Make set_solib_svr4_fetch_link_map_offsets() work as intended.
[deliverable/binutils-gdb.git] / bfd / bfd.c
CommitLineData
252b5132 1/* Generic BFD library interface and support routines.
7898deda
NC
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001
252b5132
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4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
6
7This file is part of BFD, the Binary File Descriptor library.
8
9This program is free software; you can redistribute it and/or modify
10it under the terms of the GNU General Public License as published by
11the Free Software Foundation; either version 2 of the License, or
12(at your option) any later version.
13
14This program is distributed in the hope that it will be useful,
15but WITHOUT ANY WARRANTY; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License
20along with this program; if not, write to the Free Software
21Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23/*
24SECTION
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
35CODE_FRAGMENT
36.
aebad5fe 37.struct _bfd
252b5132
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38.{
39. {* The filename the application opened the BFD with. *}
55ab10f0 40. const char *filename;
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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.
dc810e39 73. ufile_ptr where;
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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.
aebad5fe 86. long mtime;
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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.
aebad5fe 105. flagword flags;
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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.
dc810e39 111. ufile_ptr origin;
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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.
aebad5fe 123. {* Stuff only useful for object files:
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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) *}
aebad5fe 131. struct symbol_cache_entry **outsymbols;
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132.
133. {* Pointer to structure which contains architecture information*}
134. const struct bfd_arch_info *arch_info;
135.
136. {* Stuff only useful for archives:*}
aebad5fe 137. PTR arelt_data;
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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. *}
aebad5fe 141. boolean has_armap;
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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.
aebad5fe 152. union
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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;
aebad5fe 184.
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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"
3882b010 206#include "safe-ctype.h"
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207#include "bfdlink.h"
208#include "libbfd.h"
209#include "coff/internal.h"
210#include "coff/sym.h"
211#include "libcoff.h"
212#include "libecoff.h"
213#undef obj_symbols
214#include "elf-bfd.h"
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215\f
216/* provide storage for subsystem, stack and heap data which may have been
217 passed in on the command line. Ld puts this data into a bfd_link_info
218 struct which ultimately gets passed in to the bfd. When it arrives, copy
219 it to the following struct so that the data will be available in coffcode.h
220 where it is needed. The typedef's used are defined in bfd.h */
252b5132
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221\f
222/*
223SECTION
224 Error reporting
225
226 Most BFD functions return nonzero on success (check their
227 individual documentation for precise semantics). On an error,
228 they call <<bfd_set_error>> to set an error condition that callers
229 can check by calling <<bfd_get_error>>.
230 If that returns <<bfd_error_system_call>>, then check
231 <<errno>>.
232
233 The easiest way to report a BFD error to the user is to
234 use <<bfd_perror>>.
235
236SUBSECTION
237 Type <<bfd_error_type>>
238
239 The values returned by <<bfd_get_error>> are defined by the
240 enumerated type <<bfd_error_type>>.
241
242CODE_FRAGMENT
243.
244.typedef enum bfd_error
245.{
246. bfd_error_no_error = 0,
247. bfd_error_system_call,
248. bfd_error_invalid_target,
249. bfd_error_wrong_format,
3619ad04 250. bfd_error_wrong_object_format,
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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
270static bfd_error_type bfd_error = bfd_error_no_error;
271
55ab10f0
NC
272const char *const bfd_errmsgs[] =
273{
274 N_("No error"),
275 N_("System call error"),
276 N_("Invalid bfd target"),
277 N_("File in wrong format"),
3619ad04 278 N_("Archive object file in wrong format"),
55ab10f0
NC
279 N_("Invalid operation"),
280 N_("Memory exhausted"),
281 N_("No symbols"),
282 N_("Archive has no index; run ranlib to add one"),
283 N_("No more archived files"),
284 N_("Malformed archive"),
285 N_("File format not recognized"),
286 N_("File format is ambiguous"),
287 N_("Section has no contents"),
288 N_("Nonrepresentable section on output"),
289 N_("Symbol needs debug section which does not exist"),
290 N_("Bad value"),
291 N_("File truncated"),
292 N_("File too big"),
293 N_("#<Invalid error code>")
294};
252b5132
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295
296/*
297FUNCTION
298 bfd_get_error
299
300SYNOPSIS
301 bfd_error_type bfd_get_error (void);
