/* opncls.c -- open and close a BFD.
- Copyright (C) 1990-1991 Free Software Foundation, Inc.
- Written by Cygnus Support.
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
+ 2001, 2002, 2003, 2004
+ Free Software Foundation, Inc.
-This file is part of BFD, the Binary File Descriptor library.
+ Written by Cygnus Support.
-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 file is part of BFD, the Binary File Descriptor library.
-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 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.
-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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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.
-/* $Id$ */
+ 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. */
-#include <sysdep.h>
#include "bfd.h"
+#include "sysdep.h"
+#include "objalloc.h"
#include "libbfd.h"
-#include "obstack.h"
-extern void bfd_cache_init();
-FILE *bfd_open_file();
-
-/* fdopen is a loser -- we should use stdio exclusively. Unfortunately
- if we do that we can't use fcntl. */
+#include "libiberty.h"
-/** Locking
-
- Locking is loosely controlled by the preprocessor variable
- BFD_LOCKS. I say loosely because Unix barely understands locking
- -- at least in BSD it doesn't affect programs which don't
- explicitly use it! That is to say it's practically useless, though
- if everyone uses this library you'll be OK.
-
- From among the many and varied lock facilities available, (none of
- which, of course, knows about any other) we use the fcntl locks,
- because they're Posix.
+#ifndef S_IXUSR
+#define S_IXUSR 0100 /* Execute by owner. */
+#endif
+#ifndef S_IXGRP
+#define S_IXGRP 0010 /* Execute by group. */
+#endif
+#ifndef S_IXOTH
+#define S_IXOTH 0001 /* Execute by others. */
+#endif
- The reason that @code{bfd_openr} and @code{bfd_fdopenr} exist, yet
- only @code{bfd_openw} exists is because of locking. When we do
- output, we lock the filename file for output, then open a temporary
- file which does not actually get its correct filename until closing
- time. This is safest, but requires the asymmetry in read and write
- entry points.
+/* Counter used to initialize the bfd identifier. */
- Perhaps, since unix has so many different kinds of locking anyway,
- we should use the emacs lock scheme?... */
+static unsigned int _bfd_id_counter = 0;
-#define obstack_chunk_alloc malloc
-#define obstack_chunk_free free
+/* fdopen is a loser -- we should use stdio exclusively. Unfortunately
+ if we do that we can't use fcntl. */
/* Return a new BFD. All BFD's are allocated through this routine. */
-bfd *new_bfd()
+bfd *
+_bfd_new_bfd (void)
{
bfd *nbfd;
- nbfd = (bfd *)zalloc (sizeof (bfd));
- if (!nbfd)
- return 0;
+ nbfd = bfd_zmalloc (sizeof (bfd));
+ if (nbfd == NULL)
+ return NULL;
+
+ 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;
- obstack_begin((PTR)&nbfd->memory, 128);
-
nbfd->direction = no_direction;
nbfd->iostream = NULL;
nbfd->where = 0;
- nbfd->sections = (asection *)NULL;
+ if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc,
+ 251))
+ {
+ free (nbfd);
+ return NULL;
+ }
+ nbfd->sections = NULL;
+ nbfd->section_tail = &nbfd->sections;
nbfd->format = bfd_unknown;
