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[/] [or1k/] [trunk/] [insight/] [bfd/] [bfd.c] - Blame information for rev 1776

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1 578 markom
/* Generic BFD library interface and support routines.
2
   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3
   2000, 2001
4
   Free Software Foundation, Inc.
5
   Written by Cygnus Support.
6
 
7
This file is part of BFD, the Binary File Descriptor library.
8
 
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.
13
 
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.
18
 
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.  */
22
 
23
/*
24
SECTION
25
        <<typedef bfd>>
26
 
27
        A BFD has type <<bfd>>; objects of this type are the
28
        cornerstone of any application using BFD. Using BFD
29
        consists of making references though the BFD and to data in the BFD.
30
 
31
        Here is the structure that defines the type <<bfd>>.  It
32
        contains the major data about the file and pointers
33
        to the rest of the data.
34
 
35
CODE_FRAGMENT
36
.
37
.struct _bfd
38
.{
39
.    {* The filename the application opened the BFD with.  *}
40
.    CONST char *filename;
41
.
42
.    {* A pointer to the target jump table.             *}
43
.    const struct bfd_target *xvec;
44
.
45
.    {* To avoid dragging too many header files into every file that
46
.       includes `<<bfd.h>>', IOSTREAM has been declared as a "char
47
.       *", and MTIME as a "long".  Their correct types, to which they
48
.       are cast when used, are "FILE *" and "time_t".    The iostream
49
.       is the result of an fopen on the filename.  However, if the
50
.       BFD_IN_MEMORY flag is set, then iostream is actually a pointer
51
.       to a bfd_in_memory struct.  *}
52
.    PTR iostream;
53
.
54
.    {* Is the file descriptor being cached?  That is, can it be closed as
55
.       needed, and re-opened when accessed later?  *}
56
.
57
.    boolean cacheable;
58
.
59
.    {* Marks whether there was a default target specified when the
60
.       BFD was opened. This is used to select which matching algorithm
61
.       to use to choose the back end. *}
62
.
63
.    boolean target_defaulted;
64
.
65
.    {* The caching routines use these to maintain a
66
.       least-recently-used list of BFDs *}
67
.
68
.    struct _bfd *lru_prev, *lru_next;
69
.
70
.    {* When a file is closed by the caching routines, BFD retains
71
.       state information on the file here: *}
72
.
73
.    file_ptr where;
74
.
75
.    {* and here: (``once'' means at least once) *}
76
.
77
.    boolean opened_once;
78
.
79
.    {* Set if we have a locally maintained mtime value, rather than
80
.       getting it from the file each time: *}
81
.
82
.    boolean mtime_set;
83
.
84
.    {* File modified time, if mtime_set is true: *}
85
.
86
.    long mtime;
87
.
88
.    {* Reserved for an unimplemented file locking extension.*}
89
.
90
.    int ifd;
91
.
92
.    {* The format which belongs to the BFD. (object, core, etc.) *}
93
.
94
.    bfd_format format;
95
.
96
.    {* The direction the BFD was opened with*}
97
.
98
.    enum bfd_direction {no_direction = 0,
99
.                        read_direction = 1,
100
.                        write_direction = 2,
101
.                        both_direction = 3} direction;
102
.
103
.    {* Format_specific flags*}
104
.
105
.    flagword flags;
106
.
107
.    {* Currently my_archive is tested before adding origin to
108
.       anything. I believe that this can become always an add of
109
.       origin, with origin set to 0 for non archive files.   *}
110
.
111
.    file_ptr origin;
112
.
113
.    {* Remember when output has begun, to stop strange things
114
.       from happening. *}
115
.    boolean output_has_begun;
116
.
117
.    {* Pointer to linked list of sections*}
118
.    struct sec  *sections;
119
.
120
.    {* The number of sections *}
121
.    unsigned int section_count;
122
.
123
.    {* Stuff only useful for object files:
124
.       The start address. *}
125
.    bfd_vma start_address;
126
.
127
.    {* Used for input and output*}
128
.    unsigned int symcount;
129
.
130
.    {* Symbol table for output BFD (with symcount entries) *}
131
.    struct symbol_cache_entry  **outsymbols;
132
.
133
.    {* Pointer to structure which contains architecture information*}
134
.    const struct bfd_arch_info *arch_info;
135
.
136
.    {* Stuff only useful for archives:*}
137
.    PTR arelt_data;
138
.    struct _bfd *my_archive;     {* The containing archive BFD.  *}
139
.    struct _bfd *next;           {* The next BFD in the archive.  *}
140
.    struct _bfd *archive_head;   {* The first BFD in the archive.  *}
141
.    boolean has_armap;
142
.
143
.    {* A chain of BFD structures involved in a link.  *}
144
.    struct _bfd *link_next;
145
.
146
.    {* A field used by _bfd_generic_link_add_archive_symbols.  This will
147
.       be used only for archive elements.  *}
148
.    int archive_pass;
149
.
150
.    {* Used by the back end to hold private data. *}
151
.
152
.    union
153
.      {
154
.      struct aout_data_struct *aout_data;
155
.      struct artdata *aout_ar_data;
156
.      struct _oasys_data *oasys_obj_data;
157
.      struct _oasys_ar_data *oasys_ar_data;
158
.      struct coff_tdata *coff_obj_data;
159
.      struct pe_tdata *pe_obj_data;
160
.      struct xcoff_tdata *xcoff_obj_data;
161
.      struct ecoff_tdata *ecoff_obj_data;
162
.      struct ieee_data_struct *ieee_data;
163
.      struct ieee_ar_data_struct *ieee_ar_data;
164
.      struct srec_data_struct *srec_data;
165
.      struct ihex_data_struct *ihex_data;
166
.      struct tekhex_data_struct *tekhex_data;
167
.      struct elf_obj_tdata *elf_obj_data;
168
.      struct nlm_obj_tdata *nlm_obj_data;
169
.      struct bout_data_struct *bout_data;
170
.      struct sun_core_struct *sun_core_data;
171
.      struct sco5_core_struct *sco5_core_data;
172
.      struct trad_core_struct *trad_core_data;
173
.      struct som_data_struct *som_data;
174
.      struct hpux_core_struct *hpux_core_data;
175
.      struct hppabsd_core_struct *hppabsd_core_data;
176
.      struct sgi_core_struct *sgi_core_data;
177
.      struct lynx_core_struct *lynx_core_data;
178
.      struct osf_core_struct *osf_core_data;
179
.      struct cisco_core_struct *cisco_core_data;
180
.      struct versados_data_struct *versados_data;
181
.      struct netbsd_core_struct *netbsd_core_data;
182
.      PTR any;
183
.      } tdata;
184
.
185
.    {* Used by the application to hold private data*}
186
.    PTR usrdata;
187
.
188
.  {* Where all the allocated stuff under this BFD goes.  This is a
189
.     struct objalloc *, but we use PTR to avoid requiring the inclusion of
190
.     objalloc.h.  *}
191
.    PTR memory;
192
.};
193
.
194
*/
195
 
