Commit | Line | Data |
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177b1932 | 1 | /* BFD back-end for ARM COFF files. |
f6727b90 ILT |
2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 1998 |
3 | Free Software Foundation, Inc. | |
943fbd5b KR |
4 | Written by Cygnus Support. |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
943fbd5b KR |
25 | |
26 | #include "coff/arm.h" | |
27 | ||
28 | #include "coff/internal.h" | |
29 | ||
30 | #ifdef COFF_WITH_PE | |
31 | #include "coff/pe.h" | |
32 | #endif | |
33 | ||
34 | #include "libcoff.h" | |
35 | ||
7d6d10f9 NC |
36 | /* Macros for manipulation the bits in the flags field of the coff data |
37 | structure. */ | |
e1aeb285 NC |
38 | #define APCS_26_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_26) |
39 | #define APCS_FLOAT_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_FLOAT) | |
40 | #define PIC_FLAG( abfd ) (coff_data (abfd)->flags & F_PIC) | |
41 | #define APCS_SET( abfd ) (coff_data (abfd)->flags & F_APCS_SET) | |
42 | #define SET_APCS_FLAGS( abfd, flgs) (coff_data (abfd)->flags = \ | |
43 | (coff_data (abfd)->flags & ~ (F_APCS_26 | F_APCS_FLOAT | F_PIC)) \ | |
44 | | (flgs | F_APCS_SET)) | |
45 | #define INTERWORK_FLAG( abfd ) (coff_data (abfd)->flags & F_INTERWORK) | |
46 | #define INTERWORK_SET( abfd ) (coff_data (abfd)->flags & F_INTERWORK_SET) | |
47 | #define SET_INTERWORK_FLAG( abfd, flg ) (coff_data (abfd)->flags = \ | |
48 | (coff_data (abfd)->flags & ~ F_INTERWORK) \ | |
49 | | (flg | F_INTERWORK_SET)) | |
50 | ||
51 | ||
52 | static boolean coff_arm_relocate_section | |
53 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
54 | struct internal_reloc *, struct internal_syment *, asection **)); | |
55 | ||
943fbd5b KR |
56 | static bfd_reloc_status_type |
57 | aoutarm_fix_pcrel_26_done PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
58 | asection *, bfd *, char **)); | |
59 | ||
60 | static bfd_reloc_status_type | |
61 | aoutarm_fix_pcrel_26 PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
62 | asection *, bfd *, char **)); | |
63 | ||
e1aeb285 NC |
64 | static bfd_reloc_status_type |
65 | coff_thumb_pcrel_23 PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
66 | asection *, bfd *, char **)); | |
67 | ||
68 | static bfd_reloc_status_type | |
69 | coff_thumb_pcrel_12 PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
70 | asection *, bfd *, char **)); | |
71 | ||
72 | static bfd_reloc_status_type | |
73 | coff_thumb_pcrel_9 PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
74 | asection *, bfd *, char **)); | |
75 | ||
76 | static bfd_reloc_status_type | |
77 | coff_arm_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, | |
78 | char **)); | |
943fbd5b | 79 | |
e1aeb285 NC |
80 | static boolean |
81 | coff_arm_adjust_symndx PARAMS ((bfd *, struct bfd_link_info *, bfd *, | |
82 | asection *, struct internal_reloc *, | |
83 | boolean *)); | |
84 | ||
85 | /* The linker script knows the section names for placement. | |
86 | The entry_names are used to do simple name mangling on the stubs. | |
87 | Given a function name, and its type, the stub can be found. The | |
88 | name can be changed. The only requirement is the %s be present. | |
89 | */ | |
90 | ||
91 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" | |
92 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
93 | ||
94 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
95 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
275143eb SC |
96 | |
97 | /* Used by the assembler. */ | |
943fbd5b KR |
98 | static bfd_reloc_status_type |
99 | coff_arm_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
100 | error_message) | |
101 | bfd *abfd; | |
102 | arelent *reloc_entry; | |
103 | asymbol *symbol; | |
104 | PTR data; | |
105 | asection *input_section; | |
106 | bfd *output_bfd; | |
107 | char **error_message; | |
108 | { | |
109 | symvalue diff; | |
943fbd5b KR |
110 | if (output_bfd == (bfd *) NULL) |
111 | return bfd_reloc_continue; | |
112 | ||
da7afe3b | 113 | diff = reloc_entry->addend; |
943fbd5b KR |
114 | |
115 | #define DOIT(x) \ | |
116 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) | |
117 | ||
da7afe3b SC |
118 | if (diff != 0) |
119 | { | |
120 | reloc_howto_type *howto = reloc_entry->howto; | |
121 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
943fbd5b | 122 | |
da7afe3b | 123 | switch (howto->size) |
943fbd5b | 124 | { |
da7afe3b SC |
125 | case 0: |
126 | { | |
127 | char x = bfd_get_8 (abfd, addr); | |
128 | DOIT (x); | |
129 | bfd_put_8 (abfd, x, addr); | |
130 | } | |
131 | break; | |
132 | ||
133 | case 1: | |
134 | { | |
135 | short x = bfd_get_16 (abfd, addr); | |
136 | DOIT (x); | |
137 | bfd_put_16 (abfd, x, addr); | |
138 | } | |
139 | break; | |
140 | ||
141 | case 2: | |
142 | { | |
143 | long x = bfd_get_32 (abfd, addr); | |
144 | DOIT (x); | |
145 | bfd_put_32 (abfd, x, addr); | |
146 | } | |
147 | break; | |
148 | ||
149 | default: | |
150 | abort (); | |
943fbd5b | 151 | } |
da7afe3b | 152 | } |
943fbd5b KR |
153 | |
154 | /* Now let bfd_perform_relocation finish everything up. */ | |
155 | return bfd_reloc_continue; | |
156 | } | |
157 | ||
09888f15 | 158 | #define TARGET_UNDERSCORE '_' |
e1aeb285 | 159 | |
3ea928f5 SC |
160 | #ifndef PCRELOFFSET |
161 | #define PCRELOFFSET true | |
162 | #endif | |
163 | ||
e1aeb285 NC |
164 | /* These most certainly belong somewhere else. Just had to get rid of |
165 | the manifest constants in the code. */ | |
166 | ||
167 | #define ARM_8 0 | |
168 | #define ARM_16 1 | |
169 | #define ARM_32 2 | |
170 | #define ARM_26 3 | |
171 | #define ARM_DISP8 4 | |
172 | #define ARM_DISP16 5 | |
173 | #define ARM_DISP32 6 | |
174 | #define ARM_26D 7 | |
175 | /* 8 is unused */ | |
176 | #define ARM_NEG16 9 | |
177 | #define ARM_NEG32 10 | |
178 | #define ARM_RVA32 11 | |
179 | #define ARM_THUMB9 12 | |
180 | #define ARM_THUMB12 13 | |
181 | #define ARM_THUMB23 14 | |
182 | ||
943fbd5b KR |
183 | static reloc_howto_type aoutarm_std_reloc_howto[] = |
184 | { | |
185 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
e1aeb285 NC |
186 | HOWTO(ARM_8, /* type */ |
187 | 0, /* rightshift */ | |
943fbd5b | 188 | 0, /* size */ |
e1aeb285 NC |
189 | 8, /* bitsize */ |
190 | false, /* pc_relative */ | |
943fbd5b | 191 | 0, /* bitpos */ |
e1aeb285 NC |
192 | complain_overflow_bitfield, /* complain_on_overflow */ |
193 | coff_arm_reloc, /* special_function */ | |
194 | "ARM_8", /* name */ | |
195 | true, /* partial_inplace */ | |
196 | 0x000000ff, /* src_mask */ | |
197 | 0x000000ff, /* dst_mask */ | |
198 | PCRELOFFSET /* pcrel_offset */), | |
199 | HOWTO(ARM_16, | |
943fbd5b KR |
200 | 0, |
201 | 1, | |
202 | 16, | |
203 | false, | |
204 | 0, | |
205 | complain_overflow_bitfield, | |
206 | coff_arm_reloc, | |
e1aeb285 | 207 | "ARM_16", |
943fbd5b KR |
208 | true, |
209 | 0x0000ffff, | |
210 | 0x0000ffff, | |
211 | PCRELOFFSET), | |
e1aeb285 | 212 | HOWTO(ARM_32, |
943fbd5b KR |
213 | 0, |
214 | 2, | |
215 | 32, | |
216 | false, | |
217 | 0, | |
218 | complain_overflow_bitfield, | |
219 | coff_arm_reloc, | |
e1aeb285 | 220 | "ARM_32", |
943fbd5b KR |
221 | true, |
222 | 0xffffffff, | |
223 | 0xffffffff, | |
224 | PCRELOFFSET), | |
e1aeb285 | 225 | HOWTO(ARM_26, |
943fbd5b | 226 | 2, |
3ea928f5 | 227 | 2, |
454515c0 | 228 | 24, |
943fbd5b KR |
229 | true, |
230 | 0, | |
231 | complain_overflow_signed, | |
232 | aoutarm_fix_pcrel_26 , | |
e1aeb285 | 233 | "ARM_26", |
275143eb | 234 | false, |
943fbd5b KR |
235 | 0x00ffffff, |
236 | 0x00ffffff, | |
237 | PCRELOFFSET), | |
e1aeb285 | 238 | HOWTO(ARM_DISP8, |
943fbd5b KR |
239 | 0, |
240 | 0, | |
241 | 8, | |
242 | true, | |
243 | 0, | |
244 | complain_overflow_signed, | |
245 | coff_arm_reloc, | |
e1aeb285 | 246 | "ARM_DISP8", |
943fbd5b KR |
247 | true, |
248 | 0x000000ff, | |
249 | 0x000000ff, | |
250 | true), | |
e1aeb285 | 251 | HOWTO( ARM_DISP16, |
943fbd5b KR |
252 | 0, |
253 | 1, | |
254 | 16, | |
255 | true, | |
256 | 0, | |
257 | complain_overflow_signed, | |
258 | coff_arm_reloc, | |
e1aeb285 | 259 | "ARM_DISP16", |
943fbd5b KR |
260 | true, |
261 | 0x0000ffff, | |
262 | 0x0000ffff, | |
263 | true), | |
e1aeb285 | 264 | HOWTO( ARM_DISP32, |
943fbd5b KR |
265 | 0, |
266 | 2, | |
267 | 32, | |
268 | true, | |
269 | 0, | |
270 | complain_overflow_signed, | |
271 | coff_arm_reloc, | |
e1aeb285 | 272 | "ARM_DISP32", |
943fbd5b KR |
273 | true, |
274 | 0xffffffff, | |
275 | 0xffffffff, | |
276 | true), | |
e1aeb285 | 277 | HOWTO( ARM_26D, |
943fbd5b | 278 | 2, |
3ea928f5 | 279 | 2, |
454515c0 | 280 | 24, |
943fbd5b KR |
281 | false, |
282 | 0, | |
283 | complain_overflow_signed, | |
284 | aoutarm_fix_pcrel_26_done, | |
e1aeb285 | 285 | "ARM_26D", |
943fbd5b KR |
286 | true, |
287 | 0x00ffffff, | |
46686c78 | 288 | 0x0, |
943fbd5b | 289 | false), |
e1aeb285 | 290 | /* 8 is unused */ |
943fbd5b | 291 | {-1}, |
e1aeb285 | 292 | HOWTO( ARM_NEG16, |
943fbd5b KR |
293 | 0, |
294 | -1, | |
295 | 16, | |
296 | false, | |
297 | 0, | |
298 | complain_overflow_bitfield, | |
299 | coff_arm_reloc, | |
e1aeb285 | 300 | "ARM_NEG16", |
943fbd5b KR |
301 | true, |
302 | 0x0000ffff, | |
303 | 0x0000ffff, | |
304 | false), | |
e1aeb285 | 305 | HOWTO( ARM_NEG32, |
943fbd5b KR |
306 | 0, |
307 | -2, | |
308 | 32, | |
309 | false, | |
310 | 0, | |
311 | complain_overflow_bitfield, | |
312 | coff_arm_reloc, | |
e1aeb285 | 313 | "ARM_NEG32", |
943fbd5b KR |
314 | true, |
315 | 0xffffffff, | |
316 | 0xffffffff, | |
3ea928f5 | 317 | false), |
e1aeb285 | 318 | HOWTO( ARM_RVA32, |
3ea928f5 SC |
319 | 0, |
320 | 2, | |
321 | 32, | |
322 | false, | |
323 | 0, | |
324 | complain_overflow_bitfield, | |
325 | coff_arm_reloc, | |
e1aeb285 | 326 | "ARM_RVA32", |
3ea928f5 SC |
327 | true, |
328 | 0xffffffff, | |
329 | 0xffffffff, | |
330 | PCRELOFFSET), | |
e1aeb285 NC |
331 | HOWTO( ARM_THUMB9, |
332 | 1, | |
333 | 1, | |
454515c0 | 334 | 8, |
e1aeb285 NC |
335 | true, |
336 | 0, | |
337 | complain_overflow_signed, | |
338 | coff_thumb_pcrel_9 , | |
339 | "ARM_THUMB9", | |
340 | false, | |
341 | 0x000000ff, | |
342 | 0x000000ff, | |
343 | PCRELOFFSET), | |
344 | HOWTO( ARM_THUMB12, | |
345 | 1, | |
346 | 1, | |
454515c0 | 347 | 11, |
e1aeb285 NC |
348 | true, |
349 | 0, | |
350 | complain_overflow_signed, | |
351 | coff_thumb_pcrel_12 , | |
352 | "ARM_THUMB12", | |
353 | false, | |
354 | 0x000007ff, | |
355 | 0x000007ff, | |
356 | PCRELOFFSET), | |
357 | HOWTO( ARM_THUMB23, | |
358 | 1, | |
359 | 2, | |
454515c0 | 360 | 22, |
e1aeb285 NC |
361 | true, |
362 | 0, | |
363 | complain_overflow_signed, | |
364 | coff_thumb_pcrel_23 , | |
365 | "ARM_THUMB23", | |
366 | false, | |
367 | 0x07ff07ff, | |
368 | 0x07ff07ff, | |
369 | PCRELOFFSET), | |
943fbd5b | 370 | }; |
7d6d10f9 | 371 | |
177b1932 DE |
