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[binutils.git] / bfd / elf32-arm.c
blobda1ac24d34aba49cd088c1d4a62f5ea32faa917b
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 /* Return true if NAME is the name of the relocation section associated
2470 with S. */
2471
2472 static bfd_boolean
2473 reloc_section_p (struct elf32_arm_link_hash_table *htab,
2474 const char *name, asection *s)
2475 {
2476 if (htab->use_rel)
2477 return CONST_STRNEQ (name, ".rel") && strcmp (s->name, name + 4) == 0;
2478 else
2479 return CONST_STRNEQ (name, ".rela") && strcmp (s->name, name + 5) == 0;
2480 }
2481
2482 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
2483 shortcuts to them in our hash table. */
2484
2485 static bfd_boolean
2486 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2487 {
2488 struct elf32_arm_link_hash_table *htab;
2489
2490 htab = elf32_arm_hash_table (info);
2491 /* BPABI objects never have a GOT, or associated sections. */
2492 if (htab->symbian_p)
2493 return TRUE;
2494
2495 if (! _bfd_elf_create_got_section (dynobj, info))
2496 return FALSE;
2497
2498 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
2499 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2500 if (!htab->sgot || !htab->sgotplt)
2501 abort ();
2502
2503 htab->srelgot = bfd_make_section_with_flags (dynobj,
2504 RELOC_SECTION (htab, ".got"),
2505 (SEC_ALLOC | SEC_LOAD
2506 | SEC_HAS_CONTENTS
2507 | SEC_IN_MEMORY
2508 | SEC_LINKER_CREATED
2509 | SEC_READONLY));
2510 if (htab->srelgot == NULL
2511 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2512 return FALSE;
2513 return TRUE;
2514 }
2515
2516 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
2517 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
2518 hash table. */
2519
2520 static bfd_boolean
2521 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2522 {
2523 struct elf32_arm_link_hash_table *htab;
2524
2525 htab = elf32_arm_hash_table (info);
2526 if (!htab->sgot && !create_got_section (dynobj, info))
2527 return FALSE;
2528
2529 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2530 return FALSE;
2531
2532 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
2533 htab->srelplt = bfd_get_section_by_name (dynobj,
2534 RELOC_SECTION (htab, ".plt"));
2535 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
2536 if (!info->shared)
2537 htab->srelbss = bfd_get_section_by_name (dynobj,
2538 RELOC_SECTION (htab, ".bss"));
2539
2540 if (htab->vxworks_p)
2541 {
2542 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
2543 return FALSE;
2544
2545 if (info->shared)
2546 {
2547 htab->plt_header_size = 0;
2548 htab->plt_entry_size
2549 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
2550 }
2551 else
2552 {
2553 htab->plt_header_size
2554 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
2555 htab->plt_entry_size
2556 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
2557 }
2558 }
2559
2560 if (!htab->splt
2561 || !htab->srelplt
2562 || !htab->sdynbss
2563 || (!info->shared && !htab->srelbss))
2564 abort ();
2565
2566 return TRUE;
2567 }
2568
2569 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2570
2571 static void
2572 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
2573 struct elf_link_hash_entry *dir,
2574 struct elf_link_hash_entry *ind)
2575 {
2576 struct elf32_arm_link_hash_entry *edir, *eind;
2577
2578 edir = (struct elf32_arm_link_hash_entry *) dir;
2579 eind = (struct elf32_arm_link_hash_entry *) ind;
2580
2581 if (eind->relocs_copied != NULL)
2582 {
2583 if (edir->relocs_copied != NULL)
2584 {
2585 struct elf32_arm_relocs_copied **pp;
2586 struct elf32_arm_relocs_copied *p;
2587
2588 /* Add reloc counts against the indirect sym to the direct sym
2589 list. Merge any entries against the same section. */
2590 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
2591 {
2592 struct elf32_arm_relocs_copied *q;
2593
2594 for (q = edir->relocs_copied; q != NULL; q = q->next)
2595 if (q->section == p->section)
2596 {
2597 q->pc_count += p->pc_count;
2598 q->count += p->count;
2599 *pp = p->next;
2600 break;
2601 }
2602 if (q == NULL)
2603 pp = &p->next;
2604 }
2605 *pp = edir->relocs_copied;
2606 }
2607
2608 edir->relocs_copied = eind->relocs_copied;
2609 eind->relocs_copied = NULL;
2610 }
2611
2612 if (ind->root.type == bfd_link_hash_indirect)
2613 {
2614 /* Copy over PLT info. */
2615 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
2616 eind->plt_thumb_refcount = 0;
2617 edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount;
2618 eind->plt_maybe_thumb_refcount = 0;
2619
2620 if (dir->got.refcount <= 0)
2621 {
2622 edir->tls_type = eind->tls_type;
2623 eind->tls_type = GOT_UNKNOWN;
2624 }
2625 }
2626
2627 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2628 }
2629
2630 /* Create an ARM elf linker hash table. */
2631
2632 static struct bfd_link_hash_table *
2633 elf32_arm_link_hash_table_create (bfd *abfd)
2634 {
2635 struct elf32_arm_link_hash_table *ret;
2636 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
2637
2638 ret = bfd_malloc (amt);
2639 if (ret == NULL)
2640 return NULL;
2641
2642 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
2643 elf32_arm_link_hash_newfunc,
2644 sizeof (struct elf32_arm_link_hash_entry)))
2645 {
2646 free (ret);
2647 return NULL;
2648 }
2649
2650 ret->sgot = NULL;
2651 ret->sgotplt = NULL;
2652 ret->srelgot = NULL;
2653 ret->splt = NULL;
2654 ret->srelplt = NULL;
2655 ret->sdynbss = NULL;
2656 ret->srelbss = NULL;
2657 ret->srelplt2 = NULL;
2658 ret->thumb_glue_size = 0;
2659 ret->arm_glue_size = 0;
2660 ret->bx_glue_size = 0;
2661 memset (ret->bx_glue_offset, 0, sizeof (ret->bx_glue_offset));
2662 ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
2663 ret->vfp11_erratum_glue_size = 0;
2664 ret->num_vfp11_fixes = 0;
2665 ret->bfd_of_glue_owner = NULL;
2666 ret->byteswap_code = 0;
2667 ret->target1_is_rel = 0;
2668 ret->target2_reloc = R_ARM_NONE;
2669 #ifdef FOUR_WORD_PLT
2670 ret->plt_header_size = 16;
2671 ret->plt_entry_size = 16;
2672 #else
2673 ret->plt_header_size = 20;
2674 ret->plt_entry_size = 12;
2675 #endif
2676 ret->fix_v4bx = 0;
2677 ret->use_blx = 0;
2678 ret->vxworks_p = 0;
2679 ret->symbian_p = 0;
2680 ret->use_rel = 1;
2681 ret->sym_sec.abfd = NULL;
2682 ret->obfd = abfd;
2683 ret->tls_ldm_got.refcount = 0;
2684 ret->stub_bfd = NULL;
2685 ret->add_stub_section = NULL;
2686 ret->layout_sections_again = NULL;
2687 ret->stub_group = NULL;
2688 ret->bfd_count = 0;
2689 ret->top_index = 0;
2690 ret->input_list = NULL;
2691
2692 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2693 sizeof (struct elf32_arm_stub_hash_entry)))
2694 {
2695 free (ret);
2696 return NULL;
2697 }
2698
2699 return &ret->root.root;
2700 }
2701
2702 /* Free the derived linker hash table. */
2703
2704 static void
2705 elf32_arm_hash_table_free (struct bfd_link_hash_table *hash)
2706 {
2707 struct elf32_arm_link_hash_table *ret
2708 = (struct elf32_arm_link_hash_table *) hash;
2709
2710 bfd_hash_table_free (&ret->stub_hash_table);
2711 _bfd_generic_link_hash_table_free (hash);
2712 }
2713
2714 /* Determine if we're dealing with a Thumb only architecture. */
2715
2716 static bfd_boolean
2717 using_thumb_only (struct elf32_arm_link_hash_table *globals)
2718 {
2719 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2720 Tag_CPU_arch);
2721 int profile;
2722
2723 if (arch != TAG_CPU_ARCH_V7)
2724 return FALSE;
2725
2726 profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2727 Tag_CPU_arch_profile);
2728
2729 return profile == 'M';
2730 }
2731
2732 /* Determine if we're dealing with a Thumb-2 object. */
2733
2734 static bfd_boolean
2735 using_thumb2 (struct elf32_arm_link_hash_table *globals)
2736 {
2737 int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
2738 Tag_CPU_arch);
2739 return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7;
2740 }
2741
2742 static bfd_boolean
2743 arm_stub_is_thumb (enum elf32_arm_stub_type stub_type)
2744 {
2745 switch (stub_type)
2746 {
2747 case arm_thumb_thumb_stub_long_branch:
2748 case arm_thumb_arm_v4t_stub_long_branch:
2749 case arm_thumb_arm_v4t_stub_short_branch:
2750 return TRUE;
2751 case arm_stub_none:
2752 BFD_FAIL ();
2753 return FALSE;
2754 break;
2755 default:
2756 return FALSE;
2757 }
2758 }
2759
2760 /* Determine the type of stub needed, if any, for a call. */
2761
2762 static enum elf32_arm_stub_type
2763 arm_type_of_stub (struct bfd_link_info *info,
2764 asection *input_sec,
2765 const Elf_Internal_Rela *rel,
2766 unsigned char st_type,
2767 struct elf32_arm_link_hash_entry *hash,
2768 bfd_vma destination,
2769 asection *sym_sec,
2770 bfd *input_bfd,
2771 const char *name)
2772 {
2773 bfd_vma location;
2774 bfd_signed_vma branch_offset;
2775 unsigned int r_type;
2776 struct elf32_arm_link_hash_table * globals;
2777 int thumb2;
2778 int thumb_only;
2779 enum elf32_arm_stub_type stub_type = arm_stub_none;
2780
2781 /* We don't know the actual type of destination in case it is of
2782 type STT_SECTION: give up. */
2783 if (st_type == STT_SECTION)
2784 return stub_type;
2785
2786 globals = elf32_arm_hash_table (info);
2787
2788 thumb_only = using_thumb_only (globals);
2789
2790 thumb2 = using_thumb2 (globals);
2791
2792 /* Determine where the call point is. */
2793 location = (input_sec->output_offset
2794 + input_sec->output_section->vma
2795 + rel->r_offset);
2796
2797 branch_offset = (bfd_signed_vma)(destination - location);
2798
2799 r_type = ELF32_R_TYPE (rel->r_info);
2800
2801 /* If the call will go through a PLT entry then we do not need
2802 glue. */
2803 if (globals->splt != NULL && hash != NULL && hash->root.plt.offset != (bfd_vma) -1)
2804 return stub_type;
2805
2806 if (r_type == R_ARM_THM_CALL)
2807 {
2808 if ((!thumb2
2809 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
2810 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
2811 || (thumb2
2812 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
2813 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
2814 || ((st_type != STT_ARM_TFUNC) && !globals->use_blx))
2815 {
2816 if (st_type == STT_ARM_TFUNC)
2817 {
2818 /* Thumb to thumb. */
2819 if (!thumb_only)
2820 {
2821 stub_type = (info->shared | globals->pic_veneer)
2822 ? ((globals->use_blx)
2823 ? arm_stub_pic_long_branch
2824 : arm_stub_none)
2825 : (globals->use_blx)
2826 ? arm_stub_long_branch
2827 : arm_stub_none;
2828 }
2829 else
2830 {
2831 stub_type = (info->shared | globals->pic_veneer)
2832 ? arm_stub_none
2833 : (globals->use_blx)
2834 ? arm_thumb_thumb_stub_long_branch
2835 : arm_stub_none;
2836 }
2837 }
2838 else
2839 {
2840 /* Thumb to arm. */
2841 if (sym_sec != NULL
2842 && sym_sec->owner != NULL
2843 && !INTERWORK_FLAG (sym_sec->owner))
2844 {
2845 (*_bfd_error_handler)
2846 (_("%B(%s): warning: interworking not enabled.\n"
2847 " first occurrence: %B: Thumb call to ARM"),
2848 sym_sec->owner, input_bfd, name);
2849 }
2850
2851 stub_type = (info->shared | globals->pic_veneer)
2852 ? ((globals->use_blx)
2853 ? arm_stub_pic_long_branch
2854 : arm_stub_none)
2855 : (globals->use_blx)
2856 ? arm_stub_long_branch
2857 : arm_thumb_arm_v4t_stub_long_branch;
2858
2859 /* Handle v4t short branches. */
2860 if ((stub_type == arm_thumb_arm_v4t_stub_long_branch)
2861 && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET)
2862 && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET))
2863 stub_type = arm_thumb_arm_v4t_stub_short_branch;
2864 }
2865 }
2866 }
2867 else if (r_type == R_ARM_CALL)
2868 {
2869 if (st_type == STT_ARM_TFUNC)
2870 {
2871 /* Arm to thumb. */
2872
2873 if (sym_sec != NULL
2874 && sym_sec->owner != NULL
2875 && !INTERWORK_FLAG (sym_sec->owner))
2876 {
2877 (*_bfd_error_handler)
2878 (_("%B(%s): warning: interworking not enabled.\n"
2879 " first occurrence: %B: Thumb call to ARM"),
2880 sym_sec->owner, input_bfd, name);
2881 }
2882
2883 /* We have an extra 2-bytes reach because of
2884 the mode change (bit 24 (H) of BLX encoding). */
2885 if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
2886 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
2887 || !globals->use_blx)
2888 {
2889 stub_type = (info->shared | globals->pic_veneer)
2890 ? arm_stub_pic_long_branch
2891 : (globals->use_blx)
2892 ? arm_stub_long_branch
2893 : arm_thumb_v4t_stub_long_branch;
2894 }
2895 }
2896 else
2897 {
2898 /* Arm to arm. */
2899 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
2900 || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET))
2901 {
2902 stub_type = (info->shared | globals->pic_veneer)
2903 ? arm_stub_pic_long_branch
2904 : arm_stub_long_branch;
2905 }
2906 }
2907 }
2908
2909 return stub_type;
2910 }
2911
2912 /* Build a name for an entry in the stub hash table. */
2913
2914 static char *
2915 elf32_arm_stub_name (const asection *input_section,
2916 const asection *sym_sec,
2917 const struct elf32_arm_link_hash_entry *hash,
2918 const Elf_Internal_Rela *rel)
2919 {
2920 char *stub_name;
2921 bfd_size_type len;
2922
2923 if (hash)
2924 {
2925 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1;
2926 stub_name = bfd_malloc (len);
2927 if (stub_name != NULL)
2928 sprintf (stub_name, "%08x_%s+%x",
2929 input_section->id & 0xffffffff,
2930 hash->root.root.root.string,
2931 (int) rel->r_addend & 0xffffffff);
2932 }
2933 else
2934 {
2935 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
2936 stub_name = bfd_malloc (len);
2937 if (stub_name != NULL)
2938 sprintf (stub_name, "%08x_%x:%x+%x",
2939 input_section->id & 0xffffffff,
2940 sym_sec->id & 0xffffffff,
2941 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
2942 (int) rel->r_addend & 0xffffffff);
2943 }
2944
2945 return stub_name;
2946 }
2947
2948 /* Look up an entry in the stub hash. Stub entries are cached because
2949 creating the stub name takes a bit of time. */
2950
2951 static struct elf32_arm_stub_hash_entry *
2952 elf32_arm_get_stub_entry (const asection *input_section,
2953 const asection *sym_sec,
2954 struct elf_link_hash_entry *hash,
2955 const Elf_Internal_Rela *rel,
2956 struct elf32_arm_link_hash_table *htab)
2957 {
2958 struct elf32_arm_stub_hash_entry *stub_entry;
2959 struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash;
2960 const asection *id_sec;
2961
2962 if ((input_section->flags & SEC_CODE) == 0)
2963 return NULL;
2964
2965 /* If this input section is part of a group of sections sharing one
2966 stub section, then use the id of the first section in the group.
2967 Stub names need to include a section id, as there may well be
2968 more than one stub used to reach say, printf, and we need to
2969 distinguish between them. */
2970 id_sec = htab->stub_group[input_section->id].link_sec;
2971
2972 if (h != NULL && h->stub_cache != NULL
2973 && h->stub_cache->h == h
2974 && h->stub_cache->id_sec == id_sec)
2975 {
2976 stub_entry = h->stub_cache;
2977 }
2978 else
2979 {
2980 char *stub_name;
2981
2982 stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel);
2983 if (stub_name == NULL)
2984 return NULL;
2985
2986 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
2987 stub_name, FALSE, FALSE);
2988 if (h != NULL)
2989 h->stub_cache = stub_entry;
2990
2991 free (stub_name);
2992 }
2993
2994 return stub_entry;
2995 }
2996
2997 /* Add a new stub entry to the stub hash. Not all fields of the new
2998 stub entry are initialised. */
2999
3000 static struct elf32_arm_stub_hash_entry *
3001 elf32_arm_add_stub (const char *stub_name,
3002 asection *section,
3003 struct elf32_arm_link_hash_table *htab)
3004 {
3005 asection *link_sec;
3006 asection *stub_sec;
3007 struct elf32_arm_stub_hash_entry *stub_entry;
3008
3009 link_sec = htab->stub_group[section->id].link_sec;
3010 stub_sec = htab->stub_group[section->id].stub_sec;
3011 if (stub_sec == NULL)
3012 {
3013 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3014 if (stub_sec == NULL)
3015 {
3016 size_t namelen;
3017 bfd_size_type len;
3018 char *s_name;
3019
3020 namelen = strlen (link_sec->name);
3021 len = namelen + sizeof (STUB_SUFFIX);
3022 s_name = bfd_alloc (htab->stub_bfd, len);
3023 if (s_name == NULL)
3024 return NULL;
3025
3026 memcpy (s_name, link_sec->name, namelen);
3027 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3028 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3029 if (stub_sec == NULL)
3030 return NULL;
3031 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3032 }
3033 htab->stub_group[section->id].stub_sec = stub_sec;
3034 }
3035
3036 /* Enter this entry into the linker stub hash table. */
3037 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3038 TRUE, FALSE);
3039 if (stub_entry == NULL)
3040 {
3041 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3042 section->owner,
3043 stub_name);
3044 return NULL;
3045 }
3046
3047 stub_entry->stub_sec = stub_sec;
3048 stub_entry->stub_offset = 0;
3049 stub_entry->id_sec = link_sec;
3050
3051 return stub_entry;
3052 }
3053
3054 /* Store an Arm insn into an output section not processed by
3055 elf32_arm_write_section. */
3056
3057 static void
3058 put_arm_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_putl32 (val, ptr);
3063 else
3064 bfd_putb32 (val, ptr);
3065 }
3066
3067 /* Store a 16-bit Thumb insn into an output section not processed by
3068 elf32_arm_write_section. */
3069
3070 static void
3071 put_thumb_insn (struct elf32_arm_link_hash_table * htab,
3072 bfd * output_bfd, bfd_vma val, void * ptr)
3073 {
3074 if (htab->byteswap_code != bfd_little_endian (output_bfd))
3075 bfd_putl16 (val, ptr);
3076 else
3077 bfd_putb16 (val, ptr);
3078 }
3079
3080 static bfd_boolean
3081 arm_build_one_stub (struct bfd_hash_entry *gen_entry,
3082 void * in_arg)
3083 {
3084 struct elf32_arm_stub_hash_entry *stub_entry;
3085 struct bfd_link_info *info;
3086 struct elf32_arm_link_hash_table *htab;
3087 asection *stub_sec;
3088 bfd *stub_bfd;
3089 bfd_vma stub_addr;
3090 bfd_byte *loc;
3091 bfd_vma sym_value;
3092 int template_size;
3093 int size;
3094 const bfd_vma *template;
3095 int i;
3096 struct elf32_arm_link_hash_table * globals;
3097
3098 /* Massage our args to the form they really have. */
3099 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3100 info = (struct bfd_link_info *) in_arg;
3101
3102 globals = elf32_arm_hash_table (info);
3103
3104 htab = elf32_arm_hash_table (info);
3105 stub_sec = stub_entry->stub_sec;
3106
3107 /* Make a note of the offset within the stubs for this entry. */
3108 stub_entry->stub_offset = stub_sec->size;
3109 loc = stub_sec->contents + stub_entry->stub_offset;
3110
3111 stub_bfd = stub_sec->owner;
3112
3113 /* This is the address of the start of the stub. */
3114 stub_addr = stub_sec->output_section->vma + stub_sec->output_offset
3115 + stub_entry->stub_offset;
3116
3117 /* This is the address of the stub destination. */
3118 sym_value = (stub_entry->target_value
3119 + stub_entry->target_section->output_offset
3120 + stub_entry->target_section->output_section->vma);
3121
3122 switch (stub_entry->stub_type)
3123 {
3124 case arm_stub_long_branch:
3125 template = arm_long_branch_stub;
3126 template_size = (sizeof (arm_long_branch_stub) / sizeof (bfd_vma)) * 4;
3127 break;
3128 case arm_thumb_v4t_stub_long_branch:
3129 template = arm_thumb_v4t_long_branch_stub;
3130 template_size = (sizeof (arm_thumb_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3131 break;
3132 case arm_thumb_thumb_stub_long_branch:
3133 template = arm_thumb_thumb_long_branch_stub;
3134 template_size = (sizeof (arm_thumb_thumb_long_branch_stub) / sizeof (bfd_vma)) * 4;
3135 break;
3136 case arm_thumb_arm_v4t_stub_long_branch:
3137 template = arm_thumb_arm_v4t_long_branch_stub;
3138 template_size = (sizeof (arm_thumb_arm_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3139 break;
3140 case arm_thumb_arm_v4t_stub_short_branch:
3141 template = arm_thumb_arm_v4t_short_branch_stub;
3142 template_size = (sizeof(arm_thumb_arm_v4t_short_branch_stub) / sizeof (bfd_vma)) * 4;
3143 break;
3144 case arm_stub_pic_long_branch:
3145 template = arm_pic_long_branch_stub;
3146 template_size = (sizeof (arm_pic_long_branch_stub) / sizeof (bfd_vma)) * 4;
3147 break;
3148 default:
3149 BFD_FAIL ();
3150 return FALSE;
3151 }
3152
3153 size = 0;
3154 for (i = 0; i < (template_size / 4); i++)
3155 {
3156 /* A 0 pattern is a placeholder, every other pattern is an
3157 instruction. */
3158 if (template[i] != 0)
3159 put_arm_insn (globals, stub_bfd, template[i], loc + size);
3160 else
3161 bfd_put_32 (stub_bfd, template[i], loc + size);
3162
3163 size += 4;
3164 }
3165 stub_sec->size += size;
3166
3167 /* Destination is Thumb. Force bit 0 to 1 to reflect this. */
3168 if (stub_entry->st_type == STT_ARM_TFUNC)
3169 sym_value |= 1;
3170
3171 switch (stub_entry->stub_type)
3172 {
3173 case arm_stub_long_branch:
3174 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3175 stub_bfd, stub_sec, stub_sec->contents,
3176 stub_entry->stub_offset + 4, sym_value, 0);
3177 break;
3178 case arm_thumb_v4t_stub_long_branch:
3179 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3180 stub_bfd, stub_sec, stub_sec->contents,
3181 stub_entry->stub_offset + 8, sym_value, 0);
3182 break;
3183 case arm_thumb_thumb_stub_long_branch:
3184 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3185 stub_bfd, stub_sec, stub_sec->contents,
3186 stub_entry->stub_offset + 12, sym_value, 0);
3187 break;
3188 case arm_thumb_arm_v4t_stub_long_branch:
3189 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_ABS32),
3190 stub_bfd, stub_sec, stub_sec->contents,
3191 stub_entry->stub_offset + 16, sym_value, 0);
3192 break;
3193 case arm_thumb_arm_v4t_stub_short_branch:
3194 {
3195 long int rel_offset;
3196 static const insn32 t2a3_b_insn = 0xea000000;
3197
3198 rel_offset = sym_value - (stub_addr + 8 + 4);
3199
3200 put_arm_insn (globals, stub_bfd,
3201 (bfd_vma) t2a3_b_insn | ((rel_offset >> 2) & 0x00FFFFFF),
3202 loc + 4);
3203 }
3204 break;
3205
3206 case arm_stub_pic_long_branch:
3207 /* We want the value relative to the address 8 bytes from the
3208 start of the stub. */
3209 _bfd_final_link_relocate (elf32_arm_howto_from_type (R_ARM_REL32),
3210 stub_bfd, stub_sec, stub_sec->contents,
3211 stub_entry->stub_offset + 8, sym_value, 0);
3212 break;
3213 default:
3214 break;
3215 }
3216
3217 return TRUE;
3218 }
3219
3220 /* As above, but don't actually build the stub. Just bump offset so
3221 we know stub section sizes. */
3222
3223 static bfd_boolean
3224 arm_size_one_stub (struct bfd_hash_entry *gen_entry,
3225 void * in_arg)
3226 {
3227 struct elf32_arm_stub_hash_entry *stub_entry;
3228 struct elf32_arm_link_hash_table *htab;
3229 const bfd_vma *template;
3230 int template_size;
3231 int size;
3232 int i;
3233
3234 /* Massage our args to the form they really have. */
3235 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
3236 htab = (struct elf32_arm_link_hash_table *) in_arg;
3237
3238 switch (stub_entry->stub_type)
3239 {
3240 case arm_stub_long_branch:
3241 template = arm_long_branch_stub;
3242 template_size = (sizeof (arm_long_branch_stub) / sizeof (bfd_vma)) * 4;
3243 break;
3244 case arm_thumb_v4t_stub_long_branch:
3245 template = arm_thumb_v4t_long_branch_stub;
3246 template_size = (sizeof (arm_thumb_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3247 break;
3248 case arm_thumb_thumb_stub_long_branch:
3249 template = arm_thumb_thumb_long_branch_stub;
3250 template_size = (sizeof (arm_thumb_thumb_long_branch_stub) / sizeof (bfd_vma)) * 4;
3251 break;
3252 case arm_thumb_arm_v4t_stub_long_branch:
3253 template = arm_thumb_arm_v4t_long_branch_stub;
3254 template_size = (sizeof (arm_thumb_arm_v4t_long_branch_stub) / sizeof (bfd_vma)) * 4;
3255 break;
3256 case arm_thumb_arm_v4t_stub_short_branch:
3257 template = arm_thumb_arm_v4t_short_branch_stub;
3258 template_size = (sizeof(arm_thumb_arm_v4t_short_branch_stub) / sizeof (bfd_vma)) * 4;
3259 break;
3260 case arm_stub_pic_long_branch:
3261 template = arm_pic_long_branch_stub;
3262 template_size = (sizeof (arm_pic_long_branch_stub) / sizeof (bfd_vma)) * 4;
3263 break;
3264 default:
3265 BFD_FAIL ();
3266 return FALSE;
3267 break;
3268 }
3269
3270 size = 0;
3271 for (i = 0; i < (template_size / 4); i++)
3272 size += 4;
3273 size = (size + 7) & ~7;
3274 stub_entry->stub_sec->size += size;
3275 return TRUE;
3276 }
3277
3278 /* External entry points for sizing and building linker stubs. */
3279
3280 /* Set up various things so that we can make a list of input sections
3281 for each output section included in the link. Returns -1 on error,
3282 0 when no stubs will be needed, and 1 on success. */
3283
3284 int
3285 elf32_arm_setup_section_lists (bfd *output_bfd,
3286 struct bfd_link_info *info)
3287 {
3288 bfd *input_bfd;
3289 unsigned int bfd_count;
3290 int top_id, top_index;
3291 asection *section;
3292 asection **input_list, **list;
3293 bfd_size_type amt;
3294 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3295
3296 if (! is_elf_hash_table (htab))
3297 return 0;
3298
3299 /* Count the number of input BFDs and find the top input section id. */
3300 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3301 input_bfd != NULL;
3302 input_bfd = input_bfd->link_next)
3303 {
3304 bfd_count += 1;
3305 for (section = input_bfd->sections;
3306 section != NULL;
3307 section = section->next)
3308 {
3309 if (top_id < section->id)
3310 top_id = section->id;
3311 }
3312 }
3313 htab->bfd_count = bfd_count;
3314
3315 amt = sizeof (struct map_stub) * (top_id + 1);
3316 htab->stub_group = bfd_zmalloc (amt);
3317 if (htab->stub_group == NULL)
3318 return -1;
3319
3320 /* We can't use output_bfd->section_count here to find the top output
3321 section index as some sections may have been removed, and
3322 _bfd_strip_section_from_output doesn't renumber the indices. */
3323 for (section = output_bfd->sections, top_index = 0;
3324 section != NULL;
3325 section = section->next)
3326 {
3327 if (top_index < section->index)
3328 top_index = section->index;
3329 }
3330
3331 htab->top_index = top_index;
3332 amt = sizeof (asection *) * (top_index + 1);
3333 input_list = bfd_malloc (amt);
3334 htab->input_list = input_list;
3335 if (input_list == NULL)
3336 return -1;
3337
3338 /* For sections we aren't interested in, mark their entries with a
3339 value we can check later. */
3340 list = input_list + top_index;
3341 do
3342 *list = bfd_abs_section_ptr;
3343 while (list-- != input_list);
3344
3345 for (section = output_bfd->sections;
3346 section != NULL;
3347 section = section->next)
3348 {
3349 if ((section->flags & SEC_CODE) != 0)
3350 input_list[section->index] = NULL;
3351 }
3352
3353 return 1;
3354 }
3355
3356 /* The linker repeatedly calls this function for each input section,
3357 in the order that input sections are linked into output sections.
3358 Build lists of input sections to determine groupings between which
3359 we may insert linker stubs. */
3360
3361 void
3362 elf32_arm_next_input_section (struct bfd_link_info *info,
3363 asection *isec)
3364 {
3365 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3366
3367 if (isec->output_section->index <= htab->top_index)
3368 {
3369 asection **list = htab->input_list + isec->output_section->index;
3370
3371 if (*list != bfd_abs_section_ptr)
3372 {
3373 /* Steal the link_sec pointer for our list. */
3374 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3375 /* This happens to make the list in reverse order,
3376 which is what we want. */
3377 PREV_SEC (isec) = *list;
3378 *list = isec;
3379 }
3380 }
3381 }
3382
3383 /* See whether we can group stub sections together. Grouping stub
3384 sections may result in fewer stubs. More importantly, we need to
3385 put all .init* and .fini* stubs at the beginning of the .init or
3386 .fini output sections respectively, because glibc splits the
3387 _init and _fini functions into multiple parts. Putting a stub in
3388 the middle of a function is not a good idea. */
3389
3390 static void
3391 group_sections (struct elf32_arm_link_hash_table *htab,
3392 bfd_size_type stub_group_size,
3393 bfd_boolean stubs_always_before_branch)
3394 {
3395 asection **list = htab->input_list + htab->top_index;
3396
3397 do
3398 {
3399 asection *tail = *list;
3400
3401 if (tail == bfd_abs_section_ptr)
3402 continue;
3403
3404 while (tail != NULL)
3405 {
3406 asection *curr;
3407 asection *prev;
3408 bfd_size_type total;
3409
3410 curr = tail;
3411 total = tail->size;
3412 while ((prev = PREV_SEC (curr)) != NULL
3413 && ((total += curr->output_offset - prev->output_offset)
3414 < stub_group_size))
3415 curr = prev;
3416
3417 /* OK, the size from the start of CURR to the end is less
3418 than stub_group_size and thus can be handled by one stub
3419 section. (Or the tail section is itself larger than
3420 stub_group_size, in which case we may be toast.)
3421 We should really be keeping track of the total size of
3422 stubs added here, as stubs contribute to the final output
3423 section size. */
3424 do
3425 {
3426 prev = PREV_SEC (tail);
3427 /* Set up this stub group. */
3428 htab->stub_group[tail->id].link_sec = curr;
3429 }
3430 while (tail != curr && (tail = prev) != NULL);
3431
3432 /* But wait, there's more! Input sections up to stub_group_size
3433 bytes before the stub section can be handled by it too. */
3434 if (!stubs_always_before_branch)
3435 {
3436 total = 0;
3437 while (prev != NULL
3438 && ((total += tail->output_offset - prev->output_offset)
3439 < stub_group_size))
3440 {
3441 tail = prev;
3442 prev = PREV_SEC (tail);
3443 htab->stub_group[tail->id].link_sec = curr;
3444 }
3445 }
3446 tail = prev;
3447 }
3448 }
3449 while (list-- != htab->input_list);
3450
3451 free (htab->input_list);
3452 #undef PREV_SEC
3453 }
3454
3455 /* Determine and set the size of the stub section for a final link.
3456
3457 The basic idea here is to examine all the relocations looking for
3458 PC-relative calls to a target that is unreachable with a "bl"
3459 instruction. */
3460
3461 bfd_boolean
3462 elf32_arm_size_stubs (bfd *output_bfd,
3463 bfd *stub_bfd,
3464 struct bfd_link_info *info,
3465 bfd_signed_vma group_size,
3466 asection * (*add_stub_section) (const char *, asection *),
3467 void (*layout_sections_again) (void))
3468 {
3469 bfd_size_type stub_group_size;
3470 bfd_boolean stubs_always_before_branch;
3471 bfd_boolean stub_changed = 0;
3472 struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info);
3473
3474 /* Propagate mach to stub bfd, because it may not have been
3475 finalized when we created stub_bfd. */
3476 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3477 bfd_get_mach (output_bfd));
3478
3479 /* Stash our params away. */
3480 htab->stub_bfd = stub_bfd;
3481 htab->add_stub_section = add_stub_section;
3482 htab->layout_sections_again = layout_sections_again;
3483 stubs_always_before_branch = group_size < 0;
3484 if (group_size < 0)
3485 stub_group_size = -group_size;
3486 else
3487 stub_group_size = group_size;
3488
3489 if (stub_group_size == 1)
3490 {
3491 /* Default values. */
3492 /* Thumb branch range is +-4MB has to be used as the default
3493 maximum size (a given section can contain both ARM and Thumb
3494 code, so the worst case has to be taken into account).
3495
3496 This value is 24K less than that, which allows for 2025
3497 12-byte stubs. If we exceed that, then we will fail to link.
3498 The user will have to relink with an explicit group size
3499 option. */
3500 stub_group_size = 4170000;
3501 }
3502
3503 group_sections (htab, stub_group_size, stubs_always_before_branch);
3504
3505 while (1)
3506 {
3507 bfd *input_bfd;
3508 unsigned int bfd_indx;
3509 asection *stub_sec;
3510
3511 for (input_bfd = info->input_bfds, bfd_indx = 0;
3512 input_bfd != NULL;
3513 input_bfd = input_bfd->link_next, bfd_indx++)
3514 {
3515 Elf_Internal_Shdr *symtab_hdr;
3516 asection *section;
3517 Elf_Internal_Sym *local_syms = NULL;
3518
3519 /* We'll need the symbol table in a second. */
3520 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3521 if (symtab_hdr->sh_info == 0)
3522 continue;
3523
3524 /* Walk over each section attached to the input bfd. */
3525 for (section = input_bfd->sections;
3526 section != NULL;
3527 section = section->next)
3528 {
3529 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3530
3531 /* If there aren't any relocs, then there's nothing more
3532 to do. */
3533 if ((section->flags & SEC_RELOC) == 0
3534 || section->reloc_count == 0
3535 || (section->flags & SEC_CODE) == 0)
3536 continue;
3537
3538 /* If this section is a link-once section that will be
3539 discarded, then don't create any stubs. */
3540 if (section->output_section == NULL
3541 || section->output_section->owner != output_bfd)
3542 continue;
3543
3544 /* Get the relocs. */
3545 internal_relocs
3546 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3547 NULL, info->keep_memory);
3548 if (internal_relocs == NULL)
3549 goto error_ret_free_local;
3550
3551 /* Now examine each relocation. */
3552 irela = internal_relocs;
3553 irelaend = irela + section->reloc_count;
3554 for (; irela < irelaend; irela++)
3555 {
3556 unsigned int r_type, r_indx;
3557 enum elf32_arm_stub_type stub_type;
3558 struct elf32_arm_stub_hash_entry *stub_entry;
3559 asection *sym_sec;
3560 bfd_vma sym_value;
3561 bfd_vma destination;
3562 struct elf32_arm_link_hash_entry *hash;
3563 const char *sym_name;
3564 char *stub_name;
3565 const asection *id_sec;
3566 unsigned char st_type;
3567
3568 r_type = ELF32_R_TYPE (irela->r_info);
3569 r_indx = ELF32_R_SYM (irela->r_info);
3570
3571 if (r_type >= (unsigned int) R_ARM_max)
3572 {
3573 bfd_set_error (bfd_error_bad_value);
3574 error_ret_free_internal:
3575 if (elf_section_data (section)->relocs == NULL)
3576 free (internal_relocs);
3577 goto error_ret_free_local;
3578 }
3579
3580 /* Only look for stubs on call instructions. */
3581 if ((r_type != (unsigned int) R_ARM_CALL)
3582 && (r_type != (unsigned int) R_ARM_THM_CALL))
3583 continue;
3584
3585 /* Now determine the call target, its name, value,
3586 section. */
3587 sym_sec = NULL;
3588 sym_value = 0;
3589 destination = 0;
3590 hash = NULL;
3591 sym_name = NULL;
3592 if (r_indx < symtab_hdr->sh_info)
3593 {
3594 /* It's a local symbol. */
3595 Elf_Internal_Sym *sym;
3596 Elf_Internal_Shdr *hdr;
3597
3598 if (local_syms == NULL)
3599 {
3600 local_syms
3601 = (Elf_Internal_Sym *) symtab_hdr->contents;
3602 if (local_syms == NULL)
3603 local_syms
3604 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3605 symtab_hdr->sh_info, 0,
3606 NULL, NULL, NULL);
3607 if (local_syms == NULL)
3608 goto error_ret_free_internal;
3609 }
3610
3611 sym = local_syms + r_indx;
3612 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3613 sym_sec = hdr->bfd_section;
3614 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3615 sym_value = sym->st_value;
3616 destination = (sym_value + irela->r_addend
3617 + sym_sec->output_offset
3618 + sym_sec->output_section->vma);
3619 st_type = ELF_ST_TYPE (sym->st_info);
3620 sym_name
3621 = bfd_elf_string_from_elf_section (input_bfd,
3622 symtab_hdr->sh_link,
3623 sym->st_name);
3624 }
3625 else
3626 {
3627 /* It's an external symbol. */
3628 int e_indx;
3629
3630 e_indx = r_indx - symtab_hdr->sh_info;
3631 hash = ((struct elf32_arm_link_hash_entry *)
3632 elf_sym_hashes (input_bfd)[e_indx]);
3633
3634 while (hash->root.root.type == bfd_link_hash_indirect
3635 || hash->root.root.type == bfd_link_hash_warning)
3636 hash = ((struct elf32_arm_link_hash_entry *)
3637 hash->root.root.u.i.link);
3638
3639 if (hash->root.root.type == bfd_link_hash_defined
3640 || hash->root.root.type == bfd_link_hash_defweak)
3641 {
3642 sym_sec = hash->root.root.u.def.section;
3643 sym_value = hash->root.root.u.def.value;
3644 if (sym_sec->output_section != NULL)
3645 destination = (sym_value + irela->r_addend
3646 + sym_sec->output_offset
3647 + sym_sec->output_section->vma);
3648 }
3649 else if (hash->root.root.type == bfd_link_hash_undefweak
3650 || hash->root.root.type == bfd_link_hash_undefined)
3651 /* For a shared library, these will need a PLT stub,
3652 which is treated separately.
