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[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 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
65 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
66 in that slot. */
67
68 static reloc_howto_type elf32_arm_howto_table_1[] =
69 {
70 /* No relocation. */
71 HOWTO (R_ARM_NONE, /* type */
72 0, /* rightshift */
73 0, /* size (0 = byte, 1 = short, 2 = long) */
74 0, /* bitsize */
75 FALSE, /* pc_relative */
76 0, /* bitpos */
77 complain_overflow_dont,/* complain_on_overflow */
78 bfd_elf_generic_reloc, /* special_function */
79 "R_ARM_NONE", /* name */
80 FALSE, /* partial_inplace */
81 0, /* src_mask */
82 0, /* dst_mask */
83 FALSE), /* pcrel_offset */
84
85 HOWTO (R_ARM_PC24, /* type */
86 2, /* rightshift */
87 2, /* size (0 = byte, 1 = short, 2 = long) */
88 24, /* bitsize */
89 TRUE, /* pc_relative */
90 0, /* bitpos */
91 complain_overflow_signed,/* complain_on_overflow */
92 bfd_elf_generic_reloc, /* special_function */
93 "R_ARM_PC24", /* name */
94 FALSE, /* partial_inplace */
95 0x00ffffff, /* src_mask */
96 0x00ffffff, /* dst_mask */
97 TRUE), /* pcrel_offset */
98
99 /* 32 bit absolute */
100 HOWTO (R_ARM_ABS32, /* type */
101 0, /* rightshift */
102 2, /* size (0 = byte, 1 = short, 2 = long) */
103 32, /* bitsize */
104 FALSE, /* pc_relative */
105 0, /* bitpos */
106 complain_overflow_bitfield,/* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_ARM_ABS32", /* name */
109 FALSE, /* partial_inplace */
110 0xffffffff, /* src_mask */
111 0xffffffff, /* dst_mask */
112 FALSE), /* pcrel_offset */
113
114 /* standard 32bit pc-relative reloc */
115 HOWTO (R_ARM_REL32, /* type */
116 0, /* rightshift */
117 2, /* size (0 = byte, 1 = short, 2 = long) */
118 32, /* bitsize */
119 TRUE, /* pc_relative */
120 0, /* bitpos */
121 complain_overflow_bitfield,/* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_ARM_REL32", /* name */
124 FALSE, /* partial_inplace */
125 0xffffffff, /* src_mask */
126 0xffffffff, /* dst_mask */
127 TRUE), /* pcrel_offset */
128
129 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
130 HOWTO (R_ARM_LDR_PC_G0, /* type */
131 0, /* rightshift */
132 0, /* size (0 = byte, 1 = short, 2 = long) */
133 32, /* bitsize */
134 TRUE, /* pc_relative */
135 0, /* bitpos */
136 complain_overflow_dont,/* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_ARM_LDR_PC_G0", /* name */
139 FALSE, /* partial_inplace */
140 0xffffffff, /* src_mask */
141 0xffffffff, /* dst_mask */
142 TRUE), /* pcrel_offset */
143
144 /* 16 bit absolute */
145 HOWTO (R_ARM_ABS16, /* type */
146 0, /* rightshift */
147 1, /* size (0 = byte, 1 = short, 2 = long) */
148 16, /* bitsize */
149 FALSE, /* pc_relative */
150 0, /* bitpos */
151 complain_overflow_bitfield,/* complain_on_overflow */
152 bfd_elf_generic_reloc, /* special_function */
153 "R_ARM_ABS16", /* name */
154 FALSE, /* partial_inplace */
155 0x0000ffff, /* src_mask */
156 0x0000ffff, /* dst_mask */
157 FALSE), /* pcrel_offset */
158
159 /* 12 bit absolute */
160 HOWTO (R_ARM_ABS12, /* type */
161 0, /* rightshift */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
163 12, /* bitsize */
164 FALSE, /* pc_relative */
165 0, /* bitpos */
166 complain_overflow_bitfield,/* complain_on_overflow */
167 bfd_elf_generic_reloc, /* special_function */
168 "R_ARM_ABS12", /* name */
169 FALSE, /* partial_inplace */
170 0x00000fff, /* src_mask */
171 0x00000fff, /* dst_mask */
172 FALSE), /* pcrel_offset */
173
174 HOWTO (R_ARM_THM_ABS5, /* type */
175 6, /* rightshift */
176 1, /* size (0 = byte, 1 = short, 2 = long) */
177 5, /* bitsize */
178 FALSE, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_bitfield,/* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_ARM_THM_ABS5", /* name */
183 FALSE, /* partial_inplace */
184 0x000007e0, /* src_mask */
185 0x000007e0, /* dst_mask */
186 FALSE), /* pcrel_offset */
187
188 /* 8 bit absolute */
189 HOWTO (R_ARM_ABS8, /* type */
190 0, /* rightshift */
191 0, /* size (0 = byte, 1 = short, 2 = long) */
192 8, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_bitfield,/* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_ARM_ABS8", /* name */
198 FALSE, /* partial_inplace */
199 0x000000ff, /* src_mask */
200 0x000000ff, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203 HOWTO (R_ARM_SBREL32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont,/* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_ARM_SBREL32", /* name */
212 FALSE, /* partial_inplace */
213 0xffffffff, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 HOWTO (R_ARM_THM_CALL, /* type */
218 1, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 25, /* bitsize */
221 TRUE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_signed,/* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_ARM_THM_CALL", /* name */
226 FALSE, /* partial_inplace */
227 0x07ff07ff, /* src_mask */
228 0x07ff07ff, /* dst_mask */
229 TRUE), /* pcrel_offset */
230
231 HOWTO (R_ARM_THM_PC8, /* type */
232 1, /* rightshift */
233 1, /* size (0 = byte, 1 = short, 2 = long) */
234 8, /* bitsize */
235 TRUE, /* pc_relative */
236 0, /* bitpos */
237 complain_overflow_signed,/* complain_on_overflow */
238 bfd_elf_generic_reloc, /* special_function */
239 "R_ARM_THM_PC8", /* name */
240 FALSE, /* partial_inplace */
241 0x000000ff, /* src_mask */
242 0x000000ff, /* dst_mask */
243 TRUE), /* pcrel_offset */
244
245 HOWTO (R_ARM_BREL_ADJ, /* type */
246 1, /* rightshift */
247 1, /* size (0 = byte, 1 = short, 2 = long) */
248 32, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_signed,/* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_ARM_BREL_ADJ", /* name */
254 FALSE, /* partial_inplace */
255 0xffffffff, /* src_mask */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 HOWTO (R_ARM_SWI24, /* type */
260 0, /* rightshift */
261 0, /* size (0 = byte, 1 = short, 2 = long) */
262 0, /* bitsize */
263 FALSE, /* pc_relative */
264 0, /* bitpos */
265 complain_overflow_signed,/* complain_on_overflow */
266 bfd_elf_generic_reloc, /* special_function */
267 "R_ARM_SWI24", /* name */
268 FALSE, /* partial_inplace */
269 0x00000000, /* src_mask */
270 0x00000000, /* dst_mask */
271 FALSE), /* pcrel_offset */
272
273 HOWTO (R_ARM_THM_SWI8, /* type */
274 0, /* rightshift */
275 0, /* size (0 = byte, 1 = short, 2 = long) */
276 0, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_signed,/* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_ARM_SWI8", /* name */
282 FALSE, /* partial_inplace */
283 0x00000000, /* src_mask */
284 0x00000000, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* BLX instruction for the ARM. */
288 HOWTO (R_ARM_XPC25, /* type */
289 2, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 25, /* bitsize */
292 TRUE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_signed,/* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_ARM_XPC25", /* name */
297 FALSE, /* partial_inplace */
298 0x00ffffff, /* src_mask */
299 0x00ffffff, /* dst_mask */
300 TRUE), /* pcrel_offset */
301
302 /* BLX instruction for the Thumb. */
303 HOWTO (R_ARM_THM_XPC22, /* type */
304 2, /* rightshift */
305 2, /* size (0 = byte, 1 = short, 2 = long) */
306 22, /* bitsize */
307 TRUE, /* pc_relative */
308 0, /* bitpos */
309 complain_overflow_signed,/* complain_on_overflow */
310 bfd_elf_generic_reloc, /* special_function */
311 "R_ARM_THM_XPC22", /* name */
312 FALSE, /* partial_inplace */
313 0x07ff07ff, /* src_mask */
314 0x07ff07ff, /* dst_mask */
315 TRUE), /* pcrel_offset */
316
317 /* Dynamic TLS relocations. */
318
319 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
320 0, /* rightshift */
321 2, /* size (0 = byte, 1 = short, 2 = long) */
322 32, /* bitsize */
323 FALSE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield,/* complain_on_overflow */
326 bfd_elf_generic_reloc, /* special_function */
327 "R_ARM_TLS_DTPMOD32", /* name */
328 TRUE, /* partial_inplace */
329 0xffffffff, /* src_mask */
330 0xffffffff, /* dst_mask */
331 FALSE), /* pcrel_offset */
332
333 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 32, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield,/* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_ARM_TLS_DTPOFF32", /* name */
342 TRUE, /* partial_inplace */
343 0xffffffff, /* src_mask */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 HOWTO (R_ARM_TLS_TPOFF32, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 32, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield,/* complain_on_overflow */
354 bfd_elf_generic_reloc, /* special_function */
355 "R_ARM_TLS_TPOFF32", /* name */
356 TRUE, /* partial_inplace */
357 0xffffffff, /* src_mask */
358 0xffffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* Relocs used in ARM Linux */
362
363 HOWTO (R_ARM_COPY, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 32, /* bitsize */
367 FALSE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_bitfield,/* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_ARM_COPY", /* name */
372 TRUE, /* partial_inplace */
373 0xffffffff, /* src_mask */
374 0xffffffff, /* dst_mask */
375 FALSE), /* pcrel_offset */
376
377 HOWTO (R_ARM_GLOB_DAT, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 32, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_bitfield,/* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_ARM_GLOB_DAT", /* name */
386 TRUE, /* partial_inplace */
387 0xffffffff, /* src_mask */
388 0xffffffff, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 HOWTO (R_ARM_JUMP_SLOT, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 32, /* bitsize */
395 FALSE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_bitfield,/* complain_on_overflow */
398 bfd_elf_generic_reloc, /* special_function */
399 "R_ARM_JUMP_SLOT", /* name */
400 TRUE, /* partial_inplace */
401 0xffffffff, /* src_mask */
402 0xffffffff, /* dst_mask */
403 FALSE), /* pcrel_offset */
404
405 HOWTO (R_ARM_RELATIVE, /* type */
406 0, /* rightshift */
407 2, /* size (0 = byte, 1 = short, 2 = long) */
408 32, /* bitsize */
409 FALSE, /* pc_relative */
410 0, /* bitpos */
411 complain_overflow_bitfield,/* complain_on_overflow */
412 bfd_elf_generic_reloc, /* special_function */
413 "R_ARM_RELATIVE", /* name */
414 TRUE, /* partial_inplace */
415 0xffffffff, /* src_mask */
416 0xffffffff, /* dst_mask */
417 FALSE), /* pcrel_offset */
418
419 HOWTO (R_ARM_GOTOFF32, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 32, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_bitfield,/* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_ARM_GOTOFF32", /* name */
428 TRUE, /* partial_inplace */
429 0xffffffff, /* src_mask */
430 0xffffffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 HOWTO (R_ARM_GOTPC, /* type */
434 0, /* rightshift */
435 2, /* size (0 = byte, 1 = short, 2 = long) */
436 32, /* bitsize */
437 TRUE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield,/* complain_on_overflow */
440 bfd_elf_generic_reloc, /* special_function */
441 "R_ARM_GOTPC", /* name */
442 TRUE, /* partial_inplace */
443 0xffffffff, /* src_mask */
444 0xffffffff, /* dst_mask */
445 TRUE), /* pcrel_offset */
446
447 HOWTO (R_ARM_GOT32, /* type */
448 0, /* rightshift */
449 2, /* size (0 = byte, 1 = short, 2 = long) */
450 32, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_bitfield,/* complain_on_overflow */
454 bfd_elf_generic_reloc, /* special_function */
455 "R_ARM_GOT32", /* name */
456 TRUE, /* partial_inplace */
457 0xffffffff, /* src_mask */
458 0xffffffff, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 HOWTO (R_ARM_PLT32, /* type */
462 2, /* rightshift */
463 2, /* size (0 = byte, 1 = short, 2 = long) */
464 24, /* bitsize */
465 TRUE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_bitfield,/* complain_on_overflow */
468 bfd_elf_generic_reloc, /* special_function */
469 "R_ARM_PLT32", /* name */
470 FALSE, /* partial_inplace */
471 0x00ffffff, /* src_mask */
472 0x00ffffff, /* dst_mask */
473 TRUE), /* pcrel_offset */
474
475 HOWTO (R_ARM_CALL, /* type */
476 2, /* rightshift */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
478 24, /* bitsize */
479 TRUE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_signed,/* complain_on_overflow */
482 bfd_elf_generic_reloc, /* special_function */
483 "R_ARM_CALL", /* name */
484 FALSE, /* partial_inplace */
485 0x00ffffff, /* src_mask */
486 0x00ffffff, /* dst_mask */
487 TRUE), /* pcrel_offset */
488
489 HOWTO (R_ARM_JUMP24, /* type */
490 2, /* rightshift */
491 2, /* size (0 = byte, 1 = short, 2 = long) */
492 24, /* bitsize */
493 TRUE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_signed,/* complain_on_overflow */
496 bfd_elf_generic_reloc, /* special_function */
497 "R_ARM_JUMP24", /* name */
498 FALSE, /* partial_inplace */
499 0x00ffffff, /* src_mask */
500 0x00ffffff, /* dst_mask */
501 TRUE), /* pcrel_offset */
502
503 HOWTO (R_ARM_THM_JUMP24, /* type */
504 1, /* rightshift */
505 2, /* size (0 = byte, 1 = short, 2 = long) */
506 24, /* bitsize */
507 TRUE, /* pc_relative */
508 0, /* bitpos */
509 complain_overflow_signed,/* complain_on_overflow */
510 bfd_elf_generic_reloc, /* special_function */
511 "R_ARM_THM_JUMP24", /* name */
512 FALSE, /* partial_inplace */
513 0x07ff2fff, /* src_mask */
514 0x07ff2fff, /* dst_mask */
515 TRUE), /* pcrel_offset */
516
517 HOWTO (R_ARM_BASE_ABS, /* type */
518 0, /* rightshift */
519 2, /* size (0 = byte, 1 = short, 2 = long) */
520 32, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_dont,/* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 "R_ARM_BASE_ABS", /* name */
526 FALSE, /* partial_inplace */
527 0xffffffff, /* src_mask */
528 0xffffffff, /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
532 0, /* rightshift */
533 2, /* size (0 = byte, 1 = short, 2 = long) */
534 12, /* bitsize */
535 TRUE, /* pc_relative */
536 0, /* bitpos */
537 complain_overflow_dont,/* complain_on_overflow */
538 bfd_elf_generic_reloc, /* special_function */
539 "R_ARM_ALU_PCREL_7_0", /* name */
540 FALSE, /* partial_inplace */
541 0x00000fff, /* src_mask */
542 0x00000fff, /* dst_mask */
543 TRUE), /* pcrel_offset */
544
545 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
546 0, /* rightshift */
547 2, /* size (0 = byte, 1 = short, 2 = long) */
548 12, /* bitsize */
549 TRUE, /* pc_relative */
550 8, /* bitpos */
551 complain_overflow_dont,/* complain_on_overflow */
552 bfd_elf_generic_reloc, /* special_function */
553 "R_ARM_ALU_PCREL_15_8",/* name */
554 FALSE, /* partial_inplace */
555 0x00000fff, /* src_mask */
556 0x00000fff, /* dst_mask */
557 TRUE), /* pcrel_offset */
558
559 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
560 0, /* rightshift */
561 2, /* size (0 = byte, 1 = short, 2 = long) */
562 12, /* bitsize */
563 TRUE, /* pc_relative */
564 16, /* bitpos */
565 complain_overflow_dont,/* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_ARM_ALU_PCREL_23_15",/* name */
568 FALSE, /* partial_inplace */
569 0x00000fff, /* src_mask */
570 0x00000fff, /* dst_mask */
571 TRUE), /* pcrel_offset */
572
573 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 12, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont,/* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_ARM_LDR_SBREL_11_0",/* name */
582 FALSE, /* partial_inplace */
583 0x00000fff, /* src_mask */
584 0x00000fff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
588 0, /* rightshift */
589 2, /* size (0 = byte, 1 = short, 2 = long) */
590 8, /* bitsize */
591 FALSE, /* pc_relative */
592 12, /* bitpos */
593 complain_overflow_dont,/* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_ARM_ALU_SBREL_19_12",/* name */
596 FALSE, /* partial_inplace */
597 0x000ff000, /* src_mask */
598 0x000ff000, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 8, /* bitsize */
605 FALSE, /* pc_relative */
606 20, /* bitpos */
607 complain_overflow_dont,/* complain_on_overflow */
608 bfd_elf_generic_reloc, /* special_function */
609 "R_ARM_ALU_SBREL_27_20",/* name */
610 FALSE, /* partial_inplace */
611 0x0ff00000, /* src_mask */
612 0x0ff00000, /* dst_mask */
613 FALSE), /* pcrel_offset */
614
615 HOWTO (R_ARM_TARGET1, /* type */
616 0, /* rightshift */
617 2, /* size (0 = byte, 1 = short, 2 = long) */
618 32, /* bitsize */
619 FALSE, /* pc_relative */
620 0, /* bitpos */
621 complain_overflow_dont,/* complain_on_overflow */
622 bfd_elf_generic_reloc, /* special_function */
623 "R_ARM_TARGET1", /* name */
624 FALSE, /* partial_inplace */
625 0xffffffff, /* src_mask */
626 0xffffffff, /* dst_mask */
627 FALSE), /* pcrel_offset */
628
629 HOWTO (R_ARM_ROSEGREL32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_dont,/* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 "R_ARM_ROSEGREL32", /* name */
638 FALSE, /* partial_inplace */
639 0xffffffff, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 HOWTO (R_ARM_V4BX, /* type */
644 0, /* rightshift */
645 2, /* size (0 = byte, 1 = short, 2 = long) */
646 32, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_dont,/* complain_on_overflow */
650 bfd_elf_generic_reloc, /* special_function */
651 "R_ARM_V4BX", /* name */
652 FALSE, /* partial_inplace */
653 0xffffffff, /* src_mask */
654 0xffffffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 HOWTO (R_ARM_TARGET2, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 FALSE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed,/* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_ARM_TARGET2", /* name */
666 FALSE, /* partial_inplace */
667 0xffffffff, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 HOWTO (R_ARM_PREL31, /* type */
672 0, /* rightshift */
673 2, /* size (0 = byte, 1 = short, 2 = long) */
674 31, /* bitsize */
675 TRUE, /* pc_relative */
676 0, /* bitpos */
677 complain_overflow_signed,/* complain_on_overflow */
678 bfd_elf_generic_reloc, /* special_function */
679 "R_ARM_PREL31", /* name */
680 FALSE, /* partial_inplace */
681 0x7fffffff, /* src_mask */
682 0x7fffffff, /* dst_mask */
683 TRUE), /* pcrel_offset */
684
685 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
686 0, /* rightshift */
687 2, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_dont,/* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 "R_ARM_MOVW_ABS_NC", /* name */
694 FALSE, /* partial_inplace */
695 0x000f0fff, /* src_mask */
696 0x000f0fff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 HOWTO (R_ARM_MOVT_ABS, /* type */
700 0, /* rightshift */
701 2, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_bitfield,/* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_ARM_MOVT_ABS", /* name */
708 FALSE, /* partial_inplace */
709 0x000f0fff, /* src_mask */
710 0x000f0fff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
714 0, /* rightshift */
715 2, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 TRUE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont,/* complain_on_overflow */
720 bfd_elf_generic_reloc, /* special_function */
721 "R_ARM_MOVW_PREL_NC", /* name */
722 FALSE, /* partial_inplace */
723 0x000f0fff, /* src_mask */
724 0x000f0fff, /* dst_mask */
725 TRUE), /* pcrel_offset */
726
727 HOWTO (R_ARM_MOVT_PREL, /* type */
728 0, /* rightshift */
729 2, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 TRUE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield,/* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_ARM_MOVT_PREL", /* name */
736 FALSE, /* partial_inplace */
737 0x000f0fff, /* src_mask */
738 0x000f0fff, /* dst_mask */
739 TRUE), /* pcrel_offset */
740
741 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
742 0, /* rightshift */
743 2, /* size (0 = byte, 1 = short, 2 = long) */
744 16, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont,/* complain_on_overflow */
748 bfd_elf_generic_reloc, /* special_function */
749 "R_ARM_THM_MOVW_ABS_NC",/* name */
750 FALSE, /* partial_inplace */
751 0x040f70ff, /* src_mask */
752 0x040f70ff, /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
756 0, /* rightshift */
757 2, /* size (0 = byte, 1 = short, 2 = long) */
758 16, /* bitsize */
759 FALSE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_bitfield,/* complain_on_overflow */
762 bfd_elf_generic_reloc, /* special_function */
763 "R_ARM_THM_MOVT_ABS", /* name */
764 FALSE, /* partial_inplace */
765 0x040f70ff, /* src_mask */
766 0x040f70ff, /* dst_mask */
767 FALSE), /* pcrel_offset */
768
769 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
770 0, /* rightshift */
771 2, /* size (0 = byte, 1 = short, 2 = long) */
772 16, /* bitsize */
773 TRUE, /* pc_relative */
774 0, /* bitpos */
775 complain_overflow_dont,/* complain_on_overflow */
776 bfd_elf_generic_reloc, /* special_function */
777 "R_ARM_THM_MOVW_PREL_NC",/* name */
778 FALSE, /* partial_inplace */
779 0x040f70ff, /* src_mask */
780 0x040f70ff, /* dst_mask */
781 TRUE), /* pcrel_offset */
782
783 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
784 0, /* rightshift */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
786 16, /* bitsize */
787 TRUE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_bitfield,/* complain_on_overflow */
790 bfd_elf_generic_reloc, /* special_function */
791 "R_ARM_THM_MOVT_PREL", /* name */
792 FALSE, /* partial_inplace */
793 0x040f70ff, /* src_mask */
794 0x040f70ff, /* dst_mask */
795 TRUE), /* pcrel_offset */
796
797 HOWTO (R_ARM_THM_JUMP19, /* type */
798 1, /* rightshift */
799 2, /* size (0 = byte, 1 = short, 2 = long) */
800 19, /* bitsize */
801 TRUE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed,/* complain_on_overflow */
804 bfd_elf_generic_reloc, /* special_function */
805 "R_ARM_THM_JUMP19", /* name */
806 FALSE, /* partial_inplace */
807 0x043f2fff, /* src_mask */
808 0x043f2fff, /* dst_mask */
809 TRUE), /* pcrel_offset */
810
811 HOWTO (R_ARM_THM_JUMP6, /* type */
812 1, /* rightshift */
813 1, /* size (0 = byte, 1 = short, 2 = long) */
814 6, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_unsigned,/* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_ARM_THM_JUMP6", /* name */
820 FALSE, /* partial_inplace */
821 0x02f8, /* src_mask */
822 0x02f8, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* These are declared as 13-bit signed relocations because we can
826 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
827 versa. */
828 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
829 0, /* rightshift */
830 2, /* size (0 = byte, 1 = short, 2 = long) */
831 13, /* bitsize */
832 TRUE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont,/* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_ARM_THM_ALU_PREL_11_0",/* name */
837 FALSE, /* partial_inplace */
838 0xffffffff, /* src_mask */
839 0xffffffff, /* dst_mask */
840 TRUE), /* pcrel_offset */
841
842 HOWTO (R_ARM_THM_PC12, /* type */
843 0, /* rightshift */
844 2, /* size (0 = byte, 1 = short, 2 = long) */
845 13, /* bitsize */
846 TRUE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont,/* complain_on_overflow */
849 bfd_elf_generic_reloc, /* special_function */
850 "R_ARM_THM_PC12", /* name */
851 FALSE, /* partial_inplace */
852 0xffffffff, /* src_mask */
853 0xffffffff, /* dst_mask */
854 TRUE), /* pcrel_offset */
855
856 HOWTO (R_ARM_ABS32_NOI, /* type */
857 0, /* rightshift */
858 2, /* size (0 = byte, 1 = short, 2 = long) */
859 32, /* bitsize */
860 FALSE, /* pc_relative */
861 0, /* bitpos */
862 complain_overflow_dont,/* complain_on_overflow */
863 bfd_elf_generic_reloc, /* special_function */
864 "R_ARM_ABS32_NOI", /* name */
865 FALSE, /* partial_inplace */
866 0xffffffff, /* src_mask */
867 0xffffffff, /* dst_mask */
868 FALSE), /* pcrel_offset */
869
870 HOWTO (R_ARM_REL32_NOI, /* type */
871 0, /* rightshift */
872 2, /* size (0 = byte, 1 = short, 2 = long) */
873 32, /* bitsize */
874 TRUE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_dont,/* complain_on_overflow */
877 bfd_elf_generic_reloc, /* special_function */
878 "R_ARM_REL32_NOI", /* name */
879 FALSE, /* partial_inplace */
880 0xffffffff, /* src_mask */
881 0xffffffff, /* dst_mask */
882 FALSE), /* pcrel_offset */
883
884 /* Group relocations. */
885
886 HOWTO (R_ARM_ALU_PC_G0_NC, /* type */
887 0, /* rightshift */
888 2, /* size (0 = byte, 1 = short, 2 = long) */
889 32, /* bitsize */
890 TRUE, /* pc_relative */
891 0, /* bitpos */
892 complain_overflow_dont,/* complain_on_overflow */
893 bfd_elf_generic_reloc, /* special_function */
894 "R_ARM_ALU_PC_G0_NC", /* name */
895 FALSE, /* partial_inplace */
896 0xffffffff, /* src_mask */
897 0xffffffff, /* dst_mask */
898 TRUE), /* pcrel_offset */
899
900 HOWTO (R_ARM_ALU_PC_G0, /* type */
901 0, /* rightshift */
902 2, /* size (0 = byte, 1 = short, 2 = long) */
903 32, /* bitsize */
904 TRUE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont,/* complain_on_overflow */
907 bfd_elf_generic_reloc, /* special_function */
908 "R_ARM_ALU_PC_G0", /* name */
909 FALSE, /* partial_inplace */
910 0xffffffff, /* src_mask */
911 0xffffffff, /* dst_mask */
912 TRUE), /* pcrel_offset */
913
914 HOWTO (R_ARM_ALU_PC_G1_NC, /* type */
915 0, /* rightshift */
916 2, /* size (0 = byte, 1 = short, 2 = long) */
917 32, /* bitsize */
918 TRUE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont,/* complain_on_overflow */
921 bfd_elf_generic_reloc, /* special_function */
922 "R_ARM_ALU_PC_G1_NC", /* name */
923 FALSE, /* partial_inplace */
924 0xffffffff, /* src_mask */
925 0xffffffff, /* dst_mask */
926 TRUE), /* pcrel_offset */
927
928 HOWTO (R_ARM_ALU_PC_G1, /* type */
929 0, /* rightshift */
930 2, /* size (0 = byte, 1 = short, 2 = long) */
931 32, /* bitsize */
932 TRUE, /* pc_relative */
933 0, /* bitpos */
934 complain_overflow_dont,/* complain_on_overflow */
935 bfd_elf_generic_reloc, /* special_function */
936 "R_ARM_ALU_PC_G1", /* name */
937 FALSE, /* partial_inplace */
938 0xffffffff, /* src_mask */
939 0xffffffff, /* dst_mask */
940 TRUE), /* pcrel_offset */
941
942 HOWTO (R_ARM_ALU_PC_G2, /* type */
943 0, /* rightshift */
944 2, /* size (0 = byte, 1 = short, 2 = long) */
945 32, /* bitsize */
946 TRUE, /* pc_relative */
947 0, /* bitpos */
948 complain_overflow_dont,/* complain_on_overflow */
949 bfd_elf_generic_reloc, /* special_function */
950 "R_ARM_ALU_PC_G2", /* name */
951 FALSE, /* partial_inplace */
952 0xffffffff, /* src_mask */
953 0xffffffff, /* dst_mask */
954 TRUE), /* pcrel_offset */
955
956 HOWTO (R_ARM_LDR_PC_G1, /* type */
957 0, /* rightshift */
958 2, /* size (0 = byte, 1 = short, 2 = long) */
959 32, /* bitsize */
960 TRUE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont,/* complain_on_overflow */
963 bfd_elf_generic_reloc, /* special_function */
964 "R_ARM_LDR_PC_G1", /* name */
965 FALSE, /* partial_inplace */
966 0xffffffff, /* src_mask */
967 0xffffffff, /* dst_mask */
968 TRUE), /* pcrel_offset */
969
970 HOWTO (R_ARM_LDR_PC_G2, /* type */
971 0, /* rightshift */
972 2, /* size (0 = byte, 1 = short, 2 = long) */
973 32, /* bitsize */
974 TRUE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont,/* complain_on_overflow */
977 bfd_elf_generic_reloc, /* special_function */
978 "R_ARM_LDR_PC_G2", /* name */
979 FALSE, /* partial_inplace */
980 0xffffffff, /* src_mask */
981 0xffffffff, /* dst_mask */
982 TRUE), /* pcrel_offset */
983
984 HOWTO (R_ARM_LDRS_PC_G0, /* type */
985 0, /* rightshift */
986 2, /* size (0 = byte, 1 = short, 2 = long) */
987 32, /* bitsize */
988 TRUE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_dont,/* complain_on_overflow */
991 bfd_elf_generic_reloc, /* special_function */
992 "R_ARM_LDRS_PC_G0", /* name */
993 FALSE, /* partial_inplace */
994 0xffffffff, /* src_mask */
995 0xffffffff, /* dst_mask */
996 TRUE), /* pcrel_offset */
997
998 HOWTO (R_ARM_LDRS_PC_G1, /* type */
999 0, /* rightshift */
1000 2, /* size (0 = byte, 1 = short, 2 = long) */
1001 32, /* bitsize */
1002 TRUE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_dont,/* complain_on_overflow */
1005 bfd_elf_generic_reloc, /* special_function */
1006 "R_ARM_LDRS_PC_G1", /* name */
1007 FALSE, /* partial_inplace */
1008 0xffffffff, /* src_mask */
1009 0xffffffff, /* dst_mask */
1010 TRUE), /* pcrel_offset */
1011
1012 HOWTO (R_ARM_LDRS_PC_G2, /* type */
1013 0, /* rightshift */
1014 2, /* size (0 = byte, 1 = short, 2 = long) */
1015 32, /* bitsize */
1016 TRUE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont,/* complain_on_overflow */
1019 bfd_elf_generic_reloc, /* special_function */
1020 "R_ARM_LDRS_PC_G2", /* name */
1021 FALSE, /* partial_inplace */
1022 0xffffffff, /* src_mask */
1023 0xffffffff, /* dst_mask */
1024 TRUE), /* pcrel_offset */
1025
1026 HOWTO (R_ARM_LDC_PC_G0, /* type */
1027 0, /* rightshift */
1028 2, /* size (0 = byte, 1 = short, 2 = long) */
1029 32, /* bitsize */
1030 TRUE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont,/* complain_on_overflow */
1033 bfd_elf_generic_reloc, /* special_function */
1034 "R_ARM_LDC_PC_G0", /* name */
1035 FALSE, /* partial_inplace */
1036 0xffffffff, /* src_mask */
1037 0xffffffff, /* dst_mask */
1038 TRUE), /* pcrel_offset */
1039
1040 HOWTO (R_ARM_LDC_PC_G1, /* type */
1041 0, /* rightshift */
1042 2, /* size (0 = byte, 1 = short, 2 = long) */
1043 32, /* bitsize */
1044 TRUE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont,/* complain_on_overflow */
1047 bfd_elf_generic_reloc, /* special_function */
1048 "R_ARM_LDC_PC_G1", /* name */
1049 FALSE, /* partial_inplace */
1050 0xffffffff, /* src_mask */
1051 0xffffffff, /* dst_mask */
1052 TRUE), /* pcrel_offset */
1053
1054 HOWTO (R_ARM_LDC_PC_G2, /* type */
1055 0, /* rightshift */
1056 2, /* size (0 = byte, 1 = short, 2 = long) */
1057 32, /* bitsize */
1058 TRUE, /* pc_relative */
1059 0, /* bitpos */
1060 complain_overflow_dont,/* complain_on_overflow */
1061 bfd_elf_generic_reloc, /* special_function */
1062 "R_ARM_LDC_PC_G2", /* name */
1063 FALSE, /* partial_inplace */
1064 0xffffffff, /* src_mask */
1065 0xffffffff, /* dst_mask */
1066 TRUE), /* pcrel_offset */
1067
1068 HOWTO (R_ARM_ALU_SB_G0_NC, /* type */
1069 0, /* rightshift */
1070 2, /* size (0 = byte, 1 = short, 2 = long) */
1071 32, /* bitsize */
1072 TRUE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_dont,/* complain_on_overflow */
1075 bfd_elf_generic_reloc, /* special_function */
1076 "R_ARM_ALU_SB_G0_NC", /* name */
1077 FALSE, /* partial_inplace */
1078 0xffffffff, /* src_mask */
1079 0xffffffff, /* dst_mask */
1080 TRUE), /* pcrel_offset */
1081
1082 HOWTO (R_ARM_ALU_SB_G0, /* type */
1083 0, /* rightshift */
1084 2, /* size (0 = byte, 1 = short, 2 = long) */
1085 32, /* bitsize */
1086 TRUE, /* pc_relative */
1087 0, /* bitpos */
1088 complain_overflow_dont,/* complain_on_overflow */
1089 bfd_elf_generic_reloc, /* special_function */
1090 "R_ARM_ALU_SB_G0", /* name */
1091 FALSE, /* partial_inplace */
1092 0xffffffff, /* src_mask */
1093 0xffffffff, /* dst_mask */
1094 TRUE), /* pcrel_offset */
1095
1096 HOWTO (R_ARM_ALU_SB_G1_NC, /* type */
1097 0, /* rightshift */
1098 2, /* size (0 = byte, 1 = short, 2 = long) */
1099 32, /* bitsize */
1100 TRUE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_dont,/* complain_on_overflow */
1103 bfd_elf_generic_reloc, /* special_function */
1104 "R_ARM_ALU_SB_G1_NC", /* name */
1105 FALSE, /* partial_inplace */
1106 0xffffffff, /* src_mask */
1107 0xffffffff, /* dst_mask */
1108 TRUE), /* pcrel_offset */
1109
1110 HOWTO (R_ARM_ALU_SB_G1, /* type */
1111 0, /* rightshift */
1112 2, /* size (0 = byte, 1 = short, 2 = long) */
1113 32, /* bitsize */
1114 TRUE, /* pc_relative */
1115 0, /* bitpos */
1116 complain_overflow_dont,/* complain_on_overflow */
1117 bfd_elf_generic_reloc, /* special_function */
1118 "R_ARM_ALU_SB_G1", /* name */
1119 FALSE, /* partial_inplace */
1120 0xffffffff, /* src_mask */
1121 0xffffffff, /* dst_mask */
1122 TRUE), /* pcrel_offset */
1123
1124 HOWTO (R_ARM_ALU_SB_G2, /* type */
1125 0, /* rightshift */
1126 2, /* size (0 = byte, 1 = short, 2 = long) */
1127 32, /* bitsize */
1128 TRUE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont,/* complain_on_overflow */
1131 bfd_elf_generic_reloc, /* special_function */
1132 "R_ARM_ALU_SB_G2", /* name */
1133 FALSE, /* partial_inplace */
1134 0xffffffff, /* src_mask */
1135 0xffffffff, /* dst_mask */
1136 TRUE), /* pcrel_offset */
1137
1138 HOWTO (R_ARM_LDR_SB_G0, /* type */
1139 0, /* rightshift */
1140 2, /* size (0 = byte, 1 = short, 2 = long) */
1141 32, /* bitsize */
1142 TRUE, /* pc_relative */
1143 0, /* bitpos */
1144 complain_overflow_dont,/* complain_on_overflow */
1145 bfd_elf_generic_reloc, /* special_function */
1146 "R_ARM_LDR_SB_G0", /* name */
1147 FALSE, /* partial_inplace */
1148 0xffffffff, /* src_mask */
1149 0xffffffff, /* dst_mask */
1150 TRUE), /* pcrel_offset */
1151
1152 HOWTO (R_ARM_LDR_SB_G1, /* type */
1153 0, /* rightshift */
1154 2, /* size (0 = byte, 1 = short, 2 = long) */
1155 32, /* bitsize */
1156 TRUE, /* pc_relative */
1157 0, /* bitpos */
1158 complain_overflow_dont,/* complain_on_overflow */
1159 bfd_elf_generic_reloc, /* special_function */
1160 "R_ARM_LDR_SB_G1", /* name */
1161 FALSE, /* partial_inplace */
1162 0xffffffff, /* src_mask */
1163 0xffffffff, /* dst_mask */
1164 TRUE), /* pcrel_offset */
1165
1166 HOWTO (R_ARM_LDR_SB_G2, /* type */
1167 0, /* rightshift */
1168 2, /* size (0 = byte, 1 = short, 2 = long) */
1169 32, /* bitsize */
1170 TRUE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont,/* complain_on_overflow */
1173 bfd_elf_generic_reloc, /* special_function */
1174 "R_ARM_LDR_SB_G2", /* name */
1175 FALSE, /* partial_inplace */
1176 0xffffffff, /* src_mask */
1177 0xffffffff, /* dst_mask */
1178 TRUE), /* pcrel_offset */
1179
1180 HOWTO (R_ARM_LDRS_SB_G0, /* type */
1181 0, /* rightshift */
1182 2, /* size (0 = byte, 1 = short, 2 = long) */
1183 32, /* bitsize */
1184 TRUE, /* pc_relative */
1185 0, /* bitpos */
1186 complain_overflow_dont,/* complain_on_overflow */
1187 bfd_elf_generic_reloc, /* special_function */
1188 "R_ARM_LDRS_SB_G0", /* name */
1189 FALSE, /* partial_inplace */
1190 0xffffffff, /* src_mask */
1191 0xffffffff, /* dst_mask */
1192 TRUE), /* pcrel_offset */
1193
1194 HOWTO (R_ARM_LDRS_SB_G1, /* type */
1195 0, /* rightshift */
1196 2, /* size (0 = byte, 1 = short, 2 = long) */
1197 32, /* bitsize */
1198 TRUE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont,/* complain_on_overflow */
1201 bfd_elf_generic_reloc, /* special_function */
1202 "R_ARM_LDRS_SB_G1", /* name */
1203 FALSE, /* partial_inplace */
1204 0xffffffff, /* src_mask */
1205 0xffffffff, /* dst_mask */
1206 TRUE), /* pcrel_offset */
1207
1208 HOWTO (R_ARM_LDRS_SB_G2, /* type */
1209 0, /* rightshift */
1210 2, /* size (0 = byte, 1 = short, 2 = long) */
1211 32, /* bitsize */
1212 TRUE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_dont,/* complain_on_overflow */
1215 bfd_elf_generic_reloc, /* special_function */
1216 "R_ARM_LDRS_SB_G2", /* name */
1217 FALSE, /* partial_inplace */
1218 0xffffffff, /* src_mask */
1219 0xffffffff, /* dst_mask */
1220 TRUE), /* pcrel_offset */
1221
1222 HOWTO (R_ARM_LDC_SB_G0, /* type */
1223 0, /* rightshift */
1224 2, /* size (0 = byte, 1 = short, 2 = long) */
1225 32, /* bitsize */
1226 TRUE, /* pc_relative */
1227 0, /* bitpos */
1228 complain_overflow_dont,/* complain_on_overflow */
1229 bfd_elf_generic_reloc, /* special_function */
1230 "R_ARM_LDC_SB_G0", /* name */
1231 FALSE, /* partial_inplace */
1232 0xffffffff, /* src_mask */
1233 0xffffffff, /* dst_mask */
1234 TRUE), /* pcrel_offset */
1235
1236 HOWTO (R_ARM_LDC_SB_G1, /* type */
1237 0, /* rightshift */
1238 2, /* size (0 = byte, 1 = short, 2 = long) */
1239 32, /* bitsize */
1240 TRUE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont,/* complain_on_overflow */
1243 bfd_elf_generic_reloc, /* special_function */
1244 "R_ARM_LDC_SB_G1", /* name */
1245 FALSE, /* partial_inplace */
1246 0xffffffff, /* src_mask */
1247 0xffffffff, /* dst_mask */
1248 TRUE), /* pcrel_offset */
1249
1250 HOWTO (R_ARM_LDC_SB_G2, /* type */
1251 0, /* rightshift */
1252 2, /* size (0 = byte, 1 = short, 2 = long) */
1253 32, /* bitsize */
1254 TRUE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_dont,/* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_ARM_LDC_SB_G2", /* name */
1259 FALSE, /* partial_inplace */
1260 0xffffffff, /* src_mask */
1261 0xffffffff, /* dst_mask */
1262 TRUE), /* pcrel_offset */
1263
1264 /* End of group relocations. */
1265
1266 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
1267 0, /* rightshift */
1268 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 16, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_dont,/* complain_on_overflow */
1273 bfd_elf_generic_reloc, /* special_function */
1274 "R_ARM_MOVW_BREL_NC", /* name */
1275 FALSE, /* partial_inplace */
1276 0x0000ffff, /* src_mask */
1277 0x0000ffff, /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 HOWTO (R_ARM_MOVT_BREL, /* type */
1281 0, /* rightshift */
1282 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_bitfield,/* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_ARM_MOVT_BREL", /* name */
1289 FALSE, /* partial_inplace */
1290 0x0000ffff, /* src_mask */
1291 0x0000ffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 HOWTO (R_ARM_MOVW_BREL, /* type */
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont,/* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_ARM_MOVW_BREL", /* name */
1303 FALSE, /* partial_inplace */
1304 0x0000ffff, /* src_mask */
1305 0x0000ffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 16, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont,/* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_ARM_THM_MOVW_BREL_NC",/* name */
1317 FALSE, /* partial_inplace */
1318 0x040f70ff, /* src_mask */
1319 0x040f70ff, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 16, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_bitfield,/* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_ARM_THM_MOVT_BREL", /* name */
1331 FALSE, /* partial_inplace */
1332 0x040f70ff, /* src_mask */
1333 0x040f70ff, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 16, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont,/* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_ARM_THM_MOVW_BREL", /* name */
1345 FALSE, /* partial_inplace */
1346 0x040f70ff, /* src_mask */
1347 0x040f70ff, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 EMPTY_HOWTO (90), /* Unallocated. */
1351 EMPTY_HOWTO (91),
1352 EMPTY_HOWTO (92),
1353 EMPTY_HOWTO (93),
1354
1355 HOWTO (R_ARM_PLT32_ABS, /* type */
1356 0, /* rightshift */
1357 2, /* size (0 = byte, 1 = short, 2 = long) */
1358 32, /* bitsize */
1359 FALSE, /* pc_relative */
1360 0, /* bitpos */
1361 complain_overflow_dont,/* complain_on_overflow */
1362 bfd_elf_generic_reloc, /* special_function */
1363 "R_ARM_PLT32_ABS", /* name */
1364 FALSE, /* partial_inplace */
1365 0xffffffff, /* src_mask */
1366 0xffffffff, /* dst_mask */
1367 FALSE), /* pcrel_offset */
1368
1369 HOWTO (R_ARM_GOT_ABS, /* type */
1370 0, /* rightshift */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1372 32, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont,/* complain_on_overflow */
1376 bfd_elf_generic_reloc, /* special_function */
1377 "R_ARM_GOT_ABS", /* name */
1378 FALSE, /* partial_inplace */
1379 0xffffffff, /* src_mask */
1380 0xffffffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 HOWTO (R_ARM_GOT_PREL, /* type */
1384 0, /* rightshift */
1385 2, /* size (0 = byte, 1 = short, 2 = long) */
1386 32, /* bitsize */
1387 TRUE, /* pc_relative */
1388 0, /* bitpos */
1389 complain_overflow_dont, /* complain_on_overflow */
1390 bfd_elf_generic_reloc, /* special_function */
1391 "R_ARM_GOT_PREL", /* name */
1392 FALSE, /* partial_inplace */
1393 0xffffffff, /* src_mask */
1394 0xffffffff, /* dst_mask */
1395 TRUE), /* pcrel_offset */
1396
1397 HOWTO (R_ARM_GOT_BREL12, /* type */
1398 0, /* rightshift */
1399 2, /* size (0 = byte, 1 = short, 2 = long) */
1400 12, /* bitsize */
1401 FALSE, /* pc_relative */
1402 0, /* bitpos */
1403 complain_overflow_bitfield,/* complain_on_overflow */
1404 bfd_elf_generic_reloc, /* special_function */
1405 "R_ARM_GOT_BREL12", /* name */
1406 FALSE, /* partial_inplace */
1407 0x00000fff, /* src_mask */
1408 0x00000fff, /* dst_mask */
1409 FALSE), /* pcrel_offset */
1410
1411 HOWTO (R_ARM_GOTOFF12, /* type */
1412 0, /* rightshift */
1413 2, /* size (0 = byte, 1 = short, 2 = long) */
1414 12, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_bitfield,/* complain_on_overflow */
1418 bfd_elf_generic_reloc, /* special_function */
1419 "R_ARM_GOTOFF12", /* name */
1420 FALSE, /* partial_inplace */
1421 0x00000fff, /* src_mask */
1422 0x00000fff, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1426
1427 /* GNU extension to record C++ vtable member usage */
1428 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1429 0, /* rightshift */
1430 2, /* size (0 = byte, 1 = short, 2 = long) */
1431 0, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_dont, /* complain_on_overflow */
1435 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1436 "R_ARM_GNU_VTENTRY", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* GNU extension to record C++ vtable hierarchy */
1443 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1444 0, /* rightshift */
1445 2, /* size (0 = byte, 1 = short, 2 = long) */
1446 0, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_dont, /* complain_on_overflow */
1450 NULL, /* special_function */
1451 "R_ARM_GNU_VTINHERIT", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456
1457 HOWTO (R_ARM_THM_JUMP11, /* type */
1458 1, /* rightshift */
1459 1, /* size (0 = byte, 1 = short, 2 = long) */
1460 11, /* bitsize */
1461 TRUE, /* pc_relative */
1462 0, /* bitpos */
1463 complain_overflow_signed, /* complain_on_overflow */
1464 bfd_elf_generic_reloc, /* special_function */
1465 "R_ARM_THM_JUMP11", /* name */
1466 FALSE, /* partial_inplace */
1467 0x000007ff, /* src_mask */
1468 0x000007ff, /* dst_mask */
1469 TRUE), /* pcrel_offset */
1470
1471 HOWTO (R_ARM_THM_JUMP8, /* type */
1472 1, /* rightshift */
1473 1, /* size (0 = byte, 1 = short, 2 = long) */
1474 8, /* bitsize */
1475 TRUE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_signed, /* complain_on_overflow */
1478 bfd_elf_generic_reloc, /* special_function */
1479 "R_ARM_THM_JUMP8", /* name */
1480 FALSE, /* partial_inplace */
1481 0x000000ff, /* src_mask */
1482 0x000000ff, /* dst_mask */
1483 TRUE), /* pcrel_offset */
1484
1485 /* TLS relocations */
1486 HOWTO (R_ARM_TLS_GD32, /* type */
1487 0, /* rightshift */
1488 2, /* size (0 = byte, 1 = short, 2 = long) */
1489 32, /* bitsize */
1490 FALSE, /* pc_relative */
1491 0, /* bitpos */
1492 complain_overflow_bitfield,/* complain_on_overflow */
1493 NULL, /* special_function */
1494 "R_ARM_TLS_GD32", /* name */
1495 TRUE, /* partial_inplace */
1496 0xffffffff, /* src_mask */
1497 0xffffffff, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1499
1500 HOWTO (R_ARM_TLS_LDM32, /* type */
1501 0, /* rightshift */
1502 2, /* size (0 = byte, 1 = short, 2 = long) */
1503 32, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_bitfield,/* complain_on_overflow */
1507 bfd_elf_generic_reloc, /* special_function */
1508 "R_ARM_TLS_LDM32", /* name */
1509 TRUE, /* partial_inplace */
1510 0xffffffff, /* src_mask */
1511 0xffffffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 HOWTO (R_ARM_TLS_LDO32, /* type */
1515 0, /* rightshift */
1516 2, /* size (0 = byte, 1 = short, 2 = long) */
1517 32, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_bitfield,/* complain_on_overflow */
1521 bfd_elf_generic_reloc, /* special_function */
1522 "R_ARM_TLS_LDO32", /* name */
1523 TRUE, /* partial_inplace */
1524 0xffffffff, /* src_mask */
1525 0xffffffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 HOWTO (R_ARM_TLS_IE32, /* type */
1529 0, /* rightshift */
1530 2, /* size (0 = byte, 1 = short, 2 = long) */
1531 32, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_bitfield,/* complain_on_overflow */
1535 NULL, /* special_function */
1536 "R_ARM_TLS_IE32", /* name */
1537 TRUE, /* partial_inplace */
1538 0xffffffff, /* src_mask */
1539 0xffffffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 HOWTO (R_ARM_TLS_LE32, /* type */
1543 0, /* rightshift */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1545 32, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_bitfield,/* complain_on_overflow */
1549 bfd_elf_generic_reloc, /* special_function */
1550 "R_ARM_TLS_LE32", /* name */
1551 TRUE, /* partial_inplace */
1552 0xffffffff, /* src_mask */
1553 0xffffffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 HOWTO (R_ARM_TLS_LDO12, /* type */
1557 0, /* rightshift */
1558 2, /* size (0 = byte, 1 = short, 2 = long) */
1559 12, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_bitfield,/* complain_on_overflow */
1563 bfd_elf_generic_reloc, /* special_function */
1564 "R_ARM_TLS_LDO12", /* name */
1565 FALSE, /* partial_inplace */
1566 0x00000fff, /* src_mask */
1567 0x00000fff, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 HOWTO (R_ARM_TLS_LE12, /* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 12, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_bitfield,/* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_ARM_TLS_LE12", /* name */
1579 FALSE, /* partial_inplace */
1580 0x00000fff, /* src_mask */
1581 0x00000fff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 HOWTO (R_ARM_TLS_IE12GP, /* type */
1585 0, /* rightshift */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1587 12, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_bitfield,/* complain_on_overflow */
1591 bfd_elf_generic_reloc, /* special_function */
1592 "R_ARM_TLS_IE12GP", /* name */
1593 FALSE, /* partial_inplace */
1594 0x00000fff, /* src_mask */
1595 0x00000fff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597 };
1598
1599 /* 112-127 private relocations
1600 128 R_ARM_ME_TOO, obsolete
1601 129-255 unallocated in AAELF.
