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-rw-r--r--contrib/binutils/bfd/bfdio.c442
1 files changed, 0 insertions, 442 deletions
diff --git a/contrib/binutils/bfd/bfdio.c b/contrib/binutils/bfd/bfdio.c
deleted file mode 100644
index a90cb33..0000000
--- a/contrib/binutils/bfd/bfdio.c
+++ /dev/null
@@ -1,442 +0,0 @@
-/* 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.
-
- 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 "sysdep.h"
-
-#include "bfd.h"
-#include "libbfd.h"
-
-#include <limits.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
-
-file_ptr
-real_ftell (FILE *file)
-{
-#if defined (HAVE_FTELLO64)
- return ftello64 (file);
-#elif defined (HAVE_FTELLO)
- return ftello (file);
-#else
- return ftell (file);
-#endif
-}
-
-int
-real_fseek (FILE *file, file_ptr offset, int whence)
-{
-#if defined (HAVE_FSEEKO64)
- return fseeko64 (file, offset, whence);
-#elif defined (HAVE_FSEEKO)
- return fseeko (file, offset, whence);
-#else
- return fseek (file, offset, whence);
-#endif
-}
-
-/* Note that archive entries don't have streams; they share their parent's.
- This allows someone to play with the iostream behind BFD's back.
-
- Also, note that the origin pointer points to the beginning of a file's
- contents (0 for non-archive elements). For archive entries this is the
- first octet in the file, NOT the beginning of the archive header. */
-
-static size_t
-real_read (void *where, size_t a, size_t b, FILE *file)
-{
- /* FIXME - this looks like an optimization, but it's really to cover
- up for a feature of some OSs (not solaris - sigh) that
- ld/pe-dll.c takes advantage of (apparently) when it creates BFDs
- internally and tries to link against them. BFD seems to be smart
- enough to realize there are no symbol records in the "file" that
- doesn't exist but attempts to read them anyway. On Solaris,
- attempting to read zero bytes from a NULL file results in a core
- dump, but on other platforms it just returns zero bytes read.
- This makes it to something reasonable. - DJ */
- if (a == 0 || b == 0)
- return 0;
-
-
-#if defined (__VAX) && defined (VMS)
- /* Apparently fread on Vax VMS does not keep the record length
- information. */
- return read (fileno (file), where, a * b);
-#else
- return fread (where, a, b, file);
-#endif
-}
-
-/* Return value is amount read. */
-
-bfd_size_type
-bfd_bread (void *ptr, bfd_size_type size, bfd *abfd)
-{
- size_t nread;
-
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- {
- struct bfd_in_memory *bim;
- bfd_size_type get;
-
- bim = abfd->iostream;
- get = size;
- if (abfd->where + get > bim->size)
- {
- if (bim->size < (bfd_size_type) abfd->where)
- get = 0;
- else
- get = bim->size - abfd->where;
- bfd_set_error (bfd_error_file_truncated);
- }
- memcpy (ptr, bim->buffer + abfd->where, (size_t) get);
- abfd->where += get;
- return get;
- }
-
- nread = real_read (ptr, 1, (size_t) size, bfd_cache_lookup (abfd));
- if (nread != (size_t) -1)
- abfd->where += nread;
-
- /* Set bfd_error if we did not read as much data as we expected.
-
- If the read failed due to an error set the bfd_error_system_call,
- else set bfd_error_file_truncated.
-
- A BFD backend may wish to override bfd_error_file_truncated to
- provide something more useful (eg. no_symbols or wrong_format). */
- if (nread != size)
- {
- if (ferror (bfd_cache_lookup (abfd)))
- bfd_set_error (bfd_error_system_call);
- else
- bfd_set_error (bfd_error_file_truncated);
- }
-
- return nread;
-}
-
-bfd_size_type
-bfd_bwrite (const void *ptr, bfd_size_type size, bfd *abfd)
-{
- size_t nwrote;
-
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- {
- struct bfd_in_memory *bim = abfd->iostream;
- size = (size_t) size;
- if (abfd->where + size > bim->size)
- {
- bfd_size_type newsize, oldsize;
-
- oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
- bim->size = abfd->where + size;
- /* 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->size = 0;
- return 0;
- }
- }
- }
- memcpy (bim->buffer + abfd->where, ptr, (size_t) size);
- abfd->where += size;
- return size;
- }
-
- nwrote = fwrite (ptr, 1, (size_t) size, bfd_cache_lookup (abfd));
- if (nwrote != (size_t) -1)
- abfd->where += nwrote;
- if (nwrote != size)
- {
-#ifdef ENOSPC
- errno = ENOSPC;
-#endif
- bfd_set_error (bfd_error_system_call);
- }
- return nwrote;
-}
-
-file_ptr
-bfd_tell (bfd *abfd)
-{
- file_ptr ptr;
-
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- return abfd->where;
-
- ptr = real_ftell (bfd_cache_lookup (abfd));
-
- if (abfd->my_archive)
- ptr -= abfd->origin;
- abfd->where = ptr;
- return ptr;
-}
-
-int
-bfd_flush (bfd *abfd)
-{
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- return 0;
- return fflush (bfd_cache_lookup(abfd));
-}
-
-/* Returns 0 for success, negative value for failure (in which case
- bfd_get_error can retrieve the error code). */
-int
