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* ldlang.h (lang_input_statement_type): Use bitfields for booleans.
[binutils.git] / bfd / elf32-arm.c
blobae8ef8f70ac1b8f9245bdf9b13c053d42199f029
1 /* 32-bit ELF support for ARM
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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 "bfd.h"
22 #include "sysdep.h"
23 #include "libiberty.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf-vxworks.h"
27 #include "elf/arm.h"
28
29 #ifndef NUM_ELEM
30 #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0]))
31 #endif
32
33 /* Return the relocation section associated with NAME. HTAB is the
34 bfd's elf32_arm_link_hash_entry. */
35 #define RELOC_SECTION(HTAB, NAME) \
36 ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME)
37
38 /* Return size of a relocation entry. HTAB is the bfd's
39 elf32_arm_link_hash_entry. */
40 #define RELOC_SIZE(HTAB) \
41 ((HTAB)->use_rel \
42 ? sizeof (Elf32_External_Rel) \
43 : sizeof (Elf32_External_Rela))
44
45 /* Return function to swap relocations in. HTAB is the bfd's
46 elf32_arm_link_hash_entry. */
47 #define SWAP_RELOC_IN(HTAB) \
48 ((HTAB)->use_rel \
49 ? bfd_elf32_swap_reloc_in \
50 : bfd_elf32_swap_reloca_in)
51
52 /* Return function to swap relocations out. HTAB is the bfd's
53 elf32_arm_link_hash_entry. */
54 #define SWAP_RELOC_OUT(HTAB) \
55 ((HTAB)->use_rel \
56 ? bfd_elf32_swap_reloc_out \
57 : bfd_elf32_swap_reloca_out)
58
59 #define elf_info_to_howto 0
60 #define elf_info_to_howto_rel elf32_arm_info_to_howto
61
62 #define ARM_ELF_ABI_VERSION 0
63 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM
64
65 static struct elf_backend_data elf32_arm_vxworks_bed;
66
67 /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g.
68 R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO
69 in that slot. */
70
71 static reloc_howto_type elf32_arm_howto_table_1[] =
72 {
73 /* No relocation */
74 HOWTO (R_ARM_NONE, /* type */
75 0, /* rightshift */
76 0, /* size (0 = byte, 1 = short, 2 = long) */
77 0, /* bitsize */
78 FALSE, /* pc_relative */
79 0, /* bitpos */
80 complain_overflow_dont,/* complain_on_overflow */
81 bfd_elf_generic_reloc, /* special_function */
82 "R_ARM_NONE", /* name */
83 FALSE, /* partial_inplace */
84 0, /* src_mask */
85 0, /* dst_mask */
86 FALSE), /* pcrel_offset */
87
88 HOWTO (R_ARM_PC24, /* type */
89 2, /* rightshift */
90 2, /* size (0 = byte, 1 = short, 2 = long) */
91 24, /* bitsize */
92 TRUE, /* pc_relative */
93 0, /* bitpos */
94 complain_overflow_signed,/* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_ARM_PC24", /* name */
97 FALSE, /* partial_inplace */
98 0x00ffffff, /* src_mask */
99 0x00ffffff, /* dst_mask */
100 TRUE), /* pcrel_offset */
101
102 /* 32 bit absolute */
103 HOWTO (R_ARM_ABS32, /* type */
104 0, /* rightshift */
105 2, /* size (0 = byte, 1 = short, 2 = long) */
106 32, /* 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_ABS32", /* name */
112 FALSE, /* partial_inplace */
113 0xffffffff, /* src_mask */
114 0xffffffff, /* dst_mask */
115 FALSE), /* pcrel_offset */
116
117 /* standard 32bit pc-relative reloc */
118 HOWTO (R_ARM_REL32, /* type */
119 0, /* rightshift */
120 2, /* size (0 = byte, 1 = short, 2 = long) */
121 32, /* bitsize */
122 TRUE, /* pc_relative */
123 0, /* bitpos */
124 complain_overflow_bitfield,/* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_ARM_REL32", /* name */
127 FALSE, /* partial_inplace */
128 0xffffffff, /* src_mask */
129 0xffffffff, /* dst_mask */
130 TRUE), /* pcrel_offset */
131
132 /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */
133 HOWTO (R_ARM_PC13, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 8, /* 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_PC13", /* name */
142 FALSE, /* partial_inplace */
143 0x000000ff, /* src_mask */
144 0x000000ff, /* dst_mask */
145 FALSE), /* pcrel_offset */
146
147 /* 16 bit absolute */
148 HOWTO (R_ARM_ABS16, /* type */
149 0, /* rightshift */
150 1, /* size (0 = byte, 1 = short, 2 = long) */
151 16, /* bitsize */
152 FALSE, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_bitfield,/* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_ARM_ABS16", /* name */
157 FALSE, /* partial_inplace */
158 0x0000ffff, /* src_mask */
159 0x0000ffff, /* dst_mask */
160 FALSE), /* pcrel_offset */
161
162 /* 12 bit absolute */
163 HOWTO (R_ARM_ABS12, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 12, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield,/* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_ARM_ABS12", /* name */
172 FALSE, /* partial_inplace */
173 0x00000fff, /* src_mask */
174 0x00000fff, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 HOWTO (R_ARM_THM_ABS5, /* type */
178 6, /* rightshift */
179 1, /* size (0 = byte, 1 = short, 2 = long) */
180 5, /* bitsize */
181 FALSE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_bitfield,/* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_ARM_THM_ABS5", /* name */
186 FALSE, /* partial_inplace */
187 0x000007e0, /* src_mask */
188 0x000007e0, /* dst_mask */
189 FALSE), /* pcrel_offset */
190
191 /* 8 bit absolute */
192 HOWTO (R_ARM_ABS8, /* type */
193 0, /* rightshift */
194 0, /* size (0 = byte, 1 = short, 2 = long) */
195 8, /* bitsize */
196 FALSE, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_bitfield,/* complain_on_overflow */
199 bfd_elf_generic_reloc, /* special_function */
200 "R_ARM_ABS8", /* name */
201 FALSE, /* partial_inplace */
202 0x000000ff, /* src_mask */
203 0x000000ff, /* dst_mask */
204 FALSE), /* pcrel_offset */
205
206 HOWTO (R_ARM_SBREL32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont,/* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_ARM_SBREL32", /* name */
215 FALSE, /* partial_inplace */
216 0xffffffff, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* FIXME: Has two more bits of offset in Thumb32. */
221 HOWTO (R_ARM_THM_CALL, /* type */
222 1, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 23, /* bitsize */
225 TRUE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_signed,/* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_ARM_THM_CALL", /* name */
230 FALSE, /* partial_inplace */
231 0x07ff07ff, /* src_mask */
232 0x07ff07ff, /* dst_mask */
233 TRUE), /* pcrel_offset */
234
235 HOWTO (R_ARM_THM_PC8, /* type */
236 1, /* rightshift */
237 1, /* size (0 = byte, 1 = short, 2 = long) */
238 8, /* bitsize */
239 TRUE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_signed,/* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_ARM_THM_PC8", /* name */
244 FALSE, /* partial_inplace */
245 0x000000ff, /* src_mask */
246 0x000000ff, /* dst_mask */
247 TRUE), /* pcrel_offset */
248
249 HOWTO (R_ARM_BREL_ADJ, /* type */
250 1, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 32, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_signed,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_ARM_BREL_ADJ", /* name */
258 FALSE, /* partial_inplace */
259 0xffffffff, /* src_mask */
260 0xffffffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 HOWTO (R_ARM_SWI24, /* type */
264 0, /* rightshift */
265 0, /* size (0 = byte, 1 = short, 2 = long) */
266 0, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_signed,/* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_ARM_SWI24", /* name */
272 FALSE, /* partial_inplace */
273 0x00000000, /* src_mask */
274 0x00000000, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 HOWTO (R_ARM_THM_SWI8, /* type */
278 0, /* rightshift */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_signed,/* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_ARM_SWI8", /* name */
286 FALSE, /* partial_inplace */
287 0x00000000, /* src_mask */
288 0x00000000, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* BLX instruction for the ARM. */
292 HOWTO (R_ARM_XPC25, /* type */
293 2, /* rightshift */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
295 25, /* bitsize */
296 TRUE, /* pc_relative */
297 0, /* bitpos */
298 complain_overflow_signed,/* complain_on_overflow */
299 bfd_elf_generic_reloc, /* special_function */
300 "R_ARM_XPC25", /* name */
301 FALSE, /* partial_inplace */
302 0x00ffffff, /* src_mask */
303 0x00ffffff, /* dst_mask */
304 TRUE), /* pcrel_offset */
305
306 /* BLX instruction for the Thumb. */
307 HOWTO (R_ARM_THM_XPC22, /* type */
308 2, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 22, /* bitsize */
311 TRUE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_signed,/* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_ARM_THM_XPC22", /* name */
316 FALSE, /* partial_inplace */
317 0x07ff07ff, /* src_mask */
318 0x07ff07ff, /* dst_mask */
319 TRUE), /* pcrel_offset */
320
321 /* Dynamic TLS relocations. */
322
323 HOWTO (R_ARM_TLS_DTPMOD32, /* type */
324 0, /* rightshift */
325 2, /* size (0 = byte, 1 = short, 2 = long) */
326 32, /* bitsize */
327 FALSE, /* pc_relative */
328 0, /* bitpos */
329 complain_overflow_bitfield,/* complain_on_overflow */
330 bfd_elf_generic_reloc, /* special_function */
331 "R_ARM_TLS_DTPMOD32", /* name */
332 TRUE, /* partial_inplace */
333 0xffffffff, /* src_mask */
334 0xffffffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
336
337 HOWTO (R_ARM_TLS_DTPOFF32, /* 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_TLS_DTPOFF32", /* name */
346 TRUE, /* partial_inplace */
347 0xffffffff, /* src_mask */
348 0xffffffff, /* dst_mask */
349 FALSE), /* pcrel_offset */
350
351 HOWTO (R_ARM_TLS_TPOFF32, /* 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_TLS_TPOFF32", /* name */
360 TRUE, /* partial_inplace */
361 0xffffffff, /* src_mask */
362 0xffffffff, /* dst_mask */
363 FALSE), /* pcrel_offset */
364
365 /* Relocs used in ARM Linux */
366
367 HOWTO (R_ARM_COPY, /* type */
368 0, /* rightshift */
369 2, /* size (0 = byte, 1 = short, 2 = long) */
370 32, /* bitsize */
371 FALSE, /* pc_relative */
372 0, /* bitpos */
373 complain_overflow_bitfield,/* complain_on_overflow */
374 bfd_elf_generic_reloc, /* special_function */
375 "R_ARM_COPY", /* name */
376 TRUE, /* partial_inplace */
377 0xffffffff, /* src_mask */
378 0xffffffff, /* dst_mask */
379 FALSE), /* pcrel_offset */
380
381 HOWTO (R_ARM_GLOB_DAT, /* type */
382 0, /* rightshift */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
384 32, /* bitsize */
385 FALSE, /* pc_relative */
386 0, /* bitpos */
387 complain_overflow_bitfield,/* complain_on_overflow */
388 bfd_elf_generic_reloc, /* special_function */
389 "R_ARM_GLOB_DAT", /* name */
390 TRUE, /* partial_inplace */
391 0xffffffff, /* src_mask */
392 0xffffffff, /* dst_mask */
393 FALSE), /* pcrel_offset */
394
395 HOWTO (R_ARM_JUMP_SLOT, /* type */
396 0, /* rightshift */
397 2, /* size (0 = byte, 1 = short, 2 = long) */
398 32, /* bitsize */
399 FALSE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_bitfield,/* complain_on_overflow */
402 bfd_elf_generic_reloc, /* special_function */
403 "R_ARM_JUMP_SLOT", /* name */
404 TRUE, /* partial_inplace */
405 0xffffffff, /* src_mask */
406 0xffffffff, /* dst_mask */
407 FALSE), /* pcrel_offset */
408
409 HOWTO (R_ARM_RELATIVE, /* type */
410 0, /* rightshift */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
412 32, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_bitfield,/* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_ARM_RELATIVE", /* name */
418 TRUE, /* partial_inplace */
419 0xffffffff, /* src_mask */
420 0xffffffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 HOWTO (R_ARM_GOTOFF32, /* type */
424 0, /* rightshift */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
426 32, /* bitsize */
427 FALSE, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_bitfield,/* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_ARM_GOTOFF32", /* name */
432 TRUE, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
436
437 HOWTO (R_ARM_GOTPC, /* type */
438 0, /* rightshift */
439 2, /* size (0 = byte, 1 = short, 2 = long) */
440 32, /* bitsize */
441 TRUE, /* pc_relative */
442 0, /* bitpos */
443 complain_overflow_bitfield,/* complain_on_overflow */
444 bfd_elf_generic_reloc, /* special_function */
445 "R_ARM_GOTPC", /* name */
446 TRUE, /* partial_inplace */
447 0xffffffff, /* src_mask */
448 0xffffffff, /* dst_mask */
449 TRUE), /* pcrel_offset */
450
451 HOWTO (R_ARM_GOT32, /* type */
452 0, /* rightshift */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
454 32, /* bitsize */
455 FALSE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_bitfield,/* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 "R_ARM_GOT32", /* name */
460 TRUE, /* partial_inplace */
461 0xffffffff, /* src_mask */
462 0xffffffff, /* dst_mask */
463 FALSE), /* pcrel_offset */
464
465 HOWTO (R_ARM_PLT32, /* type */
466 2, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 24, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_bitfield,/* complain_on_overflow */
472 bfd_elf_generic_reloc, /* special_function */
473 "R_ARM_PLT32", /* name */
474 FALSE, /* partial_inplace */
475 0x00ffffff, /* src_mask */
476 0x00ffffff, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 HOWTO (R_ARM_CALL, /* type */
480 2, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 24, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed,/* complain_on_overflow */
486 bfd_elf_generic_reloc, /* special_function */
487 "R_ARM_CALL", /* name */
488 FALSE, /* partial_inplace */
489 0x00ffffff, /* src_mask */
490 0x00ffffff, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 HOWTO (R_ARM_JUMP24, /* type */
494 2, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 24, /* bitsize */
497 TRUE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_signed,/* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_ARM_JUMP24", /* name */
502 FALSE, /* partial_inplace */
503 0x00ffffff, /* src_mask */
504 0x00ffffff, /* dst_mask */
505 TRUE), /* pcrel_offset */
506
507 HOWTO (R_ARM_THM_JUMP24, /* type */
508 1, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 24, /* bitsize */
511 TRUE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_signed,/* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_ARM_THM_JUMP24", /* name */
516 FALSE, /* partial_inplace */
517 0x07ff2fff, /* src_mask */
518 0x07ff2fff, /* dst_mask */
519 TRUE), /* pcrel_offset */
520
521 HOWTO (R_ARM_BASE_ABS, /* type */
522 0, /* rightshift */
523 2, /* size (0 = byte, 1 = short, 2 = long) */
524 32, /* bitsize */
525 FALSE, /* pc_relative */
526 0, /* bitpos */
527 complain_overflow_dont,/* complain_on_overflow */
528 bfd_elf_generic_reloc, /* special_function */
529 "R_ARM_BASE_ABS", /* name */
530 FALSE, /* partial_inplace */
531 0xffffffff, /* src_mask */
532 0xffffffff, /* dst_mask */
533 FALSE), /* pcrel_offset */
534
535 HOWTO (R_ARM_ALU_PCREL7_0, /* type */
536 0, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 12, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont,/* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_ARM_ALU_PCREL_7_0", /* name */
544 FALSE, /* partial_inplace */
545 0x00000fff, /* src_mask */
546 0x00000fff, /* dst_mask */
547 TRUE), /* pcrel_offset */
548
549 HOWTO (R_ARM_ALU_PCREL15_8, /* type */
550 0, /* rightshift */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
552 12, /* bitsize */
553 TRUE, /* pc_relative */
554 8, /* bitpos */
555 complain_overflow_dont,/* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 "R_ARM_ALU_PCREL_15_8",/* name */
558 FALSE, /* partial_inplace */
559 0x00000fff, /* src_mask */
560 0x00000fff, /* dst_mask */
561 TRUE), /* pcrel_offset */
562
563 HOWTO (R_ARM_ALU_PCREL23_15, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 12, /* bitsize */
567 TRUE, /* pc_relative */
568 16, /* bitpos */
569 complain_overflow_dont,/* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_ARM_ALU_PCREL_23_15",/* name */
572 FALSE, /* partial_inplace */
573 0x00000fff, /* src_mask */
574 0x00000fff, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 HOWTO (R_ARM_LDR_SBREL_11_0, /* type */
578 0, /* rightshift */
579 2, /* size (0 = byte, 1 = short, 2 = long) */
580 12, /* bitsize */
581 FALSE, /* pc_relative */
582 0, /* bitpos */
583 complain_overflow_dont,/* complain_on_overflow */
584 bfd_elf_generic_reloc, /* special_function */
585 "R_ARM_LDR_SBREL_11_0",/* name */
586 FALSE, /* partial_inplace */
587 0x00000fff, /* src_mask */
588 0x00000fff, /* dst_mask */
589 FALSE), /* pcrel_offset */
590
591 HOWTO (R_ARM_ALU_SBREL_19_12, /* type */
592 0, /* rightshift */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
594 8, /* bitsize */
595 FALSE, /* pc_relative */
596 12, /* bitpos */
597 complain_overflow_dont,/* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_ARM_ALU_SBREL_19_12",/* name */
600 FALSE, /* partial_inplace */
601 0x000ff000, /* src_mask */
602 0x000ff000, /* dst_mask */
603 FALSE), /* pcrel_offset */
604
605 HOWTO (R_ARM_ALU_SBREL_27_20, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 8, /* bitsize */
609 FALSE, /* pc_relative */
610 20, /* bitpos */
611 complain_overflow_dont,/* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_ARM_ALU_SBREL_27_20",/* name */
614 FALSE, /* partial_inplace */
615 0x0ff00000, /* src_mask */
616 0x0ff00000, /* dst_mask */
617 FALSE), /* pcrel_offset */
618
619 HOWTO (R_ARM_TARGET1, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont,/* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_ARM_TARGET1", /* name */
628 FALSE, /* partial_inplace */
629 0xffffffff, /* src_mask */
630 0xffffffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 HOWTO (R_ARM_ROSEGREL32, /* type */
634 0, /* rightshift */
635 2, /* size (0 = byte, 1 = short, 2 = long) */
636 32, /* bitsize */
637 FALSE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_dont,/* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
641 "R_ARM_ROSEGREL32", /* name */
642 FALSE, /* partial_inplace */
643 0xffffffff, /* src_mask */
644 0xffffffff, /* dst_mask */
645 FALSE), /* pcrel_offset */
646
647 HOWTO (R_ARM_V4BX, /* type */
648 0, /* rightshift */
649 2, /* size (0 = byte, 1 = short, 2 = long) */
650 32, /* bitsize */
651 FALSE, /* pc_relative */
652 0, /* bitpos */
653 complain_overflow_dont,/* complain_on_overflow */
654 bfd_elf_generic_reloc, /* special_function */
655 "R_ARM_V4BX", /* name */
656 FALSE, /* partial_inplace */
657 0xffffffff, /* src_mask */
658 0xffffffff, /* dst_mask */
659 FALSE), /* pcrel_offset */
660
661 HOWTO (R_ARM_TARGET2, /* type */
662 0, /* rightshift */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
664 32, /* bitsize */
665 FALSE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_signed,/* complain_on_overflow */
668 bfd_elf_generic_reloc, /* special_function */
669 "R_ARM_TARGET2", /* name */
670 FALSE, /* partial_inplace */
671 0xffffffff, /* src_mask */
672 0xffffffff, /* dst_mask */
673 TRUE), /* pcrel_offset */
674
675 HOWTO (R_ARM_PREL31, /* type */
676 0, /* rightshift */
677 2, /* size (0 = byte, 1 = short, 2 = long) */
678 31, /* bitsize */
679 TRUE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed,/* complain_on_overflow */
682 bfd_elf_generic_reloc, /* special_function */
683 "R_ARM_PREL31", /* name */
684 FALSE, /* partial_inplace */
685 0x7fffffff, /* src_mask */
686 0x7fffffff, /* dst_mask */
687 TRUE), /* pcrel_offset */
688
689 HOWTO (R_ARM_MOVW_ABS_NC, /* type */
690 0, /* rightshift */
691 2, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_dont,/* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_ARM_MOVW_ABS_NC", /* name */
698 FALSE, /* partial_inplace */
699 0x0000ffff, /* src_mask */
700 0x0000ffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 HOWTO (R_ARM_MOVT_ABS, /* type */
704 0, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_bitfield,/* complain_on_overflow */
710 bfd_elf_generic_reloc, /* special_function */
711 "R_ARM_MOVT_ABS", /* name */
712 FALSE, /* partial_inplace */
713 0x0000ffff, /* src_mask */
714 0x0000ffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 HOWTO (R_ARM_MOVW_PREL_NC, /* type */
718 0, /* rightshift */
719 2, /* size (0 = byte, 1 = short, 2 = long) */
720 16, /* bitsize */
721 TRUE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_dont,/* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_ARM_MOVW_PREL_NC", /* name */
726 FALSE, /* partial_inplace */
727 0x0000ffff, /* src_mask */
728 0x0000ffff, /* dst_mask */
729 TRUE), /* pcrel_offset */
730
731 HOWTO (R_ARM_MOVT_PREL, /* type */
732 0, /* rightshift */
733 2, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 TRUE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_bitfield,/* complain_on_overflow */
738 bfd_elf_generic_reloc, /* special_function */
739 "R_ARM_MOVT_PREL", /* name */
740 FALSE, /* partial_inplace */
741 0x0000ffff, /* src_mask */
742 0x0000ffff, /* dst_mask */
743 TRUE), /* pcrel_offset */
744
745 HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */
746 0, /* rightshift */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont,/* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 "R_ARM_THM_MOVW_ABS_NC",/* name */
754 FALSE, /* partial_inplace */
755 0x040f70ff, /* src_mask */
756 0x040f70ff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 HOWTO (R_ARM_THM_MOVT_ABS, /* type */
760 0, /* rightshift */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_bitfield,/* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_ARM_THM_MOVT_ABS", /* name */
768 FALSE, /* partial_inplace */
769 0x040f70ff, /* src_mask */
770 0x040f70ff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 16, /* bitsize */
777 TRUE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont,/* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_ARM_THM_MOVW_PREL_NC",/* name */
782 FALSE, /* partial_inplace */
783 0x040f70ff, /* src_mask */
784 0x040f70ff, /* dst_mask */
785 TRUE), /* pcrel_offset */
786
787 HOWTO (R_ARM_THM_MOVT_PREL, /* type */
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 TRUE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_bitfield,/* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_ARM_THM_MOVT_PREL", /* name */
796 FALSE, /* partial_inplace */
797 0x040f70ff, /* src_mask */
798 0x040f70ff, /* dst_mask */
799 TRUE), /* pcrel_offset */
800
801 HOWTO (R_ARM_THM_JUMP19, /* type */
802 1, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 19, /* bitsize */
805 TRUE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_signed,/* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_ARM_THM_JUMP19", /* name */
810 FALSE, /* partial_inplace */
811 0x043f2fff, /* src_mask */
812 0x043f2fff, /* dst_mask */
813 TRUE), /* pcrel_offset */
814
815 HOWTO (R_ARM_THM_JUMP6, /* type */
816 1, /* rightshift */
817 1, /* size (0 = byte, 1 = short, 2 = long) */
818 6, /* bitsize */
819 TRUE, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_unsigned,/* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_ARM_THM_JUMP6", /* name */
824 FALSE, /* partial_inplace */
825 0x02f8, /* src_mask */
826 0x02f8, /* dst_mask */
827 TRUE), /* pcrel_offset */
828
829 /* These are declared as 13-bit signed relocations because we can
830 address -4095 .. 4095(base) by altering ADDW to SUBW or vice
831 versa. */
832 HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */
833 0, /* rightshift */
834 2, /* size (0 = byte, 1 = short, 2 = long) */
835 13, /* bitsize */
836 TRUE, /* pc_relative */
837 0, /* bitpos */
838 complain_overflow_signed,/* complain_on_overflow */
839 bfd_elf_generic_reloc, /* special_function */
840 "R_ARM_THM_ALU_PREL_11_0",/* name */
841 FALSE, /* partial_inplace */
842 0x040070ff, /* src_mask */
843 0x040070ff, /* dst_mask */
844 TRUE), /* pcrel_offset */
845
846 HOWTO (R_ARM_THM_PC12, /* type */
847 0, /* rightshift */
848 2, /* size (0 = byte, 1 = short, 2 = long) */
849 13, /* bitsize */
850 TRUE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_signed,/* complain_on_overflow */
853 bfd_elf_generic_reloc, /* special_function */
854 "R_ARM_THM_PC12", /* name */
855 FALSE, /* partial_inplace */
856 0x040070ff, /* src_mask */
857 0x040070ff, /* dst_mask */
858 TRUE), /* pcrel_offset */
859
860 HOWTO (R_ARM_ABS32_NOI, /* type */
861 0, /* rightshift */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
863 32, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont,/* complain_on_overflow */
867 bfd_elf_generic_reloc, /* special_function */
868 "R_ARM_ABS32_NOI", /* name */
869 FALSE, /* partial_inplace */
870 0xffffffff, /* src_mask */
871 0xffffffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 HOWTO (R_ARM_REL32_NOI, /* type */
875 0, /* rightshift */
876 2, /* size (0 = byte, 1 = short, 2 = long) */
877 32, /* bitsize */
878 TRUE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont,/* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_ARM_REL32_NOI", /* name */
883 FALSE, /* partial_inplace */
884 0xffffffff, /* src_mask */
885 0xffffffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887 };
888
889 /* Relocations 57 .. 83 are the "group relocations" which we do not
890 support. */
891
892 static reloc_howto_type elf32_arm_howto_table_2[] =
893 {
894 HOWTO (R_ARM_MOVW_BREL_NC, /* type */
895 0, /* rightshift */
896 2, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont,/* complain_on_overflow */
901 bfd_elf_generic_reloc, /* special_function */
902 "R_ARM_MOVW_BREL_NC", /* name */
903 FALSE, /* partial_inplace */
904 0x0000ffff, /* src_mask */
905 0x0000ffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 HOWTO (R_ARM_MOVT_BREL, /* type */
909 0, /* rightshift */
910 2, /* size (0 = byte, 1 = short, 2 = long) */
911 16, /* bitsize */
912 FALSE, /* pc_relative */
913 0, /* bitpos */
914 complain_overflow_bitfield,/* complain_on_overflow */
915 bfd_elf_generic_reloc, /* special_function */
916 "R_ARM_MOVT_BREL", /* name */
917 FALSE, /* partial_inplace */
918 0x0000ffff, /* src_mask */
919 0x0000ffff, /* dst_mask */
920 FALSE), /* pcrel_offset */
921
922 HOWTO (R_ARM_MOVW_BREL, /* type */
923 0, /* rightshift */
924 2, /* size (0 = byte, 1 = short, 2 = long) */
925 16, /* bitsize */
926 FALSE, /* pc_relative */
927 0, /* bitpos */
928 complain_overflow_dont,/* complain_on_overflow */
929 bfd_elf_generic_reloc, /* special_function */
930 "R_ARM_MOVW_BREL", /* name */
931 FALSE, /* partial_inplace */
932 0x0000ffff, /* src_mask */
933 0x0000ffff, /* dst_mask */
934 FALSE), /* pcrel_offset */
935
936 HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */
937 0, /* rightshift */
938 2, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_dont,/* complain_on_overflow */
943 bfd_elf_generic_reloc, /* special_function */
944 "R_ARM_THM_MOVW_BREL_NC",/* name */
945 FALSE, /* partial_inplace */
946 0x040f70ff, /* src_mask */
947 0x040f70ff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 HOWTO (R_ARM_THM_MOVT_BREL, /* type */
951 0, /* rightshift */
952 2, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_bitfield,/* complain_on_overflow */
957 bfd_elf_generic_reloc, /* special_function */
958 "R_ARM_THM_MOVT_BREL", /* name */
959 FALSE, /* partial_inplace */
960 0x040f70ff, /* src_mask */
961 0x040f70ff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 HOWTO (R_ARM_THM_MOVW_BREL, /* type */
965 0, /* rightshift */
966 2, /* size (0 = byte, 1 = short, 2 = long) */
967 16, /* bitsize */
968 FALSE, /* pc_relative */
969 0, /* bitpos */
970 complain_overflow_dont,/* complain_on_overflow */
971 bfd_elf_generic_reloc, /* special_function */
972 "R_ARM_THM_MOVW_BREL", /* name */
973 FALSE, /* partial_inplace */
974 0x040f70ff, /* src_mask */
975 0x040f70ff, /* dst_mask */
976 FALSE), /* pcrel_offset */
977
978 EMPTY_HOWTO (90), /* unallocated */
979 EMPTY_HOWTO (91),
980 EMPTY_HOWTO (92),
981 EMPTY_HOWTO (93),
982
983 HOWTO (R_ARM_PLT32_ABS, /* type */
984 0, /* rightshift */
985 2, /* size (0 = byte, 1 = short, 2 = long) */
986 32, /* bitsize */
987 FALSE, /* pc_relative */
988 0, /* bitpos */
989 complain_overflow_dont,/* complain_on_overflow */
990 bfd_elf_generic_reloc, /* special_function */
991 "R_ARM_PLT32_ABS", /* name */
992 FALSE, /* partial_inplace */
993 0xffffffff, /* src_mask */
994 0xffffffff, /* dst_mask */
995 FALSE), /* pcrel_offset */
996
997 HOWTO (R_ARM_GOT_ABS, /* type */
998 0, /* rightshift */
999 2, /* size (0 = byte, 1 = short, 2 = long) */
1000 32, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_dont,/* complain_on_overflow */
1004 bfd_elf_generic_reloc, /* special_function */
1005 "R_ARM_GOT_ABS", /* name */
1006 FALSE, /* partial_inplace */
1007 0xffffffff, /* src_mask */
1008 0xffffffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 HOWTO (R_ARM_GOT_PREL, /* type */
1012 0, /* rightshift */
1013 2, /* size (0 = byte, 1 = short, 2 = long) */
1014 32, /* bitsize */
1015 TRUE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 bfd_elf_generic_reloc, /* special_function */
1019 "R_ARM_GOT_PREL", /* name */
1020 FALSE, /* partial_inplace */
1021 0xffffffff, /* src_mask */
1022 0xffffffff, /* dst_mask */
1023 TRUE), /* pcrel_offset */
1024
1025 HOWTO (R_ARM_GOT_BREL12, /* type */
1026 0, /* rightshift */
1027 2, /* size (0 = byte, 1 = short, 2 = long) */
1028 12, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_bitfield,/* complain_on_overflow */
1032 bfd_elf_generic_reloc, /* special_function */
1033 "R_ARM_GOT_BREL12", /* name */
1034 FALSE, /* partial_inplace */
1035 0x00000fff, /* src_mask */
1036 0x00000fff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 HOWTO (R_ARM_GOTOFF12, /* type */
1040 0, /* rightshift */
1041 2, /* size (0 = byte, 1 = short, 2 = long) */
1042 12, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_bitfield,/* complain_on_overflow */
1046 bfd_elf_generic_reloc, /* special_function */
1047 "R_ARM_GOTOFF12", /* name */
1048 FALSE, /* partial_inplace */
1049 0x00000fff, /* src_mask */
1050 0x00000fff, /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */
1054
1055 /* GNU extension to record C++ vtable member usage */
1056 HOWTO (R_ARM_GNU_VTENTRY, /* type */
1057 0, /* rightshift */
1058 2, /* size (0 = byte, 1 = short, 2 = long) */
1059 0, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont, /* complain_on_overflow */
1063 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1064 "R_ARM_GNU_VTENTRY", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* GNU extension to record C++ vtable hierarchy */
1071 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
1072 0, /* rightshift */
1073 2, /* size (0 = byte, 1 = short, 2 = long) */
1074 0, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_dont, /* complain_on_overflow */
1078 NULL, /* special_function */
1079 "R_ARM_GNU_VTINHERIT", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 HOWTO (R_ARM_THM_JUMP11, /* type */
1086 1, /* rightshift */
1087 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 11, /* bitsize */
1089 TRUE, /* pc_relative */
1090 0, /* bitpos */
1091 complain_overflow_signed, /* complain_on_overflow */
1092 bfd_elf_generic_reloc, /* special_function */
1093 "R_ARM_THM_JUMP11", /* name */
1094 FALSE, /* partial_inplace */
1095 0x000007ff, /* src_mask */
1096 0x000007ff, /* dst_mask */
1097 TRUE), /* pcrel_offset */
1098
1099 HOWTO (R_ARM_THM_JUMP8, /* type */
1100 1, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 8, /* bitsize */
1103 TRUE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_signed, /* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_ARM_THM_JUMP8", /* name */
1108 FALSE, /* partial_inplace */
1109 0x000000ff, /* src_mask */
1110 0x000000ff, /* dst_mask */
1111 TRUE), /* pcrel_offset */
1112
1113 /* TLS relocations */
1114 HOWTO (R_ARM_TLS_GD32, /* type */
1115 0, /* rightshift */
1116 2, /* size (0 = byte, 1 = short, 2 = long) */
1117 32, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_bitfield,/* complain_on_overflow */
1121 NULL, /* special_function */
1122 "R_ARM_TLS_GD32", /* name */
1123 TRUE, /* partial_inplace */
1124 0xffffffff, /* src_mask */
1125 0xffffffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 HOWTO (R_ARM_TLS_LDM32, /* type */
1129 0, /* rightshift */
1130 2, /* size (0 = byte, 1 = short, 2 = long) */
1131 32, /* bitsize */
1132 FALSE, /* pc_relative */
1133 0, /* bitpos */
1134 complain_overflow_bitfield,/* complain_on_overflow */
1135 bfd_elf_generic_reloc, /* special_function */
1136 "R_ARM_TLS_LDM32", /* name */
1137 TRUE, /* partial_inplace */
1138 0xffffffff, /* src_mask */
1139 0xffffffff, /* dst_mask */
1140 FALSE), /* pcrel_offset */
1141
1142 HOWTO (R_ARM_TLS_LDO32, /* type */
1143 0, /* rightshift */
1144 2, /* size (0 = byte, 1 = short, 2 = long) */
1145 32, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_bitfield,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_ARM_TLS_LDO32", /* name */
1151 TRUE, /* partial_inplace */
1152 0xffffffff, /* src_mask */
1153 0xffffffff, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 HOWTO (R_ARM_TLS_IE32, /* type */
1157 0, /* rightshift */
1158 2, /* size (0 = byte, 1 = short, 2 = long) */
1159 32, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_bitfield,/* complain_on_overflow */
1163 NULL, /* special_function */
1164 "R_ARM_TLS_IE32", /* name */
1165 TRUE, /* partial_inplace */
1166 0xffffffff, /* src_mask */
1167 0xffffffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 HOWTO (R_ARM_TLS_LE32, /* type */
1171 0, /* rightshift */
1172 2, /* size (0 = byte, 1 = short, 2 = long) */
1173 32, /* bitsize */
1174 FALSE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_bitfield,/* complain_on_overflow */
1177 bfd_elf_generic_reloc, /* special_function */
1178 "R_ARM_TLS_LE32", /* name */
1179 TRUE, /* partial_inplace */
1180 0xffffffff, /* src_mask */
1181 0xffffffff, /* dst_mask */
1182 FALSE), /* pcrel_offset */
1183
1184 HOWTO (R_ARM_TLS_LDO12, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 12, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_bitfield,/* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_ARM_TLS_LDO12", /* name */
1193 FALSE, /* partial_inplace */
1194 0x00000fff, /* src_mask */
1195 0x00000fff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 HOWTO (R_ARM_TLS_LE12, /* type */
1199 0, /* rightshift */
1200 2, /* size (0 = byte, 1 = short, 2 = long) */
1201 12, /* bitsize */
1202 FALSE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_bitfield,/* complain_on_overflow */
1205 bfd_elf_generic_reloc, /* special_function */
1206 "R_ARM_TLS_LE12", /* name */
1207 FALSE, /* partial_inplace */
1208 0x00000fff, /* src_mask */
1209 0x00000fff, /* dst_mask */
1210 FALSE), /* pcrel_offset */
1211
1212 HOWTO (R_ARM_TLS_IE12GP, /* type */
1213 0, /* rightshift */
1214 2, /* size (0 = byte, 1 = short, 2 = long) */
1215 12, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_bitfield,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_ARM_TLS_IE12GP", /* name */
1221 FALSE, /* partial_inplace */
1222 0x00000fff, /* src_mask */
1223 0x00000fff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225 };
1226
1227 /* 112-127 private relocations
1228 128 R_ARM_ME_TOO, obsolete
1229 129-255 unallocated in AAELF.
