Commit | Line | Data |
---|---|---|
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)) | |
af74ae99 NC |
50 | |
51 | #ifndef NUM_ELEM | |
52 | #define NUM_ELEM(a) ((sizeof (a)) / sizeof ((a)[0])) | |
53 | #endif | |
252b5132 RH |
54 | |
55 | typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype; | |
56 | /* some typedefs for holding instructions */ | |
57 | typedef unsigned long int insn32; | |
58 | typedef unsigned short int insn16; | |
59 | ||
60 | ||
61 | /* Forward declarations for stupid compilers. */ | |
62 | static boolean coff_arm_relocate_section | |
63 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
64 | struct internal_reloc *, struct internal_syment *, asection **)); | |
65 | static bfd_reloc_status_type aoutarm_fix_pcrel_26_done | |
66 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
67 | static bfd_reloc_status_type aoutarm_fix_pcrel_26 | |
68 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
69 | static bfd_reloc_status_type coff_thumb_pcrel_23 | |
70 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
71 | static bfd_reloc_status_type coff_thumb_pcrel_12 | |
72 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
73 | static bfd_reloc_status_type coff_thumb_pcrel_9 | |
74 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
75 | static bfd_reloc_status_type coff_arm_reloc | |
76 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
77 | static boolean coff_arm_adjust_symndx | |
78 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, | |
79 | asection *, struct internal_reloc *, boolean *)); | |
80 | static reloc_howto_type * coff_arm_rtype_to_howto | |
81 | PARAMS ((bfd *, asection *, struct internal_reloc *, | |
82 | struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *)); | |
83 | static bfd_reloc_status_type coff_thumb_pcrel_common | |
84 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **, | |
85 | thumb_pcrel_branchtype)); | |
86 | static CONST struct reloc_howto_struct * coff_arm_reloc_type_lookup | |
87 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
88 | static struct bfd_link_hash_table * coff_arm_link_hash_table_create | |
89 | PARAMS ((bfd *)); | |
90 | static insn32 insert_thumb_branch | |
91 | PARAMS ((insn32, int)); | |
92 | static struct coff_link_hash_entry * find_thumb_glue | |
93 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
94 | static struct coff_link_hash_entry * find_arm_glue | |
95 | PARAMS ((struct bfd_link_info *, CONST char *, bfd *)); | |
e049a0de | 96 | #ifndef COFF_IMAGE_WITH_PE |
252b5132 RH |
97 | static void record_arm_to_thumb_glue |
98 | PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *)); | |
99 | static void record_thumb_to_arm_glue | |
100 | PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *)); | |
e049a0de | 101 | #endif |
252b5132 RH |
102 | static boolean coff_arm_merge_private_bfd_data |
103 | PARAMS ((bfd *, bfd *)); | |
104 | static boolean coff_arm_print_private_bfd_data | |
105 | PARAMS ((bfd *, PTR)); | |
106 | static boolean _bfd_coff_arm_set_private_flags | |
107 | PARAMS ((bfd *, flagword)); | |
108 | static boolean coff_arm_copy_private_bfd_data | |
109 | PARAMS ((bfd *, bfd *)); | |
110 | static boolean coff_arm_is_local_label_name | |
111 | PARAMS ((bfd *, const char *)); | |
112 | static boolean coff_arm_link_output_has_begun | |
113 | PARAMS ((bfd *, struct coff_final_link_info *)); | |
114 | static boolean coff_arm_final_link_postscript | |
115 | PARAMS ((bfd *, struct coff_final_link_info *)); | |
116 | ||
117 | /* The linker script knows the section names for placement. | |
118 | The entry_names are used to do simple name mangling on the stubs. | |
119 | Given a function name, and its type, the stub can be found. The | |
120 | name can be changed. The only requirement is the %s be present. | |
121 | */ | |
122 | ||
123 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" | |
124 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
125 | ||
126 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
127 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
128 | ||
129 | /* Used by the assembler. */ | |
130 | static bfd_reloc_status_type | |
131 | coff_arm_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
132 | error_message) | |
133 | bfd *abfd; | |
134 | arelent *reloc_entry; | |
5f771d47 | 135 | asymbol *symbol ATTRIBUTE_UNUSED; |
252b5132 | 136 | PTR data; |
5f771d47 | 137 | asection *input_section ATTRIBUTE_UNUSED; |
252b5132 | 138 | bfd *output_bfd; |
5f771d47 | 139 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
140 | { |
141 | symvalue diff; | |
142 | if (output_bfd == (bfd *) NULL) | |
143 | return bfd_reloc_continue; | |
144 | ||
145 | diff = reloc_entry->addend; | |
146 | ||
147 | #define DOIT(x) \ | |
148 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) | |
149 | ||
150 | if (diff != 0) | |
151 | { | |
152 | reloc_howto_type *howto = reloc_entry->howto; | |
153 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
154 | ||
155 | switch (howto->size) | |
156 | { | |
157 | case 0: | |
158 | { | |
159 | char x = bfd_get_8 (abfd, addr); | |
160 | DOIT (x); | |
161 | bfd_put_8 (abfd, x, addr); | |
162 | } | |
163 | break; | |
164 | ||
165 | case 1: | |
166 | { | |
167 | short x = bfd_get_16 (abfd, addr); | |
168 | DOIT (x); | |
169 | bfd_put_16 (abfd, x, addr); | |
170 | } | |
171 | break; | |
172 | ||
173 | case 2: | |
174 | { | |
175 | long x = bfd_get_32 (abfd, addr); | |
176 | DOIT (x); | |
177 | bfd_put_32 (abfd, x, addr); | |
178 | } | |
179 | break; | |
180 | ||
181 | default: | |
182 | abort (); | |
183 | } | |
184 | } | |
185 | ||
186 | /* Now let bfd_perform_relocation finish everything up. */ | |
187 | return bfd_reloc_continue; | |
188 | } | |
189 | ||
190 | /* If USER_LABEL_PREFIX is defined as "_" (see coff_arm_is_local_label_name() | |
191 | in this file), then TARGET_UNDERSCORE should be defined, otherwise it | |
192 | should not. */ | |
193 | #ifndef TARGET_UNDERSCORE | |
194 | #define TARGET_UNDERSCORE '_' | |
195 | #endif | |
196 | ||
197 | #ifndef PCRELOFFSET | |
198 | #define PCRELOFFSET true | |
199 | #endif | |
200 | ||
201 | /* These most certainly belong somewhere else. Just had to get rid of | |
202 | the manifest constants in the code. */ | |
203 | ||
204 | #define ARM_8 0 | |
205 | #define ARM_16 1 | |
206 | #define ARM_32 2 | |
207 | #define ARM_26 3 | |
208 | #define ARM_DISP8 4 | |
209 | #define ARM_DISP16 5 | |
210 | #define ARM_DISP32 6 | |
211 | #define ARM_26D 7 | |
212 | /* 8 is unused */ | |
213 | #define ARM_NEG16 9 | |
214 | #define ARM_NEG32 10 | |
215 | #define ARM_RVA32 11 | |
216 | #define ARM_THUMB9 12 | |
217 | #define ARM_THUMB12 13 | |
218 | #define ARM_THUMB23 14 | |
219 | ||
220 | static reloc_howto_type aoutarm_std_reloc_howto[] = | |
221 | { | |
222 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
223 | HOWTO(ARM_8, /* type */ | |
224 | 0, /* rightshift */ | |
225 | 0, /* size */ | |
226 | 8, /* bitsize */ | |
227 | false, /* pc_relative */ | |
228 | 0, /* bitpos */ | |
229 | complain_overflow_bitfield, /* complain_on_overflow */ | |
230 | coff_arm_reloc, /* special_function */ | |
231 | "ARM_8", /* name */ | |
232 | true, /* partial_inplace */ | |
233 | 0x000000ff, /* src_mask */ | |
234 | 0x000000ff, /* dst_mask */ | |
235 | PCRELOFFSET /* pcrel_offset */), | |
236 | HOWTO(ARM_16, | |
237 | 0, | |
238 | 1, | |
239 | 16, | |
240 | false, | |
241 | 0, | |
242 | complain_overflow_bitfield, | |
243 | coff_arm_reloc, | |
244 | "ARM_16", | |
245 | true, | |
246 | 0x0000ffff, | |
247 | 0x0000ffff, | |
248 | PCRELOFFSET), | |
249 | HOWTO(ARM_32, | |
250 | 0, | |
251 | 2, | |
252 | 32, | |
253 | false, | |
254 | 0, | |
255 | complain_overflow_bitfield, | |
256 | coff_arm_reloc, | |
257 | "ARM_32", | |
258 | true, | |
259 | 0xffffffff, | |
260 | 0xffffffff, | |
261 | PCRELOFFSET), | |
262 | HOWTO(ARM_26, | |
263 | 2, | |
264 | 2, | |
265 | 24, | |
266 | true, | |
267 | 0, | |
268 | complain_overflow_signed, | |
269 | aoutarm_fix_pcrel_26 , | |
270 | "ARM_26", | |
271 | false, | |
272 | 0x00ffffff, | |
273 | 0x00ffffff, | |
274 | PCRELOFFSET), | |
275 | HOWTO(ARM_DISP8, | |
276 | 0, | |
277 | 0, | |
278 | 8, | |
279 | true, | |
280 | 0, | |
281 | complain_overflow_signed, | |
282 | coff_arm_reloc, | |
283 | "ARM_DISP8", | |
284 | true, | |
285 | 0x000000ff, | |
286 | 0x000000ff, | |
287 | true), | |
288 | HOWTO( ARM_DISP16, | |
289 | 0, | |
290 | 1, | |
291 | 16, | |
292 | true, | |
293 | 0, | |
294 | complain_overflow_signed, | |
295 | coff_arm_reloc, | |
296 | "ARM_DISP16", | |
297 | true, | |
298 | 0x0000ffff, | |
299 | 0x0000ffff, | |
300 | true), | |
301 | HOWTO( ARM_DISP32, | |
302 | 0, | |
303 | 2, | |
304 | 32, | |
305 | true, | |
306 | 0, | |
307 | complain_overflow_signed, | |
308 | coff_arm_reloc, | |
309 | "ARM_DISP32", | |
310 | true, | |
311 | 0xffffffff, | |
312 | 0xffffffff, | |
313 | true), | |
314 | HOWTO( ARM_26D, | |
315 | 2, | |
316 | 2, | |
317 | 24, | |
318 | false, | |
319 | 0, | |
320 | complain_overflow_dont, | |
321 | aoutarm_fix_pcrel_26_done, | |
322 | "ARM_26D", | |
323 | true, | |
324 | 0x00ffffff, | |
325 | 0x0, | |
326 | false), | |
327 | /* 8 is unused */ | |
5f771d47 | 328 | EMPTY_HOWTO (-1), |
252b5132 RH |
329 | HOWTO( ARM_NEG16, |
330 | 0, | |
331 | -1, | |
332 | 16, | |
333 | false, | |
334 | 0, | |
335 | complain_overflow_bitfield, | |
336 | coff_arm_reloc, | |
337 | "ARM_NEG16", | |
338 | true, | |
339 | 0x0000ffff, | |
340 | 0x0000ffff, | |
341 | false), | |
342 | HOWTO( ARM_NEG32, | |
343 | 0, | |
344 | -2, | |
345 | 32, | |
346 | false, | |
347 | 0, | |
348 | complain_overflow_bitfield, | |
349 | coff_arm_reloc, | |
350 | "ARM_NEG32", | |
351 | true, | |
352 | 0xffffffff, | |
353 | 0xffffffff, | |
354 | false), | |
355 | HOWTO( ARM_RVA32, | |
356 | 0, | |
357 | 2, | |
358 | 32, | |
359 | false, | |
360 | 0, | |
361 | complain_overflow_bitfield, | |
362 | coff_arm_reloc, | |
363 | "ARM_RVA32", | |
364 | true, | |
365 | 0xffffffff, | |
366 | 0xffffffff, | |
367 | PCRELOFFSET), | |
368 | HOWTO( ARM_THUMB9, | |
369 | 1, | |
370 | 1, | |
371 | 8, | |
372 | true, | |
373 | 0, | |
374 | complain_overflow_signed, | |
375 | coff_thumb_pcrel_9 , | |
376 | "ARM_THUMB9", | |
377 | false, | |
378 | 0x000000ff, | |
379 | 0x000000ff, | |
380 | PCRELOFFSET), | |
381 | HOWTO( ARM_THUMB12, | |
382 | 1, | |
383 | 1, | |
384 | 11, | |
385 | true, | |
386 | 0, | |
387 | complain_overflow_signed, | |
388 | coff_thumb_pcrel_12 , | |
389 | "ARM_THUMB12", | |
390 | false, | |
391 | 0x000007ff, | |
