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* elf64-hppa.c (elf64_hppa_new_dyn_hash_entry): Don't clear everything,
[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "elf/arm.h"
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26
27 #ifndef NUM_ELEM
28 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
29 #endif
30
31 #define elf_info_to_howto 0
32 #define elf_info_to_howto_rel elf32_arm_info_to_howto
33
34 #define ARM_ELF_ABI_VERSION 0
35 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
36
37 static reloc_howto_type * elf32_arm_reloc_type_lookup
38 PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
39 static bfd_boolean elf32_arm_nabi_grok_prstatus
40 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
41 static bfd_boolean elf32_arm_nabi_grok_psinfo
42 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
43
44 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
45 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
46 in that slot. */
47
48 static reloc_howto_type elf32_arm_howto_table[] =
49 {
50 /* No relocation */
51 HOWTO (R_ARM_NONE, /* type */
52 0, /* rightshift */
53 0, /* size (0 = byte, 1 = short, 2 = long) */
54 0, /* bitsize */
55 FALSE, /* pc_relative */
56 0, /* bitpos */
57 complain_overflow_dont,/* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_ARM_NONE", /* name */
60 FALSE, /* partial_inplace */
61 0, /* src_mask */
62 0, /* dst_mask */
63 FALSE), /* pcrel_offset */
64
65 HOWTO (R_ARM_PC24, /* type */
66 2, /* rightshift */
67 2, /* size (0 = byte, 1 = short, 2 = long) */
68 24, /* bitsize */
69 TRUE, /* pc_relative */
70 0, /* bitpos */
71 complain_overflow_signed,/* complain_on_overflow */
72 bfd_elf_generic_reloc, /* special_function */
73 "R_ARM_PC24", /* name */
74 FALSE, /* partial_inplace */
75 0x00ffffff, /* src_mask */
76 0x00ffffff, /* dst_mask */
77 TRUE), /* pcrel_offset */
78
79 /* 32 bit absolute */
80 HOWTO (R_ARM_ABS32, /* type */
81 0, /* rightshift */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
83 32, /* bitsize */
84 FALSE, /* pc_relative */
85 0, /* bitpos */
86 complain_overflow_bitfield,/* complain_on_overflow */
87 bfd_elf_generic_reloc, /* special_function */
88 "R_ARM_ABS32", /* name */
89 FALSE, /* partial_inplace */
90 0xffffffff, /* src_mask */
91 0xffffffff, /* dst_mask */
92 FALSE), /* pcrel_offset */
93
94 /* standard 32bit pc-relative reloc */
95 HOWTO (R_ARM_REL32, /* type */
96 0, /* rightshift */
97 2, /* size (0 = byte, 1 = short, 2 = long) */
98 32, /* bitsize */
99 TRUE, /* pc_relative */
100 0, /* bitpos */
101 complain_overflow_bitfield,/* complain_on_overflow */
102 bfd_elf_generic_reloc, /* special_function */
103 "R_ARM_REL32", /* name */
104 FALSE, /* partial_inplace */
105 0xffffffff, /* src_mask */
106 0xffffffff, /* dst_mask */
107 TRUE), /* pcrel_offset */
108
109 /* 8 bit absolute */
110 HOWTO (R_ARM_PC13, /* type */
111 0, /* rightshift */
112 0, /* size (0 = byte, 1 = short, 2 = long) */
113 8, /* bitsize */
114 FALSE, /* pc_relative */
115 0, /* bitpos */
116 complain_overflow_bitfield,/* complain_on_overflow */
117 bfd_elf_generic_reloc, /* special_function */
118 "R_ARM_PC13", /* name */
119 FALSE, /* partial_inplace */
120 0x000000ff, /* src_mask */
121 0x000000ff, /* dst_mask */
122 FALSE), /* pcrel_offset */
123
124 /* 16 bit absolute */
125 HOWTO (R_ARM_ABS16, /* type */
126 0, /* rightshift */
127 1, /* size (0 = byte, 1 = short, 2 = long) */
128 16, /* bitsize */
129 FALSE, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_bitfield,/* complain_on_overflow */
132 bfd_elf_generic_reloc, /* special_function */
133 "R_ARM_ABS16", /* name */
134 FALSE, /* partial_inplace */
135 0x0000ffff, /* src_mask */
136 0x0000ffff, /* dst_mask */
137 FALSE), /* pcrel_offset */
138
139 /* 12 bit absolute */
140 HOWTO (R_ARM_ABS12, /* type */
141 0, /* rightshift */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
143 12, /* bitsize */
144 FALSE, /* pc_relative */
145 0, /* bitpos */
146 complain_overflow_bitfield,/* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_ARM_ABS12", /* name */
149 FALSE, /* partial_inplace */
150 0x000008ff, /* src_mask */
151 0x000008ff, /* dst_mask */
152 FALSE), /* pcrel_offset */
153
154 HOWTO (R_ARM_THM_ABS5, /* type */
155 6, /* rightshift */
156 1, /* size (0 = byte, 1 = short, 2 = long) */
157 5, /* bitsize */
158 FALSE, /* pc_relative */
159 0, /* bitpos */
160 complain_overflow_bitfield,/* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_ARM_THM_ABS5", /* name */
163 FALSE, /* partial_inplace */
164 0x000007e0, /* src_mask */
165 0x000007e0, /* dst_mask */
166 FALSE), /* pcrel_offset */
167
168 /* 8 bit absolute */
169 HOWTO (R_ARM_ABS8, /* type */
170 0, /* rightshift */
171 0, /* size (0 = byte, 1 = short, 2 = long) */
172 8, /* bitsize */
173 FALSE, /* pc_relative */
174 0, /* bitpos */
175 complain_overflow_bitfield,/* complain_on_overflow */
176 bfd_elf_generic_reloc, /* special_function */
177 "R_ARM_ABS8", /* name */
178 FALSE, /* partial_inplace */
179 0x000000ff, /* src_mask */
180 0x000000ff, /* dst_mask */
181 FALSE), /* pcrel_offset */
182
183 HOWTO (R_ARM_SBREL32, /* type */
184 0, /* rightshift */
185 2, /* size (0 = byte, 1 = short, 2 = long) */
186 32, /* bitsize */
187 FALSE, /* pc_relative */
188 0, /* bitpos */
189 complain_overflow_dont,/* complain_on_overflow */
190 bfd_elf_generic_reloc, /* special_function */
191 "R_ARM_SBREL32", /* name */
192 FALSE, /* partial_inplace */
193 0xffffffff, /* src_mask */
194 0xffffffff, /* dst_mask */
195 FALSE), /* pcrel_offset */
196
197 HOWTO (R_ARM_THM_PC22, /* type */
198 1, /* rightshift */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
200 23, /* bitsize */
201 TRUE, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_signed,/* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_ARM_THM_PC22", /* name */
206 FALSE, /* partial_inplace */
207 0x07ff07ff, /* src_mask */
208 0x07ff07ff, /* dst_mask */
209 TRUE), /* pcrel_offset */
210
211 HOWTO (R_ARM_THM_PC8, /* type */
212 1, /* rightshift */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
214 8, /* bitsize */
215 TRUE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_signed,/* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_ARM_THM_PC8", /* name */
220 FALSE, /* partial_inplace */
221 0x000000ff, /* src_mask */
222 0x000000ff, /* dst_mask */
223 TRUE), /* pcrel_offset */
224
225 HOWTO (R_ARM_AMP_VCALL9, /* type */
226 1, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 8, /* bitsize */
229 TRUE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_signed,/* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_ARM_AMP_VCALL9", /* name */
234 FALSE, /* partial_inplace */
235 0x000000ff, /* src_mask */
236 0x000000ff, /* dst_mask */
237 TRUE), /* pcrel_offset */
238
239 HOWTO (R_ARM_SWI24, /* type */
240 0, /* rightshift */
241 0, /* size (0 = byte, 1 = short, 2 = long) */
242 0, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_signed,/* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_ARM_SWI24", /* name */
248 FALSE, /* partial_inplace */
249 0x00000000, /* src_mask */
250 0x00000000, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 HOWTO (R_ARM_THM_SWI8, /* type */
254 0, /* rightshift */
255 0, /* size (0 = byte, 1 = short, 2 = long) */
256 0, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_signed,/* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_ARM_SWI8", /* name */
262 FALSE, /* partial_inplace */
263 0x00000000, /* src_mask */
264 0x00000000, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* BLX instruction for the ARM. */
268 HOWTO (R_ARM_XPC25, /* type */
269 2, /* rightshift */
270 2, /* size (0 = byte, 1 = short, 2 = long) */
271 25, /* bitsize */
272 TRUE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_signed,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_ARM_XPC25", /* name */
277 FALSE, /* partial_inplace */
278 0x00ffffff, /* src_mask */
279 0x00ffffff, /* dst_mask */
280 TRUE), /* pcrel_offset */
281
282 /* BLX instruction for the Thumb. */
283 HOWTO (R_ARM_THM_XPC22, /* type */
284 2, /* rightshift */
285 2, /* size (0 = byte, 1 = short, 2 = long) */
286 22, /* bitsize */
287 TRUE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_signed,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_ARM_THM_XPC22", /* name */
292 FALSE, /* partial_inplace */
293 0x07ff07ff, /* src_mask */
294 0x07ff07ff, /* dst_mask */
295 TRUE), /* pcrel_offset */
296
297 /* These next three relocs are not defined, but we need to fill the space. */
298
299 HOWTO (R_ARM_NONE, /* type */
300 0, /* rightshift */
301 0, /* size (0 = byte, 1 = short, 2 = long) */
302 0, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_dont,/* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_ARM_unknown_17", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 HOWTO (R_ARM_NONE, /* type */
314 0, /* rightshift */
315 0, /* size (0 = byte, 1 = short, 2 = long) */
316 0, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_dont,/* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_ARM_unknown_18", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 HOWTO (R_ARM_NONE, /* type */
328 0, /* rightshift */
329 0, /* size (0 = byte, 1 = short, 2 = long) */
330 0, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_dont,/* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 "R_ARM_unknown_19", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* Relocs used in ARM Linux */
342
343 HOWTO (R_ARM_COPY, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 32, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_bitfield,/* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_ARM_COPY", /* name */
352 TRUE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 FALSE), /* pcrel_offset */
356
357 HOWTO (R_ARM_GLOB_DAT, /* type */
358 0, /* rightshift */
359 2, /* size (0 = byte, 1 = short, 2 = long) */
360 32, /* bitsize */
361 FALSE, /* pc_relative */
362 0, /* bitpos */
363 complain_overflow_bitfield,/* complain_on_overflow */
364 bfd_elf_generic_reloc, /* special_function */
365 "R_ARM_GLOB_DAT", /* name */
366 TRUE, /* partial_inplace */
367 0xffffffff, /* src_mask */
368 0xffffffff, /* dst_mask */
369 FALSE), /* pcrel_offset */
370
371 HOWTO (R_ARM_JUMP_SLOT, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 32, /* bitsize */
375 FALSE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_bitfield,/* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_ARM_JUMP_SLOT", /* name */
380 TRUE, /* partial_inplace */
381 0xffffffff, /* src_mask */
382 0xffffffff, /* dst_mask */
383 FALSE), /* pcrel_offset */
384
385 HOWTO (R_ARM_RELATIVE, /* type */
386 0, /* rightshift */
387 2, /* size (0 = byte, 1 = short, 2 = long) */
388 32, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_bitfield,/* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_ARM_RELATIVE", /* name */
394 TRUE, /* partial_inplace */
395 0xffffffff, /* src_mask */
396 0xffffffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 HOWTO (R_ARM_GOTOFF, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 32, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_bitfield,/* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_ARM_GOTOFF", /* name */
408 TRUE, /* partial_inplace */
409 0xffffffff, /* src_mask */
410 0xffffffff, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 HOWTO (R_ARM_GOTPC, /* type */
414 0, /* rightshift */
415 2, /* size (0 = byte, 1 = short, 2 = long) */
416 32, /* bitsize */
417 TRUE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_bitfield,/* complain_on_overflow */
420 bfd_elf_generic_reloc, /* special_function */
421 "R_ARM_GOTPC", /* name */
422 TRUE, /* partial_inplace */
423 0xffffffff, /* src_mask */
424 0xffffffff, /* dst_mask */
425 TRUE), /* pcrel_offset */
426
427 HOWTO (R_ARM_GOT32, /* type */
428 0, /* rightshift */
429 2, /* size (0 = byte, 1 = short, 2 = long) */
430 32, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_bitfield,/* complain_on_overflow */
434 bfd_elf_generic_reloc, /* special_function */
435 "R_ARM_GOT32", /* name */
436 TRUE, /* partial_inplace */
437 0xffffffff, /* src_mask */
438 0xffffffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 HOWTO (R_ARM_PLT32, /* type */
442 2, /* rightshift */
443 2, /* size (0 = byte, 1 = short, 2 = long) */
444 26, /* bitsize */
445 TRUE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_bitfield,/* complain_on_overflow */
448 bfd_elf_generic_reloc, /* special_function */
449 "R_ARM_PLT32", /* name */
450 TRUE, /* partial_inplace */
451 0x00ffffff, /* src_mask */
452 0x00ffffff, /* dst_mask */
453 TRUE), /* pcrel_offset */
454
455 HOWTO (R_ARM_CALL, /* type */
456 2, /* rightshift */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
458 24, /* bitsize */
459 TRUE, /* pc_relative */
460 0, /* bitpos */
461 complain_overflow_signed,/* complain_on_overflow */
462 bfd_elf_generic_reloc, /* special_function */
463 "R_ARM_CALL", /* name */
464 FALSE, /* partial_inplace */
465 0x00ffffff, /* src_mask */
466 0x00ffffff, /* dst_mask */
467 TRUE), /* pcrel_offset */
468
469 HOWTO (R_ARM_JUMP24, /* type */
470 2, /* rightshift */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
472 24, /* bitsize */
473 TRUE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_signed,/* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_ARM_JUMP24", /* name */
478 FALSE, /* partial_inplace */
479 0x00ffffff, /* src_mask */
480 0x00ffffff, /* dst_mask */
481 TRUE), /* pcrel_offset */
482
483 HOWTO (R_ARM_NONE, /* type */
484 0, /* rightshift */
485 0, /* size (0 = byte, 1 = short, 2 = long) */
486 0, /* bitsize */
487 FALSE, /* pc_relative */
488 0, /* bitpos */
489 complain_overflow_dont,/* complain_on_overflow */
490 bfd_elf_generic_reloc, /* special_function */
491 "R_ARM_unknown_30", /* name */
492 FALSE, /* partial_inplace */
493 0, /* src_mask */
494 0, /* dst_mask */
495 FALSE), /* pcrel_offset */
496
497 HOWTO (R_ARM_NONE, /* type */
498 0, /* rightshift */
499 0, /* size (0 = byte, 1 = short, 2 = long) */
500 0, /* bitsize */
501 FALSE, /* pc_relative */
502 0, /* bitpos */
503 complain_overflow_dont,/* complain_on_overflow */
504 bfd_elf_generic_reloc, /* special_function */
505 "R_ARM_unknown_31", /* name */
506 FALSE, /* partial_inplace */
507 0, /* src_mask */
508 0, /* dst_mask */
509 FALSE), /* pcrel_offset */
510
511 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
512 0, /* rightshift */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
514 12, /* bitsize */
515 TRUE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont,/* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 "R_ARM_ALU_PCREL_7_0", /* name */
520 FALSE, /* partial_inplace */
521 0x00000fff, /* src_mask */
522 0x00000fff, /* dst_mask */
523 TRUE), /* pcrel_offset */
524
525 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 12, /* bitsize */
529 TRUE, /* pc_relative */
530 8, /* bitpos */
531 complain_overflow_dont,/* complain_on_overflow */
532 bfd_elf_generic_reloc, /* special_function */
533 "R_ARM_ALU_PCREL_15_8",/* name */
534 FALSE, /* partial_inplace */
535 0x00000fff, /* src_mask */
536 0x00000fff, /* dst_mask */
537 TRUE), /* pcrel_offset */
538
539 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
540 0, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 12, /* bitsize */
543 TRUE, /* pc_relative */
544 16, /* bitpos */
545 complain_overflow_dont,/* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_ARM_ALU_PCREL_23_15",/* name */
548 FALSE, /* partial_inplace */
549 0x00000fff, /* src_mask */
550 0x00000fff, /* dst_mask */
551 TRUE), /* pcrel_offset */
552
553 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
554 0, /* rightshift */
555 2, /* size (0 = byte, 1 = short, 2 = long) */
556 12, /* bitsize */
557 FALSE, /* pc_relative */
558 0, /* bitpos */
559 complain_overflow_dont,/* complain_on_overflow */
560 bfd_elf_generic_reloc, /* special_function */
561 "R_ARM_LDR_SBREL_11_0",/* name */
562 FALSE, /* partial_inplace */
563 0x00000fff, /* src_mask */
564 0x00000fff, /* dst_mask */
565 FALSE), /* pcrel_offset */
566
567 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
568 0, /* rightshift */
569 2, /* size (0 = byte, 1 = short, 2 = long) */
570 8, /* bitsize */
571 FALSE, /* pc_relative */
572 12, /* bitpos */
573 complain_overflow_dont,/* complain_on_overflow */
574 bfd_elf_generic_reloc, /* special_function */
575 "R_ARM_ALU_SBREL_19_12",/* name */
576 FALSE, /* partial_inplace */
577 0x000ff000, /* src_mask */
578 0x000ff000, /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
582 0, /* rightshift */
583 2, /* size (0 = byte, 1 = short, 2 = long) */
584 8, /* bitsize */
585 FALSE, /* pc_relative */
586 20, /* bitpos */
587 complain_overflow_dont,/* complain_on_overflow */
588 bfd_elf_generic_reloc, /* special_function */
589 "R_ARM_ALU_SBREL_27_20",/* name */
590 FALSE, /* partial_inplace */
591 0x0ff00000, /* src_mask */
592 0x0ff00000, /* dst_mask */
593 FALSE), /* pcrel_offset */
594
595 HOWTO (R_ARM_TARGET1, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont,/* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_ARM_TARGET1", /* name */
604 FALSE, /* partial_inplace */
605 0xffffffff, /* src_mask */
606 0xffffffff, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 HOWTO (R_ARM_ROSEGREL32, /* type */
610 0, /* rightshift */
611 2, /* size (0 = byte, 1 = short, 2 = long) */
612 32, /* bitsize */
613 FALSE, /* pc_relative */
614 0, /* bitpos */
615 complain_overflow_dont,/* complain_on_overflow */
616 bfd_elf_generic_reloc, /* special_function */
617 "R_ARM_ROSEGREL32", /* name */
618 FALSE, /* partial_inplace */
619 0xffffffff, /* src_mask */
620 0xffffffff, /* dst_mask */
621 FALSE), /* pcrel_offset */
622
623 HOWTO (R_ARM_V4BX, /* type */
624 0, /* rightshift */
625 2, /* size (0 = byte, 1 = short, 2 = long) */
626 32, /* bitsize */
627 FALSE, /* pc_relative */
628 0, /* bitpos */
629 complain_overflow_dont,/* complain_on_overflow */
630 bfd_elf_generic_reloc, /* special_function */
631 "R_ARM_V4BX", /* name */
632 FALSE, /* partial_inplace */
633 0xffffffff, /* src_mask */
634 0xffffffff, /* dst_mask */
635 FALSE), /* pcrel_offset */
636
637 HOWTO (R_ARM_TARGET2, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed,/* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_ARM_TARGET2", /* name */
646 FALSE, /* partial_inplace */
647 0xffffffff, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 HOWTO (R_ARM_PREL31, /* type */
652 0, /* rightshift */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
654 31, /* bitsize */
655 TRUE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_signed,/* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_ARM_PREL31", /* name */
660 FALSE, /* partial_inplace */
661 0x7fffffff, /* src_mask */
662 0x7fffffff, /* dst_mask */
663 TRUE), /* pcrel_offset */
664 };
665
666 /* GNU extension to record C++ vtable hierarchy */
667 static reloc_howto_type elf32_arm_vtinherit_howto =
668 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
669 0, /* rightshift */
670 2, /* size (0 = byte, 1 = short, 2 = long) */
671 0, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 NULL, /* special_function */
676 "R_ARM_GNU_VTINHERIT", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0, /* dst_mask */
680 FALSE); /* pcrel_offset */
681
682 /* GNU extension to record C++ vtable member usage */
683 static reloc_howto_type elf32_arm_vtentry_howto =
684 HOWTO (R_ARM_GNU_VTENTRY, /* type */
685 0, /* rightshift */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
687 0, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_dont, /* complain_on_overflow */
691 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
692 "R_ARM_GNU_VTENTRY", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0, /* dst_mask */
696 FALSE); /* pcrel_offset */
697
698 /* 12 bit pc relative */
699 static reloc_howto_type elf32_arm_thm_pc11_howto =
700 HOWTO (R_ARM_THM_PC11, /* type */
701 1, /* rightshift */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
703 11, /* bitsize */
704 TRUE, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_signed, /* complain_on_overflow */
707 bfd_elf_generic_reloc, /* special_function */
708 "R_ARM_THM_PC11", /* name */
709 FALSE, /* partial_inplace */
710 0x000007ff, /* src_mask */
711 0x000007ff, /* dst_mask */
712 TRUE); /* pcrel_offset */
713
714 /* 12 bit pc relative */
715 static reloc_howto_type elf32_arm_thm_pc9_howto =
716 HOWTO (R_ARM_THM_PC9, /* type */
717 1, /* rightshift */
718 1, /* size (0 = byte, 1 = short, 2 = long) */
719 8, /* bitsize */
720 TRUE, /* pc_relative */
721 0, /* bitpos */
722 complain_overflow_signed, /* complain_on_overflow */
723 bfd_elf_generic_reloc, /* special_function */
724 "R_ARM_THM_PC9", /* name */
725 FALSE, /* partial_inplace */
726 0x000000ff, /* src_mask */
727 0x000000ff, /* dst_mask */
728 TRUE); /* pcrel_offset */
729
730 /* Place relative GOT-indirect. */
731 static reloc_howto_type elf32_arm_got_prel =
732 HOWTO (R_ARM_GOT_PREL, /* type */
733 0, /* rightshift */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
735 32, /* bitsize */
736 TRUE, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_dont, /* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_ARM_GOT_PREL", /* name */
741 FALSE, /* partial_inplace */
742 0xffffffff, /* src_mask */
743 0xffffffff, /* dst_mask */
744 TRUE); /* pcrel_offset */
745
746 /* Currently unused relocations. */
747 static reloc_howto_type elf32_arm_r_howto[4] =
748 {
749 HOWTO (R_ARM_RREL32, /* type */
750 0, /* rightshift */
751 0, /* size (0 = byte, 1 = short, 2 = long) */
752 0, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont,/* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_ARM_RREL32", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 HOWTO (R_ARM_RABS32, /* type */
764 0, /* rightshift */
765 0, /* size (0 = byte, 1 = short, 2 = long) */
766 0, /* bitsize */
767 FALSE, /* pc_relative */
768 0, /* bitpos */
769 complain_overflow_dont,/* complain_on_overflow */
770 bfd_elf_generic_reloc, /* special_function */
771 "R_ARM_RABS32", /* name */
772 FALSE, /* partial_inplace */
773 0, /* src_mask */
774 0, /* dst_mask */
775 FALSE), /* pcrel_offset */
776
777 HOWTO (R_ARM_RPC24, /* type */
778 0, /* rightshift */
779 0, /* size (0 = byte, 1 = short, 2 = long) */
780 0, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont,/* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_ARM_RPC24", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 HOWTO (R_ARM_RBASE, /* type */
792 0, /* rightshift */
793 0, /* size (0 = byte, 1 = short, 2 = long) */
794 0, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont,/* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_ARM_RBASE", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0, /* dst_mask */
803 FALSE) /* pcrel_offset */
804 };
805
806 static reloc_howto_type *
807 elf32_arm_howto_from_type (unsigned int r_type)
808 {
809 if (r_type < NUM_ELEM (elf32_arm_howto_table))
810 return &elf32_arm_howto_table[r_type];
811
812 switch (r_type)
813 {
814 case R_ARM_GOT_PREL:
815 return &elf32_arm_got_prel;
816
817 case R_ARM_GNU_VTINHERIT:
818 return &elf32_arm_vtinherit_howto;
819
820 case R_ARM_GNU_VTENTRY:
821 return &elf32_arm_vtentry_howto;
822
823 case R_ARM_THM_PC11:
824 return &elf32_arm_thm_pc11_howto;
825
826 case R_ARM_THM_PC9:
827 return &elf32_arm_thm_pc9_howto;
828
829 case R_ARM_RREL32:
830 case R_ARM_RABS32:
831 case R_ARM_RPC24:
832 case R_ARM_RBASE:
833 return &elf32_arm_r_howto[r_type - R_ARM_RREL32];
834
835 default:
836 return NULL;
837 }
838 }
839
840 static void
841 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
842 Elf_Internal_Rela * elf_reloc)
843 {
844 unsigned int r_type;
845
846 r_type = ELF32_R_TYPE (elf_reloc->r_info);
847 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
848 }
849
850 struct elf32_arm_reloc_map
851 {
852 bfd_reloc_code_real_type bfd_reloc_val;
853 unsigned char elf_reloc_val;
854 };
855
856 /* All entries in this list must also be present in elf32_arm_howto_table. */
857 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
858 {
859 {BFD_RELOC_NONE, R_ARM_NONE},
860 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
861 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
862 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
863 {BFD_RELOC_32, R_ARM_ABS32},
864 {BFD_RELOC_32_PCREL, R_ARM_REL32},
865 {BFD_RELOC_8, R_ARM_ABS8},
866 {BFD_RELOC_16, R_ARM_ABS16},
867 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
868 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
869 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22},
870 {BFD_RELOC_ARM_COPY, R_ARM_COPY},
871 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
872 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
873 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
874 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF},
875 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
876 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
877 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
878 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
879 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
880 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
881 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
882 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}
883 };
884
885 static reloc_howto_type *
886 elf32_arm_reloc_type_lookup (abfd, code)
887 bfd *abfd ATTRIBUTE_UNUSED;
888 bfd_reloc_code_real_type code;
889 {
890 unsigned int i;
891
892 switch (code)
893 {
894 case BFD_RELOC_VTABLE_INHERIT:
895 return & elf32_arm_vtinherit_howto;
896
897 case BFD_RELOC_VTABLE_ENTRY:
898 return & elf32_arm_vtentry_howto;
899
900 case BFD_RELOC_THUMB_PCREL_BRANCH12:
901 return & elf32_arm_thm_pc11_howto;
902
903 case BFD_RELOC_THUMB_PCREL_BRANCH9:
904 return & elf32_arm_thm_pc9_howto;
905
906 default:
907 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
908 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
909 return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
910
911 return NULL;
912 }
913 }
914
915 /* Support for core dump NOTE sections */
916 static bfd_boolean
917 elf32_arm_nabi_grok_prstatus (abfd, note)
918 bfd *abfd;
919 Elf_Internal_Note *note;
920 {
921 int offset;
922 size_t size;
923
924 switch (note->descsz)
925 {
926 default:
927 return FALSE;
928
929 case 148: /* Linux/ARM 32-bit*/
930 /* pr_cursig */
931 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
932
933 /* pr_pid */
934 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
935
936 /* pr_reg */
937 offset = 72;
938 size = 72;
939
940 break;
941 }
942
943 /* Make a ".reg/999" section. */
944 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
945 size, note->descpos + offset);
946 }
947
948 static bfd_boolean
949 elf32_arm_nabi_grok_psinfo (abfd, note)
950 bfd *abfd;
951 Elf_Internal_Note *note;
952 {
953 switch (note->descsz)
954 {
955 default:
956 return FALSE;
957
958 case 124: /* Linux/ARM elf_prpsinfo */
959 elf_tdata (abfd)->core_program
960 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
961 elf_tdata (abfd)->core_command
962 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
963 }
964
965 /* Note that for some reason, a spurious space is tacked
966 onto the end of the args in some (at least one anyway)
967 implementations, so strip it off if it exists. */
968
969 {
970 char *command = elf_tdata (abfd)->core_command;
971 int n = strlen (command);
972
973 if (0 < n && command[n - 1] == ' ')
974 command[n - 1] = '\0';
975 }
976
977 return TRUE;
978 }
979
980 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
981 #define TARGET_LITTLE_NAME "elf32-littlearm"
982 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
983 #define TARGET_BIG_NAME "elf32-bigarm"
984
985 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
986 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
987
988 typedef unsigned long int insn32;
989 typedef unsigned short int insn16;
990
991 /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
992 #define INTERWORK_FLAG(abfd) \
993 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
994 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
995
996 /* The linker script knows the section names for placement.
