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[deliverable/binutils-gdb.git] / bfd / coff-arm.c
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252b5132 1/* BFD back-end for ARM COFF files.
7898deda 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
eea6121a 3 2000, 2001, 2002, 2003, 2004
252b5132
RH		 4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
6
d21356d8 7 This file is part of BFD, the Binary File Descriptor library.
252b5132 8
d21356d8
NC		 9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
252b5132 13
d21356d8
NC		 14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
252b5132 18
d21356d8
NC		 19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
252b5132
RH		 22
23#include "bfd.h"
24#include "sysdep.h"
25#include "libbfd.h"
26
27#include "coff/arm.h"
28
29#include "coff/internal.h"
30
31#ifdef COFF_WITH_PE
32#include "coff/pe.h"
33#endif
34
35#include "libcoff.h"
36
37/* Macros for manipulation the bits in the flags field of the coff data
38 structure. */
dc810e39
AM		 39#define APCS_26_FLAG(abfd) \
40 (coff_data (abfd)->flags & F_APCS_26)
41
42#define APCS_FLOAT_FLAG(abfd) \
43 (coff_data (abfd)->flags & F_APCS_FLOAT)
44
45#define PIC_FLAG(abfd) \
46 (coff_data (abfd)->flags & F_PIC)
47
48#define APCS_SET(abfd) \
49 (coff_data (abfd)->flags & F_APCS_SET)
50
51#define SET_APCS_FLAGS(abfd, flgs) \
52 do \
53 { \
54 coff_data (abfd)->flags &= ~(F_APCS_26 | F_APCS_FLOAT | F_PIC); \
55 coff_data (abfd)->flags |= (flgs) | F_APCS_SET; \
56 } \
57 while (0)
58
59#define INTERWORK_FLAG(abfd) \
60 (coff_data (abfd)->flags & F_INTERWORK)
61
62#define INTERWORK_SET(abfd) \
63 (coff_data (abfd)->flags & F_INTERWORK_SET)
64
65#define SET_INTERWORK_FLAG(abfd, flg) \
66 do \
67 { \
68 coff_data (abfd)->flags &= ~F_INTERWORK; \
69 coff_data (abfd)->flags |= (flg) | F_INTERWORK_SET; \
70 } \
71 while (0)
af74ae99
NC		 72
73#ifndef NUM_ELEM
74#define NUM_ELEM(a) ((sizeof (a)) / sizeof ((a)[0]))
75#endif
d70910e8 76
252b5132
RH		 77typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype;
78/* some typedefs for holding instructions */
79typedef unsigned long int insn32;
80typedef unsigned short int insn16;
81
252b5132 82 /* Forward declarations for stupid compilers. */
b34976b6 83static bfd_boolean coff_arm_relocate_section
252b5132
RH		 84 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
85 struct internal_reloc *, struct internal_syment *, asection **));
86static bfd_reloc_status_type aoutarm_fix_pcrel_26_done
87 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
88static bfd_reloc_status_type aoutarm_fix_pcrel_26
89 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
7831a775 90#ifndef ARM_WINCE
252b5132
RH		 91static bfd_reloc_status_type coff_thumb_pcrel_23
92 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
252b5132
RH		 93static bfd_reloc_status_type coff_thumb_pcrel_9
94 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
7831a775
NC		 95static insn32 insert_thumb_branch
96 PARAMS ((insn32, int));
97#endif
98static bfd_reloc_status_type coff_thumb_pcrel_12
99 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
252b5132
RH		 100static bfd_reloc_status_type coff_arm_reloc
101 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
b34976b6 102static bfd_boolean coff_arm_adjust_symndx
252b5132 103 PARAMS ((bfd *, struct bfd_link_info *, bfd *,
b34976b6 104 asection *, struct internal_reloc *, bfd_boolean *));
d70910e8 105static reloc_howto_type * coff_arm_rtype_to_howto
252b5132 106 PARAMS ((bfd *, asection *, struct internal_reloc *,
dc810e39
AM		 107 struct coff_link_hash_entry *, struct internal_syment *,
108 bfd_vma *));
252b5132
RH		 109static bfd_reloc_status_type coff_thumb_pcrel_common
110 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **,
111 thumb_pcrel_branchtype));
dc810e39 112static const struct reloc_howto_struct * coff_arm_reloc_type_lookup
252b5132
RH		 113 PARAMS ((bfd *, bfd_reloc_code_real_type));
114static struct bfd_link_hash_table * coff_arm_link_hash_table_create
115 PARAMS ((bfd *));
252b5132 116static struct coff_link_hash_entry * find_thumb_glue
dc810e39 117 PARAMS ((struct bfd_link_info *, const char *, bfd *));
252b5132 118static struct coff_link_hash_entry * find_arm_glue
dc810e39 119 PARAMS ((struct bfd_link_info *, const char *, bfd *));
e049a0de 120#ifndef COFF_IMAGE_WITH_PE
252b5132
RH		 121static void record_arm_to_thumb_glue
122 PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *));
7831a775 123#ifndef ARM_WINCE
252b5132
RH		 124static void record_thumb_to_arm_glue
125 PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *));
e049a0de 126#endif
7831a775 127#endif
b34976b6 128static bfd_boolean coff_arm_merge_private_bfd_data
252b5132 129 PARAMS ((bfd *, bfd *));
b34976b6 130static bfd_boolean coff_arm_print_private_bfd_data
252b5132 131 PARAMS ((bfd *, PTR));
b34976b6 132static bfd_boolean _bfd_coff_arm_set_private_flags
252b5132 133 PARAMS ((bfd *, flagword));
b34976b6 134static bfd_boolean coff_arm_copy_private_bfd_data
252b5132 135 PARAMS ((bfd *, bfd *));
b34976b6 136static bfd_boolean coff_arm_is_local_label_name
252b5132 137 PARAMS ((bfd *, const char *));
b34976b6 138static bfd_boolean coff_arm_link_output_has_begun
252b5132 139 PARAMS ((bfd *, struct coff_final_link_info *));
b34976b6 140static bfd_boolean coff_arm_final_link_postscript
252b5132 141 PARAMS ((bfd *, struct coff_final_link_info *));
917583ad
NC		 142static void arm_emit_base_file_entry
143 PARAMS ((struct bfd_link_info *, bfd *, asection *, bfd_vma));
252b5132
RH		 144
145/* The linker script knows the section names for placement.
146 The entry_names are used to do simple name mangling on the stubs.
147 Given a function name, and its type, the stub can be found. The
917583ad 148 name can be changed. The only requirement is the %s be present. */
d70910e8 149
252b5132
RH		 150#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
151#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
152
153#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
154#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
155
d70910e8 156/* Used by the assembler. */
917583ad 157
252b5132
RH		 158static bfd_reloc_status_type
159coff_arm_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,
160 error_message)
161 bfd *abfd;
162 arelent *reloc_entry;
5f771d47 163 asymbol *symbol ATTRIBUTE_UNUSED;
252b5132 164 PTR data;
5f771d47 165 asection *input_section ATTRIBUTE_UNUSED;
252b5132 166 bfd *output_bfd;
5f771d47 167 char **error_message ATTRIBUTE_UNUSED;
252b5132
RH		 168{
169 symvalue diff;
170 if (output_bfd == (bfd *) NULL)
171 return bfd_reloc_continue;
172
173 diff = reloc_entry->addend;
174
dc810e39
AM		 175#define DOIT(x) \
176 x = ((x & ~howto->dst_mask) \
177 | (((x & howto->src_mask) + diff) & howto->dst_mask))
252b5132
RH		 178
179 if (diff != 0)
180 {
181 reloc_howto_type *howto = reloc_entry->howto;
182 unsigned char *addr = (unsigned char *) data + reloc_entry->address;
183
184 switch (howto->size)
185 {
186 case 0:
187 {
188 char x = bfd_get_8 (abfd, addr);
189 DOIT (x);
190 bfd_put_8 (abfd, x, addr);
191 }
192 break;
193
194 case 1:
195 {
196 short x = bfd_get_16 (abfd, addr);
197 DOIT (x);
dc810e39 198 bfd_put_16 (abfd, (bfd_vma) x, addr);
252b5132
RH		 199 }
200 break;
201
202 case 2:
203 {
204 long x = bfd_get_32 (abfd, addr);
205 DOIT (x);
dc810e39 206 bfd_put_32 (abfd, (bfd_vma) x, addr);
252b5132
RH		 207 }
208 break;
209
210 default:
211 abort ();
212 }
213 }
214
215 /* Now let bfd_perform_relocation finish everything up. */
216 return bfd_reloc_continue;
217}
218
219/* If USER_LABEL_PREFIX is defined as "_" (see coff_arm_is_local_label_name()
220 in this file), then TARGET_UNDERSCORE should be defined, otherwise it
221 should not. */
222#ifndef TARGET_UNDERSCORE
223#define TARGET_UNDERSCORE '_'
224#endif
225
226#ifndef PCRELOFFSET
b34976b6 227#define PCRELOFFSET TRUE
252b5132
RH		 228#endif
229
230/* These most certainly belong somewhere else. Just had to get rid of
17505c5c 231 the manifest constants in the code. */
252b5132
RH		 232#define ARM_8 0
233#define ARM_16 1
234#define ARM_32 2
235#define ARM_26 3
236#define ARM_DISP8 4
237#define ARM_DISP16 5
238#define ARM_DISP32 6
239#define ARM_26D 7
240/* 8 is unused */
241#define ARM_NEG16 9
242#define ARM_NEG32 10
243#define ARM_RVA32 11
244#define ARM_THUMB9 12
245#define ARM_THUMB12 13
246#define ARM_THUMB23 14
247
17505c5c
NC		 248#ifdef ARM_WINCE
249#undef ARM_32
250#undef ARM_RVA32
251#undef ARM_26
252#undef ARM_THUMB12
253#undef ARM_26D
254
d3793eaa 255#define ARM_26D 0
17505c5c
NC		 256#define ARM_32 1
257#define ARM_RVA32 2
258#define ARM_26 3
259#define ARM_THUMB12 4
17505c5c
NC		 260#define ARM_SECTION 14
261#define ARM_SECREL 15
262#endif
263
d70910e8 264static reloc_howto_type aoutarm_std_reloc_howto[] =
917583ad 265 {
17505c5c 266#ifdef ARM_WINCE
d3793eaa
NC		 267 HOWTO (ARM_26D,
268 2,
269 2,
270 24,
44e88952 271 TRUE,
d3793eaa
NC		 272 0,
273 complain_overflow_dont,
274 aoutarm_fix_pcrel_26_done,
275 "ARM_26D",
276 FALSE,
277 0x00ffffff,
278 0x0,
44e88952 279 PCRELOFFSET),
917583ad
NC		 280 HOWTO (ARM_32,
281 0,
282 2,
283 32,
b34976b6 284 FALSE,
917583ad
NC		 285 0,
286 complain_overflow_bitfield,
287 coff_arm_reloc,
288 "ARM_32",
d3793eaa 289 FALSE,
917583ad
NC		 290 0xffffffff,
291 0xffffffff,
292 PCRELOFFSET),
293 HOWTO (ARM_RVA32,
294 0,
295 2,
296 32,
b34976b6 297 FALSE,
917583ad
NC		 298 0,
