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GDBARCH interface for process record and replay.
[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
3 2008 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libiberty.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf-vxworks.h"
28 #include "elf/arm.h"
29
30 /* Return the relocation section associated with NAME. HTAB is the
31 bfd's elf32_arm_link_hash_entry. */
32 #define RELOC_SECTION(HTAB, NAME) \
33 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
34
35 /* Return size of a relocation entry. HTAB is the bfd's
36 elf32_arm_link_hash_entry. */
37 #define RELOC_SIZE(HTAB) \
38 ((HTAB)->use_rel \
39 ? sizeof (Elf32_External_Rel) \
40 : sizeof (Elf32_External_Rela))
41
42 /* Return function to swap relocations in. HTAB is the bfd's
43 elf32_arm_link_hash_entry. */
44 #define SWAP_RELOC_IN(HTAB) \
45 ((HTAB)->use_rel \
46 ? bfd_elf32_swap_reloc_in \
47 : bfd_elf32_swap_reloca_in)
48
49 /* Return function to swap relocations out. HTAB is the bfd's
50 elf32_arm_link_hash_entry. */
51 #define SWAP_RELOC_OUT(HTAB) \
52 ((HTAB)->use_rel \
53 ? bfd_elf32_swap_reloc_out \
54 : bfd_elf32_swap_reloca_out)
55
56 #define elf_info_to_howto 0
57 #define elf_info_to_howto_rel elf32_arm_info_to_howto
58
59 #define ARM_ELF_ABI_VERSION 0
60 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
61
62 static struct elf_backend_data elf32_arm_vxworks_bed;
63
64 static bfd_boolean elf32_arm_write_section (bfd *output_bfd,
65 struct bfd_link_info *link_info,
66 asection *sec,
67 bfd_byte *contents);
68
69 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
70 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
71 in that slot. */
72
73 static reloc_howto_type elf32_arm_howto_table_1[] =
74 {
75 /* No relocation. */
76 HOWTO (R_ARM_NONE, /* type */
77 0, /* rightshift */
78 0, /* size (0 = byte, 1 = short, 2 = long) */
79 0, /* bitsize */
80 FALSE, /* pc_relative */
81 0, /* bitpos */
82 complain_overflow_dont,/* complain_on_overflow */
83 bfd_elf_generic_reloc, /* special_function */
84 "R_ARM_NONE", /* name */
85 FALSE, /* partial_inplace */
86 0, /* src_mask */
87 0, /* dst_mask */
88 FALSE), /* pcrel_offset */
89
90 HOWTO (R_ARM_PC24, /* type */
91 2, /* rightshift */
92 2, /* size (0 = byte, 1 = short, 2 = long) */
93 24, /* bitsize */
94 TRUE, /* pc_relative */
95 0, /* bitpos */
96 complain_overflow_signed,/* complain_on_overflow */
97 bfd_elf_generic_reloc, /* special_function */
98 "R_ARM_PC24", /* name */
99 FALSE, /* partial_inplace */
100 0x00ffffff, /* src_mask */
101 0x00ffffff, /* dst_mask */
102 TRUE), /* pcrel_offset */
103
104 /* 32 bit absolute */
105 HOWTO (R_ARM_ABS32, /* type */
106 0, /* rightshift */
107 2, /* size (0 = byte, 1 = short, 2 = long) */
108 32, /* bitsize */
109 FALSE, /* pc_relative */
110 0, /* bitpos */
111 complain_overflow_bitfield,/* complain_on_overflow */
112 bfd_elf_generic_reloc, /* special_function */
113 "R_ARM_ABS32", /* name */
114 FALSE, /* partial_inplace */
115 0xffffffff, /* src_mask */
116 0xffffffff, /* dst_mask */
117 FALSE), /* pcrel_offset */
118
119 /* standard 32bit pc-relative reloc */
120 HOWTO (R_ARM_REL32, /* type */
121 0, /* rightshift */
122 2, /* size (0 = byte, 1 = short, 2 = long) */
123 32, /* bitsize */
124 TRUE, /* pc_relative */
125 0, /* bitpos */
126 complain_overflow_bitfield,/* complain_on_overflow */
127 bfd_elf_generic_reloc, /* special_function */
128 "R_ARM_REL32", /* name */
129 FALSE, /* partial_inplace */
130 0xffffffff, /* src_mask */
131 0xffffffff, /* dst_mask */
132 TRUE), /* pcrel_offset */
133
134 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
135 HOWTO (R_ARM_LDR_PC_G0, /* type */
136 0, /* rightshift */
137 0, /* size (0 = byte, 1 = short, 2 = long) */
138 32, /* bitsize */
139 TRUE, /* pc_relative */
140 0, /* bitpos */
141 complain_overflow_dont,/* complain_on_overflow */
142 bfd_elf_generic_reloc, /* special_function */
143 "R_ARM_LDR_PC_G0", /* name */
144 FALSE, /* partial_inplace */
145 0xffffffff, /* src_mask */
146 0xffffffff, /* dst_mask */
147 TRUE), /* pcrel_offset */
148
149 /* 16 bit absolute */
150 HOWTO (R_ARM_ABS16, /* type */
151 0, /* rightshift */
152 1, /* size (0 = byte, 1 = short, 2 = long) */
153 16, /* bitsize */
154 FALSE, /* pc_relative */
155 0, /* bitpos */
156 complain_overflow_bitfield,/* complain_on_overflow */
157 bfd_elf_generic_reloc, /* special_function */
158 "R_ARM_ABS16", /* name */
159 FALSE, /* partial_inplace */
160 0x0000ffff, /* src_mask */
161 0x0000ffff, /* dst_mask */
162 FALSE), /* pcrel_offset */
163
164 /* 12 bit absolute */
165 HOWTO (R_ARM_ABS12, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 12, /* bitsize */
169 FALSE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield,/* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_ARM_ABS12", /* name */
174 FALSE, /* partial_inplace */
175 0x00000fff, /* src_mask */
176 0x00000fff, /* dst_mask */
177 FALSE), /* pcrel_offset */
178
179 HOWTO (R_ARM_THM_ABS5, /* type */
180 6, /* rightshift */
181 1, /* size (0 = byte, 1 = short, 2 = long) */
182 5, /* bitsize */
183 FALSE, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield,/* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_ARM_THM_ABS5", /* name */
188 FALSE, /* partial_inplace */
189 0x000007e0, /* src_mask */
190 0x000007e0, /* dst_mask */
191 FALSE), /* pcrel_offset */
192
193 /* 8 bit absolute */
194 HOWTO (R_ARM_ABS8, /* type */
195 0, /* rightshift */
196 0, /* size (0 = byte, 1 = short, 2 = long) */
197 8, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield,/* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_ARM_ABS8", /* name */
203 FALSE, /* partial_inplace */
204 0x000000ff, /* src_mask */
205 0x000000ff, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 HOWTO (R_ARM_SBREL32, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont,/* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_ARM_SBREL32", /* name */
217 FALSE, /* partial_inplace */
218 0xffffffff, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 HOWTO (R_ARM_THM_CALL, /* type */
223 1, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 25, /* bitsize */
226 TRUE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_signed,/* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_ARM_THM_CALL", /* name */
231 FALSE, /* partial_inplace */
232 0x07ff07ff, /* src_mask */
233 0x07ff07ff, /* dst_mask */
234 TRUE), /* pcrel_offset */
235
236 HOWTO (R_ARM_THM_PC8, /* type */
237 1, /* rightshift */
238 1, /* size (0 = byte, 1 = short, 2 = long) */
239 8, /* bitsize */
240 TRUE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_signed,/* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_ARM_THM_PC8", /* name */
245 FALSE, /* partial_inplace */
246 0x000000ff, /* src_mask */
247 0x000000ff, /* dst_mask */
248 TRUE), /* pcrel_offset */
249
250 HOWTO (R_ARM_BREL_ADJ, /* type */
251 1, /* rightshift */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
253 32, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_signed,/* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_ARM_BREL_ADJ", /* name */
259 FALSE, /* partial_inplace */
260 0xffffffff, /* src_mask */
261 0xffffffff, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 HOWTO (R_ARM_SWI24, /* type */
265 0, /* rightshift */
266 0, /* size (0 = byte, 1 = short, 2 = long) */
267 0, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_signed,/* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_ARM_SWI24", /* name */
273 FALSE, /* partial_inplace */
274 0x00000000, /* src_mask */
275 0x00000000, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 HOWTO (R_ARM_THM_SWI8, /* type */
279 0, /* rightshift */
280 0, /* size (0 = byte, 1 = short, 2 = long) */
281 0, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_signed,/* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_ARM_SWI8", /* name */
287 FALSE, /* partial_inplace */
288 0x00000000, /* src_mask */
289 0x00000000, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* BLX instruction for the ARM. */
293 HOWTO (R_ARM_XPC25, /* type */
294 2, /* rightshift */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
296 25, /* bitsize */
297 TRUE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_signed,/* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_ARM_XPC25", /* name */
302 FALSE, /* partial_inplace */
303 0x00ffffff, /* src_mask */
304 0x00ffffff, /* dst_mask */
305 TRUE), /* pcrel_offset */
306
307 /* BLX instruction for the Thumb. */
308 HOWTO (R_ARM_THM_XPC22, /* type */
309 2, /* rightshift */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
311 22, /* bitsize */
312 TRUE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_signed,/* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_ARM_THM_XPC22", /* name */
317 FALSE, /* partial_inplace */
318 0x07ff07ff, /* src_mask */
319 0x07ff07ff, /* dst_mask */
320 TRUE), /* pcrel_offset */
321
322 /* Dynamic TLS relocations. */
323
324 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
325 0, /* rightshift */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
327 32, /* bitsize */
328 FALSE, /* pc_relative */
329 0, /* bitpos */
330 complain_overflow_bitfield,/* complain_on_overflow */
331 bfd_elf_generic_reloc, /* special_function */
332 "R_ARM_TLS_DTPMOD32", /* name */
333 TRUE, /* partial_inplace */
334 0xffffffff, /* src_mask */
335 0xffffffff, /* dst_mask */
336 FALSE), /* pcrel_offset */
337
338 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
339 0, /* rightshift */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
341 32, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield,/* complain_on_overflow */
345 bfd_elf_generic_reloc, /* special_function */
346 "R_ARM_TLS_DTPOFF32", /* name */
347 TRUE, /* partial_inplace */
348 0xffffffff, /* src_mask */
349 0xffffffff, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 HOWTO (R_ARM_TLS_TPOFF32, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 32, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_bitfield,/* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_ARM_TLS_TPOFF32", /* name */
361 TRUE, /* partial_inplace */
362 0xffffffff, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 /* Relocs used in ARM Linux */
367
368 HOWTO (R_ARM_COPY, /* type */
369 0, /* rightshift */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
371 32, /* bitsize */
372 FALSE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_bitfield,/* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_ARM_COPY", /* name */
377 TRUE, /* partial_inplace */
378 0xffffffff, /* src_mask */
379 0xffffffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
381
382 HOWTO (R_ARM_GLOB_DAT, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 32, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_bitfield,/* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_ARM_GLOB_DAT", /* name */
391 TRUE, /* partial_inplace */
392 0xffffffff, /* src_mask */
393 0xffffffff, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 HOWTO (R_ARM_JUMP_SLOT, /* type */
397 0, /* rightshift */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
399 32, /* bitsize */
400 FALSE, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_bitfield,/* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_ARM_JUMP_SLOT", /* name */
405 TRUE, /* partial_inplace */
406 0xffffffff, /* src_mask */
407 0xffffffff, /* dst_mask */
408 FALSE), /* pcrel_offset */
409
410 HOWTO (R_ARM_RELATIVE, /* type */
411 0, /* rightshift */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
413 32, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_bitfield,/* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_ARM_RELATIVE", /* name */
419 TRUE, /* partial_inplace */
420 0xffffffff, /* src_mask */
421 0xffffffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 HOWTO (R_ARM_GOTOFF32, /* type */
425 0, /* rightshift */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
427 32, /* bitsize */
428 FALSE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_bitfield,/* complain_on_overflow */
431 bfd_elf_generic_reloc, /* special_function */
432 "R_ARM_GOTOFF32", /* name */
433 TRUE, /* partial_inplace */
434 0xffffffff, /* src_mask */
435 0xffffffff, /* dst_mask */
436 FALSE), /* pcrel_offset */
437
438 HOWTO (R_ARM_GOTPC, /* type */
439 0, /* rightshift */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
441 32, /* bitsize */
442 TRUE, /* pc_relative */
443 0, /* bitpos */
444 complain_overflow_bitfield,/* complain_on_overflow */
445 bfd_elf_generic_reloc, /* special_function */
446 "R_ARM_GOTPC", /* name */
447 TRUE, /* partial_inplace */
448 0xffffffff, /* src_mask */
449 0xffffffff, /* dst_mask */
450 TRUE), /* pcrel_offset */
451
452 HOWTO (R_ARM_GOT32, /* type */
453 0, /* rightshift */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
455 32, /* bitsize */
456 FALSE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_bitfield,/* complain_on_overflow */
459 bfd_elf_generic_reloc, /* special_function */
460 "R_ARM_GOT32", /* name */
461 TRUE, /* partial_inplace */
462 0xffffffff, /* src_mask */
463 0xffffffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
465
466 HOWTO (R_ARM_PLT32, /* type */
467 2, /* rightshift */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
469 24, /* bitsize */
470 TRUE, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_bitfield,/* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 "R_ARM_PLT32", /* name */
475 FALSE, /* partial_inplace */
476 0x00ffffff, /* src_mask */
477 0x00ffffff, /* dst_mask */
478 TRUE), /* pcrel_offset */
479
480 HOWTO (R_ARM_CALL, /* type */
481 2, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 24, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed,/* complain_on_overflow */
487 bfd_elf_generic_reloc, /* special_function */
488 "R_ARM_CALL", /* name */
489 FALSE, /* partial_inplace */
490 0x00ffffff, /* src_mask */
491 0x00ffffff, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 HOWTO (R_ARM_JUMP24, /* type */
495 2, /* rightshift */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
497 24, /* bitsize */
498 TRUE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_signed,/* complain_on_overflow */
501 bfd_elf_generic_reloc, /* special_function */
502 "R_ARM_JUMP24", /* name */
503 FALSE, /* partial_inplace */
504 0x00ffffff, /* src_mask */
505 0x00ffffff, /* dst_mask */
506 TRUE), /* pcrel_offset */
507
508 HOWTO (R_ARM_THM_JUMP24, /* type */
509 1, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 24, /* bitsize */
512 TRUE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_signed,/* complain_on_overflow */
515 bfd_elf_generic_reloc, /* special_function */
516 "R_ARM_THM_JUMP24", /* name */
517 FALSE, /* partial_inplace */
518 0x07ff2fff, /* src_mask */
519 0x07ff2fff, /* dst_mask */
520 TRUE), /* pcrel_offset */
521
522 HOWTO (R_ARM_BASE_ABS, /* type */
523 0, /* rightshift */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
525 32, /* bitsize */
526 FALSE, /* pc_relative */
527 0, /* bitpos */
528 complain_overflow_dont,/* complain_on_overflow */
529 bfd_elf_generic_reloc, /* special_function */
530 "R_ARM_BASE_ABS", /* name */
531 FALSE, /* partial_inplace */
532 0xffffffff, /* src_mask */
533 0xffffffff, /* dst_mask */
534 FALSE), /* pcrel_offset */
535
536 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
537 0, /* rightshift */
538 2, /* size (0 = byte, 1 = short, 2 = long) */
539 12, /* bitsize */
540 TRUE, /* pc_relative */
541 0, /* bitpos */
542 complain_overflow_dont,/* complain_on_overflow */
543 bfd_elf_generic_reloc, /* special_function */
544 "R_ARM_ALU_PCREL_7_0", /* name */
545 FALSE, /* partial_inplace */
546 0x00000fff, /* src_mask */
547 0x00000fff, /* dst_mask */
548 TRUE), /* pcrel_offset */
549
550 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 12, /* bitsize */
554 TRUE, /* pc_relative */
555 8, /* bitpos */
556 complain_overflow_dont,/* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_ARM_ALU_PCREL_15_8",/* name */
559 FALSE, /* partial_inplace */
560 0x00000fff, /* src_mask */
561 0x00000fff, /* dst_mask */
562 TRUE), /* pcrel_offset */
563
564 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
565 0, /* rightshift */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
567 12, /* bitsize */
568 TRUE, /* pc_relative */
569 16, /* bitpos */
570 complain_overflow_dont,/* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 "R_ARM_ALU_PCREL_23_15",/* name */
573 FALSE, /* partial_inplace */
574 0x00000fff, /* src_mask */
575 0x00000fff, /* dst_mask */
576 TRUE), /* pcrel_offset */
577
578 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 12, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont,/* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_ARM_LDR_SBREL_11_0",/* name */
587 FALSE, /* partial_inplace */
588 0x00000fff, /* src_mask */
589 0x00000fff, /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
593 0, /* rightshift */
594 2, /* size (0 = byte, 1 = short, 2 = long) */
595 8, /* bitsize */
596 FALSE, /* pc_relative */
597 12, /* bitpos */
598 complain_overflow_dont,/* complain_on_overflow */
599 bfd_elf_generic_reloc, /* special_function */
600 "R_ARM_ALU_SBREL_19_12",/* name */
601 FALSE, /* partial_inplace */
602 0x000ff000, /* src_mask */
603 0x000ff000, /* dst_mask */
604 FALSE), /* pcrel_offset */
605
606 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 8, /* bitsize */
610 FALSE, /* pc_relative */
611 20, /* bitpos */
612 complain_overflow_dont,/* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_ARM_ALU_SBREL_27_20",/* name */
615 FALSE, /* partial_inplace */
616 0x0ff00000, /* src_mask */
617 0x0ff00000, /* dst_mask */
618 FALSE), /* pcrel_offset */
619
620 HOWTO (R_ARM_TARGET1, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 FALSE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_dont,/* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_ARM_TARGET1", /* name */
629 FALSE, /* partial_inplace */
630 0xffffffff, /* src_mask */
631 0xffffffff, /* dst_mask */
632 FALSE), /* pcrel_offset */
633
634 HOWTO (R_ARM_ROSEGREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont,/* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_ARM_ROSEGREL32", /* name */
643 FALSE, /* partial_inplace */
644 0xffffffff, /* src_mask */
645 0xffffffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 HOWTO (R_ARM_V4BX, /* type */
649 0, /* rightshift */
650 2, /* size (0 = byte, 1 = short, 2 = long) */
651 32, /* bitsize */
652 FALSE, /* pc_relative */
653 0, /* bitpos */
654 complain_overflow_dont,/* complain_on_overflow */
655 bfd_elf_generic_reloc, /* special_function */
656 "R_ARM_V4BX", /* name */
657 FALSE, /* partial_inplace */
658 0xffffffff, /* src_mask */
659 0xffffffff, /* dst_mask */
660 FALSE), /* pcrel_offset */
661
662 HOWTO (R_ARM_TARGET2, /* type */
663 0, /* rightshift */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
665 32, /* bitsize */
666 FALSE, /* pc_relative */
667 0, /* bitpos */
668 complain_overflow_signed,/* complain_on_overflow */
669 bfd_elf_generic_reloc, /* special_function */
670 "R_ARM_TARGET2", /* name */
671 FALSE, /* partial_inplace */
672 0xffffffff, /* src_mask */
673 0xffffffff, /* dst_mask */
674 TRUE), /* pcrel_offset */
675
676 HOWTO (R_ARM_PREL31, /* type */
677 0, /* rightshift */
678 2, /* size (0 = byte, 1 = short, 2 = long) */
679 31, /* bitsize */
680 TRUE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_signed,/* complain_on_overflow */
683 bfd_elf_generic_reloc, /* special_function */
684 "R_ARM_PREL31", /* name */
685 FALSE, /* partial_inplace */
686 0x7fffffff, /* src_mask */
687 0x7fffffff, /* dst_mask */
688 TRUE), /* pcrel_offset */
689
690 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
691 0, /* rightshift */
692 2, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_dont,/* complain_on_overflow */
697 bfd_elf_generic_reloc, /* special_function */
698 "R_ARM_MOVW_ABS_NC", /* name */
699 FALSE, /* partial_inplace */
700 0x000f0fff, /* src_mask */
701 0x000f0fff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 HOWTO (R_ARM_MOVT_ABS, /* type */
705 0, /* rightshift */
706 2, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_bitfield,/* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_ARM_MOVT_ABS", /* name */
713 FALSE, /* partial_inplace */
714 0x000f0fff, /* src_mask */
715 0x000f0fff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
719 0, /* rightshift */
720 2, /* size (0 = byte, 1 = short, 2 = long) */
721 16, /* bitsize */
722 TRUE, /* pc_relative */
723 0, /* bitpos */
724 complain_overflow_dont,/* complain_on_overflow */
725 bfd_elf_generic_reloc, /* special_function */
726 "R_ARM_MOVW_PREL_NC", /* name */
727 FALSE, /* partial_inplace */
728 0x000f0fff, /* src_mask */
729 0x000f0fff, /* dst_mask */
730 TRUE), /* pcrel_offset */
731
732 HOWTO (R_ARM_MOVT_PREL, /* type */
733 0, /* rightshift */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
735 16, /* bitsize */
736 TRUE, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_bitfield,/* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_ARM_MOVT_PREL", /* name */
741 FALSE, /* partial_inplace */
742 0x000f0fff, /* src_mask */
743 0x000f0fff, /* dst_mask */
744 TRUE), /* pcrel_offset */
745
746 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
747 0, /* rightshift */
748 2, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_dont,/* complain_on_overflow */
753 bfd_elf_generic_reloc, /* special_function */
754 "R_ARM_THM_MOVW_ABS_NC",/* name */
755 FALSE, /* partial_inplace */
756 0x040f70ff, /* src_mask */
757 0x040f70ff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
761 0, /* rightshift */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
763 16, /* bitsize */
764 FALSE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_bitfield,/* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_ARM_THM_MOVT_ABS", /* name */
769 FALSE, /* partial_inplace */
770 0x040f70ff, /* src_mask */
771 0x040f70ff, /* dst_mask */
772 FALSE), /* pcrel_offset */
773
774 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 16, /* bitsize */
778 TRUE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont,/* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_ARM_THM_MOVW_PREL_NC",/* name */
783 FALSE, /* partial_inplace */
784 0x040f70ff, /* src_mask */
785 0x040f70ff, /* dst_mask */
786 TRUE), /* pcrel_offset */
787
788 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 16, /* bitsize */
792 TRUE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_bitfield,/* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_ARM_THM_MOVT_PREL", /* name */
797 FALSE, /* partial_inplace */
798 0x040f70ff, /* src_mask */
799 0x040f70ff, /* dst_mask */
800 TRUE), /* pcrel_offset */
801
802 HOWTO (R_ARM_THM_JUMP19, /* type */
803 1, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 19, /* bitsize */
806 TRUE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_signed,/* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_ARM_THM_JUMP19", /* name */
811 FALSE, /* partial_inplace */
812 0x043f2fff, /* src_mask */
813 0x043f2fff, /* dst_mask */
814 TRUE), /* pcrel_offset */
815
816 HOWTO (R_ARM_THM_JUMP6, /* type */
817 1, /* rightshift */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
819 6, /* bitsize */
820 TRUE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_unsigned,/* complain_on_overflow */
823 bfd_elf_generic_reloc, /* special_function */
824 "R_ARM_THM_JUMP6", /* name */
825 FALSE, /* partial_inplace */
826 0x02f8, /* src_mask */
827 0x02f8, /* dst_mask */
828 TRUE), /* pcrel_offset */
829
830 /* These are declared as 13-bit signed relocations because we can
831 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
832 versa. */
833 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
834 0, /* rightshift */
835 2, /* size (0 = byte, 1 = short, 2 = long) */
836 13, /* bitsize */
837 TRUE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_dont,/* complain_on_overflow */
840 bfd_elf_generic_reloc, /* special_function */
841 "R_ARM_THM_ALU_PREL_11_0",/* name */
842 FALSE, /* partial_inplace */
843 0xffffffff, /* src_mask */
844 0xffffffff, /* dst_mask */
845 TRUE), /* pcrel_offset */
846
847 HOWTO (R_ARM_THM_PC12, /* type */
848 0, /* rightshift */
849 2, /* size (0 = byte, 1 = short, 2 = long) */
850 13, /* bitsize */
851 TRUE, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont,/* complain_on_overflow */
854 bfd_elf_generic_reloc, /* special_function */
855 "R_ARM_THM_PC12", /* name */
856 FALSE, /* partial_inplace */
857 0xffffffff, /* src_mask */
858 0xffffffff, /* dst_mask */
859 TRUE), /* pcrel_offset */
860
861 HOWTO (R_ARM_ABS32_NOI, /* type */
862 0, /* rightshift */
863 2, /* size (0 = byte, 1 = short, 2 = long) */
864 32, /* bitsize */
865 FALSE, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_dont,/* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_ARM_ABS32_NOI", /* name */
870 FALSE, /* partial_inplace */
871 0xffffffff, /* src_mask */
872 0xffffffff, /* dst_mask */
873 FALSE), /* pcrel_offset */
874
875 HOWTO (R_ARM_REL32_NOI, /* type */
876 0, /* rightshift */
877 2, /* size (0 = byte, 1 = short, 2 = long) */
878 32, /* bitsize */
879 TRUE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_dont,/* complain_on_overflow */
882 bfd_elf_generic_reloc, /* special_function */
883 "R_ARM_REL32_NOI", /* name */
884 FALSE, /* partial_inplace */
885 0xffffffff, /* src_mask */
886 0xffffffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Group relocations. */
890
891 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
892 0, /* rightshift */
893 2, /* size (0 = byte, 1 = short, 2 = long) */
894 32, /* bitsize */
895 TRUE, /* pc_relative */
896 0, /* bitpos */
897 complain_overflow_dont,/* complain_on_overflow */
898 bfd_elf_generic_reloc, /* special_function */
899 "R_ARM_ALU_PC_G0_NC", /* name */
900 FALSE, /* partial_inplace */
901 0xffffffff, /* src_mask */
902 0xffffffff, /* dst_mask */
903 TRUE), /* pcrel_offset */
904
905 HOWTO (R_ARM_ALU_PC_G0, /* type */
906 0, /* rightshift */
907 2, /* size (0 = byte, 1 = short, 2 = long) */
908 32, /* bitsize */
909 TRUE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont,/* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_ARM_ALU_PC_G0", /* name */
914 FALSE, /* partial_inplace */
915 0xffffffff, /* src_mask */
916 0xffffffff, /* dst_mask */
917 TRUE), /* pcrel_offset */
918
919 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
920 0, /* rightshift */
921 2, /* size (0 = byte, 1 = short, 2 = long) */
922 32, /* bitsize */
923 TRUE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont,/* complain_on_overflow */
926 bfd_elf_generic_reloc, /* special_function */
927 "R_ARM_ALU_PC_G1_NC", /* name */
928 FALSE, /* partial_inplace */
929 0xffffffff, /* src_mask */
930 0xffffffff, /* dst_mask */
931 TRUE), /* pcrel_offset */
932
933 HOWTO (R_ARM_ALU_PC_G1, /* type */
934 0, /* rightshift */
935 2, /* size (0 = byte, 1 = short, 2 = long) */
936 32, /* bitsize */
937 TRUE, /* pc_relative */
938 0, /* bitpos */
939 complain_overflow_dont,/* complain_on_overflow */
940 bfd_elf_generic_reloc, /* special_function */
941 "R_ARM_ALU_PC_G1", /* name */
942 FALSE, /* partial_inplace */
943 0xffffffff, /* src_mask */
944 0xffffffff, /* dst_mask */
945 TRUE), /* pcrel_offset */
946
947 HOWTO (R_ARM_ALU_PC_G2, /* type */
948 0, /* rightshift */
949 2, /* size (0 = byte, 1 = short, 2 = long) */
950 32, /* bitsize */
951 TRUE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont,/* complain_on_overflow */
954 bfd_elf_generic_reloc, /* special_function */
955 "R_ARM_ALU_PC_G2", /* name */
956 FALSE, /* partial_inplace */
957 0xffffffff, /* src_mask */
958 0xffffffff, /* dst_mask */
959 TRUE), /* pcrel_offset */
960
961 HOWTO (R_ARM_LDR_PC_G1, /* type */
962 0, /* rightshift */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
964 32, /* bitsize */
965 TRUE, /* pc_relative */
966 0, /* bitpos */
967 complain_overflow_dont,/* complain_on_overflow */
968 bfd_elf_generic_reloc, /* special_function */
969 "R_ARM_LDR_PC_G1", /* name */
970 FALSE, /* partial_inplace */
971 0xffffffff, /* src_mask */
972 0xffffffff, /* dst_mask */
973 TRUE), /* pcrel_offset */
974
975 HOWTO (R_ARM_LDR_PC_G2, /* type */
976 0, /* rightshift */
977 2, /* size (0 = byte, 1 = short, 2 = long) */
978 32, /* bitsize */
979 TRUE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_dont,/* complain_on_overflow */
982 bfd_elf_generic_reloc, /* special_function */
983 "R_ARM_LDR_PC_G2", /* name */
984 FALSE, /* partial_inplace */
985 0xffffffff, /* src_mask */
986 0xffffffff, /* dst_mask */
987 TRUE), /* pcrel_offset */
988
989 HOWTO (R_ARM_LDRS_PC_G0, /* type */
990 0, /* rightshift */
991 2, /* size (0 = byte, 1 = short, 2 = long) */
992 32, /* bitsize */
993 TRUE, /* pc_relative */
994 0, /* bitpos */
995 complain_overflow_dont,/* complain_on_overflow */
996 bfd_elf_generic_reloc, /* special_function */
997 "R_ARM_LDRS_PC_G0", /* name */
998 FALSE, /* partial_inplace */
999 0xffffffff, /* src_mask */
1000 0xffffffff, /* dst_mask */
1001 TRUE), /* pcrel_offset */
1002
1003 HOWTO (R_ARM_LDRS_PC_G1, /* type */
1004 0, /* rightshift */
1005 2, /* size (0 = byte, 1 = short, 2 = long) */
1006 32, /* bitsize */
1007 TRUE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont,/* complain_on_overflow */
1010 bfd_elf_generic_reloc, /* special_function */
1011 "R_ARM_LDRS_PC_G1", /* name */
1012 FALSE, /* partial_inplace */
1013 0xffffffff, /* src_mask */
1014 0xffffffff, /* dst_mask */
1015 TRUE), /* pcrel_offset */
1016
1017 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1018 0, /* rightshift */
1019 2, /* size (0 = byte, 1 = short, 2 = long) */
1020 32, /* bitsize */
1021 TRUE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_dont,/* complain_on_overflow */
1024 bfd_elf_generic_reloc, /* special_function */
1025 "R_ARM_LDRS_PC_G2", /* name */
1026 FALSE, /* partial_inplace */
1027 0xffffffff, /* src_mask */
1028 0xffffffff, /* dst_mask */
1029 TRUE), /* pcrel_offset */
1030
1031 HOWTO (R_ARM_LDC_PC_G0, /* type */
1032 0, /* rightshift */
1033 2, /* size (0 = byte, 1 = short, 2 = long) */
1034 32, /* bitsize */
1035 TRUE, /* pc_relative */
1036 0, /* bitpos */
1037 complain_overflow_dont,/* complain_on_overflow */
1038 bfd_elf_generic_reloc, /* special_function */
1039 "R_ARM_LDC_PC_G0", /* name */
1040 FALSE, /* partial_inplace */
1041 0xffffffff, /* src_mask */
1042 0xffffffff, /* dst_mask */
1043 TRUE), /* pcrel_offset */
1044
1045 HOWTO (R_ARM_LDC_PC_G1, /* type */
1046 0, /* rightshift */
1047 2, /* size (0 = byte, 1 = short, 2 = long) */
1048 32, /* bitsize */
1049 TRUE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_dont,/* complain_on_overflow */
1052 bfd_elf_generic_reloc, /* special_function */
1053 "R_ARM_LDC_PC_G1", /* name */
1054 FALSE, /* partial_inplace */
1055 0xffffffff, /* src_mask */
1056 0xffffffff, /* dst_mask */
1057 TRUE), /* pcrel_offset */
1058
1059 HOWTO (R_ARM_LDC_PC_G2, /* type */
1060 0, /* rightshift */
1061 2, /* size (0 = byte, 1 = short, 2 = long) */
1062 32, /* bitsize */
1063 TRUE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_dont,/* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_ARM_LDC_PC_G2", /* name */
1068 FALSE, /* partial_inplace */
1069 0xffffffff, /* src_mask */
1070 0xffffffff, /* dst_mask */
1071 TRUE), /* pcrel_offset */
1072
1073 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1074 0, /* rightshift */
1075 2, /* size (0 = byte, 1 = short, 2 = long) */
1076 32, /* bitsize */
1077 TRUE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont,/* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_ARM_ALU_SB_G0_NC", /* name */
1082 FALSE, /* partial_inplace */
1083 0xffffffff, /* src_mask */
1084 0xffffffff, /* dst_mask */
1085 TRUE), /* pcrel_offset */
1086
1087 HOWTO (R_ARM_ALU_SB_G0, /* type */
1088 0, /* rightshift */
1089 2, /* size (0 = byte, 1 = short, 2 = long) */
1090 32, /* bitsize */
1091 TRUE, /* pc_relative */
1092 0, /* bitpos */
1093 complain_overflow_dont,/* complain_on_overflow */
1094 bfd_elf_generic_reloc, /* special_function */
1095 "R_ARM_ALU_SB_G0", /* name */
1096 FALSE, /* partial_inplace */
1097 0xffffffff, /* src_mask */
1098 0xffffffff, /* dst_mask */
1099 TRUE), /* pcrel_offset */
1100
1101 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1102 0, /* rightshift */
1103 2, /* size (0 = byte, 1 = short, 2 = long) */
1104 32, /* bitsize */
1105 TRUE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_dont,/* complain_on_overflow */
1108 bfd_elf_generic_reloc, /* special_function */
1109 "R_ARM_ALU_SB_G1_NC", /* name */
1110 FALSE, /* partial_inplace */
1111 0xffffffff, /* src_mask */
1112 0xffffffff, /* dst_mask */
1113 TRUE), /* pcrel_offset */
1114
1115 HOWTO (R_ARM_ALU_SB_G1, /* type */
1116 0, /* rightshift */
1117 2, /* size (0 = byte, 1 = short, 2 = long) */
1118 32, /* bitsize */
1119 TRUE, /* pc_relative */
1120 0, /* bitpos */
1121 complain_overflow_dont,/* complain_on_overflow */
1122 bfd_elf_generic_reloc, /* special_function */
1123 "R_ARM_ALU_SB_G1", /* name */
1124 FALSE, /* partial_inplace */
1125 0xffffffff, /* src_mask */
1126 0xffffffff, /* dst_mask */
1127 TRUE), /* pcrel_offset */
1128
1129 HOWTO (R_ARM_ALU_SB_G2, /* type */
1130 0, /* rightshift */
1131 2, /* size (0 = byte, 1 = short, 2 = long) */
1132 32, /* bitsize */
1133 TRUE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont,/* complain_on_overflow */
1136 bfd_elf_generic_reloc, /* special_function */
1137 "R_ARM_ALU_SB_G2", /* name */
1138 FALSE, /* partial_inplace */
1139 0xffffffff, /* src_mask */
1140 0xffffffff, /* dst_mask */
1141 TRUE), /* pcrel_offset */
1142
1143 HOWTO (R_ARM_LDR_SB_G0, /* type */
1144 0, /* rightshift */
1145 2, /* size (0 = byte, 1 = short, 2 = long) */
1146 32, /* bitsize */
1147 TRUE, /* pc_relative */
1148 0, /* bitpos */
1149 complain_overflow_dont,/* complain_on_overflow */
1150 bfd_elf_generic_reloc, /* special_function */
1151 "R_ARM_LDR_SB_G0", /* name */
1152 FALSE, /* partial_inplace */
1153 0xffffffff, /* src_mask */
1154 0xffffffff, /* dst_mask */
1155 TRUE), /* pcrel_offset */
1156
1157 HOWTO (R_ARM_LDR_SB_G1, /* type */
1158 0, /* rightshift */
1159 2, /* size (0 = byte, 1 = short, 2 = long) */
1160 32, /* bitsize */
1161 TRUE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_dont,/* complain_on_overflow */
1164 bfd_elf_generic_reloc, /* special_function */
1165 "R_ARM_LDR_SB_G1", /* name */
1166 FALSE, /* partial_inplace */
1167 0xffffffff, /* src_mask */
1168 0xffffffff, /* dst_mask */
1169 TRUE), /* pcrel_offset */
1170
1171 HOWTO (R_ARM_LDR_SB_G2, /* type */
1172 0, /* rightshift */
1173 2, /* size (0 = byte, 1 = short, 2 = long) */
1174 32, /* bitsize */
1175 TRUE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_dont,/* complain_on_overflow */
1178 bfd_elf_generic_reloc, /* special_function */
1179 "R_ARM_LDR_SB_G2", /* name */
1180 FALSE, /* partial_inplace */
1181 0xffffffff, /* src_mask */
1182 0xffffffff, /* dst_mask */
1183 TRUE), /* pcrel_offset */
1184
1185 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1186 0, /* rightshift */
1187 2, /* size (0 = byte, 1 = short, 2 = long) */
1188 32, /* bitsize */
1189 TRUE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_dont,/* complain_on_overflow */
1192 bfd_elf_generic_reloc, /* special_function */
1193 "R_ARM_LDRS_SB_G0", /* name */
1194 FALSE, /* partial_inplace */
1195 0xffffffff, /* src_mask */
1196 0xffffffff, /* dst_mask */
1197 TRUE), /* pcrel_offset */
1198
1199 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1200 0, /* rightshift */
1201 2, /* size (0 = byte, 1 = short, 2 = long) */
1202 32, /* bitsize */
1203 TRUE, /* pc_relative */
1204 0, /* bitpos */
1205 complain_overflow_dont,/* complain_on_overflow */
1206 bfd_elf_generic_reloc, /* special_function */
1207 "R_ARM_LDRS_SB_G1", /* name */
1208 FALSE, /* partial_inplace */
1209 0xffffffff, /* src_mask */
1210 0xffffffff, /* dst_mask */
1211 TRUE), /* pcrel_offset */
1212
1213 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1214 0, /* rightshift */
1215 2, /* size (0 = byte, 1 = short, 2 = long) */
1216 32, /* bitsize */
1217 TRUE, /* pc_relative */
1218 0, /* bitpos */
1219 complain_overflow_dont,/* complain_on_overflow */
1220 bfd_elf_generic_reloc, /* special_function */
1221 "R_ARM_LDRS_SB_G2", /* name */
1222 FALSE, /* partial_inplace */
1223 0xffffffff, /* src_mask */
1224 0xffffffff, /* dst_mask */
1225 TRUE), /* pcrel_offset */
1226
1227 HOWTO (R_ARM_LDC_SB_G0, /* type */
1228 0, /* rightshift */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1230 32, /* bitsize */
1231 TRUE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont,/* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_ARM_LDC_SB_G0", /* name */
1236 FALSE, /* partial_inplace */
1237 0xffffffff, /* src_mask */
1238 0xffffffff, /* dst_mask */
1239 TRUE), /* pcrel_offset */
1240
1241 HOWTO (R_ARM_LDC_SB_G1, /* type */
1242 0, /* rightshift */
1243 2, /* size (0 = byte, 1 = short, 2 = long) */
1244 32, /* bitsize */
1245 TRUE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont,/* complain_on_overflow */
1248 bfd_elf_generic_reloc, /* special_function */
1249 "R_ARM_LDC_SB_G1", /* name */
1250 FALSE, /* partial_inplace */
1251 0xffffffff, /* src_mask */
1252 0xffffffff, /* dst_mask */
1253 TRUE), /* pcrel_offset */
1254
1255 HOWTO (R_ARM_LDC_SB_G2, /* type */
1256 0, /* rightshift */
1257 2, /* size (0 = byte, 1 = short, 2 = long) */
1258 32, /* bitsize */
1259 TRUE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont,/* complain_on_overflow */
1262 bfd_elf_generic_reloc, /* special_function */
1263 "R_ARM_LDC_SB_G2", /* name */
1264 FALSE, /* partial_inplace */
1265 0xffffffff, /* src_mask */
1266 0xffffffff, /* dst_mask */
1267 TRUE), /* pcrel_offset */
1268
1269 /* End of group relocations. */
1270
1271 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1272 0, /* rightshift */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1274 16, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont,/* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_ARM_MOVW_BREL_NC", /* name */
1280 FALSE, /* partial_inplace */
1281 0x0000ffff, /* src_mask */
1282 0x0000ffff, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 HOWTO (R_ARM_MOVT_BREL, /* type */
1286 0, /* rightshift */
1287 2, /* size (0 = byte, 1 = short, 2 = long) */
1288 16, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_bitfield,/* complain_on_overflow */
1292 bfd_elf_generic_reloc, /* special_function */
1293 "R_ARM_MOVT_BREL", /* name */
1294 FALSE, /* partial_inplace */
1295 0x0000ffff, /* src_mask */
1296 0x0000ffff, /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 HOWTO (R_ARM_MOVW_BREL, /* type */
1300 0, /* rightshift */
1301 2, /* size (0 = byte, 1 = short, 2 = long) */
1302 16, /* bitsize */
1303 FALSE, /* pc_relative */
1304 0, /* bitpos */
1305 complain_overflow_dont,/* complain_on_overflow */
1306 bfd_elf_generic_reloc, /* special_function */
1307 "R_ARM_MOVW_BREL", /* name */
1308 FALSE, /* partial_inplace */
1309 0x0000ffff, /* src_mask */
1310 0x0000ffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1312
1313 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1314 0, /* rightshift */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_dont,/* complain_on_overflow */
1320 bfd_elf_generic_reloc, /* special_function */
1321 "R_ARM_THM_MOVW_BREL_NC",/* name */
1322 FALSE, /* partial_inplace */
1323 0x040f70ff, /* src_mask */
1324 0x040f70ff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1328 0, /* rightshift */
1329 2, /* size (0 = byte, 1 = short, 2 = long) */
1330 16, /* bitsize */
1331 FALSE, /* pc_relative */
1332 0, /* bitpos */
1333 complain_overflow_bitfield,/* complain_on_overflow */
1334 bfd_elf_generic_reloc, /* special_function */
1335 "R_ARM_THM_MOVT_BREL", /* name */
1336 FALSE, /* partial_inplace */
1337 0x040f70ff, /* src_mask */
1338 0x040f70ff, /* dst_mask */
1339 FALSE), /* pcrel_offset */
1340
1341 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1342 0, /* rightshift */
1343 2, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_dont,/* complain_on_overflow */
1348 bfd_elf_generic_reloc, /* special_function */
1349 "R_ARM_THM_MOVW_BREL", /* name */
1350 FALSE, /* partial_inplace */
1351 0x040f70ff, /* src_mask */
1352 0x040f70ff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 EMPTY_HOWTO (90), /* Unallocated. */
1356 EMPTY_HOWTO (91),
1357 EMPTY_HOWTO (92),
1358 EMPTY_HOWTO (93),
1359
1360 HOWTO (R_ARM_PLT32_ABS, /* type */
1361 0, /* rightshift */
1362 2, /* size (0 = byte, 1 = short, 2 = long) */
1363 32, /* bitsize */
1364 FALSE, /* pc_relative */
1365 0, /* bitpos */
1366 complain_overflow_dont,/* complain_on_overflow */
1367 bfd_elf_generic_reloc, /* special_function */
1368 "R_ARM_PLT32_ABS", /* name */
1369 FALSE, /* partial_inplace */
1370 0xffffffff, /* src_mask */
1371 0xffffffff, /* dst_mask */
1372 FALSE), /* pcrel_offset */
1373
1374 HOWTO (R_ARM_GOT_ABS, /* type */
1375 0, /* rightshift */
1376 2, /* size (0 = byte, 1 = short, 2 = long) */
1377 32, /* bitsize */
1378 FALSE, /* pc_relative */
1379 0, /* bitpos */
1380 complain_overflow_dont,/* complain_on_overflow */
1381 bfd_elf_generic_reloc, /* special_function */
1382 "R_ARM_GOT_ABS", /* name */
1383 FALSE, /* partial_inplace */
1384 0xffffffff, /* src_mask */
1385 0xffffffff, /* dst_mask */
1386 FALSE), /* pcrel_offset */
1387
1388 HOWTO (R_ARM_GOT_PREL, /* type */
1389 0, /* rightshift */
1390 2, /* size (0 = byte, 1 = short, 2 = long) */
1391 32, /* bitsize */
1392 TRUE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_dont, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_ARM_GOT_PREL", /* name */
1397 FALSE, /* partial_inplace */
1398 0xffffffff, /* src_mask */
1399 0xffffffff, /* dst_mask */
1400 TRUE), /* pcrel_offset */
1401
1402 HOWTO (R_ARM_GOT_BREL12, /* type */
1403 0, /* rightshift */
1404 2, /* size (0 = byte, 1 = short, 2 = long) */
1405 12, /* bitsize */
1406 FALSE, /* pc_relative */
1407 0, /* bitpos */
1408 complain_overflow_bitfield,/* complain_on_overflow */
1409 bfd_elf_generic_reloc, /* special_function */
1410 "R_ARM_GOT_BREL12", /* name */
1411 FALSE, /* partial_inplace */
1412 0x00000fff, /* src_mask */
1413 0x00000fff, /* dst_mask */
1414 FALSE), /* pcrel_offset */
1415
1416 HOWTO (R_ARM_GOTOFF12, /* type */
1417 0, /* rightshift */
1418 2, /* size (0 = byte, 1 = short, 2 = long) */
1419 12, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_bitfield,/* complain_on_overflow */
1423 bfd_elf_generic_reloc, /* special_function */
1424 "R_ARM_GOTOFF12", /* name */
1425 FALSE, /* partial_inplace */
1426 0x00000fff, /* src_mask */
1427 0x00000fff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1431
1432 /* GNU extension to record C++ vtable member usage */
1433 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1434 0, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 0, /* bitsize */
1437 FALSE, /* pc_relative */
1438 0, /* bitpos */
1439 complain_overflow_dont, /* complain_on_overflow */
1440 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1441 "R_ARM_GNU_VTENTRY", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0, /* dst_mask */
1445 FALSE), /* pcrel_offset */
1446
1447 /* GNU extension to record C++ vtable hierarchy */
1448 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 0, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 NULL, /* special_function */
1456 "R_ARM_GNU_VTINHERIT", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 HOWTO (R_ARM_THM_JUMP11, /* type */
1463 1, /* rightshift */
1464 1, /* size (0 = byte, 1 = short, 2 = long) */
1465 11, /* bitsize */
1466 TRUE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_signed, /* complain_on_overflow */
1469 bfd_elf_generic_reloc, /* special_function */
1470 "R_ARM_THM_JUMP11", /* name */
1471 FALSE, /* partial_inplace */
1472 0x000007ff, /* src_mask */
1473 0x000007ff, /* dst_mask */
1474 TRUE), /* pcrel_offset */
1475
1476 HOWTO (R_ARM_THM_JUMP8, /* type */
1477 1, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 8, /* bitsize */
1480 TRUE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_signed, /* complain_on_overflow */
1483 bfd_elf_generic_reloc, /* special_function */
1484 "R_ARM_THM_JUMP8", /* name */
1485 FALSE, /* partial_inplace */
1486 0x000000ff, /* src_mask */
1487 0x000000ff, /* dst_mask */
1488 TRUE), /* pcrel_offset */
1489
1490 /* TLS relocations */
1491 HOWTO (R_ARM_TLS_GD32, /* type */
1492 0, /* rightshift */
1493 2, /* size (0 = byte, 1 = short, 2 = long) */
1494 32, /* bitsize */
1495 FALSE, /* pc_relative */
1496 0, /* bitpos */
1497 complain_overflow_bitfield,/* complain_on_overflow */
1498 NULL, /* special_function */
1499 "R_ARM_TLS_GD32", /* name */
1500 TRUE, /* partial_inplace */
1501 0xffffffff, /* src_mask */
1502 0xffffffff, /* dst_mask */
1503 FALSE), /* pcrel_offset */
1504
1505 HOWTO (R_ARM_TLS_LDM32, /* type */
1506 0, /* rightshift */
1507 2, /* size (0 = byte, 1 = short, 2 = long) */
1508 32, /* bitsize */
1509 FALSE, /* pc_relative */
1510 0, /* bitpos */
1511 complain_overflow_bitfield,/* complain_on_overflow */
1512 bfd_elf_generic_reloc, /* special_function */
1513 "R_ARM_TLS_LDM32", /* name */
1514 TRUE, /* partial_inplace */
1515 0xffffffff, /* src_mask */
1516 0xffffffff, /* dst_mask */
1517 FALSE), /* pcrel_offset */
1518
1519 HOWTO (R_ARM_TLS_LDO32, /* type */
1520 0, /* rightshift */
1521 2, /* size (0 = byte, 1 = short, 2 = long) */
1522 32, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_bitfield,/* complain_on_overflow */
1526 bfd_elf_generic_reloc, /* special_function */
1527 "R_ARM_TLS_LDO32", /* name */
1528 TRUE, /* partial_inplace */
1529 0xffffffff, /* src_mask */
1530 0xffffffff, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 HOWTO (R_ARM_TLS_IE32, /* type */
1534 0, /* rightshift */
1535 2, /* size (0 = byte, 1 = short, 2 = long) */
1536 32, /* bitsize */
1537 FALSE, /* pc_relative */
1538 0, /* bitpos */
1539 complain_overflow_bitfield,/* complain_on_overflow */
1540 NULL, /* special_function */
1541 "R_ARM_TLS_IE32", /* name */
1542 TRUE, /* partial_inplace */
1543 0xffffffff, /* src_mask */
1544 0xffffffff, /* dst_mask */
1545 FALSE), /* pcrel_offset */
1546
1547 HOWTO (R_ARM_TLS_LE32, /* type */
1548 0, /* rightshift */
1549 2, /* size (0 = byte, 1 = short, 2 = long) */
1550 32, /* bitsize */
1551 FALSE, /* pc_relative */
1552 0, /* bitpos */
1553 complain_overflow_bitfield,/* complain_on_overflow */
1554 bfd_elf_generic_reloc, /* special_function */
1555 "R_ARM_TLS_LE32", /* name */
1556 TRUE, /* partial_inplace */
1557 0xffffffff, /* src_mask */
1558 0xffffffff, /* dst_mask */
1559 FALSE), /* pcrel_offset */
1560
1561 HOWTO (R_ARM_TLS_LDO12, /* type */
1562 0, /* rightshift */
1563 2, /* size (0 = byte, 1 = short, 2 = long) */
1564 12, /* bitsize */
1565 FALSE, /* pc_relative */
1566 0, /* bitpos */
1567 complain_overflow_bitfield,/* complain_on_overflow */
1568 bfd_elf_generic_reloc, /* special_function */
1569 "R_ARM_TLS_LDO12", /* name */
1570 FALSE, /* partial_inplace */
1571 0x00000fff, /* src_mask */
1572 0x00000fff, /* dst_mask */
1573 FALSE), /* pcrel_offset */
1574
1575 HOWTO (R_ARM_TLS_LE12, /* type */
1576 0, /* rightshift */
1577 2, /* size (0 = byte, 1 = short, 2 = long) */
1578 12, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_bitfield,/* complain_on_overflow */
1582 bfd_elf_generic_reloc, /* special_function */
1583 "R_ARM_TLS_LE12", /* name */
1584 FALSE, /* partial_inplace */
1585 0x00000fff, /* src_mask */
1586 0x00000fff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 HOWTO (R_ARM_TLS_IE12GP, /* type */
1590 0, /* rightshift */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 12, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_bitfield,/* complain_on_overflow */
1596 bfd_elf_generic_reloc, /* special_function */
1597 "R_ARM_TLS_IE12GP", /* name */
1598 FALSE, /* partial_inplace */
1599 0x00000fff, /* src_mask */
1600 0x00000fff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602 };
1603
1604 /* 112-127 private relocations
1605 128 R_ARM_ME_TOO, obsolete
1606 129-255 unallocated in AAELF.