997 The entry_names are used to do simple name mangling on the stubs.
998 Given a function name, and its type, the stub can be found. The
999 name can be changed. The only requirement is the %s be present. */
1000 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1001 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1002
1003 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1004 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1005
1006 /* The name of the dynamic interpreter. This is put in the .interp
1007 section. */
1008 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1009
1010 #ifdef FOUR_WORD_PLT
1011
1012 /* The first entry in a procedure linkage table looks like
1013 this. It is set up so that any shared library function that is
1014 called before the relocation has been set up calls the dynamic
1015 linker first. */
1016 static const bfd_vma elf32_arm_plt0_entry [] =
1017 {
1018 0xe52de004, /* str lr, [sp, #-4]! */
1019 0xe59fe010, /* ldr lr, [pc, #16] */
1020 0xe08fe00e, /* add lr, pc, lr */
1021 0xe5bef008, /* ldr pc, [lr, #8]! */
1022 };
1023
1024 /* Subsequent entries in a procedure linkage table look like
1025 this. */
1026 static const bfd_vma elf32_arm_plt_entry [] =
1027 {
1028 0xe28fc600, /* add ip, pc, #NN */
1029 0xe28cca00, /* add ip, ip, #NN */
1030 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1031 0x00000000, /* unused */
1032 };
1033
1034 #else
1035
1036 /* The first entry in a procedure linkage table looks like
1037 this. It is set up so that any shared library function that is
1038 called before the relocation has been set up calls the dynamic
1039 linker first. */
1040 static const bfd_vma elf32_arm_plt0_entry [] =
1041 {
1042 0xe52de004, /* str lr, [sp, #-4]! */
1043 0xe59fe004, /* ldr lr, [pc, #4] */
1044 0xe08fe00e, /* add lr, pc, lr */
1045 0xe5bef008, /* ldr pc, [lr, #8]! */
1046 0x00000000, /* &GOT[0] - . */
1047 };
1048
1049 /* Subsequent entries in a procedure linkage table look like
1050 this. */
1051 static const bfd_vma elf32_arm_plt_entry [] =
1052 {
1053 0xe28fc600, /* add ip, pc, #0xNN00000 */
1054 0xe28cca00, /* add ip, ip, #0xNN000 */
1055 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1056 };
1057
1058 #endif
1059
1060 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1061 #define PLT_THUMB_STUB_SIZE 4
1062 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1063 {
1064 0x4778, /* bx pc */
1065 0x46c0 /* nop */
1066 };
1067
1068 /* The entries in a PLT when using a DLL-based target with multiple
1069 address spaces. */
1070 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1071 {
1072 0xe51ff004, /* ldr pc, [pc, #-4] */
1073 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1074 };
1075
1076 /* Used to build a map of a section. This is required for mixed-endian
1077 code/data. */
1078
1079 typedef struct elf32_elf_section_map
1080 {
1081 bfd_vma vma;
1082 char type;
1083 }
1084 elf32_arm_section_map;
1085
1086 struct _arm_elf_section_data
1087 {
1088 struct bfd_elf_section_data elf;
1089 int mapcount;
1090 elf32_arm_section_map *map;
1091 };
1092
1093 #define elf32_arm_section_data(sec) \
1094 ((struct _arm_elf_section_data *) elf_section_data (sec))
1095
1096 /* The ARM linker needs to keep track of the number of relocs that it
1097 decides to copy in check_relocs for each symbol. This is so that
1098 it can discard PC relative relocs if it doesn't need them when
1099 linking with -Bsymbolic. We store the information in a field
1100 extending the regular ELF linker hash table. */
1101
1102 /* This structure keeps track of the number of PC relative relocs we
1103 have copied for a given symbol. */
1104 struct elf32_arm_relocs_copied
1105 {
1106 /* Next section. */
1107 struct elf32_arm_relocs_copied * next;
1108 /* A section in dynobj. */
1109 asection * section;
1110 /* Number of relocs copied in this section. */
1111 bfd_size_type count;
1112 };
1113
1114 /* Arm ELF linker hash entry. */
1115 struct elf32_arm_link_hash_entry
1116 {
1117 struct elf_link_hash_entry root;
1118
1119 /* Number of PC relative relocs copied for this symbol. */
1120 struct elf32_arm_relocs_copied * relocs_copied;
1121
1122 /* We reference count Thumb references to a PLT entry separately,
1123 so that we can emit the Thumb trampoline only if needed. */
1124 bfd_signed_vma plt_thumb_refcount;
1125
1126 /* Since PLT entries have variable size if the Thumb prologue is
1127 used, we need to record the index into .got.plt instead of
1128 recomputing it from the PLT offset. */
1129 bfd_signed_vma plt_got_offset;
1130 };
1131
1132 /* Traverse an arm ELF linker hash table. */
1133 #define elf32_arm_link_hash_traverse(table, func, info) \
1134 (elf_link_hash_traverse \
1135 (&(table)->root, \
1136 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1137 (info)))
1138
1139 /* Get the ARM elf linker hash table from a link_info structure. */
1140 #define elf32_arm_hash_table(info) \
1141 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1142
1143 /* ARM ELF linker hash table. */
1144 struct elf32_arm_link_hash_table
1145 {
1146 /* The main hash table. */
1147 struct elf_link_hash_table root;
1148
1149 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1150 bfd_size_type thumb_glue_size;
1151
1152 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1153 bfd_size_type arm_glue_size;
1154
1155 /* An arbitrary input BFD chosen to hold the glue sections. */
1156 bfd * bfd_of_glue_owner;
1157
1158 /* Nonzero to output a BE8 image. */
1159 int byteswap_code;
1160
1161 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1162 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1163 int target1_is_rel;
1164
1165 /* The relocation to use for R_ARM_TARGET2 relocations. */
1166 int target2_reloc;
1167
1168 /* Nonzero to fix BX instructions for ARMv4 targets. */
1169 int fix_v4bx;
1170
1171 /* The number of bytes in the initial entry in the PLT. */
1172 bfd_size_type plt_header_size;
1173
1174 /* The number of bytes in the subsequent PLT etries. */
1175 bfd_size_type plt_entry_size;
1176
1177 /* True if the target system is Symbian OS. */
1178 int symbian_p;
1179
1180 /* True if the target uses REL relocations. */
1181 int use_rel;
1182
1183 /* Short-cuts to get to dynamic linker sections. */
1184 asection *sgot;
1185 asection *sgotplt;
1186 asection *srelgot;
1187 asection *splt;
1188 asection *srelplt;
1189 asection *sdynbss;
1190 asection *srelbss;
1191
1192 /* Small local sym to section mapping cache. */
1193 struct sym_sec_cache sym_sec;
1194
1195 /* For convenience in allocate_dynrelocs. */
1196 bfd * obfd;
1197 };
1198
1199 /* Create an entry in an ARM ELF linker hash table. */
1200
1201 static struct bfd_hash_entry *
1202 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1203 struct bfd_hash_table * table,
1204 const char * string)
1205 {
1206 struct elf32_arm_link_hash_entry * ret =
1207 (struct elf32_arm_link_hash_entry *) entry;
1208
1209 /* Allocate the structure if it has not already been allocated by a
1210 subclass. */
1211 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1212 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1213 if (ret == NULL)
1214 return (struct bfd_hash_entry *) ret;
1215
1216 /* Call the allocation method of the superclass. */
1217 ret = ((struct elf32_arm_link_hash_entry *)
1218 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1219 table, string));
1220 if (ret != NULL)
1221 {
1222 ret->relocs_copied = NULL;
1223 ret->plt_thumb_refcount = 0;
1224 ret->plt_got_offset = -1;
1225 }
1226
1227 return (struct bfd_hash_entry *) ret;
1228 }
1229
1230 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1231 shortcuts to them in our hash table. */
1232
1233 static bfd_boolean
1234 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1235 {
1236 struct elf32_arm_link_hash_table *htab;
1237
1238 htab = elf32_arm_hash_table (info);
1239 /* BPABI objects never have a GOT, or associated sections. */
1240 if (htab->symbian_p)
1241 return TRUE;
1242
1243 if (! _bfd_elf_create_got_section (dynobj, info))
1244 return FALSE;
1245
1246 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1247 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1248 if (!htab->sgot || !htab->sgotplt)
1249 abort ();
1250
1251 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
1252 if (htab->srelgot == NULL
1253 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1254 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1255 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1256 | SEC_READONLY))
1257 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1258 return FALSE;
1259 return TRUE;
1260 }
1261
1262 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1263 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1264 hash table. */
1265
1266 static bfd_boolean
1267 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1268 {
1269 struct elf32_arm_link_hash_table *htab;
1270
1271 htab = elf32_arm_hash_table (info);
1272 if (!htab->sgot && !create_got_section (dynobj, info))
1273 return FALSE;
1274
1275 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1276 return FALSE;
1277
1278 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1279 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1280 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1281 if (!info->shared)
1282 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1283
1284 if (!htab->splt
1285 || !htab->srelplt
1286 || !htab->sdynbss
1287 || (!info->shared && !htab->srelbss))
1288 abort ();
1289
1290 return TRUE;
1291 }
1292
1293 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1294
1295 static void
1296 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1297 struct elf_link_hash_entry *dir,
1298 struct elf_link_hash_entry *ind)
1299 {
1300 struct elf32_arm_link_hash_entry *edir, *eind;
1301
1302 edir = (struct elf32_arm_link_hash_entry *) dir;
1303 eind = (struct elf32_arm_link_hash_entry *) ind;
1304
1305 if (eind->relocs_copied != NULL)
1306 {
1307 if (edir->relocs_copied != NULL)
1308 {
1309 struct elf32_arm_relocs_copied **pp;
1310 struct elf32_arm_relocs_copied *p;
1311
1312 if (ind->root.type == bfd_link_hash_indirect)
1313 abort ();
1314
1315 /* Add reloc counts against the weak sym to the strong sym
1316 list. Merge any entries against the same section. */
1317 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1318 {
1319 struct elf32_arm_relocs_copied *q;
1320
1321 for (q = edir->relocs_copied; q != NULL; q = q->next)
1322 if (q->section == p->section)
1323 {
1324 q->count += p->count;
1325 *pp = p->next;
1326 break;
1327 }
1328 if (q == NULL)
1329 pp = &p->next;
1330 }
1331 *pp = edir->relocs_copied;
1332 }
1333
1334 edir->relocs_copied = eind->relocs_copied;
1335 eind->relocs_copied = NULL;
1336 }
1337
1338 /* If the direct symbol already has an associated PLT entry, the
1339 indirect symbol should not. If it doesn't, swap refcount information
1340 from the indirect symbol. */
1341 if (edir->plt_thumb_refcount == 0)
1342 {
1343 edir->plt_thumb_refcount = eind->plt_thumb_refcount;
1344 eind->plt_thumb_refcount = 0;
1345 }
1346 else
1347 BFD_ASSERT (eind->plt_thumb_refcount == 0);
1348
1349 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1350 }
1351
1352 /* Create an ARM elf linker hash table. */
1353
1354 static struct bfd_link_hash_table *
1355 elf32_arm_link_hash_table_create (bfd *abfd)
1356 {
1357 struct elf32_arm_link_hash_table *ret;
1358 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1359
1360 ret = bfd_malloc (amt);
1361 if (ret == NULL)
1362 return NULL;
1363
1364 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1365 elf32_arm_link_hash_newfunc))
1366 {
1367 free (ret);
1368 return NULL;
1369 }
1370
1371 ret->sgot = NULL;
1372 ret->sgotplt = NULL;
1373 ret->srelgot = NULL;
1374 ret->splt = NULL;
1375 ret->srelplt = NULL;
1376 ret->sdynbss = NULL;
1377 ret->srelbss = NULL;
1378 ret->thumb_glue_size = 0;
1379 ret->arm_glue_size = 0;
1380 ret->bfd_of_glue_owner = NULL;
1381 ret->byteswap_code = 0;
1382 ret->target1_is_rel = 0;
1383 ret->target2_reloc = R_ARM_NONE;
1384 #ifdef FOUR_WORD_PLT
1385 ret->plt_header_size = 16;
1386 ret->plt_entry_size = 16;
1387 #else
1388 ret->plt_header_size = 20;
1389 ret->plt_entry_size = 12;
1390 #endif
1391 ret->symbian_p = 0;
1392 ret->use_rel = 1;
1393 ret->sym_sec.abfd = NULL;
1394 ret->obfd = abfd;
1395
1396 return &ret->root.root;
1397 }
1398
1399 /* Locate the Thumb encoded calling stub for NAME. */
1400
1401 static struct elf_link_hash_entry *
1402 find_thumb_glue (struct bfd_link_info *link_info,
1403 const char *name,
1404 bfd *input_bfd)
1405 {
1406 char *tmp_name;
1407 struct elf_link_hash_entry *hash;
1408 struct elf32_arm_link_hash_table *hash_table;
1409
1410 /* We need a pointer to the armelf specific hash table. */
1411 hash_table = elf32_arm_hash_table (link_info);
1412
1413 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1414 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1415
1416 BFD_ASSERT (tmp_name);
1417
1418 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1419
1420 hash = elf_link_hash_lookup
1421 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1422
1423 if (hash == NULL)
1424 /* xgettext:c-format */
1425 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1426 input_bfd, tmp_name, name);
1427
1428 free (tmp_name);
1429
1430 return hash;
1431 }
1432
1433 /* Locate the ARM encoded calling stub for NAME. */
1434
1435 static struct elf_link_hash_entry *
1436 find_arm_glue (struct bfd_link_info *link_info,
1437 const char *name,
1438 bfd *input_bfd)
1439 {
1440 char *tmp_name;
1441 struct elf_link_hash_entry *myh;
1442 struct elf32_arm_link_hash_table *hash_table;
1443
1444 /* We need a pointer to the elfarm specific hash table. */
1445 hash_table = elf32_arm_hash_table (link_info);
1446
1447 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1448 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1449
1450 BFD_ASSERT (tmp_name);
1451
1452 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1453
1454 myh = elf_link_hash_lookup
1455 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1456
1457 if (myh == NULL)
1458 /* xgettext:c-format */
1459 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1460 input_bfd, tmp_name, name);
1461
1462 free (tmp_name);
1463
1464 return myh;
1465 }
1466
1467 /* ARM->Thumb glue:
1468
1469 .arm
1470 __func_from_arm:
1471 ldr r12, __func_addr
1472 bx r12
1473 __func_addr:
1474 .word func @ behave as if you saw a ARM_32 reloc. */
1475
1476 #define ARM2THUMB_GLUE_SIZE 12
1477 static const insn32 a2t1_ldr_insn = 0xe59fc000;
1478 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1479 static const insn32 a2t3_func_addr_insn = 0x00000001;
1480
1481 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1482
1483 .thumb .thumb
1484 .align 2 .align 2
1485 __func_from_thumb: __func_from_thumb:
1486 bx pc push {r6, lr}
1487 nop ldr r6, __func_addr
1488 .arm mov lr, pc
1489 __func_change_to_arm: bx r6
1490 b func .arm
1491 __func_back_to_thumb:
1492 ldmia r13! {r6, lr}
1493 bx lr
1494 __func_addr:
1495 .word func */
1496
1497 #define THUMB2ARM_GLUE_SIZE 8
1498 static const insn16 t2a1_bx_pc_insn = 0x4778;
1499 static const insn16 t2a2_noop_insn = 0x46c0;
1500 static const insn32 t2a3_b_insn = 0xea000000;
1501
1502 #ifndef ELFARM_NABI_C_INCLUDED
1503 bfd_boolean
1504 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
1505 {
1506 asection * s;
1507 bfd_byte * foo;
1508 struct elf32_arm_link_hash_table * globals;
1509
1510 globals = elf32_arm_hash_table (info);
1511
1512 BFD_ASSERT (globals != NULL);
1513
1514 if (globals->arm_glue_size != 0)
1515 {
1516 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1517
1518 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1519 ARM2THUMB_GLUE_SECTION_NAME);
1520
1521 BFD_ASSERT (s != NULL);
1522
1523 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
1524
1525 s->size = globals->arm_glue_size;
1526 s->contents = foo;
1527 }
1528
1529 if (globals->thumb_glue_size != 0)
1530 {
1531 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1532
1533 s = bfd_get_section_by_name
1534 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1535
1536 BFD_ASSERT (s != NULL);
1537
1538 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
1539
1540 s->size = globals->thumb_glue_size;
1541 s->contents = foo;
1542 }
1543
1544 return TRUE;
1545 }
1546
1547 static void
1548 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
1549 struct elf_link_hash_entry * h)
1550 {
1551 const char * name = h->root.root.string;
1552 asection * s;
1553 char * tmp_name;
1554 struct elf_link_hash_entry * myh;
1555 struct bfd_link_hash_entry * bh;
1556 struct elf32_arm_link_hash_table * globals;
1557 bfd_vma val;
1558
1559 globals = elf32_arm_hash_table (link_info);
1560
1561 BFD_ASSERT (globals != NULL);
1562 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1563
1564 s = bfd_get_section_by_name
1565 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1566
1567 BFD_ASSERT (s != NULL);
1568
1569 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1570
1571 BFD_ASSERT (tmp_name);
1572
1573 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1574
1575 myh = elf_link_hash_lookup
1576 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
1577
1578 if (myh != NULL)
1579 {
1580 /* We've already seen this guy. */
1581 free (tmp_name);
1582 return;
1583 }
1584
1585 /* The only trick here is using hash_table->arm_glue_size as the value.
