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bfd/
[binutils.git] / bfd / elf32-arm.c
blobdc784db7bda11823f5114c285912cbcd03535f31
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libiberty.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf-vxworks.h"
27 #include "elf/arm.h"
28
29 #ifndef NUM_ELEM
30 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
31 #endif
32
33 /* Return the relocation section associated with NAME. HTAB is the
34 bfd's elf32_arm_link_hash_entry. */
35 #define RELOC_SECTION(HTAB, NAME) \
36 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
37
38 /* Return size of a relocation entry. HTAB is the bfd's
39 elf32_arm_link_hash_entry. */
40 #define RELOC_SIZE(HTAB) \
41 ((HTAB)->use_rel \
42 ? sizeof (Elf32_External_Rel) \
43 : sizeof (Elf32_External_Rela))
44
45 /* Return function to swap relocations in. HTAB is the bfd's
46 elf32_arm_link_hash_entry. */
47 #define SWAP_RELOC_IN(HTAB) \
48 ((HTAB)->use_rel \
49 ? bfd_elf32_swap_reloc_in \
50 : bfd_elf32_swap_reloca_in)
51
52 /* Return function to swap relocations out. HTAB is the bfd's
53 elf32_arm_link_hash_entry. */
54 #define SWAP_RELOC_OUT(HTAB) \
55 ((HTAB)->use_rel \
56 ? bfd_elf32_swap_reloc_out \
57 : bfd_elf32_swap_reloca_out)
58
59 #define elf_info_to_howto 0
60 #define elf_info_to_howto_rel elf32_arm_info_to_howto
61
62 #define ARM_ELF_ABI_VERSION 0
63 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
64
65 static struct elf_backend_data elf32_arm_vxworks_bed;
66
67 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
68 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
69 in that slot. */
70
71 static reloc_howto_type elf32_arm_howto_table_1[] =
72 {
73 /* No relocation */
74 HOWTO (R_ARM_NONE, /* type */
75 0, /* rightshift */
76 0, /* size (0 = byte, 1 = short, 2 = long) */
77 0, /* bitsize */
78 FALSE, /* pc_relative */
79 0, /* bitpos */
80 complain_overflow_dont,/* complain_on_overflow */
81 bfd_elf_generic_reloc, /* special_function */
82 "R_ARM_NONE", /* name */
83 FALSE, /* partial_inplace */
84 0, /* src_mask */
85 0, /* dst_mask */
86 FALSE), /* pcrel_offset */
87
88 HOWTO (R_ARM_PC24, /* type */
89 2, /* rightshift */
90 2, /* size (0 = byte, 1 = short, 2 = long) */
91 24, /* bitsize */
92 TRUE, /* pc_relative */
93 0, /* bitpos */
94 complain_overflow_signed,/* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_ARM_PC24", /* name */
97 FALSE, /* partial_inplace */
98 0x00ffffff, /* src_mask */
99 0x00ffffff, /* dst_mask */
100 TRUE), /* pcrel_offset */
101
102 /* 32 bit absolute */
103 HOWTO (R_ARM_ABS32, /* type */
104 0, /* rightshift */
105 2, /* size (0 = byte, 1 = short, 2 = long) */
106 32, /* bitsize */
107 FALSE, /* pc_relative */
108 0, /* bitpos */
109 complain_overflow_bitfield,/* complain_on_overflow */
110 bfd_elf_generic_reloc, /* special_function */
111 "R_ARM_ABS32", /* name */
112 FALSE, /* partial_inplace */
113 0xffffffff, /* src_mask */
114 0xffffffff, /* dst_mask */
115 FALSE), /* pcrel_offset */
116
117 /* standard 32bit pc-relative reloc */
118 HOWTO (R_ARM_REL32, /* type */
119 0, /* rightshift */
120 2, /* size (0 = byte, 1 = short, 2 = long) */
121 32, /* bitsize */
122 TRUE, /* pc_relative */
123 0, /* bitpos */
124 complain_overflow_bitfield,/* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_ARM_REL32", /* name */
127 FALSE, /* partial_inplace */
128 0xffffffff, /* src_mask */
129 0xffffffff, /* dst_mask */
130 TRUE), /* pcrel_offset */
131
132 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
133 HOWTO (R_ARM_LDR_PC_G0, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 32, /* bitsize */
137 TRUE, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_dont,/* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_ARM_LDR_PC_G0", /* name */
142 FALSE, /* partial_inplace */
143 0xffffffff, /* src_mask */
144 0xffffffff, /* dst_mask */
145 TRUE), /* pcrel_offset */
146
147 /* 16 bit absolute */
148 HOWTO (R_ARM_ABS16, /* type */
149 0, /* rightshift */
150 1, /* size (0 = byte, 1 = short, 2 = long) */
151 16, /* bitsize */
152 FALSE, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_bitfield,/* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_ARM_ABS16", /* name */
157 FALSE, /* partial_inplace */
158 0x0000ffff, /* src_mask */
159 0x0000ffff, /* dst_mask */
160 FALSE), /* pcrel_offset */
161
162 /* 12 bit absolute */
163 HOWTO (R_ARM_ABS12, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 12, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield,/* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_ARM_ABS12", /* name */
172 FALSE, /* partial_inplace */
173 0x00000fff, /* src_mask */
174 0x00000fff, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 HOWTO (R_ARM_THM_ABS5, /* type */
178 6, /* rightshift */
179 1, /* size (0 = byte, 1 = short, 2 = long) */
180 5, /* bitsize */
181 FALSE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_bitfield,/* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_ARM_THM_ABS5", /* name */
186 FALSE, /* partial_inplace */
187 0x000007e0, /* src_mask */
188 0x000007e0, /* dst_mask */
189 FALSE), /* pcrel_offset */
190
191 /* 8 bit absolute */
192 HOWTO (R_ARM_ABS8, /* type */
193 0, /* rightshift */
194 0, /* size (0 = byte, 1 = short, 2 = long) */
195 8, /* bitsize */
196 FALSE, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_bitfield,/* complain_on_overflow */
199 bfd_elf_generic_reloc, /* special_function */
200 "R_ARM_ABS8", /* name */
201 FALSE, /* partial_inplace */
202 0x000000ff, /* src_mask */
203 0x000000ff, /* dst_mask */
204 FALSE), /* pcrel_offset */
205
206 HOWTO (R_ARM_SBREL32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont,/* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_ARM_SBREL32", /* name */
215 FALSE, /* partial_inplace */
216 0xffffffff, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 HOWTO (R_ARM_THM_CALL, /* type */
221 1, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 25, /* bitsize */
224 TRUE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_signed,/* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_ARM_THM_CALL", /* name */
229 FALSE, /* partial_inplace */
230 0x07ff07ff, /* src_mask */
231 0x07ff07ff, /* dst_mask */
232 TRUE), /* pcrel_offset */
233
234 HOWTO (R_ARM_THM_PC8, /* type */
235 1, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 8, /* bitsize */
238 TRUE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_signed,/* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_ARM_THM_PC8", /* name */
243 FALSE, /* partial_inplace */
244 0x000000ff, /* src_mask */
245 0x000000ff, /* dst_mask */
246 TRUE), /* pcrel_offset */
247
248 HOWTO (R_ARM_BREL_ADJ, /* type */
249 1, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 32, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_signed,/* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_ARM_BREL_ADJ", /* name */
257 FALSE, /* partial_inplace */
258 0xffffffff, /* src_mask */
259 0xffffffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 HOWTO (R_ARM_SWI24, /* type */
263 0, /* rightshift */
264 0, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_signed,/* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_ARM_SWI24", /* name */
271 FALSE, /* partial_inplace */
272 0x00000000, /* src_mask */
273 0x00000000, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 HOWTO (R_ARM_THM_SWI8, /* type */
277 0, /* rightshift */
278 0, /* size (0 = byte, 1 = short, 2 = long) */
279 0, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_signed,/* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_ARM_SWI8", /* name */
285 FALSE, /* partial_inplace */
286 0x00000000, /* src_mask */
287 0x00000000, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* BLX instruction for the ARM. */
291 HOWTO (R_ARM_XPC25, /* type */
292 2, /* rightshift */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
294 25, /* bitsize */
295 TRUE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_signed,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_ARM_XPC25", /* name */
300 FALSE, /* partial_inplace */
301 0x00ffffff, /* src_mask */
302 0x00ffffff, /* dst_mask */
303 TRUE), /* pcrel_offset */
304
305 /* BLX instruction for the Thumb. */
306 HOWTO (R_ARM_THM_XPC22, /* type */
307 2, /* rightshift */
308 2, /* size (0 = byte, 1 = short, 2 = long) */
309 22, /* bitsize */
310 TRUE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_signed,/* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_ARM_THM_XPC22", /* name */
315 FALSE, /* partial_inplace */
316 0x07ff07ff, /* src_mask */
317 0x07ff07ff, /* dst_mask */
318 TRUE), /* pcrel_offset */
319
320 /* Dynamic TLS relocations. */
321
322 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 32, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield,/* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_ARM_TLS_DTPMOD32", /* name */
331 TRUE, /* partial_inplace */
332 0xffffffff, /* src_mask */
333 0xffffffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
337 0, /* rightshift */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
339 32, /* bitsize */
340 FALSE, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_bitfield,/* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_ARM_TLS_DTPOFF32", /* name */
345 TRUE, /* partial_inplace */
346 0xffffffff, /* src_mask */
347 0xffffffff, /* dst_mask */
348 FALSE), /* pcrel_offset */
349
350 HOWTO (R_ARM_TLS_TPOFF32, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 32, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_bitfield,/* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_ARM_TLS_TPOFF32", /* name */
359 TRUE, /* partial_inplace */
360 0xffffffff, /* src_mask */
361 0xffffffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Relocs used in ARM Linux */
365
366 HOWTO (R_ARM_COPY, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 32, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_bitfield,/* complain_on_overflow */
373 bfd_elf_generic_reloc, /* special_function */
374 "R_ARM_COPY", /* name */
375 TRUE, /* partial_inplace */
376 0xffffffff, /* src_mask */
377 0xffffffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 HOWTO (R_ARM_GLOB_DAT, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 32, /* bitsize */
384 FALSE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_bitfield,/* complain_on_overflow */
387 bfd_elf_generic_reloc, /* special_function */
388 "R_ARM_GLOB_DAT", /* name */
389 TRUE, /* partial_inplace */
390 0xffffffff, /* src_mask */
391 0xffffffff, /* dst_mask */
392 FALSE), /* pcrel_offset */
393
394 HOWTO (R_ARM_JUMP_SLOT, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 32, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_bitfield,/* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_ARM_JUMP_SLOT", /* name */
403 TRUE, /* partial_inplace */
404 0xffffffff, /* src_mask */
405 0xffffffff, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 HOWTO (R_ARM_RELATIVE, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 32, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield,/* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_ARM_RELATIVE", /* name */
417 TRUE, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 HOWTO (R_ARM_GOTOFF32, /* type */
423 0, /* rightshift */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
425 32, /* bitsize */
426 FALSE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_bitfield,/* complain_on_overflow */
429 bfd_elf_generic_reloc, /* special_function */
430 "R_ARM_GOTOFF32", /* name */
431 TRUE, /* partial_inplace */
432 0xffffffff, /* src_mask */
433 0xffffffff, /* dst_mask */
434 FALSE), /* pcrel_offset */
435
436 HOWTO (R_ARM_GOTPC, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 32, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_bitfield,/* complain_on_overflow */
443 bfd_elf_generic_reloc, /* special_function */
444 "R_ARM_GOTPC", /* name */
445 TRUE, /* partial_inplace */
446 0xffffffff, /* src_mask */
447 0xffffffff, /* dst_mask */
448 TRUE), /* pcrel_offset */
449
450 HOWTO (R_ARM_GOT32, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 32, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_bitfield,/* complain_on_overflow */
457 bfd_elf_generic_reloc, /* special_function */
458 "R_ARM_GOT32", /* name */
459 TRUE, /* partial_inplace */
460 0xffffffff, /* src_mask */
461 0xffffffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 HOWTO (R_ARM_PLT32, /* type */
465 2, /* rightshift */
466 2, /* size (0 = byte, 1 = short, 2 = long) */
467 24, /* bitsize */
468 TRUE, /* pc_relative */
469 0, /* bitpos */
470 complain_overflow_bitfield,/* complain_on_overflow */
471 bfd_elf_generic_reloc, /* special_function */
472 "R_ARM_PLT32", /* name */
473 FALSE, /* partial_inplace */
474 0x00ffffff, /* src_mask */
475 0x00ffffff, /* dst_mask */
476 TRUE), /* pcrel_offset */
477
478 HOWTO (R_ARM_CALL, /* type */
479 2, /* rightshift */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
481 24, /* bitsize */
482 TRUE, /* pc_relative */
483 0, /* bitpos */
484 complain_overflow_signed,/* complain_on_overflow */
485 bfd_elf_generic_reloc, /* special_function */
486 "R_ARM_CALL", /* name */
487 FALSE, /* partial_inplace */
488 0x00ffffff, /* src_mask */
489 0x00ffffff, /* dst_mask */
490 TRUE), /* pcrel_offset */
491
492 HOWTO (R_ARM_JUMP24, /* type */
493 2, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 24, /* bitsize */
496 TRUE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_signed,/* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_ARM_JUMP24", /* name */
501 FALSE, /* partial_inplace */
502 0x00ffffff, /* src_mask */
503 0x00ffffff, /* dst_mask */
504 TRUE), /* pcrel_offset */
505
506 HOWTO (R_ARM_THM_JUMP24, /* type */
507 1, /* rightshift */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
509 24, /* bitsize */
510 TRUE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_signed,/* complain_on_overflow */
513 bfd_elf_generic_reloc, /* special_function */
514 "R_ARM_THM_JUMP24", /* name */
515 FALSE, /* partial_inplace */
516 0x07ff2fff, /* src_mask */
517 0x07ff2fff, /* dst_mask */
518 TRUE), /* pcrel_offset */
519
520 HOWTO (R_ARM_BASE_ABS, /* type */
521 0, /* rightshift */
522 2, /* size (0 = byte, 1 = short, 2 = long) */
523 32, /* bitsize */
524 FALSE, /* pc_relative */
525 0, /* bitpos */
526 complain_overflow_dont,/* complain_on_overflow */
527 bfd_elf_generic_reloc, /* special_function */
528 "R_ARM_BASE_ABS", /* name */
529 FALSE, /* partial_inplace */
530 0xffffffff, /* src_mask */
531 0xffffffff, /* dst_mask */
532 FALSE), /* pcrel_offset */
533
534 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
535 0, /* rightshift */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
537 12, /* bitsize */
538 TRUE, /* pc_relative */
539 0, /* bitpos */
540 complain_overflow_dont,/* complain_on_overflow */
541 bfd_elf_generic_reloc, /* special_function */
542 "R_ARM_ALU_PCREL_7_0", /* name */
543 FALSE, /* partial_inplace */
544 0x00000fff, /* src_mask */
545 0x00000fff, /* dst_mask */
546 TRUE), /* pcrel_offset */
547
548 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 12, /* bitsize */
552 TRUE, /* pc_relative */
553 8, /* bitpos */
554 complain_overflow_dont,/* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_ARM_ALU_PCREL_15_8",/* name */
557 FALSE, /* partial_inplace */
558 0x00000fff, /* src_mask */
559 0x00000fff, /* dst_mask */
560 TRUE), /* pcrel_offset */
561
562 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
563 0, /* rightshift */
564 2, /* size (0 = byte, 1 = short, 2 = long) */
565 12, /* bitsize */
566 TRUE, /* pc_relative */
567 16, /* bitpos */
568 complain_overflow_dont,/* complain_on_overflow */
569 bfd_elf_generic_reloc, /* special_function */
570 "R_ARM_ALU_PCREL_23_15",/* name */
571 FALSE, /* partial_inplace */
572 0x00000fff, /* src_mask */
573 0x00000fff, /* dst_mask */
574 TRUE), /* pcrel_offset */
575
576 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
577 0, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 12, /* bitsize */
580 FALSE, /* pc_relative */
581 0, /* bitpos */
582 complain_overflow_dont,/* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 "R_ARM_LDR_SBREL_11_0",/* name */
585 FALSE, /* partial_inplace */
586 0x00000fff, /* src_mask */
587 0x00000fff, /* dst_mask */
588 FALSE), /* pcrel_offset */
589
590 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
591 0, /* rightshift */
592 2, /* size (0 = byte, 1 = short, 2 = long) */
593 8, /* bitsize */
594 FALSE, /* pc_relative */
595 12, /* bitpos */
596 complain_overflow_dont,/* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_ARM_ALU_SBREL_19_12",/* name */
599 FALSE, /* partial_inplace */
600 0x000ff000, /* src_mask */
601 0x000ff000, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 8, /* bitsize */
608 FALSE, /* pc_relative */
609 20, /* bitpos */
610 complain_overflow_dont,/* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_ARM_ALU_SBREL_27_20",/* name */
613 FALSE, /* partial_inplace */
614 0x0ff00000, /* src_mask */
615 0x0ff00000, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 HOWTO (R_ARM_TARGET1, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont,/* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_ARM_TARGET1", /* name */
627 FALSE, /* partial_inplace */
628 0xffffffff, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 HOWTO (R_ARM_ROSEGREL32, /* type */
633 0, /* rightshift */
634 2, /* size (0 = byte, 1 = short, 2 = long) */
635 32, /* bitsize */
636 FALSE, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_dont,/* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_ARM_ROSEGREL32", /* name */
641 FALSE, /* partial_inplace */
642 0xffffffff, /* src_mask */
643 0xffffffff, /* dst_mask */
644 FALSE), /* pcrel_offset */
645
646 HOWTO (R_ARM_V4BX, /* type */
647 0, /* rightshift */
648 2, /* size (0 = byte, 1 = short, 2 = long) */
649 32, /* bitsize */
650 FALSE, /* pc_relative */
651 0, /* bitpos */
652 complain_overflow_dont,/* complain_on_overflow */
653 bfd_elf_generic_reloc, /* special_function */
654 "R_ARM_V4BX", /* name */
655 FALSE, /* partial_inplace */
656 0xffffffff, /* src_mask */
657 0xffffffff, /* dst_mask */
658 FALSE), /* pcrel_offset */
659
660 HOWTO (R_ARM_TARGET2, /* type */
661 0, /* rightshift */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
663 32, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_signed,/* complain_on_overflow */
667 bfd_elf_generic_reloc, /* special_function */
668 "R_ARM_TARGET2", /* name */
669 FALSE, /* partial_inplace */
670 0xffffffff, /* src_mask */
671 0xffffffff, /* dst_mask */
672 TRUE), /* pcrel_offset */
673
674 HOWTO (R_ARM_PREL31, /* type */
675 0, /* rightshift */
676 2, /* size (0 = byte, 1 = short, 2 = long) */
677 31, /* bitsize */
678 TRUE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed,/* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_ARM_PREL31", /* name */
683 FALSE, /* partial_inplace */
684 0x7fffffff, /* src_mask */
685 0x7fffffff, /* dst_mask */
686 TRUE), /* pcrel_offset */
687
688 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont,/* complain_on_overflow */
695 bfd_elf_generic_reloc, /* special_function */
696 "R_ARM_MOVW_ABS_NC", /* name */
697 FALSE, /* partial_inplace */
698 0x0000ffff, /* src_mask */
699 0x0000ffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 HOWTO (R_ARM_MOVT_ABS, /* type */
703 0, /* rightshift */
704 2, /* size (0 = byte, 1 = short, 2 = long) */
705 16, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_bitfield,/* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_ARM_MOVT_ABS", /* name */
711 FALSE, /* partial_inplace */
712 0x0000ffff, /* src_mask */
713 0x0000ffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
717 0, /* rightshift */
718 2, /* size (0 = byte, 1 = short, 2 = long) */
719 16, /* bitsize */
720 TRUE, /* pc_relative */
721 0, /* bitpos */
722 complain_overflow_dont,/* complain_on_overflow */
723 bfd_elf_generic_reloc, /* special_function */
724 "R_ARM_MOVW_PREL_NC", /* name */
725 FALSE, /* partial_inplace */
726 0x0000ffff, /* src_mask */
727 0x0000ffff, /* dst_mask */
728 TRUE), /* pcrel_offset */
729
730 HOWTO (R_ARM_MOVT_PREL, /* type */
731 0, /* rightshift */
732 2, /* size (0 = byte, 1 = short, 2 = long) */
733 16, /* bitsize */
734 TRUE, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_bitfield,/* complain_on_overflow */
737 bfd_elf_generic_reloc, /* special_function */
738 "R_ARM_MOVT_PREL", /* name */
739 FALSE, /* partial_inplace */
740 0x0000ffff, /* src_mask */
741 0x0000ffff, /* dst_mask */
742 TRUE), /* pcrel_offset */
743
744 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
745 0, /* rightshift */
746 2, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont,/* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_ARM_THM_MOVW_ABS_NC",/* name */
753 FALSE, /* partial_inplace */
754 0x040f70ff, /* src_mask */
755 0x040f70ff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
759 0, /* rightshift */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
761 16, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_bitfield,/* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_ARM_THM_MOVT_ABS", /* name */
767 FALSE, /* partial_inplace */
768 0x040f70ff, /* src_mask */
769 0x040f70ff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
773 0, /* rightshift */
774 2, /* size (0 = byte, 1 = short, 2 = long) */
775 16, /* bitsize */
776 TRUE, /* pc_relative */
777 0, /* bitpos */
778 complain_overflow_dont,/* complain_on_overflow */
779 bfd_elf_generic_reloc, /* special_function */
780 "R_ARM_THM_MOVW_PREL_NC",/* name */
781 FALSE, /* partial_inplace */
782 0x040f70ff, /* src_mask */
783 0x040f70ff, /* dst_mask */
784 TRUE), /* pcrel_offset */
785
786 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
787 0, /* rightshift */
788 2, /* size (0 = byte, 1 = short, 2 = long) */
789 16, /* bitsize */
790 TRUE, /* pc_relative */
791 0, /* bitpos */
792 complain_overflow_bitfield,/* complain_on_overflow */
793 bfd_elf_generic_reloc, /* special_function */
794 "R_ARM_THM_MOVT_PREL", /* name */
795 FALSE, /* partial_inplace */
796 0x040f70ff, /* src_mask */
797 0x040f70ff, /* dst_mask */
798 TRUE), /* pcrel_offset */
799
800 HOWTO (R_ARM_THM_JUMP19, /* type */
801 1, /* rightshift */
802 2, /* size (0 = byte, 1 = short, 2 = long) */
803 19, /* bitsize */
804 TRUE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_signed,/* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_ARM_THM_JUMP19", /* name */
809 FALSE, /* partial_inplace */
810 0x043f2fff, /* src_mask */
811 0x043f2fff, /* dst_mask */
812 TRUE), /* pcrel_offset */
813
814 HOWTO (R_ARM_THM_JUMP6, /* type */
815 1, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 6, /* bitsize */
818 TRUE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_unsigned,/* complain_on_overflow */
821 bfd_elf_generic_reloc, /* special_function */
822 "R_ARM_THM_JUMP6", /* name */
823 FALSE, /* partial_inplace */
824 0x02f8, /* src_mask */
825 0x02f8, /* dst_mask */
826 TRUE), /* pcrel_offset */
827
828 /* These are declared as 13-bit signed relocations because we can
829 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
830 versa. */
831 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
832 0, /* rightshift */
833 2, /* size (0 = byte, 1 = short, 2 = long) */
834 13, /* bitsize */
835 TRUE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont,/* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_ARM_THM_ALU_PREL_11_0",/* name */
840 FALSE, /* partial_inplace */
841 0xffffffff, /* src_mask */
842 0xffffffff, /* dst_mask */
843 TRUE), /* pcrel_offset */
844
845 HOWTO (R_ARM_THM_PC12, /* type */
846 0, /* rightshift */
847 2, /* size (0 = byte, 1 = short, 2 = long) */
848 13, /* bitsize */
849 TRUE, /* pc_relative */
850 0, /* bitpos */
851 complain_overflow_dont,/* complain_on_overflow */
852 bfd_elf_generic_reloc, /* special_function */
853 "R_ARM_THM_PC12", /* name */
854 FALSE, /* partial_inplace */
855 0xffffffff, /* src_mask */
856 0xffffffff, /* dst_mask */
857 TRUE), /* pcrel_offset */
858
859 HOWTO (R_ARM_ABS32_NOI, /* type */
860 0, /* rightshift */
861 2, /* size (0 = byte, 1 = short, 2 = long) */
862 32, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont,/* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_ARM_ABS32_NOI", /* name */
868 FALSE, /* partial_inplace */
869 0xffffffff, /* src_mask */
870 0xffffffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 HOWTO (R_ARM_REL32_NOI, /* type */
874 0, /* rightshift */
875 2, /* size (0 = byte, 1 = short, 2 = long) */
876 32, /* bitsize */
877 TRUE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_dont,/* complain_on_overflow */
880 bfd_elf_generic_reloc, /* special_function */
881 "R_ARM_REL32_NOI", /* name */
882 FALSE, /* partial_inplace */
883 0xffffffff, /* src_mask */
884 0xffffffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Group relocations. */
888
889 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
890 0, /* rightshift */
891 2, /* size (0 = byte, 1 = short, 2 = long) */
892 32, /* bitsize */
893 TRUE, /* pc_relative */
894 0, /* bitpos */
895 complain_overflow_dont,/* complain_on_overflow */
896 bfd_elf_generic_reloc, /* special_function */
897 "R_ARM_ALU_PC_G0_NC", /* name */
898 FALSE, /* partial_inplace */
899 0xffffffff, /* src_mask */
900 0xffffffff, /* dst_mask */
901 TRUE), /* pcrel_offset */
902
903 HOWTO (R_ARM_ALU_PC_G0, /* type */
904 0, /* rightshift */
905 2, /* size (0 = byte, 1 = short, 2 = long) */
906 32, /* bitsize */
907 TRUE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont,/* complain_on_overflow */
910 bfd_elf_generic_reloc, /* special_function */
911 "R_ARM_ALU_PC_G0", /* name */
912 FALSE, /* partial_inplace */
913 0xffffffff, /* src_mask */
914 0xffffffff, /* dst_mask */
915 TRUE), /* pcrel_offset */
916
917 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
918 0, /* rightshift */
919 2, /* size (0 = byte, 1 = short, 2 = long) */
920 32, /* bitsize */
921 TRUE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont,/* complain_on_overflow */
924 bfd_elf_generic_reloc, /* special_function */
925 "R_ARM_ALU_PC_G1_NC", /* name */
926 FALSE, /* partial_inplace */
927 0xffffffff, /* src_mask */
928 0xffffffff, /* dst_mask */
929 TRUE), /* pcrel_offset */
930
931 HOWTO (R_ARM_ALU_PC_G1, /* type */
932 0, /* rightshift */
933 2, /* size (0 = byte, 1 = short, 2 = long) */
934 32, /* bitsize */
935 TRUE, /* pc_relative */
936 0, /* bitpos */
937 complain_overflow_dont,/* complain_on_overflow */
938 bfd_elf_generic_reloc, /* special_function */
939 "R_ARM_ALU_PC_G1", /* name */
940 FALSE, /* partial_inplace */
941 0xffffffff, /* src_mask */
942 0xffffffff, /* dst_mask */
943 TRUE), /* pcrel_offset */
944
945 HOWTO (R_ARM_ALU_PC_G2, /* type */
946 0, /* rightshift */
947 2, /* size (0 = byte, 1 = short, 2 = long) */
948 32, /* bitsize */
949 TRUE, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_dont,/* complain_on_overflow */
952 bfd_elf_generic_reloc, /* special_function */
953 "R_ARM_ALU_PC_G2", /* name */
954 FALSE, /* partial_inplace */
955 0xffffffff, /* src_mask */
956 0xffffffff, /* dst_mask */
957 TRUE), /* pcrel_offset */
958
959 HOWTO (R_ARM_LDR_PC_G1, /* type */
960 0, /* rightshift */
961 2, /* size (0 = byte, 1 = short, 2 = long) */
962 32, /* bitsize */
963 TRUE, /* pc_relative */
964 0, /* bitpos */
965 complain_overflow_dont,/* complain_on_overflow */
966 bfd_elf_generic_reloc, /* special_function */
967 "R_ARM_LDR_PC_G1", /* name */
968 FALSE, /* partial_inplace */
969 0xffffffff, /* src_mask */
970 0xffffffff, /* dst_mask */
971 TRUE), /* pcrel_offset */
972
973 HOWTO (R_ARM_LDR_PC_G2, /* type */
974 0, /* rightshift */
975 2, /* size (0 = byte, 1 = short, 2 = long) */
976 32, /* bitsize */
977 TRUE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont,/* complain_on_overflow */
980 bfd_elf_generic_reloc, /* special_function */
981 "R_ARM_LDR_PC_G2", /* name */
982 FALSE, /* partial_inplace */
983 0xffffffff, /* src_mask */
984 0xffffffff, /* dst_mask */
985 TRUE), /* pcrel_offset */
986
987 HOWTO (R_ARM_LDRS_PC_G0, /* type */
988 0, /* rightshift */
989 2, /* size (0 = byte, 1 = short, 2 = long) */
990 32, /* bitsize */
991 TRUE, /* pc_relative */
992 0, /* bitpos */
993 complain_overflow_dont,/* complain_on_overflow */
994 bfd_elf_generic_reloc, /* special_function */
995 "R_ARM_LDRS_PC_G0", /* name */
996 FALSE, /* partial_inplace */
997 0xffffffff, /* src_mask */
998 0xffffffff, /* dst_mask */
999 TRUE), /* pcrel_offset */
1000
1001 HOWTO (R_ARM_LDRS_PC_G1, /* type */
1002 0, /* rightshift */
1003 2, /* size (0 = byte, 1 = short, 2 = long) */
1004 32, /* bitsize */
1005 TRUE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_dont,/* complain_on_overflow */
1008 bfd_elf_generic_reloc, /* special_function */
1009 "R_ARM_LDRS_PC_G1", /* name */
1010 FALSE, /* partial_inplace */
1011 0xffffffff, /* src_mask */
1012 0xffffffff, /* dst_mask */
1013 TRUE), /* pcrel_offset */
1014
1015 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1016 0, /* rightshift */
1017 2, /* size (0 = byte, 1 = short, 2 = long) */
1018 32, /* bitsize */
1019 TRUE, /* pc_relative */
1020 0, /* bitpos */
1021 complain_overflow_dont,/* complain_on_overflow */
1022 bfd_elf_generic_reloc, /* special_function */
1023 "R_ARM_LDRS_PC_G2", /* name */
1024 FALSE, /* partial_inplace */
1025 0xffffffff, /* src_mask */
1026 0xffffffff, /* dst_mask */
1027 TRUE), /* pcrel_offset */
1028
1029 HOWTO (R_ARM_LDC_PC_G0, /* type */
1030 0, /* rightshift */
1031 2, /* size (0 = byte, 1 = short, 2 = long) */
1032 32, /* bitsize */
1033 TRUE, /* pc_relative */
1034 0, /* bitpos */
1035 complain_overflow_dont,/* complain_on_overflow */
1036 bfd_elf_generic_reloc, /* special_function */
1037 "R_ARM_LDC_PC_G0", /* name */
1038 FALSE, /* partial_inplace */
1039 0xffffffff, /* src_mask */
1040 0xffffffff, /* dst_mask */
1041 TRUE), /* pcrel_offset */
1042
1043 HOWTO (R_ARM_LDC_PC_G1, /* type */
1044 0, /* rightshift */
1045 2, /* size (0 = byte, 1 = short, 2 = long) */
1046 32, /* bitsize */
1047 TRUE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont,/* complain_on_overflow */
1050 bfd_elf_generic_reloc, /* special_function */
1051 "R_ARM_LDC_PC_G1", /* name */
1052 FALSE, /* partial_inplace */
1053 0xffffffff, /* src_mask */
1054 0xffffffff, /* dst_mask */
1055 TRUE), /* pcrel_offset */
1056
1057 HOWTO (R_ARM_LDC_PC_G2, /* type */
1058 0, /* rightshift */
1059 2, /* size (0 = byte, 1 = short, 2 = long) */
1060 32, /* bitsize */
1061 TRUE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont,/* complain_on_overflow */
1064 bfd_elf_generic_reloc, /* special_function */
1065 "R_ARM_LDC_PC_G2", /* name */
1066 FALSE, /* partial_inplace */
1067 0xffffffff, /* src_mask */
1068 0xffffffff, /* dst_mask */
1069 TRUE), /* pcrel_offset */
1070
1071 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1072 0, /* rightshift */
1073 2, /* size (0 = byte, 1 = short, 2 = long) */
1074 32, /* bitsize */
1075 TRUE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_dont,/* complain_on_overflow */
1078 bfd_elf_generic_reloc, /* special_function */
1079 "R_ARM_ALU_SB_G0_NC", /* name */
1080 FALSE, /* partial_inplace */
1081 0xffffffff, /* src_mask */
1082 0xffffffff, /* dst_mask */
1083 TRUE), /* pcrel_offset */
1084
1085 HOWTO (R_ARM_ALU_SB_G0, /* type */
1086 0, /* rightshift */
1087 2, /* size (0 = byte, 1 = short, 2 = long) */
1088 32, /* bitsize */
1089 TRUE, /* pc_relative */
1090 0, /* bitpos */
1091 complain_overflow_dont,/* complain_on_overflow */
1092 bfd_elf_generic_reloc, /* special_function */
1093 "R_ARM_ALU_SB_G0", /* name */
1094 FALSE, /* partial_inplace */
1095 0xffffffff, /* src_mask */
1096 0xffffffff, /* dst_mask */
1097 TRUE), /* pcrel_offset */
1098
1099 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1100 0, /* rightshift */
1101 2, /* size (0 = byte, 1 = short, 2 = long) */
1102 32, /* bitsize */
1103 TRUE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont,/* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_ARM_ALU_SB_G1_NC", /* name */
1108 FALSE, /* partial_inplace */
1109 0xffffffff, /* src_mask */
1110 0xffffffff, /* dst_mask */
1111 TRUE), /* pcrel_offset */
1112
1113 HOWTO (R_ARM_ALU_SB_G1, /* type */
1114 0, /* rightshift */
1115 2, /* size (0 = byte, 1 = short, 2 = long) */
1116 32, /* bitsize */
1117 TRUE, /* pc_relative */
1118 0, /* bitpos */
1119 complain_overflow_dont,/* complain_on_overflow */
1120 bfd_elf_generic_reloc, /* special_function */
1121 "R_ARM_ALU_SB_G1", /* name */
1122 FALSE, /* partial_inplace */
1123 0xffffffff, /* src_mask */
1124 0xffffffff, /* dst_mask */
1125 TRUE), /* pcrel_offset */
1126
1127 HOWTO (R_ARM_ALU_SB_G2, /* type */
1128 0, /* rightshift */
1129 2, /* size (0 = byte, 1 = short, 2 = long) */
1130 32, /* bitsize */
1131 TRUE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_dont,/* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_ARM_ALU_SB_G2", /* name */
1136 FALSE, /* partial_inplace */
1137 0xffffffff, /* src_mask */
1138 0xffffffff, /* dst_mask */
1139 TRUE), /* pcrel_offset */
1140
1141 HOWTO (R_ARM_LDR_SB_G0, /* type */
1142 0, /* rightshift */
1143 2, /* size (0 = byte, 1 = short, 2 = long) */
1144 32, /* bitsize */
1145 TRUE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont,/* complain_on_overflow */
1148 bfd_elf_generic_reloc, /* special_function */
1149 "R_ARM_LDR_SB_G0", /* name */
1150 FALSE, /* partial_inplace */
1151 0xffffffff, /* src_mask */
1152 0xffffffff, /* dst_mask */
1153 TRUE), /* pcrel_offset */
1154
1155 HOWTO (R_ARM_LDR_SB_G1, /* type */
1156 0, /* rightshift */
1157 2, /* size (0 = byte, 1 = short, 2 = long) */
1158 32, /* bitsize */
1159 TRUE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont,/* complain_on_overflow */
1162 bfd_elf_generic_reloc, /* special_function */
1163 "R_ARM_LDR_SB_G1", /* name */
1164 FALSE, /* partial_inplace */
1165 0xffffffff, /* src_mask */
1166 0xffffffff, /* dst_mask */
1167 TRUE), /* pcrel_offset */
1168
1169 HOWTO (R_ARM_LDR_SB_G2, /* type */
1170 0, /* rightshift */
1171 2, /* size (0 = byte, 1 = short, 2 = long) */
1172 32, /* bitsize */
1173 TRUE, /* pc_relative */
1174 0, /* bitpos */
1175 complain_overflow_dont,/* complain_on_overflow */
1176 bfd_elf_generic_reloc, /* special_function */
1177 "R_ARM_LDR_SB_G2", /* name */
1178 FALSE, /* partial_inplace */
1179 0xffffffff, /* src_mask */
1180 0xffffffff, /* dst_mask */
1181 TRUE), /* pcrel_offset */
1182
1183 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1184 0, /* rightshift */
1185 2, /* size (0 = byte, 1 = short, 2 = long) */
1186 32, /* bitsize */
1187 TRUE, /* pc_relative */
1188 0, /* bitpos */
1189 complain_overflow_dont,/* complain_on_overflow */
1190 bfd_elf_generic_reloc, /* special_function */
1191 "R_ARM_LDRS_SB_G0", /* name */
1192 FALSE, /* partial_inplace */
1193 0xffffffff, /* src_mask */
1194 0xffffffff, /* dst_mask */
1195 TRUE), /* pcrel_offset */
1196
1197 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1198 0, /* rightshift */
1199 2, /* size (0 = byte, 1 = short, 2 = long) */
1200 32, /* bitsize */
1201 TRUE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_dont,/* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_ARM_LDRS_SB_G1", /* name */
1206 FALSE, /* partial_inplace */
1207 0xffffffff, /* src_mask */
1208 0xffffffff, /* dst_mask */
1209 TRUE), /* pcrel_offset */
1210
1211 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1212 0, /* rightshift */
1213 2, /* size (0 = byte, 1 = short, 2 = long) */
1214 32, /* bitsize */
1215 TRUE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_dont,/* complain_on_overflow */
1218 bfd_elf_generic_reloc, /* special_function */
1219 "R_ARM_LDRS_SB_G2", /* name */
1220 FALSE, /* partial_inplace */
1221 0xffffffff, /* src_mask */
1222 0xffffffff, /* dst_mask */
1223 TRUE), /* pcrel_offset */
1224
1225 HOWTO (R_ARM_LDC_SB_G0, /* type */
1226 0, /* rightshift */
1227 2, /* size (0 = byte, 1 = short, 2 = long) */
1228 32, /* bitsize */
1229 TRUE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont,/* complain_on_overflow */
1232 bfd_elf_generic_reloc, /* special_function */
1233 "R_ARM_LDC_SB_G0", /* name */
1234 FALSE, /* partial_inplace */
1235 0xffffffff, /* src_mask */
1236 0xffffffff, /* dst_mask */
1237 TRUE), /* pcrel_offset */
1238
1239 HOWTO (R_ARM_LDC_SB_G1, /* type */
1240 0, /* rightshift */
1241 2, /* size (0 = byte, 1 = short, 2 = long) */
1242 32, /* bitsize */
1243 TRUE, /* pc_relative */
1244 0, /* bitpos */
1245 complain_overflow_dont,/* complain_on_overflow */
1246 bfd_elf_generic_reloc, /* special_function */
1247 "R_ARM_LDC_SB_G1", /* name */
1248 FALSE, /* partial_inplace */
1249 0xffffffff, /* src_mask */
1250 0xffffffff, /* dst_mask */
1251 TRUE), /* pcrel_offset */
1252
1253 HOWTO (R_ARM_LDC_SB_G2, /* type */
1254 0, /* rightshift */
1255 2, /* size (0 = byte, 1 = short, 2 = long) */
1256 32, /* bitsize */
1257 TRUE, /* pc_relative */
1258 0, /* bitpos */
1259 complain_overflow_dont,/* complain_on_overflow */
1260 bfd_elf_generic_reloc, /* special_function */
1261 "R_ARM_LDC_SB_G2", /* name */
1262 FALSE, /* partial_inplace */
1263 0xffffffff, /* src_mask */
1264 0xffffffff, /* dst_mask */
1265 TRUE), /* pcrel_offset */
1266
1267 /* End of group relocations. */
1268
1269 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 16, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont,/* complain_on_overflow */
1276 bfd_elf_generic_reloc, /* special_function */
1277 "R_ARM_MOVW_BREL_NC", /* name */
1278 FALSE, /* partial_inplace */
1279 0x0000ffff, /* src_mask */
1280 0x0000ffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 HOWTO (R_ARM_MOVT_BREL, /* type */
1284 0, /* rightshift */
1285 2, /* size (0 = byte, 1 = short, 2 = long) */
1286 16, /* bitsize */