1607
1608 249-255 extended, currently unused, relocations: */
1609
1610 static reloc_howto_type elf32_arm_howto_table_2[4] =
1611 {
1612 HOWTO (R_ARM_RREL32, /* type */
1613 0, /* rightshift */
1614 0, /* size (0 = byte, 1 = short, 2 = long) */
1615 0, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont,/* complain_on_overflow */
1619 bfd_elf_generic_reloc, /* special_function */
1620 "R_ARM_RREL32", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 HOWTO (R_ARM_RABS32, /* type */
1627 0, /* rightshift */
1628 0, /* size (0 = byte, 1 = short, 2 = long) */
1629 0, /* bitsize */
1630 FALSE, /* pc_relative */
1631 0, /* bitpos */
1632 complain_overflow_dont,/* complain_on_overflow */
1633 bfd_elf_generic_reloc, /* special_function */
1634 "R_ARM_RABS32", /* name */
1635 FALSE, /* partial_inplace */
1636 0, /* src_mask */
1637 0, /* dst_mask */
1638 FALSE), /* pcrel_offset */
1639
1640 HOWTO (R_ARM_RPC24, /* type */
1641 0, /* rightshift */
1642 0, /* size (0 = byte, 1 = short, 2 = long) */
1643 0, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont,/* complain_on_overflow */
1647 bfd_elf_generic_reloc, /* special_function */
1648 "R_ARM_RPC24", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 HOWTO (R_ARM_RBASE, /* type */
1655 0, /* rightshift */
1656 0, /* size (0 = byte, 1 = short, 2 = long) */
1657 0, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_dont,/* complain_on_overflow */
1661 bfd_elf_generic_reloc, /* special_function */
1662 "R_ARM_RBASE", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0, /* dst_mask */
1666 FALSE) /* pcrel_offset */
1667 };
1668
1669 static reloc_howto_type *
1670 elf32_arm_howto_from_type (unsigned int r_type)
1671 {
1672 if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
1673 return &elf32_arm_howto_table_1[r_type];
1674
1675 if (r_type >= R_ARM_RREL32
1676 && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_2))
1677 return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32];
1678
1679 return NULL;
1680 }
1681
1682 static void
1683 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1684 Elf_Internal_Rela * elf_reloc)
1685 {
1686 unsigned int r_type;
1687
1688 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1689 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1690 }
1691
1692 struct elf32_arm_reloc_map
1693 {
1694 bfd_reloc_code_real_type bfd_reloc_val;
1695 unsigned char elf_reloc_val;
1696 };
1697
1698 /* All entries in this list must also be present in elf32_arm_howto_table. */
1699 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1700 {
1701 {BFD_RELOC_NONE, R_ARM_NONE},
1702 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1703 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1704 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1705 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1706 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1707 {BFD_RELOC_32, R_ARM_ABS32},
1708 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1709 {BFD_RELOC_8, R_ARM_ABS8},
1710 {BFD_RELOC_16, R_ARM_ABS16},
1711 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1712 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1713 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1714 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1715 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1716 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1717 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1718 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1719 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1720 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1721 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1722 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1723 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1724 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1725 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1726 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1727 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1728 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1729 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1730 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1731 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1732 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1733 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1734 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1735 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1736 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1737 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1738 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1739 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1740 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1741 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1742 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1743 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1744 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1745 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1746 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1747 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1748 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1749 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1750 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1751 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1752 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1753 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1754 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1755 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1756 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1757 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1758 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1759 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1760 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1761 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1762 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1763 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1764 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1765 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1766 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1767 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1768 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1769 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1770 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1771 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1772 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1773 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1774 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1775 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1776 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1777 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
1778 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX}
1779 };
1780
1781 static reloc_howto_type *
1782 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1783 bfd_reloc_code_real_type code)
1784 {
1785 unsigned int i;
1786
1787 for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++)
1788 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1789 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1790
1791 return NULL;
1792 }
1793
1794 static reloc_howto_type *
1795 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1796 const char *r_name)
1797 {
1798 unsigned int i;
1799
1800 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); 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; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++)
1806 if (elf32_arm_howto_table_2[i].name != NULL
1807 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1808 return &elf32_arm_howto_table_2[i];
1809
1810 return NULL;
1811 }
1812
1813 /* Support for core dump NOTE sections. */
1814
1815 static bfd_boolean
1816 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1817 {
1818 int offset;
1819 size_t size;
1820
1821 switch (note->descsz)
1822 {
1823 default:
1824 return FALSE;
1825
1826 case 148: /* Linux/ARM 32-bit. */
1827 /* pr_cursig */
1828 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1829
1830 /* pr_pid */
1831 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1832
1833 /* pr_reg */
1834 offset = 72;
1835 size = 72;
1836
1837 break;
1838 }
1839
1840 /* Make a ".reg/999" section. */
1841 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1842 size, note->descpos + offset);
1843 }
1844
1845 static bfd_boolean
1846 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1847 {
1848 switch (note->descsz)
1849 {
1850 default:
1851 return FALSE;
1852
1853 case 124: /* Linux/ARM elf_prpsinfo. */
1854 elf_tdata (abfd)->core_program
1855 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1856 elf_tdata (abfd)->core_command
1857 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1858 }
1859
1860 /* Note that for some reason, a spurious space is tacked
1861 onto the end of the args in some (at least one anyway)
1862 implementations, so strip it off if it exists. */
1863 {
1864 char *command = elf_tdata (abfd)->core_command;
1865 int n = strlen (command);
1866
1867 if (0 < n && command[n - 1] == ' ')
1868 command[n - 1] = '\0';
1869 }
1870
1871 return TRUE;
1872 }
1873
1874 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1875 #define TARGET_LITTLE_NAME "elf32-littlearm"
1876 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1877 #define TARGET_BIG_NAME "elf32-bigarm"
1878
1879 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1880 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1881
1882 typedef unsigned long int insn32;
1883 typedef unsigned short int insn16;
1884
1885 /* In lieu of proper flags, assume all EABIv4 or later objects are
1886 interworkable. */
1887 #define INTERWORK_FLAG(abfd) \
1888 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1889 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \
1890 || ((abfd)->flags & BFD_LINKER_CREATED))
1891
1892 /* The linker script knows the section names for placement.
1893 The entry_names are used to do simple name mangling on the stubs.
1894 Given a function name, and its type, the stub can be found. The
1895 name can be changed. The only requirement is the %s be present. */
1896 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1897 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1898
1899 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1900 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1901
1902 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1903 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1904
1905 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
1906 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
1907
1908 #define STUB_ENTRY_NAME "__%s_veneer"
1909
1910 /* The name of the dynamic interpreter. This is put in the .interp
1911 section. */
1912 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1913
1914 #ifdef FOUR_WORD_PLT
1915
1916 /* The first entry in a procedure linkage table looks like
1917 this. It is set up so that any shared library function that is
1918 called before the relocation has been set up calls the dynamic
1919 linker first. */
1920 static const bfd_vma elf32_arm_plt0_entry [] =
1921 {
1922 0xe52de004, /* str lr, [sp, #-4]! */
1923 0xe59fe010, /* ldr lr, [pc, #16] */
1924 0xe08fe00e, /* add lr, pc, lr */
1925 0xe5bef008, /* ldr pc, [lr, #8]! */
1926 };
1927
1928 /* Subsequent entries in a procedure linkage table look like
1929 this. */
1930 static const bfd_vma elf32_arm_plt_entry [] =
1931 {
1932 0xe28fc600, /* add ip, pc, #NN */
1933 0xe28cca00, /* add ip, ip, #NN */
1934 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1935 0x00000000, /* unused */
1936 };
1937
1938 #else
1939
1940 /* The first entry in a procedure linkage table looks like
1941 this. It is set up so that any shared library function that is
1942 called before the relocation has been set up calls the dynamic
1943 linker first. */
1944 static const bfd_vma elf32_arm_plt0_entry [] =
1945 {
1946 0xe52de004, /* str lr, [sp, #-4]! */
1947 0xe59fe004, /* ldr lr, [pc, #4] */
1948 0xe08fe00e, /* add lr, pc, lr */
1949 0xe5bef008, /* ldr pc, [lr, #8]! */
1950 0x00000000, /* &GOT[0] - . */
1951 };
1952
1953 /* Subsequent entries in a procedure linkage table look like
1954 this. */
1955 static const bfd_vma elf32_arm_plt_entry [] =
1956 {
1957 0xe28fc600, /* add ip, pc, #0xNN00000 */
1958 0xe28cca00, /* add ip, ip, #0xNN000 */
1959 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1960 };
1961
1962 #endif
1963
1964 /* The format of the first entry in the procedure linkage table
1965 for a VxWorks executable. */
1966 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1967 {
1968 0xe52dc008, /* str ip,[sp,#-8]! */
1969 0xe59fc000, /* ldr ip,[pc] */
1970 0xe59cf008, /* ldr pc,[ip,#8] */
1971 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1972 };
1973
1974 /* The format of subsequent entries in a VxWorks executable. */
1975 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1976 {
1977 0xe59fc000, /* ldr ip,[pc] */
1978 0xe59cf000, /* ldr pc,[ip] */
1979 0x00000000, /* .long @got */
1980 0xe59fc000, /* ldr ip,[pc] */
1981 0xea000000, /* b _PLT */
1982 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1983 };
1984
1985 /* The format of entries in a VxWorks shared library. */
1986 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1987 {
1988 0xe59fc000, /* ldr ip,[pc] */
1989 0xe79cf009, /* ldr pc,[ip,r9] */
1990 0x00000000, /* .long @got */
1991 0xe59fc000, /* ldr ip,[pc] */
1992 0xe599f008, /* ldr pc,[r9,#8] */
1993 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1994 };
1995
1996 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1997 #define PLT_THUMB_STUB_SIZE 4
1998 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1999 {
2000 0x4778, /* bx pc */
2001 0x46c0 /* nop */
2002 };
2003
2004 /* The entries in a PLT when using a DLL-based target with multiple
2005 address spaces. */
2006 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2007 {
2008 0xe51ff004, /* ldr pc, [pc, #-4] */
2009 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2010 };
2011
2012 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2013 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2014 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2015 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2016 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2017 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2018
2019 enum stub_insn_type
2020 {
2021 THUMB16_TYPE = 1,
2022 THUMB32_TYPE,
2023 ARM_TYPE,
2024 DATA_TYPE
2025 };
2026
2027 #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0}
2028 #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0}
2029 #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0}
2030 #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)}
2031 #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)}
2032
2033 typedef struct
2034 {
2035 bfd_vma data;
2036 enum stub_insn_type type;
2037 unsigned int r_type;
2038 int reloc_addend;
2039 } insn_sequence;
2040
2041 /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx
2042 to reach the stub if necessary. */
2043 static const insn_sequence elf32_arm_stub_long_branch_any_any[] =
2044 {
2045 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2046 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2047 };
2048
2049 /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not
2050 available. */
2051 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb[] =
2052 {
2053 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2054 ARM_INSN(0xe12fff1c), /* bx ip */
2055 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2056 };
2057
2058 /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */
2059 static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] =
2060 {
2061 THUMB16_INSN(0xb401), /* push {r0} */
2062 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2063 THUMB16_INSN(0x4684), /* mov ip, r0 */
2064 THUMB16_INSN(0xbc01), /* pop {r0} */
2065 THUMB16_INSN(0x4760), /* bx ip */
2066 THUMB16_INSN(0xbf00), /* nop */
2067 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2068 };
2069
2070 /* V4T Thumb -> Thumb long branch stub. Using the stack is not
2071 allowed. */
2072 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] =
2073 {
2074 THUMB16_INSN(0x4778), /* bx pc */
2075 THUMB16_INSN(0x46c0), /* nop */
2076 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2077 ARM_INSN(0xe12fff1c), /* bx ip */
2078 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2079 };
2080
2081 /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not
2082 available. */
2083 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] =
2084 {
2085 THUMB16_INSN(0x4778), /* bx pc */
2086 THUMB16_INSN(0x46c0), /* nop */
2087 ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */
2088 DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */
2089 };
2090
2091 /* V4T Thumb -> ARM short branch stub. Shorter variant of the above
2092 one, when the destination is close enough. */
2093 static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] =
2094 {
2095 THUMB16_INSN(0x4778), /* bx pc */
2096 THUMB16_INSN(0x46c0), /* nop */
2097 ARM_REL_INSN(0xea000000, -8), /* b (X-8) */
2098 };
2099
2100 /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use
2101 blx to reach the stub if necessary. */
2102 static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic[] =
2103 {
2104 ARM_INSN(0xe59fc000), /* ldr r12, [pc] */
2105 ARM_INSN(0xe08ff00c), /* add pc, pc, ip */
2106 DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */
2107 };
2108
2109 /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use
2110 blx to reach the stub if necessary. We can not add into pc;
2111 it is not guaranteed to mode switch (different in ARMv6 and
2112 ARMv7). */
2113 static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic[] =
2114 {
2115 ARM_INSN(0xe59fc004), /* ldr r12, [pc, #4] */
2116 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2117 ARM_INSN(0xe12fff1c), /* bx ip */
2118 DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2119 };
2120
2121 /* V4T ARM -> ARM long branch stub, PIC. */
2122 static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] =
2123 {
2124 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2125 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2126 ARM_INSN(0xe12fff1c), /* bx ip */
2127 DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2128 };
2129
2130 /* V4T Thumb -> ARM long branch stub, PIC. */
2131 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] =
2132 {
2133 THUMB16_INSN(0x4778), /* bx pc */
2134 THUMB16_INSN(0x46c0), /* nop */
2135 ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */
2136 ARM_INSN(0xe08cf00f), /* add pc, ip, pc */
2137 DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */
2138 };
2139
2140 /* Thumb -> Thumb long branch stub, PIC. Used on M-profile
2141 architectures. */
2142 static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] =
2143 {
2144 THUMB16_INSN(0xb401), /* push {r0} */
2145 THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */
2146 THUMB16_INSN(0x46fc), /* mov ip, pc */
2147 THUMB16_INSN(0x4484), /* add ip, r0 */
2148 THUMB16_INSN(0xbc01), /* pop {r0} */
2149 THUMB16_INSN(0x4760), /* bx ip */
2150 DATA_WORD(0, R_ARM_REL32, 4), /* dcd R_ARM_REL32(X) */
2151 };
2152
2153 /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not
2154 allowed. */
2155 static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] =
2156 {
2157 THUMB16_INSN(0x4778), /* bx pc */
2158 THUMB16_INSN(0x46c0), /* nop */
2159 ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */
2160 ARM_INSN(0xe08fc00c), /* add ip, pc, ip */
2161 ARM_INSN(0xe12fff1c), /* bx ip */
2162 DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */
2163 };
2164
2165 /* Section name for stubs is the associated section name plus this
2166 string. */
2167 #define STUB_SUFFIX ".stub"
2168
2169 enum elf32_arm_stub_type
2170 {
2171 arm_stub_none,
2172 arm_stub_long_branch_any_any,
2173 arm_stub_long_branch_v4t_arm_thumb,
2174 arm_stub_long_branch_thumb_only,
2175 arm_stub_long_branch_v4t_thumb_thumb,
2176 arm_stub_long_branch_v4t_thumb_arm,
2177 arm_stub_short_branch_v4t_thumb_arm,
2178 arm_stub_long_branch_any_arm_pic,
2179 arm_stub_long_branch_any_thumb_pic,
2180 arm_stub_long_branch_v4t_arm_thumb_pic,
2181 arm_stub_long_branch_v4t_thumb_arm_pic,
2182 arm_stub_long_branch_thumb_only_pic,
2183 arm_stub_long_branch_v4t_thumb_thumb_pic,
2184 };
2185
2186 struct elf32_arm_stub_hash_entry
2187 {
2188 /* Base hash table entry structure. */
2189 struct bfd_hash_entry root;
2190
2191 /* The stub section. */
2192 asection *stub_sec;
2193
2194 /* Offset within stub_sec of the beginning of this stub. */
2195 bfd_vma stub_offset;
2196
2197 /* Given the symbol's value and its section we can determine its final
2198 value when building the stubs (so the stub knows where to jump). */
2199 bfd_vma target_value;
2200 asection *target_section;
2201
2202 /* The stub type. */
2203 enum elf32_arm_stub_type stub_type;
2204 /* Its encoding size in bytes. */
2205 int stub_size;
2206 /* Its template. */
2207 const insn_sequence *stub_template;
2208 /* The size of the template (number of entries). */
2209 int stub_template_size;
2210
2211 /* The symbol table entry, if any, that this was derived from. */
2212 struct elf32_arm_link_hash_entry *h;
2213
2214 /* Destination symbol type (STT_ARM_TFUNC, ...) */
2215 unsigned char st_type;
2216
2217 /* Where this stub is being called from, or, in the case of combined
2218 stub sections, the first input section in the group. */
2219 asection *id_sec;
2220
2221 /* The name for the local symbol at the start of this stub. The
2222 stub name in the hash table has to be unique; this does not, so
2223 it can be friendlier. */
2224 char *output_name;
2225 };
2226
2227 /* Used to build a map of a section. This is required for mixed-endian
2228 code/data. */
2229
2230 typedef struct elf32_elf_section_map
2231 {
2232 bfd_vma vma;
2233 char type;
2234 }
2235 elf32_arm_section_map;
2236
2237 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2238
2239 typedef enum
2240 {
2241 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2242 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2243 VFP11_ERRATUM_ARM_VENEER,
2244 VFP11_ERRATUM_THUMB_VENEER
2245 }
2246 elf32_vfp11_erratum_type;
2247
2248 typedef struct elf32_vfp11_erratum_list
2249 {
2250 struct elf32_vfp11_erratum_list *next;
2251 bfd_vma vma;
2252 union
2253 {
2254 struct
2255 {
2256 struct elf32_vfp11_erratum_list *veneer;
2257 unsigned int vfp_insn;
2258 } b;
2259 struct
2260 {
2261 struct elf32_vfp11_erratum_list *branch;
2262 unsigned int id;
2263 } v;
2264 } u;
2265 elf32_vfp11_erratum_type type;
2266 }
2267 elf32_vfp11_erratum_list;
2268
2269 typedef struct _arm_elf_section_data
2270 {
2271 struct bfd_elf_section_data elf;
2272 unsigned int mapcount;
2273 unsigned int mapsize;
2274 elf32_arm_section_map *map;
2275 unsigned int erratumcount;
2276 elf32_vfp11_erratum_list *erratumlist;
2277 }
2278 _arm_elf_section_data;
2279
2280 #define elf32_arm_section_data(sec) \
2281 ((_arm_elf_section_data *) elf_section_data (sec))
2282
2283 /* The size of the thread control block. */
2284 #define TCB_SIZE 8
2285
2286 struct elf_arm_obj_tdata
2287 {
2288 struct elf_obj_tdata root;
2289
2290 /* tls_type for each local got entry. */
2291 char *local_got_tls_type;
2292
2293 /* Zero to warn when linking objects with incompatible enum sizes. */
2294 int no_enum_size_warning;
2295
2296 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2297 int no_wchar_size_warning;
2298 };
2299
2300 #define elf_arm_tdata(bfd) \
2301 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2302
2303 #define elf32_arm_local_got_tls_type(bfd) \
2304 (elf_arm_tdata (bfd)->local_got_tls_type)
2305
2306 #define is_arm_elf(bfd) \
2307 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2308 && elf_tdata (bfd) != NULL \
2309 && elf_object_id (bfd) == ARM_ELF_TDATA)
2310
2311 static bfd_boolean
2312 elf32_arm_mkobject (bfd *abfd)
2313 {
2314 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2315 ARM_ELF_TDATA);
2316 }
2317
2318 /* The ARM linker needs to keep track of the number of relocs that it
2319 decides to copy in check_relocs for each symbol. This is so that
2320 it can discard PC relative relocs if it doesn't need them when
2321 linking with -Bsymbolic. We store the information in a field
2322 extending the regular ELF linker hash table. */
2323
2324 /* This structure keeps track of the number of relocs we have copied
2325 for a given symbol. */
2326 struct elf32_arm_relocs_copied
2327 {
2328 /* Next section. */
2329 struct elf32_arm_relocs_copied * next;
2330 /* A section in dynobj. */
2331 asection * section;
2332 /* Number of relocs copied in this section. */
2333 bfd_size_type count;
2334 /* Number of PC-relative relocs copied in this section. */
2335 bfd_size_type pc_count;
2336 };
2337
2338 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2339
2340 /* Arm ELF linker hash entry. */
2341 struct elf32_arm_link_hash_entry
2342 {
2343 struct elf_link_hash_entry root;
2344
2345 /* Number of PC relative relocs copied for this symbol. */
2346 struct elf32_arm_relocs_copied * relocs_copied;
2347
2348 /* We reference count Thumb references to a PLT entry separately,
2349 so that we can emit the Thumb trampoline only if needed. */
2350 bfd_signed_vma plt_thumb_refcount;
2351
2352 /* Some references from Thumb code may be eliminated by BL->BLX
2353 conversion, so record them separately. */
2354 bfd_signed_vma plt_maybe_thumb_refcount;
2355
2356 /* Since PLT entries have variable size if the Thumb prologue is
2357 used, we need to record the index into .got.plt instead of
2358 recomputing it from the PLT offset. */
2359 bfd_signed_vma plt_got_offset;
2360
2361 #define GOT_UNKNOWN 0
2362 #define GOT_NORMAL 1
2363 #define GOT_TLS_GD 2
2364 #define GOT_TLS_IE 4
2365 unsigned char tls_type;
2366
2367 /* The symbol marking the real symbol location for exported thumb
2368 symbols with Arm stubs. */
2369 struct elf_link_hash_entry *export_glue;
2370
2371 /* A pointer to the most recently used stub hash entry against this
2372 symbol. */
2373 struct elf32_arm_stub_hash_entry *stub_cache;
2374 };
2375
2376 /* Traverse an arm ELF linker hash table. */
2377 #define elf32_arm_link_hash_traverse(table, func, info) \
2378 (elf_link_hash_traverse \
2379 (&(table)->root, \
2380 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2381 (info)))
2382
2383 /* Get the ARM elf linker hash table from a link_info structure. */
2384 #define elf32_arm_hash_table(info) \
2385 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2386
2387 #define arm_stub_hash_lookup(table, string, create, copy) \
2388 ((struct elf32_arm_stub_hash_entry *) \
2389 bfd_hash_lookup ((table), (string), (create), (copy)))
2390
2391 /* ARM ELF linker hash table. */
2392 struct elf32_arm_link_hash_table
2393 {
2394 /* The main hash table. */
2395 struct elf_link_hash_table root;
2396
2397 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2398 bfd_size_type thumb_glue_size;
2399
2400 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2401 bfd_size_type arm_glue_size;
2402
2403 /* The size in bytes of section containing the ARMv4 BX veneers. */
2404 bfd_size_type bx_glue_size;
2405
2406 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2407 veneer has been populated. */
2408 bfd_vma bx_glue_offset[15];
2409
2410 /* The size in bytes of the section containing glue for VFP11 erratum
2411 veneers. */
2412 bfd_size_type vfp11_erratum_glue_size;
2413
2414 /* An arbitrary input BFD chosen to hold the glue sections. */
2415 bfd * bfd_of_glue_owner;
2416
2417 /* Nonzero to output a BE8 image. */
2418 int byteswap_code;
2419
2420 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2421 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2422 int target1_is_rel;
2423
2424 /* The relocation to use for R_ARM_TARGET2 relocations. */
2425 int target2_reloc;
2426
2427 /* 0 = Ignore R_ARM_V4BX.
2428 1 = Convert BX to MOV PC.
2429 2 = Generate v4 interworing stubs. */
2430 int fix_v4bx;
2431
2432 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2433 int use_blx;
2434
2435 /* What sort of code sequences we should look for which may trigger the
2436 VFP11 denorm erratum. */
2437 bfd_arm_vfp11_fix vfp11_fix;
2438
2439 /* Global counter for the number of fixes we have emitted. */
2440 int num_vfp11_fixes;
2441
2442 /* Nonzero to force PIC branch veneers. */
2443 int pic_veneer;
2444
2445 /* The number of bytes in the initial entry in the PLT. */
2446 bfd_size_type plt_header_size;
2447
2448 /* The number of bytes in the subsequent PLT etries. */
2449 bfd_size_type plt_entry_size;
2450
2451 /* True if the target system is VxWorks. */
2452 int vxworks_p;
2453
2454 /* True if the target system is Symbian OS. */
2455 int symbian_p;
2456
2457 /* True if the target uses REL relocations. */
2458 int use_rel;
2459
2460 /* Short-cuts to get to dynamic linker sections. */
2461 asection *sgot;
2462 asection *sgotplt;
2463 asection *srelgot;
2464 asection *splt;
2465 asection *srelplt;
2466 asection *sdynbss;
2467 asection *srelbss;
2468
2469 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2470 asection *srelplt2;
2471
2472 /* Data for R_ARM_TLS_LDM32 relocations. */
2473 union
2474 {
2475 bfd_signed_vma refcount;
2476 bfd_vma offset;
2477 } tls_ldm_got;
2478
2479 /* Small local sym to section mapping cache. */
2480 struct sym_sec_cache sym_sec;
2481
2482 /* For convenience in allocate_dynrelocs. */
2483 bfd * obfd;
2484
2485 /* The stub hash table. */
2486 struct bfd_hash_table stub_hash_table;
2487
2488 /* Linker stub bfd. */
2489 bfd *stub_bfd;
2490
2491 /* Linker call-backs. */
2492 asection * (*add_stub_section) (const char *, asection *);
2493 void (*layout_sections_again) (void);
2494
2495 /* Array to keep track of which stub sections have been created, and
2496 information on stub grouping. */
2497 struct map_stub
2498 {
2499 /* This is the section to which stubs in the group will be
2500 attached. */
2501 asection *link_sec;
2502 /* The stub section. */
2503 asection *stub_sec;
2504 } *stub_group;
2505
2506 /* Assorted information used by elf32_arm_size_stubs. */
2507 unsigned int bfd_count;
2508 int top_index;
2509 asection **input_list;
2510 };
2511
2512 /* Create an entry in an ARM ELF linker hash table. */
2513
2514 static struct bfd_hash_entry *
2515 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2516 struct bfd_hash_table * table,
2517 const char * string)
2518 {
2519 struct elf32_arm_link_hash_entry * ret =
2520 (struct elf32_arm_link_hash_entry *) entry;
2521
2522 /* Allocate the structure if it has not already been allocated by a
2523 subclass. */
2524 if (ret == NULL)
2525 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2526 if (ret == NULL)
2527 return (struct bfd_hash_entry *) ret;
2528
2529 /* Call the allocation method of the superclass. */
2530 ret = ((struct elf32_arm_link_hash_entry *)
2531 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2532 table, string));
2533 if (ret != NULL)
2534 {
2535 ret->relocs_copied = NULL;
2536 ret->tls_type = GOT_UNKNOWN;
2537 ret->plt_thumb_refcount = 0;
2538 ret->plt_maybe_thumb_refcount = 0;
2539 ret->plt_got_offset = -1;
2540 ret->export_glue = NULL;
2541
2542 ret->stub_cache = NULL;
2543 }
2544
2545 return (struct bfd_hash_entry *) ret;
2546 }
2547
2548 /* Initialize an entry in the stub hash table. */
2549
2550 static struct bfd_hash_entry *
2551 stub_hash_newfunc (struct bfd_hash_entry *entry,
2552 struct bfd_hash_table *table,
2553 const char *string)
2554 {
2555 /* Allocate the structure if it has not already been allocated by a
2556 subclass. */
2557 if (entry == NULL)
2558 {
2559 entry = bfd_hash_allocate (table,
2560 sizeof (struct elf32_arm_stub_hash_entry));
2561 if (entry == NULL)
2562 return entry;
2563 }
2564
2565 /* Call the allocation method of the superclass. */
2566 entry = bfd_hash_newfunc (entry, table, string);
2567 if (entry != NULL)
2568 {
2569 struct elf32_arm_stub_hash_entry *eh;
2570
2571 /* Initialize the local fields. */
2572 eh = (struct elf32_arm_stub_hash_entry *) entry;
2573 eh->stub_sec = NULL;
2574 eh->stub_offset = 0;
2575 eh->target_value = 0;
2576 eh->target_section = NULL;
2577 eh->stub_type = arm_stub_none;
2578 eh->stub_size = 0;
2579 eh->stub_template = NULL;
2580 eh->stub_template_size = 0;
2581 eh->h = NULL;
2582 eh->id_sec = NULL;
2583 }
2584
2585 return entry;
2586 }
2587
2588 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2589 shortcuts to them in our hash table. */
2590
2591 static bfd_boolean
2592 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2593 {
2594 struct elf32_arm_link_hash_table *htab;
2595
2596 htab = elf32_arm_hash_table (info);
2597 /* BPABI objects never have a GOT, or associated sections. */
2598 if (htab->symbian_p)
2599 return TRUE;
2600
2601 if (! _bfd_elf_create_got_section (dynobj, info))
2602 return FALSE;
2603
2604 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2605 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2606 if (!htab->sgot || !htab->sgotplt)
2607 abort ();
2608
2609 htab->srelgot = bfd_make_section_with_flags (dynobj,
2610 RELOC_SECTION (htab, ".got"),
2611 (SEC_ALLOC | SEC_LOAD
2612 | SEC_HAS_CONTENTS
2613 | SEC_IN_MEMORY
2614 | SEC_LINKER_CREATED
2615 | SEC_READONLY));
2616 if (htab->srelgot == NULL
2617 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2618 return FALSE;
2619 return TRUE;
2620 }
2621
2622 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2623 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2624 hash table. */
2625
2626 static bfd_boolean
2627 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2628 {
2629 struct elf32_arm_link_hash_table *htab;
2630
2631 htab = elf32_arm_hash_table (info);
2632 if (!htab->sgot && !create_got_section (dynobj, info))
2633 return FALSE;
2634
2635 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2636 return FALSE;
2637
2638 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2639 htab->srelplt = bfd_get_section_by_name (dynobj,
2640 RELOC_SECTION (htab, ".plt"));
2641 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2642 if (!info->shared)
2643 htab->srelbss = bfd_get_section_by_name (dynobj,
2644 RELOC_SECTION (htab, ".bss"));
2645
2646 if (htab->vxworks_p)
2647 {
2648 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2649 return FALSE;
2650
2651 if (info->shared)
2652 {
2653 htab->plt_header_size = 0;
2654 htab->plt_entry_size
2655 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2656 }
2657 else
2658 {
2659 htab->plt_header_size
2660 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2661 htab->plt_entry_size
2662 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2663 }
2664 }
2665
2666 if (!htab->splt
2667 || !htab->srelplt
2668 || !htab->sdynbss
2669 || (!info->shared && !htab->srelbss))
2670 abort ();
2671
2672 return TRUE;
2673 }
2674
2675 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2676
2677 static void
2678 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2679 struct elf_link_hash_entry *dir,
2680 struct elf_link_hash_entry *ind)
2681 {
2682 struct elf32_arm_link_hash_entry *edir, *eind;
2683
2684 edir = (struct elf32_arm_link_hash_entry *) dir;
2685 eind = (struct elf32_arm_link_hash_entry *) ind;
2686
2687 if (eind->relocs_copied != NULL)
2688 {
2689 if (edir->relocs_copied != NULL)
2690 {
2691 struct elf32_arm_relocs_copied **pp;
2692 struct elf32_arm_relocs_copied *p;
2693
2694 /* Add reloc counts against the indirect sym to the direct sym
2695 list. Merge any entries against the same section. */
2696 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2697 {
2698 struct elf32_arm_relocs_copied *q;
2699
2700 for (q = edir->relocs_copied; q != NULL; q = q->next)
2701 if (q->section == p->section)
2702 {
2703 q->pc_count += p->pc_count;
2704 q->count += p->count;
2705 *pp = p->next;
2706 break;
2707 }
2708 if (q == NULL)
2709 pp = &p->next;
2710 }
2711 *pp = edir->relocs_copied;
2712 }
2713
2714 edir->relocs_copied = eind->relocs_copied;
2715 eind->relocs_copied = NULL;
2716 }
2717
2718 if (ind->root.type == bfd_link_hash_indirect)
2719 {
2720 /* Copy over PLT info. */
2721 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2722 eind->plt_thumb_refcount = 0;
2723 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
2724 eind->plt_maybe_thumb_refcount = 0;
2725
2726 if (dir->got.refcount <= 0)
2727 {
2728 edir->tls_type = eind->tls_type;
2729 eind->tls_type = GOT_UNKNOWN;
2730 }
2731 }
2732
2733 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2734 }
2735
2736 /* Create an ARM elf linker hash table. */
2737
2738 static struct bfd_link_hash_table *
2739 elf32_arm_link_hash_table_create (bfd *abfd)
2740 {
2741 struct elf32_arm_link_hash_table *ret;
2742 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2743
2744 ret = bfd_malloc (amt);
2745 if (ret == NULL)
2746 return NULL;
2747
2748 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2749 elf32_arm_link_hash_newfunc,
2750 sizeof (struct elf32_arm_link_hash_entry)))
2751 {
2752 free (ret);
2753 return NULL;
2754 }
2755
2756 ret->sgot = NULL;
2757 ret->sgotplt = NULL;
2758 ret->srelgot = NULL;
2759 ret->splt = NULL;
2760 ret->srelplt = NULL;
2761 ret->sdynbss = NULL;
2762 ret->srelbss = NULL;
2763 ret->srelplt2 = NULL;
2764 ret->thumb_glue_size = 0;
2765 ret->arm_glue_size = 0;
2766 ret->bx_glue_size = 0;
2767 memset (ret->bx_glue_offset, 0, sizeof (ret->bx_glue_offset));
2768 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2769 ret->vfp11_erratum_glue_size = 0;
2770 ret->num_vfp11_fixes = 0;
2771 ret->bfd_of_glue_owner = NULL;
2772 ret->byteswap_code = 0;
2773 ret->target1_is_rel = 0;
2774 ret->target2_reloc = R_ARM_NONE;
2775 #ifdef FOUR_WORD_PLT
2776 ret->plt_header_size = 16;
2777 ret->plt_entry_size = 16;
2778 #else
2779 ret->plt_header_size = 20;
2780 ret->plt_entry_size = 12;
2781 #endif
2782 ret->fix_v4bx = 0;
2783 ret->use_blx = 0;
2784 ret->vxworks_p = 0;
2785 ret->symbian_p = 0;
2786 ret->use_rel = 1;
2787 ret->sym_sec.abfd = NULL;
2788 ret->obfd = abfd;
2789 ret->tls_ldm_got.refcount = 0;
2790 ret->stub_bfd = NULL;
2791 ret->add_stub_section = NULL;
2792 ret->layout_sections_again = NULL;
2793 ret->stub_group = NULL;
2794 ret->bfd_count = 0;
2795 ret->top_index = 0;
2796 ret->input_list = NULL;
2797
2798 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2799 sizeof (struct elf32_arm_stub_hash_entry)))
2800 {
2801 free (ret);
2802 return NULL;
2803 }
2804
2805 return &ret->root.root;
2806 }
2807
2808 /* Free the derived linker hash table. */
2809
2810 static void
2811 elf32_arm_hash_table_free (struct bfd_link_hash_table *hash)
2812 {
2813 struct elf32_arm_link_hash_table *ret
2814 = (struct elf32_arm_link_hash_table *) hash;
2815
2816 bfd_hash_table_free (&ret->stub_hash_table);
2817 _bfd_generic_link_hash_table_free (hash);
2818 }
2819
2820 /* Determine if we're dealing with a Thumb only architecture. */
2821
2822 static bfd_boolean
2823 using_thumb_only (struct elf32_arm_link_hash_table *globals)
2824 {
2825 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2826 Tag_CPU_arch);
2827 int profile;
2828
2829 if (arch != TAG_CPU_ARCH_V7)
2830 return FALSE;
2831
2832 profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2833 Tag_CPU_arch_profile);
2834
2835 return profile == 'M';
2836 }
2837
2838 /* Determine if we're dealing with a Thumb-2 object. */
2839
2840 static bfd_boolean
2841 using_thumb2 (struct elf32_arm_link_hash_table *globals)
2842 {
2843 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2844 Tag_CPU_arch);
2845 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
2846 }
2847
2848 static bfd_boolean
2849 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
2850 {
2851 switch (stub_type)
2852 {
2853 case arm_stub_long_branch_thumb_only:
2854 case arm_stub_long_branch_v4t_thumb_arm:
2855 case arm_stub_short_branch_v4t_thumb_arm:
2856 case arm_stub_long_branch_v4t_thumb_arm_pic:
2857 case arm_stub_long_branch_thumb_only_pic:
2858 return TRUE;
2859 case arm_stub_none:
2860 BFD_FAIL ();
2861 return FALSE;
2862 break;
2863 default:
2864 return FALSE;
2865 }
2866 }
2867
2868 /* Determine the type of stub needed, if any, for a call. */
2869
2870 static enum elf32_arm_stub_type
2871 arm_type_of_stub (struct bfd_link_info *info,
2872 asection *input_sec,
2873 const Elf_Internal_Rela *rel,
2874 unsigned char st_type,
2875 struct elf32_arm_link_hash_entry *hash,
2876 bfd_vma destination,
2877 asection *sym_sec,
2878 bfd *input_bfd,
2879 const char *name)
2880 {
2881 bfd_vma location;
2882 bfd_signed_vma branch_offset;
2883 unsigned int r_type;
2884 struct elf32_arm_link_hash_table * globals;
2885 int thumb2;
2886 int thumb_only;
2887 enum elf32_arm_stub_type stub_type = arm_stub_none;
2888 int use_plt = 0;
2889
2890 /* We don't know the actual type of destination in case it is of
2891 type STT_SECTION: give up. */
2892 if (st_type == STT_SECTION)
2893 return stub_type;
2894
2895 globals = elf32_arm_hash_table (info);
2896
2897 thumb_only = using_thumb_only (globals);
2898
2899 thumb2 = using_thumb2 (globals);
2900
2901 /* Determine where the call point is. */
2902 location = (input_sec->output_offset
2903 + input_sec->output_section->vma
2904 + rel->r_offset);
2905
2906 branch_offset = (bfd_signed_vma)(destination - location);
2907
2908 r_type = ELF32_R_TYPE (rel->r_info);
2909
2910 /* Keep a simpler condition, for the sake of clarity. */
2911 if (globals->splt != NULL && hash != NULL && hash->root.plt.offset != (bfd_vma) -1)
2912 {
2913 use_plt = 1;
2914 /* Note when dealing with PLT entries: the main PLT stub is in
2915 ARM mode, so if the branch is in Thumb mode, another
2916 Thumb->ARM stub will be inserted later just before the ARM
2917 PLT stub. We don't take this extra distance into account
2918 here, because if a long branch stub is needed, we'll add a
2919 Thumb->Arm one and branch directly to the ARM PLT entry
2920 because it avoids spreading offset corrections in several
2921 places. */
2922 }
2923
2924 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24)
2925 {
2926 /* Handle cases where:
2927 - this call goes too far (different Thumb/Thumb2 max
2928 distance)
2929 - it's a Thumb->Arm call and blx is not available, or it's a
2930 Thumb->Arm branch (not bl). A stub is needed in this case,
2931 but only if this call is not through a PLT entry. Indeed,
2932 PLT stubs handle mode switching already.
2933 */
2934 if ((!thumb2
2935 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
2936 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
2937 || (thumb2
2938 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
2939 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
2940 || ((st_type != STT_ARM_TFUNC)
2941 && (((r_type == R_ARM_THM_CALL) && !globals->use_blx)
2942 || (r_type == R_ARM_THM_JUMP24))
2943 && !use_plt))
2944 {
2945 if (st_type == STT_ARM_TFUNC)
2946 {
2947 /* Thumb to thumb. */
2948 if (!thumb_only)
2949 {
2950 stub_type = (info->shared | globals->pic_veneer)
2951 /* PIC stubs. */
2952 ? ((globals->use_blx
2953 && (r_type ==R_ARM_THM_CALL))
2954 /* V5T and above. Stub starts with ARM code, so
2955 we must be able to switch mode before
2956 reaching it, which is only possible for 'bl'
2957 (ie R_ARM_THM_CALL relocation). */
2958 ? arm_stub_long_branch_any_thumb_pic
2959 /* On V4T, use Thumb code only. */
2960 : arm_stub_long_branch_v4t_thumb_thumb_pic)
2961
2962 /* non-PIC stubs. */
2963 : ((globals->use_blx
2964 && (r_type ==R_ARM_THM_CALL))
2965 /* V5T and above. */
2966 ? arm_stub_long_branch_any_any
2967 /* V4T. */
2968 : arm_stub_long_branch_v4t_thumb_thumb);
2969 }
2970 else
2971 {
2972 stub_type = (info->shared | globals->pic_veneer)
2973 /* PIC stub. */
2974 ? arm_stub_long_branch_thumb_only_pic
2975 /* non-PIC stub. */
2976 : arm_stub_long_branch_thumb_only;
2977 }
2978 }
2979 else
2980 {
2981 /* Thumb to arm. */
2982 if (sym_sec != NULL
2983 && sym_sec->owner != NULL
2984 && !INTERWORK_FLAG (sym_sec->owner))
2985 {
2986 (*_bfd_error_handler)
2987 (_("%B(%s): warning: interworking not enabled.\n"
2988 " first occurrence: %B: Thumb call to ARM"),
2989 sym_sec->owner, input_bfd, name);
2990 }
2991
2992 stub_type = (info->shared | globals->pic_veneer)
2993 /* PIC stubs. */
2994 ? ((globals->use_blx
2995 && (r_type ==R_ARM_THM_CALL))
2996 /* V5T and above. */
2997 ? arm_stub_long_branch_any_arm_pic
2998 /* V4T PIC stub. */
2999 : arm_stub_long_branch_v4t_thumb_arm_pic)
3000
3001 /* non-PIC stubs. */
3002 : ((globals->use_blx
3003 && (r_type ==R_ARM_THM_CALL))
3004 /* V5T and above. */
3005 ? arm_stub_long_branch_any_any
3006 /* V4T. */
3007 : arm_stub_long_branch_v4t_thumb_arm);
3008
3009 /* Handle v4t short branches. */
3010 if ((stub_type == arm_stub_long_branch_v4t_thumb_arm)
3011 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
3012 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
3013 stub_type = arm_stub_short_branch_v4t_thumb_arm;
3014 }
3015 }
3016 }
3017 else if (r_type == R_ARM_CALL || r_type == R_ARM_JUMP24 || r_type == R_ARM_PLT32)
3018 {
3019 if (st_type == STT_ARM_TFUNC)
3020 {
3021 /* Arm to thumb. */
3022
3023 if (sym_sec != NULL
3024 && sym_sec->owner != NULL
3025 && !INTERWORK_FLAG (sym_sec->owner))
3026 {
3027 (*_bfd_error_handler)
3028 (_("%B(%s): warning: interworking not enabled.\n"
3029 " first occurrence: %B: ARM call to Thumb"),
3030 sym_sec->owner, input_bfd, name);
3031 }
3032
3033 /* We have an extra 2-bytes reach because of
3034 the mode change (bit 24 (H) of BLX encoding). */
3035 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
3036 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
3037 || ((r_type == R_ARM_CALL) && !globals->use_blx)
3038 || (r_type == R_ARM_JUMP24)
3039 || (r_type == R_ARM_PLT32))
3040 {
3041 stub_type = (info->shared | globals->pic_veneer)
3042 /* PIC stubs. */
3043 ? ((globals->use_blx)
3044 /* V5T and above. */
3045 ? arm_stub_long_branch_any_thumb_pic
3046 /* V4T stub. */
3047 : arm_stub_long_branch_v4t_arm_thumb_pic)
3048
3049 /* non-PIC stubs. */
3050 : ((globals->use_blx)
3051 /* V5T and above. */
3052 ? arm_stub_long_branch_any_any
3053 /* V4T. */
3054 : arm_stub_long_branch_v4t_arm_thumb);
3055 }
3056 }
3057 else
3058 {
3059 /* Arm to arm. */
3060 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
3061 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
3062 {
3063 stub_type = (info->shared | globals->pic_veneer)
3064 /* PIC stubs. */
3065 ? arm_stub_long_branch_any_arm_pic
3066 /* non-PIC stubs. */
3067 : arm_stub_long_branch_any_any;
3068 }
3069 }
3070 }
3071
3072 return stub_type;
3073 }
3074
3075 /* Build a name for an entry in the stub hash table. */
3076
3077 static char *
3078 elf32_arm_stub_name (const asection *input_section,
3079 const asection *sym_sec,
3080 const struct elf32_arm_link_hash_entry *hash,
3081 const Elf_Internal_Rela *rel)
3082 {
3083 char *stub_name;
3084 bfd_size_type len;
3085
3086 if (hash)
3087 {
3088 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1;
3089 stub_name = bfd_malloc (len);
3090 if (stub_name != NULL)
3091 sprintf (stub_name, "%08x_%s+%x",
3092 input_section->id & 0xffffffff,
3093 hash->root.root.root.string,
3094 (int) rel->r_addend & 0xffffffff);
3095 }
3096 else
3097 {
3098 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3099 stub_name = bfd_malloc (len);
3100 if (stub_name != NULL)
3101 sprintf (stub_name, "%08x_%x:%x+%x",
3102 input_section->id & 0xffffffff,
3103 sym_sec->id & 0xffffffff,
3104 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
3105 (int) rel->r_addend & 0xffffffff);
3106 }
3107
3108 return stub_name;
3109 }
3110
3111 /* Look up an entry in the stub hash. Stub entries are cached because
3112 creating the stub name takes a bit of time. */
3113
3114 static struct elf32_arm_stub_hash_entry *
3115 elf32_arm_get_stub_entry (const asection *input_section,
3116 const asection *sym_sec,
3117 struct elf_link_hash_entry *hash,
3118 const Elf_Internal_Rela *rel,
3119 struct elf32_arm_link_hash_table *htab)
3120 {
3121 struct elf32_arm_stub_hash_entry *stub_entry;
3122 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
3123 const asection *id_sec;
3124
3125 if ((input_section->flags & SEC_CODE) == 0)
3126 return NULL;
3127
3128 /* If this input section is part of a group of sections sharing one
3129 stub section, then use the id of the first section in the group.
