1 /* opncls.c -- open and close a BFD.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012
4 Free Software Foundation, Inc.
6 Written by Cygnus Support.
8 This file is part of BFD, the Binary File Descriptor library.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
29 #include "libiberty.h"
32 #define S_IXUSR 0100 /* Execute by owner. */
35 #define S_IXGRP 0010 /* Execute by group. */
38 #define S_IXOTH 0001 /* Execute by others. */
41 /* Counters used to initialize the bfd identifier. */
43 static unsigned int bfd_id_counter = 0;
44 static unsigned int bfd_reserved_id_counter = 0;
48 .{* Set to N to open the next N BFDs using an alternate id space. *}
49 .extern unsigned int bfd_use_reserved_id;
51 unsigned int bfd_use_reserved_id = 0;
53 /* fdopen is a loser -- we should use stdio exclusively. Unfortunately
54 if we do that we can't use fcntl. */
56 /* Return a new BFD. All BFD's are allocated through this routine. */
63 nbfd = (bfd *) bfd_zmalloc (sizeof (bfd));
67 if (bfd_use_reserved_id)
69 nbfd->id = --bfd_reserved_id_counter;
70 --bfd_use_reserved_id;
73 nbfd->id = bfd_id_counter++;
75 nbfd->memory = objalloc_create ();
76 if (nbfd->memory == NULL)
78 bfd_set_error (bfd_error_no_memory);
83 nbfd->arch_info = &bfd_default_arch_struct;
85 nbfd->direction = no_direction;
86 nbfd->iostream = NULL;
88 if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc,
89 sizeof (struct section_hash_entry), 251))
94 nbfd->sections = NULL;
95 nbfd->section_last = NULL;
96 nbfd->format = bfd_unknown;
97 nbfd->my_archive = NULL;
99 nbfd->opened_once = FALSE;
100 nbfd->output_has_begun = FALSE;
101 nbfd->section_count = 0;
102 nbfd->usrdata = NULL;
103 nbfd->cacheable = FALSE;
104 nbfd->flags = BFD_NO_FLAGS;
105 nbfd->mtime_set = FALSE;
110 /* Allocate a new BFD as a member of archive OBFD. */
113 _bfd_new_bfd_contained_in (bfd *obfd)
117 nbfd = _bfd_new_bfd ();
120 nbfd->xvec = obfd->xvec;
121 nbfd->iovec = obfd->iovec;
122 nbfd->my_archive = obfd;
123 nbfd->direction = read_direction;
124 nbfd->target_defaulted = obfd->target_defaulted;
131 _bfd_delete_bfd (bfd *abfd)
135 bfd_hash_table_free (&abfd->section_htab);
136 objalloc_free ((struct objalloc *) abfd->memory);
141 /* Free objalloc memory. */
144 _bfd_free_cached_info (bfd *abfd)
148 bfd_hash_table_free (&abfd->section_htab);
149 objalloc_free ((struct objalloc *) abfd->memory);
151 abfd->sections = NULL;
152 abfd->section_last = NULL;
153 abfd->outsymbols = NULL;
154 abfd->tdata.any = NULL;
155 abfd->usrdata = NULL;
164 Opening and closing BFDs
167 Functions for opening and closing
175 bfd *bfd_fopen (const char *filename, const char *target,
176 const char *mode, int fd);
179 Open the file @var{filename} with the target @var{target}.
180 Return a pointer to the created BFD. If @var{fd} is not -1,
181 then <<fdopen>> is used to open the file; otherwise, <<fopen>>
182 is used. @var{mode} is passed directly to <<fopen>> or
185 Calls <<bfd_find_target>>, so @var{target} is interpreted as by
188 The new BFD is marked as cacheable iff @var{fd} is -1.
190 If <<NULL>> is returned then an error has occured. Possible errors
191 are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
192 <<system_call>> error.