1287 FALSE, /* pc_relative */
1288 0, /* bitpos */
1289 complain_overflow_bitfield,/* complain_on_overflow */
1290 bfd_elf_generic_reloc, /* special_function */
1291 "R_ARM_MOVT_BREL", /* name */
1292 FALSE, /* partial_inplace */
1293 0x0000ffff, /* src_mask */
1294 0x0000ffff, /* dst_mask */
1295 FALSE), /* pcrel_offset */
1296
1297 HOWTO (R_ARM_MOVW_BREL, /* type */
1298 0, /* rightshift */
1299 2, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont,/* complain_on_overflow */
1304 bfd_elf_generic_reloc, /* special_function */
1305 "R_ARM_MOVW_BREL", /* name */
1306 FALSE, /* partial_inplace */
1307 0x0000ffff, /* src_mask */
1308 0x0000ffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_dont,/* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_ARM_THM_MOVW_BREL_NC",/* name */
1320 FALSE, /* partial_inplace */
1321 0x040f70ff, /* src_mask */
1322 0x040f70ff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1326 0, /* rightshift */
1327 2, /* size (0 = byte, 1 = short, 2 = long) */
1328 16, /* bitsize */
1329 FALSE, /* pc_relative */
1330 0, /* bitpos */
1331 complain_overflow_bitfield,/* complain_on_overflow */
1332 bfd_elf_generic_reloc, /* special_function */
1333 "R_ARM_THM_MOVT_BREL", /* name */
1334 FALSE, /* partial_inplace */
1335 0x040f70ff, /* src_mask */
1336 0x040f70ff, /* dst_mask */
1337 FALSE), /* pcrel_offset */
1338
1339 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1340 0, /* rightshift */
1341 2, /* size (0 = byte, 1 = short, 2 = long) */
1342 16, /* bitsize */
1343 FALSE, /* pc_relative */
1344 0, /* bitpos */
1345 complain_overflow_dont,/* complain_on_overflow */
1346 bfd_elf_generic_reloc, /* special_function */
1347 "R_ARM_THM_MOVW_BREL", /* name */
1348 FALSE, /* partial_inplace */
1349 0x040f70ff, /* src_mask */
1350 0x040f70ff, /* dst_mask */
1351 FALSE), /* pcrel_offset */
1352
1353 EMPTY_HOWTO (90), /* unallocated */
1354 EMPTY_HOWTO (91),
1355 EMPTY_HOWTO (92),
1356 EMPTY_HOWTO (93),
1357
1358 HOWTO (R_ARM_PLT32_ABS, /* type */
1359 0, /* rightshift */
1360 2, /* size (0 = byte, 1 = short, 2 = long) */
1361 32, /* bitsize */
1362 FALSE, /* pc_relative */
1363 0, /* bitpos */
1364 complain_overflow_dont,/* complain_on_overflow */
1365 bfd_elf_generic_reloc, /* special_function */
1366 "R_ARM_PLT32_ABS", /* name */
1367 FALSE, /* partial_inplace */
1368 0xffffffff, /* src_mask */
1369 0xffffffff, /* dst_mask */
1370 FALSE), /* pcrel_offset */
1371
1372 HOWTO (R_ARM_GOT_ABS, /* type */
1373 0, /* rightshift */
1374 2, /* size (0 = byte, 1 = short, 2 = long) */
1375 32, /* bitsize */
1376 FALSE, /* pc_relative */
1377 0, /* bitpos */
1378 complain_overflow_dont,/* complain_on_overflow */
1379 bfd_elf_generic_reloc, /* special_function */
1380 "R_ARM_GOT_ABS", /* name */
1381 FALSE, /* partial_inplace */
1382 0xffffffff, /* src_mask */
1383 0xffffffff, /* dst_mask */
1384 FALSE), /* pcrel_offset */
1385
1386 HOWTO (R_ARM_GOT_PREL, /* type */
1387 0, /* rightshift */
1388 2, /* size (0 = byte, 1 = short, 2 = long) */
1389 32, /* bitsize */
1390 TRUE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 bfd_elf_generic_reloc, /* special_function */
1394 "R_ARM_GOT_PREL", /* name */
1395 FALSE, /* partial_inplace */
1396 0xffffffff, /* src_mask */
1397 0xffffffff, /* dst_mask */
1398 TRUE), /* pcrel_offset */
1399
1400 HOWTO (R_ARM_GOT_BREL12, /* type */
1401 0, /* rightshift */
1402 2, /* size (0 = byte, 1 = short, 2 = long) */
1403 12, /* bitsize */
1404 FALSE, /* pc_relative */
1405 0, /* bitpos */
1406 complain_overflow_bitfield,/* complain_on_overflow */
1407 bfd_elf_generic_reloc, /* special_function */
1408 "R_ARM_GOT_BREL12", /* name */
1409 FALSE, /* partial_inplace */
1410 0x00000fff, /* src_mask */
1411 0x00000fff, /* dst_mask */
1412 FALSE), /* pcrel_offset */
1413
1414 HOWTO (R_ARM_GOTOFF12, /* type */
1415 0, /* rightshift */
1416 2, /* size (0 = byte, 1 = short, 2 = long) */
1417 12, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_bitfield,/* complain_on_overflow */
1421 bfd_elf_generic_reloc, /* special_function */
1422 "R_ARM_GOTOFF12", /* name */
1423 FALSE, /* partial_inplace */
1424 0x00000fff, /* src_mask */
1425 0x00000fff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1429
1430 /* GNU extension to record C++ vtable member usage */
1431 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1432 0, /* rightshift */
1433 2, /* size (0 = byte, 1 = short, 2 = long) */
1434 0, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1439 "R_ARM_GNU_VTENTRY", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* GNU extension to record C++ vtable hierarchy */
1446 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1447 0, /* rightshift */
1448 2, /* size (0 = byte, 1 = short, 2 = long) */
1449 0, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 NULL, /* special_function */
1454 "R_ARM_GNU_VTINHERIT", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 HOWTO (R_ARM_THM_JUMP11, /* type */
1461 1, /* rightshift */
1462 1, /* size (0 = byte, 1 = short, 2 = long) */
1463 11, /* bitsize */
1464 TRUE, /* pc_relative */
1465 0, /* bitpos */
1466 complain_overflow_signed, /* complain_on_overflow */
1467 bfd_elf_generic_reloc, /* special_function */
1468 "R_ARM_THM_JUMP11", /* name */
1469 FALSE, /* partial_inplace */
1470 0x000007ff, /* src_mask */
1471 0x000007ff, /* dst_mask */
1472 TRUE), /* pcrel_offset */
1473
1474 HOWTO (R_ARM_THM_JUMP8, /* type */
1475 1, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 8, /* bitsize */
1478 TRUE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_signed, /* complain_on_overflow */
1481 bfd_elf_generic_reloc, /* special_function */
1482 "R_ARM_THM_JUMP8", /* name */
1483 FALSE, /* partial_inplace */
1484 0x000000ff, /* src_mask */
1485 0x000000ff, /* dst_mask */
1486 TRUE), /* pcrel_offset */
1487
1488 /* TLS relocations */
1489 HOWTO (R_ARM_TLS_GD32, /* type */
1490 0, /* rightshift */
1491 2, /* size (0 = byte, 1 = short, 2 = long) */
1492 32, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_bitfield,/* complain_on_overflow */
1496 NULL, /* special_function */
1497 "R_ARM_TLS_GD32", /* name */
1498 TRUE, /* partial_inplace */
1499 0xffffffff, /* src_mask */
1500 0xffffffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 HOWTO (R_ARM_TLS_LDM32, /* type */
1504 0, /* rightshift */
1505 2, /* size (0 = byte, 1 = short, 2 = long) */
1506 32, /* bitsize */
1507 FALSE, /* pc_relative */
1508 0, /* bitpos */
1509 complain_overflow_bitfield,/* complain_on_overflow */
1510 bfd_elf_generic_reloc, /* special_function */
1511 "R_ARM_TLS_LDM32", /* name */
1512 TRUE, /* partial_inplace */
1513 0xffffffff, /* src_mask */
1514 0xffffffff, /* dst_mask */
1515 FALSE), /* pcrel_offset */
1516
1517 HOWTO (R_ARM_TLS_LDO32, /* type */
1518 0, /* rightshift */
1519 2, /* size (0 = byte, 1 = short, 2 = long) */
1520 32, /* bitsize */
1521 FALSE, /* pc_relative */
1522 0, /* bitpos */
1523 complain_overflow_bitfield,/* complain_on_overflow */
1524 bfd_elf_generic_reloc, /* special_function */
1525 "R_ARM_TLS_LDO32", /* name */
1526 TRUE, /* partial_inplace */
1527 0xffffffff, /* src_mask */
1528 0xffffffff, /* dst_mask */
1529 FALSE), /* pcrel_offset */
1530
1531 HOWTO (R_ARM_TLS_IE32, /* type */
1532 0, /* rightshift */
1533 2, /* size (0 = byte, 1 = short, 2 = long) */
1534 32, /* bitsize */
1535 FALSE, /* pc_relative */
1536 0, /* bitpos */
1537 complain_overflow_bitfield,/* complain_on_overflow */
1538 NULL, /* special_function */
1539 "R_ARM_TLS_IE32", /* name */
1540 TRUE, /* partial_inplace */
1541 0xffffffff, /* src_mask */
1542 0xffffffff, /* dst_mask */
1543 FALSE), /* pcrel_offset */
1544
1545 HOWTO (R_ARM_TLS_LE32, /* type */
1546 0, /* rightshift */
1547 2, /* size (0 = byte, 1 = short, 2 = long) */
1548 32, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_bitfield,/* complain_on_overflow */
1552 bfd_elf_generic_reloc, /* special_function */
1553 "R_ARM_TLS_LE32", /* name */
1554 TRUE, /* partial_inplace */
1555 0xffffffff, /* src_mask */
1556 0xffffffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 HOWTO (R_ARM_TLS_LDO12, /* type */
1560 0, /* rightshift */
1561 2, /* size (0 = byte, 1 = short, 2 = long) */
1562 12, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_bitfield,/* complain_on_overflow */
1566 bfd_elf_generic_reloc, /* special_function */
1567 "R_ARM_TLS_LDO12", /* name */
1568 FALSE, /* partial_inplace */
1569 0x00000fff, /* src_mask */
1570 0x00000fff, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 HOWTO (R_ARM_TLS_LE12, /* type */
1574 0, /* rightshift */
1575 2, /* size (0 = byte, 1 = short, 2 = long) */
1576 12, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_bitfield,/* complain_on_overflow */
1580 bfd_elf_generic_reloc, /* special_function */
1581 "R_ARM_TLS_LE12", /* name */
1582 FALSE, /* partial_inplace */
1583 0x00000fff, /* src_mask */
1584 0x00000fff, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 HOWTO (R_ARM_TLS_IE12GP, /* type */
1588 0, /* rightshift */
1589 2, /* size (0 = byte, 1 = short, 2 = long) */
1590 12, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_bitfield,/* complain_on_overflow */
1594 bfd_elf_generic_reloc, /* special_function */
1595 "R_ARM_TLS_IE12GP", /* name */
1596 FALSE, /* partial_inplace */
1597 0x00000fff, /* src_mask */
1598 0x00000fff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600 };
1601
1602 /* 112-127 private relocations
1603 128 R_ARM_ME_TOO, obsolete
1604 129-255 unallocated in AAELF.
1605
1606 249-255 extended, currently unused, relocations: */
1607
1608 static reloc_howto_type elf32_arm_howto_table_2[4] =
1609 {
1610 HOWTO (R_ARM_RREL32, /* type */
1611 0, /* rightshift */
1612 0, /* size (0 = byte, 1 = short, 2 = long) */
1613 0, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont,/* complain_on_overflow */
1617 bfd_elf_generic_reloc, /* special_function */
1618 "R_ARM_RREL32", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 HOWTO (R_ARM_RABS32, /* type */
1625 0, /* rightshift */
1626 0, /* size (0 = byte, 1 = short, 2 = long) */
1627 0, /* bitsize */
1628 FALSE, /* pc_relative */
1629 0, /* bitpos */
1630 complain_overflow_dont,/* complain_on_overflow */
1631 bfd_elf_generic_reloc, /* special_function */
1632 "R_ARM_RABS32", /* name */
1633 FALSE, /* partial_inplace */
1634 0, /* src_mask */
1635 0, /* dst_mask */
1636 FALSE), /* pcrel_offset */
1637
1638 HOWTO (R_ARM_RPC24, /* type */
1639 0, /* rightshift */
1640 0, /* size (0 = byte, 1 = short, 2 = long) */
1641 0, /* bitsize */
1642 FALSE, /* pc_relative */
1643 0, /* bitpos */
1644 complain_overflow_dont,/* complain_on_overflow */
1645 bfd_elf_generic_reloc, /* special_function */
1646 "R_ARM_RPC24", /* name */
1647 FALSE, /* partial_inplace */
1648 0, /* src_mask */
1649 0, /* dst_mask */
1650 FALSE), /* pcrel_offset */
1651
1652 HOWTO (R_ARM_RBASE, /* type */
1653 0, /* rightshift */
1654 0, /* size (0 = byte, 1 = short, 2 = long) */
1655 0, /* bitsize */
1656 FALSE, /* pc_relative */
1657 0, /* bitpos */
1658 complain_overflow_dont,/* complain_on_overflow */
1659 bfd_elf_generic_reloc, /* special_function */
1660 "R_ARM_RBASE", /* name */
1661 FALSE, /* partial_inplace */
1662 0, /* src_mask */
1663 0, /* dst_mask */
1664 FALSE) /* pcrel_offset */
1665 };
1666
1667 static reloc_howto_type *
1668 elf32_arm_howto_from_type (unsigned int r_type)
1669 {
1670 if (r_type < NUM_ELEM (elf32_arm_howto_table_1))
1671 return &elf32_arm_howto_table_1[r_type];
1672
1673 if (r_type >= R_ARM_RREL32
1674 && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2))
1675 return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32];
1676
1677 return NULL;
1678 }
1679
1680 static void
1681 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1682 Elf_Internal_Rela * elf_reloc)
1683 {
1684 unsigned int r_type;
1685
1686 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1687 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1688 }
1689
1690 struct elf32_arm_reloc_map
1691 {
1692 bfd_reloc_code_real_type bfd_reloc_val;
1693 unsigned char elf_reloc_val;
1694 };
1695
1696 /* All entries in this list must also be present in elf32_arm_howto_table. */
1697 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1698 {
1699 {BFD_RELOC_NONE, R_ARM_NONE},
1700 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1701 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1702 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1703 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1704 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1705 {BFD_RELOC_32, R_ARM_ABS32},
1706 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1707 {BFD_RELOC_8, R_ARM_ABS8},
1708 {BFD_RELOC_16, R_ARM_ABS16},
1709 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1710 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1711 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1712 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1713 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1714 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1715 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1716 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1717 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1718 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1719 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1720 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1721 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1722 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1723 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1724 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1725 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1726 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1727 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1728 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1729 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1730 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1731 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1732 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1733 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1734 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1735 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1736 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1737 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1738 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1739 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1740 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1741 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1742 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1743 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1744 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1745 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1746 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1747 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1748 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1749 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1750 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1751 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1752 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1753 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1754 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1755 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1756 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1757 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1758 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1759 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1760 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1761 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1762 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1763 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1764 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1765 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1766 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1767 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1768 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1769 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1770 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1771 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1772 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1773 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1774 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1775 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2}
1776 };
1777
1778 static reloc_howto_type *
1779 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1780 bfd_reloc_code_real_type code)
1781 {
1782 unsigned int i;
1783 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1784 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1785 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1786
1787 return NULL;
1788 }
1789
1790 /* Support for core dump NOTE sections */
1791 static bfd_boolean
1792 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1793 {
1794 int offset;
1795 size_t size;
1796
1797 switch (note->descsz)
1798 {
1799 default:
1800 return FALSE;
1801
1802 case 148: /* Linux/ARM 32-bit*/
1803 /* pr_cursig */
1804 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1805
1806 /* pr_pid */
1807 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1808
1809 /* pr_reg */
1810 offset = 72;
1811 size = 72;
1812
1813 break;
1814 }
1815
1816 /* Make a ".reg/999" section. */
1817 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1818 size, note->descpos + offset);
1819 }
1820
1821 static bfd_boolean
1822 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1823 {
1824 switch (note->descsz)
1825 {
1826 default:
1827 return FALSE;
1828
1829 case 124: /* Linux/ARM elf_prpsinfo */
1830 elf_tdata (abfd)->core_program
1831 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1832 elf_tdata (abfd)->core_command
1833 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1834 }
1835
1836 /* Note that for some reason, a spurious space is tacked
1837 onto the end of the args in some (at least one anyway)
1838 implementations, so strip it off if it exists. */
1839
1840 {
1841 char *command = elf_tdata (abfd)->core_command;
1842 int n = strlen (command);
1843
1844 if (0 < n && command[n - 1] == ' ')
1845 command[n - 1] = '\0';
1846 }
1847
1848 return TRUE;
1849 }
1850
1851 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1852 #define TARGET_LITTLE_NAME "elf32-littlearm"
1853 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1854 #define TARGET_BIG_NAME "elf32-bigarm"
1855
1856 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1857 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1858
1859 typedef unsigned long int insn32;
1860 typedef unsigned short int insn16;
1861
1862 /* In lieu of proper flags, assume all EABIv4 or later objects are
1863 interworkable. */
1864 #define INTERWORK_FLAG(abfd) \
1865 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1866 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1867
1868 /* The linker script knows the section names for placement.
1869 The entry_names are used to do simple name mangling on the stubs.
1870 Given a function name, and its type, the stub can be found. The
1871 name can be changed. The only requirement is the %s be present. */
1872 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1873 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1874
1875 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1876 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1877
1878 /* The name of the dynamic interpreter. This is put in the .interp
1879 section. */
1880 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1881
1882 #ifdef FOUR_WORD_PLT
1883
1884 /* The first entry in a procedure linkage table looks like
1885 this. It is set up so that any shared library function that is
1886 called before the relocation has been set up calls the dynamic
1887 linker first. */
1888 static const bfd_vma elf32_arm_plt0_entry [] =
1889 {
1890 0xe52de004, /* str lr, [sp, #-4]! */
1891 0xe59fe010, /* ldr lr, [pc, #16] */
1892 0xe08fe00e, /* add lr, pc, lr */
1893 0xe5bef008, /* ldr pc, [lr, #8]! */
1894 };
1895
1896 /* Subsequent entries in a procedure linkage table look like
1897 this. */
1898 static const bfd_vma elf32_arm_plt_entry [] =
1899 {
1900 0xe28fc600, /* add ip, pc, #NN */
1901 0xe28cca00, /* add ip, ip, #NN */
1902 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1903 0x00000000, /* unused */
1904 };
1905
1906 #else
1907
1908 /* The first entry in a procedure linkage table looks like
1909 this. It is set up so that any shared library function that is
1910 called before the relocation has been set up calls the dynamic
1911 linker first. */
1912 static const bfd_vma elf32_arm_plt0_entry [] =
1913 {
1914 0xe52de004, /* str lr, [sp, #-4]! */
1915 0xe59fe004, /* ldr lr, [pc, #4] */
1916 0xe08fe00e, /* add lr, pc, lr */
1917 0xe5bef008, /* ldr pc, [lr, #8]! */
1918 0x00000000, /* &GOT[0] - . */
1919 };
1920
1921 /* Subsequent entries in a procedure linkage table look like
1922 this. */
1923 static const bfd_vma elf32_arm_plt_entry [] =
1924 {
1925 0xe28fc600, /* add ip, pc, #0xNN00000 */
1926 0xe28cca00, /* add ip, ip, #0xNN000 */
1927 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1928 };
1929
1930 #endif
1931
1932 /* The format of the first entry in the procedure linkage table
1933 for a VxWorks executable. */
1934 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1935 {
1936 0xe52dc008, /* str ip,[sp,#-8]! */
1937 0xe59fc000, /* ldr ip,[pc] */
1938 0xe59cf008, /* ldr pc,[ip,#8] */
1939 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1940 };
1941
1942 /* The format of subsequent entries in a VxWorks executable. */
1943 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1944 {
1945 0xe59fc000, /* ldr ip,[pc] */
1946 0xe59cf000, /* ldr pc,[ip] */
1947 0x00000000, /* .long @got */
1948 0xe59fc000, /* ldr ip,[pc] */
1949 0xea000000, /* b _PLT */
1950 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1951 };
1952
1953 /* The format of entries in a VxWorks shared library. */
1954 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1955 {
1956 0xe59fc000, /* ldr ip,[pc] */
1957 0xe79cf009, /* ldr pc,[ip,r9] */
1958 0x00000000, /* .long @got */
1959 0xe59fc000, /* ldr ip,[pc] */
1960 0xe599f008, /* ldr pc,[r9,#8] */
1961 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1962 };
1963
1964 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1965 #define PLT_THUMB_STUB_SIZE 4
1966 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1967 {
1968 0x4778, /* bx pc */
1969 0x46c0 /* nop */
1970 };
1971
1972 /* The entries in a PLT when using a DLL-based target with multiple
1973 address spaces. */
1974 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1975 {
1976 0xe51ff004, /* ldr pc, [pc, #-4] */
1977 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1978 };
1979
1980 /* Used to build a map of a section. This is required for mixed-endian
1981 code/data. */
1982
1983 typedef struct elf32_elf_section_map
1984 {
1985 bfd_vma vma;
1986 char type;
1987 }
1988 elf32_arm_section_map;
1989
1990 typedef struct _arm_elf_section_data
1991 {
1992 struct bfd_elf_section_data elf;
1993 unsigned int mapcount;
1994 elf32_arm_section_map *map;
1995 }
1996 _arm_elf_section_data;
1997
1998 #define elf32_arm_section_data(sec) \
1999 ((_arm_elf_section_data *) elf_section_data (sec))
2000
2001 /* The size of the thread control block. */
2002 #define TCB_SIZE 8
2003
2004 #define NUM_KNOWN_ATTRIBUTES 32
2005
2006 typedef struct aeabi_attribute
2007 {
2008 int type;
2009 unsigned int i;
2010 char *s;
2011 } aeabi_attribute;
2012
2013 typedef struct aeabi_attribute_list
2014 {
2015 struct aeabi_attribute_list *next;
2016 int tag;
2017 aeabi_attribute attr;
2018 } aeabi_attribute_list;
2019
2020 struct elf32_arm_obj_tdata
2021 {
2022 struct elf_obj_tdata root;
2023
2024 /* tls_type for each local got entry. */
2025 char *local_got_tls_type;
2026
2027 aeabi_attribute known_eabi_attributes[NUM_KNOWN_ATTRIBUTES];
2028 aeabi_attribute_list *other_eabi_attributes;
2029 };
2030
2031 #define elf32_arm_tdata(abfd) \
2032 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
2033
2034 #define elf32_arm_local_got_tls_type(abfd) \
2035 (elf32_arm_tdata (abfd)->local_got_tls_type)
2036
2037 static bfd_boolean
2038 elf32_arm_mkobject (bfd *abfd)
2039 {
2040 if (abfd->tdata.any == NULL)
2041 {
2042 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
2043 abfd->tdata.any = bfd_zalloc (abfd, amt);
2044 if (abfd->tdata.any == NULL)
2045 return FALSE;
2046 }
2047 return bfd_elf_mkobject (abfd);
2048 }
2049
2050 /* The ARM linker needs to keep track of the number of relocs that it
2051 decides to copy in check_relocs for each symbol. This is so that
2052 it can discard PC relative relocs if it doesn't need them when
2053 linking with -Bsymbolic. We store the information in a field
2054 extending the regular ELF linker hash table. */
2055
2056 /* This structure keeps track of the number of relocs we have copied
2057 for a given symbol. */
2058 struct elf32_arm_relocs_copied
2059 {
2060 /* Next section. */
2061 struct elf32_arm_relocs_copied * next;
2062 /* A section in dynobj. */
2063 asection * section;
2064 /* Number of relocs copied in this section. */
2065 bfd_size_type count;
2066 /* Number of PC-relative relocs copied in this section. */
2067 bfd_size_type pc_count;
2068 };
2069
2070 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2071
2072 /* Arm ELF linker hash entry. */
2073 struct elf32_arm_link_hash_entry
2074 {
2075 struct elf_link_hash_entry root;
2076
2077 /* Number of PC relative relocs copied for this symbol. */
2078 struct elf32_arm_relocs_copied * relocs_copied;
2079
2080 /* We reference count Thumb references to a PLT entry separately,
2081 so that we can emit the Thumb trampoline only if needed. */
2082 bfd_signed_vma plt_thumb_refcount;
2083
2084 /* Since PLT entries have variable size if the Thumb prologue is
2085 used, we need to record the index into .got.plt instead of
2086 recomputing it from the PLT offset. */
2087 bfd_signed_vma plt_got_offset;
2088
2089 #define GOT_UNKNOWN 0
2090 #define GOT_NORMAL 1
2091 #define GOT_TLS_GD 2
2092 #define GOT_TLS_IE 4
2093 unsigned char tls_type;
2094
2095 /* The symbol marking the real symbol location for exported thumb
2096 symbols with Arm stubs. */
2097 struct elf_link_hash_entry *export_glue;
2098 };
2099
2100 /* Traverse an arm ELF linker hash table. */
2101 #define elf32_arm_link_hash_traverse(table, func, info) \
2102 (elf_link_hash_traverse \
2103 (&(table)->root, \
2104 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2105 (info)))
2106
2107 /* Get the ARM elf linker hash table from a link_info structure. */
2108 #define elf32_arm_hash_table(info) \
2109 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2110
2111 /* ARM ELF linker hash table. */
2112 struct elf32_arm_link_hash_table
2113 {
2114 /* The main hash table. */
2115 struct elf_link_hash_table root;
2116
2117 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2118 bfd_size_type thumb_glue_size;
2119
2120 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2121 bfd_size_type arm_glue_size;
2122
2123 /* An arbitrary input BFD chosen to hold the glue sections. */
2124 bfd * bfd_of_glue_owner;
2125
2126 /* Nonzero to output a BE8 image. */
2127 int byteswap_code;
2128
2129 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2130 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2131 int target1_is_rel;
2132
2133 /* The relocation to use for R_ARM_TARGET2 relocations. */
2134 int target2_reloc;
2135
2136 /* Nonzero to fix BX instructions for ARMv4 targets. */
2137 int fix_v4bx;
2138
2139 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2140 int use_blx;
2141
2142 /* The number of bytes in the initial entry in the PLT. */
2143 bfd_size_type plt_header_size;
2144
2145 /* The number of bytes in the subsequent PLT etries. */
2146 bfd_size_type plt_entry_size;
2147
2148 /* True if the target system is VxWorks. */
2149 int vxworks_p;
2150
2151 /* True if the target system is Symbian OS. */
2152 int symbian_p;
2153
2154 /* True if the target uses REL relocations. */
2155 int use_rel;
2156
2157 /* Short-cuts to get to dynamic linker sections. */
2158 asection *sgot;
2159 asection *sgotplt;
2160 asection *srelgot;
2161 asection *splt;
2162 asection *srelplt;
2163 asection *sdynbss;
2164 asection *srelbss;
2165
2166 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2167 asection *srelplt2;
2168
2169 /* Data for R_ARM_TLS_LDM32 relocations. */
2170 union {
2171 bfd_signed_vma refcount;
2172 bfd_vma offset;
2173 } tls_ldm_got;
2174
2175 /* Small local sym to section mapping cache. */
2176 struct sym_sec_cache sym_sec;
2177
2178 /* For convenience in allocate_dynrelocs. */
2179 bfd * obfd;
2180 };
2181
2182 /* Create an entry in an ARM ELF linker hash table. */
2183
2184 static struct bfd_hash_entry *
2185 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2186 struct bfd_hash_table * table,
2187 const char * string)
2188 {
2189 struct elf32_arm_link_hash_entry * ret =
2190 (struct elf32_arm_link_hash_entry *) entry;
2191
2192 /* Allocate the structure if it has not already been allocated by a
2193 subclass. */
2194 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
2195 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2196 if (ret == NULL)
2197 return (struct bfd_hash_entry *) ret;
2198
2199 /* Call the allocation method of the superclass. */
2200 ret = ((struct elf32_arm_link_hash_entry *)
2201 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2202 table, string));
2203 if (ret != NULL)
2204 {
2205 ret->relocs_copied = NULL;
2206 ret->tls_type = GOT_UNKNOWN;
2207 ret->plt_thumb_refcount = 0;
2208 ret->plt_got_offset = -1;
2209 ret->export_glue = NULL;
2210 }
2211
2212 return (struct bfd_hash_entry *) ret;
2213 }
2214
2215 /* Return true if NAME is the name of the relocation section associated
2216 with S. */
2217
2218 static bfd_boolean
2219 reloc_section_p (struct elf32_arm_link_hash_table *htab,
2220 const char *name, asection *s)
2221 {
2222 if (htab->use_rel)
2223 return CONST_STRNEQ (name, ".rel") && strcmp (s->name, name + 4) == 0;
2224 else
2225 return CONST_STRNEQ (name, ".rela") && strcmp (s->name, name + 5) == 0;
2226 }
2227
2228 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2229 shortcuts to them in our hash table. */
2230
2231 static bfd_boolean
2232 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2233 {
2234 struct elf32_arm_link_hash_table *htab;
2235
2236 htab = elf32_arm_hash_table (info);
2237 /* BPABI objects never have a GOT, or associated sections. */
2238 if (htab->symbian_p)
2239 return TRUE;
2240
2241 if (! _bfd_elf_create_got_section (dynobj, info))
2242 return FALSE;
2243
2244 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2245 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2246 if (!htab->sgot || !htab->sgotplt)
2247 abort ();
2248
2249 htab->srelgot = bfd_make_section_with_flags (dynobj,
2250 RELOC_SECTION (htab, ".got"),
2251 (SEC_ALLOC | SEC_LOAD
2252 | SEC_HAS_CONTENTS
2253 | SEC_IN_MEMORY
2254 | SEC_LINKER_CREATED
2255 | SEC_READONLY));
2256 if (htab->srelgot == NULL
2257 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2258 return FALSE;
2259 return TRUE;
2260 }
2261
2262 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2263 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2264 hash table. */
2265
2266 static bfd_boolean
2267 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2268 {
2269 struct elf32_arm_link_hash_table *htab;
2270
2271 htab = elf32_arm_hash_table (info);
2272 if (!htab->sgot && !create_got_section (dynobj, info))
2273 return FALSE;
2274
2275 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2276 return FALSE;
2277
2278 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2279 htab->srelplt = bfd_get_section_by_name (dynobj,
2280 RELOC_SECTION (htab, ".plt"));
2281 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2282 if (!info->shared)
2283 htab->srelbss = bfd_get_section_by_name (dynobj,
2284 RELOC_SECTION (htab, ".bss"));
2285
2286 if (htab->vxworks_p)
2287 {
2288 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2289 return FALSE;
2290
2291 if (info->shared)
2292 {
2293 htab->plt_header_size = 0;
2294 htab->plt_entry_size
2295 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2296 }
2297 else
2298 {
2299 htab->plt_header_size
2300 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2301 htab->plt_entry_size
2302 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2303 }
2304 }
2305
2306 if (!htab->splt
2307 || !htab->srelplt
2308 || !htab->sdynbss
2309 || (!info->shared && !htab->srelbss))
2310 abort ();
2311
2312 return TRUE;
2313 }
2314
2315 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2316
2317 static void
2318 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2319 struct elf_link_hash_entry *dir,
2320 struct elf_link_hash_entry *ind)
2321 {
2322 struct elf32_arm_link_hash_entry *edir, *eind;
2323
2324 edir = (struct elf32_arm_link_hash_entry *) dir;
2325 eind = (struct elf32_arm_link_hash_entry *) ind;
2326
2327 if (eind->relocs_copied != NULL)
2328 {
2329 if (edir->relocs_copied != NULL)
2330 {
2331 struct elf32_arm_relocs_copied **pp;
2332 struct elf32_arm_relocs_copied *p;
2333
2334 /* Add reloc counts against the indirect sym to the direct sym
2335 list. Merge any entries against the same section. */
2336 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2337 {
2338 struct elf32_arm_relocs_copied *q;
2339
2340 for (q = edir->relocs_copied; q != NULL; q = q->next)
2341 if (q->section == p->section)
2342 {
2343 q->pc_count += p->pc_count;
2344 q->count += p->count;
2345 *pp = p->next;
2346 break;
2347 }
2348 if (q == NULL)
2349 pp = &p->next;
2350 }
2351 *pp = edir->relocs_copied;
2352 }
2353
2354 edir->relocs_copied = eind->relocs_copied;
2355 eind->relocs_copied = NULL;
2356 }
2357
2358 if (ind->root.type == bfd_link_hash_indirect)
2359 {
2360 /* Copy over PLT info. */
2361 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2362 eind->plt_thumb_refcount = 0;
2363
2364 if (dir->got.refcount <= 0)
2365 {
2366 edir->tls_type = eind->tls_type;
2367 eind->tls_type = GOT_UNKNOWN;
2368 }
2369 }
2370
2371 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2372 }
2373
2374 /* Create an ARM elf linker hash table. */
2375
2376 static struct bfd_link_hash_table *
2377 elf32_arm_link_hash_table_create (bfd *abfd)
2378 {
2379 struct elf32_arm_link_hash_table *ret;
2380 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2381
2382 ret = bfd_malloc (amt);
2383 if (ret == NULL)
2384 return NULL;
2385
2386 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2387 elf32_arm_link_hash_newfunc,
2388 sizeof (struct elf32_arm_link_hash_entry)))
2389 {
2390 free (ret);
2391 return NULL;
2392 }
2393
2394 ret->sgot = NULL;
2395 ret->sgotplt = NULL;
2396 ret->srelgot = NULL;
2397 ret->splt = NULL;
2398 ret->srelplt = NULL;
2399 ret->sdynbss = NULL;
2400 ret->srelbss = NULL;
2401 ret->srelplt2 = NULL;
2402 ret->thumb_glue_size = 0;
2403 ret->arm_glue_size = 0;
2404 ret->bfd_of_glue_owner = NULL;
2405 ret->byteswap_code = 0;
2406 ret->target1_is_rel = 0;
2407 ret->target2_reloc = R_ARM_NONE;
2408 #ifdef FOUR_WORD_PLT
2409 ret->plt_header_size = 16;
2410 ret->plt_entry_size = 16;
2411 #else
2412 ret->plt_header_size = 20;
2413 ret->plt_entry_size = 12;
2414 #endif
2415 ret->fix_v4bx = 0;
2416 ret->use_blx = 0;
2417 ret->vxworks_p = 0;
2418 ret->symbian_p = 0;
2419 ret->use_rel = 1;
2420 ret->sym_sec.abfd = NULL;
2421 ret->obfd = abfd;
2422 ret->tls_ldm_got.refcount = 0;
2423
2424 return &ret->root.root;
2425 }
2426
2427 /* Locate the Thumb encoded calling stub for NAME. */
2428
2429 static struct elf_link_hash_entry *
2430 find_thumb_glue (struct bfd_link_info *link_info,
2431 const char *name,
2432 char **error_message)
2433 {
2434 char *tmp_name;
2435 struct elf_link_hash_entry *hash;
2436 struct elf32_arm_link_hash_table *hash_table;
2437
2438 /* We need a pointer to the armelf specific hash table. */
2439 hash_table = elf32_arm_hash_table (link_info);
2440
2441 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2442 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2443
2444 BFD_ASSERT (tmp_name);
2445
2446 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2447
2448 hash = elf_link_hash_lookup
2449 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2450
2451 if (hash == NULL)
2452 asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
2453 tmp_name, name);
2454
2455 free (tmp_name);
2456
2457 return hash;
2458 }
2459
2460 /* Locate the ARM encoded calling stub for NAME. */
2461
2462 static struct elf_link_hash_entry *
2463 find_arm_glue (struct bfd_link_info *link_info,
2464 const char *name,
2465 char **error_message)
2466 {
2467 char *tmp_name;
2468 struct elf_link_hash_entry *myh;
2469 struct elf32_arm_link_hash_table *hash_table;
2470
2471 /* We need a pointer to the elfarm specific hash table. */
2472 hash_table = elf32_arm_hash_table (link_info);
2473
2474 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2475 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2476
2477 BFD_ASSERT (tmp_name);
2478
2479 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2480
2481 myh = elf_link_hash_lookup
2482 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2483
2484 if (myh == NULL)
2485 asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
2486 tmp_name, name);
2487
2488 free (tmp_name);
2489
2490 return myh;
2491 }
2492
2493 /* ARM->Thumb glue (static images):
2494
2495 .arm
2496 __func_from_arm:
2497 ldr r12, __func_addr
2498 bx r12
2499 __func_addr:
2500 .word func @ behave as if you saw a ARM_32 reloc.
