 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
6561
6562 else
6563 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6564
6565 return TRUE;
6566 }
6567
6568 /* Function to keep ARM specific flags in the ELF header. */
6569
6570 static bfd_boolean
6571 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
6572 {
6573 if (elf_flags_init (abfd)
6574 && elf_elfheader (abfd)->e_flags != flags)
6575 {
6576 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
6577 {
6578 if (flags & EF_ARM_INTERWORK)
6579 (*_bfd_error_handler)
6580 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
6581 abfd);
6582 else
6583 _bfd_error_handler
6584 (_("Warning: Clearing the interworking flag of %B due to outside request"),
6585 abfd);
6586 }
6587 }
6588 else
6589 {
6590 elf_elfheader (abfd)->e_flags = flags;
6591 elf_flags_init (abfd) = TRUE;
6592 }
6593
6594 return TRUE;
6595 }
6596
6597 /* Copy backend specific data from one object module to another. */
6598
6599 static bfd_boolean
6600 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6601 {
6602 flagword in_flags;
6603 flagword out_flags;
6604
6605 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6606 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6607 return TRUE;
6608
6609 in_flags = elf_elfheader (ibfd)->e_flags;
6610 out_flags = elf_elfheader (obfd)->e_flags;
6611
6612 if (elf_flags_init (obfd)
6613 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
6614 && in_flags != out_flags)
6615 {
6616 /* Cannot mix APCS26 and APCS32 code. */
6617 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
6618 return FALSE;
6619
6620 /* Cannot mix float APCS and non-float APCS code. */
6621 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
6622 return FALSE;
6623
6624 /* If the src and dest have different interworking flags
6625 then turn off the interworking bit. */
6626 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
6627 {
6628 if (out_flags & EF_ARM_INTERWORK)
6629 _bfd_error_handler
6630 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
6631 obfd, ibfd);
6632
6633 in_flags &= ~EF_ARM_INTERWORK;
6634 }
6635
6636 /* Likewise for PIC, though don't warn for this case. */
6637 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
6638 in_flags &= ~EF_ARM_PIC;
6639 }
6640
6641 elf_elfheader (obfd)->e_flags = in_flags;
6642 elf_flags_init (obfd) = TRUE;
6643
6644 /* Also copy the EI_OSABI field. */
6645 elf_elfheader (obfd)->e_ident[EI_OSABI] =
6646 elf_elfheader (ibfd)->e_ident[EI_OSABI];
6647
6648 /* Copy object attributes. */
6649 _bfd_elf_copy_obj_attributes (ibfd, obfd);
6650
6651 return TRUE;
6652 }
6653
6654 /* Values for Tag_ABI_PCS_R9_use. */
6655 enum
6656 {
6657 AEABI_R9_V6,
6658 AEABI_R9_SB,
6659 AEABI_R9_TLS,
6660 AEABI_R9_unused
6661 };
6662
6663 /* Values for Tag_ABI_PCS_RW_data. */
6664 enum
6665 {
6666 AEABI_PCS_RW_data_absolute,
6667 AEABI_PCS_RW_data_PCrel,
6668 AEABI_PCS_RW_data_SBrel,
6669 AEABI_PCS_RW_data_unused
6670 };
6671
6672 /* Values for Tag_ABI_enum_size. */
6673 enum
6674 {
6675 AEABI_enum_unused,
6676 AEABI_enum_short,
6677 AEABI_enum_wide,
6678 AEABI_enum_forced_wide
6679 };
6680
6681 /* Determine whether an object attribute tag takes an integer, a
6682 string or both. */
6683 static int
6684 elf32_arm_obj_attrs_arg_type (int tag)
6685 {
6686 if (tag == Tag_compatibility)
6687 return 3;
6688 else if (tag == 4 || tag == 5)
6689 return 2;
6690 else if (tag < 32)
6691 return 1;
6692 else
6693 return (tag & 1) != 0 ? 2 : 1;
6694 }
6695
6696 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
6697 are conflicting attributes. */
6698 static bfd_boolean
6699 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
6700 {
6701 obj_attribute *in_attr;
6702 obj_attribute *out_attr;
6703 obj_attribute_list *in_list;
6704 /* Some tags have 0 = don't care, 1 = strong requirement,
6705 2 = weak requirement. */
6706 static const int order_312[3] = {3, 1, 2};
6707 int i;
6708
6709 if (!elf_known_obj_attributes_proc (obfd)[0].i)
6710 {
6711 /* This is the first object. Copy the attributes. */
6712 _bfd_elf_copy_obj_attributes (ibfd, obfd);
6713
6714 /* Use the Tag_null value to indicate the attributes have been
6715 initialized. */
6716 elf_known_obj_attributes_proc (obfd)[0].i = 1;
6717
6718 return TRUE;
6719 }
6720
6721 in_attr = elf_known_obj_attributes_proc (ibfd);
6722 out_attr = elf_known_obj_attributes_proc (obfd);
6723 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
6724 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
6725 {
6726 /* Ignore mismatches if teh object doesn't use floating point. */
6727 if (out_attr[Tag_ABI_FP_number_model].i == 0)
6728 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
6729 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
6730 {
6731 _bfd_error_handler
6732 (_("ERROR: %B uses VFP register arguments, %B does not"),
6733 ibfd, obfd);
6734 return FALSE;
6735 }
6736 }
6737
6738 for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
6739 {
6740 /* Merge this attribute with existing attributes. */
6741 switch (i)
6742 {
6743 case Tag_CPU_raw_name:
6744 case Tag_CPU_name:
6745 /* Use whichever has the greatest architecture requirements. We
6746 won't necessarily have both the above tags, so make sure input
6747 name is non-NULL. */
6748 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i
6749 && in_attr[i].s)
6750 out_attr[i].s = _bfd_elf_attr_strdup (obfd, in_attr[i].s);
6751 break;
6752
6753 case Tag_ABI_optimization_goals:
6754 case Tag_ABI_FP_optimization_goals:
6755 /* Use the first value seen. */
6756 break;
6757
6758 case Tag_CPU_arch:
6759 case Tag_ARM_ISA_use:
6760 case Tag_THUMB_ISA_use:
6761 case Tag_VFP_arch:
6762 case Tag_WMMX_arch:
6763 case Tag_NEON_arch:
6764 /* ??? Do NEON and WMMX conflict? */
6765 case Tag_ABI_FP_rounding:
6766 case Tag_ABI_FP_denormal:
6767 case Tag_ABI_FP_exceptions:
6768 case Tag_ABI_FP_user_exceptions:
6769 case Tag_ABI_FP_number_model:
6770 case Tag_ABI_align8_preserved:
6771 case Tag_ABI_HardFP_use:
6772 /* Use the largest value specified. */
6773 if (in_attr[i].i > out_attr[i].i)
6774 out_attr[i].i = in_attr[i].i;
6775 break;
6776
6777 case Tag_CPU_arch_profile:
6778 /* Warn if conflicting architecture profiles used. */
6779 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
6780 {
6781 _bfd_error_handler
6782 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
6783 ibfd, in_attr[i].i, out_attr[i].i);
6784 return FALSE;
6785 }
6786 if (in_attr[i].i)
6787 out_attr[i].i = in_attr[i].i;
6788 break;
6789 case Tag_PCS_config:
6790 if (out_attr[i].i == 0)
6791 out_attr[i].i = in_attr[i].i;
6792 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
6793 {
6794 /* It's sometimes ok to mix different configs, so this is only
6795 a warning. */
6796 _bfd_error_handler
6797 (_("Warning: %B: Conflicting platform configuration"), ibfd);
6798 }
6799 break;
6800 case Tag_ABI_PCS_R9_use:
6801 if (in_attr[i].i != out_attr[i].i
6802 && out_attr[i].i != AEABI_R9_unused
6803 && in_attr[i].i != AEABI_R9_unused)
6804 {
6805 _bfd_error_handler
6806 (_("ERROR: %B: Conflicting use of R9"), ibfd);
6807 return FALSE;
6808 }
6809 if (out_attr[i].i == AEABI_R9_unused)
6810 out_attr[i].i = in_attr[i].i;
6811 break;
6812 case Tag_ABI_PCS_RW_data:
6813 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
6814 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
6815 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
6816 {
6817 _bfd_error_handler
6818 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
6819 ibfd);
6820 return FALSE;
6821 }
6822 /* Use the smallest value specified. */
6823 if (in_attr[i].i < out_attr[i].i)
6824 out_attr[i].i = in_attr[i].i;
6825 break;
6826 case Tag_ABI_PCS_RO_data:
6827 /* Use the smallest value specified. */
6828 if (in_attr[i].i < out_attr[i].i)
6829 out_attr[i].i = in_attr[i].i;
6830 break;
6831 case Tag_ABI_PCS_GOT_use:
6832 if (in_attr[i].i > 2 || out_attr[i].i > 2
6833 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
6834 out_attr[i].i = in_attr[i].i;
6835 break;
6836 case Tag_ABI_PCS_wchar_t:
6837 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
6838 {
6839 _bfd_error_handler
6840 (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
6841 return FALSE;
6842 }
6843 if (in_attr[i].i)
6844 out_attr[i].i = in_attr[i].i;
6845 break;
6846 case Tag_ABI_align8_needed:
6847 /* ??? Check against Tag_ABI_align8_preserved. */
6848 if (in_attr[i].i > 2 || out_attr[i].i > 2
6849 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
6850 out_attr[i].i = in_attr[i].i;
6851 break;
6852 case Tag_ABI_enum_size:
6853 if (in_attr[i].i != AEABI_enum_unused)
6854 {
6855 if (out_attr[i].i == AEABI_enum_unused
6856 || out_attr[i].i == AEABI_enum_forced_wide)
6857 {
6858 /* The existing object is compatible with anything.
6859 Use whatever requirements the new object has. */
6860 out_attr[i].i = in_attr[i].i;
6861 }
6862 else if (in_attr[i].i != AEABI_enum_forced_wide
6863 && out_attr[i].i != in_attr[i].i
6864 && !elf32_arm_tdata (obfd)->no_enum_size_warning)
6865 {
6866 const char *aeabi_enum_names[] =
6867 { "", "variable-size", "32-bit", "" };
6868 _bfd_error_handler
6869 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
6870 ibfd, aeabi_enum_names[in_attr[i].i],
6871 aeabi_enum_names[out_attr[i].i]);
6872 }
6873 }
6874 break;
6875 case Tag_ABI_VFP_args:
6876 /* Aready done. */
6877 break;
6878 case Tag_ABI_WMMX_args:
6879 if (in_attr[i].i != out_attr[i].i)
6880 {
6881 _bfd_error_handler
6882 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
6883 ibfd, obfd);
6884 return FALSE;
6885 }
6886 break;
6887 default: /* All known attributes should be explicitly covered. */
6888 abort ();
6889 }
6890
6891 if (in_attr[i].type && !out_attr[i].type)
6892 switch (in_attr[i].type)
6893 {
6894 case 1:
6895 if (out_attr[i].i)
6896 out_attr[i].type = 1;
6897 break;
6898
6899 case 2:
6900 if (out_attr[i].s)
6901 out_attr[i].type = 2;
6902 break;
6903
6904 default:
6905 abort ();
6906 }
6907 }
6908
6909 /* Merge Tag_compatibility attributes and any common GNU ones. */
6910 _bfd_elf_merge_object_attributes (ibfd, obfd);
6911
6912 /* Check for any attributes not known on ARM. */
6913 in_list = elf_other_obj_attributes_proc (ibfd);
6914 while (in_list && in_list->tag == Tag_compatibility)
6915 in_list = in_list->next;
6916
6917 for (; in_list; in_list = in_list->next)
6918 {
6919 if ((in_list->tag & 128) < 64)
6920 {
6921 _bfd_error_handler
6922 (_("Warning: %B: Unknown EABI object attribute %d"),
6923 ibfd, in_list->tag);
6924 break;
6925 }
6926 }
6927 return TRUE;
6928 }
6929
6930
6931 /* Return TRUE if the two EABI versions are incompatible. */
6932
6933 static bfd_boolean
6934 elf32_arm_versions_compatible (unsigned iver, unsigned over)
6935 {
6936 /* v4 and v5 are the same spec before and after it was released,
6937 so allow mixing them. */
6938 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
6939 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
6940 return TRUE;
6941
6942 return (iver == over);
6943 }
6944
6945 /* Merge backend specific data from an object file to the output
6946 object file when linking. */
6947
6948 static bfd_boolean
6949 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
6950 {
6951 flagword out_flags;
6952 flagword in_flags;
6953 bfd_boolean flags_compatible = TRUE;
6954 asection *sec;
6955
6956 /* Check if we have the same endianess. */
6957 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
6958 return FALSE;
6959
6960 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6961 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6962 return TRUE;
6963
6964 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
6965 return FALSE;
6966
6967 /* The input BFD must have had its flags initialised. */
6968 /* The following seems bogus to me -- The flags are initialized in
6969 the assembler but I don't think an elf_flags_init field is
6970 written into the object. */
6971 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6972
6973 in_flags = elf_elfheader (ibfd)->e_flags;
6974 out_flags = elf_elfheader (obfd)->e_flags;
6975
6976 if (!elf_flags_init (obfd))
6977 {
6978 /* If the input is the default architecture and had the default
6979 flags then do not bother setting the flags for the output
6980 architecture, instead allow future merges to do this. If no
6981 future merges ever set these flags then they will retain their
6982 uninitialised values, which surprise surprise, correspond
6983 to the default values. */
6984 if (bfd_get_arch_info (ibfd)->the_default
6985 && elf_elfheader (ibfd)->e_flags == 0)
6986 return TRUE;
6987
6988 elf_flags_init (obfd) = TRUE;
6989 elf_elfheader (obfd)->e_flags = in_flags;
6990
6991 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
6992 && bfd_get_arch_info (obfd)->the_default)
6993 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
6994
6995 return TRUE;
6996 }
6997
6998 /* Determine what should happen if the input ARM architecture
6999 does not match the output ARM architecture. */
7000 if (! bfd_arm_merge_machines (ibfd, obfd))
7001 return FALSE;
7002
7003 /* Identical flags must be compatible. */
7004 if (in_flags == out_flags)
7005 return TRUE;
7006
7007 /* Check to see if the input BFD actually contains any sections. If
7008 not, its flags may not have been initialised either, but it
7009 cannot actually cause any incompatiblity. Do not short-circuit
7010 dynamic objects; their section list may be emptied by
7011 elf_link_add_object_symbols.
