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* doc/Makefile.am (AM_MAKEINFOFLAGS, TEXI2DVI): Include
[binutils.git] / bfd / elf32-arm.c
blobef066d3a79e6f5bd7176bc866522fcad18d2166a
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libiberty.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf-vxworks.h"
28 #include "elf/arm.h"
29
30 #ifndef NUM_ELEM
31 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
32 #endif
33
34 /* Return the relocation section associated with NAME. HTAB is the
35 bfd's elf32_arm_link_hash_entry. */
36 #define RELOC_SECTION(HTAB, NAME) \
37 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
38
39 /* Return size of a relocation entry. HTAB is the bfd's
40 elf32_arm_link_hash_entry. */
41 #define RELOC_SIZE(HTAB) \
42 ((HTAB)->use_rel \
43 ? sizeof (Elf32_External_Rel) \
44 : sizeof (Elf32_External_Rela))
45
46 /* Return function to swap relocations in. HTAB is the bfd's
47 elf32_arm_link_hash_entry. */
48 #define SWAP_RELOC_IN(HTAB) \
49 ((HTAB)->use_rel \
50 ? bfd_elf32_swap_reloc_in \
51 : bfd_elf32_swap_reloca_in)
52
53 /* Return function to swap relocations out. HTAB is the bfd's
54 elf32_arm_link_hash_entry. */
55 #define SWAP_RELOC_OUT(HTAB) \
56 ((HTAB)->use_rel \
57 ? bfd_elf32_swap_reloc_out \
58 : bfd_elf32_swap_reloca_out)
59
60 #define elf_info_to_howto 0
61 #define elf_info_to_howto_rel elf32_arm_info_to_howto
62
63 #define ARM_ELF_ABI_VERSION 0
64 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
65
66 static struct elf_backend_data elf32_arm_vxworks_bed;
67
68 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
69 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
70 in that slot. */
71
72 static reloc_howto_type elf32_arm_howto_table_1[] =
73 {
74 /* No relocation */
75 HOWTO (R_ARM_NONE, /* type */
76 0, /* rightshift */
77 0, /* size (0 = byte, 1 = short, 2 = long) */
78 0, /* bitsize */
79 FALSE, /* pc_relative */
80 0, /* bitpos */
81 complain_overflow_dont,/* complain_on_overflow */
82 bfd_elf_generic_reloc, /* special_function */
83 "R_ARM_NONE", /* name */
84 FALSE, /* partial_inplace */
85 0, /* src_mask */
86 0, /* dst_mask */
87 FALSE), /* pcrel_offset */
88
89 HOWTO (R_ARM_PC24, /* type */
90 2, /* rightshift */
91 2, /* size (0 = byte, 1 = short, 2 = long) */
92 24, /* bitsize */
93 TRUE, /* pc_relative */
94 0, /* bitpos */
95 complain_overflow_signed,/* complain_on_overflow */
96 bfd_elf_generic_reloc, /* special_function */
97 "R_ARM_PC24", /* name */
98 FALSE, /* partial_inplace */
99 0x00ffffff, /* src_mask */
100 0x00ffffff, /* dst_mask */
101 TRUE), /* pcrel_offset */
102
103 /* 32 bit absolute */
104 HOWTO (R_ARM_ABS32, /* type */
105 0, /* rightshift */
106 2, /* size (0 = byte, 1 = short, 2 = long) */
107 32, /* bitsize */
108 FALSE, /* pc_relative */
109 0, /* bitpos */
110 complain_overflow_bitfield,/* complain_on_overflow */
111 bfd_elf_generic_reloc, /* special_function */
112 "R_ARM_ABS32", /* name */
113 FALSE, /* partial_inplace */
114 0xffffffff, /* src_mask */
115 0xffffffff, /* dst_mask */
116 FALSE), /* pcrel_offset */
117
118 /* standard 32bit pc-relative reloc */
119 HOWTO (R_ARM_REL32, /* type */
120 0, /* rightshift */
121 2, /* size (0 = byte, 1 = short, 2 = long) */
122 32, /* bitsize */
123 TRUE, /* pc_relative */
124 0, /* bitpos */
125 complain_overflow_bitfield,/* complain_on_overflow */
126 bfd_elf_generic_reloc, /* special_function */
127 "R_ARM_REL32", /* name */
128 FALSE, /* partial_inplace */
129 0xffffffff, /* src_mask */
130 0xffffffff, /* dst_mask */
131 TRUE), /* pcrel_offset */
132
133 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
134 HOWTO (R_ARM_LDR_PC_G0, /* type */
135 0, /* rightshift */
136 0, /* size (0 = byte, 1 = short, 2 = long) */
137 32, /* bitsize */
138 TRUE, /* pc_relative */
139 0, /* bitpos */
140 complain_overflow_dont,/* complain_on_overflow */
141 bfd_elf_generic_reloc, /* special_function */
142 "R_ARM_LDR_PC_G0", /* name */
143 FALSE, /* partial_inplace */
144 0xffffffff, /* src_mask */
145 0xffffffff, /* dst_mask */
146 TRUE), /* pcrel_offset */
147
148 /* 16 bit absolute */
149 HOWTO (R_ARM_ABS16, /* type */
150 0, /* rightshift */
151 1, /* size (0 = byte, 1 = short, 2 = long) */
152 16, /* bitsize */
153 FALSE, /* pc_relative */
154 0, /* bitpos */
155 complain_overflow_bitfield,/* complain_on_overflow */
156 bfd_elf_generic_reloc, /* special_function */
157 "R_ARM_ABS16", /* name */
158 FALSE, /* partial_inplace */
159 0x0000ffff, /* src_mask */
160 0x0000ffff, /* dst_mask */
161 FALSE), /* pcrel_offset */
162
163 /* 12 bit absolute */
164 HOWTO (R_ARM_ABS12, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 12, /* bitsize */
168 FALSE, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield,/* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_ARM_ABS12", /* name */
173 FALSE, /* partial_inplace */
174 0x00000fff, /* src_mask */
175 0x00000fff, /* dst_mask */
176 FALSE), /* pcrel_offset */
177
178 HOWTO (R_ARM_THM_ABS5, /* type */
179 6, /* rightshift */
180 1, /* size (0 = byte, 1 = short, 2 = long) */
181 5, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield,/* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_ARM_THM_ABS5", /* name */
187 FALSE, /* partial_inplace */
188 0x000007e0, /* src_mask */
189 0x000007e0, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* 8 bit absolute */
193 HOWTO (R_ARM_ABS8, /* type */
194 0, /* rightshift */
195 0, /* size (0 = byte, 1 = short, 2 = long) */
196 8, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_bitfield,/* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_ARM_ABS8", /* name */
202 FALSE, /* partial_inplace */
203 0x000000ff, /* src_mask */
204 0x000000ff, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 HOWTO (R_ARM_SBREL32, /* type */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 32, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont,/* complain_on_overflow */
214 bfd_elf_generic_reloc, /* special_function */
215 "R_ARM_SBREL32", /* name */
216 FALSE, /* partial_inplace */
217 0xffffffff, /* src_mask */
218 0xffffffff, /* dst_mask */
219 FALSE), /* pcrel_offset */
220
221 HOWTO (R_ARM_THM_CALL, /* type */
222 1, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 25, /* bitsize */
225 TRUE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_signed,/* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_ARM_THM_CALL", /* name */
230 FALSE, /* partial_inplace */
231 0x07ff07ff, /* src_mask */
232 0x07ff07ff, /* dst_mask */
233 TRUE), /* pcrel_offset */
234
235 HOWTO (R_ARM_THM_PC8, /* type */
236 1, /* rightshift */
237 1, /* size (0 = byte, 1 = short, 2 = long) */
238 8, /* bitsize */
239 TRUE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_signed,/* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_ARM_THM_PC8", /* name */
244 FALSE, /* partial_inplace */
245 0x000000ff, /* src_mask */
246 0x000000ff, /* dst_mask */
247 TRUE), /* pcrel_offset */
248
249 HOWTO (R_ARM_BREL_ADJ, /* type */
250 1, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 32, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_signed,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_ARM_BREL_ADJ", /* name */
258 FALSE, /* partial_inplace */
259 0xffffffff, /* src_mask */
260 0xffffffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 HOWTO (R_ARM_SWI24, /* type */
264 0, /* rightshift */
265 0, /* size (0 = byte, 1 = short, 2 = long) */
266 0, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_signed,/* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_ARM_SWI24", /* name */
272 FALSE, /* partial_inplace */
273 0x00000000, /* src_mask */
274 0x00000000, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 HOWTO (R_ARM_THM_SWI8, /* type */
278 0, /* rightshift */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_signed,/* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_ARM_SWI8", /* name */
286 FALSE, /* partial_inplace */
287 0x00000000, /* src_mask */
288 0x00000000, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* BLX instruction for the ARM. */
292 HOWTO (R_ARM_XPC25, /* type */
293 2, /* rightshift */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
295 25, /* bitsize */
296 TRUE, /* pc_relative */
297 0, /* bitpos */
298 complain_overflow_signed,/* complain_on_overflow */
299 bfd_elf_generic_reloc, /* special_function */
300 "R_ARM_XPC25", /* name */
301 FALSE, /* partial_inplace */
302 0x00ffffff, /* src_mask */
303 0x00ffffff, /* dst_mask */
304 TRUE), /* pcrel_offset */
305
306 /* BLX instruction for the Thumb. */
307 HOWTO (R_ARM_THM_XPC22, /* type */
308 2, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 22, /* bitsize */
311 TRUE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_signed,/* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_ARM_THM_XPC22", /* name */
316 FALSE, /* partial_inplace */
317 0x07ff07ff, /* src_mask */
318 0x07ff07ff, /* dst_mask */
319 TRUE), /* pcrel_offset */
320
321 /* Dynamic TLS relocations. */
322
323 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
324 0, /* rightshift */
325 2, /* size (0 = byte, 1 = short, 2 = long) */
326 32, /* bitsize */
327 FALSE, /* pc_relative */
328 0, /* bitpos */
329 complain_overflow_bitfield,/* complain_on_overflow */
330 bfd_elf_generic_reloc, /* special_function */
331 "R_ARM_TLS_DTPMOD32", /* name */
332 TRUE, /* partial_inplace */
333 0xffffffff, /* src_mask */
334 0xffffffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
336
337 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 32, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield,/* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_ARM_TLS_DTPOFF32", /* name */
346 TRUE, /* partial_inplace */
347 0xffffffff, /* src_mask */
348 0xffffffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 HOWTO (R_ARM_TLS_TPOFF32, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 32, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_bitfield,/* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_ARM_TLS_TPOFF32", /* name */
360 TRUE, /* partial_inplace */
361 0xffffffff, /* src_mask */
362 0xffffffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* Relocs used in ARM Linux */
366
367 HOWTO (R_ARM_COPY, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 32, /* bitsize */
371 FALSE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_bitfield,/* complain_on_overflow */
374 bfd_elf_generic_reloc, /* special_function */
375 "R_ARM_COPY", /* name */
376 TRUE, /* partial_inplace */
377 0xffffffff, /* src_mask */
378 0xffffffff, /* dst_mask */
379 FALSE), /* pcrel_offset */
380
381 HOWTO (R_ARM_GLOB_DAT, /* type */
382 0, /* rightshift */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
384 32, /* bitsize */
385 FALSE, /* pc_relative */
386 0, /* bitpos */
387 complain_overflow_bitfield,/* complain_on_overflow */
388 bfd_elf_generic_reloc, /* special_function */
389 "R_ARM_GLOB_DAT", /* name */
390 TRUE, /* partial_inplace */
391 0xffffffff, /* src_mask */
392 0xffffffff, /* dst_mask */
393 FALSE), /* pcrel_offset */
394
395 HOWTO (R_ARM_JUMP_SLOT, /* type */
396 0, /* rightshift */
397 2, /* size (0 = byte, 1 = short, 2 = long) */
398 32, /* bitsize */
399 FALSE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_bitfield,/* complain_on_overflow */
402 bfd_elf_generic_reloc, /* special_function */
403 "R_ARM_JUMP_SLOT", /* name */
404 TRUE, /* partial_inplace */
405 0xffffffff, /* src_mask */
406 0xffffffff, /* dst_mask */
407 FALSE), /* pcrel_offset */
408
409 HOWTO (R_ARM_RELATIVE, /* type */
410 0, /* rightshift */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
412 32, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_bitfield,/* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_ARM_RELATIVE", /* name */
418 TRUE, /* partial_inplace */
419 0xffffffff, /* src_mask */
420 0xffffffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 HOWTO (R_ARM_GOTOFF32, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield,/* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_ARM_GOTOFF32", /* name */
432 TRUE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 HOWTO (R_ARM_GOTPC, /* type */
438 0, /* rightshift */
439 2, /* size (0 = byte, 1 = short, 2 = long) */
440 32, /* bitsize */
441 TRUE, /* pc_relative */
442 0, /* bitpos */
443 complain_overflow_bitfield,/* complain_on_overflow */
444 bfd_elf_generic_reloc, /* special_function */
445 "R_ARM_GOTPC", /* name */
446 TRUE, /* partial_inplace */
447 0xffffffff, /* src_mask */
448 0xffffffff, /* dst_mask */
449 TRUE), /* pcrel_offset */
450
451 HOWTO (R_ARM_GOT32, /* type */
452 0, /* rightshift */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
454 32, /* bitsize */
455 FALSE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_bitfield,/* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 "R_ARM_GOT32", /* name */
460 TRUE, /* partial_inplace */
461 0xffffffff, /* src_mask */
462 0xffffffff, /* dst_mask */
463 FALSE), /* pcrel_offset */
464
465 HOWTO (R_ARM_PLT32, /* type */
466 2, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 24, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_bitfield,/* complain_on_overflow */
472 bfd_elf_generic_reloc, /* special_function */
473 "R_ARM_PLT32", /* name */
474 FALSE, /* partial_inplace */
475 0x00ffffff, /* src_mask */
476 0x00ffffff, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 HOWTO (R_ARM_CALL, /* type */
480 2, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 24, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed,/* complain_on_overflow */
486 bfd_elf_generic_reloc, /* special_function */
487 "R_ARM_CALL", /* name */
488 FALSE, /* partial_inplace */
489 0x00ffffff, /* src_mask */
490 0x00ffffff, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 HOWTO (R_ARM_JUMP24, /* type */
494 2, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 24, /* bitsize */
497 TRUE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_signed,/* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_ARM_JUMP24", /* name */
502 FALSE, /* partial_inplace */
503 0x00ffffff, /* src_mask */
504 0x00ffffff, /* dst_mask */
505 TRUE), /* pcrel_offset */
506
507 HOWTO (R_ARM_THM_JUMP24, /* type */
508 1, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 24, /* bitsize */
511 TRUE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_signed,/* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_ARM_THM_JUMP24", /* name */
516 FALSE, /* partial_inplace */
517 0x07ff2fff, /* src_mask */
518 0x07ff2fff, /* dst_mask */
519 TRUE), /* pcrel_offset */
520
521 HOWTO (R_ARM_BASE_ABS, /* type */
522 0, /* rightshift */
523 2, /* size (0 = byte, 1 = short, 2 = long) */
524 32, /* bitsize */
525 FALSE, /* pc_relative */
526 0, /* bitpos */
527 complain_overflow_dont,/* complain_on_overflow */
528 bfd_elf_generic_reloc, /* special_function */
529 "R_ARM_BASE_ABS", /* name */
530 FALSE, /* partial_inplace */
531 0xffffffff, /* src_mask */
532 0xffffffff, /* dst_mask */
533 FALSE), /* pcrel_offset */
534
535 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
536 0, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 12, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont,/* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_ARM_ALU_PCREL_7_0", /* name */
544 FALSE, /* partial_inplace */
545 0x00000fff, /* src_mask */
546 0x00000fff, /* dst_mask */
547 TRUE), /* pcrel_offset */
548
549 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
550 0, /* rightshift */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
552 12, /* bitsize */
553 TRUE, /* pc_relative */
554 8, /* bitpos */
555 complain_overflow_dont,/* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 "R_ARM_ALU_PCREL_15_8",/* name */
558 FALSE, /* partial_inplace */
559 0x00000fff, /* src_mask */
560 0x00000fff, /* dst_mask */
561 TRUE), /* pcrel_offset */
562
563 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 12, /* bitsize */
567 TRUE, /* pc_relative */
568 16, /* bitpos */
569 complain_overflow_dont,/* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_ARM_ALU_PCREL_23_15",/* name */
572 FALSE, /* partial_inplace */
573 0x00000fff, /* src_mask */
574 0x00000fff, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
578 0, /* rightshift */
579 2, /* size (0 = byte, 1 = short, 2 = long) */
580 12, /* bitsize */
581 FALSE, /* pc_relative */
582 0, /* bitpos */
583 complain_overflow_dont,/* complain_on_overflow */
584 bfd_elf_generic_reloc, /* special_function */
585 "R_ARM_LDR_SBREL_11_0",/* name */
586 FALSE, /* partial_inplace */
587 0x00000fff, /* src_mask */
588 0x00000fff, /* dst_mask */
589 FALSE), /* pcrel_offset */
590
591 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
592 0, /* rightshift */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
594 8, /* bitsize */
595 FALSE, /* pc_relative */
596 12, /* bitpos */
597 complain_overflow_dont,/* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_ARM_ALU_SBREL_19_12",/* name */
600 FALSE, /* partial_inplace */
601 0x000ff000, /* src_mask */
602 0x000ff000, /* dst_mask */
603 FALSE), /* pcrel_offset */
604
605 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 8, /* bitsize */
609 FALSE, /* pc_relative */
610 20, /* bitpos */
611 complain_overflow_dont,/* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_ARM_ALU_SBREL_27_20",/* name */
614 FALSE, /* partial_inplace */
615 0x0ff00000, /* src_mask */
616 0x0ff00000, /* dst_mask */
617 FALSE), /* pcrel_offset */
618
619 HOWTO (R_ARM_TARGET1, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont,/* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_ARM_TARGET1", /* name */
628 FALSE, /* partial_inplace */
629 0xffffffff, /* src_mask */
630 0xffffffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 HOWTO (R_ARM_ROSEGREL32, /* type */
634 0, /* rightshift */
635 2, /* size (0 = byte, 1 = short, 2 = long) */
636 32, /* bitsize */
637 FALSE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_dont,/* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
641 "R_ARM_ROSEGREL32", /* name */
642 FALSE, /* partial_inplace */
643 0xffffffff, /* src_mask */
644 0xffffffff, /* dst_mask */
645 FALSE), /* pcrel_offset */
646
647 HOWTO (R_ARM_V4BX, /* type */
648 0, /* rightshift */
649 2, /* size (0 = byte, 1 = short, 2 = long) */
650 32, /* bitsize */
651 FALSE, /* pc_relative */
652 0, /* bitpos */
653 complain_overflow_dont,/* complain_on_overflow */
654 bfd_elf_generic_reloc, /* special_function */
655 "R_ARM_V4BX", /* name */
656 FALSE, /* partial_inplace */
657 0xffffffff, /* src_mask */
658 0xffffffff, /* dst_mask */
659 FALSE), /* pcrel_offset */
660
661 HOWTO (R_ARM_TARGET2, /* type */
662 0, /* rightshift */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
664 32, /* bitsize */
665 FALSE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_signed,/* complain_on_overflow */
668 bfd_elf_generic_reloc, /* special_function */
669 "R_ARM_TARGET2", /* name */
670 FALSE, /* partial_inplace */
671 0xffffffff, /* src_mask */
672 0xffffffff, /* dst_mask */
673 TRUE), /* pcrel_offset */
674
675 HOWTO (R_ARM_PREL31, /* type */
676 0, /* rightshift */
677 2, /* size (0 = byte, 1 = short, 2 = long) */
678 31, /* bitsize */
679 TRUE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed,/* complain_on_overflow */
682 bfd_elf_generic_reloc, /* special_function */
683 "R_ARM_PREL31", /* name */
684 FALSE, /* partial_inplace */
685 0x7fffffff, /* src_mask */
686 0x7fffffff, /* dst_mask */
687 TRUE), /* pcrel_offset */
688
689 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
690 0, /* rightshift */
691 2, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont,/* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_ARM_MOVW_ABS_NC", /* name */
698 FALSE, /* partial_inplace */
699 0x0000ffff, /* src_mask */
700 0x0000ffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 HOWTO (R_ARM_MOVT_ABS, /* type */
704 0, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_bitfield,/* complain_on_overflow */
710 bfd_elf_generic_reloc, /* special_function */
711 "R_ARM_MOVT_ABS", /* name */
712 FALSE, /* partial_inplace */
713 0x0000ffff, /* src_mask */
714 0x0000ffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
718 0, /* rightshift */
719 2, /* size (0 = byte, 1 = short, 2 = long) */
720 16, /* bitsize */
721 TRUE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_dont,/* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_ARM_MOVW_PREL_NC", /* name */
726 FALSE, /* partial_inplace */
727 0x0000ffff, /* src_mask */
728 0x0000ffff, /* dst_mask */
729 TRUE), /* pcrel_offset */
730
731 HOWTO (R_ARM_MOVT_PREL, /* type */
732 0, /* rightshift */
733 2, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 TRUE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_bitfield,/* complain_on_overflow */
738 bfd_elf_generic_reloc, /* special_function */
739 "R_ARM_MOVT_PREL", /* name */
740 FALSE, /* partial_inplace */
741 0x0000ffff, /* src_mask */
742 0x0000ffff, /* dst_mask */
743 TRUE), /* pcrel_offset */
744
745 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
746 0, /* rightshift */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont,/* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 "R_ARM_THM_MOVW_ABS_NC",/* name */
754 FALSE, /* partial_inplace */
755 0x040f70ff, /* src_mask */
756 0x040f70ff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
760 0, /* rightshift */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_bitfield,/* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_ARM_THM_MOVT_ABS", /* name */
768 FALSE, /* partial_inplace */
769 0x040f70ff, /* src_mask */
770 0x040f70ff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 16, /* bitsize */
777 TRUE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont,/* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_ARM_THM_MOVW_PREL_NC",/* name */
782 FALSE, /* partial_inplace */
783 0x040f70ff, /* src_mask */
784 0x040f70ff, /* dst_mask */
785 TRUE), /* pcrel_offset */
786
787 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 TRUE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_bitfield,/* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_ARM_THM_MOVT_PREL", /* name */
796 FALSE, /* partial_inplace */
797 0x040f70ff, /* src_mask */
798 0x040f70ff, /* dst_mask */
799 TRUE), /* pcrel_offset */
800
801 HOWTO (R_ARM_THM_JUMP19, /* type */
802 1, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 19, /* bitsize */
805 TRUE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_signed,/* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_ARM_THM_JUMP19", /* name */
810 FALSE, /* partial_inplace */
811 0x043f2fff, /* src_mask */
812 0x043f2fff, /* dst_mask */
813 TRUE), /* pcrel_offset */
814
815 HOWTO (R_ARM_THM_JUMP6, /* type */
816 1, /* rightshift */
817 1, /* size (0 = byte, 1 = short, 2 = long) */
818 6, /* bitsize */
819 TRUE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_unsigned,/* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_ARM_THM_JUMP6", /* name */
824 FALSE, /* partial_inplace */
825 0x02f8, /* src_mask */
826 0x02f8, /* dst_mask */
827 TRUE), /* pcrel_offset */
828
829 /* These are declared as 13-bit signed relocations because we can
830 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
831 versa. */
832 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
833 0, /* rightshift */
834 2, /* size (0 = byte, 1 = short, 2 = long) */
835 13, /* bitsize */
836 TRUE, /* pc_relative */
837 0, /* bitpos */
838 complain_overflow_dont,/* complain_on_overflow */
839 bfd_elf_generic_reloc, /* special_function */
840 "R_ARM_THM_ALU_PREL_11_0",/* name */
841 FALSE, /* partial_inplace */
842 0xffffffff, /* src_mask */
843 0xffffffff, /* dst_mask */
844 TRUE), /* pcrel_offset */
845
846 HOWTO (R_ARM_THM_PC12, /* type */
847 0, /* rightshift */
848 2, /* size (0 = byte, 1 = short, 2 = long) */
849 13, /* bitsize */
850 TRUE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_dont,/* complain_on_overflow */
853 bfd_elf_generic_reloc, /* special_function */
854 "R_ARM_THM_PC12", /* name */
855 FALSE, /* partial_inplace */
856 0xffffffff, /* src_mask */
857 0xffffffff, /* dst_mask */
858 TRUE), /* pcrel_offset */
859
860 HOWTO (R_ARM_ABS32_NOI, /* type */
861 0, /* rightshift */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
863 32, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont,/* complain_on_overflow */
867 bfd_elf_generic_reloc, /* special_function */
868 "R_ARM_ABS32_NOI", /* name */
869 FALSE, /* partial_inplace */
870 0xffffffff, /* src_mask */
871 0xffffffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 HOWTO (R_ARM_REL32_NOI, /* type */
875 0, /* rightshift */
876 2, /* size (0 = byte, 1 = short, 2 = long) */
877 32, /* bitsize */
878 TRUE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont,/* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_ARM_REL32_NOI", /* name */
883 FALSE, /* partial_inplace */
884 0xffffffff, /* src_mask */
885 0xffffffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* Group relocations. */
889
890 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
891 0, /* rightshift */
892 2, /* size (0 = byte, 1 = short, 2 = long) */
893 32, /* bitsize */
894 TRUE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont,/* complain_on_overflow */
897 bfd_elf_generic_reloc, /* special_function */
898 "R_ARM_ALU_PC_G0_NC", /* name */
899 FALSE, /* partial_inplace */
900 0xffffffff, /* src_mask */
901 0xffffffff, /* dst_mask */
902 TRUE), /* pcrel_offset */
903
904 HOWTO (R_ARM_ALU_PC_G0, /* type */
905 0, /* rightshift */
906 2, /* size (0 = byte, 1 = short, 2 = long) */
907 32, /* bitsize */
908 TRUE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont,/* complain_on_overflow */
911 bfd_elf_generic_reloc, /* special_function */
912 "R_ARM_ALU_PC_G0", /* name */
913 FALSE, /* partial_inplace */
914 0xffffffff, /* src_mask */
915 0xffffffff, /* dst_mask */
916 TRUE), /* pcrel_offset */
917
918 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
919 0, /* rightshift */
920 2, /* size (0 = byte, 1 = short, 2 = long) */
921 32, /* bitsize */
922 TRUE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont,/* complain_on_overflow */
925 bfd_elf_generic_reloc, /* special_function */
926 "R_ARM_ALU_PC_G1_NC", /* name */
927 FALSE, /* partial_inplace */
928 0xffffffff, /* src_mask */
929 0xffffffff, /* dst_mask */
930 TRUE), /* pcrel_offset */
931
932 HOWTO (R_ARM_ALU_PC_G1, /* type */
933 0, /* rightshift */
934 2, /* size (0 = byte, 1 = short, 2 = long) */
935 32, /* bitsize */
936 TRUE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont,/* complain_on_overflow */
939 bfd_elf_generic_reloc, /* special_function */
940 "R_ARM_ALU_PC_G1", /* name */
941 FALSE, /* partial_inplace */
942 0xffffffff, /* src_mask */
943 0xffffffff, /* dst_mask */
944 TRUE), /* pcrel_offset */
945
946 HOWTO (R_ARM_ALU_PC_G2, /* type */
947 0, /* rightshift */
948 2, /* size (0 = byte, 1 = short, 2 = long) */
949 32, /* bitsize */
950 TRUE, /* pc_relative */
951 0, /* bitpos */
952 complain_overflow_dont,/* complain_on_overflow */
953 bfd_elf_generic_reloc, /* special_function */
954 "R_ARM_ALU_PC_G2", /* name */
955 FALSE, /* partial_inplace */
956 0xffffffff, /* src_mask */
957 0xffffffff, /* dst_mask */
958 TRUE), /* pcrel_offset */
959
960 HOWTO (R_ARM_LDR_PC_G1, /* type */
961 0, /* rightshift */
962 2, /* size (0 = byte, 1 = short, 2 = long) */
963 32, /* bitsize */
964 TRUE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont,/* complain_on_overflow */
967 bfd_elf_generic_reloc, /* special_function */
968 "R_ARM_LDR_PC_G1", /* name */
969 FALSE, /* partial_inplace */
970 0xffffffff, /* src_mask */
971 0xffffffff, /* dst_mask */
972 TRUE), /* pcrel_offset */
973
974 HOWTO (R_ARM_LDR_PC_G2, /* type */
975 0, /* rightshift */
976 2, /* size (0 = byte, 1 = short, 2 = long) */
977 32, /* bitsize */
978 TRUE, /* pc_relative */
979 0, /* bitpos */
980 complain_overflow_dont,/* complain_on_overflow */
981 bfd_elf_generic_reloc, /* special_function */
982 "R_ARM_LDR_PC_G2", /* name */
983 FALSE, /* partial_inplace */
984 0xffffffff, /* src_mask */
985 0xffffffff, /* dst_mask */
986 TRUE), /* pcrel_offset */
987
988 HOWTO (R_ARM_LDRS_PC_G0, /* type */
989 0, /* rightshift */
990 2, /* size (0 = byte, 1 = short, 2 = long) */
991 32, /* bitsize */
992 TRUE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_dont,/* complain_on_overflow */
995 bfd_elf_generic_reloc, /* special_function */
996 "R_ARM_LDRS_PC_G0", /* name */
997 FALSE, /* partial_inplace */
998 0xffffffff, /* src_mask */
999 0xffffffff, /* dst_mask */
1000 TRUE), /* pcrel_offset */
1001
1002 HOWTO (R_ARM_LDRS_PC_G1, /* type */
1003 0, /* rightshift */
1004 2, /* size (0 = byte, 1 = short, 2 = long) */
1005 32, /* bitsize */
1006 TRUE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_dont,/* complain_on_overflow */
1009 bfd_elf_generic_reloc, /* special_function */
1010 "R_ARM_LDRS_PC_G1", /* name */
1011 FALSE, /* partial_inplace */
1012 0xffffffff, /* src_mask */
1013 0xffffffff, /* dst_mask */
1014 TRUE), /* pcrel_offset */
1015
1016 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1017 0, /* rightshift */
1018 2, /* size (0 = byte, 1 = short, 2 = long) */
1019 32, /* bitsize */
1020 TRUE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont,/* complain_on_overflow */
1023 bfd_elf_generic_reloc, /* special_function */
1024 "R_ARM_LDRS_PC_G2", /* name */
1025 FALSE, /* partial_inplace */
1026 0xffffffff, /* src_mask */
1027 0xffffffff, /* dst_mask */
1028 TRUE), /* pcrel_offset */
1029
1030 HOWTO (R_ARM_LDC_PC_G0, /* type */
1031 0, /* rightshift */
1032 2, /* size (0 = byte, 1 = short, 2 = long) */
1033 32, /* bitsize */
1034 TRUE, /* pc_relative */
1035 0, /* bitpos */
1036 complain_overflow_dont,/* complain_on_overflow */
1037 bfd_elf_generic_reloc, /* special_function */
1038 "R_ARM_LDC_PC_G0", /* name */
1039 FALSE, /* partial_inplace */
1040 0xffffffff, /* src_mask */
1041 0xffffffff, /* dst_mask */
1042 TRUE), /* pcrel_offset */
1043
1044 HOWTO (R_ARM_LDC_PC_G1, /* type */
1045 0, /* rightshift */
1046 2, /* size (0 = byte, 1 = short, 2 = long) */
1047 32, /* bitsize */
1048 TRUE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 bfd_elf_generic_reloc, /* special_function */
1052 "R_ARM_LDC_PC_G1", /* name */
1053 FALSE, /* partial_inplace */
1054 0xffffffff, /* src_mask */
1055 0xffffffff, /* dst_mask */
1056 TRUE), /* pcrel_offset */
1057
1058 HOWTO (R_ARM_LDC_PC_G2, /* type */
1059 0, /* rightshift */
1060 2, /* size (0 = byte, 1 = short, 2 = long) */
1061 32, /* bitsize */
1062 TRUE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 bfd_elf_generic_reloc, /* special_function */
1066 "R_ARM_LDC_PC_G2", /* name */
1067 FALSE, /* partial_inplace */
1068 0xffffffff, /* src_mask */
1069 0xffffffff, /* dst_mask */
1070 TRUE), /* pcrel_offset */
1071
1072 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1073 0, /* rightshift */
1074 2, /* size (0 = byte, 1 = short, 2 = long) */
1075 32, /* bitsize */
1076 TRUE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_dont,/* complain_on_overflow */
1079 bfd_elf_generic_reloc, /* special_function */
1080 "R_ARM_ALU_SB_G0_NC", /* name */
1081 FALSE, /* partial_inplace */
1082 0xffffffff, /* src_mask */
1083 0xffffffff, /* dst_mask */
1084 TRUE), /* pcrel_offset */
1085
1086 HOWTO (R_ARM_ALU_SB_G0, /* type */
1087 0, /* rightshift */
1088 2, /* size (0 = byte, 1 = short, 2 = long) */
1089 32, /* bitsize */
1090 TRUE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont,/* complain_on_overflow */
1093 bfd_elf_generic_reloc, /* special_function */
1094 "R_ARM_ALU_SB_G0", /* name */
1095 FALSE, /* partial_inplace */
1096 0xffffffff, /* src_mask */
1097 0xffffffff, /* dst_mask */
1098 TRUE), /* pcrel_offset */
1099
1100 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1101 0, /* rightshift */
1102 2, /* size (0 = byte, 1 = short, 2 = long) */
1103 32, /* bitsize */
1104 TRUE, /* pc_relative */
1105 0, /* bitpos */
1106 complain_overflow_dont,/* complain_on_overflow */
1107 bfd_elf_generic_reloc, /* special_function */
1108 "R_ARM_ALU_SB_G1_NC", /* name */
1109 FALSE, /* partial_inplace */
1110 0xffffffff, /* src_mask */
1111 0xffffffff, /* dst_mask */
1112 TRUE), /* pcrel_offset */
1113
1114 HOWTO (R_ARM_ALU_SB_G1, /* type */
1115 0, /* rightshift */
1116 2, /* size (0 = byte, 1 = short, 2 = long) */
1117 32, /* bitsize */
1118 TRUE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont,/* complain_on_overflow */
1121 bfd_elf_generic_reloc, /* special_function */
1122 "R_ARM_ALU_SB_G1", /* name */
1123 FALSE, /* partial_inplace */
1124 0xffffffff, /* src_mask */
1125 0xffffffff, /* dst_mask */
1126 TRUE), /* pcrel_offset */
1127
1128 HOWTO (R_ARM_ALU_SB_G2, /* type */
1129 0, /* rightshift */
1130 2, /* size (0 = byte, 1 = short, 2 = long) */
1131 32, /* bitsize */
1132 TRUE, /* pc_relative */
1133 0, /* bitpos */
1134 complain_overflow_dont,/* complain_on_overflow */
1135 bfd_elf_generic_reloc, /* special_function */
1136 "R_ARM_ALU_SB_G2", /* name */
1137 FALSE, /* partial_inplace */
1138 0xffffffff, /* src_mask */
1139 0xffffffff, /* dst_mask */
1140 TRUE), /* pcrel_offset */
1141
1142 HOWTO (R_ARM_LDR_SB_G0, /* type */
1143 0, /* rightshift */
1144 2, /* size (0 = byte, 1 = short, 2 = long) */
1145 32, /* bitsize */
1146 TRUE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_ARM_LDR_SB_G0", /* name */
1151 FALSE, /* partial_inplace */
1152 0xffffffff, /* src_mask */
1153 0xffffffff, /* dst_mask */
1154 TRUE), /* pcrel_offset */
1155
1156 HOWTO (R_ARM_LDR_SB_G1, /* type */
1157 0, /* rightshift */
1158 2, /* size (0 = byte, 1 = short, 2 = long) */
1159 32, /* bitsize */
1160 TRUE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont,/* complain_on_overflow */
1163 bfd_elf_generic_reloc, /* special_function */
1164 "R_ARM_LDR_SB_G1", /* name */
1165 FALSE, /* partial_inplace */
1166 0xffffffff, /* src_mask */
1167 0xffffffff, /* dst_mask */
1168 TRUE), /* pcrel_offset */
1169
1170 HOWTO (R_ARM_LDR_SB_G2, /* type */
1171 0, /* rightshift */
1172 2, /* size (0 = byte, 1 = short, 2 = long) */
1173 32, /* bitsize */
1174 TRUE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont,/* complain_on_overflow */
1177 bfd_elf_generic_reloc, /* special_function */
1178 "R_ARM_LDR_SB_G2", /* name */
1179 FALSE, /* partial_inplace */
1180 0xffffffff, /* src_mask */
1181 0xffffffff, /* dst_mask */
1182 TRUE), /* pcrel_offset */
1183
1184 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 32, /* bitsize */
1188 TRUE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_dont,/* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_ARM_LDRS_SB_G0", /* name */
1193 FALSE, /* partial_inplace */
1194 0xffffffff, /* src_mask */
1195 0xffffffff, /* dst_mask */
1196 TRUE), /* pcrel_offset */
1197
1198 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1199 0, /* rightshift */
1200 2, /* size (0 = byte, 1 = short, 2 = long) */
1201 32, /* bitsize */
1202 TRUE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_dont,/* complain_on_overflow */
1205 bfd_elf_generic_reloc, /* special_function */
1206 "R_ARM_LDRS_SB_G1", /* name */
1207 FALSE, /* partial_inplace */
1208 0xffffffff, /* src_mask */
1209 0xffffffff, /* dst_mask */
1210 TRUE), /* pcrel_offset */
1211
1212 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1213 0, /* rightshift */
1214 2, /* size (0 = byte, 1 = short, 2 = long) */
1215 32, /* bitsize */
1216 TRUE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_ARM_LDRS_SB_G2", /* name */
1221 FALSE, /* partial_inplace */
1222 0xffffffff, /* src_mask */
1223 0xffffffff, /* dst_mask */
1224 TRUE), /* pcrel_offset */
1225
1226 HOWTO (R_ARM_LDC_SB_G0, /* type */
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 TRUE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont,/* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_ARM_LDC_SB_G0", /* name */
1235 FALSE, /* partial_inplace */
1236 0xffffffff, /* src_mask */
1237 0xffffffff, /* dst_mask */
1238 TRUE), /* pcrel_offset */
1239
1240 HOWTO (R_ARM_LDC_SB_G1, /* type */
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 TRUE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont,/* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_ARM_LDC_SB_G1", /* name */
1249 FALSE, /* partial_inplace */
1250 0xffffffff, /* src_mask */
1251 0xffffffff, /* dst_mask */
1252 TRUE), /* pcrel_offset */
1253
1254 HOWTO (R_ARM_LDC_SB_G2, /* type */
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 TRUE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont,/* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_ARM_LDC_SB_G2", /* name */
1263 FALSE, /* partial_inplace */
1264 0xffffffff, /* src_mask */
1265 0xffffffff, /* dst_mask */
1266 TRUE), /* pcrel_offset */
1267
1268 /* End of group relocations. */
1269
1270 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1271 0, /* rightshift */
1272 2, /* size (0 = byte, 1 = short, 2 = long) */
1273 16, /* bitsize */
1274 FALSE, /* pc_relative */
1275 0, /* bitpos */
1276 complain_overflow_dont,/* complain_on_overflow */
1277 bfd_elf_generic_reloc, /* special_function */
1278 "R_ARM_MOVW_BREL_NC", /* name */
1279 FALSE, /* partial_inplace */
1280 0x0000ffff, /* src_mask */
1281 0x0000ffff, /* dst_mask */
1282 FALSE), /* pcrel_offset */
1283
1284 HOWTO (R_ARM_MOVT_BREL, /* type */
1285 0, /* rightshift */
1286 2, /* size (0 = byte, 1 = short, 2 = long) */
1287 16, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_bitfield,/* complain_on_overflow */
1291 bfd_elf_generic_reloc, /* special_function */
1292 "R_ARM_MOVT_BREL", /* name */
1293 FALSE, /* partial_inplace */
1294 0x0000ffff, /* src_mask */
1295 0x0000ffff, /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 HOWTO (R_ARM_MOVW_BREL, /* type */
1299 0, /* rightshift */
1300 2, /* size (0 = byte, 1 = short, 2 = long) */
1301 16, /* bitsize */
1302 FALSE, /* pc_relative */
1303 0, /* bitpos */
1304 complain_overflow_dont,/* complain_on_overflow */
1305 bfd_elf_generic_reloc, /* special_function */
1306 "R_ARM_MOVW_BREL", /* name */
1307 FALSE, /* partial_inplace */
1308 0x0000ffff, /* src_mask */
1309 0x0000ffff, /* dst_mask */
1310 FALSE), /* pcrel_offset */
1311
1312 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1313 0, /* rightshift */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1315 16, /* bitsize */
1316 FALSE, /* pc_relative */
1317 0, /* bitpos */
1318 complain_overflow_dont,/* complain_on_overflow */
1319 bfd_elf_generic_reloc, /* special_function */
1320 "R_ARM_THM_MOVW_BREL_NC",/* name */
1321 FALSE, /* partial_inplace */
1322 0x040f70ff, /* src_mask */
1323 0x040f70ff, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1325
1326 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1327 0, /* rightshift */
1328 2, /* size (0 = byte, 1 = short, 2 = long) */
1329 16, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_bitfield,/* complain_on_overflow */
1333 bfd_elf_generic_reloc, /* special_function */
1334 "R_ARM_THM_MOVT_BREL", /* name */
1335 FALSE, /* partial_inplace */
1336 0x040f70ff, /* src_mask */
1337 0x040f70ff, /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1341 0, /* rightshift */
1342 2, /* size (0 = byte, 1 = short, 2 = long) */
1343 16, /* bitsize */
1344 FALSE, /* pc_relative */
1345 0, /* bitpos */
1346 complain_overflow_dont,/* complain_on_overflow */
1347 bfd_elf_generic_reloc, /* special_function */
1348 "R_ARM_THM_MOVW_BREL", /* name */
1349 FALSE, /* partial_inplace */
1350 0x040f70ff, /* src_mask */
1351 0x040f70ff, /* dst_mask */
1352 FALSE), /* pcrel_offset */
1353
1354 EMPTY_HOWTO (90), /* unallocated */
1355 EMPTY_HOWTO (91),
1356 EMPTY_HOWTO (92),
1357 EMPTY_HOWTO (93),
1358
1359 HOWTO (R_ARM_PLT32_ABS, /* type */
1360 0, /* rightshift */
1361 2, /* size (0 = byte, 1 = short, 2 = long) */
1362 32, /* bitsize */
1363 FALSE, /* pc_relative */
1364 0, /* bitpos */
1365 complain_overflow_dont,/* complain_on_overflow */
1366 bfd_elf_generic_reloc, /* special_function */
1367 "R_ARM_PLT32_ABS", /* name */
1368 FALSE, /* partial_inplace */
1369 0xffffffff, /* src_mask */
1370 0xffffffff, /* dst_mask */
1371 FALSE), /* pcrel_offset */
1372
1373 HOWTO (R_ARM_GOT_ABS, /* type */
1374 0, /* rightshift */
1375 2, /* size (0 = byte, 1 = short, 2 = long) */
1376 32, /* bitsize */
1377 FALSE, /* pc_relative */
1378 0, /* bitpos */
1379 complain_overflow_dont,/* complain_on_overflow */
1380 bfd_elf_generic_reloc, /* special_function */
1381 "R_ARM_GOT_ABS", /* name */
1382 FALSE, /* partial_inplace */
1383 0xffffffff, /* src_mask */
1384 0xffffffff, /* dst_mask */
1385 FALSE), /* pcrel_offset */
1386
1387 HOWTO (R_ARM_GOT_PREL, /* type */
1388 0, /* rightshift */
1389 2, /* size (0 = byte, 1 = short, 2 = long) */
1390 32, /* bitsize */
1391 TRUE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_dont, /* complain_on_overflow */
1394 bfd_elf_generic_reloc, /* special_function */
1395 "R_ARM_GOT_PREL", /* name */
1396 FALSE, /* partial_inplace */
1397 0xffffffff, /* src_mask */
1398 0xffffffff, /* dst_mask */
1399 TRUE), /* pcrel_offset */
1400
1401 HOWTO (R_ARM_GOT_BREL12, /* type */
1402 0, /* rightshift */
1403 2, /* size (0 = byte, 1 = short, 2 = long) */
1404 12, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_bitfield,/* complain_on_overflow */
1408 bfd_elf_generic_reloc, /* special_function */
1409 "R_ARM_GOT_BREL12", /* name */
1410 FALSE, /* partial_inplace */
1411 0x00000fff, /* src_mask */
1412 0x00000fff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 HOWTO (R_ARM_GOTOFF12, /* type */
1416 0, /* rightshift */
1417 2, /* size (0 = byte, 1 = short, 2 = long) */
1418 12, /* bitsize */
1419 FALSE, /* pc_relative */
1420 0, /* bitpos */
1421 complain_overflow_bitfield,/* complain_on_overflow */
1422 bfd_elf_generic_reloc, /* special_function */
1423 "R_ARM_GOTOFF12", /* name */
1424 FALSE, /* partial_inplace */
1425 0x00000fff, /* src_mask */
1426 0x00000fff, /* dst_mask */
1427 FALSE), /* pcrel_offset */
1428
1429 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1430
1431 /* GNU extension to record C++ vtable member usage */
1432 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1433 0, /* rightshift */
1434 2, /* size (0 = byte, 1 = short, 2 = long) */
1435 0, /* bitsize */
1436 FALSE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1440 "R_ARM_GNU_VTENTRY", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0, /* dst_mask */
1444 FALSE), /* pcrel_offset */
1445
1446 /* GNU extension to record C++ vtable hierarchy */
1447 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1448 0, /* rightshift */
1449 2, /* size (0 = byte, 1 = short, 2 = long) */
1450 0, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 NULL, /* special_function */
1455 "R_ARM_GNU_VTINHERIT", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 HOWTO (R_ARM_THM_JUMP11, /* type */
1462 1, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 11, /* bitsize */
1465 TRUE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 bfd_elf_generic_reloc, /* special_function */
1469 "R_ARM_THM_JUMP11", /* name */
1470 FALSE, /* partial_inplace */
1471 0x000007ff, /* src_mask */
1472 0x000007ff, /* dst_mask */
1473 TRUE), /* pcrel_offset */
1474
1475 HOWTO (R_ARM_THM_JUMP8, /* type */
1476 1, /* rightshift */
1477 1, /* size (0 = byte, 1 = short, 2 = long) */
1478 8, /* bitsize */
1479 TRUE, /* pc_relative */
1480 0, /* bitpos */
1481 complain_overflow_signed, /* complain_on_overflow */
1482 bfd_elf_generic_reloc, /* special_function */
1483 "R_ARM_THM_JUMP8", /* name */
1484 FALSE, /* partial_inplace */
1485 0x000000ff, /* src_mask */
1486 0x000000ff, /* dst_mask */
1487 TRUE), /* pcrel_offset */
1488
1489 /* TLS relocations */
1490 HOWTO (R_ARM_TLS_GD32, /* type */
1491 0, /* rightshift */
1492 2, /* size (0 = byte, 1 = short, 2 = long) */
1493 32, /* bitsize */
1494 FALSE, /* pc_relative */
1495 0, /* bitpos */
1496 complain_overflow_bitfield,/* complain_on_overflow */
1497 NULL, /* special_function */
1498 "R_ARM_TLS_GD32", /* name */
1499 TRUE, /* partial_inplace */
1500 0xffffffff, /* src_mask */
1501 0xffffffff, /* dst_mask */
1502 FALSE), /* pcrel_offset */
1503
1504 HOWTO (R_ARM_TLS_LDM32, /* type */
1505 0, /* rightshift */
1506 2, /* size (0 = byte, 1 = short, 2 = long) */
1507 32, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_bitfield,/* complain_on_overflow */
1511 bfd_elf_generic_reloc, /* special_function */
1512 "R_ARM_TLS_LDM32", /* name */
1513 TRUE, /* partial_inplace */
1514 0xffffffff, /* src_mask */
1515 0xffffffff, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 HOWTO (R_ARM_TLS_LDO32, /* type */
1519 0, /* rightshift */
1520 2, /* size (0 = byte, 1 = short, 2 = long) */
1521 32, /* bitsize */
1522 FALSE, /* pc_relative */
1523 0, /* bitpos */
1524 complain_overflow_bitfield,/* complain_on_overflow */
1525 bfd_elf_generic_reloc, /* special_function */
1526 "R_ARM_TLS_LDO32", /* name */
1527 TRUE, /* partial_inplace */
1528 0xffffffff, /* src_mask */
1529 0xffffffff, /* dst_mask */
1530 FALSE), /* pcrel_offset */
1531
1532 HOWTO (R_ARM_TLS_IE32, /* type */
1533 0, /* rightshift */
1534 2, /* size (0 = byte, 1 = short, 2 = long) */
1535 32, /* bitsize */
1536 FALSE, /* pc_relative */
1537 0, /* bitpos */
1538 complain_overflow_bitfield,/* complain_on_overflow */
1539 NULL, /* special_function */
1540 "R_ARM_TLS_IE32", /* name */
1541 TRUE, /* partial_inplace */
1542 0xffffffff, /* src_mask */
1543 0xffffffff, /* dst_mask */
1544 FALSE), /* pcrel_offset */
1545
1546 HOWTO (R_ARM_TLS_LE32, /* type */
1547 0, /* rightshift */
1548 2, /* size (0 = byte, 1 = short, 2 = long) */
1549 32, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_bitfield,/* complain_on_overflow */
1553 bfd_elf_generic_reloc, /* special_function */
1554 "R_ARM_TLS_LE32", /* name */
1555 TRUE, /* partial_inplace */
1556 0xffffffff, /* src_mask */
1557 0xffffffff, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 HOWTO (R_ARM_TLS_LDO12, /* type */
1561 0, /* rightshift */
1562 2, /* size (0 = byte, 1 = short, 2 = long) */
1563 12, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_bitfield,/* complain_on_overflow */
1567 bfd_elf_generic_reloc, /* special_function */
1568 "R_ARM_TLS_LDO12", /* name */
1569 FALSE, /* partial_inplace */
1570 0x00000fff, /* src_mask */
1571 0x00000fff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 HOWTO (R_ARM_TLS_LE12, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 12, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_bitfield,/* complain_on_overflow */
1581 bfd_elf_generic_reloc, /* special_function */
1582 "R_ARM_TLS_LE12", /* name */
1583 FALSE, /* partial_inplace */
1584 0x00000fff, /* src_mask */
1585 0x00000fff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 HOWTO (R_ARM_TLS_IE12GP, /* type */
1589 0, /* rightshift */
1590 2, /* size (0 = byte, 1 = short, 2 = long) */
1591 12, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_bitfield,/* complain_on_overflow */
1595 bfd_elf_generic_reloc, /* special_function */
1596 "R_ARM_TLS_IE12GP", /* name */
1597 FALSE, /* partial_inplace */
1598 0x00000fff, /* src_mask */
1599 0x00000fff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601 };
1602
1603 /* 112-127 private relocations
1604 128 R_ARM_ME_TOO, obsolete
1605 129-255 unallocated in AAELF.