2501
2502 (relocatable images)
2503 .arm
2504 __func_from_arm:
2505 ldr r12, __func_offset
2506 add r12, r12, pc
2507 bx r12
2508 __func_offset:
2509 .word func - .
2510 */
2511
2512 #define ARM2THUMB_STATIC_GLUE_SIZE 12
2513 static const insn32 a2t1_ldr_insn = 0xe59fc000;
2514 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
2515 static const insn32 a2t3_func_addr_insn = 0x00000001;
2516
2517 #define ARM2THUMB_PIC_GLUE_SIZE 16
2518 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
2519 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
2520 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
2521
2522 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
2523
2524 .thumb .thumb
2525 .align 2 .align 2
2526 __func_from_thumb: __func_from_thumb:
2527 bx pc push {r6, lr}
2528 nop ldr r6, __func_addr
2529 .arm mov lr, pc
2530 __func_change_to_arm: bx r6
2531 b func .arm
2532 __func_back_to_thumb:
2533 ldmia r13! {r6, lr}
2534 bx lr
2535 __func_addr:
2536 .word func */
2537
2538 #define THUMB2ARM_GLUE_SIZE 8
2539 static const insn16 t2a1_bx_pc_insn = 0x4778;
2540 static const insn16 t2a2_noop_insn = 0x46c0;
2541 static const insn32 t2a3_b_insn = 0xea000000;
2542
2543 #ifndef ELFARM_NABI_C_INCLUDED
2544 bfd_boolean
2545 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
2546 {
2547 asection * s;
2548 bfd_byte * foo;
2549 struct elf32_arm_link_hash_table * globals;
2550
2551 globals = elf32_arm_hash_table (info);
2552
2553 BFD_ASSERT (globals != NULL);
2554
2555 if (globals->arm_glue_size != 0)
2556 {
2557 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2558
2559 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2560 ARM2THUMB_GLUE_SECTION_NAME);
2561
2562 BFD_ASSERT (s != NULL);
2563
2564 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
2565
2566 BFD_ASSERT (s->size == globals->arm_glue_size);
2567 s->contents = foo;
2568 }
2569
2570 if (globals->thumb_glue_size != 0)
2571 {
2572 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2573
2574 s = bfd_get_section_by_name
2575 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2576
2577 BFD_ASSERT (s != NULL);
2578
2579 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
2580
2581 BFD_ASSERT (s->size == globals->thumb_glue_size);
2582 s->contents = foo;
2583 }
2584
2585 return TRUE;
2586 }
2587
2588 /* Allocate space and symbols for calling a Thumb function from Arm mode.
2589 returns the symbol identifying teh stub. */
2590 static struct elf_link_hash_entry *
2591 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
2592 struct elf_link_hash_entry * h)
2593 {
2594 const char * name = h->root.root.string;
2595 asection * s;
2596 char * tmp_name;
2597 struct elf_link_hash_entry * myh;
2598 struct bfd_link_hash_entry * bh;
2599 struct elf32_arm_link_hash_table * globals;
2600 bfd_vma val;
2601 bfd_size_type size;
2602
2603 globals = elf32_arm_hash_table (link_info);
2604
2605 BFD_ASSERT (globals != NULL);
2606 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2607
2608 s = bfd_get_section_by_name
2609 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
2610
2611 BFD_ASSERT (s != NULL);
2612
2613 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2614
2615 BFD_ASSERT (tmp_name);
2616
2617 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2618
2619 myh = elf_link_hash_lookup
2620 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
2621
2622 if (myh != NULL)
2623 {
2624 /* We've already seen this guy. */
2625 free (tmp_name);
2626 return myh;
2627 }
2628
2629 /* The only trick here is using hash_table->arm_glue_size as the value.
2630 Even though the section isn't allocated yet, this is where we will be
2631 putting it. */
2632 bh = NULL;
2633 val = globals->arm_glue_size + 1;
2634 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2635 tmp_name, BSF_GLOBAL, s, val,
2636 NULL, TRUE, FALSE, &bh);
2637
2638 myh = (struct elf_link_hash_entry *) bh;
2639 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2640 myh->forced_local = 1;
2641
2642 free (tmp_name);
2643
2644 if ((link_info->shared || globals->root.is_relocatable_executable))
2645 size = ARM2THUMB_PIC_GLUE_SIZE;
2646 else
2647 size = ARM2THUMB_STATIC_GLUE_SIZE;
2648
2649 s->size += size;
2650 globals->arm_glue_size += size;
2651
2652 return myh;
2653 }
2654
2655 static void
2656 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2657 struct elf_link_hash_entry *h)
2658 {
2659 const char *name = h->root.root.string;
2660 asection *s;
2661 char *tmp_name;
2662 struct elf_link_hash_entry *myh;
2663 struct bfd_link_hash_entry *bh;
2664 struct elf32_arm_link_hash_table *hash_table;
2665 bfd_vma val;
2666
2667 hash_table = elf32_arm_hash_table (link_info);
2668
2669 BFD_ASSERT (hash_table != NULL);
2670 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2671
2672 s = bfd_get_section_by_name
2673 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2674
2675 BFD_ASSERT (s != NULL);
2676
2677 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2678 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2679
2680 BFD_ASSERT (tmp_name);
2681
2682 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2683
2684 myh = elf_link_hash_lookup
2685 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2686
2687 if (myh != NULL)
2688 {
2689 /* We've already seen this guy. */
2690 free (tmp_name);
2691 return;
2692 }
2693
2694 bh = NULL;
2695 val = hash_table->thumb_glue_size + 1;
2696 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2697 tmp_name, BSF_GLOBAL, s, val,
2698 NULL, TRUE, FALSE, &bh);
2699
2700 /* If we mark it 'Thumb', the disassembler will do a better job. */
2701 myh = (struct elf_link_hash_entry *) bh;
2702 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2703 myh->forced_local = 1;
2704
2705 free (tmp_name);
2706
2707 #define CHANGE_TO_ARM "__%s_change_to_arm"
2708 #define BACK_FROM_ARM "__%s_back_from_arm"
2709
2710 /* Allocate another symbol to mark where we switch to Arm mode. */
2711 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2712 + strlen (CHANGE_TO_ARM) + 1);
2713
2714 BFD_ASSERT (tmp_name);
2715
2716 sprintf (tmp_name, CHANGE_TO_ARM, name);
2717
2718 bh = NULL;
2719 val = hash_table->thumb_glue_size + 4,
2720 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2721 tmp_name, BSF_LOCAL, s, val,
2722 NULL, TRUE, FALSE, &bh);
2723
2724 free (tmp_name);
2725
2726 s->size += THUMB2ARM_GLUE_SIZE;
2727 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2728
2729 return;
2730 }
2731
2732 /* Add the glue sections to ABFD. This function is called from the
2733 linker scripts in ld/emultempl/{armelf}.em. */
2734
2735 bfd_boolean
2736 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
2737 struct bfd_link_info *info)
2738 {
2739 flagword flags;
2740 asection *sec;
2741
2742 /* If we are only performing a partial
2743 link do not bother adding the glue. */
2744 if (info->relocatable)
2745 return TRUE;
2746
2747 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
2748
2749 if (sec == NULL)
2750 {
2751 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
2752 will prevent elf_link_input_bfd() from processing the contents
2753 of this section. */
2754 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2755 | SEC_CODE | SEC_READONLY);
2756
2757 sec = bfd_make_section_with_flags (abfd,
2758 ARM2THUMB_GLUE_SECTION_NAME,
2759 flags);
2760
2761 if (sec == NULL
2762 || !bfd_set_section_alignment (abfd, sec, 2))
2763 return FALSE;
2764
2765 /* Set the gc mark to prevent the section from being removed by garbage
2766 collection, despite the fact that no relocs refer to this section. */
2767 sec->gc_mark = 1;
2768 }
2769
2770 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
2771
2772 if (sec == NULL)
2773 {
2774 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2775 | SEC_CODE | SEC_READONLY);
2776
2777 sec = bfd_make_section_with_flags (abfd,
2778 THUMB2ARM_GLUE_SECTION_NAME,
2779 flags);
2780
2781 if (sec == NULL
2782 || !bfd_set_section_alignment (abfd, sec, 2))
2783 return FALSE;
2784
2785 sec->gc_mark = 1;
2786 }
2787
2788 return TRUE;
2789 }
2790
2791 /* Select a BFD to be used to hold the sections used by the glue code.
2792 This function is called from the linker scripts in ld/emultempl/
2793 {armelf/pe}.em */
2794
2795 bfd_boolean
2796 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
2797 {
2798 struct elf32_arm_link_hash_table *globals;
2799
2800 /* If we are only performing a partial link
2801 do not bother getting a bfd to hold the glue. */
2802 if (info->relocatable)
2803 return TRUE;
2804
2805 /* Make sure we don't attach the glue sections to a dynamic object. */
2806 BFD_ASSERT (!(abfd->flags & DYNAMIC));
2807
2808 globals = elf32_arm_hash_table (info);
2809
2810 BFD_ASSERT (globals != NULL);
2811
2812 if (globals->bfd_of_glue_owner != NULL)
2813 return TRUE;
2814
2815 /* Save the bfd for later use. */
2816 globals->bfd_of_glue_owner = abfd;
2817
2818 return TRUE;
2819 }
2820
2821 static void check_use_blx(struct elf32_arm_link_hash_table *globals)
2822 {
2823 if (elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch) > 2)
2824 globals->use_blx = 1;
2825 }
2826
2827 bfd_boolean
2828 bfd_elf32_arm_process_before_allocation (bfd *abfd,
2829 struct bfd_link_info *link_info)
2830 {
2831 Elf_Internal_Shdr *symtab_hdr;
2832 Elf_Internal_Rela *internal_relocs = NULL;
2833 Elf_Internal_Rela *irel, *irelend;
2834 bfd_byte *contents = NULL;
2835
2836 asection *sec;
2837 struct elf32_arm_link_hash_table *globals;
2838
2839 /* If we are only performing a partial link do not bother
2840 to construct any glue. */
2841 if (link_info->relocatable)
2842 return TRUE;
2843
2844 /* Here we have a bfd that is to be included on the link. We have a hook
2845 to do reloc rummaging, before section sizes are nailed down. */
2846 globals = elf32_arm_hash_table (link_info);
2847 check_use_blx (globals);
2848
2849 BFD_ASSERT (globals != NULL);
2850 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2851
2852 if (globals->byteswap_code && !bfd_big_endian (abfd))
2853 {
2854 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
2855 abfd);
2856 return FALSE;
2857 }
2858
2859 /* Rummage around all the relocs and map the glue vectors. */
2860 sec = abfd->sections;
2861
2862 if (sec == NULL)
2863 return TRUE;
2864
2865 for (; sec != NULL; sec = sec->next)
2866 {
2867 if (sec->reloc_count == 0)
2868 continue;
2869
2870 if ((sec->flags & SEC_EXCLUDE) != 0)
2871 continue;
2872
2873 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2874
2875 /* Load the relocs. */
2876 internal_relocs
2877 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
2878 (Elf_Internal_Rela *) NULL, FALSE);
2879
2880 if (internal_relocs == NULL)
2881 goto error_return;
2882
2883 irelend = internal_relocs + sec->reloc_count;
2884 for (irel = internal_relocs; irel < irelend; irel++)
2885 {
2886 long r_type;
2887 unsigned long r_index;
2888
2889 struct elf_link_hash_entry *h;
2890
2891 r_type = ELF32_R_TYPE (irel->r_info);
2892 r_index = ELF32_R_SYM (irel->r_info);
2893
2894 /* These are the only relocation types we care about. */
2895 if ( r_type != R_ARM_PC24
2896 && r_type != R_ARM_PLT32
2897 && r_type != R_ARM_CALL
2898 && r_type != R_ARM_JUMP24
2899 && r_type != R_ARM_THM_CALL)
2900 continue;
2901
2902 /* Get the section contents if we haven't done so already. */
2903 if (contents == NULL)
2904 {
2905 /* Get cached copy if it exists. */
2906 if (elf_section_data (sec)->this_hdr.contents != NULL)
2907 contents = elf_section_data (sec)->this_hdr.contents;
2908 else
2909 {
2910 /* Go get them off disk. */
2911 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2912 goto error_return;
2913 }
2914 }
2915
2916 /* If the relocation is not against a symbol it cannot concern us. */
2917 h = NULL;
2918
2919 /* We don't care about local symbols. */
2920 if (r_index < symtab_hdr->sh_info)
2921 continue;
2922
2923 /* This is an external symbol. */
2924 r_index -= symtab_hdr->sh_info;
2925 h = (struct elf_link_hash_entry *)
2926 elf_sym_hashes (abfd)[r_index];
2927
2928 /* If the relocation is against a static symbol it must be within
2929 the current section and so cannot be a cross ARM/Thumb relocation. */
2930 if (h == NULL)
2931 continue;
2932
2933 /* If the call will go through a PLT entry then we do not need
2934 glue. */
2935 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
2936 continue;
2937
2938 switch (r_type)
2939 {
2940 case R_ARM_PC24:
2941 case R_ARM_PLT32:
2942 case R_ARM_CALL:
2943 case R_ARM_JUMP24:
2944 /* This one is a call from arm code. We need to look up
2945 the target of the call. If it is a thumb target, we
2946 insert glue. */
2947 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
2948 && !(r_type == R_ARM_CALL && globals->use_blx))
2949 record_arm_to_thumb_glue (link_info, h);
2950 break;
2951
2952 case R_ARM_THM_CALL:
2953 /* This one is a call from thumb code. We look
2954 up the target of the call. If it is not a thumb
2955 target, we insert glue. */
2956 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC && !globals->use_blx)
2957 record_thumb_to_arm_glue (link_info, h);
2958 break;
2959
2960 default:
2961 abort ();
2962 }
2963 }
2964
2965 if (contents != NULL
2966 && elf_section_data (sec)->this_hdr.contents != contents)
2967 free (contents);
2968 contents = NULL;
2969
2970 if (internal_relocs != NULL
2971 && elf_section_data (sec)->relocs != internal_relocs)
2972 free (internal_relocs);
2973 internal_relocs = NULL;
2974 }
2975
2976 return TRUE;
2977
2978 error_return:
2979 if (contents != NULL
2980 && elf_section_data (sec)->this_hdr.contents != contents)
2981 free (contents);
2982 if (internal_relocs != NULL
2983 && elf_section_data (sec)->relocs != internal_relocs)
2984 free (internal_relocs);
2985
2986 return FALSE;
2987 }
2988 #endif
2989
2990
2991 /* Set target relocation values needed during linking. */
2992
2993 void
2994 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
2995 int target1_is_rel,
2996 char * target2_type,
2997 int fix_v4bx,
2998 int use_blx)
2999 {
3000 struct elf32_arm_link_hash_table *globals;
3001
3002 globals = elf32_arm_hash_table (link_info);
3003
3004 globals->target1_is_rel = target1_is_rel;
3005 if (strcmp (target2_type, "rel") == 0)
3006 globals->target2_reloc = R_ARM_REL32;
3007 else if (strcmp (target2_type, "abs") == 0)
3008 globals->target2_reloc = R_ARM_ABS32;
3009 else if (strcmp (target2_type, "got-rel") == 0)
3010 globals->target2_reloc = R_ARM_GOT_PREL;
3011 else
3012 {
3013 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
3014 target2_type);
3015 }
3016 globals->fix_v4bx = fix_v4bx;
3017 globals->use_blx |= use_blx;
3018 }
3019
3020 /* The thumb form of a long branch is a bit finicky, because the offset
3021 encoding is split over two fields, each in it's own instruction. They
3022 can occur in any order. So given a thumb form of long branch, and an
3023 offset, insert the offset into the thumb branch and return finished
3024 instruction.
3025
3026 It takes two thumb instructions to encode the target address. Each has
3027 11 bits to invest. The upper 11 bits are stored in one (identified by
3028 H-0.. see below), the lower 11 bits are stored in the other (identified
3029 by H-1).
3030
3031 Combine together and shifted left by 1 (it's a half word address) and
3032 there you have it.
3033
3034 Op: 1111 = F,
3035 H-0, upper address-0 = 000
3036 Op: 1111 = F,
3037 H-1, lower address-0 = 800
3038
3039 They can be ordered either way, but the arm tools I've seen always put
3040 the lower one first. It probably doesn't matter. krk@cygnus.com
3041
3042 XXX: Actually the order does matter. The second instruction (H-1)
3043 moves the computed address into the PC, so it must be the second one
3044 in the sequence. The problem, however is that whilst little endian code
3045 stores the instructions in HI then LOW order, big endian code does the
3046 reverse. nickc@cygnus.com. */
3047
3048 #define LOW_HI_ORDER 0xF800F000
3049 #define HI_LOW_ORDER 0xF000F800
3050
3051 static insn32
3052 insert_thumb_branch (insn32 br_insn, int rel_off)
3053 {
3054 unsigned int low_bits;
3055 unsigned int high_bits;
3056
3057 BFD_ASSERT ((rel_off & 1) != 1);
3058
3059 rel_off >>= 1; /* Half word aligned address. */
3060 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
3061 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
3062
3063 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
3064 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
3065 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
3066 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
3067 else
3068 /* FIXME: abort is probably not the right call. krk@cygnus.com */
3069 abort (); /* Error - not a valid branch instruction form. */
3070
3071 return br_insn;
3072 }
3073
3074
3075 /* Store an Arm insn into an output section not processed by
3076 elf32_arm_write_section. */
3077
3078 static void
3079 put_arm_insn (struct elf32_arm_link_hash_table *htab,
3080 bfd * output_bfd, bfd_vma val, void * ptr)
3081 {
3082 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3083 bfd_putl32 (val, ptr);
3084 else
3085 bfd_putb32 (val, ptr);
3086 }
3087
3088
3089 /* Store a 16-bit Thumb insn into an output section not processed by
3090 elf32_arm_write_section. */
3091
3092 static void
3093 put_thumb_insn (struct elf32_arm_link_hash_table *htab,
3094 bfd * output_bfd, bfd_vma val, void * ptr)
3095 {
3096 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3097 bfd_putl16 (val, ptr);
3098 else
3099 bfd_putb16 (val, ptr);
3100 }
3101
3102
3103 /* Thumb code calling an ARM function. */
3104
3105 static int
3106 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
3107 const char * name,
3108 bfd * input_bfd,
3109 bfd * output_bfd,
3110 asection * input_section,
3111 bfd_byte * hit_data,
3112 asection * sym_sec,
3113 bfd_vma offset,
3114 bfd_signed_vma addend,
3115 bfd_vma val,
3116 char **error_message)
3117 {
3118 asection * s = 0;
3119 bfd_vma my_offset;
3120 unsigned long int tmp;
3121 long int ret_offset;
3122 struct elf_link_hash_entry * myh;
3123 struct elf32_arm_link_hash_table * globals;
3124
3125 myh = find_thumb_glue (info, name, error_message);
3126 if (myh == NULL)
3127 return FALSE;
3128
3129 globals = elf32_arm_hash_table (info);
3130
3131 BFD_ASSERT (globals != NULL);
3132 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3133
3134 my_offset = myh->root.u.def.value;
3135
3136 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
3137 THUMB2ARM_GLUE_SECTION_NAME);
3138
3139 BFD_ASSERT (s != NULL);
3140 BFD_ASSERT (s->contents != NULL);
3141 BFD_ASSERT (s->output_section != NULL);
3142
3143 if ((my_offset & 0x01) == 0x01)
3144 {
3145 if (sym_sec != NULL
3146 && sym_sec->owner != NULL
3147 && !INTERWORK_FLAG (sym_sec->owner))
3148 {
3149 (*_bfd_error_handler)
3150 (_("%B(%s): warning: interworking not enabled.\n"
3151 " first occurrence: %B: thumb call to arm"),
3152 sym_sec->owner, input_bfd, name);
3153
3154 return FALSE;
3155 }
3156
3157 --my_offset;
3158 myh->root.u.def.value = my_offset;
3159
3160 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
3161 s->contents + my_offset);
3162
3163 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
3164 s->contents + my_offset + 2);
3165
3166 ret_offset =
3167 /* Address of destination of the stub. */
3168 ((bfd_signed_vma) val)
3169 - ((bfd_signed_vma)
3170 /* Offset from the start of the current section
3171 to the start of the stubs. */
3172 (s->output_offset
3173 /* Offset of the start of this stub from the start of the stubs. */
3174 + my_offset
3175 /* Address of the start of the current section. */
3176 + s->output_section->vma)
3177 /* The branch instruction is 4 bytes into the stub. */
3178 + 4
3179 /* ARM branches work from the pc of the instruction + 8. */
3180 + 8);
3181
3182 put_arm_insn (globals, output_bfd,
3183 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
3184 s->contents + my_offset + 4);
3185 }
3186
3187 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
3188
3189 /* Now go back and fix up the original BL insn to point to here. */
3190 ret_offset =
3191 /* Address of where the stub is located. */
3192 (s->output_section->vma + s->output_offset + my_offset)
3193 /* Address of where the BL is located. */
3194 - (input_section->output_section->vma + input_section->output_offset
3195 + offset)
3196 /* Addend in the relocation. */
3197 - addend
3198 /* Biassing for PC-relative addressing. */
3199 - 8;
3200
3201 tmp = bfd_get_32 (input_bfd, hit_data
3202 - input_section->vma);
3203
3204 bfd_put_32 (output_bfd,
3205 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
3206 hit_data - input_section->vma);
3207
3208 return TRUE;
3209 }
3210
3211 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
3212
3213 static struct elf_link_hash_entry *
3214 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
3215 const char * name,
3216 bfd * input_bfd,
3217 bfd * output_bfd,
3218 asection * sym_sec,
3219 bfd_vma val,
3220 asection *s,
3221 char **error_message)
3222 {
3223 bfd_vma my_offset;
3224 long int ret_offset;
3225 struct elf_link_hash_entry * myh;
3226 struct elf32_arm_link_hash_table * globals;
3227
3228 myh = find_arm_glue (info, name, error_message);
3229 if (myh == NULL)
3230 return NULL;
3231
3232 globals = elf32_arm_hash_table (info);
3233
3234 BFD_ASSERT (globals != NULL);
3235 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3236
3237 my_offset = myh->root.u.def.value;
3238
3239 if ((my_offset & 0x01) == 0x01)
3240 {
3241 if (sym_sec != NULL
3242 && sym_sec->owner != NULL
3243 && !INTERWORK_FLAG (sym_sec->owner))
3244 {
3245 (*_bfd_error_handler)
3246 (_("%B(%s): warning: interworking not enabled.\n"
3247 " first occurrence: %B: arm call to thumb"),
3248 sym_sec->owner, input_bfd, name);
3249 }
3250
3251 --my_offset;
3252 myh->root.u.def.value = my_offset;
3253
3254 if ((info->shared || globals->root.is_relocatable_executable))
3255 {
3256 /* For relocatable objects we can't use absolute addresses,
3257 so construct the address from a relative offset. */
3258 /* TODO: If the offset is small it's probably worth
3259 constructing the address with adds. */
3260 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
3261 s->contents + my_offset);
3262 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
3263 s->contents + my_offset + 4);
3264 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
3265 s->contents + my_offset + 8);
3266 /* Adjust the offset by 4 for the position of the add,
3267 and 8 for the pipeline offset. */
3268 ret_offset = (val - (s->output_offset
3269 + s->output_section->vma
3270 + my_offset + 12))
3271 | 1;
3272 bfd_put_32 (output_bfd, ret_offset,
3273 s->contents + my_offset + 12);
3274 }
3275 else
3276 {
3277 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
3278 s->contents + my_offset);
3279
3280 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
3281 s->contents + my_offset + 4);
3282
3283 /* It's a thumb address. Add the low order bit. */
3284 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
3285 s->contents + my_offset + 8);
3286 }
3287 }
3288
3289 BFD_ASSERT (my_offset <= globals->arm_glue_size);
3290
3291 return myh;
3292 }
3293
3294 /* Arm code calling a Thumb function. */
3295
3296 static int
3297 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
3298 const char * name,
3299 bfd * input_bfd,
3300 bfd * output_bfd,
3301 asection * input_section,
3302 bfd_byte * hit_data,
3303 asection * sym_sec,
3304 bfd_vma offset,
3305 bfd_signed_vma addend,
3306 bfd_vma val,
3307 char **error_message)
3308 {
3309 unsigned long int tmp;
3310 bfd_vma my_offset;
3311 asection * s;
3312 long int ret_offset;
3313 struct elf_link_hash_entry * myh;
3314 struct elf32_arm_link_hash_table * globals;
3315
3316 globals = elf32_arm_hash_table (info);
3317
3318 BFD_ASSERT (globals != NULL);
3319 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3320
3321 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
3322 ARM2THUMB_GLUE_SECTION_NAME);
3323 BFD_ASSERT (s != NULL);
3324 BFD_ASSERT (s->contents != NULL);
3325 BFD_ASSERT (s->output_section != NULL);
3326
3327 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
3328 sym_sec, val, s, error_message);
3329 if (!myh)
3330 return FALSE;
3331
3332 my_offset = myh->root.u.def.value;
3333 tmp = bfd_get_32 (input_bfd, hit_data);
3334 tmp = tmp & 0xFF000000;
3335
3336 /* Somehow these are both 4 too far, so subtract 8. */
3337 ret_offset = (s->output_offset
3338 + my_offset
3339 + s->output_section->vma
3340 - (input_section->output_offset
3341 + input_section->output_section->vma
3342 + offset + addend)
3343 - 8);
3344
3345 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
3346
3347 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
3348
3349 return TRUE;
3350 }
3351
3352 /* Populate Arm stub for an exported Thumb function. */
3353
3354 static bfd_boolean
3355 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
3356 {
3357 struct bfd_link_info * info = (struct bfd_link_info *) inf;
3358 asection * s;
3359 struct elf_link_hash_entry * myh;
3360 struct elf32_arm_link_hash_entry *eh;
3361 struct elf32_arm_link_hash_table * globals;
3362 asection *sec;
3363 bfd_vma val;
3364 char *error_message;
3365
3366 eh = elf32_arm_hash_entry(h);
3367 /* Allocate stubs for exported Thumb functions on v4t. */
3368 if (eh->export_glue == NULL)
3369 return TRUE;
3370
3371 globals = elf32_arm_hash_table (info);
3372
3373 BFD_ASSERT (globals != NULL);
3374 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3375
3376 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
3377 ARM2THUMB_GLUE_SECTION_NAME);
3378 BFD_ASSERT (s != NULL);
3379 BFD_ASSERT (s->contents != NULL);
3380 BFD_ASSERT (s->output_section != NULL);
3381
3382 sec = eh->export_glue->root.u.def.section;
3383 val = eh->export_glue->root.u.def.value + sec->output_offset
3384 + sec->output_section->vma;
3385 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
3386 h->root.u.def.section->owner,
3387 globals->obfd, sec, val, s,
3388 &error_message);
3389 BFD_ASSERT (myh);
3390 return TRUE;
3391 }
3392
3393 /* Generate Arm stubs for exported Thumb symbols. */
3394 static void
3395 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
3396 struct bfd_link_info *link_info)
3397 {
3398 struct elf32_arm_link_hash_table * globals;
3399
3400 if (!link_info)
3401 return;
3402
3403 globals = elf32_arm_hash_table (link_info);
3404 /* If blx is available then exported Thumb symbols are OK and there is
3405 nothing to do. */
3406 if (globals->use_blx)
3407 return;
3408
3409 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
3410 link_info);
3411 }
3412
3413 /* Some relocations map to different relocations depending on the
3414 target. Return the real relocation. */
3415 static int
3416 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
3417 int r_type)
3418 {
3419 switch (r_type)
3420 {
3421 case R_ARM_TARGET1:
3422 if (globals->target1_is_rel)
3423 return R_ARM_REL32;
3424 else
3425 return R_ARM_ABS32;
3426
3427 case R_ARM_TARGET2:
3428 return globals->target2_reloc;
3429
3430 default:
3431 return r_type;
3432 }
3433 }
3434
3435 /* Return the base VMA address which should be subtracted from real addresses
3436 when resolving @dtpoff relocation.
3437 This is PT_TLS segment p_vaddr. */
3438
3439 static bfd_vma
3440 dtpoff_base (struct bfd_link_info *info)
3441 {
3442 /* If tls_sec is NULL, we should have signalled an error already. */
3443 if (elf_hash_table (info)->tls_sec == NULL)
3444 return 0;
3445 return elf_hash_table (info)->tls_sec->vma;
3446 }
3447
3448 /* Return the relocation value for @tpoff relocation
3449 if STT_TLS virtual address is ADDRESS. */
3450
3451 static bfd_vma
3452 tpoff (struct bfd_link_info *info, bfd_vma address)
3453 {
3454 struct elf_link_hash_table *htab = elf_hash_table (info);
3455 bfd_vma base;
3456
3457 /* If tls_sec is NULL, we should have signalled an error already. */
3458 if (htab->tls_sec == NULL)
3459 return 0;
3460 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
3461 return address - htab->tls_sec->vma + base;
3462 }
3463
3464 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
3465 VALUE is the relocation value. */
3466
3467 static bfd_reloc_status_type
3468 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
3469 {
3470 if (value > 0xfff)
3471 return bfd_reloc_overflow;
3472
3473 value |= bfd_get_32 (abfd, data) & 0xfffff000;
3474 bfd_put_32 (abfd, value, data);
3475 return bfd_reloc_ok;
3476 }
3477
3478 /* For a given value of n, calculate the value of G_n as required to
3479 deal with group relocations. We return it in the form of an
3480 encoded constant-and-rotation, together with the final residual. If n is
3481 specified as less than zero, then final_residual is filled with the
3482 input value and no further action is performed. */
3483
3484 static bfd_vma
3485 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
3486 {
3487 int current_n;
3488 bfd_vma g_n;
3489 bfd_vma encoded_g_n = 0;
3490 bfd_vma residual = value; /* Also known as Y_n. */
3491
3492 for (current_n = 0; current_n <= n; current_n++)
3493 {
3494 int shift;
3495
3496 /* Calculate which part of the value to mask. */
3497 if (residual == 0)
3498 shift = 0;
3499 else
3500 {
3501 int msb;
3502
3503 /* Determine the most significant bit in the residual and
3504 align the resulting value to a 2-bit boundary. */
3505 for (msb = 30; msb >= 0; msb -= 2)
3506 if (residual & (3 << msb))
3507 break;
3508
3509 /* The desired shift is now (msb - 6), or zero, whichever
3510 is the greater. */
3511 shift = msb - 6;
3512 if (shift < 0)
3513 shift = 0;
3514 }
3515
3516 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
3517 g_n = residual & (0xff << shift);
3518 encoded_g_n = (g_n >> shift)
3519 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
3520
3521 /* Calculate the residual for the next time around. */
3522 residual &= ~g_n;
3523 }
3524
3525 *final_residual = residual;
3526
3527 return encoded_g_n;
3528 }
3529
3530 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
3531 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
3532 static int
3533 identify_add_or_sub(bfd_vma insn)
3534 {
3535 int opcode = insn & 0x1e00000;
3536
3537 if (opcode == 1 << 23) /* ADD */
3538 return 1;
3539
3540 if (opcode == 1 << 22) /* SUB */
3541 return -1;
3542
3543 return 0;
3544 }
3545
3546 /* Determine if we're dealing with a Thumb-2 object. */
3547
3548 static int using_thumb2 (struct elf32_arm_link_hash_table *globals)
3549 {
3550 int arch = elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch);
3551 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
3552 }
3553
3554 /* Perform a relocation as part of a final link. */
3555
3556 static bfd_reloc_status_type
3557 elf32_arm_final_link_relocate (reloc_howto_type * howto,
3558 bfd * input_bfd,
3559 bfd * output_bfd,
3560 asection * input_section,
3561 bfd_byte * contents,
3562 Elf_Internal_Rela * rel,
3563 bfd_vma value,
3564 struct bfd_link_info * info,
3565 asection * sym_sec,
3566 const char * sym_name,
3567 int sym_flags,
3568 struct elf_link_hash_entry * h,
3569 bfd_boolean * unresolved_reloc_p,
3570 char **error_message)
3571 {
3572 unsigned long r_type = howto->type;
3573 unsigned long r_symndx;
3574 bfd_byte * hit_data = contents + rel->r_offset;
3575 bfd * dynobj = NULL;
3576 Elf_Internal_Shdr * symtab_hdr;
3577 struct elf_link_hash_entry ** sym_hashes;
3578 bfd_vma * local_got_offsets;
3579 asection * sgot = NULL;
3580 asection * splt = NULL;
3581 asection * sreloc = NULL;
3582 bfd_vma addend;
3583 bfd_signed_vma signed_addend;
3584 struct elf32_arm_link_hash_table * globals;
3585
3586 globals = elf32_arm_hash_table (info);
3587
3588 /* Some relocation type map to different relocations depending on the
3589 target. We pick the right one here. */
3590 r_type = arm_real_reloc_type (globals, r_type);
3591 if (r_type != howto->type)
3592 howto = elf32_arm_howto_from_type (r_type);
3593
3594 /* If the start address has been set, then set the EF_ARM_HASENTRY
3595 flag. Setting this more than once is redundant, but the cost is
3596 not too high, and it keeps the code simple.
3597
3598 The test is done here, rather than somewhere else, because the
3599 start address is only set just before the final link commences.
3600
3601 Note - if the user deliberately sets a start address of 0, the
3602 flag will not be set. */
3603 if (bfd_get_start_address (output_bfd) != 0)
3604 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
3605
3606 dynobj = elf_hash_table (info)->dynobj;
3607 if (dynobj)
3608 {
3609 sgot = bfd_get_section_by_name (dynobj, ".got");
3610 splt = bfd_get_section_by_name (dynobj, ".plt");
3611 }
3612 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3613 sym_hashes = elf_sym_hashes (input_bfd);
3614 local_got_offsets = elf_local_got_offsets (input_bfd);
3615 r_symndx = ELF32_R_SYM (rel->r_info);
3616
3617 if (globals->use_rel)
3618 {
3619 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
3620
3621 if (addend & ((howto->src_mask + 1) >> 1))
3622 {
3623 signed_addend = -1;
3624 signed_addend &= ~ howto->src_mask;
3625 signed_addend |= addend;
3626 }
3627 else
3628 signed_addend = addend;
3629 }
3630 else
3631 addend = signed_addend = rel->r_addend;
3632
3633 switch (r_type)
3634 {
3635 case R_ARM_NONE:
3636 /* We don't need to find a value for this symbol. It's just a
3637 marker. */
3638 *unresolved_reloc_p = FALSE;
3639 return bfd_reloc_ok;
3640
3641 case R_ARM_ABS12:
3642 if (!globals->vxworks_p)
3643 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
3644
3645 case R_ARM_PC24:
3646 case R_ARM_ABS32:
3647 case R_ARM_ABS32_NOI:
3648 case R_ARM_REL32:
3649 case R_ARM_REL32_NOI:
3650 case R_ARM_CALL:
3651 case R_ARM_JUMP24:
3652 case R_ARM_XPC25:
3653 case R_ARM_PREL31:
3654 case R_ARM_PLT32:
3655 /* r_symndx will be zero only for relocs against symbols
3656 from removed linkonce sections, or sections discarded by
3657 a linker script. */
3658 if (r_symndx == 0)
3659 {
3660 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
3661 return bfd_reloc_ok;
3662 }
3663
3664 /* Handle relocations which should use the PLT entry. ABS32/REL32
3665 will use the symbol's value, which may point to a PLT entry, but we
3666 don't need to handle that here. If we created a PLT entry, all
3667 branches in this object should go to it. */
3668 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
3669 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
3670 && h != NULL
3671 && splt != NULL
3672 && h->plt.offset != (bfd_vma) -1)
3673 {
3674 /* If we've created a .plt section, and assigned a PLT entry to
3675 this function, it should not be known to bind locally. If
3676 it were, we would have cleared the PLT entry. */
3677 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
3678
3679 value = (splt->output_section->vma
3680 + splt->output_offset
3681 + h->plt.offset);
3682 *unresolved_reloc_p = FALSE;
3683 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3684 contents, rel->r_offset, value,
3685 rel->r_addend);
3686 }
3687
3688 /* When generating a shared object or relocatable executable, these
3689 relocations are copied into the output file to be resolved at
3690 run time. */
3691 if ((info->shared || globals->root.is_relocatable_executable)
3692 && (input_section->flags & SEC_ALLOC)
3693 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
3694 || !SYMBOL_CALLS_LOCAL (info, h))
3695 && (h == NULL
3696 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3697 || h->root.type != bfd_link_hash_undefweak)
3698 && r_type != R_ARM_PC24
3699 && r_type != R_ARM_CALL
3700 && r_type != R_ARM_JUMP24
3701 && r_type != R_ARM_PREL31
3702 && r_type != R_ARM_PLT32)
3703 {
3704 Elf_Internal_Rela outrel;
3705 bfd_byte *loc;
3706 bfd_boolean skip, relocate;
3707
3708 *unresolved_reloc_p = FALSE;
3709
3710 if (sreloc == NULL)
3711 {
3712 const char * name;
3713
3714 name = (bfd_elf_string_from_elf_section
3715 (input_bfd,
3716 elf_elfheader (input_bfd)->e_shstrndx,
3717 elf_section_data (input_section)->rel_hdr.sh_name));
3718 if (name == NULL)
3719 return bfd_reloc_notsupported;
3720
3721 BFD_ASSERT (reloc_section_p (globals, name, input_section));
3722
3723 sreloc = bfd_get_section_by_name (dynobj, name);
3724 BFD_ASSERT (sreloc != NULL);
3725 }
3726
3727 skip = FALSE;
3728 relocate = FALSE;
3729
3730 outrel.r_addend = addend;
3731 outrel.r_offset =
3732 _bfd_elf_section_offset (output_bfd, info, input_section,
3733 rel->r_offset);
3734 if (outrel.r_offset == (bfd_vma) -1)
3735 skip = TRUE;
3736 else if (outrel.r_offset == (bfd_vma) -2)
3737 skip = TRUE, relocate = TRUE;
3738 outrel.r_offset += (input_section->output_section->vma
3739 + input_section->output_offset);
3740
3741 if (skip)
3742 memset (&outrel, 0, sizeof outrel);
3743 else if (h != NULL
3744 && h->dynindx != -1
3745 && (!info->shared
3746 || !info->symbolic
3747 || !h->def_regular))
3748 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3749 else
3750 {
3751 int symbol;
3752
3753 /* This symbol is local, or marked to become local. */
3754 if (sym_flags == STT_ARM_TFUNC)
3755 value |= 1;
3756 if (globals->symbian_p)
3757 {
3758 asection *osec;
3759
3760 /* On Symbian OS, the data segment and text segement
3761 can be relocated independently. Therefore, we
3762 must indicate the segment to which this
3763 relocation is relative. The BPABI allows us to
3764 use any symbol in the right segment; we just use
3765 the section symbol as it is convenient. (We
3766 cannot use the symbol given by "h" directly as it
3767 will not appear in the dynamic symbol table.)
