/* BFD library -- caching of file descriptors.
Copyright 1990, 1991, 1992, 1993, 1994, 1996, 2000, 2001, 2002,
- 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
Hacked by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
#include "libbfd.h"
#include "libiberty.h"
+#ifdef HAVE_MMAP
+#include <sys/mman.h>
+#endif
+
/* In some cases we can optimize cache operation when reopening files.
For instance, a flush is entirely unnecessary if the file is already
closed, so a flush would use CACHE_NO_OPEN. Similarly, a seek using
static bfd_boolean
close_one (void)
{
- register bfd *kill;
+ register bfd *to_kill;
if (bfd_last_cache == NULL)
- kill = NULL;
+ to_kill = NULL;
else
{
- for (kill = bfd_last_cache->lru_prev;
- ! kill->cacheable;
- kill = kill->lru_prev)
+ for (to_kill = bfd_last_cache->lru_prev;
+ ! to_kill->cacheable;
+ to_kill = to_kill->lru_prev)
{
- if (kill == bfd_last_cache)
+ if (to_kill == bfd_last_cache)
{
- kill = NULL;
+ to_kill = NULL;
break;
}
}
}
- if (kill == NULL)
+ if (to_kill == NULL)
{
/* There are no open cacheable BFD's. */
return TRUE;
}
- kill->where = real_ftell ((FILE *) kill->iostream);
+ to_kill->where = real_ftell ((FILE *) to_kill->iostream);
- return bfd_cache_delete (kill);
+ return bfd_cache_delete (to_kill);
}
/* Check to see if the required BFD is the same as the last one
static int
cache_bseek (struct bfd *abfd, file_ptr offset, int whence)
{
- FILE *f = bfd_cache_lookup (abfd, whence != SEEK_CUR ? CACHE_NO_SEEK : 0);
+ FILE *f = bfd_cache_lookup (abfd, whence != SEEK_CUR ? CACHE_NO_SEEK : CACHE_NORMAL);
if (f == NULL)
return -1;
return real_fseek (f, offset, whence);
if (nbytes == 0)
return 0;
- f = bfd_cache_lookup (abfd, 0);
+ f = bfd_cache_lookup (abfd, CACHE_NORMAL);
if (f == NULL)
return 0;
cache_bwrite (struct bfd *abfd, const void *where, file_ptr nbytes)
{
file_ptr nwrite;
- FILE *f = bfd_cache_lookup (abfd, 0);
+ FILE *f = bfd_cache_lookup (abfd, CACHE_NORMAL);
if (f == NULL)
return 0;
return sts;
}
+static void *
+cache_bmmap (struct 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)
+{
+ void *ret = (void *) -1;
+
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ abort ();
+#ifdef HAVE_MMAP
+ else
+ {
+ FILE *f = bfd_cache_lookup (abfd, CACHE_NO_SEEK_ERROR);
+ if (f == NULL)
+ return ret;
+
+ ret = mmap (addr, len, prot, flags, fileno (f), offset);
+ if (ret == (void *) -1)
+ bfd_set_error (bfd_error_system_call);
+ }
+#endif
+
+ return ret;
+}
+
static const struct bfd_iovec cache_iovec =
{
&cache_bread, &cache_bwrite, &cache_btell, &cache_bseek,
- &cache_bclose, &cache_bflush, &cache_bstat
+ &cache_bclose, &cache_bflush, &cache_bstat, &cache_bmmap
};
/*