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
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 /* Counter used to initialize the bfd identifier. */
43 static unsigned int _bfd_id_counter = 0;
45 /* fdopen is a loser -- we should use stdio exclusively. Unfortunately
46 if we do that we can't use fcntl. */
48 /* Return a new BFD. All BFD's are allocated through this routine. */
55 nbfd = bfd_zmalloc (sizeof (bfd));
59 nbfd->id = _bfd_id_counter++;
61 nbfd->memory = objalloc_create ();
62 if (nbfd->memory == NULL)
64 bfd_set_error (bfd_error_no_memory);
69 nbfd->arch_info = &bfd_default_arch_struct;
71 nbfd->direction = no_direction;
72 nbfd->iostream = NULL;
74 if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc,
75 sizeof (struct section_hash_entry), 251))
80 nbfd->sections = NULL;
81 nbfd->section_last = NULL;
82 nbfd->format = bfd_unknown;
83 nbfd->my_archive = NULL;
85 nbfd->opened_once = FALSE;
86 nbfd->output_has_begun = FALSE;
87 nbfd->section_count = 0;
89 nbfd->cacheable = FALSE;
90 nbfd->flags = BFD_NO_FLAGS;
91 nbfd->mtime_set = FALSE;
96 /* Allocate a new BFD as a member of archive OBFD. */
99 _bfd_new_bfd_contained_in (bfd *obfd)
103 nbfd = _bfd_new_bfd ();
106 nbfd->xvec = obfd->xvec;
107 nbfd->iovec = obfd->iovec;
108 nbfd->my_archive = obfd;
109 nbfd->direction = read_direction;
110 nbfd->target_defaulted = obfd->target_defaulted;
117 _bfd_delete_bfd (bfd *abfd)
121 bfd_hash_table_free (&abfd->section_htab);
122 objalloc_free ((struct objalloc *) abfd->memory);
127 /* Free objalloc memory. */
130 _bfd_free_cached_info (bfd *abfd)
134 bfd_hash_table_free (&abfd->section_htab);
135 objalloc_free ((struct objalloc *) abfd->memory);
137 abfd->sections = NULL;
138 abfd->section_last = NULL;
139 abfd->outsymbols = NULL;
140 abfd->tdata.any = NULL;
141 abfd->usrdata = NULL;
150 Opening and closing BFDs
153 Functions for opening and closing
161 bfd *bfd_fopen (const char *filename, const char *target,
162 const char *mode, int fd);
165 Open the file @var{filename} with the target @var{target}.
166 Return a pointer to the created BFD. If @var{fd} is not -1,
167 then <<fdopen>> is used to open the file; otherwise, <<fopen>>
168 is used. @var{mode} is passed directly to <<fopen>> or
171 Calls <<bfd_find_target>>, so @var{target} is interpreted as by
174 The new BFD is marked as cacheable iff @var{fd} is -1.
176 If <<NULL>> is returned then an error has occured. Possible errors
177 are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
178 <<system_call>> error.
182 bfd_fopen (const char *filename, const char *target, const char *mode, int fd)
185 const bfd_target *target_vec;
187 nbfd = _bfd_new_bfd ();
191 target_vec = bfd_find_target (target, nbfd);
192 if (target_vec == NULL)
194 _bfd_delete_bfd (nbfd);
200 nbfd->iostream = fdopen (fd, mode);
203 nbfd->iostream = real_fopen (filename, mode);
204 if (nbfd->iostream == NULL)
206 bfd_set_error (bfd_error_system_call);
207 _bfd_delete_bfd (nbfd);
211 /* OK, put everything where it belongs. */
212 nbfd->filename = filename;
214 /* Figure out whether the user is opening the file for reading,
215 writing, or both, by looking at the MODE argument. */
216 if ((mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a')
218 nbfd->direction = both_direction;
219 else if (mode[0] == 'r')
220 nbfd->direction = read_direction;
222 nbfd->direction = write_direction;
224 if (! bfd_cache_init (nbfd))
226 _bfd_delete_bfd (nbfd);
229 nbfd->opened_once = TRUE;
230 /* If we opened the file by name, mark it cacheable; we can close it
231 and reopen it later. However, if a file descriptor was provided,
232 then it may have been opened with special flags that make it
233 unsafe to close and reopen the file. */
235 bfd_set_cacheable (nbfd, TRUE);
245 bfd *bfd_openr (const char *filename, const char *target);
248 Open the file @var{filename} (using <<fopen>>) with the target
249 @var{target}. Return a pointer to the created BFD.