3768
3769 Note that the dynamic linker ignores the section
3770 symbol value, so we don't subtract osec->vma
3771 from the emitted reloc addend. */
3772 if (sym_sec)
3773 osec = sym_sec->output_section;
3774 else
3775 osec = input_section->output_section;
3776 symbol = elf_section_data (osec)->dynindx;
3777 if (symbol == 0)
3778 {
3779 struct elf_link_hash_table *htab = elf_hash_table (info);
3780
3781 if ((osec->flags & SEC_READONLY) == 0
3782 && htab->data_index_section != NULL)
3783 osec = htab->data_index_section;
3784 else
3785 osec = htab->text_index_section;
3786 symbol = elf_section_data (osec)->dynindx;
3787 }
3788 BFD_ASSERT (symbol != 0);
3789 }
3790 else
3791 /* On SVR4-ish systems, the dynamic loader cannot
3792 relocate the text and data segments independently,
3793 so the symbol does not matter. */
3794 symbol = 0;
3795 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
3796 if (globals->use_rel)
3797 relocate = TRUE;
3798 else
3799 outrel.r_addend += value;
3800 }
3801
3802 loc = sreloc->contents;
3803 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
3804 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3805
3806 /* If this reloc is against an external symbol, we do not want to
3807 fiddle with the addend. Otherwise, we need to include the symbol
3808 value so that it becomes an addend for the dynamic reloc. */
3809 if (! relocate)
3810 return bfd_reloc_ok;
3811
3812 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3813 contents, rel->r_offset, value,
3814 (bfd_vma) 0);
3815 }
3816 else switch (r_type)
3817 {
3818 case R_ARM_ABS12:
3819 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
3820
3821 case R_ARM_XPC25: /* Arm BLX instruction. */
3822 case R_ARM_CALL:
3823 case R_ARM_JUMP24:
3824 case R_ARM_PC24: /* Arm B/BL instruction */
3825 case R_ARM_PLT32:
3826 if (r_type == R_ARM_XPC25)
3827 {
3828 /* Check for Arm calling Arm function. */
3829 /* FIXME: Should we translate the instruction into a BL
3830 instruction instead ? */
3831 if (sym_flags != STT_ARM_TFUNC)
3832 (*_bfd_error_handler)
3833 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
3834 input_bfd,
3835 h ? h->root.root.string : "(local)");
3836 }
3837 else if (r_type != R_ARM_CALL || !globals->use_blx)
3838 {
3839 /* Check for Arm calling Thumb function. */
3840 if (sym_flags == STT_ARM_TFUNC)
3841 {
3842 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
3843 output_bfd, input_section,
3844 hit_data, sym_sec, rel->r_offset,
3845 signed_addend, value,
3846 error_message))
3847 return bfd_reloc_ok;
3848 else
3849 return bfd_reloc_dangerous;
3850 }
3851 }
3852
3853 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
3854 where:
3855 S is the address of the symbol in the relocation.
3856 P is address of the instruction being relocated.
3857 A is the addend (extracted from the instruction) in bytes.
3858
3859 S is held in 'value'.
3860 P is the base address of the section containing the
3861 instruction plus the offset of the reloc into that
3862 section, ie:
3863 (input_section->output_section->vma +
3864 input_section->output_offset +
3865 rel->r_offset).
3866 A is the addend, converted into bytes, ie:
3867 (signed_addend * 4)
3868
3869 Note: None of these operations have knowledge of the pipeline
3870 size of the processor, thus it is up to the assembler to
3871 encode this information into the addend. */
3872 value -= (input_section->output_section->vma
3873 + input_section->output_offset);
3874 value -= rel->r_offset;
3875 if (globals->use_rel)
3876 value += (signed_addend << howto->size);
3877 else
3878 /* RELA addends do not have to be adjusted by howto->size. */
3879 value += signed_addend;
3880
3881 signed_addend = value;
3882 signed_addend >>= howto->rightshift;
3883
3884 /* It is not an error for an undefined weak reference to be
3885 out of range. Any program that branches to such a symbol
3886 is going to crash anyway, so there is no point worrying
3887 about getting the destination exactly right. */
3888 if (! h || h->root.type != bfd_link_hash_undefweak)
3889 {
3890 /* Perform a signed range check. */
3891 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
3892 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
3893 return bfd_reloc_overflow;
3894 }
3895
3896 addend = (value & 2);
3897
3898 value = (signed_addend & howto->dst_mask)
3899 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
3900
3901 /* Set the H bit in the BLX instruction. */
3902 if (sym_flags == STT_ARM_TFUNC)
3903 {
3904 if (addend)
3905 value |= (1 << 24);
3906 else
3907 value &= ~(bfd_vma)(1 << 24);
3908 }
3909 if (r_type == R_ARM_CALL)
3910 {
3911 /* Select the correct instruction (BL or BLX). */
3912 if (sym_flags == STT_ARM_TFUNC)
3913 value |= (1 << 28);
3914 else
3915 {
3916 value &= ~(bfd_vma)(1 << 28);
3917 value |= (1 << 24);
3918 }
3919 }
3920 break;
3921
3922 case R_ARM_ABS32:
3923 value += addend;
3924 if (sym_flags == STT_ARM_TFUNC)
3925 value |= 1;
3926 break;
3927
3928 case R_ARM_ABS32_NOI:
3929 value += addend;
3930 break;
3931
3932 case R_ARM_REL32:
3933 value += addend;
3934 if (sym_flags == STT_ARM_TFUNC)
3935 value |= 1;
3936 value -= (input_section->output_section->vma
3937 + input_section->output_offset + rel->r_offset);
3938 break;
3939
3940 case R_ARM_REL32_NOI:
3941 value += addend;
3942 value -= (input_section->output_section->vma
3943 + input_section->output_offset + rel->r_offset);
3944 break;
3945
3946 case R_ARM_PREL31:
3947 value -= (input_section->output_section->vma
3948 + input_section->output_offset + rel->r_offset);
3949 value += signed_addend;
3950 if (! h || h->root.type != bfd_link_hash_undefweak)
3951 {
3952 /* Check for overflow */
3953 if ((value ^ (value >> 1)) & (1 << 30))
3954 return bfd_reloc_overflow;
3955 }
3956 value &= 0x7fffffff;
3957 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
3958 if (sym_flags == STT_ARM_TFUNC)
3959 value |= 1;
3960 break;
3961 }
3962
3963 bfd_put_32 (input_bfd, value, hit_data);
3964 return bfd_reloc_ok;
3965
3966 case R_ARM_ABS8:
3967 value += addend;
3968 if ((long) value > 0x7f || (long) value < -0x80)
3969 return bfd_reloc_overflow;
3970
3971 bfd_put_8 (input_bfd, value, hit_data);
3972 return bfd_reloc_ok;
3973
3974 case R_ARM_ABS16:
3975 value += addend;
3976
3977 if ((long) value > 0x7fff || (long) value < -0x8000)
3978 return bfd_reloc_overflow;
3979
3980 bfd_put_16 (input_bfd, value, hit_data);
3981 return bfd_reloc_ok;
3982
3983 case R_ARM_THM_ABS5:
3984 /* Support ldr and str instructions for the thumb. */
3985 if (globals->use_rel)
3986 {
3987 /* Need to refetch addend. */
3988 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3989 /* ??? Need to determine shift amount from operand size. */
3990 addend >>= howto->rightshift;
3991 }
3992 value += addend;
3993
3994 /* ??? Isn't value unsigned? */
3995 if ((long) value > 0x1f || (long) value < -0x10)
3996 return bfd_reloc_overflow;
3997
3998 /* ??? Value needs to be properly shifted into place first. */
3999 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
4000 bfd_put_16 (input_bfd, value, hit_data);
4001 return bfd_reloc_ok;
4002
4003 case R_ARM_THM_ALU_PREL_11_0:
4004 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
4005 {
4006 bfd_vma insn;
4007 bfd_signed_vma relocation;
4008
4009 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4010 | bfd_get_16 (input_bfd, hit_data + 2);
4011
4012 if (globals->use_rel)
4013 {
4014 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
4015 | ((insn & (1 << 26)) >> 15);
4016 if (insn & 0xf00000)
4017 signed_addend = -signed_addend;
4018 }
4019
4020 relocation = value + signed_addend;
4021 relocation -= (input_section->output_section->vma
4022 + input_section->output_offset
4023 + rel->r_offset);
4024
4025 value = abs (relocation);
4026
4027 if (value >= 0x1000)
4028 return bfd_reloc_overflow;
4029
4030 insn = (insn & 0xfb0f8f00) | (value & 0xff)
4031 | ((value & 0x700) << 4)
4032 | ((value & 0x800) << 15);
4033 if (relocation < 0)
4034 insn |= 0xa00000;
4035
4036 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4037 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4038
4039 return bfd_reloc_ok;
4040 }
4041
4042 case R_ARM_THM_PC12:
4043 /* Corresponds to: ldr.w reg, [pc, #offset]. */
4044 {
4045 bfd_vma insn;
4046 bfd_signed_vma relocation;
4047
4048 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4049 | bfd_get_16 (input_bfd, hit_data + 2);
4050
4051 if (globals->use_rel)
4052 {
4053 signed_addend = insn & 0xfff;
4054 if (!(insn & (1 << 23)))
4055 signed_addend = -signed_addend;
4056 }
4057
4058 relocation = value + signed_addend;
4059 relocation -= (input_section->output_section->vma
4060 + input_section->output_offset
4061 + rel->r_offset);
4062
4063 value = abs (relocation);
4064
4065 if (value >= 0x1000)
4066 return bfd_reloc_overflow;
4067
4068 insn = (insn & 0xff7ff000) | value;
4069 if (relocation >= 0)
4070 insn |= (1 << 23);
4071
4072 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4073 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4074
4075 return bfd_reloc_ok;
4076 }
4077
4078 case R_ARM_THM_XPC22:
4079 case R_ARM_THM_CALL:
4080 /* Thumb BL (branch long instruction). */
4081 {
4082 bfd_vma relocation;
4083 bfd_vma reloc_sign;
4084 bfd_boolean overflow = FALSE;
4085 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
4086 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
4087 bfd_signed_vma reloc_signed_max;
4088 bfd_signed_vma reloc_signed_min;
4089 bfd_vma check;
4090 bfd_signed_vma signed_check;
4091 int bitsize;
4092 int thumb2 = using_thumb2 (globals);
4093
4094 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
4095 with Thumb-1) involving the J1 and J2 bits. */
4096 if (globals->use_rel)
4097 {
4098 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
4099 bfd_vma upper = upper_insn & 0x3ff;
4100 bfd_vma lower = lower_insn & 0x7ff;
4101 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
4102 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
4103 bfd_vma i1 = j1 ^ s ? 0 : 1;
4104 bfd_vma i2 = j2 ^ s ? 0 : 1;
4105
4106 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
4107 /* Sign extend. */
4108 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
4109
4110 signed_addend = addend;
4111 }
4112
4113 if (r_type == R_ARM_THM_XPC22)
4114 {
4115 /* Check for Thumb to Thumb call. */
4116 /* FIXME: Should we translate the instruction into a BL
4117 instruction instead ? */
4118 if (sym_flags == STT_ARM_TFUNC)
4119 (*_bfd_error_handler)
4120 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
4121 input_bfd,
4122 h ? h->root.root.string : "(local)");
4123 }
4124 else
4125 {
4126 /* If it is not a call to Thumb, assume call to Arm.
4127 If it is a call relative to a section name, then it is not a
4128 function call at all, but rather a long jump. Calls through
4129 the PLT do not require stubs. */
4130 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
4131 && (h == NULL || splt == NULL
4132 || h->plt.offset == (bfd_vma) -1))
4133 {
4134 if (globals->use_blx)
4135 {
4136 /* Convert BL to BLX. */
4137 lower_insn = (lower_insn & ~0x1000) | 0x0800;
4138 }
4139 else if (elf32_thumb_to_arm_stub
4140 (info, sym_name, input_bfd, output_bfd, input_section,
4141 hit_data, sym_sec, rel->r_offset, signed_addend, value,
4142 error_message))
4143 return bfd_reloc_ok;
4144 else
4145 return bfd_reloc_dangerous;
4146 }
4147 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx)
4148 {
4149 /* Make sure this is a BL. */
4150 lower_insn |= 0x1800;
4151 }
4152 }
4153
4154 /* Handle calls via the PLT. */
4155 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
4156 {
4157 value = (splt->output_section->vma
4158 + splt->output_offset
4159 + h->plt.offset);
4160 if (globals->use_blx)
4161 {
4162 /* If the Thumb BLX instruction is available, convert the
4163 BL to a BLX instruction to call the ARM-mode PLT entry. */
4164 lower_insn = (lower_insn & ~0x1000) | 0x0800;
4165 }
4166 else
4167 /* Target the Thumb stub before the ARM PLT entry. */
4168 value -= PLT_THUMB_STUB_SIZE;
4169 *unresolved_reloc_p = FALSE;
4170 }
4171
4172 relocation = value + signed_addend;
4173
4174 relocation -= (input_section->output_section->vma
4175 + input_section->output_offset
4176 + rel->r_offset);
4177
4178 check = relocation >> howto->rightshift;
4179
4180 /* If this is a signed value, the rightshift just dropped
4181 leading 1 bits (assuming twos complement). */
4182 if ((bfd_signed_vma) relocation >= 0)
4183 signed_check = check;
4184 else
4185 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
4186
4187 /* Calculate the permissable maximum and minimum values for
4188 this relocation according to whether we're relocating for
4189 Thumb-2 or not. */
4190 bitsize = howto->bitsize;
4191 if (!thumb2)
4192 bitsize -= 2;
4193 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
4194 reloc_signed_min = ~reloc_signed_max;
4195
4196 /* Assumes two's complement. */
4197 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
4198 overflow = TRUE;
4199
4200 if ((lower_insn & 0x1800) == 0x0800)
4201 /* For a BLX instruction, make sure that the relocation is rounded up
4202 to a word boundary. This follows the semantics of the instruction
4203 which specifies that bit 1 of the target address will come from bit
4204 1 of the base address. */
4205 relocation = (relocation + 2) & ~ 3;
4206
4207 /* Put RELOCATION back into the insn. Assumes two's complement.
4208 We use the Thumb-2 encoding, which is safe even if dealing with
4209 a Thumb-1 instruction by virtue of our overflow check above. */
4210 reloc_sign = (signed_check < 0) ? 1 : 0;
4211 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
4212 | ((relocation >> 12) & 0x3ff)
4213 | (reloc_sign << 10);
4214 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
4215 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
4216 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
4217 | ((relocation >> 1) & 0x7ff);
4218
4219 /* Put the relocated value back in the object file: */
4220 bfd_put_16 (input_bfd, upper_insn, hit_data);
4221 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
4222
4223 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
4224 }
4225 break;
4226
4227 case R_ARM_THM_JUMP24:
4228 /* Thumb32 unconditional branch instruction. */
4229 {
4230 bfd_vma relocation;
4231 bfd_boolean overflow = FALSE;
4232 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
4233 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
4234 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
4235 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
4236 bfd_vma check;
4237 bfd_signed_vma signed_check;
4238
4239 /* Need to refetch the addend, reconstruct the top three bits, and glue the
4240 two pieces together. */
4241 if (globals->use_rel)
4242 {
4243 bfd_vma S = (upper_insn & 0x0400) >> 10;
4244 bfd_vma hi = (upper_insn & 0x03ff);
4245 bfd_vma I1 = (lower_insn & 0x2000) >> 13;
4246 bfd_vma I2 = (lower_insn & 0x0800) >> 11;
4247 bfd_vma lo = (lower_insn & 0x07ff);
4248
4249 I1 = !(I1 ^ S);
4250 I2 = !(I2 ^ S);
4251 S = !S;
4252
4253 signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1);
4254 signed_addend -= (1 << 24); /* Sign extend. */
4255 }
4256
4257 /* ??? Should handle interworking? GCC might someday try to
4258 use this for tail calls. */
4259
4260 relocation = value + signed_addend;
4261 relocation -= (input_section->output_section->vma
4262 + input_section->output_offset
4263 + rel->r_offset);
4264
4265 check = relocation >> howto->rightshift;
4266
4267 /* If this is a signed value, the rightshift just dropped
4268 leading 1 bits (assuming twos complement). */
4269 if ((bfd_signed_vma) relocation >= 0)
4270 signed_check = check;
4271 else
4272 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
4273
4274 /* Assumes two's complement. */
4275 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
4276 overflow = TRUE;
4277
4278 /* Put RELOCATION back into the insn. */
4279 {
4280 bfd_vma S = (relocation & 0x01000000) >> 24;
4281 bfd_vma I1 = (relocation & 0x00800000) >> 23;
4282 bfd_vma I2 = (relocation & 0x00400000) >> 22;
4283 bfd_vma hi = (relocation & 0x003ff000) >> 12;
4284 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
4285
4286 I1 = !(I1 ^ S);
4287 I2 = !(I2 ^ S);
4288
4289 upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi;
4290 lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo;
4291 }
4292
4293 /* Put the relocated value back in the object file: */
4294 bfd_put_16 (input_bfd, upper_insn, hit_data);
4295 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
4296
4297 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
4298 }
4299
4300 case R_ARM_THM_JUMP19:
4301 /* Thumb32 conditional branch instruction. */
4302 {
4303 bfd_vma relocation;
4304 bfd_boolean overflow = FALSE;
4305 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
4306 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
4307 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
4308 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
4309 bfd_vma check;
4310 bfd_signed_vma signed_check;
4311
4312 /* Need to refetch the addend, reconstruct the top three bits,
4313 and squish the two 11 bit pieces together. */
4314 if (globals->use_rel)
4315 {
4316 bfd_vma S = (upper_insn & 0x0400) >> 10;
4317 bfd_vma upper = (upper_insn & 0x001f);
4318 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
4319 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
4320 bfd_vma lower = (lower_insn & 0x07ff);
4321
4322 upper |= J2 << 6;
4323 upper |= J1 << 7;
4324 upper |= ~S << 8;
4325 upper -= 0x0100; /* Sign extend. */
4326
4327 addend = (upper << 12) | (lower << 1);
4328 signed_addend = addend;
4329 }
4330
4331 /* ??? Should handle interworking? GCC might someday try to
4332 use this for tail calls. */
4333
4334 relocation = value + signed_addend;
4335 relocation -= (input_section->output_section->vma
4336 + input_section->output_offset
4337 + rel->r_offset);
4338
4339 check = relocation >> howto->rightshift;
4340
4341 /* If this is a signed value, the rightshift just dropped
4342 leading 1 bits (assuming twos complement). */
4343 if ((bfd_signed_vma) relocation >= 0)
4344 signed_check = check;
4345 else
4346 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
4347
4348 /* Assumes two's complement. */
4349 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
4350 overflow = TRUE;
4351
4352 /* Put RELOCATION back into the insn. */
4353 {
4354 bfd_vma S = (relocation & 0x00100000) >> 20;
4355 bfd_vma J2 = (relocation & 0x00080000) >> 19;
4356 bfd_vma J1 = (relocation & 0x00040000) >> 18;
4357 bfd_vma hi = (relocation & 0x0003f000) >> 12;
4358 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
4359
4360 upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi;
4361 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
4362 }
4363
4364 /* Put the relocated value back in the object file: */
4365 bfd_put_16 (input_bfd, upper_insn, hit_data);
4366 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
4367
4368 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
4369 }
4370
4371 case R_ARM_THM_JUMP11:
4372 case R_ARM_THM_JUMP8:
4373 case R_ARM_THM_JUMP6:
4374 /* Thumb B (branch) instruction). */
4375 {
4376 bfd_signed_vma relocation;
4377 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
4378 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
4379 bfd_signed_vma signed_check;
4380
4381 /* CZB cannot jump backward. */
4382 if (r_type == R_ARM_THM_JUMP6)
4383 reloc_signed_min = 0;
4384
4385 if (globals->use_rel)
4386 {
4387 /* Need to refetch addend. */
4388 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
4389 if (addend & ((howto->src_mask + 1) >> 1))
4390 {
4391 signed_addend = -1;
4392 signed_addend &= ~ howto->src_mask;
4393 signed_addend |= addend;
4394 }
4395 else
4396 signed_addend = addend;
4397 /* The value in the insn has been right shifted. We need to
4398 undo this, so that we can perform the address calculation
4399 in terms of bytes. */
4400 signed_addend <<= howto->rightshift;
4401 }
4402 relocation = value + signed_addend;
4403
4404 relocation -= (input_section->output_section->vma
4405 + input_section->output_offset
4406 + rel->r_offset);
4407
4408 relocation >>= howto->rightshift;
4409 signed_check = relocation;
4410
4411 if (r_type == R_ARM_THM_JUMP6)
4412 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
4413 else
4414 relocation &= howto->dst_mask;
4415 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
4416
4417 bfd_put_16 (input_bfd, relocation, hit_data);
4418
4419 /* Assumes two's complement. */
4420 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
4421 return bfd_reloc_overflow;
4422
4423 return bfd_reloc_ok;
4424 }
4425
4426 case R_ARM_ALU_PCREL7_0:
4427 case R_ARM_ALU_PCREL15_8:
4428 case R_ARM_ALU_PCREL23_15:
4429 {
4430 bfd_vma insn;
4431 bfd_vma relocation;
4432
4433 insn = bfd_get_32 (input_bfd, hit_data);
4434 if (globals->use_rel)
4435 {
4436 /* Extract the addend. */
4437 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
4438 signed_addend = addend;
4439 }
4440 relocation = value + signed_addend;
4441
4442 relocation -= (input_section->output_section->vma
4443 + input_section->output_offset
4444 + rel->r_offset);
4445 insn = (insn & ~0xfff)
4446 | ((howto->bitpos << 7) & 0xf00)
4447 | ((relocation >> howto->bitpos) & 0xff);
4448 bfd_put_32 (input_bfd, value, hit_data);
4449 }
4450 return bfd_reloc_ok;
4451
4452 case R_ARM_GNU_VTINHERIT:
4453 case R_ARM_GNU_VTENTRY:
4454 return bfd_reloc_ok;
4455
4456 case R_ARM_GOTOFF32:
4457 /* Relocation is relative to the start of the
4458 global offset table. */
4459
4460 BFD_ASSERT (sgot != NULL);
4461 if (sgot == NULL)
4462 return bfd_reloc_notsupported;
4463
4464 /* If we are addressing a Thumb function, we need to adjust the
4465 address by one, so that attempts to call the function pointer will
4466 correctly interpret it as Thumb code. */
4467 if (sym_flags == STT_ARM_TFUNC)
4468 value += 1;
4469
4470 /* Note that sgot->output_offset is not involved in this
4471 calculation. We always want the start of .got. If we
4472 define _GLOBAL_OFFSET_TABLE in a different way, as is
4473 permitted by the ABI, we might have to change this
4474 calculation. */
4475 value -= sgot->output_section->vma;
4476 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4477 contents, rel->r_offset, value,
4478 rel->r_addend);
4479
4480 case R_ARM_GOTPC:
4481 /* Use global offset table as symbol value. */
4482 BFD_ASSERT (sgot != NULL);
4483
4484 if (sgot == NULL)
4485 return bfd_reloc_notsupported;
4486
4487 *unresolved_reloc_p = FALSE;
4488 value = sgot->output_section->vma;
4489 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4490 contents, rel->r_offset, value,
4491 rel->r_addend);
4492
4493 case R_ARM_GOT32:
4494 case R_ARM_GOT_PREL:
4495 /* Relocation is to the entry for this symbol in the
4496 global offset table. */
4497 if (sgot == NULL)
4498 return bfd_reloc_notsupported;
4499
4500 if (h != NULL)
4501 {
4502 bfd_vma off;
4503 bfd_boolean dyn;
4504
4505 off = h->got.offset;
4506 BFD_ASSERT (off != (bfd_vma) -1);
4507 dyn = globals->root.dynamic_sections_created;
4508
4509 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
4510 || (info->shared
4511 && SYMBOL_REFERENCES_LOCAL (info, h))
4512 || (ELF_ST_VISIBILITY (h->other)
4513 && h->root.type == bfd_link_hash_undefweak))
4514 {
4515 /* This is actually a static link, or it is a -Bsymbolic link
4516 and the symbol is defined locally. We must initialize this
4517 entry in the global offset table. Since the offset must
4518 always be a multiple of 4, we use the least significant bit
4519 to record whether we have initialized it already.
4520
4521 When doing a dynamic link, we create a .rel(a).got relocation
4522 entry to initialize the value. This is done in the
4523 finish_dynamic_symbol routine. */
4524 if ((off & 1) != 0)
4525 off &= ~1;
4526 else
4527 {
4528 /* If we are addressing a Thumb function, we need to
4529 adjust the address by one, so that attempts to
4530 call the function pointer will correctly
4531 interpret it as Thumb code. */
4532 if (sym_flags == STT_ARM_TFUNC)
4533 value |= 1;
4534
4535 bfd_put_32 (output_bfd, value, sgot->contents + off);
4536 h->got.offset |= 1;
4537 }
4538 }
4539 else
4540 *unresolved_reloc_p = FALSE;
4541
4542 value = sgot->output_offset + off;
4543 }
4544 else
4545 {
4546 bfd_vma off;
4547
4548 BFD_ASSERT (local_got_offsets != NULL &&
4549 local_got_offsets[r_symndx] != (bfd_vma) -1);
4550
4551 off = local_got_offsets[r_symndx];
4552
4553 /* The offset must always be a multiple of 4. We use the
4554 least significant bit to record whether we have already
4555 generated the necessary reloc. */
4556 if ((off & 1) != 0)
4557 off &= ~1;
4558 else
4559 {
4560 /* If we are addressing a Thumb function, we need to
4561 adjust the address by one, so that attempts to
4562 call the function pointer will correctly
4563 interpret it as Thumb code. */
4564 if (sym_flags == STT_ARM_TFUNC)
4565 value |= 1;
4566
4567 if (globals->use_rel)
4568 bfd_put_32 (output_bfd, value, sgot->contents + off);
4569
4570 if (info->shared)
4571 {
4572 asection * srelgot;
4573 Elf_Internal_Rela outrel;
4574 bfd_byte *loc;
4575
4576 srelgot = (bfd_get_section_by_name
4577 (dynobj, RELOC_SECTION (globals, ".got")));
4578 BFD_ASSERT (srelgot != NULL);
4579
4580 outrel.r_addend = addend + value;
4581 outrel.r_offset = (sgot->output_section->vma
4582 + sgot->output_offset
4583 + off);
4584 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
4585 loc = srelgot->contents;
4586 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
4587 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4588 }
4589
4590 local_got_offsets[r_symndx] |= 1;
4591 }
4592
4593 value = sgot->output_offset + off;
4594 }
4595 if (r_type != R_ARM_GOT32)
4596 value += sgot->output_section->vma;
4597
4598 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4599 contents, rel->r_offset, value,
4600 rel->r_addend);
4601
4602 case R_ARM_TLS_LDO32:
4603 value = value - dtpoff_base (info);
4604
4605 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4606 contents, rel->r_offset, value,
4607 rel->r_addend);
4608
4609 case R_ARM_TLS_LDM32:
4610 {
4611 bfd_vma off;
4612
4613 if (globals->sgot == NULL)
4614 abort ();
4615
4616 off = globals->tls_ldm_got.offset;
4617
4618 if ((off & 1) != 0)
4619 off &= ~1;
4620 else
4621 {
4622 /* If we don't know the module number, create a relocation
4623 for it. */
4624 if (info->shared)
4625 {
4626 Elf_Internal_Rela outrel;
4627 bfd_byte *loc;
4628
4629 if (globals->srelgot == NULL)
4630 abort ();
4631
4632 outrel.r_addend = 0;
4633 outrel.r_offset = (globals->sgot->output_section->vma
4634 + globals->sgot->output_offset + off);
4635 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
4636
4637 if (globals->use_rel)
4638 bfd_put_32 (output_bfd, outrel.r_addend,
4639 globals->sgot->contents + off);
4640
4641 loc = globals->srelgot->contents;
4642 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
4643 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4644 }
4645 else
4646 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
4647
4648 globals->tls_ldm_got.offset |= 1;
4649 }
4650
4651 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
4652 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
4653
4654 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4655 contents, rel->r_offset, value,
4656 rel->r_addend);
4657 }
4658
4659 case R_ARM_TLS_GD32:
4660 case R_ARM_TLS_IE32:
4661 {
4662 bfd_vma off;
4663 int indx;
4664 char tls_type;
4665
4666 if (globals->sgot == NULL)
4667 abort ();
4668
4669 indx = 0;
4670 if (h != NULL)
4671 {
4672 bfd_boolean dyn;
4673 dyn = globals->root.dynamic_sections_created;
4674 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
4675 && (!info->shared
4676 || !SYMBOL_REFERENCES_LOCAL (info, h)))
4677 {
4678 *unresolved_reloc_p = FALSE;
4679 indx = h->dynindx;
4680 }
4681 off = h->got.offset;
4682 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
4683 }
4684 else
4685 {
4686 if (local_got_offsets == NULL)
4687 abort ();
4688 off = local_got_offsets[r_symndx];
4689 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
4690 }
4691
4692 if (tls_type == GOT_UNKNOWN)
4693 abort ();
4694
4695 if ((off & 1) != 0)
4696 off &= ~1;
4697 else
4698 {
4699 bfd_boolean need_relocs = FALSE;
4700 Elf_Internal_Rela outrel;
4701 bfd_byte *loc = NULL;
4702 int cur_off = off;
4703
4704 /* The GOT entries have not been initialized yet. Do it
4705 now, and emit any relocations. If both an IE GOT and a
4706 GD GOT are necessary, we emit the GD first. */
4707
4708 if ((info->shared || indx != 0)
4709 && (h == NULL
4710 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4711 || h->root.type != bfd_link_hash_undefweak))
4712 {
4713 need_relocs = TRUE;
4714 if (globals->srelgot == NULL)
4715 abort ();
4716 loc = globals->srelgot->contents;
4717 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
4718 }
4719
4720 if (tls_type & GOT_TLS_GD)
4721 {
4722 if (need_relocs)
4723 {
4724 outrel.r_addend = 0;
4725 outrel.r_offset = (globals->sgot->output_section->vma
4726 + globals->sgot->output_offset
4727 + cur_off);
4728 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
4729
4730 if (globals->use_rel)
4731 bfd_put_32 (output_bfd, outrel.r_addend,
4732 globals->sgot->contents + cur_off);
4733
4734 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4735 globals->srelgot->reloc_count++;
4736 loc += RELOC_SIZE (globals);
4737
4738 if (indx == 0)
4739 bfd_put_32 (output_bfd, value - dtpoff_base (info),
4740 globals->sgot->contents + cur_off + 4);
4741 else
4742 {
4743 outrel.r_addend = 0;
4744 outrel.r_info = ELF32_R_INFO (indx,
4745 R_ARM_TLS_DTPOFF32);
4746 outrel.r_offset += 4;
4747
4748 if (globals->use_rel)
4749 bfd_put_32 (output_bfd, outrel.r_addend,
4750 globals->sgot->contents + cur_off + 4);
4751
4752
4753 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4754 globals->srelgot->reloc_count++;
4755 loc += RELOC_SIZE (globals);
4756 }
4757 }
4758 else
4759 {
4760 /* If we are not emitting relocations for a
4761 general dynamic reference, then we must be in a
4762 static link or an executable link with the
4763 symbol binding locally. Mark it as belonging
4764 to module 1, the executable. */
4765 bfd_put_32 (output_bfd, 1,
4766 globals->sgot->contents + cur_off);
4767 bfd_put_32 (output_bfd, value - dtpoff_base (info),
4768 globals->sgot->contents + cur_off + 4);
4769 }
4770
4771 cur_off += 8;
4772 }
4773
4774 if (tls_type & GOT_TLS_IE)
4775 {
4776 if (need_relocs)
4777 {
4778 if (indx == 0)
4779 outrel.r_addend = value - dtpoff_base (info);
4780 else
4781 outrel.r_addend = 0;
4782 outrel.r_offset = (globals->sgot->output_section->vma
4783 + globals->sgot->output_offset
4784 + cur_off);
4785 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
4786
4787 if (globals->use_rel)
4788 bfd_put_32 (output_bfd, outrel.r_addend,
4789 globals->sgot->contents + cur_off);
4790
4791 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4792 globals->srelgot->reloc_count++;
4793 loc += RELOC_SIZE (globals);
4794 }
4795 else
4796 bfd_put_32 (output_bfd, tpoff (info, value),
4797 globals->sgot->contents + cur_off);
4798 cur_off += 4;
4799 }
4800
4801 if (h != NULL)
4802 h->got.offset |= 1;
4803 else
4804 local_got_offsets[r_symndx] |= 1;
4805 }
4806
4807 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
4808 off += 8;
4809 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
4810 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
4811
4812 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4813 contents, rel->r_offset, value,
4814 rel->r_addend);
4815 }
4816
4817 case R_ARM_TLS_LE32:
4818 if (info->shared)
4819 {
4820 (*_bfd_error_handler)
4821 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
4822 input_bfd, input_section,
4823 (long) rel->r_offset, howto->name);
4824 return FALSE;
4825 }
4826 else
4827 value = tpoff (info, value);
4828
4829 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4830 contents, rel->r_offset, value,
4831 rel->r_addend);
4832
4833 case R_ARM_V4BX:
4834 if (globals->fix_v4bx)
4835 {
4836 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
4837
4838 /* Ensure that we have a BX instruction. */
4839 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
4840
4841 /* Preserve Rm (lowest four bits) and the condition code
4842 (highest four bits). Other bits encode MOV PC,Rm. */
4843 insn = (insn & 0xf000000f) | 0x01a0f000;
4844
4845 bfd_put_32 (input_bfd, insn, hit_data);
4846 }
4847 return bfd_reloc_ok;
4848
4849 case R_ARM_MOVW_ABS_NC:
4850 case R_ARM_MOVT_ABS:
4851 case R_ARM_MOVW_PREL_NC:
4852 case R_ARM_MOVT_PREL:
4853 /* Until we properly support segment-base-relative addressing then
4854 we assume the segment base to be zero, as for the group relocations.
4855 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
4856 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
4857 case R_ARM_MOVW_BREL_NC:
4858 case R_ARM_MOVW_BREL:
4859 case R_ARM_MOVT_BREL:
4860 {
4861 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
4862
4863 if (globals->use_rel)
4864 {
4865 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
4866 signed_addend = (addend ^ 0x10000) - 0x10000;
4867 }
4868
4869 value += signed_addend;
4870
4871 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
4872 value -= (input_section->output_section->vma
4873 + input_section->output_offset + rel->r_offset);
4874
4875 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
4876 return bfd_reloc_overflow;
4877
4878 if (sym_flags == STT_ARM_TFUNC)
4879 value |= 1;
4880
4881 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
4882 || r_type == R_ARM_MOVT_BREL)
4883 value >>= 16;
4884
4885 insn &= 0xfff0f000;
4886 insn |= value & 0xfff;
4887 insn |= (value & 0xf000) << 4;
4888 bfd_put_32 (input_bfd, insn, hit_data);
4889 }
4890 return bfd_reloc_ok;
4891
4892 case R_ARM_THM_MOVW_ABS_NC:
4893 case R_ARM_THM_MOVT_ABS:
4894 case R_ARM_THM_MOVW_PREL_NC:
4895 case R_ARM_THM_MOVT_PREL:
4896 /* Until we properly support segment-base-relative addressing then
4897 we assume the segment base to be zero, as for the above relocations.
4898 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
4899 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
4900 as R_ARM_THM_MOVT_ABS. */
4901 case R_ARM_THM_MOVW_BREL_NC:
4902 case R_ARM_THM_MOVW_BREL:
4903 case R_ARM_THM_MOVT_BREL:
4904 {
4905 bfd_vma insn;
4906
4907 insn = bfd_get_16 (input_bfd, hit_data) << 16;
4908 insn |= bfd_get_16 (input_bfd, hit_data + 2);
4909
4910 if (globals->use_rel)
4911 {
4912 addend = ((insn >> 4) & 0xf000)
4913 | ((insn >> 15) & 0x0800)
4914 | ((insn >> 4) & 0x0700)
4915 | (insn & 0x00ff);
4916 signed_addend = (addend ^ 0x10000) - 0x10000;
4917 }
4918
4919 value += signed_addend;
4920
4921 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
4922 value -= (input_section->output_section->vma
4923 + input_section->output_offset + rel->r_offset);
4924
4925 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
4926 return bfd_reloc_overflow;
4927
4928 if (sym_flags == STT_ARM_TFUNC)
4929 value |= 1;
4930
4931 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
4932 || r_type == R_ARM_THM_MOVT_BREL)
4933 value >>= 16;
4934
4935 insn &= 0xfbf08f00;
4936 insn |= (value & 0xf000) << 4;
4937 insn |= (value & 0x0800) << 15;
4938 insn |= (value & 0x0700) << 4;
4939 insn |= (value & 0x00ff);
4940
4941 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4942 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4943 }
4944 return bfd_reloc_ok;
4945
4946 case R_ARM_ALU_PC_G0_NC:
4947 case R_ARM_ALU_PC_G1_NC:
4948 case R_ARM_ALU_PC_G0:
4949 case R_ARM_ALU_PC_G1:
4950 case R_ARM_ALU_PC_G2:
4951 case R_ARM_ALU_SB_G0_NC:
4952 case R_ARM_ALU_SB_G1_NC:
4953 case R_ARM_ALU_SB_G0:
4954 case R_ARM_ALU_SB_G1:
4955 case R_ARM_ALU_SB_G2:
4956 {
4957 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
4958 bfd_vma pc = input_section->output_section->vma
4959 + input_section->output_offset + rel->r_offset;
4960 /* sb should be the origin of the *segment* containing the symbol.
