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252b5132 | 1 | /* BFD back-end for ARM COFF files. |
fa0e42e4 | 2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999 |
252b5132 RH |
3 | Free Software Foundation, Inc. |
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" | |
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 | ||
36 | /* Macros for manipulation the bits in the flags field of the coff data | |
37 | structure. */ | |
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 | typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype; | |
52 | /* some typedefs for holding instructions */ | |
53 | typedef unsigned long int insn32; | |
54 | typedef unsigned short int insn16; | |
55 | ||
56 | ||
57 | /* Forward declarations for stupid compilers. */ | |
58 | static boolean coff_arm_relocate_section | |
59 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
60 | struct internal_reloc *, struct internal_syment *, asection **)); | |
61 | static bfd_reloc_status_type aoutarm_fix_pcrel_26_done | |
62 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
63 | static bfd_reloc_status_type aoutarm_fix_pcrel_26 | |
64 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
65 | static bfd_reloc_status_type coff_thumb_pcrel_23 | |
66 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
67 | static bfd_reloc_status_type coff_thumb_pcrel_12 | |
68 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
69 | static bfd_reloc_status_type coff_thumb_pcrel_9 | |
70 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
71 | static bfd_reloc_status_type coff_arm_reloc | |
72 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
73 | static boolean coff_arm_adjust_symndx | |
74 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, | |
75 | asection *, struct internal_reloc *, boolean *)); | |
76 | static reloc_howto_type * coff_arm_rtype_to_howto | |
77 | PARAMS ((bfd *, asection *, struct internal_reloc *, | |
78 | struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *)); | |
79 | static bfd_reloc_status_type coff_thumb_pcrel_common | |
80 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **, | |
81 | thumb_pcrel_branchtype)); | |
82 | static CONST struct reloc_howto_struct * coff_arm_reloc_type_lookup | |
83 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
84 | static struct bfd_link_hash_table * coff_arm_link_hash_table_create | |
85 | PARAMS ((bfd *)); | |
86 | static insn32 insert_thumb_branch | |
87 | PARAMS ((insn32, int)); | |
88 | static struct coff_link_hash_entry * find_thumb_glue | |
89 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
90 | static struct coff_link_hash_entry * find_arm_glue | |
91 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
92 | static void record_arm_to_thumb_glue | |
93 | PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *)); | |
94 | static void record_thumb_to_arm_glue | |
95 | PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *)); | |
96 | static boolean coff_arm_merge_private_bfd_data | |
97 | PARAMS ((bfd *, bfd *)); | |
98 | static boolean coff_arm_print_private_bfd_data | |
99 | PARAMS ((bfd *, PTR)); | |
100 | static boolean _bfd_coff_arm_set_private_flags | |
101 | PARAMS ((bfd *, flagword)); | |
102 | static boolean coff_arm_copy_private_bfd_data | |
103 | PARAMS ((bfd *, bfd *)); | |
104 | static boolean coff_arm_is_local_label_name | |
105 | PARAMS ((bfd *, const char *)); | |
106 | static boolean coff_arm_link_output_has_begun | |
107 | PARAMS ((bfd *, struct coff_final_link_info *)); | |
108 | static boolean coff_arm_final_link_postscript | |
109 | PARAMS ((bfd *, struct coff_final_link_info *)); | |
110 | ||
111 | /* The linker script knows the section names for placement. | |
112 | The entry_names are used to do simple name mangling on the stubs. | |
113 | Given a function name, and its type, the stub can be found. The | |
114 | name can be changed. The only requirement is the %s be present. | |
115 | */ | |
116 | ||
117 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" | |
118 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
119 | ||
120 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
121 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
122 | ||
123 | /* Used by the assembler. */ | |
124 | static bfd_reloc_status_type | |
125 | coff_arm_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
126 | error_message) | |
127 | bfd *abfd; | |
128 | arelent *reloc_entry; | |
129 | asymbol *symbol; | |
130 | PTR data; | |
131 | asection *input_section; | |
132 | bfd *output_bfd; | |
133 | char **error_message; | |
134 | { | |
135 | symvalue diff; | |
136 | if (output_bfd == (bfd *) NULL) | |
137 | return bfd_reloc_continue; | |
138 | ||
139 | diff = reloc_entry->addend; | |
140 | ||
141 | #define DOIT(x) \ | |
142 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) | |
143 | ||
144 | if (diff != 0) | |
145 | { | |
146 | reloc_howto_type *howto = reloc_entry->howto; | |
147 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
148 | ||
149 | switch (howto->size) | |
150 | { | |
151 | case 0: | |
152 | { | |
153 | char x = bfd_get_8 (abfd, addr); | |
154 | DOIT (x); | |
155 | bfd_put_8 (abfd, x, addr); | |
156 | } | |
157 | break; | |
158 | ||
159 | case 1: | |
160 | { | |
161 | short x = bfd_get_16 (abfd, addr); | |
162 | DOIT (x); | |
163 | bfd_put_16 (abfd, x, addr); | |
164 | } | |
165 | break; | |
166 | ||
167 | case 2: | |
168 | { | |
169 | long x = bfd_get_32 (abfd, addr); | |
170 | DOIT (x); | |
171 | bfd_put_32 (abfd, x, addr); | |
172 | } | |
173 | break; | |
174 | ||
175 | default: | |
176 | abort (); | |
177 | } | |
178 | } | |
179 | ||
180 | /* Now let bfd_perform_relocation finish everything up. */ | |
181 | return bfd_reloc_continue; | |
182 | } | |
183 | ||
184 | /* If USER_LABEL_PREFIX is defined as "_" (see coff_arm_is_local_label_name() | |
185 | in this file), then TARGET_UNDERSCORE should be defined, otherwise it | |
186 | should not. */ | |
187 | #ifndef TARGET_UNDERSCORE | |
188 | #define TARGET_UNDERSCORE '_' | |
189 | #endif | |
190 | ||
191 | #ifndef PCRELOFFSET | |
192 | #define PCRELOFFSET true | |
193 | #endif | |
194 | ||
195 | /* These most certainly belong somewhere else. Just had to get rid of | |
196 | the manifest constants in the code. */ | |
197 | ||
198 | #define ARM_8 0 | |
199 | #define ARM_16 1 | |
200 | #define ARM_32 2 | |
201 | #define ARM_26 3 | |
202 | #define ARM_DISP8 4 | |
203 | #define ARM_DISP16 5 | |
204 | #define ARM_DISP32 6 | |
205 | #define ARM_26D 7 | |
206 | /* 8 is unused */ | |
207 | #define ARM_NEG16 9 | |
208 | #define ARM_NEG32 10 | |
209 | #define ARM_RVA32 11 | |
210 | #define ARM_THUMB9 12 | |
211 | #define ARM_THUMB12 13 | |
212 | #define ARM_THUMB23 14 | |
213 | ||
214 | static reloc_howto_type aoutarm_std_reloc_howto[] = | |
215 | { | |
216 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
217 | HOWTO(ARM_8, /* type */ | |
218 | 0, /* rightshift */ | |
219 | 0, /* size */ | |
220 | 8, /* bitsize */ | |
221 | false, /* pc_relative */ | |
222 | 0, /* bitpos */ | |
223 | complain_overflow_bitfield, /* complain_on_overflow */ | |
224 | coff_arm_reloc, /* special_function */ | |
225 | "ARM_8", /* name */ | |
226 | true, /* partial_inplace */ | |
227 | 0x000000ff, /* src_mask */ | |
228 | 0x000000ff, /* dst_mask */ | |
229 | PCRELOFFSET /* pcrel_offset */), | |
230 | HOWTO(ARM_16, | |
231 | 0, | |
232 | 1, | |
233 | 16, | |
234 | false, | |
235 | 0, | |
236 | complain_overflow_bitfield, | |
237 | coff_arm_reloc, | |
238 | "ARM_16", | |
239 | true, | |
240 | 0x0000ffff, | |
241 | 0x0000ffff, | |
242 | PCRELOFFSET), | |
243 | HOWTO(ARM_32, | |
244 | 0, | |
245 | 2, | |
246 | 32, | |
247 | false, | |
248 | 0, | |
249 | complain_overflow_bitfield, | |
250 | coff_arm_reloc, | |
251 | "ARM_32", | |
252 | true, | |
253 | 0xffffffff, | |
254 | 0xffffffff, | |
255 | PCRELOFFSET), | |
256 | HOWTO(ARM_26, | |
257 | 2, | |
258 | 2, | |
259 | 24, | |
260 | true, | |
261 | 0, | |
262 | complain_overflow_signed, | |
263 | aoutarm_fix_pcrel_26 , | |
264 | "ARM_26", | |
265 | false, | |
266 | 0x00ffffff, | |
267 | 0x00ffffff, | |
268 | PCRELOFFSET), | |
269 | HOWTO(ARM_DISP8, | |
270 | 0, | |
271 | 0, | |
272 | 8, | |
273 | true, | |
274 | 0, | |
275 | complain_overflow_signed, | |
276 | coff_arm_reloc, | |
277 | "ARM_DISP8", | |
278 | true, | |
279 | 0x000000ff, | |
280 | 0x000000ff, | |
281 | true), | |
282 | HOWTO( ARM_DISP16, | |
283 | 0, | |
284 | 1, | |
285 | 16, | |
286 | true, | |
287 | 0, | |
288 | complain_overflow_signed, | |
289 | coff_arm_reloc, | |
290 | "ARM_DISP16", | |
291 | true, | |
292 | 0x0000ffff, | |
293 | 0x0000ffff, | |
294 | true), | |
295 | HOWTO( ARM_DISP32, | |
296 | 0, | |
297 | 2, | |
298 | 32, | |
299 | true, | |
300 | 0, | |
301 | complain_overflow_signed, | |
302 | coff_arm_reloc, | |
303 | "ARM_DISP32", | |
304 | true, | |
305 | 0xffffffff, | |
306 | 0xffffffff, | |
307 | true), | |
308 | HOWTO( ARM_26D, | |
309 | 2, | |
310 | 2, | |
311 | 24, | |
312 | false, | |
313 | 0, | |
314 | complain_overflow_dont, | |
315 | aoutarm_fix_pcrel_26_done, | |
316 | "ARM_26D", | |
317 | true, | |
318 | 0x00ffffff, | |
319 | 0x0, | |
320 | false), | |
321 | /* 8 is unused */ | |
322 | {-1}, | |
323 | HOWTO( ARM_NEG16, | |
324 | 0, | |
325 | -1, | |
326 | 16, | |
327 | false, | |
328 | 0, | |
329 | complain_overflow_bitfield, | |
330 | coff_arm_reloc, | |
331 | "ARM_NEG16", | |
332 | true, | |
333 | 0x0000ffff, | |
334 | 0x0000ffff, | |
335 | false), | |
336 | HOWTO( ARM_NEG32, | |
337 | 0, | |
338 | -2, | |
339 | 32, | |
340 | false, | |
341 | 0, | |
342 | complain_overflow_bitfield, | |
343 | coff_arm_reloc, | |
344 | "ARM_NEG32", | |
345 | true, | |
346 | 0xffffffff, | |
347 | 0xffffffff, | |
348 | false), | |
349 | HOWTO( ARM_RVA32, | |
350 | 0, | |
351 | 2, | |
352 | 32, | |
353 | false, | |
354 | 0, | |
355 | complain_overflow_bitfield, | |
356 | coff_arm_reloc, | |
357 | "ARM_RVA32", | |
358 | true, | |
359 | 0xffffffff, | |
360 | 0xffffffff, | |
361 | PCRELOFFSET), | |
362 | HOWTO( ARM_THUMB9, | |
363 | 1, | |
364 | 1, | |
365 | 8, | |
366 | true, | |
367 | 0, | |
368 | complain_overflow_signed, | |
369 | coff_thumb_pcrel_9 , | |
370 | "ARM_THUMB9", | |
371 | false, | |
372 | 0x000000ff, | |
373 | 0x000000ff, | |
374 | PCRELOFFSET), | |
375 | HOWTO( ARM_THUMB12, | |
376 | 1, | |
377 | 1, | |
378 | 11, | |
379 | true, | |
380 | 0, | |
381 | complain_overflow_signed, | |
382 | coff_thumb_pcrel_12 , | |
383 | "ARM_THUMB12", | |
384 | false, | |
385 | 0x000007ff, | |
386 | 0x000007ff, | |
387 | PCRELOFFSET), | |
388 | HOWTO( ARM_THUMB23, | |
389 | 1, | |
390 | 2, | |
391 | 22, | |
392 | true, | |
393 | 0, | |
394 | complain_overflow_signed, | |
395 | coff_thumb_pcrel_23 , | |
396 | "ARM_THUMB23", | |
397 | false, | |