1586 Even though the section isn't allocated yet, this is where we will be
1587 putting it. */
1588 bh = NULL;
1589 val = globals->arm_glue_size + 1;
1590 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
1591 tmp_name, BSF_GLOBAL, s, val,
1592 NULL, TRUE, FALSE, &bh);
1593
1594 myh = (struct elf_link_hash_entry *) bh;
1595 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
1596 myh->forced_local = 1;
1597
1598 free (tmp_name);
1599
1600 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
1601
1602 return;
1603 }
1604
1605 static void
1606 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
1607 struct elf_link_hash_entry *h)
1608 {
1609 const char *name = h->root.root.string;
1610 asection *s;
1611 char *tmp_name;
1612 struct elf_link_hash_entry *myh;
1613 struct bfd_link_hash_entry *bh;
1614 struct elf32_arm_link_hash_table *hash_table;
1615 bfd_vma val;
1616
1617 hash_table = elf32_arm_hash_table (link_info);
1618
1619 BFD_ASSERT (hash_table != NULL);
1620 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
1621
1622 s = bfd_get_section_by_name
1623 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1624
1625 BFD_ASSERT (s != NULL);
1626
1627 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1628 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1629
1630 BFD_ASSERT (tmp_name);
1631
1632 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1633
1634 myh = elf_link_hash_lookup
1635 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1636
1637 if (myh != NULL)
1638 {
1639 /* We've already seen this guy. */
1640 free (tmp_name);
1641 return;
1642 }
1643
1644 bh = NULL;
1645 val = hash_table->thumb_glue_size + 1;
1646 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1647 tmp_name, BSF_GLOBAL, s, val,
1648 NULL, TRUE, FALSE, &bh);
1649
1650 /* If we mark it 'Thumb', the disassembler will do a better job. */
1651 myh = (struct elf_link_hash_entry *) bh;
1652 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
1653 myh->forced_local = 1;
1654
1655 free (tmp_name);
1656
1657 #define CHANGE_TO_ARM "__%s_change_to_arm"
1658 #define BACK_FROM_ARM "__%s_back_from_arm"
1659
1660 /* Allocate another symbol to mark where we switch to Arm mode. */
1661 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1662 + strlen (CHANGE_TO_ARM) + 1);
1663
1664 BFD_ASSERT (tmp_name);
1665
1666 sprintf (tmp_name, CHANGE_TO_ARM, name);
1667
1668 bh = NULL;
1669 val = hash_table->thumb_glue_size + 4,
1670 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1671 tmp_name, BSF_LOCAL, s, val,
1672 NULL, TRUE, FALSE, &bh);
1673
1674 free (tmp_name);
1675
1676 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
1677
1678 return;
1679 }
1680
1681 /* Add the glue sections to ABFD. This function is called from the
1682 linker scripts in ld/emultempl/{armelf}.em. */
1683
1684 bfd_boolean
1685 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
1686 struct bfd_link_info *info)
1687 {
1688 flagword flags;
1689 asection *sec;
1690
1691 /* If we are only performing a partial
1692 link do not bother adding the glue. */
1693 if (info->relocatable)
1694 return TRUE;
1695
1696 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1697
1698 if (sec == NULL)
1699 {
1700 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1701 will prevent elf_link_input_bfd() from processing the contents
1702 of this section. */
1703 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
1704
1705 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1706
1707 if (sec == NULL
1708 || !bfd_set_section_flags (abfd, sec, flags)
1709 || !bfd_set_section_alignment (abfd, sec, 2))
1710 return FALSE;
1711
1712 /* Set the gc mark to prevent the section from being removed by garbage
1713 collection, despite the fact that no relocs refer to this section. */
1714 sec->gc_mark = 1;
1715 }
1716
1717 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1718
1719 if (sec == NULL)
1720 {
1721 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1722 | SEC_CODE | SEC_READONLY;
1723
1724 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1725
1726 if (sec == NULL
1727 || !bfd_set_section_flags (abfd, sec, flags)
1728 || !bfd_set_section_alignment (abfd, sec, 2))
1729 return FALSE;
1730
1731 sec->gc_mark = 1;
1732 }
1733
1734 return TRUE;
1735 }
1736
1737 /* Select a BFD to be used to hold the sections used by the glue code.
1738 This function is called from the linker scripts in ld/emultempl/
1739 {armelf/pe}.em */
1740
1741 bfd_boolean
1742 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
1743 {
1744 struct elf32_arm_link_hash_table *globals;
1745
1746 /* If we are only performing a partial link
1747 do not bother getting a bfd to hold the glue. */
1748 if (info->relocatable)
1749 return TRUE;
1750
1751 /* Make sure we don't attach the glue sections to a dynamic object. */
1752 BFD_ASSERT (!(abfd->flags & DYNAMIC));
1753
1754 globals = elf32_arm_hash_table (info);
1755
1756 BFD_ASSERT (globals != NULL);
1757
1758 if (globals->bfd_of_glue_owner != NULL)
1759 return TRUE;
1760
1761 /* Save the bfd for later use. */
1762 globals->bfd_of_glue_owner = abfd;
1763
1764 return TRUE;
1765 }
1766
1767 bfd_boolean
1768 bfd_elf32_arm_process_before_allocation (bfd *abfd,
1769 struct bfd_link_info *link_info,
1770 int byteswap_code)
1771 {
1772 Elf_Internal_Shdr *symtab_hdr;
1773 Elf_Internal_Rela *internal_relocs = NULL;
1774 Elf_Internal_Rela *irel, *irelend;
1775 bfd_byte *contents = NULL;
1776
1777 asection *sec;
1778 struct elf32_arm_link_hash_table *globals;
1779
1780 /* If we are only performing a partial link do not bother
1781 to construct any glue. */
1782 if (link_info->relocatable)
1783 return TRUE;
1784
1785 /* Here we have a bfd that is to be included on the link. We have a hook
1786 to do reloc rummaging, before section sizes are nailed down. */
1787 globals = elf32_arm_hash_table (link_info);
1788
1789 BFD_ASSERT (globals != NULL);
1790 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1791
1792 if (byteswap_code && !bfd_big_endian (abfd))
1793 {
1794 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1795 abfd);
1796 return FALSE;
1797 }
1798 globals->byteswap_code = byteswap_code;
1799
1800 /* Rummage around all the relocs and map the glue vectors. */
1801 sec = abfd->sections;
1802
1803 if (sec == NULL)
1804 return TRUE;
1805
1806 for (; sec != NULL; sec = sec->next)
1807 {
1808 if (sec->reloc_count == 0)
1809 continue;
1810
1811 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1812
1813 /* Load the relocs. */
1814 internal_relocs
1815 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
1816 (Elf_Internal_Rela *) NULL, FALSE);
1817
1818 if (internal_relocs == NULL)
1819 goto error_return;
1820
1821 irelend = internal_relocs + sec->reloc_count;
1822 for (irel = internal_relocs; irel < irelend; irel++)
1823 {
1824 long r_type;
1825 unsigned long r_index;
1826
1827 struct elf_link_hash_entry *h;
1828
1829 r_type = ELF32_R_TYPE (irel->r_info);
1830 r_index = ELF32_R_SYM (irel->r_info);
1831
1832 /* These are the only relocation types we care about. */
1833 if ( r_type != R_ARM_PC24
1834 && r_type != R_ARM_PLT32
1835 #ifndef OLD_ARM_ABI
1836 && r_type != R_ARM_CALL
1837 && r_type != R_ARM_JUMP24
1838 #endif
1839 && r_type != R_ARM_THM_PC22)
1840 continue;
1841
1842 /* Get the section contents if we haven't done so already. */
1843 if (contents == NULL)
1844 {
1845 /* Get cached copy if it exists. */
1846 if (elf_section_data (sec)->this_hdr.contents != NULL)
1847 contents = elf_section_data (sec)->this_hdr.contents;
1848 else
1849 {
1850 /* Go get them off disk. */
1851 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
1852 goto error_return;
1853 }
1854 }
1855
1856 /* If the relocation is not against a symbol it cannot concern us. */
1857 h = NULL;
1858
1859 /* We don't care about local symbols. */
1860 if (r_index < symtab_hdr->sh_info)
1861 continue;
1862
1863 /* This is an external symbol. */
1864 r_index -= symtab_hdr->sh_info;
1865 h = (struct elf_link_hash_entry *)
1866 elf_sym_hashes (abfd)[r_index];
1867
1868 /* If the relocation is against a static symbol it must be within
1869 the current section and so cannot be a cross ARM/Thumb relocation. */
1870 if (h == NULL)
1871 continue;
1872
1873 /* If the call will go through a PLT entry then we do not need
1874 glue. */
1875 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
1876 continue;
1877
1878 switch (r_type)
1879 {
1880 case R_ARM_PC24:
1881 #ifndef OLD_ARM_ABI
1882 case R_ARM_CALL:
1883 case R_ARM_JUMP24:
1884 #endif
1885 /* This one is a call from arm code. We need to look up
1886 the target of the call. If it is a thumb target, we
1887 insert glue. */
1888 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
1889 record_arm_to_thumb_glue (link_info, h);
1890 break;
1891
1892 case R_ARM_THM_PC22:
1893 /* This one is a call from thumb code. We look
1894 up the target of the call. If it is not a thumb
1895 target, we insert glue. */
1896 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
1897 record_thumb_to_arm_glue (link_info, h);
1898 break;
1899
1900 default:
1901 break;
1902 }
1903 }
1904
1905 if (contents != NULL
1906 && elf_section_data (sec)->this_hdr.contents != contents)
1907 free (contents);
1908 contents = NULL;
1909
1910 if (internal_relocs != NULL
1911 && elf_section_data (sec)->relocs != internal_relocs)
1912 free (internal_relocs);
1913 internal_relocs = NULL;
1914 }
1915
1916 return TRUE;
1917
1918 error_return:
1919 if (contents != NULL
1920 && elf_section_data (sec)->this_hdr.contents != contents)
1921 free (contents);
1922 if (internal_relocs != NULL
1923 && elf_section_data (sec)->relocs != internal_relocs)
1924 free (internal_relocs);
1925
1926 return FALSE;
1927 }
1928 #endif
1929
1930
1931 #ifndef OLD_ARM_ABI
1932 /* Set target relocation values needed during linking. */
1933
1934 void
1935 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
1936 int target1_is_rel,
1937 char * target2_type,
1938 int fix_v4bx)
1939 {
1940 struct elf32_arm_link_hash_table *globals;
1941
1942 globals = elf32_arm_hash_table (link_info);
1943
1944 globals->target1_is_rel = target1_is_rel;
1945 if (strcmp (target2_type, "rel") == 0)
1946 globals->target2_reloc = R_ARM_REL32;
1947 else if (strcmp (target2_type, "abs") == 0)
1948 globals->target2_reloc = R_ARM_ABS32;
1949 else if (strcmp (target2_type, "got-rel") == 0)
1950 globals->target2_reloc = R_ARM_GOT_PREL;
1951 else
1952 {
1953 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
1954 target2_type);
1955 }
1956 globals->fix_v4bx = fix_v4bx;
1957 }
1958 #endif
1959
1960 /* The thumb form of a long branch is a bit finicky, because the offset
1961 encoding is split over two fields, each in it's own instruction. They
1962 can occur in any order. So given a thumb form of long branch, and an
1963 offset, insert the offset into the thumb branch and return finished
1964 instruction.
1965
1966 It takes two thumb instructions to encode the target address. Each has
1967 11 bits to invest. The upper 11 bits are stored in one (identified by
1968 H-0.. see below), the lower 11 bits are stored in the other (identified
1969 by H-1).
1970
1971 Combine together and shifted left by 1 (it's a half word address) and
1972 there you have it.
1973
1974 Op: 1111 = F,
1975 H-0, upper address-0 = 000
1976 Op: 1111 = F,
1977 H-1, lower address-0 = 800
1978
1979 They can be ordered either way, but the arm tools I've seen always put
1980 the lower one first. It probably doesn't matter. krk@cygnus.com
1981
1982 XXX: Actually the order does matter. The second instruction (H-1)
1983 moves the computed address into the PC, so it must be the second one
1984 in the sequence. The problem, however is that whilst little endian code
1985 stores the instructions in HI then LOW order, big endian code does the
1986 reverse. nickc@cygnus.com. */
1987
1988 #define LOW_HI_ORDER 0xF800F000
1989 #define HI_LOW_ORDER 0xF000F800
1990
1991 static insn32
1992 insert_thumb_branch (insn32 br_insn, int rel_off)
1993 {
1994 unsigned int low_bits;
1995 unsigned int high_bits;
1996
1997 BFD_ASSERT ((rel_off & 1) != 1);
1998
1999 rel_off >>= 1; /* Half word aligned address. */
2000 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2001 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
2002
2003 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2004 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2005 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2006 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2007 else
2008 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2009 abort (); /* Error - not a valid branch instruction form. */
2010
2011 return br_insn;
2012 }
2013
2014 /* Thumb code calling an ARM function. */
2015
2016 static int
2017 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2018 const char * name,
2019 bfd * input_bfd,
2020 bfd * output_bfd,
2021 asection * input_section,
2022 bfd_byte * hit_data,
2023 asection * sym_sec,
2024 bfd_vma offset,
2025 bfd_signed_vma addend,
2026 bfd_vma val)
2027 {
2028 asection * s = 0;
2029 bfd_vma my_offset;
2030 unsigned long int tmp;
2031 long int ret_offset;
2032 struct elf_link_hash_entry * myh;
2033 struct elf32_arm_link_hash_table * globals;
2034
2035 myh = find_thumb_glue (info, name, input_bfd);
2036 if (myh == NULL)
2037 return FALSE;
2038
2039 globals = elf32_arm_hash_table (info);
2040
2041 BFD_ASSERT (globals != NULL);
2042 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2043
2044 my_offset = myh->root.u.def.value;
2045
2046 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2047 THUMB2ARM_GLUE_SECTION_NAME);
2048
2049 BFD_ASSERT (s != NULL);
2050 BFD_ASSERT (s->contents != NULL);
2051 BFD_ASSERT (s->output_section != NULL);
2052
2053 if ((my_offset & 0x01) == 0x01)
2054 {
2055 if (sym_sec != NULL
2056 && sym_sec->owner != NULL
2057 && !INTERWORK_FLAG (sym_sec->owner))
2058 {
2059 (*_bfd_error_handler)
2060 (_("%B(%s): warning: interworking not enabled.\n"
2061 " first occurrence: %B: thumb call to arm"),
2062 sym_sec->owner, input_bfd, name);
2063
2064 return FALSE;
2065 }
2066
2067 --my_offset;
2068 myh->root.u.def.value = my_offset;
2069
2070 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2071 s->contents + my_offset);
2072
2073 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2074 s->contents + my_offset + 2);
2075
2076 ret_offset =
2077 /* Address of destination of the stub. */
2078 ((bfd_signed_vma) val)
2079 - ((bfd_signed_vma)
2080 /* Offset from the start of the current section
2081 to the start of the stubs. */
2082 (s->output_offset
2083 /* Offset of the start of this stub from the start of the stubs. */
2084 + my_offset
2085 /* Address of the start of the current section. */
2086 + s->output_section->vma)
2087 /* The branch instruction is 4 bytes into the stub. */
2088 + 4
2089 /* ARM branches work from the pc of the instruction + 8. */
2090 + 8);
2091
2092 bfd_put_32 (output_bfd,
2093 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2094 s->contents + my_offset + 4);
2095 }
2096
2097 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2098
2099 /* Now go back and fix up the original BL insn to point to here. */
2100 ret_offset =
2101 /* Address of where the stub is located. */
2102 (s->output_section->vma + s->output_offset + my_offset)
2103 /* Address of where the BL is located. */
2104 - (input_section->output_section->vma + input_section->output_offset
2105 + offset)
2106 /* Addend in the relocation. */
2107 - addend
2108 /* Biassing for PC-relative addressing. */
2109 - 8;
2110
2111 tmp = bfd_get_32 (input_bfd, hit_data
2112 - input_section->vma);
2113
2114 bfd_put_32 (output_bfd,
2115 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2116 hit_data - input_section->vma);
2117
2118 return TRUE;
2119 }
2120
2121 /* Arm code calling a Thumb function. */
2122
2123 static int
2124 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2125 const char * name,
2126 bfd * input_bfd,
2127 bfd * output_bfd,
2128 asection * input_section,
2129 bfd_byte * hit_data,
2130 asection * sym_sec,
2131 bfd_vma offset,
2132 bfd_signed_vma addend,
2133 bfd_vma val)
2134 {
2135 unsigned long int tmp;
2136 bfd_vma my_offset;
2137 asection * s;
2138 long int ret_offset;
2139 struct elf_link_hash_entry * myh;
2140 struct elf32_arm_link_hash_table * globals;
2141
2142 myh = find_arm_glue (info, name, input_bfd);
2143 if (myh == NULL)
2144 return FALSE;
2145
2146 globals = elf32_arm_hash_table (info);
2147
2148 BFD_ASSERT (globals != NULL);
2149 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2150
2151 my_offset = myh->root.u.def.value;
2152 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2153 ARM2THUMB_GLUE_SECTION_NAME);
2154 BFD_ASSERT (s != NULL);
2155 BFD_ASSERT (s->contents != NULL);
2156 BFD_ASSERT (s->output_section != NULL);
2157
2158 if ((my_offset & 0x01) == 0x01)
2159 {
2160 if (sym_sec != NULL
2161 && sym_sec->owner != NULL
2162 && !INTERWORK_FLAG (sym_sec->owner))
2163 {
2164 (*_bfd_error_handler)
2165 (_("%B(%s): warning: interworking not enabled.\n"
2166 " first occurrence: %B: arm call to thumb"),
2167 sym_sec->owner, input_bfd, name);
2168 }
2169
2170 --my_offset;
2171 myh->root.u.def.value = my_offset;
2172
2173 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2174 s->contents + my_offset);
2175
2176 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2177 s->contents + my_offset + 4);
2178
2179 /* It's a thumb address. Add the low order bit. */
2180 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2181 s->contents + my_offset + 8);
2182 }
2183
2184 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2185
2186 tmp = bfd_get_32 (input_bfd, hit_data);
2187 tmp = tmp & 0xFF000000;
2188
2189 /* Somehow these are both 4 too far, so subtract 8. */
2190 ret_offset = (s->output_offset
2191 + my_offset
2192 + s->output_section->vma
2193 - (input_section->output_offset
2194 + input_section->output_section->vma
2195 + offset + addend)
2196 - 8);
2197
2198 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2199
2200 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2201
2202 return TRUE;
2203 }
2204
2205
2206 #ifndef OLD_ARM_ABI
2207 /* Some relocations map to different relocations depending on the
2208 target. Return the real relocation. */
2209 static int
2210 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2211 int r_type)
2212 {
2213 switch (r_type)
2214 {
2215 case R_ARM_TARGET1:
2216 if (globals->target1_is_rel)
2217 return R_ARM_REL32;
2218 else
2219 return R_ARM_ABS32;
2220
2221 case R_ARM_TARGET2:
2222 return globals->target2_reloc;
2223
2224 default:
2225 return r_type;
2226 }
2227 }
2228 #endif /* OLD_ARM_ABI */
2229
2230
2231 /* Perform a relocation as part of a final link. */
2232
2233 static bfd_reloc_status_type
2234 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2235 bfd * input_bfd,
2236 bfd * output_bfd,
2237 asection * input_section,
2238 bfd_byte * contents,
2239 Elf_Internal_Rela * rel,
2240 bfd_vma value,
2241 struct bfd_link_info * info,
2242 asection * sym_sec,
2243 const char * sym_name,
2244 int sym_flags,
2245 struct elf_link_hash_entry * h)
2246 {
2247 unsigned long r_type = howto->type;
2248 unsigned long r_symndx;
2249 bfd_byte * hit_data = contents + rel->r_offset;
2250 bfd * dynobj = NULL;
2251 Elf_Internal_Shdr * symtab_hdr;
2252 struct elf_link_hash_entry ** sym_hashes;
2253 bfd_vma * local_got_offsets;
2254 asection * sgot = NULL;
2255 asection * splt = NULL;
2256 asection * sreloc = NULL;
2257 bfd_vma addend;
2258 bfd_signed_vma signed_addend;
2259 struct elf32_arm_link_hash_table * globals;
2260
2261 globals = elf32_arm_hash_table (info);
2262
2263 #ifndef OLD_ARM_ABI
2264 /* Some relocation type map to different relocations depending on the
2265 target. We pick the right one here. */
2266 r_type = arm_real_reloc_type (globals, r_type);
2267 if (r_type != howto->type)
2268 howto = elf32_arm_howto_from_type (r_type);
2269 #endif /* OLD_ARM_ABI */
2270
2271 /* If the start address has been set, then set the EF_ARM_HASENTRY
2272 flag. Setting this more than once is redundant, but the cost is
2273 not too high, and it keeps the code simple.
2274
2275 The test is done here, rather than somewhere else, because the
2276 start address is only set just before the final link commences.