7012
7013 Also check to see if there are no code sections in the input.
7014 In this case there is no need to check for code specific flags.
7015 XXX - do we need to worry about floating-point format compatability
7016 in data sections ? */
7017 if (!(ibfd->flags & DYNAMIC))
7018 {
7019 bfd_boolean null_input_bfd = TRUE;
7020 bfd_boolean only_data_sections = TRUE;
7021
7022 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7023 {
7024 /* Ignore synthetic glue sections. */
7025 if (strcmp (sec->name, ".glue_7")
7026 && strcmp (sec->name, ".glue_7t"))
7027 {
7028 if ((bfd_get_section_flags (ibfd, sec)
7029 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7030 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7031 only_data_sections = FALSE;
7032
7033 null_input_bfd = FALSE;
7034 break;
7035 }
7036 }
7037
7038 if (null_input_bfd || only_data_sections)
7039 return TRUE;
7040 }
7041
7042 /* Complain about various flag mismatches. */
7043 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
7044 EF_ARM_EABI_VERSION (out_flags)))
7045 {
7046 _bfd_error_handler
7047 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
7048 ibfd, obfd,
7049 (in_flags & EF_ARM_EABIMASK) >> 24,
7050 (out_flags & EF_ARM_EABIMASK) >> 24);
7051 return FALSE;
7052 }
7053
7054 /* Not sure what needs to be checked for EABI versions >= 1. */
7055 /* VxWorks libraries do not use these flags. */
7056 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
7057 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
7058 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
7059 {
7060 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
7061 {
7062 _bfd_error_handler
7063 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
7064 ibfd, obfd,
7065 in_flags & EF_ARM_APCS_26 ? 26 : 32,
7066 out_flags & EF_ARM_APCS_26 ? 26 : 32);
7067 flags_compatible = FALSE;
7068 }
7069
7070 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
7071 {
7072 if (in_flags & EF_ARM_APCS_FLOAT)
7073 _bfd_error_handler
7074 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
7075 ibfd, obfd);
7076 else
7077 _bfd_error_handler
7078 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
7079 ibfd, obfd);
7080
7081 flags_compatible = FALSE;
7082 }
7083
7084 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
7085 {
7086 if (in_flags & EF_ARM_VFP_FLOAT)
7087 _bfd_error_handler
7088 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
7089 ibfd, obfd);
7090 else
7091 _bfd_error_handler
7092 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
7093 ibfd, obfd);
7094
7095 flags_compatible = FALSE;
7096 }
7097
7098 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
7099 {
7100 if (in_flags & EF_ARM_MAVERICK_FLOAT)
7101 _bfd_error_handler
7102 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
7103 ibfd, obfd);
7104 else
7105 _bfd_error_handler
7106 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
7107 ibfd, obfd);
7108
7109 flags_compatible = FALSE;
7110 }
7111
7112 #ifdef EF_ARM_SOFT_FLOAT
7113 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
7114 {
7115 /* We can allow interworking between code that is VFP format
7116 layout, and uses either soft float or integer regs for
7117 passing floating point arguments and results. We already
7118 know that the APCS_FLOAT flags match; similarly for VFP
7119 flags. */
7120 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
7121 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
7122 {
7123 if (in_flags & EF_ARM_SOFT_FLOAT)
7124 _bfd_error_handler
7125 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
7126 ibfd, obfd);
7127 else
7128 _bfd_error_handler
7129 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
7130 ibfd, obfd);
7131
7132 flags_compatible = FALSE;
7133 }
7134 }
7135 #endif
7136
7137 /* Interworking mismatch is only a warning. */
7138 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
7139 {
7140 if (in_flags & EF_ARM_INTERWORK)
7141 {
7142 _bfd_error_handler
7143 (_("Warning: %B supports interworking, whereas %B does not"),
7144 ibfd, obfd);
7145 }
7146 else
7147 {
7148 _bfd_error_handler
7149 (_("Warning: %B does not support interworking, whereas %B does"),
7150 ibfd, obfd);
7151 }
7152 }
7153 }
7154
7155 return flags_compatible;
7156 }
7157
7158 /* Display the flags field. */
7159
7160 static bfd_boolean
7161 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
7162 {
7163 FILE * file = (FILE *) ptr;
7164 unsigned long flags;
7165
7166 BFD_ASSERT (abfd != NULL && ptr != NULL);
7167
7168 /* Print normal ELF private data. */
7169 _bfd_elf_print_private_bfd_data (abfd, ptr);
7170
7171 flags = elf_elfheader (abfd)->e_flags;
7172 /* Ignore init flag - it may not be set, despite the flags field
7173 containing valid data. */
7174
7175 /* xgettext:c-format */
7176 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
7177
7178 switch (EF_ARM_EABI_VERSION (flags))
7179 {
7180 case EF_ARM_EABI_UNKNOWN:
7181 /* The following flag bits are GNU extensions and not part of the
7182 official ARM ELF extended ABI. Hence they are only decoded if
7183 the EABI version is not set. */
7184 if (flags & EF_ARM_INTERWORK)
7185 fprintf (file, _(" [interworking enabled]"));
7186
7187 if (flags & EF_ARM_APCS_26)
7188 fprintf (file, " [APCS-26]");
7189 else
7190 fprintf (file, " [APCS-32]");
7191
7192 if (flags & EF_ARM_VFP_FLOAT)
7193 fprintf (file, _(" [VFP float format]"));
7194 else if (flags & EF_ARM_MAVERICK_FLOAT)
7195 fprintf (file, _(" [Maverick float format]"));
7196 else
7197 fprintf (file, _(" [FPA float format]"));
7198
7199 if (flags & EF_ARM_APCS_FLOAT)
7200 fprintf (file, _(" [floats passed in float registers]"));
7201
7202 if (flags & EF_ARM_PIC)
7203 fprintf (file, _(" [position independent]"));
7204
7205 if (flags & EF_ARM_NEW_ABI)
7206 fprintf (file, _(" [new ABI]"));
7207
7208 if (flags & EF_ARM_OLD_ABI)
7209 fprintf (file, _(" [old ABI]"));
7210
7211 if (flags & EF_ARM_SOFT_FLOAT)
7212 fprintf (file, _(" [software FP]"));
7213
7214 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
7215 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
7216 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
7217 | EF_ARM_MAVERICK_FLOAT);
7218 break;
7219
7220 case EF_ARM_EABI_VER1:
7221 fprintf (file, _(" [Version1 EABI]"));
7222
7223 if (flags & EF_ARM_SYMSARESORTED)
7224 fprintf (file, _(" [sorted symbol table]"));
7225 else
7226 fprintf (file, _(" [unsorted symbol table]"));
7227
7228 flags &= ~ EF_ARM_SYMSARESORTED;
7229 break;
7230
7231 case EF_ARM_EABI_VER2:
7232 fprintf (file, _(" [Version2 EABI]"));
7233
7234 if (flags & EF_ARM_SYMSARESORTED)
7235 fprintf (file, _(" [sorted symbol table]"));
7236 else
7237 fprintf (file, _(" [unsorted symbol table]"));
7238
7239 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
7240 fprintf (file, _(" [dynamic symbols use segment index]"));
7241
7242 if (flags & EF_ARM_MAPSYMSFIRST)
7243 fprintf (file, _(" [mapping symbols precede others]"));
7244
7245 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
7246 | EF_ARM_MAPSYMSFIRST);
7247 break;
7248
7249 case EF_ARM_EABI_VER3:
7250 fprintf (file, _(" [Version3 EABI]"));
7251 break;
7252
7253 case EF_ARM_EABI_VER4:
7254 fprintf (file, _(" [Version4 EABI]"));
7255 goto eabi;
7256
7257 case EF_ARM_EABI_VER5:
7258 fprintf (file, _(" [Version5 EABI]"));
7259 eabi:
7260 if (flags & EF_ARM_BE8)
7261 fprintf (file, _(" [BE8]"));
7262
7263 if (flags & EF_ARM_LE8)
7264 fprintf (file, _(" [LE8]"));
7265
7266 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
7267 break;
7268
7269 default:
7270 fprintf (file, _(" <EABI version unrecognised>"));
7271 break;
7272 }
7273
7274 flags &= ~ EF_ARM_EABIMASK;
7275
7276 if (flags & EF_ARM_RELEXEC)
7277 fprintf (file, _(" [relocatable executable]"));
7278
7279 if (flags & EF_ARM_HASENTRY)
7280 fprintf (file, _(" [has entry point]"));
7281
7282 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
7283
7284 if (flags)
7285 fprintf (file, _("<Unrecognised flag bits set>"));
7286
7287 fputc ('\n', file);
7288
7289 return TRUE;
7290 }
7291
7292 static int
7293 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
7294 {
7295 switch (ELF_ST_TYPE (elf_sym->st_info))
7296 {
7297 case STT_ARM_TFUNC:
7298 return ELF_ST_TYPE (elf_sym->st_info);
7299
7300 case STT_ARM_16BIT:
7301 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
7302 This allows us to distinguish between data used by Thumb instructions
7303 and non-data (which is probably code) inside Thumb regions of an
7304 executable. */
7305 if (type != STT_OBJECT && type != STT_TLS)
7306 return ELF_ST_TYPE (elf_sym->st_info);
7307 break;
7308
7309 default:
7310 break;
7311 }
7312
7313 return type;
7314 }
7315
7316 static asection *
7317 elf32_arm_gc_mark_hook (asection *sec,
7318 struct bfd_link_info *info,
7319 Elf_Internal_Rela *rel,
7320 struct elf_link_hash_entry *h,
7321 Elf_Internal_Sym *sym)
7322 {
7323 if (h != NULL)
7324 switch (ELF32_R_TYPE (rel->r_info))
7325 {
7326 case R_ARM_GNU_VTINHERIT:
7327 case R_ARM_GNU_VTENTRY:
7328 return NULL;
7329 }
7330
7331 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
7332 }
7333
7334 /* Update the got entry reference counts for the section being removed. */
7335
7336 static bfd_boolean
7337 elf32_arm_gc_sweep_hook (bfd * abfd,
7338 struct bfd_link_info * info,
7339 asection * sec,
7340 const Elf_Internal_Rela * relocs)
7341 {
7342 Elf_Internal_Shdr *symtab_hdr;
7343 struct elf_link_hash_entry **sym_hashes;
7344 bfd_signed_vma *local_got_refcounts;
7345 const Elf_Internal_Rela *rel, *relend;
7346 struct elf32_arm_link_hash_table * globals;
7347
7348 globals = elf32_arm_hash_table (info);
7349
7350 elf_section_data (sec)->local_dynrel = NULL;
7351
7352 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7353 sym_hashes = elf_sym_hashes (abfd);
7354 local_got_refcounts = elf_local_got_refcounts (abfd);
7355
7356 check_use_blx(globals);
7357
7358 relend = relocs + sec->reloc_count;
7359 for (rel = relocs; rel < relend; rel++)
7360 {
7361 unsigned long r_symndx;
7362 struct elf_link_hash_entry *h = NULL;
7363 int r_type;
7364
7365 r_symndx = ELF32_R_SYM (rel->r_info);
7366 if (r_symndx >= symtab_hdr->sh_info)
7367 {
7368 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7369 while (h->root.type == bfd_link_hash_indirect
7370 || h->root.type == bfd_link_hash_warning)
7371 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7372 }
7373
7374 r_type = ELF32_R_TYPE (rel->r_info);
7375 r_type = arm_real_reloc_type (globals, r_type);
7376 switch (r_type)
7377 {
7378 case R_ARM_GOT32:
7379 case R_ARM_GOT_PREL:
7380 case R_ARM_TLS_GD32:
7381 case R_ARM_TLS_IE32:
7382 if (h != NULL)
7383 {
7384 if (h->got.refcount > 0)
7385 h->got.refcount -= 1;
7386 }
7387 else if (local_got_refcounts != NULL)
7388 {
7389 if (local_got_refcounts[r_symndx] > 0)
7390 local_got_refcounts[r_symndx] -= 1;
7391 }
7392 break;
7393
7394 case R_ARM_TLS_LDM32:
7395 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
7396 break;
7397
7398 case R_ARM_ABS32:
7399 case R_ARM_ABS32_NOI:
7400 case R_ARM_REL32:
7401 case R_ARM_REL32_NOI:
7402 case R_ARM_PC24:
7403 case R_ARM_PLT32:
7404 case R_ARM_CALL:
7405 case R_ARM_JUMP24:
7406 case R_ARM_PREL31:
7407 case R_ARM_THM_CALL:
7408 case R_ARM_THM_JUMP24:
7409 case R_ARM_THM_JUMP19:
7410 case R_ARM_MOVW_ABS_NC:
7411 case R_ARM_MOVT_ABS:
7412 case R_ARM_MOVW_PREL_NC:
7413 case R_ARM_MOVT_PREL:
7414 case R_ARM_THM_MOVW_ABS_NC:
7415 case R_ARM_THM_MOVT_ABS:
7416 case R_ARM_THM_MOVW_PREL_NC:
7417 case R_ARM_THM_MOVT_PREL:
7418 /* Should the interworking branches be here also? */
7419
7420 if (h != NULL)
7421 {
7422 struct elf32_arm_link_hash_entry *eh;
7423 struct elf32_arm_relocs_copied **pp;
7424 struct elf32_arm_relocs_copied *p;
7425
7426 eh = (struct elf32_arm_link_hash_entry *) h;
7427
7428 if (h->plt.refcount > 0)
7429 {
7430 h->plt.refcount -= 1;
7431 if (r_type == R_ARM_THM_CALL)
7432 eh->plt_maybe_thumb_refcount--;
7433
7434 if (r_type == R_ARM_THM_JUMP24
7435 || r_type == R_ARM_THM_JUMP19)
7436 eh->plt_thumb_refcount--;
7437 }
7438
7439 if (r_type == R_ARM_ABS32
7440 || r_type == R_ARM_REL32
7441 || r_type == R_ARM_ABS32_NOI
7442 || r_type == R_ARM_REL32_NOI)
7443 {
7444 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
7445 pp = &p->next)
7446 if (p->section == sec)
7447 {
7448 p->count -= 1;
7449 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
7450 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
7451 p->pc_count -= 1;
7452 if (p->count == 0)
7453 *pp = p->next;
7454 break;
7455 }
7456 }
7457 }
7458 break;
7459
7460 default:
7461 break;
7462 }
7463 }
7464
7465 return TRUE;
7466 }
7467
7468 /* Look through the relocs for a section during the first phase. */
7469
7470 static bfd_boolean
7471 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
7472 asection *sec, const Elf_Internal_Rela *relocs)
7473 {
7474 Elf_Internal_Shdr *symtab_hdr;
7475 struct elf_link_hash_entry **sym_hashes;
7476 const Elf_Internal_Rela *rel;
7477 const Elf_Internal_Rela *rel_end;
7478 bfd *dynobj;
7479 asection *sreloc;
7480 bfd_vma *local_got_offsets;
7481 struct elf32_arm_link_hash_table *htab;
7482
7483 if (info->relocatable)
7484 return TRUE;
7485
7486 htab = elf32_arm_hash_table (info);
7487 sreloc = NULL;
7488
7489 /* Create dynamic sections for relocatable executables so that we can
7490 copy relocations. */
7491 if (htab->root.is_relocatable_executable
7492 && ! htab->root.dynamic_sections_created)
7493 {
7494 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
7495 return FALSE;
7496 }
7497
7498 dynobj = elf_hash_table (info)->dynobj;
7499 local_got_offsets = elf_local_got_offsets (abfd);
7500
7501 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7502 sym_hashes = elf_sym_hashes (abfd);
7503
7504 rel_end = relocs + sec->reloc_count;
7505 for (rel = relocs; rel < rel_end; rel++)
7506 {
7507 struct elf_link_hash_entry *h;
7508 struct elf32_arm_link_hash_entry *eh;
7509 unsigned long r_symndx;
7510 int r_type;
7511
7512 r_symndx = ELF32_R_SYM (rel->r_info);
7513 r_type = ELF32_R_TYPE (rel->r_info);
7514 r_type = arm_real_reloc_type (htab, r_type);
7515
7516 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
7517 {
7518 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
7519 r_symndx);
7520 return FALSE;
7521 }
7522
7523 if (r_symndx < symtab_hdr->sh_info)
7524 h = NULL;
7525 else
7526 {
7527 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7528 while (h->root.type == bfd_link_hash_indirect
7529 || h->root.type == bfd_link_hash_warning)
7530 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7531 }
7532
7533 eh = (struct elf32_arm_link_hash_entry *) h;
7534
7535 switch (r_type)
7536 {
7537 case R_ARM_GOT32:
7538 case R_ARM_GOT_PREL:
7539 case R_ARM_TLS_GD32:
7540 case R_ARM_TLS_IE32:
7541 /* This symbol requires a global offset table entry. */
7542 {
7543 int tls_type, old_tls_type;
7544
7545 switch (r_type)
7546 {
7547 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
7548 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
7549 default: tls_type = GOT_NORMAL; break;
7550 }
7551
7552 if (h != NULL)
7553 {
7554 h->got.refcount++;
7555 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
7556 }
7557 else
7558 {
7559 bfd_signed_vma *local_got_refcounts;
7560
7561 /* This is a global offset table entry for a local symbol. */
7562 local_got_refcounts = elf_local_got_refcounts (abfd);
7563 if (local_got_refcounts == NULL)
7564 {
7565 bfd_size_type size;
7566
7567 size = symtab_hdr->sh_info;
7568 size *= (sizeof (bfd_signed_vma) + sizeof(char));
7569 local_got_refcounts = bfd_zalloc (abfd, size);
7570 if (local_got_refcounts == NULL)
7571 return FALSE;
7572 elf_local_got_refcounts (abfd) = local_got_refcounts;
7573 elf32_arm_local_got_tls_type (abfd)
7574 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
7575 }
7576 local_got_refcounts[r_symndx] += 1;
7577 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
7578 }
7579
7580 /* We will already have issued an error message if there is a
7581 TLS / non-TLS mismatch, based on the symbol type. We don't
7582 support any linker relaxations. So just combine any TLS
7583 types needed. */
7584 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
7585 && tls_type != GOT_NORMAL)
7586 tls_type |= old_tls_type;
7587
7588 if (old_tls_type != tls_type)
7589 {
7590 if (h != NULL)
7591 elf32_arm_hash_entry (h)->tls_type = tls_type;
7592 else
7593 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
7594 }
7595 }
7596 /* Fall through */
7597
7598 case R_ARM_TLS_LDM32:
7599 if (r_type == R_ARM_TLS_LDM32)
7600 htab->tls_ldm_got.refcount++;
7601 /* Fall through */
7602
7603 case R_ARM_GOTOFF32:
7604 case R_ARM_GOTPC:
7605 if (htab->sgot == NULL)
7606 {
7607 if (htab->root.dynobj == NULL)
7608 htab->root.dynobj = abfd;
7609 if (!create_got_section (htab->root.dynobj, info))
7610 return FALSE;
7611 }
7612 break;
7613
7614 case R_ARM_ABS12:
7615 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
7616 ldr __GOTT_INDEX__ offsets. */
7617 if (!htab->vxworks_p)
7618 break;
7619 /* Fall through */
7620
7621 case R_ARM_ABS32:
7622 case R_ARM_ABS32_NOI:
7623 case R_ARM_REL32:
7624 case R_ARM_REL32_NOI:
7625 case R_ARM_PC24:
7626 case R_ARM_PLT32:
7627 case R_ARM_CALL:
7628 case R_ARM_JUMP24:
7629 case R_ARM_PREL31:
7630 case R_ARM_THM_CALL:
7631 case R_ARM_THM_JUMP24:
7632 case R_ARM_THM_JUMP19:
7633 case R_ARM_MOVW_ABS_NC:
7634 case R_ARM_MOVT_ABS:
7635 case R_ARM_MOVW_PREL_NC:
7636 case R_ARM_MOVT_PREL:
7637 case R_ARM_THM_MOVW_ABS_NC:
7638 case R_ARM_THM_MOVT_ABS:
7639 case R_ARM_THM_MOVW_PREL_NC:
7640 case R_ARM_THM_MOVT_PREL:
7641 /* Should the interworking branches be listed here? */
7642 if (h != NULL)
7643 {
7644 /* If this reloc is in a read-only section, we might
7645 need a copy reloc. We can't check reliably at this
7646 stage whether the section is read-only, as input
7647 sections have not yet been mapped to output sections.
