/* opncls.c -- open and close a BFD.
- Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 1997
- Free Software Foundation, Inc.
+ Copyright (C) 1990-2020 Free Software Foundation, Inc.
Written by Cygnus Support.
-This file is part of BFD, the Binary File Descriptor library.
+ This file is part of BFD, the Binary File Descriptor library.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "objalloc.h"
#include "libbfd.h"
+#include "libiberty.h"
+#include "elf-bfd.h"
#ifndef S_IXUSR
#define S_IXUSR 0100 /* Execute by owner. */
#define S_IXOTH 0001 /* Execute by others. */
#endif
+/* Counters used to initialize the bfd identifier. */
+
+static unsigned int bfd_id_counter = 0;
+static unsigned int bfd_reserved_id_counter = 0;
+
+/*
+CODE_FRAGMENT
+.{* Set to N to open the next N BFDs using an alternate id space. *}
+.extern unsigned int bfd_use_reserved_id;
+*/
+unsigned int bfd_use_reserved_id = 0;
+
/* fdopen is a loser -- we should use stdio exclusively. Unfortunately
if we do that we can't use fcntl. */
-/* FIXME: This is no longer used. */
-long _bfd_chunksize = -1;
-
/* Return a new BFD. All BFD's are allocated through this routine. */
bfd *
-_bfd_new_bfd ()
+_bfd_new_bfd (void)
{
bfd *nbfd;
if (nbfd == NULL)
return NULL;
- nbfd->memory = (PTR) objalloc_create ();
+ if (bfd_use_reserved_id)
+ {
+ nbfd->id = --bfd_reserved_id_counter;
+ --bfd_use_reserved_id;
+ }
+ else
+ nbfd->id = bfd_id_counter++;
+
+ nbfd->memory = objalloc_create ();
if (nbfd->memory == NULL)
{
bfd_set_error (bfd_error_no_memory);
+ free (nbfd);
return NULL;
}
nbfd->arch_info = &bfd_default_arch_struct;
- nbfd->direction = no_direction;
- nbfd->iostream = NULL;
- nbfd->where = 0;
- nbfd->sections = (asection *) NULL;
- nbfd->format = bfd_unknown;
- nbfd->my_archive = (bfd *) NULL;
- nbfd->origin = 0;
- nbfd->opened_once = false;
- nbfd->output_has_begun = false;
- nbfd->section_count = 0;
- nbfd->usrdata = (PTR) NULL;
- nbfd->cacheable = false;
- nbfd->flags = BFD_NO_FLAGS;
- nbfd->mtime_set = false;
+ if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc,
+ sizeof (struct section_hash_entry), 13))
+ {
+ objalloc_free ((struct objalloc *) nbfd->memory);
+ free (nbfd);
+ return NULL;
+ }
return nbfd;
}
+static const struct bfd_iovec opncls_iovec;
+
/* Allocate a new BFD as a member of archive OBFD. */
bfd *
-_bfd_new_bfd_contained_in (obfd)
- bfd *obfd;
+_bfd_new_bfd_contained_in (bfd *obfd)
{
bfd *nbfd;
nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ return NULL;
nbfd->xvec = obfd->xvec;
+ nbfd->iovec = obfd->iovec;
+ if (obfd->iovec == &opncls_iovec)
+ nbfd->iostream = obfd->iostream;
nbfd->my_archive = obfd;
nbfd->direction = read_direction;
nbfd->target_defaulted = obfd->target_defaulted;
+ nbfd->lto_output = obfd->lto_output;
+ nbfd->no_export = obfd->no_export;
return nbfd;
}
+/* Delete a BFD. */
+
+static void
+_bfd_delete_bfd (bfd *abfd)
+{
+ if (abfd->memory)
+ {
+ bfd_hash_table_free (&abfd->section_htab);
+ objalloc_free ((struct objalloc *) abfd->memory);
+ }
+ else
+ free ((char *) bfd_get_filename (abfd));
+
+ free (abfd->arelt_data);
+ free (abfd);
+}
+
+/* Free objalloc memory. */
+
+bfd_boolean
+_bfd_free_cached_info (bfd *abfd)
+{
+ if (abfd->memory)
+ {
+ const char *filename = bfd_get_filename (abfd);
+ if (filename)
+ {
+ /* We can't afford to lose the bfd filename when freeing
+ abfd->memory, because that would kill the cache.c scheme
+ of closing and reopening files in order to limit the
+ number of open files. To reopen, you need the filename.
+ And indeed _bfd_compute_and_write_armap calls
+ _bfd_free_cached_info to free up space used by symbols
+ and by check_format_matches. Which we want to continue
+ doing to handle very large archives. Later the archive
+ elements are copied, which might require reopening files.
+ We also want to keep using objalloc memory for the
+ filename since that allows the name to be updated
+ without either leaking memory or implementing some sort
+ of reference counted string for copies of the filename. */
+ size_t len = strlen (filename) + 1;
+ char *copy = bfd_malloc (len);
+ if (copy == NULL)
+ return FALSE;
+ memcpy (copy, filename, len);
+ abfd->filename = copy;
+ }
+ bfd_hash_table_free (&abfd->section_htab);
+ objalloc_free ((struct objalloc *) abfd->memory);
+
+ abfd->sections = NULL;
+ abfd->section_last = NULL;
+ abfd->outsymbols = NULL;
+ abfd->tdata.any = NULL;
+ abfd->usrdata = NULL;
+ abfd->memory = NULL;
+ }
+
+ return TRUE;
+}
+
/*
SECTION
Opening and closing BFDs
+SUBSECTION
+ Functions for opening and closing
*/
/*
FUNCTION
- bfd_openr
+ bfd_fopen
SYNOPSIS
- bfd *bfd_openr(CONST char *filename, CONST char *target);
+ bfd *bfd_fopen (const char *filename, const char *target,
+ const char *mode, int fd);
DESCRIPTION
- Open the file @var{filename} (using <<fopen>>) with the target
- @var{target}. Return a pointer to the created BFD.
+ Open the file @var{filename} with the target @var{target}.
+ Return a pointer to the created BFD. If @var{fd} is not -1,
+ then <<fdopen>> is used to open the file; otherwise, <<fopen>>
+ is used. @var{mode} is passed directly to <<fopen>> or
+ <<fdopen>>.
Calls <<bfd_find_target>>, so @var{target} is interpreted as by
that function.
+ The new BFD is marked as cacheable iff @var{fd} is -1.
+
If <<NULL>> is returned then an error has occured. Possible errors
- are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or <<system_call>> error.
+ are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
+ <<system_call>> error.
+
+ On error, @var{fd} is always closed.
+
+ A copy of the @var{filename} argument is stored in the newly created
+ BFD. It can be accessed via the bfd_get_filename() macro.
*/
bfd *
-bfd_openr (filename, target)
- CONST char *filename;
- CONST char *target;
+bfd_fopen (const char *filename, const char *target, const char *mode, int fd)
{
bfd *nbfd;
const bfd_target *target_vec;
nbfd = _bfd_new_bfd ();
if (nbfd == NULL)
- return NULL;
+ {
+ if (fd != -1)
+ close (fd);
+ return NULL;
+ }
target_vec = bfd_find_target (target, nbfd);
if (target_vec == NULL)
{
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
- bfd_set_error (bfd_error_invalid_target);
+ if (fd != -1)
+ close (fd);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
- nbfd->filename = filename;
- nbfd->direction = read_direction;
-
- if (bfd_open_file (nbfd) == NULL)
+#ifdef HAVE_FDOPEN
+ if (fd != -1)
+ nbfd->iostream = fdopen (fd, mode);
+ else
+#endif
+ nbfd->iostream = _bfd_real_fopen (filename, mode);
+ if (nbfd->iostream == NULL)
{
- /* File didn't exist, or some such */
bfd_set_error (bfd_error_system_call);
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ if (fd != -1)
+ close (fd);
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ /* OK, put everything where it belongs. */
+
+ /* PR 11983: Do not cache the original filename, but
+ rather make a copy - the original might go away. */
+ if (!bfd_set_filename (nbfd, filename))
+ {
+ fclose (nbfd->iostream);
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ /* Figure out whether the user is opening the file for reading,
+ writing, or both, by looking at the MODE argument. */
+ if ((mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a')
+ && mode[1] == '+')
+ nbfd->direction = both_direction;
+ else if (mode[0] == 'r')
+ nbfd->direction = read_direction;
+ else
+ nbfd->direction = write_direction;
+
+ if (!bfd_cache_init (nbfd))
+ {
+ fclose (nbfd->iostream);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
+ nbfd->opened_once = TRUE;
+
+ /* If we opened the file by name, mark it cacheable; we can close it
+ and reopen it later. However, if a file descriptor was provided,
+ then it may have been opened with special flags that make it
+ unsafe to close and reopen the file. */
+ if (fd == -1)
+ (void) bfd_set_cacheable (nbfd, TRUE);
return nbfd;
}
+/*
+FUNCTION
+ bfd_openr
+
+SYNOPSIS
+ bfd *bfd_openr (const char *filename, const char *target);
+
+DESCRIPTION
+ Open the file @var{filename} (using <<fopen>>) with the target
+ @var{target}. Return a pointer to the created BFD.