372 | #ifdef COFF_WITH_PE |
373 | /* Return true if this relocation should | |
374 | appear in the output .reloc section. */ | |
375 | ||
7d6d10f9 NC |
376 | static boolean |
377 | in_reloc_p (abfd, howto) | |
177b1932 | 378 | bfd * abfd; |
7d6d10f9 | 379 | reloc_howto_type * howto; |
177b1932 | 380 | { |
7d6d10f9 | 381 | return !howto->pc_relative && howto->type != ARM_RVA32; |
177b1932 DE |
382 | } |
383 | #endif | |
943fbd5b KR |
384 | |
385 | ||
943fbd5b KR |
386 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
387 | (cache_ptr)->howto = aoutarm_std_reloc_howto + (dst)->r_type; | |
388 | ||
275143eb | 389 | #define coff_rtype_to_howto coff_arm_rtype_to_howto |
a5655244 | 390 | |
275143eb SC |
391 | static reloc_howto_type * |
392 | coff_arm_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
393 | bfd *abfd; | |
394 | asection *sec; | |
395 | struct internal_reloc *rel; | |
396 | struct coff_link_hash_entry *h; | |
397 | struct internal_syment *sym; | |
398 | bfd_vma *addendp; | |
399 | { | |
400 | reloc_howto_type *howto; | |
401 | ||
402 | howto = aoutarm_std_reloc_howto + rel->r_type; | |
403 | ||
e1aeb285 | 404 | if (rel->r_type == ARM_RVA32) |
275143eb | 405 | { |
a5655244 | 406 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; |
275143eb | 407 | } |
46686c78 NC |
408 | |
409 | /* The relocation_section function will skip pcrel_offset relocs | |
410 | when doing a relocateable link. However, we want to convert | |
411 | ARM26 to ARM26D relocs if possible. We return a fake howto in | |
412 | this case without pcrel_offset set, and adjust the addend to | |
413 | compensate. */ | |
e1aeb285 | 414 | if (rel->r_type == ARM_26 |
46686c78 NC |
415 | && h != NULL |
416 | && (h->root.type == bfd_link_hash_defined | |
417 | || h->root.type == bfd_link_hash_defweak) | |
418 | && h->root.u.def.section->output_section == sec->output_section) | |
419 | { | |
420 | static reloc_howto_type fake_arm26_reloc = | |
e1aeb285 | 421 | HOWTO (ARM_26, |
46686c78 NC |
422 | 2, |
423 | 2, | |
454515c0 | 424 | 24, |
46686c78 NC |
425 | true, |
426 | 0, | |
427 | complain_overflow_signed, | |
428 | aoutarm_fix_pcrel_26 , | |
e1aeb285 | 429 | "ARM_26", |
46686c78 NC |
430 | false, |
431 | 0x00ffffff, | |
432 | 0x00ffffff, | |
433 | false); | |
434 | ||
435 | *addendp -= rel->r_vaddr - sec->vma; | |
e1aeb285 | 436 | return & fake_arm26_reloc; |
46686c78 NC |
437 | } |
438 | ||
275143eb SC |
439 | return howto; |
440 | ||
441 | } | |
442 | /* Used by the assembler. */ | |
443 | ||
943fbd5b KR |
444 | static bfd_reloc_status_type |
445 | aoutarm_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section, | |
446 | output_bfd, error_message) | |
447 | bfd *abfd; | |
448 | arelent *reloc_entry; | |
449 | asymbol *symbol; | |
450 | PTR data; | |
451 | asection *input_section; | |
452 | bfd *output_bfd; | |
453 | char **error_message; | |
454 | { | |
455 | /* This is dead simple at present. */ | |
456 | return bfd_reloc_ok; | |
457 | } | |
458 | ||
275143eb SC |
459 | /* Used by the assembler. */ |
460 | ||
943fbd5b KR |
461 | static bfd_reloc_status_type |
462 | aoutarm_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section, | |
463 | output_bfd, error_message) | |
464 | bfd *abfd; | |
465 | arelent *reloc_entry; | |
466 | asymbol *symbol; | |
467 | PTR data; | |
468 | asection *input_section; | |
469 | bfd *output_bfd; | |
470 | char **error_message; | |
471 | { | |
472 | bfd_vma relocation; | |
473 | bfd_size_type addr = reloc_entry->address; | |
474 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
475 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
476 | ||
477 | /* If this is an undefined symbol, return error */ | |
478 | if (symbol->section == &bfd_und_section | |
479 | && (symbol->flags & BSF_WEAK) == 0) | |
480 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
481 | ||
482 | /* If the sections are different, and we are doing a partial relocation, | |
483 | just ignore it for now. */ | |
484 | if (symbol->section->name != input_section->name | |
485 | && output_bfd != (bfd *)NULL) | |
486 | return bfd_reloc_continue; | |
487 | ||
488 | relocation = (target & 0x00ffffff) << 2; | |
489 | relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */ | |
490 | relocation += symbol->value; | |
491 | relocation += symbol->section->output_section->vma; | |
492 | relocation += symbol->section->output_offset; | |
493 | relocation += reloc_entry->addend; | |
494 | relocation -= input_section->output_section->vma; | |
495 | relocation -= input_section->output_offset; | |
496 | relocation -= addr; | |
e1aeb285 | 497 | |
943fbd5b KR |
498 | if (relocation & 3) |
499 | return bfd_reloc_overflow; | |
500 | ||
501 | /* Check for overflow */ | |
502 | if (relocation & 0x02000000) | |
503 | { | |
f6727b90 | 504 | if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff) |
943fbd5b KR |
505 | flag = bfd_reloc_overflow; |
506 | } | |
507 | else if (relocation & ~0x03ffffff) | |
508 | flag = bfd_reloc_overflow; | |
509 | ||
510 | target &= ~0x00ffffff; | |
511 | target |= (relocation >> 2) & 0x00ffffff; | |
512 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); | |
513 | ||
514 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
515 | Strictly this is only necessary if we are doing a partial relocation. */ | |
e1aeb285 NC |
516 | reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D]; |
517 | ||
518 | return flag; | |
519 | } | |
520 | ||
521 | typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype; | |
522 | ||
523 | static bfd_reloc_status_type | |
524 | coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, input_section, | |
525 | output_bfd, error_message, btype) | |
526 | bfd *abfd; | |
527 | arelent *reloc_entry; | |
528 | asymbol *symbol; | |
529 | PTR data; | |
530 | asection *input_section; | |
531 | bfd *output_bfd; | |
532 | char **error_message; | |
533 | thumb_pcrel_branchtype btype; | |
534 | { | |
f6727b90 | 535 | bfd_vma relocation = 0; |
e1aeb285 NC |
536 | bfd_size_type addr = reloc_entry->address; |
537 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
538 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
539 | bfd_vma dstmsk; | |
540 | bfd_vma offmsk; | |
541 | bfd_vma signbit; | |
542 | ||
543 | /* NOTE: This routine is currently used by GAS, but not by the link | |
544 | phase. */ | |
545 | ||
546 | switch (btype) | |
547 | { | |
548 | case b9: | |
549 | dstmsk = 0x000000ff; | |
550 | offmsk = 0x000001fe; | |
551 | signbit = 0x00000100; | |
552 | break; | |
553 | ||
554 | case b12: | |
555 | dstmsk = 0x000007ff; | |
556 | offmsk = 0x00000ffe; | |
557 | signbit = 0x00000800; | |
558 | break; | |
559 | ||
560 | case b23: | |
561 | dstmsk = 0x07ff07ff; | |
562 | offmsk = 0x007fffff; | |
563 | signbit = 0x00400000; | |
564 | break; | |
565 | ||
566 | default: | |
567 | abort (); | |
568 | } | |
569 | ||
570 | /* If this is an undefined symbol, return error */ | |
571 | if (symbol->section == &bfd_und_section | |
572 | && (symbol->flags & BSF_WEAK) == 0) | |
573 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
574 | ||
575 | /* If the sections are different, and we are doing a partial relocation, | |
576 | just ignore it for now. */ | |
577 | if (symbol->section->name != input_section->name | |
578 | && output_bfd != (bfd *)NULL) | |
579 | return bfd_reloc_continue; | |
580 | ||
581 | switch (btype) | |
582 | { | |
583 | case b9: | |
584 | case b12: | |
585 | relocation = ((target & dstmsk) << 1); | |
586 | break; | |
587 | ||
588 | case b23: | |
589 | if (bfd_big_endian (abfd)) | |
590 | relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4); | |
591 | else | |
592 | relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15); | |
593 | break; | |
f6727b90 ILT |
594 | |
595 | default: | |
596 | abort (); | |
e1aeb285 NC |
597 | } |
598 | ||
599 | relocation = (relocation ^ signbit) - signbit; /* Sign extend */ | |
600 | relocation += symbol->value; | |
601 | relocation += symbol->section->output_section->vma; | |
602 | relocation += symbol->section->output_offset; | |
603 | relocation += reloc_entry->addend; | |
604 | relocation -= input_section->output_section->vma; | |
605 | relocation -= input_section->output_offset; | |
606 | relocation -= addr; | |
607 | ||
608 | if (relocation & 1) | |
609 | return bfd_reloc_overflow; | |
610 | ||
611 | /* Check for overflow */ | |
612 | if (relocation & signbit) | |
613 | { | |
614 | if ((relocation & ~offmsk) != ~offmsk) | |
615 | flag = bfd_reloc_overflow; | |
616 | } | |
617 | else if (relocation & ~offmsk) | |
618 | flag = bfd_reloc_overflow; | |
619 | ||
620 | target &= ~dstmsk; | |
621 | switch (btype) | |
622 | { | |
623 | case b9: | |
624 | case b12: | |
625 | target |= (relocation >> 1); | |
626 | break; | |
627 | ||
628 | case b23: | |
629 | if (bfd_big_endian (abfd)) | |
630 | target |= ((relocation & 0xfff) >> 1) | ((relocation << 4) & 0x07ff0000); | |
631 | else | |
632 | target |= ((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff); | |
633 | break; | |
f6727b90 ILT |
634 | |
635 | default: | |
636 | abort (); | |
e1aeb285 | 637 | } |
275143eb | 638 | |
e1aeb285 NC |
639 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); |
640 | ||
641 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
642 | Strictly this is only necessary if we are doing a partial relocation. */ | |
643 | reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D]; | |
644 | ||
645 | /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations */ | |
943fbd5b KR |
646 | return flag; |
647 | } | |
648 | ||
e1aeb285 NC |
649 | static bfd_reloc_status_type |
650 | coff_thumb_pcrel_23 (abfd, reloc_entry, symbol, data, input_section, | |
651 | output_bfd, error_message) | |
652 | bfd *abfd; | |
653 | arelent *reloc_entry; | |
654 | asymbol *symbol; | |
655 | PTR data; | |
656 | asection *input_section; | |
657 | bfd *output_bfd; | |
658 | char **error_message; | |
659 | { | |
660 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
661 | input_section, output_bfd, error_message, b23); | |
662 | } | |
663 | ||
664 | static bfd_reloc_status_type | |
665 | coff_thumb_pcrel_12 (abfd, reloc_entry, symbol, data, input_section, | |
666 | output_bfd, error_message) | |
667 | bfd *abfd; | |
668 | arelent *reloc_entry; | |
669 | asymbol *symbol; | |
670 | PTR data; | |
671 | asection *input_section; | |
672 | bfd *output_bfd; | |
673 | char **error_message; | |
674 | { | |
675 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
676 | input_section, output_bfd, error_message, b12); | |
677 | } | |
678 | ||
679 | static bfd_reloc_status_type | |
680 | coff_thumb_pcrel_9 (abfd, reloc_entry, symbol, data, input_section, | |
681 | output_bfd, error_message) | |
682 | bfd *abfd; | |
683 | arelent *reloc_entry; | |