3653 For absolute code, they cannot be handled. */
3654 continue;
3655 else
3656 {
3657 bfd_set_error (bfd_error_bad_value);
3658 goto error_ret_free_internal;
3659 }
3660 st_type = ELF_ST_TYPE (hash->root.type);
3661 sym_name = hash->root.root.root.string;
3662 }
3663
3664 /* Determine what (if any) linker stub is needed. */
3665 stub_type = arm_type_of_stub (info, section, irela, st_type,
3666 hash, destination, sym_sec,
3667 input_bfd, sym_name);
3668 if (stub_type == arm_stub_none)
3669 continue;
3670
3671 /* Support for grouping stub sections. */
3672 id_sec = htab->stub_group[section->id].link_sec;
3673
3674 /* Get the name of this stub. */
3675 stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, irela);
3676 if (!stub_name)
3677 goto error_ret_free_internal;
3678
3679 stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table,
3680 stub_name,
3681 FALSE, FALSE);
3682 if (stub_entry != NULL)
3683 {
3684 /* The proper stub has already been created. */
3685 free (stub_name);
3686 continue;
3687 }
3688
3689 stub_entry = elf32_arm_add_stub (stub_name, section, htab);
3690 if (stub_entry == NULL)
3691 {
3692 free (stub_name);
3693 goto error_ret_free_internal;
3694 }
3695
3696 stub_entry->target_value = sym_value;
3697 stub_entry->target_section = sym_sec;
3698 stub_entry->stub_type = stub_type;
3699 stub_entry->h = hash;
3700 stub_entry->st_type = st_type;
3701
3702 if (sym_name == NULL)
3703 sym_name = "unnamed";
3704 stub_entry->output_name
3705 = bfd_alloc (htab->stub_bfd,
3706 sizeof (THUMB2ARM_GLUE_ENTRY_NAME)
3707 + strlen (sym_name));
3708 if (stub_entry->output_name == NULL)
3709 {
3710 free (stub_name);
3711 goto error_ret_free_internal;
3712 }
3713
3714 /* For historical reasons, use the existing names for
3715 ARM-to-Thumb and Thumb-to-ARM stubs. */
3716 if (r_type == (unsigned int) R_ARM_THM_CALL
3717 && st_type != STT_ARM_TFUNC)
3718 sprintf (stub_entry->output_name, THUMB2ARM_GLUE_ENTRY_NAME,
3719 sym_name);
3720 else if (r_type == (unsigned int) R_ARM_CALL
3721 && st_type == STT_ARM_TFUNC)
3722 sprintf (stub_entry->output_name, ARM2THUMB_GLUE_ENTRY_NAME,
3723 sym_name);
3724 else
3725 sprintf (stub_entry->output_name, STUB_ENTRY_NAME,
3726 sym_name);
3727
3728 stub_changed = TRUE;
3729 }
3730
3731 /* We're done with the internal relocs, free them. */
3732 if (elf_section_data (section)->relocs == NULL)
3733 free (internal_relocs);
3734 }
3735 }
3736
3737 if (!stub_changed)
3738 break;
3739
3740 /* OK, we've added some stubs. Find out the new size of the
3741 stub sections. */
3742 for (stub_sec = htab->stub_bfd->sections;
3743 stub_sec != NULL;
3744 stub_sec = stub_sec->next)
3745 stub_sec->size = 0;
3746
3747 bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab);
3748
3749 /* Ask the linker to do its stuff. */
3750 (*htab->layout_sections_again) ();
3751 stub_changed = FALSE;
3752 }
3753
3754 return TRUE;
3755
3756 error_ret_free_local:
3757 return FALSE;
3758 }
3759
3760 /* Build all the stubs associated with the current output file. The
3761 stubs are kept in a hash table attached to the main linker hash
3762 table. We also set up the .plt entries for statically linked PIC
3763 functions here. This function is called via arm_elf_finish in the
3764 linker. */
3765
3766 bfd_boolean
3767 elf32_arm_build_stubs (struct bfd_link_info *info)
3768 {
3769 asection *stub_sec;
3770 struct bfd_hash_table *table;
3771 struct elf32_arm_link_hash_table *htab;
3772
3773 htab = elf32_arm_hash_table (info);
3774
3775 for (stub_sec = htab->stub_bfd->sections;
3776 stub_sec != NULL;
3777 stub_sec = stub_sec->next)
3778 {
3779 bfd_size_type size;
3780
3781 /* Ignore non-stub sections. */
3782 if (!strstr (stub_sec->name, STUB_SUFFIX))
3783 continue;
3784
3785 /* Allocate memory to hold the linker stubs. */
3786 size = stub_sec->size;
3787 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3788 if (stub_sec->contents == NULL && size != 0)
3789 return FALSE;
3790 stub_sec->size = 0;
3791 }
3792
3793 /* Build the stubs as directed by the stub hash table. */
3794 table = &htab->stub_hash_table;
3795 bfd_hash_traverse (table, arm_build_one_stub, info);
3796
3797 return TRUE;
3798 }
3799
3800 /* Locate the Thumb encoded calling stub for NAME. */
3801
3802 static struct elf_link_hash_entry *
3803 find_thumb_glue (struct bfd_link_info *link_info,
3804 const char *name,
3805 char **error_message)
3806 {
3807 char *tmp_name;
3808 struct elf_link_hash_entry *hash;
3809 struct elf32_arm_link_hash_table *hash_table;
3810
3811 /* We need a pointer to the armelf specific hash table. */
3812 hash_table = elf32_arm_hash_table (link_info);
3813
3814 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
3815 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
3816
3817 BFD_ASSERT (tmp_name);
3818
3819 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
3820
3821 hash = elf_link_hash_lookup
3822 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
3823
3824 if (hash == NULL
3825 && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"),
3826 tmp_name, name) == -1)
3827 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
3828
3829 free (tmp_name);
3830
3831 return hash;
3832 }
3833
3834 /* Locate the ARM encoded calling stub for NAME. */
3835
3836 static struct elf_link_hash_entry *
3837 find_arm_glue (struct bfd_link_info *link_info,
3838 const char *name,
3839 char **error_message)
3840 {
3841 char *tmp_name;
3842 struct elf_link_hash_entry *myh;
3843 struct elf32_arm_link_hash_table *hash_table;
3844
3845 /* We need a pointer to the elfarm specific hash table. */
3846 hash_table = elf32_arm_hash_table (link_info);
3847
3848 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
3849 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
3850
3851 BFD_ASSERT (tmp_name);
3852
3853 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
3854
3855 myh = elf_link_hash_lookup
3856 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
3857
3858 if (myh == NULL
3859 && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"),
3860 tmp_name, name) == -1)
3861 *error_message = (char *) bfd_errmsg (bfd_error_system_call);
3862
3863 free (tmp_name);
3864
3865 return myh;
3866 }
3867
3868 /* ARM->Thumb glue (static images):
3869
3870 .arm
3871 __func_from_arm:
3872 ldr r12, __func_addr
3873 bx r12
3874 __func_addr:
3875 .word func @ behave as if you saw a ARM_32 reloc.
3876
3877 (v5t static images)
3878 .arm
3879 __func_from_arm:
3880 ldr pc, __func_addr
3881 __func_addr:
3882 .word func @ behave as if you saw a ARM_32 reloc.
3883
3884 (relocatable images)
3885 .arm
3886 __func_from_arm:
3887 ldr r12, __func_offset
3888 add r12, r12, pc
3889 bx r12
3890 __func_offset:
3891 .word func - . */
3892
3893 #define ARM2THUMB_STATIC_GLUE_SIZE 12
3894 static const insn32 a2t1_ldr_insn = 0xe59fc000;
3895 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
3896 static const insn32 a2t3_func_addr_insn = 0x00000001;
3897
3898 #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8
3899 static const insn32 a2t1v5_ldr_insn = 0xe51ff004;
3900 static const insn32 a2t2v5_func_addr_insn = 0x00000001;
3901
3902 #define ARM2THUMB_PIC_GLUE_SIZE 16
3903 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
3904 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
3905 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
3906
3907 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
3908
3909 .thumb .thumb
3910 .align 2 .align 2
3911 __func_from_thumb: __func_from_thumb:
3912 bx pc push {r6, lr}
3913 nop ldr r6, __func_addr
3914 .arm mov lr, pc
3915 b func bx r6
3916 .arm
3917 ;; back_to_thumb
3918 ldmia r13! {r6, lr}
3919 bx lr
3920 __func_addr:
3921 .word func */
3922
3923 #define THUMB2ARM_GLUE_SIZE 8
3924 static const insn16 t2a1_bx_pc_insn = 0x4778;
3925 static const insn16 t2a2_noop_insn = 0x46c0;
3926 static const insn32 t2a3_b_insn = 0xea000000;
3927
3928 #define VFP11_ERRATUM_VENEER_SIZE 8
3929
3930 #define ARM_BX_VENEER_SIZE 12
3931 static const insn32 armbx1_tst_insn = 0xe3100001;
3932 static const insn32 armbx2_moveq_insn = 0x01a0f000;
3933 static const insn32 armbx3_bx_insn = 0xe12fff10;
3934
3935 #ifndef ELFARM_NABI_C_INCLUDED
3936 static void
3937 arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name)
3938 {
3939 asection * s;
3940 bfd_byte * contents;
3941
3942 if (size == 0)
3943 return;
3944
3945 BFD_ASSERT (abfd != NULL);
3946
3947 s = bfd_get_section_by_name (abfd, name);
3948 BFD_ASSERT (s != NULL);
3949
3950 contents = bfd_alloc (abfd, size);
3951
3952 BFD_ASSERT (s->size == size);
3953 s->contents = contents;
3954 }
3955
3956 bfd_boolean
3957 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
3958 {
3959 struct elf32_arm_link_hash_table * globals;
3960
3961 globals = elf32_arm_hash_table (info);
3962 BFD_ASSERT (globals != NULL);
3963
3964 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3965 globals->arm_glue_size,
3966 ARM2THUMB_GLUE_SECTION_NAME);
3967
3968 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3969 globals->thumb_glue_size,
3970 THUMB2ARM_GLUE_SECTION_NAME);
3971
3972 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3973 globals->vfp11_erratum_glue_size,
3974 VFP11_ERRATUM_VENEER_SECTION_NAME);
3975
3976 arm_allocate_glue_section_space (globals->bfd_of_glue_owner,
3977 globals->bx_glue_size,
3978 ARM_BX_GLUE_SECTION_NAME);
3979
3980 return TRUE;
3981 }
3982
3983 /* Allocate space and symbols for calling a Thumb function from Arm mode.
3984 returns the symbol identifying the stub. */
3985
3986 static struct elf_link_hash_entry *
3987 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
3988 struct elf_link_hash_entry * h)
3989 {
3990 const char * name = h->root.root.string;
3991 asection * s;
3992 char * tmp_name;
3993 struct elf_link_hash_entry * myh;
3994 struct bfd_link_hash_entry * bh;
3995 struct elf32_arm_link_hash_table * globals;
3996 bfd_vma val;
3997 bfd_size_type size;
3998
3999 globals = elf32_arm_hash_table (link_info);
4000
4001 BFD_ASSERT (globals != NULL);
4002 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4003
4004 s = bfd_get_section_by_name
4005 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
4006
4007 BFD_ASSERT (s != NULL);
4008
4009 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
4010
4011 BFD_ASSERT (tmp_name);
4012
4013 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
4014
4015 myh = elf_link_hash_lookup
4016 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
4017
4018 if (myh != NULL)
4019 {
4020 /* We've already seen this guy. */
4021 free (tmp_name);
4022 return myh;
4023 }
4024
4025 /* The only trick here is using hash_table->arm_glue_size as the value.
4026 Even though the section isn't allocated yet, this is where we will be
4027 putting it. The +1 on the value marks that the stub has not been
4028 output yet - not that it is a Thumb function. */
4029 bh = NULL;
4030 val = globals->arm_glue_size + 1;
4031 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4032 tmp_name, BSF_GLOBAL, s, val,
4033 NULL, TRUE, FALSE, &bh);
4034
4035 myh = (struct elf_link_hash_entry *) bh;
4036 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4037 myh->forced_local = 1;
4038
4039 free (tmp_name);
4040
4041 if (link_info->shared || globals->root.is_relocatable_executable
4042 || globals->pic_veneer)
4043 size = ARM2THUMB_PIC_GLUE_SIZE;
4044 else if (globals->use_blx)
4045 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
4046 else
4047 size = ARM2THUMB_STATIC_GLUE_SIZE;
4048
4049 s->size += size;
4050 globals->arm_glue_size += size;
4051
4052 return myh;
4053 }
4054
4055 static void
4056 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
4057 struct elf_link_hash_entry *h)
4058 {
4059 const char *name = h->root.root.string;
4060 asection *s;
4061 char *tmp_name;
4062 struct elf_link_hash_entry *myh;
4063 struct bfd_link_hash_entry *bh;
4064 struct elf32_arm_link_hash_table *hash_table;
4065 bfd_vma val;
4066
4067 hash_table = elf32_arm_hash_table (link_info);
4068
4069 BFD_ASSERT (hash_table != NULL);
4070 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
4071
4072 s = bfd_get_section_by_name
4073 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
4074
4075 BFD_ASSERT (s != NULL);
4076
4077 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4078 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
4079
4080 BFD_ASSERT (tmp_name);
4081
4082 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
4083
4084 myh = elf_link_hash_lookup
4085 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
4086
4087 if (myh != NULL)
4088 {
4089 /* We've already seen this guy. */
4090 free (tmp_name);
4091 return;
4092 }
4093
4094 /* The only trick here is using hash_table->thumb_glue_size as the value.
4095 Even though the section isn't allocated yet, this is where we will be
4096 putting it. The +1 on the value marks that the stub has not been
4097 output yet - not that it is a Thumb function. */
4098 bh = NULL;
4099 val = hash_table->thumb_glue_size + 1;
4100 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4101 tmp_name, BSF_GLOBAL, s, val,
4102 NULL, TRUE, FALSE, &bh);
4103
4104 /* If we mark it 'Thumb', the disassembler will do a better job. */
4105 myh = (struct elf_link_hash_entry *) bh;
4106 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
4107 myh->forced_local = 1;
4108
4109 free (tmp_name);
4110
4111 #define CHANGE_TO_ARM "__%s_change_to_arm"
4112 #define BACK_FROM_ARM "__%s_back_from_arm"
4113
4114 /* Allocate another symbol to mark where we switch to Arm mode. */
4115 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
4116 + strlen (CHANGE_TO_ARM) + 1);
4117
4118 BFD_ASSERT (tmp_name);
4119
4120 sprintf (tmp_name, CHANGE_TO_ARM, name);
4121
4122 bh = NULL;
4123 val = hash_table->thumb_glue_size + 4,
4124 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4125 tmp_name, BSF_LOCAL, s, val,
4126 NULL, TRUE, FALSE, &bh);
4127
4128 free (tmp_name);
4129
4130 s->size += THUMB2ARM_GLUE_SIZE;
4131 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
4132 }
4133
4134
4135 /* Allocate space for ARMv4 BX veneers. */
4136
4137 static void
4138 record_arm_bx_glue (struct bfd_link_info * link_info, int reg)
4139 {
4140 asection * s;
4141 struct elf32_arm_link_hash_table *globals;
4142 char *tmp_name;
4143 struct elf_link_hash_entry *myh;
4144 struct bfd_link_hash_entry *bh;
4145 bfd_vma val;
4146
4147 /* BX PC does not need a veneer. */
4148 if (reg == 15)
4149 return;
4150
4151 globals = elf32_arm_hash_table (link_info);
4152
4153 BFD_ASSERT (globals != NULL);
4154 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
4155
4156 /* Check if this veneer has already been allocated. */
4157 if (globals->bx_glue_offset[reg])
4158 return;
4159
4160 s = bfd_get_section_by_name
4161 (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME);
4162
4163 BFD_ASSERT (s != NULL);
4164
4165 /* Add symbol for veneer. */
4166 tmp_name = bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1);
4167
4168 BFD_ASSERT (tmp_name);
4169
4170 sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg);
4171
4172 myh = elf_link_hash_lookup
4173 (&(globals)->root, tmp_name, FALSE, FALSE, FALSE);
4174
4175 BFD_ASSERT (myh == NULL);
4176
4177 bh = NULL;
4178 val = globals->bx_glue_size;
4179 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
4180 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4181 NULL, TRUE, FALSE, &bh);
4182
4183 myh = (struct elf_link_hash_entry *) bh;
4184 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4185 myh->forced_local = 1;
4186
4187 s->size += ARM_BX_VENEER_SIZE;
4188 globals->bx_glue_offset[reg] = globals->bx_glue_size | 2;
4189 globals->bx_glue_size += ARM_BX_VENEER_SIZE;
4190 }
4191
4192
4193 /* Add an entry to the code/data map for section SEC. */
4194
4195 static void
4196 elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma)
4197 {
4198 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
4199 unsigned int newidx;
4200
4201 if (sec_data->map == NULL)
4202 {
4203 sec_data->map = bfd_malloc (sizeof (elf32_arm_section_map));
4204 sec_data->mapcount = 0;
4205 sec_data->mapsize = 1;
4206 }
4207
4208 newidx = sec_data->mapcount++;
4209
4210 if (sec_data->mapcount > sec_data->mapsize)
4211 {
4212 sec_data->mapsize *= 2;
4213 sec_data->map = bfd_realloc_or_free (sec_data->map, sec_data->mapsize
4214 * sizeof (elf32_arm_section_map));
4215 }
4216
4217 if (sec_data->map)
4218 {
4219 sec_data->map[newidx].vma = vma;
4220 sec_data->map[newidx].type = type;
4221 }
4222 }
4223
4224
4225 /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode
4226 veneers are handled for now. */
4227
4228 static bfd_vma
4229 record_vfp11_erratum_veneer (struct bfd_link_info *link_info,
4230 elf32_vfp11_erratum_list *branch,
4231 bfd *branch_bfd,
4232 asection *branch_sec,
4233 unsigned int offset)
4234 {
4235 asection *s;
4236 struct elf32_arm_link_hash_table *hash_table;
4237 char *tmp_name;
4238 struct elf_link_hash_entry *myh;
4239 struct bfd_link_hash_entry *bh;
4240 bfd_vma val;
4241 struct _arm_elf_section_data *sec_data;
4242 int errcount;
4243 elf32_vfp11_erratum_list *newerr;
4244
4245 hash_table = elf32_arm_hash_table (link_info);
4246
4247 BFD_ASSERT (hash_table != NULL);
4248 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
4249
4250 s = bfd_get_section_by_name
4251 (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME);
4252
4253 sec_data = elf32_arm_section_data (s);
4254
4255 BFD_ASSERT (s != NULL);
4256
4257 tmp_name = bfd_malloc ((bfd_size_type) strlen
4258 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
4259
4260 BFD_ASSERT (tmp_name);
4261
4262 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
4263 hash_table->num_vfp11_fixes);
4264
4265 myh = elf_link_hash_lookup
4266 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4267
4268 BFD_ASSERT (myh == NULL);
4269
4270 bh = NULL;
4271 val = hash_table->vfp11_erratum_glue_size;
4272 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
4273 tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val,
4274 NULL, TRUE, FALSE, &bh);
4275
4276 myh = (struct elf_link_hash_entry *) bh;
4277 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4278 myh->forced_local = 1;
4279
4280 /* Link veneer back to calling location. */
4281 errcount = ++(sec_data->erratumcount);
4282 newerr = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
4283
4284 newerr->type = VFP11_ERRATUM_ARM_VENEER;
4285 newerr->vma = -1;
4286 newerr->u.v.branch = branch;
4287 newerr->u.v.id = hash_table->num_vfp11_fixes;
4288 branch->u.b.veneer = newerr;
4289
4290 newerr->next = sec_data->erratumlist;
4291 sec_data->erratumlist = newerr;
4292
4293 /* A symbol for the return from the veneer. */
4294 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
4295 hash_table->num_vfp11_fixes);
4296
4297 myh = elf_link_hash_lookup
4298 (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE);
4299
4300 if (myh != NULL)
4301 abort ();
4302
4303 bh = NULL;
4304 val = offset + 4;
4305 _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL,
4306 branch_sec, val, NULL, TRUE, FALSE, &bh);
4307
4308 myh = (struct elf_link_hash_entry *) bh;
4309 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
4310 myh->forced_local = 1;
4311
4312 free (tmp_name);
4313
4314 /* Generate a mapping symbol for the veneer section, and explicitly add an
4315 entry for that symbol to the code/data map for the section. */
4316 if (hash_table->vfp11_erratum_glue_size == 0)
4317 {
4318 bh = NULL;
4319 /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it
4320 ever requires this erratum fix. */
4321 _bfd_generic_link_add_one_symbol (link_info,
4322 hash_table->bfd_of_glue_owner, "$a",
4323 BSF_LOCAL, s, 0, NULL,
4324 TRUE, FALSE, &bh);
4325
4326 myh = (struct elf_link_hash_entry *) bh;
4327 myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
4328 myh->forced_local = 1;
4329
4330 /* The elf32_arm_init_maps function only cares about symbols from input
4331 BFDs. We must make a note of this generated mapping symbol
4332 ourselves so that code byteswapping works properly in
4333 elf32_arm_write_section. */
4334 elf32_arm_section_map_add (s, 'a', 0);
4335 }
4336
4337 s->size += VFP11_ERRATUM_VENEER_SIZE;
4338 hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE;
4339 hash_table->num_vfp11_fixes++;
4340
4341 /* The offset of the veneer. */
4342 return val;
4343 }
4344
4345 /* Note: we do not include the flag SEC_LINKER_CREATED, as that
4346 would prevent elf_link_input_bfd() from processing the contents
4347 of the section. */
4348 #define ARM_GLUE_SECTION_FLAGS \
4349 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY)
4350
4351 /* Create a fake section for use by the ARM backend of the linker. */
4352
4353 static bfd_boolean
4354 arm_make_glue_section (bfd * abfd, const char * name)
4355 {
4356 asection * sec;
4357
4358 sec = bfd_get_section_by_name (abfd, name);
4359 if (sec != NULL)
4360 /* Already made. */
4361 return TRUE;
4362
4363 sec = bfd_make_section_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS);
4364
4365 if (sec == NULL
4366 || !bfd_set_section_alignment (abfd, sec, 2))
4367 return FALSE;
4368
4369 /* Set the gc mark to prevent the section from being removed by garbage
4370 collection, despite the fact that no relocs refer to this section. */
4371 sec->gc_mark = 1;
4372
4373 return TRUE;
4374 }
4375
4376 /* Add the glue sections to ABFD. This function is called from the
4377 linker scripts in ld/emultempl/{armelf}.em. */
4378
4379 bfd_boolean
4380 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
4381 struct bfd_link_info *info)
4382 {
4383 /* If we are only performing a partial
4384 link do not bother adding the glue. */
4385 if (info->relocatable)
4386 return TRUE;
4387
4388 /* Linker stubs don't need glue. */
4389 if (!strcmp (abfd->filename, "linker stubs"))
4390 return TRUE;
4391
4392 return arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME)
4393 && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME)
4394 && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME)
4395 && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME);
4396 }
4397
4398 /* Select a BFD to be used to hold the sections used by the glue code.
4399 This function is called from the linker scripts in ld/emultempl/
4400 {armelf/pe}.em. */
4401
4402 bfd_boolean
4403 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
4404 {
4405 struct elf32_arm_link_hash_table *globals;
4406
4407 /* If we are only performing a partial link
4408 do not bother getting a bfd to hold the glue. */
4409 if (info->relocatable)
4410 return TRUE;
4411
4412 /* Make sure we don't attach the glue sections to a dynamic object. */
4413 BFD_ASSERT (!(abfd->flags & DYNAMIC));
4414
4415 globals = elf32_arm_hash_table (info);
4416
4417 BFD_ASSERT (globals != NULL);
4418
4419 if (globals->bfd_of_glue_owner != NULL)
4420 return TRUE;
4421
4422 /* Save the bfd for later use. */
4423 globals->bfd_of_glue_owner = abfd;
4424
4425 return TRUE;
4426 }
4427
4428 static void
4429 check_use_blx (struct elf32_arm_link_hash_table *globals)
4430 {
4431 if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC,
4432 Tag_CPU_arch) > 2)
4433 globals->use_blx = 1;
4434 }
4435
4436 bfd_boolean
4437 bfd_elf32_arm_process_before_allocation (bfd *abfd,
4438 struct bfd_link_info *link_info)
4439 {
4440 Elf_Internal_Shdr *symtab_hdr;
4441 Elf_Internal_Rela *internal_relocs = NULL;
4442 Elf_Internal_Rela *irel, *irelend;
4443 bfd_byte *contents = NULL;
4444
4445 asection *sec;
4446 struct elf32_arm_link_hash_table *globals;
4447
4448 /* If we are only performing a partial link do not bother
4449 to construct any glue. */
4450 if (link_info->relocatable)
4451 return TRUE;
4452
4453 /* Here we have a bfd that is to be included on the link. We have a
4454 hook to do reloc rummaging, before section sizes are nailed down. */
4455 globals = elf32_arm_hash_table (link_info);
4456
4457 BFD_ASSERT (globals != NULL);
4458
4459 check_use_blx (globals);
4460
4461 if (globals->byteswap_code && !bfd_big_endian (abfd))
4462 {
4463 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
4464 abfd);
4465 return FALSE;
4466 }
4467
4468 /* PR 5398: If we have not decided to include any loadable sections in
4469 the output then we will not have a glue owner bfd. This is OK, it
4470 just means that there is nothing else for us to do here. */
4471 if (globals->bfd_of_glue_owner == NULL)
4472 return TRUE;
4473
4474 /* Rummage around all the relocs and map the glue vectors. */
4475 sec = abfd->sections;
4476
4477 if (sec == NULL)
4478 return TRUE;
4479
4480 for (; sec != NULL; sec = sec->next)
4481 {
4482 if (sec->reloc_count == 0)
4483 continue;
4484
4485 if ((sec->flags & SEC_EXCLUDE) != 0)
4486 continue;
4487
4488 symtab_hdr = & elf_symtab_hdr (abfd);
4489
4490 /* Load the relocs. */
4491 internal_relocs
4492 = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE);
4493
4494 if (internal_relocs == NULL)
4495 goto error_return;
4496
4497 irelend = internal_relocs + sec->reloc_count;
4498 for (irel = internal_relocs; irel < irelend; irel++)
4499 {
4500 long r_type;
4501 unsigned long r_index;
4502
4503 struct elf_link_hash_entry *h;
4504
4505 r_type = ELF32_R_TYPE (irel->r_info);
4506 r_index = ELF32_R_SYM (irel->r_info);
4507
4508 /* These are the only relocation types we care about. */
4509 if ( r_type != R_ARM_PC24
4510 && r_type != R_ARM_PLT32
4511 && r_type != R_ARM_JUMP24
4512 && r_type != R_ARM_THM_JUMP24
4513 && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2))
4514 continue;
4515
4516 /* Get the section contents if we haven't done so already. */
4517 if (contents == NULL)
4518 {
4519 /* Get cached copy if it exists. */
4520 if (elf_section_data (sec)->this_hdr.contents != NULL)
4521 contents = elf_section_data (sec)->this_hdr.contents;
4522 else
4523 {
4524 /* Go get them off disk. */
4525 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
4526 goto error_return;
4527 }
4528 }
4529
4530 if (r_type == R_ARM_V4BX)
4531 {
4532 int reg;
4533
4534 reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf;
4535 record_arm_bx_glue (link_info, reg);
4536 continue;
4537 }
4538
4539 /* If the relocation is not against a symbol it cannot concern us. */
4540 h = NULL;
4541
4542 /* We don't care about local symbols. */
4543 if (r_index < symtab_hdr->sh_info)
4544 continue;
4545
4546 /* This is an external symbol. */
4547 r_index -= symtab_hdr->sh_info;
4548 h = (struct elf_link_hash_entry *)
4549 elf_sym_hashes (abfd)[r_index];
4550
4551 /* If the relocation is against a static symbol it must be within
4552 the current section and so cannot be a cross ARM/Thumb relocation. */
4553 if (h == NULL)
4554 continue;
4555
4556 /* If the call will go through a PLT entry then we do not need
4557 glue. */
4558 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
4559 continue;
4560
4561 switch (r_type)
4562 {
4563 case R_ARM_PC24:
4564 case R_ARM_PLT32:
4565 case R_ARM_JUMP24:
4566 /* This one is a call from arm code. We need to look up
4567 the target of the call. If it is a thumb target, we
4568 insert glue. */
4569 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
4570 && !(r_type == R_ARM_CALL && globals->use_blx))
4571 record_arm_to_thumb_glue (link_info, h);
4572 break;
4573
4574 case R_ARM_THM_JUMP24:
4575 /* This one is a call from thumb code. We look
4576 up the target of the call. If it is not a thumb
4577 target, we insert glue. */
4578 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC
4579 && !(globals->use_blx && r_type == R_ARM_THM_CALL)
4580 && h->root.type != bfd_link_hash_undefweak)
4581 record_thumb_to_arm_glue (link_info, h);
4582 break;
4583
4584 default:
4585 abort ();
4586 }
4587 }
4588
4589 if (contents != NULL
4590 && elf_section_data (sec)->this_hdr.contents != contents)
4591 free (contents);
4592 contents = NULL;
4593
4594 if (internal_relocs != NULL
4595 && elf_section_data (sec)->relocs != internal_relocs)
4596 free (internal_relocs);
4597 internal_relocs = NULL;
4598 }
4599
4600 return TRUE;
4601
4602 error_return:
4603 if (contents != NULL
4604 && elf_section_data (sec)->this_hdr.contents != contents)
4605 free (contents);
4606 if (internal_relocs != NULL
4607 && elf_section_data (sec)->relocs != internal_relocs)
4608 free (internal_relocs);
4609
4610 return FALSE;
4611 }
4612 #endif
4613
4614
4615 /* Initialise maps of ARM/Thumb/data for input BFDs. */
4616
4617 void
4618 bfd_elf32_arm_init_maps (bfd *abfd)
4619 {
4620 Elf_Internal_Sym *isymbuf;
4621 Elf_Internal_Shdr *hdr;
4622 unsigned int i, localsyms;
4623
4624 if ((abfd->flags & DYNAMIC) != 0)
4625 return;
4626
4627 hdr = & elf_symtab_hdr (abfd);
4628 localsyms = hdr->sh_info;
4629
4630 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4631 should contain the number of local symbols, which should come before any
4632 global symbols. Mapping symbols are always local. */
4633 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL,
4634 NULL);
4635
4636 /* No internal symbols read? Skip this BFD. */
4637 if (isymbuf == NULL)
4638 return;
4639
4640 for (i = 0; i < localsyms; i++)
4641 {
4642 Elf_Internal_Sym *isym = &isymbuf[i];
4643 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4644 const char *name;
4645
4646 if (sec != NULL
4647 && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4648 {
4649 name = bfd_elf_string_from_elf_section (abfd,
4650 hdr->sh_link, isym->st_name);
4651
4652 if (bfd_is_arm_special_symbol_name (name,
4653 BFD_ARM_SPECIAL_SYM_TYPE_MAP))
4654 elf32_arm_section_map_add (sec, name[1], isym->st_value);
4655 }
4656 }
4657 }
4658
4659
4660 void
4661 bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info)
4662 {
4663 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
4664 obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd);
4665
4666 /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */
4667 if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7)
4668 {
4669 switch (globals->vfp11_fix)
4670 {
4671 case BFD_ARM_VFP11_FIX_DEFAULT:
4672 case BFD_ARM_VFP11_FIX_NONE:
4673 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4674 break;
4675
4676 default:
4677 /* Give a warning, but do as the user requests anyway. */
4678 (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum "
4679 "workaround is not necessary for target architecture"), obfd);
4680 }
4681 }
4682 else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT)
4683 /* For earlier architectures, we might need the workaround, but do not
4684 enable it by default. If users is running with broken hardware, they
4685 must enable the erratum fix explicitly. */
4686 globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE;
4687 }
4688
4689
4690 enum bfd_arm_vfp11_pipe
4691 {
4692 VFP11_FMAC,
4693 VFP11_LS,
4694 VFP11_DS,
4695 VFP11_BAD
4696 };
4697
4698 /* Return a VFP register number. This is encoded as RX:X for single-precision
4699 registers, or X:RX for double-precision registers, where RX is the group of
4700 four bits in the instruction encoding and X is the single extension bit.
4701 RX and X fields are specified using their lowest (starting) bit. The return
4702 value is:
4703
4704 0...31: single-precision registers s0...s31
4705 32...63: double-precision registers d0...d31.
4706
4707 Although X should be zero for VFP11 (encoding d0...d15 only), we might
4708 encounter VFP3 instructions, so we allow the full range for DP registers. */
4709
4710 static unsigned int
4711 bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx,
4712 unsigned int x)
4713 {
4714 if (is_double)
4715 return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32;
4716 else
4717 return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1);
4718 }
4719
4720 /* Set bits in *WMASK according to a register number REG as encoded by
4721 bfd_arm_vfp11_regno(). Ignore d16-d31. */
4722
4723 static void
4724 bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg)
4725 {
4726 if (reg < 32)
4727 *wmask |= 1 << reg;
4728 else if (reg < 48)
4729 *wmask |= 3 << ((reg - 32) * 2);
4730 }
4731
4732 /* Return TRUE if WMASK overwrites anything in REGS. */
4733
4734 static bfd_boolean
4735 bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs)
4736 {
4737 int i;
4738
4739 for (i = 0; i < numregs; i++)
4740 {
4741 unsigned int reg = regs[i];
4742
4743 if (reg < 32 && (wmask & (1 << reg)) != 0)
4744 return TRUE;
4745
4746 reg -= 32;
4747
4748 if (reg >= 16)
4749 continue;
4750
4751 if ((wmask & (3 << (reg * 2))) != 0)
4752 return TRUE;
4753 }
4754
4755 return FALSE;
4756 }
4757
4758 /* In this function, we're interested in two things: finding input registers
4759 for VFP data-processing instructions, and finding the set of registers which
4760 arbitrary VFP instructions may write to. We use a 32-bit unsigned int to
4761 hold the written set, so FLDM etc. are easy to deal with (we're only
4762 interested in 32 SP registers or 16 dp registers, due to the VFP version
4763 implemented by the chip in question). DP registers are marked by setting
4764 both SP registers in the write mask). */
4765
4766 static enum bfd_arm_vfp11_pipe
4767 bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs,
4768 int *numregs)
4769 {
4770 enum bfd_arm_vfp11_pipe pipe = VFP11_BAD;
4771 bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0;
4772
4773 if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */
4774 {
4775 unsigned int pqrs;
4776 unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
4777 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
4778
4779 pqrs = ((insn & 0x00800000) >> 20)
4780 | ((insn & 0x00300000) >> 19)
4781 | ((insn & 0x00000040) >> 6);
4782
4783 switch (pqrs)
4784 {
4785 case 0: /* fmac[sd]. */
4786 case 1: /* fnmac[sd]. */
4787 case 2: /* fmsc[sd]. */
4788 case 3: /* fnmsc[sd]. */
4789 pipe = VFP11_FMAC;
4790 bfd_arm_vfp11_write_mask (destmask, fd);
4791 regs[0] = fd;
4792 regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4793 regs[2] = fm;
4794 *numregs = 3;
4795 break;
4796
4797 case 4: /* fmul[sd]. */
4798 case 5: /* fnmul[sd]. */
4799 case 6: /* fadd[sd]. */
4800 case 7: /* fsub[sd]. */
4801 pipe = VFP11_FMAC;
4802 goto vfp_binop;
4803
4804 case 8: /* fdiv[sd]. */
4805 pipe = VFP11_DS;
4806 vfp_binop:
4807 bfd_arm_vfp11_write_mask (destmask, fd);
4808 regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */
4809 regs[1] = fm;
4810 *numregs = 2;
4811 break;
4812
4813 case 15: /* extended opcode. */
4814 {
4815 unsigned int extn = ((insn >> 15) & 0x1e)
4816 | ((insn >> 7) & 1);
4817
4818 switch (extn)
4819 {
4820 case 0: /* fcpy[sd]. */
4821 case 1: /* fabs[sd]. */
4822 case 2: /* fneg[sd]. */
4823 case 8: /* fcmp[sd]. */
4824 case 9: /* fcmpe[sd]. */
4825 case 10: /* fcmpz[sd]. */
4826 case 11: /* fcmpez[sd]. */
4827 case 16: /* fuito[sd]. */
4828 case 17: /* fsito[sd]. */
4829 case 24: /* ftoui[sd]. */
4830 case 25: /* ftouiz[sd]. */
4831 case 26: /* ftosi[sd]. */
4832 case 27: /* ftosiz[sd]. */
4833 /* These instructions will not bounce due to underflow. */
4834 *numregs = 0;
4835 pipe = VFP11_FMAC;
4836 break;
4837
4838 case 3: /* fsqrt[sd]. */
4839 /* fsqrt cannot underflow, but it can (perhaps) overwrite
4840 registers to cause the erratum in previous instructions. */
4841 bfd_arm_vfp11_write_mask (destmask, fd);
4842 pipe = VFP11_DS;
4843 break;
4844
4845 case 15: /* fcvt{ds,sd}. */
4846 {
4847 int rnum = 0;
4848
4849 bfd_arm_vfp11_write_mask (destmask, fd);
4850
4851 /* Only FCVTSD can underflow. */
4852 if ((insn & 0x100) != 0)
4853 regs[rnum++] = fm;
4854
4855 *numregs = rnum;
4856
4857 pipe = VFP11_FMAC;
4858 }
4859 break;
4860
4861 default:
4862 return VFP11_BAD;
4863 }
4864 }
4865 break;
4866
4867 default:
4868 return VFP11_BAD;
4869 }
4870 }
4871 /* Two-register transfer. */
4872 else if ((insn & 0x0fe00ed0) == 0x0c400a10)
4873 {
4874 unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5);
4875
4876 if ((insn & 0x100000) == 0)
4877 {
4878 if (is_double)
4879 bfd_arm_vfp11_write_mask (destmask, fm);
4880 else
4881 {
4882 bfd_arm_vfp11_write_mask (destmask, fm);
4883 bfd_arm_vfp11_write_mask (destmask, fm + 1);
4884 }
4885 }
4886
4887 pipe = VFP11_LS;
4888 }
4889 else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */
4890 {
4891 int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22);
4892 unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1);
4893
4894 switch (puw)
4895 {
4896 case 0: /* Two-reg transfer. We should catch these above. */
4897 abort ();
4898
4899 case 2: /* fldm[sdx]. */
4900 case 3:
4901 case 5:
4902 {
4903 unsigned int i, offset = insn & 0xff;
4904
4905 if (is_double)
4906 offset >>= 1;
4907
4908 for (i = fd; i < fd + offset; i++)
4909 bfd_arm_vfp11_write_mask (destmask, i);
4910 }
4911 break;
4912
4913 case 4: /* fld[sd]. */
4914 case 6:
4915 bfd_arm_vfp11_write_mask (destmask, fd);
4916 break;
4917
4918 default:
4919 return VFP11_BAD;
4920 }
4921
4922 pipe = VFP11_LS;
4923 }
4924 /* Single-register transfer. Note L==0. */
4925 else if ((insn & 0x0f100e10) == 0x0e000a10)
4926 {
4927 unsigned int opcode = (insn >> 21) & 7;
4928 unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7);
4929
4930 switch (opcode)
4931 {
4932 case 0: /* fmsr/fmdlr. */
4933 case 1: /* fmdhr. */
4934 /* Mark fmdhr and fmdlr as writing to the whole of the DP
4935 destination register. I don't know if this is exactly right,
4936 but it is the conservative choice. */
4937 bfd_arm_vfp11_write_mask (destmask, fn);
4938 break;
4939
4940 case 7: /* fmxr. */
4941 break;
4942 }
4943
4944 pipe = VFP11_LS;
4945 }
4946
4947 return pipe;
4948 }
4949
4950
4951 static int elf32_arm_compare_mapping (const void * a, const void * b);
4952
4953
4954 /* Look for potentially-troublesome code sequences which might trigger the
4955 VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet
4956 (available from ARM) for details of the erratum. A short version is
4957 described in ld.texinfo. */
4958
4959 bfd_boolean
4960 bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info)
4961 {
4962 asection *sec;
4963 bfd_byte *contents = NULL;
4964 int state = 0;
4965 int regs[3], numregs = 0;
4966 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
4967 int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR);
4968
4969 /* We use a simple FSM to match troublesome VFP11 instruction sequences.
