2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
10 #define VERIFY_WRITE 1
13 * The fs value determines whether argument validity checking should be
14 * performed or not. If get_fs() == USER_DS, checking is performed, with
15 * get_fs() == KERNEL_DS, checking is bypassed.
17 * For historical reasons, these macros are grossly misnamed.
20 #define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
22 #define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
23 #define USER_DS MAKE_MM_SEG(TASK_SIZE)
25 #define get_ds() (KERNEL_DS)
26 #define get_fs() (current_thread_info()->addr_limit)
27 #define set_fs(x) (current_thread_info()->addr_limit = (x))
29 #define segment_eq(a, b) ((a).seg == (b).seg)
31 #include "um_uaccess.h"
33 #define __copy_from_user(to, from, n) copy_from_user(to, from, n)
35 #define __copy_to_user(to, from, n) copy_to_user(to, from, n)
37 #define __copy_to_user_inatomic __copy_to_user
38 #define __copy_from_user_inatomic __copy_from_user
40 #define __get_user(x, ptr) \
42 const __typeof__(ptr) __private_ptr = ptr; \
43 __typeof__(*(__private_ptr)) __private_val; \
44 int __private_ret = -EFAULT; \
46 if (__copy_from_user(&__private_val, (__private_ptr), \
47 sizeof(*(__private_ptr))) == 0) {\
48 (x) = (__typeof__(*(__private_ptr))) __private_val; \
54 #define get_user(x, ptr) \
56 const __typeof__((*ptr)) *private_ptr = (ptr); \
57 (access_ok(VERIFY_READ, private_ptr, sizeof(*private_ptr)) ? \
58 __get_user(x, private_ptr) : ((x) = 0, -EFAULT)); \
61 #define __put_user(x, ptr) \
63 __typeof__(ptr) __private_ptr = ptr; \
64 __typeof__(*(__private_ptr)) __private_val; \
65 int __private_ret = -EFAULT; \
66 __private_val = (__typeof__(*(__private_ptr))) (x); \
67 if (__copy_to_user((__private_ptr), &__private_val, \
68 sizeof(*(__private_ptr))) == 0) { \
74 #define put_user(x, ptr) \
76 __typeof__(*(ptr)) *private_ptr = (ptr); \
77 (access_ok(VERIFY_WRITE, private_ptr, sizeof(*private_ptr)) ? \
78 __put_user(x, private_ptr) : -EFAULT); \
81 #define strlen_user(str) strnlen_user(str, ~0UL >> 1)
83 struct exception_table_entry
92 * Overrides for Emacs so that we follow Linus's tabbing style.
93 * Emacs will notice this stuff at the end of the file and automatically
94 * adjust the settings for this buffer only. This must remain at the end
96 * ---------------------------------------------------------------------------
98 * c-file-style: "linux"