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/* vi: set sw=4 ts=4: */
/*
* mmap() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <unistd.h>
#include <sys/mman.h>
#include <bits/uClibc_page.h>
#ifdef __NR_mmap
#ifdef __UCLIBC_MMAP_HAS_6_ARGS__
_syscall6(void *, mmap, void *, start, size_t, length,
int, prot, int, flags, int, fd, off_t, offset)
#else
# define __NR__mmap __NR_mmap
static __inline__ _syscall1(__ptr_t, _mmap, unsigned long *, buffer)
__ptr_t mmap(__ptr_t addr, size_t len, int prot,
int flags, int fd, __off_t offset)
{
unsigned long buffer[6];
buffer[0] = (unsigned long) addr;
buffer[1] = (unsigned long) len;
buffer[2] = (unsigned long) prot;
buffer[3] = (unsigned long) flags;
buffer[4] = (unsigned long) fd;
buffer[5] = (unsigned long) offset;
return (__ptr_t) _mmap(buffer);
}
#endif
libc_hidden_def(mmap)
#elif defined(__NR_mmap2)
#define __NR___syscall_mmap2 __NR_mmap2
static __inline__ _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr,
size_t, len, int, prot, int, flags, int, fd, off_t, offset)
/* Some architectures always use 12 as page shift for mmap2() eventhough the
* real PAGE_SHIFT != 12. Other architectures use the same value as
* PAGE_SHIFT...
*/
# ifndef MMAP2_PAGE_SHIFT
# define MMAP2_PAGE_SHIFT 12
# endif
__ptr_t mmap(__ptr_t addr, size_t len, int prot, int flags, int fd, __off_t offset)
{
if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) {
__set_errno(EINVAL);
return MAP_FAILED;
}
return __syscall_mmap2(addr, len, prot, flags, fd, offset >> MMAP2_PAGE_SHIFT);
}
libc_hidden_def(mmap)
#endif
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