Author: kib
Date: Wed Sep 23 13:49:41 2009
New Revision: 197431
URL: http://svn.freebsd.org/changeset/base/197431
Log:
MFC r197348:
For a.out and pre-8 ELF binaries, allow the mmap of zero length.
Approved by: re (kensmith)
Modified:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
stable/8/sys/dev/xen/xenpci/ (props changed)
stable/8/sys/vm/vm_mmap.c
Modified: stable/8/sys/vm/vm_mmap.c
==============================================================================
--- stable/8/sys/vm/vm_mmap.c Wed Sep 23 12:33:32 2009 (r197430)
+++ stable/8/sys/vm/vm_mmap.c Wed Sep 23 13:49:41 2009 (r197431)
@@ -64,6 +64,7 @@ __FBSDID("$FreeBSD$");
#include <sys/mount.h>
#include <sys/conf.h>
#include <sys/stat.h>
+#include <sys/sysent.h>
#include <sys/vmmeter.h>
#include <sys/sysctl.h>
@@ -229,7 +230,8 @@ mmap(td, uap)
fp = NULL;
/* make sure mapping fits into numeric range etc */
- if (uap->len == 0 ||
+ if ((uap->len == 0 && !SV_CURPROC_FLAG(SV_AOUT) &&
+ curproc->p_osrel >= 800104) ||
((flags & MAP_ANON) && uap->fd != -1))
return (EINVAL);
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