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/* $Id: uaccess.h,v 1.1.1.1 2004-04-15 03:01:05 phoenix Exp $ */
#ifndef _ASM_UACCESS_H
#define _ASM_UACCESS_H
 
/*
 * User space memory access functions
 */
 
#ifdef __KERNEL__
#include <linux/sched.h>
#include <linux/string.h>
#include <asm/a.out.h>
#include <asm/asi.h>
#include <asm/system.h>
#include <asm/spitfire.h>
#endif
 
#ifndef __ASSEMBLY__
 
/*
 * Sparc64 is segmented, though more like the M68K than the I386.
 * We use the secondary ASI to address user memory, which references a
 * completely different VM map, thus there is zero chance of the user
 * doing something queer and tricking us into poking kernel memory.
 *
 * What is left here is basically what is needed for the other parts of
 * the kernel that expect to be able to manipulate, erum, "segments".
 * Or perhaps more properly, permissions.
 *
 * "For historical reasons, these macros are grossly misnamed." -Linus
 */
 
#define KERNEL_DS   ((mm_segment_t) { ASI_P })
#define USER_DS     ((mm_segment_t) { ASI_AIUS })       /* har har har */
 
#define VERIFY_READ     0
#define VERIFY_WRITE    1
 
#define get_fs() (current->thread.current_ds)
#define get_ds() (KERNEL_DS)
 
#define segment_eq(a,b)  ((a).seg == (b).seg)
 
#define set_fs(val)                                                             \
do {                                                                            \
        current->thread.current_ds = (val);                                     \
        __asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg));        \
} while(0)
 
#define __user_ok(addr,size) 1
#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
#define __access_ok(addr,size) 1
#define access_ok(type,addr,size) 1
 
extern inline int verify_area(int type, const void * addr, unsigned long size)
{
        return 0;
}
 
/*
 * The exception table consists of pairs of addresses: the first is the
 * address of an instruction that is allowed to fault, and the second is
 * the address at which the program should continue.  No registers are
 * modified, so it is entirely up to the continuation code to figure out
 * what to do.
 *
 * All the routines below use bits of fixup code that are out of line
 * with the main instruction path.  This means when everything is well,
 * we don't even have to jump over them.  Further, they do not intrude
 * on our cache or tlb entries.
 *
 * There is a special way how to put a range of potentially faulting
 * insns (like twenty ldd/std's with now intervening other instructions)
 * You specify address of first in insn and 0 in fixup and in the next
 * exception_table_entry you specify last potentially faulting insn + 1
 * and in fixup the routine which should handle the fault.
 * That fixup code will get
 * (faulting_insn_address - first_insn_in_the_range_address)/4
 * in %g2 (ie. index of the faulting instruction in the range).
 */
 
struct exception_table_entry
{
        unsigned insn, fixup;
};
 
/* Returns 0 if exception not found and fixup otherwise.  */
extern unsigned long search_exception_table(unsigned long, unsigned long *);
 
extern void __ret_efault(void);
 
/* Uh, these should become the main single-value transfer routines..
 * They automatically use the right size if we just have the right
 * pointer type..
 *
 * This gets kind of ugly. We want to return _two_ values in "get_user()"
 * and yet we don't want to do any pointers, because that is too much
 * of a performance impact. Thus we have a few rather ugly macros here,
 * and hide all the uglyness from the user.
 */
#define put_user(x,ptr) ({ \
unsigned long __pu_addr = (unsigned long)(ptr); \
__put_user_nocheck((__typeof__(*(ptr)))(x),__pu_addr,sizeof(*(ptr))); })
 
#define get_user(x,ptr) ({ \
unsigned long __gu_addr = (unsigned long)(ptr); \
__get_user_nocheck((x),__gu_addr,sizeof(*(ptr)),__typeof__(*(ptr))); })
 
#define __put_user(x,ptr) put_user(x,ptr)
#define __get_user(x,ptr) get_user(x,ptr)
 
struct __large_struct { unsigned long buf[100]; };
#define __m(x) ((struct __large_struct *)(x))
 
#define __put_user_nocheck(data,addr,size) ({ \
register int __pu_ret; \
switch (size) { \
case 1: __put_user_asm(data,b,addr,__pu_ret); break; \
case 2: __put_user_asm(data,h,addr,__pu_ret); break; \
case 4: __put_user_asm(data,w,addr,__pu_ret); break; \
case 8: __put_user_asm(data,x,addr,__pu_ret); break; \
default: __pu_ret = __put_user_bad(); break; \
} __pu_ret; })
 
#define __put_user_nocheck_ret(data,addr,size,retval) ({ \
register int __foo __asm__ ("l1"); \
switch (size) { \
case 1: __put_user_asm_ret(data,b,addr,retval,__foo); break; \
case 2: __put_user_asm_ret(data,h,addr,retval,__foo); break; \
case 4: __put_user_asm_ret(data,w,addr,retval,__foo); break; \
case 8: __put_user_asm_ret(data,x,addr,retval,__foo); break; \
default: if (__put_user_bad()) return retval; break; \
} })
 
