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ld/
[binutils.git] / bfd / elf32-arm.c
blobe8be0d5d927da8f83a76040cb13e1a88ec7264be
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 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 static reloc_howto_type *
1791 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1792 const char *r_name)
1793 {
1794 unsigned int i;
1795
1796 for (i = 0;
1797 i < (sizeof (elf32_arm_howto_table_1)
1798 / sizeof (elf32_arm_howto_table_1[0]));
1799 i++)
1800 if (elf32_arm_howto_table_1[i].name != NULL
1801 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1802 return &elf32_arm_howto_table_1[i];
1803
1804 for (i = 0;
1805 i < (sizeof (elf32_arm_howto_table_2)
1806 / sizeof (elf32_arm_howto_table_2[0]));
1807 i++)
1808 if (elf32_arm_howto_table_2[i].name != NULL
1809 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1810 return &elf32_arm_howto_table_2[i];
1811
1812 return NULL;
1813 }
1814
1815 /* Support for core dump NOTE sections */
1816 static bfd_boolean
1817 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1818 {
1819 int offset;
1820 size_t size;
1821
1822 switch (note->descsz)
1823 {
1824 default:
1825 return FALSE;
1826
1827 case 148: /* Linux/ARM 32-bit*/
1828 /* pr_cursig */
1829 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1830
1831 /* pr_pid */
1832 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1833
1834 /* pr_reg */
1835 offset = 72;
1836 size = 72;
1837
1838 break;
1839 }
1840
1841 /* Make a ".reg/999" section. */
1842 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1843 size, note->descpos + offset);
1844 }
1845
1846 static bfd_boolean
1847 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1848 {
1849 switch (note->descsz)
1850 {
1851 default:
1852 return FALSE;
1853
1854 case 124: /* Linux/ARM elf_prpsinfo */
1855 elf_tdata (abfd)->core_program
1856 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1857 elf_tdata (abfd)->core_command
1858 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1859 }
1860
1861 /* Note that for some reason, a spurious space is tacked
1862 onto the end of the args in some (at least one anyway)
1863 implementations, so strip it off if it exists. */
1864
1865 {
1866 char *command = elf_tdata (abfd)->core_command;
1867 int n = strlen (command);
1868
1869 if (0 < n && command[n - 1] == ' ')
1870 command[n - 1] = '\0';
1871 }
1872
1873 return TRUE;
1874 }
1875
1876 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1877 #define TARGET_LITTLE_NAME "elf32-littlearm"
1878 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1879 #define TARGET_BIG_NAME "elf32-bigarm"
1880
1881 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1882 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1883
1884 typedef unsigned long int insn32;
1885 typedef unsigned short int insn16;
1886
1887 /* In lieu of proper flags, assume all EABIv4 or later objects are
1888 interworkable. */
1889 #define INTERWORK_FLAG(abfd) \
1890 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1891 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1892
1893 /* The linker script knows the section names for placement.
1894 The entry_names are used to do simple name mangling on the stubs.
1895 Given a function name, and its type, the stub can be found. The
1896 name can be changed. The only requirement is the %s be present. */
1897 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1898 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1899
1900 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1901 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1902
1903 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1904 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1905
1906 /* The name of the dynamic interpreter. This is put in the .interp
1907 section. */
1908 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1909
1910 #ifdef FOUR_WORD_PLT
1911
1912 /* The first entry in a procedure linkage table looks like
1913 this. It is set up so that any shared library function that is
1914 called before the relocation has been set up calls the dynamic
1915 linker first. */
1916 static const bfd_vma elf32_arm_plt0_entry [] =
1917 {
1918 0xe52de004, /* str lr, [sp, #-4]! */
1919 0xe59fe010, /* ldr lr, [pc, #16] */
1920 0xe08fe00e, /* add lr, pc, lr */
1921 0xe5bef008, /* ldr pc, [lr, #8]! */
1922 };
1923
1924 /* Subsequent entries in a procedure linkage table look like
1925 this. */
1926 static const bfd_vma elf32_arm_plt_entry [] =
1927 {
1928 0xe28fc600, /* add ip, pc, #NN */
1929 0xe28cca00, /* add ip, ip, #NN */
1930 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1931 0x00000000, /* unused */
1932 };
1933
1934 #else
1935
1936 /* The first entry in a procedure linkage table looks like
1937 this. It is set up so that any shared library function that is
1938 called before the relocation has been set up calls the dynamic
1939 linker first. */
1940 static const bfd_vma elf32_arm_plt0_entry [] =
1941 {
1942 0xe52de004, /* str lr, [sp, #-4]! */
1943 0xe59fe004, /* ldr lr, [pc, #4] */
1944 0xe08fe00e, /* add lr, pc, lr */
1945 0xe5bef008, /* ldr pc, [lr, #8]! */
1946 0x00000000, /* &GOT[0] - . */
1947 };
1948
1949 /* Subsequent entries in a procedure linkage table look like
1950 this. */
1951 static const bfd_vma elf32_arm_plt_entry [] =
1952 {
1953 0xe28fc600, /* add ip, pc, #0xNN00000 */
1954 0xe28cca00, /* add ip, ip, #0xNN000 */
1955 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1956 };
1957
1958 #endif
1959
1960 /* The format of the first entry in the procedure linkage table
1961 for a VxWorks executable. */
1962 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1963 {
1964 0xe52dc008, /* str ip,[sp,#-8]! */
1965 0xe59fc000, /* ldr ip,[pc] */
1966 0xe59cf008, /* ldr pc,[ip,#8] */
1967 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1968 };
1969
1970 /* The format of subsequent entries in a VxWorks executable. */
1971 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1972 {
1973 0xe59fc000, /* ldr ip,[pc] */
1974 0xe59cf000, /* ldr pc,[ip] */
1975 0x00000000, /* .long @got */
1976 0xe59fc000, /* ldr ip,[pc] */
1977 0xea000000, /* b _PLT */
1978 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1979 };
1980
1981 /* The format of entries in a VxWorks shared library. */
1982 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1983 {
1984 0xe59fc000, /* ldr ip,[pc] */
1985 0xe79cf009, /* ldr pc,[ip,r9] */
1986 0x00000000, /* .long @got */
1987 0xe59fc000, /* ldr ip,[pc] */
1988 0xe599f008, /* ldr pc,[r9,#8] */
1989 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1990 };
1991
1992 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1993 #define PLT_THUMB_STUB_SIZE 4
1994 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1995 {
1996 0x4778, /* bx pc */
1997 0x46c0 /* nop */
1998 };
1999
2000 /* The entries in a PLT when using a DLL-based target with multiple
2001 address spaces. */
2002 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2003 {
2004 0xe51ff004, /* ldr pc, [pc, #-4] */
2005 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2006 };
2007
2008 /* Used to build a map of a section. This is required for mixed-endian
2009 code/data. */
2010
2011 typedef struct elf32_elf_section_map
2012 {
2013 bfd_vma vma;
2014 char type;
2015 }
2016 elf32_arm_section_map;
2017
2018 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2019
2020 typedef enum
2021 {
2022 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2023 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2024 VFP11_ERRATUM_ARM_VENEER,
2025 VFP11_ERRATUM_THUMB_VENEER
2026 }
2027 elf32_vfp11_erratum_type;
2028
2029 typedef struct elf32_vfp11_erratum_list
2030 {
2031 struct elf32_vfp11_erratum_list *next;
2032 bfd_vma vma;
2033 union
2034 {
2035 struct
2036 {
2037 struct elf32_vfp11_erratum_list *veneer;
2038 unsigned int vfp_insn;
2039 } b;
2040 struct
2041 {
2042 struct elf32_vfp11_erratum_list *branch;
2043 unsigned int id;
2044 } v;
2045 } u;
2046 elf32_vfp11_erratum_type type;
2047 }
2048 elf32_vfp11_erratum_list;
2049
2050 typedef struct _arm_elf_section_data
2051 {
2052 struct bfd_elf_section_data elf;
2053 unsigned int mapcount;
2054 unsigned int mapsize;
2055 elf32_arm_section_map *map;
2056 unsigned int erratumcount;
2057 elf32_vfp11_erratum_list *erratumlist;
2058 }
2059 _arm_elf_section_data;
2060
2061 #define elf32_arm_section_data(sec) \
2062 ((_arm_elf_section_data *) elf_section_data (sec))
2063
2064 /* The size of the thread control block. */
2065 #define TCB_SIZE 8
2066
2067 #define NUM_KNOWN_ATTRIBUTES 32
2068
2069 typedef struct aeabi_attribute
2070 {
2071 int type;
2072 unsigned int i;
2073 char *s;
2074 } aeabi_attribute;
2075
2076 typedef struct aeabi_attribute_list
2077 {
2078 struct aeabi_attribute_list *next;
2079 int tag;
2080 aeabi_attribute attr;
2081 } aeabi_attribute_list;
2082
2083 struct elf32_arm_obj_tdata
2084 {
2085 struct elf_obj_tdata root;
2086
2087 /* tls_type for each local got entry. */
2088 char *local_got_tls_type;
2089
2090 aeabi_attribute known_eabi_attributes[NUM_KNOWN_ATTRIBUTES];
2091 aeabi_attribute_list *other_eabi_attributes;
2092
2093 /* Zero to warn when linking objects with incompatible enum sizes. */
2094 int no_enum_size_warning;
2095 };
2096
2097 #define elf32_arm_tdata(abfd) \
2098 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
2099
2100 #define elf32_arm_local_got_tls_type(abfd) \
2101 (elf32_arm_tdata (abfd)->local_got_tls_type)
2102
2103 static bfd_boolean
2104 elf32_arm_mkobject (bfd *abfd)
2105 {
2106 if (abfd->tdata.any == NULL)
2107 {
2108 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
2109 abfd->tdata.any = bfd_zalloc (abfd, amt);
2110 if (abfd->tdata.any == NULL)
2111 return FALSE;
2112 }
2113 return bfd_elf_mkobject (abfd);
2114 }
2115
2116 /* The ARM linker needs to keep track of the number of relocs that it
2117 decides to copy in check_relocs for each symbol. This is so that
2118 it can discard PC relative relocs if it doesn't need them when
2119 linking with -Bsymbolic. We store the information in a field
2120 extending the regular ELF linker hash table. */
2121
2122 /* This structure keeps track of the number of relocs we have copied
2123 for a given symbol. */
2124 struct elf32_arm_relocs_copied
2125 {
2126 /* Next section. */
2127 struct elf32_arm_relocs_copied * next;
2128 /* A section in dynobj. */
2129 asection * section;
2130 /* Number of relocs copied in this section. */
2131 bfd_size_type count;
2132 /* Number of PC-relative relocs copied in this section. */
2133 bfd_size_type pc_count;
2134 };
2135
2136 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2137
2138 /* Arm ELF linker hash entry. */
2139 struct elf32_arm_link_hash_entry
2140 {
2141 struct elf_link_hash_entry root;
2142
2143 /* Number of PC relative relocs copied for this symbol. */
2144 struct elf32_arm_relocs_copied * relocs_copied;
2145
2146 /* We reference count Thumb references to a PLT entry separately,
2147 so that we can emit the Thumb trampoline only if needed. */
2148 bfd_signed_vma plt_thumb_refcount;
2149
2150 /* Since PLT entries have variable size if the Thumb prologue is
2151 used, we need to record the index into .got.plt instead of
2152 recomputing it from the PLT offset. */
2153 bfd_signed_vma plt_got_offset;
2154
2155 #define GOT_UNKNOWN 0
2156 #define GOT_NORMAL 1
2157 #define GOT_TLS_GD 2
2158 #define GOT_TLS_IE 4
2159 unsigned char tls_type;
2160
2161 /* The symbol marking the real symbol location for exported thumb
2162 symbols with Arm stubs. */
2163 struct elf_link_hash_entry *export_glue;
2164 };
2165
2166 /* Traverse an arm ELF linker hash table. */
2167 #define elf32_arm_link_hash_traverse(table, func, info) \
2168 (elf_link_hash_traverse \
2169 (&(table)->root, \
2170 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2171 (info)))
2172
2173 /* Get the ARM elf linker hash table from a link_info structure. */
2174 #define elf32_arm_hash_table(info) \
2175 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2176
2177 /* ARM ELF linker hash table. */
2178 struct elf32_arm_link_hash_table
2179 {
2180 /* The main hash table. */
2181 struct elf_link_hash_table root;
2182
2183 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2184 bfd_size_type thumb_glue_size;
2185
2186 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2187 bfd_size_type arm_glue_size;
2188
2189 /* The size in bytes of the section containing glue for VFP11 erratum
2190 veneers. */
2191 bfd_size_type vfp11_erratum_glue_size;
2192
2193 /* An arbitrary input BFD chosen to hold the glue sections. */
2194 bfd * bfd_of_glue_owner;
2195
2196 /* Nonzero to output a BE8 image. */
2197 int byteswap_code;
2198
2199 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2200 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2201 int target1_is_rel;
2202
2203 /* The relocation to use for R_ARM_TARGET2 relocations. */
2204 int target2_reloc;
2205
2206 /* Nonzero to fix BX instructions for ARMv4 targets. */
2207 int fix_v4bx;
2208
2209 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2210 int use_blx;
2211
2212 /* What sort of code sequences we should look for which may trigger the
2213 VFP11 denorm erratum. */
2214 bfd_arm_vfp11_fix vfp11_fix;
2215
2216 /* Global counter for the number of fixes we have emitted. */
2217 int num_vfp11_fixes;
2218
2219 /* Nonzero to force PIC branch veneers. */
2220 int pic_veneer;
2221
2222 /* The number of bytes in the initial entry in the PLT. */
2223 bfd_size_type plt_header_size;
2224
2225 /* The number of bytes in the subsequent PLT etries. */
2226 bfd_size_type plt_entry_size;
2227
2228 /* True if the target system is VxWorks. */
2229 int vxworks_p;
2230
2231 /* True if the target system is Symbian OS. */
2232 int symbian_p;
2233
2234 /* True if the target uses REL relocations. */
2235 int use_rel;
2236
2237 /* Short-cuts to get to dynamic linker sections. */
2238 asection *sgot;
2239 asection *sgotplt;
2240 asection *srelgot;
2241 asection *splt;
2242 asection *srelplt;
2243 asection *sdynbss;
2244 asection *srelbss;
2245
2246 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2247 asection *srelplt2;
2248
2249 /* Data for R_ARM_TLS_LDM32 relocations. */
2250 union {
2251 bfd_signed_vma refcount;
2252 bfd_vma offset;
2253 } tls_ldm_got;
2254
2255 /* Small local sym to section mapping cache. */
2256 struct sym_sec_cache sym_sec;
2257
2258 /* For convenience in allocate_dynrelocs. */
2259 bfd * obfd;
2260 };
2261
2262 /* Create an entry in an ARM ELF linker hash table. */
2263
2264 static struct bfd_hash_entry *
2265 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2266 struct bfd_hash_table * table,
2267 const char * string)
2268 {
2269 struct elf32_arm_link_hash_entry * ret =
2270 (struct elf32_arm_link_hash_entry *) entry;
2271
2272 /* Allocate the structure if it has not already been allocated by a
2273 subclass. */
2274 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
2275 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2276 if (ret == NULL)
2277 return (struct bfd_hash_entry *) ret;
2278
2279 /* Call the allocation method of the superclass. */
2280 ret = ((struct elf32_arm_link_hash_entry *)
2281 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2282 table, string));
2283 if (ret != NULL)
2284 {
2285 ret->relocs_copied = NULL;
2286 ret->tls_type = GOT_UNKNOWN;
2287 ret->plt_thumb_refcount = 0;
2288 ret->plt_got_offset = -1;
2289 ret->export_glue = NULL;
2290 }
2291
2292 return (struct bfd_hash_entry *) ret;
2293 }
2294
2295 /* Return true if NAME is the name of the relocation section associated
2296 with S. */
2297
2298 static bfd_boolean
2299 reloc_section_p (struct elf32_arm_link_hash_table *htab,
2300 const char *name, asection *s)
2301 {
2302 if (htab->use_rel)
2303 return CONST_STRNEQ (name, ".rel") && strcmp (s->name, name + 4) == 0;
2304 else
2305 return CONST_STRNEQ (name, ".rela") && strcmp (s->name, name + 5) == 0;
2306 }
2307
2308 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2309 shortcuts to them in our hash table. */
2310
2311 static bfd_boolean
2312 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2313 {
2314 struct elf32_arm_link_hash_table *htab;
2315
2316 htab = elf32_arm_hash_table (info);
2317 /* BPABI objects never have a GOT, or associated sections. */
2318 if (htab->symbian_p)
2319 return TRUE;
2320
2321 if (! _bfd_elf_create_got_section (dynobj, info))
2322 return FALSE;
2323
2324 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2325 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2326 if (!htab->sgot || !htab->sgotplt)
2327 abort ();
2328
2329 htab->srelgot = bfd_make_section_with_flags (dynobj,
2330 RELOC_SECTION (htab, ".got"),
2331 (SEC_ALLOC | SEC_LOAD
2332 | SEC_HAS_CONTENTS
2333 | SEC_IN_MEMORY
2334 | SEC_LINKER_CREATED
2335 | SEC_READONLY));
2336 if (htab->srelgot == NULL
2337 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2338 return FALSE;
2339 return TRUE;
2340 }
2341
2342 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2343 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2344 hash table. */
2345
2346 static bfd_boolean
2347 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2348 {
2349 struct elf32_arm_link_hash_table *htab;
2350
2351 htab = elf32_arm_hash_table (info);
2352 if (!htab->sgot && !create_got_section (dynobj, info))
2353 return FALSE;
2354
2355 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2356 return FALSE;
2357
2358 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2359 htab->srelplt = bfd_get_section_by_name (dynobj,
2360 RELOC_SECTION (htab, ".plt"));
2361 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2362 if (!info->shared)
2363 htab->srelbss = bfd_get_section_by_name (dynobj,
2364 RELOC_SECTION (htab, ".bss"));
2365
2366 if (htab->vxworks_p)
2367 {
2368 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2369 return FALSE;
2370
2371 if (info->shared)
2372 {
2373 htab->plt_header_size = 0;
2374 htab->plt_entry_size
2375 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2376 }
2377 else
2378 {
2379 htab->plt_header_size
2380 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2381 htab->plt_entry_size
2382 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2383 }
2384 }
2385
2386 if (!htab->splt
2387 || !htab->srelplt
2388 || !htab->sdynbss
2389 || (!info->shared && !htab->srelbss))
2390 abort ();
2391
2392 return TRUE;
2393 }
2394
2395 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2396
2397 static void
2398 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2399 struct elf_link_hash_entry *dir,
2400 struct elf_link_hash_entry *ind)
2401 {
2402 struct elf32_arm_link_hash_entry *edir, *eind;
2403
2404 edir = (struct elf32_arm_link_hash_entry *) dir;
2405 eind = (struct elf32_arm_link_hash_entry *) ind;
2406
2407 if (eind->relocs_copied != NULL)
2408 {
2409 if (edir->relocs_copied != NULL)
2410 {
2411 struct elf32_arm_relocs_copied **pp;
2412 struct elf32_arm_relocs_copied *p;
2413
2414 /* Add reloc counts against the indirect sym to the direct sym
2415 list. Merge any entries against the same section. */
2416 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2417 {
2418 struct elf32_arm_relocs_copied *q;
2419
2420 for (q = edir->relocs_copied; q != NULL; q = q->next)
2421 if (q->section == p->section)
2422 {
2423 q->pc_count += p->pc_count;
2424 q->count += p->count;
2425 *pp = p->next;
2426 break;
2427 }
2428 if (q == NULL)
2429 pp = &p->next;
2430 }
2431 *pp = edir->relocs_copied;
2432 }
2433
2434 edir->relocs_copied = eind->relocs_copied;
2435 eind->relocs_copied = NULL;
2436 }
2437
2438 if (ind->root.type == bfd_link_hash_indirect)
2439 {
2440 /* Copy over PLT info. */
2441 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2442 eind->plt_thumb_refcount = 0;
2443
2444 if (dir->got.refcount <= 0)
2445 {
2446 edir->tls_type = eind->tls_type;
2447 eind->tls_type = GOT_UNKNOWN;
2448 }
2449 }
2450
2451 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2452 }
2453
2454 /* Create an ARM elf linker hash table. */
2455
2456 static struct bfd_link_hash_table *
2457 elf32_arm_link_hash_table_create (bfd *abfd)
2458 {
2459 struct elf32_arm_link_hash_table *ret;
2460 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2461
2462 ret = bfd_malloc (amt);
2463 if (ret == NULL)
2464 return NULL;
2465
2466 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2467 elf32_arm_link_hash_newfunc,
2468 sizeof (struct elf32_arm_link_hash_entry)))
2469 {
2470 free (ret);
2471 return NULL;
2472 }
2473
2474 ret->sgot = NULL;
2475 ret->sgotplt = NULL;
2476 ret->srelgot = NULL;
2477 ret->splt = NULL;
2478 ret->srelplt = NULL;
2479 ret->sdynbss = NULL;
2480 ret->srelbss = NULL;
2481 ret->srelplt2 = NULL;
2482 ret->thumb_glue_size = 0;
2483 ret->arm_glue_size = 0;
2484 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2485 ret->vfp11_erratum_glue_size = 0;
2486 ret->num_vfp11_fixes = 0;
2487 ret->bfd_of_glue_owner = NULL;
2488 ret->byteswap_code = 0;
2489 ret->target1_is_rel = 0;
2490 ret->target2_reloc = R_ARM_NONE;
2491 #ifdef FOUR_WORD_PLT
2492 ret->plt_header_size = 16;
2493 ret->plt_entry_size = 16;
2494 #else
2495 ret->plt_header_size = 20;
2496 ret->plt_entry_size = 12;
2497 #endif
2498 ret->fix_v4bx = 0;
2499 ret->use_blx = 0;
2500 ret->vxworks_p = 0;
2501 ret->symbian_p = 0;
2502 ret->use_rel = 1;
2503 ret->sym_sec.abfd = NULL;
2504 ret->obfd = abfd;
2505 ret->tls_ldm_got.refcount = 0;
2506
2507 return &ret->root.root;
2508 }
2509
2510 /* Locate the Thumb encoded calling stub for NAME. */
2511
2512 static struct elf_link_hash_entry *
2513 find_thumb_glue (struct bfd_link_info *link_info,
2514 const char *name,
2515 char **error_message)
2516 {
2517 char *tmp_name;
2518 struct elf_link_hash_entry *hash;
2519 struct elf32_arm_link_hash_table *hash_table;
2520
2521 /* We need a pointer to the armelf specific hash table. */
2522 hash_table = elf32_arm_hash_table (link_info);
2523
2524 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2525 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2526
2527 BFD_ASSERT (tmp_name);
2528
2529 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2530
2531 hash = elf_link_hash_lookup
2532 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2533
2534 if (hash == NULL)
2535 asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
2536 tmp_name, name);
2537
2538 free (tmp_name);
2539
2540 return hash;
2541 }
2542
2543 /* Locate the ARM encoded calling stub for NAME. */
2544
2545 static struct elf_link_hash_entry *
2546 find_arm_glue (struct bfd_link_info *link_info,
2547 const char *name,
2548 char **error_message)
2549 {
2550 char *tmp_name;
2551 struct elf_link_hash_entry *myh;
2552 struct elf32_arm_link_hash_table *hash_table;
2553
2554 /* We need a pointer to the elfarm specific hash table. */
2555 hash_table = elf32_arm_hash_table (link_info);
2556
2557 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2558 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2559
2560 BFD_ASSERT (tmp_name);
2561
2562 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2563
2564 myh = elf_link_hash_lookup
2565 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2566
2567 if (myh == NULL)
2568 asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
2569 tmp_name, name);
2570
2571 free (tmp_name);
2572
2573 return myh;
2574 }
2575
2576 /* ARM->Thumb glue (static images):
2577
2578 .arm
2579 __func_from_arm:
2580 ldr r12, __func_addr
2581 bx r12
2582 __func_addr:
2583 .word func @ behave as if you saw a ARM_32 reloc.
2584
2585 (relocatable images)
2586 .arm
2587 __func_from_arm:
2588 ldr r12, __func_offset
2589 add r12, r12, pc
2590 bx r12
2591 __func_offset:
2592 .word func - .
2593 */
2594
2595 #define ARM2THUMB_STATIC_GLUE_SIZE 12
2596 static const insn32 a2t1_ldr_insn = 0xe59fc000;
2597 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
2598 static const insn32 a2t3_func_addr_insn = 0x00000001;
2599
2600 #define ARM2THUMB_PIC_GLUE_SIZE 16
2601 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
2602 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
2603 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
2604
2605 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
2606
2607 .thumb .thumb
2608 .align 2 .align 2
2609 __func_from_thumb: __func_from_thumb:
2610 bx pc push {r6, lr}
2611 nop ldr r6, __func_addr
2612 .arm mov lr, pc
2613 __func_change_to_arm: bx r6
2614 b func .arm
2615 __func_back_to_thumb:
2616 ldmia r13! {r6, lr}
2617 bx lr
2618 __func_addr:
2619 .word func */
2620
2621 #define THUMB2ARM_GLUE_SIZE 8
2622 static const insn16 t2a1_bx_pc_insn = 0x4778;
2623 static const insn16 t2a2_noop_insn = 0x46c0;
2624 static const insn32 t2a3_b_insn = 0xea000000;
2625
2626 #define VFP11_ERRATUM_VENEER_SIZE 8
2627
2628 #ifndef ELFARM_NABI_C_INCLUDED
2629 bfd_boolean
2630 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
2631 {
2632 asection * s;
2633 bfd_byte * foo;
2634 struct elf32_arm_link_hash_table * globals;
2635
2636 globals = elf32_arm_hash_table (info);
2637
2638 BFD_ASSERT (globals != NULL);
2639
2640 if (globals->arm_glue_size != 0)
2641 {
2642 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2643
2644 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2645 ARM2THUMB_GLUE_SECTION_NAME);
2646
2647 BFD_ASSERT (s != NULL);
2648
2649 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
2650
2651 BFD_ASSERT (s->size == globals->arm_glue_size);
2652 s->contents = foo;
2653 }
2654
2655 if (globals->thumb_glue_size != 0)
2656 {
2657 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2658
2659 s = bfd_get_section_by_name
2660 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2661
2662 BFD_ASSERT (s != NULL);
2663
2664 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
2665
2666 BFD_ASSERT (s->size == globals->thumb_glue_size);
2667 s->contents = foo;
2668 }
2669
2670 if (globals->vfp11_erratum_glue_size != 0)
2671 {
2672 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2673
2674 s = bfd_get_section_by_name
2675 (globals->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
2676
2677 BFD_ASSERT (s != NULL);
2678
2679 foo = bfd_alloc (globals->bfd_of_glue_owner,
2680 globals->vfp11_erratum_glue_size);
2681
2682 BFD_ASSERT (s->size == globals->vfp11_erratum_glue_size);
2683 s->contents = foo;
2684 }
2685
2686 return TRUE;
2687 }
2688
2689 /* Allocate space and symbols for calling a Thumb function from Arm mode.
2690 returns the symbol identifying teh stub. */
2691 static struct elf_link_hash_entry *
2692 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
2693 struct elf_link_hash_entry * h)
2694 {
2695 const char * name = h->root.root.string;
2696 asection * s;
2697 char * tmp_name;
2698 struct elf_link_hash_entry * myh;
2699 struct bfd_link_hash_entry * bh;
2700 struct elf32_arm_link_hash_table * globals;
2701 bfd_vma val;
2702 bfd_size_type size;
2703
2704 globals = elf32_arm_hash_table (link_info);
2705
2706 BFD_ASSERT (globals != NULL);
2707 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2708
2709 s = bfd_get_section_by_name
2710 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
2711
2712 BFD_ASSERT (s != NULL);
2713
2714 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2715
2716 BFD_ASSERT (tmp_name);
2717
2718 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2719
2720 myh = elf_link_hash_lookup
2721 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
2722
2723 if (myh != NULL)
2724 {
2725 /* We've already seen this guy. */
2726 free (tmp_name);
2727 return myh;
2728 }
2729
2730 /* The only trick here is using hash_table->arm_glue_size as the value.
2731 Even though the section isn't allocated yet, this is where we will be
2732 putting it. */
2733 bh = NULL;
2734 val = globals->arm_glue_size + 1;
2735 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2736 tmp_name, BSF_GLOBAL, s, val,
2737 NULL, TRUE, FALSE, &bh);
2738
2739 myh = (struct elf_link_hash_entry *) bh;
2740 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2741 myh->forced_local = 1;
2742
2743 free (tmp_name);
2744
2745 if (link_info->shared || globals->root.is_relocatable_executable
2746 || globals->pic_veneer)
2747 size = ARM2THUMB_PIC_GLUE_SIZE;
2748 else
2749 size = ARM2THUMB_STATIC_GLUE_SIZE;
2750
2751 s->size += size;
2752 globals->arm_glue_size += size;
2753
2754 return myh;
2755 }
2756
2757 static void
2758 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2759 struct elf_link_hash_entry *h)
2760 {
2761 const char *name = h->root.root.string;
2762 asection *s;
2763 char *tmp_name;
2764 struct elf_link_hash_entry *myh;
2765 struct bfd_link_hash_entry *bh;
2766 struct elf32_arm_link_hash_table *hash_table;
2767 bfd_vma val;
2768
2769 hash_table = elf32_arm_hash_table (link_info);
2770
2771 BFD_ASSERT (hash_table != NULL);
2772 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2773
2774 s = bfd_get_section_by_name
2775 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2776
2777 BFD_ASSERT (s != NULL);
2778
2779 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2780 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2781
2782 BFD_ASSERT (tmp_name);
2783
2784 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2785
2786 myh = elf_link_hash_lookup
2787 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2788
2789 if (myh != NULL)
2790 {
2791 /* We've already seen this guy. */
2792 free (tmp_name);
2793 return;
2794 }
2795
2796 bh = NULL;
2797 val = hash_table->thumb_glue_size + 1;
2798 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2799 tmp_name, BSF_GLOBAL, s, val,
2800 NULL, TRUE, FALSE, &bh);
2801
2802 /* If we mark it 'Thumb', the disassembler will do a better job. */
2803 myh = (struct elf_link_hash_entry *) bh;
2804 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2805 myh->forced_local = 1;
2806
2807 free (tmp_name);
2808
2809 #define CHANGE_TO_ARM "__%s_change_to_arm"
2810 #define BACK_FROM_ARM "__%s_back_from_arm"
2811
2812 /* Allocate another symbol to mark where we switch to Arm mode. */
2813 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2814 + strlen (CHANGE_TO_ARM) + 1);
2815
2816 BFD_ASSERT (tmp_name);
2817
2818 sprintf (tmp_name, CHANGE_TO_ARM, name);
2819
2820 bh = NULL;
2821 val = hash_table->thumb_glue_size + 4,
2822 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2823 tmp_name, BSF_LOCAL, s, val,
2824 NULL, TRUE, FALSE, &bh);
2825
2826 free (tmp_name);
2827
2828 s->size += THUMB2ARM_GLUE_SIZE;
2829 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2830
2831 return;
2832 }
2833
2834
2835 /* Add an entry to the code/data map for section SEC. */
2836
2837 static void
2838 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
2839 {
2840 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
2841 unsigned int newidx;
2842
2843 if (sec_data->map == NULL)
2844 {
2845 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
2846 sec_data->mapcount = 0;
2847 sec_data->mapsize = 1;
2848 }
2849
2850 newidx = sec_data->mapcount++;
2851
2852 if (sec_data->mapcount > sec_data->mapsize)
2853 {
2854 sec_data->mapsize *= 2;
2855 sec_data->map = bfd_realloc (sec_data->map, sec_data->mapsize
2856 * sizeof (elf32_arm_section_map));
2857 }
2858
2859 sec_data->map[newidx].vma = vma;
2860 sec_data->map[newidx].type = type;
2861 }
2862
2863
2864 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
2865 veneers are handled for now. */
2866
2867 static bfd_vma
2868 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
2869 elf32_vfp11_erratum_list *branch,
2870 bfd *branch_bfd,
2871 asection *branch_sec,
2872 unsigned int offset)
2873 {
2874 asection *s;
2875 struct elf32_arm_link_hash_table *hash_table;
2876 char *tmp_name;
2877 struct elf_link_hash_entry *myh;
2878 struct bfd_link_hash_entry *bh;
2879 bfd_vma val;
2880 struct _arm_elf_section_data *sec_data;
2881 int errcount;
2882 elf32_vfp11_erratum_list *newerr;
2883
2884 hash_table = elf32_arm_hash_table (link_info);
2885
2886 BFD_ASSERT (hash_table != NULL);
2887 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2888
2889 s = bfd_get_section_by_name
2890 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
2891
2892 sec_data = elf32_arm_section_data (s);
2893
2894 BFD_ASSERT (s != NULL);
2895
2896 tmp_name = bfd_malloc ((bfd_size_type) strlen
2897 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
2898
2899 BFD_ASSERT (tmp_name);
2900
2901 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
2902 hash_table->num_vfp11_fixes);
2903
2904 myh = elf_link_hash_lookup
2905 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
2906
2907 BFD_ASSERT (myh == NULL);
2908
2909 bh = NULL;
2910 val = hash_table->vfp11_erratum_glue_size;
2911 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2912 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
2913 NULL, TRUE, FALSE, &bh);
2914
2915 myh = (struct elf_link_hash_entry *) bh;
2916 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2917 myh->forced_local = 1;
2918
2919 /* Link veneer back to calling location. */
2920 errcount = ++(sec_data->erratumcount);
2921 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
2922
2923 newerr->type = VFP11_ERRATUM_ARM_VENEER;
2924 newerr->vma = -1;
2925 newerr->u.v.branch = branch;
2926 newerr->u.v.id = hash_table->num_vfp11_fixes;
2927 branch->u.b.veneer = newerr;
2928
2929 newerr->next = sec_data->erratumlist;
2930 sec_data->erratumlist = newerr;
2931
2932 /* A symbol for the return from the veneer. */
2933 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
2934 hash_table->num_vfp11_fixes);
2935
2936 myh = elf_link_hash_lookup
2937 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
2938
2939 if (myh != NULL)
2940 abort ();
2941
2942 bh = NULL;
2943 val = offset + 4;
2944 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
2945 branch_sec, val, NULL, TRUE, FALSE, &bh);
2946
2947 myh = (struct elf_link_hash_entry *) bh;
2948 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2949 myh->forced_local = 1;
2950
2951 free (tmp_name);
2952
2953 /* Generate a mapping symbol for the veneer section, and explicitly add an
2954 entry for that symbol to the code/data map for the section. */
2955 if (hash_table->vfp11_erratum_glue_size == 0)
2956 {
2957 bh = NULL;
2958 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
2959 ever requires this erratum fix. */
2960 _bfd_generic_link_add_one_symbol (link_info,
2961 hash_table->bfd_of_glue_owner, "$a",
2962 BSF_LOCAL, s, 0, NULL,
2963 TRUE, FALSE, &bh);
2964
2965 myh = (struct elf_link_hash_entry *) bh;
2966 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
2967 myh->forced_local = 1;
2968
2969 /* The elf32_arm_init_maps function only cares about symbols from input
2970 BFDs. We must make a note of this generated mapping symbol
2971 ourselves so that code byteswapping works properly in
2972 elf32_arm_write_section. */
2973 elf32_arm_section_map_add (s, 'a', 0);
2974 }
2975
2976 s->size += VFP11_ERRATUM_VENEER_SIZE;
2977 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
2978 hash_table->num_vfp11_fixes++;
2979
2980 /* The offset of the veneer. */
2981 return val;
2982 }
2983
2984 /* Add the glue sections to ABFD. This function is called from the
2985 linker scripts in ld/emultempl/{armelf}.em. */
2986
2987 bfd_boolean
2988 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
2989 struct bfd_link_info *info)
2990 {
2991 flagword flags;
2992 asection *sec;
2993
2994 /* If we are only performing a partial
2995 link do not bother adding the glue. */
2996 if (info->relocatable)
2997 return TRUE;
2998
2999 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
3000
3001 if (sec == NULL)
3002 {
3003 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
3004 will prevent elf_link_input_bfd() from processing the contents
3005 of this section. */
3006 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3007 | SEC_CODE | SEC_READONLY);
3008
3009 sec = bfd_make_section_with_flags (abfd,
3010 ARM2THUMB_GLUE_SECTION_NAME,
3011 flags);
3012
3013 if (sec == NULL
3014 || !bfd_set_section_alignment (abfd, sec, 2))
3015 return FALSE;
3016
3017 /* Set the gc mark to prevent the section from being removed by garbage
3018 collection, despite the fact that no relocs refer to this section. */
3019 sec->gc_mark = 1;
3020 }
3021
3022 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
3023
3024 if (sec == NULL)
3025 {
3026 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3027 | SEC_CODE | SEC_READONLY);
3028
3029 sec = bfd_make_section_with_flags (abfd,
3030 THUMB2ARM_GLUE_SECTION_NAME,
3031 flags);
3032
3033 if (sec == NULL
3034 || !bfd_set_section_alignment (abfd, sec, 2))
3035 return FALSE;
3036
3037 sec->gc_mark = 1;
3038 }
3039
3040 sec = bfd_get_section_by_name (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME);
3041
3042 if (sec == NULL)
3043 {
3044 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3045 | SEC_CODE | SEC_READONLY);
3046
3047 sec = bfd_make_section_with_flags (abfd,
3048 VFP11_ERRATUM_VENEER_SECTION_NAME,
3049 flags);
3050
3051 if (sec == NULL
3052 || !bfd_set_section_alignment (abfd, sec, 2))
3053 return FALSE;
3054
3055 sec->gc_mark = 1;
3056 }
3057
3058 return TRUE;
3059 }
3060
3061 /* Select a BFD to be used to hold the sections used by the glue code.