196
#include "bfd.h"
197
#include "sysdep.h"
198
 
199
#ifdef ANSI_PROTOTYPES
200
#include <stdarg.h>
201
#else
202
#include <varargs.h>
203
#endif
204
 
205
#include "libiberty.h"
206
#include "bfdlink.h"
207
#include "libbfd.h"
208
#include "coff/internal.h"
209
#include "coff/sym.h"
210
#include "libcoff.h"
211
#include "libecoff.h"
212
#undef obj_symbols
213
#include "elf-bfd.h"
214
 
215
#include <ctype.h>
216
 
217
/* provide storage for subsystem, stack and heap data which may have been
218
   passed in on the command line.  Ld puts this data into a bfd_link_info
219
   struct which ultimately gets passed in to the bfd.  When it arrives, copy
220
   it to the following struct so that the data will be available in coffcode.h
221
   where it is needed.  The typedef's used are defined in bfd.h */
222
 
223
/*
224
SECTION
225
        Error reporting
226
 
227
        Most BFD functions return nonzero on success (check their
228
        individual documentation for precise semantics).  On an error,
229
        they call <<bfd_set_error>> to set an error condition that callers
230
        can check by calling <<bfd_get_error>>.
231
        If that returns <<bfd_error_system_call>>, then check
232
        <<errno>>.
233
 
234
        The easiest way to report a BFD error to the user is to
235
        use <<bfd_perror>>.
236
 
237
SUBSECTION
238
        Type <<bfd_error_type>>
239
 
240
        The values returned by <<bfd_get_error>> are defined by the
241
        enumerated type <<bfd_error_type>>.
242
 
243
CODE_FRAGMENT
244
.
245
.typedef enum bfd_error
246
.{
247
.  bfd_error_no_error = 0,
248
.  bfd_error_system_call,
249
.  bfd_error_invalid_target,
250
.  bfd_error_wrong_format,
251
.  bfd_error_invalid_operation,
252
.  bfd_error_no_memory,
253
.  bfd_error_no_symbols,
254
.  bfd_error_no_armap,
255
.  bfd_error_no_more_archived_files,
256
.  bfd_error_malformed_archive,
257
.  bfd_error_file_not_recognized,
258
.  bfd_error_file_ambiguously_recognized,
259
.  bfd_error_no_contents,
260
.  bfd_error_nonrepresentable_section,
261
.  bfd_error_no_debug_section,
262
.  bfd_error_bad_value,
263
.  bfd_error_file_truncated,
264
.  bfd_error_file_too_big,
265
.  bfd_error_invalid_error_code
266
.} bfd_error_type;
267
.
268
*/
269
 
270
static bfd_error_type bfd_error = bfd_error_no_error;
271
 
272
CONST char *CONST bfd_errmsgs[] = {
273
                        N_("No error"),
274
                        N_("System call error"),
275
                        N_("Invalid bfd target"),
276
                        N_("File in wrong format"),
277
                        N_("Invalid operation"),
278
                        N_("Memory exhausted"),
279
                        N_("No symbols"),
280
                        N_("Archive has no index; run ranlib to add one"),
281
                        N_("No more archived files"),
282
                        N_("Malformed archive"),
283
                        N_("File format not recognized"),
284
                        N_("File format is ambiguous"),
285
                        N_("Section has no contents"),
286
                        N_("Nonrepresentable section on output"),
287
                        N_("Symbol needs debug section which does not exist"),
288
                        N_("Bad value"),
289
                        N_("File truncated"),
290
                        N_("File too big"),
291
                        N_("#<Invalid error code>")
292
                       };
293
 
