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/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
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. */
#include <sys/types.h>
#include <sys/mman.h>
#include <unistd.h>
#include <errno.h>
#include <sysdep.h>
extern void *__syscall_mmap (void *__addr, size_t __len, int __prot,
int __flags, int __fd, __off_t __offset) __THROW;
libc_hidden_proto (__syscall_mmap)
void *
__mmap (void *addr, size_t len, int prot, int flags, int fd, __off_t offset)
{
/* Validity checks not done by the kernel. */
if (offset != 0)
{
int pagesize = __getpagesize ();
if ((__builtin_expect (pagesize & (pagesize - 1), 0)
? offset % pagesize
: offset & (pagesize - 1)))
{
__set_errno (EINVAL);
return (void *) (-1);
}
}
/* for ANON mapping we must pass -1 in place of fd */
if (flags & MAP_ANON)
fd = -1;
return INLINE_SYSCALL (mmap, 6, addr, len, prot, flags, fd, offset);
}
weak_alias (__mmap, mmap)
/* 'mmap64' is the same as 'mmap', because __off64_t == __off_t. */
strong_alias (__mmap, __mmap64)
weak_alias (__mmap64, mmap64)
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