4970 The states transition as follows:
4971
4972 0 -> 1 (vector) or 0 -> 2 (scalar)
4973 A VFP FMAC-pipeline instruction has been seen. Fill
4974 regs[0]..regs[numregs-1] with its input operands. Remember this
4975 instruction in 'first_fmac'.
4976
4977 1 -> 2
4978 Any instruction, except for a VFP instruction which overwrites
4979 regs[*].
4980
4981 1 -> 3 [ -> 0 ] or
4982 2 -> 3 [ -> 0 ]
4983 A VFP instruction has been seen which overwrites any of regs[*].
4984 We must make a veneer! Reset state to 0 before examining next
4985 instruction.
4986
4987 2 -> 0
4988 If we fail to match anything in state 2, reset to state 0 and reset
4989 the instruction pointer to the instruction after 'first_fmac'.
4990
4991 If the VFP11 vector mode is in use, there must be at least two unrelated
4992 instructions between anti-dependent VFP11 instructions to properly avoid
4993 triggering the erratum, hence the use of the extra state 1. */
4994
4995 /* If we are only performing a partial link do not bother
4996 to construct any glue. */
4997 if (link_info->relocatable)
4998 return TRUE;
4999
5000 /* Skip if this bfd does not correspond to an ELF image. */
5001 if (! is_arm_elf (abfd))
5002 return TRUE;
5003
5004 /* We should have chosen a fix type by the time we get here. */
5005 BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT);
5006
5007 if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE)
5008 return TRUE;
5009
5010 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5011 {
5012 unsigned int i, span, first_fmac = 0, veneer_of_insn = 0;
5013 struct _arm_elf_section_data *sec_data;
5014
5015 /* If we don't have executable progbits, we're not interested in this
5016 section. Also skip if section is to be excluded. */
5017 if (elf_section_type (sec) != SHT_PROGBITS
5018 || (elf_section_flags (sec) & SHF_EXECINSTR) == 0
5019 || (sec->flags & SEC_EXCLUDE) != 0
5020 || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0)
5021 continue;
5022
5023 sec_data = elf32_arm_section_data (sec);
5024
5025 if (sec_data->mapcount == 0)
5026 continue;
5027
5028 if (elf_section_data (sec)->this_hdr.contents != NULL)
5029 contents = elf_section_data (sec)->this_hdr.contents;
5030 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
5031 goto error_return;
5032
5033 qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map),
5034 elf32_arm_compare_mapping);
5035
5036 for (span = 0; span < sec_data->mapcount; span++)
5037 {
5038 unsigned int span_start = sec_data->map[span].vma;
5039 unsigned int span_end = (span == sec_data->mapcount - 1)
5040 ? sec->size : sec_data->map[span + 1].vma;
5041 char span_type = sec_data->map[span].type;
5042
5043 /* FIXME: Only ARM mode is supported at present. We may need to
5044 support Thumb-2 mode also at some point. */
5045 if (span_type != 'a')
5046 continue;
5047
5048 for (i = span_start; i < span_end;)
5049 {
5050 unsigned int next_i = i + 4;
5051 unsigned int insn = bfd_big_endian (abfd)
5052 ? (contents[i] << 24)
5053 | (contents[i + 1] << 16)
5054 | (contents[i + 2] << 8)
5055 | contents[i + 3]
5056 : (contents[i + 3] << 24)
5057 | (contents[i + 2] << 16)
5058 | (contents[i + 1] << 8)
5059 | contents[i];
5060 unsigned int writemask = 0;
5061 enum bfd_arm_vfp11_pipe pipe;
5062
5063 switch (state)
5064 {
5065 case 0:
5066 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs,
5067 &numregs);
5068 /* I'm assuming the VFP11 erratum can trigger with denorm
5069 operands on either the FMAC or the DS pipeline. This might
5070 lead to slightly overenthusiastic veneer insertion. */
5071 if (pipe == VFP11_FMAC || pipe == VFP11_DS)
5072 {
5073 state = use_vector ? 1 : 2;
5074 first_fmac = i;
5075 veneer_of_insn = insn;
5076 }
5077 break;
5078
5079 case 1:
5080 {
5081 int other_regs[3], other_numregs;
5082 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5083 other_regs,
5084 &other_numregs);
5085 if (pipe != VFP11_BAD
5086 && bfd_arm_vfp11_antidependency (writemask, regs,
5087 numregs))
5088 state = 3;
5089 else
5090 state = 2;
5091 }
5092 break;
5093
5094 case 2:
5095 {
5096 int other_regs[3], other_numregs;
5097 pipe = bfd_arm_vfp11_insn_decode (insn, &writemask,
5098 other_regs,
5099 &other_numregs);
5100 if (pipe != VFP11_BAD
5101 && bfd_arm_vfp11_antidependency (writemask, regs,
5102 numregs))
5103 state = 3;
5104 else
5105 {
5106 state = 0;
5107 next_i = first_fmac + 4;
5108 }
5109 }
5110 break;
5111
5112 case 3:
5113 abort (); /* Should be unreachable. */
5114 }
5115
5116 if (state == 3)
5117 {
5118 elf32_vfp11_erratum_list *newerr
5119 = bfd_zmalloc (sizeof (elf32_vfp11_erratum_list));
5120 int errcount;
5121
5122 errcount = ++(elf32_arm_section_data (sec)->erratumcount);
5123
5124 newerr->u.b.vfp_insn = veneer_of_insn;
5125
5126 switch (span_type)
5127 {
5128 case 'a':
5129 newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER;
5130 break;
5131
5132 default:
5133 abort ();
5134 }
5135
5136 record_vfp11_erratum_veneer (link_info, newerr, abfd, sec,
5137 first_fmac);
5138
5139 newerr->vma = -1;
5140
5141 newerr->next = sec_data->erratumlist;
5142 sec_data->erratumlist = newerr;
5143
5144 state = 0;
5145 }
5146
5147 i = next_i;
5148 }
5149 }
5150
5151 if (contents != NULL
5152 && elf_section_data (sec)->this_hdr.contents != contents)
5153 free (contents);
5154 contents = NULL;
5155 }
5156
5157 return TRUE;
5158
5159 error_return:
5160 if (contents != NULL
5161 && elf_section_data (sec)->this_hdr.contents != contents)
5162 free (contents);
5163
5164 return FALSE;
5165 }
5166
5167 /* Find virtual-memory addresses for VFP11 erratum veneers and return locations
5168 after sections have been laid out, using specially-named symbols. */
5169
5170 void
5171 bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd,
5172 struct bfd_link_info *link_info)
5173 {
5174 asection *sec;
5175 struct elf32_arm_link_hash_table *globals;
5176 char *tmp_name;
5177
5178 if (link_info->relocatable)
5179 return;
5180
5181 /* Skip if this bfd does not correspond to an ELF image. */
5182 if (! is_arm_elf (abfd))
5183 return;
5184
5185 globals = elf32_arm_hash_table (link_info);
5186
5187 tmp_name = bfd_malloc ((bfd_size_type) strlen
5188 (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10);
5189
5190 for (sec = abfd->sections; sec != NULL; sec = sec->next)
5191 {
5192 struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec);
5193 elf32_vfp11_erratum_list *errnode = sec_data->erratumlist;
5194
5195 for (; errnode != NULL; errnode = errnode->next)
5196 {
5197 struct elf_link_hash_entry *myh;
5198 bfd_vma vma;
5199
5200 switch (errnode->type)
5201 {
5202 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
5203 case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER:
5204 /* Find veneer symbol. */
5205 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME,
5206 errnode->u.b.veneer->u.v.id);
5207
5208 myh = elf_link_hash_lookup
5209 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5210
5211 if (myh == NULL)
5212 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5213 "`%s'"), abfd, tmp_name);
5214
5215 vma = myh->root.u.def.section->output_section->vma
5216 + myh->root.u.def.section->output_offset
5217 + myh->root.u.def.value;
5218
5219 errnode->u.b.veneer->vma = vma;
5220 break;
5221
5222 case VFP11_ERRATUM_ARM_VENEER:
5223 case VFP11_ERRATUM_THUMB_VENEER:
5224 /* Find return location. */
5225 sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r",
5226 errnode->u.v.id);
5227
5228 myh = elf_link_hash_lookup
5229 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
5230
5231 if (myh == NULL)
5232 (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer "
5233 "`%s'"), abfd, tmp_name);
5234
5235 vma = myh->root.u.def.section->output_section->vma
5236 + myh->root.u.def.section->output_offset
5237 + myh->root.u.def.value;
5238
5239 errnode->u.v.branch->vma = vma;
5240 break;
5241
5242 default:
5243 abort ();
5244 }
5245 }
5246 }
5247
5248 free (tmp_name);
5249 }
5250
5251
5252 /* Set target relocation values needed during linking. */
5253
5254 void
5255 bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
5256 struct bfd_link_info *link_info,
5257 int target1_is_rel,
5258 char * target2_type,
5259 int fix_v4bx,
5260 int use_blx,
5261 bfd_arm_vfp11_fix vfp11_fix,
5262 int no_enum_warn, int no_wchar_warn,
5263 int pic_veneer)
5264 {
5265 struct elf32_arm_link_hash_table *globals;
5266
5267 globals = elf32_arm_hash_table (link_info);
5268
5269 globals->target1_is_rel = target1_is_rel;
5270 if (strcmp (target2_type, "rel") == 0)
5271 globals->target2_reloc = R_ARM_REL32;
5272 else if (strcmp (target2_type, "abs") == 0)
5273 globals->target2_reloc = R_ARM_ABS32;
5274 else if (strcmp (target2_type, "got-rel") == 0)
5275 globals->target2_reloc = R_ARM_GOT_PREL;
5276 else
5277 {
5278 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
5279 target2_type);
5280 }
5281 globals->fix_v4bx = fix_v4bx;
5282 globals->use_blx |= use_blx;
5283 globals->vfp11_fix = vfp11_fix;
5284 globals->pic_veneer = pic_veneer;
5285
5286 BFD_ASSERT (is_arm_elf (output_bfd));
5287 elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
5288 elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
5289 }
5290
5291 /* Replace the target offset of a Thumb bl or b.w instruction. */
5292
5293 static void
5294 insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn)
5295 {
5296 bfd_vma upper;
5297 bfd_vma lower;
5298 int reloc_sign;
5299
5300 BFD_ASSERT ((offset & 1) == 0);
5301
5302 upper = bfd_get_16 (abfd, insn);
5303 lower = bfd_get_16 (abfd, insn + 2);
5304 reloc_sign = (offset < 0) ? 1 : 0;
5305 upper = (upper & ~(bfd_vma) 0x7ff)
5306 | ((offset >> 12) & 0x3ff)
5307 | (reloc_sign << 10);
5308 lower = (lower & ~(bfd_vma) 0x2fff)
5309 | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13)
5310 | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11)
5311 | ((offset >> 1) & 0x7ff);
5312 bfd_put_16 (abfd, upper, insn);
5313 bfd_put_16 (abfd, lower, insn + 2);
5314 }
5315
5316 /* Thumb code calling an ARM function. */
5317
5318 static int
5319 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
5320 const char * name,
5321 bfd * input_bfd,
5322 bfd * output_bfd,
5323 asection * input_section,
5324 bfd_byte * hit_data,
5325 asection * sym_sec,
5326 bfd_vma offset,
5327 bfd_signed_vma addend,
5328 bfd_vma val,
5329 char **error_message)
5330 {
5331 asection * s = 0;
5332 bfd_vma my_offset;
5333 long int ret_offset;
5334 struct elf_link_hash_entry * myh;
5335 struct elf32_arm_link_hash_table * globals;
5336
5337 myh = find_thumb_glue (info, name, error_message);
5338 if (myh == NULL)
5339 return FALSE;
5340
5341 globals = elf32_arm_hash_table (info);
5342
5343 BFD_ASSERT (globals != NULL);
5344 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5345
5346 my_offset = myh->root.u.def.value;
5347
5348 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5349 THUMB2ARM_GLUE_SECTION_NAME);
5350
5351 BFD_ASSERT (s != NULL);
5352 BFD_ASSERT (s->contents != NULL);
5353 BFD_ASSERT (s->output_section != NULL);
5354
5355 if ((my_offset & 0x01) == 0x01)
5356 {
5357 if (sym_sec != NULL
5358 && sym_sec->owner != NULL
5359 && !INTERWORK_FLAG (sym_sec->owner))
5360 {
5361 (*_bfd_error_handler)
5362 (_("%B(%s): warning: interworking not enabled.\n"
5363 " first occurrence: %B: thumb call to arm"),
5364 sym_sec->owner, input_bfd, name);
5365
5366 return FALSE;
5367 }
5368
5369 --my_offset;
5370 myh->root.u.def.value = my_offset;
5371
5372 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
5373 s->contents + my_offset);
5374
5375 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
5376 s->contents + my_offset + 2);
5377
5378 ret_offset =
5379 /* Address of destination of the stub. */
5380 ((bfd_signed_vma) val)
5381 - ((bfd_signed_vma)
5382 /* Offset from the start of the current section
5383 to the start of the stubs. */
5384 (s->output_offset
5385 /* Offset of the start of this stub from the start of the stubs. */
5386 + my_offset
5387 /* Address of the start of the current section. */
5388 + s->output_section->vma)
5389 /* The branch instruction is 4 bytes into the stub. */
5390 + 4
5391 /* ARM branches work from the pc of the instruction + 8. */
5392 + 8);
5393
5394 put_arm_insn (globals, output_bfd,
5395 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
5396 s->contents + my_offset + 4);
5397 }
5398
5399 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
5400
5401 /* Now go back and fix up the original BL insn to point to here. */
5402 ret_offset =
5403 /* Address of where the stub is located. */
5404 (s->output_section->vma + s->output_offset + my_offset)
5405 /* Address of where the BL is located. */
5406 - (input_section->output_section->vma + input_section->output_offset
5407 + offset)
5408 /* Addend in the relocation. */
5409 - addend
5410 /* Biassing for PC-relative addressing. */
5411 - 8;
5412
5413 insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma);
5414
5415 return TRUE;
5416 }
5417
5418 /* Populate an Arm to Thumb stub. Returns the stub symbol. */
5419
5420 static struct elf_link_hash_entry *
5421 elf32_arm_create_thumb_stub (struct bfd_link_info * info,
5422 const char * name,
5423 bfd * input_bfd,
5424 bfd * output_bfd,
5425 asection * sym_sec,
5426 bfd_vma val,
5427 asection * s,
5428 char ** error_message)
5429 {
5430 bfd_vma my_offset;
5431 long int ret_offset;
5432 struct elf_link_hash_entry * myh;
5433 struct elf32_arm_link_hash_table * globals;
5434
5435 myh = find_arm_glue (info, name, error_message);
5436 if (myh == NULL)
5437 return NULL;
5438
5439 globals = elf32_arm_hash_table (info);
5440
5441 BFD_ASSERT (globals != NULL);
5442 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5443
5444 my_offset = myh->root.u.def.value;
5445
5446 if ((my_offset & 0x01) == 0x01)
5447 {
5448 if (sym_sec != NULL
5449 && sym_sec->owner != NULL
5450 && !INTERWORK_FLAG (sym_sec->owner))
5451 {
5452 (*_bfd_error_handler)
5453 (_("%B(%s): warning: interworking not enabled.\n"
5454 " first occurrence: %B: arm call to thumb"),
5455 sym_sec->owner, input_bfd, name);
5456 }
5457
5458 --my_offset;
5459 myh->root.u.def.value = my_offset;
5460
5461 if (info->shared || globals->root.is_relocatable_executable
5462 || globals->pic_veneer)
5463 {
5464 /* For relocatable objects we can't use absolute addresses,
5465 so construct the address from a relative offset. */
5466 /* TODO: If the offset is small it's probably worth
5467 constructing the address with adds. */
5468 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
5469 s->contents + my_offset);
5470 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
5471 s->contents + my_offset + 4);
5472 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
5473 s->contents + my_offset + 8);
5474 /* Adjust the offset by 4 for the position of the add,
5475 and 8 for the pipeline offset. */
5476 ret_offset = (val - (s->output_offset
5477 + s->output_section->vma
5478 + my_offset + 12))
5479 | 1;
5480 bfd_put_32 (output_bfd, ret_offset,
5481 s->contents + my_offset + 12);
5482 }
5483 else if (globals->use_blx)
5484 {
5485 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn,
5486 s->contents + my_offset);
5487
5488 /* It's a thumb address. Add the low order bit. */
5489 bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn,
5490 s->contents + my_offset + 4);
5491 }
5492 else
5493 {
5494 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
5495 s->contents + my_offset);
5496
5497 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
5498 s->contents + my_offset + 4);
5499
5500 /* It's a thumb address. Add the low order bit. */
5501 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
5502 s->contents + my_offset + 8);
5503
5504 my_offset += 12;
5505 }
5506 }
5507
5508 BFD_ASSERT (my_offset <= globals->arm_glue_size);
5509
5510 return myh;
5511 }
5512
5513 /* Arm code calling a Thumb function. */
5514
5515 static int
5516 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
5517 const char * name,
5518 bfd * input_bfd,
5519 bfd * output_bfd,
5520 asection * input_section,
5521 bfd_byte * hit_data,
5522 asection * sym_sec,
5523 bfd_vma offset,
5524 bfd_signed_vma addend,
5525 bfd_vma val,
5526 char **error_message)
5527 {
5528 unsigned long int tmp;
5529 bfd_vma my_offset;
5530 asection * s;
5531 long int ret_offset;
5532 struct elf_link_hash_entry * myh;
5533 struct elf32_arm_link_hash_table * globals;
5534
5535 globals = elf32_arm_hash_table (info);
5536
5537 BFD_ASSERT (globals != NULL);
5538 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5539
5540 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5541 ARM2THUMB_GLUE_SECTION_NAME);
5542 BFD_ASSERT (s != NULL);
5543 BFD_ASSERT (s->contents != NULL);
5544 BFD_ASSERT (s->output_section != NULL);
5545
5546 myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd,
5547 sym_sec, val, s, error_message);
5548 if (!myh)
5549 return FALSE;
5550
5551 my_offset = myh->root.u.def.value;
5552 tmp = bfd_get_32 (input_bfd, hit_data);
5553 tmp = tmp & 0xFF000000;
5554
5555 /* Somehow these are both 4 too far, so subtract 8. */
5556 ret_offset = (s->output_offset
5557 + my_offset
5558 + s->output_section->vma
5559 - (input_section->output_offset
5560 + input_section->output_section->vma
5561 + offset + addend)
5562 - 8);
5563
5564 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
5565
5566 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
5567
5568 return TRUE;
5569 }
5570
5571 /* Populate Arm stub for an exported Thumb function. */
5572
5573 static bfd_boolean
5574 elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf)
5575 {
5576 struct bfd_link_info * info = (struct bfd_link_info *) inf;
5577 asection * s;
5578 struct elf_link_hash_entry * myh;
5579 struct elf32_arm_link_hash_entry *eh;
5580 struct elf32_arm_link_hash_table * globals;
5581 asection *sec;
5582 bfd_vma val;
5583 char *error_message;
5584
5585 eh = elf32_arm_hash_entry (h);
5586 /* Allocate stubs for exported Thumb functions on v4t. */
5587 if (eh->export_glue == NULL)
5588 return TRUE;
5589
5590 globals = elf32_arm_hash_table (info);
5591
5592 BFD_ASSERT (globals != NULL);
5593 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5594
5595 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5596 ARM2THUMB_GLUE_SECTION_NAME);
5597 BFD_ASSERT (s != NULL);
5598 BFD_ASSERT (s->contents != NULL);
5599 BFD_ASSERT (s->output_section != NULL);
5600
5601 sec = eh->export_glue->root.u.def.section;
5602
5603 BFD_ASSERT (sec->output_section != NULL);
5604
5605 val = eh->export_glue->root.u.def.value + sec->output_offset
5606 + sec->output_section->vma;
5607
5608 myh = elf32_arm_create_thumb_stub (info, h->root.root.string,
5609 h->root.u.def.section->owner,
5610 globals->obfd, sec, val, s,
5611 &error_message);
5612 BFD_ASSERT (myh);
5613 return TRUE;
5614 }
5615
5616 /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */
5617
5618 static bfd_vma
5619 elf32_arm_bx_glue (struct bfd_link_info * info, int reg)
5620 {
5621 bfd_byte *p;
5622 bfd_vma glue_addr;
5623 asection *s;
5624 struct elf32_arm_link_hash_table *globals;
5625
5626 globals = elf32_arm_hash_table (info);
5627
5628 BFD_ASSERT (globals != NULL);
5629 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
5630
5631 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
5632 ARM_BX_GLUE_SECTION_NAME);
5633 BFD_ASSERT (s != NULL);
5634 BFD_ASSERT (s->contents != NULL);
5635 BFD_ASSERT (s->output_section != NULL);
5636
5637 BFD_ASSERT (globals->bx_glue_offset[reg] & 2);
5638
5639 glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3;
5640
5641 if ((globals->bx_glue_offset[reg] & 1) == 0)
5642 {
5643 p = s->contents + glue_addr;
5644 bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p);
5645 bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4);
5646 bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8);
5647 globals->bx_glue_offset[reg] |= 1;
5648 }
5649
5650 return glue_addr + s->output_section->vma + s->output_offset;
5651 }
5652
5653 /* Generate Arm stubs for exported Thumb symbols. */
5654 static void
5655 elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED,
5656 struct bfd_link_info *link_info)
5657 {
5658 struct elf32_arm_link_hash_table * globals;
5659
5660 if (link_info == NULL)
5661 /* Ignore this if we are not called by the ELF backend linker. */
5662 return;
5663
5664 globals = elf32_arm_hash_table (link_info);
5665 /* If blx is available then exported Thumb symbols are OK and there is
5666 nothing to do. */
5667 if (globals->use_blx)
5668 return;
5669
5670 elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub,
5671 link_info);
5672 }
5673
5674 /* Some relocations map to different relocations depending on the
5675 target. Return the real relocation. */
5676
5677 static int
5678 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
5679 int r_type)
5680 {
5681 switch (r_type)
5682 {
5683 case R_ARM_TARGET1:
5684 if (globals->target1_is_rel)
5685 return R_ARM_REL32;
5686 else
5687 return R_ARM_ABS32;
5688
5689 case R_ARM_TARGET2:
5690 return globals->target2_reloc;
5691
5692 default:
5693 return r_type;
5694 }
5695 }
5696
5697 /* Return the base VMA address which should be subtracted from real addresses
5698 when resolving @dtpoff relocation.
5699 This is PT_TLS segment p_vaddr. */
5700
5701 static bfd_vma
5702 dtpoff_base (struct bfd_link_info *info)
5703 {
5704 /* If tls_sec is NULL, we should have signalled an error already. */
5705 if (elf_hash_table (info)->tls_sec == NULL)
5706 return 0;
5707 return elf_hash_table (info)->tls_sec->vma;
5708 }
5709
5710 /* Return the relocation value for @tpoff relocation
5711 if STT_TLS virtual address is ADDRESS. */
5712
5713 static bfd_vma
5714 tpoff (struct bfd_link_info *info, bfd_vma address)
5715 {
5716 struct elf_link_hash_table *htab = elf_hash_table (info);
5717 bfd_vma base;
5718
5719 /* If tls_sec is NULL, we should have signalled an error already. */
5720 if (htab->tls_sec == NULL)
5721 return 0;
5722 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
5723 return address - htab->tls_sec->vma + base;
5724 }
5725
5726 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
5727 VALUE is the relocation value. */
5728
5729 static bfd_reloc_status_type
5730 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
5731 {
5732 if (value > 0xfff)
5733 return bfd_reloc_overflow;
5734
5735 value |= bfd_get_32 (abfd, data) & 0xfffff000;
5736 bfd_put_32 (abfd, value, data);
5737 return bfd_reloc_ok;
5738 }
5739
5740 /* For a given value of n, calculate the value of G_n as required to
5741 deal with group relocations. We return it in the form of an
5742 encoded constant-and-rotation, together with the final residual. If n is
5743 specified as less than zero, then final_residual is filled with the
5744 input value and no further action is performed. */
5745
5746 static bfd_vma
5747 calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual)
5748 {
5749 int current_n;
5750 bfd_vma g_n;
5751 bfd_vma encoded_g_n = 0;
5752 bfd_vma residual = value; /* Also known as Y_n. */
5753
5754 for (current_n = 0; current_n <= n; current_n++)
5755 {
5756 int shift;
5757
5758 /* Calculate which part of the value to mask. */
5759 if (residual == 0)
5760 shift = 0;
5761 else
5762 {
5763 int msb;
5764
5765 /* Determine the most significant bit in the residual and
5766 align the resulting value to a 2-bit boundary. */
5767 for (msb = 30; msb >= 0; msb -= 2)
5768 if (residual & (3 << msb))
5769 break;
5770
5771 /* The desired shift is now (msb - 6), or zero, whichever
5772 is the greater. */
5773 shift = msb - 6;
5774 if (shift < 0)
5775 shift = 0;
5776 }
5777
5778 /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */
5779 g_n = residual & (0xff << shift);
5780 encoded_g_n = (g_n >> shift)
5781 | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8);
5782
5783 /* Calculate the residual for the next time around. */
5784 residual &= ~g_n;
5785 }
5786
5787 *final_residual = residual;
5788
5789 return encoded_g_n;
5790 }
5791
5792 /* Given an ARM instruction, determine whether it is an ADD or a SUB.
5793 Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */
5794
5795 static int
5796 identify_add_or_sub (bfd_vma insn)
5797 {
5798 int opcode = insn & 0x1e00000;
5799
5800 if (opcode == 1 << 23) /* ADD */
5801 return 1;
5802
5803 if (opcode == 1 << 22) /* SUB */
5804 return -1;
5805
5806 return 0;
5807 }
5808
5809 /* Perform a relocation as part of a final link. */
5810
5811 static bfd_reloc_status_type
5812 elf32_arm_final_link_relocate (reloc_howto_type * howto,
5813 bfd * input_bfd,
5814 bfd * output_bfd,
5815 asection * input_section,
5816 bfd_byte * contents,
5817 Elf_Internal_Rela * rel,
5818 bfd_vma value,
5819 struct bfd_link_info * info,
5820 asection * sym_sec,
5821 const char * sym_name,
5822 int sym_flags,
5823 struct elf_link_hash_entry * h,
5824 bfd_boolean * unresolved_reloc_p,
5825 char ** error_message)
5826 {
5827 unsigned long r_type = howto->type;
5828 unsigned long r_symndx;
5829 bfd_byte * hit_data = contents + rel->r_offset;
5830 bfd * dynobj = NULL;
5831 Elf_Internal_Shdr * symtab_hdr;
5832 struct elf_link_hash_entry ** sym_hashes;
5833 bfd_vma * local_got_offsets;
5834 asection * sgot = NULL;
5835 asection * splt = NULL;
5836 asection * sreloc = NULL;
5837 bfd_vma addend;
5838 bfd_signed_vma signed_addend;
5839 struct elf32_arm_link_hash_table * globals;
5840
5841 globals = elf32_arm_hash_table (info);
5842
5843 BFD_ASSERT (is_arm_elf (input_bfd));
5844
5845 /* Some relocation types map to different relocations depending on the
5846 target. We pick the right one here. */
5847 r_type = arm_real_reloc_type (globals, r_type);
5848 if (r_type != howto->type)
5849 howto = elf32_arm_howto_from_type (r_type);
5850
5851 /* If the start address has been set, then set the EF_ARM_HASENTRY
5852 flag. Setting this more than once is redundant, but the cost is
5853 not too high, and it keeps the code simple.
5854
5855 The test is done here, rather than somewhere else, because the
5856 start address is only set just before the final link commences.
5857
5858 Note - if the user deliberately sets a start address of 0, the
5859 flag will not be set. */
5860 if (bfd_get_start_address (output_bfd) != 0)
5861 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
5862
5863 dynobj = elf_hash_table (info)->dynobj;
5864 if (dynobj)
5865 {
5866 sgot = bfd_get_section_by_name (dynobj, ".got");
5867 splt = bfd_get_section_by_name (dynobj, ".plt");
5868 }
5869 symtab_hdr = & elf_symtab_hdr (input_bfd);
5870 sym_hashes = elf_sym_hashes (input_bfd);
5871 local_got_offsets = elf_local_got_offsets (input_bfd);
5872 r_symndx = ELF32_R_SYM (rel->r_info);
5873
5874 if (globals->use_rel)
5875 {
5876 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
5877
5878 if (addend & ((howto->src_mask + 1) >> 1))
5879 {
5880 signed_addend = -1;
5881 signed_addend &= ~ howto->src_mask;
5882 signed_addend |= addend;
5883 }
5884 else
5885 signed_addend = addend;
5886 }
5887 else
5888 addend = signed_addend = rel->r_addend;
5889
5890 switch (r_type)
5891 {
5892 case R_ARM_NONE:
5893 /* We don't need to find a value for this symbol. It's just a
5894 marker. */
5895 *unresolved_reloc_p = FALSE;
5896 return bfd_reloc_ok;
5897
5898 case R_ARM_ABS12:
5899 if (!globals->vxworks_p)
5900 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
5901
5902 case R_ARM_PC24:
5903 case R_ARM_ABS32:
5904 case R_ARM_ABS32_NOI:
5905 case R_ARM_REL32:
5906 case R_ARM_REL32_NOI:
5907 case R_ARM_CALL:
5908 case R_ARM_JUMP24:
5909 case R_ARM_XPC25:
5910 case R_ARM_PREL31:
5911 case R_ARM_PLT32:
5912 /* Handle relocations which should use the PLT entry. ABS32/REL32
5913 will use the symbol's value, which may point to a PLT entry, but we
5914 don't need to handle that here. If we created a PLT entry, all
5915 branches in this object should go to it. */
5916 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
5917 && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI)
5918 && h != NULL
5919 && splt != NULL
5920 && h->plt.offset != (bfd_vma) -1)
5921 {
5922 /* If we've created a .plt section, and assigned a PLT entry to
5923 this function, it should not be known to bind locally. If
5924 it were, we would have cleared the PLT entry. */
5925 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
5926
5927 value = (splt->output_section->vma
5928 + splt->output_offset
5929 + h->plt.offset);
5930 *unresolved_reloc_p = FALSE;
5931 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5932 contents, rel->r_offset, value,
5933 rel->r_addend);
5934 }
5935
5936 /* When generating a shared object or relocatable executable, these
5937 relocations are copied into the output file to be resolved at
5938 run time. */
5939 if ((info->shared || globals->root.is_relocatable_executable)
5940 && (input_section->flags & SEC_ALLOC)
5941 && !(elf32_arm_hash_table (info)->vxworks_p
5942 && strcmp (input_section->output_section->name,
5943 ".tls_vars") == 0)
5944 && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI)
5945 || !SYMBOL_CALLS_LOCAL (info, h))
5946 && (h == NULL
5947 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5948 || h->root.type != bfd_link_hash_undefweak)
5949 && r_type != R_ARM_PC24
5950 && r_type != R_ARM_CALL
5951 && r_type != R_ARM_JUMP24
5952 && r_type != R_ARM_PREL31
5953 && r_type != R_ARM_PLT32)
5954 {
5955 Elf_Internal_Rela outrel;
5956 bfd_byte *loc;
5957 bfd_boolean skip, relocate;
5958
5959 *unresolved_reloc_p = FALSE;
5960
5961 if (sreloc == NULL)
5962 {
5963 const char * name;
5964
5965 name = (bfd_elf_string_from_elf_section
5966 (input_bfd,
5967 elf_elfheader (input_bfd)->e_shstrndx,
5968 elf_section_data (input_section)->rel_hdr.sh_name));
5969 if (name == NULL)
5970 return bfd_reloc_notsupported;
5971
5972 BFD_ASSERT (reloc_section_p (globals, name, input_section));
5973
5974 sreloc = bfd_get_section_by_name (dynobj, name);
5975 BFD_ASSERT (sreloc != NULL);
5976 }
5977
5978 skip = FALSE;
5979 relocate = FALSE;
5980
5981 outrel.r_addend = addend;
5982 outrel.r_offset =
5983 _bfd_elf_section_offset (output_bfd, info, input_section,
5984 rel->r_offset);
5985 if (outrel.r_offset == (bfd_vma) -1)
5986 skip = TRUE;
5987 else if (outrel.r_offset == (bfd_vma) -2)
5988 skip = TRUE, relocate = TRUE;
5989 outrel.r_offset += (input_section->output_section->vma
5990 + input_section->output_offset);
5991
5992 if (skip)
5993 memset (&outrel, 0, sizeof outrel);
5994 else if (h != NULL
5995 && h->dynindx != -1
5996 && (!info->shared
5997 || !info->symbolic
5998 || !h->def_regular))
5999 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6000 else
6001 {
6002 int symbol;
6003
6004 /* This symbol is local, or marked to become local. */
6005 if (sym_flags == STT_ARM_TFUNC)
6006 value |= 1;
6007 if (globals->symbian_p)
6008 {
6009 asection *osec;
6010
6011 /* On Symbian OS, the data segment and text segement
6012 can be relocated independently. Therefore, we
6013 must indicate the segment to which this
6014 relocation is relative. The BPABI allows us to
6015 use any symbol in the right segment; we just use
6016 the section symbol as it is convenient. (We
6017 cannot use the symbol given by "h" directly as it
6018 will not appear in the dynamic symbol table.)
6019
6020 Note that the dynamic linker ignores the section
6021 symbol value, so we don't subtract osec->vma
6022 from the emitted reloc addend. */
6023 if (sym_sec)
6024 osec = sym_sec->output_section;
6025 else
6026 osec = input_section->output_section;
6027 symbol = elf_section_data (osec)->dynindx;
6028 if (symbol == 0)
6029 {
6030 struct elf_link_hash_table *htab = elf_hash_table (info);
6031
6032 if ((osec->flags & SEC_READONLY) == 0
6033 && htab->data_index_section != NULL)
6034 osec = htab->data_index_section;
6035 else
6036 osec = htab->text_index_section;
6037 symbol = elf_section_data (osec)->dynindx;
6038 }
6039 BFD_ASSERT (symbol != 0);
6040 }
6041 else
6042 /* On SVR4-ish systems, the dynamic loader cannot
6043 relocate the text and data segments independently,
6044 so the symbol does not matter. */
6045 symbol = 0;
6046 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
6047 if (globals->use_rel)
6048 relocate = TRUE;
6049 else
6050 outrel.r_addend += value;
6051 }
6052
6053 loc = sreloc->contents;
6054 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
6055 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6056
6057 /* If this reloc is against an external symbol, we do not want to
6058 fiddle with the addend. Otherwise, we need to include the symbol
6059 value so that it becomes an addend for the dynamic reloc. */
6060 if (! relocate)
6061 return bfd_reloc_ok;
6062
6063 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6064 contents, rel->r_offset, value,
6065 (bfd_vma) 0);
6066 }
6067 else switch (r_type)
6068 {
6069 case R_ARM_ABS12:
6070 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
6071
6072 case R_ARM_XPC25: /* Arm BLX instruction. */
6073 case R_ARM_CALL:
6074 case R_ARM_JUMP24:
6075 case R_ARM_PC24: /* Arm B/BL instruction. */
6076 case R_ARM_PLT32:
6077 {
6078 bfd_vma from;
6079 bfd_signed_vma branch_offset;
6080 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6081
6082 from = (input_section->output_section->vma
6083 + input_section->output_offset
6084 + rel->r_offset);
6085 branch_offset = (bfd_signed_vma)(value - from);
6086
6087 if (r_type == R_ARM_XPC25)
6088 {
6089 /* Check for Arm calling Arm function. */
6090 /* FIXME: Should we translate the instruction into a BL
6091 instruction instead ? */
6092 if (sym_flags != STT_ARM_TFUNC)
6093 (*_bfd_error_handler)
6094 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
6095 input_bfd,
6096 h ? h->root.root.string : "(local)");
6097 }
6098 else if (r_type != R_ARM_CALL)
6099 {
6100 /* Check for Arm calling Thumb function. */
6101 if (sym_flags == STT_ARM_TFUNC)
6102 {
6103 if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
6104 output_bfd, input_section,
6105 hit_data, sym_sec, rel->r_offset,
6106 signed_addend, value,
6107 error_message))
6108 return bfd_reloc_ok;
6109 else
6110 return bfd_reloc_dangerous;
6111 }
6112 }
6113
6114 /* Check if a stub has to be inserted because the
6115 destination is too far or we are changing mode. */
6116 if (r_type == R_ARM_CALL)
6117 {
6118 if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET
6119 || branch_offset < ARM_MAX_BWD_BRANCH_OFFSET
6120 || sym_flags == STT_ARM_TFUNC)
6121 {
6122 /* The target is out of reach, so redirect the
6123 branch to the local stub for this function. */
6124
6125 stub_entry = elf32_arm_get_stub_entry (input_section,
6126 sym_sec, h,
6127 rel, globals);
6128 if (stub_entry != NULL)
6129 value = (stub_entry->stub_offset
6130 + stub_entry->stub_sec->output_offset
6131 + stub_entry->stub_sec->output_section->vma);
6132 }
6133 }
6134
6135 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
6136 where:
6137 S is the address of the symbol in the relocation.
6138 P is address of the instruction being relocated.
6139 A is the addend (extracted from the instruction) in bytes.
6140
6141 S is held in 'value'.
6142 P is the base address of the section containing the
6143 instruction plus the offset of the reloc into that
6144 section, ie:
6145 (input_section->output_section->vma +
6146 input_section->output_offset +
6147 rel->r_offset).