3062 This function is called from the linker scripts in ld/emultempl/
3063 {armelf/pe}.em */
3064
3065 bfd_boolean
3066 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
3067 {
3068 struct elf32_arm_link_hash_table *globals;
3069
3070 /* If we are only performing a partial link
3071 do not bother getting a bfd to hold the glue. */
3072 if (info->relocatable)
3073 return TRUE;
3074
3075 /* Make sure we don't attach the glue sections to a dynamic object. */
3076 BFD_ASSERT (!(abfd->flags & DYNAMIC));
3077
3078 globals = elf32_arm_hash_table (info);
3079
3080 BFD_ASSERT (globals != NULL);
3081
3082 if (globals->bfd_of_glue_owner != NULL)
3083 return TRUE;
3084
3085 /* Save the bfd for later use. */
3086 globals->bfd_of_glue_owner = abfd;
3087
3088 return TRUE;
3089 }
3090
3091 static void check_use_blx(struct elf32_arm_link_hash_table *globals)
3092 {
3093 if (elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch) > 2)
3094 globals->use_blx = 1;
3095 }
3096
3097 bfd_boolean
3098 bfd_elf32_arm_process_before_allocation (bfd *abfd,
3099 struct bfd_link_info *link_info)
3100 {
3101 Elf_Internal_Shdr *symtab_hdr;
3102 Elf_Internal_Rela *internal_relocs = NULL;
3103 Elf_Internal_Rela *irel, *irelend;
3104 bfd_byte *contents = NULL;
3105
3106 asection *sec;
3107 struct elf32_arm_link_hash_table *globals;
3108
3109 /* If we are only performing a partial link do not bother
3110 to construct any glue. */
3111 if (link_info->relocatable)
3112 return TRUE;
3113
3114 /* Here we have a bfd that is to be included on the link. We have a hook
3115 to do reloc rummaging, before section sizes are nailed down. */
3116 globals = elf32_arm_hash_table (link_info);
3117 check_use_blx (globals);
3118
3119 BFD_ASSERT (globals != NULL);
3120 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3121
3122 if (globals->byteswap_code && !bfd_big_endian (abfd))
3123 {
3124 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
3125 abfd);
3126 return FALSE;
3127 }
3128
3129 /* Rummage around all the relocs and map the glue vectors. */
3130 sec = abfd->sections;
3131
3132 if (sec == NULL)
3133 return TRUE;
3134
3135 for (; sec != NULL; sec = sec->next)
3136 {
3137 if (sec->reloc_count == 0)
3138 continue;
3139
3140 if ((sec->flags & SEC_EXCLUDE) != 0)
3141 continue;
3142
3143 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3144
3145 /* Load the relocs. */
3146 internal_relocs
3147 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
3148 (Elf_Internal_Rela *) NULL, FALSE);
3149
3150 if (internal_relocs == NULL)
3151 goto error_return;
3152
3153 irelend = internal_relocs + sec->reloc_count;
3154 for (irel = internal_relocs; irel < irelend; irel++)
3155 {
3156 long r_type;
3157 unsigned long r_index;
3158
3159 struct elf_link_hash_entry *h;
3160
3161 r_type = ELF32_R_TYPE (irel->r_info);
3162 r_index = ELF32_R_SYM (irel->r_info);
3163
3164 /* These are the only relocation types we care about. */
3165 if ( r_type != R_ARM_PC24
3166 && r_type != R_ARM_PLT32
3167 && r_type != R_ARM_CALL
3168 && r_type != R_ARM_JUMP24
3169 && r_type != R_ARM_THM_CALL)
3170 continue;
3171
3172 /* Get the section contents if we haven't done so already. */
3173 if (contents == NULL)
3174 {
3175 /* Get cached copy if it exists. */
3176 if (elf_section_data (sec)->this_hdr.contents != NULL)
3177 contents = elf_section_data (sec)->this_hdr.contents;
3178 else
3179 {
3180 /* Go get them off disk. */
3181 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3182 goto error_return;
3183 }
3184 }
3185
3186 /* If the relocation is not against a symbol it cannot concern us. */
3187 h = NULL;
3188
3189 /* We don't care about local symbols. */
3190 if (r_index < symtab_hdr->sh_info)
3191 continue;
3192
3193 /* This is an external symbol. */
3194 r_index -= symtab_hdr->sh_info;
3195 h = (struct elf_link_hash_entry *)
3196 elf_sym_hashes (abfd)[r_index];
3197
3198 /* If the relocation is against a static symbol it must be within
3199 the current section and so cannot be a cross ARM/Thumb relocation. */
3200 if (h == NULL)
3201 continue;
3202
3203 /* If the call will go through a PLT entry then we do not need
3204 glue. */
3205 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
3206 continue;
3207
3208 switch (r_type)
3209 {
3210 case R_ARM_PC24:
3211 case R_ARM_PLT32:
3212 case R_ARM_CALL:
3213 case R_ARM_JUMP24:
3214 /* This one is a call from arm code. We need to look up
3215 the target of the call. If it is a thumb target, we
3216 insert glue. */
3217 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
3218 && !(r_type == R_ARM_CALL && globals->use_blx))
3219 record_arm_to_thumb_glue (link_info, h);
3220 break;
3221
3222 case R_ARM_THM_CALL:
3223 /* This one is a call from thumb code. We look
3224 up the target of the call. If it is not a thumb
3225 target, we insert glue. */
3226 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC && !globals->use_blx)
3227 record_thumb_to_arm_glue (link_info, h);
3228 break;
3229
3230 default:
3231 abort ();
3232 }
3233 }
3234
3235 if (contents != NULL
3236 && elf_section_data (sec)->this_hdr.contents != contents)
3237 free (contents);
3238 contents = NULL;
3239
3240 if (internal_relocs != NULL
3241 && elf_section_data (sec)->relocs != internal_relocs)
3242 free (internal_relocs);
3243 internal_relocs = NULL;
3244 }
3245
3246 return TRUE;
3247
3248 error_return:
3249 if (contents != NULL
3250 && elf_section_data (sec)->this_hdr.contents != contents)
3251 free (contents);
3252 if (internal_relocs != NULL
3253 && elf_section_data (sec)->relocs != internal_relocs)
3254 free (internal_relocs);
3255
3256 return FALSE;
3257 }
3258 #endif
3259
3260
3261 /* Initialise maps of ARM/Thumb/data for input BFDs. */
3262
3263 void
3264 bfd_elf32_arm_init_maps (bfd *abfd)
3265 {
3266 Elf_Internal_Sym *isymbuf;
3267 Elf_Internal_Shdr *hdr;
3268 unsigned int i, localsyms;
3269
3270 if ((abfd->flags & DYNAMIC) != 0)
3271 return;
3272
3273 hdr = &elf_tdata (abfd)->symtab_hdr;
3274 localsyms = hdr->sh_info;
3275
3276 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3277 should contain the number of local symbols, which should come before any
3278 global symbols. Mapping symbols are always local. */
3279 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
3280 NULL);
3281
3282 /* No internal symbols read? Skip this BFD. */
3283 if (isymbuf == NULL)
3284 return;
3285
3286 for (i = 0; i < localsyms; i++)
3287 {
3288 Elf_Internal_Sym *isym = &isymbuf[i];
3289 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3290 const char *name;
3291
3292 if (sec != NULL
3293 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3294 {
3295 name = bfd_elf_string_from_elf_section (abfd,
3296 hdr->sh_link, isym->st_name);
3297
3298 if (bfd_is_arm_special_symbol_name (name,
3299 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
3300 elf32_arm_section_map_add (sec, name[1], isym->st_value);
3301 }
3302 }
3303 }
3304
3305
3306 void
3307 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
3308 {
3309 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3310 aeabi_attribute *out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
3311
3312 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
3313 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
3314 {
3315 switch (globals->vfp11_fix)
3316 {
3317 case BFD_ARM_VFP11_FIX_DEFAULT:
3318 case BFD_ARM_VFP11_FIX_NONE:
3319 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3320 break;
3321
3322 default:
3323 /* Give a warning, but do as the user requests anyway. */
3324 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
3325 "workaround is not necessary for target architecture"), obfd);
3326 }
3327 }
3328 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
3329 /* For earlier architectures, we might need the workaround, but do not
3330 enable it by default. If users is running with broken hardware, they
3331 must enable the erratum fix explicitly. */
3332 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3333 }
3334
3335
3336 enum bfd_arm_vfp11_pipe {
3337 VFP11_FMAC,
3338 VFP11_LS,
3339 VFP11_DS,
3340 VFP11_BAD
3341 };
3342
3343 /* Return a VFP register number. This is encoded as RX:X for single-precision
3344 registers, or X:RX for double-precision registers, where RX is the group of
3345 four bits in the instruction encoding and X is the single extension bit.
3346 RX and X fields are specified using their lowest (starting) bit. The return
3347 value is:
3348
3349 0...31: single-precision registers s0...s31
3350 32...63: double-precision registers d0...d31.
3351
3352 Although X should be zero for VFP11 (encoding d0...d15 only), we might
3353 encounter VFP3 instructions, so we allow the full range for DP registers. */
3354
3355 static unsigned int
3356 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
3357 unsigned int x)
3358 {
3359 if (is_double)
3360 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
3361 else
3362 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
3363 }
3364
3365 /* Set bits in *WMASK according to a register number REG as encoded by
3366 bfd_arm_vfp11_regno(). Ignore d16-d31. */
3367
3368 static void
3369 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
3370 {
3371 if (reg < 32)
3372 *wmask |= 1 << reg;
3373 else if (reg < 48)
3374 *wmask |= 3 << ((reg - 32) * 2);
3375 }
3376
3377 /* Return TRUE if WMASK overwrites anything in REGS. */
3378
3379 static bfd_boolean
3380 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
3381 {
3382 int i;
3383
3384 for (i = 0; i < numregs; i++)
3385 {
3386 unsigned int reg = regs[i];
3387
3388 if (reg < 32 && (wmask & (1 << reg)) != 0)
3389 return TRUE;
3390
3391 reg -= 32;
3392
3393 if (reg >= 16)
3394 continue;
3395
3396 if ((wmask & (3 << (reg * 2))) != 0)
3397 return TRUE;
3398 }
3399
3400 return FALSE;
3401 }
3402
3403 /* In this function, we're interested in two things: finding input registers
3404 for VFP data-processing instructions, and finding the set of registers which
3405 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
3406 hold the written set, so FLDM etc. are easy to deal with (we're only
3407 interested in 32 SP registers or 16 dp registers, due to the VFP version
3408 implemented by the chip in question). DP registers are marked by setting
3409 both SP registers in the write mask). */
3410
3411 static enum bfd_arm_vfp11_pipe
3412 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
3413 int *numregs)
3414 {
3415 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
3416 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
3417
3418 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
3419 {
3420 unsigned int pqrs;
3421 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3422 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3423
3424 pqrs = ((insn & 0x00800000) >> 20)
3425 | ((insn & 0x00300000) >> 19)
3426 | ((insn & 0x00000040) >> 6);
3427
3428 switch (pqrs)
3429 {
3430 case 0: /* fmac[sd]. */
3431 case 1: /* fnmac[sd]. */
3432 case 2: /* fmsc[sd]. */
3433 case 3: /* fnmsc[sd]. */
3434 pipe = VFP11_FMAC;
3435 bfd_arm_vfp11_write_mask (destmask, fd);
3436 regs[0] = fd;
3437 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3438 regs[2] = fm;
3439 *numregs = 3;
3440 break;
3441
3442 case 4: /* fmul[sd]. */
3443 case 5: /* fnmul[sd]. */
3444 case 6: /* fadd[sd]. */
3445 case 7: /* fsub[sd]. */
3446 pipe = VFP11_FMAC;
3447 goto vfp_binop;
3448
3449 case 8: /* fdiv[sd]. */
3450 pipe = VFP11_DS;
3451 vfp_binop:
3452 bfd_arm_vfp11_write_mask (destmask, fd);
3453 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3454 regs[1] = fm;
3455 *numregs = 2;
3456 break;
3457
3458 case 15: /* extended opcode. */
3459 {
3460 unsigned int extn = ((insn >> 15) & 0x1e)
3461 | ((insn >> 7) & 1);
3462
3463 switch (extn)
3464 {
3465 case 0: /* fcpy[sd]. */
3466 case 1: /* fabs[sd]. */
3467 case 2: /* fneg[sd]. */
3468 case 8: /* fcmp[sd]. */
3469 case 9: /* fcmpe[sd]. */
3470 case 10: /* fcmpz[sd]. */
3471 case 11: /* fcmpez[sd]. */
3472 case 16: /* fuito[sd]. */
3473 case 17: /* fsito[sd]. */
3474 case 24: /* ftoui[sd]. */
3475 case 25: /* ftouiz[sd]. */
3476 case 26: /* ftosi[sd]. */
3477 case 27: /* ftosiz[sd]. */
3478 /* These instructions will not bounce due to underflow. */
3479 *numregs = 0;
3480 pipe = VFP11_FMAC;
3481 break;
3482
3483 case 3: /* fsqrt[sd]. */
3484 /* fsqrt cannot underflow, but it can (perhaps) overwrite
3485 registers to cause the erratum in previous instructions. */
3486 bfd_arm_vfp11_write_mask (destmask, fd);
3487 pipe = VFP11_DS;
3488 break;
3489
3490 case 15: /* fcvt{ds,sd}. */
3491 {
3492 int rnum = 0;
3493
3494 bfd_arm_vfp11_write_mask (destmask, fd);
3495
3496 /* Only FCVTSD can underflow. */
3497 if ((insn & 0x100) != 0)
3498 regs[rnum++] = fm;
3499
3500 *numregs = rnum;
3501
3502 pipe = VFP11_FMAC;
3503 }
3504 break;
3505
3506 default:
3507 return VFP11_BAD;
3508 }
3509 }
3510 break;
3511
3512 default:
3513 return VFP11_BAD;
3514 }
3515 }
3516 /* Two-register transfer. */
3517 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
3518 {
3519 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3520
3521 if ((insn & 0x100000) == 0)
3522 {
3523 if (is_double)
3524 bfd_arm_vfp11_write_mask (destmask, fm);
3525 else
3526 {
3527 bfd_arm_vfp11_write_mask (destmask, fm);
3528 bfd_arm_vfp11_write_mask (destmask, fm + 1);
3529 }
3530 }
3531
3532 pipe = VFP11_LS;
3533 }
3534 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
3535 {
3536 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3537 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
3538
3539 switch (puw)
3540 {
3541 case 0: /* Two-reg transfer. We should catch these above. */
3542 abort ();
3543
3544 case 2: /* fldm[sdx]. */
3545 case 3:
3546 case 5:
3547 {
3548 unsigned int i, offset = insn & 0xff;
3549
3550 if (is_double)
3551 offset >>= 1;
3552
3553 for (i = fd; i < fd + offset; i++)
3554 bfd_arm_vfp11_write_mask (destmask, i);
3555 }
3556 break;
3557
3558 case 4: /* fld[sd]. */
3559 case 6:
3560 bfd_arm_vfp11_write_mask (destmask, fd);
3561 break;
3562
3563 default:
3564 return VFP11_BAD;
3565 }
3566
3567 pipe = VFP11_LS;
3568 }
3569 /* Single-register transfer. Note L==0. */
3570 else if ((insn & 0x0f100e10) == 0x0e000a10)
3571 {
3572 unsigned int opcode = (insn >> 21) & 7;
3573 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
3574
3575 switch (opcode)
3576 {
3577 case 0: /* fmsr/fmdlr. */
3578 case 1: /* fmdhr. */
3579 /* Mark fmdhr and fmdlr as writing to the whole of the DP
3580 destination register. I don't know if this is exactly right,
3581 but it is the conservative choice. */
3582 bfd_arm_vfp11_write_mask (destmask, fn);
3583 break;
3584
3585 case 7: /* fmxr. */
3586 break;
3587 }
3588
3589 pipe = VFP11_LS;
3590 }
3591
3592 return pipe;
3593 }
3594
3595
3596 static int elf32_arm_compare_mapping (const void * a, const void * b);
3597
3598
3599 /* Look for potentially-troublesome code sequences which might trigger the
3600 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
3601 (available from ARM) for details of the erratum. A short version is
3602 described in ld.texinfo. */
3603
3604 bfd_boolean
3605 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
3606 {
3607 asection *sec;
3608 bfd_byte *contents = NULL;
3609 int state = 0;
3610 int regs[3], numregs = 0;
3611 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3612 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
3613
3614 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
3615 The states transition as follows:
3616
3617 0 -> 1 (vector) or 0 -> 2 (scalar)
3618 A VFP FMAC-pipeline instruction has been seen. Fill
3619 regs[0]..regs[numregs-1] with its input operands. Remember this
3620 instruction in 'first_fmac'.
3621
3622 1 -> 2
3623 Any instruction, except for a VFP instruction which overwrites
3624 regs[*].
3625
3626 1 -> 3 [ -> 0 ] or
3627 2 -> 3 [ -> 0 ]
3628 A VFP instruction has been seen which overwrites any of regs[*].
3629 We must make a veneer! Reset state to 0 before examining next
3630 instruction.
3631
3632 2 -> 0
3633 If we fail to match anything in state 2, reset to state 0 and reset
3634 the instruction pointer to the instruction after 'first_fmac'.
3635
3636 If the VFP11 vector mode is in use, there must be at least two unrelated
3637 instructions between anti-dependent VFP11 instructions to properly avoid
3638 triggering the erratum, hence the use of the extra state 1.
3639 */
3640
3641 /* If we are only performing a partial link do not bother
3642 to construct any glue. */
3643 if (link_info->relocatable)
3644 return TRUE;
3645
3646 /* We should have chosen a fix type by the time we get here. */
3647 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
3648
3649 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
3650 return TRUE;
3651
3652 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3653 {
3654 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
3655 struct _arm_elf_section_data *sec_data;
3656
3657 /* If we don't have executable progbits, we're not interested in this
3658 section. Also skip if section is to be excluded. */
3659 if (elf_section_type (sec) != SHT_PROGBITS
3660 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
3661 || (sec->flags & SEC_EXCLUDE) != 0
3662 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
3663 continue;
3664
3665 sec_data = elf32_arm_section_data (sec);
3666
3667 if (sec_data->mapcount == 0)
3668 continue;
3669
3670 if (elf_section_data (sec)->this_hdr.contents != NULL)
3671 contents = elf_section_data (sec)->this_hdr.contents;
3672 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3673 goto error_return;
3674
3675 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
3676 elf32_arm_compare_mapping);
3677
3678 for (span = 0; span < sec_data->mapcount; span++)
3679 {
3680 unsigned int span_start = sec_data->map[span].vma;
3681 unsigned int span_end = (span == sec_data->mapcount - 1)
3682 ? sec->size : sec_data->map[span + 1].vma;
3683 char span_type = sec_data->map[span].type;
3684
3685 /* FIXME: Only ARM mode is supported at present. We may need to
3686 support Thumb-2 mode also at some point. */
3687 if (span_type != 'a')
3688 continue;
3689
3690 for (i = span_start; i < span_end;)
3691 {
3692 unsigned int next_i = i + 4;
3693 unsigned int insn = bfd_big_endian (abfd)
3694 ? (contents[i] << 24)
3695 | (contents[i + 1] << 16)
3696 | (contents[i + 2] << 8)
3697 | contents[i + 3]
3698 : (contents[i + 3] << 24)
3699 | (contents[i + 2] << 16)
3700 | (contents[i + 1] << 8)
3701 | contents[i];
3702 unsigned int writemask = 0;
3703 enum bfd_arm_vfp11_pipe pipe;
3704
3705 switch (state)
3706 {
3707 case 0:
3708 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
3709 &numregs);
3710 /* I'm assuming the VFP11 erratum can trigger with denorm
3711 operands on either the FMAC or the DS pipeline. This might
3712 lead to slightly overenthusiastic veneer insertion. */
3713 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
3714 {
3715 state = use_vector ? 1 : 2;
3716 first_fmac = i;
3717 veneer_of_insn = insn;
3718 }
3719 break;
3720
3721 case 1:
3722 {
3723 int other_regs[3], other_numregs;
3724 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3725 other_regs,
3726 &other_numregs);
3727 if (pipe != VFP11_BAD
3728 && bfd_arm_vfp11_antidependency (writemask, regs,
3729 numregs))
3730 state = 3;
3731 else
3732 state = 2;
3733 }
3734 break;
3735
3736 case 2:
3737 {
3738 int other_regs[3], other_numregs;
3739 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3740 other_regs,
3741 &other_numregs);
3742 if (pipe != VFP11_BAD
3743 && bfd_arm_vfp11_antidependency (writemask, regs,
3744 numregs))
3745 state = 3;
3746 else
3747 {
3748 state = 0;
3749 next_i = first_fmac + 4;
3750 }
3751 }
3752 break;
3753
3754 case 3:
3755 abort (); /* Should be unreachable. */
3756 }
3757
3758 if (state == 3)
3759 {
3760 elf32_vfp11_erratum_list *newerr
3761 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
3762 int errcount;
3763
3764 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
3765
3766 newerr->u.b.vfp_insn = veneer_of_insn;
3767
3768 switch (span_type)
3769 {
3770 case 'a':
3771 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
3772 break;
3773
3774 default:
3775 abort ();
3776 }
3777
3778 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
3779 first_fmac);
3780
3781 newerr->vma = -1;
3782
3783 newerr->next = sec_data->erratumlist;
3784 sec_data->erratumlist = newerr;
3785
3786 state = 0;
3787 }
3788
3789 i = next_i;
3790 }
3791 }
3792
3793 if (contents != NULL
3794 && elf_section_data (sec)->this_hdr.contents != contents)
3795 free (contents);
3796 contents = NULL;
3797 }
3798
3799 return TRUE;
3800
3801 error_return:
3802 if (contents != NULL
3803 && elf_section_data (sec)->this_hdr.contents != contents)
3804 free (contents);
3805
3806 return FALSE;
3807 }
3808
3809 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
3810 after sections have been laid out, using specially-named symbols. */
3811
3812 void
3813 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
3814 struct bfd_link_info *link_info)
3815 {
3816 asection *sec;
3817 struct elf32_arm_link_hash_table *globals;
3818 char *tmp_name;
3819
3820 if (link_info->relocatable)
3821 return;
3822
3823 globals = elf32_arm_hash_table (link_info);
3824
3825 tmp_name = bfd_malloc ((bfd_size_type) strlen
3826 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
3827
3828 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3829 {
3830 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
3831 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
3832
3833 for (; errnode != NULL; errnode = errnode->next)
3834 {
3835 struct elf_link_hash_entry *myh;
3836 bfd_vma vma;
3837
3838 switch (errnode->type)
3839 {
3840 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
3841 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
3842 /* Find veneer symbol. */
3843 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
3844 errnode->u.b.veneer->u.v.id);
3845
3846 myh = elf_link_hash_lookup
3847 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
3848
3849 if (myh == NULL)
3850 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
3851 "`%s'"), abfd, tmp_name);
3852
3853 vma = myh->root.u.def.section->output_section->vma
3854 + myh->root.u.def.section->output_offset
3855 + myh->root.u.def.value;
3856
3857 errnode->u.b.veneer->vma = vma;
3858 break;
3859
3860 case VFP11_ERRATUM_ARM_VENEER:
3861 case VFP11_ERRATUM_THUMB_VENEER:
3862 /* Find return location. */
3863 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
3864 errnode->u.v.id);
3865
3866 myh = elf_link_hash_lookup
3867 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
3868
3869 if (myh == NULL)
3870 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
3871 "`%s'"), abfd, tmp_name);
3872
3873 vma = myh->root.u.def.section->output_section->vma
3874 + myh->root.u.def.section->output_offset
3875 + myh->root.u.def.value;
3876
3877 errnode->u.v.branch->vma = vma;
3878 break;
3879
3880 default:
3881 abort ();
3882 }
3883 }
3884 }
3885
3886 free (tmp_name);
3887 }
3888
3889
3890 /* Set target relocation values needed during linking. */
3891
3892 void
3893 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
3894 struct bfd_link_info *link_info,
3895 int target1_is_rel,
3896 char * target2_type,
3897 int fix_v4bx,
3898 int use_blx,
3899 bfd_arm_vfp11_fix vfp11_fix,
3900 int no_enum_warn, int pic_veneer)
3901 {
3902 struct elf32_arm_link_hash_table *globals;
3903
3904 globals = elf32_arm_hash_table (link_info);
3905
3906 globals->target1_is_rel = target1_is_rel;
3907 if (strcmp (target2_type, "rel") == 0)
3908 globals->target2_reloc = R_ARM_REL32;
3909 else if (strcmp (target2_type, "abs") == 0)
3910 globals->target2_reloc = R_ARM_ABS32;
3911 else if (strcmp (target2_type, "got-rel") == 0)
3912 globals->target2_reloc = R_ARM_GOT_PREL;
3913 else
3914 {
3915 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
3916 target2_type);
3917 }
3918 globals->fix_v4bx = fix_v4bx;
3919 globals->use_blx |= use_blx;
3920 globals->vfp11_fix = vfp11_fix;
3921 globals->pic_veneer = pic_veneer;
3922
3923 elf32_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3924 }
3925
3926 /* The thumb form of a long branch is a bit finicky, because the offset
3927 encoding is split over two fields, each in it's own instruction. They
3928 can occur in any order. So given a thumb form of long branch, and an
3929 offset, insert the offset into the thumb branch and return finished
3930 instruction.
3931
3932 It takes two thumb instructions to encode the target address. Each has
3933 11 bits to invest. The upper 11 bits are stored in one (identified by
3934 H-0.. see below), the lower 11 bits are stored in the other (identified
3935 by H-1).
3936
3937 Combine together and shifted left by 1 (it's a half word address) and
3938 there you have it.
3939
3940 Op: 1111 = F,
3941 H-0, upper address-0 = 000
3942 Op: 1111 = F,
3943 H-1, lower address-0 = 800
3944
3945 They can be ordered either way, but the arm tools I've seen always put
3946 the lower one first. It probably doesn't matter. krk@cygnus.com
3947
3948 XXX: Actually the order does matter. The second instruction (H-1)
3949 moves the computed address into the PC, so it must be the second one
3950 in the sequence. The problem, however is that whilst little endian code
3951 stores the instructions in HI then LOW order, big endian code does the
3952 reverse. nickc@cygnus.com. */
3953
3954 #define LOW_HI_ORDER 0xF800F000
3955 #define HI_LOW_ORDER 0xF000F800
3956
3957 static insn32
3958 insert_thumb_branch (insn32 br_insn, int rel_off)
3959 {
3960 unsigned int low_bits;
3961 unsigned int high_bits;
3962
3963 BFD_ASSERT ((rel_off & 1) != 1);
3964
3965 rel_off >>= 1; /* Half word aligned address. */
3966 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
3967 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
3968
3969 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
3970 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
3971 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
3972 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
3973 else
3974 /* FIXME: abort is probably not the right call. krk@cygnus.com */
3975 abort (); /* Error - not a valid branch instruction form. */
3976
3977 return br_insn;
3978 }
3979
3980
3981 /* Store an Arm insn into an output section not processed by
3982 elf32_arm_write_section. */
3983
3984 static void
3985 put_arm_insn (struct elf32_arm_link_hash_table *htab,
3986 bfd * output_bfd, bfd_vma val, void * ptr)
3987 {
3988 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3989 bfd_putl32 (val, ptr);
3990 else
3991 bfd_putb32 (val, ptr);
3992 }
3993
3994
3995 /* Store a 16-bit Thumb insn into an output section not processed by
3996 elf32_arm_write_section. */
3997
3998 static void
3999 put_thumb_insn (struct elf32_arm_link_hash_table *htab,
4000 bfd * output_bfd, bfd_vma val, void * ptr)
4001 {
4002 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4003 bfd_putl16 (val, ptr);
4004 else
4005 bfd_putb16 (val, ptr);
4006 }
4007
4008
4009 /* Thumb code calling an ARM function. */
4010
4011 static int
4012 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
4013 const char * name,
4014 bfd * input_bfd,
4015 bfd * output_bfd,
4016 asection * input_section,
4017 bfd_byte * hit_data,
4018 asection * sym_sec,
4019 bfd_vma offset,
4020 bfd_signed_vma addend,
4021 bfd_vma val,
4022 char **error_message)
4023 {
4024 asection * s = 0;
4025 bfd_vma my_offset;
4026 unsigned long int tmp;
4027 long int ret_offset;
4028 struct elf_link_hash_entry * myh;
4029 struct elf32_arm_link_hash_table * globals;
4030
4031 myh = find_thumb_glue (info, name, error_message);
4032 if (myh == NULL)
4033 return FALSE;
4034
4035 globals = elf32_arm_hash_table (info);
4036
4037 BFD_ASSERT (globals != NULL);
4038 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4039
4040 my_offset = myh->root.u.def.value;
4041
4042 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4043 THUMB2ARM_GLUE_SECTION_NAME);
4044
4045 BFD_ASSERT (s != NULL);
4046 BFD_ASSERT (s->contents != NULL);
4047 BFD_ASSERT (s->output_section != NULL);
4048
4049 if ((my_offset & 0x01) == 0x01)
4050 {
4051 if (sym_sec != NULL
4052 && sym_sec->owner != NULL
4053 && !INTERWORK_FLAG (sym_sec->owner))
4054 {
4055 (*_bfd_error_handler)
4056 (_("%B(%s): warning: interworking not enabled.\n"
4057 " first occurrence: %B: thumb call to arm"),
4058 sym_sec->owner, input_bfd, name);
4059
4060 return FALSE;
4061 }
4062
4063 --my_offset;
4064 myh->root.u.def.value = my_offset;
4065
4066 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
4067 s->contents + my_offset);
4068
4069 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
4070 s->contents + my_offset + 2);
4071
4072 ret_offset =
4073 /* Address of destination of the stub. */
4074 ((bfd_signed_vma) val)
4075 - ((bfd_signed_vma)
4076 /* Offset from the start of the current section
4077 to the start of the stubs. */
4078 (s->output_offset
4079 /* Offset of the start of this stub from the start of the stubs. */
4080 + my_offset
4081 /* Address of the start of the current section. */
4082 + s->output_section->vma)
4083 /* The branch instruction is 4 bytes into the stub. */
4084 + 4
4085 /* ARM branches work from the pc of the instruction + 8. */
4086 + 8);
4087
4088 put_arm_insn (globals, output_bfd,
4089 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
4090 s->contents + my_offset + 4);
4091 }
4092
4093 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
4094
4095 /* Now go back and fix up the original BL insn to point to here. */
4096 ret_offset =
4097 /* Address of where the stub is located. */
4098 (s->output_section->vma + s->output_offset + my_offset)
4099 /* Address of where the BL is located. */
4100 - (input_section->output_section->vma + input_section->output_offset
4101 + offset)
4102 /* Addend in the relocation. */
4103 - addend
4104 /* Biassing for PC-relative addressing. */
4105 - 8;
4106
4107 tmp = bfd_get_32 (input_bfd, hit_data
4108 - input_section->vma);
4109
4110 bfd_put_32 (output_bfd,
4111 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
4112 hit_data - input_section->vma);
4113
4114 return TRUE;
4115 }
4116
4117 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
4118
4119 static struct elf_link_hash_entry *
4120 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
4121 const char * name,
4122 bfd * input_bfd,
4123 bfd * output_bfd,
4124 asection * sym_sec,
4125 bfd_vma val,
4126 asection *s,
4127 char **error_message)
4128 {
4129 bfd_vma my_offset;
4130 long int ret_offset;
4131 struct elf_link_hash_entry * myh;
4132 struct elf32_arm_link_hash_table * globals;
4133
4134 myh = find_arm_glue (info, name, error_message);
4135 if (myh == NULL)
4136 return NULL;
4137
4138 globals = elf32_arm_hash_table (info);
4139
4140 BFD_ASSERT (globals != NULL);
4141 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4142
4143 my_offset = myh->root.u.def.value;
4144
4145 if ((my_offset & 0x01) == 0x01)
4146 {
4147 if (sym_sec != NULL
4148 && sym_sec->owner != NULL
4149 && !INTERWORK_FLAG (sym_sec->owner))
4150 {
4151 (*_bfd_error_handler)
4152 (_("%B(%s): warning: interworking not enabled.\n"
4153 " first occurrence: %B: arm call to thumb"),
4154 sym_sec->owner, input_bfd, name);
4155 }
4156
4157 --my_offset;
4158 myh->root.u.def.value = my_offset;
4159
4160 if (info->shared || globals->root.is_relocatable_executable
4161 || globals->pic_veneer)
4162 {
4163 /* For relocatable objects we can't use absolute addresses,
4164 so construct the address from a relative offset. */
4165 /* TODO: If the offset is small it's probably worth
4166 constructing the address with adds. */
4167 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
4168 s->contents + my_offset);
4169 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
4170 s->contents + my_offset + 4);
4171 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
4172 s->contents + my_offset + 8);
4173 /* Adjust the offset by 4 for the position of the add,
4174 and 8 for the pipeline offset. */
4175 ret_offset = (val - (s->output_offset
4176 + s->output_section->vma
4177 + my_offset + 12))
4178 | 1;
4179 bfd_put_32 (output_bfd, ret_offset,
4180 s->contents + my_offset + 12);
4181 }
4182 else
4183 {
4184 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
4185 s->contents + my_offset);
4186
4187 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
4188 s->contents + my_offset + 4);
4189
4190 /* It's a thumb address. Add the low order bit. */
4191 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
4192 s->contents + my_offset + 8);
4193 }
4194 }
4195
4196 BFD_ASSERT (my_offset <= globals->arm_glue_size);
4197
4198 return myh;
4199 }
4200
4201 /* Arm code calling a Thumb function. */
4202
4203 static int
4204 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
4205 const char * name,
4206 bfd * input_bfd,
4207 bfd * output_bfd,
4208 asection * input_section,
4209 bfd_byte * hit_data,
4210 asection * sym_sec,
4211 bfd_vma offset,
4212 bfd_signed_vma addend,
4213 bfd_vma val,
4214 char **error_message)
4215 {
4216 unsigned long int tmp;
4217 bfd_vma my_offset;
4218 asection * s;
4219 long int ret_offset;
4220 struct elf_link_hash_entry * myh;
4221 struct elf32_arm_link_hash_table * globals;
4222
4223 globals = elf32_arm_hash_table (info);
4224
4225 BFD_ASSERT (globals != NULL);
4226 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4227
4228 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4229 ARM2THUMB_GLUE_SECTION_NAME);
4230 BFD_ASSERT (s != NULL);
4231 BFD_ASSERT (s->contents != NULL);
4232 BFD_ASSERT (s->output_section != NULL);
4233
4234 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
4235 sym_sec, val, s, error_message);
4236 if (!myh)
4237 return FALSE;
4238
4239 my_offset = myh->root.u.def.value;
4240 tmp = bfd_get_32 (input_bfd, hit_data);
4241 tmp = tmp & 0xFF000000;
4242
4243 /* Somehow these are both 4 too far, so subtract 8. */
4244 ret_offset = (s->output_offset
4245 + my_offset
4246 + s->output_section->vma
4247 - (input_section->output_offset
4248 + input_section->output_section->vma
4249 + offset + addend)
4250 - 8);
4251
4252 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
4253
4254 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
4255
4256 return TRUE;
4257 }
4258
4259 /* Populate Arm stub for an exported Thumb function. */
4260
4261 static bfd_boolean
4262 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
4263 {
4264 struct bfd_link_info * info = (struct bfd_link_info *) inf;
4265 asection * s;
4266 struct elf_link_hash_entry * myh;
4267 struct elf32_arm_link_hash_entry *eh;
4268 struct elf32_arm_link_hash_table * globals;
4269 asection *sec;
4270 bfd_vma val;
4271 char *error_message;
4272
4273 eh = elf32_arm_hash_entry(h);
4274 /* Allocate stubs for exported Thumb functions on v4t. */
4275 if (eh->export_glue == NULL)
4276 return TRUE;
4277
4278 globals = elf32_arm_hash_table (info);
4279
4280 BFD_ASSERT (globals != NULL);
4281 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4282
4283 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4284 ARM2THUMB_GLUE_SECTION_NAME);
4285 BFD_ASSERT (s != NULL);
4286 BFD_ASSERT (s->contents != NULL);
4287 BFD_ASSERT (s->output_section != NULL);
4288
4289 sec = eh->export_glue->root.u.def.section;
4290
4291 BFD_ASSERT (sec->output_section != NULL);
4292
4293 val = eh->export_glue->root.u.def.value + sec->output_offset
4294 + sec->output_section->vma;
4295 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
4296 h->root.u.def.section->owner,
4297 globals->obfd, sec, val, s,
4298 &error_message);
4299 BFD_ASSERT (myh);
4300 return TRUE;
4301 }
4302
4303 /* Generate Arm stubs for exported Thumb symbols. */
4304 static void
4305 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
4306 struct bfd_link_info *link_info)
4307 {
4308 struct elf32_arm_link_hash_table * globals;
4309
4310 if (!link_info)
4311 return;
4312
4313 globals = elf32_arm_hash_table (link_info);
4314 /* If blx is available then exported Thumb symbols are OK and there is
4315 nothing to do. */
4316 if (globals->use_blx)
4317 return;
4318
4319 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
4320 link_info);
4321 }
4322
4323 /* Some relocations map to different relocations depending on the
4324 target. Return the real relocation. */
4325 static int
4326 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
4327 int r_type)
4328 {
4329 switch (r_type)
4330 {
4331 case R_ARM_TARGET1:
4332 if (globals->target1_is_rel)
4333 return R_ARM_REL32;
4334 else
4335 return R_ARM_ABS32;
4336
4337 case R_ARM_TARGET2:
4338 return globals->target2_reloc;
4339
4340 default:
4341 return r_type;
4342 }
4343 }
4344
4345 /* Return the base VMA address which should be subtracted from real addresses
4346 when resolving @dtpoff relocation.