- nbfd->my_archive = (bfd *)NULL;
- nbfd->origin = 0;
- nbfd->opened_once = false;
- nbfd->output_has_begun = false;
+ nbfd->my_archive = NULL;
+ nbfd->origin = 0;
+ nbfd->opened_once = FALSE;
+ nbfd->output_has_begun = FALSE;
nbfd->section_count = 0;
- nbfd->usrdata = (PTR)NULL;
- nbfd->sections = (asection *)NULL;
- nbfd->cacheable = false;
- nbfd->flags = NO_FLAGS;
- nbfd->mtime_set = 0;
+ nbfd->usrdata = NULL;
+ nbfd->cacheable = FALSE;
+ nbfd->flags = BFD_NO_FLAGS;
+ nbfd->mtime_set = FALSE;
+
return nbfd;
}
/* Allocate a new BFD as a member of archive OBFD. */
-bfd *new_bfd_contained_in(obfd)
-bfd *obfd;
+bfd *
+_bfd_new_bfd_contained_in (bfd *obfd)
{
- bfd *nbfd = new_bfd();
- nbfd->xvec = obfd->xvec;
- nbfd->my_archive = obfd;
- nbfd->direction = read_direction;
- return nbfd;
+ bfd *nbfd;
+
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ return NULL;
+ nbfd->xvec = obfd->xvec;
+ nbfd->iovec = obfd->iovec;
+ nbfd->my_archive = obfd;
+ nbfd->direction = read_direction;
+ nbfd->target_defaulted = obfd->target_defaulted;
+ return nbfd;
+}
+
+/* Delete a BFD. */
+
+void
+_bfd_delete_bfd (bfd *abfd)
+{
+ bfd_hash_table_free (&abfd->section_htab);
+ objalloc_free ((struct objalloc *) abfd->memory);
+ free (abfd);
}
-/*doc*
-@section Opening and Closing BFDs
+/*
+SECTION
+ Opening and closing BFDs
*/
-/*proto*
-*i bfd_openr
-Opens the file supplied (using @code{fopen}) with the target supplied, it
-returns a pointer to the created BFD.
-If NULL is returned then an error has occured.
-Possible errors are no_memory, invalid_target or system_call error.
-*; PROTO(bfd*, bfd_openr, (CONST char *filename,CONST char*target));
-*-*/
+/*
+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.
+*/
bfd *
-DEFUN(bfd_openr, (filename, target),
- CONST char *filename AND
- CONST char *target)
+bfd_openr (const char *filename, const char *target)
{
bfd *nbfd;
- bfd_target *target_vec;
+ const bfd_target *target_vec;
- nbfd = new_bfd();
- if (nbfd == NULL) {
- bfd_error = no_memory;
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
return NULL;
- }
target_vec = bfd_find_target (target, nbfd);
- if (target_vec == NULL) {
- bfd_error = invalid_target;
- return NULL;
- }
+ if (target_vec == NULL)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
nbfd->filename = filename;
- nbfd->direction = read_direction;
+ nbfd->direction = read_direction;
+
+ if (bfd_open_file (nbfd) == NULL)
+ {
+ /* File didn't exist, or some such. */
+ bfd_set_error (bfd_error_system_call);
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
- if (bfd_open_file (nbfd) == NULL) {
- bfd_error = system_call_error; /* File didn't exist, or some such */
- bfd_release(nbfd,0);
- return NULL;
- }
return nbfd;
}
-
/* 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.
- */
-/*proto*
-*i bfd_fdopenr
-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.
-
-Possible errors are no_memory, invalid_target and system_call error.
-*; PROTO(bfd *, bfd_fdopenr,
- (CONST char *filename, CONST char *target, int fd));
-*-*/
+ the file descriptor too, even though we didn't open it. */
+/*
+FUNCTION
+ bfd_fdopenr
+
+SYNOPSIS
+ 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 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>>.
