/* Low-level I/O routines for BFDs.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 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 "sysdep.h"
-
+#include <limits.h>
#include "bfd.h"
#include "libbfd.h"
-#include <limits.h>
-
#ifndef S_IXUSR
#define S_IXUSR 0100 /* Execute by owner. */
#endif
#define S_IXOTH 0001 /* Execute by others. */
#endif
+#ifndef FD_CLOEXEC
+#define FD_CLOEXEC 1
+#endif
+
file_ptr
real_ftell (FILE *file)
{
#endif
}
+/* Mark FILE as close-on-exec. Return FILE. FILE may be NULL, in
+ which case nothing is done. */
+static FILE *
+close_on_exec (FILE *file)
+{
+#if defined (HAVE_FILENO) && defined (F_GETFD)
+ if (file)
+ {
+ int fd = fileno (file);
+ int old = fcntl (fd, F_GETFD, 0);
+ if (old >= 0)
+ fcntl (fd, F_SETFD, old | FD_CLOEXEC);
+ }
+#endif
+ return file;
+}
+
+FILE *
+real_fopen (const char *filename, const char *modes)
+{
+#ifdef VMS
+ char vms_modes[4];
+ char *vms_attr;
+
+ /* On VMS, fopen allows file attributes as optionnal arguments.
+ We need to use them but we'd better to use the common prototype.
+ In fopen-vms.h, they are separated from the mode with a comma.
+ Split here. */
+ vms_attr = strchr (modes, ',');
+ if (vms_attr == NULL)
+ {
+ /* No attributes. */
+ return close_on_exec (fopen (filename, modes));
+ }
+ else
+ {
+ /* Attributes found. Split. */
+ size_t modes_len = strlen (modes) + 1;
+ char attrs[modes_len + 1];
+ char *at[3];
+ int i;
+
+ memcpy (attrs, modes, modes_len);
+ at[0] = attrs;
+ for (i = 0; i < 2; i++)
+ {
+ at[i + 1] = strchr (at[i], ',');
+ BFD_ASSERT (at[i + 1] != NULL);
+ *(at[i + 1]++) = 0; /* Replace ',' with a nul, and skip it. */
+ }
+ return close_on_exec (fopen (filename, at[0], at[1], at[2]));
+ }
+#else /* !VMS */
+#if defined (HAVE_FOPEN64)
+ return close_on_exec (fopen64 (filename, modes));
+#else
+ return close_on_exec (fopen (filename, modes));
+#endif
+#endif /* !VMS */
+}
+
/*
INTERNAL_DEFINITION
struct bfd_iovec
. int (*bclose) (struct bfd *abfd);
. int (*bflush) (struct bfd *abfd);
. int (*bstat) (struct bfd *abfd, struct stat *sb);
+. {* Just like mmap: (void*)-1 on failure, mmapped address on success. *}
+. void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len,
+. int prot, int flags, file_ptr offset);
.};
*/
{
size_t nread;
+ /* If this is an archive element, don't read past the end of
+ this element. */
+ if (abfd->arelt_data != NULL)
+ {
+ size_t maxbytes = ((struct areltdata *) abfd->arelt_data)->parsed_size;
+ if (size > maxbytes)
+ size = maxbytes;
+ }
+
if ((abfd->flags & BFD_IN_MEMORY) != 0)
{
struct bfd_in_memory *bim;
return get;
}
- nread = abfd->iovec->bread (abfd, ptr, size);
+ if (abfd->iovec)
+ nread = abfd->iovec->bread (abfd, ptr, size);
+ else
+ nread = 0;
if (nread != (size_t) -1)
abfd->where += nread;
if ((abfd->flags & BFD_IN_MEMORY) != 0)
{
struct bfd_in_memory *bim = abfd->iostream;
+
size = (size_t) size;
if (abfd->where + size > bim->size)
{
newsize = (bim->size + 127) & ~(bfd_size_type) 127;
if (newsize > oldsize)
{
- bim->buffer = bfd_realloc (bim->buffer, newsize);
- if (bim->buffer == 0)
+ bim->buffer = bfd_realloc_or_free (bim->buffer, newsize);
+ if (bim->buffer == NULL)
{
bim->size = 0;
return 0;
}
+ if (newsize > bim->size)
+ memset (bim->buffer + bim->size, 0, newsize - bim->size);
}
}
memcpy (bim->buffer + abfd->where, ptr, (size_t) size);
return size;
}
- nwrote = abfd->iovec->bwrite (abfd, ptr, size);
+ if (abfd->iovec)
+ nwrote = abfd->iovec->bwrite (abfd, ptr, size);
+ else
+ nwrote = 0;
+
if (nwrote != (size_t) -1)
abfd->where += nwrote;
if (nwrote != size)
if ((abfd->flags & BFD_IN_MEMORY) != 0)
return abfd->where;