#define __put_user_asm(x,size,addr,ret)                                 \
__asm__ __volatile__(                                                   \
        "/* Put user asm, inline. */\n"                                 \
"1:\t"  "st"#size "a %1, [%2] %%asi\n\t"                                \
        "clr    %0\n"                                                   \
"2:\n\n\t"                                                              \
        ".section .fixup,#alloc,#execinstr\n\t"                         \
        ".align 4\n"                                                    \
"3:\n\t"                                                                \
        "b      2b\n\t"                                                 \
        " mov   %3, %0\n\n\t"                                           \
        ".previous\n\t"                                                 \
        ".section __ex_table,#alloc\n\t"                                \
        ".align 4\n\t"                                                  \
        ".word  1b, 3b\n\t"                                             \
        ".previous\n\n\t"                                               \
       : "=r" (ret) : "r" (x), "r" (__m(addr)),                         \
         "i" (-EFAULT))
 
#define __put_user_asm_ret(x,size,addr,ret,foo)                         \
if (__builtin_constant_p(ret) && ret == -EFAULT)                        \
__asm__ __volatile__(                                                   \
        "/* Put user asm ret, inline. */\n"                             \
"1:\t"  "st"#size "a %1, [%2] %%asi\n\n\t"                              \
        ".section __ex_table,#alloc\n\t"                                \
        ".align 4\n\t"                                                  \
        ".word  1b, __ret_efault\n\n\t"                                 \
        ".previous\n\n\t"                                               \
       : "=r" (foo) : "r" (x), "r" (__m(addr)));                        \
else                                                                    \
__asm__ __volatile(                                                     \
        "/* Put user asm ret, inline. */\n"                             \
"1:\t"  "st"#size "a %1, [%2] %%asi\n\n\t"                              \
        ".section .fixup,#alloc,#execinstr\n\t"                         \
        ".align 4\n"                                                    \
"3:\n\t"                                                                \
        "ret\n\t"                                                       \
        " restore %%g0, %3, %%o0\n\n\t"                                 \
        ".previous\n\t"                                                 \
        ".section __ex_table,#alloc\n\t"                                \
        ".align 4\n\t"                                                  \
        ".word  1b, 3b\n\n\t"                                           \
        ".previous\n\n\t"                                               \
       : "=r" (foo) : "r" (x), "r" (__m(addr)),                         \
         "i" (ret))
 
extern int __put_user_bad(void);
 
#define __get_user_nocheck(data,addr,size,type) ({ \
register int __gu_ret; \
register unsigned long __gu_val; \
switch (size) { \
case 1: __get_user_asm(__gu_val,ub,addr,__gu_ret); break; \
case 2: __get_user_asm(__gu_val,uh,addr,__gu_ret); break; \
case 4: __get_user_asm(__gu_val,uw,addr,__gu_ret); break; \
case 8: __get_user_asm(__gu_val,x,addr,__gu_ret); break; \
default: __gu_val = 0; __gu_ret = __get_user_bad(); break; \
} data = (type) __gu_val; __gu_ret; })
 
#define __get_user_nocheck_ret(data,addr,size,type,retval) ({ \
register unsigned long __gu_val __asm__ ("l1"); \
switch (size) { \
case 1: __get_user_asm_ret(__gu_val,ub,addr,retval); break; \
case 2: __get_user_asm_ret(__gu_val,uh,addr,retval); break; \
case 4: __get_user_asm_ret(__gu_val,uw,addr,retval); break; \
case 8: __get_user_asm_ret(__gu_val,x,addr,retval); break; \
default: if (__get_user_bad()) return retval; \
} data = (type) __gu_val; })
 
#define __get_user_asm(x,size,addr,ret)                                 \
__asm__ __volatile__(                                                   \
        "/* Get user asm, inline. */\n"                                 \
"1:\t"  "ld"#size "a [%2] %%asi, %1\n\t"                                \
        "clr    %0\n"                                                   \
"2:\n\n\t"                                                              \
        ".section .fixup,#alloc,#execinstr\n\t"                         \
        ".align 4\n"                                                    \
"3:\n\t"                                                                \
        "clr    %1\n\t"                                                 \
        "b      2b\n\t"                                                 \
        " mov   %3, %0\n\n\t"                                           \
        ".previous\n\t"                                                 \
        ".section __ex_table,#alloc\n\t"                                \
        ".align 4\n\t"                                                  \
        ".word  1b, 3b\n\n\t"                                           \
        ".previous\n\t"                                                 \
       : "=r" (ret), "=r" (x) : "r" (__m(addr)),                        \
         "i" (-EFAULT))
 