+*/
bfd *
-DEFUN(bfd_fdopenr,(filename, target, fd),
- CONST char *filename AND
- CONST char *target AND
- int fd)
+bfd_fdopenr (const char *filename, const char *target, int fd)
{
bfd *nbfd;
- bfd_target *target_vec;
+ const bfd_target *target_vec;
int fdflags;
-#ifdef BFD_LOCKS
- struct flock lock, *lockp = &lock;
-#endif
- bfd_error = system_call_error;
-
+ bfd_set_error (bfd_error_system_call);
+#if ! defined(HAVE_FCNTL) || ! defined(F_GETFL)
+ fdflags = O_RDWR; /* Assume full access. */
+#else
fdflags = fcntl (fd, F_GETFL, NULL);
- if (fdflags == -1) return NULL;
-
-#ifdef BFD_LOCKS
- lockp->l_type = F_RDLCK;
- if (fcntl (fd, F_SETLKW, lockp) == -1) return NULL;
#endif
-
- nbfd = new_bfd();
-
- if (nbfd == NULL) {
- bfd_error = no_memory;
+ if (fdflags == -1)
return NULL;
- }
- target_vec = bfd_find_target (target, nbfd);
- if (target_vec == NULL) {
- bfd_error = invalid_target;
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
return NULL;
- }
-#ifdef BFD_LOCKS
- nbfd->lock = (struct flock *) (nbfd + 1);
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+#ifndef HAVE_FDOPEN
+ nbfd->iostream = fopen (filename, FOPEN_RB);
+#else
+ /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */
+ switch (fdflags & (O_ACCMODE))
+ {
+ case O_RDONLY: nbfd->iostream = fdopen (fd, FOPEN_RB); break;
+ case O_WRONLY: nbfd->iostream = fdopen (fd, FOPEN_RUB); break;
+ case O_RDWR: nbfd->iostream = fdopen (fd, FOPEN_RUB); break;
+ default: abort ();
+ }
#endif
- /* if the fd were open for read only, this still would not hurt: */
- nbfd->iostream = (char *) fdopen (fd, "r+");
- if (nbfd->iostream == NULL) {
- (void) obstack_free (&nbfd->memory, (PTR)0);
- return NULL;
- }
-
- /* OK, put everything where it belongs */
+ if (nbfd->iostream == NULL)
+ {
+ _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. */
- switch (fdflags & O_ACCMODE) {
- 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 ();
- }
-
-#ifdef BFD_LOCKS
- memcpy (nbfd->lock, lockp, sizeof (struct flock))
-#endif
+ /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */
+ switch (fdflags & (O_ACCMODE))
+ {
+ 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 ();
+ }
+
+ if (! bfd_cache_init (nbfd))
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+ nbfd->opened_once = TRUE;
+
+ return nbfd;
+}
+
+/*
+FUNCTION
+ bfd_openstreamr
+
+SYNOPSIS
+ bfd *bfd_openstreamr (const char *, const char *, void *);
+
+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.
+*/
- bfd_cache_init (nbfd);
+bfd *
+bfd_openstreamr (const char *filename, const char *target, void *streamarg)
+{
+ FILE *stream = 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)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ nbfd->iostream = stream;
+ nbfd->filename = filename;
+ nbfd->direction = read_direction;
+
+ if (! bfd_cache_init (nbfd))
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ return nbfd;
+}
+
+/*
+FUNCTION
+ bfd_openr_iovec
+
+SYNOPSIS
+ bfd *bfd_openr_iovec (const char *filename, const char *target,
+ void *(*open) (struct bfd *nbfd,
+ void *open_closure),
+ void *open_closure,
+ file_ptr (*pread) (struct bfd *nbfd,
+ void *stream,
+ void *buf,
+ file_ptr nbytes,
+ file_ptr offset),
+ int (*close) (struct bfd *nbfd,
+ void *stream));
+
+DESCRIPTION
+
+ Create and return a BFD backed by a read-only @var{stream}.
+ The @var{stream} is created using @var{open}, accessed using
+ @var{pread} and destroyed using @var{close}.
+
+ Calls <<bfd_find_target>>, so @var{target} is interpreted as by
+ that function.
+
+ Calls @var{open} (which can call <<bfd_zalloc>> and
+ <<bfd_get_filename>>) to obtain the read-only stream backing
+ the BFD. @var{open} either succeeds returning the
+ non-<<NULL>> @var{stream}, or fails returning <<NULL>>
+ (setting <<bfd_error>>).
+
+ Calls @var{pread} to request @var{nbytes} of data from
+ @var{stream} starting at @var{offset} (e.g., via a call to
+ <<bfd_read>>). @var{pread} 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} when the BFD is later closed using
+ <<bfd_close>>. @var{close} either succeeds returning 0, or
+ fails returning -1 (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>>.