4961 It is not clear how to obtain this OS-dependent value, so we
4962 make an arbitrary choice of zero. */
4963 bfd_vma sb = 0;
4964 bfd_vma residual;
4965 bfd_vma g_n;
4966 bfd_signed_vma signed_value;
4967 int group = 0;
4968
4969 /* Determine which group of bits to select. */
4970 switch (r_type)
4971 {
4972 case R_ARM_ALU_PC_G0_NC:
4973 case R_ARM_ALU_PC_G0:
4974 case R_ARM_ALU_SB_G0_NC:
4975 case R_ARM_ALU_SB_G0:
4976 group = 0;
4977 break;
4978
4979 case R_ARM_ALU_PC_G1_NC:
4980 case R_ARM_ALU_PC_G1:
4981 case R_ARM_ALU_SB_G1_NC:
4982 case R_ARM_ALU_SB_G1:
4983 group = 1;
4984 break;
4985
4986 case R_ARM_ALU_PC_G2:
4987 case R_ARM_ALU_SB_G2:
4988 group = 2;
4989 break;
4990
4991 default:
4992 abort();
4993 }
4994
4995 /* If REL, extract the addend from the insn. If RELA, it will
4996 have already been fetched for us. */
4997 if (globals->use_rel)
4998 {
4999 int negative;
5000 bfd_vma constant = insn & 0xff;
5001 bfd_vma rotation = (insn & 0xf00) >> 8;
5002
5003 if (rotation == 0)
5004 signed_addend = constant;
5005 else
5006 {
5007 /* Compensate for the fact that in the instruction, the
5008 rotation is stored in multiples of 2 bits. */
5009 rotation *= 2;
5010
5011 /* Rotate "constant" right by "rotation" bits. */
5012 signed_addend = (constant >> rotation) |
5013 (constant << (8 * sizeof (bfd_vma) - rotation));
5014 }
5015
5016 /* Determine if the instruction is an ADD or a SUB.
5017 (For REL, this determines the sign of the addend.) */
5018 negative = identify_add_or_sub (insn);
5019 if (negative == 0)
5020 {
5021 (*_bfd_error_handler)
5022 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
5023 input_bfd, input_section,
5024 (long) rel->r_offset, howto->name);
5025 return bfd_reloc_overflow;
5026 }
5027
5028 signed_addend *= negative;
5029 }
5030
5031 /* Compute the value (X) to go in the place. */
5032 if (r_type == R_ARM_ALU_PC_G0_NC
5033 || r_type == R_ARM_ALU_PC_G1_NC
5034 || r_type == R_ARM_ALU_PC_G0
5035 || r_type == R_ARM_ALU_PC_G1
5036 || r_type == R_ARM_ALU_PC_G2)
5037 /* PC relative. */
5038 signed_value = value - pc + signed_addend;
5039 else
5040 /* Section base relative. */
5041 signed_value = value - sb + signed_addend;
5042
5043 /* If the target symbol is a Thumb function, then set the
5044 Thumb bit in the address. */
5045 if (sym_flags == STT_ARM_TFUNC)
5046 signed_value |= 1;
5047
5048 /* Calculate the value of the relevant G_n, in encoded
5049 constant-with-rotation format. */
5050 g_n = calculate_group_reloc_mask (abs (signed_value), group,
5051 &residual);
5052
5053 /* Check for overflow if required. */
5054 if ((r_type == R_ARM_ALU_PC_G0
5055 || r_type == R_ARM_ALU_PC_G1
5056 || r_type == R_ARM_ALU_PC_G2
5057 || r_type == R_ARM_ALU_SB_G0
5058 || r_type == R_ARM_ALU_SB_G1
5059 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
5060 {
5061 (*_bfd_error_handler)
5062 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
5063 input_bfd, input_section,
5064 (long) rel->r_offset, abs (signed_value), howto->name);
5065 return bfd_reloc_overflow;
5066 }
5067
5068 /* Mask out the value and the ADD/SUB part of the opcode; take care
5069 not to destroy the S bit. */
5070 insn &= 0xff1ff000;
5071
5072 /* Set the opcode according to whether the value to go in the
5073 place is negative. */
5074 if (signed_value < 0)
5075 insn |= 1 << 22;
5076 else
5077 insn |= 1 << 23;
5078
5079 /* Encode the offset. */
5080 insn |= g_n;
5081
5082 bfd_put_32 (input_bfd, insn, hit_data);
5083 }
5084 return bfd_reloc_ok;
5085
5086 case R_ARM_LDR_PC_G0:
5087 case R_ARM_LDR_PC_G1:
5088 case R_ARM_LDR_PC_G2:
5089 case R_ARM_LDR_SB_G0:
5090 case R_ARM_LDR_SB_G1:
5091 case R_ARM_LDR_SB_G2:
5092 {
5093 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5094 bfd_vma pc = input_section->output_section->vma
5095 + input_section->output_offset + rel->r_offset;
5096 bfd_vma sb = 0; /* See note above. */
5097 bfd_vma residual;
5098 bfd_signed_vma signed_value;
5099 int group = 0;
5100
5101 /* Determine which groups of bits to calculate. */
5102 switch (r_type)
5103 {
5104 case R_ARM_LDR_PC_G0:
5105 case R_ARM_LDR_SB_G0:
5106 group = 0;
5107 break;
5108
5109 case R_ARM_LDR_PC_G1:
5110 case R_ARM_LDR_SB_G1:
5111 group = 1;
5112 break;
5113
5114 case R_ARM_LDR_PC_G2:
5115 case R_ARM_LDR_SB_G2:
5116 group = 2;
5117 break;
5118
5119 default:
5120 abort();
5121 }
5122
5123 /* If REL, extract the addend from the insn. If RELA, it will
5124 have already been fetched for us. */
5125 if (globals->use_rel)
5126 {
5127 int negative = (insn & (1 << 23)) ? 1 : -1;
5128 signed_addend = negative * (insn & 0xfff);
5129 }
5130
5131 /* Compute the value (X) to go in the place. */
5132 if (r_type == R_ARM_LDR_PC_G0
5133 || r_type == R_ARM_LDR_PC_G1
5134 || r_type == R_ARM_LDR_PC_G2)
5135 /* PC relative. */
5136 signed_value = value - pc + signed_addend;
5137 else
5138 /* Section base relative. */
5139 signed_value = value - sb + signed_addend;
5140
5141 /* Calculate the value of the relevant G_{n-1} to obtain
5142 the residual at that stage. */
5143 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
5144
5145 /* Check for overflow. */
5146 if (residual >= 0x1000)
5147 {
5148 (*_bfd_error_handler)
5149 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
5150 input_bfd, input_section,
5151 (long) rel->r_offset, abs (signed_value), howto->name);
5152 return bfd_reloc_overflow;
5153 }
5154
5155 /* Mask out the value and U bit. */
5156 insn &= 0xff7ff000;
5157
5158 /* Set the U bit if the value to go in the place is non-negative. */
5159 if (signed_value >= 0)
5160 insn |= 1 << 23;
5161
5162 /* Encode the offset. */
5163 insn |= residual;
5164
5165 bfd_put_32 (input_bfd, insn, hit_data);
5166 }
5167 return bfd_reloc_ok;
5168
5169 case R_ARM_LDRS_PC_G0:
5170 case R_ARM_LDRS_PC_G1:
5171 case R_ARM_LDRS_PC_G2:
5172 case R_ARM_LDRS_SB_G0:
5173 case R_ARM_LDRS_SB_G1:
5174 case R_ARM_LDRS_SB_G2:
5175 {
5176 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5177 bfd_vma pc = input_section->output_section->vma
5178 + input_section->output_offset + rel->r_offset;
5179 bfd_vma sb = 0; /* See note above. */
5180 bfd_vma residual;
5181 bfd_signed_vma signed_value;
5182 int group = 0;
5183
5184 /* Determine which groups of bits to calculate. */
5185 switch (r_type)
5186 {
5187 case R_ARM_LDRS_PC_G0:
5188 case R_ARM_LDRS_SB_G0:
5189 group = 0;
5190 break;
5191
5192 case R_ARM_LDRS_PC_G1:
5193 case R_ARM_LDRS_SB_G1:
5194 group = 1;
5195 break;
5196
5197 case R_ARM_LDRS_PC_G2:
5198 case R_ARM_LDRS_SB_G2:
5199 group = 2;
5200 break;
5201
5202 default:
5203 abort();
5204 }
5205
5206 /* If REL, extract the addend from the insn. If RELA, it will
5207 have already been fetched for us. */
5208 if (globals->use_rel)
5209 {
5210 int negative = (insn & (1 << 23)) ? 1 : -1;
5211 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
5212 }
5213
5214 /* Compute the value (X) to go in the place. */
5215 if (r_type == R_ARM_LDRS_PC_G0
5216 || r_type == R_ARM_LDRS_PC_G1
5217 || r_type == R_ARM_LDRS_PC_G2)
5218 /* PC relative. */
5219 signed_value = value - pc + signed_addend;
5220 else
5221 /* Section base relative. */
5222 signed_value = value - sb + signed_addend;
5223
5224 /* Calculate the value of the relevant G_{n-1} to obtain
5225 the residual at that stage. */
5226 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
5227
5228 /* Check for overflow. */
5229 if (residual >= 0x100)
5230 {
5231 (*_bfd_error_handler)
5232 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
5233 input_bfd, input_section,
5234 (long) rel->r_offset, abs (signed_value), howto->name);
5235 return bfd_reloc_overflow;
5236 }
5237
5238 /* Mask out the value and U bit. */
5239 insn &= 0xff7ff0f0;
5240
5241 /* Set the U bit if the value to go in the place is non-negative. */
5242 if (signed_value >= 0)
5243 insn |= 1 << 23;
5244
5245 /* Encode the offset. */
5246 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
5247
5248 bfd_put_32 (input_bfd, insn, hit_data);
5249 }
5250 return bfd_reloc_ok;
5251
5252 case R_ARM_LDC_PC_G0:
5253 case R_ARM_LDC_PC_G1:
5254 case R_ARM_LDC_PC_G2:
5255 case R_ARM_LDC_SB_G0:
5256 case R_ARM_LDC_SB_G1:
5257 case R_ARM_LDC_SB_G2:
5258 {
5259 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5260 bfd_vma pc = input_section->output_section->vma
5261 + input_section->output_offset + rel->r_offset;
5262 bfd_vma sb = 0; /* See note above. */
5263 bfd_vma residual;
5264 bfd_signed_vma signed_value;
5265 int group = 0;
5266
5267 /* Determine which groups of bits to calculate. */
5268 switch (r_type)
5269 {
5270 case R_ARM_LDC_PC_G0:
5271 case R_ARM_LDC_SB_G0:
5272 group = 0;
5273 break;
5274
5275 case R_ARM_LDC_PC_G1:
5276 case R_ARM_LDC_SB_G1:
5277 group = 1;
5278 break;
5279
5280 case R_ARM_LDC_PC_G2:
5281 case R_ARM_LDC_SB_G2:
5282 group = 2;
5283 break;
5284
5285 default:
5286 abort();
5287 }
5288
5289 /* If REL, extract the addend from the insn. If RELA, it will
5290 have already been fetched for us. */
5291 if (globals->use_rel)
5292 {
5293 int negative = (insn & (1 << 23)) ? 1 : -1;
5294 signed_addend = negative * ((insn & 0xff) << 2);
5295 }
5296
5297 /* Compute the value (X) to go in the place. */
5298 if (r_type == R_ARM_LDC_PC_G0
5299 || r_type == R_ARM_LDC_PC_G1
5300 || r_type == R_ARM_LDC_PC_G2)
5301 /* PC relative. */
5302 signed_value = value - pc + signed_addend;
5303 else
5304 /* Section base relative. */
5305 signed_value = value - sb + signed_addend;
5306
5307 /* Calculate the value of the relevant G_{n-1} to obtain
5308 the residual at that stage. */
5309 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
5310
5311 /* Check for overflow. (The absolute value to go in the place must be
5312 divisible by four and, after having been divided by four, must
5313 fit in eight bits.) */
5314 if ((residual & 0x3) != 0 || residual >= 0x400)
5315 {
5316 (*_bfd_error_handler)
5317 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
5318 input_bfd, input_section,
5319 (long) rel->r_offset, abs (signed_value), howto->name);
5320 return bfd_reloc_overflow;
5321 }
5322
5323 /* Mask out the value and U bit. */
5324 insn &= 0xff7fff00;
5325
5326 /* Set the U bit if the value to go in the place is non-negative. */
5327 if (signed_value >= 0)
5328 insn |= 1 << 23;
5329
5330 /* Encode the offset. */
5331 insn |= residual >> 2;
5332
5333 bfd_put_32 (input_bfd, insn, hit_data);
5334 }
5335 return bfd_reloc_ok;
5336
5337 default:
5338 return bfd_reloc_notsupported;
5339 }
5340 }
5341
5342
5343 static int
5344 uleb128_size (unsigned int i)
5345 {
5346 int size;
5347 size = 1;
5348 while (i >= 0x80)
5349 {
5350 i >>= 7;
5351 size++;
5352 }
5353 return size;
5354 }
5355
5356 /* Return TRUE if the attribute has the default value (0/""). */
5357 static bfd_boolean
5358 is_default_attr (aeabi_attribute *attr)
5359 {
5360 if ((attr->type & 1) && attr->i != 0)
5361 return FALSE;
5362 if ((attr->type & 2) && attr->s && *attr->s)
5363 return FALSE;
5364
5365 return TRUE;
5366 }
5367
5368 /* Return the size of a single attribute. */
5369 static bfd_vma
5370 eabi_attr_size(int tag, aeabi_attribute *attr)
5371 {
5372 bfd_vma size;
5373
5374 if (is_default_attr (attr))
5375 return 0;
5376
5377 size = uleb128_size (tag);
5378 if (attr->type & 1)
5379 size += uleb128_size (attr->i);
5380 if (attr->type & 2)
5381 size += strlen ((char *)attr->s) + 1;
5382 return size;
5383 }
5384
5385 /* Returns the size of the eabi object attributess section. */
5386 bfd_vma
5387 elf32_arm_eabi_attr_size (bfd *abfd)
5388 {
5389 bfd_vma size;
5390 aeabi_attribute *attr;
5391 aeabi_attribute_list *list;
5392 int i;
5393
5394 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
5395 size = 16; /* 'A' <size> "aeabi" 0x1 <size>. */
5396 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
5397 size += eabi_attr_size (i, &attr[i]);
5398
5399 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
5400 list;
5401 list = list->next)
5402 size += eabi_attr_size (list->tag, &list->attr);
5403
5404 return size;
5405 }
5406
5407 static bfd_byte *
5408 write_uleb128 (bfd_byte *p, unsigned int val)
5409 {
5410 bfd_byte c;
5411 do
5412 {
5413 c = val & 0x7f;
5414 val >>= 7;
5415 if (val)
5416 c |= 0x80;
5417 *(p++) = c;
5418 }
5419 while (val);
5420 return p;
5421 }
5422
5423 /* Write attribute ATTR to butter P, and return a pointer to the following
5424 byte. */
5425 static bfd_byte *
5426 write_eabi_attribute (bfd_byte *p, int tag, aeabi_attribute *attr)
5427 {
5428 /* Suppress default entries. */
5429 if (is_default_attr(attr))
5430 return p;
5431
5432 p = write_uleb128 (p, tag);
5433 if (attr->type & 1)
5434 p = write_uleb128 (p, attr->i);
5435 if (attr->type & 2)
5436 {
5437 int len;
5438
5439 len = strlen (attr->s) + 1;
5440 memcpy (p, attr->s, len);
5441 p += len;
5442 }
5443
5444 return p;
5445 }
5446
5447 /* Write the contents of the eabi attributes section to p. */
5448 void
5449 elf32_arm_set_eabi_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size)
5450 {
5451 bfd_byte *p;
5452 aeabi_attribute *attr;
5453 aeabi_attribute_list *list;
5454 int i;
5455
5456 p = contents;
5457 *(p++) = 'A';
5458 bfd_put_32 (abfd, size - 1, p);
5459 p += 4;
5460 memcpy (p, "aeabi", 6);
5461 p += 6;
5462 *(p++) = Tag_File;
5463 bfd_put_32 (abfd, size - 11, p);
5464 p += 4;
5465
5466 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
5467 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
5468 p = write_eabi_attribute (p, i, &attr[i]);
5469
5470 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
5471 list;
5472 list = list->next)
5473 p = write_eabi_attribute (p, list->tag, &list->attr);
5474 }
5475
5476 /* Override final_link to handle EABI object attribute sections. */
5477
5478 static bfd_boolean
5479 elf32_arm_bfd_final_link (bfd *abfd, struct bfd_link_info *info)
5480 {
5481 asection *o;
5482 struct bfd_link_order *p;
5483 asection *attr_section = NULL;
5484 bfd_byte *contents;
5485 bfd_vma size = 0;
5486
5487 /* elf32_arm_merge_private_bfd_data will already have merged the
5488 object attributes. Remove the input sections from the link, and set
5489 the contents of the output secton. */
5490 for (o = abfd->sections; o != NULL; o = o->next)
5491 {
5492 if (strcmp (o->name, ".ARM.attributes") == 0)
5493 {
5494 for (p = o->map_head.link_order; p != NULL; p = p->next)
5495 {
5496 asection *input_section;
5497
5498 if (p->type != bfd_indirect_link_order)
5499 continue;
5500 input_section = p->u.indirect.section;
5501 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5502 elf_link_input_bfd ignores this section. */
5503 input_section->flags &= ~SEC_HAS_CONTENTS;
5504 }
5505
5506 size = elf32_arm_eabi_attr_size (abfd);
5507 bfd_set_section_size (abfd, o, size);
5508 attr_section = o;
5509 /* Skip this section later on. */
5510 o->map_head.link_order = NULL;
5511 }
5512 }
5513 /* Invoke the ELF linker to do all the work. */
5514 if (!bfd_elf_final_link (abfd, info))
5515 return FALSE;
5516
5517 if (attr_section)
5518 {
5519 contents = bfd_malloc(size);
5520 if (contents == NULL)
5521 return FALSE;
5522 elf32_arm_set_eabi_attr_contents (abfd, contents, size);
5523 bfd_set_section_contents (abfd, attr_section, contents, 0, size);
5524 free (contents);
5525 }
5526 return TRUE;
5527 }
5528
5529
5530 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
5531 static void
5532 arm_add_to_rel (bfd * abfd,
5533 bfd_byte * address,
5534 reloc_howto_type * howto,
5535 bfd_signed_vma increment)
5536 {
5537 bfd_signed_vma addend;
5538
5539 if (howto->type == R_ARM_THM_CALL)
5540 {
5541 int upper_insn, lower_insn;
5542 int upper, lower;
5543
5544 upper_insn = bfd_get_16 (abfd, address);
5545 lower_insn = bfd_get_16 (abfd, address + 2);
5546 upper = upper_insn & 0x7ff;
5547 lower = lower_insn & 0x7ff;
5548
5549 addend = (upper << 12) | (lower << 1);
5550 addend += increment;
5551 addend >>= 1;
5552
5553 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
5554 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
5555
5556 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
5557 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
5558 }
5559 else
5560 {
5561 bfd_vma contents;
5562
5563 contents = bfd_get_32 (abfd, address);
5564
5565 /* Get the (signed) value from the instruction. */
5566 addend = contents & howto->src_mask;
5567 if (addend & ((howto->src_mask + 1) >> 1))
5568 {
5569 bfd_signed_vma mask;
5570
5571 mask = -1;
5572 mask &= ~ howto->src_mask;
5573 addend |= mask;
5574 }
5575
5576 /* Add in the increment, (which is a byte value). */
5577 switch (howto->type)
5578 {
5579 default:
5580 addend += increment;
5581 break;
5582
5583 case R_ARM_PC24:
5584 case R_ARM_PLT32:
5585 case R_ARM_CALL:
5586 case R_ARM_JUMP24:
5587 addend <<= howto->size;
5588 addend += increment;
5589
5590 /* Should we check for overflow here ? */
5591
5592 /* Drop any undesired bits. */
5593 addend >>= howto->rightshift;
5594 break;
5595 }
5596
5597 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
5598
5599 bfd_put_32 (abfd, contents, address);
5600 }
5601 }
5602
5603 #define IS_ARM_TLS_RELOC(R_TYPE) \
5604 ((R_TYPE) == R_ARM_TLS_GD32 \
5605 || (R_TYPE) == R_ARM_TLS_LDO32 \
5606 || (R_TYPE) == R_ARM_TLS_LDM32 \
5607 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
5608 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
5609 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
5610 || (R_TYPE) == R_ARM_TLS_LE32 \
5611 || (R_TYPE) == R_ARM_TLS_IE32)
5612
5613 /* Relocate an ARM ELF section. */
5614 static bfd_boolean
5615 elf32_arm_relocate_section (bfd * output_bfd,
5616 struct bfd_link_info * info,
5617 bfd * input_bfd,
5618 asection * input_section,
5619 bfd_byte * contents,
5620 Elf_Internal_Rela * relocs,
5621 Elf_Internal_Sym * local_syms,
5622 asection ** local_sections)
5623 {
5624 Elf_Internal_Shdr *symtab_hdr;
5625 struct elf_link_hash_entry **sym_hashes;
5626 Elf_Internal_Rela *rel;
5627 Elf_Internal_Rela *relend;
5628 const char *name;
5629 struct elf32_arm_link_hash_table * globals;
5630
5631 globals = elf32_arm_hash_table (info);
5632 if (info->relocatable && !globals->use_rel)
5633 return TRUE;
5634
5635 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
5636 sym_hashes = elf_sym_hashes (input_bfd);
5637
5638 rel = relocs;
5639 relend = relocs + input_section->reloc_count;
5640 for (; rel < relend; rel++)
5641 {
5642 int r_type;
5643 reloc_howto_type * howto;
5644 unsigned long r_symndx;
5645 Elf_Internal_Sym * sym;
5646 asection * sec;
5647 struct elf_link_hash_entry * h;
5648 bfd_vma relocation;
5649 bfd_reloc_status_type r;
5650 arelent bfd_reloc;
5651 char sym_type;
5652 bfd_boolean unresolved_reloc = FALSE;
5653 char *error_message = NULL;
5654
5655 r_symndx = ELF32_R_SYM (rel->r_info);
5656 r_type = ELF32_R_TYPE (rel->r_info);
5657 r_type = arm_real_reloc_type (globals, r_type);
5658
5659 if ( r_type == R_ARM_GNU_VTENTRY
5660 || r_type == R_ARM_GNU_VTINHERIT)
5661 continue;
5662
5663 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
5664 howto = bfd_reloc.howto;
5665
5666 if (info->relocatable && globals->use_rel)
5667 {
5668 /* This is a relocatable link. We don't have to change
5669 anything, unless the reloc is against a section symbol,
5670 in which case we have to adjust according to where the
5671 section symbol winds up in the output section. */
5672 if (r_symndx < symtab_hdr->sh_info)
5673 {
5674 sym = local_syms + r_symndx;
5675 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
5676 {
5677 sec = local_sections[r_symndx];
5678 arm_add_to_rel (input_bfd, contents + rel->r_offset,
5679 howto,
5680 (bfd_signed_vma) (sec->output_offset
5681 + sym->st_value));
5682 }
5683 }
5684
5685 continue;
5686 }
5687
5688 /* This is a final link. */
5689 h = NULL;
5690 sym = NULL;
5691 sec = NULL;
5692
5693 if (r_symndx < symtab_hdr->sh_info)
5694 {
5695 sym = local_syms + r_symndx;
5696 sym_type = ELF32_ST_TYPE (sym->st_info);
5697 sec = local_sections[r_symndx];
5698 if (globals->use_rel)
5699 {
5700 relocation = (sec->output_section->vma
5701 + sec->output_offset
5702 + sym->st_value);
5703 if ((sec->flags & SEC_MERGE)
5704 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
5705 {
5706 asection *msec;
5707 bfd_vma addend, value;
5708
5709 if (howto->rightshift)
5710 {
5711 (*_bfd_error_handler)
5712 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
5713 input_bfd, input_section,
5714 (long) rel->r_offset, howto->name);
5715 return FALSE;
5716 }
5717
5718 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
5719
5720 /* Get the (signed) value from the instruction. */
5721 addend = value & howto->src_mask;
5722 if (addend & ((howto->src_mask + 1) >> 1))
5723 {
5724 bfd_signed_vma mask;
5725
5726 mask = -1;
5727 mask &= ~ howto->src_mask;
5728 addend |= mask;
5729 }
5730 msec = sec;
5731 addend =
5732 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
5733 - relocation;
5734 addend += msec->output_section->vma + msec->output_offset;
5735 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
5736 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
5737 }
5738 }
5739 else
5740 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5741 }
5742 else
5743 {
5744 bfd_boolean warned;
5745
5746 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5747 r_symndx, symtab_hdr, sym_hashes,
5748 h, sec, relocation,
5749 unresolved_reloc, warned);
5750
5751 sym_type = h->type;
5752 }
5753
5754 if (h != NULL)
5755 name = h->root.root.string;
5756 else
5757 {
5758 name = (bfd_elf_string_from_elf_section
5759 (input_bfd, symtab_hdr->sh_link, sym->st_name));
5760 if (name == NULL || *name == '\0')
5761 name = bfd_section_name (input_bfd, sec);
5762 }
5763
5764 if (r_symndx != 0
5765 && r_type != R_ARM_NONE
5766 && (h == NULL
5767 || h->root.type == bfd_link_hash_defined
5768 || h->root.type == bfd_link_hash_defweak)
5769 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
5770 {
5771 (*_bfd_error_handler)
5772 ((sym_type == STT_TLS
5773 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
5774 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
5775 input_bfd,
5776 input_section,
5777 (long) rel->r_offset,
5778 howto->name,
5779 name);
5780 }
5781
5782 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
5783 input_section, contents, rel,
5784 relocation, info, sec, name,
5785 (h ? ELF_ST_TYPE (h->type) :
5786 ELF_ST_TYPE (sym->st_info)), h,
5787 &unresolved_reloc, &error_message);
5788
5789 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5790 because such sections are not SEC_ALLOC and thus ld.so will
5791 not process them. */
5792 if (unresolved_reloc
5793 && !((input_section->flags & SEC_DEBUGGING) != 0
5794 && h->def_dynamic))
5795 {
5796 (*_bfd_error_handler)
5797 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5798 input_bfd,
5799 input_section,
5800 (long) rel->r_offset,
5801 howto->name,
5802 h->root.root.string);
5803 return FALSE;
5804 }
5805
5806 if (r != bfd_reloc_ok)
5807 {
5808 switch (r)
5809 {
5810 case bfd_reloc_overflow:
5811 /* If the overflowing reloc was to an undefined symbol,
5812 we have already printed one error message and there
5813 is no point complaining again. */
5814 if ((! h ||
5815 h->root.type != bfd_link_hash_undefined)
5816 && (!((*info->callbacks->reloc_overflow)
5817 (info, (h ? &h->root : NULL), name, howto->name,
5818 (bfd_vma) 0, input_bfd, input_section,
5819 rel->r_offset))))
5820 return FALSE;
5821 break;
5822
5823 case bfd_reloc_undefined:
5824 if (!((*info->callbacks->undefined_symbol)
5825 (info, name, input_bfd, input_section,
5826 rel->r_offset, TRUE)))
5827 return FALSE;
5828 break;
5829
5830 case bfd_reloc_outofrange:
5831 error_message = _("out of range");
5832 goto common_error;
5833
5834 case bfd_reloc_notsupported:
5835 error_message = _("unsupported relocation");
5836 goto common_error;
5837
5838 case bfd_reloc_dangerous:
5839 /* error_message should already be set. */
5840 goto common_error;
5841
5842 default:
5843 error_message = _("unknown error");
5844 /* fall through */
5845
5846 common_error:
5847 BFD_ASSERT (error_message != NULL);
5848 if (!((*info->callbacks->reloc_dangerous)
5849 (info, error_message, input_bfd, input_section,
5850 rel->r_offset)))
5851 return FALSE;
5852 break;
5853 }
5854 }
5855 }
5856
5857 return TRUE;
5858 }
5859
5860 /* Allocate/find an object attribute. */
5861 static aeabi_attribute *
5862 elf32_arm_new_eabi_attr (bfd *abfd, int tag)
5863 {
5864 aeabi_attribute *attr;
5865 aeabi_attribute_list *list;
5866 aeabi_attribute_list *p;
5867 aeabi_attribute_list **lastp;
5868
5869
5870 if (tag < NUM_KNOWN_ATTRIBUTES)
5871 {
5872 /* Knwon tags are preallocated. */
5873 attr = &elf32_arm_tdata (abfd)->known_eabi_attributes[tag];
5874 }
5875 else
5876 {
5877 /* Create a new tag. */
5878 list = (aeabi_attribute_list *)
5879 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
5880 memset (list, 0, sizeof (aeabi_attribute_list));
5881 list->tag = tag;
5882 /* Keep the tag list in order. */
5883 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
5884 for (p = *lastp; p; p = p->next)
5885 {
5886 if (tag < p->tag)
5887 break;
5888 lastp = &p->next;
5889 }
5890 list->next = *lastp;
5891 *lastp = list;
5892 attr = &list->attr;
5893 }
5894
5895 return attr;
5896 }
5897
5898 int
5899 elf32_arm_get_eabi_attr_int (bfd *abfd, int tag)
5900 {
5901 aeabi_attribute_list *p;
5902
5903 if (tag < NUM_KNOWN_ATTRIBUTES)
5904 {
5905 /* Knwon tags are preallocated. */
5906 return elf32_arm_tdata (abfd)->known_eabi_attributes[tag].i;
5907 }
5908 else
5909 {
5910 for (p = elf32_arm_tdata (abfd)->other_eabi_attributes;
5911 p;
5912 p = p->next)
5913 {
5914 if (tag == p->tag)
5915 return p->attr.i;
5916 if (tag < p->tag)
5917 break;
5918 }
5919 return 0;
5920 }
5921 }
5922
5923 void
5924 elf32_arm_add_eabi_attr_int (bfd *abfd, int tag, unsigned int i)
5925 {
5926 aeabi_attribute *attr;
5927
5928 attr = elf32_arm_new_eabi_attr (abfd, tag);
5929 attr->type = 1;
5930 attr->i = i;
5931 }
5932
5933 static char *
5934 attr_strdup (bfd *abfd, const char * s)
5935 {
5936 char * p;
5937 int len;
5938
5939 len = strlen (s) + 1;
5940 p = (char *)bfd_alloc(abfd, len);
5941 return memcpy (p, s, len);
5942 }
5943
5944 void
5945 elf32_arm_add_eabi_attr_string (bfd *abfd, int tag, const char *s)
5946 {
5947 aeabi_attribute *attr;
5948
5949 attr = elf32_arm_new_eabi_attr (abfd, tag);
5950 attr->type = 2;
5951 attr->s = attr_strdup (abfd, s);
5952 }
5953
5954 void
5955 elf32_arm_add_eabi_attr_compat (bfd *abfd, unsigned int i, const char *s)
5956 {
5957 aeabi_attribute_list *list;
5958 aeabi_attribute_list *p;
5959 aeabi_attribute_list **lastp;
5960
5961 list = (aeabi_attribute_list *)
5962 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
5963 memset (list, 0, sizeof (aeabi_attribute_list));
5964 list->tag = Tag_compatibility;
5965 list->attr.type = 3;
5966 list->attr.i = i;
5967 list->attr.s = attr_strdup (abfd, s);
5968
5969 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
5970 for (p = *lastp; p; p = p->next)
5971 {
5972 int cmp;
5973 if (p->tag != Tag_compatibility)
5974 break;
5975 cmp = strcmp(s, p->attr.s);
5976 if (cmp < 0 || (cmp == 0 && i < p->attr.i))
5977 break;
5978 lastp = &p->next;
5979 }
5980 list->next = *lastp;
5981 *lastp = list;
5982 }
5983
5984 /* Set the right machine number. */
5985
5986 static bfd_boolean
5987 elf32_arm_object_p (bfd *abfd)
5988 {
5989 unsigned int mach;
5990
5991 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
5992
5993 if (mach != bfd_mach_arm_unknown)
5994 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
5995
5996 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
5997 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
5998
5999 else
6000 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6001
6002 return TRUE;
6003 }
6004
6005 /* Function to keep ARM specific flags in the ELF header. */
6006
6007 static bfd_boolean
6008 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
6009 {
6010 if (elf_flags_init (abfd)
6011 && elf_elfheader (abfd)->e_flags != flags)
6012 {
6013 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
6014 {
6015 if (flags & EF_ARM_INTERWORK)
6016 (*_bfd_error_handler)
6017 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
6018 abfd);
6019 else
6020 _bfd_error_handler
6021 (_("Warning: Clearing the interworking flag of %B due to outside request"),
6022 abfd);
6023 }
6024 }
6025 else
6026 {
6027 elf_elfheader (abfd)->e_flags = flags;
6028 elf_flags_init (abfd) = TRUE;
6029 }
6030
6031 return TRUE;
6032 }
6033
6034 /* Copy the eabi object attribute from IBFD to OBFD. */
6035 static void
6036 copy_eabi_attributes (bfd *ibfd, bfd *obfd)
6037 {
6038 aeabi_attribute *in_attr;
6039 aeabi_attribute *out_attr;
6040 aeabi_attribute_list *list;
6041 int i;
6042
6043 in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
6044 out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
6045 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
6046 {
6047 out_attr->i = in_attr->i;
6048 if (in_attr->s && *in_attr->s)
6049 out_attr->s = attr_strdup (obfd, in_attr->s);
6050 in_attr++;
6051 out_attr++;
6052 }
6053
6054 for (list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
6055 list;
6056 list = list->next)
6057 {
6058 in_attr = &list->attr;
6059 switch (in_attr->type)
6060 {
6061 case 1:
6062 elf32_arm_add_eabi_attr_int (obfd, list->tag, in_attr->i);
6063 break;
6064 case 2:
6065 elf32_arm_add_eabi_attr_string (obfd, list->tag, in_attr->s);
6066 break;
6067 case 3:
6068 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
6069 break;
6070 default:
6071 abort();
6072 }
6073 }
6074 }
6075
6076
6077 /* Copy backend specific data from one object module to another. */
6078
6079 static bfd_boolean
6080 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6081 {
6082 flagword in_flags;
6083 flagword out_flags;
6084
6085 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6086 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6087 return TRUE;
6088
6089 in_flags = elf_elfheader (ibfd)->e_flags;
6090 out_flags = elf_elfheader (obfd)->e_flags;
6091
6092 if (elf_flags_init (obfd)
6093 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
6094 && in_flags != out_flags)
6095 {
6096 /* Cannot mix APCS26 and APCS32 code. */
6097 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
6098 return FALSE;
6099
6100 /* Cannot mix float APCS and non-float APCS code. */
6101 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
6102 return FALSE;
6103
6104 /* If the src and dest have different interworking flags
6105 then turn off the interworking bit. */
6106 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
6107 {
6108 if (out_flags & EF_ARM_INTERWORK)
6109 _bfd_error_handler
6110 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
6111 obfd, ibfd);
6112
6113 in_flags &= ~EF_ARM_INTERWORK;
6114 }
6115
6116 /* Likewise for PIC, though don't warn for this case. */
6117 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
6118 in_flags &= ~EF_ARM_PIC;
6119 }
6120
6121 elf_elfheader (obfd)->e_flags = in_flags;
6122 elf_flags_init (obfd) = TRUE;
6123
6124 /* Also copy the EI_OSABI field. */
6125 elf_elfheader (obfd)->e_ident[EI_OSABI] =
6126 elf_elfheader (ibfd)->e_ident[EI_OSABI];
6127
6128 /* Copy EABI object attributes. */
6129 copy_eabi_attributes (ibfd, obfd);
6130
6131 return TRUE;
6132 }
6133
6134 /* Values for Tag_ABI_PCS_R9_use. */
6135 enum
6136 {
6137 AEABI_R9_V6,
6138 AEABI_R9_SB,
6139 AEABI_R9_TLS,
6140 AEABI_R9_unused
6141 };
6142
6143 /* Values for Tag_ABI_PCS_RW_data. */
6144 enum
6145 {
6146 AEABI_PCS_RW_data_absolute,
6147 AEABI_PCS_RW_data_PCrel,
6148 AEABI_PCS_RW_data_SBrel,
6149 AEABI_PCS_RW_data_unused
6150 };
6151
6152 /* Values for Tag_ABI_enum_size. */
6153 enum
6154 {
6155 AEABI_enum_unused,
6156 AEABI_enum_short,
6157 AEABI_enum_wide,
6158 AEABI_enum_forced_wide
6159 };
6160
6161 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
6162 are conflicting attributes. */
6163 static bfd_boolean
6164 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
6165 {
6166 aeabi_attribute *in_attr;
6167 aeabi_attribute *out_attr;
6168 aeabi_attribute_list *in_list;
6169 aeabi_attribute_list *out_list;
6170 /* Some tags have 0 = don't care, 1 = strong requirement,
6171 2 = weak requirement. */
6172 static const int order_312[3] = {3, 1, 2};
6173 int i;
6174
6175 if (!elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i)
6176 {
6177 /* This is the first object. Copy the attributes. */
6178 copy_eabi_attributes (ibfd, obfd);
6179 return TRUE;
6180 }
6181
6182 /* Use the Tag_null value to indicate the attributes have been
6183 initialized. */
6184 elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i = 1;
6185
6186 in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
6187 out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
6188 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
6189 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
6190 {
6191 /* Ignore mismatches if teh object doesn't use floating point. */
6192 if (out_attr[Tag_ABI_FP_number_model].i == 0)
6193 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
6194 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
6195 {
6196 _bfd_error_handler
6197 (_("ERROR: %B uses VFP register arguments, %B does not"),
6198 ibfd, obfd);
6199 return FALSE;
6200 }
6201 }
6202
6203 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
6204 {
6205 /* Merge this attribute with existing attributes. */
6206 switch (i)
6207 {
6208 case Tag_CPU_raw_name:
6209 case Tag_CPU_name:
6210 /* Use whichever has the greatest architecture requirements. */
6211 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i)
6212 out_attr[i].s = attr_strdup(obfd, in_attr[i].s);
6213 break;
6214
6215 case Tag_ABI_optimization_goals:
6216 case Tag_ABI_FP_optimization_goals:
6217 /* Use the first value seen. */
6218 break;
6219
6220 case Tag_CPU_arch:
6221 case Tag_ARM_ISA_use:
6222 case Tag_THUMB_ISA_use:
6223 case Tag_VFP_arch:
6224 case Tag_WMMX_arch:
6225 case Tag_NEON_arch:
6226 /* ??? Do NEON and WMMX conflict? */
6227 case Tag_ABI_FP_rounding:
6228 case Tag_ABI_FP_denormal:
6229 case Tag_ABI_FP_exceptions:
6230 case Tag_ABI_FP_user_exceptions:
6231 case Tag_ABI_FP_number_model:
6232 case Tag_ABI_align8_preserved:
6233 case Tag_ABI_HardFP_use:
6234 /* Use the largest value specified. */
6235 if (in_attr[i].i > out_attr[i].i)
6236 out_attr[i].i = in_attr[i].i;
6237 break;
6238
6239 case Tag_CPU_arch_profile:
6240 /* Warn if conflicting architecture profiles used. */
6241 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
6242 {
6243 _bfd_error_handler
6244 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
6245 ibfd, in_attr[i].i, out_attr[i].i);
6246 return FALSE;
6247 }
6248 if (in_attr[i].i)
6249 out_attr[i].i = in_attr[i].i;
6250 break;
6251 case Tag_PCS_config:
6252 if (out_attr[i].i == 0)
6253 out_attr[i].i = in_attr[i].i;
6254 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
6255 {
6256 /* It's sometimes ok to mix different configs, so this is only
6257 a warning. */
6258 _bfd_error_handler
6259 (_("Warning: %B: Conflicting platform configuration"), ibfd);
6260 }
6261 break;
6262 case Tag_ABI_PCS_R9_use:
6263 if (out_attr[i].i != AEABI_R9_unused
6264 && in_attr[i].i != AEABI_R9_unused)
6265 {
6266 _bfd_error_handler
6267 (_("ERROR: %B: Conflicting use of R9"), ibfd);
6268 return FALSE;
6269 }
6270 if (out_attr[i].i == AEABI_R9_unused)
6271 out_attr[i].i = in_attr[i].i;
6272 break;
6273 case Tag_ABI_PCS_RW_data:
6274 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
6275 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
6276 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
6277 {
6278 _bfd_error_handler
6279 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
6280 ibfd);
6281 return FALSE;
6282 }
6283 /* Use the smallest value specified. */
6284 if (in_attr[i].i < out_attr[i].i)
6285 out_attr[i].i = in_attr[i].i;
6286 break;
6287 case Tag_ABI_PCS_RO_data:
6288 /* Use the smallest value specified. */
6289 if (in_attr[i].i < out_attr[i].i)
6290 out_attr[i].i = in_attr[i].i;
6291 break;
6292 case Tag_ABI_PCS_GOT_use:
6293 if (in_attr[i].i > 2 || out_attr[i].i > 2
6294 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
6295 out_attr[i].i = in_attr[i].i;
6296 break;
6297 case Tag_ABI_PCS_wchar_t:
6298 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
6299 {
6300 _bfd_error_handler
6301 (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
6302 return FALSE;
6303 }
6304 if (in_attr[i].i)
6305 out_attr[i].i = in_attr[i].i;
6306 break;
6307 case Tag_ABI_align8_needed:
6308 /* ??? Check against Tag_ABI_align8_preserved. */
6309 if (in_attr[i].i > 2 || out_attr[i].i > 2
6310 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
6311 out_attr[i].i = in_attr[i].i;
6312 break;
6313 case Tag_ABI_enum_size:
6314 if (in_attr[i].i != AEABI_enum_unused)
6315 {
6316 if (out_attr[i].i == AEABI_enum_unused
6317 || out_attr[i].i == AEABI_enum_forced_wide)
6318 {
6319 /* The existing object is compatible with anything.