1602
1603 249-255 extended, currently unused, relocations: */
1604
1605 static reloc_howto_type elf32_arm_howto_table_2[4] =
1606 {
1607 HOWTO (R_ARM_RREL32, /* type */
1608 0, /* rightshift */
1609 0, /* size (0 = byte, 1 = short, 2 = long) */
1610 0, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont,/* complain_on_overflow */
1614 bfd_elf_generic_reloc, /* special_function */
1615 "R_ARM_RREL32", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 HOWTO (R_ARM_RABS32, /* type */
1622 0, /* rightshift */
1623 0, /* size (0 = byte, 1 = short, 2 = long) */
1624 0, /* bitsize */
1625 FALSE, /* pc_relative */
1626 0, /* bitpos */
1627 complain_overflow_dont,/* complain_on_overflow */
1628 bfd_elf_generic_reloc, /* special_function */
1629 "R_ARM_RABS32", /* name */
1630 FALSE, /* partial_inplace */
1631 0, /* src_mask */
1632 0, /* dst_mask */
1633 FALSE), /* pcrel_offset */
1634
1635 HOWTO (R_ARM_RPC24, /* type */
1636 0, /* rightshift */
1637 0, /* size (0 = byte, 1 = short, 2 = long) */
1638 0, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont,/* complain_on_overflow */
1642 bfd_elf_generic_reloc, /* special_function */
1643 "R_ARM_RPC24", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 HOWTO (R_ARM_RBASE, /* type */
1650 0, /* rightshift */
1651 0, /* size (0 = byte, 1 = short, 2 = long) */
1652 0, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont,/* complain_on_overflow */
1656 bfd_elf_generic_reloc, /* special_function */
1657 "R_ARM_RBASE", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0, /* dst_mask */
1661 FALSE) /* pcrel_offset */
1662 };
1663
1664 static reloc_howto_type *
1665 elf32_arm_howto_from_type (unsigned int r_type)
1666 {
1667 if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1))
1668 return &elf32_arm_howto_table_1[r_type];
1669
1670 if (r_type >= R_ARM_RREL32
1671 && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_2))
1672 return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32];
1673
1674 return NULL;
1675 }
1676
1677 static void
1678 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1679 Elf_Internal_Rela * elf_reloc)
1680 {
1681 unsigned int r_type;
1682
1683 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1684 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1685 }
1686
1687 struct elf32_arm_reloc_map
1688 {
1689 bfd_reloc_code_real_type bfd_reloc_val;
1690 unsigned char elf_reloc_val;
1691 };
1692
1693 /* All entries in this list must also be present in elf32_arm_howto_table. */
1694 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1695 {
1696 {BFD_RELOC_NONE, R_ARM_NONE},
1697 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1698 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1699 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1700 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1701 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1702 {BFD_RELOC_32, R_ARM_ABS32},
1703 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1704 {BFD_RELOC_8, R_ARM_ABS8},
1705 {BFD_RELOC_16, R_ARM_ABS16},
1706 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1707 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1708 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1709 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1710 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1711 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1712 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1713 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1714 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1715 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1716 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1717 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1718 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1719 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1720 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1721 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1722 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1723 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1724 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1725 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1726 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1727 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1728 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1729 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1730 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1731 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1732 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1733 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1734 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1735 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1736 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1737 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1738 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1739 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1740 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1741 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1742 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1743 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1744 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1745 {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC},
1746 {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0},
1747 {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC},
1748 {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1},
1749 {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2},
1750 {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0},
1751 {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1},
1752 {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2},
1753 {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0},
1754 {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1},
1755 {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2},
1756 {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0},
1757 {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1},
1758 {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2},
1759 {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC},
1760 {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0},
1761 {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC},
1762 {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1},
1763 {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2},
1764 {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0},
1765 {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1},
1766 {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2},
1767 {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0},
1768 {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1},
1769 {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2},
1770 {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0},
1771 {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1},
1772 {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2},
1773 {BFD_RELOC_ARM_V4BX, R_ARM_V4BX}
1774 };
1775
1776 static reloc_howto_type *
1777 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1778 bfd_reloc_code_real_type code)
1779 {
1780 unsigned int i;
1781
1782 for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++)
1783 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1784 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1785
1786 return NULL;
1787 }
1788
1789 static reloc_howto_type *
1790 elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1791 const char *r_name)
1792 {
1793 unsigned int i;
1794
1795 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); i++)
1796 if (elf32_arm_howto_table_1[i].name != NULL
1797 && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0)
1798 return &elf32_arm_howto_table_1[i];
1799
1800 for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++)
1801 if (elf32_arm_howto_table_2[i].name != NULL
1802 && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0)
1803 return &elf32_arm_howto_table_2[i];
1804
1805 return NULL;
1806 }
1807
1808 /* Support for core dump NOTE sections. */
1809
1810 static bfd_boolean
1811 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1812 {
1813 int offset;
1814 size_t size;
1815
1816 switch (note->descsz)
1817 {
1818 default:
1819 return FALSE;
1820
1821 case 148: /* Linux/ARM 32-bit. */
1822 /* pr_cursig */
1823 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1824
1825 /* pr_pid */
1826 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1827
1828 /* pr_reg */
1829 offset = 72;
1830 size = 72;
1831
1832 break;
1833 }
1834
1835 /* Make a ".reg/999" section. */
1836 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1837 size, note->descpos + offset);
1838 }
1839
1840 static bfd_boolean
1841 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1842 {
1843 switch (note->descsz)
1844 {
1845 default:
1846 return FALSE;
1847
1848 case 124: /* Linux/ARM elf_prpsinfo. */
1849 elf_tdata (abfd)->core_program
1850 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1851 elf_tdata (abfd)->core_command
1852 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1853 }
1854
1855 /* Note that for some reason, a spurious space is tacked
1856 onto the end of the args in some (at least one anyway)
1857 implementations, so strip it off if it exists. */
1858 {
1859 char *command = elf_tdata (abfd)->core_command;
1860 int n = strlen (command);
1861
1862 if (0 < n && command[n - 1] == ' ')
1863 command[n - 1] = '\0';
1864 }
1865
1866 return TRUE;
1867 }
1868
1869 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1870 #define TARGET_LITTLE_NAME "elf32-littlearm"
1871 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1872 #define TARGET_BIG_NAME "elf32-bigarm"
1873
1874 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1875 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1876
1877 typedef unsigned long int insn32;
1878 typedef unsigned short int insn16;
1879
1880 /* In lieu of proper flags, assume all EABIv4 or later objects are
1881 interworkable. */
1882 #define INTERWORK_FLAG(abfd) \
1883 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1884 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1885
1886 /* The linker script knows the section names for placement.
1887 The entry_names are used to do simple name mangling on the stubs.
1888 Given a function name, and its type, the stub can be found. The
1889 name can be changed. The only requirement is the %s be present. */
1890 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1891 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1892
1893 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1894 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1895
1896 #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer"
1897 #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x"
1898
1899 #define ARM_BX_GLUE_SECTION_NAME ".v4_bx"
1900 #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d"
1901
1902 #define STUB_ENTRY_NAME "__%s_veneer"
1903
1904 /* The name of the dynamic interpreter. This is put in the .interp
1905 section. */
1906 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1907
1908 #ifdef FOUR_WORD_PLT
1909
1910 /* The first entry in a procedure linkage table looks like
1911 this. It is set up so that any shared library function that is
1912 called before the relocation has been set up calls the dynamic
1913 linker first. */
1914 static const bfd_vma elf32_arm_plt0_entry [] =
1915 {
1916 0xe52de004, /* str lr, [sp, #-4]! */
1917 0xe59fe010, /* ldr lr, [pc, #16] */
1918 0xe08fe00e, /* add lr, pc, lr */
1919 0xe5bef008, /* ldr pc, [lr, #8]! */
1920 };
1921
1922 /* Subsequent entries in a procedure linkage table look like
1923 this. */
1924 static const bfd_vma elf32_arm_plt_entry [] =
1925 {
1926 0xe28fc600, /* add ip, pc, #NN */
1927 0xe28cca00, /* add ip, ip, #NN */
1928 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1929 0x00000000, /* unused */
1930 };
1931
1932 #else
1933
1934 /* The first entry in a procedure linkage table looks like
1935 this. It is set up so that any shared library function that is
1936 called before the relocation has been set up calls the dynamic
1937 linker first. */
1938 static const bfd_vma elf32_arm_plt0_entry [] =
1939 {
1940 0xe52de004, /* str lr, [sp, #-4]! */
1941 0xe59fe004, /* ldr lr, [pc, #4] */
1942 0xe08fe00e, /* add lr, pc, lr */
1943 0xe5bef008, /* ldr pc, [lr, #8]! */
1944 0x00000000, /* &GOT[0] - . */
1945 };
1946
1947 /* Subsequent entries in a procedure linkage table look like
1948 this. */
1949 static const bfd_vma elf32_arm_plt_entry [] =
1950 {
1951 0xe28fc600, /* add ip, pc, #0xNN00000 */
1952 0xe28cca00, /* add ip, ip, #0xNN000 */
1953 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1954 };
1955
1956 #endif
1957
1958 /* The format of the first entry in the procedure linkage table
1959 for a VxWorks executable. */
1960 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1961 {
1962 0xe52dc008, /* str ip,[sp,#-8]! */
1963 0xe59fc000, /* ldr ip,[pc] */
1964 0xe59cf008, /* ldr pc,[ip,#8] */
1965 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1966 };
1967
1968 /* The format of subsequent entries in a VxWorks executable. */
1969 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1970 {
1971 0xe59fc000, /* ldr ip,[pc] */
1972 0xe59cf000, /* ldr pc,[ip] */
1973 0x00000000, /* .long @got */
1974 0xe59fc000, /* ldr ip,[pc] */
1975 0xea000000, /* b _PLT */
1976 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1977 };
1978
1979 /* The format of entries in a VxWorks shared library. */
1980 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1981 {
1982 0xe59fc000, /* ldr ip,[pc] */
1983 0xe79cf009, /* ldr pc,[ip,r9] */
1984 0x00000000, /* .long @got */
1985 0xe59fc000, /* ldr ip,[pc] */
1986 0xe599f008, /* ldr pc,[r9,#8] */
1987 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1988 };
1989
1990 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1991 #define PLT_THUMB_STUB_SIZE 4
1992 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1993 {
1994 0x4778, /* bx pc */
1995 0x46c0 /* nop */
1996 };
1997
1998 /* The entries in a PLT when using a DLL-based target with multiple
1999 address spaces. */
2000 static const bfd_vma elf32_arm_symbian_plt_entry [] =
2001 {
2002 0xe51ff004, /* ldr pc, [pc, #-4] */
2003 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
2004 };
2005
2006 #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8)
2007 #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8)
2008 #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4)
2009 #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4)
2010 #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4)
2011 #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4)
2012
2013 static const bfd_vma arm_long_branch_stub[] =
2014 {
2015 0xe51ff004, /* ldr pc, [pc, #-4] */
2016 0x00000000, /* dcd R_ARM_ABS32(X) */
2017 };
2018
2019 static const bfd_vma arm_thumb_v4t_long_branch_stub[] =
2020 {
2021 0xe59fc000, /* ldr ip, [pc, #0] */
2022 0xe12fff1c, /* bx ip */
2023 0x00000000, /* dcd R_ARM_ABS32(X) */
2024 };
2025
2026 static const bfd_vma arm_thumb_thumb_long_branch_stub[] =
2027 {
2028 0x4e02b540, /* push {r6, lr} */
2029 /* ldr r6, [pc, #8] */
2030 0x473046fe, /* mov lr, pc */
2031 /* bx r6 */
2032 0xbf00bd40, /* pop {r6, pc} */
2033 /* nop */
2034 0x00000000, /* dcd R_ARM_ABS32(X) */
2035 };
2036
2037 static const bfd_vma arm_thumb_arm_v4t_long_branch_stub[] =
2038 {
2039 0x4e03b540, /* push {r6, lr} */
2040 /* ldr r6, [pc, #12] */
2041 0x473046fe, /* mov lr, pc */
2042 /* bx r6 */
2043 0xe8bd4040, /* pop {r6, pc} */
2044 0xe12fff1e, /* bx lr */
2045 0x00000000, /* dcd R_ARM_ABS32(X) */
2046 };
2047
2048 static const bfd_vma arm_thumb_arm_v4t_short_branch_stub[] =
2049 {
2050 0x46c04778, /* bx pc */
2051 /* nop */
2052 0xea000000, /* b (X) */
2053 };
2054
2055 static const bfd_vma arm_pic_long_branch_stub[] =
2056 {
2057 0xe59fc000, /* ldr r12, [pc] */
2058 0xe08ff00c, /* add pc, pc, ip */
2059 0x00000000, /* dcd R_ARM_REL32(X) */
2060 };
2061
2062 /* Section name for stubs is the associated section name plus this
2063 string. */
2064 #define STUB_SUFFIX ".stub"
2065
2066 enum elf32_arm_stub_type
2067 {
2068 arm_stub_none,
2069 arm_stub_long_branch,
2070 arm_thumb_v4t_stub_long_branch,
2071 arm_thumb_thumb_stub_long_branch,
2072 arm_thumb_arm_v4t_stub_long_branch,
2073 arm_thumb_arm_v4t_stub_short_branch,
2074 arm_stub_pic_long_branch,
2075 };
2076
2077 struct elf32_arm_stub_hash_entry
2078 {
2079 /* Base hash table entry structure. */
2080 struct bfd_hash_entry root;
2081
2082 /* The stub section. */
2083 asection *stub_sec;
2084
2085 /* Offset within stub_sec of the beginning of this stub. */
2086 bfd_vma stub_offset;
2087
2088 /* Given the symbol's value and its section we can determine its final
2089 value when building the stubs (so the stub knows where to jump). */
2090 bfd_vma target_value;
2091 asection *target_section;
2092
2093 enum elf32_arm_stub_type stub_type;
2094
2095 /* The symbol table entry, if any, that this was derived from. */
2096 struct elf32_arm_link_hash_entry *h;
2097
2098 /* Destination symbol type (STT_ARM_TFUNC, ...) */
2099 unsigned char st_type;
2100
2101 /* Where this stub is being called from, or, in the case of combined
2102 stub sections, the first input section in the group. */
2103 asection *id_sec;
2104
2105 /* The name for the local symbol at the start of this stub. The
2106 stub name in the hash table has to be unique; this does not, so
2107 it can be friendlier. */
2108 char *output_name;
2109 };
2110
2111 /* Used to build a map of a section. This is required for mixed-endian
2112 code/data. */
2113
2114 typedef struct elf32_elf_section_map
2115 {
2116 bfd_vma vma;
2117 char type;
2118 }
2119 elf32_arm_section_map;
2120
2121 /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */
2122
2123 typedef enum
2124 {
2125 VFP11_ERRATUM_BRANCH_TO_ARM_VENEER,
2126 VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER,
2127 VFP11_ERRATUM_ARM_VENEER,
2128 VFP11_ERRATUM_THUMB_VENEER
2129 }
2130 elf32_vfp11_erratum_type;
2131
2132 typedef struct elf32_vfp11_erratum_list
2133 {
2134 struct elf32_vfp11_erratum_list *next;
2135 bfd_vma vma;
2136 union
2137 {
2138 struct
2139 {
2140 struct elf32_vfp11_erratum_list *veneer;
2141 unsigned int vfp_insn;
2142 } b;
2143 struct
2144 {
2145 struct elf32_vfp11_erratum_list *branch;
2146 unsigned int id;
2147 } v;
2148 } u;
2149 elf32_vfp11_erratum_type type;
2150 }
2151 elf32_vfp11_erratum_list;
2152
2153 typedef struct _arm_elf_section_data
2154 {
2155 struct bfd_elf_section_data elf;
2156 unsigned int mapcount;
2157 unsigned int mapsize;
2158 elf32_arm_section_map *map;
2159 unsigned int erratumcount;
2160 elf32_vfp11_erratum_list *erratumlist;
2161 }
2162 _arm_elf_section_data;
2163
2164 #define elf32_arm_section_data(sec) \
2165 ((_arm_elf_section_data *) elf_section_data (sec))
2166
2167 /* The size of the thread control block. */
2168 #define TCB_SIZE 8
2169
2170 struct elf_arm_obj_tdata
2171 {
2172 struct elf_obj_tdata root;
2173
2174 /* tls_type for each local got entry. */
2175 char *local_got_tls_type;
2176
2177 /* Zero to warn when linking objects with incompatible enum sizes. */
2178 int no_enum_size_warning;
2179
2180 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2181 int no_wchar_size_warning;
2182 };
2183
2184 #define elf_arm_tdata(bfd) \
2185 ((struct elf_arm_obj_tdata *) (bfd)->tdata.any)
2186
2187 #define elf32_arm_local_got_tls_type(bfd) \
2188 (elf_arm_tdata (bfd)->local_got_tls_type)
2189
2190 #define is_arm_elf(bfd) \
2191 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2192 && elf_tdata (bfd) != NULL \
2193 && elf_object_id (bfd) == ARM_ELF_TDATA)
2194
2195 static bfd_boolean
2196 elf32_arm_mkobject (bfd *abfd)
2197 {
2198 return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata),
2199 ARM_ELF_TDATA);
2200 }
2201
2202 /* The ARM linker needs to keep track of the number of relocs that it
2203 decides to copy in check_relocs for each symbol. This is so that
2204 it can discard PC relative relocs if it doesn't need them when
2205 linking with -Bsymbolic. We store the information in a field
2206 extending the regular ELF linker hash table. */
2207
2208 /* This structure keeps track of the number of relocs we have copied
2209 for a given symbol. */
2210 struct elf32_arm_relocs_copied
2211 {
2212 /* Next section. */
2213 struct elf32_arm_relocs_copied * next;
2214 /* A section in dynobj. */
2215 asection * section;
2216 /* Number of relocs copied in this section. */
2217 bfd_size_type count;
2218 /* Number of PC-relative relocs copied in this section. */
2219 bfd_size_type pc_count;
2220 };
2221
2222 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
2223
2224 /* Arm ELF linker hash entry. */
2225 struct elf32_arm_link_hash_entry
2226 {
2227 struct elf_link_hash_entry root;
2228
2229 /* Number of PC relative relocs copied for this symbol. */
2230 struct elf32_arm_relocs_copied * relocs_copied;
2231
2232 /* We reference count Thumb references to a PLT entry separately,
2233 so that we can emit the Thumb trampoline only if needed. */
2234 bfd_signed_vma plt_thumb_refcount;
2235
2236 /* Some references from Thumb code may be eliminated by BL->BLX
2237 conversion, so record them separately. */
2238 bfd_signed_vma plt_maybe_thumb_refcount;
2239
2240 /* Since PLT entries have variable size if the Thumb prologue is
2241 used, we need to record the index into .got.plt instead of
2242 recomputing it from the PLT offset. */
2243 bfd_signed_vma plt_got_offset;
2244
2245 #define GOT_UNKNOWN 0
2246 #define GOT_NORMAL 1
2247 #define GOT_TLS_GD 2
2248 #define GOT_TLS_IE 4
2249 unsigned char tls_type;
2250
2251 /* The symbol marking the real symbol location for exported thumb
2252 symbols with Arm stubs. */
2253 struct elf_link_hash_entry *export_glue;
2254
2255 /* A pointer to the most recently used stub hash entry against this
2256 symbol. */
2257 struct elf32_arm_stub_hash_entry *stub_cache;
2258 };
2259
2260 /* Traverse an arm ELF linker hash table. */
2261 #define elf32_arm_link_hash_traverse(table, func, info) \
2262 (elf_link_hash_traverse \
2263 (&(table)->root, \
2264 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
2265 (info)))
2266
2267 /* Get the ARM elf linker hash table from a link_info structure. */
2268 #define elf32_arm_hash_table(info) \
2269 ((struct elf32_arm_link_hash_table *) ((info)->hash))
2270
2271 #define arm_stub_hash_lookup(table, string, create, copy) \
2272 ((struct elf32_arm_stub_hash_entry *) \
2273 bfd_hash_lookup ((table), (string), (create), (copy)))
2274
2275 /* ARM ELF linker hash table. */
2276 struct elf32_arm_link_hash_table
2277 {
2278 /* The main hash table. */
2279 struct elf_link_hash_table root;
2280
2281 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
2282 bfd_size_type thumb_glue_size;
2283
2284 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
2285 bfd_size_type arm_glue_size;
2286
2287 /* The size in bytes of section containing the ARMv4 BX veneers. */
2288 bfd_size_type bx_glue_size;
2289
2290 /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when
2291 veneer has been populated. */
2292 bfd_vma bx_glue_offset[15];
2293
2294 /* The size in bytes of the section containing glue for VFP11 erratum
2295 veneers. */
2296 bfd_size_type vfp11_erratum_glue_size;
2297
2298 /* An arbitrary input BFD chosen to hold the glue sections. */
2299 bfd * bfd_of_glue_owner;
2300
2301 /* Nonzero to output a BE8 image. */
2302 int byteswap_code;
2303
2304 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
2305 Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */
2306 int target1_is_rel;
2307
2308 /* The relocation to use for R_ARM_TARGET2 relocations. */
2309 int target2_reloc;
2310
2311 /* 0 = Ignore R_ARM_V4BX.
2312 1 = Convert BX to MOV PC.
2313 2 = Generate v4 interworing stubs. */
2314 int fix_v4bx;
2315
2316 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
2317 int use_blx;
2318
2319 /* What sort of code sequences we should look for which may trigger the
2320 VFP11 denorm erratum. */
2321 bfd_arm_vfp11_fix vfp11_fix;
2322
2323 /* Global counter for the number of fixes we have emitted. */
2324 int num_vfp11_fixes;
2325
2326 /* Nonzero to force PIC branch veneers. */
2327 int pic_veneer;
2328
2329 /* The number of bytes in the initial entry in the PLT. */
2330 bfd_size_type plt_header_size;
2331
2332 /* The number of bytes in the subsequent PLT etries. */
2333 bfd_size_type plt_entry_size;
2334
2335 /* True if the target system is VxWorks. */
2336 int vxworks_p;
2337
2338 /* True if the target system is Symbian OS. */
2339 int symbian_p;
2340
2341 /* True if the target uses REL relocations. */
2342 int use_rel;
2343
2344 /* Short-cuts to get to dynamic linker sections. */
2345 asection *sgot;
2346 asection *sgotplt;
2347 asection *srelgot;
2348 asection *splt;
2349 asection *srelplt;
2350 asection *sdynbss;
2351 asection *srelbss;
2352
2353 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
2354 asection *srelplt2;
2355
2356 /* Data for R_ARM_TLS_LDM32 relocations. */
2357 union
2358 {
2359 bfd_signed_vma refcount;
2360 bfd_vma offset;
2361 } tls_ldm_got;
2362
2363 /* Small local sym to section mapping cache. */
2364 struct sym_sec_cache sym_sec;
2365
2366 /* For convenience in allocate_dynrelocs. */
2367 bfd * obfd;
2368
2369 /* The stub hash table. */
2370 struct bfd_hash_table stub_hash_table;
2371
2372 /* Linker stub bfd. */
2373 bfd *stub_bfd;
2374
2375 /* Linker call-backs. */
2376 asection * (*add_stub_section) (const char *, asection *);
2377 void (*layout_sections_again) (void);
2378
2379 /* Array to keep track of which stub sections have been created, and
2380 information on stub grouping. */
2381 struct map_stub
2382 {
2383 /* This is the section to which stubs in the group will be
2384 attached. */
2385 asection *link_sec;
2386 /* The stub section. */
2387 asection *stub_sec;
2388 } *stub_group;
2389
2390 /* Assorted information used by elf32_arm_size_stubs. */
2391 unsigned int bfd_count;
2392 int top_index;
2393 asection **input_list;
2394 };
2395
2396 /* Create an entry in an ARM ELF linker hash table. */
2397
2398 static struct bfd_hash_entry *
2399 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
2400 struct bfd_hash_table * table,
2401 const char * string)
2402 {
2403 struct elf32_arm_link_hash_entry * ret =
2404 (struct elf32_arm_link_hash_entry *) entry;
2405
2406 /* Allocate the structure if it has not already been allocated by a
2407 subclass. */
2408 if (ret == NULL)
2409 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
2410 if (ret == NULL)
2411 return (struct bfd_hash_entry *) ret;
2412
2413 /* Call the allocation method of the superclass. */
2414 ret = ((struct elf32_arm_link_hash_entry *)
2415 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2416 table, string));
2417 if (ret != NULL)
2418 {
2419 ret->relocs_copied = NULL;
2420 ret->tls_type = GOT_UNKNOWN;
2421 ret->plt_thumb_refcount = 0;
2422 ret->plt_maybe_thumb_refcount = 0;
2423 ret->plt_got_offset = -1;
2424 ret->export_glue = NULL;
2425
2426 ret->stub_cache = NULL;
2427 }
2428
2429 return (struct bfd_hash_entry *) ret;
2430 }
2431
2432 /* Initialize an entry in the stub hash table. */
2433
2434 static struct bfd_hash_entry *
2435 stub_hash_newfunc (struct bfd_hash_entry *entry,
2436 struct bfd_hash_table *table,
2437 const char *string)
2438 {
2439 /* Allocate the structure if it has not already been allocated by a
2440 subclass. */
2441 if (entry == NULL)
2442 {
2443 entry = bfd_hash_allocate (table,
2444 sizeof (struct elf32_arm_stub_hash_entry));
2445 if (entry == NULL)
2446 return entry;
2447 }
2448
2449 /* Call the allocation method of the superclass. */
2450 entry = bfd_hash_newfunc (entry, table, string);
2451 if (entry != NULL)
2452 {
2453 struct elf32_arm_stub_hash_entry *eh;
2454
2455 /* Initialize the local fields. */
2456 eh = (struct elf32_arm_stub_hash_entry *) entry;
2457 eh->stub_sec = NULL;
2458 eh->stub_offset = 0;
2459 eh->target_value = 0;
2460 eh->target_section = NULL;
2461 eh->stub_type = arm_stub_none;
2462 eh->h = NULL;
2463 eh->id_sec = NULL;
2464 }
2465
2466 return entry;
2467 }
2468
2469 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2470 shortcuts to them in our hash table. */
2471
2472 static bfd_boolean
2473 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2474 {
2475 struct elf32_arm_link_hash_table *htab;
2476
2477 htab = elf32_arm_hash_table (info);
2478 /* BPABI objects never have a GOT, or associated sections. */
2479 if (htab->symbian_p)
2480 return TRUE;
2481
2482 if (! _bfd_elf_create_got_section (dynobj, info))
2483 return FALSE;
2484
2485 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2486 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2487 if (!htab->sgot || !htab->sgotplt)
2488 abort ();
2489
2490 htab->srelgot = bfd_make_section_with_flags (dynobj,
2491 RELOC_SECTION (htab, ".got"),
2492 (SEC_ALLOC | SEC_LOAD
2493 | SEC_HAS_CONTENTS
2494 | SEC_IN_MEMORY
2495 | SEC_LINKER_CREATED
2496 | SEC_READONLY));
2497 if (htab->srelgot == NULL
2498 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2499 return FALSE;
2500 return TRUE;
2501 }
2502
2503 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2504 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2505 hash table. */
2506
2507 static bfd_boolean
2508 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2509 {
2510 struct elf32_arm_link_hash_table *htab;
2511
2512 htab = elf32_arm_hash_table (info);
2513 if (!htab->sgot && !create_got_section (dynobj, info))
2514 return FALSE;
2515
2516 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2517 return FALSE;
2518
2519 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2520 htab->srelplt = bfd_get_section_by_name (dynobj,
2521 RELOC_SECTION (htab, ".plt"));
2522 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2523 if (!info->shared)
2524 htab->srelbss = bfd_get_section_by_name (dynobj,
2525 RELOC_SECTION (htab, ".bss"));
2526
2527 if (htab->vxworks_p)
2528 {
2529 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2530 return FALSE;
2531
2532 if (info->shared)
2533 {
2534 htab->plt_header_size = 0;
2535 htab->plt_entry_size
2536 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2537 }
2538 else
2539 {
2540 htab->plt_header_size
2541 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2542 htab->plt_entry_size
2543 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2544 }
2545 }
2546
2547 if (!htab->splt
2548 || !htab->srelplt
2549 || !htab->sdynbss
2550 || (!info->shared && !htab->srelbss))
2551 abort ();
2552
2553 return TRUE;
2554 }
2555
2556 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2557
2558 static void
2559 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2560 struct elf_link_hash_entry *dir,
2561 struct elf_link_hash_entry *ind)
2562 {
2563 struct elf32_arm_link_hash_entry *edir, *eind;
2564
2565 edir = (struct elf32_arm_link_hash_entry *) dir;
2566 eind = (struct elf32_arm_link_hash_entry *) ind;
2567
2568 if (eind->relocs_copied != NULL)
2569 {
2570 if (edir->relocs_copied != NULL)
2571 {
2572 struct elf32_arm_relocs_copied **pp;
2573 struct elf32_arm_relocs_copied *p;
2574
2575 /* Add reloc counts against the indirect sym to the direct sym
2576 list. Merge any entries against the same section. */
2577 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2578 {
2579 struct elf32_arm_relocs_copied *q;
2580
2581 for (q = edir->relocs_copied; q != NULL; q = q->next)
2582 if (q->section == p->section)
2583 {
2584 q->pc_count += p->pc_count;
2585 q->count += p->count;
2586 *pp = p->next;
2587 break;
2588 }
2589 if (q == NULL)
2590 pp = &p->next;
2591 }
2592 *pp = edir->relocs_copied;
2593 }
2594
2595 edir->relocs_copied = eind->relocs_copied;
2596 eind->relocs_copied = NULL;
2597 }
2598
2599 if (ind->root.type == bfd_link_hash_indirect)
2600 {
2601 /* Copy over PLT info. */
2602 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2603 eind->plt_thumb_refcount = 0;
2604 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
2605 eind->plt_maybe_thumb_refcount = 0;
2606
2607 if (dir->got.refcount <= 0)
2608 {
2609 edir->tls_type = eind->tls_type;
2610 eind->tls_type = GOT_UNKNOWN;
2611 }
2612 }
2613
2614 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2615 }
2616
2617 /* Create an ARM elf linker hash table. */
2618
2619 static struct bfd_link_hash_table *
2620 elf32_arm_link_hash_table_create (bfd *abfd)
2621 {
2622 struct elf32_arm_link_hash_table *ret;
2623 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2624
2625 ret = bfd_malloc (amt);
2626 if (ret == NULL)
2627 return NULL;
2628
2629 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2630 elf32_arm_link_hash_newfunc,
2631 sizeof (struct elf32_arm_link_hash_entry)))
2632 {
2633 free (ret);
2634 return NULL;
2635 }
2636
2637 ret->sgot = NULL;
2638 ret->sgotplt = NULL;
2639 ret->srelgot = NULL;
2640 ret->splt = NULL;
2641 ret->srelplt = NULL;
2642 ret->sdynbss = NULL;
2643 ret->srelbss = NULL;
2644 ret->srelplt2 = NULL;
2645 ret->thumb_glue_size = 0;
2646 ret->arm_glue_size = 0;
2647 ret->bx_glue_size = 0;
2648 memset (ret->bx_glue_offset, 0, sizeof (ret->bx_glue_offset));
2649 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2650 ret->vfp11_erratum_glue_size = 0;
2651 ret->num_vfp11_fixes = 0;
2652 ret->bfd_of_glue_owner = NULL;
2653 ret->byteswap_code = 0;
2654 ret->target1_is_rel = 0;
2655 ret->target2_reloc = R_ARM_NONE;
2656 #ifdef FOUR_WORD_PLT
2657 ret->plt_header_size = 16;
2658 ret->plt_entry_size = 16;
2659 #else
2660 ret->plt_header_size = 20;
2661 ret->plt_entry_size = 12;
2662 #endif
2663 ret->fix_v4bx = 0;
2664 ret->use_blx = 0;
2665 ret->vxworks_p = 0;
2666 ret->symbian_p = 0;
2667 ret->use_rel = 1;
2668 ret->sym_sec.abfd = NULL;
2669 ret->obfd = abfd;
2670 ret->tls_ldm_got.refcount = 0;
2671 ret->stub_bfd = NULL;
2672 ret->add_stub_section = NULL;
2673 ret->layout_sections_again = NULL;
2674 ret->stub_group = NULL;
2675 ret->bfd_count = 0;
2676 ret->top_index = 0;
2677 ret->input_list = NULL;
2678
2679 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2680 sizeof (struct elf32_arm_stub_hash_entry)))
2681 {
2682 free (ret);
2683 return NULL;
2684 }
2685
2686 return &ret->root.root;
2687 }
2688
2689 /* Free the derived linker hash table. */
2690
2691 static void
2692 elf32_arm_hash_table_free (struct bfd_link_hash_table *hash)
2693 {
2694 struct elf32_arm_link_hash_table *ret
2695 = (struct elf32_arm_link_hash_table *) hash;
2696
2697 bfd_hash_table_free (&ret->stub_hash_table);
2698 _bfd_generic_link_hash_table_free (hash);
2699 }
2700
2701 /* Determine if we're dealing with a Thumb only architecture. */
2702
2703 static bfd_boolean
2704 using_thumb_only (struct elf32_arm_link_hash_table *globals)
2705 {
2706 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2707 Tag_CPU_arch);
2708 int profile;
2709
2710 if (arch != TAG_CPU_ARCH_V7)
2711 return FALSE;
2712
2713 profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2714 Tag_CPU_arch_profile);
2715
2716 return profile == 'M';
2717 }
2718
2719 /* Determine if we're dealing with a Thumb-2 object. */
2720
2721 static bfd_boolean
2722 using_thumb2 (struct elf32_arm_link_hash_table *globals)
2723 {
2724 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2725 Tag_CPU_arch);
2726 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
2727 }
2728
2729 static bfd_boolean
2730 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
2731 {
2732 switch (stub_type)
2733 {
2734 case arm_thumb_thumb_stub_long_branch:
2735 case arm_thumb_arm_v4t_stub_long_branch:
2736 case arm_thumb_arm_v4t_stub_short_branch:
2737 return TRUE;
2738 case arm_stub_none:
2739 BFD_FAIL ();
2740 return FALSE;
2741 break;
2742 default:
2743 return FALSE;
2744 }
2745 }
2746
2747 /* Determine the type of stub needed, if any, for a call. */
2748
2749 static enum elf32_arm_stub_type
2750 arm_type_of_stub (struct bfd_link_info *info,
2751 asection *input_sec,
2752 const Elf_Internal_Rela *rel,
2753 unsigned char st_type,
2754 struct elf32_arm_link_hash_entry *hash,
2755 bfd_vma destination,
2756 asection *sym_sec,
2757 bfd *input_bfd,
2758 const char *name)
2759 {
2760 bfd_vma location;
2761 bfd_signed_vma branch_offset;
2762 unsigned int r_type;
2763 struct elf32_arm_link_hash_table * globals;
2764 int thumb2;
2765 int thumb_only;
2766 enum elf32_arm_stub_type stub_type = arm_stub_none;
2767
2768 /* We don't know the actual type of destination in case it is of
2769 type STT_SECTION: give up. */
2770 if (st_type == STT_SECTION)
2771 return stub_type;
2772
2773 globals = elf32_arm_hash_table (info);
2774
2775 thumb_only = using_thumb_only (globals);
2776
2777 thumb2 = using_thumb2 (globals);
2778
2779 /* Determine where the call point is. */
2780 location = (input_sec->output_offset
2781 + input_sec->output_section->vma
2782 + rel->r_offset);
2783
2784 branch_offset = (bfd_signed_vma)(destination - location);
2785
2786 r_type = ELF32_R_TYPE (rel->r_info);
2787
2788 /* If the call will go through a PLT entry then we do not need
2789 glue. */
2790 if (globals->splt != NULL && hash != NULL && hash->root.plt.offset != (bfd_vma) -1)
2791 return stub_type;
2792
2793 if (r_type == R_ARM_THM_CALL)
2794 {
2795 if ((!thumb2
2796 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
2797 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
2798 || (thumb2
2799 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
2800 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
2801 || ((st_type != STT_ARM_TFUNC) && !globals->use_blx))
2802 {
2803 if (st_type == STT_ARM_TFUNC)
2804 {
2805 /* Thumb to thumb. */
2806 if (!thumb_only)
2807 {
2808 stub_type = (info->shared | globals->pic_veneer)
2809 ? ((globals->use_blx)
2810 ? arm_stub_pic_long_branch
2811 : arm_stub_none)
2812 : (globals->use_blx)
2813 ? arm_stub_long_branch
2814 : arm_stub_none;
2815 }
2816 else
2817 {
2818 stub_type = (info->shared | globals->pic_veneer)
2819 ? arm_stub_none
2820 : (globals->use_blx)
2821 ? arm_thumb_thumb_stub_long_branch
2822 : arm_stub_none;
2823 }
2824 }
2825 else
2826 {
2827 /* Thumb to arm. */
2828 if (sym_sec != NULL
2829 && sym_sec->owner != NULL
2830 && !INTERWORK_FLAG (sym_sec->owner))
2831 {
2832 (*_bfd_error_handler)
2833 (_("%B(%s): warning: interworking not enabled.\n"
2834 " first occurrence: %B: Thumb call to ARM"),
2835 sym_sec->owner, input_bfd, name);
2836 }
2837
2838 stub_type = (info->shared | globals->pic_veneer)
2839 ? ((globals->use_blx)
2840 ? arm_stub_pic_long_branch
2841 : arm_stub_none)
2842 : (globals->use_blx)
2843 ? arm_stub_long_branch
2844 : arm_thumb_arm_v4t_stub_long_branch;
2845
2846 /* Handle v4t short branches. */
2847 if ((stub_type == arm_thumb_arm_v4t_stub_long_branch)
2848 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
2849 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
2850 stub_type = arm_thumb_arm_v4t_stub_short_branch;
2851 }
2852 }
2853 }
2854 else if (r_type == R_ARM_CALL)
2855 {
2856 if (st_type == STT_ARM_TFUNC)
2857 {
2858 /* Arm to thumb. */
2859
2860 if (sym_sec != NULL
2861 && sym_sec->owner != NULL
2862 && !INTERWORK_FLAG (sym_sec->owner))
2863 {
2864 (*_bfd_error_handler)
2865 (_("%B(%s): warning: interworking not enabled.\n"
2866 " first occurrence: %B: Thumb call to ARM"),
2867 sym_sec->owner, input_bfd, name);
2868 }
2869
2870 /* We have an extra 2-bytes reach because of
2871 the mode change (bit 24 (H) of BLX encoding). */
2872 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
2873 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
2874 || !globals->use_blx)
2875 {
2876 stub_type = (info->shared | globals->pic_veneer)
2877 ? arm_stub_pic_long_branch
2878 : (globals->use_blx)
2879 ? arm_stub_long_branch
2880 : arm_thumb_v4t_stub_long_branch;
2881 }
2882 }
2883 else
2884 {
2885 /* Arm to arm. */
2886 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
2887 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
2888 {
2889 stub_type = (info->shared | globals->pic_veneer)
2890 ? arm_stub_pic_long_branch
2891 : arm_stub_long_branch;
2892 }
2893 }
2894 }
2895
2896 return stub_type;
2897 }
2898
2899 /* Build a name for an entry in the stub hash table. */
2900
2901 static char *
2902 elf32_arm_stub_name (const asection *input_section,
2903 const asection *sym_sec,
2904 const struct elf32_arm_link_hash_entry *hash,
2905 const Elf_Internal_Rela *rel)
2906 {
2907 char *stub_name;
2908 bfd_size_type len;
2909
2910 if (hash)
2911 {
2912 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1;
2913 stub_name = bfd_malloc (len);
2914 if (stub_name != NULL)
2915 sprintf (stub_name, "%08x_%s+%x",
2916 input_section->id & 0xffffffff,
2917 hash->root.root.root.string,
2918 (int) rel->r_addend & 0xffffffff);
2919 }
2920 else
2921 {
2922 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
2923 stub_name = bfd_malloc (len);
2924 if (stub_name != NULL)
2925 sprintf (stub_name, "%08x_%x:%x+%x",
2926 input_section->id & 0xffffffff,
2927 sym_sec->id & 0xffffffff,
2928 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
2929 (int) rel->r_addend & 0xffffffff);
2930 }
2931
2932 return stub_name;
2933 }
2934
2935 /* Look up an entry in the stub hash. Stub entries are cached because
2936 creating the stub name takes a bit of time. */
2937
2938 static struct elf32_arm_stub_hash_entry *
2939 elf32_arm_get_stub_entry (const asection *input_section,
2940 const asection *sym_sec,
2941 struct elf_link_hash_entry *hash,
2942 const Elf_Internal_Rela *rel,
2943 struct elf32_arm_link_hash_table *htab)
2944 {
2945 struct elf32_arm_stub_hash_entry *stub_entry;
2946 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
2947 const asection *id_sec;
2948
2949 if ((input_section->flags & SEC_CODE) == 0)
2950 return NULL;
2951
2952 /* If this input section is part of a group of sections sharing one
2953 stub section, then use the id of the first section in the group.
