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