2277
2278 Note - if the user deliberately sets a start address of 0, the
2279 flag will not be set. */
2280 if (bfd_get_start_address (output_bfd) != 0)
2281 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2282
2283 dynobj = elf_hash_table (info)->dynobj;
2284 if (dynobj)
2285 {
2286 sgot = bfd_get_section_by_name (dynobj, ".got");
2287 splt = bfd_get_section_by_name (dynobj, ".plt");
2288 }
2289 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2290 sym_hashes = elf_sym_hashes (input_bfd);
2291 local_got_offsets = elf_local_got_offsets (input_bfd);
2292 r_symndx = ELF32_R_SYM (rel->r_info);
2293
2294 if (globals->use_rel)
2295 {
2296 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2297
2298 if (addend & ((howto->src_mask + 1) >> 1))
2299 {
2300 signed_addend = -1;
2301 signed_addend &= ~ howto->src_mask;
2302 signed_addend |= addend;
2303 }
2304 else
2305 signed_addend = addend;
2306 }
2307 else
2308 addend = signed_addend = rel->r_addend;
2309
2310 switch (r_type)
2311 {
2312 case R_ARM_NONE:
2313 return bfd_reloc_ok;
2314
2315 case R_ARM_PC24:
2316 case R_ARM_ABS32:
2317 case R_ARM_REL32:
2318 #ifndef OLD_ARM_ABI
2319 case R_ARM_CALL:
2320 case R_ARM_JUMP24:
2321 case R_ARM_XPC25:
2322 case R_ARM_PREL31:
2323 #endif
2324 case R_ARM_PLT32:
2325 /* r_symndx will be zero only for relocs against symbols
2326 from removed linkonce sections, or sections discarded by
2327 a linker script. */
2328 if (r_symndx == 0)
2329 return bfd_reloc_ok;
2330
2331 /* Handle relocations which should use the PLT entry. ABS32/REL32
2332 will use the symbol's value, which may point to a PLT entry, but we
2333 don't need to handle that here. If we created a PLT entry, all
2334 branches in this object should go to it. */
2335 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2336 && h != NULL
2337 && splt != NULL
2338 && h->plt.offset != (bfd_vma) -1)
2339 {
2340 /* If we've created a .plt section, and assigned a PLT entry to
2341 this function, it should not be known to bind locally. If
2342 it were, we would have cleared the PLT entry. */
2343 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2344
2345 value = (splt->output_section->vma
2346 + splt->output_offset
2347 + h->plt.offset);
2348 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2349 contents, rel->r_offset, value,
2350 (bfd_vma) 0);
2351 }
2352
2353 /* When generating a shared object, these relocations are copied
2354 into the output file to be resolved at run time. */
2355 if (info->shared
2356 && (input_section->flags & SEC_ALLOC)
2357 && (r_type != R_ARM_REL32
2358 || !SYMBOL_CALLS_LOCAL (info, h))
2359 && (h == NULL
2360 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2361 || h->root.type != bfd_link_hash_undefweak)
2362 && r_type != R_ARM_PC24
2363 #ifndef OLD_ARM_ABI
2364 && r_type != R_ARM_CALL
2365 && r_type != R_ARM_JUMP24
2366 && r_type != R_ARM_PREL31
2367 #endif
2368 && r_type != R_ARM_PLT32)
2369 {
2370 Elf_Internal_Rela outrel;
2371 bfd_byte *loc;
2372 bfd_boolean skip, relocate;
2373
2374 if (sreloc == NULL)
2375 {
2376 const char * name;
2377
2378 name = (bfd_elf_string_from_elf_section
2379 (input_bfd,
2380 elf_elfheader (input_bfd)->e_shstrndx,
2381 elf_section_data (input_section)->rel_hdr.sh_name));
2382 if (name == NULL)
2383 return bfd_reloc_notsupported;
2384
2385 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2386 && strcmp (bfd_get_section_name (input_bfd,
2387 input_section),
2388 name + 4) == 0);
2389
2390 sreloc = bfd_get_section_by_name (dynobj, name);
2391 BFD_ASSERT (sreloc != NULL);
2392 }
2393
2394 skip = FALSE;
2395 relocate = FALSE;
2396
2397 outrel.r_offset =
2398 _bfd_elf_section_offset (output_bfd, info, input_section,
2399 rel->r_offset);
2400 if (outrel.r_offset == (bfd_vma) -1)
2401 skip = TRUE;
2402 else if (outrel.r_offset == (bfd_vma) -2)
2403 skip = TRUE, relocate = TRUE;
2404 outrel.r_offset += (input_section->output_section->vma
2405 + input_section->output_offset);
2406
2407 if (skip)
2408 memset (&outrel, 0, sizeof outrel);
2409 else if (h != NULL
2410 && h->dynindx != -1
2411 && (!info->shared
2412 || !info->symbolic
2413 || !h->def_regular))
2414 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2415 else
2416 {
2417 int symbol;
2418
2419 /* This symbol is local, or marked to become local. */
2420 relocate = TRUE;
2421 if (sym_flags == STT_ARM_TFUNC)
2422 value |= 1;
2423 if (globals->symbian_p)
2424 {
2425 /* On Symbian OS, the data segment and text segement
2426 can be relocated independently. Therefore, we
2427 must indicate the segment to which this
2428 relocation is relative. The BPABI allows us to
2429 use any symbol in the right segment; we just use
2430 the section symbol as it is convenient. (We
2431 cannot use the symbol given by "h" directly as it
2432 will not appear in the dynamic symbol table.) */
2433 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2434 BFD_ASSERT (symbol != 0);
2435 }
2436 else
2437 /* On SVR4-ish systems, the dynamic loader cannot
2438 relocate the text and data segments independently,
2439 so the symbol does not matter. */
2440 symbol = 0;
2441 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
2442 }
2443
2444 loc = sreloc->contents;
2445 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2446 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2447
2448 /* If this reloc is against an external symbol, we do not want to
2449 fiddle with the addend. Otherwise, we need to include the symbol
2450 value so that it becomes an addend for the dynamic reloc. */
2451 if (! relocate)
2452 return bfd_reloc_ok;
2453
2454 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2455 contents, rel->r_offset, value,
2456 (bfd_vma) 0);
2457 }
2458 else switch (r_type)
2459 {
2460 #ifndef OLD_ARM_ABI
2461 case R_ARM_XPC25: /* Arm BLX instruction. */
2462 case R_ARM_CALL:
2463 case R_ARM_JUMP24:
2464 #endif
2465 case R_ARM_PC24: /* Arm B/BL instruction */
2466 case R_ARM_PLT32:
2467 #ifndef OLD_ARM_ABI
2468 if (r_type == R_ARM_XPC25)
2469 {
2470 /* Check for Arm calling Arm function. */
2471 /* FIXME: Should we translate the instruction into a BL
2472 instruction instead ? */
2473 if (sym_flags != STT_ARM_TFUNC)
2474 (*_bfd_error_handler)
2475 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2476 input_bfd,
2477 h ? h->root.root.string : "(local)");
2478 }
2479 else
2480 #endif
2481 {
2482 /* Check for Arm calling Thumb function. */
2483 if (sym_flags == STT_ARM_TFUNC)
2484 {
2485 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2486 output_bfd, input_section,
2487 hit_data, sym_sec, rel->r_offset,
2488 signed_addend, value);
2489 return bfd_reloc_ok;
2490 }
2491 }
2492
2493 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2494 where:
2495 S is the address of the symbol in the relocation.
2496 P is address of the instruction being relocated.
2497 A is the addend (extracted from the instruction) in bytes.
2498
2499 S is held in 'value'.
2500 P is the base address of the section containing the
2501 instruction plus the offset of the reloc into that
2502 section, ie:
2503 (input_section->output_section->vma +
2504 input_section->output_offset +
2505 rel->r_offset).
2506 A is the addend, converted into bytes, ie:
2507 (signed_addend * 4)
2508
2509 Note: None of these operations have knowledge of the pipeline
2510 size of the processor, thus it is up to the assembler to
2511 encode this information into the addend. */
2512 value -= (input_section->output_section->vma
2513 + input_section->output_offset);
2514 value -= rel->r_offset;
2515 if (globals->use_rel)
2516 value += (signed_addend << howto->size);
2517 else
2518 /* RELA addends do not have to be adjusted by howto->size. */
2519 value += signed_addend;
2520
2521 signed_addend = value;
2522 signed_addend >>= howto->rightshift;
2523
2524 /* It is not an error for an undefined weak reference to be
2525 out of range. Any program that branches to such a symbol
2526 is going to crash anyway, so there is no point worrying
2527 about getting the destination exactly right. */
2528 if (! h || h->root.type != bfd_link_hash_undefweak)
2529 {
2530 /* Perform a signed range check. */
2531 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
2532 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2533 return bfd_reloc_overflow;
2534 }
2535
2536 #ifndef OLD_ARM_ABI
2537 /* If necessary set the H bit in the BLX instruction. */
2538 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2539 value = (signed_addend & howto->dst_mask)
2540 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2541 | (1 << 24);
2542 else
2543 #endif
2544 value = (signed_addend & howto->dst_mask)
2545 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
2546 break;
2547
2548 case R_ARM_ABS32:
2549 value += addend;
2550 if (sym_flags == STT_ARM_TFUNC)
2551 value |= 1;
2552 break;
2553
2554 case R_ARM_REL32:
2555 value -= (input_section->output_section->vma
2556 + input_section->output_offset + rel->r_offset);
2557 value += addend;
2558 break;
2559
2560 #ifndef OLD_ARM_ABI
2561 case R_ARM_PREL31:
2562 value -= (input_section->output_section->vma
2563 + input_section->output_offset + rel->r_offset);
2564 value += signed_addend;
2565 if (! h || h->root.type != bfd_link_hash_undefweak)
2566 {
2567 /* Check for overflow */
2568 if ((value ^ (value >> 1)) & (1 << 30))
2569 return bfd_reloc_overflow;
2570 }
2571 value &= 0x7fffffff;
2572 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2573 if (sym_flags == STT_ARM_TFUNC)
2574 value |= 1;
2575 break;
2576 #endif
2577 }
2578
2579 bfd_put_32 (input_bfd, value, hit_data);
2580 return bfd_reloc_ok;
2581
2582 case R_ARM_ABS8:
2583 value += addend;
2584 if ((long) value > 0x7f || (long) value < -0x80)
2585 return bfd_reloc_overflow;
2586
2587 bfd_put_8 (input_bfd, value, hit_data);
2588 return bfd_reloc_ok;
2589
2590 case R_ARM_ABS16:
2591 value += addend;
2592
2593 if ((long) value > 0x7fff || (long) value < -0x8000)
2594 return bfd_reloc_overflow;
2595
2596 bfd_put_16 (input_bfd, value, hit_data);
2597 return bfd_reloc_ok;
2598
2599 case R_ARM_ABS12:
2600 /* Support ldr and str instruction for the arm */
2601 /* Also thumb b (unconditional branch). ??? Really? */
2602 value += addend;
2603
2604 if ((long) value > 0x7ff || (long) value < -0x800)
2605 return bfd_reloc_overflow;
2606
2607 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2608 bfd_put_32 (input_bfd, value, hit_data);
2609 return bfd_reloc_ok;
2610
2611 case R_ARM_THM_ABS5:
2612 /* Support ldr and str instructions for the thumb. */
2613 if (globals->use_rel)
2614 {
2615 /* Need to refetch addend. */
2616 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2617 /* ??? Need to determine shift amount from operand size. */
2618 addend >>= howto->rightshift;
2619 }
2620 value += addend;
2621
2622 /* ??? Isn't value unsigned? */
2623 if ((long) value > 0x1f || (long) value < -0x10)
2624 return bfd_reloc_overflow;
2625
2626 /* ??? Value needs to be properly shifted into place first. */
2627 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2628 bfd_put_16 (input_bfd, value, hit_data);
2629 return bfd_reloc_ok;
2630
2631 #ifndef OLD_ARM_ABI
2632 case R_ARM_THM_XPC22:
2633 #endif
2634 case R_ARM_THM_PC22:
2635 /* Thumb BL (branch long instruction). */
2636 {
2637 bfd_vma relocation;
2638 bfd_boolean overflow = FALSE;
2639 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2640 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
2641 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
2642 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2643 bfd_vma check;
2644 bfd_signed_vma signed_check;
2645
2646 /* Need to refetch the addend and squish the two 11 bit pieces
2647 together. */
2648 if (globals->use_rel)
2649 {
2650 bfd_vma upper = upper_insn & 0x7ff;
2651 bfd_vma lower = lower_insn & 0x7ff;
2652 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2653 addend = (upper << 12) | (lower << 1);
2654 signed_addend = addend;
2655 }
2656 #ifndef OLD_ARM_ABI
2657 if (r_type == R_ARM_THM_XPC22)
2658 {
2659 /* Check for Thumb to Thumb call. */
2660 /* FIXME: Should we translate the instruction into a BL
2661 instruction instead ? */
2662 if (sym_flags == STT_ARM_TFUNC)
2663 (*_bfd_error_handler)
2664 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2665 input_bfd,
2666 h ? h->root.root.string : "(local)");
2667 }
2668 else
2669 #endif
2670 {
2671 /* If it is not a call to Thumb, assume call to Arm.
2672 If it is a call relative to a section name, then it is not a
2673 function call at all, but rather a long jump. Calls through
2674 the PLT do not require stubs. */
2675 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
2676 && (h == NULL || splt == NULL
2677 || h->plt.offset == (bfd_vma) -1))
2678 {
2679 if (elf32_thumb_to_arm_stub
2680 (info, sym_name, input_bfd, output_bfd, input_section,
2681 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2682 return bfd_reloc_ok;
2683 else
2684 return bfd_reloc_dangerous;
2685 }
2686 }
2687
2688 /* Handle calls via the PLT. */
2689 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
2690 {
2691 value = (splt->output_section->vma
2692 + splt->output_offset
2693 + h->plt.offset);
2694 /* Target the Thumb stub before the ARM PLT entry. */
2695 value -= 4;
2696 }
2697
2698 relocation = value + signed_addend;
2699
2700 relocation -= (input_section->output_section->vma
2701 + input_section->output_offset
2702 + rel->r_offset);
2703
2704 check = relocation >> howto->rightshift;
2705
2706 /* If this is a signed value, the rightshift just dropped
2707 leading 1 bits (assuming twos complement). */
2708 if ((bfd_signed_vma) relocation >= 0)
2709 signed_check = check;
2710 else
2711 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2712
2713 /* Assumes two's complement. */
2714 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2715 overflow = TRUE;
2716
2717 #ifndef OLD_ARM_ABI
2718 if (r_type == R_ARM_THM_XPC22
2719 && ((lower_insn & 0x1800) == 0x0800))
2720 /* For a BLX instruction, make sure that the relocation is rounded up
2721 to a word boundary. This follows the semantics of the instruction
2722 which specifies that bit 1 of the target address will come from bit
2723 1 of the base address. */
2724 relocation = (relocation + 2) & ~ 3;
2725 #endif
2726 /* Put RELOCATION back into the insn. */
2727 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
2728 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
2729
2730 /* Put the relocated value back in the object file: */
2731 bfd_put_16 (input_bfd, upper_insn, hit_data);
2732 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
2733
2734 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
2735 }
2736 break;
2737
2738 case R_ARM_THM_PC11:
2739 /* Thumb B (branch) instruction). */
2740 {
2741 bfd_signed_vma relocation;
2742 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
2743 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2744 bfd_signed_vma signed_check;
2745
2746 if (globals->use_rel)
2747 {
2748 /* Need to refetch addend. */
2749 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2750 if (addend & ((howto->src_mask + 1) >> 1))
2751 {
2752 signed_addend = -1;
2753 signed_addend &= ~ howto->src_mask;
2754 signed_addend |= addend;
2755 }
2756 else
2757 signed_addend = addend;
2758 /* The value in the insn has been right shifted. We need to
2759 undo this, so that we can perform the address calculation
2760 in terms of bytes. */
2761 signed_addend <<= howto->rightshift;
2762 }
2763 relocation = value + signed_addend;
2764
2765 relocation -= (input_section->output_section->vma
2766 + input_section->output_offset
2767 + rel->r_offset);
2768
2769 relocation >>= howto->rightshift;
2770 signed_check = relocation;
2771 relocation &= howto->dst_mask;
2772 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
2773
2774 bfd_put_16 (input_bfd, relocation, hit_data);
2775
2776 /* Assumes two's complement. */
2777 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2778 return bfd_reloc_overflow;
2779
2780 return bfd_reloc_ok;
2781 }
2782
2783 #ifndef OLD_ARM_ABI
2784 case R_ARM_ALU_PCREL7_0:
2785 case R_ARM_ALU_PCREL15_8:
2786 case R_ARM_ALU_PCREL23_15:
2787 {
2788 bfd_vma insn;
2789 bfd_vma relocation;
2790
2791 insn = bfd_get_32 (input_bfd, hit_data);
2792 if (globals->use_rel)
2793 {
2794 /* Extract the addend. */
2795 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
2796 signed_addend = addend;
2797 }
2798 relocation = value + signed_addend;
2799
2800 relocation -= (input_section->output_section->vma
2801 + input_section->output_offset
2802 + rel->r_offset);
2803 insn = (insn & ~0xfff)
2804 | ((howto->bitpos << 7) & 0xf00)
2805 | ((relocation >> howto->bitpos) & 0xff);
2806 bfd_put_32 (input_bfd, value, hit_data);
2807 }
2808 return bfd_reloc_ok;
2809 #endif
2810
2811 case R_ARM_GNU_VTINHERIT:
2812 case R_ARM_GNU_VTENTRY:
2813 return bfd_reloc_ok;
2814
2815 case R_ARM_COPY:
2816 return bfd_reloc_notsupported;
2817
2818 case R_ARM_GLOB_DAT:
2819 return bfd_reloc_notsupported;
2820
2821 case R_ARM_JUMP_SLOT:
2822 return bfd_reloc_notsupported;
2823
2824 case R_ARM_RELATIVE:
2825 return bfd_reloc_notsupported;
2826
2827 case R_ARM_GOTOFF:
2828 /* Relocation is relative to the start of the
2829 global offset table. */
2830
2831 BFD_ASSERT (sgot != NULL);
2832 if (sgot == NULL)
2833 return bfd_reloc_notsupported;
2834
2835 /* If we are addressing a Thumb function, we need to adjust the
2836 address by one, so that attempts to call the function pointer will
2837 correctly interpret it as Thumb code. */
2838 if (sym_flags == STT_ARM_TFUNC)
2839 value += 1;
2840
2841 /* Note that sgot->output_offset is not involved in this
2842 calculation. We always want the start of .got. If we
2843 define _GLOBAL_OFFSET_TABLE in a different way, as is
2844 permitted by the ABI, we might have to change this
2845 calculation. */
2846 value -= sgot->output_section->vma;
2847 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2848 contents, rel->r_offset, value,
2849 (bfd_vma) 0);
2850
2851 case R_ARM_GOTPC:
2852 /* Use global offset table as symbol value. */
2853 BFD_ASSERT (sgot != NULL);
2854
2855 if (sgot == NULL)
2856 return bfd_reloc_notsupported;
2857
2858 value = sgot->output_section->vma;
2859 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2860 contents, rel->r_offset, value,
2861 (bfd_vma) 0);
2862
2863 case R_ARM_GOT32:
2864 #ifndef OLD_ARM_ABI
2865 case R_ARM_GOT_PREL:
2866 #endif
2867 /* Relocation is to the entry for this symbol in the
2868 global offset table. */
2869 if (sgot == NULL)
2870 return bfd_reloc_notsupported;
2871
2872 if (h != NULL)
2873 {
2874 bfd_vma off;
2875 bfd_boolean dyn;
2876
2877 off = h->got.offset;
2878 BFD_ASSERT (off != (bfd_vma) -1);
2879 dyn = globals->root.dynamic_sections_created;
2880
2881 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2882 || (info->shared
2883 && SYMBOL_REFERENCES_LOCAL (info, h))
2884 || (ELF_ST_VISIBILITY (h->other)
2885 && h->root.type == bfd_link_hash_undefweak))
2886 {
2887 /* This is actually a static link, or it is a -Bsymbolic link
2888 and the symbol is defined locally. We must initialize this
2889 entry in the global offset table. Since the offset must
2890 always be a multiple of 4, we use the least significant bit
2891 to record whether we have initialized it already.