302
303DESCRIPTION
304 Return the current BFD error condition.
305*/
306
307bfd_error_type
308bfd_get_error ()
309{
310 return bfd_error;
311}
312
313/*
314FUNCTION
315 bfd_set_error
316
317SYNOPSIS
318 void bfd_set_error (bfd_error_type error_tag);
319
320DESCRIPTION
321 Set the BFD error condition to be @var{error_tag}.
322*/
323
324void
325bfd_set_error (error_tag)
326 bfd_error_type error_tag;
327{
328 bfd_error = error_tag;
329}
330
331/*
332FUNCTION
333 bfd_errmsg
334
335SYNOPSIS
55ab10f0 336 const char *bfd_errmsg (bfd_error_type error_tag);
252b5132
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337
338DESCRIPTION
339 Return a string describing the error @var{error_tag}, or
340 the system error if @var{error_tag} is <<bfd_error_system_call>>.
341*/
342
55ab10f0 343const char *
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344bfd_errmsg (error_tag)
345 bfd_error_type error_tag;
346{
347#ifndef errno
348 extern int errno;
349#endif
350 if (error_tag == bfd_error_system_call)
351 return xstrerror (errno);
352
55ab10f0
NC
353 if ((((int) error_tag < (int) bfd_error_no_error) ||
354 ((int) error_tag > (int) bfd_error_invalid_error_code)))
252b5132
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355 error_tag = bfd_error_invalid_error_code;/* sanity check */
356
357 return _(bfd_errmsgs [(int)error_tag]);
358}
359
360/*
361FUNCTION
362 bfd_perror
363
364SYNOPSIS
55ab10f0 365 void bfd_perror (const char *message);
252b5132
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366
367DESCRIPTION
368 Print to the standard error stream a string describing the
369 last BFD error that occurred, or the last system error if
370 the last BFD error was a system call failure. If @var{message}
371 is non-NULL and non-empty, the error string printed is preceded
372 by @var{message}, a colon, and a space. It is followed by a newline.
373*/
374
375void
376bfd_perror (message)
55ab10f0 377 const char *message;
252b5132
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378{
379 if (bfd_get_error () == bfd_error_system_call)
55ab10f0
NC
380 /* Must be a system error then. */
381 perror ((char *)message);
382 else
383 {
384 if (message == NULL || *message == '\0')
385 fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ()));
386 else
387 fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ()));
388 }
252b5132
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389}
390
391/*
392SUBSECTION
393 BFD error handler
394
395 Some BFD functions want to print messages describing the
396 problem. They call a BFD error handler function. This
397 function may be overriden by the program.
398
399 The BFD error handler acts like printf.
400
401CODE_FRAGMENT
402.
403.typedef void (*bfd_error_handler_type) PARAMS ((const char *, ...));
404.
405*/
406
407/* The program name used when printing BFD error messages. */
408
409static const char *_bfd_error_program_name;
410
411/* This is the default routine to handle BFD error messages. */
412
413#ifdef ANSI_PROTOTYPES
414
415static void _bfd_default_error_handler PARAMS ((const char *s, ...));
416
417static void
418_bfd_default_error_handler (const char *s, ...)
419{
420 va_list p;
421
422 if (_bfd_error_program_name != NULL)
423 fprintf (stderr, "%s: ", _bfd_error_program_name);
424 else
425 fprintf (stderr, "BFD: ");
426
427 va_start (p, s);
428
429 vfprintf (stderr, s, p);
430
431 va_end (p);
432
433 fprintf (stderr, "\n");
434}
435
436#else /* ! defined (ANSI_PROTOTYPES) */
437
438static void _bfd_default_error_handler ();
439
440static void
441_bfd_default_error_handler (va_alist)
442 va_dcl
443{
444 va_list p;
445 const char *s;
446
447 if (_bfd_error_program_name != NULL)
448 fprintf (stderr, "%s: ", _bfd_error_program_name);
449 else
450 fprintf (stderr, "BFD: ");
451
452 va_start (p);
453
454 s = va_arg (p, const char *);
455 vfprintf (stderr, s, p);
456
457 va_end (p);
458
459 fprintf (stderr, "\n");
460}
461
462#endif /* ! defined (ANSI_PROTOTYPES) */
463
464/* This is a function pointer to the routine which should handle BFD
465 error messages. It is called when a BFD routine encounters an
466 error for which it wants to print a message. Going through a
467 function pointer permits a program linked against BFD to intercept
468 the messages and deal with them itself. */
469
470bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler;
471
472/*
473FUNCTION
474 bfd_set_error_handler
475
476SYNOPSIS
477 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type);
478
479DESCRIPTION
480 Set the BFD error handler function. Returns the previous
481 function.