398 | 0x07ff07ff, | |
399 | 0x07ff07ff, | |
400 | PCRELOFFSET), | |
401 | }; | |
402 | ||
403 | #ifdef COFF_WITH_PE | |
404 | /* Return true if this relocation should | |
405 | appear in the output .reloc section. */ | |
406 | ||
407 | static boolean | |
408 | in_reloc_p (abfd, howto) | |
409 | bfd * abfd; | |
410 | reloc_howto_type * howto; | |
411 | { | |
412 | return !howto->pc_relative && howto->type != ARM_RVA32; | |
413 | } | |
414 | #endif | |
415 | ||
416 | ||
417 | #define RTYPE2HOWTO(cache_ptr, dst) \ | |
418 | (cache_ptr)->howto = aoutarm_std_reloc_howto + (dst)->r_type; | |
419 | ||
420 | #define coff_rtype_to_howto coff_arm_rtype_to_howto | |
421 | ||
422 | static reloc_howto_type * | |
423 | coff_arm_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
424 | bfd *abfd; | |
425 | asection *sec; | |
426 | struct internal_reloc *rel; | |
427 | struct coff_link_hash_entry *h; | |
428 | struct internal_syment *sym; | |
429 | bfd_vma *addendp; | |
430 | { | |
431 | reloc_howto_type *howto; | |
432 | ||
433 | howto = aoutarm_std_reloc_howto + rel->r_type; | |
434 | ||
435 | if (rel->r_type == ARM_RVA32) | |
436 | { | |
437 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; | |
438 | } | |
439 | ||
440 | return howto; | |
441 | ||
442 | } | |
443 | /* Used by the assembler. */ | |
444 | ||
445 | static bfd_reloc_status_type | |
446 | aoutarm_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section, | |
447 | output_bfd, error_message) | |
448 | bfd *abfd; | |
449 | arelent *reloc_entry; | |
450 | asymbol *symbol; | |
451 | PTR data; | |
452 | asection *input_section; | |
453 | bfd *output_bfd; | |
454 | char **error_message; | |
455 | { | |
456 | /* This is dead simple at present. */ | |
457 | return bfd_reloc_ok; | |
458 | } | |
459 | ||
460 | /* Used by the assembler. */ | |
461 | ||
462 | static bfd_reloc_status_type | |
463 | aoutarm_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section, | |
464 | output_bfd, error_message) | |
465 | bfd *abfd; | |
466 | arelent *reloc_entry; | |
467 | asymbol *symbol; | |
468 | PTR data; | |
469 | asection *input_section; | |
470 | bfd *output_bfd; | |
471 | char **error_message; | |
472 | { | |
473 | bfd_vma relocation; | |
474 | bfd_size_type addr = reloc_entry->address; | |
475 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
476 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
477 | ||
478 | /* If this is an undefined symbol, return error */ | |
479 | if (symbol->section == &bfd_und_section | |
480 | && (symbol->flags & BSF_WEAK) == 0) | |
481 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
482 | ||
483 | /* If the sections are different, and we are doing a partial relocation, | |
484 | just ignore it for now. */ | |
485 | if (symbol->section->name != input_section->name | |
486 | && output_bfd != (bfd *)NULL) | |
487 | return bfd_reloc_continue; | |
488 | ||
489 | relocation = (target & 0x00ffffff) << 2; | |
490 | relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */ | |
491 | relocation += symbol->value; | |
492 | relocation += symbol->section->output_section->vma; | |
493 | relocation += symbol->section->output_offset; | |
494 | relocation += reloc_entry->addend; | |
495 | relocation -= input_section->output_section->vma; | |
496 | relocation -= input_section->output_offset; | |
497 | relocation -= addr; | |
498 | ||
499 | if (relocation & 3) | |
500 | return bfd_reloc_overflow; | |
501 | ||
502 | /* Check for overflow */ | |
503 | if (relocation & 0x02000000) | |
504 | { | |
505 | if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff) | |
506 | flag = bfd_reloc_overflow; | |
507 | } | |
508 | else if (relocation & ~0x03ffffff) | |
509 | flag = bfd_reloc_overflow; | |
510 | ||
511 | target &= ~0x00ffffff; | |
512 | target |= (relocation >> 2) & 0x00ffffff; | |
513 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); | |
514 | ||
515 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
516 | Strictly this is only necessary if we are doing a partial relocation. */ | |
517 | reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D]; | |
518 | ||
519 | return flag; | |
520 | } | |
521 | ||
522 | static bfd_reloc_status_type | |
523 | coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, input_section, | |
524 | output_bfd, error_message, btype) | |
525 | bfd *abfd; | |
526 | arelent *reloc_entry; | |
527 | asymbol *symbol; | |
528 | PTR data; | |
529 | asection *input_section; | |
530 | bfd *output_bfd; | |
531 | char **error_message; | |
532 | thumb_pcrel_branchtype btype; | |
533 | { | |
534 | bfd_vma relocation = 0; | |
535 | bfd_size_type addr = reloc_entry->address; | |
536 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
537 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
538 | bfd_vma dstmsk; | |
539 | bfd_vma offmsk; | |
540 | bfd_vma signbit; | |
541 | ||
542 | /* NOTE: This routine is currently used by GAS, but not by the link | |
543 | phase. */ | |
544 | ||
545 | switch (btype) | |
546 | { | |
547 | case b9: | |
548 | dstmsk = 0x000000ff; | |
549 | offmsk = 0x000001fe; | |
550 | signbit = 0x00000100; | |
551 | break; | |
552 | ||
553 | case b12: | |
554 | dstmsk = 0x000007ff; | |
555 | offmsk = 0x00000ffe; | |
556 | signbit = 0x00000800; | |
557 | break; | |
558 | ||
559 | case b23: | |
560 | dstmsk = 0x07ff07ff; | |
561 | offmsk = 0x007fffff; | |
562 | signbit = 0x00400000; | |
563 | break; | |
564 | ||
565 | default: | |
566 | abort (); | |
567 | } | |
568 | ||
569 | /* If this is an undefined symbol, return error */ | |
570 | if (symbol->section == &bfd_und_section | |
571 | && (symbol->flags & BSF_WEAK) == 0) | |
572 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
573 | ||
574 | /* If the sections are different, and we are doing a partial relocation, | |
575 | just ignore it for now. */ | |
576 | if (symbol->section->name != input_section->name | |
577 | && output_bfd != (bfd *)NULL) | |
578 | return bfd_reloc_continue; | |
579 | ||
580 | switch (btype) | |
581 | { | |
582 | case b9: | |
583 | case b12: | |
584 | relocation = ((target & dstmsk) << 1); | |
585 | break; | |
586 | ||
587 | case b23: | |
588 | if (bfd_big_endian (abfd)) | |
589 | relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4); | |
590 | else | |
591 | relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15); | |
592 | break; | |
593 | ||
594 | default: | |
595 | abort (); | |
596 | } | |
597 | ||
598 | relocation = (relocation ^ signbit) - signbit; /* Sign extend */ | |
599 | relocation += symbol->value; | |
600 | relocation += symbol->section->output_section->vma; | |
601 | relocation += symbol->section->output_offset; | |
602 | relocation += reloc_entry->addend; | |
603 | relocation -= input_section->output_section->vma; | |
604 | relocation -= input_section->output_offset; | |
605 | relocation -= addr; | |
606 | ||
607 | if (relocation & 1) | |
608 | return bfd_reloc_overflow; | |
609 | ||
610 | /* Check for overflow */ | |
611 | if (relocation & signbit) | |
612 | { | |
613 | if ((relocation & ~offmsk) != ~offmsk) | |
614 | flag = bfd_reloc_overflow; | |
615 | } | |
616 | else if (relocation & ~offmsk) | |
617 | flag = bfd_reloc_overflow; | |
618 | ||
619 | target &= ~dstmsk; | |
620 | switch (btype) | |
621 | { | |
622 | case b9: | |
623 | case b12: | |
624 | target |= (relocation >> 1); | |
625 | break; | |
626 | ||
627 | case b23: | |
628 | if (bfd_big_endian (abfd)) | |
629 | target |= ((relocation & 0xfff) >> 1) | ((relocation << 4) & 0x07ff0000); | |
630 | else | |
631 | target |= ((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff); | |
632 | break; | |
633 | ||
634 | default: | |
635 | abort (); | |
636 | } | |
637 | ||
638 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); | |
639 | ||
640 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
641 | Strictly this is only necessary if we are doing a partial relocation. */ | |
642 | reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D]; | |
643 | ||
644 | /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations */ | |
645 | return flag; | |
646 | } | |
647 | ||
648 | static bfd_reloc_status_type | |
649 | coff_thumb_pcrel_23 (abfd, reloc_entry, symbol, data, input_section, | |
650 | output_bfd, error_message) | |
651 | bfd *abfd; | |
652 | arelent *reloc_entry; | |
653 | asymbol *symbol; | |
654 | PTR data; | |
655 | asection *input_section; | |
656 | bfd *output_bfd; | |
657 | char **error_message; | |
658 | { | |
659 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
660 | input_section, output_bfd, error_message, b23); | |
661 | } | |
662 | ||
663 | static bfd_reloc_status_type | |
664 | coff_thumb_pcrel_12 (abfd, reloc_entry, symbol, data, input_section, | |
665 | output_bfd, error_message) | |
666 | bfd *abfd; | |
667 | arelent *reloc_entry; | |
668 | asymbol *symbol; | |
669 | PTR data; | |
670 | asection *input_section; | |
671 | bfd *output_bfd; | |
672 | char **error_message; | |
673 | { | |
674 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
675 | input_section, output_bfd, error_message, b12); | |
676 | } | |
677 | ||
678 | static bfd_reloc_status_type | |
679 | coff_thumb_pcrel_9 (abfd, reloc_entry, symbol, data, input_section, | |
680 | output_bfd, error_message) | |
681 | bfd *abfd; | |
682 | arelent *reloc_entry; | |
683 | asymbol *symbol; | |
684 | PTR data; | |
685 | asection *input_section; | |
686 | bfd *output_bfd; | |
687 | char **error_message; | |
688 | { | |
689 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
690 | input_section, output_bfd, error_message, b9); | |
691 | } | |
692 | ||
693 | ||
694 | static CONST struct reloc_howto_struct * | |
695 | coff_arm_reloc_type_lookup (abfd, code) | |
696 | bfd * abfd; | |
697 | bfd_reloc_code_real_type code; | |
698 | { | |
699 | #define ASTD(i,j) case i: return &aoutarm_std_reloc_howto[j] | |
700 | if (code == BFD_RELOC_CTOR) | |
701 | switch (bfd_get_arch_info (abfd)->bits_per_address) | |
702 | { | |
703 | case 32: | |
704 | code = BFD_RELOC_32; | |
705 | break; | |
706 | default: return (CONST struct reloc_howto_struct *) 0; | |
707 | } | |
708 | ||
709 | switch (code) | |
710 | { | |
711 | ASTD (BFD_RELOC_8, ARM_8); | |
712 | ASTD (BFD_RELOC_16, ARM_16); | |
713 | ASTD (BFD_RELOC_32, ARM_32); | |
714 | ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26); | |
715 | ASTD (BFD_RELOC_8_PCREL, ARM_DISP8); | |
716 | ASTD (BFD_RELOC_16_PCREL, ARM_DISP16); | |
717 | ASTD (BFD_RELOC_32_PCREL, ARM_DISP32); | |
718 | ASTD (BFD_RELOC_RVA, ARM_RVA32); | |
719 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9); | |
720 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12); | |
721 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23); | |
722 | default: return (CONST struct reloc_howto_struct *) 0; | |
723 | } | |
724 | } | |