684 | asymbol *symbol; | |
685 | PTR data; | |
686 | asection *input_section; | |
687 | bfd *output_bfd; | |
688 | char **error_message; | |
689 | { | |
690 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
691 | input_section, output_bfd, error_message, b9); | |
692 | } | |
693 | ||
275143eb | 694 | |
943fbd5b | 695 | static CONST struct reloc_howto_struct * |
7d6d10f9 NC |
696 | coff_arm_reloc_type_lookup (abfd, code) |
697 | bfd * abfd; | |
943fbd5b KR |
698 | bfd_reloc_code_real_type code; |
699 | { | |
700 | #define ASTD(i,j) case i: return &aoutarm_std_reloc_howto[j] | |
701 | if (code == BFD_RELOC_CTOR) | |
702 | switch (bfd_get_arch_info (abfd)->bits_per_address) | |
703 | { | |
704 | case 32: | |
705 | code = BFD_RELOC_32; | |
706 | break; | |
707 | default: return (CONST struct reloc_howto_struct *) 0; | |
708 | } | |
709 | ||
710 | switch (code) | |
711 | { | |
e1aeb285 NC |
712 | ASTD (BFD_RELOC_8, ARM_8); |
713 | ASTD (BFD_RELOC_16, ARM_16); | |
714 | ASTD (BFD_RELOC_32, ARM_32); | |
715 | ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26); | |
716 | ASTD (BFD_RELOC_8_PCREL, ARM_DISP8); | |
717 | ASTD (BFD_RELOC_16_PCREL, ARM_DISP16); | |
718 | ASTD (BFD_RELOC_32_PCREL, ARM_DISP32); | |
719 | ASTD (BFD_RELOC_RVA, ARM_RVA32); | |
720 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9); | |
721 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12); | |
722 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23); | |
943fbd5b KR |
723 | default: return (CONST struct reloc_howto_struct *) 0; |
724 | } | |
725 | } | |
726 | ||
943fbd5b | 727 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
943fbd5b | 728 | #define COFF_PAGE_SIZE 0x1000 |
943fbd5b KR |
729 | /* Turn a howto into a reloc nunmber */ |
730 | ||
731 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
732 | #define BADMAG(x) ARMBADMAG(x) | |
733 | #define ARM 1 /* Customize coffcode.h */ | |
734 | ||
7d6d10f9 NC |
735 | /* Extend the coff_link_hash_table structure with a few ARM specific fields. |
736 | This allows us to store global data here without actually creating any | |
737 | global variables, which is a no-no in the BFD world. */ | |
738 | struct coff_arm_link_hash_table | |
739 | { | |
740 | /* The original coff_link_hash_table structure. MUST be first field. */ | |
741 | struct coff_link_hash_table root; | |
742 | ||
743 | /* The size in bytes of the section containg the Thumb-to-ARM glue. */ | |
744 | long int thumb_glue_size; | |
745 | ||
746 | /* The size in bytes of the section containg the ARM-to-Thumb glue. */ | |
747 | long int arm_glue_size; | |
38c574bb | 748 | |
7d6d10f9 NC |
749 | /* An arbitary input BFD chosen to hold the glue sections. */ |
750 | bfd * bfd_of_glue_owner; | |
751 | }; | |
e1aeb285 | 752 | |
7d6d10f9 NC |
753 | /* Get the ARM coff linker hash table from a link_info structure. */ |
754 | #define coff_arm_hash_table(info) \ | |
755 | ((struct coff_arm_link_hash_table *) ((info)->hash)) | |
756 | ||
757 | /* Create an ARM coff linker hash table. */ | |
758 | ||
759 | static struct bfd_link_hash_table * | |
760 | coff_arm_link_hash_table_create (abfd) | |
761 | bfd * abfd; | |
762 | { | |
763 | struct coff_arm_link_hash_table * ret; | |
764 | ||
765 | ret = ((struct coff_arm_link_hash_table *) | |
766 | bfd_alloc (abfd, sizeof (struct coff_arm_link_hash_table))); | |
767 | if (ret == (struct coff_arm_link_hash_table *) NULL) | |
768 | return NULL; | |
769 | ||
770 | if (! _bfd_coff_link_hash_table_init | |
771 | (& ret->root, abfd, _bfd_coff_link_hash_newfunc)) | |
772 | { | |
773 | bfd_release (abfd, ret); | |
774 | return (struct bfd_link_hash_table *) NULL; | |
775 | } | |
776 | ||
777 | ret->thumb_glue_size = 0; | |
778 | ret->arm_glue_size = 0; | |
779 | ret->bfd_of_glue_owner = NULL; | |
780 | ||
781 | return & ret->root.root; | |
782 | } | |
e1aeb285 NC |
783 | |
784 | /* some typedefs for holding instructions */ | |
785 | typedef unsigned long int insn32; | |
786 | typedef unsigned short int insn16; | |
787 | ||
788 | \f | |
789 | /* The thumb form of a long branch is a bit finicky, because the offset | |
790 | encoding is split over two fields, each in it's own instruction. They | |
791 | can occur in any order. So given a thumb form of long branch, and an | |
792 | offset, insert the offset into the thumb branch and return finished | |
793 | instruction. | |
794 | ||
795 | It takes two thumb instructions to encode the target address. Each has | |
796 | 11 bits to invest. The upper 11 bits are stored in one (identifed by | |
797 | H-0.. see below), the lower 11 bits are stored in the other (identified | |
798 | by H-1). | |
799 | ||
800 | Combine together and shifted left by 1 (it's a half word address) and | |
801 | there you have it. | |
802 | ||
803 | Op: 1111 = F, | |
804 | H-0, upper address-0 = 000 | |
805 | Op: 1111 = F, | |
806 | H-1, lower address-0 = 800 | |
807 | ||
808 | They can be ordered either way, but the arm tools I've seen always put | |
809 | the lower one first. It probably doesn't matter. krk@cygnus.com | |
810 | ||
811 | XXX: Actually the order does matter. The second instruction (H-1) | |
812 | moves the computed address into the PC, so it must be the second one | |
813 | in the sequence. The problem, however is that whilst little endian code | |
814 | stores the instructions in HI then LOW order, big endian code does the | |
815 | reverse. nickc@cygnus.com */ | |
816 | ||
817 | #define LOW_HI_ORDER 0xF800F000 | |
818 | #define HI_LOW_ORDER 0xF000F800 | |
819 | ||
820 | static insn32 | |
821 | insert_thumb_branch (br_insn, rel_off) | |
822 | insn32 br_insn; | |
823 | int rel_off; | |
824 | { | |
825 | unsigned int low_bits; | |
826 | unsigned int high_bits; | |
943fbd5b | 827 | |
46686c78 | 828 | |
e1aeb285 | 829 | BFD_ASSERT((rel_off & 1) != 1); |
46686c78 | 830 | |
e1aeb285 NC |
831 | rel_off >>= 1; /* half word aligned address */ |
832 | low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */ | |
7d6d10f9 | 833 | high_bits = (rel_off >> 11) & 0x000007FF; /* the top 11 bits */ |
46686c78 | 834 | |
e1aeb285 NC |
835 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) |
836 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
837 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
838 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
839 | else | |
840 | abort(); /* error - not a valid branch instruction form */ | |
46686c78 | 841 | |
e1aeb285 | 842 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
46686c78 | 843 | |
e1aeb285 NC |
844 | return br_insn; |
845 | } | |
46686c78 | 846 | |
e1aeb285 NC |
847 | \f |
848 | static struct coff_link_hash_entry * | |
849 | find_thumb_glue (info, name, input_bfd) | |
850 | struct bfd_link_info * info; | |
851 | char * name; | |
852 | bfd * input_bfd; | |
46686c78 | 853 | { |
7d6d10f9 NC |
854 | char * tmp_name; |
855 | struct coff_link_hash_entry * myh; | |
46686c78 | 856 | |
e1aeb285 NC |
857 | tmp_name = ((char *) |
858 | bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME))); | |
46686c78 | 859 | |
e1aeb285 | 860 | BFD_ASSERT (tmp_name); |
46686c78 | 861 | |
e1aeb285 NC |
862 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); |
863 | ||
7d6d10f9 NC |
864 | myh = coff_link_hash_lookup |
865 | (coff_hash_table (info), tmp_name, false, false, true); | |
866 | ||
e1aeb285 | 867 | if (myh == NULL) |
7d6d10f9 NC |
868 | _bfd_error_handler ("%s: unable to find THUMB glue '%s' for `%s'", |
869 | bfd_get_filename (input_bfd), tmp_name, name); | |
46686c78 | 870 | |
e1aeb285 | 871 | free (tmp_name); |
46686c78 | 872 | |
e1aeb285 | 873 | return myh; |
46686c78 NC |
874 | } |
875 | ||
e1aeb285 NC |
876 | static struct coff_link_hash_entry * |
877 | find_arm_glue (info, name, input_bfd) | |
878 | struct bfd_link_info * info; | |
879 | char * name; | |
880 | bfd * input_bfd; | |
46686c78 | 881 | { |
7d6d10f9 NC |
882 | char * tmp_name; |
883 | struct coff_link_hash_entry * myh; | |
315dc1f4 | 884 | |
e1aeb285 NC |
885 | tmp_name = ((char *) |
886 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME))); | |
46686c78 | 887 | |
e1aeb285 | 888 | BFD_ASSERT (tmp_name); |
46686c78 | 889 | |
e1aeb285 NC |
890 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); |
891 | ||
7d6d10f9 NC |
892 | myh = coff_link_hash_lookup |
893 | (coff_hash_table (info), tmp_name, false, false, true); | |
46686c78 | 894 | |
e1aeb285 | 895 | if (myh == NULL) |
7d6d10f9 NC |
896 | _bfd_error_handler ("%s: unable to find ARM glue '%s' for `%s'", |
897 | bfd_get_filename (input_bfd), tmp_name, name); | |
46686c78 | 898 | |
e1aeb285 | 899 | free (tmp_name); |
46686c78 | 900 | |
e1aeb285 NC |
901 | return myh; |
902 | } | |
46686c78 | 903 | |
e1aeb285 NC |
904 | /* |
905 | ARM->Thumb glue: | |
906 | ||
907 | .arm | |
908 | __func_from_arm: | |
909 | ldr r12, __func_addr | |
910 | bx r12 | |
911 | __func_addr: | |
912 | .word func @ behave as if you saw a ARM_32 reloc | |
913 | ||
914 | ldr ip,8 <__func_addr> e59fc000 | |
915 | bx ip e12fff1c | |
916 | .word func 00000001 | |
917 | ||
918 | */ | |
919 | ||
920 | #define ARM2THUMB_GLUE_SIZE 12 | |
454515c0 | 921 | static const insn32 |
7d6d10f9 NC |
922 | a2t1_ldr_insn = 0xe59fc000, |
923 | a2t2_bx_r12_insn = 0xe12fff1c, | |
e1aeb285 NC |
924 | a2t3_func_addr_insn = 0x00000001; |
925 | ||
926 | /* | |
927 | Thumb->ARM: | |
928 | ||
929 | .thumb | |
930 | .align 2 | |
931 | __func_from_thumb: | |
932 | bx pc | |
933 | nop | |
934 | .arm | |
935 | __func_change_to_arm: | |
936 | b func | |
937 | ||
938 | ||
939 | bx pc 4778 | |
940 | nop 0000 | |
941 | b func eafffffe | |
942 | ||
943 | */ | |
944 | ||
945 | #define THUMB2ARM_GLUE_SIZE 8 | |
454515c0 | 946 | static const insn16 |
e1aeb285 NC |
947 | t2a1_bx_pc_insn = 0x4778, |
948 | t2a2_noop_insn = 0x46c0; | |
454515c0 | 949 | static const insn32 |
e1aeb285 NC |
950 | t2a3_b_insn = 0xea000000; |
951 | ||
952 | /* TODO: | |
953 | We should really create new local (static) symbols in destination | |
954 | object for each stub we create. We should also create local | |
955 | (static) symbols within the stubs when switching between ARM and | |
956 | Thumb code. This will ensure that the debugger and disassembler | |
957 | can present a better view of stubs. | |
958 | ||
959 | We can treat stubs like literal sections, and for the THUMB9 ones | |
960 | (short addressing range) we should be able to insert the stubs | |
961 | between sections. i.e. the simplest approach (since relocations | |
962 | are done on a section basis) is to dump the stubs at the end of | |
963 | processing a section. That way we can always try and minimise the | |
964 | offset to and from a stub. However, this does not map well onto | |
965 | the way that the linker/BFD does its work: mapping all input | |