251 Calls <<bfd_find_target>>, so @var{target} is interpreted as by
254 If <<NULL>> is returned then an error has occured. Possible errors
255 are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
256 <<system_call>> error.
260 bfd_openr (const char *filename, const char *target)
262 return bfd_fopen (filename, target, FOPEN_RB, -1);
265 /* Don't try to `optimize' this function:
267 o - We lock using stack space so that interrupting the locking
268 won't cause a storage leak.
269 o - We open the file stream last, since we don't want to have to
270 close it if anything goes wrong. Closing the stream means closing
271 the file descriptor too, even though we didn't open it. */
277 bfd *bfd_fdopenr (const char *filename, const char *target, int fd);
280 <<bfd_fdopenr>> is to <<bfd_fopenr>> much like <<fdopen>> is to
281 <<fopen>>. It opens a BFD on a file already described by the
284 When the file is later <<bfd_close>>d, the file descriptor will
285 be closed. If the caller desires that this file descriptor be
286 cached by BFD (opened as needed, closed as needed to free
287 descriptors for other opens), with the supplied @var{fd} used as
288 an initial file descriptor (but subject to closure at any time),
289 call bfd_set_cacheable(bfd, 1) on the returned BFD. The default
290 is to assume no caching; the file descriptor will remain open
291 until <<bfd_close>>, and will not be affected by BFD operations
294 Possible errors are <<bfd_error_no_memory>>,
295 <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
299 bfd_fdopenr (const char *filename, const char *target, int fd)
302 #if defined(HAVE_FCNTL) && defined(F_GETFL)
306 #if ! defined(HAVE_FCNTL) || ! defined(F_GETFL)
307 mode = FOPEN_RUB; /* Assume full access. */
309 fdflags = fcntl (fd, F_GETFL, NULL);
312 bfd_set_error (bfd_error_system_call);
316 /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */
317 switch (fdflags & (O_ACCMODE))
319 case O_RDONLY: mode = FOPEN_RB; break;
320 case O_WRONLY: mode = FOPEN_RUB; break;
321 case O_RDWR: mode = FOPEN_RUB; break;
326 return bfd_fopen (filename, target, mode, fd);
334 bfd *bfd_openstreamr (const char *, const char *, void *);
338 Open a BFD for read access on an existing stdio stream. When
339 the BFD is passed to <<bfd_close>>, the stream will be closed.
343 bfd_openstreamr (const char *filename, const char *target, void *streamarg)
345 FILE *stream = streamarg;
347 const bfd_target *target_vec;
349 nbfd = _bfd_new_bfd ();
353 target_vec = bfd_find_target (target, nbfd);
354 if (target_vec == NULL)
356 _bfd_delete_bfd (nbfd);
360 nbfd->iostream = stream;
361 nbfd->filename = filename;
362 nbfd->direction = read_direction;
364 if (! bfd_cache_init (nbfd))
366 _bfd_delete_bfd (nbfd);
378 bfd *bfd_openr_iovec (const char *filename, const char *target,
379 void *(*open) (struct bfd *nbfd,
382 file_ptr (*pread) (struct bfd *nbfd,
387 int (*close) (struct bfd *nbfd,
389 int (*stat) (struct bfd *abfd,
395 Create and return a BFD backed by a read-only @var{stream}.
396 The @var{stream} is created using @var{open}, accessed using
397 @var{pread} and destroyed using @var{close}.
399 Calls <<bfd_find_target>>, so @var{target} is interpreted as by
402 Calls @var{open} (which can call <<bfd_zalloc>> and
403 <<bfd_get_filename>>) to obtain the read-only stream backing
404 the BFD. @var{open} either succeeds returning the
405 non-<<NULL>> @var{stream}, or fails returning <<NULL>>
406 (setting <<bfd_error>>).
408 Calls @var{pread} to request @var{nbytes} of data from
409 @var{stream} starting at @var{offset} (e.g., via a call to
410 <<bfd_read>>). @var{pread} either succeeds returning the
411 number of bytes read (which can be less than @var{nbytes} when
412 end-of-file), or fails returning -1 (setting <<bfd_error>>).