392 | 0x000007ff, | |
393 | PCRELOFFSET), | |
394 | HOWTO( ARM_THUMB23, | |
395 | 1, | |
396 | 2, | |
397 | 22, | |
398 | true, | |
399 | 0, | |
400 | complain_overflow_signed, | |
401 | coff_thumb_pcrel_23 , | |
402 | "ARM_THUMB23", | |
403 | false, | |
404 | 0x07ff07ff, | |
405 | 0x07ff07ff, | |
406 | PCRELOFFSET), | |
407 | }; | |
408 | ||
af74ae99 NC |
409 | #define NUM_RELOCS NUM_ELEM (aoutarm_std_reloc_howto) |
410 | ||
252b5132 RH |
411 | #ifdef COFF_WITH_PE |
412 | /* Return true if this relocation should | |
413 | appear in the output .reloc section. */ | |
414 | ||
415 | static boolean | |
416 | in_reloc_p (abfd, howto) | |
5f771d47 | 417 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
418 | reloc_howto_type * howto; |
419 | { | |
420 | return !howto->pc_relative && howto->type != ARM_RVA32; | |
421 | } | |
422 | #endif | |
423 | ||
af74ae99 NC |
424 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
425 | (cache_ptr)->howto = \ | |
426 | (dst)->r_type < NUM_RELOCS \ | |
427 | ? aoutarm_std_reloc_howto + (dst)->r_type \ | |
428 | : NULL | |
252b5132 RH |
429 | |
430 | #define coff_rtype_to_howto coff_arm_rtype_to_howto | |
431 | ||
432 | static reloc_howto_type * | |
433 | coff_arm_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
5f771d47 | 434 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
435 | asection *sec; |
436 | struct internal_reloc *rel; | |
5f771d47 ILT |
437 | struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; |
438 | struct internal_syment *sym ATTRIBUTE_UNUSED; | |
252b5132 RH |
439 | bfd_vma *addendp; |
440 | { | |
af74ae99 | 441 | reloc_howto_type * howto; |
252b5132 | 442 | |
af74ae99 NC |
443 | if (rel->r_type >= NUM_RELOCS) |
444 | return NULL; | |
445 | ||
252b5132 RH |
446 | howto = aoutarm_std_reloc_howto + rel->r_type; |
447 | ||
448 | if (rel->r_type == ARM_RVA32) | |
af74ae99 | 449 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; |
252b5132 RH |
450 | |
451 | return howto; | |
252b5132 RH |
452 | } |
453 | /* Used by the assembler. */ | |
454 | ||
455 | static bfd_reloc_status_type | |
456 | aoutarm_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section, | |
457 | output_bfd, error_message) | |
5f771d47 ILT |
458 | bfd *abfd ATTRIBUTE_UNUSED; |
459 | arelent *reloc_entry ATTRIBUTE_UNUSED; | |
460 | asymbol *symbol ATTRIBUTE_UNUSED; | |
461 | PTR data ATTRIBUTE_UNUSED; | |
462 | asection *input_section ATTRIBUTE_UNUSED; | |
463 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
464 | char **error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
465 | { |
466 | /* This is dead simple at present. */ | |
467 | return bfd_reloc_ok; | |
468 | } | |
469 | ||
470 | /* Used by the assembler. */ | |
471 | ||
472 | static bfd_reloc_status_type | |
473 | aoutarm_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section, | |
474 | output_bfd, error_message) | |
475 | bfd *abfd; | |
476 | arelent *reloc_entry; | |
477 | asymbol *symbol; | |
478 | PTR data; | |
479 | asection *input_section; | |
480 | bfd *output_bfd; | |
5f771d47 | 481 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
482 | { |
483 | bfd_vma relocation; | |
484 | bfd_size_type addr = reloc_entry->address; | |
485 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
486 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
487 | ||
488 | /* If this is an undefined symbol, return error */ | |
489 | if (symbol->section == &bfd_und_section | |
490 | && (symbol->flags & BSF_WEAK) == 0) | |
491 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
492 | ||
493 | /* If the sections are different, and we are doing a partial relocation, | |
494 | just ignore it for now. */ | |
495 | if (symbol->section->name != input_section->name | |
496 | && output_bfd != (bfd *)NULL) | |
497 | return bfd_reloc_continue; | |
498 | ||
499 | relocation = (target & 0x00ffffff) << 2; | |
500 | relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */ | |
501 | relocation += symbol->value; | |
502 | relocation += symbol->section->output_section->vma; | |
503 | relocation += symbol->section->output_offset; | |
504 | relocation += reloc_entry->addend; | |
505 | relocation -= input_section->output_section->vma; | |
506 | relocation -= input_section->output_offset; | |
507 | relocation -= addr; | |
508 | ||
509 | if (relocation & 3) | |
510 | return bfd_reloc_overflow; | |
511 | ||
512 | /* Check for overflow */ | |
513 | if (relocation & 0x02000000) | |
514 | { | |
515 | if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff) | |
516 | flag = bfd_reloc_overflow; | |
517 | } | |
518 | else if (relocation & ~0x03ffffff) | |
519 | flag = bfd_reloc_overflow; | |
520 | ||
521 | target &= ~0x00ffffff; | |
522 | target |= (relocation >> 2) & 0x00ffffff; | |
523 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); | |
524 | ||
525 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
526 | Strictly this is only necessary if we are doing a partial relocation. */ | |
527 | reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D]; | |
528 | ||
529 | return flag; | |
530 | } | |
531 | ||
532 | static bfd_reloc_status_type | |
533 | coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, input_section, | |
534 | output_bfd, error_message, btype) | |
535 | bfd *abfd; | |
536 | arelent *reloc_entry; | |
537 | asymbol *symbol; | |
538 | PTR data; | |
539 | asection *input_section; | |
540 | bfd *output_bfd; | |
5f771d47 | 541 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
542 | thumb_pcrel_branchtype btype; |
543 | { | |
544 | bfd_vma relocation = 0; | |
545 | bfd_size_type addr = reloc_entry->address; | |
546 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
547 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
548 | bfd_vma dstmsk; | |
549 | bfd_vma offmsk; | |
550 | bfd_vma signbit; | |
551 | ||
552 | /* NOTE: This routine is currently used by GAS, but not by the link | |
553 | phase. */ | |
554 | ||
555 | switch (btype) | |
556 | { | |
557 | case b9: | |
558 | dstmsk = 0x000000ff; | |
559 | offmsk = 0x000001fe; | |
560 | signbit = 0x00000100; | |
561 | break; | |
562 | ||
563 | case b12: | |
564 | dstmsk = 0x000007ff; | |
565 | offmsk = 0x00000ffe; | |
566 | signbit = 0x00000800; | |
567 | break; | |
568 | ||
569 | case b23: | |
570 | dstmsk = 0x07ff07ff; | |
571 | offmsk = 0x007fffff; | |
572 | signbit = 0x00400000; | |
573 | break; | |
574 | ||
575 | default: | |
576 | abort (); | |
577 | } | |
578 | ||
579 | /* If this is an undefined symbol, return error */ | |
580 | if (symbol->section == &bfd_und_section | |
581 | && (symbol->flags & BSF_WEAK) == 0) | |
582 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
583 | ||
584 | /* If the sections are different, and we are doing a partial relocation, | |
585 | just ignore it for now. */ | |
586 | if (symbol->section->name != input_section->name | |
587 | && output_bfd != (bfd *)NULL) | |
588 | return bfd_reloc_continue; | |
589 | ||
590 | switch (btype) | |
591 | { | |
592 | case b9: | |
593 | case b12: | |
594 | relocation = ((target & dstmsk) << 1); | |
595 | break; | |
596 | ||
597 | case b23: | |
598 | if (bfd_big_endian (abfd)) | |
599 | relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4); | |
600 | else | |
601 | relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15); | |
602 | break; | |
603 | ||
604 | default: | |
605 | abort (); | |
606 | } | |
607 | ||
608 | relocation = (relocation ^ signbit) - signbit; /* Sign extend */ | |
609 | relocation += symbol->value; | |
610 | relocation += symbol->section->output_section->vma; | |
611 | relocation += symbol->section->output_offset; | |
612 | relocation += reloc_entry->addend; | |
613 | relocation -= input_section->output_section->vma; | |
614 | relocation -= input_section->output_offset; | |
615 | relocation -= addr; | |
616 | ||
617 | if (relocation & 1) | |
618 | return bfd_reloc_overflow; | |
619 | ||
620 | /* Check for overflow */ | |
621 | if (relocation & signbit) | |
622 | { | |
623 | if ((relocation & ~offmsk) != ~offmsk) | |
624 | flag = bfd_reloc_overflow; | |
625 | } | |
626 | else if (relocation & ~offmsk) | |
627 | flag = bfd_reloc_overflow; | |
628 | ||
629 | target &= ~dstmsk; | |
630 | switch (btype) | |
631 | { | |
632 | case b9: | |
633 | case b12: | |
634 | target |= (relocation >> 1); | |
635 | break; | |
636 | ||
637 | case b23: | |
638 | if (bfd_big_endian (abfd)) | |
639 | target |= ((relocation & 0xfff) >> 1) | ((relocation << 4) & 0x07ff0000); | |
640 | else | |
641 | target |= ((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff); | |
642 | break; | |
643 | ||
644 | default: | |
645 | abort (); | |
646 | } | |
647 | ||
648 | bfd_put_32 (abfd, target, (bfd_byte *) data + addr); | |
649 | ||
650 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
651 | Strictly this is only necessary if we are doing a partial relocation. */ | |
652 | reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D]; | |
653 | ||
654 | /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations */ | |
655 | return flag; | |
656 | } | |
657 | ||
658 | static bfd_reloc_status_type | |
659 | coff_thumb_pcrel_23 (abfd, reloc_entry, symbol, data, input_section, | |
660 | output_bfd, error_message) | |
661 | bfd *abfd; | |
662 | arelent *reloc_entry; | |
663 | asymbol *symbol; | |
664 | PTR data; | |
665 | asection *input_section; | |
666 | bfd *output_bfd; | |
667 | char **error_message; | |
668 | { | |
669 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
670 | input_section, output_bfd, error_message, b23); | |
671 | } | |
672 | ||
673 | static bfd_reloc_status_type | |
674 | coff_thumb_pcrel_12 (abfd, reloc_entry, symbol, data, input_section, | |
675 | output_bfd, error_message) | |
676 | bfd *abfd; | |
677 | arelent *reloc_entry; | |
678 | asymbol *symbol; | |
679 | PTR data; | |
680 | asection *input_section; | |
681 | bfd *output_bfd; | |
682 | char **error_message; | |
683 | { | |
684 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
685 | input_section, output_bfd, error_message, b12); | |
686 | } | |
687 | ||
688 | static bfd_reloc_status_type | |
689 | coff_thumb_pcrel_9 (abfd, reloc_entry, symbol, data, input_section, | |
690 | output_bfd, error_message) | |
691 | bfd *abfd; | |
692 | arelent *reloc_entry; | |
693 | asymbol *symbol; | |
694 | PTR data; | |
695 | asection *input_section; | |
696 | bfd *output_bfd; | |
697 | char **error_message; | |
698 | { | |
699 | return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, | |
700 | input_section, output_bfd, error_message, b9); | |
