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/* Copyright (C) 1997, 1998, 1999, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Daniel Jacobowitz <dan@debian.org>, 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* Massivly hacked up for uClibc by Erik Andersen */
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/mman.h>
#if defined __UCLIBC_HAS_LFS__
#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(void *, __syscall_mmap2, void *, addr,
size_t len, int, prot, int, flags, int, fd, off_t, offset);
/* This is always 12, even on architectures where PAGE_SHIFT != 12. */
# ifndef MMAP2_PAGE_SHIFT
# define MMAP2_PAGE_SHIFT 12
# endif
void * __mmap64 (void *addr, size_t len, int prot, int flags, int fd, off64_t offset)
{
void *result;
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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