414 Calls @var{close} when the BFD is later closed using
415 <<bfd_close>>. @var{close} either succeeds returning 0, or
416 fails returning -1 (setting <<bfd_error>>).
418 Calls @var{stat} to fill in a stat structure for bfd_stat,
419 bfd_get_size, and bfd_get_mtime calls. @var{stat} returns 0
420 on success, or returns -1 on failure (setting <<bfd_error>>).
422 If <<bfd_openr_iovec>> returns <<NULL>> then an error has
423 occurred. Possible errors are <<bfd_error_no_memory>>,
424 <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
431 file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf,
432 file_ptr nbytes, file_ptr offset);
433 int (*close) (struct bfd *abfd, void *stream);
434 int (*stat) (struct bfd *abfd, void *stream, struct stat *sb);
439 opncls_btell (struct bfd *abfd)
441 struct opncls *vec = abfd->iostream;
446 opncls_bseek (struct bfd *abfd, file_ptr offset, int whence)
448 struct opncls *vec = abfd->iostream;
451 case SEEK_SET: vec->where = offset; break;
452 case SEEK_CUR: vec->where += offset; break;
453 case SEEK_END: return -1;
459 opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes)
461 struct opncls *vec = abfd->iostream;
462 file_ptr nread = (vec->pread) (abfd, vec->stream, buf, nbytes, vec->where);
470 opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED,
471 const void *where ATTRIBUTE_UNUSED,
472 file_ptr nbytes ATTRIBUTE_UNUSED)
478 opncls_bclose (struct bfd *abfd)
480 struct opncls *vec = abfd->iostream;
481 /* Since the VEC's memory is bound to the bfd deleting the bfd will
484 if (vec->close != NULL)
485 status = (vec->close) (abfd, vec->stream);
486 abfd->iostream = NULL;
491 opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED)
497 opncls_bstat (struct bfd *abfd, struct stat *sb)
499 struct opncls *vec = abfd->iostream;
501 memset (sb, 0, sizeof (*sb));
502 if (vec->stat == NULL)
505 return (vec->stat) (abfd, vec->stream, sb);
508 static const struct bfd_iovec opncls_iovec = {
509 &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek,
510 &opncls_bclose, &opncls_bflush, &opncls_bstat
514 bfd_openr_iovec (const char *filename, const char *target,
515 void *(*open) (struct bfd *nbfd,
518 file_ptr (*pread) (struct bfd *abfd,
523 int (*close) (struct bfd *nbfd,
525 int (*stat) (struct bfd *abfd,
530 const bfd_target *target_vec;
534 nbfd = _bfd_new_bfd ();
538 target_vec = bfd_find_target (target, nbfd);
539 if (target_vec == NULL)
541 _bfd_delete_bfd (nbfd);
545 nbfd->filename = filename;
546 nbfd->direction = read_direction;
548 /* `open (...)' would get expanded by an the open(2) syscall macro. */
549 stream = (*open) (nbfd, open_closure);
552 _bfd_delete_bfd (nbfd);
556 vec = bfd_zalloc (nbfd, sizeof (struct opncls));
557 vec->stream = stream;
562 nbfd->iovec = &opncls_iovec;
563 nbfd->iostream = vec;
568 /* bfd_openw -- open for writing.
569 Returns a pointer to a freshly-allocated BFD on success, or NULL.
571 See comment by bfd_fdopenr before you try to modify this function. */
578 bfd *bfd_openw (const char *filename, const char *target);
581 Create a BFD, associated with file @var{filename}, using the
582 file format @var{target}, and return a pointer to it.
584 Possible errors are <<bfd_error_system_call>>, <<bfd_error_no_memory>>,
585 <<bfd_error_invalid_target>>.