701 | } | |
702 | ||
703 | ||
704 | static CONST struct reloc_howto_struct * | |
705 | coff_arm_reloc_type_lookup (abfd, code) | |
706 | bfd * abfd; | |
707 | bfd_reloc_code_real_type code; | |
708 | { | |
af74ae99 NC |
709 | #define ASTD(i,j) case i: return aoutarm_std_reloc_howto + j |
710 | ||
252b5132 RH |
711 | if (code == BFD_RELOC_CTOR) |
712 | switch (bfd_get_arch_info (abfd)->bits_per_address) | |
713 | { | |
714 | case 32: | |
715 | code = BFD_RELOC_32; | |
716 | break; | |
717 | default: return (CONST struct reloc_howto_struct *) 0; | |
718 | } | |
719 | ||
720 | switch (code) | |
721 | { | |
722 | ASTD (BFD_RELOC_8, ARM_8); | |
723 | ASTD (BFD_RELOC_16, ARM_16); | |
724 | ASTD (BFD_RELOC_32, ARM_32); | |
725 | ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26); | |
726 | ASTD (BFD_RELOC_8_PCREL, ARM_DISP8); | |
727 | ASTD (BFD_RELOC_16_PCREL, ARM_DISP16); | |
728 | ASTD (BFD_RELOC_32_PCREL, ARM_DISP32); | |
729 | ASTD (BFD_RELOC_RVA, ARM_RVA32); | |
730 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9); | |
731 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12); | |
732 | ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23); | |
733 | default: return (CONST struct reloc_howto_struct *) 0; | |
734 | } | |
735 | } | |
736 | ||
737 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) | |
738 | #define COFF_PAGE_SIZE 0x1000 | |
739 | /* Turn a howto into a reloc nunmber */ | |
740 | ||
741 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
742 | #define BADMAG(x) ARMBADMAG(x) | |
743 | #define ARM 1 /* Customize coffcode.h */ | |
744 | ||
745 | /* Extend the coff_link_hash_table structure with a few ARM specific fields. | |
746 | This allows us to store global data here without actually creating any | |
747 | global variables, which is a no-no in the BFD world. */ | |
748 | struct coff_arm_link_hash_table | |
749 | { | |
750 | /* The original coff_link_hash_table structure. MUST be first field. */ | |
751 | struct coff_link_hash_table root; | |
752 | ||
753 | /* The size in bytes of the section containg the Thumb-to-ARM glue. */ | |
754 | long int thumb_glue_size; | |
755 | ||
756 | /* The size in bytes of the section containg the ARM-to-Thumb glue. */ | |
757 | long int arm_glue_size; | |
758 | ||
759 | /* An arbitary input BFD chosen to hold the glue sections. */ | |
760 | bfd * bfd_of_glue_owner; | |
761 | ||
762 | /* Support interworking with old, non-interworking aware ARM code. */ | |
763 | int support_old_code; | |
764 | }; | |
765 | ||
766 | /* Get the ARM coff linker hash table from a link_info structure. */ | |
767 | #define coff_arm_hash_table(info) \ | |
768 | ((struct coff_arm_link_hash_table *) ((info)->hash)) | |
769 | ||
770 | /* Create an ARM coff linker hash table. */ | |
771 | ||
772 | static struct bfd_link_hash_table * | |
773 | coff_arm_link_hash_table_create (abfd) | |
774 | bfd * abfd; | |
775 | { | |
776 | struct coff_arm_link_hash_table * ret; | |
777 | ||
778 | ret = ((struct coff_arm_link_hash_table *) | |
779 | bfd_alloc (abfd, sizeof (struct coff_arm_link_hash_table))); | |
780 | if (ret == (struct coff_arm_link_hash_table *) NULL) | |
781 | return NULL; | |
782 | ||
783 | if (! _bfd_coff_link_hash_table_init | |
784 | (& ret->root, abfd, _bfd_coff_link_hash_newfunc)) | |
785 | { | |
786 | bfd_release (abfd, ret); | |
787 | return (struct bfd_link_hash_table *) NULL; | |
788 | } | |
789 | ||
790 | ret->thumb_glue_size = 0; | |
791 | ret->arm_glue_size = 0; | |
792 | ret->bfd_of_glue_owner = NULL; | |
793 | ||
794 | return & ret->root.root; | |
795 | } | |
796 | ||
271025eb | 797 | static void |
252b5132 RH |
798 | arm_emit_base_file_entry (info, output_bfd, input_section, reloc_offset) |
799 | struct bfd_link_info *info; | |
800 | bfd *output_bfd; | |
801 | asection *input_section; | |
802 | bfd_vma reloc_offset; | |
803 | { | |
804 | bfd_vma addr = reloc_offset | |
805 | - input_section->vma | |
806 | + input_section->output_offset | |
807 | + input_section->output_section->vma; | |
808 | ||
809 | if (coff_data(output_bfd)->pe) | |
810 | addr -= pe_data(output_bfd)->pe_opthdr.ImageBase; | |
811 | fwrite (&addr, 1, sizeof (addr), (FILE *) info->base_file); | |
812 | ||
813 | } | |
814 | \f | |
815 | /* The thumb form of a long branch is a bit finicky, because the offset | |
816 | encoding is split over two fields, each in it's own instruction. They | |
817 | can occur in any order. So given a thumb form of long branch, and an | |
818 | offset, insert the offset into the thumb branch and return finished | |
819 | instruction. | |
820 | ||
821 | It takes two thumb instructions to encode the target address. Each has | |
822 | 11 bits to invest. The upper 11 bits are stored in one (identifed by | |
823 | H-0.. see below), the lower 11 bits are stored in the other (identified | |
824 | by H-1). | |
825 | ||
826 | Combine together and shifted left by 1 (it's a half word address) and | |
827 | there you have it. | |
828 | ||
829 | Op: 1111 = F, | |
830 | H-0, upper address-0 = 000 | |
831 | Op: 1111 = F, | |
832 | H-1, lower address-0 = 800 | |
833 | ||
834 | They can be ordered either way, but the arm tools I've seen always put | |
835 | the lower one first. It probably doesn't matter. krk@cygnus.com | |
836 | ||
837 | XXX: Actually the order does matter. The second instruction (H-1) | |
838 | moves the computed address into the PC, so it must be the second one | |
839 | in the sequence. The problem, however is that whilst little endian code | |
840 | stores the instructions in HI then LOW order, big endian code does the | |
841 | reverse. nickc@cygnus.com */ | |
842 | ||
843 | #define LOW_HI_ORDER 0xF800F000 | |
844 | #define HI_LOW_ORDER 0xF000F800 | |
845 | ||
846 | static insn32 | |
847 | insert_thumb_branch (br_insn, rel_off) | |
848 | insn32 br_insn; | |
849 | int rel_off; | |
850 | { | |
851 | unsigned int low_bits; | |
852 | unsigned int high_bits; | |
853 | ||
854 | ||
855 | BFD_ASSERT((rel_off & 1) != 1); | |
856 | ||
857 | rel_off >>= 1; /* half word aligned address */ | |
858 | low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */ | |
859 | high_bits = (rel_off >> 11) & 0x000007FF; /* the top 11 bits */ | |
860 | ||
861 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
862 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
863 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
864 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
865 | else | |
866 | abort(); /* error - not a valid branch instruction form */ | |
867 | ||
868 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ | |
869 | ||
870 | return br_insn; | |
871 | } | |
872 | ||
873 | \f | |
874 | static struct coff_link_hash_entry * | |
875 | find_thumb_glue (info, name, input_bfd) | |
876 | struct bfd_link_info * info; | |
877 | CONST char * name; | |
878 | bfd * input_bfd; | |
879 | { | |
880 | char * tmp_name; | |
881 | struct coff_link_hash_entry * myh; | |
882 | ||
883 | tmp_name = ((char *) | |
884 | bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1)); | |
885 | ||
886 | BFD_ASSERT (tmp_name); | |
887 | ||
888 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
889 | ||
890 | myh = coff_link_hash_lookup | |
891 | (coff_hash_table (info), tmp_name, false, false, true); | |
892 | ||
893 | if (myh == NULL) | |
894 | /* xgettext:c-format */ | |
895 | _bfd_error_handler (_("%s: unable to find THUMB glue '%s' for `%s'"), | |
896 | bfd_get_filename (input_bfd), tmp_name, name); | |
897 | ||
898 | free (tmp_name); | |
899 | ||
900 | return myh; | |
901 | } | |
902 | ||
903 | static struct coff_link_hash_entry * | |
904 | find_arm_glue (info, name, input_bfd) | |
905 | struct bfd_link_info * info; | |
906 | CONST char * name; | |
907 | bfd * input_bfd; | |
908 | { | |
909 | char * tmp_name; | |
910 | struct coff_link_hash_entry * myh; | |
911 | ||
912 | tmp_name = ((char *) | |
913 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
914 | ||
915 | BFD_ASSERT (tmp_name); | |
916 | ||
917 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
918 | ||
919 | myh = coff_link_hash_lookup | |
920 | (coff_hash_table (info), tmp_name, false, false, true); | |
921 | ||
922 | if (myh == NULL) | |
923 | /* xgettext:c-format */ | |
924 | _bfd_error_handler (_("%s: unable to find ARM glue '%s' for `%s'"), | |
925 | bfd_get_filename (input_bfd), tmp_name, name); | |
926 | ||
927 | free (tmp_name); | |
928 | ||
929 | return myh; | |
930 | } | |
931 | ||
932 | /* | |
933 | ARM->Thumb glue: | |
934 | ||
935 | .arm | |
936 | __func_from_arm: | |
937 | ldr r12, __func_addr | |
938 | bx r12 | |
939 | __func_addr: | |
940 | .word func @ behave as if you saw a ARM_32 reloc | |
941 | */ | |
942 | ||
943 | #define ARM2THUMB_GLUE_SIZE 12 | |
944 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
945 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
946 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
947 | ||
252b5132 RH |
948 | /* |
949 | Thumb->ARM: Thumb->(non-interworking aware) ARM | |
950 | ||
951 | .thumb .thumb | |
952 | .align 2 .align 2 | |
953 | __func_from_thumb: __func_from_thumb: | |
954 | bx pc push {r6, lr} | |
955 | nop ldr r6, __func_addr | |
956 | .arm mov lr, pc | |
957 | __func_change_to_arm: bx r6 | |
958 | b func .arm | |
959 | __func_back_to_thumb: | |
960 | ldmia r13! {r6, lr} | |
961 | bx lr | |
962 | __func_addr: | |
963 | .word func | |
964 | */ | |
965 | ||
966 | #define THUMB2ARM_GLUE_SIZE (globals->support_old_code ? 20 : 8) | |
967 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
968 | static const insn16 t2a2_noop_insn = 0x46c0; | |
969 | static const insn32 t2a3_b_insn = 0xea000000; | |
970 | ||
252b5132 RH |
971 | static const insn16 t2a1_push_insn = 0xb540; |
972 | static const insn16 t2a2_ldr_insn = 0x4e03; | |
973 | static const insn16 t2a3_mov_insn = 0x46fe; | |
974 | static const insn16 t2a4_bx_insn = 0x4730; | |
975 | static const insn32 t2a5_pop_insn = 0xe8bd4040; | |
976 | static const insn32 t2a6_bx_insn = 0xe12fff1e; | |
977 | ||
978 | /* TODO: | |
979 | We should really create new local (static) symbols in destination | |
980 | object for each stub we create. We should also create local | |
981 | (static) symbols within the stubs when switching between ARM and | |
982 | Thumb code. This will ensure that the debugger and disassembler | |
983 | can present a better view of stubs. | |
984 | ||
985 | We can treat stubs like literal sections, and for the THUMB9 ones | |
986 | (short addressing range) we should be able to insert the stubs | |