482*/
483
484bfd_error_handler_type
485bfd_set_error_handler (pnew)
486 bfd_error_handler_type pnew;
487{
488 bfd_error_handler_type pold;
489
490 pold = _bfd_error_handler;
491 _bfd_error_handler = pnew;
492 return pold;
493}
494
495/*
496FUNCTION
497 bfd_set_error_program_name
498
499SYNOPSIS
500 void bfd_set_error_program_name (const char *);
501
502DESCRIPTION
503 Set the program name to use when printing a BFD error. This
504 is printed before the error message followed by a colon and
505 space. The string must not be changed after it is passed to
506 this function.
507*/
508
509void
510bfd_set_error_program_name (name)
511 const char *name;
512{
513 _bfd_error_program_name = name;
514}
515
252b5132
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516/*
517FUNCTION
518 bfd_get_error_handler
519
520SYNOPSIS
521 bfd_error_handler_type bfd_get_error_handler (void);
522
523DESCRIPTION
524 Return the BFD error handler function.
525*/
526
527bfd_error_handler_type
528bfd_get_error_handler ()
529{
530 return _bfd_error_handler;
531}
532\f
533/*
534SECTION
535 Symbols
536*/
537
538/*
539FUNCTION
540 bfd_get_reloc_upper_bound
541
542SYNOPSIS
543 long bfd_get_reloc_upper_bound(bfd *abfd, asection *sect);
544
545DESCRIPTION
546 Return the number of bytes required to store the
547 relocation information associated with section @var{sect}
548 attached to bfd @var{abfd}. If an error occurs, return -1.
549
550*/
551
252b5132
RH
552long
553bfd_get_reloc_upper_bound (abfd, asect)
554 bfd *abfd;
555 sec_ptr asect;
556{
55ab10f0
NC
557 if (abfd->format != bfd_object)
558 {
559 bfd_set_error (bfd_error_invalid_operation);
560 return -1;
561 }
252b5132
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562
563 return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
564}
565
566/*
567FUNCTION
568 bfd_canonicalize_reloc
569
570SYNOPSIS
571 long bfd_canonicalize_reloc
572 (bfd *abfd,
573 asection *sec,
574 arelent **loc,
575 asymbol **syms);
576
577DESCRIPTION
578 Call the back end associated with the open BFD
579 @var{abfd} and translate the external form of the relocation
580 information attached to @var{sec} into the internal canonical
581 form. Place the table into memory at @var{loc}, which has
582 been preallocated, usually by a call to
583 <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or
584 -1 on error.
585
586 The @var{syms} table is also needed for horrible internal magic
587 reasons.
588
252b5132
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589*/
590long
591bfd_canonicalize_reloc (abfd, asect, location, symbols)
592 bfd *abfd;
593 sec_ptr asect;
594 arelent **location;
595 asymbol **symbols;
596{
55ab10f0
NC
597 if (abfd->format != bfd_object)
598 {
599 bfd_set_error (bfd_error_invalid_operation);
600 return -1;
601 }
602
252b5132
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603 return BFD_SEND (abfd, _bfd_canonicalize_reloc,
604 (abfd, asect, location, symbols));
605}
606
607/*
608FUNCTION
609 bfd_set_reloc
610
611SYNOPSIS
612 void bfd_set_reloc
613 (bfd *abfd, asection *sec, arelent **rel, unsigned int count)
614
615DESCRIPTION
616 Set the relocation pointer and count within
617 section @var{sec} to the values @var{rel} and @var{count}.
618 The argument @var{abfd} is ignored.
619
620*/
aebad5fe 621
252b5132
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622void
623bfd_set_reloc (ignore_abfd, asect, location, count)
7442e600 624 bfd *ignore_abfd ATTRIBUTE_UNUSED;
252b5132
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625 sec_ptr asect;
626 arelent **location;
627 unsigned int count;
628{
629 asect->orelocation = location;
630 asect->reloc_count = count;
631}
632
633/*
634FUNCTION
635 bfd_set_file_flags
636
637SYNOPSIS
638 boolean bfd_set_file_flags(bfd *abfd, flagword flags);
639
640DESCRIPTION
641 Set the flag word in the BFD @var{abfd} to the value @var{flags}.
642
643 Possible errors are:
644 o <<bfd_error_wrong_format>> - The target bfd was not of object format.
645 o <<bfd_error_invalid_operation>> - The target bfd was open for reading.
