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2005-04-21 H.J. Lu <hongjiu.lu@intel.com>
[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 /* Dynamic TLS relocations. */
298
299 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 32, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield,/* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_ARM_TLS_DTPMOD32", /* name */
308 TRUE, /* partial_inplace */
309 0xffffffff, /* src_mask */
310 0xffffffff, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 32, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield,/* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_ARM_TLS_DTPOFF32", /* name */
322 TRUE, /* partial_inplace */
323 0xffffffff, /* src_mask */
324 0xffffffff, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 HOWTO (R_ARM_TLS_TPOFF32, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 32, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield,/* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 "R_ARM_TLS_TPOFF32", /* name */
336 TRUE, /* partial_inplace */
337 0xffffffff, /* src_mask */
338 0xffffffff, /* 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 static reloc_howto_type elf32_arm_tls_gd32_howto =
667 HOWTO (R_ARM_TLS_GD32, /* type */
668 0, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 32, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield,/* complain_on_overflow */
674 NULL, /* special_function */
675 "R_ARM_TLS_GD32", /* name */
676 TRUE, /* partial_inplace */
677 0xffffffff, /* src_mask */
678 0xffffffff, /* dst_mask */
679 FALSE); /* pcrel_offset */
680
681 static reloc_howto_type elf32_arm_tls_ldo32_howto =
682 HOWTO (R_ARM_TLS_LDO32, /* type */
683 0, /* rightshift */
684 2, /* size (0 = byte, 1 = short, 2 = long) */
685 32, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_bitfield,/* complain_on_overflow */
689 bfd_elf_generic_reloc, /* special_function */
690 "R_ARM_TLS_LDO32", /* name */
691 TRUE, /* partial_inplace */
692 0xffffffff, /* src_mask */
693 0xffffffff, /* dst_mask */
694 FALSE); /* pcrel_offset */
695
696 static reloc_howto_type elf32_arm_tls_ldm32_howto =
697 HOWTO (R_ARM_TLS_LDM32, /* type */
698 0, /* rightshift */
699 2, /* size (0 = byte, 1 = short, 2 = long) */
700 32, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield,/* complain_on_overflow */
704 bfd_elf_generic_reloc, /* special_function */
705 "R_ARM_TLS_LDM32", /* name */
706 TRUE, /* partial_inplace */
707 0xffffffff, /* src_mask */
708 0xffffffff, /* dst_mask */
709 FALSE); /* pcrel_offset */
710
711 static reloc_howto_type elf32_arm_tls_le32_howto =
712 HOWTO (R_ARM_TLS_LE32, /* type */
713 0, /* rightshift */
714 2, /* size (0 = byte, 1 = short, 2 = long) */
715 32, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_bitfield,/* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_ARM_TLS_LE32", /* name */
721 TRUE, /* partial_inplace */
722 0xffffffff, /* src_mask */
723 0xffffffff, /* dst_mask */
724 FALSE); /* pcrel_offset */
725
726 static reloc_howto_type elf32_arm_tls_ie32_howto =
727 HOWTO (R_ARM_TLS_IE32, /* type */
728 0, /* rightshift */
729 2, /* size (0 = byte, 1 = short, 2 = long) */
730 32, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield,/* complain_on_overflow */
734 NULL, /* special_function */
735 "R_ARM_TLS_IE32", /* name */
736 TRUE, /* partial_inplace */
737 0xffffffff, /* src_mask */
738 0xffffffff, /* dst_mask */
739 FALSE); /* pcrel_offset */
740
741 /* GNU extension to record C++ vtable hierarchy */
742 static reloc_howto_type elf32_arm_vtinherit_howto =
743 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
744 0, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 0, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 NULL, /* special_function */
751 "R_ARM_GNU_VTINHERIT", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0, /* dst_mask */
755 FALSE); /* pcrel_offset */
756
757 /* GNU extension to record C++ vtable member usage */
758 static reloc_howto_type elf32_arm_vtentry_howto =
759 HOWTO (R_ARM_GNU_VTENTRY, /* type */
760 0, /* rightshift */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
762 0, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
767 "R_ARM_GNU_VTENTRY", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0, /* dst_mask */
771 FALSE); /* pcrel_offset */
772
773 /* 12 bit pc relative */
774 static reloc_howto_type elf32_arm_thm_pc11_howto =
775 HOWTO (R_ARM_THM_PC11, /* type */
776 1, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 11, /* bitsize */
779 TRUE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_signed, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_ARM_THM_PC11", /* name */
784 FALSE, /* partial_inplace */
785 0x000007ff, /* src_mask */
786 0x000007ff, /* dst_mask */
787 TRUE); /* pcrel_offset */
788
789 /* 12 bit pc relative */
790 static reloc_howto_type elf32_arm_thm_pc9_howto =
791 HOWTO (R_ARM_THM_PC9, /* type */
792 1, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 8, /* bitsize */
795 TRUE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_ARM_THM_PC9", /* name */
800 FALSE, /* partial_inplace */
801 0x000000ff, /* src_mask */
802 0x000000ff, /* dst_mask */
803 TRUE); /* pcrel_offset */
804
805 /* Place relative GOT-indirect. */
806 static reloc_howto_type elf32_arm_got_prel =
807 HOWTO (R_ARM_GOT_PREL, /* type */
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 32, /* bitsize */
811 TRUE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_ARM_GOT_PREL", /* name */
816 FALSE, /* partial_inplace */
817 0xffffffff, /* src_mask */
818 0xffffffff, /* dst_mask */
819 TRUE); /* pcrel_offset */
820
821 /* Currently unused relocations. */
822 static reloc_howto_type elf32_arm_r_howto[4] =
823 {
824 HOWTO (R_ARM_RREL32, /* type */
825 0, /* rightshift */
826 0, /* size (0 = byte, 1 = short, 2 = long) */
827 0, /* bitsize */
828 FALSE, /* pc_relative */
829 0, /* bitpos */
830 complain_overflow_dont,/* complain_on_overflow */
831 bfd_elf_generic_reloc, /* special_function */
832 "R_ARM_RREL32", /* name */
833 FALSE, /* partial_inplace */
834 0, /* src_mask */
835 0, /* dst_mask */
836 FALSE), /* pcrel_offset */
837
838 HOWTO (R_ARM_RABS32, /* type */
839 0, /* rightshift */
840 0, /* size (0 = byte, 1 = short, 2 = long) */
841 0, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont,/* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_ARM_RABS32", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 HOWTO (R_ARM_RPC24, /* type */
853 0, /* rightshift */
854 0, /* size (0 = byte, 1 = short, 2 = long) */
855 0, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont,/* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_ARM_RPC24", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 0, /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 HOWTO (R_ARM_RBASE, /* type */
867 0, /* rightshift */
868 0, /* size (0 = byte, 1 = short, 2 = long) */
869 0, /* bitsize */
870 FALSE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont,/* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_ARM_RBASE", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 0, /* dst_mask */
878 FALSE) /* pcrel_offset */
879 };
880
881 static reloc_howto_type *
882 elf32_arm_howto_from_type (unsigned int r_type)
883 {
884 if (r_type < NUM_ELEM (elf32_arm_howto_table))
885 return &elf32_arm_howto_table[r_type];
886
887 switch (r_type)
888 {
889 case R_ARM_GOT_PREL:
890 return &elf32_arm_got_prel;
891
892 case R_ARM_GNU_VTINHERIT:
893 return &elf32_arm_vtinherit_howto;
894
895 case R_ARM_GNU_VTENTRY:
896 return &elf32_arm_vtentry_howto;
897
898 case R_ARM_THM_PC11:
899 return &elf32_arm_thm_pc11_howto;
900
901 case R_ARM_THM_PC9:
902 return &elf32_arm_thm_pc9_howto;
903
904 case R_ARM_TLS_GD32:
905 return &elf32_arm_tls_gd32_howto;
906 break;
907
908 case R_ARM_TLS_LDO32:
909 return &elf32_arm_tls_ldo32_howto;
910 break;
911
912 case R_ARM_TLS_LDM32:
913 return &elf32_arm_tls_ldm32_howto;
914 break;
915
916 case R_ARM_TLS_IE32:
917 return &elf32_arm_tls_ie32_howto;
918 break;
919
920 case R_ARM_TLS_LE32:
921 return &elf32_arm_tls_le32_howto;
922 break;
923
924 case R_ARM_RREL32:
925 case R_ARM_RABS32:
926 case R_ARM_RPC24:
927 case R_ARM_RBASE:
928 return &elf32_arm_r_howto[r_type - R_ARM_RREL32];
929
930 default:
931 return NULL;
932 }
933 }
934
935 static void
936 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
937 Elf_Internal_Rela * elf_reloc)
938 {
939 unsigned int r_type;
940
941 r_type = ELF32_R_TYPE (elf_reloc->r_info);
942 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
943 }
944
945 struct elf32_arm_reloc_map
946 {
947 bfd_reloc_code_real_type bfd_reloc_val;
948 unsigned char elf_reloc_val;
949 };
950
951 /* All entries in this list must also be present in elf32_arm_howto_table. */
952 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
953 {
954 {BFD_RELOC_NONE, R_ARM_NONE},
955 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
956 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
957 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
958 {BFD_RELOC_32, R_ARM_ABS32},
959 {BFD_RELOC_32_PCREL, R_ARM_REL32},
960 {BFD_RELOC_8, R_ARM_ABS8},
961 {BFD_RELOC_16, R_ARM_ABS16},
962 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
963 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
964 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22},
965 {BFD_RELOC_ARM_COPY, R_ARM_COPY},
966 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
967 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
968 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
969 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF},
970 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
971 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
972 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
973 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
974 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
975 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
976 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
977 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
978 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
979 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
980 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
981 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
982 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
983 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
984 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
985 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
986 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
987 };
988
989 static reloc_howto_type *
990 elf32_arm_reloc_type_lookup (abfd, code)
991 bfd *abfd ATTRIBUTE_UNUSED;
992 bfd_reloc_code_real_type code;
993 {
994 unsigned int i;
995
996 switch (code)
997 {
998 case BFD_RELOC_VTABLE_INHERIT:
999 return & elf32_arm_vtinherit_howto;
1000
1001 case BFD_RELOC_VTABLE_ENTRY:
1002 return & elf32_arm_vtentry_howto;
1003
1004 case BFD_RELOC_THUMB_PCREL_BRANCH12:
1005 return & elf32_arm_thm_pc11_howto;
1006
1007 case BFD_RELOC_THUMB_PCREL_BRANCH9:
1008 return & elf32_arm_thm_pc9_howto;
1009
1010 case BFD_RELOC_ARM_TLS_GD32:
1011 return & elf32_arm_tls_gd32_howto;
1012
1013 case BFD_RELOC_ARM_TLS_LDO32:
1014 return & elf32_arm_tls_ldo32_howto;
1015
1016 case BFD_RELOC_ARM_TLS_LDM32:
1017 return & elf32_arm_tls_ldm32_howto;
1018
1019 case BFD_RELOC_ARM_TLS_IE32:
1020 return & elf32_arm_tls_ie32_howto;
1021
1022 case BFD_RELOC_ARM_TLS_LE32:
1023 return & elf32_arm_tls_le32_howto;
1024
1025 default:
1026 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1027 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1028 return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val];
1029
1030 return NULL;
1031 }
1032 }
1033
1034 /* Support for core dump NOTE sections */
1035 static bfd_boolean
1036 elf32_arm_nabi_grok_prstatus (abfd, note)
1037 bfd *abfd;
1038 Elf_Internal_Note *note;
1039 {
1040 int offset;
1041 size_t size;
1042
1043 switch (note->descsz)
1044 {
1045 default:
1046 return FALSE;
1047
1048 case 148: /* Linux/ARM 32-bit*/
1049 /* pr_cursig */
1050 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1051
1052 /* pr_pid */
1053 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1054
1055 /* pr_reg */
1056 offset = 72;
1057 size = 72;
1058
1059 break;
1060 }
1061
1062 /* Make a ".reg/999" section. */
1063 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1064 size, note->descpos + offset);
1065 }
1066
1067 static bfd_boolean
1068 elf32_arm_nabi_grok_psinfo (abfd, note)
1069 bfd *abfd;
1070 Elf_Internal_Note *note;
1071 {
1072 switch (note->descsz)
1073 {
1074 default:
1075 return FALSE;
1076
1077 case 124: /* Linux/ARM elf_prpsinfo */
1078 elf_tdata (abfd)->core_program
1079 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1080 elf_tdata (abfd)->core_command
1081 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1082 }
1083
1084 /* Note that for some reason, a spurious space is tacked
1085 onto the end of the args in some (at least one anyway)
1086 implementations, so strip it off if it exists. */
1087
1088 {
1089 char *command = elf_tdata (abfd)->core_command;
1090 int n = strlen (command);
1091
1092 if (0 < n && command[n - 1] == ' ')
1093 command[n - 1] = '\0';
1094 }
1095
1096 return TRUE;
1097 }
1098
1099 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1100 #define TARGET_LITTLE_NAME "elf32-littlearm"
1101 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1102 #define TARGET_BIG_NAME "elf32-bigarm"
1103
1104 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1105 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1106
1107 typedef unsigned long int insn32;
1108 typedef unsigned short int insn16;
1109
1110 /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
1111 #define INTERWORK_FLAG(abfd) \
1112 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
1113 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1114
1115 /* The linker script knows the section names for placement.
1116 The entry_names are used to do simple name mangling on the stubs.
1117 Given a function name, and its type, the stub can be found. The
1118 name can be changed. The only requirement is the %s be present. */
1119 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1120 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1121
1122 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1123 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1124
1125 /* The name of the dynamic interpreter. This is put in the .interp
1126 section. */
1127 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1128
1129 #ifdef FOUR_WORD_PLT
1130
1131 /* The first entry in a procedure linkage table looks like
1132 this. It is set up so that any shared library function that is
1133 called before the relocation has been set up calls the dynamic
1134 linker first. */
1135 static const bfd_vma elf32_arm_plt0_entry [] =
1136 {
1137 0xe52de004, /* str lr, [sp, #-4]! */
1138 0xe59fe010, /* ldr lr, [pc, #16] */
1139 0xe08fe00e, /* add lr, pc, lr */
1140 0xe5bef008, /* ldr pc, [lr, #8]! */
1141 };
1142
1143 /* Subsequent entries in a procedure linkage table look like
1144 this. */
1145 static const bfd_vma elf32_arm_plt_entry [] =
1146 {
1147 0xe28fc600, /* add ip, pc, #NN */
1148 0xe28cca00, /* add ip, ip, #NN */
1149 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1150 0x00000000, /* unused */
1151 };
1152
1153 #else
1154
1155 /* The first entry in a procedure linkage table looks like
1156 this. It is set up so that any shared library function that is
1157 called before the relocation has been set up calls the dynamic
1158 linker first. */
1159 static const bfd_vma elf32_arm_plt0_entry [] =
1160 {
1161 0xe52de004, /* str lr, [sp, #-4]! */
1162 0xe59fe004, /* ldr lr, [pc, #4] */
1163 0xe08fe00e, /* add lr, pc, lr */
1164 0xe5bef008, /* ldr pc, [lr, #8]! */
1165 0x00000000, /* &GOT[0] - . */
1166 };
1167
1168 /* Subsequent entries in a procedure linkage table look like
1169 this. */
1170 static const bfd_vma elf32_arm_plt_entry [] =
1171 {
1172 0xe28fc600, /* add ip, pc, #0xNN00000 */
1173 0xe28cca00, /* add ip, ip, #0xNN000 */
1174 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1175 };
1176
1177 #endif
1178
1179 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1180 #define PLT_THUMB_STUB_SIZE 4
1181 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1182 {
1183 0x4778, /* bx pc */
1184 0x46c0 /* nop */
1185 };
1186
1187 /* The entries in a PLT when using a DLL-based target with multiple
1188 address spaces. */
1189 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1190 {
1191 0xe51ff004, /* ldr pc, [pc, #-4] */
1192 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1193 };
1194
1195 /* Used to build a map of a section. This is required for mixed-endian
1196 code/data. */
1197
1198 typedef struct elf32_elf_section_map
1199 {
1200 bfd_vma vma;
1201 char type;
1202 }
1203 elf32_arm_section_map;
1204
1205 struct _arm_elf_section_data
1206 {
1207 struct bfd_elf_section_data elf;
1208 int mapcount;
1209 elf32_arm_section_map *map;
1210 };
1211
1212 #define elf32_arm_section_data(sec) \
1213 ((struct _arm_elf_section_data *) elf_section_data (sec))
1214
1215 /* The size of the thread control block. */
1216 #define TCB_SIZE 8
1217
1218 struct elf32_arm_obj_tdata
1219 {
1220 struct elf_obj_tdata root;
1221
1222 /* tls_type for each local got entry. */
1223 char *local_got_tls_type;
1224 };
1225
1226 #define elf32_arm_tdata(abfd) \
1227 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
1228
1229 #define elf32_arm_local_got_tls_type(abfd) \
1230 (elf32_arm_tdata (abfd)->local_got_tls_type)
1231
1232 static bfd_boolean
1233 elf32_arm_mkobject (bfd *abfd)
1234 {
1235 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
1236 abfd->tdata.any = bfd_zalloc (abfd, amt);
1237 if (abfd->tdata.any == NULL)
1238 return FALSE;
1239 return TRUE;
1240 }
1241
1242 /* The ARM linker needs to keep track of the number of relocs that it
1243 decides to copy in check_relocs for each symbol. This is so that
1244 it can discard PC relative relocs if it doesn't need them when
1245 linking with -Bsymbolic. We store the information in a field
1246 extending the regular ELF linker hash table. */
1247
1248 /* This structure keeps track of the number of relocs we have copied
1249 for a given symbol. */
1250 struct elf32_arm_relocs_copied
1251 {
1252 /* Next section. */
1253 struct elf32_arm_relocs_copied * next;
1254 /* A section in dynobj. */
1255 asection * section;
1256 /* Number of relocs copied in this section. */
1257 bfd_size_type count;
1258 /* Number of PC-relative relocs copied in this section. */
1259 bfd_size_type pc_count;
1260 };
1261
1262 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
1263
1264 /* Arm ELF linker hash entry. */
1265 struct elf32_arm_link_hash_entry
1266 {
1267 struct elf_link_hash_entry root;
1268
1269 /* Number of PC relative relocs copied for this symbol. */
1270 struct elf32_arm_relocs_copied * relocs_copied;
1271
1272 /* We reference count Thumb references to a PLT entry separately,
1273 so that we can emit the Thumb trampoline only if needed. */
1274 bfd_signed_vma plt_thumb_refcount;
1275
1276 /* Since PLT entries have variable size if the Thumb prologue is
1277 used, we need to record the index into .got.plt instead of
1278 recomputing it from the PLT offset. */
1279 bfd_signed_vma plt_got_offset;
1280
1281 #define GOT_UNKNOWN 0
1282 #define GOT_NORMAL 1
1283 #define GOT_TLS_GD 2
1284 #define GOT_TLS_IE 4
1285 unsigned char tls_type;
1286 };
1287
1288 /* Traverse an arm ELF linker hash table. */
1289 #define elf32_arm_link_hash_traverse(table, func, info) \
1290 (elf_link_hash_traverse \
1291 (&(table)->root, \
1292 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1293 (info)))
1294
1295 /* Get the ARM elf linker hash table from a link_info structure. */
1296 #define elf32_arm_hash_table(info) \
1297 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1298
1299 /* ARM ELF linker hash table. */
1300 struct elf32_arm_link_hash_table
1301 {
1302 /* The main hash table. */
1303 struct elf_link_hash_table root;
1304
1305 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1306 bfd_size_type thumb_glue_size;
1307
1308 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1309 bfd_size_type arm_glue_size;
1310
1311 /* An arbitrary input BFD chosen to hold the glue sections. */
1312 bfd * bfd_of_glue_owner;
1313
1314 /* Nonzero to output a BE8 image. */
1315 int byteswap_code;
1316
1317 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1318 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1319 int target1_is_rel;
1320
1321 /* The relocation to use for R_ARM_TARGET2 relocations. */
1322 int target2_reloc;
1323
1324 /* Nonzero to fix BX instructions for ARMv4 targets. */
1325 int fix_v4bx;
1326
1327 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
1328 int use_blx;
1329
1330 /* The number of bytes in the initial entry in the PLT. */
1331 bfd_size_type plt_header_size;
1332
1333 /* The number of bytes in the subsequent PLT etries. */
1334 bfd_size_type plt_entry_size;
1335
1336 /* True if the target system is Symbian OS. */
1337 int symbian_p;
1338
1339 /* True if the target uses REL relocations. */
1340 int use_rel;
1341
1342 /* Short-cuts to get to dynamic linker sections. */
1343 asection *sgot;
1344 asection *sgotplt;
1345 asection *srelgot;
1346 asection *splt;
1347 asection *srelplt;
1348 asection *sdynbss;
1349 asection *srelbss;
1350
1351 /* Data for R_ARM_TLS_LDM32 relocations. */
1352 union {
1353 bfd_signed_vma refcount;
1354 bfd_vma offset;
1355 } tls_ldm_got;
1356
1357 /* Small local sym to section mapping cache. */
1358 struct sym_sec_cache sym_sec;
1359
1360 /* For convenience in allocate_dynrelocs. */
1361 bfd * obfd;
1362 };
1363
1364 /* Create an entry in an ARM ELF linker hash table. */
1365
1366 static struct bfd_hash_entry *
1367 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1368 struct bfd_hash_table * table,
1369 const char * string)
1370 {
1371 struct elf32_arm_link_hash_entry * ret =
1372 (struct elf32_arm_link_hash_entry *) entry;
1373
1374 /* Allocate the structure if it has not already been allocated by a
1375 subclass. */
1376 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1377 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1378 if (ret == NULL)
1379 return (struct bfd_hash_entry *) ret;
1380
1381 /* Call the allocation method of the superclass. */
1382 ret = ((struct elf32_arm_link_hash_entry *)
1383 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1384 table, string));
1385 if (ret != NULL)
1386 {
1387 ret->relocs_copied = NULL;
1388 ret->tls_type = GOT_UNKNOWN;
1389 ret->plt_thumb_refcount = 0;
1390 ret->plt_got_offset = -1;
1391 }
1392
1393 return (struct bfd_hash_entry *) ret;
1394 }
1395
1396 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1397 shortcuts to them in our hash table. */
1398
1399 static bfd_boolean
1400 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1401 {
1402 struct elf32_arm_link_hash_table *htab;
1403
1404 htab = elf32_arm_hash_table (info);
1405 /* BPABI objects never have a GOT, or associated sections. */
1406 if (htab->symbian_p)
1407 return TRUE;
1408
1409 if (! _bfd_elf_create_got_section (dynobj, info))
1410 return FALSE;
1411
1412 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1413 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1414 if (!htab->sgot || !htab->sgotplt)
1415 abort ();
1416
1417 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
1418 if (htab->srelgot == NULL
1419 || ! bfd_set_section_flags (dynobj, htab->srelgot,
1420 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1421 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1422 | SEC_READONLY))
1423 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1424 return FALSE;
1425 return TRUE;
1426 }
1427
1428 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1429 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1430 hash table. */
1431
1432 static bfd_boolean
1433 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1434 {
1435 struct elf32_arm_link_hash_table *htab;
1436
1437 htab = elf32_arm_hash_table (info);
1438 if (!htab->sgot && !create_got_section (dynobj, info))
1439 return FALSE;
1440
1441 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1442 return FALSE;
1443
1444 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1445 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1446 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1447 if (!info->shared)
1448 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1449
1450 if (!htab->splt
1451 || !htab->srelplt
1452 || !htab->sdynbss
1453 || (!info->shared && !htab->srelbss))
1454 abort ();
1455
1456 return TRUE;
1457 }
1458
1459 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1460
1461 static void
1462 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1463 struct elf_link_hash_entry *dir,
1464 struct elf_link_hash_entry *ind)
1465 {
1466 struct elf32_arm_link_hash_entry *edir, *eind;
1467
1468 edir = (struct elf32_arm_link_hash_entry *) dir;
1469 eind = (struct elf32_arm_link_hash_entry *) ind;
1470
1471 if (eind->relocs_copied != NULL)
1472 {
1473 if (edir->relocs_copied != NULL)
1474 {
1475 struct elf32_arm_relocs_copied **pp;
1476 struct elf32_arm_relocs_copied *p;
1477
1478 if (ind->root.type == bfd_link_hash_indirect)
1479 abort ();
1480
1481 /* Add reloc counts against the weak sym to the strong sym
1482 list. Merge any entries against the same section. */
1483 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1484 {
1485 struct elf32_arm_relocs_copied *q;
1486
1487 for (q = edir->relocs_copied; q != NULL; q = q->next)
1488 if (q->section == p->section)
1489 {
1490 q->pc_count += p->pc_count;
1491 q->count += p->count;
1492 *pp = p->next;
1493 break;
1494 }
1495 if (q == NULL)
1496 pp = &p->next;
1497 }
1498 *pp = edir->relocs_copied;
1499 }
1500
1501 edir->relocs_copied = eind->relocs_copied;
1502 eind->relocs_copied = NULL;
1503 }
1504
1505 /* If the direct symbol already has an associated PLT entry, the
1506 indirect symbol should not. If it doesn't, swap refcount information
1507 from the indirect symbol. */
1508 if (edir->plt_thumb_refcount == 0)
1509 {
1510 edir->plt_thumb_refcount = eind->plt_thumb_refcount;
1511 eind->plt_thumb_refcount = 0;
1512 }
1513 else
1514 BFD_ASSERT (eind->plt_thumb_refcount == 0);
1515
1516 if (ind->root.type == bfd_link_hash_indirect
1517 && dir->got.refcount <= 0)
1518 {
1519 edir->tls_type = eind->tls_type;
1520 eind->tls_type = GOT_UNKNOWN;
1521 }
1522
1523 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1524 }
1525
1526 /* Create an ARM elf linker hash table. */
1527
1528 static struct bfd_link_hash_table *
1529 elf32_arm_link_hash_table_create (bfd *abfd)
1530 {
1531 struct elf32_arm_link_hash_table *ret;
1532 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1533
1534 ret = bfd_malloc (amt);
1535 if (ret == NULL)
1536 return NULL;
1537
1538 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1539 elf32_arm_link_hash_newfunc))
1540 {
1541 free (ret);
1542 return NULL;
1543 }
1544
1545 ret->sgot = NULL;
1546 ret->sgotplt = NULL;
1547 ret->srelgot = NULL;
1548 ret->splt = NULL;
1549 ret->srelplt = NULL;
1550 ret->sdynbss = NULL;
1551 ret->srelbss = NULL;
1552 ret->thumb_glue_size = 0;
1553 ret->arm_glue_size = 0;
1554 ret->bfd_of_glue_owner = NULL;
1555 ret->byteswap_code = 0;
1556 ret->target1_is_rel = 0;
1557 ret->target2_reloc = R_ARM_NONE;
1558 #ifdef FOUR_WORD_PLT
1559 ret->plt_header_size = 16;
1560 ret->plt_entry_size = 16;
1561 #else
1562 ret->plt_header_size = 20;
1563 ret->plt_entry_size = 12;
1564 #endif
1565 ret->fix_v4bx = 0;
1566 ret->use_blx = 0;
1567 ret->symbian_p = 0;
1568 ret->use_rel = 1;
1569 ret->sym_sec.abfd = NULL;
1570 ret->obfd = abfd;
1571 ret->tls_ldm_got.refcount = 0;
1572
1573 return &ret->root.root;
1574 }
1575
1576 /* Locate the Thumb encoded calling stub for NAME. */
1577
1578 static struct elf_link_hash_entry *
1579 find_thumb_glue (struct bfd_link_info *link_info,
1580 const char *name,
1581 bfd *input_bfd)
1582 {
1583 char *tmp_name;
1584 struct elf_link_hash_entry *hash;
1585 struct elf32_arm_link_hash_table *hash_table;
1586
1587 /* We need a pointer to the armelf specific hash table. */
1588 hash_table = elf32_arm_hash_table (link_info);
1589
1590 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1591 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1592
1593 BFD_ASSERT (tmp_name);
1594
1595 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1596
1597 hash = elf_link_hash_lookup
1598 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1599
1600 if (hash == NULL)
1601 /* xgettext:c-format */
1602 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1603 input_bfd, tmp_name, name);
1604
1605 free (tmp_name);
1606
1607 return hash;
1608 }
1609
1610 /* Locate the ARM encoded calling stub for NAME. */
1611
1612 static struct elf_link_hash_entry *
1613 find_arm_glue (struct bfd_link_info *link_info,
1614 const char *name,
1615 bfd *input_bfd)
1616 {
1617 char *tmp_name;
1618 struct elf_link_hash_entry *myh;
1619 struct elf32_arm_link_hash_table *hash_table;
1620
1621 /* We need a pointer to the elfarm specific hash table. */
1622 hash_table = elf32_arm_hash_table (link_info);
1623
1624 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1625 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1626
1627 BFD_ASSERT (tmp_name);
1628
1629 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1630
1631 myh = elf_link_hash_lookup
1632 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1633
1634 if (myh == NULL)
1635 /* xgettext:c-format */
1636 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1637 input_bfd, tmp_name, name);
1638
1639 free (tmp_name);
1640
1641 return myh;
1642 }
1643
1644 /* ARM->Thumb glue (static images):
1645
1646 .arm
1647 __func_from_arm:
1648 ldr r12, __func_addr
1649 bx r12
1650 __func_addr:
1651 .word func @ behave as if you saw a ARM_32 reloc.
