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1 | #ifndef __ASM_SH_UACCESS_H |
2 | #define __ASM_SH_UACCESS_H | |
3 | ||
42fd3b14 | 4 | #include <asm/segment.h> |
bcd541d9 | 5 | #include <asm/extable.h> |
42fd3b14 | 6 | |
42fd3b14 PM |
7 | #define __addr_ok(addr) \ |
8 | ((unsigned long __force)(addr) < current_thread_info()->addr_limit.seg) | |
9 | ||
10 | /* | |
11 | * __access_ok: Check if address with size is OK or not. | |
12 | * | |
13 | * Uhhuh, this needs 33-bit arithmetic. We have a carry.. | |
14 | * | |
15 | * sum := addr + size; carry? --> flag = true; | |
16 | * if (sum >= addr_limit) flag = true; | |
17 | */ | |
18 | #define __access_ok(addr, size) \ | |
19 | (__addr_ok((addr) + (size))) | |
20 | #define access_ok(type, addr, size) \ | |
21 | (__chk_user_ptr(addr), \ | |
22 | __access_ok((unsigned long __force)(addr), (size))) | |
23 | ||
0e100e11 PM |
24 | #define user_addr_max() (current_thread_info()->addr_limit.seg) |
25 | ||
42fd3b14 PM |
26 | /* |
27 | * Uh, these should become the main single-value transfer routines ... | |
28 | * They automatically use the right size if we just have the right | |
29 | * pointer type ... | |
30 | * | |
31 | * As SuperH uses the same address space for kernel and user data, we | |
32 | * can just do these as direct assignments. | |
33 | * | |
34 | * Careful to not | |
35 | * (a) re-use the arguments for side effects (sizeof is ok) | |
36 | * (b) require any knowledge of processes at this stage | |
37 | */ | |
38 | #define put_user(x,ptr) __put_user_check((x), (ptr), sizeof(*(ptr))) | |
39 | #define get_user(x,ptr) __get_user_check((x), (ptr), sizeof(*(ptr))) | |
40 | ||
41 | /* | |
42 | * The "__xxx" versions do not do address space checking, useful when | |
43 | * doing multiple accesses to the same area (the user has to do the | |
44 | * checks by hand with "access_ok()") | |
45 | */ | |
46 | #define __put_user(x,ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr))) | |
47 | #define __get_user(x,ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr))) | |
48 | ||
49 | struct __large_struct { unsigned long buf[100]; }; | |
50 | #define __m(x) (*(struct __large_struct __user *)(x)) | |
51 | ||
52 | #define __get_user_nocheck(x,ptr,size) \ | |
53 | ({ \ | |
54 | long __gu_err; \ | |
55 | unsigned long __gu_val; \ | |
56 | const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ | |
57 | __chk_user_ptr(ptr); \ | |
58 | __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ | |
cad1c0df | 59 | (x) = (__force __typeof__(*(ptr)))__gu_val; \ |
42fd3b14 PM |
60 | __gu_err; \ |
61 | }) | |
62 | ||
63 | #define __get_user_check(x,ptr,size) \ | |
64 | ({ \ | |
65 | long __gu_err = -EFAULT; \ | |
66 | unsigned long __gu_val = 0; \ | |
67 | const __typeof__(*(ptr)) *__gu_addr = (ptr); \ | |
68 | if (likely(access_ok(VERIFY_READ, __gu_addr, (size)))) \ | |
69 | __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ | |
cad1c0df | 70 | (x) = (__force __typeof__(*(ptr)))__gu_val; \ |
42fd3b14 PM |
71 | __gu_err; \ |
72 | }) | |
73 | ||
74 | #define __put_user_nocheck(x,ptr,size) \ | |
75 | ({ \ | |
76 | long __pu_err; \ | |
77 | __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ | |
6de9c648 | 78 | __typeof__(*(ptr)) __pu_val = x; \ |
42fd3b14 | 79 | __chk_user_ptr(ptr); \ |
6de9c648 | 80 | __put_user_size(__pu_val, __pu_addr, (size), __pu_err); \ |
42fd3b14 PM |
81 | __pu_err; \ |
82 | }) | |
83 | ||
84 | #define __put_user_check(x,ptr,size) \ | |
85 | ({ \ | |
86 | long __pu_err = -EFAULT; \ | |
87 | __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ | |
6de9c648 | 88 | __typeof__(*(ptr)) __pu_val = x; \ |
42fd3b14 | 89 | if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \ |
6de9c648 | 90 | __put_user_size(__pu_val, __pu_addr, (size), \ |
42fd3b14 PM |
91 | __pu_err); \ |
92 | __pu_err; \ | |
93 | }) | |
94 | ||
9b01bd9e | 95 | #ifdef CONFIG_SUPERH32 |
a1ce3928 | 96 | # include <asm/uaccess_32.h> |
1da177e4 | 97 | #else |
a1ce3928 | 98 | # include <asm/uaccess_64.h> |
1da177e4 | 99 | #endif |
1e6760c5 | 100 | |
0e100e11 PM |
101 | extern long strncpy_from_user(char *dest, const char __user *src, long count); |
102 | ||
cba8df4b PM |
103 | extern __must_check long strlen_user(const char __user *str); |
104 | extern __must_check long strnlen_user(const char __user *str, long n); | |
105 | ||
42fd3b14 PM |
106 | /* Generic arbitrary sized copy. */ |
107 | /* Return the number of bytes NOT copied */ | |
108 | __kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n); | |
109 | ||
110 | static __always_inline unsigned long | |
f98f48ee | 111 | raw_copy_from_user(void *to, const void __user *from, unsigned long n) |
42fd3b14 PM |
112 | { |
113 | return __copy_user(to, (__force void *)from, n); | |
114 | } | |
115 | ||
116 | static __always_inline unsigned long __must_check | |
f98f48ee | 117 | raw_copy_to_user(void __user *to, const void *from, unsigned long n) |
42fd3b14 PM |
118 | { |
119 | return __copy_user((__force void *)to, from, n); | |
120 | } | |
f98f48ee AV |
121 | #define INLINE_COPY_FROM_USER |
122 | #define INLINE_COPY_TO_USER | |
42fd3b14 PM |
123 | |
124 | /* | |
125 | * Clear the area and return remaining number of bytes | |
126 | * (on failure. Usually it's 0.) | |
127 | */ | |
128 | __kernel_size_t __clear_user(void *addr, __kernel_size_t size); | |
129 | ||
130 | #define clear_user(addr,n) \ | |
131 | ({ \ | |
132 | void __user * __cl_addr = (addr); \ | |
133 | unsigned long __cl_size = (n); \ | |
134 | \ | |
135 | if (__cl_size && access_ok(VERIFY_WRITE, \ | |
136 | ((unsigned long)(__cl_addr)), __cl_size)) \ | |
137 | __cl_size = __clear_user(__cl_addr, __cl_size); \ | |
138 | \ | |
139 | __cl_size; \ | |
140 | }) | |
141 | ||
e839ca52 DH |
142 | extern void *set_exception_table_vec(unsigned int vec, void *handler); |
143 | ||
144 | static inline void *set_exception_table_evt(unsigned int evt, void *handler) | |
145 | { | |
146 | return set_exception_table_vec(evt >> 5, handler); | |
147 | } | |
148 | ||
149 | struct mem_access { | |
150 | unsigned long (*from)(void *dst, const void __user *src, unsigned long cnt); | |
151 | unsigned long (*to)(void __user *dst, const void *src, unsigned long cnt); | |
152 | }; | |
153 | ||
154 | int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs, | |
155 | struct mem_access *ma, int, unsigned long address); | |
42fd3b14 | 156 | |
1e6760c5 | 157 | #endif /* __ASM_SH_UACCESS_H */ |