+
+*/
+
+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);
+ file_ptr where;
+};
+
+static file_ptr
+opncls_btell (struct bfd *abfd)
+{
+ struct opncls *vec = abfd->iostream;
+ return vec->where;
+}
+
+static int
+opncls_bseek (struct bfd *abfd, file_ptr offset, int whence)
+{
+ struct opncls *vec = 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 = 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 = 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 ATTRIBUTE_UNUSED, struct stat *sb)
+{
+ memset (sb, 0, sizeof (*sb));
+ return 0;
+}
+
+static const struct bfd_iovec opncls_iovec = {
+ &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek,
+ &opncls_bclose, &opncls_bflush, &opncls_bstat
+};
+
+bfd *
+bfd_openr_iovec (const char *filename, const char *target,
+ void *(*open) (struct bfd *nbfd,
+ void *open_closure),
+ void *open_closure,
+ file_ptr (*pread) (struct bfd *abfd,
+ void *stream,
+ void *buf,
+ file_ptr nbytes,
+ file_ptr offset),
+ int (*close) (struct bfd *nbfd,
+ void *stream))
+{
+ bfd *nbfd;
+ const bfd_target *target_vec;
+ struct opncls *vec;
+ void *stream;
+
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ return NULL;
+
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ nbfd->filename = filename;
+ nbfd->direction = read_direction;
+
+ stream = open (nbfd, open_closure);
+ if (stream == NULL)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ vec = bfd_zalloc (nbfd, sizeof (struct opncls));
+ vec->stream = stream;
+ vec->pread = pread;
+ vec->close = close;
+
+ 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
-/*proto* bfd_openw
-Creates a BFD, associated with file @var{filename}, using the file
-format @var{target}, and returns a pointer to it.
+SYNOPSIS
+ bfd *bfd_openw (const char *filename, const char *target);
-Possible errors are system_call_error, no_memory, invalid_target.
-*; PROTO(bfd *, bfd_openw, (CONST char *filename, CONST char *target));
+DESCRIPTION
+ Create a BFD, associated with file @var{filename}, using the
+ file format @var{target}, and return a pointer to it.
+
+ Possible errors are <<bfd_error_system_call>>, <<bfd_error_no_memory>>,
+ <<bfd_error_invalid_target>>.
*/
bfd *
-DEFUN(bfd_openw,(filename, target),
- CONST char *filename AND
- CONST char *target)
+bfd_openw (const char *filename, const char *target)
{
bfd *nbfd;
- bfd_target *target_vec;
-
- bfd_error = system_call_error;
+ const bfd_target *target_vec;
/* nbfd has to point to head of malloc'ed block so that bfd_close may
- reclaim it correctly. */
-
- nbfd = new_bfd();
- if (nbfd == NULL) {
- bfd_error = no_memory;
+ reclaim it correctly. */
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
return NULL;
- }
target_vec = bfd_find_target (target, nbfd);
- if (target_vec == NULL) return NULL;
+ if (target_vec == NULL)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
nbfd->filename = filename;
nbfd->direction = write_direction;
- if (bfd_open_file (nbfd) == NULL) {
- bfd_error = system_call_error; /* File not writeable, etc */
- (void) obstack_free (&nbfd->memory, (PTR)0);
- return NULL;
+ if (bfd_open_file (nbfd) == NULL)
+ {
+ /* File not writeable, etc. */
+ bfd_set_error (bfd_error_system_call);
+ _bfd_delete_bfd (nbfd);
+ return NULL;
}
+
return nbfd;
}
-/*proto* bfd_close
-This function closes 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 @code{chmod} is called to mark
-it as such.
+/*
+
+FUNCTION
+ bfd_close
-All memory attached to the BFD's obstacks is released.
+SYNOPSIS
+ bfd_boolean bfd_close (bfd *abfd);
-@code{true} is returned if all is ok, otherwise @code{false}.
-*; PROTO(boolean, bfd_close,(bfd *));
+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.
+
+ All memory attached to the BFD is released.
+
+ The file descriptor associated with the BFD is closed (even
+ if it was passed in to BFD by <<bfd_fdopenr>>).