1606
1607 249-255 extended, currently unused, relocations: */
1608
1609 static reloc_howto_type elf32_arm_howto_table_2[4] =
1610 {
1611 HOWTO (R_ARM_RREL32, /* type */
1612 0, /* rightshift */
1613 0, /* size (0 = byte, 1 = short, 2 = long) */
1614 0, /* bitsize */
1615 FALSE, /* pc_relative */
1616 0, /* bitpos */
1617 complain_overflow_dont,/* complain_on_overflow */
1618 bfd_elf_generic_reloc, /* special_function */
1619 "R_ARM_RREL32", /* name */
1620 FALSE, /* partial_inplace */
1621 0, /* src_mask */
1622 0, /* dst_mask */
1623 FALSE), /* pcrel_offset */
1624
1625 HOWTO (R_ARM_RABS32, /* type */
1626 0, /* rightshift */
1627 0, /* size (0 = byte, 1 = short, 2 = long) */
1628 0, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont,/* complain_on_overflow */
1632 bfd_elf_generic_reloc, /* special_function */
1633 "R_ARM_RABS32", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 HOWTO (R_ARM_RPC24, /* type */
1640 0, /* rightshift */
1641 0, /* size (0 = byte, 1 = short, 2 = long) */
1642 0, /* bitsize */
1643 FALSE, /* pc_relative */
1644 0, /* bitpos */
1645 complain_overflow_dont,/* complain_on_overflow */
1646 bfd_elf_generic_reloc, /* special_function */
1647 "R_ARM_RPC24", /* name */
1648 FALSE, /* partial_inplace */
1649 0, /* src_mask */
1650 0, /* dst_mask */
1651 FALSE), /* pcrel_offset */
1652
1653 HOWTO (R_ARM_RBASE, /* type */
1654 0, /* rightshift */
1655 0, /* size (0 = byte, 1 = short, 2 = long) */
1656 0, /* bitsize */
1657 FALSE, /* pc_relative */
1658 0, /* bitpos */
1659 complain_overflow_dont,/* complain_on_overflow */
1660 bfd_elf_generic_reloc, /* special_function */
1661 "R_ARM_RBASE", /* name */
1662 FALSE, /* partial_inplace */
1663 0, /* src_mask */
1664 0, /* dst_mask */
1665 FALSE) /* pcrel_offset */
1666 };
1667
1668 static reloc_howto_type *
1669 elf32_arm_howto_from_type (unsigned int r_type)
1670 {
1671 if (r_type < NUM_ELEM (elf32_arm_howto_table_1))
1672 return &elf32_arm_howto_table_1[r_type];
1673
1674 if (r_type >= R_ARM_RREL32
1675 && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2))
1676 return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32];
1677
1678 return NULL;
1679 }
1680
1681 static void
1682 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1683 Elf_Internal_Rela * elf_reloc)
1684 {
1685 unsigned int r_type;
1686
1687 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1688 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1689 }
1690
1691 struct elf32_arm_reloc_map
1692 {
1693 bfd_reloc_code_real_type bfd_reloc_val;
1694 unsigned char elf_reloc_val;
1695 };
1696
1697 /* All entries in this list must also be present in elf32_arm_howto_table. */
1698 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1699 {
1700 {BFD_RELOC_NONE, R_ARM_NONE},
1701 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1702 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1703 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1704 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1705 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1706 {BFD_RELOC_32, R_ARM_ABS32},
1707 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1708 {BFD_RELOC_8, R_ARM_ABS8},
1709 {BFD_RELOC_16, R_ARM_ABS16},
1710 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1711 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1712 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1713 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1714 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1715 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1716 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1717 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1718 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1719 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1720 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1721 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1722 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1723 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1724 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1725 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1726 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1727 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1728 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1729 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1730 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1731 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1732 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1733 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1734 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1735 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1736 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1737 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1738 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1739 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1740 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1741 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1742 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1743 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1744 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1745 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1746 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1747 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1748 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1749 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1750 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1751 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1752 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1753 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1754 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1755 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1756 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1757 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1758 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1759 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1760 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1761 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1762 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1763 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1764 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1765 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1766 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1767 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1768 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1769 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1770 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1771 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1772 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1773 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1774 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1775 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1776 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2}
1777 };
1778
1779 static reloc_howto_type *
1780 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1781 bfd_reloc_code_real_type code)
1782 {
1783 unsigned int i;
1784 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1785 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1786 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1787
1788 return NULL;
1789 }
1790
1791 static reloc_howto_type *
1792 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1793 const char *r_name)
1794 {
1795 unsigned int i;
1796
1797 for (i = 0;
1798 i < (sizeof (elf32_arm_howto_table_1)
1799 / sizeof (elf32_arm_howto_table_1[0]));
1800 i++)
1801 if (elf32_arm_howto_table_1[i].name != NULL
1802 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1803 return &elf32_arm_howto_table_1[i];
1804
1805 for (i = 0;
1806 i < (sizeof (elf32_arm_howto_table_2)
1807 / sizeof (elf32_arm_howto_table_2[0]));
1808 i++)
1809 if (elf32_arm_howto_table_2[i].name != NULL
1810 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1811 return &elf32_arm_howto_table_2[i];
1812
1813 return NULL;
1814 }
1815
1816 /* Support for core dump NOTE sections */
1817 static bfd_boolean
1818 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1819 {
1820 int offset;
1821 size_t size;
1822
1823 switch (note->descsz)
1824 {
1825 default:
1826 return FALSE;
1827
1828 case 148: /* Linux/ARM 32-bit*/
1829 /* pr_cursig */
1830 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1831
1832 /* pr_pid */
1833 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1834
1835 /* pr_reg */
1836 offset = 72;
1837 size = 72;
1838
1839 break;
1840 }
1841
1842 /* Make a ".reg/999" section. */
1843 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1844 size, note->descpos + offset);
1845 }
1846
1847 static bfd_boolean
1848 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1849 {
1850 switch (note->descsz)
1851 {
1852 default:
1853 return FALSE;
1854
1855 case 124: /* Linux/ARM elf_prpsinfo */
1856 elf_tdata (abfd)->core_program
1857 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1858 elf_tdata (abfd)->core_command
1859 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1860 }
1861
1862 /* Note that for some reason, a spurious space is tacked
1863 onto the end of the args in some (at least one anyway)
1864 implementations, so strip it off if it exists. */
1865
1866 {
1867 char *command = elf_tdata (abfd)->core_command;
1868 int n = strlen (command);
1869
1870 if (0 < n && command[n - 1] == ' ')
1871 command[n - 1] = '\0';
1872 }
1873
1874 return TRUE;
1875 }
1876
1877 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1878 #define TARGET_LITTLE_NAME "elf32-littlearm"
1879 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1880 #define TARGET_BIG_NAME "elf32-bigarm"
1881
1882 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1883 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1884
1885 typedef unsigned long int insn32;
1886 typedef unsigned short int insn16;
1887
1888 /* In lieu of proper flags, assume all EABIv4 or later objects are
1889 interworkable. */
1890 #define INTERWORK_FLAG(abfd) \
1891 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1892 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1893
1894 /* The linker script knows the section names for placement.
1895 The entry_names are used to do simple name mangling on the stubs.
1896 Given a function name, and its type, the stub can be found. The
1897 name can be changed. The only requirement is the %s be present. */
1898 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1899 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1900
1901 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1902 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1903
1904 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1905 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1906
1907 /* The name of the dynamic interpreter. This is put in the .interp
1908 section. */
1909 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1910
1911 #ifdef FOUR_WORD_PLT
1912
1913 /* The first entry in a procedure linkage table looks like
1914 this. It is set up so that any shared library function that is
1915 called before the relocation has been set up calls the dynamic
1916 linker first. */
1917 static const bfd_vma elf32_arm_plt0_entry [] =
1918 {
1919 0xe52de004, /* str lr, [sp, #-4]! */
1920 0xe59fe010, /* ldr lr, [pc, #16] */
1921 0xe08fe00e, /* add lr, pc, lr */
1922 0xe5bef008, /* ldr pc, [lr, #8]! */
1923 };
1924
1925 /* Subsequent entries in a procedure linkage table look like
1926 this. */
1927 static const bfd_vma elf32_arm_plt_entry [] =
1928 {
1929 0xe28fc600, /* add ip, pc, #NN */
1930 0xe28cca00, /* add ip, ip, #NN */
1931 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1932 0x00000000, /* unused */
1933 };
1934
1935 #else
1936
1937 /* The first entry in a procedure linkage table looks like
1938 this. It is set up so that any shared library function that is
1939 called before the relocation has been set up calls the dynamic
1940 linker first. */
1941 static const bfd_vma elf32_arm_plt0_entry [] =
1942 {
1943 0xe52de004, /* str lr, [sp, #-4]! */
1944 0xe59fe004, /* ldr lr, [pc, #4] */
1945 0xe08fe00e, /* add lr, pc, lr */
1946 0xe5bef008, /* ldr pc, [lr, #8]! */
1947 0x00000000, /* &GOT[0] - . */
1948 };
1949
1950 /* Subsequent entries in a procedure linkage table look like
1951 this. */
1952 static const bfd_vma elf32_arm_plt_entry [] =
1953 {
1954 0xe28fc600, /* add ip, pc, #0xNN00000 */
1955 0xe28cca00, /* add ip, ip, #0xNN000 */
1956 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1957 };
1958
1959 #endif
1960
1961 /* The format of the first entry in the procedure linkage table
1962 for a VxWorks executable. */
1963 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1964 {
1965 0xe52dc008, /* str ip,[sp,#-8]! */
1966 0xe59fc000, /* ldr ip,[pc] */
1967 0xe59cf008, /* ldr pc,[ip,#8] */
1968 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1969 };
1970
1971 /* The format of subsequent entries in a VxWorks executable. */
1972 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1973 {
1974 0xe59fc000, /* ldr ip,[pc] */
1975 0xe59cf000, /* ldr pc,[ip] */
1976 0x00000000, /* .long @got */
1977 0xe59fc000, /* ldr ip,[pc] */
1978 0xea000000, /* b _PLT */
1979 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1980 };
1981
1982 /* The format of entries in a VxWorks shared library. */
1983 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1984 {
1985 0xe59fc000, /* ldr ip,[pc] */
1986 0xe79cf009, /* ldr pc,[ip,r9] */
1987 0x00000000, /* .long @got */
1988 0xe59fc000, /* ldr ip,[pc] */
1989 0xe599f008, /* ldr pc,[r9,#8] */
1990 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1991 };
1992
1993 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1994 #define PLT_THUMB_STUB_SIZE 4
1995 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1996 {
1997 0x4778, /* bx pc */
1998 0x46c0 /* nop */
1999 };
2000
2001 /* The entries in a PLT when using a DLL-based target with multiple
2002 address spaces. */
2003 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2004 {
2005 0xe51ff004, /* ldr pc, [pc, #-4] */
2006 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2007 };
2008
2009 /* Used to build a map of a section. This is required for mixed-endian
2010 code/data. */
2011
2012 typedef struct elf32_elf_section_map
2013 {
2014 bfd_vma vma;
2015 char type;
2016 }
2017 elf32_arm_section_map;
2018
2019 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2020
2021 typedef enum
2022 {
2023 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2024 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2025 VFP11_ERRATUM_ARM_VENEER,
2026 VFP11_ERRATUM_THUMB_VENEER
2027 }
2028 elf32_vfp11_erratum_type;
2029
2030 typedef struct elf32_vfp11_erratum_list
2031 {
2032 struct elf32_vfp11_erratum_list *next;
2033 bfd_vma vma;
2034 union
2035 {
2036 struct
2037 {
2038 struct elf32_vfp11_erratum_list *veneer;
2039 unsigned int vfp_insn;
2040 } b;
2041 struct
2042 {
2043 struct elf32_vfp11_erratum_list *branch;
2044 unsigned int id;
2045 } v;
2046 } u;
2047 elf32_vfp11_erratum_type type;
2048 }
2049 elf32_vfp11_erratum_list;
2050
2051 typedef struct _arm_elf_section_data
2052 {
2053 struct bfd_elf_section_data elf;
2054 unsigned int mapcount;
2055 unsigned int mapsize;
2056 elf32_arm_section_map *map;
2057 unsigned int erratumcount;
2058 elf32_vfp11_erratum_list *erratumlist;
2059 }
2060 _arm_elf_section_data;
2061
2062 #define elf32_arm_section_data(sec) \
2063 ((_arm_elf_section_data *) elf_section_data (sec))
2064
2065 /* The size of the thread control block. */
2066 #define TCB_SIZE 8
2067
2068 struct elf32_arm_obj_tdata
2069 {
2070 struct elf_obj_tdata root;
2071
2072 /* tls_type for each local got entry. */
2073 char *local_got_tls_type;
2074
2075 /* Zero to warn when linking objects with incompatible enum sizes. */
2076 int no_enum_size_warning;
2077 };
2078
2079 #define elf32_arm_tdata(abfd) \
2080 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
2081
2082 #define elf32_arm_local_got_tls_type(abfd) \
2083 (elf32_arm_tdata (abfd)->local_got_tls_type)
2084
2085 static bfd_boolean
2086 elf32_arm_mkobject (bfd *abfd)
2087 {
2088 if (abfd->tdata.any == NULL)
2089 {
2090 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
2091 abfd->tdata.any = bfd_zalloc (abfd, amt);
2092 if (abfd->tdata.any == NULL)
2093 return FALSE;
2094 }
2095 return bfd_elf_mkobject (abfd);
2096 }
2097
2098 /* The ARM linker needs to keep track of the number of relocs that it
2099 decides to copy in check_relocs for each symbol. This is so that
2100 it can discard PC relative relocs if it doesn't need them when
2101 linking with -Bsymbolic. We store the information in a field
2102 extending the regular ELF linker hash table. */
2103
2104 /* This structure keeps track of the number of relocs we have copied
2105 for a given symbol. */
2106 struct elf32_arm_relocs_copied
2107 {
2108 /* Next section. */
2109 struct elf32_arm_relocs_copied * next;
2110 /* A section in dynobj. */
2111 asection * section;
2112 /* Number of relocs copied in this section. */
2113 bfd_size_type count;
2114 /* Number of PC-relative relocs copied in this section. */
2115 bfd_size_type pc_count;
2116 };
2117
2118 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2119
2120 /* Arm ELF linker hash entry. */
2121 struct elf32_arm_link_hash_entry
2122 {
2123 struct elf_link_hash_entry root;
2124
2125 /* Number of PC relative relocs copied for this symbol. */
2126 struct elf32_arm_relocs_copied * relocs_copied;
2127
2128 /* We reference count Thumb references to a PLT entry separately,
2129 so that we can emit the Thumb trampoline only if needed. */
2130 bfd_signed_vma plt_thumb_refcount;
2131
2132 /* Some references from Thumb code may be eliminated by BL->BLX
2133 conversion, so record them separately. */
2134 bfd_signed_vma plt_maybe_thumb_refcount;
2135
2136 /* Since PLT entries have variable size if the Thumb prologue is
2137 used, we need to record the index into .got.plt instead of
2138 recomputing it from the PLT offset. */
2139 bfd_signed_vma plt_got_offset;
2140
2141 #define GOT_UNKNOWN 0
2142 #define GOT_NORMAL 1
2143 #define GOT_TLS_GD 2
2144 #define GOT_TLS_IE 4
2145 unsigned char tls_type;
2146
2147 /* The symbol marking the real symbol location for exported thumb
2148 symbols with Arm stubs. */
2149 struct elf_link_hash_entry *export_glue;
2150 };
2151
2152 /* Traverse an arm ELF linker hash table. */
2153 #define elf32_arm_link_hash_traverse(table, func, info) \
2154 (elf_link_hash_traverse \
2155 (&(table)->root, \
2156 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2157 (info)))
2158
2159 /* Get the ARM elf linker hash table from a link_info structure. */
2160 #define elf32_arm_hash_table(info) \
2161 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2162
2163 /* ARM ELF linker hash table. */
2164 struct elf32_arm_link_hash_table
2165 {
2166 /* The main hash table. */
2167 struct elf_link_hash_table root;
2168
2169 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2170 bfd_size_type thumb_glue_size;
2171
2172 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2173 bfd_size_type arm_glue_size;
2174
2175 /* The size in bytes of the section containing glue for VFP11 erratum
2176 veneers. */
2177 bfd_size_type vfp11_erratum_glue_size;
2178
2179 /* An arbitrary input BFD chosen to hold the glue sections. */
2180 bfd * bfd_of_glue_owner;
2181
2182 /* Nonzero to output a BE8 image. */
2183 int byteswap_code;
2184
2185 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2186 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2187 int target1_is_rel;
2188
2189 /* The relocation to use for R_ARM_TARGET2 relocations. */
2190 int target2_reloc;
2191
2192 /* Nonzero to fix BX instructions for ARMv4 targets. */
2193 int fix_v4bx;
2194
2195 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2196 int use_blx;
2197
2198 /* What sort of code sequences we should look for which may trigger the
2199 VFP11 denorm erratum. */
2200 bfd_arm_vfp11_fix vfp11_fix;
2201
2202 /* Global counter for the number of fixes we have emitted. */
2203 int num_vfp11_fixes;
2204
2205 /* Nonzero to force PIC branch veneers. */
2206 int pic_veneer;
2207
2208 /* The number of bytes in the initial entry in the PLT. */
2209 bfd_size_type plt_header_size;
2210
2211 /* The number of bytes in the subsequent PLT etries. */
2212 bfd_size_type plt_entry_size;
2213
2214 /* True if the target system is VxWorks. */
2215 int vxworks_p;
2216
2217 /* True if the target system is Symbian OS. */
2218 int symbian_p;
2219
2220 /* True if the target uses REL relocations. */
2221 int use_rel;
2222
2223 /* Short-cuts to get to dynamic linker sections. */
2224 asection *sgot;
2225 asection *sgotplt;
2226 asection *srelgot;
2227 asection *splt;
2228 asection *srelplt;
2229 asection *sdynbss;
2230 asection *srelbss;
2231
2232 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2233 asection *srelplt2;
2234
2235 /* Data for R_ARM_TLS_LDM32 relocations. */
2236 union {
2237 bfd_signed_vma refcount;
2238 bfd_vma offset;
2239 } tls_ldm_got;
2240
2241 /* Small local sym to section mapping cache. */
2242 struct sym_sec_cache sym_sec;
2243
2244 /* For convenience in allocate_dynrelocs. */
2245 bfd * obfd;
2246 };
2247
2248 /* Create an entry in an ARM ELF linker hash table. */
2249
2250 static struct bfd_hash_entry *
2251 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2252 struct bfd_hash_table * table,
2253 const char * string)
2254 {
2255 struct elf32_arm_link_hash_entry * ret =
2256 (struct elf32_arm_link_hash_entry *) entry;
2257
2258 /* Allocate the structure if it has not already been allocated by a
2259 subclass. */
2260 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
2261 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2262 if (ret == NULL)
2263 return (struct bfd_hash_entry *) ret;
2264
2265 /* Call the allocation method of the superclass. */
2266 ret = ((struct elf32_arm_link_hash_entry *)
2267 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2268 table, string));
2269 if (ret != NULL)
2270 {
2271 ret->relocs_copied = NULL;
2272 ret->tls_type = GOT_UNKNOWN;
2273 ret->plt_thumb_refcount = 0;
2274 ret->plt_maybe_thumb_refcount = 0;
2275 ret->plt_got_offset = -1;
2276 ret->export_glue = NULL;
2277 }
2278
2279 return (struct bfd_hash_entry *) ret;
2280 }
2281
2282 /* Return true if NAME is the name of the relocation section associated
2283 with S. */
2284
2285 static bfd_boolean
2286 reloc_section_p (struct elf32_arm_link_hash_table *htab,
2287 const char *name, asection *s)
2288 {
2289 if (htab->use_rel)
2290 return CONST_STRNEQ (name, ".rel") && strcmp (s->name, name + 4) == 0;
2291 else
2292 return CONST_STRNEQ (name, ".rela") && strcmp (s->name, name + 5) == 0;
2293 }
2294
2295 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2296 shortcuts to them in our hash table. */
2297
2298 static bfd_boolean
2299 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2300 {
2301 struct elf32_arm_link_hash_table *htab;
2302
2303 htab = elf32_arm_hash_table (info);
2304 /* BPABI objects never have a GOT, or associated sections. */
2305 if (htab->symbian_p)
2306 return TRUE;
2307
2308 if (! _bfd_elf_create_got_section (dynobj, info))
2309 return FALSE;
2310
2311 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2312 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2313 if (!htab->sgot || !htab->sgotplt)
2314 abort ();
2315
2316 htab->srelgot = bfd_make_section_with_flags (dynobj,
2317 RELOC_SECTION (htab, ".got"),
2318 (SEC_ALLOC | SEC_LOAD
2319 | SEC_HAS_CONTENTS
2320 | SEC_IN_MEMORY
2321 | SEC_LINKER_CREATED
2322 | SEC_READONLY));
2323 if (htab->srelgot == NULL
2324 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2325 return FALSE;
2326 return TRUE;
2327 }
2328
2329 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2330 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2331 hash table. */
2332
2333 static bfd_boolean
2334 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2335 {
2336 struct elf32_arm_link_hash_table *htab;
2337
2338 htab = elf32_arm_hash_table (info);
2339 if (!htab->sgot && !create_got_section (dynobj, info))
2340 return FALSE;
2341
2342 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2343 return FALSE;
2344
2345 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2346 htab->srelplt = bfd_get_section_by_name (dynobj,
2347 RELOC_SECTION (htab, ".plt"));
2348 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2349 if (!info->shared)
2350 htab->srelbss = bfd_get_section_by_name (dynobj,
2351 RELOC_SECTION (htab, ".bss"));
2352
2353 if (htab->vxworks_p)
2354 {
2355 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2356 return FALSE;
2357
2358 if (info->shared)
2359 {
2360 htab->plt_header_size = 0;
2361 htab->plt_entry_size
2362 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2363 }
2364 else
2365 {
2366 htab->plt_header_size
2367 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2368 htab->plt_entry_size
2369 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2370 }
2371 }
2372
2373 if (!htab->splt
2374 || !htab->srelplt
2375 || !htab->sdynbss
2376 || (!info->shared && !htab->srelbss))
2377 abort ();
2378
2379 return TRUE;
2380 }
2381
2382 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2383
2384 static void
2385 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2386 struct elf_link_hash_entry *dir,
2387 struct elf_link_hash_entry *ind)
2388 {
2389 struct elf32_arm_link_hash_entry *edir, *eind;
2390
2391 edir = (struct elf32_arm_link_hash_entry *) dir;
2392 eind = (struct elf32_arm_link_hash_entry *) ind;
2393
2394 if (eind->relocs_copied != NULL)
2395 {
2396 if (edir->relocs_copied != NULL)
2397 {
2398 struct elf32_arm_relocs_copied **pp;
2399 struct elf32_arm_relocs_copied *p;
2400
2401 /* Add reloc counts against the indirect sym to the direct sym
2402 list. Merge any entries against the same section. */
2403 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2404 {
2405 struct elf32_arm_relocs_copied *q;
2406
2407 for (q = edir->relocs_copied; q != NULL; q = q->next)
2408 if (q->section == p->section)
2409 {
2410 q->pc_count += p->pc_count;
2411 q->count += p->count;
2412 *pp = p->next;
2413 break;
2414 }
2415 if (q == NULL)
2416 pp = &p->next;
2417 }
2418 *pp = edir->relocs_copied;
2419 }
2420
2421 edir->relocs_copied = eind->relocs_copied;
2422 eind->relocs_copied = NULL;
2423 }
2424
2425 if (ind->root.type == bfd_link_hash_indirect)
2426 {
2427 /* Copy over PLT info. */
2428 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2429 eind->plt_thumb_refcount = 0;
2430 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
2431 eind->plt_maybe_thumb_refcount = 0;
2432
2433 if (dir->got.refcount <= 0)
2434 {
2435 edir->tls_type = eind->tls_type;
2436 eind->tls_type = GOT_UNKNOWN;
2437 }
2438 }
2439
2440 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2441 }
2442
2443 /* Create an ARM elf linker hash table. */
2444
2445 static struct bfd_link_hash_table *
2446 elf32_arm_link_hash_table_create (bfd *abfd)
2447 {
2448 struct elf32_arm_link_hash_table *ret;
2449 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2450
2451 ret = bfd_malloc (amt);
2452 if (ret == NULL)
2453 return NULL;
2454
2455 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2456 elf32_arm_link_hash_newfunc,
2457 sizeof (struct elf32_arm_link_hash_entry)))
2458 {
2459 free (ret);
2460 return NULL;
2461 }
2462
2463 ret->sgot = NULL;
2464 ret->sgotplt = NULL;
2465 ret->srelgot = NULL;
2466 ret->splt = NULL;
2467 ret->srelplt = NULL;
2468 ret->sdynbss = NULL;
2469 ret->srelbss = NULL;
2470 ret->srelplt2 = NULL;
2471 ret->thumb_glue_size = 0;
2472 ret->arm_glue_size = 0;
2473 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2474 ret->vfp11_erratum_glue_size = 0;
2475 ret->num_vfp11_fixes = 0;
2476 ret->bfd_of_glue_owner = NULL;
2477 ret->byteswap_code = 0;
2478 ret->target1_is_rel = 0;
2479 ret->target2_reloc = R_ARM_NONE;
2480 #ifdef FOUR_WORD_PLT
2481 ret->plt_header_size = 16;
2482 ret->plt_entry_size = 16;
2483 #else
2484 ret->plt_header_size = 20;
2485 ret->plt_entry_size = 12;
2486 #endif
2487 ret->fix_v4bx = 0;
2488 ret->use_blx = 0;
2489 ret->vxworks_p = 0;
2490 ret->symbian_p = 0;
2491 ret->use_rel = 1;
2492 ret->sym_sec.abfd = NULL;
2493 ret->obfd = abfd;
2494 ret->tls_ldm_got.refcount = 0;
2495
2496 return &ret->root.root;
2497 }
2498
2499 /* Locate the Thumb encoded calling stub for NAME. */
2500
2501 static struct elf_link_hash_entry *
2502 find_thumb_glue (struct bfd_link_info *link_info,
2503 const char *name,
2504 char **error_message)
2505 {
2506 char *tmp_name;
2507 struct elf_link_hash_entry *hash;
2508 struct elf32_arm_link_hash_table *hash_table;
2509
2510 /* We need a pointer to the armelf specific hash table. */
2511 hash_table = elf32_arm_hash_table (link_info);
2512
2513 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2514 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2515
2516 BFD_ASSERT (tmp_name);
2517
2518 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2519
2520 hash = elf_link_hash_lookup
2521 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2522
2523 if (hash == NULL)
2524 asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
2525 tmp_name, name);
2526
2527 free (tmp_name);
2528
2529 return hash;
2530 }
2531
2532 /* Locate the ARM encoded calling stub for NAME. */
2533
2534 static struct elf_link_hash_entry *
2535 find_arm_glue (struct bfd_link_info *link_info,
2536 const char *name,
2537 char **error_message)
2538 {
2539 char *tmp_name;
2540 struct elf_link_hash_entry *myh;
2541 struct elf32_arm_link_hash_table *hash_table;
2542
2543 /* We need a pointer to the elfarm specific hash table. */
2544 hash_table = elf32_arm_hash_table (link_info);
2545
2546 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2547 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2548
2549 BFD_ASSERT (tmp_name);
2550
2551 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2552
2553 myh = elf_link_hash_lookup
2554 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2555
2556 if (myh == NULL)
2557 asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
2558 tmp_name, name);
2559
2560 free (tmp_name);
2561
2562 return myh;
2563 }
2564
2565 /* ARM->Thumb glue (static images):
2566
2567 .arm
2568 __func_from_arm:
2569 ldr r12, __func_addr
2570 bx r12
2571 __func_addr:
2572 .word func @ behave as if you saw a ARM_32 reloc.
2573
2574 (v5t static images)
2575 .arm
2576 __func_from_arm:
2577 ldr pc, __func_addr
2578 __func_addr:
2579 .word func @ behave as if you saw a ARM_32 reloc.
2580
2581 (relocatable images)
2582 .arm
2583 __func_from_arm:
2584 ldr r12, __func_offset
2585 add r12, r12, pc
2586 bx r12
2587 __func_offset:
2588 .word func - .