3130 Stub names need to include a section id, as there may well be
3131 more than one stub used to reach say, printf, and we need to
3132 distinguish between them. */
3133 id_sec = htab->stub_group[input_section->id].link_sec;
3134
3135 if (h != NULL && h->stub_cache != NULL
3136 && h->stub_cache->h == h
3137 && h->stub_cache->id_sec == id_sec)
3138 {
3139 stub_entry = h->stub_cache;
3140 }
3141 else
3142 {
3143 char *stub_name;
3144
3145 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel);
3146 if (stub_name == NULL)
3147 return NULL;
3148
3149 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
3150 stub_name, FALSE, FALSE);
3151 if (h != NULL)
3152 h->stub_cache = stub_entry;
3153
3154 free (stub_name);
3155 }
3156
3157 return stub_entry;
3158 }
3159
3160 /* Add a new stub entry to the stub hash. Not all fields of the new
3161 stub entry are initialised. */
3162
3163 static struct elf32_arm_stub_hash_entry *
3164 elf32_arm_add_stub (const char *stub_name,
3165 asection *section,
3166 struct elf32_arm_link_hash_table *htab)
3167 {
3168 asection *link_sec;
3169 asection *stub_sec;
3170 struct elf32_arm_stub_hash_entry *stub_entry;
3171
3172 link_sec = htab->stub_group[section->id].link_sec;
3173 stub_sec = htab->stub_group[section->id].stub_sec;
3174 if (stub_sec == NULL)
3175 {
3176 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3177 if (stub_sec == NULL)
3178 {
3179 size_t namelen;
3180 bfd_size_type len;
3181 char *s_name;
3182
3183 namelen = strlen (link_sec->name);
3184 len = namelen + sizeof (STUB_SUFFIX);
3185 s_name = bfd_alloc (htab->stub_bfd, len);
3186 if (s_name == NULL)
3187 return NULL;
3188
3189 memcpy (s_name, link_sec->name, namelen);
3190 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3191 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3192 if (stub_sec == NULL)
3193 return NULL;
3194 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3195 }
3196 htab->stub_group[section->id].stub_sec = stub_sec;
3197 }
3198
3199 /* Enter this entry into the linker stub hash table. */
3200 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3201 TRUE, FALSE);
3202 if (stub_entry == NULL)
3203 {
3204 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3205 section->owner,
3206 stub_name);
3207 return NULL;
3208 }
3209
3210 stub_entry->stub_sec = stub_sec;
3211 stub_entry->stub_offset = 0;
3212 stub_entry->id_sec = link_sec;
3213
3214 return stub_entry;
3215 }
3216
3217 /* Store an Arm insn into an output section not processed by
3218 elf32_arm_write_section. */
3219
3220 static void
3221 put_arm_insn (struct elf32_arm_link_hash_table * htab,
3222 bfd * output_bfd, bfd_vma val, void * ptr)
3223 {
3224 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3225 bfd_putl32 (val, ptr);
3226 else
3227 bfd_putb32 (val, ptr);
3228 }
3229
3230 /* Store a 16-bit Thumb insn into an output section not processed by
3231 elf32_arm_write_section. */
3232
3233 static void
3234 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
3235 bfd * output_bfd, bfd_vma val, void * ptr)
3236 {
3237 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3238 bfd_putl16 (val, ptr);
3239 else
3240 bfd_putb16 (val, ptr);
3241 }
3242
3243 static bfd_boolean
3244 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
3245 void * in_arg)
3246 {
3247 struct elf32_arm_stub_hash_entry *stub_entry;
3248 struct bfd_link_info *info;
3249 struct elf32_arm_link_hash_table *htab;
3250 asection *stub_sec;
3251 bfd *stub_bfd;
3252 bfd_vma stub_addr;
3253 bfd_byte *loc;
3254 bfd_vma sym_value;
3255 int template_size;
3256 int size;
3257 const insn_sequence *template;
3258 int i;
3259 struct elf32_arm_link_hash_table * globals;
3260 int stub_reloc_idx = -1;
3261 int stub_reloc_offset = 0;
3262
3263 /* Massage our args to the form they really have. */
3264 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3265 info = (struct bfd_link_info *) in_arg;
3266
3267 globals = elf32_arm_hash_table (info);
3268
3269 htab = elf32_arm_hash_table (info);
3270 stub_sec = stub_entry->stub_sec;
3271
3272 /* Make a note of the offset within the stubs for this entry. */
3273 stub_entry->stub_offset = stub_sec->size;
3274 loc = stub_sec->contents + stub_entry->stub_offset;
3275
3276 stub_bfd = stub_sec->owner;
3277
3278 /* This is the address of the start of the stub. */
3279 stub_addr = stub_sec->output_section->vma + stub_sec->output_offset
3280 + stub_entry->stub_offset;
3281
3282 /* This is the address of the stub destination. */
3283 sym_value = (stub_entry->target_value
3284 + stub_entry->target_section->output_offset
3285 + stub_entry->target_section->output_section->vma);
3286
3287 template = stub_entry->stub_template;
3288 template_size = stub_entry->stub_template_size;
3289
3290 size = 0;
3291 for (i = 0; i < template_size; i++)
3292 {
3293 switch (template[i].type)
3294 {
3295 case THUMB16_TYPE:
3296 put_thumb_insn (globals, stub_bfd, template[i].data, loc + size);
3297 size += 2;
3298 break;
3299
3300 case ARM_TYPE:
3301 put_arm_insn (globals, stub_bfd, template[i].data, loc + size);
3302 /* Handle cases where the target is encoded within the
3303 instruction. */
3304 if (template[i].r_type == R_ARM_JUMP24)
3305 {
3306 stub_reloc_idx = i;
3307 stub_reloc_offset = size;
3308 }
3309 size += 4;
3310 break;
3311
3312 case DATA_TYPE:
3313 bfd_put_32 (stub_bfd, template[i].data, loc + size);
3314 stub_reloc_idx = i;
3315 stub_reloc_offset = size;
3316 size += 4;
3317 break;
3318
3319 default:
3320 BFD_FAIL ();
3321 return FALSE;
3322 }
3323 }
3324
3325 stub_sec->size += size;
3326
3327 /* Stub size has already been computed in arm_size_one_stub. Check
3328 consistency. */
3329 BFD_ASSERT (size == stub_entry->stub_size);
3330
3331 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3332 if (stub_entry->st_type == STT_ARM_TFUNC)
3333 sym_value |= 1;
3334
3335 /* Assume there is one and only one entry to relocate in each stub. */
3336 BFD_ASSERT (stub_reloc_idx != -1);
3337
3338 _bfd_final_link_relocate (elf32_arm_howto_from_type (template[stub_reloc_idx].r_type),
3339 stub_bfd, stub_sec, stub_sec->contents,
3340 stub_entry->stub_offset + stub_reloc_offset,
3341 sym_value, template[stub_reloc_idx].reloc_addend);
3342
3343 return TRUE;
3344 }
3345
3346 /* As above, but don't actually build the stub. Just bump offset so
3347 we know stub section sizes. */
3348
3349 static bfd_boolean
3350 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
3351 void * in_arg)
3352 {
3353 struct elf32_arm_stub_hash_entry *stub_entry;
3354 struct elf32_arm_link_hash_table *htab;
3355 const insn_sequence *template;
3356 int template_size;
3357 int size;
3358 int i;
3359
3360 /* Massage our args to the form they really have. */
3361 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3362 htab = (struct elf32_arm_link_hash_table *) in_arg;
3363
3364 switch (stub_entry->stub_type)
3365 {
3366 case arm_stub_long_branch_any_any:
3367 template = elf32_arm_stub_long_branch_any_any;
3368 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_any_any);
3369 break;
3370 case arm_stub_long_branch_v4t_arm_thumb:
3371 template = elf32_arm_stub_long_branch_v4t_arm_thumb;
3372 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_v4t_arm_thumb);
3373 break;
3374 case arm_stub_long_branch_thumb_only:
3375 template = elf32_arm_stub_long_branch_thumb_only;
3376 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_thumb_only);
3377 break;
3378 case arm_stub_long_branch_v4t_thumb_thumb:
3379 template = elf32_arm_stub_long_branch_v4t_thumb_thumb;
3380 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_v4t_thumb_thumb);
3381 break;
3382 case arm_stub_long_branch_v4t_thumb_arm:
3383 template = elf32_arm_stub_long_branch_v4t_thumb_arm;
3384 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_v4t_thumb_arm);
3385 break;
3386 case arm_stub_short_branch_v4t_thumb_arm:
3387 template = elf32_arm_stub_short_branch_v4t_thumb_arm;
3388 template_size = ARRAY_SIZE (elf32_arm_stub_short_branch_v4t_thumb_arm);
3389 break;
3390 case arm_stub_long_branch_any_arm_pic:
3391 template = elf32_arm_stub_long_branch_any_arm_pic;
3392 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_any_arm_pic);
3393 break;
3394 case arm_stub_long_branch_any_thumb_pic:
3395 template = elf32_arm_stub_long_branch_any_thumb_pic;
3396 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_any_thumb_pic);
3397 break;
3398 case arm_stub_long_branch_v4t_arm_thumb_pic:
3399 template = elf32_arm_stub_long_branch_v4t_arm_thumb_pic;
3400 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_v4t_arm_thumb_pic);
3401 break;
3402 case arm_stub_long_branch_v4t_thumb_arm_pic:
3403 template = elf32_arm_stub_long_branch_v4t_thumb_arm_pic;
3404 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_v4t_thumb_arm_pic);
3405 break;
3406 case arm_stub_long_branch_thumb_only_pic:
3407 template = elf32_arm_stub_long_branch_thumb_only_pic;
3408 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_thumb_only_pic);
3409 break;
3410 case arm_stub_long_branch_v4t_thumb_thumb_pic:
3411 template = elf32_arm_stub_long_branch_v4t_thumb_thumb_pic;
3412 template_size = ARRAY_SIZE (elf32_arm_stub_long_branch_v4t_thumb_thumb_pic);
3413 break;
3414 default:
3415 BFD_FAIL ();
3416 return FALSE;
3417 }
3418
3419 size = 0;
3420 for (i = 0; i < template_size; i++)
3421 {
3422 switch (template[i].type)
3423 {
3424 case THUMB16_TYPE:
3425 size += 2;
3426 break;
3427
3428 case ARM_TYPE:
3429 size += 4;
3430 break;
3431
3432 case DATA_TYPE:
3433 size += 4;
3434 break;
3435
3436 default:
3437 BFD_FAIL ();
3438 return FALSE;
3439 }
3440 }
3441
3442 stub_entry->stub_size = size;
3443 stub_entry->stub_template = template;
3444 stub_entry->stub_template_size = template_size;
3445
3446 size = (size + 7) & ~7;
3447 stub_entry->stub_sec->size += size;
3448
3449 return TRUE;
3450 }
3451
3452 /* External entry points for sizing and building linker stubs. */
3453
3454 /* Set up various things so that we can make a list of input sections
3455 for each output section included in the link. Returns -1 on error,
3456 0 when no stubs will be needed, and 1 on success. */
3457
3458 int
3459 elf32_arm_setup_section_lists (bfd *output_bfd,
3460 struct bfd_link_info *info)
3461 {
3462 bfd *input_bfd;
3463 unsigned int bfd_count;
3464 int top_id, top_index;
3465 asection *section;
3466 asection **input_list, **list;
3467 bfd_size_type amt;
3468 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3469
3470 if (! is_elf_hash_table (htab))
3471 return 0;
3472
3473 /* Count the number of input BFDs and find the top input section id. */
3474 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3475 input_bfd != NULL;
3476 input_bfd = input_bfd->link_next)
3477 {
3478 bfd_count += 1;
3479 for (section = input_bfd->sections;
3480 section != NULL;
3481 section = section->next)
3482 {
3483 if (top_id < section->id)
3484 top_id = section->id;
3485 }
3486 }
3487 htab->bfd_count = bfd_count;
3488
3489 amt = sizeof (struct map_stub) * (top_id + 1);
3490 htab->stub_group = bfd_zmalloc (amt);
3491 if (htab->stub_group == NULL)
3492 return -1;
3493
3494 /* We can't use output_bfd->section_count here to find the top output
3495 section index as some sections may have been removed, and
3496 _bfd_strip_section_from_output doesn't renumber the indices. */
3497 for (section = output_bfd->sections, top_index = 0;
3498 section != NULL;
3499 section = section->next)
3500 {
3501 if (top_index < section->index)
3502 top_index = section->index;
3503 }
3504
3505 htab->top_index = top_index;
3506 amt = sizeof (asection *) * (top_index + 1);
3507 input_list = bfd_malloc (amt);
3508 htab->input_list = input_list;
3509 if (input_list == NULL)
3510 return -1;
3511
3512 /* For sections we aren't interested in, mark their entries with a
3513 value we can check later. */
3514 list = input_list + top_index;
3515 do
3516 *list = bfd_abs_section_ptr;
3517 while (list-- != input_list);
3518
3519 for (section = output_bfd->sections;
3520 section != NULL;
3521 section = section->next)
3522 {
3523 if ((section->flags & SEC_CODE) != 0)
3524 input_list[section->index] = NULL;
3525 }
3526
3527 return 1;
3528 }
3529
3530 /* The linker repeatedly calls this function for each input section,
3531 in the order that input sections are linked into output sections.
3532 Build lists of input sections to determine groupings between which
3533 we may insert linker stubs. */
3534
3535 void
3536 elf32_arm_next_input_section (struct bfd_link_info *info,
3537 asection *isec)
3538 {
3539 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3540
3541 if (isec->output_section->index <= htab->top_index)
3542 {
3543 asection **list = htab->input_list + isec->output_section->index;
3544
3545 if (*list != bfd_abs_section_ptr)
3546 {
3547 /* Steal the link_sec pointer for our list. */
3548 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3549 /* This happens to make the list in reverse order,
3550 which we reverse later. */
3551 PREV_SEC (isec) = *list;
3552 *list = isec;
3553 }
3554 }
3555 }
3556
3557 /* See whether we can group stub sections together. Grouping stub
3558 sections may result in fewer stubs. More importantly, we need to
3559 put all .init* and .fini* stubs at the end of the .init or
3560 .fini output sections respectively, because glibc splits the
3561 _init and _fini functions into multiple parts. Putting a stub in
3562 the middle of a function is not a good idea. */
3563
3564 static void
3565 group_sections (struct elf32_arm_link_hash_table *htab,
3566 bfd_size_type stub_group_size,
3567 bfd_boolean stubs_always_after_branch)
3568 {
3569 asection **list = htab->input_list;
3570
3571 do
3572 {
3573 asection *tail = *list;
3574 asection *head;
3575
3576 if (tail == bfd_abs_section_ptr)
3577 continue;
3578
3579 /* Reverse the list: we must avoid placing stubs at the
3580 beginning of the section because the beginning of the text
3581 section may be required for an interrupt vector in bare metal
3582 code. */
3583 #define NEXT_SEC PREV_SEC
3584 head = NULL;
3585 while (tail != NULL)
3586 {
3587 /* Pop from tail. */
3588 asection *item = tail;
3589 tail = PREV_SEC (item);
3590
3591 /* Push on head. */
3592 NEXT_SEC (item) = head;
3593 head = item;
3594 }
3595
3596 while (head != NULL)
3597 {
3598 asection *curr;
3599 asection *next;
3600 bfd_vma stub_group_start = head->output_offset;
3601 bfd_vma end_of_next;
3602
3603 curr = head;
3604 while (NEXT_SEC (curr) != NULL)
3605 {
3606 next = NEXT_SEC (curr);
3607 end_of_next = next->output_offset + next->size;
3608 if (end_of_next - stub_group_start >= stub_group_size)
3609 /* End of NEXT is too far from start, so stop. */
3610 break;
3611 /* Add NEXT to the group. */
3612 curr = next;
3613 }
3614
3615 /* OK, the size from the start to the start of CURR is less
3616 than stub_group_size and thus can be handled by one stub
3617 section. (Or the head section is itself larger than
3618 stub_group_size, in which case we may be toast.)
3619 We should really be keeping track of the total size of
3620 stubs added here, as stubs contribute to the final output
3621 section size. */
3622 do
3623 {
3624 next = NEXT_SEC (head);
3625 /* Set up this stub group. */
3626 htab->stub_group[head->id].link_sec = curr;
3627 }
3628 while (head != curr && (head = next) != NULL);
3629
3630 /* But wait, there's more! Input sections up to stub_group_size
3631 bytes after the stub section can be handled by it too. */
3632 if (!stubs_always_after_branch)
3633 {
3634 stub_group_start = curr->output_offset + curr->size;
3635
3636 while (next != NULL)
3637 {
3638 end_of_next = next->output_offset + next->size;
3639 if (end_of_next - stub_group_start >= stub_group_size)
3640 /* End of NEXT is too far from stubs, so stop. */
3641 break;
3642 /* Add NEXT to the stub group. */
3643 head = next;
3644 next = NEXT_SEC (head);
3645 htab->stub_group[head->id].link_sec = curr;
3646 }
3647 }
3648 head = next;
3649 }
3650 }
3651 while (list++ != htab->input_list + htab->top_index);
3652
3653 free (htab->input_list);
3654 #undef PREV_SEC
3655 #undef NEXT_SEC
3656 }
3657
3658 /* Determine and set the size of the stub section for a final link.
3659
3660 The basic idea here is to examine all the relocations looking for
3661 PC-relative calls to a target that is unreachable with a "bl"
3662 instruction. */
3663
3664 bfd_boolean
3665 elf32_arm_size_stubs (bfd *output_bfd,
3666 bfd *stub_bfd,
3667 struct bfd_link_info *info,
3668 bfd_signed_vma group_size,
3669 asection * (*add_stub_section) (const char *, asection *),
3670 void (*layout_sections_again) (void))
3671 {
3672 bfd_size_type stub_group_size;
3673 bfd_boolean stubs_always_after_branch;
3674 bfd_boolean stub_changed = 0;
3675 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3676
3677 /* Propagate mach to stub bfd, because it may not have been
3678 finalized when we created stub_bfd. */
3679 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3680 bfd_get_mach (output_bfd));
3681
3682 /* Stash our params away. */
3683 htab->stub_bfd = stub_bfd;
3684 htab->add_stub_section = add_stub_section;
3685 htab->layout_sections_again = layout_sections_again;
3686 stubs_always_after_branch = group_size < 0;
3687 if (group_size < 0)
3688 stub_group_size = -group_size;
3689 else
3690 stub_group_size = group_size;
3691
3692 if (stub_group_size == 1)
3693 {
3694 /* Default values. */
3695 /* Thumb branch range is +-4MB has to be used as the default
3696 maximum size (a given section can contain both ARM and Thumb
3697 code, so the worst case has to be taken into account).
3698
3699 This value is 24K less than that, which allows for 2025
3700 12-byte stubs. If we exceed that, then we will fail to link.
3701 The user will have to relink with an explicit group size
3702 option. */
3703 stub_group_size = 4170000;
3704 }
3705
3706 group_sections (htab, stub_group_size, stubs_always_after_branch);
3707
3708 while (1)
3709 {
3710 bfd *input_bfd;
3711 unsigned int bfd_indx;
3712 asection *stub_sec;
3713
3714 for (input_bfd = info->input_bfds, bfd_indx = 0;
3715 input_bfd != NULL;
3716 input_bfd = input_bfd->link_next, bfd_indx++)
3717 {
3718 Elf_Internal_Shdr *symtab_hdr;
3719 asection *section;
3720 Elf_Internal_Sym *local_syms = NULL;
3721
3722 /* We'll need the symbol table in a second. */
3723 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3724 if (symtab_hdr->sh_info == 0)
3725 continue;
3726
3727 /* Walk over each section attached to the input bfd. */
3728 for (section = input_bfd->sections;
3729 section != NULL;
3730 section = section->next)
3731 {
3732 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3733
3734 /* If there aren't any relocs, then there's nothing more
3735 to do. */
3736 if ((section->flags & SEC_RELOC) == 0
3737 || section->reloc_count == 0
3738 || (section->flags & SEC_CODE) == 0)
3739 continue;
3740
3741 /* If this section is a link-once section that will be
3742 discarded, then don't create any stubs. */
3743 if (section->output_section == NULL
3744 || section->output_section->owner != output_bfd)
3745 continue;
3746
3747 /* Get the relocs. */
3748 internal_relocs
3749 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3750 NULL, info->keep_memory);
3751 if (internal_relocs == NULL)
3752 goto error_ret_free_local;
3753
3754 /* Now examine each relocation. */
3755 irela = internal_relocs;
3756 irelaend = irela + section->reloc_count;
3757 for (; irela < irelaend; irela++)
3758 {
3759 unsigned int r_type, r_indx;
3760 enum elf32_arm_stub_type stub_type;
3761 struct elf32_arm_stub_hash_entry *stub_entry;
3762 asection *sym_sec;
3763 bfd_vma sym_value;
3764 bfd_vma destination;
3765 struct elf32_arm_link_hash_entry *hash;
3766 const char *sym_name;
3767 char *stub_name;
3768 const asection *id_sec;
3769 unsigned char st_type;
3770
3771 r_type = ELF32_R_TYPE (irela->r_info);
3772 r_indx = ELF32_R_SYM (irela->r_info);
3773
3774 if (r_type >= (unsigned int) R_ARM_max)
3775 {
3776 bfd_set_error (bfd_error_bad_value);
3777 error_ret_free_internal:
3778 if (elf_section_data (section)->relocs == NULL)
3779 free (internal_relocs);
3780 goto error_ret_free_local;
3781 }
3782
3783 /* Only look for stubs on branch instructions. */
3784 if ((r_type != (unsigned int) R_ARM_CALL)
3785 && (r_type != (unsigned int) R_ARM_THM_CALL)
3786 && (r_type != (unsigned int) R_ARM_JUMP24)
3787 && (r_type != (unsigned int) R_ARM_THM_JUMP24)
3788 && (r_type != (unsigned int) R_ARM_PLT32))
3789 continue;
3790
3791 /* Now determine the call target, its name, value,
3792 section. */
3793 sym_sec = NULL;
3794 sym_value = 0;
3795 destination = 0;
3796 hash = NULL;
3797 sym_name = NULL;
3798 if (r_indx < symtab_hdr->sh_info)
3799 {
3800 /* It's a local symbol. */
3801 Elf_Internal_Sym *sym;
3802 Elf_Internal_Shdr *hdr;
3803
3804 if (local_syms == NULL)
3805 {
3806 local_syms
3807 = (Elf_Internal_Sym *) symtab_hdr->contents;
3808 if (local_syms == NULL)
3809 local_syms
3810 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3811 symtab_hdr->sh_info, 0,
3812 NULL, NULL, NULL);
3813 if (local_syms == NULL)
3814 goto error_ret_free_internal;
3815 }
3816
3817 sym = local_syms + r_indx;
3818 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3819 sym_sec = hdr->bfd_section;
3820 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3821 sym_value = sym->st_value;
3822 destination = (sym_value + irela->r_addend
3823 + sym_sec->output_offset
3824 + sym_sec->output_section->vma);
3825 st_type = ELF_ST_TYPE (sym->st_info);
3826 sym_name
3827 = bfd_elf_string_from_elf_section (input_bfd,
3828 symtab_hdr->sh_link,
3829 sym->st_name);
3830 }
3831 else
3832 {
3833 /* It's an external symbol. */
3834 int e_indx;
3835
3836 e_indx = r_indx - symtab_hdr->sh_info;
3837 hash = ((struct elf32_arm_link_hash_entry *)
3838 elf_sym_hashes (input_bfd)[e_indx]);
3839
3840 while (hash->root.root.type == bfd_link_hash_indirect
3841 || hash->root.root.type == bfd_link_hash_warning)
3842 hash = ((struct elf32_arm_link_hash_entry *)
3843 hash->root.root.u.i.link);
3844
3845 if (hash->root.root.type == bfd_link_hash_defined
3846 || hash->root.root.type == bfd_link_hash_defweak)
3847 {
3848 sym_sec = hash->root.root.u.def.section;
3849 sym_value = hash->root.root.u.def.value;
3850 if (sym_sec->output_section != NULL)
3851 destination = (sym_value + irela->r_addend
3852 + sym_sec->output_offset
3853 + sym_sec->output_section->vma);
3854 }
3855 else if ((hash->root.root.type == bfd_link_hash_undefined)
3856 || (hash->root.root.type == bfd_link_hash_undefweak))
3857 {
3858 /* For a shared library, use the PLT stub as
3859 target address to decide whether a long
3860 branch stub is needed.
3861 For absolute code, they cannot be handled. */
3862 struct elf32_arm_link_hash_table *globals =
3863 elf32_arm_hash_table (info);
3864
3865 if (globals->splt != NULL && hash != NULL
3866 && hash->root.plt.offset != (bfd_vma) -1)
3867 {
3868 sym_sec = globals->splt;
3869 sym_value = hash->root.plt.offset;
3870 if (sym_sec->output_section != NULL)
3871 destination = (sym_value
3872 + sym_sec->output_offset
3873 + sym_sec->output_section->vma);
3874 }
3875 else
3876 continue;
3877 }
3878 else
3879 {
3880 bfd_set_error (bfd_error_bad_value);
3881 goto error_ret_free_internal;
3882 }
3883 st_type = ELF_ST_TYPE (hash->root.type);
3884 sym_name = hash->root.root.root.string;
3885 }
3886
3887 /* Determine what (if any) linker stub is needed. */
3888 stub_type = arm_type_of_stub (info, section, irela, st_type,
3889 hash, destination, sym_sec,
3890 input_bfd, sym_name);
3891 if (stub_type == arm_stub_none)
3892 continue;
3893
3894 /* Support for grouping stub sections. */
3895 id_sec = htab->stub_group[section->id].link_sec;
3896
3897 /* Get the name of this stub. */
3898 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, irela);
3899 if (!stub_name)
3900 goto error_ret_free_internal;
3901
3902 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
3903 stub_name,
3904 FALSE, FALSE);
3905 if (stub_entry != NULL)
3906 {
3907 /* The proper stub has already been created. */
3908 free (stub_name);
3909 continue;
3910 }
3911
3912 stub_entry = elf32_arm_add_stub (stub_name, section, htab);
3913 if (stub_entry == NULL)
3914 {
3915 free (stub_name);
3916 goto error_ret_free_internal;
3917 }
3918
3919 stub_entry->target_value = sym_value;
3920 stub_entry->target_section = sym_sec;
3921 stub_entry->stub_type = stub_type;
3922 stub_entry->h = hash;
3923 stub_entry->st_type = st_type;
3924
3925 if (sym_name == NULL)
3926 sym_name = "unnamed";
3927 stub_entry->output_name
3928 = bfd_alloc (htab->stub_bfd,
3929 sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
3930 + strlen (sym_name));
3931 if (stub_entry->output_name == NULL)
3932 {
3933 free (stub_name);
3934 goto error_ret_free_internal;
3935 }
3936
3937 /* For historical reasons, use the existing names for
3938 ARM-to-Thumb and Thumb-to-ARM stubs. */
3939 if ( ((r_type == (unsigned int) R_ARM_THM_CALL)
3940 || (r_type == (unsigned int) R_ARM_THM_JUMP24))
3941 && st_type != STT_ARM_TFUNC)
3942 sprintf (stub_entry->output_name, THUMB2ARM_GLUE_ENTRY_NAME,
3943 sym_name);
3944 else if ( ((r_type == (unsigned int) R_ARM_CALL)
3945 || (r_type == (unsigned int) R_ARM_JUMP24))
3946 && st_type == STT_ARM_TFUNC)
3947 sprintf (stub_entry->output_name, ARM2THUMB_GLUE_ENTRY_NAME,
3948 sym_name);
3949 else
3950 sprintf (stub_entry->output_name, STUB_ENTRY_NAME,
3951 sym_name);
3952
3953 stub_changed = TRUE;
3954 }
3955
3956 /* We're done with the internal relocs, free them. */
3957 if (elf_section_data (section)->relocs == NULL)
3958 free (internal_relocs);
3959 }
3960 }
3961
3962 if (!stub_changed)
3963 break;
3964
3965 /* OK, we've added some stubs. Find out the new size of the
3966 stub sections. */
3967 for (stub_sec = htab->stub_bfd->sections;
3968 stub_sec != NULL;
3969 stub_sec = stub_sec->next)
3970 {
3971 /* Ignore non-stub sections. */
3972 if (!strstr (stub_sec->name, STUB_SUFFIX))
3973 continue;
3974
3975 stub_sec->size = 0;
3976 }
3977
3978 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
3979
3980 /* Ask the linker to do its stuff. */
3981 (*htab->layout_sections_again) ();
3982 stub_changed = FALSE;
3983 }
3984
3985 return TRUE;
3986
3987 error_ret_free_local:
3988 return FALSE;
3989 }
3990
3991 /* Build all the stubs associated with the current output file. The
3992 stubs are kept in a hash table attached to the main linker hash
3993 table. We also set up the .plt entries for statically linked PIC
3994 functions here. This function is called via arm_elf_finish in the
3995 linker. */
3996
3997 bfd_boolean
3998 elf32_arm_build_stubs (struct bfd_link_info *info)
3999 {
4000 asection *stub_sec;
4001 struct bfd_hash_table *table;
4002 struct elf32_arm_link_hash_table *htab;
4003
4004 htab = elf32_arm_hash_table (info);
4005
4006 for (stub_sec = htab->stub_bfd->sections;
4007 stub_sec != NULL;
4008 stub_sec = stub_sec->next)
4009 {
4010 bfd_size_type size;
4011
4012 /* Ignore non-stub sections. */
4013 if (!strstr (stub_sec->name, STUB_SUFFIX))
4014 continue;
4015
4016 /* Allocate memory to hold the linker stubs. */
4017 size = stub_sec->size;
4018 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4019 if (stub_sec->contents == NULL && size != 0)
4020 return FALSE;
4021 stub_sec->size = 0;
4022 }
4023
4024 /* Build the stubs as directed by the stub hash table. */
4025 table = &htab->stub_hash_table;
4026 bfd_hash_traverse (table, arm_build_one_stub, info);
4027
4028 return TRUE;
4029 }
4030
4031 /* Locate the Thumb encoded calling stub for NAME. */
4032
4033 static struct elf_link_hash_entry *
4034 find_thumb_glue (struct bfd_link_info *link_info,
4035 const char *name,
4036 char **error_message)
4037 {
4038 char *tmp_name;
4039 struct elf_link_hash_entry *hash;
4040 struct elf32_arm_link_hash_table *hash_table;
4041
4042 /* We need a pointer to the armelf specific hash table. */
4043 hash_table = elf32_arm_hash_table (link_info);
4044
4045 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4046 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
4047
4048 BFD_ASSERT (tmp_name);
4049
4050 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
4051
4052 hash = elf_link_hash_lookup
4053 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
4054
4055 if (hash == NULL
4056 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
4057 tmp_name, name) == -1)
4058 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
4059
4060 free (tmp_name);
4061
4062 return hash;
4063 }
4064
4065 /* Locate the ARM encoded calling stub for NAME. */
4066
4067 static struct elf_link_hash_entry *
4068 find_arm_glue (struct bfd_link_info *link_info,
4069 const char *name,
4070 char **error_message)
4071 {
4072 char *tmp_name;
4073 struct elf_link_hash_entry *myh;
4074 struct elf32_arm_link_hash_table *hash_table;
4075
4076 /* We need a pointer to the elfarm specific hash table. */
4077 hash_table = elf32_arm_hash_table (link_info);
4078
4079 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4080 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
4081
4082 BFD_ASSERT (tmp_name);
4083
4084 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
4085
4086 myh = elf_link_hash_lookup
4087 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
4088
4089 if (myh == NULL
4090 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
4091 tmp_name, name) == -1)
4092 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
4093
4094 free (tmp_name);
4095
4096 return myh;
4097 }
4098
4099 /* ARM->Thumb glue (static images):
4100
4101 .arm
4102 __func_from_arm:
4103 ldr r12, __func_addr
4104 bx r12
4105 __func_addr:
4106 .word func @ behave as if you saw a ARM_32 reloc.
4107
4108 (v5t static images)
4109 .arm
4110 __func_from_arm:
4111 ldr pc, __func_addr
4112 __func_addr:
4113 .word func @ behave as if you saw a ARM_32 reloc.
4114
4115 (relocatable images)
4116 .arm
4117 __func_from_arm:
4118 ldr r12, __func_offset
4119 add r12, r12, pc
4120 bx r12
4121 __func_offset:
4122 .word func - . */
4123
4124 #define ARM2THUMB_STATIC_GLUE_SIZE 12
4125 static const insn32 a2t1_ldr_insn = 0xe59fc000;
4126 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
4127 static const insn32 a2t3_func_addr_insn = 0x00000001;
4128
4129 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
4130 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
4131 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
4132
4133 #define ARM2THUMB_PIC_GLUE_SIZE 16
4134 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
4135 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
4136 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
4137
4138 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
4139
4140 .thumb .thumb
4141 .align 2 .align 2
4142 __func_from_thumb: __func_from_thumb:
4143 bx pc push {r6, lr}
4144 nop ldr r6, __func_addr
4145 .arm mov lr, pc
4146 b func bx r6
4147 .arm
4148 ;; back_to_thumb
4149 ldmia r13! {r6, lr}
4150 bx lr
4151 __func_addr:
4152 .word func */
4153
4154 #define THUMB2ARM_GLUE_SIZE 8
4155 static const insn16 t2a1_bx_pc_insn = 0x4778;
4156 static const insn16 t2a2_noop_insn = 0x46c0;
4157 static const insn32 t2a3_b_insn = 0xea000000;
4158
4159 #define VFP11_ERRATUM_VENEER_SIZE 8
4160
4161 #define ARM_BX_VENEER_SIZE 12
4162 static const insn32 armbx1_tst_insn = 0xe3100001;
4163 static const insn32 armbx2_moveq_insn = 0x01a0f000;
4164 static const insn32 armbx3_bx_insn = 0xe12fff10;
4165
4166 #ifndef ELFARM_NABI_C_INCLUDED
4167 static void
4168 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
4169 {
4170 asection * s;
4171 bfd_byte * contents;
4172
4173 if (size == 0)
4174 {
4175 /* Do not include empty glue sections in the output. */
4176 if (abfd != NULL)
4177 {
4178 s = bfd_get_section_by_name (abfd, name);
4179 if (s != NULL)
4180 s->flags |= SEC_EXCLUDE;
4181 }
4182 return;
4183 }
4184
4185 BFD_ASSERT (abfd != NULL);
4186
4187 s = bfd_get_section_by_name (abfd, name);
4188 BFD_ASSERT (s != NULL);
4189
4190 contents = bfd_alloc (abfd, size);
4191
4192 BFD_ASSERT (s->size == size);
4193 s->contents = contents;
4194 }
4195
4196 bfd_boolean
4197 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
4198 {
4199 struct elf32_arm_link_hash_table * globals;
4200
4201 globals = elf32_arm_hash_table (info);
4202 BFD_ASSERT (globals != NULL);
4203
4204 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
4205 globals->arm_glue_size,
4206 ARM2THUMB_GLUE_SECTION_NAME);
4207
4208 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
4209 globals->thumb_glue_size,
4210 THUMB2ARM_GLUE_SECTION_NAME);
4211
4212 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
4213 globals->vfp11_erratum_glue_size,
4214 VFP11_ERRATUM_VENEER_SECTION_NAME);
4215
4216 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
4217 globals->bx_glue_size,
4218 ARM_BX_GLUE_SECTION_NAME);
4219
4220 return TRUE;
4221 }
4222
4223 /* Allocate space and symbols for calling a Thumb function from Arm mode.
4224 returns the symbol identifying the stub. */
4225
4226 static struct elf_link_hash_entry *
4227 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
4228 struct elf_link_hash_entry * h)
4229 {
4230 const char * name = h->root.root.string;
4231 asection * s;
4232 char * tmp_name;
4233 struct elf_link_hash_entry * myh;
4234 struct bfd_link_hash_entry * bh;
4235 struct elf32_arm_link_hash_table * globals;
4236 bfd_vma val;
4237 bfd_size_type size;
4238
4239 globals = elf32_arm_hash_table (link_info);
4240
4241 BFD_ASSERT (globals != NULL);
4242 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4243
4244 s = bfd_get_section_by_name
4245 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
4246
4247 BFD_ASSERT (s != NULL);
4248
4249 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
4250
4251 BFD_ASSERT (tmp_name);
4252
4253 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
4254
4255 myh = elf_link_hash_lookup
4256 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
4257
4258 if (myh != NULL)
4259 {
4260 /* We've already seen this guy. */
4261 free (tmp_name);
4262 return myh;
4263 }
4264
4265 /* The only trick here is using hash_table->arm_glue_size as the value.
4266 Even though the section isn't allocated yet, this is where we will be
4267 putting it. The +1 on the value marks that the stub has not been
4268 output yet - not that it is a Thumb function. */
4269 bh = NULL;
4270 val = globals->arm_glue_size + 1;
4271 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4272 tmp_name, BSF_GLOBAL, s, val,
4273 NULL, TRUE, FALSE, &bh);
4274
4275 myh = (struct elf_link_hash_entry *) bh;
4276 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4277 myh->forced_local = 1;
4278
4279 free (tmp_name);
4280
4281 if (link_info->shared || globals->root.is_relocatable_executable
4282 || globals->pic_veneer)
4283 size = ARM2THUMB_PIC_GLUE_SIZE;
4284 else if (globals->use_blx)
4285 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
4286 else
4287 size = ARM2THUMB_STATIC_GLUE_SIZE;
4288
4289 s->size += size;
4290 globals->arm_glue_size += size;
4291
4292 return myh;
4293 }
4294
4295 /* Allocate space for ARMv4 BX veneers. */
4296
4297 static void
4298 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
4299 {
4300 asection * s;
4301 struct elf32_arm_link_hash_table *globals;
4302 char *tmp_name;
4303 struct elf_link_hash_entry *myh;
4304 struct bfd_link_hash_entry *bh;
4305 bfd_vma val;
4306
4307 /* BX PC does not need a veneer. */
4308 if (reg == 15)
4309 return;
4310
4311 globals = elf32_arm_hash_table (link_info);
4312
4313 BFD_ASSERT (globals != NULL);
4314 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4315
4316 /* Check if this veneer has already been allocated. */
4317 if (globals->bx_glue_offset[reg])
4318 return;
4319
4320 s = bfd_get_section_by_name
4321 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
4322
4323 BFD_ASSERT (s != NULL);
4324
4325 /* Add symbol for veneer. */
4326 tmp_name = bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
4327
4328 BFD_ASSERT (tmp_name);
4329
4330 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
4331
4332 myh = elf_link_hash_lookup
4333 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
4334
4335 BFD_ASSERT (myh == NULL);
4336
4337 bh = NULL;
4338 val = globals->bx_glue_size;
4339 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4340 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4341 NULL, TRUE, FALSE, &bh);
4342
4343 myh = (struct elf_link_hash_entry *) bh;
4344 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4345 myh->forced_local = 1;
4346
4347 s->size += ARM_BX_VENEER_SIZE;
4348 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
4349 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
4350 }
4351
4352
4353 /* Add an entry to the code/data map for section SEC. */
4354
4355 static void
4356 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
4357 {
4358 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
4359 unsigned int newidx;
4360
4361 if (sec_data->map == NULL)
4362 {
4363 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
4364 sec_data->mapcount = 0;
4365 sec_data->mapsize = 1;
4366 }
4367
4368 newidx = sec_data->mapcount++;
4369
4370 if (sec_data->mapcount > sec_data->mapsize)
4371 {
4372 sec_data->mapsize *= 2;
4373 sec_data->map = bfd_realloc_or_free (sec_data->map, sec_data->mapsize
4374 * sizeof (elf32_arm_section_map));
4375 }
4376
4377 if (sec_data->map)
4378 {
4379 sec_data->map[newidx].vma = vma;
4380 sec_data->map[newidx].type = type;
4381 }
4382 }
4383
4384
4385 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
4386 veneers are handled for now. */
4387
4388 static bfd_vma
4389 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
4390 elf32_vfp11_erratum_list *branch,
4391 bfd *branch_bfd,
4392 asection *branch_sec,
4393 unsigned int offset)
4394 {
4395 asection *s;
4396 struct elf32_arm_link_hash_table *hash_table;
4397 char *tmp_name;
4398 struct elf_link_hash_entry *myh;
4399 struct bfd_link_hash_entry *bh;
4400 bfd_vma val;
4401 struct _arm_elf_section_data *sec_data;
4402 int errcount;
4403 elf32_vfp11_erratum_list *newerr;
4404
4405 hash_table = elf32_arm_hash_table (link_info);
4406
4407 BFD_ASSERT (hash_table != NULL);
4408 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
4409
4410 s = bfd_get_section_by_name
4411 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
4412
4413 sec_data = elf32_arm_section_data (s);
4414
4415 BFD_ASSERT (s != NULL);
4416
4417 tmp_name = bfd_malloc ((bfd_size_type) strlen
4418 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
4419
4420 BFD_ASSERT (tmp_name);
4421
4422 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
4423 hash_table->num_vfp11_fixes);
4424
4425 myh = elf_link_hash_lookup
4426 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4427
4428 BFD_ASSERT (myh == NULL);
4429
4430 bh = NULL;
4431 val = hash_table->vfp11_erratum_glue_size;
4432 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4433 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4434 NULL, TRUE, FALSE, &bh);
4435
4436 myh = (struct elf_link_hash_entry *) bh;
4437 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4438 myh->forced_local = 1;
4439
4440 /* Link veneer back to calling location. */
4441 errcount = ++(sec_data->erratumcount);
4442 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
4443
4444 newerr->type = VFP11_ERRATUM_ARM_VENEER;
4445 newerr->vma = -1;
4446 newerr->u.v.branch = branch;
4447 newerr->u.v.id = hash_table->num_vfp11_fixes;
4448 branch->u.b.veneer = newerr;
4449
4450 newerr->next = sec_data->erratumlist;
4451 sec_data->erratumlist = newerr;
4452
4453 /* A symbol for the return from the veneer. */
4454 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
4455 hash_table->num_vfp11_fixes);
4456
4457 myh = elf_link_hash_lookup
4458 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4459
4460 if (myh != NULL)
4461 abort ();
4462
4463 bh = NULL;
4464 val = offset + 4;
4465 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
4466 branch_sec, val, NULL, TRUE, FALSE, &bh);
4467
4468 myh = (struct elf_link_hash_entry *) bh;
4469 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4470 myh->forced_local = 1;
4471
4472 free (tmp_name);
4473
4474 /* Generate a mapping symbol for the veneer section, and explicitly add an
4475 entry for that symbol to the code/data map for the section. */
4476 if (hash_table->vfp11_erratum_glue_size == 0)
4477 {
4478 bh = NULL;
4479 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
4480 ever requires this erratum fix. */
4481 _bfd_generic_link_add_one_symbol (link_info,
4482 hash_table->bfd_of_glue_owner, "$a",
4483 BSF_LOCAL, s, 0, NULL,
4484 TRUE, FALSE, &bh);
4485
4486 myh = (struct elf_link_hash_entry *) bh;
4487 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
4488 myh->forced_local = 1;
4489
4490 /* The elf32_arm_init_maps function only cares about symbols from input
4491 BFDs. We must make a note of this generated mapping symbol
4492 ourselves so that code byteswapping works properly in
4493 elf32_arm_write_section. */
4494 elf32_arm_section_map_add (s, 'a', 0);
4495 }
4496
4497 s->size += VFP11_ERRATUM_VENEER_SIZE;
4498 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
4499 hash_table->num_vfp11_fixes++;
4500
4501 /* The offset of the veneer. */
4502 return val;
4503 }
4504
4505 #define ARM_GLUE_SECTION_FLAGS \
4506 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \
4507 | SEC_READONLY | SEC_LINKER_CREATED)
4508
4509 /* Create a fake section for use by the ARM backend of the linker. */
4510
4511 static bfd_boolean
4512 arm_make_glue_section (bfd * abfd, const char * name)
4513 {
4514 asection * sec;
4515
4516 sec = bfd_get_section_by_name (abfd, name);
4517 if (sec != NULL)
4518 /* Already made. */
4519 return TRUE;
4520
4521 sec = bfd_make_section_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
4522
4523 if (sec == NULL
4524 || !bfd_set_section_alignment (abfd, sec, 2))
4525 return FALSE;
4526
4527 /* Set the gc mark to prevent the section from being removed by garbage
4528 collection, despite the fact that no relocs refer to this section. */
4529 sec->gc_mark = 1;
4530
4531 return TRUE;
4532 }
4533
4534 /* Add the glue sections to ABFD. This function is called from the
4535 linker scripts in ld/emultempl/{armelf}.em. */
4536
4537 bfd_boolean
4538 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
4539 struct bfd_link_info *info)
4540 {
4541 /* If we are only performing a partial
4542 link do not bother adding the glue. */
4543 if (info->relocatable)
4544 return TRUE;
4545
4546 return arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
4547 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
4548 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
4549 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
4550 }
4551
4552 /* Select a BFD to be used to hold the sections used by the glue code.
4553 This function is called from the linker scripts in ld/emultempl/
4554 {armelf/pe}.em. */
4555
4556 bfd_boolean
4557 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
4558 {
4559 struct elf32_arm_link_hash_table *globals;
4560
4561 /* If we are only performing a partial link
4562 do not bother getting a bfd to hold the glue. */
4563 if (info->relocatable)
4564 return TRUE;
4565
4566 /* Make sure we don't attach the glue sections to a dynamic object. */
4567 BFD_ASSERT (!(abfd->flags & DYNAMIC));
4568
4569 globals = elf32_arm_hash_table (info);
4570
4571 BFD_ASSERT (globals != NULL);
4572
4573 if (globals->bfd_of_glue_owner != NULL)
4574 return TRUE;
4575
4576 /* Save the bfd for later use. */
4577 globals->bfd_of_glue_owner = abfd;
4578
4579 return TRUE;
4580 }
4581
4582 static void
4583 check_use_blx (struct elf32_arm_link_hash_table *globals)
4584 {
4585 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4586 Tag_CPU_arch) > 2)
4587 globals->use_blx = 1;
4588 }
4589
4590 bfd_boolean
4591 bfd_elf32_arm_process_before_allocation (bfd *abfd,
4592 struct bfd_link_info *link_info)
4593 {
4594 Elf_Internal_Shdr *symtab_hdr;
4595 Elf_Internal_Rela *internal_relocs = NULL;
4596 Elf_Internal_Rela *irel, *irelend;
4597 bfd_byte *contents = NULL;
4598
4599 asection *sec;
4600 struct elf32_arm_link_hash_table *globals;
4601
4602 /* If we are only performing a partial link do not bother
4603 to construct any glue. */
4604 if (link_info->relocatable)
4605 return TRUE;
4606
4607 /* Here we have a bfd that is to be included on the link. We have a
4608 hook to do reloc rummaging, before section sizes are nailed down. */
4609 globals = elf32_arm_hash_table (link_info);
4610
4611 BFD_ASSERT (globals != NULL);
4612
4613 check_use_blx (globals);
4614
4615 if (globals->byteswap_code && !bfd_big_endian (abfd))
4616 {
4617 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
4618 abfd);
4619 return FALSE;
4620 }
4621
4622 /* PR 5398: If we have not decided to include any loadable sections in
4623 the output then we will not have a glue owner bfd. This is OK, it
4624 just means that there is nothing else for us to do here. */
4625 if (globals->bfd_of_glue_owner == NULL)
4626 return TRUE;
4627
4628 /* Rummage around all the relocs and map the glue vectors. */
4629 sec = abfd->sections;
4630
4631 if (sec == NULL)
4632 return TRUE;
4633
4634 for (; sec != NULL; sec = sec->next)
4635 {
4636 if (sec->reloc_count == 0)
4637 continue;
4638
4639 if ((sec->flags & SEC_EXCLUDE) != 0)
4640 continue;
4641
4642 symtab_hdr = & elf_symtab_hdr (abfd);
4643
4644 /* Load the relocs. */
4645 internal_relocs
4646 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
4647
4648 if (internal_relocs == NULL)
4649 goto error_return;
4650
4651 irelend = internal_relocs + sec->reloc_count;
4652 for (irel = internal_relocs; irel < irelend; irel++)
4653 {
4654 long r_type;
4655 unsigned long r_index;
4656
4657 struct elf_link_hash_entry *h;
4658
4659 r_type = ELF32_R_TYPE (irel->r_info);
4660 r_index = ELF32_R_SYM (irel->r_info);
4661
4662 /* These are the only relocation types we care about. */
4663 if ( r_type != R_ARM_PC24
4664 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
4665 continue;
4666
4667 /* Get the section contents if we haven't done so already. */
4668 if (contents == NULL)
4669 {
4670 /* Get cached copy if it exists. */
4671 if (elf_section_data (sec)->this_hdr.contents != NULL)
4672 contents = elf_section_data (sec)->this_hdr.contents;
4673 else
4674 {
4675 /* Go get them off disk. */
4676 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
4677 goto error_return;
4678 }
4679 }
4680
4681 if (r_type == R_ARM_V4BX)
4682 {
4683 int reg;
4684
4685 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
4686 record_arm_bx_glue (link_info, reg);
4687 continue;
4688 }
4689
4690 /* If the relocation is not against a symbol it cannot concern us. */
4691 h = NULL;
4692
4693 /* We don't care about local symbols. */
4694 if (r_index < symtab_hdr->sh_info)
4695 continue;
4696
4697 /* This is an external symbol. */
4698 r_index -= symtab_hdr->sh_info;
4699 h = (struct elf_link_hash_entry *)
4700 elf_sym_hashes (abfd)[r_index];
4701
4702 /* If the relocation is against a static symbol it must be within
4703 the current section and so cannot be a cross ARM/Thumb relocation. */
4704 if (h == NULL)
4705 continue;
4706
4707 /* If the call will go through a PLT entry then we do not need
4708 glue. */
4709 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
4710 continue;
4711
4712 switch (r_type)
4713 {
4714 case R_ARM_PC24:
4715 /* This one is a call from arm code. We need to look up
4716 the target of the call. If it is a thumb target, we
4717 insert glue. */
4718 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
4719 record_arm_to_thumb_glue (link_info, h);
4720 break;
4721
4722 default:
4723 abort ();
4724 }
4725 }
4726
4727 if (contents != NULL
4728 && elf_section_data (sec)->this_hdr.contents != contents)
4729 free (contents);
4730 contents = NULL;
4731
4732 if (internal_relocs != NULL
4733 && elf_section_data (sec)->relocs != internal_relocs)
4734 free (internal_relocs);
4735 internal_relocs = NULL;
4736 }
4737
4738 return TRUE;
4739
4740 error_return:
4741 if (contents != NULL
4742 && elf_section_data (sec)->this_hdr.contents != contents)
4743 free (contents);
4744 if (internal_relocs != NULL
4745 && elf_section_data (sec)->relocs != internal_relocs)
4746 free (internal_relocs);
4747
4748 return FALSE;
4749 }
4750 #endif
4751
4752
4753 /* Initialise maps of ARM/Thumb/data for input BFDs. */
4754
4755 void
4756 bfd_elf32_arm_init_maps (bfd *abfd)
4757 {
4758 Elf_Internal_Sym *isymbuf;
4759 Elf_Internal_Shdr *hdr;
4760 unsigned int i, localsyms;
4761
4762 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
4763 if (! is_arm_elf (abfd))
4764 return;
4765
4766 if ((abfd->flags & DYNAMIC) != 0)
4767 return;
4768
4769 hdr = & elf_symtab_hdr (abfd);
4770 localsyms = hdr->sh_info;
4771
4772 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4773 should contain the number of local symbols, which should come before any
4774 global symbols. Mapping symbols are always local. */
4775 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
4776 NULL);
4777
4778 /* No internal symbols read? Skip this BFD. */
4779 if (isymbuf == NULL)
4780 return;
4781
4782 for (i = 0; i < localsyms; i++)
4783 {
4784 Elf_Internal_Sym *isym = &isymbuf[i];
4785 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4786 const char *name;
4787
4788 if (sec != NULL
4789 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4790 {
4791 name = bfd_elf_string_from_elf_section (abfd,
4792 hdr->sh_link, isym->st_name);
4793
4794 if (bfd_is_arm_special_symbol_name (name,
4795 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
4796 elf32_arm_section_map_add (sec, name[1], isym->st_value);
4797 }
4798 }
4799 }
4800
4801
4802 void
4803 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
4804 {
4805 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
4806 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
4807
4808 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
4809 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
4810 {
4811 switch (globals->vfp11_fix)
4812 {
4813 case BFD_ARM_VFP11_FIX_DEFAULT:
4814 case BFD_ARM_VFP11_FIX_NONE:
4815 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4816 break;
4817
4818 default:
4819 /* Give a warning, but do as the user requests anyway. */
4820 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
4821 "workaround is not necessary for target architecture"), obfd);
4822 }
4823 }
4824 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
4825 /* For earlier architectures, we might need the workaround, but do not
4826 enable it by default. If users is running with broken hardware, they
4827 must enable the erratum fix explicitly. */
4828 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4829 }
4830
4831
4832 enum bfd_arm_vfp11_pipe
4833 {
4834 VFP11_FMAC,
4835 VFP11_LS,
4836 VFP11_DS,
4837 VFP11_BAD
4838 };
4839
4840 /* Return a VFP register number. This is encoded as RX:X for single-precision
4841 registers, or X:RX for double-precision registers, where RX is the group of
4842 four bits in the instruction encoding and X is the single extension bit.
4843 RX and X fields are specified using their lowest (starting) bit. The return
4844 value is:
4845
4846 0...31: single-precision registers s0...s31
4847 32...63: double-precision registers d0...d31.