6148 A is the addend, converted into bytes, ie:
6149 (signed_addend * 4)
6150
6151 Note: None of these operations have knowledge of the pipeline
6152 size of the processor, thus it is up to the assembler to
6153 encode this information into the addend. */
6154 value -= (input_section->output_section->vma
6155 + input_section->output_offset);
6156 value -= rel->r_offset;
6157 if (globals->use_rel)
6158 value += (signed_addend << howto->size);
6159 else
6160 /* RELA addends do not have to be adjusted by howto->size. */
6161 value += signed_addend;
6162
6163 signed_addend = value;
6164 signed_addend >>= howto->rightshift;
6165
6166 /* A branch to an undefined weak symbol is turned into a jump to
6167 the next instruction. */
6168 if (h && h->root.type == bfd_link_hash_undefweak)
6169 {
6170 value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000)
6171 | 0x0affffff;
6172 }
6173 else
6174 {
6175 /* Perform a signed range check. */
6176 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
6177 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
6178 return bfd_reloc_overflow;
6179
6180 addend = (value & 2);
6181
6182 value = (signed_addend & howto->dst_mask)
6183 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
6184
6185 /* Set the H bit in the BLX instruction. */
6186 if (sym_flags == STT_ARM_TFUNC)
6187 {
6188 if (addend)
6189 value |= (1 << 24);
6190 else
6191 value &= ~(bfd_vma)(1 << 24);
6192 }
6193 if (r_type == R_ARM_CALL)
6194 {
6195 /* Select the correct instruction (BL or BLX). */
6196 /* Only if we are not handling a BL to a stub. In this
6197 case, mode switching is performed by the stub. */
6198 if (sym_flags == STT_ARM_TFUNC && !stub_entry)
6199 value |= (1 << 28);
6200 else
6201 {
6202 value &= ~(bfd_vma)(1 << 28);
6203 value |= (1 << 24);
6204 }
6205 }
6206 }
6207 }
6208 break;
6209
6210 case R_ARM_ABS32:
6211 value += addend;
6212 if (sym_flags == STT_ARM_TFUNC)
6213 value |= 1;
6214 break;
6215
6216 case R_ARM_ABS32_NOI:
6217 value += addend;
6218 break;
6219
6220 case R_ARM_REL32:
6221 value += addend;
6222 if (sym_flags == STT_ARM_TFUNC)
6223 value |= 1;
6224 value -= (input_section->output_section->vma
6225 + input_section->output_offset + rel->r_offset);
6226 break;
6227
6228 case R_ARM_REL32_NOI:
6229 value += addend;
6230 value -= (input_section->output_section->vma
6231 + input_section->output_offset + rel->r_offset);
6232 break;
6233
6234 case R_ARM_PREL31:
6235 value -= (input_section->output_section->vma
6236 + input_section->output_offset + rel->r_offset);
6237 value += signed_addend;
6238 if (! h || h->root.type != bfd_link_hash_undefweak)
6239 {
6240 /* Check for overflow. */
6241 if ((value ^ (value >> 1)) & (1 << 30))
6242 return bfd_reloc_overflow;
6243 }
6244 value &= 0x7fffffff;
6245 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
6246 if (sym_flags == STT_ARM_TFUNC)
6247 value |= 1;
6248 break;
6249 }
6250
6251 bfd_put_32 (input_bfd, value, hit_data);
6252 return bfd_reloc_ok;
6253
6254 case R_ARM_ABS8:
6255 value += addend;
6256 if ((long) value > 0x7f || (long) value < -0x80)
6257 return bfd_reloc_overflow;
6258
6259 bfd_put_8 (input_bfd, value, hit_data);
6260 return bfd_reloc_ok;
6261
6262 case R_ARM_ABS16:
6263 value += addend;
6264
6265 if ((long) value > 0x7fff || (long) value < -0x8000)
6266 return bfd_reloc_overflow;
6267
6268 bfd_put_16 (input_bfd, value, hit_data);
6269 return bfd_reloc_ok;
6270
6271 case R_ARM_THM_ABS5:
6272 /* Support ldr and str instructions for the thumb. */
6273 if (globals->use_rel)
6274 {
6275 /* Need to refetch addend. */
6276 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6277 /* ??? Need to determine shift amount from operand size. */
6278 addend >>= howto->rightshift;
6279 }
6280 value += addend;
6281
6282 /* ??? Isn't value unsigned? */
6283 if ((long) value > 0x1f || (long) value < -0x10)
6284 return bfd_reloc_overflow;
6285
6286 /* ??? Value needs to be properly shifted into place first. */
6287 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
6288 bfd_put_16 (input_bfd, value, hit_data);
6289 return bfd_reloc_ok;
6290
6291 case R_ARM_THM_ALU_PREL_11_0:
6292 /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */
6293 {
6294 bfd_vma insn;
6295 bfd_signed_vma relocation;
6296
6297 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6298 | bfd_get_16 (input_bfd, hit_data + 2);
6299
6300 if (globals->use_rel)
6301 {
6302 signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4)
6303 | ((insn & (1 << 26)) >> 15);
6304 if (insn & 0xf00000)
6305 signed_addend = -signed_addend;
6306 }
6307
6308 relocation = value + signed_addend;
6309 relocation -= (input_section->output_section->vma
6310 + input_section->output_offset
6311 + rel->r_offset);
6312
6313 value = abs (relocation);
6314
6315 if (value >= 0x1000)
6316 return bfd_reloc_overflow;
6317
6318 insn = (insn & 0xfb0f8f00) | (value & 0xff)
6319 | ((value & 0x700) << 4)
6320 | ((value & 0x800) << 15);
6321 if (relocation < 0)
6322 insn |= 0xa00000;
6323
6324 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6325 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6326
6327 return bfd_reloc_ok;
6328 }
6329
6330 case R_ARM_THM_PC12:
6331 /* Corresponds to: ldr.w reg, [pc, #offset]. */
6332 {
6333 bfd_vma insn;
6334 bfd_signed_vma relocation;
6335
6336 insn = (bfd_get_16 (input_bfd, hit_data) << 16)
6337 | bfd_get_16 (input_bfd, hit_data + 2);
6338
6339 if (globals->use_rel)
6340 {
6341 signed_addend = insn & 0xfff;
6342 if (!(insn & (1 << 23)))
6343 signed_addend = -signed_addend;
6344 }
6345
6346 relocation = value + signed_addend;
6347 relocation -= (input_section->output_section->vma
6348 + input_section->output_offset
6349 + rel->r_offset);
6350
6351 value = abs (relocation);
6352
6353 if (value >= 0x1000)
6354 return bfd_reloc_overflow;
6355
6356 insn = (insn & 0xff7ff000) | value;
6357 if (relocation >= 0)
6358 insn |= (1 << 23);
6359
6360 bfd_put_16 (input_bfd, insn >> 16, hit_data);
6361 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
6362
6363 return bfd_reloc_ok;
6364 }
6365
6366 case R_ARM_THM_XPC22:
6367 case R_ARM_THM_CALL:
6368 case R_ARM_THM_JUMP24:
6369 /* Thumb BL (branch long instruction). */
6370 {
6371 bfd_vma relocation;
6372 bfd_vma reloc_sign;
6373 bfd_boolean overflow = FALSE;
6374 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6375 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6376 bfd_signed_vma reloc_signed_max;
6377 bfd_signed_vma reloc_signed_min;
6378 bfd_vma check;
6379 bfd_signed_vma signed_check;
6380 int bitsize;
6381 int thumb2 = using_thumb2 (globals);
6382
6383 /* A branch to an undefined weak symbol is turned into a jump to
6384 the next instruction. */
6385 if (h && h->root.type == bfd_link_hash_undefweak)
6386 {
6387 bfd_put_16 (input_bfd, 0xe000, hit_data);
6388 bfd_put_16 (input_bfd, 0xbf00, hit_data + 2);
6389 return bfd_reloc_ok;
6390 }
6391
6392 /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible
6393 with Thumb-1) involving the J1 and J2 bits. */
6394 if (globals->use_rel)
6395 {
6396 bfd_vma s = (upper_insn & (1 << 10)) >> 10;
6397 bfd_vma upper = upper_insn & 0x3ff;
6398 bfd_vma lower = lower_insn & 0x7ff;
6399 bfd_vma j1 = (lower_insn & (1 << 13)) >> 13;
6400 bfd_vma j2 = (lower_insn & (1 << 11)) >> 11;
6401 bfd_vma i1 = j1 ^ s ? 0 : 1;
6402 bfd_vma i2 = j2 ^ s ? 0 : 1;
6403
6404 addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1);
6405 /* Sign extend. */
6406 addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24);
6407
6408 signed_addend = addend;
6409 }
6410
6411 if (r_type == R_ARM_THM_XPC22)
6412 {
6413 /* Check for Thumb to Thumb call. */
6414 /* FIXME: Should we translate the instruction into a BL
6415 instruction instead ? */
6416 if (sym_flags == STT_ARM_TFUNC)
6417 (*_bfd_error_handler)
6418 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
6419 input_bfd,
6420 h ? h->root.root.string : "(local)");
6421 }
6422 else
6423 {
6424 /* If it is not a call to Thumb, assume call to Arm.
6425 If it is a call relative to a section name, then it is not a
6426 function call at all, but rather a long jump. Calls through
6427 the PLT do not require stubs. */
6428 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
6429 && (h == NULL || splt == NULL
6430 || h->plt.offset == (bfd_vma) -1))
6431 {
6432 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6433 {
6434 /* Convert BL to BLX. */
6435 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6436 }
6437 else if (r_type != R_ARM_THM_CALL)
6438 {
6439 if (elf32_thumb_to_arm_stub
6440 (info, sym_name, input_bfd, output_bfd, input_section,
6441 hit_data, sym_sec, rel->r_offset, signed_addend, value,
6442 error_message))
6443 return bfd_reloc_ok;
6444 else
6445 return bfd_reloc_dangerous;
6446 }
6447 }
6448 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx
6449 && r_type == R_ARM_THM_CALL)
6450 {
6451 /* Make sure this is a BL. */
6452 lower_insn |= 0x1800;
6453 }
6454 }
6455
6456 /* Handle calls via the PLT. */
6457 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6458 {
6459 value = (splt->output_section->vma
6460 + splt->output_offset
6461 + h->plt.offset);
6462 if (globals->use_blx && r_type == R_ARM_THM_CALL)
6463 {
6464 /* If the Thumb BLX instruction is available, convert the
6465 BL to a BLX instruction to call the ARM-mode PLT entry. */
6466 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6467 }
6468 else
6469 /* Target the Thumb stub before the ARM PLT entry. */
6470 value -= PLT_THUMB_STUB_SIZE;
6471 *unresolved_reloc_p = FALSE;
6472 }
6473
6474 if (r_type == R_ARM_THM_CALL)
6475 {
6476 /* Check if a stub has to be inserted because the destination
6477 is too far. */
6478 bfd_vma from;
6479 bfd_signed_vma branch_offset;
6480 struct elf32_arm_stub_hash_entry *stub_entry = NULL;
6481
6482 from = (input_section->output_section->vma
6483 + input_section->output_offset
6484 + rel->r_offset);
6485 branch_offset = (bfd_signed_vma)(value - from);
6486
6487 if ((!thumb2
6488 && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET
6489 || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET)))
6490 ||
6491 (thumb2
6492 && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET
6493 || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET)))
6494 || ((sym_flags != STT_ARM_TFUNC) && !globals->use_blx))
6495 {
6496 /* The target is out of reach or we are changing modes, so
6497 redirect the branch to the local stub for this
6498 function. */
6499 stub_entry = elf32_arm_get_stub_entry (input_section,
6500 sym_sec, h,
6501 rel, globals);
6502 if (stub_entry != NULL)
6503 value = (stub_entry->stub_offset
6504 + stub_entry->stub_sec->output_offset
6505 + stub_entry->stub_sec->output_section->vma);
6506
6507 /* If this call becomes a call to Arm, force BLX. */
6508 if (globals->use_blx)
6509 {
6510 if ((stub_entry
6511 && !arm_stub_is_thumb (stub_entry->stub_type))
6512 || (sym_flags != STT_ARM_TFUNC))
6513 lower_insn = (lower_insn & ~0x1000) | 0x0800;
6514 }
6515 }
6516 }
6517
6518 relocation = value + signed_addend;
6519
6520 relocation -= (input_section->output_section->vma
6521 + input_section->output_offset
6522 + rel->r_offset);
6523
6524 check = relocation >> howto->rightshift;
6525
6526 /* If this is a signed value, the rightshift just dropped
6527 leading 1 bits (assuming twos complement). */
6528 if ((bfd_signed_vma) relocation >= 0)
6529 signed_check = check;
6530 else
6531 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
6532
6533 /* Calculate the permissable maximum and minimum values for
6534 this relocation according to whether we're relocating for
6535 Thumb-2 or not. */
6536 bitsize = howto->bitsize;
6537 if (!thumb2)
6538 bitsize -= 2;
6539 reloc_signed_max = ((1 << (bitsize - 1)) - 1) >> howto->rightshift;
6540 reloc_signed_min = ~reloc_signed_max;
6541
6542 /* Assumes two's complement. */
6543 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6544 overflow = TRUE;
6545
6546 if ((lower_insn & 0x5000) == 0x4000)
6547 /* For a BLX instruction, make sure that the relocation is rounded up
6548 to a word boundary. This follows the semantics of the instruction
6549 which specifies that bit 1 of the target address will come from bit
6550 1 of the base address. */
6551 relocation = (relocation + 2) & ~ 3;
6552
6553 /* Put RELOCATION back into the insn. Assumes two's complement.
6554 We use the Thumb-2 encoding, which is safe even if dealing with
6555 a Thumb-1 instruction by virtue of our overflow check above. */
6556 reloc_sign = (signed_check < 0) ? 1 : 0;
6557 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff)
6558 | ((relocation >> 12) & 0x3ff)
6559 | (reloc_sign << 10);
6560 lower_insn = (lower_insn & ~(bfd_vma) 0x2fff)
6561 | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13)
6562 | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11)
6563 | ((relocation >> 1) & 0x7ff);
6564
6565 /* Put the relocated value back in the object file: */
6566 bfd_put_16 (input_bfd, upper_insn, hit_data);
6567 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6568
6569 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6570 }
6571 break;
6572
6573 case R_ARM_THM_JUMP19:
6574 /* Thumb32 conditional branch instruction. */
6575 {
6576 bfd_vma relocation;
6577 bfd_boolean overflow = FALSE;
6578 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
6579 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
6580 bfd_signed_vma reloc_signed_max = 0xffffe;
6581 bfd_signed_vma reloc_signed_min = -0x100000;
6582 bfd_signed_vma signed_check;
6583
6584 /* Need to refetch the addend, reconstruct the top three bits,
6585 and squish the two 11 bit pieces together. */
6586 if (globals->use_rel)
6587 {
6588 bfd_vma S = (upper_insn & 0x0400) >> 10;
6589 bfd_vma upper = (upper_insn & 0x003f);
6590 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
6591 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
6592 bfd_vma lower = (lower_insn & 0x07ff);
6593
6594 upper |= J1 << 6;
6595 upper |= J2 << 7;
6596 upper |= (!S) << 8;
6597 upper -= 0x0100; /* Sign extend. */
6598
6599 addend = (upper << 12) | (lower << 1);
6600 signed_addend = addend;
6601 }
6602
6603 /* Handle calls via the PLT. */
6604 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
6605 {
6606 value = (splt->output_section->vma
6607 + splt->output_offset
6608 + h->plt.offset);
6609 /* Target the Thumb stub before the ARM PLT entry. */
6610 value -= PLT_THUMB_STUB_SIZE;
6611 *unresolved_reloc_p = FALSE;
6612 }
6613
6614 /* ??? Should handle interworking? GCC might someday try to
6615 use this for tail calls. */
6616
6617 relocation = value + signed_addend;
6618 relocation -= (input_section->output_section->vma
6619 + input_section->output_offset
6620 + rel->r_offset);
6621 signed_check = (bfd_signed_vma) relocation;
6622
6623 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6624 overflow = TRUE;
6625
6626 /* Put RELOCATION back into the insn. */
6627 {
6628 bfd_vma S = (relocation & 0x00100000) >> 20;
6629 bfd_vma J2 = (relocation & 0x00080000) >> 19;
6630 bfd_vma J1 = (relocation & 0x00040000) >> 18;
6631 bfd_vma hi = (relocation & 0x0003f000) >> 12;
6632 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
6633
6634 upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi;
6635 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
6636 }
6637
6638 /* Put the relocated value back in the object file: */
6639 bfd_put_16 (input_bfd, upper_insn, hit_data);
6640 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
6641
6642 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
6643 }
6644
6645 case R_ARM_THM_JUMP11:
6646 case R_ARM_THM_JUMP8:
6647 case R_ARM_THM_JUMP6:
6648 /* Thumb B (branch) instruction). */
6649 {
6650 bfd_signed_vma relocation;
6651 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
6652 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
6653 bfd_signed_vma signed_check;
6654
6655 /* CZB cannot jump backward. */
6656 if (r_type == R_ARM_THM_JUMP6)
6657 reloc_signed_min = 0;
6658
6659 if (globals->use_rel)
6660 {
6661 /* Need to refetch addend. */
6662 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
6663 if (addend & ((howto->src_mask + 1) >> 1))
6664 {
6665 signed_addend = -1;
6666 signed_addend &= ~ howto->src_mask;
6667 signed_addend |= addend;
6668 }
6669 else
6670 signed_addend = addend;
6671 /* The value in the insn has been right shifted. We need to
6672 undo this, so that we can perform the address calculation
6673 in terms of bytes. */
6674 signed_addend <<= howto->rightshift;
6675 }
6676 relocation = value + signed_addend;
6677
6678 relocation -= (input_section->output_section->vma
6679 + input_section->output_offset
6680 + rel->r_offset);
6681
6682 relocation >>= howto->rightshift;
6683 signed_check = relocation;
6684
6685 if (r_type == R_ARM_THM_JUMP6)
6686 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
6687 else
6688 relocation &= howto->dst_mask;
6689 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
6690
6691 bfd_put_16 (input_bfd, relocation, hit_data);
6692
6693 /* Assumes two's complement. */
6694 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
6695 return bfd_reloc_overflow;
6696
6697 return bfd_reloc_ok;
6698 }
6699
6700 case R_ARM_ALU_PCREL7_0:
6701 case R_ARM_ALU_PCREL15_8:
6702 case R_ARM_ALU_PCREL23_15:
6703 {
6704 bfd_vma insn;
6705 bfd_vma relocation;
6706
6707 insn = bfd_get_32 (input_bfd, hit_data);
6708 if (globals->use_rel)
6709 {
6710 /* Extract the addend. */
6711 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
6712 signed_addend = addend;
6713 }
6714 relocation = value + signed_addend;
6715
6716 relocation -= (input_section->output_section->vma
6717 + input_section->output_offset
6718 + rel->r_offset);
6719 insn = (insn & ~0xfff)
6720 | ((howto->bitpos << 7) & 0xf00)
6721 | ((relocation >> howto->bitpos) & 0xff);
6722 bfd_put_32 (input_bfd, value, hit_data);
6723 }
6724 return bfd_reloc_ok;
6725
6726 case R_ARM_GNU_VTINHERIT:
6727 case R_ARM_GNU_VTENTRY:
6728 return bfd_reloc_ok;
6729
6730 case R_ARM_GOTOFF32:
6731 /* Relocation is relative to the start of the
6732 global offset table. */
6733
6734 BFD_ASSERT (sgot != NULL);
6735 if (sgot == NULL)
6736 return bfd_reloc_notsupported;
6737
6738 /* If we are addressing a Thumb function, we need to adjust the
6739 address by one, so that attempts to call the function pointer will
6740 correctly interpret it as Thumb code. */
6741 if (sym_flags == STT_ARM_TFUNC)
6742 value += 1;
6743
6744 /* Note that sgot->output_offset is not involved in this
6745 calculation. We always want the start of .got. If we
6746 define _GLOBAL_OFFSET_TABLE in a different way, as is
6747 permitted by the ABI, we might have to change this
6748 calculation. */
6749 value -= sgot->output_section->vma;
6750 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6751 contents, rel->r_offset, value,
6752 rel->r_addend);
6753
6754 case R_ARM_GOTPC:
6755 /* Use global offset table as symbol value. */
6756 BFD_ASSERT (sgot != NULL);
6757
6758 if (sgot == NULL)
6759 return bfd_reloc_notsupported;
6760
6761 *unresolved_reloc_p = FALSE;
6762 value = sgot->output_section->vma;
6763 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6764 contents, rel->r_offset, value,
6765 rel->r_addend);
6766
6767 case R_ARM_GOT32:
6768 case R_ARM_GOT_PREL:
6769 /* Relocation is to the entry for this symbol in the
6770 global offset table. */
6771 if (sgot == NULL)
6772 return bfd_reloc_notsupported;
6773
6774 if (h != NULL)
6775 {
6776 bfd_vma off;
6777 bfd_boolean dyn;
6778
6779 off = h->got.offset;
6780 BFD_ASSERT (off != (bfd_vma) -1);
6781 dyn = globals->root.dynamic_sections_created;
6782
6783 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6784 || (info->shared
6785 && SYMBOL_REFERENCES_LOCAL (info, h))
6786 || (ELF_ST_VISIBILITY (h->other)
6787 && h->root.type == bfd_link_hash_undefweak))
6788 {
6789 /* This is actually a static link, or it is a -Bsymbolic link
6790 and the symbol is defined locally. We must initialize this
6791 entry in the global offset table. Since the offset must
6792 always be a multiple of 4, we use the least significant bit
6793 to record whether we have initialized it already.
6794
6795 When doing a dynamic link, we create a .rel(a).got relocation
6796 entry to initialize the value. This is done in the
6797 finish_dynamic_symbol routine. */
6798 if ((off & 1) != 0)
6799 off &= ~1;
6800 else
6801 {
6802 /* If we are addressing a Thumb function, we need to
6803 adjust the address by one, so that attempts to
6804 call the function pointer will correctly
6805 interpret it as Thumb code. */
6806 if (sym_flags == STT_ARM_TFUNC)
6807 value |= 1;
6808
6809 bfd_put_32 (output_bfd, value, sgot->contents + off);
6810 h->got.offset |= 1;
6811 }
6812 }
6813 else
6814 *unresolved_reloc_p = FALSE;
6815
6816 value = sgot->output_offset + off;
6817 }
6818 else
6819 {
6820 bfd_vma off;
6821
6822 BFD_ASSERT (local_got_offsets != NULL &&
6823 local_got_offsets[r_symndx] != (bfd_vma) -1);
6824
6825 off = local_got_offsets[r_symndx];
6826
6827 /* The offset must always be a multiple of 4. We use the
6828 least significant bit to record whether we have already
6829 generated the necessary reloc. */
6830 if ((off & 1) != 0)
6831 off &= ~1;
6832 else
6833 {
6834 /* If we are addressing a Thumb function, we need to
6835 adjust the address by one, so that attempts to
6836 call the function pointer will correctly
6837 interpret it as Thumb code. */
6838 if (sym_flags == STT_ARM_TFUNC)
6839 value |= 1;
6840
6841 if (globals->use_rel)
6842 bfd_put_32 (output_bfd, value, sgot->contents + off);
6843
6844 if (info->shared)
6845 {
6846 asection * srelgot;
6847 Elf_Internal_Rela outrel;
6848 bfd_byte *loc;
6849
6850 srelgot = (bfd_get_section_by_name
6851 (dynobj, RELOC_SECTION (globals, ".got")));
6852 BFD_ASSERT (srelgot != NULL);
6853
6854 outrel.r_addend = addend + value;
6855 outrel.r_offset = (sgot->output_section->vma
6856 + sgot->output_offset
6857 + off);
6858 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
6859 loc = srelgot->contents;
6860 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
6861 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6862 }
6863
6864 local_got_offsets[r_symndx] |= 1;
6865 }
6866
6867 value = sgot->output_offset + off;
6868 }
6869 if (r_type != R_ARM_GOT32)
6870 value += sgot->output_section->vma;
6871
6872 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6873 contents, rel->r_offset, value,
6874 rel->r_addend);
6875
6876 case R_ARM_TLS_LDO32:
6877 value = value - dtpoff_base (info);
6878
6879 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6880 contents, rel->r_offset, value,
6881 rel->r_addend);
6882
6883 case R_ARM_TLS_LDM32:
6884 {
6885 bfd_vma off;
6886
6887 if (globals->sgot == NULL)
6888 abort ();
6889
6890 off = globals->tls_ldm_got.offset;
6891
6892 if ((off & 1) != 0)
6893 off &= ~1;
6894 else
6895 {
6896 /* If we don't know the module number, create a relocation
6897 for it. */
6898 if (info->shared)
6899 {
6900 Elf_Internal_Rela outrel;
6901 bfd_byte *loc;
6902
6903 if (globals->srelgot == NULL)
6904 abort ();
6905
6906 outrel.r_addend = 0;
6907 outrel.r_offset = (globals->sgot->output_section->vma
6908 + globals->sgot->output_offset + off);
6909 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
6910
6911 if (globals->use_rel)
6912 bfd_put_32 (output_bfd, outrel.r_addend,
6913 globals->sgot->contents + off);
6914
6915 loc = globals->srelgot->contents;
6916 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
6917 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
6918 }
6919 else
6920 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
6921
6922 globals->tls_ldm_got.offset |= 1;
6923 }
6924
6925 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
6926 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
6927
6928 return _bfd_final_link_relocate (howto, input_bfd, input_section,
6929 contents, rel->r_offset, value,
6930 rel->r_addend);
6931 }
6932
6933 case R_ARM_TLS_GD32:
6934 case R_ARM_TLS_IE32:
6935 {
6936 bfd_vma off;
6937 int indx;
6938 char tls_type;
6939
6940 if (globals->sgot == NULL)
6941 abort ();
6942
6943 indx = 0;
6944 if (h != NULL)
6945 {
6946 bfd_boolean dyn;
6947 dyn = globals->root.dynamic_sections_created;
6948 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6949 && (!info->shared
6950 || !SYMBOL_REFERENCES_LOCAL (info, h)))
6951 {
6952 *unresolved_reloc_p = FALSE;
6953 indx = h->dynindx;
6954 }
6955 off = h->got.offset;
6956 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
6957 }
6958 else
6959 {
6960 if (local_got_offsets == NULL)
6961 abort ();
6962 off = local_got_offsets[r_symndx];
6963 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
6964 }
6965
6966 if (tls_type == GOT_UNKNOWN)
6967 abort ();
6968
6969 if ((off & 1) != 0)
6970 off &= ~1;
6971 else
6972 {
6973 bfd_boolean need_relocs = FALSE;
6974 Elf_Internal_Rela outrel;
6975 bfd_byte *loc = NULL;
6976 int cur_off = off;
6977
6978 /* The GOT entries have not been initialized yet. Do it
6979 now, and emit any relocations. If both an IE GOT and a
6980 GD GOT are necessary, we emit the GD first. */
6981
6982 if ((info->shared || indx != 0)
6983 && (h == NULL
6984 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6985 || h->root.type != bfd_link_hash_undefweak))
6986 {
6987 need_relocs = TRUE;
6988 if (globals->srelgot == NULL)
6989 abort ();
6990 loc = globals->srelgot->contents;
6991 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
6992 }
6993
6994 if (tls_type & GOT_TLS_GD)
6995 {
6996 if (need_relocs)
6997 {
6998 outrel.r_addend = 0;
6999 outrel.r_offset = (globals->sgot->output_section->vma
7000 + globals->sgot->output_offset
7001 + cur_off);
7002 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
7003
7004 if (globals->use_rel)
7005 bfd_put_32 (output_bfd, outrel.r_addend,
7006 globals->sgot->contents + cur_off);
7007
7008 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7009 globals->srelgot->reloc_count++;
7010 loc += RELOC_SIZE (globals);
7011
7012 if (indx == 0)
7013 bfd_put_32 (output_bfd, value - dtpoff_base (info),
7014 globals->sgot->contents + cur_off + 4);
7015 else
7016 {
7017 outrel.r_addend = 0;
7018 outrel.r_info = ELF32_R_INFO (indx,
7019 R_ARM_TLS_DTPOFF32);
7020 outrel.r_offset += 4;
7021
7022 if (globals->use_rel)
7023 bfd_put_32 (output_bfd, outrel.r_addend,
7024 globals->sgot->contents + cur_off + 4);
7025
7026
7027 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7028 globals->srelgot->reloc_count++;
7029 loc += RELOC_SIZE (globals);
7030 }
7031 }
7032 else
7033 {
7034 /* If we are not emitting relocations for a
7035 general dynamic reference, then we must be in a
7036 static link or an executable link with the
7037 symbol binding locally. Mark it as belonging
7038 to module 1, the executable. */
7039 bfd_put_32 (output_bfd, 1,
7040 globals->sgot->contents + cur_off);
7041 bfd_put_32 (output_bfd, value - dtpoff_base (info),
7042 globals->sgot->contents + cur_off + 4);
7043 }
7044
7045 cur_off += 8;
7046 }
7047
7048 if (tls_type & GOT_TLS_IE)
7049 {
7050 if (need_relocs)
7051 {
7052 if (indx == 0)
7053 outrel.r_addend = value - dtpoff_base (info);
7054 else
7055 outrel.r_addend = 0;
7056 outrel.r_offset = (globals->sgot->output_section->vma
7057 + globals->sgot->output_offset
7058 + cur_off);
7059 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
7060
7061 if (globals->use_rel)
7062 bfd_put_32 (output_bfd, outrel.r_addend,
7063 globals->sgot->contents + cur_off);
7064
7065 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
7066 globals->srelgot->reloc_count++;
7067 loc += RELOC_SIZE (globals);
7068 }
7069 else
7070 bfd_put_32 (output_bfd, tpoff (info, value),
7071 globals->sgot->contents + cur_off);
7072 cur_off += 4;
7073 }
7074
7075 if (h != NULL)
7076 h->got.offset |= 1;
7077 else
7078 local_got_offsets[r_symndx] |= 1;
7079 }
7080
7081 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
7082 off += 8;
7083 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
7084 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
7085
7086 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7087 contents, rel->r_offset, value,
7088 rel->r_addend);
7089 }
7090
7091 case R_ARM_TLS_LE32:
7092 if (info->shared)
7093 {
7094 (*_bfd_error_handler)
7095 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
7096 input_bfd, input_section,
7097 (long) rel->r_offset, howto->name);
7098 return FALSE;
7099 }
7100 else
7101 value = tpoff (info, value);
7102
7103 return _bfd_final_link_relocate (howto, input_bfd, input_section,
7104 contents, rel->r_offset, value,
7105 rel->r_addend);
7106
7107 case R_ARM_V4BX:
7108 if (globals->fix_v4bx)
7109 {
7110 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7111
7112 /* Ensure that we have a BX instruction. */
7113 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
7114
7115 if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf)
7116 {
7117 /* Branch to veneer. */
7118 bfd_vma glue_addr;
7119 glue_addr = elf32_arm_bx_glue (info, insn & 0xf);
7120 glue_addr -= input_section->output_section->vma
7121 + input_section->output_offset
7122 + rel->r_offset + 8;
7123 insn = (insn & 0xf0000000) | 0x0a000000
7124 | ((glue_addr >> 2) & 0x00ffffff);
7125 }
7126 else
7127 {
7128 /* Preserve Rm (lowest four bits) and the condition code
7129 (highest four bits). Other bits encode MOV PC,Rm. */
7130 insn = (insn & 0xf000000f) | 0x01a0f000;
7131 }
7132
7133 bfd_put_32 (input_bfd, insn, hit_data);
7134 }
7135 return bfd_reloc_ok;
7136
7137 case R_ARM_MOVW_ABS_NC:
7138 case R_ARM_MOVT_ABS:
7139 case R_ARM_MOVW_PREL_NC:
7140 case R_ARM_MOVT_PREL:
7141 /* Until we properly support segment-base-relative addressing then
7142 we assume the segment base to be zero, as for the group relocations.
7143 Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
7144 and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */
7145 case R_ARM_MOVW_BREL_NC:
7146 case R_ARM_MOVW_BREL:
7147 case R_ARM_MOVT_BREL:
7148 {
7149 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7150
7151 if (globals->use_rel)
7152 {
7153 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
7154 signed_addend = (addend ^ 0x8000) - 0x8000;
7155 }
7156
7157 value += signed_addend;
7158
7159 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
7160 value -= (input_section->output_section->vma
7161 + input_section->output_offset + rel->r_offset);
7162
7163 if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
7164 return bfd_reloc_overflow;
7165
7166 if (sym_flags == STT_ARM_TFUNC)
7167 value |= 1;
7168
7169 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
7170 || r_type == R_ARM_MOVT_BREL)
7171 value >>= 16;
7172
7173 insn &= 0xfff0f000;
7174 insn |= value & 0xfff;
7175 insn |= (value & 0xf000) << 4;
7176 bfd_put_32 (input_bfd, insn, hit_data);
7177 }
7178 return bfd_reloc_ok;
7179
7180 case R_ARM_THM_MOVW_ABS_NC:
7181 case R_ARM_THM_MOVT_ABS:
7182 case R_ARM_THM_MOVW_PREL_NC:
7183 case R_ARM_THM_MOVT_PREL:
7184 /* Until we properly support segment-base-relative addressing then
7185 we assume the segment base to be zero, as for the above relocations.
7186 Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as
7187 R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics
7188 as R_ARM_THM_MOVT_ABS. */
7189 case R_ARM_THM_MOVW_BREL_NC:
7190 case R_ARM_THM_MOVW_BREL:
7191 case R_ARM_THM_MOVT_BREL:
7192 {
7193 bfd_vma insn;
7194
7195 insn = bfd_get_16 (input_bfd, hit_data) << 16;
7196 insn |= bfd_get_16 (input_bfd, hit_data + 2);
7197
7198 if (globals->use_rel)
7199 {
7200 addend = ((insn >> 4) & 0xf000)
7201 | ((insn >> 15) & 0x0800)
7202 | ((insn >> 4) & 0x0700)
7203 | (insn & 0x00ff);
7204 signed_addend = (addend ^ 0x8000) - 0x8000;
7205 }
7206
7207 value += signed_addend;
7208
7209 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
7210 value -= (input_section->output_section->vma
7211 + input_section->output_offset + rel->r_offset);
7212
7213 if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000)
7214 return bfd_reloc_overflow;
7215
7216 if (sym_flags == STT_ARM_TFUNC)
7217 value |= 1;
7218
7219 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL
7220 || r_type == R_ARM_THM_MOVT_BREL)
7221 value >>= 16;
7222
7223 insn &= 0xfbf08f00;
7224 insn |= (value & 0xf000) << 4;
7225 insn |= (value & 0x0800) << 15;
7226 insn |= (value & 0x0700) << 4;
7227 insn |= (value & 0x00ff);
7228
7229 bfd_put_16 (input_bfd, insn >> 16, hit_data);
7230 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
7231 }
7232 return bfd_reloc_ok;
7233
7234 case R_ARM_ALU_PC_G0_NC:
7235 case R_ARM_ALU_PC_G1_NC:
7236 case R_ARM_ALU_PC_G0:
7237 case R_ARM_ALU_PC_G1:
7238 case R_ARM_ALU_PC_G2:
7239 case R_ARM_ALU_SB_G0_NC:
7240 case R_ARM_ALU_SB_G1_NC:
7241 case R_ARM_ALU_SB_G0:
7242 case R_ARM_ALU_SB_G1:
7243 case R_ARM_ALU_SB_G2:
7244 {
7245 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7246 bfd_vma pc = input_section->output_section->vma
7247 + input_section->output_offset + rel->r_offset;
7248 /* sb should be the origin of the *segment* containing the symbol.
7249 It is not clear how to obtain this OS-dependent value, so we
7250 make an arbitrary choice of zero. */
7251 bfd_vma sb = 0;
7252 bfd_vma residual;
7253 bfd_vma g_n;
7254 bfd_signed_vma signed_value;
7255 int group = 0;
7256
7257 /* Determine which group of bits to select. */
7258 switch (r_type)
7259 {
7260 case R_ARM_ALU_PC_G0_NC:
7261 case R_ARM_ALU_PC_G0:
7262 case R_ARM_ALU_SB_G0_NC:
7263 case R_ARM_ALU_SB_G0:
7264 group = 0;
7265 break;
7266
7267 case R_ARM_ALU_PC_G1_NC:
7268 case R_ARM_ALU_PC_G1:
7269 case R_ARM_ALU_SB_G1_NC:
7270 case R_ARM_ALU_SB_G1:
7271 group = 1;
7272 break;
7273
7274 case R_ARM_ALU_PC_G2:
7275 case R_ARM_ALU_SB_G2:
7276 group = 2;
7277 break;
7278
7279 default:
7280 abort ();
7281 }
7282
7283 /* If REL, extract the addend from the insn. If RELA, it will
7284 have already been fetched for us. */
7285 if (globals->use_rel)
7286 {
7287 int negative;
7288 bfd_vma constant = insn & 0xff;
7289 bfd_vma rotation = (insn & 0xf00) >> 8;
7290
7291 if (rotation == 0)
7292 signed_addend = constant;
7293 else
7294 {
7295 /* Compensate for the fact that in the instruction, the
7296 rotation is stored in multiples of 2 bits. */
7297 rotation *= 2;
7298
7299 /* Rotate "constant" right by "rotation" bits. */
7300 signed_addend = (constant >> rotation) |
7301 (constant << (8 * sizeof (bfd_vma) - rotation));
7302 }
7303
7304 /* Determine if the instruction is an ADD or a SUB.