725 | ||
726 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) | |
727 | #define COFF_PAGE_SIZE 0x1000 | |
728 | /* Turn a howto into a reloc nunmber */ | |
729 | ||
730 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
731 | #define BADMAG(x) ARMBADMAG(x) | |
732 | #define ARM 1 /* Customize coffcode.h */ | |
733 | ||
734 | /* Extend the coff_link_hash_table structure with a few ARM specific fields. | |
735 | This allows us to store global data here without actually creating any | |
736 | global variables, which is a no-no in the BFD world. */ | |
737 | struct coff_arm_link_hash_table | |
738 | { | |
739 | /* The original coff_link_hash_table structure. MUST be first field. */ | |
740 | struct coff_link_hash_table root; | |
741 | ||
742 | /* The size in bytes of the section containg the Thumb-to-ARM glue. */ | |
743 | long int thumb_glue_size; | |
744 | ||
745 | /* The size in bytes of the section containg the ARM-to-Thumb glue. */ | |
746 | long int arm_glue_size; | |
747 | ||
748 | /* An arbitary input BFD chosen to hold the glue sections. */ | |
749 | bfd * bfd_of_glue_owner; | |
750 | ||
751 | /* Support interworking with old, non-interworking aware ARM code. */ | |
752 | int support_old_code; | |
753 | }; | |
754 | ||
755 | /* Get the ARM coff linker hash table from a link_info structure. */ | |
756 | #define coff_arm_hash_table(info) \ | |
757 | ((struct coff_arm_link_hash_table *) ((info)->hash)) | |
758 | ||
759 | /* Create an ARM coff linker hash table. */ | |
760 | ||
761 | static struct bfd_link_hash_table * | |
762 | coff_arm_link_hash_table_create (abfd) | |
763 | bfd * abfd; | |
764 | { | |
765 | struct coff_arm_link_hash_table * ret; | |
766 | ||
767 | ret = ((struct coff_arm_link_hash_table *) | |
768 | bfd_alloc (abfd, sizeof (struct coff_arm_link_hash_table))); | |
769 | if (ret == (struct coff_arm_link_hash_table *) NULL) | |
770 | return NULL; | |
771 | ||
772 | if (! _bfd_coff_link_hash_table_init | |
773 | (& ret->root, abfd, _bfd_coff_link_hash_newfunc)) | |
774 | { | |
775 | bfd_release (abfd, ret); | |
776 | return (struct bfd_link_hash_table *) NULL; | |
777 | } | |
778 | ||
779 | ret->thumb_glue_size = 0; | |
780 | ret->arm_glue_size = 0; | |
781 | ret->bfd_of_glue_owner = NULL; | |
782 | ||
783 | return & ret->root.root; | |
784 | } | |
785 | ||
786 | static | |
787 | arm_emit_base_file_entry (info, output_bfd, input_section, reloc_offset) | |
788 | struct bfd_link_info *info; | |
789 | bfd *output_bfd; | |
790 | asection *input_section; | |
791 | bfd_vma reloc_offset; | |
792 | { | |
793 | bfd_vma addr = reloc_offset | |
794 | - input_section->vma | |
795 | + input_section->output_offset | |
796 | + input_section->output_section->vma; | |
797 | ||
798 | if (coff_data(output_bfd)->pe) | |
799 | addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; | |
800 | fwrite (&addr, 1, sizeof (addr), (FILE *) info->base_file); | |
801 | ||
802 | } | |
803 | \f | |
804 | /* The thumb form of a long branch is a bit finicky, because the offset | |
805 | encoding is split over two fields, each in it's own instruction. They | |
806 | can occur in any order. So given a thumb form of long branch, and an | |
807 | offset, insert the offset into the thumb branch and return finished | |
808 | instruction. | |
809 | ||
810 | It takes two thumb instructions to encode the target address. Each has | |
811 | 11 bits to invest. The upper 11 bits are stored in one (identifed by | |
812 | H-0.. see below), the lower 11 bits are stored in the other (identified | |
813 | by H-1). | |
814 | ||
815 | Combine together and shifted left by 1 (it's a half word address) and | |
816 | there you have it. | |
817 | ||
818 | Op: 1111 = F, | |
819 | H-0, upper address-0 = 000 | |
820 | Op: 1111 = F, | |
821 | H-1, lower address-0 = 800 | |
822 | ||
823 | They can be ordered either way, but the arm tools I've seen always put | |
824 | the lower one first. It probably doesn't matter. krk@cygnus.com | |
825 | ||
826 | XXX: Actually the order does matter. The second instruction (H-1) | |
827 | moves the computed address into the PC, so it must be the second one | |
828 | in the sequence. The problem, however is that whilst little endian code | |
829 | stores the instructions in HI then LOW order, big endian code does the | |
830 | reverse. nickc@cygnus.com */ | |
831 | ||
832 | #define LOW_HI_ORDER 0xF800F000 | |
833 | #define HI_LOW_ORDER 0xF000F800 | |
834 | ||
835 | static insn32 | |
836 | insert_thumb_branch (br_insn, rel_off) | |
837 | insn32 br_insn; | |
838 | int rel_off; | |
839 | { | |
840 | unsigned int low_bits; | |
841 | unsigned int high_bits; | |
842 | ||
843 | ||
844 | BFD_ASSERT((rel_off & 1) != 1); | |
845 | ||
846 | rel_off >>= 1; /* half word aligned address */ | |
847 | low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */ | |
848 | high_bits = (rel_off >> 11) & 0x000007FF; /* the top 11 bits */ | |
849 | ||
850 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
851 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
852 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
853 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
854 | else | |
855 | abort(); /* error - not a valid branch instruction form */ | |
856 | ||
857 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ | |
858 | ||
859 | return br_insn; | |
860 | } | |
861 | ||
862 | \f | |
863 | static struct coff_link_hash_entry * | |
864 | find_thumb_glue (info, name, input_bfd) | |
865 | struct bfd_link_info * info; | |
866 | CONST char * name; | |
867 | bfd * input_bfd; | |
868 | { | |
869 | char * tmp_name; | |
870 | struct coff_link_hash_entry * myh; | |
871 | ||
872 | tmp_name = ((char *) | |
873 | bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1)); | |
874 | ||
875 | BFD_ASSERT (tmp_name); | |
876 | ||
877 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
878 | ||
879 | myh = coff_link_hash_lookup | |
880 | (coff_hash_table (info), tmp_name, false, false, true); | |
881 | ||
882 | if (myh == NULL) | |
883 | /* xgettext:c-format */ | |
884 | _bfd_error_handler (_("%s: unable to find THUMB glue '%s' for `%s'"), | |
885 | bfd_get_filename (input_bfd), tmp_name, name); | |
886 | ||
887 | free (tmp_name); | |
888 | ||
889 | return myh; | |
890 | } | |
891 | ||
892 | static struct coff_link_hash_entry * | |
893 | find_arm_glue (info, name, input_bfd) | |
894 | struct bfd_link_info * info; | |
895 | CONST char * name; | |
896 | bfd * input_bfd; | |
897 | { | |
898 | char * tmp_name; | |
899 | struct coff_link_hash_entry * myh; | |
900 | ||
901 | tmp_name = ((char *) | |
902 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
903 | ||
904 | BFD_ASSERT (tmp_name); | |
905 | ||
906 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
907 | ||
908 | myh = coff_link_hash_lookup | |
909 | (coff_hash_table (info), tmp_name, false, false, true); | |
910 | ||
911 | if (myh == NULL) | |
912 | /* xgettext:c-format */ | |
913 | _bfd_error_handler (_("%s: unable to find ARM glue '%s' for `%s'"), | |
914 | bfd_get_filename (input_bfd), tmp_name, name); | |
915 | ||
916 | free (tmp_name); | |
917 | ||
918 | return myh; | |
919 | } | |
920 | ||
921 | /* | |
922 | ARM->Thumb glue: | |
923 | ||
924 | .arm | |
925 | __func_from_arm: | |
926 | ldr r12, __func_addr | |
927 | bx r12 | |
928 | __func_addr: | |
929 | .word func @ behave as if you saw a ARM_32 reloc | |
930 | */ | |
931 | ||
932 | #define ARM2THUMB_GLUE_SIZE 12 | |
933 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
934 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
935 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
936 | ||
252b5132 RH |
937 | /* |
938 | Thumb->ARM: Thumb->(non-interworking aware) ARM | |
939 | ||
940 | .thumb .thumb | |
941 | .align 2 .align 2 | |
942 | __func_from_thumb: __func_from_thumb: | |
943 | bx pc push {r6, lr} | |
944 | nop ldr r6, __func_addr | |
945 | .arm mov lr, pc | |
946 | __func_change_to_arm: bx r6 | |
947 | b func .arm | |
948 | __func_back_to_thumb: | |
949 | ldmia r13! {r6, lr} | |
950 | bx lr | |
951 | __func_addr: | |
952 | .word func | |
953 | */ | |
954 | ||
955 | #define THUMB2ARM_GLUE_SIZE (globals->support_old_code ? 20 : 8) | |
956 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
957 | static const insn16 t2a2_noop_insn = 0x46c0; | |
958 | static const insn32 t2a3_b_insn = 0xea000000; | |
959 | ||
252b5132 RH |
960 | static const insn16 t2a1_push_insn = 0xb540; |
961 | static const insn16 t2a2_ldr_insn = 0x4e03; | |
962 | static const insn16 t2a3_mov_insn = 0x46fe; | |
963 | static const insn16 t2a4_bx_insn = 0x4730; | |
964 | static const insn32 t2a5_pop_insn = 0xe8bd4040; | |
965 | static const insn32 t2a6_bx_insn = 0xe12fff1e; | |
966 | ||
967 | /* TODO: | |
968 | We should really create new local (static) symbols in destination | |
969 | object for each stub we create. We should also create local | |
970 | (static) symbols within the stubs when switching between ARM and | |
971 | Thumb code. This will ensure that the debugger and disassembler | |
972 | can present a better view of stubs. | |
973 | ||
974 | We can treat stubs like literal sections, and for the THUMB9 ones | |
975 | (short addressing range) we should be able to insert the stubs | |
976 | between sections. i.e. the simplest approach (since relocations | |
977 | are done on a section basis) is to dump the stubs at the end of | |
978 | processing a section. That way we can always try and minimise the | |
979 | offset to and from a stub. However, this does not map well onto | |
980 | the way that the linker/BFD does its work: mapping all input | |
981 | sections to output sections via the linker script before doing | |
982 | all the processing. | |
983 | ||
984 | Unfortunately it may be easier to just to disallow short range | |
985 | Thumb->ARM stubs (i.e. no conditional inter-working branches, | |
986 | only branch-and-link (BL) calls. This will simplify the processing | |
987 | since we can then put all of the stubs into their own section. | |
988 | ||
989 | TODO: | |
990 | On a different subject, rather than complaining when a | |
991 | branch cannot fit in the number of bits available for the | |
992 | instruction we should generate a trampoline stub (needed to | |
993 | address the complete 32bit address space). */ | |
994 | ||
995 | /* The standard COFF backend linker does not cope with the special | |
996 | Thumb BRANCH23 relocation. The alternative would be to split the | |
997 | BRANCH23 into seperate HI23 and LO23 relocations. However, it is a | |
998 | bit simpler simply providing our own relocation driver. */ | |
999 | ||
1000 | /* The reloc processing routine for the ARM/Thumb COFF linker. NOTE: | |
1001 | This code is a very slightly modified copy of | |
1002 | _bfd_coff_generic_relocate_section. It would be a much more | |