299 complain_overflow_bitfield,
300 coff_arm_reloc,
301 "ARM_RVA32",
d3793eaa 302 FALSE,
917583ad
NC		 303 0xffffffff,
304 0xffffffff,
305 PCRELOFFSET),
306 HOWTO (ARM_26,
307 2,
308 2,
309 24,
b34976b6 310 TRUE,
917583ad
NC		 311 0,
312 complain_overflow_signed,
313 aoutarm_fix_pcrel_26 ,
314 "ARM_26",
b34976b6 315 FALSE,
917583ad
NC		 316 0x00ffffff,
317 0x00ffffff,
318 PCRELOFFSET),
319 HOWTO (ARM_THUMB12,
320 1,
321 1,
322 11,
b34976b6 323 TRUE,
917583ad
NC		 324 0,
325 complain_overflow_signed,
326 coff_thumb_pcrel_12 ,
327 "ARM_THUMB12",
b34976b6 328 FALSE,
917583ad
NC		 329 0x000007ff,
330 0x000007ff,
331 PCRELOFFSET),
d3793eaa 332 EMPTY_HOWTO (-1),
917583ad
NC		 333 EMPTY_HOWTO (-1),
334 EMPTY_HOWTO (-1),
335 EMPTY_HOWTO (-1),
336 EMPTY_HOWTO (-1),
337 EMPTY_HOWTO (-1),
338 EMPTY_HOWTO (-1),
339 EMPTY_HOWTO (-1),
340 EMPTY_HOWTO (-1),
341 HOWTO (ARM_SECTION,
342 0,
343 1,
344 16,
b34976b6 345 FALSE,
917583ad
NC		 346 0,
347 complain_overflow_bitfield,
348 coff_arm_reloc,
d3793eaa
NC		 349 "ARM_SECTION",
350 FALSE,
917583ad
NC		 351 0x0000ffff,
352 0x0000ffff,
353 PCRELOFFSET),
354 HOWTO (ARM_SECREL,
355 0,
356 2,
357 32,
b34976b6 358 FALSE,
917583ad
NC		 359 0,
360 complain_overflow_bitfield,
361 coff_arm_reloc,
d3793eaa
NC		 362 "ARM_SECREL",
363 FALSE,
917583ad
NC		 364 0xffffffff,
365 0xffffffff,
366 PCRELOFFSET),
17505c5c 367#else /* not ARM_WINCE */
b34976b6 368 HOWTO (ARM_8, /* type */
917583ad
NC		 369 0, /* rightshift */
370 0, /* size */
371 8, /* bitsize */
b34976b6 372 FALSE, /* pc_relative */
917583ad
NC		 373 0, /* bitpos */
374 complain_overflow_bitfield, /* complain_on_overflow */
b34976b6 375 coff_arm_reloc, /* special_function */
917583ad 376 "ARM_8", /* name */
b34976b6 377 TRUE, /* partial_inplace */
917583ad
NC		 378 0x000000ff, /* src_mask */
379 0x000000ff, /* dst_mask */
380 PCRELOFFSET /* pcrel_offset */),
381 HOWTO (ARM_16,
382 0,
383 1,
384 16,
b34976b6 385 FALSE,
917583ad
NC		 386 0,
387 complain_overflow_bitfield,
388 coff_arm_reloc,
389 "ARM_16",
b34976b6 390 TRUE,
917583ad
NC		 391 0x0000ffff,
392 0x0000ffff,
393 PCRELOFFSET),
394 HOWTO (ARM_32,
395 0,
396 2,
397 32,
b34976b6 398 FALSE,
917583ad
NC		 399 0,
400 complain_overflow_bitfield,
401 coff_arm_reloc,
402 "ARM_32",
b34976b6 403 TRUE,
917583ad
NC		 404 0xffffffff,
405 0xffffffff,
406 PCRELOFFSET),
407 HOWTO (ARM_26,
408 2,
409 2,
410 24,
b34976b6 411 TRUE,
917583ad
NC		 412 0,
413 complain_overflow_signed,
414 aoutarm_fix_pcrel_26 ,
415 "ARM_26",
b34976b6 416 FALSE,
917583ad
NC		 417 0x00ffffff,
418 0x00ffffff,
419 PCRELOFFSET),
420 HOWTO (ARM_DISP8,
421 0,
422 0,
423 8,
b34976b6 424 TRUE,
917583ad
NC		 425 0,
426 complain_overflow_signed,
427 coff_arm_reloc,
428 "ARM_DISP8",
b34976b6 429 TRUE,
917583ad
NC		 430 0x000000ff,
431 0x000000ff,
b34976b6 432 TRUE),
917583ad
NC		 433 HOWTO (ARM_DISP16,
434 0,
435 1,
436 16,
b34976b6 437 TRUE,
917583ad
NC		 438 0,
439 complain_overflow_signed,
440 coff_arm_reloc,
441 "ARM_DISP16",
b34976b6 442 TRUE,
917583ad
NC		 443 0x0000ffff,
444 0x0000ffff,
b34976b6 445 TRUE),
917583ad
NC		 446 HOWTO (ARM_DISP32,
447 0,
448 2,
449 32,
b34976b6 450 TRUE,
917583ad
NC		 451 0,
452 complain_overflow_signed,
453 coff_arm_reloc,
454 "ARM_DISP32",
b34976b6 455 TRUE,
917583ad
NC		 456 0xffffffff,
457 0xffffffff,
b34976b6 458 TRUE),
917583ad
NC		 459 HOWTO (ARM_26D,
460 2,
461 2,
462 24,
b34976b6 463 FALSE,
917583ad
NC		 464 0,
465 complain_overflow_dont,
466 aoutarm_fix_pcrel_26_done,
467 "ARM_26D",
b34976b6 468 TRUE,
917583ad
NC		 469 0x00ffffff,
470 0x0,
b34976b6 471 FALSE),
917583ad
NC		 472 /* 8 is unused */
473 EMPTY_HOWTO (-1),
474 HOWTO (ARM_NEG16,
475 0,
476 -1,
477 16,
b34976b6 478 FALSE,
917583ad
NC		 479 0,
480 complain_overflow_bitfield,
481 coff_arm_reloc,
482 "ARM_NEG16",
b34976b6 483 TRUE,
917583ad
NC		 484 0x0000ffff,
485 0x0000ffff,
b34976b6 486 FALSE),
917583ad
NC		 487 HOWTO (ARM_NEG32,
488 0,
489 -2,
490 32,
b34976b6 491 FALSE,
917583ad
NC		 492 0,
493 complain_overflow_bitfield,
494 coff_arm_reloc,
495 "ARM_NEG32",
b34976b6 496 TRUE,
917583ad
NC		 497 0xffffffff,
498 0xffffffff,
b34976b6 499 FALSE),
917583ad
NC		 500 HOWTO (ARM_RVA32,
501 0,
502 2,
503 32,
b34976b6 504 FALSE,
917583ad
NC		 505 0,
506 complain_overflow_bitfield,
507 coff_arm_reloc,
508 "ARM_RVA32",
b34976b6 509 TRUE,
917583ad
NC		 510 0xffffffff,
511 0xffffffff,
512 PCRELOFFSET),
513 HOWTO (ARM_THUMB9,
514 1,
515 1,
516 8,
b34976b6 517 TRUE,
917583ad
NC		 518 0,
519 complain_overflow_signed,
520 coff_thumb_pcrel_9 ,
521 "ARM_THUMB9",
b34976b6 522 FALSE,
917583ad
NC		 523 0x000000ff,
524 0x000000ff,
525 PCRELOFFSET),
526 HOWTO (ARM_THUMB12,
527 1,
528 1,
529 11,
b34976b6 530 TRUE,
917583ad
NC		 531 0,
532 complain_overflow_signed,
533 coff_thumb_pcrel_12 ,
534 "ARM_THUMB12",
b34976b6 535 FALSE,
917583ad
NC		 536 0x000007ff,
537 0x000007ff,
538 PCRELOFFSET),
539 HOWTO (ARM_THUMB23,
540 1,
541 2,
542 22,
b34976b6 543 TRUE,
917583ad
NC		 544 0,
545 complain_overflow_signed,
546 coff_thumb_pcrel_23 ,
547 "ARM_THUMB23",
b34976b6 548 FALSE,
917583ad
NC		 549 0x07ff07ff,
550 0x07ff07ff,
551 PCRELOFFSET)
17505c5c 552#endif /* not ARM_WINCE */
917583ad 553 };
252b5132 554
af74ae99
NC		 555#define NUM_RELOCS NUM_ELEM (aoutarm_std_reloc_howto)
556
252b5132 557#ifdef COFF_WITH_PE
b34976b6
AM		 558static bfd_boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *));
559/* Return TRUE if this relocation should
d70910e8 560 appear in the output .reloc section. */
252b5132 561
b34976b6 562static bfd_boolean
252b5132 563in_reloc_p (abfd, howto)
5f771d47 564 bfd * abfd ATTRIBUTE_UNUSED;
252b5132
RH		 565 reloc_howto_type * howto;
566{
567 return !howto->pc_relative && howto->type != ARM_RVA32;
d70910e8 568}
252b5132
RH		 569#endif
570
af74ae99
NC		 571#define RTYPE2HOWTO(cache_ptr, dst) \
572 (cache_ptr)->howto = \
573 (dst)->r_type < NUM_RELOCS \
574 ? aoutarm_std_reloc_howto + (dst)->r_type \
575 : NULL
252b5132
RH		 576
577#define coff_rtype_to_howto coff_arm_rtype_to_howto
578
579static reloc_howto_type *
580coff_arm_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
5f771d47 581 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 582 asection *sec;
583 struct internal_reloc *rel;
5f771d47
ILT		 584 struct coff_link_hash_entry *h ATTRIBUTE_UNUSED;
585 struct internal_syment *sym ATTRIBUTE_UNUSED;
252b5132
RH		 586 bfd_vma *addendp;
587{
af74ae99 588 reloc_howto_type * howto;
252b5132 589
af74ae99
NC		 590 if (rel->r_type >= NUM_RELOCS)
591 return NULL;
d70910e8 592
252b5132
RH		 593 howto = aoutarm_std_reloc_howto + rel->r_type;
594
595 if (rel->r_type == ARM_RVA32)
17505c5c 596 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
252b5132
RH		 597
598 return howto;
252b5132 599}
917583ad 600
d70910e8 601/* Used by the assembler. */
252b5132
RH		 602
603static bfd_reloc_status_type
604aoutarm_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section,
605 output_bfd, error_message)
5f771d47
ILT		 606 bfd *abfd ATTRIBUTE_UNUSED;
607 arelent *reloc_entry ATTRIBUTE_UNUSED;
608 asymbol *symbol ATTRIBUTE_UNUSED;
609 PTR data ATTRIBUTE_UNUSED;
610 asection *input_section ATTRIBUTE_UNUSED;
611 bfd *output_bfd ATTRIBUTE_UNUSED;
612 char **error_message ATTRIBUTE_UNUSED;
252b5132
RH		 613{
614 /* This is dead simple at present. */
615 return bfd_reloc_ok;
616}
617
d70910e8 618/* Used by the assembler. */
252b5132
RH		 619
620static bfd_reloc_status_type
621aoutarm_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section,
622 output_bfd, error_message)
623 bfd *abfd;
624 arelent *reloc_entry;
625 asymbol *symbol;
626 PTR data;
627 asection *input_section;
628 bfd *output_bfd;
5f771d47 629 char **error_message ATTRIBUTE_UNUSED;
252b5132
RH		 630{
631 bfd_vma relocation;
632 bfd_size_type addr = reloc_entry->address;
633 long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
634 bfd_reloc_status_type flag = bfd_reloc_ok;
d70910e8 635
917583ad 636 /* If this is an undefined symbol, return error. */
252b5132
RH		 637 if (symbol->section == &bfd_und_section
638 && (symbol->flags & BSF_WEAK) == 0)
639 return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
640
641 /* If the sections are different, and we are doing a partial relocation,
642 just ignore it for now. */
643 if (symbol->section->name != input_section->name
644 && output_bfd != (bfd *)NULL)
645 return bfd_reloc_continue;
646
647 relocation = (target & 0x00ffffff) << 2;
917583ad 648 relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend. */
252b5132
RH		 649 relocation += symbol->value;
650 relocation += symbol->section->output_section->vma;
651 relocation += symbol->section->output_offset;
652 relocation += reloc_entry->addend;
653 relocation -= input_section->output_section->vma;
654 relocation -= input_section->output_offset;
655 relocation -= addr;
d70910e8 656
252b5132
RH		 657 if (relocation & 3)
658 return bfd_reloc_overflow;
659
917583ad 660 /* Check for overflow. */
252b5132
RH		 661 if (relocation & 0x02000000)
662 {
663 if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff)
664 flag = bfd_reloc_overflow;
665 }
dc810e39 666 else if (relocation & ~(bfd_vma) 0x03ffffff)
252b5132
RH		 667 flag = bfd_reloc_overflow;
668
669 target &= ~0x00ffffff;
670 target |= (relocation >> 2) & 0x00ffffff;
dc810e39 671 bfd_put_32 (abfd, (bfd_vma) target, (bfd_byte *) data + addr);
252b5132
RH		 672
673 /* Now the ARM magic... Change the reloc type so that it is marked as done.