987 | between sections. i.e. the simplest approach (since relocations | |
988 | are done on a section basis) is to dump the stubs at the end of | |
989 | processing a section. That way we can always try and minimise the | |
990 | offset to and from a stub. However, this does not map well onto | |
991 | the way that the linker/BFD does its work: mapping all input | |
992 | sections to output sections via the linker script before doing | |
993 | all the processing. | |
994 | ||
995 | Unfortunately it may be easier to just to disallow short range | |
996 | Thumb->ARM stubs (i.e. no conditional inter-working branches, | |
997 | only branch-and-link (BL) calls. This will simplify the processing | |
998 | since we can then put all of the stubs into their own section. | |
999 | ||
1000 | TODO: | |
1001 | On a different subject, rather than complaining when a | |
1002 | branch cannot fit in the number of bits available for the | |
1003 | instruction we should generate a trampoline stub (needed to | |
1004 | address the complete 32bit address space). */ | |
1005 | ||
1006 | /* The standard COFF backend linker does not cope with the special | |
1007 | Thumb BRANCH23 relocation. The alternative would be to split the | |
1008 | BRANCH23 into seperate HI23 and LO23 relocations. However, it is a | |
1009 | bit simpler simply providing our own relocation driver. */ | |
1010 | ||
1011 | /* The reloc processing routine for the ARM/Thumb COFF linker. NOTE: | |
1012 | This code is a very slightly modified copy of | |
1013 | _bfd_coff_generic_relocate_section. It would be a much more | |
1014 | maintainable solution to have a MACRO that could be expanded within | |
1015 | _bfd_coff_generic_relocate_section that would only be provided for | |
1016 | ARM/Thumb builds. It is only the code marked THUMBEXTENSION that | |
1017 | is different from the original. */ | |
1018 | ||
1019 | static boolean | |
1020 | coff_arm_relocate_section (output_bfd, info, input_bfd, input_section, | |
1021 | contents, relocs, syms, sections) | |
1022 | bfd *output_bfd; | |
1023 | struct bfd_link_info *info; | |
1024 | bfd *input_bfd; | |
1025 | asection *input_section; | |
1026 | bfd_byte *contents; | |
1027 | struct internal_reloc *relocs; | |
1028 | struct internal_syment *syms; | |
1029 | asection **sections; | |
1030 | { | |
1031 | struct internal_reloc * rel; | |
1032 | struct internal_reloc * relend; | |
1033 | ||
1034 | rel = relocs; | |
1035 | relend = rel + input_section->reloc_count; | |
1036 | ||
1037 | for (; rel < relend; rel++) | |
1038 | { | |
1039 | int done = 0; | |
1040 | long symndx; | |
1041 | struct coff_link_hash_entry * h; | |
1042 | struct internal_syment * sym; | |
1043 | bfd_vma addend; | |
1044 | bfd_vma val; | |
1045 | reloc_howto_type * howto; | |
1046 | bfd_reloc_status_type rstat; | |
1047 | bfd_vma h_val; | |
1048 | ||
1049 | symndx = rel->r_symndx; | |
1050 | ||
1051 | if (symndx == -1) | |
1052 | { | |
1053 | h = NULL; | |
1054 | sym = NULL; | |
1055 | } | |
1056 | else | |
1057 | { | |
1058 | h = obj_coff_sym_hashes (input_bfd)[symndx]; | |
1059 | sym = syms + symndx; | |
1060 | } | |
1061 | ||
1062 | /* COFF treats common symbols in one of two ways. Either the | |
1063 | size of the symbol is included in the section contents, or it | |
1064 | is not. We assume that the size is not included, and force | |
1065 | the rtype_to_howto function to adjust the addend as needed. */ | |
1066 | ||
1067 | if (sym != NULL && sym->n_scnum != 0) | |
1068 | addend = - sym->n_value; | |
1069 | else | |
1070 | addend = 0; | |
1071 | ||
1072 | ||
1073 | howto = coff_rtype_to_howto (input_bfd, input_section, rel, h, | |
1074 | sym, &addend); | |
1075 | if (howto == NULL) | |
1076 | return false; | |
1077 | ||
1078 | /* The relocation_section function will skip pcrel_offset relocs | |
1079 | when doing a relocateable link. However, we want to convert | |
1080 | ARM26 to ARM26D relocs if possible. We return a fake howto in | |
1081 | this case without pcrel_offset set, and adjust the addend to | |
1082 | compensate. */ | |
1083 | if (rel->r_type == ARM_26 | |
1084 | && h != NULL | |
1085 | && info->relocateable | |
1086 | && (h->root.type == bfd_link_hash_defined | |
1087 | || h->root.type == bfd_link_hash_defweak) | |
1088 | && h->root.u.def.section->output_section == input_section->output_section) | |
1089 | { | |
1090 | static reloc_howto_type fake_arm26_reloc = | |
1091 | HOWTO (ARM_26, | |
1092 | 2, | |
1093 | 2, | |
1094 | 24, | |
1095 | true, | |
1096 | 0, | |
1097 | complain_overflow_signed, | |
1098 | aoutarm_fix_pcrel_26 , | |
1099 | "ARM_26", | |
1100 | false, | |
1101 | 0x00ffffff, | |
1102 | 0x00ffffff, | |
1103 | false); | |
1104 | ||
1105 | addend -= rel->r_vaddr - input_section->vma; | |
1106 | howto = &fake_arm26_reloc; | |
1107 | } | |
1108 | ||
1109 | /* If we are doing a relocateable link, then we can just ignore | |
1110 | a PC relative reloc that is pcrel_offset. It will already | |
1111 | have the correct value. If this is not a relocateable link, | |
1112 | then we should ignore the symbol value. */ | |
1113 | if (howto->pc_relative && howto->pcrel_offset) | |
1114 | { | |
1115 | if (info->relocateable) | |
1116 | continue; | |
1117 | if (sym != NULL && sym->n_scnum != 0) | |
1118 | addend += sym->n_value; | |
1119 | } | |
1120 | ||
1121 | val = 0; | |
1122 | ||
1123 | if (h == NULL) | |
1124 | { | |
1125 | asection *sec; | |
1126 | ||
1127 | if (symndx == -1) | |
1128 | { | |
1129 | sec = bfd_abs_section_ptr; | |
1130 | val = 0; | |
1131 | } | |
1132 | else | |
1133 | { | |
1134 | sec = sections[symndx]; | |
1135 | val = (sec->output_section->vma | |
1136 | + sec->output_offset | |
1137 | + sym->n_value | |
1138 | - sec->vma); | |
1139 | } | |
1140 | } | |
1141 | else | |
1142 | { | |
1143 | #if 1 /* THUMBEXTENSION */ | |
1144 | /* We don't output the stubs if we are generating a | |
1145 | relocatable output file, since we may as well leave the | |
1146 | stub generation to the final linker pass. If we fail to | |
1147 | verify that the name is defined, we'll try to build stubs | |
1148 | for an undefined name... */ | |
1149 | if (! info->relocateable | |
1150 | && ( h->root.type == bfd_link_hash_defined | |
1151 | || h->root.type == bfd_link_hash_defweak)) | |
1152 | { | |
1153 | asection * h_sec = h->root.u.def.section; | |
1154 | const char * name = h->root.root.string; | |
1155 | ||
1156 | /* h locates the symbol referenced in the reloc. */ | |
1157 | h_val = (h->root.u.def.value | |
1158 | + h_sec->output_section->vma | |
1159 | + h_sec->output_offset); | |
1160 | ||
1161 | if (howto->type == ARM_26) | |
1162 | { | |
1163 | if ( h->class == C_THUMBSTATFUNC | |
1164 | || h->class == C_THUMBEXTFUNC) | |
1165 | { | |
1166 | /* Arm code calling a Thumb function */ | |
1167 | unsigned long int tmp; | |
1168 | long int my_offset; | |
1169 | asection * s; | |
1170 | long int ret_offset; | |
1171 | struct coff_link_hash_entry * myh; | |
1172 | struct coff_arm_link_hash_table * globals; | |
1173 | ||
1174 | myh = find_arm_glue (info, name, input_bfd); | |
1175 | if (myh == NULL) | |
1176 | return false; | |
1177 | ||
1178 | globals = coff_arm_hash_table (info); | |
1179 | ||
1180 | BFD_ASSERT (globals != NULL); | |
1181 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1182 | ||
1183 | my_offset = myh->root.u.def.value; | |
1184 | ||
1185 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1186 | ARM2THUMB_GLUE_SECTION_NAME); | |
1187 | BFD_ASSERT (s != NULL); | |
1188 | BFD_ASSERT (s->contents != NULL); | |
1189 | BFD_ASSERT (s->output_section != NULL); | |
1190 | ||
1191 | if ((my_offset & 0x01) == 0x01) | |
1192 | { | |
1193 | if (h_sec->owner != NULL | |
1194 | && INTERWORK_SET (h_sec->owner) | |
1195 | && ! INTERWORK_FLAG (h_sec->owner)) | |
1196 | { | |
1197 | _bfd_error_handler | |
1198 | /* xgettext:c-format */ | |
1199 | (_("%s(%s): warning: interworking not enabled."), | |
1200 | bfd_get_filename (h_sec->owner), name); | |
1201 | _bfd_error_handler | |
1202 | /* xgettext:c-format */ | |
1203 | (_(" first occurrence: %s: arm call to thumb"), | |
1204 | bfd_get_filename (input_bfd)); | |
1205 | } | |
1206 | ||
1207 | --my_offset; | |
1208 | myh->root.u.def.value = my_offset; | |
1209 | ||
1210 | bfd_put_32 (output_bfd, a2t1_ldr_insn, | |
1211 | s->contents + my_offset); | |
1212 | ||
1213 | bfd_put_32 (output_bfd, a2t2_bx_r12_insn, | |
1214 | s->contents + my_offset + 4); | |
1215 | ||
1216 | /* It's a thumb address. Add the low order bit. */ | |
1217 | bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn, | |
1218 | s->contents + my_offset + 8); | |
1219 | ||
1220 | if (info->base_file) | |
1ceea514 | 1221 | arm_emit_base_file_entry (info, output_bfd, s, |
fa0e42e4 | 1222 | my_offset + 8); |
252b5132 RH |
1223 | |
1224 | } | |
1225 | ||
1226 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
1227 | ||
1228 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr | |
1229 | - input_section->vma); | |
1230 | ||
1231 | tmp = tmp & 0xFF000000; | |
1232 | ||
1233 | /* Somehow these are both 4 too far, so subtract 8. */ | |
1234 | ret_offset = | |
1235 | s->output_offset | |
1236 | + my_offset | |
1237 | + s->output_section->vma | |
1238 | - (input_section->output_offset | |
1239 | + input_section->output_section->vma | |
1240 | + rel->r_vaddr) | |
1241 | - 8; | |
1242 | ||
1243 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); | |
1244 | ||
1245 | bfd_put_32 (output_bfd, tmp, contents + rel->r_vaddr | |
1246 | - input_section->vma); | |
252b5132 RH |
1247 | done = 1; |
1248 | } | |
1249 | } | |
1250 | ||
1251 | /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12 */ | |
1252 | else if (howto->type == ARM_THUMB23) | |
1253 | { | |
1254 | if ( h->class == C_EXT | |
1255 | || h->class == C_STAT | |
1256 | || h->class == C_LABEL) | |
1257 | { | |
1258 | /* Thumb code calling an ARM function */ | |
1259 | asection * s = 0; | |
1260 | long int my_offset; | |
1261 | unsigned long int tmp; | |
1262 | long int ret_offset; | |
1263 | struct coff_link_hash_entry * myh; | |
1264 | struct coff_arm_link_hash_table * globals; | |
1265 | ||
1266 | myh = find_thumb_glue (info, name, input_bfd); | |
1267 | if (myh == NULL) | |
1268 | return false; | |
1269 | ||
1270 | globals = coff_arm_hash_table (info); | |
1271 | ||
1272 | BFD_ASSERT (globals != NULL); | |
1273 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1274 | ||
1275 | my_offset = myh->root.u.def.value; | |
1276 | ||