966 | sections to output sections via the linker script before doing | |
967 | all the processing. | |
968 | ||
969 | Unfortunately it may be easier to just to disallow short range | |
970 | Thumb->ARM stubs (i.e. no conditional inter-working branches, | |
971 | only branch-and-link (BL) calls. This will simplify the processing | |
972 | since we can then put all of the stubs into their own section. | |
973 | ||
974 | TODO: | |
975 | On a different subject, rather than complaining when a | |
976 | branch cannot fit in the number of bits available for the | |
977 | instruction we should generate a trampoline stub (needed to | |
978 | address the complete 32bit address space). */ | |
979 | ||
980 | /* The standard COFF backend linker does not cope with the special | |
981 | Thumb BRANCH23 relocation. The alternative would be to split the | |
982 | BRANCH23 into seperate HI23 and LO23 relocations. However, it is a | |
983 | bit simpler simply providing our own relocation driver. */ | |
984 | ||
985 | /* The reloc processing routine for the ARM/Thumb COFF linker. NOTE: | |
986 | This code is a very slightly modified copy of | |
987 | _bfd_coff_generic_relocate_section. It would be a much more | |
988 | maintainable solution to have a MACRO that could be expanded within | |
989 | _bfd_coff_generic_relocate_section that would only be provided for | |
990 | ARM/Thumb builds. It is only the code marked THUMBEXTENSION that | |
991 | is different from the original. */ | |
46686c78 | 992 | |
315dc1f4 | 993 | static boolean |
e1aeb285 NC |
994 | coff_arm_relocate_section (output_bfd, info, input_bfd, input_section, |
995 | contents, relocs, syms, sections) | |
996 | bfd *output_bfd; | |
997 | struct bfd_link_info *info; | |
998 | bfd *input_bfd; | |
999 | asection *input_section; | |
1000 | bfd_byte *contents; | |
1001 | struct internal_reloc *relocs; | |
1002 | struct internal_syment *syms; | |
1003 | asection **sections; | |
46686c78 | 1004 | { |
8e2eebc8 ILT |
1005 | struct internal_reloc * rel; |
1006 | struct internal_reloc * relend; | |
46686c78 | 1007 | |
e1aeb285 NC |
1008 | rel = relocs; |
1009 | relend = rel + input_section->reloc_count; | |
46686c78 | 1010 | |
e1aeb285 | 1011 | for (; rel < relend; rel++) |
46686c78 | 1012 | { |
e1aeb285 NC |
1013 | int done = 0; |
1014 | long symndx; | |
1015 | struct coff_link_hash_entry *h; | |
1016 | struct internal_syment *sym; | |
1017 | bfd_vma addend; | |
1018 | bfd_vma val; | |
1019 | reloc_howto_type *howto; | |
1020 | bfd_reloc_status_type rstat; | |
1021 | bfd_vma h_val; | |
1022 | ||
1023 | symndx = rel->r_symndx; | |
1024 | ||
1025 | if (symndx == -1) | |
46686c78 | 1026 | { |
e1aeb285 NC |
1027 | h = NULL; |
1028 | sym = NULL; | |
46686c78 NC |
1029 | } |
1030 | else | |
e1aeb285 NC |
1031 | { |
1032 | h = obj_coff_sym_hashes (input_bfd)[symndx]; | |
1033 | sym = syms + symndx; | |
1034 | } | |
46686c78 | 1035 | |
e1aeb285 NC |
1036 | /* COFF treats common symbols in one of two ways. Either the |
1037 | size of the symbol is included in the section contents, or it | |
1038 | is not. We assume that the size is not included, and force | |
1039 | the rtype_to_howto function to adjust the addend as needed. */ | |
46686c78 | 1040 | |
e1aeb285 NC |
1041 | if (sym != NULL && sym->n_scnum != 0) |
1042 | addend = - sym->n_value; | |
1043 | else | |
1044 | addend = 0; | |
1045 | ||
1046 | ||
1047 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, | |
1048 | sym, &addend); | |
1049 | if (howto == NULL) | |
1050 | return false; | |
1051 | ||
1052 | /* If we are doing a relocateable link, then we can just ignore | |
1053 | a PC relative reloc that is pcrel_offset. It will already | |
1054 | have the correct value. If this is not a relocateable link, | |
1055 | then we should ignore the symbol value. */ | |
1056 | if (howto->pc_relative && howto->pcrel_offset) | |
1057 | { | |
1058 | if (info->relocateable) | |
1059 | continue; | |
1060 | if (sym != NULL && sym->n_scnum != 0) | |
1061 | addend += sym->n_value; | |
1062 | } | |
1063 | ||
1064 | /* If we are doing a relocateable link, then we can just ignore | |
1065 | a PC relative reloc that is pcrel_offset. It will already | |
1066 | have the correct value. */ | |
1067 | if (info->relocateable | |
1068 | && howto->pc_relative | |
1069 | && howto->pcrel_offset) | |
1070 | continue; | |
1071 | ||
1072 | val = 0; | |
1073 | ||
1074 | if (h == NULL) | |
1075 | { | |
1076 | asection *sec; | |
46686c78 | 1077 | |
e1aeb285 NC |
1078 | if (symndx == -1) |
1079 | { | |
1080 | sec = bfd_abs_section_ptr; | |
1081 | val = 0; | |
1082 | } | |
1083 | else | |
1084 | { | |
1085 | sec = sections[symndx]; | |
1086 | val = (sec->output_section->vma | |
1087 | + sec->output_offset | |
1088 | + sym->n_value | |
1089 | - sec->vma); | |
1090 | } | |
1091 | } | |
1092 | else | |
1093 | { | |
1094 | #if 1 /* THUMBEXTENSION */ | |
1095 | /* We don't output the stubs if we are generating a | |
1096 | relocatable output file, since we may as well leave the | |
1097 | stub generation to the final linker pass. If we fail to | |
1098 | verify that the name is defined, we'll try to build stubs | |
1099 | for an undefined name... */ | |
1100 | if (! info->relocateable | |
1101 | && ( h->root.type == bfd_link_hash_defined | |
1102 | || h->root.type == bfd_link_hash_defweak)) | |
1103 | { | |
e1aeb285 NC |
1104 | asection * h_sec = h->root.u.def.section; |
1105 | const char * name = h->root.root.string; | |
1106 | ||
1107 | /* h locates the symbol referenced in the reloc. */ | |
1108 | h_val = (h->root.u.def.value | |
1109 | + h_sec->output_section->vma | |
1110 | + h_sec->output_offset); | |
1111 | ||
1112 | if (howto->type == ARM_26) | |
1113 | { | |
1114 | if ( h->class == C_THUMBSTATFUNC | |
1115 | || h->class == C_THUMBEXTFUNC) | |
1116 | { | |
1117 | /* Arm code calling a Thumb function */ | |
7d6d10f9 NC |
1118 | unsigned long int tmp; |
1119 | long int my_offset; | |
1120 | asection * s; | |
1121 | long int ret_offset; | |
1122 | struct coff_link_hash_entry * myh; | |
1123 | struct coff_arm_link_hash_table * globals; | |
1124 | ||
e1aeb285 NC |
1125 | myh = find_arm_glue (info, name, input_bfd); |
1126 | if (myh == NULL) | |
1127 | return false; | |
1128 | ||
7d6d10f9 | 1129 | globals = coff_arm_hash_table (info); |
e1aeb285 | 1130 | |
7d6d10f9 NC |
1131 | BFD_ASSERT (globals != NULL); |
1132 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1133 | ||
1134 | my_offset = myh->root.u.def.value; | |
1135 | ||
1136 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
e1aeb285 NC |
1137 | ARM2THUMB_GLUE_SECTION_NAME); |
1138 | BFD_ASSERT (s != NULL); | |
1139 | BFD_ASSERT (s->contents != NULL); | |
7d6d10f9 | 1140 | BFD_ASSERT (s->output_section != NULL); |
e1aeb285 NC |
1141 | |
1142 | if ((my_offset & 0x01) == 0x01) | |
1143 | { | |
8e2eebc8 ILT |
1144 | if (h_sec->owner != NULL |
1145 | && INTERWORK_SET (h_sec->owner) | |
1146 | && ! INTERWORK_FLAG (h_sec->owner)) | |
454515c0 NC |
1147 | { |
1148 | _bfd_error_handler | |
1149 | ("%s(%s): warning: interworking not enabled.", | |
1150 | bfd_get_filename (h_sec->owner), name); | |
1151 | _bfd_error_handler | |
1152 | (" first occurrence: %s: arm call to thumb", | |
1153 | bfd_get_filename (input_bfd)); | |
1154 | } | |
38c574bb | 1155 | |
e1aeb285 NC |
1156 | --my_offset; |
1157 | myh->root.u.def.value = my_offset; | |
1158 | ||
7d6d10f9 NC |
1159 | bfd_put_32 (output_bfd, a2t1_ldr_insn, |
1160 | s->contents + my_offset); | |
e1aeb285 | 1161 | |
7d6d10f9 NC |
1162 | bfd_put_32 (output_bfd, a2t2_bx_r12_insn, |
1163 | s->contents + my_offset + 4); | |
e1aeb285 NC |
1164 | |
1165 | /* It's a thumb address. Add the low order bit. */ | |
7d6d10f9 NC |
1166 | bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn, |
1167 | s->contents + my_offset + 8); | |
e1aeb285 NC |
1168 | } |
1169 | ||
7d6d10f9 | 1170 | BFD_ASSERT (my_offset <= globals->arm_glue_size); |
e1aeb285 | 1171 | |
7d6d10f9 NC |
1172 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr |
1173 | - input_section->vma); | |
e1aeb285 NC |
1174 | |
1175 | tmp = tmp & 0xFF000000; | |
7d6d10f9 | 1176 | |
e1aeb285 NC |
1177 | /* Somehow these are both 4 too far, so subtract 8. */ |
1178 | ret_offset = | |
1179 | s->output_offset | |
1180 | + my_offset | |
1181 | + s->output_section->vma | |
1182 | - (input_section->output_offset | |
1183 | + input_section->output_section->vma | |
1184 | + rel->r_vaddr) | |
1185 | - 8; | |
1186 | ||
1187 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); | |
1188 | ||
7d6d10f9 NC |
1189 | bfd_put_32 (output_bfd, tmp, contents + rel->r_vaddr |
1190 | - input_section->vma); | |
e1aeb285 NC |
1191 | |
1192 | done = 1; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12 */ | |
1197 | else if (howto->type == ARM_THUMB23) | |
1198 | { | |
1199 | if ( h->class == C_EXT | |
1200 | || h->class == C_STAT | |
1201 | || h->class == C_LABEL) | |
1202 | { | |
1203 | /* Thumb code calling an ARM function */ | |
7d6d10f9 NC |
1204 | asection * s = 0; |
1205 | long int my_offset; | |
1206 | unsigned long int tmp; | |
1207 | long int ret_offset; | |
1208 | struct coff_link_hash_entry * myh; | |
1209 | struct coff_arm_link_hash_table * globals; | |
e1aeb285 NC |
1210 | |
1211 | myh = find_thumb_glue (info, name, input_bfd); | |
1212 | if (myh == NULL) | |
1213 | return false; | |
1214 | ||
7d6d10f9 NC |
1215 | globals = coff_arm_hash_table (info); |
1216 | ||
1217 | BFD_ASSERT (globals != NULL); | |
1218 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1219 | ||
e1aeb285 NC |
1220 | my_offset = myh->root.u.def.value; |
1221 | ||
7d6d10f9 | 1222 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
e1aeb285 NC |
1223 | THUMB2ARM_GLUE_SECTION_NAME); |
1224 | ||
1225 | BFD_ASSERT (s != NULL); | |
1226 | BFD_ASSERT (s->contents != NULL); | |
7d6d10f9 | 1227 | BFD_ASSERT (s->output_section != NULL); |
e1aeb285 NC |
1228 | |
1229 | if ((my_offset & 0x01) == 0x01) | |
1230 | { | |
0f3003ef | 1231 | if (h_sec->owner != NULL |
8e2eebc8 ILT |
1232 | && INTERWORK_SET (h_sec->owner) |
1233 | && ! INTERWORK_FLAG (h_sec->owner)) | |
454515c0 NC |
1234 | { |
1235 | _bfd_error_handler | |
1236 | ("%s(%s): warning: interworking not enabled.", | |
1237 | bfd_get_filename (h_sec->owner), name); | |
1238 | _bfd_error_handler | |
1239 | (" first occurrence: %s: thumb call to arm", | |
1240 | bfd_get_filename (input_bfd)); | |
1241 | } | |
38c574bb | 1242 | |
e1aeb285 NC |
1243 | -- my_offset; |
1244 | myh->root.u.def.value = my_offset; | |
1245 | ||
1246 | bfd_put_16 (output_bfd, t2a1_bx_pc_insn, | |
1247 | s->contents + my_offset); | |
1248 | ||
1249 | bfd_put_16 (output_bfd, t2a2_noop_insn, | |
1250 | s->contents + my_offset + 2); | |
1251 | ||
1252 | ret_offset = | |
454515c0 NC |
