| | 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 * |
| | 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 */ |
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