2954 Stub names need to include a section id, as there may well be
2955 more than one stub used to reach say, printf, and we need to
2956 distinguish between them. */
2957 id_sec = htab->stub_group[input_section->id].link_sec;
2958
2959 if (h != NULL && h->stub_cache != NULL
2960 && h->stub_cache->h == h
2961 && h->stub_cache->id_sec == id_sec)
2962 {
2963 stub_entry = h->stub_cache;
2964 }
2965 else
2966 {
2967 char *stub_name;
2968
2969 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel);
2970 if (stub_name == NULL)
2971 return NULL;
2972
2973 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
2974 stub_name, FALSE, FALSE);
2975 if (h != NULL)
2976 h->stub_cache = stub_entry;
2977
2978 free (stub_name);
2979 }
2980
2981 return stub_entry;
2982 }
2983
2984 /* Add a new stub entry to the stub hash. Not all fields of the new
2985 stub entry are initialised. */
2986
2987 static struct elf32_arm_stub_hash_entry *
2988 elf32_arm_add_stub (const char *stub_name,
2989 asection *section,
2990 struct elf32_arm_link_hash_table *htab)
2991 {
2992 asection *link_sec;
2993 asection *stub_sec;
2994 struct elf32_arm_stub_hash_entry *stub_entry;
2995
2996 link_sec = htab->stub_group[section->id].link_sec;
2997 stub_sec = htab->stub_group[section->id].stub_sec;
2998 if (stub_sec == NULL)
2999 {
3000 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3001 if (stub_sec == NULL)
3002 {
3003 size_t namelen;
3004 bfd_size_type len;
3005 char *s_name;
3006
3007 namelen = strlen (link_sec->name);
3008 len = namelen + sizeof (STUB_SUFFIX);
3009 s_name = bfd_alloc (htab->stub_bfd, len);
3010 if (s_name == NULL)
3011 return NULL;
3012
3013 memcpy (s_name, link_sec->name, namelen);
3014 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3015 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3016 if (stub_sec == NULL)
3017 return NULL;
3018 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3019 }
3020 htab->stub_group[section->id].stub_sec = stub_sec;
3021 }
3022
3023 /* Enter this entry into the linker stub hash table. */
3024 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3025 TRUE, FALSE);
3026 if (stub_entry == NULL)
3027 {
3028 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3029 section->owner,
3030 stub_name);
3031 return NULL;
3032 }
3033
3034 stub_entry->stub_sec = stub_sec;
3035 stub_entry->stub_offset = 0;
3036 stub_entry->id_sec = link_sec;
3037
3038 return stub_entry;
3039 }
3040
3041 /* Store an Arm insn into an output section not processed by
3042 elf32_arm_write_section. */
3043
3044 static void
3045 put_arm_insn (struct elf32_arm_link_hash_table * htab,
3046 bfd * output_bfd, bfd_vma val, void * ptr)
3047 {
3048 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3049 bfd_putl32 (val, ptr);
3050 else
3051 bfd_putb32 (val, ptr);
3052 }
3053
3054 /* Store a 16-bit Thumb insn into an output section not processed by
3055 elf32_arm_write_section. */
3056
3057 static void
3058 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
3059 bfd * output_bfd, bfd_vma val, void * ptr)
3060 {
3061 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3062 bfd_putl16 (val, ptr);
3063 else
3064 bfd_putb16 (val, ptr);
3065 }
3066
3067 static bfd_boolean
3068 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
3069 void * in_arg)
3070 {
3071 struct elf32_arm_stub_hash_entry *stub_entry;
3072 struct bfd_link_info *info;
3073 struct elf32_arm_link_hash_table *htab;
3074 asection *stub_sec;
3075 bfd *stub_bfd;
3076 bfd_vma stub_addr;
3077 bfd_byte *loc;
3078 bfd_vma sym_value;
3079 int template_size;
3080 int size;
3081 const bfd_vma *template;
3082 int i;
3083 struct elf32_arm_link_hash_table * globals;
3084
3085 /* Massage our args to the form they really have. */
3086 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3087 info = (struct bfd_link_info *) in_arg;
3088
3089 globals = elf32_arm_hash_table (info);
3090
3091 htab = elf32_arm_hash_table (info);
3092 stub_sec = stub_entry->stub_sec;
3093
3094 /* Make a note of the offset within the stubs for this entry. */
3095 stub_entry->stub_offset = stub_sec->size;
3096 loc = stub_sec->contents + stub_entry->stub_offset;
3097
3098 stub_bfd = stub_sec->owner;
3099
3100 /* This is the address of the start of the stub. */
3101 stub_addr = stub_sec->output_section->vma + stub_sec->output_offset
3102 + stub_entry->stub_offset;
3103
3104 /* This is the address of the stub destination. */
3105 sym_value = (stub_entry->target_value
3106 + stub_entry->target_section->output_offset
3107 + stub_entry->target_section->output_section->vma);
3108
3109 switch (stub_entry->stub_type)
3110 {
3111 case arm_stub_long_branch:
3112 template = arm_long_branch_stub;
3113 template_size = (sizeof (arm_long_branch_stub) / sizeof (bfd_vma)) * 4;
3114 break;
3115 case arm_thumb_v4t_stub_long_branch:
3116 template = arm_thumb_v4t_long_branch_stub;
3117 template_size = (sizeof (arm_thumb_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3118 break;
3119 case arm_thumb_thumb_stub_long_branch:
3120 template = arm_thumb_thumb_long_branch_stub;
3121 template_size = (sizeof (arm_thumb_thumb_long_branch_stub) / sizeof (bfd_vma)) * 4;
3122 break;
3123 case arm_thumb_arm_v4t_stub_long_branch:
3124 template = arm_thumb_arm_v4t_long_branch_stub;
3125 template_size = (sizeof (arm_thumb_arm_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3126 break;
3127 case arm_thumb_arm_v4t_stub_short_branch:
3128 template = arm_thumb_arm_v4t_short_branch_stub;
3129 template_size = (sizeof(arm_thumb_arm_v4t_short_branch_stub) / sizeof (bfd_vma)) * 4;
3130 break;
3131 case arm_stub_pic_long_branch:
3132 template = arm_pic_long_branch_stub;
3133 template_size = (sizeof (arm_pic_long_branch_stub) / sizeof (bfd_vma)) * 4;
3134 break;
3135 default:
3136 BFD_FAIL ();
3137 return FALSE;
3138 }
3139
3140 size = 0;
3141 for (i = 0; i < (template_size / 4); i++)
3142 {
3143 /* A 0 pattern is a placeholder, every other pattern is an
3144 instruction. */
3145 if (template[i] != 0)
3146 put_arm_insn (globals, stub_bfd, template[i], loc + size);
3147 else
3148 bfd_put_32 (stub_bfd, template[i], loc + size);
3149
3150 size += 4;
3151 }
3152 stub_sec->size += size;
3153
3154 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3155 if (stub_entry->st_type == STT_ARM_TFUNC)
3156 sym_value |= 1;
3157
3158 switch (stub_entry->stub_type)
3159 {
3160 case arm_stub_long_branch:
3161 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3162 stub_bfd, stub_sec, stub_sec->contents,
3163 stub_entry->stub_offset + 4, sym_value, 0);
3164 break;
3165 case arm_thumb_v4t_stub_long_branch:
3166 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3167 stub_bfd, stub_sec, stub_sec->contents,
3168 stub_entry->stub_offset + 8, sym_value, 0);
3169 break;
3170 case arm_thumb_thumb_stub_long_branch:
3171 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3172 stub_bfd, stub_sec, stub_sec->contents,
3173 stub_entry->stub_offset + 12, sym_value, 0);
3174 break;
3175 case arm_thumb_arm_v4t_stub_long_branch:
3176 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3177 stub_bfd, stub_sec, stub_sec->contents,
3178 stub_entry->stub_offset + 16, sym_value, 0);
3179 break;
3180 case arm_thumb_arm_v4t_stub_short_branch:
3181 {
3182 long int rel_offset;
3183 static const insn32 t2a3_b_insn = 0xea000000;
3184
3185 rel_offset = sym_value - (stub_addr + 8 + 4);
3186
3187 put_arm_insn (globals, stub_bfd,
3188 (bfd_vma) t2a3_b_insn | ((rel_offset >> 2) & 0x00FFFFFF),
3189 loc + 4);
3190 }
3191 break;
3192
3193 case arm_stub_pic_long_branch:
3194 /* We want the value relative to the address 8 bytes from the
3195 start of the stub. */
3196 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_REL32),
3197 stub_bfd, stub_sec, stub_sec->contents,
3198 stub_entry->stub_offset + 8, sym_value, 0);
3199 break;
3200 default:
3201 break;
3202 }
3203
3204 return TRUE;
3205 }
3206
3207 /* As above, but don't actually build the stub. Just bump offset so
3208 we know stub section sizes. */
3209
3210 static bfd_boolean
3211 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
3212 void * in_arg)
3213 {
3214 struct elf32_arm_stub_hash_entry *stub_entry;
3215 struct elf32_arm_link_hash_table *htab;
3216 const bfd_vma *template;
3217 int template_size;
3218 int size;
3219 int i;
3220
3221 /* Massage our args to the form they really have. */
3222 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3223 htab = (struct elf32_arm_link_hash_table *) in_arg;
3224
3225 switch (stub_entry->stub_type)
3226 {
3227 case arm_stub_long_branch:
3228 template = arm_long_branch_stub;
3229 template_size = (sizeof (arm_long_branch_stub) / sizeof (bfd_vma)) * 4;
3230 break;
3231 case arm_thumb_v4t_stub_long_branch:
3232 template = arm_thumb_v4t_long_branch_stub;
3233 template_size = (sizeof (arm_thumb_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3234 break;
3235 case arm_thumb_thumb_stub_long_branch:
3236 template = arm_thumb_thumb_long_branch_stub;
3237 template_size = (sizeof (arm_thumb_thumb_long_branch_stub) / sizeof (bfd_vma)) * 4;
3238 break;
3239 case arm_thumb_arm_v4t_stub_long_branch:
3240 template = arm_thumb_arm_v4t_long_branch_stub;
3241 template_size = (sizeof (arm_thumb_arm_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3242 break;
3243 case arm_thumb_arm_v4t_stub_short_branch:
3244 template = arm_thumb_arm_v4t_short_branch_stub;
3245 template_size = (sizeof(arm_thumb_arm_v4t_short_branch_stub) / sizeof (bfd_vma)) * 4;
3246 break;
3247 case arm_stub_pic_long_branch:
3248 template = arm_pic_long_branch_stub;
3249 template_size = (sizeof (arm_pic_long_branch_stub) / sizeof (bfd_vma)) * 4;
3250 break;
3251 default:
3252 BFD_FAIL ();
3253 return FALSE;
3254 break;
3255 }
3256
3257 size = 0;
3258 for (i = 0; i < (template_size / 4); i++)
3259 size += 4;
3260 size = (size + 7) & ~7;
3261 stub_entry->stub_sec->size += size;
3262 return TRUE;
3263 }
3264
3265 /* External entry points for sizing and building linker stubs. */
3266
3267 /* Set up various things so that we can make a list of input sections
3268 for each output section included in the link. Returns -1 on error,
3269 0 when no stubs will be needed, and 1 on success. */
3270
3271 int
3272 elf32_arm_setup_section_lists (bfd *output_bfd,
3273 struct bfd_link_info *info)
3274 {
3275 bfd *input_bfd;
3276 unsigned int bfd_count;
3277 int top_id, top_index;
3278 asection *section;
3279 asection **input_list, **list;
3280 bfd_size_type amt;
3281 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3282
3283 if (! is_elf_hash_table (htab))
3284 return 0;
3285
3286 /* Count the number of input BFDs and find the top input section id. */
3287 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3288 input_bfd != NULL;
3289 input_bfd = input_bfd->link_next)
3290 {
3291 bfd_count += 1;
3292 for (section = input_bfd->sections;
3293 section != NULL;
3294 section = section->next)
3295 {
3296 if (top_id < section->id)
3297 top_id = section->id;
3298 }
3299 }
3300 htab->bfd_count = bfd_count;
3301
3302 amt = sizeof (struct map_stub) * (top_id + 1);
3303 htab->stub_group = bfd_zmalloc (amt);
3304 if (htab->stub_group == NULL)
3305 return -1;
3306
3307 /* We can't use output_bfd->section_count here to find the top output
3308 section index as some sections may have been removed, and
3309 _bfd_strip_section_from_output doesn't renumber the indices. */
3310 for (section = output_bfd->sections, top_index = 0;
3311 section != NULL;
3312 section = section->next)
3313 {
3314 if (top_index < section->index)
3315 top_index = section->index;
3316 }
3317
3318 htab->top_index = top_index;
3319 amt = sizeof (asection *) * (top_index + 1);
3320 input_list = bfd_malloc (amt);
3321 htab->input_list = input_list;
3322 if (input_list == NULL)
3323 return -1;
3324
3325 /* For sections we aren't interested in, mark their entries with a
3326 value we can check later. */
3327 list = input_list + top_index;
3328 do
3329 *list = bfd_abs_section_ptr;
3330 while (list-- != input_list);
3331
3332 for (section = output_bfd->sections;
3333 section != NULL;
3334 section = section->next)
3335 {
3336 if ((section->flags & SEC_CODE) != 0)
3337 input_list[section->index] = NULL;
3338 }
3339
3340 return 1;
3341 }
3342
3343 /* The linker repeatedly calls this function for each input section,
3344 in the order that input sections are linked into output sections.
3345 Build lists of input sections to determine groupings between which
3346 we may insert linker stubs. */
3347
3348 void
3349 elf32_arm_next_input_section (struct bfd_link_info *info,
3350 asection *isec)
3351 {
3352 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3353
3354 if (isec->output_section->index <= htab->top_index)
3355 {
3356 asection **list = htab->input_list + isec->output_section->index;
3357
3358 if (*list != bfd_abs_section_ptr)
3359 {
3360 /* Steal the link_sec pointer for our list. */
3361 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3362 /* This happens to make the list in reverse order,
3363 which is what we want. */
3364 PREV_SEC (isec) = *list;
3365 *list = isec;
3366 }
3367 }
3368 }
3369
3370 /* See whether we can group stub sections together. Grouping stub
3371 sections may result in fewer stubs. More importantly, we need to
3372 put all .init* and .fini* stubs at the beginning of the .init or
3373 .fini output sections respectively, because glibc splits the
3374 _init and _fini functions into multiple parts. Putting a stub in
3375 the middle of a function is not a good idea. */
3376
3377 static void
3378 group_sections (struct elf32_arm_link_hash_table *htab,
3379 bfd_size_type stub_group_size,
3380 bfd_boolean stubs_always_before_branch)
3381 {
3382 asection **list = htab->input_list + htab->top_index;
3383
3384 do
3385 {
3386 asection *tail = *list;
3387
3388 if (tail == bfd_abs_section_ptr)
3389 continue;
3390
3391 while (tail != NULL)
3392 {
3393 asection *curr;
3394 asection *prev;
3395 bfd_size_type total;
3396
3397 curr = tail;
3398 total = tail->size;
3399 while ((prev = PREV_SEC (curr)) != NULL
3400 && ((total += curr->output_offset - prev->output_offset)
3401 < stub_group_size))
3402 curr = prev;
3403
3404 /* OK, the size from the start of CURR to the end is less
3405 than stub_group_size and thus can be handled by one stub
3406 section. (Or the tail section is itself larger than
3407 stub_group_size, in which case we may be toast.)
3408 We should really be keeping track of the total size of
3409 stubs added here, as stubs contribute to the final output
3410 section size. */
3411 do
3412 {
3413 prev = PREV_SEC (tail);
3414 /* Set up this stub group. */
3415 htab->stub_group[tail->id].link_sec = curr;
3416 }
3417 while (tail != curr && (tail = prev) != NULL);
3418
3419 /* But wait, there's more! Input sections up to stub_group_size
3420 bytes before the stub section can be handled by it too. */
3421 if (!stubs_always_before_branch)
3422 {
3423 total = 0;
3424 while (prev != NULL
3425 && ((total += tail->output_offset - prev->output_offset)
3426 < stub_group_size))
3427 {
3428 tail = prev;
3429 prev = PREV_SEC (tail);
3430 htab->stub_group[tail->id].link_sec = curr;
3431 }
3432 }
3433 tail = prev;
3434 }
3435 }
3436 while (list-- != htab->input_list);
3437
3438 free (htab->input_list);
3439 #undef PREV_SEC
3440 }
3441
3442 /* Determine and set the size of the stub section for a final link.
3443
3444 The basic idea here is to examine all the relocations looking for
3445 PC-relative calls to a target that is unreachable with a "bl"
3446 instruction. */
3447
3448 bfd_boolean
3449 elf32_arm_size_stubs (bfd *output_bfd,
3450 bfd *stub_bfd,
3451 struct bfd_link_info *info,
3452 bfd_signed_vma group_size,
3453 asection * (*add_stub_section) (const char *, asection *),
3454 void (*layout_sections_again) (void))
3455 {
3456 bfd_size_type stub_group_size;
3457 bfd_boolean stubs_always_before_branch;
3458 bfd_boolean stub_changed = 0;
3459 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3460
3461 /* Propagate mach to stub bfd, because it may not have been
3462 finalized when we created stub_bfd. */
3463 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3464 bfd_get_mach (output_bfd));
3465
3466 /* Stash our params away. */
3467 htab->stub_bfd = stub_bfd;
3468 htab->add_stub_section = add_stub_section;
3469 htab->layout_sections_again = layout_sections_again;
3470 stubs_always_before_branch = group_size < 0;
3471 if (group_size < 0)
3472 stub_group_size = -group_size;
3473 else
3474 stub_group_size = group_size;
3475
3476 if (stub_group_size == 1)
3477 {
3478 /* Default values. */
3479 /* Thumb branch range is +-4MB has to be used as the default
3480 maximum size (a given section can contain both ARM and Thumb
3481 code, so the worst case has to be taken into account).
3482
3483 This value is 24K less than that, which allows for 2025
3484 12-byte stubs. If we exceed that, then we will fail to link.
3485 The user will have to relink with an explicit group size
3486 option. */
3487 stub_group_size = 4170000;
3488 }
3489
3490 group_sections (htab, stub_group_size, stubs_always_before_branch);
3491
3492 while (1)
3493 {
3494 bfd *input_bfd;
3495 unsigned int bfd_indx;
3496 asection *stub_sec;
3497
3498 for (input_bfd = info->input_bfds, bfd_indx = 0;
3499 input_bfd != NULL;
3500 input_bfd = input_bfd->link_next, bfd_indx++)
3501 {
3502 Elf_Internal_Shdr *symtab_hdr;
3503 asection *section;
3504 Elf_Internal_Sym *local_syms = NULL;
3505
3506 /* We'll need the symbol table in a second. */
3507 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3508 if (symtab_hdr->sh_info == 0)
3509 continue;
3510
3511 /* Walk over each section attached to the input bfd. */
3512 for (section = input_bfd->sections;
3513 section != NULL;
3514 section = section->next)
3515 {
3516 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3517
3518 /* If there aren't any relocs, then there's nothing more
3519 to do. */
3520 if ((section->flags & SEC_RELOC) == 0
3521 || section->reloc_count == 0
3522 || (section->flags & SEC_CODE) == 0)
3523 continue;
3524
3525 /* If this section is a link-once section that will be
3526 discarded, then don't create any stubs. */
3527 if (section->output_section == NULL
3528 || section->output_section->owner != output_bfd)
3529 continue;
3530
3531 /* Get the relocs. */
3532 internal_relocs
3533 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3534 NULL, info->keep_memory);
3535 if (internal_relocs == NULL)
3536 goto error_ret_free_local;
3537
3538 /* Now examine each relocation. */
3539 irela = internal_relocs;
3540 irelaend = irela + section->reloc_count;
3541 for (; irela < irelaend; irela++)
3542 {
3543 unsigned int r_type, r_indx;
3544 enum elf32_arm_stub_type stub_type;
3545 struct elf32_arm_stub_hash_entry *stub_entry;
3546 asection *sym_sec;
3547 bfd_vma sym_value;
3548 bfd_vma destination;
3549 struct elf32_arm_link_hash_entry *hash;
3550 const char *sym_name;
3551 char *stub_name;
3552 const asection *id_sec;
3553 unsigned char st_type;
3554
3555 r_type = ELF32_R_TYPE (irela->r_info);
3556 r_indx = ELF32_R_SYM (irela->r_info);
3557
3558 if (r_type >= (unsigned int) R_ARM_max)
3559 {
3560 bfd_set_error (bfd_error_bad_value);
3561 error_ret_free_internal:
3562 if (elf_section_data (section)->relocs == NULL)
3563 free (internal_relocs);
3564 goto error_ret_free_local;
3565 }
3566
3567 /* Only look for stubs on call instructions. */
3568 if ((r_type != (unsigned int) R_ARM_CALL)
3569 && (r_type != (unsigned int) R_ARM_THM_CALL))
3570 continue;
3571
3572 /* Now determine the call target, its name, value,
3573 section. */
3574 sym_sec = NULL;
3575 sym_value = 0;
3576 destination = 0;
3577 hash = NULL;
3578 sym_name = NULL;
3579 if (r_indx < symtab_hdr->sh_info)
3580 {
3581 /* It's a local symbol. */
3582 Elf_Internal_Sym *sym;
3583 Elf_Internal_Shdr *hdr;
3584
3585 if (local_syms == NULL)
3586 {
3587 local_syms
3588 = (Elf_Internal_Sym *) symtab_hdr->contents;
3589 if (local_syms == NULL)
3590 local_syms
3591 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3592 symtab_hdr->sh_info, 0,
3593 NULL, NULL, NULL);
3594 if (local_syms == NULL)
3595 goto error_ret_free_internal;
3596 }
3597
3598 sym = local_syms + r_indx;
3599 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3600 sym_sec = hdr->bfd_section;
3601 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3602 sym_value = sym->st_value;
3603 destination = (sym_value + irela->r_addend
3604 + sym_sec->output_offset
3605 + sym_sec->output_section->vma);
3606 st_type = ELF_ST_TYPE (sym->st_info);
3607 sym_name
3608 = bfd_elf_string_from_elf_section (input_bfd,
3609 symtab_hdr->sh_link,
3610 sym->st_name);
3611 }
3612 else
3613 {
3614 /* It's an external symbol. */
3615 int e_indx;
3616
3617 e_indx = r_indx - symtab_hdr->sh_info;
3618 hash = ((struct elf32_arm_link_hash_entry *)
3619 elf_sym_hashes (input_bfd)[e_indx]);
3620
3621 while (hash->root.root.type == bfd_link_hash_indirect
3622 || hash->root.root.type == bfd_link_hash_warning)
3623 hash = ((struct elf32_arm_link_hash_entry *)
3624 hash->root.root.u.i.link);
3625
3626 if (hash->root.root.type == bfd_link_hash_defined
3627 || hash->root.root.type == bfd_link_hash_defweak)
3628 {
3629 sym_sec = hash->root.root.u.def.section;
3630 sym_value = hash->root.root.u.def.value;
3631 if (sym_sec->output_section != NULL)
3632 destination = (sym_value + irela->r_addend
3633 + sym_sec->output_offset
3634 + sym_sec->output_section->vma);
3635 }
3636 else if (hash->root.root.type == bfd_link_hash_undefweak
3637 || hash->root.root.type == bfd_link_hash_undefined)
3638 /* For a shared library, these will need a PLT stub,
3639 which is treated separately.
3640 For absolute code, they cannot be handled. */
3641 continue;
3642 else
3643 {
3644 bfd_set_error (bfd_error_bad_value);
3645 goto error_ret_free_internal;
3646 }
3647 st_type = ELF_ST_TYPE (hash->root.type);
3648 sym_name = hash->root.root.root.string;
3649 }
3650
3651 /* Determine what (if any) linker stub is needed. */
3652 stub_type = arm_type_of_stub (info, section, irela, st_type,
3653 hash, destination, sym_sec,
3654 input_bfd, sym_name);
3655 if (stub_type == arm_stub_none)
3656 continue;
3657
3658 /* Support for grouping stub sections. */
3659 id_sec = htab->stub_group[section->id].link_sec;
3660
3661 /* Get the name of this stub. */
3662 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, irela);
3663 if (!stub_name)
3664 goto error_ret_free_internal;
3665
3666 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
3667 stub_name,
3668 FALSE, FALSE);
3669 if (stub_entry != NULL)
3670 {
3671 /* The proper stub has already been created. */
3672 free (stub_name);
3673 continue;
3674 }
3675
3676 stub_entry = elf32_arm_add_stub (stub_name, section, htab);
3677 if (stub_entry == NULL)
3678 {
3679 free (stub_name);
3680 goto error_ret_free_internal;
3681 }
3682
3683 stub_entry->target_value = sym_value;
3684 stub_entry->target_section = sym_sec;
3685 stub_entry->stub_type = stub_type;
3686 stub_entry->h = hash;
3687 stub_entry->st_type = st_type;
3688
3689 if (sym_name == NULL)
3690 sym_name = "unnamed";
3691 stub_entry->output_name
3692 = bfd_alloc (htab->stub_bfd,
3693 sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
3694 + strlen (sym_name));
3695 if (stub_entry->output_name == NULL)
3696 {
3697 free (stub_name);
3698 goto error_ret_free_internal;
3699 }
3700
3701 /* For historical reasons, use the existing names for
3702 ARM-to-Thumb and Thumb-to-ARM stubs. */
3703 if (r_type == (unsigned int) R_ARM_THM_CALL
3704 && st_type != STT_ARM_TFUNC)
3705 sprintf (stub_entry->output_name, THUMB2ARM_GLUE_ENTRY_NAME,
3706 sym_name);
3707 else if (r_type == (unsigned int) R_ARM_CALL
3708 && st_type == STT_ARM_TFUNC)
3709 sprintf (stub_entry->output_name, ARM2THUMB_GLUE_ENTRY_NAME,
3710 sym_name);
3711 else
3712 sprintf (stub_entry->output_name, STUB_ENTRY_NAME,
3713 sym_name);
3714
3715 stub_changed = TRUE;
3716 }
3717
3718 /* We're done with the internal relocs, free them. */
3719 if (elf_section_data (section)->relocs == NULL)
3720 free (internal_relocs);
3721 }
3722 }
3723
3724 if (!stub_changed)
3725 break;
3726
3727 /* OK, we've added some stubs. Find out the new size of the
3728 stub sections. */
3729 for (stub_sec = htab->stub_bfd->sections;
3730 stub_sec != NULL;
3731 stub_sec = stub_sec->next)
3732 stub_sec->size = 0;
3733
3734 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
3735
3736 /* Ask the linker to do its stuff. */
3737 (*htab->layout_sections_again) ();
3738 stub_changed = FALSE;
3739 }
3740
3741 return TRUE;
3742
3743 error_ret_free_local:
3744 return FALSE;
3745 }
3746
3747 /* Build all the stubs associated with the current output file. The
3748 stubs are kept in a hash table attached to the main linker hash
3749 table. We also set up the .plt entries for statically linked PIC
3750 functions here. This function is called via arm_elf_finish in the
3751 linker. */
3752
3753 bfd_boolean
3754 elf32_arm_build_stubs (struct bfd_link_info *info)
3755 {
3756 asection *stub_sec;
3757 struct bfd_hash_table *table;
3758 struct elf32_arm_link_hash_table *htab;
3759
3760 htab = elf32_arm_hash_table (info);
3761
3762 for (stub_sec = htab->stub_bfd->sections;
3763 stub_sec != NULL;
3764 stub_sec = stub_sec->next)
3765 {
3766 bfd_size_type size;
3767
3768 /* Ignore non-stub sections. */
3769 if (!strstr (stub_sec->name, STUB_SUFFIX))
3770 continue;
3771
3772 /* Allocate memory to hold the linker stubs. */
3773 size = stub_sec->size;
3774 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3775 if (stub_sec->contents == NULL && size != 0)
3776 return FALSE;
3777 stub_sec->size = 0;
3778 }
3779
3780 /* Build the stubs as directed by the stub hash table. */
3781 table = &htab->stub_hash_table;
3782 bfd_hash_traverse (table, arm_build_one_stub, info);
3783
3784 return TRUE;
3785 }
3786
3787 /* Locate the Thumb encoded calling stub for NAME. */
3788
3789 static struct elf_link_hash_entry *
3790 find_thumb_glue (struct bfd_link_info *link_info,
3791 const char *name,
3792 char **error_message)
3793 {
3794 char *tmp_name;
3795 struct elf_link_hash_entry *hash;
3796 struct elf32_arm_link_hash_table *hash_table;
3797
3798 /* We need a pointer to the armelf specific hash table. */
3799 hash_table = elf32_arm_hash_table (link_info);
3800
3801 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
3802 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
3803
3804 BFD_ASSERT (tmp_name);
3805
3806 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
3807
3808 hash = elf_link_hash_lookup
3809 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
3810
3811 if (hash == NULL
3812 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
3813 tmp_name, name) == -1)
3814 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
3815
3816 free (tmp_name);
3817
3818 return hash;
3819 }
3820
3821 /* Locate the ARM encoded calling stub for NAME. */
3822
3823 static struct elf_link_hash_entry *
3824 find_arm_glue (struct bfd_link_info *link_info,
3825 const char *name,
3826 char **error_message)
3827 {
3828 char *tmp_name;
3829 struct elf_link_hash_entry *myh;
3830 struct elf32_arm_link_hash_table *hash_table;
3831
3832 /* We need a pointer to the elfarm specific hash table. */
3833 hash_table = elf32_arm_hash_table (link_info);
3834
3835 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
3836 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
3837
3838 BFD_ASSERT (tmp_name);
3839
3840 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
3841
3842 myh = elf_link_hash_lookup
3843 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
3844
3845 if (myh == NULL
3846 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
3847 tmp_name, name) == -1)
3848 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
3849
3850 free (tmp_name);
3851
3852 return myh;
3853 }
3854
3855 /* ARM->Thumb glue (static images):
3856
3857 .arm
3858 __func_from_arm:
3859 ldr r12, __func_addr
3860 bx r12
3861 __func_addr:
3862 .word func @ behave as if you saw a ARM_32 reloc.
3863
3864 (v5t static images)
3865 .arm
3866 __func_from_arm:
3867 ldr pc, __func_addr
3868 __func_addr:
3869 .word func @ behave as if you saw a ARM_32 reloc.
3870
3871 (relocatable images)
3872 .arm
3873 __func_from_arm:
3874 ldr r12, __func_offset
3875 add r12, r12, pc
3876 bx r12
3877 __func_offset:
3878 .word func - . */
3879
3880 #define ARM2THUMB_STATIC_GLUE_SIZE 12
3881 static const insn32 a2t1_ldr_insn = 0xe59fc000;
3882 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
3883 static const insn32 a2t3_func_addr_insn = 0x00000001;
3884
3885 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
3886 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
3887 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
3888
3889 #define ARM2THUMB_PIC_GLUE_SIZE 16
3890 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
3891 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
3892 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
3893
3894 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
3895
3896 .thumb .thumb
3897 .align 2 .align 2
3898 __func_from_thumb: __func_from_thumb:
3899 bx pc push {r6, lr}
3900 nop ldr r6, __func_addr
3901 .arm mov lr, pc
3902 b func bx r6
3903 .arm
3904 ;; back_to_thumb
3905 ldmia r13! {r6, lr}
3906 bx lr
3907 __func_addr:
3908 .word func */
3909
3910 #define THUMB2ARM_GLUE_SIZE 8
3911 static const insn16 t2a1_bx_pc_insn = 0x4778;
3912 static const insn16 t2a2_noop_insn = 0x46c0;
3913 static const insn32 t2a3_b_insn = 0xea000000;
3914
3915 #define VFP11_ERRATUM_VENEER_SIZE 8
3916
3917 #define ARM_BX_VENEER_SIZE 12
3918 static const insn32 armbx1_tst_insn = 0xe3100001;
3919 static const insn32 armbx2_moveq_insn = 0x01a0f000;
3920 static const insn32 armbx3_bx_insn = 0xe12fff10;
3921
3922 #ifndef ELFARM_NABI_C_INCLUDED
3923 static void
3924 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
3925 {
3926 asection * s;
3927 bfd_byte * contents;
3928
3929 if (size == 0)
3930 return;
3931
3932 BFD_ASSERT (abfd != NULL);
3933
3934 s = bfd_get_section_by_name (abfd, name);
3935 BFD_ASSERT (s != NULL);
3936
3937 contents = bfd_alloc (abfd, size);
3938
3939 BFD_ASSERT (s->size == size);
3940 s->contents = contents;
3941 }
3942
3943 bfd_boolean
3944 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
3945 {
3946 struct elf32_arm_link_hash_table * globals;
3947
3948 globals = elf32_arm_hash_table (info);
3949 BFD_ASSERT (globals != NULL);
3950
3951 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3952 globals->arm_glue_size,
3953 ARM2THUMB_GLUE_SECTION_NAME);
3954
3955 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3956 globals->thumb_glue_size,
3957 THUMB2ARM_GLUE_SECTION_NAME);
3958
3959 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3960 globals->vfp11_erratum_glue_size,
3961 VFP11_ERRATUM_VENEER_SECTION_NAME);
3962
3963 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3964 globals->bx_glue_size,
3965 ARM_BX_GLUE_SECTION_NAME);
3966
3967 return TRUE;
3968 }
3969
3970 /* Allocate space and symbols for calling a Thumb function from Arm mode.
3971 returns the symbol identifying the stub. */
3972
3973 static struct elf_link_hash_entry *
3974 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
3975 struct elf_link_hash_entry * h)
3976 {
3977 const char * name = h->root.root.string;
3978 asection * s;
3979 char * tmp_name;
3980 struct elf_link_hash_entry * myh;
3981 struct bfd_link_hash_entry * bh;
3982 struct elf32_arm_link_hash_table * globals;
3983 bfd_vma val;
3984 bfd_size_type size;
3985
3986 globals = elf32_arm_hash_table (link_info);
3987
3988 BFD_ASSERT (globals != NULL);
3989 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
3990
3991 s = bfd_get_section_by_name
3992 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
3993
3994 BFD_ASSERT (s != NULL);
3995
3996 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
3997
3998 BFD_ASSERT (tmp_name);
3999
4000 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
4001
4002 myh = elf_link_hash_lookup
4003 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
4004
4005 if (myh != NULL)
4006 {
4007 /* We've already seen this guy. */
4008 free (tmp_name);
4009 return myh;
4010 }
4011
4012 /* The only trick here is using hash_table->arm_glue_size as the value.
4013 Even though the section isn't allocated yet, this is where we will be
4014 putting it. The +1 on the value marks that the stub has not been
4015 output yet - not that it is a Thumb function. */
4016 bh = NULL;
4017 val = globals->arm_glue_size + 1;
4018 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4019 tmp_name, BSF_GLOBAL, s, val,
4020 NULL, TRUE, FALSE, &bh);
4021
4022 myh = (struct elf_link_hash_entry *) bh;
4023 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4024 myh->forced_local = 1;
4025
4026 free (tmp_name);
4027
4028 if (link_info->shared || globals->root.is_relocatable_executable
4029 || globals->pic_veneer)
4030 size = ARM2THUMB_PIC_GLUE_SIZE;
4031 else if (globals->use_blx)
4032 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
4033 else
4034 size = ARM2THUMB_STATIC_GLUE_SIZE;
4035
4036 s->size += size;
4037 globals->arm_glue_size += size;
4038
4039 return myh;
4040 }
4041
4042 static void
4043 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
4044 struct elf_link_hash_entry *h)
4045 {
4046 const char *name = h->root.root.string;
4047 asection *s;
4048 char *tmp_name;
4049 struct elf_link_hash_entry *myh;
4050 struct bfd_link_hash_entry *bh;
4051 struct elf32_arm_link_hash_table *hash_table;
4052 bfd_vma val;
4053
4054 hash_table = elf32_arm_hash_table (link_info);
4055
4056 BFD_ASSERT (hash_table != NULL);
4057 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
4058
4059 s = bfd_get_section_by_name
4060 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
4061
4062 BFD_ASSERT (s != NULL);
4063
4064 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4065 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
4066
4067 BFD_ASSERT (tmp_name);
4068
4069 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
4070
4071 myh = elf_link_hash_lookup
4072 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
4073
4074 if (myh != NULL)
4075 {
4076 /* We've already seen this guy. */
4077 free (tmp_name);
4078 return;
4079 }
4080
4081 /* The only trick here is using hash_table->thumb_glue_size as the value.
4082 Even though the section isn't allocated yet, this is where we will be
4083 putting it. The +1 on the value marks that the stub has not been
4084 output yet - not that it is a Thumb function. */
4085 bh = NULL;
4086 val = hash_table->thumb_glue_size + 1;
4087 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4088 tmp_name, BSF_GLOBAL, s, val,
4089 NULL, TRUE, FALSE, &bh);
4090
4091 /* If we mark it 'Thumb', the disassembler will do a better job. */
4092 myh = (struct elf_link_hash_entry *) bh;
4093 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
4094 myh->forced_local = 1;
4095
4096 free (tmp_name);
4097
4098 #define CHANGE_TO_ARM "__%s_change_to_arm"
4099 #define BACK_FROM_ARM "__%s_back_from_arm"
4100
4101 /* Allocate another symbol to mark where we switch to Arm mode. */
4102 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4103 + strlen (CHANGE_TO_ARM) + 1);
4104
4105 BFD_ASSERT (tmp_name);
4106
4107 sprintf (tmp_name, CHANGE_TO_ARM, name);
4108
4109 bh = NULL;
4110 val = hash_table->thumb_glue_size + 4,
4111 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4112 tmp_name, BSF_LOCAL, s, val,
4113 NULL, TRUE, FALSE, &bh);
4114
4115 free (tmp_name);
4116
4117 s->size += THUMB2ARM_GLUE_SIZE;
4118 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
4119 }
4120
4121
4122 /* Allocate space for ARMv4 BX veneers. */
4123
4124 static void
4125 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
4126 {
4127 asection * s;
4128 struct elf32_arm_link_hash_table *globals;
4129 char *tmp_name;
4130 struct elf_link_hash_entry *myh;
4131 struct bfd_link_hash_entry *bh;
4132 bfd_vma val;
4133
4134 /* BX PC does not need a veneer. */
4135 if (reg == 15)
4136 return;
4137
4138 globals = elf32_arm_hash_table (link_info);
4139
4140 BFD_ASSERT (globals != NULL);
4141 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4142
4143 /* Check if this veneer has already been allocated. */
4144 if (globals->bx_glue_offset[reg])
4145 return;
4146
4147 s = bfd_get_section_by_name
4148 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
4149
4150 BFD_ASSERT (s != NULL);
4151
4152 /* Add symbol for veneer. */
4153 tmp_name = bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
4154
4155 BFD_ASSERT (tmp_name);
4156
4157 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
4158
4159 myh = elf_link_hash_lookup
4160 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
4161
4162 BFD_ASSERT (myh == NULL);
4163
4164 bh = NULL;
4165 val = globals->bx_glue_size;
4166 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4167 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4168 NULL, TRUE, FALSE, &bh);
4169
4170 myh = (struct elf_link_hash_entry *) bh;
4171 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4172 myh->forced_local = 1;
4173
4174 s->size += ARM_BX_VENEER_SIZE;
4175 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
4176 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
4177 }
4178
4179
4180 /* Add an entry to the code/data map for section SEC. */
4181
4182 static void
4183 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
4184 {
4185 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
4186 unsigned int newidx;
4187
4188 if (sec_data->map == NULL)
4189 {
4190 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
4191 sec_data->mapcount = 0;
4192 sec_data->mapsize = 1;
4193 }
4194
4195 newidx = sec_data->mapcount++;
4196
4197 if (sec_data->mapcount > sec_data->mapsize)
4198 {
4199 sec_data->mapsize *= 2;
4200 sec_data->map = bfd_realloc_or_free (sec_data->map, sec_data->mapsize
4201 * sizeof (elf32_arm_section_map));
4202 }
4203
4204 if (sec_data->map)
4205 {
4206 sec_data->map[newidx].vma = vma;
4207 sec_data->map[newidx].type = type;
4208 }
4209 }
4210
4211
4212 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
4213 veneers are handled for now. */
4214
4215 static bfd_vma
4216 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
4217 elf32_vfp11_erratum_list *branch,
4218 bfd *branch_bfd,
4219 asection *branch_sec,
4220 unsigned int offset)
4221 {
4222 asection *s;
4223 struct elf32_arm_link_hash_table *hash_table;
4224 char *tmp_name;
4225 struct elf_link_hash_entry *myh;
4226 struct bfd_link_hash_entry *bh;
4227 bfd_vma val;
4228 struct _arm_elf_section_data *sec_data;
4229 int errcount;
4230 elf32_vfp11_erratum_list *newerr;
4231
4232 hash_table = elf32_arm_hash_table (link_info);
4233
4234 BFD_ASSERT (hash_table != NULL);
4235 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
4236
4237 s = bfd_get_section_by_name
4238 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
4239
4240 sec_data = elf32_arm_section_data (s);
4241
4242 BFD_ASSERT (s != NULL);
4243
4244 tmp_name = bfd_malloc ((bfd_size_type) strlen
4245 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
4246
4247 BFD_ASSERT (tmp_name);
4248
4249 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
4250 hash_table->num_vfp11_fixes);
4251
4252 myh = elf_link_hash_lookup
4253 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4254
4255 BFD_ASSERT (myh == NULL);
4256
4257 bh = NULL;
4258 val = hash_table->vfp11_erratum_glue_size;
4259 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4260 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4261 NULL, TRUE, FALSE, &bh);
4262
4263 myh = (struct elf_link_hash_entry *) bh;
4264 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4265 myh->forced_local = 1;
4266
4267 /* Link veneer back to calling location. */
4268 errcount = ++(sec_data->erratumcount);
4269 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
4270
4271 newerr->type = VFP11_ERRATUM_ARM_VENEER;
4272 newerr->vma = -1;
4273 newerr->u.v.branch = branch;
4274 newerr->u.v.id = hash_table->num_vfp11_fixes;
4275 branch->u.b.veneer = newerr;
4276
4277 newerr->next = sec_data->erratumlist;
4278 sec_data->erratumlist = newerr;
4279
4280 /* A symbol for the return from the veneer. */
4281 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
4282 hash_table->num_vfp11_fixes);
4283
4284 myh = elf_link_hash_lookup
4285 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4286
4287 if (myh != NULL)
4288 abort ();
4289
4290 bh = NULL;
4291 val = offset + 4;
4292 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
4293 branch_sec, val, NULL, TRUE, FALSE, &bh);
4294
4295 myh = (struct elf_link_hash_entry *) bh;
4296 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4297 myh->forced_local = 1;
4298
4299 free (tmp_name);
4300
4301 /* Generate a mapping symbol for the veneer section, and explicitly add an
4302 entry for that symbol to the code/data map for the section. */
4303 if (hash_table->vfp11_erratum_glue_size == 0)
4304 {
4305 bh = NULL;
4306 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
4307 ever requires this erratum fix. */
4308 _bfd_generic_link_add_one_symbol (link_info,
4309 hash_table->bfd_of_glue_owner, "$a",
4310 BSF_LOCAL, s, 0, NULL,
4311 TRUE, FALSE, &bh);
4312
4313 myh = (struct elf_link_hash_entry *) bh;
4314 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
4315 myh->forced_local = 1;
4316
4317 /* The elf32_arm_init_maps function only cares about symbols from input
4318 BFDs. We must make a note of this generated mapping symbol
4319 ourselves so that code byteswapping works properly in
4320 elf32_arm_write_section. */
4321 elf32_arm_section_map_add (s, 'a', 0);
4322 }
4323
4324 s->size += VFP11_ERRATUM_VENEER_SIZE;
4325 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
4326 hash_table->num_vfp11_fixes++;
4327
4328 /* The offset of the veneer. */
4329 return val;
4330 }
4331
4332 /* Note: we do not include the flag SEC_LINKER_CREATED, as that
4333 would prevent elf_link_input_bfd() from processing the contents
4334 of the section. */
4335 #define ARM_GLUE_SECTION_FLAGS \
4336 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY)
4337
4338 /* Create a fake section for use by the ARM backend of the linker. */
4339
4340 static bfd_boolean
4341 arm_make_glue_section (bfd * abfd, const char * name)
4342 {
4343 asection * sec;
4344
4345 sec = bfd_get_section_by_name (abfd, name);
4346 if (sec != NULL)
4347 /* Already made. */
4348 return TRUE;
4349
4350 sec = bfd_make_section_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
4351
4352 if (sec == NULL
4353 || !bfd_set_section_alignment (abfd, sec, 2))
4354 return FALSE;
4355
4356 /* Set the gc mark to prevent the section from being removed by garbage
4357 collection, despite the fact that no relocs refer to this section. */
4358 sec->gc_mark = 1;
4359
4360 return TRUE;
4361 }
4362
4363 /* Add the glue sections to ABFD. This function is called from the
4364 linker scripts in ld/emultempl/{armelf}.em. */
4365
4366 bfd_boolean
4367 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
4368 struct bfd_link_info *info)
4369 {
4370 /* If we are only performing a partial
4371 link do not bother adding the glue. */
4372 if (info->relocatable)
4373 return TRUE;
4374
4375 /* Linker stubs don't need glue. */
4376 if (!strcmp (abfd->filename, "linker stubs"))
4377 return TRUE;
4378
4379 return arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
4380 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
4381 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
4382 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
4383 }
4384
4385 /* Select a BFD to be used to hold the sections used by the glue code.
4386 This function is called from the linker scripts in ld/emultempl/
4387 {armelf/pe}.em. */
4388
4389 bfd_boolean
4390 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
4391 {
4392 struct elf32_arm_link_hash_table *globals;
4393
4394 /* If we are only performing a partial link
4395 do not bother getting a bfd to hold the glue. */
4396 if (info->relocatable)
4397 return TRUE;
4398
4399 /* Make sure we don't attach the glue sections to a dynamic object. */
4400 BFD_ASSERT (!(abfd->flags & DYNAMIC));
4401
4402 globals = elf32_arm_hash_table (info);
4403
4404 BFD_ASSERT (globals != NULL);
4405
4406 if (globals->bfd_of_glue_owner != NULL)
4407 return TRUE;
4408
4409 /* Save the bfd for later use. */
4410 globals->bfd_of_glue_owner = abfd;
4411
4412 return TRUE;
4413 }
4414
4415 static void
4416 check_use_blx (struct elf32_arm_link_hash_table *globals)
4417 {
4418 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4419 Tag_CPU_arch) > 2)
4420 globals->use_blx = 1;
4421 }
4422
4423 bfd_boolean
4424 bfd_elf32_arm_process_before_allocation (bfd *abfd,
4425 struct bfd_link_info *link_info)
4426 {
4427 Elf_Internal_Shdr *symtab_hdr;
4428 Elf_Internal_Rela *internal_relocs = NULL;
4429 Elf_Internal_Rela *irel, *irelend;
4430 bfd_byte *contents = NULL;
4431
4432 asection *sec;
4433 struct elf32_arm_link_hash_table *globals;
4434
4435 /* If we are only performing a partial link do not bother
4436 to construct any glue. */
4437 if (link_info->relocatable)
4438 return TRUE;
4439
4440 /* Here we have a bfd that is to be included on the link. We have a
4441 hook to do reloc rummaging, before section sizes are nailed down. */
4442 globals = elf32_arm_hash_table (link_info);
4443
4444 BFD_ASSERT (globals != NULL);
4445
4446 check_use_blx (globals);
4447
4448 if (globals->byteswap_code && !bfd_big_endian (abfd))
4449 {
4450 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
4451 abfd);
4452 return FALSE;
4453 }
4454
4455 /* PR 5398: If we have not decided to include any loadable sections in
4456 the output then we will not have a glue owner bfd. This is OK, it
4457 just means that there is nothing else for us to do here. */
4458 if (globals->bfd_of_glue_owner == NULL)
4459 return TRUE;
4460
4461 /* Rummage around all the relocs and map the glue vectors. */
4462 sec = abfd->sections;
4463
4464 if (sec == NULL)
4465 return TRUE;
4466
4467 for (; sec != NULL; sec = sec->next)
4468 {
4469 if (sec->reloc_count == 0)
4470 continue;
4471
4472 if ((sec->flags & SEC_EXCLUDE) != 0)
4473 continue;
4474
4475 symtab_hdr = & elf_symtab_hdr (abfd);
4476
4477 /* Load the relocs. */
4478 internal_relocs
4479 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
4480
4481 if (internal_relocs == NULL)
4482 goto error_return;
4483
4484 irelend = internal_relocs + sec->reloc_count;
4485 for (irel = internal_relocs; irel < irelend; irel++)
4486 {
4487 long r_type;
4488 unsigned long r_index;
4489
4490 struct elf_link_hash_entry *h;
4491
4492 r_type = ELF32_R_TYPE (irel->r_info);
4493 r_index = ELF32_R_SYM (irel->r_info);
4494
4495 /* These are the only relocation types we care about. */
4496 if ( r_type != R_ARM_PC24
4497 && r_type != R_ARM_PLT32
4498 && r_type != R_ARM_JUMP24
4499 && r_type != R_ARM_THM_JUMP24
4500 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
4501 continue;
4502
4503 /* Get the section contents if we haven't done so already. */
4504 if (contents == NULL)
4505 {
4506 /* Get cached copy if it exists. */
4507 if (elf_section_data (sec)->this_hdr.contents != NULL)
4508 contents = elf_section_data (sec)->this_hdr.contents;
4509 else
4510 {
4511 /* Go get them off disk. */
4512 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
4513 goto error_return;
4514 }
4515 }
4516
4517 if (r_type == R_ARM_V4BX)
4518 {
4519 int reg;
4520
4521 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
4522 record_arm_bx_glue (link_info, reg);
4523 continue;
4524 }
4525
4526 /* If the relocation is not against a symbol it cannot concern us. */
4527 h = NULL;
4528
4529 /* We don't care about local symbols. */
4530 if (r_index < symtab_hdr->sh_info)
4531 continue;
4532
4533 /* This is an external symbol. */
4534 r_index -= symtab_hdr->sh_info;
4535 h = (struct elf_link_hash_entry *)
4536 elf_sym_hashes (abfd)[r_index];
4537
4538 /* If the relocation is against a static symbol it must be within
4539 the current section and so cannot be a cross ARM/Thumb relocation. */
4540 if (h == NULL)
4541 continue;
4542
4543 /* If the call will go through a PLT entry then we do not need
4544 glue. */
4545 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
4546 continue;
4547
4548 switch (r_type)
4549 {
4550 case R_ARM_PC24:
4551 case R_ARM_PLT32:
4552 case R_ARM_JUMP24:
4553 /* This one is a call from arm code. We need to look up
4554 the target of the call. If it is a thumb target, we
4555 insert glue. */
4556 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
4557 && !(r_type == R_ARM_CALL && globals->use_blx))
4558 record_arm_to_thumb_glue (link_info, h);
4559 break;
4560
4561 case R_ARM_THM_JUMP24:
4562 /* This one is a call from thumb code. We look
4563 up the target of the call. If it is not a thumb
4564 target, we insert glue. */
4565 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC
4566 && !(globals->use_blx && r_type == R_ARM_THM_CALL)
4567 && h->root.type != bfd_link_hash_undefweak)
4568 record_thumb_to_arm_glue (link_info, h);
4569 break;
4570
4571 default:
4572 abort ();
4573 }
4574 }
4575
4576 if (contents != NULL
4577 && elf_section_data (sec)->this_hdr.contents != contents)
4578 free (contents);
4579 contents = NULL;
4580
4581 if (internal_relocs != NULL
4582 && elf_section_data (sec)->relocs != internal_relocs)
4583 free (internal_relocs);
4584 internal_relocs = NULL;
4585 }
4586
4587 return TRUE;
4588
4589 error_return:
4590 if (contents != NULL
4591 && elf_section_data (sec)->this_hdr.contents != contents)
4592 free (contents);
4593 if (internal_relocs != NULL
4594 && elf_section_data (sec)->relocs != internal_relocs)
4595 free (internal_relocs);
4596
4597 return FALSE;
4598 }
4599 #endif
4600
4601
4602 /* Initialise maps of ARM/Thumb/data for input BFDs. */
4603
4604 void
4605 bfd_elf32_arm_init_maps (bfd *abfd)
4606 {
4607 Elf_Internal_Sym *isymbuf;
4608 Elf_Internal_Shdr *hdr;
4609 unsigned int i, localsyms;
4610
4611 /* PR 7093: Make sure that we are dealing with an arm elf binary. */
4612 if (! is_arm_elf (abfd))
4613 return;
4614
4615 if ((abfd->flags & DYNAMIC) != 0)
4616 return;
4617
4618 hdr = & elf_symtab_hdr (abfd);
4619 localsyms = hdr->sh_info;
4620
4621 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4622 should contain the number of local symbols, which should come before any
4623 global symbols. Mapping symbols are always local. */
4624 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
4625 NULL);
4626
4627 /* No internal symbols read? Skip this BFD. */
4628 if (isymbuf == NULL)
4629 return;
4630
4631 for (i = 0; i < localsyms; i++)
4632 {
4633 Elf_Internal_Sym *isym = &isymbuf[i];
4634 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4635 const char *name;
4636
4637 if (sec != NULL
4638 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4639 {
4640 name = bfd_elf_string_from_elf_section (abfd,
4641 hdr->sh_link, isym->st_name);
4642
4643 if (bfd_is_arm_special_symbol_name (name,
4644 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
4645 elf32_arm_section_map_add (sec, name[1], isym->st_value);
4646 }
4647 }
4648 }
4649
4650
4651 void
4652 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
4653 {
4654 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
4655 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
4656
4657 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
4658 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
4659 {
4660 switch (globals->vfp11_fix)
4661 {
4662 case BFD_ARM_VFP11_FIX_DEFAULT:
4663 case BFD_ARM_VFP11_FIX_NONE:
4664 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4665 break;
4666
4667 default:
4668 /* Give a warning, but do as the user requests anyway. */
4669 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
4670 "workaround is not necessary for target architecture"), obfd);
4671 }
4672 }
4673 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
4674 /* For earlier architectures, we might need the workaround, but do not
4675 enable it by default. If users is running with broken hardware, they
4676 must enable the erratum fix explicitly. */
4677 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4678 }
4679
4680
4681 enum bfd_arm_vfp11_pipe
4682 {
4683 VFP11_FMAC,
4684 VFP11_LS,
4685 VFP11_DS,
4686 VFP11_BAD
4687 };
4688
4689 /* Return a VFP register number. This is encoded as RX:X for single-precision
4690 registers, or X:RX for double-precision registers, where RX is the group of
4691 four bits in the instruction encoding and X is the single extension bit.