294
/*
295
FUNCTION
296
        bfd_get_error
297
 
298
SYNOPSIS
299
        bfd_error_type bfd_get_error (void);
300
 
301
DESCRIPTION
302
        Return the current BFD error condition.
303
*/
304
 
305
bfd_error_type
306
bfd_get_error ()
307
{
308
  return bfd_error;
309
}
310
 
311
/*
312
FUNCTION
313
        bfd_set_error
314
 
315
SYNOPSIS
316
        void bfd_set_error (bfd_error_type error_tag);
317
 
318
DESCRIPTION
319
        Set the BFD error condition to be @var{error_tag}.
320
*/
321
 
322
void
323
bfd_set_error (error_tag)
324
     bfd_error_type error_tag;
325
{
326
  bfd_error = error_tag;
327
}
328
 
329
/*
330
FUNCTION
331
        bfd_errmsg
332
 
333
SYNOPSIS
334
        CONST char *bfd_errmsg (bfd_error_type error_tag);
335
 
336
DESCRIPTION
337
        Return a string describing the error @var{error_tag}, or
338
        the system error if @var{error_tag} is <<bfd_error_system_call>>.
339
*/
340
 
341
CONST char *
342
bfd_errmsg (error_tag)
343
     bfd_error_type error_tag;
344
{
345
#ifndef errno
346
  extern int errno;
347
#endif
348
  if (error_tag == bfd_error_system_call)
349
    return xstrerror (errno);
350
 
351
  if ((((int)error_tag <(int) bfd_error_no_error) ||
352
       ((int)error_tag > (int)bfd_error_invalid_error_code)))
353
    error_tag = bfd_error_invalid_error_code;/* sanity check */
354
 
355
  return _(bfd_errmsgs [(int)error_tag]);
356
}
357
 
358
/*
359
FUNCTION
360
        bfd_perror
361
 
362
SYNOPSIS
363
        void bfd_perror (CONST char *message);
364
 
365
DESCRIPTION
366
        Print to the standard error stream a string describing the
367
        last BFD error that occurred, or the last system error if
368
        the last BFD error was a system call failure.  If @var{message}
369
        is non-NULL and non-empty, the error string printed is preceded
370
        by @var{message}, a colon, and a space.  It is followed by a newline.
371
*/
372
 
373
void
374
bfd_perror (message)
375
     CONST char *message;
376
{
377
  if (bfd_get_error () == bfd_error_system_call)
378
    perror((char *)message);            /* must be system error then...  */
379
  else {
380
    if (message == NULL || *message == '\0')
381
      fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ()));
382
    else
383
      fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ()));
384
  }
385
}
386
 
387
/*
388
SUBSECTION
389
        BFD error handler
390
 
391
        Some BFD functions want to print messages describing the
392
        problem.  They call a BFD error handler function.  This
393
        function may be overriden by the program.
394
 
395
        The BFD error handler acts like printf.
396
 
397
CODE_FRAGMENT
398
.
399
.typedef void (*bfd_error_handler_type) PARAMS ((const char *, ...));
400
.
401
*/
402
 
403
/* The program name used when printing BFD error messages.  */
404
 
405
static const char *_bfd_error_program_name;
406
 
407
/* This is the default routine to handle BFD error messages.  */
408
 
409
#ifdef ANSI_PROTOTYPES
410
 
411
static void _bfd_default_error_handler PARAMS ((const char *s, ...));
412
 
413
static void
414
_bfd_default_error_handler (const char *s, ...)
415
{
416
  va_list p;
417
 
418
  if (_bfd_error_program_name != NULL)
419
    fprintf (stderr, "%s: ", _bfd_error_program_name);
420
  else
421
    fprintf (stderr, "BFD: ");
422
 
423
  va_start (p, s);
424
 
425
  vfprintf (stderr, s, p);
426
 
427
  va_end (p);
428
 
429
  fprintf (stderr, "\n");
430
}
431
 
432
#else /* ! defined (ANSI_PROTOTYPES) */
433
 
434
static void _bfd_default_error_handler ();
435
 
436
static void
437
_bfd_default_error_handler (va_alist)
438
     va_dcl
439
{
440
  va_list p;
441
  const char *s;
442
 
443
  if (_bfd_error_program_name != NULL)
444
    fprintf (stderr, "%s: ", _bfd_error_program_name);
445
  else
446
    fprintf (stderr, "BFD: ");
447
 
448
  va_start (p);
449
 
450
  s = va_arg (p, const char *);
451
  vfprintf (stderr, s, p);
452
 
453
  va_end (p);
454
 
455
  fprintf (stderr, "\n");
456
}
457
 
458
#endif /* ! defined (ANSI_PROTOTYPES) */
459
 
460
/* This is a function pointer to the routine which should handle BFD
461
   error messages.  It is called when a BFD routine encounters an
462
   error for which it wants to print a message.  Going through a
463
   function pointer permits a program linked against BFD to intercept
464
   the messages and deal with them itself.  */
465
 