1230
1231 249-255 extended, currently unused, relocations: */
1232
1233 static reloc_howto_type elf32_arm_howto_table_3[4] =
1234 {
1235 HOWTO (R_ARM_RREL32, /* type */
1236 0, /* rightshift */
1237 0, /* size (0 = byte, 1 = short, 2 = long) */
1238 0, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont,/* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_ARM_RREL32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 HOWTO (R_ARM_RABS32, /* type */
1250 0, /* rightshift */
1251 0, /* size (0 = byte, 1 = short, 2 = long) */
1252 0, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_dont,/* complain_on_overflow */
1256 bfd_elf_generic_reloc, /* special_function */
1257 "R_ARM_RABS32", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 HOWTO (R_ARM_RPC24, /* type */
1264 0, /* rightshift */
1265 0, /* size (0 = byte, 1 = short, 2 = long) */
1266 0, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_dont,/* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_ARM_RPC24", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 HOWTO (R_ARM_RBASE, /* type */
1278 0, /* rightshift */
1279 0, /* size (0 = byte, 1 = short, 2 = long) */
1280 0, /* bitsize */
1281 FALSE, /* pc_relative */
1282 0, /* bitpos */
1283 complain_overflow_dont,/* complain_on_overflow */
1284 bfd_elf_generic_reloc, /* special_function */
1285 "R_ARM_RBASE", /* name */
1286 FALSE, /* partial_inplace */
1287 0, /* src_mask */
1288 0, /* dst_mask */
1289 FALSE) /* pcrel_offset */
1290 };
1291
1292 static reloc_howto_type *
1293 elf32_arm_howto_from_type (unsigned int r_type)
1294 {
1295 if (r_type < NUM_ELEM (elf32_arm_howto_table_1))
1296 return &elf32_arm_howto_table_1[r_type];
1297
1298 if (r_type >= R_ARM_MOVW_BREL_NC
1299 && r_type < R_ARM_MOVW_BREL_NC + NUM_ELEM (elf32_arm_howto_table_2))
1300 return &elf32_arm_howto_table_2[r_type - R_ARM_MOVW_BREL_NC];
1301
1302 if (r_type >= R_ARM_RREL32
1303 && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2))
1304 return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32];
1305
1306 return NULL;
1307 }
1308
1309 static void
1310 elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc,
1311 Elf_Internal_Rela * elf_reloc)
1312 {
1313 unsigned int r_type;
1314
1315 r_type = ELF32_R_TYPE (elf_reloc->r_info);
1316 bfd_reloc->howto = elf32_arm_howto_from_type (r_type);
1317 }
1318
1319 struct elf32_arm_reloc_map
1320 {
1321 bfd_reloc_code_real_type bfd_reloc_val;
1322 unsigned char elf_reloc_val;
1323 };
1324
1325 /* All entries in this list must also be present in elf32_arm_howto_table. */
1326 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
1327 {
1328 {BFD_RELOC_NONE, R_ARM_NONE},
1329 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24},
1330 {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL},
1331 {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24},
1332 {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25},
1333 {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22},
1334 {BFD_RELOC_32, R_ARM_ABS32},
1335 {BFD_RELOC_32_PCREL, R_ARM_REL32},
1336 {BFD_RELOC_8, R_ARM_ABS8},
1337 {BFD_RELOC_16, R_ARM_ABS16},
1338 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12},
1339 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5},
1340 {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24},
1341 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL},
1342 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11},
1343 {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19},
1344 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8},
1345 {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6},
1346 {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT},
1347 {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT},
1348 {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE},
1349 {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32},
1350 {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC},
1351 {BFD_RELOC_ARM_GOT32, R_ARM_GOT32},
1352 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1353 {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1},
1354 {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32},
1355 {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32},
1356 {BFD_RELOC_ARM_PREL31, R_ARM_PREL31},
1357 {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2},
1358 {BFD_RELOC_ARM_PLT32, R_ARM_PLT32},
1359 {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32},
1360 {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32},
1361 {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32},
1362 {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32},
1363 {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32},
1364 {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32},
1365 {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32},
1366 {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32},
1367 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT},
1368 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY},
1369 {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC},
1370 {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS},
1371 {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC},
1372 {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL},
1373 {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC},
1374 {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS},
1375 {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC},
1376 {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL},
1377 };
1378
1379 static reloc_howto_type *
1380 elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1381 bfd_reloc_code_real_type code)
1382 {
1383 unsigned int i;
1384 for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++)
1385 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
1386 return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val);
1387
1388 return NULL;
1389 }
1390
1391 /* Support for core dump NOTE sections */
1392 static bfd_boolean
1393 elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1394 {
1395 int offset;
1396 size_t size;
1397
1398 switch (note->descsz)
1399 {
1400 default:
1401 return FALSE;
1402
1403 case 148: /* Linux/ARM 32-bit*/
1404 /* pr_cursig */
1405 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1406
1407 /* pr_pid */
1408 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1409
1410 /* pr_reg */
1411 offset = 72;
1412 size = 72;
1413
1414 break;
1415 }
1416
1417 /* Make a ".reg/999" section. */
1418 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1419 size, note->descpos + offset);
1420 }
1421
1422 static bfd_boolean
1423 elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1424 {
1425 switch (note->descsz)
1426 {
1427 default:
1428 return FALSE;
1429
1430 case 124: /* Linux/ARM elf_prpsinfo */
1431 elf_tdata (abfd)->core_program
1432 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1433 elf_tdata (abfd)->core_command
1434 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1435 }
1436
1437 /* Note that for some reason, a spurious space is tacked
1438 onto the end of the args in some (at least one anyway)
1439 implementations, so strip it off if it exists. */
1440
1441 {
1442 char *command = elf_tdata (abfd)->core_command;
1443 int n = strlen (command);
1444
1445 if (0 < n && command[n - 1] == ' ')
1446 command[n - 1] = '\0';
1447 }
1448
1449 return TRUE;
1450 }
1451
1452 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec
1453 #define TARGET_LITTLE_NAME "elf32-littlearm"
1454 #define TARGET_BIG_SYM bfd_elf32_bigarm_vec
1455 #define TARGET_BIG_NAME "elf32-bigarm"
1456
1457 #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus
1458 #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo
1459
1460 typedef unsigned long int insn32;
1461 typedef unsigned short int insn16;
1462
1463 /* In lieu of proper flags, assume all EABIv4 or later objects are
1464 interworkable. */
1465 #define INTERWORK_FLAG(abfd) \
1466 (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \
1467 || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK))
1468
1469 /* The linker script knows the section names for placement.
1470 The entry_names are used to do simple name mangling on the stubs.
1471 Given a function name, and its type, the stub can be found. The
1472 name can be changed. The only requirement is the %s be present. */
1473 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
1474 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
1475
1476 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
1477 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
1478
1479 /* The name of the dynamic interpreter. This is put in the .interp
1480 section. */
1481 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
1482
1483 #ifdef FOUR_WORD_PLT
1484
1485 /* The first entry in a procedure linkage table looks like
1486 this. It is set up so that any shared library function that is
1487 called before the relocation has been set up calls the dynamic
1488 linker first. */
1489 static const bfd_vma elf32_arm_plt0_entry [] =
1490 {
1491 0xe52de004, /* str lr, [sp, #-4]! */
1492 0xe59fe010, /* ldr lr, [pc, #16] */
1493 0xe08fe00e, /* add lr, pc, lr */
1494 0xe5bef008, /* ldr pc, [lr, #8]! */
1495 };
1496
1497 /* Subsequent entries in a procedure linkage table look like
1498 this. */
1499 static const bfd_vma elf32_arm_plt_entry [] =
1500 {
1501 0xe28fc600, /* add ip, pc, #NN */
1502 0xe28cca00, /* add ip, ip, #NN */
1503 0xe5bcf000, /* ldr pc, [ip, #NN]! */
1504 0x00000000, /* unused */
1505 };
1506
1507 #else
1508
1509 /* The first entry in a procedure linkage table looks like
1510 this. It is set up so that any shared library function that is
1511 called before the relocation has been set up calls the dynamic
1512 linker first. */
1513 static const bfd_vma elf32_arm_plt0_entry [] =
1514 {
1515 0xe52de004, /* str lr, [sp, #-4]! */
1516 0xe59fe004, /* ldr lr, [pc, #4] */
1517 0xe08fe00e, /* add lr, pc, lr */
1518 0xe5bef008, /* ldr pc, [lr, #8]! */
1519 0x00000000, /* &GOT[0] - . */
1520 };
1521
1522 /* Subsequent entries in a procedure linkage table look like
1523 this. */
1524 static const bfd_vma elf32_arm_plt_entry [] =
1525 {
1526 0xe28fc600, /* add ip, pc, #0xNN00000 */
1527 0xe28cca00, /* add ip, ip, #0xNN000 */
1528 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
1529 };
1530
1531 #endif
1532
1533 /* The format of the first entry in the procedure linkage table
1534 for a VxWorks executable. */
1535 static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] =
1536 {
1537 0xe52dc008, /* str ip,[sp,#-8]! */
1538 0xe59fc000, /* ldr ip,[pc] */
1539 0xe59cf008, /* ldr pc,[ip,#8] */
1540 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */
1541 };
1542
1543 /* The format of subsequent entries in a VxWorks executable. */
1544 static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] =
1545 {
1546 0xe59fc000, /* ldr ip,[pc] */
1547 0xe59cf000, /* ldr pc,[ip] */
1548 0x00000000, /* .long @got */
1549 0xe59fc000, /* ldr ip,[pc] */
1550 0xea000000, /* b _PLT */
1551 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1552 };
1553
1554 /* The format of entries in a VxWorks shared library. */
1555 static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] =
1556 {
1557 0xe59fc000, /* ldr ip,[pc] */
1558 0xe79cf009, /* ldr pc,[ip,r9] */
1559 0x00000000, /* .long @got */
1560 0xe59fc000, /* ldr ip,[pc] */
1561 0xe599f008, /* ldr pc,[r9,#8] */
1562 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */
1563 };
1564
1565 /* An initial stub used if the PLT entry is referenced from Thumb code. */
1566 #define PLT_THUMB_STUB_SIZE 4
1567 static const bfd_vma elf32_arm_plt_thumb_stub [] =
1568 {
1569 0x4778, /* bx pc */
1570 0x46c0 /* nop */
1571 };
1572
1573 /* The entries in a PLT when using a DLL-based target with multiple
1574 address spaces. */
1575 static const bfd_vma elf32_arm_symbian_plt_entry [] =
1576 {
1577 0xe51ff004, /* ldr pc, [pc, #-4] */
1578 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */
1579 };
1580
1581 /* Used to build a map of a section. This is required for mixed-endian
1582 code/data. */
1583
1584 typedef struct elf32_elf_section_map
1585 {
1586 bfd_vma vma;
1587 char type;
1588 }
1589 elf32_arm_section_map;
1590
1591 typedef struct _arm_elf_section_data
1592 {
1593 struct bfd_elf_section_data elf;
1594 unsigned int mapcount;
1595 elf32_arm_section_map *map;
1596 }
1597 _arm_elf_section_data;
1598
1599 #define elf32_arm_section_data(sec) \
1600 ((_arm_elf_section_data *) elf_section_data (sec))
1601
1602 /* The size of the thread control block. */
1603 #define TCB_SIZE 8
1604
1605 #define NUM_KNOWN_ATTRIBUTES 32
1606
1607 typedef struct aeabi_attribute
1608 {
1609 int type;
1610 unsigned int i;
1611 char *s;
1612 } aeabi_attribute;
1613
1614 typedef struct aeabi_attribute_list
1615 {
1616 struct aeabi_attribute_list *next;
1617 int tag;
1618 aeabi_attribute attr;
1619 } aeabi_attribute_list;
1620
1621 struct elf32_arm_obj_tdata
1622 {
1623 struct elf_obj_tdata root;
1624
1625 /* tls_type for each local got entry. */
1626 char *local_got_tls_type;
1627
1628 aeabi_attribute known_eabi_attributes[NUM_KNOWN_ATTRIBUTES];
1629 aeabi_attribute_list *other_eabi_attributes;
1630 };
1631
1632 #define elf32_arm_tdata(abfd) \
1633 ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any)
1634
1635 #define elf32_arm_local_got_tls_type(abfd) \
1636 (elf32_arm_tdata (abfd)->local_got_tls_type)
1637
1638 static bfd_boolean
1639 elf32_arm_mkobject (bfd *abfd)
1640 {
1641 bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata);
1642 abfd->tdata.any = bfd_zalloc (abfd, amt);
1643 if (abfd->tdata.any == NULL)
1644 return FALSE;
1645 return TRUE;
1646 }
1647
1648 /* The ARM linker needs to keep track of the number of relocs that it
1649 decides to copy in check_relocs for each symbol. This is so that
1650 it can discard PC relative relocs if it doesn't need them when
1651 linking with -Bsymbolic. We store the information in a field
1652 extending the regular ELF linker hash table. */
1653
1654 /* This structure keeps track of the number of relocs we have copied
1655 for a given symbol. */
1656 struct elf32_arm_relocs_copied
1657 {
1658 /* Next section. */
1659 struct elf32_arm_relocs_copied * next;
1660 /* A section in dynobj. */
1661 asection * section;
1662 /* Number of relocs copied in this section. */
1663 bfd_size_type count;
1664 /* Number of PC-relative relocs copied in this section. */
1665 bfd_size_type pc_count;
1666 };
1667
1668 #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent))
1669
1670 /* Arm ELF linker hash entry. */
1671 struct elf32_arm_link_hash_entry
1672 {
1673 struct elf_link_hash_entry root;
1674
1675 /* Number of PC relative relocs copied for this symbol. */
1676 struct elf32_arm_relocs_copied * relocs_copied;
1677
1678 /* We reference count Thumb references to a PLT entry separately,
1679 so that we can emit the Thumb trampoline only if needed. */
1680 bfd_signed_vma plt_thumb_refcount;
1681
1682 /* Since PLT entries have variable size if the Thumb prologue is
1683 used, we need to record the index into .got.plt instead of
1684 recomputing it from the PLT offset. */
1685 bfd_signed_vma plt_got_offset;
1686
1687 #define GOT_UNKNOWN 0
1688 #define GOT_NORMAL 1
1689 #define GOT_TLS_GD 2
1690 #define GOT_TLS_IE 4
1691 unsigned char tls_type;
1692 };
1693
1694 /* Traverse an arm ELF linker hash table. */
1695 #define elf32_arm_link_hash_traverse(table, func, info) \
1696 (elf_link_hash_traverse \
1697 (&(table)->root, \
1698 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
1699 (info)))
1700
1701 /* Get the ARM elf linker hash table from a link_info structure. */
1702 #define elf32_arm_hash_table(info) \
1703 ((struct elf32_arm_link_hash_table *) ((info)->hash))
1704
1705 /* ARM ELF linker hash table. */
1706 struct elf32_arm_link_hash_table
1707 {
1708 /* The main hash table. */
1709 struct elf_link_hash_table root;
1710
1711 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
1712 bfd_size_type thumb_glue_size;
1713
1714 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
1715 bfd_size_type arm_glue_size;
1716
1717 /* An arbitrary input BFD chosen to hold the glue sections. */
1718 bfd * bfd_of_glue_owner;
1719
1720 /* Nonzero to output a BE8 image. */
1721 int byteswap_code;
1722
1723 /* Zero if R_ARM_TARGET1 means R_ARM_ABS32.
1724 Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
1725 int target1_is_rel;
1726
1727 /* The relocation to use for R_ARM_TARGET2 relocations. */
1728 int target2_reloc;
1729
1730 /* Nonzero to fix BX instructions for ARMv4 targets. */
1731 int fix_v4bx;
1732
1733 /* Nonzero if the ARM/Thumb BLX instructions are available for use. */
1734 int use_blx;
1735
1736 /* The number of bytes in the initial entry in the PLT. */
1737 bfd_size_type plt_header_size;
1738
1739 /* The number of bytes in the subsequent PLT etries. */
1740 bfd_size_type plt_entry_size;
1741
1742 /* True if the target system is VxWorks. */
1743 int vxworks_p;
1744
1745 /* True if the target system is Symbian OS. */
1746 int symbian_p;
1747
1748 /* True if the target uses REL relocations. */
1749 int use_rel;
1750
1751 /* Short-cuts to get to dynamic linker sections. */
1752 asection *sgot;
1753 asection *sgotplt;
1754 asection *srelgot;
1755 asection *splt;
1756 asection *srelplt;
1757 asection *sdynbss;
1758 asection *srelbss;
1759
1760 /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */
1761 asection *srelplt2;
1762
1763 /* Data for R_ARM_TLS_LDM32 relocations. */
1764 union {
1765 bfd_signed_vma refcount;
1766 bfd_vma offset;
1767 } tls_ldm_got;
1768
1769 /* Small local sym to section mapping cache. */
1770 struct sym_sec_cache sym_sec;
1771
1772 /* For convenience in allocate_dynrelocs. */
1773 bfd * obfd;
1774 };
1775
1776 /* Create an entry in an ARM ELF linker hash table. */
1777
1778 static struct bfd_hash_entry *
1779 elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry,
1780 struct bfd_hash_table * table,
1781 const char * string)
1782 {
1783 struct elf32_arm_link_hash_entry * ret =
1784 (struct elf32_arm_link_hash_entry *) entry;
1785
1786 /* Allocate the structure if it has not already been allocated by a
1787 subclass. */
1788 if (ret == (struct elf32_arm_link_hash_entry *) NULL)
1789 ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry));
1790 if (ret == NULL)
1791 return (struct bfd_hash_entry *) ret;
1792
1793 /* Call the allocation method of the superclass. */
1794 ret = ((struct elf32_arm_link_hash_entry *)
1795 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1796 table, string));
1797 if (ret != NULL)
1798 {
1799 ret->relocs_copied = NULL;
1800 ret->tls_type = GOT_UNKNOWN;
1801 ret->plt_thumb_refcount = 0;
1802 ret->plt_got_offset = -1;
1803 }
1804
1805 return (struct bfd_hash_entry *) ret;
1806 }
1807
1808 /* Return true if NAME is the name of the relocation section associated
1809 with S. */
1810
1811 static bfd_boolean
1812 reloc_section_p (struct elf32_arm_link_hash_table *htab,
1813 const char *name, asection *s)
1814 {
1815 if (htab->use_rel)
1816 return strncmp (name, ".rel", 4) == 0 && strcmp (s->name, name + 4) == 0;
1817 else
1818 return strncmp (name, ".rela", 5) == 0 && strcmp (s->name, name + 5) == 0;
1819 }
1820
1821 /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up
1822 shortcuts to them in our hash table. */
1823
1824 static bfd_boolean
1825 create_got_section (bfd *dynobj, struct bfd_link_info *info)
1826 {
1827 struct elf32_arm_link_hash_table *htab;
1828
1829 htab = elf32_arm_hash_table (info);
1830 /* BPABI objects never have a GOT, or associated sections. */
1831 if (htab->symbian_p)
1832 return TRUE;
1833
1834 if (! _bfd_elf_create_got_section (dynobj, info))
1835 return FALSE;
1836
1837 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
1838 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1839 if (!htab->sgot || !htab->sgotplt)
1840 abort ();
1841
1842 htab->srelgot = bfd_make_section_with_flags (dynobj,
1843 RELOC_SECTION (htab, ".got"),
1844 (SEC_ALLOC | SEC_LOAD
1845 | SEC_HAS_CONTENTS
1846 | SEC_IN_MEMORY
1847 | SEC_LINKER_CREATED
1848 | SEC_READONLY));
1849 if (htab->srelgot == NULL
1850 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
1851 return FALSE;
1852 return TRUE;
1853 }
1854
1855 /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and
1856 .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our
1857 hash table. */
1858
1859 static bfd_boolean
1860 elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1861 {
1862 struct elf32_arm_link_hash_table *htab;
1863
1864 htab = elf32_arm_hash_table (info);
1865 if (!htab->sgot && !create_got_section (dynobj, info))
1866 return FALSE;
1867
1868 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1869 return FALSE;
1870
1871 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
1872 htab->srelplt = bfd_get_section_by_name (dynobj,
1873 RELOC_SECTION (htab, ".plt"));
1874 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
1875 if (!info->shared)
1876 htab->srelbss = bfd_get_section_by_name (dynobj,
1877 RELOC_SECTION (htab, ".bss"));
1878
1879 if (htab->vxworks_p)
1880 {
1881 if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
1882 return FALSE;
1883
1884 if (info->shared)
1885 {
1886 htab->plt_header_size = 0;
1887 htab->plt_entry_size
1888 = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry);
1889 }
1890 else
1891 {
1892 htab->plt_header_size
1893 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry);
1894 htab->plt_entry_size
1895 = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry);
1896 }
1897 }
1898
1899 if (!htab->splt
1900 || !htab->srelplt
1901 || !htab->sdynbss
1902 || (!info->shared && !htab->srelbss))
1903 abort ();
1904
1905 return TRUE;
1906 }
1907
1908 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1909
1910 static void
1911 elf32_arm_copy_indirect_symbol (struct bfd_link_info *info,
1912 struct elf_link_hash_entry *dir,
1913 struct elf_link_hash_entry *ind)
1914 {
1915 struct elf32_arm_link_hash_entry *edir, *eind;
1916
1917 edir = (struct elf32_arm_link_hash_entry *) dir;
1918 eind = (struct elf32_arm_link_hash_entry *) ind;
1919
1920 if (eind->relocs_copied != NULL)
1921 {
1922 if (edir->relocs_copied != NULL)
1923 {
1924 struct elf32_arm_relocs_copied **pp;
1925 struct elf32_arm_relocs_copied *p;
1926
1927 /* Add reloc counts against the indirect sym to the direct sym
1928 list. Merge any entries against the same section. */
1929 for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
1930 {
1931 struct elf32_arm_relocs_copied *q;
1932
1933 for (q = edir->relocs_copied; q != NULL; q = q->next)
1934 if (q->section == p->section)
1935 {
1936 q->pc_count += p->pc_count;
1937 q->count += p->count;
1938 *pp = p->next;
1939 break;
1940 }
1941 if (q == NULL)
1942 pp = &p->next;
1943 }
1944 *pp = edir->relocs_copied;
1945 }
1946
1947 edir->relocs_copied = eind->relocs_copied;
1948 eind->relocs_copied = NULL;
1949 }
1950
1951 /* Copy over PLT info. */
1952 edir->plt_thumb_refcount += eind->plt_thumb_refcount;
1953 eind->plt_thumb_refcount = 0;
1954
1955 if (ind->root.type == bfd_link_hash_indirect
1956 && dir->got.refcount <= 0)
1957 {
1958 edir->tls_type = eind->tls_type;
1959 eind->tls_type = GOT_UNKNOWN;
1960 }
1961
1962 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1963 }
1964
1965 /* Create an ARM elf linker hash table. */
1966
1967 static struct bfd_link_hash_table *
1968 elf32_arm_link_hash_table_create (bfd *abfd)
1969 {
1970 struct elf32_arm_link_hash_table *ret;
1971 bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
1972
1973 ret = bfd_malloc (amt);
1974 if (ret == NULL)
1975 return NULL;
1976
1977 if (!_bfd_elf_link_hash_table_init (& ret->root, abfd,
1978 elf32_arm_link_hash_newfunc,
1979 sizeof (struct elf32_arm_link_hash_entry)))
1980 {
1981 free (ret);
1982 return NULL;
1983 }
1984
1985 ret->sgot = NULL;
1986 ret->sgotplt = NULL;
1987 ret->srelgot = NULL;
1988 ret->splt = NULL;
1989 ret->srelplt = NULL;
1990 ret->sdynbss = NULL;
1991 ret->srelbss = NULL;
1992 ret->srelplt2 = NULL;
1993 ret->thumb_glue_size = 0;
1994 ret->arm_glue_size = 0;
1995 ret->bfd_of_glue_owner = NULL;
1996 ret->byteswap_code = 0;
1997 ret->target1_is_rel = 0;
1998 ret->target2_reloc = R_ARM_NONE;
1999 #ifdef FOUR_WORD_PLT
2000 ret->plt_header_size = 16;
2001 ret->plt_entry_size = 16;
2002 #else
2003 ret->plt_header_size = 20;
2004 ret->plt_entry_size = 12;
2005 #endif
2006 ret->fix_v4bx = 0;
2007 ret->use_blx = 0;
2008 ret->vxworks_p = 0;
2009 ret->symbian_p = 0;
2010 ret->use_rel = 1;
2011 ret->sym_sec.abfd = NULL;
2012 ret->obfd = abfd;
2013 ret->tls_ldm_got.refcount = 0;
2014
2015 return &ret->root.root;
2016 }
2017
2018 /* Locate the Thumb encoded calling stub for NAME. */
2019
2020 static struct elf_link_hash_entry *
2021 find_thumb_glue (struct bfd_link_info *link_info,
2022 const char *name,
2023 bfd *input_bfd)
2024 {
2025 char *tmp_name;
2026 struct elf_link_hash_entry *hash;
2027 struct elf32_arm_link_hash_table *hash_table;
2028
2029 /* We need a pointer to the armelf specific hash table. */
2030 hash_table = elf32_arm_hash_table (link_info);
2031
2032 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2033 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2034
2035 BFD_ASSERT (tmp_name);
2036
2037 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2038
2039 hash = elf_link_hash_lookup
2040 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2041
2042 if (hash == NULL)
2043 /* xgettext:c-format */
2044 (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"),
2045 input_bfd, tmp_name, name);
2046
2047 free (tmp_name);
2048
2049 return hash;
2050 }
2051
2052 /* Locate the ARM encoded calling stub for NAME. */
2053
2054 static struct elf_link_hash_entry *
2055 find_arm_glue (struct bfd_link_info *link_info,
2056 const char *name,
2057 bfd *input_bfd)
2058 {
2059 char *tmp_name;
2060 struct elf_link_hash_entry *myh;
2061 struct elf32_arm_link_hash_table *hash_table;
2062
2063 /* We need a pointer to the elfarm specific hash table. */
2064 hash_table = elf32_arm_hash_table (link_info);
2065
2066 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2067 + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2068
2069 BFD_ASSERT (tmp_name);
2070
2071 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2072
2073 myh = elf_link_hash_lookup
2074 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2075
2076 if (myh == NULL)
2077 /* xgettext:c-format */
2078 (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"),
2079 input_bfd, tmp_name, name);
2080
2081 free (tmp_name);
2082
2083 return myh;
2084 }
2085
2086 /* ARM->Thumb glue (static images):
2087
2088 .arm
2089 __func_from_arm:
2090 ldr r12, __func_addr
2091 bx r12
2092 __func_addr:
2093 .word func @ behave as if you saw a ARM_32 reloc.
2094
2095 (relocatable images)
2096 .arm
2097 __func_from_arm:
2098 ldr r12, __func_offset
2099 add r12, r12, pc
2100 bx r12
2101 __func_offset:
2102 .word func - .
2103 */
2104
2105 #define ARM2THUMB_STATIC_GLUE_SIZE 12
2106 static const insn32 a2t1_ldr_insn = 0xe59fc000;
2107 static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
2108 static const insn32 a2t3_func_addr_insn = 0x00000001;
2109
2110 #define ARM2THUMB_PIC_GLUE_SIZE 16
2111 static const insn32 a2t1p_ldr_insn = 0xe59fc004;
2112 static const insn32 a2t2p_add_pc_insn = 0xe08cc00f;
2113 static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c;
2114
2115 /* Thumb->ARM: Thumb->(non-interworking aware) ARM
2116
2117 .thumb .thumb
2118 .align 2 .align 2
2119 __func_from_thumb: __func_from_thumb:
2120 bx pc push {r6, lr}
2121 nop ldr r6, __func_addr
2122 .arm mov lr, pc
2123 __func_change_to_arm: bx r6
2124 b func .arm
2125 __func_back_to_thumb:
2126 ldmia r13! {r6, lr}
2127 bx lr
2128 __func_addr:
2129 .word func */
2130
2131 #define THUMB2ARM_GLUE_SIZE 8
2132 static const insn16 t2a1_bx_pc_insn = 0x4778;
2133 static const insn16 t2a2_noop_insn = 0x46c0;
2134 static const insn32 t2a3_b_insn = 0xea000000;
2135
2136 #ifndef ELFARM_NABI_C_INCLUDED
2137 bfd_boolean
2138 bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info)
2139 {
2140 asection * s;
2141 bfd_byte * foo;
2142 struct elf32_arm_link_hash_table * globals;
2143
2144 globals = elf32_arm_hash_table (info);
2145
2146 BFD_ASSERT (globals != NULL);
2147
2148 if (globals->arm_glue_size != 0)
2149 {
2150 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2151
2152 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2153 ARM2THUMB_GLUE_SECTION_NAME);
2154
2155 BFD_ASSERT (s != NULL);
2156
2157 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
2158
2159 s->size = globals->arm_glue_size;
2160 s->contents = foo;
2161 }
2162
2163 if (globals->thumb_glue_size != 0)
2164 {
2165 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2166
2167 s = bfd_get_section_by_name
2168 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2169
2170 BFD_ASSERT (s != NULL);
2171
2172 foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
2173
2174 s->size = globals->thumb_glue_size;
2175 s->contents = foo;
2176 }
2177
2178 return TRUE;
2179 }
2180
2181 static void
2182 record_arm_to_thumb_glue (struct bfd_link_info * link_info,
2183 struct elf_link_hash_entry * h)
2184 {
2185 const char * name = h->root.root.string;
2186 asection * s;
2187 char * tmp_name;
2188 struct elf_link_hash_entry * myh;
2189 struct bfd_link_hash_entry * bh;
2190 struct elf32_arm_link_hash_table * globals;
2191 bfd_vma val;
2192
2193 globals = elf32_arm_hash_table (link_info);
2194
2195 BFD_ASSERT (globals != NULL);
2196 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2197
2198 s = bfd_get_section_by_name
2199 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
2200
2201 BFD_ASSERT (s != NULL);
2202
2203 tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
2204
2205 BFD_ASSERT (tmp_name);
2206
2207 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
2208
2209 myh = elf_link_hash_lookup
2210 (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
2211
2212 if (myh != NULL)
2213 {
2214 /* We've already seen this guy. */
2215 free (tmp_name);
2216 return;
2217 }
2218
2219 /* The only trick here is using hash_table->arm_glue_size as the value.
