1/*
2 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24#include <sys/cdefs.h>
25
26#if __DARWIN_UNIX03
27
28#include <sys/mman.h>
29#include <mach/vm_param.h>
30#include <errno.h>
31#include <mach/mach_init.h>
32#include "stack_logging_internal.h"
33
34void *__mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off);
35
36/*
37 * mmap stub, with preemptory failures due to extra parameter checking
38 * mandated for conformance.
39 *
40 * This is for UNIX03 only.
41 */
42void *
43mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off)
44{
45	/*
46	 * Preemptory failures:
47	 *
48	 * o	off is not a multiple of the page size
49	 * o	flags does not contain either MAP_PRIVATE or MAP_SHARED
50	 * o	len is zero
51	 */
52	extern void cerror_nocancel(int);
53	if ((off & PAGE_MASK) ||
54	    (((flags & MAP_PRIVATE) != MAP_PRIVATE) &&
55	     ((flags & MAP_SHARED) != MAP_SHARED)) ||
56	    (len == 0)) {
57		cerror_nocancel(EINVAL);
58		return(MAP_FAILED);
59	}
60
61	void *ptr = __mmap(addr, len, prot, flags, fildes, off);
62
63	if (__syscall_logger) {
64		int stackLoggingFlags = stack_logging_type_vm_allocate;
65		if (flags & MAP_ANON) {
66			stackLoggingFlags |= (fildes & VM_FLAGS_ALIAS_MASK);
67		} else {
68			stackLoggingFlags |= stack_logging_type_mapped_file_or_shared_mem;
69		}
70		__syscall_logger(stackLoggingFlags, (uintptr_t)mach_task_self(), (uintptr_t)len, 0, (uintptr_t)ptr, 0);
71	}
72
73	return ptr;
74}
75
76#endif /* __DARWIN_UNIX03 */
77