1253 | ((signed)h_val) - /* Address of destination of the stub */ |
1254 | ((signed)(s->output_offset /* Offset from the start of the current section to the start of the stubs. */ | |
1255 | + my_offset /* Offset of the start of this stub from the start of the stubs. */ | |
1256 | + s->output_section->vma) /* Address of the start of the current section. */ | |
1257 | + 4 /* The branch instruction is 4 bytes into the stub. */ | |
1258 | + 8); /* ARM branches work from the pc of the instruction + 8. */ | |
1259 | ||
1260 | bfd_put_32 (output_bfd, | |
1261 | t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), | |
1262 | s->contents + my_offset + 4); | |
e1aeb285 NC |
1263 | } |
1264 | ||
7d6d10f9 | 1265 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); |
e1aeb285 | 1266 | |
7d6d10f9 NC |
1267 | /* Now go back and fix up the original BL insn to point |
1268 | to here. */ | |
e1aeb285 NC |
1269 | ret_offset = |
1270 | s->output_offset | |
1271 | + my_offset | |
1272 | - (input_section->output_offset | |
1273 | + rel->r_vaddr) | |
1274 | -4; | |
1275 | ||
7d6d10f9 NC |
1276 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr |
1277 | - input_section->vma); | |
8e2eebc8 | 1278 | |
e1aeb285 NC |
1279 | bfd_put_32 (output_bfd, |
1280 | insert_thumb_branch (tmp, ret_offset), | |
7d6d10f9 NC |
1281 | contents + rel->r_vaddr |
1282 | - input_section->vma); | |
e1aeb285 NC |
1283 | |
1284 | done = 1; | |
1285 | } | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | /* If the relocation type and destination symbol does not | |
1290 | fall into one of the above categories, then we can just | |
1291 | perform a direct link. */ | |
1292 | ||
1293 | if (done) | |
1294 | rstat = bfd_reloc_ok; | |
1295 | else | |
1296 | #endif /* THUMBEXTENSION */ | |
1297 | if ( h->root.type == bfd_link_hash_defined | |
1298 | || h->root.type == bfd_link_hash_defweak) | |
1299 | { | |
1300 | asection *sec; | |
1301 | ||
1302 | sec = h->root.u.def.section; | |
1303 | val = (h->root.u.def.value | |
1304 | + sec->output_section->vma | |
1305 | + sec->output_offset); | |
1306 | } | |
1307 | ||
1308 | else if (! info->relocateable) | |
1309 | { | |
1310 | if (! ((*info->callbacks->undefined_symbol) | |
1311 | (info, h->root.root.string, input_bfd, input_section, | |
1312 | rel->r_vaddr - input_section->vma))) | |
1313 | return false; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | if (info->base_file) | |
1318 | { | |
1319 | /* Emit a reloc if the backend thinks it needs it. */ | |
1320 | if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto)) | |
1321 | { | |
1322 | /* relocation to a symbol in a section which | |
1323 | isn't absolute - we output the address here | |
1324 | to a file */ | |
1325 | bfd_vma addr = rel->r_vaddr | |
1326 | - input_section->vma | |
1327 | + input_section->output_offset | |
1328 | + input_section->output_section->vma; | |
1329 | if (coff_data(output_bfd)->pe) | |
1330 | addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; | |
1331 | /* FIXME: Shouldn't 4 be sizeof (addr)? */ | |
1332 | fwrite (&addr, 1,4, (FILE *) info->base_file); | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | #if 1 /* THUMBEXTENSION */ | |
1337 | if (done) | |
f6727b90 | 1338 | rstat = bfd_reloc_ok; |
e1aeb285 NC |
1339 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ |
1340 | else if (! info->relocateable | |
1341 | && howto->type == ARM_THUMB23) | |
1342 | { | |
1343 | /* This is pretty much a copy of what the default | |
1344 | _bfd_final_link_relocate and _bfd_relocate_contents | |
1345 | routines do to perform a relocation, with special | |
1346 | processing for the split addressing of the Thumb BL | |
1347 | instruction. Again, it would probably be simpler adding a | |
1348 | ThumbBRANCH23 specific macro expansion into the default | |
1349 | code. */ | |
1350 | ||
1351 | bfd_vma address = rel->r_vaddr - input_section->vma; | |
1352 | ||
1353 | if (address > input_section->_raw_size) | |
7d6d10f9 | 1354 | rstat = bfd_reloc_outofrange; |
e1aeb285 NC |
1355 | else |
1356 | { | |
1357 | bfd_vma relocation = val + addend; | |
1358 | int size = bfd_get_reloc_size (howto); | |
1359 | boolean overflow = false; | |
1360 | bfd_byte * location = contents + address; | |
1361 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1362 | bfd_vma src_mask = 0x007FFFFE; | |
1363 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; | |
1364 | bfd_signed_vma reloc_signed_min = ~reloc_signed_max; | |
1365 | bfd_vma check; | |
1366 | bfd_signed_vma signed_check; | |
1367 | bfd_vma add; | |
1368 | bfd_signed_vma signed_add; | |
1369 | ||
1370 | BFD_ASSERT (size == 4); | |
1371 | ||
1372 | /* howto->pc_relative should be TRUE for type 14 BRANCH23 */ | |
1373 | relocation -= (input_section->output_section->vma | |
1374 | + input_section->output_offset); | |
1375 | ||
1376 | /* howto->pcrel_offset should be TRUE for type 14 BRANCH23 */ | |
1377 | relocation -= address; | |
1378 | ||
1379 | /* No need to negate the relocation with BRANCH23. */ | |
1380 | /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */ | |
1381 | /* howto->rightshift == 1 */ | |
1382 | /* Drop unwanted bits from the value we are relocating to. */ | |
1383 | ||
1384 | check = relocation >> howto->rightshift; | |
1385 | ||
1386 | /* If this is a signed value, the rightshift just dropped | |
1387 | leading 1 bits (assuming twos complement). */ | |
1388 | if ((bfd_signed_vma) relocation >= 0) | |
1389 | signed_check = check; | |
1390 | else | |
1391 | signed_check = (check | |
1392 | | ((bfd_vma) - 1 | |
1393 | & ~((bfd_vma) - 1 >> howto->rightshift))); | |
1394 | ||
1395 | /* Get the value from the object file. */ | |
1396 | if (bfd_big_endian (input_bfd)) | |
1397 | { | |
1398 | add = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1); | |
1399 | } | |
1400 | else | |
1401 | { | |
1402 | add = ((((x) & 0x7ff) << 12) | (((x) & 0x07ff0000) >> 15)); | |
1403 | } | |
1404 | ||
1405 | /* Get the value from the object file with an appropriate sign. | |
1406 | The expression involving howto->src_mask isolates the upper | |
1407 | bit of src_mask. If that bit is set in the value we are | |
1408 | adding, it is negative, and we subtract out that number times | |
1409 | two. If src_mask includes the highest possible bit, then we | |
1410 | can not get the upper bit, but that does not matter since | |
1411 | signed_add needs no adjustment to become negative in that | |
1412 | case. */ | |
1413 | ||
1414 | signed_add = add; | |
1415 | ||
1416 | if ((add & (((~ src_mask) >> 1) & src_mask)) != 0) | |
1417 | signed_add -= (((~ src_mask) >> 1) & src_mask) << 1; | |
1418 | ||
1419 | /* Add the value from the object file, shifted so that it is a | |
1420 | straight number. */ | |
1421 | /* howto->bitpos == 0 */ | |
1422 | ||
1423 | signed_check += signed_add; | |
1424 | relocation += signed_add; | |
1425 | ||
1426 | BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed); | |
1427 | ||
1428 | /* Assumes two's complement. */ | |
1429 | if ( signed_check > reloc_signed_max | |
1430 | || signed_check < reloc_signed_min) | |
1431 | overflow = true; | |
1432 | ||
1433 | /* Put RELOCATION into the correct bits: */ | |
1434 | ||
1435 | if (bfd_big_endian (input_bfd)) | |
1436 | { | |
1437 | relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000)); | |
1438 | } | |
1439 | else | |
1440 | { | |
1441 | relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff)); | |
1442 | } | |
1443 | ||
1444 | /* Add RELOCATION to the correct bits of X: */ | |
1445 | x = ((x & ~howto->dst_mask) | relocation); | |
1446 | ||
1447 | /* Put the relocated value back in the object file: */ | |
1448 | bfd_put_32 (input_bfd, x, location); | |
1449 | ||
1450 | rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok; | |
1451 | } | |
1452 | } | |
1453 | else | |
1454 | #endif /* THUMBEXTENSION */ | |
1455 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1456 | contents, | |
1457 | rel->r_vaddr - input_section->vma, | |
1458 | val, addend); | |
1459 | #if 1 /* THUMBEXTENSION */ | |
1460 | /* FIXME: | |
1461 | Is this the best way to fix up thumb addresses? krk@cygnus.com | |
1462 | Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */ | |
1463 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ | |
1464 | if (! info->relocateable | |
1465 | && rel->r_type == ARM_32) | |
1466 | { | |
1467 | /* Determine if we need to set the bottom bit of a relocated address | |
1468 | because the address is the address of a Thumb code symbol. */ | |
1469 | ||
1470 | int patchit = false; | |
1471 | ||
1472 | if (h != NULL | |
1473 | && ( h->class == C_THUMBSTATFUNC | |
1474 | || h->class == C_THUMBEXTFUNC)) | |
1475 | { | |
1476 | patchit = true; | |
1477 | } | |
1478 | else if (sym != NULL | |
1479 | && sym->n_scnum > N_UNDEF) | |
1480 | { | |
1481 | /* No hash entry - use the symbol instead. */ | |
1482 | ||
1483 | if ( sym->n_sclass == C_THUMBSTATFUNC | |
1484 | || sym->n_sclass == C_THUMBEXTFUNC) | |
1485 | patchit = true; | |
1486 | } | |
454515c0 | 1487 | |
e1aeb285 NC |
1488 | if (patchit) |
1489 | { | |
1490 | bfd_byte * location = contents + rel->r_vaddr - input_section->vma; | |
1491 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1492 | ||
1493 | bfd_put_32 (input_bfd, x | 1, location); | |
1494 | } | |
1495 | } | |
1496 | #endif /* THUMBEXTENSION */ | |
1497 | ||
1498 | switch (rstat) | |
1499 | { | |
1500 | default: | |
1501 | abort (); | |
1502 | case bfd_reloc_ok: | |
1503 | break; | |
1504 | case bfd_reloc_outofrange: | |
1505 | (*_bfd_error_handler) | |
1506 | ("%s: bad reloc address 0x%lx in section `%s'", | |
1507 | bfd_get_filename (input_bfd), | |
1508 | (unsigned long) rel->r_vaddr, | |
1509 | bfd_get_section_name (input_bfd, input_section)); | |
1510 | return false; | |
1511 | case bfd_reloc_overflow: | |
1512 | { | |
1513 | const char *name; | |
1514 | char buf[SYMNMLEN + 1]; | |
1515 | ||
1516 | if (symndx == -1) | |
1517 | name = "*ABS*"; | |
1518 | else if (h != NULL) | |
1519 | name = h->root.root.string; | |
1520 | else | |
1521 | { | |
1522 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); | |
1523 | if (name == NULL) | |
1524 | return false; | |
1525 | } | |
1526 | ||
1527 | if (! ((*info->callbacks->reloc_overflow) | |
1528 | (info, name, howto->name, (bfd_vma) 0, input_bfd, | |
1529 | input_section, rel->r_vaddr - input_section->vma))) | |
1530 | return false; | |
1531 | } | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | return true; | |
1536 | } | |
1537 | ||
7d6d10f9 | 1538 | #ifndef COFF_WITH_PE |
33d5d351 | 1539 | boolean |
7d6d10f9 NC |
1540 | bfd_arm_allocate_interworking_sections (info) |
1541 | struct bfd_link_info * info; | |
e1aeb285 | 1542 | { |
7d6d10f9 NC |
1543 | asection * s; |
