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)
13
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18
19
20
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)))
27
28#define user_addr_max() (current_thread_info()->addr_limit.seg)
29
30
31
32
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38
39
40
41
42#define put_user(x,ptr) __put_user_check((x), (ptr), sizeof(*(ptr)))
43#define get_user(x,ptr) __get_user_check((x), (ptr), sizeof(*(ptr)))
44
45
46
47
48
49
50#define __put_user(x,ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr)))
51#define __get_user(x,ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
52
53struct __large_struct { unsigned long buf[100]; };
54#define __m(x) (*(struct __large_struct __user *)(x))
55
56#define __get_user_nocheck(x,ptr,size) \
57({ \
58 long __gu_err; \
59 unsigned long __gu_val; \
60 const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
61 __chk_user_ptr(ptr); \
62 __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
63 (x) = (__force __typeof__(*(ptr)))__gu_val; \
64 __gu_err; \
65})
66
67#define __get_user_check(x,ptr,size) \
68({ \
69 long __gu_err = -EFAULT; \
70 unsigned long __gu_val = 0; \
71 const __typeof__(*(ptr)) *__gu_addr = (ptr); \
72 if (likely(access_ok(VERIFY_READ, __gu_addr, (size)))) \
73 __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
74 (x) = (__force __typeof__(*(ptr)))__gu_val; \
75 __gu_err; \
76})
77
78#define __put_user_nocheck(x,ptr,size) \
79({ \
80 long __pu_err; \
81 __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
82 __typeof__(*(ptr)) __pu_val = x; \
83 __chk_user_ptr(ptr); \
84 __put_user_size(__pu_val, __pu_addr, (size), __pu_err); \
85 __pu_err; \
86})
87
88#define __put_user_check(x,ptr,size) \
89({ \
90 long __pu_err = -EFAULT; \
91 __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
92 __typeof__(*(ptr)) __pu_val = x; \
93 if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \
94 __put_user_size(__pu_val, __pu_addr, (size), \
95 __pu_err); \
96 __pu_err; \
97})
98
99#ifdef CONFIG_SUPERH32
100# include <asm/uaccess_32.h>
101#else
102# include <asm/uaccess_64.h>
103#endif
104
105extern long strncpy_from_user(char *dest, const char __user *src, long count);
106
107extern __must_check long strlen_user(const char __user *str);
108extern __must_check long strnlen_user(const char __user *str, long n);
109
110
111
112__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n);
113
114static __always_inline unsigned long
115__copy_from_user(void *to, const void __user *from, unsigned long n)
116{
117 return __copy_user(to, (__force void *)from, n);
118}
119
120static __always_inline unsigned long __must_check
121__copy_to_user(void __user *to, const void *from, unsigned long n)
122{
123 return __copy_user((__force void *)to, from, n);
124}
125
126#define __copy_to_user_inatomic __copy_to_user
127#define __copy_from_user_inatomic __copy_from_user
128
129
130
131
132
133__kernel_size_t __clear_user(void *addr, __kernel_size_t size);
134
135#define clear_user(addr,n) \
136({ \
137 void __user * __cl_addr = (addr); \
138 unsigned long __cl_size = (n); \
139 \
140 if (__cl_size && access_ok(VERIFY_WRITE, \
141 ((unsigned long)(__cl_addr)), __cl_size)) \
142 __cl_size = __clear_user(__cl_addr, __cl_size); \
143 \
144 __cl_size; \
145})
146
147static inline unsigned long
148copy_from_user(void *to, const void __user *from, unsigned long n)
149{
150 unsigned long __copy_from = (unsigned long) from;
151 __kernel_size_t __copy_size = (__kernel_size_t) n;
152
153 if (__copy_size && __access_ok(__copy_from, __copy_size))
154 return __copy_user(to, from, __copy_size);
155
156 return __copy_size;
157}
158
159static inline unsigned long
160copy_to_user(void __user *to, const void *from, unsigned long n)
161{
162 unsigned long __copy_to = (unsigned long) to;
163 __kernel_size_t __copy_size = (__kernel_size_t) n;
164
165 if (__copy_size && __access_ok(__copy_to, __copy_size))
166 return __copy_user(to, from, __copy_size);
167
168 return __copy_size;
169}
170
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180
181
182
183struct exception_table_entry {
184 unsigned long insn, fixup;
185};
186
187#if defined(CONFIG_SUPERH64) && defined(CONFIG_MMU)
188#define ARCH_HAS_SEARCH_EXTABLE
189#endif
190
191int fixup_exception(struct pt_regs *regs);
192
193unsigned long search_exception_table(unsigned long addr);
194const struct exception_table_entry *search_exception_tables(unsigned long addr);
195
196extern void *set_exception_table_vec(unsigned int vec, void *handler);
197
198static inline void *set_exception_table_evt(unsigned int evt, void *handler)
199{
200 return set_exception_table_vec(evt >> 5, handler);
201}
202
203struct mem_access {
204 unsigned long (*from)(void *dst, const void __user *src, unsigned long cnt);
205 unsigned long (*to)(void __user *dst, const void *src, unsigned long cnt);
206};
207
208int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
209 struct mem_access *ma, int, unsigned long address);
210
211#endif
212