194 On error, @var{fd} is always closed.
198 bfd_fopen (const char *filename, const char *target, const char *mode, int fd)
201 const bfd_target *target_vec;
203 nbfd = _bfd_new_bfd ();
211 target_vec = bfd_find_target (target, nbfd);
212 if (target_vec == NULL)
216 _bfd_delete_bfd (nbfd);
222 nbfd->iostream = fdopen (fd, mode);
225 nbfd->iostream = real_fopen (filename, mode);
226 if (nbfd->iostream == NULL)
228 bfd_set_error (bfd_error_system_call);
229 _bfd_delete_bfd (nbfd);
233 /* OK, put everything where it belongs. */
234 nbfd->filename = filename;
236 /* Figure out whether the user is opening the file for reading,
237 writing, or both, by looking at the MODE argument. */
238 if ((mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a')
240 nbfd->direction = both_direction;
241 else if (mode[0] == 'r')
242 nbfd->direction = read_direction;
244 nbfd->direction = write_direction;
246 if (! bfd_cache_init (nbfd))
248 _bfd_delete_bfd (nbfd);
251 nbfd->opened_once = TRUE;
252 /* If we opened the file by name, mark it cacheable; we can close it
253 and reopen it later. However, if a file descriptor was provided,
254 then it may have been opened with special flags that make it
255 unsafe to close and reopen the file. */
257 bfd_set_cacheable (nbfd, TRUE);
267 bfd *bfd_openr (const char *filename, const char *target);
270 Open the file @var{filename} (using <<fopen>>) with the target
271 @var{target}. Return a pointer to the created BFD.
273 Calls <<bfd_find_target>>, so @var{target} is interpreted as by
276 If <<NULL>> is returned then an error has occured. Possible errors
277 are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
278 <<system_call>> error.
282 bfd_openr (const char *filename, const char *target)
284 return bfd_fopen (filename, target, FOPEN_RB, -1);
287 /* Don't try to `optimize' this function:
289 o - We lock using stack space so that interrupting the locking
290 won't cause a storage leak.
291 o - We open the file stream last, since we don't want to have to
292 close it if anything goes wrong. Closing the stream means closing
293 the file descriptor too, even though we didn't open it. */
299 bfd *bfd_fdopenr (const char *filename, const char *target, int fd);
302 <<bfd_fdopenr>> is to <<bfd_fopenr>> much like <<fdopen>> is to
303 <<fopen>>. It opens a BFD on a file already described by the
306 When the file is later <<bfd_close>>d, the file descriptor will
307 be closed. If the caller desires that this file descriptor be
308 cached by BFD (opened as needed, closed as needed to free
309 descriptors for other opens), with the supplied @var{fd} used as
310 an initial file descriptor (but subject to closure at any time),
311 call bfd_set_cacheable(bfd, 1) on the returned BFD. The default
312 is to assume no caching; the file descriptor will remain open
313 until <<bfd_close>>, and will not be affected by BFD operations
316 Possible errors are <<bfd_error_no_memory>>,
317 <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
319 On error, @var{fd} is closed.
323 bfd_fdopenr (const char *filename, const char *target, int fd)
326 #if defined(HAVE_FCNTL) && defined(F_GETFL)
330 #if ! defined(HAVE_FCNTL) || ! defined(F_GETFL)
331 mode = FOPEN_RUB; /* Assume full access. */
333 fdflags = fcntl (fd, F_GETFL, NULL);
340 bfd_set_error (bfd_error_system_call);
344 /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */
345 switch (fdflags & (O_ACCMODE))
347 case O_RDONLY: mode = FOPEN_RB; break;
348 case O_WRONLY: mode = FOPEN_RUB; break;
349 case O_RDWR: mode = FOPEN_RUB; break;
354 return bfd_fopen (filename, target, mode, fd);
362 bfd *bfd_openstreamr (const char *, const char *, void *);
366 Open a BFD for read access on an existing stdio stream. When
367 the BFD is passed to <<bfd_close>>, the stream will be closed.