+
+RETURNS
+ <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
*/
-boolean
-DEFUN(bfd_close,(abfd),
- bfd *abfd)
+
+bfd_boolean
+bfd_close (bfd *abfd)
{
- if (!bfd_read_p(abfd))
- if (BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)) != true)
- return false;
+ bfd_boolean ret;
+
+ if (bfd_write_p (abfd))
+ {
+ if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
+ return FALSE;
+ }
- if (BFD_SEND (abfd, _close_and_cleanup, (abfd)) != true) return false;
+ if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
+ return FALSE;
- bfd_cache_close(abfd);
+ /* FIXME: cagney/2004-02-15: Need to implement a BFD_IN_MEMORY io
+ vector. */
+ if (!(abfd->flags & BFD_IN_MEMORY))
+ ret = abfd->iovec->bclose (abfd);
+ else
+ ret = TRUE;
/* If the file was open for writing and is now executable,
- make it so */
- if (abfd->direction == write_direction
- && abfd->flags & EXEC_P) {
- struct stat buf;
- stat(abfd->filename, &buf);
-#ifndef S_IXUSR
-#define S_IXUSR 0100 /* Execute by owner. */
-#endif
-#ifndef S_IXGRP
-#define S_IXGRP 0010 /* Execute by group. */
-#endif
-#ifndef S_IXOTH
-#define S_IXOTH 0001 /* Execute by others. */
-#endif
+ make it so. */
+ if (ret
+ && abfd->direction == write_direction
+ && abfd->flags & EXEC_P)
+ {
+ struct stat buf;
+
+ if (stat (abfd->filename, &buf) == 0)
+ {
+ unsigned int mask = umask (0);
+
+ umask (mask);
+ chmod (abfd->filename,
+ (0777
+ & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
+ }
+ }
+
+ _bfd_delete_bfd (abfd);
+
+ return ret;
+}
- chmod(abfd->filename,buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH);
- }
- (void) obstack_free (&abfd->memory, (PTR)0);
- /* FIXME, shouldn't we de-allocate the bfd as well? */
- return true;
+/*
+FUNCTION
+ bfd_close_all_done
+
+SYNOPSIS
+ 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.
+
+ 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>>.
+*/
+
+bfd_boolean
+bfd_close_all_done (bfd *abfd)
+{
+ bfd_boolean ret;
+
+ 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)
+ {
+ unsigned int mask = umask (0);
+
+ umask (mask);
+ chmod (abfd->filename,
+ (0777
+ & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
+ }
+ }
+
+ _bfd_delete_bfd (abfd);
+
+ return ret;
}
-/*proto* bfd_create
-This routine creates a new BFD in the manner of @code{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 @code{bfd_object}.
+/*
+FUNCTION
+ bfd_create
-*; PROTO(bfd *, bfd_create, (CONST char *filename, bfd *template));
+SYNOPSIS
+ 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>>.
*/
bfd *
-DEFUN(bfd_create,(filename, template),
- CONST char *filename AND
- bfd *template)
+bfd_create (const char *filename, bfd *templ)
{
- bfd *nbfd = new_bfd();
- if (nbfd == (bfd *)NULL) {
- bfd_error = no_memory;
- return (bfd *)NULL;
- }
+ bfd *nbfd;
+
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ return NULL;
nbfd->filename = filename;
- if(template) {
- nbfd->xvec = template->xvec;
- }
+ if (templ)
+ nbfd->xvec = templ->xvec;
nbfd->direction = no_direction;
- bfd_set_format(nbfd, bfd_object);
+ bfd_set_format (nbfd, bfd_object);
+
return nbfd;
}
-/* Memory allocation */
+/*
+FUNCTION
+ bfd_make_writable
+
+SYNOPSIS
+ bfd_boolean bfd_make_writable (bfd *abfd);
+
+DESCRIPTION
+ Takes a BFD as created by <<bfd_create>> and converts it
+ into one like as returned by <<bfd_openw>>. It does this
+ by converting the BFD to BFD_IN_MEMORY. It's assumed that
+ you will call <<bfd_make_readable>> on this bfd later.
+
+RETURNS
+ <<TRUE>> is returned if all is ok, otherwise <<FALSE>>.