646 o <<bfd_error_invalid_operation>> -
647 The flag word contained a bit which was not applicable to the
648 type of file. E.g., an attempt was made to set the <<D_PAGED>> bit
649 on a BFD format which does not support demand paging.
650
651*/
652
653boolean
654bfd_set_file_flags (abfd, flags)
655 bfd *abfd;
656 flagword flags;
657{
55ab10f0
NC
658 if (abfd->format != bfd_object)
659 {
660 bfd_set_error (bfd_error_wrong_format);
661 return false;
662 }
252b5132 663
55ab10f0
NC
664 if (bfd_read_p (abfd))
665 {
666 bfd_set_error (bfd_error_invalid_operation);
667 return false;
668 }
252b5132
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669
670 bfd_get_file_flags (abfd) = flags;
55ab10f0
NC
671 if ((flags & bfd_applicable_file_flags (abfd)) != flags)
672 {
673 bfd_set_error (bfd_error_invalid_operation);
674 return false;
675 }
252b5132 676
55ab10f0 677 return true;
252b5132
RH
678}
679
680void
681bfd_assert (file, line)
682 const char *file;
683 int line;
684{
685 (*_bfd_error_handler) (_("bfd assertion fail %s:%d"), file, line);
686}
687
c0bed66d
ILT
688/* A more or less friendly abort message. In libbfd.h abort is
689 defined to call this function. */
690
691#ifndef EXIT_FAILURE
692#define EXIT_FAILURE 1
693#endif
694
695void
696_bfd_abort (file, line, fn)
697 const char *file;
698 int line;
699 const char *fn;
700{
701 if (fn != NULL)
702 (*_bfd_error_handler)
703 (_("BFD internal error, aborting at %s line %d in %s\n"),
704 file, line, fn);
705 else
706 (*_bfd_error_handler)
707 (_("BFD internal error, aborting at %s line %d\n"),
708 file, line);
709 (*_bfd_error_handler) (_("Please report this bug.\n"));
710 xexit (EXIT_FAILURE);
711}
252b5132 712
125c4a69
NC
713/*
714FUNCTION
715 bfd_get_arch_size
716
717SYNOPSIS
718 int bfd_get_arch_size (bfd *abfd);
719
720DESCRIPTION
721 Returns the architecture address size, in bits, as determined
722 by the object file's format. For ELF, this information is
723 included in the header.
724
725RETURNS
726 Returns the arch size in bits if known, <<-1>> otherwise.
727*/
728
729int
730bfd_get_arch_size (abfd)
731 bfd *abfd;
732{
733 if (abfd->xvec->flavour == bfd_target_elf_flavour)
734 return (get_elf_backend_data (abfd))->s->arch_size;
735
736 bfd_set_error (bfd_error_wrong_format);
737 return -1;
738}
739
740/*
741FUNCTION
742 bfd_get_sign_extend_vma
743
744SYNOPSIS
745 int bfd_get_sign_extend_vma (bfd *abfd);
746
747DESCRIPTION
748 Indicates if the target architecture "naturally" sign extends
749 an address. Some architectures implicitly sign extend address
750 values when they are converted to types larger than the size
751 of an address. For instance, bfd_get_start_address() will
752 return an address sign extended to fill a bfd_vma when this is
753 the case.
754
755RETURNS
756 Returns <<1>> if the target architecture is known to sign
757 extend addresses, <<0>> if the target architecture is known to
758 not sign extend addresses, and <<-1>> otherwise.
759*/
760
761int
762bfd_get_sign_extend_vma (abfd)
763 bfd *abfd;
764{
f47e5071
NC
765 char *name;
766
125c4a69
NC
767 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
768 return (get_elf_backend_data (abfd)->sign_extend_vma);
769
f47e5071
NC
770 name = bfd_get_target (abfd);
771
772 /* Return a proper value for DJGPP COFF (an x86 COFF variant).
773 This function is required for DWARF2 support, but there is
774 no place to store this information in the COFF back end.