6320 Use whatever requirements the new object has. */
6321 out_attr[i].i = in_attr[i].i;
6322 }
6323 else if (in_attr[i].i != AEABI_enum_forced_wide
6324 && out_attr[i].i != in_attr[i].i)
6325 {
6326 _bfd_error_handler
6327 (_("ERROR: %B: Conflicting enum sizes"), ibfd);
6328 }
6329 }
6330 break;
6331 case Tag_ABI_VFP_args:
6332 /* Aready done. */
6333 break;
6334 case Tag_ABI_WMMX_args:
6335 if (in_attr[i].i != out_attr[i].i)
6336 {
6337 _bfd_error_handler
6338 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
6339 ibfd, obfd);
6340 return FALSE;
6341 }
6342 break;
6343 default: /* All known attributes should be explicitly covered. */
6344 abort ();
6345 }
6346 }
6347
6348 in_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
6349 out_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
6350 while (in_list && in_list->tag == Tag_compatibility)
6351 {
6352 in_attr = &in_list->attr;
6353 if (in_attr->i == 0)
6354 continue;
6355 if (in_attr->i == 1)
6356 {
6357 _bfd_error_handler
6358 (_("ERROR: %B: Must be processed by '%s' toolchain"),
6359 ibfd, in_attr->s);
6360 return FALSE;
6361 }
6362 if (!out_list || out_list->tag != Tag_compatibility
6363 || strcmp (in_attr->s, out_list->attr.s) != 0)
6364 {
6365 /* Add this compatibility tag to the output. */
6366 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
6367 continue;
6368 }
6369 out_attr = &out_list->attr;
6370 /* Check all the input tags with the same identifier. */
6371 for (;;)
6372 {
6373 if (out_list->tag != Tag_compatibility
6374 || in_attr->i != out_attr->i
6375 || strcmp (in_attr->s, out_attr->s) != 0)
6376 {
6377 _bfd_error_handler
6378 (_("ERROR: %B: Incompatible object tag '%s':%d"),
6379 ibfd, in_attr->s, in_attr->i);
6380 return FALSE;
6381 }
6382 in_list = in_list->next;
6383 if (in_list->tag != Tag_compatibility
6384 || strcmp (in_attr->s, in_list->attr.s) != 0)
6385 break;
6386 in_attr = &in_list->attr;
6387 out_list = out_list->next;
6388 if (out_list)
6389 out_attr = &out_list->attr;
6390 }
6391
6392 /* Check the output doesn't have extra tags with this identifier. */
6393 if (out_list && out_list->tag == Tag_compatibility
6394 && strcmp (in_attr->s, out_list->attr.s) == 0)
6395 {
6396 _bfd_error_handler
6397 (_("ERROR: %B: Incompatible object tag '%s':%d"),
6398 ibfd, in_attr->s, out_list->attr.i);
6399 return FALSE;
6400 }
6401 }
6402
6403 for (; in_list; in_list = in_list->next)
6404 {
6405 if ((in_list->tag & 128) < 64)
6406 {
6407 _bfd_error_handler
6408 (_("Warning: %B: Unknown EABI object attribute %d"),
6409 ibfd, in_list->tag);
6410 break;
6411 }
6412 }
6413 return TRUE;
6414 }
6415
6416
6417 /* Return TRUE if the two EABI versions are incompatible. */
6418
6419 static bfd_boolean
6420 elf32_arm_versions_compatible (unsigned iver, unsigned over)
6421 {
6422 /* v4 and v5 are the same spec before and after it was released,
6423 so allow mixing them. */
6424 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
6425 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
6426 return TRUE;
6427
6428 return (iver == over);
6429 }
6430
6431 /* Merge backend specific data from an object file to the output
6432 object file when linking. */
6433
6434 static bfd_boolean
6435 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
6436 {
6437 flagword out_flags;
6438 flagword in_flags;
6439 bfd_boolean flags_compatible = TRUE;
6440 asection *sec;
6441
6442 /* Check if we have the same endianess. */
6443 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
6444 return FALSE;
6445
6446 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6447 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6448 return TRUE;
6449
6450 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
6451 return FALSE;
6452
6453 /* The input BFD must have had its flags initialised. */
6454 /* The following seems bogus to me -- The flags are initialized in
6455 the assembler but I don't think an elf_flags_init field is
6456 written into the object. */
6457 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6458
6459 in_flags = elf_elfheader (ibfd)->e_flags;
6460 out_flags = elf_elfheader (obfd)->e_flags;
6461
6462 if (!elf_flags_init (obfd))
6463 {
6464 /* If the input is the default architecture and had the default
6465 flags then do not bother setting the flags for the output
6466 architecture, instead allow future merges to do this. If no
6467 future merges ever set these flags then they will retain their
6468 uninitialised values, which surprise surprise, correspond
6469 to the default values. */
6470 if (bfd_get_arch_info (ibfd)->the_default
6471 && elf_elfheader (ibfd)->e_flags == 0)
6472 return TRUE;
6473
6474 elf_flags_init (obfd) = TRUE;
6475 elf_elfheader (obfd)->e_flags = in_flags;
6476
6477 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
6478 && bfd_get_arch_info (obfd)->the_default)
6479 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
6480
6481 return TRUE;
6482 }
6483
6484 /* Determine what should happen if the input ARM architecture
6485 does not match the output ARM architecture. */
6486 if (! bfd_arm_merge_machines (ibfd, obfd))
6487 return FALSE;
6488
6489 /* Identical flags must be compatible. */
6490 if (in_flags == out_flags)
6491 return TRUE;
6492
6493 /* Check to see if the input BFD actually contains any sections. If
6494 not, its flags may not have been initialised either, but it
6495 cannot actually cause any incompatiblity. Do not short-circuit
6496 dynamic objects; their section list may be emptied by
6497 elf_link_add_object_symbols.
6498
6499 Also check to see if there are no code sections in the input.
6500 In this case there is no need to check for code specific flags.
6501 XXX - do we need to worry about floating-point format compatability
6502 in data sections ? */
6503 if (!(ibfd->flags & DYNAMIC))
6504 {
6505 bfd_boolean null_input_bfd = TRUE;
6506 bfd_boolean only_data_sections = TRUE;
6507
6508 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6509 {
6510 /* Ignore synthetic glue sections. */
6511 if (strcmp (sec->name, ".glue_7")
6512 && strcmp (sec->name, ".glue_7t"))
6513 {
6514 if ((bfd_get_section_flags (ibfd, sec)
6515 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
6516 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
6517 only_data_sections = FALSE;
6518
6519 null_input_bfd = FALSE;
6520 break;
6521 }
6522 }
6523
6524 if (null_input_bfd || only_data_sections)
6525 return TRUE;
6526 }
6527
6528 /* Complain about various flag mismatches. */
6529 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
6530 EF_ARM_EABI_VERSION (out_flags)))
6531 {
6532 _bfd_error_handler
6533 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
6534 ibfd, obfd,
6535 (in_flags & EF_ARM_EABIMASK) >> 24,
6536 (out_flags & EF_ARM_EABIMASK) >> 24);
6537 return FALSE;
6538 }
6539
6540 /* Not sure what needs to be checked for EABI versions >= 1. */
6541 /* VxWorks libraries do not use these flags. */
6542 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
6543 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
6544 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
6545 {
6546 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
6547 {
6548 _bfd_error_handler
6549 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
6550 ibfd, obfd,
6551 in_flags & EF_ARM_APCS_26 ? 26 : 32,
6552 out_flags & EF_ARM_APCS_26 ? 26 : 32);
6553 flags_compatible = FALSE;
6554 }
6555
6556 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
6557 {
6558 if (in_flags & EF_ARM_APCS_FLOAT)
6559 _bfd_error_handler
6560 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
6561 ibfd, obfd);
6562 else
6563 _bfd_error_handler
6564 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
6565 ibfd, obfd);
6566
6567 flags_compatible = FALSE;
6568 }
6569
6570 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
6571 {
6572 if (in_flags & EF_ARM_VFP_FLOAT)
6573 _bfd_error_handler
6574 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
6575 ibfd, obfd);
6576 else
6577 _bfd_error_handler
6578 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
6579 ibfd, obfd);
6580
6581 flags_compatible = FALSE;
6582 }
6583
6584 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
6585 {
6586 if (in_flags & EF_ARM_MAVERICK_FLOAT)
6587 _bfd_error_handler
6588 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
6589 ibfd, obfd);
6590 else
6591 _bfd_error_handler
6592 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
6593 ibfd, obfd);
6594
6595 flags_compatible = FALSE;
6596 }
6597
6598 #ifdef EF_ARM_SOFT_FLOAT
6599 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
6600 {
6601 /* We can allow interworking between code that is VFP format
6602 layout, and uses either soft float or integer regs for
6603 passing floating point arguments and results. We already
6604 know that the APCS_FLOAT flags match; similarly for VFP
6605 flags. */
6606 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
6607 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
6608 {
6609 if (in_flags & EF_ARM_SOFT_FLOAT)
6610 _bfd_error_handler
6611 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
6612 ibfd, obfd);
6613 else
6614 _bfd_error_handler
6615 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
6616 ibfd, obfd);
6617
6618 flags_compatible = FALSE;
6619 }
6620 }
6621 #endif
6622
6623 /* Interworking mismatch is only a warning. */
6624 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
6625 {
6626 if (in_flags & EF_ARM_INTERWORK)
6627 {
6628 _bfd_error_handler
6629 (_("Warning: %B supports interworking, whereas %B does not"),
6630 ibfd, obfd);
6631 }
6632 else
6633 {
6634 _bfd_error_handler
6635 (_("Warning: %B does not support interworking, whereas %B does"),
6636 ibfd, obfd);
6637 }
6638 }
6639 }
6640
6641 return flags_compatible;
6642 }
6643
6644 /* Display the flags field. */
6645
6646 static bfd_boolean
6647 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
6648 {
6649 FILE * file = (FILE *) ptr;
6650 unsigned long flags;
6651
6652 BFD_ASSERT (abfd != NULL && ptr != NULL);
6653
6654 /* Print normal ELF private data. */
6655 _bfd_elf_print_private_bfd_data (abfd, ptr);
6656
6657 flags = elf_elfheader (abfd)->e_flags;
6658 /* Ignore init flag - it may not be set, despite the flags field
6659 containing valid data. */
6660
6661 /* xgettext:c-format */
6662 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
6663
6664 switch (EF_ARM_EABI_VERSION (flags))
6665 {
6666 case EF_ARM_EABI_UNKNOWN:
6667 /* The following flag bits are GNU extensions and not part of the
6668 official ARM ELF extended ABI. Hence they are only decoded if
6669 the EABI version is not set. */
6670 if (flags & EF_ARM_INTERWORK)
6671 fprintf (file, _(" [interworking enabled]"));
6672
6673 if (flags & EF_ARM_APCS_26)
6674 fprintf (file, " [APCS-26]");
6675 else
6676 fprintf (file, " [APCS-32]");
6677
6678 if (flags & EF_ARM_VFP_FLOAT)
6679 fprintf (file, _(" [VFP float format]"));
6680 else if (flags & EF_ARM_MAVERICK_FLOAT)
6681 fprintf (file, _(" [Maverick float format]"));
6682 else
6683 fprintf (file, _(" [FPA float format]"));
6684
6685 if (flags & EF_ARM_APCS_FLOAT)
6686 fprintf (file, _(" [floats passed in float registers]"));
6687
6688 if (flags & EF_ARM_PIC)
6689 fprintf (file, _(" [position independent]"));
6690
6691 if (flags & EF_ARM_NEW_ABI)
6692 fprintf (file, _(" [new ABI]"));
6693
6694 if (flags & EF_ARM_OLD_ABI)
6695 fprintf (file, _(" [old ABI]"));
6696
6697 if (flags & EF_ARM_SOFT_FLOAT)
6698 fprintf (file, _(" [software FP]"));
6699
6700 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
6701 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
6702 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
6703 | EF_ARM_MAVERICK_FLOAT);
6704 break;
6705
6706 case EF_ARM_EABI_VER1:
6707 fprintf (file, _(" [Version1 EABI]"));
6708
6709 if (flags & EF_ARM_SYMSARESORTED)
6710 fprintf (file, _(" [sorted symbol table]"));
6711 else
6712 fprintf (file, _(" [unsorted symbol table]"));
6713
6714 flags &= ~ EF_ARM_SYMSARESORTED;
6715 break;
6716
6717 case EF_ARM_EABI_VER2:
6718 fprintf (file, _(" [Version2 EABI]"));
6719
6720 if (flags & EF_ARM_SYMSARESORTED)
6721 fprintf (file, _(" [sorted symbol table]"));
6722 else
6723 fprintf (file, _(" [unsorted symbol table]"));
6724
6725 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
6726 fprintf (file, _(" [dynamic symbols use segment index]"));
6727
6728 if (flags & EF_ARM_MAPSYMSFIRST)
6729 fprintf (file, _(" [mapping symbols precede others]"));
6730
6731 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
6732 | EF_ARM_MAPSYMSFIRST);
6733 break;
6734
6735 case EF_ARM_EABI_VER3:
6736 fprintf (file, _(" [Version3 EABI]"));
6737 break;
6738
6739 case EF_ARM_EABI_VER4:
6740 fprintf (file, _(" [Version4 EABI]"));
6741 goto eabi;
6742
6743 case EF_ARM_EABI_VER5:
6744 fprintf (file, _(" [Version5 EABI]"));
6745 eabi:
6746 if (flags & EF_ARM_BE8)
6747 fprintf (file, _(" [BE8]"));
6748
6749 if (flags & EF_ARM_LE8)
6750 fprintf (file, _(" [LE8]"));
6751
6752 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
6753 break;
6754
6755 default:
6756 fprintf (file, _(" <EABI version unrecognised>"));
6757 break;
6758 }
6759
6760 flags &= ~ EF_ARM_EABIMASK;
6761
6762 if (flags & EF_ARM_RELEXEC)
6763 fprintf (file, _(" [relocatable executable]"));
6764
6765 if (flags & EF_ARM_HASENTRY)
6766 fprintf (file, _(" [has entry point]"));
6767
6768 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
6769
6770 if (flags)
6771 fprintf (file, _("<Unrecognised flag bits set>"));
6772
6773 fputc ('\n', file);
6774
6775 return TRUE;
6776 }
6777
6778 static int
6779 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
6780 {
6781 switch (ELF_ST_TYPE (elf_sym->st_info))
6782 {
6783 case STT_ARM_TFUNC:
6784 return ELF_ST_TYPE (elf_sym->st_info);
6785
6786 case STT_ARM_16BIT:
6787 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
6788 This allows us to distinguish between data used by Thumb instructions
6789 and non-data (which is probably code) inside Thumb regions of an
6790 executable. */
6791 if (type != STT_OBJECT && type != STT_TLS)
6792 return ELF_ST_TYPE (elf_sym->st_info);
6793 break;
6794
6795 default:
6796 break;
6797 }
6798
6799 return type;
6800 }
6801
6802 static asection *
6803 elf32_arm_gc_mark_hook (asection *sec,
6804 struct bfd_link_info *info,
6805 Elf_Internal_Rela *rel,
6806 struct elf_link_hash_entry *h,
6807 Elf_Internal_Sym *sym)
6808 {
6809 if (h != NULL)
6810 switch (ELF32_R_TYPE (rel->r_info))
6811 {
6812 case R_ARM_GNU_VTINHERIT:
6813 case R_ARM_GNU_VTENTRY:
6814 return NULL;
6815 }
6816
6817 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6818 }
6819
6820 /* Update the got entry reference counts for the section being removed. */
6821
6822 static bfd_boolean
6823 elf32_arm_gc_sweep_hook (bfd * abfd,
6824 struct bfd_link_info * info,
6825 asection * sec,
6826 const Elf_Internal_Rela * relocs)
6827 {
6828 Elf_Internal_Shdr *symtab_hdr;
6829 struct elf_link_hash_entry **sym_hashes;
6830 bfd_signed_vma *local_got_refcounts;
6831 const Elf_Internal_Rela *rel, *relend;
6832 struct elf32_arm_link_hash_table * globals;
6833
6834 globals = elf32_arm_hash_table (info);
6835
6836 elf_section_data (sec)->local_dynrel = NULL;
6837
6838 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6839 sym_hashes = elf_sym_hashes (abfd);
6840 local_got_refcounts = elf_local_got_refcounts (abfd);
6841
6842 relend = relocs + sec->reloc_count;
6843 for (rel = relocs; rel < relend; rel++)
6844 {
6845 unsigned long r_symndx;
6846 struct elf_link_hash_entry *h = NULL;
6847 int r_type;
6848
6849 r_symndx = ELF32_R_SYM (rel->r_info);
6850 if (r_symndx >= symtab_hdr->sh_info)
6851 {
6852 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6853 while (h->root.type == bfd_link_hash_indirect
6854 || h->root.type == bfd_link_hash_warning)
6855 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6856 }
6857
6858 r_type = ELF32_R_TYPE (rel->r_info);
6859 r_type = arm_real_reloc_type (globals, r_type);
6860 switch (r_type)
6861 {
6862 case R_ARM_GOT32:
6863 case R_ARM_GOT_PREL:
6864 case R_ARM_TLS_GD32:
6865 case R_ARM_TLS_IE32:
6866 if (h != NULL)
6867 {
6868 if (h->got.refcount > 0)
6869 h->got.refcount -= 1;
6870 }
6871 else if (local_got_refcounts != NULL)
6872 {
6873 if (local_got_refcounts[r_symndx] > 0)
6874 local_got_refcounts[r_symndx] -= 1;
6875 }
6876 break;
6877
6878 case R_ARM_TLS_LDM32:
6879 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
6880 break;
6881
6882 case R_ARM_ABS32:
6883 case R_ARM_ABS32_NOI:
6884 case R_ARM_REL32:
6885 case R_ARM_REL32_NOI:
6886 case R_ARM_PC24:
6887 case R_ARM_PLT32:
6888 case R_ARM_CALL:
6889 case R_ARM_JUMP24:
6890 case R_ARM_PREL31:
6891 case R_ARM_THM_CALL:
6892 case R_ARM_MOVW_ABS_NC:
6893 case R_ARM_MOVT_ABS:
6894 case R_ARM_MOVW_PREL_NC:
6895 case R_ARM_MOVT_PREL:
6896 case R_ARM_THM_MOVW_ABS_NC:
6897 case R_ARM_THM_MOVT_ABS:
6898 case R_ARM_THM_MOVW_PREL_NC:
6899 case R_ARM_THM_MOVT_PREL:
6900 /* Should the interworking branches be here also? */
6901
6902 if (h != NULL)
6903 {
6904 struct elf32_arm_link_hash_entry *eh;
6905 struct elf32_arm_relocs_copied **pp;
6906 struct elf32_arm_relocs_copied *p;
6907
6908 eh = (struct elf32_arm_link_hash_entry *) h;
6909
6910 if (h->plt.refcount > 0)
6911 {
6912 h->plt.refcount -= 1;
6913 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL)
6914 eh->plt_thumb_refcount--;
6915 }
6916
6917 if (r_type == R_ARM_ABS32
6918 || r_type == R_ARM_REL32
6919 || r_type == R_ARM_ABS32_NOI
6920 || r_type == R_ARM_REL32_NOI)
6921 {
6922 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
6923 pp = &p->next)
6924 if (p->section == sec)
6925 {
6926 p->count -= 1;
6927 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
6928 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
6929 p->pc_count -= 1;
6930 if (p->count == 0)
6931 *pp = p->next;
6932 break;
6933 }
6934 }
6935 }
6936 break;
6937
6938 default:
6939 break;
6940 }
6941 }
6942
6943 return TRUE;
6944 }
6945
6946 /* Look through the relocs for a section during the first phase. */
6947
6948 static bfd_boolean
6949 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
6950 asection *sec, const Elf_Internal_Rela *relocs)
6951 {
6952 Elf_Internal_Shdr *symtab_hdr;
6953 struct elf_link_hash_entry **sym_hashes;
6954 struct elf_link_hash_entry **sym_hashes_end;
6955 const Elf_Internal_Rela *rel;
6956 const Elf_Internal_Rela *rel_end;
6957 bfd *dynobj;
6958 asection *sreloc;
6959 bfd_vma *local_got_offsets;
6960 struct elf32_arm_link_hash_table *htab;
6961
6962 if (info->relocatable)
6963 return TRUE;
6964
6965 htab = elf32_arm_hash_table (info);
6966 sreloc = NULL;
6967
6968 /* Create dynamic sections for relocatable executables so that we can
6969 copy relocations. */
6970 if (htab->root.is_relocatable_executable
6971 && ! htab->root.dynamic_sections_created)
6972 {
6973 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
6974 return FALSE;
6975 }
6976
6977 dynobj = elf_hash_table (info)->dynobj;
6978 local_got_offsets = elf_local_got_offsets (abfd);
6979
6980 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6981 sym_hashes = elf_sym_hashes (abfd);
6982 sym_hashes_end = sym_hashes
6983 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
6984
6985 if (!elf_bad_symtab (abfd))
6986 sym_hashes_end -= symtab_hdr->sh_info;
6987
6988 rel_end = relocs + sec->reloc_count;
6989 for (rel = relocs; rel < rel_end; rel++)
6990 {
6991 struct elf_link_hash_entry *h;
6992 struct elf32_arm_link_hash_entry *eh;
6993 unsigned long r_symndx;
6994 int r_type;
6995
6996 r_symndx = ELF32_R_SYM (rel->r_info);
6997 r_type = ELF32_R_TYPE (rel->r_info);
6998 r_type = arm_real_reloc_type (htab, r_type);
6999
7000 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
7001 {
7002 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
7003 r_symndx);
7004 return FALSE;
7005 }
7006
7007 if (r_symndx < symtab_hdr->sh_info)
7008 h = NULL;
7009 else
7010 {
7011 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7012 while (h->root.type == bfd_link_hash_indirect
7013 || h->root.type == bfd_link_hash_warning)
7014 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7015 }
7016
7017 eh = (struct elf32_arm_link_hash_entry *) h;
7018
7019 switch (r_type)
7020 {
7021 case R_ARM_GOT32:
7022 case R_ARM_GOT_PREL:
7023 case R_ARM_TLS_GD32:
7024 case R_ARM_TLS_IE32:
7025 /* This symbol requires a global offset table entry. */
7026 {
7027 int tls_type, old_tls_type;
7028
7029 switch (r_type)
7030 {
7031 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
7032 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
7033 default: tls_type = GOT_NORMAL; break;
7034 }
7035
7036 if (h != NULL)
7037 {
7038 h->got.refcount++;
7039 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
7040 }
7041 else
7042 {
7043 bfd_signed_vma *local_got_refcounts;
7044
7045 /* This is a global offset table entry for a local symbol. */
7046 local_got_refcounts = elf_local_got_refcounts (abfd);
7047 if (local_got_refcounts == NULL)
7048 {
7049 bfd_size_type size;
7050
7051 size = symtab_hdr->sh_info;
7052 size *= (sizeof (bfd_signed_vma) + sizeof(char));
7053 local_got_refcounts = bfd_zalloc (abfd, size);
7054 if (local_got_refcounts == NULL)
7055 return FALSE;
7056 elf_local_got_refcounts (abfd) = local_got_refcounts;
7057 elf32_arm_local_got_tls_type (abfd)
7058 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
7059 }
7060 local_got_refcounts[r_symndx] += 1;
7061 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
7062 }
7063
7064 /* We will already have issued an error message if there is a
7065 TLS / non-TLS mismatch, based on the symbol type. We don't
7066 support any linker relaxations. So just combine any TLS
7067 types needed. */
7068 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
7069 && tls_type != GOT_NORMAL)
7070 tls_type |= old_tls_type;
7071
7072 if (old_tls_type != tls_type)
7073 {
7074 if (h != NULL)
7075 elf32_arm_hash_entry (h)->tls_type = tls_type;
7076 else
7077 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
7078 }
7079 }
7080 /* Fall through */
7081
7082 case R_ARM_TLS_LDM32:
7083 if (r_type == R_ARM_TLS_LDM32)
7084 htab->tls_ldm_got.refcount++;
7085 /* Fall through */
7086
7087 case R_ARM_GOTOFF32:
7088 case R_ARM_GOTPC:
7089 if (htab->sgot == NULL)
7090 {
7091 if (htab->root.dynobj == NULL)
7092 htab->root.dynobj = abfd;
7093 if (!create_got_section (htab->root.dynobj, info))
7094 return FALSE;
7095 }
7096 break;
7097
7098 case R_ARM_ABS12:
7099 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
7100 ldr __GOTT_INDEX__ offsets. */
7101 if (!htab->vxworks_p)
7102 break;
7103 /* Fall through */
7104
7105 case R_ARM_ABS32:
7106 case R_ARM_ABS32_NOI:
7107 case R_ARM_REL32:
7108 case R_ARM_REL32_NOI:
7109 case R_ARM_PC24:
7110 case R_ARM_PLT32:
7111 case R_ARM_CALL:
7112 case R_ARM_JUMP24:
7113 case R_ARM_PREL31:
7114 case R_ARM_THM_CALL:
7115 case R_ARM_MOVW_ABS_NC:
7116 case R_ARM_MOVT_ABS:
7117 case R_ARM_MOVW_PREL_NC:
7118 case R_ARM_MOVT_PREL:
7119 case R_ARM_THM_MOVW_ABS_NC:
7120 case R_ARM_THM_MOVT_ABS:
7121 case R_ARM_THM_MOVW_PREL_NC:
7122 case R_ARM_THM_MOVT_PREL:
7123 /* Should the interworking branches be listed here? */
7124 if (h != NULL)
7125 {
7126 /* If this reloc is in a read-only section, we might
7127 need a copy reloc. We can't check reliably at this
7128 stage whether the section is read-only, as input
7129 sections have not yet been mapped to output sections.
7130 Tentatively set the flag for now, and correct in
7131 adjust_dynamic_symbol. */
7132 if (!info->shared)
7133 h->non_got_ref = 1;
7134
7135 /* We may need a .plt entry if the function this reloc
7136 refers to is in a different object. We can't tell for
7137 sure yet, because something later might force the
7138 symbol local. */
7139 if (r_type != R_ARM_ABS32
7140 && r_type != R_ARM_REL32
7141 && r_type != R_ARM_ABS32_NOI
7142 && r_type != R_ARM_REL32_NOI)
7143 h->needs_plt = 1;
7144
7145 /* If we create a PLT entry, this relocation will reference
7146 it, even if it's an ABS32 relocation. */
7147 h->plt.refcount += 1;
7148
7149 if (r_type == R_ARM_THM_CALL)
7150 eh->plt_thumb_refcount += 1;
7151 }
7152
7153 /* If we are creating a shared library or relocatable executable,
7154 and this is a reloc against a global symbol, or a non PC
7155 relative reloc against a local symbol, then we need to copy
7156 the reloc into the shared library. However, if we are linking
7157 with -Bsymbolic, we do not need to copy a reloc against a
7158 global symbol which is defined in an object we are
7159 including in the link (i.e., DEF_REGULAR is set). At
7160 this point we have not seen all the input files, so it is
7161 possible that DEF_REGULAR is not set now but will be set
7162 later (it is never cleared). We account for that
7163 possibility below by storing information in the
7164 relocs_copied field of the hash table entry. */
7165 if ((info->shared || htab->root.is_relocatable_executable)
7166 && (sec->flags & SEC_ALLOC) != 0
7167 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
7168 || (h != NULL && ! h->needs_plt
7169 && (! info->symbolic || ! h->def_regular))))
7170 {
7171 struct elf32_arm_relocs_copied *p, **head;
7172
7173 /* When creating a shared object, we must copy these
7174 reloc types into the output file. We create a reloc
7175 section in dynobj and make room for this reloc. */
7176 if (sreloc == NULL)
7177 {
7178 const char * name;
7179
7180 name = (bfd_elf_string_from_elf_section
7181 (abfd,
7182 elf_elfheader (abfd)->e_shstrndx,
7183 elf_section_data (sec)->rel_hdr.sh_name));
7184 if (name == NULL)
7185 return FALSE;
7186
7187 BFD_ASSERT (reloc_section_p (htab, name, sec));
7188
7189 sreloc = bfd_get_section_by_name (dynobj, name);
7190 if (sreloc == NULL)
7191 {
7192 flagword flags;
7193
7194 flags = (SEC_HAS_CONTENTS | SEC_READONLY
7195 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
7196 if ((sec->flags & SEC_ALLOC) != 0
7197 /* BPABI objects never have dynamic
7198 relocations mapped. */
7199 && !htab->symbian_p)
7200 flags |= SEC_ALLOC | SEC_LOAD;
7201 sreloc = bfd_make_section_with_flags (dynobj,
7202 name,
7203 flags);
7204 if (sreloc == NULL
7205 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
7206 return FALSE;
7207 }
7208
7209 elf_section_data (sec)->sreloc = sreloc;
7210 }
7211
7212 /* If this is a global symbol, we count the number of
7213 relocations we need for this symbol. */
7214 if (h != NULL)
7215 {
7216 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
7217 }
7218 else
7219 {
7220 /* Track dynamic relocs needed for local syms too.
7221 We really need local syms available to do this
7222 easily. Oh well. */
7223
7224 asection *s;
7225 void *vpp;
7226
7227 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
7228 sec, r_symndx);
7229 if (s == NULL)
7230 return FALSE;
7231
7232 vpp = &elf_section_data (s)->local_dynrel;
7233 head = (struct elf32_arm_relocs_copied **) vpp;
7234 }
7235
7236 p = *head;
7237 if (p == NULL || p->section != sec)
7238 {
7239 bfd_size_type amt = sizeof *p;
7240
7241 p = bfd_alloc (htab->root.dynobj, amt);
7242 if (p == NULL)
7243 return FALSE;
7244 p->next = *head;
7245 *head = p;
7246 p->section = sec;
7247 p->count = 0;
7248 p->pc_count = 0;
7249 }
7250
7251 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
7252 p->pc_count += 1;
7253 p->count += 1;
7254 }
7255 break;
7256
7257 /* This relocation describes the C++ object vtable hierarchy.
7258 Reconstruct it for later use during GC. */
7259 case R_ARM_GNU_VTINHERIT:
7260 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
7261 return FALSE;
7262 break;
7263
7264 /* This relocation describes which C++ vtable entries are actually
7265 used. Record for later use during GC. */
7266 case R_ARM_GNU_VTENTRY:
7267 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
7268 return FALSE;
7269 break;
7270 }
7271 }
7272
7273 return TRUE;
7274 }
7275
7276 /* Treat mapping symbols as special target symbols. */
7277
7278 static bfd_boolean
7279 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
7280 {
7281 return bfd_is_arm_special_symbol_name (sym->name,
7282 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
7283 }
7284
7285 /* This is a copy of elf_find_function() from elf.c except that
7286 ARM mapping symbols are ignored when looking for function names
7287 and STT_ARM_TFUNC is considered to a function type. */
7288
7289 static bfd_boolean
7290 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
7291 asection * section,
7292 asymbol ** symbols,
7293 bfd_vma offset,
7294 const char ** filename_ptr,
7295 const char ** functionname_ptr)
7296 {
7297 const char * filename = NULL;
7298 asymbol * func = NULL;
7299 bfd_vma low_func = 0;
7300 asymbol ** p;
7301
7302 for (p = symbols; *p != NULL; p++)
7303 {
7304 elf_symbol_type *q;
7305
7306 q = (elf_symbol_type *) *p;
7307
7308 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7309 {
7310 default:
7311 break;
7312 case STT_FILE:
7313 filename = bfd_asymbol_name (&q->symbol);
7314 break;
7315 case STT_FUNC:
7316 case STT_ARM_TFUNC:
7317 case STT_NOTYPE:
7318 /* Skip mapping symbols. */
7319 if ((q->symbol.flags & BSF_LOCAL)
7320 && bfd_is_arm_special_symbol_name (q->symbol.name,
7321 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
7322 continue;
7323 /* Fall through. */
7324 if (bfd_get_section (&q->symbol) == section
7325 && q->symbol.value >= low_func
7326 && q->symbol.value <= offset)
7327 {
7328 func = (asymbol *) q;
7329 low_func = q->symbol.value;
7330 }
7331 break;
7332 }
7333 }
7334
7335 if (func == NULL)
7336 return FALSE;
7337
7338 if (filename_ptr)
7339 *filename_ptr = filename;
7340 if (functionname_ptr)
7341 *functionname_ptr = bfd_asymbol_name (func);
7342
7343 return TRUE;
7344 }
7345
7346
7347 /* Find the nearest line to a particular section and offset, for error
7348 reporting. This code is a duplicate of the code in elf.c, except
7349 that it uses arm_elf_find_function. */
7350
7351 static bfd_boolean
7352 elf32_arm_find_nearest_line (bfd * abfd,
7353 asection * section,
7354 asymbol ** symbols,
7355 bfd_vma offset,
7356 const char ** filename_ptr,
7357 const char ** functionname_ptr,
7358 unsigned int * line_ptr)
7359 {
7360 bfd_boolean found = FALSE;
7361
7362 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
7363
7364 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7365 filename_ptr, functionname_ptr,
7366 line_ptr, 0,
7367 & elf_tdata (abfd)->dwarf2_find_line_info))
7368 {
7369 if (!*functionname_ptr)
7370 arm_elf_find_function (abfd, section, symbols, offset,
7371 *filename_ptr ? NULL : filename_ptr,
7372 functionname_ptr);
7373
7374 return TRUE;
7375 }
7376
7377 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7378 & found, filename_ptr,
7379 functionname_ptr, line_ptr,
7380 & elf_tdata (abfd)->line_info))
7381 return FALSE;
7382
7383 if (found && (*functionname_ptr || *line_ptr))
7384 return TRUE;
7385
7386 if (symbols == NULL)
7387 return FALSE;
7388
7389 if (! arm_elf_find_function (abfd, section, symbols, offset,
7390 filename_ptr, functionname_ptr))
7391 return FALSE;
7392
7393 *line_ptr = 0;
7394 return TRUE;
7395 }
7396
7397 static bfd_boolean
7398 elf32_arm_find_inliner_info (bfd * abfd,
7399 const char ** filename_ptr,
7400 const char ** functionname_ptr,
7401 unsigned int * line_ptr)
7402 {
7403 bfd_boolean found;
7404 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7405 functionname_ptr, line_ptr,
7406 & elf_tdata (abfd)->dwarf2_find_line_info);
7407 return found;
7408 }
7409
7410 /* Adjust a symbol defined by a dynamic object and referenced by a
7411 regular object. The current definition is in some section of the
7412 dynamic object, but we're not including those sections. We have to
7413 change the definition to something the rest of the link can
7414 understand. */
7415
7416 static bfd_boolean
7417 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
7418 struct elf_link_hash_entry * h)
7419 {
7420 bfd * dynobj;
7421 asection * s;
7422 unsigned int power_of_two;
7423 struct elf32_arm_link_hash_entry * eh;
7424 struct elf32_arm_link_hash_table *globals;
7425
7426 globals = elf32_arm_hash_table (info);
7427 dynobj = elf_hash_table (info)->dynobj;
7428
7429 /* Make sure we know what is going on here. */
7430 BFD_ASSERT (dynobj != NULL
7431 && (h->needs_plt
7432 || h->u.weakdef != NULL
7433 || (h->def_dynamic
7434 && h->ref_regular
7435 && !h->def_regular)));
7436
7437 eh = (struct elf32_arm_link_hash_entry *) h;
7438
7439 /* If this is a function, put it in the procedure linkage table. We
7440 will fill in the contents of the procedure linkage table later,
7441 when we know the address of the .got section. */
7442 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
7443 || h->needs_plt)
7444 {
7445 if (h->plt.refcount <= 0
7446 || SYMBOL_CALLS_LOCAL (info, h)
7447 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7448 && h->root.type == bfd_link_hash_undefweak))
7449 {
7450 /* This case can occur if we saw a PLT32 reloc in an input
7451 file, but the symbol was never referred to by a dynamic
7452 object, or if all references were garbage collected. In
7453 such a case, we don't actually need to build a procedure
7454 linkage table, and we can just do a PC24 reloc instead. */
7455 h->plt.offset = (bfd_vma) -1;
7456 eh->plt_thumb_refcount = 0;
7457 h->needs_plt = 0;
7458 }
7459
7460 return TRUE;
7461 }
7462 else
7463 {
7464 /* It's possible that we incorrectly decided a .plt reloc was
7465 needed for an R_ARM_PC24 or similar reloc to a non-function sym
7466 in check_relocs. We can't decide accurately between function
7467 and non-function syms in check-relocs; Objects loaded later in
7468 the link may change h->type. So fix it now. */
7469 h->plt.offset = (bfd_vma) -1;
7470 eh->plt_thumb_refcount = 0;
7471 }
7472
7473 /* If this is a weak symbol, and there is a real definition, the
7474 processor independent code will have arranged for us to see the
7475 real definition first, and we can just use the same value. */
7476 if (h->u.weakdef != NULL)
7477 {
7478 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7479 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7480 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7481 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7482 return TRUE;
7483 }
7484
7485 /* If there are no non-GOT references, we do not need a copy
7486 relocation. */
7487 if (!h->non_got_ref)
7488 return TRUE;
7489
7490 /* This is a reference to a symbol defined by a dynamic object which
7491 is not a function. */
7492
7493 /* If we are creating a shared library, we must presume that the
7494 only references to the symbol are via the global offset table.