7648 Tentatively set the flag for now, and correct in
7649 adjust_dynamic_symbol. */
7650 if (!info->shared)
7651 h->non_got_ref = 1;
7652
7653 /* We may need a .plt entry if the function this reloc
7654 refers to is in a different object. We can't tell for
7655 sure yet, because something later might force the
7656 symbol local. */
7657 if (r_type != R_ARM_ABS32
7658 && r_type != R_ARM_REL32
7659 && r_type != R_ARM_ABS32_NOI
7660 && r_type != R_ARM_REL32_NOI
7661 && r_type != R_ARM_ABS12)
7662 h->needs_plt = 1;
7663
7664 /* If we create a PLT entry, this relocation will reference
7665 it, even if it's an ABS32 relocation. */
7666 h->plt.refcount += 1;
7667
7668 /* It's too early to use htab->use_blx here, so we have to
7669 record possible blx references separately from
7670 relocs that definitely need a thumb stub. */
7671
7672 if (r_type == R_ARM_THM_CALL)
7673 eh->plt_maybe_thumb_refcount += 1;
7674
7675 if (r_type == R_ARM_THM_JUMP24
7676 || r_type == R_ARM_THM_JUMP19)
7677 eh->plt_thumb_refcount += 1;
7678 }
7679
7680 /* If we are creating a shared library or relocatable executable,
7681 and this is a reloc against a global symbol, or a non PC
7682 relative reloc against a local symbol, then we need to copy
7683 the reloc into the shared library. However, if we are linking
7684 with -Bsymbolic, we do not need to copy a reloc against a
7685 global symbol which is defined in an object we are
7686 including in the link (i.e., DEF_REGULAR is set). At
7687 this point we have not seen all the input files, so it is
7688 possible that DEF_REGULAR is not set now but will be set
7689 later (it is never cleared). We account for that
7690 possibility below by storing information in the
7691 relocs_copied field of the hash table entry. */
7692 if ((info->shared || htab->root.is_relocatable_executable)
7693 && (sec->flags & SEC_ALLOC) != 0
7694 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
7695 || (h != NULL && ! h->needs_plt
7696 && (! info->symbolic || ! h->def_regular))))
7697 {
7698 struct elf32_arm_relocs_copied *p, **head;
7699
7700 /* When creating a shared object, we must copy these
7701 reloc types into the output file. We create a reloc
7702 section in dynobj and make room for this reloc. */
7703 if (sreloc == NULL)
7704 {
7705 const char * name;
7706
7707 name = (bfd_elf_string_from_elf_section
7708 (abfd,
7709 elf_elfheader (abfd)->e_shstrndx,
7710 elf_section_data (sec)->rel_hdr.sh_name));
7711 if (name == NULL)
7712 return FALSE;
7713
7714 BFD_ASSERT (reloc_section_p (htab, name, sec));
7715
7716 sreloc = bfd_get_section_by_name (dynobj, name);
7717 if (sreloc == NULL)
7718 {
7719 flagword flags;
7720
7721 flags = (SEC_HAS_CONTENTS | SEC_READONLY
7722 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
7723 if ((sec->flags & SEC_ALLOC) != 0
7724 /* BPABI objects never have dynamic
7725 relocations mapped. */
7726 && !htab->symbian_p)
7727 flags |= SEC_ALLOC | SEC_LOAD;
7728 sreloc = bfd_make_section_with_flags (dynobj,
7729 name,
7730 flags);
7731 if (sreloc == NULL
7732 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
7733 return FALSE;
7734 }
7735
7736 elf_section_data (sec)->sreloc = sreloc;
7737 }
7738
7739 /* If this is a global symbol, we count the number of
7740 relocations we need for this symbol. */
7741 if (h != NULL)
7742 {
7743 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
7744 }
7745 else
7746 {
7747 /* Track dynamic relocs needed for local syms too.
7748 We really need local syms available to do this
7749 easily. Oh well. */
7750
7751 asection *s;
7752 void *vpp;
7753
7754 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
7755 sec, r_symndx);
7756 if (s == NULL)
7757 return FALSE;
7758
7759 vpp = &elf_section_data (s)->local_dynrel;
7760 head = (struct elf32_arm_relocs_copied **) vpp;
7761 }
7762
7763 p = *head;
7764 if (p == NULL || p->section != sec)
7765 {
7766 bfd_size_type amt = sizeof *p;
7767
7768 p = bfd_alloc (htab->root.dynobj, amt);
7769 if (p == NULL)
7770 return FALSE;
7771 p->next = *head;
7772 *head = p;
7773 p->section = sec;
7774 p->count = 0;
7775 p->pc_count = 0;
7776 }
7777
7778 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
7779 p->pc_count += 1;
7780 p->count += 1;
7781 }
7782 break;
7783
7784 /* This relocation describes the C++ object vtable hierarchy.
7785 Reconstruct it for later use during GC. */
7786 case R_ARM_GNU_VTINHERIT:
7787 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
7788 return FALSE;
7789 break;
7790
7791 /* This relocation describes which C++ vtable entries are actually
7792 used. Record for later use during GC. */
7793 case R_ARM_GNU_VTENTRY:
7794 BFD_ASSERT (h != NULL);
7795 if (h != NULL
7796 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
7797 return FALSE;
7798 break;
7799 }
7800 }
7801
7802 return TRUE;
7803 }
7804
7805 /* Unwinding tables are not referenced directly. This pass marks them as
7806 required if the corresponding code section is marked. */
7807
7808 static bfd_boolean
7809 elf32_arm_gc_mark_extra_sections(struct bfd_link_info *info,
7810 elf_gc_mark_hook_fn gc_mark_hook)
7811 {
7812 bfd *sub;
7813 Elf_Internal_Shdr **elf_shdrp;
7814 bfd_boolean again;
7815
7816 /* Marking EH data may cause additional code sections to be marked,
7817 requiring multiple passes. */
7818 again = TRUE;
7819 while (again)
7820 {
7821 again = FALSE;
7822 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
7823 {
7824 asection *o;
7825
7826 if (bfd_get_flavour (sub) != bfd_target_elf_flavour)
7827 continue;
7828
7829 elf_shdrp = elf_elfsections (sub);
7830 for (o = sub->sections; o != NULL; o = o->next)
7831 {
7832 Elf_Internal_Shdr *hdr;
7833 hdr = &elf_section_data (o)->this_hdr;
7834 if (hdr->sh_type == SHT_ARM_EXIDX && hdr->sh_link
7835 && !o->gc_mark
7836 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
7837 {
7838 again = TRUE;
7839 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
7840 return FALSE;
7841 }
7842 }
7843 }
7844 }
7845
7846 return TRUE;
7847 }
7848
7849 /* Treat mapping symbols as special target symbols. */
7850
7851 static bfd_boolean
7852 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
7853 {
7854 return bfd_is_arm_special_symbol_name (sym->name,
7855 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
7856 }
7857
7858 /* This is a copy of elf_find_function() from elf.c except that
7859 ARM mapping symbols are ignored when looking for function names
7860 and STT_ARM_TFUNC is considered to a function type. */
7861
7862 static bfd_boolean
7863 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
7864 asection * section,
7865 asymbol ** symbols,
7866 bfd_vma offset,
7867 const char ** filename_ptr,
7868 const char ** functionname_ptr)
7869 {
7870 const char * filename = NULL;
7871 asymbol * func = NULL;
7872 bfd_vma low_func = 0;
7873 asymbol ** p;
7874
7875 for (p = symbols; *p != NULL; p++)
7876 {
7877 elf_symbol_type *q;
7878
7879 q = (elf_symbol_type *) *p;
7880
7881 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7882 {
7883 default:
7884 break;
7885 case STT_FILE:
7886 filename = bfd_asymbol_name (&q->symbol);
7887 break;
7888 case STT_FUNC:
7889 case STT_ARM_TFUNC:
7890 case STT_NOTYPE:
7891 /* Skip mapping symbols. */
7892 if ((q->symbol.flags & BSF_LOCAL)
7893 && bfd_is_arm_special_symbol_name (q->symbol.name,
7894 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
7895 continue;
7896 /* Fall through. */
7897 if (bfd_get_section (&q->symbol) == section
7898 && q->symbol.value >= low_func
7899 && q->symbol.value <= offset)
7900 {
7901 func = (asymbol *) q;
7902 low_func = q->symbol.value;
7903 }
7904 break;
7905 }
7906 }
7907
7908 if (func == NULL)
7909 return FALSE;
7910
7911 if (filename_ptr)
7912 *filename_ptr = filename;
7913 if (functionname_ptr)
7914 *functionname_ptr = bfd_asymbol_name (func);
7915
7916 return TRUE;
7917 }
7918
7919
7920 /* Find the nearest line to a particular section and offset, for error
7921 reporting. This code is a duplicate of the code in elf.c, except
7922 that it uses arm_elf_find_function. */
7923
7924 static bfd_boolean
7925 elf32_arm_find_nearest_line (bfd * abfd,
7926 asection * section,
7927 asymbol ** symbols,
7928 bfd_vma offset,
7929 const char ** filename_ptr,
7930 const char ** functionname_ptr,
7931 unsigned int * line_ptr)
7932 {
7933 bfd_boolean found = FALSE;
7934
7935 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
7936
7937 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7938 filename_ptr, functionname_ptr,
7939 line_ptr, 0,
7940 & elf_tdata (abfd)->dwarf2_find_line_info))
7941 {
7942 if (!*functionname_ptr)
7943 arm_elf_find_function (abfd, section, symbols, offset,
7944 *filename_ptr ? NULL : filename_ptr,
7945 functionname_ptr);
7946
7947 return TRUE;
7948 }
7949
7950 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7951 & found, filename_ptr,
7952 functionname_ptr, line_ptr,
7953 & elf_tdata (abfd)->line_info))
7954 return FALSE;
7955
7956 if (found && (*functionname_ptr || *line_ptr))
7957 return TRUE;
7958
7959 if (symbols == NULL)
7960 return FALSE;
7961
7962 if (! arm_elf_find_function (abfd, section, symbols, offset,
7963 filename_ptr, functionname_ptr))
7964 return FALSE;
7965
7966 *line_ptr = 0;
7967 return TRUE;
7968 }
7969
7970 static bfd_boolean
7971 elf32_arm_find_inliner_info (bfd * abfd,
7972 const char ** filename_ptr,
7973 const char ** functionname_ptr,
7974 unsigned int * line_ptr)
7975 {
7976 bfd_boolean found;
7977 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7978 functionname_ptr, line_ptr,
7979 & elf_tdata (abfd)->dwarf2_find_line_info);
7980 return found;
7981 }
7982
7983 /* Adjust a symbol defined by a dynamic object and referenced by a
7984 regular object. The current definition is in some section of the
7985 dynamic object, but we're not including those sections. We have to
7986 change the definition to something the rest of the link can
7987 understand. */
7988
7989 static bfd_boolean
7990 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
7991 struct elf_link_hash_entry * h)
7992 {
7993 bfd * dynobj;
7994 asection * s;
7995 struct elf32_arm_link_hash_entry * eh;
7996 struct elf32_arm_link_hash_table *globals;
7997
7998 globals = elf32_arm_hash_table (info);
7999 dynobj = elf_hash_table (info)->dynobj;
8000
8001 /* Make sure we know what is going on here. */
8002 BFD_ASSERT (dynobj != NULL
8003 && (h->needs_plt
8004 || h->u.weakdef != NULL
8005 || (h->def_dynamic
8006 && h->ref_regular
8007 && !h->def_regular)));
8008
8009 eh = (struct elf32_arm_link_hash_entry *) h;
8010
8011 /* If this is a function, put it in the procedure linkage table. We
8012 will fill in the contents of the procedure linkage table later,
8013 when we know the address of the .got section. */
8014 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
8015 || h->needs_plt)
8016 {
8017 if (h->plt.refcount <= 0
8018 || SYMBOL_CALLS_LOCAL (info, h)
8019 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8020 && h->root.type == bfd_link_hash_undefweak))
8021 {
8022 /* This case can occur if we saw a PLT32 reloc in an input
8023 file, but the symbol was never referred to by a dynamic
8024 object, or if all references were garbage collected. In
8025 such a case, we don't actually need to build a procedure
8026 linkage table, and we can just do a PC24 reloc instead. */
8027 h->plt.offset = (bfd_vma) -1;
8028 eh->plt_thumb_refcount = 0;
8029 eh->plt_maybe_thumb_refcount = 0;
8030 h->needs_plt = 0;
8031 }
8032
8033 return TRUE;
8034 }
8035 else
8036 {
8037 /* It's possible that we incorrectly decided a .plt reloc was
8038 needed for an R_ARM_PC24 or similar reloc to a non-function sym
8039 in check_relocs. We can't decide accurately between function
8040 and non-function syms in check-relocs; Objects loaded later in
8041 the link may change h->type. So fix it now. */
8042 h->plt.offset = (bfd_vma) -1;
8043 eh->plt_thumb_refcount = 0;
8044 eh->plt_maybe_thumb_refcount = 0;
8045 }
8046
8047 /* If this is a weak symbol, and there is a real definition, the
8048 processor independent code will have arranged for us to see the
8049 real definition first, and we can just use the same value. */
8050 if (h->u.weakdef != NULL)
8051 {
8052 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
8053 || h->u.weakdef->root.type == bfd_link_hash_defweak);
8054 h->root.u.def.section = h->u.weakdef->root.u.def.section;
8055 h->root.u.def.value = h->u.weakdef->root.u.def.value;
8056 return TRUE;
8057 }
8058
8059 /* If there are no non-GOT references, we do not need a copy
8060 relocation. */
8061 if (!h->non_got_ref)
8062 return TRUE;
8063
8064 /* This is a reference to a symbol defined by a dynamic object which
8065 is not a function. */
8066
8067 /* If we are creating a shared library, we must presume that the
8068 only references to the symbol are via the global offset table.