2220 Even though the section isn't allocated yet, this is where we will be
2221 putting it. */
2222 bh = NULL;
2223 val = globals->arm_glue_size + 1;
2224 _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
2225 tmp_name, BSF_GLOBAL, s, val,
2226 NULL, TRUE, FALSE, &bh);
2227
2228 myh = (struct elf_link_hash_entry *) bh;
2229 myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
2230 myh->forced_local = 1;
2231
2232 free (tmp_name);
2233
2234 if ((link_info->shared || globals->root.is_relocatable_executable))
2235 globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE;
2236 else
2237 globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE;
2238
2239 return;
2240 }
2241
2242 static void
2243 record_thumb_to_arm_glue (struct bfd_link_info *link_info,
2244 struct elf_link_hash_entry *h)
2245 {
2246 const char *name = h->root.root.string;
2247 asection *s;
2248 char *tmp_name;
2249 struct elf_link_hash_entry *myh;
2250 struct bfd_link_hash_entry *bh;
2251 struct elf32_arm_link_hash_table *hash_table;
2252 bfd_vma val;
2253
2254 hash_table = elf32_arm_hash_table (link_info);
2255
2256 BFD_ASSERT (hash_table != NULL);
2257 BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
2258
2259 s = bfd_get_section_by_name
2260 (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
2261
2262 BFD_ASSERT (s != NULL);
2263
2264 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2265 + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
2266
2267 BFD_ASSERT (tmp_name);
2268
2269 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
2270
2271 myh = elf_link_hash_lookup
2272 (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
2273
2274 if (myh != NULL)
2275 {
2276 /* We've already seen this guy. */
2277 free (tmp_name);
2278 return;
2279 }
2280
2281 bh = NULL;
2282 val = hash_table->thumb_glue_size + 1;
2283 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2284 tmp_name, BSF_GLOBAL, s, val,
2285 NULL, TRUE, FALSE, &bh);
2286
2287 /* If we mark it 'Thumb', the disassembler will do a better job. */
2288 myh = (struct elf_link_hash_entry *) bh;
2289 myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC);
2290 myh->forced_local = 1;
2291
2292 free (tmp_name);
2293
2294 #define CHANGE_TO_ARM "__%s_change_to_arm"
2295 #define BACK_FROM_ARM "__%s_back_from_arm"
2296
2297 /* Allocate another symbol to mark where we switch to Arm mode. */
2298 tmp_name = bfd_malloc ((bfd_size_type) strlen (name)
2299 + strlen (CHANGE_TO_ARM) + 1);
2300
2301 BFD_ASSERT (tmp_name);
2302
2303 sprintf (tmp_name, CHANGE_TO_ARM, name);
2304
2305 bh = NULL;
2306 val = hash_table->thumb_glue_size + 4,
2307 _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
2308 tmp_name, BSF_LOCAL, s, val,
2309 NULL, TRUE, FALSE, &bh);
2310
2311 free (tmp_name);
2312
2313 hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2314
2315 return;
2316 }
2317
2318 /* Add the glue sections to ABFD. This function is called from the
2319 linker scripts in ld/emultempl/{armelf}.em. */
2320
2321 bfd_boolean
2322 bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd,
2323 struct bfd_link_info *info)
2324 {
2325 flagword flags;
2326 asection *sec;
2327
2328 /* If we are only performing a partial
2329 link do not bother adding the glue. */
2330 if (info->relocatable)
2331 return TRUE;
2332
2333 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
2334
2335 if (sec == NULL)
2336 {
2337 /* Note: we do not include the flag SEC_LINKER_CREATED, as this
2338 will prevent elf_link_input_bfd() from processing the contents
2339 of this section. */
2340 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
2341
2342 sec = bfd_make_section_with_flags (abfd,
2343 ARM2THUMB_GLUE_SECTION_NAME,
2344 flags);
2345
2346 if (sec == NULL
2347 || !bfd_set_section_alignment (abfd, sec, 2))
2348 return FALSE;
2349
2350 /* Set the gc mark to prevent the section from being removed by garbage
2351 collection, despite the fact that no relocs refer to this section. */
2352 sec->gc_mark = 1;
2353 }
2354
2355 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
2356
2357 if (sec == NULL)
2358 {
2359 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2360 | SEC_CODE | SEC_READONLY;
2361
2362 sec = bfd_make_section_with_flags (abfd,
2363 THUMB2ARM_GLUE_SECTION_NAME,
2364 flags);
2365
2366 if (sec == NULL
2367 || !bfd_set_section_alignment (abfd, sec, 2))
2368 return FALSE;
2369
2370 sec->gc_mark = 1;
2371 }
2372
2373 return TRUE;
2374 }
2375
2376 /* Select a BFD to be used to hold the sections used by the glue code.
2377 This function is called from the linker scripts in ld/emultempl/
2378 {armelf/pe}.em */
2379
2380 bfd_boolean
2381 bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info)
2382 {
2383 struct elf32_arm_link_hash_table *globals;
2384
2385 /* If we are only performing a partial link
2386 do not bother getting a bfd to hold the glue. */
2387 if (info->relocatable)
2388 return TRUE;
2389
2390 /* Make sure we don't attach the glue sections to a dynamic object. */
2391 BFD_ASSERT (!(abfd->flags & DYNAMIC));
2392
2393 globals = elf32_arm_hash_table (info);
2394
2395 BFD_ASSERT (globals != NULL);
2396
2397 if (globals->bfd_of_glue_owner != NULL)
2398 return TRUE;
2399
2400 /* Save the bfd for later use. */
2401 globals->bfd_of_glue_owner = abfd;
2402
2403 return TRUE;
2404 }
2405
2406 static void check_use_blx(struct elf32_arm_link_hash_table *globals)
2407 {
2408 if (elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch) > 2)
2409 globals->use_blx = 1;
2410 }
2411
2412 bfd_boolean
2413 bfd_elf32_arm_process_before_allocation (bfd *abfd,
2414 struct bfd_link_info *link_info,
2415 int byteswap_code)
2416 {
2417 Elf_Internal_Shdr *symtab_hdr;
2418 Elf_Internal_Rela *internal_relocs = NULL;
2419 Elf_Internal_Rela *irel, *irelend;
2420 bfd_byte *contents = NULL;
2421
2422 asection *sec;
2423 struct elf32_arm_link_hash_table *globals;
2424
2425 /* If we are only performing a partial link do not bother
2426 to construct any glue. */
2427 if (link_info->relocatable)
2428 return TRUE;
2429
2430 /* Here we have a bfd that is to be included on the link. We have a hook
2431 to do reloc rummaging, before section sizes are nailed down. */
2432 globals = elf32_arm_hash_table (link_info);
2433 check_use_blx (globals);
2434
2435 BFD_ASSERT (globals != NULL);
2436 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2437
2438 if (byteswap_code && !bfd_big_endian (abfd))
2439 {
2440 _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
2441 abfd);
2442 return FALSE;
2443 }
2444 globals->byteswap_code = byteswap_code;
2445
2446 /* Rummage around all the relocs and map the glue vectors. */
2447 sec = abfd->sections;
2448
2449 if (sec == NULL)
2450 return TRUE;
2451
2452 for (; sec != NULL; sec = sec->next)
2453 {
2454 if (sec->reloc_count == 0)
2455 continue;
2456
2457 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2458
2459 /* Load the relocs. */
2460 internal_relocs
2461 = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL,
2462 (Elf_Internal_Rela *) NULL, FALSE);
2463
2464 if (internal_relocs == NULL)
2465 goto error_return;
2466
2467 irelend = internal_relocs + sec->reloc_count;
2468 for (irel = internal_relocs; irel < irelend; irel++)
2469 {
2470 long r_type;
2471 unsigned long r_index;
2472
2473 struct elf_link_hash_entry *h;
2474
2475 r_type = ELF32_R_TYPE (irel->r_info);
2476 r_index = ELF32_R_SYM (irel->r_info);
2477
2478 /* These are the only relocation types we care about. */
2479 if ( r_type != R_ARM_PC24
2480 && r_type != R_ARM_PLT32
2481 && r_type != R_ARM_CALL
2482 && r_type != R_ARM_JUMP24
2483 && r_type != R_ARM_THM_CALL)
2484 continue;
2485
2486 /* Get the section contents if we haven't done so already. */
2487 if (contents == NULL)
2488 {
2489 /* Get cached copy if it exists. */
2490 if (elf_section_data (sec)->this_hdr.contents != NULL)
2491 contents = elf_section_data (sec)->this_hdr.contents;
2492 else
2493 {
2494 /* Go get them off disk. */
2495 if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2496 goto error_return;
2497 }
2498 }
2499
2500 /* If the relocation is not against a symbol it cannot concern us. */
2501 h = NULL;
2502
2503 /* We don't care about local symbols. */
2504 if (r_index < symtab_hdr->sh_info)
2505 continue;
2506
2507 /* This is an external symbol. */
2508 r_index -= symtab_hdr->sh_info;
2509 h = (struct elf_link_hash_entry *)
2510 elf_sym_hashes (abfd)[r_index];
2511
2512 /* If the relocation is against a static symbol it must be within
2513 the current section and so cannot be a cross ARM/Thumb relocation. */
2514 if (h == NULL)
2515 continue;
2516
2517 /* If the call will go through a PLT entry then we do not need
2518 glue. */
2519 if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1)
2520 continue;
2521
2522 switch (r_type)
2523 {
2524 case R_ARM_PC24:
2525 case R_ARM_PLT32:
2526 case R_ARM_CALL:
2527 case R_ARM_JUMP24:
2528 /* This one is a call from arm code. We need to look up
2529 the target of the call. If it is a thumb target, we
2530 insert glue. */
2531 if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC
2532 && !(r_type == R_ARM_CALL && globals->use_blx))
2533 record_arm_to_thumb_glue (link_info, h);
2534 break;
2535
2536 case R_ARM_THM_CALL:
2537 /* This one is a call from thumb code. We look
2538 up the target of the call. If it is not a thumb
2539 target, we insert glue. */
2540 if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC && !globals->use_blx)
2541 record_thumb_to_arm_glue (link_info, h);
2542 break;
2543
2544 default:
2545 abort ();
2546 }
2547 }
2548
2549 if (contents != NULL
2550 && elf_section_data (sec)->this_hdr.contents != contents)
2551 free (contents);
2552 contents = NULL;
2553
2554 if (internal_relocs != NULL
2555 && elf_section_data (sec)->relocs != internal_relocs)
2556 free (internal_relocs);
2557 internal_relocs = NULL;
2558 }
2559
2560 return TRUE;
2561
2562 error_return:
2563 if (contents != NULL
2564 && elf_section_data (sec)->this_hdr.contents != contents)
2565 free (contents);
2566 if (internal_relocs != NULL
2567 && elf_section_data (sec)->relocs != internal_relocs)
2568 free (internal_relocs);
2569
2570 return FALSE;
2571 }
2572 #endif
2573
2574
2575 /* Set target relocation values needed during linking. */
2576
2577 void
2578 bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
2579 int target1_is_rel,
2580 char * target2_type,
2581 int fix_v4bx,
2582 int use_blx)
2583 {
2584 struct elf32_arm_link_hash_table *globals;
2585
2586 globals = elf32_arm_hash_table (link_info);
2587
2588 globals->target1_is_rel = target1_is_rel;
2589 if (strcmp (target2_type, "rel") == 0)
2590 globals->target2_reloc = R_ARM_REL32;
2591 else if (strcmp (target2_type, "abs") == 0)
2592 globals->target2_reloc = R_ARM_ABS32;
2593 else if (strcmp (target2_type, "got-rel") == 0)
2594 globals->target2_reloc = R_ARM_GOT_PREL;
2595 else
2596 {
2597 _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
2598 target2_type);
2599 }
2600 globals->fix_v4bx = fix_v4bx;
2601 globals->use_blx |= use_blx;
2602 }
2603
2604 /* The thumb form of a long branch is a bit finicky, because the offset
2605 encoding is split over two fields, each in it's own instruction. They
2606 can occur in any order. So given a thumb form of long branch, and an
2607 offset, insert the offset into the thumb branch and return finished
2608 instruction.
2609
2610 It takes two thumb instructions to encode the target address. Each has
2611 11 bits to invest. The upper 11 bits are stored in one (identified by
2612 H-0.. see below), the lower 11 bits are stored in the other (identified
2613 by H-1).
2614
2615 Combine together and shifted left by 1 (it's a half word address) and
2616 there you have it.
2617
2618 Op: 1111 = F,
2619 H-0, upper address-0 = 000
2620 Op: 1111 = F,
2621 H-1, lower address-0 = 800
2622
2623 They can be ordered either way, but the arm tools I've seen always put
2624 the lower one first. It probably doesn't matter. krk@cygnus.com
2625
2626 XXX: Actually the order does matter. The second instruction (H-1)
2627 moves the computed address into the PC, so it must be the second one
2628 in the sequence. The problem, however is that whilst little endian code
2629 stores the instructions in HI then LOW order, big endian code does the
2630 reverse. nickc@cygnus.com. */
2631
2632 #define LOW_HI_ORDER 0xF800F000
2633 #define HI_LOW_ORDER 0xF000F800
2634
2635 static insn32
2636 insert_thumb_branch (insn32 br_insn, int rel_off)
2637 {
2638 unsigned int low_bits;
2639 unsigned int high_bits;
2640
2641 BFD_ASSERT ((rel_off & 1) != 1);
2642
2643 rel_off >>= 1; /* Half word aligned address. */
2644 low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
2645 high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
2646
2647 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
2648 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
2649 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
2650 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
2651 else
2652 /* FIXME: abort is probably not the right call. krk@cygnus.com */
2653 abort (); /* Error - not a valid branch instruction form. */
2654
2655 return br_insn;
2656 }
2657
2658
2659 /* Store an Arm insn into an output section not processed by
2660 elf32_arm_write_section. */
2661
2662 static void
2663 put_arm_insn (struct elf32_arm_link_hash_table *htab,
2664 bfd * output_bfd, bfd_vma val, void * ptr)
2665 {
2666 if (htab->byteswap_code != bfd_little_endian (output_bfd))
2667 bfd_putl32 (val, ptr);
2668 else
2669 bfd_putb32 (val, ptr);
2670 }
2671
2672
2673 /* Store a 16-bit Thumb insn into an output section not processed by
2674 elf32_arm_write_section. */
2675
2676 static void
2677 put_thumb_insn (struct elf32_arm_link_hash_table *htab,
2678 bfd * output_bfd, bfd_vma val, void * ptr)
2679 {
2680 if (htab->byteswap_code != bfd_little_endian (output_bfd))
2681 bfd_putl16 (val, ptr);
2682 else
2683 bfd_putb16 (val, ptr);
2684 }
2685
2686
2687 /* Thumb code calling an ARM function. */
2688
2689 static int
2690 elf32_thumb_to_arm_stub (struct bfd_link_info * info,
2691 const char * name,
2692 bfd * input_bfd,
2693 bfd * output_bfd,
2694 asection * input_section,
2695 bfd_byte * hit_data,
2696 asection * sym_sec,
2697 bfd_vma offset,
2698 bfd_signed_vma addend,
2699 bfd_vma val)
2700 {
2701 asection * s = 0;
2702 bfd_vma my_offset;
2703 unsigned long int tmp;
2704 long int ret_offset;
2705 struct elf_link_hash_entry * myh;
2706 struct elf32_arm_link_hash_table * globals;
2707
2708 myh = find_thumb_glue (info, name, input_bfd);
2709 if (myh == NULL)
2710 return FALSE;
2711
2712 globals = elf32_arm_hash_table (info);
2713
2714 BFD_ASSERT (globals != NULL);
2715 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2716
2717 my_offset = myh->root.u.def.value;
2718
2719 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2720 THUMB2ARM_GLUE_SECTION_NAME);
2721
2722 BFD_ASSERT (s != NULL);
2723 BFD_ASSERT (s->contents != NULL);
2724 BFD_ASSERT (s->output_section != NULL);
2725
2726 if ((my_offset & 0x01) == 0x01)
2727 {
2728 if (sym_sec != NULL
2729 && sym_sec->owner != NULL
2730 && !INTERWORK_FLAG (sym_sec->owner))
2731 {
2732 (*_bfd_error_handler)
2733 (_("%B(%s): warning: interworking not enabled.\n"
2734 " first occurrence: %B: thumb call to arm"),
2735 sym_sec->owner, input_bfd, name);
2736
2737 return FALSE;
2738 }
2739
2740 --my_offset;
2741 myh->root.u.def.value = my_offset;
2742
2743 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn,
2744 s->contents + my_offset);
2745
2746 put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn,
2747 s->contents + my_offset + 2);
2748
2749 ret_offset =
2750 /* Address of destination of the stub. */
2751 ((bfd_signed_vma) val)
2752 - ((bfd_signed_vma)
2753 /* Offset from the start of the current section
2754 to the start of the stubs. */
2755 (s->output_offset
2756 /* Offset of the start of this stub from the start of the stubs. */
2757 + my_offset
2758 /* Address of the start of the current section. */
2759 + s->output_section->vma)
2760 /* The branch instruction is 4 bytes into the stub. */
2761 + 4
2762 /* ARM branches work from the pc of the instruction + 8. */
2763 + 8);
2764
2765 put_arm_insn (globals, output_bfd,
2766 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
2767 s->contents + my_offset + 4);
2768 }
2769
2770 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
2771
2772 /* Now go back and fix up the original BL insn to point to here. */
2773 ret_offset =
2774 /* Address of where the stub is located. */
2775 (s->output_section->vma + s->output_offset + my_offset)
2776 /* Address of where the BL is located. */
2777 - (input_section->output_section->vma + input_section->output_offset
2778 + offset)
2779 /* Addend in the relocation. */
2780 - addend
2781 /* Biassing for PC-relative addressing. */
2782 - 8;
2783
2784 tmp = bfd_get_32 (input_bfd, hit_data
2785 - input_section->vma);
2786
2787 bfd_put_32 (output_bfd,
2788 (bfd_vma) insert_thumb_branch (tmp, ret_offset),
2789 hit_data - input_section->vma);
2790
2791 return TRUE;
2792 }
2793
2794 /* Arm code calling a Thumb function. */
2795
2796 static int
2797 elf32_arm_to_thumb_stub (struct bfd_link_info * info,
2798 const char * name,
2799 bfd * input_bfd,
2800 bfd * output_bfd,
2801 asection * input_section,
2802 bfd_byte * hit_data,
2803 asection * sym_sec,
2804 bfd_vma offset,
2805 bfd_signed_vma addend,
2806 bfd_vma val)
2807 {
2808 unsigned long int tmp;
2809 bfd_vma my_offset;
2810 asection * s;
2811 long int ret_offset;
2812 struct elf_link_hash_entry * myh;
2813 struct elf32_arm_link_hash_table * globals;
2814
2815 myh = find_arm_glue (info, name, input_bfd);
2816 if (myh == NULL)
2817 return FALSE;
2818
2819 globals = elf32_arm_hash_table (info);
2820
2821 BFD_ASSERT (globals != NULL);
2822 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2823
2824 my_offset = myh->root.u.def.value;
2825 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
2826 ARM2THUMB_GLUE_SECTION_NAME);
2827 BFD_ASSERT (s != NULL);
2828 BFD_ASSERT (s->contents != NULL);
2829 BFD_ASSERT (s->output_section != NULL);
2830
2831 if ((my_offset & 0x01) == 0x01)
2832 {
2833 if (sym_sec != NULL
2834 && sym_sec->owner != NULL
2835 && !INTERWORK_FLAG (sym_sec->owner))
2836 {
2837 (*_bfd_error_handler)
2838 (_("%B(%s): warning: interworking not enabled.\n"
2839 " first occurrence: %B: arm call to thumb"),
2840 sym_sec->owner, input_bfd, name);
2841 }
2842
2843 --my_offset;
2844 myh->root.u.def.value = my_offset;
2845
2846 if ((info->shared || globals->root.is_relocatable_executable))
2847 {
2848 /* For relocatable objects we can't use absolute addresses,
2849 so construct the address from a relative offset. */
2850 /* TODO: If the offset is small it's probably worth
2851 constructing the address with adds. */
2852 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn,
2853 s->contents + my_offset);
2854 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn,
2855 s->contents + my_offset + 4);
2856 put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn,
2857 s->contents + my_offset + 8);
2858 /* Adjust the offset by 4 for the position of the add,
2859 and 8 for the pipeline offset. */
2860 ret_offset = (val - (s->output_offset
2861 + s->output_section->vma
2862 + my_offset + 12))
2863 | 1;
2864 bfd_put_32 (output_bfd, ret_offset,
2865 s->contents + my_offset + 12);
2866 }
2867 else
2868 {
2869 put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn,
2870 s->contents + my_offset);
2871
2872 put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn,
2873 s->contents + my_offset + 4);
2874
2875 /* It's a thumb address. Add the low order bit. */
2876 bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
2877 s->contents + my_offset + 8);
2878 }
2879 }
2880
2881 BFD_ASSERT (my_offset <= globals->arm_glue_size);
2882
2883 tmp = bfd_get_32 (input_bfd, hit_data);
2884 tmp = tmp & 0xFF000000;
2885
2886 /* Somehow these are both 4 too far, so subtract 8. */
2887 ret_offset = (s->output_offset
2888 + my_offset
2889 + s->output_section->vma
2890 - (input_section->output_offset
2891 + input_section->output_section->vma
2892 + offset + addend)
2893 - 8);
2894
2895 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
2896
2897 bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
2898
2899 return TRUE;
2900 }
2901
2902 /* Some relocations map to different relocations depending on the
2903 target. Return the real relocation. */
2904 static int
2905 arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
2906 int r_type)
2907 {
2908 switch (r_type)
2909 {
2910 case R_ARM_TARGET1:
2911 if (globals->target1_is_rel)
2912 return R_ARM_REL32;
2913 else
2914 return R_ARM_ABS32;
2915
2916 case R_ARM_TARGET2:
2917 return globals->target2_reloc;
2918
2919 default:
2920 return r_type;
2921 }
2922 }
2923
2924 /* Return the base VMA address which should be subtracted from real addresses
2925 when resolving @dtpoff relocation.
2926 This is PT_TLS segment p_vaddr. */
2927
2928 static bfd_vma
2929 dtpoff_base (struct bfd_link_info *info)
2930 {
2931 /* If tls_sec is NULL, we should have signalled an error already. */
2932 if (elf_hash_table (info)->tls_sec == NULL)
2933 return 0;
2934 return elf_hash_table (info)->tls_sec->vma;
2935 }
2936
2937 /* Return the relocation value for @tpoff relocation
2938 if STT_TLS virtual address is ADDRESS. */
2939
2940 static bfd_vma
2941 tpoff (struct bfd_link_info *info, bfd_vma address)
2942 {
2943 struct elf_link_hash_table *htab = elf_hash_table (info);
2944 bfd_vma base;
2945
2946 /* If tls_sec is NULL, we should have signalled an error already. */
2947 if (htab->tls_sec == NULL)
2948 return 0;
2949 base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power);
2950 return address - htab->tls_sec->vma + base;
2951 }
2952
2953 /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA.
2954 VALUE is the relocation value. */
2955
2956 static bfd_reloc_status_type
2957 elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value)
2958 {
2959 if (value > 0xfff)
2960 return bfd_reloc_overflow;
2961
2962 value |= bfd_get_32 (abfd, data) & 0xfffff000;
2963 bfd_put_32 (abfd, value, data);
2964 return bfd_reloc_ok;
2965 }
2966
2967 /* Perform a relocation as part of a final link. */
2968
2969 static bfd_reloc_status_type
2970 elf32_arm_final_link_relocate (reloc_howto_type * howto,
2971 bfd * input_bfd,
2972 bfd * output_bfd,
2973 asection * input_section,
2974 bfd_byte * contents,
2975 Elf_Internal_Rela * rel,
2976 bfd_vma value,
2977 struct bfd_link_info * info,
2978 asection * sym_sec,
2979 const char * sym_name,
2980 int sym_flags,
2981 struct elf_link_hash_entry * h,
2982 bfd_boolean * unresolved_reloc_p)
2983 {
2984 unsigned long r_type = howto->type;
2985 unsigned long r_symndx;
2986 bfd_byte * hit_data = contents + rel->r_offset;
2987 bfd * dynobj = NULL;
2988 Elf_Internal_Shdr * symtab_hdr;
2989 struct elf_link_hash_entry ** sym_hashes;
2990 bfd_vma * local_got_offsets;
2991 asection * sgot = NULL;
2992 asection * splt = NULL;
2993 asection * sreloc = NULL;
2994 bfd_vma addend;
2995 bfd_signed_vma signed_addend;
2996 struct elf32_arm_link_hash_table * globals;
2997
2998 globals = elf32_arm_hash_table (info);
2999
3000 /* Some relocation type map to different relocations depending on the
3001 target. We pick the right one here. */
3002 r_type = arm_real_reloc_type (globals, r_type);
3003 if (r_type != howto->type)
3004 howto = elf32_arm_howto_from_type (r_type);
3005
3006 /* If the start address has been set, then set the EF_ARM_HASENTRY
3007 flag. Setting this more than once is redundant, but the cost is
3008 not too high, and it keeps the code simple.
3009
3010 The test is done here, rather than somewhere else, because the
3011 start address is only set just before the final link commences.
3012
3013 Note - if the user deliberately sets a start address of 0, the
3014 flag will not be set. */
3015 if (bfd_get_start_address (output_bfd) != 0)
3016 elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
3017
3018 dynobj = elf_hash_table (info)->dynobj;
3019 if (dynobj)
3020 {
3021 sgot = bfd_get_section_by_name (dynobj, ".got");
3022 splt = bfd_get_section_by_name (dynobj, ".plt");
3023 }
3024 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
3025 sym_hashes = elf_sym_hashes (input_bfd);
3026 local_got_offsets = elf_local_got_offsets (input_bfd);
3027 r_symndx = ELF32_R_SYM (rel->r_info);
3028
3029 if (globals->use_rel)
3030 {
3031 addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
3032
3033 if (addend & ((howto->src_mask + 1) >> 1))
3034 {
3035 signed_addend = -1;
3036 signed_addend &= ~ howto->src_mask;
3037 signed_addend |= addend;
3038 }
3039 else
3040 signed_addend = addend;
3041 }
3042 else
3043 addend = signed_addend = rel->r_addend;
3044
3045 switch (r_type)
3046 {
3047 case R_ARM_NONE:
3048 /* We don't need to find a value for this symbol. It's just a
3049 marker. */
3050 *unresolved_reloc_p = FALSE;
3051 return bfd_reloc_ok;
3052
3053 case R_ARM_ABS12:
3054 if (!globals->vxworks_p)
3055 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
3056
3057 case R_ARM_PC24:
3058 case R_ARM_ABS32:
3059 case R_ARM_REL32:
3060 case R_ARM_CALL:
3061 case R_ARM_JUMP24:
3062 case R_ARM_XPC25:
3063 case R_ARM_PREL31:
3064 case R_ARM_PLT32:
3065 /* r_symndx will be zero only for relocs against symbols
3066 from removed linkonce sections, or sections discarded by
3067 a linker script. */
3068 if (r_symndx == 0)
3069 return bfd_reloc_ok;
3070
3071 /* Handle relocations which should use the PLT entry. ABS32/REL32
3072 will use the symbol's value, which may point to a PLT entry, but we
3073 don't need to handle that here. If we created a PLT entry, all
3074 branches in this object should go to it. */
3075 if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
3076 && h != NULL
3077 && splt != NULL
3078 && h->plt.offset != (bfd_vma) -1)
3079 {
3080 /* If we've created a .plt section, and assigned a PLT entry to
3081 this function, it should not be known to bind locally. If
3082 it were, we would have cleared the PLT entry. */
3083 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
3084
3085 value = (splt->output_section->vma
3086 + splt->output_offset
3087 + h->plt.offset);
3088 *unresolved_reloc_p = FALSE;
3089 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3090 contents, rel->r_offset, value,
3091 rel->r_addend);
3092 }
3093
3094 /* When generating a shared object or relocatable executable, these
3095 relocations are copied into the output file to be resolved at
3096 run time. */
3097 if ((info->shared || globals->root.is_relocatable_executable)
3098 && (input_section->flags & SEC_ALLOC)
3099 && (r_type != R_ARM_REL32
3100 || !SYMBOL_CALLS_LOCAL (info, h))
3101 && (h == NULL
3102 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3103 || h->root.type != bfd_link_hash_undefweak)
3104 && r_type != R_ARM_PC24
3105 && r_type != R_ARM_CALL
3106 && r_type != R_ARM_JUMP24
3107 && r_type != R_ARM_PREL31
3108 && r_type != R_ARM_PLT32)
3109 {
3110 Elf_Internal_Rela outrel;
3111 bfd_byte *loc;
3112 bfd_boolean skip, relocate;
3113
3114 *unresolved_reloc_p = FALSE;
3115
3116 if (sreloc == NULL)
3117 {
3118 const char * name;
3119
3120 name = (bfd_elf_string_from_elf_section
3121 (input_bfd,
3122 elf_elfheader (input_bfd)->e_shstrndx,
3123 elf_section_data (input_section)->rel_hdr.sh_name));
3124 if (name == NULL)
3125 return bfd_reloc_notsupported;
3126
3127 BFD_ASSERT (reloc_section_p (globals, name, input_section));
3128
3129 sreloc = bfd_get_section_by_name (dynobj, name);
3130 BFD_ASSERT (sreloc != NULL);
3131 }
3132
3133 skip = FALSE;
3134 relocate = FALSE;
3135
3136 outrel.r_addend = addend;
3137 outrel.r_offset =
3138 _bfd_elf_section_offset (output_bfd, info, input_section,
3139 rel->r_offset);
3140 if (outrel.r_offset == (bfd_vma) -1)
3141 skip = TRUE;
3142 else if (outrel.r_offset == (bfd_vma) -2)
3143 skip = TRUE, relocate = TRUE;
3144 outrel.r_offset += (input_section->output_section->vma
3145 + input_section->output_offset);
3146
3147 if (skip)
3148 memset (&outrel, 0, sizeof outrel);
3149 else if (h != NULL
3150 && h->dynindx != -1
3151 && (!info->shared
3152 || !info->symbolic
3153 || !h->def_regular))
3154 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3155 else
3156 {
3157 int symbol;
3158
3159 /* This symbol is local, or marked to become local. */
3160 if (sym_flags == STT_ARM_TFUNC)
3161 value |= 1;
3162 if (globals->symbian_p)
3163 {
3164 /* On Symbian OS, the data segment and text segement
3165 can be relocated independently. Therefore, we
3166 must indicate the segment to which this
3167 relocation is relative. The BPABI allows us to
3168 use any symbol in the right segment; we just use
3169 the section symbol as it is convenient. (We
3170 cannot use the symbol given by "h" directly as it
3171 will not appear in the dynamic symbol table.) */
3172 if (sym_sec)
3173 symbol = elf_section_data (sym_sec->output_section)->dynindx;
3174 else
3175 symbol = elf_section_data (input_section->output_section)->dynindx;
3176 BFD_ASSERT (symbol != 0);
3177 }
3178 else
3179 /* On SVR4-ish systems, the dynamic loader cannot
3180 relocate the text and data segments independently,
3181 so the symbol does not matter. */
3182 symbol = 0;
3183 outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE);
3184 if (globals->use_rel)
3185 relocate = TRUE;
3186 else
3187 outrel.r_addend += value;
3188 }
3189
3190 loc = sreloc->contents;
3191 loc += sreloc->reloc_count++ * RELOC_SIZE (globals);
3192 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3193
3194 /* If this reloc is against an external symbol, we do not want to
3195 fiddle with the addend. Otherwise, we need to include the symbol
3196 value so that it becomes an addend for the dynamic reloc. */
3197 if (! relocate)
3198 return bfd_reloc_ok;
3199
3200 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3201 contents, rel->r_offset, value,
3202 (bfd_vma) 0);
3203 }
3204 else switch (r_type)
3205 {
3206 case R_ARM_ABS12:
3207 return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend);
3208
3209 case R_ARM_XPC25: /* Arm BLX instruction. */
3210 case R_ARM_CALL:
3211 case R_ARM_JUMP24:
3212 case R_ARM_PC24: /* Arm B/BL instruction */
3213 case R_ARM_PLT32:
3214 if (r_type == R_ARM_XPC25)
3215 {
3216 /* Check for Arm calling Arm function. */
3217 /* FIXME: Should we translate the instruction into a BL
3218 instruction instead ? */
3219 if (sym_flags != STT_ARM_TFUNC)
3220 (*_bfd_error_handler)
3221 (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."),
3222 input_bfd,
3223 h ? h->root.root.string : "(local)");
3224 }
3225 else if (r_type != R_ARM_CALL || !globals->use_blx)
3226 {
3227 /* Check for Arm calling Thumb function. */
3228 if (sym_flags == STT_ARM_TFUNC)
3229 {
3230 elf32_arm_to_thumb_stub (info, sym_name, input_bfd,
3231 output_bfd, input_section,
3232 hit_data, sym_sec, rel->r_offset,
3233 signed_addend, value);
3234 return bfd_reloc_ok;
3235 }
3236 }
3237
3238 /* The ARM ELF ABI says that this reloc is computed as: S - P + A
3239 where:
3240 S is the address of the symbol in the relocation.
3241 P is address of the instruction being relocated.
3242 A is the addend (extracted from the instruction) in bytes.
3243
3244 S is held in 'value'.
3245 P is the base address of the section containing the
3246 instruction plus the offset of the reloc into that
3247 section, ie:
3248 (input_section->output_section->vma +
3249 input_section->output_offset +
3250 rel->r_offset).
3251 A is the addend, converted into bytes, ie:
3252 (signed_addend * 4)
3253
3254 Note: None of these operations have knowledge of the pipeline
3255 size of the processor, thus it is up to the assembler to
3256 encode this information into the addend. */
3257 value -= (input_section->output_section->vma
3258 + input_section->output_offset);
3259 value -= rel->r_offset;
3260 if (globals->use_rel)
3261 value += (signed_addend << howto->size);
3262 else
3263 /* RELA addends do not have to be adjusted by howto->size. */
3264 value += signed_addend;
3265
3266 signed_addend = value;
3267 signed_addend >>= howto->rightshift;
3268
3269 /* It is not an error for an undefined weak reference to be
3270 out of range. Any program that branches to such a symbol
3271 is going to crash anyway, so there is no point worrying
3272 about getting the destination exactly right. */
3273 if (! h || h->root.type != bfd_link_hash_undefweak)
3274 {
3275 /* Perform a signed range check. */
3276 if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
3277 || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
3278 return bfd_reloc_overflow;
3279 }
3280
3281 addend = (value & 2);
3282
3283 value = (signed_addend & howto->dst_mask)
3284 | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
3285
3286 /* Set the H bit in the BLX instruction. */
3287 if (sym_flags == STT_ARM_TFUNC)
3288 {
3289 if (addend)
3290 value |= (1 << 24);
3291 else
3292 value &= ~(bfd_vma)(1 << 24);
3293 }
3294 if (r_type == R_ARM_CALL)
3295 {
3296 /* Select the correct instruction (BL or BLX). */
3297 if (sym_flags == STT_ARM_TFUNC)
3298 value |= (1 << 28);
3299 else
3300 {
3301 value &= ~(bfd_vma)(1 << 28);
3302 value |= (1 << 24);
3303 }
3304 }
3305 break;
3306
3307 case R_ARM_ABS32:
3308 value += addend;
3309 if (sym_flags == STT_ARM_TFUNC)
3310 value |= 1;
3311 break;
3312
3313 case R_ARM_REL32:
3314 value += addend;
3315 if (sym_flags == STT_ARM_TFUNC)
3316 value |= 1;
3317 value -= (input_section->output_section->vma
3318 + input_section->output_offset + rel->r_offset);
3319 break;
3320
3321 case R_ARM_PREL31:
3322 value -= (input_section->output_section->vma
3323 + input_section->output_offset + rel->r_offset);
3324 value += signed_addend;
3325 if (! h || h->root.type != bfd_link_hash_undefweak)
3326 {
3327 /* Check for overflow */
3328 if ((value ^ (value >> 1)) & (1 << 30))
3329 return bfd_reloc_overflow;
3330 }
3331 value &= 0x7fffffff;
3332 value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
3333 if (sym_flags == STT_ARM_TFUNC)
3334 value |= 1;
3335 break;
3336 }
3337
3338 bfd_put_32 (input_bfd, value, hit_data);
3339 return bfd_reloc_ok;
3340
3341 case R_ARM_ABS8:
3342 value += addend;
3343 if ((long) value > 0x7f || (long) value < -0x80)
3344 return bfd_reloc_overflow;
3345
3346 bfd_put_8 (input_bfd, value, hit_data);
3347 return bfd_reloc_ok;
3348
3349 case R_ARM_ABS16:
3350 value += addend;
3351
3352 if ((long) value > 0x7fff || (long) value < -0x8000)
3353 return bfd_reloc_overflow;
3354
3355 bfd_put_16 (input_bfd, value, hit_data);
3356 return bfd_reloc_ok;
3357
3358 case R_ARM_THM_ABS5:
3359 /* Support ldr and str instructions for the thumb. */
3360 if (globals->use_rel)
3361 {
3362 /* Need to refetch addend. */
3363 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3364 /* ??? Need to determine shift amount from operand size. */
3365 addend >>= howto->rightshift;
3366 }
3367 value += addend;
3368
3369 /* ??? Isn't value unsigned? */
3370 if ((long) value > 0x1f || (long) value < -0x10)
3371 return bfd_reloc_overflow;
3372
3373 /* ??? Value needs to be properly shifted into place first. */
3374 value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
3375 bfd_put_16 (input_bfd, value, hit_data);
3376 return bfd_reloc_ok;
3377
3378 case R_ARM_THM_XPC22:
3379 case R_ARM_THM_CALL:
3380 /* Thumb BL (branch long instruction). */
3381 {
3382 bfd_vma relocation;
3383 bfd_boolean overflow = FALSE;
3384 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3385 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3386 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3387 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3388 bfd_vma check;
3389 bfd_signed_vma signed_check;
3390
3391 /* Need to refetch the addend and squish the two 11 bit pieces
3392 together. */
3393 if (globals->use_rel)
3394 {
3395 bfd_vma upper = upper_insn & 0x7ff;
3396 bfd_vma lower = lower_insn & 0x7ff;
3397 upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
3398 addend = (upper << 12) | (lower << 1);
3399 signed_addend = addend;
3400 }
3401
3402 if (r_type == R_ARM_THM_XPC22)
3403 {
3404 /* Check for Thumb to Thumb call. */
3405 /* FIXME: Should we translate the instruction into a BL
3406 instruction instead ? */
3407 if (sym_flags == STT_ARM_TFUNC)
3408 (*_bfd_error_handler)
3409 (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."),
3410 input_bfd,
3411 h ? h->root.root.string : "(local)");
3412 }
3413 else
3414 {
3415 /* If it is not a call to Thumb, assume call to Arm.