775 Should enough other COFF targets add support for DWARF2,
776 a place will have to be found. Until then, this hack will do. */
777 if (strncmp (name, "coff-go32", sizeof ("coff-go32") - 1) == 0)
778 return 1;
779
a022216b 780 bfd_set_error (bfd_error_wrong_format);
125c4a69
NC
781 return -1;
782}
783
252b5132
RH
784/*
785FUNCTION
786 bfd_set_start_address
787
788SYNOPSIS
789 boolean bfd_set_start_address(bfd *abfd, bfd_vma vma);
790
791DESCRIPTION
792 Make @var{vma} the entry point of output BFD @var{abfd}.
793
794RETURNS
795 Returns <<true>> on success, <<false>> otherwise.
796*/
797
798boolean
55ab10f0
NC
799bfd_set_start_address (abfd, vma)
800 bfd *abfd;
801 bfd_vma vma;
252b5132
RH
802{
803 abfd->start_address = vma;
804 return true;
805}
806
252b5132
RH
807/*
808FUNCTION
809 bfd_get_mtime
810
811SYNOPSIS
812 long bfd_get_mtime(bfd *abfd);
813
814DESCRIPTION
815 Return the file modification time (as read from the file system, or
816 from the archive header for archive members).
817
818*/
819
820long
821bfd_get_mtime (abfd)
822 bfd *abfd;
823{
824 FILE *fp;
825 struct stat buf;
826
827 if (abfd->mtime_set)
828 return abfd->mtime;
829
830 fp = bfd_cache_lookup (abfd);
831 if (0 != fstat (fileno (fp), &buf))
832 return 0;
833
834 abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */
835 return buf.st_mtime;
836}
837
838/*
839FUNCTION
840 bfd_get_size
841
842SYNOPSIS
843 long bfd_get_size(bfd *abfd);
844
845DESCRIPTION
846 Return the file size (as read from file system) for the file
847 associated with BFD @var{abfd}.
848
849 The initial motivation for, and use of, this routine is not
850 so we can get the exact size of the object the BFD applies to, since
851 that might not be generally possible (archive members for example).
852 It would be ideal if someone could eventually modify
853 it so that such results were guaranteed.
854
855 Instead, we want to ask questions like "is this NNN byte sized
856 object I'm about to try read from file offset YYY reasonable?"
857 As as example of where we might do this, some object formats
eb6e10cb 858 use string tables for which the first <<sizeof (long)>> bytes of the
252b5132
RH
859 table contain the size of the table itself, including the size bytes.
860 If an application tries to read what it thinks is one of these
861 string tables, without some way to validate the size, and for
862 some reason the size is wrong (byte swapping error, wrong location
863 for the string table, etc.), the only clue is likely to be a read
864 error when it tries to read the table, or a "virtual memory
865 exhausted" error when it tries to allocate 15 bazillon bytes
866 of space for the 15 bazillon byte table it is about to read.
867 This function at least allows us to answer the quesion, "is the
868 size reasonable?".
869*/
870
871long
872bfd_get_size (abfd)
873 bfd *abfd;
874{
875 FILE *fp;
876 struct stat buf;
877
878 if ((abfd->flags & BFD_IN_MEMORY) != 0)
879 return ((struct bfd_in_memory *) abfd->iostream)->size;
880
881 fp = bfd_cache_lookup (abfd);
55ab10f0 882 if (0 != fstat (fileno (fp), & buf))
252b5132
RH
883 return 0;
884
885 return buf.st_size;
886}
887
888/*
889FUNCTION
890 bfd_get_gp_size
891
892SYNOPSIS
c0846b23 893 unsigned int bfd_get_gp_size(bfd *abfd);
252b5132
RH
894
895DESCRIPTION
896 Return the maximum size of objects to be optimized using the GP
897 register under MIPS ECOFF. This is typically set by the <<-G>>
898 argument to the compiler, assembler or linker.
899*/
900
c0846b23 901unsigned int
252b5132
RH
902bfd_get_gp_size (abfd)
903 bfd *abfd;
904{
905 if (abfd->format == bfd_object)
906 {
907 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
908 return ecoff_data (abfd)->gp_size;
909 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
910 return elf_gp_size (abfd);
911 }
912 return 0;
913}
914
915/*
916FUNCTION
917 bfd_set_gp_size
918
919SYNOPSIS
c0846b23 920 void bfd_set_gp_size(bfd *abfd, unsigned int i);
252b5132
RH
921
922DESCRIPTION
923 Set the maximum size of objects to be optimized using the GP
924 register under ECOFF or MIPS ELF. This is typically set by
925 the <<-G>> argument to the compiler, assembler or linker.