8069 For such cases we need not do anything here; the relocations will
8070 be handled correctly by relocate_section. Relocatable executables
8071 can reference data in shared objects directly, so we don't need to
8072 do anything here. */
8073 if (info->shared || globals->root.is_relocatable_executable)
8074 return TRUE;
8075
8076 if (h->size == 0)
8077 {
8078 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
8079 h->root.root.string);
8080 return TRUE;
8081 }
8082
8083 /* We must allocate the symbol in our .dynbss section, which will
8084 become part of the .bss section of the executable. There will be
8085 an entry for this symbol in the .dynsym section. The dynamic
8086 object will contain position independent code, so all references
8087 from the dynamic object to this symbol will go through the global
8088 offset table. The dynamic linker will use the .dynsym entry to
8089 determine the address it must put in the global offset table, so
8090 both the dynamic object and the regular object will refer to the
8091 same memory location for the variable. */
8092 s = bfd_get_section_by_name (dynobj, ".dynbss");
8093 BFD_ASSERT (s != NULL);
8094
8095 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
8096 copy the initial value out of the dynamic object and into the
8097 runtime process image. We need to remember the offset into the
8098 .rel(a).bss section we are going to use. */
8099 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
8100 {
8101 asection *srel;
8102
8103 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
8104 BFD_ASSERT (srel != NULL);
8105 srel->size += RELOC_SIZE (globals);
8106 h->needs_copy = 1;
8107 }
8108
8109 return _bfd_elf_adjust_dynamic_copy (h, s);
8110 }
8111
8112 /* Allocate space in .plt, .got and associated reloc sections for
8113 dynamic relocs. */
8114
8115 static bfd_boolean
8116 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
8117 {
8118 struct bfd_link_info *info;
8119 struct elf32_arm_link_hash_table *htab;
8120 struct elf32_arm_link_hash_entry *eh;
8121 struct elf32_arm_relocs_copied *p;
8122 bfd_signed_vma thumb_refs;
8123
8124 eh = (struct elf32_arm_link_hash_entry *) h;
8125
8126 if (h->root.type == bfd_link_hash_indirect)
8127 return TRUE;
8128
8129 if (h->root.type == bfd_link_hash_warning)
8130 /* When warning symbols are created, they **replace** the "real"
8131 entry in the hash table, thus we never get to see the real
8132 symbol in a hash traversal. So look at it now. */
8133 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8134
8135 info = (struct bfd_link_info *) inf;
8136 htab = elf32_arm_hash_table (info);
8137
8138 if (htab->root.dynamic_sections_created
8139 && h->plt.refcount > 0)
8140 {
8141 /* Make sure this symbol is output as a dynamic symbol.
8142 Undefined weak syms won't yet be marked as dynamic. */
8143 if (h->dynindx == -1
8144 && !h->forced_local)
8145 {
8146 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8147 return FALSE;
8148 }
8149
8150 if (info->shared
8151 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
8152 {
8153 asection *s = htab->splt;
8154
8155 /* If this is the first .plt entry, make room for the special
8156 first entry. */
8157 if (s->size == 0)
8158 s->size += htab->plt_header_size;
8159
8160 h->plt.offset = s->size;
8161
8162 /* If we will insert a Thumb trampoline before this PLT, leave room
8163 for it. */
8164 thumb_refs = eh->plt_thumb_refcount;
8165 if (!htab->use_blx)
8166 thumb_refs += eh->plt_maybe_thumb_refcount;
8167
8168 if (thumb_refs > 0)
8169 {
8170 h->plt.offset += PLT_THUMB_STUB_SIZE;
8171 s->size += PLT_THUMB_STUB_SIZE;
8172 }
8173
8174 /* If this symbol is not defined in a regular file, and we are
8175 not generating a shared library, then set the symbol to this
8176 location in the .plt. This is required to make function
8177 pointers compare as equal between the normal executable and
8178 the shared library. */
8179 if (! info->shared
8180 && !h->def_regular)
8181 {
8182 h->root.u.def.section = s;
8183 h->root.u.def.value = h->plt.offset;
8184
8185 /* Make sure the function is not marked as Thumb, in case
8186 it is the target of an ABS32 relocation, which will
8187 point to the PLT entry. */
8188 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
8189 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8190 }
8191
8192 /* Make room for this entry. */
8193 s->size += htab->plt_entry_size;
8194
8195 if (!htab->symbian_p)
8196 {
8197 /* We also need to make an entry in the .got.plt section, which
8198 will be placed in the .got section by the linker script. */
8199 eh->plt_got_offset = htab->sgotplt->size;
8200 htab->sgotplt->size += 4;
8201 }
8202
8203 /* We also need to make an entry in the .rel(a).plt section. */
8204 htab->srelplt->size += RELOC_SIZE (htab);
8205
8206 /* VxWorks executables have a second set of relocations for
8207 each PLT entry. They go in a separate relocation section,
8208 which is processed by the kernel loader. */
8209 if (htab->vxworks_p && !info->shared)
8210 {
8211 /* There is a relocation for the initial PLT entry:
8212 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
8213 if (h->plt.offset == htab->plt_header_size)
8214 htab->srelplt2->size += RELOC_SIZE (htab);
8215
8216 /* There are two extra relocations for each subsequent
8217 PLT entry: an R_ARM_32 relocation for the GOT entry,
8218 and an R_ARM_32 relocation for the PLT entry. */
8219 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
8220 }
8221 }
8222 else
8223 {
8224 h->plt.offset = (bfd_vma) -1;
8225 h->needs_plt = 0;
8226 }
8227 }
8228 else
8229 {
8230 h->plt.offset = (bfd_vma) -1;
8231 h->needs_plt = 0;
8232 }
8233
8234 if (h->got.refcount > 0)
8235 {
8236 asection *s;
8237 bfd_boolean dyn;
8238 int tls_type = elf32_arm_hash_entry (h)->tls_type;
8239 int indx;
8240
8241 /* Make sure this symbol is output as a dynamic symbol.
8242 Undefined weak syms won't yet be marked as dynamic. */
8243 if (h->dynindx == -1
8244 && !h->forced_local)
8245 {
8246 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8247 return FALSE;
8248 }
8249
8250 if (!htab->symbian_p)
8251 {
8252 s = htab->sgot;
8253 h->got.offset = s->size;
8254
8255 if (tls_type == GOT_UNKNOWN)
8256 abort ();
8257
8258 if (tls_type == GOT_NORMAL)
8259 /* Non-TLS symbols need one GOT slot. */
8260 s->size += 4;
8261 else
8262 {
8263 if (tls_type & GOT_TLS_GD)
8264 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
8265 s->size += 8;
8266 if (tls_type & GOT_TLS_IE)
8267 /* R_ARM_TLS_IE32 needs one GOT slot. */
8268 s->size += 4;
8269 }
8270
8271 dyn = htab->root.dynamic_sections_created;
8272
8273 indx = 0;
8274 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8275 && (!info->shared
8276 || !SYMBOL_REFERENCES_LOCAL (info, h)))
8277 indx = h->dynindx;
8278
8279 if (tls_type != GOT_NORMAL
8280 && (info->shared || indx != 0)
8281 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8282 || h->root.type != bfd_link_hash_undefweak))
8283 {
8284 if (tls_type & GOT_TLS_IE)
8285 htab->srelgot->size += RELOC_SIZE (htab);
8286
8287 if (tls_type & GOT_TLS_GD)
8288 htab->srelgot->size += RELOC_SIZE (htab);
8289
8290 if ((tls_type & GOT_TLS_GD) && indx != 0)
8291 htab->srelgot->size += RELOC_SIZE (htab);
8292 }
8293 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8294 || h->root.type != bfd_link_hash_undefweak)
8295 && (info->shared
8296 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
8297 htab->srelgot->size += RELOC_SIZE (htab);
8298 }
8299 }
8300 else
8301 h->got.offset = (bfd_vma) -1;
8302
8303 /* Allocate stubs for exported Thumb functions on v4t. */
8304 if (!htab->use_blx && h->dynindx != -1
8305 && h->def_regular
8306 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
8307 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
8308 {
8309 struct elf_link_hash_entry * th;
8310 struct bfd_link_hash_entry * bh;
8311 struct elf_link_hash_entry * myh;
8312 char name[1024];
8313 asection *s;
8314 bh = NULL;
8315 /* Create a new symbol to regist the real location of the function. */
8316 s = h->root.u.def.section;
8317 sprintf(name, "__real_%s", h->root.root.string);
8318 _bfd_generic_link_add_one_symbol (info, s->owner,
8319 name, BSF_GLOBAL, s,
8320 h->root.u.def.value,
8321 NULL, TRUE, FALSE, &bh);
8322
8323 myh = (struct elf_link_hash_entry *) bh;
8324 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
8325 myh->forced_local = 1;
8326 eh->export_glue = myh;
8327 th = record_arm_to_thumb_glue (info, h);
8328 /* Point the symbol at the stub. */
8329 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8330 h->root.u.def.section = th->root.u.def.section;
8331 h->root.u.def.value = th->root.u.def.value & ~1;
8332 }
8333
8334 if (eh->relocs_copied == NULL)
8335 return TRUE;
8336
8337 /* In the shared -Bsymbolic case, discard space allocated for
8338 dynamic pc-relative relocs against symbols which turn out to be
8339 defined in regular objects. For the normal shared case, discard
8340 space for pc-relative relocs that have become local due to symbol
8341 visibility changes. */
8342
8343 if (info->shared || htab->root.is_relocatable_executable)
8344 {
8345 /* The only relocs that use pc_count are R_ARM_REL32 and
8346 R_ARM_REL32_NOI, which will appear on something like
8347 ".long foo - .". We want calls to protected symbols to resolve
8348 directly to the function rather than going via the plt. If people
8349 want function pointer comparisons to work as expected then they
8350 should avoid writing assembly like ".long foo - .". */
8351 if (SYMBOL_CALLS_LOCAL (info, h))
8352 {
8353 struct elf32_arm_relocs_copied **pp;
8354
8355 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
8356 {
8357 p->count -= p->pc_count;
8358 p->pc_count = 0;
8359 if (p->count == 0)
8360 *pp = p->next;
8361 else
8362 pp = &p->next;
8363 }
8364 }
8365
8366 /* Also discard relocs on undefined weak syms with non-default
8367 visibility. */
8368 if (eh->relocs_copied != NULL
8369 && h->root.type == bfd_link_hash_undefweak)
8370 {
8371 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8372 eh->relocs_copied = NULL;
8373
8374 /* Make sure undefined weak symbols are output as a dynamic
8375 symbol in PIEs. */
8376 else if (h->dynindx == -1
8377 && !h->forced_local)
8378 {
8379 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8380 return FALSE;
8381 }
8382 }
8383
8384 else if (htab->root.is_relocatable_executable && h->dynindx == -1
8385 && h->root.type == bfd_link_hash_new)
8386 {
8387 /* Output absolute symbols so that we can create relocations
8388 against them. For normal symbols we output a relocation
8389 against the section that contains them. */
8390 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8391 return FALSE;
8392 }
8393
8394 }
8395 else
8396 {
8397 /* For the non-shared case, discard space for relocs against
8398 symbols which turn out to need copy relocs or are not
8399 dynamic. */
8400
8401 if (!h->non_got_ref
8402 && ((h->def_dynamic
8403 && !h->def_regular)
8404 || (htab->root.dynamic_sections_created
8405 && (h->root.type == bfd_link_hash_undefweak
8406 || h->root.type == bfd_link_hash_undefined))))
8407 {
8408 /* Make sure this symbol is output as a dynamic symbol.