371 bfd_openstreamr (const char *filename, const char *target, void *streamarg)
373 FILE *stream = (FILE *) streamarg;
375 const bfd_target *target_vec;
377 nbfd = _bfd_new_bfd ();
381 target_vec = bfd_find_target (target, nbfd);
382 if (target_vec == NULL)
384 _bfd_delete_bfd (nbfd);
388 nbfd->iostream = stream;
389 nbfd->filename = filename;
390 nbfd->direction = read_direction;
392 if (! bfd_cache_init (nbfd))
394 _bfd_delete_bfd (nbfd);
406 bfd *bfd_openr_iovec (const char *filename, const char *target,
407 void *(*open_func) (struct bfd *nbfd,
410 file_ptr (*pread_func) (struct bfd *nbfd,
415 int (*close_func) (struct bfd *nbfd,
417 int (*stat_func) (struct bfd *abfd,
423 Create and return a BFD backed by a read-only @var{stream}.
424 The @var{stream} is created using @var{open_func}, accessed using
425 @var{pread_func} and destroyed using @var{close_func}.
427 Calls <<bfd_find_target>>, so @var{target} is interpreted as by
430 Calls @var{open_func} (which can call <<bfd_zalloc>> and
431 <<bfd_get_filename>>) to obtain the read-only stream backing
432 the BFD. @var{open_func} either succeeds returning the
433 non-<<NULL>> @var{stream}, or fails returning <<NULL>>
434 (setting <<bfd_error>>).
436 Calls @var{pread_func} to request @var{nbytes} of data from
437 @var{stream} starting at @var{offset} (e.g., via a call to
438 <<bfd_read>>). @var{pread_func} either succeeds returning the
439 number of bytes read (which can be less than @var{nbytes} when
440 end-of-file), or fails returning -1 (setting <<bfd_error>>).
442 Calls @var{close_func} when the BFD is later closed using
443 <<bfd_close>>. @var{close_func} either succeeds returning 0, or
444 fails returning -1 (setting <<bfd_error>>).
446 Calls @var{stat_func} to fill in a stat structure for bfd_stat,
447 bfd_get_size, and bfd_get_mtime calls. @var{stat_func} returns 0
448 on success, or returns -1 on failure (setting <<bfd_error>>).
450 If <<bfd_openr_iovec>> returns <<NULL>> then an error has
451 occurred. Possible errors are <<bfd_error_no_memory>>,
452 <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
459 file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf,
460 file_ptr nbytes, file_ptr offset);
461 int (*close) (struct bfd *abfd, void *stream);
462 int (*stat) (struct bfd *abfd, void *stream, struct stat *sb);
467 opncls_btell (struct bfd *abfd)
469 struct opncls *vec = (struct opncls *) abfd->iostream;
474 opncls_bseek (struct bfd *abfd, file_ptr offset, int whence)
476 struct opncls *vec = (struct opncls *) abfd->iostream;
479 case SEEK_SET: vec->where = offset; break;
480 case SEEK_CUR: vec->where += offset; break;
481 case SEEK_END: return -1;
487 opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes)
489 struct opncls *vec = (struct opncls *) abfd->iostream;
490 file_ptr nread = (vec->pread) (abfd, vec->stream, buf, nbytes, vec->where);
498 opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED,
499 const void *where ATTRIBUTE_UNUSED,
500 file_ptr nbytes ATTRIBUTE_UNUSED)
506 opncls_bclose (struct bfd *abfd)
508 struct opncls *vec = (struct opncls *) abfd->iostream;
509 /* Since the VEC's memory is bound to the bfd deleting the bfd will
512 if (vec->close != NULL)
513 status = (vec->close) (abfd, vec->stream);
514 abfd->iostream = NULL;
519 opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED)
525 opncls_bstat (struct bfd *abfd, struct stat *sb)
527 struct opncls *vec = (struct opncls *) abfd->iostream;
