/*
* Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#ifndef NO_SYSCALL_LEGACY
#define _NONSTD_SOURCE
#include <sys/cdefs.h>
#include "_errno.h"
#include <sys/types.h>
#include <sys/mman.h>
#include <mach/vm_param.h>
/*
* Stub function to account for the differences in standard compliance
* while maintaining binary backward compatibility.
*
* This is only the legacy behavior.
*/
extern int __mprotect(void *, size_t, int);
int
mprotect(void *addr, size_t len, int prot)
{
void *aligned_addr;
size_t offset;
int rv;
/*
* Page-align "addr" since the system now requires it
* for standards compliance.
* Update "len" to reflect the alignment.
*/
offset = ((uintptr_t) addr) & PAGE_MASK;
aligned_addr = (void *) (((uintptr_t) addr) & ~PAGE_MASK);
len += offset;
rv = __mprotect(aligned_addr, len, prot);
if (rv == -1 && errno == ENOMEM) {
/*
* Standards now require that we return ENOMEM if there was
* a hole in the address range. Panther and earlier used
* to return an EINVAL error, so honor backwards compatibility.
*/
errno = EINVAL;
}
return rv;
}
#endif /* NO_SYSCALL_LEGACY */