-/* opncls.c -- open and close a bfd. */
+/* opncls.c -- open and close a BFD.
+ Copyright (C) 1990 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
+ Written by Cygnus Support.
-/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
+This file is part of BFD, the Binary File Descriptor library.
-This file is part of BFD, the Binary File Diddler.
-
-BFD is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-BFD is distributed in the hope that it will be useful,
+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 BFD; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* $Id$ */
+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 "libbfd.h"
+#include "obstack.h"
-extern void bfd_cache_init();
-FILE *bfd_open_file();
+#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
/* fdopen is a loser -- we should use stdio exclusively. Unfortunately
if we do that we can't use fcntl. */
-\f
-/** 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.
-
- The reason that bfd_openr and bfd_fdopenr exist, yet only 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.
-
- Perhaps, since unix has so many different kinds of locking anyway,
- we should use the emacs lock scheme?... */
#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
/* Return a new BFD. All BFD's are allocated through this routine. */
-bfd *new_bfd()
+bfd *
+_bfd_new_bfd ()
{
- struct obstack tmp;
bfd *nbfd;
- obstack_begin(&tmp,128);
-
- nbfd = (bfd *)obstack_alloc(&tmp,sizeof(bfd));
- memset((PTR)nbfd, 0, sizeof (bfd)); /* Clear it */
- nbfd->memory = tmp;
+ nbfd = (bfd *)bfd_zmalloc (sizeof (bfd));
+ if (!nbfd)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return 0;
+ }
+
+ bfd_check_init();
+ if (!obstack_begin(&nbfd->memory, 128))
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return 0;
+ }
+
+ nbfd->arch_info = &bfd_default_arch_struct;
nbfd->direction = no_direction;
nbfd->iostream = NULL;
nbfd->sections = (asection *)NULL;
nbfd->format = bfd_unknown;
nbfd->my_archive = (bfd *)NULL;
- nbfd->origin = 0;
+ 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->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 (obfd)
+ 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();
+ nbfd->xvec = obfd->xvec;
+ nbfd->my_archive = obfd;
+ nbfd->direction = read_direction;
+ nbfd->target_defaulted = obfd->target_defaulted;
+ return nbfd;
}
-/** bfd_openr, bfd_fdopenr -- open for reading.
- Returns a pointer to a freshly-allocated bfd on success, or NULL. */
+/*
+SECTION
+ Opening and closing BFDs
+
+*/
+
+/*
+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 (filename, target)
+ CONST char *filename;
+ CONST char *target;
{
bfd *nbfd;
- bfd_target *target_vec;
+ const bfd_target *target_vec;
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) {
- bfd_error = invalid_target;
+ nbfd = _bfd_new_bfd();
+ if (nbfd == NULL) {
+ bfd_set_error (bfd_error_no_memory);
return NULL;
}
- bfd_error = system_call_error;
- nbfd = new_bfd();
- if (nbfd == NULL) {
- bfd_error = no_memory;
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) {
+ bfd_set_error (bfd_error_invalid_target);
return NULL;
}
nbfd->filename = filename;
- nbfd->xvec = target_vec;
- nbfd->direction = read_direction;
+ nbfd->direction = read_direction;
if (bfd_open_file (nbfd) == NULL) {
- bfd_error = system_call_error; /* File didn't exist, or some such */
+ bfd_set_error (bfd_error_system_call); /* File didn't exist, or some such */
bfd_release(nbfd,0);
return NULL;
}
close it if anything goes wrong. Closing the stream means closing
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 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 *
-DEFUN(bfd_fdopenr,(filename, target, fd),
- CONST char *filename AND
- CONST char *target AND
- int fd)
+bfd_fdopenr (filename, target, fd)
+ 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
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) {
- bfd_error = invalid_target;
- return NULL;
- }
+ bfd_set_error (bfd_error_system_call);