1544 | bfd_byte * foo; | |
1545 | struct coff_arm_link_hash_table * globals; | |
8e2eebc8 | 1546 | #if 0 |
7d6d10f9 | 1547 | static char test_char = '1'; |
8e2eebc8 | 1548 | #endif |
454515c0 | 1549 | |
7d6d10f9 NC |
1550 | globals = coff_arm_hash_table (info); |
1551 | ||
1552 | BFD_ASSERT (globals != NULL); | |
1553 | ||
1554 | if (globals->arm_glue_size != 0) | |
e1aeb285 | 1555 | { |
7d6d10f9 | 1556 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
e1aeb285 | 1557 | |
7d6d10f9 NC |
1558 | s = bfd_get_section_by_name |
1559 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
e1aeb285 NC |
1560 | |
1561 | BFD_ASSERT (s != NULL); | |
1562 | ||
7d6d10f9 NC |
1563 | foo = (bfd_byte *) bfd_alloc |
1564 | (globals->bfd_of_glue_owner, globals->arm_glue_size); | |
454515c0 | 1565 | #if 0 |
7d6d10f9 | 1566 | memset (foo, test_char, globals->arm_glue_size); |
8e2eebc8 | 1567 | #endif |
e1aeb285 | 1568 | |
7d6d10f9 | 1569 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; |
e1aeb285 NC |
1570 | s->contents = foo; |
1571 | } | |
1572 | ||
7d6d10f9 | 1573 | if (globals->thumb_glue_size != 0) |
e1aeb285 | 1574 | { |
7d6d10f9 | 1575 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
e1aeb285 | 1576 | |
7d6d10f9 NC |
1577 | s = bfd_get_section_by_name |
1578 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
e1aeb285 NC |
1579 | |
1580 | BFD_ASSERT (s != NULL); | |
1581 | ||
7d6d10f9 NC |
1582 | foo = (bfd_byte *) bfd_alloc |
1583 | (globals->bfd_of_glue_owner, globals->thumb_glue_size); | |
8e2eebc8 | 1584 | #if 0 |
7d6d10f9 | 1585 | memset (foo, test_char, globals->thumb_glue_size); |
8e2eebc8 | 1586 | #endif |
e1aeb285 | 1587 | |
7d6d10f9 | 1588 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; |
e1aeb285 NC |
1589 | s->contents = foo; |
1590 | } | |
1591 | ||
1592 | return true; | |
1593 | } | |
1594 | ||
1595 | static void | |
1596 | record_arm_to_thumb_glue (info, h) | |
1597 | struct bfd_link_info * info; | |
1598 | struct coff_link_hash_entry * h; | |
1599 | { | |
7d6d10f9 NC |
1600 | const char * name = h->root.root.string; |
1601 | register asection * s; | |
1602 | char * tmp_name; | |
1603 | struct coff_link_hash_entry * myh; | |
1604 | struct coff_arm_link_hash_table * globals; | |
e1aeb285 | 1605 | |
7d6d10f9 | 1606 | globals = coff_arm_hash_table (info); |
454515c0 | 1607 | |
7d6d10f9 NC |
1608 | BFD_ASSERT (globals != NULL); |
1609 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
e1aeb285 | 1610 | |
7d6d10f9 NC |
1611 | s = bfd_get_section_by_name |
1612 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
e1aeb285 NC |
1613 | |
1614 | BFD_ASSERT (s != NULL); | |
1615 | ||
1616 | tmp_name = ((char *) | |
1617 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME))); | |
1618 | ||
1619 | BFD_ASSERT (tmp_name); | |
1620 | ||
1621 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
1622 | ||
7d6d10f9 NC |
1623 | myh = coff_link_hash_lookup |
1624 | (coff_hash_table (info), tmp_name, false, false, true); | |
e1aeb285 NC |
1625 | |
1626 | if (myh != NULL) | |
1627 | { | |
1628 | free (tmp_name); | |
1629 | return; /* we've already seen this guy */ | |
1630 | } | |
1631 | ||
7d6d10f9 | 1632 | /* The only trick here is using globals->arm_glue_size as the value. Even |
e1aeb285 NC |
1633 | though the section isn't allocated yet, this is where we will be putting |
1634 | it. */ | |
1635 | ||
7d6d10f9 | 1636 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, |
e1aeb285 | 1637 | BSF_EXPORT | BSF_GLOBAL, |
7d6d10f9 | 1638 | s, globals->arm_glue_size + 1, |
e1aeb285 NC |
1639 | NULL, true, false, |
1640 | (struct bfd_link_hash_entry **) & myh); | |
1641 | ||
7d6d10f9 | 1642 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; |
e1aeb285 NC |
1643 | |
1644 | free (tmp_name); | |
1645 | ||
1646 | return; | |
1647 | } | |
1648 | ||
1649 | static void | |
1650 | record_thumb_to_arm_glue (info, h) | |
1651 | struct bfd_link_info * info; | |
1652 | struct coff_link_hash_entry * h; | |
1653 | { | |
7d6d10f9 NC |
1654 | const char * name = h->root.root.string; |
1655 | register asection * s; | |
1656 | char * tmp_name; | |
1657 | struct coff_link_hash_entry * myh; | |
1658 | struct coff_arm_link_hash_table * globals; | |
e1aeb285 | 1659 | |
7d6d10f9 NC |
1660 | |
1661 | globals = coff_arm_hash_table (info); | |
1662 | ||
1663 | BFD_ASSERT (globals != NULL); | |
1664 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
e1aeb285 | 1665 | |
7d6d10f9 NC |
1666 | s = bfd_get_section_by_name |
1667 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
e1aeb285 NC |
1668 | |
1669 | BFD_ASSERT (s != NULL); | |
1670 | ||
1671 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME)); | |
1672 | ||
1673 | BFD_ASSERT (tmp_name); | |
1674 | ||
1675 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
1676 | ||
7d6d10f9 NC |
1677 | myh = coff_link_hash_lookup |
1678 | (coff_hash_table (info), tmp_name, false, false, true); | |
e1aeb285 NC |
1679 | |
1680 | if (myh != NULL) | |
1681 | { | |
1682 | free (tmp_name); | |
1683 | return; /* we've already seen this guy */ | |
1684 | } | |
1685 | ||
7d6d10f9 NC |
1686 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, |
1687 | BSF_LOCAL, s, globals->thumb_glue_size + 1, | |
e1aeb285 NC |
1688 | NULL, true, false, |
1689 | (struct bfd_link_hash_entry **) & myh); | |
1690 | ||
454515c0 | 1691 | /* If we mark it 'thumb', the disassembler will do a better job. */ |
e1aeb285 NC |
1692 | myh->class = C_THUMBEXTFUNC; |
1693 | ||
1694 | free (tmp_name); | |
1695 | ||
1696 | #define CHANGE_TO_ARM "__%s_change_to_arm" | |
1697 | ||
1698 | tmp_name = ((char *) | |
1699 | bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM))); | |
1700 | ||
1701 | BFD_ASSERT (tmp_name); | |
1702 | ||
1703 | sprintf (tmp_name, CHANGE_TO_ARM, name); | |
1704 | ||
1705 | myh = NULL; | |
1706 | ||
454515c0 | 1707 | /* Now allocate another symbol to switch back to arm mode. */ |
7d6d10f9 NC |
1708 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, |
1709 | BSF_LOCAL, s, globals->thumb_glue_size + 4, | |
e1aeb285 NC |
1710 | NULL, true, false, |
1711 | (struct bfd_link_hash_entry **) & myh); | |
1712 | ||
1713 | free (tmp_name); | |
1714 | ||
7d6d10f9 | 1715 | globals->thumb_glue_size += THUMB2ARM_GLUE_SIZE; |
e1aeb285 NC |
1716 | |
1717 | return; | |
1718 | } | |
1719 | ||
7d6d10f9 NC |
1720 | /* Select a BFD to be used to hold the sections used by the glue code. |
1721 | This function is called from the linker scripts in ld/emultempl/ | |
1722 | {armcoff/pe}.em */ | |
33d5d351 | 1723 | boolean |
7d6d10f9 NC |
1724 | bfd_arm_get_bfd_for_interworking (abfd, info) |
1725 | bfd * abfd; | |
1726 | struct bfd_link_info * info; | |
1727 | { | |
1728 | struct coff_arm_link_hash_table * globals; | |
1729 | flagword flags; | |
1730 | asection * sec; | |
1731 | ||
1732 | /* If we are only performing a partial link do not bother | |
1733 | getting a bfd to hold the glue. */ | |
1734 | if (info->relocateable) | |
1735 | return true; | |
1736 | ||
1737 | globals = coff_arm_hash_table (info); | |
1738 | ||
1739 | BFD_ASSERT (globals != NULL); | |
1740 | ||
1741 | if (globals->bfd_of_glue_owner != NULL) | |
1742 | return true; | |
1743 | ||
1744 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
1745 | ||
1746 | if (sec == NULL) | |
1747 | { | |
1748 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
1749 | ||
1750 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
1751 | ||
1752 | if (sec == NULL | |
1753 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1754 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1755 | return false; | |
1756 | } | |
1757 | ||
1758 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1759 | ||
1760 | if (sec == NULL) | |
1761 | { | |
1762 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
1763 | ||
1764 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1765 | ||
1766 | if (sec == NULL | |
1767 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1768 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1769 | return false; | |
1770 | } | |
1771 | ||
1772 | /* Save the bfd for later use. */ | |
1773 | globals->bfd_of_glue_owner = abfd; | |
1774 | ||
1775 | return true; | |
1776 | } | |
1777 | ||
1778 | boolean | |
1779 | bfd_arm_process_before_allocation (abfd, info) | |
e1aeb285 NC |
1780 | bfd * abfd; |
1781 | struct bfd_link_info * info; | |
1782 | { | |
1783 | asection * sec; | |
7d6d10f9 | 1784 | struct coff_arm_link_hash_table * globals; |
e1aeb285 NC |
1785 | |
1786 | /* If we are only performing a partial link do not bother | |
1787 | to construct any glue. */ | |
1788 | if (info->relocateable) | |
1789 | return true; | |
1790 | ||
1791 | /* Here we have a bfd that is to be included on the link. We have a hook | |
1792 | to do reloc rummaging, before section sizes are nailed down. */ | |
1793 | ||
1794 | _bfd_coff_get_external_symbols (abfd); | |
1795 | ||
7d6d10f9 NC |
1796 | globals = coff_arm_hash_table (info); |
1797 | ||
1798 | BFD_ASSERT (globals != NULL); | |
1799 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
38c574bb | 1800 | |
e1aeb285 NC |
1801 | /* Rummage around all the relocs and map the glue vectors. */ |
1802 | sec = abfd->sections; | |
1803 | ||
1804 | if (sec == NULL) | |
1805 | return true; | |
1806 | ||
1807 | for (; sec != NULL; sec = sec->next) | |
1808 | { | |
1809 | struct internal_reloc * i; | |
1810 | struct internal_reloc * rel; | |
454515c0 | 1811 | |
e1aeb285 NC |
1812 | if (sec->reloc_count == 0) |
1813 | continue; | |
1814 | ||
1815 | /* Load the relocs. */ | |
1816 | /* FIXME: there may be a storage leak here. */ | |
1817 | ||
1818 | i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0); | |
1819 | ||
1820 | BFD_ASSERT (i != 0); | |
1821 | ||
1822 | for (rel = i; rel < i + sec->reloc_count; ++rel) | |
1823 | { | |
1824 | unsigned short r_type = rel->r_type; | |
1825 | long symndx; | |
1826 | struct coff_link_hash_entry * h; | |
1827 | ||
1828 | symndx = rel->r_symndx; | |
1829 | ||
7d6d10f9 | 1830 | /* If the relocation is not against a symbol it cannot concern us. */ |
e1aeb285 NC |
1831 | if (symndx == -1) |
1832 | continue; | |
1833 | ||
1834 | h = obj_coff_sym_hashes (abfd)[symndx]; | |
1835 | ||
1836 | /* If the relocation is against a static symbol it must be within | |
454515c0 | 1837 | the current section and so cannot be a cross ARM/Thumb relocation. */ |
e1aeb285 NC |
1838 | if (h == NULL) |
1839 | continue; | |
1840 | ||
1841 | switch (r_type) | |
1842 | { | |
1843 | case ARM_26: | |
1844 | /* This one is a call from arm code. We need to look up | |
1845 | the target of the call. If it is a thumb target, we | |
1846 | insert glue. */ | |
1847 | ||
1848 | if (h->class == C_THUMBEXTFUNC) | |
454515c0 | 1849 | record_arm_to_thumb_glue (info, h); |