4848
4849 Although X should be zero for VFP11 (encoding d0...d15 only), we might
4850 encounter VFP3 instructions, so we allow the full range for DP registers. */
4851
4852 static unsigned int
4853 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
4854 unsigned int x)
4855 {
4856 if (is_double)
4857 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
4858 else
4859 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
4860 }
4861
4862 /* Set bits in *WMASK according to a register number REG as encoded by
4863 bfd_arm_vfp11_regno(). Ignore d16-d31. */
4864
4865 static void
4866 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
4867 {
4868 if (reg < 32)
4869 *wmask |= 1 << reg;
4870 else if (reg < 48)
4871 *wmask |= 3 << ((reg - 32) * 2);
4872 }
4873
4874 /* Return TRUE if WMASK overwrites anything in REGS. */
4875
4876 static bfd_boolean
4877 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
4878 {
4879 int i;
4880
4881 for (i = 0; i < numregs; i++)
4882 {
4883 unsigned int reg = regs[i];
4884
4885 if (reg < 32 && (wmask & (1 << reg)) != 0)
4886 return TRUE;
4887
4888 reg -= 32;
4889
4890 if (reg >= 16)
4891 continue;
4892
4893 if ((wmask & (3 << (reg * 2))) != 0)
4894 return TRUE;
4895 }
4896
4897 return FALSE;
4898 }
4899
4900 /* In this function, we're interested in two things: finding input registers
4901 for VFP data-processing instructions, and finding the set of registers which
4902 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
4903 hold the written set, so FLDM etc. are easy to deal with (we're only
4904 interested in 32 SP registers or 16 dp registers, due to the VFP version
4905 implemented by the chip in question). DP registers are marked by setting
4906 both SP registers in the write mask). */
4907
4908 static enum bfd_arm_vfp11_pipe
4909 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
4910 int *numregs)
4911 {
4912 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
4913 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
4914
4915 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
4916 {
4917 unsigned int pqrs;
4918 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
4919 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
4920
4921 pqrs = ((insn & 0x00800000) >> 20)
4922 | ((insn & 0x00300000) >> 19)
4923 | ((insn & 0x00000040) >> 6);
4924
4925 switch (pqrs)
4926 {
4927 case 0: /* fmac[sd]. */
4928 case 1: /* fnmac[sd]. */
4929 case 2: /* fmsc[sd]. */
4930 case 3: /* fnmsc[sd]. */
4931 pipe = VFP11_FMAC;
4932 bfd_arm_vfp11_write_mask (destmask, fd);
4933 regs[0] = fd;
4934 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4935 regs[2] = fm;
4936 *numregs = 3;
4937 break;
4938
4939 case 4: /* fmul[sd]. */
4940 case 5: /* fnmul[sd]. */
4941 case 6: /* fadd[sd]. */
4942 case 7: /* fsub[sd]. */
4943 pipe = VFP11_FMAC;
4944 goto vfp_binop;
4945
4946 case 8: /* fdiv[sd]. */
4947 pipe = VFP11_DS;
4948 vfp_binop:
4949 bfd_arm_vfp11_write_mask (destmask, fd);
4950 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4951 regs[1] = fm;
4952 *numregs = 2;
4953 break;
4954
4955 case 15: /* extended opcode. */
4956 {
4957 unsigned int extn = ((insn >> 15) & 0x1e)
4958 | ((insn >> 7) & 1);
4959
4960 switch (extn)
4961 {
4962 case 0: /* fcpy[sd]. */
4963 case 1: /* fabs[sd]. */
4964 case 2: /* fneg[sd]. */
4965 case 8: /* fcmp[sd]. */
4966 case 9: /* fcmpe[sd]. */
4967 case 10: /* fcmpz[sd]. */
4968 case 11: /* fcmpez[sd]. */
4969 case 16: /* fuito[sd]. */
4970 case 17: /* fsito[sd]. */
4971 case 24: /* ftoui[sd]. */
4972 case 25: /* ftouiz[sd]. */
4973 case 26: /* ftosi[sd]. */
4974 case 27: /* ftosiz[sd]. */
4975 /* These instructions will not bounce due to underflow. */
4976 *numregs = 0;
4977 pipe = VFP11_FMAC;
4978 break;
4979
4980 case 3: /* fsqrt[sd]. */
4981 /* fsqrt cannot underflow, but it can (perhaps) overwrite
4982 registers to cause the erratum in previous instructions. */
4983 bfd_arm_vfp11_write_mask (destmask, fd);
4984 pipe = VFP11_DS;
4985 break;
4986
4987 case 15: /* fcvt{ds,sd}. */
4988 {
4989 int rnum = 0;
4990
4991 bfd_arm_vfp11_write_mask (destmask, fd);
4992
4993 /* Only FCVTSD can underflow. */
4994 if ((insn & 0x100) != 0)
4995 regs[rnum++] = fm;
4996
4997 *numregs = rnum;
4998
4999 pipe = VFP11_FMAC;
5000 }
5001 break;
5002
5003 default:
5004 return VFP11_BAD;
5005 }
5006 }
5007 break;
5008
5009 default:
5010 return VFP11_BAD;
5011 }
5012 }
5013 /* Two-register transfer. */
5014 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
5015 {
5016 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
5017
5018 if ((insn & 0x100000) == 0)
5019 {
5020 if (is_double)
5021 bfd_arm_vfp11_write_mask (destmask, fm);
5022 else
5023 {
5024 bfd_arm_vfp11_write_mask (destmask, fm);
5025 bfd_arm_vfp11_write_mask (destmask, fm + 1);
5026 }
5027 }
5028
5029 pipe = VFP11_LS;
5030 }
5031 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
5032 {
5033 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
5034 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
5035
5036 switch (puw)
5037 {
5038 case 0: /* Two-reg transfer. We should catch these above. */
5039 abort ();
5040
5041 case 2: /* fldm[sdx]. */
5042 case 3:
5043 case 5:
5044 {
5045 unsigned int i, offset = insn & 0xff;
5046
5047 if (is_double)
5048 offset >>= 1;
5049
5050 for (i = fd; i < fd + offset; i++)
5051 bfd_arm_vfp11_write_mask (destmask, i);
5052 }
5053 break;
5054
5055 case 4: /* fld[sd]. */
5056 case 6:
5057 bfd_arm_vfp11_write_mask (destmask, fd);
5058 break;
5059
5060 default:
5061 return VFP11_BAD;
5062 }
5063
5064 pipe = VFP11_LS;
5065 }
5066 /* Single-register transfer. Note L==0. */
5067 else if ((insn & 0x0f100e10) == 0x0e000a10)
5068 {
5069 unsigned int opcode = (insn >> 21) & 7;
5070 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
5071
5072 switch (opcode)
5073 {
5074 case 0: /* fmsr/fmdlr. */
5075 case 1: /* fmdhr. */
5076 /* Mark fmdhr and fmdlr as writing to the whole of the DP
5077 destination register. I don't know if this is exactly right,
5078 but it is the conservative choice. */
5079 bfd_arm_vfp11_write_mask (destmask, fn);
5080 break;
5081
5082 case 7: /* fmxr. */
5083 break;
5084 }
5085
5086 pipe = VFP11_LS;
5087 }
5088
5089 return pipe;
5090 }
5091
5092
5093 static int elf32_arm_compare_mapping (const void * a, const void * b);
5094
5095
5096 /* Look for potentially-troublesome code sequences which might trigger the
5097 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
5098 (available from ARM) for details of the erratum. A short version is
5099 described in ld.texinfo. */
5100
5101 bfd_boolean
5102 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
5103 {
5104 asection *sec;
5105 bfd_byte *contents = NULL;
5106 int state = 0;
5107 int regs[3], numregs = 0;
5108 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
5109 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
5110
5111 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
5112 The states transition as follows:
5113
5114 0 -> 1 (vector) or 0 -> 2 (scalar)
5115 A VFP FMAC-pipeline instruction has been seen. Fill
5116 regs[0]..regs[numregs-1] with its input operands. Remember this
5117 instruction in 'first_fmac'.
5118
5119 1 -> 2
5120 Any instruction, except for a VFP instruction which overwrites
5121 regs[*].
5122
5123 1 -> 3 [ -> 0 ] or
5124 2 -> 3 [ -> 0 ]
5125 A VFP instruction has been seen which overwrites any of regs[*].
5126 We must make a veneer! Reset state to 0 before examining next
5127 instruction.
5128
5129 2 -> 0
5130 If we fail to match anything in state 2, reset to state 0 and reset
5131 the instruction pointer to the instruction after 'first_fmac'.
5132
5133 If the VFP11 vector mode is in use, there must be at least two unrelated
5134 instructions between anti-dependent VFP11 instructions to properly avoid
5135 triggering the erratum, hence the use of the extra state 1. */
5136
5137 /* If we are only performing a partial link do not bother
5138 to construct any glue. */
5139 if (link_info->relocatable)
5140 return TRUE;
5141
5142 /* Skip if this bfd does not correspond to an ELF image. */
5143 if (! is_arm_elf (abfd))
5144 return TRUE;
5145
5146 /* We should have chosen a fix type by the time we get here. */
5147 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
5148
5149 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
5150 return TRUE;
5151
5152 /* Skip this BFD if it corresponds to an executable or dynamic object. */
5153 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
5154 return TRUE;
5155
5156 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5157 {
5158 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
5159 struct _arm_elf_section_data *sec_data;
5160
5161 /* If we don't have executable progbits, we're not interested in this
5162 section. Also skip if section is to be excluded. */
5163 if (elf_section_type (sec) != SHT_PROGBITS
5164 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
5165 || (sec->flags & SEC_EXCLUDE) != 0
5166 || sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
5167 || sec->output_section == bfd_abs_section_ptr
5168 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
5169 continue;
5170
5171 sec_data = elf32_arm_section_data (sec);
5172
5173 if (sec_data->mapcount == 0)
5174 continue;
5175
5176 if (elf_section_data (sec)->this_hdr.contents != NULL)
5177 contents = elf_section_data (sec)->this_hdr.contents;
5178 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
5179 goto error_return;
5180
5181 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
5182 elf32_arm_compare_mapping);
5183
5184 for (span = 0; span < sec_data->mapcount; span++)
5185 {
5186 unsigned int span_start = sec_data->map[span].vma;
5187 unsigned int span_end = (span == sec_data->mapcount - 1)
5188 ? sec->size : sec_data->map[span + 1].vma;
5189 char span_type = sec_data->map[span].type;
5190
5191 /* FIXME: Only ARM mode is supported at present. We may need to
5192 support Thumb-2 mode also at some point. */
5193 if (span_type != 'a')
5194 continue;
5195
5196 for (i = span_start; i < span_end;)
5197 {
5198 unsigned int next_i = i + 4;
5199 unsigned int insn = bfd_big_endian (abfd)
5200 ? (contents[i] << 24)
5201 | (contents[i + 1] << 16)
5202 | (contents[i + 2] << 8)
5203 | contents[i + 3]
5204 : (contents[i + 3] << 24)
5205 | (contents[i + 2] << 16)
5206 | (contents[i + 1] << 8)
5207 | contents[i];
5208 unsigned int writemask = 0;
5209 enum bfd_arm_vfp11_pipe pipe;
5210
5211 switch (state)
5212 {
5213 case 0:
5214 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
5215 &numregs);
5216 /* I'm assuming the VFP11 erratum can trigger with denorm
5217 operands on either the FMAC or the DS pipeline. This might
5218 lead to slightly overenthusiastic veneer insertion. */
5219 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
5220 {
5221 state = use_vector ? 1 : 2;
5222 first_fmac = i;
5223 veneer_of_insn = insn;
5224 }
5225 break;
5226
5227 case 1:
5228 {
5229 int other_regs[3], other_numregs;
5230 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5231 other_regs,
5232 &other_numregs);
5233 if (pipe != VFP11_BAD
5234 && bfd_arm_vfp11_antidependency (writemask, regs,
5235 numregs))
5236 state = 3;
5237 else
5238 state = 2;
5239 }
5240 break;
5241
5242 case 2:
5243 {
5244 int other_regs[3], other_numregs;
5245 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5246 other_regs,
5247 &other_numregs);
5248 if (pipe != VFP11_BAD
5249 && bfd_arm_vfp11_antidependency (writemask, regs,
5250 numregs))
5251 state = 3;
5252 else
5253 {
5254 state = 0;
5255 next_i = first_fmac + 4;
5256 }
5257 }
5258 break;
5259
5260 case 3:
5261 abort (); /* Should be unreachable. */
5262 }
5263
5264 if (state == 3)
5265 {
5266 elf32_vfp11_erratum_list *newerr
5267 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
5268 int errcount;
5269
5270 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
5271
5272 newerr->u.b.vfp_insn = veneer_of_insn;
5273
5274 switch (span_type)
5275 {
5276 case 'a':
5277 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
5278 break;
5279
5280 default:
5281 abort ();
5282 }
5283
5284 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
5285 first_fmac);
5286
5287 newerr->vma = -1;
5288
5289 newerr->next = sec_data->erratumlist;
5290 sec_data->erratumlist = newerr;
5291
5292 state = 0;
5293 }
5294
5295 i = next_i;
5296 }
5297 }
5298
5299 if (contents != NULL
5300 && elf_section_data (sec)->this_hdr.contents != contents)
5301 free (contents);
5302 contents = NULL;
5303 }
5304
5305 return TRUE;
5306
5307 error_return:
5308 if (contents != NULL
5309 && elf_section_data (sec)->this_hdr.contents != contents)
5310 free (contents);
5311
5312 return FALSE;
5313 }
5314
5315 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
5316 after sections have been laid out, using specially-named symbols. */
5317
5318 void
5319 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
5320 struct bfd_link_info *link_info)
5321 {
5322 asection *sec;
5323 struct elf32_arm_link_hash_table *globals;
5324 char *tmp_name;
5325
5326 if (link_info->relocatable)
5327 return;
5328
5329 /* Skip if this bfd does not correspond to an ELF image. */
5330 if (! is_arm_elf (abfd))
5331 return;
5332
5333 globals = elf32_arm_hash_table (link_info);
5334
5335 tmp_name = bfd_malloc ((bfd_size_type) strlen
5336 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
5337
5338 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5339 {
5340 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
5341 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
5342
5343 for (; errnode != NULL; errnode = errnode->next)
5344 {
5345 struct elf_link_hash_entry *myh;
5346 bfd_vma vma;
5347
5348 switch (errnode->type)
5349 {
5350 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
5351 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
5352 /* Find veneer symbol. */
5353 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
5354 errnode->u.b.veneer->u.v.id);
5355
5356 myh = elf_link_hash_lookup
5357 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5358
5359 if (myh == NULL)
5360 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5361 "`%s'"), abfd, tmp_name);
5362
5363 vma = myh->root.u.def.section->output_section->vma
5364 + myh->root.u.def.section->output_offset
5365 + myh->root.u.def.value;
5366
5367 errnode->u.b.veneer->vma = vma;
5368 break;
5369
5370 case VFP11_ERRATUM_ARM_VENEER:
5371 case VFP11_ERRATUM_THUMB_VENEER:
5372 /* Find return location. */
5373 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
5374 errnode->u.v.id);
5375
5376 myh = elf_link_hash_lookup
5377 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5378
5379 if (myh == NULL)
5380 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5381 "`%s'"), abfd, tmp_name);
5382
5383 vma = myh->root.u.def.section->output_section->vma
5384 + myh->root.u.def.section->output_offset
5385 + myh->root.u.def.value;
5386
5387 errnode->u.v.branch->vma = vma;
5388 break;
5389
5390 default:
5391 abort ();
5392 }
5393 }
5394 }
5395
5396 free (tmp_name);
5397 }
5398
5399
5400 /* Set target relocation values needed during linking. */
5401
5402 void
5403 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
5404 struct bfd_link_info *link_info,
5405 int target1_is_rel,
5406 char * target2_type,
5407 int fix_v4bx,
5408 int use_blx,
5409 bfd_arm_vfp11_fix vfp11_fix,
5410 int no_enum_warn, int no_wchar_warn,
5411 int pic_veneer)
5412 {
5413 struct elf32_arm_link_hash_table *globals;
5414
5415 globals = elf32_arm_hash_table (link_info);
5416
5417 globals->target1_is_rel = target1_is_rel;
5418 if (strcmp (target2_type, "rel") == 0)
5419 globals->target2_reloc = R_ARM_REL32;
5420 else if (strcmp (target2_type, "abs") == 0)
5421 globals->target2_reloc = R_ARM_ABS32;
5422 else if (strcmp (target2_type, "got-rel") == 0)
5423 globals->target2_reloc = R_ARM_GOT_PREL;
5424 else
5425 {
5426 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
5427 target2_type);
5428 }
5429 globals->fix_v4bx = fix_v4bx;
5430 globals->use_blx |= use_blx;
5431 globals->vfp11_fix = vfp11_fix;
5432 globals->pic_veneer = pic_veneer;
5433
5434 BFD_ASSERT (is_arm_elf (output_bfd));
5435 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
5436 elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
5437 }
5438
5439 /* Replace the target offset of a Thumb bl or b.w instruction. */
5440
5441 static void
5442 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
5443 {
5444 bfd_vma upper;
5445 bfd_vma lower;
5446 int reloc_sign;
5447
5448 BFD_ASSERT ((offset & 1) == 0);
5449
5450 upper = bfd_get_16 (abfd, insn);
5451 lower = bfd_get_16 (abfd, insn + 2);
5452 reloc_sign = (offset < 0) ? 1 : 0;
5453 upper = (upper & ~(bfd_vma) 0x7ff)
5454 | ((offset >> 12) & 0x3ff)
5455 | (reloc_sign << 10);
5456 lower = (lower & ~(bfd_vma) 0x2fff)
5457 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
5458 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
5459 | ((offset >> 1) & 0x7ff);
5460 bfd_put_16 (abfd, upper, insn);
5461 bfd_put_16 (abfd, lower, insn + 2);
5462 }
5463
5464 /* Thumb code calling an ARM function. */
5465
5466 static int
5467 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
5468 const char * name,
5469 bfd * input_bfd,
5470 bfd * output_bfd,
5471 asection * input_section,
5472 bfd_byte * hit_data,
5473 asection * sym_sec,
5474 bfd_vma offset,
5475 bfd_signed_vma addend,
5476 bfd_vma val,
5477 char **error_message)
5478 {
5479 asection * s = 0;
5480 bfd_vma my_offset;
5481 long int ret_offset;
5482 struct elf_link_hash_entry * myh;
5483 struct elf32_arm_link_hash_table * globals;
5484
5485 myh = find_thumb_glue (info, name, error_message);
5486 if (myh == NULL)
5487 return FALSE;
5488
5489 globals = elf32_arm_hash_table (info);
5490
5491 BFD_ASSERT (globals != NULL);
5492 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5493
5494 my_offset = myh->root.u.def.value;
5495
5496 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5497 THUMB2ARM_GLUE_SECTION_NAME);
5498
5499 BFD_ASSERT (s != NULL);
5500 BFD_ASSERT (s->contents != NULL);
5501 BFD_ASSERT (s->output_section != NULL);
5502
5503 if ((my_offset & 0x01) == 0x01)
5504 {
5505 if (sym_sec != NULL
5506 && sym_sec->owner != NULL
5507 && !INTERWORK_FLAG (sym_sec->owner))
5508 {
5509 (*_bfd_error_handler)
5510 (_("%B(%s): warning: interworking not enabled.\n"
5511 " first occurrence: %B: thumb call to arm"),
5512 sym_sec->owner, input_bfd, name);
5513
5514 return FALSE;
5515 }
5516
5517 --my_offset;
5518 myh->root.u.def.value = my_offset;
5519
5520 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
5521 s->contents + my_offset);
5522
5523 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
5524 s->contents + my_offset + 2);
5525
5526 ret_offset =
5527 /* Address of destination of the stub. */
5528 ((bfd_signed_vma) val)
5529 - ((bfd_signed_vma)
5530 /* Offset from the start of the current section
5531 to the start of the stubs. */
5532 (s->output_offset
5533 /* Offset of the start of this stub from the start of the stubs. */
5534 + my_offset
5535 /* Address of the start of the current section. */
5536 + s->output_section->vma)
5537 /* The branch instruction is 4 bytes into the stub. */
5538 + 4
5539 /* ARM branches work from the pc of the instruction + 8. */
5540 + 8);
5541
5542 put_arm_insn (globals, output_bfd,
5543 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
5544 s->contents + my_offset + 4);
5545 }
5546
5547 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
5548
5549 /* Now go back and fix up the original BL insn to point to here. */
5550 ret_offset =
5551 /* Address of where the stub is located. */
5552 (s->output_section->vma + s->output_offset + my_offset)
5553 /* Address of where the BL is located. */
5554 - (input_section->output_section->vma + input_section->output_offset
5555 + offset)
5556 /* Addend in the relocation. */
5557 - addend
5558 /* Biassing for PC-relative addressing. */
5559 - 8;
5560
5561 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
5562
5563 return TRUE;
5564 }
5565
5566 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
5567
5568 static struct elf_link_hash_entry *
5569 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
5570 const char * name,
5571 bfd * input_bfd,
5572 bfd * output_bfd,
5573 asection * sym_sec,
5574 bfd_vma val,
5575 asection * s,
5576 char ** error_message)
5577 {
5578 bfd_vma my_offset;
5579 long int ret_offset;
5580 struct elf_link_hash_entry * myh;
5581 struct elf32_arm_link_hash_table * globals;
5582
5583 myh = find_arm_glue (info, name, error_message);
5584 if (myh == NULL)
5585 return NULL;
5586
5587 globals = elf32_arm_hash_table (info);
5588
5589 BFD_ASSERT (globals != NULL);
5590 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5591
5592 my_offset = myh->root.u.def.value;
5593
5594 if ((my_offset & 0x01) == 0x01)
5595 {
5596 if (sym_sec != NULL
5597 && sym_sec->owner != NULL
5598 && !INTERWORK_FLAG (sym_sec->owner))
5599 {
5600 (*_bfd_error_handler)
5601 (_("%B(%s): warning: interworking not enabled.\n"
5602 " first occurrence: %B: arm call to thumb"),
5603 sym_sec->owner, input_bfd, name);
5604 }
5605
5606 --my_offset;
5607 myh->root.u.def.value = my_offset;
5608
5609 if (info->shared || globals->root.is_relocatable_executable
5610 || globals->pic_veneer)
5611 {
5612 /* For relocatable objects we can't use absolute addresses,
5613 so construct the address from a relative offset. */
5614 /* TODO: If the offset is small it's probably worth
5615 constructing the address with adds. */
5616 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
5617 s->contents + my_offset);
5618 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
5619 s->contents + my_offset + 4);
5620 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
5621 s->contents + my_offset + 8);
5622 /* Adjust the offset by 4 for the position of the add,
5623 and 8 for the pipeline offset. */
5624 ret_offset = (val - (s->output_offset
5625 + s->output_section->vma
5626 + my_offset + 12))
5627 | 1;
5628 bfd_put_32 (output_bfd, ret_offset,
5629 s->contents + my_offset + 12);
5630 }
5631 else if (globals->use_blx)
5632 {
5633 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
5634 s->contents + my_offset);
5635
5636 /* It's a thumb address. Add the low order bit. */
5637 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
5638 s->contents + my_offset + 4);
5639 }
5640 else
5641 {
5642 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
5643 s->contents + my_offset);
5644
5645 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
5646 s->contents + my_offset + 4);
5647
5648 /* It's a thumb address. Add the low order bit. */
5649 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
5650 s->contents + my_offset + 8);
5651
5652 my_offset += 12;
5653 }
5654 }
5655
5656 BFD_ASSERT (my_offset <= globals->arm_glue_size);
5657
5658 return myh;
5659 }
5660
5661 /* Arm code calling a Thumb function. */
5662
5663 static int
5664 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
5665 const char * name,
5666 bfd * input_bfd,
5667 bfd * output_bfd,
5668 asection * input_section,
5669 bfd_byte * hit_data,
5670 asection * sym_sec,
5671 bfd_vma offset,
5672 bfd_signed_vma addend,
5673 bfd_vma val,
5674 char **error_message)
5675 {
5676 unsigned long int tmp;
5677 bfd_vma my_offset;
5678 asection * s;
5679 long int ret_offset;
5680 struct elf_link_hash_entry * myh;
5681 struct elf32_arm_link_hash_table * globals;
5682
5683 globals = elf32_arm_hash_table (info);
5684
5685 BFD_ASSERT (globals != NULL);
5686 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5687
5688 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5689 ARM2THUMB_GLUE_SECTION_NAME);
5690 BFD_ASSERT (s != NULL);
5691 BFD_ASSERT (s->contents != NULL);
5692 BFD_ASSERT (s->output_section != NULL);
5693
5694 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
5695 sym_sec, val, s, error_message);
5696 if (!myh)
5697 return FALSE;
5698
5699 my_offset = myh->root.u.def.value;
5700 tmp = bfd_get_32 (input_bfd, hit_data);
5701 tmp = tmp & 0xFF000000;
5702
5703 /* Somehow these are both 4 too far, so subtract 8. */
5704 ret_offset = (s->output_offset
5705 + my_offset
5706 + s->output_section->vma
5707 - (input_section->output_offset
5708 + input_section->output_section->vma
5709 + offset + addend)
5710 - 8);
5711
5712 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
5713
5714 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
5715
5716 return TRUE;
5717 }
5718
5719 /* Populate Arm stub for an exported Thumb function. */
5720
5721 static bfd_boolean
5722 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
5723 {
5724 struct bfd_link_info * info = (struct bfd_link_info *) inf;
5725 asection * s;
5726 struct elf_link_hash_entry * myh;
5727 struct elf32_arm_link_hash_entry *eh;
5728 struct elf32_arm_link_hash_table * globals;
5729 asection *sec;
5730 bfd_vma val;
5731 char *error_message;
5732
5733 eh = elf32_arm_hash_entry (h);
5734 /* Allocate stubs for exported Thumb functions on v4t. */
5735 if (eh->export_glue == NULL)
5736 return TRUE;
5737
5738 globals = elf32_arm_hash_table (info);
5739
5740 BFD_ASSERT (globals != NULL);
5741 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5742
5743 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5744 ARM2THUMB_GLUE_SECTION_NAME);
5745 BFD_ASSERT (s != NULL);
5746 BFD_ASSERT (s->contents != NULL);
5747 BFD_ASSERT (s->output_section != NULL);
5748
5749 sec = eh->export_glue->root.u.def.section;
5750
5751 BFD_ASSERT (sec->output_section != NULL);
5752
5753 val = eh->export_glue->root.u.def.value + sec->output_offset
5754 + sec->output_section->vma;
5755
5756 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
5757 h->root.u.def.section->owner,
5758 globals->obfd, sec, val, s,
5759 &error_message);
5760 BFD_ASSERT (myh);
5761 return TRUE;
5762 }
5763
5764 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
5765
5766 static bfd_vma
5767 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
5768 {
5769 bfd_byte *p;
5770 bfd_vma glue_addr;
5771 asection *s;
5772 struct elf32_arm_link_hash_table *globals;
5773
5774 globals = elf32_arm_hash_table (info);
5775
5776 BFD_ASSERT (globals != NULL);
5777 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5778
5779 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5780 ARM_BX_GLUE_SECTION_NAME);
5781 BFD_ASSERT (s != NULL);
5782 BFD_ASSERT (s->contents != NULL);
5783 BFD_ASSERT (s->output_section != NULL);
5784
5785 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
5786
5787 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
5788
5789 if ((globals->bx_glue_offset[reg] & 1) == 0)
5790 {
5791 p = s->contents + glue_addr;
5792 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
5793 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
5794 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
5795 globals->bx_glue_offset[reg] |= 1;
5796 }
5797
5798 return glue_addr + s->output_section->vma + s->output_offset;
5799 }
5800
5801 /* Generate Arm stubs for exported Thumb symbols. */
5802 static void
5803 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
5804 struct bfd_link_info *link_info)
5805 {
5806 struct elf32_arm_link_hash_table * globals;
5807
5808 if (link_info == NULL)
5809 /* Ignore this if we are not called by the ELF backend linker. */
5810 return;
5811
5812 globals = elf32_arm_hash_table (link_info);
5813 /* If blx is available then exported Thumb symbols are OK and there is
5814 nothing to do. */
5815 if (globals->use_blx)
5816 return;
5817
5818 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
5819 link_info);
5820 }
5821
5822 /* Some relocations map to different relocations depending on the
5823 target. Return the real relocation. */
5824
5825 static int
5826 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
5827 int r_type)
5828 {
5829 switch (r_type)
5830 {
5831 case R_ARM_TARGET1:
5832 if (globals->target1_is_rel)
5833 return R_ARM_REL32;
5834 else
5835 return R_ARM_ABS32;
5836
5837 case R_ARM_TARGET2:
5838 return globals->target2_reloc;
5839
5840 default:
5841 return r_type;
5842 }
5843 }
5844
5845 /* Return the base VMA address which should be subtracted from real addresses
5846 when resolving @dtpoff relocation.
5847 This is PT_TLS segment p_vaddr. */
5848
5849 static bfd_vma
5850 dtpoff_base (struct bfd_link_info *info)
5851 {
5852 /* If tls_sec is NULL, we should have signalled an error already. */
5853 if (elf_hash_table (info)->tls_sec == NULL)
5854 return 0;
5855 return elf_hash_table (info)->tls_sec->vma;
5856 }
5857
5858 /* Return the relocation value for @tpoff relocation
5859 if STT_TLS virtual address is ADDRESS. */
5860
5861 static bfd_vma
5862 tpoff (struct bfd_link_info *info, bfd_vma address)
5863 {
5864 struct elf_link_hash_table *htab = elf_hash_table (info);
5865 bfd_vma base;
5866
5867 /* If tls_sec is NULL, we should have signalled an error already. */
5868 if (htab->tls_sec == NULL)
5869 return 0;
5870 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
5871 return address - htab->tls_sec->vma + base;
5872 }
5873
5874 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
5875 VALUE is the relocation value. */
5876
5877 static bfd_reloc_status_type
5878 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
5879 {
5880 if (value > 0xfff)
5881 return bfd_reloc_overflow;
5882
5883 value |= bfd_get_32 (abfd, data) & 0xfffff000;
5884 bfd_put_32 (abfd, value, data);
5885 return bfd_reloc_ok;
5886 }
5887
5888 /* For a given value of n, calculate the value of G_n as required to
5889 deal with group relocations. We return it in the form of an
5890 encoded constant-and-rotation, together with the final residual. If n is
5891 specified as less than zero, then final_residual is filled with the
5892 input value and no further action is performed. */
5893
5894 static bfd_vma
5895 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
5896 {
5897 int current_n;
5898 bfd_vma g_n;
5899 bfd_vma encoded_g_n = 0;
5900 bfd_vma residual = value; /* Also known as Y_n. */
5901
5902 for (current_n = 0; current_n <= n; current_n++)
5903 {
5904 int shift;
5905
5906 /* Calculate which part of the value to mask. */
5907 if (residual == 0)
5908 shift = 0;
5909 else
5910 {
5911 int msb;
5912
5913 /* Determine the most significant bit in the residual and
5914 align the resulting value to a 2-bit boundary. */
5915 for (msb = 30; msb >= 0; msb -= 2)
5916 if (residual & (3 << msb))
5917 break;
5918
5919 /* The desired shift is now (msb - 6), or zero, whichever
5920 is the greater. */
5921 shift = msb - 6;
5922 if (shift < 0)
5923 shift = 0;
5924 }
5925
5926 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
5927 g_n = residual & (0xff << shift);
5928 encoded_g_n = (g_n >> shift)
5929 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
5930
5931 /* Calculate the residual for the next time around. */
5932 residual &= ~g_n;
5933 }
5934
5935 *final_residual = residual;
5936
5937 return encoded_g_n;
5938 }
5939
5940 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
5941 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
5942
5943 static int
5944 identify_add_or_sub (bfd_vma insn)
5945 {
5946 int opcode = insn & 0x1e00000;
5947
5948 if (opcode == 1 << 23) /* ADD */
5949 return 1;
5950
5951 if (opcode == 1 << 22) /* SUB */
5952 return -1;
5953
5954 return 0;
5955 }
5956
5957 /* Perform a relocation as part of a final link. */
5958
5959 static bfd_reloc_status_type
5960 elf32_arm_final_link_relocate (reloc_howto_type * howto,
5961 bfd * input_bfd,
5962 bfd * output_bfd,
5963 asection * input_section,
5964 bfd_byte * contents,
5965 Elf_Internal_Rela * rel,
5966 bfd_vma value,
5967 struct bfd_link_info * info,
5968 asection * sym_sec,
5969 const char * sym_name,
5970 int sym_flags,
5971 struct elf_link_hash_entry * h,
5972 bfd_boolean * unresolved_reloc_p,
5973 char ** error_message)
5974 {
5975 unsigned long r_type = howto->type;
5976 unsigned long r_symndx;
5977 bfd_byte * hit_data = contents + rel->r_offset;
5978 bfd * dynobj = NULL;
5979 Elf_Internal_Shdr * symtab_hdr;
5980 struct elf_link_hash_entry ** sym_hashes;
5981 bfd_vma * local_got_offsets;
5982 asection * sgot = NULL;
5983 asection * splt = NULL;
5984 asection * sreloc = NULL;
5985 bfd_vma addend;
5986 bfd_signed_vma signed_addend;
5987 struct elf32_arm_link_hash_table * globals;
5988
5989 globals = elf32_arm_hash_table (info);
5990
5991 BFD_ASSERT (is_arm_elf (input_bfd));
5992
5993 /* Some relocation types map to different relocations depending on the
5994 target. We pick the right one here. */
5995 r_type = arm_real_reloc_type (globals, r_type);
5996 if (r_type != howto->type)
5997 howto = elf32_arm_howto_from_type (r_type);
5998
5999 /* If the start address has been set, then set the EF_ARM_HASENTRY
6000 flag. Setting this more than once is redundant, but the cost is
6001 not too high, and it keeps the code simple.
6002
6003 The test is done here, rather than somewhere else, because the
6004 start address is only set just before the final link commences.
6005
6006 Note - if the user deliberately sets a start address of 0, the
6007 flag will not be set. */
6008 if (bfd_get_start_address (output_bfd) != 0)
6009 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
6010
6011 dynobj = elf_hash_table (info)->dynobj;
6012 if (dynobj)
6013 {
6014 sgot = bfd_get_section_by_name (dynobj, ".got");
6015 splt = bfd_get_section_by_name (dynobj, ".plt");
6016 }
6017 symtab_hdr = & elf_symtab_hdr (input_bfd);
6018 sym_hashes = elf_sym_hashes (input_bfd);
6019 local_got_offsets = elf_local_got_offsets (input_bfd);
6020 r_symndx = ELF32_R_SYM (rel->r_info);
6021
6022 if (globals->use_rel)
6023 {
6024 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
6025
6026 if (addend & ((howto->src_mask + 1) >> 1))
6027 {
6028 signed_addend = -1;
6029 signed_addend &= ~ howto->src_mask;
6030 signed_addend |= addend;
6031 }
6032 else
6033 signed_addend = addend;
6034 }
6035 else
6036 addend = signed_addend = rel->r_addend;
6037
6038 switch (r_type)
6039 {
6040 case R_ARM_NONE:
6041 /* We don't need to find a value for this symbol. It's just a
6042 marker. */
6043 *unresolved_reloc_p = FALSE;
6044 return bfd_reloc_ok;
6045
6046 case R_ARM_ABS12:
6047 if (!globals->vxworks_p)
6048 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
6049
6050 case R_ARM_PC24:
6051 case R_ARM_ABS32:
6052 case R_ARM_ABS32_NOI:
6053 case R_ARM_REL32:
6054 case R_ARM_REL32_NOI:
6055 case R_ARM_CALL:
6056 case R_ARM_JUMP24:
6057 case R_ARM_XPC25:
6058 case R_ARM_PREL31:
6059 case R_ARM_PLT32:
6060 /* Handle relocations which should use the PLT entry. ABS32/REL32
6061 will use the symbol's value, which may point to a PLT entry, but we
6062 don't need to handle that here. If we created a PLT entry, all
6063 branches in this object should go to it, except if the PLT is too
6064 far away, in which case a long branch stub should be inserted. */
6065 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
6066 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI
6067 && r_type != R_ARM_CALL
6068 && r_type != R_ARM_JUMP24
6069 && r_type != R_ARM_PLT32)
6070 && h != NULL
6071 && splt != NULL
6072 && h->plt.offset != (bfd_vma) -1)
6073 {
6074 /* If we've created a .plt section, and assigned a PLT entry to
6075 this function, it should not be known to bind locally. If
6076 it were, we would have cleared the PLT entry. */
6077 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
6078
6079 value = (splt->output_section->vma
6080 + splt->output_offset
6081 + h->plt.offset);
6082 *unresolved_reloc_p = FALSE;
6083 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6084 contents, rel->r_offset, value,
6085 rel->r_addend);
6086 }
6087
6088 /* When generating a shared object or relocatable executable, these
6089 relocations are copied into the output file to be resolved at
6090 run time. */
6091 if ((info->shared || globals->root.is_relocatable_executable)
6092 && (input_section->flags & SEC_ALLOC)
6093 && !(elf32_arm_hash_table (info)->vxworks_p
6094 && strcmp (input_section->output_section->name,
6095 ".tls_vars") == 0)
6096 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
6097 || !SYMBOL_CALLS_LOCAL (info, h))
6098 && (h == NULL
6099 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6100 || h->root.type != bfd_link_hash_undefweak)
6101 && r_type != R_ARM_PC24
6102 && r_type != R_ARM_CALL
6103 && r_type != R_ARM_JUMP24
6104 && r_type != R_ARM_PREL31
6105 && r_type != R_ARM_PLT32)
6106 {
6107 Elf_Internal_Rela outrel;
6108 bfd_byte *loc;
6109 bfd_boolean skip, relocate;
6110
6111 *unresolved_reloc_p = FALSE;
6112
6113 if (sreloc == NULL)
6114 {
6115 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
6116 ! globals->use_rel);
6117
6118 if (sreloc == NULL)
6119 return bfd_reloc_notsupported;
6120 }
6121
6122 skip = FALSE;
6123 relocate = FALSE;
6124
6125 outrel.r_addend = addend;
6126 outrel.r_offset =
6127 _bfd_elf_section_offset (output_bfd, info, input_section,
6128 rel->r_offset);
6129 if (outrel.r_offset == (bfd_vma) -1)
6130 skip = TRUE;
6131 else if (outrel.r_offset == (bfd_vma) -2)
6132 skip = TRUE, relocate = TRUE;
6133 outrel.r_offset += (input_section->output_section->vma
6134 + input_section->output_offset);
6135
6136 if (skip)
6137 memset (&outrel, 0, sizeof outrel);
6138 else if (h != NULL
6139 && h->dynindx != -1
6140 && (!info->shared
6141 || !info->symbolic
6142 || !h->def_regular))
6143 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6144 else
6145 {
6146 int symbol;
6147
6148 /* This symbol is local, or marked to become local. */
6149 if (sym_flags == STT_ARM_TFUNC)
6150 value |= 1;
6151 if (globals->symbian_p)
6152 {
6153 asection *osec;
6154
6155 /* On Symbian OS, the data segment and text segement
6156 can be relocated independently. Therefore, we
6157 must indicate the segment to which this
6158 relocation is relative. The BPABI allows us to
6159 use any symbol in the right segment; we just use
6160 the section symbol as it is convenient. (We
6161 cannot use the symbol given by "h" directly as it
6162 will not appear in the dynamic symbol table.)
6163
6164 Note that the dynamic linker ignores the section
6165 symbol value, so we don't subtract osec->vma
6166 from the emitted reloc addend. */
6167 if (sym_sec)
6168 osec = sym_sec->output_section;
6169 else
6170 osec = input_section->output_section;
6171 symbol = elf_section_data (osec)->dynindx;
6172 if (symbol == 0)
6173 {
6174 struct elf_link_hash_table *htab = elf_hash_table (info);
6175
6176 if ((osec->flags & SEC_READONLY) == 0
6177 && htab->data_index_section != NULL)
6178 osec = htab->data_index_section;
6179 else
6180 osec = htab->text_index_section;
6181 symbol = elf_section_data (osec)->dynindx;
6182 }
6183 BFD_ASSERT (symbol != 0);
6184 }
6185 else
6186 /* On SVR4-ish systems, the dynamic loader cannot
6187 relocate the text and data segments independently,
6188 so the symbol does not matter. */
6189 symbol = 0;
6190 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
6191 if (globals->use_rel)
6192 relocate = TRUE;
6193 else
6194 outrel.r_addend += value;
6195 }
6196
6197 loc = sreloc->contents;
6198 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
6199 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6200
6201 /* If this reloc is against an external symbol, we do not want to
6202 fiddle with the addend. Otherwise, we need to include the symbol
6203 value so that it becomes an addend for the dynamic reloc. */
6204 if (! relocate)
6205 return bfd_reloc_ok;
6206
6207 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6208 contents, rel->r_offset, value,
6209 (bfd_vma) 0);
6210 }
6211 else switch (r_type)
6212 {
6213 case R_ARM_ABS12:
6214 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
6215
6216 case R_ARM_XPC25: /* Arm BLX instruction. */
6217 case R_ARM_CALL:
6218 case R_ARM_JUMP24:
6219 case R_ARM_PC24: /* Arm B/BL instruction. */
6220 case R_ARM_PLT32:
6221 {
6222 bfd_vma from;
6223 bfd_signed_vma branch_offset;
6224 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6225
6226 if (r_type == R_ARM_XPC25)
6227 {
6228 /* Check for Arm calling Arm function. */
6229 /* FIXME: Should we translate the instruction into a BL
6230 instruction instead ? */
6231 if (sym_flags != STT_ARM_TFUNC)
6232 (*_bfd_error_handler)
6233 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
6234 input_bfd,
6235 h ? h->root.root.string : "(local)");
6236 }
6237 else if (r_type == R_ARM_PC24)
6238 {
6239 /* Check for Arm calling Thumb function. */
6240 if (sym_flags == STT_ARM_TFUNC)
6241 {
6242 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
6243 output_bfd, input_section,
6244 hit_data, sym_sec, rel->r_offset,
6245 signed_addend, value,
6246 error_message))
6247 return bfd_reloc_ok;
6248 else
6249 return bfd_reloc_dangerous;
6250 }
6251 }
6252
6253 /* Check if a stub has to be inserted because the
6254 destination is too far or we are changing mode. */
6255 if ( r_type == R_ARM_CALL
6256 || r_type == R_ARM_JUMP24
6257 || r_type == R_ARM_PLT32)
6258 {
6259 /* If the call goes through a PLT entry, make sure to
6260 check distance to the right destination address. */
6261 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6262 {
6263 value = (splt->output_section->vma
6264 + splt->output_offset
6265 + h->plt.offset);
6266 *unresolved_reloc_p = FALSE;
6267 }
6268
6269 from = (input_section->output_section->vma
6270 + input_section->output_offset
6271 + rel->r_offset);
6272 branch_offset = (bfd_signed_vma)(value - from);
6273
6274 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
6275 || branch_offset < ARM_MAX_BWD_BRANCH_OFFSET
6276 || ((sym_flags == STT_ARM_TFUNC)
6277 && (((r_type == R_ARM_CALL) && !globals->use_blx)
6278 || (r_type == R_ARM_JUMP24)
6279 || (r_type == R_ARM_PLT32) ))
6280 )
6281 {
6282 /* The target is out of reach, so redirect the
6283 branch to the local stub for this function. */
6284
6285 stub_entry = elf32_arm_get_stub_entry (input_section,
6286 sym_sec, h,
6287 rel, globals);
6288 if (stub_entry != NULL)
6289 value = (stub_entry->stub_offset
6290 + stub_entry->stub_sec->output_offset
6291 + stub_entry->stub_sec->output_section->vma);
6292 }
6293 }
6294
6295 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
6296 where:
6297 S is the address of the symbol in the relocation.
6298 P is address of the instruction being relocated.
6299 A is the addend (extracted from the instruction) in bytes.
6300
6301 S is held in 'value'.
6302 P is the base address of the section containing the
6303 instruction plus the offset of the reloc into that
6304 section, ie:
6305 (input_section->output_section->vma +
6306 input_section->output_offset +
6307 rel->r_offset).
6308 A is the addend, converted into bytes, ie:
6309 (signed_addend * 4)
6310
6311 Note: None of these operations have knowledge of the pipeline
6312 size of the processor, thus it is up to the assembler to
6313 encode this information into the addend. */
6314 value -= (input_section->output_section->vma
6315 + input_section->output_offset);
6316 value -= rel->r_offset;
6317 if (globals->use_rel)
6318 value += (signed_addend << howto->size);
6319 else
6320 /* RELA addends do not have to be adjusted by howto->size. */
6321 value += signed_addend;
6322
6323 signed_addend = value;
6324 signed_addend >>= howto->rightshift;
6325
6326 /* A branch to an undefined weak symbol is turned into a jump to
6327 the next instruction unless a PLT entry will be created. */
6328 if (h && h->root.type == bfd_link_hash_undefweak
6329 && !(splt != NULL && h->plt.offset != (bfd_vma) -1))
6330 {
6331 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000)
6332 | 0x0affffff;
6333 }
6334 else
6335 {
6336 /* Perform a signed range check. */
6337 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
6338 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
6339 return bfd_reloc_overflow;
6340
6341 addend = (value & 2);
6342
6343 value = (signed_addend & howto->dst_mask)
6344 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
6345
6346 if (r_type == R_ARM_CALL)
6347 {
6348 /* Set the H bit in the BLX instruction. */
6349 if (sym_flags == STT_ARM_TFUNC)
6350 {
6351 if (addend)
6352 value |= (1 << 24);
6353 else
6354 value &= ~(bfd_vma)(1 << 24);
6355 }
6356
6357 /* Select the correct instruction (BL or BLX). */
6358 /* Only if we are not handling a BL to a stub. In this
6359 case, mode switching is performed by the stub. */
6360 if (sym_flags == STT_ARM_TFUNC && !stub_entry)
6361 value |= (1 << 28);
6362 else
6363 {
6364 value &= ~(bfd_vma)(1 << 28);
6365 value |= (1 << 24);
6366 }
6367 }
6368 }
6369 }
6370 break;
6371
6372 case R_ARM_ABS32:
6373 value += addend;
6374 if (sym_flags == STT_ARM_TFUNC)
6375 value |= 1;
6376 break;
6377
6378 case R_ARM_ABS32_NOI:
6379 value += addend;
6380 break;
6381
6382 case R_ARM_REL32:
6383 value += addend;
6384 if (sym_flags == STT_ARM_TFUNC)
6385 value |= 1;
6386 value -= (input_section->output_section->vma
6387 + input_section->output_offset + rel->r_offset);
6388 break;
6389
6390 case R_ARM_REL32_NOI:
6391 value += addend;
6392 value -= (input_section->output_section->vma
6393 + input_section->output_offset + rel->r_offset);
6394 break;
6395
6396 case R_ARM_PREL31:
6397 value -= (input_section->output_section->vma
6398 + input_section->output_offset + rel->r_offset);
6399 value += signed_addend;
6400 if (! h || h->root.type != bfd_link_hash_undefweak)
6401 {
6402 /* Check for overflow. */
6403 if ((value ^ (value >> 1)) & (1 << 30))
6404 return bfd_reloc_overflow;
6405 }
6406 value &= 0x7fffffff;
6407 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
6408 if (sym_flags == STT_ARM_TFUNC)
6409 value |= 1;
6410 break;
6411 }
6412
6413 bfd_put_32 (input_bfd, value, hit_data);
6414 return bfd_reloc_ok;
6415
6416 case R_ARM_ABS8:
6417 value += addend;
6418 if ((long) value > 0x7f || (long) value < -0x80)
6419 return bfd_reloc_overflow;
6420
6421 bfd_put_8 (input_bfd, value, hit_data);
6422 return bfd_reloc_ok;
6423
6424 case R_ARM_ABS16:
6425 value += addend;
6426
6427 if ((long) value > 0x7fff || (long) value < -0x8000)
6428 return bfd_reloc_overflow;
6429
6430 bfd_put_16 (input_bfd, value, hit_data);
6431 return bfd_reloc_ok;
6432
6433 case R_ARM_THM_ABS5:
6434 /* Support ldr and str instructions for the thumb. */
6435 if (globals->use_rel)
6436 {
6437 /* Need to refetch addend. */
6438 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6439 /* ??? Need to determine shift amount from operand size. */
6440 addend >>= howto->rightshift;
6441 }
6442 value += addend;
6443
6444 /* ??? Isn't value unsigned? */
6445 if ((long) value > 0x1f || (long) value < -0x10)
6446 return bfd_reloc_overflow;
6447
6448 /* ??? Value needs to be properly shifted into place first. */
6449 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
6450 bfd_put_16 (input_bfd, value, hit_data);
6451 return bfd_reloc_ok;
6452
6453 case R_ARM_THM_ALU_PREL_11_0:
6454 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
6455 {
6456 bfd_vma insn;
6457 bfd_signed_vma relocation;
6458
6459 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6460 | bfd_get_16 (input_bfd, hit_data + 2);
6461
6462 if (globals->use_rel)
6463 {
6464 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
6465 | ((insn & (1 << 26)) >> 15);
6466 if (insn & 0xf00000)
6467 signed_addend = -signed_addend;
6468 }
6469
6470 relocation = value + signed_addend;
6471 relocation -= (input_section->output_section->vma
6472 + input_section->output_offset
6473 + rel->r_offset);
6474
6475 value = abs (relocation);
6476
6477 if (value >= 0x1000)
6478 return bfd_reloc_overflow;
6479
6480 insn = (insn & 0xfb0f8f00) | (value & 0xff)
6481 | ((value & 0x700) << 4)
6482 | ((value & 0x800) << 15);
6483 if (relocation < 0)
6484 insn |= 0xa00000;
6485
6486 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6487 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6488
6489 return bfd_reloc_ok;
6490 }
6491
6492 case R_ARM_THM_PC12:
6493 /* Corresponds to: ldr.w reg, [pc, #offset]. */
6494 {
6495 bfd_vma insn;
6496 bfd_signed_vma relocation;
6497
6498 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6499 | bfd_get_16 (input_bfd, hit_data + 2);
6500
6501 if (globals->use_rel)
6502 {
6503 signed_addend = insn & 0xfff;
6504 if (!(insn & (1 << 23)))
6505 signed_addend = -signed_addend;
6506 }
6507
6508 relocation = value + signed_addend;
6509 relocation -= (input_section->output_section->vma
6510 + input_section->output_offset
6511 + rel->r_offset);
6512
6513 value = abs (relocation);
6514
6515 if (value >= 0x1000)
6516 return bfd_reloc_overflow;
6517
6518 insn = (insn & 0xff7ff000) | value;
6519 if (relocation >= 0)
6520 insn |= (1 << 23);
6521
6522 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6523 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6524
6525 return bfd_reloc_ok;
6526 }
6527
6528 case R_ARM_THM_XPC22:
6529 case R_ARM_THM_CALL:
6530 case R_ARM_THM_JUMP24:
6531 /* Thumb BL (branch long instruction). */
6532 {
6533 bfd_vma relocation;
6534 bfd_vma reloc_sign;
6535 bfd_boolean overflow = FALSE;
6536 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6537 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6538 bfd_signed_vma reloc_signed_max;
6539 bfd_signed_vma reloc_signed_min;
6540 bfd_vma check;
6541 bfd_signed_vma signed_check;
6542 int bitsize;
6543 int thumb2 = using_thumb2 (globals);
6544
6545 /* A branch to an undefined weak symbol is turned into a jump to
6546 the next instruction unless a PLT entry will be created. */
6547 if (h && h->root.type == bfd_link_hash_undefweak
6548 && !(splt != NULL && h->plt.offset != (bfd_vma) -1))
6549 {
6550 bfd_put_16 (input_bfd, 0xe000, hit_data);
6551 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
6552 return bfd_reloc_ok;
6553 }
6554
6555 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
6556 with Thumb-1) involving the J1 and J2 bits. */
6557 if (globals->use_rel)
6558 {
6559 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
6560 bfd_vma upper = upper_insn & 0x3ff;
6561 bfd_vma lower = lower_insn & 0x7ff;
6562 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
6563 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
6564 bfd_vma i1 = j1 ^ s ? 0 : 1;
6565 bfd_vma i2 = j2 ^ s ? 0 : 1;
6566
6567 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
6568 /* Sign extend. */
6569 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
6570
6571 signed_addend = addend;
6572 }
6573
6574 if (r_type == R_ARM_THM_XPC22)
6575 {
6576 /* Check for Thumb to Thumb call. */
6577 /* FIXME: Should we translate the instruction into a BL
6578 instruction instead ? */
6579 if (sym_flags == STT_ARM_TFUNC)
6580 (*_bfd_error_handler)
6581 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
6582 input_bfd,
6583 h ? h->root.root.string : "(local)");
6584 }
6585 else
6586 {
6587 /* If it is not a call to Thumb, assume call to Arm.