1652
1653 (relocatable images)
1654 .arm
1655 __func_from_arm:
1656 ldr r12, __func_offset
1657 add r12, r12, pc
1658 bx r12
1659 __func_offset:
1660 .word func - .
1661 */
1662
1663 #define ARM2THUMB_STATIC_GLUE_SIZE 12
1664 static const insn32 a2t1_ldr_insn = 0xe59fc000;
1665 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1666 static const insn32 a2t3_func_addr_insn = 0x00000001;
1667
1668 #define ARM2THUMB_PIC_GLUE_SIZE 16
1669 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
1670 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
1671 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
1672
1673 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1674
1675 .thumb .thumb
1676 .align 2 .align 2
1677 __func_from_thumb: __func_from_thumb:
1678 bx pc push {r6, lr}
1679 nop ldr r6, __func_addr
1680 .arm mov lr, pc
1681 __func_change_to_arm: bx r6
1682 b func .arm
1683 __func_back_to_thumb:
1684 ldmia r13! {r6, lr}
1685 bx lr
1686 __func_addr:
1687 .word func */
1688
1689 #define THUMB2ARM_GLUE_SIZE 8
1690 static const insn16 t2a1_bx_pc_insn = 0x4778;
1691 static const insn16 t2a2_noop_insn = 0x46c0;
1692 static const insn32 t2a3_b_insn = 0xea000000;
1693
1694 #ifndef ELFARM_NABI_C_INCLUDED
1695 bfd_boolean
1696 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
1697 {
1698 asection * s;
1699 bfd_byte * foo;
1700 struct elf32_arm_link_hash_table * globals;
1701
1702 globals = elf32_arm_hash_table (info);
1703
1704 BFD_ASSERT (globals != NULL);
1705
1706 if (globals->arm_glue_size != 0)
1707 {
1708 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1709
1710 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
1711 ARM2THUMB_GLUE_SECTION_NAME);
1712
1713 BFD_ASSERT (s != NULL);
1714
1715 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
1716
1717 s->size = globals->arm_glue_size;
1718 s->contents = foo;
1719 }
1720
1721 if (globals->thumb_glue_size != 0)
1722 {
1723 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1724
1725 s = bfd_get_section_by_name
1726 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1727
1728 BFD_ASSERT (s != NULL);
1729
1730 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
1731
1732 s->size = globals->thumb_glue_size;
1733 s->contents = foo;
1734 }
1735
1736 return TRUE;
1737 }
1738
1739 static void
1740 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
1741 struct elf_link_hash_entry * h)
1742 {
1743 const char * name = h->root.root.string;
1744 asection * s;
1745 char * tmp_name;
1746 struct elf_link_hash_entry * myh;
1747 struct bfd_link_hash_entry * bh;
1748 struct elf32_arm_link_hash_table * globals;
1749 bfd_vma val;
1750
1751 globals = elf32_arm_hash_table (link_info);
1752
1753 BFD_ASSERT (globals != NULL);
1754 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1755
1756 s = bfd_get_section_by_name
1757 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1758
1759 BFD_ASSERT (s != NULL);
1760
1761 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1762
1763 BFD_ASSERT (tmp_name);
1764
1765 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1766
1767 myh = elf_link_hash_lookup
1768 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
1769
1770 if (myh != NULL)
1771 {
1772 /* We've already seen this guy. */
1773 free (tmp_name);
1774 return;
1775 }
1776
1777 /* The only trick here is using hash_table->arm_glue_size as the value.
1778 Even though the section isn't allocated yet, this is where we will be
1779 putting it. */
1780 bh = NULL;
1781 val = globals->arm_glue_size + 1;
1782 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
1783 tmp_name, BSF_GLOBAL, s, val,
1784 NULL, TRUE, FALSE, &bh);
1785
1786 myh = (struct elf_link_hash_entry *) bh;
1787 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
1788 myh->forced_local = 1;
1789
1790 free (tmp_name);
1791
1792 if ((link_info->shared || globals->root.is_relocatable_executable))
1793 globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE;
1794 else
1795 globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE;
1796
1797 return;
1798 }
1799
1800 static void
1801 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
1802 struct elf_link_hash_entry *h)
1803 {
1804 const char *name = h->root.root.string;
1805 asection *s;
1806 char *tmp_name;
1807 struct elf_link_hash_entry *myh;
1808 struct bfd_link_hash_entry *bh;
1809 struct elf32_arm_link_hash_table *hash_table;
1810 bfd_vma val;
1811
1812 hash_table = elf32_arm_hash_table (link_info);
1813
1814 BFD_ASSERT (hash_table != NULL);
1815 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
1816
1817 s = bfd_get_section_by_name
1818 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1819
1820 BFD_ASSERT (s != NULL);
1821
1822 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1823 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1824
1825 BFD_ASSERT (tmp_name);
1826
1827 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1828
1829 myh = elf_link_hash_lookup
1830 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1831
1832 if (myh != NULL)
1833 {
1834 /* We've already seen this guy. */
1835 free (tmp_name);
1836 return;
1837 }
1838
1839 bh = NULL;
1840 val = hash_table->thumb_glue_size + 1;
1841 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1842 tmp_name, BSF_GLOBAL, s, val,
1843 NULL, TRUE, FALSE, &bh);
1844
1845 /* If we mark it 'Thumb', the disassembler will do a better job. */
1846 myh = (struct elf_link_hash_entry *) bh;
1847 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
1848 myh->forced_local = 1;
1849
1850 free (tmp_name);
1851
1852 #define CHANGE_TO_ARM "__%s_change_to_arm"
1853 #define BACK_FROM_ARM "__%s_back_from_arm"
1854
1855 /* Allocate another symbol to mark where we switch to Arm mode. */
1856 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1857 + strlen (CHANGE_TO_ARM) + 1);
1858
1859 BFD_ASSERT (tmp_name);
1860
1861 sprintf (tmp_name, CHANGE_TO_ARM, name);
1862
1863 bh = NULL;
1864 val = hash_table->thumb_glue_size + 4,
1865 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
1866 tmp_name, BSF_LOCAL, s, val,
1867 NULL, TRUE, FALSE, &bh);
1868
1869 free (tmp_name);
1870
1871 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
1872
1873 return;
1874 }
1875
1876 /* Add the glue sections to ABFD. This function is called from the
1877 linker scripts in ld/emultempl/{armelf}.em. */
1878
1879 bfd_boolean
1880 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
1881 struct bfd_link_info *info)
1882 {
1883 flagword flags;
1884 asection *sec;
1885
1886 /* If we are only performing a partial
1887 link do not bother adding the glue. */
1888 if (info->relocatable)
1889 return TRUE;
1890
1891 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1892
1893 if (sec == NULL)
1894 {
1895 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
1896 will prevent elf_link_input_bfd() from processing the contents
1897 of this section. */
1898 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
1899
1900 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
1901
1902 if (sec == NULL
1903 || !bfd_set_section_flags (abfd, sec, flags)
1904 || !bfd_set_section_alignment (abfd, sec, 2))
1905 return FALSE;
1906
1907 /* Set the gc mark to prevent the section from being removed by garbage
1908 collection, despite the fact that no relocs refer to this section. */
1909 sec->gc_mark = 1;
1910 }
1911
1912 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1913
1914 if (sec == NULL)
1915 {
1916 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1917 | SEC_CODE | SEC_READONLY;
1918
1919 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
1920
1921 if (sec == NULL
1922 || !bfd_set_section_flags (abfd, sec, flags)
1923 || !bfd_set_section_alignment (abfd, sec, 2))
1924 return FALSE;
1925
1926 sec->gc_mark = 1;
1927 }
1928
1929 return TRUE;
1930 }
1931
1932 /* Select a BFD to be used to hold the sections used by the glue code.
1933 This function is called from the linker scripts in ld/emultempl/
1934 {armelf/pe}.em */
1935
1936 bfd_boolean
1937 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
1938 {
1939 struct elf32_arm_link_hash_table *globals;
1940
1941 /* If we are only performing a partial link
1942 do not bother getting a bfd to hold the glue. */
1943 if (info->relocatable)
1944 return TRUE;
1945
1946 /* Make sure we don't attach the glue sections to a dynamic object. */
1947 BFD_ASSERT (!(abfd->flags & DYNAMIC));
1948
1949 globals = elf32_arm_hash_table (info);
1950
1951 BFD_ASSERT (globals != NULL);
1952
1953 if (globals->bfd_of_glue_owner != NULL)
1954 return TRUE;
1955
1956 /* Save the bfd for later use. */
1957 globals->bfd_of_glue_owner = abfd;
1958
1959 return TRUE;
1960 }
1961
1962 bfd_boolean
1963 bfd_elf32_arm_process_before_allocation (bfd *abfd,
1964 struct bfd_link_info *link_info,
1965 int byteswap_code)
1966 {
1967 Elf_Internal_Shdr *symtab_hdr;
1968 Elf_Internal_Rela *internal_relocs = NULL;
1969 Elf_Internal_Rela *irel, *irelend;
1970 bfd_byte *contents = NULL;
1971
1972 asection *sec;
1973 struct elf32_arm_link_hash_table *globals;
1974
1975 /* If we are only performing a partial link do not bother
1976 to construct any glue. */
1977 if (link_info->relocatable)
1978 return TRUE;
1979
1980 /* Here we have a bfd that is to be included on the link. We have a hook
1981 to do reloc rummaging, before section sizes are nailed down. */
1982 globals = elf32_arm_hash_table (link_info);
1983
1984 BFD_ASSERT (globals != NULL);
1985 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1986
1987 if (byteswap_code && !bfd_big_endian (abfd))
1988 {
1989 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
1990 abfd);
1991 return FALSE;
1992 }
1993 globals->byteswap_code = byteswap_code;
1994
1995 /* Rummage around all the relocs and map the glue vectors. */
1996 sec = abfd->sections;
1997
1998 if (sec == NULL)
1999 return TRUE;
2000
2001 for (; sec != NULL; sec = sec->next)
2002 {
2003 if (sec->reloc_count == 0)
2004 continue;
2005
2006 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2007
2008 /* Load the relocs. */
2009 internal_relocs
2010 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
2011 (Elf_Internal_Rela *) NULL, FALSE);
2012
2013 if (internal_relocs == NULL)
2014 goto error_return;
2015
2016 irelend = internal_relocs + sec->reloc_count;
2017 for (irel = internal_relocs; irel < irelend; irel++)
2018 {
2019 long r_type;
2020 unsigned long r_index;
2021
2022 struct elf_link_hash_entry *h;
2023
2024 r_type = ELF32_R_TYPE (irel->r_info);
2025 r_index = ELF32_R_SYM (irel->r_info);
2026
2027 /* These are the only relocation types we care about. */
2028 if ( r_type != R_ARM_PC24
2029 && r_type != R_ARM_PLT32
2030 #ifndef OLD_ARM_ABI
2031 && r_type != R_ARM_CALL
2032 && r_type != R_ARM_JUMP24
2033 #endif
2034 && r_type != R_ARM_THM_PC22)
2035 continue;
2036
2037 /* Get the section contents if we haven't done so already. */
2038 if (contents == NULL)
2039 {
2040 /* Get cached copy if it exists. */
2041 if (elf_section_data (sec)->this_hdr.contents != NULL)
2042 contents = elf_section_data (sec)->this_hdr.contents;
2043 else
2044 {
2045 /* Go get them off disk. */
2046 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2047 goto error_return;
2048 }
2049 }
2050
2051 /* If the relocation is not against a symbol it cannot concern us. */
2052 h = NULL;
2053
2054 /* We don't care about local symbols. */
2055 if (r_index < symtab_hdr->sh_info)
2056 continue;
2057
2058 /* This is an external symbol. */
2059 r_index -= symtab_hdr->sh_info;
2060 h = (struct elf_link_hash_entry *)
2061 elf_sym_hashes (abfd)[r_index];
2062
2063 /* If the relocation is against a static symbol it must be within
2064 the current section and so cannot be a cross ARM/Thumb relocation. */
2065 if (h == NULL)
2066 continue;
2067
2068 /* If the call will go through a PLT entry then we do not need
2069 glue. */
2070 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
2071 continue;
2072
2073 switch (r_type)
2074 {
2075 case R_ARM_PC24:
2076 #ifndef OLD_ARM_ABI
2077 case R_ARM_CALL:
2078 case R_ARM_JUMP24:
2079 #endif
2080 /* This one is a call from arm code. We need to look up
2081 the target of the call. If it is a thumb target, we
2082 insert glue. */
2083 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
2084 record_arm_to_thumb_glue (link_info, h);
2085 break;
2086
2087 case R_ARM_THM_PC22:
2088 /* This one is a call from thumb code. We look
2089 up the target of the call. If it is not a thumb
2090 target, we insert glue. */
2091 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
2092 record_thumb_to_arm_glue (link_info, h);
2093 break;
2094
2095 default:
2096 break;
2097 }
2098 }
2099
2100 if (contents != NULL
2101 && elf_section_data (sec)->this_hdr.contents != contents)
2102 free (contents);
2103 contents = NULL;
2104
2105 if (internal_relocs != NULL
2106 && elf_section_data (sec)->relocs != internal_relocs)
2107 free (internal_relocs);
2108 internal_relocs = NULL;
2109 }
2110
2111 return TRUE;
2112
2113 error_return:
2114 if (contents != NULL
2115 && elf_section_data (sec)->this_hdr.contents != contents)
2116 free (contents);
2117 if (internal_relocs != NULL
2118 && elf_section_data (sec)->relocs != internal_relocs)
2119 free (internal_relocs);
2120
2121 return FALSE;
2122 }
2123 #endif
2124
2125
2126 #ifndef OLD_ARM_ABI
2127 /* Set target relocation values needed during linking. */
2128
2129 void
2130 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
2131 int target1_is_rel,
2132 char * target2_type,
2133 int fix_v4bx,
2134 int use_blx)
2135 {
2136 struct elf32_arm_link_hash_table *globals;
2137
2138 globals = elf32_arm_hash_table (link_info);
2139
2140 globals->target1_is_rel = target1_is_rel;
2141 if (strcmp (target2_type, "rel") == 0)
2142 globals->target2_reloc = R_ARM_REL32;
2143 else if (strcmp (target2_type, "abs") == 0)
2144 globals->target2_reloc = R_ARM_ABS32;
2145 else if (strcmp (target2_type, "got-rel") == 0)
2146 globals->target2_reloc = R_ARM_GOT_PREL;
2147 else
2148 {
2149 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
2150 target2_type);
2151 }
2152 globals->fix_v4bx = fix_v4bx;
2153 globals->use_blx |= use_blx;
2154 }
2155 #endif
2156
2157 /* The thumb form of a long branch is a bit finicky, because the offset
2158 encoding is split over two fields, each in it's own instruction. They
2159 can occur in any order. So given a thumb form of long branch, and an
2160 offset, insert the offset into the thumb branch and return finished
2161 instruction.
2162
2163 It takes two thumb instructions to encode the target address. Each has
2164 11 bits to invest. The upper 11 bits are stored in one (identified by
2165 H-0.. see below), the lower 11 bits are stored in the other (identified
2166 by H-1).
2167
2168 Combine together and shifted left by 1 (it's a half word address) and
2169 there you have it.