e1aeb285 NC |
1850 | break; |
1851 | ||
1852 | case ARM_THUMB23: | |
1853 | /* This one is a call from thumb code. We used to look | |
1854 | for ARM_THUMB9 and ARM_THUMB12 as well. We need to look | |
1855 | up the target of the call. If it is an arm target, we | |
454515c0 NC |
1856 | insert glue. If the symbol does not exist it will be |
1857 | given a class of C_EXT and so we will generate a stub | |
1858 | for it. This is not really a problem, since the link | |
1859 | is doomed anyway. */ | |
1860 | ||
e1aeb285 NC |
1861 | switch (h->class) |
1862 | { | |
1863 | case C_EXT: | |
1864 | case C_STAT: | |
1865 | case C_LABEL: | |
1866 | record_thumb_to_arm_glue (info, h); | |
1867 | break; | |
1868 | default: | |
1869 | ; | |
1870 | } | |
1871 | break; | |
1872 | ||
1873 | default: | |
1874 | break; | |
1875 | } | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | return true; | |
1880 | } | |
7d6d10f9 NC |
1881 | #endif /* ! COFF_WITH_PE */ |
1882 | ||
1883 | #define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup | |
1884 | #define coff_relocate_section coff_arm_relocate_section | |
1885 | #define coff_bfd_is_local_label_name coff_arm_is_local_label_name | |
1886 | #define coff_adjust_symndx coff_arm_adjust_symndx | |
1887 | #define coff_link_output_has_begun coff_arm_link_output_has_begun | |
1888 | #define coff_final_link_postscript coff_arm_final_link_postscript | |
1889 | #define coff_bfd_merge_private_bfd_data coff_arm_merge_private_bfd_data | |
1890 | #define coff_bfd_print_private_bfd_data coff_arm_print_private_bfd_data | |
1891 | #define coff_bfd_set_private_flags _bfd_coff_arm_set_private_flags | |
1892 | #define coff_bfd_copy_private_bfd_data coff_arm_copy_private_bfd_data | |
1893 | #define coff_bfd_link_hash_table_create coff_arm_link_hash_table_create | |
e1aeb285 | 1894 | |
e1aeb285 NC |
1895 | |
1896 | /* When doing a relocateable link, we want to convert ARM26 relocs | |
1897 | into ARM26D relocs. */ | |
1898 | ||
1899 | static boolean | |
1900 | coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp) | |
1901 | bfd *obfd; | |
1902 | struct bfd_link_info *info; | |
1903 | bfd *ibfd; | |
1904 | asection *sec; | |
1905 | struct internal_reloc *irel; | |
1906 | boolean *adjustedp; | |
1907 | { | |
1908 | if (irel->r_type == 3) | |
1909 | { | |
1910 | struct coff_link_hash_entry *h; | |
1911 | ||
1912 | h = obj_coff_sym_hashes (ibfd)[irel->r_symndx]; | |
1913 | if (h != NULL | |
1914 | && (h->root.type == bfd_link_hash_defined | |
1915 | || h->root.type == bfd_link_hash_defweak) | |
1916 | && h->root.u.def.section->output_section == sec->output_section) | |
1917 | irel->r_type = 7; | |
1918 | } | |
1919 | *adjustedp = false; | |
1920 | return true; | |
1921 | } | |
1922 | ||
e1aeb285 NC |
1923 | /* Called when merging the private data areas of two BFDs. |
1924 | This is important as it allows us to detect if we are | |
1925 | attempting to merge binaries compiled for different ARM | |
1926 | targets, eg different CPUs or differents APCS's. */ | |
1927 | ||
7d6d10f9 NC |
1928 | static boolean |
1929 | coff_arm_merge_private_bfd_data (ibfd, obfd) | |
e1aeb285 NC |
1930 | bfd * ibfd; |
1931 | bfd * obfd; | |
1932 | { | |
1933 | BFD_ASSERT (ibfd != NULL && obfd != NULL); | |
1934 | ||
1935 | if (ibfd == obfd) | |
1936 | return true; | |
1937 | ||
f5ddda0f NC |
1938 | /* If the two formats are different we cannot merge anything. |
1939 | This is not an error, since it is permissable to change the | |
1940 | input and output formats. */ | |
38c574bb NC |
1941 | if ( ibfd->xvec->flavour != bfd_target_coff_flavour |
1942 | || obfd->xvec->flavour != bfd_target_coff_flavour) | |
f5ddda0f | 1943 | return true; |
38c574bb | 1944 | |
e1aeb285 NC |
1945 | /* Verify that the APCS is the same for the two BFDs */ |
1946 | if (APCS_SET (ibfd)) | |
1947 | { | |
1948 | if (APCS_SET (obfd)) | |
1949 | { | |
1950 | /* If the src and dest have different APCS flag bits set, fail. */ | |
1951 | if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd)) | |
1952 | { | |
1953 | _bfd_error_handler | |
1954 | ("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d", | |
1955 | bfd_get_filename (ibfd), APCS_26_FLAG (ibfd) ? 26 : 32, | |
1956 | bfd_get_filename (obfd), APCS_26_FLAG (obfd) ? 26 : 32 | |
1957 | ); | |
1958 | ||
1959 | bfd_set_error (bfd_error_wrong_format); | |
1960 | return false; | |
1961 | } | |
1962 | ||
1963 | if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd)) | |
1964 | { | |
1965 | _bfd_error_handler | |
1966 | ("%s: ERROR: passes floats in %s registers whereas target %s uses %s registers", | |
1967 | bfd_get_filename (ibfd), APCS_FLOAT_FLAG (ibfd) ? "float" : "integer", | |
1968 | bfd_get_filename (obfd), APCS_FLOAT_FLAG (obfd) ? "float" : "integer" | |
1969 | ); | |
1970 | ||
1971 | bfd_set_error (bfd_error_wrong_format); | |
1972 | return false; | |
1973 | } | |
1974 | ||
1975 | if (PIC_FLAG (obfd) != PIC_FLAG (ibfd)) | |
1976 | { | |
1977 | _bfd_error_handler | |
1978 | ("%s: ERROR: compiled as %s code, whereas target %s is %s", | |
1979 | bfd_get_filename (ibfd), PIC_FLAG (ibfd) ? "position independent" : "absoluste position", | |
1980 | bfd_get_filename (obfd), PIC_FLAG (obfd) ? "position independent" : "absoluste position" | |
1981 | ); | |
1982 | ||
1983 | bfd_set_error (bfd_error_wrong_format); | |
1984 | return false; | |
1985 | } | |
1986 | } | |
1987 | else | |
1988 | { | |
1989 | SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd)); | |
1990 | ||
1991 | /* Set up the arch and fields as well as these are probably wrong. */ | |
1992 | bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
1993 | } | |
1994 | } | |
38c574bb | 1995 | |
e1aeb285 NC |
1996 | /* Check the interworking support. */ |
1997 | if (INTERWORK_SET (ibfd)) | |
1998 | { | |
1999 | if (INTERWORK_SET (obfd)) | |
2000 | { | |
2001 | /* If the src and dest differ in their interworking issue a warning. */ | |
2002 | if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd)) | |
2003 | { | |
2004 | _bfd_error_handler | |
2005 | ("Warning: input file %s %s interworking, whereas %s does%s", | |
2006 | bfd_get_filename (ibfd), | |
2007 | INTERWORK_FLAG (ibfd) ? "supports" : "does not support", | |
2008 | bfd_get_filename (obfd), | |
2009 | INTERWORK_FLAG (obfd) ? "." : " not." | |
2010 | ); | |
2011 | } | |
2012 | } | |
2013 | else | |
2014 | { | |
2015 | SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd)); | |
2016 | } | |
2017 | } | |
2018 | ||
2019 | return true; | |
2020 | } | |
2021 | ||
2022 | ||
8e2eebc8 | 2023 | /* Display the flags field. */ |
e1aeb285 | 2024 | |
7d6d10f9 NC |
2025 | static boolean |
2026 | coff_arm_print_private_bfd_data (abfd, ptr) | |
e1aeb285 NC |
2027 | bfd * abfd; |
2028 | PTR ptr; | |
2029 | { | |
2030 | FILE * file = (FILE *) ptr; | |
2031 | ||
2032 | BFD_ASSERT (abfd != NULL && ptr != NULL) | |
2033 | ||
f5ddda0f | 2034 | fprintf (file, "private flags = %x", coff_data (abfd)->flags); |
e1aeb285 NC |
2035 | |
2036 | if (APCS_SET (abfd)) | |
2037 | fprintf (file, ": [APCS-%d] [floats passed in %s registers] [%s]", | |
2038 | APCS_26_FLAG (abfd) ? 26 : 32, | |
2039 | APCS_FLOAT_FLAG (abfd) ? "float" : "integer", | |
2040 | PIC_FLAG (abfd) ? "position independent" : "absolute position" | |
2041 | ); | |
2042 | ||
2043 | if (INTERWORK_SET (abfd)) | |
38c574bb | 2044 | fprintf (file, " [interworking %ssupported]", |
e1aeb285 | 2045 | INTERWORK_FLAG (abfd) ? "" : "not " ); |
38c574bb NC |
2046 | else |
2047 | fprintf (file, " [interworking flag not initialised]"); | |
e1aeb285 NC |
2048 | |
2049 | fputc ('\n', file); | |
2050 | ||
2051 | return true; | |
2052 | } | |
2053 | ||
2054 | ||
2055 | /* Copies the given flags into the coff_tdata.flags field. | |
2056 | Typically these flags come from the f_flags[] field of | |
2057 | the COFF filehdr structure, which contains important, | |
7d6d10f9 NC |
2058 | target specific information. |
2059 | Note: Although this function is static, it is explicitly | |
2060 | called from both coffcode.h and peicode.h. */ | |
e1aeb285 | 2061 | |
7d6d10f9 NC |
2062 | static boolean |
2063 | _bfd_coff_arm_set_private_flags (abfd, flags) | |
e1aeb285 NC |
2064 | bfd * abfd; |
2065 | flagword flags; | |
2066 | { | |
f6727b90 | 2067 | flagword flag; |
e1aeb285 NC |
2068 | |
2069 | BFD_ASSERT (abfd != NULL); | |
2070 | ||
2071 | flag = (flags & F_APCS26) ? F_APCS_26 : 0; | |
2072 | ||
2073 | /* Make sure that the APCS field has not been initialised to the opposite value. */ | |
2074 | if (APCS_SET (abfd) | |
2075 | && ( (APCS_26_FLAG (abfd) != flag) | |
2076 | || (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT)) | |
2077 | || (PIC_FLAG (abfd) != (flags & F_PIC)) | |
2078 | )) | |
2079 | return false; | |
2080 | ||
2081 | flag |= (flags & (F_APCS_FLOAT | F_PIC)); | |
2082 | ||
2083 | SET_APCS_FLAGS (abfd, flag); | |
2084 | ||
2085 | flag = (flags & F_INTERWORK); | |
2086 | ||
2087 | /* If either the flags or the BFD do support interworking then do not set the interworking flag. */ | |
2088 | if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag)) | |
2089 | flag = 0; | |
2090 | ||
2091 | SET_INTERWORK_FLAG (abfd, flag); | |
2092 | ||
2093 | return true; | |
2094 | } | |
2095 | ||
2096 | ||
2097 | /* Copy the important parts of the target specific data | |
2098 | from one instance of a BFD to another. */ | |
2099 | ||
7d6d10f9 NC |
2100 | static boolean |
2101 | coff_arm_copy_private_bfd_data (src, dest) | |
e1aeb285 NC |
2102 | bfd * src; |
2103 | bfd * dest; | |
2104 | { | |
2105 | BFD_ASSERT (src != NULL && dest != NULL); | |
38c574bb | 2106 | |
e1aeb285 NC |
2107 | if (src == dest) |
2108 | return true; | |
2109 | ||
2110 | /* If the destination is not in the same format as the source, do not do the copy. */ | |
2111 | if (src->xvec != dest->xvec) | |
2112 | return true; | |
2113 | ||
2114 | /* copy the flags field */ | |
2115 | if (APCS_SET (src)) | |
2116 | { | |
2117 | if (APCS_SET (dest)) | |
2118 | { | |
2119 | /* If the src and dest have different APCS flag bits set, fail. */ | |
2120 | if (APCS_26_FLAG (dest) != APCS_26_FLAG (src)) | |
2121 | return false; | |
2122 | ||
2123 | if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src)) | |
2124 | return false; | |
2125 | ||
2126 | if (PIC_FLAG (dest) != PIC_FLAG (src)) | |
2127 | return false; | |
2128 | } | |
2129 | else | |
2130 | SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src) | PIC_FLAG (src)); | |
2131 | } | |
2132 | ||
2133 | if (INTERWORK_SET (src)) | |
2134 | { | |
2135 | if (INTERWORK_SET (dest)) | |
2136 | { | |
2137 | /* If the src and dest have different interworking flags then turn off the interworking bit. */ | |
2138 | if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src)) | |
2139 | SET_INTERWORK_FLAG (dest, 0); | |