674 Strictly this is only necessary if we are doing a partial relocation. */
675 reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D];
676
677 return flag;
678}
679
680static bfd_reloc_status_type
681coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, input_section,
682 output_bfd, error_message, btype)
683 bfd *abfd;
684 arelent *reloc_entry;
685 asymbol *symbol;
686 PTR data;
687 asection *input_section;
688 bfd *output_bfd;
5f771d47 689 char **error_message ATTRIBUTE_UNUSED;
252b5132
RH		 690 thumb_pcrel_branchtype btype;
691{
692 bfd_vma relocation = 0;
693 bfd_size_type addr = reloc_entry->address;
694 long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
695 bfd_reloc_status_type flag = bfd_reloc_ok;
696 bfd_vma dstmsk;
697 bfd_vma offmsk;
698 bfd_vma signbit;
699
700 /* NOTE: This routine is currently used by GAS, but not by the link
701 phase. */
702
703 switch (btype)
704 {
705 case b9:
706 dstmsk = 0x000000ff;
707 offmsk = 0x000001fe;
708 signbit = 0x00000100;
709 break;
710
711 case b12:
712 dstmsk = 0x000007ff;
713 offmsk = 0x00000ffe;
714 signbit = 0x00000800;
715 break;
716
717 case b23:
718 dstmsk = 0x07ff07ff;
719 offmsk = 0x007fffff;
720 signbit = 0x00400000;
721 break;
722
723 default:
724 abort ();
725 }
d70910e8 726
917583ad 727 /* If this is an undefined symbol, return error. */
252b5132
RH		 728 if (symbol->section == &bfd_und_section
729 && (symbol->flags & BSF_WEAK) == 0)
730 return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
731
732 /* If the sections are different, and we are doing a partial relocation,
733 just ignore it for now. */
734 if (symbol->section->name != input_section->name
735 && output_bfd != (bfd *)NULL)
736 return bfd_reloc_continue;
737
738 switch (btype)
739 {
740 case b9:
741 case b12:
742 relocation = ((target & dstmsk) << 1);
743 break;
744
745 case b23:
746 if (bfd_big_endian (abfd))
747 relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4);
748 else
749 relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15);
750 break;
751
752 default:
753 abort ();
754 }
755
917583ad 756 relocation = (relocation ^ signbit) - signbit; /* Sign extend. */
252b5132
RH		 757 relocation += symbol->value;
758 relocation += symbol->section->output_section->vma;
759 relocation += symbol->section->output_offset;
760 relocation += reloc_entry->addend;
761 relocation -= input_section->output_section->vma;
762 relocation -= input_section->output_offset;
763 relocation -= addr;
764
765 if (relocation & 1)
766 return bfd_reloc_overflow;
767
917583ad 768 /* Check for overflow. */
252b5132
RH		 769 if (relocation & signbit)
770 {
771 if ((relocation & ~offmsk) != ~offmsk)
772 flag = bfd_reloc_overflow;
773 }
774 else if (relocation & ~offmsk)
775 flag = bfd_reloc_overflow;
776
777 target &= ~dstmsk;
778 switch (btype)
779 {
780 case b9:
781 case b12:
782 target |= (relocation >> 1);
783 break;
784
785 case b23:
786 if (bfd_big_endian (abfd))
dc810e39
AM		 787 target |= (((relocation & 0xfff) >> 1)
788 | ((relocation << 4) & 0x07ff0000));
252b5132 789 else
dc810e39
AM		 790 target |= (((relocation & 0xffe) << 15)
791 | ((relocation >> 12) & 0x7ff));
252b5132
RH		 792 break;
793
794 default:
795 abort ();
796 }
797
dc810e39 798 bfd_put_32 (abfd, (bfd_vma) target, (bfd_byte *) data + addr);
252b5132
RH		 799
800 /* Now the ARM magic... Change the reloc type so that it is marked as done.
801 Strictly this is only necessary if we are doing a partial relocation. */
802 reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D];
d70910e8 803
917583ad 804 /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations. */
252b5132
RH		 805 return flag;
806}
807
7831a775 808#ifndef ARM_WINCE
252b5132
RH		 809static bfd_reloc_status_type
810coff_thumb_pcrel_23 (abfd, reloc_entry, symbol, data, input_section,
811 output_bfd, error_message)
812 bfd *abfd;
813 arelent *reloc_entry;
814 asymbol *symbol;
815 PTR data;
816 asection *input_section;
817 bfd *output_bfd;
818 char **error_message;
819{
820 return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
dc810e39
AM		 821 input_section, output_bfd, error_message,
822 b23);
252b5132
RH		 823}
824
825static bfd_reloc_status_type
7831a775 826coff_thumb_pcrel_9 (abfd, reloc_entry, symbol, data, input_section,
252b5132
RH		 827 output_bfd, error_message)
828 bfd *abfd;
829 arelent *reloc_entry;
830 asymbol *symbol;
831 PTR data;
832 asection *input_section;
833 bfd *output_bfd;
834 char **error_message;
835{
836 return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
dc810e39 837 input_section, output_bfd, error_message,
7831a775 838 b9);
252b5132 839}
7831a775 840#endif /* not ARM_WINCE */
252b5132
RH		 841
842static bfd_reloc_status_type
7831a775 843coff_thumb_pcrel_12 (abfd, reloc_entry, symbol, data, input_section,
252b5132
RH		 844 output_bfd, error_message)
845 bfd *abfd;
846 arelent *reloc_entry;
847 asymbol *symbol;
848 PTR data;
849 asection *input_section;
850 bfd *output_bfd;
851 char **error_message;
852{
853 return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
dc810e39 854 input_section, output_bfd, error_message,
7831a775 855 b12);
252b5132
RH		 856}
857
dc810e39 858static const struct reloc_howto_struct *
252b5132
RH		 859coff_arm_reloc_type_lookup (abfd, code)
860 bfd * abfd;
861 bfd_reloc_code_real_type code;
862{
af74ae99 863#define ASTD(i,j) case i: return aoutarm_std_reloc_howto + j
d70910e8 864
252b5132
RH		 865 if (code == BFD_RELOC_CTOR)
866 switch (bfd_get_arch_info (abfd)->bits_per_address)
867 {
868 case 32:
869 code = BFD_RELOC_32;
870 break;
917583ad 871 default:
dc810e39 872 return (const struct reloc_howto_struct *) 0;
252b5132
RH		 873 }
874
875 switch (code)
876 {
17505c5c
NC		 877#ifdef ARM_WINCE
878 ASTD (BFD_RELOC_32, ARM_32);
879 ASTD (BFD_RELOC_RVA, ARM_RVA32);
880 ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26);
881 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12);
882#else
252b5132
RH		 883 ASTD (BFD_RELOC_8, ARM_8);
884 ASTD (BFD_RELOC_16, ARM_16);
885 ASTD (BFD_RELOC_32, ARM_32);
886 ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26);
077b8428 887 ASTD (BFD_RELOC_ARM_PCREL_BLX, ARM_26);
252b5132
RH		 888 ASTD (BFD_RELOC_8_PCREL, ARM_DISP8);
889 ASTD (BFD_RELOC_16_PCREL, ARM_DISP16);
890 ASTD (BFD_RELOC_32_PCREL, ARM_DISP32);
891 ASTD (BFD_RELOC_RVA, ARM_RVA32);
892 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9);
893 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12);
894 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23);
f8f3c6cc 895 ASTD (BFD_RELOC_THUMB_PCREL_BLX, ARM_THUMB23);
d70910e8 896#endif
dc810e39 897 default: return (const struct reloc_howto_struct *) 0;
252b5132
RH		 898 }
899}
900
901#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
902#define COFF_PAGE_SIZE 0x1000
903/* Turn a howto into a reloc nunmber */
904
905#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
906#define BADMAG(x) ARMBADMAG(x)
907#define ARM 1 /* Customize coffcode.h */
908
7831a775 909#ifndef ARM_WINCE
2106126f 910/* Make sure that the 'r_offset' field is copied properly
830629ab 911 so that identical binaries will compare the same. */
2106126f
NC		 912#define SWAP_IN_RELOC_OFFSET H_GET_32
913#define SWAP_OUT_RELOC_OFFSET H_PUT_32
7831a775 914#endif
2106126f 915
252b5132
RH		 916/* Extend the coff_link_hash_table structure with a few ARM specific fields.
917 This allows us to store global data here without actually creating any
918 global variables, which is a no-no in the BFD world. */
919struct coff_arm_link_hash_table
917583ad
NC		 920 {
921 /* The original coff_link_hash_table structure. MUST be first field. */
922 struct coff_link_hash_table root;
d70910e8 923
5c4491d3 924 /* The size in bytes of the section containing the Thumb-to-ARM glue. */
dc810e39 925 bfd_size_type thumb_glue_size;
d70910e8 926
5c4491d3 927 /* The size in bytes of the section containing the ARM-to-Thumb glue. */
dc810e39 928 bfd_size_type arm_glue_size;
252b5132 929
5c4491d3 930 /* An arbitrary input BFD chosen to hold the glue sections. */
917583ad 931 bfd * bfd_of_glue_owner;
252b5132 932
917583ad
NC		 933 /* Support interworking with old, non-interworking aware ARM code. */
934 int support_old_code;
252b5132
RH		 935};
936
937/* Get the ARM coff linker hash table from a link_info structure. */
938#define coff_arm_hash_table(info) \
939 ((struct coff_arm_link_hash_table *) ((info)->hash))
940
941/* Create an ARM coff linker hash table. */
942
943static struct bfd_link_hash_table *
944coff_arm_link_hash_table_create (abfd)
945 bfd * abfd;
946{
947 struct coff_arm_link_hash_table * ret;
dc810e39 948 bfd_size_type amt = sizeof (struct coff_arm_link_hash_table);
252b5132 949
e2d34d7d 950 ret = (struct coff_arm_link_hash_table *) bfd_malloc (amt);
252b5132
RH		 951 if (ret == (struct coff_arm_link_hash_table *) NULL)
952 return NULL;
953
954 if (! _bfd_coff_link_hash_table_init
955 (& ret->root, abfd, _bfd_coff_link_hash_newfunc))
956 {
e2d34d7d 957 free (ret);
252b5132
RH		 958 return (struct bfd_link_hash_table *) NULL;
959 }
960
961 ret->thumb_glue_size = 0;
962 ret->arm_glue_size = 0;
963 ret->bfd_of_glue_owner = NULL;
964
965 return & ret->root.root;
966}
967
271025eb 968static void
252b5132
RH		 969arm_emit_base_file_entry (info, output_bfd, input_section, reloc_offset)
970 struct bfd_link_info *info;
971 bfd *output_bfd;
972 asection *input_section;
973 bfd_vma reloc_offset;
974{
975 bfd_vma addr = reloc_offset
976 - input_section->vma
977 + input_section->output_offset
978 + input_section->output_section->vma;
979
917583ad
NC		 980 if (coff_data (output_bfd)->pe)
981 addr -= pe_data (output_bfd)->pe_opthdr.ImageBase;
982 fwrite (& addr, 1, sizeof (addr), (FILE *) info->base_file);
252b5132
RH		 983
984}
985\f
7831a775 986#ifndef ARM_WINCE
252b5132
RH		 987/* The thumb form of a long branch is a bit finicky, because the offset
988 encoding is split over two fields, each in it's own instruction. They
d70910e8 989 can occur in any order. So given a thumb form of long branch, and an
252b5132 990 offset, insert the offset into the thumb branch and return finished
d70910e8 991 instruction.
252b5132 992
d70910e8 993 It takes two thumb instructions to encode the target address. Each has
5c4491d3 994 11 bits to invest. The upper 11 bits are stored in one (identified by
d70910e8
KH		 995 H-0.. see below), the lower 11 bits are stored in the other (identified
996 by H-1).
252b5132 997
d70910e8 998 Combine together and shifted left by 1 (it's a half word address) and
252b5132
RH		 999 there you have it.