2589 */
2590
2591 #define ARM2THUMB_STATIC_GLUE_SIZE 12
2592 static const insn32 a2t1_ldr_insn = 0xe59fc000;
2593 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
2594 static const insn32 a2t3_func_addr_insn = 0x00000001;
2595
2596 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
2597 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
2598 static const insn32 a2t2v5_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 if (globals->use_blx)
2749 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
2750 else
2751 size = ARM2THUMB_STATIC_GLUE_SIZE;
2752
2753 s->size += size;
2754 globals->arm_glue_size += size;
2755
2756 return myh;
2757 }
2758
2759 static void
2760 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2761 struct elf_link_hash_entry *h)
2762 {
2763 const char *name = h->root.root.string;
2764 asection *s;
2765 char *tmp_name;
2766 struct elf_link_hash_entry *myh;
2767 struct bfd_link_hash_entry *bh;
2768 struct elf32_arm_link_hash_table *hash_table;
2769 bfd_vma val;
2770
2771 hash_table = elf32_arm_hash_table (link_info);
2772
2773 BFD_ASSERT (hash_table != NULL);
2774 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2775
2776 s = bfd_get_section_by_name
2777 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2778
2779 BFD_ASSERT (s != NULL);
2780
2781 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2782 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2783
2784 BFD_ASSERT (tmp_name);
2785
2786 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2787
2788 myh = elf_link_hash_lookup
2789 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2790
2791 if (myh != NULL)
2792 {
2793 /* We've already seen this guy. */
2794 free (tmp_name);
2795 return;
2796 }
2797
2798 bh = NULL;
2799 val = hash_table->thumb_glue_size + 1;
2800 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2801 tmp_name, BSF_GLOBAL, s, val,
2802 NULL, TRUE, FALSE, &bh);
2803
2804 /* If we mark it 'Thumb', the disassembler will do a better job. */
2805 myh = (struct elf_link_hash_entry *) bh;
2806 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2807 myh->forced_local = 1;
2808
2809 free (tmp_name);
2810
2811 #define CHANGE_TO_ARM "__%s_change_to_arm"
2812 #define BACK_FROM_ARM "__%s_back_from_arm"
2813
2814 /* Allocate another symbol to mark where we switch to Arm mode. */
2815 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2816 + strlen (CHANGE_TO_ARM) + 1);
2817
2818 BFD_ASSERT (tmp_name);
2819
2820 sprintf (tmp_name, CHANGE_TO_ARM, name);
2821
2822 bh = NULL;
2823 val = hash_table->thumb_glue_size + 4,
2824 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2825 tmp_name, BSF_LOCAL, s, val,
2826 NULL, TRUE, FALSE, &bh);
2827
2828 free (tmp_name);
2829
2830 s->size += THUMB2ARM_GLUE_SIZE;
2831 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2832
2833 return;
2834 }
2835
2836
2837 /* Add an entry to the code/data map for section SEC. */
2838
2839 static void
2840 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
2841 {
2842 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
2843 unsigned int newidx;
2844
2845 if (sec_data->map == NULL)
2846 {
2847 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
2848 sec_data->mapcount = 0;
2849 sec_data->mapsize = 1;
2850 }
2851
2852 newidx = sec_data->mapcount++;
2853
2854 if (sec_data->mapcount > sec_data->mapsize)
2855 {
2856 sec_data->mapsize *= 2;
2857 sec_data->map = bfd_realloc (sec_data->map, sec_data->mapsize
2858 * sizeof (elf32_arm_section_map));
2859 }
2860
2861 sec_data->map[newidx].vma = vma;
2862 sec_data->map[newidx].type = type;
2863 }
2864
2865
2866 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
2867 veneers are handled for now. */
2868
2869 static bfd_vma
2870 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
2871 elf32_vfp11_erratum_list *branch,
2872 bfd *branch_bfd,
2873 asection *branch_sec,
2874 unsigned int offset)
2875 {
2876 asection *s;
2877 struct elf32_arm_link_hash_table *hash_table;
2878 char *tmp_name;
2879 struct elf_link_hash_entry *myh;
2880 struct bfd_link_hash_entry *bh;
2881 bfd_vma val;
2882 struct _arm_elf_section_data *sec_data;
2883 int errcount;
2884 elf32_vfp11_erratum_list *newerr;
2885
2886 hash_table = elf32_arm_hash_table (link_info);
2887
2888 BFD_ASSERT (hash_table != NULL);
2889 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2890
2891 s = bfd_get_section_by_name
2892 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
2893
2894 sec_data = elf32_arm_section_data (s);
2895
2896 BFD_ASSERT (s != NULL);
2897
2898 tmp_name = bfd_malloc ((bfd_size_type) strlen
2899 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
2900
2901 BFD_ASSERT (tmp_name);
2902
2903 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
2904 hash_table->num_vfp11_fixes);
2905
2906 myh = elf_link_hash_lookup
2907 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
2908
2909 BFD_ASSERT (myh == NULL);
2910
2911 bh = NULL;
2912 val = hash_table->vfp11_erratum_glue_size;
2913 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2914 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
2915 NULL, TRUE, FALSE, &bh);
2916
2917 myh = (struct elf_link_hash_entry *) bh;
2918 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2919 myh->forced_local = 1;
2920
2921 /* Link veneer back to calling location. */
2922 errcount = ++(sec_data->erratumcount);
2923 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
2924
2925 newerr->type = VFP11_ERRATUM_ARM_VENEER;
2926 newerr->vma = -1;
2927 newerr->u.v.branch = branch;
2928 newerr->u.v.id = hash_table->num_vfp11_fixes;
2929 branch->u.b.veneer = newerr;
2930
2931 newerr->next = sec_data->erratumlist;
2932 sec_data->erratumlist = newerr;
2933
2934 /* A symbol for the return from the veneer. */
2935 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
2936 hash_table->num_vfp11_fixes);
2937
2938 myh = elf_link_hash_lookup
2939 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
2940
2941 if (myh != NULL)
2942 abort ();
2943
2944 bh = NULL;
2945 val = offset + 4;
2946 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
2947 branch_sec, val, NULL, TRUE, FALSE, &bh);
2948
2949 myh = (struct elf_link_hash_entry *) bh;
2950 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2951 myh->forced_local = 1;
2952
2953 free (tmp_name);
2954
2955 /* Generate a mapping symbol for the veneer section, and explicitly add an
2956 entry for that symbol to the code/data map for the section. */
2957 if (hash_table->vfp11_erratum_glue_size == 0)
2958 {
2959 bh = NULL;
2960 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
2961 ever requires this erratum fix. */
2962 _bfd_generic_link_add_one_symbol (link_info,
2963 hash_table->bfd_of_glue_owner, "$a",
2964 BSF_LOCAL, s, 0, NULL,
2965 TRUE, FALSE, &bh);
2966
2967 myh = (struct elf_link_hash_entry *) bh;
2968 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
2969 myh->forced_local = 1;
2970
2971 /* The elf32_arm_init_maps function only cares about symbols from input
2972 BFDs. We must make a note of this generated mapping symbol
2973 ourselves so that code byteswapping works properly in
2974 elf32_arm_write_section. */
2975 elf32_arm_section_map_add (s, 'a', 0);
2976 }
2977
2978 s->size += VFP11_ERRATUM_VENEER_SIZE;
2979 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
2980 hash_table->num_vfp11_fixes++;
2981
2982 /* The offset of the veneer. */
2983 return val;
2984 }
2985
2986 /* Add the glue sections to ABFD. This function is called from the
2987 linker scripts in ld/emultempl/{armelf}.em. */
2988
2989 bfd_boolean
2990 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
2991 struct bfd_link_info *info)
2992 {
2993 flagword flags;
2994 asection *sec;
2995
2996 /* If we are only performing a partial
2997 link do not bother adding the glue. */
2998 if (info->relocatable)
2999 return TRUE;
3000
3001 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
3002
3003 if (sec == NULL)
3004 {
3005 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
3006 will prevent elf_link_input_bfd() from processing the contents
3007 of this section. */
3008 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3009 | SEC_CODE | SEC_READONLY);
3010
3011 sec = bfd_make_section_with_flags (abfd,
3012 ARM2THUMB_GLUE_SECTION_NAME,
3013 flags);
3014
3015 if (sec == NULL
3016 || !bfd_set_section_alignment (abfd, sec, 2))
3017 return FALSE;
3018
3019 /* Set the gc mark to prevent the section from being removed by garbage
3020 collection, despite the fact that no relocs refer to this section. */
3021 sec->gc_mark = 1;
3022 }
3023
3024 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
3025
3026 if (sec == NULL)
3027 {
3028 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3029 | SEC_CODE | SEC_READONLY);
3030
3031 sec = bfd_make_section_with_flags (abfd,
3032 THUMB2ARM_GLUE_SECTION_NAME,
3033 flags);
3034
3035 if (sec == NULL
3036 || !bfd_set_section_alignment (abfd, sec, 2))
3037 return FALSE;
3038
3039 sec->gc_mark = 1;
3040 }
3041
3042 sec = bfd_get_section_by_name (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME);
3043
3044 if (sec == NULL)
3045 {
3046 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3047 | SEC_CODE | SEC_READONLY);
3048
3049 sec = bfd_make_section_with_flags (abfd,
3050 VFP11_ERRATUM_VENEER_SECTION_NAME,
3051 flags);
3052
3053 if (sec == NULL
3054 || !bfd_set_section_alignment (abfd, sec, 2))
3055 return FALSE;
3056
3057 sec->gc_mark = 1;
3058 }
3059
3060 return TRUE;
3061 }
3062
3063 /* Select a BFD to be used to hold the sections used by the glue code.
3064 This function is called from the linker scripts in ld/emultempl/
3065 {armelf/pe}.em */
3066
3067 bfd_boolean
3068 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
3069 {
3070 struct elf32_arm_link_hash_table *globals;
3071
3072 /* If we are only performing a partial link
3073 do not bother getting a bfd to hold the glue. */
3074 if (info->relocatable)
3075 return TRUE;
3076
3077 /* Make sure we don't attach the glue sections to a dynamic object. */
3078 BFD_ASSERT (!(abfd->flags & DYNAMIC));
3079
3080 globals = elf32_arm_hash_table (info);
3081
3082 BFD_ASSERT (globals != NULL);
3083
3084 if (globals->bfd_of_glue_owner != NULL)
3085 return TRUE;
3086
3087 /* Save the bfd for later use. */
3088 globals->bfd_of_glue_owner = abfd;
3089
3090 return TRUE;
3091 }
3092
3093 static void check_use_blx(struct elf32_arm_link_hash_table *globals)
3094 {
3095 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
3096 Tag_CPU_arch) > 2)
3097 globals->use_blx = 1;
3098 }
3099
3100 bfd_boolean
3101 bfd_elf32_arm_process_before_allocation (bfd *abfd,
3102 struct bfd_link_info *link_info)
3103 {
3104 Elf_Internal_Shdr *symtab_hdr;
3105 Elf_Internal_Rela *internal_relocs = NULL;
3106 Elf_Internal_Rela *irel, *irelend;
3107 bfd_byte *contents = NULL;
3108
3109 asection *sec;
3110 struct elf32_arm_link_hash_table *globals;
3111
3112 /* If we are only performing a partial link do not bother
3113 to construct any glue. */
3114 if (link_info->relocatable)
3115 return TRUE;
3116
3117 /* Here we have a bfd that is to be included on the link. We have a hook
3118 to do reloc rummaging, before section sizes are nailed down. */
3119 globals = elf32_arm_hash_table (link_info);
3120 check_use_blx (globals);
3121
3122 BFD_ASSERT (globals != NULL);
3123 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3124
3125 if (globals->byteswap_code && !bfd_big_endian (abfd))
3126 {
3127 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
3128 abfd);
3129 return FALSE;
3130 }
3131
3132 /* Rummage around all the relocs and map the glue vectors. */
3133 sec = abfd->sections;
3134
3135 if (sec == NULL)
3136 return TRUE;
3137
3138 for (; sec != NULL; sec = sec->next)
3139 {
3140 if (sec->reloc_count == 0)
3141 continue;
3142
3143 if ((sec->flags & SEC_EXCLUDE) != 0)
3144 continue;
3145
3146 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3147
3148 /* Load the relocs. */
3149 internal_relocs
3150 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
3151 (Elf_Internal_Rela *) NULL, FALSE);
3152
3153 if (internal_relocs == NULL)
3154 goto error_return;
3155
3156 irelend = internal_relocs + sec->reloc_count;
3157 for (irel = internal_relocs; irel < irelend; irel++)
3158 {
3159 long r_type;
3160 unsigned long r_index;
3161
3162 struct elf_link_hash_entry *h;
3163
3164 r_type = ELF32_R_TYPE (irel->r_info);
3165 r_index = ELF32_R_SYM (irel->r_info);
3166
3167 /* These are the only relocation types we care about. */
3168 if ( r_type != R_ARM_PC24
3169 && r_type != R_ARM_PLT32
3170 && r_type != R_ARM_CALL
3171 && r_type != R_ARM_JUMP24
3172 && r_type != R_ARM_THM_CALL
3173 && r_type != R_ARM_THM_JUMP24)
3174 continue;
3175
3176 /* Get the section contents if we haven't done so already. */
3177 if (contents == NULL)
3178 {
3179 /* Get cached copy if it exists. */
3180 if (elf_section_data (sec)->this_hdr.contents != NULL)
3181 contents = elf_section_data (sec)->this_hdr.contents;
3182 else
3183 {
3184 /* Go get them off disk. */
3185 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3186 goto error_return;
3187 }
3188 }
3189
3190 /* If the relocation is not against a symbol it cannot concern us. */
3191 h = NULL;
3192
3193 /* We don't care about local symbols. */
3194 if (r_index < symtab_hdr->sh_info)
3195 continue;
3196
3197 /* This is an external symbol. */
3198 r_index -= symtab_hdr->sh_info;
3199 h = (struct elf_link_hash_entry *)
3200 elf_sym_hashes (abfd)[r_index];
3201
3202 /* If the relocation is against a static symbol it must be within
3203 the current section and so cannot be a cross ARM/Thumb relocation. */
3204 if (h == NULL)
3205 continue;
3206
3207 /* If the call will go through a PLT entry then we do not need
3208 glue. */
3209 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
3210 continue;
3211
3212 switch (r_type)
3213 {
3214 case R_ARM_PC24:
3215 case R_ARM_PLT32:
3216 case R_ARM_CALL:
3217 case R_ARM_JUMP24:
3218 /* This one is a call from arm code. We need to look up
3219 the target of the call. If it is a thumb target, we
3220 insert glue. */
3221 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
3222 && !(r_type == R_ARM_CALL && globals->use_blx))
3223 record_arm_to_thumb_glue (link_info, h);
3224 break;
3225
3226 case R_ARM_THM_CALL:
3227 case R_ARM_THM_JUMP24:
3228 /* This one is a call from thumb code. We look
3229 up the target of the call. If it is not a thumb
3230 target, we insert glue. */
3231 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC
3232 && !(globals->use_blx && r_type == R_ARM_THM_CALL)
3233 && h->root.type != bfd_link_hash_undefweak)
3234 record_thumb_to_arm_glue (link_info, h);
3235 break;
3236
3237 default:
3238 abort ();
3239 }
3240 }
3241
3242 if (contents != NULL
3243 && elf_section_data (sec)->this_hdr.contents != contents)
3244 free (contents);
3245 contents = NULL;
3246
3247 if (internal_relocs != NULL
3248 && elf_section_data (sec)->relocs != internal_relocs)
3249 free (internal_relocs);
3250 internal_relocs = NULL;
3251 }
3252
3253 return TRUE;
3254
3255 error_return:
3256 if (contents != NULL
3257 && elf_section_data (sec)->this_hdr.contents != contents)
3258 free (contents);
3259 if (internal_relocs != NULL
3260 && elf_section_data (sec)->relocs != internal_relocs)
3261 free (internal_relocs);
3262
3263 return FALSE;
3264 }
3265 #endif
3266
3267
3268 /* Initialise maps of ARM/Thumb/data for input BFDs. */
3269
3270 void
3271 bfd_elf32_arm_init_maps (bfd *abfd)
3272 {
3273 Elf_Internal_Sym *isymbuf;
3274 Elf_Internal_Shdr *hdr;
3275 unsigned int i, localsyms;
3276
3277 if ((abfd->flags & DYNAMIC) != 0)
3278 return;
3279
3280 hdr = &elf_tdata (abfd)->symtab_hdr;
3281 localsyms = hdr->sh_info;
3282
3283 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3284 should contain the number of local symbols, which should come before any
3285 global symbols. Mapping symbols are always local. */
3286 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
3287 NULL);
3288
3289 /* No internal symbols read? Skip this BFD. */
3290 if (isymbuf == NULL)
3291 return;
3292
3293 for (i = 0; i < localsyms; i++)
3294 {
3295 Elf_Internal_Sym *isym = &isymbuf[i];
3296 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3297 const char *name;
3298
3299 if (sec != NULL
3300 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3301 {
3302 name = bfd_elf_string_from_elf_section (abfd,
3303 hdr->sh_link, isym->st_name);
3304
3305 if (bfd_is_arm_special_symbol_name (name,
3306 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
3307 elf32_arm_section_map_add (sec, name[1], isym->st_value);
3308 }
3309 }
3310 }
3311
3312
3313 void
3314 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
3315 {
3316 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3317 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
3318
3319 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
3320 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
3321 {
3322 switch (globals->vfp11_fix)
3323 {
3324 case BFD_ARM_VFP11_FIX_DEFAULT:
3325 case BFD_ARM_VFP11_FIX_NONE:
3326 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3327 break;
3328
3329 default:
3330 /* Give a warning, but do as the user requests anyway. */
3331 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
3332 "workaround is not necessary for target architecture"), obfd);
3333 }
3334 }
3335 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
3336 /* For earlier architectures, we might need the workaround, but do not
3337 enable it by default. If users is running with broken hardware, they
3338 must enable the erratum fix explicitly. */
3339 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
3340 }
3341
3342
3343 enum bfd_arm_vfp11_pipe {
3344 VFP11_FMAC,
3345 VFP11_LS,
3346 VFP11_DS,
3347 VFP11_BAD
3348 };
3349
3350 /* Return a VFP register number. This is encoded as RX:X for single-precision
3351 registers, or X:RX for double-precision registers, where RX is the group of
3352 four bits in the instruction encoding and X is the single extension bit.
3353 RX and X fields are specified using their lowest (starting) bit. The return
3354 value is:
3355
3356 0...31: single-precision registers s0...s31
3357 32...63: double-precision registers d0...d31.
3358
3359 Although X should be zero for VFP11 (encoding d0...d15 only), we might
3360 encounter VFP3 instructions, so we allow the full range for DP registers. */
3361
3362 static unsigned int
3363 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
3364 unsigned int x)
3365 {
3366 if (is_double)
3367 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
3368 else
3369 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
3370 }
3371
3372 /* Set bits in *WMASK according to a register number REG as encoded by
3373 bfd_arm_vfp11_regno(). Ignore d16-d31. */
3374
3375 static void
3376 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
3377 {
3378 if (reg < 32)
3379 *wmask |= 1 << reg;
3380 else if (reg < 48)
3381 *wmask |= 3 << ((reg - 32) * 2);
3382 }
3383
3384 /* Return TRUE if WMASK overwrites anything in REGS. */
3385
3386 static bfd_boolean
3387 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
3388 {
3389 int i;
3390
3391 for (i = 0; i < numregs; i++)
3392 {
3393 unsigned int reg = regs[i];
3394
3395 if (reg < 32 && (wmask & (1 << reg)) != 0)
3396 return TRUE;
3397
3398 reg -= 32;
3399
3400 if (reg >= 16)
3401 continue;
3402
3403 if ((wmask & (3 << (reg * 2))) != 0)
3404 return TRUE;
3405 }
3406
3407 return FALSE;
3408 }
3409
3410 /* In this function, we're interested in two things: finding input registers
3411 for VFP data-processing instructions, and finding the set of registers which
3412 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
3413 hold the written set, so FLDM etc. are easy to deal with (we're only
3414 interested in 32 SP registers or 16 dp registers, due to the VFP version
3415 implemented by the chip in question). DP registers are marked by setting
3416 both SP registers in the write mask). */
3417
3418 static enum bfd_arm_vfp11_pipe
3419 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
3420 int *numregs)
3421 {
3422 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
3423 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
3424
3425 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
3426 {
3427 unsigned int pqrs;
3428 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3429 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3430
3431 pqrs = ((insn & 0x00800000) >> 20)
3432 | ((insn & 0x00300000) >> 19)
3433 | ((insn & 0x00000040) >> 6);
3434
3435 switch (pqrs)
3436 {
3437 case 0: /* fmac[sd]. */
3438 case 1: /* fnmac[sd]. */
3439 case 2: /* fmsc[sd]. */
3440 case 3: /* fnmsc[sd]. */
3441 pipe = VFP11_FMAC;
3442 bfd_arm_vfp11_write_mask (destmask, fd);
3443 regs[0] = fd;
3444 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3445 regs[2] = fm;
3446 *numregs = 3;
3447 break;
3448
3449 case 4: /* fmul[sd]. */
3450 case 5: /* fnmul[sd]. */
3451 case 6: /* fadd[sd]. */
3452 case 7: /* fsub[sd]. */
3453 pipe = VFP11_FMAC;
3454 goto vfp_binop;
3455
3456 case 8: /* fdiv[sd]. */
3457 pipe = VFP11_DS;
3458 vfp_binop:
3459 bfd_arm_vfp11_write_mask (destmask, fd);
3460 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
3461 regs[1] = fm;
3462 *numregs = 2;
3463 break;
3464
3465 case 15: /* extended opcode. */
3466 {
3467 unsigned int extn = ((insn >> 15) & 0x1e)
3468 | ((insn >> 7) & 1);
3469
3470 switch (extn)
3471 {
3472 case 0: /* fcpy[sd]. */
3473 case 1: /* fabs[sd]. */
3474 case 2: /* fneg[sd]. */
3475 case 8: /* fcmp[sd]. */
3476 case 9: /* fcmpe[sd]. */
3477 case 10: /* fcmpz[sd]. */
3478 case 11: /* fcmpez[sd]. */
3479 case 16: /* fuito[sd]. */
3480 case 17: /* fsito[sd]. */
3481 case 24: /* ftoui[sd]. */
3482 case 25: /* ftouiz[sd]. */
3483 case 26: /* ftosi[sd]. */
3484 case 27: /* ftosiz[sd]. */
3485 /* These instructions will not bounce due to underflow. */
3486 *numregs = 0;
3487 pipe = VFP11_FMAC;
3488 break;
3489
3490 case 3: /* fsqrt[sd]. */
3491 /* fsqrt cannot underflow, but it can (perhaps) overwrite
3492 registers to cause the erratum in previous instructions. */
3493 bfd_arm_vfp11_write_mask (destmask, fd);
3494 pipe = VFP11_DS;
3495 break;
3496
3497 case 15: /* fcvt{ds,sd}. */
3498 {
3499 int rnum = 0;
3500
3501 bfd_arm_vfp11_write_mask (destmask, fd);
3502
3503 /* Only FCVTSD can underflow. */
3504 if ((insn & 0x100) != 0)
3505 regs[rnum++] = fm;
3506
3507 *numregs = rnum;
3508
3509 pipe = VFP11_FMAC;
3510 }
3511 break;
3512
3513 default:
3514 return VFP11_BAD;
3515 }
3516 }
3517 break;
3518
3519 default:
3520 return VFP11_BAD;
3521 }
3522 }
3523 /* Two-register transfer. */
3524 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
3525 {
3526 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
3527
3528 if ((insn & 0x100000) == 0)
3529 {
3530 if (is_double)
3531 bfd_arm_vfp11_write_mask (destmask, fm);
3532 else
3533 {
3534 bfd_arm_vfp11_write_mask (destmask, fm);
3535 bfd_arm_vfp11_write_mask (destmask, fm + 1);
3536 }
3537 }
3538
3539 pipe = VFP11_LS;
3540 }
3541 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
3542 {
3543 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
3544 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
3545
3546 switch (puw)
3547 {
3548 case 0: /* Two-reg transfer. We should catch these above. */
3549 abort ();
3550
3551 case 2: /* fldm[sdx]. */
3552 case 3:
3553 case 5:
3554 {
3555 unsigned int i, offset = insn & 0xff;
3556
3557 if (is_double)
3558 offset >>= 1;
3559
3560 for (i = fd; i < fd + offset; i++)
3561 bfd_arm_vfp11_write_mask (destmask, i);
3562 }
3563 break;
3564
3565 case 4: /* fld[sd]. */
3566 case 6:
3567 bfd_arm_vfp11_write_mask (destmask, fd);
3568 break;
3569
3570 default:
3571 return VFP11_BAD;
3572 }
3573
3574 pipe = VFP11_LS;
3575 }
3576 /* Single-register transfer. Note L==0. */
3577 else if ((insn & 0x0f100e10) == 0x0e000a10)
3578 {
3579 unsigned int opcode = (insn >> 21) & 7;
3580 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
3581
3582 switch (opcode)
3583 {
3584 case 0: /* fmsr/fmdlr. */
3585 case 1: /* fmdhr. */
3586 /* Mark fmdhr and fmdlr as writing to the whole of the DP
3587 destination register. I don't know if this is exactly right,
3588 but it is the conservative choice. */
3589 bfd_arm_vfp11_write_mask (destmask, fn);
3590 break;
3591
3592 case 7: /* fmxr. */
3593 break;
3594 }
3595
3596 pipe = VFP11_LS;
3597 }
3598
3599 return pipe;
3600 }
3601
3602
3603 static int elf32_arm_compare_mapping (const void * a, const void * b);
3604
3605
3606 /* Look for potentially-troublesome code sequences which might trigger the
3607 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
3608 (available from ARM) for details of the erratum. A short version is
3609 described in ld.texinfo. */
3610
3611 bfd_boolean
3612 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
3613 {
3614 asection *sec;
3615 bfd_byte *contents = NULL;
3616 int state = 0;
3617 int regs[3], numregs = 0;
3618 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
3619 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
3620
3621 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
3622 The states transition as follows:
3623
3624 0 -> 1 (vector) or 0 -> 2 (scalar)
3625 A VFP FMAC-pipeline instruction has been seen. Fill
3626 regs[0]..regs[numregs-1] with its input operands. Remember this
3627 instruction in 'first_fmac'.
3628
3629 1 -> 2
3630 Any instruction, except for a VFP instruction which overwrites
3631 regs[*].
3632
3633 1 -> 3 [ -> 0 ] or
3634 2 -> 3 [ -> 0 ]
3635 A VFP instruction has been seen which overwrites any of regs[*].
3636 We must make a veneer! Reset state to 0 before examining next
3637 instruction.
3638
3639 2 -> 0
3640 If we fail to match anything in state 2, reset to state 0 and reset
3641 the instruction pointer to the instruction after 'first_fmac'.
3642
3643 If the VFP11 vector mode is in use, there must be at least two unrelated
3644 instructions between anti-dependent VFP11 instructions to properly avoid
3645 triggering the erratum, hence the use of the extra state 1.
3646 */
3647
3648 /* If we are only performing a partial link do not bother
3649 to construct any glue. */
3650 if (link_info->relocatable)
3651 return TRUE;
3652
3653 /* We should have chosen a fix type by the time we get here. */
3654 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
3655
3656 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
3657 return TRUE;
3658
3659 /* Skip if this bfd does not correspond to an ELF image. */
3660 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
3661 return TRUE;
3662
3663 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3664 {
3665 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
3666 struct _arm_elf_section_data *sec_data;
3667
3668 /* If we don't have executable progbits, we're not interested in this
3669 section. Also skip if section is to be excluded. */
3670 if (elf_section_type (sec) != SHT_PROGBITS
3671 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
3672 || (sec->flags & SEC_EXCLUDE) != 0
3673 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
3674 continue;
3675
3676 sec_data = elf32_arm_section_data (sec);
3677
3678 if (sec_data->mapcount == 0)
3679 continue;
3680
3681 if (elf_section_data (sec)->this_hdr.contents != NULL)
3682 contents = elf_section_data (sec)->this_hdr.contents;
3683 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
3684 goto error_return;
3685
3686 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
3687 elf32_arm_compare_mapping);
3688
3689 for (span = 0; span < sec_data->mapcount; span++)
3690 {
3691 unsigned int span_start = sec_data->map[span].vma;
3692 unsigned int span_end = (span == sec_data->mapcount - 1)
3693 ? sec->size : sec_data->map[span + 1].vma;
3694 char span_type = sec_data->map[span].type;
3695
3696 /* FIXME: Only ARM mode is supported at present. We may need to
3697 support Thumb-2 mode also at some point. */
3698 if (span_type != 'a')
3699 continue;
3700
3701 for (i = span_start; i < span_end;)
3702 {
3703 unsigned int next_i = i + 4;
3704 unsigned int insn = bfd_big_endian (abfd)
3705 ? (contents[i] << 24)
3706 | (contents[i + 1] << 16)
3707 | (contents[i + 2] << 8)
3708 | contents[i + 3]
3709 : (contents[i + 3] << 24)
3710 | (contents[i + 2] << 16)
3711 | (contents[i + 1] << 8)
3712 | contents[i];
3713 unsigned int writemask = 0;
3714 enum bfd_arm_vfp11_pipe pipe;
3715
3716 switch (state)
3717 {
3718 case 0:
3719 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
3720 &numregs);
3721 /* I'm assuming the VFP11 erratum can trigger with denorm
3722 operands on either the FMAC or the DS pipeline. This might
3723 lead to slightly overenthusiastic veneer insertion. */
3724 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
3725 {
3726 state = use_vector ? 1 : 2;
3727 first_fmac = i;
3728 veneer_of_insn = insn;
3729 }
3730 break;
3731
3732 case 1:
3733 {
3734 int other_regs[3], other_numregs;
3735 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3736 other_regs,
3737 &other_numregs);
3738 if (pipe != VFP11_BAD
3739 && bfd_arm_vfp11_antidependency (writemask, regs,
3740 numregs))
3741 state = 3;
3742 else
3743 state = 2;
3744 }
3745 break;
3746
3747 case 2:
3748 {
3749 int other_regs[3], other_numregs;
3750 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
3751 other_regs,
3752 &other_numregs);
3753 if (pipe != VFP11_BAD
3754 && bfd_arm_vfp11_antidependency (writemask, regs,
3755 numregs))
3756 state = 3;
3757 else
3758 {
3759 state = 0;
3760 next_i = first_fmac + 4;
3761 }
3762 }
3763 break;
3764
3765 case 3:
3766 abort (); /* Should be unreachable. */
3767 }
3768
3769 if (state == 3)
3770 {
3771 elf32_vfp11_erratum_list *newerr
3772 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
3773 int errcount;
3774
3775 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
3776
3777 newerr->u.b.vfp_insn = veneer_of_insn;
3778
3779 switch (span_type)
3780 {
3781 case 'a':
3782 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
3783 break;
3784
3785 default:
3786 abort ();
3787 }
3788
3789 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
3790 first_fmac);
3791
3792 newerr->vma = -1;
3793
3794 newerr->next = sec_data->erratumlist;
3795 sec_data->erratumlist = newerr;
3796
3797 state = 0;
3798 }
3799
3800 i = next_i;
3801 }
3802 }
3803
3804 if (contents != NULL
3805 && elf_section_data (sec)->this_hdr.contents != contents)
3806 free (contents);
3807 contents = NULL;
3808 }
3809
3810 return TRUE;
3811
3812 error_return:
3813 if (contents != NULL
3814 && elf_section_data (sec)->this_hdr.contents != contents)
3815 free (contents);
3816
3817 return FALSE;
3818 }
3819
3820 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
3821 after sections have been laid out, using specially-named symbols. */
3822
3823 void
3824 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
3825 struct bfd_link_info *link_info)
3826 {
3827 asection *sec;
3828 struct elf32_arm_link_hash_table *globals;
3829 char *tmp_name;
3830
3831 if (link_info->relocatable)
3832 return;
3833
3834 /* Skip if this bfd does not correspond to an ELF image. */
3835 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
3836 return;
3837
3838 globals = elf32_arm_hash_table (link_info);
3839
3840 tmp_name = bfd_malloc ((bfd_size_type) strlen
3841 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
3842
3843 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3844 {
3845 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
3846 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
3847
3848 for (; errnode != NULL; errnode = errnode->next)
3849 {
3850 struct elf_link_hash_entry *myh;
3851 bfd_vma vma;
3852
3853 switch (errnode->type)
3854 {
3855 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
3856 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
3857 /* Find veneer symbol. */
3858 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
3859 errnode->u.b.veneer->u.v.id);
3860
3861 myh = elf_link_hash_lookup
3862 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
3863
3864 if (myh == NULL)
3865 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
3866 "`%s'"), abfd, tmp_name);
3867
3868 vma = myh->root.u.def.section->output_section->vma
3869 + myh->root.u.def.section->output_offset
3870 + myh->root.u.def.value;
3871
3872 errnode->u.b.veneer->vma = vma;
3873 break;
3874
3875 case VFP11_ERRATUM_ARM_VENEER:
3876 case VFP11_ERRATUM_THUMB_VENEER:
3877 /* Find return location. */
3878 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
3879 errnode->u.v.id);
3880
3881 myh = elf_link_hash_lookup
3882 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
3883
3884 if (myh == NULL)
3885 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
3886 "`%s'"), abfd, tmp_name);
3887
3888 vma = myh->root.u.def.section->output_section->vma
3889 + myh->root.u.def.section->output_offset
3890 + myh->root.u.def.value;
3891
3892 errnode->u.v.branch->vma = vma;
3893 break;
3894
3895 default:
3896 abort ();
3897 }
3898 }
3899 }
3900
3901 free (tmp_name);
3902 }
3903
3904
3905 /* Set target relocation values needed during linking. */
3906
3907 void
3908 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
3909 struct bfd_link_info *link_info,
3910 int target1_is_rel,
3911 char * target2_type,
3912 int fix_v4bx,
3913 int use_blx,
3914 bfd_arm_vfp11_fix vfp11_fix,
3915 int no_enum_warn, int pic_veneer)
3916 {
3917 struct elf32_arm_link_hash_table *globals;
3918
3919 globals = elf32_arm_hash_table (link_info);
3920
3921 globals->target1_is_rel = target1_is_rel;
3922 if (strcmp (target2_type, "rel") == 0)
3923 globals->target2_reloc = R_ARM_REL32;
3924 else if (strcmp (target2_type, "abs") == 0)
3925 globals->target2_reloc = R_ARM_ABS32;
3926 else if (strcmp (target2_type, "got-rel") == 0)
3927 globals->target2_reloc = R_ARM_GOT_PREL;
3928 else
3929 {
3930 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
3931 target2_type);
3932 }
3933 globals->fix_v4bx = fix_v4bx;
3934 globals->use_blx |= use_blx;
3935 globals->vfp11_fix = vfp11_fix;
3936 globals->pic_veneer = pic_veneer;
3937
3938 elf32_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3939 }
3940
3941 /* The thumb form of a long branch is a bit finicky, because the offset
3942 encoding is split over two fields, each in it's own instruction. They
3943 can occur in any order. So given a thumb form of long branch, and an
3944 offset, insert the offset into the thumb branch and return finished
3945 instruction.
3946
3947 It takes two thumb instructions to encode the target address. Each has
3948 11 bits to invest. The upper 11 bits are stored in one (identified by
3949 H-0.. see below), the lower 11 bits are stored in the other (identified
3950 by H-1).
3951
3952 Combine together and shifted left by 1 (it's a half word address) and
3953 there you have it.