4692 RX and X fields are specified using their lowest (starting) bit. The return
4693 value is:
4694
4695 0...31: single-precision registers s0...s31
4696 32...63: double-precision registers d0...d31.
4697
4698 Although X should be zero for VFP11 (encoding d0...d15 only), we might
4699 encounter VFP3 instructions, so we allow the full range for DP registers. */
4700
4701 static unsigned int
4702 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
4703 unsigned int x)
4704 {
4705 if (is_double)
4706 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
4707 else
4708 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
4709 }
4710
4711 /* Set bits in *WMASK according to a register number REG as encoded by
4712 bfd_arm_vfp11_regno(). Ignore d16-d31. */
4713
4714 static void
4715 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
4716 {
4717 if (reg < 32)
4718 *wmask |= 1 << reg;
4719 else if (reg < 48)
4720 *wmask |= 3 << ((reg - 32) * 2);
4721 }
4722
4723 /* Return TRUE if WMASK overwrites anything in REGS. */
4724
4725 static bfd_boolean
4726 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
4727 {
4728 int i;
4729
4730 for (i = 0; i < numregs; i++)
4731 {
4732 unsigned int reg = regs[i];
4733
4734 if (reg < 32 && (wmask & (1 << reg)) != 0)
4735 return TRUE;
4736
4737 reg -= 32;
4738
4739 if (reg >= 16)
4740 continue;
4741
4742 if ((wmask & (3 << (reg * 2))) != 0)
4743 return TRUE;
4744 }
4745
4746 return FALSE;
4747 }
4748
4749 /* In this function, we're interested in two things: finding input registers
4750 for VFP data-processing instructions, and finding the set of registers which
4751 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
4752 hold the written set, so FLDM etc. are easy to deal with (we're only
4753 interested in 32 SP registers or 16 dp registers, due to the VFP version
4754 implemented by the chip in question). DP registers are marked by setting
4755 both SP registers in the write mask). */
4756
4757 static enum bfd_arm_vfp11_pipe
4758 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
4759 int *numregs)
4760 {
4761 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
4762 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
4763
4764 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
4765 {
4766 unsigned int pqrs;
4767 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
4768 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
4769
4770 pqrs = ((insn & 0x00800000) >> 20)
4771 | ((insn & 0x00300000) >> 19)
4772 | ((insn & 0x00000040) >> 6);
4773
4774 switch (pqrs)
4775 {
4776 case 0: /* fmac[sd]. */
4777 case 1: /* fnmac[sd]. */
4778 case 2: /* fmsc[sd]. */
4779 case 3: /* fnmsc[sd]. */
4780 pipe = VFP11_FMAC;
4781 bfd_arm_vfp11_write_mask (destmask, fd);
4782 regs[0] = fd;
4783 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4784 regs[2] = fm;
4785 *numregs = 3;
4786 break;
4787
4788 case 4: /* fmul[sd]. */
4789 case 5: /* fnmul[sd]. */
4790 case 6: /* fadd[sd]. */
4791 case 7: /* fsub[sd]. */
4792 pipe = VFP11_FMAC;
4793 goto vfp_binop;
4794
4795 case 8: /* fdiv[sd]. */
4796 pipe = VFP11_DS;
4797 vfp_binop:
4798 bfd_arm_vfp11_write_mask (destmask, fd);
4799 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4800 regs[1] = fm;
4801 *numregs = 2;
4802 break;
4803
4804 case 15: /* extended opcode. */
4805 {
4806 unsigned int extn = ((insn >> 15) & 0x1e)
4807 | ((insn >> 7) & 1);
4808
4809 switch (extn)
4810 {
4811 case 0: /* fcpy[sd]. */
4812 case 1: /* fabs[sd]. */
4813 case 2: /* fneg[sd]. */
4814 case 8: /* fcmp[sd]. */
4815 case 9: /* fcmpe[sd]. */
4816 case 10: /* fcmpz[sd]. */
4817 case 11: /* fcmpez[sd]. */
4818 case 16: /* fuito[sd]. */
4819 case 17: /* fsito[sd]. */
4820 case 24: /* ftoui[sd]. */
4821 case 25: /* ftouiz[sd]. */
4822 case 26: /* ftosi[sd]. */
4823 case 27: /* ftosiz[sd]. */
4824 /* These instructions will not bounce due to underflow. */
4825 *numregs = 0;
4826 pipe = VFP11_FMAC;
4827 break;
4828
4829 case 3: /* fsqrt[sd]. */
4830 /* fsqrt cannot underflow, but it can (perhaps) overwrite
4831 registers to cause the erratum in previous instructions. */
4832 bfd_arm_vfp11_write_mask (destmask, fd);
4833 pipe = VFP11_DS;
4834 break;
4835
4836 case 15: /* fcvt{ds,sd}. */
4837 {
4838 int rnum = 0;
4839
4840 bfd_arm_vfp11_write_mask (destmask, fd);
4841
4842 /* Only FCVTSD can underflow. */
4843 if ((insn & 0x100) != 0)
4844 regs[rnum++] = fm;
4845
4846 *numregs = rnum;
4847
4848 pipe = VFP11_FMAC;
4849 }
4850 break;
4851
4852 default:
4853 return VFP11_BAD;
4854 }
4855 }
4856 break;
4857
4858 default:
4859 return VFP11_BAD;
4860 }
4861 }
4862 /* Two-register transfer. */
4863 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
4864 {
4865 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
4866
4867 if ((insn & 0x100000) == 0)
4868 {
4869 if (is_double)
4870 bfd_arm_vfp11_write_mask (destmask, fm);
4871 else
4872 {
4873 bfd_arm_vfp11_write_mask (destmask, fm);
4874 bfd_arm_vfp11_write_mask (destmask, fm + 1);
4875 }
4876 }
4877
4878 pipe = VFP11_LS;
4879 }
4880 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
4881 {
4882 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
4883 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
4884
4885 switch (puw)
4886 {
4887 case 0: /* Two-reg transfer. We should catch these above. */
4888 abort ();
4889
4890 case 2: /* fldm[sdx]. */
4891 case 3:
4892 case 5:
4893 {
4894 unsigned int i, offset = insn & 0xff;
4895
4896 if (is_double)
4897 offset >>= 1;
4898
4899 for (i = fd; i < fd + offset; i++)
4900 bfd_arm_vfp11_write_mask (destmask, i);
4901 }
4902 break;
4903
4904 case 4: /* fld[sd]. */
4905 case 6:
4906 bfd_arm_vfp11_write_mask (destmask, fd);
4907 break;
4908
4909 default:
4910 return VFP11_BAD;
4911 }
4912
4913 pipe = VFP11_LS;
4914 }
4915 /* Single-register transfer. Note L==0. */
4916 else if ((insn & 0x0f100e10) == 0x0e000a10)
4917 {
4918 unsigned int opcode = (insn >> 21) & 7;
4919 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
4920
4921 switch (opcode)
4922 {
4923 case 0: /* fmsr/fmdlr. */
4924 case 1: /* fmdhr. */
4925 /* Mark fmdhr and fmdlr as writing to the whole of the DP
4926 destination register. I don't know if this is exactly right,
4927 but it is the conservative choice. */
4928 bfd_arm_vfp11_write_mask (destmask, fn);
4929 break;
4930
4931 case 7: /* fmxr. */
4932 break;
4933 }
4934
4935 pipe = VFP11_LS;
4936 }
4937
4938 return pipe;
4939 }
4940
4941
4942 static int elf32_arm_compare_mapping (const void * a, const void * b);
4943
4944
4945 /* Look for potentially-troublesome code sequences which might trigger the
4946 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
4947 (available from ARM) for details of the erratum. A short version is
4948 described in ld.texinfo. */
4949
4950 bfd_boolean
4951 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
4952 {
4953 asection *sec;
4954 bfd_byte *contents = NULL;
4955 int state = 0;
4956 int regs[3], numregs = 0;
4957 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
4958 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
4959
4960 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
4961 The states transition as follows:
4962
4963 0 -> 1 (vector) or 0 -> 2 (scalar)
4964 A VFP FMAC-pipeline instruction has been seen. Fill
4965 regs[0]..regs[numregs-1] with its input operands. Remember this
4966 instruction in 'first_fmac'.
4967
4968 1 -> 2
4969 Any instruction, except for a VFP instruction which overwrites
4970 regs[*].
4971
4972 1 -> 3 [ -> 0 ] or
4973 2 -> 3 [ -> 0 ]
4974 A VFP instruction has been seen which overwrites any of regs[*].
4975 We must make a veneer! Reset state to 0 before examining next
4976 instruction.
4977
4978 2 -> 0
4979 If we fail to match anything in state 2, reset to state 0 and reset
4980 the instruction pointer to the instruction after 'first_fmac'.
4981
4982 If the VFP11 vector mode is in use, there must be at least two unrelated
4983 instructions between anti-dependent VFP11 instructions to properly avoid
4984 triggering the erratum, hence the use of the extra state 1. */
4985
4986 /* If we are only performing a partial link do not bother
4987 to construct any glue. */
4988 if (link_info->relocatable)
4989 return TRUE;
4990
4991 /* Skip if this bfd does not correspond to an ELF image. */
4992 if (! is_arm_elf (abfd))
4993 return TRUE;
4994
4995 /* We should have chosen a fix type by the time we get here. */
4996 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
4997
4998 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
4999 return TRUE;
5000
5001 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5002 {
5003 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
5004 struct _arm_elf_section_data *sec_data;
5005
5006 /* If we don't have executable progbits, we're not interested in this
5007 section. Also skip if section is to be excluded. */
5008 if (elf_section_type (sec) != SHT_PROGBITS
5009 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
5010 || (sec->flags & SEC_EXCLUDE) != 0
5011 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
5012 continue;
5013
5014 sec_data = elf32_arm_section_data (sec);
5015
5016 if (sec_data->mapcount == 0)
5017 continue;
5018
5019 if (elf_section_data (sec)->this_hdr.contents != NULL)
5020 contents = elf_section_data (sec)->this_hdr.contents;
5021 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
5022 goto error_return;
5023
5024 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
5025 elf32_arm_compare_mapping);
5026
5027 for (span = 0; span < sec_data->mapcount; span++)
5028 {
5029 unsigned int span_start = sec_data->map[span].vma;
5030 unsigned int span_end = (span == sec_data->mapcount - 1)
5031 ? sec->size : sec_data->map[span + 1].vma;
5032 char span_type = sec_data->map[span].type;
5033
5034 /* FIXME: Only ARM mode is supported at present. We may need to
5035 support Thumb-2 mode also at some point. */
5036 if (span_type != 'a')
5037 continue;
5038
5039 for (i = span_start; i < span_end;)
5040 {
5041 unsigned int next_i = i + 4;
5042 unsigned int insn = bfd_big_endian (abfd)
5043 ? (contents[i] << 24)
5044 | (contents[i + 1] << 16)
5045 | (contents[i + 2] << 8)
5046 | contents[i + 3]
5047 : (contents[i + 3] << 24)
5048 | (contents[i + 2] << 16)
5049 | (contents[i + 1] << 8)
5050 | contents[i];
5051 unsigned int writemask = 0;
5052 enum bfd_arm_vfp11_pipe pipe;
5053
5054 switch (state)
5055 {
5056 case 0:
5057 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
5058 &numregs);
5059 /* I'm assuming the VFP11 erratum can trigger with denorm
5060 operands on either the FMAC or the DS pipeline. This might
5061 lead to slightly overenthusiastic veneer insertion. */
5062 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
5063 {
5064 state = use_vector ? 1 : 2;
5065 first_fmac = i;
5066 veneer_of_insn = insn;
5067 }
5068 break;
5069
5070 case 1:
5071 {
5072 int other_regs[3], other_numregs;
5073 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5074 other_regs,
5075 &other_numregs);
5076 if (pipe != VFP11_BAD
5077 && bfd_arm_vfp11_antidependency (writemask, regs,
5078 numregs))
5079 state = 3;
5080 else
5081 state = 2;
5082 }
5083 break;
5084
5085 case 2:
5086 {
5087 int other_regs[3], other_numregs;
5088 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5089 other_regs,
5090 &other_numregs);
5091 if (pipe != VFP11_BAD
5092 && bfd_arm_vfp11_antidependency (writemask, regs,
5093 numregs))
5094 state = 3;
5095 else
5096 {
5097 state = 0;
5098 next_i = first_fmac + 4;
5099 }
5100 }
5101 break;
5102
5103 case 3:
5104 abort (); /* Should be unreachable. */
5105 }
5106
5107 if (state == 3)
5108 {
5109 elf32_vfp11_erratum_list *newerr
5110 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
5111 int errcount;
5112
5113 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
5114
5115 newerr->u.b.vfp_insn = veneer_of_insn;
5116
5117 switch (span_type)
5118 {
5119 case 'a':
5120 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
5121 break;
5122
5123 default:
5124 abort ();
5125 }
5126
5127 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
5128 first_fmac);
5129
5130 newerr->vma = -1;
5131
5132 newerr->next = sec_data->erratumlist;
5133 sec_data->erratumlist = newerr;
5134
5135 state = 0;
5136 }
5137
5138 i = next_i;
5139 }
5140 }
5141
5142 if (contents != NULL
5143 && elf_section_data (sec)->this_hdr.contents != contents)
5144 free (contents);
5145 contents = NULL;
5146 }
5147
5148 return TRUE;
5149
5150 error_return:
5151 if (contents != NULL
5152 && elf_section_data (sec)->this_hdr.contents != contents)
5153 free (contents);
5154
5155 return FALSE;
5156 }
5157
5158 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
5159 after sections have been laid out, using specially-named symbols. */
5160
5161 void
5162 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
5163 struct bfd_link_info *link_info)
5164 {
5165 asection *sec;
5166 struct elf32_arm_link_hash_table *globals;
5167 char *tmp_name;
5168
5169 if (link_info->relocatable)
5170 return;
5171
5172 /* Skip if this bfd does not correspond to an ELF image. */
5173 if (! is_arm_elf (abfd))
5174 return;
5175
5176 globals = elf32_arm_hash_table (link_info);
5177
5178 tmp_name = bfd_malloc ((bfd_size_type) strlen
5179 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
5180
5181 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5182 {
5183 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
5184 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
5185
5186 for (; errnode != NULL; errnode = errnode->next)
5187 {
5188 struct elf_link_hash_entry *myh;
5189 bfd_vma vma;
5190
5191 switch (errnode->type)
5192 {
5193 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
5194 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
5195 /* Find veneer symbol. */
5196 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
5197 errnode->u.b.veneer->u.v.id);
5198
5199 myh = elf_link_hash_lookup
5200 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5201
5202 if (myh == NULL)
5203 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5204 "`%s'"), abfd, tmp_name);
5205
5206 vma = myh->root.u.def.section->output_section->vma
5207 + myh->root.u.def.section->output_offset
5208 + myh->root.u.def.value;
5209
5210 errnode->u.b.veneer->vma = vma;
5211 break;
5212
5213 case VFP11_ERRATUM_ARM_VENEER:
5214 case VFP11_ERRATUM_THUMB_VENEER:
5215 /* Find return location. */
5216 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
5217 errnode->u.v.id);
5218
5219 myh = elf_link_hash_lookup
5220 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5221
5222 if (myh == NULL)
5223 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5224 "`%s'"), abfd, tmp_name);
5225
5226 vma = myh->root.u.def.section->output_section->vma
5227 + myh->root.u.def.section->output_offset
5228 + myh->root.u.def.value;
5229
5230 errnode->u.v.branch->vma = vma;
5231 break;
5232
5233 default:
5234 abort ();
5235 }
5236 }
5237 }
5238
5239 free (tmp_name);
5240 }
5241
5242
5243 /* Set target relocation values needed during linking. */
5244
5245 void
5246 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
5247 struct bfd_link_info *link_info,
5248 int target1_is_rel,
5249 char * target2_type,
5250 int fix_v4bx,
5251 int use_blx,
5252 bfd_arm_vfp11_fix vfp11_fix,
5253 int no_enum_warn, int no_wchar_warn,
5254 int pic_veneer)
5255 {
5256 struct elf32_arm_link_hash_table *globals;
5257
5258 globals = elf32_arm_hash_table (link_info);
5259
5260 globals->target1_is_rel = target1_is_rel;
5261 if (strcmp (target2_type, "rel") == 0)
5262 globals->target2_reloc = R_ARM_REL32;
5263 else if (strcmp (target2_type, "abs") == 0)
5264 globals->target2_reloc = R_ARM_ABS32;
5265 else if (strcmp (target2_type, "got-rel") == 0)
5266 globals->target2_reloc = R_ARM_GOT_PREL;
5267 else
5268 {
5269 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
5270 target2_type);
5271 }
5272 globals->fix_v4bx = fix_v4bx;
5273 globals->use_blx |= use_blx;
5274 globals->vfp11_fix = vfp11_fix;
5275 globals->pic_veneer = pic_veneer;
5276
5277 BFD_ASSERT (is_arm_elf (output_bfd));
5278 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
5279 elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
5280 }
5281
5282 /* Replace the target offset of a Thumb bl or b.w instruction. */
5283
5284 static void
5285 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
5286 {
5287 bfd_vma upper;
5288 bfd_vma lower;
5289 int reloc_sign;
5290
5291 BFD_ASSERT ((offset & 1) == 0);
5292
5293 upper = bfd_get_16 (abfd, insn);
5294 lower = bfd_get_16 (abfd, insn + 2);
5295 reloc_sign = (offset < 0) ? 1 : 0;
5296 upper = (upper & ~(bfd_vma) 0x7ff)
5297 | ((offset >> 12) & 0x3ff)
5298 | (reloc_sign << 10);
5299 lower = (lower & ~(bfd_vma) 0x2fff)
5300 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
5301 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
5302 | ((offset >> 1) & 0x7ff);
5303 bfd_put_16 (abfd, upper, insn);
5304 bfd_put_16 (abfd, lower, insn + 2);
5305 }
5306
5307 /* Thumb code calling an ARM function. */
5308
5309 static int
5310 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
5311 const char * name,
5312 bfd * input_bfd,
5313 bfd * output_bfd,
5314 asection * input_section,
5315 bfd_byte * hit_data,
5316 asection * sym_sec,
5317 bfd_vma offset,
5318 bfd_signed_vma addend,
5319 bfd_vma val,
5320 char **error_message)
5321 {
5322 asection * s = 0;
5323 bfd_vma my_offset;
5324 long int ret_offset;
5325 struct elf_link_hash_entry * myh;
5326 struct elf32_arm_link_hash_table * globals;
5327
5328 myh = find_thumb_glue (info, name, error_message);
5329 if (myh == NULL)
5330 return FALSE;
5331
5332 globals = elf32_arm_hash_table (info);
5333
5334 BFD_ASSERT (globals != NULL);
5335 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5336
5337 my_offset = myh->root.u.def.value;
5338
5339 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5340 THUMB2ARM_GLUE_SECTION_NAME);
5341
5342 BFD_ASSERT (s != NULL);
5343 BFD_ASSERT (s->contents != NULL);
5344 BFD_ASSERT (s->output_section != NULL);
5345
5346 if ((my_offset & 0x01) == 0x01)
5347 {
5348 if (sym_sec != NULL
5349 && sym_sec->owner != NULL
5350 && !INTERWORK_FLAG (sym_sec->owner))
5351 {
5352 (*_bfd_error_handler)
5353 (_("%B(%s): warning: interworking not enabled.\n"
5354 " first occurrence: %B: thumb call to arm"),
5355 sym_sec->owner, input_bfd, name);
5356
5357 return FALSE;
5358 }
5359
5360 --my_offset;
5361 myh->root.u.def.value = my_offset;
5362
5363 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
5364 s->contents + my_offset);
5365
5366 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
5367 s->contents + my_offset + 2);
5368
5369 ret_offset =
5370 /* Address of destination of the stub. */
5371 ((bfd_signed_vma) val)
5372 - ((bfd_signed_vma)
5373 /* Offset from the start of the current section
5374 to the start of the stubs. */
5375 (s->output_offset
5376 /* Offset of the start of this stub from the start of the stubs. */
5377 + my_offset
5378 /* Address of the start of the current section. */
5379 + s->output_section->vma)
5380 /* The branch instruction is 4 bytes into the stub. */
5381 + 4
5382 /* ARM branches work from the pc of the instruction + 8. */
5383 + 8);
5384
5385 put_arm_insn (globals, output_bfd,
5386 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
5387 s->contents + my_offset + 4);
5388 }
5389
5390 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
5391
5392 /* Now go back and fix up the original BL insn to point to here. */
5393 ret_offset =
5394 /* Address of where the stub is located. */
5395 (s->output_section->vma + s->output_offset + my_offset)
5396 /* Address of where the BL is located. */
5397 - (input_section->output_section->vma + input_section->output_offset
5398 + offset)
5399 /* Addend in the relocation. */
5400 - addend
5401 /* Biassing for PC-relative addressing. */
5402 - 8;
5403
5404 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
5405
5406 return TRUE;
5407 }
5408
5409 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
5410
5411 static struct elf_link_hash_entry *
5412 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
5413 const char * name,
5414 bfd * input_bfd,
5415 bfd * output_bfd,
5416 asection * sym_sec,
5417 bfd_vma val,
5418 asection * s,
5419 char ** error_message)
5420 {
5421 bfd_vma my_offset;
5422 long int ret_offset;
5423 struct elf_link_hash_entry * myh;
5424 struct elf32_arm_link_hash_table * globals;
5425
5426 myh = find_arm_glue (info, name, error_message);
5427 if (myh == NULL)
5428 return NULL;
5429
5430 globals = elf32_arm_hash_table (info);
5431
5432 BFD_ASSERT (globals != NULL);
5433 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5434
5435 my_offset = myh->root.u.def.value;
5436
5437 if ((my_offset & 0x01) == 0x01)
5438 {
5439 if (sym_sec != NULL
5440 && sym_sec->owner != NULL
5441 && !INTERWORK_FLAG (sym_sec->owner))
5442 {
5443 (*_bfd_error_handler)
5444 (_("%B(%s): warning: interworking not enabled.\n"
5445 " first occurrence: %B: arm call to thumb"),
5446 sym_sec->owner, input_bfd, name);
5447 }
5448
5449 --my_offset;
5450 myh->root.u.def.value = my_offset;
5451
5452 if (info->shared || globals->root.is_relocatable_executable
5453 || globals->pic_veneer)
5454 {
5455 /* For relocatable objects we can't use absolute addresses,
5456 so construct the address from a relative offset. */
5457 /* TODO: If the offset is small it's probably worth
5458 constructing the address with adds. */
5459 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
5460 s->contents + my_offset);
5461 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
5462 s->contents + my_offset + 4);
5463 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
5464 s->contents + my_offset + 8);
5465 /* Adjust the offset by 4 for the position of the add,
5466 and 8 for the pipeline offset. */
5467 ret_offset = (val - (s->output_offset
5468 + s->output_section->vma
5469 + my_offset + 12))
5470 | 1;
5471 bfd_put_32 (output_bfd, ret_offset,
5472 s->contents + my_offset + 12);
5473 }
5474 else if (globals->use_blx)
5475 {
5476 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
5477 s->contents + my_offset);
5478
5479 /* It's a thumb address. Add the low order bit. */
5480 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
5481 s->contents + my_offset + 4);
5482 }
5483 else
5484 {
5485 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
5486 s->contents + my_offset);
5487
5488 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
5489 s->contents + my_offset + 4);
5490
5491 /* It's a thumb address. Add the low order bit. */
5492 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
5493 s->contents + my_offset + 8);
5494
5495 my_offset += 12;
5496 }
5497 }
5498
5499 BFD_ASSERT (my_offset <= globals->arm_glue_size);
5500
5501 return myh;
5502 }
5503
5504 /* Arm code calling a Thumb function. */
5505
5506 static int
5507 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
5508 const char * name,
5509 bfd * input_bfd,
5510 bfd * output_bfd,
5511 asection * input_section,
5512 bfd_byte * hit_data,
5513 asection * sym_sec,
5514 bfd_vma offset,
5515 bfd_signed_vma addend,
5516 bfd_vma val,
5517 char **error_message)
5518 {
5519 unsigned long int tmp;
5520 bfd_vma my_offset;
5521 asection * s;
5522 long int ret_offset;
5523 struct elf_link_hash_entry * myh;
5524 struct elf32_arm_link_hash_table * globals;
5525
5526 globals = elf32_arm_hash_table (info);
5527
5528 BFD_ASSERT (globals != NULL);
5529 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5530
5531 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5532 ARM2THUMB_GLUE_SECTION_NAME);
5533 BFD_ASSERT (s != NULL);
5534 BFD_ASSERT (s->contents != NULL);
5535 BFD_ASSERT (s->output_section != NULL);
5536
5537 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
5538 sym_sec, val, s, error_message);
5539 if (!myh)
5540 return FALSE;
5541
5542 my_offset = myh->root.u.def.value;
5543 tmp = bfd_get_32 (input_bfd, hit_data);
5544 tmp = tmp & 0xFF000000;
5545
5546 /* Somehow these are both 4 too far, so subtract 8. */
5547 ret_offset = (s->output_offset
5548 + my_offset
5549 + s->output_section->vma
5550 - (input_section->output_offset
5551 + input_section->output_section->vma
5552 + offset + addend)
5553 - 8);
5554
5555 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
5556
5557 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
5558
5559 return TRUE;
5560 }
5561
5562 /* Populate Arm stub for an exported Thumb function. */
5563
5564 static bfd_boolean
5565 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
5566 {
5567 struct bfd_link_info * info = (struct bfd_link_info *) inf;
5568 asection * s;
5569 struct elf_link_hash_entry * myh;
5570 struct elf32_arm_link_hash_entry *eh;
5571 struct elf32_arm_link_hash_table * globals;
5572 asection *sec;
5573 bfd_vma val;
5574 char *error_message;
5575
5576 eh = elf32_arm_hash_entry (h);
5577 /* Allocate stubs for exported Thumb functions on v4t. */
5578 if (eh->export_glue == NULL)
5579 return TRUE;
5580
5581 globals = elf32_arm_hash_table (info);
5582
5583 BFD_ASSERT (globals != NULL);
5584 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5585
5586 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5587 ARM2THUMB_GLUE_SECTION_NAME);
5588 BFD_ASSERT (s != NULL);
5589 BFD_ASSERT (s->contents != NULL);
5590 BFD_ASSERT (s->output_section != NULL);
5591
5592 sec = eh->export_glue->root.u.def.section;
5593
5594 BFD_ASSERT (sec->output_section != NULL);
5595
5596 val = eh->export_glue->root.u.def.value + sec->output_offset
5597 + sec->output_section->vma;
5598
5599 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
5600 h->root.u.def.section->owner,
5601 globals->obfd, sec, val, s,
5602 &error_message);
5603 BFD_ASSERT (myh);
5604 return TRUE;
5605 }
5606
5607 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
5608
5609 static bfd_vma
5610 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
5611 {
5612 bfd_byte *p;
5613 bfd_vma glue_addr;
5614 asection *s;
5615 struct elf32_arm_link_hash_table *globals;
5616
5617 globals = elf32_arm_hash_table (info);
5618
5619 BFD_ASSERT (globals != NULL);
5620 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5621
5622 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5623 ARM_BX_GLUE_SECTION_NAME);
5624 BFD_ASSERT (s != NULL);
5625 BFD_ASSERT (s->contents != NULL);
5626 BFD_ASSERT (s->output_section != NULL);
5627
5628 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
5629
5630 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
5631
5632 if ((globals->bx_glue_offset[reg] & 1) == 0)
5633 {
5634 p = s->contents + glue_addr;
5635 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
5636 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
5637 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
5638 globals->bx_glue_offset[reg] |= 1;
5639 }
5640
5641 return glue_addr + s->output_section->vma + s->output_offset;
5642 }
5643
5644 /* Generate Arm stubs for exported Thumb symbols. */
5645 static void
5646 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
5647 struct bfd_link_info *link_info)
5648 {
5649 struct elf32_arm_link_hash_table * globals;
5650
5651 if (link_info == NULL)
5652 /* Ignore this if we are not called by the ELF backend linker. */
5653 return;
5654
5655 globals = elf32_arm_hash_table (link_info);
5656 /* If blx is available then exported Thumb symbols are OK and there is
5657 nothing to do. */
5658 if (globals->use_blx)
5659 return;
5660
5661 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
5662 link_info);
5663 }
5664
5665 /* Some relocations map to different relocations depending on the
5666 target. Return the real relocation. */
5667
5668 static int
5669 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
5670 int r_type)
5671 {
5672 switch (r_type)
5673 {
5674 case R_ARM_TARGET1:
5675 if (globals->target1_is_rel)
5676 return R_ARM_REL32;
5677 else
5678 return R_ARM_ABS32;
5679
5680 case R_ARM_TARGET2:
5681 return globals->target2_reloc;
5682
5683 default:
5684 return r_type;
5685 }
5686 }
5687
5688 /* Return the base VMA address which should be subtracted from real addresses
5689 when resolving @dtpoff relocation.
5690 This is PT_TLS segment p_vaddr. */
5691
5692 static bfd_vma
5693 dtpoff_base (struct bfd_link_info *info)
5694 {
5695 /* If tls_sec is NULL, we should have signalled an error already. */
5696 if (elf_hash_table (info)->tls_sec == NULL)
5697 return 0;
5698 return elf_hash_table (info)->tls_sec->vma;
5699 }
5700
5701 /* Return the relocation value for @tpoff relocation
5702 if STT_TLS virtual address is ADDRESS. */
5703
5704 static bfd_vma
5705 tpoff (struct bfd_link_info *info, bfd_vma address)
5706 {
5707 struct elf_link_hash_table *htab = elf_hash_table (info);
5708 bfd_vma base;
5709
5710 /* If tls_sec is NULL, we should have signalled an error already. */
5711 if (htab->tls_sec == NULL)
5712 return 0;
5713 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
5714 return address - htab->tls_sec->vma + base;
5715 }
5716
5717 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
5718 VALUE is the relocation value. */
5719
5720 static bfd_reloc_status_type
5721 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
5722 {
5723 if (value > 0xfff)
5724 return bfd_reloc_overflow;
5725
5726 value |= bfd_get_32 (abfd, data) & 0xfffff000;
5727 bfd_put_32 (abfd, value, data);
5728 return bfd_reloc_ok;
5729 }
5730
5731 /* For a given value of n, calculate the value of G_n as required to
5732 deal with group relocations. We return it in the form of an
5733 encoded constant-and-rotation, together with the final residual. If n is
5734 specified as less than zero, then final_residual is filled with the
5735 input value and no further action is performed. */
5736
5737 static bfd_vma
5738 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
5739 {
5740 int current_n;
5741 bfd_vma g_n;
5742 bfd_vma encoded_g_n = 0;
5743 bfd_vma residual = value; /* Also known as Y_n. */
5744
5745 for (current_n = 0; current_n <= n; current_n++)
5746 {
5747 int shift;
5748
5749 /* Calculate which part of the value to mask. */
5750 if (residual == 0)
5751 shift = 0;
5752 else
5753 {
5754 int msb;
5755
5756 /* Determine the most significant bit in the residual and
5757 align the resulting value to a 2-bit boundary. */
5758 for (msb = 30; msb >= 0; msb -= 2)
5759 if (residual & (3 << msb))
5760 break;
5761
5762 /* The desired shift is now (msb - 6), or zero, whichever
5763 is the greater. */
5764 shift = msb - 6;
5765 if (shift < 0)
5766 shift = 0;
5767 }
5768
5769 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
5770 g_n = residual & (0xff << shift);
5771 encoded_g_n = (g_n >> shift)
5772 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
5773
5774 /* Calculate the residual for the next time around. */
5775 residual &= ~g_n;
5776 }
5777
5778 *final_residual = residual;
5779
5780 return encoded_g_n;
5781 }
5782
5783 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
5784 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
5785
5786 static int
5787 identify_add_or_sub (bfd_vma insn)
5788 {
5789 int opcode = insn & 0x1e00000;
5790
5791 if (opcode == 1 << 23) /* ADD */
5792 return 1;
5793
5794 if (opcode == 1 << 22) /* SUB */
5795 return -1;
5796
5797 return 0;
5798 }
5799
5800 /* Perform a relocation as part of a final link. */
5801
5802 static bfd_reloc_status_type
5803 elf32_arm_final_link_relocate (reloc_howto_type * howto,
5804 bfd * input_bfd,
5805 bfd * output_bfd,
5806 asection * input_section,
5807 bfd_byte * contents,
5808 Elf_Internal_Rela * rel,
5809 bfd_vma value,
5810 struct bfd_link_info * info,
5811 asection * sym_sec,
5812 const char * sym_name,
5813 int sym_flags,
5814 struct elf_link_hash_entry * h,
5815 bfd_boolean * unresolved_reloc_p,
5816 char ** error_message)
5817 {
5818 unsigned long r_type = howto->type;
5819 unsigned long r_symndx;
5820 bfd_byte * hit_data = contents + rel->r_offset;
5821 bfd * dynobj = NULL;
5822 Elf_Internal_Shdr * symtab_hdr;
5823 struct elf_link_hash_entry ** sym_hashes;
5824 bfd_vma * local_got_offsets;
5825 asection * sgot = NULL;
5826 asection * splt = NULL;
5827 asection * sreloc = NULL;
5828 bfd_vma addend;
5829 bfd_signed_vma signed_addend;
5830 struct elf32_arm_link_hash_table * globals;
5831
5832 globals = elf32_arm_hash_table (info);
5833
5834 BFD_ASSERT (is_arm_elf (input_bfd));
5835
5836 /* Some relocation types map to different relocations depending on the
5837 target. We pick the right one here. */
5838 r_type = arm_real_reloc_type (globals, r_type);
5839 if (r_type != howto->type)
5840 howto = elf32_arm_howto_from_type (r_type);
5841
5842 /* If the start address has been set, then set the EF_ARM_HASENTRY
5843 flag. Setting this more than once is redundant, but the cost is
5844 not too high, and it keeps the code simple.
5845
5846 The test is done here, rather than somewhere else, because the
5847 start address is only set just before the final link commences.
5848
5849 Note - if the user deliberately sets a start address of 0, the
5850 flag will not be set. */
5851 if (bfd_get_start_address (output_bfd) != 0)
5852 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
5853
5854 dynobj = elf_hash_table (info)->dynobj;
5855 if (dynobj)
5856 {
5857 sgot = bfd_get_section_by_name (dynobj, ".got");
5858 splt = bfd_get_section_by_name (dynobj, ".plt");
5859 }
5860 symtab_hdr = & elf_symtab_hdr (input_bfd);
5861 sym_hashes = elf_sym_hashes (input_bfd);
5862 local_got_offsets = elf_local_got_offsets (input_bfd);
5863 r_symndx = ELF32_R_SYM (rel->r_info);
5864
5865 if (globals->use_rel)
5866 {
5867 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
5868
5869 if (addend & ((howto->src_mask + 1) >> 1))
5870 {
5871 signed_addend = -1;
5872 signed_addend &= ~ howto->src_mask;
5873 signed_addend |= addend;
5874 }
5875 else
5876 signed_addend = addend;
5877 }
5878 else
5879 addend = signed_addend = rel->r_addend;
5880
5881 switch (r_type)
5882 {
5883 case R_ARM_NONE:
5884 /* We don't need to find a value for this symbol. It's just a
5885 marker. */
5886 *unresolved_reloc_p = FALSE;
5887 return bfd_reloc_ok;
5888
5889 case R_ARM_ABS12:
5890 if (!globals->vxworks_p)
5891 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
5892
5893 case R_ARM_PC24:
5894 case R_ARM_ABS32:
5895 case R_ARM_ABS32_NOI:
5896 case R_ARM_REL32:
5897 case R_ARM_REL32_NOI:
5898 case R_ARM_CALL:
5899 case R_ARM_JUMP24:
5900 case R_ARM_XPC25:
5901 case R_ARM_PREL31:
5902 case R_ARM_PLT32:
5903 /* Handle relocations which should use the PLT entry. ABS32/REL32
5904 will use the symbol's value, which may point to a PLT entry, but we
5905 don't need to handle that here. If we created a PLT entry, all
5906 branches in this object should go to it. */
5907 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
5908 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
5909 && h != NULL
5910 && splt != NULL
5911 && h->plt.offset != (bfd_vma) -1)
5912 {
5913 /* If we've created a .plt section, and assigned a PLT entry to
5914 this function, it should not be known to bind locally. If
5915 it were, we would have cleared the PLT entry. */
5916 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
5917
5918 value = (splt->output_section->vma
5919 + splt->output_offset
5920 + h->plt.offset);
5921 *unresolved_reloc_p = FALSE;
5922 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5923 contents, rel->r_offset, value,
5924 rel->r_addend);
5925 }
5926
5927 /* When generating a shared object or relocatable executable, these
5928 relocations are copied into the output file to be resolved at
5929 run time. */
5930 if ((info->shared || globals->root.is_relocatable_executable)
5931 && (input_section->flags & SEC_ALLOC)
5932 && !(elf32_arm_hash_table (info)->vxworks_p
5933 && strcmp (input_section->output_section->name,
5934 ".tls_vars") == 0)
5935 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
5936 || !SYMBOL_CALLS_LOCAL (info, h))
5937 && (h == NULL
5938 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5939 || h->root.type != bfd_link_hash_undefweak)
5940 && r_type != R_ARM_PC24
5941 && r_type != R_ARM_CALL
5942 && r_type != R_ARM_JUMP24
5943 && r_type != R_ARM_PREL31
5944 && r_type != R_ARM_PLT32)
5945 {
5946 Elf_Internal_Rela outrel;
5947 bfd_byte *loc;
5948 bfd_boolean skip, relocate;
5949
5950 *unresolved_reloc_p = FALSE;
5951
5952 if (sreloc == NULL)
5953 {
5954 sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section,
5955 ! globals->use_rel);
5956
5957 if (sreloc == NULL)
5958 return bfd_reloc_notsupported;
5959 }
5960
5961 skip = FALSE;
5962 relocate = FALSE;
5963
5964 outrel.r_addend = addend;
5965 outrel.r_offset =
5966 _bfd_elf_section_offset (output_bfd, info, input_section,
5967 rel->r_offset);
5968 if (outrel.r_offset == (bfd_vma) -1)
5969 skip = TRUE;
5970 else if (outrel.r_offset == (bfd_vma) -2)
5971 skip = TRUE, relocate = TRUE;
5972 outrel.r_offset += (input_section->output_section->vma
5973 + input_section->output_offset);
5974
5975 if (skip)
5976 memset (&outrel, 0, sizeof outrel);
5977 else if (h != NULL
5978 && h->dynindx != -1
5979 && (!info->shared
5980 || !info->symbolic
5981 || !h->def_regular))
5982 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5983 else
5984 {
5985 int symbol;
5986
5987 /* This symbol is local, or marked to become local. */
5988 if (sym_flags == STT_ARM_TFUNC)
5989 value |= 1;
5990 if (globals->symbian_p)
5991 {
5992 asection *osec;
5993
5994 /* On Symbian OS, the data segment and text segement
5995 can be relocated independently. Therefore, we
5996 must indicate the segment to which this
5997 relocation is relative. The BPABI allows us to
5998 use any symbol in the right segment; we just use
5999 the section symbol as it is convenient. (We
6000 cannot use the symbol given by "h" directly as it
6001 will not appear in the dynamic symbol table.)
6002
6003 Note that the dynamic linker ignores the section
6004 symbol value, so we don't subtract osec->vma
6005 from the emitted reloc addend. */
6006 if (sym_sec)
6007 osec = sym_sec->output_section;
6008 else
6009 osec = input_section->output_section;
6010 symbol = elf_section_data (osec)->dynindx;
6011 if (symbol == 0)
6012 {
6013 struct elf_link_hash_table *htab = elf_hash_table (info);
6014
6015 if ((osec->flags & SEC_READONLY) == 0
6016 && htab->data_index_section != NULL)
6017 osec = htab->data_index_section;
6018 else
6019 osec = htab->text_index_section;
6020 symbol = elf_section_data (osec)->dynindx;
6021 }
6022 BFD_ASSERT (symbol != 0);
6023 }
6024 else
6025 /* On SVR4-ish systems, the dynamic loader cannot
6026 relocate the text and data segments independently,
6027 so the symbol does not matter. */
6028 symbol = 0;
6029 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
6030 if (globals->use_rel)
6031 relocate = TRUE;
6032 else
6033 outrel.r_addend += value;
6034 }
6035
6036 loc = sreloc->contents;
6037 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
6038 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6039
6040 /* If this reloc is against an external symbol, we do not want to
6041 fiddle with the addend. Otherwise, we need to include the symbol
6042 value so that it becomes an addend for the dynamic reloc. */
6043 if (! relocate)
6044 return bfd_reloc_ok;
6045
6046 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6047 contents, rel->r_offset, value,
6048 (bfd_vma) 0);
6049 }
6050 else switch (r_type)
6051 {
6052 case R_ARM_ABS12:
6053 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
6054
6055 case R_ARM_XPC25: /* Arm BLX instruction. */
6056 case R_ARM_CALL:
6057 case R_ARM_JUMP24:
6058 case R_ARM_PC24: /* Arm B/BL instruction. */
6059 case R_ARM_PLT32:
6060 {
6061 bfd_vma from;
6062 bfd_signed_vma branch_offset;
6063 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6064
6065 from = (input_section->output_section->vma
6066 + input_section->output_offset
6067 + rel->r_offset);
6068 branch_offset = (bfd_signed_vma)(value - from);
6069
6070 if (r_type == R_ARM_XPC25)
6071 {
6072 /* Check for Arm calling Arm function. */
6073 /* FIXME: Should we translate the instruction into a BL
6074 instruction instead ? */
6075 if (sym_flags != STT_ARM_TFUNC)
6076 (*_bfd_error_handler)
6077 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
6078 input_bfd,
6079 h ? h->root.root.string : "(local)");
6080 }
6081 else if (r_type != R_ARM_CALL)
6082 {
6083 /* Check for Arm calling Thumb function. */
6084 if (sym_flags == STT_ARM_TFUNC)
6085 {
6086 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
6087 output_bfd, input_section,
6088 hit_data, sym_sec, rel->r_offset,
6089 signed_addend, value,
6090 error_message))
6091 return bfd_reloc_ok;
6092 else
6093 return bfd_reloc_dangerous;
6094 }
6095 }
6096
6097 /* Check if a stub has to be inserted because the
6098 destination is too far or we are changing mode. */
6099 if (r_type == R_ARM_CALL)
6100 {
6101 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
6102 || branch_offset < ARM_MAX_BWD_BRANCH_OFFSET
6103 || sym_flags == STT_ARM_TFUNC)
6104 {
6105 /* The target is out of reach, so redirect the
6106 branch to the local stub for this function. */
6107
6108 stub_entry = elf32_arm_get_stub_entry (input_section,
6109 sym_sec, h,
6110 rel, globals);
6111 if (stub_entry != NULL)
6112 value = (stub_entry->stub_offset
6113 + stub_entry->stub_sec->output_offset
6114 + stub_entry->stub_sec->output_section->vma);
6115 }
6116 }
6117
6118 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
6119 where:
6120 S is the address of the symbol in the relocation.
6121 P is address of the instruction being relocated.
6122 A is the addend (extracted from the instruction) in bytes.
6123
6124 S is held in 'value'.
6125 P is the base address of the section containing the
6126 instruction plus the offset of the reloc into that
6127 section, ie:
6128 (input_section->output_section->vma +
6129 input_section->output_offset +
6130 rel->r_offset).
