1#ifndef __ASM_SH_UACCESS_H
2#define __ASM_SH_UACCESS_H
3
4#include <linux/errno.h>
5#include <linux/sched.h>
6#include <asm/segment.h>
7
8#define VERIFY_READ 0
9#define VERIFY_WRITE 1
10
11#define __addr_ok(addr) \
12 ((unsigned long __force)(addr) < current_thread_info()->addr_limit.seg)
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21
22#define __access_ok(addr, size) \
23 (__addr_ok((addr) + (size)))
24#define access_ok(type, addr, size) \
25 (__chk_user_ptr(addr), \
26 __access_ok((unsigned long __force)(addr), (size)))
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39
40#define put_user(x,ptr) __put_user_check((x), (ptr), sizeof(*(ptr)))
41#define get_user(x,ptr) __get_user_check((x), (ptr), sizeof(*(ptr)))
42
43
44
45
46
47
48#define __put_user(x,ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr)))
49#define __get_user(x,ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
50
51struct __large_struct { unsigned long buf[100]; };
52#define __m(x) (*(struct __large_struct __user *)(x))
53
54#define __get_user_nocheck(x,ptr,size) \
55({ \
56 long __gu_err; \
57 unsigned long __gu_val; \
58 const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
59 __chk_user_ptr(ptr); \
60 __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
61 (x) = (__typeof__(*(ptr)))__gu_val; \
62 __gu_err; \
63})
64
65#define __get_user_check(x,ptr,size) \
66({ \
67 long __gu_err = -EFAULT; \
68 unsigned long __gu_val = 0; \
69 const __typeof__(*(ptr)) *__gu_addr = (ptr); \
70 if (likely(access_ok(VERIFY_READ, __gu_addr, (size)))) \
71 __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
72 (x) = (__typeof__(*(ptr)))__gu_val; \
73 __gu_err; \
74})
75
76#define __put_user_nocheck(x,ptr,size) \
77({ \
78 long __pu_err; \
79 __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
80 __typeof__(*(ptr)) __pu_val = x; \
81 __chk_user_ptr(ptr); \
82 __put_user_size(__pu_val, __pu_addr, (size), __pu_err); \
83 __pu_err; \
84})
85
86#define __put_user_check(x,ptr,size) \
87({ \
88 long __pu_err = -EFAULT; \
89 __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
90 __typeof__(*(ptr)) __pu_val = x; \
91 if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \
92 __put_user_size(__pu_val, __pu_addr, (size), \
93 __pu_err); \
94 __pu_err; \
95})
96
97#ifdef CONFIG_SUPERH32
98# include "uaccess_32.h"
99#else
100# include "uaccess_64.h"
101#endif
102
103
104
105__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n);
106
107static __always_inline unsigned long
108__copy_from_user(void *to, const void __user *from, unsigned long n)
109{
110 return __copy_user(to, (__force void *)from, n);
111}
112
113static __always_inline unsigned long __must_check
114__copy_to_user(void __user *to, const void *from, unsigned long n)
115{
116 return __copy_user((__force void *)to, from, n);
117}
118
119#define __copy_to_user_inatomic __copy_to_user
120#define __copy_from_user_inatomic __copy_from_user
121
122
123
124
125
126__kernel_size_t __clear_user(void *addr, __kernel_size_t size);
127
128#define clear_user(addr,n) \
129({ \
130 void __user * __cl_addr = (addr); \
131 unsigned long __cl_size = (n); \
132 \
133 if (__cl_size && access_ok(VERIFY_WRITE, \
134 ((unsigned long)(__cl_addr)), __cl_size)) \
135 __cl_size = __clear_user(__cl_addr, __cl_size); \
136 \
137 __cl_size; \
138})
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157
158#define strncpy_from_user(dest,src,count) \
159({ \
160 unsigned long __sfu_src = (unsigned long)(src); \
161 int __sfu_count = (int)(count); \
162 long __sfu_res = -EFAULT; \
163 \
164 if (__access_ok(__sfu_src, __sfu_count)) \
165 __sfu_res = __strncpy_from_user((unsigned long)(dest), \
166 __sfu_src, __sfu_count); \
167 \
168 __sfu_res; \
169})
170
171static inline unsigned long
172copy_from_user(void *to, const void __user *from, unsigned long n)
173{
174 unsigned long __copy_from = (unsigned long) from;
175 __kernel_size_t __copy_size = (__kernel_size_t) n;
176
177 if (__copy_size && __access_ok(__copy_from, __copy_size))
178 return __copy_user(to, from, __copy_size);
179
180 return __copy_size;
181}
182
183static inline unsigned long
184copy_to_user(void __user *to, const void *from, unsigned long n)
185{
186 unsigned long __copy_to = (unsigned long) to;
187 __kernel_size_t __copy_size = (__kernel_size_t) n;
188
189 if (__copy_size && __access_ok(__copy_to, __copy_size))
190 return __copy_user(to, from, __copy_size);
191
192 return __copy_size;
193}
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207
208static inline long strnlen_user(const char __user *s, long n)
209{
210 if (!__addr_ok(s))
211 return 0;
212 else
213 return __strnlen_user(s, n);
214}
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229
230#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
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243
244struct exception_table_entry {
245 unsigned long insn, fixup;
246};
247
248#if defined(CONFIG_SUPERH64) && defined(CONFIG_MMU)
249#define ARCH_HAS_SEARCH_EXTABLE
250#endif
251
252int fixup_exception(struct pt_regs *regs);
253
254unsigned long search_exception_table(unsigned long addr);
255const struct exception_table_entry *search_exception_tables(unsigned long addr);
256
257
258#endif
259