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* sysdeps/unix/sysv/linux/syscalls.list: Remove mmap64 alias for mmap.
	* sysdeps/unix/sysv/linux/mmap64.c: Test whether mapped area is in
	range of mmap.  If not fail.
	Patches by Daniel Jacobowitz <dan@debian.org>.
This commit is contained in:
Ulrich Drepper
1999-07-09 15:17:23 +00:00
parent 6a1db4ffb6
commit 3eb515a631
3 changed files with 52 additions and 4 deletions
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49
sysdeps/unix/sysv/linux/mmap64.c
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@ -1,3 +1,46 @@
/* At least for now mmap64 is the same as mmap on all platforms.
When/If the 32 bit platforms get a >32 bit VFS we'll have to
change it for these platforms. */
/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Daniel Jacobowitz <dan@debian.org>, 1999.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <sys/mman.h>
__ptr_t
__mmap64 (addr, len, prot, flags, fd, offset)
__ptr_t addr;
size_t len;
int prot;
int flags;
int fd;
off64_t offset;
{
if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len))
{
__set_errno (EINVAL);
return MAP_FAILED;
}
return __mmap (addr, len, prot, flags, fd, (off_t) offset);
}
weak_alias (__mmap64, mmap64)