7305 (For REL, this determines the sign of the addend.) */
7306 negative = identify_add_or_sub (insn);
7307 if (negative == 0)
7308 {
7309 (*_bfd_error_handler)
7310 (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"),
7311 input_bfd, input_section,
7312 (long) rel->r_offset, howto->name);
7313 return bfd_reloc_overflow;
7314 }
7315
7316 signed_addend *= negative;
7317 }
7318
7319 /* Compute the value (X) to go in the place. */
7320 if (r_type == R_ARM_ALU_PC_G0_NC
7321 || r_type == R_ARM_ALU_PC_G1_NC
7322 || r_type == R_ARM_ALU_PC_G0
7323 || r_type == R_ARM_ALU_PC_G1
7324 || r_type == R_ARM_ALU_PC_G2)
7325 /* PC relative. */
7326 signed_value = value - pc + signed_addend;
7327 else
7328 /* Section base relative. */
7329 signed_value = value - sb + signed_addend;
7330
7331 /* If the target symbol is a Thumb function, then set the
7332 Thumb bit in the address. */
7333 if (sym_flags == STT_ARM_TFUNC)
7334 signed_value |= 1;
7335
7336 /* Calculate the value of the relevant G_n, in encoded
7337 constant-with-rotation format. */
7338 g_n = calculate_group_reloc_mask (abs (signed_value), group,
7339 &residual);
7340
7341 /* Check for overflow if required. */
7342 if ((r_type == R_ARM_ALU_PC_G0
7343 || r_type == R_ARM_ALU_PC_G1
7344 || r_type == R_ARM_ALU_PC_G2
7345 || r_type == R_ARM_ALU_SB_G0
7346 || r_type == R_ARM_ALU_SB_G1
7347 || r_type == R_ARM_ALU_SB_G2) && residual != 0)
7348 {
7349 (*_bfd_error_handler)
7350 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7351 input_bfd, input_section,
7352 (long) rel->r_offset, abs (signed_value), howto->name);
7353 return bfd_reloc_overflow;
7354 }
7355
7356 /* Mask out the value and the ADD/SUB part of the opcode; take care
7357 not to destroy the S bit. */
7358 insn &= 0xff1ff000;
7359
7360 /* Set the opcode according to whether the value to go in the
7361 place is negative. */
7362 if (signed_value < 0)
7363 insn |= 1 << 22;
7364 else
7365 insn |= 1 << 23;
7366
7367 /* Encode the offset. */
7368 insn |= g_n;
7369
7370 bfd_put_32 (input_bfd, insn, hit_data);
7371 }
7372 return bfd_reloc_ok;
7373
7374 case R_ARM_LDR_PC_G0:
7375 case R_ARM_LDR_PC_G1:
7376 case R_ARM_LDR_PC_G2:
7377 case R_ARM_LDR_SB_G0:
7378 case R_ARM_LDR_SB_G1:
7379 case R_ARM_LDR_SB_G2:
7380 {
7381 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7382 bfd_vma pc = input_section->output_section->vma
7383 + input_section->output_offset + rel->r_offset;
7384 bfd_vma sb = 0; /* See note above. */
7385 bfd_vma residual;
7386 bfd_signed_vma signed_value;
7387 int group = 0;
7388
7389 /* Determine which groups of bits to calculate. */
7390 switch (r_type)
7391 {
7392 case R_ARM_LDR_PC_G0:
7393 case R_ARM_LDR_SB_G0:
7394 group = 0;
7395 break;
7396
7397 case R_ARM_LDR_PC_G1:
7398 case R_ARM_LDR_SB_G1:
7399 group = 1;
7400 break;
7401
7402 case R_ARM_LDR_PC_G2:
7403 case R_ARM_LDR_SB_G2:
7404 group = 2;
7405 break;
7406
7407 default:
7408 abort ();
7409 }
7410
7411 /* If REL, extract the addend from the insn. If RELA, it will
7412 have already been fetched for us. */
7413 if (globals->use_rel)
7414 {
7415 int negative = (insn & (1 << 23)) ? 1 : -1;
7416 signed_addend = negative * (insn & 0xfff);
7417 }
7418
7419 /* Compute the value (X) to go in the place. */
7420 if (r_type == R_ARM_LDR_PC_G0
7421 || r_type == R_ARM_LDR_PC_G1
7422 || r_type == R_ARM_LDR_PC_G2)
7423 /* PC relative. */
7424 signed_value = value - pc + signed_addend;
7425 else
7426 /* Section base relative. */
7427 signed_value = value - sb + signed_addend;
7428
7429 /* Calculate the value of the relevant G_{n-1} to obtain
7430 the residual at that stage. */
7431 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7432
7433 /* Check for overflow. */
7434 if (residual >= 0x1000)
7435 {
7436 (*_bfd_error_handler)
7437 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7438 input_bfd, input_section,
7439 (long) rel->r_offset, abs (signed_value), howto->name);
7440 return bfd_reloc_overflow;
7441 }
7442
7443 /* Mask out the value and U bit. */
7444 insn &= 0xff7ff000;
7445
7446 /* Set the U bit if the value to go in the place is non-negative. */
7447 if (signed_value >= 0)
7448 insn |= 1 << 23;
7449
7450 /* Encode the offset. */
7451 insn |= residual;
7452
7453 bfd_put_32 (input_bfd, insn, hit_data);
7454 }
7455 return bfd_reloc_ok;
7456
7457 case R_ARM_LDRS_PC_G0:
7458 case R_ARM_LDRS_PC_G1:
7459 case R_ARM_LDRS_PC_G2:
7460 case R_ARM_LDRS_SB_G0:
7461 case R_ARM_LDRS_SB_G1:
7462 case R_ARM_LDRS_SB_G2:
7463 {
7464 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7465 bfd_vma pc = input_section->output_section->vma
7466 + input_section->output_offset + rel->r_offset;
7467 bfd_vma sb = 0; /* See note above. */
7468 bfd_vma residual;
7469 bfd_signed_vma signed_value;
7470 int group = 0;
7471
7472 /* Determine which groups of bits to calculate. */
7473 switch (r_type)
7474 {
7475 case R_ARM_LDRS_PC_G0:
7476 case R_ARM_LDRS_SB_G0:
7477 group = 0;
7478 break;
7479
7480 case R_ARM_LDRS_PC_G1:
7481 case R_ARM_LDRS_SB_G1:
7482 group = 1;
7483 break;
7484
7485 case R_ARM_LDRS_PC_G2:
7486 case R_ARM_LDRS_SB_G2:
7487 group = 2;
7488 break;
7489
7490 default:
7491 abort ();
7492 }
7493
7494 /* If REL, extract the addend from the insn. If RELA, it will
7495 have already been fetched for us. */
7496 if (globals->use_rel)
7497 {
7498 int negative = (insn & (1 << 23)) ? 1 : -1;
7499 signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf));
7500 }
7501
7502 /* Compute the value (X) to go in the place. */
7503 if (r_type == R_ARM_LDRS_PC_G0
7504 || r_type == R_ARM_LDRS_PC_G1
7505 || r_type == R_ARM_LDRS_PC_G2)
7506 /* PC relative. */
7507 signed_value = value - pc + signed_addend;
7508 else
7509 /* Section base relative. */
7510 signed_value = value - sb + signed_addend;
7511
7512 /* Calculate the value of the relevant G_{n-1} to obtain
7513 the residual at that stage. */
7514 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7515
7516 /* Check for overflow. */
7517 if (residual >= 0x100)
7518 {
7519 (*_bfd_error_handler)
7520 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7521 input_bfd, input_section,
7522 (long) rel->r_offset, abs (signed_value), howto->name);
7523 return bfd_reloc_overflow;
7524 }
7525
7526 /* Mask out the value and U bit. */
7527 insn &= 0xff7ff0f0;
7528
7529 /* Set the U bit if the value to go in the place is non-negative. */
7530 if (signed_value >= 0)
7531 insn |= 1 << 23;
7532
7533 /* Encode the offset. */
7534 insn |= ((residual & 0xf0) << 4) | (residual & 0xf);
7535
7536 bfd_put_32 (input_bfd, insn, hit_data);
7537 }
7538 return bfd_reloc_ok;
7539
7540 case R_ARM_LDC_PC_G0:
7541 case R_ARM_LDC_PC_G1:
7542 case R_ARM_LDC_PC_G2:
7543 case R_ARM_LDC_SB_G0:
7544 case R_ARM_LDC_SB_G1:
7545 case R_ARM_LDC_SB_G2:
7546 {
7547 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
7548 bfd_vma pc = input_section->output_section->vma
7549 + input_section->output_offset + rel->r_offset;
7550 bfd_vma sb = 0; /* See note above. */
7551 bfd_vma residual;
7552 bfd_signed_vma signed_value;
7553 int group = 0;
7554
7555 /* Determine which groups of bits to calculate. */
7556 switch (r_type)
7557 {
7558 case R_ARM_LDC_PC_G0:
7559 case R_ARM_LDC_SB_G0:
7560 group = 0;
7561 break;
7562
7563 case R_ARM_LDC_PC_G1:
7564 case R_ARM_LDC_SB_G1:
7565 group = 1;
7566 break;
7567
7568 case R_ARM_LDC_PC_G2:
7569 case R_ARM_LDC_SB_G2:
7570 group = 2;
7571 break;
7572
7573 default:
7574 abort ();
7575 }
7576
7577 /* If REL, extract the addend from the insn. If RELA, it will
7578 have already been fetched for us. */
7579 if (globals->use_rel)
7580 {
7581 int negative = (insn & (1 << 23)) ? 1 : -1;
7582 signed_addend = negative * ((insn & 0xff) << 2);
7583 }
7584
7585 /* Compute the value (X) to go in the place. */
7586 if (r_type == R_ARM_LDC_PC_G0
7587 || r_type == R_ARM_LDC_PC_G1
7588 || r_type == R_ARM_LDC_PC_G2)
7589 /* PC relative. */
7590 signed_value = value - pc + signed_addend;
7591 else
7592 /* Section base relative. */
7593 signed_value = value - sb + signed_addend;
7594
7595 /* Calculate the value of the relevant G_{n-1} to obtain
7596 the residual at that stage. */
7597 calculate_group_reloc_mask (abs (signed_value), group - 1, &residual);
7598
7599 /* Check for overflow. (The absolute value to go in the place must be
7600 divisible by four and, after having been divided by four, must
7601 fit in eight bits.) */
7602 if ((residual & 0x3) != 0 || residual >= 0x400)
7603 {
7604 (*_bfd_error_handler)
7605 (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"),
7606 input_bfd, input_section,
7607 (long) rel->r_offset, abs (signed_value), howto->name);
7608 return bfd_reloc_overflow;
7609 }
7610
7611 /* Mask out the value and U bit. */
7612 insn &= 0xff7fff00;
7613
7614 /* Set the U bit if the value to go in the place is non-negative. */
7615 if (signed_value >= 0)
7616 insn |= 1 << 23;
7617
7618 /* Encode the offset. */
7619 insn |= residual >> 2;
7620
7621 bfd_put_32 (input_bfd, insn, hit_data);
7622 }
7623 return bfd_reloc_ok;
7624
7625 default:
7626 return bfd_reloc_notsupported;
7627 }
7628 }
7629
7630 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
7631 static void
7632 arm_add_to_rel (bfd * abfd,
7633 bfd_byte * address,
7634 reloc_howto_type * howto,
7635 bfd_signed_vma increment)
7636 {
7637 bfd_signed_vma addend;
7638
7639 if (howto->type == R_ARM_THM_CALL
7640 || howto->type == R_ARM_THM_JUMP24)
7641 {
7642 int upper_insn, lower_insn;
7643 int upper, lower;
7644
7645 upper_insn = bfd_get_16 (abfd, address);
7646 lower_insn = bfd_get_16 (abfd, address + 2);
7647 upper = upper_insn & 0x7ff;
7648 lower = lower_insn & 0x7ff;
7649
7650 addend = (upper << 12) | (lower << 1);
7651 addend += increment;
7652 addend >>= 1;
7653
7654 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
7655 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
7656
7657 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
7658 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
7659 }
7660 else
7661 {
7662 bfd_vma contents;
7663
7664 contents = bfd_get_32 (abfd, address);
7665
7666 /* Get the (signed) value from the instruction. */
7667 addend = contents & howto->src_mask;
7668 if (addend & ((howto->src_mask + 1) >> 1))
7669 {
7670 bfd_signed_vma mask;
7671
7672 mask = -1;
7673 mask &= ~ howto->src_mask;
7674 addend |= mask;
7675 }
7676
7677 /* Add in the increment, (which is a byte value). */
7678 switch (howto->type)
7679 {
7680 default:
7681 addend += increment;
7682 break;
7683
7684 case R_ARM_PC24:
7685 case R_ARM_PLT32:
7686 case R_ARM_CALL:
7687 case R_ARM_JUMP24:
7688 addend <<= howto->size;
7689 addend += increment;
7690
7691 /* Should we check for overflow here ? */
7692
7693 /* Drop any undesired bits. */
7694 addend >>= howto->rightshift;
7695 break;
7696 }
7697
7698 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
7699
7700 bfd_put_32 (abfd, contents, address);
7701 }
7702 }
7703
7704 #define IS_ARM_TLS_RELOC(R_TYPE) \
7705 ((R_TYPE) == R_ARM_TLS_GD32 \
7706 || (R_TYPE) == R_ARM_TLS_LDO32 \
7707 || (R_TYPE) == R_ARM_TLS_LDM32 \
7708 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
7709 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
7710 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
7711 || (R_TYPE) == R_ARM_TLS_LE32 \
7712 || (R_TYPE) == R_ARM_TLS_IE32)
7713
7714 /* Relocate an ARM ELF section. */
7715
7716 static bfd_boolean
7717 elf32_arm_relocate_section (bfd * output_bfd,
7718 struct bfd_link_info * info,
7719 bfd * input_bfd,
7720 asection * input_section,
7721 bfd_byte * contents,
7722 Elf_Internal_Rela * relocs,
7723 Elf_Internal_Sym * local_syms,
7724 asection ** local_sections)
7725 {
7726 Elf_Internal_Shdr *symtab_hdr;
7727 struct elf_link_hash_entry **sym_hashes;
7728 Elf_Internal_Rela *rel;
7729 Elf_Internal_Rela *relend;
7730 const char *name;
7731 struct elf32_arm_link_hash_table * globals;
7732
7733 globals = elf32_arm_hash_table (info);
7734
7735 symtab_hdr = & elf_symtab_hdr (input_bfd);
7736 sym_hashes = elf_sym_hashes (input_bfd);
7737
7738 rel = relocs;
7739 relend = relocs + input_section->reloc_count;
7740 for (; rel < relend; rel++)
7741 {
7742 int r_type;
7743 reloc_howto_type * howto;
7744 unsigned long r_symndx;
7745 Elf_Internal_Sym * sym;
7746 asection * sec;
7747 struct elf_link_hash_entry * h;
7748 bfd_vma relocation;
7749 bfd_reloc_status_type r;
7750 arelent bfd_reloc;
7751 char sym_type;
7752 bfd_boolean unresolved_reloc = FALSE;
7753 char *error_message = NULL;
7754
7755 r_symndx = ELF32_R_SYM (rel->r_info);
7756 r_type = ELF32_R_TYPE (rel->r_info);
7757 r_type = arm_real_reloc_type (globals, r_type);
7758
7759 if ( r_type == R_ARM_GNU_VTENTRY
7760 || r_type == R_ARM_GNU_VTINHERIT)
7761 continue;
7762
7763 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
7764 howto = bfd_reloc.howto;
7765
7766 h = NULL;
7767 sym = NULL;
7768 sec = NULL;
7769
7770 if (r_symndx < symtab_hdr->sh_info)
7771 {
7772 sym = local_syms + r_symndx;
7773 sym_type = ELF32_ST_TYPE (sym->st_info);
7774 sec = local_sections[r_symndx];
7775 if (globals->use_rel)
7776 {
7777 relocation = (sec->output_section->vma
7778 + sec->output_offset
7779 + sym->st_value);
7780 if (!info->relocatable
7781 && (sec->flags & SEC_MERGE)
7782 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
7783 {
7784 asection *msec;
7785 bfd_vma addend, value;
7786
7787 switch (r_type)
7788 {
7789 case R_ARM_MOVW_ABS_NC:
7790 case R_ARM_MOVT_ABS:
7791 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7792 addend = ((value & 0xf0000) >> 4) | (value & 0xfff);
7793 addend = (addend ^ 0x8000) - 0x8000;
7794 break;
7795
7796 case R_ARM_THM_MOVW_ABS_NC:
7797 case R_ARM_THM_MOVT_ABS:
7798 value = bfd_get_16 (input_bfd, contents + rel->r_offset)
7799 << 16;
7800 value |= bfd_get_16 (input_bfd,
7801 contents + rel->r_offset + 2);
7802 addend = ((value & 0xf7000) >> 4) | (value & 0xff)
7803 | ((value & 0x04000000) >> 15);
7804 addend = (addend ^ 0x8000) - 0x8000;
7805 break;
7806
7807 default:
7808 if (howto->rightshift
7809 || (howto->src_mask & (howto->src_mask + 1)))
7810 {
7811 (*_bfd_error_handler)
7812 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
7813 input_bfd, input_section,
7814 (long) rel->r_offset, howto->name);
7815 return FALSE;
7816 }
7817
7818 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
7819
7820 /* Get the (signed) value from the instruction. */
7821 addend = value & howto->src_mask;
7822 if (addend & ((howto->src_mask + 1) >> 1))
7823 {
7824 bfd_signed_vma mask;
7825
7826 mask = -1;
7827 mask &= ~ howto->src_mask;
7828 addend |= mask;
7829 }
7830 break;
7831 }
7832
7833 msec = sec;
7834 addend =
7835 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
7836 - relocation;
7837 addend += msec->output_section->vma + msec->output_offset;
7838
7839 /* Cases here must match those in the preceeding
7840 switch statement. */
7841 switch (r_type)
7842 {
7843 case R_ARM_MOVW_ABS_NC:
7844 case R_ARM_MOVT_ABS:
7845 value = (value & 0xfff0f000) | ((addend & 0xf000) << 4)
7846 | (addend & 0xfff);
7847 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
7848 break;
7849
7850 case R_ARM_THM_MOVW_ABS_NC:
7851 case R_ARM_THM_MOVT_ABS:
7852 value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4)
7853 | (addend & 0xff) | ((addend & 0x0800) << 15);
7854 bfd_put_16 (input_bfd, value >> 16,
7855 contents + rel->r_offset);
7856 bfd_put_16 (input_bfd, value,
7857 contents + rel->r_offset + 2);
7858 break;
7859
7860 default:
7861 value = (value & ~ howto->dst_mask)
7862 | (addend & howto->dst_mask);
7863 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
7864 break;
7865 }
7866 }
7867 }
7868 else
7869 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7870 }
7871 else
7872 {
7873 bfd_boolean warned;
7874
7875 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7876 r_symndx, symtab_hdr, sym_hashes,
7877 h, sec, relocation,
7878 unresolved_reloc, warned);
7879
7880 sym_type = h->type;
7881 }
7882
7883 if (sec != NULL && elf_discarded_section (sec))
7884 {
7885 /* For relocs against symbols from removed linkonce sections,
7886 or sections discarded by a linker script, we just want the
7887 section contents zeroed. Avoid any special processing. */
7888 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
7889 rel->r_info = 0;
7890 rel->r_addend = 0;
7891 continue;
7892 }
7893
7894 if (info->relocatable)
7895 {
7896 /* This is a relocatable link. We don't have to change
7897 anything, unless the reloc is against a section symbol,
7898 in which case we have to adjust according to where the
7899 section symbol winds up in the output section. */
7900 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
7901 {
7902 if (globals->use_rel)
7903 arm_add_to_rel (input_bfd, contents + rel->r_offset,
7904 howto, (bfd_signed_vma) sec->output_offset);
7905 else
7906 rel->r_addend += sec->output_offset;
7907 }
7908 continue;
7909 }
7910
7911 if (h != NULL)
7912 name = h->root.root.string;
7913 else
7914 {
7915 name = (bfd_elf_string_from_elf_section
7916 (input_bfd, symtab_hdr->sh_link, sym->st_name));
7917 if (name == NULL || *name == '\0')
7918 name = bfd_section_name (input_bfd, sec);
7919 }
7920
7921 if (r_symndx != 0
7922 && r_type != R_ARM_NONE
7923 && (h == NULL
7924 || h->root.type == bfd_link_hash_defined
7925 || h->root.type == bfd_link_hash_defweak)
7926 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7927 {
7928 (*_bfd_error_handler)
7929 ((sym_type == STT_TLS
7930 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
7931 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
7932 input_bfd,
7933 input_section,
7934 (long) rel->r_offset,
7935 howto->name,
7936 name);
7937 }
7938
7939 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
7940 input_section, contents, rel,
7941 relocation, info, sec, name,
7942 (h ? ELF_ST_TYPE (h->type) :
7943 ELF_ST_TYPE (sym->st_info)), h,
7944 &unresolved_reloc, &error_message);
7945
7946 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
7947 because such sections are not SEC_ALLOC and thus ld.so will
7948 not process them. */
7949 if (unresolved_reloc
7950 && !((input_section->flags & SEC_DEBUGGING) != 0
7951 && h->def_dynamic))
7952 {
7953 (*_bfd_error_handler)
7954 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7955 input_bfd,
7956 input_section,
7957 (long) rel->r_offset,
7958 howto->name,
7959 h->root.root.string);
7960 return FALSE;
7961 }
7962
7963 if (r != bfd_reloc_ok)
7964 {
7965 switch (r)
7966 {
7967 case bfd_reloc_overflow:
7968 /* If the overflowing reloc was to an undefined symbol,
7969 we have already printed one error message and there
7970 is no point complaining again. */
7971 if ((! h ||
7972 h->root.type != bfd_link_hash_undefined)
7973 && (!((*info->callbacks->reloc_overflow)
7974 (info, (h ? &h->root : NULL), name, howto->name,
7975 (bfd_vma) 0, input_bfd, input_section,
7976 rel->r_offset))))
7977 return FALSE;
7978 break;
7979
7980 case bfd_reloc_undefined:
7981 if (!((*info->callbacks->undefined_symbol)
7982 (info, name, input_bfd, input_section,
7983 rel->r_offset, TRUE)))
7984 return FALSE;
7985 break;
7986
7987 case bfd_reloc_outofrange:
7988 error_message = _("out of range");
7989 goto common_error;
7990
7991 case bfd_reloc_notsupported:
7992 error_message = _("unsupported relocation");
7993 goto common_error;
7994
7995 case bfd_reloc_dangerous:
7996 /* error_message should already be set. */
7997 goto common_error;
7998
7999 default:
8000 error_message = _("unknown error");
8001 /* Fall through. */
8002
8003 common_error:
8004 BFD_ASSERT (error_message != NULL);
8005 if (!((*info->callbacks->reloc_dangerous)
8006 (info, error_message, input_bfd, input_section,
8007 rel->r_offset)))
8008 return FALSE;
8009 break;
8010 }
8011 }
8012 }
8013
8014 return TRUE;
8015 }
8016
8017 /* Set the right machine number. */
8018
8019 static bfd_boolean
8020 elf32_arm_object_p (bfd *abfd)
8021 {
8022 unsigned int mach;
8023
8024 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
8025
8026 if (mach != bfd_mach_arm_unknown)
8027 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8028
8029 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
8030 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
8031
8032 else
8033 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
8034
8035 return TRUE;
8036 }
8037
8038 /* Function to keep ARM specific flags in the ELF header. */
8039
8040 static bfd_boolean
8041 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
8042 {
8043 if (elf_flags_init (abfd)
8044 && elf_elfheader (abfd)->e_flags != flags)
8045 {
8046 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
8047 {
8048 if (flags & EF_ARM_INTERWORK)
8049 (*_bfd_error_handler)
8050 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
8051 abfd);
8052 else
8053 _bfd_error_handler
8054 (_("Warning: Clearing the interworking flag of %B due to outside request"),
8055 abfd);
8056 }
8057 }
8058 else
8059 {
8060 elf_elfheader (abfd)->e_flags = flags;
8061 elf_flags_init (abfd) = TRUE;
8062 }
8063
8064 return TRUE;
8065 }
8066
8067 /* Copy backend specific data from one object module to another. */
8068
8069 static bfd_boolean
8070 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
8071 {
8072 flagword in_flags;
8073 flagword out_flags;
8074
8075 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
8076 return TRUE;
8077
8078 in_flags = elf_elfheader (ibfd)->e_flags;
8079 out_flags = elf_elfheader (obfd)->e_flags;
8080
8081 if (elf_flags_init (obfd)
8082 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
8083 && in_flags != out_flags)
8084 {
8085 /* Cannot mix APCS26 and APCS32 code. */
8086 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
8087 return FALSE;
8088
8089 /* Cannot mix float APCS and non-float APCS code. */
8090 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
8091 return FALSE;
8092
8093 /* If the src and dest have different interworking flags
8094 then turn off the interworking bit. */
8095 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8096 {
8097 if (out_flags & EF_ARM_INTERWORK)
8098 _bfd_error_handler
8099 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
8100 obfd, ibfd);
8101
8102 in_flags &= ~EF_ARM_INTERWORK;
8103 }
8104
8105 /* Likewise for PIC, though don't warn for this case. */
8106 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
8107 in_flags &= ~EF_ARM_PIC;
8108 }
8109
8110 elf_elfheader (obfd)->e_flags = in_flags;
8111 elf_flags_init (obfd) = TRUE;
8112
8113 /* Also copy the EI_OSABI field. */
8114 elf_elfheader (obfd)->e_ident[EI_OSABI] =
8115 elf_elfheader (ibfd)->e_ident[EI_OSABI];
8116
8117 /* Copy object attributes. */
8118 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8119
8120 return TRUE;
8121 }
8122
8123 /* Values for Tag_ABI_PCS_R9_use. */
8124 enum
8125 {
8126 AEABI_R9_V6,
8127 AEABI_R9_SB,
8128 AEABI_R9_TLS,
8129 AEABI_R9_unused
8130 };
8131
8132 /* Values for Tag_ABI_PCS_RW_data. */
8133 enum
8134 {
8135 AEABI_PCS_RW_data_absolute,
8136 AEABI_PCS_RW_data_PCrel,
8137 AEABI_PCS_RW_data_SBrel,
8138 AEABI_PCS_RW_data_unused
8139 };
8140
8141 /* Values for Tag_ABI_enum_size. */
8142 enum
8143 {
8144 AEABI_enum_unused,
8145 AEABI_enum_short,
8146 AEABI_enum_wide,
8147 AEABI_enum_forced_wide
8148 };
8149
8150 /* Determine whether an object attribute tag takes an integer, a
8151 string or both. */
8152
8153 static int
8154 elf32_arm_obj_attrs_arg_type (int tag)
8155 {
8156 if (tag == Tag_compatibility)
8157 return 3;
8158 else if (tag == 4 || tag == 5)
8159 return 2;
8160 else if (tag < 32)
8161 return 1;
8162 else
8163 return (tag & 1) != 0 ? 2 : 1;
8164 }
8165
8166 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
8167 are conflicting attributes. */
8168
8169 static bfd_boolean
8170 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
8171 {
8172 obj_attribute *in_attr;
8173 obj_attribute *out_attr;
8174 obj_attribute_list *in_list;
8175 /* Some tags have 0 = don't care, 1 = strong requirement,
8176 2 = weak requirement. */
8177 static const int order_312[3] = {3, 1, 2};
8178 /* For use with Tag_VFP_arch. */
8179 static const int order_01243[5] = {0, 1, 2, 4, 3};
8180 int i;
8181
8182 if (!elf_known_obj_attributes_proc (obfd)[0].i)
8183 {
8184 /* This is the first object. Copy the attributes. */
8185 _bfd_elf_copy_obj_attributes (ibfd, obfd);
8186
8187 /* Use the Tag_null value to indicate the attributes have been
8188 initialized. */
8189 elf_known_obj_attributes_proc (obfd)[0].i = 1;
8190
8191 return TRUE;
8192 }
8193
8194 in_attr = elf_known_obj_attributes_proc (ibfd);
8195 out_attr = elf_known_obj_attributes_proc (obfd);
8196 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
8197 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
8198 {
8199 /* Ignore mismatches if teh object doesn't use floating point. */
8200 if (out_attr[Tag_ABI_FP_number_model].i == 0)
8201 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
8202 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
8203 {
8204 _bfd_error_handler
8205 (_("ERROR: %B uses VFP register arguments, %B does not"),
8206 ibfd, obfd);
8207 return FALSE;
8208 }
8209 }
8210
8211 for (i = 4; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
8212 {
8213 /* Merge this attribute with existing attributes. */
8214 switch (i)
8215 {
8216 case Tag_CPU_raw_name:
8217 case Tag_CPU_name:
8218 /* Use whichever has the greatest architecture requirements. We
8219 won't necessarily have both the above tags, so make sure input
8220 name is non-NULL. */
8221 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i
8222 && in_attr[i].s)
8223 out_attr[i].s = _bfd_elf_attr_strdup (obfd, in_attr[i].s);
8224 break;
8225
8226 case Tag_ABI_optimization_goals:
8227 case Tag_ABI_FP_optimization_goals:
8228 /* Use the first value seen. */
8229 break;
8230
8231 case Tag_CPU_arch:
8232 case Tag_ARM_ISA_use:
8233 case Tag_THUMB_ISA_use:
8234 case Tag_WMMX_arch:
8235 case Tag_NEON_arch:
8236 /* ??? Do NEON and WMMX conflict? */
8237 case Tag_ABI_FP_rounding:
8238 case Tag_ABI_FP_denormal:
8239 case Tag_ABI_FP_exceptions:
8240 case Tag_ABI_FP_user_exceptions:
8241 case Tag_ABI_FP_number_model:
8242 case Tag_ABI_align8_preserved:
8243 case Tag_ABI_HardFP_use:
8244 /* Use the largest value specified. */
8245 if (in_attr[i].i > out_attr[i].i)
8246 out_attr[i].i = in_attr[i].i;
8247 break;
8248
8249 case Tag_CPU_arch_profile:
8250 /* Warn if conflicting architecture profiles used. */
8251 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
8252 {
8253 _bfd_error_handler
8254 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
8255 ibfd, in_attr[i].i, out_attr[i].i);
8256 return FALSE;
8257 }
8258 if (in_attr[i].i)
8259 out_attr[i].i = in_attr[i].i;
8260 break;
8261 case Tag_VFP_arch:
8262 if (in_attr[i].i > 4 || out_attr[i].i > 4
8263 || order_01243[in_attr[i].i] > order_01243[out_attr[i].i])
8264 out_attr[i].i = in_attr[i].i;
8265 break;
8266 case Tag_PCS_config:
8267 if (out_attr[i].i == 0)
8268 out_attr[i].i = in_attr[i].i;
8269 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
8270 {
8271 /* It's sometimes ok to mix different configs, so this is only
8272 a warning. */
8273 _bfd_error_handler
8274 (_("Warning: %B: Conflicting platform configuration"), ibfd);
8275 }
8276 break;
8277 case Tag_ABI_PCS_R9_use:
8278 if (in_attr[i].i != out_attr[i].i
8279 && out_attr[i].i != AEABI_R9_unused
8280 && in_attr[i].i != AEABI_R9_unused)
8281 {
8282 _bfd_error_handler
8283 (_("ERROR: %B: Conflicting use of R9"), ibfd);
8284 return FALSE;
8285 }
8286 if (out_attr[i].i == AEABI_R9_unused)
8287 out_attr[i].i = in_attr[i].i;
8288 break;
8289 case Tag_ABI_PCS_RW_data:
8290 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
8291 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
8292 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
8293 {
8294 _bfd_error_handler
8295 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
8296 ibfd);
8297 return FALSE;
8298 }
8299 /* Use the smallest value specified. */
8300 if (in_attr[i].i < out_attr[i].i)
8301 out_attr[i].i = in_attr[i].i;
8302 break;
8303 case Tag_ABI_PCS_RO_data:
8304 /* Use the smallest value specified. */
8305 if (in_attr[i].i < out_attr[i].i)
8306 out_attr[i].i = in_attr[i].i;
8307 break;
8308 case Tag_ABI_PCS_GOT_use:
8309 if (in_attr[i].i > 2 || out_attr[i].i > 2
8310 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
8311 out_attr[i].i = in_attr[i].i;
8312 break;
8313 case Tag_ABI_PCS_wchar_t:
8314 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
8315 && !elf_arm_tdata (obfd)->no_wchar_size_warning)
8316 {
8317 _bfd_error_handler
8318 (_("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"),
8319 ibfd, in_attr[i].i, out_attr[i].i);
8320 }
8321 else if (in_attr[i].i && !out_attr[i].i)
8322 out_attr[i].i = in_attr[i].i;
8323 break;
8324 case Tag_ABI_align8_needed:
8325 /* ??? Check against Tag_ABI_align8_preserved. */
8326 if (in_attr[i].i > 2 || out_attr[i].i > 2
8327 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
8328 out_attr[i].i = in_attr[i].i;
8329 break;
8330 case Tag_ABI_enum_size:
8331 if (in_attr[i].i != AEABI_enum_unused)
8332 {
8333 if (out_attr[i].i == AEABI_enum_unused
8334 || out_attr[i].i == AEABI_enum_forced_wide)
8335 {
8336 /* The existing object is compatible with anything.
8337 Use whatever requirements the new object has. */
8338 out_attr[i].i = in_attr[i].i;
8339 }
8340 else if (in_attr[i].i != AEABI_enum_forced_wide
8341 && out_attr[i].i != in_attr[i].i
8342 && !elf_arm_tdata (obfd)->no_enum_size_warning)
8343 {
8344 const char *aeabi_enum_names[] =
8345 { "", "variable-size", "32-bit", "" };
8346 _bfd_error_handler
8347 (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"),
8348 ibfd, aeabi_enum_names[in_attr[i].i],
8349 aeabi_enum_names[out_attr[i].i]);
8350 }
8351 }
8352 break;
8353 case Tag_ABI_VFP_args:
8354 /* Aready done. */
8355 break;
8356 case Tag_ABI_WMMX_args:
8357 if (in_attr[i].i != out_attr[i].i)
8358 {
8359 _bfd_error_handler
8360 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
8361 ibfd, obfd);
8362 return FALSE;
8363 }
8364 break;
8365 default: /* All known attributes should be explicitly covered. */
8366 abort ();
8367 }
8368
8369 if (in_attr[i].type && !out_attr[i].type)
8370 switch (in_attr[i].type)
8371 {
8372 case 1:
8373 if (out_attr[i].i)
8374 out_attr[i].type = 1;
8375 break;
8376
8377 case 2:
8378 if (out_attr[i].s)
8379 out_attr[i].type = 2;
8380 break;
8381
8382 default:
8383 abort ();
8384 }
8385 }
8386
8387 /* Merge Tag_compatibility attributes and any common GNU ones. */
8388 _bfd_elf_merge_object_attributes (ibfd, obfd);
8389
8390 /* Check for any attributes not known on ARM. */
8391 in_list = elf_other_obj_attributes_proc (ibfd);
8392 while (in_list && in_list->tag == Tag_compatibility)
8393 in_list = in_list->next;
8394
8395 for (; in_list; in_list = in_list->next)
8396 {
8397 if ((in_list->tag & 128) < 64)
8398 {
8399 _bfd_error_handler
8400 (_("Warning: %B: Unknown EABI object attribute %d"),
8401 ibfd, in_list->tag);
8402 break;
8403 }
8404 }
8405 return TRUE;
8406 }
8407
8408
8409 /* Return TRUE if the two EABI versions are incompatible. */
8410
8411 static bfd_boolean
8412 elf32_arm_versions_compatible (unsigned iver, unsigned over)
8413 {
8414 /* v4 and v5 are the same spec before and after it was released,
8415 so allow mixing them. */
8416 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
8417 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
8418 return TRUE;
8419
8420 return (iver == over);
8421 }
8422
8423 /* Merge backend specific data from an object file to the output
8424 object file when linking. */
8425
8426 static bfd_boolean
8427 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
8428 {
8429 flagword out_flags;
8430 flagword in_flags;
8431 bfd_boolean flags_compatible = TRUE;
8432 asection *sec;
8433
8434 /* Check if we have the same endianess. */
8435 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
8436 return FALSE;
8437
8438 if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd))
8439 return TRUE;
8440
8441 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
8442 return FALSE;
8443
8444 /* The input BFD must have had its flags initialised. */
8445 /* The following seems bogus to me -- The flags are initialized in
8446 the assembler but I don't think an elf_flags_init field is
8447 written into the object. */
8448 /* BFD_ASSERT (elf_flags_init (ibfd)); */
8449
8450 in_flags = elf_elfheader (ibfd)->e_flags;
8451 out_flags = elf_elfheader (obfd)->e_flags;
8452
8453 /* In theory there is no reason why we couldn't handle this. However
8454 in practice it isn't even close to working and there is no real
8455 reason to want it. */
8456 if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4
8457 && !(ibfd->flags & DYNAMIC)
8458 && (in_flags & EF_ARM_BE8))
8459 {
8460 _bfd_error_handler (_("ERROR: %B is already in final BE8 format"),
8461 ibfd);
8462 return FALSE;
8463 }
8464
8465 if (!elf_flags_init (obfd))
8466 {
8467 /* If the input is the default architecture and had the default
8468 flags then do not bother setting the flags for the output
8469 architecture, instead allow future merges to do this. If no
8470 future merges ever set these flags then they will retain their
8471 uninitialised values, which surprise surprise, correspond
8472 to the default values. */
8473 if (bfd_get_arch_info (ibfd)->the_default
8474 && elf_elfheader (ibfd)->e_flags == 0)
8475 return TRUE;
8476
8477 elf_flags_init (obfd) = TRUE;
8478 elf_elfheader (obfd)->e_flags = in_flags;
8479
8480 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
8481 && bfd_get_arch_info (obfd)->the_default)
8482 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
8483
8484 return TRUE;
8485 }
8486
8487 /* Determine what should happen if the input ARM architecture
8488 does not match the output ARM architecture. */
8489 if (! bfd_arm_merge_machines (ibfd, obfd))
8490 return FALSE;
8491
8492 /* Identical flags must be compatible. */
8493 if (in_flags == out_flags)
8494 return TRUE;
8495
8496 /* Check to see if the input BFD actually contains any sections. If
8497 not, its flags may not have been initialised either, but it
8498 cannot actually cause any incompatiblity. Do not short-circuit
8499 dynamic objects; their section list may be emptied by
8500 elf_link_add_object_symbols.
