mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 21:40:12 +00:00
49 lines
1.9 KiB
C
49 lines
1.9 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 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 <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)
|