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
34 void *__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 */
42 void *
mmap(void * addr,size_t len,int prot,int flags,int fildes,off_t off)43 mmap(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 * [ This is enforced by the kernel with MAP_UNIX03 ]
50 * o flags does not contain either MAP_PRIVATE or MAP_SHARED
51 * o len is zero
52 *
53 * Now enforced by the kernel when the MAP_UNIX03 flag is provided.
54 */
55 extern void cerror_nocancel(int);
56 if ((((flags & MAP_PRIVATE) != MAP_PRIVATE) &&
57 ((flags & MAP_SHARED) != MAP_SHARED)) ||
58 (len == 0)) {
59 cerror_nocancel(EINVAL);
60 return MAP_FAILED;
61 }
62
63 void *ptr = __mmap(addr, len, prot, flags | MAP_UNIX03, fildes, off);
64
65 if (__syscall_logger) {
66 int stackLoggingFlags = stack_logging_type_vm_allocate;
67 if (flags & MAP_ANON) {
68 stackLoggingFlags |= (fildes & VM_FLAGS_ALIAS_MASK);
69 } else {
70 stackLoggingFlags |= stack_logging_type_mapped_file_or_shared_mem;
71 }
72 __syscall_logger(stackLoggingFlags, (uintptr_t)mach_task_self(), (uintptr_t)len, 0, (uintptr_t)ptr, 0);
73 }
74
75 return ptr;
76 }
77
78 #endif /* __DARWIN_UNIX03 */
79