8501
8502 Also check to see if there are no code sections in the input.
8503 In this case there is no need to check for code specific flags.
8504 XXX - do we need to worry about floating-point format compatability
8505 in data sections ? */
8506 if (!(ibfd->flags & DYNAMIC))
8507 {
8508 bfd_boolean null_input_bfd = TRUE;
8509 bfd_boolean only_data_sections = TRUE;
8510
8511 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8512 {
8513 /* Ignore synthetic glue sections. */
8514 if (strcmp (sec->name, ".glue_7")
8515 && strcmp (sec->name, ".glue_7t"))
8516 {
8517 if ((bfd_get_section_flags (ibfd, sec)
8518 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
8519 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
8520 only_data_sections = FALSE;
8521
8522 null_input_bfd = FALSE;
8523 break;
8524 }
8525 }
8526
8527 if (null_input_bfd || only_data_sections)
8528 return TRUE;
8529 }
8530
8531 /* Complain about various flag mismatches. */
8532 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
8533 EF_ARM_EABI_VERSION (out_flags)))
8534 {
8535 _bfd_error_handler
8536 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
8537 ibfd, obfd,
8538 (in_flags & EF_ARM_EABIMASK) >> 24,
8539 (out_flags & EF_ARM_EABIMASK) >> 24);
8540 return FALSE;
8541 }
8542
8543 /* Not sure what needs to be checked for EABI versions >= 1. */
8544 /* VxWorks libraries do not use these flags. */
8545 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
8546 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
8547 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
8548 {
8549 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
8550 {
8551 _bfd_error_handler
8552 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
8553 ibfd, obfd,
8554 in_flags & EF_ARM_APCS_26 ? 26 : 32,
8555 out_flags & EF_ARM_APCS_26 ? 26 : 32);
8556 flags_compatible = FALSE;
8557 }
8558
8559 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
8560 {
8561 if (in_flags & EF_ARM_APCS_FLOAT)
8562 _bfd_error_handler
8563 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
8564 ibfd, obfd);
8565 else
8566 _bfd_error_handler
8567 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
8568 ibfd, obfd);
8569
8570 flags_compatible = FALSE;
8571 }
8572
8573 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
8574 {
8575 if (in_flags & EF_ARM_VFP_FLOAT)
8576 _bfd_error_handler
8577 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
8578 ibfd, obfd);
8579 else
8580 _bfd_error_handler
8581 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
8582 ibfd, obfd);
8583
8584 flags_compatible = FALSE;
8585 }
8586
8587 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
8588 {
8589 if (in_flags & EF_ARM_MAVERICK_FLOAT)
8590 _bfd_error_handler
8591 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
8592 ibfd, obfd);
8593 else
8594 _bfd_error_handler
8595 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
8596 ibfd, obfd);
8597
8598 flags_compatible = FALSE;
8599 }
8600
8601 #ifdef EF_ARM_SOFT_FLOAT
8602 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
8603 {
8604 /* We can allow interworking between code that is VFP format
8605 layout, and uses either soft float or integer regs for
8606 passing floating point arguments and results. We already
8607 know that the APCS_FLOAT flags match; similarly for VFP
8608 flags. */
8609 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
8610 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
8611 {
8612 if (in_flags & EF_ARM_SOFT_FLOAT)
8613 _bfd_error_handler
8614 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
8615 ibfd, obfd);
8616 else
8617 _bfd_error_handler
8618 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
8619 ibfd, obfd);
8620
8621 flags_compatible = FALSE;
8622 }
8623 }
8624 #endif
8625
8626 /* Interworking mismatch is only a warning. */
8627 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
8628 {
8629 if (in_flags & EF_ARM_INTERWORK)
8630 {
8631 _bfd_error_handler
8632 (_("Warning: %B supports interworking, whereas %B does not"),
8633 ibfd, obfd);
8634 }
8635 else
8636 {
8637 _bfd_error_handler
8638 (_("Warning: %B does not support interworking, whereas %B does"),
8639 ibfd, obfd);
8640 }
8641 }
8642 }
8643
8644 return flags_compatible;
8645 }
8646
8647 /* Display the flags field. */
8648
8649 static bfd_boolean
8650 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
8651 {
8652 FILE * file = (FILE *) ptr;
8653 unsigned long flags;
8654
8655 BFD_ASSERT (abfd != NULL && ptr != NULL);
8656
8657 /* Print normal ELF private data. */
8658 _bfd_elf_print_private_bfd_data (abfd, ptr);
8659
8660 flags = elf_elfheader (abfd)->e_flags;
8661 /* Ignore init flag - it may not be set, despite the flags field
8662 containing valid data. */
8663
8664 /* xgettext:c-format */
8665 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
8666
8667 switch (EF_ARM_EABI_VERSION (flags))
8668 {
8669 case EF_ARM_EABI_UNKNOWN:
8670 /* The following flag bits are GNU extensions and not part of the
8671 official ARM ELF extended ABI. Hence they are only decoded if
8672 the EABI version is not set. */
8673 if (flags & EF_ARM_INTERWORK)
8674 fprintf (file, _(" [interworking enabled]"));
8675
8676 if (flags & EF_ARM_APCS_26)
8677 fprintf (file, " [APCS-26]");
8678 else
8679 fprintf (file, " [APCS-32]");
8680
8681 if (flags & EF_ARM_VFP_FLOAT)
8682 fprintf (file, _(" [VFP float format]"));
8683 else if (flags & EF_ARM_MAVERICK_FLOAT)
8684 fprintf (file, _(" [Maverick float format]"));
8685 else
8686 fprintf (file, _(" [FPA float format]"));
8687
8688 if (flags & EF_ARM_APCS_FLOAT)
8689 fprintf (file, _(" [floats passed in float registers]"));
8690
8691 if (flags & EF_ARM_PIC)
8692 fprintf (file, _(" [position independent]"));
8693
8694 if (flags & EF_ARM_NEW_ABI)
8695 fprintf (file, _(" [new ABI]"));
8696
8697 if (flags & EF_ARM_OLD_ABI)
8698 fprintf (file, _(" [old ABI]"));
8699
8700 if (flags & EF_ARM_SOFT_FLOAT)
8701 fprintf (file, _(" [software FP]"));
8702
8703 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
8704 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
8705 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
8706 | EF_ARM_MAVERICK_FLOAT);
8707 break;
8708
8709 case EF_ARM_EABI_VER1:
8710 fprintf (file, _(" [Version1 EABI]"));
8711
8712 if (flags & EF_ARM_SYMSARESORTED)
8713 fprintf (file, _(" [sorted symbol table]"));
8714 else
8715 fprintf (file, _(" [unsorted symbol table]"));
8716
8717 flags &= ~ EF_ARM_SYMSARESORTED;
8718 break;
8719
8720 case EF_ARM_EABI_VER2:
8721 fprintf (file, _(" [Version2 EABI]"));
8722
8723 if (flags & EF_ARM_SYMSARESORTED)
8724 fprintf (file, _(" [sorted symbol table]"));
8725 else
8726 fprintf (file, _(" [unsorted symbol table]"));
8727
8728 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
8729 fprintf (file, _(" [dynamic symbols use segment index]"));
8730
8731 if (flags & EF_ARM_MAPSYMSFIRST)
8732 fprintf (file, _(" [mapping symbols precede others]"));
8733
8734 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
8735 | EF_ARM_MAPSYMSFIRST);
8736 break;
8737
8738 case EF_ARM_EABI_VER3:
8739 fprintf (file, _(" [Version3 EABI]"));
8740 break;
8741
8742 case EF_ARM_EABI_VER4:
8743 fprintf (file, _(" [Version4 EABI]"));
8744 goto eabi;
8745
8746 case EF_ARM_EABI_VER5:
8747 fprintf (file, _(" [Version5 EABI]"));
8748 eabi:
8749 if (flags & EF_ARM_BE8)
8750 fprintf (file, _(" [BE8]"));
8751
8752 if (flags & EF_ARM_LE8)
8753 fprintf (file, _(" [LE8]"));
8754
8755 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
8756 break;
8757
8758 default:
8759 fprintf (file, _(" <EABI version unrecognised>"));
8760 break;
8761 }
8762
8763 flags &= ~ EF_ARM_EABIMASK;
8764
8765 if (flags & EF_ARM_RELEXEC)
8766 fprintf (file, _(" [relocatable executable]"));
8767
8768 if (flags & EF_ARM_HASENTRY)
8769 fprintf (file, _(" [has entry point]"));
8770
8771 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
8772
8773 if (flags)
8774 fprintf (file, _("<Unrecognised flag bits set>"));
8775
8776 fputc ('\n', file);
8777
8778 return TRUE;
8779 }
8780
8781 static int
8782 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
8783 {
8784 switch (ELF_ST_TYPE (elf_sym->st_info))
8785 {
8786 case STT_ARM_TFUNC:
8787 return ELF_ST_TYPE (elf_sym->st_info);
8788
8789 case STT_ARM_16BIT:
8790 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
8791 This allows us to distinguish between data used by Thumb instructions
8792 and non-data (which is probably code) inside Thumb regions of an
8793 executable. */
8794 if (type != STT_OBJECT && type != STT_TLS)
8795 return ELF_ST_TYPE (elf_sym->st_info);
8796 break;
8797
8798 default:
8799 break;
8800 }
8801
8802 return type;
8803 }
8804
8805 static asection *
8806 elf32_arm_gc_mark_hook (asection *sec,
8807 struct bfd_link_info *info,
8808 Elf_Internal_Rela *rel,
8809 struct elf_link_hash_entry *h,
8810 Elf_Internal_Sym *sym)
8811 {
8812 if (h != NULL)
8813 switch (ELF32_R_TYPE (rel->r_info))
8814 {
8815 case R_ARM_GNU_VTINHERIT:
8816 case R_ARM_GNU_VTENTRY:
8817 return NULL;
8818 }
8819
8820 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
8821 }
8822
8823 /* Update the got entry reference counts for the section being removed. */
8824
8825 static bfd_boolean
8826 elf32_arm_gc_sweep_hook (bfd * abfd,
8827 struct bfd_link_info * info,
8828 asection * sec,
8829 const Elf_Internal_Rela * relocs)
8830 {
8831 Elf_Internal_Shdr *symtab_hdr;
8832 struct elf_link_hash_entry **sym_hashes;
8833 bfd_signed_vma *local_got_refcounts;
8834 const Elf_Internal_Rela *rel, *relend;
8835 struct elf32_arm_link_hash_table * globals;
8836
8837 if (info->relocatable)
8838 return TRUE;
8839
8840 globals = elf32_arm_hash_table (info);
8841
8842 elf_section_data (sec)->local_dynrel = NULL;
8843
8844 symtab_hdr = & elf_symtab_hdr (abfd);
8845 sym_hashes = elf_sym_hashes (abfd);
8846 local_got_refcounts = elf_local_got_refcounts (abfd);
8847
8848 check_use_blx (globals);
8849
8850 relend = relocs + sec->reloc_count;
8851 for (rel = relocs; rel < relend; rel++)
8852 {
8853 unsigned long r_symndx;
8854 struct elf_link_hash_entry *h = NULL;
8855 int r_type;
8856
8857 r_symndx = ELF32_R_SYM (rel->r_info);
8858 if (r_symndx >= symtab_hdr->sh_info)
8859 {
8860 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8861 while (h->root.type == bfd_link_hash_indirect
8862 || h->root.type == bfd_link_hash_warning)
8863 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8864 }
8865
8866 r_type = ELF32_R_TYPE (rel->r_info);
8867 r_type = arm_real_reloc_type (globals, r_type);
8868 switch (r_type)
8869 {
8870 case R_ARM_GOT32:
8871 case R_ARM_GOT_PREL:
8872 case R_ARM_TLS_GD32:
8873 case R_ARM_TLS_IE32:
8874 if (h != NULL)
8875 {
8876 if (h->got.refcount > 0)
8877 h->got.refcount -= 1;
8878 }
8879 else if (local_got_refcounts != NULL)
8880 {
8881 if (local_got_refcounts[r_symndx] > 0)
8882 local_got_refcounts[r_symndx] -= 1;
8883 }
8884 break;
8885
8886 case R_ARM_TLS_LDM32:
8887 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
8888 break;
8889
8890 case R_ARM_ABS32:
8891 case R_ARM_ABS32_NOI:
8892 case R_ARM_REL32:
8893 case R_ARM_REL32_NOI:
8894 case R_ARM_PC24:
8895 case R_ARM_PLT32:
8896 case R_ARM_CALL:
8897 case R_ARM_JUMP24:
8898 case R_ARM_PREL31:
8899 case R_ARM_THM_CALL:
8900 case R_ARM_THM_JUMP24:
8901 case R_ARM_THM_JUMP19:
8902 case R_ARM_MOVW_ABS_NC:
8903 case R_ARM_MOVT_ABS:
8904 case R_ARM_MOVW_PREL_NC:
8905 case R_ARM_MOVT_PREL:
8906 case R_ARM_THM_MOVW_ABS_NC:
8907 case R_ARM_THM_MOVT_ABS:
8908 case R_ARM_THM_MOVW_PREL_NC:
8909 case R_ARM_THM_MOVT_PREL:
8910 /* Should the interworking branches be here also? */
8911
8912 if (h != NULL)
8913 {
8914 struct elf32_arm_link_hash_entry *eh;
8915 struct elf32_arm_relocs_copied **pp;
8916 struct elf32_arm_relocs_copied *p;
8917
8918 eh = (struct elf32_arm_link_hash_entry *) h;
8919
8920 if (h->plt.refcount > 0)
8921 {
8922 h->plt.refcount -= 1;
8923 if (r_type == R_ARM_THM_CALL)
8924 eh->plt_maybe_thumb_refcount--;
8925
8926 if (r_type == R_ARM_THM_JUMP24
8927 || r_type == R_ARM_THM_JUMP19)
8928 eh->plt_thumb_refcount--;
8929 }
8930
8931 if (r_type == R_ARM_ABS32
8932 || r_type == R_ARM_REL32
8933 || r_type == R_ARM_ABS32_NOI
8934 || r_type == R_ARM_REL32_NOI)
8935 {
8936 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
8937 pp = &p->next)
8938 if (p->section == sec)
8939 {
8940 p->count -= 1;
8941 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32
8942 || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI)
8943 p->pc_count -= 1;
8944 if (p->count == 0)
8945 *pp = p->next;
8946 break;
8947 }
8948 }
8949 }
8950 break;
8951
8952 default:
8953 break;
8954 }
8955 }
8956
8957 return TRUE;
8958 }
8959
8960 /* Look through the relocs for a section during the first phase. */
8961
8962 static bfd_boolean
8963 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
8964 asection *sec, const Elf_Internal_Rela *relocs)
8965 {
8966 Elf_Internal_Shdr *symtab_hdr;
8967 struct elf_link_hash_entry **sym_hashes;
8968 const Elf_Internal_Rela *rel;
8969 const Elf_Internal_Rela *rel_end;
8970 bfd *dynobj;
8971 asection *sreloc;
8972 bfd_vma *local_got_offsets;
8973 struct elf32_arm_link_hash_table *htab;
8974 bfd_boolean needs_plt;
8975
8976 if (info->relocatable)
8977 return TRUE;
8978
8979 BFD_ASSERT (is_arm_elf (abfd));
8980
8981 htab = elf32_arm_hash_table (info);
8982 sreloc = NULL;
8983
8984 /* Create dynamic sections for relocatable executables so that we can
8985 copy relocations. */
8986 if (htab->root.is_relocatable_executable
8987 && ! htab->root.dynamic_sections_created)
8988 {
8989 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
8990 return FALSE;
8991 }
8992
8993 dynobj = elf_hash_table (info)->dynobj;
8994 local_got_offsets = elf_local_got_offsets (abfd);
8995
8996 symtab_hdr = & elf_symtab_hdr (abfd);
8997 sym_hashes = elf_sym_hashes (abfd);
8998
8999 rel_end = relocs + sec->reloc_count;
9000 for (rel = relocs; rel < rel_end; rel++)
9001 {
9002 struct elf_link_hash_entry *h;
9003 struct elf32_arm_link_hash_entry *eh;
9004 unsigned long r_symndx;
9005 int r_type;
9006
9007 r_symndx = ELF32_R_SYM (rel->r_info);
9008 r_type = ELF32_R_TYPE (rel->r_info);
9009 r_type = arm_real_reloc_type (htab, r_type);
9010
9011 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
9012 {
9013 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
9014 r_symndx);
9015 return FALSE;
9016 }
9017
9018 if (r_symndx < symtab_hdr->sh_info)
9019 h = NULL;
9020 else
9021 {
9022 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
9023 while (h->root.type == bfd_link_hash_indirect
9024 || h->root.type == bfd_link_hash_warning)
9025 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9026 }
9027
9028 eh = (struct elf32_arm_link_hash_entry *) h;
9029
9030 switch (r_type)
9031 {
9032 case R_ARM_GOT32:
9033 case R_ARM_GOT_PREL:
9034 case R_ARM_TLS_GD32:
9035 case R_ARM_TLS_IE32:
9036 /* This symbol requires a global offset table entry. */
9037 {
9038 int tls_type, old_tls_type;
9039
9040 switch (r_type)
9041 {
9042 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
9043 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
9044 default: tls_type = GOT_NORMAL; break;
9045 }
9046
9047 if (h != NULL)
9048 {
9049 h->got.refcount++;
9050 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
9051 }
9052 else
9053 {
9054 bfd_signed_vma *local_got_refcounts;
9055
9056 /* This is a global offset table entry for a local symbol. */
9057 local_got_refcounts = elf_local_got_refcounts (abfd);
9058 if (local_got_refcounts == NULL)
9059 {
9060 bfd_size_type size;
9061
9062 size = symtab_hdr->sh_info;
9063 size *= (sizeof (bfd_signed_vma) + sizeof (char));
9064 local_got_refcounts = bfd_zalloc (abfd, size);
9065 if (local_got_refcounts == NULL)
9066 return FALSE;
9067 elf_local_got_refcounts (abfd) = local_got_refcounts;
9068 elf32_arm_local_got_tls_type (abfd)
9069 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
9070 }
9071 local_got_refcounts[r_symndx] += 1;
9072 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
9073 }
9074
9075 /* We will already have issued an error message if there is a
9076 TLS / non-TLS mismatch, based on the symbol type. We don't
9077 support any linker relaxations. So just combine any TLS
9078 types needed. */
9079 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
9080 && tls_type != GOT_NORMAL)
9081 tls_type |= old_tls_type;
9082
9083 if (old_tls_type != tls_type)
9084 {
9085 if (h != NULL)
9086 elf32_arm_hash_entry (h)->tls_type = tls_type;
9087 else
9088 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
9089 }
9090 }
9091 /* Fall through. */
9092
9093 case R_ARM_TLS_LDM32:
9094 if (r_type == R_ARM_TLS_LDM32)
9095 htab->tls_ldm_got.refcount++;
9096 /* Fall through. */
9097
9098 case R_ARM_GOTOFF32:
9099 case R_ARM_GOTPC:
9100 if (htab->sgot == NULL)
9101 {
9102 if (htab->root.dynobj == NULL)
9103 htab->root.dynobj = abfd;
9104 if (!create_got_section (htab->root.dynobj, info))
9105 return FALSE;
9106 }
9107 break;
9108
9109 case R_ARM_ABS12:
9110 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
9111 ldr __GOTT_INDEX__ offsets. */
9112 if (!htab->vxworks_p)
9113 break;
9114 /* Fall through. */
9115
9116 case R_ARM_PC24:
9117 case R_ARM_PLT32:
9118 case R_ARM_CALL:
9119 case R_ARM_JUMP24:
9120 case R_ARM_PREL31:
9121 case R_ARM_THM_CALL:
9122 case R_ARM_THM_JUMP24:
9123 case R_ARM_THM_JUMP19:
9124 needs_plt = 1;
9125 goto normal_reloc;
9126
9127 case R_ARM_ABS32:
9128 case R_ARM_ABS32_NOI:
9129 case R_ARM_REL32:
9130 case R_ARM_REL32_NOI:
9131 case R_ARM_MOVW_ABS_NC:
9132 case R_ARM_MOVT_ABS:
9133 case R_ARM_MOVW_PREL_NC:
9134 case R_ARM_MOVT_PREL:
9135 case R_ARM_THM_MOVW_ABS_NC:
9136 case R_ARM_THM_MOVT_ABS:
9137 case R_ARM_THM_MOVW_PREL_NC:
9138 case R_ARM_THM_MOVT_PREL:
9139 needs_plt = 0;
9140 normal_reloc:
9141
9142 /* Should the interworking branches be listed here? */
9143 if (h != NULL)
9144 {
9145 /* If this reloc is in a read-only section, we might
9146 need a copy reloc. We can't check reliably at this
9147 stage whether the section is read-only, as input
9148 sections have not yet been mapped to output sections.
9149 Tentatively set the flag for now, and correct in
9150 adjust_dynamic_symbol. */
9151 if (!info->shared)
9152 h->non_got_ref = 1;
9153
9154 /* We may need a .plt entry if the function this reloc
9155 refers to is in a different object. We can't tell for
9156 sure yet, because something later might force the
9157 symbol local. */
9158 if (needs_plt)
9159 h->needs_plt = 1;
9160
9161 /* If we create a PLT entry, this relocation will reference
9162 it, even if it's an ABS32 relocation. */
9163 h->plt.refcount += 1;
9164
9165 /* It's too early to use htab->use_blx here, so we have to
9166 record possible blx references separately from
9167 relocs that definitely need a thumb stub. */
9168
9169 if (r_type == R_ARM_THM_CALL)
9170 eh->plt_maybe_thumb_refcount += 1;
9171
9172 if (r_type == R_ARM_THM_JUMP24
9173 || r_type == R_ARM_THM_JUMP19)
9174 eh->plt_thumb_refcount += 1;
9175 }
9176
9177 /* If we are creating a shared library or relocatable executable,
9178 and this is a reloc against a global symbol, or a non PC
9179 relative reloc against a local symbol, then we need to copy
9180 the reloc into the shared library. However, if we are linking
9181 with -Bsymbolic, we do not need to copy a reloc against a
9182 global symbol which is defined in an object we are
9183 including in the link (i.e., DEF_REGULAR is set). At
9184 this point we have not seen all the input files, so it is
9185 possible that DEF_REGULAR is not set now but will be set
9186 later (it is never cleared). We account for that
9187 possibility below by storing information in the
9188 relocs_copied field of the hash table entry. */
9189 if ((info->shared || htab->root.is_relocatable_executable)
9190 && (sec->flags & SEC_ALLOC) != 0
9191 && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI)
9192 || (h != NULL && ! h->needs_plt
9193 && (! info->symbolic || ! h->def_regular))))
9194 {
9195 struct elf32_arm_relocs_copied *p, **head;
9196
9197 /* When creating a shared object, we must copy these
9198 reloc types into the output file. We create a reloc
9199 section in dynobj and make room for this reloc. */
9200 if (sreloc == NULL)
9201 {
9202 const char * name;
9203
9204 name = (bfd_elf_string_from_elf_section
9205 (abfd,
9206 elf_elfheader (abfd)->e_shstrndx,
9207 elf_section_data (sec)->rel_hdr.sh_name));
9208 if (name == NULL)
9209 return FALSE;
9210
9211 BFD_ASSERT (reloc_section_p (htab, name, sec));
9212
9213 sreloc = bfd_get_section_by_name (dynobj, name);
9214 if (sreloc == NULL)
9215 {
9216 flagword flags;
9217
9218 flags = (SEC_HAS_CONTENTS | SEC_READONLY
9219 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
9220 if ((sec->flags & SEC_ALLOC) != 0
9221 /* BPABI objects never have dynamic
9222 relocations mapped. */
9223 && !htab->symbian_p)
9224 flags |= SEC_ALLOC | SEC_LOAD;
9225 sreloc = bfd_make_section_with_flags (dynobj,
9226 name,
9227 flags);
9228 if (sreloc == NULL
9229 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
9230 return FALSE;
9231 }
9232
9233 elf_section_data (sec)->sreloc = sreloc;
9234 }
9235
9236 /* If this is a global symbol, we count the number of
9237 relocations we need for this symbol. */
9238 if (h != NULL)
9239 {
9240 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
9241 }
9242 else
9243 {
9244 /* Track dynamic relocs needed for local syms too.
9245 We really need local syms available to do this
9246 easily. Oh well. */
9247
9248 asection *s;
9249 void *vpp;
9250
9251 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
9252 sec, r_symndx);
9253 if (s == NULL)
9254 return FALSE;
9255
9256 vpp = &elf_section_data (s)->local_dynrel;
9257 head = (struct elf32_arm_relocs_copied **) vpp;
9258 }
9259
9260 p = *head;
9261 if (p == NULL || p->section != sec)
9262 {
9263 bfd_size_type amt = sizeof *p;
9264
9265 p = bfd_alloc (htab->root.dynobj, amt);
9266 if (p == NULL)
9267 return FALSE;
9268 p->next = *head;
9269 *head = p;
9270 p->section = sec;
9271 p->count = 0;
9272 p->pc_count = 0;
9273 }
9274
9275 if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)
9276 p->pc_count += 1;
9277 p->count += 1;
9278 }
9279 break;
9280
9281 /* This relocation describes the C++ object vtable hierarchy.
9282 Reconstruct it for later use during GC. */
9283 case R_ARM_GNU_VTINHERIT:
9284 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
9285 return FALSE;
9286 break;
9287
9288 /* This relocation describes which C++ vtable entries are actually
9289 used. Record for later use during GC. */
9290 case R_ARM_GNU_VTENTRY:
9291 BFD_ASSERT (h != NULL);
9292 if (h != NULL
9293 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
9294 return FALSE;
9295 break;
9296 }
9297 }
9298
9299 return TRUE;
9300 }
9301
9302 /* Unwinding tables are not referenced directly. This pass marks them as
9303 required if the corresponding code section is marked. */
9304
9305 static bfd_boolean
9306 elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
9307 elf_gc_mark_hook_fn gc_mark_hook)
9308 {
9309 bfd *sub;
9310 Elf_Internal_Shdr **elf_shdrp;
9311 bfd_boolean again;
9312
9313 /* Marking EH data may cause additional code sections to be marked,
9314 requiring multiple passes. */
9315 again = TRUE;
9316 while (again)
9317 {
9318 again = FALSE;
9319 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
9320 {
9321 asection *o;
9322
9323 if (! is_arm_elf (sub))
9324 continue;
9325
9326 elf_shdrp = elf_elfsections (sub);
9327 for (o = sub->sections; o != NULL; o = o->next)
9328 {
9329 Elf_Internal_Shdr *hdr;
9330
9331 hdr = &elf_section_data (o)->this_hdr;
9332 if (hdr->sh_type == SHT_ARM_EXIDX
9333 && hdr->sh_link
9334 && hdr->sh_link < elf_numsections (sub)
9335 && !o->gc_mark
9336 && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark)
9337 {
9338 again = TRUE;
9339 if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
9340 return FALSE;
9341 }
9342 }
9343 }
9344 }
9345
9346 return TRUE;
9347 }
9348
9349 /* Treat mapping symbols as special target symbols. */
9350
9351 static bfd_boolean
9352 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
9353 {
9354 return bfd_is_arm_special_symbol_name (sym->name,
9355 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
9356 }
9357
9358 /* This is a copy of elf_find_function() from elf.c except that
9359 ARM mapping symbols are ignored when looking for function names
9360 and STT_ARM_TFUNC is considered to a function type. */
9361
9362 static bfd_boolean
9363 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
9364 asection * section,
9365 asymbol ** symbols,
9366 bfd_vma offset,
9367 const char ** filename_ptr,
9368 const char ** functionname_ptr)
9369 {
9370 const char * filename = NULL;
9371 asymbol * func = NULL;
9372 bfd_vma low_func = 0;
9373 asymbol ** p;
9374
9375 for (p = symbols; *p != NULL; p++)
9376 {
9377 elf_symbol_type *q;
9378
9379 q = (elf_symbol_type *) *p;
9380
9381 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
9382 {
9383 default:
9384 break;
9385 case STT_FILE:
9386 filename = bfd_asymbol_name (&q->symbol);
9387 break;
9388 case STT_FUNC:
9389 case STT_ARM_TFUNC:
9390 case STT_NOTYPE:
9391 /* Skip mapping symbols. */
9392 if ((q->symbol.flags & BSF_LOCAL)
9393 && bfd_is_arm_special_symbol_name (q->symbol.name,
9394 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
9395 continue;
9396 /* Fall through. */
9397 if (bfd_get_section (&q->symbol) == section
9398 && q->symbol.value >= low_func
9399 && q->symbol.value <= offset)
9400 {
9401 func = (asymbol *) q;
9402 low_func = q->symbol.value;
9403 }
9404 break;
9405 }
9406 }
9407
9408 if (func == NULL)
9409 return FALSE;
9410
9411 if (filename_ptr)
9412 *filename_ptr = filename;
9413 if (functionname_ptr)
9414 *functionname_ptr = bfd_asymbol_name (func);
9415
9416 return TRUE;
9417 }
9418
9419
9420 /* Find the nearest line to a particular section and offset, for error
9421 reporting. This code is a duplicate of the code in elf.c, except
9422 that it uses arm_elf_find_function. */
9423
9424 static bfd_boolean
9425 elf32_arm_find_nearest_line (bfd * abfd,
9426 asection * section,
9427 asymbol ** symbols,
9428 bfd_vma offset,
9429 const char ** filename_ptr,
9430 const char ** functionname_ptr,
9431 unsigned int * line_ptr)
9432 {
9433 bfd_boolean found = FALSE;
9434
9435 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
9436
9437 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
9438 filename_ptr, functionname_ptr,
9439 line_ptr, 0,
9440 & elf_tdata (abfd)->dwarf2_find_line_info))
9441 {
9442 if (!*functionname_ptr)
9443 arm_elf_find_function (abfd, section, symbols, offset,
9444 *filename_ptr ? NULL : filename_ptr,
9445 functionname_ptr);
9446
9447 return TRUE;
9448 }
9449
9450 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
9451 & found, filename_ptr,
9452 functionname_ptr, line_ptr,
9453 & elf_tdata (abfd)->line_info))
9454 return FALSE;
9455
9456 if (found && (*functionname_ptr || *line_ptr))
9457 return TRUE;
9458
9459 if (symbols == NULL)
9460 return FALSE;
9461
9462 if (! arm_elf_find_function (abfd, section, symbols, offset,
9463 filename_ptr, functionname_ptr))
9464 return FALSE;
9465
9466 *line_ptr = 0;
9467 return TRUE;
9468 }
9469
9470 static bfd_boolean
9471 elf32_arm_find_inliner_info (bfd * abfd,
9472 const char ** filename_ptr,
9473 const char ** functionname_ptr,
9474 unsigned int * line_ptr)
9475 {
9476 bfd_boolean found;
9477 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
9478 functionname_ptr, line_ptr,
9479 & elf_tdata (abfd)->dwarf2_find_line_info);
9480 return found;
9481 }
9482
9483 /* Adjust a symbol defined by a dynamic object and referenced by a
9484 regular object. The current definition is in some section of the
9485 dynamic object, but we're not including those sections. We have to
9486 change the definition to something the rest of the link can
9487 understand. */
9488
9489 static bfd_boolean
9490 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
9491 struct elf_link_hash_entry * h)
9492 {
9493 bfd * dynobj;
9494 asection * s;
9495 struct elf32_arm_link_hash_entry * eh;
9496 struct elf32_arm_link_hash_table *globals;
9497
9498 globals = elf32_arm_hash_table (info);
9499 dynobj = elf_hash_table (info)->dynobj;
9500
9501 /* Make sure we know what is going on here. */
9502 BFD_ASSERT (dynobj != NULL
9503 && (h->needs_plt
9504 || h->u.weakdef != NULL
9505 || (h->def_dynamic
9506 && h->ref_regular
9507 && !h->def_regular)));
9508
9509 eh = (struct elf32_arm_link_hash_entry *) h;
9510
9511 /* If this is a function, put it in the procedure linkage table. We
9512 will fill in the contents of the procedure linkage table later,
9513 when we know the address of the .got section. */
9514 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
9515 || h->needs_plt)
9516 {
9517 if (h->plt.refcount <= 0
9518 || SYMBOL_CALLS_LOCAL (info, h)
9519 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
9520 && h->root.type == bfd_link_hash_undefweak))
9521 {
9522 /* This case can occur if we saw a PLT32 reloc in an input
9523 file, but the symbol was never referred to by a dynamic
9524 object, or if all references were garbage collected. In
9525 such a case, we don't actually need to build a procedure
9526 linkage table, and we can just do a PC24 reloc instead. */
9527 h->plt.offset = (bfd_vma) -1;
9528 eh->plt_thumb_refcount = 0;
9529 eh->plt_maybe_thumb_refcount = 0;
9530 h->needs_plt = 0;
9531 }
9532
9533 return TRUE;
9534 }
9535 else
9536 {
9537 /* It's possible that we incorrectly decided a .plt reloc was
9538 needed for an R_ARM_PC24 or similar reloc to a non-function sym
9539 in check_relocs. We can't decide accurately between function
9540 and non-function syms in check-relocs; Objects loaded later in
9541 the link may change h->type. So fix it now. */
9542 h->plt.offset = (bfd_vma) -1;
9543 eh->plt_thumb_refcount = 0;
9544 eh->plt_maybe_thumb_refcount = 0;
9545 }
9546
9547 /* If this is a weak symbol, and there is a real definition, the
9548 processor independent code will have arranged for us to see the
9549 real definition first, and we can just use the same value. */
9550 if (h->u.weakdef != NULL)
9551 {
9552 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
9553 || h->u.weakdef->root.type == bfd_link_hash_defweak);
9554 h->root.u.def.section = h->u.weakdef->root.u.def.section;
9555 h->root.u.def.value = h->u.weakdef->root.u.def.value;
9556 return TRUE;
9557 }
9558
9559 /* If there are no non-GOT references, we do not need a copy
9560 relocation. */
9561 if (!h->non_got_ref)
9562 return TRUE;
9563
9564 /* This is a reference to a symbol defined by a dynamic object which
9565 is not a function. */
9566
9567 /* If we are creating a shared library, we must presume that the
9568 only references to the symbol are via the global offset table.
9569 For such cases we need not do anything here; the relocations will
9570 be handled correctly by relocate_section. Relocatable executables
9571 can reference data in shared objects directly, so we don't need to
9572 do anything here. */
9573 if (info->shared || globals->root.is_relocatable_executable)
9574 return TRUE;
9575
9576 if (h->size == 0)
9577 {
9578 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
9579 h->root.root.string);
9580 return TRUE;
9581 }
9582
9583 /* We must allocate the symbol in our .dynbss section, which will
9584 become part of the .bss section of the executable. There will be
9585 an entry for this symbol in the .dynsym section. The dynamic
9586 object will contain position independent code, so all references
9587 from the dynamic object to this symbol will go through the global
9588 offset table. The dynamic linker will use the .dynsym entry to
9589 determine the address it must put in the global offset table, so
9590 both the dynamic object and the regular object will refer to the
9591 same memory location for the variable. */
9592 s = bfd_get_section_by_name (dynobj, ".dynbss");
9593 BFD_ASSERT (s != NULL);
9594
9595 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
9596 copy the initial value out of the dynamic object and into the
9597 runtime process image. We need to remember the offset into the
9598 .rel(a).bss section we are going to use. */
9599 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
9600 {
9601 asection *srel;
9602
9603 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
9604 BFD_ASSERT (srel != NULL);
9605 srel->size += RELOC_SIZE (globals);
9606 h->needs_copy = 1;
9607 }
9608
9609 return _bfd_elf_adjust_dynamic_copy (h, s);
9610 }
9611
9612 /* Allocate space in .plt, .got and associated reloc sections for
9613 dynamic relocs. */
9614
9615 static bfd_boolean
9616 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
9617 {
9618 struct bfd_link_info *info;
9619 struct elf32_arm_link_hash_table *htab;
9620 struct elf32_arm_link_hash_entry *eh;
9621 struct elf32_arm_relocs_copied *p;
9622 bfd_signed_vma thumb_refs;
9623
9624 eh = (struct elf32_arm_link_hash_entry *) h;
9625
9626 if (h->root.type == bfd_link_hash_indirect)
9627 return TRUE;
9628
9629 if (h->root.type == bfd_link_hash_warning)
9630 /* When warning symbols are created, they **replace** the "real"
9631 entry in the hash table, thus we never get to see the real
9632 symbol in a hash traversal. So look at it now. */
9633 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9634
9635 info = (struct bfd_link_info *) inf;
9636 htab = elf32_arm_hash_table (info);
9637
9638 if (htab->root.dynamic_sections_created
9639 && h->plt.refcount > 0)
9640 {
9641 /* Make sure this symbol is output as a dynamic symbol.