1000
1001 Op: 1111 = F,
1002 H-0, upper address-0 = 000
1003 Op: 1111 = F,
1004 H-1, lower address-0 = 800
1005
d70910e8 1006 They can be ordered either way, but the arm tools I've seen always put
252b5132
RH		 1007 the lower one first. It probably doesn't matter. krk@cygnus.com
1008
1009 XXX: Actually the order does matter. The second instruction (H-1)
1010 moves the computed address into the PC, so it must be the second one
1011 in the sequence. The problem, however is that whilst little endian code
1012 stores the instructions in HI then LOW order, big endian code does the
917583ad 1013 reverse. nickc@cygnus.com. */
252b5132
RH		 1014
1015#define LOW_HI_ORDER 0xF800F000
1016#define HI_LOW_ORDER 0xF000F800
1017
1018static insn32
1019insert_thumb_branch (br_insn, rel_off)
1020 insn32 br_insn;
1021 int rel_off;
1022{
1023 unsigned int low_bits;
1024 unsigned int high_bits;
1025
252b5132
RH		 1026 BFD_ASSERT((rel_off & 1) != 1);
1027
1028 rel_off >>= 1; /* half word aligned address */
1029 low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */
1030 high_bits = (rel_off >> 11) & 0x000007FF; /* the top 11 bits */
1031
1032 if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
1033 br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
1034 else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
1035 br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
1036 else
dc810e39
AM		 1037 /* FIXME: the BFD library should never abort except for internal errors
1038 - it should return an error status. */
917583ad 1039 abort (); /* Error - not a valid branch instruction form. */
252b5132
RH		 1040
1041 return br_insn;
1042}
7831a775 1043
252b5132
RH		 1044\f
1045static struct coff_link_hash_entry *
1046find_thumb_glue (info, name, input_bfd)
dc810e39
AM		 1047 struct bfd_link_info *info;
1048 const char *name;
1049 bfd *input_bfd;
252b5132 1050{
dc810e39
AM		 1051 char *tmp_name;
1052 struct coff_link_hash_entry *myh;
1053 bfd_size_type amt = strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1;
252b5132 1054
dc810e39 1055 tmp_name = (char *) bfd_malloc (amt);
252b5132
RH		 1056
1057 BFD_ASSERT (tmp_name);
1058
1059 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
d70910e8 1060
252b5132 1061 myh = coff_link_hash_lookup
b34976b6 1062 (coff_hash_table (info), tmp_name, FALSE, FALSE, TRUE);
d70910e8 1063
252b5132
RH		 1064 if (myh == NULL)
1065 /* xgettext:c-format */
1066 _bfd_error_handler (_("%s: unable to find THUMB glue '%s' for `%s'"),
8f615d07 1067 bfd_archive_filename (input_bfd), tmp_name, name);
d70910e8 1068
252b5132
RH		 1069 free (tmp_name);
1070
1071 return myh;
1072}
7831a775 1073#endif /* not ARM_WINCE */
252b5132
RH		 1074
1075static struct coff_link_hash_entry *
1076find_arm_glue (info, name, input_bfd)
dc810e39
AM		 1077 struct bfd_link_info *info;
1078 const char *name;
1079 bfd *input_bfd;
252b5132 1080{
dc810e39 1081 char *tmp_name;
252b5132 1082 struct coff_link_hash_entry * myh;
dc810e39 1083 bfd_size_type amt = strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1;
252b5132 1084
dc810e39 1085 tmp_name = (char *) bfd_malloc (amt);
252b5132
RH		 1086
1087 BFD_ASSERT (tmp_name);
1088
1089 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
d70910e8 1090
252b5132 1091 myh = coff_link_hash_lookup
b34976b6 1092 (coff_hash_table (info), tmp_name, FALSE, FALSE, TRUE);
252b5132
RH		 1093
1094 if (myh == NULL)
1095 /* xgettext:c-format */
1096 _bfd_error_handler (_("%s: unable to find ARM glue '%s' for `%s'"),
8f615d07 1097 bfd_archive_filename (input_bfd), tmp_name, name);
d70910e8 1098
252b5132
RH		 1099 free (tmp_name);
1100
1101 return myh;
1102}
1103
1104/*
1105 ARM->Thumb glue:
1106
1107 .arm
1108 __func_from_arm:
1109 ldr r12, __func_addr
1110 bx r12
1111 __func_addr:
1112 .word func @ behave as if you saw a ARM_32 reloc
1113*/
1114
1115#define ARM2THUMB_GLUE_SIZE 12
1116static const insn32 a2t1_ldr_insn = 0xe59fc000;
1117static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
1118static const insn32 a2t3_func_addr_insn = 0x00000001;
1119
252b5132
RH		 1120/*
1121 Thumb->ARM: Thumb->(non-interworking aware) ARM
1122
1123 .thumb .thumb
1124 .align 2 .align 2
1125 __func_from_thumb: __func_from_thumb:
1126 bx pc push {r6, lr}
1127 nop ldr r6, __func_addr
1128 .arm mov lr, pc
1129 __func_change_to_arm: bx r6
1130 b func .arm
1131 __func_back_to_thumb:
1132 ldmia r13! {r6, lr}
1133 bx lr
1134 __func_addr:
d70910e8 1135 .word func
252b5132
RH		 1136*/
1137
1138#define THUMB2ARM_GLUE_SIZE (globals->support_old_code ? 20 : 8)
1139static const insn16 t2a1_bx_pc_insn = 0x4778;
1140static const insn16 t2a2_noop_insn = 0x46c0;
1141static const insn32 t2a3_b_insn = 0xea000000;
1142
252b5132
RH		 1143static const insn16 t2a1_push_insn = 0xb540;
1144static const insn16 t2a2_ldr_insn = 0x4e03;
1145static const insn16 t2a3_mov_insn = 0x46fe;
1146static const insn16 t2a4_bx_insn = 0x4730;
1147static const insn32 t2a5_pop_insn = 0xe8bd4040;
1148static const insn32 t2a6_bx_insn = 0xe12fff1e;
1149
1150/* TODO:
1151 We should really create new local (static) symbols in destination
1152 object for each stub we create. We should also create local
1153 (static) symbols within the stubs when switching between ARM and
1154 Thumb code. This will ensure that the debugger and disassembler
1155 can present a better view of stubs.
1156
1157 We can treat stubs like literal sections, and for the THUMB9 ones
1158 (short addressing range) we should be able to insert the stubs
1159 between sections. i.e. the simplest approach (since relocations
1160 are done on a section basis) is to dump the stubs at the end of
1161 processing a section. That way we can always try and minimise the
1162 offset to and from a stub. However, this does not map well onto
1163 the way that the linker/BFD does its work: mapping all input
1164 sections to output sections via the linker script before doing
1165 all the processing.
1166
1167 Unfortunately it may be easier to just to disallow short range
1168 Thumb->ARM stubs (i.e. no conditional inter-working branches,
1169 only branch-and-link (BL) calls. This will simplify the processing
1170 since we can then put all of the stubs into their own section.
1171
1172 TODO:
1173 On a different subject, rather than complaining when a
1174 branch cannot fit in the number of bits available for the
1175 instruction we should generate a trampoline stub (needed to
1176 address the complete 32bit address space). */
1177
d70910e8 1178/* The standard COFF backend linker does not cope with the special
252b5132
RH		 1179 Thumb BRANCH23 relocation. The alternative would be to split the
1180 BRANCH23 into seperate HI23 and LO23 relocations. However, it is a
d70910e8 1181 bit simpler simply providing our own relocation driver. */
252b5132
RH		 1182
1183/* The reloc processing routine for the ARM/Thumb COFF linker. NOTE:
1184 This code is a very slightly modified copy of
1185 _bfd_coff_generic_relocate_section. It would be a much more
1186 maintainable solution to have a MACRO that could be expanded within
1187 _bfd_coff_generic_relocate_section that would only be provided for
1188 ARM/Thumb builds. It is only the code marked THUMBEXTENSION that
1189 is different from the original. */
1190
b34976b6 1191static bfd_boolean
252b5132
RH		 1192coff_arm_relocate_section (output_bfd, info, input_bfd, input_section,
1193 contents, relocs, syms, sections)
1194 bfd *output_bfd;
1195 struct bfd_link_info *info;
1196 bfd *input_bfd;
1197 asection *input_section;
1198 bfd_byte *contents;
1199 struct internal_reloc *relocs;
1200 struct internal_syment *syms;
1201 asection **sections;
1202{
1203 struct internal_reloc * rel;
1204 struct internal_reloc * relend;
07515404 1205 bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section);
252b5132
RH		 1206
1207 rel = relocs;
1208 relend = rel + input_section->reloc_count;
1209
1210 for (; rel < relend; rel++)
1211 {
1212 int done = 0;
1213 long symndx;
1214 struct coff_link_hash_entry * h;
1215 struct internal_syment * sym;
1216 bfd_vma addend;
1217 bfd_vma val;
1218 reloc_howto_type * howto;
1219 bfd_reloc_status_type rstat;
1220 bfd_vma h_val;
1221
1222 symndx = rel->r_symndx;
1223
1224 if (symndx == -1)
1225 {
1226 h = NULL;
1227 sym = NULL;
1228 }
1229 else
d70910e8 1230 {
252b5132
RH		 1231 h = obj_coff_sym_hashes (input_bfd)[symndx];
1232 sym = syms + symndx;
1233 }
1234
1235 /* COFF treats common symbols in one of two ways. Either the
1236 size of the symbol is included in the section contents, or it
1237 is not. We assume that the size is not included, and force
1238 the rtype_to_howto function to adjust the addend as needed. */
1239
1240 if (sym != NULL && sym->n_scnum != 0)
1241 addend = - sym->n_value;
1242 else
1243 addend = 0;
1244
252b5132
RH		 1245 howto = coff_rtype_to_howto (input_bfd, input_section, rel, h,
1246 sym, &addend);
1247 if (howto == NULL)
b34976b6 1248 return FALSE;
252b5132
RH		 1249
1250 /* The relocation_section function will skip pcrel_offset relocs
1049f94e 1251 when doing a relocatable link. However, we want to convert
d21356d8 1252 ARM_26 to ARM_26D relocs if possible. We return a fake howto in
252b5132 1253 this case without pcrel_offset set, and adjust the addend to
44e88952
NC		 1254 compensate. 'partial_inplace' is also set, since we want 'done'
1255 relocations to be reflected in section's data. */
252b5132
RH		 1256 if (rel->r_type == ARM_26
1257 && h != NULL
1049f94e 1258 && info->relocatable
252b5132
RH		 1259 && (h->root.type == bfd_link_hash_defined
1260 || h->root.type == bfd_link_hash_defweak)
dc810e39
AM		 1261 && (h->root.u.def.section->output_section
1262 == input_section->output_section))
252b5132 1263 {
d70910e8 1264 static reloc_howto_type fake_arm26_reloc =
252b5132
RH		 1265 HOWTO (ARM_26,
1266 2,
1267 2,
1268 24,
b34976b6 1269 TRUE,
252b5132
RH		 1270 0,
1271 complain_overflow_signed,
1272 aoutarm_fix_pcrel_26 ,
1273 "ARM_26",
44e88952 1274 TRUE,
252b5132 1275 0x00ffffff,
d70910e8 1276 0x00ffffff,
b34976b6 1277 FALSE);
252b5132
RH		 1278
1279 addend -= rel->r_vaddr - input_section->vma;
44e88952
NC		 1280#ifdef ARM_WINCE
1281 /* FIXME: I don't know why, but the hack is necessary for correct
1282 generation of bl's instruction offset. */
1283 addend -= 8;
1284#endif
252b5132
RH		 1285 howto = &fake_arm26_reloc;
1286 }
1287
17505c5c
NC		 1288#ifdef ARM_WINCE
1289 /* MS ARM-CE makes the reloc relative to the opcode's pc, not
d70910e8 1290 the next opcode's pc, so is off by one. */
63222ec9
NC		 1291#if 0 /* This appears to have been true for WINCE 2.0, but it is not
1292 true for WINCE 3.0. */
1049f94e 1293 if (howto->pc_relative && !info->relocatable)
17505c5c 1294 addend -= 8;
63222ec9 1295#endif
17505c5c 1296#endif
d70910e8 1297
1049f94e 1298 /* If we are doing a relocatable link, then we can just ignore
252b5132 1299 a PC relative reloc that is pcrel_offset. It will already
1049f94e 1300 have the correct value. If this is not a relocatable link,
252b5132
RH		 1301 then we should ignore the symbol value. */
1302 if (howto->pc_relative && howto->pcrel_offset)
1303 {
1049f94e 1304 if (info->relocatable)
252b5132 1305 continue;
87748b32
NC		 1306 /* FIXME - it is not clear which targets need this next test
1307 and which do not. It is known that it is needed for the
d8adc60f 1308 VxWorks and EPOC-PE targets, but it is also known that it
5c4491d3 1309 was suppressed for other ARM targets. This ought to be
d8adc60f
NC		 1310 sorted out one day. */
1311#ifdef ARM_COFF_BUGFIX
87748b32
NC		 1312 /* We must not ignore the symbol value. If the symbol is
1313 within the same section, the relocation should have already
1314 been fixed, but if it is not, we'll be handed a reloc into
1315 the beginning of the symbol's section, so we must not cancel
1316 out the symbol's value, otherwise we'll be adding it in
1317 twice. */
252b5132
RH		 1318 if (sym != NULL && sym->n_scnum != 0)
1319 addend += sym->n_value;
ed1de528 1320#endif
252b5132
RH		 1321 }
1322
1323 val = 0;
1324
1325 if (h == NULL)
1326 {
1327 asection *sec;
1328
1329 if (symndx == -1)
1330 {
1331 sec = bfd_abs_section_ptr;
1332 val = 0;
1333 }
1334 else
1335 {
1336 sec = sections[symndx];
1337 val = (sec->output_section->vma
1338 + sec->output_offset
1339 + sym->n_value
1340 - sec->vma);
1341 }
