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[deliverable/binutils-gdb.git] / bfd / elf32-arm.c
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
38 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
39 in that slot. */
40
41 static reloc_howto_type elf32_arm_howto_table_1[] =
42 {
43 /* No relocation */
44 HOWTO (R_ARM_NONE, /* type */
45 0, /* rightshift */
46 0, /* size (0 = byte, 1 = short, 2 = long) */
47 0, /* bitsize */
48 FALSE, /* pc_relative */
49 0, /* bitpos */
50 complain_overflow_dont,/* complain_on_overflow */
51 bfd_elf_generic_reloc, /* special_function */
52 "R_ARM_NONE", /* name */
53 FALSE, /* partial_inplace */
54 0, /* src_mask */
55 0, /* dst_mask */
56 FALSE), /* pcrel_offset */
57
58 HOWTO (R_ARM_PC24, /* type */
59 2, /* rightshift */
60 2, /* size (0 = byte, 1 = short, 2 = long) */
61 24, /* bitsize */
62 TRUE, /* pc_relative */
63 0, /* bitpos */
64 complain_overflow_signed,/* complain_on_overflow */
65 bfd_elf_generic_reloc, /* special_function */
66 "R_ARM_PC24", /* name */
67 FALSE, /* partial_inplace */
68 0x00ffffff, /* src_mask */
69 0x00ffffff, /* dst_mask */
70 TRUE), /* pcrel_offset */
71
72 /* 32 bit absolute */
73 HOWTO (R_ARM_ABS32, /* type */
74 0, /* rightshift */
75 2, /* size (0 = byte, 1 = short, 2 = long) */
76 32, /* bitsize */
77 FALSE, /* pc_relative */
78 0, /* bitpos */
79 complain_overflow_bitfield,/* complain_on_overflow */
80 bfd_elf_generic_reloc, /* special_function */
81 "R_ARM_ABS32", /* name */
82 FALSE, /* partial_inplace */
83 0xffffffff, /* src_mask */
84 0xffffffff, /* dst_mask */
85 FALSE), /* pcrel_offset */
86
87 /* standard 32bit pc-relative reloc */
88 HOWTO (R_ARM_REL32, /* type */
89 0, /* rightshift */
90 2, /* size (0 = byte, 1 = short, 2 = long) */
91 32, /* bitsize */
92 TRUE, /* pc_relative */
93 0, /* bitpos */
94 complain_overflow_bitfield,/* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_ARM_REL32", /* name */
97 FALSE, /* partial_inplace */
98 0xffffffff, /* src_mask */
99 0xffffffff, /* dst_mask */
100 TRUE), /* pcrel_offset */
101
102 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
103 HOWTO (R_ARM_PC13, /* type */
104 0, /* rightshift */
105 0, /* size (0 = byte, 1 = short, 2 = long) */
106 8, /* bitsize */
107 FALSE, /* pc_relative */
108 0, /* bitpos */
109 complain_overflow_bitfield,/* complain_on_overflow */
110 bfd_elf_generic_reloc, /* special_function */
111 "R_ARM_PC13", /* name */
112 FALSE, /* partial_inplace */
113 0x000000ff, /* src_mask */
114 0x000000ff, /* dst_mask */
115 FALSE), /* pcrel_offset */
116
117 /* 16 bit absolute */
118 HOWTO (R_ARM_ABS16, /* type */
119 0, /* rightshift */
120 1, /* size (0 = byte, 1 = short, 2 = long) */
121 16, /* bitsize */
122 FALSE, /* pc_relative */
123 0, /* bitpos */
124 complain_overflow_bitfield,/* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_ARM_ABS16", /* name */
127 FALSE, /* partial_inplace */
128 0x0000ffff, /* src_mask */
129 0x0000ffff, /* dst_mask */
130 FALSE), /* pcrel_offset */
131
132 /* 12 bit absolute */
133 HOWTO (R_ARM_ABS12, /* type */
134 0, /* rightshift */
135 2, /* size (0 = byte, 1 = short, 2 = long) */
136 12, /* bitsize */
137 FALSE, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_bitfield,/* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_ARM_ABS12", /* name */
142 FALSE, /* partial_inplace */
143 0x000008ff, /* src_mask */
144 0x000008ff, /* dst_mask */
145 FALSE), /* pcrel_offset */
146
147 HOWTO (R_ARM_THM_ABS5, /* type */
148 6, /* rightshift */
149 1, /* size (0 = byte, 1 = short, 2 = long) */
150 5, /* bitsize */
151 FALSE, /* pc_relative */
152 0, /* bitpos */
153 complain_overflow_bitfield,/* complain_on_overflow */
154 bfd_elf_generic_reloc, /* special_function */
155 "R_ARM_THM_ABS5", /* name */
156 FALSE, /* partial_inplace */
157 0x000007e0, /* src_mask */
158 0x000007e0, /* dst_mask */
159 FALSE), /* pcrel_offset */
160
161 /* 8 bit absolute */
162 HOWTO (R_ARM_ABS8, /* type */
163 0, /* rightshift */
164 0, /* size (0 = byte, 1 = short, 2 = long) */
165 8, /* bitsize */
166 FALSE, /* pc_relative */
167 0, /* bitpos */
168 complain_overflow_bitfield,/* complain_on_overflow */
169 bfd_elf_generic_reloc, /* special_function */
170 "R_ARM_ABS8", /* name */
171 FALSE, /* partial_inplace */
172 0x000000ff, /* src_mask */
173 0x000000ff, /* dst_mask */
174 FALSE), /* pcrel_offset */
175
176 HOWTO (R_ARM_SBREL32, /* type */
177 0, /* rightshift */
178 2, /* size (0 = byte, 1 = short, 2 = long) */
179 32, /* bitsize */
180 FALSE, /* pc_relative */
181 0, /* bitpos */
182 complain_overflow_dont,/* complain_on_overflow */
183 bfd_elf_generic_reloc, /* special_function */
184 "R_ARM_SBREL32", /* name */
185 FALSE, /* partial_inplace */
186 0xffffffff, /* src_mask */
187 0xffffffff, /* dst_mask */
188 FALSE), /* pcrel_offset */
189
190 /* FIXME: Has two more bits of offset in Thumb32. */
191 HOWTO (R_ARM_THM_CALL, /* type */
192 1, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 23, /* bitsize */
195 TRUE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_signed,/* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_ARM_THM_CALL", /* name */
200 FALSE, /* partial_inplace */
201 0x07ff07ff, /* src_mask */
202 0x07ff07ff, /* dst_mask */
203 TRUE), /* pcrel_offset */
204
205 HOWTO (R_ARM_THM_PC8, /* type */
206 1, /* rightshift */
207 1, /* size (0 = byte, 1 = short, 2 = long) */
208 8, /* bitsize */
209 TRUE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_signed,/* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_ARM_THM_PC8", /* name */
214 FALSE, /* partial_inplace */
215 0x000000ff, /* src_mask */
216 0x000000ff, /* dst_mask */
217 TRUE), /* pcrel_offset */
218
219 HOWTO (R_ARM_BREL_ADJ, /* type */
220 1, /* rightshift */
221 1, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed,/* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_ARM_BREL_ADJ", /* name */
228 FALSE, /* partial_inplace */
229 0xffffffff, /* src_mask */
230 0xffffffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 HOWTO (R_ARM_SWI24, /* type */
234 0, /* rightshift */
235 0, /* size (0 = byte, 1 = short, 2 = long) */
236 0, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_signed,/* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_ARM_SWI24", /* name */
242 FALSE, /* partial_inplace */
243 0x00000000, /* src_mask */
244 0x00000000, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 HOWTO (R_ARM_THM_SWI8, /* type */
248 0, /* rightshift */
249 0, /* size (0 = byte, 1 = short, 2 = long) */
250 0, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_signed,/* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_ARM_SWI8", /* name */
256 FALSE, /* partial_inplace */
257 0x00000000, /* src_mask */
258 0x00000000, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* BLX instruction for the ARM. */
262 HOWTO (R_ARM_XPC25, /* type */
263 2, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 25, /* bitsize */
266 TRUE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_signed,/* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_ARM_XPC25", /* name */
271 FALSE, /* partial_inplace */
272 0x00ffffff, /* src_mask */
273 0x00ffffff, /* dst_mask */
274 TRUE), /* pcrel_offset */
275
276 /* BLX instruction for the Thumb. */
277 HOWTO (R_ARM_THM_XPC22, /* type */
278 2, /* rightshift */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
280 22, /* bitsize */
281 TRUE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_signed,/* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_ARM_THM_XPC22", /* name */
286 FALSE, /* partial_inplace */
287 0x07ff07ff, /* src_mask */
288 0x07ff07ff, /* dst_mask */
289 TRUE), /* pcrel_offset */
290
291 /* Dynamic TLS relocations. */
292
293 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
294 0, /* rightshift */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
296 32, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield,/* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_ARM_TLS_DTPMOD32", /* name */
302 TRUE, /* partial_inplace */
303 0xffffffff, /* src_mask */
304 0xffffffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 HOWTO (R_ARM_TLS_DTPOFF32, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 32, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield,/* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_ARM_TLS_DTPOFF32", /* name */
316 TRUE, /* partial_inplace */
317 0xffffffff, /* src_mask */
318 0xffffffff, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 HOWTO (R_ARM_TLS_TPOFF32, /* type */
322 0, /* rightshift */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
324 32, /* bitsize */
325 FALSE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_bitfield,/* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_ARM_TLS_TPOFF32", /* name */
330 TRUE, /* partial_inplace */
331 0xffffffff, /* src_mask */
332 0xffffffff, /* dst_mask */
333 FALSE), /* pcrel_offset */
334
335 /* Relocs used in ARM Linux */
336
337 HOWTO (R_ARM_COPY, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 32, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield,/* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_ARM_COPY", /* name */
346 TRUE, /* partial_inplace */
347 0xffffffff, /* src_mask */
348 0xffffffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 HOWTO (R_ARM_GLOB_DAT, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 32, /* bitsize */
355 FALSE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_bitfield,/* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_ARM_GLOB_DAT", /* name */
360 TRUE, /* partial_inplace */
361 0xffffffff, /* src_mask */
362 0xffffffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 HOWTO (R_ARM_JUMP_SLOT, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 32, /* bitsize */
369 FALSE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_bitfield,/* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_ARM_JUMP_SLOT", /* name */
374 TRUE, /* partial_inplace */
375 0xffffffff, /* src_mask */
376 0xffffffff, /* dst_mask */
377 FALSE), /* pcrel_offset */
378
379 HOWTO (R_ARM_RELATIVE, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 32, /* bitsize */
383 FALSE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_bitfield,/* complain_on_overflow */
386 bfd_elf_generic_reloc, /* special_function */
387 "R_ARM_RELATIVE", /* name */
388 TRUE, /* partial_inplace */
389 0xffffffff, /* src_mask */
390 0xffffffff, /* dst_mask */
391 FALSE), /* pcrel_offset */
392
393 HOWTO (R_ARM_GOTOFF32, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 32, /* bitsize */
397 FALSE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_bitfield,/* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_ARM_GOTOFF32", /* name */
402 TRUE, /* partial_inplace */
403 0xffffffff, /* src_mask */
404 0xffffffff, /* dst_mask */
405 FALSE), /* pcrel_offset */
406
407 HOWTO (R_ARM_GOTPC, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 32, /* bitsize */
411 TRUE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_bitfield,/* complain_on_overflow */
414 bfd_elf_generic_reloc, /* special_function */
415 "R_ARM_GOTPC", /* name */
416 TRUE, /* partial_inplace */
417 0xffffffff, /* src_mask */
418 0xffffffff, /* dst_mask */
419 TRUE), /* pcrel_offset */
420
421 HOWTO (R_ARM_GOT32, /* type */
422 0, /* rightshift */
423 2, /* size (0 = byte, 1 = short, 2 = long) */
424 32, /* bitsize */
425 FALSE, /* pc_relative */
426 0, /* bitpos */
427 complain_overflow_bitfield,/* complain_on_overflow */
428 bfd_elf_generic_reloc, /* special_function */
429 "R_ARM_GOT32", /* name */
430 TRUE, /* partial_inplace */
431 0xffffffff, /* src_mask */
432 0xffffffff, /* dst_mask */
433 FALSE), /* pcrel_offset */
434
435 HOWTO (R_ARM_PLT32, /* type */
436 2, /* rightshift */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
438 26, /* bitsize */
439 TRUE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_bitfield,/* complain_on_overflow */
442 bfd_elf_generic_reloc, /* special_function */
443 "R_ARM_PLT32", /* name */
444 TRUE, /* partial_inplace */
445 0x00ffffff, /* src_mask */
446 0x00ffffff, /* dst_mask */
447 TRUE), /* pcrel_offset */
448
449 HOWTO (R_ARM_CALL, /* type */
450 2, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 24, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed,/* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_ARM_CALL", /* name */
458 FALSE, /* partial_inplace */
459 0x00ffffff, /* src_mask */
460 0x00ffffff, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 HOWTO (R_ARM_JUMP24, /* type */
464 2, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 24, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed,/* complain_on_overflow */
470 bfd_elf_generic_reloc, /* special_function */
471 "R_ARM_JUMP24", /* name */
472 FALSE, /* partial_inplace */
473 0x00ffffff, /* src_mask */
474 0x00ffffff, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 HOWTO (R_ARM_THM_JUMP24, /* type */
478 1, /* rightshift */
479 2, /* size (0 = byte, 1 = short, 2 = long) */
480 24, /* bitsize */
481 TRUE, /* pc_relative */
482 0, /* bitpos */
483 complain_overflow_signed,/* complain_on_overflow */
484 bfd_elf_generic_reloc, /* special_function */
485 "R_ARM_THM_JUMP24", /* name */
486 FALSE, /* partial_inplace */
487 0x07ff2fff, /* src_mask */
488 0x07ff2fff, /* dst_mask */
489 TRUE), /* pcrel_offset */
490
491 HOWTO (R_ARM_BASE_ABS, /* type */
492 0, /* rightshift */
493 2, /* size (0 = byte, 1 = short, 2 = long) */
494 32, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_dont,/* complain_on_overflow */
498 bfd_elf_generic_reloc, /* special_function */
499 "R_ARM_BASE_ABS", /* name */
500 FALSE, /* partial_inplace */
501 0xffffffff, /* src_mask */
502 0xffffffff, /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
506 0, /* rightshift */
507 2, /* size (0 = byte, 1 = short, 2 = long) */
508 12, /* bitsize */
509 TRUE, /* pc_relative */
510 0, /* bitpos */
511 complain_overflow_dont,/* complain_on_overflow */
512 bfd_elf_generic_reloc, /* special_function */
513 "R_ARM_ALU_PCREL_7_0", /* name */
514 FALSE, /* partial_inplace */
515 0x00000fff, /* src_mask */
516 0x00000fff, /* dst_mask */
517 TRUE), /* pcrel_offset */
518
519 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
520 0, /* rightshift */
521 2, /* size (0 = byte, 1 = short, 2 = long) */
522 12, /* bitsize */
523 TRUE, /* pc_relative */
524 8, /* bitpos */
525 complain_overflow_dont,/* complain_on_overflow */
526 bfd_elf_generic_reloc, /* special_function */
527 "R_ARM_ALU_PCREL_15_8",/* name */
528 FALSE, /* partial_inplace */
529 0x00000fff, /* src_mask */
530 0x00000fff, /* dst_mask */
531 TRUE), /* pcrel_offset */
532
533 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 12, /* bitsize */
537 TRUE, /* pc_relative */
538 16, /* bitpos */
539 complain_overflow_dont,/* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_ARM_ALU_PCREL_23_15",/* name */
542 FALSE, /* partial_inplace */
543 0x00000fff, /* src_mask */
544 0x00000fff, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
548 0, /* rightshift */
549 2, /* size (0 = byte, 1 = short, 2 = long) */
550 12, /* bitsize */
551 FALSE, /* pc_relative */
552 0, /* bitpos */
553 complain_overflow_dont,/* complain_on_overflow */
554 bfd_elf_generic_reloc, /* special_function */
555 "R_ARM_LDR_SBREL_11_0",/* name */
556 FALSE, /* partial_inplace */
557 0x00000fff, /* src_mask */
558 0x00000fff, /* dst_mask */
559 FALSE), /* pcrel_offset */
560
561 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
562 0, /* rightshift */
563 2, /* size (0 = byte, 1 = short, 2 = long) */
564 8, /* bitsize */
565 FALSE, /* pc_relative */
566 12, /* bitpos */
567 complain_overflow_dont,/* complain_on_overflow */
568 bfd_elf_generic_reloc, /* special_function */
569 "R_ARM_ALU_SBREL_19_12",/* name */
570 FALSE, /* partial_inplace */
571 0x000ff000, /* src_mask */
572 0x000ff000, /* dst_mask */
573 FALSE), /* pcrel_offset */
574
575 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
576 0, /* rightshift */
577 2, /* size (0 = byte, 1 = short, 2 = long) */
578 8, /* bitsize */
579 FALSE, /* pc_relative */
580 20, /* bitpos */
581 complain_overflow_dont,/* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_ARM_ALU_SBREL_27_20",/* name */
584 FALSE, /* partial_inplace */
585 0x0ff00000, /* src_mask */
586 0x0ff00000, /* dst_mask */
587 FALSE), /* pcrel_offset */
588
589 HOWTO (R_ARM_TARGET1, /* type */
590 0, /* rightshift */
591 2, /* size (0 = byte, 1 = short, 2 = long) */
592 32, /* bitsize */
593 FALSE, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_dont,/* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_ARM_TARGET1", /* name */
598 FALSE, /* partial_inplace */
599 0xffffffff, /* src_mask */
600 0xffffffff, /* dst_mask */
601 FALSE), /* pcrel_offset */
602
603 HOWTO (R_ARM_ROSEGREL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 FALSE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont,/* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_ARM_ROSEGREL32", /* name */
612 FALSE, /* partial_inplace */
613 0xffffffff, /* src_mask */
614 0xffffffff, /* dst_mask */
615 FALSE), /* pcrel_offset */
616
617 HOWTO (R_ARM_V4BX, /* type */
618 0, /* rightshift */
619 2, /* size (0 = byte, 1 = short, 2 = long) */
620 32, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_dont,/* complain_on_overflow */
624 bfd_elf_generic_reloc, /* special_function */
625 "R_ARM_V4BX", /* name */
626 FALSE, /* partial_inplace */
627 0xffffffff, /* src_mask */
628 0xffffffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 HOWTO (R_ARM_TARGET2, /* type */
632 0, /* rightshift */
633 2, /* size (0 = byte, 1 = short, 2 = long) */
634 32, /* bitsize */
635 FALSE, /* pc_relative */
636 0, /* bitpos */
637 complain_overflow_signed,/* complain_on_overflow */
638 bfd_elf_generic_reloc, /* special_function */
639 "R_ARM_TARGET2", /* name */
640 FALSE, /* partial_inplace */
641 0xffffffff, /* src_mask */
642 0xffffffff, /* dst_mask */
643 TRUE), /* pcrel_offset */
644
645 HOWTO (R_ARM_PREL31, /* type */
646 0, /* rightshift */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
648 31, /* bitsize */
649 TRUE, /* pc_relative */
650 0, /* bitpos */
651 complain_overflow_signed,/* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_ARM_PREL31", /* name */
654 FALSE, /* partial_inplace */
655 0x7fffffff, /* src_mask */
656 0x7fffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
658
659 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
660 0, /* rightshift */
661 2, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_dont,/* complain_on_overflow */
666 bfd_elf_generic_reloc, /* special_function */
667 "R_ARM_MOVW_ABS_NC", /* name */
668 FALSE, /* partial_inplace */
669 0x0000ffff, /* src_mask */
670 0x0000ffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 HOWTO (R_ARM_MOVT_ABS, /* type */
674 0, /* rightshift */
675 2, /* size (0 = byte, 1 = short, 2 = long) */
676 16, /* bitsize */
677 FALSE, /* pc_relative */
678 0, /* bitpos */
679 complain_overflow_bitfield,/* complain_on_overflow */
680 bfd_elf_generic_reloc, /* special_function */
681 "R_ARM_MOVT_ABS", /* name */
682 FALSE, /* partial_inplace */
683 0x0000ffff, /* src_mask */
684 0x0000ffff, /* dst_mask */
685 FALSE), /* pcrel_offset */
686
687 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
688 0, /* rightshift */
689 2, /* size (0 = byte, 1 = short, 2 = long) */
690 16, /* bitsize */
691 TRUE, /* pc_relative */
692 0, /* bitpos */
693 complain_overflow_dont,/* complain_on_overflow */
694 bfd_elf_generic_reloc, /* special_function */
695 "R_ARM_MOVW_PREL_NC", /* name */
696 FALSE, /* partial_inplace */
697 0x0000ffff, /* src_mask */
698 0x0000ffff, /* dst_mask */
699 TRUE), /* pcrel_offset */
700
701 HOWTO (R_ARM_MOVT_PREL, /* type */
702 0, /* rightshift */
703 2, /* size (0 = byte, 1 = short, 2 = long) */
704 16, /* bitsize */
705 TRUE, /* pc_relative */
706 0, /* bitpos */
707 complain_overflow_bitfield,/* complain_on_overflow */
708 bfd_elf_generic_reloc, /* special_function */
709 "R_ARM_MOVT_PREL", /* name */
710 FALSE, /* partial_inplace */
711 0x0000ffff, /* src_mask */
712 0x0000ffff, /* dst_mask */
713 TRUE), /* pcrel_offset */
714
715 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
716 0, /* rightshift */
717 2, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_dont,/* complain_on_overflow */
722 bfd_elf_generic_reloc, /* special_function */
723 "R_ARM_THM_MOVW_ABS_NC",/* name */
724 FALSE, /* partial_inplace */
725 0x040f70ff, /* src_mask */
726 0x040f70ff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
730 0, /* rightshift */
731 2, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_bitfield,/* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_ARM_THM_MOVT_ABS", /* name */
738 FALSE, /* partial_inplace */
739 0x040f70ff, /* src_mask */
740 0x040f70ff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
744 0, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 TRUE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont,/* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_ARM_THM_MOVW_PREL_NC",/* name */
752 FALSE, /* partial_inplace */
753 0x040f70ff, /* src_mask */
754 0x040f70ff, /* dst_mask */
755 TRUE), /* pcrel_offset */
756
757 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
758 0, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 16, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_bitfield,/* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_ARM_THM_MOVT_PREL", /* name */
766 FALSE, /* partial_inplace */
767 0x040f70ff, /* src_mask */
768 0x040f70ff, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 HOWTO (R_ARM_THM_JUMP19, /* type */
772 1, /* rightshift */
773 2, /* size (0 = byte, 1 = short, 2 = long) */
774 19, /* bitsize */
775 TRUE, /* pc_relative */
776 0, /* bitpos */
777 complain_overflow_signed,/* complain_on_overflow */
778 bfd_elf_generic_reloc, /* special_function */
779 "R_ARM_THM_JUMP19", /* name */
780 FALSE, /* partial_inplace */
781 0x043f2fff, /* src_mask */
782 0x043f2fff, /* dst_mask */
783 TRUE), /* pcrel_offset */
784
785 HOWTO (R_ARM_THM_JUMP6, /* type */
786 1, /* rightshift */
787 1, /* size (0 = byte, 1 = short, 2 = long) */
788 6, /* bitsize */
789 TRUE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_unsigned,/* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_ARM_THM_JUMP6", /* name */
794 FALSE, /* partial_inplace */
795 0x02f8, /* src_mask */
796 0x02f8, /* dst_mask */
797 TRUE), /* pcrel_offset */
798
799 /* These are declared as 13-bit signed relocations because we can
800 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
801 versa. */
802 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 13, /* bitsize */
806 TRUE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_signed,/* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_ARM_THM_ALU_PREL_11_0",/* name */
811 FALSE, /* partial_inplace */
812 0x040070ff, /* src_mask */
813 0x040070ff, /* dst_mask */
814 TRUE), /* pcrel_offset */
815
816 HOWTO (R_ARM_THM_PC12, /* type */
817 0, /* rightshift */
818 2, /* size (0 = byte, 1 = short, 2 = long) */
819 13, /* bitsize */
820 TRUE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_signed,/* complain_on_overflow */
823 bfd_elf_generic_reloc, /* special_function */
824 "R_ARM_THM_PC12", /* name */
825 FALSE, /* partial_inplace */
826 0x040070ff, /* src_mask */
827 0x040070ff, /* dst_mask */
828 TRUE), /* pcrel_offset */
829
830 HOWTO (R_ARM_ABS32_NOI, /* type */
831 0, /* rightshift */
832 2, /* size (0 = byte, 1 = short, 2 = long) */
833 32, /* bitsize */
834 FALSE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_dont,/* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_ARM_ABS32_NOI", /* name */
839 FALSE, /* partial_inplace */
840 0xffffffff, /* src_mask */
841 0xffffffff, /* dst_mask */
842 FALSE), /* pcrel_offset */
843
844 HOWTO (R_ARM_REL32_NOI, /* type */
845 0, /* rightshift */
846 2, /* size (0 = byte, 1 = short, 2 = long) */
847 32, /* bitsize */
848 TRUE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont,/* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 "R_ARM_REL32_NOI", /* name */
853 FALSE, /* partial_inplace */
854 0xffffffff, /* src_mask */
855 0xffffffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857 };
858
859 /* Relocations 57 .. 83 are the "group relocations" which we do not
860 support. */
861
862 static reloc_howto_type elf32_arm_howto_table_2[] =
863 {
864 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
865 0, /* rightshift */
866 2, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 FALSE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont,/* complain_on_overflow */
871 bfd_elf_generic_reloc, /* special_function */
872 "R_ARM_MOVW_BREL_NC", /* name */
873 FALSE, /* partial_inplace */
874 0x0000ffff, /* src_mask */
875 0x0000ffff, /* dst_mask */
876 FALSE), /* pcrel_offset */
877
878 HOWTO (R_ARM_MOVT_BREL, /* type */
879 0, /* rightshift */
880 2, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_bitfield,/* complain_on_overflow */
885 bfd_elf_generic_reloc, /* special_function */
886 "R_ARM_MOVT_BREL", /* name */
887 FALSE, /* partial_inplace */
888 0x0000ffff, /* src_mask */
889 0x0000ffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 HOWTO (R_ARM_MOVW_BREL, /* type */
893 0, /* rightshift */
894 2, /* size (0 = byte, 1 = short, 2 = long) */
895 16, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont,/* complain_on_overflow */
899 bfd_elf_generic_reloc, /* special_function */
900 "R_ARM_MOVW_BREL", /* name */
901 FALSE, /* partial_inplace */
902 0x0000ffff, /* src_mask */
903 0x0000ffff, /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
907 0, /* rightshift */
908 2, /* size (0 = byte, 1 = short, 2 = long) */
909 16, /* bitsize */
910 FALSE, /* pc_relative */
911 0, /* bitpos */
912 complain_overflow_dont,/* complain_on_overflow */
913 bfd_elf_generic_reloc, /* special_function */
914 "R_ARM_THM_MOVW_BREL_NC",/* name */
915 FALSE, /* partial_inplace */
916 0x040f70ff, /* src_mask */
917 0x040f70ff, /* dst_mask */
918 FALSE), /* pcrel_offset */
919
920 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
921 0, /* rightshift */
922 2, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_bitfield,/* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_ARM_THM_MOVT_BREL", /* name */
929 FALSE, /* partial_inplace */
930 0x040f70ff, /* src_mask */
931 0x040f70ff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
935 0, /* rightshift */
936 2, /* size (0 = byte, 1 = short, 2 = long) */
937 16, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont,/* complain_on_overflow */
941 bfd_elf_generic_reloc, /* special_function */
942 "R_ARM_THM_MOVW_BREL", /* name */
943 FALSE, /* partial_inplace */
944 0x040f70ff, /* src_mask */
945 0x040f70ff, /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 EMPTY_HOWTO (90), /* unallocated */
949 EMPTY_HOWTO (91),
950 EMPTY_HOWTO (92),
951 EMPTY_HOWTO (93),
952
953 HOWTO (R_ARM_PLT32_ABS, /* type */
954 0, /* rightshift */
955 2, /* size (0 = byte, 1 = short, 2 = long) */
956 32, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_dont,/* complain_on_overflow */
960 bfd_elf_generic_reloc, /* special_function */
961 "R_ARM_PLT32_ABS", /* name */
962 FALSE, /* partial_inplace */
963 0xffffffff, /* src_mask */
964 0xffffffff, /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 HOWTO (R_ARM_GOT_ABS, /* type */
968 0, /* rightshift */
969 2, /* size (0 = byte, 1 = short, 2 = long) */
970 32, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont,/* complain_on_overflow */
974 bfd_elf_generic_reloc, /* special_function */
975 "R_ARM_GOT_ABS", /* name */
976 FALSE, /* partial_inplace */
977 0xffffffff, /* src_mask */
978 0xffffffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 HOWTO (R_ARM_GOT_PREL, /* type */
982 0, /* rightshift */
983 2, /* size (0 = byte, 1 = short, 2 = long) */
984 32, /* bitsize */
985 TRUE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 bfd_elf_generic_reloc, /* special_function */
989 "R_ARM_GOT_PREL", /* name */
990 FALSE, /* partial_inplace */
991 0xffffffff, /* src_mask */
992 0xffffffff, /* dst_mask */
993 TRUE), /* pcrel_offset */
994
995 HOWTO (R_ARM_GOT_BREL12, /* type */
996 0, /* rightshift */
997 2, /* size (0 = byte, 1 = short, 2 = long) */
998 12, /* bitsize */
999 FALSE, /* pc_relative */
1000 0, /* bitpos */
1001 complain_overflow_bitfield,/* complain_on_overflow */
1002 bfd_elf_generic_reloc, /* special_function */
1003 "R_ARM_GOT_BREL12", /* name */
1004 FALSE, /* partial_inplace */
1005 0x00000fff, /* src_mask */
1006 0x00000fff, /* dst_mask */
1007 FALSE), /* pcrel_offset */
1008
1009 HOWTO (R_ARM_GOTOFF12, /* type */
1010 0, /* rightshift */
1011 2, /* size (0 = byte, 1 = short, 2 = long) */
1012 12, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_bitfield,/* complain_on_overflow */
1016 bfd_elf_generic_reloc, /* special_function */
1017 "R_ARM_GOTOFF12", /* name */