589 bfd_openw (const char *filename, const char *target)
592 const bfd_target *target_vec;
594 /* nbfd has to point to head of malloc'ed block so that bfd_close may
595 reclaim it correctly. */
596 nbfd = _bfd_new_bfd ();
600 target_vec = bfd_find_target (target, nbfd);
601 if (target_vec == NULL)
603 _bfd_delete_bfd (nbfd);
607 nbfd->filename = filename;
608 nbfd->direction = write_direction;
610 if (bfd_open_file (nbfd) == NULL)
612 /* File not writeable, etc. */
613 bfd_set_error (bfd_error_system_call);
614 _bfd_delete_bfd (nbfd);
627 bfd_boolean bfd_close (bfd *abfd);
631 Close a BFD. If the BFD was open for writing, then pending
632 operations are completed and the file written out and closed.
633 If the created file is executable, then <<chmod>> is called
636 All memory attached to the BFD is released.
638 The file descriptor associated with the BFD is closed (even
639 if it was passed in to BFD by <<bfd_fdopenr>>).
642 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
647 bfd_close (bfd *abfd)
651 if (bfd_write_p (abfd))
653 if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
657 if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
660 /* FIXME: cagney/2004-02-15: Need to implement a BFD_IN_MEMORY io
662 if (!(abfd->flags & BFD_IN_MEMORY))
663 ret = abfd->iovec->bclose (abfd);
667 /* If the file was open for writing and is now executable,
670 && abfd->direction == write_direction
671 && abfd->flags & EXEC_P)
675 if (stat (abfd->filename, &buf) == 0)
677 unsigned int mask = umask (0);
680 chmod (abfd->filename,
682 & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
686 _bfd_delete_bfd (abfd);
696 bfd_boolean bfd_close_all_done (bfd *);
699 Close a BFD. Differs from <<bfd_close>> since it does not
700 complete any pending operations. This routine would be used
701 if the application had just used BFD for swapping and didn't
702 want to use any of the writing code.
704 If the created file is executable, then <<chmod>> is called
707 All memory attached to the BFD is released.
710 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
714 bfd_close_all_done (bfd *abfd)
718 ret = bfd_cache_close (abfd);
720 /* If the file was open for writing and is now executable,
723 && abfd->direction == write_direction
724 && abfd->flags & EXEC_P)
728 if (stat (abfd->filename, &buf) == 0)
730 unsigned int mask = umask (0);
733 chmod (abfd->filename,
735 & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
739 _bfd_delete_bfd (abfd);
749 bfd *bfd_create (const char *filename, bfd *templ);
752 Create a new BFD in the manner of <<bfd_openw>>, but without
753 opening a file. The new BFD takes the target from the target
754 used by @var{template}. The format is always set to <<bfd_object>>.
758 bfd_create (const char *filename, bfd *templ)
762 nbfd = _bfd_new_bfd ();
765 nbfd->filename = filename;
767 nbfd->xvec = templ->xvec;
768 nbfd->direction = no_direction;
769 bfd_set_format (nbfd, bfd_object);
779 bfd_boolean bfd_make_writable (bfd *abfd);
782 Takes a BFD as created by <<bfd_create>> and converts it
783 into one like as returned by <<bfd_openw>>. It does this
784 by converting the BFD to BFD_IN_MEMORY. It's assumed that
785 you will call <<bfd_make_readable>> on this bfd later.
788 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
792 bfd_make_writable (bfd *abfd)
794 struct bfd_in_memory *bim;
796 if (abfd->direction != no_direction)
798 bfd_set_error (bfd_error_invalid_operation);
802 bim = bfd_malloc (sizeof (struct bfd_in_memory));
804 return FALSE; /* bfd_error already set. */
805 abfd->iostream = bim;
806 /* bfd_bwrite will grow these as needed. */
810 abfd->flags |= BFD_IN_MEMORY;
811 abfd->direction = write_direction;
822 bfd_boolean bfd_make_readable (bfd *abfd);
825 Takes a BFD as created by <<bfd_create>> and
826 <<bfd_make_writable>> and converts it into one like as
827 returned by <<bfd_openr>>. It does this by writing the
828 contents out to the memory buffer, then reversing the
832 <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. */
835 bfd_make_readable (bfd *abfd)
837 if (abfd->direction != write_direction || !(abfd->flags & BFD_IN_MEMORY))
839 bfd_set_error (bfd_error_invalid_operation);
843 if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
846 if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
850 abfd->arch_info = &bfd_default_arch_struct;
853 abfd->format = bfd_unknown;
854 abfd->my_archive = NULL;
856 abfd->opened_once = FALSE;
857 abfd->output_has_begun = FALSE;
858 abfd->section_count = 0;
859 abfd->usrdata = NULL;
860 abfd->cacheable = FALSE;
861 abfd->flags = BFD_IN_MEMORY;
862 abfd->mtime_set = FALSE;
864 abfd->target_defaulted = TRUE;
865 abfd->direction = read_direction;
868 abfd->outsymbols = 0;
871 bfd_section_list_clear (abfd);
872 bfd_check_format (abfd, bfd_object);
882 void *bfd_alloc (bfd *abfd, bfd_size_type wanted);
885 Allocate a block of @var{wanted} bytes of memory attached to
886 <<abfd>> and return a pointer to it.