3954
3955 Op: 1111 = F,
3956 H-0, upper address-0 = 000
3957 Op: 1111 = F,
3958 H-1, lower address-0 = 800
3959
3960 They can be ordered either way, but the arm tools I've seen always put
3961 the lower one first. It probably doesn't matter. krk@cygnus.com
3962
3963 XXX: Actually the order does matter. The second instruction (H-1)
3964 moves the computed address into the PC, so it must be the second one
3965 in the sequence. The problem, however is that whilst little endian code
3966 stores the instructions in HI then LOW order, big endian code does the
3967 reverse. nickc@cygnus.com. */
3968
3969 #define LOW_HI_ORDER 0xF800F000
3970 #define HI_LOW_ORDER 0xF000F800
3971
3972 static insn32
3973 insert_thumb_branch (insn32 br_insn, int rel_off)
3974 {
3975 unsigned int low_bits;
3976 unsigned int high_bits;
3977
3978 BFD_ASSERT ((rel_off & 1) != 1);
3979
3980 rel_off >>= 1; /* Half word aligned address. */
3981 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
3982 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
3983
3984 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
3985 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
3986 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
3987 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
3988 else
3989 /* FIXME: abort is probably not the right call. krk@cygnus.com */
3990 abort (); /* Error - not a valid branch instruction form. */
3991
3992 return br_insn;
3993 }
3994
3995
3996 /* Store an Arm insn into an output section not processed by
3997 elf32_arm_write_section. */
3998
3999 static void
4000 put_arm_insn (struct elf32_arm_link_hash_table *htab,
4001 bfd * output_bfd, bfd_vma val, void * ptr)
4002 {
4003 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4004 bfd_putl32 (val, ptr);
4005 else
4006 bfd_putb32 (val, ptr);
4007 }
4008
4009
4010 /* Store a 16-bit Thumb insn into an output section not processed by
4011 elf32_arm_write_section. */
4012
4013 static void
4014 put_thumb_insn (struct elf32_arm_link_hash_table *htab,
4015 bfd * output_bfd, bfd_vma val, void * ptr)
4016 {
4017 if (htab->byteswap_code != bfd_little_endian (output_bfd))
4018 bfd_putl16 (val, ptr);
4019 else
4020 bfd_putb16 (val, ptr);
4021 }
4022
4023
4024 /* Thumb code calling an ARM function. */
4025
4026 static int
4027 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
4028 const char * name,
4029 bfd * input_bfd,
4030 bfd * output_bfd,
4031 asection * input_section,
4032 bfd_byte * hit_data,
4033 asection * sym_sec,
4034 bfd_vma offset,
4035 bfd_signed_vma addend,
4036 bfd_vma val,
4037 char **error_message)
4038 {
4039 asection * s = 0;
4040 bfd_vma my_offset;
4041 unsigned long int tmp;
4042 long int ret_offset;
4043 struct elf_link_hash_entry * myh;
4044 struct elf32_arm_link_hash_table * globals;
4045
4046 myh = find_thumb_glue (info, name, error_message);
4047 if (myh == NULL)
4048 return FALSE;
4049
4050 globals = elf32_arm_hash_table (info);
4051
4052 BFD_ASSERT (globals != NULL);
4053 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4054
4055 my_offset = myh->root.u.def.value;
4056
4057 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4058 THUMB2ARM_GLUE_SECTION_NAME);
4059
4060 BFD_ASSERT (s != NULL);
4061 BFD_ASSERT (s->contents != NULL);
4062 BFD_ASSERT (s->output_section != NULL);
4063
4064 if ((my_offset & 0x01) == 0x01)
4065 {
4066 if (sym_sec != NULL
4067 && sym_sec->owner != NULL
4068 && !INTERWORK_FLAG (sym_sec->owner))
4069 {
4070 (*_bfd_error_handler)
4071 (_("%B(%s): warning: interworking not enabled.\n"
4072 " first occurrence: %B: thumb call to arm"),
4073 sym_sec->owner, input_bfd, name);
4074
4075 return FALSE;
4076 }
4077
4078 --my_offset;
4079 myh->root.u.def.value = my_offset;
4080
4081 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
4082 s->contents + my_offset);
4083
4084 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
4085 s->contents + my_offset + 2);
4086
4087 ret_offset =
4088 /* Address of destination of the stub. */
4089 ((bfd_signed_vma) val)
4090 - ((bfd_signed_vma)
4091 /* Offset from the start of the current section
4092 to the start of the stubs. */
4093 (s->output_offset
4094 /* Offset of the start of this stub from the start of the stubs. */
4095 + my_offset
4096 /* Address of the start of the current section. */
4097 + s->output_section->vma)
4098 /* The branch instruction is 4 bytes into the stub. */
4099 + 4
4100 /* ARM branches work from the pc of the instruction + 8. */
4101 + 8);
4102
4103 put_arm_insn (globals, output_bfd,
4104 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
4105 s->contents + my_offset + 4);
4106 }
4107
4108 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
4109
4110 /* Now go back and fix up the original BL insn to point to here. */
4111 ret_offset =
4112 /* Address of where the stub is located. */
4113 (s->output_section->vma + s->output_offset + my_offset)
4114 /* Address of where the BL is located. */
4115 - (input_section->output_section->vma + input_section->output_offset
4116 + offset)
4117 /* Addend in the relocation. */
4118 - addend
4119 /* Biassing for PC-relative addressing. */
4120 - 8;
4121
4122 tmp = bfd_get_32 (input_bfd, hit_data
4123 - input_section->vma);
4124
4125 bfd_put_32 (output_bfd,
4126 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
4127 hit_data - input_section->vma);
4128
4129 return TRUE;
4130 }
4131
4132 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
4133
4134 static struct elf_link_hash_entry *
4135 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
4136 const char * name,
4137 bfd * input_bfd,
4138 bfd * output_bfd,
4139 asection * sym_sec,
4140 bfd_vma val,
4141 asection *s,
4142 char **error_message)
4143 {
4144 bfd_vma my_offset;
4145 long int ret_offset;
4146 struct elf_link_hash_entry * myh;
4147 struct elf32_arm_link_hash_table * globals;
4148
4149 myh = find_arm_glue (info, name, error_message);
4150 if (myh == NULL)
4151 return NULL;
4152
4153 globals = elf32_arm_hash_table (info);
4154
4155 BFD_ASSERT (globals != NULL);
4156 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4157
4158 my_offset = myh->root.u.def.value;
4159
4160 if ((my_offset & 0x01) == 0x01)
4161 {
4162 if (sym_sec != NULL
4163 && sym_sec->owner != NULL
4164 && !INTERWORK_FLAG (sym_sec->owner))
4165 {
4166 (*_bfd_error_handler)
4167 (_("%B(%s): warning: interworking not enabled.\n"
4168 " first occurrence: %B: arm call to thumb"),
4169 sym_sec->owner, input_bfd, name);
4170 }
4171
4172 --my_offset;
4173 myh->root.u.def.value = my_offset;
4174
4175 if (info->shared || globals->root.is_relocatable_executable
4176 || globals->pic_veneer)
4177 {
4178 /* For relocatable objects we can't use absolute addresses,
4179 so construct the address from a relative offset. */
4180 /* TODO: If the offset is small it's probably worth
4181 constructing the address with adds. */
4182 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
4183 s->contents + my_offset);
4184 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
4185 s->contents + my_offset + 4);
4186 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
4187 s->contents + my_offset + 8);
4188 /* Adjust the offset by 4 for the position of the add,
4189 and 8 for the pipeline offset. */
4190 ret_offset = (val - (s->output_offset
4191 + s->output_section->vma
4192 + my_offset + 12))
4193 | 1;
4194 bfd_put_32 (output_bfd, ret_offset,
4195 s->contents + my_offset + 12);
4196 }
4197 else if (globals->use_blx)
4198 {
4199 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
4200 s->contents + my_offset);
4201
4202 /* It's a thumb address. Add the low order bit. */
4203 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
4204 s->contents + my_offset + 4);
4205 }
4206 else
4207 {
4208 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
4209 s->contents + my_offset);
4210
4211 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
4212 s->contents + my_offset + 4);
4213
4214 /* It's a thumb address. Add the low order bit. */
4215 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
4216 s->contents + my_offset + 8);
4217 }
4218 }
4219
4220 BFD_ASSERT (my_offset <= globals->arm_glue_size);
4221
4222 return myh;
4223 }
4224
4225 /* Arm code calling a Thumb function. */
4226
4227 static int
4228 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
4229 const char * name,
4230 bfd * input_bfd,
4231 bfd * output_bfd,
4232 asection * input_section,
4233 bfd_byte * hit_data,
4234 asection * sym_sec,
4235 bfd_vma offset,
4236 bfd_signed_vma addend,
4237 bfd_vma val,
4238 char **error_message)
4239 {
4240 unsigned long int tmp;
4241 bfd_vma my_offset;
4242 asection * s;
4243 long int ret_offset;
4244 struct elf_link_hash_entry * myh;
4245 struct elf32_arm_link_hash_table * globals;
4246
4247 globals = elf32_arm_hash_table (info);
4248
4249 BFD_ASSERT (globals != NULL);
4250 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4251
4252 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4253 ARM2THUMB_GLUE_SECTION_NAME);
4254 BFD_ASSERT (s != NULL);
4255 BFD_ASSERT (s->contents != NULL);
4256 BFD_ASSERT (s->output_section != NULL);
4257
4258 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
4259 sym_sec, val, s, error_message);
4260 if (!myh)
4261 return FALSE;
4262
4263 my_offset = myh->root.u.def.value;
4264 tmp = bfd_get_32 (input_bfd, hit_data);
4265 tmp = tmp & 0xFF000000;
4266
4267 /* Somehow these are both 4 too far, so subtract 8. */
4268 ret_offset = (s->output_offset
4269 + my_offset
4270 + s->output_section->vma
4271 - (input_section->output_offset
4272 + input_section->output_section->vma
4273 + offset + addend)
4274 - 8);
4275
4276 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
4277
4278 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
4279
4280 return TRUE;
4281 }
4282
4283 /* Populate Arm stub for an exported Thumb function. */
4284
4285 static bfd_boolean
4286 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
4287 {
4288 struct bfd_link_info * info = (struct bfd_link_info *) inf;
4289 asection * s;
4290 struct elf_link_hash_entry * myh;
4291 struct elf32_arm_link_hash_entry *eh;
4292 struct elf32_arm_link_hash_table * globals;
4293 asection *sec;
4294 bfd_vma val;
4295 char *error_message;
4296
4297 eh = elf32_arm_hash_entry(h);
4298 /* Allocate stubs for exported Thumb functions on v4t. */
4299 if (eh->export_glue == NULL)
4300 return TRUE;
4301
4302 globals = elf32_arm_hash_table (info);
4303
4304 BFD_ASSERT (globals != NULL);
4305 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4306
4307 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
4308 ARM2THUMB_GLUE_SECTION_NAME);
4309 BFD_ASSERT (s != NULL);
4310 BFD_ASSERT (s->contents != NULL);
4311 BFD_ASSERT (s->output_section != NULL);
4312
4313 sec = eh->export_glue->root.u.def.section;
4314
4315 BFD_ASSERT (sec->output_section != NULL);
4316
4317 val = eh->export_glue->root.u.def.value + sec->output_offset
4318 + sec->output_section->vma;
4319 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
4320 h->root.u.def.section->owner,
4321 globals->obfd, sec, val, s,
4322 &error_message);
4323 BFD_ASSERT (myh);
4324 return TRUE;
4325 }
4326
4327 /* Generate Arm stubs for exported Thumb symbols. */
4328 static void
4329 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
4330 struct bfd_link_info *link_info)
4331 {
4332 struct elf32_arm_link_hash_table * globals;
4333
4334 if (!link_info)
4335 return;
4336
4337 globals = elf32_arm_hash_table (link_info);
4338 /* If blx is available then exported Thumb symbols are OK and there is
4339 nothing to do. */
4340 if (globals->use_blx)
4341 return;
4342
4343 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
4344 link_info);
4345 }
4346
4347 /* Some relocations map to different relocations depending on the
4348 target. Return the real relocation. */
4349 static int
4350 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
4351 int r_type)
4352 {
4353 switch (r_type)
4354 {
4355 case R_ARM_TARGET1:
4356 if (globals->target1_is_rel)
4357 return R_ARM_REL32;
4358 else
4359 return R_ARM_ABS32;
4360
4361 case R_ARM_TARGET2:
4362 return globals->target2_reloc;
4363
4364 default:
4365 return r_type;
4366 }
4367 }
4368
4369 /* Return the base VMA address which should be subtracted from real addresses
4370 when resolving @dtpoff relocation.
4371 This is PT_TLS segment p_vaddr. */
4372
4373 static bfd_vma
4374 dtpoff_base (struct bfd_link_info *info)
4375 {
4376 /* If tls_sec is NULL, we should have signalled an error already. */
4377 if (elf_hash_table (info)->tls_sec == NULL)
4378 return 0;
4379 return elf_hash_table (info)->tls_sec->vma;
4380 }
4381
4382 /* Return the relocation value for @tpoff relocation
4383 if STT_TLS virtual address is ADDRESS. */
4384
4385 static bfd_vma
4386 tpoff (struct bfd_link_info *info, bfd_vma address)
4387 {
4388 struct elf_link_hash_table *htab = elf_hash_table (info);
4389 bfd_vma base;
4390
4391 /* If tls_sec is NULL, we should have signalled an error already. */
4392 if (htab->tls_sec == NULL)
4393 return 0;
4394 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
4395 return address - htab->tls_sec->vma + base;
4396 }
4397
4398 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
4399 VALUE is the relocation value. */
4400
4401 static bfd_reloc_status_type
4402 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
4403 {
4404 if (value > 0xfff)
4405 return bfd_reloc_overflow;
4406
4407 value |= bfd_get_32 (abfd, data) & 0xfffff000;
4408 bfd_put_32 (abfd, value, data);
4409 return bfd_reloc_ok;
4410 }
4411
4412 /* For a given value of n, calculate the value of G_n as required to
4413 deal with group relocations. We return it in the form of an
4414 encoded constant-and-rotation, together with the final residual. If n is
4415 specified as less than zero, then final_residual is filled with the
4416 input value and no further action is performed. */
4417
4418 static bfd_vma
4419 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
4420 {
4421 int current_n;
4422 bfd_vma g_n;
4423 bfd_vma encoded_g_n = 0;
4424 bfd_vma residual = value; /* Also known as Y_n. */
4425
4426 for (current_n = 0; current_n <= n; current_n++)
4427 {
4428 int shift;
4429
4430 /* Calculate which part of the value to mask. */
4431 if (residual == 0)
4432 shift = 0;
4433 else
4434 {
4435 int msb;
4436
4437 /* Determine the most significant bit in the residual and
4438 align the resulting value to a 2-bit boundary. */
4439 for (msb = 30; msb >= 0; msb -= 2)
4440 if (residual & (3 << msb))
4441 break;
4442
4443 /* The desired shift is now (msb - 6), or zero, whichever
4444 is the greater. */
4445 shift = msb - 6;
4446 if (shift < 0)
4447 shift = 0;
4448 }
4449
4450 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
4451 g_n = residual & (0xff << shift);
4452 encoded_g_n = (g_n >> shift)
4453 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
4454
4455 /* Calculate the residual for the next time around. */
4456 residual &= ~g_n;
4457 }
4458
4459 *final_residual = residual;
4460
4461 return encoded_g_n;
4462 }
4463
4464 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
4465 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
4466 static int
4467 identify_add_or_sub(bfd_vma insn)
4468 {
4469 int opcode = insn & 0x1e00000;
4470
4471 if (opcode == 1 << 23) /* ADD */
4472 return 1;
4473
4474 if (opcode == 1 << 22) /* SUB */
4475 return -1;
4476
4477 return 0;
4478 }
4479
4480 /* Determine if we're dealing with a Thumb-2 object. */
4481
4482 static int using_thumb2 (struct elf32_arm_link_hash_table *globals)
4483 {
4484 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4485 Tag_CPU_arch);
4486 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
4487 }
4488
4489 /* Perform a relocation as part of a final link. */
4490
4491 static bfd_reloc_status_type
4492 elf32_arm_final_link_relocate (reloc_howto_type * howto,
4493 bfd * input_bfd,
4494 bfd * output_bfd,
4495 asection * input_section,
4496 bfd_byte * contents,
4497 Elf_Internal_Rela * rel,
4498 bfd_vma value,
4499 struct bfd_link_info * info,
4500 asection * sym_sec,
4501 const char * sym_name,
4502 int sym_flags,
4503 struct elf_link_hash_entry * h,
4504 bfd_boolean * unresolved_reloc_p,
4505 char **error_message)
4506 {
4507 unsigned long r_type = howto->type;
4508 unsigned long r_symndx;
4509 bfd_byte * hit_data = contents + rel->r_offset;
4510 bfd * dynobj = NULL;
4511 Elf_Internal_Shdr * symtab_hdr;
4512 struct elf_link_hash_entry ** sym_hashes;
4513 bfd_vma * local_got_offsets;
4514 asection * sgot = NULL;
4515 asection * splt = NULL;
4516 asection * sreloc = NULL;
4517 bfd_vma addend;
4518 bfd_signed_vma signed_addend;
4519 struct elf32_arm_link_hash_table * globals;
4520
4521 globals = elf32_arm_hash_table (info);
4522
4523 /* Some relocation type map to different relocations depending on the
4524 target. We pick the right one here. */
4525 r_type = arm_real_reloc_type (globals, r_type);
4526 if (r_type != howto->type)
4527 howto = elf32_arm_howto_from_type (r_type);
4528
4529 /* If the start address has been set, then set the EF_ARM_HASENTRY
4530 flag. Setting this more than once is redundant, but the cost is
4531 not too high, and it keeps the code simple.
4532
4533 The test is done here, rather than somewhere else, because the
4534 start address is only set just before the final link commences.
4535
4536 Note - if the user deliberately sets a start address of 0, the
4537 flag will not be set. */
4538 if (bfd_get_start_address (output_bfd) != 0)
4539 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
4540
4541 dynobj = elf_hash_table (info)->dynobj;
4542 if (dynobj)
4543 {
4544 sgot = bfd_get_section_by_name (dynobj, ".got");
4545 splt = bfd_get_section_by_name (dynobj, ".plt");
4546 }
4547 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
4548 sym_hashes = elf_sym_hashes (input_bfd);
4549 local_got_offsets = elf_local_got_offsets (input_bfd);
4550 r_symndx = ELF32_R_SYM (rel->r_info);
4551
4552 if (globals->use_rel)
4553 {
4554 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
4555
4556 if (addend & ((howto->src_mask + 1) >> 1))
4557 {
4558 signed_addend = -1;
4559 signed_addend &= ~ howto->src_mask;
4560 signed_addend |= addend;
4561 }
4562 else
4563 signed_addend = addend;
4564 }
4565 else
4566 addend = signed_addend = rel->r_addend;
4567
4568 switch (r_type)
4569 {
4570 case R_ARM_NONE:
4571 /* We don't need to find a value for this symbol. It's just a
4572 marker. */
4573 *unresolved_reloc_p = FALSE;
4574 return bfd_reloc_ok;
4575
4576 case R_ARM_ABS12:
4577 if (!globals->vxworks_p)
4578 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4579
4580 case R_ARM_PC24:
4581 case R_ARM_ABS32:
4582 case R_ARM_ABS32_NOI:
4583 case R_ARM_REL32:
4584 case R_ARM_REL32_NOI:
4585 case R_ARM_CALL:
4586 case R_ARM_JUMP24:
4587 case R_ARM_XPC25:
4588 case R_ARM_PREL31:
4589 case R_ARM_PLT32:
4590 /* Handle relocations which should use the PLT entry. ABS32/REL32
4591 will use the symbol's value, which may point to a PLT entry, but we
4592 don't need to handle that here. If we created a PLT entry, all
4593 branches in this object should go to it. */
4594 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
4595 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
4596 && h != NULL
4597 && splt != NULL
4598 && h->plt.offset != (bfd_vma) -1)
4599 {
4600 /* If we've created a .plt section, and assigned a PLT entry to
4601 this function, it should not be known to bind locally. If
4602 it were, we would have cleared the PLT entry. */
4603 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
4604
4605 value = (splt->output_section->vma
4606 + splt->output_offset
4607 + h->plt.offset);
4608 *unresolved_reloc_p = FALSE;
4609 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4610 contents, rel->r_offset, value,
4611 rel->r_addend);
4612 }
4613
4614 /* When generating a shared object or relocatable executable, these
4615 relocations are copied into the output file to be resolved at
4616 run time. */
4617 if ((info->shared || globals->root.is_relocatable_executable)
4618 && (input_section->flags & SEC_ALLOC)
4619 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
4620 || !SYMBOL_CALLS_LOCAL (info, h))
4621 && (h == NULL
4622 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4623 || h->root.type != bfd_link_hash_undefweak)
4624 && r_type != R_ARM_PC24
4625 && r_type != R_ARM_CALL
4626 && r_type != R_ARM_JUMP24
4627 && r_type != R_ARM_PREL31
4628 && r_type != R_ARM_PLT32)
4629 {
4630 Elf_Internal_Rela outrel;
4631 bfd_byte *loc;
4632 bfd_boolean skip, relocate;
4633
4634 *unresolved_reloc_p = FALSE;
4635
4636 if (sreloc == NULL)
4637 {
4638 const char * name;
4639
4640 name = (bfd_elf_string_from_elf_section
4641 (input_bfd,
4642 elf_elfheader (input_bfd)->e_shstrndx,
4643 elf_section_data (input_section)->rel_hdr.sh_name));
4644 if (name == NULL)
4645 return bfd_reloc_notsupported;
4646
4647 BFD_ASSERT (reloc_section_p (globals, name, input_section));
4648
4649 sreloc = bfd_get_section_by_name (dynobj, name);
4650 BFD_ASSERT (sreloc != NULL);
4651 }
4652
4653 skip = FALSE;
4654 relocate = FALSE;
4655
4656 outrel.r_addend = addend;
4657 outrel.r_offset =
4658 _bfd_elf_section_offset (output_bfd, info, input_section,
4659 rel->r_offset);
4660 if (outrel.r_offset == (bfd_vma) -1)
4661 skip = TRUE;
4662 else if (outrel.r_offset == (bfd_vma) -2)
4663 skip = TRUE, relocate = TRUE;
4664 outrel.r_offset += (input_section->output_section->vma
4665 + input_section->output_offset);
4666
4667 if (skip)
4668 memset (&outrel, 0, sizeof outrel);
4669 else if (h != NULL
4670 && h->dynindx != -1
4671 && (!info->shared
4672 || !info->symbolic
4673 || !h->def_regular))
4674 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4675 else
4676 {
4677 int symbol;
4678
4679 /* This symbol is local, or marked to become local. */
4680 if (sym_flags == STT_ARM_TFUNC)
4681 value |= 1;
4682 if (globals->symbian_p)
4683 {
4684 asection *osec;
4685
4686 /* On Symbian OS, the data segment and text segement
4687 can be relocated independently. Therefore, we
4688 must indicate the segment to which this
4689 relocation is relative. The BPABI allows us to
4690 use any symbol in the right segment; we just use
4691 the section symbol as it is convenient. (We
4692 cannot use the symbol given by "h" directly as it
4693 will not appear in the dynamic symbol table.)
4694
4695 Note that the dynamic linker ignores the section
4696 symbol value, so we don't subtract osec->vma
4697 from the emitted reloc addend. */
4698 if (sym_sec)
4699 osec = sym_sec->output_section;
4700 else
4701 osec = input_section->output_section;
4702 symbol = elf_section_data (osec)->dynindx;
4703 if (symbol == 0)
4704 {
4705 struct elf_link_hash_table *htab = elf_hash_table (info);
4706
4707 if ((osec->flags & SEC_READONLY) == 0
4708 && htab->data_index_section != NULL)
4709 osec = htab->data_index_section;
4710 else
4711 osec = htab->text_index_section;
4712 symbol = elf_section_data (osec)->dynindx;
4713 }
4714 BFD_ASSERT (symbol != 0);
4715 }
4716 else
4717 /* On SVR4-ish systems, the dynamic loader cannot
4718 relocate the text and data segments independently,
4719 so the symbol does not matter. */
4720 symbol = 0;
4721 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
4722 if (globals->use_rel)
4723 relocate = TRUE;
4724 else
4725 outrel.r_addend += value;
4726 }
4727
4728 loc = sreloc->contents;
4729 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
4730 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4731
4732 /* If this reloc is against an external symbol, we do not want to
4733 fiddle with the addend. Otherwise, we need to include the symbol
4734 value so that it becomes an addend for the dynamic reloc. */
4735 if (! relocate)
4736 return bfd_reloc_ok;
4737
4738 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4739 contents, rel->r_offset, value,
4740 (bfd_vma) 0);
4741 }
4742 else switch (r_type)
4743 {
4744 case R_ARM_ABS12:
4745 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
4746
4747 case R_ARM_XPC25: /* Arm BLX instruction. */
4748 case R_ARM_CALL:
4749 case R_ARM_JUMP24:
4750 case R_ARM_PC24: /* Arm B/BL instruction */
4751 case R_ARM_PLT32:
4752 if (r_type == R_ARM_XPC25)
4753 {
4754 /* Check for Arm calling Arm function. */
4755 /* FIXME: Should we translate the instruction into a BL
4756 instruction instead ? */
4757 if (sym_flags != STT_ARM_TFUNC)
4758 (*_bfd_error_handler)
4759 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
4760 input_bfd,
4761 h ? h->root.root.string : "(local)");
4762 }
4763 else if (r_type != R_ARM_CALL || !globals->use_blx)
4764 {
4765 /* Check for Arm calling Thumb function. */
4766 if (sym_flags == STT_ARM_TFUNC)
4767 {
4768 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
4769 output_bfd, input_section,
4770 hit_data, sym_sec, rel->r_offset,
4771 signed_addend, value,
4772 error_message))
4773 return bfd_reloc_ok;
4774 else
4775 return bfd_reloc_dangerous;
4776 }
4777 }
4778
4779 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
4780 where:
4781 S is the address of the symbol in the relocation.
4782 P is address of the instruction being relocated.
4783 A is the addend (extracted from the instruction) in bytes.
4784
4785 S is held in 'value'.
4786 P is the base address of the section containing the
4787 instruction plus the offset of the reloc into that
4788 section, ie:
4789 (input_section->output_section->vma +
4790 input_section->output_offset +
4791 rel->r_offset).
4792 A is the addend, converted into bytes, ie:
4793 (signed_addend * 4)
4794
4795 Note: None of these operations have knowledge of the pipeline
4796 size of the processor, thus it is up to the assembler to
4797 encode this information into the addend. */
4798 value -= (input_section->output_section->vma
4799 + input_section->output_offset);
4800 value -= rel->r_offset;
4801 if (globals->use_rel)
4802 value += (signed_addend << howto->size);
4803 else
4804 /* RELA addends do not have to be adjusted by howto->size. */
4805 value += signed_addend;
4806
4807 signed_addend = value;
4808 signed_addend >>= howto->rightshift;
4809
4810 /* A branch to an undefined weak symbol is turned into a jump to
4811 the next instruction. */
4812 if (h && h->root.type == bfd_link_hash_undefweak)
4813 {
4814 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000)
4815 | 0x0affffff;
4816 }
4817 else
4818 {
4819 /* Perform a signed range check. */
4820 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
4821 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
4822 return bfd_reloc_overflow;
4823
4824 addend = (value & 2);
4825
4826 value = (signed_addend & howto->dst_mask)
4827 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
4828
4829 /* Set the H bit in the BLX instruction. */
4830 if (sym_flags == STT_ARM_TFUNC)
4831 {
4832 if (addend)
4833 value |= (1 << 24);
4834 else
4835 value &= ~(bfd_vma)(1 << 24);
4836 }
4837 if (r_type == R_ARM_CALL)
4838 {
4839 /* Select the correct instruction (BL or BLX). */
4840 if (sym_flags == STT_ARM_TFUNC)
4841 value |= (1 << 28);
4842 else
4843 {
4844 value &= ~(bfd_vma)(1 << 28);
4845 value |= (1 << 24);
4846 }
4847 }
4848 }
4849 break;
4850
4851 case R_ARM_ABS32:
4852 value += addend;
4853 if (sym_flags == STT_ARM_TFUNC)
4854 value |= 1;
4855 break;
4856
4857 case R_ARM_ABS32_NOI:
4858 value += addend;
4859 break;
4860
4861 case R_ARM_REL32:
4862 value += addend;
4863 if (sym_flags == STT_ARM_TFUNC)
4864 value |= 1;
4865 value -= (input_section->output_section->vma
4866 + input_section->output_offset + rel->r_offset);
4867 break;
4868
4869 case R_ARM_REL32_NOI:
4870 value += addend;
4871 value -= (input_section->output_section->vma
4872 + input_section->output_offset + rel->r_offset);
4873 break;
4874
4875 case R_ARM_PREL31:
4876 value -= (input_section->output_section->vma
4877 + input_section->output_offset + rel->r_offset);
4878 value += signed_addend;
4879 if (! h || h->root.type != bfd_link_hash_undefweak)
4880 {
4881 /* Check for overflow */
4882 if ((value ^ (value >> 1)) & (1 << 30))
4883 return bfd_reloc_overflow;
4884 }
4885 value &= 0x7fffffff;
4886 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
4887 if (sym_flags == STT_ARM_TFUNC)
4888 value |= 1;
4889 break;
4890 }
4891
4892 bfd_put_32 (input_bfd, value, hit_data);
4893 return bfd_reloc_ok;
4894
4895 case R_ARM_ABS8:
4896 value += addend;
4897 if ((long) value > 0x7f || (long) value < -0x80)
4898 return bfd_reloc_overflow;
4899
4900 bfd_put_8 (input_bfd, value, hit_data);
4901 return bfd_reloc_ok;
4902
4903 case R_ARM_ABS16:
4904 value += addend;
4905
4906 if ((long) value > 0x7fff || (long) value < -0x8000)
4907 return bfd_reloc_overflow;
4908
4909 bfd_put_16 (input_bfd, value, hit_data);
4910 return bfd_reloc_ok;
4911
4912 case R_ARM_THM_ABS5:
4913 /* Support ldr and str instructions for the thumb. */
4914 if (globals->use_rel)
4915 {
4916 /* Need to refetch addend. */
4917 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
4918 /* ??? Need to determine shift amount from operand size. */
4919 addend >>= howto->rightshift;
4920 }
4921 value += addend;
4922
4923 /* ??? Isn't value unsigned? */
4924 if ((long) value > 0x1f || (long) value < -0x10)
4925 return bfd_reloc_overflow;
4926
4927 /* ??? Value needs to be properly shifted into place first. */
4928 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
4929 bfd_put_16 (input_bfd, value, hit_data);
4930 return bfd_reloc_ok;
4931
4932 case R_ARM_THM_ALU_PREL_11_0:
4933 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
4934 {
4935 bfd_vma insn;
4936 bfd_signed_vma relocation;
4937
4938 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4939 | bfd_get_16 (input_bfd, hit_data + 2);
4940
4941 if (globals->use_rel)
4942 {
4943 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
4944 | ((insn & (1 << 26)) >> 15);
4945 if (insn & 0xf00000)
4946 signed_addend = -signed_addend;
4947 }
4948
4949 relocation = value + signed_addend;
4950 relocation -= (input_section->output_section->vma
4951 + input_section->output_offset
4952 + rel->r_offset);
4953
4954 value = abs (relocation);
4955
4956 if (value >= 0x1000)
4957 return bfd_reloc_overflow;
4958
4959 insn = (insn & 0xfb0f8f00) | (value & 0xff)
4960 | ((value & 0x700) << 4)
4961 | ((value & 0x800) << 15);
4962 if (relocation < 0)
4963 insn |= 0xa00000;
4964
4965 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4966 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4967
4968 return bfd_reloc_ok;
4969 }
4970
4971 case R_ARM_THM_PC12:
4972 /* Corresponds to: ldr.w reg, [pc, #offset]. */
4973 {
4974 bfd_vma insn;
4975 bfd_signed_vma relocation;
4976
4977 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
4978 | bfd_get_16 (input_bfd, hit_data + 2);
4979
4980 if (globals->use_rel)
4981 {
4982 signed_addend = insn & 0xfff;
4983 if (!(insn & (1 << 23)))
4984 signed_addend = -signed_addend;
4985 }
4986
4987 relocation = value + signed_addend;
4988 relocation -= (input_section->output_section->vma
4989 + input_section->output_offset
4990 + rel->r_offset);
4991
4992 value = abs (relocation);
4993
4994 if (value >= 0x1000)
4995 return bfd_reloc_overflow;
4996
4997 insn = (insn & 0xff7ff000) | value;
4998 if (relocation >= 0)
4999 insn |= (1 << 23);
5000
5001 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5002 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5003
5004 return bfd_reloc_ok;
5005 }
5006
5007 case R_ARM_THM_XPC22:
5008 case R_ARM_THM_CALL:
5009 case R_ARM_THM_JUMP24:
5010 /* Thumb BL (branch long instruction). */
5011 {
5012 bfd_vma relocation;
5013 bfd_vma reloc_sign;
5014 bfd_boolean overflow = FALSE;
5015 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5016 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5017 bfd_signed_vma reloc_signed_max;
5018 bfd_signed_vma reloc_signed_min;
5019 bfd_vma check;
5020 bfd_signed_vma signed_check;
5021 int bitsize;
5022 int thumb2 = using_thumb2 (globals);
5023
5024 /* A branch to an undefined weak symbol is turned into a jump to
5025 the next instruction. */
5026 if (h && h->root.type == bfd_link_hash_undefweak)
5027 {
5028 bfd_put_16 (input_bfd, 0xe000, hit_data);
5029 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
5030 return bfd_reloc_ok;
5031 }
5032
5033 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
5034 with Thumb-1) involving the J1 and J2 bits. */
5035 if (globals->use_rel)
5036 {
5037 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
5038 bfd_vma upper = upper_insn & 0x3ff;
5039 bfd_vma lower = lower_insn & 0x7ff;
5040 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
5041 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
5042 bfd_vma i1 = j1 ^ s ? 0 : 1;
5043 bfd_vma i2 = j2 ^ s ? 0 : 1;
5044
5045 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
5046 /* Sign extend. */
5047 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
5048
5049 signed_addend = addend;
5050 }
5051
5052 if (r_type == R_ARM_THM_XPC22)
5053 {
5054 /* Check for Thumb to Thumb call. */
5055 /* FIXME: Should we translate the instruction into a BL
5056 instruction instead ? */
5057 if (sym_flags == STT_ARM_TFUNC)
5058 (*_bfd_error_handler)
5059 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
5060 input_bfd,
5061 h ? h->root.root.string : "(local)");
5062 }
5063 else
5064 {
5065 /* If it is not a call to Thumb, assume call to Arm.
5066 If it is a call relative to a section name, then it is not a
5067 function call at all, but rather a long jump. Calls through
5068 the PLT do not require stubs. */
5069 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
5070 && (h == NULL || splt == NULL
5071 || h->plt.offset == (bfd_vma) -1))
5072 {
5073 if (globals->use_blx && r_type == R_ARM_THM_CALL)
5074 {
5075 /* Convert BL to BLX. */
5076 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5077 }
5078 else if (elf32_thumb_to_arm_stub
5079 (info, sym_name, input_bfd, output_bfd, input_section,
5080 hit_data, sym_sec, rel->r_offset, signed_addend, value,
5081 error_message))
5082 return bfd_reloc_ok;
5083 else
5084 return bfd_reloc_dangerous;
5085 }
5086 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
5087 && r_type == R_ARM_THM_CALL)
5088 {
5089 /* Make sure this is a BL. */
5090 lower_insn |= 0x1800;
5091 }
5092 }
5093
5094 /* Handle calls via the PLT. */
5095 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
5096 {
5097 value = (splt->output_section->vma
5098 + splt->output_offset
5099 + h->plt.offset);
5100 if (globals->use_blx && r_type == R_ARM_THM_CALL)
5101 {
5102 /* If the Thumb BLX instruction is available, convert the
5103 BL to a BLX instruction to call the ARM-mode PLT entry. */
5104 lower_insn = (lower_insn & ~0x1000) | 0x0800;
5105 }
5106 else
5107 /* Target the Thumb stub before the ARM PLT entry. */
5108 value -= PLT_THUMB_STUB_SIZE;
5109 *unresolved_reloc_p = FALSE;
5110 }
5111
5112 relocation = value + signed_addend;
5113
5114 relocation -= (input_section->output_section->vma
5115 + input_section->output_offset
5116 + rel->r_offset);
5117
5118 check = relocation >> howto->rightshift;
5119
5120 /* If this is a signed value, the rightshift just dropped
5121 leading 1 bits (assuming twos complement). */
5122 if ((bfd_signed_vma) relocation >= 0)
5123 signed_check = check;
5124 else
5125 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
5126
5127 /* Calculate the permissable maximum and minimum values for
5128 this relocation according to whether we're relocating for
5129 Thumb-2 or not. */
5130 bitsize = howto->bitsize;
5131 if (!thumb2)
5132 bitsize -= 2;
5133 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
5134 reloc_signed_min = ~reloc_signed_max;
5135
5136 /* Assumes two's complement. */
5137 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5138 overflow = TRUE;
5139
5140 if ((lower_insn & 0x5000) == 0x4000)
5141 /* For a BLX instruction, make sure that the relocation is rounded up
5142 to a word boundary. This follows the semantics of the instruction
5143 which specifies that bit 1 of the target address will come from bit
5144 1 of the base address. */
5145 relocation = (relocation + 2) & ~ 3;
5146
5147 /* Put RELOCATION back into the insn. Assumes two's complement.
5148 We use the Thumb-2 encoding, which is safe even if dealing with
5149 a Thumb-1 instruction by virtue of our overflow check above. */
5150 reloc_sign = (signed_check < 0) ? 1 : 0;
5151 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
5152 | ((relocation >> 12) & 0x3ff)
5153 | (reloc_sign << 10);
5154 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
5155 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
5156 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
5157 | ((relocation >> 1) & 0x7ff);
5158
5159 /* Put the relocated value back in the object file: */
5160 bfd_put_16 (input_bfd, upper_insn, hit_data);
5161 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5162
5163 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5164 }
5165 break;
5166
5167 case R_ARM_THM_JUMP19:
5168 /* Thumb32 conditional branch instruction. */
5169 {
5170 bfd_vma relocation;
5171 bfd_boolean overflow = FALSE;
5172 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
5173 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
5174 bfd_signed_vma reloc_signed_max = 0xffffe;
5175 bfd_signed_vma reloc_signed_min = -0x100000;
5176 bfd_signed_vma signed_check;
5177
5178 /* Need to refetch the addend, reconstruct the top three bits,
5179 and squish the two 11 bit pieces together. */
5180 if (globals->use_rel)
5181 {
5182 bfd_vma S = (upper_insn & 0x0400) >> 10;
5183 bfd_vma upper = (upper_insn & 0x003f);
5184 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
5185 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
5186 bfd_vma lower = (lower_insn & 0x07ff);
5187
5188 upper |= J1 << 6;
5189 upper |= J2 << 7;
5190 upper |= (!S) << 8;
5191 upper -= 0x0100; /* Sign extend. */
5192
5193 addend = (upper << 12) | (lower << 1);
5194 signed_addend = addend;
5195 }
5196
5197 /* Handle calls via the PLT. */
5198 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
5199 {
5200 value = (splt->output_section->vma
5201 + splt->output_offset
5202 + h->plt.offset);
5203 /* Target the Thumb stub before the ARM PLT entry. */
5204 value -= PLT_THUMB_STUB_SIZE;
5205 *unresolved_reloc_p = FALSE;
5206 }
5207
5208 /* ??? Should handle interworking? GCC might someday try to
5209 use this for tail calls. */
5210
5211 relocation = value + signed_addend;
5212 relocation -= (input_section->output_section->vma
5213 + input_section->output_offset
5214 + rel->r_offset);
5215 signed_check = (bfd_signed_vma) relocation;
5216
5217 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5218 overflow = TRUE;
5219
5220 /* Put RELOCATION back into the insn. */
5221 {
5222 bfd_vma S = (relocation & 0x00100000) >> 20;
5223 bfd_vma J2 = (relocation & 0x00080000) >> 19;
5224 bfd_vma J1 = (relocation & 0x00040000) >> 18;
5225 bfd_vma hi = (relocation & 0x0003f000) >> 12;
5226 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
5227
5228 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
5229 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
5230 }
5231
5232 /* Put the relocated value back in the object file: */
5233 bfd_put_16 (input_bfd, upper_insn, hit_data);
5234 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
5235
5236 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
5237 }
5238
5239 case R_ARM_THM_JUMP11:
5240 case R_ARM_THM_JUMP8:
5241 case R_ARM_THM_JUMP6:
5242 /* Thumb B (branch) instruction). */
5243 {
5244 bfd_signed_vma relocation;
5245 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
5246 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
5247 bfd_signed_vma signed_check;
5248
5249 /* CZB cannot jump backward. */
5250 if (r_type == R_ARM_THM_JUMP6)
5251 reloc_signed_min = 0;
5252
5253 if (globals->use_rel)
5254 {
5255 /* Need to refetch addend. */
5256 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
5257 if (addend & ((howto->src_mask + 1) >> 1))
5258 {
5259 signed_addend = -1;
5260 signed_addend &= ~ howto->src_mask;
5261 signed_addend |= addend;
5262 }
5263 else
5264 signed_addend = addend;
5265 /* The value in the insn has been right shifted. We need to
5266 undo this, so that we can perform the address calculation
5267 in terms of bytes. */
5268 signed_addend <<= howto->rightshift;
5269 }
5270 relocation = value + signed_addend;
5271
5272 relocation -= (input_section->output_section->vma
5273 + input_section->output_offset
5274 + rel->r_offset);
5275
5276 relocation >>= howto->rightshift;
5277 signed_check = relocation;
5278
5279 if (r_type == R_ARM_THM_JUMP6)
5280 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
5281 else
5282 relocation &= howto->dst_mask;
5283 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
5284
5285 bfd_put_16 (input_bfd, relocation, hit_data);
5286
5287 /* Assumes two's complement. */
5288 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
5289 return bfd_reloc_overflow;
5290
5291 return bfd_reloc_ok;
5292 }
5293
5294 case R_ARM_ALU_PCREL7_0:
5295 case R_ARM_ALU_PCREL15_8:
5296 case R_ARM_ALU_PCREL23_15:
5297 {
5298 bfd_vma insn;
5299 bfd_vma relocation;
5300
5301 insn = bfd_get_32 (input_bfd, hit_data);
5302 if (globals->use_rel)
5303 {
5304 /* Extract the addend. */
5305 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
5306 signed_addend = addend;
5307 }
5308 relocation = value + signed_addend;
5309
5310 relocation -= (input_section->output_section->vma
5311 + input_section->output_offset
5312 + rel->r_offset);
5313 insn = (insn & ~0xfff)
5314 | ((howto->bitpos << 7) & 0xf00)
5315 | ((relocation >> howto->bitpos) & 0xff);
5316 bfd_put_32 (input_bfd, value, hit_data);
5317 }
5318 return bfd_reloc_ok;
5319
5320 case R_ARM_GNU_VTINHERIT:
5321 case R_ARM_GNU_VTENTRY:
5322 return bfd_reloc_ok;
5323
5324 case R_ARM_GOTOFF32:
5325 /* Relocation is relative to the start of the
5326 global offset table. */
5327
5328 BFD_ASSERT (sgot != NULL);
5329 if (sgot == NULL)
5330 return bfd_reloc_notsupported;
5331
5332 /* If we are addressing a Thumb function, we need to adjust the
5333 address by one, so that attempts to call the function pointer will
5334 correctly interpret it as Thumb code. */
5335 if (sym_flags == STT_ARM_TFUNC)
5336 value += 1;
5337
5338 /* Note that sgot->output_offset is not involved in this
5339 calculation. We always want the start of .got. If we
5340 define _GLOBAL_OFFSET_TABLE in a different way, as is
5341 permitted by the ABI, we might have to change this
5342 calculation. */
5343 value -= sgot->output_section->vma;
5344 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5345 contents, rel->r_offset, value,
5346 rel->r_addend);
5347
5348 case R_ARM_GOTPC:
5349 /* Use global offset table as symbol value. */
5350 BFD_ASSERT (sgot != NULL);
5351
5352 if (sgot == NULL)
5353 return bfd_reloc_notsupported;
5354
5355 *unresolved_reloc_p = FALSE;
5356 value = sgot->output_section->vma;
5357 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5358 contents, rel->r_offset, value,
5359 rel->r_addend);
5360
5361 case R_ARM_GOT32:
5362 case R_ARM_GOT_PREL:
5363 /* Relocation is to the entry for this symbol in the
5364 global offset table. */
5365 if (sgot == NULL)
5366 return bfd_reloc_notsupported;
5367
5368 if (h != NULL)
5369 {
5370 bfd_vma off;
5371 bfd_boolean dyn;
5372
5373 off = h->got.offset;
5374 BFD_ASSERT (off != (bfd_vma) -1);
5375 dyn = globals->root.dynamic_sections_created;
5376
5377 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5378 || (info->shared
5379 && SYMBOL_REFERENCES_LOCAL (info, h))
5380 || (ELF_ST_VISIBILITY (h->other)
5381 && h->root.type == bfd_link_hash_undefweak))
5382 {
5383 /* This is actually a static link, or it is a -Bsymbolic link
5384 and the symbol is defined locally. We must initialize this
5385 entry in the global offset table. Since the offset must
5386 always be a multiple of 4, we use the least significant bit
5387 to record whether we have initialized it already.