3416 If it is a call relative to a section name, then it is not a
3417 function call at all, but rather a long jump. Calls through
3418 the PLT do not require stubs. */
3419 if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION
3420 && (h == NULL || splt == NULL
3421 || h->plt.offset == (bfd_vma) -1))
3422 {
3423 if (globals->use_blx)
3424 {
3425 /* Convert BL to BLX. */
3426 lower_insn = (lower_insn & ~0x1000) | 0x0800;
3427 }
3428 else if (elf32_thumb_to_arm_stub
3429 (info, sym_name, input_bfd, output_bfd, input_section,
3430 hit_data, sym_sec, rel->r_offset, signed_addend, value))
3431 return bfd_reloc_ok;
3432 else
3433 return bfd_reloc_dangerous;
3434 }
3435 else if (sym_flags == STT_ARM_TFUNC && globals->use_blx)
3436 {
3437 /* Make sure this is a BL. */
3438 lower_insn |= 0x1800;
3439 }
3440 }
3441
3442 /* Handle calls via the PLT. */
3443 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
3444 {
3445 value = (splt->output_section->vma
3446 + splt->output_offset
3447 + h->plt.offset);
3448 if (globals->use_blx)
3449 {
3450 /* If the Thumb BLX instruction is available, convert the
3451 BL to a BLX instruction to call the ARM-mode PLT entry. */
3452 lower_insn = (lower_insn & ~0x1000) | 0x0800;
3453 }
3454 else
3455 /* Target the Thumb stub before the ARM PLT entry. */
3456 value -= PLT_THUMB_STUB_SIZE;
3457 *unresolved_reloc_p = FALSE;
3458 }
3459
3460 relocation = value + signed_addend;
3461
3462 relocation -= (input_section->output_section->vma
3463 + input_section->output_offset
3464 + rel->r_offset);
3465
3466 check = relocation >> howto->rightshift;
3467
3468 /* If this is a signed value, the rightshift just dropped
3469 leading 1 bits (assuming twos complement). */
3470 if ((bfd_signed_vma) relocation >= 0)
3471 signed_check = check;
3472 else
3473 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3474
3475 /* Assumes two's complement. */
3476 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3477 overflow = TRUE;
3478
3479 if ((lower_insn & 0x1800) == 0x0800)
3480 /* For a BLX instruction, make sure that the relocation is rounded up
3481 to a word boundary. This follows the semantics of the instruction
3482 which specifies that bit 1 of the target address will come from bit
3483 1 of the base address. */
3484 relocation = (relocation + 2) & ~ 3;
3485
3486 /* Put RELOCATION back into the insn. */
3487 upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
3488 lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
3489
3490 /* Put the relocated value back in the object file: */
3491 bfd_put_16 (input_bfd, upper_insn, hit_data);
3492 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3493
3494 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3495 }
3496 break;
3497
3498 case R_ARM_THM_JUMP24:
3499 /* Thumb32 unconditional branch instruction. */
3500 {
3501 bfd_vma relocation;
3502 bfd_boolean overflow = FALSE;
3503 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3504 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3505 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3506 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3507 bfd_vma check;
3508 bfd_signed_vma signed_check;
3509
3510 /* Need to refetch the addend, reconstruct the top three bits, and glue the
3511 two pieces together. */
3512 if (globals->use_rel)
3513 {
3514 bfd_vma S = (upper_insn & 0x0400) >> 10;
3515 bfd_vma hi = (upper_insn & 0x03ff);
3516 bfd_vma I1 = (lower_insn & 0x2000) >> 13;
3517 bfd_vma I2 = (lower_insn & 0x0800) >> 11;
3518 bfd_vma lo = (lower_insn & 0x07ff);
3519
3520 I1 = !(I1 ^ S);
3521 I2 = !(I2 ^ S);
3522 S = !S;
3523
3524 signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1);
3525 signed_addend -= (1 << 24); /* Sign extend. */
3526 }
3527
3528 /* ??? Should handle interworking? GCC might someday try to
3529 use this for tail calls. */
3530
3531 relocation = value + signed_addend;
3532 relocation -= (input_section->output_section->vma
3533 + input_section->output_offset
3534 + rel->r_offset);
3535
3536 check = relocation >> howto->rightshift;
3537
3538 /* If this is a signed value, the rightshift just dropped
3539 leading 1 bits (assuming twos complement). */
3540 if ((bfd_signed_vma) relocation >= 0)
3541 signed_check = check;
3542 else
3543 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3544
3545 /* Assumes two's complement. */
3546 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3547 overflow = TRUE;
3548
3549 /* Put RELOCATION back into the insn. */
3550 {
3551 bfd_vma S = (relocation & 0x01000000) >> 24;
3552 bfd_vma I1 = (relocation & 0x00800000) >> 23;
3553 bfd_vma I2 = (relocation & 0x00400000) >> 22;
3554 bfd_vma hi = (relocation & 0x003ff000) >> 12;
3555 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
3556
3557 I1 = !(I1 ^ S);
3558 I2 = !(I2 ^ S);
3559
3560 upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi;
3561 lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo;
3562 }
3563
3564 /* Put the relocated value back in the object file: */
3565 bfd_put_16 (input_bfd, upper_insn, hit_data);
3566 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3567
3568 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3569 }
3570
3571 case R_ARM_THM_JUMP19:
3572 /* Thumb32 conditional branch instruction. */
3573 {
3574 bfd_vma relocation;
3575 bfd_boolean overflow = FALSE;
3576 bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
3577 bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
3578 bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
3579 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3580 bfd_vma check;
3581 bfd_signed_vma signed_check;
3582
3583 /* Need to refetch the addend, reconstruct the top three bits,
3584 and squish the two 11 bit pieces together. */
3585 if (globals->use_rel)
3586 {
3587 bfd_vma S = (upper_insn & 0x0400) >> 10;
3588 bfd_vma upper = (upper_insn & 0x001f);
3589 bfd_vma J1 = (lower_insn & 0x2000) >> 13;
3590 bfd_vma J2 = (lower_insn & 0x0800) >> 11;
3591 bfd_vma lower = (lower_insn & 0x07ff);
3592
3593 upper |= J2 << 6;
3594 upper |= J1 << 7;
3595 upper |= ~S << 8;
3596 upper -= 0x0100; /* Sign extend. */
3597
3598 addend = (upper << 12) | (lower << 1);
3599 signed_addend = addend;
3600 }
3601
3602 /* ??? Should handle interworking? GCC might someday try to
3603 use this for tail calls. */
3604
3605 relocation = value + signed_addend;
3606 relocation -= (input_section->output_section->vma
3607 + input_section->output_offset
3608 + rel->r_offset);
3609
3610 check = relocation >> howto->rightshift;
3611
3612 /* If this is a signed value, the rightshift just dropped
3613 leading 1 bits (assuming twos complement). */
3614 if ((bfd_signed_vma) relocation >= 0)
3615 signed_check = check;
3616 else
3617 signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
3618
3619 /* Assumes two's complement. */
3620 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3621 overflow = TRUE;
3622
3623 /* Put RELOCATION back into the insn. */
3624 {
3625 bfd_vma S = (relocation & 0x00100000) >> 20;
3626 bfd_vma J2 = (relocation & 0x00080000) >> 19;
3627 bfd_vma J1 = (relocation & 0x00040000) >> 18;
3628 bfd_vma hi = (relocation & 0x0003f000) >> 12;
3629 bfd_vma lo = (relocation & 0x00000ffe) >> 1;
3630
3631 upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi;
3632 lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo;
3633 }
3634
3635 /* Put the relocated value back in the object file: */
3636 bfd_put_16 (input_bfd, upper_insn, hit_data);
3637 bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
3638
3639 return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
3640 }
3641
3642 case R_ARM_THM_JUMP11:
3643 case R_ARM_THM_JUMP8:
3644 case R_ARM_THM_JUMP6:
3645 /* Thumb B (branch) instruction). */
3646 {
3647 bfd_signed_vma relocation;
3648 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
3649 bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
3650 bfd_signed_vma signed_check;
3651
3652 /* CZB cannot jump backward. */
3653 if (r_type == R_ARM_THM_JUMP6)
3654 reloc_signed_min = 0;
3655
3656 if (globals->use_rel)
3657 {
3658 /* Need to refetch addend. */
3659 addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
3660 if (addend & ((howto->src_mask + 1) >> 1))
3661 {
3662 signed_addend = -1;
3663 signed_addend &= ~ howto->src_mask;
3664 signed_addend |= addend;
3665 }
3666 else
3667 signed_addend = addend;
3668 /* The value in the insn has been right shifted. We need to
3669 undo this, so that we can perform the address calculation
3670 in terms of bytes. */
3671 signed_addend <<= howto->rightshift;
3672 }
3673 relocation = value + signed_addend;
3674
3675 relocation -= (input_section->output_section->vma
3676 + input_section->output_offset
3677 + rel->r_offset);
3678
3679 relocation >>= howto->rightshift;
3680 signed_check = relocation;
3681
3682 if (r_type == R_ARM_THM_JUMP6)
3683 relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3);
3684 else
3685 relocation &= howto->dst_mask;
3686 relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
3687
3688 bfd_put_16 (input_bfd, relocation, hit_data);
3689
3690 /* Assumes two's complement. */
3691 if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
3692 return bfd_reloc_overflow;
3693
3694 return bfd_reloc_ok;
3695 }
3696
3697 case R_ARM_ALU_PCREL7_0:
3698 case R_ARM_ALU_PCREL15_8:
3699 case R_ARM_ALU_PCREL23_15:
3700 {
3701 bfd_vma insn;
3702 bfd_vma relocation;
3703
3704 insn = bfd_get_32 (input_bfd, hit_data);
3705 if (globals->use_rel)
3706 {
3707 /* Extract the addend. */
3708 addend = (insn & 0xff) << ((insn & 0xf00) >> 7);
3709 signed_addend = addend;
3710 }
3711 relocation = value + signed_addend;
3712
3713 relocation -= (input_section->output_section->vma
3714 + input_section->output_offset
3715 + rel->r_offset);
3716 insn = (insn & ~0xfff)
3717 | ((howto->bitpos << 7) & 0xf00)
3718 | ((relocation >> howto->bitpos) & 0xff);
3719 bfd_put_32 (input_bfd, value, hit_data);
3720 }
3721 return bfd_reloc_ok;
3722
3723 case R_ARM_GNU_VTINHERIT:
3724 case R_ARM_GNU_VTENTRY:
3725 return bfd_reloc_ok;
3726
3727 case R_ARM_GOTOFF32:
3728 /* Relocation is relative to the start of the
3729 global offset table. */
3730
3731 BFD_ASSERT (sgot != NULL);
3732 if (sgot == NULL)
3733 return bfd_reloc_notsupported;
3734
3735 /* If we are addressing a Thumb function, we need to adjust the
3736 address by one, so that attempts to call the function pointer will
3737 correctly interpret it as Thumb code. */
3738 if (sym_flags == STT_ARM_TFUNC)
3739 value += 1;
3740
3741 /* Note that sgot->output_offset is not involved in this
3742 calculation. We always want the start of .got. If we
3743 define _GLOBAL_OFFSET_TABLE in a different way, as is
3744 permitted by the ABI, we might have to change this
3745 calculation. */
3746 value -= sgot->output_section->vma;
3747 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3748 contents, rel->r_offset, value,
3749 rel->r_addend);
3750
3751 case R_ARM_GOTPC:
3752 /* Use global offset table as symbol value. */
3753 BFD_ASSERT (sgot != NULL);
3754
3755 if (sgot == NULL)
3756 return bfd_reloc_notsupported;
3757
3758 *unresolved_reloc_p = FALSE;
3759 value = sgot->output_section->vma;
3760 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3761 contents, rel->r_offset, value,
3762 rel->r_addend);
3763
3764 case R_ARM_GOT32:
3765 case R_ARM_GOT_PREL:
3766 /* Relocation is to the entry for this symbol in the
3767 global offset table. */
3768 if (sgot == NULL)
3769 return bfd_reloc_notsupported;
3770
3771 if (h != NULL)
3772 {
3773 bfd_vma off;
3774 bfd_boolean dyn;
3775
3776 off = h->got.offset;
3777 BFD_ASSERT (off != (bfd_vma) -1);
3778 dyn = globals->root.dynamic_sections_created;
3779
3780 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3781 || (info->shared
3782 && SYMBOL_REFERENCES_LOCAL (info, h))
3783 || (ELF_ST_VISIBILITY (h->other)
3784 && h->root.type == bfd_link_hash_undefweak))
3785 {
3786 /* This is actually a static link, or it is a -Bsymbolic link
3787 and the symbol is defined locally. We must initialize this
3788 entry in the global offset table. Since the offset must
3789 always be a multiple of 4, we use the least significant bit
3790 to record whether we have initialized it already.
3791
3792 When doing a dynamic link, we create a .rel(a).got relocation
3793 entry to initialize the value. This is done in the
3794 finish_dynamic_symbol routine. */
3795 if ((off & 1) != 0)
3796 off &= ~1;
3797 else
3798 {
3799 /* If we are addressing a Thumb function, we need to
3800 adjust the address by one, so that attempts to
3801 call the function pointer will correctly
3802 interpret it as Thumb code. */
3803 if (sym_flags == STT_ARM_TFUNC)
3804 value |= 1;
3805
3806 bfd_put_32 (output_bfd, value, sgot->contents + off);
3807 h->got.offset |= 1;
3808 }
3809 }
3810 else
3811 *unresolved_reloc_p = FALSE;
3812
3813 value = sgot->output_offset + off;
3814 }
3815 else
3816 {
3817 bfd_vma off;
3818
3819 BFD_ASSERT (local_got_offsets != NULL &&
3820 local_got_offsets[r_symndx] != (bfd_vma) -1);
3821
3822 off = local_got_offsets[r_symndx];
3823
3824 /* The offset must always be a multiple of 4. We use the
3825 least significant bit to record whether we have already
3826 generated the necessary reloc. */
3827 if ((off & 1) != 0)
3828 off &= ~1;
3829 else
3830 {
3831 /* If we are addressing a Thumb function, we need to
3832 adjust the address by one, so that attempts to
3833 call the function pointer will correctly
3834 interpret it as Thumb code. */
3835 if (sym_flags == STT_ARM_TFUNC)
3836 value |= 1;
3837
3838 if (globals->use_rel)
3839 bfd_put_32 (output_bfd, value, sgot->contents + off);
3840
3841 if (info->shared)
3842 {
3843 asection * srelgot;
3844 Elf_Internal_Rela outrel;
3845 bfd_byte *loc;
3846
3847 srelgot = (bfd_get_section_by_name
3848 (dynobj, RELOC_SECTION (globals, ".got")));
3849 BFD_ASSERT (srelgot != NULL);
3850
3851 outrel.r_addend = addend + value;
3852 outrel.r_offset = (sgot->output_section->vma
3853 + sgot->output_offset
3854 + off);
3855 outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
3856 loc = srelgot->contents;
3857 loc += srelgot->reloc_count++ * RELOC_SIZE (globals);
3858 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3859 }
3860
3861 local_got_offsets[r_symndx] |= 1;
3862 }
3863
3864 value = sgot->output_offset + off;
3865 }
3866 if (r_type != R_ARM_GOT32)
3867 value += sgot->output_section->vma;
3868
3869 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3870 contents, rel->r_offset, value,
3871 rel->r_addend);
3872
3873 case R_ARM_TLS_LDO32:
3874 value = value - dtpoff_base (info);
3875
3876 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3877 contents, rel->r_offset, value,
3878 rel->r_addend);
3879
3880 case R_ARM_TLS_LDM32:
3881 {
3882 bfd_vma off;
3883
3884 if (globals->sgot == NULL)
3885 abort ();
3886
3887 off = globals->tls_ldm_got.offset;
3888
3889 if ((off & 1) != 0)
3890 off &= ~1;
3891 else
3892 {
3893 /* If we don't know the module number, create a relocation
3894 for it. */
3895 if (info->shared)
3896 {
3897 Elf_Internal_Rela outrel;
3898 bfd_byte *loc;
3899
3900 if (globals->srelgot == NULL)
3901 abort ();
3902
3903 outrel.r_addend = 0;
3904 outrel.r_offset = (globals->sgot->output_section->vma
3905 + globals->sgot->output_offset + off);
3906 outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32);
3907
3908 if (globals->use_rel)
3909 bfd_put_32 (output_bfd, outrel.r_addend,
3910 globals->sgot->contents + off);
3911
3912 loc = globals->srelgot->contents;
3913 loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals);
3914 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
3915 }
3916 else
3917 bfd_put_32 (output_bfd, 1, globals->sgot->contents + off);
3918
3919 globals->tls_ldm_got.offset |= 1;
3920 }
3921
3922 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
3923 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
3924
3925 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3926 contents, rel->r_offset, value,
3927 rel->r_addend);
3928 }
3929
3930 case R_ARM_TLS_GD32:
3931 case R_ARM_TLS_IE32:
3932 {
3933 bfd_vma off;
3934 int indx;
3935 char tls_type;
3936
3937 if (globals->sgot == NULL)
3938 abort ();
3939
3940 indx = 0;
3941 if (h != NULL)
3942 {
3943 bfd_boolean dyn;
3944 dyn = globals->root.dynamic_sections_created;
3945 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3946 && (!info->shared
3947 || !SYMBOL_REFERENCES_LOCAL (info, h)))
3948 {
3949 *unresolved_reloc_p = FALSE;
3950 indx = h->dynindx;
3951 }
3952 off = h->got.offset;
3953 tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type;
3954 }
3955 else
3956 {
3957 if (local_got_offsets == NULL)
3958 abort ();
3959 off = local_got_offsets[r_symndx];
3960 tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx];
3961 }
3962
3963 if (tls_type == GOT_UNKNOWN)
3964 abort ();
3965
3966 if ((off & 1) != 0)
3967 off &= ~1;
3968 else
3969 {
3970 bfd_boolean need_relocs = FALSE;
3971 Elf_Internal_Rela outrel;
3972 bfd_byte *loc = NULL;
3973 int cur_off = off;
3974
3975 /* The GOT entries have not been initialized yet. Do it
3976 now, and emit any relocations. If both an IE GOT and a
3977 GD GOT are necessary, we emit the GD first. */
3978
3979 if ((info->shared || indx != 0)
3980 && (h == NULL
3981 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3982 || h->root.type != bfd_link_hash_undefweak))
3983 {
3984 need_relocs = TRUE;
3985 if (globals->srelgot == NULL)
3986 abort ();
3987 loc = globals->srelgot->contents;
3988 loc += globals->srelgot->reloc_count * RELOC_SIZE (globals);
3989 }
3990
3991 if (tls_type & GOT_TLS_GD)
3992 {
3993 if (need_relocs)
3994 {
3995 outrel.r_addend = 0;
3996 outrel.r_offset = (globals->sgot->output_section->vma
3997 + globals->sgot->output_offset
3998 + cur_off);
3999 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32);
4000
4001 if (globals->use_rel)
4002 bfd_put_32 (output_bfd, outrel.r_addend,
4003 globals->sgot->contents + cur_off);
4004
4005 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4006 globals->srelgot->reloc_count++;
4007 loc += RELOC_SIZE (globals);
4008
4009 if (indx == 0)
4010 bfd_put_32 (output_bfd, value - dtpoff_base (info),
4011 globals->sgot->contents + cur_off + 4);
4012 else
4013 {
4014 outrel.r_addend = 0;
4015 outrel.r_info = ELF32_R_INFO (indx,
4016 R_ARM_TLS_DTPOFF32);
4017 outrel.r_offset += 4;
4018
4019 if (globals->use_rel)
4020 bfd_put_32 (output_bfd, outrel.r_addend,
4021 globals->sgot->contents + cur_off + 4);
4022
4023
4024 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4025 globals->srelgot->reloc_count++;
4026 loc += RELOC_SIZE (globals);
4027 }
4028 }
4029 else
4030 {
4031 /* If we are not emitting relocations for a
4032 general dynamic reference, then we must be in a
4033 static link or an executable link with the
4034 symbol binding locally. Mark it as belonging
4035 to module 1, the executable. */
4036 bfd_put_32 (output_bfd, 1,
4037 globals->sgot->contents + cur_off);
4038 bfd_put_32 (output_bfd, value - dtpoff_base (info),
4039 globals->sgot->contents + cur_off + 4);
4040 }
4041
4042 cur_off += 8;
4043 }
4044
4045 if (tls_type & GOT_TLS_IE)
4046 {
4047 if (need_relocs)
4048 {
4049 if (indx == 0)
4050 outrel.r_addend = value - dtpoff_base (info);
4051 else
4052 outrel.r_addend = 0;
4053 outrel.r_offset = (globals->sgot->output_section->vma
4054 + globals->sgot->output_offset
4055 + cur_off);
4056 outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32);
4057
4058 if (globals->use_rel)
4059 bfd_put_32 (output_bfd, outrel.r_addend,
4060 globals->sgot->contents + cur_off);
4061
4062 SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc);
4063 globals->srelgot->reloc_count++;
4064 loc += RELOC_SIZE (globals);
4065 }
4066 else
4067 bfd_put_32 (output_bfd, tpoff (info, value),
4068 globals->sgot->contents + cur_off);
4069 cur_off += 4;
4070 }
4071
4072 if (h != NULL)
4073 h->got.offset |= 1;
4074 else
4075 local_got_offsets[r_symndx] |= 1;
4076 }
4077
4078 if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32)
4079 off += 8;
4080 value = globals->sgot->output_section->vma + globals->sgot->output_offset + off
4081 - (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
4082
4083 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4084 contents, rel->r_offset, value,
4085 rel->r_addend);
4086 }
4087
4088 case R_ARM_TLS_LE32:
4089 if (info->shared)
4090 {
4091 (*_bfd_error_handler)
4092 (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"),
4093 input_bfd, input_section,
4094 (long) rel->r_offset, howto->name);
4095 return FALSE;
4096 }
4097 else
4098 value = tpoff (info, value);
4099
4100 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4101 contents, rel->r_offset, value,
4102 rel->r_addend);
4103
4104 case R_ARM_V4BX:
4105 if (globals->fix_v4bx)
4106 {
4107 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
4108
4109 /* Ensure that we have a BX instruction. */
4110 BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10);
4111
4112 /* Preserve Rm (lowest four bits) and the condition code
4113 (highest four bits). Other bits encode MOV PC,Rm. */
4114 insn = (insn & 0xf000000f) | 0x01a0f000;
4115
4116 bfd_put_32 (input_bfd, insn, hit_data);
4117 }
4118 return bfd_reloc_ok;
4119
4120 case R_ARM_MOVW_ABS_NC:
4121 case R_ARM_MOVT_ABS:
4122 case R_ARM_MOVW_PREL_NC:
4123 case R_ARM_MOVT_PREL:
4124 {
4125 bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
4126
4127 if (globals->use_rel)
4128 {
4129 addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
4130 signed_addend = (addend ^ 0x10000) - 0x10000;
4131 }
4132 value += signed_addend;
4133 if (sym_flags == STT_ARM_TFUNC)
4134 value |= 1;
4135
4136 if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
4137 value -= (input_section->output_section->vma
4138 + input_section->output_offset + rel->r_offset);
4139
4140 if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL)
4141 value >>= 16;
4142
4143 insn &= 0xfff0f000;
4144 insn |= value & 0xfff;
4145 insn |= (value & 0xf000) << 4;
4146 bfd_put_32 (input_bfd, insn, hit_data);
4147 }
4148 return bfd_reloc_ok;
4149
4150 case R_ARM_THM_MOVW_ABS_NC:
4151 case R_ARM_THM_MOVT_ABS:
4152 case R_ARM_THM_MOVW_PREL_NC:
4153 case R_ARM_THM_MOVT_PREL:
4154 {
4155 bfd_vma insn;
4156
4157 insn = bfd_get_16 (input_bfd, hit_data) << 16;
4158 insn |= bfd_get_16 (input_bfd, hit_data + 2);
4159
4160 if (globals->use_rel)
4161 {
4162 addend = ((insn >> 4) & 0xf000)
4163 | ((insn >> 15) & 0x0800)
4164 | ((insn >> 4) & 0x0700)
4165 | (insn & 0x00ff);
4166 signed_addend = (addend ^ 0x10000) - 0x10000;
4167 }
4168 value += signed_addend;
4169 if (sym_flags == STT_ARM_TFUNC)
4170 value |= 1;
4171
4172 if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL)
4173 value -= (input_section->output_section->vma
4174 + input_section->output_offset + rel->r_offset);
4175
4176 if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL)
4177 value >>= 16;
4178
4179 insn &= 0xfbf08f00;
4180 insn |= (value & 0xf000) << 4;
4181 insn |= (value & 0x0800) << 15;
4182 insn |= (value & 0x0700) << 4;
4183 insn |= (value & 0x00ff);
4184
4185 bfd_put_16 (input_bfd, insn >> 16, hit_data);
4186 bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2);
4187 }
4188 return bfd_reloc_ok;
4189
4190 default:
4191 return bfd_reloc_notsupported;
4192 }
4193 }
4194
4195
4196 static int
4197 uleb128_size (unsigned int i)
4198 {
4199 int size;
4200 size = 1;
4201 while (i >= 0x80)
4202 {
4203 i >>= 7;
4204 size++;
4205 }
4206 return size;
4207 }
4208
4209 /* Return TRUE if the attribute has the default value (0/""). */
4210 static bfd_boolean
4211 is_default_attr (aeabi_attribute *attr)
4212 {
4213 if ((attr->type & 1) && attr->i != 0)
4214 return FALSE;
4215 if ((attr->type & 2) && attr->s && *attr->s)
4216 return FALSE;
4217
4218 return TRUE;
4219 }
4220
4221 /* Return the size of a single attribute. */
4222 static bfd_vma
4223 eabi_attr_size(int tag, aeabi_attribute *attr)
4224 {
4225 bfd_vma size;
4226
4227 if (is_default_attr (attr))
4228 return 0;
4229
4230 size = uleb128_size (tag);
4231 if (attr->type & 1)
4232 size += uleb128_size (attr->i);
4233 if (attr->type & 2)
4234 size += strlen ((char *)attr->s) + 1;
4235 return size;
4236 }
4237
4238 /* Returns the size of the eabi object attributess section. */
4239 bfd_vma
4240 elf32_arm_eabi_attr_size (bfd *abfd)
4241 {
4242 bfd_vma size;
4243 aeabi_attribute *attr;
4244 aeabi_attribute_list *list;
4245 int i;
4246
4247 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
4248 size = 16; /* 'A' <size> "aeabi" 0x1 <size>. */
4249 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
4250 size += eabi_attr_size (i, &attr[i]);
4251
4252 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
4253 list;
4254 list = list->next)
4255 size += eabi_attr_size (list->tag, &list->attr);
4256
4257 return size;
4258 }
4259
4260 static bfd_byte *
4261 write_uleb128 (bfd_byte *p, unsigned int val)
4262 {
4263 bfd_byte c;
4264 do
4265 {
4266 c = val & 0x7f;
4267 val >>= 7;
4268 if (val)
4269 c |= 0x80;
4270 *(p++) = c;
4271 }
4272 while (val);
4273 return p;
4274 }
4275
4276 /* Write attribute ATTR to butter P, and return a pointer to the following
4277 byte. */
4278 static bfd_byte *
4279 write_eabi_attribute (bfd_byte *p, int tag, aeabi_attribute *attr)
4280 {
4281 /* Suppress default entries. */
4282 if (is_default_attr(attr))
4283 return p;
4284
4285 p = write_uleb128 (p, tag);
4286 if (attr->type & 1)
4287 p = write_uleb128 (p, attr->i);
4288 if (attr->type & 2)
4289 {
4290 int len;
4291
4292 len = strlen (attr->s) + 1;
4293 memcpy (p, attr->s, len);
4294 p += len;
4295 }
4296
4297 return p;
4298 }
4299
4300 /* Write the contents of the eabi attributes section to p. */
4301 void
4302 elf32_arm_set_eabi_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size)
4303 {
4304 bfd_byte *p;
4305 aeabi_attribute *attr;
4306 aeabi_attribute_list *list;
4307 int i;
4308
4309 p = contents;
4310 *(p++) = 'A';
4311 bfd_put_32 (abfd, size - 1, p);
4312 p += 4;
4313 memcpy (p, "aeabi", 6);
4314 p += 6;
4315 *(p++) = Tag_File;
4316 bfd_put_32 (abfd, size - 11, p);
4317 p += 4;
4318
4319 attr = elf32_arm_tdata (abfd)->known_eabi_attributes;
4320 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
4321 p = write_eabi_attribute (p, i, &attr[i]);
4322
4323 for (list = elf32_arm_tdata (abfd)->other_eabi_attributes;
4324 list;
4325 list = list->next)
4326 p = write_eabi_attribute (p, list->tag, &list->attr);
4327 }
4328
4329 /* Override final_link to handle EABI object attribute sections. */
4330
4331 static bfd_boolean
4332 elf32_arm_bfd_final_link (bfd *abfd, struct bfd_link_info *info)
4333 {
4334 asection *o;
4335 struct bfd_link_order *p;
4336 asection *attr_section = NULL;
4337 bfd_byte *contents;
4338 bfd_vma size = 0;
4339
4340 /* elf32_arm_merge_private_bfd_data will already have merged the
4341 object attributes. Remove the input sections from the link, and set
4342 the contents of the output secton. */
4343 for (o = abfd->sections; o != NULL; o = o->next)
4344 {
4345 if (strcmp (o->name, ".ARM.attributes") == 0)
4346 {
4347 for (p = o->map_head.link_order; p != NULL; p = p->next)
4348 {
4349 asection *input_section;
4350
4351 if (p->type != bfd_indirect_link_order)
4352 continue;
4353 input_section = p->u.indirect.section;
4354 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4355 elf_link_input_bfd ignores this section. */
4356 input_section->flags &= ~SEC_HAS_CONTENTS;
4357 }
4358
4359 size = elf32_arm_eabi_attr_size (abfd);
4360 bfd_set_section_size (abfd, o, size);
4361 attr_section = o;
4362 /* Skip this section later on. */
4363 o->map_head.link_order = NULL;
4364 }
4365 }
4366 /* Invoke the ELF linker to do all the work. */
4367 if (!bfd_elf_final_link (abfd, info))
4368 return FALSE;
4369
4370 if (attr_section)
4371 {
4372 contents = bfd_malloc(size);
4373 if (contents == NULL)
4374 return FALSE;
4375 elf32_arm_set_eabi_attr_contents (abfd, contents, size);
4376 bfd_set_section_contents (abfd, attr_section, contents, 0, size);
4377 free (contents);
4378 }
4379 return TRUE;
4380 }
4381
4382
4383 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
4384 static void
4385 arm_add_to_rel (bfd * abfd,
4386 bfd_byte * address,
4387 reloc_howto_type * howto,
4388 bfd_signed_vma increment)
4389 {
4390 bfd_signed_vma addend;
4391
4392 if (howto->type == R_ARM_THM_CALL)
4393 {
4394 int upper_insn, lower_insn;
4395 int upper, lower;
4396
4397 upper_insn = bfd_get_16 (abfd, address);
4398 lower_insn = bfd_get_16 (abfd, address + 2);
4399 upper = upper_insn & 0x7ff;
4400 lower = lower_insn & 0x7ff;
4401
4402 addend = (upper << 12) | (lower << 1);
4403 addend += increment;
4404 addend >>= 1;
4405
4406 upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
4407 lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
4408
4409 bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
4410 bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
4411 }
4412 else
4413 {
4414 bfd_vma contents;
4415
4416 contents = bfd_get_32 (abfd, address);
4417
4418 /* Get the (signed) value from the instruction. */
4419 addend = contents & howto->src_mask;
4420 if (addend & ((howto->src_mask + 1) >> 1))
4421 {
4422 bfd_signed_vma mask;
4423
4424 mask = -1;
4425 mask &= ~ howto->src_mask;
4426 addend |= mask;
4427 }
4428
4429 /* Add in the increment, (which is a byte value). */
4430 switch (howto->type)
4431 {
4432 default:
4433 addend += increment;
4434 break;
4435
4436 case R_ARM_PC24:
4437 case R_ARM_PLT32:
4438 case R_ARM_CALL:
4439 case R_ARM_JUMP24:
4440 addend <<= howto->size;
4441 addend += increment;
4442
4443 /* Should we check for overflow here ? */
4444
4445 /* Drop any undesired bits. */
4446 addend >>= howto->rightshift;
4447 break;
4448 }
4449
4450 contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
4451
4452 bfd_put_32 (abfd, contents, address);
4453 }
4454 }
4455
4456 #define IS_ARM_TLS_RELOC(R_TYPE) \
4457 ((R_TYPE) == R_ARM_TLS_GD32 \
4458 || (R_TYPE) == R_ARM_TLS_LDO32 \
4459 || (R_TYPE) == R_ARM_TLS_LDM32 \
4460 || (R_TYPE) == R_ARM_TLS_DTPOFF32 \
4461 || (R_TYPE) == R_ARM_TLS_DTPMOD32 \
4462 || (R_TYPE) == R_ARM_TLS_TPOFF32 \
4463 || (R_TYPE) == R_ARM_TLS_LE32 \
4464 || (R_TYPE) == R_ARM_TLS_IE32)
4465
4466 /* Relocate an ARM ELF section. */
4467 static bfd_boolean
4468 elf32_arm_relocate_section (bfd * output_bfd,
4469 struct bfd_link_info * info,
4470 bfd * input_bfd,
4471 asection * input_section,
4472 bfd_byte * contents,
4473 Elf_Internal_Rela * relocs,
4474 Elf_Internal_Sym * local_syms,
4475 asection ** local_sections)
4476 {
4477 Elf_Internal_Shdr *symtab_hdr;
4478 struct elf_link_hash_entry **sym_hashes;
4479 Elf_Internal_Rela *rel;
4480 Elf_Internal_Rela *relend;
4481 const char *name;
4482 struct elf32_arm_link_hash_table * globals;
4483
4484 globals = elf32_arm_hash_table (info);
4485 if (info->relocatable && !globals->use_rel)
4486 return TRUE;
4487
4488 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
4489 sym_hashes = elf_sym_hashes (input_bfd);
4490
4491 rel = relocs;
4492 relend = relocs + input_section->reloc_count;
4493 for (; rel < relend; rel++)
4494 {
4495 int r_type;
4496 reloc_howto_type * howto;
4497 unsigned long r_symndx;
4498 Elf_Internal_Sym * sym;
4499 asection * sec;
4500 struct elf_link_hash_entry * h;
4501 bfd_vma relocation;
4502 bfd_reloc_status_type r;
4503 arelent bfd_reloc;
4504 char sym_type;
4505 bfd_boolean unresolved_reloc = FALSE;
4506
4507 r_symndx = ELF32_R_SYM (rel->r_info);
4508 r_type = ELF32_R_TYPE (rel->r_info);
4509 r_type = arm_real_reloc_type (globals, r_type);
4510
4511 if ( r_type == R_ARM_GNU_VTENTRY
4512 || r_type == R_ARM_GNU_VTINHERIT)
4513 continue;
4514
4515 bfd_reloc.howto = elf32_arm_howto_from_type (r_type);
4516 howto = bfd_reloc.howto;
4517
4518 if (info->relocatable && globals->use_rel)
4519 {
4520 /* This is a relocatable link. We don't have to change
4521 anything, unless the reloc is against a section symbol,
