-/* opncls.c -- open and close a bfd. */
+/* opncls.c -- open and close a BFD.
+ Copyright (C) 1990-1991 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. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* $Id$ */
-#include <sysdep.h>
#include "bfd.h"
+#include "sysdep.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. */
-\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_alloc bfd_xmalloc
#define obstack_chunk_free free
/* Return a new BFD. All BFD's are allocated through this routine. */
if (!nbfd)
return 0;
+ bfd_check_init();
obstack_begin((PTR)&nbfd->memory, 128);
-
+
+ nbfd->arch_info = &bfd_default_arch_struct;
+
nbfd->direction = no_direction;
nbfd->iostream = NULL;
nbfd->where = 0;
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
+ This function opens the file supplied (using <<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.
+*/
bfd *
DEFUN(bfd_openr, (filename, target),
bfd *nbfd;
bfd_target *target_vec;
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) {
- bfd_error = invalid_target;
- return NULL;
- }
-
- bfd_error = system_call_error;
nbfd = new_bfd();
if (nbfd == NULL) {
bfd_error = no_memory;
return NULL;
}
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) {
+ bfd_error = invalid_target;
+ return NULL;
+ }
+
nbfd->filename = filename;
- nbfd->xvec = target_vec;
nbfd->direction = read_direction;
if (bfd_open_file (nbfd) == 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.
+
+ Possible errors are no_memory, invalid_target and system_call
+ error.
+*/
bfd *
DEFUN(bfd_fdopenr,(filename, target, fd),
bfd *nbfd;
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_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;
+#ifdef NO_FCNTL
+ fdflags = O_RDWR; /* Assume full access */
+#else
+ fdflags = fcntl (fd, F_GETFL, NULL);
#endif
+ if (fdflags == -1) return NULL;
nbfd = new_bfd();
bfd_error = no_memory;
return NULL;
}
-#ifdef BFD_LOCKS
- nbfd->lock = (struct flock *) (nbfd + 1);
-#endif
+
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) {
+ bfd_error = invalid_target;
+ return NULL;
+ }
+
+#ifdef FASCIST_FDOPEN
+ nbfd->iostream = (char *) fdopen (fd, "rb");
+#else
/* if the fd were open for read only, this still would not hurt: */
- nbfd->iostream = (char *) fdopen (fd, "r+");
+ nbfd->iostream = (char *) fdopen (fd, "r+b");
+#endif
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_RDWR: nbfd->direction = both_direction; break;
default: abort ();
}
-#ifdef BFD_LOCKS
- memcpy (nbfd->lock, lockp, sizeof (struct flock))
-#endif
-
- bfd_cache_init (nbfd);
+ bfd_cache_init (nbfd);
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
+ Creates a BFD, associated with file @var{filename}, using the
+ file format @var{target}, and returns a pointer to it.
+
+ Possible errors are system_call_error, no_memory,
+ invalid_target.
+*/
+
bfd *
DEFUN(bfd_openw,(filename, target),
CONST char *filename AND
bfd *nbfd;
bfd_target *target_vec;
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) return NULL;
-
bfd_error = system_call_error;
/* nbfd has to point to head of malloc'ed block so that bfd_close may
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) {
return nbfd;
}
+/*
+
+FUNCTION
+ bfd_close
+
+SYNOPSIS
+ boolean bfd_close(bfd *);
+
+DESCRIPTION
+
+ 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
+ <<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>>.
+*/
+
-\f
-/** Close up shop, get your deposit back. */
boolean
-bfd_close (abfd)
- bfd *abfd;
+DEFUN(bfd_close,(abfd),
+ bfd *abfd)
{
if (!bfd_read_p(abfd))
if (BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)) != true)
#define S_IXOTH 0001 /* Execute by others. */
#endif
- chmod(abfd->filename,buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH);
+ chmod(abfd->filename, 0777 & (buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH));
+ }
+ (void) obstack_free (&abfd->memory, (PTR)0);
+ (void) free(abfd);
+ return true;
+}
+
+/*
+FUNCTION
+ bfd_close_all_done
+
+SYNOPSIS
+ boolean bfd_close_all_done(bfd *);
+
+DESCRIPTION
+ This function closes a BFD. It 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
+DEFUN(bfd_close_all_done,(abfd),
+ bfd *abfd)
+{
+ 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);
+#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
+
+ chmod(abfd->filename, 0x777 &(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? */
+ (void) free(abfd);
return true;
}
-/* Create a bfd with no associated file or target. */
+
+/*
+FUNCTION
+ bfd_alloc_size
+
+SYNOPSIS
+ bfd_size_type bfd_alloc_size(bfd *abfd);
+
+DESCRIPTION
+ Return the number of bytes in the obstacks connected to the
+ supplied BFD.
+
+*/
+
+bfd_size_type
+DEFUN(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;
+}
+
+
+
+/*
+FUNCTION
+ bfd_create
+
+SYNOPSIS
+ bfd *bfd_create(CONST char *filename, bfd *template);
+
+DESCRIPTION
+ This routine creates 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 *template)
{
bfd *nbfd = new_bfd();
if (nbfd == (bfd *)NULL) {
return nbfd;
}
-/* Memory allocation */
+/*
+INTERNAL_FUNCTION
+ bfd_alloc_by_size_t
+
+SYNOPSIS
+ PTR bfd_alloc_by_size_t(bfd *abfd, size_t wanted);
+
+DESCRIPTION
+ This function allocates a block of memory in the obstack
+ attatched to <<abfd>> and returns a pointer to it.
+*/
+
-DEFUN(PTR bfd_alloc_by_size_t,(abfd, size),
+PTR
+DEFUN(bfd_alloc_by_size_t,(abfd, size),
bfd *abfd AND
size_t size)
{
PTR res = obstack_alloc(&(abfd->memory), size);
return res;
}
+
+DEFUN(void bfd_alloc_grow,(abfd, ptr, size),
+ bfd *abfd AND
+ PTR ptr AND
+ bfd_size_type size)
+{
+ (void) obstack_grow(&(abfd->memory), ptr, size);
+}
+DEFUN(PTR bfd_alloc_finish,(abfd),
+ bfd *abfd)
+{
+ return obstack_finish(&(abfd->memory));
+}
+
DEFUN(PTR bfd_alloc, (abfd, size),
bfd *abfd AND
bfd_size_type size)
}
-DEFUN(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;
-}
+
+
+
+
+
+
+
+
projects / binutils.git / blobdiff