1277 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1278 | THUMB2ARM_GLUE_SECTION_NAME); | |
1279 | ||
1280 | BFD_ASSERT (s != NULL); | |
1281 | BFD_ASSERT (s->contents != NULL); | |
1282 | BFD_ASSERT (s->output_section != NULL); | |
1283 | ||
1284 | if ((my_offset & 0x01) == 0x01) | |
1285 | { | |
1286 | if (h_sec->owner != NULL | |
1287 | && INTERWORK_SET (h_sec->owner) | |
1288 | && ! INTERWORK_FLAG (h_sec->owner) | |
1289 | && ! globals->support_old_code) | |
1290 | { | |
1291 | _bfd_error_handler | |
1292 | /* xgettext:c-format */ | |
1293 | (_("%s(%s): warning: interworking not enabled."), | |
1294 | bfd_get_filename (h_sec->owner), name); | |
1295 | _bfd_error_handler | |
1296 | /* xgettext:c-format */ | |
1297 | (_(" first occurrence: %s: thumb call to arm"), | |
1298 | bfd_get_filename (input_bfd)); | |
1299 | _bfd_error_handler | |
1300 | (_(" consider relinking with --support-old-code enabled")); | |
1301 | } | |
1302 | ||
1303 | -- my_offset; | |
1304 | myh->root.u.def.value = my_offset; | |
1305 | ||
1306 | if (globals->support_old_code) | |
1307 | { | |
1308 | bfd_put_16 (output_bfd, t2a1_push_insn, | |
1309 | s->contents + my_offset); | |
1310 | ||
1311 | bfd_put_16 (output_bfd, t2a2_ldr_insn, | |
1312 | s->contents + my_offset + 2); | |
1313 | ||
1314 | bfd_put_16 (output_bfd, t2a3_mov_insn, | |
1315 | s->contents + my_offset + 4); | |
1316 | ||
1317 | bfd_put_16 (output_bfd, t2a4_bx_insn, | |
1318 | s->contents + my_offset + 6); | |
1319 | ||
1320 | bfd_put_32 (output_bfd, t2a5_pop_insn, | |
1321 | s->contents + my_offset + 8); | |
1322 | ||
1323 | bfd_put_32 (output_bfd, t2a6_bx_insn, | |
1324 | s->contents + my_offset + 12); | |
1325 | ||
1326 | /* Store the address of the function in the last word of the stub. */ | |
1327 | bfd_put_32 (output_bfd, h_val, | |
1328 | s->contents + my_offset + 16); | |
fa0e42e4 CM |
1329 | |
1330 | if (info->base_file) | |
1331 | arm_emit_base_file_entry (info, output_bfd, s, my_offset + 16); | |
252b5132 RH |
1332 | } |
1333 | else | |
1334 | { | |
1335 | bfd_put_16 (output_bfd, t2a1_bx_pc_insn, | |
1336 | s->contents + my_offset); | |
1337 | ||
1338 | bfd_put_16 (output_bfd, t2a2_noop_insn, | |
1339 | s->contents + my_offset + 2); | |
1340 | ||
1341 | ret_offset = | |
1342 | ((bfd_signed_vma) h_val) /* Address of destination of the stub */ | |
1343 | - ((bfd_signed_vma) | |
1344 | (s->output_offset /* Offset from the start of the current section to the start of the stubs. */ | |
1345 | + my_offset /* Offset of the start of this stub from the start of the stubs. */ | |
1346 | + s->output_section->vma) /* Address of the start of the current section. */ | |
1347 | + 4 /* The branch instruction is 4 bytes into the stub. */ | |
1348 | + 8); /* ARM branches work from the pc of the instruction + 8. */ | |
1349 | ||
1350 | bfd_put_32 (output_bfd, | |
1351 | t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), | |
1352 | s->contents + my_offset + 4); | |
1353 | ||
252b5132 RH |
1354 | } |
1355 | } | |
1356 | ||
1357 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
1358 | ||
1359 | /* Now go back and fix up the original BL insn to point | |
1360 | to here. */ | |
1361 | ret_offset = | |
1362 | s->output_offset | |
1363 | + my_offset | |
1364 | - (input_section->output_offset | |
1365 | + rel->r_vaddr) | |
1366 | -4; | |
1367 | ||
1368 | tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr | |
1369 | - input_section->vma); | |
1370 | ||
1371 | bfd_put_32 (output_bfd, | |
1372 | insert_thumb_branch (tmp, ret_offset), | |
1373 | contents + rel->r_vaddr | |
1374 | - input_section->vma); | |
1375 | ||
252b5132 RH |
1376 | done = 1; |
1377 | } | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | /* If the relocation type and destination symbol does not | |
1382 | fall into one of the above categories, then we can just | |
1383 | perform a direct link. */ | |
1384 | ||
1385 | if (done) | |
1386 | rstat = bfd_reloc_ok; | |
1387 | else | |
1388 | #endif /* THUMBEXTENSION */ | |
1389 | if ( h->root.type == bfd_link_hash_defined | |
1390 | || h->root.type == bfd_link_hash_defweak) | |
1391 | { | |
1392 | asection *sec; | |
1393 | ||
1394 | sec = h->root.u.def.section; | |
1395 | val = (h->root.u.def.value | |
1396 | + sec->output_section->vma | |
1397 | + sec->output_offset); | |
1398 | } | |
1399 | ||
1400 | else if (! info->relocateable) | |
1401 | { | |
1402 | if (! ((*info->callbacks->undefined_symbol) | |
1403 | (info, h->root.root.string, input_bfd, input_section, | |
1404 | rel->r_vaddr - input_section->vma))) | |
1405 | return false; | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | if (info->base_file) | |
1410 | { | |
1411 | /* Emit a reloc if the backend thinks it needs it. */ | |
1412 | if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto)) | |
1413 | arm_emit_base_file_entry (info, output_bfd, input_section, rel->r_vaddr); | |
1414 | } | |
1415 | ||
1416 | #if 1 /* THUMBEXTENSION */ | |
1417 | if (done) | |
1418 | rstat = bfd_reloc_ok; | |
1419 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ | |
1420 | else if (! info->relocateable | |
1421 | && howto->type == ARM_THUMB23) | |
1422 | { | |
1423 | /* This is pretty much a copy of what the default | |
1424 | _bfd_final_link_relocate and _bfd_relocate_contents | |
1425 | routines do to perform a relocation, with special | |
1426 | processing for the split addressing of the Thumb BL | |
1427 | instruction. Again, it would probably be simpler adding a | |
1428 | ThumbBRANCH23 specific macro expansion into the default | |
1429 | code. */ | |
1430 | ||
1431 | bfd_vma address = rel->r_vaddr - input_section->vma; | |
1432 | ||
1433 | if (address > input_section->_raw_size) | |
1434 | rstat = bfd_reloc_outofrange; | |
1435 | else | |
1436 | { | |
1437 | bfd_vma relocation = val + addend; | |
1438 | int size = bfd_get_reloc_size (howto); | |
1439 | boolean overflow = false; | |
1440 | bfd_byte * location = contents + address; | |
1441 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1442 | bfd_vma src_mask = 0x007FFFFE; | |
1443 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; | |
1444 | bfd_signed_vma reloc_signed_min = ~reloc_signed_max; | |
1445 | bfd_vma check; | |
1446 | bfd_signed_vma signed_check; | |
1447 | bfd_vma add; | |
1448 | bfd_signed_vma signed_add; | |
1449 | ||
1450 | BFD_ASSERT (size == 4); | |
1451 | ||
1452 | /* howto->pc_relative should be TRUE for type 14 BRANCH23 */ | |
1453 | relocation -= (input_section->output_section->vma | |
1454 | + input_section->output_offset); | |
1455 | ||
1456 | /* howto->pcrel_offset should be TRUE for type 14 BRANCH23 */ | |
1457 | relocation -= address; | |
1458 | ||
1459 | /* No need to negate the relocation with BRANCH23. */ | |
1460 | /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */ | |
1461 | /* howto->rightshift == 1 */ | |
1462 | /* Drop unwanted bits from the value we are relocating to. */ | |
1463 | ||
1464 | check = relocation >> howto->rightshift; | |
1465 | ||
1466 | /* If this is a signed value, the rightshift just dropped | |
1467 | leading 1 bits (assuming twos complement). */ | |
1468 | if ((bfd_signed_vma) relocation >= 0) | |
1469 | signed_check = check; | |
1470 | else | |
1471 | signed_check = (check | |
1472 | | ((bfd_vma) - 1 | |
1473 | & ~((bfd_vma) - 1 >> howto->rightshift))); | |
1474 | ||
1475 | /* Get the value from the object file. */ | |
1476 | if (bfd_big_endian (input_bfd)) | |
1477 | { | |
1478 | add = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1); | |
1479 | } | |
1480 | else | |
1481 | { | |
1482 | add = ((((x) & 0x7ff) << 12) | (((x) & 0x07ff0000) >> 15)); | |
1483 | } | |
1484 | ||
1485 | /* Get the value from the object file with an appropriate sign. | |
1486 | The expression involving howto->src_mask isolates the upper | |
1487 | bit of src_mask. If that bit is set in the value we are | |
1488 | adding, it is negative, and we subtract out that number times | |
1489 | two. If src_mask includes the highest possible bit, then we | |
1490 | can not get the upper bit, but that does not matter since | |
1491 | signed_add needs no adjustment to become negative in that | |
1492 | case. */ | |
1493 | ||
1494 | signed_add = add; | |
1495 | ||
1496 | if ((add & (((~ src_mask) >> 1) & src_mask)) != 0) | |
1497 | signed_add -= (((~ src_mask) >> 1) & src_mask) << 1; | |
1498 | ||
1499 | /* Add the value from the object file, shifted so that it is a | |
1500 | straight number. */ | |
1501 | /* howto->bitpos == 0 */ | |
1502 | ||
1503 | signed_check += signed_add; | |
1504 | relocation += signed_add; | |
1505 | ||
1506 | BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed); | |
1507 | ||
1508 | /* Assumes two's complement. */ | |
1509 | if ( signed_check > reloc_signed_max | |
1510 | || signed_check < reloc_signed_min) | |
1511 | overflow = true; | |
1512 | ||
1513 | /* Put RELOCATION into the correct bits: */ | |
1514 | ||
1515 | if (bfd_big_endian (input_bfd)) | |
1516 | { | |
1517 | relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000)); | |
1518 | } | |
1519 | else | |
1520 | { | |
1521 | relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff)); | |
1522 | } | |
1523 | ||
1524 | /* Add RELOCATION to the correct bits of X: */ | |
1525 | x = ((x & ~howto->dst_mask) | relocation); | |
1526 | ||
1527 | /* Put the relocated value back in the object file: */ | |
1528 | bfd_put_32 (input_bfd, x, location); | |
1529 | ||
1530 | rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok; | |
1531 | } | |
1532 | } | |
1533 | else | |
1534 | #endif /* THUMBEXTENSION */ | |
1535 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1536 | contents, | |
1537 | rel->r_vaddr - input_section->vma, | |
1538 | val, addend); | |
1539 | #if 1 /* THUMBEXTENSION */ | |
1540 | /* FIXME: | |
1541 | Is this the best way to fix up thumb addresses? krk@cygnus.com | |
1542 | Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */ | |
1543 | /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */ | |
1544 | if (! info->relocateable | |
b44267fd | 1545 | && (rel->r_type == ARM_32 || rel->r_type == ARM_RVA32)) |
252b5132 RH |
1546 | { |
1547 | /* Determine if we need to set the bottom bit of a relocated address | |
1548 | because the address is the address of a Thumb code symbol. */ | |
1549 | ||
1550 | int patchit = false; | |
1551 | ||
1552 | if (h != NULL | |
1553 | && ( h->class == C_THUMBSTATFUNC | |
1554 | || h->class == C_THUMBEXTFUNC)) | |
1555 | { | |
1556 | patchit = true; | |
1557 | } | |
1558 | else if (sym != NULL | |