6131 A is the addend, converted into bytes, ie:
6132 (signed_addend * 4)
6133
6134 Note: None of these operations have knowledge of the pipeline
6135 size of the processor, thus it is up to the assembler to
6136 encode this information into the addend. */
6137 value -= (input_section->output_section->vma
6138 + input_section->output_offset);
6139 value -= rel->r_offset;
6140 if (globals->use_rel)
6141 value += (signed_addend << howto->size);
6142 else
6143 /* RELA addends do not have to be adjusted by howto->size. */
6144 value += signed_addend;
6145
6146 signed_addend = value;
6147 signed_addend >>= howto->rightshift;
6148
6149 /* A branch to an undefined weak symbol is turned into a jump to
6150 the next instruction. */
6151 if (h && h->root.type == bfd_link_hash_undefweak)
6152 {
6153 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000)
6154 | 0x0affffff;
6155 }
6156 else
6157 {
6158 /* Perform a signed range check. */
6159 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
6160 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
6161 return bfd_reloc_overflow;
6162
6163 addend = (value & 2);
6164
6165 value = (signed_addend & howto->dst_mask)
6166 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
6167
6168 /* Set the H bit in the BLX instruction. */
6169 if (sym_flags == STT_ARM_TFUNC)
6170 {
6171 if (addend)
6172 value |= (1 << 24);
6173 else
6174 value &= ~(bfd_vma)(1 << 24);
6175 }
6176 if (r_type == R_ARM_CALL)
6177 {
6178 /* Select the correct instruction (BL or BLX). */
6179 /* Only if we are not handling a BL to a stub. In this
6180 case, mode switching is performed by the stub. */
6181 if (sym_flags == STT_ARM_TFUNC && !stub_entry)
6182 value |= (1 << 28);
6183 else
6184 {
6185 value &= ~(bfd_vma)(1 << 28);
6186 value |= (1 << 24);
6187 }
6188 }
6189 }
6190 }
6191 break;
6192
6193 case R_ARM_ABS32:
6194 value += addend;
6195 if (sym_flags == STT_ARM_TFUNC)
6196 value |= 1;
6197 break;
6198
6199 case R_ARM_ABS32_NOI:
6200 value += addend;
6201 break;
6202
6203 case R_ARM_REL32:
6204 value += addend;
6205 if (sym_flags == STT_ARM_TFUNC)
6206 value |= 1;
6207 value -= (input_section->output_section->vma
6208 + input_section->output_offset + rel->r_offset);
6209 break;
6210
6211 case R_ARM_REL32_NOI:
6212 value += addend;
6213 value -= (input_section->output_section->vma
6214 + input_section->output_offset + rel->r_offset);
6215 break;
6216
6217 case R_ARM_PREL31:
6218 value -= (input_section->output_section->vma
6219 + input_section->output_offset + rel->r_offset);
6220 value += signed_addend;
6221 if (! h || h->root.type != bfd_link_hash_undefweak)
6222 {
6223 /* Check for overflow. */
6224 if ((value ^ (value >> 1)) & (1 << 30))
6225 return bfd_reloc_overflow;
6226 }
6227 value &= 0x7fffffff;
6228 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
6229 if (sym_flags == STT_ARM_TFUNC)
6230 value |= 1;
6231 break;
6232 }
6233
6234 bfd_put_32 (input_bfd, value, hit_data);
6235 return bfd_reloc_ok;
6236
6237 case R_ARM_ABS8:
6238 value += addend;
6239 if ((long) value > 0x7f || (long) value < -0x80)
6240 return bfd_reloc_overflow;
6241
6242 bfd_put_8 (input_bfd, value, hit_data);
6243 return bfd_reloc_ok;
6244
6245 case R_ARM_ABS16:
6246 value += addend;
6247
6248 if ((long) value > 0x7fff || (long) value < -0x8000)
6249 return bfd_reloc_overflow;
6250
6251 bfd_put_16 (input_bfd, value, hit_data);
6252 return bfd_reloc_ok;
6253
6254 case R_ARM_THM_ABS5:
6255 /* Support ldr and str instructions for the thumb. */
6256 if (globals->use_rel)
6257 {
6258 /* Need to refetch addend. */
6259 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6260 /* ??? Need to determine shift amount from operand size. */
6261 addend >>= howto->rightshift;
6262 }
6263 value += addend;
6264
6265 /* ??? Isn't value unsigned? */
6266 if ((long) value > 0x1f || (long) value < -0x10)
6267 return bfd_reloc_overflow;
6268
6269 /* ??? Value needs to be properly shifted into place first. */
6270 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
6271 bfd_put_16 (input_bfd, value, hit_data);
6272 return bfd_reloc_ok;
6273
6274 case R_ARM_THM_ALU_PREL_11_0:
6275 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
6276 {
6277 bfd_vma insn;
6278 bfd_signed_vma relocation;
6279
6280 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6281 | bfd_get_16 (input_bfd, hit_data + 2);
6282
6283 if (globals->use_rel)
6284 {
6285 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
6286 | ((insn & (1 << 26)) >> 15);
6287 if (insn & 0xf00000)
6288 signed_addend = -signed_addend;
6289 }
6290
6291 relocation = value + signed_addend;
6292 relocation -= (input_section->output_section->vma
6293 + input_section->output_offset
6294 + rel->r_offset);
6295
6296 value = abs (relocation);
6297
6298 if (value >= 0x1000)
6299 return bfd_reloc_overflow;
6300
6301 insn = (insn & 0xfb0f8f00) | (value & 0xff)
6302 | ((value & 0x700) << 4)
6303 | ((value & 0x800) << 15);
6304 if (relocation < 0)
6305 insn |= 0xa00000;
6306
6307 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6308 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6309
6310 return bfd_reloc_ok;
6311 }
6312
6313 case R_ARM_THM_PC12:
6314 /* Corresponds to: ldr.w reg, [pc, #offset]. */
6315 {
6316 bfd_vma insn;
6317 bfd_signed_vma relocation;
6318
6319 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6320 | bfd_get_16 (input_bfd, hit_data + 2);
6321
6322 if (globals->use_rel)
6323 {
6324 signed_addend = insn & 0xfff;
6325 if (!(insn & (1 << 23)))
6326 signed_addend = -signed_addend;
6327 }
6328
6329 relocation = value + signed_addend;
6330 relocation -= (input_section->output_section->vma
6331 + input_section->output_offset
6332 + rel->r_offset);
6333
6334 value = abs (relocation);
6335
6336 if (value >= 0x1000)
6337 return bfd_reloc_overflow;
6338
6339 insn = (insn & 0xff7ff000) | value;
6340 if (relocation >= 0)
6341 insn |= (1 << 23);
6342
6343 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6344 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6345
6346 return bfd_reloc_ok;
6347 }
6348
6349 case R_ARM_THM_XPC22:
6350 case R_ARM_THM_CALL:
6351 case R_ARM_THM_JUMP24:
6352 /* Thumb BL (branch long instruction). */
6353 {
6354 bfd_vma relocation;
6355 bfd_vma reloc_sign;
6356 bfd_boolean overflow = FALSE;
6357 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6358 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6359 bfd_signed_vma reloc_signed_max;
6360 bfd_signed_vma reloc_signed_min;
6361 bfd_vma check;
6362 bfd_signed_vma signed_check;
6363 int bitsize;
6364 int thumb2 = using_thumb2 (globals);
6365
6366 /* A branch to an undefined weak symbol is turned into a jump to
6367 the next instruction unless a PLT entry will be created. */
6368 if (h && h->root.type == bfd_link_hash_undefweak
6369 && !(splt != NULL && h->plt.offset != (bfd_vma) -1))
6370 {
6371 bfd_put_16 (input_bfd, 0xe000, hit_data);
6372 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
6373 return bfd_reloc_ok;
6374 }
6375
6376 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
6377 with Thumb-1) involving the J1 and J2 bits. */
6378 if (globals->use_rel)
6379 {
6380 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
6381 bfd_vma upper = upper_insn & 0x3ff;
6382 bfd_vma lower = lower_insn & 0x7ff;
6383 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
6384 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
6385 bfd_vma i1 = j1 ^ s ? 0 : 1;
6386 bfd_vma i2 = j2 ^ s ? 0 : 1;
6387
6388 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
6389 /* Sign extend. */
6390 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
6391
6392 signed_addend = addend;
6393 }
6394
6395 if (r_type == R_ARM_THM_XPC22)
6396 {
6397 /* Check for Thumb to Thumb call. */
6398 /* FIXME: Should we translate the instruction into a BL
6399 instruction instead ? */
6400 if (sym_flags == STT_ARM_TFUNC)
6401 (*_bfd_error_handler)
6402 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
6403 input_bfd,
6404 h ? h->root.root.string : "(local)");
6405 }
6406 else
6407 {
6408 /* If it is not a call to Thumb, assume call to Arm.
6409 If it is a call relative to a section name, then it is not a
6410 function call at all, but rather a long jump. Calls through
6411 the PLT do not require stubs. */
6412 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
6413 && (h == NULL || splt == NULL
6414 || h->plt.offset == (bfd_vma) -1))
6415 {
6416 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6417 {
6418 /* Convert BL to BLX. */
6419 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6420 }
6421 else if (r_type != R_ARM_THM_CALL)
6422 {
6423 if (elf32_thumb_to_arm_stub
6424 (info, sym_name, input_bfd, output_bfd, input_section,
6425 hit_data, sym_sec, rel->r_offset, signed_addend, value,
6426 error_message))
6427 return bfd_reloc_ok;
6428 else
6429 return bfd_reloc_dangerous;
6430 }
6431 }
6432 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
6433 && r_type == R_ARM_THM_CALL)
6434 {
6435 /* Make sure this is a BL. */
6436 lower_insn |= 0x1800;
6437 }
6438 }
6439
6440 /* Handle calls via the PLT. */
6441 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6442 {
6443 value = (splt->output_section->vma
6444 + splt->output_offset
6445 + h->plt.offset);
6446 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6447 {
6448 /* If the Thumb BLX instruction is available, convert the
6449 BL to a BLX instruction to call the ARM-mode PLT entry. */
6450 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6451 }
6452 else
6453 /* Target the Thumb stub before the ARM PLT entry. */
6454 value -= PLT_THUMB_STUB_SIZE;
6455 *unresolved_reloc_p = FALSE;
6456 }
6457
6458 if (r_type == R_ARM_THM_CALL)
6459 {
6460 /* Check if a stub has to be inserted because the destination
6461 is too far. */
6462 bfd_vma from;
6463 bfd_signed_vma branch_offset;
6464 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6465
6466 from = (input_section->output_section->vma
6467 + input_section->output_offset
6468 + rel->r_offset);
6469 branch_offset = (bfd_signed_vma)(value - from);
6470
6471 if ((!thumb2
6472 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
6473 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
6474 ||
6475 (thumb2
6476 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
6477 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
6478 || ((sym_flags != STT_ARM_TFUNC) && !globals->use_blx))
6479 {
6480 /* The target is out of reach or we are changing modes, so
6481 redirect the branch to the local stub for this
6482 function. */
6483 stub_entry = elf32_arm_get_stub_entry (input_section,
6484 sym_sec, h,
6485 rel, globals);
6486 if (stub_entry != NULL)
6487 value = (stub_entry->stub_offset
6488 + stub_entry->stub_sec->output_offset
6489 + stub_entry->stub_sec->output_section->vma);
6490
6491 /* If this call becomes a call to Arm, force BLX. */
6492 if (globals->use_blx)
6493 {
6494 if ((stub_entry
6495 && !arm_stub_is_thumb (stub_entry->stub_type))
6496 || (sym_flags != STT_ARM_TFUNC))
6497 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6498 }
6499 }
6500 }
6501
6502 relocation = value + signed_addend;
6503
6504 relocation -= (input_section->output_section->vma
6505 + input_section->output_offset
6506 + rel->r_offset);
6507
6508 check = relocation >> howto->rightshift;
6509
6510 /* If this is a signed value, the rightshift just dropped
6511 leading 1 bits (assuming twos complement). */
6512 if ((bfd_signed_vma) relocation >= 0)
6513 signed_check = check;
6514 else
6515 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
6516
6517 /* Calculate the permissable maximum and minimum values for
6518 this relocation according to whether we're relocating for
6519 Thumb-2 or not. */
6520 bitsize = howto->bitsize;
6521 if (!thumb2)
6522 bitsize -= 2;
6523 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
6524 reloc_signed_min = ~reloc_signed_max;
6525
6526 /* Assumes two's complement. */
6527 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6528 overflow = TRUE;
6529
6530 if ((lower_insn & 0x5000) == 0x4000)
6531 /* For a BLX instruction, make sure that the relocation is rounded up
6532 to a word boundary. This follows the semantics of the instruction
6533 which specifies that bit 1 of the target address will come from bit
6534 1 of the base address. */
6535 relocation = (relocation + 2) & ~ 3;
6536
6537 /* Put RELOCATION back into the insn. Assumes two's complement.
6538 We use the Thumb-2 encoding, which is safe even if dealing with
6539 a Thumb-1 instruction by virtue of our overflow check above. */
6540 reloc_sign = (signed_check < 0) ? 1 : 0;
6541 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
6542 | ((relocation >> 12) & 0x3ff)
6543 | (reloc_sign << 10);
6544 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
6545 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
6546 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
6547 | ((relocation >> 1) & 0x7ff);
6548
6549 /* Put the relocated value back in the object file: */
6550 bfd_put_16 (input_bfd, upper_insn, hit_data);
6551 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6552
6553 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6554 }
6555 break;
6556
6557 case R_ARM_THM_JUMP19:
6558 /* Thumb32 conditional branch instruction. */
6559 {
6560 bfd_vma relocation;
6561 bfd_boolean overflow = FALSE;
6562 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6563 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6564 bfd_signed_vma reloc_signed_max = 0xffffe;
6565 bfd_signed_vma reloc_signed_min = -0x100000;
6566 bfd_signed_vma signed_check;
6567
6568 /* Need to refetch the addend, reconstruct the top three bits,
6569 and squish the two 11 bit pieces together. */
6570 if (globals->use_rel)
6571 {
6572 bfd_vma S = (upper_insn & 0x0400) >> 10;
6573 bfd_vma upper = (upper_insn & 0x003f);
6574 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
6575 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
6576 bfd_vma lower = (lower_insn & 0x07ff);
6577
6578 upper |= J1 << 6;
6579 upper |= J2 << 7;
6580 upper |= (!S) << 8;
6581 upper -= 0x0100; /* Sign extend. */
6582
6583 addend = (upper << 12) | (lower << 1);
6584 signed_addend = addend;
6585 }
6586
6587 /* Handle calls via the PLT. */
6588 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6589 {
6590 value = (splt->output_section->vma
6591 + splt->output_offset
6592 + h->plt.offset);
6593 /* Target the Thumb stub before the ARM PLT entry. */
6594 value -= PLT_THUMB_STUB_SIZE;
6595 *unresolved_reloc_p = FALSE;
6596 }
6597
6598 /* ??? Should handle interworking? GCC might someday try to
6599 use this for tail calls. */
6600
6601 relocation = value + signed_addend;
6602 relocation -= (input_section->output_section->vma
6603 + input_section->output_offset
6604 + rel->r_offset);
6605 signed_check = (bfd_signed_vma) relocation;
6606
6607 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6608 overflow = TRUE;
6609
6610 /* Put RELOCATION back into the insn. */
6611 {
6612 bfd_vma S = (relocation & 0x00100000) >> 20;
6613 bfd_vma J2 = (relocation & 0x00080000) >> 19;
6614 bfd_vma J1 = (relocation & 0x00040000) >> 18;
6615 bfd_vma hi = (relocation & 0x0003f000) >> 12;
6616 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
6617
6618 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
6619 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
6620 }
6621
6622 /* Put the relocated value back in the object file: */
6623 bfd_put_16 (input_bfd, upper_insn, hit_data);
6624 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6625
6626 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6627 }
6628
6629 case R_ARM_THM_JUMP11:
6630 case R_ARM_THM_JUMP8:
6631 case R_ARM_THM_JUMP6:
6632 /* Thumb B (branch) instruction). */
6633 {
6634 bfd_signed_vma relocation;
6635 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
6636 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
6637 bfd_signed_vma signed_check;
6638
6639 /* CZB cannot jump backward. */
6640 if (r_type == R_ARM_THM_JUMP6)
6641 reloc_signed_min = 0;
6642
6643 if (globals->use_rel)
6644 {
6645 /* Need to refetch addend. */
6646 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6647 if (addend & ((howto->src_mask + 1) >> 1))
6648 {
6649 signed_addend = -1;
6650 signed_addend &= ~ howto->src_mask;
6651 signed_addend |= addend;
6652 }
6653 else
6654 signed_addend = addend;
6655 /* The value in the insn has been right shifted. We need to
6656 undo this, so that we can perform the address calculation
6657 in terms of bytes. */
6658 signed_addend <<= howto->rightshift;
6659 }
6660 relocation = value + signed_addend;
6661
6662 relocation -= (input_section->output_section->vma
6663 + input_section->output_offset
6664 + rel->r_offset);
6665
6666 relocation >>= howto->rightshift;
6667 signed_check = relocation;
6668
6669 if (r_type == R_ARM_THM_JUMP6)
6670 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
6671 else
6672 relocation &= howto->dst_mask;
6673 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
6674
6675 bfd_put_16 (input_bfd, relocation, hit_data);
6676
6677 /* Assumes two's complement. */
6678 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6679 return bfd_reloc_overflow;
6680
6681 return bfd_reloc_ok;
6682 }
6683
6684 case R_ARM_ALU_PCREL7_0:
6685 case R_ARM_ALU_PCREL15_8:
6686 case R_ARM_ALU_PCREL23_15:
6687 {
6688 bfd_vma insn;
6689 bfd_vma relocation;
6690
6691 insn = bfd_get_32 (input_bfd, hit_data);
6692 if (globals->use_rel)
6693 {
6694 /* Extract the addend. */
6695 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
6696 signed_addend = addend;
6697 }
6698 relocation = value + signed_addend;
6699
6700 relocation -= (input_section->output_section->vma
6701 + input_section->output_offset
6702 + rel->r_offset);
6703 insn = (insn & ~0xfff)
6704 | ((howto->bitpos << 7) & 0xf00)
6705 | ((relocation >> howto->bitpos) & 0xff);
6706 bfd_put_32 (input_bfd, value, hit_data);
6707 }
6708 return bfd_reloc_ok;
6709
6710 case R_ARM_GNU_VTINHERIT:
6711 case R_ARM_GNU_VTENTRY:
6712 return bfd_reloc_ok;
6713
6714 case R_ARM_GOTOFF32:
6715 /* Relocation is relative to the start of the
6716 global offset table. */
6717
6718 BFD_ASSERT (sgot != NULL);
6719 if (sgot == NULL)
6720 return bfd_reloc_notsupported;
6721
6722 /* If we are addressing a Thumb function, we need to adjust the
6723 address by one, so that attempts to call the function pointer will
6724 correctly interpret it as Thumb code. */
6725 if (sym_flags == STT_ARM_TFUNC)
6726 value += 1;
6727
6728 /* Note that sgot->output_offset is not involved in this
6729 calculation. We always want the start of .got. If we
6730 define _GLOBAL_OFFSET_TABLE in a different way, as is
6731 permitted by the ABI, we might have to change this
6732 calculation. */
6733 value -= sgot->output_section->vma;
6734 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6735 contents, rel->r_offset, value,
6736 rel->r_addend);
6737
6738 case R_ARM_GOTPC:
6739 /* Use global offset table as symbol value. */
6740 BFD_ASSERT (sgot != NULL);
6741
6742 if (sgot == NULL)
6743 return bfd_reloc_notsupported;
6744
6745 *unresolved_reloc_p = FALSE;
6746 value = sgot->output_section->vma;
6747 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6748 contents, rel->r_offset, value,
6749 rel->r_addend);
6750
6751 case R_ARM_GOT32:
6752 case R_ARM_GOT_PREL:
6753 /* Relocation is to the entry for this symbol in the
6754 global offset table. */
6755 if (sgot == NULL)
6756 return bfd_reloc_notsupported;
6757
6758 if (h != NULL)
6759 {
6760 bfd_vma off;
6761 bfd_boolean dyn;
6762
6763 off = h->got.offset;
6764 BFD_ASSERT (off != (bfd_vma) -1);
6765 dyn = globals->root.dynamic_sections_created;
6766
6767 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6768 || (info->shared
6769 && SYMBOL_REFERENCES_LOCAL (info, h))
6770 || (ELF_ST_VISIBILITY (h->other)
6771 && h->root.type == bfd_link_hash_undefweak))
6772 {
6773 /* This is actually a static link, or it is a -Bsymbolic link
6774 and the symbol is defined locally. We must initialize this
6775 entry in the global offset table. Since the offset must
6776 always be a multiple of 4, we use the least significant bit
6777 to record whether we have initialized it already.
6778
6779 When doing a dynamic link, we create a .rel(a).got relocation
6780 entry to initialize the value. This is done in the
6781 finish_dynamic_symbol routine. */
6782 if ((off & 1) != 0)
6783 off &= ~1;
6784 else
6785 {
6786 /* If we are addressing a Thumb function, we need to
6787 adjust the address by one, so that attempts to
6788 call the function pointer will correctly
6789 interpret it as Thumb code. */
6790 if (sym_flags == STT_ARM_TFUNC)
6791 value |= 1;
6792
6793 bfd_put_32 (output_bfd, value, sgot->contents + off);
6794 h->got.offset |= 1;
6795 }
6796 }
6797 else
6798 *unresolved_reloc_p = FALSE;
6799
6800 value = sgot->output_offset + off;
6801 }
6802 else
6803 {
6804 bfd_vma off;
6805
6806 BFD_ASSERT (local_got_offsets != NULL &&
6807 local_got_offsets[r_symndx] != (bfd_vma) -1);
6808
6809 off = local_got_offsets[r_symndx];
6810
6811 /* The offset must always be a multiple of 4. We use the
6812 least significant bit to record whether we have already
6813 generated the necessary reloc. */
6814 if ((off & 1) != 0)
6815 off &= ~1;
6816 else
6817 {
6818 /* If we are addressing a Thumb function, we need to
6819 adjust the address by one, so that attempts to
6820 call the function pointer will correctly
6821 interpret it as Thumb code. */
6822 if (sym_flags == STT_ARM_TFUNC)
6823 value |= 1;
6824
6825 if (globals->use_rel)
6826 bfd_put_32 (output_bfd, value, sgot->contents + off);
6827
6828 if (info->shared)
6829 {
6830 asection * srelgot;
6831 Elf_Internal_Rela outrel;
6832 bfd_byte *loc;
6833
6834 srelgot = (bfd_get_section_by_name
6835 (dynobj, RELOC_SECTION (globals, ".got")));
6836 BFD_ASSERT (srelgot != NULL);
6837
6838 outrel.r_addend = addend + value;
6839 outrel.r_offset = (sgot->output_section->vma
6840 + sgot->output_offset
6841 + off);
6842 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
6843 loc = srelgot->contents;
6844 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
6845 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6846 }
6847
6848 local_got_offsets[r_symndx] |= 1;
6849 }
6850
6851 value = sgot->output_offset + off;
6852 }
6853 if (r_type != R_ARM_GOT32)
6854 value += sgot->output_section->vma;
6855
6856 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6857 contents, rel->r_offset, value,
6858 rel->r_addend);
6859
6860 case R_ARM_TLS_LDO32:
6861 value = value - dtpoff_base (info);
6862
6863 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6864 contents, rel->r_offset, value,
6865 rel->r_addend);
6866
6867 case R_ARM_TLS_LDM32:
6868 {
6869 bfd_vma off;
6870
6871 if (globals->sgot == NULL)
6872 abort ();
6873
6874 off = globals->tls_ldm_got.offset;
6875
6876 if ((off & 1) != 0)
6877 off &= ~1;
6878 else
6879 {
6880 /* If we don't know the module number, create a relocation
6881 for it. */
6882 if (info->shared)
6883 {
6884 Elf_Internal_Rela outrel;
6885 bfd_byte *loc;
6886
6887 if (globals->srelgot == NULL)
6888 abort ();
6889
6890 outrel.r_addend = 0;
6891 outrel.r_offset = (globals->sgot->output_section->vma
6892 + globals->sgot->output_offset + off);
6893 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
6894
6895 if (globals->use_rel)
6896 bfd_put_32 (output_bfd, outrel.r_addend,
6897 globals->sgot->contents + off);
6898
6899 loc = globals->srelgot->contents;
6900 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
6901 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6902 }
6903 else
6904 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
6905
6906 globals->tls_ldm_got.offset |= 1;
6907 }
6908
6909 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
6910 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
6911
6912 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6913 contents, rel->r_offset, value,
6914 rel->r_addend);
6915 }
6916
6917 case R_ARM_TLS_GD32:
6918 case R_ARM_TLS_IE32:
6919 {
6920 bfd_vma off;
6921 int indx;
6922 char tls_type;
6923
6924 if (globals->sgot == NULL)
6925 abort ();
6926
6927 indx = 0;
6928 if (h != NULL)
6929 {
6930 bfd_boolean dyn;
6931 dyn = globals->root.dynamic_sections_created;
6932 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6933 && (!info->shared
6934 || !SYMBOL_REFERENCES_LOCAL (info, h)))
6935 {
6936 *unresolved_reloc_p = FALSE;
6937 indx = h->dynindx;
6938 }
6939 off = h->got.offset;
6940 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
6941 }
6942 else
6943 {
6944 if (local_got_offsets == NULL)
6945 abort ();
6946 off = local_got_offsets[r_symndx];
6947 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
6948 }
6949
6950 if (tls_type == GOT_UNKNOWN)
6951 abort ();
6952
6953 if ((off & 1) != 0)
6954 off &= ~1;
6955 else
6956 {
6957 bfd_boolean need_relocs = FALSE;
6958 Elf_Internal_Rela outrel;
6959 bfd_byte *loc = NULL;
6960 int cur_off = off;
6961
6962 /* The GOT entries have not been initialized yet. Do it
6963 now, and emit any relocations. If both an IE GOT and a
6964 GD GOT are necessary, we emit the GD first. */
6965
6966 if ((info->shared || indx != 0)
6967 && (h == NULL
6968 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6969 || h->root.type != bfd_link_hash_undefweak))
6970 {
6971 need_relocs = TRUE;
6972 if (globals->srelgot == NULL)
6973 abort ();
6974 loc = globals->srelgot->contents;
6975 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
6976 }
6977
6978 if (tls_type & GOT_TLS_GD)
6979 {
6980 if (need_relocs)
6981 {
6982 outrel.r_addend = 0;
6983 outrel.r_offset = (globals->sgot->output_section->vma
6984 + globals->sgot->output_offset
6985 + cur_off);
6986 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
6987
6988 if (globals->use_rel)
6989 bfd_put_32 (output_bfd, outrel.r_addend,
6990 globals->sgot->contents + cur_off);
6991
6992 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6993 globals->srelgot->reloc_count++;
6994 loc += RELOC_SIZE (globals);
6995
6996 if (indx == 0)
6997 bfd_put_32 (output_bfd, value - dtpoff_base (info),
6998 globals->sgot->contents + cur_off + 4);
6999 else
7000 {
7001 outrel.r_addend = 0;
7002 outrel.r_info = ELF32_R_INFO (indx,
7003 R_ARM_TLS_DTPOFF32);
7004 outrel.r_offset += 4;
7005
7006 if (globals->use_rel)
7007 bfd_put_32 (output_bfd, outrel.r_addend,
7008 globals->sgot->contents + cur_off + 4);
7009
7010
7011 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7012 globals->srelgot->reloc_count++;
7013 loc += RELOC_SIZE (globals);
7014 }
7015 }
7016 else
7017 {
7018 /* If we are not emitting relocations for a
7019 general dynamic reference, then we must be in a
7020 static link or an executable link with the
7021 symbol binding locally. Mark it as belonging
7022 to module 1, the executable. */
7023 bfd_put_32 (output_bfd, 1,
7024 globals->sgot->contents + cur_off);
7025 bfd_put_32 (output_bfd, value - dtpoff_base (info),
7026 globals->sgot->contents + cur_off + 4);
7027 }
7028
7029 cur_off += 8;
7030 }
7031
7032 if (tls_type & GOT_TLS_IE)
7033 {
7034 if (need_relocs)
7035 {
7036 if (indx == 0)
7037 outrel.r_addend = value - dtpoff_base (info);
7038 else
7039 outrel.r_addend = 0;
7040 outrel.r_offset = (globals->sgot->output_section->vma
7041 + globals->sgot->output_offset
7042 + cur_off);
7043 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
7044
7045 if (globals->use_rel)
7046 bfd_put_32 (output_bfd, outrel.r_addend,
7047 globals->sgot->contents + cur_off);
7048
7049 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7050 globals->srelgot->reloc_count++;
7051 loc += RELOC_SIZE (globals);
7052 }
7053 else
7054 bfd_put_32 (output_bfd, tpoff (info, value),
7055 globals->sgot->contents + cur_off);
7056 cur_off += 4;
7057 }
7058
7059 if (h != NULL)
7060 h->got.offset |= 1;
7061 else
7062 local_got_offsets[r_symndx] |= 1;
7063 }
7064
7065 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
7066 off += 8;
7067 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
7068 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
7069
7070 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7071 contents, rel->r_offset, value,
7072 rel->r_addend);
7073 }
7074
7075 case R_ARM_TLS_LE32:
7076 if (info->shared)
7077 {
7078 (*_bfd_error_handler)
7079 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
7080 input_bfd, input_section,
7081 (long) rel->r_offset, howto->name);
7082 return FALSE;
7083 }
7084 else
7085 value = tpoff (info, value);
7086
7087 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7088 contents, rel->r_offset, value,
7089 rel->r_addend);
7090
7091 case R_ARM_V4BX:
7092 if (globals->fix_v4bx)
7093 {
7094 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7095
7096 /* Ensure that we have a BX instruction. */
7097 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
7098
7099 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
7100 {
7101 /* Branch to veneer. */
7102 bfd_vma glue_addr;
7103 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
7104 glue_addr -= input_section->output_section->vma
7105 + input_section->output_offset
7106 + rel->r_offset + 8;
7107 insn = (insn & 0xf0000000) | 0x0a000000
7108 | ((glue_addr >> 2) & 0x00ffffff);
7109 }
7110 else
7111 {
7112 /* Preserve Rm (lowest four bits) and the condition code
7113 (highest four bits). Other bits encode MOV PC,Rm. */
7114 insn = (insn & 0xf000000f) | 0x01a0f000;
7115 }
7116
7117 bfd_put_32 (input_bfd, insn, hit_data);
7118 }
7119 return bfd_reloc_ok;
7120
7121 case R_ARM_MOVW_ABS_NC:
7122 case R_ARM_MOVT_ABS:
7123 case R_ARM_MOVW_PREL_NC:
7124 case R_ARM_MOVT_PREL:
7125 /* Until we properly support segment-base-relative addressing then
7126 we assume the segment base to be zero, as for the group relocations.
7127 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
7128 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
7129 case R_ARM_MOVW_BREL_NC:
7130 case R_ARM_MOVW_BREL:
7131 case R_ARM_MOVT_BREL:
7132 {
7133 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7134
7135 if (globals->use_rel)
7136 {
7137 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
7138 signed_addend = (addend ^ 0x8000) - 0x8000;
7139 }
7140
7141 value += signed_addend;
7142
7143 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
7144 value -= (input_section->output_section->vma
7145 + input_section->output_offset + rel->r_offset);
7146
7147 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
7148 return bfd_reloc_overflow;
7149
7150 if (sym_flags == STT_ARM_TFUNC)
7151 value |= 1;
7152
7153 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
7154 || r_type == R_ARM_MOVT_BREL)
7155 value >>= 16;
7156
7157 insn &= 0xfff0f000;
7158 insn |= value & 0xfff;
7159 insn |= (value & 0xf000) << 4;
7160 bfd_put_32 (input_bfd, insn, hit_data);
7161 }
7162 return bfd_reloc_ok;
7163
7164 case R_ARM_THM_MOVW_ABS_NC:
7165 case R_ARM_THM_MOVT_ABS:
7166 case R_ARM_THM_MOVW_PREL_NC:
7167 case R_ARM_THM_MOVT_PREL:
7168 /* Until we properly support segment-base-relative addressing then
7169 we assume the segment base to be zero, as for the above relocations.
7170 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
7171 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
7172 as R_ARM_THM_MOVT_ABS. */
7173 case R_ARM_THM_MOVW_BREL_NC:
7174 case R_ARM_THM_MOVW_BREL:
7175 case R_ARM_THM_MOVT_BREL:
7176 {
7177 bfd_vma insn;
7178
7179 insn = bfd_get_16 (input_bfd, hit_data) << 16;
7180 insn |= bfd_get_16 (input_bfd, hit_data + 2);
7181
7182 if (globals->use_rel)
7183 {
7184 addend = ((insn >> 4) & 0xf000)
7185 | ((insn >> 15) & 0x0800)
7186 | ((insn >> 4) & 0x0700)
7187 | (insn & 0x00ff);
7188 signed_addend = (addend ^ 0x8000) - 0x8000;
7189 }
7190
7191 value += signed_addend;
7192
7193 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
7194 value -= (input_section->output_section->vma
7195 + input_section->output_offset + rel->r_offset);
7196
7197 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
7198 return bfd_reloc_overflow;
7199
7200 if (sym_flags == STT_ARM_TFUNC)
7201 value |= 1;
7202
7203 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
7204 || r_type == R_ARM_THM_MOVT_BREL)
7205 value >>= 16;
7206
7207 insn &= 0xfbf08f00;
7208 insn |= (value & 0xf000) << 4;
7209 insn |= (value & 0x0800) << 15;
7210 insn |= (value & 0x0700) << 4;
7211 insn |= (value & 0x00ff);
7212
7213 bfd_put_16 (input_bfd, insn >> 16, hit_data);
7214 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
7215 }
7216 return bfd_reloc_ok;
7217
7218 case R_ARM_ALU_PC_G0_NC:
7219 case R_ARM_ALU_PC_G1_NC:
7220 case R_ARM_ALU_PC_G0:
7221 case R_ARM_ALU_PC_G1:
7222 case R_ARM_ALU_PC_G2:
7223 case R_ARM_ALU_SB_G0_NC:
7224 case R_ARM_ALU_SB_G1_NC:
7225 case R_ARM_ALU_SB_G0:
7226 case R_ARM_ALU_SB_G1:
7227 case R_ARM_ALU_SB_G2:
7228 {
7229 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7230 bfd_vma pc = input_section->output_section->vma
7231 + input_section->output_offset + rel->r_offset;
7232 /* sb should be the origin of the *segment* containing the symbol.
7233 It is not clear how to obtain this OS-dependent value, so we
7234 make an arbitrary choice of zero. */
7235 bfd_vma sb = 0;
7236 bfd_vma residual;
7237 bfd_vma g_n;
7238 bfd_signed_vma signed_value;
7239 int group = 0;
7240
7241 /* Determine which group of bits to select. */
7242 switch (r_type)
7243 {
7244 case R_ARM_ALU_PC_G0_NC:
7245 case R_ARM_ALU_PC_G0:
7246 case R_ARM_ALU_SB_G0_NC:
7247 case R_ARM_ALU_SB_G0:
7248 group = 0;
7249 break;
7250
7251 case R_ARM_ALU_PC_G1_NC:
7252 case R_ARM_ALU_PC_G1:
7253 case R_ARM_ALU_SB_G1_NC:
7254 case R_ARM_ALU_SB_G1:
7255 group = 1;
7256 break;
7257
7258 case R_ARM_ALU_PC_G2:
7259 case R_ARM_ALU_SB_G2:
7260 group = 2;
7261 break;
7262
7263 default:
7264 abort ();
7265 }
7266
7267 /* If REL, extract the addend from the insn. If RELA, it will
7268 have already been fetched for us. */
7269 if (globals->use_rel)
7270 {
7271 int negative;
7272 bfd_vma constant = insn & 0xff;
7273 bfd_vma rotation = (insn & 0xf00) >> 8;
7274
7275 if (rotation == 0)
7276 signed_addend = constant;
7277 else
7278 {
7279 /* Compensate for the fact that in the instruction, the
7280 rotation is stored in multiples of 2 bits. */
7281 rotation *= 2;
7282
7283 /* Rotate "constant" right by "rotation" bits. */
7284 signed_addend = (constant >> rotation) |
7285 (constant << (8 * sizeof (bfd_vma) - rotation));
7286 }
7287
7288 /* Determine if the instruction is an ADD or a SUB.