1018 FALSE, /* partial_inplace */
1019 0x00000fff, /* src_mask */
1020 0x00000fff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1024
1025 /* GNU extension to record C++ vtable member usage */
1026 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1027 0, /* rightshift */
1028 2, /* size (0 = byte, 1 = short, 2 = long) */
1029 0, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1034 "R_ARM_GNU_VTENTRY", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* GNU extension to record C++ vtable hierarchy */
1041 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1042 0, /* rightshift */
1043 2, /* size (0 = byte, 1 = short, 2 = long) */
1044 0, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 NULL, /* special_function */
1049 "R_ARM_GNU_VTINHERIT", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 HOWTO (R_ARM_THM_JUMP11, /* type */
1056 1, /* rightshift */
1057 1, /* size (0 = byte, 1 = short, 2 = long) */
1058 11, /* bitsize */
1059 TRUE, /* pc_relative */
1060 0, /* bitpos */
1061 complain_overflow_signed, /* complain_on_overflow */
1062 bfd_elf_generic_reloc, /* special_function */
1063 "R_ARM_THM_JUMP11", /* name */
1064 FALSE, /* partial_inplace */
1065 0x000007ff, /* src_mask */
1066 0x000007ff, /* dst_mask */
1067 TRUE), /* pcrel_offset */
1068
1069 HOWTO (R_ARM_THM_JUMP8, /* type */
1070 1, /* rightshift */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1072 8, /* bitsize */
1073 TRUE, /* pc_relative */
1074 0, /* bitpos */
1075 complain_overflow_signed, /* complain_on_overflow */
1076 bfd_elf_generic_reloc, /* special_function */
1077 "R_ARM_THM_JUMP8", /* name */
1078 FALSE, /* partial_inplace */
1079 0x000000ff, /* src_mask */
1080 0x000000ff, /* dst_mask */
1081 TRUE), /* pcrel_offset */
1082
1083 /* TLS relocations */
1084 HOWTO (R_ARM_TLS_GD32, /* type */
1085 0, /* rightshift */
1086 2, /* size (0 = byte, 1 = short, 2 = long) */
1087 32, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_bitfield,/* complain_on_overflow */
1091 NULL, /* special_function */
1092 "R_ARM_TLS_GD32", /* name */
1093 TRUE, /* partial_inplace */
1094 0xffffffff, /* src_mask */
1095 0xffffffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 HOWTO (R_ARM_TLS_LDM32, /* type */
1099 0, /* rightshift */
1100 2, /* size (0 = byte, 1 = short, 2 = long) */
1101 32, /* bitsize */
1102 FALSE, /* pc_relative */
1103 0, /* bitpos */
1104 complain_overflow_bitfield,/* complain_on_overflow */
1105 bfd_elf_generic_reloc, /* special_function */
1106 "R_ARM_TLS_LDM32", /* name */
1107 TRUE, /* partial_inplace */
1108 0xffffffff, /* src_mask */
1109 0xffffffff, /* dst_mask */
1110 FALSE), /* pcrel_offset */
1111
1112 HOWTO (R_ARM_TLS_LDO32, /* type */
1113 0, /* rightshift */
1114 2, /* size (0 = byte, 1 = short, 2 = long) */
1115 32, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_bitfield,/* complain_on_overflow */
1119 bfd_elf_generic_reloc, /* special_function */
1120 "R_ARM_TLS_LDO32", /* name */
1121 TRUE, /* partial_inplace */
1122 0xffffffff, /* src_mask */
1123 0xffffffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 HOWTO (R_ARM_TLS_IE32, /* type */
1127 0, /* rightshift */
1128 2, /* size (0 = byte, 1 = short, 2 = long) */
1129 32, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_bitfield,/* complain_on_overflow */
1133 NULL, /* special_function */
1134 "R_ARM_TLS_IE32", /* name */
1135 TRUE, /* partial_inplace */
1136 0xffffffff, /* src_mask */
1137 0xffffffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 HOWTO (R_ARM_TLS_LE32, /* type */
1141 0, /* rightshift */
1142 2, /* size (0 = byte, 1 = short, 2 = long) */
1143 32, /* bitsize */
1144 FALSE, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_bitfield,/* complain_on_overflow */
1147 bfd_elf_generic_reloc, /* special_function */
1148 "R_ARM_TLS_LE32", /* name */
1149 TRUE, /* partial_inplace */
1150 0xffffffff, /* src_mask */
1151 0xffffffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1153
1154 HOWTO (R_ARM_TLS_LDO12, /* type */
1155 0, /* rightshift */
1156 2, /* size (0 = byte, 1 = short, 2 = long) */
1157 12, /* bitsize */
1158 FALSE, /* pc_relative */
1159 0, /* bitpos */
1160 complain_overflow_bitfield,/* complain_on_overflow */
1161 bfd_elf_generic_reloc, /* special_function */
1162 "R_ARM_TLS_LDO12", /* name */
1163 FALSE, /* partial_inplace */
1164 0x00000fff, /* src_mask */
1165 0x00000fff, /* dst_mask */
1166 FALSE), /* pcrel_offset */
1167
1168 HOWTO (R_ARM_TLS_LE12, /* type */
1169 0, /* rightshift */
1170 2, /* size (0 = byte, 1 = short, 2 = long) */
1171 12, /* bitsize */
1172 FALSE, /* pc_relative */
1173 0, /* bitpos */
1174 complain_overflow_bitfield,/* complain_on_overflow */
1175 bfd_elf_generic_reloc, /* special_function */
1176 "R_ARM_TLS_LE12", /* name */
1177 FALSE, /* partial_inplace */
1178 0x00000fff, /* src_mask */
1179 0x00000fff, /* dst_mask */
1180 FALSE), /* pcrel_offset */
1181
1182 HOWTO (R_ARM_TLS_IE12GP, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 12, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield,/* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_ARM_TLS_IE12GP", /* name */
1191 FALSE, /* partial_inplace */
1192 0x00000fff, /* src_mask */
1193 0x00000fff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195 };
1196
1197 /* 112-127 private relocations
1198 128 R_ARM_ME_TOO, obsolete
1199 129-255 unallocated in AAELF.
1200
1201 249-255 extended, currently unused, relocations: */
1202
1203 static reloc_howto_type elf32_arm_howto_table_3[4] =
1204 {
1205 HOWTO (R_ARM_RREL32, /* type */
1206 0, /* rightshift */
1207 0, /* size (0 = byte, 1 = short, 2 = long) */
1208 0, /* bitsize */
1209 FALSE, /* pc_relative */
1210 0, /* bitpos */
1211 complain_overflow_dont,/* complain_on_overflow */
1212 bfd_elf_generic_reloc, /* special_function */
1213 "R_ARM_RREL32", /* name */
1214 FALSE, /* partial_inplace */
1215 0, /* src_mask */
1216 0, /* dst_mask */
1217 FALSE), /* pcrel_offset */
1218
1219 HOWTO (R_ARM_RABS32, /* type */
1220 0, /* rightshift */
1221 0, /* size (0 = byte, 1 = short, 2 = long) */
1222 0, /* bitsize */
1223 FALSE, /* pc_relative */
1224 0, /* bitpos */
1225 complain_overflow_dont,/* complain_on_overflow */
1226 bfd_elf_generic_reloc, /* special_function */
1227 "R_ARM_RABS32", /* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 HOWTO (R_ARM_RPC24, /* type */
1234 0, /* rightshift */
1235 0, /* size (0 = byte, 1 = short, 2 = long) */
1236 0, /* bitsize */
1237 FALSE, /* pc_relative */
1238 0, /* bitpos */
1239 complain_overflow_dont,/* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 "R_ARM_RPC24", /* name */
1242 FALSE, /* partial_inplace */
1243 0, /* src_mask */
1244 0, /* dst_mask */
1245 FALSE), /* pcrel_offset */
1246
1247 HOWTO (R_ARM_RBASE, /* type */
1248 0, /* rightshift */
1249 0, /* size (0 = byte, 1 = short, 2 = long) */
1250 0, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont,/* complain_on_overflow */
1254 bfd_elf_generic_reloc, /* special_function */
1255 "R_ARM_RBASE", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0, /* dst_mask */
1259 FALSE) /* pcrel_offset */
1260 };
1261
1262 static reloc_howto_type *
1263 elf32_arm_howto_from_type (unsigned int r_type)
1264 {
1265 if (r_type < NUM_ELEM (elf32_arm_howto_table_1))
1266 return &elf32_arm_howto_table_1[r_type];
1267
1268 if (r_type >= R_ARM_MOVW_BREL_NC
1269 && r_type < R_ARM_MOVW_BREL_NC + NUM_ELEM (elf32_arm_howto_table_2))
1270 return &elf32_arm_howto_table_2[r_type - R_ARM_MOVW_BREL_NC];
1271
1272 if (r_type >= R_ARM_RREL32
1273 && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2))
1274 return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32];
1275
1276 return NULL;
1277 }
1278
1279 static void
1280 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1281 Elf_Internal_Rela * elf_reloc)
1282 {
1283 unsigned int r_type;
1284
1285 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1286 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1287 }
1288
1289 struct elf32_arm_reloc_map
1290 {
1291 bfd_reloc_code_real_type bfd_reloc_val;
1292 unsigned char elf_reloc_val;
1293 };
1294
1295 /* All entries in this list must also be present in elf32_arm_howto_table. */
1296 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1297 {
1298 {BFD_RELOC_NONE, R_ARM_NONE},
1299 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1300 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1301 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1302 {BFD_RELOC_32, R_ARM_ABS32},
1303 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1304 {BFD_RELOC_8, R_ARM_ABS8},
1305 {BFD_RELOC_16, R_ARM_ABS16},
1306 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1307 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1308 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1309 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1310 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1311 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1312 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1313 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1314 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1315 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1316 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1317 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1318 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1319 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1320 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1321 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1322 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1323 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1324 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1325 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1326 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1327 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1328 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1329 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1330 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1331 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1332 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1333 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1334 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1335 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1336 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1337 };
1338
1339 static reloc_howto_type *
1340 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1341 bfd_reloc_code_real_type code)
1342 {
1343 unsigned int i;
1344 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1345 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1346 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1347
1348 return NULL;
1349 }
1350
1351 /* Support for core dump NOTE sections */
1352 static bfd_boolean
1353 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1354 {
1355 int offset;
1356 size_t size;
1357
1358 switch (note->descsz)
1359 {
1360 default:
1361 return FALSE;
1362
1363 case 148: /* Linux/ARM 32-bit*/
1364 /* pr_cursig */
1365 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1366
1367 /* pr_pid */
1368 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1369
1370 /* pr_reg */
1371 offset = 72;
1372 size = 72;
1373
1374 break;
1375 }
1376
1377 /* Make a ".reg/999" section. */
1378 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1379 size, note->descpos + offset);
1380 }
1381
1382 static bfd_boolean
1383 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1384 {
1385 switch (note->descsz)
1386 {
1387 default:
1388 return FALSE;
1389
1390 case 124: /* Linux/ARM elf_prpsinfo */
1391 elf_tdata (abfd)->core_program
1392 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1393 elf_tdata (abfd)->core_command
1394 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1395 }
1396
1397 /* Note that for some reason, a spurious space is tacked
1398 onto the end of the args in some (at least one anyway)
1399 implementations, so strip it off if it exists. */
1400
1401 {
1402 char *command = elf_tdata (abfd)->core_command;
1403 int n = strlen (command);
1404
1405 if (0 < n && command[n - 1] == ' ')
1406 command[n - 1] = '\0';
1407 }
1408
1409 return TRUE;
1410 }
1411
1412 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1413 #define TARGET_LITTLE_NAME "elf32-littlearm"
1414 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1415 #define TARGET_BIG_NAME "elf32-bigarm"
1416
1417 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1418 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1419
1420 typedef unsigned long int insn32;
1421 typedef unsigned short int insn16;
1422
1423 /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */
1424 #define INTERWORK_FLAG(abfd) \
1425 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \
1426 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1427
1428 /* The linker script knows the section names for placement.
1429 The entry_names are used to do simple name mangling on the stubs.
1430 Given a function name, and its type, the stub can be found. The
1431 name can be changed. The only requirement is the %s be present. */
1432 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1433 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1434
1435 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1436 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1437
1438 /* The name of the dynamic interpreter. This is put in the .interp
1439 section. */
1440 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1441
1442 #ifdef FOUR_WORD_PLT
1443
1444 /* The first entry in a procedure linkage table looks like
1445 this. It is set up so that any shared library function that is
1446 called before the relocation has been set up calls the dynamic
1447 linker first. */
1448 static const bfd_vma elf32_arm_plt0_entry [] =
1449 {
1450 0xe52de004, /* str lr, [sp, #-4]! */
1451 0xe59fe010, /* ldr lr, [pc, #16] */
1452 0xe08fe00e, /* add lr, pc, lr */
1453 0xe5bef008, /* ldr pc, [lr, #8]! */
1454 };
1455
1456 /* Subsequent entries in a procedure linkage table look like
1457 this. */
1458 static const bfd_vma elf32_arm_plt_entry [] =
1459 {
1460 0xe28fc600, /* add ip, pc, #NN */
1461 0xe28cca00, /* add ip, ip, #NN */
1462 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1463 0x00000000, /* unused */
1464 };
1465
1466 #else
1467
1468 /* The first entry in a procedure linkage table looks like
1469 this. It is set up so that any shared library function that is
1470 called before the relocation has been set up calls the dynamic
1471 linker first. */
1472 static const bfd_vma elf32_arm_plt0_entry [] =
1473 {
1474 0xe52de004, /* str lr, [sp, #-4]! */
1475 0xe59fe004, /* ldr lr, [pc, #4] */
1476 0xe08fe00e, /* add lr, pc, lr */
1477 0xe5bef008, /* ldr pc, [lr, #8]! */
1478 0x00000000, /* &GOT[0] - . */
1479 };
1480
1481 /* Subsequent entries in a procedure linkage table look like
1482 this. */
1483 static const bfd_vma elf32_arm_plt_entry [] =
1484 {
1485 0xe28fc600, /* add ip, pc, #0xNN00000 */
1486 0xe28cca00, /* add ip, ip, #0xNN000 */
1487 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1488 };
1489
1490 #endif
1491
1492 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1493 #define PLT_THUMB_STUB_SIZE 4
1494 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1495 {
1496 0x4778, /* bx pc */
1497 0x46c0 /* nop */
1498 };
1499
1500 /* The entries in a PLT when using a DLL-based target with multiple
1501 address spaces. */
1502 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1503 {
1504 0xe51ff004, /* ldr pc, [pc, #-4] */
1505 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1506 };
1507
1508 /* Used to build a map of a section. This is required for mixed-endian
1509 code/data. */
1510
1511 typedef struct elf32_elf_section_map
1512 {
1513 bfd_vma vma;
1514 char type;
1515 }
1516 elf32_arm_section_map;
1517
1518 struct _arm_elf_section_data
1519 {
1520 struct bfd_elf_section_data elf;
1521 int mapcount;
1522 elf32_arm_section_map *map;
1523 };
1524
1525 #define elf32_arm_section_data(sec) \
1526 ((struct _arm_elf_section_data *) elf_section_data (sec))
1527
1528 /* The size of the thread control block. */
1529 #define TCB_SIZE 8
1530
1531 struct elf32_arm_obj_tdata
1532 {
1533 struct elf_obj_tdata root;
1534
1535 /* tls_type for each local got entry. */
1536 char *local_got_tls_type;
1537 };
1538
1539 #define elf32_arm_tdata(abfd) \
1540 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
1541
1542 #define elf32_arm_local_got_tls_type(abfd) \
1543 (elf32_arm_tdata (abfd)->local_got_tls_type)
1544
1545 static bfd_boolean
1546 elf32_arm_mkobject (bfd *abfd)
1547 {
1548 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
1549 abfd->tdata.any = bfd_zalloc (abfd, amt);
1550 if (abfd->tdata.any == NULL)
1551 return FALSE;
1552 return TRUE;
1553 }
1554
1555 /* The ARM linker needs to keep track of the number of relocs that it
1556 decides to copy in check_relocs for each symbol. This is so that
1557 it can discard PC relative relocs if it doesn't need them when
1558 linking with -Bsymbolic. We store the information in a field
1559 extending the regular ELF linker hash table. */
1560
1561 /* This structure keeps track of the number of relocs we have copied
1562 for a given symbol. */
1563 struct elf32_arm_relocs_copied
1564 {
1565 /* Next section. */
1566 struct elf32_arm_relocs_copied * next;
1567 /* A section in dynobj. */
1568 asection * section;
1569 /* Number of relocs copied in this section. */
1570 bfd_size_type count;
1571 /* Number of PC-relative relocs copied in this section. */
1572 bfd_size_type pc_count;
1573 };
1574
1575 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
1576
1577 /* Arm ELF linker hash entry. */
1578 struct elf32_arm_link_hash_entry
1579 {
1580 struct elf_link_hash_entry root;
1581
1582 /* Number of PC relative relocs copied for this symbol. */
1583 struct elf32_arm_relocs_copied * relocs_copied;
1584
1585 /* We reference count Thumb references to a PLT entry separately,
1586 so that we can emit the Thumb trampoline only if needed. */
1587 bfd_signed_vma plt_thumb_refcount;
1588
1589 /* Since PLT entries have variable size if the Thumb prologue is
1590 used, we need to record the index into .got.plt instead of
1591 recomputing it from the PLT offset. */
1592 bfd_signed_vma plt_got_offset;
1593
1594 #define GOT_UNKNOWN 0
1595 #define GOT_NORMAL 1
1596 #define GOT_TLS_GD 2
1597 #define GOT_TLS_IE 4
1598 unsigned char tls_type;
1599 };
1600
1601 /* Traverse an arm ELF linker hash table. */
1602 #define elf32_arm_link_hash_traverse(table, func, info) \
1603 (elf_link_hash_traverse \
1604 (&(table)->root, \
1605 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1606 (info)))
1607
1608 /* Get the ARM elf linker hash table from a link_info structure. */
1609 #define elf32_arm_hash_table(info) \
1610 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1611
1612 /* ARM ELF linker hash table. */
1613 struct elf32_arm_link_hash_table
1614 {
1615 /* The main hash table. */
1616 struct elf_link_hash_table root;
1617
1618 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1619 bfd_size_type thumb_glue_size;
1620
1621 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1622 bfd_size_type arm_glue_size;
1623
1624 /* An arbitrary input BFD chosen to hold the glue sections. */
1625 bfd * bfd_of_glue_owner;
1626
1627 /* Nonzero to output a BE8 image. */
1628 int byteswap_code;
1629
1630 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1631 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1632 int target1_is_rel;
1633
1634 /* The relocation to use for R_ARM_TARGET2 relocations. */
1635 int target2_reloc;
1636
1637 /* Nonzero to fix BX instructions for ARMv4 targets. */
1638 int fix_v4bx;
1639
1640 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
1641 int use_blx;
1642
1643 /* The number of bytes in the initial entry in the PLT. */
1644 bfd_size_type plt_header_size;
1645
1646 /* The number of bytes in the subsequent PLT etries. */
1647 bfd_size_type plt_entry_size;
1648
1649 /* True if the target system is Symbian OS. */
1650 int symbian_p;
1651
1652 /* True if the target uses REL relocations. */
1653 int use_rel;
1654
1655 /* Short-cuts to get to dynamic linker sections. */
1656 asection *sgot;
1657 asection *sgotplt;
1658 asection *srelgot;
1659 asection *splt;
1660 asection *srelplt;
1661 asection *sdynbss;
1662 asection *srelbss;
1663
1664 /* Data for R_ARM_TLS_LDM32 relocations. */
1665 union {
1666 bfd_signed_vma refcount;
1667 bfd_vma offset;
1668 } tls_ldm_got;
1669
1670 /* Small local sym to section mapping cache. */
1671 struct sym_sec_cache sym_sec;
1672
1673 /* For convenience in allocate_dynrelocs. */
1674 bfd * obfd;
1675 };
1676
1677 /* Create an entry in an ARM ELF linker hash table. */
1678
1679 static struct bfd_hash_entry *
1680 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1681 struct bfd_hash_table * table,
1682 const char * string)
1683 {
1684 struct elf32_arm_link_hash_entry * ret =
1685 (struct elf32_arm_link_hash_entry *) entry;
1686
1687 /* Allocate the structure if it has not already been allocated by a
1688 subclass. */
1689 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1690 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1691 if (ret == NULL)
1692 return (struct bfd_hash_entry *) ret;
1693
1694 /* Call the allocation method of the superclass. */
1695 ret = ((struct elf32_arm_link_hash_entry *)
1696 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1697 table, string));
1698 if (ret != NULL)
1699 {
1700 ret->relocs_copied = NULL;
1701 ret->tls_type = GOT_UNKNOWN;
1702 ret->plt_thumb_refcount = 0;
1703 ret->plt_got_offset = -1;
1704 }
1705
1706 return (struct bfd_hash_entry *) ret;
1707 }
1708
1709 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
1710 shortcuts to them in our hash table. */
1711
1712 static bfd_boolean
1713 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1714 {
1715 struct elf32_arm_link_hash_table *htab;
1716
1717 htab = elf32_arm_hash_table (info);
1718 /* BPABI objects never have a GOT, or associated sections. */
1719 if (htab->symbian_p)
1720 return TRUE;
1721
1722 if (! _bfd_elf_create_got_section (dynobj, info))
1723 return FALSE;
1724
1725 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1726 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1727 if (!htab->sgot || !htab->sgotplt)
1728 abort ();
1729
1730 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
1731 (SEC_ALLOC | SEC_LOAD
1732 | SEC_HAS_CONTENTS
1733 | SEC_IN_MEMORY
1734 | SEC_LINKER_CREATED
1735 | SEC_READONLY));
1736 if (htab->srelgot == NULL
1737 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1738 return FALSE;
1739 return TRUE;
1740 }
1741
1742 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1743 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1744 hash table. */
1745
1746 static bfd_boolean
1747 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1748 {
1749 struct elf32_arm_link_hash_table *htab;
1750
1751 htab = elf32_arm_hash_table (info);
1752 if (!htab->sgot && !create_got_section (dynobj, info))
1753 return FALSE;
1754
1755 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1756 return FALSE;
1757
1758 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1759 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
1760 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1761 if (!info->shared)
1762 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
1763
1764 if (!htab->splt
1765 || !htab->srelplt
1766 || !htab->sdynbss
1767 || (!info->shared && !htab->srelbss))
1768 abort ();
1769
1770 return TRUE;
1771 }
1772
1773 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1774
1775 static void
1776 elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
1777 struct elf_link_hash_entry *dir,
1778 struct elf_link_hash_entry *ind)
1779 {
1780 struct elf32_arm_link_hash_entry *edir, *eind;
1781
1782 edir = (struct elf32_arm_link_hash_entry *) dir;
1783 eind = (struct elf32_arm_link_hash_entry *) ind;
1784
1785 if (eind->relocs_copied != NULL)
1786 {
1787 if (edir->relocs_copied != NULL)
1788 {
1789 struct elf32_arm_relocs_copied **pp;
1790 struct elf32_arm_relocs_copied *p;
1791
1792 if (ind->root.type == bfd_link_hash_indirect)
1793 abort ();
1794
1795 /* Add reloc counts against the weak sym to the strong sym
1796 list. Merge any entries against the same section. */
1797 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1798 {
1799 struct elf32_arm_relocs_copied *q;
1800
1801 for (q = edir->relocs_copied; q != NULL; q = q->next)
1802 if (q->section == p->section)
1803 {
1804 q->pc_count += p->pc_count;
1805 q->count += p->count;
1806 *pp = p->next;
1807 break;
1808 }
1809 if (q == NULL)
1810 pp = &p->next;
1811 }
1812 *pp = edir->relocs_copied;
1813 }
1814
1815 edir->relocs_copied = eind->relocs_copied;
1816 eind->relocs_copied = NULL;
1817 }
1818
1819 /* If the direct symbol already has an associated PLT entry, the
1820 indirect symbol should not. If it doesn't, swap refcount information
1821 from the indirect symbol. */
1822 if (edir->plt_thumb_refcount == 0)
1823 {
1824 edir->plt_thumb_refcount = eind->plt_thumb_refcount;
1825 eind->plt_thumb_refcount = 0;
1826 }
1827 else
1828 BFD_ASSERT (eind->plt_thumb_refcount == 0);
1829
1830 if (ind->root.type == bfd_link_hash_indirect
1831 && dir->got.refcount <= 0)
1832 {
1833 edir->tls_type = eind->tls_type;
1834 eind->tls_type = GOT_UNKNOWN;
1835 }
1836
1837 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1838 }
1839
1840 /* Create an ARM elf linker hash table. */
1841
1842 static struct bfd_link_hash_table *
1843 elf32_arm_link_hash_table_create (bfd *abfd)
1844 {
1845 struct elf32_arm_link_hash_table *ret;
1846 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1847
1848 ret = bfd_malloc (amt);
1849 if (ret == NULL)
1850 return NULL;
1851
1852 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1853 elf32_arm_link_hash_newfunc))
1854 {
1855 free (ret);
1856 return NULL;
1857 }
1858
1859 ret->sgot = NULL;
1860 ret->sgotplt = NULL;
1861 ret->srelgot = NULL;
1862 ret->splt = NULL;
1863 ret->srelplt = NULL;
1864 ret->sdynbss = NULL;
1865 ret->srelbss = NULL;
1866 ret->thumb_glue_size = 0;
1867 ret->arm_glue_size = 0;
1868 ret->bfd_of_glue_owner = NULL;
1869 ret->byteswap_code = 0;
1870 ret->target1_is_rel = 0;
1871 ret->target2_reloc = R_ARM_NONE;
1872 #ifdef FOUR_WORD_PLT
1873 ret->plt_header_size = 16;
1874 ret->plt_entry_size = 16;
1875 #else
1876 ret->plt_header_size = 20;
1877 ret->plt_entry_size = 12;
1878 #endif
1879 ret->fix_v4bx = 0;
1880 ret->use_blx = 0;
1881 ret->symbian_p = 0;
1882 ret->use_rel = 1;
1883 ret->sym_sec.abfd = NULL;
1884 ret->obfd = abfd;
1885 ret->tls_ldm_got.refcount = 0;
1886
1887 return &ret->root.root;
1888 }
1889
1890 /* Locate the Thumb encoded calling stub for NAME. */
1891
1892 static struct elf_link_hash_entry *
1893 find_thumb_glue (struct bfd_link_info *link_info,
1894 const char *name,
1895 bfd *input_bfd)
1896 {
1897 char *tmp_name;
1898 struct elf_link_hash_entry *hash;
1899 struct elf32_arm_link_hash_table *hash_table;
1900
1901 /* We need a pointer to the armelf specific hash table. */
1902 hash_table = elf32_arm_hash_table (link_info);
1903
1904 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1905 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
1906
1907 BFD_ASSERT (tmp_name);
1908
1909 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1910
1911 hash = elf_link_hash_lookup
1912 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1913
1914 if (hash == NULL)
1915 /* xgettext:c-format */
1916 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
1917 input_bfd, tmp_name, name);
1918
1919 free (tmp_name);
1920
1921 return hash;
1922 }
1923
1924 /* Locate the ARM encoded calling stub for NAME. */
1925
1926 static struct elf_link_hash_entry *
1927 find_arm_glue (struct bfd_link_info *link_info,
1928 const char *name,
1929 bfd *input_bfd)
1930 {
1931 char *tmp_name;
1932 struct elf_link_hash_entry *myh;
1933 struct elf32_arm_link_hash_table *hash_table;
1934
1935 /* We need a pointer to the elfarm specific hash table. */
1936 hash_table = elf32_arm_hash_table (link_info);
1937
1938 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
1939 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
1940
1941 BFD_ASSERT (tmp_name);
1942
1943 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
1944
1945 myh = elf_link_hash_lookup
1946 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
1947
1948 if (myh == NULL)
1949 /* xgettext:c-format */
1950 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
1951 input_bfd, tmp_name, name);
1952
1953 free (tmp_name);
1954
1955 return myh;
1956 }
1957
1958 /* ARM->Thumb glue (static images):
1959
1960 .arm
1961 __func_from_arm:
1962 ldr r12, __func_addr
1963 bx r12
1964 __func_addr:
1965 .word func @ behave as if you saw a ARM_32 reloc.