6588 If it is a call relative to a section name, then it is not a
6589 function call at all, but rather a long jump. Calls through
6590 the PLT do not require stubs. */
6591 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
6592 && (h == NULL || splt == NULL
6593 || h->plt.offset == (bfd_vma) -1))
6594 {
6595 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6596 {
6597 /* Convert BL to BLX. */
6598 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6599 }
6600 else if (( r_type != R_ARM_THM_CALL)
6601 && (r_type != R_ARM_THM_JUMP24))
6602 {
6603 if (elf32_thumb_to_arm_stub
6604 (info, sym_name, input_bfd, output_bfd, input_section,
6605 hit_data, sym_sec, rel->r_offset, signed_addend, value,
6606 error_message))
6607 return bfd_reloc_ok;
6608 else
6609 return bfd_reloc_dangerous;
6610 }
6611 }
6612 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
6613 && r_type == R_ARM_THM_CALL)
6614 {
6615 /* Make sure this is a BL. */
6616 lower_insn |= 0x1800;
6617 }
6618 }
6619
6620 /* Handle calls via the PLT. */
6621 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6622 {
6623 value = (splt->output_section->vma
6624 + splt->output_offset
6625 + h->plt.offset);
6626 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6627 {
6628 /* If the Thumb BLX instruction is available, convert the
6629 BL to a BLX instruction to call the ARM-mode PLT entry. */
6630 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6631 }
6632 else
6633 /* Target the Thumb stub before the ARM PLT entry. */
6634 value -= PLT_THUMB_STUB_SIZE;
6635 *unresolved_reloc_p = FALSE;
6636 }
6637
6638 if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24)
6639 {
6640 /* Check if a stub has to be inserted because the destination
6641 is too far. */
6642 bfd_vma from;
6643 bfd_signed_vma branch_offset;
6644 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6645
6646 from = (input_section->output_section->vma
6647 + input_section->output_offset
6648 + rel->r_offset);
6649 branch_offset = (bfd_signed_vma)(value - from);
6650
6651 if ((!thumb2
6652 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
6653 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
6654 ||
6655 (thumb2
6656 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
6657 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
6658 || ((sym_flags != STT_ARM_TFUNC)
6659 && (((r_type == R_ARM_THM_CALL) && !globals->use_blx)
6660 || r_type == R_ARM_THM_JUMP24)))
6661 {
6662 /* The target is out of reach or we are changing modes, so
6663 redirect the branch to the local stub for this
6664 function. */
6665 stub_entry = elf32_arm_get_stub_entry (input_section,
6666 sym_sec, h,
6667 rel, globals);
6668 if (stub_entry != NULL)
6669 value = (stub_entry->stub_offset
6670 + stub_entry->stub_sec->output_offset
6671 + stub_entry->stub_sec->output_section->vma);
6672
6673 /* If this call becomes a call to Arm, force BLX. */
6674 if (globals->use_blx && (r_type == R_ARM_THM_CALL))
6675 {
6676 if ((stub_entry
6677 && !arm_stub_is_thumb (stub_entry->stub_type))
6678 || (sym_flags != STT_ARM_TFUNC))
6679 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6680 }
6681 }
6682 }
6683
6684 relocation = value + signed_addend;
6685
6686 relocation -= (input_section->output_section->vma
6687 + input_section->output_offset
6688 + rel->r_offset);
6689
6690 check = relocation >> howto->rightshift;
6691
6692 /* If this is a signed value, the rightshift just dropped
6693 leading 1 bits (assuming twos complement). */
6694 if ((bfd_signed_vma) relocation >= 0)
6695 signed_check = check;
6696 else
6697 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
6698
6699 /* Calculate the permissable maximum and minimum values for
6700 this relocation according to whether we're relocating for
6701 Thumb-2 or not. */
6702 bitsize = howto->bitsize;
6703 if (!thumb2)
6704 bitsize -= 2;
6705 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
6706 reloc_signed_min = ~reloc_signed_max;
6707
6708 /* Assumes two's complement. */
6709 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6710 overflow = TRUE;
6711
6712 if ((lower_insn & 0x5000) == 0x4000)
6713 /* For a BLX instruction, make sure that the relocation is rounded up
6714 to a word boundary. This follows the semantics of the instruction
6715 which specifies that bit 1 of the target address will come from bit
6716 1 of the base address. */
6717 relocation = (relocation + 2) & ~ 3;
6718
6719 /* Put RELOCATION back into the insn. Assumes two's complement.
6720 We use the Thumb-2 encoding, which is safe even if dealing with
6721 a Thumb-1 instruction by virtue of our overflow check above. */
6722 reloc_sign = (signed_check < 0) ? 1 : 0;
6723 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
6724 | ((relocation >> 12) & 0x3ff)
6725 | (reloc_sign << 10);
6726 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
6727 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
6728 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
6729 | ((relocation >> 1) & 0x7ff);
6730
6731 /* Put the relocated value back in the object file: */
6732 bfd_put_16 (input_bfd, upper_insn, hit_data);
6733 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6734
6735 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6736 }
6737 break;
6738
6739 case R_ARM_THM_JUMP19:
6740 /* Thumb32 conditional branch instruction. */
6741 {
6742 bfd_vma relocation;
6743 bfd_boolean overflow = FALSE;
6744 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6745 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6746 bfd_signed_vma reloc_signed_max = 0xffffe;
6747 bfd_signed_vma reloc_signed_min = -0x100000;
6748 bfd_signed_vma signed_check;
6749
6750 /* Need to refetch the addend, reconstruct the top three bits,
6751 and squish the two 11 bit pieces together. */
6752 if (globals->use_rel)
6753 {
6754 bfd_vma S = (upper_insn & 0x0400) >> 10;
6755 bfd_vma upper = (upper_insn & 0x003f);
6756 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
6757 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
6758 bfd_vma lower = (lower_insn & 0x07ff);
6759
6760 upper |= J1 << 6;
6761 upper |= J2 << 7;
6762 upper |= (!S) << 8;
6763 upper -= 0x0100; /* Sign extend. */
6764
6765 addend = (upper << 12) | (lower << 1);
6766 signed_addend = addend;
6767 }
6768
6769 /* Handle calls via the PLT. */
6770 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6771 {
6772 value = (splt->output_section->vma
6773 + splt->output_offset
6774 + h->plt.offset);
6775 /* Target the Thumb stub before the ARM PLT entry. */
6776 value -= PLT_THUMB_STUB_SIZE;
6777 *unresolved_reloc_p = FALSE;
6778 }
6779
6780 /* ??? Should handle interworking? GCC might someday try to
6781 use this for tail calls. */
6782
6783 relocation = value + signed_addend;
6784 relocation -= (input_section->output_section->vma
6785 + input_section->output_offset
6786 + rel->r_offset);
6787 signed_check = (bfd_signed_vma) relocation;
6788
6789 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6790 overflow = TRUE;
6791
6792 /* Put RELOCATION back into the insn. */
6793 {
6794 bfd_vma S = (relocation & 0x00100000) >> 20;
6795 bfd_vma J2 = (relocation & 0x00080000) >> 19;
6796 bfd_vma J1 = (relocation & 0x00040000) >> 18;
6797 bfd_vma hi = (relocation & 0x0003f000) >> 12;
6798 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
6799
6800 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
6801 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
6802 }
6803
6804 /* Put the relocated value back in the object file: */
6805 bfd_put_16 (input_bfd, upper_insn, hit_data);
6806 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6807
6808 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6809 }
6810
6811 case R_ARM_THM_JUMP11:
6812 case R_ARM_THM_JUMP8:
6813 case R_ARM_THM_JUMP6:
6814 /* Thumb B (branch) instruction). */
6815 {
6816 bfd_signed_vma relocation;
6817 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
6818 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
6819 bfd_signed_vma signed_check;
6820
6821 /* CZB cannot jump backward. */
6822 if (r_type == R_ARM_THM_JUMP6)
6823 reloc_signed_min = 0;
6824
6825 if (globals->use_rel)
6826 {
6827 /* Need to refetch addend. */
6828 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6829 if (addend & ((howto->src_mask + 1) >> 1))
6830 {
6831 signed_addend = -1;
6832 signed_addend &= ~ howto->src_mask;
6833 signed_addend |= addend;
6834 }
6835 else
6836 signed_addend = addend;
6837 /* The value in the insn has been right shifted. We need to
6838 undo this, so that we can perform the address calculation
6839 in terms of bytes. */
6840 signed_addend <<= howto->rightshift;
6841 }
6842 relocation = value + signed_addend;
6843
6844 relocation -= (input_section->output_section->vma
6845 + input_section->output_offset
6846 + rel->r_offset);
6847
6848 relocation >>= howto->rightshift;
6849 signed_check = relocation;
6850
6851 if (r_type == R_ARM_THM_JUMP6)
6852 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
6853 else
6854 relocation &= howto->dst_mask;
6855 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
6856
6857 bfd_put_16 (input_bfd, relocation, hit_data);
6858
6859 /* Assumes two's complement. */
6860 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6861 return bfd_reloc_overflow;
6862
6863 return bfd_reloc_ok;
6864 }
6865
6866 case R_ARM_ALU_PCREL7_0:
6867 case R_ARM_ALU_PCREL15_8:
6868 case R_ARM_ALU_PCREL23_15:
6869 {
6870 bfd_vma insn;
6871 bfd_vma relocation;
6872
6873 insn = bfd_get_32 (input_bfd, hit_data);
6874 if (globals->use_rel)
6875 {
6876 /* Extract the addend. */
6877 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
6878 signed_addend = addend;
6879 }
6880 relocation = value + signed_addend;
6881
6882 relocation -= (input_section->output_section->vma
6883 + input_section->output_offset
6884 + rel->r_offset);
6885 insn = (insn & ~0xfff)
6886 | ((howto->bitpos << 7) & 0xf00)
6887 | ((relocation >> howto->bitpos) & 0xff);
6888 bfd_put_32 (input_bfd, value, hit_data);
6889 }
6890 return bfd_reloc_ok;
6891
6892 case R_ARM_GNU_VTINHERIT:
6893 case R_ARM_GNU_VTENTRY:
6894 return bfd_reloc_ok;
6895
6896 case R_ARM_GOTOFF32:
6897 /* Relocation is relative to the start of the
6898 global offset table. */
6899
6900 BFD_ASSERT (sgot != NULL);
6901 if (sgot == NULL)
6902 return bfd_reloc_notsupported;
6903
6904 /* If we are addressing a Thumb function, we need to adjust the
6905 address by one, so that attempts to call the function pointer will
6906 correctly interpret it as Thumb code. */
6907 if (sym_flags == STT_ARM_TFUNC)
6908 value += 1;
6909
6910 /* Note that sgot->output_offset is not involved in this
6911 calculation. We always want the start of .got. If we
6912 define _GLOBAL_OFFSET_TABLE in a different way, as is
6913 permitted by the ABI, we might have to change this
6914 calculation. */
6915 value -= sgot->output_section->vma;
6916 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6917 contents, rel->r_offset, value,
6918 rel->r_addend);
6919
6920 case R_ARM_GOTPC:
6921 /* Use global offset table as symbol value. */
6922 BFD_ASSERT (sgot != NULL);
6923
6924 if (sgot == NULL)
6925 return bfd_reloc_notsupported;
6926
6927 *unresolved_reloc_p = FALSE;
6928 value = sgot->output_section->vma;
6929 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6930 contents, rel->r_offset, value,
6931 rel->r_addend);
6932
6933 case R_ARM_GOT32:
6934 case R_ARM_GOT_PREL:
6935 /* Relocation is to the entry for this symbol in the
6936 global offset table. */
6937 if (sgot == NULL)
6938 return bfd_reloc_notsupported;
6939
6940 if (h != NULL)
6941 {
6942 bfd_vma off;
6943 bfd_boolean dyn;
6944
6945 off = h->got.offset;
6946 BFD_ASSERT (off != (bfd_vma) -1);
6947 dyn = globals->root.dynamic_sections_created;
6948
6949 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6950 || (info->shared
6951 && SYMBOL_REFERENCES_LOCAL (info, h))
6952 || (ELF_ST_VISIBILITY (h->other)
6953 && h->root.type == bfd_link_hash_undefweak))
6954 {
6955 /* This is actually a static link, or it is a -Bsymbolic link
6956 and the symbol is defined locally. We must initialize this
6957 entry in the global offset table. Since the offset must
6958 always be a multiple of 4, we use the least significant bit
6959 to record whether we have initialized it already.
6960
6961 When doing a dynamic link, we create a .rel(a).got relocation
6962 entry to initialize the value. This is done in the
6963 finish_dynamic_symbol routine. */
6964 if ((off & 1) != 0)
6965 off &= ~1;
6966 else
6967 {
6968 /* If we are addressing a Thumb function, we need to
6969 adjust the address by one, so that attempts to
6970 call the function pointer will correctly
6971 interpret it as Thumb code. */
6972 if (sym_flags == STT_ARM_TFUNC)
6973 value |= 1;
6974
6975 bfd_put_32 (output_bfd, value, sgot->contents + off);
6976 h->got.offset |= 1;
6977 }
6978 }
6979 else
6980 *unresolved_reloc_p = FALSE;
6981
6982 value = sgot->output_offset + off;
6983 }
6984 else
6985 {
6986 bfd_vma off;
6987
6988 BFD_ASSERT (local_got_offsets != NULL &&
6989 local_got_offsets[r_symndx] != (bfd_vma) -1);
6990
6991 off = local_got_offsets[r_symndx];
6992
6993 /* The offset must always be a multiple of 4. We use the
6994 least significant bit to record whether we have already
6995 generated the necessary reloc. */
6996 if ((off & 1) != 0)
6997 off &= ~1;
6998 else
6999 {
7000 /* If we are addressing a Thumb function, we need to
7001 adjust the address by one, so that attempts to
7002 call the function pointer will correctly
7003 interpret it as Thumb code. */
7004 if (sym_flags == STT_ARM_TFUNC)
7005 value |= 1;
7006
7007 if (globals->use_rel)
7008 bfd_put_32 (output_bfd, value, sgot->contents + off);
7009
7010 if (info->shared)
7011 {
7012 asection * srelgot;
7013 Elf_Internal_Rela outrel;
7014 bfd_byte *loc;
7015
7016 srelgot = (bfd_get_section_by_name
7017 (dynobj, RELOC_SECTION (globals, ".got")));
7018 BFD_ASSERT (srelgot != NULL);
7019
7020 outrel.r_addend = addend + value;
7021 outrel.r_offset = (sgot->output_section->vma
7022 + sgot->output_offset
7023 + off);
7024 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
7025 loc = srelgot->contents;
7026 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
7027 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7028 }
7029
7030 local_got_offsets[r_symndx] |= 1;
7031 }
7032
7033 value = sgot->output_offset + off;
7034 }
7035 if (r_type != R_ARM_GOT32)
7036 value += sgot->output_section->vma;
7037
7038 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7039 contents, rel->r_offset, value,
7040 rel->r_addend);
7041
7042 case R_ARM_TLS_LDO32:
7043 value = value - dtpoff_base (info);
7044
7045 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7046 contents, rel->r_offset, value,
7047 rel->r_addend);
7048
7049 case R_ARM_TLS_LDM32:
7050 {
7051 bfd_vma off;
7052
7053 if (globals->sgot == NULL)
7054 abort ();
7055
7056 off = globals->tls_ldm_got.offset;
7057
7058 if ((off & 1) != 0)
7059 off &= ~1;
7060 else
7061 {
7062 /* If we don't know the module number, create a relocation
7063 for it. */
7064 if (info->shared)
7065 {
7066 Elf_Internal_Rela outrel;
7067 bfd_byte *loc;
7068
7069 if (globals->srelgot == NULL)
7070 abort ();
7071
7072 outrel.r_addend = 0;
7073 outrel.r_offset = (globals->sgot->output_section->vma
7074 + globals->sgot->output_offset + off);
7075 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
7076
7077 if (globals->use_rel)
7078 bfd_put_32 (output_bfd, outrel.r_addend,
7079 globals->sgot->contents + off);
7080
7081 loc = globals->srelgot->contents;
7082 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
7083 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7084 }
7085 else
7086 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
7087
7088 globals->tls_ldm_got.offset |= 1;
7089 }
7090
7091 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
7092 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
7093
7094 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7095 contents, rel->r_offset, value,
7096 rel->r_addend);
7097 }
7098
7099 case R_ARM_TLS_GD32:
7100 case R_ARM_TLS_IE32:
7101 {
7102 bfd_vma off;
7103 int indx;
7104 char tls_type;
7105
7106 if (globals->sgot == NULL)
7107 abort ();
7108
7109 indx = 0;
7110 if (h != NULL)
7111 {
7112 bfd_boolean dyn;
7113 dyn = globals->root.dynamic_sections_created;
7114 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7115 && (!info->shared
7116 || !SYMBOL_REFERENCES_LOCAL (info, h)))
7117 {
7118 *unresolved_reloc_p = FALSE;
7119 indx = h->dynindx;
7120 }
7121 off = h->got.offset;
7122 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
7123 }
7124 else
7125 {
7126 if (local_got_offsets == NULL)
7127 abort ();
7128 off = local_got_offsets[r_symndx];
7129 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
7130 }
7131
7132 if (tls_type == GOT_UNKNOWN)
7133 abort ();
7134
7135 if ((off & 1) != 0)
7136 off &= ~1;
7137 else
7138 {
7139 bfd_boolean need_relocs = FALSE;
7140 Elf_Internal_Rela outrel;
7141 bfd_byte *loc = NULL;
7142 int cur_off = off;
7143
7144 /* The GOT entries have not been initialized yet. Do it
7145 now, and emit any relocations. If both an IE GOT and a
7146 GD GOT are necessary, we emit the GD first. */
7147
7148 if ((info->shared || indx != 0)
7149 && (h == NULL
7150 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7151 || h->root.type != bfd_link_hash_undefweak))
7152 {
7153 need_relocs = TRUE;
7154 if (globals->srelgot == NULL)
7155 abort ();
7156 loc = globals->srelgot->contents;
7157 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
7158 }
7159
7160 if (tls_type & GOT_TLS_GD)
7161 {
7162 if (need_relocs)
7163 {
7164 outrel.r_addend = 0;
7165 outrel.r_offset = (globals->sgot->output_section->vma
7166 + globals->sgot->output_offset
7167 + cur_off);
7168 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
7169
7170 if (globals->use_rel)
7171 bfd_put_32 (output_bfd, outrel.r_addend,
7172 globals->sgot->contents + cur_off);
7173
7174 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7175 globals->srelgot->reloc_count++;
7176 loc += RELOC_SIZE (globals);
7177
7178 if (indx == 0)
7179 bfd_put_32 (output_bfd, value - dtpoff_base (info),
7180 globals->sgot->contents + cur_off + 4);
7181 else
7182 {
7183 outrel.r_addend = 0;
7184 outrel.r_info = ELF32_R_INFO (indx,
7185 R_ARM_TLS_DTPOFF32);
7186 outrel.r_offset += 4;
7187
7188 if (globals->use_rel)
7189 bfd_put_32 (output_bfd, outrel.r_addend,
7190 globals->sgot->contents + cur_off + 4);
7191
7192
7193 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7194 globals->srelgot->reloc_count++;
7195 loc += RELOC_SIZE (globals);
7196 }
7197 }
7198 else
7199 {
7200 /* If we are not emitting relocations for a
7201 general dynamic reference, then we must be in a
7202 static link or an executable link with the
7203 symbol binding locally. Mark it as belonging
7204 to module 1, the executable. */
7205 bfd_put_32 (output_bfd, 1,
7206 globals->sgot->contents + cur_off);
7207 bfd_put_32 (output_bfd, value - dtpoff_base (info),
7208 globals->sgot->contents + cur_off + 4);
7209 }
7210
7211 cur_off += 8;
7212 }
7213
7214 if (tls_type & GOT_TLS_IE)
7215 {
7216 if (need_relocs)
7217 {
7218 if (indx == 0)
7219 outrel.r_addend = value - dtpoff_base (info);
7220 else
7221 outrel.r_addend = 0;
7222 outrel.r_offset = (globals->sgot->output_section->vma
7223 + globals->sgot->output_offset
7224 + cur_off);
7225 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
7226
7227 if (globals->use_rel)
7228 bfd_put_32 (output_bfd, outrel.r_addend,
7229 globals->sgot->contents + cur_off);
7230
7231 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7232 globals->srelgot->reloc_count++;
7233 loc += RELOC_SIZE (globals);
7234 }
7235 else
7236 bfd_put_32 (output_bfd, tpoff (info, value),
7237 globals->sgot->contents + cur_off);
7238 cur_off += 4;
7239 }
7240
7241 if (h != NULL)
7242 h->got.offset |= 1;
7243 else
7244 local_got_offsets[r_symndx] |= 1;
7245 }
7246
7247 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
7248 off += 8;
7249 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
7250 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
7251
7252 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7253 contents, rel->r_offset, value,
7254 rel->r_addend);
7255 }
7256
7257 case R_ARM_TLS_LE32:
7258 if (info->shared)
7259 {
7260 (*_bfd_error_handler)
7261 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
7262 input_bfd, input_section,
7263 (long) rel->r_offset, howto->name);
7264 return FALSE;
7265 }
7266 else
7267 value = tpoff (info, value);
7268
7269 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7270 contents, rel->r_offset, value,
7271 rel->r_addend);
7272
7273 case R_ARM_V4BX:
7274 if (globals->fix_v4bx)
7275 {
7276 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7277
7278 /* Ensure that we have a BX instruction. */
7279 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
7280
7281 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
7282 {
7283 /* Branch to veneer. */
7284 bfd_vma glue_addr;
7285 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
7286 glue_addr -= input_section->output_section->vma
7287 + input_section->output_offset
7288 + rel->r_offset + 8;
7289 insn = (insn & 0xf0000000) | 0x0a000000
7290 | ((glue_addr >> 2) & 0x00ffffff);
7291 }
7292 else
7293 {
7294 /* Preserve Rm (lowest four bits) and the condition code
7295 (highest four bits). Other bits encode MOV PC,Rm. */
7296 insn = (insn & 0xf000000f) | 0x01a0f000;
7297 }
7298
7299 bfd_put_32 (input_bfd, insn, hit_data);
7300 }
7301 return bfd_reloc_ok;
7302
7303 case R_ARM_MOVW_ABS_NC:
7304 case R_ARM_MOVT_ABS:
7305 case R_ARM_MOVW_PREL_NC:
7306 case R_ARM_MOVT_PREL:
7307 /* Until we properly support segment-base-relative addressing then
7308 we assume the segment base to be zero, as for the group relocations.
7309 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
7310 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
7311 case R_ARM_MOVW_BREL_NC:
7312 case R_ARM_MOVW_BREL:
7313 case R_ARM_MOVT_BREL:
7314 {
7315 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7316
7317 if (globals->use_rel)
7318 {
7319 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
7320 signed_addend = (addend ^ 0x8000) - 0x8000;
7321 }
7322
7323 value += signed_addend;
7324
7325 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
7326 value -= (input_section->output_section->vma
7327 + input_section->output_offset + rel->r_offset);
7328
7329 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
7330 return bfd_reloc_overflow;
7331
7332 if (sym_flags == STT_ARM_TFUNC)
7333 value |= 1;
7334
7335 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
7336 || r_type == R_ARM_MOVT_BREL)
7337 value >>= 16;
7338
7339 insn &= 0xfff0f000;
7340 insn |= value & 0xfff;
7341 insn |= (value & 0xf000) << 4;
7342 bfd_put_32 (input_bfd, insn, hit_data);
7343 }
7344 return bfd_reloc_ok;
7345
7346 case R_ARM_THM_MOVW_ABS_NC:
7347 case R_ARM_THM_MOVT_ABS:
7348 case R_ARM_THM_MOVW_PREL_NC:
7349 case R_ARM_THM_MOVT_PREL:
7350 /* Until we properly support segment-base-relative addressing then
7351 we assume the segment base to be zero, as for the above relocations.
7352 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
7353 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
7354 as R_ARM_THM_MOVT_ABS. */
7355 case R_ARM_THM_MOVW_BREL_NC:
7356 case R_ARM_THM_MOVW_BREL:
7357 case R_ARM_THM_MOVT_BREL:
7358 {
7359 bfd_vma insn;
7360
7361 insn = bfd_get_16 (input_bfd, hit_data) << 16;
7362 insn |= bfd_get_16 (input_bfd, hit_data + 2);
7363
7364 if (globals->use_rel)
7365 {
7366 addend = ((insn >> 4) & 0xf000)
7367 | ((insn >> 15) & 0x0800)
7368 | ((insn >> 4) & 0x0700)
7369 | (insn & 0x00ff);
7370 signed_addend = (addend ^ 0x8000) - 0x8000;
7371 }
7372
7373 value += signed_addend;
7374
7375 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
7376 value -= (input_section->output_section->vma
7377 + input_section->output_offset + rel->r_offset);
7378
7379 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
7380 return bfd_reloc_overflow;
7381
7382 if (sym_flags == STT_ARM_TFUNC)
7383 value |= 1;
7384
7385 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
7386 || r_type == R_ARM_THM_MOVT_BREL)
7387 value >>= 16;
7388
7389 insn &= 0xfbf08f00;
7390 insn |= (value & 0xf000) << 4;
7391 insn |= (value & 0x0800) << 15;
7392 insn |= (value & 0x0700) << 4;
7393 insn |= (value & 0x00ff);
7394
7395 bfd_put_16 (input_bfd, insn >> 16, hit_data);
7396 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
7397 }
7398 return bfd_reloc_ok;
7399
7400 case R_ARM_ALU_PC_G0_NC:
7401 case R_ARM_ALU_PC_G1_NC:
7402 case R_ARM_ALU_PC_G0:
7403 case R_ARM_ALU_PC_G1:
7404 case R_ARM_ALU_PC_G2:
7405 case R_ARM_ALU_SB_G0_NC:
7406 case R_ARM_ALU_SB_G1_NC:
7407 case R_ARM_ALU_SB_G0:
7408 case R_ARM_ALU_SB_G1:
7409 case R_ARM_ALU_SB_G2:
7410 {
7411 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7412 bfd_vma pc = input_section->output_section->vma
7413 + input_section->output_offset + rel->r_offset;
7414 /* sb should be the origin of the *segment* containing the symbol.
7415 It is not clear how to obtain this OS-dependent value, so we
7416 make an arbitrary choice of zero. */
7417 bfd_vma sb = 0;
7418 bfd_vma residual;
7419 bfd_vma g_n;
7420 bfd_signed_vma signed_value;
7421 int group = 0;
7422
7423 /* Determine which group of bits to select. */
7424 switch (r_type)
7425 {
7426 case R_ARM_ALU_PC_G0_NC:
7427 case R_ARM_ALU_PC_G0:
7428 case R_ARM_ALU_SB_G0_NC:
7429 case R_ARM_ALU_SB_G0:
7430 group = 0;
7431 break;
7432
7433 case R_ARM_ALU_PC_G1_NC:
7434 case R_ARM_ALU_PC_G1:
7435 case R_ARM_ALU_SB_G1_NC:
7436 case R_ARM_ALU_SB_G1:
7437 group = 1;
7438 break;
7439
7440 case R_ARM_ALU_PC_G2:
7441 case R_ARM_ALU_SB_G2:
7442 group = 2;
7443 break;
7444
7445 default:
7446 abort ();
7447 }
7448
7449 /* If REL, extract the addend from the insn. If RELA, it will
7450 have already been fetched for us. */
7451 if (globals->use_rel)
7452 {
7453 int negative;
7454 bfd_vma constant = insn & 0xff;
7455 bfd_vma rotation = (insn & 0xf00) >> 8;
7456
7457 if (rotation == 0)
7458 signed_addend = constant;
7459 else
7460 {
7461 /* Compensate for the fact that in the instruction, the
7462 rotation is stored in multiples of 2 bits. */
7463 rotation *= 2;
7464
7465 /* Rotate "constant" right by "rotation" bits. */
7466 signed_addend = (constant >> rotation) |
7467 (constant << (8 * sizeof (bfd_vma) - rotation));
7468 }
7469
7470 /* Determine if the instruction is an ADD or a SUB.
7471 (For REL, this determines the sign of the addend.) */
7472 negative = identify_add_or_sub (insn);
7473 if (negative == 0)
7474 {
7475 (*_bfd_error_handler)
7476 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
7477 input_bfd, input_section,
7478 (long) rel->r_offset, howto->name);
7479 return bfd_reloc_overflow;
7480 }
7481
7482 signed_addend *= negative;
7483 }
7484
7485 /* Compute the value (X) to go in the place. */
7486 if (r_type == R_ARM_ALU_PC_G0_NC
7487 || r_type == R_ARM_ALU_PC_G1_NC
7488 || r_type == R_ARM_ALU_PC_G0
7489 || r_type == R_ARM_ALU_PC_G1
7490 || r_type == R_ARM_ALU_PC_G2)
7491 /* PC relative. */
7492 signed_value = value - pc + signed_addend;
7493 else
7494 /* Section base relative. */
7495 signed_value = value - sb + signed_addend;
7496
7497 /* If the target symbol is a Thumb function, then set the
7498 Thumb bit in the address. */
7499 if (sym_flags == STT_ARM_TFUNC)
7500 signed_value |= 1;
7501
7502 /* Calculate the value of the relevant G_n, in encoded
7503 constant-with-rotation format. */
7504 g_n = calculate_group_reloc_mask (abs (signed_value), group,
7505 &residual);
7506
7507 /* Check for overflow if required. */
7508 if ((r_type == R_ARM_ALU_PC_G0
7509 || r_type == R_ARM_ALU_PC_G1
7510 || r_type == R_ARM_ALU_PC_G2
7511 || r_type == R_ARM_ALU_SB_G0
7512 || r_type == R_ARM_ALU_SB_G1
7513 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
7514 {
7515 (*_bfd_error_handler)
7516 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7517 input_bfd, input_section,
7518 (long) rel->r_offset, abs (signed_value), howto->name);
7519 return bfd_reloc_overflow;
7520 }
7521
7522 /* Mask out the value and the ADD/SUB part of the opcode; take care
7523 not to destroy the S bit. */
7524 insn &= 0xff1ff000;
7525
7526 /* Set the opcode according to whether the value to go in the
7527 place is negative. */
7528 if (signed_value < 0)
7529 insn |= 1 << 22;
7530 else
7531 insn |= 1 << 23;
7532
7533 /* Encode the offset. */
7534 insn |= g_n;
7535
7536 bfd_put_32 (input_bfd, insn, hit_data);
7537 }
7538 return bfd_reloc_ok;
7539
7540 case R_ARM_LDR_PC_G0:
7541 case R_ARM_LDR_PC_G1:
7542 case R_ARM_LDR_PC_G2:
7543 case R_ARM_LDR_SB_G0:
7544 case R_ARM_LDR_SB_G1:
7545 case R_ARM_LDR_SB_G2:
7546 {
7547 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7548 bfd_vma pc = input_section->output_section->vma
7549 + input_section->output_offset + rel->r_offset;
7550 bfd_vma sb = 0; /* See note above. */
7551 bfd_vma residual;
7552 bfd_signed_vma signed_value;
7553 int group = 0;
7554
7555 /* Determine which groups of bits to calculate. */
7556 switch (r_type)
7557 {
7558 case R_ARM_LDR_PC_G0:
7559 case R_ARM_LDR_SB_G0:
7560 group = 0;
7561 break;
7562
7563 case R_ARM_LDR_PC_G1:
7564 case R_ARM_LDR_SB_G1:
7565 group = 1;
7566 break;
7567
7568 case R_ARM_LDR_PC_G2:
7569 case R_ARM_LDR_SB_G2:
7570 group = 2;
7571 break;
7572
7573 default:
7574 abort ();
7575 }
7576
7577 /* If REL, extract the addend from the insn. If RELA, it will
7578 have already been fetched for us. */
7579 if (globals->use_rel)
7580 {
7581 int negative = (insn & (1 << 23)) ? 1 : -1;
7582 signed_addend = negative * (insn & 0xfff);
7583 }
7584
7585 /* Compute the value (X) to go in the place. */
7586 if (r_type == R_ARM_LDR_PC_G0
7587 || r_type == R_ARM_LDR_PC_G1
7588 || r_type == R_ARM_LDR_PC_G2)
7589 /* PC relative. */
7590 signed_value = value - pc + signed_addend;
7591 else
7592 /* Section base relative. */
7593 signed_value = value - sb + signed_addend;
7594
7595 /* Calculate the value of the relevant G_{n-1} to obtain
7596 the residual at that stage. */
7597 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7598
7599 /* Check for overflow. */
7600 if (residual >= 0x1000)
7601 {
7602 (*_bfd_error_handler)
7603 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7604 input_bfd, input_section,
7605 (long) rel->r_offset, abs (signed_value), howto->name);
7606 return bfd_reloc_overflow;
7607 }
7608
7609 /* Mask out the value and U bit. */
7610 insn &= 0xff7ff000;
7611
7612 /* Set the U bit if the value to go in the place is non-negative. */
7613 if (signed_value >= 0)
7614 insn |= 1 << 23;
7615
7616 /* Encode the offset. */
7617 insn |= residual;
7618
7619 bfd_put_32 (input_bfd, insn, hit_data);
7620 }
7621 return bfd_reloc_ok;
7622
7623 case R_ARM_LDRS_PC_G0:
7624 case R_ARM_LDRS_PC_G1:
7625 case R_ARM_LDRS_PC_G2:
7626 case R_ARM_LDRS_SB_G0:
7627 case R_ARM_LDRS_SB_G1:
7628 case R_ARM_LDRS_SB_G2:
7629 {
7630 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7631 bfd_vma pc = input_section->output_section->vma
7632 + input_section->output_offset + rel->r_offset;
7633 bfd_vma sb = 0; /* See note above. */
7634 bfd_vma residual;
7635 bfd_signed_vma signed_value;
7636 int group = 0;
7637
7638 /* Determine which groups of bits to calculate. */
7639 switch (r_type)
7640 {
7641 case R_ARM_LDRS_PC_G0:
7642 case R_ARM_LDRS_SB_G0:
7643 group = 0;
7644 break;
7645
7646 case R_ARM_LDRS_PC_G1:
7647 case R_ARM_LDRS_SB_G1:
7648 group = 1;
7649 break;
7650
7651 case R_ARM_LDRS_PC_G2:
7652 case R_ARM_LDRS_SB_G2:
7653 group = 2;
7654 break;
7655
7656 default:
7657 abort ();
7658 }
7659
7660 /* If REL, extract the addend from the insn. If RELA, it will
7661 have already been fetched for us. */
7662 if (globals->use_rel)
7663 {
7664 int negative = (insn & (1 << 23)) ? 1 : -1;
7665 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
7666 }
7667
7668 /* Compute the value (X) to go in the place. */
7669 if (r_type == R_ARM_LDRS_PC_G0
7670 || r_type == R_ARM_LDRS_PC_G1
7671 || r_type == R_ARM_LDRS_PC_G2)
7672 /* PC relative. */
7673 signed_value = value - pc + signed_addend;
7674 else
7675 /* Section base relative. */
7676 signed_value = value - sb + signed_addend;
7677
7678 /* Calculate the value of the relevant G_{n-1} to obtain
7679 the residual at that stage. */
7680 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7681
7682 /* Check for overflow. */
7683 if (residual >= 0x100)
7684 {
7685 (*_bfd_error_handler)
7686 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7687 input_bfd, input_section,
7688 (long) rel->r_offset, abs (signed_value), howto->name);
7689 return bfd_reloc_overflow;
7690 }
7691
7692 /* Mask out the value and U bit. */
7693 insn &= 0xff7ff0f0;
7694
7695 /* Set the U bit if the value to go in the place is non-negative. */
7696 if (signed_value >= 0)
7697 insn |= 1 << 23;
7698
7699 /* Encode the offset. */
7700 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
7701
7702 bfd_put_32 (input_bfd, insn, hit_data);
7703 }
7704 return bfd_reloc_ok;
7705
7706 case R_ARM_LDC_PC_G0:
7707 case R_ARM_LDC_PC_G1:
7708 case R_ARM_LDC_PC_G2:
7709 case R_ARM_LDC_SB_G0:
7710 case R_ARM_LDC_SB_G1:
7711 case R_ARM_LDC_SB_G2:
7712 {
7713 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7714 bfd_vma pc = input_section->output_section->vma
7715 + input_section->output_offset + rel->r_offset;
7716 bfd_vma sb = 0; /* See note above. */
7717 bfd_vma residual;
7718 bfd_signed_vma signed_value;
7719 int group = 0;
7720
7721 /* Determine which groups of bits to calculate. */
7722 switch (r_type)
7723 {
7724 case R_ARM_LDC_PC_G0:
7725 case R_ARM_LDC_SB_G0:
7726 group = 0;
7727 break;
7728
7729 case R_ARM_LDC_PC_G1:
7730 case R_ARM_LDC_SB_G1:
7731 group = 1;
7732 break;
7733
7734 case R_ARM_LDC_PC_G2:
7735 case R_ARM_LDC_SB_G2:
7736 group = 2;
7737 break;
7738
7739 default:
7740 abort ();
7741 }
7742
7743 /* If REL, extract the addend from the insn. If RELA, it will
7744 have already been fetched for us. */
7745 if (globals->use_rel)
7746 {
7747 int negative = (insn & (1 << 23)) ? 1 : -1;
7748 signed_addend = negative * ((insn & 0xff) << 2);
7749 }
7750
7751 /* Compute the value (X) to go in the place. */
7752 if (r_type == R_ARM_LDC_PC_G0
7753 || r_type == R_ARM_LDC_PC_G1
7754 || r_type == R_ARM_LDC_PC_G2)
7755 /* PC relative. */
7756 signed_value = value - pc + signed_addend;
7757 else
7758 /* Section base relative. */
7759 signed_value = value - sb + signed_addend;
7760
7761 /* Calculate the value of the relevant G_{n-1} to obtain
7762 the residual at that stage. */
7763 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7764
7765 /* Check for overflow. (The absolute value to go in the place must be
7766 divisible by four and, after having been divided by four, must
7767 fit in eight bits.) */
7768 if ((residual & 0x3) != 0 || residual >= 0x400)
7769 {
7770 (*_bfd_error_handler)
7771 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7772 input_bfd, input_section,
7773 (long) rel->r_offset, abs (signed_value), howto->name);
7774 return bfd_reloc_overflow;
7775 }
7776
7777 /* Mask out the value and U bit. */
7778 insn &= 0xff7fff00;
7779
7780 /* Set the U bit if the value to go in the place is non-negative. */
7781 if (signed_value >= 0)
7782 insn |= 1 << 23;
7783
7784 /* Encode the offset. */
7785 insn |= residual >> 2;
7786
7787 bfd_put_32 (input_bfd, insn, hit_data);
7788 }
7789 return bfd_reloc_ok;
7790
7791 default:
7792 return bfd_reloc_notsupported;
7793 }
7794 }
7795
7796 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
7797 static void
7798 arm_add_to_rel (bfd * abfd,
7799 bfd_byte * address,
7800 reloc_howto_type * howto,
7801 bfd_signed_vma increment)
7802 {
7803 bfd_signed_vma addend;
7804
7805 if (howto->type == R_ARM_THM_CALL
7806 || howto->type == R_ARM_THM_JUMP24)
7807 {
7808 int upper_insn, lower_insn;
7809 int upper, lower;
7810
7811 upper_insn = bfd_get_16 (abfd, address);
7812 lower_insn = bfd_get_16 (abfd, address + 2);
7813 upper = upper_insn & 0x7ff;
7814 lower = lower_insn & 0x7ff;
7815
7816 addend = (upper << 12) | (lower << 1);
7817 addend += increment;
7818 addend >>= 1;
7819
7820 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
7821 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
7822
7823 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
7824 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
7825 }
7826 else
7827 {
7828 bfd_vma contents;
7829
7830 contents = bfd_get_32 (abfd, address);
7831
7832 /* Get the (signed) value from the instruction. */
7833 addend = contents & howto->src_mask;
7834 if (addend & ((howto->src_mask + 1) >> 1))
7835 {
7836 bfd_signed_vma mask;
7837
7838 mask = -1;
7839 mask &= ~ howto->src_mask;
7840 addend |= mask;
7841 }
7842
7843 /* Add in the increment, (which is a byte value). */
7844 switch (howto->type)
7845 {
7846 default:
7847 addend += increment;
7848 break;
7849
7850 case R_ARM_PC24:
7851 case R_ARM_PLT32:
7852 case R_ARM_CALL:
7853 case R_ARM_JUMP24:
7854 addend <<= howto->size;
7855 addend += increment;
7856
7857 /* Should we check for overflow here ? */
7858
7859 /* Drop any undesired bits. */
7860 addend >>= howto->rightshift;
7861 break;
7862 }
7863
7864 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
7865
7866 bfd_put_32 (abfd, contents, address);
7867 }
7868 }
7869
7870 #define IS_ARM_TLS_RELOC(R_TYPE) \
7871 ((R_TYPE) == R_ARM_TLS_GD32 \
7872 || (R_TYPE) == R_ARM_TLS_LDO32 \
7873 || (R_TYPE) == R_ARM_TLS_LDM32 \
7874 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
7875 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
7876 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
7877 || (R_TYPE) == R_ARM_TLS_LE32 \
7878 || (R_TYPE) == R_ARM_TLS_IE32)
7879
7880 /* Relocate an ARM ELF section. */
7881
7882 static bfd_boolean
7883 elf32_arm_relocate_section (bfd * output_bfd,
7884 struct bfd_link_info * info,
7885 bfd * input_bfd,
7886 asection * input_section,
7887 bfd_byte * contents,
7888 Elf_Internal_Rela * relocs,
7889 Elf_Internal_Sym * local_syms,
7890 asection ** local_sections)
7891 {
7892 Elf_Internal_Shdr *symtab_hdr;
7893 struct elf_link_hash_entry **sym_hashes;
7894 Elf_Internal_Rela *rel;
7895 Elf_Internal_Rela *relend;
7896 const char *name;
7897 struct elf32_arm_link_hash_table * globals;
7898
7899 globals = elf32_arm_hash_table (info);
7900
7901 symtab_hdr = & elf_symtab_hdr (input_bfd);
7902 sym_hashes = elf_sym_hashes (input_bfd);
7903
7904 rel = relocs;
7905 relend = relocs + input_section->reloc_count;
7906 for (; rel < relend; rel++)
7907 {
7908 int r_type;
7909 reloc_howto_type * howto;
7910 unsigned long r_symndx;
7911 Elf_Internal_Sym * sym;
7912 asection * sec;
7913 struct elf_link_hash_entry * h;
7914 bfd_vma relocation;
7915 bfd_reloc_status_type r;
7916 arelent bfd_reloc;
7917 char sym_type;
7918 bfd_boolean unresolved_reloc = FALSE;
7919 char *error_message = NULL;
7920
7921 r_symndx = ELF32_R_SYM (rel->r_info);
7922 r_type = ELF32_R_TYPE (rel->r_info);
7923 r_type = arm_real_reloc_type (globals, r_type);
7924
7925 if ( r_type == R_ARM_GNU_VTENTRY
7926 || r_type == R_ARM_GNU_VTINHERIT)
7927 continue;
7928
7929 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
7930 howto = bfd_reloc.howto;
7931
7932 h = NULL;
7933 sym = NULL;
7934 sec = NULL;
7935
7936 if (r_symndx < symtab_hdr->sh_info)
7937 {
7938 sym = local_syms + r_symndx;
7939 sym_type = ELF32_ST_TYPE (sym->st_info);
7940 sec = local_sections[r_symndx];
7941 if (globals->use_rel)
7942 {
7943 relocation = (sec->output_section->vma
7944 + sec->output_offset
7945 + sym->st_value);
7946 if (!info->relocatable
7947 && (sec->flags & SEC_MERGE)
7948 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
7949 {
7950 asection *msec;
7951 bfd_vma addend, value;
7952
7953 switch (r_type)
7954 {
7955 case R_ARM_MOVW_ABS_NC:
7956 case R_ARM_MOVT_ABS:
7957 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7958 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
7959 addend = (addend ^ 0x8000) - 0x8000;
7960 break;
7961
7962 case R_ARM_THM_MOVW_ABS_NC:
7963 case R_ARM_THM_MOVT_ABS:
7964 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
7965 << 16;
7966 value |= bfd_get_16 (input_bfd,
7967 contents + rel->r_offset + 2);
7968 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
7969 | ((value & 0x04000000) >> 15);
7970 addend = (addend ^ 0x8000) - 0x8000;
7971 break;
7972
7973 default:
7974 if (howto->rightshift
7975 || (howto->src_mask & (howto->src_mask + 1)))
7976 {
7977 (*_bfd_error_handler)
7978 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
7979 input_bfd, input_section,
7980 (long) rel->r_offset, howto->name);
7981 return FALSE;
7982 }
7983
7984 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7985
7986 /* Get the (signed) value from the instruction. */
7987 addend = value & howto->src_mask;
7988 if (addend & ((howto->src_mask + 1) >> 1))
7989 {
7990 bfd_signed_vma mask;
7991
7992 mask = -1;
7993 mask &= ~ howto->src_mask;
7994 addend |= mask;
7995 }
7996 break;
7997 }
7998
7999 msec = sec;
8000 addend =
8001 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
8002 - relocation;
8003 addend += msec->output_section->vma + msec->output_offset;
8004
8005 /* Cases here must match those in the preceeding
8006 switch statement. */
8007 switch (r_type)
8008 {
8009 case R_ARM_MOVW_ABS_NC:
8010 case R_ARM_MOVT_ABS:
8011 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
8012 | (addend & 0xfff);
8013 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
8014 break;
8015
8016 case R_ARM_THM_MOVW_ABS_NC:
8017 case R_ARM_THM_MOVT_ABS:
8018 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
8019 | (addend & 0xff) | ((addend & 0x0800) << 15);
8020 bfd_put_16 (input_bfd, value >> 16,
8021 contents + rel->r_offset);
8022 bfd_put_16 (input_bfd, value,
8023 contents + rel->r_offset + 2);
8024 break;
8025
8026 default:
8027 value = (value & ~ howto->dst_mask)
8028 | (addend & howto->dst_mask);
8029 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
8030 break;
8031 }
8032 }
8033 }
8034 else
8035 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8036 }
8037 else
8038 {
8039 bfd_boolean warned;
8040
8041 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8042 r_symndx, symtab_hdr, sym_hashes,
8043 h, sec, relocation,
8044 unresolved_reloc, warned);
8045
8046 sym_type = h->type;
8047 }
8048
8049 if (sec != NULL && elf_discarded_section (sec))
8050 {
8051 /* For relocs against symbols from removed linkonce sections,
8052 or sections discarded by a linker script, we just want the
8053 section contents zeroed. Avoid any special processing. */
8054 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
8055 rel->r_info = 0;
8056 rel->r_addend = 0;
8057 continue;
8058 }
8059
8060 if (info->relocatable)
8061 {
8062 /* This is a relocatable link. We don't have to change
8063 anything, unless the reloc is against a section symbol,
8064 in which case we have to adjust according to where the
8065 section symbol winds up in the output section. */
8066 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
8067 {
8068 if (globals->use_rel)
8069 arm_add_to_rel (input_bfd, contents + rel->r_offset,
8070 howto, (bfd_signed_vma) sec->output_offset);
8071 else
8072 rel->r_addend += sec->output_offset;
8073 }
8074 continue;
8075 }
8076
8077 if (h != NULL)
8078 name = h->root.root.string;
8079 else
8080 {
8081 name = (bfd_elf_string_from_elf_section
8082 (input_bfd, symtab_hdr->sh_link, sym->st_name));
8083 if (name == NULL || *name == '\0')
8084 name = bfd_section_name (input_bfd, sec);
8085 }
8086
8087 if (r_symndx != 0
8088 && r_type != R_ARM_NONE
8089 && (h == NULL
8090 || h->root.type == bfd_link_hash_defined
8091 || h->root.type == bfd_link_hash_defweak)
8092 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
8093 {
8094 (*_bfd_error_handler)
8095 ((sym_type == STT_TLS
8096 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
8097 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
8098 input_bfd,
8099 input_section,
8100 (long) rel->r_offset,
8101 howto->name,
8102 name);
8103 }
8104
8105 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
8106 input_section, contents, rel,
8107 relocation, info, sec, name,
8108 (h ? ELF_ST_TYPE (h->type) :
8109 ELF_ST_TYPE (sym->st_info)), h,
8110 &unresolved_reloc, &error_message);
8111
8112 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8113 because such sections are not SEC_ALLOC and thus ld.so will
8114 not process them. */
8115 if (unresolved_reloc
8116 && !((input_section->flags & SEC_DEBUGGING) != 0
8117 && h->def_dynamic))
8118 {
8119 (*_bfd_error_handler)
8120 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
8121 input_bfd,
8122 input_section,
8123 (long) rel->r_offset,
8124 howto->name,
8125 h->root.root.string);
8126 return FALSE;
8127 }
8128
8129 if (r != bfd_reloc_ok)
8130 {
8131 switch (r)
8132 {
8133 case bfd_reloc_overflow:
8134 /* If the overflowing reloc was to an undefined symbol,
8135 we have already printed one error message and there
8136 is no point complaining again. */
8137 if ((! h ||
8138 h->root.type != bfd_link_hash_undefined)
8139 && (!((*info->callbacks->reloc_overflow)
8140 (info, (h ? &h->root : NULL), name, howto->name,
8141 (bfd_vma) 0, input_bfd, input_section,
8142 rel->r_offset))))
8143 return FALSE;
8144 break;
8145
8146 case bfd_reloc_undefined:
8147 if (!((*info->callbacks->undefined_symbol)
8148 (info, name, input_bfd, input_section,
8149 rel->r_offset, TRUE)))
8150 return FALSE;
8151 break;
8152
8153 case bfd_reloc_outofrange:
8154 error_message = _("out of range");
8155 goto common_error;
8156
8157 case bfd_reloc_notsupported:
8158 error_message = _("unsupported relocation");
8159 goto common_error;
8160
8161 case bfd_reloc_dangerous:
8162 /* error_message should already be set. */
8163 goto common_error;
8164
8165 default:
8166 error_message = _("unknown error");
8167 /* Fall through. */
8168
8169 common_error:
8170 BFD_ASSERT (error_message != NULL);
8171 if (!((*info->callbacks->reloc_dangerous)
8172 (info, error_message, input_bfd, input_section,
8173 rel->r_offset)))
8174 return FALSE;
8175 break;
8176 }
8177 }
8178 }
8179
8180 return TRUE;
8181 }
8182
8183 static bfd_boolean
8184 elf32_arm_output_glue_section (struct bfd_link_info *info, bfd *obfd,
8185 bfd *ibfd, const char *name)
8186 {
8187 asection *sec, *osec;
8188
8189 sec = bfd_get_section_by_name (ibfd, name);
8190 if (sec == NULL || (sec->flags & SEC_EXCLUDE) != 0)
8191 return TRUE;
8192
8193 osec = sec->output_section;
8194 if (elf32_arm_write_section (obfd, info, sec, sec->contents))
8195 return TRUE;
8196
8197 if (! bfd_set_section_contents (obfd, osec, sec->contents,
8198 sec->output_offset, sec->size))
8199 return FALSE;
8200
8201 return TRUE;
8202 }
8203
8204 static bfd_boolean
8205 elf32_arm_final_link (bfd *abfd, struct bfd_link_info *info)
8206 {
8207 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info);
8208
8209 /* Invoke the regular ELF backend linker to do all the work. */
8210 if (!bfd_elf_final_link (abfd, info))
8211 return FALSE;
8212
8213 /* Write out any glue sections now that we have created all the
8214 stubs. */
8215 if (globals->bfd_of_glue_owner != NULL)
8216 {
8217 if (! elf32_arm_output_glue_section (info, abfd,
8218 globals->bfd_of_glue_owner,
8219 ARM2THUMB_GLUE_SECTION_NAME))
8220 return FALSE;
8221
8222 if (! elf32_arm_output_glue_section (info, abfd,
8223 globals->bfd_of_glue_owner,
8224 THUMB2ARM_GLUE_SECTION_NAME))
8225 return FALSE;
8226
8227 if (! elf32_arm_output_glue_section (info, abfd,
8228 globals->bfd_of_glue_owner,
8229 VFP11_ERRATUM_VENEER_SECTION_NAME))
8230 return FALSE;
8231
8232 if (! elf32_arm_output_glue_section (info, abfd,
8233 globals->bfd_of_glue_owner,
8234 ARM_BX_GLUE_SECTION_NAME))
8235 return FALSE;
8236 }
8237
8238 return TRUE;
8239 }
8240
8241 /* Set the right machine number. */
8242
8243 static bfd_boolean
8244 elf32_arm_object_p (bfd *abfd)
8245 {
8246 unsigned int mach;
8247
8248 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
8249
8250 if (mach != bfd_mach_arm_unknown)
8251 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8252
8253 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
8254 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
8255
8256 else
8257 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8258
8259 return TRUE;
8260 }
8261
8262 /* Function to keep ARM specific flags in the ELF header. */
8263
8264 static bfd_boolean
8265 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
8266 {
8267 if (elf_flags_init (abfd)
8268 && elf_elfheader (abfd)->e_flags != flags)
8269 {
8270 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
8271 {
8272 if (flags & EF_ARM_INTERWORK)
8273 (*_bfd_error_handler)
8274 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
8275 abfd);
8276 else
8277 _bfd_error_handler
8278 (_("Warning: Clearing the interworking flag of %B due to outside request"),
8279 abfd);
8280 }
8281 }
8282 else
8283 {
8284 elf_elfheader (abfd)->e_flags = flags;
8285 elf_flags_init (abfd) = TRUE;
8286 }
8287
8288 return TRUE;
8289 }
8290
8291 /* Copy backend specific data from one object module to another. */
8292
8293 static bfd_boolean
8294 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
8295 {
8296 flagword in_flags;
8297 flagword out_flags;
8298
8299 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
8300 return TRUE;
8301
8302 in_flags = elf_elfheader (ibfd)->e_flags;
8303 out_flags = elf_elfheader (obfd)->e_flags;
8304
8305 if (elf_flags_init (obfd)
8306 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
8307 && in_flags != out_flags)
8308 {
8309 /* Cannot mix APCS26 and APCS32 code. */
8310 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
8311 return FALSE;
8312
8313 /* Cannot mix float APCS and non-float APCS code. */
8314 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
8315 return FALSE;
8316
8317 /* If the src and dest have different interworking flags
8318 then turn off the interworking bit. */
8319 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8320 {
8321 if (out_flags & EF_ARM_INTERWORK)
8322 _bfd_error_handler
8323 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
8324 obfd, ibfd);
8325
8326 in_flags &= ~EF_ARM_INTERWORK;
8327 }
8328
8329 /* Likewise for PIC, though don't warn for this case. */
8330 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
8331 in_flags &= ~EF_ARM_PIC;
8332 }
8333
8334 elf_elfheader (obfd)->e_flags = in_flags;
8335 elf_flags_init (obfd) = TRUE;
8336
8337 /* Also copy the EI_OSABI field. */
8338 elf_elfheader (obfd)->e_ident[EI_OSABI] =
8339 elf_elfheader (ibfd)->e_ident[EI_OSABI];
8340
8341 /* Copy object attributes. */
8342 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8343
8344 return TRUE;
8345 }
8346
8347 /* Values for Tag_ABI_PCS_R9_use. */
8348 enum
8349 {
8350 AEABI_R9_V6,
8351 AEABI_R9_SB,
8352 AEABI_R9_TLS,
8353 AEABI_R9_unused
8354 };
8355
8356 /* Values for Tag_ABI_PCS_RW_data. */
8357 enum
8358 {
8359 AEABI_PCS_RW_data_absolute,
8360 AEABI_PCS_RW_data_PCrel,
8361 AEABI_PCS_RW_data_SBrel,
8362 AEABI_PCS_RW_data_unused
8363 };
8364
8365 /* Values for Tag_ABI_enum_size. */
8366 enum
8367 {
8368 AEABI_enum_unused,
8369 AEABI_enum_short,
8370 AEABI_enum_wide,
8371 AEABI_enum_forced_wide
8372 };
8373
8374 /* Determine whether an object attribute tag takes an integer, a
8375 string or both. */
8376
8377 static int
8378 elf32_arm_obj_attrs_arg_type (int tag)
8379 {
8380 if (tag == Tag_compatibility)
8381 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
8382 else if (tag == Tag_nodefaults)
8383 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_NO_DEFAULT;
8384 else if (tag == Tag_CPU_raw_name || tag == Tag_CPU_name)
8385 return ATTR_TYPE_FLAG_STR_VAL;
8386 else if (tag < 32)
8387 return ATTR_TYPE_FLAG_INT_VAL;
8388 else
8389 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
8390 }
8391
8392 /* The ABI defines that Tag_conformance should be emitted first, and that
8393 Tag_nodefaults should be second (if either is defined). This sets those
8394 two positions, and bumps up the position of all the remaining tags to
8395 compensate. */
8396 static int
8397 elf32_arm_obj_attrs_order (int num)
8398 {
8399 if (num == 4)
8400 return Tag_conformance;
8401 if (num == 5)
8402 return Tag_nodefaults;
8403 if ((num - 2) < Tag_nodefaults)
8404 return num - 2;
8405 if ((num - 1) < Tag_conformance)
8406 return num - 1;
8407 return num;
8408 }
8409
8410 /* Read the architecture from the Tag_also_compatible_with attribute, if any.