+*/
-DEFUN(PTR bfd_alloc_by_size_t,(abfd, size),
- bfd *abfd AND
- size_t size)
+bfd_boolean
+bfd_make_writable (bfd *abfd)
{
- PTR res = obstack_alloc(&(abfd->memory), size);
+ struct bfd_in_memory *bim;
+
+ if (abfd->direction != no_direction)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
+ }
+
+ bim = bfd_malloc (sizeof (struct bfd_in_memory));
+ abfd->iostream = bim;
+ /* bfd_bwrite will grow these as needed. */
+ bim->size = 0;
+ bim->buffer = 0;
+
+ abfd->flags |= BFD_IN_MEMORY;
+ abfd->direction = write_direction;
+ abfd->where = 0;
+
+ return TRUE;
+}
+
+/*
+FUNCTION
+ bfd_make_readable
+
+SYNOPSIS
+ bfd_boolean bfd_make_readable (bfd *abfd);
+
+DESCRIPTION
+ Takes a BFD as created by <<bfd_create>> and
+ <<bfd_make_writable>> and converts it into one like as
+ returned by <<bfd_openr>>. It does this by writing the
+ contents out to the memory buffer, then reversing the
+ direction.
+
+RETURNS
+ <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. */
+
+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;
+ }
+
+ if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)))
+ return FALSE;
+
+ if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
+ return FALSE;
+
+
+ abfd->arch_info = &bfd_default_arch_struct;
+
+ abfd->where = 0;
+ abfd->format = bfd_unknown;
+ abfd->my_archive = NULL;
+ abfd->origin = 0;
+ abfd->opened_once = FALSE;
+ abfd->output_has_begun = FALSE;
+ abfd->section_count = 0;
+ abfd->usrdata = NULL;
+ abfd->cacheable = FALSE;
+ abfd->flags = BFD_IN_MEMORY;
+ abfd->mtime_set = FALSE;
+
+ abfd->target_defaulted = TRUE;
+ abfd->direction = read_direction;
+ abfd->sections = 0;
+ abfd->symcount = 0;
+ abfd->outsymbols = 0;
+ abfd->tdata.any = 0;
+
+ bfd_section_list_clear (abfd);
+ bfd_check_format (abfd, bfd_object);
+
+ return TRUE;
+}
+
+/*
+INTERNAL_FUNCTION
+ bfd_alloc
+
+SYNOPSIS
+ 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.
+*/
+
+
+void *
+bfd_alloc (bfd *abfd, bfd_size_type size)
+{
+ void *ret;
+
+ if (size != (unsigned long) size)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+
+ ret = objalloc_alloc (abfd->memory, (unsigned long) size);
+ if (ret == NULL)
+ bfd_set_error (bfd_error_no_memory);
+ return ret;
+}
+
+void *
+bfd_zalloc (bfd *abfd, bfd_size_type size)
+{
+ void *res;
+
+ res = bfd_alloc (abfd, size);
+ if (res)
+ memset (res, 0, (size_t) size);
return res;
}
-DEFUN(void bfd_alloc_grow,(abfd, ptr, size),
- bfd *abfd AND
- PTR ptr AND
- bfd_size_type size)
+/* Free a block allocated for a BFD.
+ Note: Also frees all more recently allocated blocks! */
+
+void
+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"
+/*
+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
+ get_debug_link_info
+
+SYNOPSIS
+ char *get_debug_link_info (bfd *abfd, unsigned long *crc32_out);
+
+DESCRIPTION
+ fetch the filename and CRC32 value for any separate debuginfo
+ associated with @var{abfd}. Return NULL if no such info found,
+ otherwise return filename and update @var{crc32_out}.