5388
5389 When doing a dynamic link, we create a .rel(a).got relocation
5390 entry to initialize the value. This is done in the
5391 finish_dynamic_symbol routine. */
5392 if ((off & 1) != 0)
5393 off &= ~1;
5394 else
5395 {
5396 /* If we are addressing a Thumb function, we need to
5397 adjust the address by one, so that attempts to
5398 call the function pointer will correctly
5399 interpret it as Thumb code. */
5400 if (sym_flags == STT_ARM_TFUNC)
5401 value |= 1;
5402
5403 bfd_put_32 (output_bfd, value, sgot->contents + off);
5404 h->got.offset |= 1;
5405 }
5406 }
5407 else
5408 *unresolved_reloc_p = FALSE;
5409
5410 value = sgot->output_offset + off;
5411 }
5412 else
5413 {
5414 bfd_vma off;
5415
5416 BFD_ASSERT (local_got_offsets != NULL &&
5417 local_got_offsets[r_symndx] != (bfd_vma) -1);
5418
5419 off = local_got_offsets[r_symndx];
5420
5421 /* The offset must always be a multiple of 4. We use the
5422 least significant bit to record whether we have already
5423 generated the necessary reloc. */
5424 if ((off & 1) != 0)
5425 off &= ~1;
5426 else
5427 {
5428 /* If we are addressing a Thumb function, we need to
5429 adjust the address by one, so that attempts to
5430 call the function pointer will correctly
5431 interpret it as Thumb code. */
5432 if (sym_flags == STT_ARM_TFUNC)
5433 value |= 1;
5434
5435 if (globals->use_rel)
5436 bfd_put_32 (output_bfd, value, sgot->contents + off);
5437
5438 if (info->shared)
5439 {
5440 asection * srelgot;
5441 Elf_Internal_Rela outrel;
5442 bfd_byte *loc;
5443
5444 srelgot = (bfd_get_section_by_name
5445 (dynobj, RELOC_SECTION (globals, ".got")));
5446 BFD_ASSERT (srelgot != NULL);
5447
5448 outrel.r_addend = addend + value;
5449 outrel.r_offset = (sgot->output_section->vma
5450 + sgot->output_offset
5451 + off);
5452 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5453 loc = srelgot->contents;
5454 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
5455 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5456 }
5457
5458 local_got_offsets[r_symndx] |= 1;
5459 }
5460
5461 value = sgot->output_offset + off;
5462 }
5463 if (r_type != R_ARM_GOT32)
5464 value += sgot->output_section->vma;
5465
5466 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5467 contents, rel->r_offset, value,
5468 rel->r_addend);
5469
5470 case R_ARM_TLS_LDO32:
5471 value = value - dtpoff_base (info);
5472
5473 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5474 contents, rel->r_offset, value,
5475 rel->r_addend);
5476
5477 case R_ARM_TLS_LDM32:
5478 {
5479 bfd_vma off;
5480
5481 if (globals->sgot == NULL)
5482 abort ();
5483
5484 off = globals->tls_ldm_got.offset;
5485
5486 if ((off & 1) != 0)
5487 off &= ~1;
5488 else
5489 {
5490 /* If we don't know the module number, create a relocation
5491 for it. */
5492 if (info->shared)
5493 {
5494 Elf_Internal_Rela outrel;
5495 bfd_byte *loc;
5496
5497 if (globals->srelgot == NULL)
5498 abort ();
5499
5500 outrel.r_addend = 0;
5501 outrel.r_offset = (globals->sgot->output_section->vma
5502 + globals->sgot->output_offset + off);
5503 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
5504
5505 if (globals->use_rel)
5506 bfd_put_32 (output_bfd, outrel.r_addend,
5507 globals->sgot->contents + off);
5508
5509 loc = globals->srelgot->contents;
5510 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
5511 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5512 }
5513 else
5514 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
5515
5516 globals->tls_ldm_got.offset |= 1;
5517 }
5518
5519 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5520 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5521
5522 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5523 contents, rel->r_offset, value,
5524 rel->r_addend);
5525 }
5526
5527 case R_ARM_TLS_GD32:
5528 case R_ARM_TLS_IE32:
5529 {
5530 bfd_vma off;
5531 int indx;
5532 char tls_type;
5533
5534 if (globals->sgot == NULL)
5535 abort ();
5536
5537 indx = 0;
5538 if (h != NULL)
5539 {
5540 bfd_boolean dyn;
5541 dyn = globals->root.dynamic_sections_created;
5542 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5543 && (!info->shared
5544 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5545 {
5546 *unresolved_reloc_p = FALSE;
5547 indx = h->dynindx;
5548 }
5549 off = h->got.offset;
5550 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
5551 }
5552 else
5553 {
5554 if (local_got_offsets == NULL)
5555 abort ();
5556 off = local_got_offsets[r_symndx];
5557 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
5558 }
5559
5560 if (tls_type == GOT_UNKNOWN)
5561 abort ();
5562
5563 if ((off & 1) != 0)
5564 off &= ~1;
5565 else
5566 {
5567 bfd_boolean need_relocs = FALSE;
5568 Elf_Internal_Rela outrel;
5569 bfd_byte *loc = NULL;
5570 int cur_off = off;
5571
5572 /* The GOT entries have not been initialized yet. Do it
5573 now, and emit any relocations. If both an IE GOT and a
5574 GD GOT are necessary, we emit the GD first. */
5575
5576 if ((info->shared || indx != 0)
5577 && (h == NULL
5578 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5579 || h->root.type != bfd_link_hash_undefweak))
5580 {
5581 need_relocs = TRUE;
5582 if (globals->srelgot == NULL)
5583 abort ();
5584 loc = globals->srelgot->contents;
5585 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
5586 }
5587
5588 if (tls_type & GOT_TLS_GD)
5589 {
5590 if (need_relocs)
5591 {
5592 outrel.r_addend = 0;
5593 outrel.r_offset = (globals->sgot->output_section->vma
5594 + globals->sgot->output_offset
5595 + cur_off);
5596 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
5597
5598 if (globals->use_rel)
5599 bfd_put_32 (output_bfd, outrel.r_addend,
5600 globals->sgot->contents + cur_off);
5601
5602 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5603 globals->srelgot->reloc_count++;
5604 loc += RELOC_SIZE (globals);
5605
5606 if (indx == 0)
5607 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5608 globals->sgot->contents + cur_off + 4);
5609 else
5610 {
5611 outrel.r_addend = 0;
5612 outrel.r_info = ELF32_R_INFO (indx,
5613 R_ARM_TLS_DTPOFF32);
5614 outrel.r_offset += 4;
5615
5616 if (globals->use_rel)
5617 bfd_put_32 (output_bfd, outrel.r_addend,
5618 globals->sgot->contents + cur_off + 4);
5619
5620
5621 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5622 globals->srelgot->reloc_count++;
5623 loc += RELOC_SIZE (globals);
5624 }
5625 }
5626 else
5627 {
5628 /* If we are not emitting relocations for a
5629 general dynamic reference, then we must be in a
5630 static link or an executable link with the
5631 symbol binding locally. Mark it as belonging
5632 to module 1, the executable. */
5633 bfd_put_32 (output_bfd, 1,
5634 globals->sgot->contents + cur_off);
5635 bfd_put_32 (output_bfd, value - dtpoff_base (info),
5636 globals->sgot->contents + cur_off + 4);
5637 }
5638
5639 cur_off += 8;
5640 }
5641
5642 if (tls_type & GOT_TLS_IE)
5643 {
5644 if (need_relocs)
5645 {
5646 if (indx == 0)
5647 outrel.r_addend = value - dtpoff_base (info);
5648 else
5649 outrel.r_addend = 0;
5650 outrel.r_offset = (globals->sgot->output_section->vma
5651 + globals->sgot->output_offset
5652 + cur_off);
5653 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
5654
5655 if (globals->use_rel)
5656 bfd_put_32 (output_bfd, outrel.r_addend,
5657 globals->sgot->contents + cur_off);
5658
5659 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
5660 globals->srelgot->reloc_count++;
5661 loc += RELOC_SIZE (globals);
5662 }
5663 else
5664 bfd_put_32 (output_bfd, tpoff (info, value),
5665 globals->sgot->contents + cur_off);
5666 cur_off += 4;
5667 }
5668
5669 if (h != NULL)
5670 h->got.offset |= 1;
5671 else
5672 local_got_offsets[r_symndx] |= 1;
5673 }
5674
5675 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
5676 off += 8;
5677 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
5678 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
5679
5680 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5681 contents, rel->r_offset, value,
5682 rel->r_addend);
5683 }
5684
5685 case R_ARM_TLS_LE32:
5686 if (info->shared)
5687 {
5688 (*_bfd_error_handler)
5689 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
5690 input_bfd, input_section,
5691 (long) rel->r_offset, howto->name);
5692 return FALSE;
5693 }
5694 else
5695 value = tpoff (info, value);
5696
5697 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5698 contents, rel->r_offset, value,
5699 rel->r_addend);
5700
5701 case R_ARM_V4BX:
5702 if (globals->fix_v4bx)
5703 {
5704 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5705
5706 /* Ensure that we have a BX instruction. */
5707 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
5708
5709 /* Preserve Rm (lowest four bits) and the condition code
5710 (highest four bits). Other bits encode MOV PC,Rm. */
5711 insn = (insn & 0xf000000f) | 0x01a0f000;
5712
5713 bfd_put_32 (input_bfd, insn, hit_data);
5714 }
5715 return bfd_reloc_ok;
5716
5717 case R_ARM_MOVW_ABS_NC:
5718 case R_ARM_MOVT_ABS:
5719 case R_ARM_MOVW_PREL_NC:
5720 case R_ARM_MOVT_PREL:
5721 /* Until we properly support segment-base-relative addressing then
5722 we assume the segment base to be zero, as for the group relocations.
5723 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
5724 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
5725 case R_ARM_MOVW_BREL_NC:
5726 case R_ARM_MOVW_BREL:
5727 case R_ARM_MOVT_BREL:
5728 {
5729 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5730
5731 if (globals->use_rel)
5732 {
5733 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
5734 signed_addend = (addend ^ 0x10000) - 0x10000;
5735 }
5736
5737 value += signed_addend;
5738
5739 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
5740 value -= (input_section->output_section->vma
5741 + input_section->output_offset + rel->r_offset);
5742
5743 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
5744 return bfd_reloc_overflow;
5745
5746 if (sym_flags == STT_ARM_TFUNC)
5747 value |= 1;
5748
5749 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
5750 || r_type == R_ARM_MOVT_BREL)
5751 value >>= 16;
5752
5753 insn &= 0xfff0f000;
5754 insn |= value & 0xfff;
5755 insn |= (value & 0xf000) << 4;
5756 bfd_put_32 (input_bfd, insn, hit_data);
5757 }
5758 return bfd_reloc_ok;
5759
5760 case R_ARM_THM_MOVW_ABS_NC:
5761 case R_ARM_THM_MOVT_ABS:
5762 case R_ARM_THM_MOVW_PREL_NC:
5763 case R_ARM_THM_MOVT_PREL:
5764 /* Until we properly support segment-base-relative addressing then
5765 we assume the segment base to be zero, as for the above relocations.
5766 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
5767 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
5768 as R_ARM_THM_MOVT_ABS. */
5769 case R_ARM_THM_MOVW_BREL_NC:
5770 case R_ARM_THM_MOVW_BREL:
5771 case R_ARM_THM_MOVT_BREL:
5772 {
5773 bfd_vma insn;
5774
5775 insn = bfd_get_16 (input_bfd, hit_data) << 16;
5776 insn |= bfd_get_16 (input_bfd, hit_data + 2);
5777
5778 if (globals->use_rel)
5779 {
5780 addend = ((insn >> 4) & 0xf000)
5781 | ((insn >> 15) & 0x0800)
5782 | ((insn >> 4) & 0x0700)
5783 | (insn & 0x00ff);
5784 signed_addend = (addend ^ 0x10000) - 0x10000;
5785 }
5786
5787 value += signed_addend;
5788
5789 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
5790 value -= (input_section->output_section->vma
5791 + input_section->output_offset + rel->r_offset);
5792
5793 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
5794 return bfd_reloc_overflow;
5795
5796 if (sym_flags == STT_ARM_TFUNC)
5797 value |= 1;
5798
5799 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
5800 || r_type == R_ARM_THM_MOVT_BREL)
5801 value >>= 16;
5802
5803 insn &= 0xfbf08f00;
5804 insn |= (value & 0xf000) << 4;
5805 insn |= (value & 0x0800) << 15;
5806 insn |= (value & 0x0700) << 4;
5807 insn |= (value & 0x00ff);
5808
5809 bfd_put_16 (input_bfd, insn >> 16, hit_data);
5810 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
5811 }
5812 return bfd_reloc_ok;
5813
5814 case R_ARM_ALU_PC_G0_NC:
5815 case R_ARM_ALU_PC_G1_NC:
5816 case R_ARM_ALU_PC_G0:
5817 case R_ARM_ALU_PC_G1:
5818 case R_ARM_ALU_PC_G2:
5819 case R_ARM_ALU_SB_G0_NC:
5820 case R_ARM_ALU_SB_G1_NC:
5821 case R_ARM_ALU_SB_G0:
5822 case R_ARM_ALU_SB_G1:
5823 case R_ARM_ALU_SB_G2:
5824 {
5825 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5826 bfd_vma pc = input_section->output_section->vma
5827 + input_section->output_offset + rel->r_offset;
5828 /* sb should be the origin of the *segment* containing the symbol.
5829 It is not clear how to obtain this OS-dependent value, so we
5830 make an arbitrary choice of zero. */
5831 bfd_vma sb = 0;
5832 bfd_vma residual;
5833 bfd_vma g_n;
5834 bfd_signed_vma signed_value;
5835 int group = 0;
5836
5837 /* Determine which group of bits to select. */
5838 switch (r_type)
5839 {
5840 case R_ARM_ALU_PC_G0_NC:
5841 case R_ARM_ALU_PC_G0:
5842 case R_ARM_ALU_SB_G0_NC:
5843 case R_ARM_ALU_SB_G0:
5844 group = 0;
5845 break;
5846
5847 case R_ARM_ALU_PC_G1_NC:
5848 case R_ARM_ALU_PC_G1:
5849 case R_ARM_ALU_SB_G1_NC:
5850 case R_ARM_ALU_SB_G1:
5851 group = 1;
5852 break;
5853
5854 case R_ARM_ALU_PC_G2:
5855 case R_ARM_ALU_SB_G2:
5856 group = 2;
5857 break;
5858
5859 default:
5860 abort();
5861 }
5862
5863 /* If REL, extract the addend from the insn. If RELA, it will
5864 have already been fetched for us. */
5865 if (globals->use_rel)
5866 {
5867 int negative;
5868 bfd_vma constant = insn & 0xff;
5869 bfd_vma rotation = (insn & 0xf00) >> 8;
5870
5871 if (rotation == 0)
5872 signed_addend = constant;
5873 else
5874 {
5875 /* Compensate for the fact that in the instruction, the
5876 rotation is stored in multiples of 2 bits. */
5877 rotation *= 2;
5878
5879 /* Rotate "constant" right by "rotation" bits. */
5880 signed_addend = (constant >> rotation) |
5881 (constant << (8 * sizeof (bfd_vma) - rotation));
5882 }
5883
5884 /* Determine if the instruction is an ADD or a SUB.
5885 (For REL, this determines the sign of the addend.) */
5886 negative = identify_add_or_sub (insn);
5887 if (negative == 0)
5888 {
5889 (*_bfd_error_handler)
5890 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
5891 input_bfd, input_section,
5892 (long) rel->r_offset, howto->name);
5893 return bfd_reloc_overflow;
5894 }
5895
5896 signed_addend *= negative;
5897 }
5898
5899 /* Compute the value (X) to go in the place. */
5900 if (r_type == R_ARM_ALU_PC_G0_NC
5901 || r_type == R_ARM_ALU_PC_G1_NC
5902 || r_type == R_ARM_ALU_PC_G0
5903 || r_type == R_ARM_ALU_PC_G1
5904 || r_type == R_ARM_ALU_PC_G2)
5905 /* PC relative. */
5906 signed_value = value - pc + signed_addend;
5907 else
5908 /* Section base relative. */
5909 signed_value = value - sb + signed_addend;
5910
5911 /* If the target symbol is a Thumb function, then set the
5912 Thumb bit in the address. */
5913 if (sym_flags == STT_ARM_TFUNC)
5914 signed_value |= 1;
5915
5916 /* Calculate the value of the relevant G_n, in encoded
5917 constant-with-rotation format. */
5918 g_n = calculate_group_reloc_mask (abs (signed_value), group,
5919 &residual);
5920
5921 /* Check for overflow if required. */
5922 if ((r_type == R_ARM_ALU_PC_G0
5923 || r_type == R_ARM_ALU_PC_G1
5924 || r_type == R_ARM_ALU_PC_G2
5925 || r_type == R_ARM_ALU_SB_G0
5926 || r_type == R_ARM_ALU_SB_G1
5927 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
5928 {
5929 (*_bfd_error_handler)
5930 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
5931 input_bfd, input_section,
5932 (long) rel->r_offset, abs (signed_value), howto->name);
5933 return bfd_reloc_overflow;
5934 }
5935
5936 /* Mask out the value and the ADD/SUB part of the opcode; take care
5937 not to destroy the S bit. */
5938 insn &= 0xff1ff000;
5939
5940 /* Set the opcode according to whether the value to go in the
5941 place is negative. */
5942 if (signed_value < 0)
5943 insn |= 1 << 22;
5944 else
5945 insn |= 1 << 23;
5946
5947 /* Encode the offset. */
5948 insn |= g_n;
5949
5950 bfd_put_32 (input_bfd, insn, hit_data);
5951 }
5952 return bfd_reloc_ok;
5953
5954 case R_ARM_LDR_PC_G0:
5955 case R_ARM_LDR_PC_G1:
5956 case R_ARM_LDR_PC_G2:
5957 case R_ARM_LDR_SB_G0:
5958 case R_ARM_LDR_SB_G1:
5959 case R_ARM_LDR_SB_G2:
5960 {
5961 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
5962 bfd_vma pc = input_section->output_section->vma
5963 + input_section->output_offset + rel->r_offset;
5964 bfd_vma sb = 0; /* See note above. */
5965 bfd_vma residual;
5966 bfd_signed_vma signed_value;
5967 int group = 0;
5968
5969 /* Determine which groups of bits to calculate. */
5970 switch (r_type)
5971 {
5972 case R_ARM_LDR_PC_G0:
5973 case R_ARM_LDR_SB_G0:
5974 group = 0;
5975 break;
5976
5977 case R_ARM_LDR_PC_G1:
5978 case R_ARM_LDR_SB_G1:
5979 group = 1;
5980 break;
5981
5982 case R_ARM_LDR_PC_G2:
5983 case R_ARM_LDR_SB_G2:
5984 group = 2;
5985 break;
5986
5987 default:
5988 abort();
5989 }
5990
5991 /* If REL, extract the addend from the insn. If RELA, it will
5992 have already been fetched for us. */
5993 if (globals->use_rel)
5994 {
5995 int negative = (insn & (1 << 23)) ? 1 : -1;
5996 signed_addend = negative * (insn & 0xfff);
5997 }
5998
5999 /* Compute the value (X) to go in the place. */
6000 if (r_type == R_ARM_LDR_PC_G0
6001 || r_type == R_ARM_LDR_PC_G1
6002 || r_type == R_ARM_LDR_PC_G2)
6003 /* PC relative. */
6004 signed_value = value - pc + signed_addend;
6005 else
6006 /* Section base relative. */
6007 signed_value = value - sb + signed_addend;
6008
6009 /* Calculate the value of the relevant G_{n-1} to obtain
6010 the residual at that stage. */
6011 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6012
6013 /* Check for overflow. */
6014 if (residual >= 0x1000)
6015 {
6016 (*_bfd_error_handler)
6017 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6018 input_bfd, input_section,
6019 (long) rel->r_offset, abs (signed_value), howto->name);
6020 return bfd_reloc_overflow;
6021 }
6022
6023 /* Mask out the value and U bit. */
6024 insn &= 0xff7ff000;
6025
6026 /* Set the U bit if the value to go in the place is non-negative. */
6027 if (signed_value >= 0)
6028 insn |= 1 << 23;
6029
6030 /* Encode the offset. */
6031 insn |= residual;
6032
6033 bfd_put_32 (input_bfd, insn, hit_data);
6034 }
6035 return bfd_reloc_ok;
6036
6037 case R_ARM_LDRS_PC_G0:
6038 case R_ARM_LDRS_PC_G1:
6039 case R_ARM_LDRS_PC_G2:
6040 case R_ARM_LDRS_SB_G0:
6041 case R_ARM_LDRS_SB_G1:
6042 case R_ARM_LDRS_SB_G2:
6043 {
6044 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6045 bfd_vma pc = input_section->output_section->vma
6046 + input_section->output_offset + rel->r_offset;
6047 bfd_vma sb = 0; /* See note above. */
6048 bfd_vma residual;
6049 bfd_signed_vma signed_value;
6050 int group = 0;
6051
6052 /* Determine which groups of bits to calculate. */
6053 switch (r_type)
6054 {
6055 case R_ARM_LDRS_PC_G0:
6056 case R_ARM_LDRS_SB_G0:
6057 group = 0;
6058 break;
6059
6060 case R_ARM_LDRS_PC_G1:
6061 case R_ARM_LDRS_SB_G1:
6062 group = 1;
6063 break;
6064
6065 case R_ARM_LDRS_PC_G2:
6066 case R_ARM_LDRS_SB_G2:
6067 group = 2;
6068 break;
6069
6070 default:
6071 abort();
6072 }
6073
6074 /* If REL, extract the addend from the insn. If RELA, it will
6075 have already been fetched for us. */
6076 if (globals->use_rel)
6077 {
6078 int negative = (insn & (1 << 23)) ? 1 : -1;
6079 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
6080 }
6081
6082 /* Compute the value (X) to go in the place. */
6083 if (r_type == R_ARM_LDRS_PC_G0
6084 || r_type == R_ARM_LDRS_PC_G1
6085 || r_type == R_ARM_LDRS_PC_G2)
6086 /* PC relative. */
6087 signed_value = value - pc + signed_addend;
6088 else
6089 /* Section base relative. */
6090 signed_value = value - sb + signed_addend;
6091
6092 /* Calculate the value of the relevant G_{n-1} to obtain
6093 the residual at that stage. */
6094 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6095
6096 /* Check for overflow. */
6097 if (residual >= 0x100)
6098 {
6099 (*_bfd_error_handler)
6100 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6101 input_bfd, input_section,
6102 (long) rel->r_offset, abs (signed_value), howto->name);
6103 return bfd_reloc_overflow;
6104 }
6105
6106 /* Mask out the value and U bit. */
6107 insn &= 0xff7ff0f0;
6108
6109 /* Set the U bit if the value to go in the place is non-negative. */
6110 if (signed_value >= 0)
6111 insn |= 1 << 23;
6112
6113 /* Encode the offset. */
6114 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
6115
6116 bfd_put_32 (input_bfd, insn, hit_data);
6117 }
6118 return bfd_reloc_ok;
6119
6120 case R_ARM_LDC_PC_G0:
6121 case R_ARM_LDC_PC_G1:
6122 case R_ARM_LDC_PC_G2:
6123 case R_ARM_LDC_SB_G0:
6124 case R_ARM_LDC_SB_G1:
6125 case R_ARM_LDC_SB_G2:
6126 {
6127 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
6128 bfd_vma pc = input_section->output_section->vma
6129 + input_section->output_offset + rel->r_offset;
6130 bfd_vma sb = 0; /* See note above. */
6131 bfd_vma residual;
6132 bfd_signed_vma signed_value;
6133 int group = 0;
6134
6135 /* Determine which groups of bits to calculate. */
6136 switch (r_type)
6137 {
6138 case R_ARM_LDC_PC_G0:
6139 case R_ARM_LDC_SB_G0:
6140 group = 0;
6141 break;
6142
6143 case R_ARM_LDC_PC_G1:
6144 case R_ARM_LDC_SB_G1:
6145 group = 1;
6146 break;
6147
6148 case R_ARM_LDC_PC_G2:
6149 case R_ARM_LDC_SB_G2:
6150 group = 2;
6151 break;
6152
6153 default:
6154 abort();
6155 }
6156
6157 /* If REL, extract the addend from the insn. If RELA, it will
6158 have already been fetched for us. */
6159 if (globals->use_rel)
6160 {
6161 int negative = (insn & (1 << 23)) ? 1 : -1;
6162 signed_addend = negative * ((insn & 0xff) << 2);
6163 }
6164
6165 /* Compute the value (X) to go in the place. */
6166 if (r_type == R_ARM_LDC_PC_G0
6167 || r_type == R_ARM_LDC_PC_G1
6168 || r_type == R_ARM_LDC_PC_G2)
6169 /* PC relative. */
6170 signed_value = value - pc + signed_addend;
6171 else
6172 /* Section base relative. */
6173 signed_value = value - sb + signed_addend;
6174
6175 /* Calculate the value of the relevant G_{n-1} to obtain
6176 the residual at that stage. */
6177 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
6178
6179 /* Check for overflow. (The absolute value to go in the place must be
6180 divisible by four and, after having been divided by four, must
6181 fit in eight bits.) */
6182 if ((residual & 0x3) != 0 || residual >= 0x400)
6183 {
6184 (*_bfd_error_handler)
6185 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
6186 input_bfd, input_section,
6187 (long) rel->r_offset, abs (signed_value), howto->name);
6188 return bfd_reloc_overflow;
6189 }
6190
6191 /* Mask out the value and U bit. */
6192 insn &= 0xff7fff00;
6193
6194 /* Set the U bit if the value to go in the place is non-negative. */
6195 if (signed_value >= 0)
6196 insn |= 1 << 23;
6197
6198 /* Encode the offset. */
6199 insn |= residual >> 2;
6200
6201 bfd_put_32 (input_bfd, insn, hit_data);
6202 }
6203 return bfd_reloc_ok;
6204
6205 default:
6206 return bfd_reloc_notsupported;
6207 }
6208 }
6209
6210 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
6211 static void
6212 arm_add_to_rel (bfd * abfd,
6213 bfd_byte * address,
6214 reloc_howto_type * howto,
6215 bfd_signed_vma increment)
6216 {
6217 bfd_signed_vma addend;
6218
6219 if (howto->type == R_ARM_THM_CALL
6220 || howto->type == R_ARM_THM_JUMP24)
6221 {
6222 int upper_insn, lower_insn;
6223 int upper, lower;
6224
6225 upper_insn = bfd_get_16 (abfd, address);
6226 lower_insn = bfd_get_16 (abfd, address + 2);
6227 upper = upper_insn & 0x7ff;
6228 lower = lower_insn & 0x7ff;
6229
6230 addend = (upper << 12) | (lower << 1);
6231 addend += increment;
6232 addend >>= 1;
6233
6234 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
6235 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
6236
6237 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
6238 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
6239 }
6240 else
6241 {
6242 bfd_vma contents;
6243
6244 contents = bfd_get_32 (abfd, address);
6245
6246 /* Get the (signed) value from the instruction. */
6247 addend = contents & howto->src_mask;
6248 if (addend & ((howto->src_mask + 1) >> 1))
6249 {
6250 bfd_signed_vma mask;
6251
6252 mask = -1;
6253 mask &= ~ howto->src_mask;
6254 addend |= mask;
6255 }
6256
6257 /* Add in the increment, (which is a byte value). */
6258 switch (howto->type)
6259 {
6260 default:
6261 addend += increment;
6262 break;
6263
6264 case R_ARM_PC24:
6265 case R_ARM_PLT32:
6266 case R_ARM_CALL:
6267 case R_ARM_JUMP24:
6268 addend <<= howto->size;
6269 addend += increment;
6270
6271 /* Should we check for overflow here ? */
6272
6273 /* Drop any undesired bits. */
6274 addend >>= howto->rightshift;
6275 break;
6276 }
6277
6278 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
6279
6280 bfd_put_32 (abfd, contents, address);
6281 }
6282 }
6283
6284 #define IS_ARM_TLS_RELOC(R_TYPE) \
6285 ((R_TYPE) == R_ARM_TLS_GD32 \
6286 || (R_TYPE) == R_ARM_TLS_LDO32 \
6287 || (R_TYPE) == R_ARM_TLS_LDM32 \
6288 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
6289 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
6290 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
6291 || (R_TYPE) == R_ARM_TLS_LE32 \
6292 || (R_TYPE) == R_ARM_TLS_IE32)
6293
6294 /* Relocate an ARM ELF section. */
6295 static bfd_boolean
6296 elf32_arm_relocate_section (bfd * output_bfd,
6297 struct bfd_link_info * info,
6298 bfd * input_bfd,
6299 asection * input_section,
6300 bfd_byte * contents,
6301 Elf_Internal_Rela * relocs,
6302 Elf_Internal_Sym * local_syms,
6303 asection ** local_sections)
6304 {
6305 Elf_Internal_Shdr *symtab_hdr;
6306 struct elf_link_hash_entry **sym_hashes;
6307 Elf_Internal_Rela *rel;
6308 Elf_Internal_Rela *relend;
6309 const char *name;
6310 struct elf32_arm_link_hash_table * globals;
6311
6312 globals = elf32_arm_hash_table (info);
6313
6314 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
6315 sym_hashes = elf_sym_hashes (input_bfd);
6316
6317 rel = relocs;
6318 relend = relocs + input_section->reloc_count;
6319 for (; rel < relend; rel++)
6320 {
6321 int r_type;
6322 reloc_howto_type * howto;
6323 unsigned long r_symndx;
6324 Elf_Internal_Sym * sym;
6325 asection * sec;
6326 struct elf_link_hash_entry * h;
6327 bfd_vma relocation;
6328 bfd_reloc_status_type r;
6329 arelent bfd_reloc;
6330 char sym_type;
6331 bfd_boolean unresolved_reloc = FALSE;
6332 char *error_message = NULL;
6333
6334 r_symndx = ELF32_R_SYM (rel->r_info);
6335 r_type = ELF32_R_TYPE (rel->r_info);
6336 r_type = arm_real_reloc_type (globals, r_type);
6337
6338 if ( r_type == R_ARM_GNU_VTENTRY
6339 || r_type == R_ARM_GNU_VTINHERIT)
6340 continue;
6341
6342 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
6343 howto = bfd_reloc.howto;
6344
6345 h = NULL;
6346 sym = NULL;
6347 sec = NULL;
6348
6349 if (r_symndx < symtab_hdr->sh_info)
6350 {
6351 sym = local_syms + r_symndx;
6352 sym_type = ELF32_ST_TYPE (sym->st_info);
6353 sec = local_sections[r_symndx];
6354 if (globals->use_rel)
6355 {
6356 relocation = (sec->output_section->vma
6357 + sec->output_offset
6358 + sym->st_value);
6359 if (!info->relocatable
6360 && (sec->flags & SEC_MERGE)
6361 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6362 {
6363 asection *msec;
6364 bfd_vma addend, value;
6365
6366 if (howto->rightshift)
6367 {
6368 (*_bfd_error_handler)
6369 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
6370 input_bfd, input_section,
6371 (long) rel->r_offset, howto->name);
6372 return FALSE;
6373 }
6374
6375 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
6376
6377 /* Get the (signed) value from the instruction. */
6378 addend = value & howto->src_mask;
6379 if (addend & ((howto->src_mask + 1) >> 1))
6380 {
6381 bfd_signed_vma mask;
6382
6383 mask = -1;
6384 mask &= ~ howto->src_mask;
6385 addend |= mask;
6386 }
6387 msec = sec;
6388 addend =
6389 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
6390 - relocation;
6391 addend += msec->output_section->vma + msec->output_offset;
6392 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
6393 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
6394 }
6395 }
6396 else
6397 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6398 }
6399 else
6400 {
6401 bfd_boolean warned;
6402
6403 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6404 r_symndx, symtab_hdr, sym_hashes,
6405 h, sec, relocation,
6406 unresolved_reloc, warned);
6407
6408 sym_type = h->type;
6409 }
6410
6411 if (sec != NULL && elf_discarded_section (sec))
6412 {
6413 /* For relocs against symbols from removed linkonce sections,
6414 or sections discarded by a linker script, we just want the
6415 section contents zeroed. Avoid any special processing. */
6416 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6417 rel->r_info = 0;
6418 rel->r_addend = 0;
6419 continue;
6420 }
6421
6422 if (info->relocatable)
6423 {
6424 /* This is a relocatable link. We don't have to change
6425 anything, unless the reloc is against a section symbol,
6426 in which case we have to adjust according to where the
6427 section symbol winds up in the output section. */
6428 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6429 {
6430 if (globals->use_rel)
6431 arm_add_to_rel (input_bfd, contents + rel->r_offset,
6432 howto, (bfd_signed_vma) sec->output_offset);
6433 else
6434 rel->r_addend += sec->output_offset;
6435 }
6436 continue;
6437 }
6438
6439 if (h != NULL)
6440 name = h->root.root.string;
6441 else
6442 {
6443 name = (bfd_elf_string_from_elf_section
6444 (input_bfd, symtab_hdr->sh_link, sym->st_name));
6445 if (name == NULL || *name == '\0')
6446 name = bfd_section_name (input_bfd, sec);
6447 }
6448
6449 if (r_symndx != 0
6450 && r_type != R_ARM_NONE
6451 && (h == NULL
6452 || h->root.type == bfd_link_hash_defined
6453 || h->root.type == bfd_link_hash_defweak)
6454 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
6455 {
6456 (*_bfd_error_handler)
6457 ((sym_type == STT_TLS
6458 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
6459 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
6460 input_bfd,
6461 input_section,
6462 (long) rel->r_offset,
6463 howto->name,
6464 name);
6465 }
6466
6467 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
6468 input_section, contents, rel,
6469 relocation, info, sec, name,
6470 (h ? ELF_ST_TYPE (h->type) :
6471 ELF_ST_TYPE (sym->st_info)), h,
6472 &unresolved_reloc, &error_message);
6473
6474 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6475 because such sections are not SEC_ALLOC and thus ld.so will
6476 not process them. */
6477 if (unresolved_reloc
6478 && !((input_section->flags & SEC_DEBUGGING) != 0
6479 && h->def_dynamic))
6480 {
6481 (*_bfd_error_handler)
6482 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6483 input_bfd,
6484 input_section,
6485 (long) rel->r_offset,
6486 howto->name,
6487 h->root.root.string);
6488 return FALSE;
6489 }
6490
6491 if (r != bfd_reloc_ok)
6492 {
6493 switch (r)
6494 {
6495 case bfd_reloc_overflow:
6496 /* If the overflowing reloc was to an undefined symbol,
6497 we have already printed one error message and there
6498 is no point complaining again. */
6499 if ((! h ||
6500 h->root.type != bfd_link_hash_undefined)
6501 && (!((*info->callbacks->reloc_overflow)
6502 (info, (h ? &h->root : NULL), name, howto->name,
6503 (bfd_vma) 0, input_bfd, input_section,
6504 rel->r_offset))))
6505 return FALSE;
6506 break;
6507
6508 case bfd_reloc_undefined:
6509 if (!((*info->callbacks->undefined_symbol)
6510 (info, name, input_bfd, input_section,
6511 rel->r_offset, TRUE)))
6512 return FALSE;
6513 break;
6514
6515 case bfd_reloc_outofrange:
6516 error_message = _("out of range");
6517 goto common_error;
6518
6519 case bfd_reloc_notsupported:
6520 error_message = _("unsupported relocation");
6521 goto common_error;
6522
6523 case bfd_reloc_dangerous:
6524 /* error_message should already be set. */
6525 goto common_error;
6526
6527 default:
6528 error_message = _("unknown error");
6529 /* fall through */
6530
6531 common_error:
6532 BFD_ASSERT (error_message != NULL);
6533 if (!((*info->callbacks->reloc_dangerous)
6534 (info, error_message, input_bfd, input_section,
6535 rel->r_offset)))
6536 return FALSE;
6537 break;
6538 }
6539 }
6540 }
6541
6542 return TRUE;
6543 }
6544
6545 /* Set the right machine number. */
6546
6547 static bfd_boolean
6548 elf32_arm_object_p (bfd *abfd)
6549 {
6550 unsigned int mach;
6551
6552 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
6553
6554 if (mach != bfd_mach_arm_unknown)
6555 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6556
6557 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
6558 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
6559
6560 else
6561 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
6562
6563 return TRUE;
6564 }
6565
6566 /* Function to keep ARM specific flags in the ELF header. */
6567
6568 static bfd_boolean
6569 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
6570 {
6571 if (elf_flags_init (abfd)
6572 && elf_elfheader (abfd)->e_flags != flags)
6573 {
6574 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
6575 {
6576 if (flags & EF_ARM_INTERWORK)
6577 (*_bfd_error_handler)
6578 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
6579 abfd);
6580 else
6581 _bfd_error_handler
6582 (_("Warning: Clearing the interworking flag of %B due to outside request"),
6583 abfd);
6584 }
6585 }
6586 else
6587 {
6588 elf_elfheader (abfd)->e_flags = flags;
6589 elf_flags_init (abfd) = TRUE;
6590 }
6591
6592 return TRUE;
6593 }
6594
6595 /* Copy backend specific data from one object module to another. */
6596
6597 static bfd_boolean
6598 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6599 {
6600 flagword in_flags;
6601 flagword out_flags;
6602
6603 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6604 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6605 return TRUE;
6606
6607 in_flags = elf_elfheader (ibfd)->e_flags;
6608 out_flags = elf_elfheader (obfd)->e_flags;
6609
6610 if (elf_flags_init (obfd)
6611 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
6612 && in_flags != out_flags)
6613 {
6614 /* Cannot mix APCS26 and APCS32 code. */
6615 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
6616 return FALSE;
6617
6618 /* Cannot mix float APCS and non-float APCS code. */
6619 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
6620 return FALSE;
6621
6622 /* If the src and dest have different interworking flags
6623 then turn off the interworking bit. */
6624 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
6625 {
6626 if (out_flags & EF_ARM_INTERWORK)
6627 _bfd_error_handler
6628 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
6629 obfd, ibfd);
6630
6631 in_flags &= ~EF_ARM_INTERWORK;
6632 }
6633
6634 /* Likewise for PIC, though don't warn for this case. */
6635 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
6636 in_flags &= ~EF_ARM_PIC;
6637 }
6638
6639 elf_elfheader (obfd)->e_flags = in_flags;
6640 elf_flags_init (obfd) = TRUE;
6641
6642 /* Also copy the EI_OSABI field. */
6643 elf_elfheader (obfd)->e_ident[EI_OSABI] =
6644 elf_elfheader (ibfd)->e_ident[EI_OSABI];
6645
6646 /* Copy object attributes. */
6647 _bfd_elf_copy_obj_attributes (ibfd, obfd);
6648
6649 return TRUE;
6650 }
6651
6652 /* Values for Tag_ABI_PCS_R9_use. */
6653 enum
6654 {
6655 AEABI_R9_V6,
6656 AEABI_R9_SB,
6657 AEABI_R9_TLS,
6658 AEABI_R9_unused
6659 };
6660
6661 /* Values for Tag_ABI_PCS_RW_data. */
6662 enum
6663 {
6664 AEABI_PCS_RW_data_absolute,
6665 AEABI_PCS_RW_data_PCrel,
6666 AEABI_PCS_RW_data_SBrel,
6667 AEABI_PCS_RW_data_unused
6668 };
6669
6670 /* Values for Tag_ABI_enum_size. */
6671 enum
6672 {
6673 AEABI_enum_unused,
6674 AEABI_enum_short,
6675 AEABI_enum_wide,
6676 AEABI_enum_forced_wide
6677 };
6678
6679 /* Determine whether an object attribute tag takes an integer, a
6680 string or both. */
6681 static int
6682 elf32_arm_obj_attrs_arg_type (int tag)
6683 {
6684 if (tag == Tag_compatibility)
6685 return 3;
6686 else if (tag == 4 || tag == 5)
6687 return 2;
6688 else if (tag < 32)
6689 return 1;
6690 else
6691 return (tag & 1) != 0 ? 2 : 1;
6692 }
6693
6694 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
6695 are conflicting attributes. */
6696 static bfd_boolean
6697 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
6698 {
6699 obj_attribute *in_attr;
6700 obj_attribute *out_attr;
6701 obj_attribute_list *in_list;
6702 /* Some tags have 0 = don't care, 1 = strong requirement,
6703 2 = weak requirement. */
6704 static const int order_312[3] = {3, 1, 2};
6705 int i;
6706
6707 if (!elf_known_obj_attributes_proc (obfd)[0].i)
6708 {
6709 /* This is the first object. Copy the attributes. */
6710 _bfd_elf_copy_obj_attributes (ibfd, obfd);
6711
6712 /* Use the Tag_null value to indicate the attributes have been
6713 initialized. */
6714 elf_known_obj_attributes_proc (obfd)[0].i = 1;
6715
6716 return TRUE;
6717 }
6718
6719 in_attr = elf_known_obj_attributes_proc (ibfd);
6720 out_attr = elf_known_obj_attributes_proc (obfd);
6721 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
6722 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
6723 {
6724 /* Ignore mismatches if teh object doesn't use floating point. */
6725 if (out_attr[Tag_ABI_FP_number_model].i == 0)
6726 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
6727 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
6728 {
6729 _bfd_error_handler
6730 (_("ERROR: %B uses VFP register arguments, %B does not"),
6731 ibfd, obfd);
6732 return FALSE;
6733 }
6734 }
6735
6736 for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
6737 {
6738 /* Merge this attribute with existing attributes. */
6739 switch (i)
6740 {
6741 case Tag_CPU_raw_name:
6742 case Tag_CPU_name:
6743 /* Use whichever has the greatest architecture requirements. We
6744 won't necessarily have both the above tags, so make sure input
6745 name is non-NULL. */
6746 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i
6747 && in_attr[i].s)
6748 out_attr[i].s = _bfd_elf_attr_strdup (obfd, in_attr[i].s);
6749 break;
6750
6751 case Tag_ABI_optimization_goals:
6752 case Tag_ABI_FP_optimization_goals:
6753 /* Use the first value seen. */
6754 break;
6755
6756 case Tag_CPU_arch:
6757 case Tag_ARM_ISA_use:
6758 case Tag_THUMB_ISA_use:
6759 case Tag_VFP_arch:
6760 case Tag_WMMX_arch:
6761 case Tag_NEON_arch:
6762 /* ??? Do NEON and WMMX conflict? */
6763 case Tag_ABI_FP_rounding:
6764 case Tag_ABI_FP_denormal:
6765 case Tag_ABI_FP_exceptions:
6766 case Tag_ABI_FP_user_exceptions:
6767 case Tag_ABI_FP_number_model:
6768 case Tag_ABI_align8_preserved:
6769 case Tag_ABI_HardFP_use:
6770 /* Use the largest value specified. */
6771 if (in_attr[i].i > out_attr[i].i)
6772 out_attr[i].i = in_attr[i].i;
6773 break;
6774
6775 case Tag_CPU_arch_profile:
6776 /* Warn if conflicting architecture profiles used. */
6777 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
6778 {
6779 _bfd_error_handler
6780 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
6781 ibfd, in_attr[i].i, out_attr[i].i);
6782 return FALSE;
6783 }
6784 if (in_attr[i].i)
6785 out_attr[i].i = in_attr[i].i;
6786 break;
6787 case Tag_PCS_config:
6788 if (out_attr[i].i == 0)
6789 out_attr[i].i = in_attr[i].i;
6790 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
6791 {
6792 /* It's sometimes ok to mix different configs, so this is only
6793 a warning. */
6794 _bfd_error_handler
6795 (_("Warning: %B: Conflicting platform configuration"), ibfd);
6796 }
6797 break;
6798 case Tag_ABI_PCS_R9_use:
6799 if (in_attr[i].i != out_attr[i].i
6800 && out_attr[i].i != AEABI_R9_unused
6801 && in_attr[i].i != AEABI_R9_unused)
6802 {
6803 _bfd_error_handler
6804 (_("ERROR: %B: Conflicting use of R9"), ibfd);
6805 return FALSE;
6806 }
6807 if (out_attr[i].i == AEABI_R9_unused)
6808 out_attr[i].i = in_attr[i].i;
6809 break;
6810 case Tag_ABI_PCS_RW_data:
6811 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
6812 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
6813 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
6814 {
6815 _bfd_error_handler
6816 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
6817 ibfd);
6818 return FALSE;
6819 }
6820 /* Use the smallest value specified. */
6821 if (in_attr[i].i < out_attr[i].i)
6822 out_attr[i].i = in_attr[i].i;
6823 break;
6824 case Tag_ABI_PCS_RO_data:
6825 /* Use the smallest value specified. */
6826 if (in_attr[i].i < out_attr[i].i)
6827 out_attr[i].i = in_attr[i].i;
6828 break;
6829 case Tag_ABI_PCS_GOT_use:
6830 if (in_attr[i].i > 2 || out_attr[i].i > 2
6831 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
6832 out_attr[i].i = in_attr[i].i;
6833 break;
6834 case Tag_ABI_PCS_wchar_t:
6835 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
6836 {
6837 _bfd_error_handler
6838 (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
6839 return FALSE;
6840 }
6841 if (in_attr[i].i)
6842 out_attr[i].i = in_attr[i].i;
6843 break;
6844 case Tag_ABI_align8_needed:
6845 /* ??? Check against Tag_ABI_align8_preserved. */
6846 if (in_attr[i].i > 2 || out_attr[i].i > 2
6847 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
6848 out_attr[i].i = in_attr[i].i;
6849 break;
6850 case Tag_ABI_enum_size:
6851 if (in_attr[i].i != AEABI_enum_unused)
6852 {
6853 if (out_attr[i].i == AEABI_enum_unused
6854 || out_attr[i].i == AEABI_enum_forced_wide)
6855 {
6856 /* The existing object is compatible with anything.