4347 This is PT_TLS segment p_vaddr. */
4348
4349 static bfd_vma
4350 dtpoff_base (struct bfd_link_info *info)
4351 {
4352 /* If tls_sec is NULL, we should have signalled an error already. */
4353 if (elf_hash_table (info)->tls_sec == NULL)
4354 return 0;
4355 return elf_hash_table (info)->tls_sec->vma;
4356 }
4357
4358 /* Return the relocation value for @tpoff relocation
4359 if STT_TLS virtual address is ADDRESS. */
4360
4361 static bfd_vma
4362 tpoff (struct bfd_link_info *info, bfd_vma address)
4363 {
4364 struct elf_link_hash_table *htab = elf_hash_table (info);
4365 bfd_vma base;
4366
4367 /* If tls_sec is NULL, we should have signalled an error already. */
4368 if (htab->tls_sec == NULL)
4369 return 0;
4370 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
4371 return address - htab->tls_sec->vma + base;
4372 }
4373
4374 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
4375 VALUE is the relocation value. */
4376
4377 static bfd_reloc_status_type
4378 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
4379 {
4380 if (value > 0xfff)
4381 return bfd_reloc_overflow;
4382
4383 value |= bfd_get_32 (abfd, data) & 0xfffff000;
4384 bfd_put_32 (abfd, value, data);
4385 return bfd_reloc_ok;
4386 }
4387
4388 /* For a given value of n, calculate the value of G_n as required to
4389 deal with group relocations. We return it in the form of an
4390 encoded constant-and-rotation, together with the final residual. If n is
4391 specified as less than zero, then final_residual is filled with the
4392 input value and no further action is performed. */
4393
4394 static bfd_vma
4395 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
4396 {
4397 int current_n;
4398 bfd_vma g_n;
4399 bfd_vma encoded_g_n = 0;
4400 bfd_vma residual = value; /* Also known as Y_n. */
4401
4402 for (current_n = 0; current_n <= n; current_n++)
4403 {
4404 int shift;
4405
4406 /* Calculate which part of the value to mask. */
4407 if (residual == 0)
4408 shift = 0;
4409 else
4410 {
4411 int msb;
4412
4413 /* Determine the most significant bit in the residual and
4414 align the resulting value to a 2-bit boundary. */
4415 for (msb = 30; msb >= 0; msb -= 2)
4416 if (residual & (3 << msb))
4417 break;
4418
4419 /* The desired shift is now (msb - 6), or zero, whichever
4420 is the greater. */
4421 shift = msb - 6;
4422 if (shift < 0)
4423 shift = 0;
4424 }
4425
4426 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
4427 g_n = residual & (0xff << shift);
4428 encoded_g_n = (g_n >> shift)
4429 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
4430
4431 /* Calculate the residual for the next time around. */
4432 residual &= ~g_n;
4433 }
4434
4435 *final_residual = residual;
4436
4437 return encoded_g_n;
4438 }
4439
4440 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
4441 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
4442 static int
4443 identify_add_or_sub(bfd_vma insn)
4444 {
4445 int opcode = insn & 0x1e00000;
4446
4447 if (opcode == 1 << 23) /* ADD */
4448 return 1;
4449
4450 if (opcode == 1 << 22) /* SUB */
4451 return -1;
4452
4453 return 0;
4454 }
4455
4456 /* Determine if we're dealing with a Thumb-2 object. */
4457
4458 static int using_thumb2 (struct elf32_arm_link_hash_table *globals)
4459 {
4460 int arch = elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch);
4461 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
4462 }
4463
4464 /* Perform a relocation as part of a final link. */
4465
4466 static bfd_reloc_status_type
4467 elf32_arm_final_link_relocate (reloc_howto_type * howto,
4468 bfd * input_bfd,
4469 bfd * output_bfd,
4470 asection * input_section,
4471 bfd_byte * contents,
4472 Elf_Internal_Rela * rel,
4473 bfd_vma value,
4474 struct bfd_link_info * info,
4475 asection * sym_sec,
4476 const char * sym_name,
4477 int sym_flags,
4478 struct elf_link_hash_entry * h,
4479 bfd_boolean * unresolved_reloc_p,
4480 char **error_message)
4481 {
4482 unsigned long r_type = howto->type;
4483 unsigned long r_symndx;
4484 bfd_byte * hit_data = contents + rel->r_offset;
4485 bfd * dynobj = NULL;
4486 Elf_Internal_Shdr * symtab_hdr;
4487 struct elf_link_hash_entry ** sym_hashes;
4488 bfd_vma * local_got_offsets;
4489 asection * sgot = NULL;
4490 asection * splt = NULL;
4491 asection * sreloc = NULL;
4492 bfd_vma addend;
4493 bfd_signed_vma signed_addend;
4494 struct elf32_arm_link_hash_table * globals;
4495
4496 globals = elf32_arm_hash_table (info);
4497
4498 /* Some relocation type map to different relocations depending on the
4499 target. We pick the right one here. */
4500 r_type = arm_real_reloc_type (globals, r_type);
4501 if (r_type != howto->type)
4502 howto = elf32_arm_howto_from_type (r_type);
4503
4504 /* If the start address has been set, then set the EF_ARM_HASENTRY
4505 flag. Setting this more than once is redundant, but the cost is
4506 not too high, and it keeps the code simple.
4507
4508 The test is done here, rather than somewhere else, because the
4509 start address is only set just before the final link commences.
4510
4511 Note - if the user deliberately sets a start address of 0, the
4512 flag will not be set. */
4513 if (bfd_get_start_address (output_bfd) != 0)
4514 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
4515
4516 dynobj = elf_hash_table (info)->dynobj;
4517 if (dynobj)
4518 {
4519 sgot = bfd_get_section_by_name (dynobj, ".got");
4520 splt = bfd_get_section_by_name (dynobj, ".plt");
4521 }
4522 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
4523 sym_hashes = elf_sym_hashes (input_bfd);
4524 local_got_offsets = elf_local_got_offsets (input_bfd);
4525 r_symndx = ELF32_R_SYM (rel->r_info);
4526
4527 if (globals->use_rel)
4528 {
4529 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
4530
4531 if (addend & ((howto->src_mask + 1) >> 1))
4532 {
4533 signed_addend = -1;
4534 signed_addend &= ~ howto->src_mask;
4535 signed_addend |= addend;
4536 }
4537 else
4538 signed_addend = addend;
4539 }
4540 else
4541 addend = signed_addend = rel->r_addend;
4542
4543 switch (r_type)
4544 {
4545 case R_ARM_NONE:
4546 /* We don't need to find a value for this symbol. It's just a
4547 marker. */
4548 *unresolved_reloc_p = FALSE;
4549 return bfd_reloc_ok;
4550
4551 case R_ARM_ABS12:
4552 if (!globals->vxworks_p)
4553 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4554
4555 case R_ARM_PC24:
4556 case R_ARM_ABS32:
4557 case R_ARM_ABS32_NOI:
4558 case R_ARM_REL32:
4559 case R_ARM_REL32_NOI:
4560 case R_ARM_CALL:
4561 case R_ARM_JUMP24:
4562 case R_ARM_XPC25:
4563 case R_ARM_PREL31:
4564 case R_ARM_PLT32:
4565 /* Handle relocations which should use the PLT entry. ABS32/REL32
4566 will use the symbol's value, which may point to a PLT entry, but we
4567 don't need to handle that here. If we created a PLT entry, all
4568 branches in this object should go to it. */
4569 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
4570 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
4571 && h != NULL
4572 && splt != NULL
4573 && h->plt.offset != (bfd_vma) -1)
4574 {
4575 /* If we've created a .plt section, and assigned a PLT entry to
4576 this function, it should not be known to bind locally. If
4577 it were, we would have cleared the PLT entry. */
4578 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
4579
4580 value = (splt->output_section->vma
4581 + splt->output_offset
4582 + h->plt.offset);
4583 *unresolved_reloc_p = FALSE;
4584 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4585 contents, rel->r_offset, value,
4586 rel->r_addend);
4587 }
4588
4589 /* When generating a shared object or relocatable executable, these
4590 relocations are copied into the output file to be resolved at
4591 run time. */
4592 if ((info->shared || globals->root.is_relocatable_executable)
4593 && (input_section->flags & SEC_ALLOC)
4594 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
4595 || !SYMBOL_CALLS_LOCAL (info, h))
4596 && (h == NULL
4597 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4598 || h->root.type != bfd_link_hash_undefweak)
4599 && r_type != R_ARM_PC24
4600 && r_type != R_ARM_CALL
4601 && r_type != R_ARM_JUMP24
4602 && r_type != R_ARM_PREL31
4603 && r_type != R_ARM_PLT32)
4604 {
4605 Elf_Internal_Rela outrel;
4606 bfd_byte *loc;
4607 bfd_boolean skip, relocate;
4608
4609 *unresolved_reloc_p = FALSE;
4610
4611 if (sreloc == NULL)
4612 {
4613 const char * name;
4614
4615 name = (bfd_elf_string_from_elf_section
4616 (input_bfd,
4617 elf_elfheader (input_bfd)->e_shstrndx,
4618 elf_section_data (input_section)->rel_hdr.sh_name));
4619 if (name == NULL)
4620 return bfd_reloc_notsupported;
4621
4622 BFD_ASSERT (reloc_section_p (globals, name, input_section));
4623
4624 sreloc = bfd_get_section_by_name (dynobj, name);
4625 BFD_ASSERT (sreloc != NULL);
4626 }
4627
4628 skip = FALSE;
4629 relocate = FALSE;
4630
4631 outrel.r_addend = addend;
4632 outrel.r_offset =
4633 _bfd_elf_section_offset (output_bfd, info, input_section,
4634 rel->r_offset);
4635 if (outrel.r_offset == (bfd_vma) -1)
4636 skip = TRUE;
4637 else if (outrel.r_offset == (bfd_vma) -2)
4638 skip = TRUE, relocate = TRUE;
4639 outrel.r_offset += (input_section->output_section->vma
4640 + input_section->output_offset);
4641
4642 if (skip)
4643 memset (&outrel, 0, sizeof outrel);
4644 else if (h != NULL
4645 && h->dynindx != -1
4646 && (!info->shared
4647 || !info->symbolic
4648 || !h->def_regular))
4649 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4650 else
4651 {
4652 int symbol;
4653
4654 /* This symbol is local, or marked to become local. */
4655 if (sym_flags == STT_ARM_TFUNC)
4656 value |= 1;
4657 if (globals->symbian_p)
4658 {
4659 asection *osec;
4660
4661 /* On Symbian OS, the data segment and text segement
4662 can be relocated independently. Therefore, we
4663 must indicate the segment to which this
4664 relocation is relative. The BPABI allows us to
4665 use any symbol in the right segment; we just use
4666 the section symbol as it is convenient. (We
4667 cannot use the symbol given by "h" directly as it
4668 will not appear in the dynamic symbol table.)
4669
4670 Note that the dynamic linker ignores the section
4671 symbol value, so we don't subtract osec->vma
4672 from the emitted reloc addend. */
4673 if (sym_sec)
4674 osec = sym_sec->output_section;
4675 else
4676 osec = input_section->output_section;
4677 symbol = elf_section_data (osec)->dynindx;
4678 if (symbol == 0)
4679 {
4680 struct elf_link_hash_table *htab = elf_hash_table (info);
4681
4682 if ((osec->flags & SEC_READONLY) == 0
4683 && htab->data_index_section != NULL)
4684 osec = htab->data_index_section;
4685 else
4686 osec = htab->text_index_section;
4687 symbol = elf_section_data (osec)->dynindx;
4688 }
4689 BFD_ASSERT (symbol != 0);
4690 }
4691 else
4692 /* On SVR4-ish systems, the dynamic loader cannot
4693 relocate the text and data segments independently,
4694 so the symbol does not matter. */
4695 symbol = 0;
4696 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
4697 if (globals->use_rel)
4698 relocate = TRUE;
4699 else
4700 outrel.r_addend += value;
4701 }
4702
4703 loc = sreloc->contents;
4704 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
4705 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4706
4707 /* If this reloc is against an external symbol, we do not want to
4708 fiddle with the addend. Otherwise, we need to include the symbol
4709 value so that it becomes an addend for the dynamic reloc. */
4710 if (! relocate)
4711 return bfd_reloc_ok;
4712
4713 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4714 contents, rel->r_offset, value,
4715 (bfd_vma) 0);
4716 }
4717 else switch (r_type)
4718 {
4719 case R_ARM_ABS12:
4720 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4721
4722 case R_ARM_XPC25: /* Arm BLX instruction. */
4723 case R_ARM_CALL:
4724 case R_ARM_JUMP24:
4725 case R_ARM_PC24: /* Arm B/BL instruction */
4726 case R_ARM_PLT32:
4727 if (r_type == R_ARM_XPC25)
4728 {
4729 /* Check for Arm calling Arm function. */
4730 /* FIXME: Should we translate the instruction into a BL
4731 instruction instead ? */
4732 if (sym_flags != STT_ARM_TFUNC)
4733 (*_bfd_error_handler)
4734 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
4735 input_bfd,
4736 h ? h->root.root.string : "(local)");
4737 }
4738 else if (r_type != R_ARM_CALL || !globals->use_blx)
4739 {
4740 /* Check for Arm calling Thumb function. */
4741 if (sym_flags == STT_ARM_TFUNC)
4742 {
4743 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
4744 output_bfd, input_section,
4745 hit_data, sym_sec, rel->r_offset,
4746 signed_addend, value,
4747 error_message))
4748 return bfd_reloc_ok;
4749 else
4750 return bfd_reloc_dangerous;
4751 }
4752 }
4753
4754 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
4755 where:
4756 S is the address of the symbol in the relocation.
4757 P is address of the instruction being relocated.
4758 A is the addend (extracted from the instruction) in bytes.
4759
4760 S is held in 'value'.
4761 P is the base address of the section containing the
4762 instruction plus the offset of the reloc into that
4763 section, ie:
4764 (input_section->output_section->vma +
4765 input_section->output_offset +
4766 rel->r_offset).
4767 A is the addend, converted into bytes, ie:
4768 (signed_addend * 4)
4769
4770 Note: None of these operations have knowledge of the pipeline
4771 size of the processor, thus it is up to the assembler to
4772 encode this information into the addend. */
4773 value -= (input_section->output_section->vma
4774 + input_section->output_offset);
4775 value -= rel->r_offset;
4776 if (globals->use_rel)
4777 value += (signed_addend << howto->size);
4778 else
4779 /* RELA addends do not have to be adjusted by howto->size. */
4780 value += signed_addend;
4781
4782 signed_addend = value;
4783 signed_addend >>= howto->rightshift;
4784
4785 /* It is not an error for an undefined weak reference to be
4786 out of range. Any program that branches to such a symbol
4787 is going to crash anyway, so there is no point worrying
4788 about getting the destination exactly right. */
4789 if (! h || h->root.type != bfd_link_hash_undefweak)
4790 {
4791 /* Perform a signed range check. */
4792 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
4793 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
4794 return bfd_reloc_overflow;
4795 }
4796
4797 addend = (value & 2);
4798
4799 value = (signed_addend & howto->dst_mask)
4800 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
4801
4802 /* Set the H bit in the BLX instruction. */
4803 if (sym_flags == STT_ARM_TFUNC)
4804 {
4805 if (addend)
4806 value |= (1 << 24);
4807 else
4808 value &= ~(bfd_vma)(1 << 24);
4809 }
4810 if (r_type == R_ARM_CALL)
4811 {
4812 /* Select the correct instruction (BL or BLX). */
4813 if (sym_flags == STT_ARM_TFUNC)
4814 value |= (1 << 28);
4815 else
4816 {
4817 value &= ~(bfd_vma)(1 << 28);
4818 value |= (1 << 24);
4819 }
4820 }
4821 break;
4822
4823 case R_ARM_ABS32:
4824 value += addend;
4825 if (sym_flags == STT_ARM_TFUNC)
4826 value |= 1;
4827 break;
4828
4829 case R_ARM_ABS32_NOI:
4830 value += addend;
4831 break;
4832
4833 case R_ARM_REL32:
4834 value += addend;
4835 if (sym_flags == STT_ARM_TFUNC)
4836 value |= 1;
4837 value -= (input_section->output_section->vma
4838 + input_section->output_offset + rel->r_offset);
4839 break;
4840
4841 case R_ARM_REL32_NOI:
4842 value += addend;
4843 value -= (input_section->output_section->vma
4844 + input_section->output_offset + rel->r_offset);
4845 break;
4846
4847 case R_ARM_PREL31:
4848 value -= (input_section->output_section->vma
4849 + input_section->output_offset + rel->r_offset);
4850 value += signed_addend;
4851 if (! h || h->root.type != bfd_link_hash_undefweak)
4852 {
4853 /* Check for overflow */
4854 if ((value ^ (value >> 1)) & (1 << 30))
4855 return bfd_reloc_overflow;
4856 }
4857 value &= 0x7fffffff;
4858 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
4859 if (sym_flags == STT_ARM_TFUNC)
4860 value |= 1;
4861 break;
4862 }
4863
4864 bfd_put_32 (input_bfd, value, hit_data);
4865 return bfd_reloc_ok;
4866
4867 case R_ARM_ABS8:
4868 value += addend;
4869 if ((long) value > 0x7f || (long) value < -0x80)
4870 return bfd_reloc_overflow;
4871
4872 bfd_put_8 (input_bfd, value, hit_data);
4873 return bfd_reloc_ok;
4874
4875 case R_ARM_ABS16:
4876 value += addend;
4877
4878 if ((long) value > 0x7fff || (long) value < -0x8000)
4879 return bfd_reloc_overflow;
4880
4881 bfd_put_16 (input_bfd, value, hit_data);
4882 return bfd_reloc_ok;
4883
4884 case R_ARM_THM_ABS5:
4885 /* Support ldr and str instructions for the thumb. */
4886 if (globals->use_rel)
4887 {
4888 /* Need to refetch addend. */
4889 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
4890 /* ??? Need to determine shift amount from operand size. */
4891 addend >>= howto->rightshift;
4892 }
4893 value += addend;
4894
4895 /* ??? Isn't value unsigned? */
4896 if ((long) value > 0x1f || (long) value < -0x10)
4897 return bfd_reloc_overflow;
4898
4899 /* ??? Value needs to be properly shifted into place first. */
4900 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
4901 bfd_put_16 (input_bfd, value, hit_data);
4902 return bfd_reloc_ok;
4903
4904 case R_ARM_THM_ALU_PREL_11_0:
4905 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
4906 {
4907 bfd_vma insn;
4908 bfd_signed_vma relocation;
4909
4910 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4911 | bfd_get_16 (input_bfd, hit_data + 2);
4912
4913 if (globals->use_rel)
4914 {
4915 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
4916 | ((insn & (1 << 26)) >> 15);
4917 if (insn & 0xf00000)
4918 signed_addend = -signed_addend;
4919 }
4920
4921 relocation = value + signed_addend;
4922 relocation -= (input_section->output_section->vma
4923 + input_section->output_offset
4924 + rel->r_offset);
4925
4926 value = abs (relocation);
4927
4928 if (value >= 0x1000)
4929 return bfd_reloc_overflow;
4930
4931 insn = (insn & 0xfb0f8f00) | (value & 0xff)
4932 | ((value & 0x700) << 4)
4933 | ((value & 0x800) << 15);
4934 if (relocation < 0)
4935 insn |= 0xa00000;
4936
4937 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4938 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4939
4940 return bfd_reloc_ok;
4941 }
4942
4943 case R_ARM_THM_PC12:
4944 /* Corresponds to: ldr.w reg, [pc, #offset]. */
4945 {
4946 bfd_vma insn;
4947 bfd_signed_vma relocation;
4948
4949 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4950 | bfd_get_16 (input_bfd, hit_data + 2);
4951
4952 if (globals->use_rel)
4953 {
4954 signed_addend = insn & 0xfff;
4955 if (!(insn & (1 << 23)))
4956 signed_addend = -signed_addend;
4957 }
4958
4959 relocation = value + signed_addend;
4960 relocation -= (input_section->output_section->vma
4961 + input_section->output_offset
4962 + rel->r_offset);
4963
4964 value = abs (relocation);
4965
4966 if (value >= 0x1000)
4967 return bfd_reloc_overflow;
4968
4969 insn = (insn & 0xff7ff000) | value;
4970 if (relocation >= 0)
4971 insn |= (1 << 23);
4972
4973 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4974 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4975
4976 return bfd_reloc_ok;
4977 }
4978
4979 case R_ARM_THM_XPC22:
4980 case R_ARM_THM_CALL:
4981 /* Thumb BL (branch long instruction). */
4982 {
4983 bfd_vma relocation;
4984 bfd_vma reloc_sign;
4985 bfd_boolean overflow = FALSE;
4986 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
4987 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
4988 bfd_signed_vma reloc_signed_max;
4989 bfd_signed_vma reloc_signed_min;
4990 bfd_vma check;
4991 bfd_signed_vma signed_check;
4992 int bitsize;
4993 int thumb2 = using_thumb2 (globals);
4994
4995 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
4996 with Thumb-1) involving the J1 and J2 bits. */
4997 if (globals->use_rel)
4998 {
4999 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
5000 bfd_vma upper = upper_insn & 0x3ff;
5001 bfd_vma lower = lower_insn & 0x7ff;
5002 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
5003 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
5004 bfd_vma i1 = j1 ^ s ? 0 : 1;
5005 bfd_vma i2 = j2 ^ s ? 0 : 1;
5006
5007 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
5008 /* Sign extend. */
5009 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
5010
5011 signed_addend = addend;
5012 }
5013
5014 if (r_type == R_ARM_THM_XPC22)
5015 {
5016 /* Check for Thumb to Thumb call. */
5017 /* FIXME: Should we translate the instruction into a BL
5018 instruction instead ? */
5019 if (sym_flags == STT_ARM_TFUNC)
5020 (*_bfd_error_handler)
5021 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
5022 input_bfd,
5023 h ? h->root.root.string : "(local)");
5024 }
5025 else
5026 {
5027 /* If it is not a call to Thumb, assume call to Arm.
5028 If it is a call relative to a section name, then it is not a
5029 function call at all, but rather a long jump. Calls through
5030 the PLT do not require stubs. */
5031 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
5032 && (h == NULL || splt == NULL
5033 || h->plt.offset == (bfd_vma) -1))
5034 {
5035 if (globals->use_blx)
5036 {
5037 /* Convert BL to BLX. */
5038 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5039 }
5040 else if (elf32_thumb_to_arm_stub
5041 (info, sym_name, input_bfd, output_bfd, input_section,
5042 hit_data, sym_sec, rel->r_offset, signed_addend, value,
5043 error_message))
5044 return bfd_reloc_ok;
5045 else
5046 return bfd_reloc_dangerous;
5047 }
5048 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx)
5049 {
5050 /* Make sure this is a BL. */
5051 lower_insn |= 0x1800;
5052 }
5053 }
5054
5055 /* Handle calls via the PLT. */
5056 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
5057 {
5058 value = (splt->output_section->vma
5059 + splt->output_offset
5060 + h->plt.offset);
5061 if (globals->use_blx)
5062 {
5063 /* If the Thumb BLX instruction is available, convert the
5064 BL to a BLX instruction to call the ARM-mode PLT entry. */
5065 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5066 }
5067 else
5068 /* Target the Thumb stub before the ARM PLT entry. */
5069 value -= PLT_THUMB_STUB_SIZE;
5070 *unresolved_reloc_p = FALSE;
5071 }
5072
5073 relocation = value + signed_addend;
5074
5075 relocation -= (input_section->output_section->vma
5076 + input_section->output_offset
5077 + rel->r_offset);
5078
5079 check = relocation >> howto->rightshift;
5080
5081 /* If this is a signed value, the rightshift just dropped
5082 leading 1 bits (assuming twos complement). */
5083 if ((bfd_signed_vma) relocation >= 0)
5084 signed_check = check;
5085 else
5086 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
5087
5088 /* Calculate the permissable maximum and minimum values for
5089 this relocation according to whether we're relocating for
5090 Thumb-2 or not. */
5091 bitsize = howto->bitsize;
5092 if (!thumb2)
5093 bitsize -= 2;
5094 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
5095 reloc_signed_min = ~reloc_signed_max;
5096
5097 /* Assumes two's complement. */
5098 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5099 overflow = TRUE;
5100
5101 if ((lower_insn & 0x1800) == 0x0800)
5102 /* For a BLX instruction, make sure that the relocation is rounded up
5103 to a word boundary. This follows the semantics of the instruction
5104 which specifies that bit 1 of the target address will come from bit
5105 1 of the base address. */
5106 relocation = (relocation + 2) & ~ 3;
5107
5108 /* Put RELOCATION back into the insn. Assumes two's complement.
5109 We use the Thumb-2 encoding, which is safe even if dealing with
5110 a Thumb-1 instruction by virtue of our overflow check above. */
5111 reloc_sign = (signed_check < 0) ? 1 : 0;
5112 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
5113 | ((relocation >> 12) & 0x3ff)
5114 | (reloc_sign << 10);
5115 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
5116 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
5117 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
5118 | ((relocation >> 1) & 0x7ff);
5119
5120 /* Put the relocated value back in the object file: */
5121 bfd_put_16 (input_bfd, upper_insn, hit_data);
5122 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5123
5124 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5125 }
5126 break;
5127
5128 case R_ARM_THM_JUMP24:
5129 /* Thumb32 unconditional branch instruction. */
5130 {
5131 bfd_vma relocation;
5132 bfd_boolean overflow = FALSE;
5133 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5134 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5135 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
5136 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
5137 bfd_vma check;
5138 bfd_signed_vma signed_check;
5139
5140 /* Need to refetch the addend, reconstruct the top three bits, and glue the
5141 two pieces together. */
5142 if (globals->use_rel)
5143 {
5144 bfd_vma S = (upper_insn & 0x0400) >> 10;
5145 bfd_vma hi = (upper_insn & 0x03ff);
5146 bfd_vma I1 = (lower_insn & 0x2000) >> 13;
5147 bfd_vma I2 = (lower_insn & 0x0800) >> 11;
5148 bfd_vma lo = (lower_insn & 0x07ff);
5149
5150 I1 = !(I1 ^ S);
5151 I2 = !(I2 ^ S);
5152 S = !S;
5153
5154 signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1);
5155 signed_addend -= (1 << 24); /* Sign extend. */
5156 }
5157
5158 /* ??? Should handle interworking? GCC might someday try to
5159 use this for tail calls. */
5160
5161 relocation = value + signed_addend;
5162 relocation -= (input_section->output_section->vma
5163 + input_section->output_offset
5164 + rel->r_offset);
5165
5166 check = relocation >> howto->rightshift;
5167
5168 /* If this is a signed value, the rightshift just dropped
5169 leading 1 bits (assuming twos complement). */
5170 if ((bfd_signed_vma) relocation >= 0)
5171 signed_check = check;
5172 else
5173 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
5174
5175 /* Assumes two's complement. */
5176 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5177 overflow = TRUE;
5178
5179 /* Put RELOCATION back into the insn. */
5180 {
5181 bfd_vma S = (relocation & 0x01000000) >> 24;
5182 bfd_vma I1 = (relocation & 0x00800000) >> 23;
5183 bfd_vma I2 = (relocation & 0x00400000) >> 22;
5184 bfd_vma hi = (relocation & 0x003ff000) >> 12;
5185 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
5186
5187 I1 = !(I1 ^ S);
5188 I2 = !(I2 ^ S);
5189
5190 upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi;
5191 lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo;
5192 }
5193
5194 /* Put the relocated value back in the object file: */
5195 bfd_put_16 (input_bfd, upper_insn, hit_data);
5196 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5197
5198 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5199 }
5200
5201 case R_ARM_THM_JUMP19:
5202 /* Thumb32 conditional branch instruction. */
5203 {
5204 bfd_vma relocation;
5205 bfd_boolean overflow = FALSE;
5206 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5207 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5208 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
5209 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
5210 bfd_vma check;
5211 bfd_signed_vma signed_check;
5212
5213 /* Need to refetch the addend, reconstruct the top three bits,
5214 and squish the two 11 bit pieces together. */
5215 if (globals->use_rel)
5216 {
5217 bfd_vma S = (upper_insn & 0x0400) >> 10;
5218 bfd_vma upper = (upper_insn & 0x001f);
5219 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
5220 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
5221 bfd_vma lower = (lower_insn & 0x07ff);
5222
5223 upper |= J2 << 6;
5224 upper |= J1 << 7;
5225 upper |= ~S << 8;
5226 upper -= 0x0100; /* Sign extend. */
5227
5228 addend = (upper << 12) | (lower << 1);
5229 signed_addend = addend;
5230 }
5231
5232 /* ??? Should handle interworking? GCC might someday try to
5233 use this for tail calls. */
5234
5235 relocation = value + signed_addend;
5236 relocation -= (input_section->output_section->vma
5237 + input_section->output_offset
5238 + rel->r_offset);
5239
5240 check = relocation >> howto->rightshift;
5241
5242 /* If this is a signed value, the rightshift just dropped
5243 leading 1 bits (assuming twos complement). */
5244 if ((bfd_signed_vma) relocation >= 0)
5245 signed_check = check;
5246 else
5247 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
5248
5249 /* Assumes two's complement. */
5250 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5251 overflow = TRUE;
5252
5253 /* Put RELOCATION back into the insn. */
5254 {
5255 bfd_vma S = (relocation & 0x00100000) >> 20;
5256 bfd_vma J2 = (relocation & 0x00080000) >> 19;
5257 bfd_vma J1 = (relocation & 0x00040000) >> 18;
5258 bfd_vma hi = (relocation & 0x0003f000) >> 12;
5259 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
5260
5261 upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi;
5262 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
5263 }
5264
5265 /* Put the relocated value back in the object file: */
5266 bfd_put_16 (input_bfd, upper_insn, hit_data);
5267 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5268
5269 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5270 }
5271
5272 case R_ARM_THM_JUMP11:
5273 case R_ARM_THM_JUMP8:
5274 case R_ARM_THM_JUMP6:
5275 /* Thumb B (branch) instruction). */
5276 {
5277 bfd_signed_vma relocation;
5278 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
5279 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
5280 bfd_signed_vma signed_check;
5281
5282 /* CZB cannot jump backward. */
5283 if (r_type == R_ARM_THM_JUMP6)
5284 reloc_signed_min = 0;
5285
5286 if (globals->use_rel)
5287 {
5288 /* Need to refetch addend. */
5289 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
5290 if (addend & ((howto->src_mask + 1) >> 1))
5291 {
5292 signed_addend = -1;
5293 signed_addend &= ~ howto->src_mask;
5294 signed_addend |= addend;
5295 }
5296 else
5297 signed_addend = addend;
5298 /* The value in the insn has been right shifted. We need to
5299 undo this, so that we can perform the address calculation
5300 in terms of bytes. */
5301 signed_addend <<= howto->rightshift;
5302 }
5303 relocation = value + signed_addend;
5304
5305 relocation -= (input_section->output_section->vma
5306 + input_section->output_offset
5307 + rel->r_offset);
5308
5309 relocation >>= howto->rightshift;
5310 signed_check = relocation;
5311
5312 if (r_type == R_ARM_THM_JUMP6)
5313 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
5314 else
5315 relocation &= howto->dst_mask;
5316 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
5317
5318 bfd_put_16 (input_bfd, relocation, hit_data);
5319
5320 /* Assumes two's complement. */
5321 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5322 return bfd_reloc_overflow;
5323
5324 return bfd_reloc_ok;
5325 }
5326
5327 case R_ARM_ALU_PCREL7_0:
5328 case R_ARM_ALU_PCREL15_8:
5329 case R_ARM_ALU_PCREL23_15:
5330 {
5331 bfd_vma insn;
5332 bfd_vma relocation;
5333
5334 insn = bfd_get_32 (input_bfd, hit_data);
5335 if (globals->use_rel)
5336 {
5337 /* Extract the addend. */
5338 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
5339 signed_addend = addend;
5340 }
5341 relocation = value + signed_addend;
5342
5343 relocation -= (input_section->output_section->vma
5344 + input_section->output_offset
5345 + rel->r_offset);
5346 insn = (insn & ~0xfff)
5347 | ((howto->bitpos << 7) & 0xf00)
5348 | ((relocation >> howto->bitpos) & 0xff);
5349 bfd_put_32 (input_bfd, value, hit_data);
5350 }
5351 return bfd_reloc_ok;
5352
5353 case R_ARM_GNU_VTINHERIT:
5354 case R_ARM_GNU_VTENTRY:
5355 return bfd_reloc_ok;
5356
5357 case R_ARM_GOTOFF32:
5358 /* Relocation is relative to the start of the
5359 global offset table. */
5360
5361 BFD_ASSERT (sgot != NULL);
5362 if (sgot == NULL)
5363 return bfd_reloc_notsupported;
5364
5365 /* If we are addressing a Thumb function, we need to adjust the
5366 address by one, so that attempts to call the function pointer will
5367 correctly interpret it as Thumb code. */
5368 if (sym_flags == STT_ARM_TFUNC)
5369 value += 1;
5370
5371 /* Note that sgot->output_offset is not involved in this
5372 calculation. We always want the start of .got. If we
5373 define _GLOBAL_OFFSET_TABLE in a different way, as is
5374 permitted by the ABI, we might have to change this
5375 calculation. */
5376 value -= sgot->output_section->vma;
5377 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5378 contents, rel->r_offset, value,
5379 rel->r_addend);
5380
5381 case R_ARM_GOTPC:
5382 /* Use global offset table as symbol value. */
5383 BFD_ASSERT (sgot != NULL);
5384
5385 if (sgot == NULL)
5386 return bfd_reloc_notsupported;
5387
5388 *unresolved_reloc_p = FALSE;
5389 value = sgot->output_section->vma;
5390 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5391 contents, rel->r_offset, value,
5392 rel->r_addend);
5393
5394 case R_ARM_GOT32:
5395 case R_ARM_GOT_PREL:
5396 /* Relocation is to the entry for this symbol in the
5397 global offset table. */
5398 if (sgot == NULL)
5399 return bfd_reloc_notsupported;
5400
5401 if (h != NULL)
5402 {
5403 bfd_vma off;
5404 bfd_boolean dyn;
5405
5406 off = h->got.offset;
5407 BFD_ASSERT (off != (bfd_vma) -1);
5408 dyn = globals->root.dynamic_sections_created;
5409
5410 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5411 || (info->shared
5412 && SYMBOL_REFERENCES_LOCAL (info, h))
5413 || (ELF_ST_VISIBILITY (h->other)
5414 && h->root.type == bfd_link_hash_undefweak))
5415 {
5416 /* This is actually a static link, or it is a -Bsymbolic link
5417 and the symbol is defined locally. We must initialize this
5418 entry in the global offset table. Since the offset must
5419 always be a multiple of 4, we use the least significant bit
5420 to record whether we have initialized it already.