2892
2893 When doing a dynamic link, we create a .rel.got relocation
2894 entry to initialize the value. This is done in the
2895 finish_dynamic_symbol routine. */
2896 if ((off & 1) != 0)
2897 off &= ~1;
2898 else
2899 {
2900 /* If we are addressing a Thumb function, we need to
2901 adjust the address by one, so that attempts to
2902 call the function pointer will correctly
2903 interpret it as Thumb code. */
2904 if (sym_flags == STT_ARM_TFUNC)
2905 value |= 1;
2906
2907 bfd_put_32 (output_bfd, value, sgot->contents + off);
2908 h->got.offset |= 1;
2909 }
2910 }
2911
2912 value = sgot->output_offset + off;
2913 }
2914 else
2915 {
2916 bfd_vma off;
2917
2918 BFD_ASSERT (local_got_offsets != NULL &&
2919 local_got_offsets[r_symndx] != (bfd_vma) -1);
2920
2921 off = local_got_offsets[r_symndx];
2922
2923 /* The offset must always be a multiple of 4. We use the
2924 least significant bit to record whether we have already
2925 generated the necessary reloc. */
2926 if ((off & 1) != 0)
2927 off &= ~1;
2928 else
2929 {
2930 /* If we are addressing a Thumb function, we need to
2931 adjust the address by one, so that attempts to
2932 call the function pointer will correctly
2933 interpret it as Thumb code. */
2934 if (sym_flags == STT_ARM_TFUNC)
2935 value |= 1;
2936
2937 bfd_put_32 (output_bfd, value, sgot->contents + off);
2938
2939 if (info->shared)
2940 {
2941 asection * srelgot;
2942 Elf_Internal_Rela outrel;
2943 bfd_byte *loc;
2944
2945 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
2946 BFD_ASSERT (srelgot != NULL);
2947
2948 outrel.r_offset = (sgot->output_section->vma
2949 + sgot->output_offset
2950 + off);
2951 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
2952 loc = srelgot->contents;
2953 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2954 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2955 }
2956
2957 local_got_offsets[r_symndx] |= 1;
2958 }
2959
2960 value = sgot->output_offset + off;
2961 }
2962 if (r_type != R_ARM_GOT32)
2963 value += sgot->output_section->vma;
2964
2965 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2966 contents, rel->r_offset, value,
2967 (bfd_vma) 0);
2968
2969 case R_ARM_SBREL32:
2970 return bfd_reloc_notsupported;
2971
2972 case R_ARM_AMP_VCALL9:
2973 return bfd_reloc_notsupported;
2974
2975 case R_ARM_RSBREL32:
2976 return bfd_reloc_notsupported;
2977
2978 case R_ARM_THM_RPC22:
2979 return bfd_reloc_notsupported;
2980
2981 case R_ARM_RREL32:
2982 return bfd_reloc_notsupported;
2983
2984 case R_ARM_RABS32:
2985 return bfd_reloc_notsupported;
2986
2987 case R_ARM_RPC24:
2988 return bfd_reloc_notsupported;
2989
2990 case R_ARM_RBASE:
2991 return bfd_reloc_notsupported;
2992
2993 case R_ARM_V4BX:
2994 if (globals->fix_v4bx)
2995 {
2996 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
2997
2998 /* Ensure that we have a BX instruction. */
2999 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
3000
3001 /* Preserve Rm (lowest four bits) and the condition code
3002 (highest four bits). Other bits encode MOV PC,Rm. */
3003 insn = (insn & 0xf000000f) | 0x01a0f000;
3004
3005 bfd_put_32 (input_bfd, insn, hit_data);
3006 }
3007 return bfd_reloc_ok;
3008
3009 default:
3010 return bfd_reloc_notsupported;
3011 }
3012 }
3013
3014 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
3015 static void
3016 arm_add_to_rel (bfd * abfd,
3017 bfd_byte * address,
3018 reloc_howto_type * howto,
3019 bfd_signed_vma increment)
3020 {
3021 bfd_signed_vma addend;
3022
3023 if (howto->type == R_ARM_THM_PC22)
3024 {
3025 int upper_insn, lower_insn;
3026 int upper, lower;
3027
3028 upper_insn = bfd_get_16 (abfd, address);
3029 lower_insn = bfd_get_16 (abfd, address + 2);
3030 upper = upper_insn & 0x7ff;
3031 lower = lower_insn & 0x7ff;
3032
3033 addend = (upper << 12) | (lower << 1);
3034 addend += increment;
3035 addend >>= 1;
3036
3037 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3038 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3039
3040 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3041 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3042 }
3043 else
3044 {
3045 bfd_vma contents;
3046
3047 contents = bfd_get_32 (abfd, address);
3048
3049 /* Get the (signed) value from the instruction. */
3050 addend = contents & howto->src_mask;
3051 if (addend & ((howto->src_mask + 1) >> 1))
3052 {
3053 bfd_signed_vma mask;
3054
3055 mask = -1;
3056 mask &= ~ howto->src_mask;
3057 addend |= mask;
3058 }
3059
3060 /* Add in the increment, (which is a byte value). */
3061 switch (howto->type)
3062 {
3063 default:
3064 addend += increment;
3065 break;
3066
3067 case R_ARM_PC24:
3068 #ifndef OLD_ARM_ABI
3069 case R_ARM_CALL:
3070 case R_ARM_JUMP24:
3071 #endif
3072 addend <<= howto->size;
3073 addend += increment;
3074
3075 /* Should we check for overflow here ? */
3076
3077 /* Drop any undesired bits. */
3078 addend >>= howto->rightshift;
3079 break;
3080 }
3081
3082 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3083
3084 bfd_put_32 (abfd, contents, address);
3085 }
3086 }
3087
3088 /* Relocate an ARM ELF section. */
3089 static bfd_boolean
3090 elf32_arm_relocate_section (bfd * output_bfd,
3091 struct bfd_link_info * info,
3092 bfd * input_bfd,
3093 asection * input_section,
3094 bfd_byte * contents,
3095 Elf_Internal_Rela * relocs,
3096 Elf_Internal_Sym * local_syms,
3097 asection ** local_sections)
3098 {
3099 Elf_Internal_Shdr *symtab_hdr;
3100 struct elf_link_hash_entry **sym_hashes;
3101 Elf_Internal_Rela *rel;
3102 Elf_Internal_Rela *relend;
3103 const char *name;
3104 struct elf32_arm_link_hash_table * globals;
3105
3106 globals = elf32_arm_hash_table (info);
3107 if (info->relocatable && !globals->use_rel)
3108 return TRUE;
3109
3110 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3111 sym_hashes = elf_sym_hashes (input_bfd);
3112
3113 rel = relocs;
3114 relend = relocs + input_section->reloc_count;
3115 for (; rel < relend; rel++)
3116 {
3117 int r_type;
3118 reloc_howto_type * howto;
3119 unsigned long r_symndx;
3120 Elf_Internal_Sym * sym;
3121 asection * sec;
3122 struct elf_link_hash_entry * h;
3123 bfd_vma relocation;
3124 bfd_reloc_status_type r;
3125 arelent bfd_reloc;
3126
3127 r_symndx = ELF32_R_SYM (rel->r_info);
3128 r_type = ELF32_R_TYPE (rel->r_info);
3129 r_type = arm_real_reloc_type (globals, r_type);
3130
3131 if ( r_type == R_ARM_GNU_VTENTRY
3132 || r_type == R_ARM_GNU_VTINHERIT)
3133 continue;
3134
3135 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
3136 howto = bfd_reloc.howto;
3137
3138 if (info->relocatable && globals->use_rel)
3139 {
3140 /* This is a relocatable link. We don't have to change
3141 anything, unless the reloc is against a section symbol,
3142 in which case we have to adjust according to where the
3143 section symbol winds up in the output section. */
3144 if (r_symndx < symtab_hdr->sh_info)
3145 {
3146 sym = local_syms + r_symndx;
3147 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3148 {
3149 sec = local_sections[r_symndx];
3150 arm_add_to_rel (input_bfd, contents + rel->r_offset,
3151 howto,
3152 (bfd_signed_vma) (sec->output_offset
3153 + sym->st_value));
3154 }
3155 }
3156
3157 continue;
3158 }
3159
3160 /* This is a final link. */
3161 h = NULL;
3162 sym = NULL;
3163 sec = NULL;
3164
3165 if (r_symndx < symtab_hdr->sh_info)
3166 {
3167 sym = local_syms + r_symndx;
3168 sec = local_sections[r_symndx];
3169 if (globals->use_rel)
3170 {
3171 relocation = (sec->output_section->vma
3172 + sec->output_offset
3173 + sym->st_value);
3174 if ((sec->flags & SEC_MERGE)
3175 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3176 {
3177 asection *msec;
3178 bfd_vma addend, value;
3179
3180 if (howto->rightshift)
3181 {
3182 (*_bfd_error_handler)
3183 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3184 input_bfd, input_section,
3185 (long) rel->r_offset, howto->name);
3186 return FALSE;
3187 }
3188
3189 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
3190
3191 /* Get the (signed) value from the instruction. */
3192 addend = value & howto->src_mask;
3193 if (addend & ((howto->src_mask + 1) >> 1))
3194 {
3195 bfd_signed_vma mask;
3196
3197 mask = -1;
3198 mask &= ~ howto->src_mask;
3199 addend |= mask;
3200 }
3201 msec = sec;
3202 addend =
3203 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3204 - relocation;
3205 addend += msec->output_section->vma + msec->output_offset;
3206 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3207 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
3208 }
3209 }
3210 else
3211 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3212 }
3213 else
3214 {
3215 bfd_boolean warned;
3216 bfd_boolean unresolved_reloc;
3217
3218 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3219 r_symndx, symtab_hdr, sym_hashes,
3220 h, sec, relocation,
3221 unresolved_reloc, warned);
3222
3223 if (unresolved_reloc || relocation != 0)
3224 {
3225 /* In these cases, we don't need the relocation value.
3226 We check specially because in some obscure cases
3227 sec->output_section will be NULL. */
3228 switch (r_type)
3229 {
3230 case R_ARM_PC24:
3231 #ifndef OLD_ARM_ABI
3232 case R_ARM_CALL:
3233 case R_ARM_JUMP24:
3234 case R_ARM_PREL31:
3235 #endif
3236 case R_ARM_ABS32:
3237 case R_ARM_THM_PC22:
3238 case R_ARM_PLT32:
3239
3240 if (info->shared
3241 && ((!info->symbolic && h->dynindx != -1)
3242 || !h->def_regular)
3243 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3244 && ((input_section->flags & SEC_ALLOC) != 0
3245 /* DWARF will emit R_ARM_ABS32 relocations in its
3246 sections against symbols defined externally
3247 in shared libraries. We can't do anything
3248 with them here. */
3249 || ((input_section->flags & SEC_DEBUGGING) != 0
3250 && h->def_dynamic))
3251 )
3252 relocation = 0;
3253 break;
3254
3255 case R_ARM_GOTPC:
3256 relocation = 0;
3257 break;
3258
3259 case R_ARM_GOT32:
3260 #ifndef OLD_ARM_ABI
3261 case R_ARM_GOT_PREL:
3262 #endif
3263 if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
3264 (elf_hash_table (info)->dynamic_sections_created,
3265 info->shared, h))
3266 && (!info->shared
3267 || (!info->symbolic && h->dynindx != -1)
3268 || !h->def_regular))
3269 relocation = 0;
3270 break;
3271
3272 default:
3273 if (unresolved_reloc)
3274 _bfd_error_handler
3275 (_("%B(%A): warning: unresolvable relocation %d against symbol `%s'"),
3276 input_bfd, input_section,
3277 r_type,
3278 h->root.root.string);
3279 break;
3280 }
3281 }
3282 }
3283
3284 if (h != NULL)
3285 name = h->root.root.string;
3286 else
3287 {
3288 name = (bfd_elf_string_from_elf_section
3289 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3290 if (name == NULL || *name == '\0')
3291 name = bfd_section_name (input_bfd, sec);
3292 }
3293
3294 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3295 input_section, contents, rel,
3296 relocation, info, sec, name,
3297 (h ? ELF_ST_TYPE (h->type) :
3298 ELF_ST_TYPE (sym->st_info)), h);
3299
3300 if (r != bfd_reloc_ok)
3301 {
3302 const char * msg = (const char *) 0;
3303
3304 switch (r)
3305 {
3306 case bfd_reloc_overflow:
3307 /* If the overflowing reloc was to an undefined symbol,
3308 we have already printed one error message and there
3309 is no point complaining again. */
3310 if ((! h ||
3311 h->root.type != bfd_link_hash_undefined)
3312 && (!((*info->callbacks->reloc_overflow)
3313 (info, (h ? &h->root : NULL), name, howto->name,
3314 (bfd_vma) 0, input_bfd, input_section,
3315 rel->r_offset))))
3316 return FALSE;
3317 break;
3318
3319 case bfd_reloc_undefined:
3320 if (!((*info->callbacks->undefined_symbol)
3321 (info, name, input_bfd, input_section,
3322 rel->r_offset, TRUE)))
3323 return FALSE;
3324 break;
3325
3326 case bfd_reloc_outofrange:
3327 msg = _("internal error: out of range error");
3328 goto common_error;
3329
3330 case bfd_reloc_notsupported:
3331 msg = _("internal error: unsupported relocation error");
3332 goto common_error;
3333
3334 case bfd_reloc_dangerous:
3335 msg = _("internal error: dangerous error");
3336 goto common_error;
3337
3338 default:
3339 msg = _("internal error: unknown error");
3340 /* fall through */
3341
3342 common_error:
3343 if (!((*info->callbacks->warning)
3344 (info, msg, name, input_bfd, input_section,
3345 rel->r_offset)))
3346 return FALSE;
3347 break;
3348 }
3349 }
3350 }
3351
3352 return TRUE;
3353 }
3354
3355 /* Set the right machine number. */
3356
3357 static bfd_boolean
3358 elf32_arm_object_p (bfd *abfd)
3359 {
3360 unsigned int mach;
3361
3362 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
3363
3364 if (mach != bfd_mach_arm_unknown)
3365 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3366
3367 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3368 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
3369
3370 else
3371 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3372
3373 return TRUE;
3374 }
3375
3376 /* Function to keep ARM specific flags in the ELF header. */
3377
3378 static bfd_boolean
3379 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
3380 {
3381 if (elf_flags_init (abfd)
3382 && elf_elfheader (abfd)->e_flags != flags)
3383 {
3384 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3385 {
3386 if (flags & EF_ARM_INTERWORK)
3387 (*_bfd_error_handler)
3388 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3389 abfd);
3390 else
3391 _bfd_error_handler
3392 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3393 abfd);
3394 }
3395 }
3396 else
3397 {
3398 elf_elfheader (abfd)->e_flags = flags;
3399 elf_flags_init (abfd) = TRUE;
3400 }
3401
3402 return TRUE;
3403 }
3404
3405 /* Copy backend specific data from one object module to another. */
3406
3407 static bfd_boolean
3408 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3409 {
3410 flagword in_flags;
3411 flagword out_flags;
3412
3413 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3414 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3415 return TRUE;
3416
3417 in_flags = elf_elfheader (ibfd)->e_flags;
3418 out_flags = elf_elfheader (obfd)->e_flags;
3419
3420 if (elf_flags_init (obfd)
3421 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3422 && in_flags != out_flags)
3423 {
3424 /* Cannot mix APCS26 and APCS32 code. */
3425 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3426 return FALSE;
3427
3428 /* Cannot mix float APCS and non-float APCS code. */
3429 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3430 return FALSE;
3431
3432 /* If the src and dest have different interworking flags
3433 then turn off the interworking bit. */
3434 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3435 {
3436 if (out_flags & EF_ARM_INTERWORK)
3437 _bfd_error_handler
3438 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3439 obfd, ibfd);
3440
3441 in_flags &= ~EF_ARM_INTERWORK;
3442 }
3443
3444 /* Likewise for PIC, though don't warn for this case. */
3445 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3446 in_flags &= ~EF_ARM_PIC;
3447 }
3448
3449 elf_elfheader (obfd)->e_flags = in_flags;
3450 elf_flags_init (obfd) = TRUE;
3451
3452 /* Also copy the EI_OSABI field. */
3453 elf_elfheader (obfd)->e_ident[EI_OSABI] =
3454 elf_elfheader (ibfd)->e_ident[EI_OSABI];
3455
3456 return TRUE;
3457 }
3458
3459 /* Merge backend specific data from an object file to the output
3460 object file when linking. */
3461
3462 static bfd_boolean
3463 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
3464 {
3465 flagword out_flags;
3466 flagword in_flags;
3467 bfd_boolean flags_compatible = TRUE;
3468 asection *sec;
3469
3470 /* Check if we have the same endianess. */
3471 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3472 return FALSE;
3473
3474 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3475 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3476 return TRUE;
3477
3478 /* The input BFD must have had its flags initialised. */
3479 /* The following seems bogus to me -- The flags are initialized in
3480 the assembler but I don't think an elf_flags_init field is
3481 written into the object. */
3482 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3483
3484 in_flags = elf_elfheader (ibfd)->e_flags;
3485 out_flags = elf_elfheader (obfd)->e_flags;
3486
3487 if (!elf_flags_init (obfd))
3488 {
3489 /* If the input is the default architecture and had the default
3490 flags then do not bother setting the flags for the output
3491 architecture, instead allow future merges to do this. If no
3492 future merges ever set these flags then they will retain their
3493 uninitialised values, which surprise surprise, correspond
3494 to the default values. */
3495 if (bfd_get_arch_info (ibfd)->the_default
3496 && elf_elfheader (ibfd)->e_flags == 0)
3497 return TRUE;
3498
3499 elf_flags_init (obfd) = TRUE;
3500 elf_elfheader (obfd)->e_flags = in_flags;
3501
3502 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3503 && bfd_get_arch_info (obfd)->the_default)
3504 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3505
3506 return TRUE;
3507 }
3508
3509 /* Determine what should happen if the input ARM architecture
3510 does not match the output ARM architecture. */
3511 if (! bfd_arm_merge_machines (ibfd, obfd))
3512 return FALSE;
3513
3514 /* Identical flags must be compatible. */
3515 if (in_flags == out_flags)
3516 return TRUE;
3517
3518 /* Check to see if the input BFD actually contains any sections. If
3519 not, its flags may not have been initialised either, but it
3520 cannot actually cause any incompatibility. Do not short-circuit
3521 dynamic objects; their section list may be emptied by
3522 elf_link_add_object_symbols.
3523
3524 Also check to see if there are no code sections in the input.
3525 In this case there is no need to check for code specific flags.
3526 XXX - do we need to worry about floating-point format compatability
3527 in data sections ? */
3528 if (!(ibfd->flags & DYNAMIC))
3529 {
3530 bfd_boolean null_input_bfd = TRUE;
3531 bfd_boolean only_data_sections = TRUE;
3532
3533 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3534 {
3535 /* Ignore synthetic glue sections. */
3536 if (strcmp (sec->name, ".glue_7")
3537 && strcmp (sec->name, ".glue_7t"))
3538 {
3539 if ((bfd_get_section_flags (ibfd, sec)
3540 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3541 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
3542 only_data_sections = FALSE;
3543
3544 null_input_bfd = FALSE;
3545 break;
3546 }
3547 }
3548
3549 if (null_input_bfd || only_data_sections)
3550 return TRUE;
3551 }
3552
3553 /* Complain about various flag mismatches. */
3554 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
3555 {
3556 _bfd_error_handler
3557 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
3558 ibfd, obfd,
3559 (in_flags & EF_ARM_EABIMASK) >> 24,
3560 (out_flags & EF_ARM_EABIMASK) >> 24);
3561 return FALSE;
3562 }
3563
3564 /* Not sure what needs to be checked for EABI versions >= 1. */
3565 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
3566 {
3567 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3568 {
3569 _bfd_error_handler
3570 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
3571 ibfd, obfd,
3572 in_flags & EF_ARM_APCS_26 ? 26 : 32,
3573 out_flags & EF_ARM_APCS_26 ? 26 : 32);
3574 flags_compatible = FALSE;
3575 }
3576
3577 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3578 {
3579 if (in_flags & EF_ARM_APCS_FLOAT)
3580 _bfd_error_handler
3581 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
3582 ibfd, obfd);
3583 else
3584 _bfd_error_handler
3585 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
3586 ibfd, obfd);
3587
3588 flags_compatible = FALSE;
3589 }
3590
3591 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
3592 {
3593 if (in_flags & EF_ARM_VFP_FLOAT)
3594 _bfd_error_handler
3595 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
3596 ibfd, obfd);
3597 else
3598 _bfd_error_handler
3599 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
3600 ibfd, obfd);
3601
3602 flags_compatible = FALSE;
3603 }
3604
3605 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
3606 {
3607 if (in_flags & EF_ARM_MAVERICK_FLOAT)
3608 _bfd_error_handler
3609 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
3610 ibfd, obfd);
3611 else
3612 _bfd_error_handler
3613 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
3614 ibfd, obfd);
3615
3616 flags_compatible = FALSE;
3617 }
3618
3619 #ifdef EF_ARM_SOFT_FLOAT
3620 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
3621 {
3622 /* We can allow interworking between code that is VFP format
3623 layout, and uses either soft float or integer regs for
3624 passing floating point arguments and results. We already
3625 know that the APCS_FLOAT flags match; similarly for VFP
3626 flags. */
3627 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
3628 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
3629 {
3630 if (in_flags & EF_ARM_SOFT_FLOAT)
3631 _bfd_error_handler
3632 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
3633 ibfd, obfd);
3634 else
3635 _bfd_error_handler
3636 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
3637 ibfd, obfd);
3638
3639 flags_compatible = FALSE;
3640 }
3641 }
3642 #endif
3643
3644 /* Interworking mismatch is only a warning. */
3645 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3646 {
3647 if (in_flags & EF_ARM_INTERWORK)
3648 {
3649 _bfd_error_handler
3650 (_("Warning: %B supports interworking, whereas %B does not"),
3651 ibfd, obfd);
3652 }
3653 else
3654 {
3655 _bfd_error_handler
3656 (_("Warning: %B does not support interworking, whereas %B does"),
3657 ibfd, obfd);
3658 }
3659 }
3660 }
3661
3662 return flags_compatible;
3663 }
3664
3665 /* Display the flags field. */
3666
3667 static bfd_boolean
3668 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
3669 {
3670 FILE * file = (FILE *) ptr;
3671 unsigned long flags;
3672
3673 BFD_ASSERT (abfd != NULL && ptr != NULL);
3674
3675 /* Print normal ELF private data. */
3676 _bfd_elf_print_private_bfd_data (abfd, ptr);
3677
3678 flags = elf_elfheader (abfd)->e_flags;
3679 /* Ignore init flag - it may not be set, despite the flags field
3680 containing valid data. */
3681
3682 /* xgettext:c-format */
3683 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3684
3685 switch (EF_ARM_EABI_VERSION (flags))
3686 {
3687 case EF_ARM_EABI_UNKNOWN:
3688 /* The following flag bits are GNU extensions and not part of the
3689 official ARM ELF extended ABI. Hence they are only decoded if
3690 the EABI version is not set. */
3691 if (flags & EF_ARM_INTERWORK)
3692 fprintf (file, _(" [interworking enabled]"));
3693
3694 if (flags & EF_ARM_APCS_26)
3695 fprintf (file, " [APCS-26]");
3696 else
3697 fprintf (file, " [APCS-32]");
3698
3699 if (flags & EF_ARM_VFP_FLOAT)
3700 fprintf (file, _(" [VFP float format]"));
3701 else if (flags & EF_ARM_MAVERICK_FLOAT)
3702 fprintf (file, _(" [Maverick float format]"));
3703 else
3704 fprintf (file, _(" [FPA float format]"));
3705
3706 if (flags & EF_ARM_APCS_FLOAT)
3707 fprintf (file, _(" [floats passed in float registers]"));
3708
3709 if (flags & EF_ARM_PIC)
3710 fprintf (file, _(" [position independent]"));
3711
3712 if (flags & EF_ARM_NEW_ABI)
3713 fprintf (file, _(" [new ABI]"));
3714
3715 if (flags & EF_ARM_OLD_ABI)
3716 fprintf (file, _(" [old ABI]"));
3717
3718 if (flags & EF_ARM_SOFT_FLOAT)
3719 fprintf (file, _(" [software FP]"));
3720
3721 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
3722 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
3723 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