4522 in which case we have to adjust according to where the
4523 section symbol winds up in the output section. */
4524 if (r_symndx < symtab_hdr->sh_info)
4525 {
4526 sym = local_syms + r_symndx;
4527 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4528 {
4529 sec = local_sections[r_symndx];
4530 arm_add_to_rel (input_bfd, contents + rel->r_offset,
4531 howto,
4532 (bfd_signed_vma) (sec->output_offset
4533 + sym->st_value));
4534 }
4535 }
4536
4537 continue;
4538 }
4539
4540 /* This is a final link. */
4541 h = NULL;
4542 sym = NULL;
4543 sec = NULL;
4544
4545 if (r_symndx < symtab_hdr->sh_info)
4546 {
4547 sym = local_syms + r_symndx;
4548 sym_type = ELF32_ST_TYPE (sym->st_info);
4549 sec = local_sections[r_symndx];
4550 if (globals->use_rel)
4551 {
4552 relocation = (sec->output_section->vma
4553 + sec->output_offset
4554 + sym->st_value);
4555 if ((sec->flags & SEC_MERGE)
4556 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4557 {
4558 asection *msec;
4559 bfd_vma addend, value;
4560
4561 if (howto->rightshift)
4562 {
4563 (*_bfd_error_handler)
4564 (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"),
4565 input_bfd, input_section,
4566 (long) rel->r_offset, howto->name);
4567 return FALSE;
4568 }
4569
4570 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
4571
4572 /* Get the (signed) value from the instruction. */
4573 addend = value & howto->src_mask;
4574 if (addend & ((howto->src_mask + 1) >> 1))
4575 {
4576 bfd_signed_vma mask;
4577
4578 mask = -1;
4579 mask &= ~ howto->src_mask;
4580 addend |= mask;
4581 }
4582 msec = sec;
4583 addend =
4584 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
4585 - relocation;
4586 addend += msec->output_section->vma + msec->output_offset;
4587 value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
4588 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
4589 }
4590 }
4591 else
4592 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4593 }
4594 else
4595 {
4596 bfd_boolean warned;
4597
4598 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4599 r_symndx, symtab_hdr, sym_hashes,
4600 h, sec, relocation,
4601 unresolved_reloc, warned);
4602
4603 sym_type = h->type;
4604 }
4605
4606 if (h != NULL)
4607 name = h->root.root.string;
4608 else
4609 {
4610 name = (bfd_elf_string_from_elf_section
4611 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4612 if (name == NULL || *name == '\0')
4613 name = bfd_section_name (input_bfd, sec);
4614 }
4615
4616 if (r_symndx != 0
4617 && r_type != R_ARM_NONE
4618 && (h == NULL
4619 || h->root.type == bfd_link_hash_defined
4620 || h->root.type == bfd_link_hash_defweak)
4621 && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS))
4622 {
4623 (*_bfd_error_handler)
4624 ((sym_type == STT_TLS
4625 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4626 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4627 input_bfd,
4628 input_section,
4629 (long) rel->r_offset,
4630 howto->name,
4631 name);
4632 }
4633
4634 r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
4635 input_section, contents, rel,
4636 relocation, info, sec, name,
4637 (h ? ELF_ST_TYPE (h->type) :
4638 ELF_ST_TYPE (sym->st_info)), h,
4639 &unresolved_reloc);
4640
4641 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4642 because such sections are not SEC_ALLOC and thus ld.so will
4643 not process them. */
4644 if (unresolved_reloc
4645 && !((input_section->flags & SEC_DEBUGGING) != 0
4646 && h->def_dynamic))
4647 {
4648 (*_bfd_error_handler)
4649 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4650 input_bfd,
4651 input_section,
4652 (long) rel->r_offset,
4653 howto->name,
4654 h->root.root.string);
4655 return FALSE;
4656 }
4657
4658 if (r != bfd_reloc_ok)
4659 {
4660 const char * msg = (const char *) 0;
4661
4662 switch (r)
4663 {
4664 case bfd_reloc_overflow:
4665 /* If the overflowing reloc was to an undefined symbol,
4666 we have already printed one error message and there
4667 is no point complaining again. */
4668 if ((! h ||
4669 h->root.type != bfd_link_hash_undefined)
4670 && (!((*info->callbacks->reloc_overflow)
4671 (info, (h ? &h->root : NULL), name, howto->name,
4672 (bfd_vma) 0, input_bfd, input_section,
4673 rel->r_offset))))
4674 return FALSE;
4675 break;
4676
4677 case bfd_reloc_undefined:
4678 if (!((*info->callbacks->undefined_symbol)
4679 (info, name, input_bfd, input_section,
4680 rel->r_offset, TRUE)))
4681 return FALSE;
4682 break;
4683
4684 case bfd_reloc_outofrange:
4685 msg = _("internal error: out of range error");
4686 goto common_error;
4687
4688 case bfd_reloc_notsupported:
4689 msg = _("internal error: unsupported relocation error");
4690 goto common_error;
4691
4692 case bfd_reloc_dangerous:
4693 msg = _("internal error: dangerous error");
4694 goto common_error;
4695
4696 default:
4697 msg = _("internal error: unknown error");
4698 /* fall through */
4699
4700 common_error:
4701 if (!((*info->callbacks->warning)
4702 (info, msg, name, input_bfd, input_section,
4703 rel->r_offset)))
4704 return FALSE;
4705 break;
4706 }
4707 }
4708 }
4709
4710 return TRUE;
4711 }
4712
4713 /* Allocate/find an object attribute. */
4714 static aeabi_attribute *
4715 elf32_arm_new_eabi_attr (bfd *abfd, int tag)
4716 {
4717 aeabi_attribute *attr;
4718 aeabi_attribute_list *list;
4719 aeabi_attribute_list *p;
4720 aeabi_attribute_list **lastp;
4721
4722
4723 if (tag < NUM_KNOWN_ATTRIBUTES)
4724 {
4725 /* Knwon tags are preallocated. */
4726 attr = &elf32_arm_tdata (abfd)->known_eabi_attributes[tag];
4727 }
4728 else
4729 {
4730 /* Create a new tag. */
4731 list = (aeabi_attribute_list *)
4732 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
4733 memset (list, 0, sizeof (aeabi_attribute_list));
4734 list->tag = tag;
4735 /* Keep the tag list in order. */
4736 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
4737 for (p = *lastp; p; p = p->next)
4738 {
4739 if (tag < p->tag)
4740 break;
4741 lastp = &p->next;
4742 }
4743 list->next = *lastp;
4744 *lastp = list;
4745 attr = &list->attr;
4746 }
4747
4748 return attr;
4749 }
4750
4751 int
4752 elf32_arm_get_eabi_attr_int (bfd *abfd, int tag)
4753 {
4754 aeabi_attribute_list *p;
4755
4756 if (tag < NUM_KNOWN_ATTRIBUTES)
4757 {
4758 /* Knwon tags are preallocated. */
4759 return elf32_arm_tdata (abfd)->known_eabi_attributes[tag].i;
4760 }
4761 else
4762 {
4763 for (p = elf32_arm_tdata (abfd)->other_eabi_attributes;
4764 p;
4765 p = p->next)
4766 {
4767 if (tag == p->tag)
4768 return p->attr.i;
4769 if (tag < p->tag)
4770 break;
4771 }
4772 return 0;
4773 }
4774 }
4775
4776 void
4777 elf32_arm_add_eabi_attr_int (bfd *abfd, int tag, unsigned int i)
4778 {
4779 aeabi_attribute *attr;
4780
4781 attr = elf32_arm_new_eabi_attr (abfd, tag);
4782 attr->type = 1;
4783 attr->i = i;
4784 }
4785
4786 static char *
4787 attr_strdup (bfd *abfd, const char * s)
4788 {
4789 char * p;
4790 int len;
4791
4792 len = strlen (s) + 1;
4793 p = (char *)bfd_alloc(abfd, len);
4794 return memcpy (p, s, len);
4795 }
4796
4797 void
4798 elf32_arm_add_eabi_attr_string (bfd *abfd, int tag, const char *s)
4799 {
4800 aeabi_attribute *attr;
4801
4802 attr = elf32_arm_new_eabi_attr (abfd, tag);
4803 attr->type = 2;
4804 attr->s = attr_strdup (abfd, s);
4805 }
4806
4807 void
4808 elf32_arm_add_eabi_attr_compat (bfd *abfd, unsigned int i, const char *s)
4809 {
4810 aeabi_attribute_list *list;
4811 aeabi_attribute_list *p;
4812 aeabi_attribute_list **lastp;
4813
4814 list = (aeabi_attribute_list *)
4815 bfd_alloc (abfd, sizeof (aeabi_attribute_list));
4816 memset (list, 0, sizeof (aeabi_attribute_list));
4817 list->tag = Tag_compatibility;
4818 list->attr.type = 3;
4819 list->attr.i = i;
4820 list->attr.s = attr_strdup (abfd, s);
4821
4822 lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes;
4823 for (p = *lastp; p; p = p->next)
4824 {
4825 int cmp;
4826 if (p->tag != Tag_compatibility)
4827 break;
4828 cmp = strcmp(s, p->attr.s);
4829 if (cmp < 0 || (cmp == 0 && i < p->attr.i))
4830 break;
4831 lastp = &p->next;
4832 }
4833 list->next = *lastp;
4834 *lastp = list;
4835 }
4836
4837 /* Set the right machine number. */
4838
4839 static bfd_boolean
4840 elf32_arm_object_p (bfd *abfd)
4841 {
4842 unsigned int mach;
4843
4844 mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
4845
4846 if (mach != bfd_mach_arm_unknown)
4847 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
4848
4849 else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
4850 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
4851
4852 else
4853 bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
4854
4855 return TRUE;
4856 }
4857
4858 /* Function to keep ARM specific flags in the ELF header. */
4859
4860 static bfd_boolean
4861 elf32_arm_set_private_flags (bfd *abfd, flagword flags)
4862 {
4863 if (elf_flags_init (abfd)
4864 && elf_elfheader (abfd)->e_flags != flags)
4865 {
4866 if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
4867 {
4868 if (flags & EF_ARM_INTERWORK)
4869 (*_bfd_error_handler)
4870 (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"),
4871 abfd);
4872 else
4873 _bfd_error_handler
4874 (_("Warning: Clearing the interworking flag of %B due to outside request"),
4875 abfd);
4876 }
4877 }
4878 else
4879 {
4880 elf_elfheader (abfd)->e_flags = flags;
4881 elf_flags_init (abfd) = TRUE;
4882 }
4883
4884 return TRUE;
4885 }
4886
4887 /* Copy the eabi object attribute from IBFD to OBFD. */
4888 static void
4889 copy_eabi_attributes (bfd *ibfd, bfd *obfd)
4890 {
4891 aeabi_attribute *in_attr;
4892 aeabi_attribute *out_attr;
4893 aeabi_attribute_list *list;
4894 int i;
4895
4896 in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
4897 out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
4898 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
4899 {
4900 out_attr->i = in_attr->i;
4901 if (in_attr->s && *in_attr->s)
4902 out_attr->s = attr_strdup (obfd, in_attr->s);
4903 in_attr++;
4904 out_attr++;
4905 }
4906
4907 for (list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
4908 list;
4909 list = list->next)
4910 {
4911 in_attr = &list->attr;
4912 switch (in_attr->type)
4913 {
4914 case 1:
4915 elf32_arm_add_eabi_attr_int (obfd, list->tag, in_attr->i);
4916 break;
4917 case 2:
4918 elf32_arm_add_eabi_attr_string (obfd, list->tag, in_attr->s);
4919 break;
4920 case 3:
4921 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
4922 break;
4923 default:
4924 abort();
4925 }
4926 }
4927 }
4928
4929
4930 /* Copy backend specific data from one object module to another. */
4931
4932 static bfd_boolean
4933 elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4934 {
4935 flagword in_flags;
4936 flagword out_flags;
4937
4938 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4939 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4940 return TRUE;
4941
4942 in_flags = elf_elfheader (ibfd)->e_flags;
4943 out_flags = elf_elfheader (obfd)->e_flags;
4944
4945 if (elf_flags_init (obfd)
4946 && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
4947 && in_flags != out_flags)
4948 {
4949 /* Cannot mix APCS26 and APCS32 code. */
4950 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
4951 return FALSE;
4952
4953 /* Cannot mix float APCS and non-float APCS code. */
4954 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
4955 return FALSE;
4956
4957 /* If the src and dest have different interworking flags
4958 then turn off the interworking bit. */
4959 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
4960 {
4961 if (out_flags & EF_ARM_INTERWORK)
4962 _bfd_error_handler
4963 (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"),
4964 obfd, ibfd);
4965
4966 in_flags &= ~EF_ARM_INTERWORK;
4967 }
4968
4969 /* Likewise for PIC, though don't warn for this case. */
4970 if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
4971 in_flags &= ~EF_ARM_PIC;
4972 }
4973
4974 elf_elfheader (obfd)->e_flags = in_flags;
4975 elf_flags_init (obfd) = TRUE;
4976
4977 /* Also copy the EI_OSABI field. */
4978 elf_elfheader (obfd)->e_ident[EI_OSABI] =
4979 elf_elfheader (ibfd)->e_ident[EI_OSABI];
4980
4981 /* Copy EABI object attributes. */
4982 copy_eabi_attributes (ibfd, obfd);
4983
4984 return TRUE;
4985 }
4986
4987 /* Values for Tag_ABI_PCS_R9_use. */
4988 enum
4989 {
4990 AEABI_R9_V6,
4991 AEABI_R9_SB,
4992 AEABI_R9_TLS,
4993 AEABI_R9_unused
4994 };
4995
4996 /* Values for Tag_ABI_PCS_RW_data. */
4997 enum
4998 {
4999 AEABI_PCS_RW_data_absolute,
5000 AEABI_PCS_RW_data_PCrel,
5001 AEABI_PCS_RW_data_SBrel,
5002 AEABI_PCS_RW_data_unused
5003 };
5004
5005 /* Values for Tag_ABI_enum_size. */
5006 enum
5007 {
5008 AEABI_enum_unused,
5009 AEABI_enum_short,
5010 AEABI_enum_wide,
5011 AEABI_enum_forced_wide
5012 };
5013
5014 /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there
5015 are conflicting attributes. */
5016 static bfd_boolean
5017 elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
5018 {
5019 aeabi_attribute *in_attr;
5020 aeabi_attribute *out_attr;
5021 aeabi_attribute_list *in_list;
5022 aeabi_attribute_list *out_list;
5023 /* Some tags have 0 = don't care, 1 = strong requirement,
5024 2 = weak requirement. */
5025 static const int order_312[3] = {3, 1, 2};
5026 int i;
5027
5028 if (!elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i)
5029 {
5030 /* This is the first object. Copy the attributes. */
5031 copy_eabi_attributes (ibfd, obfd);
5032 return TRUE;
5033 }
5034
5035 /* Use the Tag_null value to indicate the attributes have been
5036 initialized. */
5037 elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i = 1;
5038
5039 in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes;
5040 out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes;
5041 /* This needs to happen before Tag_ABI_FP_number_model is merged. */
5042 if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i)
5043 {
5044 /* Ignore mismatches if teh object doesn't use floating point. */
5045 if (out_attr[Tag_ABI_FP_number_model].i == 0)
5046 out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i;
5047 else if (in_attr[Tag_ABI_FP_number_model].i != 0)
5048 {
5049 _bfd_error_handler
5050 (_("ERROR: %B uses VFP register arguments, %B does not"),
5051 ibfd, obfd);
5052 return FALSE;
5053 }
5054 }
5055
5056 for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++)
5057 {
5058 /* Merge this attribute with existing attributes. */
5059 switch (i)
5060 {
5061 case Tag_CPU_raw_name:
5062 case Tag_CPU_name:
5063 /* Use whichever has the greatest architecture requirements. */
5064 if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i)
5065 out_attr[i].s = attr_strdup(obfd, in_attr[i].s);
5066 break;
5067
5068 case Tag_ABI_optimization_goals:
5069 case Tag_ABI_FP_optimization_goals:
5070 /* Use the first value seen. */
5071 break;
5072
5073 case Tag_CPU_arch:
5074 case Tag_ARM_ISA_use:
5075 case Tag_THUMB_ISA_use:
5076 case Tag_VFP_arch:
5077 case Tag_WMMX_arch:
5078 case Tag_NEON_arch:
5079 /* ??? Do NEON and WMMX conflict? */
5080 case Tag_ABI_FP_rounding:
5081 case Tag_ABI_FP_denormal:
5082 case Tag_ABI_FP_exceptions:
5083 case Tag_ABI_FP_user_exceptions:
5084 case Tag_ABI_FP_number_model:
5085 case Tag_ABI_align8_preserved:
5086 case Tag_ABI_HardFP_use:
5087 /* Use the largest value specified. */
5088 if (in_attr[i].i > out_attr[i].i)
5089 out_attr[i].i = in_attr[i].i;
5090 break;
5091
5092 case Tag_CPU_arch_profile:
5093 /* Warn if conflicting architecture profiles used. */
5094 if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i)
5095 {
5096 _bfd_error_handler
5097 (_("ERROR: %B: Conflicting architecture profiles %c/%c"),
5098 ibfd, in_attr[i].i, out_attr[i].i);
5099 return FALSE;
5100 }
5101 if (in_attr[i].i)
5102 out_attr[i].i = in_attr[i].i;
5103 break;
5104 case Tag_PCS_config:
5105 if (out_attr[i].i == 0)
5106 out_attr[i].i = in_attr[i].i;
5107 else if (in_attr[i].i != 0 && out_attr[i].i != 0)
5108 {
5109 /* It's sometimes ok to mix different configs, so this is only
5110 a warning. */
5111 _bfd_error_handler
5112 (_("Warning: %B: Conflicting platform configuration"), ibfd);
5113 }
5114 break;
5115 case Tag_ABI_PCS_R9_use:
5116 if (out_attr[i].i != AEABI_R9_unused
5117 && in_attr[i].i != AEABI_R9_unused)
5118 {
5119 _bfd_error_handler
5120 (_("ERROR: %B: Conflicting use of R9"), ibfd);
5121 return FALSE;
5122 }
5123 if (out_attr[i].i == AEABI_R9_unused)
5124 out_attr[i].i = in_attr[i].i;
5125 break;
5126 case Tag_ABI_PCS_RW_data:
5127 if (in_attr[i].i == AEABI_PCS_RW_data_SBrel
5128 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB
5129 && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused)
5130 {
5131 _bfd_error_handler
5132 (_("ERROR: %B: SB relative addressing conflicts with use of R9"),
5133 ibfd);
5134 return FALSE;
5135 }
5136 /* Use the smallest value specified. */
5137 if (in_attr[i].i < out_attr[i].i)
5138 out_attr[i].i = in_attr[i].i;
5139 break;
5140 case Tag_ABI_PCS_RO_data:
5141 /* Use the smallest value specified. */
5142 if (in_attr[i].i < out_attr[i].i)
5143 out_attr[i].i = in_attr[i].i;
5144 break;
5145 case Tag_ABI_PCS_GOT_use:
5146 if (in_attr[i].i > 2 || out_attr[i].i > 2
5147 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
5148 out_attr[i].i = in_attr[i].i;
5149 break;
5150 case Tag_ABI_PCS_wchar_t:
5151 if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
5152 {
5153 _bfd_error_handler
5154 (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
5155 return FALSE;
5156 }
5157 if (in_attr[i].i)
5158 out_attr[i].i = in_attr[i].i;
5159 break;
5160 case Tag_ABI_align8_needed:
5161 /* ??? Check against Tag_ABI_align8_preserved. */
5162 if (in_attr[i].i > 2 || out_attr[i].i > 2
5163 || order_312[in_attr[i].i] < order_312[out_attr[i].i])
5164 out_attr[i].i = in_attr[i].i;
5165 break;
5166 case Tag_ABI_enum_size:
5167 if (in_attr[i].i != AEABI_enum_unused)
5168 {
5169 if (out_attr[i].i == AEABI_enum_unused
5170 || out_attr[i].i == AEABI_enum_forced_wide)
5171 {
5172 /* The existing object is compatible with anything.
5173 Use whatever requirements the new object has. */
5174 out_attr[i].i = in_attr[i].i;
5175 }
5176 else if (in_attr[i].i != AEABI_enum_forced_wide
5177 && out_attr[i].i != in_attr[i].i)
5178 {
5179 _bfd_error_handler
5180 (_("ERROR: %B: Conflicting enum sizes"), ibfd);
5181 }
5182 }
5183 break;
5184 case Tag_ABI_VFP_args:
5185 /* Aready done. */
5186 break;
5187 case Tag_ABI_WMMX_args:
5188 if (in_attr[i].i != out_attr[i].i)
5189 {
5190 _bfd_error_handler
5191 (_("ERROR: %B uses iWMMXt register arguments, %B does not"),
5192 ibfd, obfd);
5193 return FALSE;
5194 }
5195 break;
5196 default: /* All known attributes should be explicitly covered. */
5197 abort ();
5198 }
5199 }
5200
5201 in_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
5202 out_list = elf32_arm_tdata (ibfd)->other_eabi_attributes;
5203 while (in_list && in_list->tag == Tag_compatibility)
5204 {
5205 in_attr = &in_list->attr;
5206 if (in_attr->i == 0)
5207 continue;
5208 if (in_attr->i == 1)
5209 {
5210 _bfd_error_handler
5211 (_("ERROR: %B: Must be processed by '%s' toolchain"),
5212 ibfd, in_attr->s);
5213 return FALSE;
5214 }
5215 if (!out_list || out_list->tag != Tag_compatibility
5216 || strcmp (in_attr->s, out_list->attr.s) != 0)
5217 {
5218 /* Add this compatibility tag to the output. */
5219 elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s);
5220 continue;
5221 }
5222 out_attr = &out_list->attr;
5223 /* Check all the input tags with the same identifier. */
5224 for (;;)
5225 {
5226 if (out_list->tag != Tag_compatibility
5227 || in_attr->i != out_attr->i
5228 || strcmp (in_attr->s, out_attr->s) != 0)
5229 {
5230 _bfd_error_handler
5231 (_("ERROR: %B: Incompatible object tag '%s':%d"),
5232 ibfd, in_attr->s, in_attr->i);
5233 return FALSE;
5234 }
5235 in_list = in_list->next;
5236 if (in_list->tag != Tag_compatibility
5237 || strcmp (in_attr->s, in_list->attr.s) != 0)
5238 break;
5239 in_attr = &in_list->attr;
5240 out_list = out_list->next;
5241 if (out_list)
5242 out_attr = &out_list->attr;
5243 }
5244
5245 /* Check the output doesn't have extra tags with this identifier. */
5246 if (out_list && out_list->tag == Tag_compatibility
5247 && strcmp (in_attr->s, out_list->attr.s) == 0)
5248 {
5249 _bfd_error_handler
5250 (_("ERROR: %B: Incompatible object tag '%s':%d"),
5251 ibfd, in_attr->s, out_list->attr.i);
5252 return FALSE;
5253 }
5254 }
5255
5256 for (; in_list; in_list = in_list->next)
5257 {
5258 if ((in_list->tag & 128) < 64)
5259 {
5260 _bfd_error_handler
5261 (_("Warning: %B: Unknown EABI object attribute %d"),
5262 ibfd, in_list->tag);
5263 break;
5264 }
5265 }
5266 return TRUE;
5267 }
5268
5269
5270 /* Return TRUE if the two EABI versions are incompatible. */
5271
5272 static bfd_boolean
5273 elf32_arm_versions_compatible (unsigned iver, unsigned over)
5274 {
5275 /* v4 and v5 are the same spec before and after it was released,
5276 so allow mixing them. */
5277 if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5)
5278 || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4))
5279 return TRUE;
5280
5281 return (iver == over);
5282 }
5283
5284 /* Merge backend specific data from an object file to the output
5285 object file when linking. */
5286
5287 static bfd_boolean
5288 elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
5289 {
5290 flagword out_flags;
5291 flagword in_flags;
5292 bfd_boolean flags_compatible = TRUE;
5293 asection *sec;
5294
5295 /* Check if we have the same endianess. */
5296 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
5297 return FALSE;
5298
5299 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5300 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5301 return TRUE;
5302
5303 if (!elf32_arm_merge_eabi_attributes (ibfd, obfd))
5304 return FALSE;
5305
5306 /* The input BFD must have had its flags initialised. */
5307 /* The following seems bogus to me -- The flags are initialized in
5308 the assembler but I don't think an elf_flags_init field is
5309 written into the object. */
5310 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5311
5312 in_flags = elf_elfheader (ibfd)->e_flags;
5313 out_flags = elf_elfheader (obfd)->e_flags;
5314
5315 if (!elf_flags_init (obfd))
5316 {
5317 /* If the input is the default architecture and had the default
5318 flags then do not bother setting the flags for the output
5319 architecture, instead allow future merges to do this. If no
5320 future merges ever set these flags then they will retain their
5321 uninitialised values, which surprise surprise, correspond
5322 to the default values. */
5323 if (bfd_get_arch_info (ibfd)->the_default
5324 && elf_elfheader (ibfd)->e_flags == 0)
5325 return TRUE;
5326
5327 elf_flags_init (obfd) = TRUE;
5328 elf_elfheader (obfd)->e_flags = in_flags;
5329
5330 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
5331 && bfd_get_arch_info (obfd)->the_default)
5332 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
5333
5334 return TRUE;
5335 }
5336
5337 /* Determine what should happen if the input ARM architecture
5338 does not match the output ARM architecture. */
5339 if (! bfd_arm_merge_machines (ibfd, obfd))
5340 return FALSE;
5341
5342 /* Identical flags must be compatible. */
5343 if (in_flags == out_flags)
5344 return TRUE;
5345
5346 /* Check to see if the input BFD actually contains any sections. If
5347 not, its flags may not have been initialised either, but it
5348 cannot actually cause any incompatiblity. Do not short-circuit
5349 dynamic objects; their section list may be emptied by
5350 elf_link_add_object_symbols.
5351
5352 Also check to see if there are no code sections in the input.
5353 In this case there is no need to check for code specific flags.
5354 XXX - do we need to worry about floating-point format compatability
5355 in data sections ? */
5356 if (!(ibfd->flags & DYNAMIC))
5357 {
5358 bfd_boolean null_input_bfd = TRUE;
5359 bfd_boolean only_data_sections = TRUE;
5360
5361 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5362 {
5363 /* Ignore synthetic glue sections. */
5364 if (strcmp (sec->name, ".glue_7")
5365 && strcmp (sec->name, ".glue_7t"))
5366 {
5367 if ((bfd_get_section_flags (ibfd, sec)
5368 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5369 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5370 only_data_sections = FALSE;
5371
5372 null_input_bfd = FALSE;
5373 break;
5374 }
5375 }
5376
5377 if (null_input_bfd || only_data_sections)
5378 return TRUE;
5379 }
5380
5381 /* Complain about various flag mismatches. */
5382 if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags),
5383 EF_ARM_EABI_VERSION (out_flags)))
5384 {
5385 _bfd_error_handler
5386 (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"),
5387 ibfd, obfd,
5388 (in_flags & EF_ARM_EABIMASK) >> 24,
5389 (out_flags & EF_ARM_EABIMASK) >> 24);
5390 return FALSE;
5391 }
5392
5393 /* Not sure what needs to be checked for EABI versions >= 1. */
5394 /* VxWorks libraries do not use these flags. */
5395 if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed
5396 && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed
5397 && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
5398 {
5399 if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
5400 {
5401 _bfd_error_handler
5402 (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"),
5403 ibfd, obfd,
5404 in_flags & EF_ARM_APCS_26 ? 26 : 32,
5405 out_flags & EF_ARM_APCS_26 ? 26 : 32);
5406 flags_compatible = FALSE;
5407 }
5408
5409 if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
5410 {
5411 if (in_flags & EF_ARM_APCS_FLOAT)
5412 _bfd_error_handler
5413 (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"),
5414 ibfd, obfd);
5415 else
5416 _bfd_error_handler
5417 (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"),
5418 ibfd, obfd);
5419
5420 flags_compatible = FALSE;
5421 }
5422
5423 if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
5424 {
5425 if (in_flags & EF_ARM_VFP_FLOAT)
5426 _bfd_error_handler
5427 (_("ERROR: %B uses VFP instructions, whereas %B does not"),
5428 ibfd, obfd);
5429 else
5430 _bfd_error_handler
5431 (_("ERROR: %B uses FPA instructions, whereas %B does not"),
5432 ibfd, obfd);
5433
5434 flags_compatible = FALSE;
5435 }
5436
5437 if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
5438 {
5439 if (in_flags & EF_ARM_MAVERICK_FLOAT)
5440 _bfd_error_handler
5441 (_("ERROR: %B uses Maverick instructions, whereas %B does not"),
5442 ibfd, obfd);
5443 else
5444 _bfd_error_handler
5445 (_("ERROR: %B does not use Maverick instructions, whereas %B does"),
5446 ibfd, obfd);
5447
5448 flags_compatible = FALSE;
5449 }
5450
5451 #ifdef EF_ARM_SOFT_FLOAT
5452 if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
5453 {
5454 /* We can allow interworking between code that is VFP format
5455 layout, and uses either soft float or integer regs for
5456 passing floating point arguments and results. We already
5457 know that the APCS_FLOAT flags match; similarly for VFP
5458 flags. */
5459 if ((in_flags & EF_ARM_APCS_FLOAT) != 0
5460 || (in_flags & EF_ARM_VFP_FLOAT) == 0)
5461 {
5462 if (in_flags & EF_ARM_SOFT_FLOAT)
5463 _bfd_error_handler
5464 (_("ERROR: %B uses software FP, whereas %B uses hardware FP"),
5465 ibfd, obfd);
5466 else
5467 _bfd_error_handler
5468 (_("ERROR: %B uses hardware FP, whereas %B uses software FP"),
5469 ibfd, obfd);
5470
5471 flags_compatible = FALSE;
5472 }
5473 }
5474 #endif
5475
5476 /* Interworking mismatch is only a warning. */
5477 if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
5478 {
5479 if (in_flags & EF_ARM_INTERWORK)
5480 {
5481 _bfd_error_handler
5482 (_("Warning: %B supports interworking, whereas %B does not"),
5483 ibfd, obfd);
5484 }
5485 else
5486 {
5487 _bfd_error_handler
5488 (_("Warning: %B does not support interworking, whereas %B does"),
5489 ibfd, obfd);
5490 }
5491 }
5492 }
5493
5494 return flags_compatible;
5495 }
5496
5497 /* Display the flags field. */
5498
5499 static bfd_boolean
5500 elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr)
5501 {
5502 FILE * file = (FILE *) ptr;
5503 unsigned long flags;
5504
5505 BFD_ASSERT (abfd != NULL && ptr != NULL);
5506
5507 /* Print normal ELF private data. */
5508 _bfd_elf_print_private_bfd_data (abfd, ptr);
5509
5510 flags = elf_elfheader (abfd)->e_flags;
5511 /* Ignore init flag - it may not be set, despite the flags field
5512 containing valid data. */
5513
5514 /* xgettext:c-format */
5515 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5516
5517 switch (EF_ARM_EABI_VERSION (flags))
5518 {
5519 case EF_ARM_EABI_UNKNOWN:
5520 /* The following flag bits are GNU extensions and not part of the
5521 official ARM ELF extended ABI. Hence they are only decoded if
5522 the EABI version is not set. */
5523 if (flags & EF_ARM_INTERWORK)
5524 fprintf (file, _(" [interworking enabled]"));
5525
5526 if (flags & EF_ARM_APCS_26)
5527 fprintf (file, " [APCS-26]");
5528 else
5529 fprintf (file, " [APCS-32]");
5530
5531 if (flags & EF_ARM_VFP_FLOAT)
5532 fprintf (file, _(" [VFP float format]"));
5533 else if (flags & EF_ARM_MAVERICK_FLOAT)
5534 fprintf (file, _(" [Maverick float format]"));
5535 else
5536 fprintf (file, _(" [FPA float format]"));
5537
5538 if (flags & EF_ARM_APCS_FLOAT)
5539 fprintf (file, _(" [floats passed in float registers]"));
5540
5541 if (flags & EF_ARM_PIC)
5542 fprintf (file, _(" [position independent]"));
5543
5544 if (flags & EF_ARM_NEW_ABI)
5545 fprintf (file, _(" [new ABI]"));
5546
5547 if (flags & EF_ARM_OLD_ABI)
5548 fprintf (file, _(" [old ABI]"));
5549
5550 if (flags & EF_ARM_SOFT_FLOAT)
5551 fprintf (file, _(" [software FP]"));
5552
5553 flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
5554 | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
5555 | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
5556 | EF_ARM_MAVERICK_FLOAT);
5557 break;
5558
5559 case EF_ARM_EABI_VER1:
5560 fprintf (file, _(" [Version1 EABI]"));
5561
5562 if (flags & EF_ARM_SYMSARESORTED)
5563 fprintf (file, _(" [sorted symbol table]"));
5564 else
5565 fprintf (file, _(" [unsorted symbol table]"));
5566
5567 flags &= ~ EF_ARM_SYMSARESORTED;
5568 break;
5569
5570 case EF_ARM_EABI_VER2:
5571 fprintf (file, _(" [Version2 EABI]"));
5572
5573 if (flags & EF_ARM_SYMSARESORTED)
5574 fprintf (file, _(" [sorted symbol table]"));
5575 else
5576 fprintf (file, _(" [unsorted symbol table]"));
5577
5578 if (flags & EF_ARM_DYNSYMSUSESEGIDX)
5579 fprintf (file, _(" [dynamic symbols use segment index]"));
5580
5581 if (flags & EF_ARM_MAPSYMSFIRST)
5582 fprintf (file, _(" [mapping symbols precede others]"));
5583
5584 flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
5585 | EF_ARM_MAPSYMSFIRST);
5586 break;
5587
5588 case EF_ARM_EABI_VER3:
5589 fprintf (file, _(" [Version3 EABI]"));
5590 break;
5591
5592 case EF_ARM_EABI_VER4:
5593 fprintf (file, _(" [Version4 EABI]"));
5594 goto eabi;
5595
5596 case EF_ARM_EABI_VER5:
5597 fprintf (file, _(" [Version5 EABI]"));
5598 eabi:
5599 if (flags & EF_ARM_BE8)
5600 fprintf (file, _(" [BE8]"));
5601
5602 if (flags & EF_ARM_LE8)
5603 fprintf (file, _(" [LE8]"));
5604
5605 flags &= ~(EF_ARM_LE8 | EF_ARM_BE8);
5606 break;
5607
5608 default:
5609 fprintf (file, _(" <EABI version unrecognised>"));
5610 break;
5611 }
5612
5613 flags &= ~ EF_ARM_EABIMASK;
5614
5615 if (flags & EF_ARM_RELEXEC)
5616 fprintf (file, _(" [relocatable executable]"));
5617
5618 if (flags & EF_ARM_HASENTRY)
5619 fprintf (file, _(" [has entry point]"));
5620
5621 flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
5622
5623 if (flags)
5624 fprintf (file, _("<Unrecognised flag bits set>"));
5625
5626 fputc ('\n', file);
5627
5628 return TRUE;
5629 }
5630
5631 static int
5632 elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type)
5633 {
5634 switch (ELF_ST_TYPE (elf_sym->st_info))
5635 {
5636 case STT_ARM_TFUNC:
5637 return ELF_ST_TYPE (elf_sym->st_info);
5638
5639 case STT_ARM_16BIT:
5640 /* If the symbol is not an object, return the STT_ARM_16BIT flag.
