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 *
elf32_arm_howto_from_type(unsigned int r_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
elf32_arm_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * bfd_reloc,Elf_Internal_Rela * elf_reloc)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 *
elf32_arm_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)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
elf32_arm_nabi_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)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
elf32_arm_nabi_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)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
elf32_arm_mkobject(bfd * abfd)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 *
elf32_arm_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)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
create_got_section(bfd * dynobj,struct bfd_link_info * info)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
elf32_arm_create_dynamic_sections(bfd * dynobj,struct bfd_link_info * info)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
elf32_arm_copy_indirect_symbol(const struct elf_backend_data * bed,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)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 *
elf32_arm_link_hash_table_create(bfd * abfd)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 *
find_thumb_glue(struct bfd_link_info * link_info,const char * name,bfd * input_bfd)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 *
find_arm_glue(struct bfd_link_info * link_info,const char * name,bfd * input_bfd)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
bfd_elf32_arm_allocate_interworking_sections(struct bfd_link_info * info)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
record_arm_to_thumb_glue(struct bfd_link_info * link_info,struct elf_link_hash_entry * h)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
record_thumb_to_arm_glue(struct bfd_link_info * link_info,struct elf_link_hash_entry * h)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
bfd_elf32_arm_add_glue_sections_to_bfd(bfd * abfd,struct bfd_link_info * info)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
bfd_elf32_arm_get_bfd_for_interworking(bfd * abfd,struct bfd_link_info * info)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
bfd_elf32_arm_process_before_allocation(bfd * abfd,struct bfd_link_info * link_info,int byteswap_code)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
bfd_elf32_arm_set_target_relocs(struct bfd_link_info * link_info,int target1_is_rel,char * target2_type,int fix_v4bx,int use_blx)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
insert_thumb_branch(insn32 br_insn,int rel_off)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
elf32_thumb_to_arm_stub(struct bfd_link_info * info,const char * name,bfd * input_bfd,bfd * output_bfd,asection * input_section,bfd_byte * hit_data,asection * sym_sec,bfd_vma offset,bfd_signed_vma addend,bfd_vma val)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
elf32_arm_to_thumb_stub(struct bfd_link_info * info,const char * name,bfd * input_bfd,bfd * output_bfd,asection * input_section,bfd_byte * hit_data,asection * sym_sec,bfd_vma offset,bfd_signed_vma addend,bfd_vma val)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
arm_real_reloc_type(struct elf32_arm_link_hash_table * globals,int r_type)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
dtpoff_base(struct bfd_link_info * info)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
tpoff(struct bfd_link_info * info,bfd_vma address)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
elf32_arm_final_link_relocate(reloc_howto_type * howto,bfd * input_bfd,bfd * output_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * rel,bfd_vma value,struct bfd_link_info * info,asection * sym_sec,const char * sym_name,int sym_flags,struct elf_link_hash_entry * h,bfd_boolean * unresolved_reloc_p)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
arm_add_to_rel(bfd * abfd,bfd_byte * address,reloc_howto_type * howto,bfd_signed_vma increment)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
elf32_arm_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)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
elf32_arm_object_p(bfd * abfd)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
elf32_arm_set_private_flags(bfd * abfd,flagword flags)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
elf32_arm_copy_private_bfd_data(bfd * ibfd,bfd * obfd)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
elf32_arm_merge_private_bfd_data(bfd * ibfd,bfd * obfd)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
elf32_arm_print_private_bfd_data(bfd * abfd,void * ptr)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
elf32_arm_get_symbol_type(Elf_Internal_Sym * elf_sym,int type)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 *
elf32_arm_gc_mark_hook(asection * sec,struct bfd_link_info * info ATTRIBUTE_UNUSED,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)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
elf32_arm_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)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
elf32_arm_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)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 {
4916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4917 while (h->root.type == bfd_link_hash_indirect
4918 || h->root.type == bfd_link_hash_warning)
4919 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4920 }
4921
4922 eh = (struct elf32_arm_link_hash_entry *) h;
4923
4924 switch (r_type)
4925 {
4926 case R_ARM_GOT32:
4927 case R_ARM_GOT_PREL:
4928 case R_ARM_TLS_GD32:
4929 case R_ARM_TLS_IE32:
4930 /* This symbol requires a global offset table entry. */
4931 {
4932 int tls_type, old_tls_type;
4933
4934 switch (r_type)
4935 {
4936 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
4937 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
4938 default: tls_type = GOT_NORMAL; break;
4939 }
4940
4941 if (h != NULL)
4942 {
4943 h->got.refcount++;
4944 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
4945 }
4946 else
4947 {
4948 bfd_signed_vma *local_got_refcounts;
4949
4950 /* This is a global offset table entry for a local symbol. */
4951 local_got_refcounts = elf_local_got_refcounts (abfd);
4952 if (local_got_refcounts == NULL)
4953 {
4954 bfd_size_type size;
4955
4956 size = symtab_hdr->sh_info;
4957 size *= (sizeof (bfd_signed_vma) + sizeof(char));
4958 local_got_refcounts = bfd_zalloc (abfd, size);
4959 if (local_got_refcounts == NULL)
4960 return FALSE;
4961 elf_local_got_refcounts (abfd) = local_got_refcounts;
4962 elf32_arm_local_got_tls_type (abfd)
4963 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4964 }
4965 local_got_refcounts[r_symndx] += 1;
4966 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
4967 }
4968
4969 /* We will already have issued an error message if there is a
4970 TLS / non-TLS mismatch, based on the symbol type. We don't
4971 support any linker relaxations. So just combine any TLS
4972 types needed. */
4973 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4974 && tls_type != GOT_NORMAL)
4975 tls_type |= old_tls_type;
4976
4977 if (old_tls_type != tls_type)
4978 {
4979 if (h != NULL)
4980 elf32_arm_hash_entry (h)->tls_type = tls_type;
4981 else
4982 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
4983 }
4984 }
4985 /* Fall through */
4986
4987 case R_ARM_TLS_LDM32:
4988 if (r_type == R_ARM_TLS_LDM32)
4989 htab->tls_ldm_got.refcount++;
4990 /* Fall through */
4991
4992 case R_ARM_GOTOFF32:
4993 case R_ARM_GOTPC:
4994 if (htab->sgot == NULL)
4995 {
4996 if (htab->root.dynobj == NULL)
4997 htab->root.dynobj = abfd;
4998 if (!create_got_section (htab->root.dynobj, info))
4999 return FALSE;
5000 }
5001 break;
5002
5003 case R_ARM_ABS32:
5004 case R_ARM_REL32:
5005 case R_ARM_PC24:
5006 case R_ARM_PLT32:
5007 case R_ARM_CALL:
5008 case R_ARM_JUMP24:
5009 case R_ARM_PREL31:
5010 case R_ARM_THM_CALL:
5011 /* Should the interworking branches be listed here? */
5012 if (h != NULL)
5013 {
5014 /* If this reloc is in a read-only section, we might
5015 need a copy reloc. We can't check reliably at this
5016 stage whether the section is read-only, as input
5017 sections have not yet been mapped to output sections.
5018 Tentatively set the flag for now, and correct in
5019 adjust_dynamic_symbol. */
5020 if (!info->shared)
5021 h->non_got_ref = 1;
5022
5023 /* We may need a .plt entry if the function this reloc
5024 refers to is in a different object. We can't tell for
5025 sure yet, because something later might force the
5026 symbol local. */
5027 if (r_type == R_ARM_PC24
5028 || r_type == R_ARM_CALL
5029 || r_type == R_ARM_JUMP24
5030 || r_type == R_ARM_PREL31
5031 || r_type == R_ARM_PLT32
5032 || r_type == R_ARM_THM_CALL)
5033 h->needs_plt = 1;
5034
5035 /* If we create a PLT entry, this relocation will reference
5036 it, even if it's an ABS32 relocation. */
5037 h->plt.refcount += 1;
5038
5039 if (r_type == R_ARM_THM_CALL)
5040 eh->plt_thumb_refcount += 1;
5041 }
5042
5043 /* If we are creating a shared library or relocatable executable,
5044 and this is a reloc against a global symbol, or a non PC
5045 relative reloc against a local symbol, then we need to copy
5046 the reloc into the shared library. However, if we are linking
5047 with -Bsymbolic, we do not need to copy a reloc against a
5048 global symbol which is defined in an object we are
5049 including in the link (i.e., DEF_REGULAR is set). At
5050 this point we have not seen all the input files, so it is
5051 possible that DEF_REGULAR is not set now but will be set
5052 later (it is never cleared). We account for that
5053 possibility below by storing information in the
5054 relocs_copied field of the hash table entry. */
5055 if ((info->shared || htab->root.is_relocatable_executable)
5056 && (sec->flags & SEC_ALLOC) != 0
5057 && (r_type == R_ARM_ABS32
5058 || (h != NULL && ! h->needs_plt
5059 && (! info->symbolic || ! h->def_regular))))
5060 {
5061 struct elf32_arm_relocs_copied *p, **head;
5062
5063 /* When creating a shared object, we must copy these
5064 reloc types into the output file. We create a reloc
5065 section in dynobj and make room for this reloc. */
5066 if (sreloc == NULL)
5067 {
5068 const char * name;
5069
5070 name = (bfd_elf_string_from_elf_section
5071 (abfd,
5072 elf_elfheader (abfd)->e_shstrndx,
5073 elf_section_data (sec)->rel_hdr.sh_name));
5074 if (name == NULL)
5075 return FALSE;
5076
5077 BFD_ASSERT (strncmp (name, ".rel", 4) == 0
5078 && strcmp (bfd_get_section_name (abfd, sec),
5079 name + 4) == 0);
5080
5081 sreloc = bfd_get_section_by_name (dynobj, name);
5082 if (sreloc == NULL)
5083 {
5084 flagword flags;
5085
5086 flags = (SEC_HAS_CONTENTS | SEC_READONLY
5087 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5088 if ((sec->flags & SEC_ALLOC) != 0
5089 /* BPABI objects never have dynamic
5090 relocations mapped. */
5091 && !htab->symbian_p)
5092 flags |= SEC_ALLOC | SEC_LOAD;
5093 sreloc = bfd_make_section_with_flags (dynobj,
5094 name,
5095 flags);
5096 if (sreloc == NULL
5097 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
5098 return FALSE;
5099 }
5100
5101 elf_section_data (sec)->sreloc = sreloc;
5102 }
5103
5104 /* If this is a global symbol, we count the number of
5105 relocations we need for this symbol. */
5106 if (h != NULL)
5107 {
5108 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
5109 }
5110 else
5111 {
5112 /* Track dynamic relocs needed for local syms too.