2170
2171 Op: 1111 = F,
2172 H-0, upper address-0 = 000
2173 Op: 1111 = F,
2174 H-1, lower address-0 = 800
2175
2176 They can be ordered either way, but the arm tools I've seen always put
2177 the lower one first. It probably doesn't matter. krk@cygnus.com
2178
2179 XXX: Actually the order does matter. The second instruction (H-1)
2180 moves the computed address into the PC, so it must be the second one
2181 in the sequence. The problem, however is that whilst little endian code
2182 stores the instructions in HI then LOW order, big endian code does the
2183 reverse. nickc@cygnus.com. */
2184
2185 #define LOW_HI_ORDER 0xF800F000
2186 #define HI_LOW_ORDER 0xF000F800
2187
2188 static insn32
2189 insert_thumb_branch (insn32 br_insn, int rel_off)
2190 {
2191 unsigned int low_bits;
2192 unsigned int high_bits;
2193
2194 BFD_ASSERT ((rel_off & 1) != 1);
2195
2196 rel_off >>= 1; /* Half word aligned address. */
2197 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2198 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
2199
2200 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2201 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2202 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2203 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2204 else
2205 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2206 abort (); /* Error - not a valid branch instruction form. */
2207
2208 return br_insn;
2209 }
2210
2211 /* Thumb code calling an ARM function. */
2212
2213 static int
2214 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2215 const char * name,
2216 bfd * input_bfd,
2217 bfd * output_bfd,
2218 asection * input_section,
2219 bfd_byte * hit_data,
2220 asection * sym_sec,
2221 bfd_vma offset,
2222 bfd_signed_vma addend,
2223 bfd_vma val)
2224 {
2225 asection * s = 0;
2226 bfd_vma my_offset;
2227 unsigned long int tmp;
2228 long int ret_offset;
2229 struct elf_link_hash_entry * myh;
2230 struct elf32_arm_link_hash_table * globals;
2231
2232 myh = find_thumb_glue (info, name, input_bfd);
2233 if (myh == NULL)
2234 return FALSE;
2235
2236 globals = elf32_arm_hash_table (info);
2237
2238 BFD_ASSERT (globals != NULL);
2239 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2240
2241 my_offset = myh->root.u.def.value;
2242
2243 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2244 THUMB2ARM_GLUE_SECTION_NAME);
2245
2246 BFD_ASSERT (s != NULL);
2247 BFD_ASSERT (s->contents != NULL);
2248 BFD_ASSERT (s->output_section != NULL);
2249
2250 if ((my_offset & 0x01) == 0x01)
2251 {
2252 if (sym_sec != NULL
2253 && sym_sec->owner != NULL
2254 && !INTERWORK_FLAG (sym_sec->owner))
2255 {
2256 (*_bfd_error_handler)
2257 (_("%B(%s): warning: interworking not enabled.\n"
2258 " first occurrence: %B: thumb call to arm"),
2259 sym_sec->owner, input_bfd, name);
2260
2261 return FALSE;
2262 }
2263
2264 --my_offset;
2265 myh->root.u.def.value = my_offset;
2266
2267 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2268 s->contents + my_offset);
2269
2270 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2271 s->contents + my_offset + 2);
2272
2273 ret_offset =
2274 /* Address of destination of the stub. */
2275 ((bfd_signed_vma) val)
2276 - ((bfd_signed_vma)
2277 /* Offset from the start of the current section
2278 to the start of the stubs. */
2279 (s->output_offset
2280 /* Offset of the start of this stub from the start of the stubs. */
2281 + my_offset
2282 /* Address of the start of the current section. */
2283 + s->output_section->vma)
2284 /* The branch instruction is 4 bytes into the stub. */
2285 + 4
2286 /* ARM branches work from the pc of the instruction + 8. */
2287 + 8);
2288
2289 bfd_put_32 (output_bfd,
2290 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2291 s->contents + my_offset + 4);
2292 }
2293
2294 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2295
2296 /* Now go back and fix up the original BL insn to point to here. */
2297 ret_offset =
2298 /* Address of where the stub is located. */
2299 (s->output_section->vma + s->output_offset + my_offset)
2300 /* Address of where the BL is located. */
2301 - (input_section->output_section->vma + input_section->output_offset
2302 + offset)
2303 /* Addend in the relocation. */
2304 - addend
2305 /* Biassing for PC-relative addressing. */
2306 - 8;
2307
2308 tmp = bfd_get_32 (input_bfd, hit_data
2309 - input_section->vma);
2310
2311 bfd_put_32 (output_bfd,
2312 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2313 hit_data - input_section->vma);
2314
2315 return TRUE;
2316 }
2317
2318 /* Arm code calling a Thumb function. */
2319
2320 static int
2321 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2322 const char * name,
2323 bfd * input_bfd,
2324 bfd * output_bfd,
2325 asection * input_section,
2326 bfd_byte * hit_data,
2327 asection * sym_sec,
2328 bfd_vma offset,
2329 bfd_signed_vma addend,
2330 bfd_vma val)
2331 {
2332 unsigned long int tmp;
2333 bfd_vma my_offset;
2334 asection * s;
2335 long int ret_offset;
2336 struct elf_link_hash_entry * myh;
2337 struct elf32_arm_link_hash_table * globals;
2338
2339 myh = find_arm_glue (info, name, input_bfd);
2340 if (myh == NULL)
2341 return FALSE;
2342
2343 globals = elf32_arm_hash_table (info);
2344
2345 BFD_ASSERT (globals != NULL);
2346 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2347
2348 my_offset = myh->root.u.def.value;
2349 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2350 ARM2THUMB_GLUE_SECTION_NAME);
2351 BFD_ASSERT (s != NULL);
2352 BFD_ASSERT (s->contents != NULL);
2353 BFD_ASSERT (s->output_section != NULL);
2354
2355 if ((my_offset & 0x01) == 0x01)
2356 {
2357 if (sym_sec != NULL
2358 && sym_sec->owner != NULL
2359 && !INTERWORK_FLAG (sym_sec->owner))
2360 {
2361 (*_bfd_error_handler)
2362 (_("%B(%s): warning: interworking not enabled.\n"
2363 " first occurrence: %B: arm call to thumb"),
2364 sym_sec->owner, input_bfd, name);
2365 }
2366
2367 --my_offset;
2368 myh->root.u.def.value = my_offset;
2369
2370 if ((info->shared || globals->root.is_relocatable_executable))
2371 {
2372 /* For relocatable objects we can't use absolute addresses,
2373 so construct the address from a relative offset. */
2374 /* TODO: If the offset is small it's probably worth
2375 constructing the address with adds. */
2376 bfd_put_32 (output_bfd, (bfd_vma) a2t1p_ldr_insn,
2377 s->contents + my_offset);
2378 bfd_put_32 (output_bfd, (bfd_vma) a2t2p_add_pc_insn,
2379 s->contents + my_offset + 4);
2380 bfd_put_32 (output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
2381 s->contents + my_offset + 8);
2382 /* Adjust the offset by 4 for the position of the add,
2383 and 8 for the pipeline offset. */
2384 ret_offset = (val - (s->output_offset
2385 + s->output_section->vma
2386 + my_offset + 12))
2387 | 1;
2388 bfd_put_32 (output_bfd, ret_offset,
2389 s->contents + my_offset + 12);
2390 }
2391 else
2392 {
2393 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2394 s->contents + my_offset);
2395
2396 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2397 s->contents + my_offset + 4);
2398
2399 /* It's a thumb address. Add the low order bit. */
2400 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2401 s->contents + my_offset + 8);
2402 }
2403 }
2404
2405 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2406
2407 tmp = bfd_get_32 (input_bfd, hit_data);
2408 tmp = tmp & 0xFF000000;
2409
2410 /* Somehow these are both 4 too far, so subtract 8. */
2411 ret_offset = (s->output_offset
2412 + my_offset
2413 + s->output_section->vma
2414 - (input_section->output_offset
2415 + input_section->output_section->vma
2416 + offset + addend)
2417 - 8);
2418
2419 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2420
2421 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2422
2423 return TRUE;
2424 }
2425
2426
2427 #ifndef OLD_ARM_ABI
2428 /* Some relocations map to different relocations depending on the
2429 target. Return the real relocation. */
2430 static int
2431 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2432 int r_type)
2433 {
2434 switch (r_type)
2435 {
2436 case R_ARM_TARGET1:
2437 if (globals->target1_is_rel)
2438 return R_ARM_REL32;
2439 else
2440 return R_ARM_ABS32;
2441
2442 case R_ARM_TARGET2:
2443 return globals->target2_reloc;
2444
2445 default:
2446 return r_type;
2447 }
2448 }
2449 #endif /* OLD_ARM_ABI */
2450
2451
2452 /* Return the base VMA address which should be subtracted from real addresses
2453 when resolving @dtpoff relocation.
2454 This is PT_TLS segment p_vaddr. */
2455
2456 static bfd_vma
2457 dtpoff_base (struct bfd_link_info *info)
2458 {
2459 /* If tls_sec is NULL, we should have signalled an error already. */
2460 if (elf_hash_table (info)->tls_sec == NULL)
2461 return 0;
2462 return elf_hash_table (info)->tls_sec->vma;
2463 }
2464
2465 /* Return the relocation value for @tpoff relocation
2466 if STT_TLS virtual address is ADDRESS. */
2467
2468 static bfd_vma
2469 tpoff (struct bfd_link_info *info, bfd_vma address)
2470 {
2471 struct elf_link_hash_table *htab = elf_hash_table (info);
2472 bfd_vma base;
2473
2474 /* If tls_sec is NULL, we should have signalled an error already. */
2475 if (htab->tls_sec == NULL)
2476 return 0;
2477 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
2478 return address - htab->tls_sec->vma + base;
2479 }
2480
2481 /* Perform a relocation as part of a final link. */
2482
2483 static bfd_reloc_status_type
2484 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2485 bfd * input_bfd,
2486 bfd * output_bfd,
2487 asection * input_section,
2488 bfd_byte * contents,
2489 Elf_Internal_Rela * rel,
2490 bfd_vma value,
2491 struct bfd_link_info * info,
2492 asection * sym_sec,
2493 const char * sym_name,
2494 int sym_flags,
2495 struct elf_link_hash_entry * h,
2496 bfd_boolean * unresolved_reloc_p)
2497 {
2498 unsigned long r_type = howto->type;
2499 unsigned long r_symndx;
2500 bfd_byte * hit_data = contents + rel->r_offset;
2501 bfd * dynobj = NULL;
2502 Elf_Internal_Shdr * symtab_hdr;
2503 struct elf_link_hash_entry ** sym_hashes;
2504 bfd_vma * local_got_offsets;
2505 asection * sgot = NULL;
2506 asection * splt = NULL;
2507 asection * sreloc = NULL;
2508 bfd_vma addend;
2509 bfd_signed_vma signed_addend;
2510 struct elf32_arm_link_hash_table * globals;
2511
2512 globals = elf32_arm_hash_table (info);
2513
2514 #ifndef OLD_ARM_ABI
2515 /* Some relocation type map to different relocations depending on the
2516 target. We pick the right one here. */
2517 r_type = arm_real_reloc_type (globals, r_type);
2518 if (r_type != howto->type)
2519 howto = elf32_arm_howto_from_type (r_type);
2520 #endif /* OLD_ARM_ABI */
2521
2522 /* If the start address has been set, then set the EF_ARM_HASENTRY
2523 flag. Setting this more than once is redundant, but the cost is
2524 not too high, and it keeps the code simple.
2525
2526 The test is done here, rather than somewhere else, because the
2527 start address is only set just before the final link commences.
2528
2529 Note - if the user deliberately sets a start address of 0, the
2530 flag will not be set. */
2531 if (bfd_get_start_address (output_bfd) != 0)
2532 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2533
2534 dynobj = elf_hash_table (info)->dynobj;
2535 if (dynobj)
2536 {
2537 sgot = bfd_get_section_by_name (dynobj, ".got");
2538 splt = bfd_get_section_by_name (dynobj, ".plt");
2539 }
2540 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2541 sym_hashes = elf_sym_hashes (input_bfd);
2542 local_got_offsets = elf_local_got_offsets (input_bfd);
2543 r_symndx = ELF32_R_SYM (rel->r_info);
2544
2545 if (globals->use_rel)
2546 {
2547 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2548
2549 if (addend & ((howto->src_mask + 1) >> 1))
2550 {
2551 signed_addend = -1;
2552 signed_addend &= ~ howto->src_mask;
2553 signed_addend |= addend;
2554 }
2555 else
2556 signed_addend = addend;
2557 }
2558 else
2559 addend = signed_addend = rel->r_addend;
2560
2561 switch (r_type)
2562 {
2563 case R_ARM_NONE:
2564 /* We don't need to find a value for this symbol. It's just a
2565 marker. */
2566 *unresolved_reloc_p = FALSE;
2567 return bfd_reloc_ok;
2568
2569 case R_ARM_PC24:
2570 case R_ARM_ABS32:
2571 case R_ARM_REL32:
2572 #ifndef OLD_ARM_ABI
2573 case R_ARM_CALL:
2574 case R_ARM_JUMP24:
2575 case R_ARM_XPC25:
2576 case R_ARM_PREL31:
2577 #endif
2578 case R_ARM_PLT32:
2579 /* r_symndx will be zero only for relocs against symbols
2580 from removed linkonce sections, or sections discarded by
2581 a linker script. */
2582 if (r_symndx == 0)
2583 return bfd_reloc_ok;
2584
2585 /* Handle relocations which should use the PLT entry. ABS32/REL32
2586 will use the symbol's value, which may point to a PLT entry, but we
2587 don't need to handle that here. If we created a PLT entry, all
2588 branches in this object should go to it. */
2589 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2590 && h != NULL
2591 && splt != NULL
2592 && h->plt.offset != (bfd_vma) -1)
2593 {
2594 /* If we've created a .plt section, and assigned a PLT entry to
2595 this function, it should not be known to bind locally. If
2596 it were, we would have cleared the PLT entry. */
2597 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2598
2599 value = (splt->output_section->vma
2600 + splt->output_offset
2601 + h->plt.offset);
2602 *unresolved_reloc_p = FALSE;
2603 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2604 contents, rel->r_offset, value,
2605 (bfd_vma) 0);
2606 }
2607
2608 /* When generating a shared object or relocatable executable, these
2609 relocations are copied into the output file to be resolved at
2610 run time. */
2611 if ((info->shared || globals->root.is_relocatable_executable)
2612 && (input_section->flags & SEC_ALLOC)
2613 && (r_type != R_ARM_REL32
2614 || !SYMBOL_CALLS_LOCAL (info, h))
2615 && (h == NULL
2616 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2617 || h->root.type != bfd_link_hash_undefweak)
2618 && r_type != R_ARM_PC24
2619 #ifndef OLD_ARM_ABI
2620 && r_type != R_ARM_CALL
2621 && r_type != R_ARM_JUMP24
2622 && r_type != R_ARM_PREL31
2623 #endif
2624 && r_type != R_ARM_PLT32)
2625 {
2626 Elf_Internal_Rela outrel;
2627 bfd_byte *loc;
2628 bfd_boolean skip, relocate;
2629
2630 *unresolved_reloc_p = FALSE;
2631
2632 if (sreloc == NULL)
2633 {
2634 const char * name;
2635
2636 name = (bfd_elf_string_from_elf_section
2637 (input_bfd,
2638 elf_elfheader (input_bfd)->e_shstrndx,
2639 elf_section_data (input_section)->rel_hdr.sh_name));
2640 if (name == NULL)
2641 return bfd_reloc_notsupported;
2642
2643 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2644 && strcmp (bfd_get_section_name (input_bfd,
2645 input_section),
2646 name + 4) == 0);
2647
2648 sreloc = bfd_get_section_by_name (dynobj, name);
2649 BFD_ASSERT (sreloc != NULL);
2650 }
2651
2652 skip = FALSE;
2653 relocate = FALSE;
2654
2655 outrel.r_offset =
2656 _bfd_elf_section_offset (output_bfd, info, input_section,
2657 rel->r_offset);
2658 if (outrel.r_offset == (bfd_vma) -1)
2659 skip = TRUE;
2660 else if (outrel.r_offset == (bfd_vma) -2)
2661 skip = TRUE, relocate = TRUE;
2662 outrel.r_offset += (input_section->output_section->vma
2663 + input_section->output_offset);
2664
2665 if (skip)
2666 memset (&outrel, 0, sizeof outrel);
2667 else if (h != NULL
2668 && h->dynindx != -1
2669 && (!info->shared
2670 || !info->symbolic
2671 || !h->def_regular))
2672 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2673 else
2674 {
2675 int symbol;
2676
2677 /* This symbol is local, or marked to become local. */
2678 relocate = TRUE;
2679 if (sym_flags == STT_ARM_TFUNC)
2680 value |= 1;
2681 if (globals->symbian_p)
2682 {
2683 /* On Symbian OS, the data segment and text segement
2684 can be relocated independently. Therefore, we
2685 must indicate the segment to which this
2686 relocation is relative. The BPABI allows us to
2687 use any symbol in the right segment; we just use
2688 the section symbol as it is convenient. (We
2689 cannot use the symbol given by "h" directly as it
2690 will not appear in the dynamic symbol table.) */
2691 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2692 BFD_ASSERT (symbol != 0);
2693 }
2694 else
2695 /* On SVR4-ish systems, the dynamic loader cannot
2696 relocate the text and data segments independently,
2697 so the symbol does not matter. */
2698 symbol = 0;
2699 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
2700 }
2701
2702 loc = sreloc->contents;
2703 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2704 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2705
2706 /* If this reloc is against an external symbol, we do not want to
2707 fiddle with the addend. Otherwise, we need to include the symbol
2708 value so that it becomes an addend for the dynamic reloc. */
2709 if (! relocate)
2710 return bfd_reloc_ok;
2711
2712 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2713 contents, rel->r_offset, value,
2714 (bfd_vma) 0);
2715 }
2716 else switch (r_type)
2717 {
2718 #ifndef OLD_ARM_ABI
2719 case R_ARM_XPC25: /* Arm BLX instruction. */
2720 case R_ARM_CALL:
2721 case R_ARM_JUMP24:
2722 #endif
2723 case R_ARM_PC24: /* Arm B/BL instruction */
2724 case R_ARM_PLT32:
2725 #ifndef OLD_ARM_ABI
2726 if (r_type == R_ARM_XPC25)
2727 {
2728 /* Check for Arm calling Arm function. */
2729 /* FIXME: Should we translate the instruction into a BL
2730 instruction instead ? */
2731 if (sym_flags != STT_ARM_TFUNC)
2732 (*_bfd_error_handler)
2733 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
2734 input_bfd,
2735 h ? h->root.root.string : "(local)");
2736 }
2737 else
2738 #endif
2739 {
2740 /* Check for Arm calling Thumb function. */
2741 if (sym_flags == STT_ARM_TFUNC)
2742 {
2743 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
2744 output_bfd, input_section,
2745 hit_data, sym_sec, rel->r_offset,
2746 signed_addend, value);
2747 return bfd_reloc_ok;
2748 }
2749 }
2750
2751 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
2752 where:
2753 S is the address of the symbol in the relocation.
2754 P is address of the instruction being relocated.
2755 A is the addend (extracted from the instruction) in bytes.
2756
2757 S is held in 'value'.
2758 P is the base address of the section containing the
2759 instruction plus the offset of the reloc into that
2760 section, ie:
2761 (input_section->output_section->vma +
2762 input_section->output_offset +
2763 rel->r_offset).
2764 A is the addend, converted into bytes, ie:
2765 (signed_addend * 4)
2766
2767 Note: None of these operations have knowledge of the pipeline
2768 size of the processor, thus it is up to the assembler to
2769 encode this information into the addend. */
2770 value -= (input_section->output_section->vma
2771 + input_section->output_offset);
2772 value -= rel->r_offset;
2773 if (globals->use_rel)
2774 value += (signed_addend << howto->size);
2775 else
2776 /* RELA addends do not have to be adjusted by howto->size. */
2777 value += signed_addend;
2778
2779 signed_addend = value;
2780 signed_addend >>= howto->rightshift;
2781
2782 /* It is not an error for an undefined weak reference to be
2783 out of range. Any program that branches to such a symbol
2784 is going to crash anyway, so there is no point worrying
2785 about getting the destination exactly right. */
2786 if (! h || h->root.type != bfd_link_hash_undefweak)
2787 {
2788 /* Perform a signed range check. */
2789 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
2790 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
2791 return bfd_reloc_overflow;
2792 }
2793
2794 #ifndef OLD_ARM_ABI
2795 /* If necessary set the H bit in the BLX instruction. */
2796 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
2797 value = (signed_addend & howto->dst_mask)
2798 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
2799 | (1 << 24);
2800 else
2801 #endif
2802 value = (signed_addend & howto->dst_mask)
2803 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
2804 break;
2805
2806 case R_ARM_ABS32:
2807 value += addend;
2808 if (sym_flags == STT_ARM_TFUNC)
2809 value |= 1;
2810 break;
2811
2812 case R_ARM_REL32:
2813 value -= (input_section->output_section->vma
2814 + input_section->output_offset + rel->r_offset);
2815 value += addend;
2816 break;
2817
2818 #ifndef OLD_ARM_ABI
2819 case R_ARM_PREL31:
2820 value -= (input_section->output_section->vma
2821 + input_section->output_offset + rel->r_offset);
2822 value += signed_addend;
2823 if (! h || h->root.type != bfd_link_hash_undefweak)
2824 {
2825 /* Check for overflow */
2826 if ((value ^ (value >> 1)) & (1 << 30))
2827 return bfd_reloc_overflow;
2828 }
2829 value &= 0x7fffffff;
2830 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
2831 if (sym_flags == STT_ARM_TFUNC)
2832 value |= 1;
2833 break;
2834 #endif
2835 }
2836
2837 bfd_put_32 (input_bfd, value, hit_data);
2838 return bfd_reloc_ok;
2839
2840 case R_ARM_ABS8:
2841 value += addend;
2842 if ((long) value > 0x7f || (long) value < -0x80)
2843 return bfd_reloc_overflow;
2844
2845 bfd_put_8 (input_bfd, value, hit_data);
2846 return bfd_reloc_ok;
2847
2848 case R_ARM_ABS16:
2849 value += addend;
2850
2851 if ((long) value > 0x7fff || (long) value < -0x8000)
2852 return bfd_reloc_overflow;
2853
2854 bfd_put_16 (input_bfd, value, hit_data);
2855 return bfd_reloc_ok;
2856
2857 case R_ARM_ABS12:
2858 /* Support ldr and str instruction for the arm */
2859 /* Also thumb b (unconditional branch). ??? Really? */
2860 value += addend;
2861
2862 if ((long) value > 0x7ff || (long) value < -0x800)
2863 return bfd_reloc_overflow;
2864
2865 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
2866 bfd_put_32 (input_bfd, value, hit_data);
2867 return bfd_reloc_ok;
2868
2869 case R_ARM_THM_ABS5:
2870 /* Support ldr and str instructions for the thumb. */
2871 if (globals->use_rel)
2872 {
2873 /* Need to refetch addend. */
2874 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
2875 /* ??? Need to determine shift amount from operand size. */
2876 addend >>= howto->rightshift;
2877 }
2878 value += addend;
2879
2880 /* ??? Isn't value unsigned? */
2881 if ((long) value > 0x1f || (long) value < -0x10)
2882 return bfd_reloc_overflow;
2883
2884 /* ??? Value needs to be properly shifted into place first. */
2885 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
2886 bfd_put_16 (input_bfd, value, hit_data);
2887 return bfd_reloc_ok;
2888
2889 #ifndef OLD_ARM_ABI
2890 case R_ARM_THM_XPC22:
2891 #endif
2892 case R_ARM_THM_PC22:
2893 /* Thumb BL (branch long instruction). */
2894 {
2895 bfd_vma relocation;
2896 bfd_boolean overflow = FALSE;
2897 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
2898 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
2899 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
2900 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
2901 bfd_vma check;
2902 bfd_signed_vma signed_check;
2903 bfd_boolean thumb_plt_call = FALSE;
2904
2905 /* Need to refetch the addend and squish the two 11 bit pieces
2906 together. */
2907 if (globals->use_rel)
2908 {
2909 bfd_vma upper = upper_insn & 0x7ff;
2910 bfd_vma lower = lower_insn & 0x7ff;
2911 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
2912 addend = (upper << 12) | (lower << 1);
2913 signed_addend = addend;
2914 }
2915 #ifndef OLD_ARM_ABI
2916 if (r_type == R_ARM_THM_XPC22)
2917 {
2918 /* Check for Thumb to Thumb call. */
2919 /* FIXME: Should we translate the instruction into a BL
2920 instruction instead ? */
2921 if (sym_flags == STT_ARM_TFUNC)
2922 (*_bfd_error_handler)
2923 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
2924 input_bfd,
2925 h ? h->root.root.string : "(local)");
2926 }
2927 else
2928 #endif
2929 {
2930 /* If it is not a call to Thumb, assume call to Arm.