529 memset (sb, 0, sizeof (*sb));
530 if (vec->stat == NULL)
533 return (vec->stat) (abfd, vec->stream, sb);
537 opncls_bmmap (struct bfd *abfd ATTRIBUTE_UNUSED,
538 void *addr ATTRIBUTE_UNUSED,
539 bfd_size_type len ATTRIBUTE_UNUSED,
540 int prot ATTRIBUTE_UNUSED,
541 int flags ATTRIBUTE_UNUSED,
542 file_ptr offset ATTRIBUTE_UNUSED,
543 void **map_addr ATTRIBUTE_UNUSED,
544 bfd_size_type *map_len ATTRIBUTE_UNUSED)
549 static const struct bfd_iovec opncls_iovec = {
550 &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek,
551 &opncls_bclose, &opncls_bflush, &opncls_bstat, &opncls_bmmap
555 bfd_openr_iovec (const char *filename, const char *target,
556 void *(*open_p) (struct bfd *, void *),
558 file_ptr (*pread_p) (struct bfd *, void *, void *,
560 int (*close_p) (struct bfd *, void *),
561 int (*stat_p) (struct bfd *, void *, struct stat *))
564 const bfd_target *target_vec;
568 nbfd = _bfd_new_bfd ();
572 target_vec = bfd_find_target (target, nbfd);
573 if (target_vec == NULL)
575 _bfd_delete_bfd (nbfd);
579 nbfd->filename = filename;
580 nbfd->direction = read_direction;
582 /* `open_p (...)' would get expanded by an the open(2) syscall macro. */
583 stream = (*open_p) (nbfd, open_closure);
586 _bfd_delete_bfd (nbfd);
590 vec = (struct opncls *) bfd_zalloc (nbfd, sizeof (struct opncls));
591 vec->stream = stream;
592 vec->pread = pread_p;
593 vec->close = close_p;
596 nbfd->iovec = &opncls_iovec;
597 nbfd->iostream = vec;
602 /* bfd_openw -- open for writing.
603 Returns a pointer to a freshly-allocated BFD on success, or NULL.
605 See comment by bfd_fdopenr before you try to modify this function. */
612 bfd *bfd_openw (const char *filename, const char *target);
615 Create a BFD, associated with file @var{filename}, using the
616 file format @var{target}, and return a pointer to it.
618 Possible errors are <<bfd_error_system_call>>, <<bfd_error_no_memory>>,
619 <<bfd_error_invalid_target>>.
623 bfd_openw (const char *filename, const char *target)
626 const bfd_target *target_vec;
628 /* nbfd has to point to head of malloc'ed block so that bfd_close may
629 reclaim it correctly. */
630 nbfd = _bfd_new_bfd ();
634 target_vec = bfd_find_target (target, nbfd);
635 if (target_vec == NULL)
637 _bfd_delete_bfd (nbfd);
641 nbfd->filename = filename;
642 nbfd->direction = write_direction;
644 if (bfd_open_file (nbfd) == NULL)
646 /* File not writeable, etc. */
647 bfd_set_error (bfd_error_system_call);
648 _bfd_delete_bfd (nbfd);
656 _maybe_make_executable (bfd * abfd)
658 /* If the file was open for writing and is now executable,
660 if (abfd->direction == write_direction
661 && (abfd->flags & (EXEC_P | DYNAMIC)) != 0)
665 if (stat (abfd->filename, &buf) == 0
666 /* Do not attempt to change non-regular files. This is
667 here especially for configure scripts and kernel builds
668 which run tests with "ld [...] -o /dev/null". */
669 && S_ISREG(buf.st_mode))
671 unsigned int mask = umask (0);
674 chmod (abfd->filename,
676 & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
687 bfd_boolean bfd_close (bfd *abfd);
691 Close a BFD. If the BFD was open for writing, then pending
692 operations are completed and the file written out and closed.
693 If the created file is executable, then <<chmod>> is called
696 All memory attached to the BFD is released.
698 The file descriptor associated with the BFD is closed (even
699 if it was passed in to BFD by <<bfd_fdopenr>>).