1003 | maintainable solution to have a MACRO that could be expanded within | |
1004 | _bfd_coff_generic_relocate_section that would only be provided for | |
1005 | ARM/Thumb builds. It is only the code marked THUMBEXTENSION that | |
1006 | is different from the original. */ | |
1007 | ||
1008 | static boolean | |
1009 | coff_arm_relocate_section (output_bfd, info, input_bfd, input_section, | |
1010 | contents, relocs, syms, sections) | |
1011 | bfd *output_bfd; | |
1012 | struct bfd_link_info *info; | |
1013 | bfd *input_bfd; | |
1014 | asection *input_section; | |
1015 | bfd_byte *contents; | |
1016 | struct internal_reloc *relocs; | |
1017 | struct internal_syment *syms; | |
1018 | asection **sections; | |
1019 | { | |
1020 | struct internal_reloc * rel; | |
1021 | struct internal_reloc * relend; | |
1022 | ||
1023 | rel = relocs; | |
1024 | relend = rel + input_section->reloc_count; | |
1025 | ||
1026 | for (; rel < relend; rel++) | |
1027 | { | |
1028 | int done = 0; | |
1029 | long symndx; | |
1030 | struct coff_link_hash_entry * h; | |
1031 | struct internal_syment * sym; | |
1032 | bfd_vma addend; | |
1033 | bfd_vma val; | |
1034 | reloc_howto_type * howto; | |
1035 | bfd_reloc_status_type rstat; | |
1036 | bfd_vma h_val; | |
1037 | ||
1038 | symndx = rel->r_symndx; | |
1039 | ||
1040 | if (symndx == -1) | |
1041 | { | |
1042 | h = NULL; | |
1043 | sym = NULL; | |
1044 | } | |
1045 | else | |
1046 | { | |
1047 | h = obj_coff_sym_hashes (input_bfd)[symndx]; | |
1048 | sym = syms + symndx; | |
1049 | } | |
1050 | ||
1051 | /* COFF treats common symbols in one of two ways. Either the | |
1052 | size of the symbol is included in the section contents, or it | |
1053 | is not. We assume that the size is not included, and force | |
1054 | the rtype_to_howto function to adjust the addend as needed. */ | |
1055 | ||
1056 | if (sym != NULL && sym->n_scnum != 0) | |
1057 | addend = - sym->n_value; | |
1058 | else | |
1059 | addend = 0; | |
1060 | ||
1061 | ||
1062 | howto = coff_rtype_to_howto (input_bfd, input_section, rel, h, | |
1063 | sym, &addend); | |
1064 | if (howto == NULL) | |
1065 | return false; | |
1066 | ||
1067 | /* The relocation_section function will skip pcrel_offset relocs | |
1068 | when doing a relocateable link. However, we want to convert | |
1069 | ARM26 to ARM26D relocs if possible. We return a fake howto in | |
1070 | this case without pcrel_offset set, and adjust the addend to | |
1071 | compensate. */ | |
1072 | if (rel->r_type == ARM_26 | |
1073 | && h != NULL | |
1074 | && info->relocateable | |
1075 | && (h->root.type == bfd_link_hash_defined | |
1076 | || h->root.type == bfd_link_hash_defweak) | |
1077 | && h->root.u.def.section->output_section == input_section->output_section) | |
1078 | { | |
1079 | static reloc_howto_type fake_arm26_reloc = | |
1080 | HOWTO (ARM_26, | |
1081 | 2, | |
1082 | 2, | |
1083 | 24, | |
1084 | true, | |
1085 | 0, | |
1086 | complain_overflow_signed, | |
1087 | aoutarm_fix_pcrel_26 , | |
1088 | "ARM_26", | |
1089 | false, | |
1090 | 0x00ffffff, | |
1091 | 0x00ffffff, | |
1092 | false); | |
1093 | ||
1094 | addend -= rel->r_vaddr - input_section->vma; | |
1095 | howto = &fake_arm26_reloc; | |
1096 | } | |
1097 | ||
1098 | /* If we are doing a relocateable link, then we can just ignore | |
1099 | a PC relative reloc that is pcrel_offset. It will already | |
1100 | have the correct value. If this is not a relocateable link, | |
1101 | then we should ignore the symbol value. */ | |
1102 | if (howto->pc_relative && howto->pcrel_offset) | |
1103 | { | |
1104 | if (info->relocateable) | |
1105 | continue; | |
1106 | if (sym != NULL && sym->n_scnum != 0) | |
1107 | addend += sym->n_value; | |
1108 | } | |
1109 | ||
1110 | val = 0; | |
1111 | ||
1112 | if (h == NULL) | |
1113 | { | |
1114 | asection *sec; | |
1115 | ||
1116 | if (symndx == -1) | |
1117 | { | |
1118 | sec = bfd_abs_section_ptr; | |
1119 | val = 0; | |
1120 | } | |
1121 | else | |
1122 | { | |
1123 | sec = sections[symndx]; | |
1124 | val = (sec->output_section->vma | |
1125 | + sec->output_offset | |
1126 | + sym->n_value | |
1127 | - sec->vma); | |
1128 | } | |
1129 | } | |
1130 | else | |
1131 | { | |
1132 | #if 1 /* THUMBEXTENSION */ | |
1133 | /* We don't output the stubs if we are generating a | |
1134 | relocatable output file, since we may as well leave the | |
1135 | stub generation to the final linker pass. If we fail to | |
1136 | verify that the name is defined, we'll try to build stubs | |
1137 | for an undefined name... */ | |
1138 | if (! info->relocateable | |
1139 | && ( h->root.type == bfd_link_hash_defined | |
1140 | || h->root.type == bfd_link_hash_defweak)) | |
1141 | { | |
1142 | asection * h_sec = h->root.u.def.section; | |
1143 | const char * name = h->root.root.string; | |
1144 | ||
1145 | /* h locates the symbol referenced in the reloc. */ | |
1146 | h_val = (h->root.u.def.value | |
1147 | + h_sec->output_section->vma | |
1148 | + h_sec->output_offset); | |
1149 | ||
1150 | if (howto->type == ARM_26) | |
1151 | { | |
1152 | if ( h->class == C_THUMBSTATFUNC | |
1153 | || h->class == C_THUMBEXTFUNC) | |
1154 | { | |
1155 | /* Arm code calling a Thumb function */ | |
1156 | unsigned long int tmp; | |
1157 | long int my_offset; | |
1158 | asection * s; | |
1159 | long int ret_offset; | |
1160 | struct coff_link_hash_entry * myh; | |
1161 | struct coff_arm_link_hash_table * globals; | |
1162 | ||
1163 | myh = find_arm_glue (info, name, input_bfd); | |
1164 | if (myh == NULL) | |
1165 | return false; | |
1166 | ||
1167 | globals = coff_arm_hash_table (info); | |
1168 | ||
1169 | BFD_ASSERT (globals != NULL); | |
1170 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1171 | ||
1172 | my_offset = myh->root.u.def.value; | |
1173 | ||
1174 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1175 | ARM2THUMB_GLUE_SECTION_NAME); | |
1176 | BFD_ASSERT (s != NULL); | |
1177 | BFD_ASSERT (s->contents != NULL); | |
1178 | BFD_ASSERT (s->output_section != NULL); | |
1179 | ||
1180 | if ((my_offset & 0x01) == 0x01) | |
1181 | { | |
1182 | if (h_sec->owner != NULL | |
1183 | && INTERWORK_SET (h_sec->owner) | |
1184 | && ! INTERWORK_FLAG (h_sec->owner)) | |
1185 | { | |
1186 | _bfd_error_handler | |
1187 | /* xgettext:c-format */ | |
1188 | (_("%s(%s): warning: interworking not enabled."), | |
1189 | bfd_get_filename (h_sec->owner), name); | |
1190 | _bfd_error_handler | |
1191 | /* xgettext:c-format */ | |
1192 | (_(" first occurrence: %s: arm call to thumb"), | |
1193 | bfd_get_filename (input_bfd)); | |
1194 | } | |
1195 | ||
1196 | --my_offset; | |
1197 | myh->root.u.def.value = my_offset; | |
1198 | ||
1199 | bfd_put_32 (output_bfd, a2t1_ldr_insn, | |
1200 | s->contents + my_offset); | |
1201 | ||
1202 | bfd_put_32 (output_bfd, a2t2_bx_r12_insn, | |
1203 | s->contents + my_offset + 4); | |
1204 | ||
1205 | /* It's a thumb address. Add the low order bit. */ | |
1206 | bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn, | |
1207 | s->contents + my_offset + 8); | |
1208 | ||
1209 | if (info->base_file) | |
1ceea514 | 1210 | arm_emit_base_file_entry (info, output_bfd, s, |
fa0e42e4 | 1211 | my_offset + 8); |
252b5132 RH |
1212 | |
1213 | } | |
1214 | ||
1215 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
1216 | ||
1217 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr | |
1218 | - input_section->vma); | |
1219 | ||
1220 | tmp = tmp & 0xFF000000; | |
1221 | ||
1222 | /* Somehow these are both 4 too far, so subtract 8. */ | |
1223 | ret_offset = | |
1224 | s->output_offset | |
1225 | + my_offset | |
1226 | + s->output_section->vma | |
1227 | - (input_section->output_offset | |
1228 | + input_section->output_section->vma | |
1229 | + rel->r_vaddr) | |
1230 | - 8; | |
1231 | ||
1232 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); | |
1233 | ||
1234 | bfd_put_32 (output_bfd, tmp, contents + rel->r_vaddr | |
1235 | - input_section->vma); | |
252b5132 RH |
1236 | done = 1; |
1237 | } | |
1238 | } | |
1239 | ||
1240 | /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12 */ | |
1241 | else if (howto->type == ARM_THUMB23) | |
1242 | { | |
1243 | if ( h->class == C_EXT | |
1244 | || h->class == C_STAT | |
1245 | || h->class == C_LABEL) | |
1246 | { | |
1247 | /* Thumb code calling an ARM function */ | |
1248 | asection * s = 0; | |
1249 | long int my_offset; | |
1250 | unsigned long int tmp; | |
1251 | long int ret_offset; | |
1252 | struct coff_link_hash_entry * myh; | |
1253 | struct coff_arm_link_hash_table * globals; | |
1254 | ||
1255 | myh = find_thumb_glue (info, name, input_bfd); | |
1256 | if (myh == NULL) | |
1257 | return false; | |
1258 | ||
1259 | globals = coff_arm_hash_table (info); | |
1260 | ||
1261 | BFD_ASSERT (globals != NULL); | |
1262 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1263 | ||
1264 | my_offset = myh->root.u.def.value; | |
1265 | ||
1266 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1267 | THUMB2ARM_GLUE_SECTION_NAME); | |
1268 | ||
1269 | BFD_ASSERT (s != NULL); | |
1270 | BFD_ASSERT (s->contents != NULL); | |
1271 | BFD_ASSERT (s->output_section != NULL); | |
1272 | ||
1273 | if ((my_offset & 0x01) == 0x01) | |
1274 | { | |
1275 | if (h_sec->owner != NULL | |
1276 | && INTERWORK_SET (h_sec->owner) | |
1277 | && ! INTERWORK_FLAG (h_sec->owner) | |
1278 | && ! globals->support_old_code) | |
1279 | { | |
1280 | _bfd_error_handler | |
1281 | /* xgettext:c-format */ | |
1282 | (_("%s(%s): warning: interworking not enabled."), | |
1283 | bfd_get_filename (h_sec->owner), name); | |
1284 | _bfd_error_handler | |
1285 | /* xgettext:c-format */ | |
1286 | (_(" first occurrence: %s: thumb call to arm"), | |
1287 | bfd_get_filename (input_bfd)); | |
1288 | _bfd_error_handler | |
1289 | (_(" consider relinking with --support-old-code enabled")); | |
1290 | } | |
1291 | ||
1292 | -- my_offset; | |
1293 | myh->root.u.def.value = my_offset; | |
1294 | ||
1295 | if (globals->support_old_code) | |
1296 | { | |
1297 | bfd_put_16 (output_bfd, t2a1_push_insn, | |
1298 | s->contents + my_offset); | |
1299 | ||
1300 | bfd_put_16 (output_bfd, t2a2_ldr_insn, | |
1301 | s->contents + my_offset + 2); | |
1302 | ||
1303 | bfd_put_16 (output_bfd, t2a3_mov_insn, | |
1304 | s->contents + my_offset + 4); | |
1305 | ||
1306 | bfd_put_16 (output_bfd, t2a4_bx_insn, | |
1307 | s->contents + my_offset + 6); | |
1308 | ||
1309 | bfd_put_32 (output_bfd, t2a5_pop_insn, | |
1310 | s->contents + my_offset + 8); | |
1311 | ||
1312 | bfd_put_32 (output_bfd, t2a6_bx_insn, | |
1313 | s->contents + my_offset + 12); | |
1314 | ||
1315 | /* Store the address of the function in the last word of the stub. */ | |
1316 | bfd_put_32 (output_bfd, h_val, | |
1317 | s->contents + my_offset + 16); | |
fa0e42e4 CM |
1318 | |