2931 If it is a call relative to a section name, then it is not a
2932 function call at all, but rather a long jump. Calls through
2933 the PLT do not require stubs. */
2934 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
2935 && (h == NULL || splt == NULL
2936 || h->plt.offset == (bfd_vma) -1))
2937 {
2938 if (elf32_thumb_to_arm_stub
2939 (info, sym_name, input_bfd, output_bfd, input_section,
2940 hit_data, sym_sec, rel->r_offset, signed_addend, value))
2941 return bfd_reloc_ok;
2942 else
2943 return bfd_reloc_dangerous;
2944 }
2945 }
2946
2947 /* Handle calls via the PLT. */
2948 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
2949 {
2950 value = (splt->output_section->vma
2951 + splt->output_offset
2952 + h->plt.offset);
2953 if (globals->use_blx)
2954 {
2955 /* If the Thumb BLX instruction is available, convert the
2956 BL to a BLX instruction to call the ARM-mode PLT entry. */
2957 if ((lower_insn & (0x3 << 11)) == 0x3 << 11)
2958 {
2959 lower_insn = (lower_insn & ~(0x3 << 11)) | 0x1 << 11;
2960 thumb_plt_call = TRUE;
2961 }
2962 }
2963 else
2964 /* Target the Thumb stub before the ARM PLT entry. */
2965 value -= PLT_THUMB_STUB_SIZE;
2966 *unresolved_reloc_p = FALSE;
2967 }
2968
2969 relocation = value + signed_addend;
2970
2971 relocation -= (input_section->output_section->vma
2972 + input_section->output_offset
2973 + rel->r_offset);
2974
2975 check = relocation >> howto->rightshift;
2976
2977 /* If this is a signed value, the rightshift just dropped
2978 leading 1 bits (assuming twos complement). */
2979 if ((bfd_signed_vma) relocation >= 0)
2980 signed_check = check;
2981 else
2982 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
2983
2984 /* Assumes two's complement. */
2985 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
2986 overflow = TRUE;
2987
2988 #ifndef OLD_ARM_ABI
2989 if ((r_type == R_ARM_THM_XPC22
2990 && ((lower_insn & 0x1800) == 0x0800))
2991 || thumb_plt_call)
2992 /* For a BLX instruction, make sure that the relocation is rounded up
2993 to a word boundary. This follows the semantics of the instruction
2994 which specifies that bit 1 of the target address will come from bit
2995 1 of the base address. */
2996 relocation = (relocation + 2) & ~ 3;
2997 #endif
2998 /* Put RELOCATION back into the insn. */
2999 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
3000 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
3001
3002 /* Put the relocated value back in the object file: */
3003 bfd_put_16 (input_bfd, upper_insn, hit_data);
3004 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3005
3006 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3007 }
3008 break;
3009
3010 case R_ARM_THM_PC11:
3011 case R_ARM_THM_PC9:
3012 /* Thumb B (branch) instruction). */
3013 {
3014 bfd_signed_vma relocation;
3015 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
3016 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3017 bfd_signed_vma signed_check;
3018
3019 if (globals->use_rel)
3020 {
3021 /* Need to refetch addend. */
3022 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3023 if (addend & ((howto->src_mask + 1) >> 1))
3024 {
3025 signed_addend = -1;
3026 signed_addend &= ~ howto->src_mask;
3027 signed_addend |= addend;
3028 }
3029 else
3030 signed_addend = addend;
3031 /* The value in the insn has been right shifted. We need to
3032 undo this, so that we can perform the address calculation
3033 in terms of bytes. */
3034 signed_addend <<= howto->rightshift;
3035 }
3036 relocation = value + signed_addend;
3037
3038 relocation -= (input_section->output_section->vma
3039 + input_section->output_offset
3040 + rel->r_offset);
3041
3042 relocation >>= howto->rightshift;
3043 signed_check = relocation;
3044 relocation &= howto->dst_mask;
3045 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
3046
3047 bfd_put_16 (input_bfd, relocation, hit_data);
3048
3049 /* Assumes two's complement. */
3050 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3051 return bfd_reloc_overflow;
3052
3053 return bfd_reloc_ok;
3054 }
3055
3056 #ifndef OLD_ARM_ABI
3057 case R_ARM_ALU_PCREL7_0:
3058 case R_ARM_ALU_PCREL15_8:
3059 case R_ARM_ALU_PCREL23_15:
3060 {
3061 bfd_vma insn;
3062 bfd_vma relocation;
3063
3064 insn = bfd_get_32 (input_bfd, hit_data);
3065 if (globals->use_rel)
3066 {
3067 /* Extract the addend. */
3068 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
3069 signed_addend = addend;
3070 }
3071 relocation = value + signed_addend;
3072
3073 relocation -= (input_section->output_section->vma
3074 + input_section->output_offset
3075 + rel->r_offset);
3076 insn = (insn & ~0xfff)
3077 | ((howto->bitpos << 7) & 0xf00)
3078 | ((relocation >> howto->bitpos) & 0xff);
3079 bfd_put_32 (input_bfd, value, hit_data);
3080 }
3081 return bfd_reloc_ok;
3082 #endif
3083
3084 case R_ARM_GNU_VTINHERIT:
3085 case R_ARM_GNU_VTENTRY:
3086 return bfd_reloc_ok;
3087
3088 case R_ARM_COPY:
3089 return bfd_reloc_notsupported;
3090
3091 case R_ARM_GLOB_DAT:
3092 return bfd_reloc_notsupported;
3093
3094 case R_ARM_JUMP_SLOT:
3095 return bfd_reloc_notsupported;
3096
3097 case R_ARM_RELATIVE:
3098 return bfd_reloc_notsupported;
3099
3100 case R_ARM_GOTOFF:
3101 /* Relocation is relative to the start of the
3102 global offset table. */
3103
3104 BFD_ASSERT (sgot != NULL);
3105 if (sgot == NULL)
3106 return bfd_reloc_notsupported;
3107
3108 /* If we are addressing a Thumb function, we need to adjust the
3109 address by one, so that attempts to call the function pointer will
3110 correctly interpret it as Thumb code. */
3111 if (sym_flags == STT_ARM_TFUNC)
3112 value += 1;
3113
3114 /* Note that sgot->output_offset is not involved in this
3115 calculation. We always want the start of .got. If we
3116 define _GLOBAL_OFFSET_TABLE in a different way, as is
3117 permitted by the ABI, we might have to change this
3118 calculation. */
3119 value -= sgot->output_section->vma;
3120 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3121 contents, rel->r_offset, value,
3122 (bfd_vma) 0);
3123
3124 case R_ARM_GOTPC:
3125 /* Use global offset table as symbol value. */
3126 BFD_ASSERT (sgot != NULL);
3127
3128 if (sgot == NULL)
3129 return bfd_reloc_notsupported;
3130
3131 *unresolved_reloc_p = FALSE;
3132 value = sgot->output_section->vma;
3133 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3134 contents, rel->r_offset, value,
3135 (bfd_vma) 0);
3136
3137 case R_ARM_GOT32:
3138 #ifndef OLD_ARM_ABI
3139 case R_ARM_GOT_PREL:
3140 #endif
3141 /* Relocation is to the entry for this symbol in the
3142 global offset table. */
3143 if (sgot == NULL)
3144 return bfd_reloc_notsupported;
3145
3146 if (h != NULL)
3147 {
3148 bfd_vma off;
3149 bfd_boolean dyn;
3150
3151 off = h->got.offset;
3152 BFD_ASSERT (off != (bfd_vma) -1);
3153 dyn = globals->root.dynamic_sections_created;
3154
3155 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3156 || (info->shared
3157 && SYMBOL_REFERENCES_LOCAL (info, h))
3158 || (ELF_ST_VISIBILITY (h->other)
3159 && h->root.type == bfd_link_hash_undefweak))
3160 {
3161 /* This is actually a static link, or it is a -Bsymbolic link
3162 and the symbol is defined locally. We must initialize this
3163 entry in the global offset table. Since the offset must
3164 always be a multiple of 4, we use the least significant bit
3165 to record whether we have initialized it already.
3166
3167 When doing a dynamic link, we create a .rel.got relocation
3168 entry to initialize the value. This is done in the
3169 finish_dynamic_symbol routine. */
3170 if ((off & 1) != 0)
3171 off &= ~1;
3172 else
3173 {
3174 /* If we are addressing a Thumb function, we need to
3175 adjust the address by one, so that attempts to
3176 call the function pointer will correctly
3177 interpret it as Thumb code. */
3178 if (sym_flags == STT_ARM_TFUNC)
3179 value |= 1;
3180
3181 bfd_put_32 (output_bfd, value, sgot->contents + off);
3182 h->got.offset |= 1;
3183 }
3184 }
3185 else
3186 *unresolved_reloc_p = FALSE;
3187
3188 value = sgot->output_offset + off;
3189 }
3190 else
3191 {
3192 bfd_vma off;
3193
3194 BFD_ASSERT (local_got_offsets != NULL &&
3195 local_got_offsets[r_symndx] != (bfd_vma) -1);
3196
3197 off = local_got_offsets[r_symndx];
3198
3199 /* The offset must always be a multiple of 4. We use the
3200 least significant bit to record whether we have already
3201 generated the necessary reloc. */
3202 if ((off & 1) != 0)
3203 off &= ~1;
3204 else
3205 {
3206 /* If we are addressing a Thumb function, we need to
3207 adjust the address by one, so that attempts to
3208 call the function pointer will correctly
3209 interpret it as Thumb code. */
3210 if (sym_flags == STT_ARM_TFUNC)
3211 value |= 1;
3212
3213 bfd_put_32 (output_bfd, value, sgot->contents + off);
3214
3215 if (info->shared)
3216 {
3217 asection * srelgot;
3218 Elf_Internal_Rela outrel;
3219 bfd_byte *loc;
3220
3221 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
3222 BFD_ASSERT (srelgot != NULL);
3223
3224 outrel.r_offset = (sgot->output_section->vma
3225 + sgot->output_offset
3226 + off);
3227 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3228 loc = srelgot->contents;
3229 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3230 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3231 }
3232
3233 local_got_offsets[r_symndx] |= 1;
3234 }
3235
3236 value = sgot->output_offset + off;
3237 }
3238 if (r_type != R_ARM_GOT32)
3239 value += sgot->output_section->vma;
3240
3241 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3242 contents, rel->r_offset, value,
3243 (bfd_vma) 0);
3244
3245 case R_ARM_TLS_LDO32:
3246 value = value - dtpoff_base (info);
3247
3248 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3249 contents, rel->r_offset, value, (bfd_vma) 0);
3250
3251 case R_ARM_TLS_LDM32:
3252 {
3253 bfd_vma off;
3254
3255 if (globals->sgot == NULL)
3256 abort ();
3257
3258 off = globals->tls_ldm_got.offset;
3259
3260 if ((off & 1) != 0)
3261 off &= ~1;
3262 else
3263 {
3264 /* If we don't know the module number, create a relocation
3265 for it. */
3266 if (info->shared)
3267 {
3268 Elf_Internal_Rela outrel;
3269 bfd_byte *loc;
3270
3271 if (globals->srelgot == NULL)
3272 abort ();
3273
3274 outrel.r_offset = (globals->sgot->output_section->vma
3275 + globals->sgot->output_offset + off);
3276 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
3277
3278 bfd_put_32 (output_bfd, 0, globals->sgot->contents + off);
3279
3280 loc = globals->srelgot->contents;
3281 loc += globals->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3282 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3283 }
3284 else
3285 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
3286
3287 globals->tls_ldm_got.offset |= 1;
3288 }
3289
3290 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3291 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3292
3293 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3294 contents, rel->r_offset, value,
3295 (bfd_vma) 0);
3296 }
3297
3298 case R_ARM_TLS_GD32:
3299 case R_ARM_TLS_IE32:
3300 {
3301 bfd_vma off;
3302 int indx;
3303 char tls_type;
3304
3305 if (globals->sgot == NULL)
3306 abort ();
3307
3308 indx = 0;
3309 if (h != NULL)
3310 {
3311 bfd_boolean dyn;
3312 dyn = globals->root.dynamic_sections_created;
3313 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3314 && (!info->shared
3315 || !SYMBOL_REFERENCES_LOCAL (info, h)))
3316 {
3317 *unresolved_reloc_p = FALSE;
3318 indx = h->dynindx;
3319 }
3320 off = h->got.offset;
3321 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
3322 }
3323 else
3324 {
3325 if (local_got_offsets == NULL)
3326 abort ();
3327 off = local_got_offsets[r_symndx];
3328 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
3329 }
3330
3331 if (tls_type == GOT_UNKNOWN)
3332 abort ();
3333
3334 if ((off & 1) != 0)
3335 off &= ~1;
3336 else
3337 {
3338 bfd_boolean need_relocs = FALSE;
3339 Elf_Internal_Rela outrel;
3340 bfd_byte *loc = NULL;
3341 int cur_off = off;
3342
3343 /* The GOT entries have not been initialized yet. Do it
3344 now, and emit any relocations. If both an IE GOT and a
3345 GD GOT are necessary, we emit the GD first. */
3346
3347 if ((info->shared || indx != 0)
3348 && (h == NULL
3349 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3350 || h->root.type != bfd_link_hash_undefweak))
3351 {
3352 need_relocs = TRUE;
3353 if (globals->srelgot == NULL)
3354 abort ();
3355 loc = globals->srelgot->contents;
3356 loc += globals->srelgot->reloc_count * sizeof (Elf32_External_Rel);
3357 }
3358
3359 if (tls_type & GOT_TLS_GD)
3360 {
3361 if (need_relocs)
3362 {
3363 outrel.r_offset = (globals->sgot->output_section->vma
3364 + globals->sgot->output_offset + cur_off);
3365 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
3366 bfd_put_32 (output_bfd, 0, globals->sgot->contents + cur_off);
3367
3368 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3369 globals->srelgot->reloc_count++;
3370 loc += sizeof (Elf32_External_Rel);
3371
3372 if (indx == 0)
3373 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3374 globals->sgot->contents + cur_off + 4);
3375 else
3376 {
3377 bfd_put_32 (output_bfd, 0,
3378 globals->sgot->contents + cur_off + 4);
3379
3380 outrel.r_info = ELF32_R_INFO (indx,
3381 R_ARM_TLS_DTPOFF32);
3382 outrel.r_offset += 4;
3383 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3384 globals->srelgot->reloc_count++;
3385 loc += sizeof (Elf32_External_Rel);
3386 }
3387 }
3388 else
3389 {
3390 /* If we are not emitting relocations for a
3391 general dynamic reference, then we must be in a
3392 static link or an executable link with the
3393 symbol binding locally. Mark it as belonging
3394 to module 1, the executable. */
3395 bfd_put_32 (output_bfd, 1,
3396 globals->sgot->contents + cur_off);
3397 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3398 globals->sgot->contents + cur_off + 4);
3399 }
3400
3401 cur_off += 8;
3402 }
3403
3404 if (tls_type & GOT_TLS_IE)
3405 {
3406 if (need_relocs)
3407 {
3408 outrel.r_offset = (globals->sgot->output_section->vma
3409 + globals->sgot->output_offset
3410 + cur_off);
3411 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
3412
3413 if (indx == 0)
3414 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3415 globals->sgot->contents + cur_off);
3416 else
3417 bfd_put_32 (output_bfd, 0,
3418 globals->sgot->contents + cur_off);
3419
3420 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3421 globals->srelgot->reloc_count++;
3422 loc += sizeof (Elf32_External_Rel);
3423 }
3424 else
3425 bfd_put_32 (output_bfd, tpoff (info, value),
3426 globals->sgot->contents + cur_off);
3427 cur_off += 4;
3428 }
3429
3430 if (h != NULL)
3431 h->got.offset |= 1;
3432 else
3433 local_got_offsets[r_symndx] |= 1;
3434 }
3435
3436 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
3437 off += 8;
3438 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3439 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3440
3441 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3442 contents, rel->r_offset, value,
3443 (bfd_vma) 0);
3444 }
3445
3446 case R_ARM_TLS_LE32:
3447 if (info->shared)
3448 {
3449 (*_bfd_error_handler)
3450 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
3451 input_bfd, input_section,
3452 (long) rel->r_offset, howto->name);
3453 return FALSE;
3454 }
3455 else
3456 value = tpoff (info, value);
3457
3458 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3459 contents, rel->r_offset, value, (bfd_vma) 0);
3460
3461 case R_ARM_SBREL32:
3462 return bfd_reloc_notsupported;
3463
3464 case R_ARM_AMP_VCALL9:
3465 return bfd_reloc_notsupported;
3466
3467 case R_ARM_RSBREL32:
3468 return bfd_reloc_notsupported;
3469
3470 case R_ARM_THM_RPC22:
3471 return bfd_reloc_notsupported;
3472
3473 case R_ARM_RREL32:
3474 return bfd_reloc_notsupported;
3475
3476 case R_ARM_RABS32:
3477 return bfd_reloc_notsupported;
3478
3479 case R_ARM_RPC24:
3480 return bfd_reloc_notsupported;
3481
3482 case R_ARM_RBASE:
3483 return bfd_reloc_notsupported;
3484
3485 case R_ARM_V4BX:
3486 if (globals->fix_v4bx)
3487 {
3488 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
3489
3490 /* Ensure that we have a BX instruction. */
3491 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
3492
3493 /* Preserve Rm (lowest four bits) and the condition code
3494 (highest four bits). Other bits encode MOV PC,Rm. */
3495 insn = (insn & 0xf000000f) | 0x01a0f000;
3496
3497 bfd_put_32 (input_bfd, insn, hit_data);
3498 }
3499 return bfd_reloc_ok;
3500
3501 default:
3502 return bfd_reloc_notsupported;
3503 }
3504 }
3505
3506 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
3507 static void
3508 arm_add_to_rel (bfd * abfd,
3509 bfd_byte * address,
3510 reloc_howto_type * howto,
3511 bfd_signed_vma increment)
3512 {
3513 bfd_signed_vma addend;
3514
3515 if (howto->type == R_ARM_THM_PC22)
3516 {
3517 int upper_insn, lower_insn;
3518 int upper, lower;
3519
3520 upper_insn = bfd_get_16 (abfd, address);
3521 lower_insn = bfd_get_16 (abfd, address + 2);
3522 upper = upper_insn & 0x7ff;
3523 lower = lower_insn & 0x7ff;
3524
3525 addend = (upper << 12) | (lower << 1);
3526 addend += increment;
3527 addend >>= 1;
3528
3529 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3530 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3531
3532 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3533 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3534 }
3535 else
3536 {
3537 bfd_vma contents;
3538
3539 contents = bfd_get_32 (abfd, address);
3540
3541 /* Get the (signed) value from the instruction. */
3542 addend = contents & howto->src_mask;
3543 if (addend & ((howto->src_mask + 1) >> 1))
3544 {
3545 bfd_signed_vma mask;
3546
3547 mask = -1;
3548 mask &= ~ howto->src_mask;
3549 addend |= mask;
3550 }
3551
3552 /* Add in the increment, (which is a byte value). */
3553 switch (howto->type)
3554 {
3555 default:
3556 addend += increment;
3557 break;
3558
3559 case R_ARM_PC24:
3560 #ifndef OLD_ARM_ABI
3561 case R_ARM_CALL:
3562 case R_ARM_JUMP24:
3563 #endif
3564 addend <<= howto->size;
3565 addend += increment;
3566
3567 /* Should we check for overflow here ? */
3568
3569 /* Drop any undesired bits. */
3570 addend >>= howto->rightshift;
3571 break;
3572 }
3573
3574 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3575
3576 bfd_put_32 (abfd, contents, address);
3577 }
3578 }
3579
3580 #define IS_ARM_TLS_RELOC(R_TYPE) \
3581 ((R_TYPE) == R_ARM_TLS_GD32 \
3582 || (R_TYPE) == R_ARM_TLS_LDO32 \
3583 || (R_TYPE) == R_ARM_TLS_LDM32 \
3584 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
3585 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
3586 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
3587 || (R_TYPE) == R_ARM_TLS_LE32 \
3588 || (R_TYPE) == R_ARM_TLS_IE32)
3589
3590 /* Relocate an ARM ELF section. */
3591 static bfd_boolean
3592 elf32_arm_relocate_section (bfd * output_bfd,
3593 struct bfd_link_info * info,
3594 bfd * input_bfd,
3595 asection * input_section,
3596 bfd_byte * contents,
3597 Elf_Internal_Rela * relocs,
3598 Elf_Internal_Sym * local_syms,
3599 asection ** local_sections)
3600 {
3601 Elf_Internal_Shdr *symtab_hdr;
3602 struct elf_link_hash_entry **sym_hashes;
3603 Elf_Internal_Rela *rel;
3604 Elf_Internal_Rela *relend;
3605 const char *name;
3606 struct elf32_arm_link_hash_table * globals;
3607
3608 globals = elf32_arm_hash_table (info);
3609 if (info->relocatable && !globals->use_rel)
3610 return TRUE;
3611
3612 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3613 sym_hashes = elf_sym_hashes (input_bfd);
3614
3615 rel = relocs;
3616 relend = relocs + input_section->reloc_count;
3617 for (; rel < relend; rel++)
3618 {
3619 int r_type;
3620 reloc_howto_type * howto;
3621 unsigned long r_symndx;
3622 Elf_Internal_Sym * sym;
3623 asection * sec;
3624 struct elf_link_hash_entry * h;
3625 bfd_vma relocation;
3626 bfd_reloc_status_type r;
3627 arelent bfd_reloc;
3628 char sym_type;
3629 bfd_boolean unresolved_reloc = FALSE;
3630
3631 r_symndx = ELF32_R_SYM (rel->r_info);
3632 r_type = ELF32_R_TYPE (rel->r_info);
3633 r_type = arm_real_reloc_type (globals, r_type);
3634
3635 if ( r_type == R_ARM_GNU_VTENTRY
3636 || r_type == R_ARM_GNU_VTINHERIT)
3637 continue;
3638
3639 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
3640 howto = bfd_reloc.howto;
3641
3642 if (info->relocatable && globals->use_rel)
3643 {
3644 /* This is a relocatable link. We don't have to change
3645 anything, unless the reloc is against a section symbol,
3646 in which case we have to adjust according to where the
3647 section symbol winds up in the output section. */
3648 if (r_symndx < symtab_hdr->sh_info)
3649 {
3650 sym = local_syms + r_symndx;
3651 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3652 {
3653 sec = local_sections[r_symndx];
3654 arm_add_to_rel (input_bfd, contents + rel->r_offset,
3655 howto,
3656 (bfd_signed_vma) (sec->output_offset
3657 + sym->st_value));
3658 }
3659 }
3660
3661 continue;
3662 }
3663
3664 /* This is a final link. */
3665 h = NULL;
3666 sym = NULL;
3667 sec = NULL;
3668
3669 if (r_symndx < symtab_hdr->sh_info)
3670 {
3671 sym = local_syms + r_symndx;
3672 sym_type = ELF32_ST_TYPE (sym->st_info);
3673 sec = local_sections[r_symndx];
3674 if (globals->use_rel)
3675 {
3676 relocation = (sec->output_section->vma
3677 + sec->output_offset
3678 + sym->st_value);
3679 if ((sec->flags & SEC_MERGE)
3680 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3681 {
3682 asection *msec;
3683 bfd_vma addend, value;
3684
3685 if (howto->rightshift)
3686 {
3687 (*_bfd_error_handler)
3688 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
3689 input_bfd, input_section,
3690 (long) rel->r_offset, howto->name);
3691 return FALSE;
3692 }
3693
3694 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
3695
3696 /* Get the (signed) value from the instruction. */
3697 addend = value & howto->src_mask;
3698 if (addend & ((howto->src_mask + 1) >> 1))
3699 {
3700 bfd_signed_vma mask;
3701
3702 mask = -1;
3703 mask &= ~ howto->src_mask;
3704 addend |= mask;
3705 }
3706 msec = sec;
3707 addend =
3708 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
3709 - relocation;
3710 addend += msec->output_section->vma + msec->output_offset;
3711 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
3712 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
3713 }
3714 }
3715 else
3716 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3717 }
3718 else
3719 {
3720 bfd_boolean warned;
3721
3722 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3723 r_symndx, symtab_hdr, sym_hashes,
3724 h, sec, relocation,
3725 unresolved_reloc, warned);
3726
3727 sym_type = h->type;
3728 }
3729
3730 if (h != NULL)
3731 name = h->root.root.string;
3732 else
3733 {
3734 name = (bfd_elf_string_from_elf_section
3735 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3736 if (name == NULL || *name == '\0')
3737 name = bfd_section_name (input_bfd, sec);
3738 }
3739
3740 if (r_symndx != 0
3741 && r_type != R_ARM_NONE
3742 && (h == NULL
3743 || h->root.type == bfd_link_hash_defined
3744 || h->root.type == bfd_link_hash_defweak)
3745 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
3746 {
3747 (*_bfd_error_handler)
3748 ((sym_type == STT_TLS
3749 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
3750 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
3751 input_bfd,
3752 input_section,
3753 (long) rel->r_offset,
3754 howto->name,
3755 name);
3756 }
3757
3758 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
3759 input_section, contents, rel,
3760 relocation, info, sec, name,
3761 (h ? ELF_ST_TYPE (h->type) :
3762 ELF_ST_TYPE (sym->st_info)), h,
3763 &unresolved_reloc);
3764
3765 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3766 because such sections are not SEC_ALLOC and thus ld.so will
3767 not process them. */
3768 if (unresolved_reloc
3769 && !((input_section->flags & SEC_DEBUGGING) != 0
3770 && h->def_dynamic))
3771 {