5641 This allows us to distinguish between data used by Thumb instructions
5642 and non-data (which is probably code) inside Thumb regions of an
5643 executable. */
5644 if (type != STT_OBJECT && type != STT_TLS)
5645 return ELF_ST_TYPE (elf_sym->st_info);
5646 break;
5647
5648 default:
5649 break;
5650 }
5651
5652 return type;
5653 }
5654
5655 static asection *
5656 elf32_arm_gc_mark_hook (asection * sec,
5657 struct bfd_link_info * info ATTRIBUTE_UNUSED,
5658 Elf_Internal_Rela * rel,
5659 struct elf_link_hash_entry * h,
5660 Elf_Internal_Sym * sym)
5661 {
5662 if (h != NULL)
5663 {
5664 switch (ELF32_R_TYPE (rel->r_info))
5665 {
5666 case R_ARM_GNU_VTINHERIT:
5667 case R_ARM_GNU_VTENTRY:
5668 break;
5669
5670 default:
5671 switch (h->root.type)
5672 {
5673 case bfd_link_hash_defined:
5674 case bfd_link_hash_defweak:
5675 return h->root.u.def.section;
5676
5677 case bfd_link_hash_common:
5678 return h->root.u.c.p->section;
5679
5680 default:
5681 break;
5682 }
5683 }
5684 }
5685 else
5686 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5687
5688 return NULL;
5689 }
5690
5691 /* Update the got entry reference counts for the section being removed. */
5692
5693 static bfd_boolean
5694 elf32_arm_gc_sweep_hook (bfd * abfd,
5695 struct bfd_link_info * info,
5696 asection * sec,
5697 const Elf_Internal_Rela * relocs)
5698 {
5699 Elf_Internal_Shdr *symtab_hdr;
5700 struct elf_link_hash_entry **sym_hashes;
5701 bfd_signed_vma *local_got_refcounts;
5702 const Elf_Internal_Rela *rel, *relend;
5703 struct elf32_arm_link_hash_table * globals;
5704
5705 globals = elf32_arm_hash_table (info);
5706
5707 elf_section_data (sec)->local_dynrel = NULL;
5708
5709 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5710 sym_hashes = elf_sym_hashes (abfd);
5711 local_got_refcounts = elf_local_got_refcounts (abfd);
5712
5713 relend = relocs + sec->reloc_count;
5714 for (rel = relocs; rel < relend; rel++)
5715 {
5716 unsigned long r_symndx;
5717 struct elf_link_hash_entry *h = NULL;
5718 int r_type;
5719
5720 r_symndx = ELF32_R_SYM (rel->r_info);
5721 if (r_symndx >= symtab_hdr->sh_info)
5722 {
5723 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5724 while (h->root.type == bfd_link_hash_indirect
5725 || h->root.type == bfd_link_hash_warning)
5726 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5727 }
5728
5729 r_type = ELF32_R_TYPE (rel->r_info);
5730 r_type = arm_real_reloc_type (globals, r_type);
5731 switch (r_type)
5732 {
5733 case R_ARM_GOT32:
5734 case R_ARM_GOT_PREL:
5735 case R_ARM_TLS_GD32:
5736 case R_ARM_TLS_IE32:
5737 if (h != NULL)
5738 {
5739 if (h->got.refcount > 0)
5740 h->got.refcount -= 1;
5741 }
5742 else if (local_got_refcounts != NULL)
5743 {
5744 if (local_got_refcounts[r_symndx] > 0)
5745 local_got_refcounts[r_symndx] -= 1;
5746 }
5747 break;
5748
5749 case R_ARM_TLS_LDM32:
5750 elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1;
5751 break;
5752
5753 case R_ARM_ABS32:
5754 case R_ARM_REL32:
5755 case R_ARM_PC24:
5756 case R_ARM_PLT32:
5757 case R_ARM_CALL:
5758 case R_ARM_JUMP24:
5759 case R_ARM_PREL31:
5760 case R_ARM_THM_CALL:
5761 case R_ARM_MOVW_ABS_NC:
5762 case R_ARM_MOVT_ABS:
5763 case R_ARM_MOVW_PREL_NC:
5764 case R_ARM_MOVT_PREL:
5765 case R_ARM_THM_MOVW_ABS_NC:
5766 case R_ARM_THM_MOVT_ABS:
5767 case R_ARM_THM_MOVW_PREL_NC:
5768 case R_ARM_THM_MOVT_PREL:
5769 /* Should the interworking branches be here also? */
5770
5771 if (h != NULL)
5772 {
5773 struct elf32_arm_link_hash_entry *eh;
5774 struct elf32_arm_relocs_copied **pp;
5775 struct elf32_arm_relocs_copied *p;
5776
5777 eh = (struct elf32_arm_link_hash_entry *) h;
5778
5779 if (h->plt.refcount > 0)
5780 {
5781 h->plt.refcount -= 1;
5782 if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL)
5783 eh->plt_thumb_refcount--;
5784 }
5785
5786 if (r_type == R_ARM_ABS32
5787 || r_type == R_ARM_REL32)
5788 {
5789 for (pp = &eh->relocs_copied; (p = *pp) != NULL;
5790 pp = &p->next)
5791 if (p->section == sec)
5792 {
5793 p->count -= 1;
5794 if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
5795 p->pc_count -= 1;
5796 if (p->count == 0)
5797 *pp = p->next;
5798 break;
5799 }
5800 }
5801 }
5802 break;
5803
5804 default:
5805 break;
5806 }
5807 }
5808
5809 return TRUE;
5810 }
5811
5812 /* Look through the relocs for a section during the first phase. */
5813
5814 static bfd_boolean
5815 elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
5816 asection *sec, const Elf_Internal_Rela *relocs)
5817 {
5818 Elf_Internal_Shdr *symtab_hdr;
5819 struct elf_link_hash_entry **sym_hashes;
5820 struct elf_link_hash_entry **sym_hashes_end;
5821 const Elf_Internal_Rela *rel;
5822 const Elf_Internal_Rela *rel_end;
5823 bfd *dynobj;
5824 asection *sreloc;
5825 bfd_vma *local_got_offsets;
5826 struct elf32_arm_link_hash_table *htab;
5827
5828 if (info->relocatable)
5829 return TRUE;
5830
5831 htab = elf32_arm_hash_table (info);
5832 sreloc = NULL;
5833
5834 /* Create dynamic sections for relocatable executables so that we can
5835 copy relocations. */
5836 if (htab->root.is_relocatable_executable
5837 && ! htab->root.dynamic_sections_created)
5838 {
5839 if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
5840 return FALSE;
5841 }
5842
5843 dynobj = elf_hash_table (info)->dynobj;
5844 local_got_offsets = elf_local_got_offsets (abfd);
5845
5846 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5847 sym_hashes = elf_sym_hashes (abfd);
5848 sym_hashes_end = sym_hashes
5849 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
5850
5851 if (!elf_bad_symtab (abfd))
5852 sym_hashes_end -= symtab_hdr->sh_info;
5853
5854 rel_end = relocs + sec->reloc_count;
5855 for (rel = relocs; rel < rel_end; rel++)
5856 {
5857 struct elf_link_hash_entry *h;
5858 struct elf32_arm_link_hash_entry *eh;
5859 unsigned long r_symndx;
5860 int r_type;
5861
5862 r_symndx = ELF32_R_SYM (rel->r_info);
5863 r_type = ELF32_R_TYPE (rel->r_info);
5864 r_type = arm_real_reloc_type (htab, r_type);
5865
5866 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
5867 {
5868 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
5869 r_symndx);
5870 return FALSE;
5871 }
5872
5873 if (r_symndx < symtab_hdr->sh_info)
5874 h = NULL;
5875 else
5876 {
5877 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5878 while (h->root.type == bfd_link_hash_indirect
5879 || h->root.type == bfd_link_hash_warning)
5880 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5881 }
5882
5883 eh = (struct elf32_arm_link_hash_entry *) h;
5884
5885 switch (r_type)
5886 {
5887 case R_ARM_GOT32:
5888 case R_ARM_GOT_PREL:
5889 case R_ARM_TLS_GD32:
5890 case R_ARM_TLS_IE32:
5891 /* This symbol requires a global offset table entry. */
5892 {
5893 int tls_type, old_tls_type;
5894
5895 switch (r_type)
5896 {
5897 case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break;
5898 case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break;
5899 default: tls_type = GOT_NORMAL; break;
5900 }
5901
5902 if (h != NULL)
5903 {
5904 h->got.refcount++;
5905 old_tls_type = elf32_arm_hash_entry (h)->tls_type;
5906 }
5907 else
5908 {
5909 bfd_signed_vma *local_got_refcounts;
5910
5911 /* This is a global offset table entry for a local symbol. */
5912 local_got_refcounts = elf_local_got_refcounts (abfd);
5913 if (local_got_refcounts == NULL)
5914 {
5915 bfd_size_type size;
5916
5917 size = symtab_hdr->sh_info;
5918 size *= (sizeof (bfd_signed_vma) + sizeof(char));
5919 local_got_refcounts = bfd_zalloc (abfd, size);
5920 if (local_got_refcounts == NULL)
5921 return FALSE;
5922 elf_local_got_refcounts (abfd) = local_got_refcounts;
5923 elf32_arm_local_got_tls_type (abfd)
5924 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
5925 }
5926 local_got_refcounts[r_symndx] += 1;
5927 old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx];
5928 }
5929
5930 /* We will already have issued an error message if there is a
5931 TLS / non-TLS mismatch, based on the symbol type. We don't
5932 support any linker relaxations. So just combine any TLS
5933 types needed. */
5934 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
5935 && tls_type != GOT_NORMAL)
5936 tls_type |= old_tls_type;
5937
5938 if (old_tls_type != tls_type)
5939 {
5940 if (h != NULL)
5941 elf32_arm_hash_entry (h)->tls_type = tls_type;
5942 else
5943 elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type;
5944 }
5945 }
5946 /* Fall through */
5947
5948 case R_ARM_TLS_LDM32:
5949 if (r_type == R_ARM_TLS_LDM32)
5950 htab->tls_ldm_got.refcount++;
5951 /* Fall through */
5952
5953 case R_ARM_GOTOFF32:
5954 case R_ARM_GOTPC:
5955 if (htab->sgot == NULL)
5956 {
5957 if (htab->root.dynobj == NULL)
5958 htab->root.dynobj = abfd;
5959 if (!create_got_section (htab->root.dynobj, info))
5960 return FALSE;
5961 }
5962 break;
5963
5964 case R_ARM_ABS12:
5965 /* VxWorks uses dynamic R_ARM_ABS12 relocations for
5966 ldr __GOTT_INDEX__ offsets. */
5967 if (!htab->vxworks_p)
5968 break;
5969 /* Fall through */
5970
5971 case R_ARM_ABS32:
5972 case R_ARM_REL32:
5973 case R_ARM_PC24:
5974 case R_ARM_PLT32:
5975 case R_ARM_CALL:
5976 case R_ARM_JUMP24:
5977 case R_ARM_PREL31:
5978 case R_ARM_THM_CALL:
5979 case R_ARM_MOVW_ABS_NC:
5980 case R_ARM_MOVT_ABS:
5981 case R_ARM_MOVW_PREL_NC:
5982 case R_ARM_MOVT_PREL:
5983 case R_ARM_THM_MOVW_ABS_NC:
5984 case R_ARM_THM_MOVT_ABS:
5985 case R_ARM_THM_MOVW_PREL_NC:
5986 case R_ARM_THM_MOVT_PREL:
5987 /* Should the interworking branches be listed here? */
5988 if (h != NULL)
5989 {
5990 /* If this reloc is in a read-only section, we might
5991 need a copy reloc. We can't check reliably at this
5992 stage whether the section is read-only, as input
5993 sections have not yet been mapped to output sections.
5994 Tentatively set the flag for now, and correct in
5995 adjust_dynamic_symbol. */
5996 if (!info->shared)
5997 h->non_got_ref = 1;
5998
5999 /* We may need a .plt entry if the function this reloc
6000 refers to is in a different object. We can't tell for
6001 sure yet, because something later might force the
6002 symbol local. */
6003 if (r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
6004 h->needs_plt = 1;
6005
6006 /* If we create a PLT entry, this relocation will reference
6007 it, even if it's an ABS32 relocation. */
6008 h->plt.refcount += 1;
6009
6010 if (r_type == R_ARM_THM_CALL)
6011 eh->plt_thumb_refcount += 1;
6012 }
6013
6014 /* If we are creating a shared library or relocatable executable,
6015 and this is a reloc against a global symbol, or a non PC
6016 relative reloc against a local symbol, then we need to copy
6017 the reloc into the shared library. However, if we are linking
6018 with -Bsymbolic, we do not need to copy a reloc against a
6019 global symbol which is defined in an object we are
6020 including in the link (i.e., DEF_REGULAR is set). At
6021 this point we have not seen all the input files, so it is
6022 possible that DEF_REGULAR is not set now but will be set
6023 later (it is never cleared). We account for that
6024 possibility below by storing information in the
6025 relocs_copied field of the hash table entry. */
6026 if ((info->shared || htab->root.is_relocatable_executable)
6027 && (sec->flags & SEC_ALLOC) != 0
6028 && (r_type == R_ARM_ABS32
6029 || (h != NULL && ! h->needs_plt
6030 && (! info->symbolic || ! h->def_regular))))
6031 {
6032 struct elf32_arm_relocs_copied *p, **head;
6033
6034 /* When creating a shared object, we must copy these
6035 reloc types into the output file. We create a reloc
6036 section in dynobj and make room for this reloc. */
6037 if (sreloc == NULL)
6038 {
6039 const char * name;
6040
6041 name = (bfd_elf_string_from_elf_section
6042 (abfd,
6043 elf_elfheader (abfd)->e_shstrndx,
6044 elf_section_data (sec)->rel_hdr.sh_name));
6045 if (name == NULL)
6046 return FALSE;
6047
6048 BFD_ASSERT (reloc_section_p (htab, name, sec));
6049
6050 sreloc = bfd_get_section_by_name (dynobj, name);
6051 if (sreloc == NULL)
6052 {
6053 flagword flags;
6054
6055 flags = (SEC_HAS_CONTENTS | SEC_READONLY
6056 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
6057 if ((sec->flags & SEC_ALLOC) != 0
6058 /* BPABI objects never have dynamic
6059 relocations mapped. */
6060 && !htab->symbian_p)
6061 flags |= SEC_ALLOC | SEC_LOAD;
6062 sreloc = bfd_make_section_with_flags (dynobj,
6063 name,
6064 flags);
6065 if (sreloc == NULL
6066 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
6067 return FALSE;
6068 }
6069
6070 elf_section_data (sec)->sreloc = sreloc;
6071 }
6072
6073 /* If this is a global symbol, we count the number of
6074 relocations we need for this symbol. */
6075 if (h != NULL)
6076 {
6077 head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
6078 }
6079 else
6080 {
6081 /* Track dynamic relocs needed for local syms too.
6082 We really need local syms available to do this
6083 easily. Oh well. */
6084
6085 asection *s;
6086 void *vpp;
6087
6088 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
6089 sec, r_symndx);
6090 if (s == NULL)
6091 return FALSE;
6092
6093 vpp = &elf_section_data (s)->local_dynrel;
6094 head = (struct elf32_arm_relocs_copied **) vpp;
6095 }
6096
6097 p = *head;
6098 if (p == NULL || p->section != sec)
6099 {
6100 bfd_size_type amt = sizeof *p;
6101
6102 p = bfd_alloc (htab->root.dynobj, amt);
6103 if (p == NULL)
6104 return FALSE;
6105 p->next = *head;
6106 *head = p;
6107 p->section = sec;
6108 p->count = 0;
6109 p->pc_count = 0;
6110 }
6111
6112 if (r_type == R_ARM_REL32)
6113 p->pc_count += 1;
6114 p->count += 1;
6115 }
6116 break;
6117
6118 /* This relocation describes the C++ object vtable hierarchy.
6119 Reconstruct it for later use during GC. */
6120 case R_ARM_GNU_VTINHERIT:
6121 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
6122 return FALSE;
6123 break;
6124
6125 /* This relocation describes which C++ vtable entries are actually
6126 used. Record for later use during GC. */
6127 case R_ARM_GNU_VTENTRY:
6128 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
6129 return FALSE;
6130 break;
6131 }
6132 }
6133
6134 return TRUE;
6135 }
6136
6137 /* Treat mapping symbols as special target symbols. */
6138
6139 static bfd_boolean
6140 elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym)
6141 {
6142 return bfd_is_arm_special_symbol_name (sym->name,
6143 BFD_ARM_SPECIAL_SYM_TYPE_ANY);
6144 }
6145
6146 /* This is a copy of elf_find_function() from elf.c except that
6147 ARM mapping symbols are ignored when looking for function names
6148 and STT_ARM_TFUNC is considered to a function type. */
6149
6150 static bfd_boolean
6151 arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED,
6152 asection * section,
6153 asymbol ** symbols,
6154 bfd_vma offset,
6155 const char ** filename_ptr,
6156 const char ** functionname_ptr)
6157 {
6158 const char * filename = NULL;
6159 asymbol * func = NULL;
6160 bfd_vma low_func = 0;
6161 asymbol ** p;
6162
6163 for (p = symbols; *p != NULL; p++)
6164 {
6165 elf_symbol_type *q;
6166
6167 q = (elf_symbol_type *) *p;
6168
6169 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6170 {
6171 default:
6172 break;
6173 case STT_FILE:
6174 filename = bfd_asymbol_name (&q->symbol);
6175 break;
6176 case STT_FUNC:
6177 case STT_ARM_TFUNC:
6178 case STT_NOTYPE:
6179 /* Skip mapping symbols. */
6180 if ((q->symbol.flags & BSF_LOCAL)
6181 && bfd_is_arm_special_symbol_name (q->symbol.name,
6182 BFD_ARM_SPECIAL_SYM_TYPE_ANY))
6183 continue;
6184 /* Fall through. */
6185 if (bfd_get_section (&q->symbol) == section
6186 && q->symbol.value >= low_func
6187 && q->symbol.value <= offset)
6188 {
6189 func = (asymbol *) q;
6190 low_func = q->symbol.value;
6191 }
6192 break;
6193 }
6194 }
6195
6196 if (func == NULL)
6197 return FALSE;
6198
6199 if (filename_ptr)
6200 *filename_ptr = filename;
6201 if (functionname_ptr)
6202 *functionname_ptr = bfd_asymbol_name (func);
6203
6204 return TRUE;
6205 }
6206
6207
6208 /* Find the nearest line to a particular section and offset, for error
6209 reporting. This code is a duplicate of the code in elf.c, except
6210 that it uses arm_elf_find_function. */
6211
6212 static bfd_boolean
6213 elf32_arm_find_nearest_line (bfd * abfd,
6214 asection * section,
6215 asymbol ** symbols,
6216 bfd_vma offset,
6217 const char ** filename_ptr,
6218 const char ** functionname_ptr,
6219 unsigned int * line_ptr)
6220 {
6221 bfd_boolean found = FALSE;
6222
6223 /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */
6224
6225 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6226 filename_ptr, functionname_ptr,
6227 line_ptr, 0,
6228 & elf_tdata (abfd)->dwarf2_find_line_info))
6229 {
6230 if (!*functionname_ptr)
6231 arm_elf_find_function (abfd, section, symbols, offset,
6232 *filename_ptr ? NULL : filename_ptr,
6233 functionname_ptr);
6234
6235 return TRUE;
6236 }
6237
6238 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6239 & found, filename_ptr,
6240 functionname_ptr, line_ptr,
6241 & elf_tdata (abfd)->line_info))
6242 return FALSE;
6243
6244 if (found && (*functionname_ptr || *line_ptr))
6245 return TRUE;
6246
6247 if (symbols == NULL)
6248 return FALSE;
6249
6250 if (! arm_elf_find_function (abfd, section, symbols, offset,
6251 filename_ptr, functionname_ptr))
6252 return FALSE;
6253
6254 *line_ptr = 0;
6255 return TRUE;
6256 }
6257
6258 static bfd_boolean
6259 elf32_arm_find_inliner_info (bfd * abfd,
6260 const char ** filename_ptr,
6261 const char ** functionname_ptr,
6262 unsigned int * line_ptr)
6263 {
6264 bfd_boolean found;
6265 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
6266 functionname_ptr, line_ptr,
6267 & elf_tdata (abfd)->dwarf2_find_line_info);
6268 return found;
6269 }
6270
6271 /* Adjust a symbol defined by a dynamic object and referenced by a
6272 regular object. The current definition is in some section of the
6273 dynamic object, but we're not including those sections. We have to
6274 change the definition to something the rest of the link can
6275 understand. */
6276
6277 static bfd_boolean
6278 elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info,
6279 struct elf_link_hash_entry * h)
6280 {
6281 bfd * dynobj;
6282 asection * s;
6283 unsigned int power_of_two;
6284 struct elf32_arm_link_hash_entry * eh;
6285 struct elf32_arm_link_hash_table *globals;
6286
6287 globals = elf32_arm_hash_table (info);
6288 dynobj = elf_hash_table (info)->dynobj;
6289
6290 /* Make sure we know what is going on here. */
6291 BFD_ASSERT (dynobj != NULL
6292 && (h->needs_plt
6293 || h->u.weakdef != NULL
6294 || (h->def_dynamic
6295 && h->ref_regular
6296 && !h->def_regular)));
6297
6298 eh = (struct elf32_arm_link_hash_entry *) h;
6299
6300 /* If this is a function, put it in the procedure linkage table. We
6301 will fill in the contents of the procedure linkage table later,
6302 when we know the address of the .got section. */
6303 if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC
6304 || h->needs_plt)
6305 {
6306 if (h->plt.refcount <= 0
6307 || SYMBOL_CALLS_LOCAL (info, h)
6308 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6309 && h->root.type == bfd_link_hash_undefweak))
6310 {
6311 /* This case can occur if we saw a PLT32 reloc in an input
6312 file, but the symbol was never referred to by a dynamic
6313 object, or if all references were garbage collected. In
6314 such a case, we don't actually need to build a procedure
6315 linkage table, and we can just do a PC24 reloc instead. */
6316 h->plt.offset = (bfd_vma) -1;
6317 eh->plt_thumb_refcount = 0;
6318 h->needs_plt = 0;
6319 }
6320
6321 return TRUE;
6322 }
6323 else
6324 {
6325 /* It's possible that we incorrectly decided a .plt reloc was
6326 needed for an R_ARM_PC24 or similar reloc to a non-function sym
6327 in check_relocs. We can't decide accurately between function
6328 and non-function syms in check-relocs; Objects loaded later in
6329 the link may change h->type. So fix it now. */
6330 h->plt.offset = (bfd_vma) -1;
6331 eh->plt_thumb_refcount = 0;
6332 }
6333
6334 /* If this is a weak symbol, and there is a real definition, the
6335 processor independent code will have arranged for us to see the
6336 real definition first, and we can just use the same value. */
6337 if (h->u.weakdef != NULL)
6338 {
6339 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6340 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6341 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6342 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6343 return TRUE;
6344 }
6345
6346 /* If there are no non-GOT references, we do not need a copy
6347 relocation. */
6348 if (!h->non_got_ref)
6349 return TRUE;
6350
6351 /* This is a reference to a symbol defined by a dynamic object which
6352 is not a function. */
6353
6354 /* If we are creating a shared library, we must presume that the
6355 only references to the symbol are via the global offset table.
6356 For such cases we need not do anything here; the relocations will
6357 be handled correctly by relocate_section. Relocatable executables
6358 can reference data in shared objects directly, so we don't need to
6359 do anything here. */
6360 if (info->shared || globals->root.is_relocatable_executable)
6361 return TRUE;
6362
6363 if (h->size == 0)
6364 {
6365 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6366 h->root.root.string);
6367 return TRUE;
6368 }
6369
6370 /* We must allocate the symbol in our .dynbss section, which will
6371 become part of the .bss section of the executable. There will be
6372 an entry for this symbol in the .dynsym section. The dynamic
6373 object will contain position independent code, so all references
6374 from the dynamic object to this symbol will go through the global
6375 offset table. The dynamic linker will use the .dynsym entry to
6376 determine the address it must put in the global offset table, so
6377 both the dynamic object and the regular object will refer to the
6378 same memory location for the variable. */
6379 s = bfd_get_section_by_name (dynobj, ".dynbss");
6380 BFD_ASSERT (s != NULL);
6381
6382 /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to
6383 copy the initial value out of the dynamic object and into the
6384 runtime process image. We need to remember the offset into the
6385 .rel(a).bss section we are going to use. */
6386 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6387 {
6388 asection *srel;
6389
6390 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss"));
6391 BFD_ASSERT (srel != NULL);
6392 srel->size += RELOC_SIZE (globals);
6393 h->needs_copy = 1;
6394 }
6395
6396 /* We need to figure out the alignment required for this symbol. I
6397 have no idea how ELF linkers handle this. */
6398 power_of_two = bfd_log2 (h->size);
6399 if (power_of_two > 3)
6400 power_of_two = 3;
6401
6402 /* Apply the required alignment. */
6403 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
6404 if (power_of_two > bfd_get_section_alignment (dynobj, s))
6405 {
6406 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
6407 return FALSE;
6408 }
6409
6410 /* Define the symbol as being at this point in the section. */
6411 h->root.u.def.section = s;
6412 h->root.u.def.value = s->size;
6413
6414 /* Increment the section size to make room for the symbol. */
6415 s->size += h->size;
6416
6417 return TRUE;
6418 }
6419
6420 /* Allocate space in .plt, .got and associated reloc sections for
6421 dynamic relocs. */
6422
6423 static bfd_boolean
6424 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
6425 {
6426 struct bfd_link_info *info;
6427 struct elf32_arm_link_hash_table *htab;
6428 struct elf32_arm_link_hash_entry *eh;
6429 struct elf32_arm_relocs_copied *p;
6430
6431 eh = (struct elf32_arm_link_hash_entry *) h;
6432
6433 if (h->root.type == bfd_link_hash_indirect)
6434 return TRUE;
6435
6436 if (h->root.type == bfd_link_hash_warning)
6437 /* When warning symbols are created, they **replace** the "real"
6438 entry in the hash table, thus we never get to see the real
6439 symbol in a hash traversal. So look at it now. */
6440 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6441
6442 info = (struct bfd_link_info *) inf;
6443 htab = elf32_arm_hash_table (info);
6444
6445 if (htab->root.dynamic_sections_created
6446 && h->plt.refcount > 0)
6447 {
6448 /* Make sure this symbol is output as a dynamic symbol.
6449 Undefined weak syms won't yet be marked as dynamic. */
6450 if (h->dynindx == -1
6451 && !h->forced_local)
6452 {
6453 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6454 return FALSE;
6455 }
6456
6457 if (info->shared
6458 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
6459 {
6460 asection *s = htab->splt;
6461
6462 /* If this is the first .plt entry, make room for the special
6463 first entry. */
6464 if (s->size == 0)
6465 s->size += htab->plt_header_size;
6466
6467 h->plt.offset = s->size;
6468
6469 /* If we will insert a Thumb trampoline before this PLT, leave room
6470 for it. */
6471 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
6472 {
6473 h->plt.offset += PLT_THUMB_STUB_SIZE;
6474 s->size += PLT_THUMB_STUB_SIZE;
6475 }
6476
6477 /* If this symbol is not defined in a regular file, and we are
6478 not generating a shared library, then set the symbol to this
6479 location in the .plt. This is required to make function
6480 pointers compare as equal between the normal executable and
6481 the shared library. */
6482 if (! info->shared
6483 && !h->def_regular)
6484 {
6485 h->root.u.def.section = s;
6486 h->root.u.def.value = h->plt.offset;
6487
6488 /* Make sure the function is not marked as Thumb, in case
6489 it is the target of an ABS32 relocation, which will
6490 point to the PLT entry. */
6491 if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC)
6492 h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC);
6493 }
6494
6495 /* Make room for this entry. */
6496 s->size += htab->plt_entry_size;
6497
6498 if (!htab->symbian_p)
6499 {
6500 /* We also need to make an entry in the .got.plt section, which
6501 will be placed in the .got section by the linker script. */
6502 eh->plt_got_offset = htab->sgotplt->size;
6503 htab->sgotplt->size += 4;
6504 }
6505
6506 /* We also need to make an entry in the .rel(a).plt section. */
6507 htab->srelplt->size += RELOC_SIZE (htab);
6508
6509 /* VxWorks executables have a second set of relocations for
6510 each PLT entry. They go in a separate relocation section,
6511 which is processed by the kernel loader. */
6512 if (htab->vxworks_p && !info->shared)
6513 {
6514 /* There is a relocation for the initial PLT entry:
6515 an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */
6516 if (h->plt.offset == htab->plt_header_size)
6517 htab->srelplt2->size += RELOC_SIZE (htab);
6518
6519 /* There are two extra relocations for each subsequent
6520 PLT entry: an R_ARM_32 relocation for the GOT entry,
6521 and an R_ARM_32 relocation for the PLT entry. */
6522 htab->srelplt2->size += RELOC_SIZE (htab) * 2;
6523 }
6524 }
6525 else
6526 {
6527 h->plt.offset = (bfd_vma) -1;
6528 h->needs_plt = 0;
6529 }
6530 }
6531 else
6532 {
6533 h->plt.offset = (bfd_vma) -1;
6534 h->needs_plt = 0;
6535 }
6536
6537 if (h->got.refcount > 0)
6538 {
6539 asection *s;
6540 bfd_boolean dyn;
6541 int tls_type = elf32_arm_hash_entry (h)->tls_type;
6542 int indx;
6543
6544 /* Make sure this symbol is output as a dynamic symbol.