+
+ Calls <<bfd_find_target>>, so @var{target} is interpreted as by
+ that function.
+
+ If <<NULL>> is returned then an error has occured. Possible errors
+ are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or
+ <<system_call>> error.
+
+ A copy of the @var{filename} argument is stored in the newly created
+ BFD. It can be accessed via the bfd_get_filename() macro.
+*/
+
+bfd *
+bfd_openr (const char *filename, const char *target)
+{
+ return bfd_fopen (filename, target, FOPEN_RB, -1);
+}
+
/* Don't try to `optimize' this function:
o - We lock using stack space so that interrupting the locking
won't cause a storage leak.
o - We open the file stream last, since we don't want to have to
close it if anything goes wrong. Closing the stream means closing
- the file descriptor too, even though we didn't open it.
- */
+ the file descriptor too, even though we didn't open it. */
/*
FUNCTION
- bfd_fdopenr
+ bfd_fdopenr
SYNOPSIS
- bfd *bfd_fdopenr(CONST char *filename, CONST char *target, int fd);
+ bfd *bfd_fdopenr (const char *filename, const char *target, int fd);
DESCRIPTION
- <<bfd_fdopenr>> is to <<bfd_fopenr>> much like <<fdopen>> is to <<fopen>>.
- It opens a BFD on a file already described by the @var{fd}
- supplied.
-
- When the file is later <<bfd_close>>d, the file descriptor will be closed.
-
- If the caller desires that this file descriptor be cached by BFD
- (opened as needed, closed as needed to free descriptors for
- other opens), with the supplied @var{fd} used as an initial
- file descriptor (but subject to closure at any time), call
- bfd_set_cacheable(bfd, 1) on the returned BFD. The default is to
- assume no cacheing; the file descriptor will remain open until
- <<bfd_close>>, and will not be affected by BFD operations on other
- files.
-
- Possible errors are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
+ <<bfd_fdopenr>> is to <<bfd_fopenr>> much like <<fdopen>> is to
+ <<fopen>>. It opens a BFD on a file already described by the
+ @var{fd} supplied.
+
+ When the file is later <<bfd_close>>d, the file descriptor will
+ be closed. If the caller desires that this file descriptor be
+ cached by BFD (opened as needed, closed as needed to free
+ descriptors for other opens), with the supplied @var{fd} used as
+ an initial file descriptor (but subject to closure at any time),
+ call bfd_set_cacheable(bfd, 1) on the returned BFD. The default
+ is to assume no caching; the file descriptor will remain open
+ until <<bfd_close>>, and will not be affected by BFD operations
+ on other files.
+
+ Possible errors are <<bfd_error_no_memory>>,
+ <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
+
+ On error, @var{fd} is closed.
+
+ A copy of the @var{filename} argument is stored in the newly created
+ BFD. It can be accessed via the bfd_get_filename() macro.
*/
bfd *
-bfd_fdopenr (filename, target, fd)
- CONST char *filename;
- CONST char *target;
- int fd;
+bfd_fdopenr (const char *filename, const char *target, int fd)
{
- bfd *nbfd;
- const bfd_target *target_vec;
+ const char *mode;
+#if defined(HAVE_FCNTL) && defined(F_GETFL)
int fdflags;
+#endif
- bfd_set_error (bfd_error_system_call);
#if ! defined(HAVE_FCNTL) || ! defined(F_GETFL)
- fdflags = O_RDWR; /* Assume full access */
+ mode = FOPEN_RUB; /* Assume full access. */
#else
fdflags = fcntl (fd, F_GETFL, NULL);
-#endif
- if (fdflags == -1) return NULL;
-
- nbfd = _bfd_new_bfd ();
- if (nbfd == NULL)
- return NULL;
-
- target_vec = bfd_find_target (target, nbfd);
- if (target_vec == NULL)
+ if (fdflags == -1)
{
- bfd_set_error (bfd_error_invalid_target);
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ int save = errno;
+
+ close (fd);
+ errno = save;
+ bfd_set_error (bfd_error_system_call);
return NULL;
}
-#ifndef HAVE_FDOPEN
- nbfd->iostream = (PTR) fopen (filename, FOPEN_RB);
-#else
- /* (O_ACCMODE) parens are to avoid Ultrix header file bug */
+ /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */
switch (fdflags & (O_ACCMODE))
{
- case O_RDONLY: nbfd->iostream = (PTR) fdopen (fd, FOPEN_RB); break;
- case O_WRONLY: nbfd->iostream = (PTR) fdopen (fd, FOPEN_RUB); break;
- case O_RDWR: nbfd->iostream = (PTR) fdopen (fd, FOPEN_RUB); break;
+ case O_RDONLY: mode = FOPEN_RB; break;
+ case O_WRONLY: mode = FOPEN_RUB; break;
+ case O_RDWR: mode = FOPEN_RUB; break;
default: abort ();
}
#endif
- if (nbfd->iostream == NULL)
+ return bfd_fopen (filename, target, mode, fd);
+}
+
+/*
+FUNCTION
+ bfd_openstreamr
+
+SYNOPSIS
+ bfd *bfd_openstreamr (const char * filename, const char * target,
+ void * stream);
+
+DESCRIPTION
+ Open a BFD for read access on an existing stdio stream. When
+ the BFD is passed to <<bfd_close>>, the stream will be closed.
+
+ A copy of the @var{filename} argument is stored in the newly created
+ BFD. It can be accessed via the bfd_get_filename() macro.
+*/
+
+bfd *
+bfd_openstreamr (const char *filename, const char *target, void *streamarg)
+{
+ FILE *stream = (FILE *) streamarg;
+ bfd *nbfd;
+ const bfd_target *target_vec;
+
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ return NULL;
+
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL)
{
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
- /* OK, put everything where it belongs */
-
- nbfd->filename = filename;
-
- /* As a special case we allow a FD open for read/write to
- be written through, although doing so requires that we end
- the previous clause with a preposition. */
- /* (O_ACCMODE) parens are to avoid Ultrix header file bug */
- switch (fdflags & O_ACCMODE)
+ nbfd->iostream = stream;
+ /* PR 11983: Do not cache the original filename, but
+ rather make a copy - the original might go away. */
+ if (!bfd_set_filename (nbfd, filename))
{
- case O_RDONLY: nbfd->direction = read_direction; break;
- case O_WRONLY: nbfd->direction = write_direction; break;
- case O_RDWR: nbfd->direction = both_direction; break;
- default: abort ();
+ _bfd_delete_bfd (nbfd);
+ return NULL;
}
+ nbfd->direction = read_direction;
if (! bfd_cache_init (nbfd))
{
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
- nbfd->opened_once = true;
return nbfd;
}
/*
FUNCTION
- bfd_openstreamr
+ bfd_openr_iovec
SYNOPSIS
- bfd *bfd_openstreamr(const char *, const char *, PTR);
+ bfd *bfd_openr_iovec (const char *filename, const char *target,
+ void *(*open_func) (struct bfd *nbfd,
+ void *open_closure),
+ void *open_closure,
+ file_ptr (*pread_func) (struct bfd *nbfd,
+ void *stream,
+ void *buf,
+ file_ptr nbytes,
+ file_ptr offset),
+ int (*close_func) (struct bfd *nbfd,
+ void *stream),
+ int (*stat_func) (struct bfd *abfd,
+ void *stream,
+ struct stat *sb));
DESCRIPTION
+ Create and return a BFD backed by a read-only @var{stream}.
+ The @var{stream} is created using @var{open_func}, accessed using
+ @var{pread_func} and destroyed using @var{close_func}.