466
bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler;
467
 
468
/*
469
FUNCTION
470
        bfd_set_error_handler
471
 
472
SYNOPSIS
473
        bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type);
474
 
475
DESCRIPTION
476
        Set the BFD error handler function.  Returns the previous
477
        function.
478
*/
479
 
480
bfd_error_handler_type
481
bfd_set_error_handler (pnew)
482
     bfd_error_handler_type pnew;
483
{
484
  bfd_error_handler_type pold;
485
 
486
  pold = _bfd_error_handler;
487
  _bfd_error_handler = pnew;
488
  return pold;
489
}
490
 
491
/*
492
FUNCTION
493
        bfd_set_error_program_name
494
 
495
SYNOPSIS
496
        void bfd_set_error_program_name (const char *);
497
 
498
DESCRIPTION
499
        Set the program name to use when printing a BFD error.  This
500
        is printed before the error message followed by a colon and
501
        space.  The string must not be changed after it is passed to
502
        this function.
503
*/
504
 
505
void
506
bfd_set_error_program_name (name)
507
     const char *name;
508
{
509
  _bfd_error_program_name = name;
510
}
511
 
512
/*
513
FUNCTION
514
        bfd_get_error_handler
515
 
516
SYNOPSIS
517
        bfd_error_handler_type bfd_get_error_handler (void);
518
 
519
DESCRIPTION
520
        Return the BFD error handler function.
521
*/
522
 
523
bfd_error_handler_type
524
bfd_get_error_handler ()
525
{
526
  return _bfd_error_handler;
527
}
528
 
529
/*
530
SECTION
531
        Symbols
532
*/
533
 
534
/*
535
FUNCTION
536
        bfd_get_reloc_upper_bound
537
 
538
SYNOPSIS
539
        long bfd_get_reloc_upper_bound(bfd *abfd, asection *sect);
540
 
541
DESCRIPTION
542
        Return the number of bytes required to store the
543
        relocation information associated with section @var{sect}
544
        attached to bfd @var{abfd}.  If an error occurs, return -1.
545
 
546
*/
547
 
548
long
549
bfd_get_reloc_upper_bound (abfd, asect)
550
     bfd *abfd;
551
     sec_ptr asect;
552
{
553
  if (abfd->format != bfd_object) {
554
    bfd_set_error (bfd_error_invalid_operation);
555
    return -1;
556
  }
557
 
558
  return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
559
}
560
 
561
/*
562
FUNCTION
563
        bfd_canonicalize_reloc
564
 
565
SYNOPSIS
566
        long bfd_canonicalize_reloc
567
                (bfd *abfd,
568
                asection *sec,
569
                arelent **loc,
570
                asymbol **syms);
571
 
572
DESCRIPTION
573
        Call the back end associated with the open BFD
574
        @var{abfd} and translate the external form of the relocation
575
        information attached to @var{sec} into the internal canonical
576
        form.  Place the table into memory at @var{loc}, which has
577
        been preallocated, usually by a call to
578
        <<bfd_get_reloc_upper_bound>>.  Returns the number of relocs, or
579
        -1 on error.
580
 
581
        The @var{syms} table is also needed for horrible internal magic
582
        reasons.
583
 
584
*/
585
long
586
bfd_canonicalize_reloc (abfd, asect, location, symbols)
587
     bfd *abfd;
588
     sec_ptr asect;
589
     arelent **location;
590
     asymbol **symbols;
591
{
592
  if (abfd->format != bfd_object) {
593
    bfd_set_error (bfd_error_invalid_operation);
594
    return -1;
595
  }
596
  return BFD_SEND (abfd, _bfd_canonicalize_reloc,
597
                   (abfd, asect, location, symbols));
598
}
599
 
600
/*
601
FUNCTION
602
        bfd_set_reloc
603
 
604
SYNOPSIS
605
        void bfd_set_reloc
606
          (bfd *abfd, asection *sec, arelent **rel, unsigned int count)
607
 
608
DESCRIPTION
609
        Set the relocation pointer and count within
610
        section @var{sec} to the values @var{rel} and @var{count}.
611
        The argument @var{abfd} is ignored.
612
 
613
*/
614
 
615
void
616
bfd_set_reloc (ignore_abfd, asect, location, count)
617
     bfd *ignore_abfd ATTRIBUTE_UNUSED;
618
     sec_ptr asect;
619
     arelent **location;
620
     unsigned int count;
621
{
622
  asect->orelocation = location;
623
  asect->reloc_count = count;
624
}
625
 
626
/*
627
FUNCTION
628
        bfd_set_file_flags
629
 
630
SYNOPSIS
631
        boolean bfd_set_file_flags(bfd *abfd, flagword flags);
632
 
633
DESCRIPTION
634
        Set the flag word in the BFD @var{abfd} to the value @var{flags}.
635
 
636
        Possible errors are:
637
        o <<bfd_error_wrong_format>> - The target bfd was not of object format.
638
        o <<bfd_error_invalid_operation>> - The target bfd was open for reading.
639
        o <<bfd_error_invalid_operation>> -
640
        The flag word contained a bit which was not applicable to the
641
        type of file.  E.g., an attempt was made to set the <<D_PAGED>> bit
642
        on a BFD format which does not support demand paging.
643
 