6545 Undefined weak syms won't yet be marked as dynamic. */
6546 if (h->dynindx == -1
6547 && !h->forced_local)
6548 {
6549 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6550 return FALSE;
6551 }
6552
6553 if (!htab->symbian_p)
6554 {
6555 s = htab->sgot;
6556 h->got.offset = s->size;
6557
6558 if (tls_type == GOT_UNKNOWN)
6559 abort ();
6560
6561 if (tls_type == GOT_NORMAL)
6562 /* Non-TLS symbols need one GOT slot. */
6563 s->size += 4;
6564 else
6565 {
6566 if (tls_type & GOT_TLS_GD)
6567 /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */
6568 s->size += 8;
6569 if (tls_type & GOT_TLS_IE)
6570 /* R_ARM_TLS_IE32 needs one GOT slot. */
6571 s->size += 4;
6572 }
6573
6574 dyn = htab->root.dynamic_sections_created;
6575
6576 indx = 0;
6577 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6578 && (!info->shared
6579 || !SYMBOL_REFERENCES_LOCAL (info, h)))
6580 indx = h->dynindx;
6581
6582 if (tls_type != GOT_NORMAL
6583 && (info->shared || indx != 0)
6584 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6585 || h->root.type != bfd_link_hash_undefweak))
6586 {
6587 if (tls_type & GOT_TLS_IE)
6588 htab->srelgot->size += RELOC_SIZE (htab);
6589
6590 if (tls_type & GOT_TLS_GD)
6591 htab->srelgot->size += RELOC_SIZE (htab);
6592
6593 if ((tls_type & GOT_TLS_GD) && indx != 0)
6594 htab->srelgot->size += RELOC_SIZE (htab);
6595 }
6596 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6597 || h->root.type != bfd_link_hash_undefweak)
6598 && (info->shared
6599 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6600 htab->srelgot->size += RELOC_SIZE (htab);
6601 }
6602 }
6603 else
6604 h->got.offset = (bfd_vma) -1;
6605
6606 if (eh->relocs_copied == NULL)
6607 return TRUE;
6608
6609 /* In the shared -Bsymbolic case, discard space allocated for
6610 dynamic pc-relative relocs against symbols which turn out to be
6611 defined in regular objects. For the normal shared case, discard
6612 space for pc-relative relocs that have become local due to symbol
6613 visibility changes. */
6614
6615 if (info->shared || htab->root.is_relocatable_executable)
6616 {
6617 /* The only reloc that uses pc_count is R_ARM_REL32, which will
6618 appear on something like ".long foo - .". We want calls to
6619 protected symbols to resolve directly to the function rather
6620 than going via the plt. If people want function pointer
6621 comparisons to work as expected then they should avoid
6622 writing assembly like ".long foo - .". */
6623 if (SYMBOL_CALLS_LOCAL (info, h))
6624 {
6625 struct elf32_arm_relocs_copied **pp;
6626
6627 for (pp = &eh->relocs_copied; (p = *pp) != NULL; )
6628 {
6629 p->count -= p->pc_count;
6630 p->pc_count = 0;
6631 if (p->count == 0)
6632 *pp = p->next;
6633 else
6634 pp = &p->next;
6635 }
6636 }
6637
6638 /* Also discard relocs on undefined weak syms with non-default
6639 visibility. */
6640 if (eh->relocs_copied != NULL
6641 && h->root.type == bfd_link_hash_undefweak)
6642 {
6643 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6644 eh->relocs_copied = NULL;
6645
6646 /* Make sure undefined weak symbols are output as a dynamic
6647 symbol in PIEs. */
6648 else if (h->dynindx == -1
6649 && !h->forced_local)
6650 {
6651 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6652 return FALSE;
6653 }
6654 }
6655
6656 else if (htab->root.is_relocatable_executable && h->dynindx == -1
6657 && h->root.type == bfd_link_hash_new)
6658 {
6659 /* Output absolute symbols so that we can create relocations
6660 against them. For normal symbols we output a relocation
6661 against the section that contains them. */
6662 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6663 return FALSE;
6664 }
6665
6666 }
6667 else
6668 {
6669 /* For the non-shared case, discard space for relocs against
6670 symbols which turn out to need copy relocs or are not
6671 dynamic. */
6672
6673 if (!h->non_got_ref
6674 && ((h->def_dynamic
6675 && !h->def_regular)
6676 || (htab->root.dynamic_sections_created
6677 && (h->root.type == bfd_link_hash_undefweak
6678 || h->root.type == bfd_link_hash_undefined))))
6679 {
6680 /* Make sure this symbol is output as a dynamic symbol.
6681 Undefined weak syms won't yet be marked as dynamic. */
6682 if (h->dynindx == -1
6683 && !h->forced_local)
6684 {
6685 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6686 return FALSE;
6687 }
6688
6689 /* If that succeeded, we know we'll be keeping all the
6690 relocs. */
6691 if (h->dynindx != -1)
6692 goto keep;
6693 }
6694
6695 eh->relocs_copied = NULL;
6696
6697 keep: ;
6698 }
6699
6700 /* Finally, allocate space. */
6701 for (p = eh->relocs_copied; p != NULL; p = p->next)
6702 {
6703 asection *sreloc = elf_section_data (p->section)->sreloc;
6704 sreloc->size += p->count * RELOC_SIZE (htab);
6705 }
6706
6707 return TRUE;
6708 }
6709
6710 /* Find any dynamic relocs that apply to read-only sections. */
6711
6712 static bfd_boolean
6713 elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
6714 {
6715 struct elf32_arm_link_hash_entry *eh;
6716 struct elf32_arm_relocs_copied *p;
6717
6718 if (h->root.type == bfd_link_hash_warning)
6719 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6720
6721 eh = (struct elf32_arm_link_hash_entry *) h;
6722 for (p = eh->relocs_copied; p != NULL; p = p->next)
6723 {
6724 asection *s = p->section;
6725
6726 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6727 {
6728 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6729
6730 info->flags |= DF_TEXTREL;
6731
6732 /* Not an error, just cut short the traversal. */
6733 return FALSE;
6734 }
6735 }
6736 return TRUE;
6737 }
6738
6739 /* Set the sizes of the dynamic sections. */
6740
6741 static bfd_boolean
6742 elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
6743 struct bfd_link_info * info)
6744 {
6745 bfd * dynobj;
6746 asection * s;
6747 bfd_boolean plt;
6748 bfd_boolean relocs;
6749 bfd *ibfd;
6750 struct elf32_arm_link_hash_table *htab;
6751
6752 htab = elf32_arm_hash_table (info);
6753 dynobj = elf_hash_table (info)->dynobj;
6754 BFD_ASSERT (dynobj != NULL);
6755 check_use_blx (htab);
6756
6757 if (elf_hash_table (info)->dynamic_sections_created)
6758 {
6759 /* Set the contents of the .interp section to the interpreter. */
6760 if (info->executable)
6761 {
6762 s = bfd_get_section_by_name (dynobj, ".interp");
6763 BFD_ASSERT (s != NULL);
6764 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6765 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6766 }
6767 }
6768
6769 /* Set up .got offsets for local syms, and space for local dynamic
6770 relocs. */
6771 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6772 {
6773 bfd_signed_vma *local_got;
6774 bfd_signed_vma *end_local_got;
6775 char *local_tls_type;
6776 bfd_size_type locsymcount;
6777 Elf_Internal_Shdr *symtab_hdr;
6778 asection *srel;
6779
6780 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
6781 continue;
6782
6783 for (s = ibfd->sections; s != NULL; s = s->next)
6784 {
6785 struct elf32_arm_relocs_copied *p;
6786
6787 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
6788 {
6789 if (!bfd_is_abs_section (p->section)
6790 && bfd_is_abs_section (p->section->output_section))
6791 {
6792 /* Input section has been discarded, either because
6793 it is a copy of a linkonce section or due to
6794 linker script /DISCARD/, so we'll be discarding
6795 the relocs too. */
6796 }
6797 else if (p->count != 0)
6798 {
6799 srel = elf_section_data (p->section)->sreloc;
6800 srel->size += p->count * RELOC_SIZE (htab);
6801 if ((p->section->output_section->flags & SEC_READONLY) != 0)
6802 info->flags |= DF_TEXTREL;
6803 }
6804 }
6805 }
6806
6807 local_got = elf_local_got_refcounts (ibfd);
6808 if (!local_got)
6809 continue;
6810
6811 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6812 locsymcount = symtab_hdr->sh_info;
6813 end_local_got = local_got + locsymcount;
6814 local_tls_type = elf32_arm_local_got_tls_type (ibfd);
6815 s = htab->sgot;
6816 srel = htab->srelgot;
6817 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
6818 {
6819 if (*local_got > 0)
6820 {
6821 *local_got = s->size;
6822 if (*local_tls_type & GOT_TLS_GD)
6823 /* TLS_GD relocs need an 8-byte structure in the GOT. */
6824 s->size += 8;
6825 if (*local_tls_type & GOT_TLS_IE)
6826 s->size += 4;
6827 if (*local_tls_type == GOT_NORMAL)
6828 s->size += 4;
6829
6830 if (info->shared || *local_tls_type == GOT_TLS_GD)
6831 srel->size += RELOC_SIZE (htab);
6832 }
6833 else
6834 *local_got = (bfd_vma) -1;
6835 }
6836 }
6837
6838 if (htab->tls_ldm_got.refcount > 0)
6839 {
6840 /* Allocate two GOT entries and one dynamic relocation (if necessary)
6841 for R_ARM_TLS_LDM32 relocations. */
6842 htab->tls_ldm_got.offset = htab->sgot->size;
6843 htab->sgot->size += 8;
6844 if (info->shared)
6845 htab->srelgot->size += RELOC_SIZE (htab);
6846 }
6847 else
6848 htab->tls_ldm_got.offset = -1;
6849
6850 /* Allocate global sym .plt and .got entries, and space for global
6851 sym dynamic relocs. */
6852 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
6853
6854 /* The check_relocs and adjust_dynamic_symbol entry points have
6855 determined the sizes of the various dynamic sections. Allocate
6856 memory for them. */
6857 plt = FALSE;
6858 relocs = FALSE;
6859 for (s = dynobj->sections; s != NULL; s = s->next)
6860 {
6861 const char * name;
6862
6863 if ((s->flags & SEC_LINKER_CREATED) == 0)
6864 continue;
6865
6866 /* It's OK to base decisions on the section name, because none
6867 of the dynobj section names depend upon the input files. */
6868 name = bfd_get_section_name (dynobj, s);
6869
6870 if (strcmp (name, ".plt") == 0)
6871 {
6872 /* Remember whether there is a PLT. */
6873 plt = s->size != 0;
6874 }
6875 else if (strncmp (name, ".rel", 4) == 0)
6876 {
6877 if (s->size != 0)
6878 {
6879 /* Remember whether there are any reloc sections other
6880 than .rel(a).plt and .rela.plt.unloaded. */
6881 if (s != htab->srelplt && s != htab->srelplt2)
6882 relocs = TRUE;
6883
6884 /* We use the reloc_count field as a counter if we need
6885 to copy relocs into the output file. */
6886 s->reloc_count = 0;
6887 }
6888 }
6889 else if (strncmp (name, ".got", 4) != 0
6890 && strcmp (name, ".dynbss") != 0)
6891 {
6892 /* It's not one of our sections, so don't allocate space. */
6893 continue;
6894 }
6895
6896 if (s->size == 0)
6897 {
6898 /* If we don't need this section, strip it from the
6899 output file. This is mostly to handle .rel(a).bss and
6900 .rel(a).plt. We must create both sections in
6901 create_dynamic_sections, because they must be created
6902 before the linker maps input sections to output
6903 sections. The linker does that before
6904 adjust_dynamic_symbol is called, and it is that
6905 function which decides whether anything needs to go
6906 into these sections. */
6907 s->flags |= SEC_EXCLUDE;
6908 continue;
6909 }
6910
6911 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6912 continue;
6913
6914 /* Allocate memory for the section contents. */
6915 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
6916 if (s->contents == NULL)
6917 return FALSE;
6918 }
6919
6920 if (elf_hash_table (info)->dynamic_sections_created)
6921 {
6922 /* Add some entries to the .dynamic section. We fill in the
6923 values later, in elf32_arm_finish_dynamic_sections, but we
6924 must add the entries now so that we get the correct size for
6925 the .dynamic section. The DT_DEBUG entry is filled in by the
6926 dynamic linker and used by the debugger. */
6927 #define add_dynamic_entry(TAG, VAL) \
6928 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6929
6930 if (info->executable)
6931 {
6932 if (!add_dynamic_entry (DT_DEBUG, 0))
6933 return FALSE;
6934 }
6935
6936 if (plt)
6937 {
6938 if ( !add_dynamic_entry (DT_PLTGOT, 0)
6939 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6940 || !add_dynamic_entry (DT_PLTREL,
6941 htab->use_rel ? DT_REL : DT_RELA)
6942 || !add_dynamic_entry (DT_JMPREL, 0))
6943 return FALSE;
6944 }
6945
6946 if (relocs)
6947 {
6948 if (htab->use_rel)
6949 {
6950 if (!add_dynamic_entry (DT_REL, 0)
6951 || !add_dynamic_entry (DT_RELSZ, 0)
6952 || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab)))
6953 return FALSE;
6954 }
6955 else
6956 {
6957 if (!add_dynamic_entry (DT_RELA, 0)
6958 || !add_dynamic_entry (DT_RELASZ, 0)
6959 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
6960 return FALSE;
6961 }
6962 }
6963
6964 /* If any dynamic relocs apply to a read-only section,
6965 then we need a DT_TEXTREL entry. */
6966 if ((info->flags & DF_TEXTREL) == 0)
6967 elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs,
6968 (PTR) info);
6969
6970 if ((info->flags & DF_TEXTREL) != 0)
6971 {
6972 if (!add_dynamic_entry (DT_TEXTREL, 0))
6973 return FALSE;
6974 }
6975 }
6976 #undef add_dynamic_entry
6977
6978 return TRUE;
6979 }
6980
6981 /* Finish up dynamic symbol handling. We set the contents of various
6982 dynamic sections here. */
6983
6984 static bfd_boolean
6985 elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info,
6986 struct elf_link_hash_entry * h, Elf_Internal_Sym * sym)
6987 {
6988 bfd * dynobj;
6989 struct elf32_arm_link_hash_table *htab;
6990 struct elf32_arm_link_hash_entry *eh;
6991
6992 dynobj = elf_hash_table (info)->dynobj;
6993 htab = elf32_arm_hash_table (info);
6994 eh = (struct elf32_arm_link_hash_entry *) h;
6995
6996 if (h->plt.offset != (bfd_vma) -1)
6997 {
6998 asection * splt;
6999 asection * srel;
7000 bfd_byte *loc;
7001 bfd_vma plt_index;
7002 Elf_Internal_Rela rel;
7003
7004 /* This symbol has an entry in the procedure linkage table. Set
7005 it up. */
7006
7007 BFD_ASSERT (h->dynindx != -1);
7008
7009 splt = bfd_get_section_by_name (dynobj, ".plt");
7010 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt"));
7011 BFD_ASSERT (splt != NULL && srel != NULL);
7012
7013 /* Fill in the entry in the procedure linkage table. */
7014 if (htab->symbian_p)
7015 {
7016 put_arm_insn (htab, output_bfd,
7017 elf32_arm_symbian_plt_entry[0],
7018 splt->contents + h->plt.offset);
7019 bfd_put_32 (output_bfd,
7020 elf32_arm_symbian_plt_entry[1],
7021 splt->contents + h->plt.offset + 4);
7022
7023 /* Fill in the entry in the .rel.plt section. */
7024 rel.r_offset = (splt->output_section->vma
7025 + splt->output_offset
7026 + h->plt.offset + 4);
7027 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
7028
7029 /* Get the index in the procedure linkage table which
7030 corresponds to this symbol. This is the index of this symbol
7031 in all the symbols for which we are making plt entries. The
7032 first entry in the procedure linkage table is reserved. */
7033 plt_index = ((h->plt.offset - htab->plt_header_size)
7034 / htab->plt_entry_size);
7035 }
7036 else
7037 {
7038 bfd_vma got_offset, got_address, plt_address;
7039 bfd_vma got_displacement;
7040 asection * sgot;
7041 bfd_byte * ptr;
7042
7043 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
7044 BFD_ASSERT (sgot != NULL);
7045
7046 /* Get the offset into the .got.plt table of the entry that
7047 corresponds to this function. */
7048 got_offset = eh->plt_got_offset;
7049
7050 /* Get the index in the procedure linkage table which
7051 corresponds to this symbol. This is the index of this symbol
7052 in all the symbols for which we are making plt entries. The
7053 first three entries in .got.plt are reserved; after that
7054 symbols appear in the same order as in .plt. */
7055 plt_index = (got_offset - 12) / 4;
7056
7057 /* Calculate the address of the GOT entry. */
7058 got_address = (sgot->output_section->vma
7059 + sgot->output_offset
7060 + got_offset);
7061
7062 /* ...and the address of the PLT entry. */
7063 plt_address = (splt->output_section->vma
7064 + splt->output_offset
7065 + h->plt.offset);
7066
7067 ptr = htab->splt->contents + h->plt.offset;
7068 if (htab->vxworks_p && info->shared)
7069 {
7070 unsigned int i;
7071 bfd_vma val;
7072
7073 for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4)
7074 {
7075 val = elf32_arm_vxworks_shared_plt_entry[i];
7076 if (i == 2)
7077 val |= got_address - sgot->output_section->vma;
7078 if (i == 5)
7079 val |= plt_index * RELOC_SIZE (htab);
7080 if (i == 2 || i == 5)
7081 bfd_put_32 (output_bfd, val, ptr);
7082 else
7083 put_arm_insn (htab, output_bfd, val, ptr);
7084 }
7085 }
7086 else if (htab->vxworks_p)
7087 {
7088 unsigned int i;
7089 bfd_vma val;
7090
7091 for (i = 0; i != htab->plt_entry_size / 4; i++)
7092 {
7093 val = elf32_arm_vxworks_exec_plt_entry[i];
7094 if (i == 2)
7095 val |= got_address;
7096 if (i == 4)
7097 val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2);
7098 if (i == 5)
7099 val |= plt_index * RELOC_SIZE (htab);
7100 if (i == 2 || i == 5)
7101 bfd_put_32 (output_bfd, val, ptr);
7102 else
7103 put_arm_insn (htab, output_bfd, val, ptr);
7104 }
7105
7106 loc = (htab->srelplt2->contents
7107 + (plt_index * 2 + 1) * RELOC_SIZE (htab));
7108
7109 /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation
7110 referencing the GOT for this PLT entry. */
7111 rel.r_offset = plt_address + 8;
7112 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
7113 rel.r_addend = got_offset;
7114 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7115 loc += RELOC_SIZE (htab);
7116
7117 /* Create the R_ARM_ABS32 relocation referencing the
7118 beginning of the PLT for this GOT entry. */
7119 rel.r_offset = got_address;
7120 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
7121 rel.r_addend = 0;
7122 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7123 }
7124 else
7125 {
7126 /* Calculate the displacement between the PLT slot and the
7127 entry in the GOT. The eight-byte offset accounts for the
7128 value produced by adding to pc in the first instruction
7129 of the PLT stub. */
7130 got_displacement = got_address - (plt_address + 8);
7131
7132 BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
7133
7134 if (!htab->use_blx && eh->plt_thumb_refcount > 0)
7135 {
7136 put_thumb_insn (htab, output_bfd,
7137 elf32_arm_plt_thumb_stub[0], ptr - 4);
7138 put_thumb_insn (htab, output_bfd,
7139 elf32_arm_plt_thumb_stub[1], ptr - 2);
7140 }
7141
7142 put_arm_insn (htab, output_bfd,
7143 elf32_arm_plt_entry[0]
7144 | ((got_displacement & 0x0ff00000) >> 20),
7145 ptr + 0);
7146 put_arm_insn (htab, output_bfd,
7147 elf32_arm_plt_entry[1]
7148 | ((got_displacement & 0x000ff000) >> 12),
7149 ptr+ 4);
7150 put_arm_insn (htab, output_bfd,
7151 elf32_arm_plt_entry[2]
7152 | (got_displacement & 0x00000fff),
7153 ptr + 8);
7154 #ifdef FOUR_WORD_PLT
7155 bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12);
7156 #endif
7157 }
7158
7159 /* Fill in the entry in the global offset table. */
7160 bfd_put_32 (output_bfd,
7161 (splt->output_section->vma
7162 + splt->output_offset),
7163 sgot->contents + got_offset);
7164
7165 /* Fill in the entry in the .rel(a).plt section. */
7166 rel.r_addend = 0;
7167 rel.r_offset = got_address;
7168 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
7169 }
7170
7171 loc = srel->contents + plt_index * RELOC_SIZE (htab);
7172 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7173
7174 if (!h->def_regular)
7175 {
7176 /* Mark the symbol as undefined, rather than as defined in
7177 the .plt section. Leave the value alone. */
7178 sym->st_shndx = SHN_UNDEF;
7179 /* If the symbol is weak, we do need to clear the value.
7180 Otherwise, the PLT entry would provide a definition for
7181 the symbol even if the symbol wasn't defined anywhere,
7182 and so the symbol would never be NULL. */
7183 if (!h->ref_regular_nonweak)
7184 sym->st_value = 0;
7185 }
7186 }
7187
7188 if (h->got.offset != (bfd_vma) -1
7189 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
7190 && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
7191 {
7192 asection * sgot;
7193 asection * srel;
7194 Elf_Internal_Rela rel;
7195 bfd_byte *loc;
7196 bfd_vma offset;
7197
7198 /* This symbol has an entry in the global offset table. Set it
7199 up. */
7200 sgot = bfd_get_section_by_name (dynobj, ".got");
7201 srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got"));
7202 BFD_ASSERT (sgot != NULL && srel != NULL);
7203
7204 offset = (h->got.offset & ~(bfd_vma) 1);
7205 rel.r_addend = 0;
7206 rel.r_offset = (sgot->output_section->vma
7207 + sgot->output_offset
7208 + offset);
7209
7210 /* If this is a static link, or it is a -Bsymbolic link and the
7211 symbol is defined locally or was forced to be local because
7212 of a version file, we just want to emit a RELATIVE reloc.
7213 The entry in the global offset table will already have been
7214 initialized in the relocate_section function. */
7215 if (info->shared
7216 && SYMBOL_REFERENCES_LOCAL (info, h))
7217 {
7218 BFD_ASSERT((h->got.offset & 1) != 0);
7219 rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
7220 if (!htab->use_rel)
7221 {
7222 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset);
7223 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
7224 }
7225 }
7226 else
7227 {
7228 BFD_ASSERT((h->got.offset & 1) == 0);
7229 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
7230 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
7231 }
7232
7233 loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab);
7234 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7235 }
7236
7237 if (h->needs_copy)
7238 {
7239 asection * s;
7240 Elf_Internal_Rela rel;
7241 bfd_byte *loc;
7242
7243 /* This symbol needs a copy reloc. Set it up. */
7244 BFD_ASSERT (h->dynindx != -1
7245 && (h->root.type == bfd_link_hash_defined
7246 || h->root.type == bfd_link_hash_defweak));
7247
7248 s = bfd_get_section_by_name (h->root.u.def.section->owner,
7249 RELOC_SECTION (htab, ".bss"));
7250 BFD_ASSERT (s != NULL);
7251
7252 rel.r_addend = 0;
7253 rel.r_offset = (h->root.u.def.value
7254 + h->root.u.def.section->output_section->vma
7255 + h->root.u.def.section->output_offset);
7256 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
7257 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
7258 SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc);
7259 }
7260
7261 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks,
7262 the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative
7263 to the ".got" section. */
7264 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7265 || (!htab->vxworks_p && h == htab->root.hgot))
7266 sym->st_shndx = SHN_ABS;
7267
7268 return TRUE;
7269 }
7270
7271 /* Finish up the dynamic sections. */
7272
7273 static bfd_boolean
7274 elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info)
7275 {
7276 bfd * dynobj;
7277 asection * sgot;
7278 asection * sdyn;
7279
7280 dynobj = elf_hash_table (info)->dynobj;
7281
7282 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
7283 BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL);
7284 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7285
7286 if (elf_hash_table (info)->dynamic_sections_created)
7287 {
7288 asection *splt;
7289 Elf32_External_Dyn *dyncon, *dynconend;
7290 struct elf32_arm_link_hash_table *htab;
7291
7292 htab = elf32_arm_hash_table (info);
7293 splt = bfd_get_section_by_name (dynobj, ".plt");
7294 BFD_ASSERT (splt != NULL && sdyn != NULL);
7295
7296 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7297 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7298
7299 for (; dyncon < dynconend; dyncon++)
7300 {
7301 Elf_Internal_Dyn dyn;
7302 const char * name;
7303 asection * s;
7304
7305 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7306
7307 switch (dyn.d_tag)
7308 {
7309 unsigned int type;
7310
7311 default:
7312 break;
7313
7314 case DT_HASH:
7315 name = ".hash";
7316 goto get_vma_if_bpabi;
7317 case DT_STRTAB:
7318 name = ".dynstr";
7319 goto get_vma_if_bpabi;
7320 case DT_SYMTAB:
7321 name = ".dynsym";
7322 goto get_vma_if_bpabi;
7323 case DT_VERSYM:
7324 name = ".gnu.version";
7325 goto get_vma_if_bpabi;
7326 case DT_VERDEF:
7327 name = ".gnu.version_d";
7328 goto get_vma_if_bpabi;
7329 case DT_VERNEED:
7330 name = ".gnu.version_r";
7331 goto get_vma_if_bpabi;
7332
7333 case DT_PLTGOT:
7334 name = ".got";
7335 goto get_vma;
7336 case DT_JMPREL:
7337 name = RELOC_SECTION (htab, ".plt");
7338 get_vma:
7339 s = bfd_get_section_by_name (output_bfd, name);
7340 BFD_ASSERT (s != NULL);
7341 if (!htab->symbian_p)
7342 dyn.d_un.d_ptr = s->vma;
7343 else
7344 /* In the BPABI, tags in the PT_DYNAMIC section point
7345 at the file offset, not the memory address, for the
7346 convenience of the post linker. */
7347 dyn.d_un.d_ptr = s->filepos;
7348 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7349 break;
7350
7351 get_vma_if_bpabi:
7352 if (htab->symbian_p)
7353 goto get_vma;
7354 break;
7355
7356 case DT_PLTRELSZ:
7357 s = bfd_get_section_by_name (output_bfd,
7358 RELOC_SECTION (htab, ".plt"));
7359 BFD_ASSERT (s != NULL);
7360 dyn.d_un.d_val = s->size;
7361 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7362 break;
7363
7364 case DT_RELSZ:
7365 case DT_RELASZ:
7366 if (!htab->symbian_p)
7367 {
7368 /* My reading of the SVR4 ABI indicates that the
7369 procedure linkage table relocs (DT_JMPREL) should be
7370 included in the overall relocs (DT_REL). This is
7371 what Solaris does. However, UnixWare can not handle
7372 that case. Therefore, we override the DT_RELSZ entry
7373 here to make it not include the JMPREL relocs. Since
7374 the linker script arranges for .rel(a).plt to follow all
7375 other relocation sections, we don't have to worry
7376 about changing the DT_REL entry. */
7377 s = bfd_get_section_by_name (output_bfd,
7378 RELOC_SECTION (htab, ".plt"));
7379 if (s != NULL)
7380 dyn.d_un.d_val -= s->size;
7381 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7382 break;
7383 }
7384 /* Fall through */
7385
7386 case DT_REL:
7387 case DT_RELA:
7388 /* In the BPABI, the DT_REL tag must point at the file
7389 offset, not the VMA, of the first relocation
7390 section. So, we use code similar to that in
7391 elflink.c, but do not check for SHF_ALLOC on the
7392 relcoation section, since relocations sections are
7393 never allocated under the BPABI. The comments above
7394 about Unixware notwithstanding, we include all of the
7395 relocations here. */
7396 if (htab->symbian_p)
7397 {
7398 unsigned int i;
7399 type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
7400 ? SHT_REL : SHT_RELA);
7401 dyn.d_un.d_val = 0;
7402 for (i = 1; i < elf_numsections (output_bfd); i++)
7403 {
7404 Elf_Internal_Shdr *hdr
7405 = elf_elfsections (output_bfd)[i];
7406 if (hdr->sh_type == type)
7407 {
7408 if (dyn.d_tag == DT_RELSZ
7409 || dyn.d_tag == DT_RELASZ)
7410 dyn.d_un.d_val += hdr->sh_size;
7411 else if ((ufile_ptr) hdr->sh_offset
7412 <= dyn.d_un.d_val - 1)
7413 dyn.d_un.d_val = hdr->sh_offset;
7414 }
7415 }
7416 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7417 }
7418 break;
7419
7420 /* Set the bottom bit of DT_INIT/FINI if the
7421 corresponding function is Thumb. */
7422 case DT_INIT:
7423 name = info->init_function;
7424 goto get_sym;
7425 case DT_FINI:
7426 name = info->fini_function;
7427 get_sym:
7428 /* If it wasn't set by elf_bfd_final_link
7429 then there is nothing to adjust. */
7430 if (dyn.d_un.d_val != 0)
7431 {
7432 struct elf_link_hash_entry * eh;
7433
7434 eh = elf_link_hash_lookup (elf_hash_table (info), name,
7435 FALSE, FALSE, TRUE);
7436 if (eh != (struct elf_link_hash_entry *) NULL
7437 && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
7438 {
7439 dyn.d_un.d_val |= 1;
7440 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7441 }
7442 }
7443 break;
7444 }
7445 }
7446
7447 /* Fill in the first entry in the procedure linkage table. */
7448 if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size)
7449 {
7450 const bfd_vma *plt0_entry;
7451 bfd_vma got_address, plt_address, got_displacement;
7452
7453 /* Calculate the addresses of the GOT and PLT. */
7454 got_address = sgot->output_section->vma + sgot->output_offset;
7455 plt_address = splt->output_section->vma + splt->output_offset;
7456
7457 if (htab->vxworks_p)
7458 {
7459 /* The VxWorks GOT is relocated by the dynamic linker.
7460 Therefore, we must emit relocations rather than simply
7461 computing the values now. */
7462 Elf_Internal_Rela rel;
7463
7464 plt0_entry = elf32_arm_vxworks_exec_plt0_entry;
7465 put_arm_insn (htab, output_bfd, plt0_entry[0],
7466 splt->contents + 0);
7467 put_arm_insn (htab, output_bfd, plt0_entry[1],
7468 splt->contents + 4);
7469 put_arm_insn (htab, output_bfd, plt0_entry[2],
7470 splt->contents + 8);
7471 bfd_put_32 (output_bfd, got_address, splt->contents + 12);
7472
7473 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */
7474 rel.r_offset = plt_address + 12;
7475 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
7476 rel.r_addend = 0;
7477 SWAP_RELOC_OUT (htab) (output_bfd, &rel,
7478 htab->srelplt2->contents);
7479 }
7480 else
7481 {
7482 got_displacement = got_address - (plt_address + 16);
7483
7484 plt0_entry = elf32_arm_plt0_entry;
7485 put_arm_insn (htab, output_bfd, plt0_entry[0],
7486 splt->contents + 0);
7487 put_arm_insn (htab, output_bfd, plt0_entry[1],
7488 splt->contents + 4);
7489 put_arm_insn (htab, output_bfd, plt0_entry[2],
7490 splt->contents + 8);
7491 put_arm_insn (htab, output_bfd, plt0_entry[3],
7492 splt->contents + 12);
7493
7494 #ifdef FOUR_WORD_PLT
7495 /* The displacement value goes in the otherwise-unused
7496 last word of the second entry. */
7497 bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
7498 #else
7499 bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
7500 #endif
7501 }
7502 }
7503
7504 /* UnixWare sets the entsize of .plt to 4, although that doesn't
7505 really seem like the right value. */
7506 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
7507
7508 if (htab->vxworks_p && !info->shared && htab->splt->size > 0)
7509 {
7510 /* Correct the .rel(a).plt.unloaded relocations. They will have
7511 incorrect symbol indexes. */
7512 int num_plts;
7513 unsigned char *p;
7514
7515 num_plts = ((htab->splt->size - htab->plt_header_size)
7516 / htab->plt_entry_size);
7517 p = htab->srelplt2->contents + RELOC_SIZE (htab);
7518
7519 for (; num_plts; num_plts--)
7520 {
7521 Elf_Internal_Rela rel;
7522
7523 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
7524 rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32);
7525 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
7526 p += RELOC_SIZE (htab);
7527
7528 SWAP_RELOC_IN (htab) (output_bfd, p, &rel);
7529 rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32);
7530 SWAP_RELOC_OUT (htab) (output_bfd, &rel, p);
7531 p += RELOC_SIZE (htab);
7532 }
7533 }
7534 }
7535
7536 /* Fill in the first three entries in the global offset table. */
7537 if (sgot)
7538 {
7539 if (sgot->size > 0)
7540 {
7541 if (sdyn == NULL)
7542 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
7543 else
7544 bfd_put_32 (output_bfd,
7545 sdyn->output_section->vma + sdyn->output_offset,
7546 sgot->contents);
7547 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
7548 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
7549 }
7550
7551 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
7552 }
7553
7554 return TRUE;
7555 }
7556
7557 static void
7558 elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
7559 {
7560 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
7561 struct elf32_arm_link_hash_table *globals;
7562
7563 i_ehdrp = elf_elfheader (abfd);
7564
7565 if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN)
7566 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM;
7567 else
7568 i_ehdrp->e_ident[EI_OSABI] = 0;
7569 i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
7570
7571 if (link_info)
7572 {
7573 globals = elf32_arm_hash_table (link_info);
7574 if (globals->byteswap_code)
7575 i_ehdrp->e_flags |= EF_ARM_BE8;
7576 }
7577 }
7578
7579 static enum elf_reloc_type_class
7580 elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
7581 {
7582 switch ((int) ELF32_R_TYPE (rela->r_info))
7583 {
7584 case R_ARM_RELATIVE:
7585 return reloc_class_relative;
7586 case R_ARM_JUMP_SLOT:
7587 return reloc_class_plt;
7588 case R_ARM_COPY:
7589 return reloc_class_copy;
7590 default:
7591 return reloc_class_normal;
7592 }
7593 }
7594
7595 /* Set the right machine number for an Arm ELF file. */
7596
7597 static bfd_boolean
7598 elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
7599 {
7600 if (hdr->sh_type == SHT_NOTE)
7601 *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
7602
7603 return TRUE;
7604 }
7605
7606 static void
7607 elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
7608 {
7609 bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
7610 }
7611
7612 /* Return TRUE if this is an unwinding table entry. */
7613
7614 static bfd_boolean
7615 is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
7616 {
7617 size_t len1, len2;
7618
7619 len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
7620 len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
7621 return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
7622 || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
7623 }
7624
7625
7626 /* Set the type and flags for an ARM section. We do this by
7627 the section name, which is a hack, but ought to work. */
7628
7629 static bfd_boolean
7630 elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
7631 {
7632 const char * name;
7633
7634 name = bfd_get_section_name (abfd, sec);
7635
7636 if (is_arm_elf_unwind_section_name (abfd, name))
7637 {
7638 hdr->sh_type = SHT_ARM_EXIDX;
7639 hdr->sh_flags |= SHF_LINK_ORDER;
7640 }
7641 else if (strcmp(name, ".ARM.attributes") == 0)
7642 {
7643 hdr->sh_type = SHT_ARM_ATTRIBUTES;
7644 }
7645 return TRUE;
7646 }
7647
7648 /* Parse an Arm EABI attributes section. */
7649 static void
7650 elf32_arm_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr)
7651 {
7652 bfd_byte *contents;
7653 bfd_byte *p;
7654 bfd_vma len;
7655
7656 contents = bfd_malloc (hdr->sh_size);
7657 if (!contents)
7658 return;
7659 if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0,
7660 hdr->sh_size))
7661 {
7662 free (contents);
7663 return;
7664 }
7665 p = contents;
7666 if (*(p++) == 'A')
7667 {
7668 len = hdr->sh_size - 1;
7669 while (len > 0)
7670 {
7671 int namelen;
7672 bfd_vma section_len;
7673
7674 section_len = bfd_get_32 (abfd, p);
7675 p += 4;
7676 if (section_len > len)
7677 section_len = len;
7678 len -= section_len;
7679 namelen = strlen ((char *)p) + 1;
7680 section_len -= namelen + 4;
7681 if (strcmp((char *)p, "aeabi") != 0)
7682 {
7683 /* Vendor section. Ignore it. */
7684 p += namelen + section_len;
7685 }
7686 else
7687 {
7688 p += namelen;
7689 while (section_len > 0)
7690 {
7691 int tag;
7692 unsigned int n;
7693 unsigned int val;
7694 bfd_vma subsection_len;
7695 bfd_byte *end;
7696
7697 tag = read_unsigned_leb128 (abfd, p, &n);
7698 p += n;
7699 subsection_len = bfd_get_32 (abfd, p);
7700 p += 4;
7701 if (subsection_len > section_len)
7702 subsection_len = section_len;
7703 section_len -= subsection_len;
7704 subsection_len -= n + 4;
7705 end = p + subsection_len;
7706 switch (tag)
7707 {
7708 case Tag_File:
7709 while (p < end)
7710 {
7711 bfd_boolean is_string;
7712
7713 tag = read_unsigned_leb128 (abfd, p, &n);
7714 p += n;
7715 if (tag == 4 || tag == 5)
7716 is_string = 1;
7717 else if (tag < 32)
7718 is_string = 0;
7719 else
7720 is_string = (tag & 1) != 0;
7721 if (tag == Tag_compatibility)
7722 {
7723 val = read_unsigned_leb128 (abfd, p, &n);
7724 p += n;
7725 elf32_arm_add_eabi_attr_compat (abfd, val,
7726 (char *)p);
7727 p += strlen ((char *)p) + 1;
7728 }
7729 else if (is_string)
7730 {
7731 elf32_arm_add_eabi_attr_string (abfd, tag,
7732 (char *)p);
7733 p += strlen ((char *)p) + 1;
7734 }
7735 else
7736 {
7737 val = read_unsigned_leb128 (abfd, p, &n);
7738 p += n;
7739 elf32_arm_add_eabi_attr_int (abfd, tag, val);
7740 }
7741 }
7742 break;
7743 case Tag_Section:
7744 case Tag_Symbol:
7745 /* Don't have anywhere convenient to attach these.