8409 Undefined weak syms won't yet be marked as dynamic. */
8410 if (h->dynindx == -1
8411 && !h->forced_local)
8412 {
8413 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8414 return FALSE;
8415 }
8416
8417 /* If that succeeded, we know we'll be keeping all the
8418 relocs. */
8419 if (h->dynindx != -1)
8420 goto keep;
8421 }
8422
8423 eh->relocs_copied = NULL;
8424
8425 keep: ;
8426 }
8427
8428 /* Finally, allocate space. */
8429 for (p = eh->relocs_copied; p != NULL; p = p->next)
8430 {
8431 asection *sreloc = elf_section_data (p->section)->sreloc;
8432 sreloc->size += p->count * RELOC_SIZE (htab);
8433 }
8434
8435 return TRUE;
8436 }
8437
8438 /* Find any dynamic relocs that apply to read-only sections. */
8439
8440 static bfd_boolean
8441 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
8442 {
8443 struct elf32_arm_link_hash_entry *eh;
8444 struct elf32_arm_relocs_copied *p;
8445
8446 if (h->root.type == bfd_link_hash_warning)
8447 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8448
8449 eh = (struct elf32_arm_link_hash_entry *) h;
8450 for (p = eh->relocs_copied; p != NULL; p = p->next)
8451 {
8452 asection *s = p->section;
8453
8454 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8455 {
8456 struct bfd_link_info *info = (struct bfd_link_info *) inf;
8457
8458 info->flags |= DF_TEXTREL;
8459
8460 /* Not an error, just cut short the traversal. */
8461 return FALSE;
8462 }
8463 }
8464 return TRUE;
8465 }
8466
8467 void
8468 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
8469 int byteswap_code)
8470 {
8471 struct elf32_arm_link_hash_table *globals;
8472
8473 globals = elf32_arm_hash_table (info);
8474 globals->byteswap_code = byteswap_code;
8475 }
8476
8477 /* Set the sizes of the dynamic sections. */
8478
8479 static bfd_boolean
8480 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
8481 struct bfd_link_info * info)
8482 {
8483 bfd * dynobj;
8484 asection * s;
8485 bfd_boolean plt;
8486 bfd_boolean relocs;
8487 bfd *ibfd;
8488 struct elf32_arm_link_hash_table *htab;
8489
8490 htab = elf32_arm_hash_table (info);
8491 dynobj = elf_hash_table (info)->dynobj;
8492 BFD_ASSERT (dynobj != NULL);
8493 check_use_blx (htab);
8494
8495 if (elf_hash_table (info)->dynamic_sections_created)
8496 {
8497 /* Set the contents of the .interp section to the interpreter. */
8498 if (info->executable)
8499 {
8500 s = bfd_get_section_by_name (dynobj, ".interp");
8501 BFD_ASSERT (s != NULL);
8502 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8503 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8504 }
8505 }
8506
8507 /* Set up .got offsets for local syms, and space for local dynamic
8508 relocs. */
8509 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8510 {
8511 bfd_signed_vma *local_got;
8512 bfd_signed_vma *end_local_got;
8513 char *local_tls_type;
8514 bfd_size_type locsymcount;
8515 Elf_Internal_Shdr *symtab_hdr;
8516 asection *srel;
8517
8518 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
8519 continue;
8520
8521 for (s = ibfd->sections; s != NULL; s = s->next)
8522 {
8523 struct elf32_arm_relocs_copied *p;
8524
8525 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8526 {
8527 if (!bfd_is_abs_section (p->section)
8528 && bfd_is_abs_section (p->section->output_section))
8529 {
8530 /* Input section has been discarded, either because
8531 it is a copy of a linkonce section or due to
8532 linker script /DISCARD/, so we'll be discarding
8533 the relocs too. */
8534 }
8535 else if (p->count != 0)
8536 {
8537 srel = elf_section_data (p->section)->sreloc;
8538 srel->size += p->count * RELOC_SIZE (htab);
8539 if ((p->section->output_section->flags & SEC_READONLY) != 0)
8540 info->flags |= DF_TEXTREL;
8541 }
8542 }
8543 }
8544
8545 local_got = elf_local_got_refcounts (ibfd);
8546 if (!local_got)
8547 continue;
8548
8549 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
8550 locsymcount = symtab_hdr->sh_info;
8551 end_local_got = local_got + locsymcount;
8552 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
8553 s = htab->sgot;
8554 srel = htab->srelgot;
8555 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
8556 {
8557 if (*local_got > 0)
8558 {
8559 *local_got = s->size;
8560 if (*local_tls_type & GOT_TLS_GD)
8561 /* TLS_GD relocs need an 8-byte structure in the GOT. */
8562 s->size += 8;
8563 if (*local_tls_type & GOT_TLS_IE)
8564 s->size += 4;
8565 if (*local_tls_type == GOT_NORMAL)
8566 s->size += 4;
8567
8568 if (info->shared || *local_tls_type == GOT_TLS_GD)
8569 srel->size += RELOC_SIZE (htab);
8570 }
8571 else
8572 *local_got = (bfd_vma) -1;
8573 }
8574 }
8575
8576 if (htab->tls_ldm_got.refcount > 0)
8577 {
8578 /* Allocate two GOT entries and one dynamic relocation (if necessary)
8579 for R_ARM_TLS_LDM32 relocations. */
8580 htab->tls_ldm_got.offset = htab->sgot->size;
8581 htab->sgot->size += 8;
8582 if (info->shared)
8583 htab->srelgot->size += RELOC_SIZE (htab);
8584 }
8585 else
8586 htab->tls_ldm_got.offset = -1;
8587
8588 /* Allocate global sym .plt and .got entries, and space for global
8589 sym dynamic relocs. */
8590 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
8591
8592 /* Here we rummage through the found bfds to collect glue information. */
8593 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8594 {
8595 /* Initialise mapping tables for code/data. */
8596 bfd_elf32_arm_init_maps (ibfd);
8597
8598 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
8599 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
8600 /* xgettext:c-format */
8601 _bfd_error_handler (_("Errors encountered processing file %s"),
8602 ibfd->filename);
8603 }
8604
8605 /* The check_relocs and adjust_dynamic_symbol entry points have
8606 determined the sizes of the various dynamic sections. Allocate
8607 memory for them. */
8608 plt = FALSE;
8609 relocs = FALSE;
8610 for (s = dynobj->sections; s != NULL; s = s->next)
8611 {
8612 const char * name;
8613
8614 if ((s->flags & SEC_LINKER_CREATED) == 0)
8615 continue;
8616
8617 /* It's OK to base decisions on the section name, because none
8618 of the dynobj section names depend upon the input files. */
8619 name = bfd_get_section_name (dynobj, s);
8620
8621 if (strcmp (name, ".plt") == 0)
8622 {
8623 /* Remember whether there is a PLT. */
8624 plt = s->size != 0;
8625 }
8626 else if (CONST_STRNEQ (name, ".rel"))
8627 {
8628 if (s->size != 0)
8629 {
8630 /* Remember whether there are any reloc sections other
8631 than .rel(a).plt and .rela.plt.unloaded. */
8632 if (s != htab->srelplt && s != htab->srelplt2)
8633 relocs = TRUE;
8634
8635 /* We use the reloc_count field as a counter if we need
8636 to copy relocs into the output file. */
8637 s->reloc_count = 0;
8638 }
8639 }
8640 else if (! CONST_STRNEQ (name, ".got")
8641 && strcmp (name, ".dynbss") != 0)
8642 {
8643 /* It's not one of our sections, so don't allocate space. */
8644 continue;
8645 }
8646
8647 if (s->size == 0)
8648 {
8649 /* If we don't need this section, strip it from the
8650 output file. This is mostly to handle .rel(a).bss and
8651 .rel(a).plt. We must create both sections in
8652 create_dynamic_sections, because they must be created
8653 before the linker maps input sections to output
8654 sections. The linker does that before
8655 adjust_dynamic_symbol is called, and it is that
8656 function which decides whether anything needs to go
8657 into these sections. */
8658 s->flags |= SEC_EXCLUDE;
8659 continue;
8660 }
8661
8662 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8663 continue;
8664
8665 /* Allocate memory for the section contents. */
8666 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
8667 if (s->contents == NULL)
8668 return FALSE;
8669 }
8670
8671 if (elf_hash_table (info)->dynamic_sections_created)
8672 {
8673 /* Add some entries to the .dynamic section. We fill in the
8674 values later, in elf32_arm_finish_dynamic_sections, but we
8675 must add the entries now so that we get the correct size for
8676 the .dynamic section. The DT_DEBUG entry is filled in by the
8677 dynamic linker and used by the debugger. */
8678 #define add_dynamic_entry(TAG, VAL) \
8679 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8680
8681 if (info->executable)
8682 {
8683 if (!add_dynamic_entry (DT_DEBUG, 0))
8684 return FALSE;
8685 }
8686
8687 if (plt)
8688 {
8689 if ( !add_dynamic_entry (DT_PLTGOT, 0)
8690 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8691 || !add_dynamic_entry (DT_PLTREL,
8692 htab->use_rel ? DT_REL : DT_RELA)
8693 || !add_dynamic_entry (DT_JMPREL, 0))
8694 return FALSE;
8695 }
8696
8697 if (relocs)
8698 {
8699 if (htab->use_rel)
8700 {
8701 if (!add_dynamic_entry (DT_REL, 0)
8702 || !add_dynamic_entry (DT_RELSZ, 0)
8703 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
8704 return FALSE;
8705 }
8706 else
8707 {
8708 if (!add_dynamic_entry (DT_RELA, 0)
8709 || !add_dynamic_entry (DT_RELASZ, 0)
8710 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
8711 return FALSE;
8712 }
8713 }
8714
8715 /* If any dynamic relocs apply to a read-only section,
8716 then we need a DT_TEXTREL entry. */
8717 if ((info->flags & DF_TEXTREL) == 0)
8718 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
8719 (PTR) info);
8720
8721 if ((info->flags & DF_TEXTREL) != 0)
8722 {
8723 if (!add_dynamic_entry (DT_TEXTREL, 0))
8724 return FALSE;
8725 }
8726 }
8727 #undef add_dynamic_entry
8728
8729 return TRUE;
8730 }
8731
8732 /* Finish up dynamic symbol handling. We set the contents of various
8733 dynamic sections here. */
8734
8735 static bfd_boolean
8736 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
8737 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
8738 {
8739 bfd * dynobj;
8740 struct elf32_arm_link_hash_table *htab;
8741 struct elf32_arm_link_hash_entry *eh;
8742
8743 dynobj = elf_hash_table (info)->dynobj;
8744 htab = elf32_arm_hash_table (info);
8745 eh = (struct elf32_arm_link_hash_entry *) h;
8746
8747 if (h->plt.offset != (bfd_vma) -1)
8748 {
8749 asection * splt;
8750 asection * srel;
8751 bfd_byte *loc;
8752 bfd_vma plt_index;
8753 Elf_Internal_Rela rel;
8754
8755 /* This symbol has an entry in the procedure linkage table. Set
8756 it up. */
8757
8758 BFD_ASSERT (h->dynindx != -1);
8759
8760 splt = bfd_get_section_by_name (dynobj, ".plt");
8761 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
8762 BFD_ASSERT (splt != NULL && srel != NULL);
8763
8764 /* Fill in the entry in the procedure linkage table. */
8765 if (htab->symbian_p)
8766 {
8767 put_arm_insn (htab, output_bfd,
8768 elf32_arm_symbian_plt_entry[0],
8769 splt->contents + h->plt.offset);
8770 bfd_put_32 (output_bfd,
8771 elf32_arm_symbian_plt_entry[1],
8772 splt->contents + h->plt.offset + 4);
8773
8774 /* Fill in the entry in the .rel.plt section. */
8775 rel.r_offset = (splt->output_section->vma
8776 + splt->output_offset
8777 + h->plt.offset + 4);
8778 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8779
8780 /* Get the index in the procedure linkage table which
8781 corresponds to this symbol. This is the index of this symbol
8782 in all the symbols for which we are making plt entries. The
8783 first entry in the procedure linkage table is reserved. */
8784 plt_index = ((h->plt.offset - htab->plt_header_size)
8785 / htab->plt_entry_size);
8786 }
8787 else
8788 {
8789 bfd_vma got_offset, got_address, plt_address;
8790 bfd_vma got_displacement;
8791 asection * sgot;
8792 bfd_byte * ptr;
8793
8794 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
8795 BFD_ASSERT (sgot != NULL);
8796
8797 /* Get the offset into the .got.plt table of the entry that
8798 corresponds to this function. */
8799 got_offset = eh->plt_got_offset;
8800
8801 /* Get the index in the procedure linkage table which
8802 corresponds to this symbol. This is the index of this symbol
8803 in all the symbols for which we are making plt entries. The
8804 first three entries in .got.plt are reserved; after that
8805 symbols appear in the same order as in .plt. */
8806 plt_index = (got_offset - 12) / 4;
8807
8808 /* Calculate the address of the GOT entry. */
8809 got_address = (sgot->output_section->vma
8810 + sgot->output_offset
8811 + got_offset);
8812
8813 /* ...and the address of the PLT entry. */
8814 plt_address = (splt->output_section->vma
8815 + splt->output_offset
8816 + h->plt.offset);
8817
8818 ptr = htab->splt->contents + h->plt.offset;
8819 if (htab->vxworks_p && info->shared)
8820 {
8821 unsigned int i;
8822 bfd_vma val;
8823
8824 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8825 {
8826 val = elf32_arm_vxworks_shared_plt_entry[i];
8827 if (i == 2)
8828 val |= got_address - sgot->output_section->vma;
8829 if (i == 5)
8830 val |= plt_index * RELOC_SIZE (htab);
8831 if (i == 2 || i == 5)
8832 bfd_put_32 (output_bfd, val, ptr);
8833 else
8834 put_arm_insn (htab, output_bfd, val, ptr);
8835 }
8836 }
8837 else if (htab->vxworks_p)
8838 {
8839 unsigned int i;
8840 bfd_vma val;
8841
8842 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8843 {
8844 val = elf32_arm_vxworks_exec_plt_entry[i];
8845 if (i == 2)
8846 val |= got_address;
8847 if (i == 4)
8848 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
8849 if (i == 5)
8850 val |= plt_index * RELOC_SIZE (htab);
8851 if (i == 2 || i == 5)
8852 bfd_put_32 (output_bfd, val, ptr);
8853 else
8854 put_arm_insn (htab, output_bfd, val, ptr);
8855 }
8856
8857 loc = (htab->srelplt2->contents
8858 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
8859
8860 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
8861 referencing the GOT for this PLT entry. */
8862 rel.r_offset = plt_address + 8;
8863 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
8864 rel.r_addend = got_offset;
8865 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8866 loc += RELOC_SIZE (htab);
8867
8868 /* Create the R_ARM_ABS32 relocation referencing the
8869 beginning of the PLT for this GOT entry. */
8870 rel.r_offset = got_address;
8871 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
8872 rel.r_addend = 0;
8873 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8874 }
8875 else
8876 {
8877 bfd_signed_vma thumb_refs;
8878 /* Calculate the displacement between the PLT slot and the
8879 entry in the GOT. The eight-byte offset accounts for the
8880 value produced by adding to pc in the first instruction
8881 of the PLT stub. */
8882 got_displacement = got_address - (plt_address + 8);
8883
8884 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
8885
8886 thumb_refs = eh->plt_thumb_refcount;
8887 if (!htab->use_blx)
8888 thumb_refs += eh->plt_maybe_thumb_refcount;
8889
8890 if (thumb_refs > 0)
8891 {
8892 put_thumb_insn (htab, output_bfd,
8893 elf32_arm_plt_thumb_stub[0], ptr - 4);
8894 put_thumb_insn (htab, output_bfd,
8895 elf32_arm_plt_thumb_stub[1], ptr - 2);
8896 }
8897
8898 put_arm_insn (htab, output_bfd,
8899 elf32_arm_plt_entry[0]
8900 | ((got_displacement & 0x0ff00000) >> 20),
8901 ptr + 0);
8902 put_arm_insn (htab, output_bfd,
8903 elf32_arm_plt_entry[1]
8904 | ((got_displacement & 0x000ff000) >> 12),
8905 ptr+ 4);
8906 put_arm_insn (htab, output_bfd,
8907 elf32_arm_plt_entry[2]
8908 | (got_displacement & 0x00000fff),
8909 ptr + 8);
8910 #ifdef FOUR_WORD_PLT
8911 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
8912 #endif
8913 }
8914
8915 /* Fill in the entry in the global offset table. */
8916 bfd_put_32 (output_bfd,
8917 (splt->output_section->vma
8918 + splt->output_offset),
8919 sgot->contents + got_offset);
8920
8921 /* Fill in the entry in the .rel(a).plt section. */
8922 rel.r_addend = 0;
8923 rel.r_offset = got_address;
8924 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
8925 }
8926
8927 loc = srel->contents + plt_index * RELOC_SIZE (htab);
8928 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8929
8930 if (!h->def_regular)
8931 {
8932 /* Mark the symbol as undefined, rather than as defined in
8933 the .plt section. Leave the value alone. */
8934 sym->st_shndx = SHN_UNDEF;
8935 /* If the symbol is weak, we do need to clear the value.