1559 | && sym->n_scnum > N_UNDEF) | |
1560 | { | |
1561 | /* No hash entry - use the symbol instead. */ | |
1562 | ||
1563 | if ( sym->n_sclass == C_THUMBSTATFUNC | |
1564 | || sym->n_sclass == C_THUMBEXTFUNC) | |
1565 | patchit = true; | |
1566 | } | |
1567 | ||
1568 | if (patchit) | |
1569 | { | |
1570 | bfd_byte * location = contents + rel->r_vaddr - input_section->vma; | |
1571 | bfd_vma x = bfd_get_32 (input_bfd, location); | |
1572 | ||
1573 | bfd_put_32 (input_bfd, x | 1, location); | |
1574 | } | |
1575 | } | |
1576 | #endif /* THUMBEXTENSION */ | |
1577 | ||
1578 | switch (rstat) | |
1579 | { | |
1580 | default: | |
1581 | abort (); | |
1582 | case bfd_reloc_ok: | |
1583 | break; | |
1584 | case bfd_reloc_outofrange: | |
1585 | (*_bfd_error_handler) | |
1586 | (_("%s: bad reloc address 0x%lx in section `%s'"), | |
1587 | bfd_get_filename (input_bfd), | |
1588 | (unsigned long) rel->r_vaddr, | |
1589 | bfd_get_section_name (input_bfd, input_section)); | |
1590 | return false; | |
1591 | case bfd_reloc_overflow: | |
1592 | { | |
1593 | const char *name; | |
1594 | char buf[SYMNMLEN + 1]; | |
1595 | ||
1596 | if (symndx == -1) | |
1597 | name = "*ABS*"; | |
1598 | else if (h != NULL) | |
1599 | name = h->root.root.string; | |
1600 | else | |
1601 | { | |
1602 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); | |
1603 | if (name == NULL) | |
1604 | return false; | |
1605 | } | |
1606 | ||
1607 | if (! ((*info->callbacks->reloc_overflow) | |
1608 | (info, name, howto->name, (bfd_vma) 0, input_bfd, | |
1609 | input_section, rel->r_vaddr - input_section->vma))) | |
1610 | return false; | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | return true; | |
1616 | } | |
1617 | ||
e049a0de ILT |
1618 | #ifndef COFF_IMAGE_WITH_PE |
1619 | ||
252b5132 RH |
1620 | boolean |
1621 | bfd_arm_allocate_interworking_sections (info) | |
1622 | struct bfd_link_info * info; | |
1623 | { | |
1624 | asection * s; | |
1625 | bfd_byte * foo; | |
1626 | struct coff_arm_link_hash_table * globals; | |
1627 | #if 0 | |
1628 | static char test_char = '1'; | |
1629 | #endif | |
1630 | ||
1631 | globals = coff_arm_hash_table (info); | |
1632 | ||
1633 | BFD_ASSERT (globals != NULL); | |
1634 | ||
1635 | if (globals->arm_glue_size != 0) | |
1636 | { | |
1637 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1638 | ||
1639 | s = bfd_get_section_by_name | |
1640 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
1641 | ||
1642 | BFD_ASSERT (s != NULL); | |
1643 | ||
1644 | foo = (bfd_byte *) bfd_alloc | |
1645 | (globals->bfd_of_glue_owner, globals->arm_glue_size); | |
1646 | #if 0 | |
1647 | memset (foo, test_char, globals->arm_glue_size); | |
1648 | #endif | |
1649 | ||
1650 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; | |
1651 | s->contents = foo; | |
1652 | } | |
1653 | ||
1654 | if (globals->thumb_glue_size != 0) | |
1655 | { | |
1656 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1657 | ||
1658 | s = bfd_get_section_by_name | |
1659 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1660 | ||
1661 | BFD_ASSERT (s != NULL); | |
1662 | ||
1663 | foo = (bfd_byte *) bfd_alloc | |
1664 | (globals->bfd_of_glue_owner, globals->thumb_glue_size); | |
1665 | #if 0 | |
1666 | memset (foo, test_char, globals->thumb_glue_size); | |
1667 | #endif | |
1668 | ||
1669 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; | |
1670 | s->contents = foo; | |
1671 | } | |
1672 | ||
1673 | return true; | |
1674 | } | |
1675 | ||
1676 | static void | |
1677 | record_arm_to_thumb_glue (info, h) | |
1678 | struct bfd_link_info * info; | |
1679 | struct coff_link_hash_entry * h; | |
1680 | { | |
1681 | const char * name = h->root.root.string; | |
1682 | register asection * s; | |
1683 | char * tmp_name; | |
1684 | struct coff_link_hash_entry * myh; | |
1685 | struct coff_arm_link_hash_table * globals; | |
1686 | ||
1687 | globals = coff_arm_hash_table (info); | |
1688 | ||
1689 | BFD_ASSERT (globals != NULL); | |
1690 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1691 | ||
1692 | s = bfd_get_section_by_name | |
1693 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
1694 | ||
1695 | BFD_ASSERT (s != NULL); | |
1696 | ||
1697 | tmp_name = ((char *) | |
1698 | bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1)); | |
1699 | ||
1700 | BFD_ASSERT (tmp_name); | |
1701 | ||
1702 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
1703 | ||
1704 | myh = coff_link_hash_lookup | |
1705 | (coff_hash_table (info), tmp_name, false, false, true); | |
1706 | ||
1707 | if (myh != NULL) | |
1708 | { | |
1709 | free (tmp_name); | |
1710 | return; /* we've already seen this guy */ | |
1711 | } | |
1712 | ||
1713 | /* The only trick here is using globals->arm_glue_size as the value. Even | |
1714 | though the section isn't allocated yet, this is where we will be putting | |
1715 | it. */ | |
1716 | ||
1717 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
1718 | BSF_GLOBAL, | |
1719 | s, globals->arm_glue_size + 1, | |
1720 | NULL, true, false, | |
1721 | (struct bfd_link_hash_entry **) & myh); | |
1722 | ||
1723 | free (tmp_name); | |
1724 | ||
1725 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
1726 | ||
1727 | return; | |
1728 | } | |
1729 | ||
1730 | static void | |
1731 | record_thumb_to_arm_glue (info, h) | |
1732 | struct bfd_link_info * info; | |
1733 | struct coff_link_hash_entry * h; | |
1734 | { | |
1735 | const char * name = h->root.root.string; | |
1736 | register asection * s; | |
1737 | char * tmp_name; | |
1738 | struct coff_link_hash_entry * myh; | |
1739 | struct coff_arm_link_hash_table * globals; | |
1740 | ||
1741 | ||
1742 | globals = coff_arm_hash_table (info); | |
1743 | ||
1744 | BFD_ASSERT (globals != NULL); | |
1745 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1746 | ||
1747 | s = bfd_get_section_by_name | |
1748 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1749 | ||
1750 | BFD_ASSERT (s != NULL); | |
1751 | ||
1752 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
1753 | ||
1754 | BFD_ASSERT (tmp_name); | |
1755 | ||
1756 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
1757 | ||
1758 | myh = coff_link_hash_lookup | |
1759 | (coff_hash_table (info), tmp_name, false, false, true); | |
1760 | ||
1761 | if (myh != NULL) | |
1762 | { | |
1763 | free (tmp_name); | |
1764 | return; /* we've already seen this guy */ | |
1765 | } | |
1766 | ||
1767 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
1768 | BSF_GLOBAL, s, globals->thumb_glue_size + 1, | |
1769 | NULL, true, false, | |
1770 | (struct bfd_link_hash_entry **) & myh); | |
1771 | ||
1772 | /* If we mark it 'thumb', the disassembler will do a better job. */ | |
1773 | myh->class = C_THUMBEXTFUNC; | |
1774 | ||
1775 | free (tmp_name); | |
1776 | ||
1777 | /* Allocate another symbol to mark where we switch to arm mode. */ | |
1778 | ||
1779 | #define CHANGE_TO_ARM "__%s_change_to_arm" | |
1780 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
1781 | ||
1782 | tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1); | |
1783 | ||
1784 | BFD_ASSERT (tmp_name); | |
1785 | ||
1786 | sprintf (tmp_name, globals->support_old_code ? BACK_FROM_ARM : CHANGE_TO_ARM, name); | |
1787 | ||
1788 | myh = NULL; | |
1789 | ||
1790 | bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name, | |
1791 | BSF_LOCAL, s, globals->thumb_glue_size | |
1792 | + (globals->support_old_code ? 8 : 4), | |
1793 | NULL, true, false, | |
1794 | (struct bfd_link_hash_entry **) & myh); | |
1795 | ||
1796 | free (tmp_name); | |
1797 | ||
1798 | globals->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
1799 | ||
1800 | return; | |
1801 | } | |
1802 | ||
1803 | /* Select a BFD to be used to hold the sections used by the glue code. | |
1804 | This function is called from the linker scripts in ld/emultempl/ | |
1805 | {armcoff/pe}.em */ | |
e049a0de | 1806 | |
252b5132 RH |
1807 | boolean |
1808 | bfd_arm_get_bfd_for_interworking (abfd, info) | |
1809 | bfd * abfd; | |
1810 | struct bfd_link_info * info; | |
1811 | { | |
1812 | struct coff_arm_link_hash_table * globals; | |
1813 | flagword flags; | |
1814 | asection * sec; | |
1815 | ||
1816 | /* If we are only performing a partial link do not bother | |
1817 | getting a bfd to hold the glue. */ | |
1818 | if (info->relocateable) | |
1819 | return true; | |
1820 | ||
1821 | globals = coff_arm_hash_table (info); | |
1822 | ||
1823 | BFD_ASSERT (globals != NULL); | |
1824 | ||
1825 | if (globals->bfd_of_glue_owner != NULL) | |
1826 | return true; | |
1827 | ||
1828 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
1829 | ||
1830 | if (sec == NULL) | |
1831 | { | |
ba3d4249 | 1832 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
1833 | |
1834 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
1835 | ||
1836 | if (sec == NULL | |
1837 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1838 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1839 | return false; | |
1840 | } | |
1841 | ||
1842 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1843 | ||
1844 | if (sec == NULL) | |
1845 | { | |
ba3d4249 | 1846 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
1847 | |
1848 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1849 | ||
1850 | if (sec == NULL | |
1851 | || ! bfd_set_section_flags (abfd, sec, flags) | |
1852 | || ! bfd_set_section_alignment (abfd, sec, 2)) | |
1853 | return false; | |
1854 | } | |
1855 | ||
1856 | /* Save the bfd for later use. */ | |
1857 | globals->bfd_of_glue_owner = abfd; | |
1858 | ||
1859 | return true; | |
1860 | } | |
1861 | ||
1862 | boolean | |
1863 | bfd_arm_process_before_allocation (abfd, info, support_old_code) | |
1864 | bfd * abfd; | |
1865 | struct bfd_link_info * info; | |
1866 | int support_old_code; | |
1867 | { | |
1868 | asection * sec; | |
1869 | struct coff_arm_link_hash_table * globals; | |
1870 | ||
1871 | /* If we are only performing a partial link do not bother | |
1872 | to construct any glue. */ | |
1873 | if (info->relocateable) | |
1874 | return true; | |
1875 | ||
1876 | /* Here we have a bfd that is to be included on the link. We have a hook | |
1877 | to do reloc rummaging, before section sizes are nailed down. */ | |
1878 | ||
1879 | _bfd_coff_get_external_symbols (abfd); | |
1880 | ||
1881 | globals = coff_arm_hash_table (info); | |
1882 | ||
1883 | BFD_ASSERT (globals != NULL); | |
1884 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1885 | ||
1886 | globals->support_old_code = support_old_code; | |
1887 | ||