- Open a BFD for read access on an existing stdio stream. When
- the BFD is passed to <<bfd_close>>, the stream will be closed.
+ Calls <<bfd_find_target>>, so @var{target} is interpreted as by
+ that function.
+
+ Calls @var{open_func} (which can call <<bfd_zalloc>> and
+ <<bfd_get_filename>>) to obtain the read-only stream backing
+ the BFD. @var{open_func} either succeeds returning the
+ non-<<NULL>> @var{stream}, or fails returning <<NULL>>
+ (setting <<bfd_error>>).
+
+ Calls @var{pread_func} to request @var{nbytes} of data from
+ @var{stream} starting at @var{offset} (e.g., via a call to
+ <<bfd_read>>). @var{pread_func} either succeeds returning the
+ number of bytes read (which can be less than @var{nbytes} when
+ end-of-file), or fails returning -1 (setting <<bfd_error>>).
+
+ Calls @var{close_func} when the BFD is later closed using
+ <<bfd_close>>. @var{close_func} either succeeds returning 0, or
+ fails returning -1 (setting <<bfd_error>>).
+
+ Calls @var{stat_func} to fill in a stat structure for bfd_stat,
+ bfd_get_size, and bfd_get_mtime calls. @var{stat_func} returns 0
+ on success, or returns -1 on failure (setting <<bfd_error>>).
+
+ If <<bfd_openr_iovec>> returns <<NULL>> then an error has
+ occurred. Possible errors are <<bfd_error_no_memory>>,
+ <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
+
+ A copy of the @var{filename} argument is stored in the newly created
+ BFD. It can be accessed via the bfd_get_filename() macro.
*/
+struct opncls
+{
+ void *stream;
+ file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf,
+ file_ptr nbytes, file_ptr offset);
+ int (*close) (struct bfd *abfd, void *stream);
+ int (*stat) (struct bfd *abfd, void *stream, struct stat *sb);
+ file_ptr where;
+};
+
+static file_ptr
+opncls_btell (struct bfd *abfd)
+{
+ struct opncls *vec = (struct opncls *) abfd->iostream;
+ return vec->where;
+}
+
+static int
+opncls_bseek (struct bfd *abfd, file_ptr offset, int whence)
+{
+ struct opncls *vec = (struct opncls *) abfd->iostream;
+ switch (whence)
+ {
+ case SEEK_SET: vec->where = offset; break;
+ case SEEK_CUR: vec->where += offset; break;
+ case SEEK_END: return -1;
+ }
+ return 0;
+}
+
+static file_ptr
+opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes)
+{
+ struct opncls *vec = (struct opncls *) abfd->iostream;
+ file_ptr nread = (vec->pread) (abfd, vec->stream, buf, nbytes, vec->where);
+
+ if (nread < 0)
+ return nread;
+ vec->where += nread;
+ return nread;
+}
+
+static file_ptr
+opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED,
+ const void *where ATTRIBUTE_UNUSED,
+ file_ptr nbytes ATTRIBUTE_UNUSED)
+{
+ return -1;
+}
+
+static int
+opncls_bclose (struct bfd *abfd)
+{
+ struct opncls *vec = (struct opncls *) abfd->iostream;
+ /* Since the VEC's memory is bound to the bfd deleting the bfd will
+ free it. */
+ int status = 0;
+
+ if (vec->close != NULL)
+ status = (vec->close) (abfd, vec->stream);
+ abfd->iostream = NULL;
+ return status;
+}
+
+static int
+opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+static int
+opncls_bstat (struct bfd *abfd, struct stat *sb)
+{
+ struct opncls *vec = (struct opncls *) abfd->iostream;
+
+ memset (sb, 0, sizeof (*sb));
+ if (vec->stat == NULL)
+ return 0;
+
+ return (vec->stat) (abfd, vec->stream, sb);
+}
+
+static void *
+opncls_bmmap (struct bfd *abfd ATTRIBUTE_UNUSED,
+ void *addr ATTRIBUTE_UNUSED,
+ bfd_size_type len ATTRIBUTE_UNUSED,
+ int prot ATTRIBUTE_UNUSED,
+ int flags ATTRIBUTE_UNUSED,
+ file_ptr offset ATTRIBUTE_UNUSED,
+ void **map_addr ATTRIBUTE_UNUSED,
+ bfd_size_type *map_len ATTRIBUTE_UNUSED)
+{
+ return (void *) -1;
+}
+
+static const struct bfd_iovec opncls_iovec =
+{
+ &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek,
+ &opncls_bclose, &opncls_bflush, &opncls_bstat, &opncls_bmmap
+};
+
bfd *
-bfd_openstreamr (filename, target, streamarg)
- const char *filename;
- const char *target;
- PTR streamarg;
+bfd_openr_iovec (const char *filename, const char *target,
+ void *(*open_p) (struct bfd *, void *),
+ void *open_closure,
+ file_ptr (*pread_p) (struct bfd *, void *, void *,
+ file_ptr, file_ptr),
+ int (*close_p) (struct bfd *, void *),
+ int (*stat_p) (struct bfd *, void *, struct stat *))
{
- FILE *stream = (FILE *) streamarg;
bfd *nbfd;
const bfd_target *target_vec;
+ struct opncls *vec;
+ void *stream;
nbfd = _bfd_new_bfd ();
if (nbfd == NULL)
target_vec = bfd_find_target (target, nbfd);
if (target_vec == NULL)
{
- bfd_set_error (bfd_error_invalid_target);
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
- nbfd->iostream = (PTR) stream;
- nbfd->filename = filename;
+ /* PR 11983: Do not cache the original filename, but
+ rather make a copy - the original might go away. */
+ if (!bfd_set_filename (nbfd, filename))
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
nbfd->direction = read_direction;
-
- if (! bfd_cache_init (nbfd))
+
+ /* `open_p (...)' would get expanded by an the open(2) syscall macro. */
+ stream = (*open_p) (nbfd, open_closure);
+ if (stream == NULL)
{
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
+ vec = (struct opncls *) bfd_zalloc (nbfd, sizeof (struct opncls));
+ vec->stream = stream;
+ vec->pread = pread_p;
+ vec->close = close_p;
+ vec->stat = stat_p;
+
+ nbfd->iovec = &opncls_iovec;
+ nbfd->iostream = vec;
+
return nbfd;
}
\f
-/** bfd_openw -- open for writing.
- Returns a pointer to a freshly-allocated BFD on success, or NULL.
+/* bfd_openw -- open for writing.
+ Returns a pointer to a freshly-allocated BFD on success, or NULL.
- See comment by bfd_fdopenr before you try to modify this function. */
+ See comment by bfd_fdopenr before you try to modify this function. */
/*
FUNCTION
bfd_openw
SYNOPSIS
- bfd *bfd_openw(CONST char *filename, CONST char *target);
+ bfd *bfd_openw (const char *filename, const char *target);
DESCRIPTION
Create a BFD, associated with file @var{filename}, using the
Possible errors are <<bfd_error_system_call>>, <<bfd_error_no_memory>>,
<<bfd_error_invalid_target>>.
+
+ A copy of the @var{filename} argument is stored in the newly created
+ BFD. It can be accessed via the bfd_get_filename() macro.
*/
bfd *
-bfd_openw (filename, target)
- CONST char *filename;
- CONST char *target;
+bfd_openw (const char *filename, const char *target)
{
bfd *nbfd;
const bfd_target *target_vec;
- bfd_set_error (bfd_error_system_call);
-
/* nbfd has to point to head of malloc'ed block so that bfd_close may
- reclaim it correctly. */
-
+ reclaim it correctly. */
nbfd = _bfd_new_bfd ();
if (nbfd == NULL)
return NULL;
target_vec = bfd_find_target (target, nbfd);
if (target_vec == NULL)
{
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
- nbfd->filename = filename;
+ /* PR 11983: Do not cache the original filename, but
+ rather make a copy - the original might go away. */
+ if (!bfd_set_filename (nbfd, filename))
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
nbfd->direction = write_direction;
if (bfd_open_file (nbfd) == NULL)
{
- bfd_set_error (bfd_error_system_call); /* File not writeable, etc */
- objalloc_free ((struct objalloc *) nbfd->memory);
- free (nbfd);
+ /* File not writeable, etc. */
+ bfd_set_error (bfd_error_system_call);
+ _bfd_delete_bfd (nbfd);
return NULL;
}
return nbfd;
}
-/*
+static inline void
+_maybe_make_executable (bfd * abfd)
+{
+ /* If the file was open for writing and is now executable,
+ make it so. */
+ if (abfd->direction == write_direction
+ && (abfd->flags & (EXEC_P | DYNAMIC)) != 0)
+ {
+ struct stat buf;
+
+ if (stat (bfd_get_filename (abfd), &buf) == 0
+ /* Do not attempt to change non-regular files. This is
+ here especially for configure scripts and kernel builds
+ which run tests with "ld [...] -o /dev/null". */
+ && S_ISREG(buf.st_mode))
+ {
+ unsigned int mask = umask (0);
+
+ umask (mask);
+ chmod (bfd_get_filename (abfd),
+ (0777
+ & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
+ }
+ }
+}
+/*
FUNCTION
bfd_close
SYNOPSIS
- boolean bfd_close(bfd *abfd);
+ bfd_boolean bfd_close (bfd *abfd);
DESCRIPTION
-
- Close a BFD. If the BFD was open for writing,
- then pending operations are completed and the file written out
- and closed. If the created file is executable, then
- <<chmod>> is called to mark it as such.