5113 We really need local syms available to do this
5114 easily. Oh well. */
5115
5116 asection *s;
5117 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
5118 sec, r_symndx);
5119 if (s == NULL)
5120 return FALSE;
5121
5122 head = ((struct elf32_arm_relocs_copied **)
5123 &elf_section_data (s)->local_dynrel);
5124 }
5125
5126 p = *head;
5127 if (p == NULL || p->section != sec)
5128 {
5129 bfd_size_type amt = sizeof *p;
5130
5131 p = bfd_alloc (htab->root.dynobj, amt);
5132 if (p == NULL)
5133 return FALSE;
5134 p->next = *head;
5135 *head = p;
5136 p->section = sec;
5137 p->count = 0;
5138 p->pc_count = 0;
5139 }
5140
5141 if (r_type == R_ARM_REL32)
5142 p->pc_count += 1;
5143 p->count += 1;
5144 }
5145 break;
5146
5147 /* This relocation describes the C++ object vtable hierarchy.
5148 Reconstruct it for later use during GC. */
5149 case R_ARM_GNU_VTINHERIT:
5150 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5151 return FALSE;
5152 break;
5153
5154 /* This relocation describes which C++ vtable entries are actually
5155 used. Record for later use during GC. */
5156 case R_ARM_GNU_VTENTRY:
5157 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
5158 return FALSE;
5159 break;
5160 }
5161 }
5162
5163 return TRUE;
5164 }
5165
5166 /* Treat mapping symbols as special target symbols. */
5167
5168 static bfd_boolean
elf32_arm_is_target_special_symbol(bfd * abfd ATTRIBUTE_UNUSED,asymbol * sym)5169 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
5170 {
5171 return bfd_is_arm_mapping_symbol_name (sym->name);
5172 }
5173
5174 /* This is a copy of elf_find_function() from elf.c except that
5175 ARM mapping symbols are ignored when looking for function names
5176 and STT_ARM_TFUNC is considered to a function type. */
5177
5178 static bfd_boolean
arm_elf_find_function(bfd * abfd ATTRIBUTE_UNUSED,asection * section,asymbol ** symbols,bfd_vma offset,const char ** filename_ptr,const char ** functionname_ptr)5179 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
5180 asection * section,
5181 asymbol ** symbols,
5182 bfd_vma offset,
5183 const char ** filename_ptr,
5184 const char ** functionname_ptr)
5185 {
5186 const char * filename = NULL;
5187 asymbol * func = NULL;
5188 bfd_vma low_func = 0;
5189 asymbol ** p;
5190
5191 for (p = symbols; *p != NULL; p++)
5192 {
5193 elf_symbol_type *q;
5194
5195 q = (elf_symbol_type *) *p;
5196
5197 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
5198 {
5199 default:
5200 break;
5201 case STT_FILE:
5202 filename = bfd_asymbol_name (&q->symbol);
5203 break;
5204 case STT_FUNC:
5205 case STT_ARM_TFUNC:
5206 case STT_NOTYPE:
5207 /* Skip $a and $t symbols. */
5208 if ((q->symbol.flags & BSF_LOCAL)
5209 && bfd_is_arm_mapping_symbol_name (q->symbol.name))
5210 continue;
5211 /* Fall through. */
5212 if (bfd_get_section (&q->symbol) == section
5213 && q->symbol.value >= low_func
5214 && q->symbol.value <= offset)
5215 {
5216 func = (asymbol *) q;
5217 low_func = q->symbol.value;
5218 }
5219 break;
5220 }
5221 }
5222
5223 if (func == NULL)
5224 return FALSE;
5225
5226 if (filename_ptr)
5227 *filename_ptr = filename;
5228 if (functionname_ptr)
5229 *functionname_ptr = bfd_asymbol_name (func);
5230
5231 return TRUE;
5232 }
5233
5234
5235 /* Find the nearest line to a particular section and offset, for error
5236 reporting. This code is a duplicate of the code in elf.c, except
5237 that it uses arm_elf_find_function. */
5238
5239 static bfd_boolean
elf32_arm_find_nearest_line(bfd * abfd,asection * section,asymbol ** symbols,bfd_vma offset,const char ** filename_ptr,const char ** functionname_ptr,unsigned int * line_ptr)5240 elf32_arm_find_nearest_line (bfd * abfd,
5241 asection * section,
5242 asymbol ** symbols,
5243 bfd_vma offset,
5244 const char ** filename_ptr,
5245 const char ** functionname_ptr,
5246 unsigned int * line_ptr)
5247 {
5248 bfd_boolean found = FALSE;
5249
5250 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
5251
5252 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
5253 filename_ptr, functionname_ptr,
5254 line_ptr, 0,
5255 & elf_tdata (abfd)->dwarf2_find_line_info))
5256 {
5257 if (!*functionname_ptr)
5258 arm_elf_find_function (abfd, section, symbols, offset,
5259 *filename_ptr ? NULL : filename_ptr,
5260 functionname_ptr);
5261
5262 return TRUE;
5263 }
5264
5265 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
5266 & found, filename_ptr,
5267 functionname_ptr, line_ptr,
5268 & elf_tdata (abfd)->line_info))
5269 return FALSE;
5270
5271 if (found && (*functionname_ptr || *line_ptr))
5272 return TRUE;
5273
5274 if (symbols == NULL)
5275 return FALSE;
5276
5277 if (! arm_elf_find_function (abfd, section, symbols, offset,
5278 filename_ptr, functionname_ptr))
5279 return FALSE;
5280
5281 *line_ptr = 0;
5282 return TRUE;
5283 }
5284
5285 static bfd_boolean
elf32_arm_find_inliner_info(bfd * abfd,const char ** filename_ptr,const char ** functionname_ptr,unsigned int * line_ptr)5286 elf32_arm_find_inliner_info (bfd * abfd,
5287 const char ** filename_ptr,
5288 const char ** functionname_ptr,
5289 unsigned int * line_ptr)
5290 {
5291 bfd_boolean found;
5292 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
5293 functionname_ptr, line_ptr,
5294 & elf_tdata (abfd)->dwarf2_find_line_info);
5295 return found;
5296 }
5297
5298 /* Adjust a symbol defined by a dynamic object and referenced by a
5299 regular object. The current definition is in some section of the
5300 dynamic object, but we're not including those sections. We have to
5301 change the definition to something the rest of the link can
5302 understand. */
5303
5304 static bfd_boolean
elf32_arm_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)5305 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
5306 struct elf_link_hash_entry * h)
5307 {
5308 bfd * dynobj;
5309 asection * s;
5310 unsigned int power_of_two;
5311 struct elf32_arm_link_hash_entry * eh;
5312 struct elf32_arm_link_hash_table *globals;
5313
5314 globals = elf32_arm_hash_table (info);
5315 dynobj = elf_hash_table (info)->dynobj;
5316
5317 /* Make sure we know what is going on here. */
5318 BFD_ASSERT (dynobj != NULL
5319 && (h->needs_plt
5320 || h->u.weakdef != NULL
5321 || (h->def_dynamic
5322 && h->ref_regular
5323 && !h->def_regular)));
5324
5325 eh = (struct elf32_arm_link_hash_entry *) h;
5326
5327 /* If this is a function, put it in the procedure linkage table. We
5328 will fill in the contents of the procedure linkage table later,
5329 when we know the address of the .got section. */
5330 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
5331 || h->needs_plt)
5332 {
5333 if (h->plt.refcount <= 0
5334 || SYMBOL_CALLS_LOCAL (info, h)
5335 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5336 && h->root.type == bfd_link_hash_undefweak))
5337 {
5338 /* This case can occur if we saw a PLT32 reloc in an input
5339 file, but the symbol was never referred to by a dynamic
5340 object, or if all references were garbage collected. In
5341 such a case, we don't actually need to build a procedure
5342 linkage table, and we can just do a PC24 reloc instead. */
5343 h->plt.offset = (bfd_vma) -1;
5344 eh->plt_thumb_refcount = 0;
5345 h->needs_plt = 0;
5346 }
5347
5348 return TRUE;
5349 }
5350 else
5351 {
5352 /* It's possible that we incorrectly decided a .plt reloc was
5353 needed for an R_ARM_PC24 or similar reloc to a non-function sym
5354 in check_relocs. We can't decide accurately between function
5355 and non-function syms in check-relocs; Objects loaded later in
5356 the link may change h->type. So fix it now. */
5357 h->plt.offset = (bfd_vma) -1;
5358 eh->plt_thumb_refcount = 0;
5359 }
5360
5361 /* If this is a weak symbol, and there is a real definition, the
5362 processor independent code will have arranged for us to see the
5363 real definition first, and we can just use the same value. */
5364 if (h->u.weakdef != NULL)
5365 {
5366 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5367 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5368 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5369 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5370 return TRUE;
5371 }
5372
5373 /* If there are no non-GOT references, we do not need a copy
5374 relocation. */
5375 if (!h->non_got_ref)
5376 return TRUE;
5377
5378 /* This is a reference to a symbol defined by a dynamic object which
5379 is not a function. */
5380
5381 /* If we are creating a shared library, we must presume that the
5382 only references to the symbol are via the global offset table.