3772 (*_bfd_error_handler)
3773 (_("%B(%A+0x%lx): warning: unresolvable relocation %d against symbol `%s'"),
3774 input_bfd, input_section, (long) rel->r_offset,
3775 r_type, h->root.root.string);
3776 return FALSE;
3777 }
3778
3779 if (r != bfd_reloc_ok)
3780 {
3781 const char * msg = (const char *) 0;
3782
3783 switch (r)
3784 {
3785 case bfd_reloc_overflow:
3786 /* If the overflowing reloc was to an undefined symbol,
3787 we have already printed one error message and there
3788 is no point complaining again. */
3789 if ((! h ||
3790 h->root.type != bfd_link_hash_undefined)
3791 && (!((*info->callbacks->reloc_overflow)
3792 (info, (h ? &h->root : NULL), name, howto->name,
3793 (bfd_vma) 0, input_bfd, input_section,
3794 rel->r_offset))))
3795 return FALSE;
3796 break;
3797
3798 case bfd_reloc_undefined:
3799 if (!((*info->callbacks->undefined_symbol)
3800 (info, name, input_bfd, input_section,
3801 rel->r_offset, TRUE)))
3802 return FALSE;
3803 break;
3804
3805 case bfd_reloc_outofrange:
3806 msg = _("internal error: out of range error");
3807 goto common_error;
3808
3809 case bfd_reloc_notsupported:
3810 msg = _("internal error: unsupported relocation error");
3811 goto common_error;
3812
3813 case bfd_reloc_dangerous:
3814 msg = _("internal error: dangerous error");
3815 goto common_error;
3816
3817 default:
3818 msg = _("internal error: unknown error");
3819 /* fall through */
3820
3821 common_error:
3822 if (!((*info->callbacks->warning)
3823 (info, msg, name, input_bfd, input_section,
3824 rel->r_offset)))
3825 return FALSE;
3826 break;
3827 }
3828 }
3829 }
3830
3831 return TRUE;
3832 }
3833
3834 /* Set the right machine number. */
3835
3836 static bfd_boolean
3837 elf32_arm_object_p (bfd *abfd)
3838 {
3839 unsigned int mach;
3840
3841 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
3842
3843 if (mach != bfd_mach_arm_unknown)
3844 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3845
3846 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
3847 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
3848
3849 else
3850 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
3851
3852 return TRUE;
3853 }
3854
3855 /* Function to keep ARM specific flags in the ELF header. */
3856
3857 static bfd_boolean
3858 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
3859 {
3860 if (elf_flags_init (abfd)
3861 && elf_elfheader (abfd)->e_flags != flags)
3862 {
3863 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
3864 {
3865 if (flags & EF_ARM_INTERWORK)
3866 (*_bfd_error_handler)
3867 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
3868 abfd);
3869 else
3870 _bfd_error_handler
3871 (_("Warning: Clearing the interworking flag of %B due to outside request"),
3872 abfd);
3873 }
3874 }
3875 else
3876 {
3877 elf_elfheader (abfd)->e_flags = flags;
3878 elf_flags_init (abfd) = TRUE;
3879 }
3880
3881 return TRUE;
3882 }
3883
3884 /* Copy backend specific data from one object module to another. */
3885
3886 static bfd_boolean
3887 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3888 {
3889 flagword in_flags;
3890 flagword out_flags;
3891
3892 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3893 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3894 return TRUE;
3895
3896 in_flags = elf_elfheader (ibfd)->e_flags;
3897 out_flags = elf_elfheader (obfd)->e_flags;
3898
3899 if (elf_flags_init (obfd)
3900 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
3901 && in_flags != out_flags)
3902 {
3903 /* Cannot mix APCS26 and APCS32 code. */
3904 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
3905 return FALSE;
3906
3907 /* Cannot mix float APCS and non-float APCS code. */
3908 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
3909 return FALSE;
3910
3911 /* If the src and dest have different interworking flags
3912 then turn off the interworking bit. */
3913 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
3914 {
3915 if (out_flags & EF_ARM_INTERWORK)
3916 _bfd_error_handler
3917 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
3918 obfd, ibfd);
3919
3920 in_flags &= ~EF_ARM_INTERWORK;
3921 }
3922
3923 /* Likewise for PIC, though don't warn for this case. */
3924 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
3925 in_flags &= ~EF_ARM_PIC;
3926 }
3927
3928 elf_elfheader (obfd)->e_flags = in_flags;
3929 elf_flags_init (obfd) = TRUE;
3930
3931 /* Also copy the EI_OSABI field. */
3932 elf_elfheader (obfd)->e_ident[EI_OSABI] =
3933 elf_elfheader (ibfd)->e_ident[EI_OSABI];
3934
3935 return TRUE;
3936 }
3937
3938 /* Merge backend specific data from an object file to the output
3939 object file when linking. */
3940
3941 static bfd_boolean
3942 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
3943 {
3944 flagword out_flags;
3945 flagword in_flags;
3946 bfd_boolean flags_compatible = TRUE;
3947 asection *sec;
3948
3949 /* Check if we have the same endianess. */
3950 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3951 return FALSE;
3952
3953 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3954 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3955 return TRUE;
3956
3957 /* The input BFD must have had its flags initialised. */
3958 /* The following seems bogus to me -- The flags are initialized in
3959 the assembler but I don't think an elf_flags_init field is
3960 written into the object. */
3961 /* BFD_ASSERT (elf_flags_init (ibfd)); */
3962
3963 in_flags = elf_elfheader (ibfd)->e_flags;
3964 out_flags = elf_elfheader (obfd)->e_flags;
3965
3966 if (!elf_flags_init (obfd))
3967 {
3968 /* If the input is the default architecture and had the default
3969 flags then do not bother setting the flags for the output
3970 architecture, instead allow future merges to do this. If no
3971 future merges ever set these flags then they will retain their
3972 uninitialised values, which surprise surprise, correspond
3973 to the default values. */
3974 if (bfd_get_arch_info (ibfd)->the_default
3975 && elf_elfheader (ibfd)->e_flags == 0)
3976 return TRUE;
3977
3978 elf_flags_init (obfd) = TRUE;
3979 elf_elfheader (obfd)->e_flags = in_flags;
3980
3981 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3982 && bfd_get_arch_info (obfd)->the_default)
3983 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3984
3985 return TRUE;
3986 }
3987
3988 /* Determine what should happen if the input ARM architecture
3989 does not match the output ARM architecture. */
3990 if (! bfd_arm_merge_machines (ibfd, obfd))
3991 return FALSE;
3992
3993 /* Identical flags must be compatible. */
3994 if (in_flags == out_flags)
3995 return TRUE;
3996
3997 /* Check to see if the input BFD actually contains any sections. If
3998 not, its flags may not have been initialised either, but it
3999 cannot actually cause any incompatibility. Do not short-circuit
4000 dynamic objects; their section list may be emptied by
4001 elf_link_add_object_symbols.
4002
4003 Also check to see if there are no code sections in the input.
4004 In this case there is no need to check for code specific flags.
4005 XXX - do we need to worry about floating-point format compatability
4006 in data sections ? */
4007 if (!(ibfd->flags & DYNAMIC))
4008 {
4009 bfd_boolean null_input_bfd = TRUE;
4010 bfd_boolean only_data_sections = TRUE;
4011
4012 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4013 {
4014 /* Ignore synthetic glue sections. */
4015 if (strcmp (sec->name, ".glue_7")
4016 && strcmp (sec->name, ".glue_7t"))
4017 {
4018 if ((bfd_get_section_flags (ibfd, sec)
4019 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4020 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4021 only_data_sections = FALSE;
4022
4023 null_input_bfd = FALSE;
4024 break;
4025 }
4026 }
4027
4028 if (null_input_bfd || only_data_sections)
4029 return TRUE;
4030 }
4031
4032 /* Complain about various flag mismatches. */
4033 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
4034 {
4035 _bfd_error_handler
4036 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
4037 ibfd, obfd,
4038 (in_flags & EF_ARM_EABIMASK) >> 24,
4039 (out_flags & EF_ARM_EABIMASK) >> 24);
4040 return FALSE;
4041 }
4042
4043 /* Not sure what needs to be checked for EABI versions >= 1. */
4044 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
4045 {
4046 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
4047 {
4048 _bfd_error_handler
4049 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
4050 ibfd, obfd,
4051 in_flags & EF_ARM_APCS_26 ? 26 : 32,
4052 out_flags & EF_ARM_APCS_26 ? 26 : 32);
4053 flags_compatible = FALSE;
4054 }
4055
4056 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
4057 {
4058 if (in_flags & EF_ARM_APCS_FLOAT)
4059 _bfd_error_handler
4060 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
4061 ibfd, obfd);
4062 else
4063 _bfd_error_handler
4064 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
4065 ibfd, obfd);
4066
4067 flags_compatible = FALSE;
4068 }
4069
4070 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
4071 {
4072 if (in_flags & EF_ARM_VFP_FLOAT)
4073 _bfd_error_handler
4074 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
4075 ibfd, obfd);
4076 else
4077 _bfd_error_handler
4078 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
4079 ibfd, obfd);
4080
4081 flags_compatible = FALSE;
4082 }
4083
4084 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
4085 {
4086 if (in_flags & EF_ARM_MAVERICK_FLOAT)
4087 _bfd_error_handler
4088 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
4089 ibfd, obfd);
4090 else
4091 _bfd_error_handler
4092 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
4093 ibfd, obfd);
4094
4095 flags_compatible = FALSE;
4096 }
4097
4098 #ifdef EF_ARM_SOFT_FLOAT
4099 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
4100 {
4101 /* We can allow interworking between code that is VFP format
4102 layout, and uses either soft float or integer regs for
4103 passing floating point arguments and results. We already
4104 know that the APCS_FLOAT flags match; similarly for VFP
4105 flags. */
4106 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
4107 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
4108 {
4109 if (in_flags & EF_ARM_SOFT_FLOAT)
4110 _bfd_error_handler
4111 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
4112 ibfd, obfd);
4113 else
4114 _bfd_error_handler
4115 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
4116 ibfd, obfd);
4117
4118 flags_compatible = FALSE;
4119 }
4120 }
4121 #endif
4122
4123 /* Interworking mismatch is only a warning. */
4124 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
4125 {
4126 if (in_flags & EF_ARM_INTERWORK)
4127 {
4128 _bfd_error_handler
4129 (_("Warning: %B supports interworking, whereas %B does not"),
4130 ibfd, obfd);
4131 }
4132 else
4133 {
4134 _bfd_error_handler
4135 (_("Warning: %B does not support interworking, whereas %B does"),
4136 ibfd, obfd);
4137 }
4138 }
4139 }
4140
4141 return flags_compatible;
4142 }
4143
4144 /* Display the flags field. */
4145
4146 static bfd_boolean
4147 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
4148 {
4149 FILE * file = (FILE *) ptr;
4150 unsigned long flags;
4151
4152 BFD_ASSERT (abfd != NULL && ptr != NULL);
4153
4154 /* Print normal ELF private data. */
4155 _bfd_elf_print_private_bfd_data (abfd, ptr);
4156
4157 flags = elf_elfheader (abfd)->e_flags;
4158 /* Ignore init flag - it may not be set, despite the flags field
4159 containing valid data. */
4160
4161 /* xgettext:c-format */
4162 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4163
4164 switch (EF_ARM_EABI_VERSION (flags))
4165 {
4166 case EF_ARM_EABI_UNKNOWN:
4167 /* The following flag bits are GNU extensions and not part of the
4168 official ARM ELF extended ABI. Hence they are only decoded if
4169 the EABI version is not set. */
4170 if (flags & EF_ARM_INTERWORK)
4171 fprintf (file, _(" [interworking enabled]"));
4172
4173 if (flags & EF_ARM_APCS_26)
4174 fprintf (file, " [APCS-26]");
4175 else
4176 fprintf (file, " [APCS-32]");
4177
4178 if (flags & EF_ARM_VFP_FLOAT)
4179 fprintf (file, _(" [VFP float format]"));
4180 else if (flags & EF_ARM_MAVERICK_FLOAT)
4181 fprintf (file, _(" [Maverick float format]"));
4182 else
4183 fprintf (file, _(" [FPA float format]"));
4184
4185 if (flags & EF_ARM_APCS_FLOAT)
4186 fprintf (file, _(" [floats passed in float registers]"));
4187
4188 if (flags & EF_ARM_PIC)
4189 fprintf (file, _(" [position independent]"));
4190
4191 if (flags & EF_ARM_NEW_ABI)
4192 fprintf (file, _(" [new ABI]"));
4193
4194 if (flags & EF_ARM_OLD_ABI)
4195 fprintf (file, _(" [old ABI]"));
4196
4197 if (flags & EF_ARM_SOFT_FLOAT)
4198 fprintf (file, _(" [software FP]"));
4199
4200 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
4201 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
4202 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
4203 | EF_ARM_MAVERICK_FLOAT);
4204 break;
4205
4206 case EF_ARM_EABI_VER1:
4207 fprintf (file, _(" [Version1 EABI]"));
4208
4209 if (flags & EF_ARM_SYMSARESORTED)
4210 fprintf (file, _(" [sorted symbol table]"));
4211 else
4212 fprintf (file, _(" [unsorted symbol table]"));
4213
4214 flags &= ~ EF_ARM_SYMSARESORTED;
4215 break;
4216
4217 case EF_ARM_EABI_VER2:
4218 fprintf (file, _(" [Version2 EABI]"));
4219
4220 if (flags & EF_ARM_SYMSARESORTED)
4221 fprintf (file, _(" [sorted symbol table]"));
4222 else
4223 fprintf (file, _(" [unsorted symbol table]"));
4224
4225 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
4226 fprintf (file, _(" [dynamic symbols use segment index]"));
4227
4228 if (flags & EF_ARM_MAPSYMSFIRST)
4229 fprintf (file, _(" [mapping symbols precede others]"));
4230
4231 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
4232 | EF_ARM_MAPSYMSFIRST);
4233 break;
4234
4235 case EF_ARM_EABI_VER3:
4236 fprintf (file, _(" [Version3 EABI]"));
4237 break;
4238
4239 case EF_ARM_EABI_VER4:
4240 fprintf (file, _(" [Version4 EABI]"));
4241
4242 if (flags & EF_ARM_BE8)
4243 fprintf (file, _(" [BE8]"));
4244
4245 if (flags & EF_ARM_LE8)
4246 fprintf (file, _(" [LE8]"));
4247
4248 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
4249 break;
4250
4251 default:
4252 fprintf (file, _(" <EABI version unrecognised>"));
4253 break;
4254 }
4255
4256 flags &= ~ EF_ARM_EABIMASK;
4257
4258 if (flags & EF_ARM_RELEXEC)
4259 fprintf (file, _(" [relocatable executable]"));
4260
4261 if (flags & EF_ARM_HASENTRY)
4262 fprintf (file, _(" [has entry point]"));
4263
4264 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
4265
4266 if (flags)
4267 fprintf (file, _("<Unrecognised flag bits set>"));
4268
4269 fputc ('\n', file);
4270
4271 return TRUE;
4272 }
4273
4274 static int
4275 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
4276 {
4277 switch (ELF_ST_TYPE (elf_sym->st_info))
4278 {
4279 case STT_ARM_TFUNC:
4280 return ELF_ST_TYPE (elf_sym->st_info);
4281
4282 case STT_ARM_16BIT:
4283 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
4284 This allows us to distinguish between data used by Thumb instructions
4285 and non-data (which is probably code) inside Thumb regions of an
4286 executable. */
4287 if (type != STT_OBJECT)
4288 return ELF_ST_TYPE (elf_sym->st_info);
4289 break;
4290
4291 default:
4292 break;
4293 }
4294
4295 return type;
4296 }
4297
4298 static asection *
4299 elf32_arm_gc_mark_hook (asection * sec,
4300 struct bfd_link_info * info ATTRIBUTE_UNUSED,
4301 Elf_Internal_Rela * rel,
4302 struct elf_link_hash_entry * h,
4303 Elf_Internal_Sym * sym)
4304 {
4305 if (h != NULL)
4306 {
4307 switch (ELF32_R_TYPE (rel->r_info))
4308 {
4309 case R_ARM_GNU_VTINHERIT:
4310 case R_ARM_GNU_VTENTRY:
4311 break;
4312
4313 default:
4314 switch (h->root.type)
4315 {
4316 case bfd_link_hash_defined:
4317 case bfd_link_hash_defweak:
4318 return h->root.u.def.section;
4319
4320 case bfd_link_hash_common:
4321 return h->root.u.c.p->section;
4322
4323 default:
4324 break;
4325 }
4326 }
4327 }
4328 else
4329 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4330
4331 return NULL;
4332 }
4333
4334 /* Update the got entry reference counts for the section being removed. */
4335
4336 static bfd_boolean
4337 elf32_arm_gc_sweep_hook (bfd * abfd,
4338 struct bfd_link_info * info,
4339 asection * sec,
4340 const Elf_Internal_Rela * relocs)
4341 {
4342 Elf_Internal_Shdr *symtab_hdr;
4343 struct elf_link_hash_entry **sym_hashes;
4344 bfd_signed_vma *local_got_refcounts;
4345 const Elf_Internal_Rela *rel, *relend;
4346 struct elf32_arm_link_hash_table * globals;
4347
4348 globals = elf32_arm_hash_table (info);
4349
4350 elf_section_data (sec)->local_dynrel = NULL;
4351
4352 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4353 sym_hashes = elf_sym_hashes (abfd);
4354 local_got_refcounts = elf_local_got_refcounts (abfd);
4355
4356 relend = relocs + sec->reloc_count;
4357 for (rel = relocs; rel < relend; rel++)
4358 {
4359 unsigned long r_symndx;
4360 struct elf_link_hash_entry *h = NULL;
4361 int r_type;
4362
4363 r_symndx = ELF32_R_SYM (rel->r_info);
4364 if (r_symndx >= symtab_hdr->sh_info)
4365 {
4366 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4367 while (h->root.type == bfd_link_hash_indirect
4368 || h->root.type == bfd_link_hash_warning)
4369 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4370 }
4371
4372 r_type = ELF32_R_TYPE (rel->r_info);
4373 #ifndef OLD_ARM_ABI
4374 r_type = arm_real_reloc_type (globals, r_type);
4375 #endif
4376 switch (r_type)
4377 {
4378 case R_ARM_GOT32:
4379 #ifndef OLD_ARM_ABI
4380 case R_ARM_GOT_PREL:
4381 #endif
4382 case R_ARM_TLS_GD32:
4383 case R_ARM_TLS_IE32:
4384 if (h != NULL)
4385 {
4386 if (h->got.refcount > 0)
4387 h->got.refcount -= 1;
4388 }
4389 else if (local_got_refcounts != NULL)
4390 {
4391 if (local_got_refcounts[r_symndx] > 0)
4392 local_got_refcounts[r_symndx] -= 1;
4393 }
4394 break;
4395
4396 case R_ARM_TLS_LDM32:
4397 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
4398 break;
4399
4400 case R_ARM_ABS32:
4401 case R_ARM_REL32:
4402 case R_ARM_PC24:
4403 case R_ARM_PLT32:
4404 #ifndef OLD_ARM_ABI
4405 case R_ARM_CALL:
4406 case R_ARM_JUMP24:
4407 case R_ARM_PREL31:
4408 #endif
4409 case R_ARM_THM_PC22:
4410 /* Should the interworking branches be here also? */
4411
4412 if (h != NULL)
4413 {
4414 struct elf32_arm_link_hash_entry *eh;
4415 struct elf32_arm_relocs_copied **pp;
4416 struct elf32_arm_relocs_copied *p;
4417
4418 eh = (struct elf32_arm_link_hash_entry *) h;
4419
4420 if (h->plt.refcount > 0)
4421 {
4422 h->plt.refcount -= 1;
4423 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22)
4424 eh->plt_thumb_refcount--;
4425 }
4426
4427 if (r_type == R_ARM_ABS32
4428 || r_type == R_ARM_REL32)
4429 {
4430 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
4431 pp = &p->next)
4432 if (p->section == sec)
4433 {
4434 p->count -= 1;
4435 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
4436 p->pc_count -= 1;
4437 if (p->count == 0)
4438 *pp = p->next;
4439 break;
4440 }
4441 }
4442 }
4443 break;
4444
4445 default:
4446 break;
4447 }
4448 }
4449
4450 return TRUE;
4451 }
4452
4453 /* Look through the relocs for a section during the first phase. */
4454
4455 static bfd_boolean
4456 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
4457 asection *sec, const Elf_Internal_Rela *relocs)
4458 {
4459 Elf_Internal_Shdr *symtab_hdr;
4460 struct elf_link_hash_entry **sym_hashes;
4461 struct elf_link_hash_entry **sym_hashes_end;
4462 const Elf_Internal_Rela *rel;
4463 const Elf_Internal_Rela *rel_end;
4464 bfd *dynobj;
4465 asection *sreloc;
4466 bfd_vma *local_got_offsets;
4467 struct elf32_arm_link_hash_table *htab;
4468
4469 if (info->relocatable)
4470 return TRUE;
4471
4472 htab = elf32_arm_hash_table (info);
4473 sreloc = NULL;
4474
4475 /* Create dynamic sections for relocatable executables so that we can
4476 copy relocations. */
4477 if (htab->root.is_relocatable_executable
4478 && ! htab->root.dynamic_sections_created)
4479 {
4480 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
4481 return FALSE;
4482 }
4483
4484 dynobj = elf_hash_table (info)->dynobj;
4485 local_got_offsets = elf_local_got_offsets (abfd);
4486
4487 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4488 sym_hashes = elf_sym_hashes (abfd);
4489 sym_hashes_end = sym_hashes
4490 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
4491
4492 if (!elf_bad_symtab (abfd))
4493 sym_hashes_end -= symtab_hdr->sh_info;
4494
4495 rel_end = relocs + sec->reloc_count;
4496 for (rel = relocs; rel < rel_end; rel++)
4497 {
4498 struct elf_link_hash_entry *h;
4499 struct elf32_arm_link_hash_entry *eh;
4500 unsigned long r_symndx;
4501 int r_type;
4502
4503 r_symndx = ELF32_R_SYM (rel->r_info);
4504 r_type = ELF32_R_TYPE (rel->r_info);
4505 #ifndef OLD_ARM_ABI
4506 r_type = arm_real_reloc_type (htab, r_type);
4507 #endif
4508
4509 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
4510 {
4511 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
4512 r_symndx);
4513 return FALSE;
4514 }
4515
4516 if (r_symndx < symtab_hdr->sh_info)
4517 h = NULL;
4518 else
4519 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4520
4521 eh = (struct elf32_arm_link_hash_entry *) h;
4522
4523 switch (r_type)
4524 {
4525 case R_ARM_GOT32:
4526 #ifndef OLD_ARM_ABI
4527 case R_ARM_GOT_PREL:
4528 #endif
4529 case R_ARM_TLS_GD32:
4530 case R_ARM_TLS_IE32:
4531 /* This symbol requires a global offset table entry. */
4532 {
4533 int tls_type, old_tls_type;
4534
4535 switch (r_type)
4536 {
4537 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
4538 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
4539 default: tls_type = GOT_NORMAL; break;
4540 }
4541
4542 if (h != NULL)
4543 {
4544 h->got.refcount++;
4545 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
4546 }
4547 else
4548 {
4549 bfd_signed_vma *local_got_refcounts;
4550
4551 /* This is a global offset table entry for a local symbol. */
4552 local_got_refcounts = elf_local_got_refcounts (abfd);
4553 if (local_got_refcounts == NULL)
4554 {
4555 bfd_size_type size;
4556
4557 size = symtab_hdr->sh_info;
4558 size *= (sizeof (bfd_signed_vma) + sizeof(char));
4559 local_got_refcounts = bfd_zalloc (abfd, size);
4560 if (local_got_refcounts == NULL)
4561 return FALSE;
4562 elf_local_got_refcounts (abfd) = local_got_refcounts;
4563 elf32_arm_local_got_tls_type (abfd)
4564 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4565 }
4566 local_got_refcounts[r_symndx] += 1;
4567 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
4568 }
4569
4570 /* We will already have issued an error message if there is a
4571 TLS / non-TLS mismatch, based on the symbol type. We don't
4572 support any linker relaxations. So just combine any TLS
4573 types needed. */
4574 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4575 && tls_type != GOT_NORMAL)
4576 tls_type |= old_tls_type;
4577
4578 if (old_tls_type != tls_type)
4579 {
4580 if (h != NULL)
4581 elf32_arm_hash_entry (h)->tls_type = tls_type;
4582 else
4583 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
4584 }
4585 }
4586 /* Fall through */
4587
4588 case R_ARM_TLS_LDM32:
4589 if (r_type == R_ARM_TLS_LDM32)
4590 htab->tls_ldm_got.refcount++;
4591 /* Fall through */
4592
4593 case R_ARM_GOTOFF:
4594 case R_ARM_GOTPC:
4595 if (htab->sgot == NULL)
4596 {
4597 if (htab->root.dynobj == NULL)
4598 htab->root.dynobj = abfd;
4599 if (!create_got_section (htab->root.dynobj, info))
4600 return FALSE;
4601 }
4602 break;
4603
4604 case R_ARM_ABS32:
4605 case R_ARM_REL32:
4606 case R_ARM_PC24:
4607 case R_ARM_PLT32:
4608 #ifndef OLD_ARM_ABI
4609 case R_ARM_CALL:
4610 case R_ARM_JUMP24:
4611 case R_ARM_PREL31:
4612 #endif
4613 case R_ARM_THM_PC22:
4614 /* Should the interworking branches be listed here? */
4615 if (h != NULL)
4616 {
4617 /* If this reloc is in a read-only section, we might
4618 need a copy reloc. We can't check reliably at this
4619 stage whether the section is read-only, as input
4620 sections have not yet been mapped to output sections.
