1 | /* $NetBSD: uaccess.h,v 1.2 2014/03/18 18:20:42 riastradh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2013 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Taylor R. Campbell. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _ASM_UACCESS_H_ |
33 | #define _ASM_UACCESS_H_ |
34 | |
35 | #include <sys/types.h> |
36 | #include <sys/systm.h> |
37 | |
38 | /* XXX This is a cop-out. */ |
39 | #define VERIFY_READ 0 |
40 | #define VERIFY_WRITE 1 |
41 | static inline bool |
42 | access_ok(int verify_op __unused, const void *uaddr __unused, |
43 | size_t nbytes __unused) |
44 | { |
45 | return true; |
46 | } |
47 | |
48 | #define __copy_from_user copy_from_user |
49 | #define __copy_to_user copy_to_user |
50 | |
51 | static inline int |
52 | copy_from_user(void *kernel_addr, const void *user_addr, size_t len) |
53 | { |
54 | /* XXX errno NetBSD->Linux */ |
55 | return -copyin(user_addr, kernel_addr, len); |
56 | } |
57 | |
58 | static inline int |
59 | copy_to_user(void *user_addr, const void *kernel_addr, size_t len) |
60 | { |
61 | /* XXX errno NetBSD->Linux */ |
62 | return -copyout(kernel_addr, user_addr, len); |
63 | } |
64 | |
65 | #define get_user(KERNEL_LOC, USER_ADDR) \ |
66 | copy_from_user(&(KERNEL_LOC), (USER_ADDR), sizeof(KERNEL_LOC)) |
67 | |
68 | #define put_user(KERNEL_LOC, USER_ADDR) \ |
69 | copy_to_user((USER_ADDR), &(KERNEL_LOC), sizeof(KERNEL_LOC)) |
70 | |
71 | #if 0 |
72 | /* |
73 | * XXX These `inatomic' versions are a cop out, but they should do for |
74 | * now -- they are used only in fast paths which can't fault but which |
75 | * can fall back to slower paths that arrange things so faulting is OK. |
76 | */ |
77 | |
78 | static inline int |
79 | __copy_from_user_inatomic(void *kernel_addr __unused, |
80 | const void *user_addr __unused, size_t len __unused) |
81 | { |
82 | return -EFAULT; |
83 | } |
84 | |
85 | static inline int |
86 | __copy_to_user_inatomic(void *user_addr __unused, |
87 | const void *kernel_addr __unused, size_t len __unused) |
88 | { |
89 | return -EFAULT; |
90 | } |
91 | #endif /* 0 */ |
92 | |
93 | static inline int |
94 | __copy_from_user_inatomic_nocache(void *kernel_addr __unused, |
95 | const void *user_addr __unused, size_t len __unused) |
96 | { |
97 | return -EFAULT; |
98 | } |
99 | |
100 | #endif /* _ASM_UACCESS_H_ */ |
101 | |