5383 For such cases we need not do anything here; the relocations will
5384 be handled correctly by relocate_section. Relocatable executables
5385 can reference data in shared objects directly, so we don't need to
5386 do anything here. */
5387 if (info->shared || globals->root.is_relocatable_executable)
5388 return TRUE;
5389
5390 /* We must allocate the symbol in our .dynbss section, which will
5391 become part of the .bss section of the executable. There will be
5392 an entry for this symbol in the .dynsym section. The dynamic
5393 object will contain position independent code, so all references
5394 from the dynamic object to this symbol will go through the global
5395 offset table. The dynamic linker will use the .dynsym entry to
5396 determine the address it must put in the global offset table, so
5397 both the dynamic object and the regular object will refer to the
5398 same memory location for the variable. */
5399 s = bfd_get_section_by_name (dynobj, ".dynbss");
5400 BFD_ASSERT (s != NULL);
5401
5402 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
5403 copy the initial value out of the dynamic object and into the
5404 runtime process image. We need to remember the offset into the
5405 .rel.bss section we are going to use. */
5406 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5407 {
5408 asection *srel;
5409
5410 srel = bfd_get_section_by_name (dynobj, ".rel.bss");
5411 BFD_ASSERT (srel != NULL);
5412 srel->size += sizeof (Elf32_External_Rel);
5413 h->needs_copy = 1;
5414 }
5415
5416 /* We need to figure out the alignment required for this symbol. I
5417 have no idea how ELF linkers handle this. */
5418 power_of_two = bfd_log2 (h->size);
5419 if (power_of_two > 3)
5420 power_of_two = 3;
5421
5422 /* Apply the required alignment. */
5423 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5424 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5425 {
5426 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
5427 return FALSE;
5428 }
5429
5430 /* Define the symbol as being at this point in the section. */
5431 h->root.u.def.section = s;
5432 h->root.u.def.value = s->size;
5433
5434 /* Increment the section size to make room for the symbol. */
5435 s->size += h->size;
5436
5437 return TRUE;
5438 }
5439
5440 /* Allocate space in .plt, .got and associated reloc sections for
5441 dynamic relocs. */
5442
5443 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)5444 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
5445 {
5446 struct bfd_link_info *info;
5447 struct elf32_arm_link_hash_table *htab;
5448 struct elf32_arm_link_hash_entry *eh;
5449 struct elf32_arm_relocs_copied *p;
5450
5451 eh = (struct elf32_arm_link_hash_entry *) h;
5452
5453 if (h->root.type == bfd_link_hash_indirect)
5454 return TRUE;
5455
5456 if (h->root.type == bfd_link_hash_warning)
5457 /* When warning symbols are created, they **replace** the "real"
5458 entry in the hash table, thus we never get to see the real
5459 symbol in a hash traversal. So look at it now. */
5460 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5461
5462 info = (struct bfd_link_info *) inf;
5463 htab = elf32_arm_hash_table (info);
5464
5465 if (htab->root.dynamic_sections_created
5466 && h->plt.refcount > 0)
5467 {
5468 /* Make sure this symbol is output as a dynamic symbol.
5469 Undefined weak syms won't yet be marked as dynamic. */
5470 if (h->dynindx == -1
5471 && !h->forced_local)
5472 {
5473 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5474 return FALSE;
5475 }
5476
5477 if (info->shared
5478 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5479 {
5480 asection *s = htab->splt;
5481
5482 /* If this is the first .plt entry, make room for the special
5483 first entry. */
5484 if (s->size == 0)
5485 s->size += htab->plt_header_size;
5486
5487 h->plt.offset = s->size;
5488
5489 /* If we will insert a Thumb trampoline before this PLT, leave room
5490 for it. */
5491 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
5492 {
5493 h->plt.offset += PLT_THUMB_STUB_SIZE;
5494 s->size += PLT_THUMB_STUB_SIZE;
5495 }
5496
5497 /* If this symbol is not defined in a regular file, and we are
5498 not generating a shared library, then set the symbol to this
5499 location in the .plt. This is required to make function
5500 pointers compare as equal between the normal executable and
5501 the shared library. */
5502 if (! info->shared
5503 && !h->def_regular)
5504 {
5505 h->root.u.def.section = s;
5506 h->root.u.def.value = h->plt.offset;
5507
5508 /* Make sure the function is not marked as Thumb, in case
5509 it is the target of an ABS32 relocation, which will
5510 point to the PLT entry. */
5511 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
5512 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
5513 }
5514
5515 /* Make room for this entry. */
5516 s->size += htab->plt_entry_size;
5517
5518 if (!htab->symbian_p)
5519 {
5520 /* We also need to make an entry in the .got.plt section, which
5521 will be placed in the .got section by the linker script. */
5522 eh->plt_got_offset = htab->sgotplt->size;
5523 htab->sgotplt->size += 4;
5524 }
5525
5526 /* We also need to make an entry in the .rel.plt section. */
5527 htab->srelplt->size += sizeof (Elf32_External_Rel);
5528 }
5529 else
5530 {
5531 h->plt.offset = (bfd_vma) -1;
5532 h->needs_plt = 0;
5533 }
5534 }
5535 else
5536 {
5537 h->plt.offset = (bfd_vma) -1;
5538 h->needs_plt = 0;
5539 }
5540
5541 if (h->got.refcount > 0)
5542 {
5543 asection *s;
5544 bfd_boolean dyn;
5545 int tls_type = elf32_arm_hash_entry (h)->tls_type;
5546 int indx;
5547
5548 /* Make sure this symbol is output as a dynamic symbol.
5549 Undefined weak syms won't yet be marked as dynamic. */
5550 if (h->dynindx == -1
5551 && !h->forced_local)
5552 {
5553 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5554 return FALSE;
5555 }
5556
5557 if (!htab->symbian_p)
5558 {
5559 s = htab->sgot;
5560 h->got.offset = s->size;
5561
5562 if (tls_type == GOT_UNKNOWN)
5563 abort ();
5564
5565 if (tls_type == GOT_NORMAL)
5566 /* Non-TLS symbols need one GOT slot. */
5567 s->size += 4;
5568 else
5569 {
5570 if (tls_type & GOT_TLS_GD)
5571 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
5572 s->size += 8;
5573 if (tls_type & GOT_TLS_IE)
5574 /* R_ARM_TLS_IE32 needs one GOT slot. */
5575 s->size += 4;
5576 }
5577
5578 dyn = htab->root.dynamic_sections_created;
5579
5580 indx = 0;
5581 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5582 && (!info->shared
5583 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5584 indx = h->dynindx;
5585
5586 if (tls_type != GOT_NORMAL
5587 && (info->shared || indx != 0)
5588 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5589 || h->root.type != bfd_link_hash_undefweak))
5590 {
5591 if (tls_type & GOT_TLS_IE)
5592 htab->srelgot->size += sizeof (Elf32_External_Rel);
5593
5594 if (tls_type & GOT_TLS_GD)
5595 htab->srelgot->size += sizeof (Elf32_External_Rel);
5596
5597 if ((tls_type & GOT_TLS_GD) && indx != 0)
5598 htab->srelgot->size += sizeof (Elf32_External_Rel);
5599 }
5600 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5601 || h->root.type != bfd_link_hash_undefweak)
5602 && (info->shared
5603 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5604 htab->srelgot->size += sizeof (Elf32_External_Rel);
5605 }
5606 }
5607 else
5608 h->got.offset = (bfd_vma) -1;
5609
5610 if (eh->relocs_copied == NULL)
5611 return TRUE;
5612
5613 /* In the shared -Bsymbolic case, discard space allocated for
5614 dynamic pc-relative relocs against symbols which turn out to be
5615 defined in regular objects. For the normal shared case, discard
5616 space for pc-relative relocs that have become local due to symbol
5617 visibility changes. */
5618
5619 if (info->shared || htab->root.is_relocatable_executable)
5620 {
5621 /* The only reloc that uses pc_count is R_ARM_REL32, which will
5622 appear on something like ".long foo - .". We want calls to
5623 protected symbols to resolve directly to the function rather
5624 than going via the plt. If people want function pointer
5625 comparisons to work as expected then they should avoid
5626 writing assembly like ".long foo - .". */
5627 if (SYMBOL_CALLS_LOCAL (info, h))
5628 {
5629 struct elf32_arm_relocs_copied **pp;
5630
5631 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
5632 {
5633 p->count -= p->pc_count;
5634 p->pc_count = 0;
5635 if (p->count == 0)
5636 *pp = p->next;
5637 else
5638 pp = &p->next;
5639 }
5640 }
5641
5642 /* Also discard relocs on undefined weak syms with non-default
5643 visibility. */
5644 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5645 && h->root.type == bfd_link_hash_undefweak)
5646 eh->relocs_copied = NULL;
5647 else if (htab->root.is_relocatable_executable && h->dynindx == -1
5648 && h->root.type == bfd_link_hash_new)
5649 {
5650 /* Output absolute symbols so that we can create relocations
5651 against them. For normal symbols we output a relocation
5652 against the section that contains them. */
5653 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5654 return FALSE;
5655 }
5656
5657 }
5658 else
5659 {
5660 /* For the non-shared case, discard space for relocs against
5661 symbols which turn out to need copy relocs or are not
5662 dynamic. */
5663
5664 if (!h->non_got_ref
5665 && ((h->def_dynamic
5666 && !h->def_regular)
5667 || (htab->root.dynamic_sections_created
5668 && (h->root.type == bfd_link_hash_undefweak
5669 || h->root.type == bfd_link_hash_undefined))))
5670 {
5671 /* Make sure this symbol is output as a dynamic symbol.