4621 Tentatively set the flag for now, and correct in
4622 adjust_dynamic_symbol. */
4623 if (!info->shared)
4624 h->non_got_ref = 1;
4625
4626 /* We may need a .plt entry if the function this reloc
4627 refers to is in a different object. We can't tell for
4628 sure yet, because something later might force the
4629 symbol local. */
4630 if (r_type == R_ARM_PC24
4631 #ifndef OLD_ARM_ABI
4632 || r_type == R_ARM_CALL
4633 || r_type == R_ARM_JUMP24
4634 || r_type == R_ARM_PREL31
4635 #endif
4636 || r_type == R_ARM_PLT32
4637 || r_type == R_ARM_THM_PC22)
4638 h->needs_plt = 1;
4639
4640 /* If we create a PLT entry, this relocation will reference
4641 it, even if it's an ABS32 relocation. */
4642 h->plt.refcount += 1;
4643
4644 if (r_type == R_ARM_THM_PC22)
4645 eh->plt_thumb_refcount += 1;
4646 }
4647
4648 /* If we are creating a shared library or relocatable executable,
4649 and this is a reloc against a global symbol, or a non PC
4650 relative reloc against a local symbol, then we need to copy
4651 the reloc into the shared library. However, if we are linking
4652 with -Bsymbolic, we do not need to copy a reloc against a
4653 global symbol which is defined in an object we are
4654 including in the link (i.e., DEF_REGULAR is set). At
4655 this point we have not seen all the input files, so it is
4656 possible that DEF_REGULAR is not set now but will be set
4657 later (it is never cleared). We account for that
4658 possibility below by storing information in the
4659 relocs_copied field of the hash table entry. */
4660 if ((info->shared || htab->root.is_relocatable_executable)
4661 && (sec->flags & SEC_ALLOC) != 0
4662 && (r_type == R_ARM_ABS32
4663 || (h != NULL && ! h->needs_plt
4664 && (! info->symbolic || ! h->def_regular))))
4665 {
4666 struct elf32_arm_relocs_copied *p, **head;
4667
4668 /* When creating a shared object, we must copy these
4669 reloc types into the output file. We create a reloc
4670 section in dynobj and make room for this reloc. */
4671 if (sreloc == NULL)
4672 {
4673 const char * name;
4674
4675 name = (bfd_elf_string_from_elf_section
4676 (abfd,
4677 elf_elfheader (abfd)->e_shstrndx,
4678 elf_section_data (sec)->rel_hdr.sh_name));
4679 if (name == NULL)
4680 return FALSE;
4681
4682 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
4683 && strcmp (bfd_get_section_name (abfd, sec),
4684 name + 4) == 0);
4685
4686 sreloc = bfd_get_section_by_name (dynobj, name);
4687 if (sreloc == NULL)
4688 {
4689 flagword flags;
4690
4691 sreloc = bfd_make_section (dynobj, name);
4692 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4693 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4694 if ((sec->flags & SEC_ALLOC) != 0
4695 /* BPABI objects never have dynamic
4696 relocations mapped. */
4697 && !htab->symbian_p)
4698 flags |= SEC_ALLOC | SEC_LOAD;
4699 if (sreloc == NULL
4700 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4701 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
4702 return FALSE;
4703 }
4704
4705 elf_section_data (sec)->sreloc = sreloc;
4706 }
4707
4708 /* If this is a global symbol, we count the number of
4709 relocations we need for this symbol. */
4710 if (h != NULL)
4711 {
4712 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
4713 }
4714 else
4715 {
4716 /* Track dynamic relocs needed for local syms too.
4717 We really need local syms available to do this
4718 easily. Oh well. */
4719
4720 asection *s;
4721 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4722 sec, r_symndx);
4723 if (s == NULL)
4724 return FALSE;
4725
4726 head = ((struct elf32_arm_relocs_copied **)
4727 &elf_section_data (s)->local_dynrel);
4728 }
4729
4730 p = *head;
4731 if (p == NULL || p->section != sec)
4732 {
4733 bfd_size_type amt = sizeof *p;
4734
4735 p = bfd_alloc (htab->root.dynobj, amt);
4736 if (p == NULL)
4737 return FALSE;
4738 p->next = *head;
4739 *head = p;
4740 p->section = sec;
4741 p->count = 0;
4742 p->pc_count = 0;
4743 }
4744
4745 if (r_type == R_ARM_REL32)
4746 p->pc_count += 1;
4747 p->count += 1;
4748 }
4749 break;
4750
4751 /* This relocation describes the C++ object vtable hierarchy.
4752 Reconstruct it for later use during GC. */
4753 case R_ARM_GNU_VTINHERIT:
4754 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4755 return FALSE;
4756 break;
4757
4758 /* This relocation describes which C++ vtable entries are actually
4759 used. Record for later use during GC. */
4760 case R_ARM_GNU_VTENTRY:
4761 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
4762 return FALSE;
4763 break;
4764 }
4765 }
4766
4767 return TRUE;
4768 }
4769
4770 /* Treat mapping symbols as special target symbols. */
4771
4772 static bfd_boolean
4773 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
4774 {
4775 return bfd_is_arm_mapping_symbol_name (sym->name);
4776 }
4777
4778 /* This is a copy of elf_find_function() from elf.c except that
4779 ARM mapping symbols are ignored when looking for function names
4780 and STT_ARM_TFUNC is considered to a function type. */
4781
4782 static bfd_boolean
4783 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
4784 asection * section,
4785 asymbol ** symbols,
4786 bfd_vma offset,
4787 const char ** filename_ptr,
4788 const char ** functionname_ptr)
4789 {
4790 const char * filename = NULL;
4791 asymbol * func = NULL;
4792 bfd_vma low_func = 0;
4793 asymbol ** p;
4794
4795 for (p = symbols; *p != NULL; p++)
4796 {
4797 elf_symbol_type *q;
4798
4799 q = (elf_symbol_type *) *p;
4800
4801 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4802 {
4803 default:
4804 break;
4805 case STT_FILE:
4806 filename = bfd_asymbol_name (&q->symbol);
4807 break;
4808 case STT_FUNC:
4809 case STT_ARM_TFUNC:
4810 case STT_NOTYPE:
4811 /* Skip $a and $t symbols. */
4812 if ((q->symbol.flags & BSF_LOCAL)
4813 && bfd_is_arm_mapping_symbol_name (q->symbol.name))
4814 continue;
4815 /* Fall through. */
4816 if (bfd_get_section (&q->symbol) == section
4817 && q->symbol.value >= low_func
4818 && q->symbol.value <= offset)
4819 {
4820 func = (asymbol *) q;
4821 low_func = q->symbol.value;
4822 }
4823 break;
4824 }
4825 }
4826
4827 if (func == NULL)
4828 return FALSE;
4829
4830 if (filename_ptr)
4831 *filename_ptr = filename;
4832 if (functionname_ptr)
4833 *functionname_ptr = bfd_asymbol_name (func);
4834
4835 return TRUE;
4836 }
4837
4838
4839 /* Find the nearest line to a particular section and offset, for error
4840 reporting. This code is a duplicate of the code in elf.c, except
4841 that it uses arm_elf_find_function. */
4842
4843 static bfd_boolean
4844 elf32_arm_find_nearest_line (bfd * abfd,
4845 asection * section,
4846 asymbol ** symbols,
4847 bfd_vma offset,
4848 const char ** filename_ptr,
4849 const char ** functionname_ptr,
4850 unsigned int * line_ptr)
4851 {
4852 bfd_boolean found = FALSE;
4853
4854 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
4855
4856 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4857 filename_ptr, functionname_ptr,
4858 line_ptr, 0,
4859 & elf_tdata (abfd)->dwarf2_find_line_info))
4860 {
4861 if (!*functionname_ptr)
4862 arm_elf_find_function (abfd, section, symbols, offset,
4863 *filename_ptr ? NULL : filename_ptr,
4864 functionname_ptr);
4865
4866 return TRUE;
4867 }
4868
4869 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4870 & found, filename_ptr,
4871 functionname_ptr, line_ptr,
4872 & elf_tdata (abfd)->line_info))
4873 return FALSE;
4874
4875 if (found && (*functionname_ptr || *line_ptr))
4876 return TRUE;
4877
4878 if (symbols == NULL)
4879 return FALSE;
4880
4881 if (! arm_elf_find_function (abfd, section, symbols, offset,
4882 filename_ptr, functionname_ptr))
4883 return FALSE;
4884
4885 *line_ptr = 0;
4886 return TRUE;
4887 }
4888
4889 /* Adjust a symbol defined by a dynamic object and referenced by a
4890 regular object. The current definition is in some section of the
4891 dynamic object, but we're not including those sections. We have to
4892 change the definition to something the rest of the link can
4893 understand. */
4894
4895 static bfd_boolean
4896 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
4897 struct elf_link_hash_entry * h)
4898 {
4899 bfd * dynobj;
4900 asection * s;
4901 unsigned int power_of_two;
4902 struct elf32_arm_link_hash_entry * eh;
4903 struct elf32_arm_link_hash_table *globals;
4904
4905 globals = elf32_arm_hash_table (info);
4906 dynobj = elf_hash_table (info)->dynobj;
4907
4908 /* Make sure we know what is going on here. */
4909 BFD_ASSERT (dynobj != NULL
4910 && (h->needs_plt
4911 || h->u.weakdef != NULL
4912 || (h->def_dynamic
4913 && h->ref_regular
4914 && !h->def_regular)));
4915
4916 eh = (struct elf32_arm_link_hash_entry *) h;
4917
4918 /* If this is a function, put it in the procedure linkage table. We
4919 will fill in the contents of the procedure linkage table later,
4920 when we know the address of the .got section. */
4921 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
4922 || h->needs_plt)
4923 {
4924 if (h->plt.refcount <= 0
4925 || SYMBOL_CALLS_LOCAL (info, h)
4926 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4927 && h->root.type == bfd_link_hash_undefweak))
4928 {
4929 /* This case can occur if we saw a PLT32 reloc in an input
4930 file, but the symbol was never referred to by a dynamic
4931 object, or if all references were garbage collected. In
4932 such a case, we don't actually need to build a procedure
4933 linkage table, and we can just do a PC24 reloc instead. */
4934 h->plt.offset = (bfd_vma) -1;
4935 eh->plt_thumb_refcount = 0;
4936 h->needs_plt = 0;
4937 }
4938
4939 return TRUE;
4940 }
4941 else
4942 {
4943 /* It's possible that we incorrectly decided a .plt reloc was
4944 needed for an R_ARM_PC24 or similar reloc to a non-function sym
4945 in check_relocs. We can't decide accurately between function
4946 and non-function syms in check-relocs; Objects loaded later in
4947 the link may change h->type. So fix it now. */
4948 h->plt.offset = (bfd_vma) -1;
4949 eh->plt_thumb_refcount = 0;
4950 }
4951
4952 /* If this is a weak symbol, and there is a real definition, the
4953 processor independent code will have arranged for us to see the
4954 real definition first, and we can just use the same value. */
4955 if (h->u.weakdef != NULL)
4956 {
4957 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4958 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4959 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4960 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4961 return TRUE;
4962 }
4963
4964 /* If there are no non-GOT references, we do not need a copy
4965 relocation. */
4966 if (!h->non_got_ref)
4967 return TRUE;
4968
4969 /* This is a reference to a symbol defined by a dynamic object which
4970 is not a function. */
4971
4972 /* If we are creating a shared library, we must presume that the
4973 only references to the symbol are via the global offset table.
4974 For such cases we need not do anything here; the relocations will
4975 be handled correctly by relocate_section. Relocatable executables
4976 can reference data in shared objects directly, so we don't need to
4977 do anything here. */
4978 if (info->shared || globals->root.is_relocatable_executable)
4979 return TRUE;
4980
4981 /* We must allocate the symbol in our .dynbss section, which will
4982 become part of the .bss section of the executable. There will be
4983 an entry for this symbol in the .dynsym section. The dynamic
4984 object will contain position independent code, so all references
4985 from the dynamic object to this symbol will go through the global
4986 offset table. The dynamic linker will use the .dynsym entry to
4987 determine the address it must put in the global offset table, so
4988 both the dynamic object and the regular object will refer to the
4989 same memory location for the variable. */
4990 s = bfd_get_section_by_name (dynobj, ".dynbss");
4991 BFD_ASSERT (s != NULL);
4992
4993 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
4994 copy the initial value out of the dynamic object and into the
4995 runtime process image. We need to remember the offset into the
4996 .rel.bss section we are going to use. */
4997 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4998 {
4999 asection *srel;
5000
5001 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
5002 BFD_ASSERT (srel != NULL);
5003 srel->size += sizeof (Elf32_External_Rel);
5004 h->needs_copy = 1;
5005 }
5006
5007 /* We need to figure out the alignment required for this symbol. I
5008 have no idea how ELF linkers handle this. */
5009 power_of_two = bfd_log2 (h->size);
5010 if (power_of_two > 3)
5011 power_of_two = 3;
5012
5013 /* Apply the required alignment. */
5014 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5015 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5016 {
5017 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
5018 return FALSE;
5019 }
5020
5021 /* Define the symbol as being at this point in the section. */
5022 h->root.u.def.section = s;
5023 h->root.u.def.value = s->size;
5024
5025 /* Increment the section size to make room for the symbol. */
5026 s->size += h->size;
5027
5028 return TRUE;
5029 }
5030
5031 /* Allocate space in .plt, .got and associated reloc sections for
5032 dynamic relocs. */
5033
5034 static bfd_boolean
5035 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
5036 {
5037 struct bfd_link_info *info;
5038 struct elf32_arm_link_hash_table *htab;
5039 struct elf32_arm_link_hash_entry *eh;
5040 struct elf32_arm_relocs_copied *p;
5041
5042 eh = (struct elf32_arm_link_hash_entry *) h;
5043
5044 if (h->root.type == bfd_link_hash_indirect)
5045 return TRUE;
5046
5047 if (h->root.type == bfd_link_hash_warning)
5048 /* When warning symbols are created, they **replace** the "real"
5049 entry in the hash table, thus we never get to see the real
5050 symbol in a hash traversal. So look at it now. */
5051 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5052
5053 info = (struct bfd_link_info *) inf;
5054 htab = elf32_arm_hash_table (info);
5055
5056 if (htab->root.dynamic_sections_created
5057 && h->plt.refcount > 0)
5058 {
5059 /* Make sure this symbol is output as a dynamic symbol.
5060 Undefined weak syms won't yet be marked as dynamic. */
5061 if (h->dynindx == -1
5062 && !h->forced_local)
5063 {
5064 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5065 return FALSE;
5066 }
5067
5068 if (info->shared
5069 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5070 {
5071 asection *s = htab->splt;
5072
5073 /* If this is the first .plt entry, make room for the special
5074 first entry. */
5075 if (s->size == 0)
5076 s->size += htab->plt_header_size;
5077
5078 h->plt.offset = s->size;
5079
5080 /* If we will insert a Thumb trampoline before this PLT, leave room
5081 for it. */
5082 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
5083 {
5084 h->plt.offset += PLT_THUMB_STUB_SIZE;
5085 s->size += PLT_THUMB_STUB_SIZE;
5086 }
5087
5088 /* If this symbol is not defined in a regular file, and we are
5089 not generating a shared library, then set the symbol to this
5090 location in the .plt. This is required to make function
5091 pointers compare as equal between the normal executable and
5092 the shared library. */
5093 if (! info->shared
5094 && !h->def_regular)
5095 {
5096 h->root.u.def.section = s;
5097 h->root.u.def.value = h->plt.offset;
5098
5099 /* Make sure the function is not marked as Thumb, in case
5100 it is the target of an ABS32 relocation, which will
5101 point to the PLT entry. */
5102 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
5103 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
5104 }
5105
5106 /* Make room for this entry. */
5107 s->size += htab->plt_entry_size;
5108
5109 if (!htab->symbian_p)
5110 {
5111 /* We also need to make an entry in the .got.plt section, which
5112 will be placed in the .got section by the linker script. */
5113 eh->plt_got_offset = htab->sgotplt->size;
5114 htab->sgotplt->size += 4;
5115 }
5116
5117 /* We also need to make an entry in the .rel.plt section. */
5118 htab->srelplt->size += sizeof (Elf32_External_Rel);
5119 }
5120 else
5121 {
5122 h->plt.offset = (bfd_vma) -1;
5123 h->needs_plt = 0;
5124 }
5125 }
5126 else
5127 {
5128 h->plt.offset = (bfd_vma) -1;
5129 h->needs_plt = 0;
5130 }
5131
5132 if (h->got.refcount > 0)
5133 {
5134 asection *s;
5135 bfd_boolean dyn;
5136 int tls_type = elf32_arm_hash_entry (h)->tls_type;
5137 int indx;
5138
5139 /* Make sure this symbol is output as a dynamic symbol.