890 bfd_alloc (bfd *abfd, bfd_size_type size)
894 if (size != (unsigned long) size)
896 bfd_set_error (bfd_error_no_memory);
900 ret = objalloc_alloc (abfd->memory, (unsigned long) size);
902 bfd_set_error (bfd_error_no_memory);
911 void *bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size);
914 Allocate a block of @var{nmemb} elements of @var{size} bytes each
915 of memory attached to <<abfd>> and return a pointer to it.
919 bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size)
923 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
925 && nmemb > ~(bfd_size_type) 0 / size)
927 bfd_set_error (bfd_error_no_memory);
933 if (size != (unsigned long) size)
935 bfd_set_error (bfd_error_no_memory);
939 ret = objalloc_alloc (abfd->memory, (unsigned long) size);
941 bfd_set_error (bfd_error_no_memory);
950 void *bfd_zalloc (bfd *abfd, bfd_size_type wanted);
953 Allocate a block of @var{wanted} bytes of zeroed memory
954 attached to <<abfd>> and return a pointer to it.
958 bfd_zalloc (bfd *abfd, bfd_size_type size)
962 res = bfd_alloc (abfd, size);
964 memset (res, 0, (size_t) size);
973 void *bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size);
976 Allocate a block of @var{nmemb} elements of @var{size} bytes each
977 of zeroed memory attached to <<abfd>> and return a pointer to it.
981 bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size)
985 if ((nmemb | size) >= HALF_BFD_SIZE_TYPE
987 && nmemb > ~(bfd_size_type) 0 / size)
989 bfd_set_error (bfd_error_no_memory);
995 res = bfd_alloc (abfd, size);
997 memset (res, 0, (size_t) size);
1001 /* Free a block allocated for a BFD.
1002 Note: Also frees all more recently allocated blocks! */
1005 bfd_release (bfd *abfd, void *block)
1007 objalloc_free_block ((struct objalloc *) abfd->memory, block);
1012 GNU Extension: separate debug-info files
1014 The idea here is that a special section called .gnu_debuglink might be
1015 embedded in a binary file, which indicates that some *other* file
1016 contains the real debugging information. This special section contains a
1017 filename and CRC32 checksum, which we read and resolve to another file,
1020 This facilitates "optional" provision of debugging information, without
1021 having to provide two complete copies of every binary object (with and
1022 without debug symbols).
1025 #define GNU_DEBUGLINK ".gnu_debuglink"
1028 bfd_calc_gnu_debuglink_crc32
1031 unsigned long bfd_calc_gnu_debuglink_crc32
1032 (unsigned long crc, const unsigned char *buf, bfd_size_type len);
1035 Computes a CRC value as used in the .gnu_debuglink section.
1036 Advances the previously computed @var{crc} value by computing
1037 and adding in the crc32 for @var{len} bytes of @var{buf}.
1040 Return the updated CRC32 value.
1044 bfd_calc_gnu_debuglink_crc32 (unsigned long crc,
1045 const unsigned char *buf,
1048 static const unsigned long crc32_table[256] =
1050 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
1051 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
1052 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
1053 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
1054 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
1055 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
1056 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
1057 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
1058 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
1059 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
1060 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
1061 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
1062 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
1063 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
1064 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
1065 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
1066 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
1067 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
1068 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
1069 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
1070 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
1071 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
1072 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
1073 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
1074 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
1075 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
1076 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
1077 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
1078 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
1079 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
1080 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
1081 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
1082 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
1083 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
1084 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
1085 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
1086 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
1087 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
1088 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
1089 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
1090 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
1091 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
1092 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
1093 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
1094 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
1095 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
1096 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
1097 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
1098 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
1099 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
1100 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
1103 const unsigned char *end;
1105 crc = ~crc & 0xffffffff;
1106 for (end = buf + len; buf < end; ++ buf)
1107 crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
1108 return ~crc & 0xffffffff;;
1117 char *get_debug_link_info (bfd *abfd, unsigned long *crc32_out);
1120 fetch the filename and CRC32 value for any separate debuginfo
1121 associated with @var{abfd}. Return NULL if no such info found,
1122 otherwise return filename and update @var{crc32_out}.