1342 }
1343 else
1344 {
1345#if 1 /* THUMBEXTENSION */
1346 /* We don't output the stubs if we are generating a
1347 relocatable output file, since we may as well leave the
1348 stub generation to the final linker pass. If we fail to
1349 verify that the name is defined, we'll try to build stubs
d70910e8 1350 for an undefined name... */
1049f94e 1351 if (! info->relocatable
252b5132
RH		 1352 && ( h->root.type == bfd_link_hash_defined
1353 || h->root.type == bfd_link_hash_defweak))
1354 {
1355 asection * h_sec = h->root.u.def.section;
1356 const char * name = h->root.root.string;
d70910e8 1357
252b5132
RH		 1358 /* h locates the symbol referenced in the reloc. */
1359 h_val = (h->root.u.def.value
1360 + h_sec->output_section->vma
1361 + h_sec->output_offset);
1362
1363 if (howto->type == ARM_26)
1364 {
1365 if ( h->class == C_THUMBSTATFUNC
1366 || h->class == C_THUMBEXTFUNC)
1367 {
917583ad 1368 /* Arm code calling a Thumb function. */
252b5132 1369 unsigned long int tmp;
dc810e39 1370 bfd_vma my_offset;
252b5132
RH		 1371 asection * s;
1372 long int ret_offset;
d70910e8 1373 struct coff_link_hash_entry * myh;
252b5132 1374 struct coff_arm_link_hash_table * globals;
d70910e8 1375
252b5132
RH		 1376 myh = find_arm_glue (info, name, input_bfd);
1377 if (myh == NULL)
b34976b6 1378 return FALSE;
252b5132
RH		 1379
1380 globals = coff_arm_hash_table (info);
1381
1382 BFD_ASSERT (globals != NULL);
1383 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
d70910e8 1384
252b5132 1385 my_offset = myh->root.u.def.value;
d70910e8
KH		 1386
1387 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
252b5132
RH		 1388 ARM2THUMB_GLUE_SECTION_NAME);
1389 BFD_ASSERT (s != NULL);
1390 BFD_ASSERT (s->contents != NULL);
1391 BFD_ASSERT (s->output_section != NULL);
1392
1393 if ((my_offset & 0x01) == 0x01)
1394 {
1395 if (h_sec->owner != NULL
1396 && INTERWORK_SET (h_sec->owner)
1397 && ! INTERWORK_FLAG (h_sec->owner))
1398 {
1399 _bfd_error_handler
1400 /* xgettext:c-format */
1401 (_("%s(%s): warning: interworking not enabled."),
8f615d07 1402 bfd_archive_filename (h_sec->owner), name);
252b5132
RH		 1403 _bfd_error_handler
1404 /* xgettext:c-format */
1405 (_(" first occurrence: %s: arm call to thumb"),
8f615d07 1406 bfd_archive_filename (input_bfd));
252b5132
RH		 1407 }
1408
1409 --my_offset;
1410 myh->root.u.def.value = my_offset;
1411
dc810e39 1412 bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
252b5132 1413 s->contents + my_offset);
d70910e8 1414
dc810e39 1415 bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
252b5132 1416 s->contents + my_offset + 4);
d70910e8 1417
252b5132
RH		 1418 /* It's a thumb address. Add the low order bit. */
1419 bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn,
1420 s->contents + my_offset + 8);
1421
1422 if (info->base_file)
d70910e8 1423 arm_emit_base_file_entry (info, output_bfd, s,
dc810e39 1424 my_offset + 8);
252b5132
RH		 1425
1426 }
1427
1428 BFD_ASSERT (my_offset <= globals->arm_glue_size);
1429
1430 tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr
1431 - input_section->vma);
d70910e8 1432
252b5132
RH		 1433 tmp = tmp & 0xFF000000;
1434
d70910e8 1435 /* Somehow these are both 4 too far, so subtract 8. */
252b5132
RH		 1436 ret_offset =
1437 s->output_offset
d70910e8 1438 + my_offset
252b5132
RH		 1439 + s->output_section->vma
1440 - (input_section->output_offset
d70910e8 1441 + input_section->output_section->vma
252b5132
RH		 1442 + rel->r_vaddr)
1443 - 8;
1444
1445 tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
d70910e8 1446
dc810e39
AM		 1447 bfd_put_32 (output_bfd, (bfd_vma) tmp,
1448 contents + rel->r_vaddr - input_section->vma);
252b5132
RH		 1449 done = 1;
1450 }
1451 }
d70910e8 1452
17505c5c 1453#ifndef ARM_WINCE
917583ad 1454 /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12. */
252b5132
RH		 1455 else if (howto->type == ARM_THUMB23)
1456 {
d70910e8 1457 if ( h->class == C_EXT
252b5132
RH		 1458 || h->class == C_STAT
1459 || h->class == C_LABEL)
1460 {
1461 /* Thumb code calling an ARM function */
1462 asection * s = 0;
dc810e39 1463 bfd_vma my_offset;
252b5132
RH		 1464 unsigned long int tmp;
1465 long int ret_offset;
1466 struct coff_link_hash_entry * myh;
1467 struct coff_arm_link_hash_table * globals;
1468
1469 myh = find_thumb_glue (info, name, input_bfd);
1470 if (myh == NULL)
b34976b6 1471 return FALSE;
252b5132
RH		 1472
1473 globals = coff_arm_hash_table (info);
d70910e8 1474
252b5132
RH		 1475 BFD_ASSERT (globals != NULL);
1476 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
d70910e8 1477
252b5132 1478 my_offset = myh->root.u.def.value;
d70910e8
KH		 1479
1480 s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
252b5132 1481 THUMB2ARM_GLUE_SECTION_NAME);
d70910e8 1482
252b5132
RH		 1483 BFD_ASSERT (s != NULL);
1484 BFD_ASSERT (s->contents != NULL);
1485 BFD_ASSERT (s->output_section != NULL);
d70910e8 1486
252b5132
RH		 1487 if ((my_offset & 0x01) == 0x01)
1488 {
1489 if (h_sec->owner != NULL
1490 && INTERWORK_SET (h_sec->owner)
1491 && ! INTERWORK_FLAG (h_sec->owner)
1492 && ! globals->support_old_code)
1493 {
1494 _bfd_error_handler
1495 /* xgettext:c-format */
1496 (_("%s(%s): warning: interworking not enabled."),
8f615d07 1497 bfd_archive_filename (h_sec->owner), name);
252b5132
RH		 1498 _bfd_error_handler
1499 /* xgettext:c-format */
1500 (_(" first occurrence: %s: thumb call to arm"),
8f615d07 1501 bfd_archive_filename (input_bfd));
252b5132
RH		 1502 _bfd_error_handler
1503 (_(" consider relinking with --support-old-code enabled"));
1504 }
d70910e8 1505
252b5132
RH		 1506 -- my_offset;
1507 myh->root.u.def.value = my_offset;
1508
1509 if (globals->support_old_code)
1510 {
dc810e39 1511 bfd_put_16 (output_bfd, (bfd_vma) t2a1_push_insn,
252b5132 1512 s->contents + my_offset);
d70910e8 1513
dc810e39 1514 bfd_put_16 (output_bfd, (bfd_vma) t2a2_ldr_insn,
252b5132
RH		 1515 s->contents + my_offset + 2);
1516
dc810e39 1517 bfd_put_16 (output_bfd, (bfd_vma) t2a3_mov_insn,
252b5132
RH		 1518 s->contents + my_offset + 4);
1519
dc810e39 1520 bfd_put_16 (output_bfd, (bfd_vma) t2a4_bx_insn,
252b5132 1521 s->contents + my_offset + 6);
d70910e8 1522
dc810e39 1523 bfd_put_32 (output_bfd, (bfd_vma) t2a5_pop_insn,
252b5132 1524 s->contents + my_offset + 8);
d70910e8 1525
dc810e39 1526 bfd_put_32 (output_bfd, (bfd_vma) t2a6_bx_insn,
252b5132 1527 s->contents + my_offset + 12);
d70910e8 1528
252b5132
RH		 1529 /* Store the address of the function in the last word of the stub. */
1530 bfd_put_32 (output_bfd, h_val,
1531 s->contents + my_offset + 16);
fa0e42e4
CM		 1532
1533 if (info->base_file)
dc810e39
AM		 1534 arm_emit_base_file_entry (info, output_bfd, s,
1535 my_offset + 16);
252b5132
RH		 1536 }
1537 else
1538 {
dc810e39 1539 bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
252b5132 1540 s->contents + my_offset);
d70910e8 1541
dc810e39 1542 bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
252b5132 1543 s->contents + my_offset + 2);
d70910e8 1544
252b5132 1545 ret_offset =
917583ad 1546 ((bfd_signed_vma) h_val) /* Address of destination of the stub. */
252b5132
RH		 1547 - ((bfd_signed_vma)
1548 (s->output_offset /* Offset from the start of the current section to the start of the stubs. */
1549 + my_offset /* Offset of the start of this stub from the start of the stubs. */
1550 + s->output_section->vma) /* Address of the start of the current section. */
1551 + 4 /* The branch instruction is 4 bytes into the stub. */
1552 + 8); /* ARM branches work from the pc of the instruction + 8. */
d70910e8 1553
252b5132 1554 bfd_put_32 (output_bfd,
dc810e39 1555 (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
252b5132
RH		 1556 s->contents + my_offset + 4);
1557
252b5132
RH		 1558 }
1559 }
1560
1561 BFD_ASSERT (my_offset <= globals->thumb_glue_size);
1562
1563 /* Now go back and fix up the original BL insn to point
1564 to here. */
1565 ret_offset =
1566 s->output_offset
1567 + my_offset
1568 - (input_section->output_offset
1569 + rel->r_vaddr)
1570 -4;
d70910e8 1571
252b5132
RH		 1572 tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr
1573 - input_section->vma);
1574
1575 bfd_put_32 (output_bfd,
dc810e39
AM		 1576 (bfd_vma) insert_thumb_branch (tmp,
1577 ret_offset),
1578 contents + rel->r_vaddr - input_section->vma);
d70910e8 1579
252b5132
RH		 1580 done = 1;
1581 }
1582 }
17505c5c 1583#endif
252b5132 1584 }
d70910e8 1585
252b5132
RH		 1586 /* If the relocation type and destination symbol does not
1587 fall into one of the above categories, then we can just
d70910e8 1588 perform a direct link. */
252b5132
RH		 1589
1590 if (done)
1591 rstat = bfd_reloc_ok;
d70910e8 1592 else
252b5132
RH		 1593#endif /* THUMBEXTENSION */
1594 if ( h->root.type == bfd_link_hash_defined
1595 || h->root.type == bfd_link_hash_defweak)
1596 {
1597 asection *sec;
1598
1599 sec = h->root.u.def.section;
1600 val = (h->root.u.def.value
1601 + sec->output_section->vma
1602 + sec->output_offset);
1603 }
1604
1049f94e 1605 else if (! info->relocatable)
252b5132
RH		 1606 {
1607 if (! ((*info->callbacks->undefined_symbol)
1608 (info, h->root.root.string, input_bfd, input_section,
b34976b6
AM		 1609 rel->r_vaddr - input_section->vma, TRUE)))
1610 return FALSE;
252b5132
RH		 1611 }
1612 }
1613
1614 if (info->base_file)
1615 {
d70910e8 1616 /* Emit a reloc if the backend thinks it needs it. */
252b5132 1617 if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto))
dc810e39
AM		 1618 arm_emit_base_file_entry (info, output_bfd, input_section,
1619 rel->r_vaddr);
252b5132 1620 }
d70910e8 1621
252b5132
RH		 1622#if 1 /* THUMBEXTENSION */
1623 if (done)
1624 rstat = bfd_reloc_ok;
17505c5c 1625#ifndef ARM_WINCE
252b5132 1626 /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
1049f94e 1627 else if (! info->relocatable
252b5132
RH		 1628 && howto->type == ARM_THUMB23)
1629 {
1630 /* This is pretty much a copy of what the default
1631 _bfd_final_link_relocate and _bfd_relocate_contents
1632 routines do to perform a relocation, with special
1633 processing for the split addressing of the Thumb BL
1634 instruction. Again, it would probably be simpler adding a
1635 ThumbBRANCH23 specific macro expansion into the default
1636 code. */
d70910e8 1637
252b5132 1638 bfd_vma address = rel->r_vaddr - input_section->vma;
d70910e8 1639
07515404 1640 if (address > high_address)
252b5132
RH		 1641 rstat = bfd_reloc_outofrange;
1642 else
1643 {
b34976b6
AM		 1644 bfd_vma relocation = val + addend;
1645 int size = bfd_get_reloc_size (howto);
1646 bfd_boolean overflow = FALSE;
1647 bfd_byte *location = contents + address;
1648 bfd_vma x = bfd_get_32 (input_bfd, location);
1649 bfd_vma src_mask = 0x007FFFFE;
1650 bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
1651 bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
1652 bfd_vma check;
1653 bfd_signed_vma signed_check;
1654 bfd_vma add;
1655 bfd_signed_vma signed_add;
252b5132
RH		 1656
1657 BFD_ASSERT (size == 4);
d70910e8 1658
4f3c3dbb 1659 /* howto->pc_relative should be TRUE for type 14 BRANCH23. */
252b5132
RH		 1660 relocation -= (input_section->output_section->vma
1661 + input_section->output_offset);
d70910e8 1662
4f3c3dbb 1663 /* howto->pcrel_offset should be TRUE for type 14 BRANCH23. */
252b5132 1664 relocation -= address;
d70910e8
KH		 1665
1666 /* No need to negate the relocation with BRANCH23. */
252b5132
RH		 1667 /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */
1668 /* howto->rightshift == 1 */
d70910e8 1669
4f3c3dbb 1670 /* Drop unwanted bits from the value we are relocating to. */
252b5132 1671 check = relocation >> howto->rightshift;
d70910e8 1672
252b5132
RH		 1673 /* If this is a signed value, the rightshift just dropped
1674 leading 1 bits (assuming twos complement). */
1675 if ((bfd_signed_vma) relocation >= 0)
1676 signed_check = check;
1677 else
1678 signed_check = (check
1679 | ((bfd_vma) - 1
1680 & ~((bfd_vma) - 1 >> howto->rightshift)));
d70910e8 1681
252b5132
RH		 1682 /* Get the value from the object file. */
1683 if (bfd_big_endian (input_bfd))
4f3c3dbb 1684 add = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1);
252b5132 1685 else
4f3c3dbb 1686 add = ((((x) & 0x7ff) << 12) | (((x) & 0x07ff0000) >> 15));
252b5132
RH		 1687
1688 /* Get the value from the object file with an appropriate sign.