702 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
707 bfd_close (bfd *abfd)
713 if (bfd_write_p (abfd))
715 if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
719 /* Close nested archives (if this bfd is a thin archive). */
720 for (nbfd = abfd->nested_archives; nbfd; nbfd = next)
722 next = nbfd->archive_next;
726 if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
729 ret = abfd->iovec->bclose (abfd);
732 _maybe_make_executable (abfd);
734 _bfd_delete_bfd (abfd);
744 bfd_boolean bfd_close_all_done (bfd *);
747 Close a BFD. Differs from <<bfd_close>> since it does not
748 complete any pending operations. This routine would be used
749 if the application had just used BFD for swapping and didn't
750 want to use any of the writing code.
752 If the created file is executable, then <<chmod>> is called
755 All memory attached to the BFD is released.
758 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
762 bfd_close_all_done (bfd *abfd)
766 ret = bfd_cache_close (abfd);
769 _maybe_make_executable (abfd);
771 _bfd_delete_bfd (abfd);
781 bfd *bfd_create (const char *filename, bfd *templ);
784 Create a new BFD in the manner of <<bfd_openw>>, but without
785 opening a file. The new BFD takes the target from the target
786 used by @var{templ}. The format is always set to <<bfd_object>>.
790 bfd_create (const char *filename, bfd *templ)
794 nbfd = _bfd_new_bfd ();
797 nbfd->filename = filename;
799 nbfd->xvec = templ->xvec;
800 nbfd->direction = no_direction;
801 bfd_set_format (nbfd, bfd_object);
811 bfd_boolean bfd_make_writable (bfd *abfd);
814 Takes a BFD as created by <<bfd_create>> and converts it
815 into one like as returned by <<bfd_openw>>. It does this
816 by converting the BFD to BFD_IN_MEMORY. It's assumed that
817 you will call <<bfd_make_readable>> on this bfd later.
820 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
824 bfd_make_writable (bfd *abfd)
826 struct bfd_in_memory *bim;
828 if (abfd->direction != no_direction)
830 bfd_set_error (bfd_error_invalid_operation);
834 bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory));
836 return FALSE; /* bfd_error already set. */
837 abfd->iostream = bim;
838 /* bfd_bwrite will grow these as needed. */
842 abfd->flags |= BFD_IN_MEMORY;
843 abfd->iovec = &_bfd_memory_iovec;
845 abfd->direction = write_direction;
856 bfd_boolean bfd_make_readable (bfd *abfd);
859 Takes a BFD as created by <<bfd_create>> and
860 <<bfd_make_writable>> and converts it into one like as
861 returned by <<bfd_openr>>. It does this by writing the
862 contents out to the memory buffer, then reversing the
866 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. */
869 bfd_make_readable (bfd *abfd)
871 if (abfd->direction != write_direction || !(abfd->flags & BFD_IN_MEMORY))
873 bfd_set_error (bfd_error_invalid_operation);
877 if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
880 if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
883 abfd->arch_info = &bfd_default_arch_struct;
886 abfd->format = bfd_unknown;
887 abfd->my_archive = NULL;
889 abfd->opened_once = FALSE;
890 abfd->output_has_begun = FALSE;
891 abfd->section_count = 0;
892 abfd->usrdata = NULL;
893 abfd->cacheable = FALSE;
894 abfd->flags |= BFD_IN_MEMORY;
895 abfd->mtime_set = FALSE;
897 abfd->target_defaulted = TRUE;
898 abfd->direction = read_direction;
901 abfd->outsymbols = 0;
904 bfd_section_list_clear (abfd);
905 bfd_check_format (abfd, bfd_object);
915 void *bfd_alloc (bfd *abfd, bfd_size_type wanted);
918 Allocate a block of @var{wanted} bytes of memory attached to
919 <<abfd>> and return a pointer to it.
923 bfd_alloc (bfd *abfd, bfd_size_type size)
927 if (size != (unsigned long) size)
929 bfd_set_error (bfd_error_no_memory);
933 ret = objalloc_alloc ((struct objalloc *) abfd->memory, (unsigned long) size);
935 bfd_set_error (bfd_error_no_memory);
944 void *bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size);
947 Allocate a block of @var{nmemb} elements of @var{size} bytes each
948 of memory attached to <<abfd>> and return a pointer to it.