1319 | if (info->base_file) | |
1320 | arm_emit_base_file_entry (info, output_bfd, s, my_offset + 16); | |
252b5132 RH |
1321 | } |
1322 | else | |
1323 | { | |
1324 | bfd_put_16 (output_bfd, t2a1_bx_pc_insn, | |
1325 | s->contents + my_offset); | |
1326 | ||
1327 | bfd_put_16 (output_bfd, t2a2_noop_insn, | |
1328 | s->contents + my_offset + 2); | |
1329 | ||
1330 | ret_offset = | |
1331 | ((bfd_signed_vma) h_val) /* Address of destination of the stub */ | |
1332 | - ((bfd_signed_vma) | |
1333 | (s->output_offset /* Offset from the start of the current section to the start of the stubs. */ | |
1334 | + my_offset /* Offset of the start of this stub from the start of the stubs. */ | |
1335 | + s->output_section->vma) /* Address of the start of the current section. */ | |
1336 | + 4 /* The branch instruction is 4 bytes into the stub. */ | |
1337 | + 8); /* ARM branches work from the pc of the instruction + 8. */ | |
1338 | ||
1339 | bfd_put_32 (output_bfd, | |
1340 | t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), | |
1341 | s->contents + my_offset + 4); | |
1342 | ||
252b5132 RH |
1343 | } |
1344 | } | |
1345 | ||
1346 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
1347 | ||
1348 | /* Now go back and fix up the original BL insn to point | |
1349 | to here. */ | |
1350 | ret_offset = | |
1351 | s->output_offset | |
1352 | + my_offset | |
1353 | - (input_section->output_offset | |
1354 | + rel->r_vaddr) | |
1355 | -4; | |
1356 | ||
1357 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr | |
1358 | - input_section->vma); | |
1359 | ||
1360 | bfd_put_32 (output_bfd, | |
1361 | insert_thumb_branch (tmp, ret_offset), | |
1362 | contents + rel->r_vaddr | |
1363 | - input_section->vma); | |
1364 | ||
252b5132 RH |
1365 | done = 1; |
1366 | } | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | /* If the relocation type and destination symbol does not | |
1371 | fall into one of the above categories, then we can just | |
1372 | perform a direct link. */ | |
1373 | ||
1374 | if (done) | |
1375 | rstat = bfd_reloc_ok; | |
1376 | else | |
1377 | #endif /* THUMBEXTENSION */ | |
1378 | if ( h->root.type == bfd_link_hash_defined | |
1379 | || h->root.type == bfd_link_hash_defweak) | |
1380 | { | |
1381 | asection *sec; | |
1382 | ||
1383 | sec = h->root.u.def.section; | |
1384 | val = (h->root.u.def.value | |
1385 | + sec->output_section->vma | |
1386 | + sec->output_offset); | |
1387 | } | |
1388 | ||
1389 | else if (! info->relocateable) | |
1390 | { | |
1391 | if (! ((*info->callbacks->undefined_symbol) | |
1392 | (info, h->root.root.string, input_bfd, input_section, | |
1393 | rel->r_vaddr - input_section->vma))) | |
1394 | return false; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | if (info->base_file) | |
1399 | { | |
1400 | /* Emit a reloc if the backend thinks it needs it. */ | |
1401 | if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto)) | |
1402 | arm_emit_base_file_entry (info, output_bfd, input_section, rel->r_vaddr); | |
1403 | } | |
1404 | ||
1405 | #if 1 /* THUMBEXTENSION */ | |
1406 | if (done) | |
1407 | rstat = bfd_reloc_ok; | |
1408 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ | |
1409 | else if (! info->relocateable | |
1410 | && howto->type == ARM_THUMB23) | |
1411 | { | |
1412 | /* This is pretty much a copy of what the default | |
1413 | _bfd_final_link_relocate and _bfd_relocate_contents | |
1414 | routines do to perform a relocation, with special | |
1415 | processing for the split addressing of the Thumb BL | |
1416 | instruction. Again, it would probably be simpler adding a | |
1417 | ThumbBRANCH23 specific macro expansion into the default | |
1418 | code. */ | |
1419 | ||
1420 | bfd_vma address = rel->r_vaddr - input_section->vma; | |
1421 | ||
1422 | if (address > input_section->_raw_size) | |
1423 | rstat = bfd_reloc_outofrange; | |
1424 | else | |
1425 | { | |
1426 | bfd_vma relocation = val + addend; | |
1427 | int size = bfd_get_reloc_size (howto); | |
1428 | boolean overflow = false; | |
1429 | bfd_byte * location = contents + address; | |
1430 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1431 | bfd_vma src_mask = 0x007FFFFE; | |
1432 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; | |
1433 | bfd_signed_vma reloc_signed_min = ~reloc_signed_max; | |
1434 | bfd_vma check; | |
1435 | bfd_signed_vma signed_check; | |
1436 | bfd_vma add; | |
1437 | bfd_signed_vma signed_add; | |
1438 | ||
1439 | BFD_ASSERT (size == 4); | |
1440 | ||
1441 | /* howto->pc_relative should be TRUE for type 14 BRANCH23 */ | |
1442 | relocation -= (input_section->output_section->vma | |
1443 | + input_section->output_offset); | |
1444 | ||
1445 | /* howto->pcrel_offset should be TRUE for type 14 BRANCH23 */ | |
1446 | relocation -= address; | |
1447 | ||
1448 | /* No need to negate the relocation with BRANCH23. */ | |
1449 | /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */ | |
1450 | /* howto->rightshift == 1 */ | |
1451 | /* Drop unwanted bits from the value we are relocating to. */ | |
1452 | ||
1453 | check = relocation >> howto->rightshift; | |
1454 | ||
1455 | /* If this is a signed value, the rightshift just dropped | |
1456 | leading 1 bits (assuming twos complement). */ | |
1457 | if ((bfd_signed_vma) relocation >= 0) | |
1458 | signed_check = check; | |
1459 | else | |
1460 | signed_check = (check | |
1461 | | ((bfd_vma) - 1 | |
1462 | & ~((bfd_vma) - 1 >> howto->rightshift))); | |
1463 | ||
1464 | /* Get the value from the object file. */ | |
1465 | if (bfd_big_endian (input_bfd)) | |
1466 | { | |
1467 | add = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1); | |
1468 | } | |
1469 | else | |
1470 | { | |
1471 | add = ((((x) & 0x7ff) << 12) | (((x) & 0x07ff0000) >> 15)); | |
1472 | } | |
1473 | ||
1474 | /* Get the value from the object file with an appropriate sign. | |
1475 | The expression involving howto->src_mask isolates the upper | |
1476 | bit of src_mask. If that bit is set in the value we are | |
1477 | adding, it is negative, and we subtract out that number times | |
1478 | two. If src_mask includes the highest possible bit, then we | |
1479 | can not get the upper bit, but that does not matter since | |
1480 | signed_add needs no adjustment to become negative in that | |
1481 | case. */ | |
1482 | ||
1483 | signed_add = add; | |
1484 | ||
1485 | if ((add & (((~ src_mask) >> 1) & src_mask)) != 0) | |
1486 | signed_add -= (((~ src_mask) >> 1) & src_mask) << 1; | |
1487 | ||
1488 | /* Add the value from the object file, shifted so that it is a | |
1489 | straight number. */ | |
1490 | /* howto->bitpos == 0 */ | |
1491 | ||
1492 | signed_check += signed_add; | |
1493 | relocation += signed_add; | |
1494 | ||
1495 | BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed); | |
1496 | ||
1497 | /* Assumes two's complement. */ | |
1498 | if ( signed_check > reloc_signed_max | |
1499 | || signed_check < reloc_signed_min) | |
1500 | overflow = true; | |
1501 | ||
1502 | /* Put RELOCATION into the correct bits: */ | |
1503 | ||
1504 | if (bfd_big_endian (input_bfd)) | |
1505 | { | |
1506 | relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000)); | |
1507 | } | |
1508 | else | |
1509 | { | |
1510 | relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff)); | |
1511 | } | |
1512 | ||
1513 | /* Add RELOCATION to the correct bits of X: */ | |
1514 | x = ((x & ~howto->dst_mask) | relocation); | |
1515 | ||
1516 | /* Put the relocated value back in the object file: */ | |
1517 | bfd_put_32 (input_bfd, x, location); | |
1518 | ||
1519 | rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok; | |
1520 | } | |
1521 | } | |
1522 | else | |
1523 | #endif /* THUMBEXTENSION */ | |
1524 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1525 | contents, | |
1526 | rel->r_vaddr - input_section->vma, | |
1527 | val, addend); | |
1528 | #if 1 /* THUMBEXTENSION */ | |
1529 | /* FIXME: | |
1530 | Is this the best way to fix up thumb addresses? krk@cygnus.com | |
1531 | Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */ | |
1532 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ | |
1533 | if (! info->relocateable | |
b44267fd | 1534 | && (rel->r_type == ARM_32 || rel->r_type == ARM_RVA32)) |
252b5132 RH |
1535 | { |
1536 | /* Determine if we need to set the bottom bit of a relocated address | |
1537 | because the address is the address of a Thumb code symbol. */ | |
1538 | ||
1539 | int patchit = false; | |
1540 | ||
1541 | if (h != NULL | |
1542 | && ( h->class == C_THUMBSTATFUNC | |
1543 | || h->class == C_THUMBEXTFUNC)) | |
1544 | { | |
1545 | patchit = true; | |
1546 | } | |
1547 | else if (sym != NULL | |
1548 | && sym->n_scnum > N_UNDEF) | |
1549 | { | |
1550 | /* No hash entry - use the symbol instead. */ | |
1551 | ||
1552 | if ( sym->n_sclass == C_THUMBSTATFUNC | |
1553 | || sym->n_sclass == C_THUMBEXTFUNC) | |
1554 | patchit = true; | |
1555 | } | |
1556 | ||
1557 | if (patchit) | |
1558 | { | |
1559 | bfd_byte * location = contents + rel->r_vaddr - input_section->vma; | |
1560 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1561 | ||
1562 | bfd_put_32 (input_bfd, x | 1, location); | |
1563 | } | |
1564 | } | |
1565 | #endif /* THUMBEXTENSION */ | |
1566 | ||
1567 | switch (rstat) | |
1568 | { | |
1569 | default: | |
1570 | abort (); | |
1571 | case bfd_reloc_ok: | |
1572 | break; | |
1573 | case bfd_reloc_outofrange: | |
1574 | (*_bfd_error_handler) | |
1575 | (_("%s: bad reloc address 0x%lx in section `%s'"), | |
1576 | bfd_get_filename (input_bfd), | |
1577 | (unsigned long) rel->r_vaddr, | |
1578 | bfd_get_section_name (input_bfd, input_section)); | |
1579 | return false; | |
1580 | case bfd_reloc_overflow: | |
1581 | { | |
1582 | const char *name; | |
1583 | char buf[SYMNMLEN + 1]; | |
1584 | ||
1585 | if (symndx == -1) | |
1586 | name = "*ABS*"; | |
1587 | else if (h != NULL) | |
1588 | name = h->root.root.string; | |
1589 | else | |
1590 | { | |
1591 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); | |
1592 | if (name == NULL) | |
1593 | return false; | |
1594 | } | |
1595 | ||
1596 | if (! ((*info->callbacks->reloc_overflow) | |
1597 | (info, name, howto->name, (bfd_vma) 0, input_bfd, | |
1598 | input_section, rel->r_vaddr - input_section->vma))) | |
1599 | return false; | |
1600 | } | |
1601 | } | |
1602 | } | |
1603 | ||
1604 | return true; | |
1605 | } | |
1606 | ||
ba1b9317 CM |
1607 | #ifdef COFF_IMAGE_WITH_PE |
1608 | static | |
1609 | #endif | |
252b5132 RH |
1610 | boolean |
1611 | bfd_arm_allocate_interworking_sections (info) | |
1612 | struct bfd_link_info * info; | |
1613 | { | |
1614 | asection * s; | |
1615 | bfd_byte * foo; | |
1616 | struct coff_arm_link_hash_table * globals; | |
1617 | #if 0 | |
1618 | static char test_char = '1'; | |
1619 | #endif | |
1620 | ||