5672 Undefined weak syms won't yet be marked as dynamic. */
5673 if (h->dynindx == -1
5674 && !h->forced_local)
5675 {
5676 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5677 return FALSE;
5678 }
5679
5680 /* If that succeeded, we know we'll be keeping all the
5681 relocs. */
5682 if (h->dynindx != -1)
5683 goto keep;
5684 }
5685
5686 eh->relocs_copied = NULL;
5687
5688 keep: ;
5689 }
5690
5691 /* Finally, allocate space. */
5692 for (p = eh->relocs_copied; p != NULL; p = p->next)
5693 {
5694 asection *sreloc = elf_section_data (p->section)->sreloc;
5695 sreloc->size += p->count * sizeof (Elf32_External_Rel);
5696 }
5697
5698 return TRUE;
5699 }
5700
5701 /* Find any dynamic relocs that apply to read-only sections. */
5702
5703 static bfd_boolean
elf32_arm_readonly_dynrelocs(struct elf_link_hash_entry * h,PTR inf)5704 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5705 {
5706 struct elf32_arm_link_hash_entry *eh;
5707 struct elf32_arm_relocs_copied *p;
5708
5709 if (h->root.type == bfd_link_hash_warning)
5710 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5711
5712 eh = (struct elf32_arm_link_hash_entry *) h;
5713 for (p = eh->relocs_copied; p != NULL; p = p->next)
5714 {
5715 asection *s = p->section;
5716
5717 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5718 {
5719 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5720
5721 info->flags |= DF_TEXTREL;
5722
5723 /* Not an error, just cut short the traversal. */
5724 return FALSE;
5725 }
5726 }
5727 return TRUE;
5728 }
5729
5730 /* Set the sizes of the dynamic sections. */
5731
5732 static bfd_boolean
elf32_arm_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)5733 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5734 struct bfd_link_info * info)
5735 {
5736 bfd * dynobj;
5737 asection * s;
5738 bfd_boolean plt;
5739 bfd_boolean relocs;
5740 bfd *ibfd;
5741 struct elf32_arm_link_hash_table *htab;
5742
5743 htab = elf32_arm_hash_table (info);
5744 dynobj = elf_hash_table (info)->dynobj;
5745 BFD_ASSERT (dynobj != NULL);
5746
5747 if (elf_hash_table (info)->dynamic_sections_created)
5748 {
5749 /* Set the contents of the .interp section to the interpreter. */
5750 if (info->executable)
5751 {
5752 s = bfd_get_section_by_name (dynobj, ".interp");
5753 BFD_ASSERT (s != NULL);
5754 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5755 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5756 }
5757 }
5758
5759 /* Set up .got offsets for local syms, and space for local dynamic
5760 relocs. */
5761 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5762 {
5763 bfd_signed_vma *local_got;
5764 bfd_signed_vma *end_local_got;
5765 char *local_tls_type;
5766 bfd_size_type locsymcount;
5767 Elf_Internal_Shdr *symtab_hdr;
5768 asection *srel;
5769
5770 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5771 continue;
5772
5773 for (s = ibfd->sections; s != NULL; s = s->next)
5774 {
5775 struct elf32_arm_relocs_copied *p;
5776
5777 for (p = *((struct elf32_arm_relocs_copied **)
5778 &elf_section_data (s)->local_dynrel);
5779 p != NULL;
5780 p = p->next)
5781 {
5782 if (!bfd_is_abs_section (p->section)
5783 && bfd_is_abs_section (p->section->output_section))
5784 {
5785 /* Input section has been discarded, either because
5786 it is a copy of a linkonce section or due to
5787 linker script /DISCARD/, so we'll be discarding
5788 the relocs too. */
5789 }
5790 else if (p->count != 0)
5791 {
5792 srel = elf_section_data (p->section)->sreloc;
5793 srel->size += p->count * sizeof (Elf32_External_Rel);
5794 if ((p->section->output_section->flags & SEC_READONLY) != 0)
5795 info->flags |= DF_TEXTREL;
5796 }
5797 }
5798 }
5799
5800 local_got = elf_local_got_refcounts (ibfd);
5801 if (!local_got)
5802 continue;
5803
5804 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5805 locsymcount = symtab_hdr->sh_info;
5806 end_local_got = local_got + locsymcount;
5807 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
5808 s = htab->sgot;
5809 srel = htab->srelgot;
5810 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5811 {
5812 if (*local_got > 0)
5813 {
5814 *local_got = s->size;
5815 if (*local_tls_type & GOT_TLS_GD)
5816 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5817 s->size += 8;
5818 if (*local_tls_type & GOT_TLS_IE)
5819 s->size += 4;
5820 if (*local_tls_type == GOT_NORMAL)
5821 s->size += 4;
5822
5823 if (info->shared || *local_tls_type == GOT_TLS_GD)
5824 srel->size += sizeof (Elf32_External_Rel);
5825 }
5826 else
5827 *local_got = (bfd_vma) -1;
5828 }
5829 }
5830
5831 if (htab->tls_ldm_got.refcount > 0)
5832 {
5833 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5834 for R_ARM_TLS_LDM32 relocations. */
5835 htab->tls_ldm_got.offset = htab->sgot->size;
5836 htab->sgot->size += 8;
5837 if (info->shared)
5838 htab->srelgot->size += sizeof (Elf32_External_Rel);
5839 }
5840 else
5841 htab->tls_ldm_got.offset = -1;
5842
5843 /* Allocate global sym .plt and .got entries, and space for global
5844 sym dynamic relocs. */
5845 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5846
5847 /* The check_relocs and adjust_dynamic_symbol entry points have
5848 determined the sizes of the various dynamic sections. Allocate
5849 memory for them. */
5850 plt = FALSE;
5851 relocs = FALSE;
5852 for (s = dynobj->sections; s != NULL; s = s->next)
5853 {
5854 const char * name;
5855 bfd_boolean strip;
5856
5857 if ((s->flags & SEC_LINKER_CREATED) == 0)
5858 continue;
5859
5860 /* It's OK to base decisions on the section name, because none
5861 of the dynobj section names depend upon the input files. */
5862 name = bfd_get_section_name (dynobj, s);
5863
5864 strip = FALSE;
5865
5866 if (strcmp (name, ".plt") == 0)
5867 {
5868 if (s->size == 0)
5869 {
5870 /* Strip this section if we don't need it; see the
5871 comment below. */
5872 strip = TRUE;
5873 }
5874 else
5875 {
5876 /* Remember whether there is a PLT. */
5877 plt = TRUE;
5878 }
5879 }
5880 else if (strncmp (name, ".rel", 4) == 0)
5881 {
5882 if (s->size == 0)
5883 {
5884 /* If we don't need this section, strip it from the
5885 output file. This is mostly to handle .rel.bss and
5886 .rel.plt. We must create both sections in
5887 create_dynamic_sections, because they must be created
5888 before the linker maps input sections to output
5889 sections. The linker does that before
5890 adjust_dynamic_symbol is called, and it is that
5891 function which decides whether anything needs to go
5892 into these sections. */
5893 strip = TRUE;
5894 }
5895 else
5896 {
5897 /* Remember whether there are any reloc sections other
5898 than .rel.plt. */
5899 if (strcmp (name, ".rel.plt") != 0)
5900 relocs = TRUE;
5901
5902 /* We use the reloc_count field as a counter if we need
5903 to copy relocs into the output file. */
5904 s->reloc_count = 0;
5905 }
5906 }
5907 else if (strncmp (name, ".got", 4) != 0)
5908 {
5909 /* It's not one of our sections, so don't allocate space. */
5910 continue;
5911 }
5912
5913 if (strip)
5914 {
5915 s->flags |= SEC_EXCLUDE;
5916 continue;
5917 }
5918
5919 /* Allocate memory for the section contents. */
5920 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5921 if (s->contents == NULL && s->size != 0)
5922 return FALSE;
5923 }
5924
5925 if (elf_hash_table (info)->dynamic_sections_created)
5926 {
5927 /* Add some entries to the .dynamic section. We fill in the
5928 values later, in elf32_arm_finish_dynamic_sections, but we
5929 must add the entries now so that we get the correct size for
5930 the .dynamic section. The DT_DEBUG entry is filled in by the
5931 dynamic linker and used by the debugger. */
5932 #define add_dynamic_entry(TAG, VAL) \
5933 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5934
5935 if (info->executable)
5936 {
5937 if (!add_dynamic_entry (DT_DEBUG, 0))
5938 return FALSE;
5939 }
5940
5941 if (plt)
5942 {
5943 if ( !add_dynamic_entry (DT_PLTGOT, 0)
5944 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5945 || !add_dynamic_entry (DT_PLTREL, DT_REL)
5946 || !add_dynamic_entry (DT_JMPREL, 0))
5947 return FALSE;
5948 }
5949
5950 if (relocs)
5951 {
5952 if ( !add_dynamic_entry (DT_REL, 0)
5953 || !add_dynamic_entry (DT_RELSZ, 0)
5954 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
5955 return FALSE;
5956 }
5957
5958 /* If any dynamic relocs apply to a read-only section,
5959 then we need a DT_TEXTREL entry. */
5960 if ((info->flags & DF_TEXTREL) == 0)
5961 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
5962 (PTR) info);
5963
5964 if ((info->flags & DF_TEXTREL) != 0)
5965 {
5966 if (!add_dynamic_entry (DT_TEXTREL, 0))
5967 return FALSE;
5968 }
5969 }
5970 #undef add_dynamic_entry
5971
5972 return TRUE;
5973 }
5974
5975 /* Finish up dynamic symbol handling. We set the contents of various
5976 dynamic sections here. */
5977
5978 static bfd_boolean