5421
5422 When doing a dynamic link, we create a .rel(a).got relocation
5423 entry to initialize the value. This is done in the
5424 finish_dynamic_symbol routine. */
5425 if ((off & 1) != 0)
5426 off &= ~1;
5427 else
5428 {
5429 /* If we are addressing a Thumb function, we need to
5430 adjust the address by one, so that attempts to
5431 call the function pointer will correctly
5432 interpret it as Thumb code. */
5433 if (sym_flags == STT_ARM_TFUNC)
5434 value |= 1;
5435
5436 bfd_put_32 (output_bfd, value, sgot->contents + off);
5437 h->got.offset |= 1;
5438 }
5439 }
5440 else
5441 *unresolved_reloc_p = FALSE;
5442
5443 value = sgot->output_offset + off;
5444 }
5445 else
5446 {
5447 bfd_vma off;
5448
5449 BFD_ASSERT (local_got_offsets != NULL &&
5450 local_got_offsets[r_symndx] != (bfd_vma) -1);
5451
5452 off = local_got_offsets[r_symndx];
5453
5454 /* The offset must always be a multiple of 4. We use the
5455 least significant bit to record whether we have already
5456 generated the necessary reloc. */
5457 if ((off & 1) != 0)
5458 off &= ~1;
5459 else
5460 {
5461 /* If we are addressing a Thumb function, we need to
5462 adjust the address by one, so that attempts to
5463 call the function pointer will correctly
5464 interpret it as Thumb code. */
5465 if (sym_flags == STT_ARM_TFUNC)
5466 value |= 1;
5467
5468 if (globals->use_rel)
5469 bfd_put_32 (output_bfd, value, sgot->contents + off);
5470
5471 if (info->shared)
5472 {
5473 asection * srelgot;
5474 Elf_Internal_Rela outrel;
5475 bfd_byte *loc;
5476
5477 srelgot = (bfd_get_section_by_name
5478 (dynobj, RELOC_SECTION (globals, ".got")));
5479 BFD_ASSERT (srelgot != NULL);
5480
5481 outrel.r_addend = addend + value;
5482 outrel.r_offset = (sgot->output_section->vma
5483 + sgot->output_offset
5484 + off);
5485 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5486 loc = srelgot->contents;
5487 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
5488 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5489 }
5490
5491 local_got_offsets[r_symndx] |= 1;
5492 }
5493
5494 value = sgot->output_offset + off;
5495 }
5496 if (r_type != R_ARM_GOT32)
5497 value += sgot->output_section->vma;
5498
5499 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5500 contents, rel->r_offset, value,
5501 rel->r_addend);
5502
5503 case R_ARM_TLS_LDO32:
5504 value = value - dtpoff_base (info);
5505
5506 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5507 contents, rel->r_offset, value,
5508 rel->r_addend);
5509
5510 case R_ARM_TLS_LDM32:
5511 {
5512 bfd_vma off;
5513
5514 if (globals->sgot == NULL)
5515 abort ();
5516
5517 off = globals->tls_ldm_got.offset;
5518
5519 if ((off & 1) != 0)
5520 off &= ~1;
5521 else
5522 {
5523 /* If we don't know the module number, create a relocation
5524 for it. */
5525 if (info->shared)
5526 {
5527 Elf_Internal_Rela outrel;
5528 bfd_byte *loc;
5529
5530 if (globals->srelgot == NULL)
5531 abort ();
5532
5533 outrel.r_addend = 0;
5534 outrel.r_offset = (globals->sgot->output_section->vma
5535 + globals->sgot->output_offset + off);
5536 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
5537
5538 if (globals->use_rel)
5539 bfd_put_32 (output_bfd, outrel.r_addend,
5540 globals->sgot->contents + off);
5541
5542 loc = globals->srelgot->contents;
5543 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
5544 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5545 }
5546 else
5547 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
5548
5549 globals->tls_ldm_got.offset |= 1;
5550 }
5551
5552 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5553 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5554
5555 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5556 contents, rel->r_offset, value,
5557 rel->r_addend);
5558 }
5559
5560 case R_ARM_TLS_GD32:
5561 case R_ARM_TLS_IE32:
5562 {
5563 bfd_vma off;
5564 int indx;
5565 char tls_type;
5566
5567 if (globals->sgot == NULL)
5568 abort ();
5569
5570 indx = 0;
5571 if (h != NULL)
5572 {
5573 bfd_boolean dyn;
5574 dyn = globals->root.dynamic_sections_created;
5575 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5576 && (!info->shared
5577 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5578 {
5579 *unresolved_reloc_p = FALSE;
5580 indx = h->dynindx;
5581 }
5582 off = h->got.offset;
5583 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
5584 }
5585 else
5586 {
5587 if (local_got_offsets == NULL)
5588 abort ();
5589 off = local_got_offsets[r_symndx];
5590 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
5591 }
5592
5593 if (tls_type == GOT_UNKNOWN)
5594 abort ();
5595
5596 if ((off & 1) != 0)
5597 off &= ~1;
5598 else
5599 {
5600 bfd_boolean need_relocs = FALSE;
5601 Elf_Internal_Rela outrel;
5602 bfd_byte *loc = NULL;
5603 int cur_off = off;
5604
5605 /* The GOT entries have not been initialized yet. Do it
5606 now, and emit any relocations. If both an IE GOT and a
5607 GD GOT are necessary, we emit the GD first. */
5608
5609 if ((info->shared || indx != 0)
5610 && (h == NULL
5611 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5612 || h->root.type != bfd_link_hash_undefweak))
5613 {
5614 need_relocs = TRUE;
5615 if (globals->srelgot == NULL)
5616 abort ();
5617 loc = globals->srelgot->contents;
5618 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
5619 }
5620
5621 if (tls_type & GOT_TLS_GD)
5622 {
5623 if (need_relocs)
5624 {
5625 outrel.r_addend = 0;
5626 outrel.r_offset = (globals->sgot->output_section->vma
5627 + globals->sgot->output_offset
5628 + cur_off);
5629 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
5630
5631 if (globals->use_rel)
5632 bfd_put_32 (output_bfd, outrel.r_addend,
5633 globals->sgot->contents + cur_off);
5634
5635 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5636 globals->srelgot->reloc_count++;
5637 loc += RELOC_SIZE (globals);
5638
5639 if (indx == 0)
5640 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5641 globals->sgot->contents + cur_off + 4);
5642 else
5643 {
5644 outrel.r_addend = 0;
5645 outrel.r_info = ELF32_R_INFO (indx,
5646 R_ARM_TLS_DTPOFF32);
5647 outrel.r_offset += 4;
5648
5649 if (globals->use_rel)
5650 bfd_put_32 (output_bfd, outrel.r_addend,
5651 globals->sgot->contents + cur_off + 4);
5652
5653
5654 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5655 globals->srelgot->reloc_count++;
5656 loc += RELOC_SIZE (globals);
5657 }
5658 }
5659 else
5660 {
5661 /* If we are not emitting relocations for a
5662 general dynamic reference, then we must be in a
5663 static link or an executable link with the
5664 symbol binding locally. Mark it as belonging
5665 to module 1, the executable. */
5666 bfd_put_32 (output_bfd, 1,
5667 globals->sgot->contents + cur_off);
5668 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5669 globals->sgot->contents + cur_off + 4);
5670 }
5671
5672 cur_off += 8;
5673 }
5674
5675 if (tls_type & GOT_TLS_IE)
5676 {
5677 if (need_relocs)
5678 {
5679 if (indx == 0)
5680 outrel.r_addend = value - dtpoff_base (info);
5681 else
5682 outrel.r_addend = 0;
5683 outrel.r_offset = (globals->sgot->output_section->vma
5684 + globals->sgot->output_offset
5685 + cur_off);
5686 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
5687
5688 if (globals->use_rel)
5689 bfd_put_32 (output_bfd, outrel.r_addend,
5690 globals->sgot->contents + cur_off);
5691
5692 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5693 globals->srelgot->reloc_count++;
5694 loc += RELOC_SIZE (globals);
5695 }
5696 else
5697 bfd_put_32 (output_bfd, tpoff (info, value),
5698 globals->sgot->contents + cur_off);
5699 cur_off += 4;
5700 }
5701
5702 if (h != NULL)
5703 h->got.offset |= 1;
5704 else
5705 local_got_offsets[r_symndx] |= 1;
5706 }
5707
5708 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
5709 off += 8;
5710 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5711 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5712
5713 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5714 contents, rel->r_offset, value,
5715 rel->r_addend);
5716 }
5717
5718 case R_ARM_TLS_LE32:
5719 if (info->shared)
5720 {
5721 (*_bfd_error_handler)
5722 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
5723 input_bfd, input_section,
5724 (long) rel->r_offset, howto->name);
5725 return FALSE;
5726 }
5727 else
5728 value = tpoff (info, value);
5729
5730 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5731 contents, rel->r_offset, value,
5732 rel->r_addend);
5733
5734 case R_ARM_V4BX:
5735 if (globals->fix_v4bx)
5736 {
5737 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5738
5739 /* Ensure that we have a BX instruction. */
5740 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
5741
5742 /* Preserve Rm (lowest four bits) and the condition code
5743 (highest four bits). Other bits encode MOV PC,Rm. */
5744 insn = (insn & 0xf000000f) | 0x01a0f000;
5745
5746 bfd_put_32 (input_bfd, insn, hit_data);
5747 }
5748 return bfd_reloc_ok;
5749
5750 case R_ARM_MOVW_ABS_NC:
5751 case R_ARM_MOVT_ABS:
5752 case R_ARM_MOVW_PREL_NC:
5753 case R_ARM_MOVT_PREL:
5754 /* Until we properly support segment-base-relative addressing then
5755 we assume the segment base to be zero, as for the group relocations.
5756 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
5757 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
5758 case R_ARM_MOVW_BREL_NC:
5759 case R_ARM_MOVW_BREL:
5760 case R_ARM_MOVT_BREL:
5761 {
5762 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5763
5764 if (globals->use_rel)
5765 {
5766 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
5767 signed_addend = (addend ^ 0x10000) - 0x10000;
5768 }
5769
5770 value += signed_addend;
5771
5772 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
5773 value -= (input_section->output_section->vma
5774 + input_section->output_offset + rel->r_offset);
5775
5776 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
5777 return bfd_reloc_overflow;
5778
5779 if (sym_flags == STT_ARM_TFUNC)
5780 value |= 1;
5781
5782 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
5783 || r_type == R_ARM_MOVT_BREL)
5784 value >>= 16;
5785
5786 insn &= 0xfff0f000;
5787 insn |= value & 0xfff;
5788 insn |= (value & 0xf000) << 4;
5789 bfd_put_32 (input_bfd, insn, hit_data);
5790 }
5791 return bfd_reloc_ok;
5792
5793 case R_ARM_THM_MOVW_ABS_NC:
5794 case R_ARM_THM_MOVT_ABS:
5795 case R_ARM_THM_MOVW_PREL_NC:
5796 case R_ARM_THM_MOVT_PREL:
5797 /* Until we properly support segment-base-relative addressing then
5798 we assume the segment base to be zero, as for the above relocations.
5799 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
5800 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
5801 as R_ARM_THM_MOVT_ABS. */
5802 case R_ARM_THM_MOVW_BREL_NC:
5803 case R_ARM_THM_MOVW_BREL:
5804 case R_ARM_THM_MOVT_BREL:
5805 {
5806 bfd_vma insn;
5807
5808 insn = bfd_get_16 (input_bfd, hit_data) << 16;
5809 insn |= bfd_get_16 (input_bfd, hit_data + 2);
5810
5811 if (globals->use_rel)
5812 {
5813 addend = ((insn >> 4) & 0xf000)
5814 | ((insn >> 15) & 0x0800)
5815 | ((insn >> 4) & 0x0700)
5816 | (insn & 0x00ff);
5817 signed_addend = (addend ^ 0x10000) - 0x10000;
5818 }
5819
5820 value += signed_addend;
5821
5822 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
5823 value -= (input_section->output_section->vma
5824 + input_section->output_offset + rel->r_offset);
5825
5826 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
5827 return bfd_reloc_overflow;
5828
5829 if (sym_flags == STT_ARM_TFUNC)
5830 value |= 1;
5831
5832 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
5833 || r_type == R_ARM_THM_MOVT_BREL)
5834 value >>= 16;
5835
5836 insn &= 0xfbf08f00;
5837 insn |= (value & 0xf000) << 4;
5838 insn |= (value & 0x0800) << 15;
5839 insn |= (value & 0x0700) << 4;
5840 insn |= (value & 0x00ff);
5841
5842 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5843 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5844 }
5845 return bfd_reloc_ok;
5846
5847 case R_ARM_ALU_PC_G0_NC:
5848 case R_ARM_ALU_PC_G1_NC:
5849 case R_ARM_ALU_PC_G0:
5850 case R_ARM_ALU_PC_G1:
5851 case R_ARM_ALU_PC_G2:
5852 case R_ARM_ALU_SB_G0_NC:
5853 case R_ARM_ALU_SB_G1_NC:
5854 case R_ARM_ALU_SB_G0:
5855 case R_ARM_ALU_SB_G1:
5856 case R_ARM_ALU_SB_G2:
5857 {
5858 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5859 bfd_vma pc = input_section->output_section->vma
5860 + input_section->output_offset + rel->r_offset;
5861 /* sb should be the origin of the *segment* containing the symbol.
5862 It is not clear how to obtain this OS-dependent value, so we
5863 make an arbitrary choice of zero. */
5864 bfd_vma sb = 0;
5865 bfd_vma residual;
5866 bfd_vma g_n;
5867 bfd_signed_vma signed_value;
5868 int group = 0;
5869
5870 /* Determine which group of bits to select. */
5871 switch (r_type)
5872 {
5873 case R_ARM_ALU_PC_G0_NC:
5874 case R_ARM_ALU_PC_G0:
5875 case R_ARM_ALU_SB_G0_NC:
5876 case R_ARM_ALU_SB_G0:
5877 group = 0;
5878 break;
5879
5880 case R_ARM_ALU_PC_G1_NC:
5881 case R_ARM_ALU_PC_G1:
5882 case R_ARM_ALU_SB_G1_NC:
5883 case R_ARM_ALU_SB_G1:
5884 group = 1;
5885 break;
5886
5887 case R_ARM_ALU_PC_G2:
5888 case R_ARM_ALU_SB_G2:
5889 group = 2;
5890 break;
5891
5892 default:
5893 abort();
5894 }
5895
5896 /* If REL, extract the addend from the insn. If RELA, it will
5897 have already been fetched for us. */
5898 if (globals->use_rel)
5899 {
5900 int negative;
5901 bfd_vma constant = insn & 0xff;
5902 bfd_vma rotation = (insn & 0xf00) >> 8;
5903
5904 if (rotation == 0)
5905 signed_addend = constant;
5906 else
5907 {
5908 /* Compensate for the fact that in the instruction, the
5909 rotation is stored in multiples of 2 bits. */
5910 rotation *= 2;
5911
5912 /* Rotate "constant" right by "rotation" bits. */
5913 signed_addend = (constant >> rotation) |
5914 (constant << (8 * sizeof (bfd_vma) - rotation));
5915 }
5916
5917 /* Determine if the instruction is an ADD or a SUB.
5918 (For REL, this determines the sign of the addend.) */
5919 negative = identify_add_or_sub (insn);
5920 if (negative == 0)
5921 {
5922 (*_bfd_error_handler)
5923 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
5924 input_bfd, input_section,
5925 (long) rel->r_offset, howto->name);
5926 return bfd_reloc_overflow;
5927 }
5928
5929 signed_addend *= negative;
5930 }
5931
5932 /* Compute the value (X) to go in the place. */
5933 if (r_type == R_ARM_ALU_PC_G0_NC
5934 || r_type == R_ARM_ALU_PC_G1_NC
5935 || r_type == R_ARM_ALU_PC_G0
5936 || r_type == R_ARM_ALU_PC_G1
5937 || r_type == R_ARM_ALU_PC_G2)
5938 /* PC relative. */
5939 signed_value = value - pc + signed_addend;
5940 else
5941 /* Section base relative. */
5942 signed_value = value - sb + signed_addend;
5943
5944 /* If the target symbol is a Thumb function, then set the
5945 Thumb bit in the address. */
5946 if (sym_flags == STT_ARM_TFUNC)
5947 signed_value |= 1;
5948
5949 /* Calculate the value of the relevant G_n, in encoded
5950 constant-with-rotation format. */
5951 g_n = calculate_group_reloc_mask (abs (signed_value), group,
5952 &residual);
5953
5954 /* Check for overflow if required. */
5955 if ((r_type == R_ARM_ALU_PC_G0
5956 || r_type == R_ARM_ALU_PC_G1
5957 || r_type == R_ARM_ALU_PC_G2
5958 || r_type == R_ARM_ALU_SB_G0
5959 || r_type == R_ARM_ALU_SB_G1
5960 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
5961 {
5962 (*_bfd_error_handler)
5963 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
5964 input_bfd, input_section,
5965 (long) rel->r_offset, abs (signed_value), howto->name);
5966 return bfd_reloc_overflow;
5967 }
5968
5969 /* Mask out the value and the ADD/SUB part of the opcode; take care
5970 not to destroy the S bit. */
5971 insn &= 0xff1ff000;
5972
5973 /* Set the opcode according to whether the value to go in the
5974 place is negative. */
5975 if (signed_value < 0)
5976 insn |= 1 << 22;
5977 else
5978 insn |= 1 << 23;
5979
5980 /* Encode the offset. */
5981 insn |= g_n;
5982
5983 bfd_put_32 (input_bfd, insn, hit_data);
5984 }
5985 return bfd_reloc_ok;
5986
5987 case R_ARM_LDR_PC_G0:
5988 case R_ARM_LDR_PC_G1:
5989 case R_ARM_LDR_PC_G2:
5990 case R_ARM_LDR_SB_G0:
5991 case R_ARM_LDR_SB_G1:
5992 case R_ARM_LDR_SB_G2:
5993 {
5994 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5995 bfd_vma pc = input_section->output_section->vma
5996 + input_section->output_offset + rel->r_offset;
5997 bfd_vma sb = 0; /* See note above. */
5998 bfd_vma residual;
5999 bfd_signed_vma signed_value;
6000 int group = 0;
6001
6002 /* Determine which groups of bits to calculate. */
6003 switch (r_type)
6004 {
6005 case R_ARM_LDR_PC_G0:
6006 case R_ARM_LDR_SB_G0:
6007 group = 0;
6008 break;
6009
6010 case R_ARM_LDR_PC_G1:
6011 case R_ARM_LDR_SB_G1:
6012 group = 1;
6013 break;
6014
6015 case R_ARM_LDR_PC_G2:
6016 case R_ARM_LDR_SB_G2:
6017 group = 2;
6018 break;
6019
6020 default:
6021 abort();
6022 }
6023
6024 /* If REL, extract the addend from the insn. If RELA, it will
6025 have already been fetched for us. */
6026 if (globals->use_rel)
6027 {
6028 int negative = (insn & (1 << 23)) ? 1 : -1;
6029 signed_addend = negative * (insn & 0xfff);
6030 }
6031
6032 /* Compute the value (X) to go in the place. */
6033 if (r_type == R_ARM_LDR_PC_G0
6034 || r_type == R_ARM_LDR_PC_G1
6035 || r_type == R_ARM_LDR_PC_G2)
6036 /* PC relative. */
6037 signed_value = value - pc + signed_addend;
6038 else
6039 /* Section base relative. */
6040 signed_value = value - sb + signed_addend;
6041
6042 /* Calculate the value of the relevant G_{n-1} to obtain
6043 the residual at that stage. */
6044 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6045
6046 /* Check for overflow. */
6047 if (residual >= 0x1000)
6048 {
6049 (*_bfd_error_handler)
6050 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6051 input_bfd, input_section,
6052 (long) rel->r_offset, abs (signed_value), howto->name);
6053 return bfd_reloc_overflow;
6054 }
6055
6056 /* Mask out the value and U bit. */
6057 insn &= 0xff7ff000;
6058
6059 /* Set the U bit if the value to go in the place is non-negative. */
6060 if (signed_value >= 0)
6061 insn |= 1 << 23;
6062
6063 /* Encode the offset. */
6064 insn |= residual;
6065
6066 bfd_put_32 (input_bfd, insn, hit_data);
6067 }
6068 return bfd_reloc_ok;
6069
6070 case R_ARM_LDRS_PC_G0:
6071 case R_ARM_LDRS_PC_G1:
6072 case R_ARM_LDRS_PC_G2:
6073 case R_ARM_LDRS_SB_G0:
6074 case R_ARM_LDRS_SB_G1:
6075 case R_ARM_LDRS_SB_G2:
6076 {
6077 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6078 bfd_vma pc = input_section->output_section->vma
6079 + input_section->output_offset + rel->r_offset;
6080 bfd_vma sb = 0; /* See note above. */
6081 bfd_vma residual;
6082 bfd_signed_vma signed_value;
6083 int group = 0;
6084
6085 /* Determine which groups of bits to calculate. */
6086 switch (r_type)
6087 {
6088 case R_ARM_LDRS_PC_G0:
6089 case R_ARM_LDRS_SB_G0:
6090 group = 0;
6091 break;
6092
6093 case R_ARM_LDRS_PC_G1:
6094 case R_ARM_LDRS_SB_G1:
6095 group = 1;
6096 break;
6097
6098 case R_ARM_LDRS_PC_G2:
6099 case R_ARM_LDRS_SB_G2:
6100 group = 2;
6101 break;
6102
6103 default:
6104 abort();
6105 }
6106
6107 /* If REL, extract the addend from the insn. If RELA, it will
6108 have already been fetched for us. */
6109 if (globals->use_rel)
6110 {
6111 int negative = (insn & (1 << 23)) ? 1 : -1;
6112 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
6113 }
6114
6115 /* Compute the value (X) to go in the place. */
6116 if (r_type == R_ARM_LDRS_PC_G0
6117 || r_type == R_ARM_LDRS_PC_G1
6118 || r_type == R_ARM_LDRS_PC_G2)
6119 /* PC relative. */
6120 signed_value = value - pc + signed_addend;
6121 else
6122 /* Section base relative. */
6123 signed_value = value - sb + signed_addend;
6124
6125 /* Calculate the value of the relevant G_{n-1} to obtain
6126 the residual at that stage. */
6127 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6128
6129 /* Check for overflow. */
6130 if (residual >= 0x100)
6131 {
6132 (*_bfd_error_handler)
6133 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6134 input_bfd, input_section,
6135 (long) rel->r_offset, abs (signed_value), howto->name);
6136 return bfd_reloc_overflow;
6137 }
6138
6139 /* Mask out the value and U bit. */
6140 insn &= 0xff7ff0f0;
6141
6142 /* Set the U bit if the value to go in the place is non-negative. */
6143 if (signed_value >= 0)
6144 insn |= 1 << 23;
6145
6146 /* Encode the offset. */
6147 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
6148
6149 bfd_put_32 (input_bfd, insn, hit_data);
6150 }
6151 return bfd_reloc_ok;
6152
6153 case R_ARM_LDC_PC_G0:
6154 case R_ARM_LDC_PC_G1:
6155 case R_ARM_LDC_PC_G2:
6156 case R_ARM_LDC_SB_G0:
6157 case R_ARM_LDC_SB_G1:
6158 case R_ARM_LDC_SB_G2:
6159 {
6160 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6161 bfd_vma pc = input_section->output_section->vma
6162 + input_section->output_offset + rel->r_offset;
6163 bfd_vma sb = 0; /* See note above. */
6164 bfd_vma residual;
6165 bfd_signed_vma signed_value;
6166 int group = 0;
6167
6168 /* Determine which groups of bits to calculate. */
6169 switch (r_type)
6170 {
6171 case R_ARM_LDC_PC_G0:
6172 case R_ARM_LDC_SB_G0:
6173 group = 0;
6174 break;
6175
6176 case R_ARM_LDC_PC_G1:
6177 case R_ARM_LDC_SB_G1:
6178 group = 1;
6179 break;
6180
6181 case R_ARM_LDC_PC_G2:
6182 case R_ARM_LDC_SB_G2:
6183 group = 2;
6184 break;
6185
6186 default:
6187 abort();
6188 }
6189
6190 /* If REL, extract the addend from the insn. If RELA, it will
6191 have already been fetched for us. */
6192 if (globals->use_rel)
6193 {
6194 int negative = (insn & (1 << 23)) ? 1 : -1;
6195 signed_addend = negative * ((insn & 0xff) << 2);
6196 }
6197
6198 /* Compute the value (X) to go in the place. */
6199 if (r_type == R_ARM_LDC_PC_G0
6200 || r_type == R_ARM_LDC_PC_G1
6201 || r_type == R_ARM_LDC_PC_G2)
6202 /* PC relative. */
6203 signed_value = value - pc + signed_addend;
6204 else
6205 /* Section base relative. */
6206 signed_value = value - sb + signed_addend;
6207
6208 /* Calculate the value of the relevant G_{n-1} to obtain
6209 the residual at that stage. */
6210 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6211
6212 /* Check for overflow. (The absolute value to go in the place must be
6213 divisible by four and, after having been divided by four, must
6214 fit in eight bits.) */
6215 if ((residual & 0x3) != 0 || residual >= 0x400)
6216 {
6217 (*_bfd_error_handler)
6218 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6219 input_bfd, input_section,
6220 (long) rel->r_offset, abs (signed_value), howto->name);
6221 return bfd_reloc_overflow;
6222 }
6223
6224 /* Mask out the value and U bit. */
6225 insn &= 0xff7fff00;
6226
6227 /* Set the U bit if the value to go in the place is non-negative. */
6228 if (signed_value >= 0)
6229 insn |= 1 << 23;
6230
6231 /* Encode the offset. */
6232 insn |= residual >> 2;
6233
6234 bfd_put_32 (input_bfd, insn, hit_data);
6235 }
6236 return bfd_reloc_ok;
6237
6238 default:
6239 return bfd_reloc_notsupported;
6240 }
6241 }
6242
6243
6244 static int
6245 uleb128_size (unsigned int i)
6246 {
6247 int size;
6248 size = 1;
6249 while (i >= 0x80)
6250 {
6251 i >>= 7;
6252 size++;
6253 }
6254 return size;
6255 }
6256
6257 /* Return TRUE if the attribute has the default value (0/""). */
6258 static bfd_boolean
6259 is_default_attr (aeabi_attribute *attr)
6260 {
6261 if ((attr->type & 1) && attr->i != 0)
6262 return FALSE;
6263 if ((attr->type & 2) && attr->s && *attr->s)
6264 return FALSE;
6265
6266 return TRUE;
6267 }
6268
6269 /* Return the size of a single attribute. */
6270 static bfd_vma
6271 eabi_attr_size(int tag, aeabi_attribute *attr)
6272 {
6273 bfd_vma size;
6274
6275 if (is_default_attr (attr))
6276 return 0;
6277
6278 size = uleb128_size (tag);
6279 if (attr->type & 1)
6280 size += uleb128_size (attr->i);
6281 if (attr->type & 2)
6282 size += strlen ((char *)attr->s) + 1;
6283 return size;
6284 }
6285
6286 /* Returns the size of the eabi object attributess section. */
6287 bfd_vma
6288 elf32_arm_eabi_attr_size (bfd *abfd)
6289 {
6290 bfd_vma size;
6291 aeabi_attribute *attr;
6292 aeabi_attribute_list *list;
6293 int i;
6294
6295 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
6296 size = 16; /* 'A' <size> "aeabi" 0x1 <size>. */
6297 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
6298 size += eabi_attr_size (i, &attr[i]);
6299
6300 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
6301 list;
6302 list = list->next)
6303 size += eabi_attr_size (list->tag, &list->attr);
6304
6305 return size;
6306 }
6307
6308 static bfd_byte *
6309 write_uleb128 (bfd_byte *p, unsigned int val)
6310 {
6311 bfd_byte c;
6312 do
6313 {
6314 c = val & 0x7f;
6315 val >>= 7;
6316 if (val)
6317 c |= 0x80;
6318 *(p++) = c;
6319 }
6320 while (val);
6321 return p;
6322 }
6323
6324 /* Write attribute ATTR to butter P, and return a pointer to the following
6325 byte. */
6326 static bfd_byte *
6327 write_eabi_attribute (bfd_byte *p, int tag, aeabi_attribute *attr)
6328 {
6329 /* Suppress default entries. */
6330 if (is_default_attr(attr))
6331 return p;
6332
6333 p = write_uleb128 (p, tag);
6334 if (attr->type & 1)
6335 p = write_uleb128 (p, attr->i);
6336 if (attr->type & 2)
6337 {
6338 int len;
6339
6340 len = strlen (attr->s) + 1;
6341 memcpy (p, attr->s, len);
6342 p += len;
6343 }
6344
6345 return p;
6346 }
6347
6348 /* Write the contents of the eabi attributes section to p. */
6349 void
6350 elf32_arm_set_eabi_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size)
6351 {
6352 bfd_byte *p;
6353 aeabi_attribute *attr;
6354 aeabi_attribute_list *list;
6355 int i;
6356
6357 p = contents;
6358 *(p++) = 'A';
6359 bfd_put_32 (abfd, size - 1, p);
6360 p += 4;
6361 memcpy (p, "aeabi", 6);
6362 p += 6;
6363 *(p++) = Tag_File;
6364 bfd_put_32 (abfd, size - 11, p);
6365 p += 4;
6366
6367 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
6368 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
6369 p = write_eabi_attribute (p, i, &attr[i]);
6370
6371 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
6372 list;
6373 list = list->next)
6374 p = write_eabi_attribute (p, list->tag, &list->attr);
6375 }
6376
6377 /* Override final_link to handle EABI object attribute sections. */
6378
6379 static bfd_boolean
6380 elf32_arm_bfd_final_link (bfd *abfd, struct bfd_link_info *info)
6381 {
6382 asection *o;
6383 struct bfd_link_order *p;
6384 asection *attr_section = NULL;
6385 bfd_byte *contents;
6386 bfd_vma size = 0;
6387
6388 /* elf32_arm_merge_private_bfd_data will already have merged the
6389 object attributes. Remove the input sections from the link, and set
6390 the contents of the output secton. */
6391 for (o = abfd->sections; o != NULL; o = o->next)
6392 {
6393 if (strcmp (o->name, ".ARM.attributes") == 0)
6394 {
6395 for (p = o->map_head.link_order; p != NULL; p = p->next)
6396 {
6397 asection *input_section;
6398
6399 if (p->type != bfd_indirect_link_order)
6400 continue;
6401 input_section = p->u.indirect.section;
6402 /* Hack: reset the SEC_HAS_CONTENTS flag so that
6403 elf_link_input_bfd ignores this section. */
6404 input_section->flags &= ~SEC_HAS_CONTENTS;
6405 }
6406
6407 size = elf32_arm_eabi_attr_size (abfd);
6408 bfd_set_section_size (abfd, o, size);
6409 attr_section = o;
6410 /* Skip this section later on. */
6411 o->map_head.link_order = NULL;
6412 }
6413 }
6414 /* Invoke the ELF linker to do all the work. */
6415 if (!bfd_elf_final_link (abfd, info))
6416 return FALSE;
6417
6418 if (attr_section)
6419 {
6420 contents = bfd_malloc(size);
6421 if (contents == NULL)
6422 return FALSE;
6423 elf32_arm_set_eabi_attr_contents (abfd, contents, size);
6424 bfd_set_section_contents (abfd, attr_section, contents, 0, size);
6425 free (contents);
6426 }
6427 return TRUE;
6428 }
6429
6430
6431 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
6432 static void
6433 arm_add_to_rel (bfd * abfd,