1621 | globals = coff_arm_hash_table (info); | |
1622 | ||
1623 | BFD_ASSERT (globals != NULL); | |
1624 | ||
1625 | if (globals->arm_glue_size != 0) | |
1626 | { | |
1627 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1628 | ||
1629 | s = bfd_get_section_by_name | |
1630 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
1631 | ||
1632 | BFD_ASSERT (s != NULL); | |
1633 | ||
1634 | foo = (bfd_byte *) bfd_alloc | |
1635 | (globals->bfd_of_glue_owner, globals->arm_glue_size); | |
1636 | #if 0 | |
1637 | memset (foo, test_char, globals->arm_glue_size); | |
1638 | #endif | |
1639 | ||
1640 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; | |
1641 | s->contents = foo; | |
1642 | } | |
1643 | ||
1644 | if (globals->thumb_glue_size != 0) | |
1645 | { | |
1646 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1647 | ||
1648 | s = bfd_get_section_by_name | |
1649 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1650 | ||
1651 | BFD_ASSERT (s != NULL); | |
1652 | ||
1653 | foo = (bfd_byte *) bfd_alloc | |
1654 | (globals->bfd_of_glue_owner, globals->thumb_glue_size); | |
1655 | #if 0 | |
1656 | memset (foo, test_char, globals->thumb_glue_size); | |
1657 | #endif | |
1658 | ||
1659 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; | |
1660 | s->contents = foo; | |
1661 | } | |
1662 | ||
1663 | return true; | |
1664 | } | |
1665 | ||
1666 | static void | |
1667 | record_arm_to_thumb_glue (info, h) | |
1668 | struct bfd_link_info * info; | |
1669 | struct coff_link_hash_entry * h; | |
1670 | { | |
1671 | const char * name = h->root.root.string; | |
1672 | register asection * s; | |
1673 | char * tmp_name; | |
1674 | struct coff_link_hash_entry * myh; | |
1675 | struct coff_arm_link_hash_table * globals; | |
1676 | ||
1677 | globals = coff_arm_hash_table (info); | |
1678 | ||
1679 | BFD_ASSERT (globals != NULL); | |
1680 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1681 | ||
1682 | s = bfd_get_section_by_name | |
1683 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
1684 | ||
1685 | BFD_ASSERT (s != NULL); | |
1686 | ||
1687 | tmp_name = ((char *) | |
1688 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
1689 | ||
1690 | BFD_ASSERT (tmp_name); | |
1691 | ||
1692 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
1693 | ||
1694 | myh = coff_link_hash_lookup | |
1695 | (coff_hash_table (info), tmp_name, false, false, true); | |
1696 | ||
1697 | if (myh != NULL) | |
1698 | { | |
1699 | free (tmp_name); | |
1700 | return; /* we've already seen this guy */ | |
1701 | } | |
1702 | ||
1703 | /* The only trick here is using globals->arm_glue_size as the value. Even | |
1704 | though the section isn't allocated yet, this is where we will be putting | |
1705 | it. */ | |
1706 | ||
1707 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
1708 | BSF_GLOBAL, | |
1709 | s, globals->arm_glue_size + 1, | |
1710 | NULL, true, false, | |
1711 | (struct bfd_link_hash_entry **) & myh); | |
1712 | ||
1713 | free (tmp_name); | |
1714 | ||
1715 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
1716 | ||
1717 | return; | |
1718 | } | |
1719 | ||
1720 | static void | |
1721 | record_thumb_to_arm_glue (info, h) | |
1722 | struct bfd_link_info * info; | |
1723 | struct coff_link_hash_entry * h; | |
1724 | { | |
1725 | const char * name = h->root.root.string; | |
1726 | register asection * s; | |
1727 | char * tmp_name; | |
1728 | struct coff_link_hash_entry * myh; | |
1729 | struct coff_arm_link_hash_table * globals; | |
1730 | ||
1731 | ||
1732 | globals = coff_arm_hash_table (info); | |
1733 | ||
1734 | BFD_ASSERT (globals != NULL); | |
1735 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1736 | ||
1737 | s = bfd_get_section_by_name | |
1738 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1739 | ||
1740 | BFD_ASSERT (s != NULL); | |
1741 | ||
1742 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
1743 | ||
1744 | BFD_ASSERT (tmp_name); | |
1745 | ||
1746 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
1747 | ||
1748 | myh = coff_link_hash_lookup | |
1749 | (coff_hash_table (info), tmp_name, false, false, true); | |
1750 | ||
1751 | if (myh != NULL) | |
1752 | { | |
1753 | free (tmp_name); | |
1754 | return; /* we've already seen this guy */ | |
1755 | } | |
1756 | ||
1757 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
1758 | BSF_GLOBAL, s, globals->thumb_glue_size + 1, | |
1759 | NULL, true, false, | |
1760 | (struct bfd_link_hash_entry **) & myh); | |
1761 | ||
1762 | /* If we mark it 'thumb', the disassembler will do a better job. */ | |
1763 | myh->class = C_THUMBEXTFUNC; | |
1764 | ||
1765 | free (tmp_name); | |
1766 | ||
1767 | /* Allocate another symbol to mark where we switch to arm mode. */ | |
1768 | ||
1769 | #define CHANGE_TO_ARM "__%s_change_to_arm" | |
1770 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
1771 | ||
1772 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1); | |
1773 | ||
1774 | BFD_ASSERT (tmp_name); | |
1775 | ||
1776 | sprintf (tmp_name, globals->support_old_code ? BACK_FROM_ARM : CHANGE_TO_ARM, name); | |
1777 | ||
1778 | myh = NULL; | |
1779 | ||
1780 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
1781 | BSF_LOCAL, s, globals->thumb_glue_size | |
1782 | + (globals->support_old_code ? 8 : 4), | |
1783 | NULL, true, false, | |
1784 | (struct bfd_link_hash_entry **) & myh); | |
1785 | ||
1786 | free (tmp_name); | |
1787 | ||
1788 | globals->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
1789 | ||
1790 | return; | |
1791 | } | |
1792 | ||
1793 | /* Select a BFD to be used to hold the sections used by the glue code. | |
1794 | This function is called from the linker scripts in ld/emultempl/ | |
1795 | {armcoff/pe}.em */ | |
ba1b9317 CM |
1796 | #ifdef COFF_IMAGE_WITH_PE |
1797 | static | |
1798 | #endif | |
252b5132 RH |
1799 | boolean |
1800 | bfd_arm_get_bfd_for_interworking (abfd, info) | |
1801 | bfd * abfd; | |
1802 | struct bfd_link_info * info; | |
1803 | { | |
1804 | struct coff_arm_link_hash_table * globals; | |
1805 | flagword flags; | |
1806 | asection * sec; | |
1807 | ||
1808 | /* If we are only performing a partial link do not bother | |
1809 | getting a bfd to hold the glue. */ | |
1810 | if (info->relocateable) | |
1811 | return true; | |
1812 | ||
1813 | globals = coff_arm_hash_table (info); | |
1814 | ||
1815 | BFD_ASSERT (globals != NULL); | |
1816 | ||
1817 | if (globals->bfd_of_glue_owner != NULL) | |
1818 | return true; | |
1819 | ||
1820 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
1821 | ||
1822 | if (sec == NULL) | |
1823 | { | |
1824 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
1825 | ||
1826 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
1827 | ||
1828 | if (sec == NULL | |
1829 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1830 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1831 | return false; | |
1832 | } | |
1833 | ||
1834 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1835 | ||
1836 | if (sec == NULL) | |
1837 | { | |
1838 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
1839 | ||
1840 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1841 | ||
1842 | if (sec == NULL | |
1843 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1844 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1845 | return false; | |
1846 | } | |
1847 | ||
1848 | /* Save the bfd for later use. */ | |
1849 | globals->bfd_of_glue_owner = abfd; | |
1850 | ||
1851 | return true; | |
1852 | } | |
1853 | ||
ba1b9317 CM |
1854 | #ifdef COFF_IMAGE_WITH_PE |
1855 | static | |
1856 | #endif | |
252b5132 RH |
1857 | boolean |
1858 | bfd_arm_process_before_allocation (abfd, info, support_old_code) | |
1859 | bfd * abfd; | |
1860 | struct bfd_link_info * info; | |
1861 | int support_old_code; | |
1862 | { | |
1863 | asection * sec; | |
1864 | struct coff_arm_link_hash_table * globals; | |
1865 | ||
1866 | /* If we are only performing a partial link do not bother | |
1867 | to construct any glue. */ | |
1868 | if (info->relocateable) | |
1869 | return true; | |
1870 | ||
1871 | /* Here we have a bfd that is to be included on the link. We have a hook | |
1872 | to do reloc rummaging, before section sizes are nailed down. */ | |
1873 | ||
1874 | _bfd_coff_get_external_symbols (abfd); | |
1875 | ||
1876 | globals = coff_arm_hash_table (info); | |
1877 | ||
1878 | BFD_ASSERT (globals != NULL); | |
1879 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1880 | ||
1881 | globals->support_old_code = support_old_code; | |
1882 | ||
1883 | /* Rummage around all the relocs and map the glue vectors. */ | |
1884 | sec = abfd->sections; | |
1885 | ||
1886 | if (sec == NULL) | |
1887 | return true; | |
1888 | ||
1889 | for (; sec != NULL; sec = sec->next) | |
1890 | { | |
1891 | struct internal_reloc * i; | |
1892 | struct internal_reloc * rel; | |
1893 | ||
1894 | if (sec->reloc_count == 0) | |
1895 | continue; | |
1896 | ||
1897 | /* Load the relocs. */ | |
1898 | /* FIXME: there may be a storage leak here. */ | |
1899 | ||
1900 | i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0); | |
1901 | ||
1902 | BFD_ASSERT (i != 0); | |
1903 | ||
1904 | for (rel = i; rel < i + sec->reloc_count; ++rel) | |
1905 | { | |
1906 | unsigned short r_type = rel->r_type; | |
1907 | long symndx; | |
1908 | struct coff_link_hash_entry * h; | |
1909 | ||
1910 | symndx = rel->r_symndx; | |
1911 | ||
1912 | /* If the relocation is not against a symbol it cannot concern us. */ | |
1913 | if (symndx == -1) | |
1914 | continue; | |
1915 | ||
1916 | h = obj_coff_sym_hashes (abfd)[symndx]; | |
1917 | ||
1918 | /* If the relocation is against a static symbol it must be within | |
1919 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
1920 | if (h == NULL) | |
1921 | continue; | |
1922 | ||
1923 | switch (r_type) | |
1924 | { | |
1925 | case ARM_26: | |
1926 | /* This one is a call from arm code. We need to look up | |
1927 | the target of the call. If it is a thumb target, we | |
1928 | insert glue. */ | |
1929 | ||
1930 | if (h->class == C_THUMBEXTFUNC) | |
1931 | record_arm_to_thumb_glue (info, h); | |
1932 | break; | |
1933 | ||
1934 | case ARM_THUMB23: | |
1935 | /* This one is a call from thumb code. We used to look | |
1936 | for ARM_THUMB9 and ARM_THUMB12 as well. We need to look | |
1937 | up the target of the call. If it is an arm target, we | |
1938 | insert glue. If the symbol does not exist it will be | |
1939 | given a class of C_EXT and so we will generate a stub | |
1940 | for it. This is not really a problem, since the link | |
1941 | is doomed anyway. */ | |
1942 | ||
1943 | switch (h->class) | |
1944 | { | |
1945 | case C_EXT: | |
1946 | case C_STAT: | |
1947 | case C_LABEL: | |
1948 | record_thumb_to_arm_glue (info, h); | |
1949 | break; | |
1950 | default: | |
1951 | ; | |