926*/
927
928void
929bfd_set_gp_size (abfd, i)
930 bfd *abfd;
c0846b23 931 unsigned int i;
252b5132 932{
55ab10f0 933 /* Don't try to set GP size on an archive or core file! */
252b5132
RH
934 if (abfd->format != bfd_object)
935 return;
55ab10f0 936
252b5132
RH
937 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
938 ecoff_data (abfd)->gp_size = i;
939 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
940 elf_gp_size (abfd) = i;
941}
942
943/* Get the GP value. This is an internal function used by some of the
944 relocation special_function routines on targets which support a GP
945 register. */
946
947bfd_vma
948_bfd_get_gp_value (abfd)
949 bfd *abfd;
950{
55ab10f0
NC
951 if (abfd->format != bfd_object)
952 return 0;
953
954 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
955 return ecoff_data (abfd)->gp;
956 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
957 return elf_gp (abfd);
958
252b5132
RH
959 return 0;
960}
961
962/* Set the GP value. */
963
964void
965_bfd_set_gp_value (abfd, v)
966 bfd *abfd;
967 bfd_vma v;
968{
969 if (abfd->format != bfd_object)
970 return;
55ab10f0 971
252b5132
RH
972 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
973 ecoff_data (abfd)->gp = v;
974 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
975 elf_gp (abfd) = v;
976}
977
978/*
979FUNCTION
980 bfd_scan_vma
981
982SYNOPSIS
55ab10f0 983 bfd_vma bfd_scan_vma(const char *string, const char **end, int base);
252b5132
RH
984
985DESCRIPTION
986 Convert, like <<strtoul>>, a numerical expression
987 @var{string} into a <<bfd_vma>> integer, and return that integer.
988 (Though without as many bells and whistles as <<strtoul>>.)
989 The expression is assumed to be unsigned (i.e., positive).
990 If given a @var{base}, it is used as the base for conversion.
991 A base of 0 causes the function to interpret the string
992 in hex if a leading "0x" or "0X" is found, otherwise
993 in octal if a leading zero is found, otherwise in decimal.
994
995 Overflow is not detected.
996*/
997
998bfd_vma
999bfd_scan_vma (string, end, base)
55ab10f0
NC
1000 const char *string;
1001 const char **end;
252b5132
RH
1002 int base;
1003{
1004 bfd_vma value;
1005 int digit;
1006
1007 /* Let the host do it if possible. */
eb6e10cb 1008 if (sizeof (bfd_vma) <= sizeof (unsigned long))
252b5132
RH
1009 return (bfd_vma) strtoul (string, (char **) end, base);
1010
1011 /* A negative base makes no sense, and we only need to go as high as hex. */
1012 if ((base < 0) || (base > 16))
1013 return (bfd_vma) 0;
1014
1015 if (base == 0)
1016 {
1017 if (string[0] == '0')
1018 {
1019 if ((string[1] == 'x') || (string[1] == 'X'))
1020 base = 16;
55ab10f0 1021 /* XXX should we also allow "0b" or "0B" to set base to 2? */
252b5132
RH
1022 else
1023 base = 8;
1024 }
1025 else
1026 base = 10;
1027 }
55ab10f0 1028
252b5132
RH
1029 if ((base == 16) &&
1030 (string[0] == '0') && ((string[1] == 'x') || (string[1] == 'X')))
1031 string += 2;
55ab10f0 1032 /* XXX should we also skip over "0b" or "0B" if base is 2? */
aebad5fe 1033
252b5132
RH
1034/* Speed could be improved with a table like hex_value[] in gas. */
1035#define HEX_VALUE(c) \
3882b010
L
1036 (ISXDIGIT (c) \
1037 ? (ISDIGIT (c) \
252b5132 1038 ? (c - '0') \
3882b010 1039 : (10 + c - (ISLOWER (c) ? 'a' : 'A'))) \
252b5132
RH
1040 : 42)
1041
55ab10f0
NC
1042 for (value = 0; (digit = HEX_VALUE (* string)) < base; string ++)
1043 value = value * base + digit;
252b5132
RH
1044
1045 if (end)
55ab10f0 1046 * end = string;
252b5132
RH
1047
1048 return value;
1049}
1050
1051/*
1052FUNCTION
1053 bfd_copy_private_bfd_data
1054
1055SYNOPSIS
1056 boolean bfd_copy_private_bfd_data(bfd *ibfd, bfd *obfd);
1057
1058DESCRIPTION
aebad5fe 1059 Copy private BFD information from the BFD @var{ibfd} to the
252b5132
RH
1060 the BFD @var{obfd}. Return <<true>> on success, <<false>> on error.
