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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /bfd/opncls.c
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19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'bfd/opncls.c')
-rw-r--r--bfd/opncls.c683
1 files changed, 683 insertions, 0 deletions
diff --git a/bfd/opncls.c b/bfd/opncls.c
new file mode 100644
index 0000000..8f10135
--- /dev/null
+++ b/bfd/opncls.c
@@ -0,0 +1,683 @@
+/* opncls.c -- open and close a BFD.
+ Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 1997
+ Free Software Foundation, Inc.
+
+ Written by Cygnus Support.
+
+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 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. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "objalloc.h"
+#include "libbfd.h"
+
+#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. */
+
+/* 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 *nbfd;
+
+ nbfd = (bfd *) bfd_zmalloc (sizeof (bfd));
+ if (nbfd == NULL)
+ return NULL;
+
+ nbfd->memory = (PTR) objalloc_create ();
+ if (nbfd->memory == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ 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;
+
+ return nbfd;
+}
+
+/* Allocate a new BFD as a member of archive OBFD. */
+
+bfd *
+_bfd_new_bfd_contained_in (obfd)
+ bfd *obfd;
+{
+ 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;
+}
+
+/*
+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 *
+bfd_openr (filename, target)
+ CONST char *filename;
+ CONST char *target;
+{
+ 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_set_error (bfd_error_invalid_target);
+ return NULL;
+ }
+
+ nbfd->filename = filename;
+ nbfd->direction = read_direction;
+
+ if (bfd_open_file (nbfd) == NULL)
+ {
+ /* File didn't exist, or some such */
+ bfd_set_error (bfd_error_system_call);
+ objalloc_free ((struct objalloc *) nbfd->memory);
+ free (nbfd);
+ 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.
+ */
+/*
+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 *
+bfd_fdopenr (filename, target, fd)
+ CONST char *filename;
+ CONST char *target;
+ int fd;
+{
+ bfd *nbfd;
+ const bfd_target *target_vec;
+ int fdflags;
+
+ 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);
+#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)
+ {
+ bfd_set_error (bfd_error_invalid_target);
+ objalloc_free ((struct objalloc *) nbfd->memory);
+ free (nbfd);
+ return NULL;
+ }
+
+#ifndef HAVE_FDOPEN
+ nbfd->iostream = (PTR) fopen (filename, FOPEN_RB);
+#else
+ /* (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;
+ default: abort ();
+ }
+#endif
+
+ if (nbfd->iostream == NULL)
+ {
+ objalloc_free ((struct objalloc *) nbfd->memory);
+ free (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)
+ {
+ 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))
+ {
+ objalloc_free ((struct objalloc *) nbfd->memory);
+ free (nbfd);
+ return NULL;
+ }
+ nbfd->opened_once = true;
+
+ return nbfd;
+}
+
+/*
+FUNCTION
+ bfd_openstreamr
+
+SYNOPSIS
+ bfd *bfd_openstreamr(const char *, const char *, PTR);
+
+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 *
+bfd_openstreamr (filename, target, streamarg)
+ const char *filename;
+ const char *target;
+ PTR 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)
+ {
+ bfd_set_error (bfd_error_invalid_target);
+ objalloc_free ((struct objalloc *) nbfd->memory);
+ free (nbfd);
+ return NULL;
+ }
+
+ nbfd->iostream = (PTR) stream;
+ nbfd->filename = filename;
+ nbfd->direction = read_direction;
+
+ if (! bfd_cache_init (nbfd))
+ {
+ objalloc_free ((struct objalloc *) nbfd->memory);
+ free (nbfd);
+ return NULL;
+ }
+
+ return nbfd;
+}
+
+/** 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. */
+
+/*
+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 *
+bfd_openw (filename, target)
+ 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. */
+
+ 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);
+ return NULL;
+ }
+
+ nbfd->filename = filename;
+ 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);
+ 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 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
+bfd_close (abfd)
+ bfd *abfd;
+{
+ 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))));
+ }
+ }
+
+ objalloc_free ((struct objalloc *) abfd->memory);
+ 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 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))));
+ }
+ }
+
+ objalloc_free ((struct objalloc *) abfd->memory);
+ free (abfd);
+
+ return ret;
+}
+
+/*
+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 *
+bfd_create (filename, templ)
+ 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;
+ nbfd->direction = no_direction;
+ bfd_set_format (nbfd, bfd_object);
+ return nbfd;
+}
+
+/*
+FUNCTION
+ bfd_make_writable
+
+SYNOPSIS
+ 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>>.
+*/
+
+boolean
+bfd_make_writable(abfd)
+ bfd *abfd;
+{
+ struct bfd_in_memory *bim;
+
+ if (abfd->direction != no_direction)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ 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 */
+ 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
+ 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>>. */
+
+boolean
+bfd_make_readable(abfd)
+ 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->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->section_count = 0;
+ abfd->usrdata = (PTR) 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_check_format(abfd, bfd_object);
+
+ return true;
+}
+
+/*
+INTERNAL_FUNCTION
+ bfd_alloc
+
+SYNOPSIS
+ PTR bfd_alloc (bfd *abfd, size_t 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;
+{
+ PTR ret;
+
+ ret = objalloc_alloc (abfd->memory, (unsigned long) size);
+ if (ret == NULL)
+ bfd_set_error (bfd_error_no_memory);
+ return ret;
+}
+
+PTR
+bfd_zalloc (abfd, size)
+ bfd *abfd;
+ size_t size;
+{
+ PTR res;
+
+ res = bfd_alloc (abfd, size);
+ if (res)
+ memset (res, 0, size);
+ return res;
+}
+
+/* Free a block allocated for a BFD. */
+
+void
+bfd_release (abfd, block)
+ bfd *abfd;
+ PTR block;
+{
+ objalloc_free_block ((struct objalloc *) abfd->memory, block);
+}