1952 | } | |
1953 | break; | |
1954 | ||
1955 | default: | |
1956 | break; | |
1957 | } | |
1958 | } | |
1959 | } | |
1960 | ||
1961 | return true; | |
1962 | } | |
1963 | ||
252b5132 RH |
1964 | #define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup |
1965 | #define coff_relocate_section coff_arm_relocate_section | |
1966 | #define coff_bfd_is_local_label_name coff_arm_is_local_label_name | |
1967 | #define coff_adjust_symndx coff_arm_adjust_symndx | |
1968 | #define coff_link_output_has_begun coff_arm_link_output_has_begun | |
1969 | #define coff_final_link_postscript coff_arm_final_link_postscript | |
1970 | #define coff_bfd_merge_private_bfd_data coff_arm_merge_private_bfd_data | |
1971 | #define coff_bfd_print_private_bfd_data coff_arm_print_private_bfd_data | |
1972 | #define coff_bfd_set_private_flags _bfd_coff_arm_set_private_flags | |
1973 | #define coff_bfd_copy_private_bfd_data coff_arm_copy_private_bfd_data | |
1974 | #define coff_bfd_link_hash_table_create coff_arm_link_hash_table_create | |
1975 | ||
1976 | ||
1977 | /* When doing a relocateable link, we want to convert ARM26 relocs | |
1978 | into ARM26D relocs. */ | |
1979 | ||
1980 | static boolean | |
1981 | coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp) | |
1982 | bfd *obfd; | |
1983 | struct bfd_link_info *info; | |
1984 | bfd *ibfd; | |
1985 | asection *sec; | |
1986 | struct internal_reloc *irel; | |
1987 | boolean *adjustedp; | |
1988 | { | |
1989 | if (irel->r_type == 3) | |
1990 | { | |
1991 | struct coff_link_hash_entry *h; | |
1992 | ||
1993 | h = obj_coff_sym_hashes (ibfd)[irel->r_symndx]; | |
1994 | if (h != NULL | |
1995 | && (h->root.type == bfd_link_hash_defined | |
1996 | || h->root.type == bfd_link_hash_defweak) | |
1997 | && h->root.u.def.section->output_section == sec->output_section) | |
1998 | irel->r_type = 7; | |
1999 | } | |
2000 | *adjustedp = false; | |
2001 | return true; | |
2002 | } | |
2003 | ||
2004 | /* Called when merging the private data areas of two BFDs. | |
2005 | This is important as it allows us to detect if we are | |
2006 | attempting to merge binaries compiled for different ARM | |
2007 | targets, eg different CPUs or differents APCS's. */ | |
2008 | ||
2009 | static boolean | |
2010 | coff_arm_merge_private_bfd_data (ibfd, obfd) | |
2011 | bfd * ibfd; | |
2012 | bfd * obfd; | |
2013 | { | |
2014 | BFD_ASSERT (ibfd != NULL && obfd != NULL); | |
2015 | ||
2016 | if (ibfd == obfd) | |
2017 | return true; | |
2018 | ||
2019 | /* If the two formats are different we cannot merge anything. | |
2020 | This is not an error, since it is permissable to change the | |
2021 | input and output formats. */ | |
2022 | if ( ibfd->xvec->flavour != bfd_target_coff_flavour | |
2023 | || obfd->xvec->flavour != bfd_target_coff_flavour) | |
2024 | return true; | |
2025 | ||
2026 | /* Verify that the APCS is the same for the two BFDs */ | |
2027 | if (APCS_SET (ibfd)) | |
2028 | { | |
2029 | if (APCS_SET (obfd)) | |
2030 | { | |
2031 | /* If the src and dest have different APCS flag bits set, fail. */ | |
2032 | if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd)) | |
2033 | { | |
2034 | _bfd_error_handler | |
2035 | /* xgettext: c-format */ | |
2036 | (_("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d"), | |
2037 | bfd_get_filename (ibfd), APCS_26_FLAG (ibfd) ? 26 : 32, | |
2038 | bfd_get_filename (obfd), APCS_26_FLAG (obfd) ? 26 : 32 | |
2039 | ); | |
2040 | ||
2041 | bfd_set_error (bfd_error_wrong_format); | |
2042 | return false; | |
2043 | } | |
2044 | ||
2045 | if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd)) | |
2046 | { | |
2047 | const char *msg; | |
2048 | ||
2049 | if (APCS_FLOAT_FLAG (ibfd)) | |
2050 | /* xgettext: c-format */ | |
2051 | msg = _("%s: ERROR: passes floats in float registers whereas target %s uses integer registers"); | |
2052 | else | |
2053 | /* xgettext: c-format */ | |
2054 | msg = _("%s: ERROR: passes floats in integer registers whereas target %s uses float registers"); | |
2055 | ||
2056 | _bfd_error_handler (msg, bfd_get_filename (ibfd), | |
2057 | bfd_get_filename (obfd)); | |
2058 | ||
2059 | bfd_set_error (bfd_error_wrong_format); | |
2060 | return false; | |
2061 | } | |
2062 | ||
2063 | if (PIC_FLAG (obfd) != PIC_FLAG (ibfd)) | |
2064 | { | |
2065 | const char * msg; | |
2066 | ||
2067 | if (PIC_FLAG (ibfd)) | |
2068 | /* xgettext: c-format */ | |
2069 | msg = _("%s: ERROR: compiled as position independent code, whereas target %s is absolute position"); | |
2070 | else | |
2071 | /* xgettext: c-format */ | |
2072 | msg = _("%s: ERROR: compiled as absolute position code, whereas target %s is position independent"); | |
2073 | _bfd_error_handler (msg, bfd_get_filename (ibfd), | |
2074 | bfd_get_filename (obfd)); | |
2075 | ||
2076 | bfd_set_error (bfd_error_wrong_format); | |
2077 | return false; | |
2078 | } | |
2079 | } | |
2080 | else | |
2081 | { | |
2082 | SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd)); | |
2083 | ||
2084 | /* Set up the arch and fields as well as these are probably wrong. */ | |
2085 | bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
2086 | } | |
2087 | } | |
2088 | ||
2089 | /* Check the interworking support. */ | |
2090 | if (INTERWORK_SET (ibfd)) | |
2091 | { | |
2092 | if (INTERWORK_SET (obfd)) | |
2093 | { | |
2094 | /* If the src and dest differ in their interworking issue a warning. */ | |
2095 | if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd)) | |
2096 | { | |
2097 | const char * msg; | |
2098 | ||
2099 | if (INTERWORK_FLAG (ibfd)) | |
2100 | /* xgettext: c-format */ | |
2101 | msg = _("Warning: input file %s supports interworking, whereas %s does not."); | |
2102 | else | |
2103 | /* xgettext: c-format */ | |
2104 | msg = _("Warning: input file %s does not support interworking, whereas %s does."); | |
2105 | ||
2106 | _bfd_error_handler (msg, bfd_get_filename (ibfd), | |
2107 | bfd_get_filename (obfd)); | |
2108 | } | |
2109 | } | |
2110 | else | |
2111 | { | |
2112 | SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd)); | |
2113 | } | |
2114 | } | |
2115 | ||
2116 | return true; | |
2117 | } | |
2118 | ||
2119 | ||
2120 | /* Display the flags field. */ | |
2121 | ||
2122 | static boolean | |
2123 | coff_arm_print_private_bfd_data (abfd, ptr) | |
2124 | bfd * abfd; | |
2125 | PTR ptr; | |
2126 | { | |
2127 | FILE * file = (FILE *) ptr; | |
2128 | ||
2129 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
2130 | ||
2131 | /* xgettext:c-format */ | |
2132 | fprintf (file, _("private flags = %x:"), coff_data (abfd)->flags); | |
2133 | ||
2134 | if (APCS_SET (abfd)) | |
2135 | { | |
2136 | /* xgettext: APCS is ARM Prodecure Call Standard, it should not be translated. */ | |
2137 | fprintf (file, " [APCS-%d]", APCS_26_FLAG (abfd) ? 26 : 32); | |
2138 | ||
2139 | if (APCS_FLOAT_FLAG (abfd)) | |
2140 | fprintf (file, _(" [floats passed in float registers]")); | |
2141 | else | |
2142 | fprintf (file, _(" [floats passed in integer registers]")); | |
2143 | ||
2144 | if (PIC_FLAG (abfd)) | |
2145 | fprintf (file, _(" [position independent]")); | |
2146 | else | |
2147 | fprintf (file, _(" [absolute position]")); | |
2148 | } | |
2149 | ||
2150 | if (! INTERWORK_SET (abfd)) | |
2151 | fprintf (file, _(" [interworking flag not initialised]")); | |
2152 | else if (INTERWORK_FLAG (abfd)) | |
2153 | fprintf (file, _(" [interworking supported]")); | |
2154 | else | |
2155 | fprintf (file, _(" [interworking not supported]")); | |
2156 | ||
2157 | fputc ('\n', file); | |
2158 | ||
2159 | return true; | |
2160 | } | |
2161 | ||
2162 | ||
2163 | /* Copies the given flags into the coff_tdata.flags field. | |
2164 | Typically these flags come from the f_flags[] field of | |
2165 | the COFF filehdr structure, which contains important, | |
2166 | target specific information. | |
2167 | Note: Although this function is static, it is explicitly | |
2168 | called from both coffcode.h and peicode.h. */ | |
2169 | ||
2170 | static boolean | |
2171 | _bfd_coff_arm_set_private_flags (abfd, flags) | |
2172 | bfd * abfd; | |
2173 | flagword flags; | |
2174 | { | |
2175 | flagword flag; | |
2176 | ||
2177 | BFD_ASSERT (abfd != NULL); | |
2178 | ||
2179 | flag = (flags & F_APCS26) ? F_APCS_26 : 0; | |
2180 | ||
2181 | /* Make sure that the APCS field has not been initialised to the opposite | |
2182 | value. */ | |
2183 | if (APCS_SET (abfd) | |
2184 | && ( (APCS_26_FLAG (abfd) != flag) | |
2185 | || (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT)) | |
948221a8 | 2186 | || (PIC_FLAG (abfd) != (flags & F_PIC)) |
252b5132 RH |
2187 | )) |
2188 | return false; | |
2189 | ||
2190 | flag |= (flags & (F_APCS_FLOAT | F_PIC)); | |
2191 | ||
2192 | SET_APCS_FLAGS (abfd, flag); | |
2193 | ||
2194 | flag = (flags & F_INTERWORK); | |
2195 | ||
2196 | /* If the BFD has already had its interworking flag set, but it | |
2197 | is different from the value that we have been asked to set, | |
2198 | then assume that that merged code will not support interworking | |
2199 | and set the flag accordingly. */ | |
2200 | if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag)) | |
2201 | { | |
2202 | if (flag) | |
2203 | /* xgettext: c-format */ | |
2204 | _bfd_error_handler (_("Warning: Not setting interworking flag of %s, since it has already been specified as non-interworking"), | |
2205 | bfd_get_filename (abfd)); | |
2206 | else | |
2207 | /* xgettext: c-format */ | |
2208 | _bfd_error_handler (_("Warning: Clearing the interworking flag of %s due to outside request"), | |
2209 | bfd_get_filename (abfd)); | |
2210 | flag = 0; | |
2211 | } | |
2212 | ||
2213 | SET_INTERWORK_FLAG (abfd, flag); | |
2214 | ||
2215 | return true; | |
2216 | } | |
2217 | ||
2218 | ||
2219 | /* Copy the important parts of the target specific data | |
2220 | from one instance of a BFD to another. */ | |
2221 | ||
2222 | static boolean | |
2223 | coff_arm_copy_private_bfd_data (src, dest) | |
2224 | bfd * src; | |
2225 | bfd * dest; | |
2226 | { | |
2227 | BFD_ASSERT (src != NULL && dest != NULL); | |
2228 | ||
2229 | if (src == dest) | |
2230 | return true; | |
2231 | ||
2232 | /* If the destination is not in the same format as the source, do not do | |
2233 | the copy. */ | |
2234 | if (src->xvec != dest->xvec) | |
2235 | return true; | |
2236 | ||
2237 | /* copy the flags field */ | |
2238 | if (APCS_SET (src)) | |
2239 | { | |
2240 | if (APCS_SET (dest)) | |
2241 | { | |
2242 | /* If the src and dest have different APCS flag bits set, fail. */ | |
2243 | if (APCS_26_FLAG (dest) != APCS_26_FLAG (src)) | |
2244 | return false; | |
2245 | ||
2246 | if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src)) | |
2247 | return false; | |
2248 | ||
2249 | if (PIC_FLAG (dest) != PIC_FLAG (src)) | |
2250 | return false; | |
2251 | } | |
