/* Low-level I/O routines for BFDs.
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 1990-2015 Free Software Foundation, Inc.
Written by Cygnus Support.
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.
+ /* On VMS, fopen allows file attributes as optional 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. */
. 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. *}
+. {* Mmap a part of the files. ADDR, LEN, PROT, FLAGS and OFFSET are the usual
+. mmap parameter, except that LEN and OFFSET do not need to be page
+. aligned. Returns (void *)-1 on failure, mmapped address on success.
+. Also write in MAP_ADDR the address of the page aligned buffer and in
+. MAP_LEN the size mapped (a page multiple). Use unmap with MAP_ADDR and
+. MAP_LEN to unmap. *}
. void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len,
-. int prot, int flags, file_ptr offset);
+. int prot, int flags, file_ptr offset,
+. void **map_addr, bfd_size_type *map_len);
.};
.extern const struct bfd_iovec _bfd_memory_iovec;
this element. */
if (abfd->arelt_data != NULL)
{
- size_t maxbytes = ((struct areltdata *) abfd->arelt_data)->parsed_size;
- if (size > maxbytes)
- size = maxbytes;
+ bfd_size_type maxbytes = arelt_size (abfd);
+
+ if (abfd->where + size > maxbytes)
+ {
+ if (abfd->where >= maxbytes)
+ return 0;
+ size = maxbytes - abfd->where;
+ }
}
if (abfd->iovec)
if (abfd->iovec)
{
+ bfd *parent_bfd = abfd;
ptr = abfd->iovec->btell (abfd);
- if (abfd->my_archive)
- ptr -= abfd->origin;
+ while (parent_bfd->my_archive != NULL)
+ {
+ ptr -= parent_bfd->origin;
+ parent_bfd = parent_bfd->my_archive;
+ }
}
else
ptr = 0;
}
file_position = position;
- if (direction == SEEK_SET && abfd->my_archive != NULL)
- file_position += abfd->origin;
+ if (direction == SEEK_SET)
+ {
+ bfd *parent_bfd = abfd;
+
+ while (parent_bfd->my_archive != NULL)
+ {
+ file_position += parent_bfd->origin;
+ parent_bfd = parent_bfd->my_archive;
+ }
+ }
if (abfd->iovec)
result = abfd->iovec->bseek (abfd, file_position, direction);
SYNOPSIS
void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
- int prot, int flags, file_ptr offset);
+ int prot, int flags, file_ptr offset,
+ void **map_addr, bfd_size_type *map_len);
DESCRIPTION
Return mmap()ed region of the file, if possible and implemented.
+ LEN and OFFSET do not need to be page aligned. The page aligned
+ address and length are written to MAP_ADDR and MAP_LEN.
*/
void *
bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
- int prot, int flags, file_ptr offset)
+ int prot, int flags, file_ptr offset,
+ void **map_addr, bfd_size_type *map_len)
{
void *ret = (void *)-1;
if (abfd->iovec == NULL)
return ret;
- return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset);
+ return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset,
+ map_addr, map_len);
}
/* Memory file I/O operations. */
free (bim);
abfd->iostream = NULL;
- return TRUE;
+ return 0;
}
static int
{
struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream;
- memset (statbuf, 0, sizeof (statbuf));
+ memset (statbuf, 0, sizeof (*statbuf));
statbuf->st_size = bim->size;
return 0;
static void *
memory_bmmap (bfd *abfd ATTRIBUTE_UNUSED, void *addr ATTRIBUTE_UNUSED,
bfd_size_type len ATTRIBUTE_UNUSED, int prot ATTRIBUTE_UNUSED,
- int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED)
+ int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED,
+ void **map_addr ATTRIBUTE_UNUSED,
+ bfd_size_type *map_len ATTRIBUTE_UNUSED)
{
return (void *)-1;
}