1966
1967 (relocatable images)
1968 .arm
1969 __func_from_arm:
1970 ldr r12, __func_offset
1971 add r12, r12, pc
1972 bx r12
1973 __func_offset:
1974 .word func - .
1975 */
1976
1977 #define ARM2THUMB_STATIC_GLUE_SIZE 12
1978 static const insn32 a2t1_ldr_insn = 0xe59fc000;
1979 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1980 static const insn32 a2t3_func_addr_insn = 0x00000001;
1981
1982 #define ARM2THUMB_PIC_GLUE_SIZE 16
1983 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
1984 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
1985 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
1986
1987 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
1988
1989 .thumb .thumb
1990 .align 2 .align 2
1991 __func_from_thumb: __func_from_thumb:
1992 bx pc push {r6, lr}
1993 nop ldr r6, __func_addr
1994 .arm mov lr, pc
1995 __func_change_to_arm: bx r6
1996 b func .arm
1997 __func_back_to_thumb:
1998 ldmia r13! {r6, lr}
1999 bx lr
2000 __func_addr:
2001 .word func */
2002
2003 #define THUMB2ARM_GLUE_SIZE 8
2004 static const insn16 t2a1_bx_pc_insn = 0x4778;
2005 static const insn16 t2a2_noop_insn = 0x46c0;
2006 static const insn32 t2a3_b_insn = 0xea000000;
2007
2008 #ifndef ELFARM_NABI_C_INCLUDED
2009 bfd_boolean
2010 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
2011 {
2012 asection * s;
2013 bfd_byte * foo;
2014 struct elf32_arm_link_hash_table * globals;
2015
2016 globals = elf32_arm_hash_table (info);
2017
2018 BFD_ASSERT (globals != NULL);
2019
2020 if (globals->arm_glue_size != 0)
2021 {
2022 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2023
2024 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2025 ARM2THUMB_GLUE_SECTION_NAME);
2026
2027 BFD_ASSERT (s != NULL);
2028
2029 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
2030
2031 s->size = globals->arm_glue_size;
2032 s->contents = foo;
2033 }
2034
2035 if (globals->thumb_glue_size != 0)
2036 {
2037 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2038
2039 s = bfd_get_section_by_name
2040 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2041
2042 BFD_ASSERT (s != NULL);
2043
2044 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
2045
2046 s->size = globals->thumb_glue_size;
2047 s->contents = foo;
2048 }
2049
2050 return TRUE;
2051 }
2052
2053 static void
2054 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
2055 struct elf_link_hash_entry * h)
2056 {
2057 const char * name = h->root.root.string;
2058 asection * s;
2059 char * tmp_name;
2060 struct elf_link_hash_entry * myh;
2061 struct bfd_link_hash_entry * bh;
2062 struct elf32_arm_link_hash_table * globals;
2063 bfd_vma val;
2064
2065 globals = elf32_arm_hash_table (link_info);
2066
2067 BFD_ASSERT (globals != NULL);
2068 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2069
2070 s = bfd_get_section_by_name
2071 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
2072
2073 BFD_ASSERT (s != NULL);
2074
2075 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2076
2077 BFD_ASSERT (tmp_name);
2078
2079 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2080
2081 myh = elf_link_hash_lookup
2082 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
2083
2084 if (myh != NULL)
2085 {
2086 /* We've already seen this guy. */
2087 free (tmp_name);
2088 return;
2089 }
2090
2091 /* The only trick here is using hash_table->arm_glue_size as the value.
2092 Even though the section isn't allocated yet, this is where we will be
2093 putting it. */
2094 bh = NULL;
2095 val = globals->arm_glue_size + 1;
2096 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2097 tmp_name, BSF_GLOBAL, s, val,
2098 NULL, TRUE, FALSE, &bh);
2099
2100 myh = (struct elf_link_hash_entry *) bh;
2101 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2102 myh->forced_local = 1;
2103
2104 free (tmp_name);
2105
2106 if ((link_info->shared || globals->root.is_relocatable_executable))
2107 globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE;
2108 else
2109 globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE;
2110
2111 return;
2112 }
2113
2114 static void
2115 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2116 struct elf_link_hash_entry *h)
2117 {
2118 const char *name = h->root.root.string;
2119 asection *s;
2120 char *tmp_name;
2121 struct elf_link_hash_entry *myh;
2122 struct bfd_link_hash_entry *bh;
2123 struct elf32_arm_link_hash_table *hash_table;
2124 bfd_vma val;
2125
2126 hash_table = elf32_arm_hash_table (link_info);
2127
2128 BFD_ASSERT (hash_table != NULL);
2129 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2130
2131 s = bfd_get_section_by_name
2132 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2133
2134 BFD_ASSERT (s != NULL);
2135
2136 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2137 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2138
2139 BFD_ASSERT (tmp_name);
2140
2141 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2142
2143 myh = elf_link_hash_lookup
2144 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2145
2146 if (myh != NULL)
2147 {
2148 /* We've already seen this guy. */
2149 free (tmp_name);
2150 return;
2151 }
2152
2153 bh = NULL;
2154 val = hash_table->thumb_glue_size + 1;
2155 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2156 tmp_name, BSF_GLOBAL, s, val,
2157 NULL, TRUE, FALSE, &bh);
2158
2159 /* If we mark it 'Thumb', the disassembler will do a better job. */
2160 myh = (struct elf_link_hash_entry *) bh;
2161 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2162 myh->forced_local = 1;
2163
2164 free (tmp_name);
2165
2166 #define CHANGE_TO_ARM "__%s_change_to_arm"
2167 #define BACK_FROM_ARM "__%s_back_from_arm"
2168
2169 /* Allocate another symbol to mark where we switch to Arm mode. */
2170 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2171 + strlen (CHANGE_TO_ARM) + 1);
2172
2173 BFD_ASSERT (tmp_name);
2174
2175 sprintf (tmp_name, CHANGE_TO_ARM, name);
2176
2177 bh = NULL;
2178 val = hash_table->thumb_glue_size + 4,
2179 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2180 tmp_name, BSF_LOCAL, s, val,
2181 NULL, TRUE, FALSE, &bh);
2182
2183 free (tmp_name);
2184
2185 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2186
2187 return;
2188 }
2189
2190 /* Add the glue sections to ABFD. This function is called from the
2191 linker scripts in ld/emultempl/{armelf}.em. */
2192
2193 bfd_boolean
2194 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
2195 struct bfd_link_info *info)
2196 {
2197 flagword flags;
2198 asection *sec;
2199
2200 /* If we are only performing a partial
2201 link do not bother adding the glue. */
2202 if (info->relocatable)
2203 return TRUE;
2204
2205 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
2206
2207 if (sec == NULL)
2208 {
2209 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
2210 will prevent elf_link_input_bfd() from processing the contents
2211 of this section. */
2212 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
2213
2214 sec = bfd_make_section_with_flags (abfd,
2215 ARM2THUMB_GLUE_SECTION_NAME,
2216 flags);
2217
2218 if (sec == NULL
2219 || !bfd_set_section_alignment (abfd, sec, 2))
2220 return FALSE;
2221
2222 /* Set the gc mark to prevent the section from being removed by garbage
2223 collection, despite the fact that no relocs refer to this section. */
2224 sec->gc_mark = 1;
2225 }
2226
2227 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
2228
2229 if (sec == NULL)
2230 {
2231 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2232 | SEC_CODE | SEC_READONLY;
2233
2234 sec = bfd_make_section_with_flags (abfd,
2235 THUMB2ARM_GLUE_SECTION_NAME,
2236 flags);
2237
2238 if (sec == NULL
2239 || !bfd_set_section_alignment (abfd, sec, 2))
2240 return FALSE;
2241
2242 sec->gc_mark = 1;
2243 }
2244
2245 return TRUE;
2246 }
2247
2248 /* Select a BFD to be used to hold the sections used by the glue code.
2249 This function is called from the linker scripts in ld/emultempl/
2250 {armelf/pe}.em */
2251
2252 bfd_boolean
2253 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
2254 {
2255 struct elf32_arm_link_hash_table *globals;
2256
2257 /* If we are only performing a partial link
2258 do not bother getting a bfd to hold the glue. */
2259 if (info->relocatable)
2260 return TRUE;
2261
2262 /* Make sure we don't attach the glue sections to a dynamic object. */
2263 BFD_ASSERT (!(abfd->flags & DYNAMIC));
2264
2265 globals = elf32_arm_hash_table (info);
2266
2267 BFD_ASSERT (globals != NULL);
2268
2269 if (globals->bfd_of_glue_owner != NULL)
2270 return TRUE;
2271
2272 /* Save the bfd for later use. */
2273 globals->bfd_of_glue_owner = abfd;
2274
2275 return TRUE;
2276 }
2277
2278 bfd_boolean
2279 bfd_elf32_arm_process_before_allocation (bfd *abfd,
2280 struct bfd_link_info *link_info,
2281 int byteswap_code)
2282 {
2283 Elf_Internal_Shdr *symtab_hdr;
2284 Elf_Internal_Rela *internal_relocs = NULL;
2285 Elf_Internal_Rela *irel, *irelend;
2286 bfd_byte *contents = NULL;
2287
2288 asection *sec;
2289 struct elf32_arm_link_hash_table *globals;
2290
2291 /* If we are only performing a partial link do not bother
2292 to construct any glue. */
2293 if (link_info->relocatable)
2294 return TRUE;
2295
2296 /* Here we have a bfd that is to be included on the link. We have a hook
2297 to do reloc rummaging, before section sizes are nailed down. */
2298 globals = elf32_arm_hash_table (link_info);
2299
2300 BFD_ASSERT (globals != NULL);
2301 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2302
2303 if (byteswap_code && !bfd_big_endian (abfd))
2304 {
2305 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
2306 abfd);
2307 return FALSE;
2308 }
2309 globals->byteswap_code = byteswap_code;
2310
2311 /* Rummage around all the relocs and map the glue vectors. */
2312 sec = abfd->sections;
2313
2314 if (sec == NULL)
2315 return TRUE;
2316
2317 for (; sec != NULL; sec = sec->next)
2318 {
2319 if (sec->reloc_count == 0)
2320 continue;
2321
2322 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2323
2324 /* Load the relocs. */
2325 internal_relocs
2326 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
2327 (Elf_Internal_Rela *) NULL, FALSE);
2328
2329 if (internal_relocs == NULL)
2330 goto error_return;
2331
2332 irelend = internal_relocs + sec->reloc_count;
2333 for (irel = internal_relocs; irel < irelend; irel++)
2334 {
2335 long r_type;
2336 unsigned long r_index;
2337
2338 struct elf_link_hash_entry *h;
2339
2340 r_type = ELF32_R_TYPE (irel->r_info);
2341 r_index = ELF32_R_SYM (irel->r_info);
2342
2343 /* These are the only relocation types we care about. */
2344 if ( r_type != R_ARM_PC24
2345 && r_type != R_ARM_PLT32
2346 && r_type != R_ARM_CALL
2347 && r_type != R_ARM_JUMP24
2348 && r_type != R_ARM_THM_CALL)
2349 continue;
2350
2351 /* Get the section contents if we haven't done so already. */
2352 if (contents == NULL)
2353 {
2354 /* Get cached copy if it exists. */
2355 if (elf_section_data (sec)->this_hdr.contents != NULL)
2356 contents = elf_section_data (sec)->this_hdr.contents;
2357 else
2358 {
2359 /* Go get them off disk. */
2360 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2361 goto error_return;
2362 }
2363 }
2364
2365 /* If the relocation is not against a symbol it cannot concern us. */
2366 h = NULL;
2367
2368 /* We don't care about local symbols. */
2369 if (r_index < symtab_hdr->sh_info)
2370 continue;
2371
2372 /* This is an external symbol. */
2373 r_index -= symtab_hdr->sh_info;
2374 h = (struct elf_link_hash_entry *)
2375 elf_sym_hashes (abfd)[r_index];
2376
2377 /* If the relocation is against a static symbol it must be within
2378 the current section and so cannot be a cross ARM/Thumb relocation. */
2379 if (h == NULL)
2380 continue;
2381
2382 /* If the call will go through a PLT entry then we do not need
2383 glue. */
2384 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
2385 continue;
2386
2387 switch (r_type)
2388 {
2389 case R_ARM_PC24:
2390 case R_ARM_PLT32:
2391 case R_ARM_CALL:
2392 case R_ARM_JUMP24:
2393 /* This one is a call from arm code. We need to look up
2394 the target of the call. If it is a thumb target, we
2395 insert glue. */
2396 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
2397 record_arm_to_thumb_glue (link_info, h);
2398 break;
2399
2400 case R_ARM_THM_CALL:
2401 /* This one is a call from thumb code. We look
2402 up the target of the call. If it is not a thumb
2403 target, we insert glue. */
2404 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
2405 record_thumb_to_arm_glue (link_info, h);
2406 break;
2407
2408 default:
2409 abort ();
2410 }
2411 }
2412
2413 if (contents != NULL
2414 && elf_section_data (sec)->this_hdr.contents != contents)
2415 free (contents);
2416 contents = NULL;
2417
2418 if (internal_relocs != NULL
2419 && elf_section_data (sec)->relocs != internal_relocs)
2420 free (internal_relocs);
2421 internal_relocs = NULL;
2422 }
2423
2424 return TRUE;
2425
2426 error_return:
2427 if (contents != NULL
2428 && elf_section_data (sec)->this_hdr.contents != contents)
2429 free (contents);
2430 if (internal_relocs != NULL
2431 && elf_section_data (sec)->relocs != internal_relocs)
2432 free (internal_relocs);
2433
2434 return FALSE;
2435 }
2436 #endif
2437
2438
2439 /* Set target relocation values needed during linking. */
2440
2441 void
2442 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
2443 int target1_is_rel,
2444 char * target2_type,
2445 int fix_v4bx,
2446 int use_blx)
2447 {
2448 struct elf32_arm_link_hash_table *globals;
2449
2450 globals = elf32_arm_hash_table (link_info);
2451
2452 globals->target1_is_rel = target1_is_rel;
2453 if (strcmp (target2_type, "rel") == 0)
2454 globals->target2_reloc = R_ARM_REL32;
2455 else if (strcmp (target2_type, "abs") == 0)
2456 globals->target2_reloc = R_ARM_ABS32;
2457 else if (strcmp (target2_type, "got-rel") == 0)
2458 globals->target2_reloc = R_ARM_GOT_PREL;
2459 else
2460 {
2461 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
2462 target2_type);
2463 }
2464 globals->fix_v4bx = fix_v4bx;
2465 globals->use_blx |= use_blx;
2466 }
2467
2468 /* The thumb form of a long branch is a bit finicky, because the offset
2469 encoding is split over two fields, each in it's own instruction. They
2470 can occur in any order. So given a thumb form of long branch, and an
2471 offset, insert the offset into the thumb branch and return finished
2472 instruction.
2473
2474 It takes two thumb instructions to encode the target address. Each has
2475 11 bits to invest. The upper 11 bits are stored in one (identified by
2476 H-0.. see below), the lower 11 bits are stored in the other (identified
2477 by H-1).
2478
2479 Combine together and shifted left by 1 (it's a half word address) and
2480 there you have it.
2481
2482 Op: 1111 = F,
2483 H-0, upper address-0 = 000
2484 Op: 1111 = F,
2485 H-1, lower address-0 = 800
2486
2487 They can be ordered either way, but the arm tools I've seen always put
2488 the lower one first. It probably doesn't matter. krk@cygnus.com
2489
2490 XXX: Actually the order does matter. The second instruction (H-1)
2491 moves the computed address into the PC, so it must be the second one
2492 in the sequence. The problem, however is that whilst little endian code
2493 stores the instructions in HI then LOW order, big endian code does the
2494 reverse. nickc@cygnus.com. */
2495
2496 #define LOW_HI_ORDER 0xF800F000
2497 #define HI_LOW_ORDER 0xF000F800
2498
2499 static insn32
2500 insert_thumb_branch (insn32 br_insn, int rel_off)
2501 {
2502 unsigned int low_bits;
2503 unsigned int high_bits;
2504
2505 BFD_ASSERT ((rel_off & 1) != 1);
2506
2507 rel_off >>= 1; /* Half word aligned address. */
2508 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2509 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
2510
2511 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2512 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2513 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2514 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2515 else
2516 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2517 abort (); /* Error - not a valid branch instruction form. */
2518
2519 return br_insn;
2520 }
2521
2522 /* Thumb code calling an ARM function. */
2523
2524 static int
2525 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2526 const char * name,
2527 bfd * input_bfd,
2528 bfd * output_bfd,
2529 asection * input_section,
2530 bfd_byte * hit_data,
2531 asection * sym_sec,
2532 bfd_vma offset,
2533 bfd_signed_vma addend,
2534 bfd_vma val)
2535 {
2536 asection * s = 0;
2537 bfd_vma my_offset;
2538 unsigned long int tmp;
2539 long int ret_offset;
2540 struct elf_link_hash_entry * myh;
2541 struct elf32_arm_link_hash_table * globals;
2542
2543 myh = find_thumb_glue (info, name, input_bfd);
2544 if (myh == NULL)
2545 return FALSE;
2546
2547 globals = elf32_arm_hash_table (info);
2548
2549 BFD_ASSERT (globals != NULL);
2550 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2551
2552 my_offset = myh->root.u.def.value;
2553
2554 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2555 THUMB2ARM_GLUE_SECTION_NAME);
2556
2557 BFD_ASSERT (s != NULL);
2558 BFD_ASSERT (s->contents != NULL);
2559 BFD_ASSERT (s->output_section != NULL);
2560
2561 if ((my_offset & 0x01) == 0x01)
2562 {
2563 if (sym_sec != NULL
2564 && sym_sec->owner != NULL
2565 && !INTERWORK_FLAG (sym_sec->owner))
2566 {
2567 (*_bfd_error_handler)
2568 (_("%B(%s): warning: interworking not enabled.\n"
2569 " first occurrence: %B: thumb call to arm"),
2570 sym_sec->owner, input_bfd, name);
2571
2572 return FALSE;
2573 }
2574
2575 --my_offset;
2576 myh->root.u.def.value = my_offset;
2577
2578 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2579 s->contents + my_offset);
2580
2581 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
2582 s->contents + my_offset + 2);
2583
2584 ret_offset =
2585 /* Address of destination of the stub. */
2586 ((bfd_signed_vma) val)
2587 - ((bfd_signed_vma)
2588 /* Offset from the start of the current section
2589 to the start of the stubs. */
2590 (s->output_offset
2591 /* Offset of the start of this stub from the start of the stubs. */
2592 + my_offset
2593 /* Address of the start of the current section. */
2594 + s->output_section->vma)
2595 /* The branch instruction is 4 bytes into the stub. */
2596 + 4
2597 /* ARM branches work from the pc of the instruction + 8. */
2598 + 8);
2599
2600 bfd_put_32 (output_bfd,
2601 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2602 s->contents + my_offset + 4);
2603 }
2604
2605 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2606
2607 /* Now go back and fix up the original BL insn to point to here. */
2608 ret_offset =
2609 /* Address of where the stub is located. */
2610 (s->output_section->vma + s->output_offset + my_offset)
2611 /* Address of where the BL is located. */
2612 - (input_section->output_section->vma + input_section->output_offset
2613 + offset)
2614 /* Addend in the relocation. */
2615 - addend
2616 /* Biassing for PC-relative addressing. */
2617 - 8;
2618
2619 tmp = bfd_get_32 (input_bfd, hit_data
2620 - input_section->vma);
2621
2622 bfd_put_32 (output_bfd,
2623 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2624 hit_data - input_section->vma);
2625
2626 return TRUE;
2627 }
2628
2629 /* Arm code calling a Thumb function. */
2630
2631 static int
2632 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2633 const char * name,
2634 bfd * input_bfd,
2635 bfd * output_bfd,
2636 asection * input_section,
2637 bfd_byte * hit_data,
2638 asection * sym_sec,
2639 bfd_vma offset,
2640 bfd_signed_vma addend,
2641 bfd_vma val)
2642 {
2643 unsigned long int tmp;
2644 bfd_vma my_offset;
2645 asection * s;
2646 long int ret_offset;
2647 struct elf_link_hash_entry * myh;
2648 struct elf32_arm_link_hash_table * globals;
2649
2650 myh = find_arm_glue (info, name, input_bfd);
2651 if (myh == NULL)
2652 return FALSE;
2653
2654 globals = elf32_arm_hash_table (info);
2655
2656 BFD_ASSERT (globals != NULL);
2657 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2658
2659 my_offset = myh->root.u.def.value;
2660 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2661 ARM2THUMB_GLUE_SECTION_NAME);
2662 BFD_ASSERT (s != NULL);
2663 BFD_ASSERT (s->contents != NULL);
2664 BFD_ASSERT (s->output_section != NULL);
2665
2666 if ((my_offset & 0x01) == 0x01)
2667 {
2668 if (sym_sec != NULL
2669 && sym_sec->owner != NULL
2670 && !INTERWORK_FLAG (sym_sec->owner))
2671 {
2672 (*_bfd_error_handler)
2673 (_("%B(%s): warning: interworking not enabled.\n"
2674 " first occurrence: %B: arm call to thumb"),
2675 sym_sec->owner, input_bfd, name);
2676 }
2677
2678 --my_offset;
2679 myh->root.u.def.value = my_offset;
2680
2681 if ((info->shared || globals->root.is_relocatable_executable))
2682 {
2683 /* For relocatable objects we can't use absolute addresses,
2684 so construct the address from a relative offset. */
2685 /* TODO: If the offset is small it's probably worth
2686 constructing the address with adds. */
2687 bfd_put_32 (output_bfd, (bfd_vma) a2t1p_ldr_insn,
2688 s->contents + my_offset);
2689 bfd_put_32 (output_bfd, (bfd_vma) a2t2p_add_pc_insn,
2690 s->contents + my_offset + 4);
2691 bfd_put_32 (output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
2692 s->contents + my_offset + 8);
2693 /* Adjust the offset by 4 for the position of the add,
2694 and 8 for the pipeline offset. */
2695 ret_offset = (val - (s->output_offset
2696 + s->output_section->vma
2697 + my_offset + 12))
2698 | 1;
2699 bfd_put_32 (output_bfd, ret_offset,
2700 s->contents + my_offset + 12);
2701 }
2702 else
2703 {
2704 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
2705 s->contents + my_offset);
2706
2707 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2708 s->contents + my_offset + 4);
2709
2710 /* It's a thumb address. Add the low order bit. */
2711 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2712 s->contents + my_offset + 8);
2713 }
2714 }
2715
2716 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2717
2718 tmp = bfd_get_32 (input_bfd, hit_data);
2719 tmp = tmp & 0xFF000000;
2720
2721 /* Somehow these are both 4 too far, so subtract 8. */
2722 ret_offset = (s->output_offset
2723 + my_offset
2724 + s->output_section->vma
2725 - (input_section->output_offset
2726 + input_section->output_section->vma
2727 + offset + addend)
2728 - 8);
2729
2730 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2731
2732 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2733
2734 return TRUE;
2735 }
2736
2737 /* Some relocations map to different relocations depending on the
2738 target. Return the real relocation. */
2739 static int
2740 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2741 int r_type)
2742 {
2743 switch (r_type)
2744 {
2745 case R_ARM_TARGET1:
2746 if (globals->target1_is_rel)
2747 return R_ARM_REL32;
2748 else
2749 return R_ARM_ABS32;
2750
2751 case R_ARM_TARGET2:
2752 return globals->target2_reloc;
2753
2754 default:
2755 return r_type;
2756 }
2757 }
2758
2759 /* Return the base VMA address which should be subtracted from real addresses
2760 when resolving @dtpoff relocation.