2140 | } | |
2141 | else | |
2142 | { | |
2143 | SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src)); | |
2144 | } | |
2145 | } | |
2146 | ||
2147 | return true; | |
2148 | } | |
2149 | ||
2150 | /* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX | |
2151 | *must* match the definitions on gcc/config/arm/semi.h. */ | |
2152 | #define LOCAL_LABEL_PREFIX "." | |
09888f15 | 2153 | #define USER_LABEL_PREFIX "_" |
e1aeb285 | 2154 | |
7d6d10f9 | 2155 | static boolean |
e1aeb285 NC |
2156 | coff_arm_is_local_label_name (abfd, name) |
2157 | bfd * abfd; | |
2158 | const char * name; | |
2159 | { | |
2160 | #ifdef LOCAL_LABEL_PREFIX | |
2161 | /* If there is a prefix for local labels then look for this. | |
2162 | If the prefix exists, but it is empty, then ignore the test. */ | |
2163 | ||
2164 | if (LOCAL_LABEL_PREFIX[0] != 0) | |
2165 | { | |
2166 | if (strncmp (name, LOCAL_LABEL_PREFIX, strlen (LOCAL_LABEL_PREFIX)) == 0) | |
2167 | return true; | |
2168 | } | |
2169 | #endif | |
2170 | #ifdef USER_LABEL_PREFIX | |
2171 | if (USER_LABEL_PREFIX[0] != 0) | |
2172 | { | |
2173 | if (strncmp (name, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)) == 0) | |
2174 | return false; | |
2175 | } | |
2176 | #endif | |
2177 | ||
2178 | /* devo/gcc/config/dbxcoff.h defines ASM_OUTPUT_SOURCE_LINE to generate local line numbers as .LM<number>, so treat these as local. */ | |
2179 | ||
2180 | switch (name[0]) | |
2181 | { | |
2182 | case 'L': return true; | |
2183 | case '.': return (name[1] == 'L' && name[2] == 'M') ? true : false; | |
2184 | default: return false; /* Cannot make our minds up - default to false so that it will not be stripped by accident. */ | |
2185 | } | |
2186 | } | |
2187 | ||
e1aeb285 NC |
2188 | /* This piece of machinery exists only to guarantee that the bfd that holds |
2189 | the glue section is written last. | |
2190 | ||
2191 | This does depend on bfd_make_section attaching a new section to the | |
2192 | end of the section list for the bfd. | |
2193 | ||
8e2eebc8 | 2194 | krk@cygnus.com */ |
e1aeb285 | 2195 | |
7d6d10f9 NC |
2196 | static boolean |
2197 | coff_arm_link_output_has_begun (sub, info) | |
8e2eebc8 | 2198 | bfd * sub; |
7d6d10f9 | 2199 | struct coff_final_link_info * info; |
e1aeb285 | 2200 | { |
7d6d10f9 | 2201 | return (sub->output_has_begun || sub == coff_arm_hash_table (info->info)->bfd_of_glue_owner); |
8e2eebc8 | 2202 | } |
e1aeb285 | 2203 | |
7d6d10f9 | 2204 | static boolean |
8e2eebc8 ILT |
2205 | coff_arm_final_link_postscript (abfd, pfinfo) |
2206 | bfd * abfd; | |
2207 | struct coff_final_link_info * pfinfo; | |
2208 | { | |
7d6d10f9 NC |
2209 | struct coff_arm_link_hash_table * globals = coff_arm_hash_table (pfinfo->info); |
2210 | ||
2211 | BFD_ASSERT (globals != NULL); | |
2212 | ||
2213 | if (globals->bfd_of_glue_owner != NULL) | |
e1aeb285 | 2214 | { |
7d6d10f9 | 2215 | if (! _bfd_coff_link_input_bfd (pfinfo, globals->bfd_of_glue_owner)) |
e1aeb285 | 2216 | return false; |
7d6d10f9 NC |
2217 | |
2218 | globals->bfd_of_glue_owner->output_has_begun = true; | |
e1aeb285 | 2219 | } |
7d6d10f9 | 2220 | |
e1aeb285 | 2221 | return true; |
8e2eebc8 | 2222 | } |
e1aeb285 | 2223 | |
7d6d10f9 | 2224 | #if 0 |
8e2eebc8 | 2225 | #define coff_SWAP_sym_in arm_bfd_coff_swap_sym_in |
e1aeb285 | 2226 | |
8e2eebc8 | 2227 | static void coff_swap_sym_in PARAMS ((bfd *, PTR, PTR)); |
e1aeb285 | 2228 | |
8e2eebc8 ILT |
2229 | /* Sepcial version of symbol swapper, used to grab a bfd |
2230 | onto which the glue sections can be attached. */ | |
e1aeb285 NC |
2231 | static void |
2232 | arm_bfd_coff_swap_sym_in (abfd, ext1, in1) | |
8e2eebc8 ILT |
2233 | bfd * abfd; |
2234 | PTR ext1; | |
2235 | PTR in1; | |
e1aeb285 | 2236 | { |
e1aeb285 | 2237 | flagword flags; |
8e2eebc8 ILT |
2238 | register asection * s; |
2239 | ||
2240 | /* Do the normal swap in. */ | |
2241 | coff_swap_sym_in (abfd, ext1, in1); | |
2242 | ||
2243 | if (bfd_of_glue_owner != NULL) /* we already have a toc, so go home */ | |
e1aeb285 NC |
2244 | return; |
2245 | ||
8e2eebc8 | 2246 | /* Save the bfd for later allocation. */ |
e1aeb285 NC |
2247 | bfd_of_glue_owner = abfd; |
2248 | ||
2249 | s = bfd_get_section_by_name (bfd_of_glue_owner , | |
2250 | ARM2THUMB_GLUE_SECTION_NAME); | |
2251 | ||
2252 | if (s == NULL) | |
2253 | { | |
2254 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ; | |
2255 | ||
454515c0 | 2256 | s = bfd_make_section (bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); |
e1aeb285 NC |
2257 | |
2258 | if (s == NULL | |
2259 | || !bfd_set_section_flags (bfd_of_glue_owner, s, flags) | |
2260 | || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2)) | |
2261 | { | |
2262 | /* FIXME: set appropriate bfd error */ | |
2263 | abort(); | |
2264 | } | |
2265 | } | |
2266 | ||
454515c0 | 2267 | s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); |
e1aeb285 NC |
2268 | |
2269 | if (s == NULL) | |
2270 | { | |
2271 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ; | |
2272 | ||
454515c0 | 2273 | s = bfd_make_section (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); |
e1aeb285 NC |
2274 | |
2275 | if (s == NULL | |
2276 | || !bfd_set_section_flags (bfd_of_glue_owner, s, flags) | |
2277 | || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2)) | |
2278 | { | |
2279 | /* FIXME: set appropriate bfd error krk@cygnus.com */ | |
2280 | abort(); | |
2281 | } | |
2282 | } | |
2283 | ||
2284 | return; | |
2285 | } | |
7d6d10f9 | 2286 | #endif |
e1aeb285 | 2287 | |
8e2eebc8 | 2288 | #include "coffcode.h" |
e1aeb285 | 2289 | |
177b1932 | 2290 | const bfd_target |
3ea928f5 | 2291 | #ifdef TARGET_LITTLE_SYM |
177b1932 DE |
2292 | TARGET_LITTLE_SYM = |
2293 | #else | |
2294 | armcoff_little_vec = | |
2295 | #endif | |
943fbd5b | 2296 | { |
177b1932 DE |
2297 | #ifdef TARGET_LITTLE_NAME |
2298 | TARGET_LITTLE_NAME, | |
2299 | #else | |
2300 | "coff-arm-little", | |
2301 | #endif | |
943fbd5b | 2302 | bfd_target_coff_flavour, |
46686c78 NC |
2303 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
2304 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
943fbd5b KR |
2305 | |
2306 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2307 | HAS_LINENO | HAS_DEBUG | | |
2308 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
2309 | ||
46686c78 | 2310 | #ifndef COFF_WITH_PE |
943fbd5b | 2311 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ |
46686c78 NC |
2312 | #else |
2313 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
2314 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), | |
2315 | #endif | |
2316 | ||
943fbd5b KR |
2317 | #ifdef TARGET_UNDERSCORE |
2318 | TARGET_UNDERSCORE, /* leading underscore */ | |
2319 | #else | |
2320 | 0, /* leading underscore */ | |
2321 | #endif | |
2322 | '/', /* ar_pad_char */ | |
2323 | 15, /* ar_max_namelen */ | |
2324 | ||
943fbd5b KR |
2325 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
2326 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2327 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
2328 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2329 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2330 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
2331 | ||
2332 | /* Note that we allow an object file to be treated as a core file as well. */ | |
da7afe3b SC |
2333 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
2334 | bfd_generic_archive_p, coff_object_p}, | |
943fbd5b KR |
2335 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
2336 | bfd_false}, | |
2337 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
2338 | _bfd_write_archive_contents, bfd_false}, | |
2339 | ||
2340 | BFD_JUMP_TABLE_GENERIC (coff), | |
2341 | BFD_JUMP_TABLE_COPY (coff), | |
2342 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2343 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
2344 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
2345 | BFD_JUMP_TABLE_RELOCS (coff), | |
2346 | BFD_JUMP_TABLE_WRITE (coff), | |
2347 | BFD_JUMP_TABLE_LINK (coff), | |
2348 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2349 | ||
8e2eebc8 | 2350 | (PTR) & bfd_coff_std_swap_table, |
943fbd5b | 2351 | }; |
3ea928f5 | 2352 | |
177b1932 | 2353 | const bfd_target |
3ea928f5 | 2354 | #ifdef TARGET_BIG_SYM |
177b1932 DE |
2355 | TARGET_BIG_SYM = |
2356 | #else | |
2357 | armcoff_big_vec = | |
2358 | #endif | |
3ea928f5 | 2359 | { |
177b1932 DE |
2360 | #ifdef TARGET_BIG_NAME |
2361 | TARGET_BIG_NAME, | |
2362 | #else | |
2363 | "coff-arm-big", | |
2364 | #endif | |
3ea928f5 | 2365 | bfd_target_coff_flavour, |
46686c78 NC |
2366 | BFD_ENDIAN_BIG, /* data byte order is big */ |
2367 | BFD_ENDIAN_BIG, /* header byte order is big */ | |
3ea928f5 SC |
2368 | |
2369 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2370 | HAS_LINENO | HAS_DEBUG | | |
2371 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
2372 | ||
46686c78 | 2373 | #ifndef COFF_WITH_PE |
3ea928f5 | 2374 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ |
46686c78 NC |
2375 | #else |
2376 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
2377 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), | |
2378 | #endif | |
2379 | ||
3ea928f5 SC |
2380 | #ifdef TARGET_UNDERSCORE |
2381 | TARGET_UNDERSCORE, /* leading underscore */ | |
2382 | #else | |
2383 | 0, /* leading underscore */ | |
2384 | #endif | |
2385 | '/', /* ar_pad_char */ | |
2386 | 15, /* ar_max_namelen */ | |
2387 | ||
3ea928f5 SC |
2388 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
2389 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
2390 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
2391 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
2392 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
2393 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
2394 | ||
2395 | /* Note that we allow an object file to be treated as a core file as well. */ | |
da7afe3b SC |
2396 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
2397 | bfd_generic_archive_p, coff_object_p}, | |
3ea928f5 SC |
2398 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
2399 | bfd_false}, | |
2400 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
2401 | _bfd_write_archive_contents, bfd_false}, | |
2402 | ||
2403 | BFD_JUMP_TABLE_GENERIC (coff), | |
2404 | BFD_JUMP_TABLE_COPY (coff), | |
2405 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2406 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
2407 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
2408 | BFD_JUMP_TABLE_RELOCS (coff), | |
2409 | BFD_JUMP_TABLE_WRITE (coff), | |
2410 | BFD_JUMP_TABLE_LINK (coff), | |
2411 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2412 | ||
8e2eebc8 | 2413 | (PTR) & bfd_coff_std_swap_table, |
3ea928f5 | 2414 | }; |