1689 The expression involving howto->src_mask isolates the upper
1690 bit of src_mask. If that bit is set in the value we are
1691 adding, it is negative, and we subtract out that number times
1692 two. If src_mask includes the highest possible bit, then we
1693 can not get the upper bit, but that does not matter since
1694 signed_add needs no adjustment to become negative in that
1695 case. */
252b5132 1696 signed_add = add;
d70910e8 1697
252b5132
RH		 1698 if ((add & (((~ src_mask) >> 1) & src_mask)) != 0)
1699 signed_add -= (((~ src_mask) >> 1) & src_mask) << 1;
d70910e8 1700
4f3c3dbb 1701 /* howto->bitpos == 0 */
252b5132
RH		 1702 /* Add the value from the object file, shifted so that it is a
1703 straight number. */
252b5132 1704 signed_check += signed_add;
4f3c3dbb 1705 relocation += signed_add;
252b5132
RH		 1706
1707 BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed);
1708
1709 /* Assumes two's complement. */
1710 if ( signed_check > reloc_signed_max
1711 || signed_check < reloc_signed_min)
b34976b6 1712 overflow = TRUE;
d70910e8 1713
c62e1cc3
NC		 1714 /* Put the relocation into the correct bits.
1715 For a BLX instruction, make sure that the relocation is rounded up
1716 to a word boundary. This follows the semantics of the instruction
1717 which specifies that bit 1 of the target address will come from bit
1718 1 of the base address. */
252b5132 1719 if (bfd_big_endian (input_bfd))
c62e1cc3
NC		 1720 {
1721 if ((x & 0x1800) == 0x0800 && (relocation & 0x02))
1722 relocation += 2;
1723 relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000));
1724 }
252b5132 1725 else
c62e1cc3
NC		 1726 {
1727 if ((x & 0x18000000) == 0x08000000 && (relocation & 0x02))
1728 relocation += 2;
1729 relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff));
1730 }
d70910e8 1731
4f3c3dbb 1732 /* Add the relocation to the correct bits of X. */
252b5132
RH		 1733 x = ((x & ~howto->dst_mask) | relocation);
1734
4f3c3dbb 1735 /* Put the relocated value back in the object file. */
252b5132
RH		 1736 bfd_put_32 (input_bfd, x, location);
1737
1738 rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok;
1739 }
1740 }
17505c5c 1741#endif
252b5132
RH		 1742 else
1743#endif /* THUMBEXTENSION */
1e7fef1d
NC		 1744 if (info->relocatable && ! howto->partial_inplace)
1745 rstat = bfd_reloc_ok;
1746 else
1747 rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
1748 contents,
1749 rel->r_vaddr - input_section->vma,
1750 val, addend);
252b5132 1751#if 1 /* THUMBEXTENSION */
d70910e8 1752 /* FIXME:
252b5132
RH		 1753 Is this the best way to fix up thumb addresses? krk@cygnus.com
1754 Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */
1755 /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
1049f94e 1756 if (! info->relocatable
b44267fd 1757 && (rel->r_type == ARM_32 || rel->r_type == ARM_RVA32))
252b5132
RH		 1758 {
1759 /* Determine if we need to set the bottom bit of a relocated address
1760 because the address is the address of a Thumb code symbol. */
d70910e8 1761
b34976b6 1762 int patchit = FALSE;
d70910e8 1763
252b5132
RH		 1764 if (h != NULL
1765 && ( h->class == C_THUMBSTATFUNC
1766 || h->class == C_THUMBEXTFUNC))
1767 {
b34976b6 1768 patchit = TRUE;
252b5132
RH		 1769 }
1770 else if (sym != NULL
1771 && sym->n_scnum > N_UNDEF)
1772 {
1773 /* No hash entry - use the symbol instead. */
1774
1775 if ( sym->n_sclass == C_THUMBSTATFUNC
1776 || sym->n_sclass == C_THUMBEXTFUNC)
b34976b6 1777 patchit = TRUE;
252b5132
RH		 1778 }
1779
1780 if (patchit)
1781 {
1782 bfd_byte * location = contents + rel->r_vaddr - input_section->vma;
1783 bfd_vma x = bfd_get_32 (input_bfd, location);
1784
1785 bfd_put_32 (input_bfd, x | 1, location);
1786 }
1787 }
d70910e8
KH		 1788#endif /* THUMBEXTENSION */
1789
252b5132
RH		 1790 switch (rstat)
1791 {
1792 default:
1793 abort ();
1794 case bfd_reloc_ok:
1795 break;
1796 case bfd_reloc_outofrange:
1797 (*_bfd_error_handler)
1798 (_("%s: bad reloc address 0x%lx in section `%s'"),
8f615d07 1799 bfd_archive_filename (input_bfd),
252b5132
RH		 1800 (unsigned long) rel->r_vaddr,
1801 bfd_get_section_name (input_bfd, input_section));
b34976b6 1802 return FALSE;
252b5132
RH		 1803 case bfd_reloc_overflow:
1804 {
1805 const char *name;
1806 char buf[SYMNMLEN + 1];
1807
1808 if (symndx == -1)
1809 name = "*ABS*";
1810 else if (h != NULL)
1811 name = h->root.root.string;
1812 else
1813 {
1814 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
1815 if (name == NULL)
b34976b6 1816 return FALSE;
252b5132
RH		 1817 }
1818
1819 if (! ((*info->callbacks->reloc_overflow)
1820 (info, name, howto->name, (bfd_vma) 0, input_bfd,
1821 input_section, rel->r_vaddr - input_section->vma)))
b34976b6 1822 return FALSE;
252b5132
RH		 1823 }
1824 }
1825 }
1826
b34976b6 1827 return TRUE;
252b5132
RH		 1828}
1829
e049a0de
ILT		 1830#ifndef COFF_IMAGE_WITH_PE
1831
b34976b6 1832bfd_boolean
d70910e8 1833bfd_arm_allocate_interworking_sections (info)
252b5132
RH		 1834 struct bfd_link_info * info;
1835{
1836 asection * s;
1837 bfd_byte * foo;
1838 struct coff_arm_link_hash_table * globals;
1839#if 0
1840 static char test_char = '1';
1841#endif
1842
1843 globals = coff_arm_hash_table (info);
d70910e8 1844
252b5132
RH		 1845 BFD_ASSERT (globals != NULL);
1846
1847 if (globals->arm_glue_size != 0)
1848 {
1849 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
d70910e8 1850
252b5132
RH		 1851 s = bfd_get_section_by_name
1852 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1853
1854 BFD_ASSERT (s != NULL);
d70910e8 1855
dc810e39
AM		 1856 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
1857 globals->arm_glue_size);
252b5132 1858#if 0
dc810e39 1859 memset (foo, test_char, (size_t) globals->arm_glue_size);
252b5132 1860#endif
d70910e8 1861
eea6121a 1862 s->size = globals->arm_glue_size;
252b5132
RH		 1863 s->contents = foo;
1864 }
1865
1866 if (globals->thumb_glue_size != 0)
1867 {
1868 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
d70910e8 1869
252b5132
RH		 1870 s = bfd_get_section_by_name
1871 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1872
1873 BFD_ASSERT (s != NULL);
d70910e8 1874
dc810e39
AM		 1875 foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
1876 globals->thumb_glue_size);
252b5132 1877#if 0
dc810e39 1878 memset (foo, test_char, (size_t) globals->thumb_glue_size);
252b5132 1879#endif
d70910e8 1880
eea6121a 1881 s->size = globals->thumb_glue_size;
252b5132
RH		 1882 s->contents = foo;
1883 }
1884
b34976b6 1885 return TRUE;
252b5132
RH		 1886}
1887
1888static void
1889record_arm_to_thumb_glue (info, h)
1890 struct bfd_link_info * info;
1891 struct coff_link_hash_entry * h;
1892{
1893 const char * name = h->root.root.string;
1894 register asection * s;
1895 char * tmp_name;
1896 struct coff_link_hash_entry * myh;
14a793b2 1897 struct bfd_link_hash_entry * bh;
252b5132 1898 struct coff_arm_link_hash_table * globals;
dc810e39
AM		 1899 bfd_vma val;
1900 bfd_size_type amt;
252b5132
RH		 1901
1902 globals = coff_arm_hash_table (info);
1903
1904 BFD_ASSERT (globals != NULL);
1905 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1906
1907 s = bfd_get_section_by_name
1908 (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
1909
1910 BFD_ASSERT (s != NULL);
1911
dc810e39
AM		 1912 amt = strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1;
1913 tmp_name = (char *) bfd_malloc (amt);
252b5132
RH		 1914
1915 BFD_ASSERT (tmp_name);
1916
1917 sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
d70910e8 1918
252b5132 1919 myh = coff_link_hash_lookup
b34976b6 1920 (coff_hash_table (info), tmp_name, FALSE, FALSE, TRUE);
d70910e8 1921
252b5132
RH		 1922 if (myh != NULL)
1923 {
1924 free (tmp_name);
1925 return; /* we've already seen this guy */
1926 }
1927
1928 /* The only trick here is using globals->arm_glue_size as the value. Even
1929 though the section isn't allocated yet, this is where we will be putting
1930 it. */
1931
14a793b2 1932 bh = NULL;
dc810e39 1933 val = globals->arm_glue_size + 1;
252b5132 1934 bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
b34976b6 1935 BSF_GLOBAL, s, val, NULL, TRUE, FALSE, &bh);
d70910e8 1936
252b5132 1937 free (tmp_name);
d70910e8 1938
252b5132
RH		 1939 globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
1940
1941 return;
1942}
1943
7831a775 1944#ifndef ARM_WINCE
252b5132
RH		 1945static void
1946record_thumb_to_arm_glue (info, h)
1947 struct bfd_link_info * info;
1948 struct coff_link_hash_entry * h;
1949{
1950 const char * name = h->root.root.string;
1951 register asection * s;
1952 char * tmp_name;
1953 struct coff_link_hash_entry * myh;
14a793b2 1954 struct bfd_link_hash_entry * bh;
252b5132 1955 struct coff_arm_link_hash_table * globals;
dc810e39
AM		 1956 bfd_vma val;
1957 bfd_size_type amt;
252b5132 1958
252b5132 1959 globals = coff_arm_hash_table (info);
d70910e8 1960
252b5132
RH		 1961 BFD_ASSERT (globals != NULL);
1962 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
1963
1964 s = bfd_get_section_by_name
1965 (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
1966
1967 BFD_ASSERT (s != NULL);
1968
dc810e39
AM		 1969 amt = strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1;
1970 tmp_name = (char *) bfd_malloc (amt);
252b5132
RH		 1971
1972 BFD_ASSERT (tmp_name);
1973
1974 sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
1975
1976 myh = coff_link_hash_lookup
b34976b6 1977 (coff_hash_table (info), tmp_name, FALSE, FALSE, TRUE);
d70910e8 1978
252b5132
RH		 1979 if (myh != NULL)
1980 {
1981 free (tmp_name);
1982 return; /* we've already seen this guy */
1983 }
1984
14a793b2 1985 bh = NULL;
dc810e39 1986 val = globals->thumb_glue_size + 1;
252b5132 1987 bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
b34976b6 1988 BSF_GLOBAL, s, val, NULL, TRUE, FALSE, &bh);
d70910e8 1989
252b5132 1990 /* If we mark it 'thumb', the disassembler will do a better job. */
14a793b2 1991 myh = (struct coff_link_hash_entry *) bh;
252b5132
RH		 1992 myh->class = C_THUMBEXTFUNC;
1993
1994 free (tmp_name);
1995
1996 /* Allocate another symbol to mark where we switch to arm mode. */
d70910e8 1997
252b5132
RH		 1998#define CHANGE_TO_ARM "__%s_change_to_arm"
1999#define BACK_FROM_ARM "__%s_back_from_arm"
d70910e8 2000
dc810e39
AM		 2001 amt = strlen (name) + strlen (CHANGE_TO_ARM) + 1;
2002 tmp_name = (char *) bfd_malloc (amt);
d70910e8 2003
252b5132 2004 BFD_ASSERT (tmp_name);
d70910e8 2005
252b5132
RH		 2006 sprintf (tmp_name, globals->support_old_code ? BACK_FROM_ARM : CHANGE_TO_ARM, name);
2007
14a793b2 2008 bh = NULL;
dc810e39 2009 val = globals->thumb_glue_size + (globals->support_old_code ? 8 : 4);
252b5132 2010 bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
b34976b6 2011 BSF_LOCAL, s, val, NULL, TRUE, FALSE, &bh);
252b5132 2012
d70910e8
KH		 2013 free (tmp_name);
2014
252b5132
RH		 2015 globals->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
2016
2017 return;
2018}
7831a775 2019#endif /* not ARM_WINCE */
252b5132
RH		 2020
2021/* Select a BFD to be used to hold the sections used by the glue code.