8936 Otherwise, the PLT entry would provide a definition for
8937 the symbol even if the symbol wasn't defined anywhere,
8938 and so the symbol would never be NULL. */
8939 if (!h->ref_regular_nonweak)
8940 sym->st_value = 0;
8941 }
8942 }
8943
8944 if (h->got.offset != (bfd_vma) -1
8945 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
8946 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
8947 {
8948 asection * sgot;
8949 asection * srel;
8950 Elf_Internal_Rela rel;
8951 bfd_byte *loc;
8952 bfd_vma offset;
8953
8954 /* This symbol has an entry in the global offset table. Set it
8955 up. */
8956 sgot = bfd_get_section_by_name (dynobj, ".got");
8957 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
8958 BFD_ASSERT (sgot != NULL && srel != NULL);
8959
8960 offset = (h->got.offset & ~(bfd_vma) 1);
8961 rel.r_addend = 0;
8962 rel.r_offset = (sgot->output_section->vma
8963 + sgot->output_offset
8964 + offset);
8965
8966 /* If this is a static link, or it is a -Bsymbolic link and the
8967 symbol is defined locally or was forced to be local because
8968 of a version file, we just want to emit a RELATIVE reloc.
8969 The entry in the global offset table will already have been
8970 initialized in the relocate_section function. */
8971 if (info->shared
8972 && SYMBOL_REFERENCES_LOCAL (info, h))
8973 {
8974 BFD_ASSERT((h->got.offset & 1) != 0);
8975 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
8976 if (!htab->use_rel)
8977 {
8978 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
8979 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
8980 }
8981 }
8982 else
8983 {
8984 BFD_ASSERT((h->got.offset & 1) == 0);
8985 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
8986 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8987 }
8988
8989 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
8990 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8991 }
8992
8993 if (h->needs_copy)
8994 {
8995 asection * s;
8996 Elf_Internal_Rela rel;
8997 bfd_byte *loc;
8998
8999 /* This symbol needs a copy reloc. Set it up. */
9000 BFD_ASSERT (h->dynindx != -1
9001 && (h->root.type == bfd_link_hash_defined
9002 || h->root.type == bfd_link_hash_defweak));
9003
9004 s = bfd_get_section_by_name (h->root.u.def.section->owner,
9005 RELOC_SECTION (htab, ".bss"));
9006 BFD_ASSERT (s != NULL);
9007
9008 rel.r_addend = 0;
9009 rel.r_offset = (h->root.u.def.value
9010 + h->root.u.def.section->output_section->vma
9011 + h->root.u.def.section->output_offset);
9012 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
9013 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
9014 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9015 }
9016
9017 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
9018 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
9019 to the ".got" section. */
9020 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
9021 || (!htab->vxworks_p && h == htab->root.hgot))
9022 sym->st_shndx = SHN_ABS;
9023
9024 return TRUE;
9025 }
9026
9027 /* Finish up the dynamic sections. */
9028
9029 static bfd_boolean
9030 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
9031 {
9032 bfd * dynobj;
9033 asection * sgot;
9034 asection * sdyn;
9035
9036 dynobj = elf_hash_table (info)->dynobj;
9037
9038 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
9039 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
9040 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
9041
9042 if (elf_hash_table (info)->dynamic_sections_created)
9043 {
9044 asection *splt;
9045 Elf32_External_Dyn *dyncon, *dynconend;
9046 struct elf32_arm_link_hash_table *htab;
9047
9048 htab = elf32_arm_hash_table (info);
9049 splt = bfd_get_section_by_name (dynobj, ".plt");
9050 BFD_ASSERT (splt != NULL && sdyn != NULL);
9051
9052 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9053 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9054
9055 for (; dyncon < dynconend; dyncon++)
9056 {
9057 Elf_Internal_Dyn dyn;
9058 const char * name;
9059 asection * s;
9060
9061 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9062
9063 switch (dyn.d_tag)
9064 {
9065 unsigned int type;
9066
9067 default:
9068 break;
9069
9070 case DT_HASH:
9071 name = ".hash";
9072 goto get_vma_if_bpabi;
9073 case DT_STRTAB:
9074 name = ".dynstr";
9075 goto get_vma_if_bpabi;
9076 case DT_SYMTAB:
9077 name = ".dynsym";
9078 goto get_vma_if_bpabi;
9079 case DT_VERSYM:
9080 name = ".gnu.version";
9081 goto get_vma_if_bpabi;
9082 case DT_VERDEF:
9083 name = ".gnu.version_d";
9084 goto get_vma_if_bpabi;
9085 case DT_VERNEED:
9086 name = ".gnu.version_r";
9087 goto get_vma_if_bpabi;
9088
9089 case DT_PLTGOT:
9090 name = ".got";
9091 goto get_vma;
9092 case DT_JMPREL:
9093 name = RELOC_SECTION (htab, ".plt");
9094 get_vma:
9095 s = bfd_get_section_by_name (output_bfd, name);
9096 BFD_ASSERT (s != NULL);
9097 if (!htab->symbian_p)
9098 dyn.d_un.d_ptr = s->vma;
9099 else
9100 /* In the BPABI, tags in the PT_DYNAMIC section point
9101 at the file offset, not the memory address, for the
9102 convenience of the post linker. */
9103 dyn.d_un.d_ptr = s->filepos;
9104 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9105 break;
9106
9107 get_vma_if_bpabi:
9108 if (htab->symbian_p)
9109 goto get_vma;
9110 break;
9111
9112 case DT_PLTRELSZ:
9113 s = bfd_get_section_by_name (output_bfd,
9114 RELOC_SECTION (htab, ".plt"));
9115 BFD_ASSERT (s != NULL);
9116 dyn.d_un.d_val = s->size;
9117 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9118 break;
9119
9120 case DT_RELSZ:
9121 case DT_RELASZ:
9122 if (!htab->symbian_p)
9123 {
9124 /* My reading of the SVR4 ABI indicates that the
9125 procedure linkage table relocs (DT_JMPREL) should be
9126 included in the overall relocs (DT_REL). This is
9127 what Solaris does. However, UnixWare can not handle
9128 that case. Therefore, we override the DT_RELSZ entry
9129 here to make it not include the JMPREL relocs. Since
9130 the linker script arranges for .rel(a).plt to follow all
9131 other relocation sections, we don't have to worry
9132 about changing the DT_REL entry. */
9133 s = bfd_get_section_by_name (output_bfd,
9134 RELOC_SECTION (htab, ".plt"));
9135 if (s != NULL)
9136 dyn.d_un.d_val -= s->size;
9137 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9138 break;
9139 }
9140 /* Fall through */
9141
9142 case DT_REL:
9143 case DT_RELA:
9144 /* In the BPABI, the DT_REL tag must point at the file
9145 offset, not the VMA, of the first relocation
9146 section. So, we use code similar to that in
9147 elflink.c, but do not check for SHF_ALLOC on the
9148 relcoation section, since relocations sections are
9149 never allocated under the BPABI. The comments above
9150 about Unixware notwithstanding, we include all of the
9151 relocations here. */
9152 if (htab->symbian_p)
9153 {
9154 unsigned int i;
9155 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
9156 ? SHT_REL : SHT_RELA);
9157 dyn.d_un.d_val = 0;
9158 for (i = 1; i < elf_numsections (output_bfd); i++)
9159 {
9160 Elf_Internal_Shdr *hdr
9161 = elf_elfsections (output_bfd)[i];
9162 if (hdr->sh_type == type)
9163 {
9164 if (dyn.d_tag == DT_RELSZ
9165 || dyn.d_tag == DT_RELASZ)
9166 dyn.d_un.d_val += hdr->sh_size;
9167 else if ((ufile_ptr) hdr->sh_offset
9168 <= dyn.d_un.d_val - 1)
9169 dyn.d_un.d_val = hdr->sh_offset;
9170 }
9171 }
9172 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9173 }
9174 break;
9175
9176 /* Set the bottom bit of DT_INIT/FINI if the
9177 corresponding function is Thumb. */
9178 case DT_INIT:
9179 name = info->init_function;
9180 goto get_sym;
9181 case DT_FINI:
9182 name = info->fini_function;
9183 get_sym:
9184 /* If it wasn't set by elf_bfd_final_link
9185 then there is nothing to adjust. */
9186 if (dyn.d_un.d_val != 0)
9187 {
9188 struct elf_link_hash_entry * eh;
9189
9190 eh = elf_link_hash_lookup (elf_hash_table (info), name,
9191 FALSE, FALSE, TRUE);
9192 if (eh != (struct elf_link_hash_entry *) NULL
9193 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
9194 {
9195 dyn.d_un.d_val |= 1;
9196 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9197 }
9198 }
9199 break;
9200 }
9201 }
9202
9203 /* Fill in the first entry in the procedure linkage table. */
9204 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
9205 {
9206 const bfd_vma *plt0_entry;
9207 bfd_vma got_address, plt_address, got_displacement;
9208
9209 /* Calculate the addresses of the GOT and PLT. */
9210 got_address = sgot->output_section->vma + sgot->output_offset;
9211 plt_address = splt->output_section->vma + splt->output_offset;
9212
9213 if (htab->vxworks_p)
9214 {
9215 /* The VxWorks GOT is relocated by the dynamic linker.
9216 Therefore, we must emit relocations rather than simply
9217 computing the values now. */
9218 Elf_Internal_Rela rel;
9219
9220 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
9221 put_arm_insn (htab, output_bfd, plt0_entry[0],
9222 splt->contents + 0);
9223 put_arm_insn (htab, output_bfd, plt0_entry[1],
9224 splt->contents + 4);
9225 put_arm_insn (htab, output_bfd, plt0_entry[2],
9226 splt->contents + 8);
9227 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
9228
9229 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
9230 rel.r_offset = plt_address + 12;
9231 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9232 rel.r_addend = 0;
9233 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
9234 htab->srelplt2->contents);
9235 }
9236 else
9237 {
9238 got_displacement = got_address - (plt_address + 16);
9239
9240 plt0_entry = elf32_arm_plt0_entry;
9241 put_arm_insn (htab, output_bfd, plt0_entry[0],
9242 splt->contents + 0);
9243 put_arm_insn (htab, output_bfd, plt0_entry[1],
9244 splt->contents + 4);
9245 put_arm_insn (htab, output_bfd, plt0_entry[2],
9246 splt->contents + 8);
9247 put_arm_insn (htab, output_bfd, plt0_entry[3],
9248 splt->contents + 12);
9249
9250 #ifdef FOUR_WORD_PLT
9251 /* The displacement value goes in the otherwise-unused
9252 last word of the second entry. */
9253 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
9254 #else
9255 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
9256 #endif
9257 }
9258 }
9259
9260 /* UnixWare sets the entsize of .plt to 4, although that doesn't
9261 really seem like the right value. */
9262 if (splt->output_section->owner == output_bfd)
9263 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
9264
9265 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
9266 {
9267 /* Correct the .rel(a).plt.unloaded relocations. They will have
9268 incorrect symbol indexes. */
9269 int num_plts;
9270 unsigned char *p;
9271
9272 num_plts = ((htab->splt->size - htab->plt_header_size)
9273 / htab->plt_entry_size);
9274 p = htab->srelplt2->contents + RELOC_SIZE (htab);
9275
9276 for (; num_plts; num_plts--)
9277 {
9278 Elf_Internal_Rela rel;
9279
9280 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9281 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9282 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9283 p += RELOC_SIZE (htab);
9284
9285 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9286 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9287 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9288 p += RELOC_SIZE (htab);
9289 }
9290 }
9291 }
9292
9293 /* Fill in the first three entries in the global offset table. */
9294 if (sgot)
9295 {
9296 if (sgot->size > 0)
9297 {
9298 if (sdyn == NULL)
9299 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
9300 else
9301 bfd_put_32 (output_bfd,
9302 sdyn->output_section->vma + sdyn->output_offset,
9303 sgot->contents);
9304 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
9305 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
9306 }
9307
9308 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
9309 }
9310
9311 return TRUE;
9312 }
9313
9314 static void
9315 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9316 {
9317 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9318 struct elf32_arm_link_hash_table *globals;
9319
9320 i_ehdrp = elf_elfheader (abfd);
9321
9322 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
9323 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
9324 else
9325 i_ehdrp->e_ident[EI_OSABI] = 0;
9326 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
9327
9328 if (link_info)
9329 {
9330 globals = elf32_arm_hash_table (link_info);
9331 if (globals->byteswap_code)
9332 i_ehdrp->e_flags |= EF_ARM_BE8;
9333 }
9334 }
9335
9336 static enum elf_reloc_type_class
9337 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
9338 {
9339 switch ((int) ELF32_R_TYPE (rela->r_info))
9340 {
9341 case R_ARM_RELATIVE:
9342 return reloc_class_relative;
9343 case R_ARM_JUMP_SLOT:
9344 return reloc_class_plt;
9345 case R_ARM_COPY:
9346 return reloc_class_copy;
9347 default:
9348 return reloc_class_normal;
9349 }
9350 }
9351
9352 /* Set the right machine number for an Arm ELF file. */
9353
9354 static bfd_boolean
9355 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
9356 {
9357 if (hdr->sh_type == SHT_NOTE)
9358 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
9359
9360 return TRUE;
9361 }
9362
9363 static void
9364 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
9365 {
9366 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
9367 }
9368
9369 /* Return TRUE if this is an unwinding table entry. */
9370
9371 static bfd_boolean
9372 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
9373 {
9374 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
9375 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
9376 }
9377
9378
9379 /* Set the type and flags for an ARM section. We do this by
9380 the section name, which is a hack, but ought to work. */
9381
9382 static bfd_boolean
9383 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
9384 {
9385 const char * name;
9386
9387 name = bfd_get_section_name (abfd, sec);
9388
9389 if (is_arm_elf_unwind_section_name (abfd, name))
9390 {
9391 hdr->sh_type = SHT_ARM_EXIDX;
9392 hdr->sh_flags |= SHF_LINK_ORDER;
9393 }
9394 return TRUE;
9395 }
9396
9397 /* Handle an ARM specific section when reading an object file. This is
9398 called when bfd_section_from_shdr finds a section with an unknown
9399 type. */
9400
9401 static bfd_boolean
9402 elf32_arm_section_from_shdr (bfd *abfd,
9403 Elf_Internal_Shdr * hdr,
9404 const char *name,
9405 int shindex)
9406 {
9407 /* There ought to be a place to keep ELF backend specific flags, but
9408 at the moment there isn't one. We just keep track of the
9409 sections by their name, instead. Fortunately, the ABI gives
9410 names for all the ARM specific sections, so we will probably get
9411 away with this. */
9412 switch (hdr->sh_type)
9413 {
9414 case SHT_ARM_EXIDX:
9415 case SHT_ARM_PREEMPTMAP:
9416 case SHT_ARM_ATTRIBUTES:
9417 break;
9418
9419 default:
9420 return FALSE;
9421 }
9422
9423 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
9424 return FALSE;
9425
9426 return TRUE;
9427 }
9428
9429 /* A structure used to record a list of sections, independently
9430 of the next and prev fields in the asection structure. */
9431 typedef struct section_list
9432 {
9433 asection * sec;
9434 struct section_list * next;
9435 struct section_list * prev;
9436 }
9437 section_list;
9438
9439 /* Unfortunately we need to keep a list of sections for which
9440 an _arm_elf_section_data structure has been allocated. This
9441 is because it is possible for functions like elf32_arm_write_section
9442 to be called on a section which has had an elf_data_structure
9443 allocated for it (and so the used_by_bfd field is valid) but
9444 for which the ARM extended version of this structure - the
9445 _arm_elf_section_data structure - has not been allocated. */
9446 static section_list * sections_with_arm_elf_section_data = NULL;
9447
9448 static void
9449 record_section_with_arm_elf_section_data (asection * sec)
9450 {
9451 struct section_list * entry;
9452
9453 entry = bfd_malloc (sizeof (* entry));
9454 if (entry == NULL)
9455 return;
9456 entry->sec = sec;
9457 entry->next = sections_with_arm_elf_section_data;
9458 entry->prev = NULL;
9459 if (entry->next != NULL)
9460 entry->next->prev = entry;
9461 sections_with_arm_elf_section_data = entry;
9462 }
9463
9464 static struct section_list *
9465 find_arm_elf_section_entry (asection * sec)
9466 {
9467 struct section_list * entry;
9468 static struct section_list * last_entry = NULL;
9469
9470 /* This is a short cut for the typical case where the sections are added
9471 to the sections_with_arm_elf_section_data list in forward order and