+ Close a BFD. If the BFD was open for writing, then pending
+ operations are completed and the file written out and closed.
+ If the created file is executable, then <<chmod>> is called
+ to mark it as such.
All memory attached to the BFD is released.
if it was passed in to BFD by <<bfd_fdopenr>>).
RETURNS
- <<true>> is returned if all is ok, otherwise <<false>>.
+ <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
*/
-
-boolean
-bfd_close (abfd)
- bfd *abfd;
+bfd_boolean
+bfd_close (bfd *abfd)
{
- boolean ret;
-
- if (!bfd_read_p (abfd))
+ if (bfd_write_p (abfd))
{
if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
- return false;
- }
-
- if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
- return false;
-
- ret = bfd_cache_close (abfd);
-
- /* If the file was open for writing and is now executable,
- make it so */
- if (ret
- && abfd->direction == write_direction
- && abfd->flags & EXEC_P)
- {
- struct stat buf;
-
- if (stat (abfd->filename, &buf) == 0)
- {
- int mask = umask (0);
- umask (mask);
- chmod (abfd->filename,
- (0777
- & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
- }
+ return FALSE;
}
- objalloc_free ((struct objalloc *) abfd->memory);
- free (abfd);
-
- return ret;
+ return bfd_close_all_done (abfd);
}
/*
bfd_close_all_done
SYNOPSIS
- boolean bfd_close_all_done(bfd *);
+ bfd_boolean bfd_close_all_done (bfd *);
DESCRIPTION
- Close a BFD. Differs from <<bfd_close>>
- since it does not complete any pending operations. This
- routine would be used if the application had just used BFD for
- swapping and didn't want to use any of the writing code.
+ Close a BFD. Differs from <<bfd_close>> since it does not
+ complete any pending operations. This routine would be used
+ if the application had just used BFD for swapping and didn't
+ want to use any of the writing code.
If the created file is executable, then <<chmod>> is called
to mark it as such.
All memory attached to the BFD is released.
RETURNS
- <<true>> is returned if all is ok, otherwise <<false>>.
-
+ <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
*/
-boolean
-bfd_close_all_done (abfd)
- bfd *abfd;
+bfd_boolean
+bfd_close_all_done (bfd *abfd)
{
- boolean ret;
+ bfd_boolean ret;
- ret = bfd_cache_close (abfd);
+ if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
+ return FALSE;
- /* If the file was open for writing and is now executable,
- make it so */
- if (ret
- && abfd->direction == write_direction
- && abfd->flags & EXEC_P)
- {
- struct stat buf;
+ ret = abfd->iovec->bclose (abfd) == 0;
- if (stat (abfd->filename, &buf) == 0)
- {
- int mask = umask (0);
- umask (mask);
- chmod (abfd->filename,
- (0x777
- & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
- }
- }
+ if (ret)
+ _maybe_make_executable (abfd);
- objalloc_free ((struct objalloc *) abfd->memory);
- free (abfd);
+ _bfd_delete_bfd (abfd);
return ret;
}
bfd_create
SYNOPSIS
- bfd *bfd_create(CONST char *filename, bfd *templ);
+ bfd *bfd_create (const char *filename, bfd *templ);
DESCRIPTION
- Create a new BFD in the manner of
- <<bfd_openw>>, but without opening a file. The new BFD
- takes the target from the target used by @var{template}. The
- format is always set to <<bfd_object>>.
+ Create a new BFD in the manner of <<bfd_openw>>, but without
+ opening a file. The new BFD takes the target from the target
+ used by @var{templ}. The format is always set to <<bfd_object>>.
+ A copy of the @var{filename} argument is stored in the newly created
+ BFD. It can be accessed via the bfd_get_filename() macro.
*/
bfd *
-bfd_create (filename, templ)
- CONST char *filename;
- bfd *templ;
+bfd_create (const char *filename, bfd *templ)
{
bfd *nbfd;
nbfd = _bfd_new_bfd ();
if (nbfd == NULL)
return NULL;
- nbfd->filename = filename;
- if (templ)
- nbfd->xvec = templ->xvec;
+ /* PR 11983: Do not cache the original filename, but
+ rather make a copy - the original might go away. */
+ if (!bfd_set_filename (nbfd, filename))
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+ if (templ)
+ nbfd->xvec = templ->xvec;
nbfd->direction = no_direction;
bfd_set_format (nbfd, bfd_object);
+
return nbfd;
}
bfd_make_writable
SYNOPSIS
- boolean bfd_make_writable(bfd *abfd);
+ bfd_boolean bfd_make_writable (bfd *abfd);
DESCRIPTION
Takes a BFD as created by <<bfd_create>> and converts it
you will call <<bfd_make_readable>> on this bfd later.
RETURNS
- <<true>> is returned if all is ok, otherwise <<false>>.
+ <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
*/
-boolean
-bfd_make_writable(abfd)
- bfd *abfd;
+bfd_boolean
+bfd_make_writable (bfd *abfd)
{
struct bfd_in_memory *bim;
if (abfd->direction != no_direction)
{
bfd_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
}
bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory));
- abfd->iostream = (PTR) bim;
- /* bfd_write will grow these as needed */
+ if (bim == NULL)
+ return FALSE; /* bfd_error already set. */
+ abfd->iostream = bim;
+ /* bfd_bwrite will grow these as needed. */
bim->size = 0;
bim->buffer = 0;
abfd->flags |= BFD_IN_MEMORY;
+ abfd->iovec = &_bfd_memory_iovec;
+ abfd->origin = 0;
abfd->direction = write_direction;
abfd->where = 0;
- return true;
+ return TRUE;
}
/*
bfd_make_readable
SYNOPSIS
- boolean bfd_make_readable(bfd *abfd);
+ bfd_boolean bfd_make_readable (bfd *abfd);
DESCRIPTION
Takes a BFD as created by <<bfd_create>> and
direction.
RETURNS
- <<true>> is returned if all is ok, otherwise <<false>>. */
+ <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. */
-boolean
-bfd_make_readable(abfd)
- bfd *abfd;
+bfd_boolean
+bfd_make_readable (bfd *abfd)
{
if (abfd->direction != write_direction || !(abfd->flags & BFD_IN_MEMORY))
{
bfd_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
}
if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
- return false;
+ return FALSE;
if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
- return false;
-
+ return FALSE;
abfd->arch_info = &bfd_default_arch_struct;
abfd->where = 0;
- abfd->sections = (asection *) NULL;
abfd->format = bfd_unknown;
- abfd->my_archive = (bfd *) NULL;
- abfd->origin = 0;
- abfd->opened_once = false;
- abfd->output_has_begun = false;
+ abfd->my_archive = NULL;
+ abfd->origin = 0;
+ abfd->opened_once = FALSE;
+ abfd->output_has_begun = FALSE;
abfd->section_count = 0;
- abfd->usrdata = (PTR) NULL;
- abfd->cacheable = false;
- abfd->flags = BFD_IN_MEMORY;
- abfd->mtime_set = false;
+ abfd->usrdata = NULL;
+ abfd->cacheable = FALSE;
+ abfd->flags |= BFD_IN_MEMORY;
+ abfd->mtime_set = FALSE;
- abfd->target_defaulted = true;
+ abfd->target_defaulted = TRUE;
abfd->direction = read_direction;
abfd->sections = 0;
abfd->symcount = 0;
abfd->outsymbols = 0;
abfd->tdata.any = 0;
- bfd_check_format(abfd, bfd_object);
+ bfd_section_list_clear (abfd);
+ bfd_check_format (abfd, bfd_object);
- return true;
+ return TRUE;
}
/*
-INTERNAL_FUNCTION
+FUNCTION
bfd_alloc
SYNOPSIS
- PTR bfd_alloc (bfd *abfd, size_t wanted);
+ void *bfd_alloc (bfd *abfd, bfd_size_type wanted);
DESCRIPTION
Allocate a block of @var{wanted} bytes of memory attached to
<<abfd>> and return a pointer to it.
