mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 17:40:06 +00:00
182d6096fe
The only target that defines this is m68k, so move the existing fallback define up to avoid warnings on other systems.
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/* Copyright (C) 1999-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Jakub Jelinek <jakub@redhat.com>, 1999.
|
|
|
|
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 <unistd.h>
|
|
#include <sys/mman.h>
|
|
#include <string.h>
|
|
|
|
#include <sysdep.h>
|
|
#include <sys/syscall.h>
|
|
|
|
/* This is always 12, even on architectures where PAGE_SHIFT != 12. */
|
|
#ifndef MMAP2_PAGE_SHIFT
|
|
# define MMAP2_PAGE_SHIFT 12
|
|
#endif
|
|
#if MMAP2_PAGE_SHIFT == -1
|
|
static int page_shift;
|
|
#else
|
|
#define page_shift MMAP2_PAGE_SHIFT
|
|
#endif
|
|
|
|
|
|
void *
|
|
__mmap64 (void *addr, size_t len, int prot, int flags, int fd, off64_t offset)
|
|
{
|
|
#if MMAP2_PAGE_SHIFT == -1
|
|
if (page_shift == 0)
|
|
{
|
|
int page_size = __getpagesize ();
|
|
page_shift = __ffs (page_size) - 1;
|
|
}
|
|
#endif
|
|
if (offset & ((1 << page_shift) - 1))
|
|
{
|
|
__set_errno (EINVAL);
|
|
return MAP_FAILED;
|
|
}
|
|
void *result;
|
|
result = (void *)
|
|
INLINE_SYSCALL (mmap2, 6, addr,
|
|
len, prot, flags, fd,
|
|
(off_t) (offset >> page_shift));
|
|
return result;
|
|
}
|
|
weak_alias (__mmap64, mmap64)
|