7495 For such cases we need not do anything here; the relocations will
7496 be handled correctly by relocate_section. Relocatable executables
7497 can reference data in shared objects directly, so we don't need to
7498 do anything here. */
7499 if (info->shared || globals->root.is_relocatable_executable)
7500 return TRUE;
7501
7502 if (h->size == 0)
7503 {
7504 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
7505 h->root.root.string);
7506 return TRUE;
7507 }
7508
7509 /* We must allocate the symbol in our .dynbss section, which will
7510 become part of the .bss section of the executable. There will be
7511 an entry for this symbol in the .dynsym section. The dynamic
7512 object will contain position independent code, so all references
7513 from the dynamic object to this symbol will go through the global
7514 offset table. The dynamic linker will use the .dynsym entry to
7515 determine the address it must put in the global offset table, so
7516 both the dynamic object and the regular object will refer to the
7517 same memory location for the variable. */
7518 s = bfd_get_section_by_name (dynobj, ".dynbss");
7519 BFD_ASSERT (s != NULL);
7520
7521 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
7522 copy the initial value out of the dynamic object and into the
7523 runtime process image. We need to remember the offset into the
7524 .rel(a).bss section we are going to use. */
7525 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
7526 {
7527 asection *srel;
7528
7529 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
7530 BFD_ASSERT (srel != NULL);
7531 srel->size += RELOC_SIZE (globals);
7532 h->needs_copy = 1;
7533 }
7534
7535 /* We need to figure out the alignment required for this symbol. I
7536 have no idea how ELF linkers handle this. */
7537 power_of_two = bfd_log2 (h->size);
7538 if (power_of_two > 3)
7539 power_of_two = 3;
7540
7541 /* Apply the required alignment. */
7542 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
7543 if (power_of_two > bfd_get_section_alignment (dynobj, s))
7544 {
7545 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
7546 return FALSE;
7547 }
7548
7549 /* Define the symbol as being at this point in the section. */
7550 h->root.u.def.section = s;
7551 h->root.u.def.value = s->size;
7552
7553 /* Increment the section size to make room for the symbol. */
7554 s->size += h->size;
7555
7556 return TRUE;
7557 }
7558
7559 /* Allocate space in .plt, .got and associated reloc sections for
7560 dynamic relocs. */
7561
7562 static bfd_boolean
7563 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
7564 {
7565 struct bfd_link_info *info;
7566 struct elf32_arm_link_hash_table *htab;
7567 struct elf32_arm_link_hash_entry *eh;
7568 struct elf32_arm_relocs_copied *p;
7569
7570 eh = (struct elf32_arm_link_hash_entry *) h;
7571
7572 if (h->root.type == bfd_link_hash_indirect)
7573 return TRUE;
7574
7575 if (h->root.type == bfd_link_hash_warning)
7576 /* When warning symbols are created, they **replace** the "real"
7577 entry in the hash table, thus we never get to see the real
7578 symbol in a hash traversal. So look at it now. */
7579 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7580
7581 info = (struct bfd_link_info *) inf;
7582 htab = elf32_arm_hash_table (info);
7583
7584 if (htab->root.dynamic_sections_created
7585 && h->plt.refcount > 0)
7586 {
7587 /* Make sure this symbol is output as a dynamic symbol.
7588 Undefined weak syms won't yet be marked as dynamic. */
7589 if (h->dynindx == -1
7590 && !h->forced_local)
7591 {
7592 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7593 return FALSE;
7594 }
7595
7596 if (info->shared
7597 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
7598 {
7599 asection *s = htab->splt;
7600
7601 /* If this is the first .plt entry, make room for the special
7602 first entry. */
7603 if (s->size == 0)
7604 s->size += htab->plt_header_size;
7605
7606 h->plt.offset = s->size;
7607
7608 /* If we will insert a Thumb trampoline before this PLT, leave room
7609 for it. */
7610 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
7611 {
7612 h->plt.offset += PLT_THUMB_STUB_SIZE;
7613 s->size += PLT_THUMB_STUB_SIZE;
7614 }
7615
7616 /* If this symbol is not defined in a regular file, and we are
7617 not generating a shared library, then set the symbol to this
7618 location in the .plt. This is required to make function
7619 pointers compare as equal between the normal executable and
7620 the shared library. */
7621 if (! info->shared
7622 && !h->def_regular)
7623 {
7624 h->root.u.def.section = s;
7625 h->root.u.def.value = h->plt.offset;
7626
7627 /* Make sure the function is not marked as Thumb, in case
7628 it is the target of an ABS32 relocation, which will
7629 point to the PLT entry. */
7630 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
7631 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
7632 }
7633
7634 /* Make room for this entry. */
7635 s->size += htab->plt_entry_size;
7636
7637 if (!htab->symbian_p)
7638 {
7639 /* We also need to make an entry in the .got.plt section, which
7640 will be placed in the .got section by the linker script. */
7641 eh->plt_got_offset = htab->sgotplt->size;
7642 htab->sgotplt->size += 4;
7643 }
7644
7645 /* We also need to make an entry in the .rel(a).plt section. */
7646 htab->srelplt->size += RELOC_SIZE (htab);
7647
7648 /* VxWorks executables have a second set of relocations for
7649 each PLT entry. They go in a separate relocation section,
7650 which is processed by the kernel loader. */
7651 if (htab->vxworks_p && !info->shared)
7652 {
7653 /* There is a relocation for the initial PLT entry:
7654 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
7655 if (h->plt.offset == htab->plt_header_size)
7656 htab->srelplt2->size += RELOC_SIZE (htab);
7657
7658 /* There are two extra relocations for each subsequent
7659 PLT entry: an R_ARM_32 relocation for the GOT entry,
7660 and an R_ARM_32 relocation for the PLT entry. */
7661 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
7662 }
7663 }
7664 else
7665 {
7666 h->plt.offset = (bfd_vma) -1;
7667 h->needs_plt = 0;
7668 }
7669 }
7670 else
7671 {
7672 h->plt.offset = (bfd_vma) -1;
7673 h->needs_plt = 0;
7674 }
7675
7676 if (h->got.refcount > 0)
7677 {
7678 asection *s;
7679 bfd_boolean dyn;
7680 int tls_type = elf32_arm_hash_entry (h)->tls_type;
7681 int indx;
7682
7683 /* Make sure this symbol is output as a dynamic symbol.
7684 Undefined weak syms won't yet be marked as dynamic. */
7685 if (h->dynindx == -1
7686 && !h->forced_local)
7687 {
7688 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7689 return FALSE;
7690 }
7691
7692 if (!htab->symbian_p)
7693 {
7694 s = htab->sgot;
7695 h->got.offset = s->size;
7696
7697 if (tls_type == GOT_UNKNOWN)
7698 abort ();
7699
7700 if (tls_type == GOT_NORMAL)
7701 /* Non-TLS symbols need one GOT slot. */
7702 s->size += 4;
7703 else
7704 {
7705 if (tls_type & GOT_TLS_GD)
7706 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
7707 s->size += 8;
7708 if (tls_type & GOT_TLS_IE)
7709 /* R_ARM_TLS_IE32 needs one GOT slot. */
7710 s->size += 4;
7711 }
7712
7713 dyn = htab->root.dynamic_sections_created;
7714
7715 indx = 0;
7716 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7717 && (!info->shared
7718 || !SYMBOL_REFERENCES_LOCAL (info, h)))
7719 indx = h->dynindx;
7720
7721 if (tls_type != GOT_NORMAL
7722 && (info->shared || indx != 0)
7723 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7724 || h->root.type != bfd_link_hash_undefweak))
7725 {
7726 if (tls_type & GOT_TLS_IE)
7727 htab->srelgot->size += RELOC_SIZE (htab);
7728
7729 if (tls_type & GOT_TLS_GD)
7730 htab->srelgot->size += RELOC_SIZE (htab);
7731
7732 if ((tls_type & GOT_TLS_GD) && indx != 0)
7733 htab->srelgot->size += RELOC_SIZE (htab);
7734 }
7735 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7736 || h->root.type != bfd_link_hash_undefweak)
7737 && (info->shared
7738 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
7739 htab->srelgot->size += RELOC_SIZE (htab);
7740 }
7741 }
7742 else
7743 h->got.offset = (bfd_vma) -1;
7744
7745 /* Allocate stubs for exported Thumb functions on v4t. */
7746 if (!htab->use_blx && h->dynindx != -1
7747 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
7748 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
7749 {
7750 struct elf_link_hash_entry * th;
7751 struct bfd_link_hash_entry * bh;
7752 struct elf_link_hash_entry * myh;
7753 char name[1024];
7754 asection *s;
7755 bh = NULL;
7756 /* Create a new symbol to regist the real location of the function. */
7757 s = h->root.u.def.section;
7758 sprintf(name, "__real_%s", h->root.root.string);
7759 _bfd_generic_link_add_one_symbol (info, s->owner,
7760 name, BSF_GLOBAL, s,
7761 h->root.u.def.value,
7762 NULL, TRUE, FALSE, &bh);
7763
7764 myh = (struct elf_link_hash_entry *) bh;
7765 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
7766 myh->forced_local = 1;
7767 eh->export_glue = myh;
7768 th = record_arm_to_thumb_glue (info, h);
7769 /* Point the symbol at the stub. */
7770 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
7771 h->root.u.def.section = th->root.u.def.section;
7772 h->root.u.def.value = th->root.u.def.value & ~1;
7773 }
7774
7775 if (eh->relocs_copied == NULL)
7776 return TRUE;
7777
7778 /* In the shared -Bsymbolic case, discard space allocated for
7779 dynamic pc-relative relocs against symbols which turn out to be
7780 defined in regular objects. For the normal shared case, discard
7781 space for pc-relative relocs that have become local due to symbol
7782 visibility changes. */
7783
7784 if (info->shared || htab->root.is_relocatable_executable)
7785 {
7786 /* The only reloc thats uses pc_count are R_ARM_REL32 and
7787 R_ARM_REL32_NOI, which will appear on something like
7788 ".long foo - .". We want calls to protected symbols to resolve
7789 directly to the function rather than going via the plt. If people
7790 want function pointer comparisons to work as expected then they
7791 should avoid writing assembly like ".long foo - .". */
7792 if (SYMBOL_CALLS_LOCAL (info, h))
7793 {
7794 struct elf32_arm_relocs_copied **pp;
7795
7796 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
7797 {
7798 p->count -= p->pc_count;
7799 p->pc_count = 0;
7800 if (p->count == 0)
7801 *pp = p->next;
7802 else
7803 pp = &p->next;
7804 }
7805 }
7806
7807 /* Also discard relocs on undefined weak syms with non-default
7808 visibility. */
7809 if (eh->relocs_copied != NULL
7810 && h->root.type == bfd_link_hash_undefweak)
7811 {
7812 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7813 eh->relocs_copied = NULL;
7814
7815 /* Make sure undefined weak symbols are output as a dynamic
7816 symbol in PIEs. */
7817 else if (h->dynindx == -1
7818 && !h->forced_local)
7819 {
7820 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7821 return FALSE;
7822 }
7823 }
7824
7825 else if (htab->root.is_relocatable_executable && h->dynindx == -1
7826 && h->root.type == bfd_link_hash_new)
7827 {
7828 /* Output absolute symbols so that we can create relocations
7829 against them. For normal symbols we output a relocation
7830 against the section that contains them. */
7831 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7832 return FALSE;
7833 }
7834
7835 }
7836 else
7837 {
7838 /* For the non-shared case, discard space for relocs against
7839 symbols which turn out to need copy relocs or are not
7840 dynamic. */
7841
7842 if (!h->non_got_ref
7843 && ((h->def_dynamic
7844 && !h->def_regular)
7845 || (htab->root.dynamic_sections_created
7846 && (h->root.type == bfd_link_hash_undefweak
7847 || h->root.type == bfd_link_hash_undefined))))
7848 {
7849 /* Make sure this symbol is output as a dynamic symbol.
7850 Undefined weak syms won't yet be marked as dynamic. */
7851 if (h->dynindx == -1
7852 && !h->forced_local)
7853 {
7854 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7855 return FALSE;
7856 }
7857
7858 /* If that succeeded, we know we'll be keeping all the
7859 relocs. */
7860 if (h->dynindx != -1)
7861 goto keep;
7862 }
7863
7864 eh->relocs_copied = NULL;
7865
7866 keep: ;
7867 }
7868
7869 /* Finally, allocate space. */
7870 for (p = eh->relocs_copied; p != NULL; p = p->next)
7871 {
7872 asection *sreloc = elf_section_data (p->section)->sreloc;
7873 sreloc->size += p->count * RELOC_SIZE (htab);
7874 }
7875
7876 return TRUE;
7877 }
7878
7879 /* Find any dynamic relocs that apply to read-only sections. */
7880
7881 static bfd_boolean
7882 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
7883 {
7884 struct elf32_arm_link_hash_entry *eh;
7885 struct elf32_arm_relocs_copied *p;
7886
7887 if (h->root.type == bfd_link_hash_warning)
7888 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7889
7890 eh = (struct elf32_arm_link_hash_entry *) h;
7891 for (p = eh->relocs_copied; p != NULL; p = p->next)
7892 {
7893 asection *s = p->section;
7894
7895 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7896 {
7897 struct bfd_link_info *info = (struct bfd_link_info *) inf;
7898
7899 info->flags |= DF_TEXTREL;
7900
7901 /* Not an error, just cut short the traversal. */
7902 return FALSE;
7903 }
7904 }
7905 return TRUE;
7906 }
7907
7908 void
7909 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
7910 int byteswap_code)
7911 {
7912 struct elf32_arm_link_hash_table *globals;
7913
7914 globals = elf32_arm_hash_table (info);
7915 globals->byteswap_code = byteswap_code;
7916 }
7917
7918 /* Set the sizes of the dynamic sections. */
7919
7920 static bfd_boolean
7921 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
7922 struct bfd_link_info * info)
7923 {
7924 bfd * dynobj;
7925 asection * s;
7926 bfd_boolean plt;
7927 bfd_boolean relocs;
7928 bfd *ibfd;
7929 struct elf32_arm_link_hash_table *htab;
7930
7931 htab = elf32_arm_hash_table (info);
7932 dynobj = elf_hash_table (info)->dynobj;
7933 BFD_ASSERT (dynobj != NULL);
7934 check_use_blx (htab);
7935
7936 if (elf_hash_table (info)->dynamic_sections_created)
7937 {
7938 /* Set the contents of the .interp section to the interpreter. */
7939 if (info->executable)
7940 {
7941 s = bfd_get_section_by_name (dynobj, ".interp");
7942 BFD_ASSERT (s != NULL);
7943 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7944 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7945 }
7946 }
7947
7948 /* Set up .got offsets for local syms, and space for local dynamic
7949 relocs. */
7950 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7951 {
7952 bfd_signed_vma *local_got;
7953 bfd_signed_vma *end_local_got;
7954 char *local_tls_type;
7955 bfd_size_type locsymcount;
7956 Elf_Internal_Shdr *symtab_hdr;
7957 asection *srel;
7958
7959 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
7960 continue;
7961
7962 for (s = ibfd->sections; s != NULL; s = s->next)
7963 {
7964 struct elf32_arm_relocs_copied *p;
7965
7966 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7967 {
7968 if (!bfd_is_abs_section (p->section)
7969 && bfd_is_abs_section (p->section->output_section))
7970 {
7971 /* Input section has been discarded, either because
7972 it is a copy of a linkonce section or due to
7973 linker script /DISCARD/, so we'll be discarding
7974 the relocs too. */
7975 }
7976 else if (p->count != 0)
7977 {
7978 srel = elf_section_data (p->section)->sreloc;
7979 srel->size += p->count * RELOC_SIZE (htab);
7980 if ((p->section->output_section->flags & SEC_READONLY) != 0)
7981 info->flags |= DF_TEXTREL;
7982 }
7983 }
7984 }
7985
7986 local_got = elf_local_got_refcounts (ibfd);
7987 if (!local_got)
7988 continue;
7989
7990 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7991 locsymcount = symtab_hdr->sh_info;
7992 end_local_got = local_got + locsymcount;
7993 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
7994 s = htab->sgot;
7995 srel = htab->srelgot;
7996 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
7997 {
7998 if (*local_got > 0)
7999 {
8000 *local_got = s->size;
8001 if (*local_tls_type & GOT_TLS_GD)
8002 /* TLS_GD relocs need an 8-byte structure in the GOT. */
8003 s->size += 8;
8004 if (*local_tls_type & GOT_TLS_IE)
8005 s->size += 4;
8006 if (*local_tls_type == GOT_NORMAL)
8007 s->size += 4;
8008
8009 if (info->shared || *local_tls_type == GOT_TLS_GD)
8010 srel->size += RELOC_SIZE (htab);
8011 }
8012 else
8013 *local_got = (bfd_vma) -1;
8014 }
8015 }
8016
8017 if (htab->tls_ldm_got.refcount > 0)
8018 {
8019 /* Allocate two GOT entries and one dynamic relocation (if necessary)
8020 for R_ARM_TLS_LDM32 relocations. */
8021 htab->tls_ldm_got.offset = htab->sgot->size;
8022 htab->sgot->size += 8;
8023 if (info->shared)
8024 htab->srelgot->size += RELOC_SIZE (htab);
8025 }
8026 else
8027 htab->tls_ldm_got.offset = -1;
8028
8029 /* Allocate global sym .plt and .got entries, and space for global
8030 sym dynamic relocs. */
8031 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
8032
8033 /* Here we rummage through the found bfds to collect glue information. */
8034 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8035 if (!bfd_elf32_arm_process_before_allocation (ibfd, info))
8036 /* xgettext:c-format */
8037 _bfd_error_handler (_("Errors encountered processing file %s"),
8038 ibfd->filename);
8039
8040 /* The check_relocs and adjust_dynamic_symbol entry points have
8041 determined the sizes of the various dynamic sections. Allocate
8042 memory for them. */
8043 plt = FALSE;
8044 relocs = FALSE;
8045 for (s = dynobj->sections; s != NULL; s = s->next)
8046 {
8047 const char * name;
8048
8049 if ((s->flags & SEC_LINKER_CREATED) == 0)
8050 continue;
8051
8052 /* It's OK to base decisions on the section name, because none
8053 of the dynobj section names depend upon the input files. */
8054 name = bfd_get_section_name (dynobj, s);
8055
8056 if (strcmp (name, ".plt") == 0)
8057 {
8058 /* Remember whether there is a PLT. */
8059 plt = s->size != 0;
8060 }
8061 else if (CONST_STRNEQ (name, ".rel"))
8062 {
8063 if (s->size != 0)
8064 {
8065 /* Remember whether there are any reloc sections other
8066 than .rel(a).plt and .rela.plt.unloaded. */
8067 if (s != htab->srelplt && s != htab->srelplt2)
8068 relocs = TRUE;
8069
8070 /* We use the reloc_count field as a counter if we need
8071 to copy relocs into the output file. */
8072 s->reloc_count = 0;
8073 }
8074 }
8075 else if (! CONST_STRNEQ (name, ".got")
8076 && strcmp (name, ".dynbss") != 0)
8077 {
8078 /* It's not one of our sections, so don't allocate space. */
8079 continue;
8080 }
8081
8082 if (s->size == 0)
8083 {
8084 /* If we don't need this section, strip it from the
8085 output file. This is mostly to handle .rel(a).bss and
8086 .rel(a).plt. We must create both sections in
8087 create_dynamic_sections, because they must be created
8088 before the linker maps input sections to output
8089 sections. The linker does that before
8090 adjust_dynamic_symbol is called, and it is that
8091 function which decides whether anything needs to go
8092 into these sections. */
8093 s->flags |= SEC_EXCLUDE;
8094 continue;
8095 }
8096
8097 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8098 continue;
8099
8100 /* Allocate memory for the section contents. */
8101 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
8102 if (s->contents == NULL)
8103 return FALSE;
8104 }
8105
8106 if (elf_hash_table (info)->dynamic_sections_created)
8107 {
8108 /* Add some entries to the .dynamic section. We fill in the
8109 values later, in elf32_arm_finish_dynamic_sections, but we
8110 must add the entries now so that we get the correct size for
8111 the .dynamic section. The DT_DEBUG entry is filled in by the
8112 dynamic linker and used by the debugger. */
8113 #define add_dynamic_entry(TAG, VAL) \
8114 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8115
8116 if (info->executable)
8117 {
8118 if (!add_dynamic_entry (DT_DEBUG, 0))
8119 return FALSE;
8120 }
8121
8122 if (plt)
8123 {
8124 if ( !add_dynamic_entry (DT_PLTGOT, 0)
8125 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8126 || !add_dynamic_entry (DT_PLTREL,
8127 htab->use_rel ? DT_REL : DT_RELA)
8128 || !add_dynamic_entry (DT_JMPREL, 0))
8129 return FALSE;
8130 }
8131
8132 if (relocs)
8133 {
8134 if (htab->use_rel)
8135 {
8136 if (!add_dynamic_entry (DT_REL, 0)
8137 || !add_dynamic_entry (DT_RELSZ, 0)
8138 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
8139 return FALSE;
8140 }
8141 else
8142 {
8143 if (!add_dynamic_entry (DT_RELA, 0)
8144 || !add_dynamic_entry (DT_RELASZ, 0)
8145 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
8146 return FALSE;
8147 }
8148 }
8149
8150 /* If any dynamic relocs apply to a read-only section,
8151 then we need a DT_TEXTREL entry. */
8152 if ((info->flags & DF_TEXTREL) == 0)
8153 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
8154 (PTR) info);
8155
8156 if ((info->flags & DF_TEXTREL) != 0)
8157 {
8158 if (!add_dynamic_entry (DT_TEXTREL, 0))
8159 return FALSE;
8160 }
8161 }
8162 #undef add_dynamic_entry
8163
8164 return TRUE;
8165 }
8166
8167 /* Finish up dynamic symbol handling. We set the contents of various
8168 dynamic sections here. */
8169
8170 static bfd_boolean
8171 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
8172 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
8173 {
8174 bfd * dynobj;
8175 struct elf32_arm_link_hash_table *htab;
8176 struct elf32_arm_link_hash_entry *eh;
8177
8178 dynobj = elf_hash_table (info)->dynobj;
8179 htab = elf32_arm_hash_table (info);
8180 eh = (struct elf32_arm_link_hash_entry *) h;
8181
8182 if (h->plt.offset != (bfd_vma) -1)
8183 {
8184 asection * splt;
8185 asection * srel;
8186 bfd_byte *loc;
8187 bfd_vma plt_index;
8188 Elf_Internal_Rela rel;
8189
8190 /* This symbol has an entry in the procedure linkage table. Set
8191 it up. */
8192
8193 BFD_ASSERT (h->dynindx != -1);
8194
8195 splt = bfd_get_section_by_name (dynobj, ".plt");
8196 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
8197 BFD_ASSERT (splt != NULL && srel != NULL);
8198
8199 /* Fill in the entry in the procedure linkage table. */
8200 if (htab->symbian_p)
8201 {
8202 put_arm_insn (htab, output_bfd,
8203 elf32_arm_symbian_plt_entry[0],
8204 splt->contents + h->plt.offset);
8205 bfd_put_32 (output_bfd,
8206 elf32_arm_symbian_plt_entry[1],
8207 splt->contents + h->plt.offset + 4);
8208
8209 /* Fill in the entry in the .rel.plt section. */
8210 rel.r_offset = (splt->output_section->vma
8211 + splt->output_offset
8212 + h->plt.offset + 4);
8213 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8214
8215 /* Get the index in the procedure linkage table which
8216 corresponds to this symbol. This is the index of this symbol
8217 in all the symbols for which we are making plt entries. The
8218 first entry in the procedure linkage table is reserved. */
8219 plt_index = ((h->plt.offset - htab->plt_header_size)
8220 / htab->plt_entry_size);
8221 }
8222 else
8223 {
8224 bfd_vma got_offset, got_address, plt_address;
8225 bfd_vma got_displacement;
8226 asection * sgot;
8227 bfd_byte * ptr;
8228
8229 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
8230 BFD_ASSERT (sgot != NULL);
8231
8232 /* Get the offset into the .got.plt table of the entry that
8233 corresponds to this function. */
8234 got_offset = eh->plt_got_offset;
8235
8236 /* Get the index in the procedure linkage table which
8237 corresponds to this symbol. This is the index of this symbol
8238 in all the symbols for which we are making plt entries. The
8239 first three entries in .got.plt are reserved; after that
8240 symbols appear in the same order as in .plt. */
8241 plt_index = (got_offset - 12) / 4;
8242
8243 /* Calculate the address of the GOT entry. */
8244 got_address = (sgot->output_section->vma
8245 + sgot->output_offset
8246 + got_offset);
8247
8248 /* ...and the address of the PLT entry. */
8249 plt_address = (splt->output_section->vma
8250 + splt->output_offset
8251 + h->plt.offset);
8252
8253 ptr = htab->splt->contents + h->plt.offset;
8254 if (htab->vxworks_p && info->shared)
8255 {
8256 unsigned int i;
8257 bfd_vma val;
8258
8259 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8260 {
8261 val = elf32_arm_vxworks_shared_plt_entry[i];
8262 if (i == 2)
8263 val |= got_address - sgot->output_section->vma;
8264 if (i == 5)
8265 val |= plt_index * RELOC_SIZE (htab);
8266 if (i == 2 || i == 5)
8267 bfd_put_32 (output_bfd, val, ptr);
8268 else
8269 put_arm_insn (htab, output_bfd, val, ptr);
8270 }
8271 }
8272 else if (htab->vxworks_p)
8273 {
8274 unsigned int i;
8275 bfd_vma val;
8276
8277 for (i = 0; i != htab->plt_entry_size / 4; i++)
8278 {
8279 val = elf32_arm_vxworks_exec_plt_entry[i];
8280 if (i == 2)
8281 val |= got_address;
8282 if (i == 4)
8283 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
8284 if (i == 5)
8285 val |= plt_index * RELOC_SIZE (htab);
8286 if (i == 2 || i == 5)
8287 bfd_put_32 (output_bfd, val, ptr);
8288 else
8289 put_arm_insn (htab, output_bfd, val, ptr);
8290 }
8291
8292 loc = (htab->srelplt2->contents
8293 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
8294
8295 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
8296 referencing the GOT for this PLT entry. */
8297 rel.r_offset = plt_address + 8;
8298 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
8299 rel.r_addend = got_offset;
8300 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8301 loc += RELOC_SIZE (htab);
8302
8303 /* Create the R_ARM_ABS32 relocation referencing the
8304 beginning of the PLT for this GOT entry. */
8305 rel.r_offset = got_address;
8306 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
8307 rel.r_addend = 0;
8308 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8309 }
8310 else
8311 {
8312 /* Calculate the displacement between the PLT slot and the
8313 entry in the GOT. The eight-byte offset accounts for the
8314 value produced by adding to pc in the first instruction
8315 of the PLT stub. */
8316 got_displacement = got_address - (plt_address + 8);
8317
8318 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
8319
8320 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
8321 {
8322 put_thumb_insn (htab, output_bfd,
8323 elf32_arm_plt_thumb_stub[0], ptr - 4);
8324 put_thumb_insn (htab, output_bfd,
8325 elf32_arm_plt_thumb_stub[1], ptr - 2);
8326 }
8327
8328 put_arm_insn (htab, output_bfd,
8329 elf32_arm_plt_entry[0]
8330 | ((got_displacement & 0x0ff00000) >> 20),
8331 ptr + 0);
8332 put_arm_insn (htab, output_bfd,
8333 elf32_arm_plt_entry[1]
8334 | ((got_displacement & 0x000ff000) >> 12),
8335 ptr+ 4);
8336 put_arm_insn (htab, output_bfd,
8337 elf32_arm_plt_entry[2]
8338 | (got_displacement & 0x00000fff),
8339 ptr + 8);
8340 #ifdef FOUR_WORD_PLT
8341 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
8342 #endif
8343 }
8344
8345 /* Fill in the entry in the global offset table. */
8346 bfd_put_32 (output_bfd,
8347 (splt->output_section->vma
8348 + splt->output_offset),
8349 sgot->contents + got_offset);
8350
8351 /* Fill in the entry in the .rel(a).plt section. */
8352 rel.r_addend = 0;
8353 rel.r_offset = got_address;
8354 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
8355 }
8356
8357 loc = srel->contents + plt_index * RELOC_SIZE (htab);
8358 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8359
8360 if (!h->def_regular)
8361 {
8362 /* Mark the symbol as undefined, rather than as defined in
8363 the .plt section. Leave the value alone. */
8364 sym->st_shndx = SHN_UNDEF;
8365 /* If the symbol is weak, we do need to clear the value.
8366 Otherwise, the PLT entry would provide a definition for
8367 the symbol even if the symbol wasn't defined anywhere,
8368 and so the symbol would never be NULL. */
8369 if (!h->ref_regular_nonweak)
8370 sym->st_value = 0;
8371 }
8372 }
8373
8374 if (h->got.offset != (bfd_vma) -1
8375 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
8376 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
8377 {
8378 asection * sgot;
8379 asection * srel;
8380 Elf_Internal_Rela rel;
8381 bfd_byte *loc;
8382 bfd_vma offset;
8383
8384 /* This symbol has an entry in the global offset table. Set it
8385 up. */
8386 sgot = bfd_get_section_by_name (dynobj, ".got");
8387 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
8388 BFD_ASSERT (sgot != NULL && srel != NULL);
8389
8390 offset = (h->got.offset & ~(bfd_vma) 1);
8391 rel.r_addend = 0;
8392 rel.r_offset = (sgot->output_section->vma
8393 + sgot->output_offset
8394 + offset);
8395
8396 /* If this is a static link, or it is a -Bsymbolic link and the
8397 symbol is defined locally or was forced to be local because
8398 of a version file, we just want to emit a RELATIVE reloc.
8399 The entry in the global offset table will already have been
8400 initialized in the relocate_section function. */
8401 if (info->shared
8402 && SYMBOL_REFERENCES_LOCAL (info, h))
8403 {
8404 BFD_ASSERT((h->got.offset & 1) != 0);
8405 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
8406 if (!htab->use_rel)
8407 {
8408 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
8409 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
8410 }
8411 }
8412 else
8413 {
8414 BFD_ASSERT((h->got.offset & 1) == 0);
8415 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
8416 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8417 }
8418
8419 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
8420 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8421 }
8422
8423 if (h->needs_copy)
8424 {
8425 asection * s;
8426 Elf_Internal_Rela rel;
8427 bfd_byte *loc;
8428
8429 /* This symbol needs a copy reloc. Set it up. */
8430 BFD_ASSERT (h->dynindx != -1
8431 && (h->root.type == bfd_link_hash_defined
8432 || h->root.type == bfd_link_hash_defweak));
8433
8434 s = bfd_get_section_by_name (h->root.u.def.section->owner,
8435 RELOC_SECTION (htab, ".bss"));
8436 BFD_ASSERT (s != NULL);
8437
8438 rel.r_addend = 0;
8439 rel.r_offset = (h->root.u.def.value
8440 + h->root.u.def.section->output_section->vma
8441 + h->root.u.def.section->output_offset);
8442 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
8443 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
8444 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8445 }
8446
8447 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
8448 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
8449 to the ".got" section. */
8450 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8451 || (!htab->vxworks_p && h == htab->root.hgot))
8452 sym->st_shndx = SHN_ABS;
8453
8454 return TRUE;
8455 }
8456
8457 /* Finish up the dynamic sections. */
8458
8459 static bfd_boolean
8460 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
8461 {
8462 bfd * dynobj;
8463 asection * sgot;
8464 asection * sdyn;
8465
8466 dynobj = elf_hash_table (info)->dynobj;
8467
8468 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
8469 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
8470 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8471
8472 if (elf_hash_table (info)->dynamic_sections_created)
8473 {
8474 asection *splt;
8475 Elf32_External_Dyn *dyncon, *dynconend;
8476 struct elf32_arm_link_hash_table *htab;
8477
8478 htab = elf32_arm_hash_table (info);
8479 splt = bfd_get_section_by_name (dynobj, ".plt");
8480 BFD_ASSERT (splt != NULL && sdyn != NULL);
8481
8482 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8483 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8484
8485 for (; dyncon < dynconend; dyncon++)
8486 {
8487 Elf_Internal_Dyn dyn;
8488 const char * name;
8489 asection * s;
8490
8491 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8492
8493 switch (dyn.d_tag)
8494 {
8495 unsigned int type;
8496
8497 default:
8498 break;
8499
8500 case DT_HASH:
8501 name = ".hash";
8502 goto get_vma_if_bpabi;
8503 case DT_STRTAB:
8504 name = ".dynstr";
8505 goto get_vma_if_bpabi;
8506 case DT_SYMTAB:
8507 name = ".dynsym";
8508 goto get_vma_if_bpabi;
8509 case DT_VERSYM:
8510 name = ".gnu.version";
8511 goto get_vma_if_bpabi;
8512 case DT_VERDEF:
8513 name = ".gnu.version_d";
8514 goto get_vma_if_bpabi;
8515 case DT_VERNEED:
8516 name = ".gnu.version_r";
8517 goto get_vma_if_bpabi;
8518
8519 case DT_PLTGOT:
8520 name = ".got";
8521 goto get_vma;
8522 case DT_JMPREL:
8523 name = RELOC_SECTION (htab, ".plt");
8524 get_vma:
8525 s = bfd_get_section_by_name (output_bfd, name);
8526 BFD_ASSERT (s != NULL);
8527 if (!htab->symbian_p)
8528 dyn.d_un.d_ptr = s->vma;
8529 else
8530 /* In the BPABI, tags in the PT_DYNAMIC section point
8531 at the file offset, not the memory address, for the
8532 convenience of the post linker. */
8533 dyn.d_un.d_ptr = s->filepos;
8534 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8535 break;
8536
8537 get_vma_if_bpabi:
8538 if (htab->symbian_p)
8539 goto get_vma;
8540 break;
8541
8542 case DT_PLTRELSZ:
8543 s = bfd_get_section_by_name (output_bfd,
8544 RELOC_SECTION (htab, ".plt"));
8545 BFD_ASSERT (s != NULL);
8546 dyn.d_un.d_val = s->size;
8547 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8548 break;
8549
8550 case DT_RELSZ:
8551 case DT_RELASZ:
8552 if (!htab->symbian_p)
8553 {
8554 /* My reading of the SVR4 ABI indicates that the
8555 procedure linkage table relocs (DT_JMPREL) should be
8556 included in the overall relocs (DT_REL). This is
8557 what Solaris does. However, UnixWare can not handle
8558 that case. Therefore, we override the DT_RELSZ entry
8559 here to make it not include the JMPREL relocs. Since
8560 the linker script arranges for .rel(a).plt to follow all
8561 other relocation sections, we don't have to worry
8562 about changing the DT_REL entry. */
8563 s = bfd_get_section_by_name (output_bfd,
8564 RELOC_SECTION (htab, ".plt"));
8565 if (s != NULL)
8566 dyn.d_un.d_val -= s->size;
8567 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8568 break;
8569 }
8570 /* Fall through */
8571
8572 case DT_REL:
8573 case DT_RELA:
8574 /* In the BPABI, the DT_REL tag must point at the file
8575 offset, not the VMA, of the first relocation
8576 section. So, we use code similar to that in
8577 elflink.c, but do not check for SHF_ALLOC on the
8578 relcoation section, since relocations sections are
8579 never allocated under the BPABI. The comments above
8580 about Unixware notwithstanding, we include all of the
8581 relocations here. */
8582 if (htab->symbian_p)
8583 {
8584 unsigned int i;
8585 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
8586 ? SHT_REL : SHT_RELA);
8587 dyn.d_un.d_val = 0;
8588 for (i = 1; i < elf_numsections (output_bfd); i++)
8589 {
8590 Elf_Internal_Shdr *hdr
8591 = elf_elfsections (output_bfd)[i];
8592 if (hdr->sh_type == type)
8593 {
8594 if (dyn.d_tag == DT_RELSZ
8595 || dyn.d_tag == DT_RELASZ)
8596 dyn.d_un.d_val += hdr->sh_size;
8597 else if ((ufile_ptr) hdr->sh_offset
8598 <= dyn.d_un.d_val - 1)
8599 dyn.d_un.d_val = hdr->sh_offset;
8600 }
8601 }
8602 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8603 }
8604 break;
8605
8606 /* Set the bottom bit of DT_INIT/FINI if the
8607 corresponding function is Thumb. */
8608 case DT_INIT:
8609 name = info->init_function;
8610 goto get_sym;
8611 case DT_FINI:
8612 name = info->fini_function;
8613 get_sym:
8614 /* If it wasn't set by elf_bfd_final_link
8615 then there is nothing to adjust. */
8616 if (dyn.d_un.d_val != 0)
8617 {
8618 struct elf_link_hash_entry * eh;
8619
8620 eh = elf_link_hash_lookup (elf_hash_table (info), name,
8621 FALSE, FALSE, TRUE);
8622 if (eh != (struct elf_link_hash_entry *) NULL
8623 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
8624 {
8625 dyn.d_un.d_val |= 1;
8626 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8627 }
8628 }
8629 break;
8630 }
8631 }
8632
8633 /* Fill in the first entry in the procedure linkage table. */
8634 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
8635 {
8636 const bfd_vma *plt0_entry;
8637 bfd_vma got_address, plt_address, got_displacement;
8638
8639 /* Calculate the addresses of the GOT and PLT. */
8640 got_address = sgot->output_section->vma + sgot->output_offset;
8641 plt_address = splt->output_section->vma + splt->output_offset;
8642
8643 if (htab->vxworks_p)
8644 {
8645 /* The VxWorks GOT is relocated by the dynamic linker.