8411 Returns -1 if no architecture could be read. */
8412
8413 static int
8414 get_secondary_compatible_arch (bfd *abfd)
8415 {
8416 obj_attribute *attr =
8417 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
8418
8419 /* Note: the tag and its argument below are uleb128 values, though
8420 currently-defined values fit in one byte for each. */
8421 if (attr->s
8422 && attr->s[0] == Tag_CPU_arch
8423 && (attr->s[1] & 128) != 128
8424 && attr->s[2] == 0)
8425 return attr->s[1];
8426
8427 /* This tag is "safely ignorable", so don't complain if it looks funny. */
8428 return -1;
8429 }
8430
8431 /* Set, or unset, the architecture of the Tag_also_compatible_with attribute.
8432 The tag is removed if ARCH is -1. */
8433
8434 static void
8435 set_secondary_compatible_arch (bfd *abfd, int arch)
8436 {
8437 obj_attribute *attr =
8438 &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with];
8439
8440 if (arch == -1)
8441 {
8442 attr->s = NULL;
8443 return;
8444 }
8445
8446 /* Note: the tag and its argument below are uleb128 values, though
8447 currently-defined values fit in one byte for each. */
8448 if (!attr->s)
8449 attr->s = bfd_alloc (abfd, 3);
8450 attr->s[0] = Tag_CPU_arch;
8451 attr->s[1] = arch;
8452 attr->s[2] = '\0';
8453 }
8454
8455 /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags
8456 into account. */
8457
8458 static int
8459 tag_cpu_arch_combine (bfd *ibfd, int oldtag, int *secondary_compat_out,
8460 int newtag, int secondary_compat)
8461 {
8462 #define T(X) TAG_CPU_ARCH_##X
8463 int tagl, tagh, result;
8464 const int v6t2[] =
8465 {
8466 T(V6T2), /* PRE_V4. */
8467 T(V6T2), /* V4. */
8468 T(V6T2), /* V4T. */
8469 T(V6T2), /* V5T. */
8470 T(V6T2), /* V5TE. */
8471 T(V6T2), /* V5TEJ. */
8472 T(V6T2), /* V6. */
8473 T(V7), /* V6KZ. */
8474 T(V6T2) /* V6T2. */
8475 };
8476 const int v6k[] =
8477 {
8478 T(V6K), /* PRE_V4. */
8479 T(V6K), /* V4. */
8480 T(V6K), /* V4T. */
8481 T(V6K), /* V5T. */
8482 T(V6K), /* V5TE. */
8483 T(V6K), /* V5TEJ. */
8484 T(V6K), /* V6. */
8485 T(V6KZ), /* V6KZ. */
8486 T(V7), /* V6T2. */
8487 T(V6K) /* V6K. */
8488 };
8489 const int v7[] =
8490 {
8491 T(V7), /* PRE_V4. */
8492 T(V7), /* V4. */
8493 T(V7), /* V4T. */
8494 T(V7), /* V5T. */
8495 T(V7), /* V5TE. */
8496 T(V7), /* V5TEJ. */
8497 T(V7), /* V6. */
8498 T(V7), /* V6KZ. */
8499 T(V7), /* V6T2. */
8500 T(V7), /* V6K. */
8501 T(V7) /* V7. */
8502 };
8503 const int v6_m[] =
8504 {
8505 -1, /* PRE_V4. */
8506 -1, /* V4. */
8507 T(V6K), /* V4T. */
8508 T(V6K), /* V5T. */
8509 T(V6K), /* V5TE. */
8510 T(V6K), /* V5TEJ. */
8511 T(V6K), /* V6. */
8512 T(V6KZ), /* V6KZ. */
8513 T(V7), /* V6T2. */
8514 T(V6K), /* V6K. */
8515 T(V7), /* V7. */
8516 T(V6_M) /* V6_M. */
8517 };
8518 const int v6s_m[] =
8519 {
8520 -1, /* PRE_V4. */
8521 -1, /* V4. */
8522 T(V6K), /* V4T. */
8523 T(V6K), /* V5T. */
8524 T(V6K), /* V5TE. */
8525 T(V6K), /* V5TEJ. */
8526 T(V6K), /* V6. */
8527 T(V6KZ), /* V6KZ. */
8528 T(V7), /* V6T2. */
8529 T(V6K), /* V6K. */
8530 T(V7), /* V7. */
8531 T(V6S_M), /* V6_M. */
8532 T(V6S_M) /* V6S_M. */
8533 };
8534 const int v4t_plus_v6_m[] =
8535 {
8536 -1, /* PRE_V4. */
8537 -1, /* V4. */
8538 T(V4T), /* V4T. */
8539 T(V5T), /* V5T. */
8540 T(V5TE), /* V5TE. */
8541 T(V5TEJ), /* V5TEJ. */
8542 T(V6), /* V6. */
8543 T(V6KZ), /* V6KZ. */
8544 T(V6T2), /* V6T2. */
8545 T(V6K), /* V6K. */
8546 T(V7), /* V7. */
8547 T(V6_M), /* V6_M. */
8548 T(V6S_M), /* V6S_M. */
8549 T(V4T_PLUS_V6_M) /* V4T plus V6_M. */
8550 };
8551 const int *comb[] =
8552 {
8553 v6t2,
8554 v6k,
8555 v7,
8556 v6_m,
8557 v6s_m,
8558 /* Pseudo-architecture. */
8559 v4t_plus_v6_m
8560 };
8561
8562 /* Check we've not got a higher architecture than we know about. */
8563
8564 if (oldtag >= MAX_TAG_CPU_ARCH || newtag >= MAX_TAG_CPU_ARCH)
8565 {
8566 _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd);
8567 return -1;
8568 }
8569
8570 /* Override old tag if we have a Tag_also_compatible_with on the output. */
8571
8572 if ((oldtag == T(V6_M) && *secondary_compat_out == T(V4T))
8573 || (oldtag == T(V4T) && *secondary_compat_out == T(V6_M)))
8574 oldtag = T(V4T_PLUS_V6_M);
8575
8576 /* And override the new tag if we have a Tag_also_compatible_with on the
8577 input. */
8578
8579 if ((newtag == T(V6_M) && secondary_compat == T(V4T))
8580 || (newtag == T(V4T) && secondary_compat == T(V6_M)))
8581 newtag = T(V4T_PLUS_V6_M);
8582
8583 tagl = (oldtag < newtag) ? oldtag : newtag;
8584 result = tagh = (oldtag > newtag) ? oldtag : newtag;
8585
8586 /* Architectures before V6KZ add features monotonically. */
8587 if (tagh <= TAG_CPU_ARCH_V6KZ)
8588 return result;
8589
8590 result = comb[tagh - T(V6T2)][tagl];
8591
8592 /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M)
8593 as the canonical version. */
8594 if (result == T(V4T_PLUS_V6_M))
8595 {
8596 result = T(V4T);
8597 *secondary_compat_out = T(V6_M);
8598 }
8599 else
8600 *secondary_compat_out = -1;
8601
8602 if (result == -1)
8603 {
8604 _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"),
8605 ibfd, oldtag, newtag);
8606 return -1;
8607 }
8608
8609 return result;
8610 #undef T
8611 }
8612
8613 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
8614 are conflicting attributes. */
8615
8616 static bfd_boolean
8617 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
8618 {
8619 obj_attribute *in_attr;
8620 obj_attribute *out_attr;
8621 obj_attribute_list *in_list;
8622 obj_attribute_list *out_list;
8623 obj_attribute_list **out_listp;
8624 /* Some tags have 0 = don't care, 1 = strong requirement,
8625 2 = weak requirement. */
8626 static const int order_021[3] = {0, 2, 1};
8627 /* For use with Tag_VFP_arch. */
8628 static const int order_01243[5] = {0, 1, 2, 4, 3};
8629 int i;
8630 bfd_boolean result = TRUE;
8631
8632 /* Skip the linker stubs file. This preserves previous behavior
8633 of accepting unknown attributes in the first input file - but
8634 is that a bug? */
8635 if (ibfd->flags & BFD_LINKER_CREATED)
8636 return TRUE;
8637
8638 if (!elf_known_obj_attributes_proc (obfd)[0].i)
8639 {
8640 /* This is the first object. Copy the attributes. */
8641 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8642
8643 /* Use the Tag_null value to indicate the attributes have been
8644 initialized. */
8645 elf_known_obj_attributes_proc (obfd)[0].i = 1;
8646
8647 return TRUE;
8648 }
8649
8650 in_attr = elf_known_obj_attributes_proc (ibfd);
8651 out_attr = elf_known_obj_attributes_proc (obfd);
8652 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
8653 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
8654 {
8655 /* Ignore mismatches if the object doesn't use floating point. */
8656 if (out_attr[Tag_ABI_FP_number_model].i == 0)
8657 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
8658 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
8659 {
8660 _bfd_error_handler
8661 (_("error: %B uses VFP register arguments, %B does not"),
8662 ibfd, obfd);
8663 result = FALSE;
8664 }
8665 }
8666
8667 for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
8668 {
8669 /* Merge this attribute with existing attributes. */
8670 switch (i)
8671 {
8672 case Tag_CPU_raw_name:
8673 case Tag_CPU_name:
8674 /* These are merged after Tag_CPU_arch. */
8675 break;
8676
8677 case Tag_ABI_optimization_goals:
8678 case Tag_ABI_FP_optimization_goals:
8679 /* Use the first value seen. */
8680 break;
8681
8682 case Tag_CPU_arch:
8683 {
8684 int secondary_compat = -1, secondary_compat_out = -1;
8685 unsigned int saved_out_attr = out_attr[i].i;
8686 static const char *name_table[] = {
8687 /* These aren't real CPU names, but we can't guess
8688 that from the architecture version alone. */
8689 "Pre v4",
8690 "ARM v4",
8691 "ARM v4T",
8692 "ARM v5T",
8693 "ARM v5TE",
8694 "ARM v5TEJ",
8695 "ARM v6",
8696 "ARM v6KZ",
8697 "ARM v6T2",
8698 "ARM v6K",
8699 "ARM v7",
8700 "ARM v6-M",
8701 "ARM v6S-M"
8702 };
8703
8704 /* Merge Tag_CPU_arch and Tag_also_compatible_with. */
8705 secondary_compat = get_secondary_compatible_arch (ibfd);
8706 secondary_compat_out = get_secondary_compatible_arch (obfd);
8707 out_attr[i].i = tag_cpu_arch_combine (ibfd, out_attr[i].i,
8708 &secondary_compat_out,
8709 in_attr[i].i,
8710 secondary_compat);
8711 set_secondary_compatible_arch (obfd, secondary_compat_out);
8712
8713 /* Merge Tag_CPU_name and Tag_CPU_raw_name. */
8714 if (out_attr[i].i == saved_out_attr)
8715 ; /* Leave the names alone. */
8716 else if (out_attr[i].i == in_attr[i].i)
8717 {
8718 /* The output architecture has been changed to match the
8719 input architecture. Use the input names. */
8720 out_attr[Tag_CPU_name].s = in_attr[Tag_CPU_name].s
8721 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_name].s)
8722 : NULL;
8723 out_attr[Tag_CPU_raw_name].s = in_attr[Tag_CPU_raw_name].s
8724 ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_raw_name].s)
8725 : NULL;
8726 }
8727 else
8728 {
8729 out_attr[Tag_CPU_name].s = NULL;
8730 out_attr[Tag_CPU_raw_name].s = NULL;
8731 }
8732
8733 /* If we still don't have a value for Tag_CPU_name,
8734 make one up now. Tag_CPU_raw_name remains blank. */
8735 if (out_attr[Tag_CPU_name].s == NULL
8736 && out_attr[i].i < ARRAY_SIZE (name_table))
8737 out_attr[Tag_CPU_name].s =
8738 _bfd_elf_attr_strdup (obfd, name_table[out_attr[i].i]);
8739 }
8740 break;
8741
8742 case Tag_ARM_ISA_use:
8743 case Tag_THUMB_ISA_use:
8744 case Tag_WMMX_arch:
8745 case Tag_Advanced_SIMD_arch:
8746 /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */
8747 case Tag_ABI_FP_rounding:
8748 case Tag_ABI_FP_exceptions:
8749 case Tag_ABI_FP_user_exceptions:
8750 case Tag_ABI_FP_number_model:
8751 case Tag_VFP_HP_extension:
8752 case Tag_CPU_unaligned_access:
8753 case Tag_T2EE_use:
8754 case Tag_Virtualization_use:
8755 case Tag_MPextension_use:
8756 /* Use the largest value specified. */
8757 if (in_attr[i].i > out_attr[i].i)
8758 out_attr[i].i = in_attr[i].i;
8759 break;
8760
8761 case Tag_ABI_align8_preserved:
8762 case Tag_ABI_PCS_RO_data:
8763 /* Use the smallest value specified. */
8764 if (in_attr[i].i < out_attr[i].i)
8765 out_attr[i].i = in_attr[i].i;
8766 break;
8767
8768 case Tag_ABI_align8_needed:
8769 if ((in_attr[i].i > 0 || out_attr[i].i > 0)
8770 && (in_attr[Tag_ABI_align8_preserved].i == 0
8771 || out_attr[Tag_ABI_align8_preserved].i == 0))
8772 {
8773 /* This error message should be enabled once all non-conformant
8774 binaries in the toolchain have had the attributes set
8775 properly.
8776 _bfd_error_handler
8777 (_("error: %B: 8-byte data alignment conflicts with %B"),
8778 obfd, ibfd);
8779 result = FALSE; */
8780 }
8781 /* Fall through. */
8782 case Tag_ABI_FP_denormal:
8783 case Tag_ABI_PCS_GOT_use:
8784 /* Use the "greatest" from the sequence 0, 2, 1, or the largest
8785 value if greater than 2 (for future-proofing). */
8786 if ((in_attr[i].i > 2 && in_attr[i].i > out_attr[i].i)
8787 || (in_attr[i].i <= 2 && out_attr[i].i <= 2
8788 && order_021[in_attr[i].i] > order_021[out_attr[i].i]))
8789 out_attr[i].i = in_attr[i].i;
8790 break;
8791
8792
8793 case Tag_CPU_arch_profile:
8794 if (out_attr[i].i != in_attr[i].i)
8795 {
8796 /* 0 will merge with anything.
8797 'A' and 'S' merge to 'A'.
8798 'R' and 'S' merge to 'R'.
8799 'M' and 'A|R|S' is an error. */
8800 if (out_attr[i].i == 0
8801 || (out_attr[i].i == 'S'
8802 && (in_attr[i].i == 'A' || in_attr[i].i == 'R')))
8803 out_attr[i].i = in_attr[i].i;
8804 else if (in_attr[i].i == 0
8805 || (in_attr[i].i == 'S'
8806 && (out_attr[i].i == 'A' || out_attr[i].i == 'R')))
8807 ; /* Do nothing. */
8808 else
8809 {
8810 _bfd_error_handler
8811 (_("error: %B: Conflicting architecture profiles %c/%c"),
8812 ibfd,
8813 in_attr[i].i ? in_attr[i].i : '0',
8814 out_attr[i].i ? out_attr[i].i : '0');
8815 result = FALSE;
8816 }
8817 }
8818 break;
8819 case Tag_VFP_arch:
8820 /* Use the "greatest" from the sequence 0, 1, 2, 4, 3, or the
8821 largest value if greater than 4 (for future-proofing). */
8822 if ((in_attr[i].i > 4 && in_attr[i].i > out_attr[i].i)
8823 || (in_attr[i].i <= 4 && out_attr[i].i <= 4
8824 && order_01243[in_attr[i].i] > order_01243[out_attr[i].i]))
8825 out_attr[i].i = in_attr[i].i;
8826 break;
8827 case Tag_PCS_config:
8828 if (out_attr[i].i == 0)
8829 out_attr[i].i = in_attr[i].i;
8830 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
8831 {
8832 /* It's sometimes ok to mix different configs, so this is only
8833 a warning. */
8834 _bfd_error_handler
8835 (_("Warning: %B: Conflicting platform configuration"), ibfd);
8836 }
8837 break;
8838 case Tag_ABI_PCS_R9_use:
8839 if (in_attr[i].i != out_attr[i].i
8840 && out_attr[i].i != AEABI_R9_unused
8841 && in_attr[i].i != AEABI_R9_unused)
8842 {
8843 _bfd_error_handler
8844 (_("error: %B: Conflicting use of R9"), ibfd);
8845 result = FALSE;
8846 }
8847 if (out_attr[i].i == AEABI_R9_unused)
8848 out_attr[i].i = in_attr[i].i;
8849 break;
8850 case Tag_ABI_PCS_RW_data:
8851 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
8852 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
8853 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
8854 {
8855 _bfd_error_handler
8856 (_("error: %B: SB relative addressing conflicts with use of R9"),
8857 ibfd);
8858 result = FALSE;
8859 }
8860 /* Use the smallest value specified. */
8861 if (in_attr[i].i < out_attr[i].i)
8862 out_attr[i].i = in_attr[i].i;
8863 break;
8864 case Tag_ABI_PCS_wchar_t:
8865 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
8866 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
8867 {
8868 _bfd_error_handler
8869 (_("warning: %B uses %u-byte wchar_t yet the output is to use %u-byte wchar_t; use of wchar_t values across objects may fail"),
8870 ibfd, in_attr[i].i, out_attr[i].i);
8871 }
8872 else if (in_attr[i].i && !out_attr[i].i)
8873 out_attr[i].i = in_attr[i].i;
8874 break;
8875 case Tag_ABI_enum_size:
8876 if (in_attr[i].i != AEABI_enum_unused)
8877 {
8878 if (out_attr[i].i == AEABI_enum_unused
8879 || out_attr[i].i == AEABI_enum_forced_wide)
8880 {
8881 /* The existing object is compatible with anything.
8882 Use whatever requirements the new object has. */
8883 out_attr[i].i = in_attr[i].i;
8884 }
8885 else if (in_attr[i].i != AEABI_enum_forced_wide
8886 && out_attr[i].i != in_attr[i].i
8887 && !elf_arm_tdata (obfd)->no_enum_size_warning)
8888 {
8889 static const char *aeabi_enum_names[] =
8890 { "", "variable-size", "32-bit", "" };
8891 const char *in_name =
8892 in_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
8893 ? aeabi_enum_names[in_attr[i].i]
8894 : "<unknown>";
8895 const char *out_name =
8896 out_attr[i].i < ARRAY_SIZE(aeabi_enum_names)
8897 ? aeabi_enum_names[out_attr[i].i]
8898 : "<unknown>";
8899 _bfd_error_handler
8900 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
8901 ibfd, in_name, out_name);
8902 }
8903 }
8904 break;
8905 case Tag_ABI_VFP_args:
8906 /* Aready done. */
8907 break;
8908 case Tag_ABI_WMMX_args:
8909 if (in_attr[i].i != out_attr[i].i)
8910 {
8911 _bfd_error_handler
8912 (_("error: %B uses iWMMXt register arguments, %B does not"),
8913 ibfd, obfd);
8914 result = FALSE;
8915 }
8916 break;
8917 case Tag_compatibility:
8918 /* Merged in target-independent code. */
8919 break;
8920 case Tag_ABI_HardFP_use:
8921 /* 1 (SP) and 2 (DP) conflict, so combine to 3 (SP & DP). */
8922 if ((in_attr[i].i == 1 && out_attr[i].i == 2)
8923 || (in_attr[i].i == 2 && out_attr[i].i == 1))
8924 out_attr[i].i = 3;
8925 else if (in_attr[i].i > out_attr[i].i)
8926 out_attr[i].i = in_attr[i].i;
8927 break;
8928 case Tag_ABI_FP_16bit_format:
8929 if (in_attr[i].i != 0 && out_attr[i].i != 0)
8930 {
8931 if (in_attr[i].i != out_attr[i].i)
8932 {
8933 _bfd_error_handler
8934 (_("error: fp16 format mismatch between %B and %B"),
8935 ibfd, obfd);
8936 result = FALSE;
8937 }
8938 }
8939 if (in_attr[i].i != 0)
8940 out_attr[i].i = in_attr[i].i;
8941 break;
8942
8943 case Tag_nodefaults:
8944 /* This tag is set if it exists, but the value is unused (and is
8945 typically zero). We don't actually need to do anything here -
8946 the merge happens automatically when the type flags are merged
8947 below. */
8948 break;
8949 case Tag_also_compatible_with:
8950 /* Already done in Tag_CPU_arch. */
8951 break;
8952 case Tag_conformance:
8953 /* Keep the attribute if it matches. Throw it away otherwise.
8954 No attribute means no claim to conform. */
8955 if (!in_attr[i].s || !out_attr[i].s
8956 || strcmp (in_attr[i].s, out_attr[i].s) != 0)
8957 out_attr[i].s = NULL;
8958 break;
8959
8960 default:
8961 {
8962 bfd *err_bfd = NULL;
8963
8964 /* The "known_obj_attributes" table does contain some undefined
8965 attributes. Ensure that there are unused. */
8966 if (out_attr[i].i != 0 || out_attr[i].s != NULL)
8967 err_bfd = obfd;
8968 else if (in_attr[i].i != 0 || in_attr[i].s != NULL)
8969 err_bfd = ibfd;
8970
8971 if (err_bfd != NULL)
8972 {
8973 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
8974 if ((i & 127) < 64)
8975 {
8976 _bfd_error_handler
8977 (_("%B: Unknown mandatory EABI object attribute %d"),
8978 err_bfd, i);
8979 bfd_set_error (bfd_error_bad_value);
8980 result = FALSE;
8981 }
8982 else
8983 {
8984 _bfd_error_handler
8985 (_("Warning: %B: Unknown EABI object attribute %d"),
8986 err_bfd, i);
8987 }
8988 }
8989
8990 /* Only pass on attributes that match in both inputs. */
8991 if (in_attr[i].i != out_attr[i].i
8992 || in_attr[i].s != out_attr[i].s
8993 || (in_attr[i].s != NULL && out_attr[i].s != NULL
8994 && strcmp (in_attr[i].s, out_attr[i].s) != 0))
8995 {
8996 out_attr[i].i = 0;
8997 out_attr[i].s = NULL;
8998 }
8999 }
9000 }
9001
9002 /* If out_attr was copied from in_attr then it won't have a type yet. */
9003 if (in_attr[i].type && !out_attr[i].type)
9004 out_attr[i].type = in_attr[i].type;
9005 }
9006
9007 /* Merge Tag_compatibility attributes and any common GNU ones. */
9008 _bfd_elf_merge_object_attributes (ibfd, obfd);
9009
9010 /* Check for any attributes not known on ARM. */
9011 in_list = elf_other_obj_attributes_proc (ibfd);
9012 out_listp = &elf_other_obj_attributes_proc (obfd);
9013 out_list = *out_listp;
9014
9015 for (; in_list || out_list; )
9016 {
9017 bfd *err_bfd = NULL;
9018 int err_tag = 0;
9019
9020 /* The tags for each list are in numerical order. */
9021 /* If the tags are equal, then merge. */
9022 if (out_list && (!in_list || in_list->tag > out_list->tag))
9023 {
9024 /* This attribute only exists in obfd. We can't merge, and we don't
9025 know what the tag means, so delete it. */
9026 err_bfd = obfd;
9027 err_tag = out_list->tag;
9028 *out_listp = out_list->next;
9029 out_list = *out_listp;
9030 }
9031 else if (in_list && (!out_list || in_list->tag < out_list->tag))
9032 {
9033 /* This attribute only exists in ibfd. We can't merge, and we don't
9034 know what the tag means, so ignore it. */
9035 err_bfd = ibfd;
9036 err_tag = in_list->tag;
9037 in_list = in_list->next;
9038 }
9039 else /* The tags are equal. */
9040 {
9041 /* As present, all attributes in the list are unknown, and
9042 therefore can't be merged meaningfully. */
9043 err_bfd = obfd;
9044 err_tag = out_list->tag;
9045
9046 /* Only pass on attributes that match in both inputs. */
9047 if (in_list->attr.i != out_list->attr.i
9048 || in_list->attr.s != out_list->attr.s
9049 || (in_list->attr.s && out_list->attr.s
9050 && strcmp (in_list->attr.s, out_list->attr.s) != 0))
9051 {
9052 /* No match. Delete the attribute. */
9053 *out_listp = out_list->next;
9054 out_list = *out_listp;
9055 }
9056 else
9057 {
9058 /* Matched. Keep the attribute and move to the next. */
9059 out_list = out_list->next;
9060 in_list = in_list->next;
9061 }
9062 }
9063
9064 if (err_bfd)
9065 {
9066 /* Attribute numbers >=64 (mod 128) can be safely ignored. */
9067 if ((err_tag & 127) < 64)
9068 {
9069 _bfd_error_handler
9070 (_("%B: Unknown mandatory EABI object attribute %d"),
9071 err_bfd, err_tag);
9072 bfd_set_error (bfd_error_bad_value);
9073 result = FALSE;
9074 }
9075 else
9076 {
9077 _bfd_error_handler
9078 (_("Warning: %B: Unknown EABI object attribute %d"),
9079 err_bfd, err_tag);
9080 }
9081 }
9082 }
9083 return result;
9084 }
9085
9086
9087 /* Return TRUE if the two EABI versions are incompatible. */
9088
9089 static bfd_boolean
9090 elf32_arm_versions_compatible (unsigned iver, unsigned over)
9091 {
9092 /* v4 and v5 are the same spec before and after it was released,
9093 so allow mixing them. */
9094 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
9095 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
9096 return TRUE;
9097
9098 return (iver == over);
9099 }
9100
9101 /* Merge backend specific data from an object file to the output
9102 object file when linking. */
9103
9104 static bfd_boolean
9105 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
9106 {
9107 flagword out_flags;
9108 flagword in_flags;
9109 bfd_boolean flags_compatible = TRUE;
9110 asection *sec;
9111
9112 /* Check if we have the same endianess. */
9113 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
9114 return FALSE;
9115
9116 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
9117 return TRUE;
9118
9119 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
9120 return FALSE;
9121
9122 /* The input BFD must have had its flags initialised. */
9123 /* The following seems bogus to me -- The flags are initialized in
9124 the assembler but I don't think an elf_flags_init field is
9125 written into the object. */
9126 /* BFD_ASSERT (elf_flags_init (ibfd)); */
9127
9128 in_flags = elf_elfheader (ibfd)->e_flags;
9129 out_flags = elf_elfheader (obfd)->e_flags;
9130
9131 /* In theory there is no reason why we couldn't handle this. However
9132 in practice it isn't even close to working and there is no real
9133 reason to want it. */
9134 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
9135 && !(ibfd->flags & DYNAMIC)
9136 && (in_flags & EF_ARM_BE8))
9137 {
9138 _bfd_error_handler (_("error: %B is already in final BE8 format"),
9139 ibfd);
9140 return FALSE;
9141 }
9142
9143 if (!elf_flags_init (obfd))
9144 {
9145 /* If the input is the default architecture and had the default
9146 flags then do not bother setting the flags for the output
9147 architecture, instead allow future merges to do this. If no
9148 future merges ever set these flags then they will retain their
9149 uninitialised values, which surprise surprise, correspond
9150 to the default values. */
9151 if (bfd_get_arch_info (ibfd)->the_default
9152 && elf_elfheader (ibfd)->e_flags == 0)
9153 return TRUE;
9154
9155 elf_flags_init (obfd) = TRUE;
9156 elf_elfheader (obfd)->e_flags = in_flags;
9157
9158 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
9159 && bfd_get_arch_info (obfd)->the_default)
9160 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
9161
9162 return TRUE;
9163 }
9164
9165 /* Determine what should happen if the input ARM architecture
9166 does not match the output ARM architecture. */
9167 if (! bfd_arm_merge_machines (ibfd, obfd))
9168 return FALSE;
9169
9170 /* Identical flags must be compatible. */
9171 if (in_flags == out_flags)
9172 return TRUE;
9173
9174 /* Check to see if the input BFD actually contains any sections. If
9175 not, its flags may not have been initialised either, but it
9176 cannot actually cause any incompatiblity. Do not short-circuit
9177 dynamic objects; their section list may be emptied by
9178 elf_link_add_object_symbols.
9179
9180 Also check to see if there are no code sections in the input.
9181 In this case there is no need to check for code specific flags.
9182 XXX - do we need to worry about floating-point format compatability
9183 in data sections ? */
9184 if (!(ibfd->flags & DYNAMIC))
9185 {
9186 bfd_boolean null_input_bfd = TRUE;
9187 bfd_boolean only_data_sections = TRUE;
9188
9189 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9190 {
9191 /* Ignore synthetic glue sections. */
9192 if (strcmp (sec->name, ".glue_7")
9193 && strcmp (sec->name, ".glue_7t"))
9194 {
9195 if ((bfd_get_section_flags (ibfd, sec)
9196 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
9197 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
9198 only_data_sections = FALSE;
9199
9200 null_input_bfd = FALSE;
9201 break;
9202 }
9203 }
9204
9205 if (null_input_bfd || only_data_sections)
9206 return TRUE;
9207 }
9208
9209 /* Complain about various flag mismatches. */
9210 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
9211 EF_ARM_EABI_VERSION (out_flags)))
9212 {
9213 _bfd_error_handler
9214 (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"),
9215 ibfd, obfd,
9216 (in_flags & EF_ARM_EABIMASK) >> 24,
9217 (out_flags & EF_ARM_EABIMASK) >> 24);
9218 return FALSE;
9219 }
9220
9221 /* Not sure what needs to be checked for EABI versions >= 1. */
9222 /* VxWorks libraries do not use these flags. */
9223 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
9224 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
9225 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
9226 {
9227 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
9228 {
9229 _bfd_error_handler
9230 (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
9231 ibfd, obfd,
9232 in_flags & EF_ARM_APCS_26 ? 26 : 32,
9233 out_flags & EF_ARM_APCS_26 ? 26 : 32);
9234 flags_compatible = FALSE;
9235 }
9236
9237 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
9238 {
9239 if (in_flags & EF_ARM_APCS_FLOAT)
9240 _bfd_error_handler
9241 (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"),
9242 ibfd, obfd);
9243 else
9244 _bfd_error_handler
9245 (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"),
9246 ibfd, obfd);
9247
9248 flags_compatible = FALSE;
9249 }
9250
9251 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
9252 {
9253 if (in_flags & EF_ARM_VFP_FLOAT)
9254 _bfd_error_handler
9255 (_("error: %B uses VFP instructions, whereas %B does not"),
9256 ibfd, obfd);
9257 else
9258 _bfd_error_handler
9259 (_("error: %B uses FPA instructions, whereas %B does not"),
9260 ibfd, obfd);
9261
9262 flags_compatible = FALSE;
9263 }
9264
9265 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
9266 {
9267 if (in_flags & EF_ARM_MAVERICK_FLOAT)
9268 _bfd_error_handler
9269 (_("error: %B uses Maverick instructions, whereas %B does not"),
9270 ibfd, obfd);
9271 else
9272 _bfd_error_handler
9273 (_("error: %B does not use Maverick instructions, whereas %B does"),
9274 ibfd, obfd);
9275
9276 flags_compatible = FALSE;
9277 }
9278
9279 #ifdef EF_ARM_SOFT_FLOAT
9280 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
9281 {
9282 /* We can allow interworking between code that is VFP format
9283 layout, and uses either soft float or integer regs for
9284 passing floating point arguments and results. We already
9285 know that the APCS_FLOAT flags match; similarly for VFP
9286 flags. */
9287 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
9288 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
9289 {
9290 if (in_flags & EF_ARM_SOFT_FLOAT)
9291 _bfd_error_handler
9292 (_("error: %B uses software FP, whereas %B uses hardware FP"),
9293 ibfd, obfd);
9294 else
9295 _bfd_error_handler
9296 (_("error: %B uses hardware FP, whereas %B uses software FP"),
9297 ibfd, obfd);
9298
9299 flags_compatible = FALSE;
9300 }
9301 }
9302 #endif
9303
9304 /* Interworking mismatch is only a warning. */
9305 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
9306 {
9307 if (in_flags & EF_ARM_INTERWORK)
9308 {
9309 _bfd_error_handler
9310 (_("Warning: %B supports interworking, whereas %B does not"),
9311 ibfd, obfd);
9312 }
9313 else
9314 {
9315 _bfd_error_handler
9316 (_("Warning: %B does not support interworking, whereas %B does"),
9317 ibfd, obfd);
9318 }
9319 }
9320 }
9321
9322 return flags_compatible;
9323 }
9324
9325 /* Display the flags field. */
9326
9327 static bfd_boolean
9328 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
9329 {
9330 FILE * file = (FILE *) ptr;
9331 unsigned long flags;
9332
9333 BFD_ASSERT (abfd != NULL && ptr != NULL);
9334
9335 /* Print normal ELF private data. */
9336 _bfd_elf_print_private_bfd_data (abfd, ptr);
9337
9338 flags = elf_elfheader (abfd)->e_flags;
9339 /* Ignore init flag - it may not be set, despite the flags field
9340 containing valid data. */
9341
9342 /* xgettext:c-format */
9343 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
9344
9345 switch (EF_ARM_EABI_VERSION (flags))
9346 {
9347 case EF_ARM_EABI_UNKNOWN:
9348 /* The following flag bits are GNU extensions and not part of the
9349 official ARM ELF extended ABI. Hence they are only decoded if
9350 the EABI version is not set. */
9351 if (flags & EF_ARM_INTERWORK)
9352 fprintf (file, _(" [interworking enabled]"));
9353
9354 if (flags & EF_ARM_APCS_26)
9355 fprintf (file, " [APCS-26]");
9356 else
9357 fprintf (file, " [APCS-32]");
9358
9359 if (flags & EF_ARM_VFP_FLOAT)
9360 fprintf (file, _(" [VFP float format]"));
9361 else if (flags & EF_ARM_MAVERICK_FLOAT)
9362 fprintf (file, _(" [Maverick float format]"));
9363 else
9364 fprintf (file, _(" [FPA float format]"));
9365
9366 if (flags & EF_ARM_APCS_FLOAT)
9367 fprintf (file, _(" [floats passed in float registers]"));
9368
9369 if (flags & EF_ARM_PIC)
9370 fprintf (file, _(" [position independent]"));
9371
9372 if (flags & EF_ARM_NEW_ABI)
9373 fprintf (file, _(" [new ABI]"));
9374
9375 if (flags & EF_ARM_OLD_ABI)
9376 fprintf (file, _(" [old ABI]"));
9377
9378 if (flags & EF_ARM_SOFT_FLOAT)
9379 fprintf (file, _(" [software FP]"));
9380
9381 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
9382 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
9383 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
9384 | EF_ARM_MAVERICK_FLOAT);
9385 break;
9386
9387 case EF_ARM_EABI_VER1:
9388 fprintf (file, _(" [Version1 EABI]"));
9389
9390 if (flags & EF_ARM_SYMSARESORTED)
9391 fprintf (file, _(" [sorted symbol table]"));
9392 else
9393 fprintf (file, _(" [unsorted symbol table]"));
9394
9395 flags &= ~ EF_ARM_SYMSARESORTED;
9396 break;
9397
9398 case EF_ARM_EABI_VER2:
9399 fprintf (file, _(" [Version2 EABI]"));
9400
9401 if (flags & EF_ARM_SYMSARESORTED)
9402 fprintf (file, _(" [sorted symbol table]"));
9403 else
9404 fprintf (file, _(" [unsorted symbol table]"));
9405
9406 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
9407 fprintf (file, _(" [dynamic symbols use segment index]"));
9408
9409 if (flags & EF_ARM_MAPSYMSFIRST)
9410 fprintf (file, _(" [mapping symbols precede others]"));
9411
9412 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
9413 | EF_ARM_MAPSYMSFIRST);
9414 break;
9415
9416 case EF_ARM_EABI_VER3:
9417 fprintf (file, _(" [Version3 EABI]"));
9418 break;
9419
9420 case EF_ARM_EABI_VER4:
9421 fprintf (file, _(" [Version4 EABI]"));
9422 goto eabi;
9423
9424 case EF_ARM_EABI_VER5:
9425 fprintf (file, _(" [Version5 EABI]"));
9426 eabi:
9427 if (flags & EF_ARM_BE8)
9428 fprintf (file, _(" [BE8]"));
9429
9430 if (flags & EF_ARM_LE8)
9431 fprintf (file, _(" [LE8]"));
9432
9433 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
9434 break;
9435
9436 default:
9437 fprintf (file, _(" <EABI version unrecognised>"));
9438 break;
9439 }
9440
9441 flags &= ~ EF_ARM_EABIMASK;
9442
9443 if (flags & EF_ARM_RELEXEC)
9444 fprintf (file, _(" [relocatable executable]"));
9445
9446 if (flags & EF_ARM_HASENTRY)
9447 fprintf (file, _(" [has entry point]"));
9448
9449 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
9450
9451 if (flags)
9452 fprintf (file, _("<Unrecognised flag bits set>"));
9453
9454 fputc ('\n', file);
9455
9456 return TRUE;
9457 }
9458
9459 static int
9460 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
9461 {
9462 switch (ELF_ST_TYPE (elf_sym->st_info))
9463 {
9464 case STT_ARM_TFUNC:
9465 return ELF_ST_TYPE (elf_sym->st_info);
9466
9467 case STT_ARM_16BIT:
9468 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
9469 This allows us to distinguish between data used by Thumb instructions
9470 and non-data (which is probably code) inside Thumb regions of an
9471 executable. */
9472 if (type != STT_OBJECT && type != STT_TLS)
9473 return ELF_ST_TYPE (elf_sym->st_info);
9474 break;
9475
9476 default:
9477 break;
9478 }
9479
9480 return type;
9481 }
9482
9483 static asection *
9484 elf32_arm_gc_mark_hook (asection *sec,
9485 struct bfd_link_info *info,
9486 Elf_Internal_Rela *rel,
9487 struct elf_link_hash_entry *h,
9488 Elf_Internal_Sym *sym)
9489 {
9490 if (h != NULL)
9491 switch (ELF32_R_TYPE (rel->r_info))
9492 {
9493 case R_ARM_GNU_VTINHERIT:
9494 case R_ARM_GNU_VTENTRY:
9495 return NULL;
9496 }
9497
9498 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
9499 }
9500
9501 /* Update the got entry reference counts for the section being removed. */
9502
9503 static bfd_boolean
9504 elf32_arm_gc_sweep_hook (bfd * abfd,
9505 struct bfd_link_info * info,
9506 asection * sec,
9507 const Elf_Internal_Rela * relocs)
9508 {
9509 Elf_Internal_Shdr *symtab_hdr;
9510 struct elf_link_hash_entry **sym_hashes;
9511 bfd_signed_vma *local_got_refcounts;
9512 const Elf_Internal_Rela *rel, *relend;
9513 struct elf32_arm_link_hash_table * globals;
9514
9515 if (info->relocatable)
9516 return TRUE;
9517
9518 globals = elf32_arm_hash_table (info);
9519
9520 elf_section_data (sec)->local_dynrel = NULL;
9521
9522 symtab_hdr = & elf_symtab_hdr (abfd);
9523 sym_hashes = elf_sym_hashes (abfd);
9524 local_got_refcounts = elf_local_got_refcounts (abfd);
9525
9526 check_use_blx (globals);
9527
9528 relend = relocs + sec->reloc_count;
9529 for (rel = relocs; rel < relend; rel++)
9530 {
9531 unsigned long r_symndx;
9532 struct elf_link_hash_entry *h = NULL;
9533 int r_type;
9534
9535 r_symndx = ELF32_R_SYM (rel->r_info);
9536 if (r_symndx >= symtab_hdr->sh_info)
9537 {
9538 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9539 while (h->root.type == bfd_link_hash_indirect
9540 || h->root.type == bfd_link_hash_warning)
9541 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9542 }
9543
9544 r_type = ELF32_R_TYPE (rel->r_info);
9545 r_type = arm_real_reloc_type (globals, r_type);
9546 switch (r_type)
9547 {
9548 case R_ARM_GOT32:
9549 case R_ARM_GOT_PREL:
9550 case R_ARM_TLS_GD32:
9551 case R_ARM_TLS_IE32:
9552 if (h != NULL)
9553 {
9554 if (h->got.refcount > 0)
9555 h->got.refcount -= 1;
9556 }
9557 else if (local_got_refcounts != NULL)
9558 {
9559 if (local_got_refcounts[r_symndx] > 0)
9560 local_got_refcounts[r_symndx] -= 1;
9561 }
9562 break;
9563
9564 case R_ARM_TLS_LDM32:
9565 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
9566 break;
9567
9568 case R_ARM_ABS32:
9569 case R_ARM_ABS32_NOI:
9570 case R_ARM_REL32:
9571 case R_ARM_REL32_NOI:
9572 case R_ARM_PC24:
9573 case R_ARM_PLT32:
9574 case R_ARM_CALL:
9575 case R_ARM_JUMP24:
9576 case R_ARM_PREL31:
9577 case R_ARM_THM_CALL:
9578 case R_ARM_THM_JUMP24:
9579 case R_ARM_THM_JUMP19:
9580 case R_ARM_MOVW_ABS_NC:
9581 case R_ARM_MOVT_ABS:
9582 case R_ARM_MOVW_PREL_NC:
9583 case R_ARM_MOVT_PREL:
9584 case R_ARM_THM_MOVW_ABS_NC:
9585 case R_ARM_THM_MOVT_ABS:
9586 case R_ARM_THM_MOVW_PREL_NC:
9587 case R_ARM_THM_MOVT_PREL:
9588 /* Should the interworking branches be here also? */
9589
9590 if (h != NULL)
9591 {
9592 struct elf32_arm_link_hash_entry *eh;
9593 struct elf32_arm_relocs_copied **pp;
9594 struct elf32_arm_relocs_copied *p;
9595
9596 eh = (struct elf32_arm_link_hash_entry *) h;
9597
9598 if (h->plt.refcount > 0)
9599 {
9600 h->plt.refcount -= 1;
9601 if (r_type == R_ARM_THM_CALL)
9602 eh->plt_maybe_thumb_refcount--;
9603
9604 if (r_type == R_ARM_THM_JUMP24
9605 || r_type == R_ARM_THM_JUMP19)
9606 eh->plt_thumb_refcount--;
9607 }
9608
9609 if (r_type == R_ARM_ABS32
9610 || r_type == R_ARM_REL32
9611 || r_type == R_ARM_ABS32_NOI
9612 || r_type == R_ARM_REL32_NOI)
9613 {
9614 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
9615 pp = &p->next)
9616 if (p->section == sec)
9617 {
9618 p->count -= 1;
9619 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
9620 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
9621 p->pc_count -= 1;
9622 if (p->count == 0)
9623 *pp = p->next;
9624 break;
9625 }
9626 }
9627 }
9628 break;
9629
9630 default:
9631 break;
9632 }
9633 }
9634
9635 return TRUE;
9636 }
9637
9638 /* Look through the relocs for a section during the first phase. */
9639
9640 static bfd_boolean
9641 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
9642 asection *sec, const Elf_Internal_Rela *relocs)
9643 {
9644 Elf_Internal_Shdr *symtab_hdr;
9645 struct elf_link_hash_entry **sym_hashes;
9646 const Elf_Internal_Rela *rel;
9647 const Elf_Internal_Rela *rel_end;
9648 bfd *dynobj;
9649 asection *sreloc;
9650 bfd_vma *local_got_offsets;
9651 struct elf32_arm_link_hash_table *htab;
9652 bfd_boolean needs_plt;
9653 unsigned long nsyms;
9654
9655 if (info->relocatable)
9656 return TRUE;
9657
9658 BFD_ASSERT (is_arm_elf (abfd));
9659
9660 htab = elf32_arm_hash_table (info);
9661 sreloc = NULL;
9662
9663 /* Create dynamic sections for relocatable executables so that we can
9664 copy relocations. */
9665 if (htab->root.is_relocatable_executable
9666 && ! htab->root.dynamic_sections_created)
9667 {
9668 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
9669 return FALSE;
9670 }
9671
9672 dynobj = elf_hash_table (info)->dynobj;
9673 local_got_offsets = elf_local_got_offsets (abfd);
9674
9675 symtab_hdr = & elf_symtab_hdr (abfd);
9676 sym_hashes = elf_sym_hashes (abfd);
9677 nsyms = NUM_SHDR_ENTRIES (symtab_hdr);
9678
9679 rel_end = relocs + sec->reloc_count;
9680 for (rel = relocs; rel < rel_end; rel++)
9681 {
9682 struct elf_link_hash_entry *h;
9683 struct elf32_arm_link_hash_entry *eh;
9684 unsigned long r_symndx;
9685 int r_type;
9686
9687 r_symndx = ELF32_R_SYM (rel->r_info);
9688 r_type = ELF32_R_TYPE (rel->r_info);
9689 r_type = arm_real_reloc_type (htab, r_type);
9690
9691 if (r_symndx >= nsyms
9692 /* PR 9934: It is possible to have relocations that do not
9693 refer to symbols, thus it is also possible to have an
9694 object file containing relocations but no symbol table. */
9695 && (r_symndx > 0 || nsyms > 0))
9696 {
9697 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
9698 r_symndx);
9699 return FALSE;
9700 }
9701
9702 if (nsyms == 0 || r_symndx < symtab_hdr->sh_info)
9703 h = NULL;
9704 else
9705 {
9706 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9707 while (h->root.type == bfd_link_hash_indirect
9708 || h->root.type == bfd_link_hash_warning)
9709 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9710 }
9711
9712 eh = (struct elf32_arm_link_hash_entry *) h;
9713
9714 switch (r_type)
9715 {
9716 case R_ARM_GOT32:
9717 case R_ARM_GOT_PREL:
9718 case R_ARM_TLS_GD32:
9719 case R_ARM_TLS_IE32:
9720 /* This symbol requires a global offset table entry. */
9721 {
9722 int tls_type, old_tls_type;
9723
9724 switch (r_type)
9725 {
9726 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
9727 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
9728 default: tls_type = GOT_NORMAL; break;
9729 }
9730
9731 if (h != NULL)
9732 {
9733 h->got.refcount++;
9734 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
9735 }
9736 else
9737 {
9738 bfd_signed_vma *local_got_refcounts;
9739
9740 /* This is a global offset table entry for a local symbol. */
9741 local_got_refcounts = elf_local_got_refcounts (abfd);
9742 if (local_got_refcounts == NULL)
9743 {
9744 bfd_size_type size;
9745
9746 size = symtab_hdr->sh_info;
9747 size *= (sizeof (bfd_signed_vma) + sizeof (char));
9748 local_got_refcounts = bfd_zalloc (abfd, size);
9749 if (local_got_refcounts == NULL)
9750 return FALSE;
9751 elf_local_got_refcounts (abfd) = local_got_refcounts;
9752 elf32_arm_local_got_tls_type (abfd)
9753 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
9754 }
9755 local_got_refcounts[r_symndx] += 1;
9756 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
9757 }
9758
9759 /* We will already have issued an error message if there is a
9760 TLS / non-TLS mismatch, based on the symbol type. We don't
9761 support any linker relaxations. So just combine any TLS
9762 types needed. */
9763 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
9764 && tls_type != GOT_NORMAL)
9765 tls_type |= old_tls_type;
9766
9767 if (old_tls_type != tls_type)
9768 {
9769 if (h != NULL)
9770 elf32_arm_hash_entry (h)->tls_type = tls_type;
9771 else
9772 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
9773 }
9774 }
9775 /* Fall through. */
9776
9777 case R_ARM_TLS_LDM32:
9778 if (r_type == R_ARM_TLS_LDM32)
9779 htab->tls_ldm_got.refcount++;
9780 /* Fall through. */
9781
9782 case R_ARM_GOTOFF32:
9783 case R_ARM_GOTPC:
9784 if (htab->sgot == NULL)
9785 {
9786 if (htab->root.dynobj == NULL)
9787 htab->root.dynobj = abfd;
9788 if (!create_got_section (htab->root.dynobj, info))
9789 return FALSE;
9790 }
9791 break;
9792
9793 case R_ARM_ABS12:
9794 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
9795 ldr __GOTT_INDEX__ offsets. */
9796 if (!htab->vxworks_p)
9797 break;
9798 /* Fall through. */
9799
9800 case R_ARM_PC24:
9801 case R_ARM_PLT32:
9802 case R_ARM_CALL:
9803 case R_ARM_JUMP24:
9804 case R_ARM_PREL31:
9805 case R_ARM_THM_CALL:
9806 case R_ARM_THM_JUMP24:
9807 case R_ARM_THM_JUMP19:
9808 needs_plt = 1;
9809 goto normal_reloc;
9810
9811 case R_ARM_MOVW_ABS_NC:
9812 case R_ARM_MOVT_ABS:
9813 case R_ARM_THM_MOVW_ABS_NC:
9814 case R_ARM_THM_MOVT_ABS:
9815 if (info->shared)
9816 {
9817 (*_bfd_error_handler)
9818 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
9819 abfd, elf32_arm_howto_table_1[r_type].name,
9820 (h) ? h->root.root.string : "a local symbol");
9821 bfd_set_error (bfd_error_bad_value);
9822 return FALSE;
9823 }
9824
9825 /* Fall through. */
9826 case R_ARM_ABS32:
9827 case R_ARM_ABS32_NOI:
9828 case R_ARM_REL32:
9829 case R_ARM_REL32_NOI:
9830 case R_ARM_MOVW_PREL_NC:
9831 case R_ARM_MOVT_PREL:
9832 case R_ARM_THM_MOVW_PREL_NC:
9833 case R_ARM_THM_MOVT_PREL:
9834 needs_plt = 0;
9835 normal_reloc:
9836
9837 /* Should the interworking branches be listed here? */
9838 if (h != NULL)
9839 {
9840 /* If this reloc is in a read-only section, we might
9841 need a copy reloc. We can't check reliably at this
9842 stage whether the section is read-only, as input
9843 sections have not yet been mapped to output sections.