7289 (For REL, this determines the sign of the addend.) */
7290 negative = identify_add_or_sub (insn);
7291 if (negative == 0)
7292 {
7293 (*_bfd_error_handler)
7294 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
7295 input_bfd, input_section,
7296 (long) rel->r_offset, howto->name);
7297 return bfd_reloc_overflow;
7298 }
7299
7300 signed_addend *= negative;
7301 }
7302
7303 /* Compute the value (X) to go in the place. */
7304 if (r_type == R_ARM_ALU_PC_G0_NC
7305 || r_type == R_ARM_ALU_PC_G1_NC
7306 || r_type == R_ARM_ALU_PC_G0
7307 || r_type == R_ARM_ALU_PC_G1
7308 || r_type == R_ARM_ALU_PC_G2)
7309 /* PC relative. */
7310 signed_value = value - pc + signed_addend;
7311 else
7312 /* Section base relative. */
7313 signed_value = value - sb + signed_addend;
7314
7315 /* If the target symbol is a Thumb function, then set the
7316 Thumb bit in the address. */
7317 if (sym_flags == STT_ARM_TFUNC)
7318 signed_value |= 1;
7319
7320 /* Calculate the value of the relevant G_n, in encoded
7321 constant-with-rotation format. */
7322 g_n = calculate_group_reloc_mask (abs (signed_value), group,
7323 &residual);
7324
7325 /* Check for overflow if required. */
7326 if ((r_type == R_ARM_ALU_PC_G0
7327 || r_type == R_ARM_ALU_PC_G1
7328 || r_type == R_ARM_ALU_PC_G2
7329 || r_type == R_ARM_ALU_SB_G0
7330 || r_type == R_ARM_ALU_SB_G1
7331 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
7332 {
7333 (*_bfd_error_handler)
7334 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7335 input_bfd, input_section,
7336 (long) rel->r_offset, abs (signed_value), howto->name);
7337 return bfd_reloc_overflow;
7338 }
7339
7340 /* Mask out the value and the ADD/SUB part of the opcode; take care
7341 not to destroy the S bit. */
7342 insn &= 0xff1ff000;
7343
7344 /* Set the opcode according to whether the value to go in the
7345 place is negative. */
7346 if (signed_value < 0)
7347 insn |= 1 << 22;
7348 else
7349 insn |= 1 << 23;
7350
7351 /* Encode the offset. */
7352 insn |= g_n;
7353
7354 bfd_put_32 (input_bfd, insn, hit_data);
7355 }
7356 return bfd_reloc_ok;
7357
7358 case R_ARM_LDR_PC_G0:
7359 case R_ARM_LDR_PC_G1:
7360 case R_ARM_LDR_PC_G2:
7361 case R_ARM_LDR_SB_G0:
7362 case R_ARM_LDR_SB_G1:
7363 case R_ARM_LDR_SB_G2:
7364 {
7365 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7366 bfd_vma pc = input_section->output_section->vma
7367 + input_section->output_offset + rel->r_offset;
7368 bfd_vma sb = 0; /* See note above. */
7369 bfd_vma residual;
7370 bfd_signed_vma signed_value;
7371 int group = 0;
7372
7373 /* Determine which groups of bits to calculate. */
7374 switch (r_type)
7375 {
7376 case R_ARM_LDR_PC_G0:
7377 case R_ARM_LDR_SB_G0:
7378 group = 0;
7379 break;
7380
7381 case R_ARM_LDR_PC_G1:
7382 case R_ARM_LDR_SB_G1:
7383 group = 1;
7384 break;
7385
7386 case R_ARM_LDR_PC_G2:
7387 case R_ARM_LDR_SB_G2:
7388 group = 2;
7389 break;
7390
7391 default:
7392 abort ();
7393 }
7394
7395 /* If REL, extract the addend from the insn. If RELA, it will
7396 have already been fetched for us. */
7397 if (globals->use_rel)
7398 {
7399 int negative = (insn & (1 << 23)) ? 1 : -1;
7400 signed_addend = negative * (insn & 0xfff);
7401 }
7402
7403 /* Compute the value (X) to go in the place. */
7404 if (r_type == R_ARM_LDR_PC_G0
7405 || r_type == R_ARM_LDR_PC_G1
7406 || r_type == R_ARM_LDR_PC_G2)
7407 /* PC relative. */
7408 signed_value = value - pc + signed_addend;
7409 else
7410 /* Section base relative. */
7411 signed_value = value - sb + signed_addend;
7412
7413 /* Calculate the value of the relevant G_{n-1} to obtain
7414 the residual at that stage. */
7415 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7416
7417 /* Check for overflow. */
7418 if (residual >= 0x1000)
7419 {
7420 (*_bfd_error_handler)
7421 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7422 input_bfd, input_section,
7423 (long) rel->r_offset, abs (signed_value), howto->name);
7424 return bfd_reloc_overflow;
7425 }
7426
7427 /* Mask out the value and U bit. */
7428 insn &= 0xff7ff000;
7429
7430 /* Set the U bit if the value to go in the place is non-negative. */
7431 if (signed_value >= 0)
7432 insn |= 1 << 23;
7433
7434 /* Encode the offset. */
7435 insn |= residual;
7436
7437 bfd_put_32 (input_bfd, insn, hit_data);
7438 }
7439 return bfd_reloc_ok;
7440
7441 case R_ARM_LDRS_PC_G0:
7442 case R_ARM_LDRS_PC_G1:
7443 case R_ARM_LDRS_PC_G2:
7444 case R_ARM_LDRS_SB_G0:
7445 case R_ARM_LDRS_SB_G1:
7446 case R_ARM_LDRS_SB_G2:
7447 {
7448 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7449 bfd_vma pc = input_section->output_section->vma
7450 + input_section->output_offset + rel->r_offset;
7451 bfd_vma sb = 0; /* See note above. */
7452 bfd_vma residual;
7453 bfd_signed_vma signed_value;
7454 int group = 0;
7455
7456 /* Determine which groups of bits to calculate. */
7457 switch (r_type)
7458 {
7459 case R_ARM_LDRS_PC_G0:
7460 case R_ARM_LDRS_SB_G0:
7461 group = 0;
7462 break;
7463
7464 case R_ARM_LDRS_PC_G1:
7465 case R_ARM_LDRS_SB_G1:
7466 group = 1;
7467 break;
7468
7469 case R_ARM_LDRS_PC_G2:
7470 case R_ARM_LDRS_SB_G2:
7471 group = 2;
7472 break;
7473
7474 default:
7475 abort ();
7476 }
7477
7478 /* If REL, extract the addend from the insn. If RELA, it will
7479 have already been fetched for us. */
7480 if (globals->use_rel)
7481 {
7482 int negative = (insn & (1 << 23)) ? 1 : -1;
7483 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
7484 }
7485
7486 /* Compute the value (X) to go in the place. */
7487 if (r_type == R_ARM_LDRS_PC_G0
7488 || r_type == R_ARM_LDRS_PC_G1
7489 || r_type == R_ARM_LDRS_PC_G2)
7490 /* PC relative. */
7491 signed_value = value - pc + signed_addend;
7492 else
7493 /* Section base relative. */
7494 signed_value = value - sb + signed_addend;
7495
7496 /* Calculate the value of the relevant G_{n-1} to obtain
7497 the residual at that stage. */
7498 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7499
7500 /* Check for overflow. */
7501 if (residual >= 0x100)
7502 {
7503 (*_bfd_error_handler)
7504 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7505 input_bfd, input_section,
7506 (long) rel->r_offset, abs (signed_value), howto->name);
7507 return bfd_reloc_overflow;
7508 }
7509
7510 /* Mask out the value and U bit. */
7511 insn &= 0xff7ff0f0;
7512
7513 /* Set the U bit if the value to go in the place is non-negative. */
7514 if (signed_value >= 0)
7515 insn |= 1 << 23;
7516
7517 /* Encode the offset. */
7518 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
7519
7520 bfd_put_32 (input_bfd, insn, hit_data);
7521 }
7522 return bfd_reloc_ok;
7523
7524 case R_ARM_LDC_PC_G0:
7525 case R_ARM_LDC_PC_G1:
7526 case R_ARM_LDC_PC_G2:
7527 case R_ARM_LDC_SB_G0:
7528 case R_ARM_LDC_SB_G1:
7529 case R_ARM_LDC_SB_G2:
7530 {
7531 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7532 bfd_vma pc = input_section->output_section->vma
7533 + input_section->output_offset + rel->r_offset;
7534 bfd_vma sb = 0; /* See note above. */
7535 bfd_vma residual;
7536 bfd_signed_vma signed_value;
7537 int group = 0;
7538
7539 /* Determine which groups of bits to calculate. */
7540 switch (r_type)
7541 {
7542 case R_ARM_LDC_PC_G0:
7543 case R_ARM_LDC_SB_G0:
7544 group = 0;
7545 break;
7546
7547 case R_ARM_LDC_PC_G1:
7548 case R_ARM_LDC_SB_G1:
7549 group = 1;
7550 break;
7551
7552 case R_ARM_LDC_PC_G2:
7553 case R_ARM_LDC_SB_G2:
7554 group = 2;
7555 break;
7556
7557 default:
7558 abort ();
7559 }
7560
7561 /* If REL, extract the addend from the insn. If RELA, it will
7562 have already been fetched for us. */
7563 if (globals->use_rel)
7564 {
7565 int negative = (insn & (1 << 23)) ? 1 : -1;
7566 signed_addend = negative * ((insn & 0xff) << 2);
7567 }
7568
7569 /* Compute the value (X) to go in the place. */
7570 if (r_type == R_ARM_LDC_PC_G0
7571 || r_type == R_ARM_LDC_PC_G1
7572 || r_type == R_ARM_LDC_PC_G2)
7573 /* PC relative. */
7574 signed_value = value - pc + signed_addend;
7575 else
7576 /* Section base relative. */
7577 signed_value = value - sb + signed_addend;
7578
7579 /* Calculate the value of the relevant G_{n-1} to obtain
7580 the residual at that stage. */
7581 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7582
7583 /* Check for overflow. (The absolute value to go in the place must be
7584 divisible by four and, after having been divided by four, must
7585 fit in eight bits.) */
7586 if ((residual & 0x3) != 0 || residual >= 0x400)
7587 {
7588 (*_bfd_error_handler)
7589 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7590 input_bfd, input_section,
7591 (long) rel->r_offset, abs (signed_value), howto->name);
7592 return bfd_reloc_overflow;
7593 }
7594
7595 /* Mask out the value and U bit. */
7596 insn &= 0xff7fff00;
7597
7598 /* Set the U bit if the value to go in the place is non-negative. */
7599 if (signed_value >= 0)
7600 insn |= 1 << 23;
7601
7602 /* Encode the offset. */
7603 insn |= residual >> 2;
7604
7605 bfd_put_32 (input_bfd, insn, hit_data);
7606 }
7607 return bfd_reloc_ok;
7608
7609 default:
7610 return bfd_reloc_notsupported;
7611 }
7612 }
7613
7614 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
7615 static void
7616 arm_add_to_rel (bfd * abfd,
7617 bfd_byte * address,
7618 reloc_howto_type * howto,
7619 bfd_signed_vma increment)
7620 {
7621 bfd_signed_vma addend;
7622
7623 if (howto->type == R_ARM_THM_CALL
7624 || howto->type == R_ARM_THM_JUMP24)
7625 {
7626 int upper_insn, lower_insn;
7627 int upper, lower;
7628
7629 upper_insn = bfd_get_16 (abfd, address);
7630 lower_insn = bfd_get_16 (abfd, address + 2);
7631 upper = upper_insn & 0x7ff;
7632 lower = lower_insn & 0x7ff;
7633
7634 addend = (upper << 12) | (lower << 1);
7635 addend += increment;
7636 addend >>= 1;
7637
7638 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
7639 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
7640
7641 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
7642 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
7643 }
7644 else
7645 {
7646 bfd_vma contents;
7647
7648 contents = bfd_get_32 (abfd, address);
7649
7650 /* Get the (signed) value from the instruction. */
7651 addend = contents & howto->src_mask;
7652 if (addend & ((howto->src_mask + 1) >> 1))
7653 {
7654 bfd_signed_vma mask;
7655
7656 mask = -1;
7657 mask &= ~ howto->src_mask;
7658 addend |= mask;
7659 }
7660
7661 /* Add in the increment, (which is a byte value). */
7662 switch (howto->type)
7663 {
7664 default:
7665 addend += increment;
7666 break;
7667
7668 case R_ARM_PC24:
7669 case R_ARM_PLT32:
7670 case R_ARM_CALL:
7671 case R_ARM_JUMP24:
7672 addend <<= howto->size;
7673 addend += increment;
7674
7675 /* Should we check for overflow here ? */
7676
7677 /* Drop any undesired bits. */
7678 addend >>= howto->rightshift;
7679 break;
7680 }
7681
7682 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
7683
7684 bfd_put_32 (abfd, contents, address);
7685 }
7686 }
7687
7688 #define IS_ARM_TLS_RELOC(R_TYPE) \
7689 ((R_TYPE) == R_ARM_TLS_GD32 \
7690 || (R_TYPE) == R_ARM_TLS_LDO32 \
7691 || (R_TYPE) == R_ARM_TLS_LDM32 \
7692 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
7693 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
7694 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
7695 || (R_TYPE) == R_ARM_TLS_LE32 \
7696 || (R_TYPE) == R_ARM_TLS_IE32)
7697
7698 /* Relocate an ARM ELF section. */
7699
7700 static bfd_boolean
7701 elf32_arm_relocate_section (bfd * output_bfd,
7702 struct bfd_link_info * info,
7703 bfd * input_bfd,
7704 asection * input_section,
7705 bfd_byte * contents,
7706 Elf_Internal_Rela * relocs,
7707 Elf_Internal_Sym * local_syms,
7708 asection ** local_sections)
7709 {
7710 Elf_Internal_Shdr *symtab_hdr;
7711 struct elf_link_hash_entry **sym_hashes;
7712 Elf_Internal_Rela *rel;
7713 Elf_Internal_Rela *relend;
7714 const char *name;
7715 struct elf32_arm_link_hash_table * globals;
7716
7717 globals = elf32_arm_hash_table (info);
7718
7719 symtab_hdr = & elf_symtab_hdr (input_bfd);
7720 sym_hashes = elf_sym_hashes (input_bfd);
7721
7722 rel = relocs;
7723 relend = relocs + input_section->reloc_count;
7724 for (; rel < relend; rel++)
7725 {
7726 int r_type;
7727 reloc_howto_type * howto;
7728 unsigned long r_symndx;
7729 Elf_Internal_Sym * sym;
7730 asection * sec;
7731 struct elf_link_hash_entry * h;
7732 bfd_vma relocation;
7733 bfd_reloc_status_type r;
7734 arelent bfd_reloc;
7735 char sym_type;
7736 bfd_boolean unresolved_reloc = FALSE;
7737 char *error_message = NULL;
7738
7739 r_symndx = ELF32_R_SYM (rel->r_info);
7740 r_type = ELF32_R_TYPE (rel->r_info);
7741 r_type = arm_real_reloc_type (globals, r_type);
7742
7743 if ( r_type == R_ARM_GNU_VTENTRY
7744 || r_type == R_ARM_GNU_VTINHERIT)
7745 continue;
7746
7747 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
7748 howto = bfd_reloc.howto;
7749
7750 h = NULL;
7751 sym = NULL;
7752 sec = NULL;
7753
7754 if (r_symndx < symtab_hdr->sh_info)
7755 {
7756 sym = local_syms + r_symndx;
7757 sym_type = ELF32_ST_TYPE (sym->st_info);
7758 sec = local_sections[r_symndx];
7759 if (globals->use_rel)
7760 {
7761 relocation = (sec->output_section->vma
7762 + sec->output_offset
7763 + sym->st_value);
7764 if (!info->relocatable
7765 && (sec->flags & SEC_MERGE)
7766 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
7767 {
7768 asection *msec;
7769 bfd_vma addend, value;
7770
7771 switch (r_type)
7772 {
7773 case R_ARM_MOVW_ABS_NC:
7774 case R_ARM_MOVT_ABS:
7775 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7776 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
7777 addend = (addend ^ 0x8000) - 0x8000;
7778 break;
7779
7780 case R_ARM_THM_MOVW_ABS_NC:
7781 case R_ARM_THM_MOVT_ABS:
7782 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
7783 << 16;
7784 value |= bfd_get_16 (input_bfd,
7785 contents + rel->r_offset + 2);
7786 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
7787 | ((value & 0x04000000) >> 15);
7788 addend = (addend ^ 0x8000) - 0x8000;
7789 break;
7790
7791 default:
7792 if (howto->rightshift
7793 || (howto->src_mask & (howto->src_mask + 1)))
7794 {
7795 (*_bfd_error_handler)
7796 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
7797 input_bfd, input_section,
7798 (long) rel->r_offset, howto->name);
7799 return FALSE;
7800 }
7801
7802 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7803
7804 /* Get the (signed) value from the instruction. */
7805 addend = value & howto->src_mask;
7806 if (addend & ((howto->src_mask + 1) >> 1))
7807 {
7808 bfd_signed_vma mask;
7809
7810 mask = -1;
7811 mask &= ~ howto->src_mask;
7812 addend |= mask;
7813 }
7814 break;
7815 }
7816
7817 msec = sec;
7818 addend =
7819 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
7820 - relocation;
7821 addend += msec->output_section->vma + msec->output_offset;
7822
7823 /* Cases here must match those in the preceeding
7824 switch statement. */
7825 switch (r_type)
7826 {
7827 case R_ARM_MOVW_ABS_NC:
7828 case R_ARM_MOVT_ABS:
7829 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
7830 | (addend & 0xfff);
7831 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
7832 break;
7833
7834 case R_ARM_THM_MOVW_ABS_NC:
7835 case R_ARM_THM_MOVT_ABS:
7836 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
7837 | (addend & 0xff) | ((addend & 0x0800) << 15);
7838 bfd_put_16 (input_bfd, value >> 16,
7839 contents + rel->r_offset);
7840 bfd_put_16 (input_bfd, value,
7841 contents + rel->r_offset + 2);
7842 break;
7843
7844 default:
7845 value = (value & ~ howto->dst_mask)
7846 | (addend & howto->dst_mask);
7847 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
7848 break;
7849 }
7850 }
7851 }
7852 else
7853 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7854 }
7855 else
7856 {
7857 bfd_boolean warned;
7858
7859 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7860 r_symndx, symtab_hdr, sym_hashes,
7861 h, sec, relocation,
7862 unresolved_reloc, warned);
7863
7864 sym_type = h->type;
7865 }
7866
7867 if (sec != NULL && elf_discarded_section (sec))
7868 {
7869 /* For relocs against symbols from removed linkonce sections,
7870 or sections discarded by a linker script, we just want the
7871 section contents zeroed. Avoid any special processing. */
7872 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
7873 rel->r_info = 0;
7874 rel->r_addend = 0;
7875 continue;
7876 }
7877
7878 if (info->relocatable)
7879 {
7880 /* This is a relocatable link. We don't have to change
7881 anything, unless the reloc is against a section symbol,
7882 in which case we have to adjust according to where the
7883 section symbol winds up in the output section. */
7884 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
7885 {
7886 if (globals->use_rel)
7887 arm_add_to_rel (input_bfd, contents + rel->r_offset,
7888 howto, (bfd_signed_vma) sec->output_offset);
7889 else
7890 rel->r_addend += sec->output_offset;
7891 }
7892 continue;
7893 }
7894
7895 if (h != NULL)
7896 name = h->root.root.string;
7897 else
7898 {
7899 name = (bfd_elf_string_from_elf_section
7900 (input_bfd, symtab_hdr->sh_link, sym->st_name));
7901 if (name == NULL || *name == '\0')
7902 name = bfd_section_name (input_bfd, sec);
7903 }
7904
7905 if (r_symndx != 0
7906 && r_type != R_ARM_NONE
7907 && (h == NULL
7908 || h->root.type == bfd_link_hash_defined
7909 || h->root.type == bfd_link_hash_defweak)
7910 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7911 {
7912 (*_bfd_error_handler)
7913 ((sym_type == STT_TLS
7914 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
7915 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
7916 input_bfd,
7917 input_section,
7918 (long) rel->r_offset,
7919 howto->name,
7920 name);
7921 }
7922
7923 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
7924 input_section, contents, rel,
7925 relocation, info, sec, name,
7926 (h ? ELF_ST_TYPE (h->type) :
7927 ELF_ST_TYPE (sym->st_info)), h,
7928 &unresolved_reloc, &error_message);
7929
7930 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
7931 because such sections are not SEC_ALLOC and thus ld.so will
7932 not process them. */
7933 if (unresolved_reloc
7934 && !((input_section->flags & SEC_DEBUGGING) != 0
7935 && h->def_dynamic))
7936 {
7937 (*_bfd_error_handler)
7938 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7939 input_bfd,
7940 input_section,
7941 (long) rel->r_offset,
7942 howto->name,
7943 h->root.root.string);
7944 return FALSE;
7945 }
7946
7947 if (r != bfd_reloc_ok)
7948 {
7949 switch (r)
7950 {
7951 case bfd_reloc_overflow:
7952 /* If the overflowing reloc was to an undefined symbol,
7953 we have already printed one error message and there
7954 is no point complaining again. */
7955 if ((! h ||
7956 h->root.type != bfd_link_hash_undefined)
7957 && (!((*info->callbacks->reloc_overflow)
7958 (info, (h ? &h->root : NULL), name, howto->name,
7959 (bfd_vma) 0, input_bfd, input_section,
7960 rel->r_offset))))
7961 return FALSE;
7962 break;
7963
7964 case bfd_reloc_undefined:
7965 if (!((*info->callbacks->undefined_symbol)
7966 (info, name, input_bfd, input_section,
7967 rel->r_offset, TRUE)))
7968 return FALSE;
7969 break;
7970
7971 case bfd_reloc_outofrange:
7972 error_message = _("out of range");
7973 goto common_error;
7974
7975 case bfd_reloc_notsupported:
7976 error_message = _("unsupported relocation");
7977 goto common_error;
7978
7979 case bfd_reloc_dangerous:
7980 /* error_message should already be set. */
7981 goto common_error;
7982
7983 default:
7984 error_message = _("unknown error");
7985 /* Fall through. */
7986
7987 common_error:
7988 BFD_ASSERT (error_message != NULL);
7989 if (!((*info->callbacks->reloc_dangerous)
7990 (info, error_message, input_bfd, input_section,
7991 rel->r_offset)))
7992 return FALSE;
7993 break;
7994 }
7995 }
7996 }
7997
7998 return TRUE;
7999 }
8000
8001 /* Set the right machine number. */
8002
8003 static bfd_boolean
8004 elf32_arm_object_p (bfd *abfd)
8005 {
8006 unsigned int mach;
8007
8008 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
8009
8010 if (mach != bfd_mach_arm_unknown)
8011 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8012
8013 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
8014 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
8015
8016 else
8017 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8018
8019 return TRUE;
8020 }
8021
8022 /* Function to keep ARM specific flags in the ELF header. */
8023
8024 static bfd_boolean
8025 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
8026 {
8027 if (elf_flags_init (abfd)
8028 && elf_elfheader (abfd)->e_flags != flags)
8029 {
8030 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
8031 {
8032 if (flags & EF_ARM_INTERWORK)
8033 (*_bfd_error_handler)
8034 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
8035 abfd);
8036 else
8037 _bfd_error_handler
8038 (_("Warning: Clearing the interworking flag of %B due to outside request"),
8039 abfd);
8040 }
8041 }
8042 else
8043 {
8044 elf_elfheader (abfd)->e_flags = flags;
8045 elf_flags_init (abfd) = TRUE;
8046 }
8047
8048 return TRUE;
8049 }
8050
8051 /* Copy backend specific data from one object module to another. */
8052
8053 static bfd_boolean
8054 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
8055 {
8056 flagword in_flags;
8057 flagword out_flags;
8058
8059 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
8060 return TRUE;
8061
8062 in_flags = elf_elfheader (ibfd)->e_flags;
8063 out_flags = elf_elfheader (obfd)->e_flags;
8064
8065 if (elf_flags_init (obfd)
8066 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
8067 && in_flags != out_flags)
8068 {
8069 /* Cannot mix APCS26 and APCS32 code. */
8070 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
8071 return FALSE;
8072
8073 /* Cannot mix float APCS and non-float APCS code. */
8074 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
8075 return FALSE;
8076
8077 /* If the src and dest have different interworking flags
8078 then turn off the interworking bit. */
8079 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8080 {
8081 if (out_flags & EF_ARM_INTERWORK)
8082 _bfd_error_handler
8083 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
8084 obfd, ibfd);
8085
8086 in_flags &= ~EF_ARM_INTERWORK;
8087 }
8088
8089 /* Likewise for PIC, though don't warn for this case. */
8090 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
8091 in_flags &= ~EF_ARM_PIC;
8092 }
8093
8094 elf_elfheader (obfd)->e_flags = in_flags;
8095 elf_flags_init (obfd) = TRUE;
8096
8097 /* Also copy the EI_OSABI field. */
8098 elf_elfheader (obfd)->e_ident[EI_OSABI] =
8099 elf_elfheader (ibfd)->e_ident[EI_OSABI];
8100
8101 /* Copy object attributes. */
8102 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8103
8104 return TRUE;
8105 }
8106
8107 /* Values for Tag_ABI_PCS_R9_use. */
8108 enum
8109 {
8110 AEABI_R9_V6,
8111 AEABI_R9_SB,
8112 AEABI_R9_TLS,
8113 AEABI_R9_unused
8114 };
8115
8116 /* Values for Tag_ABI_PCS_RW_data. */
8117 enum
8118 {
8119 AEABI_PCS_RW_data_absolute,
8120 AEABI_PCS_RW_data_PCrel,
8121 AEABI_PCS_RW_data_SBrel,
8122 AEABI_PCS_RW_data_unused
8123 };
8124
8125 /* Values for Tag_ABI_enum_size. */
8126 enum
8127 {
8128 AEABI_enum_unused,
8129 AEABI_enum_short,
8130 AEABI_enum_wide,
8131 AEABI_enum_forced_wide
8132 };
8133
8134 /* Determine whether an object attribute tag takes an integer, a
8135 string or both. */
8136
8137 static int
8138 elf32_arm_obj_attrs_arg_type (int tag)
8139 {
8140 if (tag == Tag_compatibility)
8141 return 3;
8142 else if (tag == 4 || tag == 5)
8143 return 2;
8144 else if (tag < 32)
8145 return 1;
8146 else
8147 return (tag & 1) != 0 ? 2 : 1;
8148 }
8149
8150 static void
8151 elf32_arm_copy_one_eabi_other_attribute (bfd *ibfd, bfd *obfd, obj_attribute_list *in_list)
8152 {
8153 switch (in_list->tag)
8154 {
8155 case Tag_VFP_HP_extension:
8156 case Tag_ABI_FP_16bit_format:
8157 bfd_elf_add_obj_attr_int (obfd, OBJ_ATTR_PROC, in_list->tag, in_list->attr.i);
8158 break;
8159
8160 default:
8161 if ((in_list->tag & 127) < 64)
8162 {
8163 _bfd_error_handler
8164 (_("Warning: %B: Unknown EABI object attribute %d"), ibfd, in_list->tag);
8165 break;
8166 }
8167 }
8168 }
8169
8170 static void
8171 elf32_arm_copy_eabi_other_attribute_list (bfd *ibfd, bfd *obfd, obj_attribute_list *in_list)
8172 {
8173 for (; in_list; in_list = in_list->next )
8174 elf32_arm_copy_one_eabi_other_attribute (ibfd, obfd, in_list);
8175 }
8176
8177 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
8178 are conflicting attributes. */
8179
8180 static bfd_boolean
8181 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
8182 {
8183 obj_attribute *in_attr;
8184 obj_attribute *out_attr;
8185 obj_attribute_list *in_list;
8186 obj_attribute_list *out_list;
8187 /* Some tags have 0 = don't care, 1 = strong requirement,
8188 2 = weak requirement. */
8189 static const int order_312[3] = {3, 1, 2};
8190 /* For use with Tag_VFP_arch. */
8191 static const int order_01243[5] = {0, 1, 2, 4, 3};
8192 int i;
8193
8194 if (!elf_known_obj_attributes_proc (obfd)[0].i)
8195 {
8196 /* This is the first object. Copy the attributes. */
8197 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8198
8199 /* Use the Tag_null value to indicate the attributes have been
8200 initialized. */
8201 elf_known_obj_attributes_proc (obfd)[0].i = 1;
8202
8203 return TRUE;
8204 }
8205
8206 in_attr = elf_known_obj_attributes_proc (ibfd);
8207 out_attr = elf_known_obj_attributes_proc (obfd);
8208 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
8209 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
8210 {
8211 /* Ignore mismatches if the object doesn't use floating point. */
8212 if (out_attr[Tag_ABI_FP_number_model].i == 0)
8213 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
8214 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
8215 {
8216 _bfd_error_handler
8217 (_("ERROR: %B uses VFP register arguments, %B does not"),
8218 ibfd, obfd);
8219 return FALSE;
8220 }
8221 }
8222
8223 for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
8224 {
8225 /* Merge this attribute with existing attributes. */
8226 switch (i)
8227 {
8228 case Tag_CPU_raw_name:
8229 case Tag_CPU_name:
8230 /* Use whichever has the greatest architecture requirements. We
8231 won't necessarily have both the above tags, so make sure input
8232 name is non-NULL. */
8233 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i
8234 && in_attr[i].s)
8235 out_attr[i].s = _bfd_elf_attr_strdup (obfd, in_attr[i].s);
8236 break;
8237
8238 case Tag_ABI_optimization_goals:
8239 case Tag_ABI_FP_optimization_goals:
8240 /* Use the first value seen. */
8241 break;
8242
8243 case Tag_CPU_arch:
8244 case Tag_ARM_ISA_use:
8245 case Tag_THUMB_ISA_use:
8246 case Tag_WMMX_arch:
8247 case Tag_NEON_arch:
8248 /* ??? Do NEON and WMMX conflict? */
8249 case Tag_ABI_FP_rounding:
8250 case Tag_ABI_FP_denormal:
8251 case Tag_ABI_FP_exceptions:
8252 case Tag_ABI_FP_user_exceptions:
8253 case Tag_ABI_FP_number_model:
8254 case Tag_ABI_align8_preserved:
8255 case Tag_ABI_HardFP_use:
8256 /* Use the largest value specified. */
8257 if (in_attr[i].i > out_attr[i].i)
8258 out_attr[i].i = in_attr[i].i;
8259 break;
8260
8261 case Tag_CPU_arch_profile:
8262 /* Warn if conflicting architecture profiles used. */
8263 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
8264 {
8265 _bfd_error_handler
8266 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
8267 ibfd, in_attr[i].i, out_attr[i].i);
8268 return FALSE;
8269 }
8270 if (in_attr[i].i)
8271 out_attr[i].i = in_attr[i].i;
8272 break;
8273 case Tag_VFP_arch:
8274 if (in_attr[i].i > 4 || out_attr[i].i > 4
8275 || order_01243[in_attr[i].i] > order_01243[out_attr[i].i])
8276 out_attr[i].i = in_attr[i].i;
8277 break;
8278 case Tag_PCS_config:
8279 if (out_attr[i].i == 0)
8280 out_attr[i].i = in_attr[i].i;
8281 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
8282 {
8283 /* It's sometimes ok to mix different configs, so this is only
8284 a warning. */
8285 _bfd_error_handler
8286 (_("Warning: %B: Conflicting platform configuration"), ibfd);
8287 }
8288 break;
8289 case Tag_ABI_PCS_R9_use:
8290 if (in_attr[i].i != out_attr[i].i
8291 && out_attr[i].i != AEABI_R9_unused
8292 && in_attr[i].i != AEABI_R9_unused)
8293 {
8294 _bfd_error_handler
8295 (_("ERROR: %B: Conflicting use of R9"), ibfd);
8296 return FALSE;
8297 }
8298 if (out_attr[i].i == AEABI_R9_unused)
8299 out_attr[i].i = in_attr[i].i;
8300 break;
8301 case Tag_ABI_PCS_RW_data:
8302 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
8303 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
8304 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
8305 {
8306 _bfd_error_handler
8307 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
8308 ibfd);
8309 return FALSE;
8310 }
8311 /* Use the smallest value specified. */
8312 if (in_attr[i].i < out_attr[i].i)
8313 out_attr[i].i = in_attr[i].i;
8314 break;
8315 case Tag_ABI_PCS_RO_data:
8316 /* Use the smallest value specified. */
8317 if (in_attr[i].i < out_attr[i].i)
8318 out_attr[i].i = in_attr[i].i;
8319 break;
8320 case Tag_ABI_PCS_GOT_use:
8321 if (in_attr[i].i > 2 || out_attr[i].i > 2
8322 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
8323 out_attr[i].i = in_attr[i].i;
8324 break;
8325 case Tag_ABI_PCS_wchar_t:
8326 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
8327 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
8328 {
8329 _bfd_error_handler
8330 (_("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"),
8331 ibfd, in_attr[i].i, out_attr[i].i);
8332 }
8333 else if (in_attr[i].i && !out_attr[i].i)
8334 out_attr[i].i = in_attr[i].i;
8335 break;
8336 case Tag_ABI_align8_needed:
8337 /* ??? Check against Tag_ABI_align8_preserved. */
8338 if (in_attr[i].i > 2 || out_attr[i].i > 2
8339 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
8340 out_attr[i].i = in_attr[i].i;
8341 break;
8342 case Tag_ABI_enum_size:
8343 if (in_attr[i].i != AEABI_enum_unused)
8344 {
8345 if (out_attr[i].i == AEABI_enum_unused
8346 || out_attr[i].i == AEABI_enum_forced_wide)
8347 {
8348 /* The existing object is compatible with anything.
8349 Use whatever requirements the new object has. */
8350 out_attr[i].i = in_attr[i].i;
8351 }
8352 else if (in_attr[i].i != AEABI_enum_forced_wide
8353 && out_attr[i].i != in_attr[i].i
8354 && !elf_arm_tdata (obfd)->no_enum_size_warning)
8355 {
8356 const char *aeabi_enum_names[] =
8357 { "", "variable-size", "32-bit", "" };
8358 _bfd_error_handler
8359 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
8360 ibfd, aeabi_enum_names[in_attr[i].i],
8361 aeabi_enum_names[out_attr[i].i]);
8362 }
8363 }
8364 break;
8365 case Tag_ABI_VFP_args:
8366 /* Aready done. */
8367 break;
8368 case Tag_ABI_WMMX_args:
8369 if (in_attr[i].i != out_attr[i].i)
8370 {
8371 _bfd_error_handler
8372 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
8373 ibfd, obfd);
8374 return FALSE;
8375 }
8376 break;
8377
8378 default: /* All known attributes should be explicitly covered. */
8379 abort ();
8380 }
8381
8382 if (in_attr[i].type && !out_attr[i].type)
8383 switch (in_attr[i].type)
8384 {
8385 case 1:
8386 if (out_attr[i].i)
8387 out_attr[i].type = 1;
8388 break;
8389
8390 case 2:
8391 if (out_attr[i].s)
8392 out_attr[i].type = 2;
8393 break;
8394
8395 default:
8396 abort ();
8397 }
8398 }
8399
8400 /* Merge Tag_compatibility attributes and any common GNU ones. */
8401 _bfd_elf_merge_object_attributes (ibfd, obfd);
8402
8403 /* Check for any attributes not known on ARM. */
8404 in_list = elf_other_obj_attributes_proc (ibfd);
8405 while (in_list && in_list->tag == Tag_compatibility)
8406 in_list = in_list->next;
8407
8408 out_list = elf_other_obj_attributes_proc (obfd);
8409 while (out_list && out_list->tag == Tag_compatibility)
8410 out_list = out_list->next;
8411
8412 for (; in_list != NULL; )
8413 {
8414 if (out_list == NULL)
8415 {
8416 elf32_arm_copy_eabi_other_attribute_list (ibfd, obfd, in_list);
8417 return TRUE;
8418 }
8419
8420 /* The tags for each list are in numerical order. */
8421 /* If the tags are equal, then merge. */
8422 if (in_list->tag == out_list->tag)
8423 {
8424 switch (in_list->tag)
8425 {
8426 case Tag_VFP_HP_extension:
8427 if (out_list->attr.i == 0)
8428 out_list->attr.i = in_list->attr.i;
8429 break;
8430
8431 case Tag_ABI_FP_16bit_format:
8432 if (in_list->attr.i != 0 && out_list->attr.i != 0)
8433 {
8434 if (in_list->attr.i != out_list->attr.i)
8435 {
8436 _bfd_error_handler
8437 (_("ERROR: fp16 format mismatch between %B and %B"),
8438 ibfd, obfd);
8439 return FALSE;
8440 }
8441 }
8442 if (in_list->attr.i != 0)
8443 out_list->attr.i = in_list->attr.i;
8444 break;
8445
8446 default:
8447 if ((in_list->tag & 127) < 64)
8448 {
8449 _bfd_error_handler
8450 (_("Warning: %B: Unknown EABI object attribute %d"), ibfd, in_list->tag);
8451 break;
8452 }
8453 }
8454 }
8455 else if (in_list->tag < out_list->tag)
8456 {
8457 /* This attribute is in ibfd, but not obfd. Copy to obfd and advance to
8458 next input attribute. */
8459 elf32_arm_copy_one_eabi_other_attribute (ibfd, obfd, in_list);
8460 }
8461 if (in_list->tag <= out_list->tag)
8462 {
8463 in_list = in_list->next;
8464 if (in_list == NULL)
8465 continue;
8466 }
8467 while (out_list && out_list->tag < in_list->tag)
8468 out_list = out_list->next;
8469 }
8470 return TRUE;
8471 }
8472
8473
8474 /* Return TRUE if the two EABI versions are incompatible. */
8475
8476 static bfd_boolean
8477 elf32_arm_versions_compatible (unsigned iver, unsigned over)
8478 {
8479 /* v4 and v5 are the same spec before and after it was released,
8480 so allow mixing them. */
8481 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
8482 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
8483 return TRUE;
8484
8485 return (iver == over);
8486 }
8487
8488 /* Merge backend specific data from an object file to the output
8489 object file when linking. */
8490
8491 static bfd_boolean
8492 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
8493 {
8494 flagword out_flags;
8495 flagword in_flags;
8496 bfd_boolean flags_compatible = TRUE;
8497 asection *sec;
8498
8499 /* Check if we have the same endianess. */
8500 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
8501 return FALSE;
8502
8503 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
8504 return TRUE;
8505
8506 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
8507 return FALSE;
8508
8509 /* The input BFD must have had its flags initialised. */
8510 /* The following seems bogus to me -- The flags are initialized in
8511 the assembler but I don't think an elf_flags_init field is
8512 written into the object. */
8513 /* BFD_ASSERT (elf_flags_init (ibfd)); */
8514
8515 in_flags = elf_elfheader (ibfd)->e_flags;
8516 out_flags = elf_elfheader (obfd)->e_flags;
8517
8518 /* In theory there is no reason why we couldn't handle this. However
8519 in practice it isn't even close to working and there is no real
8520 reason to want it. */
8521 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
8522 && !(ibfd->flags & DYNAMIC)
8523 && (in_flags & EF_ARM_BE8))
8524 {
8525 _bfd_error_handler (_("ERROR: %B is already in final BE8 format"),
8526 ibfd);
8527 return FALSE;
8528 }
8529
8530 if (!elf_flags_init (obfd))
8531 {
8532 /* If the input is the default architecture and had the default
8533 flags then do not bother setting the flags for the output
8534 architecture, instead allow future merges to do this. If no
8535 future merges ever set these flags then they will retain their
8536 uninitialised values, which surprise surprise, correspond
8537 to the default values. */
8538 if (bfd_get_arch_info (ibfd)->the_default
8539 && elf_elfheader (ibfd)->e_flags == 0)
8540 return TRUE;
8541
8542 elf_flags_init (obfd) = TRUE;
8543 elf_elfheader (obfd)->e_flags = in_flags;
8544
8545 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
8546 && bfd_get_arch_info (obfd)->the_default)
8547 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
8548
8549 return TRUE;
8550 }
8551
8552 /* Determine what should happen if the input ARM architecture
8553 does not match the output ARM architecture. */
8554 if (! bfd_arm_merge_machines (ibfd, obfd))
8555 return FALSE;
8556
8557 /* Identical flags must be compatible. */
8558 if (in_flags == out_flags)
8559 return TRUE;
8560
8561 /* Check to see if the input BFD actually contains any sections. If
8562 not, its flags may not have been initialised either, but it
8563 cannot actually cause any incompatiblity. Do not short-circuit
8564 dynamic objects; their section list may be emptied by
8565 elf_link_add_object_symbols.
8566
8567 Also check to see if there are no code sections in the input.
8568 In this case there is no need to check for code specific flags.
8569 XXX - do we need to worry about floating-point format compatability
8570 in data sections ? */
8571 if (!(ibfd->flags & DYNAMIC))
8572 {
8573 bfd_boolean null_input_bfd = TRUE;
8574 bfd_boolean only_data_sections = TRUE;
8575
8576 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8577 {
8578 /* Ignore synthetic glue sections. */
8579 if (strcmp (sec->name, ".glue_7")
8580 && strcmp (sec->name, ".glue_7t"))
8581 {
8582 if ((bfd_get_section_flags (ibfd, sec)
8583 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
8584 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
8585 only_data_sections = FALSE;
8586
8587 null_input_bfd = FALSE;
8588 break;
8589 }
8590 }
8591
8592 if (null_input_bfd || only_data_sections)
8593 return TRUE;
8594 }
8595
8596 /* Complain about various flag mismatches. */
8597 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
8598 EF_ARM_EABI_VERSION (out_flags)))
8599 {
8600 _bfd_error_handler
8601 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
8602 ibfd, obfd,
8603 (in_flags & EF_ARM_EABIMASK) >> 24,
8604 (out_flags & EF_ARM_EABIMASK) >> 24);
8605 return FALSE;
8606 }
8607
8608 /* Not sure what needs to be checked for EABI versions >= 1. */
8609 /* VxWorks libraries do not use these flags. */
8610 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
8611 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
8612 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
8613 {
8614 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
8615 {
8616 _bfd_error_handler
8617 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
8618 ibfd, obfd,
8619 in_flags & EF_ARM_APCS_26 ? 26 : 32,
8620 out_flags & EF_ARM_APCS_26 ? 26 : 32);
8621 flags_compatible = FALSE;
8622 }
8623
8624 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
8625 {
8626 if (in_flags & EF_ARM_APCS_FLOAT)
8627 _bfd_error_handler
8628 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
8629 ibfd, obfd);
8630 else
8631 _bfd_error_handler
8632 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
8633 ibfd, obfd);
8634
8635 flags_compatible = FALSE;
8636 }
8637
8638 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
8639 {
8640 if (in_flags & EF_ARM_VFP_FLOAT)
8641 _bfd_error_handler
8642 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
8643 ibfd, obfd);
8644 else
8645 _bfd_error_handler
8646 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
8647 ibfd, obfd);
8648
8649 flags_compatible = FALSE;
8650 }
8651
8652 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
8653 {
8654 if (in_flags & EF_ARM_MAVERICK_FLOAT)
8655 _bfd_error_handler
8656 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
8657 ibfd, obfd);
8658 else
8659 _bfd_error_handler
8660 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
8661 ibfd, obfd);
8662
8663 flags_compatible = FALSE;
8664 }
8665
8666 #ifdef EF_ARM_SOFT_FLOAT
8667 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
8668 {
8669 /* We can allow interworking between code that is VFP format
8670 layout, and uses either soft float or integer regs for
8671 passing floating point arguments and results. We already
8672 know that the APCS_FLOAT flags match; similarly for VFP
8673 flags. */
8674 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
8675 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
8676 {
8677 if (in_flags & EF_ARM_SOFT_FLOAT)
8678 _bfd_error_handler
8679 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
8680 ibfd, obfd);
8681 else
8682 _bfd_error_handler
8683 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
8684 ibfd, obfd);
8685
8686 flags_compatible = FALSE;
8687 }
8688 }
8689 #endif
8690
8691 /* Interworking mismatch is only a warning. */
8692 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8693 {
8694 if (in_flags & EF_ARM_INTERWORK)
8695 {
8696 _bfd_error_handler
8697 (_("Warning: %B supports interworking, whereas %B does not"),
8698 ibfd, obfd);
8699 }
8700 else
8701 {
8702 _bfd_error_handler
8703 (_("Warning: %B does not support interworking, whereas %B does"),
8704 ibfd, obfd);
8705 }
8706 }
8707 }
8708
8709 return flags_compatible;
8710 }
8711
8712 /* Display the flags field. */
8713
8714 static bfd_boolean
8715 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
8716 {
8717 FILE * file = (FILE *) ptr;
8718 unsigned long flags;
8719
8720 BFD_ASSERT (abfd != NULL && ptr != NULL);
8721
8722 /* Print normal ELF private data. */
8723 _bfd_elf_print_private_bfd_data (abfd, ptr);
8724
8725 flags = elf_elfheader (abfd)->e_flags;
8726 /* Ignore init flag - it may not be set, despite the flags field
8727 containing valid data. */
8728
8729 /* xgettext:c-format */
8730 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
8731
8732 switch (EF_ARM_EABI_VERSION (flags))
8733 {
8734 case EF_ARM_EABI_UNKNOWN:
8735 /* The following flag bits are GNU extensions and not part of the
8736 official ARM ELF extended ABI. Hence they are only decoded if
8737 the EABI version is not set. */
8738 if (flags & EF_ARM_INTERWORK)
8739 fprintf (file, _(" [interworking enabled]"));
8740
8741 if (flags & EF_ARM_APCS_26)
8742 fprintf (file, " [APCS-26]");
8743 else
8744 fprintf (file, " [APCS-32]");
8745
8746 if (flags & EF_ARM_VFP_FLOAT)
8747 fprintf (file, _(" [VFP float format]"));
8748 else if (flags & EF_ARM_MAVERICK_FLOAT)
8749 fprintf (file, _(" [Maverick float format]"));
8750 else
8751 fprintf (file, _(" [FPA float format]"));
8752
8753 if (flags & EF_ARM_APCS_FLOAT)
8754 fprintf (file, _(" [floats passed in float registers]"));
8755
8756 if (flags & EF_ARM_PIC)
8757 fprintf (file, _(" [position independent]"));
8758
8759 if (flags & EF_ARM_NEW_ABI)
8760 fprintf (file, _(" [new ABI]"));
8761
8762 if (flags & EF_ARM_OLD_ABI)
8763 fprintf (file, _(" [old ABI]"));
8764
8765 if (flags & EF_ARM_SOFT_FLOAT)
8766 fprintf (file, _(" [software FP]"));
8767
8768 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
8769 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
8770 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
8771 | EF_ARM_MAVERICK_FLOAT);
8772 break;
8773
8774 case EF_ARM_EABI_VER1:
8775 fprintf (file, _(" [Version1 EABI]"));
8776
8777 if (flags & EF_ARM_SYMSARESORTED)
8778 fprintf (file, _(" [sorted symbol table]"));
8779 else
8780 fprintf (file, _(" [unsorted symbol table]"));
8781
8782 flags &= ~ EF_ARM_SYMSARESORTED;
8783 break;
8784
8785 case EF_ARM_EABI_VER2:
8786 fprintf (file, _(" [Version2 EABI]"));
8787
8788 if (flags & EF_ARM_SYMSARESORTED)
8789 fprintf (file, _(" [sorted symbol table]"));
8790 else
8791 fprintf (file, _(" [unsorted symbol table]"));
8792
8793 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
8794 fprintf (file, _(" [dynamic symbols use segment index]"));
8795
8796 if (flags & EF_ARM_MAPSYMSFIRST)
8797 fprintf (file, _(" [mapping symbols precede others]"));
8798
8799 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
8800 | EF_ARM_MAPSYMSFIRST);
8801 break;
8802
8803 case EF_ARM_EABI_VER3:
8804 fprintf (file, _(" [Version3 EABI]"));
8805 break;
8806
8807 case EF_ARM_EABI_VER4:
8808 fprintf (file, _(" [Version4 EABI]"));
8809 goto eabi;
8810
8811 case EF_ARM_EABI_VER5:
8812 fprintf (file, _(" [Version5 EABI]"));
8813 eabi:
8814 if (flags & EF_ARM_BE8)
8815 fprintf (file, _(" [BE8]"));
8816
8817 if (flags & EF_ARM_LE8)
8818 fprintf (file, _(" [LE8]"));
8819
8820 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
8821 break;
8822
8823 default:
8824 fprintf (file, _(" <EABI version unrecognised>"));
8825 break;
8826 }
8827
8828 flags &= ~ EF_ARM_EABIMASK;
8829
8830 if (flags & EF_ARM_RELEXEC)
8831 fprintf (file, _(" [relocatable executable]"));
8832
8833 if (flags & EF_ARM_HASENTRY)
8834 fprintf (file, _(" [has entry point]"));
8835
8836 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
8837
8838 if (flags)
8839 fprintf (file, _("<Unrecognised flag bits set>"));
8840
8841 fputc ('\n', file);
8842
8843 return TRUE;
8844 }
8845
8846 static int
8847 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
8848 {
8849 switch (ELF_ST_TYPE (elf_sym->st_info))
8850 {
8851 case STT_ARM_TFUNC:
8852 return ELF_ST_TYPE (elf_sym->st_info);
8853
8854 case STT_ARM_16BIT:
8855 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
8856 This allows us to distinguish between data used by Thumb instructions
8857 and non-data (which is probably code) inside Thumb regions of an
8858 executable. */
8859 if (type != STT_OBJECT && type != STT_TLS)
8860 return ELF_ST_TYPE (elf_sym->st_info);
8861 break;
8862
8863 default:
8864 break;
8865 }
8866
8867 return type;
8868 }
8869
8870 static asection *
8871 elf32_arm_gc_mark_hook (asection *sec,
8872 struct bfd_link_info *info,
8873 Elf_Internal_Rela *rel,
8874 struct elf_link_hash_entry *h,
8875 Elf_Internal_Sym *sym)
8876 {
8877 if (h != NULL)
8878 switch (ELF32_R_TYPE (rel->r_info))
8879 {
8880 case R_ARM_GNU_VTINHERIT:
8881 case R_ARM_GNU_VTENTRY:
8882 return NULL;
8883 }
8884
8885 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
8886 }
8887
8888 /* Update the got entry reference counts for the section being removed. */
8889
8890 static bfd_boolean
8891 elf32_arm_gc_sweep_hook (bfd * abfd,
8892 struct bfd_link_info * info,
8893 asection * sec,
8894 const Elf_Internal_Rela * relocs)
8895 {
8896 Elf_Internal_Shdr *symtab_hdr;
8897 struct elf_link_hash_entry **sym_hashes;
8898 bfd_signed_vma *local_got_refcounts;
8899 const Elf_Internal_Rela *rel, *relend;
8900 struct elf32_arm_link_hash_table * globals;
8901
8902 if (info->relocatable)
8903 return TRUE;
8904
8905 globals = elf32_arm_hash_table (info);
8906
8907 elf_section_data (sec)->local_dynrel = NULL;
8908
8909 symtab_hdr = & elf_symtab_hdr (abfd);
8910 sym_hashes = elf_sym_hashes (abfd);
8911 local_got_refcounts = elf_local_got_refcounts (abfd);
8912
8913 check_use_blx (globals);
8914
8915 relend = relocs + sec->reloc_count;
8916 for (rel = relocs; rel < relend; rel++)
8917 {
8918 unsigned long r_symndx;
8919 struct elf_link_hash_entry *h = NULL;
8920 int r_type;
8921
8922 r_symndx = ELF32_R_SYM (rel->r_info);
8923 if (r_symndx >= symtab_hdr->sh_info)
8924 {
8925 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8926 while (h->root.type == bfd_link_hash_indirect
8927 || h->root.type == bfd_link_hash_warning)
8928 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8929 }
8930
8931 r_type = ELF32_R_TYPE (rel->r_info);
8932 r_type = arm_real_reloc_type (globals, r_type);
8933 switch (r_type)
8934 {
8935 case R_ARM_GOT32:
8936 case R_ARM_GOT_PREL:
8937 case R_ARM_TLS_GD32:
8938 case R_ARM_TLS_IE32:
8939 if (h != NULL)
8940 {
8941 if (h->got.refcount > 0)
8942 h->got.refcount -= 1;
8943 }
8944 else if (local_got_refcounts != NULL)
8945 {
8946 if (local_got_refcounts[r_symndx] > 0)
8947 local_got_refcounts[r_symndx] -= 1;
8948 }
8949 break;
8950
8951 case R_ARM_TLS_LDM32:
8952 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
8953 break;
8954
8955 case R_ARM_ABS32:
8956 case R_ARM_ABS32_NOI:
8957 case R_ARM_REL32:
8958 case R_ARM_REL32_NOI:
8959 case R_ARM_PC24:
8960 case R_ARM_PLT32:
8961 case R_ARM_CALL:
8962 case R_ARM_JUMP24:
8963 case R_ARM_PREL31:
8964 case R_ARM_THM_CALL:
8965 case R_ARM_THM_JUMP24:
8966 case R_ARM_THM_JUMP19:
8967 case R_ARM_MOVW_ABS_NC:
8968 case R_ARM_MOVT_ABS:
8969 case R_ARM_MOVW_PREL_NC:
8970 case R_ARM_MOVT_PREL:
8971 case R_ARM_THM_MOVW_ABS_NC:
8972 case R_ARM_THM_MOVT_ABS:
8973 case R_ARM_THM_MOVW_PREL_NC:
8974 case R_ARM_THM_MOVT_PREL:
8975 /* Should the interworking branches be here also? */
8976
8977 if (h != NULL)
8978 {
8979 struct elf32_arm_link_hash_entry *eh;
8980 struct elf32_arm_relocs_copied **pp;
8981 struct elf32_arm_relocs_copied *p;
8982
8983 eh = (struct elf32_arm_link_hash_entry *) h;
8984
8985 if (h->plt.refcount > 0)
8986 {
8987 h->plt.refcount -= 1;
8988 if (r_type == R_ARM_THM_CALL)
8989 eh->plt_maybe_thumb_refcount--;
8990
8991 if (r_type == R_ARM_THM_JUMP24
8992 || r_type == R_ARM_THM_JUMP19)
8993 eh->plt_thumb_refcount--;
8994 }
8995
8996 if (r_type == R_ARM_ABS32
8997 || r_type == R_ARM_REL32
8998 || r_type == R_ARM_ABS32_NOI
8999 || r_type == R_ARM_REL32_NOI)
9000 {
9001 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
9002 pp = &p->next)
9003 if (p->section == sec)
9004 {
9005 p->count -= 1;
9006 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
9007 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
9008 p->pc_count -= 1;
9009 if (p->count == 0)
9010 *pp = p->next;
9011 break;
9012 }
9013 }
9014 }
9015 break;
9016
9017 default:
9018 break;
9019 }
9020 }
9021
9022 return TRUE;
9023 }
9024
9025 /* Look through the relocs for a section during the first phase. */
9026
9027 static bfd_boolean
9028 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
9029 asection *sec, const Elf_Internal_Rela *relocs)
9030 {
9031 Elf_Internal_Shdr *symtab_hdr;
9032 struct elf_link_hash_entry **sym_hashes;
9033 const Elf_Internal_Rela *rel;
9034 const Elf_Internal_Rela *rel_end;
9035 bfd *dynobj;
9036 asection *sreloc;
9037 bfd_vma *local_got_offsets;
9038 struct elf32_arm_link_hash_table *htab;
9039 bfd_boolean needs_plt;
9040
9041 if (info->relocatable)
9042 return TRUE;
9043
9044 BFD_ASSERT (is_arm_elf (abfd));
9045
9046 htab = elf32_arm_hash_table (info);
9047 sreloc = NULL;
9048
9049 /* Create dynamic sections for relocatable executables so that we can
9050 copy relocations. */
9051 if (htab->root.is_relocatable_executable
9052 && ! htab->root.dynamic_sections_created)
9053 {
9054 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
9055 return FALSE;
9056 }
9057
9058 dynobj = elf_hash_table (info)->dynobj;
9059 local_got_offsets = elf_local_got_offsets (abfd);
9060
9061 symtab_hdr = & elf_symtab_hdr (abfd);
9062 sym_hashes = elf_sym_hashes (abfd);
9063
9064 rel_end = relocs + sec->reloc_count;
9065 for (rel = relocs; rel < rel_end; rel++)
9066 {
9067 struct elf_link_hash_entry *h;
9068 struct elf32_arm_link_hash_entry *eh;
9069 unsigned long r_symndx;
9070 int r_type;
9071
9072 r_symndx = ELF32_R_SYM (rel->r_info);
9073 r_type = ELF32_R_TYPE (rel->r_info);
9074 r_type = arm_real_reloc_type (htab, r_type);
9075
9076 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
9077 {
9078 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
9079 r_symndx);
9080 return FALSE;
9081 }
9082
9083 if (r_symndx < symtab_hdr->sh_info)
9084 h = NULL;
9085 else
9086 {
9087 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9088 while (h->root.type == bfd_link_hash_indirect
9089 || h->root.type == bfd_link_hash_warning)
9090 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9091 }
9092
9093 eh = (struct elf32_arm_link_hash_entry *) h;
9094
9095 switch (r_type)
9096 {
9097 case R_ARM_GOT32:
9098 case R_ARM_GOT_PREL:
9099 case R_ARM_TLS_GD32:
9100 case R_ARM_TLS_IE32:
9101 /* This symbol requires a global offset table entry. */
9102 {
9103 int tls_type, old_tls_type;
9104
9105 switch (r_type)
9106 {
9107 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
9108 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
9109 default: tls_type = GOT_NORMAL; break;
9110 }
9111
9112 if (h != NULL)
9113 {
9114 h->got.refcount++;
9115 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
9116 }
9117 else
9118 {
9119 bfd_signed_vma *local_got_refcounts;
9120
9121 /* This is a global offset table entry for a local symbol. */
9122 local_got_refcounts = elf_local_got_refcounts (abfd);
9123 if (local_got_refcounts == NULL)
9124 {
9125 bfd_size_type size;
9126
9127 size = symtab_hdr->sh_info;
9128 size *= (sizeof (bfd_signed_vma) + sizeof (char));
9129 local_got_refcounts = bfd_zalloc (abfd, size);
9130 if (local_got_refcounts == NULL)
9131 return FALSE;
9132 elf_local_got_refcounts (abfd) = local_got_refcounts;
9133 elf32_arm_local_got_tls_type (abfd)
9134 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
9135 }
9136 local_got_refcounts[r_symndx] += 1;
9137 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
9138 }
9139
9140 /* We will already have issued an error message if there is a
9141 TLS / non-TLS mismatch, based on the symbol type. We don't
9142 support any linker relaxations. So just combine any TLS
9143 types needed. */
9144 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
9145 && tls_type != GOT_NORMAL)
9146 tls_type |= old_tls_type;
9147
9148 if (old_tls_type != tls_type)
9149 {
9150 if (h != NULL)
9151 elf32_arm_hash_entry (h)->tls_type = tls_type;
9152 else
9153 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
9154 }
9155 }
9156 /* Fall through. */
9157
9158 case R_ARM_TLS_LDM32:
9159 if (r_type == R_ARM_TLS_LDM32)
9160 htab->tls_ldm_got.refcount++;
9161 /* Fall through. */
9162
9163 case R_ARM_GOTOFF32:
9164 case R_ARM_GOTPC:
9165 if (htab->sgot == NULL)
9166 {
9167 if (htab->root.dynobj == NULL)
9168 htab->root.dynobj = abfd;
9169 if (!create_got_section (htab->root.dynobj, info))
9170 return FALSE;
9171 }
9172 break;
9173
9174 case R_ARM_ABS12:
9175 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
9176 ldr __GOTT_INDEX__ offsets. */
9177 if (!htab->vxworks_p)
9178 break;
9179 /* Fall through. */
9180
9181 case R_ARM_PC24:
9182 case R_ARM_PLT32:
9183 case R_ARM_CALL:
9184 case R_ARM_JUMP24:
9185 case R_ARM_PREL31:
9186 case R_ARM_THM_CALL:
9187 case R_ARM_THM_JUMP24:
9188 case R_ARM_THM_JUMP19:
9189 needs_plt = 1;
9190 goto normal_reloc;
9191
9192 case R_ARM_ABS32:
9193 case R_ARM_ABS32_NOI:
9194 case R_ARM_REL32:
9195 case R_ARM_REL32_NOI:
9196 case R_ARM_MOVW_ABS_NC:
9197 case R_ARM_MOVT_ABS:
9198 case R_ARM_MOVW_PREL_NC:
9199 case R_ARM_MOVT_PREL:
9200 case R_ARM_THM_MOVW_ABS_NC:
9201 case R_ARM_THM_MOVT_ABS:
9202 case R_ARM_THM_MOVW_PREL_NC:
9203 case R_ARM_THM_MOVT_PREL:
9204 needs_plt = 0;
9205 normal_reloc:
9206
9207 /* Should the interworking branches be listed here? */
9208 if (h != NULL)
9209 {
9210 /* If this reloc is in a read-only section, we might
9211 need a copy reloc. We can't check reliably at this
9212 stage whether the section is read-only, as input
9213 sections have not yet been mapped to output sections.