1061 Possible error returns are:
1062
1063 o <<bfd_error_no_memory>> -
1064 Not enough memory exists to create private data for @var{obfd}.
1065
1066.#define bfd_copy_private_bfd_data(ibfd, obfd) \
1067. BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
1068. (ibfd, obfd))
1069
1070*/
1071
1072/*
1073FUNCTION
1074 bfd_merge_private_bfd_data
1075
1076SYNOPSIS
1077 boolean bfd_merge_private_bfd_data(bfd *ibfd, bfd *obfd);
1078
1079DESCRIPTION
aebad5fe 1080 Merge private BFD information from the BFD @var{ibfd} to the
252b5132
RH
1081 the output file BFD @var{obfd} when linking. Return <<true>>
1082 on success, <<false>> on error. Possible error returns are:
1083
1084 o <<bfd_error_no_memory>> -
1085 Not enough memory exists to create private data for @var{obfd}.
1086
1087.#define bfd_merge_private_bfd_data(ibfd, obfd) \
1088. BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
1089. (ibfd, obfd))
1090
1091*/
1092
1093/*
1094FUNCTION
1095 bfd_set_private_flags
1096
1097SYNOPSIS
1098 boolean bfd_set_private_flags(bfd *abfd, flagword flags);
1099
1100DESCRIPTION
1101 Set private BFD flag information in the BFD @var{abfd}.
1102 Return <<true>> on success, <<false>> on error. Possible error
1103 returns are:
1104
1105 o <<bfd_error_no_memory>> -
1106 Not enough memory exists to create private data for @var{obfd}.
1107
1108.#define bfd_set_private_flags(abfd, flags) \
1109. BFD_SEND (abfd, _bfd_set_private_flags, \
1110. (abfd, flags))
1111
1112*/
1113
1114/*
1115FUNCTION
1116 stuff
1117
1118DESCRIPTION
1119 Stuff which should be documented:
1120
1121.#define bfd_sizeof_headers(abfd, reloc) \
1122. BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc))
1123.
1124.#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
1125. BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, sec, syms, off, file, func, line))
1126.
1127. {* Do these three do anything useful at all, for any back end? *}
1128.#define bfd_debug_info_start(abfd) \
1129. BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
1130.
1131.#define bfd_debug_info_end(abfd) \
1132. BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
1133.
1134.#define bfd_debug_info_accumulate(abfd, section) \
1135. BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
1136.
1137.
1138.#define bfd_stat_arch_elt(abfd, stat) \
1139. BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
1140.
1141.#define bfd_update_armap_timestamp(abfd) \
1142. BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd))
1143.
1144.#define bfd_set_arch_mach(abfd, arch, mach)\
1145. BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
1146.
1147.#define bfd_relax_section(abfd, section, link_info, again) \
1148. BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again))
1149.
1150.#define bfd_gc_sections(abfd, link_info) \
1151. BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
8550eb6e
JJ
1152.
1153.#define bfd_merge_sections(abfd, link_info) \
1154. BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
252b5132
RH
1155.
1156.#define bfd_link_hash_table_create(abfd) \
1157. BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
1158.
1159.#define bfd_link_add_symbols(abfd, info) \
1160. BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
1161.
1162.#define bfd_final_link(abfd, info) \
1163. BFD_SEND (abfd, _bfd_final_link, (abfd, info))
1164.
1165.#define bfd_free_cached_info(abfd) \
1166. BFD_SEND (abfd, _bfd_free_cached_info, (abfd))
1167.
1168.#define bfd_get_dynamic_symtab_upper_bound(abfd) \
1169. BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd))
1170.
1171.#define bfd_print_private_bfd_data(abfd, file)\
1172. BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file))
1173.
1174.#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \
1175. BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols))
1176.
1177.#define bfd_get_dynamic_reloc_upper_bound(abfd) \
1178. BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd))
1179.
1180.#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \
1181. BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms))
1182.
1183.extern bfd_byte *bfd_get_relocated_section_contents
1184. PARAMS ((bfd *, struct bfd_link_info *,
1185. struct bfd_link_order *, bfd_byte *,
1186. boolean, asymbol **));
1187.