2022 This function is called from the linker scripts in ld/emultempl/
2023 {armcoff/pe}.em */
e049a0de 2024
b34976b6 2025bfd_boolean
252b5132
RH		 2026bfd_arm_get_bfd_for_interworking (abfd, info)
2027 bfd * abfd;
2028 struct bfd_link_info * info;
2029{
2030 struct coff_arm_link_hash_table * globals;
2031 flagword flags;
2032 asection * sec;
d70910e8 2033
252b5132
RH		 2034 /* If we are only performing a partial link do not bother
2035 getting a bfd to hold the glue. */
1049f94e 2036 if (info->relocatable)
b34976b6 2037 return TRUE;
d70910e8 2038
252b5132 2039 globals = coff_arm_hash_table (info);
d70910e8 2040
252b5132
RH		 2041 BFD_ASSERT (globals != NULL);
2042
2043 if (globals->bfd_of_glue_owner != NULL)
b34976b6 2044 return TRUE;
d70910e8 2045
252b5132 2046 sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
d70910e8
KH		 2047
2048 if (sec == NULL)
252b5132 2049 {
ba3d4249 2050 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
d70910e8 2051
252b5132 2052 sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
d70910e8 2053
252b5132
RH		 2054 if (sec == NULL
2055 || ! bfd_set_section_flags (abfd, sec, flags)
2056 || ! bfd_set_section_alignment (abfd, sec, 2))
b34976b6 2057 return FALSE;
252b5132
RH		 2058 }
2059
2060 sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
2061
d70910e8 2062 if (sec == NULL)
252b5132 2063 {
ba3d4249 2064 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
d70910e8 2065
252b5132 2066 sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
d70910e8 2067
252b5132
RH		 2068 if (sec == NULL
2069 || ! bfd_set_section_flags (abfd, sec, flags)
2070 || ! bfd_set_section_alignment (abfd, sec, 2))
b34976b6 2071 return FALSE;
252b5132 2072 }
d70910e8 2073
252b5132
RH		 2074 /* Save the bfd for later use. */
2075 globals->bfd_of_glue_owner = abfd;
d70910e8 2076
b34976b6 2077 return TRUE;
252b5132
RH		 2078}
2079
b34976b6 2080bfd_boolean
252b5132
RH		 2081bfd_arm_process_before_allocation (abfd, info, support_old_code)
2082 bfd * abfd;
2083 struct bfd_link_info * info;
2084 int support_old_code;
2085{
2086 asection * sec;
2087 struct coff_arm_link_hash_table * globals;
2088
2089 /* If we are only performing a partial link do not bother
2090 to construct any glue. */
1049f94e 2091 if (info->relocatable)
b34976b6 2092 return TRUE;
d70910e8 2093
252b5132
RH		 2094 /* Here we have a bfd that is to be included on the link. We have a hook
2095 to do reloc rummaging, before section sizes are nailed down. */
2096
2097 _bfd_coff_get_external_symbols (abfd);
2098
2099 globals = coff_arm_hash_table (info);
d70910e8 2100
252b5132
RH		 2101 BFD_ASSERT (globals != NULL);
2102 BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
2103
2104 globals->support_old_code = support_old_code;
d70910e8 2105
252b5132
RH		 2106 /* Rummage around all the relocs and map the glue vectors. */
2107 sec = abfd->sections;
2108
2109 if (sec == NULL)
b34976b6 2110 return TRUE;
252b5132
RH		 2111
2112 for (; sec != NULL; sec = sec->next)
2113 {
2114 struct internal_reloc * i;
2115 struct internal_reloc * rel;
2116
d70910e8 2117 if (sec->reloc_count == 0)
252b5132
RH		 2118 continue;
2119
2120 /* Load the relocs. */
d70910e8
KH		 2121 /* FIXME: there may be a storage leak here. */
2122
252b5132 2123 i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0);
d70910e8 2124
252b5132
RH		 2125 BFD_ASSERT (i != 0);
2126
d70910e8 2127 for (rel = i; rel < i + sec->reloc_count; ++rel)
252b5132
RH		 2128 {
2129 unsigned short r_type = rel->r_type;
86033394 2130 long symndx;
252b5132
RH		 2131 struct coff_link_hash_entry * h;
2132
2133 symndx = rel->r_symndx;
2134
d70910e8 2135 /* If the relocation is not against a symbol it cannot concern us. */
252b5132
RH		 2136 if (symndx == -1)
2137 continue;
2138
17505c5c 2139 /* If the index is outside of the range of our table, something has gone wrong. */
af74ae99
NC		 2140 if (symndx >= obj_conv_table_size (abfd))
2141 {
2142 _bfd_error_handler (_("%s: illegal symbol index in reloc: %d"),
8f615d07 2143 bfd_archive_filename (abfd), symndx);
af74ae99
NC		 2144 continue;
2145 }
d70910e8 2146
252b5132
RH		 2147 h = obj_coff_sym_hashes (abfd)[symndx];
2148
2149 /* If the relocation is against a static symbol it must be within
2150 the current section and so cannot be a cross ARM/Thumb relocation. */
2151 if (h == NULL)
2152 continue;
2153
2154 switch (r_type)
2155 {
2156 case ARM_26:
2157 /* This one is a call from arm code. We need to look up
2158 the target of the call. If it is a thumb target, we
2159 insert glue. */
d70910e8 2160
252b5132
RH		 2161 if (h->class == C_THUMBEXTFUNC)
2162 record_arm_to_thumb_glue (info, h);
2163 break;
d70910e8 2164
17505c5c 2165#ifndef ARM_WINCE
252b5132
RH		 2166 case ARM_THUMB23:
2167 /* This one is a call from thumb code. We used to look
2168 for ARM_THUMB9 and ARM_THUMB12 as well. We need to look
2169 up the target of the call. If it is an arm target, we
2170 insert glue. If the symbol does not exist it will be
2171 given a class of C_EXT and so we will generate a stub
2172 for it. This is not really a problem, since the link
2173 is doomed anyway. */
2174
2175 switch (h->class)
2176 {
2177 case C_EXT:
2178 case C_STAT:
2179 case C_LABEL:
2180 record_thumb_to_arm_glue (info, h);
2181 break;
2182 default:
2183 ;
2184 }
2185 break;
17505c5c 2186#endif
d70910e8 2187
252b5132
RH		 2188 default:
2189 break;
2190 }
2191 }
2192 }
2193
b34976b6 2194 return TRUE;
252b5132
RH		 2195}
2196
e049a0de
ILT		 2197#endif /* ! defined (COFF_IMAGE_WITH_PE) */
2198
252b5132
RH		 2199#define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup
2200#define coff_relocate_section coff_arm_relocate_section
2201#define coff_bfd_is_local_label_name coff_arm_is_local_label_name
2202#define coff_adjust_symndx coff_arm_adjust_symndx
2203#define coff_link_output_has_begun coff_arm_link_output_has_begun
2204#define coff_final_link_postscript coff_arm_final_link_postscript
2205#define coff_bfd_merge_private_bfd_data coff_arm_merge_private_bfd_data
2206#define coff_bfd_print_private_bfd_data coff_arm_print_private_bfd_data
2207#define coff_bfd_set_private_flags _bfd_coff_arm_set_private_flags
2208#define coff_bfd_copy_private_bfd_data coff_arm_copy_private_bfd_data
2209#define coff_bfd_link_hash_table_create coff_arm_link_hash_table_create
2210
d21356d8
NC		 2211/* When doing a relocatable link, we want to convert ARM_26 relocs
2212 into ARM_26D relocs. */
252b5132 2213
b34976b6 2214static bfd_boolean
252b5132 2215coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
5f771d47
ILT		 2216 bfd *obfd ATTRIBUTE_UNUSED;
2217 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH		 2218 bfd *ibfd;
2219 asection *sec;
2220 struct internal_reloc *irel;
b34976b6 2221 bfd_boolean *adjustedp;
252b5132 2222{
d21356d8 2223 if (irel->r_type == ARM_26)
252b5132
RH		 2224 {
2225 struct coff_link_hash_entry *h;
2226
2227 h = obj_coff_sym_hashes (ibfd)[irel->r_symndx];
2228 if (h != NULL
2229 && (h->root.type == bfd_link_hash_defined
2230 || h->root.type == bfd_link_hash_defweak)
2231 && h->root.u.def.section->output_section == sec->output_section)
d21356d8 2232 irel->r_type = ARM_26D;
252b5132 2233 }
b34976b6
AM		 2234 *adjustedp = FALSE;
2235 return TRUE;
252b5132
RH		 2236}
2237
2238/* Called when merging the private data areas of two BFDs.
2239 This is important as it allows us to detect if we are
2240 attempting to merge binaries compiled for different ARM
5c4491d3 2241 targets, eg different CPUs or different APCS's. */
252b5132 2242
b34976b6 2243static bfd_boolean
252b5132
RH		 2244coff_arm_merge_private_bfd_data (ibfd, obfd)
2245 bfd * ibfd;
2246 bfd * obfd;
2247{
2248 BFD_ASSERT (ibfd != NULL && obfd != NULL);
2249
2250 if (ibfd == obfd)
b34976b6 2251 return TRUE;
252b5132
RH		 2252
2253 /* If the two formats are different we cannot merge anything.
2254 This is not an error, since it is permissable to change the
2255 input and output formats. */
2256 if ( ibfd->xvec->flavour != bfd_target_coff_flavour
2257 || obfd->xvec->flavour != bfd_target_coff_flavour)
b34976b6 2258 return TRUE;
252b5132 2259
5a6c6817
NC		 2260 /* Determine what should happen if the input ARM architecture
2261 does not match the output ARM architecture. */
2262 if (! bfd_arm_merge_machines (ibfd, obfd))
2263 return FALSE;
2264
2265 /* Verify that the APCS is the same for the two BFDs. */
252b5132
RH		 2266 if (APCS_SET (ibfd))
2267 {
2268 if (APCS_SET (obfd))
2269 {
2270 /* If the src and dest have different APCS flag bits set, fail. */
2271 if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd))
2272 {
2273 _bfd_error_handler
2274 /* xgettext: c-format */
6c571f00 2275 (_("ERROR: %s is compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
8f615d07 2276 bfd_archive_filename (ibfd), APCS_26_FLAG (ibfd) ? 26 : 32,
252b5132
RH		 2277 bfd_get_filename (obfd), APCS_26_FLAG (obfd) ? 26 : 32
2278 );
2279
2280 bfd_set_error (bfd_error_wrong_format);
b34976b6 2281 return FALSE;
252b5132 2282 }
d70910e8 2283
252b5132
RH		 2284 if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd))
2285 {
2286 const char *msg;
2287
2288 if (APCS_FLOAT_FLAG (ibfd))
2289 /* xgettext: c-format */
6c571f00 2290 msg = _("ERROR: %s passes floats in float registers, whereas %s passes them in integer registers");
252b5132
RH		 2291 else
2292 /* xgettext: c-format */
6c571f00 2293 msg = _("ERROR: %s passes floats in integer registers, whereas %s passes them in float registers");
d70910e8 2294
8f615d07 2295 _bfd_error_handler (msg, bfd_archive_filename (ibfd),
252b5132
RH		 2296 bfd_get_filename (obfd));
2297
2298 bfd_set_error (bfd_error_wrong_format);
b34976b6 2299 return FALSE;
252b5132 2300 }
d70910e8 2301
252b5132
RH		 2302 if (PIC_FLAG (obfd) != PIC_FLAG (ibfd))
2303 {
2304 const char * msg;
2305
2306 if (PIC_FLAG (ibfd))
2307 /* xgettext: c-format */
6c571f00 2308 msg = _("ERROR: %s is compiled as position independent code, whereas target %s is absolute position");
252b5132
RH		 2309 else
2310 /* xgettext: c-format */
6c571f00 2311 msg = _("ERROR: %s is compiled as absolute position code, whereas target %s is position independent");
8f615d07 2312 _bfd_error_handler (msg, bfd_archive_filename (ibfd),
252b5132
RH		 2313 bfd_get_filename (obfd));
2314
2315 bfd_set_error (bfd_error_wrong_format);
b34976b6 2316 return FALSE;
252b5132
RH		 2317 }
2318 }
2319 else
2320 {
2321 SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd));
d70910e8 2322
252b5132
RH		 2323 /* Set up the arch and fields as well as these are probably wrong. */
2324 bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
2325 }
2326 }
2327
2328 /* Check the interworking support. */
2329 if (INTERWORK_SET (ibfd))
2330 {
2331 if (INTERWORK_SET (obfd))
2332 {
2333 /* If the src and dest differ in their interworking issue a warning. */
2334 if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd))
2335 {
2336 const char * msg;
2337
2338 if (INTERWORK_FLAG (ibfd))
2339 /* xgettext: c-format */
6c571f00 2340 msg = _("Warning: %s supports interworking, whereas %s does not");
252b5132
RH		 2341 else
2342 /* xgettext: c-format */
6c571f00 2343 msg = _("Warning: %s does not support interworking, whereas %s does");
d70910e8 2344
8f615d07 2345 _bfd_error_handler (msg, bfd_archive_filename (ibfd),
252b5132
RH		 2346 bfd_get_filename (obfd));
2347 }
2348 }
2349 else
2350 {
2351 SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd));
2352 }
2353 }
2354
b34976b6 2355 return TRUE;
252b5132
RH		 2356}
2357
252b5132
RH		 2358/* Display the flags field. */
2359
b34976b6 2360static bfd_boolean
252b5132
RH		 2361coff_arm_print_private_bfd_data (abfd, ptr)
2362 bfd * abfd;
2363 PTR ptr;
2364{
2365 FILE * file = (FILE *) ptr;
d70910e8 2366
252b5132 2367 BFD_ASSERT (abfd != NULL && ptr != NULL);
d70910e8 2368
252b5132
RH		 2369 /* xgettext:c-format */
2370 fprintf (file, _("private flags = %x:"), coff_data (abfd)->flags);
d70910e8 2371
252b5132
RH		 2372 if (APCS_SET (abfd))
2373 {
5c4491d3 2374 /* xgettext: APCS is ARM Procedure Call Standard, it should not be translated. */
252b5132
RH		 2375 fprintf (file, " [APCS-%d]", APCS_26_FLAG (abfd) ? 26 : 32);
2376
2377 if (APCS_FLOAT_FLAG (abfd))
2378 fprintf (file, _(" [floats passed in float registers]"));
2379 else
2380 fprintf (file, _(" [floats passed in integer registers]"));
2381
2382 if (PIC_FLAG (abfd))
2383 fprintf (file, _(" [position independent]"));
2384 else
2385 fprintf (file, _(" [absolute position]"));
2386 }
d70910e8 2387
252b5132
RH		 2388 if (! INTERWORK_SET (abfd))
2389 fprintf (file, _(" [interworking flag not initialised]"));
2390 else if (INTERWORK_FLAG (abfd))
2391 fprintf (file, _(" [interworking supported]"));
2392 else
2393 fprintf (file, _(" [interworking not supported]"));
d70910e8 2394
252b5132 2395 fputc ('\n', file);
d70910e8 2396
b34976b6 2397 return TRUE;
252b5132
RH		 2398}
2399
252b5132
RH		 2400/* Copies the given flags into the coff_tdata.flags field.