elf32_arm_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)5979 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
5980 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
5981 {
5982 bfd * dynobj;
5983 struct elf32_arm_link_hash_table *htab;
5984 struct elf32_arm_link_hash_entry *eh;
5985
5986 dynobj = elf_hash_table (info)->dynobj;
5987 htab = elf32_arm_hash_table (info);
5988 eh = (struct elf32_arm_link_hash_entry *) h;
5989
5990 if (h->plt.offset != (bfd_vma) -1)
5991 {
5992 asection * splt;
5993 asection * srel;
5994 bfd_byte *loc;
5995 bfd_vma plt_index;
5996 Elf_Internal_Rela rel;
5997
5998 /* This symbol has an entry in the procedure linkage table. Set
5999 it up. */
6000
6001 BFD_ASSERT (h->dynindx != -1);
6002
6003 splt = bfd_get_section_by_name (dynobj, ".plt");
6004 srel = bfd_get_section_by_name (dynobj, ".rel.plt");
6005 BFD_ASSERT (splt != NULL && srel != NULL);
6006
6007 /* Fill in the entry in the procedure linkage table. */
6008 if (htab->symbian_p)
6009 {
6010 unsigned i;
6011 for (i = 0; i < htab->plt_entry_size / 4; ++i)
6012 bfd_put_32 (output_bfd,
6013 elf32_arm_symbian_plt_entry[i],
6014 splt->contents + h->plt.offset + 4 * i);
6015
6016 /* Fill in the entry in the .rel.plt section. */
6017 rel.r_offset = (splt->output_section->vma
6018 + splt->output_offset
6019 + h->plt.offset + 4 * (i - 1));
6020 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
6021
6022 /* Get the index in the procedure linkage table which
6023 corresponds to this symbol. This is the index of this symbol
6024 in all the symbols for which we are making plt entries. The
6025 first entry in the procedure linkage table is reserved. */
6026 plt_index = ((h->plt.offset - htab->plt_header_size)
6027 / htab->plt_entry_size);
6028 }
6029 else
6030 {
6031 bfd_vma got_offset;
6032 bfd_vma got_displacement;
6033 asection * sgot;
6034
6035 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
6036 BFD_ASSERT (sgot != NULL);
6037
6038 /* Get the offset into the .got.plt table of the entry that
6039 corresponds to this function. */
6040 got_offset = eh->plt_got_offset;
6041
6042 /* Get the index in the procedure linkage table which
6043 corresponds to this symbol. This is the index of this symbol
6044 in all the symbols for which we are making plt entries. The
6045 first three entries in .got.plt are reserved; after that
6046 symbols appear in the same order as in .plt. */
6047 plt_index = (got_offset - 12) / 4;
6048
6049 /* Calculate the displacement between the PLT slot and the
6050 entry in the GOT. The eight-byte offset accounts for the
6051 value produced by adding to pc in the first instruction
6052 of the PLT stub. */
6053 got_displacement = (sgot->output_section->vma
6054 + sgot->output_offset
6055 + got_offset
6056 - splt->output_section->vma
6057 - splt->output_offset
6058 - h->plt.offset
6059 - 8);
6060
6061 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
6062
6063 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
6064 {
6065 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0],
6066 splt->contents + h->plt.offset - 4);
6067 bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1],
6068 splt->contents + h->plt.offset - 2);
6069 }
6070
6071 bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
6072 splt->contents + h->plt.offset + 0);
6073 bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
6074 splt->contents + h->plt.offset + 4);
6075 bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
6076 splt->contents + h->plt.offset + 8);
6077 #ifdef FOUR_WORD_PLT
6078 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
6079 splt->contents + h->plt.offset + 12);
6080 #endif
6081
6082 /* Fill in the entry in the global offset table. */
6083 bfd_put_32 (output_bfd,
6084 (splt->output_section->vma
6085 + splt->output_offset),
6086 sgot->contents + got_offset);
6087
6088 /* Fill in the entry in the .rel.plt section. */
6089 rel.r_offset = (sgot->output_section->vma
6090 + sgot->output_offset
6091 + got_offset);
6092 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
6093 }
6094
6095 loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
6096 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6097
6098 if (!h->def_regular)
6099 {
6100 /* Mark the symbol as undefined, rather than as defined in
6101 the .plt section. Leave the value alone. */
6102 sym->st_shndx = SHN_UNDEF;
6103 /* If the symbol is weak, we do need to clear the value.
6104 Otherwise, the PLT entry would provide a definition for
6105 the symbol even if the symbol wasn't defined anywhere,
6106 and so the symbol would never be NULL. */
6107 if (!h->ref_regular_nonweak)
6108 sym->st_value = 0;
6109 }
6110 }
6111
6112 if (h->got.offset != (bfd_vma) -1
6113 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
6114 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
6115 {
6116 asection * sgot;
6117 asection * srel;
6118 Elf_Internal_Rela rel;
6119 bfd_byte *loc;
6120
6121 /* This symbol has an entry in the global offset table. Set it
6122 up. */
6123 sgot = bfd_get_section_by_name (dynobj, ".got");
6124 srel = bfd_get_section_by_name (dynobj, ".rel.got");
6125 BFD_ASSERT (sgot != NULL && srel != NULL);
6126
6127 rel.r_offset = (sgot->output_section->vma
6128 + sgot->output_offset
6129 + (h->got.offset &~ (bfd_vma) 1));
6130
6131 /* If this is a static link, or it is a -Bsymbolic link and the
6132 symbol is defined locally or was forced to be local because
6133 of a version file, we just want to emit a RELATIVE reloc.
6134 The entry in the global offset table will already have been
6135 initialized in the relocate_section function. */
6136 if (info->shared
6137 && SYMBOL_REFERENCES_LOCAL (info, h))
6138 {
6139 BFD_ASSERT((h->got.offset & 1) != 0);
6140 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
6141 }
6142 else
6143 {
6144 BFD_ASSERT((h->got.offset & 1) == 0);
6145 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
6146 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
6147 }
6148
6149 loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
6150 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6151 }
6152
6153 if (h->needs_copy)
6154 {
6155 asection * s;
6156 Elf_Internal_Rela rel;
6157 bfd_byte *loc;
6158
6159 /* This symbol needs a copy reloc. Set it up. */
6160 BFD_ASSERT (h->dynindx != -1
6161 && (h->root.type == bfd_link_hash_defined
6162 || h->root.type == bfd_link_hash_defweak));
6163
6164 s = bfd_get_section_by_name (h->root.u.def.section->owner,
6165 ".rel.bss");
6166 BFD_ASSERT (s != NULL);
6167
6168 rel.r_offset = (h->root.u.def.value
6169 + h->root.u.def.section->output_section->vma
6170 + h->root.u.def.section->output_offset);
6171 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
6172 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
6173 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
6174 }
6175
6176 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
6177 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
6178 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
6179 sym->st_shndx = SHN_ABS;
6180
6181 return TRUE;
6182 }
6183
6184 /* Finish up the dynamic sections. */
6185
6186 static bfd_boolean
elf32_arm_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)6187 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
6188 {
6189 bfd * dynobj;
6190 asection * sgot;
6191 asection * sdyn;
6192
6193 dynobj = elf_hash_table (info)->dynobj;
6194
6195 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
6196 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
6197 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6198
6199 if (elf_hash_table (info)->dynamic_sections_created)
6200 {
6201 asection *splt;
6202 Elf32_External_Dyn *dyncon, *dynconend;
6203 struct elf32_arm_link_hash_table *htab;
6204
6205 htab = elf32_arm_hash_table (info);
6206 splt = bfd_get_section_by_name (dynobj, ".plt");
6207 BFD_ASSERT (splt != NULL && sdyn != NULL);
6208
6209 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6210 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6211
6212 for (; dyncon < dynconend; dyncon++)
6213 {
6214 Elf_Internal_Dyn dyn;
6215 const char * name;
6216 asection * s;
6217
6218 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
6219
6220 switch (dyn.d_tag)
6221 {
6222 unsigned int type;
6223
6224 default:
6225 break;
6226
6227 case DT_HASH:
6228 name = ".hash";
6229 goto get_vma_if_bpabi;
6230 case DT_STRTAB:
6231 name = ".dynstr";
6232 goto get_vma_if_bpabi;
6233 case DT_SYMTAB:
6234 name = ".dynsym";
6235 goto get_vma_if_bpabi;
6236 case DT_VERSYM:
6237 name = ".gnu.version";
6238 goto get_vma_if_bpabi;
6239 case DT_VERDEF:
6240 name = ".gnu.version_d";
6241 goto get_vma_if_bpabi;
6242 case DT_VERNEED:
6243 name = ".gnu.version_r";
6244 goto get_vma_if_bpabi;
6245
6246 case DT_PLTGOT:
6247 name = ".got";
6248 goto get_vma;
6249 case DT_JMPREL:
6250 name = ".rel.plt";
6251 get_vma:
6252 s = bfd_get_section_by_name (output_bfd, name);
6253 BFD_ASSERT (s != NULL);
6254 if (!htab->symbian_p)
6255 dyn.d_un.d_ptr = s->vma;
6256 else
6257 /* In the BPABI, tags in the PT_DYNAMIC section point
6258 at the file offset, not the memory address, for the
6259 convenience of the post linker. */
6260 dyn.d_un.d_ptr = s->filepos;
6261 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6262 break;
6263
6264 get_vma_if_bpabi:
6265 if (htab->symbian_p)
6266 goto get_vma;
6267 break;
6268
6269 case DT_PLTRELSZ:
6270 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
6271 BFD_ASSERT (s != NULL);
6272 dyn.d_un.d_val = s->size;
6273 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6274 break;
6275
6276 case DT_RELSZ:
6277 if (!htab->symbian_p)
6278 {
6279 /* My reading of the SVR4 ABI indicates that the
6280 procedure linkage table relocs (DT_JMPREL) should be
6281 included in the overall relocs (DT_REL). This is
6282 what Solaris does. However, UnixWare can not handle
6283 that case. Therefore, we override the DT_RELSZ entry
6284 here to make it not include the JMPREL relocs. Since
6285 the linker script arranges for .rel.plt to follow all
6286 other relocation sections, we don't have to worry
6287 about changing the DT_REL entry. */
6288 s = bfd_get_section_by_name (output_bfd, ".rel.plt");
6289 if (s != NULL)
6290 dyn.d_un.d_val -= s->size;
6291 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6292 break;
6293 }
6294 /* Fall through */
6295
6296 case DT_REL:
6297 case DT_RELA:
6298 case DT_RELASZ:
6299 /* In the BPABI, the DT_REL tag must point at the file
6300 offset, not the VMA, of the first relocation
6301 section. So, we use code similar to that in
6302 elflink.c, but do not check for SHF_ALLOC on the
6303 relcoation section, since relocations sections are
6304 never allocated under the BPABI. The comments above
6305 about Unixware notwithstanding, we include all of the
6306 relocations here. */
6307 if (htab->symbian_p)
6308 {
6309 unsigned int i;
6310 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
6311 ? SHT_REL : SHT_RELA);
6312 dyn.d_un.d_val = 0;
6313 for (i = 1; i < elf_numsections (output_bfd); i++)
6314 {
6315 Elf_Internal_Shdr *hdr
6316 = elf_elfsections (output_bfd)[i];
6317 if (hdr->sh_type == type)
6318 {
6319 if (dyn.d_tag == DT_RELSZ
6320 || dyn.d_tag == DT_RELASZ)
6321 dyn.d_un.d_val += hdr->sh_size;
6322 else if ((ufile_ptr) hdr->sh_offset
6323 <= dyn.d_un.d_val - 1)
6324 dyn.d_un.d_val = hdr->sh_offset;
6325 }
6326 }
6327 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6328 }
6329 break;
6330
6331 /* Set the bottom bit of DT_INIT/FINI if the
6332 corresponding function is Thumb. */
6333 case DT_INIT:
6334 name = info->init_function;
6335 goto get_sym;
6336 case DT_FINI:
6337 name = info->fini_function;
6338 get_sym:
6339 /* If it wasn't set by elf_bfd_final_link
6340 then there is nothing to adjust. */
6341 if (dyn.d_un.d_val != 0)
6342 {
6343 struct elf_link_hash_entry * eh;
6344
6345 eh = elf_link_hash_lookup (elf_hash_table (info), name,
6346 FALSE, FALSE, TRUE);
6347 if (eh != (struct elf_link_hash_entry *) NULL
6348 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
6349 {
6350 dyn.d_un.d_val |= 1;
6351 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6352 }
6353 }
6354 break;
6355 }
6356 }
6357
6358 /* Fill in the first entry in the procedure linkage table. */
6359 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
6360 {
6361 bfd_vma got_displacement;
6362
6363 /* Calculate the displacement between the PLT slot and &GOT[0]. */
6364 got_displacement = (sgot->output_section->vma
6365 + sgot->output_offset
6366 - splt->output_section->vma
6367 - splt->output_offset
6368 - 16);
6369
6370 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
6371 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
6372 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
6373 bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
6374 #ifdef FOUR_WORD_PLT
6375 /* The displacement value goes in the otherwise-unused last word of
6376 the second entry. */
6377 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
6378 #else
6379 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
6380 #endif
6381 }
6382
6383 /* UnixWare sets the entsize of .plt to 4, although that doesn't
6384 really seem like the right value. */
6385 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
6386 }
6387
6388 /* Fill in the first three entries in the global offset table. */
6389 if (sgot)
6390 {
6391 if (sgot->size > 0)
6392 {
6393 if (sdyn == NULL)
6394 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
6395 else
6396 bfd_put_32 (output_bfd,
6397 sdyn->output_section->vma + sdyn->output_offset,
6398 sgot->contents);
6399 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
6400 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
6401 }
6402
6403 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
6404 }
6405
6406 return TRUE;
6407 }
6408
6409 static void
elf32_arm_post_process_headers(bfd * abfd,struct bfd_link_info * link_info ATTRIBUTE_UNUSED)6410 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
6411 {
6412 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
6413 struct elf32_arm_link_hash_table *globals;
6414
6415 i_ehdrp = elf_elfheader (abfd);
6416
6417 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
6418 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
6419 else
6420 i_ehdrp->e_ident[EI_OSABI] = 0;
6421 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
6422
6423 if (link_info)
6424 {
6425 globals = elf32_arm_hash_table (link_info);
6426 if (globals->byteswap_code)
6427 i_ehdrp->e_flags |= EF_ARM_BE8;
6428 }
6429 }
6430
6431 static enum elf_reloc_type_class
elf32_arm_reloc_type_class(const Elf_Internal_Rela * rela)6432 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
6433 {
6434 switch ((int) ELF32_R_TYPE (rela->r_info))
6435 {
6436 case R_ARM_RELATIVE:
6437 return reloc_class_relative;
6438 case R_ARM_JUMP_SLOT:
6439 return reloc_class_plt;
6440 case R_ARM_COPY:
6441 return reloc_class_copy;
6442 default:
6443 return reloc_class_normal;
6444 }
6445 }
6446
6447 /* Set the right machine number for an Arm ELF file. */
6448
6449 static bfd_boolean
elf32_arm_section_flags(flagword * flags,const Elf_Internal_Shdr * hdr)6450 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
6451 {
6452 if (hdr->sh_type == SHT_NOTE)
6453 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
6454
6455 return TRUE;
6456 }
6457
6458 static void
elf32_arm_final_write_processing(bfd * abfd,bfd_boolean linker ATTRIBUTE_UNUSED)6459 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
6460 {
6461 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
6462 }
6463
6464 /* Return TRUE if this is an unwinding table entry. */
6465
6466 static bfd_boolean
is_arm_elf_unwind_section_name(bfd * abfd ATTRIBUTE_UNUSED,const char * name)6467 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
6468 {
6469 size_t len1, len2;
6470
6471 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
6472 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
6473 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
6474 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
6475 }
6476
6477
6478 /* Set the type and flags for an ARM section. We do this by
6479 the section name, which is a hack, but ought to work. */
6480
6481 static bfd_boolean
elf32_arm_fake_sections(bfd * abfd,Elf_Internal_Shdr * hdr,asection * sec)6482 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
6483 {
6484 const char * name;
6485
6486 name = bfd_get_section_name (abfd, sec);
6487
6488 if (is_arm_elf_unwind_section_name (abfd, name))
6489 {
6490 hdr->sh_type = SHT_ARM_EXIDX;
6491 hdr->sh_flags |= SHF_LINK_ORDER;
6492 }
6493 return TRUE;
6494 }
6495
6496 /* Handle an ARM specific section when reading an object file. This is
6497 called when bfd_section_from_shdr finds a section with an unknown
6498 type. */
6499
6500 static bfd_boolean
elf32_arm_section_from_shdr(bfd * abfd,Elf_Internal_Shdr * hdr,const char * name,int shindex)6501 elf32_arm_section_from_shdr (bfd *abfd,
6502 Elf_Internal_Shdr * hdr,
6503 const char *name,
6504 int shindex)
6505 {
6506 /* There ought to be a place to keep ELF backend specific flags, but
6507 at the moment there isn't one. We just keep track of the
6508 sections by their name, instead. Fortunately, the ABI gives
6509 names for all the ARM specific sections, so we will probably get
6510 away with this. */
6511 switch (hdr->sh_type)
6512 {
6513 case SHT_ARM_EXIDX:
6514 break;
6515
6516 default:
6517 return FALSE;
6518 }
6519
6520 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6521 return FALSE;
6522
6523 return TRUE;
6524 }
6525
6526 /* Called for each symbol. Builds a section map based on mapping symbols.