3724 | EF_ARM_MAVERICK_FLOAT);
3725 break;
3726
3727 case EF_ARM_EABI_VER1:
3728 fprintf (file, _(" [Version1 EABI]"));
3729
3730 if (flags & EF_ARM_SYMSARESORTED)
3731 fprintf (file, _(" [sorted symbol table]"));
3732 else
3733 fprintf (file, _(" [unsorted symbol table]"));
3734
3735 flags &= ~ EF_ARM_SYMSARESORTED;
3736 break;
3737
3738 case EF_ARM_EABI_VER2:
3739 fprintf (file, _(" [Version2 EABI]"));
3740
3741 if (flags & EF_ARM_SYMSARESORTED)
3742 fprintf (file, _(" [sorted symbol table]"));
3743 else
3744 fprintf (file, _(" [unsorted symbol table]"));
3745
3746 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
3747 fprintf (file, _(" [dynamic symbols use segment index]"));
3748
3749 if (flags & EF_ARM_MAPSYMSFIRST)
3750 fprintf (file, _(" [mapping symbols precede others]"));
3751
3752 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
3753 | EF_ARM_MAPSYMSFIRST);
3754 break;
3755
3756 case EF_ARM_EABI_VER3:
3757 fprintf (file, _(" [Version3 EABI]"));
3758 break;
3759
3760 case EF_ARM_EABI_VER4:
3761 fprintf (file, _(" [Version4 EABI]"));
3762
3763 if (flags & EF_ARM_BE8)
3764 fprintf (file, _(" [BE8]"));
3765
3766 if (flags & EF_ARM_LE8)
3767 fprintf (file, _(" [LE8]"));
3768
3769 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
3770 break;
3771
3772 default:
3773 fprintf (file, _(" <EABI version unrecognised>"));
3774 break;
3775 }
3776
3777 flags &= ~ EF_ARM_EABIMASK;
3778
3779 if (flags & EF_ARM_RELEXEC)
3780 fprintf (file, _(" [relocatable executable]"));
3781
3782 if (flags & EF_ARM_HASENTRY)
3783 fprintf (file, _(" [has entry point]"));
3784
3785 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
3786
3787 if (flags)
3788 fprintf (file, _("<Unrecognised flag bits set>"));
3789
3790 fputc ('\n', file);
3791
3792 return TRUE;
3793 }
3794
3795 static int
3796 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
3797 {
3798 switch (ELF_ST_TYPE (elf_sym->st_info))
3799 {
3800 case STT_ARM_TFUNC:
3801 return ELF_ST_TYPE (elf_sym->st_info);
3802
3803 case STT_ARM_16BIT:
3804 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
3805 This allows us to distinguish between data used by Thumb instructions
3806 and non-data (which is probably code) inside Thumb regions of an
3807 executable. */
3808 if (type != STT_OBJECT)
3809 return ELF_ST_TYPE (elf_sym->st_info);
3810 break;
3811
3812 default:
3813 break;
3814 }
3815
3816 return type;
3817 }
3818
3819 static asection *
3820 elf32_arm_gc_mark_hook (asection * sec,
3821 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3822 Elf_Internal_Rela * rel,
3823 struct elf_link_hash_entry * h,
3824 Elf_Internal_Sym * sym)
3825 {
3826 if (h != NULL)
3827 {
3828 switch (ELF32_R_TYPE (rel->r_info))
3829 {
3830 case R_ARM_GNU_VTINHERIT:
3831 case R_ARM_GNU_VTENTRY:
3832 break;
3833
3834 default:
3835 switch (h->root.type)
3836 {
3837 case bfd_link_hash_defined:
3838 case bfd_link_hash_defweak:
3839 return h->root.u.def.section;
3840
3841 case bfd_link_hash_common:
3842 return h->root.u.c.p->section;
3843
3844 default:
3845 break;
3846 }
3847 }
3848 }
3849 else
3850 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3851
3852 return NULL;
3853 }
3854
3855 /* Update the got entry reference counts for the section being removed. */
3856
3857 static bfd_boolean
3858 elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
3859 struct bfd_link_info * info ATTRIBUTE_UNUSED,
3860 asection * sec ATTRIBUTE_UNUSED,
3861 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
3862 {
3863 Elf_Internal_Shdr *symtab_hdr;
3864 struct elf_link_hash_entry **sym_hashes;
3865 bfd_signed_vma *local_got_refcounts;
3866 const Elf_Internal_Rela *rel, *relend;
3867 struct elf32_arm_link_hash_table * globals;
3868
3869 globals = elf32_arm_hash_table (info);
3870
3871 elf_section_data (sec)->local_dynrel = NULL;
3872
3873 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3874 sym_hashes = elf_sym_hashes (abfd);
3875 local_got_refcounts = elf_local_got_refcounts (abfd);
3876
3877 relend = relocs + sec->reloc_count;
3878 for (rel = relocs; rel < relend; rel++)
3879 {
3880 unsigned long r_symndx;
3881 struct elf_link_hash_entry *h = NULL;
3882 int r_type;
3883
3884 r_symndx = ELF32_R_SYM (rel->r_info);
3885 if (r_symndx >= symtab_hdr->sh_info)
3886 {
3887 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3888 while (h->root.type == bfd_link_hash_indirect
3889 || h->root.type == bfd_link_hash_warning)
3890 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3891 }
3892
3893 r_type = ELF32_R_TYPE (rel->r_info);
3894 #ifndef OLD_ARM_ABI
3895 r_type = arm_real_reloc_type (globals, r_type);
3896 #endif
3897 switch (r_type)
3898 {
3899 case R_ARM_GOT32:
3900 #ifndef OLD_ARM_ABI
3901 case R_ARM_GOT_PREL:
3902 #endif
3903 if (h != NULL)
3904 {
3905 if (h->got.refcount > 0)
3906 h->got.refcount -= 1;
3907 }
3908 else if (local_got_refcounts != NULL)
3909 {
3910 if (local_got_refcounts[r_symndx] > 0)
3911 local_got_refcounts[r_symndx] -= 1;
3912 }
3913 break;
3914
3915 case R_ARM_ABS32:
3916 case R_ARM_REL32:
3917 case R_ARM_PC24:
3918 case R_ARM_PLT32:
3919 #ifndef OLD_ARM_ABI
3920 case R_ARM_CALL:
3921 case R_ARM_JUMP24:
3922 case R_ARM_PREL31:
3923 #endif
3924 case R_ARM_THM_PC22:
3925 /* Should the interworking branches be here also? */
3926
3927 if (h != NULL)
3928 {
3929 struct elf32_arm_link_hash_entry *eh;
3930 struct elf32_arm_relocs_copied **pp;
3931 struct elf32_arm_relocs_copied *p;
3932
3933 eh = (struct elf32_arm_link_hash_entry *) h;
3934
3935 if (h->plt.refcount > 0)
3936 {
3937 h->plt.refcount -= 1;
3938 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22)
3939 eh->plt_thumb_refcount--;
3940 }
3941
3942 if (r_type == R_ARM_ABS32
3943 || r_type == R_ARM_REL32)
3944 {
3945 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
3946 pp = &p->next)
3947 if (p->section == sec)
3948 {
3949 p->count -= 1;
3950 if (p->count == 0)
3951 *pp = p->next;
3952 break;
3953 }
3954 }
3955 }
3956 break;
3957
3958 default:
3959 break;
3960 }
3961 }
3962
3963 return TRUE;
3964 }
3965
3966 /* Look through the relocs for a section during the first phase. */
3967
3968 static bfd_boolean
3969 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
3970 asection *sec, const Elf_Internal_Rela *relocs)
3971 {
3972 Elf_Internal_Shdr *symtab_hdr;
3973 struct elf_link_hash_entry **sym_hashes;
3974 struct elf_link_hash_entry **sym_hashes_end;
3975 const Elf_Internal_Rela *rel;
3976 const Elf_Internal_Rela *rel_end;
3977 bfd *dynobj;
3978 asection *sreloc;
3979 bfd_vma *local_got_offsets;
3980 struct elf32_arm_link_hash_table *htab;
3981
3982 if (info->relocatable)
3983 return TRUE;
3984
3985 htab = elf32_arm_hash_table (info);
3986 sreloc = NULL;
3987
3988 dynobj = elf_hash_table (info)->dynobj;
3989 local_got_offsets = elf_local_got_offsets (abfd);
3990
3991 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3992 sym_hashes = elf_sym_hashes (abfd);
3993 sym_hashes_end = sym_hashes
3994 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
3995
3996 if (!elf_bad_symtab (abfd))
3997 sym_hashes_end -= symtab_hdr->sh_info;
3998
3999 rel_end = relocs + sec->reloc_count;
4000 for (rel = relocs; rel < rel_end; rel++)
4001 {
4002 struct elf_link_hash_entry *h;
4003 struct elf32_arm_link_hash_entry *eh;
4004 unsigned long r_symndx;
4005 int r_type;
4006
4007 r_symndx = ELF32_R_SYM (rel->r_info);
4008 r_type = ELF32_R_TYPE (rel->r_info);
4009 #ifndef OLD_ARM_ABI
4010 r_type = arm_real_reloc_type (htab, r_type);
4011 #endif
4012 if (r_symndx < symtab_hdr->sh_info)
4013 h = NULL;
4014 else
4015 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4016
4017 eh = (struct elf32_arm_link_hash_entry *) h;
4018
4019 switch (r_type)
4020 {
4021 case R_ARM_GOT32:
4022 #ifndef OLD_ARM_ABI
4023 case R_ARM_GOT_PREL:
4024 #endif
4025 /* This symbol requires a global offset table entry. */
4026 if (h != NULL)
4027 {
4028 h->got.refcount++;
4029 }
4030 else
4031 {
4032 bfd_signed_vma *local_got_refcounts;
4033
4034 /* This is a global offset table entry for a local symbol. */
4035 local_got_refcounts = elf_local_got_refcounts (abfd);
4036 if (local_got_refcounts == NULL)
4037 {
4038 bfd_size_type size;
4039
4040 size = symtab_hdr->sh_info;
4041 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4042 local_got_refcounts = bfd_zalloc (abfd, size);
4043 if (local_got_refcounts == NULL)
4044 return FALSE;
4045 elf_local_got_refcounts (abfd) = local_got_refcounts;
4046 }
4047 local_got_refcounts[r_symndx] += 1;
4048 }
4049 if (r_type == R_ARM_GOT32)
4050 break;
4051 /* Fall through. */
4052
4053 case R_ARM_GOTOFF:
4054 case R_ARM_GOTPC:
4055 if (htab->sgot == NULL)
4056 {
4057 if (htab->root.dynobj == NULL)
4058 htab->root.dynobj = abfd;
4059 if (!create_got_section (htab->root.dynobj, info))
4060 return FALSE;
4061 }
4062 break;
4063
4064 case R_ARM_ABS32:
4065 case R_ARM_REL32:
4066 case R_ARM_PC24:
4067 case R_ARM_PLT32:
4068 #ifndef OLD_ARM_ABI
4069 case R_ARM_CALL:
4070 case R_ARM_JUMP24:
4071 case R_ARM_PREL31:
4072 #endif
4073 case R_ARM_THM_PC22:
4074 /* Should the interworking branches be listed here? */
4075 if (h != NULL)
4076 {
4077 /* If this reloc is in a read-only section, we might
4078 need a copy reloc. We can't check reliably at this
4079 stage whether the section is read-only, as input
4080 sections have not yet been mapped to output sections.
4081 Tentatively set the flag for now, and correct in
4082 adjust_dynamic_symbol. */
4083 if (!info->shared)
4084 h->non_got_ref = 1;
4085
4086 /* We may need a .plt entry if the function this reloc
4087 refers to is in a different object. We can't tell for
4088 sure yet, because something later might force the
4089 symbol local. */
4090 if (r_type == R_ARM_PC24
4091 #ifndef OLD_ARM_ABI
4092 || r_type == R_ARM_CALL
4093 || r_type == R_ARM_JUMP24
4094 || r_type == R_ARM_PREL31
4095 #endif
4096 || r_type == R_ARM_PLT32
4097 || r_type == R_ARM_THM_PC22)
4098 h->needs_plt = 1;
4099
4100 /* If we create a PLT entry, this relocation will reference
4101 it, even if it's an ABS32 relocation. */
4102 h->plt.refcount += 1;
4103
4104 if (r_type == R_ARM_THM_PC22)
4105 eh->plt_thumb_refcount += 1;
4106 }
4107
4108 /* If we are creating a shared library, and this is a reloc
4109 against a global symbol, or a non PC relative reloc
4110 against a local symbol, then we need to copy the reloc
4111 into the shared library. However, if we are linking with
4112 -Bsymbolic, we do not need to copy a reloc against a
4113 global symbol which is defined in an object we are
4114 including in the link (i.e., DEF_REGULAR is set). At
4115 this point we have not seen all the input files, so it is
4116 possible that DEF_REGULAR is not set now but will be set
4117 later (it is never cleared). We account for that
4118 possibility below by storing information in the
4119 relocs_copied field of the hash table entry. */
4120 if (info->shared
4121 && (sec->flags & SEC_ALLOC) != 0
4122 && ((r_type != R_ARM_PC24
4123 && r_type != R_ARM_PLT32
4124 #ifndef OLD_ARM_ABI
4125 && r_type != R_ARM_CALL
4126 && r_type != R_ARM_JUMP24
4127 && r_type != R_ARM_PREL31
4128 #endif
4129 && r_type != R_ARM_REL32
4130 && r_type != R_ARM_THM_PC22)
4131 || (h != NULL
4132 && (! info->symbolic
4133 || !h->def_regular))))
4134 {
4135 struct elf32_arm_relocs_copied *p, **head;
4136
4137 /* When creating a shared object, we must copy these
4138 reloc types into the output file. We create a reloc
4139 section in dynobj and make room for this reloc. */
4140 if (sreloc == NULL)
4141 {
4142 const char * name;
4143
4144 name = (bfd_elf_string_from_elf_section
4145 (abfd,
4146 elf_elfheader (abfd)->e_shstrndx,
4147 elf_section_data (sec)->rel_hdr.sh_name));
4148 if (name == NULL)
4149 return FALSE;
4150
4151 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
4152 && strcmp (bfd_get_section_name (abfd, sec),
4153 name + 4) == 0);
4154
4155 sreloc = bfd_get_section_by_name (dynobj, name);
4156 if (sreloc == NULL)
4157 {
4158 flagword flags;
4159
4160 sreloc = bfd_make_section (dynobj, name);
4161 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4162 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4163 if ((sec->flags & SEC_ALLOC) != 0
4164 /* BPABI objects never have dynamic
4165 relocations mapped. */
4166 && !htab->symbian_p)
4167 flags |= SEC_ALLOC | SEC_LOAD;
4168 if (sreloc == NULL
4169 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4170 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
4171 return FALSE;
4172 }
4173
4174 elf_section_data (sec)->sreloc = sreloc;
4175 }
4176
4177 /* If this is a global symbol, we count the number of
4178 relocations we need for this symbol. */
4179 if (h != NULL)
4180 {
4181 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
4182 }
4183 else
4184 {
4185 /* Track dynamic relocs needed for local syms too.
4186 We really need local syms available to do this
4187 easily. Oh well. */
4188
4189 asection *s;
4190 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4191 sec, r_symndx);
4192 if (s == NULL)
4193 return FALSE;
4194
4195 head = ((struct elf32_arm_relocs_copied **)
4196 &elf_section_data (s)->local_dynrel);
4197 }
4198
4199 p = *head;
4200 if (p == NULL || p->section != sec)
4201 {
4202 bfd_size_type amt = sizeof *p;
4203
4204 p = bfd_alloc (htab->root.dynobj, amt);
4205 if (p == NULL)
4206 return FALSE;
4207 p->next = *head;
4208 *head = p;
4209 p->section = sec;
4210 p->count = 0;
4211 }
4212
4213 if (r_type == R_ARM_ABS32
4214 || r_type == R_ARM_REL32)
4215 p->count += 1;
4216 }
4217 break;
4218
4219 /* This relocation describes the C++ object vtable hierarchy.
4220 Reconstruct it for later use during GC. */
4221 case R_ARM_GNU_VTINHERIT:
4222 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4223 return FALSE;
4224 break;
4225
4226 /* This relocation describes which C++ vtable entries are actually
4227 used. Record for later use during GC. */
4228 case R_ARM_GNU_VTENTRY:
4229 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
4230 return FALSE;
4231 break;
4232 }
4233 }
4234
4235 return TRUE;
4236 }
4237
4238 static bfd_boolean
4239 is_arm_mapping_symbol_name (const char * name)
4240 {
4241 return (name != NULL)
4242 && (name[0] == '$')
4243 && ((name[1] == 'a') || (name[1] == 't') || (name[1] == 'd'))
4244 && (name[2] == 0);
4245 }
4246
4247 /* Treat mapping symbols as special target symbols. */
4248
4249 static bfd_boolean
4250 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
4251 {
4252 return is_arm_mapping_symbol_name (sym->name);
4253 }
4254
4255 /* This is a copy of elf_find_function() from elf.c except that
4256 ARM mapping symbols are ignored when looking for function names
4257 and STT_ARM_TFUNC is considered to a function type. */
4258
4259 static bfd_boolean
4260 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
4261 asection * section,
4262 asymbol ** symbols,
4263 bfd_vma offset,
4264 const char ** filename_ptr,
4265 const char ** functionname_ptr)
4266 {
4267 const char * filename = NULL;
4268 asymbol * func = NULL;
4269 bfd_vma low_func = 0;
4270 asymbol ** p;
4271
4272 for (p = symbols; *p != NULL; p++)
4273 {
4274 elf_symbol_type *q;
4275
4276 q = (elf_symbol_type *) *p;
4277
4278 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4279 {
4280 default:
4281 break;
4282 case STT_FILE:
4283 filename = bfd_asymbol_name (&q->symbol);
4284 break;
4285 case STT_FUNC:
4286 case STT_ARM_TFUNC:
4287 /* Skip $a and $t symbols. */
4288 if ((q->symbol.flags & BSF_LOCAL)
4289 && is_arm_mapping_symbol_name (q->symbol.name))
4290 continue;
4291 /* Fall through. */
4292 case STT_NOTYPE:
4293 if (bfd_get_section (&q->symbol) == section
4294 && q->symbol.value >= low_func
4295 && q->symbol.value <= offset)
4296 {
4297 func = (asymbol *) q;
4298 low_func = q->symbol.value;
4299 }
4300 break;
4301 }
4302 }
4303
4304 if (func == NULL)
4305 return FALSE;
4306
4307 if (filename_ptr)
4308 *filename_ptr = filename;
4309 if (functionname_ptr)
4310 *functionname_ptr = bfd_asymbol_name (func);
4311
4312 return TRUE;
4313 }
4314
4315
4316 /* Find the nearest line to a particular section and offset, for error
4317 reporting. This code is a duplicate of the code in elf.c, except
4318 that it uses arm_elf_find_function. */
4319
4320 static bfd_boolean
4321 elf32_arm_find_nearest_line (bfd * abfd,
4322 asection * section,
4323 asymbol ** symbols,
4324 bfd_vma offset,
4325 const char ** filename_ptr,
4326 const char ** functionname_ptr,
4327 unsigned int * line_ptr)
4328 {
4329 bfd_boolean found = FALSE;
4330
4331 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4332
4333 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4334 filename_ptr, functionname_ptr,
4335 line_ptr, 0,
4336 & elf_tdata (abfd)->dwarf2_find_line_info))
4337 {
4338 if (!*functionname_ptr)
4339 arm_elf_find_function (abfd, section, symbols, offset,
4340 *filename_ptr ? NULL : filename_ptr,
4341 functionname_ptr);
4342
4343 return TRUE;
4344 }
4345
4346 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4347 & found, filename_ptr,
4348 functionname_ptr, line_ptr,
4349 & elf_tdata (abfd)->line_info))
4350 return FALSE;
4351
4352 if (found && (*functionname_ptr || *line_ptr))
4353 return TRUE;
4354
4355 if (symbols == NULL)
4356 return FALSE;
4357
4358 if (! arm_elf_find_function (abfd, section, symbols, offset,
4359 filename_ptr, functionname_ptr))
4360 return FALSE;
4361
4362 *line_ptr = 0;
4363 return TRUE;
4364 }
4365
4366 /* Adjust a symbol defined by a dynamic object and referenced by a
4367 regular object. The current definition is in some section of the
4368 dynamic object, but we're not including those sections. We have to
4369 change the definition to something the rest of the link can
4370 understand. */
4371
4372 static bfd_boolean
4373 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
4374 struct elf_link_hash_entry * h)
4375 {
4376 bfd * dynobj;
4377 asection * s;
4378 unsigned int power_of_two;
4379 struct elf32_arm_link_hash_entry * eh;
4380
4381 dynobj = elf_hash_table (info)->dynobj;
4382
4383 /* Make sure we know what is going on here. */
4384 BFD_ASSERT (dynobj != NULL
4385 && (h->needs_plt
4386 || h->u.weakdef != NULL
4387 || (h->def_dynamic
4388 && h->ref_regular
4389 && !h->def_regular)));
4390
4391 eh = (struct elf32_arm_link_hash_entry *) h;
4392
4393 /* If this is a function, put it in the procedure linkage table. We
4394 will fill in the contents of the procedure linkage table later,
4395 when we know the address of the .got section. */
4396 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
4397 || h->needs_plt)
4398 {
4399 if (h->plt.refcount <= 0
4400 || SYMBOL_CALLS_LOCAL (info, h)
4401 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4402 && h->root.type == bfd_link_hash_undefweak))
4403 {
4404 /* This case can occur if we saw a PLT32 reloc in an input
4405 file, but the symbol was never referred to by a dynamic
4406 object, or if all references were garbage collected. In
4407 such a case, we don't actually need to build a procedure
4408 linkage table, and we can just do a PC24 reloc instead. */
4409 h->plt.offset = (bfd_vma) -1;
4410 eh->plt_thumb_refcount = 0;
4411 h->needs_plt = 0;
4412 }
4413
4414 return TRUE;
4415 }
4416 else
4417 {
4418 /* It's possible that we incorrectly decided a .plt reloc was
4419 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4420 in check_relocs. We can't decide accurately between function
4421 and non-function syms in check-relocs; Objects loaded later in
4422 the link may change h->type. So fix it now. */
4423 h->plt.offset = (bfd_vma) -1;
4424 eh->plt_thumb_refcount = 0;
4425 }
4426
4427 /* If this is a weak symbol, and there is a real definition, the
4428 processor independent code will have arranged for us to see the
4429 real definition first, and we can just use the same value. */
4430 if (h->u.weakdef != NULL)
4431 {
4432 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4433 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4434 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4435 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4436 return TRUE;
4437 }
4438
4439 /* This is a reference to a symbol defined by a dynamic object which
4440 is not a function. */
4441
4442 /* If we are creating a shared library, we must presume that the
4443 only references to the symbol are via the global offset table.
4444 For such cases we need not do anything here; the relocations will
4445 be handled correctly by relocate_section. */
4446 if (info->shared)
4447 return TRUE;
4448
4449 /* We must allocate the symbol in our .dynbss section, which will
4450 become part of the .bss section of the executable. There will be
4451 an entry for this symbol in the .dynsym section. The dynamic
4452 object will contain position independent code, so all references
4453 from the dynamic object to this symbol will go through the global
4454 offset table. The dynamic linker will use the .dynsym entry to
4455 determine the address it must put in the global offset table, so
4456 both the dynamic object and the regular object will refer to the
4457 same memory location for the variable. */
4458 s = bfd_get_section_by_name (dynobj, ".dynbss");
4459 BFD_ASSERT (s != NULL);
4460
4461 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4462 copy the initial value out of the dynamic object and into the
4463 runtime process image. We need to remember the offset into the
4464 .rel.bss section we are going to use. */
4465 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4466 {
4467 asection *srel;
4468
4469 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
4470 BFD_ASSERT (srel != NULL);
4471 srel->size += sizeof (Elf32_External_Rel);
4472 h->needs_copy = 1;
4473 }
4474
4475 /* We need to figure out the alignment required for this symbol. I
4476 have no idea how ELF linkers handle this. */
4477 power_of_two = bfd_log2 (h->size);
4478 if (power_of_two > 3)
4479 power_of_two = 3;
4480
4481 /* Apply the required alignment. */
4482 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4483 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4484 {
4485 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4486 return FALSE;
4487 }
4488
4489 /* Define the symbol as being at this point in the section. */
4490 h->root.u.def.section = s;
4491 h->root.u.def.value = s->size;
4492
4493 /* Increment the section size to make room for the symbol. */
4494 s->size += h->size;
4495
4496 return TRUE;
4497 }
4498
4499 /* Allocate space in .plt, .got and associated reloc sections for
4500 dynamic relocs. */
4501
4502 static bfd_boolean
4503 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
4504 {
4505 struct bfd_link_info *info;
4506 struct elf32_arm_link_hash_table *htab;
4507 struct elf32_arm_link_hash_entry *eh;
4508 struct elf32_arm_relocs_copied *p;
4509
4510 eh = (struct elf32_arm_link_hash_entry *) h;
4511
4512 if (h->root.type == bfd_link_hash_indirect)
4513 return TRUE;
4514
4515 if (h->root.type == bfd_link_hash_warning)
4516 /* When warning symbols are created, they **replace** the "real"
4517 entry in the hash table, thus we never get to see the real
4518 symbol in a hash traversal. So look at it now. */
4519 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4520
4521 info = (struct bfd_link_info *) inf;
4522 htab = elf32_arm_hash_table (info);
4523
4524 if (htab->root.dynamic_sections_created
4525 && h->plt.refcount > 0)
4526 {
4527 /* Make sure this symbol is output as a dynamic symbol.