6857 Use whatever requirements the new object has. */
6858 out_attr[i].i = in_attr[i].i;
6859 }
6860 else if (in_attr[i].i != AEABI_enum_forced_wide
6861 && out_attr[i].i != in_attr[i].i
6862 && !elf32_arm_tdata (obfd)->no_enum_size_warning)
6863 {
6864 const char *aeabi_enum_names[] =
6865 { "", "variable-size", "32-bit", "" };
6866 _bfd_error_handler
6867 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
6868 ibfd, aeabi_enum_names[in_attr[i].i],
6869 aeabi_enum_names[out_attr[i].i]);
6870 }
6871 }
6872 break;
6873 case Tag_ABI_VFP_args:
6874 /* Aready done. */
6875 break;
6876 case Tag_ABI_WMMX_args:
6877 if (in_attr[i].i != out_attr[i].i)
6878 {
6879 _bfd_error_handler
6880 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
6881 ibfd, obfd);
6882 return FALSE;
6883 }
6884 break;
6885 default: /* All known attributes should be explicitly covered. */
6886 abort ();
6887 }
6888
6889 if (in_attr[i].type && !out_attr[i].type)
6890 switch (in_attr[i].type)
6891 {
6892 case 1:
6893 if (out_attr[i].i)
6894 out_attr[i].type = 1;
6895 break;
6896
6897 case 2:
6898 if (out_attr[i].s)
6899 out_attr[i].type = 2;
6900 break;
6901
6902 default:
6903 abort ();
6904 }
6905 }
6906
6907 /* Merge Tag_compatibility attributes and any common GNU ones. */
6908 _bfd_elf_merge_object_attributes (ibfd, obfd);
6909
6910 /* Check for any attributes not known on ARM. */
6911 in_list = elf_other_obj_attributes_proc (ibfd);
6912 while (in_list && in_list->tag == Tag_compatibility)
6913 in_list = in_list->next;
6914
6915 for (; in_list; in_list = in_list->next)
6916 {
6917 if ((in_list->tag & 128) < 64)
6918 {
6919 _bfd_error_handler
6920 (_("Warning: %B: Unknown EABI object attribute %d"),
6921 ibfd, in_list->tag);
6922 break;
6923 }
6924 }
6925 return TRUE;
6926 }
6927
6928
6929 /* Return TRUE if the two EABI versions are incompatible. */
6930
6931 static bfd_boolean
6932 elf32_arm_versions_compatible (unsigned iver, unsigned over)
6933 {
6934 /* v4 and v5 are the same spec before and after it was released,
6935 so allow mixing them. */
6936 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
6937 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
6938 return TRUE;
6939
6940 return (iver == over);
6941 }
6942
6943 /* Merge backend specific data from an object file to the output
6944 object file when linking. */
6945
6946 static bfd_boolean
6947 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
6948 {
6949 flagword out_flags;
6950 flagword in_flags;
6951 bfd_boolean flags_compatible = TRUE;
6952 asection *sec;
6953
6954 /* Check if we have the same endianess. */
6955 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
6956 return FALSE;
6957
6958 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6959 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6960 return TRUE;
6961
6962 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
6963 return FALSE;
6964
6965 /* The input BFD must have had its flags initialised. */
6966 /* The following seems bogus to me -- The flags are initialized in
6967 the assembler but I don't think an elf_flags_init field is
6968 written into the object. */
6969 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6970
6971 in_flags = elf_elfheader (ibfd)->e_flags;
6972 out_flags = elf_elfheader (obfd)->e_flags;
6973
6974 if (!elf_flags_init (obfd))
6975 {
6976 /* If the input is the default architecture and had the default
6977 flags then do not bother setting the flags for the output
6978 architecture, instead allow future merges to do this. If no
6979 future merges ever set these flags then they will retain their
6980 uninitialised values, which surprise surprise, correspond
6981 to the default values. */
6982 if (bfd_get_arch_info (ibfd)->the_default
6983 && elf_elfheader (ibfd)->e_flags == 0)
6984 return TRUE;
6985
6986 elf_flags_init (obfd) = TRUE;
6987 elf_elfheader (obfd)->e_flags = in_flags;
6988
6989 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
6990 && bfd_get_arch_info (obfd)->the_default)
6991 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
6992
6993 return TRUE;
6994 }
6995
6996 /* Determine what should happen if the input ARM architecture
6997 does not match the output ARM architecture. */
6998 if (! bfd_arm_merge_machines (ibfd, obfd))
6999 return FALSE;
7000
7001 /* Identical flags must be compatible. */
7002 if (in_flags == out_flags)
7003 return TRUE;
7004
7005 /* Check to see if the input BFD actually contains any sections. If
7006 not, its flags may not have been initialised either, but it
7007 cannot actually cause any incompatiblity. Do not short-circuit
7008 dynamic objects; their section list may be emptied by
7009 elf_link_add_object_symbols.
7010
7011 Also check to see if there are no code sections in the input.
7012 In this case there is no need to check for code specific flags.
7013 XXX - do we need to worry about floating-point format compatability
7014 in data sections ? */
7015 if (!(ibfd->flags & DYNAMIC))
7016 {
7017 bfd_boolean null_input_bfd = TRUE;
7018 bfd_boolean only_data_sections = TRUE;
7019
7020 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7021 {
7022 /* Ignore synthetic glue sections. */
7023 if (strcmp (sec->name, ".glue_7")
7024 && strcmp (sec->name, ".glue_7t"))
7025 {
7026 if ((bfd_get_section_flags (ibfd, sec)
7027 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7028 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7029 only_data_sections = FALSE;
7030
7031 null_input_bfd = FALSE;
7032 break;
7033 }
7034 }
7035
7036 if (null_input_bfd || only_data_sections)
7037 return TRUE;
7038 }
7039
7040 /* Complain about various flag mismatches. */
7041 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
7042 EF_ARM_EABI_VERSION (out_flags)))
7043 {
7044 _bfd_error_handler
7045 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
7046 ibfd, obfd,
7047 (in_flags & EF_ARM_EABIMASK) >> 24,
7048 (out_flags & EF_ARM_EABIMASK) >> 24);
7049 return FALSE;
7050 }
7051
7052 /* Not sure what needs to be checked for EABI versions >= 1. */
7053 /* VxWorks libraries do not use these flags. */
7054 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
7055 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
7056 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
7057 {
7058 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
7059 {
7060 _bfd_error_handler
7061 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
7062 ibfd, obfd,
7063 in_flags & EF_ARM_APCS_26 ? 26 : 32,
7064 out_flags & EF_ARM_APCS_26 ? 26 : 32);
7065 flags_compatible = FALSE;
7066 }
7067
7068 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
7069 {
7070 if (in_flags & EF_ARM_APCS_FLOAT)
7071 _bfd_error_handler
7072 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
7073 ibfd, obfd);
7074 else
7075 _bfd_error_handler
7076 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
7077 ibfd, obfd);
7078
7079 flags_compatible = FALSE;
7080 }
7081
7082 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
7083 {
7084 if (in_flags & EF_ARM_VFP_FLOAT)
7085 _bfd_error_handler
7086 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
7087 ibfd, obfd);
7088 else
7089 _bfd_error_handler
7090 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
7091 ibfd, obfd);
7092
7093 flags_compatible = FALSE;
7094 }
7095
7096 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
7097 {
7098 if (in_flags & EF_ARM_MAVERICK_FLOAT)
7099 _bfd_error_handler
7100 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
7101 ibfd, obfd);
7102 else
7103 _bfd_error_handler
7104 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
7105 ibfd, obfd);
7106
7107 flags_compatible = FALSE;
7108 }
7109
7110 #ifdef EF_ARM_SOFT_FLOAT
7111 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
7112 {
7113 /* We can allow interworking between code that is VFP format
7114 layout, and uses either soft float or integer regs for
7115 passing floating point arguments and results. We already
7116 know that the APCS_FLOAT flags match; similarly for VFP
7117 flags. */
7118 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
7119 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
7120 {
7121 if (in_flags & EF_ARM_SOFT_FLOAT)
7122 _bfd_error_handler
7123 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
7124 ibfd, obfd);
7125 else
7126 _bfd_error_handler
7127 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
7128 ibfd, obfd);
7129
7130 flags_compatible = FALSE;
7131 }
7132 }
7133 #endif
7134
7135 /* Interworking mismatch is only a warning. */
7136 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
7137 {
7138 if (in_flags & EF_ARM_INTERWORK)
7139 {
7140 _bfd_error_handler
7141 (_("Warning: %B supports interworking, whereas %B does not"),
7142 ibfd, obfd);
7143 }
7144 else
7145 {
7146 _bfd_error_handler
7147 (_("Warning: %B does not support interworking, whereas %B does"),
7148 ibfd, obfd);
7149 }
7150 }
7151 }
7152
7153 return flags_compatible;
7154 }
7155
7156 /* Display the flags field. */
7157
7158 static bfd_boolean
7159 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
7160 {
7161 FILE * file = (FILE *) ptr;
7162 unsigned long flags;
7163
7164 BFD_ASSERT (abfd != NULL && ptr != NULL);
7165
7166 /* Print normal ELF private data. */
7167 _bfd_elf_print_private_bfd_data (abfd, ptr);
7168
7169 flags = elf_elfheader (abfd)->e_flags;
7170 /* Ignore init flag - it may not be set, despite the flags field
7171 containing valid data. */
7172
7173 /* xgettext:c-format */
7174 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
7175
7176 switch (EF_ARM_EABI_VERSION (flags))
7177 {
7178 case EF_ARM_EABI_UNKNOWN:
7179 /* The following flag bits are GNU extensions and not part of the
7180 official ARM ELF extended ABI. Hence they are only decoded if
7181 the EABI version is not set. */
7182 if (flags & EF_ARM_INTERWORK)
7183 fprintf (file, _(" [interworking enabled]"));
7184
7185 if (flags & EF_ARM_APCS_26)
7186 fprintf (file, " [APCS-26]");
7187 else
7188 fprintf (file, " [APCS-32]");
7189
7190 if (flags & EF_ARM_VFP_FLOAT)
7191 fprintf (file, _(" [VFP float format]"));
7192 else if (flags & EF_ARM_MAVERICK_FLOAT)
7193 fprintf (file, _(" [Maverick float format]"));
7194 else
7195 fprintf (file, _(" [FPA float format]"));
7196
7197 if (flags & EF_ARM_APCS_FLOAT)
7198 fprintf (file, _(" [floats passed in float registers]"));
7199
7200 if (flags & EF_ARM_PIC)
7201 fprintf (file, _(" [position independent]"));
7202
7203 if (flags & EF_ARM_NEW_ABI)
7204 fprintf (file, _(" [new ABI]"));
7205
7206 if (flags & EF_ARM_OLD_ABI)
7207 fprintf (file, _(" [old ABI]"));
7208
7209 if (flags & EF_ARM_SOFT_FLOAT)
7210 fprintf (file, _(" [software FP]"));
7211
7212 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
7213 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
7214 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
7215 | EF_ARM_MAVERICK_FLOAT);
7216 break;
7217
7218 case EF_ARM_EABI_VER1:
7219 fprintf (file, _(" [Version1 EABI]"));
7220
7221 if (flags & EF_ARM_SYMSARESORTED)
7222 fprintf (file, _(" [sorted symbol table]"));
7223 else
7224 fprintf (file, _(" [unsorted symbol table]"));
7225
7226 flags &= ~ EF_ARM_SYMSARESORTED;
7227 break;
7228
7229 case EF_ARM_EABI_VER2:
7230 fprintf (file, _(" [Version2 EABI]"));
7231
7232 if (flags & EF_ARM_SYMSARESORTED)
7233 fprintf (file, _(" [sorted symbol table]"));
7234 else
7235 fprintf (file, _(" [unsorted symbol table]"));
7236
7237 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
7238 fprintf (file, _(" [dynamic symbols use segment index]"));
7239
7240 if (flags & EF_ARM_MAPSYMSFIRST)
7241 fprintf (file, _(" [mapping symbols precede others]"));
7242
7243 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
7244 | EF_ARM_MAPSYMSFIRST);
7245 break;
7246
7247 case EF_ARM_EABI_VER3:
7248 fprintf (file, _(" [Version3 EABI]"));
7249 break;
7250
7251 case EF_ARM_EABI_VER4:
7252 fprintf (file, _(" [Version4 EABI]"));
7253 goto eabi;
7254
7255 case EF_ARM_EABI_VER5:
7256 fprintf (file, _(" [Version5 EABI]"));
7257 eabi:
7258 if (flags & EF_ARM_BE8)
7259 fprintf (file, _(" [BE8]"));
7260
7261 if (flags & EF_ARM_LE8)
7262 fprintf (file, _(" [LE8]"));
7263
7264 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
7265 break;
7266
7267 default:
7268 fprintf (file, _(" <EABI version unrecognised>"));
7269 break;
7270 }
7271
7272 flags &= ~ EF_ARM_EABIMASK;
7273
7274 if (flags & EF_ARM_RELEXEC)
7275 fprintf (file, _(" [relocatable executable]"));
7276
7277 if (flags & EF_ARM_HASENTRY)
7278 fprintf (file, _(" [has entry point]"));
7279
7280 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
7281
7282 if (flags)
7283 fprintf (file, _("<Unrecognised flag bits set>"));
7284
7285 fputc ('\n', file);
7286
7287 return TRUE;
7288 }
7289
7290 static int
7291 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
7292 {
7293 switch (ELF_ST_TYPE (elf_sym->st_info))
7294 {
7295 case STT_ARM_TFUNC:
7296 return ELF_ST_TYPE (elf_sym->st_info);
7297
7298 case STT_ARM_16BIT:
7299 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
7300 This allows us to distinguish between data used by Thumb instructions
7301 and non-data (which is probably code) inside Thumb regions of an
7302 executable. */
7303 if (type != STT_OBJECT && type != STT_TLS)
7304 return ELF_ST_TYPE (elf_sym->st_info);
7305 break;
7306
7307 default:
7308 break;
7309 }
7310
7311 return type;
7312 }
7313
7314 static asection *
7315 elf32_arm_gc_mark_hook (asection *sec,
7316 struct bfd_link_info *info,
7317 Elf_Internal_Rela *rel,
7318 struct elf_link_hash_entry *h,
7319 Elf_Internal_Sym *sym)
7320 {
7321 if (h != NULL)
7322 switch (ELF32_R_TYPE (rel->r_info))
7323 {
7324 case R_ARM_GNU_VTINHERIT:
7325 case R_ARM_GNU_VTENTRY:
7326 return NULL;
7327 }
7328
7329 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
7330 }
7331
7332 /* Update the got entry reference counts for the section being removed. */
7333
7334 static bfd_boolean
7335 elf32_arm_gc_sweep_hook (bfd * abfd,
7336 struct bfd_link_info * info,
7337 asection * sec,
7338 const Elf_Internal_Rela * relocs)
7339 {
7340 Elf_Internal_Shdr *symtab_hdr;
7341 struct elf_link_hash_entry **sym_hashes;
7342 bfd_signed_vma *local_got_refcounts;
7343 const Elf_Internal_Rela *rel, *relend;
7344 struct elf32_arm_link_hash_table * globals;
7345
7346 globals = elf32_arm_hash_table (info);
7347
7348 elf_section_data (sec)->local_dynrel = NULL;
7349
7350 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7351 sym_hashes = elf_sym_hashes (abfd);
7352 local_got_refcounts = elf_local_got_refcounts (abfd);
7353
7354 check_use_blx(globals);
7355
7356 relend = relocs + sec->reloc_count;
7357 for (rel = relocs; rel < relend; rel++)
7358 {
7359 unsigned long r_symndx;
7360 struct elf_link_hash_entry *h = NULL;
7361 int r_type;
7362
7363 r_symndx = ELF32_R_SYM (rel->r_info);
7364 if (r_symndx >= symtab_hdr->sh_info)
7365 {
7366 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7367 while (h->root.type == bfd_link_hash_indirect
7368 || h->root.type == bfd_link_hash_warning)
7369 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7370 }
7371
7372 r_type = ELF32_R_TYPE (rel->r_info);
7373 r_type = arm_real_reloc_type (globals, r_type);
7374 switch (r_type)
7375 {
7376 case R_ARM_GOT32:
7377 case R_ARM_GOT_PREL:
7378 case R_ARM_TLS_GD32:
7379 case R_ARM_TLS_IE32:
7380 if (h != NULL)
7381 {
7382 if (h->got.refcount > 0)
7383 h->got.refcount -= 1;
7384 }
7385 else if (local_got_refcounts != NULL)
7386 {
7387 if (local_got_refcounts[r_symndx] > 0)
7388 local_got_refcounts[r_symndx] -= 1;
7389 }
7390 break;
7391
7392 case R_ARM_TLS_LDM32:
7393 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
7394 break;
7395
7396 case R_ARM_ABS32:
7397 case R_ARM_ABS32_NOI:
7398 case R_ARM_REL32:
7399 case R_ARM_REL32_NOI:
7400 case R_ARM_PC24:
7401 case R_ARM_PLT32:
7402 case R_ARM_CALL:
7403 case R_ARM_JUMP24:
7404 case R_ARM_PREL31:
7405 case R_ARM_THM_CALL:
7406 case R_ARM_THM_JUMP24:
7407 case R_ARM_THM_JUMP19:
7408 case R_ARM_MOVW_ABS_NC:
7409 case R_ARM_MOVT_ABS:
7410 case R_ARM_MOVW_PREL_NC:
7411 case R_ARM_MOVT_PREL:
7412 case R_ARM_THM_MOVW_ABS_NC:
7413 case R_ARM_THM_MOVT_ABS:
7414 case R_ARM_THM_MOVW_PREL_NC:
7415 case R_ARM_THM_MOVT_PREL:
7416 /* Should the interworking branches be here also? */
7417
7418 if (h != NULL)
7419 {
7420 struct elf32_arm_link_hash_entry *eh;
7421 struct elf32_arm_relocs_copied **pp;
7422 struct elf32_arm_relocs_copied *p;
7423
7424 eh = (struct elf32_arm_link_hash_entry *) h;
7425
7426 if (h->plt.refcount > 0)
7427 {
7428 h->plt.refcount -= 1;
7429 if (r_type == R_ARM_THM_CALL)
7430 eh->plt_maybe_thumb_refcount--;
7431
7432 if (r_type == R_ARM_THM_JUMP24
7433 || r_type == R_ARM_THM_JUMP19)
7434 eh->plt_thumb_refcount--;
7435 }
7436
7437 if (r_type == R_ARM_ABS32
7438 || r_type == R_ARM_REL32
7439 || r_type == R_ARM_ABS32_NOI
7440 || r_type == R_ARM_REL32_NOI)
7441 {
7442 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
7443 pp = &p->next)
7444 if (p->section == sec)
7445 {
7446 p->count -= 1;
7447 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
7448 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
7449 p->pc_count -= 1;
7450 if (p->count == 0)
7451 *pp = p->next;
7452 break;
7453 }
7454 }
7455 }
7456 break;
7457
7458 default:
7459 break;
7460 }
7461 }
7462
7463 return TRUE;
7464 }
7465
7466 /* Look through the relocs for a section during the first phase. */
7467
7468 static bfd_boolean
7469 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
7470 asection *sec, const Elf_Internal_Rela *relocs)
7471 {
7472 Elf_Internal_Shdr *symtab_hdr;
7473 struct elf_link_hash_entry **sym_hashes;
7474 struct elf_link_hash_entry **sym_hashes_end;
7475 const Elf_Internal_Rela *rel;
7476 const Elf_Internal_Rela *rel_end;
7477 bfd *dynobj;
7478 asection *sreloc;
7479 bfd_vma *local_got_offsets;
7480 struct elf32_arm_link_hash_table *htab;
7481
7482 if (info->relocatable)
7483 return TRUE;
7484
7485 htab = elf32_arm_hash_table (info);
7486 sreloc = NULL;
7487
7488 /* Create dynamic sections for relocatable executables so that we can
7489 copy relocations. */
7490 if (htab->root.is_relocatable_executable
7491 && ! htab->root.dynamic_sections_created)
7492 {
7493 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
7494 return FALSE;
7495 }
7496
7497 dynobj = elf_hash_table (info)->dynobj;
7498 local_got_offsets = elf_local_got_offsets (abfd);
7499
7500 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7501 sym_hashes = elf_sym_hashes (abfd);
7502 sym_hashes_end = sym_hashes
7503 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
7504
7505 if (!elf_bad_symtab (abfd))
7506 sym_hashes_end -= symtab_hdr->sh_info;
7507
7508 rel_end = relocs + sec->reloc_count;
7509 for (rel = relocs; rel < rel_end; rel++)
7510 {
7511 struct elf_link_hash_entry *h;
7512 struct elf32_arm_link_hash_entry *eh;
7513 unsigned long r_symndx;
7514 int r_type;
7515
7516 r_symndx = ELF32_R_SYM (rel->r_info);
7517 r_type = ELF32_R_TYPE (rel->r_info);
7518 r_type = arm_real_reloc_type (htab, r_type);
7519
7520 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
7521 {
7522 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
7523 r_symndx);
7524 return FALSE;
7525 }
7526
7527 if (r_symndx < symtab_hdr->sh_info)
7528 h = NULL;
7529 else
7530 {
7531 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7532 while (h->root.type == bfd_link_hash_indirect
7533 || h->root.type == bfd_link_hash_warning)
7534 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7535 }
7536
7537 eh = (struct elf32_arm_link_hash_entry *) h;
7538
7539 switch (r_type)
7540 {
7541 case R_ARM_GOT32:
7542 case R_ARM_GOT_PREL:
7543 case R_ARM_TLS_GD32:
7544 case R_ARM_TLS_IE32:
7545 /* This symbol requires a global offset table entry. */
7546 {
7547 int tls_type, old_tls_type;
7548
7549 switch (r_type)
7550 {
7551 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
7552 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
7553 default: tls_type = GOT_NORMAL; break;
7554 }
7555
7556 if (h != NULL)
7557 {
7558 h->got.refcount++;
7559 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
7560 }
7561 else
7562 {
7563 bfd_signed_vma *local_got_refcounts;
7564
7565 /* This is a global offset table entry for a local symbol. */
7566 local_got_refcounts = elf_local_got_refcounts (abfd);
7567 if (local_got_refcounts == NULL)
7568 {
7569 bfd_size_type size;
7570
7571 size = symtab_hdr->sh_info;
7572 size *= (sizeof (bfd_signed_vma) + sizeof(char));
7573 local_got_refcounts = bfd_zalloc (abfd, size);
7574 if (local_got_refcounts == NULL)
7575 return FALSE;
7576 elf_local_got_refcounts (abfd) = local_got_refcounts;
7577 elf32_arm_local_got_tls_type (abfd)
7578 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
7579 }
7580 local_got_refcounts[r_symndx] += 1;
7581 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
7582 }
7583
7584 /* We will already have issued an error message if there is a
7585 TLS / non-TLS mismatch, based on the symbol type. We don't
7586 support any linker relaxations. So just combine any TLS
7587 types needed. */
7588 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
7589 && tls_type != GOT_NORMAL)
7590 tls_type |= old_tls_type;
7591
7592 if (old_tls_type != tls_type)
7593 {
7594 if (h != NULL)
7595 elf32_arm_hash_entry (h)->tls_type = tls_type;
7596 else
7597 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
7598 }
7599 }
7600 /* Fall through */
7601
7602 case R_ARM_TLS_LDM32:
7603 if (r_type == R_ARM_TLS_LDM32)
7604 htab->tls_ldm_got.refcount++;
7605 /* Fall through */
7606
7607 case R_ARM_GOTOFF32:
7608 case R_ARM_GOTPC:
7609 if (htab->sgot == NULL)
7610 {
7611 if (htab->root.dynobj == NULL)
7612 htab->root.dynobj = abfd;
7613 if (!create_got_section (htab->root.dynobj, info))
7614 return FALSE;
7615 }
7616 break;
7617
7618 case R_ARM_ABS12:
7619 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
7620 ldr __GOTT_INDEX__ offsets. */
7621 if (!htab->vxworks_p)
7622 break;
7623 /* Fall through */
7624
7625 case R_ARM_ABS32:
7626 case R_ARM_ABS32_NOI:
7627 case R_ARM_REL32:
7628 case R_ARM_REL32_NOI:
7629 case R_ARM_PC24:
7630 case R_ARM_PLT32:
7631 case R_ARM_CALL:
7632 case R_ARM_JUMP24:
7633 case R_ARM_PREL31:
7634 case R_ARM_THM_CALL:
7635 case R_ARM_THM_JUMP24:
7636 case R_ARM_THM_JUMP19:
7637 case R_ARM_MOVW_ABS_NC:
7638 case R_ARM_MOVT_ABS:
7639 case R_ARM_MOVW_PREL_NC:
7640 case R_ARM_MOVT_PREL:
7641 case R_ARM_THM_MOVW_ABS_NC:
7642 case R_ARM_THM_MOVT_ABS:
7643 case R_ARM_THM_MOVW_PREL_NC:
7644 case R_ARM_THM_MOVT_PREL:
7645 /* Should the interworking branches be listed here? */
7646 if (h != NULL)
7647 {
7648 /* If this reloc is in a read-only section, we might
7649 need a copy reloc. We can't check reliably at this
7650 stage whether the section is read-only, as input
7651 sections have not yet been mapped to output sections.
7652 Tentatively set the flag for now, and correct in
7653 adjust_dynamic_symbol. */
7654 if (!info->shared)
7655 h->non_got_ref = 1;
7656
7657 /* We may need a .plt entry if the function this reloc
7658 refers to is in a different object. We can't tell for
7659 sure yet, because something later might force the
7660 symbol local. */
7661 if (r_type != R_ARM_ABS32
7662 && r_type != R_ARM_REL32
7663 && r_type != R_ARM_ABS32_NOI
7664 && r_type != R_ARM_REL32_NOI
7665 && r_type != R_ARM_ABS12)
7666 h->needs_plt = 1;
7667
7668 /* If we create a PLT entry, this relocation will reference
7669 it, even if it's an ABS32 relocation. */
7670 h->plt.refcount += 1;
7671
7672 /* It's too early to use htab->use_blx here, so we have to
7673 record possible blx references separately from
7674 relocs that definitely need a thumb stub. */
7675
7676 if (r_type == R_ARM_THM_CALL)
7677 eh->plt_maybe_thumb_refcount += 1;
7678
7679 if (r_type == R_ARM_THM_JUMP24
7680 || r_type == R_ARM_THM_JUMP19)
7681 eh->plt_thumb_refcount += 1;
7682 }
7683
7684 /* If we are creating a shared library or relocatable executable,
7685 and this is a reloc against a global symbol, or a non PC
7686 relative reloc against a local symbol, then we need to copy
7687 the reloc into the shared library. However, if we are linking
7688 with -Bsymbolic, we do not need to copy a reloc against a
7689 global symbol which is defined in an object we are
7690 including in the link (i.e., DEF_REGULAR is set). At
7691 this point we have not seen all the input files, so it is
7692 possible that DEF_REGULAR is not set now but will be set
7693 later (it is never cleared). We account for that
7694 possibility below by storing information in the
7695 relocs_copied field of the hash table entry. */
7696 if ((info->shared || htab->root.is_relocatable_executable)
7697 && (sec->flags & SEC_ALLOC) != 0
7698 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
7699 || (h != NULL && ! h->needs_plt
7700 && (! info->symbolic || ! h->def_regular))))
7701 {
7702 struct elf32_arm_relocs_copied *p, **head;
7703
7704 /* When creating a shared object, we must copy these
7705 reloc types into the output file. We create a reloc
7706 section in dynobj and make room for this reloc. */
7707 if (sreloc == NULL)
7708 {
7709 const char * name;
7710
7711 name = (bfd_elf_string_from_elf_section
7712 (abfd,
7713 elf_elfheader (abfd)->e_shstrndx,
7714 elf_section_data (sec)->rel_hdr.sh_name));
7715 if (name == NULL)
7716 return FALSE;
7717
7718 BFD_ASSERT (reloc_section_p (htab, name, sec));
7719
7720 sreloc = bfd_get_section_by_name (dynobj, name);
7721 if (sreloc == NULL)
7722 {
7723 flagword flags;
7724
7725 flags = (SEC_HAS_CONTENTS | SEC_READONLY
7726 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
7727 if ((sec->flags & SEC_ALLOC) != 0
7728 /* BPABI objects never have dynamic
7729 relocations mapped. */
7730 && !htab->symbian_p)
7731 flags |= SEC_ALLOC | SEC_LOAD;
7732 sreloc = bfd_make_section_with_flags (dynobj,
7733 name,
7734 flags);
7735 if (sreloc == NULL
7736 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
7737 return FALSE;
7738 }
7739
7740 elf_section_data (sec)->sreloc = sreloc;
7741 }
7742
7743 /* If this is a global symbol, we count the number of
7744 relocations we need for this symbol. */
7745 if (h != NULL)
7746 {
7747 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
7748 }
7749 else
7750 {
7751 /* Track dynamic relocs needed for local syms too.
7752 We really need local syms available to do this
7753 easily. Oh well. */
7754
7755 asection *s;
7756 void *vpp;
7757
7758 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
7759 sec, r_symndx);
7760 if (s == NULL)
7761 return FALSE;
7762
7763 vpp = &elf_section_data (s)->local_dynrel;
7764 head = (struct elf32_arm_relocs_copied **) vpp;
7765 }
7766
7767 p = *head;
7768 if (p == NULL || p->section != sec)
7769 {
7770 bfd_size_type amt = sizeof *p;
7771
7772 p = bfd_alloc (htab->root.dynobj, amt);
7773 if (p == NULL)
7774 return FALSE;
7775 p->next = *head;
7776 *head = p;
7777 p->section = sec;
7778 p->count = 0;
7779 p->pc_count = 0;
7780 }
7781
7782 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
7783 p->pc_count += 1;
7784 p->count += 1;
7785 }
7786 break;
7787
7788 /* This relocation describes the C++ object vtable hierarchy.