6527 Does not alter any of the symbols. */
6528
6529 static bfd_boolean
elf32_arm_output_symbol_hook(struct bfd_link_info * info,const char * name,Elf_Internal_Sym * elfsym,asection * input_sec,struct elf_link_hash_entry * h ATTRIBUTE_UNUSED)6530 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
6531 const char *name,
6532 Elf_Internal_Sym *elfsym,
6533 asection *input_sec,
6534 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
6535 {
6536 int mapcount;
6537 elf32_arm_section_map *map;
6538 struct elf32_arm_link_hash_table *globals;
6539
6540 /* Only do this on final link. */
6541 if (info->relocatable)
6542 return TRUE;
6543
6544 /* Only build a map if we need to byteswap code. */
6545 globals = elf32_arm_hash_table (info);
6546 if (!globals->byteswap_code)
6547 return TRUE;
6548
6549 /* We only want mapping symbols. */
6550 if (! bfd_is_arm_mapping_symbol_name (name))
6551 return TRUE;
6552
6553 mapcount = ++(elf32_arm_section_data (input_sec)->mapcount);
6554 map = elf32_arm_section_data (input_sec)->map;
6555 /* TODO: This may be inefficient, but we probably don't usually have many
6556 mapping symbols per section. */
6557 map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map));
6558 elf32_arm_section_data (input_sec)->map = map;
6559
6560 map[mapcount - 1].vma = elfsym->st_value;
6561 map[mapcount - 1].type = name[1];
6562 return TRUE;
6563 }
6564
6565
6566 /* Allocate target specific section data. */
6567
6568 static bfd_boolean
elf32_arm_new_section_hook(bfd * abfd,asection * sec)6569 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
6570 {
6571 struct _arm_elf_section_data *sdata;
6572 bfd_size_type amt = sizeof (*sdata);
6573
6574 sdata = bfd_zalloc (abfd, amt);
6575 if (sdata == NULL)
6576 return FALSE;
6577 sec->used_by_bfd = sdata;
6578
6579 return _bfd_elf_new_section_hook (abfd, sec);
6580 }
6581
6582
6583 /* Used to order a list of mapping symbols by address. */
6584
6585 static int
elf32_arm_compare_mapping(const void * a,const void * b)6586 elf32_arm_compare_mapping (const void * a, const void * b)
6587 {
6588 return ((const elf32_arm_section_map *) a)->vma
6589 > ((const elf32_arm_section_map *) b)->vma;
6590 }
6591
6592
6593 /* Do code byteswapping. Return FALSE afterwards so that the section is
6594 written out as normal. */
6595
6596 static bfd_boolean
elf32_arm_write_section(bfd * output_bfd ATTRIBUTE_UNUSED,asection * sec,bfd_byte * contents)6597 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
6598 bfd_byte *contents)
6599 {
6600 int mapcount;
6601 elf32_arm_section_map *map;
6602 bfd_vma ptr;
6603 bfd_vma end;
6604 bfd_vma offset;
6605 bfd_byte tmp;
6606 int i;
6607
6608 mapcount = elf32_arm_section_data (sec)->mapcount;
6609 map = elf32_arm_section_data (sec)->map;
6610
6611 if (mapcount == 0)
6612 return FALSE;
6613
6614 qsort (map, mapcount, sizeof (elf32_arm_section_map),
6615 elf32_arm_compare_mapping);
6616
6617 offset = sec->output_section->vma + sec->output_offset;
6618 ptr = map[0].vma - offset;
6619 for (i = 0; i < mapcount; i++)
6620 {
6621 if (i == mapcount - 1)
6622 end = sec->size;
6623 else
6624 end = map[i + 1].vma - offset;
6625
6626 switch (map[i].type)
6627 {
6628 case 'a':
6629 /* Byte swap code words. */
6630 while (ptr + 3 < end)
6631 {
6632 tmp = contents[ptr];
6633 contents[ptr] = contents[ptr + 3];
6634 contents[ptr + 3] = tmp;
6635 tmp = contents[ptr + 1];
6636 contents[ptr + 1] = contents[ptr + 2];
6637 contents[ptr + 2] = tmp;
6638 ptr += 4;
6639 }
6640 break;
6641
6642 case 't':
6643 /* Byte swap code halfwords. */
6644 while (ptr + 1 < end)
6645 {
6646 tmp = contents[ptr];
6647 contents[ptr] = contents[ptr + 1];
6648 contents[ptr + 1] = tmp;
6649 ptr += 2;
6650 }
6651 break;
6652
6653 case 'd':
6654 /* Leave data alone. */
6655 break;
6656 }
6657 ptr = end;
6658 }
6659 free (map);
6660 return FALSE;
6661 }
6662
6663 /* Display STT_ARM_TFUNC symbols as functions. */
6664
6665 static void
elf32_arm_symbol_processing(bfd * abfd ATTRIBUTE_UNUSED,asymbol * asym)6666 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6667 asymbol *asym)
6668 {
6669 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6670
6671 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
6672 elfsym->symbol.flags |= BSF_FUNCTION;
6673 }
6674
6675
6676 /* Mangle thumb function symbols as we read them in. */
6677
6678 static void
elf32_arm_swap_symbol_in(bfd * abfd,const void * psrc,const void * pshn,Elf_Internal_Sym * dst)6679 elf32_arm_swap_symbol_in (bfd * abfd,
6680 const void *psrc,
6681 const void *pshn,
6682 Elf_Internal_Sym *dst)
6683 {
6684 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
6685
6686 /* New EABI objects mark thumb function symbols by setting the low bit of
6687 the address. Turn these into STT_ARM_TFUNC. */
6688 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
6689 && (dst->st_value & 1))
6690 {
6691 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
6692 dst->st_value &= ~(bfd_vma) 1;
6693 }
6694 }
6695
6696
6697 /* Mangle thumb function symbols as we write them out. */
6698
6699 static void
elf32_arm_swap_symbol_out(bfd * abfd,const Elf_Internal_Sym * src,void * cdst,void * shndx)6700 elf32_arm_swap_symbol_out (bfd *abfd,
6701 const Elf_Internal_Sym *src,
6702 void *cdst,
6703 void *shndx)
6704 {
6705 Elf_Internal_Sym newsym;
6706
6707 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
6708 of the address set, as per the new EABI. We do this unconditionally
6709 because objcopy does not set the elf header flags until after
6710 it writes out the symbol table. */
6711 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
6712 {
6713 newsym = *src;
6714 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
6715 newsym.st_value |= 1;
6716
6717 src = &newsym;
6718 }
6719 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
6720 }
6721
6722 /* Add the PT_ARM_EXIDX program header. */
6723
6724 static bfd_boolean
elf32_arm_modify_segment_map(bfd * abfd,struct bfd_link_info * info ATTRIBUTE_UNUSED)6725 elf32_arm_modify_segment_map (bfd *abfd,
6726 struct bfd_link_info *info ATTRIBUTE_UNUSED)
6727 {
6728 struct elf_segment_map *m;
6729 asection *sec;
6730
6731 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6732 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6733 {
6734 /* If there is already a PT_ARM_EXIDX header, then we do not
6735 want to add another one. This situation arises when running
6736 "strip"; the input binary already has the header. */
6737 m = elf_tdata (abfd)->segment_map;
6738 while (m && m->p_type != PT_ARM_EXIDX)
6739 m = m->next;
6740 if (!m)
6741 {
6742 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
6743 if (m == NULL)
6744 return FALSE;
6745 m->p_type = PT_ARM_EXIDX;
6746 m->count = 1;
6747 m->sections[0] = sec;
6748
6749 m->next = elf_tdata (abfd)->segment_map;
6750 elf_tdata (abfd)->segment_map = m;
6751 }
6752 }
6753
6754 return TRUE;
6755 }
6756
6757 /* We may add a PT_ARM_EXIDX program header. */
6758
6759 static int
elf32_arm_additional_program_headers(bfd * abfd)6760 elf32_arm_additional_program_headers (bfd *abfd)
6761 {
6762 asection *sec;
6763
6764 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
6765 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
6766 return 1;
6767 else
6768 return 0;
6769 }
6770
6771 /* We use this to override swap_symbol_in and swap_symbol_out. */
6772 const struct elf_size_info elf32_arm_size_info = {
6773 sizeof (Elf32_External_Ehdr),
6774 sizeof (Elf32_External_Phdr),
6775 sizeof (Elf32_External_Shdr),
6776 sizeof (Elf32_External_Rel),
6777 sizeof (Elf32_External_Rela),
6778 sizeof (Elf32_External_Sym),
6779 sizeof (Elf32_External_Dyn),
6780 sizeof (Elf_External_Note),
6781 4,
6782 1,
6783 32, 2,
6784 ELFCLASS32, EV_CURRENT,
6785 bfd_elf32_write_out_phdrs,
6786 bfd_elf32_write_shdrs_and_ehdr,
6787 bfd_elf32_write_relocs,
6788 elf32_arm_swap_symbol_in,
6789 elf32_arm_swap_symbol_out,
6790 bfd_elf32_slurp_reloc_table,
6791 bfd_elf32_slurp_symbol_table,
6792 bfd_elf32_swap_dyn_in,
6793 bfd_elf32_swap_dyn_out,
6794 bfd_elf32_swap_reloc_in,
6795 bfd_elf32_swap_reloc_out,
6796 bfd_elf32_swap_reloca_in,
6797 bfd_elf32_swap_reloca_out
6798 };
6799
6800 #define ELF_ARCH bfd_arch_arm
6801 #define ELF_MACHINE_CODE EM_ARM
6802 #ifdef __QNXTARGET__
6803 #define ELF_MAXPAGESIZE 0x1000
6804 #else
6805 #define ELF_MAXPAGESIZE 0x8000
6806 #endif
6807 #define ELF_MINPAGESIZE 0x1000
6808
6809 #define bfd_elf32_mkobject elf32_arm_mkobject
6810
6811 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
6812 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
6813 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
6814 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
6815 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
6816 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
6817 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
6818 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
6819 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
6820 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
6821
6822 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
6823 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
6824 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