1888 | /* Rummage around all the relocs and map the glue vectors. */ | |
1889 | sec = abfd->sections; | |
1890 | ||
1891 | if (sec == NULL) | |
1892 | return true; | |
1893 | ||
1894 | for (; sec != NULL; sec = sec->next) | |
1895 | { | |
1896 | struct internal_reloc * i; | |
1897 | struct internal_reloc * rel; | |
1898 | ||
1899 | if (sec->reloc_count == 0) | |
1900 | continue; | |
1901 | ||
1902 | /* Load the relocs. */ | |
1903 | /* FIXME: there may be a storage leak here. */ | |
1904 | ||
1905 | i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0); | |
1906 | ||
1907 | BFD_ASSERT (i != 0); | |
1908 | ||
1909 | for (rel = i; rel < i + sec->reloc_count; ++rel) | |
1910 | { | |
1911 | unsigned short r_type = rel->r_type; | |
af74ae99 | 1912 | unsigned long symndx; |
252b5132 RH |
1913 | struct coff_link_hash_entry * h; |
1914 | ||
1915 | symndx = rel->r_symndx; | |
1916 | ||
1917 | /* If the relocation is not against a symbol it cannot concern us. */ | |
1918 | if (symndx == -1) | |
1919 | continue; | |
1920 | ||
af74ae99 NC |
1921 | if (symndx >= obj_conv_table_size (abfd)) |
1922 | { | |
1923 | _bfd_error_handler (_("%s: illegal symbol index in reloc: %d"), | |
1924 | bfd_get_filename (abfd), symndx); | |
1925 | continue; | |
1926 | } | |
1927 | ||
252b5132 RH |
1928 | h = obj_coff_sym_hashes (abfd)[symndx]; |
1929 | ||
1930 | /* If the relocation is against a static symbol it must be within | |
1931 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
1932 | if (h == NULL) | |
1933 | continue; | |
1934 | ||
1935 | switch (r_type) | |
1936 | { | |
1937 | case ARM_26: | |
1938 | /* This one is a call from arm code. We need to look up | |
1939 | the target of the call. If it is a thumb target, we | |
1940 | insert glue. */ | |
1941 | ||
1942 | if (h->class == C_THUMBEXTFUNC) | |
1943 | record_arm_to_thumb_glue (info, h); | |
1944 | break; | |
1945 | ||
1946 | case ARM_THUMB23: | |
1947 | /* This one is a call from thumb code. We used to look | |
1948 | for ARM_THUMB9 and ARM_THUMB12 as well. We need to look | |
1949 | up the target of the call. If it is an arm target, we | |
1950 | insert glue. If the symbol does not exist it will be | |
1951 | given a class of C_EXT and so we will generate a stub | |
1952 | for it. This is not really a problem, since the link | |
1953 | is doomed anyway. */ | |
1954 | ||
1955 | switch (h->class) | |
1956 | { | |
1957 | case C_EXT: | |
1958 | case C_STAT: | |
1959 | case C_LABEL: | |
1960 | record_thumb_to_arm_glue (info, h); | |
1961 | break; | |
1962 | default: | |
1963 | ; | |
1964 | } | |
1965 | break; | |
1966 | ||
1967 | default: | |
1968 | break; | |
1969 | } | |
1970 | } | |
1971 | } | |
1972 | ||
1973 | return true; | |
1974 | } | |
1975 | ||
e049a0de ILT |
1976 | #endif /* ! defined (COFF_IMAGE_WITH_PE) */ |
1977 | ||
252b5132 RH |
1978 | #define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup |
1979 | #define coff_relocate_section coff_arm_relocate_section | |
1980 | #define coff_bfd_is_local_label_name coff_arm_is_local_label_name | |
1981 | #define coff_adjust_symndx coff_arm_adjust_symndx | |
1982 | #define coff_link_output_has_begun coff_arm_link_output_has_begun | |
1983 | #define coff_final_link_postscript coff_arm_final_link_postscript | |
1984 | #define coff_bfd_merge_private_bfd_data coff_arm_merge_private_bfd_data | |
1985 | #define coff_bfd_print_private_bfd_data coff_arm_print_private_bfd_data | |
1986 | #define coff_bfd_set_private_flags _bfd_coff_arm_set_private_flags | |
1987 | #define coff_bfd_copy_private_bfd_data coff_arm_copy_private_bfd_data | |
1988 | #define coff_bfd_link_hash_table_create coff_arm_link_hash_table_create | |
1989 | ||
1990 | ||
1991 | /* When doing a relocateable link, we want to convert ARM26 relocs | |
1992 | into ARM26D relocs. */ | |
1993 | ||
1994 | static boolean | |
1995 | coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp) | |
5f771d47 ILT |
1996 | bfd *obfd ATTRIBUTE_UNUSED; |
1997 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
252b5132 RH |
1998 | bfd *ibfd; |
1999 | asection *sec; | |
2000 | struct internal_reloc *irel; | |
2001 | boolean *adjustedp; | |
2002 | { | |
2003 | if (irel->r_type == 3) | |
2004 | { | |
2005 | struct coff_link_hash_entry *h; | |
2006 | ||
2007 | h = obj_coff_sym_hashes (ibfd)[irel->r_symndx]; | |
2008 | if (h != NULL | |
2009 | && (h->root.type == bfd_link_hash_defined | |
2010 | || h->root.type == bfd_link_hash_defweak) | |
2011 | && h->root.u.def.section->output_section == sec->output_section) | |
2012 | irel->r_type = 7; | |
2013 | } | |
2014 | *adjustedp = false; | |
2015 | return true; | |
2016 | } | |
2017 | ||
2018 | /* Called when merging the private data areas of two BFDs. | |
2019 | This is important as it allows us to detect if we are | |
2020 | attempting to merge binaries compiled for different ARM | |
2021 | targets, eg different CPUs or differents APCS's. */ | |
2022 | ||
2023 | static boolean | |
2024 | coff_arm_merge_private_bfd_data (ibfd, obfd) | |
2025 | bfd * ibfd; | |
2026 | bfd * obfd; | |
2027 | { | |
2028 | BFD_ASSERT (ibfd != NULL && obfd != NULL); | |
2029 | ||
2030 | if (ibfd == obfd) | |
2031 | return true; | |
2032 | ||
2033 | /* If the two formats are different we cannot merge anything. | |
2034 | This is not an error, since it is permissable to change the | |
2035 | input and output formats. */ | |
2036 | if ( ibfd->xvec->flavour != bfd_target_coff_flavour | |
2037 | || obfd->xvec->flavour != bfd_target_coff_flavour) | |
2038 | return true; | |
2039 | ||
2040 | /* Verify that the APCS is the same for the two BFDs */ | |
2041 | if (APCS_SET (ibfd)) | |
2042 | { | |
2043 | if (APCS_SET (obfd)) | |
2044 | { | |
2045 | /* If the src and dest have different APCS flag bits set, fail. */ | |
2046 | if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd)) | |
2047 | { | |
2048 | _bfd_error_handler | |
2049 | /* xgettext: c-format */ | |
2050 | (_("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d"), | |
2051 | bfd_get_filename (ibfd), APCS_26_FLAG (ibfd) ? 26 : 32, | |
2052 | bfd_get_filename (obfd), APCS_26_FLAG (obfd) ? 26 : 32 | |
2053 | ); | |
2054 | ||
2055 | bfd_set_error (bfd_error_wrong_format); | |
2056 | return false; | |
2057 | } | |
2058 | ||
2059 | if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd)) | |
2060 | { | |
2061 | const char *msg; | |
2062 | ||
2063 | if (APCS_FLOAT_FLAG (ibfd)) | |
2064 | /* xgettext: c-format */ | |
2065 | msg = _("%s: ERROR: passes floats in float registers whereas target %s uses integer registers"); | |
2066 | else | |
2067 | /* xgettext: c-format */ | |
2068 | msg = _("%s: ERROR: passes floats in integer registers whereas target %s uses float registers"); | |
2069 | ||
2070 | _bfd_error_handler (msg, bfd_get_filename (ibfd), | |
2071 | bfd_get_filename (obfd)); | |
2072 | ||
2073 | bfd_set_error (bfd_error_wrong_format); | |
2074 | return false; | |
2075 | } | |
2076 | ||
2077 | if (PIC_FLAG (obfd) != PIC_FLAG (ibfd)) | |
2078 | { | |
2079 | const char * msg; | |
2080 | ||
2081 | if (PIC_FLAG (ibfd)) | |
2082 | /* xgettext: c-format */ | |
2083 | msg = _("%s: ERROR: compiled as position independent code, whereas target %s is absolute position"); | |
2084 | else | |
2085 | /* xgettext: c-format */ | |
2086 | msg = _("%s: ERROR: compiled as absolute position code, whereas target %s is position independent"); | |
2087 | _bfd_error_handler (msg, bfd_get_filename (ibfd), | |
2088 | bfd_get_filename (obfd)); | |
2089 | ||
2090 | bfd_set_error (bfd_error_wrong_format); | |
2091 | return false; | |
2092 | } | |
2093 | } | |
2094 | else | |
2095 | { | |
2096 | SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd)); | |
2097 | ||
2098 | /* Set up the arch and fields as well as these are probably wrong. */ | |
2099 | bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | /* Check the interworking support. */ | |
2104 | if (INTERWORK_SET (ibfd)) | |
2105 | { | |
2106 | if (INTERWORK_SET (obfd)) | |
2107 | { | |
2108 | /* If the src and dest differ in their interworking issue a warning. */ | |
2109 | if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd)) | |
2110 | { | |
2111 | const char * msg; | |
2112 | ||
2113 | if (INTERWORK_FLAG (ibfd)) | |
2114 | /* xgettext: c-format */ | |
2115 | msg = _("Warning: input file %s supports interworking, whereas %s does not."); | |
2116 | else | |
2117 | /* xgettext: c-format */ | |
2118 | msg = _("Warning: input file %s does not support interworking, whereas %s does."); | |
2119 | ||
2120 | _bfd_error_handler (msg, bfd_get_filename (ibfd), | |
2121 | bfd_get_filename (obfd)); | |
2122 | } | |
2123 | } | |
2124 | else | |
2125 | { | |
2126 | SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd)); | |
2127 | } | |
2128 | } | |
2129 | ||
2130 | return true; | |
2131 | } | |
2132 | ||
2133 | ||
2134 | /* Display the flags field. */ | |
2135 | ||
2136 | static boolean | |
2137 | coff_arm_print_private_bfd_data (abfd, ptr) | |
2138 | bfd * abfd; | |
2139 | PTR ptr; | |
2140 | { | |
2141 | FILE * file = (FILE *) ptr; | |
2142 | ||
2143 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
2144 | ||
2145 | /* xgettext:c-format */ | |
2146 | fprintf (file, _("private flags = %x:"), coff_data (abfd)->flags); | |
2147 | ||
2148 | if (APCS_SET (abfd)) | |
2149 | { | |
2150 | /* xgettext: APCS is ARM Prodecure Call Standard, it should not be translated. */ | |
2151 | fprintf (file, " [APCS-%d]", APCS_26_FLAG (abfd) ? 26 : 32); | |
2152 | ||
2153 | if (APCS_FLOAT_FLAG (abfd)) | |
2154 | fprintf (file, _(" [floats passed in float registers]")); | |
2155 | else | |
2156 | fprintf (file, _(" [floats passed in integer registers]")); | |
2157 | ||
2158 | if (PIC_FLAG (abfd)) | |
2159 | fprintf (file, _(" [position independent]")); | |
2160 | else | |
2161 | fprintf (file, _(" [absolute position]")); | |
2162 | } | |
2163 | ||
2164 | if (! INTERWORK_SET (abfd)) | |
2165 | fprintf (file, _(" [interworking flag not initialised]")); | |
2166 | else if (INTERWORK_FLAG (abfd)) | |
2167 | fprintf (file, _(" [interworking supported]")); | |
2168 | else | |
2169 | fprintf (file, _(" [interworking not supported]")); | |
2170 | ||
2171 | fputc ('\n', file); | |
2172 | ||
2173 | return true; | |
2174 | } | |
2175 | ||
2176 | ||
2177 | /* Copies the given flags into the coff_tdata.flags field. | |
2178 | Typically these flags come from the f_flags[] field of | |
2179 | the COFF filehdr structure, which contains important, | |
2180 | target specific information. | |