9844 Tentatively set the flag for now, and correct in
9845 adjust_dynamic_symbol. */
9846 if (!info->shared)
9847 h->non_got_ref = 1;
9848
9849 /* We may need a .plt entry if the function this reloc
9850 refers to is in a different object. We can't tell for
9851 sure yet, because something later might force the
9852 symbol local. */
9853 if (needs_plt)
9854 h->needs_plt = 1;
9855
9856 /* If we create a PLT entry, this relocation will reference
9857 it, even if it's an ABS32 relocation. */
9858 h->plt.refcount += 1;
9859
9860 /* It's too early to use htab->use_blx here, so we have to
9861 record possible blx references separately from
9862 relocs that definitely need a thumb stub. */
9863
9864 if (r_type == R_ARM_THM_CALL)
9865 eh->plt_maybe_thumb_refcount += 1;
9866
9867 if (r_type == R_ARM_THM_JUMP24
9868 || r_type == R_ARM_THM_JUMP19)
9869 eh->plt_thumb_refcount += 1;
9870 }
9871
9872 /* If we are creating a shared library or relocatable executable,
9873 and this is a reloc against a global symbol, or a non PC
9874 relative reloc against a local symbol, then we need to copy
9875 the reloc into the shared library. However, if we are linking
9876 with -Bsymbolic, we do not need to copy a reloc against a
9877 global symbol which is defined in an object we are
9878 including in the link (i.e., DEF_REGULAR is set). At
9879 this point we have not seen all the input files, so it is
9880 possible that DEF_REGULAR is not set now but will be set
9881 later (it is never cleared). We account for that
9882 possibility below by storing information in the
9883 relocs_copied field of the hash table entry. */
9884 if ((info->shared || htab->root.is_relocatable_executable)
9885 && (sec->flags & SEC_ALLOC) != 0
9886 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
9887 || (h != NULL && ! h->needs_plt
9888 && (! info->symbolic || ! h->def_regular))))
9889 {
9890 struct elf32_arm_relocs_copied *p, **head;
9891
9892 /* When creating a shared object, we must copy these
9893 reloc types into the output file. We create a reloc
9894 section in dynobj and make room for this reloc. */
9895 if (sreloc == NULL)
9896 {
9897 sreloc = _bfd_elf_make_dynamic_reloc_section
9898 (sec, dynobj, 2, abfd, ! htab->use_rel);
9899
9900 if (sreloc == NULL)
9901 return FALSE;
9902
9903 /* BPABI objects never have dynamic relocations mapped. */
9904 if (htab->symbian_p)
9905 {
9906 flagword flags;
9907
9908 flags = bfd_get_section_flags (dynobj, sreloc);
9909 flags &= ~(SEC_LOAD | SEC_ALLOC);
9910 bfd_set_section_flags (dynobj, sreloc, flags);
9911 }
9912 }
9913
9914 /* If this is a global symbol, we count the number of
9915 relocations we need for this symbol. */
9916 if (h != NULL)
9917 {
9918 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
9919 }
9920 else
9921 {
9922 /* Track dynamic relocs needed for local syms too.
9923 We really need local syms available to do this
9924 easily. Oh well. */
9925
9926 asection *s;
9927 void *vpp;
9928
9929 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
9930 sec, r_symndx);
9931 if (s == NULL)
9932 return FALSE;
9933
9934 vpp = &elf_section_data (s)->local_dynrel;
9935 head = (struct elf32_arm_relocs_copied **) vpp;
9936 }
9937
9938 p = *head;
9939 if (p == NULL || p->section != sec)
9940 {
9941 bfd_size_type amt = sizeof *p;
9942
9943 p = bfd_alloc (htab->root.dynobj, amt);
9944 if (p == NULL)
9945 return FALSE;
9946 p->next = *head;
9947 *head = p;
9948 p->section = sec;
9949 p->count = 0;
9950 p->pc_count = 0;
9951 }
9952
9953 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
9954 p->pc_count += 1;
9955 p->count += 1;
9956 }
9957 break;
9958
9959 /* This relocation describes the C++ object vtable hierarchy.
9960 Reconstruct it for later use during GC. */
9961 case R_ARM_GNU_VTINHERIT:
9962 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
9963 return FALSE;
9964 break;
9965
9966 /* This relocation describes which C++ vtable entries are actually
9967 used. Record for later use during GC. */
9968 case R_ARM_GNU_VTENTRY:
9969 BFD_ASSERT (h != NULL);
9970 if (h != NULL
9971 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
9972 return FALSE;
9973 break;
9974 }
9975 }
9976
9977 return TRUE;
9978 }
9979
9980 /* Unwinding tables are not referenced directly. This pass marks them as
9981 required if the corresponding code section is marked. */
9982
9983 static bfd_boolean
9984 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
9985 elf_gc_mark_hook_fn gc_mark_hook)
9986 {
9987 bfd *sub;
9988 Elf_Internal_Shdr **elf_shdrp;
9989 bfd_boolean again;
9990
9991 /* Marking EH data may cause additional code sections to be marked,
9992 requiring multiple passes. */
9993 again = TRUE;
9994 while (again)
9995 {
9996 again = FALSE;
9997 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
9998 {
9999 asection *o;
10000
10001 if (! is_arm_elf (sub))
10002 continue;
10003
10004 elf_shdrp = elf_elfsections (sub);
10005 for (o = sub->sections; o != NULL; o = o->next)
10006 {
10007 Elf_Internal_Shdr *hdr;
10008
10009 hdr = &elf_section_data (o)->this_hdr;
10010 if (hdr->sh_type == SHT_ARM_EXIDX
10011 && hdr->sh_link
10012 && hdr->sh_link < elf_numsections (sub)
10013 && !o->gc_mark
10014 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
10015 {
10016 again = TRUE;
10017 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
10018 return FALSE;
10019 }
10020 }
10021 }
10022 }
10023
10024 return TRUE;
10025 }
10026
10027 /* Treat mapping symbols as special target symbols. */
10028
10029 static bfd_boolean
10030 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
10031 {
10032 return bfd_is_arm_special_symbol_name (sym->name,
10033 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
10034 }
10035
10036 /* This is a copy of elf_find_function() from elf.c except that
10037 ARM mapping symbols are ignored when looking for function names
10038 and STT_ARM_TFUNC is considered to a function type. */
10039
10040 static bfd_boolean
10041 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
10042 asection * section,
10043 asymbol ** symbols,
10044 bfd_vma offset,
10045 const char ** filename_ptr,
10046 const char ** functionname_ptr)
10047 {
10048 const char * filename = NULL;
10049 asymbol * func = NULL;
10050 bfd_vma low_func = 0;
10051 asymbol ** p;
10052
10053 for (p = symbols; *p != NULL; p++)
10054 {
10055 elf_symbol_type *q;
10056
10057 q = (elf_symbol_type *) *p;
10058
10059 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
10060 {
10061 default:
10062 break;
10063 case STT_FILE:
10064 filename = bfd_asymbol_name (&q->symbol);
10065 break;
10066 case STT_FUNC:
10067 case STT_ARM_TFUNC:
10068 case STT_NOTYPE:
10069 /* Skip mapping symbols. */
10070 if ((q->symbol.flags & BSF_LOCAL)
10071 && bfd_is_arm_special_symbol_name (q->symbol.name,
10072 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
10073 continue;
10074 /* Fall through. */
10075 if (bfd_get_section (&q->symbol) == section
10076 && q->symbol.value >= low_func
10077 && q->symbol.value <= offset)
10078 {
10079 func = (asymbol *) q;
10080 low_func = q->symbol.value;
10081 }
10082 break;
10083 }
10084 }
10085
10086 if (func == NULL)
10087 return FALSE;
10088
10089 if (filename_ptr)
10090 *filename_ptr = filename;
10091 if (functionname_ptr)
10092 *functionname_ptr = bfd_asymbol_name (func);
10093
10094 return TRUE;
10095 }
10096
10097
10098 /* Find the nearest line to a particular section and offset, for error
10099 reporting. This code is a duplicate of the code in elf.c, except
10100 that it uses arm_elf_find_function. */
10101
10102 static bfd_boolean
10103 elf32_arm_find_nearest_line (bfd * abfd,
10104 asection * section,
10105 asymbol ** symbols,
10106 bfd_vma offset,
10107 const char ** filename_ptr,
10108 const char ** functionname_ptr,
10109 unsigned int * line_ptr)
10110 {
10111 bfd_boolean found = FALSE;
10112
10113 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
10114
10115 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
10116 filename_ptr, functionname_ptr,
10117 line_ptr, 0,
10118 & elf_tdata (abfd)->dwarf2_find_line_info))
10119 {
10120 if (!*functionname_ptr)
10121 arm_elf_find_function (abfd, section, symbols, offset,
10122 *filename_ptr ? NULL : filename_ptr,
10123 functionname_ptr);
10124
10125 return TRUE;
10126 }
10127
10128 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
10129 & found, filename_ptr,
10130 functionname_ptr, line_ptr,
10131 & elf_tdata (abfd)->line_info))
10132 return FALSE;
10133
10134 if (found && (*functionname_ptr || *line_ptr))
10135 return TRUE;
10136
10137 if (symbols == NULL)
10138 return FALSE;
10139
10140 if (! arm_elf_find_function (abfd, section, symbols, offset,
10141 filename_ptr, functionname_ptr))
10142 return FALSE;
10143
10144 *line_ptr = 0;
10145 return TRUE;
10146 }
10147
10148 static bfd_boolean
10149 elf32_arm_find_inliner_info (bfd * abfd,
10150 const char ** filename_ptr,
10151 const char ** functionname_ptr,
10152 unsigned int * line_ptr)
10153 {
10154 bfd_boolean found;
10155 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
10156 functionname_ptr, line_ptr,
10157 & elf_tdata (abfd)->dwarf2_find_line_info);
10158 return found;
10159 }
10160
10161 /* Adjust a symbol defined by a dynamic object and referenced by a
10162 regular object. The current definition is in some section of the
10163 dynamic object, but we're not including those sections. We have to
10164 change the definition to something the rest of the link can
10165 understand. */
10166
10167 static bfd_boolean
10168 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
10169 struct elf_link_hash_entry * h)
10170 {
10171 bfd * dynobj;
10172 asection * s;
10173 struct elf32_arm_link_hash_entry * eh;
10174 struct elf32_arm_link_hash_table *globals;
10175
10176 globals = elf32_arm_hash_table (info);
10177 dynobj = elf_hash_table (info)->dynobj;
10178
10179 /* Make sure we know what is going on here. */
10180 BFD_ASSERT (dynobj != NULL
10181 && (h->needs_plt
10182 || h->u.weakdef != NULL
10183 || (h->def_dynamic
10184 && h->ref_regular
10185 && !h->def_regular)));
10186
10187 eh = (struct elf32_arm_link_hash_entry *) h;
10188
10189 /* If this is a function, put it in the procedure linkage table. We
10190 will fill in the contents of the procedure linkage table later,
10191 when we know the address of the .got section. */
10192 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
10193 || h->needs_plt)
10194 {
10195 if (h->plt.refcount <= 0
10196 || SYMBOL_CALLS_LOCAL (info, h)
10197 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
10198 && h->root.type == bfd_link_hash_undefweak))
10199 {
10200 /* This case can occur if we saw a PLT32 reloc in an input
10201 file, but the symbol was never referred to by a dynamic
10202 object, or if all references were garbage collected. In
10203 such a case, we don't actually need to build a procedure
10204 linkage table, and we can just do a PC24 reloc instead. */
10205 h->plt.offset = (bfd_vma) -1;
10206 eh->plt_thumb_refcount = 0;
10207 eh->plt_maybe_thumb_refcount = 0;
10208 h->needs_plt = 0;
10209 }
10210
10211 return TRUE;
10212 }
10213 else
10214 {
10215 /* It's possible that we incorrectly decided a .plt reloc was
10216 needed for an R_ARM_PC24 or similar reloc to a non-function sym
10217 in check_relocs. We can't decide accurately between function
10218 and non-function syms in check-relocs; Objects loaded later in
10219 the link may change h->type. So fix it now. */
10220 h->plt.offset = (bfd_vma) -1;
10221 eh->plt_thumb_refcount = 0;
10222 eh->plt_maybe_thumb_refcount = 0;
10223 }
10224
10225 /* If this is a weak symbol, and there is a real definition, the
10226 processor independent code will have arranged for us to see the
10227 real definition first, and we can just use the same value. */
10228 if (h->u.weakdef != NULL)
10229 {
10230 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
10231 || h->u.weakdef->root.type == bfd_link_hash_defweak);
10232 h->root.u.def.section = h->u.weakdef->root.u.def.section;
10233 h->root.u.def.value = h->u.weakdef->root.u.def.value;
10234 return TRUE;
10235 }
10236
10237 /* If there are no non-GOT references, we do not need a copy
10238 relocation. */
10239 if (!h->non_got_ref)
10240 return TRUE;
10241
10242 /* This is a reference to a symbol defined by a dynamic object which
10243 is not a function. */
10244
10245 /* If we are creating a shared library, we must presume that the
10246 only references to the symbol are via the global offset table.
10247 For such cases we need not do anything here; the relocations will
10248 be handled correctly by relocate_section. Relocatable executables
10249 can reference data in shared objects directly, so we don't need to
10250 do anything here. */
10251 if (info->shared || globals->root.is_relocatable_executable)
10252 return TRUE;
10253
10254 if (h->size == 0)
10255 {
10256 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
10257 h->root.root.string);
10258 return TRUE;
10259 }
10260
10261 /* We must allocate the symbol in our .dynbss section, which will
10262 become part of the .bss section of the executable. There will be
10263 an entry for this symbol in the .dynsym section. The dynamic
10264 object will contain position independent code, so all references
10265 from the dynamic object to this symbol will go through the global
10266 offset table. The dynamic linker will use the .dynsym entry to
10267 determine the address it must put in the global offset table, so
10268 both the dynamic object and the regular object will refer to the
10269 same memory location for the variable. */
10270 s = bfd_get_section_by_name (dynobj, ".dynbss");
10271 BFD_ASSERT (s != NULL);
10272
10273 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
10274 copy the initial value out of the dynamic object and into the
10275 runtime process image. We need to remember the offset into the
10276 .rel(a).bss section we are going to use. */
10277 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
10278 {
10279 asection *srel;
10280
10281 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
10282 BFD_ASSERT (srel != NULL);
10283 srel->size += RELOC_SIZE (globals);
10284 h->needs_copy = 1;
10285 }
10286
10287 return _bfd_elf_adjust_dynamic_copy (h, s);
10288 }
10289
10290 /* Allocate space in .plt, .got and associated reloc sections for
10291 dynamic relocs. */
10292
10293 static bfd_boolean
10294 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
10295 {
10296 struct bfd_link_info *info;
10297 struct elf32_arm_link_hash_table *htab;
10298 struct elf32_arm_link_hash_entry *eh;
10299 struct elf32_arm_relocs_copied *p;
10300 bfd_signed_vma thumb_refs;
10301
10302 eh = (struct elf32_arm_link_hash_entry *) h;
10303
10304 if (h->root.type == bfd_link_hash_indirect)
10305 return TRUE;
10306
10307 if (h->root.type == bfd_link_hash_warning)
10308 /* When warning symbols are created, they **replace** the "real"
10309 entry in the hash table, thus we never get to see the real
10310 symbol in a hash traversal. So look at it now. */
10311 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10312
10313 info = (struct bfd_link_info *) inf;
10314 htab = elf32_arm_hash_table (info);
10315
10316 if (htab->root.dynamic_sections_created
10317 && h->plt.refcount > 0)
10318 {
10319 /* Make sure this symbol is output as a dynamic symbol.
10320 Undefined weak syms won't yet be marked as dynamic. */
10321 if (h->dynindx == -1
10322 && !h->forced_local)
10323 {
10324 if (! bfd_elf_link_record_dynamic_symbol (info, h))
10325 return FALSE;
10326 }
10327
10328 if (info->shared
10329 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
10330 {
10331 asection *s = htab->splt;
10332
10333 /* If this is the first .plt entry, make room for the special
10334 first entry. */
10335 if (s->size == 0)
10336 s->size += htab->plt_header_size;
10337
10338 h->plt.offset = s->size;
10339
10340 /* If we will insert a Thumb trampoline before this PLT, leave room
10341 for it. */
10342 thumb_refs = eh->plt_thumb_refcount;
10343 if (!htab->use_blx)
10344 thumb_refs += eh->plt_maybe_thumb_refcount;
10345
10346 if (thumb_refs > 0)
10347 {
10348 h->plt.offset += PLT_THUMB_STUB_SIZE;
10349 s->size += PLT_THUMB_STUB_SIZE;
10350 }
10351
10352 /* If this symbol is not defined in a regular file, and we are
10353 not generating a shared library, then set the symbol to this
10354 location in the .plt. This is required to make function
10355 pointers compare as equal between the normal executable and
10356 the shared library. */
10357 if (! info->shared
10358 && !h->def_regular)
10359 {
10360 h->root.u.def.section = s;
10361 h->root.u.def.value = h->plt.offset;
10362
10363 /* Make sure the function is not marked as Thumb, in case
10364 it is the target of an ABS32 relocation, which will
10365 point to the PLT entry. */
10366 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
10367 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
10368 }
10369
10370 /* Make room for this entry. */
10371 s->size += htab->plt_entry_size;
10372
10373 if (!htab->symbian_p)
10374 {
10375 /* We also need to make an entry in the .got.plt section, which
10376 will be placed in the .got section by the linker script. */
10377 eh->plt_got_offset = htab->sgotplt->size;
10378 htab->sgotplt->size += 4;
10379 }
10380
10381 /* We also need to make an entry in the .rel(a).plt section. */
10382 htab->srelplt->size += RELOC_SIZE (htab);
10383
10384 /* VxWorks executables have a second set of relocations for
10385 each PLT entry. They go in a separate relocation section,
10386 which is processed by the kernel loader. */
10387 if (htab->vxworks_p && !info->shared)
10388 {
10389 /* There is a relocation for the initial PLT entry:
10390 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
10391 if (h->plt.offset == htab->plt_header_size)
10392 htab->srelplt2->size += RELOC_SIZE (htab);
10393
10394 /* There are two extra relocations for each subsequent
10395 PLT entry: an R_ARM_32 relocation for the GOT entry,
10396 and an R_ARM_32 relocation for the PLT entry. */
10397 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
10398 }
10399 }
10400 else
10401 {
10402 h->plt.offset = (bfd_vma) -1;
10403 h->needs_plt = 0;
10404 }
10405 }
10406 else
10407 {
10408 h->plt.offset = (bfd_vma) -1;
10409 h->needs_plt = 0;
10410 }
10411
10412 if (h->got.refcount > 0)
10413 {
10414 asection *s;
10415 bfd_boolean dyn;
10416 int tls_type = elf32_arm_hash_entry (h)->tls_type;
10417 int indx;
10418
10419 /* Make sure this symbol is output as a dynamic symbol.
10420 Undefined weak syms won't yet be marked as dynamic. */
10421 if (h->dynindx == -1
10422 && !h->forced_local)
10423 {
10424 if (! bfd_elf_link_record_dynamic_symbol (info, h))
10425 return FALSE;
10426 }
10427
10428 if (!htab->symbian_p)
10429 {
10430 s = htab->sgot;
10431 h->got.offset = s->size;
10432
10433 if (tls_type == GOT_UNKNOWN)
10434 abort ();
10435
10436 if (tls_type == GOT_NORMAL)
10437 /* Non-TLS symbols need one GOT slot. */
10438 s->size += 4;
10439 else
10440 {
10441 if (tls_type & GOT_TLS_GD)
10442 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
10443 s->size += 8;
10444 if (tls_type & GOT_TLS_IE)
10445 /* R_ARM_TLS_IE32 needs one GOT slot. */
10446 s->size += 4;
10447 }
10448
10449 dyn = htab->root.dynamic_sections_created;
10450
10451 indx = 0;
10452 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
10453 && (!info->shared
10454 || !SYMBOL_REFERENCES_LOCAL (info, h)))
10455 indx = h->dynindx;
10456
10457 if (tls_type != GOT_NORMAL
10458 && (info->shared || indx != 0)
10459 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10460 || h->root.type != bfd_link_hash_undefweak))
10461 {
10462 if (tls_type & GOT_TLS_IE)
10463 htab->srelgot->size += RELOC_SIZE (htab);
10464
10465 if (tls_type & GOT_TLS_GD)
10466 htab->srelgot->size += RELOC_SIZE (htab);
10467
10468 if ((tls_type & GOT_TLS_GD) && indx != 0)
10469 htab->srelgot->size += RELOC_SIZE (htab);
10470 }
10471 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
10472 || h->root.type != bfd_link_hash_undefweak)
10473 && (info->shared
10474 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
10475 htab->srelgot->size += RELOC_SIZE (htab);
10476 }
10477 }
10478 else
10479 h->got.offset = (bfd_vma) -1;
10480
10481 /* Allocate stubs for exported Thumb functions on v4t. */
10482 if (!htab->use_blx && h->dynindx != -1
10483 && h->def_regular
10484 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
10485 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
10486 {
10487 struct elf_link_hash_entry * th;
10488 struct bfd_link_hash_entry * bh;
10489 struct elf_link_hash_entry * myh;
10490 char name[1024];
10491 asection *s;
10492 bh = NULL;
10493 /* Create a new symbol to regist the real location of the function. */
10494 s = h->root.u.def.section;
10495 sprintf (name, "__real_%s", h->root.root.string);
10496 _bfd_generic_link_add_one_symbol (info, s->owner,
10497 name, BSF_GLOBAL, s,
10498 h->root.u.def.value,
10499 NULL, TRUE, FALSE, &bh);
10500
10501 myh = (struct elf_link_hash_entry *) bh;
10502 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
10503 myh->forced_local = 1;
10504 eh->export_glue = myh;
10505 th = record_arm_to_thumb_glue (info, h);
10506 /* Point the symbol at the stub. */
10507 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
10508 h->root.u.def.section = th->root.u.def.section;
10509 h->root.u.def.value = th->root.u.def.value & ~1;
10510 }
10511
10512 if (eh->relocs_copied == NULL)
10513 return TRUE;
10514
10515 /* In the shared -Bsymbolic case, discard space allocated for
10516 dynamic pc-relative relocs against symbols which turn out to be
10517 defined in regular objects. For the normal shared case, discard
10518 space for pc-relative relocs that have become local due to symbol
10519 visibility changes. */
10520
10521 if (info->shared || htab->root.is_relocatable_executable)
10522 {
10523 /* The only relocs that use pc_count are R_ARM_REL32 and
10524 R_ARM_REL32_NOI, which will appear on something like
10525 ".long foo - .". We want calls to protected symbols to resolve
10526 directly to the function rather than going via the plt. If people
10527 want function pointer comparisons to work as expected then they
10528 should avoid writing assembly like ".long foo - .". */
10529 if (SYMBOL_CALLS_LOCAL (info, h))
10530 {
10531 struct elf32_arm_relocs_copied **pp;
10532
10533 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
10534 {
10535 p->count -= p->pc_count;
10536 p->pc_count = 0;
10537 if (p->count == 0)
10538 *pp = p->next;
10539 else
10540 pp = &p->next;
10541 }
10542 }
10543
10544 if (elf32_arm_hash_table (info)->vxworks_p)
10545 {
10546 struct elf32_arm_relocs_copied **pp;
10547
10548 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
10549 {
10550 if (strcmp (p->section->output_section->name, ".tls_vars") == 0)
10551 *pp = p->next;
10552 else
10553 pp = &p->next;
10554 }
10555 }
10556
10557 /* Also discard relocs on undefined weak syms with non-default
10558 visibility. */
10559 if (eh->relocs_copied != NULL
10560 && h->root.type == bfd_link_hash_undefweak)
10561 {
10562 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
10563 eh->relocs_copied = NULL;
10564
10565 /* Make sure undefined weak symbols are output as a dynamic
10566 symbol in PIEs. */
10567 else if (h->dynindx == -1
10568 && !h->forced_local)
10569 {
10570 if (! bfd_elf_link_record_dynamic_symbol (info, h))
10571 return FALSE;
10572 }
10573 }
10574
10575 else if (htab->root.is_relocatable_executable && h->dynindx == -1
10576 && h->root.type == bfd_link_hash_new)
10577 {
10578 /* Output absolute symbols so that we can create relocations
10579 against them. For normal symbols we output a relocation
10580 against the section that contains them. */
10581 if (! bfd_elf_link_record_dynamic_symbol (info, h))
10582 return FALSE;
10583 }
10584
10585 }
10586 else
10587 {
10588 /* For the non-shared case, discard space for relocs against
10589 symbols which turn out to need copy relocs or are not
10590 dynamic. */
10591
10592 if (!h->non_got_ref
10593 && ((h->def_dynamic
10594 && !h->def_regular)
10595 || (htab->root.dynamic_sections_created
10596 && (h->root.type == bfd_link_hash_undefweak
10597 || h->root.type == bfd_link_hash_undefined))))
10598 {
10599 /* Make sure this symbol is output as a dynamic symbol.
10600 Undefined weak syms won't yet be marked as dynamic. */
10601 if (h->dynindx == -1
10602 && !h->forced_local)
10603 {
10604 if (! bfd_elf_link_record_dynamic_symbol (info, h))
10605 return FALSE;
10606 }
10607
10608 /* If that succeeded, we know we'll be keeping all the
10609 relocs. */
10610 if (h->dynindx != -1)
10611 goto keep;
10612 }
10613
10614 eh->relocs_copied = NULL;
10615
10616 keep: ;
10617 }
10618
10619 /* Finally, allocate space. */
10620 for (p = eh->relocs_copied; p != NULL; p = p->next)
10621 {
10622 asection *sreloc = elf_section_data (p->section)->sreloc;
10623 sreloc->size += p->count * RELOC_SIZE (htab);
10624 }
10625
10626 return TRUE;
10627 }
10628
10629 /* Find any dynamic relocs that apply to read-only sections. */
10630
10631 static bfd_boolean
10632 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
10633 {
10634 struct elf32_arm_link_hash_entry * eh;
10635 struct elf32_arm_relocs_copied * p;
10636
10637 if (h->root.type == bfd_link_hash_warning)
10638 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10639
10640 eh = (struct elf32_arm_link_hash_entry *) h;
10641 for (p = eh->relocs_copied; p != NULL; p = p->next)
10642 {
10643 asection *s = p->section;
10644
10645 if (s != NULL && (s->flags & SEC_READONLY) != 0)
10646 {
10647 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10648
10649 info->flags |= DF_TEXTREL;
10650
10651 /* Not an error, just cut short the traversal. */
10652 return FALSE;
10653 }
10654 }
10655 return TRUE;
10656 }
10657
10658 void
10659 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
10660 int byteswap_code)
10661 {
10662 struct elf32_arm_link_hash_table *globals;
10663
10664 globals = elf32_arm_hash_table (info);
10665 globals->byteswap_code = byteswap_code;
10666 }
10667
10668 /* Set the sizes of the dynamic sections. */
10669
10670 static bfd_boolean
10671 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
10672 struct bfd_link_info * info)
10673 {
10674 bfd * dynobj;
10675 asection * s;
10676 bfd_boolean plt;
10677 bfd_boolean relocs;
10678 bfd *ibfd;
10679 struct elf32_arm_link_hash_table *htab;
10680
10681 htab = elf32_arm_hash_table (info);
10682 dynobj = elf_hash_table (info)->dynobj;
10683 BFD_ASSERT (dynobj != NULL);
10684 check_use_blx (htab);
10685
10686 if (elf_hash_table (info)->dynamic_sections_created)
10687 {
10688 /* Set the contents of the .interp section to the interpreter. */
10689 if (info->executable)
10690 {
10691 s = bfd_get_section_by_name (dynobj, ".interp");
10692 BFD_ASSERT (s != NULL);
10693 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10694 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10695 }
10696 }
10697
10698 /* Set up .got offsets for local syms, and space for local dynamic
10699 relocs. */
10700 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10701 {
10702 bfd_signed_vma *local_got;
10703 bfd_signed_vma *end_local_got;
10704 char *local_tls_type;
10705 bfd_size_type locsymcount;
10706 Elf_Internal_Shdr *symtab_hdr;
10707 asection *srel;
10708 bfd_boolean is_vxworks = elf32_arm_hash_table (info)->vxworks_p;
10709
10710 if (! is_arm_elf (ibfd))
10711 continue;
10712
10713 for (s = ibfd->sections; s != NULL; s = s->next)
10714 {
10715 struct elf32_arm_relocs_copied *p;
10716
10717 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10718 {
10719 if (!bfd_is_abs_section (p->section)
10720 && bfd_is_abs_section (p->section->output_section))
10721 {
10722 /* Input section has been discarded, either because
10723 it is a copy of a linkonce section or due to
10724 linker script /DISCARD/, so we'll be discarding
10725 the relocs too. */
10726 }
10727 else if (is_vxworks
10728 && strcmp (p->section->output_section->name,
10729 ".tls_vars") == 0)
10730 {
10731 /* Relocations in vxworks .tls_vars sections are
10732 handled specially by the loader. */
10733 }
10734 else if (p->count != 0)
10735 {
10736 srel = elf_section_data (p->section)->sreloc;
10737 srel->size += p->count * RELOC_SIZE (htab);
10738 if ((p->section->output_section->flags & SEC_READONLY) != 0)
10739 info->flags |= DF_TEXTREL;
10740 }
10741 }
10742 }
10743
10744 local_got = elf_local_got_refcounts (ibfd);
10745 if (!local_got)
10746 continue;
10747
10748 symtab_hdr = & elf_symtab_hdr (ibfd);
10749 locsymcount = symtab_hdr->sh_info;
10750 end_local_got = local_got + locsymcount;
10751 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
10752 s = htab->sgot;
10753 srel = htab->srelgot;
10754 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
10755 {
10756 if (*local_got > 0)
10757 {
10758 *local_got = s->size;
10759 if (*local_tls_type & GOT_TLS_GD)
10760 /* TLS_GD relocs need an 8-byte structure in the GOT. */
10761 s->size += 8;
10762 if (*local_tls_type & GOT_TLS_IE)
10763 s->size += 4;
10764 if (*local_tls_type == GOT_NORMAL)
10765 s->size += 4;
10766
10767 if (info->shared || *local_tls_type == GOT_TLS_GD)
10768 srel->size += RELOC_SIZE (htab);
10769 }
10770 else
10771 *local_got = (bfd_vma) -1;
10772 }
10773 }
10774
10775 if (htab->tls_ldm_got.refcount > 0)
10776 {
10777 /* Allocate two GOT entries and one dynamic relocation (if necessary)
10778 for R_ARM_TLS_LDM32 relocations. */
10779 htab->tls_ldm_got.offset = htab->sgot->size;
10780 htab->sgot->size += 8;
10781 if (info->shared)
10782 htab->srelgot->size += RELOC_SIZE (htab);
10783 }
10784 else
10785 htab->tls_ldm_got.offset = -1;
10786
10787 /* Allocate global sym .plt and .got entries, and space for global
10788 sym dynamic relocs. */
10789 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
10790
10791 /* Here we rummage through the found bfds to collect glue information. */
10792 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10793 {
10794 if (! is_arm_elf (ibfd))
10795 continue;
10796
10797 /* Initialise mapping tables for code/data. */
10798 bfd_elf32_arm_init_maps (ibfd);
10799
10800 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
10801 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
10802 /* xgettext:c-format */
10803 _bfd_error_handler (_("Errors encountered processing file %s"),
10804 ibfd->filename);
10805 }
10806
10807 /* Allocate space for the glue sections now that we've sized them. */
10808 bfd_elf32_arm_allocate_interworking_sections (info);
10809
10810 /* The check_relocs and adjust_dynamic_symbol entry points have
10811 determined the sizes of the various dynamic sections. Allocate
10812 memory for them. */
10813 plt = FALSE;
10814 relocs = FALSE;
10815 for (s = dynobj->sections; s != NULL; s = s->next)
10816 {
10817 const char * name;
10818
10819 if ((s->flags & SEC_LINKER_CREATED) == 0)
10820 continue;
10821
10822 /* It's OK to base decisions on the section name, because none
10823 of the dynobj section names depend upon the input files. */
10824 name = bfd_get_section_name (dynobj, s);
10825
10826 if (strcmp (name, ".plt") == 0)
10827 {
10828 /* Remember whether there is a PLT. */
10829 plt = s->size != 0;
10830 }
10831 else if (CONST_STRNEQ (name, ".rel"))
10832 {
10833 if (s->size != 0)
10834 {
10835 /* Remember whether there are any reloc sections other
10836 than .rel(a).plt and .rela.plt.unloaded. */
10837 if (s != htab->srelplt && s != htab->srelplt2)
10838 relocs = TRUE;
10839
10840 /* We use the reloc_count field as a counter if we need
10841 to copy relocs into the output file. */
10842 s->reloc_count = 0;
10843 }
10844 }
10845 else if (! CONST_STRNEQ (name, ".got")
10846 && strcmp (name, ".dynbss") != 0)
10847 {
10848 /* It's not one of our sections, so don't allocate space. */
10849 continue;
10850 }
10851
10852 if (s->size == 0)
10853 {
10854 /* If we don't need this section, strip it from the
10855 output file. This is mostly to handle .rel(a).bss and
10856 .rel(a).plt. We must create both sections in
10857 create_dynamic_sections, because they must be created
10858 before the linker maps input sections to output
10859 sections. The linker does that before
10860 adjust_dynamic_symbol is called, and it is that
10861 function which decides whether anything needs to go
10862 into these sections. */
10863 s->flags |= SEC_EXCLUDE;
10864 continue;
10865 }
10866
10867 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10868 continue;
10869
10870 /* Allocate memory for the section contents. */
10871 s->contents = bfd_zalloc (dynobj, s->size);
10872 if (s->contents == NULL)
10873 return FALSE;
10874 }
10875
10876 if (elf_hash_table (info)->dynamic_sections_created)
10877 {
10878 /* Add some entries to the .dynamic section. We fill in the
10879 values later, in elf32_arm_finish_dynamic_sections, but we
10880 must add the entries now so that we get the correct size for
10881 the .dynamic section. The DT_DEBUG entry is filled in by the
10882 dynamic linker and used by the debugger. */
10883 #define add_dynamic_entry(TAG, VAL) \
10884 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10885
10886 if (info->executable)
10887 {
10888 if (!add_dynamic_entry (DT_DEBUG, 0))
10889 return FALSE;
10890 }
10891
10892 if (plt)
10893 {
10894 if ( !add_dynamic_entry (DT_PLTGOT, 0)
10895 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10896 || !add_dynamic_entry (DT_PLTREL,
10897 htab->use_rel ? DT_REL : DT_RELA)
10898 || !add_dynamic_entry (DT_JMPREL, 0))
10899 return FALSE;
10900 }
10901
10902 if (relocs)
10903 {
10904 if (htab->use_rel)
10905 {
10906 if (!add_dynamic_entry (DT_REL, 0)
10907 || !add_dynamic_entry (DT_RELSZ, 0)
10908 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
10909 return FALSE;
10910 }
10911 else
10912 {
10913 if (!add_dynamic_entry (DT_RELA, 0)
10914 || !add_dynamic_entry (DT_RELASZ, 0)
10915 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
10916 return FALSE;
10917 }
10918 }
10919
10920 /* If any dynamic relocs apply to a read-only section,
10921 then we need a DT_TEXTREL entry. */
10922 if ((info->flags & DF_TEXTREL) == 0)
10923 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
10924 info);
10925
10926 if ((info->flags & DF_TEXTREL) != 0)
10927 {
10928 if (!add_dynamic_entry (DT_TEXTREL, 0))
10929 return FALSE;
10930 }
10931 if (htab->vxworks_p
10932 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
10933 return FALSE;
10934 }
10935 #undef add_dynamic_entry
10936
10937 return TRUE;
10938 }
10939
10940 /* Finish up dynamic symbol handling. We set the contents of various
10941 dynamic sections here. */
10942
10943 static bfd_boolean
10944 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
10945 struct bfd_link_info * info,
10946 struct elf_link_hash_entry * h,
10947 Elf_Internal_Sym * sym)
10948 {
10949 bfd * dynobj;
10950 struct elf32_arm_link_hash_table *htab;
10951 struct elf32_arm_link_hash_entry *eh;
10952
10953 dynobj = elf_hash_table (info)->dynobj;
10954 htab = elf32_arm_hash_table (info);
10955 eh = (struct elf32_arm_link_hash_entry *) h;
10956
10957 if (h->plt.offset != (bfd_vma) -1)
10958 {
10959 asection * splt;
10960 asection * srel;
10961 bfd_byte *loc;
10962 bfd_vma plt_index;
10963 Elf_Internal_Rela rel;
10964
10965 /* This symbol has an entry in the procedure linkage table. Set
10966 it up. */
10967
10968 BFD_ASSERT (h->dynindx != -1);
10969
10970 splt = bfd_get_section_by_name (dynobj, ".plt");
10971 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
10972 BFD_ASSERT (splt != NULL && srel != NULL);
10973
10974 /* Fill in the entry in the procedure linkage table. */
10975 if (htab->symbian_p)
10976 {
10977 put_arm_insn (htab, output_bfd,
10978 elf32_arm_symbian_plt_entry[0],
10979 splt->contents + h->plt.offset);
10980 bfd_put_32 (output_bfd,
10981 elf32_arm_symbian_plt_entry[1],
10982 splt->contents + h->plt.offset + 4);
10983
10984 /* Fill in the entry in the .rel.plt section. */
10985 rel.r_offset = (splt->output_section->vma
10986 + splt->output_offset
10987 + h->plt.offset + 4);
10988 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10989
10990 /* Get the index in the procedure linkage table which
10991 corresponds to this symbol. This is the index of this symbol
10992 in all the symbols for which we are making plt entries. The
10993 first entry in the procedure linkage table is reserved. */
10994 plt_index = ((h->plt.offset - htab->plt_header_size)
10995 / htab->plt_entry_size);
10996 }
10997 else
10998 {
10999 bfd_vma got_offset, got_address, plt_address;
11000 bfd_vma got_displacement;
11001 asection * sgot;
11002 bfd_byte * ptr;
11003
11004 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
11005 BFD_ASSERT (sgot != NULL);
11006
11007 /* Get the offset into the .got.plt table of the entry that
11008 corresponds to this function. */
11009 got_offset = eh->plt_got_offset;
11010
11011 /* Get the index in the procedure linkage table which
11012 corresponds to this symbol. This is the index of this symbol
11013 in all the symbols for which we are making plt entries. The
11014 first three entries in .got.plt are reserved; after that
11015 symbols appear in the same order as in .plt. */
11016 plt_index = (got_offset - 12) / 4;
11017
11018 /* Calculate the address of the GOT entry. */
11019 got_address = (sgot->output_section->vma
11020 + sgot->output_offset
11021 + got_offset);
11022
11023 /* ...and the address of the PLT entry. */
11024 plt_address = (splt->output_section->vma
11025 + splt->output_offset
11026 + h->plt.offset);
11027
11028 ptr = htab->splt->contents + h->plt.offset;
11029 if (htab->vxworks_p && info->shared)
11030 {
11031 unsigned int i;
11032 bfd_vma val;
11033
11034 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
11035 {
11036 val = elf32_arm_vxworks_shared_plt_entry[i];
11037 if (i == 2)
11038 val |= got_address - sgot->output_section->vma;
11039 if (i == 5)
11040 val |= plt_index * RELOC_SIZE (htab);
11041 if (i == 2 || i == 5)
11042 bfd_put_32 (output_bfd, val, ptr);
11043 else
11044 put_arm_insn (htab, output_bfd, val, ptr);
11045 }
11046 }
11047 else if (htab->vxworks_p)
11048 {
11049 unsigned int i;
11050 bfd_vma val;
11051
11052 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
11053 {
11054 val = elf32_arm_vxworks_exec_plt_entry[i];
11055 if (i == 2)
11056 val |= got_address;
11057 if (i == 4)
11058 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
11059 if (i == 5)
11060 val |= plt_index * RELOC_SIZE (htab);
11061 if (i == 2 || i == 5)
11062 bfd_put_32 (output_bfd, val, ptr);
11063 else
11064 put_arm_insn (htab, output_bfd, val, ptr);
11065 }
11066
11067 loc = (htab->srelplt2->contents
11068 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
11069
11070 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
11071 referencing the GOT for this PLT entry. */
11072 rel.r_offset = plt_address + 8;
11073 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
11074 rel.r_addend = got_offset;
11075 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
11076 loc += RELOC_SIZE (htab);
11077
11078 /* Create the R_ARM_ABS32 relocation referencing the
11079 beginning of the PLT for this GOT entry. */
11080 rel.r_offset = got_address;
11081 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
11082 rel.r_addend = 0;
11083 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
11084 }
11085 else
11086 {
11087 bfd_signed_vma thumb_refs;
11088 /* Calculate the displacement between the PLT slot and the
11089 entry in the GOT. The eight-byte offset accounts for the
11090 value produced by adding to pc in the first instruction
11091 of the PLT stub. */
11092 got_displacement = got_address - (plt_address + 8);
11093
11094 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
11095
11096 thumb_refs = eh->plt_thumb_refcount;
11097 if (!htab->use_blx)
11098 thumb_refs += eh->plt_maybe_thumb_refcount;
11099
11100 if (thumb_refs > 0)
11101 {
11102 put_thumb_insn (htab, output_bfd,
11103 elf32_arm_plt_thumb_stub[0], ptr - 4);
11104 put_thumb_insn (htab, output_bfd,
11105 elf32_arm_plt_thumb_stub[1], ptr - 2);
11106 }
11107
11108 put_arm_insn (htab, output_bfd,
11109 elf32_arm_plt_entry[0]
11110 | ((got_displacement & 0x0ff00000) >> 20),
11111 ptr + 0);
11112 put_arm_insn (htab, output_bfd,
11113 elf32_arm_plt_entry[1]
11114 | ((got_displacement & 0x000ff000) >> 12),
11115 ptr+ 4);
11116 put_arm_insn (htab, output_bfd,
11117 elf32_arm_plt_entry[2]
11118 | (got_displacement & 0x00000fff),
11119 ptr + 8);
11120 #ifdef FOUR_WORD_PLT
11121 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
11122 #endif
11123 }
11124
11125 /* Fill in the entry in the global offset table. */
11126 bfd_put_32 (output_bfd,
11127 (splt->output_section->vma
11128 + splt->output_offset),
11129 sgot->contents + got_offset);
11130
11131 /* Fill in the entry in the .rel(a).plt section. */
11132 rel.r_addend = 0;
11133 rel.r_offset = got_address;
11134 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
11135 }
11136
11137 loc = srel->contents + plt_index * RELOC_SIZE (htab);
11138 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
11139
11140 if (!h->def_regular)
11141 {
11142 /* Mark the symbol as undefined, rather than as defined in
11143 the .plt section. Leave the value alone. */
11144 sym->st_shndx = SHN_UNDEF;
11145 /* If the symbol is weak, we do need to clear the value.