6825 #define elf_backend_check_relocs elf32_arm_check_relocs
6826 #define elf_backend_relocate_section elf32_arm_relocate_section
6827 #define elf_backend_write_section elf32_arm_write_section
6828 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
6829 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
6830 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
6831 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
6832 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
6833 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
6834 #define elf_backend_post_process_headers elf32_arm_post_process_headers
6835 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
6836 #define elf_backend_object_p elf32_arm_object_p
6837 #define elf_backend_section_flags elf32_arm_section_flags
6838 #define elf_backend_fake_sections elf32_arm_fake_sections
6839 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
6840 #define elf_backend_final_write_processing elf32_arm_final_write_processing
6841 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
6842 #define elf_backend_symbol_processing elf32_arm_symbol_processing
6843 #define elf_backend_size_info elf32_arm_size_info
6844 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
6845 #define elf_backend_additional_program_headers \
6846 elf32_arm_additional_program_headers
6847
6848 #define elf_backend_can_refcount 1
6849 #define elf_backend_can_gc_sections 1
6850 #define elf_backend_plt_readonly 1
6851 #define elf_backend_want_got_plt 1
6852 #define elf_backend_want_plt_sym 0
6853 #define elf_backend_may_use_rel_p 1
6854 #define elf_backend_may_use_rela_p 0
6855 #define elf_backend_default_use_rela_p 0
6856 #define elf_backend_rela_normal 0
6857
6858 #define elf_backend_got_header_size 12
6859
6860 #include "elf32-target.h"
6861
6862 /* VxWorks Targets */
6863
6864 #undef TARGET_LITTLE_SYM
6865 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
6866 #undef TARGET_LITTLE_NAME
6867 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
6868 #undef TARGET_BIG_SYM
6869 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
6870 #undef TARGET_BIG_NAME
6871 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
6872
6873 /* Like elf32_arm_link_hash_table_create -- but overrides
6874 appropriately for VxWorks. */
6875 static struct bfd_link_hash_table *
elf32_arm_vxworks_link_hash_table_create(bfd * abfd)6876 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
6877 {
6878 struct bfd_link_hash_table *ret;
6879
6880 ret = elf32_arm_link_hash_table_create (abfd);
6881 if (ret)
6882 {
6883 struct elf32_arm_link_hash_table *htab
6884 = (struct elf32_arm_link_hash_table *)ret;
6885 htab->use_rel = 0;
6886 }
6887 return ret;
6888 }
6889
6890 #undef elf32_bed
6891 #define elf32_bed elf32_arm_vxworks_bed
6892
6893 #undef bfd_elf32_bfd_link_hash_table_create
6894 #define bfd_elf32_bfd_link_hash_table_create \
6895 elf32_arm_vxworks_link_hash_table_create
6896
6897 #undef elf_backend_may_use_rel_p
6898 #define elf_backend_may_use_rel_p 0
6899 #undef elf_backend_may_use_rela_p
6900 #define elf_backend_may_use_rela_p 1
6901 #undef elf_backend_default_use_rela_p
6902 #define elf_backend_default_use_rela_p 1
6903 #undef elf_backend_rela_normal
6904 #define elf_backend_rela_normal 1
6905
6906 #include "elf32-target.h"
6907
6908
6909 /* Symbian OS Targets */
6910
6911 #undef TARGET_LITTLE_SYM
6912 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
6913 #undef TARGET_LITTLE_NAME
6914 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
6915 #undef TARGET_BIG_SYM
6916 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
6917 #undef TARGET_BIG_NAME
6918 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
6919
6920 /* Like elf32_arm_link_hash_table_create -- but overrides
6921 appropriately for Symbian OS. */
6922 static struct bfd_link_hash_table *
elf32_arm_symbian_link_hash_table_create(bfd * abfd)6923 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
6924 {
6925 struct bfd_link_hash_table *ret;
6926
6927 ret = elf32_arm_link_hash_table_create (abfd);
6928 if (ret)
6929 {
6930 struct elf32_arm_link_hash_table *htab
6931 = (struct elf32_arm_link_hash_table *)ret;
6932 /* There is no PLT header for Symbian OS. */
6933 htab->plt_header_size = 0;
6934 /* The PLT entries are each three instructions. */
6935 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
6936 htab->symbian_p = 1;
6937 /* Symbian uses armv5t or above, so use_blx is always true. */
6938 htab->use_blx = 1;
6939 htab->root.is_relocatable_executable = 1;
6940 }
6941 return ret;
6942 }
6943
6944 static const struct bfd_elf_special_section
6945 elf32_arm_symbian_special_sections[] =
6946 {
6947 /* In a BPABI executable, the dynamic linking sections do not go in
6948 the loadable read-only segment. The post-linker may wish to
6949 refer to these sections, but they are not part of the final
6950 program image. */
6951 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
6952 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
6953 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
6954 { ".got", 4, 0, SHT_PROGBITS, 0 },
6955 { ".hash", 5, 0, SHT_HASH, 0 },
6956 /* These sections do not need to be writable as the SymbianOS
6957 postlinker will arrange things so that no dynamic relocation is
6958 required. */
6959 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
6960 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
6961 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
6962 { NULL, 0, 0, 0, 0 }
6963 };
6964
6965 static const struct bfd_elf_special_section *
elf32_arm_symbian_get_sec_type_attr(bfd * abfd,asection * sec)6966 elf32_arm_symbian_get_sec_type_attr (bfd *abfd, asection *sec)
6967 {
6968 const struct bfd_elf_special_section *ssect;
6969
6970 /* See if this is one of the special sections. */
6971 if (sec->name == NULL)
6972 return NULL;
6973
6974 ssect = _bfd_elf_get_special_section (sec->name,
6975 elf32_arm_symbian_special_sections,
6976 sec->use_rela_p);
6977 if (ssect != NULL)
6978 return ssect;
6979
6980 return _bfd_elf_get_sec_type_attr (abfd, sec);
6981 }
6982
6983 static void
elf32_arm_symbian_begin_write_processing(bfd * abfd,struct bfd_link_info * link_info ATTRIBUTE_UNUSED)6984 elf32_arm_symbian_begin_write_processing (bfd *abfd,
6985 struct bfd_link_info *link_info
6986 ATTRIBUTE_UNUSED)
6987 {
6988 /* BPABI objects are never loaded directly by an OS kernel; they are
6989 processed by a postlinker first, into an OS-specific format. If
6990 the D_PAGED bit is set on the file, BFD will align segments on
6991 page boundaries, so that an OS can directly map the file. With
6992 BPABI objects, that just results in wasted space. In addition,
6993 because we clear the D_PAGED bit, map_sections_to_segments will
6994 recognize that the program headers should not be mapped into any
6995 loadable segment. */
6996 abfd->flags &= ~D_PAGED;
6997 }
6998
6999 static bfd_boolean
elf32_arm_symbian_modify_segment_map(bfd * abfd,struct bfd_link_info * info)7000 elf32_arm_symbian_modify_segment_map (bfd *abfd,
7001 struct bfd_link_info *info)
7002 {
7003 struct elf_segment_map *m;
7004 asection *dynsec;
7005
7006 /* BPABI shared libraries and executables should have a PT_DYNAMIC
7007 segment. However, because the .dynamic section is not marked
7008 with SEC_LOAD, the generic ELF code will not create such a
7009 segment. */
7010 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
7011 if (dynsec)
7012 {
7013 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
7014 m->next = elf_tdata (abfd)->segment_map;
7015 elf_tdata (abfd)->segment_map = m;
7016 }
7017
7018 /* Also call the generic arm routine. */
7019 return elf32_arm_modify_segment_map (abfd, info);
7020 }
7021
7022 #undef elf32_bed
7023 #define elf32_bed elf32_arm_symbian_bed
7024
7025 /* The dynamic sections are not allocated on SymbianOS; the postlinker
7026 will process them and then discard them. */
7027 #undef ELF_DYNAMIC_SEC_FLAGS
7028 #define ELF_DYNAMIC_SEC_FLAGS \
7029 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
7030
7031 #undef bfd_elf32_bfd_link_hash_table_create
7032 #define bfd_elf32_bfd_link_hash_table_create \
7033 elf32_arm_symbian_link_hash_table_create
7034
7035 #undef elf_backend_get_sec_type_attr
7036 #define elf_backend_get_sec_type_attr elf32_arm_symbian_get_sec_type_attr
7037
7038 #undef elf_backend_begin_write_processing
7039 #define elf_backend_begin_write_processing \
7040 elf32_arm_symbian_begin_write_processing
7041
7042 #undef elf_backend_modify_segment_map
7043 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
7044
7045 /* There is no .got section for BPABI objects, and hence no header. */
7046 #undef elf_backend_got_header_size
7047 #define elf_backend_got_header_size 0
7048
7049 /* Similarly, there is no .got.plt section. */
7050 #undef elf_backend_want_got_plt
7051 #define elf_backend_want_got_plt 0
7052
7053 #undef elf_backend_may_use_rel_p
7054 #define elf_backend_may_use_rel_p 1
7055 #undef elf_backend_may_use_rela_p
7056 #define elf_backend_may_use_rela_p 0
7057 #undef elf_backend_default_use_rela_p
7058 #define elf_backend_default_use_rela_p 0
7059 #undef elf_backend_rela_normal
7060 #define elf_backend_rela_normal 0
7061
7062 #include "elf32-target.h"
7063