7746 Fall through for now. */
7747 default:
7748 /* Ignore things we don't kow about. */
7749 p += subsection_len;
7750 subsection_len = 0;
7751 break;
7752 }
7753 }
7754 }
7755 }
7756 }
7757 free (contents);
7758 }
7759
7760 /* Handle an ARM specific section when reading an object file. This is
7761 called when bfd_section_from_shdr finds a section with an unknown
7762 type. */
7763
7764 static bfd_boolean
7765 elf32_arm_section_from_shdr (bfd *abfd,
7766 Elf_Internal_Shdr * hdr,
7767 const char *name,
7768 int shindex)
7769 {
7770 /* There ought to be a place to keep ELF backend specific flags, but
7771 at the moment there isn't one. We just keep track of the
7772 sections by their name, instead. Fortunately, the ABI gives
7773 names for all the ARM specific sections, so we will probably get
7774 away with this. */
7775 switch (hdr->sh_type)
7776 {
7777 case SHT_ARM_EXIDX:
7778 case SHT_ARM_PREEMPTMAP:
7779 case SHT_ARM_ATTRIBUTES:
7780 break;
7781
7782 default:
7783 return FALSE;
7784 }
7785
7786 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7787 return FALSE;
7788
7789 if (hdr->sh_type == SHT_ARM_ATTRIBUTES)
7790 elf32_arm_parse_attributes(abfd, hdr);
7791 return TRUE;
7792 }
7793
7794 /* A structure used to record a list of sections, independently
7795 of the next and prev fields in the asection structure. */
7796 typedef struct section_list
7797 {
7798 asection * sec;
7799 struct section_list * next;
7800 struct section_list * prev;
7801 }
7802 section_list;
7803
7804 /* Unfortunately we need to keep a list of sections for which
7805 an _arm_elf_section_data structure has been allocated. This
7806 is because it is possible for functions like elf32_arm_write_section
7807 to be called on a section which has had an elf_data_structure
7808 allocated for it (and so the used_by_bfd field is valid) but
7809 for which the ARM extended version of this structure - the
7810 _arm_elf_section_data structure - has not been allocated. */
7811 static section_list * sections_with_arm_elf_section_data = NULL;
7812
7813 static void
7814 record_section_with_arm_elf_section_data (asection * sec)
7815 {
7816 struct section_list * entry;
7817
7818 entry = bfd_malloc (sizeof (* entry));
7819 if (entry == NULL)
7820 return;
7821 entry->sec = sec;
7822 entry->next = sections_with_arm_elf_section_data;
7823 entry->prev = NULL;
7824 if (entry->next != NULL)
7825 entry->next->prev = entry;
7826 sections_with_arm_elf_section_data = entry;
7827 }
7828
7829 static struct section_list *
7830 find_arm_elf_section_entry (asection * sec)
7831 {
7832 struct section_list * entry;
7833 static struct section_list * last_entry = NULL;
7834
7835 /* This is a short cut for the typical case where the sections are added
7836 to the sections_with_arm_elf_section_data list in forward order and
7837 then looked up here in backwards order. This makes a real difference
7838 to the ld-srec/sec64k.exp linker test. */
7839 entry = sections_with_arm_elf_section_data;
7840 if (last_entry != NULL)
7841 {
7842 if (last_entry->sec == sec)
7843 entry = last_entry;
7844 else if (last_entry->next != NULL
7845 && last_entry->next->sec == sec)
7846 entry = last_entry->next;
7847 }
7848
7849 for (; entry; entry = entry->next)
7850 if (entry->sec == sec)
7851 break;
7852
7853 if (entry)
7854 /* Record the entry prior to this one - it is the entry we are most
7855 likely to want to locate next time. Also this way if we have been
7856 called from unrecord_section_with_arm_elf_section_data() we will not
7857 be caching a pointer that is about to be freed. */
7858 last_entry = entry->prev;
7859
7860 return entry;
7861 }
7862
7863 static _arm_elf_section_data *
7864 get_arm_elf_section_data (asection * sec)
7865 {
7866 struct section_list * entry;
7867
7868 entry = find_arm_elf_section_entry (sec);
7869
7870 if (entry)
7871 return elf32_arm_section_data (entry->sec);
7872 else
7873 return NULL;
7874 }
7875
7876 static void
7877 unrecord_section_with_arm_elf_section_data (asection * sec)
7878 {
7879 struct section_list * entry;
7880
7881 entry = find_arm_elf_section_entry (sec);
7882
7883 if (entry)
7884 {
7885 if (entry->prev != NULL)
7886 entry->prev->next = entry->next;
7887 if (entry->next != NULL)
7888 entry->next->prev = entry->prev;
7889 if (entry == sections_with_arm_elf_section_data)
7890 sections_with_arm_elf_section_data = entry->next;
7891 free (entry);
7892 }
7893 }
7894
7895 /* Called for each symbol. Builds a section map based on mapping symbols.
7896 Does not alter any of the symbols. */
7897
7898 static bfd_boolean
7899 elf32_arm_output_symbol_hook (struct bfd_link_info *info,
7900 const char *name,
7901 Elf_Internal_Sym *elfsym,
7902 asection *input_sec,
7903 struct elf_link_hash_entry *h)
7904 {
7905 int mapcount;
7906 elf32_arm_section_map *map;
7907 elf32_arm_section_map *newmap;
7908 _arm_elf_section_data *arm_data;
7909 struct elf32_arm_link_hash_table *globals;
7910
7911 globals = elf32_arm_hash_table (info);
7912 if (globals->vxworks_p
7913 && !elf_vxworks_link_output_symbol_hook (info, name, elfsym,
7914 input_sec, h))
7915 return FALSE;
7916
7917 /* Only do this on final link. */
7918 if (info->relocatable)
7919 return TRUE;
7920
7921 /* Only build a map if we need to byteswap code. */
7922 if (!globals->byteswap_code)
7923 return TRUE;
7924
7925 /* We only want mapping symbols. */
7926 if (!bfd_is_arm_special_symbol_name (name, BFD_ARM_SPECIAL_SYM_TYPE_MAP))
7927 return TRUE;
7928
7929 /* If this section has not been allocated an _arm_elf_section_data
7930 structure then we cannot record anything. */
7931 arm_data = get_arm_elf_section_data (input_sec);
7932 if (arm_data == NULL)
7933 return TRUE;
7934
7935 mapcount = arm_data->mapcount + 1;
7936 map = arm_data->map;
7937
7938 /* TODO: This may be inefficient, but we probably don't usually have many
7939 mapping symbols per section. */
7940 newmap = bfd_realloc (map, mapcount * sizeof (* map));
7941 if (newmap != NULL)
7942 {
7943 arm_data->map = newmap;
7944 arm_data->mapcount = mapcount;
7945
7946 newmap[mapcount - 1].vma = elfsym->st_value;
7947 newmap[mapcount - 1].type = name[1];
7948 }
7949
7950 return TRUE;
7951 }
7952
7953 typedef struct
7954 {
7955 void *finfo;
7956 struct bfd_link_info *info;
7957 int plt_shndx;
7958 bfd_vma plt_offset;
7959 bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *,
7960 asection *, struct elf_link_hash_entry *);
7961 } output_arch_syminfo;
7962
7963 enum map_symbol_type
7964 {
7965 ARM_MAP_ARM,
7966 ARM_MAP_THUMB,
7967 ARM_MAP_DATA
7968 };
7969
7970
7971 /* Output a single PLT mapping symbol. */
7972
7973 static bfd_boolean
7974 elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi,
7975 enum map_symbol_type type,
7976 bfd_vma offset)
7977 {
7978 static const char *names[3] = {"$a", "$t", "$d"};
7979 struct elf32_arm_link_hash_table *htab;
7980 Elf_Internal_Sym sym;
7981
7982 htab = elf32_arm_hash_table (osi->info);
7983 sym.st_value = osi->plt_offset + offset;
7984 sym.st_size = 0;
7985 sym.st_other = 0;
7986 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7987 sym.st_shndx = osi->plt_shndx;
7988 if (!osi->func (osi->finfo, names[type], &sym, htab->splt, NULL))
7989 return FALSE;
7990 return TRUE;
7991 }
7992
7993
7994 /* Output mapping symbols for PLT entries associated with H. */
7995
7996 static bfd_boolean
7997 elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf)
7998 {
7999 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
8000 struct elf32_arm_link_hash_table *htab;
8001 struct elf32_arm_link_hash_entry *eh;
8002 bfd_vma addr;
8003
8004 htab = elf32_arm_hash_table (osi->info);
8005
8006 if (h->root.type == bfd_link_hash_indirect)
8007 return TRUE;
8008
8009 if (h->root.type == bfd_link_hash_warning)
8010 /* When warning symbols are created, they **replace** the "real"
8011 entry in the hash table, thus we never get to see the real
8012 symbol in a hash traversal. So look at it now. */
8013 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8014
8015 if (h->plt.offset == (bfd_vma) -1)
8016 return TRUE;
8017
8018 eh = (struct elf32_arm_link_hash_entry *) h;
8019 addr = h->plt.offset;
8020 if (htab->symbian_p)
8021 {
8022 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
8023 return FALSE;
8024 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4))
8025 return FALSE;
8026 }
8027 else if (htab->vxworks_p)
8028 {
8029 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
8030 return FALSE;
8031 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8))
8032 return FALSE;
8033 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12))
8034 return FALSE;
8035 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20))
8036 return FALSE;
8037 }
8038 else
8039 {
8040 bfd_boolean thumb_stub;
8041
8042 thumb_stub = eh->plt_thumb_refcount > 0 && !htab->use_blx;
8043 if (thumb_stub)
8044 {
8045 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4))
8046 return FALSE;
8047 }
8048 #ifdef FOUR_WORD_PLT
8049 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
8050 return FALSE;
8051 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12))
8052 return FALSE;
8053 #else
8054 /* A three-word PLT with no Thumb thunk contains only Arm code,
8055 so only need to output a mapping symbol for the first PLT entry and
8056 entries with thumb thunks. */
8057 if (thumb_stub || addr == 20)
8058 {
8059 if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr))
8060 return FALSE;
8061 }
8062 #endif
8063 }
8064
8065 return TRUE;
8066 }
8067
8068
8069 /* Output mapping symbols for the PLT. */
8070
8071 static bfd_boolean
8072 elf32_arm_output_arch_local_syms (bfd *output_bfd,
8073 struct bfd_link_info *info,
8074 void *finfo, bfd_boolean (*func) (void *, const char *,
8075 Elf_Internal_Sym *,
8076 asection *,
8077 struct elf_link_hash_entry *))
8078 {
8079 output_arch_syminfo osi;
8080 struct elf32_arm_link_hash_table *htab;
8081
8082 htab = elf32_arm_hash_table (info);
8083 if (!htab->splt || htab->splt->size == 0)
8084 return TRUE;
8085
8086 check_use_blx(htab);
8087 osi.finfo = finfo;
8088 osi.info = info;
8089 osi.func = func;
8090 osi.plt_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
8091 htab->splt->output_section);
8092 osi.plt_offset = htab->splt->output_section->vma;
8093
8094 /* Output mapping symbols for the plt header. SymbianOS does not have a
8095 plt header. */
8096 if (htab->vxworks_p)
8097 {
8098 /* VxWorks shared libraries have no PLT header. */
8099 if (!info->shared)
8100 {
8101 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
8102 return FALSE;
8103 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12))
8104 return FALSE;
8105 }
8106 }
8107 else if (!htab->symbian_p)
8108 {
8109 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0))
8110 return FALSE;
8111 #ifndef FOUR_WORD_PLT
8112 if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16))
8113 return FALSE;
8114 #endif
8115 }
8116
8117 elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi);
8118 return TRUE;
8119 }
8120
8121 /* Allocate target specific section data. */
8122
8123 static bfd_boolean
8124 elf32_arm_new_section_hook (bfd *abfd, asection *sec)
8125 {
8126 if (!sec->used_by_bfd)
8127 {
8128 _arm_elf_section_data *sdata;
8129 bfd_size_type amt = sizeof (*sdata);
8130
8131 sdata = bfd_zalloc (abfd, amt);
8132 if (sdata == NULL)
8133 return FALSE;
8134 sec->used_by_bfd = sdata;
8135 }
8136
8137 record_section_with_arm_elf_section_data (sec);
8138
8139 return _bfd_elf_new_section_hook (abfd, sec);
8140 }
8141
8142
8143 /* Used to order a list of mapping symbols by address. */
8144
8145 static int
8146 elf32_arm_compare_mapping (const void * a, const void * b)
8147 {
8148 return ((const elf32_arm_section_map *) a)->vma
8149 > ((const elf32_arm_section_map *) b)->vma;
8150 }
8151
8152
8153 /* Do code byteswapping. Return FALSE afterwards so that the section is
8154 written out as normal. */
8155
8156 static bfd_boolean
8157 elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
8158 bfd_byte *contents)
8159 {
8160 int mapcount;
8161 _arm_elf_section_data *arm_data;
8162 elf32_arm_section_map *map;
8163 bfd_vma ptr;
8164 bfd_vma end;
8165 bfd_vma offset;
8166 bfd_byte tmp;
8167 int i;
8168
8169 /* If this section has not been allocated an _arm_elf_section_data
8170 structure then we cannot record anything. */
8171 arm_data = get_arm_elf_section_data (sec);
8172 if (arm_data == NULL)
8173 return FALSE;
8174
8175 mapcount = arm_data->mapcount;
8176 map = arm_data->map;
8177
8178 if (mapcount == 0)
8179 return FALSE;
8180
8181 qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping);
8182
8183 offset = sec->output_section->vma + sec->output_offset;
8184 ptr = map[0].vma - offset;
8185 for (i = 0; i < mapcount; i++)
8186 {
8187 if (i == mapcount - 1)
8188 end = sec->size;
8189 else
8190 end = map[i + 1].vma - offset;
8191
8192 switch (map[i].type)
8193 {
8194 case 'a':
8195 /* Byte swap code words. */
8196 while (ptr + 3 < end)
8197 {
8198 tmp = contents[ptr];
8199 contents[ptr] = contents[ptr + 3];
8200 contents[ptr + 3] = tmp;
8201 tmp = contents[ptr + 1];
8202 contents[ptr + 1] = contents[ptr + 2];
8203 contents[ptr + 2] = tmp;
8204 ptr += 4;
8205 }
8206 break;
8207
8208 case 't':
8209 /* Byte swap code halfwords. */
8210 while (ptr + 1 < end)
8211 {
8212 tmp = contents[ptr];
8213 contents[ptr] = contents[ptr + 1];
8214 contents[ptr + 1] = tmp;
8215 ptr += 2;
8216 }
8217 break;
8218
8219 case 'd':
8220 /* Leave data alone. */
8221 break;
8222 }
8223 ptr = end;
8224 }
8225
8226 free (map);
8227 arm_data->mapcount = 0;
8228 arm_data->map = NULL;
8229 unrecord_section_with_arm_elf_section_data (sec);
8230
8231 return FALSE;
8232 }
8233
8234 static void
8235 unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED,
8236 asection * sec,
8237 void * ignore ATTRIBUTE_UNUSED)
8238 {
8239 unrecord_section_with_arm_elf_section_data (sec);
8240 }
8241
8242 static bfd_boolean
8243 elf32_arm_close_and_cleanup (bfd * abfd)
8244 {
8245 if (abfd->sections)
8246 bfd_map_over_sections (abfd,
8247 unrecord_section_via_map_over_sections,
8248 NULL);
8249
8250 return _bfd_elf_close_and_cleanup (abfd);
8251 }
8252
8253 static bfd_boolean
8254 elf32_arm_bfd_free_cached_info (bfd * abfd)
8255 {
8256 if (abfd->sections)
8257 bfd_map_over_sections (abfd,
8258 unrecord_section_via_map_over_sections,
8259 NULL);
8260
8261 return _bfd_free_cached_info (abfd);
8262 }
8263
8264 /* Display STT_ARM_TFUNC symbols as functions. */
8265
8266 static void
8267 elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
8268 asymbol *asym)
8269 {
8270 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
8271
8272 if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC)
8273 elfsym->symbol.flags |= BSF_FUNCTION;
8274 }
8275
8276
8277 /* Mangle thumb function symbols as we read them in. */
8278
8279 static void
8280 elf32_arm_swap_symbol_in (bfd * abfd,
8281 const void *psrc,
8282 const void *pshn,
8283 Elf_Internal_Sym *dst)
8284 {
8285 bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst);
8286
8287 /* New EABI objects mark thumb function symbols by setting the low bit of
8288 the address. Turn these into STT_ARM_TFUNC. */
8289 if (ELF_ST_TYPE (dst->st_info) == STT_FUNC
8290 && (dst->st_value & 1))
8291 {
8292 dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC);
8293 dst->st_value &= ~(bfd_vma) 1;
8294 }
8295 }
8296
8297
8298 /* Mangle thumb function symbols as we write them out. */
8299
8300 static void
8301 elf32_arm_swap_symbol_out (bfd *abfd,
8302 const Elf_Internal_Sym *src,
8303 void *cdst,
8304 void *shndx)
8305 {
8306 Elf_Internal_Sym newsym;
8307
8308 /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit
8309 of the address set, as per the new EABI. We do this unconditionally
8310 because objcopy does not set the elf header flags until after
8311 it writes out the symbol table. */
8312 if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC)
8313 {
8314 newsym = *src;
8315 newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC);
8316 newsym.st_value |= 1;
8317
8318 src = &newsym;
8319 }
8320 bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx);
8321 }
8322
8323 /* Add the PT_ARM_EXIDX program header. */
8324
8325 static bfd_boolean
8326 elf32_arm_modify_segment_map (bfd *abfd,
8327 struct bfd_link_info *info ATTRIBUTE_UNUSED)
8328 {
8329 struct elf_segment_map *m;
8330 asection *sec;
8331
8332 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
8333 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
8334 {
8335 /* If there is already a PT_ARM_EXIDX header, then we do not
8336 want to add another one. This situation arises when running
8337 "strip"; the input binary already has the header. */
8338 m = elf_tdata (abfd)->segment_map;
8339 while (m && m->p_type != PT_ARM_EXIDX)
8340 m = m->next;
8341 if (!m)
8342 {
8343 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
8344 if (m == NULL)
8345 return FALSE;
8346 m->p_type = PT_ARM_EXIDX;
8347 m->count = 1;
8348 m->sections[0] = sec;
8349
8350 m->next = elf_tdata (abfd)->segment_map;
8351 elf_tdata (abfd)->segment_map = m;
8352 }
8353 }
8354
8355 return TRUE;
8356 }
8357
8358 /* We may add a PT_ARM_EXIDX program header. */
8359
8360 static int
8361 elf32_arm_additional_program_headers (bfd *abfd)
8362 {
8363 asection *sec;
8364
8365 sec = bfd_get_section_by_name (abfd, ".ARM.exidx");
8366 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
8367 return 1;
8368 else
8369 return 0;
8370 }
8371
8372 /* We use this to override swap_symbol_in and swap_symbol_out. */
8373 const struct elf_size_info elf32_arm_size_info = {
8374 sizeof (Elf32_External_Ehdr),
8375 sizeof (Elf32_External_Phdr),
8376 sizeof (Elf32_External_Shdr),
8377 sizeof (Elf32_External_Rel),
8378 sizeof (Elf32_External_Rela),
8379 sizeof (Elf32_External_Sym),
8380 sizeof (Elf32_External_Dyn),
8381 sizeof (Elf_External_Note),
8382 4,
8383 1,
8384 32, 2,
8385 ELFCLASS32, EV_CURRENT,
8386 bfd_elf32_write_out_phdrs,
8387 bfd_elf32_write_shdrs_and_ehdr,
8388 bfd_elf32_write_relocs,
8389 elf32_arm_swap_symbol_in,
8390 elf32_arm_swap_symbol_out,
8391 bfd_elf32_slurp_reloc_table,
8392 bfd_elf32_slurp_symbol_table,
8393 bfd_elf32_swap_dyn_in,
8394 bfd_elf32_swap_dyn_out,
8395 bfd_elf32_swap_reloc_in,
8396 bfd_elf32_swap_reloc_out,
8397 bfd_elf32_swap_reloca_in,
8398 bfd_elf32_swap_reloca_out
8399 };
8400
8401 #define ELF_ARCH bfd_arch_arm
8402 #define ELF_MACHINE_CODE EM_ARM
8403 #ifdef __QNXTARGET__
8404 #define ELF_MAXPAGESIZE 0x1000
8405 #else
8406 #define ELF_MAXPAGESIZE 0x8000
8407 #endif
8408 #define ELF_MINPAGESIZE 0x1000
8409 #define ELF_COMMONPAGESIZE 0x1000
8410
8411 #define bfd_elf32_mkobject elf32_arm_mkobject
8412
8413 #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
8414 #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
8415 #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
8416 #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
8417 #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
8418 #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
8419 #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
8420 #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info
8421 #define bfd_elf32_new_section_hook elf32_arm_new_section_hook
8422 #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol
8423 #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup
8424 #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info
8425 #define bfd_elf32_bfd_final_link elf32_arm_bfd_final_link
8426
8427 #define elf_backend_get_symbol_type elf32_arm_get_symbol_type
8428 #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
8429 #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
8430 #define elf_backend_check_relocs elf32_arm_check_relocs
8431 #define elf_backend_relocate_section elf32_arm_relocate_section
8432 #define elf_backend_write_section elf32_arm_write_section
8433 #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
8434 #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
8435 #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
8436 #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
8437 #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook
8438 #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
8439 #define elf_backend_post_process_headers elf32_arm_post_process_headers
8440 #define elf_backend_reloc_type_class elf32_arm_reloc_type_class
8441 #define elf_backend_object_p elf32_arm_object_p
8442 #define elf_backend_section_flags elf32_arm_section_flags
8443 #define elf_backend_fake_sections elf32_arm_fake_sections
8444 #define elf_backend_section_from_shdr elf32_arm_section_from_shdr
8445 #define elf_backend_final_write_processing elf32_arm_final_write_processing
8446 #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
8447 #define elf_backend_symbol_processing elf32_arm_symbol_processing
8448 #define elf_backend_size_info elf32_arm_size_info
8449 #define elf_backend_modify_segment_map elf32_arm_modify_segment_map
8450 #define elf_backend_additional_program_headers \
8451 elf32_arm_additional_program_headers
8452 #define elf_backend_output_arch_local_syms \
8453 elf32_arm_output_arch_local_syms
8454
8455 #define elf_backend_can_refcount 1
8456 #define elf_backend_can_gc_sections 1
8457 #define elf_backend_plt_readonly 1
8458 #define elf_backend_want_got_plt 1
8459 #define elf_backend_want_plt_sym 0
8460 #define elf_backend_may_use_rel_p 1
8461 #define elf_backend_may_use_rela_p 0
8462 #define elf_backend_default_use_rela_p 0
8463 #define elf_backend_rela_normal 0
8464
8465 #define elf_backend_got_header_size 12
8466
8467 #include "elf32-target.h"
8468
8469 /* VxWorks Targets */
8470
8471 #undef TARGET_LITTLE_SYM
8472 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec
8473 #undef TARGET_LITTLE_NAME
8474 #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks"
8475 #undef TARGET_BIG_SYM
8476 #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec
8477 #undef TARGET_BIG_NAME
8478 #define TARGET_BIG_NAME "elf32-bigarm-vxworks"
8479
8480 /* Like elf32_arm_link_hash_table_create -- but overrides
8481 appropriately for VxWorks. */
8482 static struct bfd_link_hash_table *
8483 elf32_arm_vxworks_link_hash_table_create (bfd *abfd)
8484 {
8485 struct bfd_link_hash_table *ret;
8486
8487 ret = elf32_arm_link_hash_table_create (abfd);
8488 if (ret)
8489 {
8490 struct elf32_arm_link_hash_table *htab
8491 = (struct elf32_arm_link_hash_table *) ret;
8492 htab->use_rel = 0;
8493 htab->vxworks_p = 1;
8494 }
8495 return ret;
8496 }
8497
8498 static void
8499 elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8500 {
8501 elf32_arm_final_write_processing (abfd, linker);
8502 elf_vxworks_final_write_processing (abfd, linker);
8503 }
8504
8505 #undef elf32_bed
8506 #define elf32_bed elf32_arm_vxworks_bed
8507
8508 #undef bfd_elf32_bfd_link_hash_table_create
8509 #define bfd_elf32_bfd_link_hash_table_create \
8510 elf32_arm_vxworks_link_hash_table_create
8511 #undef elf_backend_add_symbol_hook
8512 #define elf_backend_add_symbol_hook \
8513 elf_vxworks_add_symbol_hook
8514 #undef elf_backend_final_write_processing
8515 #define elf_backend_final_write_processing \
8516 elf32_arm_vxworks_final_write_processing
8517 #undef elf_backend_emit_relocs
8518 #define elf_backend_emit_relocs \
8519 elf_vxworks_emit_relocs
8520
8521 #undef elf_backend_may_use_rel_p
8522 #define elf_backend_may_use_rel_p 0
8523 #undef elf_backend_may_use_rela_p
8524 #define elf_backend_may_use_rela_p 1
8525 #undef elf_backend_default_use_rela_p
8526 #define elf_backend_default_use_rela_p 1
8527 #undef elf_backend_rela_normal
8528 #define elf_backend_rela_normal 1
8529 #undef elf_backend_want_plt_sym
8530 #define elf_backend_want_plt_sym 1
8531 #undef ELF_MAXPAGESIZE
8532 #define ELF_MAXPAGESIZE 0x1000
8533
8534 #include "elf32-target.h"
8535
8536
8537 /* Symbian OS Targets */
8538
8539 #undef TARGET_LITTLE_SYM
8540 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec
8541 #undef TARGET_LITTLE_NAME
8542 #define TARGET_LITTLE_NAME "elf32-littlearm-symbian"
8543 #undef TARGET_BIG_SYM
8544 #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec
8545 #undef TARGET_BIG_NAME
8546 #define TARGET_BIG_NAME "elf32-bigarm-symbian"
8547
8548 /* Like elf32_arm_link_hash_table_create -- but overrides
8549 appropriately for Symbian OS. */
8550 static struct bfd_link_hash_table *
8551 elf32_arm_symbian_link_hash_table_create (bfd *abfd)
8552 {
8553 struct bfd_link_hash_table *ret;
8554
8555 ret = elf32_arm_link_hash_table_create (abfd);
8556 if (ret)
8557 {
8558 struct elf32_arm_link_hash_table *htab
8559 = (struct elf32_arm_link_hash_table *)ret;
8560 /* There is no PLT header for Symbian OS. */
8561 htab->plt_header_size = 0;
8562 /* The PLT entries are each three instructions. */
8563 htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry);
8564 htab->symbian_p = 1;
8565 /* Symbian uses armv5t or above, so use_blx is always true. */
8566 htab->use_blx = 1;
8567 htab->root.is_relocatable_executable = 1;
8568 }
8569 return ret;
8570 }
8571
8572 static const struct bfd_elf_special_section
8573 elf32_arm_symbian_special_sections[] =
8574 {
8575 /* In a BPABI executable, the dynamic linking sections do not go in
8576 the loadable read-only segment. The post-linker may wish to
8577 refer to these sections, but they are not part of the final
8578 program image. */
8579 { ".dynamic", 8, 0, SHT_DYNAMIC, 0 },
8580 { ".dynstr", 7, 0, SHT_STRTAB, 0 },
8581 { ".dynsym", 7, 0, SHT_DYNSYM, 0 },
8582 { ".got", 4, 0, SHT_PROGBITS, 0 },
8583 { ".hash", 5, 0, SHT_HASH, 0 },
8584 /* These sections do not need to be writable as the SymbianOS
8585 postlinker will arrange things so that no dynamic relocation is
8586 required. */
8587 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC },
8588 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC },
8589 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC },
8590 { NULL, 0, 0, 0, 0 }
8591 };
8592
8593 static void
8594 elf32_arm_symbian_begin_write_processing (bfd *abfd,
8595 struct bfd_link_info *link_info
8596 ATTRIBUTE_UNUSED)
8597 {
8598 /* BPABI objects are never loaded directly by an OS kernel; they are
8599 processed by a postlinker first, into an OS-specific format. If
8600 the D_PAGED bit is set on the file, BFD will align segments on
8601 page boundaries, so that an OS can directly map the file. With
8602 BPABI objects, that just results in wasted space. In addition,
8603 because we clear the D_PAGED bit, map_sections_to_segments will
8604 recognize that the program headers should not be mapped into any
8605 loadable segment. */
8606 abfd->flags &= ~D_PAGED;
8607 }
8608
8609 static bfd_boolean
8610 elf32_arm_symbian_modify_segment_map (bfd *abfd,
8611 struct bfd_link_info *info)
8612 {
8613 struct elf_segment_map *m;
8614 asection *dynsec;
8615
8616 /* BPABI shared libraries and executables should have a PT_DYNAMIC
8617 segment. However, because the .dynamic section is not marked
8618 with SEC_LOAD, the generic ELF code will not create such a
8619 segment. */
8620 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
8621 if (dynsec)
8622 {
8623 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
8624 m->next = elf_tdata (abfd)->segment_map;
8625 elf_tdata (abfd)->segment_map = m;
8626 }
8627
8628 /* Also call the generic arm routine. */
8629 return elf32_arm_modify_segment_map (abfd, info);
8630 }
8631
8632 #undef elf32_bed
8633 #define elf32_bed elf32_arm_symbian_bed
8634
8635 /* The dynamic sections are not allocated on SymbianOS; the postlinker
8636 will process them and then discard them. */
8637 #undef ELF_DYNAMIC_SEC_FLAGS
8638 #define ELF_DYNAMIC_SEC_FLAGS \
8639 (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED)
8640
8641 #undef bfd_elf32_bfd_link_hash_table_create
8642 #define bfd_elf32_bfd_link_hash_table_create \
8643 elf32_arm_symbian_link_hash_table_create
8644 #undef elf_backend_add_symbol_hook
8645
8646 #undef elf_backend_special_sections
8647 #define elf_backend_special_sections elf32_arm_symbian_special_sections
8648
8649 #undef elf_backend_begin_write_processing
8650 #define elf_backend_begin_write_processing \
8651 elf32_arm_symbian_begin_write_processing
8652 #undef elf_backend_final_write_processing
8653 #define elf_backend_final_write_processing \
8654 elf32_arm_final_write_processing
8655 #undef elf_backend_emit_relocs
8656
8657 #undef elf_backend_modify_segment_map
8658 #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map
8659
8660 /* There is no .got section for BPABI objects, and hence no header. */
8661 #undef elf_backend_got_header_size
8662 #define elf_backend_got_header_size 0
8663
8664 /* Similarly, there is no .got.plt section. */
8665 #undef elf_backend_want_got_plt
8666 #define elf_backend_want_got_plt 0
8667
8668 #undef elf_backend_may_use_rel_p
8669 #define elf_backend_may_use_rel_p 1
8670 #undef elf_backend_may_use_rela_p
8671 #define elf_backend_may_use_rela_p 0
8672 #undef elf_backend_default_use_rela_p
8673 #define elf_backend_default_use_rela_p 0
8674 #undef elf_backend_rela_normal
8675 #define elf_backend_rela_normal 0
8676 #undef elf_backend_want_plt_sym
8677 #define elf_backend_want_plt_sym 0
8678 #undef ELF_MAXPAGESIZE
8679 #define ELF_MAXPAGESIZE 0x8000
8680
8681 #include "elf32-target.h"
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