9642 Undefined weak syms won't yet be marked as dynamic. */
9643 if (h->dynindx == -1
9644 && !h->forced_local)
9645 {
9646 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9647 return FALSE;
9648 }
9649
9650 if (info->shared
9651 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
9652 {
9653 asection *s = htab->splt;
9654
9655 /* If this is the first .plt entry, make room for the special
9656 first entry. */
9657 if (s->size == 0)
9658 s->size += htab->plt_header_size;
9659
9660 h->plt.offset = s->size;
9661
9662 /* If we will insert a Thumb trampoline before this PLT, leave room
9663 for it. */
9664 thumb_refs = eh->plt_thumb_refcount;
9665 if (!htab->use_blx)
9666 thumb_refs += eh->plt_maybe_thumb_refcount;
9667
9668 if (thumb_refs > 0)
9669 {
9670 h->plt.offset += PLT_THUMB_STUB_SIZE;
9671 s->size += PLT_THUMB_STUB_SIZE;
9672 }
9673
9674 /* If this symbol is not defined in a regular file, and we are
9675 not generating a shared library, then set the symbol to this
9676 location in the .plt. This is required to make function
9677 pointers compare as equal between the normal executable and
9678 the shared library. */
9679 if (! info->shared
9680 && !h->def_regular)
9681 {
9682 h->root.u.def.section = s;
9683 h->root.u.def.value = h->plt.offset;
9684
9685 /* Make sure the function is not marked as Thumb, in case
9686 it is the target of an ABS32 relocation, which will
9687 point to the PLT entry. */
9688 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
9689 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
9690 }
9691
9692 /* Make room for this entry. */
9693 s->size += htab->plt_entry_size;
9694
9695 if (!htab->symbian_p)
9696 {
9697 /* We also need to make an entry in the .got.plt section, which
9698 will be placed in the .got section by the linker script. */
9699 eh->plt_got_offset = htab->sgotplt->size;
9700 htab->sgotplt->size += 4;
9701 }
9702
9703 /* We also need to make an entry in the .rel(a).plt section. */
9704 htab->srelplt->size += RELOC_SIZE (htab);
9705
9706 /* VxWorks executables have a second set of relocations for
9707 each PLT entry. They go in a separate relocation section,
9708 which is processed by the kernel loader. */
9709 if (htab->vxworks_p && !info->shared)
9710 {
9711 /* There is a relocation for the initial PLT entry:
9712 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
9713 if (h->plt.offset == htab->plt_header_size)
9714 htab->srelplt2->size += RELOC_SIZE (htab);
9715
9716 /* There are two extra relocations for each subsequent
9717 PLT entry: an R_ARM_32 relocation for the GOT entry,
9718 and an R_ARM_32 relocation for the PLT entry. */
9719 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
9720 }
9721 }
9722 else
9723 {
9724 h->plt.offset = (bfd_vma) -1;
9725 h->needs_plt = 0;
9726 }
9727 }
9728 else
9729 {
9730 h->plt.offset = (bfd_vma) -1;
9731 h->needs_plt = 0;
9732 }
9733
9734 if (h->got.refcount > 0)
9735 {
9736 asection *s;
9737 bfd_boolean dyn;
9738 int tls_type = elf32_arm_hash_entry (h)->tls_type;
9739 int indx;
9740
9741 /* Make sure this symbol is output as a dynamic symbol.
9742 Undefined weak syms won't yet be marked as dynamic. */
9743 if (h->dynindx == -1
9744 && !h->forced_local)
9745 {
9746 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9747 return FALSE;
9748 }
9749
9750 if (!htab->symbian_p)
9751 {
9752 s = htab->sgot;
9753 h->got.offset = s->size;
9754
9755 if (tls_type == GOT_UNKNOWN)
9756 abort ();
9757
9758 if (tls_type == GOT_NORMAL)
9759 /* Non-TLS symbols need one GOT slot. */
9760 s->size += 4;
9761 else
9762 {
9763 if (tls_type & GOT_TLS_GD)
9764 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
9765 s->size += 8;
9766 if (tls_type & GOT_TLS_IE)
9767 /* R_ARM_TLS_IE32 needs one GOT slot. */
9768 s->size += 4;
9769 }
9770
9771 dyn = htab->root.dynamic_sections_created;
9772
9773 indx = 0;
9774 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
9775 && (!info->shared
9776 || !SYMBOL_REFERENCES_LOCAL (info, h)))
9777 indx = h->dynindx;
9778
9779 if (tls_type != GOT_NORMAL
9780 && (info->shared || indx != 0)
9781 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9782 || h->root.type != bfd_link_hash_undefweak))
9783 {
9784 if (tls_type & GOT_TLS_IE)
9785 htab->srelgot->size += RELOC_SIZE (htab);
9786
9787 if (tls_type & GOT_TLS_GD)
9788 htab->srelgot->size += RELOC_SIZE (htab);
9789
9790 if ((tls_type & GOT_TLS_GD) && indx != 0)
9791 htab->srelgot->size += RELOC_SIZE (htab);
9792 }
9793 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9794 || h->root.type != bfd_link_hash_undefweak)
9795 && (info->shared
9796 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
9797 htab->srelgot->size += RELOC_SIZE (htab);
9798 }
9799 }
9800 else
9801 h->got.offset = (bfd_vma) -1;
9802
9803 /* Allocate stubs for exported Thumb functions on v4t. */
9804 if (!htab->use_blx && h->dynindx != -1
9805 && h->def_regular
9806 && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC
9807 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9808 {
9809 struct elf_link_hash_entry * th;
9810 struct bfd_link_hash_entry * bh;
9811 struct elf_link_hash_entry * myh;
9812 char name[1024];
9813 asection *s;
9814 bh = NULL;
9815 /* Create a new symbol to regist the real location of the function. */
9816 s = h->root.u.def.section;
9817 sprintf (name, "__real_%s", h->root.root.string);
9818 _bfd_generic_link_add_one_symbol (info, s->owner,
9819 name, BSF_GLOBAL, s,
9820 h->root.u.def.value,
9821 NULL, TRUE, FALSE, &bh);
9822
9823 myh = (struct elf_link_hash_entry *) bh;
9824 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
9825 myh->forced_local = 1;
9826 eh->export_glue = myh;
9827 th = record_arm_to_thumb_glue (info, h);
9828 /* Point the symbol at the stub. */
9829 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
9830 h->root.u.def.section = th->root.u.def.section;
9831 h->root.u.def.value = th->root.u.def.value & ~1;
9832 }
9833
9834 if (eh->relocs_copied == NULL)
9835 return TRUE;
9836
9837 /* In the shared -Bsymbolic case, discard space allocated for
9838 dynamic pc-relative relocs against symbols which turn out to be
9839 defined in regular objects. For the normal shared case, discard
9840 space for pc-relative relocs that have become local due to symbol
9841 visibility changes. */
9842
9843 if (info->shared || htab->root.is_relocatable_executable)
9844 {
9845 /* The only relocs that use pc_count are R_ARM_REL32 and
9846 R_ARM_REL32_NOI, which will appear on something like
9847 ".long foo - .". We want calls to protected symbols to resolve
9848 directly to the function rather than going via the plt. If people
9849 want function pointer comparisons to work as expected then they
9850 should avoid writing assembly like ".long foo - .". */
9851 if (SYMBOL_CALLS_LOCAL (info, h))
9852 {
9853 struct elf32_arm_relocs_copied **pp;
9854
9855 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
9856 {
9857 p->count -= p->pc_count;
9858 p->pc_count = 0;
9859 if (p->count == 0)
9860 *pp = p->next;
9861 else
9862 pp = &p->next;
9863 }
9864 }
9865
9866 if (elf32_arm_hash_table (info)->vxworks_p)
9867 {
9868 struct elf32_arm_relocs_copied **pp;
9869
9870 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
9871 {
9872 if (strcmp (p->section->output_section->name, ".tls_vars") == 0)
9873 *pp = p->next;
9874 else
9875 pp = &p->next;
9876 }
9877 }
9878
9879 /* Also discard relocs on undefined weak syms with non-default
9880 visibility. */
9881 if (eh->relocs_copied != NULL
9882 && h->root.type == bfd_link_hash_undefweak)
9883 {
9884 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9885 eh->relocs_copied = NULL;
9886
9887 /* Make sure undefined weak symbols are output as a dynamic
9888 symbol in PIEs. */
9889 else if (h->dynindx == -1
9890 && !h->forced_local)
9891 {
9892 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9893 return FALSE;
9894 }
9895 }
9896
9897 else if (htab->root.is_relocatable_executable && h->dynindx == -1
9898 && h->root.type == bfd_link_hash_new)
9899 {
9900 /* Output absolute symbols so that we can create relocations
9901 against them. For normal symbols we output a relocation
9902 against the section that contains them. */
9903 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9904 return FALSE;
9905 }
9906
9907 }
9908 else
9909 {
9910 /* For the non-shared case, discard space for relocs against
9911 symbols which turn out to need copy relocs or are not
9912 dynamic. */
9913
9914 if (!h->non_got_ref
9915 && ((h->def_dynamic
9916 && !h->def_regular)
9917 || (htab->root.dynamic_sections_created
9918 && (h->root.type == bfd_link_hash_undefweak
9919 || h->root.type == bfd_link_hash_undefined))))
9920 {
9921 /* Make sure this symbol is output as a dynamic symbol.
9922 Undefined weak syms won't yet be marked as dynamic. */
9923 if (h->dynindx == -1
9924 && !h->forced_local)
9925 {
9926 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9927 return FALSE;
9928 }
9929
9930 /* If that succeeded, we know we'll be keeping all the
9931 relocs. */
9932 if (h->dynindx != -1)
9933 goto keep;
9934 }
9935
9936 eh->relocs_copied = NULL;
9937
9938 keep: ;
9939 }
9940
9941 /* Finally, allocate space. */
9942 for (p = eh->relocs_copied; p != NULL; p = p->next)
9943 {
9944 asection *sreloc = elf_section_data (p->section)->sreloc;
9945 sreloc->size += p->count * RELOC_SIZE (htab);
9946 }
9947
9948 return TRUE;
9949 }
9950
9951 /* Find any dynamic relocs that apply to read-only sections. */
9952
9953 static bfd_boolean
9954 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
9955 {
9956 struct elf32_arm_link_hash_entry * eh;
9957 struct elf32_arm_relocs_copied * p;
9958
9959 if (h->root.type == bfd_link_hash_warning)
9960 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9961
9962 eh = (struct elf32_arm_link_hash_entry *) h;
9963 for (p = eh->relocs_copied; p != NULL; p = p->next)
9964 {
9965 asection *s = p->section;
9966
9967 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9968 {
9969 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9970
9971 info->flags |= DF_TEXTREL;
9972
9973 /* Not an error, just cut short the traversal. */
9974 return FALSE;
9975 }
9976 }
9977 return TRUE;
9978 }
9979
9980 void
9981 bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info,
9982 int byteswap_code)
9983 {
9984 struct elf32_arm_link_hash_table *globals;
9985
9986 globals = elf32_arm_hash_table (info);
9987 globals->byteswap_code = byteswap_code;
9988 }
9989
9990 /* Set the sizes of the dynamic sections. */
9991
9992 static bfd_boolean
9993 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
9994 struct bfd_link_info * info)
9995 {
9996 bfd * dynobj;
9997 asection * s;
9998 bfd_boolean plt;
9999 bfd_boolean relocs;
10000 bfd *ibfd;
10001 struct elf32_arm_link_hash_table *htab;
10002
10003 htab = elf32_arm_hash_table (info);
10004 dynobj = elf_hash_table (info)->dynobj;
10005 BFD_ASSERT (dynobj != NULL);
10006 check_use_blx (htab);
10007
10008 if (elf_hash_table (info)->dynamic_sections_created)
10009 {
10010 /* Set the contents of the .interp section to the interpreter. */
10011 if (info->executable)
10012 {
10013 s = bfd_get_section_by_name (dynobj, ".interp");
10014 BFD_ASSERT (s != NULL);
10015 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10016 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10017 }
10018 }
10019
10020 /* Set up .got offsets for local syms, and space for local dynamic
10021 relocs. */
10022 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10023 {
10024 bfd_signed_vma *local_got;
10025 bfd_signed_vma *end_local_got;
10026 char *local_tls_type;
10027 bfd_size_type locsymcount;
10028 Elf_Internal_Shdr *symtab_hdr;
10029 asection *srel;
10030 bfd_boolean is_vxworks = elf32_arm_hash_table (info)->vxworks_p;
10031
10032 if (! is_arm_elf (ibfd))
10033 continue;
10034
10035 for (s = ibfd->sections; s != NULL; s = s->next)
10036 {
10037 struct elf32_arm_relocs_copied *p;
10038
10039 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10040 {
10041 if (!bfd_is_abs_section (p->section)
10042 && bfd_is_abs_section (p->section->output_section))
10043 {
10044 /* Input section has been discarded, either because
10045 it is a copy of a linkonce section or due to
10046 linker script /DISCARD/, so we'll be discarding
10047 the relocs too. */
10048 }
10049 else if (is_vxworks
10050 && strcmp (p->section->output_section->name,
10051 ".tls_vars") == 0)
10052 {
10053 /* Relocations in vxworks .tls_vars sections are
10054 handled specially by the loader. */
10055 }
10056 else if (p->count != 0)
10057 {
10058 srel = elf_section_data (p->section)->sreloc;
10059 srel->size += p->count * RELOC_SIZE (htab);
10060 if ((p->section->output_section->flags & SEC_READONLY) != 0)
10061 info->flags |= DF_TEXTREL;
10062 }
10063 }
10064 }
10065
10066 local_got = elf_local_got_refcounts (ibfd);
10067 if (!local_got)
10068 continue;
10069
10070 symtab_hdr = & elf_symtab_hdr (ibfd);
10071 locsymcount = symtab_hdr->sh_info;
10072 end_local_got = local_got + locsymcount;
10073 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
10074 s = htab->sgot;
10075 srel = htab->srelgot;
10076 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
10077 {
10078 if (*local_got > 0)
10079 {
10080 *local_got = s->size;
10081 if (*local_tls_type & GOT_TLS_GD)
10082 /* TLS_GD relocs need an 8-byte structure in the GOT. */
10083 s->size += 8;
10084 if (*local_tls_type & GOT_TLS_IE)
10085 s->size += 4;
10086 if (*local_tls_type == GOT_NORMAL)
10087 s->size += 4;
10088
10089 if (info->shared || *local_tls_type == GOT_TLS_GD)
10090 srel->size += RELOC_SIZE (htab);
10091 }
10092 else
10093 *local_got = (bfd_vma) -1;
10094 }
10095 }
10096
10097 if (htab->tls_ldm_got.refcount > 0)
10098 {
10099 /* Allocate two GOT entries and one dynamic relocation (if necessary)
10100 for R_ARM_TLS_LDM32 relocations. */
10101 htab->tls_ldm_got.offset = htab->sgot->size;
10102 htab->sgot->size += 8;
10103 if (info->shared)
10104 htab->srelgot->size += RELOC_SIZE (htab);
10105 }
10106 else
10107 htab->tls_ldm_got.offset = -1;
10108
10109 /* Allocate global sym .plt and .got entries, and space for global
10110 sym dynamic relocs. */
10111 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
10112
10113 /* Here we rummage through the found bfds to collect glue information. */
10114 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10115 {
10116 if (! is_arm_elf (ibfd))
10117 continue;
10118
10119 /* Initialise mapping tables for code/data. */
10120 bfd_elf32_arm_init_maps (ibfd);
10121
10122 if (!bfd_elf32_arm_process_before_allocation (ibfd, info)
10123 || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info))
10124 /* xgettext:c-format */
10125 _bfd_error_handler (_("Errors encountered processing file %s"),
10126 ibfd->filename);
10127 }
10128
10129 /* The check_relocs and adjust_dynamic_symbol entry points have
10130 determined the sizes of the various dynamic sections. Allocate
10131 memory for them. */
10132 plt = FALSE;
10133 relocs = FALSE;
10134 for (s = dynobj->sections; s != NULL; s = s->next)
10135 {
10136 const char * name;
10137
10138 if ((s->flags & SEC_LINKER_CREATED) == 0)
10139 continue;
10140
10141 /* It's OK to base decisions on the section name, because none
10142 of the dynobj section names depend upon the input files. */
10143 name = bfd_get_section_name (dynobj, s);
10144
10145 if (strcmp (name, ".plt") == 0)
10146 {
10147 /* Remember whether there is a PLT. */
10148 plt = s->size != 0;
10149 }
10150 else if (CONST_STRNEQ (name, ".rel"))
10151 {
10152 if (s->size != 0)
10153 {
10154 /* Remember whether there are any reloc sections other
10155 than .rel(a).plt and .rela.plt.unloaded. */
10156 if (s != htab->srelplt && s != htab->srelplt2)
10157 relocs = TRUE;
10158
10159 /* We use the reloc_count field as a counter if we need
10160 to copy relocs into the output file. */
10161 s->reloc_count = 0;
10162 }
10163 }
10164 else if (! CONST_STRNEQ (name, ".got")
10165 && strcmp (name, ".dynbss") != 0)
10166 {
10167 /* It's not one of our sections, so don't allocate space. */
10168 continue;
10169 }
10170
10171 if (s->size == 0)
10172 {
10173 /* If we don't need this section, strip it from the
10174 output file. This is mostly to handle .rel(a).bss and
10175 .rel(a).plt. We must create both sections in
10176 create_dynamic_sections, because they must be created
10177 before the linker maps input sections to output
10178 sections. The linker does that before
10179 adjust_dynamic_symbol is called, and it is that
10180 function which decides whether anything needs to go
10181 into these sections. */
10182 s->flags |= SEC_EXCLUDE;
10183 continue;
10184 }
10185
10186 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10187 continue;
10188
10189 /* Allocate memory for the section contents. */
10190 s->contents = bfd_zalloc (dynobj, s->size);
10191 if (s->contents == NULL)
10192 return FALSE;
10193 }
10194
10195 if (elf_hash_table (info)->dynamic_sections_created)
10196 {
10197 /* Add some entries to the .dynamic section. We fill in the
10198 values later, in elf32_arm_finish_dynamic_sections, but we
10199 must add the entries now so that we get the correct size for
10200 the .dynamic section. The DT_DEBUG entry is filled in by the
10201 dynamic linker and used by the debugger. */
10202 #define add_dynamic_entry(TAG, VAL) \
10203 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10204
10205 if (info->executable)
10206 {
10207 if (!add_dynamic_entry (DT_DEBUG, 0))
10208 return FALSE;
10209 }
10210
10211 if (plt)
10212 {
10213 if ( !add_dynamic_entry (DT_PLTGOT, 0)
10214 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10215 || !add_dynamic_entry (DT_PLTREL,
10216 htab->use_rel ? DT_REL : DT_RELA)
10217 || !add_dynamic_entry (DT_JMPREL, 0))
10218 return FALSE;
10219 }
10220
10221 if (relocs)
10222 {
10223 if (htab->use_rel)
10224 {
10225 if (!add_dynamic_entry (DT_REL, 0)
10226 || !add_dynamic_entry (DT_RELSZ, 0)
10227 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
10228 return FALSE;
10229 }
10230 else
10231 {
10232 if (!add_dynamic_entry (DT_RELA, 0)
10233 || !add_dynamic_entry (DT_RELASZ, 0)
10234 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
10235 return FALSE;
10236 }
10237 }
10238
10239 /* If any dynamic relocs apply to a read-only section,
10240 then we need a DT_TEXTREL entry. */
10241 if ((info->flags & DF_TEXTREL) == 0)
10242 elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs,
10243 info);
10244
10245 if ((info->flags & DF_TEXTREL) != 0)
10246 {
10247 if (!add_dynamic_entry (DT_TEXTREL, 0))
10248 return FALSE;
10249 }
10250 if (htab->vxworks_p
10251 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
10252 return FALSE;
10253 }
10254 #undef add_dynamic_entry
10255
10256 return TRUE;
10257 }
10258
10259 /* Finish up dynamic symbol handling. We set the contents of various
10260 dynamic sections here. */
10261
10262 static bfd_boolean
10263 elf32_arm_finish_dynamic_symbol (bfd * output_bfd,
10264 struct bfd_link_info * info,
10265 struct elf_link_hash_entry * h,
10266 Elf_Internal_Sym * sym)
10267 {
10268 bfd * dynobj;
10269 struct elf32_arm_link_hash_table *htab;
10270 struct elf32_arm_link_hash_entry *eh;
10271
10272 dynobj = elf_hash_table (info)->dynobj;
10273 htab = elf32_arm_hash_table (info);
10274 eh = (struct elf32_arm_link_hash_entry *) h;
10275
10276 if (h->plt.offset != (bfd_vma) -1)
10277 {
10278 asection * splt;
10279 asection * srel;
10280 bfd_byte *loc;
10281 bfd_vma plt_index;
10282 Elf_Internal_Rela rel;
10283
10284 /* This symbol has an entry in the procedure linkage table. Set
10285 it up. */
10286
10287 BFD_ASSERT (h->dynindx != -1);
10288
10289 splt = bfd_get_section_by_name (dynobj, ".plt");
10290 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
10291 BFD_ASSERT (splt != NULL && srel != NULL);
10292
10293 /* Fill in the entry in the procedure linkage table. */
10294 if (htab->symbian_p)
10295 {
10296 put_arm_insn (htab, output_bfd,
10297 elf32_arm_symbian_plt_entry[0],
10298 splt->contents + h->plt.offset);
10299 bfd_put_32 (output_bfd,
10300 elf32_arm_symbian_plt_entry[1],
10301 splt->contents + h->plt.offset + 4);
10302
10303 /* Fill in the entry in the .rel.plt section. */
10304 rel.r_offset = (splt->output_section->vma
10305 + splt->output_offset
10306 + h->plt.offset + 4);
10307 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10308
10309 /* Get the index in the procedure linkage table which
10310 corresponds to this symbol. This is the index of this symbol
10311 in all the symbols for which we are making plt entries. The
10312 first entry in the procedure linkage table is reserved. */
10313 plt_index = ((h->plt.offset - htab->plt_header_size)
10314 / htab->plt_entry_size);
10315 }
10316 else
10317 {
10318 bfd_vma got_offset, got_address, plt_address;
10319 bfd_vma got_displacement;
10320 asection * sgot;
10321 bfd_byte * ptr;
10322
10323 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
10324 BFD_ASSERT (sgot != NULL);
10325
10326 /* Get the offset into the .got.plt table of the entry that
10327 corresponds to this function. */
10328 got_offset = eh->plt_got_offset;
10329
10330 /* Get the index in the procedure linkage table which
10331 corresponds to this symbol. This is the index of this symbol
10332 in all the symbols for which we are making plt entries. The
10333 first three entries in .got.plt are reserved; after that
10334 symbols appear in the same order as in .plt. */
10335 plt_index = (got_offset - 12) / 4;
10336
10337 /* Calculate the address of the GOT entry. */
10338 got_address = (sgot->output_section->vma
10339 + sgot->output_offset
10340 + got_offset);
10341
10342 /* ...and the address of the PLT entry. */
10343 plt_address = (splt->output_section->vma
10344 + splt->output_offset
10345 + h->plt.offset);
10346
10347 ptr = htab->splt->contents + h->plt.offset;
10348 if (htab->vxworks_p && info->shared)
10349 {
10350 unsigned int i;
10351 bfd_vma val;
10352
10353 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
10354 {
10355 val = elf32_arm_vxworks_shared_plt_entry[i];
10356 if (i == 2)
10357 val |= got_address - sgot->output_section->vma;
10358 if (i == 5)
10359 val |= plt_index * RELOC_SIZE (htab);
10360 if (i == 2 || i == 5)
10361 bfd_put_32 (output_bfd, val, ptr);
10362 else
10363 put_arm_insn (htab, output_bfd, val, ptr);
10364 }
10365 }
10366 else if (htab->vxworks_p)
10367 {
10368 unsigned int i;
10369 bfd_vma val;
10370
10371 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
10372 {
10373 val = elf32_arm_vxworks_exec_plt_entry[i];
10374 if (i == 2)
10375 val |= got_address;
10376 if (i == 4)
10377 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
10378 if (i == 5)
10379 val |= plt_index * RELOC_SIZE (htab);
10380 if (i == 2 || i == 5)
10381 bfd_put_32 (output_bfd, val, ptr);
10382 else
10383 put_arm_insn (htab, output_bfd, val, ptr);
10384 }
10385
10386 loc = (htab->srelplt2->contents
10387 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
10388
10389 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
10390 referencing the GOT for this PLT entry. */
10391 rel.r_offset = plt_address + 8;
10392 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10393 rel.r_addend = got_offset;
10394 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10395 loc += RELOC_SIZE (htab);
10396
10397 /* Create the R_ARM_ABS32 relocation referencing the
10398 beginning of the PLT for this GOT entry. */
10399 rel.r_offset = got_address;
10400 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
10401 rel.r_addend = 0;
10402 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10403 }
10404 else
10405 {
10406 bfd_signed_vma thumb_refs;
10407 /* Calculate the displacement between the PLT slot and the
10408 entry in the GOT. The eight-byte offset accounts for the
10409 value produced by adding to pc in the first instruction
10410 of the PLT stub. */
10411 got_displacement = got_address - (plt_address + 8);
10412
10413 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
10414
10415 thumb_refs = eh->plt_thumb_refcount;
10416 if (!htab->use_blx)
10417 thumb_refs += eh->plt_maybe_thumb_refcount;
10418
10419 if (thumb_refs > 0)
10420 {
10421 put_thumb_insn (htab, output_bfd,
10422 elf32_arm_plt_thumb_stub[0], ptr - 4);
10423 put_thumb_insn (htab, output_bfd,
10424 elf32_arm_plt_thumb_stub[1], ptr - 2);
10425 }
10426
10427 put_arm_insn (htab, output_bfd,
10428 elf32_arm_plt_entry[0]
10429 | ((got_displacement & 0x0ff00000) >> 20),
10430 ptr + 0);
10431 put_arm_insn (htab, output_bfd,
10432 elf32_arm_plt_entry[1]
10433 | ((got_displacement & 0x000ff000) >> 12),
10434 ptr+ 4);
10435 put_arm_insn (htab, output_bfd,
10436 elf32_arm_plt_entry[2]
10437 | (got_displacement & 0x00000fff),
10438 ptr + 8);
10439 #ifdef FOUR_WORD_PLT
10440 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
10441 #endif
10442 }
10443
10444 /* Fill in the entry in the global offset table. */
10445 bfd_put_32 (output_bfd,
10446 (splt->output_section->vma
10447 + splt->output_offset),
10448 sgot->contents + got_offset);
10449
10450 /* Fill in the entry in the .rel(a).plt section. */
10451 rel.r_addend = 0;
10452 rel.r_offset = got_address;
10453 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
10454 }
10455
10456 loc = srel->contents + plt_index * RELOC_SIZE (htab);
10457 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10458
10459 if (!h->def_regular)
10460 {
10461 /* Mark the symbol as undefined, rather than as defined in
10462 the .plt section. Leave the value alone. */
10463 sym->st_shndx = SHN_UNDEF;
10464 /* If the symbol is weak, we do need to clear the value.
10465 Otherwise, the PLT entry would provide a definition for
10466 the symbol even if the symbol wasn't defined anywhere,
10467 and so the symbol would never be NULL. */
10468 if (!h->ref_regular_nonweak)
10469 sym->st_value = 0;
10470 }
10471 }
10472
10473 if (h->got.offset != (bfd_vma) -1
10474 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
10475 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
10476 {
10477 asection * sgot;
10478 asection * srel;
10479 Elf_Internal_Rela rel;
10480 bfd_byte *loc;
10481 bfd_vma offset;
10482
10483 /* This symbol has an entry in the global offset table. Set it
10484 up. */
10485 sgot = bfd_get_section_by_name (dynobj, ".got");
10486 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
10487 BFD_ASSERT (sgot != NULL && srel != NULL);
10488
10489 offset = (h->got.offset & ~(bfd_vma) 1);
10490 rel.r_addend = 0;
10491 rel.r_offset = (sgot->output_section->vma
10492 + sgot->output_offset
10493 + offset);
10494
10495 /* If this is a static link, or it is a -Bsymbolic link and the
10496 symbol is defined locally or was forced to be local because
10497 of a version file, we just want to emit a RELATIVE reloc.
10498 The entry in the global offset table will already have been
10499 initialized in the relocate_section function. */
10500 if (info->shared
10501 && SYMBOL_REFERENCES_LOCAL (info, h))
10502 {
10503 BFD_ASSERT ((h->got.offset & 1) != 0);
10504 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
10505 if (!htab->use_rel)
10506 {
10507 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
10508 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
10509 }
10510 }
10511 else
10512 {
10513 BFD_ASSERT ((h->got.offset & 1) == 0);
10514 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
10515 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
10516 }
10517
10518 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
10519 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10520 }
10521
10522 if (h->needs_copy)
10523 {
10524 asection * s;
10525 Elf_Internal_Rela rel;
10526 bfd_byte *loc;
10527
10528 /* This symbol needs a copy reloc. Set it up. */
10529 BFD_ASSERT (h->dynindx != -1
10530 && (h->root.type == bfd_link_hash_defined
10531 || h->root.type == bfd_link_hash_defweak));
10532
10533 s = bfd_get_section_by_name (h->root.u.def.section->owner,
10534 RELOC_SECTION (htab, ".bss"));
10535 BFD_ASSERT (s != NULL);
10536
10537 rel.r_addend = 0;
10538 rel.r_offset = (h->root.u.def.value
10539 + h->root.u.def.section->output_section->vma
10540 + h->root.u.def.section->output_offset);
10541 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
10542 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
10543 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
10544 }
10545
10546 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
10547 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
10548 to the ".got" section. */
10549 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
10550 || (!htab->vxworks_p && h == htab->root.hgot))
10551 sym->st_shndx = SHN_ABS;
10552
10553 return TRUE;
10554 }
10555
10556 /* Finish up the dynamic sections. */
10557
10558 static bfd_boolean
10559 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
10560 {
10561 bfd * dynobj;
10562 asection * sgot;
10563 asection * sdyn;
10564
10565 dynobj = elf_hash_table (info)->dynobj;
10566
10567 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
10568 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
10569 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10570
10571 if (elf_hash_table (info)->dynamic_sections_created)
10572 {
10573 asection *splt;
10574 Elf32_External_Dyn *dyncon, *dynconend;
10575 struct elf32_arm_link_hash_table *htab;
10576
10577 htab = elf32_arm_hash_table (info);
10578 splt = bfd_get_section_by_name (dynobj, ".plt");
10579 BFD_ASSERT (splt != NULL && sdyn != NULL);
10580
10581 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10582 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10583
10584 for (; dyncon < dynconend; dyncon++)
10585 {
10586 Elf_Internal_Dyn dyn;
10587 const char * name;
10588 asection * s;
10589
10590 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10591
10592 switch (dyn.d_tag)
10593 {
10594 unsigned int type;
10595
10596 default:
10597 if (htab->vxworks_p
10598 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10599 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10600 break;
10601
10602 case DT_HASH:
10603 name = ".hash";
10604 goto get_vma_if_bpabi;
10605 case DT_STRTAB:
10606 name = ".dynstr";
10607 goto get_vma_if_bpabi;
10608 case DT_SYMTAB:
10609 name = ".dynsym";
10610 goto get_vma_if_bpabi;
10611 case DT_VERSYM:
10612 name = ".gnu.version";
10613 goto get_vma_if_bpabi;
10614 case DT_VERDEF:
10615 name = ".gnu.version_d";
10616 goto get_vma_if_bpabi;
10617 case DT_VERNEED:
10618 name = ".gnu.version_r";
10619 goto get_vma_if_bpabi;
10620
10621 case DT_PLTGOT:
10622 name = ".got";
10623 goto get_vma;
10624 case DT_JMPREL:
10625 name = RELOC_SECTION (htab, ".plt");
10626 get_vma:
10627 s = bfd_get_section_by_name (output_bfd, name);
10628 BFD_ASSERT (s != NULL);
10629 if (!htab->symbian_p)
10630 dyn.d_un.d_ptr = s->vma;
10631 else
10632 /* In the BPABI, tags in the PT_DYNAMIC section point
10633 at the file offset, not the memory address, for the
10634 convenience of the post linker. */
10635 dyn.d_un.d_ptr = s->filepos;
10636 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10637 break;
10638
10639 get_vma_if_bpabi:
10640 if (htab->symbian_p)
10641 goto get_vma;
10642 break;
10643
10644 case DT_PLTRELSZ:
10645 s = bfd_get_section_by_name (output_bfd,
10646 RELOC_SECTION (htab, ".plt"));
10647 BFD_ASSERT (s != NULL);
10648 dyn.d_un.d_val = s->size;
10649 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10650 break;
10651
10652 case DT_RELSZ:
10653 case DT_RELASZ:
10654 if (!htab->symbian_p)
10655 {
10656 /* My reading of the SVR4 ABI indicates that the
10657 procedure linkage table relocs (DT_JMPREL) should be
10658 included in the overall relocs (DT_REL). This is
10659 what Solaris does. However, UnixWare can not handle
10660 that case. Therefore, we override the DT_RELSZ entry
10661 here to make it not include the JMPREL relocs. Since
10662 the linker script arranges for .rel(a).plt to follow all
10663 other relocation sections, we don't have to worry
10664 about changing the DT_REL entry. */
10665 s = bfd_get_section_by_name (output_bfd,
10666 RELOC_SECTION (htab, ".plt"));
10667 if (s != NULL)
10668 dyn.d_un.d_val -= s->size;
10669 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10670 break;
10671 }
10672 /* Fall through. */
10673
10674 case DT_REL:
10675 case DT_RELA:
10676 /* In the BPABI, the DT_REL tag must point at the file
10677 offset, not the VMA, of the first relocation
10678 section. So, we use code similar to that in
10679 elflink.c, but do not check for SHF_ALLOC on the
10680 relcoation section, since relocations sections are
10681 never allocated under the BPABI. The comments above
10682 about Unixware notwithstanding, we include all of the
10683 relocations here. */
10684 if (htab->symbian_p)
10685 {
10686 unsigned int i;
10687 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
10688 ? SHT_REL : SHT_RELA);
10689 dyn.d_un.d_val = 0;
10690 for (i = 1; i < elf_numsections (output_bfd); i++)
10691 {
10692 Elf_Internal_Shdr *hdr
10693 = elf_elfsections (output_bfd)[i];
10694 if (hdr->sh_type == type)
10695 {
10696 if (dyn.d_tag == DT_RELSZ
10697 || dyn.d_tag == DT_RELASZ)
10698 dyn.d_un.d_val += hdr->sh_size;
10699 else if ((ufile_ptr) hdr->sh_offset
10700 <= dyn.d_un.d_val - 1)
10701 dyn.d_un.d_val = hdr->sh_offset;
10702 }
10703 }
10704 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10705 }
10706 break;
10707
10708 /* Set the bottom bit of DT_INIT/FINI if the
10709 corresponding function is Thumb. */
10710 case DT_INIT:
10711 name = info->init_function;
10712 goto get_sym;
10713 case DT_FINI:
10714 name = info->fini_function;
10715 get_sym:
10716 /* If it wasn't set by elf_bfd_final_link
10717 then there is nothing to adjust. */
10718 if (dyn.d_un.d_val != 0)
10719 {
10720 struct elf_link_hash_entry * eh;
10721
10722 eh = elf_link_hash_lookup (elf_hash_table (info), name,
10723 FALSE, FALSE, TRUE);
10724 if (eh != NULL
10725 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
10726 {
10727 dyn.d_un.d_val |= 1;
10728 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10729 }
10730 }
10731 break;
10732 }
10733 }
10734
10735 /* Fill in the first entry in the procedure linkage table. */
10736 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
10737 {
10738 const bfd_vma *plt0_entry;
10739 bfd_vma got_address, plt_address, got_displacement;
10740
10741 /* Calculate the addresses of the GOT and PLT. */
10742 got_address = sgot->output_section->vma + sgot->output_offset;
10743 plt_address = splt->output_section->vma + splt->output_offset;
10744
10745 if (htab->vxworks_p)
10746 {
10747 /* The VxWorks GOT is relocated by the dynamic linker.