*/
-
-PTR
-bfd_alloc (abfd, size)
- bfd *abfd;
- size_t size;
+void *
+bfd_alloc (bfd *abfd, bfd_size_type size)
{
- PTR ret;
+ void *ret;
+ unsigned long ul_size = (unsigned long) size;
+
+ if (size != ul_size
+ /* Note - although objalloc_alloc takes an unsigned long as its
+ argument, internally the size is treated as a signed long. This can
+ lead to problems where, for example, a request to allocate -1 bytes
+ can result in just 1 byte being allocated, rather than
+ ((unsigned long) -1) bytes. Also memory checkers will often
+ complain about attempts to allocate a negative amount of memory.
+ So to stop these problems we fail if the size is negative. */
+ || ((signed long) ul_size) < 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
- ret = objalloc_alloc (abfd->memory, (unsigned long) size);
+ ret = objalloc_alloc ((struct objalloc *) abfd->memory, ul_size);
if (ret == NULL)
bfd_set_error (bfd_error_no_memory);
return ret;
}
-PTR
-bfd_zalloc (abfd, size)
- bfd *abfd;
- size_t size;
+/*
+FUNCTION
+ bfd_zalloc
+
+SYNOPSIS
+ void *bfd_zalloc (bfd *abfd, bfd_size_type wanted);
+
+DESCRIPTION
+ Allocate a block of @var{wanted} bytes of zeroed memory
+ attached to <<abfd>> and return a pointer to it.
+*/
+
+void *
+bfd_zalloc (bfd *abfd, bfd_size_type size)
{
- PTR res;
+ void *res;
res = bfd_alloc (abfd, size);
if (res)
- memset (res, 0, size);
+ memset (res, 0, (size_t) size);
return res;
}
-/* Free a block allocated for a BFD. */
+/* Free a block allocated for a BFD.
+ Note: Also frees all more recently allocated blocks! */
void
-bfd_release (abfd, block)
- bfd *abfd;
- PTR block;
+bfd_release (bfd *abfd, void *block)
{
objalloc_free_block ((struct objalloc *) abfd->memory, block);
}
+
+
+/*
+ GNU Extension: separate debug-info files
+
+ The idea here is that a special section called .gnu_debuglink might be
+ embedded in a binary file, which indicates that some *other* file
+ contains the real debugging information. This special section contains a
+ filename and CRC32 checksum, which we read and resolve to another file,
+ if it exists.
+
+ This facilitates "optional" provision of debugging information, without
+ having to provide two complete copies of every binary object (with and
+ without debug symbols). */
+
+#define GNU_DEBUGLINK ".gnu_debuglink"
+#define GNU_DEBUGALTLINK ".gnu_debugaltlink"
+
+/*
+FUNCTION
+ bfd_calc_gnu_debuglink_crc32
+
+SYNOPSIS
+ unsigned long bfd_calc_gnu_debuglink_crc32
+ (unsigned long crc, const unsigned char *buf, bfd_size_type len);
+
+DESCRIPTION
+ Computes a CRC value as used in the .gnu_debuglink section.
+ Advances the previously computed @var{crc} value by computing
+ and adding in the crc32 for @var{len} bytes of @var{buf}.
+
+RETURNS
+ Return the updated CRC32 value.
+*/
+
+unsigned long
+bfd_calc_gnu_debuglink_crc32 (unsigned long crc,
+ const unsigned char *buf,
+ bfd_size_type len)
+{
+ static const unsigned long crc32_table[256] =
+ {
+ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
+ 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
+ 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
+ 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+ 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
+ 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+ 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
+ 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+ 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
+ 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
+ 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
+ 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+ 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
+ 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
+ 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
+ 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+ 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
+ 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+ 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
+ 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+ 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
+ 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
+ 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
+ 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+ 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
+ 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
+ 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
+ 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+ 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
+ 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+ 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
+ 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+ 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
+ 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
+ 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
+ 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+ 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
+ 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
+ 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
+ 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+ 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
+ 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+ 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
+ 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+ 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
+ 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
+ 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
+ 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+ 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
+ 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
+ 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
+ 0x2d02ef8d
+ };
+ const unsigned char *end;
+
+ crc = ~crc & 0xffffffff;
+ for (end = buf + len; buf < end; ++ buf)
+ crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+ return ~crc & 0xffffffff;
+}
+
+
+/*
+INTERNAL_FUNCTION
+ bfd_get_debug_link_info_1
+
+SYNOPSIS
+ char *bfd_get_debug_link_info_1 (bfd *abfd, void *crc32_out);
+
+DESCRIPTION
+ Extracts the filename and CRC32 value for any separate debug
+ information file associated with @var{abfd}.
+
+ The @var{crc32_out} parameter is an untyped pointer because
+ this routine is used as a @code{get_func_type} function, but it
+ is expected to be an unsigned long pointer.
+
+RETURNS
+ The filename of the associated debug information file, or NULL
+ if there is no such file. If the filename was found then the
+ contents of @var{crc32_out} are updated to hold the corresponding
+ CRC32 value for the file.
+
+ The returned filename is allocated with @code{malloc}; freeing
+ it is the responsibility of the caller.
+*/
+
+static char *
+bfd_get_debug_link_info_1 (bfd *abfd, void *crc32_out)
+{
+ asection *sect;
+ unsigned long *crc32 = (unsigned long *) crc32_out;
+ bfd_byte *contents;
+ unsigned int crc_offset;
+ char *name;
+ bfd_size_type size;
+ ufile_ptr file_size;
+
+ BFD_ASSERT (abfd);
+ BFD_ASSERT (crc32_out);
+
+ sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
+
+ if (sect == NULL)
+ return NULL;
+
+ size = bfd_section_size (sect);
+ file_size = bfd_get_size (abfd);
+
+ /* PR 22794: Make sure that the section has a reasonable size. */
+ if (size < 8 || (file_size != 0 && size >= file_size))
+ return NULL;
+
+ if (!bfd_malloc_and_get_section (abfd, sect, &contents))
+ {
+ free (contents);
+ return NULL;
+ }
+
+ /* CRC value is stored after the filename, aligned up to 4 bytes. */
+ name = (char *) contents;
+ /* PR 17597: Avoid reading off the end of the buffer. */
+ crc_offset = strnlen (name, size) + 1;
+ crc_offset = (crc_offset + 3) & ~3;
+ if (crc_offset + 4 > size)
+ return NULL;
+
+ *crc32 = bfd_get_32 (abfd, contents + crc_offset);
+ return name;
+}
+
+
+/*
+FUNCTION
+ bfd_get_debug_link_info
+
+SYNOPSIS
+ char *bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out);
+
+DESCRIPTION
+ Extracts the filename and CRC32 value for any separate debug
+ information file associated with @var{abfd}.
+
+RETURNS
+ The filename of the associated debug information file, or NULL
+ if there is no such file. If the filename was found then the
+ contents of @var{crc32_out} are updated to hold the corresponding
+ CRC32 value for the file.
+
+ The returned filename is allocated with @code{malloc}; freeing
+ it is the responsibility of the caller.
+*/
+
+char *
+bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out)
+{
+ return bfd_get_debug_link_info_1 (abfd, crc32_out);
+}
+
+/*
+FUNCTION
+ bfd_get_alt_debug_link_info
+
+SYNOPSIS
+ char *bfd_get_alt_debug_link_info (bfd * abfd,
+ bfd_size_type *buildid_len,
+ bfd_byte **buildid_out);
+
+DESCRIPTION
+ Fetch the filename and BuildID value for any alternate debuginfo
+ associated with @var{abfd}. Return NULL if no such info found,
+ otherwise return filename and update @var{buildid_len} and
+ @var{buildid_out}. The returned filename and build_id are
+ allocated with @code{malloc}; freeing them is the responsibility
+ of the caller.