952 bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size)
956 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
958 && nmemb > ~(bfd_size_type) 0 / size)
960 bfd_set_error (bfd_error_no_memory);
966 if (size != (unsigned long) size)
968 bfd_set_error (bfd_error_no_memory);
972 ret = objalloc_alloc ((struct objalloc *) abfd->memory, (unsigned long) size);
974 bfd_set_error (bfd_error_no_memory);
983 void *bfd_zalloc (bfd *abfd, bfd_size_type wanted);
986 Allocate a block of @var{wanted} bytes of zeroed memory
987 attached to <<abfd>> and return a pointer to it.
991 bfd_zalloc (bfd *abfd, bfd_size_type size)
995 res = bfd_alloc (abfd, size);
997 memset (res, 0, (size_t) size);
1006 void *bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size);
1009 Allocate a block of @var{nmemb} elements of @var{size} bytes each
1010 of zeroed memory attached to <<abfd>> and return a pointer to it.
1014 bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size)
1018 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
1020 && nmemb > ~(bfd_size_type) 0 / size)
1022 bfd_set_error (bfd_error_no_memory);
1028 res = bfd_alloc (abfd, size);
1030 memset (res, 0, (size_t) size);
1034 /* Free a block allocated for a BFD.
1035 Note: Also frees all more recently allocated blocks! */
1038 bfd_release (bfd *abfd, void *block)
1040 objalloc_free_block ((struct objalloc *) abfd->memory, block);
1045 GNU Extension: separate debug-info files
1047 The idea here is that a special section called .gnu_debuglink might be
1048 embedded in a binary file, which indicates that some *other* file
1049 contains the real debugging information. This special section contains a
1050 filename and CRC32 checksum, which we read and resolve to another file,
1053 This facilitates "optional" provision of debugging information, without
1054 having to provide two complete copies of every binary object (with and
1055 without debug symbols).
1058 #define GNU_DEBUGLINK ".gnu_debuglink"
1061 bfd_calc_gnu_debuglink_crc32
1064 unsigned long bfd_calc_gnu_debuglink_crc32
1065 (unsigned long crc, const unsigned char *buf, bfd_size_type len);
1068 Computes a CRC value as used in the .gnu_debuglink section.
1069 Advances the previously computed @var{crc} value by computing
1070 and adding in the crc32 for @var{len} bytes of @var{buf}.
1073 Return the updated CRC32 value.
1077 bfd_calc_gnu_debuglink_crc32 (unsigned long crc,
1078 const unsigned char *buf,
1081 static const unsigned long crc32_table[256] =
1083 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
1084 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
1085 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
1086 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
1087 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
1088 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
1089 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
1090 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
1091 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
1092 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
1093 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
1094 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
1095 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
1096 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
1097 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
1098 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
1099 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
1100 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
1101 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
1102 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
1103 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
1104 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
1105 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
1106 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
1107 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
1108 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
1109 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
1110 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
1111 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
1112 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
1113 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
1114 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
1115 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
1116 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
1117 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
1118 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
1119 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
1120 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
1121 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
1122 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
1123 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
1124 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
1125 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
1126 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
1127 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
1128 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
1129 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
1130 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
1131 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
1132 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
1133 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
1136 const unsigned char *end;
1138 crc = ~crc & 0xffffffff;
1139 for (end = buf + len; buf < end; ++ buf)
1140 crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
1141 return ~crc & 0xffffffff;;
1150 char *get_debug_link_info (bfd *abfd, unsigned long *crc32_out);
1153 fetch the filename and CRC32 value for any separate debuginfo
1154 associated with @var{abfd}. Return NULL if no such info found,
1155 otherwise return filename and update @var{crc32_out}.