8646 Therefore, we must emit relocations rather than simply
8647 computing the values now. */
8648 Elf_Internal_Rela rel;
8649
8650 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
8651 put_arm_insn (htab, output_bfd, plt0_entry[0],
8652 splt->contents + 0);
8653 put_arm_insn (htab, output_bfd, plt0_entry[1],
8654 splt->contents + 4);
8655 put_arm_insn (htab, output_bfd, plt0_entry[2],
8656 splt->contents + 8);
8657 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
8658
8659 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
8660 rel.r_offset = plt_address + 12;
8661 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
8662 rel.r_addend = 0;
8663 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
8664 htab->srelplt2->contents);
8665 }
8666 else
8667 {
8668 got_displacement = got_address - (plt_address + 16);
8669
8670 plt0_entry = elf32_arm_plt0_entry;
8671 put_arm_insn (htab, output_bfd, plt0_entry[0],
8672 splt->contents + 0);
8673 put_arm_insn (htab, output_bfd, plt0_entry[1],
8674 splt->contents + 4);
8675 put_arm_insn (htab, output_bfd, plt0_entry[2],
8676 splt->contents + 8);
8677 put_arm_insn (htab, output_bfd, plt0_entry[3],
8678 splt->contents + 12);
8679
8680 #ifdef FOUR_WORD_PLT
8681 /* The displacement value goes in the otherwise-unused
8682 last word of the second entry. */
8683 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
8684 #else
8685 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
8686 #endif
8687 }
8688 }
8689
8690 /* UnixWare sets the entsize of .plt to 4, although that doesn't
8691 really seem like the right value. */
8692 if (splt->output_section->owner == output_bfd)
8693 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
8694
8695 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
8696 {
8697 /* Correct the .rel(a).plt.unloaded relocations. They will have
8698 incorrect symbol indexes. */
8699 int num_plts;
8700 unsigned char *p;
8701
8702 num_plts = ((htab->splt->size - htab->plt_header_size)
8703 / htab->plt_entry_size);
8704 p = htab->srelplt2->contents + RELOC_SIZE (htab);
8705
8706 for (; num_plts; num_plts--)
8707 {
8708 Elf_Internal_Rela rel;
8709
8710 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
8711 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
8712 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
8713 p += RELOC_SIZE (htab);
8714
8715 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
8716 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
8717 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
8718 p += RELOC_SIZE (htab);
8719 }
8720 }
8721 }
8722
8723 /* Fill in the first three entries in the global offset table. */
8724 if (sgot)
8725 {
8726 if (sgot->size > 0)
8727 {
8728 if (sdyn == NULL)
8729 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
8730 else
8731 bfd_put_32 (output_bfd,
8732 sdyn->output_section->vma + sdyn->output_offset,
8733 sgot->contents);
8734 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
8735 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
8736 }
8737
8738 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
8739 }
8740
8741 return TRUE;
8742 }
8743
8744 static void
8745 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
8746 {
8747 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
8748 struct elf32_arm_link_hash_table *globals;
8749
8750 i_ehdrp = elf_elfheader (abfd);
8751
8752 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
8753 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
8754 else
8755 i_ehdrp->e_ident[EI_OSABI] = 0;
8756 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
8757
8758 if (link_info)
8759 {
8760 globals = elf32_arm_hash_table (link_info);
8761 if (globals->byteswap_code)
8762 i_ehdrp->e_flags |= EF_ARM_BE8;
8763 }
8764 }
8765
8766 static enum elf_reloc_type_class
8767 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
8768 {
8769 switch ((int) ELF32_R_TYPE (rela->r_info))
8770 {
8771 case R_ARM_RELATIVE:
8772 return reloc_class_relative;
8773 case R_ARM_JUMP_SLOT:
8774 return reloc_class_plt;
8775 case R_ARM_COPY:
8776 return reloc_class_copy;
8777 default:
8778 return reloc_class_normal;
8779 }
8780 }
8781
8782 /* Set the right machine number for an Arm ELF file. */
8783
8784 static bfd_boolean
8785 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
8786 {
8787 if (hdr->sh_type == SHT_NOTE)
8788 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
8789
8790 return TRUE;
8791 }
8792
8793 static void
8794 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
8795 {
8796 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
8797 }
8798
8799 /* Return TRUE if this is an unwinding table entry. */
8800
8801 static bfd_boolean
8802 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
8803 {
8804 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
8805 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
8806 }
8807
8808
8809 /* Set the type and flags for an ARM section. We do this by
8810 the section name, which is a hack, but ought to work. */
8811
8812 static bfd_boolean
8813 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
8814 {
8815 const char * name;
8816
8817 name = bfd_get_section_name (abfd, sec);
8818
8819 if (is_arm_elf_unwind_section_name (abfd, name))
8820 {
8821 hdr->sh_type = SHT_ARM_EXIDX;
8822 hdr->sh_flags |= SHF_LINK_ORDER;
8823 }
8824 else if (strcmp(name, ".ARM.attributes") == 0)
8825 {
8826 hdr->sh_type = SHT_ARM_ATTRIBUTES;
8827 }
8828 return TRUE;
8829 }
8830
8831 /* Parse an Arm EABI attributes section. */
8832 static void
8833 elf32_arm_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr)
8834 {
8835 bfd_byte *contents;
8836 bfd_byte *p;
8837 bfd_vma len;
8838
8839 contents = bfd_malloc (hdr->sh_size);
8840 if (!contents)
8841 return;
8842 if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
8843 hdr->sh_size))
8844 {
8845 free (contents);
8846 return;
8847 }
8848 p = contents;
8849 if (*(p++) == 'A')
8850 {
8851 len = hdr->sh_size - 1;
8852 while (len > 0)
8853 {
8854 int namelen;
8855 bfd_vma section_len;
8856
8857 section_len = bfd_get_32 (abfd, p);
8858 p += 4;
8859 if (section_len > len)
8860 section_len = len;
8861 len -= section_len;
8862 namelen = strlen ((char *)p) + 1;
8863 section_len -= namelen + 4;
8864 if (strcmp((char *)p, "aeabi") != 0)
8865 {
8866 /* Vendor section. Ignore it. */
8867 p += namelen + section_len;
8868 }
8869 else
8870 {
8871 p += namelen;
8872 while (section_len > 0)
8873 {
8874 int tag;
8875 unsigned int n;
8876 unsigned int val;
8877 bfd_vma subsection_len;
8878 bfd_byte *end;
8879
8880 tag = read_unsigned_leb128 (abfd, p, &n);
8881 p += n;
8882 subsection_len = bfd_get_32 (abfd, p);
8883 p += 4;
8884 if (subsection_len > section_len)
8885 subsection_len = section_len;
8886 section_len -= subsection_len;
8887 subsection_len -= n + 4;
8888 end = p + subsection_len;
8889 switch (tag)
8890 {
8891 case Tag_File:
8892 while (p < end)
8893 {
8894 bfd_boolean is_string;
8895
8896 tag = read_unsigned_leb128 (abfd, p, &n);
8897 p += n;
8898 if (tag == 4 || tag == 5)
8899 is_string = 1;
8900 else if (tag < 32)
8901 is_string = 0;
8902 else
8903 is_string = (tag & 1) != 0;
8904 if (tag == Tag_compatibility)
8905 {
8906 val = read_unsigned_leb128 (abfd, p, &n);
8907 p += n;
8908 elf32_arm_add_eabi_attr_compat (abfd, val,
8909 (char *)p);
8910 p += strlen ((char *)p) + 1;
8911 }
8912 else if (is_string)
8913 {
8914 elf32_arm_add_eabi_attr_string (abfd, tag,
8915 (char *)p);
8916 p += strlen ((char *)p) + 1;
8917 }
8918 else
8919 {
8920 val = read_unsigned_leb128 (abfd, p, &n);
8921 p += n;
8922 elf32_arm_add_eabi_attr_int (abfd, tag, val);
8923 }
8924 }
8925 break;
8926 case Tag_Section:
8927 case Tag_Symbol:
8928 /* Don't have anywhere convenient to attach these.
8929 Fall through for now. */
8930 default:
8931 /* Ignore things we don't kow about. */
8932 p += subsection_len;
8933 subsection_len = 0;
8934 break;
8935 }
8936 }
8937 }
8938 }
8939 }
8940 free (contents);
8941 }
8942
8943 /* Handle an ARM specific section when reading an object file. This is
8944 called when bfd_section_from_shdr finds a section with an unknown
8945 type. */
8946
8947 static bfd_boolean
8948 elf32_arm_section_from_shdr (bfd *abfd,
8949 Elf_Internal_Shdr * hdr,
8950 const char *name,
8951 int shindex)
8952 {
8953 /* There ought to be a place to keep ELF backend specific flags, but
8954 at the moment there isn't one. We just keep track of the
8955 sections by their name, instead. Fortunately, the ABI gives
8956 names for all the ARM specific sections, so we will probably get
8957 away with this. */
8958 switch (hdr->sh_type)
8959 {
8960 case SHT_ARM_EXIDX:
8961 case SHT_ARM_PREEMPTMAP:
8962 case SHT_ARM_ATTRIBUTES:
8963 break;
8964
8965 default:
8966 return FALSE;
8967 }
8968
8969 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
8970 return FALSE;
8971
8972 if (hdr->sh_type == SHT_ARM_ATTRIBUTES)
8973 elf32_arm_parse_attributes(abfd, hdr);
8974 return TRUE;
8975 }
8976
8977 /* A structure used to record a list of sections, independently
8978 of the next and prev fields in the asection structure. */
8979 typedef struct section_list
8980 {
8981 asection * sec;
8982 struct section_list * next;
8983 struct section_list * prev;
8984 }
8985 section_list;
8986
8987 /* Unfortunately we need to keep a list of sections for which
8988 an _arm_elf_section_data structure has been allocated. This
8989 is because it is possible for functions like elf32_arm_write_section
8990 to be called on a section which has had an elf_data_structure
8991 allocated for it (and so the used_by_bfd field is valid) but
8992 for which the ARM extended version of this structure - the
8993 _arm_elf_section_data structure - has not been allocated. */
8994 static section_list * sections_with_arm_elf_section_data = NULL;
8995
8996 static void
8997 record_section_with_arm_elf_section_data (asection * sec)
8998 {
8999 struct section_list * entry;
9000
9001 entry = bfd_malloc (sizeof (* entry));
9002 if (entry == NULL)
9003 return;
9004 entry->sec = sec;
9005 entry->next = sections_with_arm_elf_section_data;
9006 entry->prev = NULL;
9007 if (entry->next != NULL)
9008 entry->next->prev = entry;
9009 sections_with_arm_elf_section_data = entry;
9010 }
9011
9012 static struct section_list *
9013 find_arm_elf_section_entry (asection * sec)
9014 {
9015 struct section_list * entry;
9016 static struct section_list * last_entry = NULL;
9017
9018 /* This is a short cut for the typical case where the sections are added
9019 to the sections_with_arm_elf_section_data list in forward order and
9020 then looked up here in backwards order. This makes a real difference
9021 to the ld-srec/sec64k.exp linker test. */
9022 entry = sections_with_arm_elf_section_data;
9023 if (last_entry != NULL)
9024 {
9025 if (last_entry->sec == sec)
9026 entry = last_entry;
9027 else if (last_entry->next != NULL
9028 && last_entry->next->sec == sec)
9029 entry = last_entry->next;
9030 }
9031
9032 for (; entry; entry = entry->next)
9033 if (entry->sec == sec)
9034 break;
9035
9036 if (entry)
9037 /* Record the entry prior to this one - it is the entry we are most
9038 likely to want to locate next time. Also this way if we have been
9039 called from unrecord_section_with_arm_elf_section_data() we will not
9040 be caching a pointer that is about to be freed. */
9041 last_entry = entry->prev;
9042
9043 return entry;
9044 }
9045
9046 static _arm_elf_section_data *
9047 get_arm_elf_section_data (asection * sec)
9048 {
9049 struct section_list * entry;
9050
9051 entry = find_arm_elf_section_entry (sec);
9052
9053 if (entry)
9054 return elf32_arm_section_data (entry->sec);
9055 else
9056 return NULL;
9057 }
9058
9059 static void
9060 unrecord_section_with_arm_elf_section_data (asection * sec)
9061 {
9062 struct section_list * entry;
9063
9064 entry = find_arm_elf_section_entry (sec);
9065
9066 if (entry)
9067 {
9068 if (entry->prev != NULL)
9069 entry->prev->next = entry->next;
9070 if (entry->next != NULL)
9071 entry->next->prev = entry->prev;
9072 if (entry == sections_with_arm_elf_section_data)
9073 sections_with_arm_elf_section_data = entry->next;
9074 free (entry);
9075 }
9076 }
9077
9078 /* Called for each symbol. Builds a section map based on mapping symbols.
9079 Does not alter any of the symbols. */
9080
9081 static bfd_boolean
9082 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
9083 const char *name,
9084 Elf_Internal_Sym *elfsym,
9085 asection *input_sec,
9086 struct elf_link_hash_entry *h)
9087 {
9088 int mapcount;
9089 elf32_arm_section_map *map;
9090 elf32_arm_section_map *newmap;
9091 _arm_elf_section_data *arm_data;
9092 struct elf32_arm_link_hash_table *globals;
9093
9094 globals = elf32_arm_hash_table (info);
9095 if (globals->vxworks_p
9096 && !elf_vxworks_link_output_symbol_hook (info, name, elfsym,
9097 input_sec, h))
9098 return FALSE;
9099
9100 /* Only do this on final link. */
9101 if (info->relocatable)
9102 return TRUE;
9103
9104 /* Only build a map if we need to byteswap code. */
9105 if (!globals->byteswap_code)
9106 return TRUE;
9107
9108 /* We only want mapping symbols. */
9109 if (!bfd_is_arm_special_symbol_name (name, BFD_ARM_SPECIAL_SYM_TYPE_MAP))
9110 return TRUE;
9111
9112 /* If this section has not been allocated an _arm_elf_section_data
9113 structure then we cannot record anything. */
9114 arm_data = get_arm_elf_section_data (input_sec);
9115 if (arm_data == NULL)
9116 return TRUE;
9117
9118 mapcount = arm_data->mapcount + 1;
9119 map = arm_data->map;
9120
9121 /* TODO: This may be inefficient, but we probably don't usually have many
9122 mapping symbols per section. */
9123 newmap = bfd_realloc (map, mapcount * sizeof (* map));
9124 if (newmap != NULL)
9125 {
9126 arm_data->map = newmap;
9127 arm_data->mapcount = mapcount;
9128
9129 newmap[mapcount - 1].vma = elfsym->st_value;
9130 newmap[mapcount - 1].type = name[1];
9131 }
9132
9133 return TRUE;
9134 }
9135
9136 typedef struct
9137 {
9138 void *finfo;
9139 struct bfd_link_info *info;
9140 int plt_shndx;
9141 bfd_vma plt_offset;
9142 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
9143 asection *, struct elf_link_hash_entry *);
9144 } output_arch_syminfo;
9145
9146 enum map_symbol_type
9147 {
9148 ARM_MAP_ARM,
9149 ARM_MAP_THUMB,
9150 ARM_MAP_DATA
9151 };
9152
9153
9154 /* Output a single PLT mapping symbol. */
9155
9156 static bfd_boolean
9157 elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi,
9158 enum map_symbol_type type,
9159 bfd_vma offset)
9160 {
9161 static const char *names[3] = {"$a", "$t", "$d"};
9162 struct elf32_arm_link_hash_table *htab;
9163 Elf_Internal_Sym sym;
9164
9165 htab = elf32_arm_hash_table (osi->info);
9166 sym.st_value = osi->plt_offset + offset;
9167 sym.st_size = 0;
9168 sym.st_other = 0;
9169 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
9170 sym.st_shndx = osi->plt_shndx;
9171 if (!osi->func (osi->finfo, names[type], &sym, htab->splt, NULL))
9172 return FALSE;
9173 return TRUE;
9174 }
9175
9176
9177 /* Output mapping symbols for PLT entries associated with H. */
9178
9179 static bfd_boolean
9180 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
9181 {
9182 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
9183 struct elf32_arm_link_hash_table *htab;
9184 struct elf32_arm_link_hash_entry *eh;
9185 bfd_vma addr;
9186
9187 htab = elf32_arm_hash_table (osi->info);
9188
9189 if (h->root.type == bfd_link_hash_indirect)
9190 return TRUE;
9191
9192 if (h->root.type == bfd_link_hash_warning)
9193 /* When warning symbols are created, they **replace** the "real"
9194 entry in the hash table, thus we never get to see the real
9195 symbol in a hash traversal. So look at it now. */
9196 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9197
9198 if (h->plt.offset == (bfd_vma) -1)
9199 return TRUE;
9200
9201 eh = (struct elf32_arm_link_hash_entry *) h;
9202 addr = h->plt.offset;
9203 if (htab->symbian_p)
9204 {
9205 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9206 return FALSE;
9207 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4))
9208 return FALSE;
9209 }
9210 else if (htab->vxworks_p)
9211 {
9212 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9213 return FALSE;
9214 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8))
9215 return FALSE;
9216 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12))
9217 return FALSE;
9218 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20))
9219 return FALSE;
9220 }
9221 else
9222 {
9223 bfd_boolean thumb_stub;
9224
9225 thumb_stub = eh->plt_thumb_refcount > 0 && !htab->use_blx;
9226 if (thumb_stub)
9227 {
9228 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4))
9229 return FALSE;
9230 }
9231 #ifdef FOUR_WORD_PLT
9232 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9233 return FALSE;
9234 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12))
9235 return FALSE;
9236 #else
9237 /* A three-word PLT with no Thumb thunk contains only Arm code,
9238 so only need to output a mapping symbol for the first PLT entry and
9239 entries with thumb thunks. */
9240 if (thumb_stub || addr == 20)
9241 {
9242 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9243 return FALSE;
9244 }
9245 #endif
9246 }
9247
9248 return TRUE;
9249 }
9250
9251
9252 /* Output mapping symbols for the PLT. */
9253
9254 static bfd_boolean
9255 elf32_arm_output_arch_local_syms (bfd *output_bfd,
9256 struct bfd_link_info *info,
9257 void *finfo, bfd_boolean (*func) (void *, const char *,
9258 Elf_Internal_Sym *,
9259 asection *,
9260 struct elf_link_hash_entry *))
9261 {
9262 output_arch_syminfo osi;
9263 struct elf32_arm_link_hash_table *htab;
9264
9265 htab = elf32_arm_hash_table (info);
9266 if (!htab->splt || htab->splt->size == 0)
9267 return TRUE;
9268
9269 check_use_blx(htab);
9270 osi.finfo = finfo;
9271 osi.info = info;
9272 osi.func = func;
9273 osi.plt_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
9274 htab->splt->output_section);
9275 osi.plt_offset = htab->splt->output_section->vma;
9276
9277 /* Output mapping symbols for the plt header. SymbianOS does not have a
9278 plt header. */
9279 if (htab->vxworks_p)
9280 {
9281 /* VxWorks shared libraries have no PLT header. */
9282 if (!info->shared)
9283 {
9284 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9285 return FALSE;
9286 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12))
9287 return FALSE;
9288 }
9289 }
9290 else if (!htab->symbian_p)
9291 {
9292 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9293 return FALSE;
9294 #ifndef FOUR_WORD_PLT
9295 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16))
9296 return FALSE;
9297 #endif
9298 }
9299
9300 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
9301 return TRUE;
9302 }
9303
9304 /* Allocate target specific section data. */
9305
9306 static bfd_boolean
9307 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
9308 {
9309 if (!sec->used_by_bfd)
9310 {
9311 _arm_elf_section_data *sdata;
9312 bfd_size_type amt = sizeof (*sdata);
9313
9314 sdata = bfd_zalloc (abfd, amt);
9315 if (sdata == NULL)
9316 return FALSE;
9317 sec->used_by_bfd = sdata;
9318 }
9319
9320 record_section_with_arm_elf_section_data (sec);
9321
9322 return _bfd_elf_new_section_hook (abfd, sec);
9323 }
9324
9325
9326 /* Used to order a list of mapping symbols by address. */
9327
9328 static int
9329 elf32_arm_compare_mapping (const void * a, const void * b)
9330 {
9331 return ((const elf32_arm_section_map *) a)->vma
9332 > ((const elf32_arm_section_map *) b)->vma;
9333 }
9334
9335
9336 /* Do code byteswapping. Return FALSE afterwards so that the section is
9337 written out as normal. */
9338
9339 static bfd_boolean
9340 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
9341 bfd_byte *contents)
9342 {
9343 int mapcount;
9344 _arm_elf_section_data *arm_data;
9345 elf32_arm_section_map *map;
9346 bfd_vma ptr;
9347 bfd_vma end;
9348 bfd_vma offset;
9349 bfd_byte tmp;
9350 int i;
9351
9352 /* If this section has not been allocated an _arm_elf_section_data
9353 structure then we cannot record anything. */
9354 arm_data = get_arm_elf_section_data (sec);
9355 if (arm_data == NULL)
9356 return FALSE;
9357
9358 mapcount = arm_data->mapcount;
9359 map = arm_data->map;
9360
9361 if (mapcount == 0)
9362 return FALSE;
9363
9364 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
9365
9366 offset = sec->output_section->vma + sec->output_offset;
9367 ptr = map[0].vma - offset;
9368 for (i = 0; i < mapcount; i++)
9369 {
9370 if (i == mapcount - 1)
9371 end = sec->size;
9372 else
9373 end = map[i + 1].vma - offset;
9374
9375 switch (map[i].type)
9376 {
9377 case 'a':
9378 /* Byte swap code words. */
9379 while (ptr + 3 < end)
9380 {
9381 tmp = contents[ptr];
9382 contents[ptr] = contents[ptr + 3];
9383 contents[ptr + 3] = tmp;
9384 tmp = contents[ptr + 1];
9385 contents[ptr + 1] = contents[ptr + 2];
9386 contents[ptr + 2] = tmp;
9387 ptr += 4;
9388 }
9389 break;
9390
9391 case 't':
9392 /* Byte swap code halfwords. */
9393 while (ptr + 1 < end)
9394 {
9395 tmp = contents[ptr];
9396 contents[ptr] = contents[ptr + 1];
9397 contents[ptr + 1] = tmp;
9398 ptr += 2;
9399 }
9400 break;
9401
9402 case 'd':
9403 /* Leave data alone. */
9404 break;
9405 }
9406 ptr = end;
9407 }
9408
9409 free (map);
9410 arm_data->mapcount = 0;
9411 arm_data->map = NULL;
9412 unrecord_section_with_arm_elf_section_data (sec);
9413
9414 return FALSE;
9415 }
9416
9417 static void
9418 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
9419 asection * sec,
9420 void * ignore ATTRIBUTE_UNUSED)
9421 {
9422 unrecord_section_with_arm_elf_section_data (sec);
9423 }
9424
9425 static bfd_boolean
9426 elf32_arm_close_and_cleanup (bfd * abfd)
9427 {
9428 if (abfd->sections)
9429 bfd_map_over_sections (abfd,
9430 unrecord_section_via_map_over_sections,
9431 NULL);
9432
9433 return _bfd_elf_close_and_cleanup (abfd);
9434 }
9435
9436 static bfd_boolean
9437 elf32_arm_bfd_free_cached_info (bfd * abfd)
9438 {
9439 if (abfd->sections)
9440 bfd_map_over_sections (abfd,
9441 unrecord_section_via_map_over_sections,
9442 NULL);
9443
9444 return _bfd_free_cached_info (abfd);
9445 }
9446
9447 /* Display STT_ARM_TFUNC symbols as functions. */
9448
9449 static void
9450 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
9451 asymbol *asym)
9452 {
9453 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
9454
9455 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
9456 elfsym->symbol.flags |= BSF_FUNCTION;
9457 }
9458
9459
9460 /* Mangle thumb function symbols as we read them in. */
9461
9462 static bfd_boolean
9463 elf32_arm_swap_symbol_in (bfd * abfd,
9464 const void *psrc,
9465 const void *pshn,
9466 Elf_Internal_Sym *dst)
9467 {
9468 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
9469 return FALSE;
9470
9471 /* New EABI objects mark thumb function symbols by setting the low bit of
9472 the address. Turn these into STT_ARM_TFUNC. */
9473 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
9474 && (dst->st_value & 1))
9475 {
9476 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
9477 dst->st_value &= ~(bfd_vma) 1;
9478 }
9479 return TRUE;
9480 }
9481
9482
9483 /* Mangle thumb function symbols as we write them out. */
9484
9485 static void
9486 elf32_arm_swap_symbol_out (bfd *abfd,
9487 const Elf_Internal_Sym *src,
9488 void *cdst,
9489 void *shndx)
9490 {
9491 Elf_Internal_Sym newsym;
9492
9493 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
9494 of the address set, as per the new EABI. We do this unconditionally
9495 because objcopy does not set the elf header flags until after
9496 it writes out the symbol table. */
9497 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
9498 {
9499 newsym = *src;
9500 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
9501 if (newsym.st_shndx != SHN_UNDEF)
9502 {
9503 /* Do this only for defined symbols. At link type, the static
9504 linker will simulate the work of dynamic linker of resolving
9505 symbols and will carry over the thumbness of found symbols to
9506 the output symbol table. It's not clear how it happens, but
9507 the thumbness of undefined symbols can well be different at
9508 runtime, and writing '1' for them will be confusing for users
9509 and possibly for dynamic linker itself.
9510 */
9511 newsym.st_value |= 1;
9512 }
9513
9514 src = &newsym;
9515 }
9516 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
9517 }
9518
9519 /* Add the PT_ARM_EXIDX program header. */
9520
9521 static bfd_boolean
9522 elf32_arm_modify_segment_map (bfd *abfd,
9523 struct bfd_link_info *info ATTRIBUTE_UNUSED)
9524 {
9525 struct elf_segment_map *m;
9526 asection *sec;
9527
9528 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
9529 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
9530 {
9531 /* If there is already a PT_ARM_EXIDX header, then we do not
9532 want to add another one. This situation arises when running
9533 "strip"; the input binary already has the header. */
9534 m = elf_tdata (abfd)->segment_map;
9535 while (m && m->p_type != PT_ARM_EXIDX)
9536 m = m->next;
9537 if (!m)
9538 {
9539 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
9540 if (m == NULL)
9541 return FALSE;
9542 m->p_type = PT_ARM_EXIDX;
9543 m->count = 1;
9544 m->sections[0] = sec;
9545
9546 m->next = elf_tdata (abfd)->segment_map;
9547 elf_tdata (abfd)->segment_map = m;
9548 }
9549 }
9550
9551 return TRUE;
9552 }
9553
9554 /* We may add a PT_ARM_EXIDX program header. */
9555
9556 static int
9557 elf32_arm_additional_program_headers (bfd *abfd,
9558 struct bfd_link_info *info ATTRIBUTE_UNUSED)
9559 {
9560 asection *sec;
9561
9562 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
9563 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
9564 return 1;
9565 else
9566 return 0;
9567 }
9568
9569 /* We use this to override swap_symbol_in and swap_symbol_out. */
9570 const struct elf_size_info elf32_arm_size_info = {
9571 sizeof (Elf32_External_Ehdr),
9572 sizeof (Elf32_External_Phdr),
9573 sizeof (Elf32_External_Shdr),
9574 sizeof (Elf32_External_Rel),
9575 sizeof (Elf32_External_Rela),
9576 sizeof (Elf32_External_Sym),
9577 sizeof (Elf32_External_Dyn),
9578 sizeof (Elf_External_Note),
9579 4,
9580 1,
9581 32, 2,
9582 ELFCLASS32, EV_CURRENT,
9583 bfd_elf32_write_out_phdrs,
9584 bfd_elf32_write_shdrs_and_ehdr,
9585 bfd_elf32_write_relocs,
9586 elf32_arm_swap_symbol_in,
9587 elf32_arm_swap_symbol_out,
9588 bfd_elf32_slurp_reloc_table,
9589 bfd_elf32_slurp_symbol_table,
9590 bfd_elf32_swap_dyn_in,
9591 bfd_elf32_swap_dyn_out,
9592 bfd_elf32_swap_reloc_in,
9593 bfd_elf32_swap_reloc_out,
9594 bfd_elf32_swap_reloca_in,
9595 bfd_elf32_swap_reloca_out
9596 };
9597
9598 #define ELF_ARCH bfd_arch_arm
9599 #define ELF_MACHINE_CODE EM_ARM
9600 #ifdef __QNXTARGET__
9601 #define ELF_MAXPAGESIZE 0x1000
9602 #else
9603 #define ELF_MAXPAGESIZE 0x8000
9604 #endif
9605 #define ELF_MINPAGESIZE 0x1000
9606 #define ELF_COMMONPAGESIZE 0x1000
9607
9608 #define bfd_elf32_mkobject elf32_arm_mkobject
9609
9610 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
9611 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
9612 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
9613 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
9614 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
9615 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
9616 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
9617 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
9618 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
9619 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
9620 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
9621 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
9622 #define bfd_elf32_bfd_final_link elf32_arm_bfd_final_link
9623
9624 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
9625 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
9626 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
9627 #define elf_backend_check_relocs elf32_arm_check_relocs
9628 #define elf_backend_relocate_section elf32_arm_relocate_section
9629 #define elf_backend_write_section elf32_arm_write_section
9630 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
9631 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
9632 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
9633 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
9634 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
9635 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
9636 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
9637 #define elf_backend_post_process_headers elf32_arm_post_process_headers
9638 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
9639 #define elf_backend_object_p elf32_arm_object_p
9640 #define elf_backend_section_flags elf32_arm_section_flags
9641 #define elf_backend_fake_sections elf32_arm_fake_sections
9642 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
9643 #define elf_backend_final_write_processing elf32_arm_final_write_processing
9644 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
9645 #define elf_backend_symbol_processing elf32_arm_symbol_processing
9646 #define elf_backend_size_info elf32_arm_size_info
9647 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
9648 #define elf_backend_additional_program_headers \
9649 elf32_arm_additional_program_headers
9650 #define elf_backend_output_arch_local_syms \
9651 elf32_arm_output_arch_local_syms
9652 #define elf_backend_begin_write_processing \
9653 elf32_arm_begin_write_processing
9654
9655 #define elf_backend_can_refcount 1
9656 #define elf_backend_can_gc_sections 1
9657 #define elf_backend_plt_readonly 1
9658 #define elf_backend_want_got_plt 1
9659 #define elf_backend_want_plt_sym 0
9660 #define elf_backend_may_use_rel_p 1
9661 #define elf_backend_may_use_rela_p 0
9662 #define elf_backend_default_use_rela_p 0
9663 #define elf_backend_rela_normal 0
9664
9665 #define elf_backend_got_header_size 12
9666
9667 #include "elf32-target.h"
9668
9669 /* VxWorks Targets */
9670
9671 #undef TARGET_LITTLE_SYM
9672 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
9673 #undef TARGET_LITTLE_NAME
9674 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
9675 #undef TARGET_BIG_SYM
9676 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
9677 #undef TARGET_BIG_NAME
9678 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
9679
9680 /* Like elf32_arm_link_hash_table_create -- but overrides
9681 appropriately for VxWorks. */
9682 static struct bfd_link_hash_table *
9683 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
9684 {
9685 struct bfd_link_hash_table *ret;
9686
9687 ret = elf32_arm_link_hash_table_create (abfd);
9688 if (ret)
9689 {
9690 struct elf32_arm_link_hash_table *htab
9691 = (struct elf32_arm_link_hash_table *) ret;
9692 htab->use_rel = 0;
9693 htab->vxworks_p = 1;
9694 }
9695 return ret;
9696 }
9697
9698 static void
9699 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9700 {
9701 elf32_arm_final_write_processing (abfd, linker);
9702 elf_vxworks_final_write_processing (abfd, linker);
9703 }
9704
9705 #undef elf32_bed
9706 #define elf32_bed elf32_arm_vxworks_bed
9707
9708 #undef bfd_elf32_bfd_link_hash_table_create
9709 #define bfd_elf32_bfd_link_hash_table_create \
9710 elf32_arm_vxworks_link_hash_table_create
9711 #undef elf_backend_add_symbol_hook
9712 #define elf_backend_add_symbol_hook \
9713 elf_vxworks_add_symbol_hook
9714 #undef elf_backend_final_write_processing
9715 #define elf_backend_final_write_processing \
9716 elf32_arm_vxworks_final_write_processing
9717 #undef elf_backend_emit_relocs
9718 #define elf_backend_emit_relocs \
9719 elf_vxworks_emit_relocs
9720
9721 #undef elf_backend_may_use_rel_p
9722 #define elf_backend_may_use_rel_p 0
9723 #undef elf_backend_may_use_rela_p
9724 #define elf_backend_may_use_rela_p 1
9725 #undef elf_backend_default_use_rela_p
9726 #define elf_backend_default_use_rela_p 1
9727 #undef elf_backend_rela_normal
9728 #define elf_backend_rela_normal 1
9729 #undef elf_backend_want_plt_sym
9730 #define elf_backend_want_plt_sym 1
9731 #undef ELF_MAXPAGESIZE
9732 #define ELF_MAXPAGESIZE 0x1000
9733
9734 #include "elf32-target.h"
9735
9736
9737 /* Symbian OS Targets */
9738
9739 #undef TARGET_LITTLE_SYM
9740 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
9741 #undef TARGET_LITTLE_NAME
9742 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
9743 #undef TARGET_BIG_SYM
9744 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
9745 #undef TARGET_BIG_NAME
9746 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
9747
9748 /* Like elf32_arm_link_hash_table_create -- but overrides
9749 appropriately for Symbian OS. */
9750 static struct bfd_link_hash_table *
9751 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
9752 {
9753 struct bfd_link_hash_table *ret;
9754
9755 ret = elf32_arm_link_hash_table_create (abfd);
9756 if (ret)
9757 {
9758 struct elf32_arm_link_hash_table *htab
9759 = (struct elf32_arm_link_hash_table *)ret;
9760 /* There is no PLT header for Symbian OS. */
9761 htab->plt_header_size = 0;
9762 /* The PLT entries are each three instructions. */
9763 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
9764 htab->symbian_p = 1;
9765 /* Symbian uses armv5t or above, so use_blx is always true. */
9766 htab->use_blx = 1;
9767 htab->root.is_relocatable_executable = 1;
9768 }
9769 return ret;
9770 }
9771
9772 static const struct bfd_elf_special_section
9773 elf32_arm_symbian_special_sections[] =
9774 {
9775 /* In a BPABI executable, the dynamic linking sections do not go in
9776 the loadable read-only segment. The post-linker may wish to
9777 refer to these sections, but they are not part of the final
9778 program image. */
9779 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
9780 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
9781 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
9782 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
9783 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
9784 /* These sections do not need to be writable as the SymbianOS
9785 postlinker will arrange things so that no dynamic relocation is
9786 required. */
9787 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
9788 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
9789 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
9790 { NULL, 0, 0, 0, 0 }
9791 };
9792
9793 static void
9794 elf32_arm_symbian_begin_write_processing (bfd *abfd,
9795 struct bfd_link_info *link_info)
9796 {
9797 /* BPABI objects are never loaded directly by an OS kernel; they are
9798 processed by a postlinker first, into an OS-specific format. If
9799 the D_PAGED bit is set on the file, BFD will align segments on
9800 page boundaries, so that an OS can directly map the file. With
9801 BPABI objects, that just results in wasted space. In addition,
9802 because we clear the D_PAGED bit, map_sections_to_segments will
9803 recognize that the program headers should not be mapped into any
9804 loadable segment. */
9805 abfd->flags &= ~D_PAGED;
9806 elf32_arm_begin_write_processing(abfd, link_info);
9807 }
9808
9809 static bfd_boolean
9810 elf32_arm_symbian_modify_segment_map (bfd *abfd,
9811 struct bfd_link_info *info)
9812 {
9813 struct elf_segment_map *m;
9814 asection *dynsec;
9815
9816 /* BPABI shared libraries and executables should have a PT_DYNAMIC
9817 segment. However, because the .dynamic section is not marked
9818 with SEC_LOAD, the generic ELF code will not create such a
9819 segment. */
9820 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
9821 if (dynsec)
9822 {
9823 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
9824 if (m->p_type == PT_DYNAMIC)
9825 break;
9826
9827 if (m == NULL)
9828 {
9829 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
9830 m->next = elf_tdata (abfd)->segment_map;
9831 elf_tdata (abfd)->segment_map = m;
9832 }
9833 }
9834
9835 /* Also call the generic arm routine. */
9836 return elf32_arm_modify_segment_map (abfd, info);
9837 }
9838
9839 #undef elf32_bed
9840 #define elf32_bed elf32_arm_symbian_bed
9841
9842 /* The dynamic sections are not allocated on SymbianOS; the postlinker
9843 will process them and then discard them. */
9844 #undef ELF_DYNAMIC_SEC_FLAGS
9845 #define ELF_DYNAMIC_SEC_FLAGS \
9846 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
9847
9848 #undef bfd_elf32_bfd_link_hash_table_create
9849 #define bfd_elf32_bfd_link_hash_table_create \
9850 elf32_arm_symbian_link_hash_table_create
9851 #undef elf_backend_add_symbol_hook
9852
9853 #undef elf_backend_special_sections
9854 #define elf_backend_special_sections elf32_arm_symbian_special_sections
9855
9856 #undef elf_backend_begin_write_processing
9857 #define elf_backend_begin_write_processing \
9858 elf32_arm_symbian_begin_write_processing
9859 #undef elf_backend_final_write_processing
9860 #define elf_backend_final_write_processing \
9861 elf32_arm_final_write_processing
9862 #undef elf_backend_emit_relocs
9863
9864 #undef elf_backend_modify_segment_map
9865 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
9866
9867 /* There is no .got section for BPABI objects, and hence no header. */
9868 #undef elf_backend_got_header_size
9869 #define elf_backend_got_header_size 0
9870
9871 /* Similarly, there is no .got.plt section. */
9872 #undef elf_backend_want_got_plt
9873 #define elf_backend_want_got_plt 0
9874
9875 #undef elf_backend_may_use_rel_p
9876 #define elf_backend_may_use_rel_p 1
9877 #undef elf_backend_may_use_rela_p
9878 #define elf_backend_may_use_rela_p 0
9879 #undef elf_backend_default_use_rela_p
9880 #define elf_backend_default_use_rela_p 0
9881 #undef elf_backend_rela_normal
9882 #define elf_backend_rela_normal 0
9883 #undef elf_backend_want_plt_sym
9884 #define elf_backend_want_plt_sym 0
9885 #undef ELF_MAXPAGESIZE
9886 #define ELF_MAXPAGESIZE 0x8000
9887
9888 #include "elf32-target.h"
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