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/*
* Copyright (C) 2004-2007 Atmel Corporation
*
* This file is subject to the terms and conditions of the GNU Lesser General
* Public License. See the file "COPYING.LIB" in the main directory of this
* archive for more details.
*/
#include <errno.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/syscall.h>
libc_hidden_proto(mmap)
static _syscall6(__ptr_t, mmap2, __ptr_t, addr, size_t, len, int, prot,
int, flags, int, fd, __off_t, pgoff);
__ptr_t mmap(__ptr_t addr, size_t len, int prot, int flags, int fd, __off_t offset)
{
unsigned long page_size = sysconf(_SC_PAGESIZE);
unsigned long pgoff;
if (offset & (page_size - 1)) {
__set_errno(EINVAL);
return MAP_FAILED;
}
pgoff = (unsigned long)offset >> (31 - __builtin_clz(page_size));
return mmap2(addr, len, prot, flags, fd, pgoff);
}
libc_hidden_def(mmap)
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