1159 get_debug_link_info (bfd *abfd, unsigned long *crc32_out)
1162 unsigned long crc32;
1168 BFD_ASSERT (crc32_out);
1170 sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
1175 if (!bfd_malloc_and_get_section (abfd, sect, &contents))
1177 if (contents != NULL)
1182 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1183 name = (char *) contents;
1184 crc_offset = strlen (name) + 1;
1185 crc_offset = (crc_offset + 3) & ~3;
1187 crc32 = bfd_get_32 (abfd, contents + crc_offset);
1195 separate_debug_file_exists
1198 bfd_boolean separate_debug_file_exists
1199 (char *name, unsigned long crc32);
1202 Checks to see if @var{name} is a file and if its contents
1207 separate_debug_file_exists (const char *name, const unsigned long crc)
1209 static unsigned char buffer [8 * 1024];
1210 unsigned long file_crc = 0;
1212 bfd_size_type count;
1216 f = real_fopen (name, FOPEN_RB);
1220 while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0)
1221 file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
1225 return crc == file_crc;
1231 find_separate_debug_file
1234 char *find_separate_debug_file (bfd *abfd);
1237 Searches @var{abfd} for a reference to separate debugging
1238 information, scans various locations in the filesystem, including
1239 the file tree rooted at @var{debug_file_directory}, and returns a
1240 filename of such debugging information if the file is found and has
1241 matching CRC32. Returns NULL if no reference to debugging file
1242 exists, or file cannot be found.
1246 find_separate_debug_file (bfd *abfd, const char *debug_file_directory)
1252 unsigned long crc32;
1254 size_t canon_dirlen;
1257 if (debug_file_directory == NULL)
1258 debug_file_directory = ".";
1260 /* BFD may have been opened from a stream. */
1261 if (abfd->filename == NULL)
1263 bfd_set_error (bfd_error_invalid_operation);
1267 base = get_debug_link_info (abfd, & crc32);
1271 if (base[0] == '\0')
1274 bfd_set_error (bfd_error_no_debug_section);
1278 for (dirlen = strlen (abfd->filename); dirlen > 0; dirlen--)
1279 if (IS_DIR_SEPARATOR (abfd->filename[dirlen - 1]))
1282 dir = (char *) bfd_malloc (dirlen + 1);
1288 memcpy (dir, abfd->filename, dirlen);
1291 /* Compute the canonical name of the bfd object with all symbolic links
1292 resolved, for use in the global debugfile directory. */
1293 canon_dir = lrealpath (abfd->filename);
1294 for (canon_dirlen = strlen (canon_dir); canon_dirlen > 0; canon_dirlen--)
1295 if (IS_DIR_SEPARATOR (canon_dir[canon_dirlen - 1]))
1297 canon_dir[canon_dirlen] = '\0';
1299 debugfile = (char *)
1300 bfd_malloc (strlen (debug_file_directory) + 1
1301 + (canon_dirlen > dirlen ? canon_dirlen : dirlen)
1302 + strlen (".debug/")
1305 if (debugfile == NULL)
1313 /* First try in the same directory as the original file: */
1314 strcpy (debugfile, dir);
1315 strcat (debugfile, base);
1317 if (separate_debug_file_exists (debugfile, crc32))
1325 /* Then try in a subdirectory called .debug. */
1326 strcpy (debugfile, dir);
1327 strcat (debugfile, ".debug/");
1328 strcat (debugfile, base);
1330 if (separate_debug_file_exists (debugfile, crc32))
1338 /* Then try in the global debugfile directory. */
1339 strcpy (debugfile, debug_file_directory);
1340 dirlen = strlen (debug_file_directory) - 1;
1342 && debug_file_directory[dirlen] != '/'
1343 && canon_dir[0] != '/')
1344 strcat (debugfile, "/");
1345 strcat (debugfile, canon_dir);
1346 strcat (debugfile, base);
1348 if (separate_debug_file_exists (debugfile, crc32))
1366 bfd_follow_gnu_debuglink
1369 char *bfd_follow_gnu_debuglink (bfd *abfd, const char *dir);
1373 Takes a BFD and searches it for a .gnu_debuglink section. If this
1374 section is found, it examines the section for the name and checksum
1375 of a '.debug' file containing auxiliary debugging information. It
1376 then searches the filesystem for this .debug file in some standard
1377 locations, including the directory tree rooted at @var{dir}, and if
1378 found returns the full filename.