10748 Therefore, we must emit relocations rather than simply
10749 computing the values now. */
10750 Elf_Internal_Rela rel;
10751
10752 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
10753 put_arm_insn (htab, output_bfd, plt0_entry[0],
10754 splt->contents + 0);
10755 put_arm_insn (htab, output_bfd, plt0_entry[1],
10756 splt->contents + 4);
10757 put_arm_insn (htab, output_bfd, plt0_entry[2],
10758 splt->contents + 8);
10759 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
10760
10761 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
10762 rel.r_offset = plt_address + 12;
10763 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10764 rel.r_addend = 0;
10765 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
10766 htab->srelplt2->contents);
10767 }
10768 else
10769 {
10770 got_displacement = got_address - (plt_address + 16);
10771
10772 plt0_entry = elf32_arm_plt0_entry;
10773 put_arm_insn (htab, output_bfd, plt0_entry[0],
10774 splt->contents + 0);
10775 put_arm_insn (htab, output_bfd, plt0_entry[1],
10776 splt->contents + 4);
10777 put_arm_insn (htab, output_bfd, plt0_entry[2],
10778 splt->contents + 8);
10779 put_arm_insn (htab, output_bfd, plt0_entry[3],
10780 splt->contents + 12);
10781
10782 #ifdef FOUR_WORD_PLT
10783 /* The displacement value goes in the otherwise-unused
10784 last word of the second entry. */
10785 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
10786 #else
10787 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
10788 #endif
10789 }
10790 }
10791
10792 /* UnixWare sets the entsize of .plt to 4, although that doesn't
10793 really seem like the right value. */
10794 if (splt->output_section->owner == output_bfd)
10795 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
10796
10797 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
10798 {
10799 /* Correct the .rel(a).plt.unloaded relocations. They will have
10800 incorrect symbol indexes. */
10801 int num_plts;
10802 unsigned char *p;
10803
10804 num_plts = ((htab->splt->size - htab->plt_header_size)
10805 / htab->plt_entry_size);
10806 p = htab->srelplt2->contents + RELOC_SIZE (htab);
10807
10808 for (; num_plts; num_plts--)
10809 {
10810 Elf_Internal_Rela rel;
10811
10812 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
10813 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
10814 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
10815 p += RELOC_SIZE (htab);
10816
10817 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
10818 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
10819 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
10820 p += RELOC_SIZE (htab);
10821 }
10822 }
10823 }
10824
10825 /* Fill in the first three entries in the global offset table. */
10826 if (sgot)
10827 {
10828 if (sgot->size > 0)
10829 {
10830 if (sdyn == NULL)
10831 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
10832 else
10833 bfd_put_32 (output_bfd,
10834 sdyn->output_section->vma + sdyn->output_offset,
10835 sgot->contents);
10836 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
10837 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
10838 }
10839
10840 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
10841 }
10842
10843 return TRUE;
10844 }
10845
10846 static void
10847 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
10848 {
10849 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
10850 struct elf32_arm_link_hash_table *globals;
10851
10852 i_ehdrp = elf_elfheader (abfd);
10853
10854 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
10855 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
10856 else
10857 i_ehdrp->e_ident[EI_OSABI] = 0;
10858 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
10859
10860 if (link_info)
10861 {
10862 globals = elf32_arm_hash_table (link_info);
10863 if (globals->byteswap_code)
10864 i_ehdrp->e_flags |= EF_ARM_BE8;
10865 }
10866 }
10867
10868 static enum elf_reloc_type_class
10869 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
10870 {
10871 switch ((int) ELF32_R_TYPE (rela->r_info))
10872 {
10873 case R_ARM_RELATIVE:
10874 return reloc_class_relative;
10875 case R_ARM_JUMP_SLOT:
10876 return reloc_class_plt;
10877 case R_ARM_COPY:
10878 return reloc_class_copy;
10879 default:
10880 return reloc_class_normal;
10881 }
10882 }
10883
10884 /* Set the right machine number for an Arm ELF file. */
10885
10886 static bfd_boolean
10887 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
10888 {
10889 if (hdr->sh_type == SHT_NOTE)
10890 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
10891
10892 return TRUE;
10893 }
10894
10895 static void
10896 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
10897 {
10898 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
10899 }
10900
10901 /* Return TRUE if this is an unwinding table entry. */
10902
10903 static bfd_boolean
10904 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
10905 {
10906 return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind)
10907 || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once));
10908 }
10909
10910
10911 /* Set the type and flags for an ARM section. We do this by
10912 the section name, which is a hack, but ought to work. */
10913
10914 static bfd_boolean
10915 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
10916 {
10917 const char * name;
10918
10919 name = bfd_get_section_name (abfd, sec);
10920
10921 if (is_arm_elf_unwind_section_name (abfd, name))
10922 {
10923 hdr->sh_type = SHT_ARM_EXIDX;
10924 hdr->sh_flags |= SHF_LINK_ORDER;
10925 }
10926 return TRUE;
10927 }
10928
10929 /* Handle an ARM specific section when reading an object file. This is
10930 called when bfd_section_from_shdr finds a section with an unknown
10931 type. */
10932
10933 static bfd_boolean
10934 elf32_arm_section_from_shdr (bfd *abfd,
10935 Elf_Internal_Shdr * hdr,
10936 const char *name,
10937 int shindex)
10938 {
10939 /* There ought to be a place to keep ELF backend specific flags, but
10940 at the moment there isn't one. We just keep track of the
10941 sections by their name, instead. Fortunately, the ABI gives
10942 names for all the ARM specific sections, so we will probably get
10943 away with this. */
10944 switch (hdr->sh_type)
10945 {
10946 case SHT_ARM_EXIDX:
10947 case SHT_ARM_PREEMPTMAP:
10948 case SHT_ARM_ATTRIBUTES:
10949 break;
10950
10951 default:
10952 return FALSE;
10953 }
10954
10955 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
10956 return FALSE;
10957
10958 return TRUE;
10959 }
10960
10961 /* A structure used to record a list of sections, independently
10962 of the next and prev fields in the asection structure. */
10963 typedef struct section_list
10964 {
10965 asection * sec;
10966 struct section_list * next;
10967 struct section_list * prev;
10968 }
10969 section_list;
10970
10971 /* Unfortunately we need to keep a list of sections for which
10972 an _arm_elf_section_data structure has been allocated. This
10973 is because it is possible for functions like elf32_arm_write_section
10974 to be called on a section which has had an elf_data_structure
10975 allocated for it (and so the used_by_bfd field is valid) but
10976 for which the ARM extended version of this structure - the
10977 _arm_elf_section_data structure - has not been allocated. */
10978 static section_list * sections_with_arm_elf_section_data = NULL;
10979
10980 static void
10981 record_section_with_arm_elf_section_data (asection * sec)
10982 {
10983 struct section_list * entry;
10984
10985 entry = bfd_malloc (sizeof (* entry));
10986 if (entry == NULL)
10987 return;
10988 entry->sec = sec;
10989 entry->next = sections_with_arm_elf_section_data;
10990 entry->prev = NULL;
10991 if (entry->next != NULL)
10992 entry->next->prev = entry;
10993 sections_with_arm_elf_section_data = entry;
10994 }
10995
10996 static struct section_list *
10997 find_arm_elf_section_entry (asection * sec)
10998 {
10999 struct section_list * entry;
11000 static struct section_list * last_entry = NULL;
11001
11002 /* This is a short cut for the typical case where the sections are added
11003 to the sections_with_arm_elf_section_data list in forward order and
11004 then looked up here in backwards order. This makes a real difference
11005 to the ld-srec/sec64k.exp linker test. */
11006 entry = sections_with_arm_elf_section_data;
11007 if (last_entry != NULL)
11008 {
11009 if (last_entry->sec == sec)
11010 entry = last_entry;
11011 else if (last_entry->next != NULL
11012 && last_entry->next->sec == sec)
11013 entry = last_entry->next;
11014 }
11015
11016 for (; entry; entry = entry->next)
11017 if (entry->sec == sec)
11018 break;
11019
11020 if (entry)
11021 /* Record the entry prior to this one - it is the entry we are most
11022 likely to want to locate next time. Also this way if we have been
11023 called from unrecord_section_with_arm_elf_section_data() we will not
11024 be caching a pointer that is about to be freed. */
11025 last_entry = entry->prev;
11026
11027 return entry;
11028 }
11029
11030 static _arm_elf_section_data *
11031 get_arm_elf_section_data (asection * sec)
11032 {
11033 struct section_list * entry;
11034
11035 entry = find_arm_elf_section_entry (sec);
11036
11037 if (entry)
11038 return elf32_arm_section_data (entry->sec);
11039 else
11040 return NULL;
11041 }
11042
11043 static void
11044 unrecord_section_with_arm_elf_section_data (asection * sec)
11045 {
11046 struct section_list * entry;
11047
11048 entry = find_arm_elf_section_entry (sec);
11049
11050 if (entry)
11051 {
11052 if (entry->prev != NULL)
11053 entry->prev->next = entry->next;
11054 if (entry->next != NULL)
11055 entry->next->prev = entry->prev;
11056 if (entry == sections_with_arm_elf_section_data)
11057 sections_with_arm_elf_section_data = entry->next;
11058 free (entry);
11059 }
11060 }
11061
11062
11063 typedef struct
11064 {
11065 void *finfo;
11066 struct bfd_link_info *info;
11067 asection *sec;
11068 int sec_shndx;
11069 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
11070 asection *, struct elf_link_hash_entry *);
11071 } output_arch_syminfo;
11072
11073 enum map_symbol_type
11074 {
11075 ARM_MAP_ARM,
11076 ARM_MAP_THUMB,
11077 ARM_MAP_DATA
11078 };
11079
11080
11081 /* Output a single mapping symbol. */
11082
11083 static bfd_boolean
11084 elf32_arm_output_map_sym (output_arch_syminfo *osi,
11085 enum map_symbol_type type,
11086 bfd_vma offset)
11087 {
11088 static const char *names[3] = {"$a", "$t", "$d"};
11089 struct elf32_arm_link_hash_table *htab;
11090 Elf_Internal_Sym sym;
11091
11092 htab = elf32_arm_hash_table (osi->info);
11093 sym.st_value = osi->sec->output_section->vma
11094 + osi->sec->output_offset
11095 + offset;
11096 sym.st_size = 0;
11097 sym.st_other = 0;
11098 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
11099 sym.st_shndx = osi->sec_shndx;
11100 if (!osi->func (osi->finfo, names[type], &sym, osi->sec, NULL))
11101 return FALSE;
11102 return TRUE;
11103 }
11104
11105
11106 /* Output mapping symbols for PLT entries associated with H. */
11107
11108 static bfd_boolean
11109 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
11110 {
11111 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
11112 struct elf32_arm_link_hash_table *htab;
11113 struct elf32_arm_link_hash_entry *eh;
11114 bfd_vma addr;
11115
11116 htab = elf32_arm_hash_table (osi->info);
11117
11118 if (h->root.type == bfd_link_hash_indirect)
11119 return TRUE;
11120
11121 if (h->root.type == bfd_link_hash_warning)
11122 /* When warning symbols are created, they **replace** the "real"
11123 entry in the hash table, thus we never get to see the real
11124 symbol in a hash traversal. So look at it now. */
11125 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11126
11127 if (h->plt.offset == (bfd_vma) -1)
11128 return TRUE;
11129
11130 eh = (struct elf32_arm_link_hash_entry *) h;
11131 addr = h->plt.offset;
11132 if (htab->symbian_p)
11133 {
11134 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11135 return FALSE;
11136 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
11137 return FALSE;
11138 }
11139 else if (htab->vxworks_p)
11140 {
11141 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11142 return FALSE;
11143 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11144 return FALSE;
11145 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12))
11146 return FALSE;
11147 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20))
11148 return FALSE;
11149 }
11150 else
11151 {
11152 bfd_signed_vma thumb_refs;
11153
11154 thumb_refs = eh->plt_thumb_refcount;
11155 if (!htab->use_blx)
11156 thumb_refs += eh->plt_maybe_thumb_refcount;
11157
11158 if (thumb_refs > 0)
11159 {
11160 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4))
11161 return FALSE;
11162 }
11163 #ifdef FOUR_WORD_PLT
11164 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11165 return FALSE;
11166 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
11167 return FALSE;
11168 #else
11169 /* A three-word PLT with no Thumb thunk contains only Arm code,
11170 so only need to output a mapping symbol for the first PLT entry and
11171 entries with thumb thunks. */
11172 if (thumb_refs > 0 || addr == 20)
11173 {
11174 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11175 return FALSE;
11176 }
11177 #endif
11178 }
11179
11180 return TRUE;
11181 }
11182
11183 /* Output a single local symbol for a generated stub. */
11184
11185 static bfd_boolean
11186 elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name,
11187 bfd_vma offset, bfd_vma size)
11188 {
11189 struct elf32_arm_link_hash_table *htab;
11190 Elf_Internal_Sym sym;
11191
11192 htab = elf32_arm_hash_table (osi->info);
11193 sym.st_value = osi->sec->output_section->vma
11194 + osi->sec->output_offset
11195 + offset;
11196 sym.st_size = size;
11197 sym.st_other = 0;
11198 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
11199 sym.st_shndx = osi->sec_shndx;
11200 if (!osi->func (osi->finfo, name, &sym, osi->sec, NULL))
11201 return FALSE;
11202 return TRUE;
11203 }
11204
11205 static bfd_boolean
11206 arm_map_one_stub (struct bfd_hash_entry * gen_entry,
11207 void * in_arg)
11208 {
11209 struct elf32_arm_stub_hash_entry *stub_entry;
11210 struct bfd_link_info *info;
11211 struct elf32_arm_link_hash_table *htab;
11212 asection *stub_sec;
11213 bfd_vma addr;
11214 char *stub_name;
11215 output_arch_syminfo *osi;
11216
11217 /* Massage our args to the form they really have. */
11218 stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry;
11219 osi = (output_arch_syminfo *) in_arg;
11220
11221 info = osi->info;
11222
11223 htab = elf32_arm_hash_table (info);
11224 stub_sec = stub_entry->stub_sec;
11225
11226 /* Ensure this stub is attached to the current section being
11227 processed. */
11228 if (stub_sec != osi->sec)
11229 return TRUE;
11230
11231 addr = (bfd_vma) stub_entry->stub_offset;
11232 stub_name = stub_entry->output_name;
11233
11234 switch (stub_entry->stub_type)
11235 {
11236 case arm_stub_long_branch:
11237 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 8))
11238 return FALSE;
11239 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11240 return FALSE;
11241 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4))
11242 return FALSE;
11243 break;
11244 case arm_thumb_v4t_stub_long_branch:
11245 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 12))
11246 return FALSE;
11247 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11248 return FALSE;
11249 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11250 return FALSE;
11251 break;
11252 case arm_thumb_thumb_stub_long_branch:
11253 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 16))
11254 return FALSE;
11255 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
11256 return FALSE;
11257 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12))
11258 return FALSE;
11259 break;
11260 case arm_thumb_arm_v4t_stub_long_branch:
11261 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 20))
11262 return FALSE;
11263 if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr))
11264 return FALSE;
11265 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 8))
11266 return FALSE;
11267 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 16))
11268 return FALSE;
11269 break;
11270 case arm_thumb_arm_v4t_stub_short_branch:
11271 if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, 8))
11272 return FALSE;
11273 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 4))
11274 return FALSE;
11275 break;
11276 case arm_stub_pic_long_branch:
11277 if (!elf32_arm_output_stub_sym (osi, stub_name, addr, 12))
11278 return FALSE;
11279 if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr))
11280 return FALSE;
11281 if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8))
11282 return FALSE;
11283 break;
11284 default:
11285 BFD_FAIL ();
11286 }
11287
11288 return TRUE;
11289 }
11290
11291 /* Output mapping symbols for linker generated sections. */
11292
11293 static bfd_boolean
11294 elf32_arm_output_arch_local_syms (bfd *output_bfd,
11295 struct bfd_link_info *info,
11296 void *finfo,
11297 bfd_boolean (*func) (void *, const char *,
11298 Elf_Internal_Sym *,
11299 asection *,
11300 struct elf_link_hash_entry *))
11301 {
11302 output_arch_syminfo osi;
11303 struct elf32_arm_link_hash_table *htab;
11304 bfd_vma offset;
11305 bfd_size_type size;
11306
11307 htab = elf32_arm_hash_table (info);
11308 check_use_blx (htab);
11309
11310 osi.finfo = finfo;
11311 osi.info = info;
11312 osi.func = func;
11313
11314 /* ARM->Thumb glue. */
11315 if (htab->arm_glue_size > 0)
11316 {
11317 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11318 ARM2THUMB_GLUE_SECTION_NAME);
11319
11320 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11321 (output_bfd, osi.sec->output_section);
11322 if (info->shared || htab->root.is_relocatable_executable
11323 || htab->pic_veneer)
11324 size = ARM2THUMB_PIC_GLUE_SIZE;
11325 else if (htab->use_blx)
11326 size = ARM2THUMB_V5_STATIC_GLUE_SIZE;
11327 else
11328 size = ARM2THUMB_STATIC_GLUE_SIZE;
11329
11330 for (offset = 0; offset < htab->arm_glue_size; offset += size)
11331 {
11332 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset);
11333 elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4);
11334 }
11335 }
11336
11337 /* Thumb->ARM glue. */
11338 if (htab->thumb_glue_size > 0)
11339 {
11340 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11341 THUMB2ARM_GLUE_SECTION_NAME);
11342
11343 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11344 (output_bfd, osi.sec->output_section);
11345 size = THUMB2ARM_GLUE_SIZE;
11346
11347 for (offset = 0; offset < htab->thumb_glue_size; offset += size)
11348 {
11349 elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset);
11350 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4);
11351 }
11352 }
11353
11354 /* ARMv4 BX veneers. */
11355 if (htab->bx_glue_size > 0)
11356 {
11357 osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner,
11358 ARM_BX_GLUE_SECTION_NAME);
11359
11360 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11361 (output_bfd, osi.sec->output_section);
11362
11363 elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0);
11364 }
11365
11366 /* Long calls stubs. */
11367 if (htab->stub_bfd && htab->stub_bfd->sections)
11368 {
11369 asection* stub_sec;
11370
11371 for (stub_sec = htab->stub_bfd->sections;
11372 stub_sec != NULL;
11373 stub_sec = stub_sec->next)
11374 {
11375 /* Ignore non-stub sections. */
11376 if (!strstr (stub_sec->name, STUB_SUFFIX))
11377 continue;
11378
11379 osi.sec = stub_sec;
11380
11381 osi.sec_shndx = _bfd_elf_section_from_bfd_section
11382 (output_bfd, osi.sec->output_section);
11383
11384 bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi);
11385 }
11386 }
11387
11388 /* Finally, output mapping symbols for the PLT. */
11389 if (!htab->splt || htab->splt->size == 0)
11390 return TRUE;
11391
11392 osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
11393 htab->splt->output_section);
11394 osi.sec = htab->splt;
11395 /* Output mapping symbols for the plt header. SymbianOS does not have a
11396 plt header. */
11397 if (htab->vxworks_p)
11398 {
11399 /* VxWorks shared libraries have no PLT header. */
11400 if (!info->shared)
11401 {
11402 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
11403 return FALSE;
11404 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12))
11405 return FALSE;
11406 }
11407 }
11408 else if (!htab->symbian_p)
11409 {
11410 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0))
11411 return FALSE;
11412 #ifndef FOUR_WORD_PLT
11413 if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16))
11414 return FALSE;
11415 #endif
11416 }
11417
11418 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
11419 return TRUE;
11420 }
11421
11422 /* Allocate target specific section data. */
11423
11424 static bfd_boolean
11425 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
11426 {
11427 if (!sec->used_by_bfd)
11428 {
11429 _arm_elf_section_data *sdata;
11430 bfd_size_type amt = sizeof (*sdata);
11431
11432 sdata = bfd_zalloc (abfd, amt);
11433 if (sdata == NULL)
11434 return FALSE;
11435 sec->used_by_bfd = sdata;
11436 }
11437
11438 record_section_with_arm_elf_section_data (sec);
11439
11440 return _bfd_elf_new_section_hook (abfd, sec);
11441 }
11442
11443
11444 /* Used to order a list of mapping symbols by address. */
11445
11446 static int
11447 elf32_arm_compare_mapping (const void * a, const void * b)
11448 {
11449 const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a;
11450 const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b;
11451
11452 if (amap->vma > bmap->vma)
11453 return 1;
11454 else if (amap->vma < bmap->vma)
11455 return -1;
11456 else if (amap->type > bmap->type)
11457 /* Ensure results do not depend on the host qsort for objects with
11458 multiple mapping symbols at the same address by sorting on type
11459 after vma. */
11460 return 1;
11461 else if (amap->type < bmap->type)
11462 return -1;
11463 else
11464 return 0;
11465 }
11466
11467
11468 /* Do code byteswapping. Return FALSE afterwards so that the section is
11469 written out as normal. */
11470
11471 static bfd_boolean
11472 elf32_arm_write_section (bfd *output_bfd,
11473 struct bfd_link_info *link_info,
11474 asection *sec,
11475 bfd_byte *contents)
11476 {
11477 int mapcount, errcount;
11478 _arm_elf_section_data *arm_data;
11479 struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info);
11480 elf32_arm_section_map *map;
11481 elf32_vfp11_erratum_list *errnode;
11482 bfd_vma ptr;
11483 bfd_vma end;
11484 bfd_vma offset = sec->output_section->vma + sec->output_offset;
11485 bfd_byte tmp;
11486 int i;
11487
11488 /* If this section has not been allocated an _arm_elf_section_data
11489 structure then we cannot record anything. */
11490 arm_data = get_arm_elf_section_data (sec);
11491 if (arm_data == NULL)
11492 return FALSE;
11493
11494 mapcount = arm_data->mapcount;
11495 map = arm_data->map;
11496 errcount = arm_data->erratumcount;
11497
11498 if (errcount != 0)
11499 {
11500 unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0;
11501
11502 for (errnode = arm_data->erratumlist; errnode != 0;
11503 errnode = errnode->next)
11504 {
11505 bfd_vma index = errnode->vma - offset;
11506
11507 switch (errnode->type)
11508 {
11509 case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER:
11510 {
11511 bfd_vma branch_to_veneer;
11512 /* Original condition code of instruction, plus bit mask for
11513 ARM B instruction. */
11514 unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000)
11515 | 0x0a000000;
11516
11517 /* The instruction is before the label. */
11518 index -= 4;
11519
11520 /* Above offset included in -4 below. */
11521 branch_to_veneer = errnode->u.b.veneer->vma
11522 - errnode->vma - 4;
11523
11524 if ((signed) branch_to_veneer < -(1 << 25)
11525 || (signed) branch_to_veneer >= (1 << 25))
11526 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
11527 "range"), output_bfd);
11528
11529 insn |= (branch_to_veneer >> 2) & 0xffffff;
11530 contents[endianflip ^ index] = insn & 0xff;
11531 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
11532 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
11533 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
11534 }
11535 break;
11536
11537 case VFP11_ERRATUM_ARM_VENEER:
11538 {
11539 bfd_vma branch_from_veneer;
11540 unsigned int insn;
11541
11542 /* Take size of veneer into account. */
11543 branch_from_veneer = errnode->u.v.branch->vma
11544 - errnode->vma - 12;
11545
11546 if ((signed) branch_from_veneer < -(1 << 25)
11547 || (signed) branch_from_veneer >= (1 << 25))
11548 (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of "
11549 "range"), output_bfd);
11550
11551 /* Original instruction. */
11552 insn = errnode->u.v.branch->u.b.vfp_insn;
11553 contents[endianflip ^ index] = insn & 0xff;
11554 contents[endianflip ^ (index + 1)] = (insn >> 8) & 0xff;
11555 contents[endianflip ^ (index + 2)] = (insn >> 16) & 0xff;
11556 contents[endianflip ^ (index + 3)] = (insn >> 24) & 0xff;
11557
11558 /* Branch back to insn after original insn. */
11559 insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff);
11560 contents[endianflip ^ (index + 4)] = insn & 0xff;
11561 contents[endianflip ^ (index + 5)] = (insn >> 8) & 0xff;
11562 contents[endianflip ^ (index + 6)] = (insn >> 16) & 0xff;
11563 contents[endianflip ^ (index + 7)] = (insn >> 24) & 0xff;
11564 }
11565 break;
11566
11567 default:
11568 abort ();
11569 }
11570 }
11571 }
11572
11573 if (mapcount == 0)
11574 return FALSE;
11575
11576 if (globals->byteswap_code)
11577 {
11578 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
11579
11580 ptr = map[0].vma;
11581 for (i = 0; i < mapcount; i++)
11582 {
11583 if (i == mapcount - 1)
11584 end = sec->size;
11585 else
11586 end = map[i + 1].vma;
11587
11588 switch (map[i].type)
11589 {
11590 case 'a':
11591 /* Byte swap code words. */
11592 while (ptr + 3 < end)
11593 {
11594 tmp = contents[ptr];
11595 contents[ptr] = contents[ptr + 3];
11596 contents[ptr + 3] = tmp;
11597 tmp = contents[ptr + 1];
11598 contents[ptr + 1] = contents[ptr + 2];
11599 contents[ptr + 2] = tmp;
11600 ptr += 4;
11601 }
11602 break;
11603
11604 case 't':
11605 /* Byte swap code halfwords. */
11606 while (ptr + 1 < end)
11607 {
11608 tmp = contents[ptr];
11609 contents[ptr] = contents[ptr + 1];
11610 contents[ptr + 1] = tmp;
11611 ptr += 2;
11612 }
11613 break;
11614
11615 case 'd':
11616 /* Leave data alone. */
11617 break;
11618 }
11619 ptr = end;
11620 }
11621 }
11622
11623 free (map);
11624 arm_data->mapcount = 0;
11625 arm_data->mapsize = 0;
11626 arm_data->map = NULL;
11627 unrecord_section_with_arm_elf_section_data (sec);
11628
11629 return FALSE;
11630 }
11631
11632 static void
11633 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
11634 asection * sec,
11635 void * ignore ATTRIBUTE_UNUSED)
11636 {
11637 unrecord_section_with_arm_elf_section_data (sec);
11638 }
11639
11640 static bfd_boolean
11641 elf32_arm_close_and_cleanup (bfd * abfd)
11642 {
11643 if (abfd->sections)
11644 bfd_map_over_sections (abfd,
11645 unrecord_section_via_map_over_sections,
11646 NULL);
11647
11648 return _bfd_elf_close_and_cleanup (abfd);
11649 }
11650
11651 static bfd_boolean
11652 elf32_arm_bfd_free_cached_info (bfd * abfd)
11653 {
11654 if (abfd->sections)
11655 bfd_map_over_sections (abfd,
11656 unrecord_section_via_map_over_sections,
11657 NULL);
11658
11659 return _bfd_free_cached_info (abfd);
11660 }
11661
11662 /* Display STT_ARM_TFUNC symbols as functions. */
11663
11664 static void
11665 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
11666 asymbol *asym)
11667 {
11668 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
11669
11670 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
11671 elfsym->symbol.flags |= BSF_FUNCTION;
11672 }
11673
11674
11675 /* Mangle thumb function symbols as we read them in. */
11676
11677 static bfd_boolean
11678 elf32_arm_swap_symbol_in (bfd * abfd,
11679 const void *psrc,
11680 const void *pshn,
11681 Elf_Internal_Sym *dst)
11682 {
11683 if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst))
11684 return FALSE;
11685
11686 /* New EABI objects mark thumb function symbols by setting the low bit of
11687 the address. Turn these into STT_ARM_TFUNC. */
11688 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
11689 && (dst->st_value & 1))
11690 {
11691 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
11692 dst->st_value &= ~(bfd_vma) 1;
11693 }
11694 return TRUE;
11695 }
11696
11697
11698 /* Mangle thumb function symbols as we write them out. */
11699
11700 static void
11701 elf32_arm_swap_symbol_out (bfd *abfd,
11702 const Elf_Internal_Sym *src,
11703 void *cdst,
11704 void *shndx)
11705 {
11706 Elf_Internal_Sym newsym;
11707
11708 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
11709 of the address set, as per the new EABI. We do this unconditionally
11710 because objcopy does not set the elf header flags until after
11711 it writes out the symbol table. */
11712 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
11713 {
11714 newsym = *src;
11715 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
11716 if (newsym.st_shndx != SHN_UNDEF)
11717 {
11718 /* Do this only for defined symbols. At link type, the static
11719 linker will simulate the work of dynamic linker of resolving
11720 symbols and will carry over the thumbness of found symbols to
11721 the output symbol table. It's not clear how it happens, but
11722 the thumbness of undefined symbols can well be different at
11723 runtime, and writing '1' for them will be confusing for users
11724 and possibly for dynamic linker itself.
11725 */
11726 newsym.st_value |= 1;
11727 }
11728
11729 src = &newsym;
11730 }
11731 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
11732 }
11733
11734 /* Add the PT_ARM_EXIDX program header. */
11735
11736 static bfd_boolean
11737 elf32_arm_modify_segment_map (bfd *abfd,
11738 struct bfd_link_info *info ATTRIBUTE_UNUSED)
11739 {
11740 struct elf_segment_map *m;
11741 asection *sec;
11742
11743 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
11744 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
11745 {
11746 /* If there is already a PT_ARM_EXIDX header, then we do not
11747 want to add another one. This situation arises when running
11748 "strip"; the input binary already has the header. */
11749 m = elf_tdata (abfd)->segment_map;
11750 while (m && m->p_type != PT_ARM_EXIDX)
11751 m = m->next;
11752 if (!m)
11753 {
11754 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
11755 if (m == NULL)
11756 return FALSE;
11757 m->p_type = PT_ARM_EXIDX;
11758 m->count = 1;
11759 m->sections[0] = sec;
11760
11761 m->next = elf_tdata (abfd)->segment_map;
11762 elf_tdata (abfd)->segment_map = m;
11763 }
11764 }
11765
11766 return TRUE;
11767 }
11768
11769 /* We may add a PT_ARM_EXIDX program header. */
11770
11771 static int
11772 elf32_arm_additional_program_headers (bfd *abfd,
11773 struct bfd_link_info *info ATTRIBUTE_UNUSED)
11774 {
11775 asection *sec;
11776
11777 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
11778 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
11779 return 1;
11780 else
11781 return 0;
11782 }
11783
11784 /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */
11785
11786 static bfd_boolean
11787 elf32_arm_is_function_type (unsigned int type)
11788 {
11789 return (type == STT_FUNC) || (type == STT_ARM_TFUNC);
11790 }
11791
11792 /* We use this to override swap_symbol_in and swap_symbol_out. */
11793 const struct elf_size_info elf32_arm_size_info =
11794 {
11795 sizeof (Elf32_External_Ehdr),
11796 sizeof (Elf32_External_Phdr),
11797 sizeof (Elf32_External_Shdr),
11798 sizeof (Elf32_External_Rel),
11799 sizeof (Elf32_External_Rela),
11800 sizeof (Elf32_External_Sym),
11801 sizeof (Elf32_External_Dyn),
11802 sizeof (Elf_External_Note),
11803 4,
11804 1,
11805 32, 2,
11806 ELFCLASS32, EV_CURRENT,
11807 bfd_elf32_write_out_phdrs,
11808 bfd_elf32_write_shdrs_and_ehdr,
11809 bfd_elf32_checksum_contents,
11810 bfd_elf32_write_relocs,
11811 elf32_arm_swap_symbol_in,
11812 elf32_arm_swap_symbol_out,
11813 bfd_elf32_slurp_reloc_table,
11814 bfd_elf32_slurp_symbol_table,
11815 bfd_elf32_swap_dyn_in,
11816 bfd_elf32_swap_dyn_out,
11817 bfd_elf32_swap_reloc_in,
11818 bfd_elf32_swap_reloc_out,
11819 bfd_elf32_swap_reloca_in,
11820 bfd_elf32_swap_reloca_out
11821 };
11822
11823 #define ELF_ARCH bfd_arch_arm
11824 #define ELF_MACHINE_CODE EM_ARM
11825 #ifdef __QNXTARGET__
11826 #define ELF_MAXPAGESIZE 0x1000
11827 #else
11828 #define ELF_MAXPAGESIZE 0x8000
11829 #endif
11830 #define ELF_MINPAGESIZE 0x1000
11831 #define ELF_COMMONPAGESIZE 0x1000
11832
11833 #define bfd_elf32_mkobject elf32_arm_mkobject
11834
11835 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
11836 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
11837 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
11838 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
11839 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
11840 #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free
11841 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
11842 #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup
11843 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
11844 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
11845 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
11846 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
11847 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
11848 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
11849
11850 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
11851 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
11852 #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections
11853 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
11854 #define elf_backend_check_relocs elf32_arm_check_relocs
11855 #define elf_backend_relocate_section elf32_arm_relocate_section
11856 #define elf_backend_write_section elf32_arm_write_section
11857 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
11858 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
11859 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
11860 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
11861 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
11862 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
11863 #define elf_backend_post_process_headers elf32_arm_post_process_headers
11864 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
11865 #define elf_backend_object_p elf32_arm_object_p
11866 #define elf_backend_section_flags elf32_arm_section_flags
11867 #define elf_backend_fake_sections elf32_arm_fake_sections
11868 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
11869 #define elf_backend_final_write_processing elf32_arm_final_write_processing
11870 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
11871 #define elf_backend_symbol_processing elf32_arm_symbol_processing
11872 #define elf_backend_size_info elf32_arm_size_info
11873 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
11874 #define elf_backend_additional_program_headers elf32_arm_additional_program_headers
11875 #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms
11876 #define elf_backend_begin_write_processing elf32_arm_begin_write_processing
11877 #define elf_backend_is_function_type elf32_arm_is_function_type
11878
11879 #define elf_backend_can_refcount 1
11880 #define elf_backend_can_gc_sections 1
11881 #define elf_backend_plt_readonly 1
11882 #define elf_backend_want_got_plt 1
11883 #define elf_backend_want_plt_sym 0
11884 #define elf_backend_may_use_rel_p 1
11885 #define elf_backend_may_use_rela_p 0
11886 #define elf_backend_default_use_rela_p 0
11887
11888 #define elf_backend_got_header_size 12
11889
11890 #undef elf_backend_obj_attrs_vendor
11891 #define elf_backend_obj_attrs_vendor "aeabi"
11892 #undef elf_backend_obj_attrs_section
11893 #define elf_backend_obj_attrs_section ".ARM.attributes"
11894 #undef elf_backend_obj_attrs_arg_type
11895 #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type
11896 #undef elf_backend_obj_attrs_section_type
11897 #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
11898
11899 #include "elf32-target.h"
11900
11901 /* VxWorks Targets. */
11902
11903 #undef TARGET_LITTLE_SYM
11904 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
11905 #undef TARGET_LITTLE_NAME
11906 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
11907 #undef TARGET_BIG_SYM
11908 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
11909 #undef TARGET_BIG_NAME
11910 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
11911
11912 /* Like elf32_arm_link_hash_table_create -- but overrides
11913 appropriately for VxWorks. */
11914
11915 static struct bfd_link_hash_table *
11916 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
11917 {
11918 struct bfd_link_hash_table *ret;
11919
11920 ret = elf32_arm_link_hash_table_create (abfd);
11921 if (ret)
11922 {
11923 struct elf32_arm_link_hash_table *htab
11924 = (struct elf32_arm_link_hash_table *) ret;
11925 htab->use_rel = 0;
11926 htab->vxworks_p = 1;
11927 }
11928 return ret;
11929 }
11930
11931 static void
11932 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11933 {
11934 elf32_arm_final_write_processing (abfd, linker);
11935 elf_vxworks_final_write_processing (abfd, linker);
11936 }
11937
11938 #undef elf32_bed
11939 #define elf32_bed elf32_arm_vxworks_bed
11940
11941 #undef bfd_elf32_bfd_link_hash_table_create
11942 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create
11943 #undef elf_backend_add_symbol_hook
11944 #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook
11945 #undef elf_backend_final_write_processing
11946 #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing
11947 #undef elf_backend_emit_relocs
11948 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
11949
11950 #undef elf_backend_may_use_rel_p
11951 #define elf_backend_may_use_rel_p 0
11952 #undef elf_backend_may_use_rela_p
11953 #define elf_backend_may_use_rela_p 1
11954 #undef elf_backend_default_use_rela_p
11955 #define elf_backend_default_use_rela_p 1
11956 #undef elf_backend_want_plt_sym
11957 #define elf_backend_want_plt_sym 1
11958 #undef ELF_MAXPAGESIZE
11959 #define ELF_MAXPAGESIZE 0x1000
11960
11961 #include "elf32-target.h"
11962
11963
11964 /* Symbian OS Targets. */
11965
11966 #undef TARGET_LITTLE_SYM
11967 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
11968 #undef TARGET_LITTLE_NAME
11969 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
11970 #undef TARGET_BIG_SYM
11971 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
11972 #undef TARGET_BIG_NAME
11973 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
11974
11975 /* Like elf32_arm_link_hash_table_create -- but overrides
11976 appropriately for Symbian OS. */
11977
11978 static struct bfd_link_hash_table *
11979 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
11980 {
11981 struct bfd_link_hash_table *ret;
11982
11983 ret = elf32_arm_link_hash_table_create (abfd);
11984 if (ret)
11985 {
11986 struct elf32_arm_link_hash_table *htab
11987 = (struct elf32_arm_link_hash_table *)ret;
11988 /* There is no PLT header for Symbian OS. */
11989 htab->plt_header_size = 0;
11990 /* The PLT entries are each one instruction and one word. */
11991 htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry);
11992 htab->symbian_p = 1;
11993 /* Symbian uses armv5t or above, so use_blx is always true. */
11994 htab->use_blx = 1;
11995 htab->root.is_relocatable_executable = 1;
11996 }
11997 return ret;
11998 }
11999
12000 static const struct bfd_elf_special_section
12001 elf32_arm_symbian_special_sections[] =
12002 {
12003 /* In a BPABI executable, the dynamic linking sections do not go in
12004 the loadable read-only segment. The post-linker may wish to
12005 refer to these sections, but they are not part of the final
12006 program image. */
12007 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 },
12008 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 },
12009 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 },
12010 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 },
12011 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 },
12012 /* These sections do not need to be writable as the SymbianOS
12013 postlinker will arrange things so that no dynamic relocation is
12014 required. */
12015 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC },
12016 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC },
12017 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
12018 { NULL, 0, 0, 0, 0 }
12019 };
12020
12021 static void
12022 elf32_arm_symbian_begin_write_processing (bfd *abfd,
12023 struct bfd_link_info *link_info)
12024 {
12025 /* BPABI objects are never loaded directly by an OS kernel; they are
12026 processed by a postlinker first, into an OS-specific format. If
12027 the D_PAGED bit is set on the file, BFD will align segments on
12028 page boundaries, so that an OS can directly map the file. With
12029 BPABI objects, that just results in wasted space. In addition,
12030 because we clear the D_PAGED bit, map_sections_to_segments will
12031 recognize that the program headers should not be mapped into any
12032 loadable segment. */
12033 abfd->flags &= ~D_PAGED;
12034 elf32_arm_begin_write_processing (abfd, link_info);
12035 }
12036
12037 static bfd_boolean
12038 elf32_arm_symbian_modify_segment_map (bfd *abfd,
12039 struct bfd_link_info *info)
12040 {
12041 struct elf_segment_map *m;
12042 asection *dynsec;
12043
12044 /* BPABI shared libraries and executables should have a PT_DYNAMIC
12045 segment. However, because the .dynamic section is not marked
12046 with SEC_LOAD, the generic ELF code will not create such a
12047 segment. */
12048 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
12049 if (dynsec)
12050 {
12051 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
12052 if (m->p_type == PT_DYNAMIC)
12053 break;
12054
12055 if (m == NULL)
12056 {
12057 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
12058 m->next = elf_tdata (abfd)->segment_map;
12059 elf_tdata (abfd)->segment_map = m;
12060 }
12061 }
12062
12063 /* Also call the generic arm routine. */
12064 return elf32_arm_modify_segment_map (abfd, info);
12065 }
12066
12067 /* Return address for Ith PLT stub in section PLT, for relocation REL
12068 or (bfd_vma) -1 if it should not be included. */
12069
12070 static bfd_vma
12071 elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt,
12072 const arelent *rel ATTRIBUTE_UNUSED)
12073 {
12074 return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i;
12075 }
12076
12077
12078 #undef elf32_bed
12079 #define elf32_bed elf32_arm_symbian_bed
12080
12081 /* The dynamic sections are not allocated on SymbianOS; the postlinker
12082 will process them and then discard them. */
12083 #undef ELF_DYNAMIC_SEC_FLAGS
12084 #define ELF_DYNAMIC_SEC_FLAGS \
12085 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
12086
12087 #undef elf_backend_add_symbol_hook
12088 #undef elf_backend_emit_relocs
12089
12090 #undef bfd_elf32_bfd_link_hash_table_create
12091 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create
12092 #undef elf_backend_special_sections
12093 #define elf_backend_special_sections elf32_arm_symbian_special_sections
12094 #undef elf_backend_begin_write_processing
12095 #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing
12096 #undef elf_backend_final_write_processing
12097 #define elf_backend_final_write_processing elf32_arm_final_write_processing
12098
12099 #undef elf_backend_modify_segment_map
12100 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
12101
12102 /* There is no .got section for BPABI objects, and hence no header. */
12103 #undef elf_backend_got_header_size
12104 #define elf_backend_got_header_size 0
12105
12106 /* Similarly, there is no .got.plt section. */
12107 #undef elf_backend_want_got_plt
12108 #define elf_backend_want_got_plt 0
12109
12110 #undef elf_backend_plt_sym_val
12111 #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val
12112
12113 #undef elf_backend_may_use_rel_p
12114 #define elf_backend_may_use_rel_p 1
12115 #undef elf_backend_may_use_rela_p
12116 #define elf_backend_may_use_rela_p 0
12117 #undef elf_backend_default_use_rela_p
12118 #define elf_backend_default_use_rela_p 0
12119 #undef elf_backend_want_plt_sym
12120 #define elf_backend_want_plt_sym 0
12121 #undef ELF_MAXPAGESIZE
12122 #define ELF_MAXPAGESIZE 0x8000
12123
12124 #include "elf32-target.h"
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