2401 Typically these flags come from the f_flags[] field of
2402 the COFF filehdr structure, which contains important,
2403 target specific information.
2404 Note: Although this function is static, it is explicitly
2405 called from both coffcode.h and peicode.h. */
2406
b34976b6 2407static bfd_boolean
252b5132
RH		 2408_bfd_coff_arm_set_private_flags (abfd, flags)
2409 bfd * abfd;
2410 flagword flags;
2411{
2412 flagword flag;
2413
2414 BFD_ASSERT (abfd != NULL);
2415
2416 flag = (flags & F_APCS26) ? F_APCS_26 : 0;
d70910e8 2417
252b5132
RH		 2418 /* Make sure that the APCS field has not been initialised to the opposite
2419 value. */
2420 if (APCS_SET (abfd)
2421 && ( (APCS_26_FLAG (abfd) != flag)
2422 || (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT))
948221a8 2423 || (PIC_FLAG (abfd) != (flags & F_PIC))
252b5132 2424 ))
b34976b6 2425 return FALSE;
252b5132
RH		 2426
2427 flag |= (flags & (F_APCS_FLOAT | F_PIC));
d70910e8 2428
252b5132
RH		 2429 SET_APCS_FLAGS (abfd, flag);
2430
2431 flag = (flags & F_INTERWORK);
d70910e8 2432
252b5132
RH		 2433 /* If the BFD has already had its interworking flag set, but it
2434 is different from the value that we have been asked to set,
2435 then assume that that merged code will not support interworking
2436 and set the flag accordingly. */
2437 if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag))
2438 {
2439 if (flag)
2440 /* xgettext: c-format */
ae1a89b7 2441 _bfd_error_handler (_("Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"),
8f615d07 2442 bfd_archive_filename (abfd));
252b5132
RH		 2443 else
2444 /* xgettext: c-format */
2445 _bfd_error_handler (_("Warning: Clearing the interworking flag of %s due to outside request"),
8f615d07 2446 bfd_archive_filename (abfd));
252b5132
RH		 2447 flag = 0;
2448 }
2449
2450 SET_INTERWORK_FLAG (abfd, flag);
2451
b34976b6 2452 return TRUE;
252b5132
RH		 2453}
2454
252b5132
RH		 2455/* Copy the important parts of the target specific data
2456 from one instance of a BFD to another. */
2457
b34976b6 2458static bfd_boolean
252b5132
RH		 2459coff_arm_copy_private_bfd_data (src, dest)
2460 bfd * src;
2461 bfd * dest;
2462{
2463 BFD_ASSERT (src != NULL && dest != NULL);
d70910e8 2464
252b5132 2465 if (src == dest)
b34976b6 2466 return TRUE;
252b5132
RH		 2467
2468 /* If the destination is not in the same format as the source, do not do
2469 the copy. */
2470 if (src->xvec != dest->xvec)
b34976b6 2471 return TRUE;
252b5132
RH		 2472
2473 /* copy the flags field */
2474 if (APCS_SET (src))
2475 {
2476 if (APCS_SET (dest))
2477 {
2478 /* If the src and dest have different APCS flag bits set, fail. */
2479 if (APCS_26_FLAG (dest) != APCS_26_FLAG (src))
b34976b6 2480 return FALSE;
d70910e8 2481
252b5132 2482 if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src))
b34976b6 2483 return FALSE;
d70910e8 2484
252b5132 2485 if (PIC_FLAG (dest) != PIC_FLAG (src))
b34976b6 2486 return FALSE;
252b5132
RH		 2487 }
2488 else
2489 SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src)
2490 | PIC_FLAG (src));
2491 }
2492
2493 if (INTERWORK_SET (src))
2494 {
2495 if (INTERWORK_SET (dest))
2496 {
2497 /* If the src and dest have different interworking flags then turn
2498 off the interworking bit. */
2499 if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src))
2500 {
2501 if (INTERWORK_FLAG (dest))
2502 {
2503 /* xgettext:c-format */
ae1a89b7
PT		 2504 _bfd_error_handler (("\
2505Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"),
252b5132 2506 bfd_get_filename (dest),
8f615d07 2507 bfd_archive_filename (src));
252b5132 2508 }
d70910e8 2509
252b5132
RH		 2510 SET_INTERWORK_FLAG (dest, 0);
2511 }
2512 }
2513 else
2514 {
2515 SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src));
2516 }
2517 }
2518
b34976b6 2519 return TRUE;
252b5132
RH		 2520}
2521
2522/* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX
c31c1f70
NC		 2523 *must* match the definitions in gcc/config/arm/{coff|semi|aout}.h. */
2524#define LOCAL_LABEL_PREFIX ""
252b5132
RH		 2525#ifndef USER_LABEL_PREFIX
2526#define USER_LABEL_PREFIX "_"
2527#endif
2528
f8111282
NC		 2529/* Like _bfd_coff_is_local_label_name, but
2530 a) test against USER_LABEL_PREFIX, to avoid stripping labels known to be
2531 non-local.
2532 b) Allow other prefixes than ".", e.g. an empty prefix would cause all
2533 labels of the form Lxxx to be stripped. */
b34976b6 2534static bfd_boolean
252b5132 2535coff_arm_is_local_label_name (abfd, name)
5f771d47 2536 bfd * abfd ATTRIBUTE_UNUSED;
252b5132
RH		 2537 const char * name;
2538{
252b5132
RH		 2539#ifdef USER_LABEL_PREFIX
2540 if (USER_LABEL_PREFIX[0] != 0)
2541 {
2542 if (strncmp (name, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)) == 0)
b34976b6 2543 return FALSE;
252b5132
RH		 2544 }
2545#endif
f8111282
NC		 2546
2547#ifdef LOCAL_LABEL_PREFIX
2548 /* If there is a prefix for local labels then look for this.
d70910e8
KH		 2549 If the prefix exists, but it is empty, then ignore the test. */
2550
f8111282 2551 if (LOCAL_LABEL_PREFIX[0] != 0)
252b5132 2552 {
dc810e39 2553 size_t len = strlen (LOCAL_LABEL_PREFIX);
d70910e8 2554
f8111282 2555 if (strncmp (name, LOCAL_LABEL_PREFIX, len) != 0)
b34976b6 2556 return FALSE;
d70910e8 2557
f8111282
NC		 2558 /* Perform the checks below for the rest of the name. */
2559 name += len;
252b5132 2560 }
f8111282 2561#endif
d70910e8 2562
f8111282 2563 return name[0] == 'L';
252b5132
RH		 2564}
2565
2566/* This piece of machinery exists only to guarantee that the bfd that holds
d70910e8 2567 the glue section is written last.
252b5132
RH		 2568
2569 This does depend on bfd_make_section attaching a new section to the
d70910e8 2570 end of the section list for the bfd.
252b5132
RH		 2571
2572 krk@cygnus.com */
2573
b34976b6 2574static bfd_boolean
252b5132
RH		 2575coff_arm_link_output_has_begun (sub, info)
2576 bfd * sub;
2577 struct coff_final_link_info * info;
2578{
2579 return (sub->output_has_begun
2580 || sub == coff_arm_hash_table (info->info)->bfd_of_glue_owner);
2581}
2582
b34976b6 2583static bfd_boolean
252b5132 2584coff_arm_final_link_postscript (abfd, pfinfo)
5f771d47 2585 bfd * abfd ATTRIBUTE_UNUSED;
252b5132
RH		 2586 struct coff_final_link_info * pfinfo;
2587{
2588 struct coff_arm_link_hash_table * globals;
2589
2590 globals = coff_arm_hash_table (pfinfo->info);
d70910e8 2591
252b5132 2592 BFD_ASSERT (globals != NULL);
d70910e8 2593
252b5132
RH		 2594 if (globals->bfd_of_glue_owner != NULL)
2595 {
2596 if (! _bfd_coff_link_input_bfd (pfinfo, globals->bfd_of_glue_owner))
b34976b6 2597 return FALSE;
d70910e8 2598
b34976b6 2599 globals->bfd_of_glue_owner->output_has_begun = TRUE;
252b5132 2600 }
d70910e8 2601
5a6c6817 2602 return bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
252b5132
RH		 2603}
2604
252b5132
RH		 2605#include "coffcode.h"
2606
c3c89269
NC		 2607#ifndef TARGET_LITTLE_SYM
2608#define TARGET_LITTLE_SYM armcoff_little_vec
252b5132 2609#endif
c3c89269
NC		 2610#ifndef TARGET_LITTLE_NAME
2611#define TARGET_LITTLE_NAME "coff-arm-little"
252b5132 2612#endif
c3c89269
NC		 2613#ifndef TARGET_BIG_SYM
2614#define TARGET_BIG_SYM armcoff_big_vec
252b5132 2615#endif
c3c89269
NC		 2616#ifndef TARGET_BIG_NAME
2617#define TARGET_BIG_NAME "coff-arm-big"
252b5132 2618#endif
252b5132 2619
c3c89269
NC		 2620#ifndef TARGET_UNDERSCORE
2621#define TARGET_UNDERSCORE 0
252b5132 2622#endif
c3c89269 2623
f78c5281 2624#ifndef EXTRA_S_FLAGS
c3c89269 2625#ifdef COFF_WITH_PE
20650579 2626#define EXTRA_S_FLAGS (SEC_CODE | SEC_LINK_ONCE | SEC_LINK_DUPLICATES)
252b5132 2627#else
20650579 2628#define EXTRA_S_FLAGS SEC_CODE
252b5132 2629#endif
f78c5281 2630#endif
252b5132 2631
c3c89269
NC		 2632/* Forward declaration for use initialising alternative_target field. */
2633extern const bfd_target TARGET_BIG_SYM ;
252b5132 2634
c3c89269 2635/* Target vectors. */
3fa78519
SS		 2636CREATE_LITTLE_COFF_TARGET_VEC (TARGET_LITTLE_SYM, TARGET_LITTLE_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_BIG_SYM, COFF_SWAP_TABLE)
2637CREATE_BIG_COFF_TARGET_VEC (TARGET_BIG_SYM, TARGET_BIG_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_LITTLE_SYM, COFF_SWAP_TABLE)
GDB Binutils - Deliverables
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