6434 bfd_byte * address,
6435 reloc_howto_type * howto,
6436 bfd_signed_vma increment)
6437 {
6438 bfd_signed_vma addend;
6439
6440 if (howto->type == R_ARM_THM_CALL)
6441 {
6442 int upper_insn, lower_insn;
6443 int upper, lower;
6444
6445 upper_insn = bfd_get_16 (abfd, address);
6446 lower_insn = bfd_get_16 (abfd, address + 2);
6447 upper = upper_insn & 0x7ff;
6448 lower = lower_insn & 0x7ff;
6449
6450 addend = (upper << 12) | (lower << 1);
6451 addend += increment;
6452 addend >>= 1;
6453
6454 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
6455 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
6456
6457 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
6458 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
6459 }
6460 else
6461 {
6462 bfd_vma contents;
6463
6464 contents = bfd_get_32 (abfd, address);
6465
6466 /* Get the (signed) value from the instruction. */
6467 addend = contents & howto->src_mask;
6468 if (addend & ((howto->src_mask + 1) >> 1))
6469 {
6470 bfd_signed_vma mask;
6471
6472 mask = -1;
6473 mask &= ~ howto->src_mask;
6474 addend |= mask;
6475 }
6476
6477 /* Add in the increment, (which is a byte value). */
6478 switch (howto->type)
6479 {
6480 default:
6481 addend += increment;
6482 break;
6483
6484 case R_ARM_PC24:
6485 case R_ARM_PLT32:
6486 case R_ARM_CALL:
6487 case R_ARM_JUMP24:
6488 addend <<= howto->size;
6489 addend += increment;
6490
6491 /* Should we check for overflow here ? */
6492
6493 /* Drop any undesired bits. */
6494 addend >>= howto->rightshift;
6495 break;
6496 }
6497
6498 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
6499
6500 bfd_put_32 (abfd, contents, address);
6501 }
6502 }
6503
6504 #define IS_ARM_TLS_RELOC(R_TYPE) \
6505 ((R_TYPE) == R_ARM_TLS_GD32 \
6506 || (R_TYPE) == R_ARM_TLS_LDO32 \
6507 || (R_TYPE) == R_ARM_TLS_LDM32 \
6508 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
6509 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
6510 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
6511 || (R_TYPE) == R_ARM_TLS_LE32 \
6512 || (R_TYPE) == R_ARM_TLS_IE32)
6513
6514 /* Relocate an ARM ELF section. */
6515 static bfd_boolean
6516 elf32_arm_relocate_section (bfd * output_bfd,
6517 struct bfd_link_info * info,
6518 bfd * input_bfd,
6519 asection * input_section,
6520 bfd_byte * contents,
6521 Elf_Internal_Rela * relocs,
6522 Elf_Internal_Sym * local_syms,
6523 asection ** local_sections)
6524 {
6525 Elf_Internal_Shdr *symtab_hdr;
6526 struct elf_link_hash_entry **sym_hashes;
6527 Elf_Internal_Rela *rel;
6528 Elf_Internal_Rela *relend;
6529 const char *name;
6530 struct elf32_arm_link_hash_table * globals;
6531
6532 globals = elf32_arm_hash_table (info);
6533
6534 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
6535 sym_hashes = elf_sym_hashes (input_bfd);
6536
6537 rel = relocs;
6538 relend = relocs + input_section->reloc_count;
6539 for (; rel < relend; rel++)
6540 {
6541 int r_type;
6542 reloc_howto_type * howto;
6543 unsigned long r_symndx;
6544 Elf_Internal_Sym * sym;
6545 asection * sec;
6546 struct elf_link_hash_entry * h;
6547 bfd_vma relocation;
6548 bfd_reloc_status_type r;
6549 arelent bfd_reloc;
6550 char sym_type;
6551 bfd_boolean unresolved_reloc = FALSE;
6552 char *error_message = NULL;
6553
6554 r_symndx = ELF32_R_SYM (rel->r_info);
6555 r_type = ELF32_R_TYPE (rel->r_info);
6556 r_type = arm_real_reloc_type (globals, r_type);
6557
6558 if ( r_type == R_ARM_GNU_VTENTRY
6559 || r_type == R_ARM_GNU_VTINHERIT)
6560 continue;
6561
6562 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
6563 howto = bfd_reloc.howto;
6564
6565 h = NULL;
6566 sym = NULL;
6567 sec = NULL;
6568
6569 if (r_symndx < symtab_hdr->sh_info)
6570 {
6571 sym = local_syms + r_symndx;
6572 sym_type = ELF32_ST_TYPE (sym->st_info);
6573 sec = local_sections[r_symndx];
6574 if (globals->use_rel)
6575 {
6576 relocation = (sec->output_section->vma
6577 + sec->output_offset
6578 + sym->st_value);
6579 if (!info->relocatable
6580 && (sec->flags & SEC_MERGE)
6581 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6582 {
6583 asection *msec;
6584 bfd_vma addend, value;
6585
6586 if (howto->rightshift)
6587 {
6588 (*_bfd_error_handler)
6589 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
6590 input_bfd, input_section,
6591 (long) rel->r_offset, howto->name);
6592 return FALSE;
6593 }
6594
6595 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
6596
6597 /* Get the (signed) value from the instruction. */
6598 addend = value & howto->src_mask;
6599 if (addend & ((howto->src_mask + 1) >> 1))
6600 {
6601 bfd_signed_vma mask;
6602
6603 mask = -1;
6604 mask &= ~ howto->src_mask;
6605 addend |= mask;
6606 }
6607 msec = sec;
6608 addend =
6609 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
6610 - relocation;
6611 addend += msec->output_section->vma + msec->output_offset;
6612 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
6613 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
6614 }
6615 }
6616 else
6617 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6618 }
6619 else
6620 {
6621 bfd_boolean warned;
6622
6623 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6624 r_symndx, symtab_hdr, sym_hashes,
6625 h, sec, relocation,
6626 unresolved_reloc, warned);
6627
6628 sym_type = h->type;
6629 }
6630
6631 if (sec != NULL && elf_discarded_section (sec))
6632 {
6633 /* For relocs against symbols from removed linkonce sections,
6634 or sections discarded by a linker script, we just want the
6635 section contents zeroed. Avoid any special processing. */
6636 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6637 rel->r_info = 0;
6638 rel->r_addend = 0;
6639 continue;
6640 }
6641
6642 if (info->relocatable)
6643 {
6644 /* This is a relocatable link. We don't have to change
6645 anything, unless the reloc is against a section symbol,
6646 in which case we have to adjust according to where the
6647 section symbol winds up in the output section. */
6648 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6649 {
6650 if (globals->use_rel)
6651 arm_add_to_rel (input_bfd, contents + rel->r_offset,
6652 howto, (bfd_signed_vma) sec->output_offset);
6653 else
6654 rel->r_addend += sec->output_offset;
6655 }
6656 continue;
6657 }
6658
6659 if (h != NULL)
6660 name = h->root.root.string;
6661 else
6662 {
6663 name = (bfd_elf_string_from_elf_section
6664 (input_bfd, symtab_hdr->sh_link, sym->st_name));
6665 if (name == NULL || *name == '\0')
6666 name = bfd_section_name (input_bfd, sec);
6667 }
6668
6669 if (r_symndx != 0
6670 && r_type != R_ARM_NONE
6671 && (h == NULL
6672 || h->root.type == bfd_link_hash_defined
6673 || h->root.type == bfd_link_hash_defweak)
6674 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
6675 {
6676 (*_bfd_error_handler)
6677 ((sym_type == STT_TLS
6678 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
6679 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
6680 input_bfd,
6681 input_section,
6682 (long) rel->r_offset,
6683 howto->name,
6684 name);
6685 }
6686
6687 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
6688 input_section, contents, rel,
6689 relocation, info, sec, name,
6690 (h ? ELF_ST_TYPE (h->type) :
6691 ELF_ST_TYPE (sym->st_info)), h,
6692 &unresolved_reloc, &error_message);
6693
6694 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6695 because such sections are not SEC_ALLOC and thus ld.so will
6696 not process them. */
6697 if (unresolved_reloc
6698 && !((input_section->flags & SEC_DEBUGGING) != 0
6699 && h->def_dynamic))
6700 {
6701 (*_bfd_error_handler)
6702 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6703 input_bfd,
6704 input_section,
6705 (long) rel->r_offset,
6706 howto->name,
6707 h->root.root.string);
6708 return FALSE;
6709 }
6710
6711 if (r != bfd_reloc_ok)
6712 {
6713 switch (r)
6714 {
6715 case bfd_reloc_overflow:
6716 /* If the overflowing reloc was to an undefined symbol,
6717 we have already printed one error message and there
6718 is no point complaining again. */
6719 if ((! h ||
6720 h->root.type != bfd_link_hash_undefined)
6721 && (!((*info->callbacks->reloc_overflow)
6722 (info, (h ? &h->root : NULL), name, howto->name,
6723 (bfd_vma) 0, input_bfd, input_section,
6724 rel->r_offset))))
6725 return FALSE;
6726 break;
6727
6728 case bfd_reloc_undefined:
6729 if (!((*info->callbacks->undefined_symbol)
6730 (info, name, input_bfd, input_section,
6731 rel->r_offset, TRUE)))
6732 return FALSE;
6733 break;
6734
6735 case bfd_reloc_outofrange:
6736 error_message = _("out of range");
6737 goto common_error;
6738
6739 case bfd_reloc_notsupported:
6740 error_message = _("unsupported relocation");
6741 goto common_error;
6742
6743 case bfd_reloc_dangerous:
6744 /* error_message should already be set. */
6745 goto common_error;
6746
6747 default:
6748 error_message = _("unknown error");
6749 /* fall through */
6750
6751 common_error:
6752 BFD_ASSERT (error_message != NULL);
6753 if (!((*info->callbacks->reloc_dangerous)
6754 (info, error_message, input_bfd, input_section,
6755 rel->r_offset)))
6756 return FALSE;
6757 break;
6758 }
6759 }
6760 }
6761
6762 return TRUE;
6763 }
6764
6765 /* Allocate/find an object attribute. */
6766 static aeabi_attribute *
6767 elf32_arm_new_eabi_attr (bfd *abfd, int tag)
6768 {
6769 aeabi_attribute *attr;
6770 aeabi_attribute_list *list;
6771 aeabi_attribute_list *p;
6772 aeabi_attribute_list **lastp;
6773
6774
6775 if (tag < NUM_KNOWN_ATTRIBUTES)
6776 {
6777 /* Knwon tags are preallocated. */
6778 attr = &elf32_arm_tdata (abfd)->known_eabi_attributes[tag];
6779 }
6780 else
6781 {
6782 /* Create a new tag. */
6783 list = (aeabi_attribute_list *)
6784 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
6785 memset (list, 0, sizeof (aeabi_attribute_list));
6786 list->tag = tag;
6787 /* Keep the tag list in order. */
6788 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
6789 for (p = *lastp; p; p = p->next)
6790 {
6791 if (tag < p->tag)
6792 break;
6793 lastp = &p->next;
6794 }
6795 list->next = *lastp;
6796 *lastp = list;
6797 attr = &list->attr;
6798 }
6799
6800 return attr;
6801 }
6802
6803 int
6804 elf32_arm_get_eabi_attr_int (bfd *abfd, int tag)
6805 {
6806 aeabi_attribute_list *p;
6807
6808 if (tag < NUM_KNOWN_ATTRIBUTES)
6809 {
6810 /* Knwon tags are preallocated. */
6811 return elf32_arm_tdata (abfd)->known_eabi_attributes[tag].i;
6812 }
6813 else
6814 {
6815 for (p = elf32_arm_tdata (abfd)->other_eabi_attributes;
6816 p;
6817 p = p->next)
6818 {
6819 if (tag == p->tag)
6820 return p->attr.i;
6821 if (tag < p->tag)
6822 break;
6823 }
6824 return 0;
6825 }
6826 }
6827
6828 void
6829 elf32_arm_add_eabi_attr_int (bfd *abfd, int tag, unsigned int i)
6830 {
6831 aeabi_attribute *attr;
6832
6833 attr = elf32_arm_new_eabi_attr (abfd, tag);
6834 attr->type = 1;
6835 attr->i = i;
6836 }
6837
6838 static char *
6839 attr_strdup (bfd *abfd, const char * s)
6840 {
6841 char * p;
6842 int len;
6843
6844 len = strlen (s) + 1;
6845 p = (char *)bfd_alloc(abfd, len);
6846 return memcpy (p, s, len);
6847 }
6848
6849 void
6850 elf32_arm_add_eabi_attr_string (bfd *abfd, int tag, const char *s)
6851 {
6852 aeabi_attribute *attr;
6853
6854 attr = elf32_arm_new_eabi_attr (abfd, tag);
6855 attr->type = 2;
6856 attr->s = attr_strdup (abfd, s);
6857 }
6858
6859 void
6860 elf32_arm_add_eabi_attr_compat (bfd *abfd, unsigned int i, const char *s)
6861 {
6862 aeabi_attribute_list *list;
6863 aeabi_attribute_list *p;
6864 aeabi_attribute_list **lastp;
6865
6866 list = (aeabi_attribute_list *)
6867 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
6868 memset (list, 0, sizeof (aeabi_attribute_list));
6869 list->tag = Tag_compatibility;
6870 list->attr.type = 3;
6871 list->attr.i = i;
6872 list->attr.s = attr_strdup (abfd, s);
6873
6874 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
6875 for (p = *lastp; p; p = p->next)
6876 {
6877 int cmp;
6878 if (p->tag != Tag_compatibility)
6879 break;
6880 cmp = strcmp(s, p->attr.s);
6881 if (cmp < 0 || (cmp == 0 && i < p->attr.i))
6882 break;
6883 lastp = &p->next;
6884 }
6885 list->next = *lastp;
6886 *lastp = list;
6887 }
6888
6889 /* Set the right machine number. */
6890
6891 static bfd_boolean
6892 elf32_arm_object_p (bfd *abfd)
6893 {
6894 unsigned int mach;
6895
6896 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
6897
6898 if (mach != bfd_mach_arm_unknown)
6899 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6900
6901 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
6902 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
6903
6904 else
6905 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6906
6907 return TRUE;
6908 }
6909
6910 /* Function to keep ARM specific flags in the ELF header. */
6911
6912 static bfd_boolean
6913 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
6914 {
6915 if (elf_flags_init (abfd)
6916 && elf_elfheader (abfd)->e_flags != flags)
6917 {
6918 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
6919 {
6920 if (flags & EF_ARM_INTERWORK)
6921 (*_bfd_error_handler)
6922 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
6923 abfd);
6924 else
6925 _bfd_error_handler
6926 (_("Warning: Clearing the interworking flag of %B due to outside request"),
6927 abfd);
6928 }
6929 }
6930 else
6931 {
6932 elf_elfheader (abfd)->e_flags = flags;
6933 elf_flags_init (abfd) = TRUE;
6934 }
6935
6936 return TRUE;
6937 }
6938
6939 /* Copy the eabi object attribute from IBFD to OBFD. */
6940 static void
6941 copy_eabi_attributes (bfd *ibfd, bfd *obfd)
6942 {
6943 aeabi_attribute *in_attr;
6944 aeabi_attribute *out_attr;
6945 aeabi_attribute_list *list;
6946 int i;
6947
6948 in_attr = &elf32_arm_tdata (ibfd)->known_eabi_attributes[4];
6949 out_attr = &elf32_arm_tdata (obfd)->known_eabi_attributes[4];
6950 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
6951 {
6952 out_attr->i = in_attr->i;
6953 if (in_attr->s && *in_attr->s)
6954 out_attr->s = attr_strdup (obfd, in_attr->s);
6955 in_attr++;
6956 out_attr++;
6957 }
6958
6959 for (list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
6960 list;
6961 list = list->next)
6962 {
6963 in_attr = &list->attr;
6964 switch (in_attr->type)
6965 {
6966 case 1:
6967 elf32_arm_add_eabi_attr_int (obfd, list->tag, in_attr->i);
6968 break;
6969 case 2:
6970 elf32_arm_add_eabi_attr_string (obfd, list->tag, in_attr->s);
6971 break;
6972 case 3:
6973 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
6974 break;
6975 default:
6976 abort();
6977 }
6978 }
6979 }
6980
6981
6982 /* Copy backend specific data from one object module to another. */
6983
6984 static bfd_boolean
6985 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6986 {
6987 flagword in_flags;
6988 flagword out_flags;
6989
6990 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6991 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6992 return TRUE;
6993
6994 in_flags = elf_elfheader (ibfd)->e_flags;
6995 out_flags = elf_elfheader (obfd)->e_flags;
6996
6997 if (elf_flags_init (obfd)
6998 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
6999 && in_flags != out_flags)
7000 {
7001 /* Cannot mix APCS26 and APCS32 code. */
7002 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
7003 return FALSE;
7004
7005 /* Cannot mix float APCS and non-float APCS code. */
7006 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
7007 return FALSE;
7008
7009 /* If the src and dest have different interworking flags
7010 then turn off the interworking bit. */
7011 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
7012 {
7013 if (out_flags & EF_ARM_INTERWORK)
7014 _bfd_error_handler
7015 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
7016 obfd, ibfd);
7017
7018 in_flags &= ~EF_ARM_INTERWORK;
7019 }
7020
7021 /* Likewise for PIC, though don't warn for this case. */
7022 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
7023 in_flags &= ~EF_ARM_PIC;
7024 }
7025
7026 elf_elfheader (obfd)->e_flags = in_flags;
7027 elf_flags_init (obfd) = TRUE;
7028
7029 /* Also copy the EI_OSABI field. */
7030 elf_elfheader (obfd)->e_ident[EI_OSABI] =
7031 elf_elfheader (ibfd)->e_ident[EI_OSABI];
7032
7033 /* Copy EABI object attributes. */
7034 copy_eabi_attributes (ibfd, obfd);
7035
7036 return TRUE;
7037 }
7038
7039 /* Values for Tag_ABI_PCS_R9_use. */
7040 enum
7041 {
7042 AEABI_R9_V6,
7043 AEABI_R9_SB,
7044 AEABI_R9_TLS,
7045 AEABI_R9_unused
7046 };
7047
7048 /* Values for Tag_ABI_PCS_RW_data. */
7049 enum
7050 {
7051 AEABI_PCS_RW_data_absolute,
7052 AEABI_PCS_RW_data_PCrel,
7053 AEABI_PCS_RW_data_SBrel,
7054 AEABI_PCS_RW_data_unused
7055 };
7056
7057 /* Values for Tag_ABI_enum_size. */
7058 enum
7059 {
7060 AEABI_enum_unused,
7061 AEABI_enum_short,
7062 AEABI_enum_wide,
7063 AEABI_enum_forced_wide
7064 };
7065
7066 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
7067 are conflicting attributes. */
7068 static bfd_boolean
7069 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
7070 {
7071 aeabi_attribute *in_attr;
7072 aeabi_attribute *out_attr;
7073 aeabi_attribute_list *in_list;
7074 aeabi_attribute_list *out_list;
7075 /* Some tags have 0 = don't care, 1 = strong requirement,
7076 2 = weak requirement. */
7077 static const int order_312[3] = {3, 1, 2};
7078 int i;
7079
7080 if (!elf32_arm_tdata (obfd)->known_eabi_attributes[0].i)
7081 {
7082 /* This is the first object. Copy the attributes. */
7083 copy_eabi_attributes (ibfd, obfd);
7084
7085 /* Use the Tag_null value to indicate the attributes have been
7086 initialized. */
7087 elf32_arm_tdata (obfd)->known_eabi_attributes[0].i = 1;
7088
7089 return TRUE;
7090 }
7091
7092 in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
7093 out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
7094 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
7095 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
7096 {
7097 /* Ignore mismatches if teh object doesn't use floating point. */
7098 if (out_attr[Tag_ABI_FP_number_model].i == 0)
7099 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
7100 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
7101 {
7102 _bfd_error_handler
7103 (_("ERROR: %B uses VFP register arguments, %B does not"),
7104 ibfd, obfd);
7105 return FALSE;
7106 }
7107 }
7108
7109 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
7110 {
7111 /* Merge this attribute with existing attributes. */
7112 switch (i)
7113 {
7114 case Tag_CPU_raw_name:
7115 case Tag_CPU_name:
7116 /* Use whichever has the greatest architecture requirements. We
7117 won't necessarily have both the above tags, so make sure input
7118 name is non-NULL. */
7119 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i
7120 && in_attr[i].s)
7121 out_attr[i].s = attr_strdup(obfd, in_attr[i].s);
7122 break;
7123
7124 case Tag_ABI_optimization_goals:
7125 case Tag_ABI_FP_optimization_goals:
7126 /* Use the first value seen. */
7127 break;
7128
7129 case Tag_CPU_arch:
7130 case Tag_ARM_ISA_use:
7131 case Tag_THUMB_ISA_use:
7132 case Tag_VFP_arch:
7133 case Tag_WMMX_arch:
7134 case Tag_NEON_arch:
7135 /* ??? Do NEON and WMMX conflict? */
7136 case Tag_ABI_FP_rounding:
7137 case Tag_ABI_FP_denormal:
7138 case Tag_ABI_FP_exceptions:
7139 case Tag_ABI_FP_user_exceptions:
7140 case Tag_ABI_FP_number_model:
7141 case Tag_ABI_align8_preserved:
7142 case Tag_ABI_HardFP_use:
7143 /* Use the largest value specified. */
7144 if (in_attr[i].i > out_attr[i].i)
7145 out_attr[i].i = in_attr[i].i;
7146 break;
7147
7148 case Tag_CPU_arch_profile:
7149 /* Warn if conflicting architecture profiles used. */
7150 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
7151 {
7152 _bfd_error_handler
7153 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
7154 ibfd, in_attr[i].i, out_attr[i].i);
7155 return FALSE;
7156 }
7157 if (in_attr[i].i)
7158 out_attr[i].i = in_attr[i].i;
7159 break;
7160 case Tag_PCS_config:
7161 if (out_attr[i].i == 0)
7162 out_attr[i].i = in_attr[i].i;
7163 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
7164 {
7165 /* It's sometimes ok to mix different configs, so this is only
7166 a warning. */
7167 _bfd_error_handler
7168 (_("Warning: %B: Conflicting platform configuration"), ibfd);
7169 }
7170 break;
7171 case Tag_ABI_PCS_R9_use:
7172 if (in_attr[i].i != out_attr[i].i
7173 && out_attr[i].i != AEABI_R9_unused
7174 && in_attr[i].i != AEABI_R9_unused)
7175 {
7176 _bfd_error_handler
7177 (_("ERROR: %B: Conflicting use of R9"), ibfd);
7178 return FALSE;
7179 }
7180 if (out_attr[i].i == AEABI_R9_unused)
7181 out_attr[i].i = in_attr[i].i;
7182 break;
7183 case Tag_ABI_PCS_RW_data:
7184 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
7185 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
7186 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
7187 {
7188 _bfd_error_handler
7189 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
7190 ibfd);
7191 return FALSE;
7192 }
7193 /* Use the smallest value specified. */
7194 if (in_attr[i].i < out_attr[i].i)
7195 out_attr[i].i = in_attr[i].i;
7196 break;
7197 case Tag_ABI_PCS_RO_data:
7198 /* Use the smallest value specified. */
7199 if (in_attr[i].i < out_attr[i].i)
7200 out_attr[i].i = in_attr[i].i;
7201 break;
7202 case Tag_ABI_PCS_GOT_use:
7203 if (in_attr[i].i > 2 || out_attr[i].i > 2
7204 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
7205 out_attr[i].i = in_attr[i].i;
7206 break;
7207 case Tag_ABI_PCS_wchar_t:
7208 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
7209 {
7210 _bfd_error_handler
7211 (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
7212 return FALSE;
7213 }
7214 if (in_attr[i].i)
7215 out_attr[i].i = in_attr[i].i;
7216 break;
7217 case Tag_ABI_align8_needed:
7218 /* ??? Check against Tag_ABI_align8_preserved. */
7219 if (in_attr[i].i > 2 || out_attr[i].i > 2
7220 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
7221 out_attr[i].i = in_attr[i].i;
7222 break;
7223 case Tag_ABI_enum_size:
7224 if (in_attr[i].i != AEABI_enum_unused)
7225 {
7226 if (out_attr[i].i == AEABI_enum_unused
7227 || out_attr[i].i == AEABI_enum_forced_wide)
7228 {
7229 /* The existing object is compatible with anything.
7230 Use whatever requirements the new object has. */
7231 out_attr[i].i = in_attr[i].i;
7232 }
7233 else if (in_attr[i].i != AEABI_enum_forced_wide
7234 && out_attr[i].i != in_attr[i].i
7235 && !elf32_arm_tdata (obfd)->no_enum_size_warning)
7236 {
7237 const char *aeabi_enum_names[] =
7238 { "", "variable-size", "32-bit", "" };
7239 _bfd_error_handler
7240 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
7241 ibfd, aeabi_enum_names[in_attr[i].i],
7242 aeabi_enum_names[out_attr[i].i]);
7243 }
7244 }
7245 break;
7246 case Tag_ABI_VFP_args:
7247 /* Aready done. */
7248 break;
7249 case Tag_ABI_WMMX_args:
7250 if (in_attr[i].i != out_attr[i].i)
7251 {
7252 _bfd_error_handler
7253 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
7254 ibfd, obfd);
7255 return FALSE;
7256 }
7257 break;
7258 default: /* All known attributes should be explicitly covered. */
7259 abort ();
7260 }
7261 }
7262
7263 in_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
7264 out_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
7265 while (in_list && in_list->tag == Tag_compatibility)
7266 {
7267 in_attr = &in_list->attr;
7268 if (in_attr->i == 0)
7269 continue;
7270 if (in_attr->i == 1)
7271 {
7272 _bfd_error_handler
7273 (_("ERROR: %B: Must be processed by '%s' toolchain"),
7274 ibfd, in_attr->s);
7275 return FALSE;
7276 }
7277 if (!out_list || out_list->tag != Tag_compatibility
7278 || strcmp (in_attr->s, out_list->attr.s) != 0)
7279 {
7280 /* Add this compatibility tag to the output. */
7281 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
7282 continue;
7283 }
7284 out_attr = &out_list->attr;
7285 /* Check all the input tags with the same identifier. */
7286 for (;;)
7287 {
7288 if (out_list->tag != Tag_compatibility
7289 || in_attr->i != out_attr->i
7290 || strcmp (in_attr->s, out_attr->s) != 0)
7291 {
7292 _bfd_error_handler
7293 (_("ERROR: %B: Incompatible object tag '%s':%d"),
7294 ibfd, in_attr->s, in_attr->i);
7295 return FALSE;
7296 }
7297 in_list = in_list->next;
7298 if (in_list->tag != Tag_compatibility
7299 || strcmp (in_attr->s, in_list->attr.s) != 0)
7300 break;
7301 in_attr = &in_list->attr;
7302 out_list = out_list->next;
7303 if (out_list)
7304 out_attr = &out_list->attr;
7305 }
7306
7307 /* Check the output doesn't have extra tags with this identifier. */
7308 if (out_list && out_list->tag == Tag_compatibility
7309 && strcmp (in_attr->s, out_list->attr.s) == 0)
7310 {
7311 _bfd_error_handler
7312 (_("ERROR: %B: Incompatible object tag '%s':%d"),
7313 ibfd, in_attr->s, out_list->attr.i);
7314 return FALSE;
7315 }
7316 }
7317
7318 for (; in_list; in_list = in_list->next)
7319 {
7320 if ((in_list->tag & 128) < 64)
7321 {
7322 _bfd_error_handler
7323 (_("Warning: %B: Unknown EABI object attribute %d"),
7324 ibfd, in_list->tag);
7325 break;
7326 }
7327 }
7328 return TRUE;
7329 }
7330
7331
7332 /* Return TRUE if the two EABI versions are incompatible. */
7333
7334 static bfd_boolean
7335 elf32_arm_versions_compatible (unsigned iver, unsigned over)
7336 {
7337 /* v4 and v5 are the same spec before and after it was released,
7338 so allow mixing them. */
7339 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
7340 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
7341 return TRUE;
7342
7343 return (iver == over);
7344 }
7345
7346 /* Merge backend specific data from an object file to the output
7347 object file when linking. */
7348
7349 static bfd_boolean
7350 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
7351 {
7352 flagword out_flags;
7353 flagword in_flags;
7354 bfd_boolean flags_compatible = TRUE;
7355 asection *sec;
7356
7357 /* Check if we have the same endianess. */
7358 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
7359 return FALSE;
7360
7361 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
7362 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
7363 return TRUE;
7364
7365 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
7366 return FALSE;
7367
7368 /* The input BFD must have had its flags initialised. */
7369 /* The following seems bogus to me -- The flags are initialized in
7370 the assembler but I don't think an elf_flags_init field is
7371 written into the object. */
7372 /* BFD_ASSERT (elf_flags_init (ibfd)); */
7373
7374 in_flags = elf_elfheader (ibfd)->e_flags;
7375 out_flags = elf_elfheader (obfd)->e_flags;
7376
7377 if (!elf_flags_init (obfd))
7378 {
7379 /* If the input is the default architecture and had the default
7380 flags then do not bother setting the flags for the output
7381 architecture, instead allow future merges to do this. If no
7382 future merges ever set these flags then they will retain their
7383 uninitialised values, which surprise surprise, correspond
7384 to the default values. */
7385 if (bfd_get_arch_info (ibfd)->the_default
7386 && elf_elfheader (ibfd)->e_flags == 0)
7387 return TRUE;
7388
7389 elf_flags_init (obfd) = TRUE;
7390 elf_elfheader (obfd)->e_flags = in_flags;
7391
7392 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
7393 && bfd_get_arch_info (obfd)->the_default)
7394 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
7395
7396 return TRUE;
7397 }
7398
7399 /* Determine what should happen if the input ARM architecture
7400 does not match the output ARM architecture. */
7401 if (! bfd_arm_merge_machines (ibfd, obfd))
7402 return FALSE;
7403
7404 /* Identical flags must be compatible. */
7405 if (in_flags == out_flags)
7406 return TRUE;
7407
7408 /* Check to see if the input BFD actually contains any sections. If
7409 not, its flags may not have been initialised either, but it
7410 cannot actually cause any incompatiblity. Do not short-circuit
7411 dynamic objects; their section list may be emptied by
7412 elf_link_add_object_symbols.