7789 Reconstruct it for later use during GC. */
7790 case R_ARM_GNU_VTINHERIT:
7791 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
7792 return FALSE;
7793 break;
7794
7795 /* This relocation describes which C++ vtable entries are actually
7796 used. Record for later use during GC. */
7797 case R_ARM_GNU_VTENTRY:
7798 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
7799 return FALSE;
7800 break;
7801 }
7802 }
7803
7804 return TRUE;
7805 }
7806
7807 /* Unwinding tables are not referenced directly. This pass marks them as
7808 required if the corresponding code section is marked. */
7809
7810 static bfd_boolean
7811 elf32_arm_gc_mark_extra_sections(struct bfd_link_info *info,
7812 elf_gc_mark_hook_fn gc_mark_hook)
7813 {
7814 bfd *sub;
7815 Elf_Internal_Shdr **elf_shdrp;
7816 bfd_boolean again;
7817
7818 /* Marking EH data may cause additional code sections to be marked,
7819 requiring multiple passes. */
7820 again = TRUE;
7821 while (again)
7822 {
7823 again = FALSE;
7824 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
7825 {
7826 asection *o;
7827
7828 if (bfd_get_flavour (sub) != bfd_target_elf_flavour)
7829 continue;
7830
7831 elf_shdrp = elf_elfsections (sub);
7832 for (o = sub->sections; o != NULL; o = o->next)
7833 {
7834 Elf_Internal_Shdr *hdr;
7835 hdr = &elf_section_data (o)->this_hdr;
7836 if (hdr->sh_type == SHT_ARM_EXIDX && hdr->sh_link
7837 && !o->gc_mark
7838 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
7839 {
7840 again = TRUE;
7841 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
7842 return FALSE;
7843 }
7844 }
7845 }
7846 }
7847
7848 return TRUE;
7849 }
7850
7851 /* Treat mapping symbols as special target symbols. */
7852
7853 static bfd_boolean
7854 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
7855 {
7856 return bfd_is_arm_special_symbol_name (sym->name,
7857 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
7858 }
7859
7860 /* This is a copy of elf_find_function() from elf.c except that
7861 ARM mapping symbols are ignored when looking for function names
7862 and STT_ARM_TFUNC is considered to a function type. */
7863
7864 static bfd_boolean
7865 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
7866 asection * section,
7867 asymbol ** symbols,
7868 bfd_vma offset,
7869 const char ** filename_ptr,
7870 const char ** functionname_ptr)
7871 {
7872 const char * filename = NULL;
7873 asymbol * func = NULL;
7874 bfd_vma low_func = 0;
7875 asymbol ** p;
7876
7877 for (p = symbols; *p != NULL; p++)
7878 {
7879 elf_symbol_type *q;
7880
7881 q = (elf_symbol_type *) *p;
7882
7883 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7884 {
7885 default:
7886 break;
7887 case STT_FILE:
7888 filename = bfd_asymbol_name (&q->symbol);
7889 break;
7890 case STT_FUNC:
7891 case STT_ARM_TFUNC:
7892 case STT_NOTYPE:
7893 /* Skip mapping symbols. */
7894 if ((q->symbol.flags & BSF_LOCAL)
7895 && bfd_is_arm_special_symbol_name (q->symbol.name,
7896 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
7897 continue;
7898 /* Fall through. */
7899 if (bfd_get_section (&q->symbol) == section
7900 && q->symbol.value >= low_func
7901 && q->symbol.value <= offset)
7902 {
7903 func = (asymbol *) q;
7904 low_func = q->symbol.value;
7905 }
7906 break;
7907 }
7908 }
7909
7910 if (func == NULL)
7911 return FALSE;
7912
7913 if (filename_ptr)
7914 *filename_ptr = filename;
7915 if (functionname_ptr)
7916 *functionname_ptr = bfd_asymbol_name (func);
7917
7918 return TRUE;
7919 }
7920
7921
7922 /* Find the nearest line to a particular section and offset, for error
7923 reporting. This code is a duplicate of the code in elf.c, except
7924 that it uses arm_elf_find_function. */
7925
7926 static bfd_boolean
7927 elf32_arm_find_nearest_line (bfd * abfd,
7928 asection * section,
7929 asymbol ** symbols,
7930 bfd_vma offset,
7931 const char ** filename_ptr,
7932 const char ** functionname_ptr,
7933 unsigned int * line_ptr)
7934 {
7935 bfd_boolean found = FALSE;
7936
7937 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
7938
7939 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7940 filename_ptr, functionname_ptr,
7941 line_ptr, 0,
7942 & elf_tdata (abfd)->dwarf2_find_line_info))
7943 {
7944 if (!*functionname_ptr)
7945 arm_elf_find_function (abfd, section, symbols, offset,
7946 *filename_ptr ? NULL : filename_ptr,
7947 functionname_ptr);
7948
7949 return TRUE;
7950 }
7951
7952 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7953 & found, filename_ptr,
7954 functionname_ptr, line_ptr,
7955 & elf_tdata (abfd)->line_info))
7956 return FALSE;
7957
7958 if (found && (*functionname_ptr || *line_ptr))
7959 return TRUE;
7960
7961 if (symbols == NULL)
7962 return FALSE;
7963
7964 if (! arm_elf_find_function (abfd, section, symbols, offset,
7965 filename_ptr, functionname_ptr))
7966 return FALSE;
7967
7968 *line_ptr = 0;
7969 return TRUE;
7970 }
7971
7972 static bfd_boolean
7973 elf32_arm_find_inliner_info (bfd * abfd,
7974 const char ** filename_ptr,
7975 const char ** functionname_ptr,
7976 unsigned int * line_ptr)
7977 {
7978 bfd_boolean found;
7979 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7980 functionname_ptr, line_ptr,
7981 & elf_tdata (abfd)->dwarf2_find_line_info);
7982 return found;
7983 }
7984
7985 /* Adjust a symbol defined by a dynamic object and referenced by a
7986 regular object. The current definition is in some section of the
7987 dynamic object, but we're not including those sections. We have to
7988 change the definition to something the rest of the link can
7989 understand. */
7990
7991 static bfd_boolean
7992 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
7993 struct elf_link_hash_entry * h)
7994 {
7995 bfd * dynobj;
7996 asection * s;
7997 struct elf32_arm_link_hash_entry * eh;
7998 struct elf32_arm_link_hash_table *globals;
7999
8000 globals = elf32_arm_hash_table (info);
8001 dynobj = elf_hash_table (info)->dynobj;
8002
8003 /* Make sure we know what is going on here. */
8004 BFD_ASSERT (dynobj != NULL
8005 && (h->needs_plt
8006 || h->u.weakdef != NULL
8007 || (h->def_dynamic
8008 && h->ref_regular
8009 && !h->def_regular)));
8010
8011 eh = (struct elf32_arm_link_hash_entry *) h;
8012
8013 /* If this is a function, put it in the procedure linkage table. We
8014 will fill in the contents of the procedure linkage table later,
8015 when we know the address of the .got section. */
8016 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
8017 || h->needs_plt)
8018 {
8019 if (h->plt.refcount <= 0
8020 || SYMBOL_CALLS_LOCAL (info, h)
8021 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8022 && h->root.type == bfd_link_hash_undefweak))
8023 {
8024 /* This case can occur if we saw a PLT32 reloc in an input
8025 file, but the symbol was never referred to by a dynamic
8026 object, or if all references were garbage collected. In
8027 such a case, we don't actually need to build a procedure
8028 linkage table, and we can just do a PC24 reloc instead. */
8029 h->plt.offset = (bfd_vma) -1;
8030 eh->plt_thumb_refcount = 0;
8031 eh->plt_maybe_thumb_refcount = 0;
8032 h->needs_plt = 0;
8033 }
8034
8035 return TRUE;
8036 }
8037 else
8038 {
8039 /* It's possible that we incorrectly decided a .plt reloc was
8040 needed for an R_ARM_PC24 or similar reloc to a non-function sym
8041 in check_relocs. We can't decide accurately between function
8042 and non-function syms in check-relocs; Objects loaded later in
8043 the link may change h->type. So fix it now. */
8044 h->plt.offset = (bfd_vma) -1;
8045 eh->plt_thumb_refcount = 0;
8046 eh->plt_maybe_thumb_refcount = 0;
8047 }
8048
8049 /* If this is a weak symbol, and there is a real definition, the
8050 processor independent code will have arranged for us to see the
8051 real definition first, and we can just use the same value. */
8052 if (h->u.weakdef != NULL)
8053 {
8054 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
8055 || h->u.weakdef->root.type == bfd_link_hash_defweak);
8056 h->root.u.def.section = h->u.weakdef->root.u.def.section;
8057 h->root.u.def.value = h->u.weakdef->root.u.def.value;
8058 return TRUE;
8059 }
8060
8061 /* If there are no non-GOT references, we do not need a copy
8062 relocation. */
8063 if (!h->non_got_ref)
8064 return TRUE;
8065
8066 /* This is a reference to a symbol defined by a dynamic object which
8067 is not a function. */
8068
8069 /* If we are creating a shared library, we must presume that the
8070 only references to the symbol are via the global offset table.
8071 For such cases we need not do anything here; the relocations will
8072 be handled correctly by relocate_section. Relocatable executables
8073 can reference data in shared objects directly, so we don't need to
8074 do anything here. */
8075 if (info->shared || globals->root.is_relocatable_executable)
8076 return TRUE;
8077
8078 if (h->size == 0)
8079 {
8080 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
8081 h->root.root.string);
8082 return TRUE;
8083 }
8084
8085 /* We must allocate the symbol in our .dynbss section, which will
8086 become part of the .bss section of the executable. There will be
8087 an entry for this symbol in the .dynsym section. The dynamic
8088 object will contain position independent code, so all references
8089 from the dynamic object to this symbol will go through the global
8090 offset table. The dynamic linker will use the .dynsym entry to
8091 determine the address it must put in the global offset table, so
8092 both the dynamic object and the regular object will refer to the
8093 same memory location for the variable. */
8094 s = bfd_get_section_by_name (dynobj, ".dynbss");
8095 BFD_ASSERT (s != NULL);
8096
8097 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
8098 copy the initial value out of the dynamic object and into the
8099 runtime process image. We need to remember the offset into the
8100 .rel(a).bss section we are going to use. */
8101 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
8102 {
8103 asection *srel;
8104
8105 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
8106 BFD_ASSERT (srel != NULL);
8107 srel->size += RELOC_SIZE (globals);
8108 h->needs_copy = 1;
8109 }
8110
8111 return _bfd_elf_adjust_dynamic_copy (h, s);
8112 }
8113
8114 /* Allocate space in .plt, .got and associated reloc sections for
8115 dynamic relocs. */
8116
8117 static bfd_boolean
8118 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
8119 {
8120 struct bfd_link_info *info;
8121 struct elf32_arm_link_hash_table *htab;
8122 struct elf32_arm_link_hash_entry *eh;
8123 struct elf32_arm_relocs_copied *p;
8124 bfd_signed_vma thumb_refs;
8125
8126 eh = (struct elf32_arm_link_hash_entry *) h;
8127
8128 if (h->root.type == bfd_link_hash_indirect)
8129 return TRUE;
8130
8131 if (h->root.type == bfd_link_hash_warning)
8132 /* When warning symbols are created, they **replace** the "real"
8133 entry in the hash table, thus we never get to see the real
8134 symbol in a hash traversal. So look at it now. */
8135 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8136
8137 info = (struct bfd_link_info *) inf;
8138 htab = elf32_arm_hash_table (info);
8139
8140 if (htab->root.dynamic_sections_created
8141 && h->plt.refcount > 0)
8142 {
8143 /* Make sure this symbol is output as a dynamic symbol.
8144 Undefined weak syms won't yet be marked as dynamic. */
8145 if (h->dynindx == -1
8146 && !h->forced_local)
8147 {
8148 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8149 return FALSE;
8150 }
8151
8152 if (info->shared
8153 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
8154 {
8155 asection *s = htab->splt;
8156
8157 /* If this is the first .plt entry, make room for the special
8158 first entry. */
8159 if (s->size == 0)
8160 s->size += htab->plt_header_size;
8161
8162 h->plt.offset = s->size;
8163
8164 /* If we will insert a Thumb trampoline before this PLT, leave room
8165 for it. */
8166 thumb_refs = eh->plt_thumb_refcount;
8167 if (!htab->use_blx)
8168 thumb_refs += eh->plt_maybe_thumb_refcount;
8169
8170 if (thumb_refs > 0)
8171 {
8172 h->plt.offset += PLT_THUMB_STUB_SIZE;
8173 s->size += PLT_THUMB_STUB_SIZE;
8174 }
8175
8176 /* If this symbol is not defined in a regular file, and we are
8177 not generating a shared library, then set the symbol to this
8178 location in the .plt. This is required to make function
8179 pointers compare as equal between the normal executable and
8180 the shared library. */
8181 if (! info->shared
8182 && !h->def_regular)
8183 {
8184 h->root.u.def.section = s;
8185 h->root.u.def.value = h->plt.offset;
8186
8187 /* Make sure the function is not marked as Thumb, in case
8188 it is the target of an ABS32 relocation, which will
8189 point to the PLT entry. */
8190 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
8191 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8192 }
8193
8194 /* Make room for this entry. */
8195 s->size += htab->plt_entry_size;
8196
8197 if (!htab->symbian_p)
8198 {
8199 /* We also need to make an entry in the .got.plt section, which
8200 will be placed in the .got section by the linker script. */
8201 eh->plt_got_offset = htab->sgotplt->size;
8202 htab->sgotplt->size += 4;
8203 }
8204
8205 /* We also need to make an entry in the .rel(a).plt section. */
8206 htab->srelplt->size += RELOC_SIZE (htab);
8207
8208 /* VxWorks executables have a second set of relocations for
8209 each PLT entry. They go in a separate relocation section,
8210 which is processed by the kernel loader. */
8211 if (htab->vxworks_p && !info->shared)
8212 {
8213 /* There is a relocation for the initial PLT entry:
8214 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
8215 if (h->plt.offset == htab->plt_header_size)
8216 htab->srelplt2->size += RELOC_SIZE (htab);
8217
8218 /* There are two extra relocations for each subsequent
8219 PLT entry: an R_ARM_32 relocation for the GOT entry,
8220 and an R_ARM_32 relocation for the PLT entry. */
8221 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
8222 }
8223 }
8224 else
8225 {
8226 h->plt.offset = (bfd_vma) -1;
8227 h->needs_plt = 0;
8228 }
8229 }
8230 else
8231 {
8232 h->plt.offset = (bfd_vma) -1;
8233 h->needs_plt = 0;
8234 }
8235
8236 if (h->got.refcount > 0)
8237 {
8238 asection *s;
8239 bfd_boolean dyn;
8240 int tls_type = elf32_arm_hash_entry (h)->tls_type;
8241 int indx;
8242
8243 /* Make sure this symbol is output as a dynamic symbol.
8244 Undefined weak syms won't yet be marked as dynamic. */
8245 if (h->dynindx == -1
8246 && !h->forced_local)
8247 {
8248 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8249 return FALSE;
8250 }
8251
8252 if (!htab->symbian_p)
8253 {
8254 s = htab->sgot;
8255 h->got.offset = s->size;
8256
8257 if (tls_type == GOT_UNKNOWN)
8258 abort ();
8259
8260 if (tls_type == GOT_NORMAL)
8261 /* Non-TLS symbols need one GOT slot. */
8262 s->size += 4;
8263 else
8264 {
8265 if (tls_type & GOT_TLS_GD)
8266 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
8267 s->size += 8;
8268 if (tls_type & GOT_TLS_IE)
8269 /* R_ARM_TLS_IE32 needs one GOT slot. */
8270 s->size += 4;
8271 }
8272
8273 dyn = htab->root.dynamic_sections_created;
8274
8275 indx = 0;
8276 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8277 && (!info->shared
8278 || !SYMBOL_REFERENCES_LOCAL (info, h)))
8279 indx = h->dynindx;
8280
8281 if (tls_type != GOT_NORMAL
8282 && (info->shared || indx != 0)
8283 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8284 || h->root.type != bfd_link_hash_undefweak))
8285 {
8286 if (tls_type & GOT_TLS_IE)
8287 htab->srelgot->size += RELOC_SIZE (htab);
8288
8289 if (tls_type & GOT_TLS_GD)
8290 htab->srelgot->size += RELOC_SIZE (htab);
8291
8292 if ((tls_type & GOT_TLS_GD) && indx != 0)
8293 htab->srelgot->size += RELOC_SIZE (htab);
8294 }
8295 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8296 || h->root.type != bfd_link_hash_undefweak)
8297 && (info->shared
8298 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
8299 htab->srelgot->size += RELOC_SIZE (htab);
8300 }
8301 }
8302 else
8303 h->got.offset = (bfd_vma) -1;
8304
8305 /* Allocate stubs for exported Thumb functions on v4t. */
8306 if (!htab->use_blx && h->dynindx != -1
8307 && h->def_regular
8308 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
8309 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
8310 {
8311 struct elf_link_hash_entry * th;
8312 struct bfd_link_hash_entry * bh;
8313 struct elf_link_hash_entry * myh;
8314 char name[1024];
8315 asection *s;
8316 bh = NULL;
8317 /* Create a new symbol to regist the real location of the function. */
8318 s = h->root.u.def.section;
8319 sprintf(name, "__real_%s", h->root.root.string);
8320 _bfd_generic_link_add_one_symbol (info, s->owner,
8321 name, BSF_GLOBAL, s,
8322 h->root.u.def.value,
8323 NULL, TRUE, FALSE, &bh);
8324
8325 myh = (struct elf_link_hash_entry *) bh;
8326 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
8327 myh->forced_local = 1;
8328 eh->export_glue = myh;
8329 th = record_arm_to_thumb_glue (info, h);
8330 /* Point the symbol at the stub. */
8331 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
8332 h->root.u.def.section = th->root.u.def.section;
8333 h->root.u.def.value = th->root.u.def.value & ~1;
8334 }
8335
8336 if (eh->relocs_copied == NULL)
8337 return TRUE;
8338
8339 /* In the shared -Bsymbolic case, discard space allocated for
8340 dynamic pc-relative relocs against symbols which turn out to be
8341 defined in regular objects. For the normal shared case, discard
8342 space for pc-relative relocs that have become local due to symbol
8343 visibility changes. */
8344
8345 if (info->shared || htab->root.is_relocatable_executable)
8346 {
8347 /* The only relocs that use pc_count are R_ARM_REL32 and
8348 R_ARM_REL32_NOI, which will appear on something like
8349 ".long foo - .". We want calls to protected symbols to resolve
8350 directly to the function rather than going via the plt. If people
8351 want function pointer comparisons to work as expected then they
8352 should avoid writing assembly like ".long foo - .". */
8353 if (SYMBOL_CALLS_LOCAL (info, h))
8354 {
8355 struct elf32_arm_relocs_copied **pp;
8356
8357 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
8358 {
8359 p->count -= p->pc_count;
8360 p->pc_count = 0;
8361 if (p->count == 0)
8362 *pp = p->next;
8363 else
8364 pp = &p->next;
8365 }
8366 }
8367
8368 /* Also discard relocs on undefined weak syms with non-default
8369 visibility. */
8370 if (eh->relocs_copied != NULL
8371 && h->root.type == bfd_link_hash_undefweak)
8372 {
8373 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8374 eh->relocs_copied = NULL;
8375
8376 /* Make sure undefined weak symbols are output as a dynamic
8377 symbol in PIEs. */
8378 else if (h->dynindx == -1
8379 && !h->forced_local)
8380 {
8381 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8382 return FALSE;
8383 }
8384 }
8385
8386 else if (htab->root.is_relocatable_executable && h->dynindx == -1
8387 && h->root.type == bfd_link_hash_new)
8388 {
8389 /* Output absolute symbols so that we can create relocations
8390 against them. For normal symbols we output a relocation
8391 against the section that contains them. */
8392 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8393 return FALSE;
8394 }
8395
8396 }
8397 else
8398 {
8399 /* For the non-shared case, discard space for relocs against
8400 symbols which turn out to need copy relocs or are not
8401 dynamic. */
8402
8403 if (!h->non_got_ref
8404 && ((h->def_dynamic
8405 && !h->def_regular)
8406 || (htab->root.dynamic_sections_created
8407 && (h->root.type == bfd_link_hash_undefweak
8408 || h->root.type == bfd_link_hash_undefined))))
8409 {
8410 /* Make sure this symbol is output as a dynamic symbol.
8411 Undefined weak syms won't yet be marked as dynamic. */
8412 if (h->dynindx == -1
8413 && !h->forced_local)
8414 {
8415 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8416 return FALSE;
8417 }
8418
8419 /* If that succeeded, we know we'll be keeping all the
8420 relocs. */
8421 if (h->dynindx != -1)
8422 goto keep;
8423 }
8424
8425 eh->relocs_copied = NULL;
8426
8427 keep: ;
8428 }
8429
8430 /* Finally, allocate space. */
8431 for (p = eh->relocs_copied; p != NULL; p = p->next)
8432 {
8433 asection *sreloc = elf_section_data (p->section)->sreloc;
8434 sreloc->size += p->count * RELOC_SIZE (htab);
8435 }
8436
8437 return TRUE;
8438 }
8439
8440 /* Find any dynamic relocs that apply to read-only sections. */
8441
8442 static bfd_boolean
8443 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
8444 {
8445 struct elf32_arm_link_hash_entry *eh;
8446 struct elf32_arm_relocs_copied *p;
8447
8448 if (h->root.type == bfd_link_hash_warning)
8449 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8450
8451 eh = (struct elf32_arm_link_hash_entry *) h;
8452 for (p = eh->relocs_copied; p != NULL; p = p->next)
8453 {
8454 asection *s = p->section;
8455
8456 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8457 {
8458 struct bfd_link_info *info = (struct bfd_link_info *) inf;
8459
8460 info->flags |= DF_TEXTREL;
8461
8462 /* Not an error, just cut short the traversal. */
8463 return FALSE;
8464 }
8465 }
8466 return TRUE;
8467 }
8468
8469 void
8470 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
8471 int byteswap_code)
8472 {
8473 struct elf32_arm_link_hash_table *globals;
8474
8475 globals = elf32_arm_hash_table (info);
8476 globals->byteswap_code = byteswap_code;
8477 }
8478
8479 /* Set the sizes of the dynamic sections. */
8480
8481 static bfd_boolean
8482 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
8483 struct bfd_link_info * info)
8484 {
8485 bfd * dynobj;
8486 asection * s;
8487 bfd_boolean plt;
8488 bfd_boolean relocs;
8489 bfd *ibfd;
8490 struct elf32_arm_link_hash_table *htab;
8491
8492 htab = elf32_arm_hash_table (info);
8493 dynobj = elf_hash_table (info)->dynobj;
8494 BFD_ASSERT (dynobj != NULL);
8495 check_use_blx (htab);
8496
8497 if (elf_hash_table (info)->dynamic_sections_created)
8498 {
8499 /* Set the contents of the .interp section to the interpreter. */
8500 if (info->executable)
8501 {
8502 s = bfd_get_section_by_name (dynobj, ".interp");
8503 BFD_ASSERT (s != NULL);
8504 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8505 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8506 }
8507 }
8508
8509 /* Set up .got offsets for local syms, and space for local dynamic
8510 relocs. */
8511 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8512 {
8513 bfd_signed_vma *local_got;
8514 bfd_signed_vma *end_local_got;
8515 char *local_tls_type;
8516 bfd_size_type locsymcount;
8517 Elf_Internal_Shdr *symtab_hdr;
8518 asection *srel;
8519
8520 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
8521 continue;
8522
8523 for (s = ibfd->sections; s != NULL; s = s->next)
8524 {
8525 struct elf32_arm_relocs_copied *p;
8526
8527 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8528 {
8529 if (!bfd_is_abs_section (p->section)
8530 && bfd_is_abs_section (p->section->output_section))
8531 {
8532 /* Input section has been discarded, either because
8533 it is a copy of a linkonce section or due to
8534 linker script /DISCARD/, so we'll be discarding
8535 the relocs too. */
8536 }
8537 else if (p->count != 0)
8538 {
8539 srel = elf_section_data (p->section)->sreloc;
8540 srel->size += p->count * RELOC_SIZE (htab);
8541 if ((p->section->output_section->flags & SEC_READONLY) != 0)
8542 info->flags |= DF_TEXTREL;
8543 }
8544 }
8545 }
8546
8547 local_got = elf_local_got_refcounts (ibfd);
8548 if (!local_got)
8549 continue;
8550
8551 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
8552 locsymcount = symtab_hdr->sh_info;
8553 end_local_got = local_got + locsymcount;
8554 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
8555 s = htab->sgot;
8556 srel = htab->srelgot;
8557 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
8558 {
8559 if (*local_got > 0)
8560 {
8561 *local_got = s->size;
8562 if (*local_tls_type & GOT_TLS_GD)
8563 /* TLS_GD relocs need an 8-byte structure in the GOT. */
8564 s->size += 8;
8565 if (*local_tls_type & GOT_TLS_IE)
8566 s->size += 4;
8567 if (*local_tls_type == GOT_NORMAL)
8568 s->size += 4;
8569
8570 if (info->shared || *local_tls_type == GOT_TLS_GD)
8571 srel->size += RELOC_SIZE (htab);
8572 }
8573 else
8574 *local_got = (bfd_vma) -1;
8575 }
8576 }
8577
8578 if (htab->tls_ldm_got.refcount > 0)
8579 {
8580 /* Allocate two GOT entries and one dynamic relocation (if necessary)
8581 for R_ARM_TLS_LDM32 relocations. */
8582 htab->tls_ldm_got.offset = htab->sgot->size;
8583 htab->sgot->size += 8;
8584 if (info->shared)
8585 htab->srelgot->size += RELOC_SIZE (htab);
8586 }
8587 else
8588 htab->tls_ldm_got.offset = -1;
8589
8590 /* Allocate global sym .plt and .got entries, and space for global
8591 sym dynamic relocs. */
8592 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
8593
8594 /* Here we rummage through the found bfds to collect glue information. */
8595 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8596 {
8597 /* Initialise mapping tables for code/data. */
8598 bfd_elf32_arm_init_maps (ibfd);
8599
8600 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
8601 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
8602 /* xgettext:c-format */
8603 _bfd_error_handler (_("Errors encountered processing file %s"),
8604 ibfd->filename);
8605 }
8606
8607 /* The check_relocs and adjust_dynamic_symbol entry points have
8608 determined the sizes of the various dynamic sections. Allocate
8609 memory for them. */
8610 plt = FALSE;
8611 relocs = FALSE;
8612 for (s = dynobj->sections; s != NULL; s = s->next)
8613 {
8614 const char * name;
8615
8616 if ((s->flags & SEC_LINKER_CREATED) == 0)
8617 continue;
8618
8619 /* It's OK to base decisions on the section name, because none
8620 of the dynobj section names depend upon the input files. */
8621 name = bfd_get_section_name (dynobj, s);
8622
8623 if (strcmp (name, ".plt") == 0)
8624 {
8625 /* Remember whether there is a PLT. */
8626 plt = s->size != 0;
8627 }
8628 else if (CONST_STRNEQ (name, ".rel"))
8629 {
8630 if (s->size != 0)
8631 {
8632 /* Remember whether there are any reloc sections other
8633 than .rel(a).plt and .rela.plt.unloaded. */
8634 if (s != htab->srelplt && s != htab->srelplt2)
8635 relocs = TRUE;
8636
8637 /* We use the reloc_count field as a counter if we need
8638 to copy relocs into the output file. */
8639 s->reloc_count = 0;
8640 }
8641 }
8642 else if (! CONST_STRNEQ (name, ".got")
8643 && strcmp (name, ".dynbss") != 0)
8644 {
8645 /* It's not one of our sections, so don't allocate space. */
8646 continue;
8647 }
8648
8649 if (s->size == 0)
8650 {
8651 /* If we don't need this section, strip it from the
8652 output file. This is mostly to handle .rel(a).bss and
8653 .rel(a).plt. We must create both sections in
8654 create_dynamic_sections, because they must be created
8655 before the linker maps input sections to output
8656 sections. The linker does that before
8657 adjust_dynamic_symbol is called, and it is that
8658 function which decides whether anything needs to go
8659 into these sections. */
8660 s->flags |= SEC_EXCLUDE;
8661 continue;
8662 }
8663
8664 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8665 continue;
8666
8667 /* Allocate memory for the section contents. */
8668 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
8669 if (s->contents == NULL)
8670 return FALSE;
8671 }
8672
8673 if (elf_hash_table (info)->dynamic_sections_created)
8674 {
8675 /* Add some entries to the .dynamic section. We fill in the
8676 values later, in elf32_arm_finish_dynamic_sections, but we
8677 must add the entries now so that we get the correct size for
8678 the .dynamic section. The DT_DEBUG entry is filled in by the
8679 dynamic linker and used by the debugger. */
8680 #define add_dynamic_entry(TAG, VAL) \
8681 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8682
8683 if (info->executable)
8684 {
8685 if (!add_dynamic_entry (DT_DEBUG, 0))
8686 return FALSE;
8687 }
8688
8689 if (plt)
8690 {
8691 if ( !add_dynamic_entry (DT_PLTGOT, 0)
8692 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8693 || !add_dynamic_entry (DT_PLTREL,
8694 htab->use_rel ? DT_REL : DT_RELA)
8695 || !add_dynamic_entry (DT_JMPREL, 0))
8696 return FALSE;
8697 }
8698
8699 if (relocs)
8700 {
8701 if (htab->use_rel)
8702 {
8703 if (!add_dynamic_entry (DT_REL, 0)
8704 || !add_dynamic_entry (DT_RELSZ, 0)
8705 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
8706 return FALSE;
8707 }
8708 else
8709 {
8710 if (!add_dynamic_entry (DT_RELA, 0)
8711 || !add_dynamic_entry (DT_RELASZ, 0)
8712 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
8713 return FALSE;
8714 }
8715 }
8716
8717 /* If any dynamic relocs apply to a read-only section,
8718 then we need a DT_TEXTREL entry. */
8719 if ((info->flags & DF_TEXTREL) == 0)
8720 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
8721 (PTR) info);
8722
8723 if ((info->flags & DF_TEXTREL) != 0)
8724 {
8725 if (!add_dynamic_entry (DT_TEXTREL, 0))
8726 return FALSE;
8727 }
8728 }
8729 #undef add_dynamic_entry
8730
8731 return TRUE;
8732 }
8733
8734 /* Finish up dynamic symbol handling. We set the contents of various
8735 dynamic sections here. */
8736
8737 static bfd_boolean
8738 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
8739 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
8740 {
8741 bfd * dynobj;
8742 struct elf32_arm_link_hash_table *htab;
8743 struct elf32_arm_link_hash_entry *eh;
8744
8745 dynobj = elf_hash_table (info)->dynobj;
8746 htab = elf32_arm_hash_table (info);
8747 eh = (struct elf32_arm_link_hash_entry *) h;
8748
8749 if (h->plt.offset != (bfd_vma) -1)
8750 {
8751 asection * splt;
8752 asection * srel;
8753 bfd_byte *loc;
8754 bfd_vma plt_index;
8755 Elf_Internal_Rela rel;
8756
8757 /* This symbol has an entry in the procedure linkage table. Set
8758 it up. */
8759
8760 BFD_ASSERT (h->dynindx != -1);
8761
8762 splt = bfd_get_section_by_name (dynobj, ".plt");
8763 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
8764 BFD_ASSERT (splt != NULL && srel != NULL);
8765
8766 /* Fill in the entry in the procedure linkage table. */
8767 if (htab->symbian_p)
8768 {
8769 put_arm_insn (htab, output_bfd,
8770 elf32_arm_symbian_plt_entry[0],
8771 splt->contents + h->plt.offset);
8772 bfd_put_32 (output_bfd,
8773 elf32_arm_symbian_plt_entry[1],
8774 splt->contents + h->plt.offset + 4);
8775
8776 /* Fill in the entry in the .rel.plt section. */
8777 rel.r_offset = (splt->output_section->vma
8778 + splt->output_offset
8779 + h->plt.offset + 4);
8780 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8781
8782 /* Get the index in the procedure linkage table which
8783 corresponds to this symbol. This is the index of this symbol
8784 in all the symbols for which we are making plt entries. The
8785 first entry in the procedure linkage table is reserved. */
8786 plt_index = ((h->plt.offset - htab->plt_header_size)
8787 / htab->plt_entry_size);
8788 }
8789 else
8790 {
8791 bfd_vma got_offset, got_address, plt_address;
8792 bfd_vma got_displacement;
8793 asection * sgot;
8794 bfd_byte * ptr;
8795
8796 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
8797 BFD_ASSERT (sgot != NULL);
8798
8799 /* Get the offset into the .got.plt table of the entry that
8800 corresponds to this function. */
8801 got_offset = eh->plt_got_offset;
8802
8803 /* Get the index in the procedure linkage table which
8804 corresponds to this symbol. This is the index of this symbol
8805 in all the symbols for which we are making plt entries. The
8806 first three entries in .got.plt are reserved; after that
8807 symbols appear in the same order as in .plt. */
8808 plt_index = (got_offset - 12) / 4;
8809
8810 /* Calculate the address of the GOT entry. */
8811 got_address = (sgot->output_section->vma
8812 + sgot->output_offset
8813 + got_offset);
8814
8815 /* ...and the address of the PLT entry. */
8816 plt_address = (splt->output_section->vma
8817 + splt->output_offset
8818 + h->plt.offset);
8819
8820 ptr = htab->splt->contents + h->plt.offset;
8821 if (htab->vxworks_p && info->shared)
8822 {
8823 unsigned int i;
8824 bfd_vma val;
8825
8826 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8827 {
8828 val = elf32_arm_vxworks_shared_plt_entry[i];
8829 if (i == 2)
8830 val |= got_address - sgot->output_section->vma;
8831 if (i == 5)
8832 val |= plt_index * RELOC_SIZE (htab);
8833 if (i == 2 || i == 5)
8834 bfd_put_32 (output_bfd, val, ptr);
8835 else
8836 put_arm_insn (htab, output_bfd, val, ptr);
8837 }
8838 }
8839 else if (htab->vxworks_p)
8840 {
8841 unsigned int i;
8842 bfd_vma val;
8843
8844 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
8845 {
8846 val = elf32_arm_vxworks_exec_plt_entry[i];
8847 if (i == 2)
8848 val |= got_address;
8849 if (i == 4)
8850 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
8851 if (i == 5)
8852 val |= plt_index * RELOC_SIZE (htab);
8853 if (i == 2 || i == 5)
8854 bfd_put_32 (output_bfd, val, ptr);
8855 else
8856 put_arm_insn (htab, output_bfd, val, ptr);
8857 }
8858
8859 loc = (htab->srelplt2->contents
8860 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
8861
8862 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
8863 referencing the GOT for this PLT entry. */
8864 rel.r_offset = plt_address + 8;
8865 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
8866 rel.r_addend = got_offset;
8867 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8868 loc += RELOC_SIZE (htab);
8869
8870 /* Create the R_ARM_ABS32 relocation referencing the
8871 beginning of the PLT for this GOT entry. */
8872 rel.r_offset = got_address;
8873 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
8874 rel.r_addend = 0;
8875 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8876 }
8877 else
8878 {
8879 bfd_signed_vma thumb_refs;
8880 /* Calculate the displacement between the PLT slot and the
8881 entry in the GOT. The eight-byte offset accounts for the
8882 value produced by adding to pc in the first instruction
8883 of the PLT stub. */
8884 got_displacement = got_address - (plt_address + 8);
8885
8886 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
8887
8888 thumb_refs = eh->plt_thumb_refcount;
8889 if (!htab->use_blx)
8890 thumb_refs += eh->plt_maybe_thumb_refcount;
8891
8892 if (thumb_refs > 0)
8893 {
8894 put_thumb_insn (htab, output_bfd,
8895 elf32_arm_plt_thumb_stub[0], ptr - 4);
8896 put_thumb_insn (htab, output_bfd,
8897 elf32_arm_plt_thumb_stub[1], ptr - 2);
8898 }
8899
8900 put_arm_insn (htab, output_bfd,
8901 elf32_arm_plt_entry[0]
8902 | ((got_displacement & 0x0ff00000) >> 20),
8903 ptr + 0);
8904 put_arm_insn (htab, output_bfd,
8905 elf32_arm_plt_entry[1]
8906 | ((got_displacement & 0x000ff000) >> 12),
8907 ptr+ 4);
8908 put_arm_insn (htab, output_bfd,
8909 elf32_arm_plt_entry[2]
8910 | (got_displacement & 0x00000fff),
8911 ptr + 8);
8912 #ifdef FOUR_WORD_PLT
8913 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
8914 #endif
8915 }
8916
8917 /* Fill in the entry in the global offset table. */
8918 bfd_put_32 (output_bfd,
8919 (splt->output_section->vma
8920 + splt->output_offset),
8921 sgot->contents + got_offset);
8922
8923 /* Fill in the entry in the .rel(a).plt section. */
8924 rel.r_addend = 0;
8925 rel.r_offset = got_address;
8926 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
8927 }
8928
8929 loc = srel->contents + plt_index * RELOC_SIZE (htab);
8930 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8931
8932 if (!h->def_regular)
8933 {
8934 /* Mark the symbol as undefined, rather than as defined in
8935 the .plt section. Leave the value alone. */
8936 sym->st_shndx = SHN_UNDEF;
8937 /* If the symbol is weak, we do need to clear the value.
8938 Otherwise, the PLT entry would provide a definition for
8939 the symbol even if the symbol wasn't defined anywhere,
8940 and so the symbol would never be NULL. */
8941 if (!h->ref_regular_nonweak)
8942 sym->st_value = 0;
8943 }
8944 }
8945
8946 if (h->got.offset != (bfd_vma) -1
8947 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
8948 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
8949 {
8950 asection * sgot;
8951 asection * srel;
8952 Elf_Internal_Rela rel;
8953 bfd_byte *loc;
8954 bfd_vma offset;
8955
8956 /* This symbol has an entry in the global offset table. Set it
8957 up. */
8958 sgot = bfd_get_section_by_name (dynobj, ".got");
8959 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
8960 BFD_ASSERT (sgot != NULL && srel != NULL);
8961
8962 offset = (h->got.offset & ~(bfd_vma) 1);
8963 rel.r_addend = 0;
8964 rel.r_offset = (sgot->output_section->vma
8965 + sgot->output_offset
8966 + offset);
8967
8968 /* If this is a static link, or it is a -Bsymbolic link and the
8969 symbol is defined locally or was forced to be local because
8970 of a version file, we just want to emit a RELATIVE reloc.
8971 The entry in the global offset table will already have been
8972 initialized in the relocate_section function. */
8973 if (info->shared
8974 && SYMBOL_REFERENCES_LOCAL (info, h))
8975 {
8976 BFD_ASSERT((h->got.offset & 1) != 0);
8977 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
8978 if (!htab->use_rel)
8979 {
8980 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
8981 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
8982 }
8983 }
8984 else
8985 {
8986 BFD_ASSERT((h->got.offset & 1) == 0);
8987 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
8988 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
8989 }
8990
8991 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
8992 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
8993 }
8994
8995 if (h->needs_copy)
8996 {
8997 asection * s;
8998 Elf_Internal_Rela rel;
8999 bfd_byte *loc;
9000
9001 /* This symbol needs a copy reloc. Set it up. */
9002 BFD_ASSERT (h->dynindx != -1
9003 && (h->root.type == bfd_link_hash_defined
9004 || h->root.type == bfd_link_hash_defweak));
9005
9006 s = bfd_get_section_by_name (h->root.u.def.section->owner,
9007 RELOC_SECTION (htab, ".bss"));
9008 BFD_ASSERT (s != NULL);
9009
9010 rel.r_addend = 0;
9011 rel.r_offset = (h->root.u.def.value
9012 + h->root.u.def.section->output_section->vma
9013 + h->root.u.def.section->output_offset);
9014 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
9015 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
9016 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
9017 }
9018
9019 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
9020 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
9021 to the ".got" section. */
9022 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
9023 || (!htab->vxworks_p && h == htab->root.hgot))
9024 sym->st_shndx = SHN_ABS;
9025
9026 return TRUE;
9027 }
9028
9029 /* Finish up the dynamic sections. */
9030
9031 static bfd_boolean
9032 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
9033 {
9034 bfd * dynobj;
9035 asection * sgot;
9036 asection * sdyn;
9037
9038 dynobj = elf_hash_table (info)->dynobj;
9039
9040 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
9041 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
9042 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
9043
9044 if (elf_hash_table (info)->dynamic_sections_created)
9045 {
9046 asection *splt;
9047 Elf32_External_Dyn *dyncon, *dynconend;
9048 struct elf32_arm_link_hash_table *htab;
9049
9050 htab = elf32_arm_hash_table (info);
9051 splt = bfd_get_section_by_name (dynobj, ".plt");
9052 BFD_ASSERT (splt != NULL && sdyn != NULL);
9053
9054 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9055 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9056
9057 for (; dyncon < dynconend; dyncon++)
9058 {
9059 Elf_Internal_Dyn dyn;
9060 const char * name;
9061 asection * s;
9062
9063 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9064
9065 switch (dyn.d_tag)
9066 {
9067 unsigned int type;
9068
9069 default:
9070 break;
9071
9072 case DT_HASH:
9073 name = ".hash";
9074 goto get_vma_if_bpabi;
9075 case DT_STRTAB:
9076 name = ".dynstr";
9077 goto get_vma_if_bpabi;
9078 case DT_SYMTAB:
9079 name = ".dynsym";
9080 goto get_vma_if_bpabi;
9081 case DT_VERSYM:
9082 name = ".gnu.version";
9083 goto get_vma_if_bpabi;
9084 case DT_VERDEF:
9085 name = ".gnu.version_d";
9086 goto get_vma_if_bpabi;
9087 case DT_VERNEED:
9088 name = ".gnu.version_r";
9089 goto get_vma_if_bpabi;
9090
9091 case DT_PLTGOT:
9092 name = ".got";
9093 goto get_vma;
9094 case DT_JMPREL:
9095 name = RELOC_SECTION (htab, ".plt");
9096 get_vma:
9097 s = bfd_get_section_by_name (output_bfd, name);
9098 BFD_ASSERT (s != NULL);
9099 if (!htab->symbian_p)
9100 dyn.d_un.d_ptr = s->vma;
9101 else
9102 /* In the BPABI, tags in the PT_DYNAMIC section point
9103 at the file offset, not the memory address, for the
9104 convenience of the post linker. */
9105 dyn.d_un.d_ptr = s->filepos;
9106 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9107 break;
9108
9109 get_vma_if_bpabi:
9110 if (htab->symbian_p)
9111 goto get_vma;
9112 break;
9113
9114 case DT_PLTRELSZ:
9115 s = bfd_get_section_by_name (output_bfd,
9116 RELOC_SECTION (htab, ".plt"));
9117 BFD_ASSERT (s != NULL);
9118 dyn.d_un.d_val = s->size;
9119 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9120 break;
9121
9122 case DT_RELSZ:
9123 case DT_RELASZ:
9124 if (!htab->symbian_p)
9125 {
9126 /* My reading of the SVR4 ABI indicates that the
9127 procedure linkage table relocs (DT_JMPREL) should be
9128 included in the overall relocs (DT_REL). This is
9129 what Solaris does. However, UnixWare can not handle
9130 that case. Therefore, we override the DT_RELSZ entry
9131 here to make it not include the JMPREL relocs. Since
9132 the linker script arranges for .rel(a).plt to follow all
9133 other relocation sections, we don't have to worry
9134 about changing the DT_REL entry. */
9135 s = bfd_get_section_by_name (output_bfd,
9136 RELOC_SECTION (htab, ".plt"));
9137 if (s != NULL)
9138 dyn.d_un.d_val -= s->size;
9139 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9140 break;
9141 }
9142 /* Fall through */
9143
9144 case DT_REL:
9145 case DT_RELA:
9146 /* In the BPABI, the DT_REL tag must point at the file
9147 offset, not the VMA, of the first relocation
9148 section. So, we use code similar to that in
9149 elflink.c, but do not check for SHF_ALLOC on the
9150 relcoation section, since relocations sections are
9151 never allocated under the BPABI. The comments above
9152 about Unixware notwithstanding, we include all of the
9153 relocations here. */
9154 if (htab->symbian_p)
9155 {
9156 unsigned int i;
9157 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
9158 ? SHT_REL : SHT_RELA);
9159 dyn.d_un.d_val = 0;
9160 for (i = 1; i < elf_numsections (output_bfd); i++)
9161 {
9162 Elf_Internal_Shdr *hdr
9163 = elf_elfsections (output_bfd)[i];
9164 if (hdr->sh_type == type)
9165 {
9166 if (dyn.d_tag == DT_RELSZ
9167 || dyn.d_tag == DT_RELASZ)
9168 dyn.d_un.d_val += hdr->sh_size;
9169 else if ((ufile_ptr) hdr->sh_offset
9170 <= dyn.d_un.d_val - 1)
9171 dyn.d_un.d_val = hdr->sh_offset;
9172 }
9173 }
9174 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9175 }
9176 break;
9177
9178 /* Set the bottom bit of DT_INIT/FINI if the
9179 corresponding function is Thumb. */
9180 case DT_INIT:
9181 name = info->init_function;
9182 goto get_sym;
9183 case DT_FINI:
9184 name = info->fini_function;
9185 get_sym:
9186 /* If it wasn't set by elf_bfd_final_link
9187 then there is nothing to adjust. */
9188 if (dyn.d_un.d_val != 0)
9189 {
9190 struct elf_link_hash_entry * eh;
9191
9192 eh = elf_link_hash_lookup (elf_hash_table (info), name,
9193 FALSE, FALSE, TRUE);
9194 if (eh != (struct elf_link_hash_entry *) NULL
9195 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
9196 {
9197 dyn.d_un.d_val |= 1;
9198 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9199 }
9200 }
9201 break;
9202 }
9203 }
9204
9205 /* Fill in the first entry in the procedure linkage table. */
9206 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
9207 {
9208 const bfd_vma *plt0_entry;
9209 bfd_vma got_address, plt_address, got_displacement;
9210
9211 /* Calculate the addresses of the GOT and PLT. */
9212 got_address = sgot->output_section->vma + sgot->output_offset;
9213 plt_address = splt->output_section->vma + splt->output_offset;
9214
9215 if (htab->vxworks_p)
9216 {
9217 /* The VxWorks GOT is relocated by the dynamic linker.