- bfd_error = system_call_error;
-
- fdflags = fcntl (fd, F_GETFL);
- if (fdflags == -1) return NULL;
-
-#ifdef BFD_LOCKS
- lockp->l_type = F_RDLCK;
- if (fcntl (fd, F_SETLKW, lockp) == -1) return NULL;
+#if ! defined(HAVE_FCNTL) || ! defined(F_GETFL)
+ fdflags = O_RDWR; /* Assume full access */
+#else
+ fdflags = fcntl (fd, F_GETFL, NULL);
#endif
+ if (fdflags == -1) return NULL;
- nbfd = new_bfd();
+ nbfd = _bfd_new_bfd();
if (nbfd == NULL) {
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return NULL;
}
-#ifdef BFD_LOCKS
- nbfd->lock = (struct flock *) (nbfd + 1);
+
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) {
+ bfd_set_error (bfd_error_invalid_target);
+ return NULL;
+ }
+#if defined(VMS) || defined(__GO32__) || defined (WIN32)
+ nbfd->iostream = (char *)fopen(filename, FOPEN_RB);
+#else
+ /* (O_ACCMODE) parens are to avoid Ultrix header file bug */
+ switch (fdflags & (O_ACCMODE)) {
+ case O_RDONLY: nbfd->iostream = (char *) fdopen (fd, FOPEN_RB); break;
+ case O_WRONLY: nbfd->iostream = (char *) fdopen (fd, FOPEN_RUB); break;
+ case O_RDWR: nbfd->iostream = (char *) 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 */
nbfd->filename = filename;
- nbfd->xvec = target_vec;
/* 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) {
+ /* (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_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
+
+ if (! bfd_cache_init (nbfd))
+ return NULL;
+
+ return nbfd;
+}
+
+/*
+FUNCTION
+ bfd_openstreamr
+
+SYNOPSIS
+ bfd *bfd_openstreamr();
+
+DESCRIPTION
- bfd_cache_init (nbfd);
+ 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 *
+bfd_openstreamr (filename, target, stream)
+ const char *filename;
+ const char *target;
+ FILE *stream;
+{
+ bfd *nbfd;
+ const bfd_target *target_vec;
+
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_target);
+ return NULL;
+ }
+
+ nbfd->iostream = (char *) stream;
+ nbfd->filename = filename;
+ nbfd->direction = read_direction;
+
+ if (! bfd_cache_init (nbfd))
+ return NULL;
return nbfd;
}
\f
/** bfd_openw -- open for writing.
- Returns a pointer to a freshly-allocated bfd on success, or NULL.
+ Returns a pointer to a freshly-allocated BFD on success, or NULL.
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);
+
+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 (filename, target)
+ CONST char *filename;
+ CONST char *target;
{
bfd *nbfd;
- bfd_target *target_vec;
-
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) return NULL;
+ const bfd_target *target_vec;
- bfd_error = system_call_error;
+ 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. */
- nbfd = new_bfd();
+ nbfd = _bfd_new_bfd();
if (nbfd == NULL) {
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return NULL;
}
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) return NULL;
+
nbfd->filename = filename;
- nbfd->xvec = target_vec;
nbfd->direction = write_direction;
if (bfd_open_file (nbfd) == NULL) {
- bfd_error = system_call_error; /* File not writeable, etc */
+ bfd_set_error (bfd_error_system_call); /* File not writeable, etc */
(void) obstack_free (&nbfd->memory, (PTR)0);
return NULL;
}
return nbfd;
}
+/*
+
+FUNCTION
+ bfd_close
+
+SYNOPSIS
+ 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.
+
+ All memory attached to the BFD's obstacks 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>>.
+*/
+
-\f
-/** Close up shop, get your deposit back. */
boolean
bfd_close (abfd)
bfd *abfd;
{
- if (BFD_SEND (abfd, _close_and_cleanup, (abfd)) != true) return false;
-
- bfd_cache_close(abfd);
-/* 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);
- chmod(abfd->filename,buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH);
- }
+ boolean ret;
+
+ if (!bfd_read_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))));
+ }
+ }
+
+ (void) obstack_free (&abfd->memory, (PTR)0);
+ (void) free (abfd);
+
+ return ret;
+}
+
+/*
+FUNCTION
+ bfd_close_all_done
+
+SYNOPSIS
+ 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's obstacks is released.