2761 This is PT_TLS segment p_vaddr. */
2762
2763 static bfd_vma
2764 dtpoff_base (struct bfd_link_info *info)
2765 {
2766 /* If tls_sec is NULL, we should have signalled an error already. */
2767 if (elf_hash_table (info)->tls_sec == NULL)
2768 return 0;
2769 return elf_hash_table (info)->tls_sec->vma;
2770 }
2771
2772 /* Return the relocation value for @tpoff relocation
2773 if STT_TLS virtual address is ADDRESS. */
2774
2775 static bfd_vma
2776 tpoff (struct bfd_link_info *info, bfd_vma address)
2777 {
2778 struct elf_link_hash_table *htab = elf_hash_table (info);
2779 bfd_vma base;
2780
2781 /* If tls_sec is NULL, we should have signalled an error already. */
2782 if (htab->tls_sec == NULL)
2783 return 0;
2784 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
2785 return address - htab->tls_sec->vma + base;
2786 }
2787
2788 /* Perform a relocation as part of a final link. */
2789
2790 static bfd_reloc_status_type
2791 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2792 bfd * input_bfd,
2793 bfd * output_bfd,
2794 asection * input_section,
2795 bfd_byte * contents,
2796 Elf_Internal_Rela * rel,
2797 bfd_vma value,
2798 struct bfd_link_info * info,
2799 asection * sym_sec,
2800 const char * sym_name,
2801 int sym_flags,
2802 struct elf_link_hash_entry * h,
2803 bfd_boolean * unresolved_reloc_p)
2804 {
2805 unsigned long r_type = howto->type;
2806 unsigned long r_symndx;
2807 bfd_byte * hit_data = contents + rel->r_offset;
2808 bfd * dynobj = NULL;
2809 Elf_Internal_Shdr * symtab_hdr;
2810 struct elf_link_hash_entry ** sym_hashes;
2811 bfd_vma * local_got_offsets;
2812 asection * sgot = NULL;
2813 asection * splt = NULL;
2814 asection * sreloc = NULL;
2815 bfd_vma addend;
2816 bfd_signed_vma signed_addend;
2817 struct elf32_arm_link_hash_table * globals;
2818
2819 globals = elf32_arm_hash_table (info);
2820
2821 /* Some relocation type map to different relocations depending on the
2822 target. We pick the right one here. */
2823 r_type = arm_real_reloc_type (globals, r_type);
2824 if (r_type != howto->type)
2825 howto = elf32_arm_howto_from_type (r_type);
2826
2827 /* If the start address has been set, then set the EF_ARM_HASENTRY
2828 flag. Setting this more than once is redundant, but the cost is
2829 not too high, and it keeps the code simple.
2830
2831 The test is done here, rather than somewhere else, because the
2832 start address is only set just before the final link commences.
2833
2834 Note - if the user deliberately sets a start address of 0, the
2835 flag will not be set. */
2836 if (bfd_get_start_address (output_bfd) != 0)
2837 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
2838
2839 dynobj = elf_hash_table (info)->dynobj;
2840 if (dynobj)
2841 {
2842 sgot = bfd_get_section_by_name (dynobj, ".got");
2843 splt = bfd_get_section_by_name (dynobj, ".plt");
2844 }
2845 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2846 sym_hashes = elf_sym_hashes (input_bfd);
2847 local_got_offsets = elf_local_got_offsets (input_bfd);
2848 r_symndx = ELF32_R_SYM (rel->r_info);
2849
2850 if (globals->use_rel)
2851 {
2852 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
2853
2854 if (addend & ((howto->src_mask + 1) >> 1))
2855 {
2856 signed_addend = -1;
2857 signed_addend &= ~ howto->src_mask;
2858 signed_addend |= addend;
2859 }
2860 else
2861 signed_addend = addend;
2862 }
2863 else
2864 addend = signed_addend = rel->r_addend;
2865
2866 switch (r_type)
2867 {
2868 case R_ARM_NONE:
2869 /* We don't need to find a value for this symbol. It's just a
2870 marker. */
2871 *unresolved_reloc_p = FALSE;
2872 return bfd_reloc_ok;
2873
2874 case R_ARM_PC24:
2875 case R_ARM_ABS32:
2876 case R_ARM_REL32:
2877 case R_ARM_CALL:
2878 case R_ARM_JUMP24:
2879 case R_ARM_XPC25:
2880 case R_ARM_PREL31:
2881 case R_ARM_PLT32:
2882 /* r_symndx will be zero only for relocs against symbols
2883 from removed linkonce sections, or sections discarded by
2884 a linker script. */
2885 if (r_symndx == 0)
2886 return bfd_reloc_ok;
2887
2888 /* Handle relocations which should use the PLT entry. ABS32/REL32
2889 will use the symbol's value, which may point to a PLT entry, but we
2890 don't need to handle that here. If we created a PLT entry, all
2891 branches in this object should go to it. */
2892 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
2893 && h != NULL
2894 && splt != NULL
2895 && h->plt.offset != (bfd_vma) -1)
2896 {
2897 /* If we've created a .plt section, and assigned a PLT entry to
2898 this function, it should not be known to bind locally. If
2899 it were, we would have cleared the PLT entry. */
2900 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
2901
2902 value = (splt->output_section->vma
2903 + splt->output_offset
2904 + h->plt.offset);
2905 *unresolved_reloc_p = FALSE;
2906 return _bfd_final_link_relocate (howto, input_bfd, input_section,
2907 contents, rel->r_offset, value,
2908 (bfd_vma) 0);
2909 }
2910
2911 /* When generating a shared object or relocatable executable, these
2912 relocations are copied into the output file to be resolved at
2913 run time. */
2914 if ((info->shared || globals->root.is_relocatable_executable)
2915 && (input_section->flags & SEC_ALLOC)
2916 && (r_type != R_ARM_REL32
2917 || !SYMBOL_CALLS_LOCAL (info, h))
2918 && (h == NULL
2919 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2920 || h->root.type != bfd_link_hash_undefweak)
2921 && r_type != R_ARM_PC24
2922 && r_type != R_ARM_CALL
2923 && r_type != R_ARM_JUMP24
2924 && r_type != R_ARM_PREL31
2925 && r_type != R_ARM_PLT32)
2926 {
2927 Elf_Internal_Rela outrel;
2928 bfd_byte *loc;
2929 bfd_boolean skip, relocate;
2930
2931 *unresolved_reloc_p = FALSE;
2932
2933 if (sreloc == NULL)
2934 {
2935 const char * name;
2936
2937 name = (bfd_elf_string_from_elf_section
2938 (input_bfd,
2939 elf_elfheader (input_bfd)->e_shstrndx,
2940 elf_section_data (input_section)->rel_hdr.sh_name));
2941 if (name == NULL)
2942 return bfd_reloc_notsupported;
2943
2944 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
2945 && strcmp (bfd_get_section_name (input_bfd,
2946 input_section),
2947 name + 4) == 0);
2948
2949 sreloc = bfd_get_section_by_name (dynobj, name);
2950 BFD_ASSERT (sreloc != NULL);
2951 }
2952
2953 skip = FALSE;
2954 relocate = FALSE;
2955
2956 outrel.r_offset =
2957 _bfd_elf_section_offset (output_bfd, info, input_section,
2958 rel->r_offset);
2959 if (outrel.r_offset == (bfd_vma) -1)
2960 skip = TRUE;
2961 else if (outrel.r_offset == (bfd_vma) -2)
2962 skip = TRUE, relocate = TRUE;
2963 outrel.r_offset += (input_section->output_section->vma
2964 + input_section->output_offset);
2965
2966 if (skip)
2967 memset (&outrel, 0, sizeof outrel);
2968 else if (h != NULL
2969 && h->dynindx != -1
2970 && (!info->shared
2971 || !info->symbolic
2972 || !h->def_regular))
2973 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2974 else
2975 {
2976 int symbol;
2977
2978 /* This symbol is local, or marked to become local. */
2979 relocate = TRUE;
2980 if (sym_flags == STT_ARM_TFUNC)
2981 value |= 1;
2982 if (globals->symbian_p)
2983 {
2984 /* On Symbian OS, the data segment and text segement
2985 can be relocated independently. Therefore, we
2986 must indicate the segment to which this
2987 relocation is relative. The BPABI allows us to
2988 use any symbol in the right segment; we just use
2989 the section symbol as it is convenient. (We
2990 cannot use the symbol given by "h" directly as it
2991 will not appear in the dynamic symbol table.) */
2992 if (sym_sec)
2993 symbol = elf_section_data (sym_sec->output_section)->dynindx;
2994 else
2995 symbol = elf_section_data (input_section->output_section)->dynindx;
2996 BFD_ASSERT (symbol != 0);
2997 }
2998 else
2999 /* On SVR4-ish systems, the dynamic loader cannot
3000 relocate the text and data segments independently,
3001 so the symbol does not matter. */
3002 symbol = 0;
3003 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
3004 }
3005
3006 loc = sreloc->contents;
3007 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3008 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3009
3010 /* If this reloc is against an external symbol, we do not want to
3011 fiddle with the addend. Otherwise, we need to include the symbol
3012 value so that it becomes an addend for the dynamic reloc. */
3013 if (! relocate)
3014 return bfd_reloc_ok;
3015
3016 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3017 contents, rel->r_offset, value,
3018 (bfd_vma) 0);
3019 }
3020 else switch (r_type)
3021 {
3022 case R_ARM_XPC25: /* Arm BLX instruction. */
3023 case R_ARM_CALL:
3024 case R_ARM_JUMP24:
3025 case R_ARM_PC24: /* Arm B/BL instruction */
3026 case R_ARM_PLT32:
3027 if (r_type == R_ARM_XPC25)
3028 {
3029 /* Check for Arm calling Arm function. */
3030 /* FIXME: Should we translate the instruction into a BL
3031 instruction instead ? */
3032 if (sym_flags != STT_ARM_TFUNC)
3033 (*_bfd_error_handler)
3034 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
3035 input_bfd,
3036 h ? h->root.root.string : "(local)");
3037 }
3038 else
3039 {
3040 /* Check for Arm calling Thumb function. */
3041 if (sym_flags == STT_ARM_TFUNC)
3042 {
3043 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
3044 output_bfd, input_section,
3045 hit_data, sym_sec, rel->r_offset,
3046 signed_addend, value);
3047 return bfd_reloc_ok;
3048 }
3049 }
3050
3051 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
3052 where:
3053 S is the address of the symbol in the relocation.
3054 P is address of the instruction being relocated.
3055 A is the addend (extracted from the instruction) in bytes.
3056
3057 S is held in 'value'.
3058 P is the base address of the section containing the
3059 instruction plus the offset of the reloc into that
3060 section, ie:
3061 (input_section->output_section->vma +
3062 input_section->output_offset +
3063 rel->r_offset).
3064 A is the addend, converted into bytes, ie:
3065 (signed_addend * 4)
3066
3067 Note: None of these operations have knowledge of the pipeline
3068 size of the processor, thus it is up to the assembler to
3069 encode this information into the addend. */
3070 value -= (input_section->output_section->vma
3071 + input_section->output_offset);
3072 value -= rel->r_offset;
3073 if (globals->use_rel)
3074 value += (signed_addend << howto->size);
3075 else
3076 /* RELA addends do not have to be adjusted by howto->size. */
3077 value += signed_addend;
3078
3079 signed_addend = value;
3080 signed_addend >>= howto->rightshift;
3081
3082 /* It is not an error for an undefined weak reference to be
3083 out of range. Any program that branches to such a symbol
3084 is going to crash anyway, so there is no point worrying
3085 about getting the destination exactly right. */
3086 if (! h || h->root.type != bfd_link_hash_undefweak)
3087 {
3088 /* Perform a signed range check. */
3089 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
3090 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
3091 return bfd_reloc_overflow;
3092 }
3093
3094 /* If necessary set the H bit in the BLX instruction. */
3095 if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
3096 value = (signed_addend & howto->dst_mask)
3097 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
3098 | (1 << 24);
3099 else
3100 value = (signed_addend & howto->dst_mask)
3101 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
3102 break;
3103
3104 case R_ARM_ABS32:
3105 value += addend;
3106 if (sym_flags == STT_ARM_TFUNC)
3107 value |= 1;
3108 break;
3109
3110 case R_ARM_REL32:
3111 value -= (input_section->output_section->vma
3112 + input_section->output_offset + rel->r_offset);
3113 value += addend;
3114 break;
3115
3116 case R_ARM_PREL31:
3117 value -= (input_section->output_section->vma
3118 + input_section->output_offset + rel->r_offset);
3119 value += signed_addend;
3120 if (! h || h->root.type != bfd_link_hash_undefweak)
3121 {
3122 /* Check for overflow */
3123 if ((value ^ (value >> 1)) & (1 << 30))
3124 return bfd_reloc_overflow;
3125 }
3126 value &= 0x7fffffff;
3127 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
3128 if (sym_flags == STT_ARM_TFUNC)
3129 value |= 1;
3130 break;
3131 }
3132
3133 bfd_put_32 (input_bfd, value, hit_data);
3134 return bfd_reloc_ok;
3135
3136 case R_ARM_ABS8:
3137 value += addend;
3138 if ((long) value > 0x7f || (long) value < -0x80)
3139 return bfd_reloc_overflow;
3140
3141 bfd_put_8 (input_bfd, value, hit_data);
3142 return bfd_reloc_ok;
3143
3144 case R_ARM_ABS16:
3145 value += addend;
3146
3147 if ((long) value > 0x7fff || (long) value < -0x8000)
3148 return bfd_reloc_overflow;
3149
3150 bfd_put_16 (input_bfd, value, hit_data);
3151 return bfd_reloc_ok;
3152
3153 case R_ARM_ABS12:
3154 /* Support ldr and str instruction for the arm */
3155 /* Also thumb b (unconditional branch). ??? Really? */
3156 value += addend;
3157
3158 if ((long) value > 0x7ff || (long) value < -0x800)
3159 return bfd_reloc_overflow;
3160
3161 value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
3162 bfd_put_32 (input_bfd, value, hit_data);
3163 return bfd_reloc_ok;
3164
3165 case R_ARM_THM_ABS5:
3166 /* Support ldr and str instructions for the thumb. */
3167 if (globals->use_rel)
3168 {
3169 /* Need to refetch addend. */
3170 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3171 /* ??? Need to determine shift amount from operand size. */
3172 addend >>= howto->rightshift;
3173 }
3174 value += addend;
3175
3176 /* ??? Isn't value unsigned? */
3177 if ((long) value > 0x1f || (long) value < -0x10)
3178 return bfd_reloc_overflow;
3179
3180 /* ??? Value needs to be properly shifted into place first. */
3181 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
3182 bfd_put_16 (input_bfd, value, hit_data);
3183 return bfd_reloc_ok;
3184
3185 case R_ARM_THM_XPC22:
3186 case R_ARM_THM_CALL:
3187 /* Thumb BL (branch long instruction). */
3188 {
3189 bfd_vma relocation;
3190 bfd_boolean overflow = FALSE;
3191 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3192 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3193 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3194 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3195 bfd_vma check;
3196 bfd_signed_vma signed_check;
3197 bfd_boolean thumb_plt_call = FALSE;
3198
3199 /* Need to refetch the addend and squish the two 11 bit pieces
3200 together. */
3201 if (globals->use_rel)
3202 {
3203 bfd_vma upper = upper_insn & 0x7ff;
3204 bfd_vma lower = lower_insn & 0x7ff;
3205 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
3206 addend = (upper << 12) | (lower << 1);
3207 signed_addend = addend;
3208 }
3209
3210 if (r_type == R_ARM_THM_XPC22)
3211 {
3212 /* Check for Thumb to Thumb call. */
3213 /* FIXME: Should we translate the instruction into a BL
3214 instruction instead ? */
3215 if (sym_flags == STT_ARM_TFUNC)
3216 (*_bfd_error_handler)
3217 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
3218 input_bfd,
3219 h ? h->root.root.string : "(local)");
3220 }
3221 else
3222 {
3223 /* If it is not a call to Thumb, assume call to Arm.
3224 If it is a call relative to a section name, then it is not a
3225 function call at all, but rather a long jump. Calls through
3226 the PLT do not require stubs. */
3227 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
3228 && (h == NULL || splt == NULL
3229 || h->plt.offset == (bfd_vma) -1))
3230 {
3231 if (elf32_thumb_to_arm_stub
3232 (info, sym_name, input_bfd, output_bfd, input_section,
3233 hit_data, sym_sec, rel->r_offset, signed_addend, value))
3234 return bfd_reloc_ok;
3235 else
3236 return bfd_reloc_dangerous;
3237 }
3238 }
3239
3240 /* Handle calls via the PLT. */
3241 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
3242 {
3243 value = (splt->output_section->vma
3244 + splt->output_offset
3245 + h->plt.offset);
3246 if (globals->use_blx)
3247 {
3248 /* If the Thumb BLX instruction is available, convert the
3249 BL to a BLX instruction to call the ARM-mode PLT entry. */
3250 if ((lower_insn & (0x3 << 11)) == 0x3 << 11)
3251 {
3252 lower_insn = (lower_insn & ~(0x3 << 11)) | 0x1 << 11;
3253 thumb_plt_call = TRUE;
3254 }
3255 }
3256 else
3257 /* Target the Thumb stub before the ARM PLT entry. */
3258 value -= PLT_THUMB_STUB_SIZE;
3259 *unresolved_reloc_p = FALSE;
3260 }
3261
3262 relocation = value + signed_addend;
3263
3264 relocation -= (input_section->output_section->vma
3265 + input_section->output_offset
3266 + rel->r_offset);
3267
3268 check = relocation >> howto->rightshift;
3269
3270 /* If this is a signed value, the rightshift just dropped
3271 leading 1 bits (assuming twos complement). */
3272 if ((bfd_signed_vma) relocation >= 0)
3273 signed_check = check;
3274 else
3275 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3276
3277 /* Assumes two's complement. */
3278 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3279 overflow = TRUE;
3280
3281 if ((r_type == R_ARM_THM_XPC22
3282 && ((lower_insn & 0x1800) == 0x0800))
3283 || thumb_plt_call)
3284 /* For a BLX instruction, make sure that the relocation is rounded up
3285 to a word boundary. This follows the semantics of the instruction
3286 which specifies that bit 1 of the target address will come from bit
3287 1 of the base address. */
3288 relocation = (relocation + 2) & ~ 3;
3289
3290 /* Put RELOCATION back into the insn. */
3291 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
3292 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
3293
3294 /* Put the relocated value back in the object file: */
3295 bfd_put_16 (input_bfd, upper_insn, hit_data);
3296 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3297
3298 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3299 }
3300 break;
3301
3302 case R_ARM_THM_JUMP24:
3303 /* Thumb32 unconditional branch instruction. */
3304 {
3305 bfd_vma relocation;
3306 bfd_boolean overflow = FALSE;
3307 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3308 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3309 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3310 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3311 bfd_vma check;
3312 bfd_signed_vma signed_check;
3313
3314 /* Need to refetch the addend, reconstruct the top three bits, and glue the
3315 two pieces together. */
3316 if (globals->use_rel)
3317 {
3318 bfd_vma S = (upper_insn & 0x0400) >> 10;
3319 bfd_vma hi = (upper_insn & 0x03ff);
3320 bfd_vma I1 = (lower_insn & 0x2000) >> 13;
3321 bfd_vma I2 = (lower_insn & 0x0800) >> 11;
3322 bfd_vma lo = (lower_insn & 0x07ff);
3323
3324 I1 = !(I1 ^ S);
3325 I2 = !(I2 ^ S);
3326 S = !S;
3327
3328 signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1);
3329 signed_addend -= (1 << 24); /* Sign extend. */
3330 }
3331
3332 /* ??? Should handle interworking? GCC might someday try to
3333 use this for tail calls. */
3334
3335 relocation = value + signed_addend;
3336 relocation -= (input_section->output_section->vma
3337 + input_section->output_offset
3338 + rel->r_offset);
3339
3340 check = relocation >> howto->rightshift;
3341
3342 /* If this is a signed value, the rightshift just dropped
3343 leading 1 bits (assuming twos complement). */
3344 if ((bfd_signed_vma) relocation >= 0)
3345 signed_check = check;
3346 else
3347 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3348
3349 /* Assumes two's complement. */
3350 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3351 overflow = TRUE;
3352
3353 /* Put RELOCATION back into the insn. */
3354 {
3355 bfd_vma S = (relocation & 0x01000000) >> 24;
3356 bfd_vma I1 = (relocation & 0x00800000) >> 23;
3357 bfd_vma I2 = (relocation & 0x00400000) >> 22;
3358 bfd_vma hi = (relocation & 0x003ff000) >> 12;
3359 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
3360
3361 I1 = !(I1 ^ S);
3362 I2 = !(I2 ^ S);
3363
3364 upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi;
3365 lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo;
3366 }
3367
3368 /* Put the relocated value back in the object file: */
3369 bfd_put_16 (input_bfd, upper_insn, hit_data);
3370 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3371
3372 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3373 }
3374
3375 case R_ARM_THM_JUMP19:
3376 /* Thumb32 conditional branch instruction. */
3377 {
3378 bfd_vma relocation;
3379 bfd_boolean overflow = FALSE;
3380 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3381 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3382 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3383 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3384 bfd_vma check;
3385 bfd_signed_vma signed_check;
3386
3387 /* Need to refetch the addend, reconstruct the top three bits,
3388 and squish the two 11 bit pieces together. */
3389 if (globals->use_rel)
3390 {
3391 bfd_vma S = (upper_insn & 0x0400) >> 10;
3392 bfd_vma upper = (upper_insn & 0x001f);
3393 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
3394 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
3395 bfd_vma lower = (lower_insn & 0x07ff);
3396
3397 upper |= J2 << 6;
3398 upper |= J1 << 7;
3399 upper |= ~S << 8;
3400 upper -= 0x0100; /* Sign extend. */
3401
3402 addend = (upper << 12) | (lower << 1);
3403 signed_addend = addend;
3404 }
3405
3406 /* ??? Should handle interworking? GCC might someday try to
3407 use this for tail calls. */
3408
3409 relocation = value + signed_addend;
3410 relocation -= (input_section->output_section->vma
3411 + input_section->output_offset
3412 + rel->r_offset);
3413
3414 check = relocation >> howto->rightshift;
3415
3416 /* If this is a signed value, the rightshift just dropped
3417 leading 1 bits (assuming twos complement). */
3418 if ((bfd_signed_vma) relocation >= 0)
3419 signed_check = check;
3420 else
3421 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3422
3423 /* Assumes two's complement. */
3424 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3425 overflow = TRUE;
3426
3427 /* Put RELOCATION back into the insn. */
3428 {
3429 bfd_vma S = (relocation & 0x00100000) >> 20;
3430 bfd_vma J2 = (relocation & 0x00080000) >> 19;
3431 bfd_vma J1 = (relocation & 0x00040000) >> 18;
3432 bfd_vma hi = (relocation & 0x0003f000) >> 12;
3433 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
3434
3435 upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi;
3436 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
3437 }
3438
3439 /* Put the relocated value back in the object file: */
3440 bfd_put_16 (input_bfd, upper_insn, hit_data);
3441 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3442
3443 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3444 }
3445
3446 case R_ARM_THM_JUMP11:
3447 case R_ARM_THM_JUMP8:
3448 case R_ARM_THM_JUMP6:
3449 /* Thumb B (branch) instruction). */
3450 {
3451 bfd_signed_vma relocation;
3452 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
3453 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3454 bfd_signed_vma signed_check;
3455
3456 /* CZB cannot jump backward. */
3457 if (r_type == R_ARM_THM_JUMP6)
3458 reloc_signed_min = 0;
3459
3460 if (globals->use_rel)
3461 {
3462 /* Need to refetch addend. */
3463 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3464 if (addend & ((howto->src_mask + 1) >> 1))
3465 {
3466 signed_addend = -1;
3467 signed_addend &= ~ howto->src_mask;
3468 signed_addend |= addend;
3469 }
3470 else
3471 signed_addend = addend;
3472 /* The value in the insn has been right shifted. We need to
3473 undo this, so that we can perform the address calculation
3474 in terms of bytes. */
3475 signed_addend <<= howto->rightshift;
3476 }
3477 relocation = value + signed_addend;
3478
3479 relocation -= (input_section->output_section->vma
3480 + input_section->output_offset
3481 + rel->r_offset);
3482
3483 relocation >>= howto->rightshift;
3484 signed_check = relocation;
3485
3486 if (r_type == R_ARM_THM_JUMP6)
3487 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
3488 else
3489 relocation &= howto->dst_mask;
3490 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
3491
3492 bfd_put_16 (input_bfd, relocation, hit_data);
3493
3494 /* Assumes two's complement. */
3495 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3496 return bfd_reloc_overflow;
3497
3498 return bfd_reloc_ok;
3499 }
3500
3501 case R_ARM_ALU_PCREL7_0:
3502 case R_ARM_ALU_PCREL15_8:
3503 case R_ARM_ALU_PCREL23_15:
3504 {
3505 bfd_vma insn;
3506 bfd_vma relocation;
3507
3508 insn = bfd_get_32 (input_bfd, hit_data);
3509 if (globals->use_rel)
3510 {
3511 /* Extract the addend. */
3512 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
3513 signed_addend = addend;
3514 }
3515 relocation = value + signed_addend;
3516
3517 relocation -= (input_section->output_section->vma
3518 + input_section->output_offset
3519 + rel->r_offset);
3520 insn = (insn & ~0xfff)
3521 | ((howto->bitpos << 7) & 0xf00)
3522 | ((relocation >> howto->bitpos) & 0xff);
3523 bfd_put_32 (input_bfd, value, hit_data);
3524 }
3525 return bfd_reloc_ok;
3526
3527 case R_ARM_GNU_VTINHERIT:
3528 case R_ARM_GNU_VTENTRY:
3529 return bfd_reloc_ok;
3530
3531 case R_ARM_GOTOFF32:
3532 /* Relocation is relative to the start of the
3533 global offset table. */
3534
3535 BFD_ASSERT (sgot != NULL);
3536 if (sgot == NULL)
3537 return bfd_reloc_notsupported;
3538
3539 /* If we are addressing a Thumb function, we need to adjust the
3540 address by one, so that attempts to call the function pointer will
3541 correctly interpret it as Thumb code. */
3542 if (sym_flags == STT_ARM_TFUNC)
3543 value += 1;
3544
3545 /* Note that sgot->output_offset is not involved in this
3546 calculation. We always want the start of .got. If we
3547 define _GLOBAL_OFFSET_TABLE in a different way, as is
3548 permitted by the ABI, we might have to change this
3549 calculation. */
3550 value -= sgot->output_section->vma;
3551 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3552 contents, rel->r_offset, value,
3553 (bfd_vma) 0);
3554
3555 case R_ARM_GOTPC:
3556 /* Use global offset table as symbol value. */
3557 BFD_ASSERT (sgot != NULL);
3558
3559 if (sgot == NULL)
3560 return bfd_reloc_notsupported;
3561
3562 *unresolved_reloc_p = FALSE;
3563 value = sgot->output_section->vma;
3564 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3565 contents, rel->r_offset, value,
3566 (bfd_vma) 0);
3567
3568 case R_ARM_GOT32:
3569 case R_ARM_GOT_PREL:
3570 /* Relocation is to the entry for this symbol in the
3571 global offset table. */
3572 if (sgot == NULL)
3573 return bfd_reloc_notsupported;
3574
3575 if (h != NULL)
3576 {
3577 bfd_vma off;
3578 bfd_boolean dyn;
3579
3580 off = h->got.offset;
3581 BFD_ASSERT (off != (bfd_vma) -1);
3582 dyn = globals->root.dynamic_sections_created;
3583
3584 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3585 || (info->shared
3586 && SYMBOL_REFERENCES_LOCAL (info, h))
3587 || (ELF_ST_VISIBILITY (h->other)
3588 && h->root.type == bfd_link_hash_undefweak))
3589 {
3590 /* This is actually a static link, or it is a -Bsymbolic link
3591 and the symbol is defined locally. We must initialize this
3592 entry in the global offset table. Since the offset must
3593 always be a multiple of 4, we use the least significant bit
3594 to record whether we have initialized it already.