+*/
+
+static char *
+get_debug_link_info (bfd *abfd, unsigned long *crc32_out)
{
- (void) obstack_grow(&(abfd->memory), ptr, size);
+ asection *sect;
+ unsigned long crc32;
+ bfd_byte *contents;
+ int crc_offset;
+
+ BFD_ASSERT (abfd);
+ BFD_ASSERT (crc32_out);
+
+ sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
+
+ if (sect == NULL)
+ return NULL;
+
+ if (!bfd_malloc_and_get_section (abfd, sect, &contents))
+ {
+ if (contents != NULL)
+ free (contents);
+ return NULL;
+ }
+
+ /* Crc value is stored after the filename, aligned up to 4 bytes. */
+ crc_offset = strlen (contents) + 1;
+ crc_offset = (crc_offset + 3) & ~3;
+
+ crc32 = bfd_get_32 (abfd, contents + crc_offset);
+
+ *crc32_out = crc32;
+ return contents;
}
-DEFUN(PTR bfd_alloc_finish,(abfd),
- bfd *abfd)
+
+/*
+INTERNAL_FUNCTION
+ separate_debug_file_exists
+
+SYNOPSIS
+ bfd_boolean separate_debug_file_exists
+ (char *name, unsigned long crc32);
+
+DESCRIPTION
+ Checks to see if @var{name} is a file and if its contents
+ match @var{crc32}.
+*/
+
+static bfd_boolean
+separate_debug_file_exists (const char *name, const unsigned long crc)
{
- return obstack_finish(&(abfd->memory));
+ static char buffer [8 * 1024];
+ unsigned long file_crc = 0;
+ int fd;
+ bfd_size_type count;
+
+ BFD_ASSERT (name);
+
+ fd = open (name, O_RDONLY);
+ if (fd < 0)
+ return FALSE;
+
+ while ((count = read (fd, buffer, sizeof (buffer))) > 0)
+ file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
+
+ close (fd);
+
+ return crc == file_crc;
}
-DEFUN(PTR bfd_alloc, (abfd, size),
- bfd *abfd AND
- bfd_size_type size)
+
+/*
+INTERNAL_FUNCTION
+ find_separate_debug_file
+
+SYNOPSIS
+ char *find_separate_debug_file (bfd *abfd);
+
+DESCRIPTION
+ Searches @var{abfd} for a reference to separate debugging
+ information, scans various locations in the filesystem, including
+ the file tree rooted at @var{debug_file_directory}, and returns a
+ filename of such debugging information if the file is found and has
+ matching CRC32. Returns NULL if no reference to debugging file
+ exists, or file cannot be found.
+*/
+
+static char *
+find_separate_debug_file (bfd *abfd, const char *debug_file_directory)
{
- return bfd_alloc_by_size_t(abfd, (size_t)size);
+ char *basename;
+ char *dir;
+ char *debugfile;
+ unsigned long crc32;
+ int i;
+
+ BFD_ASSERT (abfd);
+ if (debug_file_directory == NULL)
+ debug_file_directory = ".";
+
+ /* BFD may have been opened from a stream. */
+ if (! abfd->filename)
+ return NULL;
+
+ basename = get_debug_link_info (abfd, & crc32);
+ if (basename == NULL)
+ return NULL;
+
+ if (strlen (basename) < 1)
+ {
+ free (basename);
+ return NULL;
+ }
+
+ dir = strdup (abfd->filename);
+ if (dir == NULL)
+ {
+ free (basename);
+ return NULL;
+ }
+ BFD_ASSERT (strlen (dir) != 0);
+
+ /* Strip off filename part. */
+ for (i = strlen (dir) - 1; i >= 0; i--)
+ if (IS_DIR_SEPARATOR (dir[i]))
+ break;
+
+ dir[i + 1] = '\0';
+ BFD_ASSERT (dir[i] == '/' || dir[0] == '\0');
+
+ debugfile = malloc (strlen (debug_file_directory) + 1
+ + strlen (dir)
+ + strlen (".debug/")
+ + strlen (basename)
+ + 1);
+ if (debugfile == NULL)
+ {
+ free (basename);
+ free (dir);
+ return NULL;
+ }
+
+ /* First try in the same directory as the original file: */
+ strcpy (debugfile, dir);
+ strcat (debugfile, basename);
+
+ if (separate_debug_file_exists (debugfile, crc32))
+ {
+ free (basename);
+ free (dir);
+ return debugfile;
+ }
+
+ /* Then try in a subdirectory called .debug. */
+ strcpy (debugfile, dir);
+ strcat (debugfile, ".debug/");
+ strcat (debugfile, basename);
+
+ if (separate_debug_file_exists (debugfile, crc32))
+ {
+ free (basename);
+ free (dir);
+ return debugfile;
+ }
+
+ /* Then try in the global debugfile directory. */
+ strcpy (debugfile, debug_file_directory);
+ i = strlen (debug_file_directory) - 1;
+ if (i > 0
+ && debug_file_directory[i] != '/'
+ && dir[0] != '/')
+ strcat (debugfile, "/");
+ strcat (debugfile, dir);
+ strcat (debugfile, basename);
+
+ if (separate_debug_file_exists (debugfile, crc32))
+ {
+ free (basename);
+ free (dir);
+ return debugfile;
+ }
+
+ free (debugfile);
+ free (basename);
+ free (dir);
+ return NULL;
}
-DEFUN(PTR bfd_zalloc,(abfd, size),
- bfd *abfd AND
- bfd_size_type size)
+
+/*
+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, it will search a default path configured into
+ libbfd at build time. [XXX this feature is not currently
+ implemented].