1126 get_debug_link_info (bfd *abfd, unsigned long *crc32_out)
1129 unsigned long crc32;
1135 BFD_ASSERT (crc32_out);
1137 sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
1142 if (!bfd_malloc_and_get_section (abfd, sect, &contents))
1144 if (contents != NULL)
1149 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1150 name = (char *) contents;
1151 crc_offset = strlen (name) + 1;
1152 crc_offset = (crc_offset + 3) & ~3;
1154 crc32 = bfd_get_32 (abfd, contents + crc_offset);
1162 separate_debug_file_exists
1165 bfd_boolean separate_debug_file_exists
1166 (char *name, unsigned long crc32);
1169 Checks to see if @var{name} is a file and if its contents
1174 separate_debug_file_exists (const char *name, const unsigned long crc)
1176 static unsigned char buffer [8 * 1024];
1177 unsigned long file_crc = 0;
1179 bfd_size_type count;
1183 f = real_fopen (name, FOPEN_RB);
1187 while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0)
1188 file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
1192 return crc == file_crc;
1198 find_separate_debug_file
1201 char *find_separate_debug_file (bfd *abfd);
1204 Searches @var{abfd} for a reference to separate debugging
1205 information, scans various locations in the filesystem, including
1206 the file tree rooted at @var{debug_file_directory}, and returns a
1207 filename of such debugging information if the file is found and has
1208 matching CRC32. Returns NULL if no reference to debugging file
1209 exists, or file cannot be found.
1213 find_separate_debug_file (bfd *abfd, const char *debug_file_directory)
1218 unsigned long crc32;
1223 if (debug_file_directory == NULL)
1224 debug_file_directory = ".";
1226 /* BFD may have been opened from a stream. */
1227 if (abfd->filename == NULL)
1229 bfd_set_error (bfd_error_invalid_operation);
1233 basename = get_debug_link_info (abfd, & crc32);
1234 if (basename == NULL)
1237 if (basename[0] == '\0')
1240 bfd_set_error (bfd_error_no_debug_section);
1244 for (dirlen = strlen (abfd->filename); dirlen > 0; dirlen--)
1245 if (IS_DIR_SEPARATOR (abfd->filename[dirlen - 1]))
1248 dir = bfd_malloc (dirlen + 1);
1254 memcpy (dir, abfd->filename, dirlen);
1257 debugfile = bfd_malloc (strlen (debug_file_directory) + 1
1259 + strlen (".debug/")
1262 if (debugfile == NULL)
1269 /* First try in the same directory as the original file: */
1270 strcpy (debugfile, dir);
1271 strcat (debugfile, basename);
1273 if (separate_debug_file_exists (debugfile, crc32))
1280 /* Then try in a subdirectory called .debug. */
1281 strcpy (debugfile, dir);
1282 strcat (debugfile, ".debug/");
1283 strcat (debugfile, basename);
1285 if (separate_debug_file_exists (debugfile, crc32))
1292 /* Then try in the global debugfile directory. */
1293 strcpy (debugfile, debug_file_directory);
1294 i = strlen (debug_file_directory) - 1;
1296 && debug_file_directory[i] != '/'
1298 strcat (debugfile, "/");
1299 strcat (debugfile, dir);
1300 strcat (debugfile, basename);
1302 if (separate_debug_file_exists (debugfile, crc32))
1318 bfd_follow_gnu_debuglink
1321 char *bfd_follow_gnu_debuglink (bfd *abfd, const char *dir);
1325 Takes a BFD and searches it for a .gnu_debuglink section. If this
1326 section is found, it examines the section for the name and checksum
1327 of a '.debug' file containing auxiliary debugging information. It
1328 then searches the filesystem for this .debug file in some standard
1329 locations, including the directory tree rooted at @var{dir}, and if
1330 found returns the full filename.