-bfd_stat (bfd *abfd, struct stat *statbuf)
-{
- FILE *f;
- int result;
-
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- abort ();
-
- f = bfd_cache_lookup (abfd);
- if (f == NULL)
- {
- bfd_set_error (bfd_error_system_call);
- return -1;
- }
- result = fstat (fileno (f), statbuf);
- if (result < 0)
- bfd_set_error (bfd_error_system_call);
- return result;
-}
-
-/* Returns 0 for success, nonzero for failure (in which case bfd_get_error
- can retrieve the error code). */
-
-int
-bfd_seek (bfd *abfd, file_ptr position, int direction)
-{
- int result;
- FILE *f;
- file_ptr file_position;
- /* For the time being, a BFD may not seek to it's end. The problem
- is that we don't easily have a way to recognize the end of an
- element in an archive. */
-
- BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR);
-
- if (direction == SEEK_CUR && position == 0)
- return 0;
-
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- {
- struct bfd_in_memory *bim;
-
- bim = abfd->iostream;
-
- if (direction == SEEK_SET)
- abfd->where = position;
- else
- abfd->where += position;
-
- if (abfd->where > bim->size)
- {
- 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->size = 0;
- return -1;
- }
- }
- }
- else
- {
- abfd->where = bim->size;
- bfd_set_error (bfd_error_file_truncated);
- return -1;
- }
- }
- return 0;
- }
-
- 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;
- }
- else
- {
- /* We need something smarter to optimize access to archives.
- Currently, anything inside an archive is read via the file
- handle for the archive. Which means that a bfd_seek on one
- component affects the `current position' in the archive, as
- well as in any other component.
-
- It might be sufficient to put a spike through the cache
- abstraction, and look to the archive for the file position,
- but I think we should try for something cleaner.
-
- In the meantime, no optimization for archives. */
- }
-
- f = bfd_cache_lookup (abfd);
- file_position = position;
- if (direction == SEEK_SET && abfd->my_archive != NULL)
- file_position += abfd->origin;
-
- result = real_fseek (f, file_position, direction);
- if (result != 0)
- {
- int hold_errno = errno;
-
- /* Force redetermination of `where' field. */
- bfd_tell (abfd);
-
- /* An EINVAL error probably means that the file offset was
- absurd. */
- if (hold_errno == EINVAL)
- bfd_set_error (bfd_error_file_truncated);
- else
- {
- bfd_set_error (bfd_error_system_call);
- errno = hold_errno;
- }
- }
- else
- {
- /* Adjust `where' field. */
- if (direction == SEEK_SET)
- abfd->where = position;
- else
- abfd->where += position;
- }
- return result;
-}
-
-/*
-FUNCTION
- bfd_get_mtime
-
-SYNOPSIS
- long bfd_get_mtime (bfd *abfd);
-
-DESCRIPTION
- Return the file modification time (as read from the file system, or
- from the archive header for archive members).
-
-*/
-
-long
-bfd_get_mtime (bfd *abfd)
-{
- FILE *fp;
- struct stat buf;
-
- if (abfd->mtime_set)
- return abfd->mtime;
-
- fp = bfd_cache_lookup (abfd);
- if (0 != fstat (fileno (fp), &buf))
- return 0;
-
- abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */
- return buf.st_mtime;
-}
-
-/*
-FUNCTION
- bfd_get_size
-
-SYNOPSIS
- long bfd_get_size (bfd *abfd);
-
-DESCRIPTION
- Return the file size (as read from file system) for the file
- associated with BFD @var{abfd}.
-
- The initial motivation for, and use of, this routine is not
- so we can get the exact size of the object the BFD applies to, since
- that might not be generally possible (archive members for example).
- It would be ideal if someone could eventually modify
- it so that such results were guaranteed.
-
- Instead, we want to ask questions like "is this NNN byte sized
- object I'm about to try read from file offset YYY reasonable?"
- As as example of where we might do this, some object formats
- use string tables for which the first <<sizeof (long)>> bytes of the
- table contain the size of the table itself, including the size bytes.
- If an application tries to read what it thinks is one of these
- string tables, without some way to validate the size, and for
- some reason the size is wrong (byte swapping error, wrong location
- for the string table, etc.), the only clue is likely to be a read
- error when it tries to read the table, or a "virtual memory
- exhausted" error when it tries to allocate 15 bazillon bytes
- of space for the 15 bazillon byte table it is about to read.
- This function at least allows us to answer the question, "is the
- size reasonable?".
-*/
-
-long
-bfd_get_size (bfd *abfd)
-{
- FILE *fp;
- struct stat buf;
-
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- return ((struct bfd_in_memory *) abfd->iostream)->size;
-
- fp = bfd_cache_lookup (abfd);
- if (0 != fstat (fileno (fp), & buf))
- return 0;
-
- return buf.st_size;
-}
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