+*/
+
+char *
+bfd_get_alt_debug_link_info (bfd * abfd, bfd_size_type *buildid_len,
+ bfd_byte **buildid_out)
+{
+ asection *sect;
+ bfd_byte *contents;
+ unsigned int buildid_offset;
+ char *name;
+ bfd_size_type size;
+ ufile_ptr file_size;
+
+ BFD_ASSERT (abfd);
+ BFD_ASSERT (buildid_len);
+ BFD_ASSERT (buildid_out);
+
+ sect = bfd_get_section_by_name (abfd, GNU_DEBUGALTLINK);
+
+ if (sect == NULL)
+ return NULL;
+
+ size = bfd_section_size (sect);
+ file_size = bfd_get_size (abfd);
+ if (size < 8 || (file_size != 0 && size >= file_size))
+ return NULL;
+
+ if (!bfd_malloc_and_get_section (abfd, sect, & contents))
+ {
+ free (contents);
+ return NULL;
+ }
+
+ /* BuildID value is stored after the filename. */
+ name = (char *) contents;
+ buildid_offset = strnlen (name, size) + 1;
+ if (buildid_offset >= bfd_section_size (sect))
+ return NULL;
+
+ *buildid_len = size - buildid_offset;
+ *buildid_out = bfd_malloc (*buildid_len);
+ memcpy (*buildid_out, contents + buildid_offset, *buildid_len);
+
+ return name;
+}
+
+/*
+INTERNAL_FUNCTION
+ separate_debug_file_exists
+
+SYNOPSIS
+ bfd_boolean separate_debug_file_exists
+ (char *name, void *crc32_p);
+
+DESCRIPTION
+ Checks to see if @var{name} is a file and if its contents
+ match @var{crc32}, which is a pointer to an @code{unsigned
+ long} containing a CRC32.
+
+ The @var{crc32_p} parameter is an untyped pointer because
+ this routine is used as a @code{check_func_type} function.
+*/
+
+static bfd_boolean
+separate_debug_file_exists (const char *name, void *crc32_p)
+{
+ static unsigned char buffer [8 * 1024];
+ unsigned long file_crc = 0;
+ FILE *f;
+ bfd_size_type count;
+ unsigned long crc;
+
+ BFD_ASSERT (name);
+ BFD_ASSERT (crc32_p);
+
+ crc = *(unsigned long *) crc32_p;
+
+ f = _bfd_real_fopen (name, FOPEN_RB);
+ if (f == NULL)
+ return FALSE;
+
+ while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0)
+ file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
+
+ fclose (f);
+
+ return crc == file_crc;
+}
+
+/*
+INTERNAL_FUNCTION
+ separate_alt_debug_file_exists
+
+SYNOPSIS
+ bfd_boolean separate_alt_debug_file_exists
+ (char *name, void *unused);
+
+DESCRIPTION
+ Checks to see if @var{name} is a file.
+*/
+
+static bfd_boolean
+separate_alt_debug_file_exists (const char *name, void *unused ATTRIBUTE_UNUSED)
+{
+ FILE *f;
+
+ BFD_ASSERT (name);
+
+ f = _bfd_real_fopen (name, FOPEN_RB);
+ if (f == NULL)
+ return FALSE;
+
+ fclose (f);
+
+ return TRUE;
+}
+
+/*
+INTERNAL_FUNCTION
+ find_separate_debug_file
+
+SYNOPSIS
+ char *find_separate_debug_file
+ (bfd *abfd, const char *dir, bfd_boolean include_dirs,
+ get_func_type get, check_func_type check, void *data);
+
+DESCRIPTION
+ Searches for a debug information file corresponding to @var{abfd}.
+
+ The name of the separate debug info file is returned by the
+ @var{get} function. This function scans various fixed locations
+ in the filesystem, including the file tree rooted at @var{dir}.
+ If the @var{include_dirs} parameter is true then the directory
+ components of @var{abfd}'s filename will be included in the
+ searched locations.
+
+ @var{data} is passed unmodified to the @var{get} and @var{check}
+ functions. It is generally used to implement build-id-like
+ matching in the callback functions.
+
+RETURNS
+ Returns the filename of the first file to be found which
+ receives a TRUE result from the @var{check} function.
+ Returns NULL if no valid file could be found.
+*/
+
+typedef char * (* get_func_type) (bfd *, void *);
+typedef bfd_boolean (* check_func_type) (const char *, void *);
+
+static char *
+find_separate_debug_file (bfd * abfd,
+ const char * debug_file_directory,
+ bfd_boolean include_dirs,
+ get_func_type get_func,
+ check_func_type check_func,
+ void * func_data)
+{
+ char *base;
+ char *dir;
+ char *debugfile;
+ char *canon_dir;
+ size_t dirlen;
+ size_t canon_dirlen;
+
+ BFD_ASSERT (abfd);
+ if (debug_file_directory == NULL)
+ debug_file_directory = ".";
+
+ /* BFD may have been opened from a stream. */
+ if (bfd_get_filename (abfd) == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ base = get_func (abfd, func_data);
+
+ if (base == NULL)
+ return NULL;
+
+ if (base[0] == '\0')
+ {
+ free (base);
+ bfd_set_error (bfd_error_no_debug_section);
+ return NULL;
+ }
+
+ if (include_dirs)
+ {
+ const char *fname = bfd_get_filename (abfd);
+ for (dirlen = strlen (fname); dirlen > 0; dirlen--)
+ if (IS_DIR_SEPARATOR (fname[dirlen - 1]))
+ break;
+
+ dir = (char *) bfd_malloc (dirlen + 1);
+ if (dir == NULL)
+ {
+ free (base);
+ return NULL;
+ }
+ memcpy (dir, fname, dirlen);
+ dir[dirlen] = '\0';
+ }
+ else
+ {
+ dir = (char *) bfd_malloc (1);
+ * dir = 0;
+ dirlen = 0;
+ }
+
+ /* Compute the canonical name of the bfd object with all symbolic links
+ resolved, for use in the global debugfile directory. */
+ canon_dir = lrealpath (bfd_get_filename (abfd));
+ for (canon_dirlen = strlen (canon_dir); canon_dirlen > 0; canon_dirlen--)
+ if (IS_DIR_SEPARATOR (canon_dir[canon_dirlen - 1]))
+ break;
+ canon_dir[canon_dirlen] = '\0';
+
+#ifndef EXTRA_DEBUG_ROOT1
+#define EXTRA_DEBUG_ROOT1 "/usr/lib/debug"
+#endif
+#ifndef EXTRA_DEBUG_ROOT2
+#define EXTRA_DEBUG_ROOT2 "/usr/lib/debug/usr"
+#endif
+
+ debugfile = (char *)
+ bfd_malloc (strlen (debug_file_directory) + 1
+ + (canon_dirlen > dirlen ? canon_dirlen : dirlen)
+ + strlen (".debug/")
+#ifdef EXTRA_DEBUG_ROOT1
+ + strlen (EXTRA_DEBUG_ROOT1)
+#endif
+#ifdef EXTRA_DEBUG_ROOT2
+ + strlen (EXTRA_DEBUG_ROOT2)
+#endif
+ + strlen (base)
+ + 1);
+ if (debugfile == NULL)
+ goto found; /* Actually this returns NULL. */
+
+ /* First try in the same directory as the original file.
+
+ FIXME: Strictly speaking if we are using the build-id method,
+ (ie include_dirs == FALSE) then we should only check absolute
+ paths, not relative ones like this one (and the next one).