- ptr = abfd->iovec->btell (abfd);
+ if (abfd->iovec)
+ {
+ ptr = abfd->iovec->btell (abfd);
+
+ if (abfd->my_archive)
+ ptr -= abfd->origin;
+ }
+ else
+ ptr = 0;
- if (abfd->my_archive)
- ptr -= abfd->origin;
abfd->where = ptr;
return ptr;
}
{
if ((abfd->flags & BFD_IN_MEMORY) != 0)
return 0;
- return abfd->iovec->bflush (abfd);
+
+ if (abfd->iovec)
+ return abfd->iovec->bflush (abfd);
+ return 0;
}
/* Returns 0 for success, negative value for failure (in which case
if ((abfd->flags & BFD_IN_MEMORY) != 0)
abort ();
- result = abfd->iovec->bstat (abfd, statbuf);
+ if (abfd->iovec)
+ result = abfd->iovec->bstat (abfd, statbuf);
+ else
+ result = -1;
+
if (result < 0)
bfd_set_error (bfd_error_system_call);
return result;
if (abfd->where > bim->size)
{
- if ((abfd->direction == write_direction) ||
- (abfd->direction == both_direction))
+ if (abfd->direction == write_direction
+ || abfd->direction == both_direction)
{
bfd_size_type newsize, oldsize;
+
oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
bim->size = abfd->where;
/* Round up to cut down on memory fragmentation */
newsize = (bim->size + 127) & ~(bfd_size_type) 127;
if (newsize > oldsize)
{
- bim->buffer = bfd_realloc (bim->buffer, newsize);
- if (bim->buffer == 0)
+ bim->buffer = bfd_realloc_or_free (bim->buffer, newsize);
+ if (bim->buffer == NULL)
{
bim->size = 0;
return -1;
}
+ memset (bim->buffer + oldsize, 0, newsize - oldsize);
}
}
else
if (abfd->format != bfd_archive && abfd->my_archive == 0)
{
-#if 0
- /* Explanation for this code: I'm only about 95+% sure that the above
- conditions are sufficient and that all i/o calls are properly
- adjusting the `where' field. So this is sort of an `assert'
- that the `where' field is correct. If we can go a while without
- tripping the abort, we can probably safely disable this code,
- so that the real optimizations happen. */
- file_ptr where_am_i_now;
- where_am_i_now = real_ftell (bfd_cache_lookup (abfd));
- if (abfd->my_archive)
- where_am_i_now -= abfd->origin;
- if (where_am_i_now != abfd->where)
- abort ();
-#endif
if (direction == SEEK_SET && (bfd_vma) position == abfd->where)
return 0;
}
if (direction == SEEK_SET && abfd->my_archive != NULL)
file_position += abfd->origin;
- result = abfd->iovec->bseek (abfd, file_position, direction);
+ if (abfd->iovec)
+ result = abfd->iovec->bseek (abfd, file_position, direction);
+ else
+ result = -1;
+
if (result != 0)
{
int hold_errno = errno;
if (abfd->mtime_set)
return abfd->mtime;
+ if (abfd->iovec == NULL)
+ return 0;
+
if (abfd->iovec->bstat (abfd, &buf) != 0)
return 0;
bfd_get_size
SYNOPSIS
- long bfd_get_size (bfd *abfd);
+ file_ptr bfd_get_size (bfd *abfd);
DESCRIPTION
Return the file size (as read from file system) for the file
size reasonable?".
*/
-long
+file_ptr
bfd_get_size (bfd *abfd)
{
struct stat buf;
if ((abfd->flags & BFD_IN_MEMORY) != 0)
return ((struct bfd_in_memory *) abfd->iostream)->size;
+ if (abfd->iovec == NULL)
+ return 0;
+
if (abfd->iovec->bstat (abfd, &buf) != 0)
return 0;
return buf.st_size;
}
+
+
+/*
+FUNCTION
+ bfd_mmap
+
+SYNOPSIS
+ void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
+ int prot, int flags, file_ptr offset);
+
+DESCRIPTION
+ Return mmap()ed region of the file, if possible and implemented.
+
+*/
+
+void *
+bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
+ int prot, int flags, file_ptr offset)
+{
+ void *ret = (void *)-1;
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ return ret;
+
+ if (abfd->iovec == NULL)
+ return ret;
+
+ return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset);
+}
projects / deliverable / binutils-gdb.git / blobdiff