9214 Tentatively set the flag for now, and correct in
9215 adjust_dynamic_symbol. */
9216 if (!info->shared)
9217 h->non_got_ref = 1;
9218
9219 /* We may need a .plt entry if the function this reloc
9220 refers to is in a different object. We can't tell for
9221 sure yet, because something later might force the
9222 symbol local. */
9223 if (needs_plt)
9224 h->needs_plt = 1;
9225
9226 /* If we create a PLT entry, this relocation will reference
9227 it, even if it's an ABS32 relocation. */
9228 h->plt.refcount += 1;
9229
9230 /* It's too early to use htab->use_blx here, so we have to
9231 record possible blx references separately from
9232 relocs that definitely need a thumb stub. */
9233
9234 if (r_type == R_ARM_THM_CALL)
9235 eh->plt_maybe_thumb_refcount += 1;
9236
9237 if (r_type == R_ARM_THM_JUMP24
9238 || r_type == R_ARM_THM_JUMP19)
9239 eh->plt_thumb_refcount += 1;
9240 }
9241
9242 /* If we are creating a shared library or relocatable executable,
9243 and this is a reloc against a global symbol, or a non PC
9244 relative reloc against a local symbol, then we need to copy
9245 the reloc into the shared library. However, if we are linking
9246 with -Bsymbolic, we do not need to copy a reloc against a
9247 global symbol which is defined in an object we are
9248 including in the link (i.e., DEF_REGULAR is set). At
9249 this point we have not seen all the input files, so it is
9250 possible that DEF_REGULAR is not set now but will be set
9251 later (it is never cleared). We account for that
9252 possibility below by storing information in the
9253 relocs_copied field of the hash table entry. */
9254 if ((info->shared || htab->root.is_relocatable_executable)
9255 && (sec->flags & SEC_ALLOC) != 0
9256 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
9257 || (h != NULL && ! h->needs_plt
9258 && (! info->symbolic || ! h->def_regular))))
9259 {
9260 struct elf32_arm_relocs_copied *p, **head;
9261
9262 /* When creating a shared object, we must copy these
9263 reloc types into the output file. We create a reloc
9264 section in dynobj and make room for this reloc. */
9265 if (sreloc == NULL)
9266 {
9267 sreloc = _bfd_elf_make_dynamic_reloc_section
9268 (sec, dynobj, 2, abfd, ! htab->use_rel);
9269
9270 if (sreloc == NULL)
9271 return FALSE;
9272
9273 /* BPABI objects never have dynamic relocations mapped. */
9274 if (! htab->symbian_p)
9275 {
9276 flagword flags;
9277
9278 flags = bfd_get_section_flags (dynobj, sreloc);
9279 flags &= ~(SEC_LOAD | SEC_ALLOC);
9280 bfd_set_section_flags (dynobj, sreloc, flags);
9281 }
9282 }
9283
9284 /* If this is a global symbol, we count the number of
9285 relocations we need for this symbol. */
9286 if (h != NULL)
9287 {
9288 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
9289 }
9290 else
9291 {
9292 /* Track dynamic relocs needed for local syms too.
9293 We really need local syms available to do this
9294 easily. Oh well. */
9295
9296 asection *s;
9297 void *vpp;
9298
9299 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
9300 sec, r_symndx);
9301 if (s == NULL)
9302 return FALSE;
9303
9304 vpp = &elf_section_data (s)->local_dynrel;
9305 head = (struct elf32_arm_relocs_copied **) vpp;
9306 }
9307
9308 p = *head;
9309 if (p == NULL || p->section != sec)
9310 {
9311 bfd_size_type amt = sizeof *p;
9312
9313 p = bfd_alloc (htab->root.dynobj, amt);
9314 if (p == NULL)
9315 return FALSE;
9316 p->next = *head;
9317 *head = p;
9318 p->section = sec;
9319 p->count = 0;
9320 p->pc_count = 0;
9321 }
9322
9323 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
9324 p->pc_count += 1;
9325 p->count += 1;
9326 }
9327 break;
9328
9329 /* This relocation describes the C++ object vtable hierarchy.
9330 Reconstruct it for later use during GC. */
9331 case R_ARM_GNU_VTINHERIT:
9332 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
9333 return FALSE;
9334 break;
9335
9336 /* This relocation describes which C++ vtable entries are actually
9337 used. Record for later use during GC. */
9338 case R_ARM_GNU_VTENTRY:
9339 BFD_ASSERT (h != NULL);
9340 if (h != NULL
9341 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
9342 return FALSE;
9343 break;
9344 }
9345 }
9346
9347 return TRUE;
9348 }
9349
9350 /* Unwinding tables are not referenced directly. This pass marks them as
9351 required if the corresponding code section is marked. */
9352
9353 static bfd_boolean
9354 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
9355 elf_gc_mark_hook_fn gc_mark_hook)
9356 {
9357 bfd *sub;
9358 Elf_Internal_Shdr **elf_shdrp;
9359 bfd_boolean again;
9360
9361 /* Marking EH data may cause additional code sections to be marked,
9362 requiring multiple passes. */
9363 again = TRUE;
9364 while (again)
9365 {
9366 again = FALSE;
9367 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
9368 {
9369 asection *o;
9370
9371 if (! is_arm_elf (sub))
9372 continue;
9373
9374 elf_shdrp = elf_elfsections (sub);
9375 for (o = sub->sections; o != NULL; o = o->next)
9376 {
9377 Elf_Internal_Shdr *hdr;
9378
9379 hdr = &elf_section_data (o)->this_hdr;
9380 if (hdr->sh_type == SHT_ARM_EXIDX
9381 && hdr->sh_link
9382 && hdr->sh_link < elf_numsections (sub)
9383 && !o->gc_mark
9384 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
9385 {
9386 again = TRUE;
9387 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
9388 return FALSE;
9389 }
9390 }
9391 }
9392 }
9393
9394 return TRUE;
9395 }
9396
9397 /* Treat mapping symbols as special target symbols. */
9398
9399 static bfd_boolean
9400 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
9401 {
9402 return bfd_is_arm_special_symbol_name (sym->name,
9403 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
9404 }
9405
9406 /* This is a copy of elf_find_function() from elf.c except that
9407 ARM mapping symbols are ignored when looking for function names
9408 and STT_ARM_TFUNC is considered to a function type. */
9409
9410 static bfd_boolean
9411 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
9412 asection * section,
9413 asymbol ** symbols,
9414 bfd_vma offset,
9415 const char ** filename_ptr,
9416 const char ** functionname_ptr)
9417 {
9418 const char * filename = NULL;
9419 asymbol * func = NULL;
9420 bfd_vma low_func = 0;
9421 asymbol ** p;
9422
9423 for (p = symbols; *p != NULL; p++)
9424 {
9425 elf_symbol_type *q;
9426
9427 q = (elf_symbol_type *) *p;
9428
9429 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
9430 {
9431 default:
9432 break;
9433 case STT_FILE:
9434 filename = bfd_asymbol_name (&q->symbol);
9435 break;
9436 case STT_FUNC:
9437 case STT_ARM_TFUNC:
9438 case STT_NOTYPE:
9439 /* Skip mapping symbols. */
9440 if ((q->symbol.flags & BSF_LOCAL)
9441 && bfd_is_arm_special_symbol_name (q->symbol.name,
9442 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
9443 continue;
9444 /* Fall through. */
9445 if (bfd_get_section (&q->symbol) == section
9446 && q->symbol.value >= low_func
9447 && q->symbol.value <= offset)
9448 {
9449 func = (asymbol *) q;
9450 low_func = q->symbol.value;
9451 }
9452 break;
9453 }
9454 }
9455
9456 if (func == NULL)
9457 return FALSE;
9458
9459 if (filename_ptr)
9460 *filename_ptr = filename;
9461 if (functionname_ptr)
9462 *functionname_ptr = bfd_asymbol_name (func);
9463
9464 return TRUE;
9465 }
9466
9467
9468 /* Find the nearest line to a particular section and offset, for error
9469 reporting. This code is a duplicate of the code in elf.c, except
9470 that it uses arm_elf_find_function. */
9471
9472 static bfd_boolean
9473 elf32_arm_find_nearest_line (bfd * abfd,
9474 asection * section,
9475 asymbol ** symbols,
9476 bfd_vma offset,
9477 const char ** filename_ptr,
9478 const char ** functionname_ptr,
9479 unsigned int * line_ptr)
9480 {
9481 bfd_boolean found = FALSE;
9482
9483 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
9484
9485 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
9486 filename_ptr, functionname_ptr,
9487 line_ptr, 0,
9488 & elf_tdata (abfd)->dwarf2_find_line_info))
9489 {
9490 if (!*functionname_ptr)
9491 arm_elf_find_function (abfd, section, symbols, offset,
9492 *filename_ptr ? NULL : filename_ptr,
9493 functionname_ptr);
9494
9495 return TRUE;
9496 }
9497
9498 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
9499 & found, filename_ptr,
9500 functionname_ptr, line_ptr,
9501 & elf_tdata (abfd)->line_info))
9502 return FALSE;
9503
9504 if (found && (*functionname_ptr || *line_ptr))
9505 return TRUE;
9506
9507 if (symbols == NULL)
9508 return FALSE;
9509
9510 if (! arm_elf_find_function (abfd, section, symbols, offset,
9511 filename_ptr, functionname_ptr))
9512 return FALSE;
9513
9514 *line_ptr = 0;
9515 return TRUE;
9516 }
9517
9518 static bfd_boolean
9519 elf32_arm_find_inliner_info (bfd * abfd,
9520 const char ** filename_ptr,
9521 const char ** functionname_ptr,
9522 unsigned int * line_ptr)
9523 {
9524 bfd_boolean found;
9525 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
9526 functionname_ptr, line_ptr,
9527 & elf_tdata (abfd)->dwarf2_find_line_info);
9528 return found;
9529 }
9530
9531 /* Adjust a symbol defined by a dynamic object and referenced by a
9532 regular object. The current definition is in some section of the
9533 dynamic object, but we're not including those sections. We have to
9534 change the definition to something the rest of the link can
9535 understand. */
9536
9537 static bfd_boolean
9538 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
9539 struct elf_link_hash_entry * h)
9540 {
9541 bfd * dynobj;
9542 asection * s;
9543 struct elf32_arm_link_hash_entry * eh;
9544 struct elf32_arm_link_hash_table *globals;
9545
9546 globals = elf32_arm_hash_table (info);
9547 dynobj = elf_hash_table (info)->dynobj;
9548
9549 /* Make sure we know what is going on here. */
9550 BFD_ASSERT (dynobj != NULL
9551 && (h->needs_plt
9552 || h->u.weakdef != NULL
9553 || (h->def_dynamic
9554 && h->ref_regular
9555 && !h->def_regular)));
9556
9557 eh = (struct elf32_arm_link_hash_entry *) h;
9558
9559 /* If this is a function, put it in the procedure linkage table. We
9560 will fill in the contents of the procedure linkage table later,
9561 when we know the address of the .got section. */
9562 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
9563 || h->needs_plt)
9564 {
9565 if (h->plt.refcount <= 0
9566 || SYMBOL_CALLS_LOCAL (info, h)
9567 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
9568 && h->root.type == bfd_link_hash_undefweak))
9569 {
9570 /* This case can occur if we saw a PLT32 reloc in an input
9571 file, but the symbol was never referred to by a dynamic
9572 object, or if all references were garbage collected. In
9573 such a case, we don't actually need to build a procedure
9574 linkage table, and we can just do a PC24 reloc instead. */
9575 h->plt.offset = (bfd_vma) -1;
9576 eh->plt_thumb_refcount = 0;
9577 eh->plt_maybe_thumb_refcount = 0;
9578 h->needs_plt = 0;
9579 }
9580
9581 return TRUE;
9582 }
9583 else
9584 {
9585 /* It's possible that we incorrectly decided a .plt reloc was
9586 needed for an R_ARM_PC24 or similar reloc to a non-function sym
9587 in check_relocs. We can't decide accurately between function
9588 and non-function syms in check-relocs; Objects loaded later in
9589 the link may change h->type. So fix it now. */
9590 h->plt.offset = (bfd_vma) -1;
9591 eh->plt_thumb_refcount = 0;
9592 eh->plt_maybe_thumb_refcount = 0;
9593 }
9594
9595 /* If this is a weak symbol, and there is a real definition, the
9596 processor independent code will have arranged for us to see the
9597 real definition first, and we can just use the same value. */
9598 if (h->u.weakdef != NULL)
9599 {
9600 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
9601 || h->u.weakdef->root.type == bfd_link_hash_defweak);
9602 h->root.u.def.section = h->u.weakdef->root.u.def.section;
9603 h->root.u.def.value = h->u.weakdef->root.u.def.value;
9604 return TRUE;
9605 }
9606
9607 /* If there are no non-GOT references, we do not need a copy
9608 relocation. */
9609 if (!h->non_got_ref)
9610 return TRUE;
9611
9612 /* This is a reference to a symbol defined by a dynamic object which
9613 is not a function. */
9614
9615 /* If we are creating a shared library, we must presume that the
9616 only references to the symbol are via the global offset table.
9617 For such cases we need not do anything here; the relocations will
9618 be handled correctly by relocate_section. Relocatable executables
9619 can reference data in shared objects directly, so we don't need to
9620 do anything here. */
9621 if (info->shared || globals->root.is_relocatable_executable)
9622 return TRUE;
9623
9624 if (h->size == 0)
9625 {
9626 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
9627 h->root.root.string);
9628 return TRUE;
9629 }
9630
9631 /* We must allocate the symbol in our .dynbss section, which will
9632 become part of the .bss section of the executable. There will be
9633 an entry for this symbol in the .dynsym section. The dynamic
9634 object will contain position independent code, so all references
9635 from the dynamic object to this symbol will go through the global
9636 offset table. The dynamic linker will use the .dynsym entry to
9637 determine the address it must put in the global offset table, so
9638 both the dynamic object and the regular object will refer to the
9639 same memory location for the variable. */
9640 s = bfd_get_section_by_name (dynobj, ".dynbss");
9641 BFD_ASSERT (s != NULL);
9642
9643 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
9644 copy the initial value out of the dynamic object and into the
9645 runtime process image. We need to remember the offset into the
9646 .rel(a).bss section we are going to use. */
9647 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
9648 {
9649 asection *srel;
9650
9651 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
9652 BFD_ASSERT (srel != NULL);
9653 srel->size += RELOC_SIZE (globals);
9654 h->needs_copy = 1;
9655 }
9656
9657 return _bfd_elf_adjust_dynamic_copy (h, s);
9658 }
9659
9660 /* Allocate space in .plt, .got and associated reloc sections for
9661 dynamic relocs. */
9662
9663 static bfd_boolean
9664 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
9665 {
9666 struct bfd_link_info *info;
9667 struct elf32_arm_link_hash_table *htab;
9668 struct elf32_arm_link_hash_entry *eh;
9669 struct elf32_arm_relocs_copied *p;
9670 bfd_signed_vma thumb_refs;
9671
9672 eh = (struct elf32_arm_link_hash_entry *) h;
9673
9674 if (h->root.type == bfd_link_hash_indirect)
9675 return TRUE;
9676
9677 if (h->root.type == bfd_link_hash_warning)
9678 /* When warning symbols are created, they **replace** the "real"
9679 entry in the hash table, thus we never get to see the real
9680 symbol in a hash traversal. So look at it now. */
9681 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9682
9683 info = (struct bfd_link_info *) inf;
9684 htab = elf32_arm_hash_table (info);
9685
9686 if (htab->root.dynamic_sections_created
9687 && h->plt.refcount > 0)
9688 {
9689 /* Make sure this symbol is output as a dynamic symbol.
9690 Undefined weak syms won't yet be marked as dynamic. */
9691 if (h->dynindx == -1
9692 && !h->forced_local)
9693 {
9694 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9695 return FALSE;
9696 }
9697
9698 if (info->shared
9699 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
9700 {
9701 asection *s = htab->splt;
9702
9703 /* If this is the first .plt entry, make room for the special
9704 first entry. */
9705 if (s->size == 0)
9706 s->size += htab->plt_header_size;
9707
9708 h->plt.offset = s->size;
9709
9710 /* If we will insert a Thumb trampoline before this PLT, leave room
9711 for it. */
9712 thumb_refs = eh->plt_thumb_refcount;
9713 if (!htab->use_blx)
9714 thumb_refs += eh->plt_maybe_thumb_refcount;
9715
9716 if (thumb_refs > 0)
9717 {
9718 h->plt.offset += PLT_THUMB_STUB_SIZE;
9719 s->size += PLT_THUMB_STUB_SIZE;
9720 }
9721
9722 /* If this symbol is not defined in a regular file, and we are
9723 not generating a shared library, then set the symbol to this
9724 location in the .plt. This is required to make function
9725 pointers compare as equal between the normal executable and
9726 the shared library. */
9727 if (! info->shared
9728 && !h->def_regular)
9729 {
9730 h->root.u.def.section = s;
9731 h->root.u.def.value = h->plt.offset;
9732
9733 /* Make sure the function is not marked as Thumb, in case
9734 it is the target of an ABS32 relocation, which will
9735 point to the PLT entry. */
9736 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
9737 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
9738 }
9739
9740 /* Make room for this entry. */
9741 s->size += htab->plt_entry_size;
9742
9743 if (!htab->symbian_p)
9744 {
9745 /* We also need to make an entry in the .got.plt section, which
9746 will be placed in the .got section by the linker script. */
9747 eh->plt_got_offset = htab->sgotplt->size;
9748 htab->sgotplt->size += 4;
9749 }
9750
9751 /* We also need to make an entry in the .rel(a).plt section. */
9752 htab->srelplt->size += RELOC_SIZE (htab);
9753
9754 /* VxWorks executables have a second set of relocations for
9755 each PLT entry. They go in a separate relocation section,
9756 which is processed by the kernel loader. */
9757 if (htab->vxworks_p && !info->shared)
9758 {
9759 /* There is a relocation for the initial PLT entry:
9760 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
9761 if (h->plt.offset == htab->plt_header_size)
9762 htab->srelplt2->size += RELOC_SIZE (htab);
9763
9764 /* There are two extra relocations for each subsequent
9765 PLT entry: an R_ARM_32 relocation for the GOT entry,
9766 and an R_ARM_32 relocation for the PLT entry. */
9767 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
9768 }
9769 }
9770 else
9771 {
9772 h->plt.offset = (bfd_vma) -1;
9773 h->needs_plt = 0;
9774 }
9775 }
9776 else
9777 {
9778 h->plt.offset = (bfd_vma) -1;
9779 h->needs_plt = 0;
9780 }
9781
9782 if (h->got.refcount > 0)
9783 {
9784 asection *s;
9785 bfd_boolean dyn;
9786 int tls_type = elf32_arm_hash_entry (h)->tls_type;
9787 int indx;
9788
9789 /* Make sure this symbol is output as a dynamic symbol.
9790 Undefined weak syms won't yet be marked as dynamic. */
9791 if (h->dynindx == -1
9792 && !h->forced_local)
9793 {
9794 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9795 return FALSE;
9796 }
9797
9798 if (!htab->symbian_p)
9799 {
9800 s = htab->sgot;
9801 h->got.offset = s->size;
9802
9803 if (tls_type == GOT_UNKNOWN)
9804 abort ();
9805
9806 if (tls_type == GOT_NORMAL)
9807 /* Non-TLS symbols need one GOT slot. */
9808 s->size += 4;
9809 else
9810 {
9811 if (tls_type & GOT_TLS_GD)
9812 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
9813 s->size += 8;
9814 if (tls_type & GOT_TLS_IE)
9815 /* R_ARM_TLS_IE32 needs one GOT slot. */
9816 s->size += 4;
9817 }
9818
9819 dyn = htab->root.dynamic_sections_created;
9820
9821 indx = 0;
9822 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
9823 && (!info->shared
9824 || !SYMBOL_REFERENCES_LOCAL (info, h)))
9825 indx = h->dynindx;
9826
9827 if (tls_type != GOT_NORMAL
9828 && (info->shared || indx != 0)
9829 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9830 || h->root.type != bfd_link_hash_undefweak))
9831 {
9832 if (tls_type & GOT_TLS_IE)
9833 htab->srelgot->size += RELOC_SIZE (htab);
9834
9835 if (tls_type & GOT_TLS_GD)
9836 htab->srelgot->size += RELOC_SIZE (htab);
9837
9838 if ((tls_type & GOT_TLS_GD) && indx != 0)
9839 htab->srelgot->size += RELOC_SIZE (htab);
9840 }
9841 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9842 || h->root.type != bfd_link_hash_undefweak)
9843 && (info->shared
9844 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
9845 htab->srelgot->size += RELOC_SIZE (htab);
9846 }
9847 }
9848 else
9849 h->got.offset = (bfd_vma) -1;
9850
9851 /* Allocate stubs for exported Thumb functions on v4t. */
9852 if (!htab->use_blx && h->dynindx != -1
9853 && h->def_regular
9854 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
9855 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9856 {
9857 struct elf_link_hash_entry * th;
9858 struct bfd_link_hash_entry * bh;
9859 struct elf_link_hash_entry * myh;
9860 char name[1024];
9861 asection *s;
9862 bh = NULL;
9863 /* Create a new symbol to regist the real location of the function. */
9864 s = h->root.u.def.section;
9865 sprintf (name, "__real_%s", h->root.root.string);
9866 _bfd_generic_link_add_one_symbol (info, s->owner,
9867 name, BSF_GLOBAL, s,
9868 h->root.u.def.value,
9869 NULL, TRUE, FALSE, &bh);
9870
9871 myh = (struct elf_link_hash_entry *) bh;
9872 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
9873 myh->forced_local = 1;
9874 eh->export_glue = myh;
9875 th = record_arm_to_thumb_glue (info, h);
9876 /* Point the symbol at the stub. */
9877 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
9878 h->root.u.def.section = th->root.u.def.section;
9879 h->root.u.def.value = th->root.u.def.value & ~1;
9880 }
9881
9882 if (eh->relocs_copied == NULL)
9883 return TRUE;
9884
9885 /* In the shared -Bsymbolic case, discard space allocated for
9886 dynamic pc-relative relocs against symbols which turn out to be
9887 defined in regular objects. For the normal shared case, discard
9888 space for pc-relative relocs that have become local due to symbol
9889 visibility changes. */
9890
9891 if (info->shared || htab->root.is_relocatable_executable)
9892 {
9893 /* The only relocs that use pc_count are R_ARM_REL32 and
9894 R_ARM_REL32_NOI, which will appear on something like
9895 ".long foo - .". We want calls to protected symbols to resolve
9896 directly to the function rather than going via the plt. If people
9897 want function pointer comparisons to work as expected then they
9898 should avoid writing assembly like ".long foo - .". */
9899 if (SYMBOL_CALLS_LOCAL (info, h))
9900 {
9901 struct elf32_arm_relocs_copied **pp;
9902
9903 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
9904 {
9905 p->count -= p->pc_count;
9906 p->pc_count = 0;
9907 if (p->count == 0)
9908 *pp = p->next;
9909 else
9910 pp = &p->next;
9911 }
9912 }
9913
9914 if (elf32_arm_hash_table (info)->vxworks_p)
9915 {
9916 struct elf32_arm_relocs_copied **pp;
9917
9918 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
9919 {
9920 if (strcmp (p->section->output_section->name, ".tls_vars") == 0)
9921 *pp = p->next;
9922 else
9923 pp = &p->next;
9924 }
9925 }
9926
9927 /* Also discard relocs on undefined weak syms with non-default
9928 visibility. */
9929 if (eh->relocs_copied != NULL
9930 && h->root.type == bfd_link_hash_undefweak)
9931 {
9932 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9933 eh->relocs_copied = NULL;
9934
9935 /* Make sure undefined weak symbols are output as a dynamic
9936 symbol in PIEs. */
9937 else if (h->dynindx == -1
9938 && !h->forced_local)
9939 {
9940 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9941 return FALSE;
9942 }
9943 }
9944
9945 else if (htab->root.is_relocatable_executable && h->dynindx == -1
9946 && h->root.type == bfd_link_hash_new)
9947 {
9948 /* Output absolute symbols so that we can create relocations
9949 against them. For normal symbols we output a relocation
9950 against the section that contains them. */
9951 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9952 return FALSE;
9953 }
9954
9955 }
9956 else
9957 {
9958 /* For the non-shared case, discard space for relocs against
9959 symbols which turn out to need copy relocs or are not
9960 dynamic. */
9961
9962 if (!h->non_got_ref
9963 && ((h->def_dynamic
9964 && !h->def_regular)
9965 || (htab->root.dynamic_sections_created
9966 && (h->root.type == bfd_link_hash_undefweak
9967 || h->root.type == bfd_link_hash_undefined))))
9968 {
9969 /* Make sure this symbol is output as a dynamic symbol.
9970 Undefined weak syms won't yet be marked as dynamic. */
9971 if (h->dynindx == -1
9972 && !h->forced_local)
9973 {
9974 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9975 return FALSE;
9976 }
9977
9978 /* If that succeeded, we know we'll be keeping all the
9979 relocs. */
9980 if (h->dynindx != -1)
9981 goto keep;
9982 }
9983
9984 eh->relocs_copied = NULL;
9985
9986 keep: ;
9987 }
9988
9989 /* Finally, allocate space. */
9990 for (p = eh->relocs_copied; p != NULL; p = p->next)
9991 {
9992 asection *sreloc = elf_section_data (p->section)->sreloc;
9993 sreloc->size += p->count * RELOC_SIZE (htab);
9994 }
9995
9996 return TRUE;
9997 }
9998
9999 /* Find any dynamic relocs that apply to read-only sections. */
10000
10001 static bfd_boolean
10002 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
10003 {
10004 struct elf32_arm_link_hash_entry * eh;
10005 struct elf32_arm_relocs_copied * p;
10006
10007 if (h->root.type == bfd_link_hash_warning)
10008 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10009
10010 eh = (struct elf32_arm_link_hash_entry *) h;
10011 for (p = eh->relocs_copied; p != NULL; p = p->next)
10012 {
10013 asection *s = p->section;
10014
10015 if (s != NULL && (s->flags & SEC_READONLY) != 0)
10016 {
10017 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10018
10019 info->flags |= DF_TEXTREL;
10020
10021 /* Not an error, just cut short the traversal. */
10022 return FALSE;
10023 }
10024 }
10025 return TRUE;
10026 }
10027
10028 void
10029 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
10030 int byteswap_code)
10031 {
10032 struct elf32_arm_link_hash_table *globals;
10033
10034 globals = elf32_arm_hash_table (info);
10035 globals->byteswap_code = byteswap_code;
10036 }
10037
10038 /* Set the sizes of the dynamic sections. */
10039
10040 static bfd_boolean
10041 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
10042 struct bfd_link_info * info)
10043 {
10044 bfd * dynobj;
10045 asection * s;
10046 bfd_boolean plt;
10047 bfd_boolean relocs;
10048 bfd *ibfd;
10049 struct elf32_arm_link_hash_table *htab;
10050
10051 htab = elf32_arm_hash_table (info);
10052 dynobj = elf_hash_table (info)->dynobj;
10053 BFD_ASSERT (dynobj != NULL);
10054 check_use_blx (htab);
10055
10056 if (elf_hash_table (info)->dynamic_sections_created)
10057 {
10058 /* Set the contents of the .interp section to the interpreter. */
10059 if (info->executable)
10060 {
10061 s = bfd_get_section_by_name (dynobj, ".interp");
10062 BFD_ASSERT (s != NULL);
10063 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10064 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10065 }
10066 }
10067
10068 /* Set up .got offsets for local syms, and space for local dynamic
10069 relocs. */
10070 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10071 {
10072 bfd_signed_vma *local_got;
10073 bfd_signed_vma *end_local_got;
10074 char *local_tls_type;
10075 bfd_size_type locsymcount;
10076 Elf_Internal_Shdr *symtab_hdr;
10077 asection *srel;
10078 bfd_boolean is_vxworks = elf32_arm_hash_table (info)->vxworks_p;
10079
10080 if (! is_arm_elf (ibfd))
10081 continue;
10082
10083 for (s = ibfd->sections; s != NULL; s = s->next)
10084 {
10085 struct elf32_arm_relocs_copied *p;
10086
10087 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10088 {
10089 if (!bfd_is_abs_section (p->section)
10090 && bfd_is_abs_section (p->section->output_section))
10091 {
10092 /* Input section has been discarded, either because
10093 it is a copy of a linkonce section or due to
10094 linker script /DISCARD/, so we'll be discarding
10095 the relocs too. */
10096 }
10097 else if (is_vxworks
10098 && strcmp (p->section->output_section->name,
10099 ".tls_vars") == 0)
10100 {
10101 /* Relocations in vxworks .tls_vars sections are
10102 handled specially by the loader. */
10103 }
10104 else if (p->count != 0)
10105 {
10106 srel = elf_section_data (p->section)->sreloc;
10107 srel->size += p->count * RELOC_SIZE (htab);
10108 if ((p->section->output_section->flags & SEC_READONLY) != 0)
10109 info->flags |= DF_TEXTREL;
10110 }
10111 }
10112 }
10113
10114 local_got = elf_local_got_refcounts (ibfd);
10115 if (!local_got)
10116 continue;
10117
10118 symtab_hdr = & elf_symtab_hdr (ibfd);
10119 locsymcount = symtab_hdr->sh_info;
10120 end_local_got = local_got + locsymcount;
10121 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
10122 s = htab->sgot;
10123 srel = htab->srelgot;
10124 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
10125 {
10126 if (*local_got > 0)
10127 {
10128 *local_got = s->size;
10129 if (*local_tls_type & GOT_TLS_GD)
10130 /* TLS_GD relocs need an 8-byte structure in the GOT. */
10131 s->size += 8;
10132 if (*local_tls_type & GOT_TLS_IE)
10133 s->size += 4;
10134 if (*local_tls_type == GOT_NORMAL)
10135 s->size += 4;
10136
10137 if (info->shared || *local_tls_type == GOT_TLS_GD)
10138 srel->size += RELOC_SIZE (htab);
10139 }
10140 else
10141 *local_got = (bfd_vma) -1;
10142 }
10143 }
10144
10145 if (htab->tls_ldm_got.refcount > 0)
10146 {
10147 /* Allocate two GOT entries and one dynamic relocation (if necessary)
10148 for R_ARM_TLS_LDM32 relocations. */
10149 htab->tls_ldm_got.offset = htab->sgot->size;
10150 htab->sgot->size += 8;
10151 if (info->shared)
10152 htab->srelgot->size += RELOC_SIZE (htab);
10153 }
10154 else
10155 htab->tls_ldm_got.offset = -1;
10156
10157 /* Allocate global sym .plt and .got entries, and space for global
10158 sym dynamic relocs. */
10159 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
10160
10161 /* Here we rummage through the found bfds to collect glue information. */
10162 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10163 {
10164 if (! is_arm_elf (ibfd))
10165 continue;
10166
10167 /* Initialise mapping tables for code/data. */
10168 bfd_elf32_arm_init_maps (ibfd);
10169
10170 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
10171 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
10172 /* xgettext:c-format */
10173 _bfd_error_handler (_("Errors encountered processing file %s"),
10174 ibfd->filename);
10175 }
10176
10177 /* The check_relocs and adjust_dynamic_symbol entry points have
10178 determined the sizes of the various dynamic sections. Allocate
10179 memory for them. */
10180 plt = FALSE;
10181 relocs = FALSE;
10182 for (s = dynobj->sections; s != NULL; s = s->next)
10183 {
10184 const char * name;
10185
10186 if ((s->flags & SEC_LINKER_CREATED) == 0)
10187 continue;
10188
10189 /* It's OK to base decisions on the section name, because none
10190 of the dynobj section names depend upon the input files. */
10191 name = bfd_get_section_name (dynobj, s);
10192
10193 if (strcmp (name, ".plt") == 0)
10194 {
10195 /* Remember whether there is a PLT. */
10196 plt = s->size != 0;
10197 }
10198 else if (CONST_STRNEQ (name, ".rel"))
10199 {
10200 if (s->size != 0)
10201 {
10202 /* Remember whether there are any reloc sections other
10203 than .rel(a).plt and .rela.plt.unloaded. */
10204 if (s != htab->srelplt && s != htab->srelplt2)
10205 relocs = TRUE;
10206
10207 /* We use the reloc_count field as a counter if we need
10208 to copy relocs into the output file. */
10209 s->reloc_count = 0;
10210 }
10211 }
10212 else if (! CONST_STRNEQ (name, ".got")
10213 && strcmp (name, ".dynbss") != 0)
10214 {
10215 /* It's not one of our sections, so don't allocate space. */
10216 continue;
10217 }
10218
10219 if (s->size == 0)
10220 {
10221 /* If we don't need this section, strip it from the
10222 output file. This is mostly to handle .rel(a).bss and
10223 .rel(a).plt. We must create both sections in
10224 create_dynamic_sections, because they must be created
10225 before the linker maps input sections to output
10226 sections. The linker does that before
10227 adjust_dynamic_symbol is called, and it is that
10228 function which decides whether anything needs to go
10229 into these sections. */
10230 s->flags |= SEC_EXCLUDE;
10231 continue;
10232 }
10233
10234 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10235 continue;
10236
10237 /* Allocate memory for the section contents. */
10238 s->contents = bfd_zalloc (dynobj, s->size);
10239 if (s->contents == NULL)
10240 return FALSE;
10241 }
10242
10243 if (elf_hash_table (info)->dynamic_sections_created)
10244 {
10245 /* Add some entries to the .dynamic section. We fill in the
10246 values later, in elf32_arm_finish_dynamic_sections, but we
10247 must add the entries now so that we get the correct size for
10248 the .dynamic section. The DT_DEBUG entry is filled in by the
10249 dynamic linker and used by the debugger. */
10250 #define add_dynamic_entry(TAG, VAL) \
10251 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10252
10253 if (info->executable)
10254 {
10255 if (!add_dynamic_entry (DT_DEBUG, 0))
10256 return FALSE;
10257 }
10258
10259 if (plt)
10260 {
10261 if ( !add_dynamic_entry (DT_PLTGOT, 0)
10262 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10263 || !add_dynamic_entry (DT_PLTREL,
10264 htab->use_rel ? DT_REL : DT_RELA)
10265 || !add_dynamic_entry (DT_JMPREL, 0))
10266 return FALSE;
10267 }
10268
10269 if (relocs)
10270 {
10271 if (htab->use_rel)
10272 {
10273 if (!add_dynamic_entry (DT_REL, 0)
10274 || !add_dynamic_entry (DT_RELSZ, 0)
10275 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
10276 return FALSE;
10277 }
10278 else
10279 {
10280 if (!add_dynamic_entry (DT_RELA, 0)
10281 || !add_dynamic_entry (DT_RELASZ, 0)
10282 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
10283 return FALSE;
10284 }
10285 }
10286
10287 /* If any dynamic relocs apply to a read-only section,
10288 then we need a DT_TEXTREL entry. */
10289 if ((info->flags & DF_TEXTREL) == 0)
10290 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
10291 info);
10292
10293 if ((info->flags & DF_TEXTREL) != 0)
10294 {
10295 if (!add_dynamic_entry (DT_TEXTREL, 0))
10296 return FALSE;
10297 }
10298 if (htab->vxworks_p
10299 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
10300 return FALSE;
10301 }
10302 #undef add_dynamic_entry
10303
10304 return TRUE;
10305 }
10306
10307 /* Finish up dynamic symbol handling. We set the contents of various
10308 dynamic sections here. */
10309
10310 static bfd_boolean
10311 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
10312 struct bfd_link_info * info,
10313 struct elf_link_hash_entry * h,
10314 Elf_Internal_Sym * sym)
10315 {
10316 bfd * dynobj;
10317 struct elf32_arm_link_hash_table *htab;
10318 struct elf32_arm_link_hash_entry *eh;
10319
10320 dynobj = elf_hash_table (info)->dynobj;
10321 htab = elf32_arm_hash_table (info);
10322 eh = (struct elf32_arm_link_hash_entry *) h;
10323
10324 if (h->plt.offset != (bfd_vma) -1)
10325 {
10326 asection * splt;
10327 asection * srel;
10328 bfd_byte *loc;
10329 bfd_vma plt_index;
10330 Elf_Internal_Rela rel;
10331
10332 /* This symbol has an entry in the procedure linkage table. Set
10333 it up. */
10334
10335 BFD_ASSERT (h->dynindx != -1);
10336
10337 splt = bfd_get_section_by_name (dynobj, ".plt");
10338 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
10339 BFD_ASSERT (splt != NULL && srel != NULL);
10340
10341 /* Fill in the entry in the procedure linkage table. */
10342 if (htab->symbian_p)
10343 {
10344 put_arm_insn (htab, output_bfd,
10345 elf32_arm_symbian_plt_entry[0],
10346 splt->contents + h->plt.offset);
10347 bfd_put_32 (output_bfd,
10348 elf32_arm_symbian_plt_entry[1],
10349 splt->contents + h->plt.offset + 4);
10350
10351 /* Fill in the entry in the .rel.plt section. */
10352 rel.r_offset = (splt->output_section->vma
10353 + splt->output_offset
10354 + h->plt.offset + 4);
10355 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10356
10357 /* Get the index in the procedure linkage table which
10358 corresponds to this symbol. This is the index of this symbol
10359 in all the symbols for which we are making plt entries. The
10360 first entry in the procedure linkage table is reserved. */
10361 plt_index = ((h->plt.offset - htab->plt_header_size)
10362 / htab->plt_entry_size);
10363 }
10364 else
10365 {
10366 bfd_vma got_offset, got_address, plt_address;
10367 bfd_vma got_displacement;
10368 asection * sgot;
10369 bfd_byte * ptr;
10370
10371 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
10372 BFD_ASSERT (sgot != NULL);
10373
10374 /* Get the offset into the .got.plt table of the entry that
10375 corresponds to this function. */
10376 got_offset = eh->plt_got_offset;
10377
10378 /* Get the index in the procedure linkage table which
10379 corresponds to this symbol. This is the index of this symbol
10380 in all the symbols for which we are making plt entries. The
10381 first three entries in .got.plt are reserved; after that
10382 symbols appear in the same order as in .plt. */
10383 plt_index = (got_offset - 12) / 4;
10384
10385 /* Calculate the address of the GOT entry. */
10386 got_address = (sgot->output_section->vma
10387 + sgot->output_offset
10388 + got_offset);
10389
10390 /* ...and the address of the PLT entry. */
10391 plt_address = (splt->output_section->vma
10392 + splt->output_offset
10393 + h->plt.offset);
10394
10395 ptr = htab->splt->contents + h->plt.offset;
10396 if (htab->vxworks_p && info->shared)
10397 {
10398 unsigned int i;
10399 bfd_vma val;
10400
10401 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
10402 {
10403 val = elf32_arm_vxworks_shared_plt_entry[i];
10404 if (i == 2)
10405 val |= got_address - sgot->output_section->vma;
10406 if (i == 5)
10407 val |= plt_index * RELOC_SIZE (htab);
10408 if (i == 2 || i == 5)
10409 bfd_put_32 (output_bfd, val, ptr);
10410 else
10411 put_arm_insn (htab, output_bfd, val, ptr);
10412 }
10413 }
10414 else if (htab->vxworks_p)
10415 {
10416 unsigned int i;
10417 bfd_vma val;
10418
10419 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
10420 {
10421 val = elf32_arm_vxworks_exec_plt_entry[i];
10422 if (i == 2)
10423 val |= got_address;
10424 if (i == 4)
10425 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
10426 if (i == 5)
10427 val |= plt_index * RELOC_SIZE (htab);
10428 if (i == 2 || i == 5)
10429 bfd_put_32 (output_bfd, val, ptr);
10430 else
10431 put_arm_insn (htab, output_bfd, val, ptr);
10432 }
10433
10434 loc = (htab->srelplt2->contents
10435 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
10436
10437 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
10438 referencing the GOT for this PLT entry. */
10439 rel.r_offset = plt_address + 8;
10440 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10441 rel.r_addend = got_offset;
10442 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10443 loc += RELOC_SIZE (htab);
10444
10445 /* Create the R_ARM_ABS32 relocation referencing the
10446 beginning of the PLT for this GOT entry. */
10447 rel.r_offset = got_address;
10448 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
10449 rel.r_addend = 0;
10450 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10451 }
10452 else
10453 {
10454 bfd_signed_vma thumb_refs;
10455 /* Calculate the displacement between the PLT slot and the
10456 entry in the GOT. The eight-byte offset accounts for the
10457 value produced by adding to pc in the first instruction
10458 of the PLT stub. */
10459 got_displacement = got_address - (plt_address + 8);
10460
10461 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
10462
10463 thumb_refs = eh->plt_thumb_refcount;
10464 if (!htab->use_blx)
10465 thumb_refs += eh->plt_maybe_thumb_refcount;
10466
10467 if (thumb_refs > 0)
10468 {
10469 put_thumb_insn (htab, output_bfd,
10470 elf32_arm_plt_thumb_stub[0], ptr - 4);
10471 put_thumb_insn (htab, output_bfd,
10472 elf32_arm_plt_thumb_stub[1], ptr - 2);
10473 }
10474
10475 put_arm_insn (htab, output_bfd,
10476 elf32_arm_plt_entry[0]
10477 | ((got_displacement & 0x0ff00000) >> 20),
10478 ptr + 0);
10479 put_arm_insn (htab, output_bfd,
10480 elf32_arm_plt_entry[1]
10481 | ((got_displacement & 0x000ff000) >> 12),
10482 ptr+ 4);
10483 put_arm_insn (htab, output_bfd,
10484 elf32_arm_plt_entry[2]
10485 | (got_displacement & 0x00000fff),
10486 ptr + 8);
10487 #ifdef FOUR_WORD_PLT
10488 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
10489 #endif
10490 }
10491
10492 /* Fill in the entry in the global offset table. */
10493 bfd_put_32 (output_bfd,
10494 (splt->output_section->vma
10495 + splt->output_offset),
10496 sgot->contents + got_offset);
10497
10498 /* Fill in the entry in the .rel(a).plt section. */
10499 rel.r_addend = 0;
10500 rel.r_offset = got_address;
10501 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
10502 }
10503
10504 loc = srel->contents + plt_index * RELOC_SIZE (htab);
10505 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10506
10507 if (!h->def_regular)
10508 {
10509 /* Mark the symbol as undefined, rather than as defined in
10510 the .plt section. Leave the value alone. */
10511 sym->st_shndx = SHN_UNDEF;
10512 /* If the symbol is weak, we do need to clear the value.
10513 Otherwise, the PLT entry would provide a definition for
10514 the symbol even if the symbol wasn't defined anywhere,
10515 and so the symbol would never be NULL. */
10516 if (!h->ref_regular_nonweak)
10517 sym->st_value = 0;
10518 }
10519 }
10520
10521 if (h->got.offset != (bfd_vma) -1
10522 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
10523 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
10524 {
10525 asection * sgot;
10526 asection * srel;
10527 Elf_Internal_Rela rel;
10528 bfd_byte *loc;
10529 bfd_vma offset;
10530
10531 /* This symbol has an entry in the global offset table. Set it
10532 up. */
10533 sgot = bfd_get_section_by_name (dynobj, ".got");
10534 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
10535 BFD_ASSERT (sgot != NULL && srel != NULL);
10536
10537 offset = (h->got.offset & ~(bfd_vma) 1);
10538 rel.r_addend = 0;
10539 rel.r_offset = (sgot->output_section->vma
10540 + sgot->output_offset
10541 + offset);
10542
10543 /* If this is a static link, or it is a -Bsymbolic link and the
10544 symbol is defined locally or was forced to be local because
10545 of a version file, we just want to emit a RELATIVE reloc.