9472 then looked up here in backwards order. This makes a real difference
9473 to the ld-srec/sec64k.exp linker test. */
9474 entry = sections_with_arm_elf_section_data;
9475 if (last_entry != NULL)
9476 {
9477 if (last_entry->sec == sec)
9478 entry = last_entry;
9479 else if (last_entry->next != NULL
9480 && last_entry->next->sec == sec)
9481 entry = last_entry->next;
9482 }
9483
9484 for (; entry; entry = entry->next)
9485 if (entry->sec == sec)
9486 break;
9487
9488 if (entry)
9489 /* Record the entry prior to this one - it is the entry we are most
9490 likely to want to locate next time. Also this way if we have been
9491 called from unrecord_section_with_arm_elf_section_data() we will not
9492 be caching a pointer that is about to be freed. */
9493 last_entry = entry->prev;
9494
9495 return entry;
9496 }
9497
9498 static _arm_elf_section_data *
9499 get_arm_elf_section_data (asection * sec)
9500 {
9501 struct section_list * entry;
9502
9503 entry = find_arm_elf_section_entry (sec);
9504
9505 if (entry)
9506 return elf32_arm_section_data (entry->sec);
9507 else
9508 return NULL;
9509 }
9510
9511 static void
9512 unrecord_section_with_arm_elf_section_data (asection * sec)
9513 {
9514 struct section_list * entry;
9515
9516 entry = find_arm_elf_section_entry (sec);
9517
9518 if (entry)
9519 {
9520 if (entry->prev != NULL)
9521 entry->prev->next = entry->next;
9522 if (entry->next != NULL)
9523 entry->next->prev = entry->prev;
9524 if (entry == sections_with_arm_elf_section_data)
9525 sections_with_arm_elf_section_data = entry->next;
9526 free (entry);
9527 }
9528 }
9529
9530
9531 typedef struct
9532 {
9533 void *finfo;
9534 struct bfd_link_info *info;
9535 asection *sec;
9536 int sec_shndx;
9537 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
9538 asection *, struct elf_link_hash_entry *);
9539 } output_arch_syminfo;
9540
9541 enum map_symbol_type
9542 {
9543 ARM_MAP_ARM,
9544 ARM_MAP_THUMB,
9545 ARM_MAP_DATA
9546 };
9547
9548
9549 /* Output a single PLT mapping symbol. */
9550
9551 static bfd_boolean
9552 elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi,
9553 enum map_symbol_type type,
9554 bfd_vma offset)
9555 {
9556 static const char *names[3] = {"$a", "$t", "$d"};
9557 struct elf32_arm_link_hash_table *htab;
9558 Elf_Internal_Sym sym;
9559
9560 htab = elf32_arm_hash_table (osi->info);
9561 sym.st_value = osi->sec->output_section->vma
9562 + osi->sec->output_offset
9563 + offset;
9564 sym.st_size = 0;
9565 sym.st_other = 0;
9566 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
9567 sym.st_shndx = osi->sec_shndx;
9568 if (!osi->func (osi->finfo, names[type], &sym, osi->sec, NULL))
9569 return FALSE;
9570 return TRUE;
9571 }
9572
9573
9574 /* Output mapping symbols for PLT entries associated with H. */
9575
9576 static bfd_boolean
9577 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
9578 {
9579 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
9580 struct elf32_arm_link_hash_table *htab;
9581 struct elf32_arm_link_hash_entry *eh;
9582 bfd_vma addr;
9583
9584 htab = elf32_arm_hash_table (osi->info);
9585
9586 if (h->root.type == bfd_link_hash_indirect)
9587 return TRUE;
9588
9589 if (h->root.type == bfd_link_hash_warning)
9590 /* When warning symbols are created, they **replace** the "real"
9591 entry in the hash table, thus we never get to see the real
9592 symbol in a hash traversal. So look at it now. */
9593 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9594
9595 if (h->plt.offset == (bfd_vma) -1)
9596 return TRUE;
9597
9598 eh = (struct elf32_arm_link_hash_entry *) h;
9599 addr = h->plt.offset;
9600 if (htab->symbian_p)
9601 {
9602 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9603 return FALSE;
9604 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4))
9605 return FALSE;
9606 }
9607 else if (htab->vxworks_p)
9608 {
9609 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9610 return FALSE;
9611 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8))
9612 return FALSE;
9613 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12))
9614 return FALSE;
9615 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20))
9616 return FALSE;
9617 }
9618 else
9619 {
9620 bfd_signed_vma thumb_refs;
9621
9622 thumb_refs = eh->plt_thumb_refcount;
9623 if (!htab->use_blx)
9624 thumb_refs += eh->plt_maybe_thumb_refcount;
9625
9626 if (thumb_refs > 0)
9627 {
9628 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4))
9629 return FALSE;
9630 }
9631 #ifdef FOUR_WORD_PLT
9632 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9633 return FALSE;
9634 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12))
9635 return FALSE;
9636 #else
9637 /* A three-word PLT with no Thumb thunk contains only Arm code,
9638 so only need to output a mapping symbol for the first PLT entry and
9639 entries with thumb thunks. */
9640 if (thumb_refs > 0 || addr == 20)
9641 {
9642 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9643 return FALSE;
9644 }
9645 #endif
9646 }
9647
9648 return TRUE;
9649 }
9650
9651
9652 /* Output mapping symbols for linker generated sections. */
9653
9654 static bfd_boolean
9655 elf32_arm_output_arch_local_syms (bfd *output_bfd,
9656 struct bfd_link_info *info,
9657 void *finfo, bfd_boolean (*func) (void *, const char *,
9658 Elf_Internal_Sym *,
9659 asection *,
9660 struct elf_link_hash_entry *))
9661 {
9662 output_arch_syminfo osi;
9663 struct elf32_arm_link_hash_table *htab;
9664 bfd_vma offset;
9665 bfd_size_type size;
9666
9667 htab = elf32_arm_hash_table (info);
9668 check_use_blx(htab);
9669
9670 osi.finfo = finfo;
9671 osi.info = info;
9672 osi.func = func;
9673
9674 /* ARM->Thumb glue. */
9675 if (htab->arm_glue_size > 0)
9676 {
9677 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
9678 ARM2THUMB_GLUE_SECTION_NAME);
9679
9680 osi.sec_shndx = _bfd_elf_section_from_bfd_section
9681 (output_bfd, osi.sec->output_section);
9682 if (info->shared || htab->root.is_relocatable_executable
9683 || htab->pic_veneer)
9684 size = ARM2THUMB_PIC_GLUE_SIZE;
9685 else if (htab->use_blx)
9686 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
9687 else
9688 size = ARM2THUMB_STATIC_GLUE_SIZE;
9689
9690 for (offset = 0; offset < htab->arm_glue_size; offset += size)
9691 {
9692 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, offset);
9693 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
9694 }
9695 }
9696
9697 /* Thumb->ARM glue. */
9698 if (htab->thumb_glue_size > 0)
9699 {
9700 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
9701 THUMB2ARM_GLUE_SECTION_NAME);
9702
9703 osi.sec_shndx = _bfd_elf_section_from_bfd_section
9704 (output_bfd, osi.sec->output_section);
9705 size = THUMB2ARM_GLUE_SIZE;
9706
9707 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
9708 {
9709 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_THUMB, offset);
9710 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, offset + 4);
9711 }
9712 }
9713
9714 /* Finally, output mapping symbols for the PLT. */
9715 if (!htab->splt || htab->splt->size == 0)
9716 return TRUE;
9717
9718 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
9719 htab->splt->output_section);
9720 osi.sec = htab->splt;
9721 /* Output mapping symbols for the plt header. SymbianOS does not have a
9722 plt header. */
9723 if (htab->vxworks_p)
9724 {
9725 /* VxWorks shared libraries have no PLT header. */
9726 if (!info->shared)
9727 {
9728 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9729 return FALSE;
9730 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12))
9731 return FALSE;
9732 }
9733 }
9734 else if (!htab->symbian_p)
9735 {
9736 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9737 return FALSE;
9738 #ifndef FOUR_WORD_PLT
9739 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16))
9740 return FALSE;
9741 #endif
9742 }
9743
9744 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
9745 return TRUE;
9746 }
9747
9748 /* Allocate target specific section data. */
9749
9750 static bfd_boolean
9751 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
9752 {
9753 if (!sec->used_by_bfd)
9754 {
9755 _arm_elf_section_data *sdata;
9756 bfd_size_type amt = sizeof (*sdata);
9757
9758 sdata = bfd_zalloc (abfd, amt);
9759 if (sdata == NULL)
9760 return FALSE;
9761 sec->used_by_bfd = sdata;
9762 }
9763
9764 record_section_with_arm_elf_section_data (sec);
9765
9766 return _bfd_elf_new_section_hook (abfd, sec);
9767 }
9768
9769
9770 /* Used to order a list of mapping symbols by address. */
9771
9772 static int
9773 elf32_arm_compare_mapping (const void * a, const void * b)
9774 {
9775 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
9776 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
9777
9778 if (amap->vma > bmap->vma)
9779 return 1;
9780 else if (amap->vma < bmap->vma)
9781 return -1;
9782 else if (amap->type > bmap->type)
9783 /* Ensure results do not depend on the host qsort for objects with
9784 multiple mapping symbols at the same address by sorting on type
9785 after vma. */
9786 return 1;
9787 else if (amap->type < bmap->type)
9788 return -1;
9789 else
9790 return 0;
9791 }
9792
9793
9794 /* Do code byteswapping. Return FALSE afterwards so that the section is
9795 written out as normal. */
9796
9797 static bfd_boolean
9798 elf32_arm_write_section (bfd *output_bfd,
9799 struct bfd_link_info *link_info, asection *sec,
9800 bfd_byte *contents)
9801 {
9802 int mapcount, errcount;
9803 _arm_elf_section_data *arm_data;
9804 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
9805 elf32_arm_section_map *map;
9806 elf32_vfp11_erratum_list *errnode;
9807 bfd_vma ptr;
9808 bfd_vma end;
9809 bfd_vma offset = sec->output_section->vma + sec->output_offset;
9810 bfd_byte tmp;
9811 int i;
9812
9813 /* If this section has not been allocated an _arm_elf_section_data
9814 structure then we cannot record anything. */
9815 arm_data = get_arm_elf_section_data (sec);
9816 if (arm_data == NULL)
9817 return FALSE;
9818
9819 mapcount = arm_data->mapcount;
9820 map = arm_data->map;
9821 errcount = arm_data->erratumcount;
9822
9823 if (errcount != 0)
9824 {
9825 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
9826
9827 for (errnode = arm_data->erratumlist; errnode != 0;
9828 errnode = errnode->next)
9829 {
9830 bfd_vma index = errnode->vma - offset;
9831
9832 switch (errnode->type)
9833 {
9834 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
9835 {
9836 bfd_vma branch_to_veneer;
9837 /* Original condition code of instruction, plus bit mask for
9838 ARM B instruction. */
9839 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
9840 | 0x0a000000;
9841
9842 /* The instruction is before the label. */
9843 index -= 4;
9844
9845 /* Above offset included in -4 below. */
9846 branch_to_veneer = errnode->u.b.veneer->vma
9847 - errnode->vma - 4;
9848
9849 if ((signed) branch_to_veneer < -(1 << 25)
9850 || (signed) branch_to_veneer >= (1 << 25))
9851 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
9852 "range"), output_bfd);
9853
9854 insn |= (branch_to_veneer >> 2) & 0xffffff;
9855 contents[endianflip ^ index] = insn & 0xff;
9856 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
9857 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
9858 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
9859 }
9860 break;
9861
9862 case VFP11_ERRATUM_ARM_VENEER:
9863 {
9864 bfd_vma branch_from_veneer;
9865 unsigned int insn;
9866
9867 /* Take size of veneer into account. */
9868 branch_from_veneer = errnode->u.v.branch->vma
9869 - errnode->vma - 12;
9870
9871 if ((signed) branch_from_veneer < -(1 << 25)
9872 || (signed) branch_from_veneer >= (1 << 25))
9873 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
9874 "range"), output_bfd);
9875
9876 /* Original instruction. */
9877 insn = errnode->u.v.branch->u.b.vfp_insn;
9878 contents[endianflip ^ index] = insn & 0xff;
9879 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
9880 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
9881 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
9882
9883 /* Branch back to insn after original insn. */
9884 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
9885 contents[endianflip ^ (index + 4)] = insn & 0xff;
9886 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
9887 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
9888 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
9889 }
9890 break;
9891
9892 default:
9893 abort ();
9894 }
9895 }
9896 }
9897
9898 if (mapcount == 0)
9899 return FALSE;
9900
9901 if (globals->byteswap_code)
9902 {
9903 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
9904
9905 ptr = map[0].vma;
9906 for (i = 0; i < mapcount; i++)
9907 {
9908 if (i == mapcount - 1)
9909 end = sec->size;
9910 else
9911 end = map[i + 1].vma;
9912
9913 switch (map[i].type)
9914 {
9915 case 'a':
9916 /* Byte swap code words. */
9917 while (ptr + 3 < end)
9918 {
9919 tmp = contents[ptr];
9920 contents[ptr] = contents[ptr + 3];
9921 contents[ptr + 3] = tmp;
9922 tmp = contents[ptr + 1];
9923 contents[ptr + 1] = contents[ptr + 2];
9924 contents[ptr + 2] = tmp;
9925 ptr += 4;
9926 }
9927 break;
9928
9929 case 't':
9930 /* Byte swap code halfwords. */
9931 while (ptr + 1 < end)
9932 {
9933 tmp = contents[ptr];
9934 contents[ptr] = contents[ptr + 1];
9935 contents[ptr + 1] = tmp;
9936 ptr += 2;
9937 }
9938 break;
9939
9940 case 'd':
9941 /* Leave data alone. */
9942 break;
9943 }
9944 ptr = end;
9945 }
9946 }
9947
9948 free (map);
9949 arm_data->mapcount = 0;
9950 arm_data->mapsize = 0;
9951 arm_data->map = NULL;
9952 unrecord_section_with_arm_elf_section_data (sec);
9953
9954 return FALSE;
9955 }
9956
9957 static void
9958 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
9959 asection * sec,
9960 void * ignore ATTRIBUTE_UNUSED)
9961 {
9962 unrecord_section_with_arm_elf_section_data (sec);
9963 }
9964
9965 static bfd_boolean
9966 elf32_arm_close_and_cleanup (bfd * abfd)
9967 {
9968 if (abfd->sections)
9969 bfd_map_over_sections (abfd,
9970 unrecord_section_via_map_over_sections,
9971 NULL);
9972
9973 return _bfd_elf_close_and_cleanup (abfd);
9974 }
9975
9976 static bfd_boolean
9977 elf32_arm_bfd_free_cached_info (bfd * abfd)
9978 {
9979 if (abfd->sections)
9980 bfd_map_over_sections (abfd,
9981 unrecord_section_via_map_over_sections,
9982 NULL);
9983
9984 return _bfd_free_cached_info (abfd);
9985 }
9986
9987 /* Display STT_ARM_TFUNC symbols as functions. */
9988
9989 static void
9990 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
9991 asymbol *asym)
9992 {
9993 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
9994
9995 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
9996 elfsym->symbol.flags |= BSF_FUNCTION;
9997 }
9998
9999
10000 /* Mangle thumb function symbols as we read them in. */
10001
10002 static bfd_boolean
10003 elf32_arm_swap_symbol_in (bfd * abfd,
10004 const void *psrc,
10005 const void *pshn,
10006 Elf_Internal_Sym *dst)
10007 {
10008 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
10009 return FALSE;
10010
10011 /* New EABI objects mark thumb function symbols by setting the low bit of
10012 the address. Turn these into STT_ARM_TFUNC. */
10013 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
10014 && (dst->st_value & 1))
10015 {
10016 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
10017 dst->st_value &= ~(bfd_vma) 1;
10018 }
10019 return TRUE;
10020 }
10021
10022
10023 /* Mangle thumb function symbols as we write them out. */
10024
10025 static void
10026 elf32_arm_swap_symbol_out (bfd *abfd,
10027 const Elf_Internal_Sym *src,
10028 void *cdst,
10029 void *shndx)
10030 {
10031 Elf_Internal_Sym newsym;
10032
10033 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
10034 of the address set, as per the new EABI. We do this unconditionally
10035 because objcopy does not set the elf header flags until after
10036 it writes out the symbol table. */
10037 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
10038 {
10039 newsym = *src;
10040 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
10041 if (newsym.st_shndx != SHN_UNDEF)
10042 {
10043 /* Do this only for defined symbols. At link type, the static
10044 linker will simulate the work of dynamic linker of resolving
10045 symbols and will carry over the thumbness of found symbols to
10046 the output symbol table. It's not clear how it happens, but
10047 the thumbness of undefined symbols can well be different at
10048 runtime, and writing '1' for them will be confusing for users
10049 and possibly for dynamic linker itself.