644
*/
645
 
646
boolean
647
bfd_set_file_flags (abfd, flags)
648
     bfd *abfd;
649
     flagword flags;
650
{
651
  if (abfd->format != bfd_object) {
652
    bfd_set_error (bfd_error_wrong_format);
653
    return false;
654
  }
655
 
656
  if (bfd_read_p (abfd)) {
657
    bfd_set_error (bfd_error_invalid_operation);
658
    return false;
659
  }
660
 
661
  bfd_get_file_flags (abfd) = flags;
662
  if ((flags & bfd_applicable_file_flags (abfd)) != flags) {
663
    bfd_set_error (bfd_error_invalid_operation);
664
    return false;
665
  }
666
 
667
return true;
668
}
669
 
670
void
671
bfd_assert (file, line)
672
     const char *file;
673
     int line;
674
{
675
  (*_bfd_error_handler) (_("bfd assertion fail %s:%d"), file, line);
676
}
677
 
678
/* A more or less friendly abort message.  In libbfd.h abort is
679
   defined to call this function.  */
680
 
681
#ifndef EXIT_FAILURE
682
#define EXIT_FAILURE 1
683
#endif
684
 
685
void
686
_bfd_abort (file, line, fn)
687
     const char *file;
688
     int line;
689
     const char *fn;
690
{
691
  if (fn != NULL)
692
    (*_bfd_error_handler)
693
      (_("BFD internal error, aborting at %s line %d in %s\n"),
694
       file, line, fn);
695
  else
696
    (*_bfd_error_handler)
697
      (_("BFD internal error, aborting at %s line %d\n"),
698
       file, line);
699
  (*_bfd_error_handler) (_("Please report this bug.\n"));
700
  xexit (EXIT_FAILURE);
701
}
702
 
703
/*
704
FUNCTION
705
        bfd_get_arch_size
706
 
707
SYNOPSIS
708
        int bfd_get_arch_size (bfd *abfd);
709
 
710
DESCRIPTION
711
        Returns the architecture address size, in bits, as determined
712
        by the object file's format.  For ELF, this information is
713
        included in the header.
714
 
715
RETURNS
716
        Returns the arch size in bits if known, <<-1>> otherwise.
717
*/
718
 
719
int
720
bfd_get_arch_size (abfd)
721
     bfd *abfd;
722
{
723
  if (abfd->xvec->flavour == bfd_target_elf_flavour)
724
    return (get_elf_backend_data (abfd))->s->arch_size;
725
 
726
  bfd_set_error (bfd_error_wrong_format);
727
  return -1;
728
}
729
 
730
/*
731
FUNCTION
732
        bfd_get_sign_extend_vma
733
 
734
SYNOPSIS
735
        int bfd_get_sign_extend_vma (bfd *abfd);
736
 
737
DESCRIPTION
738
        Indicates if the target architecture "naturally" sign extends
739
        an address.  Some architectures implicitly sign extend address
740
        values when they are converted to types larger than the size
741
        of an address.  For instance, bfd_get_start_address() will
742
        return an address sign extended to fill a bfd_vma when this is
743
        the case.
744
 
745
RETURNS
746
        Returns <<1>> if the target architecture is known to sign
747
        extend addresses, <<0>> if the target architecture is known to
748
        not sign extend addresses, and <<-1>> otherwise.
749
*/
750
 
751
int
752
bfd_get_sign_extend_vma (abfd)
753
     bfd *abfd;
754
{
755
  char *name;
756
 
757
  if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
758
    return (get_elf_backend_data (abfd)->sign_extend_vma);
759
 
760
  name = bfd_get_target (abfd);
761
 
762
  /* Return a proper value for DJGPP COFF (an x86 COFF variant).
763
     This function is required for DWARF2 support, but there is
764
     no place to store this information in the COFF back end.
765
     Should enough other COFF targets add support for DWARF2,
766
     a place will have to be found.  Until then, this hack will do.  */
767
  if (strncmp (name, "coff-go32", sizeof ("coff-go32") - 1) == 0)
768
    return 1;
769
 
770
  bfd_set_error (bfd_error_wrong_format);
771
  return -1;
772
}
773
 
774
/*
775
FUNCTION
776
        bfd_set_start_address
777
 
778
SYNOPSIS
779
        boolean bfd_set_start_address(bfd *abfd, bfd_vma vma);
780
 
781
DESCRIPTION
782
        Make @var{vma} the entry point of output BFD @var{abfd}.
783
 
784
RETURNS
785
        Returns <<true>> on success, <<false>> otherwise.
786
*/
787
 
788
boolean
789
bfd_set_start_address(abfd, vma)
790
bfd *abfd;
791
bfd_vma vma;
792
{
793
  abfd->start_address = vma;
794
  return true;
795
}
796
 
797
/*
798
FUNCTION
799
        bfd_get_mtime
800
 
801
SYNOPSIS
802
        long bfd_get_mtime(bfd *abfd);
803
 
804
DESCRIPTION
805
        Return the file modification time (as read from the file system, or
806
        from the archive header for archive members).
807
 