11146 Otherwise, the PLT entry would provide a definition for
11147 the symbol even if the symbol wasn't defined anywhere,
11148 and so the symbol would never be NULL. */
11149 if (!h->ref_regular_nonweak)
11150 sym->st_value = 0;
11151 }
11152 }
11153
11154 if (h->got.offset != (bfd_vma) -1
11155 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
11156 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
11157 {
11158 asection * sgot;
11159 asection * srel;
11160 Elf_Internal_Rela rel;
11161 bfd_byte *loc;
11162 bfd_vma offset;
11163
11164 /* This symbol has an entry in the global offset table. Set it
11165 up. */
11166 sgot = bfd_get_section_by_name (dynobj, ".got");
11167 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
11168 BFD_ASSERT (sgot != NULL && srel != NULL);
11169
11170 offset = (h->got.offset & ~(bfd_vma) 1);
11171 rel.r_addend = 0;
11172 rel.r_offset = (sgot->output_section->vma
11173 + sgot->output_offset
11174 + offset);
11175
11176 /* If this is a static link, or it is a -Bsymbolic link and the
11177 symbol is defined locally or was forced to be local because
11178 of a version file, we just want to emit a RELATIVE reloc.
11179 The entry in the global offset table will already have been
11180 initialized in the relocate_section function. */
11181 if (info->shared
11182 && SYMBOL_REFERENCES_LOCAL (info, h))
11183 {
11184 BFD_ASSERT ((h->got.offset & 1) != 0);
11185 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
11186 if (!htab->use_rel)
11187 {
11188 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
11189 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
11190 }
11191 }
11192 else
11193 {
11194 BFD_ASSERT ((h->got.offset & 1) == 0);
11195 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
11196 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
11197 }
11198
11199 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
11200 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
11201 }
11202
11203 if (h->needs_copy)
11204 {
11205 asection * s;
11206 Elf_Internal_Rela rel;
11207 bfd_byte *loc;
11208
11209 /* This symbol needs a copy reloc. Set it up. */
11210 BFD_ASSERT (h->dynindx != -1
11211 && (h->root.type == bfd_link_hash_defined
11212 || h->root.type == bfd_link_hash_defweak));
11213
11214 s = bfd_get_section_by_name (h->root.u.def.section->owner,
11215 RELOC_SECTION (htab, ".bss"));
11216 BFD_ASSERT (s != NULL);
11217
11218 rel.r_addend = 0;
11219 rel.r_offset = (h->root.u.def.value
11220 + h->root.u.def.section->output_section->vma
11221 + h->root.u.def.section->output_offset);
11222 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
11223 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
11224 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
11225 }
11226
11227 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
11228 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
11229 to the ".got" section. */
11230 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
11231 || (!htab->vxworks_p && h == htab->root.hgot))
11232 sym->st_shndx = SHN_ABS;
11233
11234 return TRUE;
11235 }
11236
11237 /* Finish up the dynamic sections. */
11238
11239 static bfd_boolean
11240 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
11241 {
11242 bfd * dynobj;
11243 asection * sgot;
11244 asection * sdyn;
11245
11246 dynobj = elf_hash_table (info)->dynobj;
11247
11248 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
11249 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
11250 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11251
11252 if (elf_hash_table (info)->dynamic_sections_created)
11253 {
11254 asection *splt;
11255 Elf32_External_Dyn *dyncon, *dynconend;
11256 struct elf32_arm_link_hash_table *htab;
11257
11258 htab = elf32_arm_hash_table (info);
11259 splt = bfd_get_section_by_name (dynobj, ".plt");
11260 BFD_ASSERT (splt != NULL && sdyn != NULL);
11261
11262 dyncon = (Elf32_External_Dyn *) sdyn->contents;
11263 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
11264
11265 for (; dyncon < dynconend; dyncon++)
11266 {
11267 Elf_Internal_Dyn dyn;
11268 const char * name;
11269 asection * s;
11270
11271 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
11272
11273 switch (dyn.d_tag)
11274 {
11275 unsigned int type;
11276
11277 default:
11278 if (htab->vxworks_p
11279 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
11280 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11281 break;
11282
11283 case DT_HASH:
11284 name = ".hash";
11285 goto get_vma_if_bpabi;
11286 case DT_STRTAB:
11287 name = ".dynstr";
11288 goto get_vma_if_bpabi;
11289 case DT_SYMTAB:
11290 name = ".dynsym";
11291 goto get_vma_if_bpabi;
11292 case DT_VERSYM:
11293 name = ".gnu.version";
11294 goto get_vma_if_bpabi;
11295 case DT_VERDEF:
11296 name = ".gnu.version_d";
11297 goto get_vma_if_bpabi;
11298 case DT_VERNEED:
11299 name = ".gnu.version_r";
11300 goto get_vma_if_bpabi;
11301
11302 case DT_PLTGOT:
11303 name = ".got";
11304 goto get_vma;
11305 case DT_JMPREL:
11306 name = RELOC_SECTION (htab, ".plt");
11307 get_vma:
11308 s = bfd_get_section_by_name (output_bfd, name);
11309 BFD_ASSERT (s != NULL);
11310 if (!htab->symbian_p)
11311 dyn.d_un.d_ptr = s->vma;
11312 else
11313 /* In the BPABI, tags in the PT_DYNAMIC section point
11314 at the file offset, not the memory address, for the
11315 convenience of the post linker. */
11316 dyn.d_un.d_ptr = s->filepos;
11317 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11318 break;
11319
11320 get_vma_if_bpabi:
11321 if (htab->symbian_p)
11322 goto get_vma;
11323 break;
11324
11325 case DT_PLTRELSZ:
11326 s = bfd_get_section_by_name (output_bfd,
11327 RELOC_SECTION (htab, ".plt"));
11328 BFD_ASSERT (s != NULL);
11329 dyn.d_un.d_val = s->size;
11330 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11331 break;
11332
11333 case DT_RELSZ:
11334 case DT_RELASZ:
11335 if (!htab->symbian_p)
11336 {
11337 /* My reading of the SVR4 ABI indicates that the
11338 procedure linkage table relocs (DT_JMPREL) should be
11339 included in the overall relocs (DT_REL). This is
11340 what Solaris does. However, UnixWare can not handle
11341 that case. Therefore, we override the DT_RELSZ entry
11342 here to make it not include the JMPREL relocs. Since
11343 the linker script arranges for .rel(a).plt to follow all
11344 other relocation sections, we don't have to worry
11345 about changing the DT_REL entry. */
11346 s = bfd_get_section_by_name (output_bfd,
11347 RELOC_SECTION (htab, ".plt"));
11348 if (s != NULL)
11349 dyn.d_un.d_val -= s->size;
11350 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11351 break;
11352 }
11353 /* Fall through. */
11354
11355 case DT_REL:
11356 case DT_RELA:
11357 /* In the BPABI, the DT_REL tag must point at the file
11358 offset, not the VMA, of the first relocation
11359 section. So, we use code similar to that in
11360 elflink.c, but do not check for SHF_ALLOC on the
11361 relcoation section, since relocations sections are
11362 never allocated under the BPABI. The comments above
11363 about Unixware notwithstanding, we include all of the
11364 relocations here. */
11365 if (htab->symbian_p)
11366 {
11367 unsigned int i;
11368 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
11369 ? SHT_REL : SHT_RELA);
11370 dyn.d_un.d_val = 0;
11371 for (i = 1; i < elf_numsections (output_bfd); i++)
11372 {
11373 Elf_Internal_Shdr *hdr
11374 = elf_elfsections (output_bfd)[i];
11375 if (hdr->sh_type == type)
11376 {
11377 if (dyn.d_tag == DT_RELSZ
11378 || dyn.d_tag == DT_RELASZ)
11379 dyn.d_un.d_val += hdr->sh_size;
11380 else if ((ufile_ptr) hdr->sh_offset
11381 <= dyn.d_un.d_val - 1)
11382 dyn.d_un.d_val = hdr->sh_offset;
11383 }
11384 }
11385 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11386 }
11387 break;
11388
11389 /* Set the bottom bit of DT_INIT/FINI if the
11390 corresponding function is Thumb. */
11391 case DT_INIT:
11392 name = info->init_function;
11393 goto get_sym;
11394 case DT_FINI:
11395 name = info->fini_function;
11396 get_sym:
11397 /* If it wasn't set by elf_bfd_final_link
11398 then there is nothing to adjust. */
11399 if (dyn.d_un.d_val != 0)
11400 {
11401 struct elf_link_hash_entry * eh;
11402
11403 eh = elf_link_hash_lookup (elf_hash_table (info), name,
11404 FALSE, FALSE, TRUE);
11405 if (eh != NULL
11406 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
11407 {
11408 dyn.d_un.d_val |= 1;
11409 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11410 }
11411 }
11412 break;
11413 }
11414 }
11415
11416 /* Fill in the first entry in the procedure linkage table. */
11417 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
11418 {
11419 const bfd_vma *plt0_entry;
11420 bfd_vma got_address, plt_address, got_displacement;
11421
11422 /* Calculate the addresses of the GOT and PLT. */
11423 got_address = sgot->output_section->vma + sgot->output_offset;
11424 plt_address = splt->output_section->vma + splt->output_offset;
11425
11426 if (htab->vxworks_p)
11427 {
11428 /* The VxWorks GOT is relocated by the dynamic linker.
11429 Therefore, we must emit relocations rather than simply
11430 computing the values now. */
11431 Elf_Internal_Rela rel;
11432
11433 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
11434 put_arm_insn (htab, output_bfd, plt0_entry[0],
11435 splt->contents + 0);
11436 put_arm_insn (htab, output_bfd, plt0_entry[1],
11437 splt->contents + 4);
11438 put_arm_insn (htab, output_bfd, plt0_entry[2],
11439 splt->contents + 8);
11440 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
11441
11442 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
11443 rel.r_offset = plt_address + 12;
11444 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
11445 rel.r_addend = 0;
11446 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
11447 htab->srelplt2->contents);
11448 }
11449 else
11450 {
11451 got_displacement = got_address - (plt_address + 16);
11452
11453 plt0_entry = elf32_arm_plt0_entry;
11454 put_arm_insn (htab, output_bfd, plt0_entry[0],
11455 splt->contents + 0);
11456 put_arm_insn (htab, output_bfd, plt0_entry[1],
11457 splt->contents + 4);
11458 put_arm_insn (htab, output_bfd, plt0_entry[2],
11459 splt->contents + 8);
11460 put_arm_insn (htab, output_bfd, plt0_entry[3],
11461 splt->contents + 12);
11462
11463 #ifdef FOUR_WORD_PLT
11464 /* The displacement value goes in the otherwise-unused
11465 last word of the second entry. */
11466 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
11467 #else
11468 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
11469 #endif
11470 }
11471 }
11472
11473 /* UnixWare sets the entsize of .plt to 4, although that doesn't
11474 really seem like the right value. */
11475 if (splt->output_section->owner == output_bfd)
11476 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
11477
11478 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
11479 {
11480 /* Correct the .rel(a).plt.unloaded relocations. They will have
11481 incorrect symbol indexes. */
11482 int num_plts;
11483 unsigned char *p;
11484
11485 num_plts = ((htab->splt->size - htab->plt_header_size)
11486 / htab->plt_entry_size);
11487 p = htab->srelplt2->contents + RELOC_SIZE (htab);
11488
11489 for (; num_plts; num_plts--)
11490 {
11491 Elf_Internal_Rela rel;
11492
11493 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
11494 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
11495 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
11496 p += RELOC_SIZE (htab);
11497
11498 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
11499 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
11500 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
11501 p += RELOC_SIZE (htab);
11502 }
11503 }
11504 }
11505
11506 /* Fill in the first three entries in the global offset table. */
11507 if (sgot)
11508 {
11509 if (sgot->size > 0)
11510 {
11511 if (sdyn == NULL)
11512 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
11513 else
11514 bfd_put_32 (output_bfd,
11515 sdyn->output_section->vma + sdyn->output_offset,
11516 sgot->contents);
11517 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
11518 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
11519 }
11520
11521 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
11522 }
11523
11524 return TRUE;
11525 }
11526
11527 static void
11528 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
11529 {
11530 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
11531 struct elf32_arm_link_hash_table *globals;
11532
11533 i_ehdrp = elf_elfheader (abfd);
11534
11535 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
11536 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
11537 else
11538 i_ehdrp->e_ident[EI_OSABI] = 0;
11539 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
11540
11541 if (link_info)
11542 {
11543 globals = elf32_arm_hash_table (link_info);
11544 if (globals->byteswap_code)
11545 i_ehdrp->e_flags |= EF_ARM_BE8;
11546 }
11547 }
11548
11549 static enum elf_reloc_type_class
11550 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
11551 {
11552 switch ((int) ELF32_R_TYPE (rela->r_info))
11553 {
11554 case R_ARM_RELATIVE:
11555 return reloc_class_relative;
11556 case R_ARM_JUMP_SLOT:
11557 return reloc_class_plt;
11558 case R_ARM_COPY:
11559 return reloc_class_copy;
11560 default:
11561 return reloc_class_normal;
11562 }
11563 }
11564
11565 /* Set the right machine number for an Arm ELF file. */
11566
11567 static bfd_boolean
11568 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
11569 {
11570 if (hdr->sh_type == SHT_NOTE)
11571 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
11572
11573 return TRUE;
11574 }
11575
11576 static void
11577 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
11578 {
11579 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
11580 }
11581
11582 /* Return TRUE if this is an unwinding table entry. */
11583
11584 static bfd_boolean
11585 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
11586 {
11587 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
11588 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
11589 }
11590
11591
11592 /* Set the type and flags for an ARM section. We do this by
11593 the section name, which is a hack, but ought to work. */
11594
11595 static bfd_boolean
11596 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
11597 {
11598 const char * name;
11599
11600 name = bfd_get_section_name (abfd, sec);
11601
11602 if (is_arm_elf_unwind_section_name (abfd, name))
11603 {
11604 hdr->sh_type = SHT_ARM_EXIDX;
11605 hdr->sh_flags |= SHF_LINK_ORDER;
11606 }
11607 return TRUE;
11608 }
11609
11610 /* Handle an ARM specific section when reading an object file. This is
11611 called when bfd_section_from_shdr finds a section with an unknown
11612 type. */
11613
11614 static bfd_boolean
11615 elf32_arm_section_from_shdr (bfd *abfd,
11616 Elf_Internal_Shdr * hdr,
11617 const char *name,
11618 int shindex)
11619 {
11620 /* There ought to be a place to keep ELF backend specific flags, but
11621 at the moment there isn't one. We just keep track of the
11622 sections by their name, instead. Fortunately, the ABI gives
11623 names for all the ARM specific sections, so we will probably get
11624 away with this. */
11625 switch (hdr->sh_type)
11626 {
11627 case SHT_ARM_EXIDX:
11628 case SHT_ARM_PREEMPTMAP:
11629 case SHT_ARM_ATTRIBUTES:
11630 break;
11631
11632 default:
11633 return FALSE;
11634 }
11635
11636 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
11637 return FALSE;
11638
11639 return TRUE;
11640 }
11641
11642 /* A structure used to record a list of sections, independently
11643 of the next and prev fields in the asection structure. */
11644 typedef struct section_list
11645 {
11646 asection * sec;
11647 struct section_list * next;
11648 struct section_list * prev;
11649 }
11650 section_list;
11651
11652 /* Unfortunately we need to keep a list of sections for which
11653 an _arm_elf_section_data structure has been allocated. This
11654 is because it is possible for functions like elf32_arm_write_section
11655 to be called on a section which has had an elf_data_structure
11656 allocated for it (and so the used_by_bfd field is valid) but
11657 for which the ARM extended version of this structure - the
11658 _arm_elf_section_data structure - has not been allocated. */
11659 static section_list * sections_with_arm_elf_section_data = NULL;
11660
11661 static void
11662 record_section_with_arm_elf_section_data (asection * sec)
11663 {
11664 struct section_list * entry;
11665
11666 entry = bfd_malloc (sizeof (* entry));
11667 if (entry == NULL)
11668 return;
11669 entry->sec = sec;
11670 entry->next = sections_with_arm_elf_section_data;
11671 entry->prev = NULL;
11672 if (entry->next != NULL)
11673 entry->next->prev = entry;
11674 sections_with_arm_elf_section_data = entry;
11675 }
11676
11677 static struct section_list *
11678 find_arm_elf_section_entry (asection * sec)
11679 {
11680 struct section_list * entry;
11681 static struct section_list * last_entry = NULL;
11682
11683 /* This is a short cut for the typical case where the sections are added
11684 to the sections_with_arm_elf_section_data list in forward order and
11685 then looked up here in backwards order. This makes a real difference
11686 to the ld-srec/sec64k.exp linker test. */
11687 entry = sections_with_arm_elf_section_data;
11688 if (last_entry != NULL)
11689 {
11690 if (last_entry->sec == sec)
11691 entry = last_entry;
11692 else if (last_entry->next != NULL
11693 && last_entry->next->sec == sec)
11694 entry = last_entry->next;
11695 }
11696
11697 for (; entry; entry = entry->next)
11698 if (entry->sec == sec)
11699 break;
11700
11701 if (entry)
11702 /* Record the entry prior to this one - it is the entry we are most
11703 likely to want to locate next time. Also this way if we have been
11704 called from unrecord_section_with_arm_elf_section_data() we will not
11705 be caching a pointer that is about to be freed. */
11706 last_entry = entry->prev;
11707
11708 return entry;
11709 }
11710
11711 static _arm_elf_section_data *
11712 get_arm_elf_section_data (asection * sec)
11713 {
11714 struct section_list * entry;
11715
11716 entry = find_arm_elf_section_entry (sec);
11717
11718 if (entry)
11719 return elf32_arm_section_data (entry->sec);
11720 else
11721 return NULL;
11722 }
11723
11724 static void
11725 unrecord_section_with_arm_elf_section_data (asection * sec)
11726 {
11727 struct section_list * entry;
11728
11729 entry = find_arm_elf_section_entry (sec);
11730
11731 if (entry)
11732 {
11733 if (entry->prev != NULL)
11734 entry->prev->next = entry->next;
11735 if (entry->next != NULL)
11736 entry->next->prev = entry->prev;
11737 if (entry == sections_with_arm_elf_section_data)
11738 sections_with_arm_elf_section_data = entry->next;
11739 free (entry);
11740 }
11741 }
11742
11743
11744 typedef struct
11745 {
11746 void *finfo;
11747 struct bfd_link_info *info;
11748 asection *sec;
11749 int sec_shndx;
11750 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
11751 asection *, struct elf_link_hash_entry *);
11752 } output_arch_syminfo;
11753
11754 enum map_symbol_type
11755 {
11756 ARM_MAP_ARM,
11757 ARM_MAP_THUMB,
11758 ARM_MAP_DATA
11759 };
11760
11761
11762 /* Output a single mapping symbol. */
11763
11764 static bfd_boolean
11765 elf32_arm_output_map_sym (output_arch_syminfo *osi,
11766 enum map_symbol_type type,
11767 bfd_vma offset)
11768 {
11769 static const char *names[3] = {"$a", "$t", "$d"};
11770 struct elf32_arm_link_hash_table *htab;
11771 Elf_Internal_Sym sym;
11772
11773 htab = elf32_arm_hash_table (osi->info);
11774 sym.st_value = osi->sec->output_section->vma
11775 + osi->sec->output_offset
11776 + offset;
11777 sym.st_size = 0;
11778 sym.st_other = 0;
11779 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
11780 sym.st_shndx = osi->sec_shndx;
11781 if (!osi->func (osi->finfo, names[type], &sym, osi->sec, NULL))
11782 return FALSE;
11783 return TRUE;
11784 }
11785
11786
11787 /* Output mapping symbols for PLT entries associated with H. */
11788
11789 static bfd_boolean
11790 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
11791 {
11792 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
11793 struct elf32_arm_link_hash_table *htab;
11794 struct elf32_arm_link_hash_entry *eh;
11795 bfd_vma addr;
11796
11797 htab = elf32_arm_hash_table (osi->info);
11798
11799 if (h->root.type == bfd_link_hash_indirect)
11800 return TRUE;
11801
11802 if (h->root.type == bfd_link_hash_warning)
11803 /* When warning symbols are created, they **replace** the "real"
11804 entry in the hash table, thus we never get to see the real
11805 symbol in a hash traversal. So look at it now. */
11806 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11807
11808 if (h->plt.offset == (bfd_vma) -1)
11809 return TRUE;
11810
11811 eh = (struct elf32_arm_link_hash_entry *) h;
11812 addr = h->plt.offset;
11813 if (htab->symbian_p)
11814 {
11815 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11816 return FALSE;
11817 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
11818 return FALSE;
11819 }
11820 else if (htab->vxworks_p)
11821 {
11822 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11823 return FALSE;
11824 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11825 return FALSE;
11826 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
11827 return FALSE;
11828 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
11829 return FALSE;
11830 }
11831 else
11832 {
11833 bfd_signed_vma thumb_refs;
11834
11835 thumb_refs = eh->plt_thumb_refcount;
11836 if (!htab->use_blx)
11837 thumb_refs += eh->plt_maybe_thumb_refcount;
11838
11839 if (thumb_refs > 0)
11840 {
11841 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
11842 return FALSE;
11843 }
11844 #ifdef FOUR_WORD_PLT
11845 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11846 return FALSE;
11847 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
11848 return FALSE;
11849 #else
11850 /* A three-word PLT with no Thumb thunk contains only Arm code,
11851 so only need to output a mapping symbol for the first PLT entry and
11852 entries with thumb thunks. */
11853 if (thumb_refs > 0 || addr == 20)
11854 {
11855 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11856 return FALSE;
11857 }
11858 #endif
11859 }
11860
11861 return TRUE;
11862 }
11863
11864 /* Output a single local symbol for a generated stub. */
11865
11866 static bfd_boolean
11867 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
11868 bfd_vma offset, bfd_vma size)
11869 {
11870 struct elf32_arm_link_hash_table *htab;
11871 Elf_Internal_Sym sym;
11872
11873 htab = elf32_arm_hash_table (osi->info);
11874 sym.st_value = osi->sec->output_section->vma
11875 + osi->sec->output_offset
11876 + offset;
11877 sym.st_size = size;
11878 sym.st_other = 0;
11879 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
11880 sym.st_shndx = osi->sec_shndx;
11881 if (!osi->func (osi->finfo, name, &sym, osi->sec, NULL))
11882 return FALSE;
11883 return TRUE;
11884 }
11885
11886 static bfd_boolean
11887 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
11888 void * in_arg)
11889 {
11890 struct elf32_arm_stub_hash_entry *stub_entry;
11891 struct bfd_link_info *info;
11892 struct elf32_arm_link_hash_table *htab;
11893 asection *stub_sec;
11894 bfd_vma addr;
11895 char *stub_name;
11896 output_arch_syminfo *osi;
11897 const insn_sequence *template;
11898 enum stub_insn_type prev_type;
11899 int size;
11900 int i;
11901 enum map_symbol_type sym_type;
11902
11903 /* Massage our args to the form they really have. */
11904 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
11905 osi = (output_arch_syminfo *) in_arg;
11906
11907 info = osi->info;
11908
11909 htab = elf32_arm_hash_table (info);
11910 stub_sec = stub_entry->stub_sec;
11911
11912 /* Ensure this stub is attached to the current section being
11913 processed. */
11914 if (stub_sec != osi->sec)
11915 return TRUE;
11916
11917 addr = (bfd_vma) stub_entry->stub_offset;
11918 stub_name = stub_entry->output_name;
11919
11920 template = stub_entry->stub_template;
11921 switch (template[0].type)
11922 {
11923 case ARM_TYPE:
11924 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, stub_entry->stub_size))
11925 return FALSE;
11926 break;
11927 case THUMB16_TYPE:
11928 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1,
11929 stub_entry->stub_size))
11930 return FALSE;
11931 break;
11932 default:
11933 BFD_FAIL ();
11934 return FALSE;
11935 }
11936
11937 prev_type = DATA_TYPE;
11938 size = 0;
11939 for (i = 0; i < stub_entry->stub_template_size; i++)
11940 {
11941 switch (template[i].type)
11942 {
11943 case ARM_TYPE:
11944 sym_type = ARM_MAP_ARM;
11945 break;
11946
11947 case THUMB16_TYPE:
11948 sym_type = ARM_MAP_THUMB;
11949 break;
11950
11951 case DATA_TYPE:
11952 sym_type = ARM_MAP_DATA;
11953 break;
11954
11955 default:
11956 BFD_FAIL ();
11957 return FALSE;
11958 }
11959
11960 if (template[i].type != prev_type)
11961 {
11962 prev_type = template[i].type;
11963 if (!elf32_arm_output_map_sym (osi, sym_type, addr + size))
11964 return FALSE;
11965 }
11966
11967 switch (template[i].type)
11968 {
11969 case ARM_TYPE:
11970 size += 4;
11971 break;
11972
11973 case THUMB16_TYPE:
11974 size += 2;
11975 break;
11976
11977 case DATA_TYPE:
11978 size += 4;
11979 break;
11980
11981 default:
11982 BFD_FAIL ();
11983 return FALSE;
11984 }
11985 }
11986
11987 return TRUE;
11988 }
11989
11990 /* Output mapping symbols for linker generated sections. */
11991
11992 static bfd_boolean
11993 elf32_arm_output_arch_local_syms (bfd *output_bfd,
11994 struct bfd_link_info *info,
11995 void *finfo,
11996 bfd_boolean (*func) (void *, const char *,
11997 Elf_Internal_Sym *,
11998 asection *,
11999 struct elf_link_hash_entry *))
12000 {
12001 output_arch_syminfo osi;
12002 struct elf32_arm_link_hash_table *htab;
12003 bfd_vma offset;
12004 bfd_size_type size;
12005
12006 htab = elf32_arm_hash_table (info);
12007 check_use_blx (htab);
12008
12009 osi.finfo = finfo;
12010 osi.info = info;
12011 osi.func = func;
12012
12013 /* ARM->Thumb glue. */
12014 if (htab->arm_glue_size > 0)
12015 {
12016 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
12017 ARM2THUMB_GLUE_SECTION_NAME);
12018
12019 osi.sec_shndx = _bfd_elf_section_from_bfd_section
12020 (output_bfd, osi.sec->output_section);
12021 if (info->shared || htab->root.is_relocatable_executable
12022 || htab->pic_veneer)
12023 size = ARM2THUMB_PIC_GLUE_SIZE;
12024 else if (htab->use_blx)
12025 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
12026 else
12027 size = ARM2THUMB_STATIC_GLUE_SIZE;
12028
12029 for (offset = 0; offset < htab->arm_glue_size; offset += size)
12030 {
12031 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
12032 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
12033 }
12034 }
12035
12036 /* Thumb->ARM glue. */
12037 if (htab->thumb_glue_size > 0)
12038 {
12039 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
12040 THUMB2ARM_GLUE_SECTION_NAME);
12041
12042 osi.sec_shndx = _bfd_elf_section_from_bfd_section
12043 (output_bfd, osi.sec->output_section);
12044 size = THUMB2ARM_GLUE_SIZE;
12045
12046 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
12047 {
12048 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
12049 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
12050 }
12051 }
12052
12053 /* ARMv4 BX veneers. */
12054 if (htab->bx_glue_size > 0)
12055 {
12056 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
12057 ARM_BX_GLUE_SECTION_NAME);
12058
12059 osi.sec_shndx = _bfd_elf_section_from_bfd_section
12060 (output_bfd, osi.sec->output_section);
12061
12062 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
12063 }
12064
12065 /* Long calls stubs. */
12066 if (htab->stub_bfd && htab->stub_bfd->sections)
12067 {
12068 asection* stub_sec;
12069
12070 for (stub_sec = htab->stub_bfd->sections;
12071 stub_sec != NULL;
12072 stub_sec = stub_sec->next)
12073 {
12074 /* Ignore non-stub sections. */
12075 if (!strstr (stub_sec->name, STUB_SUFFIX))
12076 continue;
12077
12078 osi.sec = stub_sec;
12079
12080 osi.sec_shndx = _bfd_elf_section_from_bfd_section
12081 (output_bfd, osi.sec->output_section);
12082
12083 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
12084 }
12085 }
12086
12087 /* Finally, output mapping symbols for the PLT. */
12088 if (!htab->splt || htab->splt->size == 0)
12089 return TRUE;
12090
12091 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
12092 htab->splt->output_section);
12093 osi.sec = htab->splt;
12094 /* Output mapping symbols for the plt header. SymbianOS does not have a
12095 plt header. */
12096 if (htab->vxworks_p)
12097 {
12098 /* VxWorks shared libraries have no PLT header. */
12099 if (!info->shared)
12100 {
12101 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
12102 return FALSE;
12103 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
12104 return FALSE;
12105 }
12106 }
12107 else if (!htab->symbian_p)
12108 {
12109 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
12110 return FALSE;
12111 #ifndef FOUR_WORD_PLT
12112 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
12113 return FALSE;
12114 #endif
12115 }
12116
12117 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
12118 return TRUE;
12119 }
12120
12121 /* Allocate target specific section data. */
12122
12123 static bfd_boolean
12124 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
12125 {
12126 if (!sec->used_by_bfd)
12127 {
12128 _arm_elf_section_data *sdata;
12129 bfd_size_type amt = sizeof (*sdata);
12130
12131 sdata = bfd_zalloc (abfd, amt);
12132 if (sdata == NULL)
12133 return FALSE;
12134 sec->used_by_bfd = sdata;
12135 }
12136
12137 record_section_with_arm_elf_section_data (sec);
12138
12139 return _bfd_elf_new_section_hook (abfd, sec);
12140 }
12141
12142
12143 /* Used to order a list of mapping symbols by address. */
12144
12145 static int
12146 elf32_arm_compare_mapping (const void * a, const void * b)
12147 {
12148 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
12149 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
12150
12151 if (amap->vma > bmap->vma)
12152 return 1;
12153 else if (amap->vma < bmap->vma)
12154 return -1;
12155 else if (amap->type > bmap->type)
12156 /* Ensure results do not depend on the host qsort for objects with
12157 multiple mapping symbols at the same address by sorting on type
12158 after vma. */
12159 return 1;
12160 else if (amap->type < bmap->type)
12161 return -1;
12162 else
12163 return 0;
12164 }
12165
12166
12167 /* Do code byteswapping. Return FALSE afterwards so that the section is
12168 written out as normal. */
12169
12170 static bfd_boolean
12171 elf32_arm_write_section (bfd *output_bfd,
12172 struct bfd_link_info *link_info,
12173 asection *sec,
12174 bfd_byte *contents)
12175 {
12176 int mapcount, errcount;
12177 _arm_elf_section_data *arm_data;
12178 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
12179 elf32_arm_section_map *map;
12180 elf32_vfp11_erratum_list *errnode;
12181 bfd_vma ptr;
12182 bfd_vma end;
12183 bfd_vma offset = sec->output_section->vma + sec->output_offset;
12184 bfd_byte tmp;
12185 int i;
12186
12187 /* If this section has not been allocated an _arm_elf_section_data
12188 structure then we cannot record anything. */
12189 arm_data = get_arm_elf_section_data (sec);
12190 if (arm_data == NULL)
12191 return FALSE;
12192
12193 mapcount = arm_data->mapcount;
12194 map = arm_data->map;
12195 errcount = arm_data->erratumcount;
12196
12197 if (errcount != 0)
12198 {
12199 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
12200
12201 for (errnode = arm_data->erratumlist; errnode != 0;
12202 errnode = errnode->next)
12203 {
12204 bfd_vma index = errnode->vma - offset;
12205
12206 switch (errnode->type)
12207 {
12208 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
12209 {
12210 bfd_vma branch_to_veneer;
12211 /* Original condition code of instruction, plus bit mask for
12212 ARM B instruction. */
12213 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
12214 | 0x0a000000;
12215
12216 /* The instruction is before the label. */
12217 index -= 4;
12218
12219 /* Above offset included in -4 below. */
12220 branch_to_veneer = errnode->u.b.veneer->vma
12221 - errnode->vma - 4;
12222
12223 if ((signed) branch_to_veneer < -(1 << 25)
12224 || (signed) branch_to_veneer >= (1 << 25))
12225 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
12226 "range"), output_bfd);
12227
12228 insn |= (branch_to_veneer >> 2) & 0xffffff;
12229 contents[endianflip ^ index] = insn & 0xff;
12230 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
12231 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
12232 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
12233 }
12234 break;
12235
12236 case VFP11_ERRATUM_ARM_VENEER:
12237 {
12238 bfd_vma branch_from_veneer;
12239 unsigned int insn;
12240
12241 /* Take size of veneer into account. */
12242 branch_from_veneer = errnode->u.v.branch->vma
12243 - errnode->vma - 12;
12244
12245 if ((signed) branch_from_veneer < -(1 << 25)
12246 || (signed) branch_from_veneer >= (1 << 25))
12247 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
12248 "range"), output_bfd);
12249
12250 /* Original instruction. */
12251 insn = errnode->u.v.branch->u.b.vfp_insn;
12252 contents[endianflip ^ index] = insn & 0xff;
12253 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
12254 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
12255 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
12256
12257 /* Branch back to insn after original insn. */
12258 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
12259 contents[endianflip ^ (index + 4)] = insn & 0xff;
12260 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
12261 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
12262 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
12263 }
12264 break;
12265
12266 default:
12267 abort ();
12268 }
12269 }
12270 }
12271
12272 if (mapcount == 0)
12273 return FALSE;
12274
12275 if (globals->byteswap_code)
12276 {
12277 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
12278
12279 ptr = map[0].vma;
12280 for (i = 0; i < mapcount; i++)
12281 {
12282 if (i == mapcount - 1)
12283 end = sec->size;
12284 else
12285 end = map[i + 1].vma;
12286
12287 switch (map[i].type)
12288 {
12289 case 'a':
12290 /* Byte swap code words. */
12291 while (ptr + 3 < end)
12292 {
12293 tmp = contents[ptr];
12294 contents[ptr] = contents[ptr + 3];
12295 contents[ptr + 3] = tmp;
12296 tmp = contents[ptr + 1];
12297 contents[ptr + 1] = contents[ptr + 2];
12298 contents[ptr + 2] = tmp;
12299 ptr += 4;
12300 }
12301 break;
12302
12303 case 't':
12304 /* Byte swap code halfwords. */
12305 while (ptr + 1 < end)
12306 {
12307 tmp = contents[ptr];
12308 contents[ptr] = contents[ptr + 1];
12309 contents[ptr + 1] = tmp;
12310 ptr += 2;
12311 }
12312 break;
12313
12314 case 'd':
12315 /* Leave data alone. */
12316 break;
12317 }
12318 ptr = end;
12319 }
12320 }
12321
12322 free (map);
12323 arm_data->mapcount = 0;
12324 arm_data->mapsize = 0;
12325 arm_data->map = NULL;
12326 unrecord_section_with_arm_elf_section_data (sec);
12327
12328 return FALSE;
12329 }
12330
12331 static void
12332 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
12333 asection * sec,
12334 void * ignore ATTRIBUTE_UNUSED)
12335 {
12336 unrecord_section_with_arm_elf_section_data (sec);
12337 }
12338
12339 static bfd_boolean
12340 elf32_arm_close_and_cleanup (bfd * abfd)
12341 {
12342 if (abfd->sections)
12343 bfd_map_over_sections (abfd,
12344 unrecord_section_via_map_over_sections,
12345 NULL);
12346
12347 return _bfd_elf_close_and_cleanup (abfd);
12348 }
12349
12350 static bfd_boolean
12351 elf32_arm_bfd_free_cached_info (bfd * abfd)
12352 {
12353 if (abfd->sections)
12354 bfd_map_over_sections (abfd,
12355 unrecord_section_via_map_over_sections,
12356 NULL);
12357
12358 return _bfd_free_cached_info (abfd);
12359 }
12360
12361 /* Display STT_ARM_TFUNC symbols as functions. */
12362
12363 static void
12364 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
12365 asymbol *asym)
12366 {
12367 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
12368
12369 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
12370 elfsym->symbol.flags |= BSF_FUNCTION;
12371 }
12372
12373
12374 /* Mangle thumb function symbols as we read them in. */
12375
12376 static bfd_boolean
12377 elf32_arm_swap_symbol_in (bfd * abfd,
12378 const void *psrc,
12379 const void *pshn,
12380 Elf_Internal_Sym *dst)
12381 {
12382 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
12383 return FALSE;
12384
12385 /* New EABI objects mark thumb function symbols by setting the low bit of
12386 the address. Turn these into STT_ARM_TFUNC. */
12387 if ((ELF_ST_TYPE (dst->st_info) == STT_FUNC)
12388 && (dst->st_value & 1))
12389 {
12390 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
12391 dst->st_value &= ~(bfd_vma) 1;
12392 }
12393 return TRUE;
12394 }
12395
12396
12397 /* Mangle thumb function symbols as we write them out. */
12398
12399 static void
12400 elf32_arm_swap_symbol_out (bfd *abfd,
12401 const Elf_Internal_Sym *src,
12402 void *cdst,
12403 void *shndx)
12404 {
12405 Elf_Internal_Sym newsym;
12406
12407 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
12408 of the address set, as per the new EABI. We do this unconditionally
12409 because objcopy does not set the elf header flags until after
12410 it writes out the symbol table. */
12411 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
12412 {
12413 newsym = *src;
12414 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
12415 if (newsym.st_shndx != SHN_UNDEF)
12416 {
12417 /* Do this only for defined symbols. At link type, the static
12418 linker will simulate the work of dynamic linker of resolving
12419 symbols and will carry over the thumbness of found symbols to
12420 the output symbol table. It's not clear how it happens, but
12421 the thumbness of undefined symbols can well be different at
12422 runtime, and writing '1' for them will be confusing for users
12423 and possibly for dynamic linker itself.
12424 */
12425 newsym.st_value |= 1;
12426 }
12427
12428 src = &newsym;
12429 }
12430 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
12431 }
12432
12433 /* Add the PT_ARM_EXIDX program header. */
12434
12435 static bfd_boolean
12436 elf32_arm_modify_segment_map (bfd *abfd,
12437 struct bfd_link_info *info ATTRIBUTE_UNUSED)
12438 {
12439 struct elf_segment_map *m;
12440 asection *sec;
12441
12442 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
12443 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
12444 {
12445 /* If there is already a PT_ARM_EXIDX header, then we do not
12446 want to add another one. This situation arises when running
12447 "strip"; the input binary already has the header. */
12448 m = elf_tdata (abfd)->segment_map;
12449 while (m && m->p_type != PT_ARM_EXIDX)
12450 m = m->next;
12451 if (!m)
12452 {
12453 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
12454 if (m == NULL)
12455 return FALSE;
12456 m->p_type = PT_ARM_EXIDX;
12457 m->count = 1;
12458 m->sections[0] = sec;
12459
12460 m->next = elf_tdata (abfd)->segment_map;
12461 elf_tdata (abfd)->segment_map = m;
12462 }
12463 }
12464
12465 return TRUE;
12466 }
12467
12468 /* We may add a PT_ARM_EXIDX program header. */
12469
12470 static int
12471 elf32_arm_additional_program_headers (bfd *abfd,
12472 struct bfd_link_info *info ATTRIBUTE_UNUSED)
12473 {
12474 asection *sec;
12475
12476 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
12477 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
12478 return 1;
12479 else
12480 return 0;
12481 }
12482
12483 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
12484
12485 static bfd_boolean
12486 elf32_arm_is_function_type (unsigned int type)
12487 {
12488 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
12489 }
12490
12491 /* We use this to override swap_symbol_in and swap_symbol_out. */
12492 const struct elf_size_info elf32_arm_size_info =
12493 {
12494 sizeof (Elf32_External_Ehdr),
12495 sizeof (Elf32_External_Phdr),
12496 sizeof (Elf32_External_Shdr),
12497 sizeof (Elf32_External_Rel),
12498 sizeof (Elf32_External_Rela),
12499 sizeof (Elf32_External_Sym),
12500 sizeof (Elf32_External_Dyn),
12501 sizeof (Elf_External_Note),
12502 4,
12503 1,
12504 32, 2,
12505 ELFCLASS32, EV_CURRENT,
12506 bfd_elf32_write_out_phdrs,
12507 bfd_elf32_write_shdrs_and_ehdr,
12508 bfd_elf32_checksum_contents,
12509 bfd_elf32_write_relocs,
12510 elf32_arm_swap_symbol_in,
12511 elf32_arm_swap_symbol_out,
12512 bfd_elf32_slurp_reloc_table,
12513 bfd_elf32_slurp_symbol_table,
12514 bfd_elf32_swap_dyn_in,
12515 bfd_elf32_swap_dyn_out,
12516 bfd_elf32_swap_reloc_in,
12517 bfd_elf32_swap_reloc_out,
12518 bfd_elf32_swap_reloca_in,
12519 bfd_elf32_swap_reloca_out
12520 };
12521
12522 #define ELF_ARCH bfd_arch_arm
12523 #define ELF_MACHINE_CODE EM_ARM
12524 #ifdef __QNXTARGET__
12525 #define ELF_MAXPAGESIZE 0x1000
12526 #else
12527 #define ELF_MAXPAGESIZE 0x8000
12528 #endif
12529 #define ELF_MINPAGESIZE 0x1000
12530 #define ELF_COMMONPAGESIZE 0x1000
12531
12532 #define bfd_elf32_mkobject elf32_arm_mkobject
12533
12534 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
12535 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
12536 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
12537 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
12538 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
12539 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
12540 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
12541 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
12542 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
12543 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
12544 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
12545 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
12546 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
12547 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
12548 #define bfd_elf32_bfd_final_link elf32_arm_final_link
12549
12550 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
12551 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
12552 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
12553 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
12554 #define elf_backend_check_relocs elf32_arm_check_relocs
12555 #define elf_backend_relocate_section elf32_arm_relocate_section
12556 #define elf_backend_write_section elf32_arm_write_section
12557 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
12558 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
12559 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
12560 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
12561 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
12562 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
12563 #define elf_backend_post_process_headers elf32_arm_post_process_headers
12564 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
12565 #define elf_backend_object_p elf32_arm_object_p
12566 #define elf_backend_section_flags elf32_arm_section_flags
12567 #define elf_backend_fake_sections elf32_arm_fake_sections
12568 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
12569 #define elf_backend_final_write_processing elf32_arm_final_write_processing
12570 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
12571 #define elf_backend_symbol_processing elf32_arm_symbol_processing
12572 #define elf_backend_size_info elf32_arm_size_info
12573 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
12574 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
12575 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
12576 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
12577 #define elf_backend_is_function_type elf32_arm_is_function_type
12578
12579 #define elf_backend_can_refcount 1
12580 #define elf_backend_can_gc_sections 1
12581 #define elf_backend_plt_readonly 1
12582 #define elf_backend_want_got_plt 1
12583 #define elf_backend_want_plt_sym 0
12584 #define elf_backend_may_use_rel_p 1
12585 #define elf_backend_may_use_rela_p 0
12586 #define elf_backend_default_use_rela_p 0
12587
12588 #define elf_backend_got_header_size 12
12589
12590 #undef elf_backend_obj_attrs_vendor
12591 #define elf_backend_obj_attrs_vendor "aeabi"
12592 #undef elf_backend_obj_attrs_section
12593 #define elf_backend_obj_attrs_section ".ARM.attributes"
12594 #undef elf_backend_obj_attrs_arg_type
12595 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
12596 #undef elf_backend_obj_attrs_section_type
12597 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
12598 #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
12599
12600 #include "elf32-target.h"
12601
12602 /* VxWorks Targets. */
12603
12604 #undef TARGET_LITTLE_SYM
12605 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
12606 #undef TARGET_LITTLE_NAME
12607 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
12608 #undef TARGET_BIG_SYM
12609 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
12610 #undef TARGET_BIG_NAME
12611 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
12612
12613 /* Like elf32_arm_link_hash_table_create -- but overrides
12614 appropriately for VxWorks. */
12615
12616 static struct bfd_link_hash_table *
12617 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
12618 {
12619 struct bfd_link_hash_table *ret;
12620
12621 ret = elf32_arm_link_hash_table_create (abfd);
12622 if (ret)
12623 {
12624 struct elf32_arm_link_hash_table *htab
12625 = (struct elf32_arm_link_hash_table *) ret;
12626 htab->use_rel = 0;
12627 htab->vxworks_p = 1;
12628 }
12629 return ret;
12630 }
12631
12632 static void
12633 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
12634 {
12635 elf32_arm_final_write_processing (abfd, linker);
12636 elf_vxworks_final_write_processing (abfd, linker);
12637 }
12638
12639 #undef elf32_bed
12640 #define elf32_bed elf32_arm_vxworks_bed
12641
12642 #undef bfd_elf32_bfd_link_hash_table_create
12643 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
12644 #undef elf_backend_add_symbol_hook
12645 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
12646 #undef elf_backend_final_write_processing
12647 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
12648 #undef elf_backend_emit_relocs
12649 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
12650
12651 #undef elf_backend_may_use_rel_p
12652 #define elf_backend_may_use_rel_p 0
12653 #undef elf_backend_may_use_rela_p
12654 #define elf_backend_may_use_rela_p 1
12655 #undef elf_backend_default_use_rela_p
12656 #define elf_backend_default_use_rela_p 1
12657 #undef elf_backend_want_plt_sym
12658 #define elf_backend_want_plt_sym 1
12659 #undef ELF_MAXPAGESIZE
12660 #define ELF_MAXPAGESIZE 0x1000
12661
12662 #include "elf32-target.h"
12663
12664
12665 /* Symbian OS Targets. */
12666
12667 #undef TARGET_LITTLE_SYM
12668 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
12669 #undef TARGET_LITTLE_NAME
12670 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
12671 #undef TARGET_BIG_SYM
12672 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
12673 #undef TARGET_BIG_NAME
12674 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
12675
12676 /* Like elf32_arm_link_hash_table_create -- but overrides
12677 appropriately for Symbian OS. */
12678
12679 static struct bfd_link_hash_table *
12680 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
12681 {
12682 struct bfd_link_hash_table *ret;
12683
12684 ret = elf32_arm_link_hash_table_create (abfd);
12685 if (ret)
12686 {
12687 struct elf32_arm_link_hash_table *htab
12688 = (struct elf32_arm_link_hash_table *)ret;
12689 /* There is no PLT header for Symbian OS. */
12690 htab->plt_header_size = 0;
12691 /* The PLT entries are each one instruction and one word. */
12692 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
12693 htab->symbian_p = 1;
12694 /* Symbian uses armv5t or above, so use_blx is always true. */
12695 htab->use_blx = 1;
12696 htab->root.is_relocatable_executable = 1;
12697 }
12698 return ret;
12699 }
12700
12701 static const struct bfd_elf_special_section
12702 elf32_arm_symbian_special_sections[] =
12703 {
12704 /* In a BPABI executable, the dynamic linking sections do not go in
12705 the loadable read-only segment. The post-linker may wish to
12706 refer to these sections, but they are not part of the final
12707 program image. */
12708 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
12709 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
12710 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
12711 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
12712 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
12713 /* These sections do not need to be writable as the SymbianOS
12714 postlinker will arrange things so that no dynamic relocation is
12715 required. */
12716 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
12717 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
12718 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
12719 { NULL, 0, 0, 0, 0 }
12720 };
12721
12722 static void
12723 elf32_arm_symbian_begin_write_processing (bfd *abfd,
12724 struct bfd_link_info *link_info)
12725 {
12726 /* BPABI objects are never loaded directly by an OS kernel; they are
12727 processed by a postlinker first, into an OS-specific format. If
12728 the D_PAGED bit is set on the file, BFD will align segments on
12729 page boundaries, so that an OS can directly map the file. With
12730 BPABI objects, that just results in wasted space. In addition,
12731 because we clear the D_PAGED bit, map_sections_to_segments will
12732 recognize that the program headers should not be mapped into any
12733 loadable segment. */
12734 abfd->flags &= ~D_PAGED;
12735 elf32_arm_begin_write_processing (abfd, link_info);
12736 }
12737
12738 static bfd_boolean
12739 elf32_arm_symbian_modify_segment_map (bfd *abfd,
12740 struct bfd_link_info *info)
12741 {
12742 struct elf_segment_map *m;
12743 asection *dynsec;
12744
12745 /* BPABI shared libraries and executables should have a PT_DYNAMIC
12746 segment. However, because the .dynamic section is not marked
12747 with SEC_LOAD, the generic ELF code will not create such a
12748 segment. */
12749 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
12750 if (dynsec)
12751 {
12752 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
12753 if (m->p_type == PT_DYNAMIC)
12754 break;
12755
12756 if (m == NULL)
12757 {
12758 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
12759 m->next = elf_tdata (abfd)->segment_map;
12760 elf_tdata (abfd)->segment_map = m;
12761 }
12762 }
12763
12764 /* Also call the generic arm routine. */
12765 return elf32_arm_modify_segment_map (abfd, info);
12766 }
12767
12768 /* Return address for Ith PLT stub in section PLT, for relocation REL
12769 or (bfd_vma) -1 if it should not be included. */
12770
12771 static bfd_vma
12772 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
12773 const arelent *rel ATTRIBUTE_UNUSED)
12774 {
12775 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
12776 }
12777
12778
12779 #undef elf32_bed
12780 #define elf32_bed elf32_arm_symbian_bed
12781
12782 /* The dynamic sections are not allocated on SymbianOS; the postlinker
12783 will process them and then discard them. */
12784 #undef ELF_DYNAMIC_SEC_FLAGS
12785 #define ELF_DYNAMIC_SEC_FLAGS \
12786 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
12787
12788 #undef elf_backend_add_symbol_hook
12789 #undef elf_backend_emit_relocs
12790
12791 #undef bfd_elf32_bfd_link_hash_table_create
12792 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
12793 #undef elf_backend_special_sections
12794 #define elf_backend_special_sections elf32_arm_symbian_special_sections
12795 #undef elf_backend_begin_write_processing
12796 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
12797 #undef elf_backend_final_write_processing
12798 #define elf_backend_final_write_processing elf32_arm_final_write_processing
12799
12800 #undef elf_backend_modify_segment_map
12801 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
12802
12803 /* There is no .got section for BPABI objects, and hence no header. */
12804 #undef elf_backend_got_header_size
12805 #define elf_backend_got_header_size 0
12806
12807 /* Similarly, there is no .got.plt section. */
12808 #undef elf_backend_want_got_plt
12809 #define elf_backend_want_got_plt 0
12810
12811 #undef elf_backend_plt_sym_val
12812 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
12813
12814 #undef elf_backend_may_use_rel_p
12815 #define elf_backend_may_use_rel_p 1
12816 #undef elf_backend_may_use_rela_p
12817 #define elf_backend_may_use_rela_p 0
12818 #undef elf_backend_default_use_rela_p
12819 #define elf_backend_default_use_rela_p 0
12820 #undef elf_backend_want_plt_sym
12821 #define elf_backend_want_plt_sym 0
12822 #undef ELF_MAXPAGESIZE
12823 #define ELF_MAXPAGESIZE 0x8000
12824
12825 #include "elf32-target.h"
GDB Binutils - Deliverables
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