9218 Therefore, we must emit relocations rather than simply
9219 computing the values now. */
9220 Elf_Internal_Rela rel;
9221
9222 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
9223 put_arm_insn (htab, output_bfd, plt0_entry[0],
9224 splt->contents + 0);
9225 put_arm_insn (htab, output_bfd, plt0_entry[1],
9226 splt->contents + 4);
9227 put_arm_insn (htab, output_bfd, plt0_entry[2],
9228 splt->contents + 8);
9229 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
9230
9231 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
9232 rel.r_offset = plt_address + 12;
9233 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9234 rel.r_addend = 0;
9235 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
9236 htab->srelplt2->contents);
9237 }
9238 else
9239 {
9240 got_displacement = got_address - (plt_address + 16);
9241
9242 plt0_entry = elf32_arm_plt0_entry;
9243 put_arm_insn (htab, output_bfd, plt0_entry[0],
9244 splt->contents + 0);
9245 put_arm_insn (htab, output_bfd, plt0_entry[1],
9246 splt->contents + 4);
9247 put_arm_insn (htab, output_bfd, plt0_entry[2],
9248 splt->contents + 8);
9249 put_arm_insn (htab, output_bfd, plt0_entry[3],
9250 splt->contents + 12);
9251
9252 #ifdef FOUR_WORD_PLT
9253 /* The displacement value goes in the otherwise-unused
9254 last word of the second entry. */
9255 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
9256 #else
9257 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
9258 #endif
9259 }
9260 }
9261
9262 /* UnixWare sets the entsize of .plt to 4, although that doesn't
9263 really seem like the right value. */
9264 if (splt->output_section->owner == output_bfd)
9265 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
9266
9267 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
9268 {
9269 /* Correct the .rel(a).plt.unloaded relocations. They will have
9270 incorrect symbol indexes. */
9271 int num_plts;
9272 unsigned char *p;
9273
9274 num_plts = ((htab->splt->size - htab->plt_header_size)
9275 / htab->plt_entry_size);
9276 p = htab->srelplt2->contents + RELOC_SIZE (htab);
9277
9278 for (; num_plts; num_plts--)
9279 {
9280 Elf_Internal_Rela rel;
9281
9282 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9283 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
9284 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9285 p += RELOC_SIZE (htab);
9286
9287 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
9288 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
9289 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
9290 p += RELOC_SIZE (htab);
9291 }
9292 }
9293 }
9294
9295 /* Fill in the first three entries in the global offset table. */
9296 if (sgot)
9297 {
9298 if (sgot->size > 0)
9299 {
9300 if (sdyn == NULL)
9301 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
9302 else
9303 bfd_put_32 (output_bfd,
9304 sdyn->output_section->vma + sdyn->output_offset,
9305 sgot->contents);
9306 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
9307 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
9308 }
9309
9310 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
9311 }
9312
9313 return TRUE;
9314 }
9315
9316 static void
9317 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9318 {
9319 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9320 struct elf32_arm_link_hash_table *globals;
9321
9322 i_ehdrp = elf_elfheader (abfd);
9323
9324 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
9325 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
9326 else
9327 i_ehdrp->e_ident[EI_OSABI] = 0;
9328 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
9329
9330 if (link_info)
9331 {
9332 globals = elf32_arm_hash_table (link_info);
9333 if (globals->byteswap_code)
9334 i_ehdrp->e_flags |= EF_ARM_BE8;
9335 }
9336 }
9337
9338 static enum elf_reloc_type_class
9339 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
9340 {
9341 switch ((int) ELF32_R_TYPE (rela->r_info))
9342 {
9343 case R_ARM_RELATIVE:
9344 return reloc_class_relative;
9345 case R_ARM_JUMP_SLOT:
9346 return reloc_class_plt;
9347 case R_ARM_COPY:
9348 return reloc_class_copy;
9349 default:
9350 return reloc_class_normal;
9351 }
9352 }
9353
9354 /* Set the right machine number for an Arm ELF file. */
9355
9356 static bfd_boolean
9357 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
9358 {
9359 if (hdr->sh_type == SHT_NOTE)
9360 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
9361
9362 return TRUE;
9363 }
9364
9365 static void
9366 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
9367 {
9368 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
9369 }
9370
9371 /* Return TRUE if this is an unwinding table entry. */
9372
9373 static bfd_boolean
9374 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
9375 {
9376 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
9377 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
9378 }
9379
9380
9381 /* Set the type and flags for an ARM section. We do this by
9382 the section name, which is a hack, but ought to work. */
9383
9384 static bfd_boolean
9385 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
9386 {
9387 const char * name;
9388
9389 name = bfd_get_section_name (abfd, sec);
9390
9391 if (is_arm_elf_unwind_section_name (abfd, name))
9392 {
9393 hdr->sh_type = SHT_ARM_EXIDX;
9394 hdr->sh_flags |= SHF_LINK_ORDER;
9395 }
9396 return TRUE;
9397 }
9398
9399 /* Handle an ARM specific section when reading an object file. This is
9400 called when bfd_section_from_shdr finds a section with an unknown
9401 type. */
9402
9403 static bfd_boolean
9404 elf32_arm_section_from_shdr (bfd *abfd,
9405 Elf_Internal_Shdr * hdr,
9406 const char *name,
9407 int shindex)
9408 {
9409 /* There ought to be a place to keep ELF backend specific flags, but
9410 at the moment there isn't one. We just keep track of the
9411 sections by their name, instead. Fortunately, the ABI gives
9412 names for all the ARM specific sections, so we will probably get
9413 away with this. */
9414 switch (hdr->sh_type)
9415 {
9416 case SHT_ARM_EXIDX:
9417 case SHT_ARM_PREEMPTMAP:
9418 case SHT_ARM_ATTRIBUTES:
9419 break;
9420
9421 default:
9422 return FALSE;
9423 }
9424
9425 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
9426 return FALSE;
9427
9428 return TRUE;
9429 }
9430
9431 /* A structure used to record a list of sections, independently
9432 of the next and prev fields in the asection structure. */
9433 typedef struct section_list
9434 {
9435 asection * sec;
9436 struct section_list * next;
9437 struct section_list * prev;
9438 }
9439 section_list;
9440
9441 /* Unfortunately we need to keep a list of sections for which
9442 an _arm_elf_section_data structure has been allocated. This
9443 is because it is possible for functions like elf32_arm_write_section
9444 to be called on a section which has had an elf_data_structure
9445 allocated for it (and so the used_by_bfd field is valid) but
9446 for which the ARM extended version of this structure - the
9447 _arm_elf_section_data structure - has not been allocated. */
9448 static section_list * sections_with_arm_elf_section_data = NULL;
9449
9450 static void
9451 record_section_with_arm_elf_section_data (asection * sec)
9452 {
9453 struct section_list * entry;
9454
9455 entry = bfd_malloc (sizeof (* entry));
9456 if (entry == NULL)
9457 return;
9458 entry->sec = sec;
9459 entry->next = sections_with_arm_elf_section_data;
9460 entry->prev = NULL;
9461 if (entry->next != NULL)
9462 entry->next->prev = entry;
9463 sections_with_arm_elf_section_data = entry;
9464 }
9465
9466 static struct section_list *
9467 find_arm_elf_section_entry (asection * sec)
9468 {
9469 struct section_list * entry;
9470 static struct section_list * last_entry = NULL;
9471
9472 /* This is a short cut for the typical case where the sections are added
9473 to the sections_with_arm_elf_section_data list in forward order and
9474 then looked up here in backwards order. This makes a real difference
9475 to the ld-srec/sec64k.exp linker test. */
9476 entry = sections_with_arm_elf_section_data;
9477 if (last_entry != NULL)
9478 {
9479 if (last_entry->sec == sec)
9480 entry = last_entry;
9481 else if (last_entry->next != NULL
9482 && last_entry->next->sec == sec)
9483 entry = last_entry->next;
9484 }
9485
9486 for (; entry; entry = entry->next)
9487 if (entry->sec == sec)
9488 break;
9489
9490 if (entry)
9491 /* Record the entry prior to this one - it is the entry we are most
9492 likely to want to locate next time. Also this way if we have been
9493 called from unrecord_section_with_arm_elf_section_data() we will not
9494 be caching a pointer that is about to be freed. */
9495 last_entry = entry->prev;
9496
9497 return entry;
9498 }
9499
9500 static _arm_elf_section_data *
9501 get_arm_elf_section_data (asection * sec)
9502 {
9503 struct section_list * entry;
9504
9505 entry = find_arm_elf_section_entry (sec);
9506
9507 if (entry)
9508 return elf32_arm_section_data (entry->sec);
9509 else
9510 return NULL;
9511 }
9512
9513 static void
9514 unrecord_section_with_arm_elf_section_data (asection * sec)
9515 {
9516 struct section_list * entry;
9517
9518 entry = find_arm_elf_section_entry (sec);
9519
9520 if (entry)
9521 {
9522 if (entry->prev != NULL)
9523 entry->prev->next = entry->next;
9524 if (entry->next != NULL)
9525 entry->next->prev = entry->prev;
9526 if (entry == sections_with_arm_elf_section_data)
9527 sections_with_arm_elf_section_data = entry->next;
9528 free (entry);
9529 }
9530 }
9531
9532
9533 typedef struct
9534 {
9535 void *finfo;
9536 struct bfd_link_info *info;
9537 asection *sec;
9538 int sec_shndx;
9539 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
9540 asection *, struct elf_link_hash_entry *);
9541 } output_arch_syminfo;
9542
9543 enum map_symbol_type
9544 {
9545 ARM_MAP_ARM,
9546 ARM_MAP_THUMB,
9547 ARM_MAP_DATA
9548 };
9549
9550
9551 /* Output a single PLT mapping symbol. */
9552
9553 static bfd_boolean
9554 elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi,
9555 enum map_symbol_type type,
9556 bfd_vma offset)
9557 {
9558 static const char *names[3] = {"$a", "$t", "$d"};
9559 struct elf32_arm_link_hash_table *htab;
9560 Elf_Internal_Sym sym;
9561
9562 htab = elf32_arm_hash_table (osi->info);
9563 sym.st_value = osi->sec->output_section->vma
9564 + osi->sec->output_offset
9565 + offset;
9566 sym.st_size = 0;
9567 sym.st_other = 0;
9568 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
9569 sym.st_shndx = osi->sec_shndx;
9570 if (!osi->func (osi->finfo, names[type], &sym, osi->sec, NULL))
9571 return FALSE;
9572 return TRUE;
9573 }
9574
9575
9576 /* Output mapping symbols for PLT entries associated with H. */
9577
9578 static bfd_boolean
9579 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
9580 {
9581 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
9582 struct elf32_arm_link_hash_table *htab;
9583 struct elf32_arm_link_hash_entry *eh;
9584 bfd_vma addr;
9585
9586 htab = elf32_arm_hash_table (osi->info);
9587
9588 if (h->root.type == bfd_link_hash_indirect)
9589 return TRUE;
9590
9591 if (h->root.type == bfd_link_hash_warning)
9592 /* When warning symbols are created, they **replace** the "real"
9593 entry in the hash table, thus we never get to see the real
9594 symbol in a hash traversal. So look at it now. */
9595 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9596
9597 if (h->plt.offset == (bfd_vma) -1)
9598 return TRUE;
9599
9600 eh = (struct elf32_arm_link_hash_entry *) h;
9601 addr = h->plt.offset;
9602 if (htab->symbian_p)
9603 {
9604 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9605 return FALSE;
9606 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4))
9607 return FALSE;
9608 }
9609 else if (htab->vxworks_p)
9610 {
9611 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9612 return FALSE;
9613 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8))
9614 return FALSE;
9615 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12))
9616 return FALSE;
9617 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20))
9618 return FALSE;
9619 }
9620 else
9621 {
9622 bfd_signed_vma thumb_refs;
9623
9624 thumb_refs = eh->plt_thumb_refcount;
9625 if (!htab->use_blx)
9626 thumb_refs += eh->plt_maybe_thumb_refcount;
9627
9628 if (thumb_refs > 0)
9629 {
9630 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4))
9631 return FALSE;
9632 }
9633 #ifdef FOUR_WORD_PLT
9634 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9635 return FALSE;
9636 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12))
9637 return FALSE;
9638 #else
9639 /* A three-word PLT with no Thumb thunk contains only Arm code,
9640 so only need to output a mapping symbol for the first PLT entry and
9641 entries with thumb thunks. */
9642 if (thumb_refs > 0 || addr == 20)
9643 {
9644 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
9645 return FALSE;
9646 }
9647 #endif
9648 }
9649
9650 return TRUE;
9651 }
9652
9653
9654 /* Output mapping symbols for linker generated sections. */
9655
9656 static bfd_boolean
9657 elf32_arm_output_arch_local_syms (bfd *output_bfd,
9658 struct bfd_link_info *info,
9659 void *finfo, bfd_boolean (*func) (void *, const char *,
9660 Elf_Internal_Sym *,
9661 asection *,
9662 struct elf_link_hash_entry *))
9663 {
9664 output_arch_syminfo osi;
9665 struct elf32_arm_link_hash_table *htab;
9666 bfd_vma offset;
9667 bfd_size_type size;
9668
9669 htab = elf32_arm_hash_table (info);
9670 check_use_blx(htab);
9671
9672 osi.finfo = finfo;
9673 osi.info = info;
9674 osi.func = func;
9675
9676 /* ARM->Thumb glue. */
9677 if (htab->arm_glue_size > 0)
9678 {
9679 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
9680 ARM2THUMB_GLUE_SECTION_NAME);
9681
9682 osi.sec_shndx = _bfd_elf_section_from_bfd_section
9683 (output_bfd, osi.sec->output_section);
9684 if (info->shared || htab->root.is_relocatable_executable
9685 || htab->pic_veneer)
9686 size = ARM2THUMB_PIC_GLUE_SIZE;
9687 else if (htab->use_blx)
9688 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
9689 else
9690 size = ARM2THUMB_STATIC_GLUE_SIZE;
9691
9692 for (offset = 0; offset < htab->arm_glue_size; offset += size)
9693 {
9694 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, offset);
9695 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
9696 }
9697 }
9698
9699 /* Thumb->ARM glue. */
9700 if (htab->thumb_glue_size > 0)
9701 {
9702 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
9703 THUMB2ARM_GLUE_SECTION_NAME);
9704
9705 osi.sec_shndx = _bfd_elf_section_from_bfd_section
9706 (output_bfd, osi.sec->output_section);
9707 size = THUMB2ARM_GLUE_SIZE;
9708
9709 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
9710 {
9711 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_THUMB, offset);
9712 elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, offset + 4);
9713 }
9714 }
9715
9716 /* Finally, output mapping symbols for the PLT. */
9717 if (!htab->splt || htab->splt->size == 0)
9718 return TRUE;
9719
9720 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
9721 htab->splt->output_section);
9722 osi.sec = htab->splt;
9723 /* Output mapping symbols for the plt header. SymbianOS does not have a
9724 plt header. */
9725 if (htab->vxworks_p)
9726 {
9727 /* VxWorks shared libraries have no PLT header. */
9728 if (!info->shared)
9729 {
9730 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9731 return FALSE;
9732 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12))
9733 return FALSE;
9734 }
9735 }
9736 else if (!htab->symbian_p)
9737 {
9738 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
9739 return FALSE;
9740 #ifndef FOUR_WORD_PLT
9741 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16))
9742 return FALSE;
9743 #endif
9744 }
9745
9746 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
9747 return TRUE;
9748 }
9749
9750 /* Allocate target specific section data. */
9751
9752 static bfd_boolean
9753 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
9754 {
9755 if (!sec->used_by_bfd)
9756 {
9757 _arm_elf_section_data *sdata;
9758 bfd_size_type amt = sizeof (*sdata);
9759
9760 sdata = bfd_zalloc (abfd, amt);
9761 if (sdata == NULL)
9762 return FALSE;
9763 sec->used_by_bfd = sdata;
9764 }
9765
9766 record_section_with_arm_elf_section_data (sec);
9767
9768 return _bfd_elf_new_section_hook (abfd, sec);
9769 }
9770
9771
9772 /* Used to order a list of mapping symbols by address. */
9773
9774 static int
9775 elf32_arm_compare_mapping (const void * a, const void * b)
9776 {
9777 return ((const elf32_arm_section_map *) a)->vma
9778 > ((const elf32_arm_section_map *) b)->vma;
9779 }
9780
9781
9782 /* Do code byteswapping. Return FALSE afterwards so that the section is
9783 written out as normal. */
9784
9785 static bfd_boolean
9786 elf32_arm_write_section (bfd *output_bfd,
9787 struct bfd_link_info *link_info, asection *sec,
9788 bfd_byte *contents)
9789 {
9790 int mapcount, errcount;
9791 _arm_elf_section_data *arm_data;
9792 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
9793 elf32_arm_section_map *map;
9794 elf32_vfp11_erratum_list *errnode;
9795 bfd_vma ptr;
9796 bfd_vma end;
9797 bfd_vma offset = sec->output_section->vma + sec->output_offset;
9798 bfd_byte tmp;
9799 int i;
9800
9801 /* If this section has not been allocated an _arm_elf_section_data
9802 structure then we cannot record anything. */
9803 arm_data = get_arm_elf_section_data (sec);
9804 if (arm_data == NULL)
9805 return FALSE;
9806
9807 mapcount = arm_data->mapcount;
9808 map = arm_data->map;
9809 errcount = arm_data->erratumcount;
9810
9811 if (errcount != 0)
9812 {
9813 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
9814
9815 for (errnode = arm_data->erratumlist; errnode != 0;
9816 errnode = errnode->next)
9817 {
9818 bfd_vma index = errnode->vma - offset;
9819
9820 switch (errnode->type)
9821 {
9822 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
9823 {
9824 bfd_vma branch_to_veneer;
9825 /* Original condition code of instruction, plus bit mask for
9826 ARM B instruction. */
9827 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
9828 | 0x0a000000;
9829
9830 /* The instruction is before the label. */
9831 index -= 4;
9832
9833 /* Above offset included in -4 below. */
9834 branch_to_veneer = errnode->u.b.veneer->vma
9835 - errnode->vma - 4;
9836
9837 if ((signed) branch_to_veneer < -(1 << 25)
9838 || (signed) branch_to_veneer >= (1 << 25))
9839 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
9840 "range"), output_bfd);
9841
9842 insn |= (branch_to_veneer >> 2) & 0xffffff;
9843 contents[endianflip ^ index] = insn & 0xff;
9844 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
9845 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
9846 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
9847 }
9848 break;
9849
9850 case VFP11_ERRATUM_ARM_VENEER:
9851 {
9852 bfd_vma branch_from_veneer;
9853 unsigned int insn;
9854
9855 /* Take size of veneer into account. */
9856 branch_from_veneer = errnode->u.v.branch->vma
9857 - errnode->vma - 12;
9858
9859 if ((signed) branch_from_veneer < -(1 << 25)
9860 || (signed) branch_from_veneer >= (1 << 25))
9861 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
9862 "range"), output_bfd);
9863
9864 /* Original instruction. */
9865 insn = errnode->u.v.branch->u.b.vfp_insn;
9866 contents[endianflip ^ index] = insn & 0xff;
9867 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
9868 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
9869 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
9870
9871 /* Branch back to insn after original insn. */
9872 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
9873 contents[endianflip ^ (index + 4)] = insn & 0xff;
9874 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
9875 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
9876 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
9877 }
9878 break;
9879
9880 default:
9881 abort ();
9882 }
9883 }
9884 }
9885
9886 if (mapcount == 0)
9887 return FALSE;
9888
9889 if (globals->byteswap_code)
9890 {
9891 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
9892
9893 ptr = map[0].vma;
9894 for (i = 0; i < mapcount; i++)
9895 {
9896 if (i == mapcount - 1)
9897 end = sec->size;
9898 else
9899 end = map[i + 1].vma;
9900
9901 switch (map[i].type)
9902 {
9903 case 'a':
9904 /* Byte swap code words. */
9905 while (ptr + 3 < end)
9906 {
9907 tmp = contents[ptr];
9908 contents[ptr] = contents[ptr + 3];
9909 contents[ptr + 3] = tmp;
9910 tmp = contents[ptr + 1];
9911 contents[ptr + 1] = contents[ptr + 2];
9912 contents[ptr + 2] = tmp;
9913 ptr += 4;
9914 }
9915 break;
9916
9917 case 't':
9918 /* Byte swap code halfwords. */
9919 while (ptr + 1 < end)
9920 {
9921 tmp = contents[ptr];
9922 contents[ptr] = contents[ptr + 1];
9923 contents[ptr + 1] = tmp;
9924 ptr += 2;
9925 }
9926 break;
9927
9928 case 'd':
9929 /* Leave data alone. */
9930 break;
9931 }
9932 ptr = end;
9933 }
9934 }
9935
9936 free (map);
9937 arm_data->mapcount = 0;
9938 arm_data->mapsize = 0;
9939 arm_data->map = NULL;
9940 unrecord_section_with_arm_elf_section_data (sec);
9941
9942 return FALSE;
9943 }
9944
9945 static void
9946 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
9947 asection * sec,
9948 void * ignore ATTRIBUTE_UNUSED)
9949 {
9950 unrecord_section_with_arm_elf_section_data (sec);
9951 }
9952
9953 static bfd_boolean
9954 elf32_arm_close_and_cleanup (bfd * abfd)
9955 {
9956 if (abfd->sections)
9957 bfd_map_over_sections (abfd,
9958 unrecord_section_via_map_over_sections,
9959 NULL);
9960
9961 return _bfd_elf_close_and_cleanup (abfd);
9962 }
9963
9964 static bfd_boolean
9965 elf32_arm_bfd_free_cached_info (bfd * abfd)
9966 {
9967 if (abfd->sections)
9968 bfd_map_over_sections (abfd,
9969 unrecord_section_via_map_over_sections,
9970 NULL);
9971
9972 return _bfd_free_cached_info (abfd);
9973 }
9974
9975 /* Display STT_ARM_TFUNC symbols as functions. */
9976
9977 static void
9978 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
9979 asymbol *asym)
9980 {
9981 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
9982
9983 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
9984 elfsym->symbol.flags |= BSF_FUNCTION;
9985 }
9986
9987
9988 /* Mangle thumb function symbols as we read them in. */
9989
9990 static bfd_boolean
9991 elf32_arm_swap_symbol_in (bfd * abfd,
9992 const void *psrc,
9993 const void *pshn,
9994 Elf_Internal_Sym *dst)
9995 {
9996 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
9997 return FALSE;
9998
9999 /* New EABI objects mark thumb function symbols by setting the low bit of
10000 the address. Turn these into STT_ARM_TFUNC. */
10001 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
10002 && (dst->st_value & 1))
10003 {
10004 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
10005 dst->st_value &= ~(bfd_vma) 1;
10006 }
10007 return TRUE;
10008 }
10009
10010
10011 /* Mangle thumb function symbols as we write them out. */
10012
10013 static void
10014 elf32_arm_swap_symbol_out (bfd *abfd,
10015 const Elf_Internal_Sym *src,
10016 void *cdst,
10017 void *shndx)
10018 {
10019 Elf_Internal_Sym newsym;
10020
10021 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
10022 of the address set, as per the new EABI. We do this unconditionally
10023 because objcopy does not set the elf header flags until after
10024 it writes out the symbol table. */
10025 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
10026 {
10027 newsym = *src;
10028 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
10029 if (newsym.st_shndx != SHN_UNDEF)
10030 {
10031 /* Do this only for defined symbols. At link type, the static
10032 linker will simulate the work of dynamic linker of resolving
10033 symbols and will carry over the thumbness of found symbols to
10034 the output symbol table. It's not clear how it happens, but
10035 the thumbness of undefined symbols can well be different at
10036 runtime, and writing '1' for them will be confusing for users
10037 and possibly for dynamic linker itself.
10038 */
10039 newsym.st_value |= 1;
10040 }
10041
10042 src = &newsym;
10043 }
10044 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
10045 }
10046
10047 /* Add the PT_ARM_EXIDX program header. */
10048
10049 static bfd_boolean
10050 elf32_arm_modify_segment_map (bfd *abfd,
10051 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10052 {
10053 struct elf_segment_map *m;
10054 asection *sec;
10055
10056 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10057 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10058 {
10059 /* If there is already a PT_ARM_EXIDX header, then we do not
10060 want to add another one. This situation arises when running
10061 "strip"; the input binary already has the header. */
10062 m = elf_tdata (abfd)->segment_map;
10063 while (m && m->p_type != PT_ARM_EXIDX)
10064 m = m->next;
10065 if (!m)
10066 {
10067 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
10068 if (m == NULL)
10069 return FALSE;
10070 m->p_type = PT_ARM_EXIDX;
10071 m->count = 1;
10072 m->sections[0] = sec;
10073
10074 m->next = elf_tdata (abfd)->segment_map;
10075 elf_tdata (abfd)->segment_map = m;
10076 }
10077 }
10078
10079 return TRUE;
10080 }
10081
10082 /* We may add a PT_ARM_EXIDX program header. */
10083
10084 static int
10085 elf32_arm_additional_program_headers (bfd *abfd,
10086 struct bfd_link_info *info ATTRIBUTE_UNUSED)
10087 {
10088 asection *sec;
10089
10090 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
10091 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
10092 return 1;
10093 else
10094 return 0;
10095 }
10096
10097 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
10098 static bfd_boolean
10099 elf32_arm_is_function_type (unsigned int type)
10100 {
10101 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
10102 }
10103
10104 /* We use this to override swap_symbol_in and swap_symbol_out. */
10105 const struct elf_size_info elf32_arm_size_info = {
10106 sizeof (Elf32_External_Ehdr),
10107 sizeof (Elf32_External_Phdr),
10108 sizeof (Elf32_External_Shdr),
10109 sizeof (Elf32_External_Rel),
10110 sizeof (Elf32_External_Rela),
10111 sizeof (Elf32_External_Sym),
10112 sizeof (Elf32_External_Dyn),
10113 sizeof (Elf_External_Note),
10114 4,
10115 1,
10116 32, 2,
10117 ELFCLASS32, EV_CURRENT,
10118 bfd_elf32_write_out_phdrs,
10119 bfd_elf32_write_shdrs_and_ehdr,
10120 bfd_elf32_checksum_contents,
10121 bfd_elf32_write_relocs,
10122 elf32_arm_swap_symbol_in,
10123 elf32_arm_swap_symbol_out,
10124 bfd_elf32_slurp_reloc_table,
10125 bfd_elf32_slurp_symbol_table,
10126 bfd_elf32_swap_dyn_in,
10127 bfd_elf32_swap_dyn_out,
10128 bfd_elf32_swap_reloc_in,
10129 bfd_elf32_swap_reloc_out,
10130 bfd_elf32_swap_reloca_in,
10131 bfd_elf32_swap_reloca_out
10132 };
10133
10134 #define ELF_ARCH bfd_arch_arm
10135 #define ELF_MACHINE_CODE EM_ARM
10136 #ifdef __QNXTARGET__
10137 #define ELF_MAXPAGESIZE 0x1000
10138 #else
10139 #define ELF_MAXPAGESIZE 0x8000
10140 #endif
10141 #define ELF_MINPAGESIZE 0x1000
10142 #define ELF_COMMONPAGESIZE 0x1000
10143
10144 #define bfd_elf32_mkobject elf32_arm_mkobject
10145
10146 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
10147 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
10148 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
10149 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
10150 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
10151 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
10152 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
10153 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
10154 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
10155 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
10156 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
10157 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
10158 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
10159
10160 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
10161 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
10162 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
10163 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
10164 #define elf_backend_check_relocs elf32_arm_check_relocs
10165 #define elf_backend_relocate_section elf32_arm_relocate_section
10166 #define elf_backend_write_section elf32_arm_write_section
10167 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
10168 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
10169 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
10170 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
10171 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
10172 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
10173 #define elf_backend_post_process_headers elf32_arm_post_process_headers
10174 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
10175 #define elf_backend_object_p elf32_arm_object_p
10176 #define elf_backend_section_flags elf32_arm_section_flags
10177 #define elf_backend_fake_sections elf32_arm_fake_sections
10178 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
10179 #define elf_backend_final_write_processing elf32_arm_final_write_processing
10180 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
10181 #define elf_backend_symbol_processing elf32_arm_symbol_processing
10182 #define elf_backend_size_info elf32_arm_size_info
10183 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
10184 #define elf_backend_additional_program_headers \
10185 elf32_arm_additional_program_headers
10186 #define elf_backend_output_arch_local_syms \
10187 elf32_arm_output_arch_local_syms
10188 #define elf_backend_begin_write_processing \
10189 elf32_arm_begin_write_processing
10190 #define elf_backend_is_function_type elf32_arm_is_function_type
10191
10192 #define elf_backend_can_refcount 1
10193 #define elf_backend_can_gc_sections 1
10194 #define elf_backend_plt_readonly 1
10195 #define elf_backend_want_got_plt 1
10196 #define elf_backend_want_plt_sym 0
10197 #define elf_backend_may_use_rel_p 1
10198 #define elf_backend_may_use_rela_p 0
10199 #define elf_backend_default_use_rela_p 0
10200
10201 #define elf_backend_got_header_size 12
10202
10203 #undef elf_backend_obj_attrs_vendor
10204 #define elf_backend_obj_attrs_vendor "aeabi"
10205 #undef elf_backend_obj_attrs_section
10206 #define elf_backend_obj_attrs_section ".ARM.attributes"
10207 #undef elf_backend_obj_attrs_arg_type
10208 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
10209 #undef elf_backend_obj_attrs_section_type
10210 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
10211
10212 #include "elf32-target.h"
10213
10214 /* VxWorks Targets */
10215
10216 #undef TARGET_LITTLE_SYM
10217 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
10218 #undef TARGET_LITTLE_NAME
10219 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
10220 #undef TARGET_BIG_SYM
10221 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
10222 #undef TARGET_BIG_NAME
10223 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
10224
10225 /* Like elf32_arm_link_hash_table_create -- but overrides
10226 appropriately for VxWorks. */
10227 static struct bfd_link_hash_table *
10228 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
10229 {
10230 struct bfd_link_hash_table *ret;
10231
10232 ret = elf32_arm_link_hash_table_create (abfd);
10233 if (ret)
10234 {
10235 struct elf32_arm_link_hash_table *htab
10236 = (struct elf32_arm_link_hash_table *) ret;
10237 htab->use_rel = 0;
10238 htab->vxworks_p = 1;
10239 }
10240 return ret;
10241 }
10242
10243 static void
10244 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10245 {
10246 elf32_arm_final_write_processing (abfd, linker);
10247 elf_vxworks_final_write_processing (abfd, linker);
10248 }
10249
10250 #undef elf32_bed
10251 #define elf32_bed elf32_arm_vxworks_bed
10252
10253 #undef bfd_elf32_bfd_link_hash_table_create
10254 #define bfd_elf32_bfd_link_hash_table_create \
10255 elf32_arm_vxworks_link_hash_table_create
10256 #undef elf_backend_add_symbol_hook
10257 #define elf_backend_add_symbol_hook \
10258 elf_vxworks_add_symbol_hook
10259 #undef elf_backend_final_write_processing
10260 #define elf_backend_final_write_processing \
10261 elf32_arm_vxworks_final_write_processing
10262 #undef elf_backend_emit_relocs
10263 #define elf_backend_emit_relocs \
10264 elf_vxworks_emit_relocs
10265
10266 #undef elf_backend_may_use_rel_p
10267 #define elf_backend_may_use_rel_p 0
10268 #undef elf_backend_may_use_rela_p
10269 #define elf_backend_may_use_rela_p 1
10270 #undef elf_backend_default_use_rela_p
10271 #define elf_backend_default_use_rela_p 1
10272 #undef elf_backend_want_plt_sym
10273 #define elf_backend_want_plt_sym 1
10274 #undef ELF_MAXPAGESIZE
10275 #define ELF_MAXPAGESIZE 0x1000
10276
10277 #include "elf32-target.h"
10278
10279
10280 /* Symbian OS Targets */
10281
10282 #undef TARGET_LITTLE_SYM
10283 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
10284 #undef TARGET_LITTLE_NAME
10285 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
10286 #undef TARGET_BIG_SYM
10287 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
10288 #undef TARGET_BIG_NAME
10289 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
10290
10291 /* Like elf32_arm_link_hash_table_create -- but overrides
10292 appropriately for Symbian OS. */
10293 static struct bfd_link_hash_table *
10294 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
10295 {
10296 struct bfd_link_hash_table *ret;
10297
10298 ret = elf32_arm_link_hash_table_create (abfd);
10299 if (ret)
10300 {
10301 struct elf32_arm_link_hash_table *htab
10302 = (struct elf32_arm_link_hash_table *)ret;
10303 /* There is no PLT header for Symbian OS. */
10304 htab->plt_header_size = 0;
10305 /* The PLT entries are each three instructions. */
10306 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
10307 htab->symbian_p = 1;
10308 /* Symbian uses armv5t or above, so use_blx is always true. */
10309 htab->use_blx = 1;
10310 htab->root.is_relocatable_executable = 1;
10311 }
10312 return ret;
10313 }
10314
10315 static const struct bfd_elf_special_section
10316 elf32_arm_symbian_special_sections[] =
10317 {
10318 /* In a BPABI executable, the dynamic linking sections do not go in
10319 the loadable read-only segment. The post-linker may wish to
10320 refer to these sections, but they are not part of the final
10321 program image. */
10322 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
10323 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
10324 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
10325 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
10326 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
10327 /* These sections do not need to be writable as the SymbianOS
10328 postlinker will arrange things so that no dynamic relocation is
10329 required. */
10330 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
10331 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
10332 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
10333 { NULL, 0, 0, 0, 0 }
10334 };
10335
10336 static void
10337 elf32_arm_symbian_begin_write_processing (bfd *abfd,
10338 struct bfd_link_info *link_info)
10339 {
10340 /* BPABI objects are never loaded directly by an OS kernel; they are
10341 processed by a postlinker first, into an OS-specific format. If
10342 the D_PAGED bit is set on the file, BFD will align segments on
10343 page boundaries, so that an OS can directly map the file. With
10344 BPABI objects, that just results in wasted space. In addition,
10345 because we clear the D_PAGED bit, map_sections_to_segments will
10346 recognize that the program headers should not be mapped into any
10347 loadable segment. */
10348 abfd->flags &= ~D_PAGED;
10349 elf32_arm_begin_write_processing(abfd, link_info);
10350 }
10351
10352 static bfd_boolean
10353 elf32_arm_symbian_modify_segment_map (bfd *abfd,
10354 struct bfd_link_info *info)
10355 {
10356 struct elf_segment_map *m;
10357 asection *dynsec;
10358
10359 /* BPABI shared libraries and executables should have a PT_DYNAMIC
10360 segment. However, because the .dynamic section is not marked
10361 with SEC_LOAD, the generic ELF code will not create such a
10362 segment. */
10363 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
10364 if (dynsec)
10365 {
10366 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
10367 if (m->p_type == PT_DYNAMIC)
10368 break;
10369
10370 if (m == NULL)
10371 {
10372 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
10373 m->next = elf_tdata (abfd)->segment_map;
10374 elf_tdata (abfd)->segment_map = m;
10375 }
10376 }
10377
10378 /* Also call the generic arm routine. */
10379 return elf32_arm_modify_segment_map (abfd, info);
10380 }
10381
10382 #undef elf32_bed
10383 #define elf32_bed elf32_arm_symbian_bed
10384
10385 /* The dynamic sections are not allocated on SymbianOS; the postlinker
10386 will process them and then discard them. */
10387 #undef ELF_DYNAMIC_SEC_FLAGS
10388 #define ELF_DYNAMIC_SEC_FLAGS \
10389 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
10390
10391 #undef bfd_elf32_bfd_link_hash_table_create
10392 #define bfd_elf32_bfd_link_hash_table_create \
10393 elf32_arm_symbian_link_hash_table_create
10394 #undef elf_backend_add_symbol_hook
10395
10396 #undef elf_backend_special_sections
10397 #define elf_backend_special_sections elf32_arm_symbian_special_sections
10398
10399 #undef elf_backend_begin_write_processing
10400 #define elf_backend_begin_write_processing \
10401 elf32_arm_symbian_begin_write_processing
10402 #undef elf_backend_final_write_processing
10403 #define elf_backend_final_write_processing \
10404 elf32_arm_final_write_processing
10405 #undef elf_backend_emit_relocs
10406
10407 #undef elf_backend_modify_segment_map
10408 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
10409
10410 /* There is no .got section for BPABI objects, and hence no header. */
10411 #undef elf_backend_got_header_size
10412 #define elf_backend_got_header_size 0
10413
10414 /* Similarly, there is no .got.plt section. */
10415 #undef elf_backend_want_got_plt
10416 #define elf_backend_want_got_plt 0
10417
10418 #undef elf_backend_may_use_rel_p
10419 #define elf_backend_may_use_rel_p 1
10420 #undef elf_backend_may_use_rela_p
10421 #define elf_backend_may_use_rela_p 0
10422 #undef elf_backend_default_use_rela_p
10423 #define elf_backend_default_use_rela_p 0
10424 #undef elf_backend_want_plt_sym
10425 #define elf_backend_want_plt_sym 0
10426 #undef ELF_MAXPAGESIZE
10427 #define ELF_MAXPAGESIZE 0x8000
10428
10429 #include "elf32-target.h"
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