3595
3596 When doing a dynamic link, we create a .rel.got relocation
3597 entry to initialize the value. This is done in the
3598 finish_dynamic_symbol routine. */
3599 if ((off & 1) != 0)
3600 off &= ~1;
3601 else
3602 {
3603 /* If we are addressing a Thumb function, we need to
3604 adjust the address by one, so that attempts to
3605 call the function pointer will correctly
3606 interpret it as Thumb code. */
3607 if (sym_flags == STT_ARM_TFUNC)
3608 value |= 1;
3609
3610 bfd_put_32 (output_bfd, value, sgot->contents + off);
3611 h->got.offset |= 1;
3612 }
3613 }
3614 else
3615 *unresolved_reloc_p = FALSE;
3616
3617 value = sgot->output_offset + off;
3618 }
3619 else
3620 {
3621 bfd_vma off;
3622
3623 BFD_ASSERT (local_got_offsets != NULL &&
3624 local_got_offsets[r_symndx] != (bfd_vma) -1);
3625
3626 off = local_got_offsets[r_symndx];
3627
3628 /* The offset must always be a multiple of 4. We use the
3629 least significant bit to record whether we have already
3630 generated the necessary reloc. */
3631 if ((off & 1) != 0)
3632 off &= ~1;
3633 else
3634 {
3635 /* If we are addressing a Thumb function, we need to
3636 adjust the address by one, so that attempts to
3637 call the function pointer will correctly
3638 interpret it as Thumb code. */
3639 if (sym_flags == STT_ARM_TFUNC)
3640 value |= 1;
3641
3642 bfd_put_32 (output_bfd, value, sgot->contents + off);
3643
3644 if (info->shared)
3645 {
3646 asection * srelgot;
3647 Elf_Internal_Rela outrel;
3648 bfd_byte *loc;
3649
3650 srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
3651 BFD_ASSERT (srelgot != NULL);
3652
3653 outrel.r_offset = (sgot->output_section->vma
3654 + sgot->output_offset
3655 + off);
3656 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3657 loc = srelgot->contents;
3658 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3659 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3660 }
3661
3662 local_got_offsets[r_symndx] |= 1;
3663 }
3664
3665 value = sgot->output_offset + off;
3666 }
3667 if (r_type != R_ARM_GOT32)
3668 value += sgot->output_section->vma;
3669
3670 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3671 contents, rel->r_offset, value,
3672 (bfd_vma) 0);
3673
3674 case R_ARM_TLS_LDO32:
3675 value = value - dtpoff_base (info);
3676
3677 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3678 contents, rel->r_offset, value, (bfd_vma) 0);
3679
3680 case R_ARM_TLS_LDM32:
3681 {
3682 bfd_vma off;
3683
3684 if (globals->sgot == NULL)
3685 abort ();
3686
3687 off = globals->tls_ldm_got.offset;
3688
3689 if ((off & 1) != 0)
3690 off &= ~1;
3691 else
3692 {
3693 /* If we don't know the module number, create a relocation
3694 for it. */
3695 if (info->shared)
3696 {
3697 Elf_Internal_Rela outrel;
3698 bfd_byte *loc;
3699
3700 if (globals->srelgot == NULL)
3701 abort ();
3702
3703 outrel.r_offset = (globals->sgot->output_section->vma
3704 + globals->sgot->output_offset + off);
3705 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
3706
3707 bfd_put_32 (output_bfd, 0, globals->sgot->contents + off);
3708
3709 loc = globals->srelgot->contents;
3710 loc += globals->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3711 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3712 }
3713 else
3714 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
3715
3716 globals->tls_ldm_got.offset |= 1;
3717 }
3718
3719 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3720 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3721
3722 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3723 contents, rel->r_offset, value,
3724 (bfd_vma) 0);
3725 }
3726
3727 case R_ARM_TLS_GD32:
3728 case R_ARM_TLS_IE32:
3729 {
3730 bfd_vma off;
3731 int indx;
3732 char tls_type;
3733
3734 if (globals->sgot == NULL)
3735 abort ();
3736
3737 indx = 0;
3738 if (h != NULL)
3739 {
3740 bfd_boolean dyn;
3741 dyn = globals->root.dynamic_sections_created;
3742 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3743 && (!info->shared
3744 || !SYMBOL_REFERENCES_LOCAL (info, h)))
3745 {
3746 *unresolved_reloc_p = FALSE;
3747 indx = h->dynindx;
3748 }
3749 off = h->got.offset;
3750 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
3751 }
3752 else
3753 {
3754 if (local_got_offsets == NULL)
3755 abort ();
3756 off = local_got_offsets[r_symndx];
3757 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
3758 }
3759
3760 if (tls_type == GOT_UNKNOWN)
3761 abort ();
3762
3763 if ((off & 1) != 0)
3764 off &= ~1;
3765 else
3766 {
3767 bfd_boolean need_relocs = FALSE;
3768 Elf_Internal_Rela outrel;
3769 bfd_byte *loc = NULL;
3770 int cur_off = off;
3771
3772 /* The GOT entries have not been initialized yet. Do it
3773 now, and emit any relocations. If both an IE GOT and a
3774 GD GOT are necessary, we emit the GD first. */
3775
3776 if ((info->shared || indx != 0)
3777 && (h == NULL
3778 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3779 || h->root.type != bfd_link_hash_undefweak))
3780 {
3781 need_relocs = TRUE;
3782 if (globals->srelgot == NULL)
3783 abort ();
3784 loc = globals->srelgot->contents;
3785 loc += globals->srelgot->reloc_count * sizeof (Elf32_External_Rel);
3786 }
3787
3788 if (tls_type & GOT_TLS_GD)
3789 {
3790 if (need_relocs)
3791 {
3792 outrel.r_offset = (globals->sgot->output_section->vma
3793 + globals->sgot->output_offset + cur_off);
3794 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
3795 bfd_put_32 (output_bfd, 0, globals->sgot->contents + cur_off);
3796
3797 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3798 globals->srelgot->reloc_count++;
3799 loc += sizeof (Elf32_External_Rel);
3800
3801 if (indx == 0)
3802 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3803 globals->sgot->contents + cur_off + 4);
3804 else
3805 {
3806 bfd_put_32 (output_bfd, 0,
3807 globals->sgot->contents + cur_off + 4);
3808
3809 outrel.r_info = ELF32_R_INFO (indx,
3810 R_ARM_TLS_DTPOFF32);
3811 outrel.r_offset += 4;
3812 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3813 globals->srelgot->reloc_count++;
3814 loc += sizeof (Elf32_External_Rel);
3815 }
3816 }
3817 else
3818 {
3819 /* If we are not emitting relocations for a
3820 general dynamic reference, then we must be in a
3821 static link or an executable link with the
3822 symbol binding locally. Mark it as belonging
3823 to module 1, the executable. */
3824 bfd_put_32 (output_bfd, 1,
3825 globals->sgot->contents + cur_off);
3826 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3827 globals->sgot->contents + cur_off + 4);
3828 }
3829
3830 cur_off += 8;
3831 }
3832
3833 if (tls_type & GOT_TLS_IE)
3834 {
3835 if (need_relocs)
3836 {
3837 outrel.r_offset = (globals->sgot->output_section->vma
3838 + globals->sgot->output_offset
3839 + cur_off);
3840 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
3841
3842 if (indx == 0)
3843 bfd_put_32 (output_bfd, value - dtpoff_base (info),
3844 globals->sgot->contents + cur_off);
3845 else
3846 bfd_put_32 (output_bfd, 0,
3847 globals->sgot->contents + cur_off);
3848
3849 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3850 globals->srelgot->reloc_count++;
3851 loc += sizeof (Elf32_External_Rel);
3852 }
3853 else
3854 bfd_put_32 (output_bfd, tpoff (info, value),
3855 globals->sgot->contents + cur_off);
3856 cur_off += 4;
3857 }
3858
3859 if (h != NULL)
3860 h->got.offset |= 1;
3861 else
3862 local_got_offsets[r_symndx] |= 1;
3863 }
3864
3865 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
3866 off += 8;
3867 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3868 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3869
3870 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3871 contents, rel->r_offset, value,
3872 (bfd_vma) 0);
3873 }
3874
3875 case R_ARM_TLS_LE32:
3876 if (info->shared)
3877 {
3878 (*_bfd_error_handler)
3879 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
3880 input_bfd, input_section,
3881 (long) rel->r_offset, howto->name);
3882 return FALSE;
3883 }
3884 else
3885 value = tpoff (info, value);
3886
3887 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3888 contents, rel->r_offset, value, (bfd_vma) 0);
3889
3890 case R_ARM_V4BX:
3891 if (globals->fix_v4bx)
3892 {
3893 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
3894
3895 /* Ensure that we have a BX instruction. */
3896 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
3897
3898 /* Preserve Rm (lowest four bits) and the condition code
3899 (highest four bits). Other bits encode MOV PC,Rm. */
3900 insn = (insn & 0xf000000f) | 0x01a0f000;
3901
3902 bfd_put_32 (input_bfd, insn, hit_data);
3903 }
3904 return bfd_reloc_ok;
3905
3906 default:
3907 return bfd_reloc_notsupported;
3908 }
3909 }
3910
3911 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
3912 static void
3913 arm_add_to_rel (bfd * abfd,
3914 bfd_byte * address,
3915 reloc_howto_type * howto,
3916 bfd_signed_vma increment)
3917 {
3918 bfd_signed_vma addend;
3919
3920 if (howto->type == R_ARM_THM_CALL)
3921 {
3922 int upper_insn, lower_insn;
3923 int upper, lower;
3924
3925 upper_insn = bfd_get_16 (abfd, address);
3926 lower_insn = bfd_get_16 (abfd, address + 2);
3927 upper = upper_insn & 0x7ff;
3928 lower = lower_insn & 0x7ff;
3929
3930 addend = (upper << 12) | (lower << 1);
3931 addend += increment;
3932 addend >>= 1;
3933
3934 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
3935 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
3936
3937 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
3938 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
3939 }
3940 else
3941 {
3942 bfd_vma contents;
3943
3944 contents = bfd_get_32 (abfd, address);
3945
3946 /* Get the (signed) value from the instruction. */
3947 addend = contents & howto->src_mask;
3948 if (addend & ((howto->src_mask + 1) >> 1))
3949 {
3950 bfd_signed_vma mask;
3951
3952 mask = -1;
3953 mask &= ~ howto->src_mask;
3954 addend |= mask;
3955 }
3956
3957 /* Add in the increment, (which is a byte value). */
3958 switch (howto->type)
3959 {
3960 default:
3961 addend += increment;
3962 break;
3963
3964 case R_ARM_PC24:
3965 case R_ARM_PLT32:
3966 case R_ARM_CALL:
3967 case R_ARM_JUMP24:
3968 addend <<= howto->size;
3969 addend += increment;
3970
3971 /* Should we check for overflow here ? */
3972
3973 /* Drop any undesired bits. */
3974 addend >>= howto->rightshift;
3975 break;
3976 }
3977
3978 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
3979
3980 bfd_put_32 (abfd, contents, address);
3981 }
3982 }
3983
3984 #define IS_ARM_TLS_RELOC(R_TYPE) \
3985 ((R_TYPE) == R_ARM_TLS_GD32 \
3986 || (R_TYPE) == R_ARM_TLS_LDO32 \
3987 || (R_TYPE) == R_ARM_TLS_LDM32 \
3988 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
3989 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
3990 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
3991 || (R_TYPE) == R_ARM_TLS_LE32 \
3992 || (R_TYPE) == R_ARM_TLS_IE32)
3993
3994 /* Relocate an ARM ELF section. */
3995 static bfd_boolean
3996 elf32_arm_relocate_section (bfd * output_bfd,
3997 struct bfd_link_info * info,
3998 bfd * input_bfd,
3999 asection * input_section,
4000 bfd_byte * contents,
4001 Elf_Internal_Rela * relocs,
4002 Elf_Internal_Sym * local_syms,
4003 asection ** local_sections)
4004 {
4005 Elf_Internal_Shdr *symtab_hdr;
4006 struct elf_link_hash_entry **sym_hashes;
4007 Elf_Internal_Rela *rel;
4008 Elf_Internal_Rela *relend;
4009 const char *name;
4010 struct elf32_arm_link_hash_table * globals;
4011
4012 globals = elf32_arm_hash_table (info);
4013 if (info->relocatable && !globals->use_rel)
4014 return TRUE;
4015
4016 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
4017 sym_hashes = elf_sym_hashes (input_bfd);
4018
4019 rel = relocs;
4020 relend = relocs + input_section->reloc_count;
4021 for (; rel < relend; rel++)
4022 {
4023 int r_type;
4024 reloc_howto_type * howto;
4025 unsigned long r_symndx;
4026 Elf_Internal_Sym * sym;
4027 asection * sec;
4028 struct elf_link_hash_entry * h;
4029 bfd_vma relocation;
4030 bfd_reloc_status_type r;
4031 arelent bfd_reloc;
4032 char sym_type;
4033 bfd_boolean unresolved_reloc = FALSE;
4034
4035 r_symndx = ELF32_R_SYM (rel->r_info);
4036 r_type = ELF32_R_TYPE (rel->r_info);
4037 r_type = arm_real_reloc_type (globals, r_type);
4038
4039 if ( r_type == R_ARM_GNU_VTENTRY
4040 || r_type == R_ARM_GNU_VTINHERIT)
4041 continue;
4042
4043 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
4044 howto = bfd_reloc.howto;
4045
4046 if (info->relocatable && globals->use_rel)
4047 {
4048 /* This is a relocatable link. We don't have to change
4049 anything, unless the reloc is against a section symbol,
4050 in which case we have to adjust according to where the
4051 section symbol winds up in the output section. */
4052 if (r_symndx < symtab_hdr->sh_info)
4053 {
4054 sym = local_syms + r_symndx;
4055 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4056 {
4057 sec = local_sections[r_symndx];
4058 arm_add_to_rel (input_bfd, contents + rel->r_offset,
4059 howto,
4060 (bfd_signed_vma) (sec->output_offset
4061 + sym->st_value));
4062 }
4063 }
4064
4065 continue;
4066 }
4067
4068 /* This is a final link. */
4069 h = NULL;
4070 sym = NULL;
4071 sec = NULL;
4072
4073 if (r_symndx < symtab_hdr->sh_info)
4074 {
4075 sym = local_syms + r_symndx;
4076 sym_type = ELF32_ST_TYPE (sym->st_info);
4077 sec = local_sections[r_symndx];
4078 if (globals->use_rel)
4079 {
4080 relocation = (sec->output_section->vma
4081 + sec->output_offset
4082 + sym->st_value);
4083 if ((sec->flags & SEC_MERGE)
4084 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4085 {
4086 asection *msec;
4087 bfd_vma addend, value;
4088
4089 if (howto->rightshift)
4090 {
4091 (*_bfd_error_handler)
4092 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
4093 input_bfd, input_section,
4094 (long) rel->r_offset, howto->name);
4095 return FALSE;
4096 }
4097
4098 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
4099
4100 /* Get the (signed) value from the instruction. */
4101 addend = value & howto->src_mask;
4102 if (addend & ((howto->src_mask + 1) >> 1))
4103 {
4104 bfd_signed_vma mask;
4105
4106 mask = -1;
4107 mask &= ~ howto->src_mask;
4108 addend |= mask;
4109 }
4110 msec = sec;
4111 addend =
4112 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
4113 - relocation;
4114 addend += msec->output_section->vma + msec->output_offset;
4115 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
4116 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
4117 }
4118 }
4119 else
4120 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4121 }
4122 else
4123 {
4124 bfd_boolean warned;
4125
4126 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4127 r_symndx, symtab_hdr, sym_hashes,
4128 h, sec, relocation,
4129 unresolved_reloc, warned);
4130
4131 sym_type = h->type;
4132 }
4133
4134 if (h != NULL)
4135 name = h->root.root.string;
4136 else
4137 {
4138 name = (bfd_elf_string_from_elf_section
4139 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4140 if (name == NULL || *name == '\0')
4141 name = bfd_section_name (input_bfd, sec);
4142 }
4143
4144 if (r_symndx != 0
4145 && r_type != R_ARM_NONE
4146 && (h == NULL
4147 || h->root.type == bfd_link_hash_defined
4148 || h->root.type == bfd_link_hash_defweak)
4149 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
4150 {
4151 (*_bfd_error_handler)
4152 ((sym_type == STT_TLS
4153 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4154 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4155 input_bfd,
4156 input_section,
4157 (long) rel->r_offset,
4158 howto->name,
4159 name);
4160 }
4161
4162 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
4163 input_section, contents, rel,
4164 relocation, info, sec, name,
4165 (h ? ELF_ST_TYPE (h->type) :
4166 ELF_ST_TYPE (sym->st_info)), h,
4167 &unresolved_reloc);
4168
4169 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4170 because such sections are not SEC_ALLOC and thus ld.so will
4171 not process them. */
4172 if (unresolved_reloc
4173 && !((input_section->flags & SEC_DEBUGGING) != 0
4174 && h->def_dynamic))
4175 {
4176 (*_bfd_error_handler)
4177 (_("%B(%A+0x%lx): warning: unresolvable relocation %d against symbol `%s'"),
4178 input_bfd, input_section, (long) rel->r_offset,
4179 r_type, h->root.root.string);
4180 return FALSE;
4181 }
4182
4183 if (r != bfd_reloc_ok)
4184 {
4185 const char * msg = (const char *) 0;
4186
4187 switch (r)
4188 {
4189 case bfd_reloc_overflow:
4190 /* If the overflowing reloc was to an undefined symbol,
4191 we have already printed one error message and there
4192 is no point complaining again. */
4193 if ((! h ||
4194 h->root.type != bfd_link_hash_undefined)
4195 && (!((*info->callbacks->reloc_overflow)
4196 (info, (h ? &h->root : NULL), name, howto->name,
4197 (bfd_vma) 0, input_bfd, input_section,
4198 rel->r_offset))))
4199 return FALSE;
4200 break;
4201
4202 case bfd_reloc_undefined:
4203 if (!((*info->callbacks->undefined_symbol)
4204 (info, name, input_bfd, input_section,
4205 rel->r_offset, TRUE)))
4206 return FALSE;
4207 break;
4208
4209 case bfd_reloc_outofrange:
4210 msg = _("internal error: out of range error");
4211 goto common_error;
4212
4213 case bfd_reloc_notsupported:
4214 msg = _("internal error: unsupported relocation error");
4215 goto common_error;
4216
4217 case bfd_reloc_dangerous:
4218 msg = _("internal error: dangerous error");
4219 goto common_error;
4220
4221 default:
4222 msg = _("internal error: unknown error");
4223 /* fall through */
4224
4225 common_error:
4226 if (!((*info->callbacks->warning)
4227 (info, msg, name, input_bfd, input_section,
4228 rel->r_offset)))
4229 return FALSE;
4230 break;
4231 }
4232 }
4233 }
4234
4235 return TRUE;
4236 }
4237
4238 /* Set the right machine number. */
4239
4240 static bfd_boolean
4241 elf32_arm_object_p (bfd *abfd)
4242 {
4243 unsigned int mach;
4244
4245 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
4246
4247 if (mach != bfd_mach_arm_unknown)
4248 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
4249
4250 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
4251 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
4252
4253 else
4254 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
4255
4256 return TRUE;
4257 }
4258
4259 /* Function to keep ARM specific flags in the ELF header. */
4260
4261 static bfd_boolean
4262 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
4263 {
4264 if (elf_flags_init (abfd)
4265 && elf_elfheader (abfd)->e_flags != flags)
4266 {
4267 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
4268 {
4269 if (flags & EF_ARM_INTERWORK)
4270 (*_bfd_error_handler)
4271 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
4272 abfd);
4273 else
4274 _bfd_error_handler
4275 (_("Warning: Clearing the interworking flag of %B due to outside request"),
4276 abfd);
4277 }
4278 }
4279 else
4280 {
4281 elf_elfheader (abfd)->e_flags = flags;
4282 elf_flags_init (abfd) = TRUE;
4283 }
4284
4285 return TRUE;
4286 }
4287
4288 /* Copy backend specific data from one object module to another. */
4289
4290 static bfd_boolean
4291 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4292 {
4293 flagword in_flags;
4294 flagword out_flags;
4295
4296 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4297 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4298 return TRUE;
4299
4300 in_flags = elf_elfheader (ibfd)->e_flags;
4301 out_flags = elf_elfheader (obfd)->e_flags;
4302
4303 if (elf_flags_init (obfd)
4304 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
4305 && in_flags != out_flags)
4306 {
4307 /* Cannot mix APCS26 and APCS32 code. */
4308 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
4309 return FALSE;
4310
4311 /* Cannot mix float APCS and non-float APCS code. */
4312 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
4313 return FALSE;
4314
4315 /* If the src and dest have different interworking flags
4316 then turn off the interworking bit. */
4317 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
4318 {
4319 if (out_flags & EF_ARM_INTERWORK)
4320 _bfd_error_handler
4321 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
4322 obfd, ibfd);
4323
4324 in_flags &= ~EF_ARM_INTERWORK;
4325 }
4326
4327 /* Likewise for PIC, though don't warn for this case. */
4328 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
4329 in_flags &= ~EF_ARM_PIC;
4330 }
4331
4332 elf_elfheader (obfd)->e_flags = in_flags;
4333 elf_flags_init (obfd) = TRUE;
4334
4335 /* Also copy the EI_OSABI field. */
4336 elf_elfheader (obfd)->e_ident[EI_OSABI] =
4337 elf_elfheader (ibfd)->e_ident[EI_OSABI];
4338
4339 return TRUE;
4340 }
4341
4342 /* Merge backend specific data from an object file to the output
4343 object file when linking. */
4344
4345 static bfd_boolean
4346 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
4347 {
4348 flagword out_flags;
4349 flagword in_flags;
4350 bfd_boolean flags_compatible = TRUE;
4351 asection *sec;
4352
4353 /* Check if we have the same endianess. */
4354 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4355 return FALSE;
4356
4357 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4358 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4359 return TRUE;
4360
4361 /* The input BFD must have had its flags initialised. */
4362 /* The following seems bogus to me -- The flags are initialized in
4363 the assembler but I don't think an elf_flags_init field is
4364 written into the object. */
4365 /* BFD_ASSERT (elf_flags_init (ibfd)); */
4366
4367 in_flags = elf_elfheader (ibfd)->e_flags;
4368 out_flags = elf_elfheader (obfd)->e_flags;
4369
4370 if (!elf_flags_init (obfd))
4371 {
4372 /* If the input is the default architecture and had the default
4373 flags then do not bother setting the flags for the output
4374 architecture, instead allow future merges to do this. If no
4375 future merges ever set these flags then they will retain their
4376 uninitialised values, which surprise surprise, correspond
4377 to the default values. */
4378 if (bfd_get_arch_info (ibfd)->the_default
4379 && elf_elfheader (ibfd)->e_flags == 0)
4380 return TRUE;
4381
4382 elf_flags_init (obfd) = TRUE;
4383 elf_elfheader (obfd)->e_flags = in_flags;
4384
4385 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
4386 && bfd_get_arch_info (obfd)->the_default)
4387 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
4388
4389 return TRUE;
4390 }
4391
4392 /* Determine what should happen if the input ARM architecture
4393 does not match the output ARM architecture. */
4394 if (! bfd_arm_merge_machines (ibfd, obfd))
4395 return FALSE;
4396
4397 /* Identical flags must be compatible. */
4398 if (in_flags == out_flags)
4399 return TRUE;
4400
4401 /* Check to see if the input BFD actually contains any sections. If
4402 not, its flags may not have been initialised either, but it
4403 cannot actually cause any incompatibility. Do not short-circuit
4404 dynamic objects; their section list may be emptied by
4405 elf_link_add_object_symbols.