7413
7414 Also check to see if there are no code sections in the input.
7415 In this case there is no need to check for code specific flags.
7416 XXX - do we need to worry about floating-point format compatability
7417 in data sections ? */
7418 if (!(ibfd->flags & DYNAMIC))
7419 {
7420 bfd_boolean null_input_bfd = TRUE;
7421 bfd_boolean only_data_sections = TRUE;
7422
7423 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7424 {
7425 /* Ignore synthetic glue sections. */
7426 if (strcmp (sec->name, ".glue_7")
7427 && strcmp (sec->name, ".glue_7t"))
7428 {
7429 if ((bfd_get_section_flags (ibfd, sec)
7430 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7431 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7432 only_data_sections = FALSE;
7433
7434 null_input_bfd = FALSE;
7435 break;
7436 }
7437 }
7438
7439 if (null_input_bfd || only_data_sections)
7440 return TRUE;
7441 }
7442
7443 /* Complain about various flag mismatches. */
7444 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
7445 EF_ARM_EABI_VERSION (out_flags)))
7446 {
7447 _bfd_error_handler
7448 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
7449 ibfd, obfd,
7450 (in_flags & EF_ARM_EABIMASK) >> 24,
7451 (out_flags & EF_ARM_EABIMASK) >> 24);
7452 return FALSE;
7453 }
7454
7455 /* Not sure what needs to be checked for EABI versions >= 1. */
7456 /* VxWorks libraries do not use these flags. */
7457 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
7458 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
7459 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
7460 {
7461 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
7462 {
7463 _bfd_error_handler
7464 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
7465 ibfd, obfd,
7466 in_flags & EF_ARM_APCS_26 ? 26 : 32,
7467 out_flags & EF_ARM_APCS_26 ? 26 : 32);
7468 flags_compatible = FALSE;
7469 }
7470
7471 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
7472 {
7473 if (in_flags & EF_ARM_APCS_FLOAT)
7474 _bfd_error_handler
7475 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
7476 ibfd, obfd);
7477 else
7478 _bfd_error_handler
7479 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
7480 ibfd, obfd);
7481
7482 flags_compatible = FALSE;
7483 }
7484
7485 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
7486 {
7487 if (in_flags & EF_ARM_VFP_FLOAT)
7488 _bfd_error_handler
7489 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
7490 ibfd, obfd);
7491 else
7492 _bfd_error_handler
7493 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
7494 ibfd, obfd);
7495
7496 flags_compatible = FALSE;
7497 }
7498
7499 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
7500 {
7501 if (in_flags & EF_ARM_MAVERICK_FLOAT)
7502 _bfd_error_handler
7503 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
7504 ibfd, obfd);
7505 else
7506 _bfd_error_handler
7507 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
7508 ibfd, obfd);
7509
7510 flags_compatible = FALSE;
7511 }
7512
7513 #ifdef EF_ARM_SOFT_FLOAT
7514 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
7515 {
7516 /* We can allow interworking between code that is VFP format
7517 layout, and uses either soft float or integer regs for
7518 passing floating point arguments and results. We already
7519 know that the APCS_FLOAT flags match; similarly for VFP
7520 flags. */
7521 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
7522 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
7523 {
7524 if (in_flags & EF_ARM_SOFT_FLOAT)
7525 _bfd_error_handler
7526 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
7527 ibfd, obfd);
7528 else
7529 _bfd_error_handler
7530 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
7531 ibfd, obfd);
7532
7533 flags_compatible = FALSE;
7534 }
7535 }
7536 #endif
7537
7538 /* Interworking mismatch is only a warning. */
7539 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
7540 {
7541 if (in_flags & EF_ARM_INTERWORK)
7542 {
7543 _bfd_error_handler
7544 (_("Warning: %B supports interworking, whereas %B does not"),
7545 ibfd, obfd);
7546 }
7547 else
7548 {
7549 _bfd_error_handler
7550 (_("Warning: %B does not support interworking, whereas %B does"),
7551 ibfd, obfd);
7552 }
7553 }
7554 }
7555
7556 return flags_compatible;
7557 }
7558
7559 /* Display the flags field. */
7560
7561 static bfd_boolean
7562 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
7563 {
7564 FILE * file = (FILE *) ptr;
7565 unsigned long flags;
7566
7567 BFD_ASSERT (abfd != NULL && ptr != NULL);
7568
7569 /* Print normal ELF private data. */
7570 _bfd_elf_print_private_bfd_data (abfd, ptr);
7571
7572 flags = elf_elfheader (abfd)->e_flags;
7573 /* Ignore init flag - it may not be set, despite the flags field
7574 containing valid data. */
7575
7576 /* xgettext:c-format */
7577 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
7578
7579 switch (EF_ARM_EABI_VERSION (flags))
7580 {
7581 case EF_ARM_EABI_UNKNOWN:
7582 /* The following flag bits are GNU extensions and not part of the
7583 official ARM ELF extended ABI. Hence they are only decoded if
7584 the EABI version is not set. */
7585 if (flags & EF_ARM_INTERWORK)
7586 fprintf (file, _(" [interworking enabled]"));
7587
7588 if (flags & EF_ARM_APCS_26)
7589 fprintf (file, " [APCS-26]");
7590 else
7591 fprintf (file, " [APCS-32]");
7592
7593 if (flags & EF_ARM_VFP_FLOAT)
7594 fprintf (file, _(" [VFP float format]"));
7595 else if (flags & EF_ARM_MAVERICK_FLOAT)
7596 fprintf (file, _(" [Maverick float format]"));
7597 else
7598 fprintf (file, _(" [FPA float format]"));
7599
7600 if (flags & EF_ARM_APCS_FLOAT)
7601 fprintf (file, _(" [floats passed in float registers]"));
7602
7603 if (flags & EF_ARM_PIC)
7604 fprintf (file, _(" [position independent]"));
7605
7606 if (flags & EF_ARM_NEW_ABI)
7607 fprintf (file, _(" [new ABI]"));
7608
7609 if (flags & EF_ARM_OLD_ABI)
7610 fprintf (file, _(" [old ABI]"));
7611
7612 if (flags & EF_ARM_SOFT_FLOAT)
7613 fprintf (file, _(" [software FP]"));
7614
7615 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
7616 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
7617 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
7618 | EF_ARM_MAVERICK_FLOAT);
7619 break;
7620
7621 case EF_ARM_EABI_VER1:
7622 fprintf (file, _(" [Version1 EABI]"));
7623
7624 if (flags & EF_ARM_SYMSARESORTED)
7625 fprintf (file, _(" [sorted symbol table]"));
7626 else
7627 fprintf (file, _(" [unsorted symbol table]"));
7628
7629 flags &= ~ EF_ARM_SYMSARESORTED;
7630 break;
7631
7632 case EF_ARM_EABI_VER2:
7633 fprintf (file, _(" [Version2 EABI]"));
7634
7635 if (flags & EF_ARM_SYMSARESORTED)
7636 fprintf (file, _(" [sorted symbol table]"));
7637 else
7638 fprintf (file, _(" [unsorted symbol table]"));
7639
7640 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
7641 fprintf (file, _(" [dynamic symbols use segment index]"));
7642
7643 if (flags & EF_ARM_MAPSYMSFIRST)
7644 fprintf (file, _(" [mapping symbols precede others]"));
7645
7646 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
7647 | EF_ARM_MAPSYMSFIRST);
7648 break;
7649
7650 case EF_ARM_EABI_VER3:
7651 fprintf (file, _(" [Version3 EABI]"));
7652 break;
7653
7654 case EF_ARM_EABI_VER4:
7655 fprintf (file, _(" [Version4 EABI]"));
7656 goto eabi;
7657
7658 case EF_ARM_EABI_VER5:
7659 fprintf (file, _(" [Version5 EABI]"));
7660 eabi:
7661 if (flags & EF_ARM_BE8)
7662 fprintf (file, _(" [BE8]"));
7663
7664 if (flags & EF_ARM_LE8)
7665 fprintf (file, _(" [LE8]"));
7666
7667 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
7668 break;
7669
7670 default:
7671 fprintf (file, _(" <EABI version unrecognised>"));
7672 break;
7673 }
7674
7675 flags &= ~ EF_ARM_EABIMASK;
7676
7677 if (flags & EF_ARM_RELEXEC)
7678 fprintf (file, _(" [relocatable executable]"));
7679
7680 if (flags & EF_ARM_HASENTRY)
7681 fprintf (file, _(" [has entry point]"));
7682
7683 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
7684
7685 if (flags)
7686 fprintf (file, _("<Unrecognised flag bits set>"));
7687
7688 fputc ('\n', file);
7689
7690 return TRUE;
7691 }
7692
7693 static int
7694 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
7695 {
7696 switch (ELF_ST_TYPE (elf_sym->st_info))
7697 {
7698 case STT_ARM_TFUNC:
7699 return ELF_ST_TYPE (elf_sym->st_info);
7700
7701 case STT_ARM_16BIT:
7702 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
7703 This allows us to distinguish between data used by Thumb instructions
7704 and non-data (which is probably code) inside Thumb regions of an
7705 executable. */
7706 if (type != STT_OBJECT && type != STT_TLS)
7707 return ELF_ST_TYPE (elf_sym->st_info);
7708 break;
7709
7710 default:
7711 break;
7712 }
7713
7714 return type;
7715 }
7716
7717 static asection *
7718 elf32_arm_gc_mark_hook (asection *sec,
7719 struct bfd_link_info *info,
7720 Elf_Internal_Rela *rel,
7721 struct elf_link_hash_entry *h,
7722 Elf_Internal_Sym *sym)
7723 {
7724 if (h != NULL)
7725 switch (ELF32_R_TYPE (rel->r_info))
7726 {
7727 case R_ARM_GNU_VTINHERIT:
7728 case R_ARM_GNU_VTENTRY:
7729 return NULL;
7730 }
7731
7732 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
7733 }
7734
7735 /* Update the got entry reference counts for the section being removed. */
7736
7737 static bfd_boolean
7738 elf32_arm_gc_sweep_hook (bfd * abfd,
7739 struct bfd_link_info * info,
7740 asection * sec,
7741 const Elf_Internal_Rela * relocs)
7742 {
7743 Elf_Internal_Shdr *symtab_hdr;
7744 struct elf_link_hash_entry **sym_hashes;
7745 bfd_signed_vma *local_got_refcounts;
7746 const Elf_Internal_Rela *rel, *relend;
7747 struct elf32_arm_link_hash_table * globals;
7748
7749 globals = elf32_arm_hash_table (info);
7750
7751 elf_section_data (sec)->local_dynrel = NULL;
7752
7753 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7754 sym_hashes = elf_sym_hashes (abfd);
7755 local_got_refcounts = elf_local_got_refcounts (abfd);
7756
7757 relend = relocs + sec->reloc_count;
7758 for (rel = relocs; rel < relend; rel++)
7759 {
7760 unsigned long r_symndx;
7761 struct elf_link_hash_entry *h = NULL;
7762 int r_type;
7763
7764 r_symndx = ELF32_R_SYM (rel->r_info);
7765 if (r_symndx >= symtab_hdr->sh_info)
7766 {
7767 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7768 while (h->root.type == bfd_link_hash_indirect
7769 || h->root.type == bfd_link_hash_warning)
7770 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7771 }
7772
7773 r_type = ELF32_R_TYPE (rel->r_info);
7774 r_type = arm_real_reloc_type (globals, r_type);
7775 switch (r_type)
7776 {
7777 case R_ARM_GOT32:
7778 case R_ARM_GOT_PREL:
7779 case R_ARM_TLS_GD32:
7780 case R_ARM_TLS_IE32:
7781 if (h != NULL)
7782 {
7783 if (h->got.refcount > 0)
7784 h->got.refcount -= 1;
7785 }
7786 else if (local_got_refcounts != NULL)
7787 {
7788 if (local_got_refcounts[r_symndx] > 0)
7789 local_got_refcounts[r_symndx] -= 1;
7790 }
7791 break;
7792
7793 case R_ARM_TLS_LDM32:
7794 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
7795 break;
7796
7797 case R_ARM_ABS32:
7798 case R_ARM_ABS32_NOI:
7799 case R_ARM_REL32:
7800 case R_ARM_REL32_NOI:
7801 case R_ARM_PC24:
7802 case R_ARM_PLT32:
7803 case R_ARM_CALL:
7804 case R_ARM_JUMP24:
7805 case R_ARM_PREL31:
7806 case R_ARM_THM_CALL:
7807 case R_ARM_MOVW_ABS_NC:
7808 case R_ARM_MOVT_ABS:
7809 case R_ARM_MOVW_PREL_NC:
7810 case R_ARM_MOVT_PREL:
7811 case R_ARM_THM_MOVW_ABS_NC:
7812 case R_ARM_THM_MOVT_ABS:
7813 case R_ARM_THM_MOVW_PREL_NC:
7814 case R_ARM_THM_MOVT_PREL:
7815 /* Should the interworking branches be here also? */
7816
7817 if (h != NULL)
7818 {
7819 struct elf32_arm_link_hash_entry *eh;
7820 struct elf32_arm_relocs_copied **pp;
7821 struct elf32_arm_relocs_copied *p;
7822
7823 eh = (struct elf32_arm_link_hash_entry *) h;
7824
7825 if (h->plt.refcount > 0)
7826 {
7827 h->plt.refcount -= 1;
7828 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL)
7829 eh->plt_thumb_refcount--;
7830 }
7831
7832 if (r_type == R_ARM_ABS32
7833 || r_type == R_ARM_REL32
7834 || r_type == R_ARM_ABS32_NOI
7835 || r_type == R_ARM_REL32_NOI)
7836 {
7837 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
7838 pp = &p->next)
7839 if (p->section == sec)
7840 {
7841 p->count -= 1;
7842 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
7843 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
7844 p->pc_count -= 1;
7845 if (p->count == 0)
7846 *pp = p->next;
7847 break;
7848 }
7849 }
7850 }
7851 break;
7852
7853 default:
7854 break;
7855 }
7856 }
7857
7858 return TRUE;
7859 }
7860
7861 /* Look through the relocs for a section during the first phase. */
7862
7863 static bfd_boolean
7864 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
7865 asection *sec, const Elf_Internal_Rela *relocs)
7866 {
7867 Elf_Internal_Shdr *symtab_hdr;
7868 struct elf_link_hash_entry **sym_hashes;
7869 struct elf_link_hash_entry **sym_hashes_end;
7870 const Elf_Internal_Rela *rel;
7871 const Elf_Internal_Rela *rel_end;
7872 bfd *dynobj;
7873 asection *sreloc;
7874 bfd_vma *local_got_offsets;
7875 struct elf32_arm_link_hash_table *htab;
7876
7877 if (info->relocatable)
7878 return TRUE;
7879
7880 htab = elf32_arm_hash_table (info);
7881 sreloc = NULL;
7882
7883 /* Create dynamic sections for relocatable executables so that we can
7884 copy relocations. */
7885 if (htab->root.is_relocatable_executable
7886 && ! htab->root.dynamic_sections_created)
7887 {
7888 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
7889 return FALSE;
7890 }
7891
7892 dynobj = elf_hash_table (info)->dynobj;
7893 local_got_offsets = elf_local_got_offsets (abfd);
7894
7895 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7896 sym_hashes = elf_sym_hashes (abfd);
7897 sym_hashes_end = sym_hashes
7898 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
7899
7900 if (!elf_bad_symtab (abfd))
7901 sym_hashes_end -= symtab_hdr->sh_info;
7902
7903 rel_end = relocs + sec->reloc_count;
7904 for (rel = relocs; rel < rel_end; rel++)
7905 {
7906 struct elf_link_hash_entry *h;
7907 struct elf32_arm_link_hash_entry *eh;
7908 unsigned long r_symndx;
7909 int r_type;
7910
7911 r_symndx = ELF32_R_SYM (rel->r_info);
7912 r_type = ELF32_R_TYPE (rel->r_info);
7913 r_type = arm_real_reloc_type (htab, r_type);
7914
7915 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
7916 {
7917 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
7918 r_symndx);
7919 return FALSE;
7920 }
7921
7922 if (r_symndx < symtab_hdr->sh_info)
7923 h = NULL;
7924 else
7925 {
7926 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7927 while (h->root.type == bfd_link_hash_indirect
7928 || h->root.type == bfd_link_hash_warning)
7929 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7930 }
7931
7932 eh = (struct elf32_arm_link_hash_entry *) h;
7933
7934 switch (r_type)
7935 {
7936 case R_ARM_GOT32:
7937 case R_ARM_GOT_PREL:
7938 case R_ARM_TLS_GD32:
7939 case R_ARM_TLS_IE32:
7940 /* This symbol requires a global offset table entry. */
7941 {
7942 int tls_type, old_tls_type;
7943
7944 switch (r_type)
7945 {
7946 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
7947 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
7948 default: tls_type = GOT_NORMAL; break;
7949 }
7950
7951 if (h != NULL)
7952 {
7953 h->got.refcount++;
7954 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
7955 }
7956 else
7957 {
7958 bfd_signed_vma *local_got_refcounts;
7959
7960 /* This is a global offset table entry for a local symbol. */
7961 local_got_refcounts = elf_local_got_refcounts (abfd);
7962 if (local_got_refcounts == NULL)
7963 {
7964 bfd_size_type size;
7965
7966 size = symtab_hdr->sh_info;
7967 size *= (sizeof (bfd_signed_vma) + sizeof(char));
7968 local_got_refcounts = bfd_zalloc (abfd, size);
7969 if (local_got_refcounts == NULL)
7970 return FALSE;
7971 elf_local_got_refcounts (abfd) = local_got_refcounts;
7972 elf32_arm_local_got_tls_type (abfd)
7973 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
7974 }
7975 local_got_refcounts[r_symndx] += 1;
7976 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
7977 }
7978
7979 /* We will already have issued an error message if there is a
7980 TLS / non-TLS mismatch, based on the symbol type. We don't
7981 support any linker relaxations. So just combine any TLS
7982 types needed. */
7983 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
7984 && tls_type != GOT_NORMAL)
7985 tls_type |= old_tls_type;
7986
7987 if (old_tls_type != tls_type)
7988 {
7989 if (h != NULL)
7990 elf32_arm_hash_entry (h)->tls_type = tls_type;
7991 else
7992 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
7993 }
7994 }
7995 /* Fall through */
7996
7997 case R_ARM_TLS_LDM32:
7998 if (r_type == R_ARM_TLS_LDM32)
7999 htab->tls_ldm_got.refcount++;
8000 /* Fall through */
8001
8002 case R_ARM_GOTOFF32:
8003 case R_ARM_GOTPC:
8004 if (htab->sgot == NULL)
8005 {
8006 if (htab->root.dynobj == NULL)
8007 htab->root.dynobj = abfd;
8008 if (!create_got_section (htab->root.dynobj, info))
8009 return FALSE;
8010 }
8011 break;
8012
8013 case R_ARM_ABS12:
8014 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
8015 ldr __GOTT_INDEX__ offsets. */
8016 if (!htab->vxworks_p)
8017 break;
8018 /* Fall through */
8019
8020 case R_ARM_ABS32:
8021 case R_ARM_ABS32_NOI:
8022 case R_ARM_REL32:
8023 case R_ARM_REL32_NOI:
8024 case R_ARM_PC24:
8025 case R_ARM_PLT32:
8026 case R_ARM_CALL:
8027 case R_ARM_JUMP24:
8028 case R_ARM_PREL31:
8029 case R_ARM_THM_CALL:
8030 case R_ARM_MOVW_ABS_NC:
8031 case R_ARM_MOVT_ABS:
8032 case R_ARM_MOVW_PREL_NC:
8033 case R_ARM_MOVT_PREL:
8034 case R_ARM_THM_MOVW_ABS_NC:
8035 case R_ARM_THM_MOVT_ABS:
8036 case R_ARM_THM_MOVW_PREL_NC:
8037 case R_ARM_THM_MOVT_PREL:
8038 /* Should the interworking branches be listed here? */
8039 if (h != NULL)
8040 {
8041 /* If this reloc is in a read-only section, we might
8042 need a copy reloc. We can't check reliably at this
8043 stage whether the section is read-only, as input
8044 sections have not yet been mapped to output sections.
8045 Tentatively set the flag for now, and correct in
8046 adjust_dynamic_symbol. */
8047 if (!info->shared)
8048 h->non_got_ref = 1;
8049
8050 /* We may need a .plt entry if the function this reloc
8051 refers to is in a different object. We can't tell for
8052 sure yet, because something later might force the
8053 symbol local. */
8054 if (r_type != R_ARM_ABS32
8055 && r_type != R_ARM_REL32
8056 && r_type != R_ARM_ABS32_NOI
8057 && r_type != R_ARM_REL32_NOI)
8058 h->needs_plt = 1;
8059
8060 /* If we create a PLT entry, this relocation will reference
8061 it, even if it's an ABS32 relocation. */
8062 h->plt.refcount += 1;
8063
8064 if (r_type == R_ARM_THM_CALL)
8065 eh->plt_thumb_refcount += 1;
8066 }
8067
8068 /* If we are creating a shared library or relocatable executable,
8069 and this is a reloc against a global symbol, or a non PC
8070 relative reloc against a local symbol, then we need to copy
8071 the reloc into the shared library. However, if we are linking
8072 with -Bsymbolic, we do not need to copy a reloc against a
8073 global symbol which is defined in an object we are
8074 including in the link (i.e., DEF_REGULAR is set). At
8075 this point we have not seen all the input files, so it is
8076 possible that DEF_REGULAR is not set now but will be set
8077 later (it is never cleared). We account for that
8078 possibility below by storing information in the
8079 relocs_copied field of the hash table entry. */
8080 if ((info->shared || htab->root.is_relocatable_executable)
8081 && (sec->flags & SEC_ALLOC) != 0
8082 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
8083 || (h != NULL && ! h->needs_plt
8084 && (! info->symbolic || ! h->def_regular))))
8085 {
8086 struct elf32_arm_relocs_copied *p, **head;
8087
8088 /* When creating a shared object, we must copy these
8089 reloc types into the output file. We create a reloc
8090 section in dynobj and make room for this reloc. */
8091 if (sreloc == NULL)
8092 {
8093 const char * name;
8094
8095 name = (bfd_elf_string_from_elf_section
8096 (abfd,
8097 elf_elfheader (abfd)->e_shstrndx,
8098 elf_section_data (sec)->rel_hdr.sh_name));
8099 if (name == NULL)
8100 return FALSE;
8101
8102 BFD_ASSERT (reloc_section_p (htab, name, sec));
8103
8104 sreloc = bfd_get_section_by_name (dynobj, name);
8105 if (sreloc == NULL)
8106 {
8107 flagword flags;
8108
8109 flags = (SEC_HAS_CONTENTS | SEC_READONLY
8110 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
8111 if ((sec->flags & SEC_ALLOC) != 0
8112 /* BPABI objects never have dynamic
8113 relocations mapped. */
8114 && !htab->symbian_p)
8115 flags |= SEC_ALLOC | SEC_LOAD;
8116 sreloc = bfd_make_section_with_flags (dynobj,
8117 name,
8118 flags);
8119 if (sreloc == NULL
8120 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
8121 return FALSE;
8122 }
8123
8124 elf_section_data (sec)->sreloc = sreloc;
8125 }
8126
8127 /* If this is a global symbol, we count the number of
8128 relocations we need for this symbol. */
8129 if (h != NULL)
8130 {
8131 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
8132 }
8133 else
8134 {
8135 /* Track dynamic relocs needed for local syms too.
8136 We really need local syms available to do this
8137 easily. Oh well. */
8138
8139 asection *s;
8140 void *vpp;
8141
8142 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
8143 sec, r_symndx);
8144 if (s == NULL)
8145 return FALSE;
8146
8147 vpp = &elf_section_data (s)->local_dynrel;
8148 head = (struct elf32_arm_relocs_copied **) vpp;
8149 }
8150
8151 p = *head;
8152 if (p == NULL || p->section != sec)
8153 {
8154 bfd_size_type amt = sizeof *p;
8155
8156 p = bfd_alloc (htab->root.dynobj, amt);
8157 if (p == NULL)
8158 return FALSE;
8159 p->next = *head;
8160 *head = p;
8161 p->section = sec;
8162 p->count = 0;
8163 p->pc_count = 0;
8164 }
8165
8166 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
8167 p->pc_count += 1;
8168 p->count += 1;
8169 }
8170 break;
8171
8172 /* This relocation describes the C++ object vtable hierarchy.
8173 Reconstruct it for later use during GC. */
8174 case R_ARM_GNU_VTINHERIT:
8175 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
8176 return FALSE;
8177 break;
8178
8179 /* This relocation describes which C++ vtable entries are actually
8180 used. Record for later use during GC. */
8181 case R_ARM_GNU_VTENTRY:
8182 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
8183 return FALSE;
8184 break;
8185 }
8186 }
8187
8188 return TRUE;
8189 }
8190
8191 /* Unwinding tables are not referenced directly. This pass marks them as
8192 required if the corresponding code section is marked. */
8193
8194 static bfd_boolean
8195 elf32_arm_gc_mark_extra_sections(struct bfd_link_info *info,
8196 elf_gc_mark_hook_fn gc_mark_hook)
8197 {
8198 bfd *sub;
8199 Elf_Internal_Shdr **elf_shdrp;
8200 bfd_boolean again;
8201
8202 /* Marking EH data may cause additional code sections to be marked,
8203 requiring multiple passes. */
8204 again = TRUE;
8205 while (again)
8206 {
8207 again = FALSE;
8208 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
8209 {
8210 asection *o;
8211
8212 if (bfd_get_flavour (sub) != bfd_target_elf_flavour)
8213 continue;
8214
8215 elf_shdrp = elf_elfsections (sub);
8216 for (o = sub->sections; o != NULL; o = o->next)
8217 {
8218 Elf_Internal_Shdr *hdr;
8219 hdr = &elf_section_data (o)->this_hdr;
8220 if (hdr->sh_type == SHT_ARM_EXIDX && hdr->sh_link
8221 && !o->gc_mark
8222 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
8223 {
8224 again = TRUE;
8225 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
8226 return FALSE;
8227 }
8228 }
8229 }
8230 }
8231
8232 return TRUE;
8233 }
8234
8235 /* Treat mapping symbols as special target symbols. */
8236
8237 static bfd_boolean
8238 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
8239 {
8240 return bfd_is_arm_special_symbol_name (sym->name,
8241 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
8242 }
8243
8244 /* This is a copy of elf_find_function() from elf.c except that
8245 ARM mapping symbols are ignored when looking for function names
8246 and STT_ARM_TFUNC is considered to a function type. */
8247
8248 static bfd_boolean
8249 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
8250 asection * section,
8251 asymbol ** symbols,
8252 bfd_vma offset,
8253 const char ** filename_ptr,
8254 const char ** functionname_ptr)
8255 {
8256 const char * filename = NULL;
8257 asymbol * func = NULL;
8258 bfd_vma low_func = 0;
8259 asymbol ** p;
8260
8261 for (p = symbols; *p != NULL; p++)
8262 {
8263 elf_symbol_type *q;
8264
8265 q = (elf_symbol_type *) *p;
8266
8267 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
8268 {
8269 default:
8270 break;
8271 case STT_FILE:
8272 filename = bfd_asymbol_name (&q->symbol);
8273 break;
8274 case STT_FUNC:
8275 case STT_ARM_TFUNC:
8276 case STT_NOTYPE:
8277 /* Skip mapping symbols. */
8278 if ((q->symbol.flags & BSF_LOCAL)
8279 && bfd_is_arm_special_symbol_name (q->symbol.name,
8280 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
8281 continue;
8282 /* Fall through. */
8283 if (bfd_get_section (&q->symbol) == section
8284 && q->symbol.value >= low_func
8285 && q->symbol.value <= offset)
8286 {
8287 func = (asymbol *) q;
8288 low_func = q->symbol.value;
8289 }
8290 break;
8291 }
8292 }
8293
8294 if (func == NULL)
8295 return FALSE;
8296
8297 if (filename_ptr)
8298 *filename_ptr = filename;
8299 if (functionname_ptr)
8300 *functionname_ptr = bfd_asymbol_name (func);
8301
8302 return TRUE;
8303 }
8304
8305
8306 /* Find the nearest line to a particular section and offset, for error
8307 reporting. This code is a duplicate of the code in elf.c, except
8308 that it uses arm_elf_find_function. */
8309
8310 static bfd_boolean
8311 elf32_arm_find_nearest_line (bfd * abfd,
8312 asection * section,
8313 asymbol ** symbols,
8314 bfd_vma offset,
8315 const char ** filename_ptr,
8316 const char ** functionname_ptr,
8317 unsigned int * line_ptr)
8318 {
8319 bfd_boolean found = FALSE;
8320
8321 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
8322
8323 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
8324 filename_ptr, functionname_ptr,
8325 line_ptr, 0,
8326 & elf_tdata (abfd)->dwarf2_find_line_info))
8327 {
8328 if (!*functionname_ptr)
8329 arm_elf_find_function (abfd, section, symbols, offset,
8330 *filename_ptr ? NULL : filename_ptr,
8331 functionname_ptr);
8332
8333 return TRUE;
8334 }
8335
8336 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
8337 & found, filename_ptr,
8338 functionname_ptr, line_ptr,
8339 & elf_tdata (abfd)->line_info))
8340 return FALSE;
8341
8342 if (found && (*functionname_ptr || *line_ptr))
8343 return TRUE;
8344
8345 if (symbols == NULL)
8346 return FALSE;
8347
8348 if (! arm_elf_find_function (abfd, section, symbols, offset,
8349 filename_ptr, functionname_ptr))
8350 return FALSE;
8351
8352 *line_ptr = 0;
8353 return TRUE;
8354 }
8355
8356 static bfd_boolean
8357 elf32_arm_find_inliner_info (bfd * abfd,
8358 const char ** filename_ptr,
8359 const char ** functionname_ptr,
8360 unsigned int * line_ptr)
8361 {
8362 bfd_boolean found;
8363 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
8364 functionname_ptr, line_ptr,
8365 & elf_tdata (abfd)->dwarf2_find_line_info);
8366 return found;
8367 }
8368
8369 /* Adjust a symbol defined by a dynamic object and referenced by a
8370 regular object. The current definition is in some section of the
8371 dynamic object, but we're not including those sections. We have to
8372 change the definition to something the rest of the link can
8373 understand. */
8374
8375 static bfd_boolean
8376 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
8377 struct elf_link_hash_entry * h)
8378 {
8379 bfd * dynobj;
8380 asection * s;
8381 unsigned int power_of_two;
8382 struct elf32_arm_link_hash_entry * eh;
8383 struct elf32_arm_link_hash_table *globals;
8384
8385 globals = elf32_arm_hash_table (info);
8386 dynobj = elf_hash_table (info)->dynobj;
8387
8388 /* Make sure we know what is going on here. */
8389 BFD_ASSERT (dynobj != NULL
8390 && (h->needs_plt
8391 || h->u.weakdef != NULL
8392 || (h->def_dynamic
8393 && h->ref_regular
8394 && !h->def_regular)));
8395
8396 eh = (struct elf32_arm_link_hash_entry *) h;
8397
8398 /* If this is a function, put it in the procedure linkage table. We
8399 will fill in the contents of the procedure linkage table later,
8400 when we know the address of the .got section. */
8401 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
8402 || h->needs_plt)
8403 {
8404 if (h->plt.refcount <= 0
8405 || SYMBOL_CALLS_LOCAL (info, h)
8406 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8407 && h->root.type == bfd_link_hash_undefweak))
8408 {
8409 /* This case can occur if we saw a PLT32 reloc in an input
8410 file, but the symbol was never referred to by a dynamic
8411 object, or if all references were garbage collected. In
8412 such a case, we don't actually need to build a procedure
8413 linkage table, and we can just do a PC24 reloc instead. */
8414 h->plt.offset = (bfd_vma) -1;
8415 eh->plt_thumb_refcount = 0;
8416 h->needs_plt = 0;
8417 }
8418
8419 return TRUE;
8420 }
8421 else
8422 {
8423 /* It's possible that we incorrectly decided a .plt reloc was
8424 needed for an R_ARM_PC24 or similar reloc to a non-function sym
8425 in check_relocs. We can't decide accurately between function
8426 and non-function syms in check-relocs; Objects loaded later in
8427 the link may change h->type. So fix it now. */
8428 h->plt.offset = (bfd_vma) -1;
8429 eh->plt_thumb_refcount = 0;
8430 }
8431
8432 /* If this is a weak symbol, and there is a real definition, the
8433 processor independent code will have arranged for us to see the
8434 real definition first, and we can just use the same value. */
8435 if (h->u.weakdef != NULL)
8436 {
8437 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
8438 || h->u.weakdef->root.type == bfd_link_hash_defweak);
8439 h->root.u.def.section = h->u.weakdef->root.u.def.section;
8440 h->root.u.def.value = h->u.weakdef->root.u.def.value;
8441 return TRUE;
8442 }
8443
8444 /* If there are no non-GOT references, we do not need a copy
8445 relocation. */
8446 if (!h->non_got_ref)
8447 return TRUE;
8448
8449 /* This is a reference to a symbol defined by a dynamic object which
8450 is not a function. */
8451
8452 /* If we are creating a shared library, we must presume that the
8453 only references to the symbol are via the global offset table.
8454 For such cases we need not do anything here; the relocations will
8455 be handled correctly by relocate_section. Relocatable executables
8456 can reference data in shared objects directly, so we don't need to
8457 do anything here. */
8458 if (info->shared || globals->root.is_relocatable_executable)
8459 return TRUE;
8460
8461 if (h->size == 0)
8462 {
8463 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
8464 h->root.root.string);
8465 return TRUE;
8466 }
8467
8468 /* We must allocate the symbol in our .dynbss section, which will
8469 become part of the .bss section of the executable. There will be
8470 an entry for this symbol in the .dynsym section. The dynamic
8471 object will contain position independent code, so all references
8472 from the dynamic object to this symbol will go through the global
8473 offset table. The dynamic linker will use the .dynsym entry to
8474 determine the address it must put in the global offset table, so
8475 both the dynamic object and the regular object will refer to the
8476 same memory location for the variable. */
8477 s = bfd_get_section_by_name (dynobj, ".dynbss");
8478 BFD_ASSERT (s != NULL);
8479
8480 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
8481 copy the initial value out of the dynamic object and into the
8482 runtime process image. We need to remember the offset into the
8483 .rel(a).bss section we are going to use. */
8484 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
8485 {
8486 asection *srel;
8487
8488 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
8489 BFD_ASSERT (srel != NULL);
8490 srel->size += RELOC_SIZE (globals);
8491 h->needs_copy = 1;
8492 }
8493
8494 /* We need to figure out the alignment required for this symbol. I
8495 have no idea how ELF linkers handle this. */
8496 power_of_two = bfd_log2 (h->size);
8497 if (power_of_two > 3)
8498 power_of_two = 3;
8499
8500 /* Apply the required alignment. */
8501 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
8502 if (power_of_two > bfd_get_section_alignment (dynobj, s))
8503 {
8504 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
8505 return FALSE;
8506 }
8507
8508 /* Define the symbol as being at this point in the section. */
8509 h->root.u.def.section = s;
8510 h->root.u.def.value = s->size;
8511
8512 /* Increment the section size to make room for the symbol. */
8513 s->size += h->size;
8514
8515 return TRUE;
8516 }
8517
8518 /* Allocate space in .plt, .got and associated reloc sections for
8519 dynamic relocs. */
8520
8521 static bfd_boolean
8522 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
8523 {
8524 struct bfd_link_info *info;
8525 struct elf32_arm_link_hash_table *htab;
8526 struct elf32_arm_link_hash_entry *eh;
8527 struct elf32_arm_relocs_copied *p;
8528
8529 eh = (struct elf32_arm_link_hash_entry *) h;
8530
8531 if (h->root.type == bfd_link_hash_indirect)
8532 return TRUE;
8533
8534 if (h->root.type == bfd_link_hash_warning)
8535 /* When warning symbols are created, they **replace** the "real"
8536 entry in the hash table, thus we never get to see the real
8537 symbol in a hash traversal. So look at it now. */
8538 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8539
8540 info = (struct bfd_link_info *) inf;
8541 htab = elf32_arm_hash_table (info);
8542
8543 if (htab->root.dynamic_sections_created
8544 && h->plt.refcount > 0)
8545 {
8546 /* Make sure this symbol is output as a dynamic symbol.
8547 Undefined weak syms won't yet be marked as dynamic. */
8548 if (h->dynindx == -1
8549 && !h->forced_local)
8550 {
8551 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8552 return FALSE;
8553 }
8554
8555 if (info->shared
8556 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
8557 {
8558 asection *s = htab->splt;
8559
8560 /* If this is the first .plt entry, make room for the special
8561 first entry. */
8562 if (s->size == 0)
8563 s->size += htab->plt_header_size;
8564
8565 h->plt.offset = s->size;
8566
8567 /* If we will insert a Thumb trampoline before this PLT, leave room
8568 for it. */
8569 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
8570 {
8571 h->plt.offset += PLT_THUMB_STUB_SIZE;
8572 s->size += PLT_THUMB_STUB_SIZE;
8573 }
8574
8575 /* If this symbol is not defined in a regular file, and we are
8576 not generating a shared library, then set the symbol to this
8577 location in the .plt. This is required to make function
8578 pointers compare as equal between the normal executable and
8579 the shared library. */
8580 if (! info->shared
8581 && !h->def_regular)
8582 {
8583 h->root.u.def.section = s;
8584 h->root.u.def.value = h->plt.offset;
8585
8586 /* Make sure the function is not marked as Thumb, in case
8587 it is the target of an ABS32 relocation, which will
8588 point to the PLT entry. */
8589 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
8590 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8591 }
8592
8593 /* Make room for this entry. */
8594 s->size += htab->plt_entry_size;
8595
8596 if (!htab->symbian_p)
8597 {
8598 /* We also need to make an entry in the .got.plt section, which
8599 will be placed in the .got section by the linker script. */
8600 eh->plt_got_offset = htab->sgotplt->size;
8601 htab->sgotplt->size += 4;
8602 }
8603
8604 /* We also need to make an entry in the .rel(a).plt section. */
8605 htab->srelplt->size += RELOC_SIZE (htab);
8606
8607 /* VxWorks executables have a second set of relocations for
8608 each PLT entry. They go in a separate relocation section,
8609 which is processed by the kernel loader. */
8610 if (htab->vxworks_p && !info->shared)
8611 {
8612 /* There is a relocation for the initial PLT entry:
8613 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
8614 if (h->plt.offset == htab->plt_header_size)
8615 htab->srelplt2->size += RELOC_SIZE (htab);
8616
8617 /* There are two extra relocations for each subsequent
8618 PLT entry: an R_ARM_32 relocation for the GOT entry,
8619 and an R_ARM_32 relocation for the PLT entry. */
8620 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
8621 }
8622 }
8623 else
8624 {
8625 h->plt.offset = (bfd_vma) -1;
8626 h->needs_plt = 0;
8627 }
8628 }
8629 else
8630 {
8631 h->plt.offset = (bfd_vma) -1;
8632 h->needs_plt = 0;
8633 }
8634
8635 if (h->got.refcount > 0)
8636 {
8637 asection *s;
8638 bfd_boolean dyn;
8639 int tls_type = elf32_arm_hash_entry (h)->tls_type;
8640 int indx;
8641
8642 /* Make sure this symbol is output as a dynamic symbol.