+
+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)
{
- PTR res = bfd_alloc(abfd, size);
- memset(res, 0, (size_t)size);
- return res;
+#if 0 /* Disabled until DEBUGDIR can be defined by configure.in. */
+ if (dir == NULL)
+ dir = DEBUGDIR;
+#endif
+ return find_separate_debug_file (abfd, dir);
}
-DEFUN(PTR bfd_realloc,(abfd, old, size),
- bfd *abfd AND
- PTR old AND
- bfd_size_type size)
+/*
+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)
{
- PTR res = bfd_alloc(abfd, size);
- memcpy(res, old, (size_t)size);
- return res;
+ asection *sect;
+ bfd_size_type debuglink_size;
+
+ 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;
+ }
+
+ sect = bfd_make_section (abfd, GNU_DEBUGLINK);
+ if (sect == NULL)
+ return NULL;
+
+ if (! bfd_set_section_flags (abfd, sect,
+ SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING))
+ /* XXX Should we delete the section from the bfd ? */
+ return NULL;
+
+
+ debuglink_size = strlen (filename) + 1;
+ debuglink_size += 3;
+ debuglink_size &= ~3;
+ debuglink_size += 4;
+
+ if (! bfd_set_section_size (abfd, sect, debuglink_size))
+ /* XXX Should we delete the section from the bfd ? */
+ return NULL;
+
+ return sect;
}
-/*proto* bfd_alloc_size
-Return the number of bytes in the obstacks connected to the supplied
-BFD.
-*; PROTO(bfd_size_type,bfd_alloc_size,(bfd *abfd));
+
+/*
+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_size_type
-DEFUN( bfd_alloc_size,(abfd),
- bfd *abfd)
+bfd_boolean
+bfd_fill_in_gnu_debuglink_section (bfd *abfd,
+ struct bfd_section *sect,
+ const char *filename)
{
- struct _obstack_chunk *chunk = abfd->memory.chunk;
- size_t size = 0;
- while (chunk) {
- size += chunk->limit - &(chunk->contents[0]);
- chunk = chunk->prev;
- }
- return size;
+ bfd_size_type debuglink_size;
+ unsigned long crc32;
+ char * contents;
+ bfd_size_type crc_offset;
+ FILE * handle;
+ static char buffer[8 * 1024];
+ size_t count;
+
+ 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 = 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);
+
+ debuglink_size = strlen (filename) + 1;
+ debuglink_size += 3;
+ debuglink_size &= ~3;
+ debuglink_size += 4;
+
+ contents = malloc (debuglink_size);
+ if (contents == NULL)
+ {
+ /* XXX Should we delete the section from the bfd ? */
+ bfd_set_error (bfd_error_no_memory);
+ return FALSE;
+ }
+
+ strcpy (contents, filename);
+ crc_offset = debuglink_size - 4;
+
+ 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;
}
projects / deliverable / binutils-gdb.git / blobdiff