1 | /* |
2 | * Copyright (c) 2017 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_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. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | #ifndef _LIBKERN_COPYIO_H_ |
29 | #define _LIBKERN_COPYIO_H_ |
30 | |
31 | #include <kern/debug.h> |
32 | |
33 | __BEGIN_DECLS |
34 | |
35 | int copyin(const user_addr_t uaddr, void *kaddr, size_t len) OS_WARN_RESULT; |
36 | int copyout(const void *kaddr, user_addr_t udaddr, size_t len); |
37 | |
38 | #if defined (_FORTIFY_SOURCE) && _FORTIFY_SOURCE == 0 |
39 | /* FORTIFY_SOURCE disabled */ |
40 | |
41 | #ifdef XNU_KERNEL_PRIVATE |
42 | /* copyio wrappers that return mach error code */ |
43 | #define mach_copyin(uaddr, kaddr, len) (copyin(uaddr, kaddr, len) ? KERN_MEMORY_ERROR : KERN_SUCCESS) |
44 | #define mach_copyout(kaddr, uaddr, len) (copyout(kaddr, uaddr, len) ? KERN_MEMORY_ERROR : KERN_SUCCESS) |
45 | #endif /* XNU_KERNEL_PRIVATE */ |
46 | |
47 | #else |
48 | OS_ALWAYS_INLINE OS_WARN_RESULT static inline int |
49 | __copyin_chk(const user_addr_t uaddr, void *kaddr, size_t len, size_t chk_size) |
50 | { |
51 | if (chk_size < len) { |
52 | panic("__copyin_chk object size check failed: uaddr %p, kaddr %p, (%zu < %zu)" , (void*)uaddr, kaddr, len, chk_size); |
53 | } |
54 | return copyin(uaddr, kaddr, len); |
55 | } |
56 | |
57 | OS_ALWAYS_INLINE static inline int |
58 | __copyout_chk(const void *kaddr, user_addr_t uaddr, size_t len, size_t chk_size) |
59 | { |
60 | if (chk_size < len) { |
61 | panic("__copyout_chk object size check failed: uaddr %p, kaddr %p, (%zu < %zu)" , (void*)uaddr, kaddr, len, chk_size); |
62 | } |
63 | return copyout(kaddr, udaddr: uaddr, len); |
64 | } |
65 | #define copyin(uaddr, kaddr, len) __copyin_chk(uaddr, kaddr, len, __builtin_object_size(kaddr, 0)) |
66 | #define copyout(kaddr, uaddr, len) __copyout_chk(kaddr, uaddr, len, __builtin_object_size(kaddr, 0)) |
67 | |
68 | #ifdef XNU_KERNEL_PRIVATE |
69 | /* copyio wrappers that return mach error code */ |
70 | #define mach_copyin(uaddr, kaddr, len) (__copyin_chk(uaddr, kaddr, len, __builtin_object_size(kaddr, 0)) ? KERN_MEMORY_ERROR : KERN_SUCCESS) |
71 | #define mach_copyout(kaddr, uaddr, len) (__copyout_chk(kaddr, uaddr, len, __builtin_object_size(kaddr, 0)) ? KERN_MEMORY_ERROR : KERN_SUCCESS) |
72 | #endif /* XNU_KERNEL_PRIVATE */ |
73 | |
74 | #endif |
75 | __END_DECLS |
76 | #endif /* _LIBKERN_COPYIO_H_ */ |
77 | |