4528 Undefined weak syms won't yet be marked as dynamic. */
4529 if (h->dynindx == -1
4530 && !h->forced_local)
4531 {
4532 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4533 return FALSE;
4534 }
4535
4536 if (info->shared
4537 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4538 {
4539 asection *s = htab->splt;
4540
4541 /* If this is the first .plt entry, make room for the special
4542 first entry. */
4543 if (s->size == 0)
4544 s->size += htab->plt_header_size;
4545
4546 h->plt.offset = s->size;
4547
4548 /* If we will insert a Thumb trampoline before this PLT, leave room
4549 for it. */
4550 if (!htab->symbian_p && eh->plt_thumb_refcount > 0)
4551 {
4552 h->plt.offset += PLT_THUMB_STUB_SIZE;
4553 s->size += PLT_THUMB_STUB_SIZE;
4554 }
4555
4556 /* If this symbol is not defined in a regular file, and we are
4557 not generating a shared library, then set the symbol to this
4558 location in the .plt. This is required to make function
4559 pointers compare as equal between the normal executable and
4560 the shared library. */
4561 if (! info->shared
4562 && !h->def_regular)
4563 {
4564 h->root.u.def.section = s;
4565 h->root.u.def.value = h->plt.offset;
4566
4567 /* Make sure the function is not marked as Thumb, in case
4568 it is the target of an ABS32 relocation, which will
4569 point to the PLT entry. */
4570 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
4571 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
4572 }
4573
4574 /* Make room for this entry. */
4575 s->size += htab->plt_entry_size;
4576
4577 if (!htab->symbian_p)
4578 {
4579 /* We also need to make an entry in the .got.plt section, which
4580 will be placed in the .got section by the linker script. */
4581 eh->plt_got_offset = htab->sgotplt->size;
4582 htab->sgotplt->size += 4;
4583 }
4584
4585 /* We also need to make an entry in the .rel.plt section. */
4586 htab->srelplt->size += sizeof (Elf32_External_Rel);
4587 }
4588 else
4589 {
4590 h->plt.offset = (bfd_vma) -1;
4591 h->needs_plt = 0;
4592 }
4593 }
4594 else
4595 {
4596 h->plt.offset = (bfd_vma) -1;
4597 h->needs_plt = 0;
4598 }
4599
4600 if (h->got.refcount > 0)
4601 {
4602 asection *s;
4603 bfd_boolean dyn;
4604
4605 /* Make sure this symbol is output as a dynamic symbol.
4606 Undefined weak syms won't yet be marked as dynamic. */
4607 if (h->dynindx == -1
4608 && !h->forced_local)
4609 {
4610 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4611 return FALSE;
4612 }
4613
4614 if (!htab->symbian_p)
4615 {
4616 s = htab->sgot;
4617 h->got.offset = s->size;
4618 s->size += 4;
4619 dyn = htab->root.dynamic_sections_created;
4620 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4621 || h->root.type != bfd_link_hash_undefweak)
4622 && (info->shared
4623 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
4624 htab->srelgot->size += sizeof (Elf32_External_Rel);
4625 }
4626 }
4627 else
4628 h->got.offset = (bfd_vma) -1;
4629
4630 if (eh->relocs_copied == NULL)
4631 return TRUE;
4632
4633 /* In the shared -Bsymbolic case, discard space allocated for
4634 dynamic pc-relative relocs against symbols which turn out to be
4635 defined in regular objects. For the normal shared case, discard
4636 space for pc-relative relocs that have become local due to symbol
4637 visibility changes. */
4638
4639 if (info->shared)
4640 {
4641 /* Discard relocs on undefined weak syms with non-default
4642 visibility. */
4643 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4644 && h->root.type == bfd_link_hash_undefweak)
4645 eh->relocs_copied = NULL;
4646 }
4647 else
4648 {
4649 /* For the non-shared case, discard space for relocs against
4650 symbols which turn out to need copy relocs or are not
4651 dynamic. */
4652
4653 if (!h->non_got_ref
4654 && ((h->def_dynamic
4655 && !h->def_regular)
4656 || (htab->root.dynamic_sections_created
4657 && (h->root.type == bfd_link_hash_undefweak
4658 || h->root.type == bfd_link_hash_undefined))))
4659 {
4660 /* Make sure this symbol is output as a dynamic symbol.
4661 Undefined weak syms won't yet be marked as dynamic. */
4662 if (h->dynindx == -1
4663 && !h->forced_local)
4664 {
4665 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4666 return FALSE;
4667 }
4668
4669 /* If that succeeded, we know we'll be keeping all the
4670 relocs. */
4671 if (h->dynindx != -1)
4672 goto keep;
4673 }
4674
4675 eh->relocs_copied = NULL;
4676
4677 keep: ;
4678 }
4679
4680 /* Finally, allocate space. */
4681 for (p = eh->relocs_copied; p != NULL; p = p->next)
4682 {
4683 asection *sreloc = elf_section_data (p->section)->sreloc;
4684 sreloc->size += p->count * sizeof (Elf32_External_Rel);
4685 }
4686
4687 return TRUE;
4688 }
4689
4690 /* Find any dynamic relocs that apply to read-only sections. */
4691
4692 static bfd_boolean
4693 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
4694 {
4695 struct elf32_arm_link_hash_entry *eh;
4696 struct elf32_arm_relocs_copied *p;
4697
4698 if (h->root.type == bfd_link_hash_warning)
4699 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4700
4701 eh = (struct elf32_arm_link_hash_entry *) h;
4702 for (p = eh->relocs_copied; p != NULL; p = p->next)
4703 {
4704 asection *s = p->section;
4705
4706 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4707 {
4708 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4709
4710 info->flags |= DF_TEXTREL;
4711
4712 /* Not an error, just cut short the traversal. */
4713 return FALSE;
4714 }
4715 }
4716 return TRUE;
4717 }
4718
4719 /* Set the sizes of the dynamic sections. */
4720
4721 static bfd_boolean
4722 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4723 struct bfd_link_info * info)
4724 {
4725 bfd * dynobj;
4726 asection * s;
4727 bfd_boolean plt;
4728 bfd_boolean relocs;
4729 bfd *ibfd;
4730 struct elf32_arm_link_hash_table *htab;
4731
4732 htab = elf32_arm_hash_table (info);
4733 dynobj = elf_hash_table (info)->dynobj;
4734 BFD_ASSERT (dynobj != NULL);
4735
4736 if (elf_hash_table (info)->dynamic_sections_created)
4737 {
4738 /* Set the contents of the .interp section to the interpreter. */
4739 if (info->executable)
4740 {
4741 s = bfd_get_section_by_name (dynobj, ".interp");
4742 BFD_ASSERT (s != NULL);
4743 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4744 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4745 }
4746 }
4747
4748 /* Set up .got offsets for local syms, and space for local dynamic
4749 relocs. */
4750 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4751 {
4752 bfd_signed_vma *local_got;
4753 bfd_signed_vma *end_local_got;
4754 char *local_tls_type;
4755 bfd_size_type locsymcount;
4756 Elf_Internal_Shdr *symtab_hdr;
4757 asection *srel;
4758
4759 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
4760 continue;
4761
4762 for (s = ibfd->sections; s != NULL; s = s->next)
4763 {
4764 struct elf32_arm_relocs_copied *p;
4765
4766 for (p = *((struct elf32_arm_relocs_copied **)
4767 &elf_section_data (s)->local_dynrel);
4768 p != NULL;
4769 p = p->next)
4770 {
4771 if (!bfd_is_abs_section (p->section)
4772 && bfd_is_abs_section (p->section->output_section))
4773 {
4774 /* Input section has been discarded, either because
4775 it is a copy of a linkonce section or due to
4776 linker script /DISCARD/, so we'll be discarding
4777 the relocs too. */
4778 }
4779 else if (p->count != 0)
4780 {
4781 srel = elf_section_data (p->section)->sreloc;
4782 srel->size += p->count * sizeof (Elf32_External_Rel);
4783 if ((p->section->output_section->flags & SEC_READONLY) != 0)
4784 info->flags |= DF_TEXTREL;
4785 }
4786 }
4787 }
4788
4789 local_got = elf_local_got_refcounts (ibfd);
4790 if (!local_got)
4791 continue;
4792
4793 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4794 locsymcount = symtab_hdr->sh_info;
4795 end_local_got = local_got + locsymcount;
4796 s = htab->sgot;
4797 srel = htab->srelgot;
4798 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
4799 {
4800 if (*local_got > 0)
4801 {
4802 *local_got = s->size;
4803 s->size += 4;
4804 if (info->shared)
4805 srel->size += sizeof (Elf32_External_Rel);
4806 }
4807 else
4808 *local_got = (bfd_vma) -1;
4809 }
4810 }
4811
4812 /* Allocate global sym .plt and .got entries, and space for global
4813 sym dynamic relocs. */
4814 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
4815
4816 /* The check_relocs and adjust_dynamic_symbol entry points have
4817 determined the sizes of the various dynamic sections. Allocate
4818 memory for them. */
4819 plt = FALSE;
4820 relocs = FALSE;
4821 for (s = dynobj->sections; s != NULL; s = s->next)
4822 {
4823 const char * name;
4824 bfd_boolean strip;
4825
4826 if ((s->flags & SEC_LINKER_CREATED) == 0)
4827 continue;
4828
4829 /* It's OK to base decisions on the section name, because none
4830 of the dynobj section names depend upon the input files. */
4831 name = bfd_get_section_name (dynobj, s);
4832
4833 strip = FALSE;
4834
4835 if (strcmp (name, ".plt") == 0)
4836 {
4837 if (s->size == 0)
4838 {
4839 /* Strip this section if we don't need it; see the
4840 comment below. */
4841 strip = TRUE;
4842 }
4843 else
4844 {
4845 /* Remember whether there is a PLT. */
4846 plt = TRUE;
4847 }
4848 }
4849 else if (strncmp (name, ".rel", 4) == 0)
4850 {
4851 if (s->size == 0)
4852 {
4853 /* If we don't need this section, strip it from the
4854 output file. This is mostly to handle .rel.bss and
4855 .rel.plt. We must create both sections in
4856 create_dynamic_sections, because they must be created
4857 before the linker maps input sections to output
4858 sections. The linker does that before
4859 adjust_dynamic_symbol is called, and it is that
4860 function which decides whether anything needs to go
4861 into these sections. */
4862 strip = TRUE;
4863 }
4864 else
4865 {
4866 /* Remember whether there are any reloc sections other
4867 than .rel.plt. */
4868 if (strcmp (name, ".rel.plt") != 0)
4869 relocs = TRUE;
4870
4871 /* We use the reloc_count field as a counter if we need
4872 to copy relocs into the output file. */
4873 s->reloc_count = 0;
4874 }
4875 }
4876 else if (strncmp (name, ".got", 4) != 0)
4877 {
4878 /* It's not one of our sections, so don't allocate space. */
4879 continue;
4880 }
4881
4882 if (strip)
4883 {
4884 _bfd_strip_section_from_output (info, s);
4885 continue;
4886 }
4887
4888 /* Allocate memory for the section contents. */
4889 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4890 if (s->contents == NULL && s->size != 0)
4891 return FALSE;
4892 }
4893
4894 if (elf_hash_table (info)->dynamic_sections_created)
4895 {
4896 /* Add some entries to the .dynamic section. We fill in the
4897 values later, in elf32_arm_finish_dynamic_sections, but we
4898 must add the entries now so that we get the correct size for
4899 the .dynamic section. The DT_DEBUG entry is filled in by the
4900 dynamic linker and used by the debugger. */
4901 #define add_dynamic_entry(TAG, VAL) \
4902 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4903
4904 if (!info->shared)
4905 {
4906 if (!add_dynamic_entry (DT_DEBUG, 0))
4907 return FALSE;
4908 }
4909
4910 if (plt)
4911 {
4912 if ( !add_dynamic_entry (DT_PLTGOT, 0)
4913 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4914 || !add_dynamic_entry (DT_PLTREL, DT_REL)
4915 || !add_dynamic_entry (DT_JMPREL, 0))
4916 return FALSE;
4917 }
4918
4919 if (relocs)
4920 {
4921 if ( !add_dynamic_entry (DT_REL, 0)
4922 || !add_dynamic_entry (DT_RELSZ, 0)
4923 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
4924 return FALSE;
4925 }
4926
4927 /* If any dynamic relocs apply to a read-only section,
4928 then we need a DT_TEXTREL entry. */
4929 if ((info->flags & DF_TEXTREL) == 0)
4930 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
4931 (PTR) info);
4932
4933 if ((info->flags & DF_TEXTREL) != 0)
4934 {
4935 if (!add_dynamic_entry (DT_TEXTREL, 0))
4936 return FALSE;
4937 info->flags |= DF_TEXTREL;
4938 }
4939 }
4940 #undef add_synamic_entry
4941
4942 return TRUE;
4943 }
4944
4945 /* Finish up dynamic symbol handling. We set the contents of various
4946 dynamic sections here. */
4947
4948 static bfd_boolean
4949 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
4950 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
4951 {
4952 bfd * dynobj;
4953 struct elf32_arm_link_hash_table *htab;
4954 struct elf32_arm_link_hash_entry *eh;
4955
4956 dynobj = elf_hash_table (info)->dynobj;
4957 htab = elf32_arm_hash_table (info);
4958 eh = (struct elf32_arm_link_hash_entry *) h;
4959
4960 if (h->plt.offset != (bfd_vma) -1)
4961 {
4962 asection * splt;
4963 asection * srel;
4964 bfd_byte *loc;
4965 bfd_vma plt_index;
4966 Elf_Internal_Rela rel;
4967
4968 /* This symbol has an entry in the procedure linkage table. Set
4969 it up. */
4970
4971 BFD_ASSERT (h->dynindx != -1);
4972
4973 splt = bfd_get_section_by_name (dynobj, ".plt");
4974 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
4975 BFD_ASSERT (splt != NULL && srel != NULL);
4976
4977 /* Fill in the entry in the procedure linkage table. */
4978 if (htab->symbian_p)
4979 {
4980 unsigned i;
4981 for (i = 0; i < htab->plt_entry_size / 4; ++i)
4982 bfd_put_32 (output_bfd,
4983 elf32_arm_symbian_plt_entry[i],
4984 splt->contents + h->plt.offset + 4 * i);
4985
4986 /* Fill in the entry in the .rel.plt section. */
4987 rel.r_offset = (splt->output_section->vma
4988 + splt->output_offset
4989 + h->plt.offset + 4 * (i - 1));
4990 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
4991
4992 /* Get the index in the procedure linkage table which
4993 corresponds to this symbol. This is the index of this symbol
4994 in all the symbols for which we are making plt entries. The
4995 first entry in the procedure linkage table is reserved. */
4996 plt_index = ((h->plt.offset - htab->plt_header_size)
4997 / htab->plt_entry_size);
4998 }
4999 else
5000 {
5001 bfd_vma got_offset;
5002 bfd_vma got_displacement;
5003 asection * sgot;
5004
5005 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5006 BFD_ASSERT (sgot != NULL);
5007
5008 /* Get the offset into the .got.plt table of the entry that
5009 corresponds to this function. */
5010 got_offset = eh->plt_got_offset;
5011
5012 /* Get the index in the procedure linkage table which
5013 corresponds to this symbol. This is the index of this symbol
5014 in all the symbols for which we are making plt entries. The
5015 first three entries in .got.plt are reserved; after that
5016 symbols appear in the same order as in .plt. */
5017 plt_index = (got_offset - 12) / 4;
5018
5019 /* Calculate the displacement between the PLT slot and the
5020 entry in the GOT. The eight-byte offset accounts for the
5021 value produced by adding to pc in the first instruction
5022 of the PLT stub. */
5023 got_displacement = (sgot->output_section->vma
5024 + sgot->output_offset
5025 + got_offset
5026 - splt->output_section->vma
5027 - splt->output_offset
5028 - h->plt.offset
5029 - 8);
5030
5031 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
5032
5033 if (eh->plt_thumb_refcount > 0)
5034 {
5035 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
5036 splt->contents + h->plt.offset - 4);
5037 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
5038 splt->contents + h->plt.offset - 2);
5039 }
5040
5041 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
5042 splt->contents + h->plt.offset + 0);
5043 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
5044 splt->contents + h->plt.offset + 4);
5045 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
5046 splt->contents + h->plt.offset + 8);
5047 #ifdef FOUR_WORD_PLT
5048 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
5049 splt->contents + h->plt.offset + 12);
5050 #endif
5051
5052 /* Fill in the entry in the global offset table. */
5053 bfd_put_32 (output_bfd,
5054 (splt->output_section->vma
5055 + splt->output_offset),
5056 sgot->contents + got_offset);
5057
5058 /* Fill in the entry in the .rel.plt section. */
5059 rel.r_offset = (sgot->output_section->vma
5060 + sgot->output_offset
5061 + got_offset);
5062 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
5063 }
5064
5065 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
5066 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5067
5068 if (!h->def_regular)
5069 {
5070 /* Mark the symbol as undefined, rather than as defined in
5071 the .plt section. Leave the value alone. */
5072 sym->st_shndx = SHN_UNDEF;
5073 /* If the symbol is weak, we do need to clear the value.
5074 Otherwise, the PLT entry would provide a definition for
5075 the symbol even if the symbol wasn't defined anywhere,
5076 and so the symbol would never be NULL. */
5077 if (!h->ref_regular_nonweak)
5078 sym->st_value = 0;
5079 }
5080 }
5081
5082 if (h->got.offset != (bfd_vma) -1)
5083 {
5084 asection * sgot;
5085 asection * srel;
5086 Elf_Internal_Rela rel;
5087 bfd_byte *loc;
5088
5089 /* This symbol has an entry in the global offset table. Set it
5090 up. */
5091 sgot = bfd_get_section_by_name (dynobj, ".got");
5092 srel = bfd_get_section_by_name (dynobj, ".rel.got");
5093 BFD_ASSERT (sgot != NULL && srel != NULL);
5094
5095 rel.r_offset = (sgot->output_section->vma
5096 + sgot->output_offset
5097 + (h->got.offset &~ (bfd_vma) 1));
5098
5099 /* If this is a static link, or it is a -Bsymbolic link and the
5100 symbol is defined locally or was forced to be local because
5101 of a version file, we just want to emit a RELATIVE reloc.