808
*/
809
 
810
long
811
bfd_get_mtime (abfd)
812
     bfd *abfd;
813
{
814
  FILE *fp;
815
  struct stat buf;
816
 
817
  if (abfd->mtime_set)
818
    return abfd->mtime;
819
 
820
  fp = bfd_cache_lookup (abfd);
821
  if (0 != fstat (fileno (fp), &buf))
822
    return 0;
823
 
824
  abfd->mtime = buf.st_mtime;           /* Save value in case anyone wants it */
825
  return buf.st_mtime;
826
}
827
 
828
/*
829
FUNCTION
830
        bfd_get_size
831
 
832
SYNOPSIS
833
        long bfd_get_size(bfd *abfd);
834
 
835
DESCRIPTION
836
        Return the file size (as read from file system) for the file
837
        associated with BFD @var{abfd}.
838
 
839
        The initial motivation for, and use of, this routine is not
840
        so we can get the exact size of the object the BFD applies to, since
841
        that might not be generally possible (archive members for example).
842
        It would be ideal if someone could eventually modify
843
        it so that such results were guaranteed.
844
 
845
        Instead, we want to ask questions like "is this NNN byte sized
846
        object I'm about to try read from file offset YYY reasonable?"
847
        As as example of where we might do this, some object formats
848
        use string tables for which the first <<sizeof (long)>> bytes of the
849
        table contain the size of the table itself, including the size bytes.
850
        If an application tries to read what it thinks is one of these
851
        string tables, without some way to validate the size, and for
852
        some reason the size is wrong (byte swapping error, wrong location
853
        for the string table, etc.), the only clue is likely to be a read
854
        error when it tries to read the table, or a "virtual memory
855
        exhausted" error when it tries to allocate 15 bazillon bytes
856
        of space for the 15 bazillon byte table it is about to read.
857
        This function at least allows us to answer the quesion, "is the
858
        size reasonable?".
859
*/
860
 
861
long
862
bfd_get_size (abfd)
863
     bfd *abfd;
864
{
865
  FILE *fp;
866
  struct stat buf;
867
 
868
  if ((abfd->flags & BFD_IN_MEMORY) != 0)
869
    return ((struct bfd_in_memory *) abfd->iostream)->size;
870
 
871
  fp = bfd_cache_lookup (abfd);
872
  if (0 != fstat (fileno (fp), &buf))
873
    return 0;
874
 
875
  return buf.st_size;
876
}
877
 
878
/*
879
FUNCTION
880
        bfd_get_gp_size
881
 
882
SYNOPSIS
883
        int bfd_get_gp_size(bfd *abfd);
884
 
885
DESCRIPTION
886
        Return the maximum size of objects to be optimized using the GP
887
        register under MIPS ECOFF.  This is typically set by the <<-G>>
888
        argument to the compiler, assembler or linker.
889
*/
890
 
891
int
892
bfd_get_gp_size (abfd)
893
     bfd *abfd;
894
{
895
  if (abfd->format == bfd_object)
896
    {
897
      if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
898
        return ecoff_data (abfd)->gp_size;
899
      else if (abfd->xvec->flavour == bfd_target_elf_flavour)
900
        return elf_gp_size (abfd);
901
    }
902
  return 0;
903
}
904
 
905
/*
906
FUNCTION
907
        bfd_set_gp_size
908
 
909
SYNOPSIS
910
        void bfd_set_gp_size(bfd *abfd, int i);
911
 
912
DESCRIPTION
913
        Set the maximum size of objects to be optimized using the GP
914
        register under ECOFF or MIPS ELF.  This is typically set by
915
        the <<-G>> argument to the compiler, assembler or linker.
916
*/
917
 
918
void
919
bfd_set_gp_size (abfd, i)
920
     bfd *abfd;
921
     int i;
922
{
923
  /* Don't try to set GP size on an archive or core file! */
924
  if (abfd->format != bfd_object)
925
    return;
926
  if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
927
    ecoff_data (abfd)->gp_size = i;
928
  else if (abfd->xvec->flavour == bfd_target_elf_flavour)
929
    elf_gp_size (abfd) = i;
930
}
931
 
932
/* Get the GP value.  This is an internal function used by some of the
933
   relocation special_function routines on targets which support a GP
934
   register.  */
935
 
936
bfd_vma
937
_bfd_get_gp_value (abfd)
938
     bfd *abfd;
939
{
940
  if (abfd->format == bfd_object)
941
    {
942
      if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
943
        return ecoff_data (abfd)->gp;
944
      else if (abfd->xvec->flavour == bfd_target_elf_flavour)
945
        return elf_gp (abfd);
946
    }
947
  return 0;
948
}
949
 
950
/* Set the GP value.  */
951
 
952
void
953
_bfd_set_gp_value (abfd, v)
954
     bfd *abfd;
955
     bfd_vma v;
956
{
957
  if (abfd->format != bfd_object)
958
    return;
959
  if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
960
    ecoff_data (abfd)->gp = v;
961
  else if (abfd->xvec->flavour == bfd_target_elf_flavour)
962
    elf_gp (abfd) = v;
963
}
964
 