1188
1189*/
1190
1191bfd_byte *
1192bfd_get_relocated_section_contents (abfd, link_info, link_order, data,
1193 relocateable, symbols)
1194 bfd *abfd;
1195 struct bfd_link_info *link_info;
1196 struct bfd_link_order *link_order;
1197 bfd_byte *data;
1198 boolean relocateable;
1199 asymbol **symbols;
1200{
1201 bfd *abfd2;
1202 bfd_byte *(*fn) PARAMS ((bfd *, struct bfd_link_info *,
1203 struct bfd_link_order *, bfd_byte *, boolean,
1204 asymbol **));
1205
1206 if (link_order->type == bfd_indirect_link_order)
1207 {
1208 abfd2 = link_order->u.indirect.section->owner;
55ab10f0 1209 if (abfd2 == NULL)
252b5132
RH
1210 abfd2 = abfd;
1211 }
1212 else
1213 abfd2 = abfd;
55ab10f0 1214
252b5132
RH
1215 fn = abfd2->xvec->_bfd_get_relocated_section_contents;
1216
1217 return (*fn) (abfd, link_info, link_order, data, relocateable, symbols);
1218}
1219
1220/* Record information about an ELF program header. */
1221
1222boolean
1223bfd_record_phdr (abfd, type, flags_valid, flags, at_valid, at,
1224 includes_filehdr, includes_phdrs, count, secs)
1225 bfd *abfd;
1226 unsigned long type;
1227 boolean flags_valid;
1228 flagword flags;
1229 boolean at_valid;
1230 bfd_vma at;
1231 boolean includes_filehdr;
1232 boolean includes_phdrs;
1233 unsigned int count;
1234 asection **secs;
1235{
1236 struct elf_segment_map *m, **pm;
dc810e39 1237 bfd_size_type amt;
252b5132
RH
1238
1239 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
1240 return true;
1241
dc810e39
AM
1242 amt = sizeof (struct elf_segment_map);
1243 amt += ((bfd_size_type) count - 1) * sizeof (asection *);
1244 m = (struct elf_segment_map *) bfd_alloc (abfd, amt);
252b5132
RH
1245 if (m == NULL)
1246 return false;
1247
1248 m->next = NULL;
1249 m->p_type = type;
1250 m->p_flags = flags;
1251 m->p_paddr = at;
1252 m->p_flags_valid = flags_valid;
1253 m->p_paddr_valid = at_valid;
1254 m->includes_filehdr = includes_filehdr;
1255 m->includes_phdrs = includes_phdrs;
1256 m->count = count;
1257 if (count > 0)
1258 memcpy (m->sections, secs, count * sizeof (asection *));
1259
1260 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next)
1261 ;
1262 *pm = m;
1263
1264 return true;
1265}
ae4221d7
L
1266
1267void
1268bfd_sprintf_vma (abfd, buf, value)
1269 bfd *abfd;
1270 char *buf;
1271 bfd_vma value;
1272{
1273 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
4e771d61 1274 get_elf_backend_data (abfd)->elf_backend_sprintf_vma (abfd, buf, value);
ef071f24
L
1275 else
1276 sprintf_vma (buf, value);
ae4221d7
L
1277}
1278
1279void
1280bfd_fprintf_vma (abfd, stream, value)
1281 bfd *abfd;
1282 PTR stream;
1283 bfd_vma value;
1284{
1285 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
4e771d61 1286 get_elf_backend_data (abfd)->elf_backend_fprintf_vma (abfd, stream, value);
ef071f24
L
1287 else
1288 fprintf_vma ((FILE *) stream, value);
ae4221d7 1289}
8c98ec7d
AO
1290
1291/*
1292FUNCTION
1293 bfd_alt_mach_code
1294
1295SYNOPSIS
1296 boolean bfd_alt_mach_code(bfd *abfd, int index);
1297
1298DESCRIPTION
1299
1300 When more than one machine code number is available for the
1301 same machine type, this function can be used to switch between
1302 the preferred one (index == 0) and any others. Currently,
1303 only ELF supports this feature, with up to two alternate
1304 machine codes.
1305*/
1306
1307boolean
1308bfd_alt_mach_code (abfd, index)
1309 bfd *abfd;
1310 int index;
1311{
1312 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1313 {
1314 int code;
1315
1316 switch (index)
1317 {
1318 case 0:
1319 code = get_elf_backend_data (abfd)->elf_machine_code;
1320 break;
1321
1322 case 1:
1323 code = get_elf_backend_data (abfd)->elf_machine_alt1;
1324 if (code == 0)
1325 return false;
1326 break;
1327
1328 case 2:
1329 code = get_elf_backend_data (abfd)->elf_machine_alt2;
1330 if (code == 0)
1331 return false;
1332 break;
1333
1334 default:
1335 return false;
1336 }
1337
1338 elf_elfheader (abfd)->e_machine = code;
1339
1340 return true;
1341 }
1342
1343 return false;
1344}
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