/* 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
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011
Free Software Foundation, Inc.
Written by Cygnus Support.
. 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;
if (abfd->arelt_data != NULL)
{
size_t maxbytes = ((struct areltdata *) abfd->arelt_data)->parsed_size;
- if (size > maxbytes)
- size = maxbytes;
+ if (abfd->where + size > maxbytes)
+ {
+ if (abfd->where >= maxbytes)
+ return 0;
+ size = maxbytes - abfd->where;
+ }
}
if (abfd->iovec)
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. */
{
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;
}