965
/*
966
FUNCTION
967
        bfd_scan_vma
968
 
969
SYNOPSIS
970
        bfd_vma bfd_scan_vma(CONST char *string, CONST char **end, int base);
971
 
972
DESCRIPTION
973
        Convert, like <<strtoul>>, a numerical expression
974
        @var{string} into a <<bfd_vma>> integer, and return that integer.
975
        (Though without as many bells and whistles as <<strtoul>>.)
976
        The expression is assumed to be unsigned (i.e., positive).
977
        If given a @var{base}, it is used as the base for conversion.
978
        A base of 0 causes the function to interpret the string
979
        in hex if a leading "0x" or "0X" is found, otherwise
980
        in octal if a leading zero is found, otherwise in decimal.
981
 
982
        Overflow is not detected.
983
*/
984
 
985
bfd_vma
986
bfd_scan_vma (string, end, base)
987
     CONST char *string;
988
     CONST char **end;
989
     int base;
990
{
991
  bfd_vma value;
992
  int digit;
993
 
994
  /* Let the host do it if possible.  */
995
  if (sizeof (bfd_vma) <= sizeof (unsigned long))
996
    return (bfd_vma) strtoul (string, (char **) end, base);
997
 
998
  /* A negative base makes no sense, and we only need to go as high as hex.  */
999
  if ((base < 0) || (base > 16))
1000
    return (bfd_vma) 0;
1001
 
1002
  if (base == 0)
1003
    {
1004
      if (string[0] == '0')
1005
        {
1006
          if ((string[1] == 'x') || (string[1] == 'X'))
1007
            base = 16;
1008
          /* XXX should we also allow "0b" or "0B" to set base to 2? */
1009
          else
1010
            base = 8;
1011
        }
1012
      else
1013
        base = 10;
1014
    }
1015
  if ((base == 16) &&
1016
      (string[0] == '0') && ((string[1] == 'x') || (string[1] == 'X')))
1017
    string += 2;
1018
  /* XXX should we also skip over "0b" or "0B" if base is 2? */
1019
 
1020
/* Speed could be improved with a table like hex_value[] in gas.  */
1021
#define HEX_VALUE(c) \
1022
  (isxdigit ((unsigned char) c)                                 \
1023
   ? (isdigit ((unsigned char) c)                               \
1024
      ? (c - '0')                                               \
1025
      : (10 + c - (islower ((unsigned char) c) ? 'a' : 'A')))   \
1026
   : 42)
1027
 
1028
  for (value = 0; (digit = HEX_VALUE(*string)) < base; string++)
1029
    {
1030
      value = value * base + digit;
1031
    }
1032
 
1033
  if (end)
1034
    *end = string;
1035
 
1036
  return value;
1037
}
1038
 
1039
/*
1040
FUNCTION
1041
        bfd_copy_private_bfd_data
1042
 
1043
SYNOPSIS
1044
        boolean bfd_copy_private_bfd_data(bfd *ibfd, bfd *obfd);
1045
 
1046
DESCRIPTION
1047
        Copy private BFD information from the BFD @var{ibfd} to the
1048
        the BFD @var{obfd}.  Return <<true>> on success, <<false>> on error.
1049
        Possible error returns are:
1050
 
1051
        o <<bfd_error_no_memory>> -
1052
        Not enough memory exists to create private data for @var{obfd}.
1053
 
1054
.#define bfd_copy_private_bfd_data(ibfd, obfd) \
1055
.     BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
1056
.               (ibfd, obfd))
1057
 
1058
*/
1059
 
1060
/*
1061
FUNCTION
1062
        bfd_merge_private_bfd_data
1063
 
1064
SYNOPSIS
1065
        boolean bfd_merge_private_bfd_data(bfd *ibfd, bfd *obfd);
1066
 
1067
DESCRIPTION
1068
        Merge private BFD information from the BFD @var{ibfd} to the
1069
        the output file BFD @var{obfd} when linking.  Return <<true>>
1070
        on success, <<false>> on error.  Possible error returns are:
1071
 
1072
        o <<bfd_error_no_memory>> -
1073
        Not enough memory exists to create private data for @var{obfd}.
1074
 
1075
.#define bfd_merge_private_bfd_data(ibfd, obfd) \
1076
.     BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
1077
.               (ibfd, obfd))
1078
 
1079
*/
1080
 
1081
/*
1082
FUNCTION
1083
        bfd_set_private_flags
1084
 
1085
SYNOPSIS
1086
        boolean bfd_set_private_flags(bfd *abfd, flagword flags);
1087
 
1088
DESCRIPTION
1089
        Set private BFD flag information in the BFD @var{abfd}.
1090
        Return <<true>> on success, <<false>> on error.  Possible error
1091
        returns are:
1092
 
1093
        o <<bfd_error_no_memory>> -
1094
        Not enough memory exists to create private data for @var{obfd}.
1095
 
1096
.#define bfd_set_private_flags(abfd, flags) \
1097
.     BFD_SEND (abfd, _bfd_set_private_flags, \
1098
.               (abfd, flags))
1099
 