8643 Undefined weak syms won't yet be marked as dynamic. */
8644 if (h->dynindx == -1
8645 && !h->forced_local)
8646 {
8647 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8648 return FALSE;
8649 }
8650
8651 if (!htab->symbian_p)
8652 {
8653 s = htab->sgot;
8654 h->got.offset = s->size;
8655
8656 if (tls_type == GOT_UNKNOWN)
8657 abort ();
8658
8659 if (tls_type == GOT_NORMAL)
8660 /* Non-TLS symbols need one GOT slot. */
8661 s->size += 4;
8662 else
8663 {
8664 if (tls_type & GOT_TLS_GD)
8665 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
8666 s->size += 8;
8667 if (tls_type & GOT_TLS_IE)
8668 /* R_ARM_TLS_IE32 needs one GOT slot. */
8669 s->size += 4;
8670 }
8671
8672 dyn = htab->root.dynamic_sections_created;
8673
8674 indx = 0;
8675 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8676 && (!info->shared
8677 || !SYMBOL_REFERENCES_LOCAL (info, h)))
8678 indx = h->dynindx;
8679
8680 if (tls_type != GOT_NORMAL
8681 && (info->shared || indx != 0)
8682 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8683 || h->root.type != bfd_link_hash_undefweak))
8684 {
8685 if (tls_type & GOT_TLS_IE)
8686 htab->srelgot->size += RELOC_SIZE (htab);
8687
8688 if (tls_type & GOT_TLS_GD)
8689 htab->srelgot->size += RELOC_SIZE (htab);
8690
8691 if ((tls_type & GOT_TLS_GD) && indx != 0)
8692 htab->srelgot->size += RELOC_SIZE (htab);
8693 }
8694 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8695 || h->root.type != bfd_link_hash_undefweak)
8696 && (info->shared
8697 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
8698 htab->srelgot->size += RELOC_SIZE (htab);
8699 }
8700 }
8701 else
8702 h->got.offset = (bfd_vma) -1;
8703
8704 /* Allocate stubs for exported Thumb functions on v4t. */
8705 if (!htab->use_blx && h->dynindx != -1
8706 && h->def_regular
8707 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
8708 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
8709 {
8710 struct elf_link_hash_entry * th;
8711 struct bfd_link_hash_entry * bh;
8712 struct elf_link_hash_entry * myh;
8713 char name[1024];
8714 asection *s;
8715 bh = NULL;
8716 /* Create a new symbol to regist the real location of the function. */
8717 s = h->root.u.def.section;
8718 sprintf(name, "__real_%s", h->root.root.string);
8719 _bfd_generic_link_add_one_symbol (info, s->owner,
8720 name, BSF_GLOBAL, s,
8721 h->root.u.def.value,
8722 NULL, TRUE, FALSE, &bh);
8723
8724 myh = (struct elf_link_hash_entry *) bh;
8725 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
8726 myh->forced_local = 1;
8727 eh->export_glue = myh;
8728 th = record_arm_to_thumb_glue (info, h);
8729 /* Point the symbol at the stub. */
8730 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8731 h->root.u.def.section = th->root.u.def.section;
8732 h->root.u.def.value = th->root.u.def.value & ~1;
8733 }
8734
8735 if (eh->relocs_copied == NULL)
8736 return TRUE;
8737
8738 /* In the shared -Bsymbolic case, discard space allocated for
8739 dynamic pc-relative relocs against symbols which turn out to be
8740 defined in regular objects. For the normal shared case, discard
8741 space for pc-relative relocs that have become local due to symbol
8742 visibility changes. */
8743
8744 if (info->shared || htab->root.is_relocatable_executable)
8745 {
8746 /* The only reloc thats uses pc_count are R_ARM_REL32 and
8747 R_ARM_REL32_NOI, which will appear on something like
8748 ".long foo - .". We want calls to protected symbols to resolve
8749 directly to the function rather than going via the plt. If people
8750 want function pointer comparisons to work as expected then they
8751 should avoid writing assembly like ".long foo - .". */
8752 if (SYMBOL_CALLS_LOCAL (info, h))
8753 {
8754 struct elf32_arm_relocs_copied **pp;
8755
8756 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
8757 {
8758 p->count -= p->pc_count;
8759 p->pc_count = 0;
8760 if (p->count == 0)
8761 *pp = p->next;
8762 else
8763 pp = &p->next;
8764 }
8765 }
8766
8767 /* Also discard relocs on undefined weak syms with non-default
8768 visibility. */
8769 if (eh->relocs_copied != NULL
8770 && h->root.type == bfd_link_hash_undefweak)
8771 {
8772 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8773 eh->relocs_copied = NULL;
8774
8775 /* Make sure undefined weak symbols are output as a dynamic
8776 symbol in PIEs. */
8777 else if (h->dynindx == -1
8778 && !h->forced_local)
8779 {
8780 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8781 return FALSE;
8782 }
8783 }
8784
8785 else if (htab->root.is_relocatable_executable && h->dynindx == -1
8786 && h->root.type == bfd_link_hash_new)
8787 {
8788 /* Output absolute symbols so that we can create relocations
8789 against them. For normal symbols we output a relocation
8790 against the section that contains them. */
8791 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8792 return FALSE;
8793 }
8794
8795 }
8796 else
8797 {
8798 /* For the non-shared case, discard space for relocs against
8799 symbols which turn out to need copy relocs or are not
8800 dynamic. */
8801
8802 if (!h->non_got_ref
8803 && ((h->def_dynamic
8804 && !h->def_regular)
8805 || (htab->root.dynamic_sections_created
8806 && (h->root.type == bfd_link_hash_undefweak
8807 || h->root.type == bfd_link_hash_undefined))))
8808 {
8809 /* Make sure this symbol is output as a dynamic symbol.
8810 Undefined weak syms won't yet be marked as dynamic. */
8811 if (h->dynindx == -1
8812 && !h->forced_local)
8813 {
8814 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8815 return FALSE;
8816 }
8817
8818 /* If that succeeded, we know we'll be keeping all the
8819 relocs. */
8820 if (h->dynindx != -1)
8821 goto keep;
8822 }
8823
8824 eh->relocs_copied = NULL;
8825
8826 keep: ;
8827 }
8828
8829 /* Finally, allocate space. */
8830 for (p = eh->relocs_copied; p != NULL; p = p->next)
8831 {
8832 asection *sreloc = elf_section_data (p->section)->sreloc;
8833 sreloc->size += p->count * RELOC_SIZE (htab);
8834 }
8835
8836 return TRUE;
8837 }
8838
8839 /* Find any dynamic relocs that apply to read-only sections. */
8840
8841 static bfd_boolean
8842 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
8843 {
8844 struct elf32_arm_link_hash_entry *eh;
8845 struct elf32_arm_relocs_copied *p;
8846
8847 if (h->root.type == bfd_link_hash_warning)
8848 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8849
8850 eh = (struct elf32_arm_link_hash_entry *) h;
8851 for (p = eh->relocs_copied; p != NULL; p = p->next)
8852 {
8853 asection *s = p->section;
8854
8855 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8856 {
8857 struct bfd_link_info *info = (struct bfd_link_info *) inf;
8858
8859 info->flags |= DF_TEXTREL;
8860
8861 /* Not an error, just cut short the traversal. */
8862 return FALSE;
8863 }
8864 }
8865 return TRUE;
8866 }
8867
8868 void
8869 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
8870 int byteswap_code)
8871 {
8872 struct elf32_arm_link_hash_table *globals;
8873
8874 globals = elf32_arm_hash_table (info);
8875 globals->byteswap_code = byteswap_code;
8876 }
8877
8878 /* Set the sizes of the dynamic sections. */
8879
8880 static bfd_boolean
8881 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
8882 struct bfd_link_info * info)
8883 {
8884 bfd * dynobj;
8885 asection * s;
8886 bfd_boolean plt;
8887 bfd_boolean relocs;
8888 bfd *ibfd;
8889 struct elf32_arm_link_hash_table *htab;
8890
8891 htab = elf32_arm_hash_table (info);
8892 dynobj = elf_hash_table (info)->dynobj;
8893 BFD_ASSERT (dynobj != NULL);
8894 check_use_blx (htab);
8895
8896 if (elf_hash_table (info)->dynamic_sections_created)
8897 {
8898 /* Set the contents of the .interp section to the interpreter. */
8899 if (info->executable)
8900 {
8901 s = bfd_get_section_by_name (dynobj, ".interp");
8902 BFD_ASSERT (s != NULL);
8903 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8904 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8905 }
8906 }
8907
8908 /* Set up .got offsets for local syms, and space for local dynamic
8909 relocs. */
8910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8911 {
8912 bfd_signed_vma *local_got;
8913 bfd_signed_vma *end_local_got;
8914 char *local_tls_type;
8915 bfd_size_type locsymcount;
8916 Elf_Internal_Shdr *symtab_hdr;
8917 asection *srel;
8918
8919 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
8920 continue;
8921
8922 for (s = ibfd->sections; s != NULL; s = s->next)
8923 {
8924 struct elf32_arm_relocs_copied *p;
8925
8926 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8927 {
8928 if (!bfd_is_abs_section (p->section)
8929 && bfd_is_abs_section (p->section->output_section))
8930 {
8931 /* Input section has been discarded, either because
8932 it is a copy of a linkonce section or due to
8933 linker script /DISCARD/, so we'll be discarding
8934 the relocs too. */
8935 }
8936 else if (p->count != 0)
8937 {
8938 srel = elf_section_data (p->section)->sreloc;
8939 srel->size += p->count * RELOC_SIZE (htab);
8940 if ((p->section->output_section->flags & SEC_READONLY) != 0)
8941 info->flags |= DF_TEXTREL;
8942 }
8943 }
8944 }
8945
8946 local_got = elf_local_got_refcounts (ibfd);
8947 if (!local_got)
8948 continue;
8949
8950 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
8951 locsymcount = symtab_hdr->sh_info;
8952 end_local_got = local_got + locsymcount;
8953 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
8954 s = htab->sgot;
8955 srel = htab->srelgot;
8956 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
8957 {
8958 if (*local_got > 0)
8959 {
8960 *local_got = s->size;
8961 if (*local_tls_type & GOT_TLS_GD)
8962 /* TLS_GD relocs need an 8-byte structure in the GOT. */
8963 s->size += 8;
8964 if (*local_tls_type & GOT_TLS_IE)
8965 s->size += 4;
8966 if (*local_tls_type == GOT_NORMAL)
8967 s->size += 4;
8968
8969 if (info->shared || *local_tls_type == GOT_TLS_GD)
8970 srel->size += RELOC_SIZE (htab);
8971 }
8972 else
8973 *local_got = (bfd_vma) -1;
8974 }
8975 }
8976
8977 if (htab->tls_ldm_got.refcount > 0)
8978 {
8979 /* Allocate two GOT entries and one dynamic relocation (if necessary)
8980 for R_ARM_TLS_LDM32 relocations. */
8981 htab->tls_ldm_got.offset = htab->sgot->size;
8982 htab->sgot->size += 8;
8983 if (info->shared)
8984 htab->srelgot->size += RELOC_SIZE (htab);
8985 }
8986 else
8987 htab->tls_ldm_got.offset = -1;
8988
8989 /* Allocate global sym .plt and .got entries, and space for global
8990 sym dynamic relocs. */
8991 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
8992
8993 /* Here we rummage through the found bfds to collect glue information. */
8994 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8995 {
8996 /* Initialise mapping tables for code/data. */
8997 bfd_elf32_arm_init_maps (ibfd);
8998
8999 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
9000 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
9001 /* xgettext:c-format */
9002 _bfd_error_handler (_("Errors encountered processing file %s"),
9003 ibfd->filename);
9004 }
9005
9006 /* The check_relocs and adjust_dynamic_symbol entry points have
9007 determined the sizes of the various dynamic sections. Allocate
9008 memory for them. */
9009 plt = FALSE;
9010 relocs = FALSE;
9011 for (s = dynobj->sections; s != NULL; s = s->next)
9012 {
9013 const char * name;
9014
9015 if ((s->flags & SEC_LINKER_CREATED) == 0)
9016 continue;
9017
9018 /* It's OK to base decisions on the section name, because none
9019 of the dynobj section names depend upon the input files. */
9020 name = bfd_get_section_name (dynobj, s);
9021
9022 if (strcmp (name, ".plt") == 0)
9023 {
9024 /* Remember whether there is a PLT. */
9025 plt = s->size != 0;
9026 }
9027 else if (CONST_STRNEQ (name, ".rel"))
9028 {
9029 if (s->size != 0)
9030 {
9031 /* Remember whether there are any reloc sections other
9032 than .rel(a).plt and .rela.plt.unloaded. */
9033 if (s != htab->srelplt && s != htab->srelplt2)
9034 relocs = TRUE;
9035
9036 /* We use the reloc_count field as a counter if we need
9037 to copy relocs into the output file. */
9038 s->reloc_count = 0;
9039 }
9040 }
9041 else if (! CONST_STRNEQ (name, ".got")
9042 && strcmp (name, ".dynbss") != 0)
9043 {
9044 /* It's not one of our sections, so don't allocate space. */
9045 continue;
9046 }
9047
9048 if (s->size == 0)
9049 {
9050 /* If we don't need this section, strip it from the
9051 output file. This is mostly to handle .rel(a).bss and
9052 .rel(a).plt. We must create both sections in
9053 create_dynamic_sections, because they must be created
9054 before the linker maps input sections to output
9055 sections. The linker does that before
9056 adjust_dynamic_symbol is called, and it is that
9057 function which decides whether anything needs to go
9058 into these sections. */
9059 s->flags |= SEC_EXCLUDE;
9060 continue;
9061 }
9062
9063 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9064 continue;
9065
9066 /* Allocate memory for the section contents. */
9067 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
9068 if (s->contents == NULL)
9069 return FALSE;
9070 }
9071
9072 if (elf_hash_table (info)->dynamic_sections_created)
9073 {
9074 /* Add some entries to the .dynamic section. We fill in the
9075 values later, in elf32_arm_finish_dynamic_sections, but we
9076 must add the entries now so that we get the correct size for
9077 the .dynamic section. The DT_DEBUG entry is filled in by the
9078 dynamic linker and used by the debugger. */
9079 #define add_dynamic_entry(TAG, VAL) \
9080 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9081
9082 if (info->executable)
9083 {
9084 if (!add_dynamic_entry (DT_DEBUG, 0))
9085 return FALSE;
9086 }
9087
9088 if (plt)
9089 {
9090 if ( !add_dynamic_entry (DT_PLTGOT, 0)
9091 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9092 || !add_dynamic_entry (DT_PLTREL,
9093 htab->use_rel ? DT_REL : DT_RELA)
9094 || !add_dynamic_entry (DT_JMPREL, 0))
9095 return FALSE;
9096 }
9097
9098 if (relocs)
9099 {
9100 if (htab->use_rel)
9101 {
9102 if (!add_dynamic_entry (DT_REL, 0)
9103 || !add_dynamic_entry (DT_RELSZ, 0)
9104 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
9105 return FALSE;
9106 }
9107 else
9108 {
9109 if (!add_dynamic_entry (DT_RELA, 0)
9110 || !add_dynamic_entry (DT_RELASZ, 0)
9111 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
9112 return FALSE;
9113 }
9114 }
9115
9116 /* If any dynamic relocs apply to a read-only section,
9117 then we need a DT_TEXTREL entry. */
9118 if ((info->flags & DF_TEXTREL) == 0)
9119 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
9120 (PTR) info);
9121
9122 if ((info->flags & DF_TEXTREL) != 0)
9123 {
9124 if (!add_dynamic_entry (DT_TEXTREL, 0))
9125 return FALSE;
9126 }
9127 }
9128 #undef add_dynamic_entry
9129
9130 return TRUE;
9131 }
9132
9133 /* Finish up dynamic symbol handling. We set the contents of various
9134 dynamic sections here. */
9135
9136 static bfd_boolean
9137 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
9138 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
9139 {
9140 bfd * dynobj;
9141 struct elf32_arm_link_hash_table *htab;
9142 struct elf32_arm_link_hash_entry *eh;
9143
9144 dynobj = elf_hash_table (info)->dynobj;
9145 htab = elf32_arm_hash_table (info);
9146 eh = (struct elf32_arm_link_hash_entry *) h;
9147
9148 if (h->plt.offset != (bfd_vma) -1)
9149 {
9150 asection * splt;
9151 asection * srel;
9152 bfd_byte *loc;
9153 bfd_vma plt_index;
9154 Elf_Internal_Rela rel;
9155
9156 /* This symbol has an entry in the procedure linkage table. Set
9157 it up. */
9158
9159 BFD_ASSERT (h->dynindx != -1);
9160
9161 splt = bfd_get_section_by_name (dynobj, ".plt");
9162 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
9163 BFD_ASSERT (splt != NULL && srel != NULL);
9164
9165 /* Fill in the entry in the procedure linkage table. */
9166 if (htab->symbian_p)
9167 {
9168 put_arm_insn (htab, output_bfd,
9169 elf32_arm_symbian_plt_entry[0],
9170 splt->contents + h->plt.offset);
9171 bfd_put_32 (output_bfd,
9172 elf32_arm_symbian_plt_entry[1],
9173 splt->contents + h->plt.offset + 4);
9174
9175 /* Fill in the entry in the .rel.plt section. */
9176 rel.r_offset = (splt->output_section->vma
9177 + splt->output_offset
9178 + h->plt.offset + 4);
9179 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
9180
9181 /* Get the index in the procedure linkage table which
9182 corresponds to this symbol. This is the index of this symbol
9183 in all the symbols for which we are making plt entries. The
9184 first entry in the procedure linkage table is reserved. */
9185 plt_index = ((h->plt.offset - htab->plt_header_size)
9186 / htab->plt_entry_size);
9187 }
9188 else
9189 {
9190 bfd_vma got_offset, got_address, plt_address;
9191 bfd_vma got_displacement;
9192 asection * sgot;
9193 bfd_byte * ptr;
9194
9195 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
9196 BFD_ASSERT (sgot != NULL);
9197
9198 /* Get the offset into the .got.plt table of the entry that
9199 corresponds to this function. */
9200 got_offset = eh->plt_got_offset;
9201
9202 /* Get the index in the procedure linkage table which
9203 corresponds to this symbol. This is the index of this symbol
9204 in all the symbols for which we are making plt entries. The
9205 first three entries in .got.plt are reserved; after that
9206 symbols appear in the same order as in .plt. */
9207 plt_index = (got_offset - 12) / 4;
9208
9209 /* Calculate the address of the GOT entry. */
9210 got_address = (sgot->output_section->vma
9211 + sgot->output_offset
9212 + got_offset);
9213
9214 /* ...and the address of the PLT entry. */
9215 plt_address = (splt->output_section->vma
9216 + splt->output_offset
9217 + h->plt.offset);
9218
9219 ptr = htab->splt->contents + h->plt.offset;
9220 if (htab->vxworks_p && info->shared)
9221 {
9222 unsigned int i;
9223 bfd_vma val;
9224
9225 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
9226 {
9227 val = elf32_arm_vxworks_shared_plt_entry[i];
9228 if (i == 2)
9229 val |= got_address - sgot->output_section->vma;
9230 if (i == 5)
9231 val |= plt_index * RELOC_SIZE (htab);
9232 if (i == 2 || i == 5)
9233 bfd_put_32 (output_bfd, val, ptr);
9234 else
9235 put_arm_insn (htab, output_bfd, val, ptr);
9236 }
9237 }
9238 else if (htab->vxworks_p)
9239 {
9240 unsigned int i;
9241 bfd_vma val;
9242
9243 for (i = 0; i != htab->plt_entry_size / 4; i++)
9244 {
9245 val = elf32_arm_vxworks_exec_plt_entry[i];
9246 if (i == 2)
9247 val |= got_address;
9248 if (i == 4)
9249 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
9250 if (i == 5)
9251 val |= plt_index * RELOC_SIZE (htab);
9252 if (i == 2 || i == 5)
9253 bfd_put_32 (output_bfd, val, ptr);
9254 else
9255 put_arm_insn (htab, output_bfd, val, ptr);
9256 }
9257
9258 loc = (htab->srelplt2->contents
9259 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
9260
9261 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
9262 referencing the GOT for this PLT entry. */
9263 rel.r_offset = plt_address + 8;
9264 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9265 rel.r_addend = got_offset;
9266 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9267 loc += RELOC_SIZE (htab);
9268
9269 /* Create the R_ARM_ABS32 relocation referencing the
9270 beginning of the PLT for this GOT entry. */
9271 rel.r_offset = got_address;
9272 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9273 rel.r_addend = 0;
9274 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9275 }
9276 else
9277 {
9278 /* Calculate the displacement between the PLT slot and the
9279 entry in the GOT. The eight-byte offset accounts for the
9280 value produced by adding to pc in the first instruction
9281 of the PLT stub. */
9282 got_displacement = got_address - (plt_address + 8);
9283
9284 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
9285
9286 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
9287 {
9288 put_thumb_insn (htab, output_bfd,
9289 elf32_arm_plt_thumb_stub[0], ptr - 4);
9290 put_thumb_insn (htab, output_bfd,
9291 elf32_arm_plt_thumb_stub[1], ptr - 2);
9292 }
9293
9294 put_arm_insn (htab, output_bfd,
9295 elf32_arm_plt_entry[0]
9296 | ((got_displacement & 0x0ff00000) >> 20),
9297 ptr + 0);
9298 put_arm_insn (htab, output_bfd,
9299 elf32_arm_plt_entry[1]
9300 | ((got_displacement & 0x000ff000) >> 12),
9301 ptr+ 4);
9302 put_arm_insn (htab, output_bfd,
9303 elf32_arm_plt_entry[2]
9304 | (got_displacement & 0x00000fff),
9305 ptr + 8);
9306 #ifdef FOUR_WORD_PLT
9307 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
9308 #endif
9309 }
9310
9311 /* Fill in the entry in the global offset table. */
9312 bfd_put_32 (output_bfd,
9313 (splt->output_section->vma
9314 + splt->output_offset),
9315 sgot->contents + got_offset);
9316
9317 /* Fill in the entry in the .rel(a).plt section. */
9318 rel.r_addend = 0;
9319 rel.r_offset = got_address;
9320 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
9321 }
9322
9323 loc = srel->contents + plt_index * RELOC_SIZE (htab);
9324 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9325
9326 if (!h->def_regular)
9327 {
9328 /* Mark the symbol as undefined, rather than as defined in
9329 the .plt section. Leave the value alone. */
9330 sym->st_shndx = SHN_UNDEF;
9331 /* If the symbol is weak, we do need to clear the value.
9332 Otherwise, the PLT entry would provide a definition for
9333 the symbol even if the symbol wasn't defined anywhere,
9334 and so the symbol would never be NULL. */
9335 if (!h->ref_regular_nonweak)
9336 sym->st_value = 0;
9337 }
9338 }
9339
9340 if (h->got.offset != (bfd_vma) -1
9341 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
9342 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
9343 {
9344 asection * sgot;
9345 asection * srel;
9346 Elf_Internal_Rela rel;
9347 bfd_byte *loc;
9348 bfd_vma offset;
9349
9350 /* This symbol has an entry in the global offset table. Set it
9351 up. */
9352 sgot = bfd_get_section_by_name (dynobj, ".got");
9353 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
9354 BFD_ASSERT (sgot != NULL && srel != NULL);
9355
9356 offset = (h->got.offset & ~(bfd_vma) 1);
9357 rel.r_addend = 0;
9358 rel.r_offset = (sgot->output_section->vma
9359 + sgot->output_offset
9360 + offset);
9361
9362 /* If this is a static link, or it is a -Bsymbolic link and the
9363 symbol is defined locally or was forced to be local because
9364 of a version file, we just want to emit a RELATIVE reloc.
9365 The entry in the global offset table will already have been
9366 initialized in the relocate_section function. */
9367 if (info->shared
9368 && SYMBOL_REFERENCES_LOCAL (info, h))
9369 {
9370 BFD_ASSERT((h->got.offset & 1) != 0);
9371 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
9372 if (!htab->use_rel)
9373 {
9374 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
9375 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
9376 }
9377 }
9378 else
9379 {
9380 BFD_ASSERT((h->got.offset & 1) == 0);
9381 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
9382 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
9383 }
9384
9385 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
9386 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9387 }
9388
9389 if (h->needs_copy)
9390 {
9391 asection * s;
9392 Elf_Internal_Rela rel;
9393 bfd_byte *loc;
9394
9395 /* This symbol needs a copy reloc. Set it up. */
9396 BFD_ASSERT (h->dynindx != -1
9397 && (h->root.type == bfd_link_hash_defined
9398 || h->root.type == bfd_link_hash_defweak));
9399
9400 s = bfd_get_section_by_name (h->root.u.def.section->owner,
9401 RELOC_SECTION (htab, ".bss"));
9402 BFD_ASSERT (s != NULL);
9403
9404 rel.r_addend = 0;
9405 rel.r_offset = (h->root.u.def.value
9406 + h->root.u.def.section->output_section->vma
9407 + h->root.u.def.section->output_offset);
9408 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
9409 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
9410 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9411 }
9412
9413 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
9414 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
9415 to the ".got" section. */
9416 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
9417 || (!htab->vxworks_p && h == htab->root.hgot))
9418 sym->st_shndx = SHN_ABS;
9419
9420 return TRUE;
9421 }
9422
9423 /* Finish up the dynamic sections. */
9424
9425 static bfd_boolean
9426 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
9427 {
9428 bfd * dynobj;
9429 asection * sgot;
9430 asection * sdyn;
9431
9432 dynobj = elf_hash_table (info)->dynobj;
9433
9434 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
9435 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
9436 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
9437
9438 if (elf_hash_table (info)->dynamic_sections_created)
9439 {
9440 asection *splt;
9441 Elf32_External_Dyn *dyncon, *dynconend;
9442 struct elf32_arm_link_hash_table *htab;
9443
9444 htab = elf32_arm_hash_table (info);
9445 splt = bfd_get_section_by_name (dynobj, ".plt");
9446 BFD_ASSERT (splt != NULL && sdyn != NULL);
9447
9448 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9449 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9450
9451 for (; dyncon < dynconend; dyncon++)
9452 {
9453 Elf_Internal_Dyn dyn;
9454 const char * name;
9455 asection * s;
9456
9457 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9458
9459 switch (dyn.d_tag)
9460 {
9461 unsigned int type;
9462
9463 default:
9464 break;
9465
9466 case DT_HASH:
9467 name = ".hash";
9468 goto get_vma_if_bpabi;
9469 case DT_STRTAB:
9470 name = ".dynstr";
9471 goto get_vma_if_bpabi;
9472 case DT_SYMTAB:
9473 name = ".dynsym";
9474 goto get_vma_if_bpabi;
9475 case DT_VERSYM:
9476 name = ".gnu.version";
9477 goto get_vma_if_bpabi;
9478 case DT_VERDEF:
9479 name = ".gnu.version_d";
9480 goto get_vma_if_bpabi;
9481 case DT_VERNEED:
9482 name = ".gnu.version_r";
9483 goto get_vma_if_bpabi;
9484
9485 case DT_PLTGOT:
9486 name = ".got";
9487 goto get_vma;
9488 case DT_JMPREL:
9489 name = RELOC_SECTION (htab, ".plt");
9490 get_vma:
9491 s = bfd_get_section_by_name (output_bfd, name);
9492 BFD_ASSERT (s != NULL);
9493 if (!htab->symbian_p)
9494 dyn.d_un.d_ptr = s->vma;
9495 else
9496 /* In the BPABI, tags in the PT_DYNAMIC section point
9497 at the file offset, not the memory address, for the
9498 convenience of the post linker. */
9499 dyn.d_un.d_ptr = s->filepos;
9500 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9501 break;
9502
9503 get_vma_if_bpabi:
9504 if (htab->symbian_p)
9505 goto get_vma;
9506 break;
9507
9508 case DT_PLTRELSZ:
9509 s = bfd_get_section_by_name (output_bfd,
9510 RELOC_SECTION (htab, ".plt"));
9511 BFD_ASSERT (s != NULL);
9512 dyn.d_un.d_val = s->size;
9513 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9514 break;
9515
9516 case DT_RELSZ:
9517 case DT_RELASZ:
9518 if (!htab->symbian_p)
9519 {
9520 /* My reading of the SVR4 ABI indicates that the
9521 procedure linkage table relocs (DT_JMPREL) should be
9522 included in the overall relocs (DT_REL). This is
9523 what Solaris does. However, UnixWare can not handle
9524 that case. Therefore, we override the DT_RELSZ entry
9525 here to make it not include the JMPREL relocs. Since
9526 the linker script arranges for .rel(a).plt to follow all
9527 other relocation sections, we don't have to worry
9528 about changing the DT_REL entry. */
9529 s = bfd_get_section_by_name (output_bfd,
9530 RELOC_SECTION (htab, ".plt"));
9531 if (s != NULL)
9532 dyn.d_un.d_val -= s->size;
9533 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9534 break;
9535 }
9536 /* Fall through */
9537
9538 case DT_REL:
9539 case DT_RELA:
9540 /* In the BPABI, the DT_REL tag must point at the file
9541 offset, not the VMA, of the first relocation
9542 section. So, we use code similar to that in
9543 elflink.c, but do not check for SHF_ALLOC on the
9544 relcoation section, since relocations sections are
9545 never allocated under the BPABI. The comments above
9546 about Unixware notwithstanding, we include all of the
9547 relocations here. */
9548 if (htab->symbian_p)
9549 {
9550 unsigned int i;
9551 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
9552 ? SHT_REL : SHT_RELA);
9553 dyn.d_un.d_val = 0;
9554 for (i = 1; i < elf_numsections (output_bfd); i++)
9555 {
9556 Elf_Internal_Shdr *hdr
9557 = elf_elfsections (output_bfd)[i];
9558 if (hdr->sh_type == type)
9559 {
9560 if (dyn.d_tag == DT_RELSZ
9561 || dyn.d_tag == DT_RELASZ)
9562 dyn.d_un.d_val += hdr->sh_size;
9563 else if ((ufile_ptr) hdr->sh_offset
9564 <= dyn.d_un.d_val - 1)
9565 dyn.d_un.d_val = hdr->sh_offset;
9566 }
9567 }
9568 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9569 }
9570 break;
9571
9572 /* Set the bottom bit of DT_INIT/FINI if the
9573 corresponding function is Thumb. */
9574 case DT_INIT:
9575 name = info->init_function;
9576 goto get_sym;
9577 case DT_FINI:
9578 name = info->fini_function;
9579 get_sym:
9580 /* If it wasn't set by elf_bfd_final_link
9581 then there is nothing to adjust. */
9582 if (dyn.d_un.d_val != 0)
9583 {
9584 struct elf_link_hash_entry * eh;
9585
9586 eh = elf_link_hash_lookup (elf_hash_table (info), name,
9587 FALSE, FALSE, TRUE);
9588 if (eh != (struct elf_link_hash_entry *) NULL
9589 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
9590 {
9591 dyn.d_un.d_val |= 1;
9592 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9593 }
9594 }
9595 break;
9596 }
9597 }
9598
9599 /* Fill in the first entry in the procedure linkage table. */
9600 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
9601 {
9602 const bfd_vma *plt0_entry;
9603 bfd_vma got_address, plt_address, got_displacement;
9604
9605 /* Calculate the addresses of the GOT and PLT. */
9606 got_address = sgot->output_section->vma + sgot->output_offset;
9607 plt_address = splt->output_section->vma + splt->output_offset;
9608
9609 if (htab->vxworks_p)
9610 {
9611 /* The VxWorks GOT is relocated by the dynamic linker.