2181 | Note: Although this function is static, it is explicitly | |
2182 | called from both coffcode.h and peicode.h. */ | |
2183 | ||
2184 | static boolean | |
2185 | _bfd_coff_arm_set_private_flags (abfd, flags) | |
2186 | bfd * abfd; | |
2187 | flagword flags; | |
2188 | { | |
2189 | flagword flag; | |
2190 | ||
2191 | BFD_ASSERT (abfd != NULL); | |
2192 | ||
2193 | flag = (flags & F_APCS26) ? F_APCS_26 : 0; | |
2194 | ||
2195 | /* Make sure that the APCS field has not been initialised to the opposite | |
2196 | value. */ | |
2197 | if (APCS_SET (abfd) | |
2198 | && ( (APCS_26_FLAG (abfd) != flag) | |
2199 | || (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT)) | |
948221a8 | 2200 | || (PIC_FLAG (abfd) != (flags & F_PIC)) |
252b5132 RH |
2201 | )) |
2202 | return false; | |
2203 | ||
2204 | flag |= (flags & (F_APCS_FLOAT | F_PIC)); | |
2205 | ||
2206 | SET_APCS_FLAGS (abfd, flag); | |
2207 | ||
2208 | flag = (flags & F_INTERWORK); | |
2209 | ||
2210 | /* If the BFD has already had its interworking flag set, but it | |
2211 | is different from the value that we have been asked to set, | |
2212 | then assume that that merged code will not support interworking | |
2213 | and set the flag accordingly. */ | |
2214 | if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag)) | |
2215 | { | |
2216 | if (flag) | |
2217 | /* xgettext: c-format */ | |
2218 | _bfd_error_handler (_("Warning: Not setting interworking flag of %s, since it has already been specified as non-interworking"), | |
2219 | bfd_get_filename (abfd)); | |
2220 | else | |
2221 | /* xgettext: c-format */ | |
2222 | _bfd_error_handler (_("Warning: Clearing the interworking flag of %s due to outside request"), | |
2223 | bfd_get_filename (abfd)); | |
2224 | flag = 0; | |
2225 | } | |
2226 | ||
2227 | SET_INTERWORK_FLAG (abfd, flag); | |
2228 | ||
2229 | return true; | |
2230 | } | |
2231 | ||
2232 | ||
2233 | /* Copy the important parts of the target specific data | |
2234 | from one instance of a BFD to another. */ | |
2235 | ||
2236 | static boolean | |
2237 | coff_arm_copy_private_bfd_data (src, dest) | |
2238 | bfd * src; | |
2239 | bfd * dest; | |
2240 | { | |
2241 | BFD_ASSERT (src != NULL && dest != NULL); | |
2242 | ||
2243 | if (src == dest) | |
2244 | return true; | |
2245 | ||
2246 | /* If the destination is not in the same format as the source, do not do | |
2247 | the copy. */ | |
2248 | if (src->xvec != dest->xvec) | |
2249 | return true; | |
2250 | ||
2251 | /* copy the flags field */ | |
2252 | if (APCS_SET (src)) | |
2253 | { | |
2254 | if (APCS_SET (dest)) | |
2255 | { | |
2256 | /* If the src and dest have different APCS flag bits set, fail. */ | |
2257 | if (APCS_26_FLAG (dest) != APCS_26_FLAG (src)) | |
2258 | return false; | |
2259 | ||
2260 | if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src)) | |
2261 | return false; | |
2262 | ||
2263 | if (PIC_FLAG (dest) != PIC_FLAG (src)) | |
2264 | return false; | |
2265 | } | |
2266 | else | |
2267 | SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src) | |
2268 | | PIC_FLAG (src)); | |
2269 | } | |
2270 | ||
2271 | if (INTERWORK_SET (src)) | |
2272 | { | |
2273 | if (INTERWORK_SET (dest)) | |
2274 | { | |
2275 | /* If the src and dest have different interworking flags then turn | |
2276 | off the interworking bit. */ | |
2277 | if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src)) | |
2278 | { | |
2279 | if (INTERWORK_FLAG (dest)) | |
2280 | { | |
2281 | /* xgettext:c-format */ | |
2282 | _bfd_error_handler (("Warning: Clearing the interworking bit of %s, because the non-interworking code in %s has been copied into it"), | |
2283 | bfd_get_filename (dest), | |
2284 | bfd_get_filename (src)); | |
2285 | } | |
2286 | ||
2287 | SET_INTERWORK_FLAG (dest, 0); | |
2288 | } | |
2289 | } | |
2290 | else | |
2291 | { | |
2292 | SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src)); | |
2293 | } | |
2294 | } | |
2295 | ||
2296 | return true; | |
2297 | } | |
2298 | ||
2299 | /* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX | |
2300 | *must* match the definitions in gcc/config/arm/coff.h and semi.h */ | |
2301 | #define LOCAL_LABEL_PREFIX "." | |
2302 | #ifndef USER_LABEL_PREFIX | |
2303 | #define USER_LABEL_PREFIX "_" | |
2304 | #endif | |
2305 | ||
f8111282 NC |
2306 | /* Like _bfd_coff_is_local_label_name, but |
2307 | a) test against USER_LABEL_PREFIX, to avoid stripping labels known to be | |
2308 | non-local. | |
2309 | b) Allow other prefixes than ".", e.g. an empty prefix would cause all | |
2310 | labels of the form Lxxx to be stripped. */ | |
252b5132 RH |
2311 | static boolean |
2312 | coff_arm_is_local_label_name (abfd, name) | |
5f771d47 | 2313 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2314 | const char * name; |
2315 | { | |
252b5132 RH |
2316 | #ifdef USER_LABEL_PREFIX |
2317 | if (USER_LABEL_PREFIX[0] != 0) | |
2318 | { | |
2319 | if (strncmp (name, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)) == 0) | |
2320 | return false; | |
2321 | } | |
2322 | #endif | |
f8111282 NC |
2323 | |
2324 | #ifdef LOCAL_LABEL_PREFIX | |
2325 | /* If there is a prefix for local labels then look for this. | |
2326 | If the prefix exists, but it is empty, then ignore the test. */ | |
252b5132 | 2327 | |
f8111282 | 2328 | if (LOCAL_LABEL_PREFIX[0] != 0) |
252b5132 | 2329 | { |
f8111282 NC |
2330 | int len = strlen (LOCAL_LABEL_PREFIX); |
2331 | ||
2332 | if (strncmp (name, LOCAL_LABEL_PREFIX, len) != 0) | |
2333 | return false; | |
2334 | ||
2335 | /* Perform the checks below for the rest of the name. */ | |
2336 | name += len; | |
252b5132 | 2337 | } |
f8111282 NC |
2338 | #endif |
2339 | ||
2340 | return name[0] == 'L'; | |
252b5132 RH |
2341 | } |
2342 | ||
2343 | /* This piece of machinery exists only to guarantee that the bfd that holds | |
2344 | the glue section is written last. | |
2345 | ||
2346 | This does depend on bfd_make_section attaching a new section to the | |
2347 | end of the section list for the bfd. | |
2348 | ||
2349 | krk@cygnus.com */ | |
2350 | ||
2351 | static boolean | |
2352 | coff_arm_link_output_has_begun (sub, info) | |
2353 | bfd * sub; | |
2354 | struct coff_final_link_info * info; | |
2355 | { | |
2356 | return (sub->output_has_begun | |
2357 | || sub == coff_arm_hash_table (info->info)->bfd_of_glue_owner); | |
2358 | } | |
2359 | ||
2360 | static boolean | |
2361 | coff_arm_final_link_postscript (abfd, pfinfo) | |
5f771d47 | 2362 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2363 | struct coff_final_link_info * pfinfo; |
2364 | { | |
2365 | struct coff_arm_link_hash_table * globals; | |
2366 | ||
2367 | globals = coff_arm_hash_table (pfinfo->info); | |
2368 | ||
2369 | BFD_ASSERT (globals != NULL); | |
2370 | ||
2371 | if (globals->bfd_of_glue_owner != NULL) | |
2372 | { | |
2373 | if (! _bfd_coff_link_input_bfd (pfinfo, globals->bfd_of_glue_owner)) | |
2374 | return false; | |
2375 | ||
2376 | globals->bfd_of_glue_owner->output_has_begun = true; | |
2377 | } | |
2378 | ||
2379 | return true; | |
2380 | } | |
2381 | ||
2382 | #if 0 | |
2383 | #define coff_SWAP_sym_in arm_bfd_coff_swap_sym_in | |
2384 | ||
2385 | static void coff_swap_sym_in PARAMS ((bfd *, PTR, PTR)); | |
2386 | ||
2387 | /* Sepcial version of symbol swapper, used to grab a bfd | |
2388 | onto which the glue sections can be attached. */ | |
2389 | static void | |
2390 | arm_bfd_coff_swap_sym_in (abfd, ext1, in1) | |
2391 | bfd * abfd; | |
2392 | PTR ext1; | |
2393 | PTR in1; | |
2394 | { | |
2395 | flagword flags; | |
2396 | register asection * s; | |
2397 | ||
2398 | /* Do the normal swap in. */ | |
2399 | coff_swap_sym_in (abfd, ext1, in1); | |
2400 | ||
2401 | if (bfd_of_glue_owner != NULL) /* we already have a toc, so go home */ | |
2402 | return; | |
2403 | ||
2404 | /* Save the bfd for later allocation. */ | |
2405 | bfd_of_glue_owner = abfd; | |
2406 | ||
2407 | s = bfd_get_section_by_name (bfd_of_glue_owner , | |
2408 | ARM2THUMB_GLUE_SECTION_NAME); | |
2409 | ||
2410 | if (s == NULL) | |
2411 | { | |
2412 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ; | |
2413 | ||
2414 | s = bfd_make_section (bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
2415 | ||
2416 | if (s == NULL | |
2417 | || !bfd_set_section_flags (bfd_of_glue_owner, s, flags) | |
2418 | || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2)) | |
2419 | { | |
2420 | /* FIXME: set appropriate bfd error */ | |
2421 | abort(); | |
2422 | } | |
2423 | } | |
2424 | ||
2425 | s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
2426 | ||
2427 | if (s == NULL) | |
2428 | { | |
2429 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ; | |
2430 | ||
2431 | s = bfd_make_section (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
2432 | ||
2433 | if (s == NULL | |
2434 | || !bfd_set_section_flags (bfd_of_glue_owner, s, flags) | |
2435 | || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2)) | |
2436 | { | |
2437 | /* FIXME: set appropriate bfd error krk@cygnus.com */ | |
2438 | abort(); | |
2439 | } | |
2440 | } | |
2441 | ||
2442 | return; | |
2443 | } | |
2444 | #endif | |
2445 | ||
2446 | #include "coffcode.h" | |
2447 | ||
c3c89269 NC |
2448 | #ifndef TARGET_LITTLE_SYM |
2449 | #define TARGET_LITTLE_SYM armcoff_little_vec | |
252b5132 | 2450 | #endif |
c3c89269 NC |
2451 | #ifndef TARGET_LITTLE_NAME |
2452 | #define TARGET_LITTLE_NAME "coff-arm-little" | |
252b5132 | 2453 | #endif |
c3c89269 NC |
2454 | #ifndef TARGET_BIG_SYM |
2455 | #define TARGET_BIG_SYM armcoff_big_vec | |
252b5132 | 2456 | #endif |
c3c89269 NC |
2457 | #ifndef TARGET_BIG_NAME |
2458 | #define TARGET_BIG_NAME "coff-arm-big" | |
252b5132 | 2459 | #endif |
252b5132 | 2460 | |
c3c89269 NC |
2461 | #ifndef TARGET_UNDERSCORE |
2462 | #define TARGET_UNDERSCORE 0 | |
252b5132 | 2463 | #endif |
c3c89269 NC |
2464 | |
2465 | #ifdef COFF_WITH_PE | |
2466 | #define EXTRA_S_FLAGS (SEC_LINK_ONCE | SEC_LINK_DUPLICATES) | |
252b5132 | 2467 | #else |
c3c89269 | 2468 | #define EXTRA_S_FLAGS 0 |
252b5132 | 2469 | #endif |
252b5132 | 2470 | |
c3c89269 NC |
2471 | /* Forward declaration for use initialising alternative_target field. */ |
2472 | extern const bfd_target TARGET_BIG_SYM ; | |
252b5132 | 2473 | |
c3c89269 NC |
2474 | /* Target vectors. */ |
2475 | CREATE_LITTLE_COFF_TARGET_VEC (TARGET_LITTLE_SYM, TARGET_LITTLE_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_BIG_SYM) | |
2476 | CREATE_BIG_COFF_TARGET_VEC (TARGET_BIG_SYM, TARGET_BIG_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_LITTLE_SYM) | |
252b5132 | 2477 |