5102 The entry in the global offset table will already have been
5103 initialized in the relocate_section function. */
5104 if (info->shared
5105 && SYMBOL_REFERENCES_LOCAL (info, h))
5106 {
5107 BFD_ASSERT((h->got.offset & 1) != 0);
5108 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5109 }
5110 else
5111 {
5112 BFD_ASSERT((h->got.offset & 1) == 0);
5113 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5114 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5115 }
5116
5117 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5118 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5119 }
5120
5121 if (h->needs_copy)
5122 {
5123 asection * s;
5124 Elf_Internal_Rela rel;
5125 bfd_byte *loc;
5126
5127 /* This symbol needs a copy reloc. Set it up. */
5128 BFD_ASSERT (h->dynindx != -1
5129 && (h->root.type == bfd_link_hash_defined
5130 || h->root.type == bfd_link_hash_defweak));
5131
5132 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5133 ".rel.bss");
5134 BFD_ASSERT (s != NULL);
5135
5136 rel.r_offset = (h->root.u.def.value
5137 + h->root.u.def.section->output_section->vma
5138 + h->root.u.def.section->output_offset);
5139 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
5140 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5141 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5142 }
5143
5144 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5145 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5146 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5147 sym->st_shndx = SHN_ABS;
5148
5149 return TRUE;
5150 }
5151
5152 /* Finish up the dynamic sections. */
5153
5154 static bfd_boolean
5155 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
5156 {
5157 bfd * dynobj;
5158 asection * sgot;
5159 asection * sdyn;
5160
5161 dynobj = elf_hash_table (info)->dynobj;
5162
5163 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5164 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
5165 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5166
5167 if (elf_hash_table (info)->dynamic_sections_created)
5168 {
5169 asection *splt;
5170 Elf32_External_Dyn *dyncon, *dynconend;
5171 struct elf32_arm_link_hash_table *htab;
5172
5173 htab = elf32_arm_hash_table (info);
5174 splt = bfd_get_section_by_name (dynobj, ".plt");
5175 BFD_ASSERT (splt != NULL && sdyn != NULL);
5176
5177 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5178 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5179
5180 for (; dyncon < dynconend; dyncon++)
5181 {
5182 Elf_Internal_Dyn dyn;
5183 const char * name;
5184 asection * s;
5185
5186 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5187
5188 switch (dyn.d_tag)
5189 {
5190 unsigned int type;
5191
5192 default:
5193 break;
5194
5195 case DT_HASH:
5196 name = ".hash";
5197 goto get_vma_if_bpabi;
5198 case DT_STRTAB:
5199 name = ".dynstr";
5200 goto get_vma_if_bpabi;
5201 case DT_SYMTAB:
5202 name = ".dynsym";
5203 goto get_vma_if_bpabi;
5204 case DT_VERSYM:
5205 name = ".gnu.version";
5206 goto get_vma_if_bpabi;
5207 case DT_VERDEF:
5208 name = ".gnu.version_d";
5209 goto get_vma_if_bpabi;
5210 case DT_VERNEED:
5211 name = ".gnu.version_r";
5212 goto get_vma_if_bpabi;
5213
5214 case DT_PLTGOT:
5215 name = ".got";
5216 goto get_vma;
5217 case DT_JMPREL:
5218 name = ".rel.plt";
5219 get_vma:
5220 s = bfd_get_section_by_name (output_bfd, name);
5221 BFD_ASSERT (s != NULL);
5222 if (!htab->symbian_p)
5223 dyn.d_un.d_ptr = s->vma;
5224 else
5225 /* In the BPABI, tags in the PT_DYNAMIC section point
5226 at the file offset, not the memory address, for the
5227 convenience of the post linker. */
5228 dyn.d_un.d_ptr = s->filepos;
5229 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5230 break;
5231
5232 get_vma_if_bpabi:
5233 if (htab->symbian_p)
5234 goto get_vma;
5235 break;
5236
5237 case DT_PLTRELSZ:
5238 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5239 BFD_ASSERT (s != NULL);
5240 dyn.d_un.d_val = s->size;
5241 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5242 break;
5243
5244 case DT_RELSZ:
5245 if (!htab->symbian_p)
5246 {
5247 /* My reading of the SVR4 ABI indicates that the
5248 procedure linkage table relocs (DT_JMPREL) should be
5249 included in the overall relocs (DT_REL). This is
5250 what Solaris does. However, UnixWare can not handle
5251 that case. Therefore, we override the DT_RELSZ entry
5252 here to make it not include the JMPREL relocs. Since
5253 the linker script arranges for .rel.plt to follow all
5254 other relocation sections, we don't have to worry
5255 about changing the DT_REL entry. */
5256 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5257 if (s != NULL)
5258 dyn.d_un.d_val -= s->size;
5259 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5260 break;
5261 }
5262 /* Fall through */
5263
5264 case DT_REL:
5265 case DT_RELA:
5266 case DT_RELASZ:
5267 /* In the BPABI, the DT_REL tag must point at the file
5268 offset, not the VMA, of the first relocation
5269 section. So, we use code similar to that in
5270 elflink.c, but do not check for SHF_ALLOC on the
5271 relcoation section, since relocations sections are
5272 never allocated under the BPABI. The comments above
5273 about Unixware notwithstanding, we include all of the
5274 relocations here. */
5275 if (htab->symbian_p)
5276 {
5277 unsigned int i;
5278 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5279 ? SHT_REL : SHT_RELA);
5280 dyn.d_un.d_val = 0;
5281 for (i = 1; i < elf_numsections (output_bfd); i++)
5282 {
5283 Elf_Internal_Shdr *hdr
5284 = elf_elfsections (output_bfd)[i];
5285 if (hdr->sh_type == type)
5286 {
5287 if (dyn.d_tag == DT_RELSZ
5288 || dyn.d_tag == DT_RELASZ)
5289 dyn.d_un.d_val += hdr->sh_size;
5290 else if ((ufile_ptr) hdr->sh_offset
5291 <= dyn.d_un.d_val - 1)
5292 dyn.d_un.d_val = hdr->sh_offset;
5293 }
5294 }
5295 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5296 }
5297 break;
5298
5299 /* Set the bottom bit of DT_INIT/FINI if the
5300 corresponding function is Thumb. */
5301 case DT_INIT:
5302 name = info->init_function;
5303 goto get_sym;
5304 case DT_FINI:
5305 name = info->fini_function;
5306 get_sym:
5307 /* If it wasn't set by elf_bfd_final_link
5308 then there is nothing to adjust. */
5309 if (dyn.d_un.d_val != 0)
5310 {
5311 struct elf_link_hash_entry * eh;
5312
5313 eh = elf_link_hash_lookup (elf_hash_table (info), name,
5314 FALSE, FALSE, TRUE);
5315 if (eh != (struct elf_link_hash_entry *) NULL
5316 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5317 {
5318 dyn.d_un.d_val |= 1;
5319 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5320 }
5321 }
5322 break;
5323 }
5324 }
5325
5326 /* Fill in the first entry in the procedure linkage table. */
5327 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
5328 {
5329 bfd_vma got_displacement;
5330
5331 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5332 got_displacement = (sgot->output_section->vma
5333 + sgot->output_offset
5334 - splt->output_section->vma
5335 - splt->output_offset
5336 - 16);
5337
5338 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5339 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5340 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5341 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5342 #ifdef FOUR_WORD_PLT
5343 /* The displacement value goes in the otherwise-unused last word of
5344 the second entry. */
5345 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5346 #else
5347 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5348 #endif
5349 }
5350
5351 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5352 really seem like the right value. */
5353 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5354 }
5355
5356 /* Fill in the first three entries in the global offset table. */
5357 if (sgot)
5358 {
5359 if (sgot->size > 0)
5360 {
5361 if (sdyn == NULL)
5362 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5363 else
5364 bfd_put_32 (output_bfd,
5365 sdyn->output_section->vma + sdyn->output_offset,
5366 sgot->contents);
5367 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5368 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5369 }
5370
5371 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5372 }
5373
5374 return TRUE;
5375 }
5376
5377 static void
5378 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
5379 {
5380 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5381 struct elf32_arm_link_hash_table *globals;
5382
5383 i_ehdrp = elf_elfheader (abfd);
5384
5385 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
5386 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
5387 else
5388 i_ehdrp->e_ident[EI_OSABI] = 0;
5389 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
5390
5391 if (link_info)
5392 {
5393 globals = elf32_arm_hash_table (link_info);
5394 if (globals->byteswap_code)
5395 i_ehdrp->e_flags |= EF_ARM_BE8;
5396 }
5397 }
5398
5399 static enum elf_reloc_type_class
5400 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
5401 {
5402 switch ((int) ELF32_R_TYPE (rela->r_info))
5403 {
5404 case R_ARM_RELATIVE:
5405 return reloc_class_relative;
5406 case R_ARM_JUMP_SLOT:
5407 return reloc_class_plt;
5408 case R_ARM_COPY:
5409 return reloc_class_copy;
5410 default:
5411 return reloc_class_normal;
5412 }
5413 }
5414
5415 /* Set the right machine number for an Arm ELF file. */
5416
5417 static bfd_boolean
5418 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
5419 {
5420 if (hdr->sh_type == SHT_NOTE)
5421 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
5422
5423 return TRUE;
5424 }
5425
5426 static void
5427 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
5428 {
5429 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
5430 }
5431
5432 /* Return TRUE if this is an unwinding table entry. */
5433
5434 static bfd_boolean
5435 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
5436 {
5437 size_t len1, len2;
5438
5439 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
5440 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
5441 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
5442 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
5443 }
5444
5445
5446 /* Set the type and flags for an ARM section. We do this by
5447 the section name, which is a hack, but ought to work. */
5448
5449 static bfd_boolean
5450 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
5451 {
5452 const char * name;
5453
5454 name = bfd_get_section_name (abfd, sec);
5455
5456 if (is_arm_elf_unwind_section_name (abfd, name))
5457 {
5458 hdr->sh_type = SHT_ARM_EXIDX;
5459 hdr->sh_flags |= SHF_LINK_ORDER;
5460 }
5461 return TRUE;
5462 }
5463
5464 /* Handle an ARM specific section when reading an object file.
5465 This is called when elf.c finds a section with an unknown type. */
5466
5467 static bfd_boolean
5468 elf32_arm_section_from_shdr (bfd *abfd,
5469 Elf_Internal_Shdr * hdr,
5470 const char *name)
5471 {
5472 /* There ought to be a place to keep ELF backend specific flags, but
5473 at the moment there isn't one. We just keep track of the
5474 sections by their name, instead. Fortunately, the ABI gives
5475 names for all the ARM specific sections, so we will probably get
5476 away with this. */
5477 switch (hdr->sh_type)
5478 {
5479 case SHT_ARM_EXIDX:
5480 break;
5481
5482 default:
5483 return FALSE;
5484 }
5485
5486 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
5487 return FALSE;
5488
5489 return TRUE;
5490 }
5491
5492 /* Called for each symbol. Builds a section map based on mapping symbols.
5493 Does not alter any of the symbols. */
5494
5495 static bfd_boolean
5496 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
5497 const char *name,
5498 Elf_Internal_Sym *elfsym,
5499 asection *input_sec,
5500 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
5501 {
5502 int mapcount;
5503 elf32_arm_section_map *map;
5504 struct elf32_arm_link_hash_table *globals;
5505
5506 /* Only do this on final link. */
5507 if (info->relocatable)
5508 return TRUE;
5509
5510 /* Only build a map if we need to byteswap code. */
5511 globals = elf32_arm_hash_table (info);
5512 if (!globals->byteswap_code)
5513 return TRUE;
5514
5515 /* We only want mapping symbols. */
5516 if (! is_arm_mapping_symbol_name (name))
5517 return TRUE;
5518
5519 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
5520 map = elf32_arm_section_data (input_sec)->map;
5521 /* TODO: This may be inefficient, but we probably don't usually have many
5522 mapping symbols per section. */
5523 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
5524 elf32_arm_section_data (input_sec)->map = map;
5525
5526 map[mapcount - 1].vma = elfsym->st_value;
5527 map[mapcount - 1].type = name[1];
5528 return TRUE;
5529 }
5530
5531
5532 /* Allocate target specific section data. */
5533
5534 static bfd_boolean
5535 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
5536 {
5537 struct _arm_elf_section_data *sdata;
5538 bfd_size_type amt = sizeof (*sdata);
5539
5540 sdata = bfd_zalloc (abfd, amt);
5541 if (sdata == NULL)
5542 return FALSE;
5543 sec->used_by_bfd = sdata;
5544
5545 return _bfd_elf_new_section_hook (abfd, sec);
5546 }
5547
5548
5549 /* Used to order a list of mapping symbols by address. */
5550
5551 static int
5552 elf32_arm_compare_mapping (const void * a, const void * b)
5553 {
5554 return ((const elf32_arm_section_map *) a)->vma
5555 > ((const elf32_arm_section_map *) b)->vma;
5556 }
5557
5558
5559 /* Do code byteswapping. Return FALSE afterwards so that the section is
5560 written out as normal. */
5561
5562 static bfd_boolean
5563 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
5564 bfd_byte *contents)
5565 {
5566 int mapcount;
5567 elf32_arm_section_map *map;
5568 bfd_vma ptr;
5569 bfd_vma end;
5570 bfd_vma offset;
5571 bfd_byte tmp;
5572 int i;
5573
5574 mapcount = elf32_arm_section_data (sec)->mapcount;
5575 map = elf32_arm_section_data (sec)->map;
5576
5577 if (mapcount == 0)
5578 return FALSE;
5579
5580 qsort (map, mapcount, sizeof (elf32_arm_section_map),
5581 elf32_arm_compare_mapping);
5582
5583 offset = sec->output_section->vma + sec->output_offset;
5584 ptr = map[0].vma - offset;
5585 for (i = 0; i < mapcount; i++)
5586 {
5587 if (i == mapcount - 1)
5588 end = sec->size;
5589 else
5590 end = map[i + 1].vma - offset;
5591
5592 switch (map[i].type)
5593 {
5594 case 'a':
5595 /* Byte swap code words. */
5596 while (ptr + 3 < end)
5597 {
5598 tmp = contents[ptr];
5599 contents[ptr] = contents[ptr + 3];
5600 contents[ptr + 3] = tmp;
5601 tmp = contents[ptr + 1];
5602 contents[ptr + 1] = contents[ptr + 2];
5603 contents[ptr + 2] = tmp;
5604 ptr += 4;
5605 }
5606 break;
5607
5608 case 't':
5609 /* Byte swap code halfwords. */
5610 while (ptr + 1 < end)
5611 {
5612 tmp = contents[ptr];
5613 contents[ptr] = contents[ptr + 1];
5614 contents[ptr + 1] = tmp;
5615 ptr += 2;
5616 }
5617 break;
5618
5619 case 'd':
5620 /* Leave data alone. */
5621 break;
5622 }
5623 ptr = end;
5624 }
5625 free (map);
5626 return FALSE;
5627 }
5628
5629 /* Display STT_ARM_TFUNC symbols as functions. */
5630
5631 static void
5632 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5633 asymbol *asym)
5634 {
5635 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5636
5637 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
5638 elfsym->symbol.flags |= BSF_FUNCTION;
5639 }
5640
5641
5642 /* Mangle thumb function symbols as we read them in. */
5643
5644 static void
5645 elf32_arm_swap_symbol_in (bfd * abfd,
5646 const void *psrc,
5647 const void *pshn,
5648 Elf_Internal_Sym *dst)
5649 {
5650 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
5651
5652 /* New EABI objects mark thumb function symbols by setting the low bit of
5653 the address. Turn these into STT_ARM_TFUNC. */
5654 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
5655 && (dst->st_value & 1))
5656 {
5657 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
5658 dst->st_value &= ~(bfd_vma) 1;
5659 }
5660 }
5661
5662
5663 /* Mangle thumb function symbols as we write them out. */
5664
5665 static void
5666 elf32_arm_swap_symbol_out (bfd *abfd,
5667 const Elf_Internal_Sym *src,
5668 void *cdst,
5669 void *shndx)
5670 {
5671 Elf_Internal_Sym newsym;
5672
5673 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
5674 of the address set, as per the new EABI. We do this unconditionally
5675 because objcopy does not set the elf header flags until after
5676 it writes out the symbol table. */
5677 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
5678 {
5679 newsym = *src;
5680 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
5681 newsym.st_value |= 1;
5682
5683 src = &newsym;
5684 }
5685 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
5686 }
5687
5688 /* We use this to override swap_symbol_in and swap_symbol_out. */
5689 const struct elf_size_info elf32_arm_size_info = {
5690 sizeof (Elf32_External_Ehdr),
5691 sizeof (Elf32_External_Phdr),
5692 sizeof (Elf32_External_Shdr),
5693 sizeof (Elf32_External_Rel),
5694 sizeof (Elf32_External_Rela),
5695 sizeof (Elf32_External_Sym),
5696 sizeof (Elf32_External_Dyn),
5697 sizeof (Elf_External_Note),
5698 4,
5699 1,
5700 32, 2,
5701 ELFCLASS32, EV_CURRENT,
5702 bfd_elf32_write_out_phdrs,
5703 bfd_elf32_write_shdrs_and_ehdr,
5704 bfd_elf32_write_relocs,
5705 elf32_arm_swap_symbol_in,
5706 elf32_arm_swap_symbol_out,
5707 bfd_elf32_slurp_reloc_table,
5708 bfd_elf32_slurp_symbol_table,
5709 bfd_elf32_swap_dyn_in,
5710 bfd_elf32_swap_dyn_out,
5711 bfd_elf32_swap_reloc_in,
5712 bfd_elf32_swap_reloc_out,
5713 bfd_elf32_swap_reloca_in,
5714 bfd_elf32_swap_reloca_out
5715 };
5716
5717 #define ELF_ARCH bfd_arch_arm
5718 #define ELF_MACHINE_CODE EM_ARM
5719 #ifdef __QNXTARGET__
5720 #define ELF_MAXPAGESIZE 0x1000
5721 #else
5722 #define ELF_MAXPAGESIZE 0x8000
5723 #endif
5724 #define ELF_MINPAGESIZE 0x1000
5725
5726 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
5727 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
5728 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
5729 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
5730 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
5731 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
5732 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
5733 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
5734 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
5735
5736 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
5737 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
5738 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
5739 #define elf_backend_check_relocs elf32_arm_check_relocs
5740 #define elf_backend_relocate_section elf32_arm_relocate_section
5741 #define elf_backend_write_section elf32_arm_write_section
5742 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
5743 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
5744 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
5745 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
5746 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
5747 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
5748 #define elf_backend_post_process_headers elf32_arm_post_process_headers
5749 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
5750 #define elf_backend_object_p elf32_arm_object_p
5751 #define elf_backend_section_flags elf32_arm_section_flags
5752 #define elf_backend_fake_sections elf32_arm_fake_sections
5753 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
5754 #define elf_backend_final_write_processing elf32_arm_final_write_processing
5755 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
5756 #define elf_backend_symbol_processing elf32_arm_symbol_processing
5757 #define elf_backend_size_info elf32_arm_size_info
5758
5759 #define elf_backend_can_refcount 1
5760 #define elf_backend_can_gc_sections 1
5761 #define elf_backend_plt_readonly 1
5762 #define elf_backend_want_got_plt 1
5763 #define elf_backend_want_plt_sym 0
5764 #define elf_backend_may_use_rel_p 1
5765 #define elf_backend_may_use_rela_p 0
5766 #define elf_backend_default_use_rela_p 0
5767 #define elf_backend_rela_normal 0
5768
5769 #define elf_backend_got_header_size 12
5770
5771 #include "elf32-target.h"
5772
5773 /* VxWorks Targets */
5774
5775 #undef TARGET_LITTLE_SYM
5776 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
5777 #undef TARGET_LITTLE_NAME
5778 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
5779 #undef TARGET_BIG_SYM
5780 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
5781 #undef TARGET_BIG_NAME
5782 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
5783
5784 /* Like elf32_arm_link_hash_table_create -- but overrides
5785 appropriately for VxWorks. */
5786 static struct bfd_link_hash_table *
5787 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
5788 {
5789 struct bfd_link_hash_table *ret;
5790
5791 ret = elf32_arm_link_hash_table_create (abfd);
5792 if (ret)
5793 {
5794 struct elf32_arm_link_hash_table *htab
5795 = (struct elf32_arm_link_hash_table *)ret;
5796 htab->use_rel = 0;
5797 }
5798 return ret;
5799 }
5800
5801 #undef elf32_bed
5802 #define elf32_bed elf32_arm_vxworks_bed
5803
5804 #undef bfd_elf32_bfd_link_hash_table_create
5805 #define bfd_elf32_bfd_link_hash_table_create \
5806 elf32_arm_vxworks_link_hash_table_create
5807
5808 #undef elf_backend_may_use_rel_p
5809 #define elf_backend_may_use_rel_p 0
5810 #undef elf_backend_may_use_rela_p
5811 #define elf_backend_may_use_rela_p 1
5812 #undef elf_backend_default_use_rela_p
5813 #define elf_backend_default_use_rela_p 1
5814 #undef elf_backend_rela_normal
5815 #define elf_backend_rela_normal 1
5816
5817 #include "elf32-target.h"
5818
5819
5820 /* Symbian OS Targets */
5821
5822 #undef TARGET_LITTLE_SYM
5823 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
5824 #undef TARGET_LITTLE_NAME
5825 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
5826 #undef TARGET_BIG_SYM
5827 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
5828 #undef TARGET_BIG_NAME
5829 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
5830
5831 /* Like elf32_arm_link_hash_table_create -- but overrides
5832 appropriately for Symbian OS. */
5833 static struct bfd_link_hash_table *
5834 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
5835 {
5836 struct bfd_link_hash_table *ret;
5837
5838 ret = elf32_arm_link_hash_table_create (abfd);
5839 if (ret)
5840 {
5841 struct elf32_arm_link_hash_table *htab
5842 = (struct elf32_arm_link_hash_table *)ret;
5843 /* There is no PLT header for Symbian OS. */
5844 htab->plt_header_size = 0;
5845 /* The PLT entries are each three instructions. */
5846 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
5847 htab->symbian_p = 1;
5848 }
5849 return ret;
5850 }
5851
5852 static struct bfd_elf_special_section const
5853 elf32_arm_symbian_special_sections[]=
5854 {
5855 /* In a BPABI executable, the dynamic linking sections do not go in
5856 the loadable read-only segment. The post-linker may wish to
5857 refer to these sections, but they are not part of the final
5858 program image. */
5859 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
5860 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
5861 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
5862 { ".got", 4, 0, SHT_PROGBITS, 0 },
5863 { ".hash", 5, 0, SHT_HASH, 0 },
5864 /* These sections do not need to be writable as the SymbianOS
5865 postlinker will arrange things so that no dynamic relocation is
5866 required. */
5867 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
5868 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
5869 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
5870 { NULL, 0, 0, 0, 0 }
5871 };
5872
5873 static void
5874 elf32_arm_symbian_begin_write_processing (bfd *abfd,
5875 struct bfd_link_info *link_info
5876 ATTRIBUTE_UNUSED)
5877 {
5878 /* BPABI objects are never loaded directly by an OS kernel; they are
5879 processed by a postlinker first, into an OS-specific format. If
5880 the D_PAGED bit is set on the file, BFD will align segments on
5881 page boundaries, so that an OS can directly map the file. With
5882 BPABI objects, that just results in wasted space. In addition,
5883 because we clear the D_PAGED bit, map_sections_to_segments will
5884 recognize that the program headers should not be mapped into any
5885 loadable segment. */
5886 abfd->flags &= ~D_PAGED;
5887 }
5888
5889 static bfd_boolean
5890 elf32_arm_symbian_modify_segment_map (bfd *abfd,
5891 struct bfd_link_info *info
5892 ATTRIBUTE_UNUSED)
5893 {
5894 struct elf_segment_map *m;
5895 asection *dynsec;
5896
5897 /* BPABI shared libraries and executables should have a PT_DYNAMIC
5898 segment. However, because the .dynamic section is not marked
5899 with SEC_LOAD, the generic ELF code will not create such a
5900 segment. */
5901 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
5902 if (dynsec)
5903 {
5904 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
5905 m->next = elf_tdata (abfd)->segment_map;
5906 elf_tdata (abfd)->segment_map = m;
5907 }
5908
5909 return TRUE;
5910 }
5911
5912 #undef elf32_bed
5913 #define elf32_bed elf32_arm_symbian_bed
5914
5915 /* The dynamic sections are not allocated on SymbianOS; the postlinker
5916 will process them and then discard them. */
5917 #undef ELF_DYNAMIC_SEC_FLAGS
5918 #define ELF_DYNAMIC_SEC_FLAGS \
5919 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
5920
5921 #undef bfd_elf32_bfd_link_hash_table_create
5922 #define bfd_elf32_bfd_link_hash_table_create \
5923 elf32_arm_symbian_link_hash_table_create
5924
5925 #undef elf_backend_special_sections
5926 #define elf_backend_special_sections elf32_arm_symbian_special_sections
5927
5928 #undef elf_backend_begin_write_processing
5929 #define elf_backend_begin_write_processing \
5930 elf32_arm_symbian_begin_write_processing
5931
5932 #undef elf_backend_modify_segment_map
5933 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
5934
5935 /* There is no .got section for BPABI objects, and hence no header. */
5936 #undef elf_backend_got_header_size
5937 #define elf_backend_got_header_size 0
5938
5939 /* Similarly, there is no .got.plt section. */
5940 #undef elf_backend_want_got_plt
5941 #define elf_backend_want_got_plt 0
5942
5943 #undef elf_backend_may_use_rel_p
5944 #define elf_backend_may_use_rel_p 1
5945 #undef elf_backend_may_use_rela_p
5946 #define elf_backend_may_use_rela_p 0
5947 #undef elf_backend_default_use_rela_p
5948 #define elf_backend_default_use_rela_p 0
5949 #undef elf_backend_rela_normal
5950 #define elf_backend_rela_normal 0
5951
5952 #include "elf32-target.h"
GDB Binutils - Deliverables
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