4406
4407 Also check to see if there are no code sections in the input.
4408 In this case there is no need to check for code specific flags.
4409 XXX - do we need to worry about floating-point format compatability
4410 in data sections ? */
4411 if (!(ibfd->flags & DYNAMIC))
4412 {
4413 bfd_boolean null_input_bfd = TRUE;
4414 bfd_boolean only_data_sections = TRUE;
4415
4416 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4417 {
4418 /* Ignore synthetic glue sections. */
4419 if (strcmp (sec->name, ".glue_7")
4420 && strcmp (sec->name, ".glue_7t"))
4421 {
4422 if ((bfd_get_section_flags (ibfd, sec)
4423 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4424 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4425 only_data_sections = FALSE;
4426
4427 null_input_bfd = FALSE;
4428 break;
4429 }
4430 }
4431
4432 if (null_input_bfd || only_data_sections)
4433 return TRUE;
4434 }
4435
4436 /* Complain about various flag mismatches. */
4437 if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
4438 {
4439 _bfd_error_handler
4440 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
4441 ibfd, obfd,
4442 (in_flags & EF_ARM_EABIMASK) >> 24,
4443 (out_flags & EF_ARM_EABIMASK) >> 24);
4444 return FALSE;
4445 }
4446
4447 /* Not sure what needs to be checked for EABI versions >= 1. */
4448 if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
4449 {
4450 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
4451 {
4452 _bfd_error_handler
4453 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
4454 ibfd, obfd,
4455 in_flags & EF_ARM_APCS_26 ? 26 : 32,
4456 out_flags & EF_ARM_APCS_26 ? 26 : 32);
4457 flags_compatible = FALSE;
4458 }
4459
4460 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
4461 {
4462 if (in_flags & EF_ARM_APCS_FLOAT)
4463 _bfd_error_handler
4464 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
4465 ibfd, obfd);
4466 else
4467 _bfd_error_handler
4468 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
4469 ibfd, obfd);
4470
4471 flags_compatible = FALSE;
4472 }
4473
4474 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
4475 {
4476 if (in_flags & EF_ARM_VFP_FLOAT)
4477 _bfd_error_handler
4478 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
4479 ibfd, obfd);
4480 else
4481 _bfd_error_handler
4482 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
4483 ibfd, obfd);
4484
4485 flags_compatible = FALSE;
4486 }
4487
4488 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
4489 {
4490 if (in_flags & EF_ARM_MAVERICK_FLOAT)
4491 _bfd_error_handler
4492 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
4493 ibfd, obfd);
4494 else
4495 _bfd_error_handler
4496 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
4497 ibfd, obfd);
4498
4499 flags_compatible = FALSE;
4500 }
4501
4502 #ifdef EF_ARM_SOFT_FLOAT
4503 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
4504 {
4505 /* We can allow interworking between code that is VFP format
4506 layout, and uses either soft float or integer regs for
4507 passing floating point arguments and results. We already
4508 know that the APCS_FLOAT flags match; similarly for VFP
4509 flags. */
4510 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
4511 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
4512 {
4513 if (in_flags & EF_ARM_SOFT_FLOAT)
4514 _bfd_error_handler
4515 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
4516 ibfd, obfd);
4517 else
4518 _bfd_error_handler
4519 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
4520 ibfd, obfd);
4521
4522 flags_compatible = FALSE;
4523 }
4524 }
4525 #endif
4526
4527 /* Interworking mismatch is only a warning. */
4528 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
4529 {
4530 if (in_flags & EF_ARM_INTERWORK)
4531 {
4532 _bfd_error_handler
4533 (_("Warning: %B supports interworking, whereas %B does not"),
4534 ibfd, obfd);
4535 }
4536 else
4537 {
4538 _bfd_error_handler
4539 (_("Warning: %B does not support interworking, whereas %B does"),
4540 ibfd, obfd);
4541 }
4542 }
4543 }
4544
4545 return flags_compatible;
4546 }
4547
4548 /* Display the flags field. */
4549
4550 static bfd_boolean
4551 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
4552 {
4553 FILE * file = (FILE *) ptr;
4554 unsigned long flags;
4555
4556 BFD_ASSERT (abfd != NULL && ptr != NULL);
4557
4558 /* Print normal ELF private data. */
4559 _bfd_elf_print_private_bfd_data (abfd, ptr);
4560
4561 flags = elf_elfheader (abfd)->e_flags;
4562 /* Ignore init flag - it may not be set, despite the flags field
4563 containing valid data. */
4564
4565 /* xgettext:c-format */
4566 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4567
4568 switch (EF_ARM_EABI_VERSION (flags))
4569 {
4570 case EF_ARM_EABI_UNKNOWN:
4571 /* The following flag bits are GNU extensions and not part of the
4572 official ARM ELF extended ABI. Hence they are only decoded if
4573 the EABI version is not set. */
4574 if (flags & EF_ARM_INTERWORK)
4575 fprintf (file, _(" [interworking enabled]"));
4576
4577 if (flags & EF_ARM_APCS_26)
4578 fprintf (file, " [APCS-26]");
4579 else
4580 fprintf (file, " [APCS-32]");
4581
4582 if (flags & EF_ARM_VFP_FLOAT)
4583 fprintf (file, _(" [VFP float format]"));
4584 else if (flags & EF_ARM_MAVERICK_FLOAT)
4585 fprintf (file, _(" [Maverick float format]"));
4586 else
4587 fprintf (file, _(" [FPA float format]"));
4588
4589 if (flags & EF_ARM_APCS_FLOAT)
4590 fprintf (file, _(" [floats passed in float registers]"));
4591
4592 if (flags & EF_ARM_PIC)
4593 fprintf (file, _(" [position independent]"));
4594
4595 if (flags & EF_ARM_NEW_ABI)
4596 fprintf (file, _(" [new ABI]"));
4597
4598 if (flags & EF_ARM_OLD_ABI)
4599 fprintf (file, _(" [old ABI]"));
4600
4601 if (flags & EF_ARM_SOFT_FLOAT)
4602 fprintf (file, _(" [software FP]"));
4603
4604 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
4605 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
4606 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
4607 | EF_ARM_MAVERICK_FLOAT);
4608 break;
4609
4610 case EF_ARM_EABI_VER1:
4611 fprintf (file, _(" [Version1 EABI]"));
4612
4613 if (flags & EF_ARM_SYMSARESORTED)
4614 fprintf (file, _(" [sorted symbol table]"));
4615 else
4616 fprintf (file, _(" [unsorted symbol table]"));
4617
4618 flags &= ~ EF_ARM_SYMSARESORTED;
4619 break;
4620
4621 case EF_ARM_EABI_VER2:
4622 fprintf (file, _(" [Version2 EABI]"));
4623
4624 if (flags & EF_ARM_SYMSARESORTED)
4625 fprintf (file, _(" [sorted symbol table]"));
4626 else
4627 fprintf (file, _(" [unsorted symbol table]"));
4628
4629 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
4630 fprintf (file, _(" [dynamic symbols use segment index]"));
4631
4632 if (flags & EF_ARM_MAPSYMSFIRST)
4633 fprintf (file, _(" [mapping symbols precede others]"));
4634
4635 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
4636 | EF_ARM_MAPSYMSFIRST);
4637 break;
4638
4639 case EF_ARM_EABI_VER3:
4640 fprintf (file, _(" [Version3 EABI]"));
4641 break;
4642
4643 case EF_ARM_EABI_VER4:
4644 fprintf (file, _(" [Version4 EABI]"));
4645
4646 if (flags & EF_ARM_BE8)
4647 fprintf (file, _(" [BE8]"));
4648
4649 if (flags & EF_ARM_LE8)
4650 fprintf (file, _(" [LE8]"));
4651
4652 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
4653 break;
4654
4655 default:
4656 fprintf (file, _(" <EABI version unrecognised>"));
4657 break;
4658 }
4659
4660 flags &= ~ EF_ARM_EABIMASK;
4661
4662 if (flags & EF_ARM_RELEXEC)
4663 fprintf (file, _(" [relocatable executable]"));
4664
4665 if (flags & EF_ARM_HASENTRY)
4666 fprintf (file, _(" [has entry point]"));
4667
4668 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
4669
4670 if (flags)
4671 fprintf (file, _("<Unrecognised flag bits set>"));
4672
4673 fputc ('\n', file);
4674
4675 return TRUE;
4676 }
4677
4678 static int
4679 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
4680 {
4681 switch (ELF_ST_TYPE (elf_sym->st_info))
4682 {
4683 case STT_ARM_TFUNC:
4684 return ELF_ST_TYPE (elf_sym->st_info);
4685
4686 case STT_ARM_16BIT:
4687 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
4688 This allows us to distinguish between data used by Thumb instructions
4689 and non-data (which is probably code) inside Thumb regions of an
4690 executable. */
4691 if (type != STT_OBJECT)
4692 return ELF_ST_TYPE (elf_sym->st_info);
4693 break;
4694
4695 default:
4696 break;
4697 }
4698
4699 return type;
4700 }
4701
4702 static asection *
4703 elf32_arm_gc_mark_hook (asection * sec,
4704 struct bfd_link_info * info ATTRIBUTE_UNUSED,
4705 Elf_Internal_Rela * rel,
4706 struct elf_link_hash_entry * h,
4707 Elf_Internal_Sym * sym)
4708 {
4709 if (h != NULL)
4710 {
4711 switch (ELF32_R_TYPE (rel->r_info))
4712 {
4713 case R_ARM_GNU_VTINHERIT:
4714 case R_ARM_GNU_VTENTRY:
4715 break;
4716
4717 default:
4718 switch (h->root.type)
4719 {
4720 case bfd_link_hash_defined:
4721 case bfd_link_hash_defweak:
4722 return h->root.u.def.section;
4723
4724 case bfd_link_hash_common:
4725 return h->root.u.c.p->section;
4726
4727 default:
4728 break;
4729 }
4730 }
4731 }
4732 else
4733 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4734
4735 return NULL;
4736 }
4737
4738 /* Update the got entry reference counts for the section being removed. */
4739
4740 static bfd_boolean
4741 elf32_arm_gc_sweep_hook (bfd * abfd,
4742 struct bfd_link_info * info,
4743 asection * sec,
4744 const Elf_Internal_Rela * relocs)
4745 {
4746 Elf_Internal_Shdr *symtab_hdr;
4747 struct elf_link_hash_entry **sym_hashes;
4748 bfd_signed_vma *local_got_refcounts;
4749 const Elf_Internal_Rela *rel, *relend;
4750 struct elf32_arm_link_hash_table * globals;
4751
4752 globals = elf32_arm_hash_table (info);
4753
4754 elf_section_data (sec)->local_dynrel = NULL;
4755
4756 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4757 sym_hashes = elf_sym_hashes (abfd);
4758 local_got_refcounts = elf_local_got_refcounts (abfd);
4759
4760 relend = relocs + sec->reloc_count;
4761 for (rel = relocs; rel < relend; rel++)
4762 {
4763 unsigned long r_symndx;
4764 struct elf_link_hash_entry *h = NULL;
4765 int r_type;
4766
4767 r_symndx = ELF32_R_SYM (rel->r_info);
4768 if (r_symndx >= symtab_hdr->sh_info)
4769 {
4770 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4771 while (h->root.type == bfd_link_hash_indirect
4772 || h->root.type == bfd_link_hash_warning)
4773 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4774 }
4775
4776 r_type = ELF32_R_TYPE (rel->r_info);
4777 r_type = arm_real_reloc_type (globals, r_type);
4778 switch (r_type)
4779 {
4780 case R_ARM_GOT32:
4781 case R_ARM_GOT_PREL:
4782 case R_ARM_TLS_GD32:
4783 case R_ARM_TLS_IE32:
4784 if (h != NULL)
4785 {
4786 if (h->got.refcount > 0)
4787 h->got.refcount -= 1;
4788 }
4789 else if (local_got_refcounts != NULL)
4790 {
4791 if (local_got_refcounts[r_symndx] > 0)
4792 local_got_refcounts[r_symndx] -= 1;
4793 }
4794 break;
4795
4796 case R_ARM_TLS_LDM32:
4797 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
4798 break;
4799
4800 case R_ARM_ABS32:
4801 case R_ARM_REL32:
4802 case R_ARM_PC24:
4803 case R_ARM_PLT32:
4804 case R_ARM_CALL:
4805 case R_ARM_JUMP24:
4806 case R_ARM_PREL31:
4807 case R_ARM_THM_CALL:
4808 /* Should the interworking branches be here also? */
4809
4810 if (h != NULL)
4811 {
4812 struct elf32_arm_link_hash_entry *eh;
4813 struct elf32_arm_relocs_copied **pp;
4814 struct elf32_arm_relocs_copied *p;
4815
4816 eh = (struct elf32_arm_link_hash_entry *) h;
4817
4818 if (h->plt.refcount > 0)
4819 {
4820 h->plt.refcount -= 1;
4821 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL)
4822 eh->plt_thumb_refcount--;
4823 }
4824
4825 if (r_type == R_ARM_ABS32
4826 || r_type == R_ARM_REL32)
4827 {
4828 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
4829 pp = &p->next)
4830 if (p->section == sec)
4831 {
4832 p->count -= 1;
4833 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
4834 p->pc_count -= 1;
4835 if (p->count == 0)
4836 *pp = p->next;
4837 break;
4838 }
4839 }
4840 }
4841 break;
4842
4843 default:
4844 break;
4845 }
4846 }
4847
4848 return TRUE;
4849 }
4850
4851 /* Look through the relocs for a section during the first phase. */
4852
4853 static bfd_boolean
4854 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
4855 asection *sec, const Elf_Internal_Rela *relocs)
4856 {
4857 Elf_Internal_Shdr *symtab_hdr;
4858 struct elf_link_hash_entry **sym_hashes;
4859 struct elf_link_hash_entry **sym_hashes_end;
4860 const Elf_Internal_Rela *rel;
4861 const Elf_Internal_Rela *rel_end;
4862 bfd *dynobj;
4863 asection *sreloc;
4864 bfd_vma *local_got_offsets;
4865 struct elf32_arm_link_hash_table *htab;
4866
4867 if (info->relocatable)
4868 return TRUE;
4869
4870 htab = elf32_arm_hash_table (info);
4871 sreloc = NULL;
4872
4873 /* Create dynamic sections for relocatable executables so that we can
4874 copy relocations. */
4875 if (htab->root.is_relocatable_executable
4876 && ! htab->root.dynamic_sections_created)
4877 {
4878 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
4879 return FALSE;
4880 }
4881
4882 dynobj = elf_hash_table (info)->dynobj;
4883 local_got_offsets = elf_local_got_offsets (abfd);
4884
4885 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4886 sym_hashes = elf_sym_hashes (abfd);
4887 sym_hashes_end = sym_hashes
4888 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
4889
4890 if (!elf_bad_symtab (abfd))
4891 sym_hashes_end -= symtab_hdr->sh_info;
4892
4893 rel_end = relocs + sec->reloc_count;
4894 for (rel = relocs; rel < rel_end; rel++)
4895 {
4896 struct elf_link_hash_entry *h;
4897 struct elf32_arm_link_hash_entry *eh;
4898 unsigned long r_symndx;
4899 int r_type;
4900
4901 r_symndx = ELF32_R_SYM (rel->r_info);
4902 r_type = ELF32_R_TYPE (rel->r_info);
4903 r_type = arm_real_reloc_type (htab, r_type);
4904
4905 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
4906 {
4907 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
4908 r_symndx);
4909 return FALSE;
4910 }
4911
4912 if (r_symndx < symtab_hdr->sh_info)
4913 h = NULL;
4914 else
4915 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4916
4917 eh = (struct elf32_arm_link_hash_entry *) h;
4918
4919 switch (r_type)
4920 {
4921 case R_ARM_GOT32:
4922 case R_ARM_GOT_PREL:
4923 case R_ARM_TLS_GD32:
4924 case R_ARM_TLS_IE32:
4925 /* This symbol requires a global offset table entry. */
4926 {
4927 int tls_type, old_tls_type;
4928
4929 switch (r_type)
4930 {
4931 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
4932 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
4933 default: tls_type = GOT_NORMAL; break;
4934 }
4935
4936 if (h != NULL)
4937 {
4938 h->got.refcount++;
4939 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
4940 }
4941 else
4942 {
4943 bfd_signed_vma *local_got_refcounts;
4944
4945 /* This is a global offset table entry for a local symbol. */
4946 local_got_refcounts = elf_local_got_refcounts (abfd);
4947 if (local_got_refcounts == NULL)
4948 {
4949 bfd_size_type size;
4950
4951 size = symtab_hdr->sh_info;
4952 size *= (sizeof (bfd_signed_vma) + sizeof(char));
4953 local_got_refcounts = bfd_zalloc (abfd, size);
4954 if (local_got_refcounts == NULL)
4955 return FALSE;
4956 elf_local_got_refcounts (abfd) = local_got_refcounts;
4957 elf32_arm_local_got_tls_type (abfd)
4958 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4959 }
4960 local_got_refcounts[r_symndx] += 1;
4961 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
4962 }
4963
4964 /* We will already have issued an error message if there is a
4965 TLS / non-TLS mismatch, based on the symbol type. We don't
4966 support any linker relaxations. So just combine any TLS
4967 types needed. */
4968 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4969 && tls_type != GOT_NORMAL)
4970 tls_type |= old_tls_type;
4971
4972 if (old_tls_type != tls_type)
4973 {
4974 if (h != NULL)
4975 elf32_arm_hash_entry (h)->tls_type = tls_type;
4976 else
4977 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
4978 }
4979 }
4980 /* Fall through */
4981
4982 case R_ARM_TLS_LDM32:
4983 if (r_type == R_ARM_TLS_LDM32)
4984 htab->tls_ldm_got.refcount++;
4985 /* Fall through */
4986
4987 case R_ARM_GOTOFF32:
4988 case R_ARM_GOTPC:
4989 if (htab->sgot == NULL)
4990 {
4991 if (htab->root.dynobj == NULL)
4992 htab->root.dynobj = abfd;
4993 if (!create_got_section (htab->root.dynobj, info))
4994 return FALSE;
4995 }
4996 break;
4997
4998 case R_ARM_ABS32:
4999 case R_ARM_REL32:
5000 case R_ARM_PC24:
5001 case R_ARM_PLT32:
5002 case R_ARM_CALL:
5003 case R_ARM_JUMP24:
5004 case R_ARM_PREL31:
5005 case R_ARM_THM_CALL:
5006 /* Should the interworking branches be listed here? */
5007 if (h != NULL)
5008 {
5009 /* If this reloc is in a read-only section, we might
5010 need a copy reloc. We can't check reliably at this
5011 stage whether the section is read-only, as input
5012 sections have not yet been mapped to output sections.
5013 Tentatively set the flag for now, and correct in
5014 adjust_dynamic_symbol. */
5015 if (!info->shared)
5016 h->non_got_ref = 1;
5017
5018 /* We may need a .plt entry if the function this reloc
5019 refers to is in a different object. We can't tell for
5020 sure yet, because something later might force the
5021 symbol local. */
5022 if (r_type == R_ARM_PC24
5023 || r_type == R_ARM_CALL
5024 || r_type == R_ARM_JUMP24
5025 || r_type == R_ARM_PREL31
5026 || r_type == R_ARM_PLT32
5027 || r_type == R_ARM_THM_CALL)
5028 h->needs_plt = 1;
5029
5030 /* If we create a PLT entry, this relocation will reference
5031 it, even if it's an ABS32 relocation. */
5032 h->plt.refcount += 1;
5033
5034 if (r_type == R_ARM_THM_CALL)
5035 eh->plt_thumb_refcount += 1;
5036 }
5037
5038 /* If we are creating a shared library or relocatable executable,
5039 and this is a reloc against a global symbol, or a non PC
5040 relative reloc against a local symbol, then we need to copy
5041 the reloc into the shared library. However, if we are linking
5042 with -Bsymbolic, we do not need to copy a reloc against a
5043 global symbol which is defined in an object we are
5044 including in the link (i.e., DEF_REGULAR is set). At
5045 this point we have not seen all the input files, so it is
5046 possible that DEF_REGULAR is not set now but will be set
5047 later (it is never cleared). We account for that
5048 possibility below by storing information in the
5049 relocs_copied field of the hash table entry. */
5050 if ((info->shared || htab->root.is_relocatable_executable)
5051 && (sec->flags & SEC_ALLOC) != 0
5052 && (r_type == R_ARM_ABS32
5053 || (h != NULL && ! h->needs_plt
5054 && (! info->symbolic || ! h->def_regular))))
5055 {
5056 struct elf32_arm_relocs_copied *p, **head;
5057
5058 /* When creating a shared object, we must copy these
5059 reloc types into the output file. We create a reloc
5060 section in dynobj and make room for this reloc. */
5061 if (sreloc == NULL)
5062 {
5063 const char * name;
5064
5065 name = (bfd_elf_string_from_elf_section
5066 (abfd,
5067 elf_elfheader (abfd)->e_shstrndx,
5068 elf_section_data (sec)->rel_hdr.sh_name));
5069 if (name == NULL)
5070 return FALSE;
5071
5072 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
5073 && strcmp (bfd_get_section_name (abfd, sec),
5074 name + 4) == 0);
5075
5076 sreloc = bfd_get_section_by_name (dynobj, name);
5077 if (sreloc == NULL)
5078 {
5079 flagword flags;
5080
5081 flags = (SEC_HAS_CONTENTS | SEC_READONLY
5082 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5083 if ((sec->flags & SEC_ALLOC) != 0
5084 /* BPABI objects never have dynamic
5085 relocations mapped. */
5086 && !htab->symbian_p)
5087 flags |= SEC_ALLOC | SEC_LOAD;
5088 sreloc = bfd_make_section_with_flags (dynobj,
5089 name,
5090 flags);
5091 if (sreloc == NULL
5092 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
5093 return FALSE;
5094 }
5095
5096 elf_section_data (sec)->sreloc = sreloc;
5097 }
5098
5099 /* If this is a global symbol, we count the number of
5100 relocations we need for this symbol. */
5101 if (h != NULL)
5102 {
5103 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
5104 }
5105 else
5106 {
5107 /* Track dynamic relocs needed for local syms too.
5108 We really need local syms available to do this
5109 easily. Oh well. */
5110
5111 asection *s;
5112 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
5113 sec, r_symndx);
5114 if (s == NULL)
5115 return FALSE;
5116
5117 head = ((struct elf32_arm_relocs_copied **)
5118 &elf_section_data (s)->local_dynrel);
5119 }
5120
5121 p = *head;
5122 if (p == NULL || p->section != sec)
5123 {
5124 bfd_size_type amt = sizeof *p;
5125
5126 p = bfd_alloc (htab->root.dynobj, amt);
5127 if (p == NULL)
5128 return FALSE;
5129 p->next = *head;
5130 *head = p;
5131 p->section = sec;
5132 p->count = 0;
5133 p->pc_count = 0;
5134 }
5135
5136 if (r_type == R_ARM_REL32)
5137 p->pc_count += 1;
5138 p->count += 1;
5139 }
5140 break;
5141
5142 /* This relocation describes the C++ object vtable hierarchy.
5143 Reconstruct it for later use during GC. */
5144 case R_ARM_GNU_VTINHERIT:
5145 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5146 return FALSE;
5147 break;
5148
5149 /* This relocation describes which C++ vtable entries are actually
5150 used. Record for later use during GC. */
5151 case R_ARM_GNU_VTENTRY:
5152 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
5153 return FALSE;
5154 break;
5155 }
5156 }
5157
5158 return TRUE;
5159 }
5160
5161 /* Treat mapping symbols as special target symbols. */
5162
5163 static bfd_boolean
5164 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
5165 {
5166 return bfd_is_arm_mapping_symbol_name (sym->name);
5167 }
5168
5169 /* This is a copy of elf_find_function() from elf.c except that
5170 ARM mapping symbols are ignored when looking for function names
5171 and STT_ARM_TFUNC is considered to a function type. */
5172
5173 static bfd_boolean
5174 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
5175 asection * section,
5176 asymbol ** symbols,
5177 bfd_vma offset,
5178 const char ** filename_ptr,
5179 const char ** functionname_ptr)
5180 {
5181 const char * filename = NULL;
5182 asymbol * func = NULL;
5183 bfd_vma low_func = 0;
5184 asymbol ** p;
5185
5186 for (p = symbols; *p != NULL; p++)
5187 {
5188 elf_symbol_type *q;
5189
5190 q = (elf_symbol_type *) *p;
5191
5192 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
5193 {
5194 default:
5195 break;
5196 case STT_FILE:
5197 filename = bfd_asymbol_name (&q->symbol);
5198 break;
5199 case STT_FUNC:
5200 case STT_ARM_TFUNC:
5201 case STT_NOTYPE:
5202 /* Skip $a and $t symbols. */
5203 if ((q->symbol.flags & BSF_LOCAL)
5204 && bfd_is_arm_mapping_symbol_name (q->symbol.name))
5205 continue;
5206 /* Fall through. */
5207 if (bfd_get_section (&q->symbol) == section
5208 && q->symbol.value >= low_func
5209 && q->symbol.value <= offset)
5210 {
5211 func = (asymbol *) q;
5212 low_func = q->symbol.value;
5213 }
5214 break;
5215 }
5216 }
5217
5218 if (func == NULL)
5219 return FALSE;
5220
5221 if (filename_ptr)
5222 *filename_ptr = filename;
5223 if (functionname_ptr)
5224 *functionname_ptr = bfd_asymbol_name (func);
5225
5226 return TRUE;
5227 }
5228
5229
5230 /* Find the nearest line to a particular section and offset, for error
5231 reporting. This code is a duplicate of the code in elf.c, except
5232 that it uses arm_elf_find_function. */
5233
5234 static bfd_boolean
5235 elf32_arm_find_nearest_line (bfd * abfd,
5236 asection * section,
5237 asymbol ** symbols,
5238 bfd_vma offset,
5239 const char ** filename_ptr,
5240 const char ** functionname_ptr,
5241 unsigned int * line_ptr)
5242 {
5243 bfd_boolean found = FALSE;
5244
5245 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
5246
5247 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
5248 filename_ptr, functionname_ptr,
5249 line_ptr, 0,
5250 & elf_tdata (abfd)->dwarf2_find_line_info))
5251 {
5252 if (!*functionname_ptr)
5253 arm_elf_find_function (abfd, section, symbols, offset,
5254 *filename_ptr ? NULL : filename_ptr,
5255 functionname_ptr);
5256
5257 return TRUE;
5258 }
5259
5260 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
5261 & found, filename_ptr,
5262 functionname_ptr, line_ptr,
5263 & elf_tdata (abfd)->line_info))
5264 return FALSE;
5265
5266 if (found && (*functionname_ptr || *line_ptr))
5267 return TRUE;
5268
5269 if (symbols == NULL)
5270 return FALSE;
5271
5272 if (! arm_elf_find_function (abfd, section, symbols, offset,
5273 filename_ptr, functionname_ptr))
5274 return FALSE;
5275
5276 *line_ptr = 0;
5277 return TRUE;
5278 }
5279
5280 static bfd_boolean
5281 elf32_arm_find_inliner_info (bfd * abfd,
5282 const char ** filename_ptr,
5283 const char ** functionname_ptr,
5284 unsigned int * line_ptr)
5285 {
5286 bfd_boolean found;
5287 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
5288 functionname_ptr, line_ptr,
5289 & elf_tdata (abfd)->dwarf2_find_line_info);
5290 return found;
5291 }
5292
5293 /* Adjust a symbol defined by a dynamic object and referenced by a
5294 regular object. The current definition is in some section of the
5295 dynamic object, but we're not including those sections. We have to
5296 change the definition to something the rest of the link can
5297 understand. */
5298
5299 static bfd_boolean
5300 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
5301 struct elf_link_hash_entry * h)
5302 {
5303 bfd * dynobj;
5304 asection * s;
5305 unsigned int power_of_two;
5306 struct elf32_arm_link_hash_entry * eh;
5307 struct elf32_arm_link_hash_table *globals;
5308
5309 globals = elf32_arm_hash_table (info);
5310 dynobj = elf_hash_table (info)->dynobj;
5311
5312 /* Make sure we know what is going on here. */
5313 BFD_ASSERT (dynobj != NULL
5314 && (h->needs_plt
5315 || h->u.weakdef != NULL
5316 || (h->def_dynamic
5317 && h->ref_regular
5318 && !h->def_regular)));
5319
5320 eh = (struct elf32_arm_link_hash_entry *) h;
5321
5322 /* If this is a function, put it in the procedure linkage table. We
5323 will fill in the contents of the procedure linkage table later,
5324 when we know the address of the .got section. */
5325 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
5326 || h->needs_plt)
5327 {
5328 if (h->plt.refcount <= 0
5329 || SYMBOL_CALLS_LOCAL (info, h)
5330 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5331 && h->root.type == bfd_link_hash_undefweak))
5332 {
5333 /* This case can occur if we saw a PLT32 reloc in an input
5334 file, but the symbol was never referred to by a dynamic
5335 object, or if all references were garbage collected. In
5336 such a case, we don't actually need to build a procedure
5337 linkage table, and we can just do a PC24 reloc instead. */
5338 h->plt.offset = (bfd_vma) -1;
5339 eh->plt_thumb_refcount = 0;
5340 h->needs_plt = 0;
5341 }
5342
5343 return TRUE;
5344 }
5345 else
5346 {
5347 /* It's possible that we incorrectly decided a .plt reloc was
5348 needed for an R_ARM_PC24 or similar reloc to a non-function sym
5349 in check_relocs. We can't decide accurately between function
5350 and non-function syms in check-relocs; Objects loaded later in
5351 the link may change h->type. So fix it now. */
5352 h->plt.offset = (bfd_vma) -1;
5353 eh->plt_thumb_refcount = 0;
5354 }
5355
5356 /* If this is a weak symbol, and there is a real definition, the
5357 processor independent code will have arranged for us to see the
5358 real definition first, and we can just use the same value. */
5359 if (h->u.weakdef != NULL)
5360 {
5361 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5362 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5363 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5364 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5365 return TRUE;
5366 }
5367
5368 /* If there are no non-GOT references, we do not need a copy
5369 relocation. */
5370 if (!h->non_got_ref)
5371 return TRUE;
5372
5373 /* This is a reference to a symbol defined by a dynamic object which
5374 is not a function. */
5375
5376 /* If we are creating a shared library, we must presume that the
5377 only references to the symbol are via the global offset table.