+ The check is left in however as this allows the binutils
+ testsuite to exercise this feature without having to install
+ a file into the root filesystem. (See binutils/testsuite/
+ binutils-all/objdump.exp for the test). */
+ sprintf (debugfile, "%s%s", dir, base);
+ if (check_func (debugfile, func_data))
+ goto found;
+
+ /* Then try in a subdirectory called .debug. */
+ sprintf (debugfile, "%s.debug/%s", dir, base);
+ if (check_func (debugfile, func_data))
+ goto found;
+
+#ifdef EXTRA_DEBUG_ROOT1
+ /* Try the first extra debug file root. */
+ sprintf (debugfile, "%s%s%s", EXTRA_DEBUG_ROOT1,
+ include_dirs ? canon_dir : "/", base);
+ if (check_func (debugfile, func_data))
+ goto found;
+#endif
+
+#ifdef EXTRA_DEBUG_ROOT2
+ /* Try the second extra debug file root. */
+ sprintf (debugfile, "%s%s%s", EXTRA_DEBUG_ROOT2,
+ include_dirs ? canon_dir : "/", base);
+ if (check_func (debugfile, func_data))
+ goto found;
+#endif
+
+ /* Then try in the global debugfile directory. */
+ strcpy (debugfile, debug_file_directory);
+ dirlen = strlen (debug_file_directory) - 1;
+ if (include_dirs)
+ {
+ if (dirlen > 0
+ && debug_file_directory[dirlen] != '/'
+ && canon_dir[0] != '/')
+ strcat (debugfile, "/");
+ strcat (debugfile, canon_dir);
+ }
+ else
+ {
+ if (dirlen > 0 && debug_file_directory[dirlen] != '/')
+ strcat (debugfile, "/");
+ }
+ strcat (debugfile, base);
+
+ if (check_func (debugfile, func_data))
+ goto found;
+
+ /* Failed to find the file. */
+ free (debugfile);
+ debugfile = NULL;
+
+ found:
+ free (base);
+ free (dir);
+ free (canon_dir);
+ return debugfile;
+}
+
+/*
+FUNCTION
+ bfd_follow_gnu_debuglink
+
+SYNOPSIS
+ char *bfd_follow_gnu_debuglink (bfd *abfd, const char *dir);
+
+DESCRIPTION
+ Takes a BFD and searches it for a .gnu_debuglink section. If this
+ section is found, it examines the section for the name and checksum
+ of a '.debug' file containing auxiliary debugging information. It
+ then searches the filesystem for this .debug file in some standard
+ locations, including the directory tree rooted at @var{dir}, and if
+ found returns the full filename.
+
+ If @var{dir} is NULL, the search will take place starting at
+ the current directory.
+
+RETURNS
+ <<NULL>> on any errors or failure to locate the .debug file,
+ otherwise a pointer to a heap-allocated string containing the
+ filename. The caller is responsible for freeing this string.
+*/
+
+char *
+bfd_follow_gnu_debuglink (bfd *abfd, const char *dir)
+{
+ unsigned long crc32;
+
+ return find_separate_debug_file (abfd, dir, TRUE,
+ bfd_get_debug_link_info_1,
+ separate_debug_file_exists, &crc32);
+}
+
+/* Helper for bfd_follow_gnu_debugaltlink. It just returns the name
+ of the separate debug file. */
+
+static char *
+get_alt_debug_link_info_shim (bfd * abfd, void *unused ATTRIBUTE_UNUSED)
+{
+ bfd_size_type len;
+ bfd_byte *buildid = NULL;
+ char *result = bfd_get_alt_debug_link_info (abfd, &len, &buildid);
+
+ free (buildid);
+
+ return result;
+}
+
+/*
+FUNCTION
+ bfd_follow_gnu_debugaltlink
+
+SYNOPSIS
+ char *bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir);
+
+DESCRIPTION
+ Takes a BFD and searches it for a .gnu_debugaltlink section. If this
+ section is found, it examines the section for the name of a file
+ containing auxiliary debugging information. It then searches the
+ filesystem for this file in a set of standard locations, including
+ the directory tree rooted at @var{dir}, and if found returns the
+ full filename.
+
+ If @var{dir} is NULL, the search will take place starting at
+ the current directory.
+
+RETURNS
+ <<NULL>> on any errors or failure to locate the debug file,
+ otherwise a pointer to a heap-allocated string containing the
+ filename. The caller is responsible for freeing this string.
+*/
+
+char *
+bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir)
+{
+ return find_separate_debug_file (abfd, dir, TRUE,
+ get_alt_debug_link_info_shim,
+ separate_alt_debug_file_exists,
+ NULL);
+}
+
+/*
+FUNCTION
+ bfd_create_gnu_debuglink_section
+
+SYNOPSIS
+ struct bfd_section *bfd_create_gnu_debuglink_section
+ (bfd *abfd, const char *filename);
+
+DESCRIPTION
+ Takes a @var{BFD} and adds a .gnu_debuglink section to it. The
+ section is sized to be big enough to contain a link to the specified
+ @var{filename}.
+
+RETURNS
+ A pointer to the new section is returned if all is ok. Otherwise
+ <<NULL>> is returned and bfd_error is set.
+*/
+
+asection *
+bfd_create_gnu_debuglink_section (bfd *abfd, const char *filename)
+{
+ asection *sect;
+ bfd_size_type debuglink_size;
+ flagword flags;
+
+ if (abfd == NULL || filename == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ /* Strip off any path components in filename. */
+ filename = lbasename (filename);
+
+ sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
+ if (sect)
+ {
+ /* Section already exists. */
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING;
+ sect = bfd_make_section_with_flags (abfd, GNU_DEBUGLINK, flags);
+ if (sect == NULL)
+ return NULL;
+
+ /* Compute the size of the section. Allow for the CRC after the filename,
+ and padding so that it will start on a 4-byte boundary. */
+ debuglink_size = strlen (filename) + 1;
+ debuglink_size += 3;
+ debuglink_size &= ~3;
+ debuglink_size += 4;
+
+ if (!bfd_set_section_size (sect, debuglink_size))
+ /* XXX Should we delete the section from the bfd ? */
+ return NULL;
+
+ /* PR 21193: Ensure that the section has 4-byte alignment for the CRC.
+ Note - despite the name of the function being called, we are
+ setting an alignment power, not a byte alignment value. */
+ bfd_set_section_alignment (sect, 2);
+
+ return sect;
+}
+
+
+/*
+FUNCTION
+ bfd_fill_in_gnu_debuglink_section
+
+SYNOPSIS
+ bfd_boolean bfd_fill_in_gnu_debuglink_section
+ (bfd *abfd, struct bfd_section *sect, const char *filename);
+
+DESCRIPTION
+ Takes a @var{BFD} and containing a .gnu_debuglink section @var{SECT}
+ and fills in the contents of the section to contain a link to the
+ specified @var{filename}. The filename should be relative to the
+ current directory.
+
+RETURNS
+ <<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned
+ and bfd_error is set.
+*/
+
+bfd_boolean
+bfd_fill_in_gnu_debuglink_section (bfd *abfd,
+ struct bfd_section *sect,
+ const char *filename)
+{
+ bfd_size_type debuglink_size;
+ unsigned long crc32;
+ char * contents;
+ bfd_size_type crc_offset;
+ FILE * handle;
+ static unsigned char buffer[8 * 1024];
+ size_t count;
+ size_t filelen;
+
+ if (abfd == NULL || sect == NULL || filename == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
+ }
+
+ /* Make sure that we can read the file.
+ XXX - Should we attempt to locate the debug info file using the same
+ algorithm as gdb ? At the moment, since we are creating the
+ .gnu_debuglink section, we insist upon the user providing us with a
+ correct-for-section-creation-time path, but this need not conform to
+ the gdb location algorithm. */
+ handle = _bfd_real_fopen (filename, FOPEN_RB);
+ if (handle == NULL)
+ {
+ bfd_set_error (bfd_error_system_call);
+ return FALSE;
+ }
+
+ crc32 = 0;
+ while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0)
+ crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count);
+ fclose (handle);
+
+ /* Strip off any path components in filename,
+ now that we no longer need them. */
+ filename = lbasename (filename);
+
+ filelen = strlen (filename);
+ debuglink_size = filelen + 1;
+ debuglink_size += 3;
+ debuglink_size &= ~3;
+ debuglink_size += 4;
+
+ contents = (char *) bfd_malloc (debuglink_size);
+ if (contents == NULL)
+ {
+ /* XXX Should we delete the section from the bfd ? */
+ return FALSE;
+ }
+
+ crc_offset = debuglink_size - 4;
+ memcpy (contents, filename, filelen);
+ memset (contents + filelen, 0, crc_offset - filelen);
+
+ bfd_put_32 (abfd, crc32, contents + crc_offset);
+
+ if (! bfd_set_section_contents (abfd, sect, contents, 0, debuglink_size))
+ {
+ /* XXX Should we delete the section from the bfd ? */
+ free (contents);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/*
+INTERNAL_FUNCTION
+ get_build_id
+
+SYNOPSIS
+ struct bfd_build_id * get_build_id (bfd *abfd);
+
+DESCRIPTION
+ Finds the build-id associated with @var{abfd}. If the build-id is
+ extracted from the note section then a build-id structure is built
+ for it, using memory allocated to @var{abfd}, and this is then
+ attached to the @var{abfd}.