5140 Undefined weak syms won't yet be marked as dynamic. */
5141 if (h->dynindx == -1
5142 && !h->forced_local)
5143 {
5144 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5145 return FALSE;
5146 }
5147
5148 if (!htab->symbian_p)
5149 {
5150 s = htab->sgot;
5151 h->got.offset = s->size;
5152
5153 if (tls_type == GOT_UNKNOWN)
5154 abort ();
5155
5156 if (tls_type == GOT_NORMAL)
5157 /* Non-TLS symbols need one GOT slot. */
5158 s->size += 4;
5159 else
5160 {
5161 if (tls_type & GOT_TLS_GD)
5162 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
5163 s->size += 8;
5164 if (tls_type & GOT_TLS_IE)
5165 /* R_ARM_TLS_IE32 needs one GOT slot. */
5166 s->size += 4;
5167 }
5168
5169 dyn = htab->root.dynamic_sections_created;
5170
5171 indx = 0;
5172 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5173 && (!info->shared
5174 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5175 indx = h->dynindx;
5176
5177 if (tls_type != GOT_NORMAL
5178 && (info->shared || indx != 0)
5179 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5180 || h->root.type != bfd_link_hash_undefweak))
5181 {
5182 if (tls_type & GOT_TLS_IE)
5183 htab->srelgot->size += sizeof (Elf32_External_Rel);
5184
5185 if (tls_type & GOT_TLS_GD)
5186 htab->srelgot->size += sizeof (Elf32_External_Rel);
5187
5188 if ((tls_type & GOT_TLS_GD) && indx != 0)
5189 htab->srelgot->size += sizeof (Elf32_External_Rel);
5190 }
5191 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5192 || h->root.type != bfd_link_hash_undefweak)
5193 && (info->shared
5194 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5195 htab->srelgot->size += sizeof (Elf32_External_Rel);
5196 }
5197 }
5198 else
5199 h->got.offset = (bfd_vma) -1;
5200
5201 if (eh->relocs_copied == NULL)
5202 return TRUE;
5203
5204 /* In the shared -Bsymbolic case, discard space allocated for
5205 dynamic pc-relative relocs against symbols which turn out to be
5206 defined in regular objects. For the normal shared case, discard
5207 space for pc-relative relocs that have become local due to symbol
5208 visibility changes. */
5209
5210 if (info->shared || htab->root.is_relocatable_executable)
5211 {
5212 /* The only reloc that uses pc_count is R_ARM_REL32, which will
5213 appear on something like ".long foo - .". We want calls to
5214 protected symbols to resolve directly to the function rather
5215 than going via the plt. If people want function pointer
5216 comparisons to work as expected then they should avoid
5217 writing assembly like ".long foo - .". */
5218 if (SYMBOL_CALLS_LOCAL (info, h))
5219 {
5220 struct elf32_arm_relocs_copied **pp;
5221
5222 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
5223 {
5224 p->count -= p->pc_count;
5225 p->pc_count = 0;
5226 if (p->count == 0)
5227 *pp = p->next;
5228 else
5229 pp = &p->next;
5230 }
5231 }
5232
5233 /* Also discard relocs on undefined weak syms with non-default
5234 visibility. */
5235 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5236 && h->root.type == bfd_link_hash_undefweak)
5237 eh->relocs_copied = NULL;
5238 else if (htab->root.is_relocatable_executable && h->dynindx == -1
5239 && h->root.type == bfd_link_hash_new)
5240 {
5241 /* Output absolute symbols so that we can create relocations
5242 against them. For normal symbols we output a relocation
5243 against the section that contains them. */
5244 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5245 return FALSE;
5246 }
5247
5248 }
5249 else
5250 {
5251 /* For the non-shared case, discard space for relocs against
5252 symbols which turn out to need copy relocs or are not
5253 dynamic. */
5254
5255 if (!h->non_got_ref
5256 && ((h->def_dynamic
5257 && !h->def_regular)
5258 || (htab->root.dynamic_sections_created
5259 && (h->root.type == bfd_link_hash_undefweak
5260 || h->root.type == bfd_link_hash_undefined))))
5261 {
5262 /* Make sure this symbol is output as a dynamic symbol.
5263 Undefined weak syms won't yet be marked as dynamic. */
5264 if (h->dynindx == -1
5265 && !h->forced_local)
5266 {
5267 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5268 return FALSE;
5269 }
5270
5271 /* If that succeeded, we know we'll be keeping all the
5272 relocs. */
5273 if (h->dynindx != -1)
5274 goto keep;
5275 }
5276
5277 eh->relocs_copied = NULL;
5278
5279 keep: ;
5280 }
5281
5282 /* Finally, allocate space. */
5283 for (p = eh->relocs_copied; p != NULL; p = p->next)
5284 {
5285 asection *sreloc = elf_section_data (p->section)->sreloc;
5286 sreloc->size += p->count * sizeof (Elf32_External_Rel);
5287 }
5288
5289 return TRUE;
5290 }
5291
5292 /* Find any dynamic relocs that apply to read-only sections. */
5293
5294 static bfd_boolean
5295 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5296 {
5297 struct elf32_arm_link_hash_entry *eh;
5298 struct elf32_arm_relocs_copied *p;
5299
5300 if (h->root.type == bfd_link_hash_warning)
5301 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5302
5303 eh = (struct elf32_arm_link_hash_entry *) h;
5304 for (p = eh->relocs_copied; p != NULL; p = p->next)
5305 {
5306 asection *s = p->section;
5307
5308 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5309 {
5310 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5311
5312 info->flags |= DF_TEXTREL;
5313
5314 /* Not an error, just cut short the traversal. */
5315 return FALSE;
5316 }
5317 }
5318 return TRUE;
5319 }
5320
5321 /* Set the sizes of the dynamic sections. */
5322
5323 static bfd_boolean
5324 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5325 struct bfd_link_info * info)
5326 {
5327 bfd * dynobj;
5328 asection * s;
5329 bfd_boolean plt;
5330 bfd_boolean relocs;
5331 bfd *ibfd;
5332 struct elf32_arm_link_hash_table *htab;
5333
5334 htab = elf32_arm_hash_table (info);
5335 dynobj = elf_hash_table (info)->dynobj;
5336 BFD_ASSERT (dynobj != NULL);
5337
5338 if (elf_hash_table (info)->dynamic_sections_created)
5339 {
5340 /* Set the contents of the .interp section to the interpreter. */
5341 if (info->executable)
5342 {
5343 s = bfd_get_section_by_name (dynobj, ".interp");
5344 BFD_ASSERT (s != NULL);
5345 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5346 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5347 }
5348 }
5349
5350 /* Set up .got offsets for local syms, and space for local dynamic
5351 relocs. */
5352 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5353 {
5354 bfd_signed_vma *local_got;
5355 bfd_signed_vma *end_local_got;
5356 char *local_tls_type;
5357 bfd_size_type locsymcount;
5358 Elf_Internal_Shdr *symtab_hdr;
5359 asection *srel;
5360
5361 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5362 continue;
5363
5364 for (s = ibfd->sections; s != NULL; s = s->next)
5365 {
5366 struct elf32_arm_relocs_copied *p;
5367
5368 for (p = *((struct elf32_arm_relocs_copied **)
5369 &elf_section_data (s)->local_dynrel);
5370 p != NULL;
5371 p = p->next)
5372 {
5373 if (!bfd_is_abs_section (p->section)
5374 && bfd_is_abs_section (p->section->output_section))
5375 {
5376 /* Input section has been discarded, either because
5377 it is a copy of a linkonce section or due to
5378 linker script /DISCARD/, so we'll be discarding
5379 the relocs too. */
5380 }
5381 else if (p->count != 0)
5382 {
5383 srel = elf_section_data (p->section)->sreloc;
5384 srel->size += p->count * sizeof (Elf32_External_Rel);
5385 if ((p->section->output_section->flags & SEC_READONLY) != 0)
5386 info->flags |= DF_TEXTREL;
5387 }
5388 }
5389 }
5390
5391 local_got = elf_local_got_refcounts (ibfd);
5392 if (!local_got)
5393 continue;
5394
5395 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5396 locsymcount = symtab_hdr->sh_info;
5397 end_local_got = local_got + locsymcount;
5398 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
5399 s = htab->sgot;
5400 srel = htab->srelgot;
5401 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5402 {
5403 if (*local_got > 0)
5404 {
5405 *local_got = s->size;
5406 if (*local_tls_type & GOT_TLS_GD)
5407 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5408 s->size += 8;
5409 if (*local_tls_type & GOT_TLS_IE)
5410 s->size += 4;
5411 if (*local_tls_type == GOT_NORMAL)
5412 s->size += 4;
5413
5414 if (info->shared || *local_tls_type == GOT_TLS_GD)
5415 srel->size += sizeof (Elf32_External_Rel);
5416 }
5417 else
5418 *local_got = (bfd_vma) -1;
5419 }
5420 }
5421
5422 if (htab->tls_ldm_got.refcount > 0)
5423 {
5424 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5425 for R_ARM_TLS_LDM32 relocations. */
5426 htab->tls_ldm_got.offset = htab->sgot->size;
5427 htab->sgot->size += 8;
5428 if (info->shared)
5429 htab->srelgot->size += sizeof (Elf32_External_Rel);
5430 }
5431 else
5432 htab->tls_ldm_got.offset = -1;
5433
5434 /* Allocate global sym .plt and .got entries, and space for global
5435 sym dynamic relocs. */
5436 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5437
5438 /* The check_relocs and adjust_dynamic_symbol entry points have
5439 determined the sizes of the various dynamic sections. Allocate
5440 memory for them. */
5441 plt = FALSE;
5442 relocs = FALSE;
5443 for (s = dynobj->sections; s != NULL; s = s->next)
5444 {
5445 const char * name;
5446 bfd_boolean strip;
5447
5448 if ((s->flags & SEC_LINKER_CREATED) == 0)
5449 continue;
5450
5451 /* It's OK to base decisions on the section name, because none
5452 of the dynobj section names depend upon the input files. */
5453 name = bfd_get_section_name (dynobj, s);
5454
5455 strip = FALSE;
5456
5457 if (strcmp (name, ".plt") == 0)
5458 {
5459 if (s->size == 0)
5460 {
5461 /* Strip this section if we don't need it; see the
5462 comment below. */
5463 strip = TRUE;
5464 }
5465 else
5466 {
5467 /* Remember whether there is a PLT. */
5468 plt = TRUE;
5469 }
5470 }
5471 else if (strncmp (name, ".rel", 4) == 0)
5472 {
5473 if (s->size == 0)
5474 {
5475 /* If we don't need this section, strip it from the
5476 output file. This is mostly to handle .rel.bss and
5477 .rel.plt. We must create both sections in
5478 create_dynamic_sections, because they must be created
5479 before the linker maps input sections to output
5480 sections. The linker does that before
5481 adjust_dynamic_symbol is called, and it is that
5482 function which decides whether anything needs to go
5483 into these sections. */
5484 strip = TRUE;
5485 }
5486 else
5487 {
5488 /* Remember whether there are any reloc sections other
5489 than .rel.plt. */
5490 if (strcmp (name, ".rel.plt") != 0)
5491 relocs = TRUE;
5492
5493 /* We use the reloc_count field as a counter if we need
5494 to copy relocs into the output file. */
5495 s->reloc_count = 0;
5496 }
5497 }
5498 else if (strncmp (name, ".got", 4) != 0)
5499 {
5500 /* It's not one of our sections, so don't allocate space. */
5501 continue;
5502 }
5503
5504 if (strip)
5505 {
5506 _bfd_strip_section_from_output (info, s);
5507 continue;
5508 }
5509
5510 /* Allocate memory for the section contents. */
5511 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5512 if (s->contents == NULL && s->size != 0)
5513 return FALSE;
5514 }
5515
5516 if (elf_hash_table (info)->dynamic_sections_created)
5517 {
5518 /* Add some entries to the .dynamic section. We fill in the
5519 values later, in elf32_arm_finish_dynamic_sections, but we
5520 must add the entries now so that we get the correct size for
5521 the .dynamic section. The DT_DEBUG entry is filled in by the
5522 dynamic linker and used by the debugger. */
5523 #define add_dynamic_entry(TAG, VAL) \
5524 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5525
5526 if (!info->shared)
5527 {
5528 if (!add_dynamic_entry (DT_DEBUG, 0))
5529 return FALSE;
5530 }
5531
5532 if (plt)
5533 {
5534 if ( !add_dynamic_entry (DT_PLTGOT, 0)
5535 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5536 || !add_dynamic_entry (DT_PLTREL, DT_REL)
5537 || !add_dynamic_entry (DT_JMPREL, 0))
5538 return FALSE;
5539 }
5540
5541 if (relocs)
5542 {
5543 if ( !add_dynamic_entry (DT_REL, 0)
5544 || !add_dynamic_entry (DT_RELSZ, 0)
5545 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
5546 return FALSE;
5547 }
5548
5549 /* If any dynamic relocs apply to a read-only section,
5550 then we need a DT_TEXTREL entry. */
5551 if ((info->flags & DF_TEXTREL) == 0)
5552 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
5553 (PTR) info);
5554
5555 if ((info->flags & DF_TEXTREL) != 0)
5556 {
5557 if (!add_dynamic_entry (DT_TEXTREL, 0))
5558 return FALSE;
5559 info->flags |= DF_TEXTREL;
5560 }
5561 }
5562 #undef add_synamic_entry
5563
5564 return TRUE;
5565 }
5566
5567 /* Finish up dynamic symbol handling. We set the contents of various
5568 dynamic sections here. */
5569
5570 static bfd_boolean
5571 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
5572 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
5573 {
5574 bfd * dynobj;
5575 struct elf32_arm_link_hash_table *htab;
5576 struct elf32_arm_link_hash_entry *eh;
5577
5578 dynobj = elf_hash_table (info)->dynobj;
5579 htab = elf32_arm_hash_table (info);
5580 eh = (struct elf32_arm_link_hash_entry *) h;
5581
5582 if (h->plt.offset != (bfd_vma) -1)
5583 {
5584 asection * splt;
5585 asection * srel;
5586 bfd_byte *loc;
5587 bfd_vma plt_index;
5588 Elf_Internal_Rela rel;
5589
5590 /* This symbol has an entry in the procedure linkage table. Set
5591 it up. */
5592
5593 BFD_ASSERT (h->dynindx != -1);
5594
5595 splt = bfd_get_section_by_name (dynobj, ".plt");
5596 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
5597 BFD_ASSERT (splt != NULL && srel != NULL);
5598
5599 /* Fill in the entry in the procedure linkage table. */
5600 if (htab->symbian_p)
5601 {
5602 unsigned i;
5603 for (i = 0; i < htab->plt_entry_size / 4; ++i)
5604 bfd_put_32 (output_bfd,
5605 elf32_arm_symbian_plt_entry[i],
5606 splt->contents + h->plt.offset + 4 * i);
5607
5608 /* Fill in the entry in the .rel.plt section. */
5609 rel.r_offset = (splt->output_section->vma
5610 + splt->output_offset
5611 + h->plt.offset + 4 * (i - 1));
5612 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5613
5614 /* Get the index in the procedure linkage table which
5615 corresponds to this symbol. This is the index of this symbol
5616 in all the symbols for which we are making plt entries. The
5617 first entry in the procedure linkage table is reserved. */
5618 plt_index = ((h->plt.offset - htab->plt_header_size)
5619 / htab->plt_entry_size);
5620 }
5621 else
5622 {
5623 bfd_vma got_offset;
5624 bfd_vma got_displacement;
5625 asection * sgot;
5626
5627 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5628 BFD_ASSERT (sgot != NULL);
5629
5630 /* Get the offset into the .got.plt table of the entry that
5631 corresponds to this function. */
5632 got_offset = eh->plt_got_offset;
5633
5634 /* Get the index in the procedure linkage table which
5635 corresponds to this symbol. This is the index of this symbol
5636 in all the symbols for which we are making plt entries. The
5637 first three entries in .got.plt are reserved; after that
5638 symbols appear in the same order as in .plt. */
5639 plt_index = (got_offset - 12) / 4;
5640
5641 /* Calculate the displacement between the PLT slot and the
5642 entry in the GOT. The eight-byte offset accounts for the
5643 value produced by adding to pc in the first instruction
5644 of the PLT stub. */
5645 got_displacement = (sgot->output_section->vma
5646 + sgot->output_offset
5647 + got_offset
5648 - splt->output_section->vma
5649 - splt->output_offset
5650 - h->plt.offset
5651 - 8);
5652
5653 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
5654
5655 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
5656 {
5657 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
5658 splt->contents + h->plt.offset - 4);
5659 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
5660 splt->contents + h->plt.offset - 2);
5661 }
5662
5663 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
5664 splt->contents + h->plt.offset + 0);
5665 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
5666 splt->contents + h->plt.offset + 4);
5667 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
5668 splt->contents + h->plt.offset + 8);
5669 #ifdef FOUR_WORD_PLT
5670 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
5671 splt->contents + h->plt.offset + 12);
5672 #endif
5673
5674 /* Fill in the entry in the global offset table. */
5675 bfd_put_32 (output_bfd,
5676 (splt->output_section->vma
5677 + splt->output_offset),
5678 sgot->contents + got_offset);
5679
5680 /* Fill in the entry in the .rel.plt section. */
5681 rel.r_offset = (sgot->output_section->vma
5682 + sgot->output_offset
5683 + got_offset);
5684 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
5685 }
5686
5687 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
5688 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5689
5690 if (!h->def_regular)
5691 {
5692 /* Mark the symbol as undefined, rather than as defined in
5693 the .plt section. Leave the value alone. */
5694 sym->st_shndx = SHN_UNDEF;
5695 /* If the symbol is weak, we do need to clear the value.
5696 Otherwise, the PLT entry would provide a definition for
5697 the symbol even if the symbol wasn't defined anywhere,
5698 and so the symbol would never be NULL. */
5699 if (!h->ref_regular_nonweak)
5700 sym->st_value = 0;
5701 }
5702 }
5703
5704 if (h->got.offset != (bfd_vma) -1
5705 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
5706 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
5707 {
5708 asection * sgot;
5709 asection * srel;
5710 Elf_Internal_Rela rel;
5711 bfd_byte *loc;
5712
5713 /* This symbol has an entry in the global offset table. Set it
5714 up. */
5715 sgot = bfd_get_section_by_name (dynobj, ".got");
5716 srel = bfd_get_section_by_name (dynobj, ".rel.got");
5717 BFD_ASSERT (sgot != NULL && srel != NULL);
5718
5719 rel.r_offset = (sgot->output_section->vma
5720 + sgot->output_offset
5721 + (h->got.offset &~ (bfd_vma) 1));
5722
5723 /* If this is a static link, or it is a -Bsymbolic link and the
5724 symbol is defined locally or was forced to be local because
5725 of a version file, we just want to emit a RELATIVE reloc.
