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/*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/* Massivly hacked up for uClibc by Erik Andersen */
#include <features.h>
#include <errno.h>
#include <unistd.h>
#include <sys/mman.h>
#ifdef __UCLIBC_HAS_LFS__
libc_hidden_proto(mmap)
#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS != 64
# undef _FILE_OFFSET_BITS
# define _FILE_OFFSET_BITS 64
#endif
#ifndef __USE_LARGEFILE64
# define __USE_LARGEFILE64 1
#endif
/* We absolutely do _NOT_ want interfaces silently
* renamed under us or very bad things will happen...
*/
#ifdef __USE_FILE_OFFSET64
# undef __USE_FILE_OFFSET64
#endif
# if !defined __NR_mmap2 || !defined _syscall6
/*
* This version is a stub that just chops off everything at the mmap 32 bit
* mmap() address space... You will probably need to add in an arch specific
* implementation to override this as there is not a generic way for me to
* implement this particular syscall if your arch lacks _syscall6...
*
*/
__ptr_t mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t offset)
{
if (offset != (off_t) offset ||
(offset + len) != (off_t) (offset + len)) {
__set_errno(EINVAL);
return MAP_FAILED;
}
return mmap(addr, len, prot, flags, fd, (off_t) offset);
}
# else
# 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 mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t offset)
{
if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) {
__set_errno(EINVAL);
return MAP_FAILED;
}
return __syscall_mmap2(addr, len, prot, flags, fd, (off_t) (offset >> MMAP2_PAGE_SHIFT));
}
# endif
#endif /* __UCLIBC_HAS_LFS__ */
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