+
+RETURNS
+ Returns a pointer to the build-id structure if a build-id could be
+ found. If no build-id is found NULL is returned and error code is
+ set.
+*/
+
+static struct bfd_build_id *
+get_build_id (bfd *abfd)
+{
+ struct bfd_build_id *build_id;
+ Elf_Internal_Note inote;
+ Elf_External_Note *enote;
+ bfd_byte *contents;
+ asection *sect;
+ bfd_size_type size;
+
+ BFD_ASSERT (abfd);
+
+ if (abfd->build_id && abfd->build_id->size > 0)
+ /* Save some time by using the already computed build-id. */
+ return (struct bfd_build_id *) abfd->build_id;
+
+ sect = bfd_get_section_by_name (abfd, ".note.gnu.build-id");
+ if (sect == NULL)
+ {
+ bfd_set_error (bfd_error_no_debug_section);
+ return NULL;
+ }
+
+ size = bfd_section_size (sect);
+ /* FIXME: Should we support smaller build-id notes ? */
+ if (size < 0x24)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ if (!bfd_malloc_and_get_section (abfd, sect, & contents))
+ {
+ free (contents);
+ return NULL;
+ }
+
+ /* FIXME: Paranoia - allow for compressed build-id sections.
+ Maybe we should complain if this size is different from
+ the one obtained above... */
+ size = bfd_section_size (sect);
+ if (size < sizeof (Elf_External_Note))
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ free (contents);
+ return NULL;
+ }
+
+ enote = (Elf_External_Note *) contents;
+ inote.type = H_GET_32 (abfd, enote->type);
+ inote.namesz = H_GET_32 (abfd, enote->namesz);
+ inote.namedata = enote->name;
+ inote.descsz = H_GET_32 (abfd, enote->descsz);
+ inote.descdata = inote.namedata + BFD_ALIGN (inote.namesz, 4);
+ /* FIXME: Should we check for extra notes in this section ? */
+
+ if (inote.descsz <= 0
+ || inote.type != NT_GNU_BUILD_ID
+ || inote.namesz != 4 /* sizeof "GNU" */
+ || strncmp (inote.namedata, "GNU", 4) != 0
+ || inote.descsz > 0x7ffffffe
+ || size < (12 + BFD_ALIGN (inote.namesz, 4) + inote.descsz))
+ {
+ free (contents);
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) + inote.descsz);
+ if (build_id == NULL)
+ {
+ free (contents);
+ return NULL;
+ }
+
+ build_id->size = inote.descsz;
+ memcpy (build_id->data, inote.descdata, inote.descsz);
+ abfd->build_id = build_id;
+ free (contents);
+
+ return build_id;
+}
+
+/*
+INTERNAL_FUNCTION
+ get_build_id_name
+
+SYNOPSIS
+ char * get_build_id_name (bfd *abfd, void *build_id_out_p)
+
+DESCRIPTION
+ Searches @var{abfd} for a build-id, and then constructs a pathname
+ from it. The path is computed as .build-id/NN/NN+NN.debug where
+ NNNN+NN is the build-id value as a hexadecimal string.
+
+RETURNS
+ Returns the constructed filename or NULL upon error.
+ It is the caller's responsibility to free the memory used to hold the
+ filename.
+ If a filename is returned then the @var{build_id_out_p}
+ parameter (which points to a @code{struct bfd_build_id}
+ pointer) is set to a pointer to the build_id structure.
+*/
+
+static char *
+get_build_id_name (bfd *abfd, void *build_id_out_p)
+{
+ struct bfd_build_id **build_id_out = build_id_out_p;
+ struct bfd_build_id *build_id;
+ char *name;
+ char *n;
+ bfd_size_type s;
+ bfd_byte *d;
+
+ if (abfd == NULL || bfd_get_filename (abfd) == NULL || build_id_out == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ build_id = get_build_id (abfd);
+ if (build_id == NULL)
+ return NULL;
+
+ /* Compute the debug pathname corresponding to the build-id. */
+ name = bfd_malloc (strlen (".build-id/") + build_id->size * 2 + 2 + strlen (".debug"));
+ if (name == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ n = name;
+ d = build_id->data;
+ s = build_id->size;
+
+ n += sprintf (n, ".build-id/");
+ n += sprintf (n, "%02x", (unsigned) *d++); s--;
+ n += sprintf (n, "/");
+ while (s--)
+ n += sprintf (n, "%02x", (unsigned) *d++);
+ n += sprintf (n, ".debug");
+
+ *build_id_out = build_id;
+ return name;
+}
+
+/*
+INTERNAL_FUNCTION
+ check_build_id_file
+
+SYNOPSIS
+ bfd_boolean check_build_id_file (char *name, void *buildid_p);
+
+DESCRIPTION
+ Checks to see if @var{name} is a readable file and if its build-id
+ matches @var{buildid}.
+
+RETURNS
+ Returns TRUE if the file exists, is readable, and contains a
+ build-id which matches the build-id pointed at by
+ @var{build_id_p} (which is really a @code{struct bfd_build_id **}).
+*/
+
+static bfd_boolean
+check_build_id_file (const char *name, void *buildid_p)
+{
+ struct bfd_build_id *orig_build_id;
+ struct bfd_build_id *build_id;
+ bfd * file;
+ bfd_boolean result;
+
+ BFD_ASSERT (name);
+ BFD_ASSERT (buildid_p);
+
+ file = bfd_openr (name, NULL);
+ if (file == NULL)
+ return FALSE;
+
+ /* If the file is an archive, process all of its elements. */
+ if (! bfd_check_format (file, bfd_object))
+ {
+ bfd_close (file);
+ return FALSE;
+ }
+
+ build_id = get_build_id (file);
+ if (build_id == NULL)
+ {
+ bfd_close (file);
+ return FALSE;
+ }
+
+ orig_build_id = *(struct bfd_build_id **) buildid_p;
+
+ result = build_id->size == orig_build_id->size
+ && memcmp (build_id->data, orig_build_id->data, build_id->size) == 0;
+
+ (void) bfd_close (file);
+
+ return result;
+}
+
+/*
+FUNCTION
+ bfd_follow_build_id_debuglink
+
+SYNOPSIS
+ char *bfd_follow_build_id_debuglink (bfd *abfd, const char *dir);
+
+DESCRIPTION
+ Takes @var{abfd} and searches it for a .note.gnu.build-id section.
+ If this section is found, it extracts the value of the NT_GNU_BUILD_ID
+ note, which should be a hexadecimal value @var{NNNN+NN} (for
+ 32+ hex digits). It then searches the filesystem for a file named
+ @var{.build-id/NN/NN+NN.debug} in a set of standard locations,
+ including the directory tree rooted at @var{dir}. The filename
+ of the first matching file to be found is returned. A matching
+ file should contain a .note.gnu.build-id section with the same
+ @var{NNNN+NN} note as @var{abfd}, although this check is currently
+ not implemented.
+
+ If @var{dir} is NULL, the search will take place starting at
+ the current directory.
+
+RETURNS
+ <<NULL>> on any errors or failure to locate the debug file,
+ otherwise a pointer to a heap-allocated string containing the
+ filename. The caller is responsible for freeing this string.
+*/
+
+char *
+bfd_follow_build_id_debuglink (bfd *abfd, const char *dir)
+{
+ struct bfd_build_id *build_id;
+
+ return find_separate_debug_file (abfd, dir, FALSE,
+ get_build_id_name,
+ check_build_id_file, &build_id);
+}
+
+/*
+FUNCTION
+ bfd_set_filename
+
+SYNOPSIS
+ const char *bfd_set_filename (bfd *abfd, const char *filename);
+
+DESCRIPTION
+ Set the filename of @var{abfd}, copying the FILENAME parameter to
+ bfd_alloc'd memory owned by @var{abfd}. Returns a pointer the
+ newly allocated name, or NULL if the allocation failed.
+*/
+
+const char *
+bfd_set_filename (bfd *abfd, const char *filename)
+{
+ size_t len = strlen (filename) + 1;
+ char *n = bfd_alloc (abfd, len);
+ if (n)
+ {
+ memcpy (n, filename, len);
+ abfd->filename = n;
+ }
+ return n;
+}
projects / deliverable / binutils-gdb.git / blobdiff