mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
/* Copyright (C) 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/types.h>
|
|
|
|
/* Map addresses starting near ADDR and extending for LEN bytes. From
|
|
OFFSET into the file FD describes according to PROT and FLAGS. If ADDR
|
|
is nonzero, it is the desired mapping address. If the MAP_FIXED bit is
|
|
set in FLAGS, the mapping will be at ADDR exactly (which must be
|
|
page-aligned); otherwise the system chooses a convenient nearby address.
|
|
The return value is the actual mapping address chosen or MAP_FAILED
|
|
for errors (in which case `errno' is set). A successful `mmap' call
|
|
deallocates any previous mapping for the affected region. */
|
|
|
|
__ptr_t
|
|
__mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd,
|
|
__off64_t offset)
|
|
{
|
|
off_t small_offset = (off_t) offset;
|
|
|
|
if (small_offset != offset)
|
|
{
|
|
/* We cannot do this since the offset is too large. */
|
|
__set_errno (EOVERFLOW);
|
|
return MAP_FAILED;
|
|
}
|
|
|
|
return __mmap (addr, len, prot, flags, fd, small_offset);
|
|
}
|
|
|
|
weak_alias (__mmap64, mmap64)
|