1100
*/
1101
 
1102
/*
1103
FUNCTION
1104
        stuff
1105
 
1106
DESCRIPTION
1107
        Stuff which should be documented:
1108
 
1109
.#define bfd_sizeof_headers(abfd, reloc) \
1110
.     BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc))
1111
.
1112
.#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
1113
.     BFD_SEND (abfd, _bfd_find_nearest_line,  (abfd, sec, syms, off, file, func, line))
1114
.
1115
.       {* Do these three do anything useful at all, for any back end?  *}
1116
.#define bfd_debug_info_start(abfd) \
1117
.        BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
1118
.
1119
.#define bfd_debug_info_end(abfd) \
1120
.        BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
1121
.
1122
.#define bfd_debug_info_accumulate(abfd, section) \
1123
.        BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
1124
.
1125
.
1126
.#define bfd_stat_arch_elt(abfd, stat) \
1127
.        BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
1128
.
1129
.#define bfd_update_armap_timestamp(abfd) \
1130
.        BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd))
1131
.
1132
.#define bfd_set_arch_mach(abfd, arch, mach)\
1133
.        BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
1134
.
1135
.#define bfd_relax_section(abfd, section, link_info, again) \
1136
.       BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again))
1137
.
1138
.#define bfd_gc_sections(abfd, link_info) \
1139
.       BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
1140
.
1141
.#define bfd_merge_sections(abfd, link_info) \
1142
.       BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
1143
.
1144
.#define bfd_link_hash_table_create(abfd) \
1145
.       BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
1146
.
1147
.#define bfd_link_add_symbols(abfd, info) \
1148
.       BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
1149
.
1150
.#define bfd_final_link(abfd, info) \
1151
.       BFD_SEND (abfd, _bfd_final_link, (abfd, info))
1152
.
1153
.#define bfd_free_cached_info(abfd) \
1154
.       BFD_SEND (abfd, _bfd_free_cached_info, (abfd))
1155
.
1156
.#define bfd_get_dynamic_symtab_upper_bound(abfd) \
1157
.       BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd))
1158
.
1159
.#define bfd_print_private_bfd_data(abfd, file)\
1160
.       BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file))
1161
.
1162
.#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \
1163
.       BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols))
1164
.
1165
.#define bfd_get_dynamic_reloc_upper_bound(abfd) \
1166
.       BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd))
1167
.
1168
.#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \
1169
.       BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms))
1170
.
1171
.extern bfd_byte *bfd_get_relocated_section_contents
1172
.       PARAMS ((bfd *, struct bfd_link_info *,
1173
.                 struct bfd_link_order *, bfd_byte *,
1174
.                 boolean, asymbol **));
1175
.
1176
 
1177
*/
1178
 
1179
bfd_byte *
1180
bfd_get_relocated_section_contents (abfd, link_info, link_order, data,
1181
                                    relocateable, symbols)
1182
     bfd *abfd;
1183
     struct bfd_link_info *link_info;
1184
     struct bfd_link_order *link_order;
1185
     bfd_byte *data;
1186
     boolean relocateable;
1187
     asymbol **symbols;
1188
{
1189
  bfd *abfd2;
1190
  bfd_byte *(*fn) PARAMS ((bfd *, struct bfd_link_info *,
1191
                           struct bfd_link_order *, bfd_byte *, boolean,
1192
                           asymbol **));
1193
 
1194
  if (link_order->type == bfd_indirect_link_order)
1195
    {
1196
      abfd2 = link_order->u.indirect.section->owner;
1197
      if (abfd2 == 0)
1198
        abfd2 = abfd;
1199
    }
1200
  else
1201
    abfd2 = abfd;
1202
  fn = abfd2->xvec->_bfd_get_relocated_section_contents;
1203
 
1204
  return (*fn) (abfd, link_info, link_order, data, relocateable, symbols);
1205
}
1206
 
1207
/* Record information about an ELF program header.  */
1208
 
1209
boolean
1210
bfd_record_phdr (abfd, type, flags_valid, flags, at_valid, at,
1211
                 includes_filehdr, includes_phdrs, count, secs)
1212
     bfd *abfd;
1213
     unsigned long type;
1214
     boolean flags_valid;
1215
     flagword flags;
1216
     boolean at_valid;
1217
     bfd_vma at;
1218
     boolean includes_filehdr;
1219
     boolean includes_phdrs;
1220
     unsigned int count;
1221
     asection **secs;
1222
{
1223
  struct elf_segment_map *m, **pm;
1224
 
1225
  if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
1226
    return true;
1227
 
1228
  m = ((struct elf_segment_map *)
1229
       bfd_alloc (abfd,
1230
                  (sizeof (struct elf_segment_map)
1231
                   + ((size_t) count - 1) * sizeof (asection *))));
1232
  if (m == NULL)
1233
    return false;
1234
 
1235
  m->next = NULL;
1236
  m->p_type = type;
1237
  m->p_flags = flags;
1238
  m->p_paddr = at;
1239
  m->p_flags_valid = flags_valid;
1240
  m->p_paddr_valid = at_valid;
1241
  m->includes_filehdr = includes_filehdr;
1242
  m->includes_phdrs = includes_phdrs;
1243
  m->count = count;
1244
  if (count > 0)
1245
    memcpy (m->sections, secs, count * sizeof (asection *));
1246
 
1247
  for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next)
1248
    ;
1249
  *pm = m;
1250
 
1251
  return true;
1252
}

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