2252 | else | |
2253 | SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src) | |
2254 | | PIC_FLAG (src)); | |
2255 | } | |
2256 | ||
2257 | if (INTERWORK_SET (src)) | |
2258 | { | |
2259 | if (INTERWORK_SET (dest)) | |
2260 | { | |
2261 | /* If the src and dest have different interworking flags then turn | |
2262 | off the interworking bit. */ | |
2263 | if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src)) | |
2264 | { | |
2265 | if (INTERWORK_FLAG (dest)) | |
2266 | { | |
2267 | /* xgettext:c-format */ | |
2268 | _bfd_error_handler (("Warning: Clearing the interworking bit of %s, because the non-interworking code in %s has been copied into it"), | |
2269 | bfd_get_filename (dest), | |
2270 | bfd_get_filename (src)); | |
2271 | } | |
2272 | ||
2273 | SET_INTERWORK_FLAG (dest, 0); | |
2274 | } | |
2275 | } | |
2276 | else | |
2277 | { | |
2278 | SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src)); | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | return true; | |
2283 | } | |
2284 | ||
2285 | /* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX | |
2286 | *must* match the definitions in gcc/config/arm/coff.h and semi.h */ | |
2287 | #define LOCAL_LABEL_PREFIX "." | |
2288 | #ifndef USER_LABEL_PREFIX | |
2289 | #define USER_LABEL_PREFIX "_" | |
2290 | #endif | |
2291 | ||
2292 | static boolean | |
2293 | coff_arm_is_local_label_name (abfd, name) | |
2294 | bfd * abfd; | |
2295 | const char * name; | |
2296 | { | |
2297 | #ifdef LOCAL_LABEL_PREFIX | |
2298 | /* If there is a prefix for local labels then look for this. | |
2299 | If the prefix exists, but it is empty, then ignore the test. */ | |
2300 | ||
2301 | if (LOCAL_LABEL_PREFIX[0] != 0) | |
2302 | { | |
2303 | if (strncmp (name, LOCAL_LABEL_PREFIX, strlen (LOCAL_LABEL_PREFIX)) == 0) | |
2304 | return true; | |
2305 | } | |
2306 | #endif | |
2307 | #ifdef USER_LABEL_PREFIX | |
2308 | if (USER_LABEL_PREFIX[0] != 0) | |
2309 | { | |
2310 | if (strncmp (name, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)) == 0) | |
2311 | return false; | |
2312 | } | |
2313 | #endif | |
2314 | ||
2315 | /* devo/gcc/config/dbxcoff.h defines ASM_OUTPUT_SOURCE_LINE to generate | |
2316 | local line numbers as .LM<number>, so treat these as local. */ | |
2317 | ||
2318 | switch (name[0]) | |
2319 | { | |
2320 | case 'L': return true; | |
2321 | case '.': return (name[1] == 'L' && name[2] == 'M') ? true : false; | |
2322 | default: return false; /* Cannot make our minds up - default to | |
2323 | false so that it will not be stripped | |
2324 | by accident. */ | |
2325 | } | |
2326 | } | |
2327 | ||
2328 | /* This piece of machinery exists only to guarantee that the bfd that holds | |
2329 | the glue section is written last. | |
2330 | ||
2331 | This does depend on bfd_make_section attaching a new section to the | |
2332 | end of the section list for the bfd. | |
2333 | ||
2334 | krk@cygnus.com */ | |
2335 | ||
2336 | static boolean | |
2337 | coff_arm_link_output_has_begun (sub, info) | |
2338 | bfd * sub; | |
2339 | struct coff_final_link_info * info; | |
2340 | { | |
2341 | return (sub->output_has_begun | |
2342 | || sub == coff_arm_hash_table (info->info)->bfd_of_glue_owner); | |
2343 | } | |
2344 | ||
2345 | static boolean | |
2346 | coff_arm_final_link_postscript (abfd, pfinfo) | |
2347 | bfd * abfd; | |
2348 | struct coff_final_link_info * pfinfo; | |
2349 | { | |
2350 | struct coff_arm_link_hash_table * globals; | |
2351 | ||
2352 | globals = coff_arm_hash_table (pfinfo->info); | |
2353 | ||
2354 | BFD_ASSERT (globals != NULL); | |
2355 | ||
2356 | if (globals->bfd_of_glue_owner != NULL) | |
2357 | { | |
2358 | if (! _bfd_coff_link_input_bfd (pfinfo, globals->bfd_of_glue_owner)) | |
2359 | return false; | |
2360 | ||
2361 | globals->bfd_of_glue_owner->output_has_begun = true; | |
2362 | } | |
2363 | ||
2364 | return true; | |
2365 | } | |
2366 | ||
2367 | #if 0 | |
2368 | #define coff_SWAP_sym_in arm_bfd_coff_swap_sym_in | |
2369 | ||
2370 | static void coff_swap_sym_in PARAMS ((bfd *, PTR, PTR)); | |
2371 | ||
2372 | /* Sepcial version of symbol swapper, used to grab a bfd | |
2373 | onto which the glue sections can be attached. */ | |
2374 | static void | |
2375 | arm_bfd_coff_swap_sym_in (abfd, ext1, in1) | |
2376 | bfd * abfd; | |
2377 | PTR ext1; | |
2378 | PTR in1; | |
2379 | { | |
2380 | flagword flags; | |
2381 | register asection * s; | |
2382 | ||
2383 | /* Do the normal swap in. */ | |
2384 | coff_swap_sym_in (abfd, ext1, in1); | |
2385 | ||
2386 | if (bfd_of_glue_owner != NULL) /* we already have a toc, so go home */ | |
2387 | return; | |
2388 | ||
2389 | /* Save the bfd for later allocation. */ | |
2390 | bfd_of_glue_owner = abfd; | |
2391 | ||
2392 | s = bfd_get_section_by_name (bfd_of_glue_owner , | |
2393 | ARM2THUMB_GLUE_SECTION_NAME); | |
2394 | ||
2395 | if (s == NULL) | |
2396 | { | |
2397 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ; | |
2398 | ||
2399 | s = bfd_make_section (bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
2400 | ||
2401 | if (s == NULL | |
2402 | || !bfd_set_section_flags (bfd_of_glue_owner, s, flags) | |
2403 | || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2)) | |
2404 | { | |
2405 | /* FIXME: set appropriate bfd error */ | |
2406 | abort(); | |
2407 | } | |
2408 | } | |
2409 | ||
2410 | s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
2411 | ||
2412 | if (s == NULL) | |
2413 | { | |
2414 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ; | |
2415 | ||
2416 | s = bfd_make_section (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
2417 | ||
2418 | if (s == NULL | |
2419 | || !bfd_set_section_flags (bfd_of_glue_owner, s, flags) | |
2420 | || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2)) | |
2421 | { | |
2422 | /* FIXME: set appropriate bfd error krk@cygnus.com */ | |
2423 | abort(); | |
2424 | } | |
2425 | } | |
2426 | ||
2427 | return; | |
2428 | } | |
2429 | #endif | |
2430 | ||
2431 | #include "coffcode.h" | |
2432 | ||
2433 | const bfd_target | |
2434 | #ifdef TARGET_LITTLE_SYM | |
2435 | TARGET_LITTLE_SYM = | |
2436 | #else | |
2437 | armcoff_little_vec = | |
2438 | #endif | |
2439 | { | |
2440 | #ifdef TARGET_LITTLE_NAME | |
2441 | TARGET_LITTLE_NAME, | |
2442 | #else | |
2443 | "coff-arm-little", | |
2444 | #endif | |
2445 | bfd_target_coff_flavour, | |
2446 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
2447 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
2448 | ||
2449 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2450 | HAS_LINENO | HAS_DEBUG | | |
2451 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
2452 | ||
2453 | #ifndef COFF_WITH_PE | |
2454 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
2455 | #else | |
2456 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
2457 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), | |
2458 | #endif | |
2459 | ||
2460 | #ifdef TARGET_UNDERSCORE | |
2461 | TARGET_UNDERSCORE, /* leading underscore */ | |
2462 | #else | |
2463 | 0, /* leading underscore */ | |
2464 | #endif | |
2465 | '/', /* ar_pad_char */ | |
2466 | 15, /* ar_max_namelen */ | |
2467 | ||
2468 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2469 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2470 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
2471 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2472 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2473 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
2474 | ||
2475 | /* Note that we allow an object file to be treated as a core file as well. */ | |
2476 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
2477 | bfd_generic_archive_p, coff_object_p}, | |
2478 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
2479 | bfd_false}, | |
2480 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
2481 | _bfd_write_archive_contents, bfd_false}, | |
2482 | ||
2483 | BFD_JUMP_TABLE_GENERIC (coff), | |
2484 | BFD_JUMP_TABLE_COPY (coff), | |
2485 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2486 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
2487 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
2488 | BFD_JUMP_TABLE_RELOCS (coff), | |
2489 | BFD_JUMP_TABLE_WRITE (coff), | |
2490 | BFD_JUMP_TABLE_LINK (coff), | |
2491 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2492 | ||
2493 | (PTR) & bfd_coff_std_swap_table, | |
2494 | }; | |
2495 | ||
2496 | const bfd_target | |
2497 | #ifdef TARGET_BIG_SYM | |
2498 | TARGET_BIG_SYM = | |
2499 | #else | |
2500 | armcoff_big_vec = | |
2501 | #endif | |
2502 | { | |
2503 | #ifdef TARGET_BIG_NAME | |
2504 | TARGET_BIG_NAME, | |
2505 | #else | |
2506 | "coff-arm-big", | |
2507 | #endif | |
2508 | bfd_target_coff_flavour, | |
2509 | BFD_ENDIAN_BIG, /* data byte order is big */ | |
2510 | BFD_ENDIAN_BIG, /* header byte order is big */ | |
2511 | ||
2512 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2513 | HAS_LINENO | HAS_DEBUG | | |
2514 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
2515 | ||
2516 | #ifndef COFF_WITH_PE | |
2517 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
2518 | #else | |
2519 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
2520 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), | |
2521 | #endif | |
2522 | ||
2523 | #ifdef TARGET_UNDERSCORE | |
2524 | TARGET_UNDERSCORE, /* leading underscore */ | |
2525 | #else | |
2526 | 0, /* leading underscore */ | |
2527 | #endif | |
2528 | '/', /* ar_pad_char */ | |
2529 | 15, /* ar_max_namelen */ | |
2530 | ||
2531 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
2532 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
2533 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
2534 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
2535 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
2536 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
2537 | ||
2538 | /* Note that we allow an object file to be treated as a core file as well. */ | |
2539 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
2540 | bfd_generic_archive_p, coff_object_p}, | |
2541 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
2542 | bfd_false}, | |
2543 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
2544 | _bfd_write_archive_contents, bfd_false}, | |
2545 | ||
2546 | BFD_JUMP_TABLE_GENERIC (coff), | |
2547 | BFD_JUMP_TABLE_COPY (coff), | |
2548 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2549 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
2550 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
2551 | BFD_JUMP_TABLE_RELOCS (coff), | |
2552 | BFD_JUMP_TABLE_WRITE (coff), | |
2553 | BFD_JUMP_TABLE_LINK (coff), | |
2554 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2555 | ||
2556 | (PTR) & bfd_coff_std_swap_table, | |
2557 | }; |