1380 If @var{dir} is NULL, it will search a default path configured into
1381 libbfd at build time. [XXX this feature is not currently
1385 <<NULL>> on any errors or failure to locate the .debug file,
1386 otherwise a pointer to a heap-allocated string containing the
1387 filename. The caller is responsible for freeing this string.
1391 bfd_follow_gnu_debuglink (bfd *abfd, const char *dir)
1393 return find_separate_debug_file (abfd, dir);
1398 bfd_create_gnu_debuglink_section
1401 struct bfd_section *bfd_create_gnu_debuglink_section
1402 (bfd *abfd, const char *filename);
1406 Takes a @var{BFD} and adds a .gnu_debuglink section to it. The section is sized
1407 to be big enough to contain a link to the specified @var{filename}.
1410 A pointer to the new section is returned if all is ok. Otherwise <<NULL>> is
1411 returned and bfd_error is set.
1415 bfd_create_gnu_debuglink_section (bfd *abfd, const char *filename)
1418 bfd_size_type debuglink_size;
1421 if (abfd == NULL || filename == NULL)
1423 bfd_set_error (bfd_error_invalid_operation);
1427 /* Strip off any path components in filename. */
1428 filename = lbasename (filename);
1430 sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
1433 /* Section already exists. */
1434 bfd_set_error (bfd_error_invalid_operation);
1438 flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING;
1439 sect = bfd_make_section_with_flags (abfd, GNU_DEBUGLINK, flags);
1443 debuglink_size = strlen (filename) + 1;
1444 debuglink_size += 3;
1445 debuglink_size &= ~3;
1446 debuglink_size += 4;
1448 if (! bfd_set_section_size (abfd, sect, debuglink_size))
1449 /* XXX Should we delete the section from the bfd ? */
1458 bfd_fill_in_gnu_debuglink_section
1461 bfd_boolean bfd_fill_in_gnu_debuglink_section
1462 (bfd *abfd, struct bfd_section *sect, const char *filename);
1466 Takes a @var{BFD} and containing a .gnu_debuglink section @var{SECT}
1467 and fills in the contents of the section to contain a link to the
1468 specified @var{filename}. The filename should be relative to the
1472 <<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned
1473 and bfd_error is set.
1477 bfd_fill_in_gnu_debuglink_section (bfd *abfd,
1478 struct bfd_section *sect,
1479 const char *filename)
1481 bfd_size_type debuglink_size;
1482 unsigned long crc32;
1484 bfd_size_type crc_offset;
1486 static unsigned char buffer[8 * 1024];
1490 if (abfd == NULL || sect == NULL || filename == NULL)
1492 bfd_set_error (bfd_error_invalid_operation);
1496 /* Make sure that we can read the file.
1497 XXX - Should we attempt to locate the debug info file using the same
1498 algorithm as gdb ? At the moment, since we are creating the
1499 .gnu_debuglink section, we insist upon the user providing us with a
1500 correct-for-section-creation-time path, but this need not conform to
1501 the gdb location algorithm. */
1502 handle = real_fopen (filename, FOPEN_RB);
1505 bfd_set_error (bfd_error_system_call);
1510 while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0)
1511 crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count);
1514 /* Strip off any path components in filename,
1515 now that we no longer need them. */
1516 filename = lbasename (filename);
1518 filelen = strlen (filename);
1519 debuglink_size = filelen + 1;
1520 debuglink_size += 3;
1521 debuglink_size &= ~3;
1522 debuglink_size += 4;
1524 contents = (char *) bfd_malloc (debuglink_size);
1525 if (contents == NULL)
1527 /* XXX Should we delete the section from the bfd ? */
1531 crc_offset = debuglink_size - 4;
1532 memcpy (contents, filename, filelen);
1533 memset (contents + filelen, 0, crc_offset - filelen);
1535 bfd_put_32 (abfd, crc32, contents + crc_offset);
1537 if (! bfd_set_section_contents (abfd, sect, contents, 0, debuglink_size))
1539 /* XXX Should we delete the section from the bfd ? */