10050 */
10051 newsym.st_value |= 1;
10052 }
10053
10054 src = &newsym;
10055 }
10056 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
10057 }
10058
10059 /* Add the PT_ARM_EXIDX program header. */
10060
10061 static bfd_boolean
10062 elf32_arm_modify_segment_map (bfd *abfd,
10063 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10064 {
10065 struct elf_segment_map *m;
10066 asection *sec;
10067
10068 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10069 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10070 {
10071 /* If there is already a PT_ARM_EXIDX header, then we do not
10072 want to add another one. This situation arises when running
10073 "strip"; the input binary already has the header. */
10074 m = elf_tdata (abfd)->segment_map;
10075 while (m && m->p_type != PT_ARM_EXIDX)
10076 m = m->next;
10077 if (!m)
10078 {
10079 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
10080 if (m == NULL)
10081 return FALSE;
10082 m->p_type = PT_ARM_EXIDX;
10083 m->count = 1;
10084 m->sections[0] = sec;
10085
10086 m->next = elf_tdata (abfd)->segment_map;
10087 elf_tdata (abfd)->segment_map = m;
10088 }
10089 }
10090
10091 return TRUE;
10092 }
10093
10094 /* We may add a PT_ARM_EXIDX program header. */
10095
10096 static int
10097 elf32_arm_additional_program_headers (bfd *abfd,
10098 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10099 {
10100 asection *sec;
10101
10102 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10103 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10104 return 1;
10105 else
10106 return 0;
10107 }
10108
10109 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
10110 static bfd_boolean
10111 elf32_arm_is_function_type (unsigned int type)
10112 {
10113 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
10114 }
10115
10116 /* We use this to override swap_symbol_in and swap_symbol_out. */
10117 const struct elf_size_info elf32_arm_size_info = {
10118 sizeof (Elf32_External_Ehdr),
10119 sizeof (Elf32_External_Phdr),
10120 sizeof (Elf32_External_Shdr),
10121 sizeof (Elf32_External_Rel),
10122 sizeof (Elf32_External_Rela),
10123 sizeof (Elf32_External_Sym),
10124 sizeof (Elf32_External_Dyn),
10125 sizeof (Elf_External_Note),
10126 4,
10127 1,
10128 32, 2,
10129 ELFCLASS32, EV_CURRENT,
10130 bfd_elf32_write_out_phdrs,
10131 bfd_elf32_write_shdrs_and_ehdr,
10132 bfd_elf32_checksum_contents,
10133 bfd_elf32_write_relocs,
10134 elf32_arm_swap_symbol_in,
10135 elf32_arm_swap_symbol_out,
10136 bfd_elf32_slurp_reloc_table,
10137 bfd_elf32_slurp_symbol_table,
10138 bfd_elf32_swap_dyn_in,
10139 bfd_elf32_swap_dyn_out,
10140 bfd_elf32_swap_reloc_in,
10141 bfd_elf32_swap_reloc_out,
10142 bfd_elf32_swap_reloca_in,
10143 bfd_elf32_swap_reloca_out
10144 };
10145
10146 #define ELF_ARCH bfd_arch_arm
10147 #define ELF_MACHINE_CODE EM_ARM
10148 #ifdef __QNXTARGET__
10149 #define ELF_MAXPAGESIZE 0x1000
10150 #else
10151 #define ELF_MAXPAGESIZE 0x8000
10152 #endif
10153 #define ELF_MINPAGESIZE 0x1000
10154 #define ELF_COMMONPAGESIZE 0x1000
10155
10156 #define bfd_elf32_mkobject elf32_arm_mkobject
10157
10158 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
10159 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
10160 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
10161 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
10162 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
10163 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
10164 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
10165 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
10166 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
10167 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
10168 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
10169 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
10170 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
10171
10172 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
10173 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
10174 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
10175 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
10176 #define elf_backend_check_relocs elf32_arm_check_relocs
10177 #define elf_backend_relocate_section elf32_arm_relocate_section
10178 #define elf_backend_write_section elf32_arm_write_section
10179 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
10180 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
10181 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
10182 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
10183 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
10184 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
10185 #define elf_backend_post_process_headers elf32_arm_post_process_headers
10186 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
10187 #define elf_backend_object_p elf32_arm_object_p
10188 #define elf_backend_section_flags elf32_arm_section_flags
10189 #define elf_backend_fake_sections elf32_arm_fake_sections
10190 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
10191 #define elf_backend_final_write_processing elf32_arm_final_write_processing
10192 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
10193 #define elf_backend_symbol_processing elf32_arm_symbol_processing
10194 #define elf_backend_size_info elf32_arm_size_info
10195 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
10196 #define elf_backend_additional_program_headers \
10197 elf32_arm_additional_program_headers
10198 #define elf_backend_output_arch_local_syms \
10199 elf32_arm_output_arch_local_syms
10200 #define elf_backend_begin_write_processing \
10201 elf32_arm_begin_write_processing
10202 #define elf_backend_is_function_type elf32_arm_is_function_type
10203
10204 #define elf_backend_can_refcount 1
10205 #define elf_backend_can_gc_sections 1
10206 #define elf_backend_plt_readonly 1
10207 #define elf_backend_want_got_plt 1
10208 #define elf_backend_want_plt_sym 0
10209 #define elf_backend_may_use_rel_p 1
10210 #define elf_backend_may_use_rela_p 0
10211 #define elf_backend_default_use_rela_p 0
10212
10213 #define elf_backend_got_header_size 12
10214
10215 #undef elf_backend_obj_attrs_vendor
10216 #define elf_backend_obj_attrs_vendor "aeabi"
10217 #undef elf_backend_obj_attrs_section
10218 #define elf_backend_obj_attrs_section ".ARM.attributes"
10219 #undef elf_backend_obj_attrs_arg_type
10220 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
10221 #undef elf_backend_obj_attrs_section_type
10222 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
10223
10224 #include "elf32-target.h"
10225
10226 /* VxWorks Targets */
10227
10228 #undef TARGET_LITTLE_SYM
10229 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
10230 #undef TARGET_LITTLE_NAME
10231 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
10232 #undef TARGET_BIG_SYM
10233 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
10234 #undef TARGET_BIG_NAME
10235 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
10236
10237 /* Like elf32_arm_link_hash_table_create -- but overrides
10238 appropriately for VxWorks. */
10239 static struct bfd_link_hash_table *
10240 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
10241 {
10242 struct bfd_link_hash_table *ret;
10243
10244 ret = elf32_arm_link_hash_table_create (abfd);
10245 if (ret)
10246 {
10247 struct elf32_arm_link_hash_table *htab
10248 = (struct elf32_arm_link_hash_table *) ret;
10249 htab->use_rel = 0;
10250 htab->vxworks_p = 1;
10251 }
10252 return ret;
10253 }
10254
10255 static void
10256 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10257 {
10258 elf32_arm_final_write_processing (abfd, linker);
10259 elf_vxworks_final_write_processing (abfd, linker);
10260 }
10261
10262 #undef elf32_bed
10263 #define elf32_bed elf32_arm_vxworks_bed
10264
10265 #undef bfd_elf32_bfd_link_hash_table_create
10266 #define bfd_elf32_bfd_link_hash_table_create \
10267 elf32_arm_vxworks_link_hash_table_create
10268 #undef elf_backend_add_symbol_hook
10269 #define elf_backend_add_symbol_hook \
10270 elf_vxworks_add_symbol_hook
10271 #undef elf_backend_final_write_processing
10272 #define elf_backend_final_write_processing \
10273 elf32_arm_vxworks_final_write_processing
10274 #undef elf_backend_emit_relocs
10275 #define elf_backend_emit_relocs \
10276 elf_vxworks_emit_relocs
10277
10278 #undef elf_backend_may_use_rel_p
10279 #define elf_backend_may_use_rel_p 0
10280 #undef elf_backend_may_use_rela_p
10281 #define elf_backend_may_use_rela_p 1
10282 #undef elf_backend_default_use_rela_p
10283 #define elf_backend_default_use_rela_p 1
10284 #undef elf_backend_want_plt_sym
10285 #define elf_backend_want_plt_sym 1
10286 #undef ELF_MAXPAGESIZE
10287 #define ELF_MAXPAGESIZE 0x1000
10288
10289 #include "elf32-target.h"
10290
10291
10292 /* Symbian OS Targets */
10293
10294 #undef TARGET_LITTLE_SYM
10295 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
10296 #undef TARGET_LITTLE_NAME
10297 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
10298 #undef TARGET_BIG_SYM
10299 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
10300 #undef TARGET_BIG_NAME
10301 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
10302
10303 /* Like elf32_arm_link_hash_table_create -- but overrides
10304 appropriately for Symbian OS. */
10305 static struct bfd_link_hash_table *
10306 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
10307 {
10308 struct bfd_link_hash_table *ret;
10309
10310 ret = elf32_arm_link_hash_table_create (abfd);
10311 if (ret)
10312 {
10313 struct elf32_arm_link_hash_table *htab
10314 = (struct elf32_arm_link_hash_table *)ret;
10315 /* There is no PLT header for Symbian OS. */
10316 htab->plt_header_size = 0;
10317 /* The PLT entries are each three instructions. */
10318 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
10319 htab->symbian_p = 1;
10320 /* Symbian uses armv5t or above, so use_blx is always true. */
10321 htab->use_blx = 1;
10322 htab->root.is_relocatable_executable = 1;
10323 }
10324 return ret;
10325 }
10326
10327 static const struct bfd_elf_special_section
10328 elf32_arm_symbian_special_sections[] =
10329 {
10330 /* In a BPABI executable, the dynamic linking sections do not go in
10331 the loadable read-only segment. The post-linker may wish to
10332 refer to these sections, but they are not part of the final
10333 program image. */
10334 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
10335 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
10336 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
10337 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
10338 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
10339 /* These sections do not need to be writable as the SymbianOS
10340 postlinker will arrange things so that no dynamic relocation is
10341 required. */
10342 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
10343 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
10344 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
10345 { NULL, 0, 0, 0, 0 }
10346 };
10347
10348 static void
10349 elf32_arm_symbian_begin_write_processing (bfd *abfd,
10350 struct bfd_link_info *link_info)
10351 {
10352 /* BPABI objects are never loaded directly by an OS kernel; they are
10353 processed by a postlinker first, into an OS-specific format. If
10354 the D_PAGED bit is set on the file, BFD will align segments on
10355 page boundaries, so that an OS can directly map the file. With
10356 BPABI objects, that just results in wasted space. In addition,
10357 because we clear the D_PAGED bit, map_sections_to_segments will
10358 recognize that the program headers should not be mapped into any
10359 loadable segment. */
10360 abfd->flags &= ~D_PAGED;
10361 elf32_arm_begin_write_processing(abfd, link_info);
10362 }
10363
10364 static bfd_boolean
10365 elf32_arm_symbian_modify_segment_map (bfd *abfd,
10366 struct bfd_link_info *info)
10367 {
10368 struct elf_segment_map *m;
10369 asection *dynsec;
10370
10371 /* BPABI shared libraries and executables should have a PT_DYNAMIC
10372 segment. However, because the .dynamic section is not marked
10373 with SEC_LOAD, the generic ELF code will not create such a
10374 segment. */
10375 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
10376 if (dynsec)
10377 {
10378 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
10379 if (m->p_type == PT_DYNAMIC)
10380 break;
10381
10382 if (m == NULL)
10383 {
10384 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
10385 m->next = elf_tdata (abfd)->segment_map;
10386 elf_tdata (abfd)->segment_map = m;
10387 }
10388 }
10389
10390 /* Also call the generic arm routine. */
10391 return elf32_arm_modify_segment_map (abfd, info);
10392 }
10393
10394 #undef elf32_bed
10395 #define elf32_bed elf32_arm_symbian_bed
10396
10397 /* The dynamic sections are not allocated on SymbianOS; the postlinker
10398 will process them and then discard them. */
10399 #undef ELF_DYNAMIC_SEC_FLAGS
10400 #define ELF_DYNAMIC_SEC_FLAGS \
10401 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
10402
10403 #undef bfd_elf32_bfd_link_hash_table_create
10404 #define bfd_elf32_bfd_link_hash_table_create \
10405 elf32_arm_symbian_link_hash_table_create
10406 #undef elf_backend_add_symbol_hook
10407
10408 #undef elf_backend_special_sections
10409 #define elf_backend_special_sections elf32_arm_symbian_special_sections
10410
10411 #undef elf_backend_begin_write_processing
10412 #define elf_backend_begin_write_processing \
10413 elf32_arm_symbian_begin_write_processing
10414 #undef elf_backend_final_write_processing
10415 #define elf_backend_final_write_processing \
10416 elf32_arm_final_write_processing
10417 #undef elf_backend_emit_relocs
10418
10419 #undef elf_backend_modify_segment_map
10420 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
10421
10422 /* There is no .got section for BPABI objects, and hence no header. */
10423 #undef elf_backend_got_header_size
10424 #define elf_backend_got_header_size 0
10425
10426 /* Similarly, there is no .got.plt section. */
10427 #undef elf_backend_want_got_plt
10428 #define elf_backend_want_got_plt 0
10429
10430 #undef elf_backend_may_use_rel_p
10431 #define elf_backend_may_use_rel_p 1
10432 #undef elf_backend_may_use_rela_p
10433 #define elf_backend_may_use_rela_p 0
10434 #undef elf_backend_default_use_rela_p
10435 #define elf_backend_default_use_rela_p 0
10436 #undef elf_backend_want_plt_sym
10437 #define elf_backend_want_plt_sym 0
10438 #undef ELF_MAXPAGESIZE
10439 #define ELF_MAXPAGESIZE 0x8000
10440
10441 #include "elf32-target.h"
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