5726 The entry in the global offset table will already have been
5727 initialized in the relocate_section function. */
5728 if (info->shared
5729 && SYMBOL_REFERENCES_LOCAL (info, h))
5730 {
5731 BFD_ASSERT((h->got.offset & 1) != 0);
5732 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
5733 }
5734 else
5735 {
5736 BFD_ASSERT((h->got.offset & 1) == 0);
5737 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5738 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
5739 }
5740
5741 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
5742 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5743 }
5744
5745 if (h->needs_copy)
5746 {
5747 asection * s;
5748 Elf_Internal_Rela rel;
5749 bfd_byte *loc;
5750
5751 /* This symbol needs a copy reloc. Set it up. */
5752 BFD_ASSERT (h->dynindx != -1
5753 && (h->root.type == bfd_link_hash_defined
5754 || h->root.type == bfd_link_hash_defweak));
5755
5756 s = bfd_get_section_by_name (h->root.u.def.section->owner,
5757 ".rel.bss");
5758 BFD_ASSERT (s != NULL);
5759
5760 rel.r_offset = (h->root.u.def.value
5761 + h->root.u.def.section->output_section->vma
5762 + h->root.u.def.section->output_offset);
5763 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
5764 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
5765 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5766 }
5767
5768 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5769 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5770 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5771 sym->st_shndx = SHN_ABS;
5772
5773 return TRUE;
5774 }
5775
5776 /* Finish up the dynamic sections. */
5777
5778 static bfd_boolean
5779 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
5780 {
5781 bfd * dynobj;
5782 asection * sgot;
5783 asection * sdyn;
5784
5785 dynobj = elf_hash_table (info)->dynobj;
5786
5787 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
5788 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
5789 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5790
5791 if (elf_hash_table (info)->dynamic_sections_created)
5792 {
5793 asection *splt;
5794 Elf32_External_Dyn *dyncon, *dynconend;
5795 struct elf32_arm_link_hash_table *htab;
5796
5797 htab = elf32_arm_hash_table (info);
5798 splt = bfd_get_section_by_name (dynobj, ".plt");
5799 BFD_ASSERT (splt != NULL && sdyn != NULL);
5800
5801 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5802 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5803
5804 for (; dyncon < dynconend; dyncon++)
5805 {
5806 Elf_Internal_Dyn dyn;
5807 const char * name;
5808 asection * s;
5809
5810 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5811
5812 switch (dyn.d_tag)
5813 {
5814 unsigned int type;
5815
5816 default:
5817 break;
5818
5819 case DT_HASH:
5820 name = ".hash";
5821 goto get_vma_if_bpabi;
5822 case DT_STRTAB:
5823 name = ".dynstr";
5824 goto get_vma_if_bpabi;
5825 case DT_SYMTAB:
5826 name = ".dynsym";
5827 goto get_vma_if_bpabi;
5828 case DT_VERSYM:
5829 name = ".gnu.version";
5830 goto get_vma_if_bpabi;
5831 case DT_VERDEF:
5832 name = ".gnu.version_d";
5833 goto get_vma_if_bpabi;
5834 case DT_VERNEED:
5835 name = ".gnu.version_r";
5836 goto get_vma_if_bpabi;
5837
5838 case DT_PLTGOT:
5839 name = ".got";
5840 goto get_vma;
5841 case DT_JMPREL:
5842 name = ".rel.plt";
5843 get_vma:
5844 s = bfd_get_section_by_name (output_bfd, name);
5845 BFD_ASSERT (s != NULL);
5846 if (!htab->symbian_p)
5847 dyn.d_un.d_ptr = s->vma;
5848 else
5849 /* In the BPABI, tags in the PT_DYNAMIC section point
5850 at the file offset, not the memory address, for the
5851 convenience of the post linker. */
5852 dyn.d_un.d_ptr = s->filepos;
5853 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5854 break;
5855
5856 get_vma_if_bpabi:
5857 if (htab->symbian_p)
5858 goto get_vma;
5859 break;
5860
5861 case DT_PLTRELSZ:
5862 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5863 BFD_ASSERT (s != NULL);
5864 dyn.d_un.d_val = s->size;
5865 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5866 break;
5867
5868 case DT_RELSZ:
5869 if (!htab->symbian_p)
5870 {
5871 /* My reading of the SVR4 ABI indicates that the
5872 procedure linkage table relocs (DT_JMPREL) should be
5873 included in the overall relocs (DT_REL). This is
5874 what Solaris does. However, UnixWare can not handle
5875 that case. Therefore, we override the DT_RELSZ entry
5876 here to make it not include the JMPREL relocs. Since
5877 the linker script arranges for .rel.plt to follow all
5878 other relocation sections, we don't have to worry
5879 about changing the DT_REL entry. */
5880 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
5881 if (s != NULL)
5882 dyn.d_un.d_val -= s->size;
5883 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5884 break;
5885 }
5886 /* Fall through */
5887
5888 case DT_REL:
5889 case DT_RELA:
5890 case DT_RELASZ:
5891 /* In the BPABI, the DT_REL tag must point at the file
5892 offset, not the VMA, of the first relocation
5893 section. So, we use code similar to that in
5894 elflink.c, but do not check for SHF_ALLOC on the
5895 relcoation section, since relocations sections are
5896 never allocated under the BPABI. The comments above
5897 about Unixware notwithstanding, we include all of the
5898 relocations here. */
5899 if (htab->symbian_p)
5900 {
5901 unsigned int i;
5902 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
5903 ? SHT_REL : SHT_RELA);
5904 dyn.d_un.d_val = 0;
5905 for (i = 1; i < elf_numsections (output_bfd); i++)
5906 {
5907 Elf_Internal_Shdr *hdr
5908 = elf_elfsections (output_bfd)[i];
5909 if (hdr->sh_type == type)
5910 {
5911 if (dyn.d_tag == DT_RELSZ
5912 || dyn.d_tag == DT_RELASZ)
5913 dyn.d_un.d_val += hdr->sh_size;
5914 else if ((ufile_ptr) hdr->sh_offset
5915 <= dyn.d_un.d_val - 1)
5916 dyn.d_un.d_val = hdr->sh_offset;
5917 }
5918 }
5919 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5920 }
5921 break;
5922
5923 /* Set the bottom bit of DT_INIT/FINI if the
5924 corresponding function is Thumb. */
5925 case DT_INIT:
5926 name = info->init_function;
5927 goto get_sym;
5928 case DT_FINI:
5929 name = info->fini_function;
5930 get_sym:
5931 /* If it wasn't set by elf_bfd_final_link
5932 then there is nothing to adjust. */
5933 if (dyn.d_un.d_val != 0)
5934 {
5935 struct elf_link_hash_entry * eh;
5936
5937 eh = elf_link_hash_lookup (elf_hash_table (info), name,
5938 FALSE, FALSE, TRUE);
5939 if (eh != (struct elf_link_hash_entry *) NULL
5940 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
5941 {
5942 dyn.d_un.d_val |= 1;
5943 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5944 }
5945 }
5946 break;
5947 }
5948 }
5949
5950 /* Fill in the first entry in the procedure linkage table. */
5951 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
5952 {
5953 bfd_vma got_displacement;
5954
5955 /* Calculate the displacement between the PLT slot and &GOT[0]. */
5956 got_displacement = (sgot->output_section->vma
5957 + sgot->output_offset
5958 - splt->output_section->vma
5959 - splt->output_offset
5960 - 16);
5961
5962 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
5963 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
5964 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
5965 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
5966 #ifdef FOUR_WORD_PLT
5967 /* The displacement value goes in the otherwise-unused last word of
5968 the second entry. */
5969 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
5970 #else
5971 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
5972 #endif
5973 }
5974
5975 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5976 really seem like the right value. */
5977 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5978 }
5979
5980 /* Fill in the first three entries in the global offset table. */
5981 if (sgot)
5982 {
5983 if (sgot->size > 0)
5984 {
5985 if (sdyn == NULL)
5986 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5987 else
5988 bfd_put_32 (output_bfd,
5989 sdyn->output_section->vma + sdyn->output_offset,
5990 sgot->contents);
5991 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5992 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5993 }
5994
5995 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5996 }
5997
5998 return TRUE;
5999 }
6000
6001 static void
6002 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
6003 {
6004 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
6005 struct elf32_arm_link_hash_table *globals;
6006
6007 i_ehdrp = elf_elfheader (abfd);
6008
6009 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
6010 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
6011 else
6012 i_ehdrp->e_ident[EI_OSABI] = 0;
6013 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
6014
6015 if (link_info)
6016 {
6017 globals = elf32_arm_hash_table (link_info);
6018 if (globals->byteswap_code)
6019 i_ehdrp->e_flags |= EF_ARM_BE8;
6020 }
6021 }
6022
6023 static enum elf_reloc_type_class
6024 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
6025 {
6026 switch ((int) ELF32_R_TYPE (rela->r_info))
6027 {
6028 case R_ARM_RELATIVE:
6029 return reloc_class_relative;
6030 case R_ARM_JUMP_SLOT:
6031 return reloc_class_plt;
6032 case R_ARM_COPY:
6033 return reloc_class_copy;
6034 default:
6035 return reloc_class_normal;
6036 }
6037 }
6038
6039 /* Set the right machine number for an Arm ELF file. */
6040
6041 static bfd_boolean
6042 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
6043 {
6044 if (hdr->sh_type == SHT_NOTE)
6045 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
6046
6047 return TRUE;
6048 }
6049
6050 static void
6051 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6052 {
6053 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
6054 }
6055
6056 /* Return TRUE if this is an unwinding table entry. */
6057
6058 static bfd_boolean
6059 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
6060 {
6061 size_t len1, len2;
6062
6063 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
6064 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
6065 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
6066 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
6067 }
6068
6069
6070 /* Set the type and flags for an ARM section. We do this by
6071 the section name, which is a hack, but ought to work. */
6072
6073 static bfd_boolean
6074 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
6075 {
6076 const char * name;
6077
6078 name = bfd_get_section_name (abfd, sec);
6079
6080 if (is_arm_elf_unwind_section_name (abfd, name))
6081 {
6082 hdr->sh_type = SHT_ARM_EXIDX;
6083 hdr->sh_flags |= SHF_LINK_ORDER;
6084 }
6085 return TRUE;
6086 }
6087
6088 /* Handle an ARM specific section when reading an object file. This is
6089 called when bfd_section_from_shdr finds a section with an unknown
6090 type. */
6091
6092 static bfd_boolean
6093 elf32_arm_section_from_shdr (bfd *abfd,
6094 Elf_Internal_Shdr * hdr,
6095 const char *name,
6096 int shindex)
6097 {
6098 /* There ought to be a place to keep ELF backend specific flags, but
6099 at the moment there isn't one. We just keep track of the
6100 sections by their name, instead. Fortunately, the ABI gives
6101 names for all the ARM specific sections, so we will probably get
6102 away with this. */
6103 switch (hdr->sh_type)
6104 {
6105 case SHT_ARM_EXIDX:
6106 break;
6107
6108 default:
6109 return FALSE;
6110 }
6111
6112 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6113 return FALSE;
6114
6115 return TRUE;
6116 }
6117
6118 /* Called for each symbol. Builds a section map based on mapping symbols.
6119 Does not alter any of the symbols. */
6120
6121 static bfd_boolean
6122 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
6123 const char *name,
6124 Elf_Internal_Sym *elfsym,
6125 asection *input_sec,
6126 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
6127 {
6128 int mapcount;
6129 elf32_arm_section_map *map;
6130 struct elf32_arm_link_hash_table *globals;
6131
6132 /* Only do this on final link. */
6133 if (info->relocatable)
6134 return TRUE;
6135
6136 /* Only build a map if we need to byteswap code. */
6137 globals = elf32_arm_hash_table (info);
6138 if (!globals->byteswap_code)
6139 return TRUE;
6140
6141 /* We only want mapping symbols. */
6142 if (! bfd_is_arm_mapping_symbol_name (name))
6143 return TRUE;
6144
6145 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
6146 map = elf32_arm_section_data (input_sec)->map;
6147 /* TODO: This may be inefficient, but we probably don't usually have many
6148 mapping symbols per section. */
6149 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
6150 elf32_arm_section_data (input_sec)->map = map;
6151
6152 map[mapcount - 1].vma = elfsym->st_value;
6153 map[mapcount - 1].type = name[1];
6154 return TRUE;
6155 }
6156
6157
6158 /* Allocate target specific section data. */
6159
6160 static bfd_boolean
6161 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
6162 {
6163 struct _arm_elf_section_data *sdata;
6164 bfd_size_type amt = sizeof (*sdata);
6165
6166 sdata = bfd_zalloc (abfd, amt);
6167 if (sdata == NULL)
6168 return FALSE;
6169 sec->used_by_bfd = sdata;
6170
6171 return _bfd_elf_new_section_hook (abfd, sec);
6172 }
6173
6174
6175 /* Used to order a list of mapping symbols by address. */
6176
6177 static int
6178 elf32_arm_compare_mapping (const void * a, const void * b)
6179 {
6180 return ((const elf32_arm_section_map *) a)->vma
6181 > ((const elf32_arm_section_map *) b)->vma;
6182 }
6183
6184
6185 /* Do code byteswapping. Return FALSE afterwards so that the section is
6186 written out as normal. */
6187
6188 static bfd_boolean
6189 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
6190 bfd_byte *contents)
6191 {
6192 int mapcount;
6193 elf32_arm_section_map *map;
6194 bfd_vma ptr;
6195 bfd_vma end;
6196 bfd_vma offset;
6197 bfd_byte tmp;
6198 int i;
6199
6200 mapcount = elf32_arm_section_data (sec)->mapcount;
6201 map = elf32_arm_section_data (sec)->map;
6202
6203 if (mapcount == 0)
6204 return FALSE;
6205
6206 qsort (map, mapcount, sizeof (elf32_arm_section_map),
6207 elf32_arm_compare_mapping);
6208
6209 offset = sec->output_section->vma + sec->output_offset;
6210 ptr = map[0].vma - offset;
6211 for (i = 0; i < mapcount; i++)
6212 {
6213 if (i == mapcount - 1)
6214 end = sec->size;
6215 else
6216 end = map[i + 1].vma - offset;
6217
6218 switch (map[i].type)
6219 {
6220 case 'a':
6221 /* Byte swap code words. */
6222 while (ptr + 3 < end)
6223 {
6224 tmp = contents[ptr];
6225 contents[ptr] = contents[ptr + 3];
6226 contents[ptr + 3] = tmp;
6227 tmp = contents[ptr + 1];
6228 contents[ptr + 1] = contents[ptr + 2];
6229 contents[ptr + 2] = tmp;
6230 ptr += 4;
6231 }
6232 break;
6233
6234 case 't':
6235 /* Byte swap code halfwords. */
6236 while (ptr + 1 < end)
6237 {
6238 tmp = contents[ptr];
6239 contents[ptr] = contents[ptr + 1];
6240 contents[ptr + 1] = tmp;
6241 ptr += 2;
6242 }
6243 break;
6244
6245 case 'd':
6246 /* Leave data alone. */
6247 break;
6248 }
6249 ptr = end;
6250 }
6251 free (map);
6252 return FALSE;
6253 }
6254
6255 /* Display STT_ARM_TFUNC symbols as functions. */
6256
6257 static void
6258 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6259 asymbol *asym)
6260 {
6261 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6262
6263 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
6264 elfsym->symbol.flags |= BSF_FUNCTION;
6265 }
6266
6267
6268 /* Mangle thumb function symbols as we read them in. */
6269
6270 static void
6271 elf32_arm_swap_symbol_in (bfd * abfd,
6272 const void *psrc,
6273 const void *pshn,
6274 Elf_Internal_Sym *dst)
6275 {
6276 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
6277
6278 /* New EABI objects mark thumb function symbols by setting the low bit of
6279 the address. Turn these into STT_ARM_TFUNC. */
6280 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
6281 && (dst->st_value & 1))
6282 {
6283 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
6284 dst->st_value &= ~(bfd_vma) 1;
6285 }
6286 }
6287
6288
6289 /* Mangle thumb function symbols as we write them out. */
6290
6291 static void
6292 elf32_arm_swap_symbol_out (bfd *abfd,
6293 const Elf_Internal_Sym *src,
6294 void *cdst,
6295 void *shndx)
6296 {
6297 Elf_Internal_Sym newsym;
6298
6299 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
6300 of the address set, as per the new EABI. We do this unconditionally
6301 because objcopy does not set the elf header flags until after
6302 it writes out the symbol table. */
6303 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
6304 {
6305 newsym = *src;
6306 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
6307 newsym.st_value |= 1;
6308
6309 src = &newsym;
6310 }
6311 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
6312 }
6313
6314 /* Add the PT_ARM_EXIDX program header. */
6315
6316 static bfd_boolean
6317 elf32_arm_modify_segment_map (bfd *abfd,
6318 struct bfd_link_info *info ATTRIBUTE_UNUSED)
6319 {
6320 struct elf_segment_map *m;
6321 asection *sec;
6322
6323 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6324 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6325 {
6326 /* If there is already a PT_ARM_EXIDX header, then we do not
6327 want to add another one. This situation arises when running
6328 "strip"; the input binary already has the header. */
6329 m = elf_tdata (abfd)->segment_map;
6330 while (m && m->p_type != PT_ARM_EXIDX)
6331 m = m->next;
6332 if (!m)
6333 {
6334 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
6335 if (m == NULL)
6336 return FALSE;
6337 m->p_type = PT_ARM_EXIDX;
6338 m->count = 1;
6339 m->sections[0] = sec;
6340
6341 m->next = elf_tdata (abfd)->segment_map;
6342 elf_tdata (abfd)->segment_map = m;
6343 }
6344 }
6345
6346 return TRUE;
6347 }
6348
6349 /* We may add a PT_ARM_EXIDX program header. */
6350
6351 static int
6352 elf32_arm_additional_program_headers (bfd *abfd)
6353 {
6354 asection *sec;
6355
6356 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6357 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6358 return 1;
6359 else
6360 return 0;
6361 }
6362
6363 /* We use this to override swap_symbol_in and swap_symbol_out. */
6364 const struct elf_size_info elf32_arm_size_info = {
6365 sizeof (Elf32_External_Ehdr),
6366 sizeof (Elf32_External_Phdr),
6367 sizeof (Elf32_External_Shdr),
6368 sizeof (Elf32_External_Rel),
6369 sizeof (Elf32_External_Rela),
6370 sizeof (Elf32_External_Sym),
6371 sizeof (Elf32_External_Dyn),
6372 sizeof (Elf_External_Note),
6373 4,
6374 1,
6375 32, 2,
6376 ELFCLASS32, EV_CURRENT,
6377 bfd_elf32_write_out_phdrs,
6378 bfd_elf32_write_shdrs_and_ehdr,
6379 bfd_elf32_write_relocs,
6380 elf32_arm_swap_symbol_in,
6381 elf32_arm_swap_symbol_out,
6382 bfd_elf32_slurp_reloc_table,
6383 bfd_elf32_slurp_symbol_table,
6384 bfd_elf32_swap_dyn_in,
6385 bfd_elf32_swap_dyn_out,
6386 bfd_elf32_swap_reloc_in,
6387 bfd_elf32_swap_reloc_out,
6388 bfd_elf32_swap_reloca_in,
6389 bfd_elf32_swap_reloca_out
6390 };
6391
6392 #define ELF_ARCH bfd_arch_arm
6393 #define ELF_MACHINE_CODE EM_ARM
6394 #ifdef __QNXTARGET__
6395 #define ELF_MAXPAGESIZE 0x1000
6396 #else
6397 #define ELF_MAXPAGESIZE 0x8000
6398 #endif
6399 #define ELF_MINPAGESIZE 0x1000
6400
6401 #define bfd_elf32_mkobject elf32_arm_mkobject
6402
6403 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
6404 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
6405 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
6406 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
6407 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
6408 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
6409 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
6410 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
6411 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
6412
6413 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
6414 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
6415 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
6416 #define elf_backend_check_relocs elf32_arm_check_relocs
6417 #define elf_backend_relocate_section elf32_arm_relocate_section
6418 #define elf_backend_write_section elf32_arm_write_section
6419 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
6420 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
6421 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
6422 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
6423 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
6424 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
6425 #define elf_backend_post_process_headers elf32_arm_post_process_headers
6426 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
6427 #define elf_backend_object_p elf32_arm_object_p
6428 #define elf_backend_section_flags elf32_arm_section_flags
6429 #define elf_backend_fake_sections elf32_arm_fake_sections
6430 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
6431 #define elf_backend_final_write_processing elf32_arm_final_write_processing
6432 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
6433 #define elf_backend_symbol_processing elf32_arm_symbol_processing
6434 #define elf_backend_size_info elf32_arm_size_info
6435 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
6436 #define elf_backend_additional_program_headers \
6437 elf32_arm_additional_program_headers
6438
6439 #define elf_backend_can_refcount 1
6440 #define elf_backend_can_gc_sections 1
6441 #define elf_backend_plt_readonly 1
6442 #define elf_backend_want_got_plt 1
6443 #define elf_backend_want_plt_sym 0
6444 #define elf_backend_may_use_rel_p 1
6445 #define elf_backend_may_use_rela_p 0
6446 #define elf_backend_default_use_rela_p 0
6447 #define elf_backend_rela_normal 0
6448
6449 #define elf_backend_got_header_size 12
6450
6451 #include "elf32-target.h"
6452
6453 /* VxWorks Targets */
6454
6455 #undef TARGET_LITTLE_SYM
6456 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
6457 #undef TARGET_LITTLE_NAME
6458 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
6459 #undef TARGET_BIG_SYM
6460 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
6461 #undef TARGET_BIG_NAME
6462 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
6463
6464 /* Like elf32_arm_link_hash_table_create -- but overrides
6465 appropriately for VxWorks. */
6466 static struct bfd_link_hash_table *
6467 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
6468 {
6469 struct bfd_link_hash_table *ret;
6470
6471 ret = elf32_arm_link_hash_table_create (abfd);
6472 if (ret)
6473 {
6474 struct elf32_arm_link_hash_table *htab
6475 = (struct elf32_arm_link_hash_table *)ret;
6476 htab->use_rel = 0;
6477 }
6478 return ret;
6479 }
6480
6481 #undef elf32_bed
6482 #define elf32_bed elf32_arm_vxworks_bed
6483
6484 #undef bfd_elf32_bfd_link_hash_table_create
6485 #define bfd_elf32_bfd_link_hash_table_create \
6486 elf32_arm_vxworks_link_hash_table_create
6487
6488 #undef elf_backend_may_use_rel_p
6489 #define elf_backend_may_use_rel_p 0
6490 #undef elf_backend_may_use_rela_p
6491 #define elf_backend_may_use_rela_p 1
6492 #undef elf_backend_default_use_rela_p
6493 #define elf_backend_default_use_rela_p 1
6494 #undef elf_backend_rela_normal
6495 #define elf_backend_rela_normal 1
6496
6497 #include "elf32-target.h"
6498
6499
6500 /* Symbian OS Targets */
6501
6502 #undef TARGET_LITTLE_SYM
6503 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
6504 #undef TARGET_LITTLE_NAME
6505 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
6506 #undef TARGET_BIG_SYM
6507 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
6508 #undef TARGET_BIG_NAME
6509 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
6510
6511 /* Like elf32_arm_link_hash_table_create -- but overrides
6512 appropriately for Symbian OS. */
6513 static struct bfd_link_hash_table *
6514 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
6515 {
6516 struct bfd_link_hash_table *ret;
6517
6518 ret = elf32_arm_link_hash_table_create (abfd);
6519 if (ret)
6520 {
6521 struct elf32_arm_link_hash_table *htab
6522 = (struct elf32_arm_link_hash_table *)ret;
6523 /* There is no PLT header for Symbian OS. */
6524 htab->plt_header_size = 0;
6525 /* The PLT entries are each three instructions. */
6526 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
6527 htab->symbian_p = 1;
6528 /* Symbian uses armv5t or above, so use_blx is always true. */
6529 htab->use_blx = 1;
6530 htab->root.is_relocatable_executable = 1;
6531 }
6532 return ret;
6533 }
6534
6535 static struct bfd_elf_special_section const
6536 elf32_arm_symbian_special_sections[]=
6537 {
6538 /* In a BPABI executable, the dynamic linking sections do not go in
6539 the loadable read-only segment. The post-linker may wish to
6540 refer to these sections, but they are not part of the final
6541 program image. */
6542 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
6543 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
6544 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
6545 { ".got", 4, 0, SHT_PROGBITS, 0 },
6546 { ".hash", 5, 0, SHT_HASH, 0 },
6547 /* These sections do not need to be writable as the SymbianOS
6548 postlinker will arrange things so that no dynamic relocation is
6549 required. */
6550 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
6551 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
6552 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
6553 { NULL, 0, 0, 0, 0 }
6554 };
6555
6556 static void
6557 elf32_arm_symbian_begin_write_processing (bfd *abfd,
6558 struct bfd_link_info *link_info
6559 ATTRIBUTE_UNUSED)
6560 {
6561 /* BPABI objects are never loaded directly by an OS kernel; they are
6562 processed by a postlinker first, into an OS-specific format. If
6563 the D_PAGED bit is set on the file, BFD will align segments on
6564 page boundaries, so that an OS can directly map the file. With
6565 BPABI objects, that just results in wasted space. In addition,
6566 because we clear the D_PAGED bit, map_sections_to_segments will
6567 recognize that the program headers should not be mapped into any
6568 loadable segment. */
6569 abfd->flags &= ~D_PAGED;
6570 }
6571
6572 static bfd_boolean
6573 elf32_arm_symbian_modify_segment_map (bfd *abfd,
6574 struct bfd_link_info *info)
6575 {
6576 struct elf_segment_map *m;
6577 asection *dynsec;
6578
6579 /* BPABI shared libraries and executables should have a PT_DYNAMIC
6580 segment. However, because the .dynamic section is not marked
6581 with SEC_LOAD, the generic ELF code will not create such a
6582 segment. */
6583 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
6584 if (dynsec)
6585 {
6586 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
6587 m->next = elf_tdata (abfd)->segment_map;
6588 elf_tdata (abfd)->segment_map = m;
6589 }
6590
6591 /* Also call the generic arm routine. */
6592 return elf32_arm_modify_segment_map (abfd, info);
6593 }
6594
6595 #undef elf32_bed
6596 #define elf32_bed elf32_arm_symbian_bed
6597
6598 /* The dynamic sections are not allocated on SymbianOS; the postlinker
6599 will process them and then discard them. */
6600 #undef ELF_DYNAMIC_SEC_FLAGS
6601 #define ELF_DYNAMIC_SEC_FLAGS \
6602 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
6603
6604 #undef bfd_elf32_bfd_link_hash_table_create
6605 #define bfd_elf32_bfd_link_hash_table_create \
6606 elf32_arm_symbian_link_hash_table_create
6607
6608 #undef elf_backend_special_sections
6609 #define elf_backend_special_sections elf32_arm_symbian_special_sections
6610
6611 #undef elf_backend_begin_write_processing
6612 #define elf_backend_begin_write_processing \
6613 elf32_arm_symbian_begin_write_processing
6614
6615 #undef elf_backend_modify_segment_map
6616 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
6617
6618 /* There is no .got section for BPABI objects, and hence no header. */
6619 #undef elf_backend_got_header_size
6620 #define elf_backend_got_header_size 0
6621
6622 /* Similarly, there is no .got.plt section. */
6623 #undef elf_backend_want_got_plt
6624 #define elf_backend_want_got_plt 0
6625
6626 #undef elf_backend_may_use_rel_p
6627 #define elf_backend_may_use_rel_p 1
6628 #undef elf_backend_may_use_rela_p
6629 #define elf_backend_may_use_rela_p 0
6630 #undef elf_backend_default_use_rela_p
6631 #define elf_backend_default_use_rela_p 0
6632 #undef elf_backend_rela_normal
6633 #define elf_backend_rela_normal 0
6634
6635 #include "elf32-target.h"