5378 For such cases we need not do anything here; the relocations will
5379 be handled correctly by relocate_section. Relocatable executables
5380 can reference data in shared objects directly, so we don't need to
5381 do anything here. */
5382 if (info->shared || globals->root.is_relocatable_executable)
5383 return TRUE;
5384
5385 /* We must allocate the symbol in our .dynbss section, which will
5386 become part of the .bss section of the executable. There will be
5387 an entry for this symbol in the .dynsym section. The dynamic
5388 object will contain position independent code, so all references
5389 from the dynamic object to this symbol will go through the global
5390 offset table. The dynamic linker will use the .dynsym entry to
5391 determine the address it must put in the global offset table, so
5392 both the dynamic object and the regular object will refer to the
5393 same memory location for the variable. */
5394 s = bfd_get_section_by_name (dynobj, ".dynbss");
5395 BFD_ASSERT (s != NULL);
5396
5397 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
5398 copy the initial value out of the dynamic object and into the
5399 runtime process image. We need to remember the offset into the
5400 .rel.bss section we are going to use. */
5401 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5402 {
5403 asection *srel;
5404
5405 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
5406 BFD_ASSERT (srel != NULL);
5407 srel->size += sizeof (Elf32_External_Rel);
5408 h->needs_copy = 1;
5409 }
5410
5411 /* We need to figure out the alignment required for this symbol. I
5412 have no idea how ELF linkers handle this. */
5413 power_of_two = bfd_log2 (h->size);
5414 if (power_of_two > 3)
5415 power_of_two = 3;
5416
5417 /* Apply the required alignment. */
5418 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5419 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5420 {
5421 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
5422 return FALSE;
5423 }
5424
5425 /* Define the symbol as being at this point in the section. */
5426 h->root.u.def.section = s;
5427 h->root.u.def.value = s->size;
5428
5429 /* Increment the section size to make room for the symbol. */
5430 s->size += h->size;
5431
5432 return TRUE;
5433 }
5434
5435 /* Allocate space in .plt, .got and associated reloc sections for
5436 dynamic relocs. */
5437
5438 static bfd_boolean
5439 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
5440 {
5441 struct bfd_link_info *info;
5442 struct elf32_arm_link_hash_table *htab;
5443 struct elf32_arm_link_hash_entry *eh;
5444 struct elf32_arm_relocs_copied *p;
5445
5446 eh = (struct elf32_arm_link_hash_entry *) h;
5447
5448 if (h->root.type == bfd_link_hash_indirect)
5449 return TRUE;
5450
5451 if (h->root.type == bfd_link_hash_warning)
5452 /* When warning symbols are created, they **replace** the "real"
5453 entry in the hash table, thus we never get to see the real
5454 symbol in a hash traversal. So look at it now. */
5455 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5456
5457 info = (struct bfd_link_info *) inf;
5458 htab = elf32_arm_hash_table (info);
5459
5460 if (htab->root.dynamic_sections_created
5461 && h->plt.refcount > 0)
5462 {
5463 /* Make sure this symbol is output as a dynamic symbol.
5464 Undefined weak syms won't yet be marked as dynamic. */
5465 if (h->dynindx == -1
5466 && !h->forced_local)
5467 {
5468 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5469 return FALSE;
5470 }
5471
5472 if (info->shared
5473 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5474 {
5475 asection *s = htab->splt;
5476
5477 /* If this is the first .plt entry, make room for the special
5478 first entry. */
5479 if (s->size == 0)
5480 s->size += htab->plt_header_size;
5481
5482 h->plt.offset = s->size;
5483
5484 /* If we will insert a Thumb trampoline before this PLT, leave room
5485 for it. */
5486 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
5487 {
5488 h->plt.offset += PLT_THUMB_STUB_SIZE;
5489 s->size += PLT_THUMB_STUB_SIZE;
5490 }
5491
5492 /* If this symbol is not defined in a regular file, and we are
5493 not generating a shared library, then set the symbol to this
5494 location in the .plt. This is required to make function
5495 pointers compare as equal between the normal executable and
5496 the shared library. */
5497 if (! info->shared
5498 && !h->def_regular)
5499 {
5500 h->root.u.def.section = s;
5501 h->root.u.def.value = h->plt.offset;
5502
5503 /* Make sure the function is not marked as Thumb, in case
5504 it is the target of an ABS32 relocation, which will
5505 point to the PLT entry. */
5506 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
5507 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
5508 }
5509
5510 /* Make room for this entry. */
5511 s->size += htab->plt_entry_size;
5512
5513 if (!htab->symbian_p)
5514 {
5515 /* We also need to make an entry in the .got.plt section, which
5516 will be placed in the .got section by the linker script. */
5517 eh->plt_got_offset = htab->sgotplt->size;
5518 htab->sgotplt->size += 4;
5519 }
5520
5521 /* We also need to make an entry in the .rel.plt section. */
5522 htab->srelplt->size += sizeof (Elf32_External_Rel);
5523 }
5524 else
5525 {
5526 h->plt.offset = (bfd_vma) -1;
5527 h->needs_plt = 0;
5528 }
5529 }
5530 else
5531 {
5532 h->plt.offset = (bfd_vma) -1;
5533 h->needs_plt = 0;
5534 }
5535
5536 if (h->got.refcount > 0)
5537 {
5538 asection *s;
5539 bfd_boolean dyn;
5540 int tls_type = elf32_arm_hash_entry (h)->tls_type;
5541 int indx;
5542
5543 /* Make sure this symbol is output as a dynamic symbol.
5544 Undefined weak syms won't yet be marked as dynamic. */
5545 if (h->dynindx == -1
5546 && !h->forced_local)
5547 {
5548 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5549 return FALSE;
5550 }
5551
5552 if (!htab->symbian_p)
5553 {
5554 s = htab->sgot;
5555 h->got.offset = s->size;
5556
5557 if (tls_type == GOT_UNKNOWN)
5558 abort ();
5559
5560 if (tls_type == GOT_NORMAL)
5561 /* Non-TLS symbols need one GOT slot. */
5562 s->size += 4;
5563 else
5564 {
5565 if (tls_type & GOT_TLS_GD)
5566 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
5567 s->size += 8;
5568 if (tls_type & GOT_TLS_IE)
5569 /* R_ARM_TLS_IE32 needs one GOT slot. */
5570 s->size += 4;
5571 }
5572
5573 dyn = htab->root.dynamic_sections_created;
5574
5575 indx = 0;
5576 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5577 && (!info->shared
5578 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5579 indx = h->dynindx;
5580
5581 if (tls_type != GOT_NORMAL
5582 && (info->shared || indx != 0)
5583 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5584 || h->root.type != bfd_link_hash_undefweak))
5585 {
5586 if (tls_type & GOT_TLS_IE)
5587 htab->srelgot->size += sizeof (Elf32_External_Rel);
5588
5589 if (tls_type & GOT_TLS_GD)
5590 htab->srelgot->size += sizeof (Elf32_External_Rel);
5591
5592 if ((tls_type & GOT_TLS_GD) && indx != 0)
5593 htab->srelgot->size += sizeof (Elf32_External_Rel);
5594 }
5595 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5596 || h->root.type != bfd_link_hash_undefweak)
5597 && (info->shared
5598 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5599 htab->srelgot->size += sizeof (Elf32_External_Rel);
5600 }
5601 }
5602 else
5603 h->got.offset = (bfd_vma) -1;
5604
5605 if (eh->relocs_copied == NULL)
5606 return TRUE;
5607
5608 /* In the shared -Bsymbolic case, discard space allocated for
5609 dynamic pc-relative relocs against symbols which turn out to be
5610 defined in regular objects. For the normal shared case, discard
5611 space for pc-relative relocs that have become local due to symbol
5612 visibility changes. */
5613
5614 if (info->shared || htab->root.is_relocatable_executable)
5615 {
5616 /* The only reloc that uses pc_count is R_ARM_REL32, which will
5617 appear on something like ".long foo - .". We want calls to
5618 protected symbols to resolve directly to the function rather
5619 than going via the plt. If people want function pointer
5620 comparisons to work as expected then they should avoid
5621 writing assembly like ".long foo - .". */
5622 if (SYMBOL_CALLS_LOCAL (info, h))
5623 {
5624 struct elf32_arm_relocs_copied **pp;
5625
5626 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
5627 {
5628 p->count -= p->pc_count;
5629 p->pc_count = 0;
5630 if (p->count == 0)
5631 *pp = p->next;
5632 else
5633 pp = &p->next;
5634 }
5635 }
5636
5637 /* Also discard relocs on undefined weak syms with non-default
5638 visibility. */
5639 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5640 && h->root.type == bfd_link_hash_undefweak)
5641 eh->relocs_copied = NULL;
5642 else if (htab->root.is_relocatable_executable && h->dynindx == -1
5643 && h->root.type == bfd_link_hash_new)
5644 {
5645 /* Output absolute symbols so that we can create relocations
5646 against them. For normal symbols we output a relocation
5647 against the section that contains them. */
5648 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5649 return FALSE;
5650 }
5651
5652 }
5653 else
5654 {
5655 /* For the non-shared case, discard space for relocs against
5656 symbols which turn out to need copy relocs or are not
5657 dynamic. */
5658
5659 if (!h->non_got_ref
5660 && ((h->def_dynamic
5661 && !h->def_regular)
5662 || (htab->root.dynamic_sections_created
5663 && (h->root.type == bfd_link_hash_undefweak
5664 || h->root.type == bfd_link_hash_undefined))))
5665 {
5666 /* Make sure this symbol is output as a dynamic symbol.
5667 Undefined weak syms won't yet be marked as dynamic. */
5668 if (h->dynindx == -1
5669 && !h->forced_local)
5670 {
5671 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5672 return FALSE;
5673 }
5674
5675 /* If that succeeded, we know we'll be keeping all the
5676 relocs. */
5677 if (h->dynindx != -1)
5678 goto keep;
5679 }
5680
5681 eh->relocs_copied = NULL;
5682
5683 keep: ;
5684 }
5685
5686 /* Finally, allocate space. */
5687 for (p = eh->relocs_copied; p != NULL; p = p->next)
5688 {
5689 asection *sreloc = elf_section_data (p->section)->sreloc;
5690 sreloc->size += p->count * sizeof (Elf32_External_Rel);
5691 }
5692
5693 return TRUE;
5694 }
5695
5696 /* Find any dynamic relocs that apply to read-only sections. */
5697
5698 static bfd_boolean
5699 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5700 {
5701 struct elf32_arm_link_hash_entry *eh;
5702 struct elf32_arm_relocs_copied *p;
5703
5704 if (h->root.type == bfd_link_hash_warning)
5705 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5706
5707 eh = (struct elf32_arm_link_hash_entry *) h;
5708 for (p = eh->relocs_copied; p != NULL; p = p->next)
5709 {
5710 asection *s = p->section;
5711
5712 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5713 {
5714 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5715
5716 info->flags |= DF_TEXTREL;
5717
5718 /* Not an error, just cut short the traversal. */
5719 return FALSE;
5720 }
5721 }
5722 return TRUE;
5723 }
5724
5725 /* Set the sizes of the dynamic sections. */
5726
5727 static bfd_boolean
5728 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5729 struct bfd_link_info * info)
5730 {
5731 bfd * dynobj;
5732 asection * s;
5733 bfd_boolean plt;
5734 bfd_boolean relocs;
5735 bfd *ibfd;
5736 struct elf32_arm_link_hash_table *htab;
5737
5738 htab = elf32_arm_hash_table (info);
5739 dynobj = elf_hash_table (info)->dynobj;
5740 BFD_ASSERT (dynobj != NULL);
5741
5742 if (elf_hash_table (info)->dynamic_sections_created)
5743 {
5744 /* Set the contents of the .interp section to the interpreter. */
5745 if (info->executable)
5746 {
5747 s = bfd_get_section_by_name (dynobj, ".interp");
5748 BFD_ASSERT (s != NULL);
5749 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5750 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5751 }
5752 }
5753
5754 /* Set up .got offsets for local syms, and space for local dynamic
5755 relocs. */
5756 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5757 {
5758 bfd_signed_vma *local_got;
5759 bfd_signed_vma *end_local_got;
5760 char *local_tls_type;
5761 bfd_size_type locsymcount;
5762 Elf_Internal_Shdr *symtab_hdr;
5763 asection *srel;
5764
5765 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5766 continue;
5767
5768 for (s = ibfd->sections; s != NULL; s = s->next)
5769 {
5770 struct elf32_arm_relocs_copied *p;
5771
5772 for (p = *((struct elf32_arm_relocs_copied **)
5773 &elf_section_data (s)->local_dynrel);
5774 p != NULL;
5775 p = p->next)
5776 {
5777 if (!bfd_is_abs_section (p->section)
5778 && bfd_is_abs_section (p->section->output_section))
5779 {
5780 /* Input section has been discarded, either because
5781 it is a copy of a linkonce section or due to
5782 linker script /DISCARD/, so we'll be discarding
5783 the relocs too. */
5784 }
5785 else if (p->count != 0)
5786 {
5787 srel = elf_section_data (p->section)->sreloc;
5788 srel->size += p->count * sizeof (Elf32_External_Rel);
5789 if ((p->section->output_section->flags & SEC_READONLY) != 0)
5790 info->flags |= DF_TEXTREL;
5791 }
5792 }
5793 }
5794
5795 local_got = elf_local_got_refcounts (ibfd);
5796 if (!local_got)
5797 continue;
5798
5799 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5800 locsymcount = symtab_hdr->sh_info;
5801 end_local_got = local_got + locsymcount;
5802 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
5803 s = htab->sgot;
5804 srel = htab->srelgot;
5805 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5806 {
5807 if (*local_got > 0)
5808 {
5809 *local_got = s->size;
5810 if (*local_tls_type & GOT_TLS_GD)
5811 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5812 s->size += 8;
5813 if (*local_tls_type & GOT_TLS_IE)
5814 s->size += 4;
5815 if (*local_tls_type == GOT_NORMAL)
5816 s->size += 4;
5817
5818 if (info->shared || *local_tls_type == GOT_TLS_GD)
5819 srel->size += sizeof (Elf32_External_Rel);
5820 }
5821 else
5822 *local_got = (bfd_vma) -1;
5823 }
5824 }
5825
5826 if (htab->tls_ldm_got.refcount > 0)
5827 {
5828 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5829 for R_ARM_TLS_LDM32 relocations. */
5830 htab->tls_ldm_got.offset = htab->sgot->size;
5831 htab->sgot->size += 8;
5832 if (info->shared)
5833 htab->srelgot->size += sizeof (Elf32_External_Rel);
5834 }
5835 else
5836 htab->tls_ldm_got.offset = -1;
5837
5838 /* Allocate global sym .plt and .got entries, and space for global
5839 sym dynamic relocs. */
5840 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5841
5842 /* The check_relocs and adjust_dynamic_symbol entry points have
5843 determined the sizes of the various dynamic sections. Allocate
5844 memory for them. */
5845 plt = FALSE;
5846 relocs = FALSE;
5847 for (s = dynobj->sections; s != NULL; s = s->next)
5848 {
5849 const char * name;
5850 bfd_boolean strip;
5851
5852 if ((s->flags & SEC_LINKER_CREATED) == 0)
5853 continue;
5854
5855 /* It's OK to base decisions on the section name, because none
5856 of the dynobj section names depend upon the input files. */
5857 name = bfd_get_section_name (dynobj, s);
5858
5859 strip = FALSE;
5860
5861 if (strcmp (name, ".plt") == 0)
5862 {
5863 if (s->size == 0)
5864 {
5865 /* Strip this section if we don't need it; see the
5866 comment below. */
5867 strip = TRUE;
5868 }
5869 else
5870 {
5871 /* Remember whether there is a PLT. */
5872 plt = TRUE;
5873 }
5874 }
5875 else if (strncmp (name, ".rel", 4) == 0)
5876 {
5877 if (s->size == 0)
5878 {
5879 /* If we don't need this section, strip it from the
5880 output file. This is mostly to handle .rel.bss and
5881 .rel.plt. We must create both sections in
5882 create_dynamic_sections, because they must be created
5883 before the linker maps input sections to output
5884 sections. The linker does that before
5885 adjust_dynamic_symbol is called, and it is that
5886 function which decides whether anything needs to go
5887 into these sections. */
5888 strip = TRUE;
5889 }
5890 else
5891 {
5892 /* Remember whether there are any reloc sections other
5893 than .rel.plt. */
5894 if (strcmp (name, ".rel.plt") != 0)
5895 relocs = TRUE;
5896
5897 /* We use the reloc_count field as a counter if we need
5898 to copy relocs into the output file. */
5899 s->reloc_count = 0;
5900 }
5901 }
5902 else if (strncmp (name, ".got", 4) != 0)
5903 {
5904 /* It's not one of our sections, so don't allocate space. */
5905 continue;
5906 }
5907
5908 if (strip)
5909 {
5910 s->flags |= SEC_EXCLUDE;
5911 continue;
5912 }
5913
5914 /* Allocate memory for the section contents. */
5915 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5916 if (s->contents == NULL && s->size != 0)
5917 return FALSE;
5918 }
5919
5920 if (elf_hash_table (info)->dynamic_sections_created)
5921 {
5922 /* Add some entries to the .dynamic section. We fill in the
5923 values later, in elf32_arm_finish_dynamic_sections, but we
5924 must add the entries now so that we get the correct size for
5925 the .dynamic section. The DT_DEBUG entry is filled in by the
5926 dynamic linker and used by the debugger. */
5927 #define add_dynamic_entry(TAG, VAL) \
5928 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5929
5930 if (!info->shared)
5931 {
5932 if (!add_dynamic_entry (DT_DEBUG, 0))
5933 return FALSE;
5934 }
5935
5936 if (plt)
5937 {
5938 if ( !add_dynamic_entry (DT_PLTGOT, 0)
5939 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5940 || !add_dynamic_entry (DT_PLTREL, DT_REL)
5941 || !add_dynamic_entry (DT_JMPREL, 0))
5942 return FALSE;
5943 }
5944
5945 if (relocs)
5946 {
5947 if ( !add_dynamic_entry (DT_REL, 0)
5948 || !add_dynamic_entry (DT_RELSZ, 0)
5949 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
5950 return FALSE;
5951 }
5952
5953 /* If any dynamic relocs apply to a read-only section,
5954 then we need a DT_TEXTREL entry. */
5955 if ((info->flags & DF_TEXTREL) == 0)
5956 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
5957 (PTR) info);
5958
5959 if ((info->flags & DF_TEXTREL) != 0)
5960 {
5961 if (!add_dynamic_entry (DT_TEXTREL, 0))
5962 return FALSE;
5963 info->flags |= DF_TEXTREL;
5964 }
5965 }
5966 #undef add_synamic_entry
5967
5968 return TRUE;
5969 }
5970
5971 /* Finish up dynamic symbol handling. We set the contents of various
5972 dynamic sections here. */
5973
5974 static bfd_boolean
5975 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
5976 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
5977 {
5978 bfd * dynobj;
5979 struct elf32_arm_link_hash_table *htab;
5980 struct elf32_arm_link_hash_entry *eh;
5981
5982 dynobj = elf_hash_table (info)->dynobj;
5983 htab = elf32_arm_hash_table (info);
5984 eh = (struct elf32_arm_link_hash_entry *) h;
5985
5986 if (h->plt.offset != (bfd_vma) -1)
5987 {
5988 asection * splt;
5989 asection * srel;
5990 bfd_byte *loc;
5991 bfd_vma plt_index;
5992 Elf_Internal_Rela rel;
5993
5994 /* This symbol has an entry in the procedure linkage table. Set
5995 it up. */
5996
5997 BFD_ASSERT (h->dynindx != -1);
5998
5999 splt = bfd_get_section_by_name (dynobj, ".plt");
6000 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
6001 BFD_ASSERT (splt != NULL && srel != NULL);
6002
6003 /* Fill in the entry in the procedure linkage table. */
6004 if (htab->symbian_p)
6005 {
6006 unsigned i;
6007 for (i = 0; i < htab->plt_entry_size / 4; ++i)
6008 bfd_put_32 (output_bfd,
6009 elf32_arm_symbian_plt_entry[i],
6010 splt->contents + h->plt.offset + 4 * i);
6011
6012 /* Fill in the entry in the .rel.plt section. */
6013 rel.r_offset = (splt->output_section->vma
6014 + splt->output_offset
6015 + h->plt.offset + 4 * (i - 1));
6016 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
6017
6018 /* Get the index in the procedure linkage table which
6019 corresponds to this symbol. This is the index of this symbol
6020 in all the symbols for which we are making plt entries. The
6021 first entry in the procedure linkage table is reserved. */
6022 plt_index = ((h->plt.offset - htab->plt_header_size)
6023 / htab->plt_entry_size);
6024 }
6025 else
6026 {
6027 bfd_vma got_offset;
6028 bfd_vma got_displacement;
6029 asection * sgot;
6030
6031 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
6032 BFD_ASSERT (sgot != NULL);
6033
6034 /* Get the offset into the .got.plt table of the entry that
6035 corresponds to this function. */
6036 got_offset = eh->plt_got_offset;
6037
6038 /* Get the index in the procedure linkage table which
6039 corresponds to this symbol. This is the index of this symbol
6040 in all the symbols for which we are making plt entries. The
6041 first three entries in .got.plt are reserved; after that
6042 symbols appear in the same order as in .plt. */
6043 plt_index = (got_offset - 12) / 4;
6044
6045 /* Calculate the displacement between the PLT slot and the
6046 entry in the GOT. The eight-byte offset accounts for the
6047 value produced by adding to pc in the first instruction
6048 of the PLT stub. */
6049 got_displacement = (sgot->output_section->vma
6050 + sgot->output_offset
6051 + got_offset
6052 - splt->output_section->vma
6053 - splt->output_offset
6054 - h->plt.offset
6055 - 8);
6056
6057 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
6058
6059 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
6060 {
6061 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
6062 splt->contents + h->plt.offset - 4);
6063 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
6064 splt->contents + h->plt.offset - 2);
6065 }
6066
6067 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
6068 splt->contents + h->plt.offset + 0);
6069 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
6070 splt->contents + h->plt.offset + 4);
6071 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
6072 splt->contents + h->plt.offset + 8);
6073 #ifdef FOUR_WORD_PLT
6074 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
6075 splt->contents + h->plt.offset + 12);
6076 #endif
6077
6078 /* Fill in the entry in the global offset table. */
6079 bfd_put_32 (output_bfd,
6080 (splt->output_section->vma
6081 + splt->output_offset),
6082 sgot->contents + got_offset);
6083
6084 /* Fill in the entry in the .rel.plt section. */
6085 rel.r_offset = (sgot->output_section->vma
6086 + sgot->output_offset
6087 + got_offset);
6088 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
6089 }
6090
6091 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
6092 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6093
6094 if (!h->def_regular)
6095 {
6096 /* Mark the symbol as undefined, rather than as defined in
6097 the .plt section. Leave the value alone. */
6098 sym->st_shndx = SHN_UNDEF;
6099 /* If the symbol is weak, we do need to clear the value.
6100 Otherwise, the PLT entry would provide a definition for
6101 the symbol even if the symbol wasn't defined anywhere,
6102 and so the symbol would never be NULL. */
6103 if (!h->ref_regular_nonweak)
6104 sym->st_value = 0;
6105 }
6106 }
6107
6108 if (h->got.offset != (bfd_vma) -1
6109 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
6110 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
6111 {
6112 asection * sgot;
6113 asection * srel;
6114 Elf_Internal_Rela rel;
6115 bfd_byte *loc;
6116
6117 /* This symbol has an entry in the global offset table. Set it
6118 up. */
6119 sgot = bfd_get_section_by_name (dynobj, ".got");
6120 srel = bfd_get_section_by_name (dynobj, ".rel.got");
6121 BFD_ASSERT (sgot != NULL && srel != NULL);
6122
6123 rel.r_offset = (sgot->output_section->vma
6124 + sgot->output_offset
6125 + (h->got.offset &~ (bfd_vma) 1));
6126
6127 /* If this is a static link, or it is a -Bsymbolic link and the
6128 symbol is defined locally or was forced to be local because
6129 of a version file, we just want to emit a RELATIVE reloc.