9612 Therefore, we must emit relocations rather than simply
9613 computing the values now. */
9614 Elf_Internal_Rela rel;
9615
9616 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
9617 put_arm_insn (htab, output_bfd, plt0_entry[0],
9618 splt->contents + 0);
9619 put_arm_insn (htab, output_bfd, plt0_entry[1],
9620 splt->contents + 4);
9621 put_arm_insn (htab, output_bfd, plt0_entry[2],
9622 splt->contents + 8);
9623 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
9624
9625 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
9626 rel.r_offset = plt_address + 12;
9627 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9628 rel.r_addend = 0;
9629 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
9630 htab->srelplt2->contents);
9631 }
9632 else
9633 {
9634 got_displacement = got_address - (plt_address + 16);
9635
9636 plt0_entry = elf32_arm_plt0_entry;
9637 put_arm_insn (htab, output_bfd, plt0_entry[0],
9638 splt->contents + 0);
9639 put_arm_insn (htab, output_bfd, plt0_entry[1],
9640 splt->contents + 4);
9641 put_arm_insn (htab, output_bfd, plt0_entry[2],
9642 splt->contents + 8);
9643 put_arm_insn (htab, output_bfd, plt0_entry[3],
9644 splt->contents + 12);
9645
9646 #ifdef FOUR_WORD_PLT
9647 /* The displacement value goes in the otherwise-unused
9648 last word of the second entry. */
9649 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
9650 #else
9651 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
9652 #endif
9653 }
9654 }
9655
9656 /* UnixWare sets the entsize of .plt to 4, although that doesn't
9657 really seem like the right value. */
9658 if (splt->output_section->owner == output_bfd)
9659 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
9660
9661 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
9662 {
9663 /* Correct the .rel(a).plt.unloaded relocations. They will have
9664 incorrect symbol indexes. */
9665 int num_plts;
9666 unsigned char *p;
9667
9668 num_plts = ((htab->splt->size - htab->plt_header_size)
9669 / htab->plt_entry_size);
9670 p = htab->srelplt2->contents + RELOC_SIZE (htab);
9671
9672 for (; num_plts; num_plts--)
9673 {
9674 Elf_Internal_Rela rel;
9675
9676 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9677 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9678 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9679 p += RELOC_SIZE (htab);
9680
9681 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9682 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9683 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9684 p += RELOC_SIZE (htab);
9685 }
9686 }
9687 }
9688
9689 /* Fill in the first three entries in the global offset table. */
9690 if (sgot)
9691 {
9692 if (sgot->size > 0)
9693 {
9694 if (sdyn == NULL)
9695 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
9696 else
9697 bfd_put_32 (output_bfd,
9698 sdyn->output_section->vma + sdyn->output_offset,
9699 sgot->contents);
9700 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
9701 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
9702 }
9703
9704 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
9705 }
9706
9707 return TRUE;
9708 }
9709
9710 static void
9711 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9712 {
9713 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9714 struct elf32_arm_link_hash_table *globals;
9715
9716 i_ehdrp = elf_elfheader (abfd);
9717
9718 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
9719 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
9720 else
9721 i_ehdrp->e_ident[EI_OSABI] = 0;
9722 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
9723
9724 if (link_info)
9725 {
9726 globals = elf32_arm_hash_table (link_info);
9727 if (globals->byteswap_code)
9728 i_ehdrp->e_flags |= EF_ARM_BE8;
9729 }
9730 }
9731
9732 static enum elf_reloc_type_class
9733 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
9734 {
9735 switch ((int) ELF32_R_TYPE (rela->r_info))
9736 {
9737 case R_ARM_RELATIVE:
9738 return reloc_class_relative;
9739 case R_ARM_JUMP_SLOT:
9740 return reloc_class_plt;
9741 case R_ARM_COPY:
9742 return reloc_class_copy;
9743 default:
9744 return reloc_class_normal;
9745 }
9746 }
9747
9748 /* Set the right machine number for an Arm ELF file. */
9749
9750 static bfd_boolean
9751 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
9752 {
9753 if (hdr->sh_type == SHT_NOTE)
9754 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
9755
9756 return TRUE;
9757 }
9758
9759 static void
9760 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
9761 {
9762 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
9763 }
9764
9765 /* Return TRUE if this is an unwinding table entry. */
9766
9767 static bfd_boolean
9768 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
9769 {
9770 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
9771 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
9772 }
9773
9774
9775 /* Set the type and flags for an ARM section. We do this by
9776 the section name, which is a hack, but ought to work. */
9777
9778 static bfd_boolean
9779 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
9780 {
9781 const char * name;
9782
9783 name = bfd_get_section_name (abfd, sec);
9784
9785 if (is_arm_elf_unwind_section_name (abfd, name))
9786 {
9787 hdr->sh_type = SHT_ARM_EXIDX;
9788 hdr->sh_flags |= SHF_LINK_ORDER;
9789 }
9790 else if (strcmp(name, ".ARM.attributes") == 0)
9791 {
9792 hdr->sh_type = SHT_ARM_ATTRIBUTES;
9793 }
9794 return TRUE;
9795 }
9796
9797 /* Parse an Arm EABI attributes section. */
9798 static void
9799 elf32_arm_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr)
9800 {
9801 bfd_byte *contents;
9802 bfd_byte *p;
9803 bfd_vma len;
9804
9805 contents = bfd_malloc (hdr->sh_size);
9806 if (!contents)
9807 return;
9808 if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
9809 hdr->sh_size))
9810 {
9811 free (contents);
9812 return;
9813 }
9814 p = contents;
9815 if (*(p++) == 'A')
9816 {
9817 len = hdr->sh_size - 1;
9818 while (len > 0)
9819 {
9820 int namelen;
9821 bfd_vma section_len;
9822
9823 section_len = bfd_get_32 (abfd, p);
9824 p += 4;
9825 if (section_len > len)
9826 section_len = len;
9827 len -= section_len;
9828 namelen = strlen ((char *)p) + 1;
9829 section_len -= namelen + 4;
9830 if (strcmp((char *)p, "aeabi") != 0)
9831 {
9832 /* Vendor section. Ignore it. */
9833 p += namelen + section_len;
9834 }
9835 else
9836 {
9837 p += namelen;
9838 while (section_len > 0)
9839 {
9840 int tag;
9841 unsigned int n;
9842 unsigned int val;
9843 bfd_vma subsection_len;
9844 bfd_byte *end;
9845
9846 tag = read_unsigned_leb128 (abfd, p, &n);
9847 p += n;
9848 subsection_len = bfd_get_32 (abfd, p);
9849 p += 4;
9850 if (subsection_len > section_len)
9851 subsection_len = section_len;
9852 section_len -= subsection_len;
9853 subsection_len -= n + 4;
9854 end = p + subsection_len;
9855 switch (tag)
9856 {
9857 case Tag_File:
9858 while (p < end)
9859 {
9860 bfd_boolean is_string;
9861
9862 tag = read_unsigned_leb128 (abfd, p, &n);
9863 p += n;
9864 if (tag == 4 || tag == 5)
9865 is_string = 1;
9866 else if (tag < 32)
9867 is_string = 0;
9868 else
9869 is_string = (tag & 1) != 0;
9870 if (tag == Tag_compatibility)
9871 {
9872 val = read_unsigned_leb128 (abfd, p, &n);
9873 p += n;
9874 elf32_arm_add_eabi_attr_compat (abfd, val,
9875 (char *)p);
9876 p += strlen ((char *)p) + 1;
9877 }
9878 else if (is_string)
9879 {
9880 elf32_arm_add_eabi_attr_string (abfd, tag,
9881 (char *)p);
9882 p += strlen ((char *)p) + 1;
9883 }
9884 else
9885 {
9886 val = read_unsigned_leb128 (abfd, p, &n);
9887 p += n;
9888 elf32_arm_add_eabi_attr_int (abfd, tag, val);
9889 }
9890 }
9891 break;
9892 case Tag_Section:
9893 case Tag_Symbol:
9894 /* Don't have anywhere convenient to attach these.
9895 Fall through for now. */
9896 default:
9897 /* Ignore things we don't kow about. */
9898 p += subsection_len;
9899 subsection_len = 0;
9900 break;
9901 }
9902 }
9903 }
9904 }
9905 }
9906 free (contents);
9907 }
9908
9909 /* Handle an ARM specific section when reading an object file. This is
9910 called when bfd_section_from_shdr finds a section with an unknown
9911 type. */
9912
9913 static bfd_boolean
9914 elf32_arm_section_from_shdr (bfd *abfd,
9915 Elf_Internal_Shdr * hdr,
9916 const char *name,
9917 int shindex)
9918 {
9919 /* There ought to be a place to keep ELF backend specific flags, but
9920 at the moment there isn't one. We just keep track of the
9921 sections by their name, instead. Fortunately, the ABI gives
9922 names for all the ARM specific sections, so we will probably get
9923 away with this. */
9924 switch (hdr->sh_type)
9925 {
9926 case SHT_ARM_EXIDX:
9927 case SHT_ARM_PREEMPTMAP:
9928 case SHT_ARM_ATTRIBUTES:
9929 break;
9930
9931 default:
9932 return FALSE;
9933 }
9934
9935 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
9936 return FALSE;
9937
9938 if (hdr->sh_type == SHT_ARM_ATTRIBUTES)
9939 elf32_arm_parse_attributes(abfd, hdr);
9940 return TRUE;
9941 }
9942
9943 /* A structure used to record a list of sections, independently
9944 of the next and prev fields in the asection structure. */
9945 typedef struct section_list
9946 {
9947 asection * sec;
9948 struct section_list * next;
9949 struct section_list * prev;
9950 }
9951 section_list;
9952
9953 /* Unfortunately we need to keep a list of sections for which
9954 an _arm_elf_section_data structure has been allocated. This
9955 is because it is possible for functions like elf32_arm_write_section
9956 to be called on a section which has had an elf_data_structure
9957 allocated for it (and so the used_by_bfd field is valid) but
9958 for which the ARM extended version of this structure - the
9959 _arm_elf_section_data structure - has not been allocated. */
9960 static section_list * sections_with_arm_elf_section_data = NULL;
9961
9962 static void
9963 record_section_with_arm_elf_section_data (asection * sec)
9964 {
9965 struct section_list * entry;
9966
9967 entry = bfd_malloc (sizeof (* entry));
9968 if (entry == NULL)
9969 return;
9970 entry->sec = sec;
9971 entry->next = sections_with_arm_elf_section_data;
9972 entry->prev = NULL;
9973 if (entry->next != NULL)
9974 entry->next->prev = entry;
9975 sections_with_arm_elf_section_data = entry;
9976 }
9977
9978 static struct section_list *
9979 find_arm_elf_section_entry (asection * sec)
9980 {
9981 struct section_list * entry;
9982 static struct section_list * last_entry = NULL;
9983
9984 /* This is a short cut for the typical case where the sections are added
9985 to the sections_with_arm_elf_section_data list in forward order and
9986 then looked up here in backwards order. This makes a real difference
9987 to the ld-srec/sec64k.exp linker test. */
9988 entry = sections_with_arm_elf_section_data;
9989 if (last_entry != NULL)
9990 {
9991 if (last_entry->sec == sec)
9992 entry = last_entry;
9993 else if (last_entry->next != NULL
9994 && last_entry->next->sec == sec)
9995 entry = last_entry->next;
9996 }
9997
9998 for (; entry; entry = entry->next)
9999 if (entry->sec == sec)
10000 break;
10001
10002 if (entry)
10003 /* Record the entry prior to this one - it is the entry we are most
10004 likely to want to locate next time. Also this way if we have been
10005 called from unrecord_section_with_arm_elf_section_data() we will not
10006 be caching a pointer that is about to be freed. */
10007 last_entry = entry->prev;
10008
10009 return entry;
10010 }
10011
10012 static _arm_elf_section_data *
10013 get_arm_elf_section_data (asection * sec)
10014 {
10015 struct section_list * entry;
10016
10017 entry = find_arm_elf_section_entry (sec);
10018
10019 if (entry)
10020 return elf32_arm_section_data (entry->sec);
10021 else
10022 return NULL;
10023 }
10024
10025 static void
10026 unrecord_section_with_arm_elf_section_data (asection * sec)
10027 {
10028 struct section_list * entry;
10029
10030 entry = find_arm_elf_section_entry (sec);
10031
10032 if (entry)
10033 {
10034 if (entry->prev != NULL)
10035 entry->prev->next = entry->next;
10036 if (entry->next != NULL)
10037 entry->next->prev = entry->prev;
10038 if (entry == sections_with_arm_elf_section_data)
10039 sections_with_arm_elf_section_data = entry->next;
10040 free (entry);
10041 }
10042 }
10043
10044
10045 typedef struct
10046 {
10047 void *finfo;
10048 struct bfd_link_info *info;
10049 int plt_shndx;
10050 bfd_vma plt_offset;
10051 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
10052 asection *, struct elf_link_hash_entry *);
10053 } output_arch_syminfo;
10054
10055 enum map_symbol_type
10056 {
10057 ARM_MAP_ARM,
10058 ARM_MAP_THUMB,
10059 ARM_MAP_DATA
10060 };
10061
10062
10063 /* Output a single PLT mapping symbol. */
10064
10065 static bfd_boolean
10066 elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi,
10067 enum map_symbol_type type,
10068 bfd_vma offset)
10069 {
10070 static const char *names[3] = {"$a", "$t", "$d"};
10071 struct elf32_arm_link_hash_table *htab;
10072 Elf_Internal_Sym sym;
10073
10074 htab = elf32_arm_hash_table (osi->info);
10075 sym.st_value = osi->plt_offset + offset;
10076 sym.st_size = 0;
10077 sym.st_other = 0;
10078 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
10079 sym.st_shndx = osi->plt_shndx;
10080 if (!osi->func (osi->finfo, names[type], &sym, htab->splt, NULL))
10081 return FALSE;
10082 return TRUE;
10083 }
10084
10085
10086 /* Output mapping symbols for PLT entries associated with H. */
10087
10088 static bfd_boolean
10089 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
10090 {
10091 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
10092 struct elf32_arm_link_hash_table *htab;
10093 struct elf32_arm_link_hash_entry *eh;
10094 bfd_vma addr;
10095
10096 htab = elf32_arm_hash_table (osi->info);
10097
10098 if (h->root.type == bfd_link_hash_indirect)
10099 return TRUE;
10100
10101 if (h->root.type == bfd_link_hash_warning)
10102 /* When warning symbols are created, they **replace** the "real"
10103 entry in the hash table, thus we never get to see the real
10104 symbol in a hash traversal. So look at it now. */
10105 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10106
10107 if (h->plt.offset == (bfd_vma) -1)
10108 return TRUE;
10109
10110 eh = (struct elf32_arm_link_hash_entry *) h;
10111 addr = h->plt.offset;
10112 if (htab->symbian_p)
10113 {
10114 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
10115 return FALSE;
10116 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4))
10117 return FALSE;
10118 }
10119 else if (htab->vxworks_p)
10120 {
10121 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
10122 return FALSE;
10123 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8))
10124 return FALSE;
10125 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12))
10126 return FALSE;
10127 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20))
10128 return FALSE;
10129 }
10130 else
10131 {
10132 bfd_boolean thumb_stub;
10133
10134 thumb_stub = eh->plt_thumb_refcount > 0 && !htab->use_blx;
10135 if (thumb_stub)
10136 {
10137 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4))
10138 return FALSE;
10139 }
10140 #ifdef FOUR_WORD_PLT
10141 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
10142 return FALSE;
10143 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12))
10144 return FALSE;
10145 #else
10146 /* A three-word PLT with no Thumb thunk contains only Arm code,
10147 so only need to output a mapping symbol for the first PLT entry and
10148 entries with thumb thunks. */
10149 if (thumb_stub || addr == 20)
10150 {
10151 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
10152 return FALSE;
10153 }
10154 #endif
10155 }
10156
10157 return TRUE;
10158 }
10159
10160
10161 /* Output mapping symbols for the PLT. */
10162
10163 static bfd_boolean
10164 elf32_arm_output_arch_local_syms (bfd *output_bfd,
10165 struct bfd_link_info *info,
10166 void *finfo, bfd_boolean (*func) (void *, const char *,
10167 Elf_Internal_Sym *,
10168 asection *,
10169 struct elf_link_hash_entry *))
10170 {
10171 output_arch_syminfo osi;
10172 struct elf32_arm_link_hash_table *htab;
10173
10174 htab = elf32_arm_hash_table (info);
10175 if (!htab->splt || htab->splt->size == 0)
10176 return TRUE;
10177
10178 check_use_blx(htab);
10179 osi.finfo = finfo;
10180 osi.info = info;
10181 osi.func = func;
10182 osi.plt_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
10183 htab->splt->output_section);
10184 osi.plt_offset = htab->splt->output_section->vma;
10185
10186 /* Output mapping symbols for the plt header. SymbianOS does not have a
10187 plt header. */
10188 if (htab->vxworks_p)
10189 {
10190 /* VxWorks shared libraries have no PLT header. */
10191 if (!info->shared)
10192 {
10193 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
10194 return FALSE;
10195 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12))
10196 return FALSE;
10197 }
10198 }
10199 else if (!htab->symbian_p)
10200 {
10201 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
10202 return FALSE;
10203 #ifndef FOUR_WORD_PLT
10204 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16))
10205 return FALSE;
10206 #endif
10207 }
10208
10209 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
10210 return TRUE;
10211 }
10212
10213 /* Allocate target specific section data. */
10214
10215 static bfd_boolean
10216 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
10217 {
10218 if (!sec->used_by_bfd)
10219 {
10220 _arm_elf_section_data *sdata;
10221 bfd_size_type amt = sizeof (*sdata);
10222
10223 sdata = bfd_zalloc (abfd, amt);
10224 if (sdata == NULL)
10225 return FALSE;
10226 sec->used_by_bfd = sdata;
10227 }
10228
10229 record_section_with_arm_elf_section_data (sec);
10230
10231 return _bfd_elf_new_section_hook (abfd, sec);
10232 }
10233
10234
10235 /* Used to order a list of mapping symbols by address. */
10236
10237 static int
10238 elf32_arm_compare_mapping (const void * a, const void * b)
10239 {
10240 return ((const elf32_arm_section_map *) a)->vma
10241 > ((const elf32_arm_section_map *) b)->vma;
10242 }
10243
10244
10245 /* Do code byteswapping. Return FALSE afterwards so that the section is
10246 written out as normal. */
10247
10248 static bfd_boolean
10249 elf32_arm_write_section (bfd *output_bfd,
10250 struct bfd_link_info *link_info, asection *sec,
10251 bfd_byte *contents)
10252 {
10253 int mapcount, errcount;
10254 _arm_elf_section_data *arm_data;
10255 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
10256 elf32_arm_section_map *map;
10257 elf32_vfp11_erratum_list *errnode;
10258 bfd_vma ptr;
10259 bfd_vma end;
10260 bfd_vma offset = sec->output_section->vma + sec->output_offset;
10261 bfd_byte tmp;
10262 int i;
10263
10264 /* If this section has not been allocated an _arm_elf_section_data
10265 structure then we cannot record anything. */
10266 arm_data = get_arm_elf_section_data (sec);
10267 if (arm_data == NULL)
10268 return FALSE;
10269
10270 mapcount = arm_data->mapcount;
10271 map = arm_data->map;
10272 errcount = arm_data->erratumcount;
10273
10274 if (errcount != 0)
10275 {
10276 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
10277
10278 for (errnode = arm_data->erratumlist; errnode != 0;
10279 errnode = errnode->next)
10280 {
10281 bfd_vma index = errnode->vma - offset;
10282
10283 switch (errnode->type)
10284 {
10285 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
10286 {
10287 bfd_vma branch_to_veneer;
10288 /* Original condition code of instruction, plus bit mask for
10289 ARM B instruction. */
10290 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
10291 | 0x0a000000;
10292
10293 /* The instruction is before the label. */
10294 index -= 4;
10295
10296 /* Above offset included in -4 below. */
10297 branch_to_veneer = errnode->u.b.veneer->vma
10298 - errnode->vma - 4;
10299
10300 if ((signed) branch_to_veneer < -(1 << 25)
10301 || (signed) branch_to_veneer >= (1 << 25))
10302 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
10303 "range"), output_bfd);
10304
10305 insn |= (branch_to_veneer >> 2) & 0xffffff;
10306 contents[endianflip ^ index] = insn & 0xff;
10307 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
10308 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
10309 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
10310 }
10311 break;
10312
10313 case VFP11_ERRATUM_ARM_VENEER:
10314 {
10315 bfd_vma branch_from_veneer;
10316 unsigned int insn;
10317
10318 /* Take size of veneer into account. */
10319 branch_from_veneer = errnode->u.v.branch->vma
10320 - errnode->vma - 12;
10321
10322 if ((signed) branch_from_veneer < -(1 << 25)
10323 || (signed) branch_from_veneer >= (1 << 25))
10324 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
10325 "range"), output_bfd);
10326
10327 /* Original instruction. */
10328 insn = errnode->u.v.branch->u.b.vfp_insn;
10329 contents[endianflip ^ index] = insn & 0xff;
10330 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
10331 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
10332 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
10333
10334 /* Branch back to insn after original insn. */
10335 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
10336 contents[endianflip ^ (index + 4)] = insn & 0xff;
10337 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
10338 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
10339 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
10340 }
10341 break;
10342
10343 default:
10344 abort ();
10345 }
10346 }
10347 }
10348
10349 if (mapcount == 0)
10350 return FALSE;
10351
10352 if (globals->byteswap_code)
10353 {
10354 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
10355
10356 ptr = map[0].vma;
10357 for (i = 0; i < mapcount; i++)
10358 {
10359 if (i == mapcount - 1)
10360 end = sec->size;
10361 else
10362 end = map[i + 1].vma;
10363
10364 switch (map[i].type)
10365 {
10366 case 'a':
10367 /* Byte swap code words. */
10368 while (ptr + 3 < end)
10369 {
10370 tmp = contents[ptr];
10371 contents[ptr] = contents[ptr + 3];
10372 contents[ptr + 3] = tmp;
10373 tmp = contents[ptr + 1];
10374 contents[ptr + 1] = contents[ptr + 2];
10375 contents[ptr + 2] = tmp;
10376 ptr += 4;
10377 }
10378 break;
10379
10380 case 't':
10381 /* Byte swap code halfwords. */
10382 while (ptr + 1 < end)
10383 {
10384 tmp = contents[ptr];
10385 contents[ptr] = contents[ptr + 1];
10386 contents[ptr + 1] = tmp;
10387 ptr += 2;
10388 }
10389 break;
10390
10391 case 'd':
10392 /* Leave data alone. */
10393 break;
10394 }
10395 ptr = end;
10396 }
10397 }
10398
10399 free (map);
10400 arm_data->mapcount = 0;
10401 arm_data->mapsize = 0;
10402 arm_data->map = NULL;
10403 unrecord_section_with_arm_elf_section_data (sec);
10404
10405 return FALSE;
10406 }
10407
10408 static void
10409 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
10410 asection * sec,
10411 void * ignore ATTRIBUTE_UNUSED)
10412 {
10413 unrecord_section_with_arm_elf_section_data (sec);
10414 }
10415
10416 static bfd_boolean
10417 elf32_arm_close_and_cleanup (bfd * abfd)
10418 {
10419 if (abfd->sections)
10420 bfd_map_over_sections (abfd,
10421 unrecord_section_via_map_over_sections,
10422 NULL);
10423
10424 return _bfd_elf_close_and_cleanup (abfd);
10425 }
10426
10427 static bfd_boolean
10428 elf32_arm_bfd_free_cached_info (bfd * abfd)
10429 {
10430 if (abfd->sections)
10431 bfd_map_over_sections (abfd,
10432 unrecord_section_via_map_over_sections,
10433 NULL);
10434
10435 return _bfd_free_cached_info (abfd);
10436 }
10437
10438 /* Display STT_ARM_TFUNC symbols as functions. */
10439
10440 static void
10441 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
10442 asymbol *asym)
10443 {
10444 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
10445
10446 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
10447 elfsym->symbol.flags |= BSF_FUNCTION;
10448 }
10449
10450
10451 /* Mangle thumb function symbols as we read them in. */
10452
10453 static bfd_boolean
10454 elf32_arm_swap_symbol_in (bfd * abfd,
10455 const void *psrc,
10456 const void *pshn,
10457 Elf_Internal_Sym *dst)
10458 {
10459 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
10460 return FALSE;
10461
10462 /* New EABI objects mark thumb function symbols by setting the low bit of
10463 the address. Turn these into STT_ARM_TFUNC. */
10464 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
10465 && (dst->st_value & 1))
10466 {
10467 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
10468 dst->st_value &= ~(bfd_vma) 1;
10469 }
10470 return TRUE;
10471 }
10472
10473
10474 /* Mangle thumb function symbols as we write them out. */
10475
10476 static void
10477 elf32_arm_swap_symbol_out (bfd *abfd,
10478 const Elf_Internal_Sym *src,
10479 void *cdst,
10480 void *shndx)
10481 {
10482 Elf_Internal_Sym newsym;
10483
10484 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
10485 of the address set, as per the new EABI. We do this unconditionally
10486 because objcopy does not set the elf header flags until after
10487 it writes out the symbol table. */
10488 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
10489 {
10490 newsym = *src;
10491 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
10492 if (newsym.st_shndx != SHN_UNDEF)
10493 {
10494 /* Do this only for defined symbols. At link type, the static
10495 linker will simulate the work of dynamic linker of resolving
10496 symbols and will carry over the thumbness of found symbols to
10497 the output symbol table. It's not clear how it happens, but
10498 the thumbness of undefined symbols can well be different at
10499 runtime, and writing '1' for them will be confusing for users
10500 and possibly for dynamic linker itself.
10501 */
10502 newsym.st_value |= 1;
10503 }
10504
10505 src = &newsym;
10506 }
10507 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
10508 }
10509
10510 /* Add the PT_ARM_EXIDX program header. */
10511
10512 static bfd_boolean
10513 elf32_arm_modify_segment_map (bfd *abfd,
10514 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10515 {
10516 struct elf_segment_map *m;
10517 asection *sec;
10518
10519 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10520 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10521 {
10522 /* If there is already a PT_ARM_EXIDX header, then we do not
10523 want to add another one. This situation arises when running
10524 "strip"; the input binary already has the header. */
10525 m = elf_tdata (abfd)->segment_map;
10526 while (m && m->p_type != PT_ARM_EXIDX)
10527 m = m->next;
10528 if (!m)
10529 {
10530 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
10531 if (m == NULL)
10532 return FALSE;
10533 m->p_type = PT_ARM_EXIDX;
10534 m->count = 1;
10535 m->sections[0] = sec;
10536
10537 m->next = elf_tdata (abfd)->segment_map;
10538 elf_tdata (abfd)->segment_map = m;
10539 }
10540 }
10541
10542 return TRUE;
10543 }
10544
10545 /* We may add a PT_ARM_EXIDX program header. */
10546
10547 static int
10548 elf32_arm_additional_program_headers (bfd *abfd,
10549 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10550 {
10551 asection *sec;
10552
10553 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10554 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10555 return 1;
10556 else
10557 return 0;
10558 }
10559
10560 /* We use this to override swap_symbol_in and swap_symbol_out. */
10561 const struct elf_size_info elf32_arm_size_info = {
10562 sizeof (Elf32_External_Ehdr),
10563 sizeof (Elf32_External_Phdr),
10564 sizeof (Elf32_External_Shdr),
10565 sizeof (Elf32_External_Rel),
10566 sizeof (Elf32_External_Rela),
10567 sizeof (Elf32_External_Sym),
10568 sizeof (Elf32_External_Dyn),
10569 sizeof (Elf_External_Note),
10570 4,
10571 1,
10572 32, 2,
10573 ELFCLASS32, EV_CURRENT,
10574 bfd_elf32_write_out_phdrs,
10575 bfd_elf32_write_shdrs_and_ehdr,
10576 bfd_elf32_write_relocs,
10577 elf32_arm_swap_symbol_in,
10578 elf32_arm_swap_symbol_out,
10579 bfd_elf32_slurp_reloc_table,
10580 bfd_elf32_slurp_symbol_table,
10581 bfd_elf32_swap_dyn_in,
10582 bfd_elf32_swap_dyn_out,
10583 bfd_elf32_swap_reloc_in,
10584 bfd_elf32_swap_reloc_out,
10585 bfd_elf32_swap_reloca_in,
10586 bfd_elf32_swap_reloca_out
10587 };
10588
10589 #define ELF_ARCH bfd_arch_arm
10590 #define ELF_MACHINE_CODE EM_ARM
10591 #ifdef __QNXTARGET__
10592 #define ELF_MAXPAGESIZE 0x1000
10593 #else
10594 #define ELF_MAXPAGESIZE 0x8000
10595 #endif
10596 #define ELF_MINPAGESIZE 0x1000
10597 #define ELF_COMMONPAGESIZE 0x1000
10598
10599 #define bfd_elf32_mkobject elf32_arm_mkobject
10600
10601 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
10602 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
10603 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
10604 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
10605 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
10606 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
10607 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
10608 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
10609 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
10610 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
10611 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
10612 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
10613 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
10614 #define bfd_elf32_bfd_final_link elf32_arm_bfd_final_link
10615
10616 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
10617 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
10618 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
10619 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
10620 #define elf_backend_check_relocs elf32_arm_check_relocs
10621 #define elf_backend_relocate_section elf32_arm_relocate_section
10622 #define elf_backend_write_section elf32_arm_write_section
10623 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
10624 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
10625 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
10626 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
10627 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
10628 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
10629 #define elf_backend_post_process_headers elf32_arm_post_process_headers
10630 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
10631 #define elf_backend_object_p elf32_arm_object_p
10632 #define elf_backend_section_flags elf32_arm_section_flags
10633 #define elf_backend_fake_sections elf32_arm_fake_sections
10634 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
10635 #define elf_backend_final_write_processing elf32_arm_final_write_processing
10636 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
10637 #define elf_backend_symbol_processing elf32_arm_symbol_processing
10638 #define elf_backend_size_info elf32_arm_size_info
10639 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
10640 #define elf_backend_additional_program_headers \
10641 elf32_arm_additional_program_headers
10642 #define elf_backend_output_arch_local_syms \
10643 elf32_arm_output_arch_local_syms
10644 #define elf_backend_begin_write_processing \
10645 elf32_arm_begin_write_processing
10646
10647 #define elf_backend_can_refcount 1
10648 #define elf_backend_can_gc_sections 1
10649 #define elf_backend_plt_readonly 1
10650 #define elf_backend_want_got_plt 1
10651 #define elf_backend_want_plt_sym 0
10652 #define elf_backend_may_use_rel_p 1
10653 #define elf_backend_may_use_rela_p 0
10654 #define elf_backend_default_use_rela_p 0
10655
10656 #define elf_backend_got_header_size 12
10657
10658 #include "elf32-target.h"
10659
10660 /* VxWorks Targets */
10661
10662 #undef TARGET_LITTLE_SYM
10663 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
10664 #undef TARGET_LITTLE_NAME
10665 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
10666 #undef TARGET_BIG_SYM
10667 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
10668 #undef TARGET_BIG_NAME
10669 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
10670
10671 /* Like elf32_arm_link_hash_table_create -- but overrides
10672 appropriately for VxWorks. */
10673 static struct bfd_link_hash_table *
10674 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
10675 {
10676 struct bfd_link_hash_table *ret;
10677
10678 ret = elf32_arm_link_hash_table_create (abfd);
10679 if (ret)
10680 {
10681 struct elf32_arm_link_hash_table *htab
10682 = (struct elf32_arm_link_hash_table *) ret;
10683 htab->use_rel = 0;
10684 htab->vxworks_p = 1;
10685 }
10686 return ret;
10687 }
10688
10689 static void
10690 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10691 {
10692 elf32_arm_final_write_processing (abfd, linker);
10693 elf_vxworks_final_write_processing (abfd, linker);
10694 }
10695
10696 #undef elf32_bed
10697 #define elf32_bed elf32_arm_vxworks_bed
10698
10699 #undef bfd_elf32_bfd_link_hash_table_create
10700 #define bfd_elf32_bfd_link_hash_table_create \
10701 elf32_arm_vxworks_link_hash_table_create
10702 #undef elf_backend_add_symbol_hook
10703 #define elf_backend_add_symbol_hook \
10704 elf_vxworks_add_symbol_hook
10705 #undef elf_backend_final_write_processing
10706 #define elf_backend_final_write_processing \
10707 elf32_arm_vxworks_final_write_processing
10708 #undef elf_backend_emit_relocs
10709 #define elf_backend_emit_relocs \
10710 elf_vxworks_emit_relocs
10711
10712 #undef elf_backend_may_use_rel_p
10713 #define elf_backend_may_use_rel_p 0
10714 #undef elf_backend_may_use_rela_p
10715 #define elf_backend_may_use_rela_p 1
10716 #undef elf_backend_default_use_rela_p
10717 #define elf_backend_default_use_rela_p 1
10718 #undef elf_backend_want_plt_sym
10719 #define elf_backend_want_plt_sym 1
10720 #undef ELF_MAXPAGESIZE
10721 #define ELF_MAXPAGESIZE 0x1000
10722
10723 #include "elf32-target.h"
10724
10725
10726 /* Symbian OS Targets */
10727
10728 #undef TARGET_LITTLE_SYM
10729 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
10730 #undef TARGET_LITTLE_NAME
10731 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
10732 #undef TARGET_BIG_SYM
10733 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
10734 #undef TARGET_BIG_NAME
10735 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
10736
10737 /* Like elf32_arm_link_hash_table_create -- but overrides
10738 appropriately for Symbian OS. */
10739 static struct bfd_link_hash_table *
10740 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
10741 {
10742 struct bfd_link_hash_table *ret;
10743
10744 ret = elf32_arm_link_hash_table_create (abfd);
10745 if (ret)
10746 {
10747 struct elf32_arm_link_hash_table *htab
10748 = (struct elf32_arm_link_hash_table *)ret;
10749 /* There is no PLT header for Symbian OS. */
10750 htab->plt_header_size = 0;
10751 /* The PLT entries are each three instructions. */
10752 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
10753 htab->symbian_p = 1;
10754 /* Symbian uses armv5t or above, so use_blx is always true. */
10755 htab->use_blx = 1;
10756 htab->root.is_relocatable_executable = 1;
10757 }
10758 return ret;
10759 }
10760
10761 static const struct bfd_elf_special_section
10762 elf32_arm_symbian_special_sections[] =
10763 {
10764 /* In a BPABI executable, the dynamic linking sections do not go in
10765 the loadable read-only segment. The post-linker may wish to
10766 refer to these sections, but they are not part of the final
10767 program image. */
10768 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
10769 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
10770 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
10771 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
10772 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
10773 /* These sections do not need to be writable as the SymbianOS
10774 postlinker will arrange things so that no dynamic relocation is
10775 required. */
10776 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
10777 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
10778 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
10779 { NULL, 0, 0, 0, 0 }
10780 };
10781
10782 static void
10783 elf32_arm_symbian_begin_write_processing (bfd *abfd,
10784 struct bfd_link_info *link_info)
10785 {
10786 /* BPABI objects are never loaded directly by an OS kernel; they are
10787 processed by a postlinker first, into an OS-specific format. If
10788 the D_PAGED bit is set on the file, BFD will align segments on
10789 page boundaries, so that an OS can directly map the file. With
10790 BPABI objects, that just results in wasted space. In addition,
10791 because we clear the D_PAGED bit, map_sections_to_segments will
10792 recognize that the program headers should not be mapped into any
10793 loadable segment. */
10794 abfd->flags &= ~D_PAGED;
10795 elf32_arm_begin_write_processing(abfd, link_info);
10796 }
10797
10798 static bfd_boolean
10799 elf32_arm_symbian_modify_segment_map (bfd *abfd,
10800 struct bfd_link_info *info)
10801 {
10802 struct elf_segment_map *m;
10803 asection *dynsec;
10804
10805 /* BPABI shared libraries and executables should have a PT_DYNAMIC
10806 segment. However, because the .dynamic section is not marked
10807 with SEC_LOAD, the generic ELF code will not create such a
10808 segment. */
10809 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
10810 if (dynsec)
10811 {
10812 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
10813 if (m->p_type == PT_DYNAMIC)
10814 break;
10815
10816 if (m == NULL)
10817 {
10818 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
10819 m->next = elf_tdata (abfd)->segment_map;
10820 elf_tdata (abfd)->segment_map = m;
10821 }
10822 }
10823
10824 /* Also call the generic arm routine. */
10825 return elf32_arm_modify_segment_map (abfd, info);
10826 }
10827
10828 #undef elf32_bed
10829 #define elf32_bed elf32_arm_symbian_bed
10830
10831 /* The dynamic sections are not allocated on SymbianOS; the postlinker
10832 will process them and then discard them. */
10833 #undef ELF_DYNAMIC_SEC_FLAGS
10834 #define ELF_DYNAMIC_SEC_FLAGS \
10835 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
10836
10837 #undef bfd_elf32_bfd_link_hash_table_create
10838 #define bfd_elf32_bfd_link_hash_table_create \
10839 elf32_arm_symbian_link_hash_table_create
10840 #undef elf_backend_add_symbol_hook
10841
10842 #undef elf_backend_special_sections
10843 #define elf_backend_special_sections elf32_arm_symbian_special_sections
10844
10845 #undef elf_backend_begin_write_processing
10846 #define elf_backend_begin_write_processing \
10847 elf32_arm_symbian_begin_write_processing
10848 #undef elf_backend_final_write_processing
10849 #define elf_backend_final_write_processing \
10850 elf32_arm_final_write_processing
10851 #undef elf_backend_emit_relocs
10852
10853 #undef elf_backend_modify_segment_map
10854 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
10855
10856 /* There is no .got section for BPABI objects, and hence no header. */
10857 #undef elf_backend_got_header_size
10858 #define elf_backend_got_header_size 0
10859
10860 /* Similarly, there is no .got.plt section. */
10861 #undef elf_backend_want_got_plt
10862 #define elf_backend_want_got_plt 0
10863
10864 #undef elf_backend_may_use_rel_p
10865 #define elf_backend_may_use_rel_p 1
10866 #undef elf_backend_may_use_rela_p
10867 #define elf_backend_may_use_rela_p 0
10868 #undef elf_backend_default_use_rela_p
10869 #define elf_backend_default_use_rela_p 0
10870 #undef elf_backend_want_plt_sym
10871 #define elf_backend_want_plt_sym 0
10872 #undef ELF_MAXPAGESIZE
10873 #define ELF_MAXPAGESIZE 0x8000
10874
10875 #include "elf32-target.h"
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