1332 If @var{dir} is NULL, it will search a default path configured into
1333 libbfd at build time. [XXX this feature is not currently
1337 <<NULL>> on any errors or failure to locate the .debug file,
1338 otherwise a pointer to a heap-allocated string containing the
1339 filename. The caller is responsible for freeing this string.
1343 bfd_follow_gnu_debuglink (bfd *abfd, const char *dir)
1345 return find_separate_debug_file (abfd, dir);
1350 bfd_create_gnu_debuglink_section
1353 struct bfd_section *bfd_create_gnu_debuglink_section
1354 (bfd *abfd, const char *filename);
1358 Takes a @var{BFD} and adds a .gnu_debuglink section to it. The section is sized
1359 to be big enough to contain a link to the specified @var{filename}.
1362 A pointer to the new section is returned if all is ok. Otherwise <<NULL>> is
1363 returned and bfd_error is set.
1367 bfd_create_gnu_debuglink_section (bfd *abfd, const char *filename)
1370 bfd_size_type debuglink_size;
1373 if (abfd == NULL || filename == NULL)
1375 bfd_set_error (bfd_error_invalid_operation);
1379 /* Strip off any path components in filename. */
1380 filename = lbasename (filename);
1382 sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
1385 /* Section already exists. */
1386 bfd_set_error (bfd_error_invalid_operation);
1390 flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING;
1391 sect = bfd_make_section_with_flags (abfd, GNU_DEBUGLINK, flags);
1395 debuglink_size = strlen (filename) + 1;
1396 debuglink_size += 3;
1397 debuglink_size &= ~3;
1398 debuglink_size += 4;
1400 if (! bfd_set_section_size (abfd, sect, debuglink_size))
1401 /* XXX Should we delete the section from the bfd ? */
1410 bfd_fill_in_gnu_debuglink_section
1413 bfd_boolean bfd_fill_in_gnu_debuglink_section
1414 (bfd *abfd, struct bfd_section *sect, const char *filename);
1418 Takes a @var{BFD} and containing a .gnu_debuglink section @var{SECT}
1419 and fills in the contents of the section to contain a link to the
1420 specified @var{filename}. The filename should be relative to the
1424 <<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned
1425 and bfd_error is set.
1429 bfd_fill_in_gnu_debuglink_section (bfd *abfd,
1430 struct bfd_section *sect,
1431 const char *filename)
1433 bfd_size_type debuglink_size;
1434 unsigned long crc32;
1436 bfd_size_type crc_offset;
1438 static unsigned char buffer[8 * 1024];
1442 if (abfd == NULL || sect == NULL || filename == NULL)
1444 bfd_set_error (bfd_error_invalid_operation);
1448 /* Make sure that we can read the file.
1449 XXX - Should we attempt to locate the debug info file using the same
1450 algorithm as gdb ? At the moment, since we are creating the
1451 .gnu_debuglink section, we insist upon the user providing us with a
1452 correct-for-section-creation-time path, but this need not conform to
1453 the gdb location algorithm. */
1454 handle = real_fopen (filename, FOPEN_RB);
1457 bfd_set_error (bfd_error_system_call);
1462 while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0)
1463 crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count);
1466 /* Strip off any path components in filename,
1467 now that we no longer need them. */
1468 filename = lbasename (filename);
1470 filelen = strlen (filename);
1471 debuglink_size = filelen + 1;
1472 debuglink_size += 3;
1473 debuglink_size &= ~3;
1474 debuglink_size += 4;
1476 contents = bfd_malloc (debuglink_size);
1477 if (contents == NULL)
1479 /* XXX Should we delete the section from the bfd ? */
1483 crc_offset = debuglink_size - 4;
1484 memcpy (contents, filename, filelen);
1485 memset (contents + filelen, 0, crc_offset - filelen);
1487 bfd_put_32 (abfd, crc32, contents + crc_offset);
1489 if (! bfd_set_section_contents (abfd, sect, contents, 0, debuglink_size))
1491 /* XXX Should we delete the section from the bfd ? */