10546 The entry in the global offset table will already have been
10547 initialized in the relocate_section function. */
10548 if (info->shared
10549 && SYMBOL_REFERENCES_LOCAL (info, h))
10550 {
10551 BFD_ASSERT ((h->got.offset & 1) != 0);
10552 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
10553 if (!htab->use_rel)
10554 {
10555 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
10556 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
10557 }
10558 }
10559 else
10560 {
10561 BFD_ASSERT ((h->got.offset & 1) == 0);
10562 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
10563 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10564 }
10565
10566 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
10567 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10568 }
10569
10570 if (h->needs_copy)
10571 {
10572 asection * s;
10573 Elf_Internal_Rela rel;
10574 bfd_byte *loc;
10575
10576 /* This symbol needs a copy reloc. Set it up. */
10577 BFD_ASSERT (h->dynindx != -1
10578 && (h->root.type == bfd_link_hash_defined
10579 || h->root.type == bfd_link_hash_defweak));
10580
10581 s = bfd_get_section_by_name (h->root.u.def.section->owner,
10582 RELOC_SECTION (htab, ".bss"));
10583 BFD_ASSERT (s != NULL);
10584
10585 rel.r_addend = 0;
10586 rel.r_offset = (h->root.u.def.value
10587 + h->root.u.def.section->output_section->vma
10588 + h->root.u.def.section->output_offset);
10589 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
10590 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
10591 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10592 }
10593
10594 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
10595 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
10596 to the ".got" section. */
10597 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
10598 || (!htab->vxworks_p && h == htab->root.hgot))
10599 sym->st_shndx = SHN_ABS;
10600
10601 return TRUE;
10602 }
10603
10604 /* Finish up the dynamic sections. */
10605
10606 static bfd_boolean
10607 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
10608 {
10609 bfd * dynobj;
10610 asection * sgot;
10611 asection * sdyn;
10612
10613 dynobj = elf_hash_table (info)->dynobj;
10614
10615 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
10616 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
10617 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10618
10619 if (elf_hash_table (info)->dynamic_sections_created)
10620 {
10621 asection *splt;
10622 Elf32_External_Dyn *dyncon, *dynconend;
10623 struct elf32_arm_link_hash_table *htab;
10624
10625 htab = elf32_arm_hash_table (info);
10626 splt = bfd_get_section_by_name (dynobj, ".plt");
10627 BFD_ASSERT (splt != NULL && sdyn != NULL);
10628
10629 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10630 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10631
10632 for (; dyncon < dynconend; dyncon++)
10633 {
10634 Elf_Internal_Dyn dyn;
10635 const char * name;
10636 asection * s;
10637
10638 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10639
10640 switch (dyn.d_tag)
10641 {
10642 unsigned int type;
10643
10644 default:
10645 if (htab->vxworks_p
10646 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10647 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10648 break;
10649
10650 case DT_HASH:
10651 name = ".hash";
10652 goto get_vma_if_bpabi;
10653 case DT_STRTAB:
10654 name = ".dynstr";
10655 goto get_vma_if_bpabi;
10656 case DT_SYMTAB:
10657 name = ".dynsym";
10658 goto get_vma_if_bpabi;
10659 case DT_VERSYM:
10660 name = ".gnu.version";
10661 goto get_vma_if_bpabi;
10662 case DT_VERDEF:
10663 name = ".gnu.version_d";
10664 goto get_vma_if_bpabi;
10665 case DT_VERNEED:
10666 name = ".gnu.version_r";
10667 goto get_vma_if_bpabi;
10668
10669 case DT_PLTGOT:
10670 name = ".got";
10671 goto get_vma;
10672 case DT_JMPREL:
10673 name = RELOC_SECTION (htab, ".plt");
10674 get_vma:
10675 s = bfd_get_section_by_name (output_bfd, name);
10676 BFD_ASSERT (s != NULL);
10677 if (!htab->symbian_p)
10678 dyn.d_un.d_ptr = s->vma;
10679 else
10680 /* In the BPABI, tags in the PT_DYNAMIC section point
10681 at the file offset, not the memory address, for the
10682 convenience of the post linker. */
10683 dyn.d_un.d_ptr = s->filepos;
10684 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10685 break;
10686
10687 get_vma_if_bpabi:
10688 if (htab->symbian_p)
10689 goto get_vma;
10690 break;
10691
10692 case DT_PLTRELSZ:
10693 s = bfd_get_section_by_name (output_bfd,
10694 RELOC_SECTION (htab, ".plt"));
10695 BFD_ASSERT (s != NULL);
10696 dyn.d_un.d_val = s->size;
10697 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10698 break;
10699
10700 case DT_RELSZ:
10701 case DT_RELASZ:
10702 if (!htab->symbian_p)
10703 {
10704 /* My reading of the SVR4 ABI indicates that the
10705 procedure linkage table relocs (DT_JMPREL) should be
10706 included in the overall relocs (DT_REL). This is
10707 what Solaris does. However, UnixWare can not handle
10708 that case. Therefore, we override the DT_RELSZ entry
10709 here to make it not include the JMPREL relocs. Since
10710 the linker script arranges for .rel(a).plt to follow all
10711 other relocation sections, we don't have to worry
10712 about changing the DT_REL entry. */
10713 s = bfd_get_section_by_name (output_bfd,
10714 RELOC_SECTION (htab, ".plt"));
10715 if (s != NULL)
10716 dyn.d_un.d_val -= s->size;
10717 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10718 break;
10719 }
10720 /* Fall through. */
10721
10722 case DT_REL:
10723 case DT_RELA:
10724 /* In the BPABI, the DT_REL tag must point at the file
10725 offset, not the VMA, of the first relocation
10726 section. So, we use code similar to that in
10727 elflink.c, but do not check for SHF_ALLOC on the
10728 relcoation section, since relocations sections are
10729 never allocated under the BPABI. The comments above
10730 about Unixware notwithstanding, we include all of the
10731 relocations here. */
10732 if (htab->symbian_p)
10733 {
10734 unsigned int i;
10735 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
10736 ? SHT_REL : SHT_RELA);
10737 dyn.d_un.d_val = 0;
10738 for (i = 1; i < elf_numsections (output_bfd); i++)
10739 {
10740 Elf_Internal_Shdr *hdr
10741 = elf_elfsections (output_bfd)[i];
10742 if (hdr->sh_type == type)
10743 {
10744 if (dyn.d_tag == DT_RELSZ
10745 || dyn.d_tag == DT_RELASZ)
10746 dyn.d_un.d_val += hdr->sh_size;
10747 else if ((ufile_ptr) hdr->sh_offset
10748 <= dyn.d_un.d_val - 1)
10749 dyn.d_un.d_val = hdr->sh_offset;
10750 }
10751 }
10752 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10753 }
10754 break;
10755
10756 /* Set the bottom bit of DT_INIT/FINI if the
10757 corresponding function is Thumb. */
10758 case DT_INIT:
10759 name = info->init_function;
10760 goto get_sym;
10761 case DT_FINI:
10762 name = info->fini_function;
10763 get_sym:
10764 /* If it wasn't set by elf_bfd_final_link
10765 then there is nothing to adjust. */
10766 if (dyn.d_un.d_val != 0)
10767 {
10768 struct elf_link_hash_entry * eh;
10769
10770 eh = elf_link_hash_lookup (elf_hash_table (info), name,
10771 FALSE, FALSE, TRUE);
10772 if (eh != NULL
10773 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
10774 {
10775 dyn.d_un.d_val |= 1;
10776 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10777 }
10778 }
10779 break;
10780 }
10781 }
10782
10783 /* Fill in the first entry in the procedure linkage table. */
10784 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
10785 {
10786 const bfd_vma *plt0_entry;
10787 bfd_vma got_address, plt_address, got_displacement;
10788
10789 /* Calculate the addresses of the GOT and PLT. */
10790 got_address = sgot->output_section->vma + sgot->output_offset;
10791 plt_address = splt->output_section->vma + splt->output_offset;
10792
10793 if (htab->vxworks_p)
10794 {
10795 /* The VxWorks GOT is relocated by the dynamic linker.
10796 Therefore, we must emit relocations rather than simply
10797 computing the values now. */
10798 Elf_Internal_Rela rel;
10799
10800 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
10801 put_arm_insn (htab, output_bfd, plt0_entry[0],
10802 splt->contents + 0);
10803 put_arm_insn (htab, output_bfd, plt0_entry[1],
10804 splt->contents + 4);
10805 put_arm_insn (htab, output_bfd, plt0_entry[2],
10806 splt->contents + 8);
10807 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
10808
10809 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
10810 rel.r_offset = plt_address + 12;
10811 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10812 rel.r_addend = 0;
10813 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
10814 htab->srelplt2->contents);
10815 }
10816 else
10817 {
10818 got_displacement = got_address - (plt_address + 16);
10819
10820 plt0_entry = elf32_arm_plt0_entry;
10821 put_arm_insn (htab, output_bfd, plt0_entry[0],
10822 splt->contents + 0);
10823 put_arm_insn (htab, output_bfd, plt0_entry[1],
10824 splt->contents + 4);
10825 put_arm_insn (htab, output_bfd, plt0_entry[2],
10826 splt->contents + 8);
10827 put_arm_insn (htab, output_bfd, plt0_entry[3],
10828 splt->contents + 12);
10829
10830 #ifdef FOUR_WORD_PLT
10831 /* The displacement value goes in the otherwise-unused
10832 last word of the second entry. */
10833 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
10834 #else
10835 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
10836 #endif
10837 }
10838 }
10839
10840 /* UnixWare sets the entsize of .plt to 4, although that doesn't
10841 really seem like the right value. */
10842 if (splt->output_section->owner == output_bfd)
10843 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
10844
10845 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
10846 {
10847 /* Correct the .rel(a).plt.unloaded relocations. They will have
10848 incorrect symbol indexes. */
10849 int num_plts;
10850 unsigned char *p;
10851
10852 num_plts = ((htab->splt->size - htab->plt_header_size)
10853 / htab->plt_entry_size);
10854 p = htab->srelplt2->contents + RELOC_SIZE (htab);
10855
10856 for (; num_plts; num_plts--)
10857 {
10858 Elf_Internal_Rela rel;
10859
10860 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
10861 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10862 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
10863 p += RELOC_SIZE (htab);
10864
10865 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
10866 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
10867 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
10868 p += RELOC_SIZE (htab);
10869 }
10870 }
10871 }
10872
10873 /* Fill in the first three entries in the global offset table. */
10874 if (sgot)
10875 {
10876 if (sgot->size > 0)
10877 {
10878 if (sdyn == NULL)
10879 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
10880 else
10881 bfd_put_32 (output_bfd,
10882 sdyn->output_section->vma + sdyn->output_offset,
10883 sgot->contents);
10884 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
10885 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
10886 }
10887
10888 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
10889 }
10890
10891 return TRUE;
10892 }
10893
10894 static void
10895 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
10896 {
10897 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
10898 struct elf32_arm_link_hash_table *globals;
10899
10900 i_ehdrp = elf_elfheader (abfd);
10901
10902 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
10903 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
10904 else
10905 i_ehdrp->e_ident[EI_OSABI] = 0;
10906 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
10907
10908 if (link_info)
10909 {
10910 globals = elf32_arm_hash_table (link_info);
10911 if (globals->byteswap_code)
10912 i_ehdrp->e_flags |= EF_ARM_BE8;
10913 }
10914 }
10915
10916 static enum elf_reloc_type_class
10917 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
10918 {
10919 switch ((int) ELF32_R_TYPE (rela->r_info))
10920 {
10921 case R_ARM_RELATIVE:
10922 return reloc_class_relative;
10923 case R_ARM_JUMP_SLOT:
10924 return reloc_class_plt;
10925 case R_ARM_COPY:
10926 return reloc_class_copy;
10927 default:
10928 return reloc_class_normal;
10929 }
10930 }
10931
10932 /* Set the right machine number for an Arm ELF file. */
10933
10934 static bfd_boolean
10935 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
10936 {
10937 if (hdr->sh_type == SHT_NOTE)
10938 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
10939
10940 return TRUE;
10941 }
10942
10943 static void
10944 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
10945 {
10946 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
10947 }
10948
10949 /* Return TRUE if this is an unwinding table entry. */
10950
10951 static bfd_boolean
10952 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
10953 {
10954 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
10955 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
10956 }
10957
10958
10959 /* Set the type and flags for an ARM section. We do this by
10960 the section name, which is a hack, but ought to work. */
10961
10962 static bfd_boolean
10963 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
10964 {
10965 const char * name;
10966
10967 name = bfd_get_section_name (abfd, sec);
10968
10969 if (is_arm_elf_unwind_section_name (abfd, name))
10970 {
10971 hdr->sh_type = SHT_ARM_EXIDX;
10972 hdr->sh_flags |= SHF_LINK_ORDER;
10973 }
10974 return TRUE;
10975 }
10976
10977 /* Handle an ARM specific section when reading an object file. This is
10978 called when bfd_section_from_shdr finds a section with an unknown
10979 type. */
10980
10981 static bfd_boolean
10982 elf32_arm_section_from_shdr (bfd *abfd,
10983 Elf_Internal_Shdr * hdr,
10984 const char *name,
10985 int shindex)
10986 {
10987 /* There ought to be a place to keep ELF backend specific flags, but
10988 at the moment there isn't one. We just keep track of the
10989 sections by their name, instead. Fortunately, the ABI gives
10990 names for all the ARM specific sections, so we will probably get
10991 away with this. */
10992 switch (hdr->sh_type)
10993 {
10994 case SHT_ARM_EXIDX:
10995 case SHT_ARM_PREEMPTMAP:
10996 case SHT_ARM_ATTRIBUTES:
10997 break;
10998
10999 default:
11000 return FALSE;
11001 }
11002
11003 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
11004 return FALSE;
11005
11006 return TRUE;
11007 }
11008
11009 /* A structure used to record a list of sections, independently
11010 of the next and prev fields in the asection structure. */
11011 typedef struct section_list
11012 {
11013 asection * sec;
11014 struct section_list * next;
11015 struct section_list * prev;
11016 }
11017 section_list;
11018
11019 /* Unfortunately we need to keep a list of sections for which
11020 an _arm_elf_section_data structure has been allocated. This
11021 is because it is possible for functions like elf32_arm_write_section
11022 to be called on a section which has had an elf_data_structure
11023 allocated for it (and so the used_by_bfd field is valid) but
11024 for which the ARM extended version of this structure - the
11025 _arm_elf_section_data structure - has not been allocated. */
11026 static section_list * sections_with_arm_elf_section_data = NULL;
11027
11028 static void
11029 record_section_with_arm_elf_section_data (asection * sec)
11030 {
11031 struct section_list * entry;
11032
11033 entry = bfd_malloc (sizeof (* entry));
11034 if (entry == NULL)
11035 return;
11036 entry->sec = sec;
11037 entry->next = sections_with_arm_elf_section_data;
11038 entry->prev = NULL;
11039 if (entry->next != NULL)
11040 entry->next->prev = entry;
11041 sections_with_arm_elf_section_data = entry;
11042 }
11043
11044 static struct section_list *
11045 find_arm_elf_section_entry (asection * sec)
11046 {
11047 struct section_list * entry;
11048 static struct section_list * last_entry = NULL;
11049
11050 /* This is a short cut for the typical case where the sections are added
11051 to the sections_with_arm_elf_section_data list in forward order and
11052 then looked up here in backwards order. This makes a real difference
11053 to the ld-srec/sec64k.exp linker test. */
11054 entry = sections_with_arm_elf_section_data;
11055 if (last_entry != NULL)
11056 {
11057 if (last_entry->sec == sec)
11058 entry = last_entry;
11059 else if (last_entry->next != NULL
11060 && last_entry->next->sec == sec)
11061 entry = last_entry->next;
11062 }
11063
11064 for (; entry; entry = entry->next)
11065 if (entry->sec == sec)
11066 break;
11067
11068 if (entry)
11069 /* Record the entry prior to this one - it is the entry we are most
11070 likely to want to locate next time. Also this way if we have been
11071 called from unrecord_section_with_arm_elf_section_data() we will not
11072 be caching a pointer that is about to be freed. */
11073 last_entry = entry->prev;
11074
11075 return entry;
11076 }
11077
11078 static _arm_elf_section_data *
11079 get_arm_elf_section_data (asection * sec)
11080 {
11081 struct section_list * entry;
11082
11083 entry = find_arm_elf_section_entry (sec);
11084
11085 if (entry)
11086 return elf32_arm_section_data (entry->sec);
11087 else
11088 return NULL;
11089 }
11090
11091 static void
11092 unrecord_section_with_arm_elf_section_data (asection * sec)
11093 {
11094 struct section_list * entry;
11095
11096 entry = find_arm_elf_section_entry (sec);
11097
11098 if (entry)
11099 {
11100 if (entry->prev != NULL)
11101 entry->prev->next = entry->next;
11102 if (entry->next != NULL)
11103 entry->next->prev = entry->prev;
11104 if (entry == sections_with_arm_elf_section_data)
11105 sections_with_arm_elf_section_data = entry->next;
11106 free (entry);
11107 }
11108 }
11109
11110
11111 typedef struct
11112 {
11113 void *finfo;
11114 struct bfd_link_info *info;
11115 asection *sec;
11116 int sec_shndx;
11117 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
11118 asection *, struct elf_link_hash_entry *);
11119 } output_arch_syminfo;
11120
11121 enum map_symbol_type
11122 {
11123 ARM_MAP_ARM,
11124 ARM_MAP_THUMB,
11125 ARM_MAP_DATA
11126 };
11127
11128
11129 /* Output a single mapping symbol. */
11130
11131 static bfd_boolean
11132 elf32_arm_output_map_sym (output_arch_syminfo *osi,
11133 enum map_symbol_type type,
11134 bfd_vma offset)
11135 {
11136 static const char *names[3] = {"$a", "$t", "$d"};
11137 struct elf32_arm_link_hash_table *htab;
11138 Elf_Internal_Sym sym;
11139
11140 htab = elf32_arm_hash_table (osi->info);
11141 sym.st_value = osi->sec->output_section->vma
11142 + osi->sec->output_offset
11143 + offset;
11144 sym.st_size = 0;
11145 sym.st_other = 0;
11146 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
11147 sym.st_shndx = osi->sec_shndx;
11148 if (!osi->func (osi->finfo, names[type], &sym, osi->sec, NULL))
11149 return FALSE;
11150 return TRUE;
11151 }
11152
11153
11154 /* Output mapping symbols for PLT entries associated with H. */
11155
11156 static bfd_boolean
11157 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
11158 {
11159 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
11160 struct elf32_arm_link_hash_table *htab;
11161 struct elf32_arm_link_hash_entry *eh;
11162 bfd_vma addr;
11163
11164 htab = elf32_arm_hash_table (osi->info);
11165
11166 if (h->root.type == bfd_link_hash_indirect)
11167 return TRUE;
11168
11169 if (h->root.type == bfd_link_hash_warning)
11170 /* When warning symbols are created, they **replace** the "real"
11171 entry in the hash table, thus we never get to see the real
11172 symbol in a hash traversal. So look at it now. */
11173 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11174
11175 if (h->plt.offset == (bfd_vma) -1)
11176 return TRUE;
11177
11178 eh = (struct elf32_arm_link_hash_entry *) h;
11179 addr = h->plt.offset;
11180 if (htab->symbian_p)
11181 {
11182 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11183 return FALSE;
11184 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
11185 return FALSE;
11186 }
11187 else if (htab->vxworks_p)
11188 {
11189 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11190 return FALSE;
11191 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11192 return FALSE;
11193 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
11194 return FALSE;
11195 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
11196 return FALSE;
11197 }
11198 else
11199 {
11200 bfd_signed_vma thumb_refs;
11201
11202 thumb_refs = eh->plt_thumb_refcount;
11203 if (!htab->use_blx)
11204 thumb_refs += eh->plt_maybe_thumb_refcount;
11205
11206 if (thumb_refs > 0)
11207 {
11208 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
11209 return FALSE;
11210 }
11211 #ifdef FOUR_WORD_PLT
11212 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11213 return FALSE;
11214 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
11215 return FALSE;
11216 #else
11217 /* A three-word PLT with no Thumb thunk contains only Arm code,
11218 so only need to output a mapping symbol for the first PLT entry and
11219 entries with thumb thunks. */
11220 if (thumb_refs > 0 || addr == 20)
11221 {
11222 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11223 return FALSE;
11224 }
11225 #endif
11226 }
11227
11228 return TRUE;
11229 }
11230
11231 /* Output a single local symbol for a generated stub. */
11232
11233 static bfd_boolean
11234 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
11235 bfd_vma offset, bfd_vma size)
11236 {
11237 struct elf32_arm_link_hash_table *htab;
11238 Elf_Internal_Sym sym;
11239
11240 htab = elf32_arm_hash_table (osi->info);
11241 sym.st_value = osi->sec->output_section->vma
11242 + osi->sec->output_offset
11243 + offset;
11244 sym.st_size = size;
11245 sym.st_other = 0;
11246 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
11247 sym.st_shndx = osi->sec_shndx;
11248 if (!osi->func (osi->finfo, name, &sym, osi->sec, NULL))
11249 return FALSE;
11250 return TRUE;
11251 }
11252
11253 static bfd_boolean
11254 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
11255 void * in_arg)
11256 {
11257 struct elf32_arm_stub_hash_entry *stub_entry;
11258 struct bfd_link_info *info;
11259 struct elf32_arm_link_hash_table *htab;
11260 asection *stub_sec;
11261 bfd_vma addr;
11262 char *stub_name;
11263 output_arch_syminfo *osi;
11264
11265 /* Massage our args to the form they really have. */
11266 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
11267 osi = (output_arch_syminfo *) in_arg;
11268
11269 info = osi->info;
11270
11271 htab = elf32_arm_hash_table (info);
11272 stub_sec = stub_entry->stub_sec;
11273
11274 /* Ensure this stub is attached to the current section being
11275 processed. */
11276 if (stub_sec != osi->sec)
11277 return TRUE;
11278
11279 addr = (bfd_vma) stub_entry->stub_offset;
11280 stub_name = stub_entry->output_name;
11281
11282 switch (stub_entry->stub_type)
11283 {
11284 case arm_stub_long_branch:
11285 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 8))
11286 return FALSE;
11287 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11288 return FALSE;
11289 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
11290 return FALSE;
11291 break;
11292 case arm_thumb_v4t_stub_long_branch:
11293 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 12))
11294 return FALSE;
11295 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11296 return FALSE;
11297 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11298 return FALSE;
11299 break;
11300 case arm_thumb_thumb_stub_long_branch:
11301 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 16))
11302 return FALSE;
11303 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
11304 return FALSE;
11305 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
11306 return FALSE;
11307 break;
11308 case arm_thumb_arm_v4t_stub_long_branch:
11309 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 20))
11310 return FALSE;
11311 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
11312 return FALSE;
11313 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 8))
11314 return FALSE;
11315 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 16))
11316 return FALSE;
11317 break;
11318 case arm_thumb_arm_v4t_stub_short_branch:
11319 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 8))
11320 return FALSE;
11321 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 4))
11322 return FALSE;
11323 break;
11324 case arm_stub_pic_long_branch:
11325 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 12))
11326 return FALSE;
11327 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11328 return FALSE;
11329 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11330 return FALSE;
11331 break;
11332 default:
11333 BFD_FAIL ();
11334 }
11335
11336 return TRUE;
11337 }
11338
11339 /* Output mapping symbols for linker generated sections. */
11340
11341 static bfd_boolean
11342 elf32_arm_output_arch_local_syms (bfd *output_bfd,
11343 struct bfd_link_info *info,
11344 void *finfo,
11345 bfd_boolean (*func) (void *, const char *,
11346 Elf_Internal_Sym *,
11347 asection *,
11348 struct elf_link_hash_entry *))
11349 {
11350 output_arch_syminfo osi;
11351 struct elf32_arm_link_hash_table *htab;
11352 bfd_vma offset;
11353 bfd_size_type size;
11354
11355 htab = elf32_arm_hash_table (info);
11356 check_use_blx (htab);
11357
11358 osi.finfo = finfo;
11359 osi.info = info;
11360 osi.func = func;
11361
11362 /* ARM->Thumb glue. */
11363 if (htab->arm_glue_size > 0)
11364 {
11365 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11366 ARM2THUMB_GLUE_SECTION_NAME);
11367
11368 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11369 (output_bfd, osi.sec->output_section);
11370 if (info->shared || htab->root.is_relocatable_executable
11371 || htab->pic_veneer)
11372 size = ARM2THUMB_PIC_GLUE_SIZE;
11373 else if (htab->use_blx)
11374 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
11375 else
11376 size = ARM2THUMB_STATIC_GLUE_SIZE;
11377
11378 for (offset = 0; offset < htab->arm_glue_size; offset += size)
11379 {
11380 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
11381 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
11382 }
11383 }
11384
11385 /* Thumb->ARM glue. */
11386 if (htab->thumb_glue_size > 0)
11387 {
11388 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11389 THUMB2ARM_GLUE_SECTION_NAME);
11390
11391 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11392 (output_bfd, osi.sec->output_section);
11393 size = THUMB2ARM_GLUE_SIZE;
11394
11395 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
11396 {
11397 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
11398 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
11399 }
11400 }
11401
11402 /* ARMv4 BX veneers. */
11403 if (htab->bx_glue_size > 0)
11404 {
11405 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11406 ARM_BX_GLUE_SECTION_NAME);
11407
11408 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11409 (output_bfd, osi.sec->output_section);
11410
11411 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
11412 }
11413
11414 /* Long calls stubs. */
11415 if (htab->stub_bfd && htab->stub_bfd->sections)
11416 {
11417 asection* stub_sec;
11418
11419 for (stub_sec = htab->stub_bfd->sections;
11420 stub_sec != NULL;
11421 stub_sec = stub_sec->next)
11422 {
11423 /* Ignore non-stub sections. */
11424 if (!strstr (stub_sec->name, STUB_SUFFIX))
11425 continue;
11426
11427 osi.sec = stub_sec;
11428
11429 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11430 (output_bfd, osi.sec->output_section);
11431
11432 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
11433 }
11434 }
11435
11436 /* Finally, output mapping symbols for the PLT. */
11437 if (!htab->splt || htab->splt->size == 0)
11438 return TRUE;
11439
11440 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
11441 htab->splt->output_section);
11442 osi.sec = htab->splt;
11443 /* Output mapping symbols for the plt header. SymbianOS does not have a
11444 plt header. */
11445 if (htab->vxworks_p)
11446 {
11447 /* VxWorks shared libraries have no PLT header. */
11448 if (!info->shared)
11449 {
11450 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
11451 return FALSE;
11452 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
11453 return FALSE;
11454 }
11455 }
11456 else if (!htab->symbian_p)
11457 {
11458 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
11459 return FALSE;
11460 #ifndef FOUR_WORD_PLT
11461 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
11462 return FALSE;
11463 #endif
11464 }
11465
11466 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
11467 return TRUE;
11468 }
11469
11470 /* Allocate target specific section data. */
11471
11472 static bfd_boolean
11473 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
11474 {
11475 if (!sec->used_by_bfd)
11476 {
11477 _arm_elf_section_data *sdata;
11478 bfd_size_type amt = sizeof (*sdata);
11479
11480 sdata = bfd_zalloc (abfd, amt);
11481 if (sdata == NULL)
11482 return FALSE;
11483 sec->used_by_bfd = sdata;
11484 }
11485
11486 record_section_with_arm_elf_section_data (sec);
11487
11488 return _bfd_elf_new_section_hook (abfd, sec);
11489 }
11490
11491
11492 /* Used to order a list of mapping symbols by address. */
11493
11494 static int
11495 elf32_arm_compare_mapping (const void * a, const void * b)
11496 {
11497 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
11498 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
11499
11500 if (amap->vma > bmap->vma)
11501 return 1;
11502 else if (amap->vma < bmap->vma)
11503 return -1;
11504 else if (amap->type > bmap->type)
11505 /* Ensure results do not depend on the host qsort for objects with
11506 multiple mapping symbols at the same address by sorting on type
11507 after vma. */
11508 return 1;
11509 else if (amap->type < bmap->type)
11510 return -1;
11511 else
11512 return 0;
11513 }
11514
11515
11516 /* Do code byteswapping. Return FALSE afterwards so that the section is
11517 written out as normal. */
11518
11519 static bfd_boolean
11520 elf32_arm_write_section (bfd *output_bfd,
11521 struct bfd_link_info *link_info,
11522 asection *sec,
11523 bfd_byte *contents)
11524 {
11525 int mapcount, errcount;
11526 _arm_elf_section_data *arm_data;
11527 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
11528 elf32_arm_section_map *map;
11529 elf32_vfp11_erratum_list *errnode;
11530 bfd_vma ptr;
11531 bfd_vma end;
11532 bfd_vma offset = sec->output_section->vma + sec->output_offset;
11533 bfd_byte tmp;
11534 int i;
11535
11536 /* If this section has not been allocated an _arm_elf_section_data
11537 structure then we cannot record anything. */
11538 arm_data = get_arm_elf_section_data (sec);
11539 if (arm_data == NULL)
11540 return FALSE;
11541
11542 mapcount = arm_data->mapcount;
11543 map = arm_data->map;
11544 errcount = arm_data->erratumcount;
11545
11546 if (errcount != 0)
11547 {
11548 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
11549
11550 for (errnode = arm_data->erratumlist; errnode != 0;
11551 errnode = errnode->next)
11552 {
11553 bfd_vma index = errnode->vma - offset;
11554
11555 switch (errnode->type)
11556 {
11557 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
11558 {
11559 bfd_vma branch_to_veneer;
11560 /* Original condition code of instruction, plus bit mask for
11561 ARM B instruction. */
11562 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
11563 | 0x0a000000;
11564
11565 /* The instruction is before the label. */
11566 index -= 4;
11567
11568 /* Above offset included in -4 below. */
11569 branch_to_veneer = errnode->u.b.veneer->vma
11570 - errnode->vma - 4;
11571
11572 if ((signed) branch_to_veneer < -(1 << 25)
11573 || (signed) branch_to_veneer >= (1 << 25))
11574 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
11575 "range"), output_bfd);
11576
11577 insn |= (branch_to_veneer >> 2) & 0xffffff;
11578 contents[endianflip ^ index] = insn & 0xff;
11579 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
11580 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
11581 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
11582 }
11583 break;
11584
11585 case VFP11_ERRATUM_ARM_VENEER:
11586 {
11587 bfd_vma branch_from_veneer;
11588 unsigned int insn;
11589
11590 /* Take size of veneer into account. */
11591 branch_from_veneer = errnode->u.v.branch->vma
11592 - errnode->vma - 12;
11593
11594 if ((signed) branch_from_veneer < -(1 << 25)
11595 || (signed) branch_from_veneer >= (1 << 25))
11596 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
11597 "range"), output_bfd);
11598
11599 /* Original instruction. */
11600 insn = errnode->u.v.branch->u.b.vfp_insn;
11601 contents[endianflip ^ index] = insn & 0xff;
11602 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
11603 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
11604 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
11605
11606 /* Branch back to insn after original insn. */
11607 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
11608 contents[endianflip ^ (index + 4)] = insn & 0xff;
11609 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
11610 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
11611 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
11612 }
11613 break;
11614
11615 default:
11616 abort ();
11617 }
11618 }
11619 }
11620
11621 if (mapcount == 0)
11622 return FALSE;
11623
11624 if (globals->byteswap_code)
11625 {
11626 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
11627
11628 ptr = map[0].vma;
11629 for (i = 0; i < mapcount; i++)
11630 {
11631 if (i == mapcount - 1)
11632 end = sec->size;
11633 else
11634 end = map[i + 1].vma;
11635
11636 switch (map[i].type)
11637 {
11638 case 'a':
11639 /* Byte swap code words. */
11640 while (ptr + 3 < end)
11641 {
11642 tmp = contents[ptr];
11643 contents[ptr] = contents[ptr + 3];
11644 contents[ptr + 3] = tmp;
11645 tmp = contents[ptr + 1];
11646 contents[ptr + 1] = contents[ptr + 2];
11647 contents[ptr + 2] = tmp;
11648 ptr += 4;
11649 }
11650 break;
11651
11652 case 't':
11653 /* Byte swap code halfwords. */
11654 while (ptr + 1 < end)
11655 {
11656 tmp = contents[ptr];
11657 contents[ptr] = contents[ptr + 1];
11658 contents[ptr + 1] = tmp;
11659 ptr += 2;
11660 }
11661 break;
11662
11663 case 'd':
11664 /* Leave data alone. */
11665 break;
11666 }
11667 ptr = end;
11668 }
11669 }
11670
11671 free (map);
11672 arm_data->mapcount = 0;
11673 arm_data->mapsize = 0;
11674 arm_data->map = NULL;
11675 unrecord_section_with_arm_elf_section_data (sec);
11676
11677 return FALSE;
11678 }
11679
11680 static void
11681 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
11682 asection * sec,
11683 void * ignore ATTRIBUTE_UNUSED)
11684 {
11685 unrecord_section_with_arm_elf_section_data (sec);
11686 }
11687
11688 static bfd_boolean
11689 elf32_arm_close_and_cleanup (bfd * abfd)
11690 {
11691 if (abfd->sections)
11692 bfd_map_over_sections (abfd,
11693 unrecord_section_via_map_over_sections,
11694 NULL);
11695
11696 return _bfd_elf_close_and_cleanup (abfd);
11697 }
11698
11699 static bfd_boolean
11700 elf32_arm_bfd_free_cached_info (bfd * abfd)
11701 {
11702 if (abfd->sections)
11703 bfd_map_over_sections (abfd,
11704 unrecord_section_via_map_over_sections,
11705 NULL);
11706
11707 return _bfd_free_cached_info (abfd);
11708 }
11709
11710 /* Display STT_ARM_TFUNC symbols as functions. */
11711
11712 static void
11713 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
11714 asymbol *asym)
11715 {
11716 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
11717
11718 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
11719 elfsym->symbol.flags |= BSF_FUNCTION;
11720 }
11721
11722
11723 /* Mangle thumb function symbols as we read them in. */
11724
11725 static bfd_boolean
11726 elf32_arm_swap_symbol_in (bfd * abfd,
11727 const void *psrc,
11728 const void *pshn,
11729 Elf_Internal_Sym *dst)
11730 {
11731 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
11732 return FALSE;
11733
11734 /* New EABI objects mark thumb function symbols by setting the low bit of
11735 the address. Turn these into STT_ARM_TFUNC. */
11736 if ((ELF_ST_TYPE (dst->st_info) == STT_FUNC)
11737 && (dst->st_value & 1))
11738 {
11739 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
11740 dst->st_value &= ~(bfd_vma) 1;
11741 }
11742 return TRUE;
11743 }
11744
11745
11746 /* Mangle thumb function symbols as we write them out. */
11747
11748 static void
11749 elf32_arm_swap_symbol_out (bfd *abfd,
11750 const Elf_Internal_Sym *src,
11751 void *cdst,
11752 void *shndx)
11753 {
11754 Elf_Internal_Sym newsym;
11755
11756 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
11757 of the address set, as per the new EABI. We do this unconditionally
11758 because objcopy does not set the elf header flags until after
11759 it writes out the symbol table. */
11760 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
11761 {
11762 newsym = *src;
11763 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
11764 if (newsym.st_shndx != SHN_UNDEF)
11765 {
11766 /* Do this only for defined symbols. At link type, the static
11767 linker will simulate the work of dynamic linker of resolving
11768 symbols and will carry over the thumbness of found symbols to
11769 the output symbol table. It's not clear how it happens, but
11770 the thumbness of undefined symbols can well be different at
11771 runtime, and writing '1' for them will be confusing for users
11772 and possibly for dynamic linker itself.
11773 */
11774 newsym.st_value |= 1;
11775 }
11776
11777 src = &newsym;
11778 }
11779 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
11780 }
11781
11782 /* Add the PT_ARM_EXIDX program header. */
11783
11784 static bfd_boolean
11785 elf32_arm_modify_segment_map (bfd *abfd,
11786 struct bfd_link_info *info ATTRIBUTE_UNUSED)
11787 {
11788 struct elf_segment_map *m;
11789 asection *sec;
11790
11791 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
11792 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
11793 {
11794 /* If there is already a PT_ARM_EXIDX header, then we do not
11795 want to add another one. This situation arises when running
11796 "strip"; the input binary already has the header. */
11797 m = elf_tdata (abfd)->segment_map;
11798 while (m && m->p_type != PT_ARM_EXIDX)
11799 m = m->next;
11800 if (!m)
11801 {
11802 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
11803 if (m == NULL)
11804 return FALSE;
11805 m->p_type = PT_ARM_EXIDX;
11806 m->count = 1;
11807 m->sections[0] = sec;
11808
11809 m->next = elf_tdata (abfd)->segment_map;
11810 elf_tdata (abfd)->segment_map = m;
11811 }
11812 }
11813
11814 return TRUE;
11815 }
11816
11817 /* We may add a PT_ARM_EXIDX program header. */
11818
11819 static int
11820 elf32_arm_additional_program_headers (bfd *abfd,
11821 struct bfd_link_info *info ATTRIBUTE_UNUSED)
11822 {
11823 asection *sec;
11824
11825 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
11826 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
11827 return 1;
11828 else
11829 return 0;
11830 }
11831
11832 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
11833
11834 static bfd_boolean
11835 elf32_arm_is_function_type (unsigned int type)
11836 {
11837 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
11838 }
11839
11840 /* We use this to override swap_symbol_in and swap_symbol_out. */
11841 const struct elf_size_info elf32_arm_size_info =
11842 {
11843 sizeof (Elf32_External_Ehdr),
11844 sizeof (Elf32_External_Phdr),
11845 sizeof (Elf32_External_Shdr),
11846 sizeof (Elf32_External_Rel),
11847 sizeof (Elf32_External_Rela),
11848 sizeof (Elf32_External_Sym),
11849 sizeof (Elf32_External_Dyn),
11850 sizeof (Elf_External_Note),
11851 4,
11852 1,
11853 32, 2,
11854 ELFCLASS32, EV_CURRENT,
11855 bfd_elf32_write_out_phdrs,
11856 bfd_elf32_write_shdrs_and_ehdr,
11857 bfd_elf32_checksum_contents,
11858 bfd_elf32_write_relocs,
11859 elf32_arm_swap_symbol_in,
11860 elf32_arm_swap_symbol_out,
11861 bfd_elf32_slurp_reloc_table,
11862 bfd_elf32_slurp_symbol_table,
11863 bfd_elf32_swap_dyn_in,
11864 bfd_elf32_swap_dyn_out,
11865 bfd_elf32_swap_reloc_in,
11866 bfd_elf32_swap_reloc_out,
11867 bfd_elf32_swap_reloca_in,
11868 bfd_elf32_swap_reloca_out
11869 };
11870
11871 #define ELF_ARCH bfd_arch_arm
11872 #define ELF_MACHINE_CODE EM_ARM
11873 #ifdef __QNXTARGET__
11874 #define ELF_MAXPAGESIZE 0x1000
11875 #else
11876 #define ELF_MAXPAGESIZE 0x8000
11877 #endif
11878 #define ELF_MINPAGESIZE 0x1000
11879 #define ELF_COMMONPAGESIZE 0x1000
11880
11881 #define bfd_elf32_mkobject elf32_arm_mkobject
11882
11883 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
11884 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
11885 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
11886 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
11887 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
11888 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
11889 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
11890 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
11891 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
11892 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
11893 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
11894 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
11895 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
11896 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
11897
11898 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
11899 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
11900 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
11901 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
11902 #define elf_backend_check_relocs elf32_arm_check_relocs
11903 #define elf_backend_relocate_section elf32_arm_relocate_section
11904 #define elf_backend_write_section elf32_arm_write_section
11905 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
11906 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
11907 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
11908 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
11909 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
11910 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
11911 #define elf_backend_post_process_headers elf32_arm_post_process_headers
11912 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
11913 #define elf_backend_object_p elf32_arm_object_p
11914 #define elf_backend_section_flags elf32_arm_section_flags
11915 #define elf_backend_fake_sections elf32_arm_fake_sections
11916 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
11917 #define elf_backend_final_write_processing elf32_arm_final_write_processing
11918 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
11919 #define elf_backend_symbol_processing elf32_arm_symbol_processing
11920 #define elf_backend_size_info elf32_arm_size_info
11921 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
11922 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
11923 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
11924 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
11925 #define elf_backend_is_function_type elf32_arm_is_function_type
11926
11927 #define elf_backend_can_refcount 1
11928 #define elf_backend_can_gc_sections 1
11929 #define elf_backend_plt_readonly 1
11930 #define elf_backend_want_got_plt 1
11931 #define elf_backend_want_plt_sym 0
11932 #define elf_backend_may_use_rel_p 1
11933 #define elf_backend_may_use_rela_p 0
11934 #define elf_backend_default_use_rela_p 0
11935
11936 #define elf_backend_got_header_size 12
11937
11938 #undef elf_backend_obj_attrs_vendor
11939 #define elf_backend_obj_attrs_vendor "aeabi"
11940 #undef elf_backend_obj_attrs_section
11941 #define elf_backend_obj_attrs_section ".ARM.attributes"
11942 #undef elf_backend_obj_attrs_arg_type
11943 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
11944 #undef elf_backend_obj_attrs_section_type
11945 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
11946
11947 #include "elf32-target.h"
11948
11949 /* VxWorks Targets. */
11950
11951 #undef TARGET_LITTLE_SYM
11952 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
11953 #undef TARGET_LITTLE_NAME
11954 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
11955 #undef TARGET_BIG_SYM
11956 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
11957 #undef TARGET_BIG_NAME
11958 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
11959
11960 /* Like elf32_arm_link_hash_table_create -- but overrides
11961 appropriately for VxWorks. */
11962
11963 static struct bfd_link_hash_table *
11964 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
11965 {
11966 struct bfd_link_hash_table *ret;
11967
11968 ret = elf32_arm_link_hash_table_create (abfd);
11969 if (ret)
11970 {
11971 struct elf32_arm_link_hash_table *htab
11972 = (struct elf32_arm_link_hash_table *) ret;
11973 htab->use_rel = 0;
11974 htab->vxworks_p = 1;
11975 }
11976 return ret;
11977 }
11978
11979 static void
11980 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11981 {
11982 elf32_arm_final_write_processing (abfd, linker);
11983 elf_vxworks_final_write_processing (abfd, linker);
11984 }
11985
11986 #undef elf32_bed
11987 #define elf32_bed elf32_arm_vxworks_bed
11988
11989 #undef bfd_elf32_bfd_link_hash_table_create
11990 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
11991 #undef elf_backend_add_symbol_hook
11992 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
11993 #undef elf_backend_final_write_processing
11994 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
11995 #undef elf_backend_emit_relocs
11996 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
11997
11998 #undef elf_backend_may_use_rel_p
11999 #define elf_backend_may_use_rel_p 0
12000 #undef elf_backend_may_use_rela_p
12001 #define elf_backend_may_use_rela_p 1
12002 #undef elf_backend_default_use_rela_p
12003 #define elf_backend_default_use_rela_p 1
12004 #undef elf_backend_want_plt_sym
12005 #define elf_backend_want_plt_sym 1
12006 #undef ELF_MAXPAGESIZE
12007 #define ELF_MAXPAGESIZE 0x1000
12008
12009 #include "elf32-target.h"
12010
12011
12012 /* Symbian OS Targets. */
12013
12014 #undef TARGET_LITTLE_SYM
12015 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
12016 #undef TARGET_LITTLE_NAME
12017 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
12018 #undef TARGET_BIG_SYM
12019 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
12020 #undef TARGET_BIG_NAME
12021 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
12022
12023 /* Like elf32_arm_link_hash_table_create -- but overrides
12024 appropriately for Symbian OS. */
12025
12026 static struct bfd_link_hash_table *
12027 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
12028 {
12029 struct bfd_link_hash_table *ret;
12030
12031 ret = elf32_arm_link_hash_table_create (abfd);
12032 if (ret)
12033 {
12034 struct elf32_arm_link_hash_table *htab
12035 = (struct elf32_arm_link_hash_table *)ret;
12036 /* There is no PLT header for Symbian OS. */
12037 htab->plt_header_size = 0;
12038 /* The PLT entries are each one instruction and one word. */
12039 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
12040 htab->symbian_p = 1;
12041 /* Symbian uses armv5t or above, so use_blx is always true. */
12042 htab->use_blx = 1;
12043 htab->root.is_relocatable_executable = 1;
12044 }
12045 return ret;
12046 }
12047
12048 static const struct bfd_elf_special_section
12049 elf32_arm_symbian_special_sections[] =
12050 {
12051 /* In a BPABI executable, the dynamic linking sections do not go in
12052 the loadable read-only segment. The post-linker may wish to
12053 refer to these sections, but they are not part of the final
12054 program image. */
12055 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
12056 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
12057 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
12058 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
12059 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
12060 /* These sections do not need to be writable as the SymbianOS
12061 postlinker will arrange things so that no dynamic relocation is
12062 required. */
12063 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
12064 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
12065 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
12066 { NULL, 0, 0, 0, 0 }
12067 };
12068
12069 static void
12070 elf32_arm_symbian_begin_write_processing (bfd *abfd,
12071 struct bfd_link_info *link_info)
12072 {
12073 /* BPABI objects are never loaded directly by an OS kernel; they are
12074 processed by a postlinker first, into an OS-specific format. If
12075 the D_PAGED bit is set on the file, BFD will align segments on
12076 page boundaries, so that an OS can directly map the file. With
12077 BPABI objects, that just results in wasted space. In addition,
12078 because we clear the D_PAGED bit, map_sections_to_segments will
12079 recognize that the program headers should not be mapped into any
12080 loadable segment. */
12081 abfd->flags &= ~D_PAGED;
12082 elf32_arm_begin_write_processing (abfd, link_info);
12083 }
12084
12085 static bfd_boolean
12086 elf32_arm_symbian_modify_segment_map (bfd *abfd,
12087 struct bfd_link_info *info)
12088 {
12089 struct elf_segment_map *m;
12090 asection *dynsec;
12091
12092 /* BPABI shared libraries and executables should have a PT_DYNAMIC
12093 segment. However, because the .dynamic section is not marked
12094 with SEC_LOAD, the generic ELF code will not create such a
12095 segment. */
12096 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
12097 if (dynsec)
12098 {
12099 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
12100 if (m->p_type == PT_DYNAMIC)
12101 break;
12102
12103 if (m == NULL)
12104 {
12105 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
12106 m->next = elf_tdata (abfd)->segment_map;
12107 elf_tdata (abfd)->segment_map = m;
12108 }
12109 }
12110
12111 /* Also call the generic arm routine. */
12112 return elf32_arm_modify_segment_map (abfd, info);
12113 }
12114
12115 /* Return address for Ith PLT stub in section PLT, for relocation REL
12116 or (bfd_vma) -1 if it should not be included. */
12117
12118 static bfd_vma
12119 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
12120 const arelent *rel ATTRIBUTE_UNUSED)
12121 {
12122 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
12123 }
12124
12125
12126 #undef elf32_bed
12127 #define elf32_bed elf32_arm_symbian_bed
12128
12129 /* The dynamic sections are not allocated on SymbianOS; the postlinker
12130 will process them and then discard them. */
12131 #undef ELF_DYNAMIC_SEC_FLAGS
12132 #define ELF_DYNAMIC_SEC_FLAGS \
12133 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
12134
12135 #undef elf_backend_add_symbol_hook
12136 #undef elf_backend_emit_relocs
12137
12138 #undef bfd_elf32_bfd_link_hash_table_create
12139 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
12140 #undef elf_backend_special_sections
12141 #define elf_backend_special_sections elf32_arm_symbian_special_sections
12142 #undef elf_backend_begin_write_processing
12143 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
12144 #undef elf_backend_final_write_processing
12145 #define elf_backend_final_write_processing elf32_arm_final_write_processing
12146
12147 #undef elf_backend_modify_segment_map
12148 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
12149
12150 /* There is no .got section for BPABI objects, and hence no header. */
12151 #undef elf_backend_got_header_size
12152 #define elf_backend_got_header_size 0
12153
12154 /* Similarly, there is no .got.plt section. */
12155 #undef elf_backend_want_got_plt
12156 #define elf_backend_want_got_plt 0
12157
12158 #undef elf_backend_plt_sym_val
12159 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
12160
12161 #undef elf_backend_may_use_rel_p
12162 #define elf_backend_may_use_rel_p 1
12163 #undef elf_backend_may_use_rela_p
12164 #define elf_backend_may_use_rela_p 0
12165 #undef elf_backend_default_use_rela_p
12166 #define elf_backend_default_use_rela_p 0
12167 #undef elf_backend_want_plt_sym
12168 #define elf_backend_want_plt_sym 0
12169 #undef ELF_MAXPAGESIZE
12170 #define ELF_MAXPAGESIZE 0x8000
12171
12172 #include "elf32-target.h"