6130 The entry in the global offset table will already have been
6131 initialized in the relocate_section function. */
6132 if (info->shared
6133 && SYMBOL_REFERENCES_LOCAL (info, h))
6134 {
6135 BFD_ASSERT((h->got.offset & 1) != 0);
6136 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
6137 }
6138 else
6139 {
6140 BFD_ASSERT((h->got.offset & 1) == 0);
6141 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
6142 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
6143 }
6144
6145 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
6146 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6147 }
6148
6149 if (h->needs_copy)
6150 {
6151 asection * s;
6152 Elf_Internal_Rela rel;
6153 bfd_byte *loc;
6154
6155 /* This symbol needs a copy reloc. Set it up. */
6156 BFD_ASSERT (h->dynindx != -1
6157 && (h->root.type == bfd_link_hash_defined
6158 || h->root.type == bfd_link_hash_defweak));
6159
6160 s = bfd_get_section_by_name (h->root.u.def.section->owner,
6161 ".rel.bss");
6162 BFD_ASSERT (s != NULL);
6163
6164 rel.r_offset = (h->root.u.def.value
6165 + h->root.u.def.section->output_section->vma
6166 + h->root.u.def.section->output_offset);
6167 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
6168 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
6169 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6170 }
6171
6172 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
6173 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
6174 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
6175 sym->st_shndx = SHN_ABS;
6176
6177 return TRUE;
6178 }
6179
6180 /* Finish up the dynamic sections. */
6181
6182 static bfd_boolean
6183 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
6184 {
6185 bfd * dynobj;
6186 asection * sgot;
6187 asection * sdyn;
6188
6189 dynobj = elf_hash_table (info)->dynobj;
6190
6191 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
6192 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
6193 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6194
6195 if (elf_hash_table (info)->dynamic_sections_created)
6196 {
6197 asection *splt;
6198 Elf32_External_Dyn *dyncon, *dynconend;
6199 struct elf32_arm_link_hash_table *htab;
6200
6201 htab = elf32_arm_hash_table (info);
6202 splt = bfd_get_section_by_name (dynobj, ".plt");
6203 BFD_ASSERT (splt != NULL && sdyn != NULL);
6204
6205 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6206 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6207
6208 for (; dyncon < dynconend; dyncon++)
6209 {
6210 Elf_Internal_Dyn dyn;
6211 const char * name;
6212 asection * s;
6213
6214 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
6215
6216 switch (dyn.d_tag)
6217 {
6218 unsigned int type;
6219
6220 default:
6221 break;
6222
6223 case DT_HASH:
6224 name = ".hash";
6225 goto get_vma_if_bpabi;
6226 case DT_STRTAB:
6227 name = ".dynstr";
6228 goto get_vma_if_bpabi;
6229 case DT_SYMTAB:
6230 name = ".dynsym";
6231 goto get_vma_if_bpabi;
6232 case DT_VERSYM:
6233 name = ".gnu.version";
6234 goto get_vma_if_bpabi;
6235 case DT_VERDEF:
6236 name = ".gnu.version_d";
6237 goto get_vma_if_bpabi;
6238 case DT_VERNEED:
6239 name = ".gnu.version_r";
6240 goto get_vma_if_bpabi;
6241
6242 case DT_PLTGOT:
6243 name = ".got";
6244 goto get_vma;
6245 case DT_JMPREL:
6246 name = ".rel.plt";
6247 get_vma:
6248 s = bfd_get_section_by_name (output_bfd, name);
6249 BFD_ASSERT (s != NULL);
6250 if (!htab->symbian_p)
6251 dyn.d_un.d_ptr = s->vma;
6252 else
6253 /* In the BPABI, tags in the PT_DYNAMIC section point
6254 at the file offset, not the memory address, for the
6255 convenience of the post linker. */
6256 dyn.d_un.d_ptr = s->filepos;
6257 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6258 break;
6259
6260 get_vma_if_bpabi:
6261 if (htab->symbian_p)
6262 goto get_vma;
6263 break;
6264
6265 case DT_PLTRELSZ:
6266 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
6267 BFD_ASSERT (s != NULL);
6268 dyn.d_un.d_val = s->size;
6269 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6270 break;
6271
6272 case DT_RELSZ:
6273 if (!htab->symbian_p)
6274 {
6275 /* My reading of the SVR4 ABI indicates that the
6276 procedure linkage table relocs (DT_JMPREL) should be
6277 included in the overall relocs (DT_REL). This is
6278 what Solaris does. However, UnixWare can not handle
6279 that case. Therefore, we override the DT_RELSZ entry
6280 here to make it not include the JMPREL relocs. Since
6281 the linker script arranges for .rel.plt to follow all
6282 other relocation sections, we don't have to worry
6283 about changing the DT_REL entry. */
6284 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
6285 if (s != NULL)
6286 dyn.d_un.d_val -= s->size;
6287 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6288 break;
6289 }
6290 /* Fall through */
6291
6292 case DT_REL:
6293 case DT_RELA:
6294 case DT_RELASZ:
6295 /* In the BPABI, the DT_REL tag must point at the file
6296 offset, not the VMA, of the first relocation
6297 section. So, we use code similar to that in
6298 elflink.c, but do not check for SHF_ALLOC on the
6299 relcoation section, since relocations sections are
6300 never allocated under the BPABI. The comments above
6301 about Unixware notwithstanding, we include all of the
6302 relocations here. */
6303 if (htab->symbian_p)
6304 {
6305 unsigned int i;
6306 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
6307 ? SHT_REL : SHT_RELA);
6308 dyn.d_un.d_val = 0;
6309 for (i = 1; i < elf_numsections (output_bfd); i++)
6310 {
6311 Elf_Internal_Shdr *hdr
6312 = elf_elfsections (output_bfd)[i];
6313 if (hdr->sh_type == type)
6314 {
6315 if (dyn.d_tag == DT_RELSZ
6316 || dyn.d_tag == DT_RELASZ)
6317 dyn.d_un.d_val += hdr->sh_size;
6318 else if ((ufile_ptr) hdr->sh_offset
6319 <= dyn.d_un.d_val - 1)
6320 dyn.d_un.d_val = hdr->sh_offset;
6321 }
6322 }
6323 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6324 }
6325 break;
6326
6327 /* Set the bottom bit of DT_INIT/FINI if the
6328 corresponding function is Thumb. */
6329 case DT_INIT:
6330 name = info->init_function;
6331 goto get_sym;
6332 case DT_FINI:
6333 name = info->fini_function;
6334 get_sym:
6335 /* If it wasn't set by elf_bfd_final_link
6336 then there is nothing to adjust. */
6337 if (dyn.d_un.d_val != 0)
6338 {
6339 struct elf_link_hash_entry * eh;
6340
6341 eh = elf_link_hash_lookup (elf_hash_table (info), name,
6342 FALSE, FALSE, TRUE);
6343 if (eh != (struct elf_link_hash_entry *) NULL
6344 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
6345 {
6346 dyn.d_un.d_val |= 1;
6347 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6348 }
6349 }
6350 break;
6351 }
6352 }
6353
6354 /* Fill in the first entry in the procedure linkage table. */
6355 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
6356 {
6357 bfd_vma got_displacement;
6358
6359 /* Calculate the displacement between the PLT slot and &GOT[0]. */
6360 got_displacement = (sgot->output_section->vma
6361 + sgot->output_offset
6362 - splt->output_section->vma
6363 - splt->output_offset
6364 - 16);
6365
6366 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
6367 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
6368 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
6369 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
6370 #ifdef FOUR_WORD_PLT
6371 /* The displacement value goes in the otherwise-unused last word of
6372 the second entry. */
6373 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
6374 #else
6375 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
6376 #endif
6377 }
6378
6379 /* UnixWare sets the entsize of .plt to 4, although that doesn't
6380 really seem like the right value. */
6381 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
6382 }
6383
6384 /* Fill in the first three entries in the global offset table. */
6385 if (sgot)
6386 {
6387 if (sgot->size > 0)
6388 {
6389 if (sdyn == NULL)
6390 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
6391 else
6392 bfd_put_32 (output_bfd,
6393 sdyn->output_section->vma + sdyn->output_offset,
6394 sgot->contents);
6395 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
6396 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
6397 }
6398
6399 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
6400 }
6401
6402 return TRUE;
6403 }
6404
6405 static void
6406 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
6407 {
6408 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
6409 struct elf32_arm_link_hash_table *globals;
6410
6411 i_ehdrp = elf_elfheader (abfd);
6412
6413 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
6414 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
6415 else
6416 i_ehdrp->e_ident[EI_OSABI] = 0;
6417 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
6418
6419 if (link_info)
6420 {
6421 globals = elf32_arm_hash_table (link_info);
6422 if (globals->byteswap_code)
6423 i_ehdrp->e_flags |= EF_ARM_BE8;
6424 }
6425 }
6426
6427 static enum elf_reloc_type_class
6428 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
6429 {
6430 switch ((int) ELF32_R_TYPE (rela->r_info))
6431 {
6432 case R_ARM_RELATIVE:
6433 return reloc_class_relative;
6434 case R_ARM_JUMP_SLOT:
6435 return reloc_class_plt;
6436 case R_ARM_COPY:
6437 return reloc_class_copy;
6438 default:
6439 return reloc_class_normal;
6440 }
6441 }
6442
6443 /* Set the right machine number for an Arm ELF file. */
6444
6445 static bfd_boolean
6446 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
6447 {
6448 if (hdr->sh_type == SHT_NOTE)
6449 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
6450
6451 return TRUE;
6452 }
6453
6454 static void
6455 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6456 {
6457 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
6458 }
6459
6460 /* Return TRUE if this is an unwinding table entry. */
6461
6462 static bfd_boolean
6463 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
6464 {
6465 size_t len1, len2;
6466
6467 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
6468 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
6469 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
6470 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
6471 }
6472
6473
6474 /* Set the type and flags for an ARM section. We do this by
6475 the section name, which is a hack, but ought to work. */
6476
6477 static bfd_boolean
6478 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
6479 {
6480 const char * name;
6481
6482 name = bfd_get_section_name (abfd, sec);
6483
6484 if (is_arm_elf_unwind_section_name (abfd, name))
6485 {
6486 hdr->sh_type = SHT_ARM_EXIDX;
6487 hdr->sh_flags |= SHF_LINK_ORDER;
6488 }
6489 return TRUE;
6490 }
6491
6492 /* Handle an ARM specific section when reading an object file. This is
6493 called when bfd_section_from_shdr finds a section with an unknown
6494 type. */
6495
6496 static bfd_boolean
6497 elf32_arm_section_from_shdr (bfd *abfd,
6498 Elf_Internal_Shdr * hdr,
6499 const char *name,
6500 int shindex)
6501 {
6502 /* There ought to be a place to keep ELF backend specific flags, but
6503 at the moment there isn't one. We just keep track of the
6504 sections by their name, instead. Fortunately, the ABI gives
6505 names for all the ARM specific sections, so we will probably get
6506 away with this. */
6507 switch (hdr->sh_type)
6508 {
6509 case SHT_ARM_EXIDX:
6510 break;
6511
6512 default:
6513 return FALSE;
6514 }
6515
6516 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6517 return FALSE;
6518
6519 return TRUE;
6520 }
6521
6522 /* Called for each symbol. Builds a section map based on mapping symbols.
6523 Does not alter any of the symbols. */
6524
6525 static bfd_boolean
6526 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
6527 const char *name,
6528 Elf_Internal_Sym *elfsym,
6529 asection *input_sec,
6530 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
6531 {
6532 int mapcount;
6533 elf32_arm_section_map *map;
6534 struct elf32_arm_link_hash_table *globals;
6535
6536 /* Only do this on final link. */
6537 if (info->relocatable)
6538 return TRUE;
6539
6540 /* Only build a map if we need to byteswap code. */
6541 globals = elf32_arm_hash_table (info);
6542 if (!globals->byteswap_code)
6543 return TRUE;
6544
6545 /* We only want mapping symbols. */
6546 if (! bfd_is_arm_mapping_symbol_name (name))
6547 return TRUE;
6548
6549 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
6550 map = elf32_arm_section_data (input_sec)->map;
6551 /* TODO: This may be inefficient, but we probably don't usually have many
6552 mapping symbols per section. */
6553 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
6554 elf32_arm_section_data (input_sec)->map = map;
6555
6556 map[mapcount - 1].vma = elfsym->st_value;
6557 map[mapcount - 1].type = name[1];
6558 return TRUE;
6559 }
6560
6561
6562 /* Allocate target specific section data. */
6563
6564 static bfd_boolean
6565 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
6566 {
6567 struct _arm_elf_section_data *sdata;
6568 bfd_size_type amt = sizeof (*sdata);
6569
6570 sdata = bfd_zalloc (abfd, amt);
6571 if (sdata == NULL)
6572 return FALSE;
6573 sec->used_by_bfd = sdata;
6574
6575 return _bfd_elf_new_section_hook (abfd, sec);
6576 }
6577
6578
6579 /* Used to order a list of mapping symbols by address. */
6580
6581 static int
6582 elf32_arm_compare_mapping (const void * a, const void * b)
6583 {
6584 return ((const elf32_arm_section_map *) a)->vma
6585 > ((const elf32_arm_section_map *) b)->vma;
6586 }
6587
6588
6589 /* Do code byteswapping. Return FALSE afterwards so that the section is
6590 written out as normal. */
6591
6592 static bfd_boolean
6593 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
6594 bfd_byte *contents)
6595 {
6596 int mapcount;
6597 elf32_arm_section_map *map;
6598 bfd_vma ptr;
6599 bfd_vma end;
6600 bfd_vma offset;
6601 bfd_byte tmp;
6602 int i;
6603
6604 mapcount = elf32_arm_section_data (sec)->mapcount;
6605 map = elf32_arm_section_data (sec)->map;
6606
6607 if (mapcount == 0)
6608 return FALSE;
6609
6610 qsort (map, mapcount, sizeof (elf32_arm_section_map),
6611 elf32_arm_compare_mapping);
6612
6613 offset = sec->output_section->vma + sec->output_offset;
6614 ptr = map[0].vma - offset;
6615 for (i = 0; i < mapcount; i++)
6616 {
6617 if (i == mapcount - 1)
6618 end = sec->size;
6619 else
6620 end = map[i + 1].vma - offset;
6621
6622 switch (map[i].type)
6623 {
6624 case 'a':
6625 /* Byte swap code words. */
6626 while (ptr + 3 < end)
6627 {
6628 tmp = contents[ptr];
6629 contents[ptr] = contents[ptr + 3];
6630 contents[ptr + 3] = tmp;
6631 tmp = contents[ptr + 1];
6632 contents[ptr + 1] = contents[ptr + 2];
6633 contents[ptr + 2] = tmp;
6634 ptr += 4;
6635 }
6636 break;
6637
6638 case 't':
6639 /* Byte swap code halfwords. */
6640 while (ptr + 1 < end)
6641 {
6642 tmp = contents[ptr];
6643 contents[ptr] = contents[ptr + 1];
6644 contents[ptr + 1] = tmp;
6645 ptr += 2;
6646 }
6647 break;
6648
6649 case 'd':
6650 /* Leave data alone. */
6651 break;
6652 }
6653 ptr = end;
6654 }
6655 free (map);
6656 return FALSE;
6657 }
6658
6659 /* Display STT_ARM_TFUNC symbols as functions. */
6660
6661 static void
6662 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6663 asymbol *asym)
6664 {
6665 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6666
6667 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
6668 elfsym->symbol.flags |= BSF_FUNCTION;
6669 }
6670
6671
6672 /* Mangle thumb function symbols as we read them in. */
6673
6674 static void
6675 elf32_arm_swap_symbol_in (bfd * abfd,
6676 const void *psrc,
6677 const void *pshn,
6678 Elf_Internal_Sym *dst)
6679 {
6680 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
6681
6682 /* New EABI objects mark thumb function symbols by setting the low bit of
6683 the address. Turn these into STT_ARM_TFUNC. */
6684 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
6685 && (dst->st_value & 1))
6686 {
6687 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
6688 dst->st_value &= ~(bfd_vma) 1;
6689 }
6690 }
6691
6692
6693 /* Mangle thumb function symbols as we write them out. */
6694
6695 static void
6696 elf32_arm_swap_symbol_out (bfd *abfd,
6697 const Elf_Internal_Sym *src,
6698 void *cdst,
6699 void *shndx)
6700 {
6701 Elf_Internal_Sym newsym;
6702
6703 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
6704 of the address set, as per the new EABI. We do this unconditionally
6705 because objcopy does not set the elf header flags until after
6706 it writes out the symbol table. */
6707 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
6708 {
6709 newsym = *src;
6710 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
6711 newsym.st_value |= 1;
6712
6713 src = &newsym;
6714 }
6715 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
6716 }
6717
6718 /* Add the PT_ARM_EXIDX program header. */
6719
6720 static bfd_boolean
6721 elf32_arm_modify_segment_map (bfd *abfd,
6722 struct bfd_link_info *info ATTRIBUTE_UNUSED)
6723 {
6724 struct elf_segment_map *m;
6725 asection *sec;
6726
6727 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6728 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6729 {
6730 /* If there is already a PT_ARM_EXIDX header, then we do not
6731 want to add another one. This situation arises when running
6732 "strip"; the input binary already has the header. */
6733 m = elf_tdata (abfd)->segment_map;
6734 while (m && m->p_type != PT_ARM_EXIDX)
6735 m = m->next;
6736 if (!m)
6737 {
6738 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
6739 if (m == NULL)
6740 return FALSE;
6741 m->p_type = PT_ARM_EXIDX;
6742 m->count = 1;
6743 m->sections[0] = sec;
6744
6745 m->next = elf_tdata (abfd)->segment_map;
6746 elf_tdata (abfd)->segment_map = m;
6747 }
6748 }
6749
6750 return TRUE;
6751 }
6752
6753 /* We may add a PT_ARM_EXIDX program header. */
6754
6755 static int
6756 elf32_arm_additional_program_headers (bfd *abfd)
6757 {
6758 asection *sec;
6759
6760 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6761 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6762 return 1;
6763 else
6764 return 0;
6765 }
6766
6767 /* We use this to override swap_symbol_in and swap_symbol_out. */
6768 const struct elf_size_info elf32_arm_size_info = {
6769 sizeof (Elf32_External_Ehdr),
6770 sizeof (Elf32_External_Phdr),
6771 sizeof (Elf32_External_Shdr),
6772 sizeof (Elf32_External_Rel),
6773 sizeof (Elf32_External_Rela),
6774 sizeof (Elf32_External_Sym),
6775 sizeof (Elf32_External_Dyn),
6776 sizeof (Elf_External_Note),
6777 4,
6778 1,
6779 32, 2,
6780 ELFCLASS32, EV_CURRENT,
6781 bfd_elf32_write_out_phdrs,
6782 bfd_elf32_write_shdrs_and_ehdr,
6783 bfd_elf32_write_relocs,
6784 elf32_arm_swap_symbol_in,
6785 elf32_arm_swap_symbol_out,
6786 bfd_elf32_slurp_reloc_table,
6787 bfd_elf32_slurp_symbol_table,
6788 bfd_elf32_swap_dyn_in,
6789 bfd_elf32_swap_dyn_out,
6790 bfd_elf32_swap_reloc_in,
6791 bfd_elf32_swap_reloc_out,
6792 bfd_elf32_swap_reloca_in,
6793 bfd_elf32_swap_reloca_out
6794 };
6795
6796 #define ELF_ARCH bfd_arch_arm
6797 #define ELF_MACHINE_CODE EM_ARM
6798 #ifdef __QNXTARGET__
6799 #define ELF_MAXPAGESIZE 0x1000
6800 #else
6801 #define ELF_MAXPAGESIZE 0x8000
6802 #endif
6803 #define ELF_MINPAGESIZE 0x1000
6804
6805 #define bfd_elf32_mkobject elf32_arm_mkobject
6806
6807 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
6808 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
6809 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
6810 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
6811 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
6812 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
6813 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
6814 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
6815 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
6816 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
6817
6818 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
6819 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
6820 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
6821 #define elf_backend_check_relocs elf32_arm_check_relocs
6822 #define elf_backend_relocate_section elf32_arm_relocate_section
6823 #define elf_backend_write_section elf32_arm_write_section
6824 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
6825 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
6826 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
6827 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
6828 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
6829 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
6830 #define elf_backend_post_process_headers elf32_arm_post_process_headers
6831 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
6832 #define elf_backend_object_p elf32_arm_object_p
6833 #define elf_backend_section_flags elf32_arm_section_flags
6834 #define elf_backend_fake_sections elf32_arm_fake_sections
6835 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
6836 #define elf_backend_final_write_processing elf32_arm_final_write_processing
6837 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
6838 #define elf_backend_symbol_processing elf32_arm_symbol_processing
6839 #define elf_backend_size_info elf32_arm_size_info
6840 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
6841 #define elf_backend_additional_program_headers \
6842 elf32_arm_additional_program_headers
6843
6844 #define elf_backend_can_refcount 1
6845 #define elf_backend_can_gc_sections 1
6846 #define elf_backend_plt_readonly 1
6847 #define elf_backend_want_got_plt 1
6848 #define elf_backend_want_plt_sym 0
6849 #define elf_backend_may_use_rel_p 1
6850 #define elf_backend_may_use_rela_p 0
6851 #define elf_backend_default_use_rela_p 0
6852 #define elf_backend_rela_normal 0
6853
6854 #define elf_backend_got_header_size 12
6855
6856 #include "elf32-target.h"
6857
6858 /* VxWorks Targets */
6859
6860 #undef TARGET_LITTLE_SYM
6861 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
6862 #undef TARGET_LITTLE_NAME
6863 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
6864 #undef TARGET_BIG_SYM
6865 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
6866 #undef TARGET_BIG_NAME
6867 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
6868
6869 /* Like elf32_arm_link_hash_table_create -- but overrides
6870 appropriately for VxWorks. */
6871 static struct bfd_link_hash_table *
6872 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
6873 {
6874 struct bfd_link_hash_table *ret;
6875
6876 ret = elf32_arm_link_hash_table_create (abfd);
6877 if (ret)
6878 {
6879 struct elf32_arm_link_hash_table *htab
6880 = (struct elf32_arm_link_hash_table *)ret;
6881 htab->use_rel = 0;
6882 }
6883 return ret;
6884 }
6885
6886 #undef elf32_bed
6887 #define elf32_bed elf32_arm_vxworks_bed
6888
6889 #undef bfd_elf32_bfd_link_hash_table_create
6890 #define bfd_elf32_bfd_link_hash_table_create \
6891 elf32_arm_vxworks_link_hash_table_create
6892
6893 #undef elf_backend_may_use_rel_p
6894 #define elf_backend_may_use_rel_p 0
6895 #undef elf_backend_may_use_rela_p
6896 #define elf_backend_may_use_rela_p 1
6897 #undef elf_backend_default_use_rela_p
6898 #define elf_backend_default_use_rela_p 1
6899 #undef elf_backend_rela_normal
6900 #define elf_backend_rela_normal 1
6901
6902 #include "elf32-target.h"
6903
6904
6905 /* Symbian OS Targets */
6906
6907 #undef TARGET_LITTLE_SYM
6908 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
6909 #undef TARGET_LITTLE_NAME
6910 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
6911 #undef TARGET_BIG_SYM
6912 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
6913 #undef TARGET_BIG_NAME
6914 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
6915
6916 /* Like elf32_arm_link_hash_table_create -- but overrides
6917 appropriately for Symbian OS. */
6918 static struct bfd_link_hash_table *
6919 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
6920 {
6921 struct bfd_link_hash_table *ret;
6922
6923 ret = elf32_arm_link_hash_table_create (abfd);
6924 if (ret)
6925 {
6926 struct elf32_arm_link_hash_table *htab
6927 = (struct elf32_arm_link_hash_table *)ret;
6928 /* There is no PLT header for Symbian OS. */
6929 htab->plt_header_size = 0;
6930 /* The PLT entries are each three instructions. */
6931 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
6932 htab->symbian_p = 1;
6933 /* Symbian uses armv5t or above, so use_blx is always true. */
6934 htab->use_blx = 1;
6935 htab->root.is_relocatable_executable = 1;
6936 }
6937 return ret;
6938 }
6939
6940 static struct bfd_elf_special_section const
6941 symbian_special_sections_d[]=
6942 {
6943 /* In a BPABI executable, the dynamic linking sections do not go in
6944 the loadable read-only segment. The post-linker may wish to
6945 refer to these sections, but they are not part of the final
6946 program image. */
6947 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
6948 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
6949 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
6950 { NULL, 0, 0, 0, 0 }
6951 };
6952
6953 static struct bfd_elf_special_section const
6954 symbian_special_sections_g[]=
6955 {
6956 /* In a BPABI executable, the dynamic linking sections do not go in
6957 the loadable read-only segment. The post-linker may wish to
6958 refer to these sections, but they are not part of the final
6959 program image. */
6960 { ".got", 4, 0, SHT_PROGBITS, 0 },
6961 { NULL, 0, 0, 0, 0 }
6962 };
6963
6964 static struct bfd_elf_special_section const
6965 symbian_special_sections_h[]=
6966 {
6967 /* In a BPABI executable, the dynamic linking sections do not go in
6968 the loadable read-only segment. The post-linker may wish to
6969 refer to these sections, but they are not part of the final
6970 program image. */
6971 { ".hash", 5, 0, SHT_HASH, 0 },
6972 { NULL, 0, 0, 0, 0 }
6973 };
6974
6975 static struct bfd_elf_special_section const
6976 symbian_special_sections_i[]=
6977 {
6978 /* These sections do not need to be writable as the SymbianOS
6979 postlinker will arrange things so that no dynamic relocation is
6980 required. */
6981 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
6982 { NULL, 0, 0, 0, 0 }
6983 };
6984
6985 static struct bfd_elf_special_section const
6986 symbian_special_sections_f[]=
6987 {
6988 /* These sections do not need to be writable as the SymbianOS
6989 postlinker will arrange things so that no dynamic relocation is
6990 required. */
6991 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
6992 { NULL, 0, 0, 0, 0 }
6993 };
6994
6995 static struct bfd_elf_special_section const
6996 symbian_special_sections_p[]=
6997 {
6998 /* These sections do not need to be writable as the SymbianOS
6999 postlinker will arrange things so that no dynamic relocation is
7000 required. */
7001 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
7002 { NULL, 0, 0, 0, 0 }
7003 };
7004
7005 static struct bfd_elf_special_section const *
7006 elf32_arm_symbian_special_sections[27]=
7007 {
7008 NULL, /* 'a' */
7009 NULL, /* 'b' */
7010 NULL, /* 'c' */
7011 symbian_special_sections_d, /* 'd' */
7012 NULL, /* 'e' */
7013 symbian_special_sections_f, /* 'f' */
7014 symbian_special_sections_g, /* 'g' */
7015 symbian_special_sections_h, /* 'h' */
7016 symbian_special_sections_i, /* 'i' */
7017 NULL, /* 'j' */
7018 NULL, /* 'k' */
7019 NULL, /* 'l' */
7020 NULL, /* 'm' */
7021 NULL, /* 'n' */
7022 NULL, /* 'o' */
7023 symbian_special_sections_p, /* 'p' */
7024 NULL, /* 'q' */
7025 NULL, /* 'r' */
7026 NULL, /* 's' */
7027 NULL, /* 't' */
7028 NULL, /* 'u' */
7029 NULL, /* 'v' */
7030 NULL, /* 'w' */
7031 NULL, /* 'x' */
7032 NULL, /* 'y' */
7033 NULL, /* 'z' */
7034 NULL /* other */
7035 };
7036
7037 static void
7038 elf32_arm_symbian_begin_write_processing (bfd *abfd,
7039 struct bfd_link_info *link_info
7040 ATTRIBUTE_UNUSED)
7041 {
7042 /* BPABI objects are never loaded directly by an OS kernel; they are
7043 processed by a postlinker first, into an OS-specific format. If
7044 the D_PAGED bit is set on the file, BFD will align segments on
7045 page boundaries, so that an OS can directly map the file. With
7046 BPABI objects, that just results in wasted space. In addition,
7047 because we clear the D_PAGED bit, map_sections_to_segments will
7048 recognize that the program headers should not be mapped into any
7049 loadable segment. */
7050 abfd->flags &= ~D_PAGED;
7051 }
7052
7053 static bfd_boolean
7054 elf32_arm_symbian_modify_segment_map (bfd *abfd,
7055 struct bfd_link_info *info)
7056 {
7057 struct elf_segment_map *m;
7058 asection *dynsec;
7059
7060 /* BPABI shared libraries and executables should have a PT_DYNAMIC
7061 segment. However, because the .dynamic section is not marked
7062 with SEC_LOAD, the generic ELF code will not create such a
7063 segment. */
7064 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
7065 if (dynsec)
7066 {
7067 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
7068 m->next = elf_tdata (abfd)->segment_map;
7069 elf_tdata (abfd)->segment_map = m;
7070 }
7071
7072 /* Also call the generic arm routine. */
7073 return elf32_arm_modify_segment_map (abfd, info);
7074 }
7075
7076 #undef elf32_bed
7077 #define elf32_bed elf32_arm_symbian_bed
7078
7079 /* The dynamic sections are not allocated on SymbianOS; the postlinker
7080 will process them and then discard them. */
7081 #undef ELF_DYNAMIC_SEC_FLAGS
7082 #define ELF_DYNAMIC_SEC_FLAGS \
7083 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
7084
7085 #undef bfd_elf32_bfd_link_hash_table_create
7086 #define bfd_elf32_bfd_link_hash_table_create \
7087 elf32_arm_symbian_link_hash_table_create
7088
7089 #undef elf_backend_special_sections
7090 #define elf_backend_special_sections elf32_arm_symbian_special_sections
7091
7092 #undef elf_backend_begin_write_processing
7093 #define elf_backend_begin_write_processing \
7094 elf32_arm_symbian_begin_write_processing
7095
7096 #undef elf_backend_modify_segment_map
7097 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
7098
7099 /* There is no .got section for BPABI objects, and hence no header. */
7100 #undef elf_backend_got_header_size
7101 #define elf_backend_got_header_size 0
7102
7103 /* Similarly, there is no .got.plt section. */
7104 #undef elf_backend_want_got_plt
7105 #define elf_backend_want_got_plt 0
7106
7107 #undef elf_backend_may_use_rel_p
7108 #define elf_backend_may_use_rel_p 1
7109 #undef elf_backend_may_use_rela_p
7110 #define elf_backend_may_use_rela_p 0
7111 #undef elf_backend_default_use_rela_p
7112 #define elf_backend_default_use_rela_p 0
7113 #undef elf_backend_rela_normal
7114 #define elf_backend_rela_normal 0
7115
7116 #include "elf32-target.h"
GDB Binutils - Deliverables
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