+
+RETURNS
+ <<true>> is returned if all is ok, otherwise <<false>>.
+
+*/
+
+boolean
+bfd_close_all_done (abfd)
+ bfd *abfd;
+{
+ 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)
+ {
+ int mask = umask (0);
+ umask (mask);
+ chmod (abfd->filename,
+ (0x777
+ & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask))));
+ }
+ }
(void) obstack_free (&abfd->memory, (PTR)0);
- return true;
+ (void) free(abfd);
+ return ret;
+}
+
+
+/*
+FUNCTION
+ bfd_alloc_size
+
+SYNOPSIS
+ bfd_size_type bfd_alloc_size(bfd *abfd);
+
+DESCRIPTION
+ Return the number of bytes in the obstacks connected to @var{abfd}.
+
+*/
+
+bfd_size_type
+bfd_alloc_size (abfd)
+ bfd *abfd;
+{
+ struct _obstack_chunk *chunk = abfd->memory.chunk;
+ size_t size = 0;
+ while (chunk) {
+ size += chunk->limit - &(chunk->contents[0]);
+ chunk = chunk->prev;
+ }
+ return size;
}
-/* Create a bfd with no associated file or target. */
+
+
+/*
+FUNCTION
+ bfd_create
+
+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
- CONST bfd *template)
+bfd_create (filename, templ)
+ CONST char *filename;
+ bfd *templ;
{
- bfd *nbfd = new_bfd();
+ bfd *nbfd = _bfd_new_bfd();
if (nbfd == (bfd *)NULL) {
- bfd_error = no_memory;
+ bfd_set_error (bfd_error_no_memory);
return (bfd *)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);
return nbfd;
}
-/* Memory allocation */
+/*
+INTERNAL_FUNCTION
+ bfd_alloc_by_size_t
-DEFUN(PTR bfd_alloc, (abfd, size),
- bfd *abfd AND
- bfd_size_type size)
+SYNOPSIS
+ PTR bfd_alloc_by_size_t(bfd *abfd, size_t wanted);
+
+DESCRIPTION
+ Allocate a block of @var{wanted} bytes of memory in the obstack
+ attatched to <<abfd>> and return a pointer to it.
+*/
+
+
+PTR
+bfd_alloc_by_size_t (abfd, size)
+ bfd *abfd;
+ size_t size;
{
- PTR res = obstack_alloc(&(abfd->memory), (int)size);
- return res;
+ return obstack_alloc(&(abfd->memory), size);
}
-DEFUN(PTR bfd_zalloc,(abfd, size),
- bfd *abfd AND
- bfd_size_type size)
+void
+bfd_alloc_grow (abfd, ptr, size)
+ bfd *abfd;
+ PTR ptr;
+ size_t size;
{
- PTR res = bfd_alloc(abfd, size);
- memset(res, 0, (size_t)size);
- return res;
+ (void) obstack_grow(&(abfd->memory), ptr, size);
}
-DEFUN(PTR bfd_realloc,(abfd, old, size),
- bfd *abfd AND
- PTR old AND
- bfd_size_type size)
+PTR
+bfd_alloc_finish (abfd)
+ bfd *abfd;
{
- PTR res = bfd_alloc(abfd, size);
- memcpy(res, old, (size_t)size);
- return res;
+ return obstack_finish(&(abfd->memory));
}
+PTR
+bfd_alloc (abfd, size)
+ bfd *abfd;
+ size_t size;
+{
+ return bfd_alloc_by_size_t(abfd, (size_t)size);
+}
-DEFUN(bfd_size_type bfd_alloc_size,(abfd),
- bfd *abfd)
+PTR
+bfd_zalloc (abfd, size)
+ bfd *abfd;
+ size_t size;
{
- struct _obstack_chunk *chunk = abfd->memory.chunk;
- size_t size = 0;
- while (chunk) {
- size += chunk->limit - &(chunk->contents[0]);
- chunk = chunk->prev;
- }
- return size;
+ PTR res;
+ res = bfd_alloc(abfd, size);
+ if (res)
+ memset(res, 0, (size_t)size);
+ return res;
}
projects / binutils.git / blobdiff