#define __get_user_asm_ret(x,size,addr,retval)                          \
if (__builtin_constant_p(retval) && retval == -EFAULT)                  \
__asm__ __volatile__(                                                   \
        "/* Get user asm ret, inline. */\n"                             \
"1:\t"  "ld"#size "a [%1] %%asi, %0\n\n\t"                              \
        ".section __ex_table,#alloc\n\t"                                \
        ".align 4\n\t"                                                  \
        ".word  1b,__ret_efault\n\n\t"                                  \
        ".previous\n\t"                                                 \
       : "=r" (x) : "r" (__m(addr)));                                   \
else                                                                    \
__asm__ __volatile__(                                                   \
        "/* Get user asm ret, inline. */\n"                             \
"1:\t"  "ld"#size "a [%1] %%asi, %0\n\n\t"                              \
        ".section .fixup,#alloc,#execinstr\n\t"                         \
        ".align 4\n"                                                    \
"3:\n\t"                                                                \
        "ret\n\t"                                                       \
        " restore %%g0, %2, %%o0\n\n\t"                                 \
        ".previous\n\t"                                                 \
        ".section __ex_table,#alloc\n\t"                                \
        ".align 4\n\t"                                                  \
        ".word  1b, 3b\n\n\t"                                           \
        ".previous\n\t"                                                 \
       : "=r" (x) : "r" (__m(addr)), "i" (retval))
 
extern int __get_user_bad(void);
 
extern __kernel_size_t __copy_from_user(void *to, const void *from,
                                        __kernel_size_t size);
 
extern __kernel_size_t __copy_to_user(void *to, const void *from,
                                      __kernel_size_t size);
 
extern __kernel_size_t __copy_in_user(void *to, const void *from,
                                      __kernel_size_t size);
 
#define copy_from_user(to,from,n)               \
        __copy_from_user((void *)(to),  \
                    (void *)(from), (__kernel_size_t)(n))
 
#define copy_to_user(to,from,n) \
        __copy_to_user((void *)(to), \
        (void *) (from), (__kernel_size_t)(n))
 
#define copy_in_user(to,from,n) \
        __copy_in_user((void *)(to), \
        (void *) (from), (__kernel_size_t)(n))
 
extern __inline__ __kernel_size_t __clear_user(void *addr, __kernel_size_t size)
{
        extern __kernel_size_t __bzero_noasi(void *addr, __kernel_size_t size);
 
        return __bzero_noasi(addr, size);
}
 
#define clear_user(addr,n) \
        __clear_user((void *)(addr), (__kernel_size_t)(n))
 
extern int __strncpy_from_user(unsigned long dest, unsigned long src, int count);
 
#define strncpy_from_user(dest,src,count) \
        __strncpy_from_user((unsigned long)(dest), (unsigned long)(src), (int)(count))
 
extern int __strlen_user(const char *);
extern int __strnlen_user(const char *, long len);
 
#define strlen_user __strlen_user
#define strnlen_user __strnlen_user
 
#endif  /* __ASSEMBLY__ */
 
#endif /* _ASM_UACCESS_H */

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-sparc64/] [uaccess.h] - Blame information for rev 1774

Line No.	Rev	Author	Line
1	1276	phoenix	`/* $Id: uaccess.h,v 1.1.1.1 2004-04-15 03:01:05 phoenix Exp $ */`
2			`#ifndef _ASM_UACCESS_H`
3			`#define _ASM_UACCESS_H`
4
5			`/*`
6			`* User space memory access functions`
7			`*/`
8
9			`#ifdef __KERNEL__`
10			`#include <linux/sched.h>`
11			`#include <linux/string.h>`
12			`#include <asm/a.out.h>`
13			`#include <asm/asi.h>`
14			`#include <asm/system.h>`
15			`#include <asm/spitfire.h>`
16			`#endif`
17
18			`#ifndef __ASSEMBLY__`
19
20			`/*`
21			`* Sparc64 is segmented, though more like the M68K than the I386.`
22			`* We use the secondary ASI to address user memory, which references a`
23			`* completely different VM map, thus there is zero chance of the user`
24			`* doing something queer and tricking us into poking kernel memory.`
25			`*`
26			`* What is left here is basically what is needed for the other parts of`
27			`* the kernel that expect to be able to manipulate, erum, "segments".`
28			`* Or perhaps more properly, permissions.`
29			`*`
30			`* "For historical reasons, these macros are grossly misnamed." -Linus`
31			`*/`
32
33			`#define KERNEL_DS ((mm_segment_t) { ASI_P })`
34			`#define USER_DS ((mm_segment_t) { ASI_AIUS }) /* har har har */`
35
36			`#define VERIFY_READ 0`
37			`#define VERIFY_WRITE 1`
38
39			`#define get_fs() (current->thread.current_ds)`
40			`#define get_ds() (KERNEL_DS)`
41
42			`#define segment_eq(a,b) ((a).seg == (b).seg)`
43
44			`#define set_fs(val) \`
45			`do { \`
46			`current->thread.current_ds = (val); \`
47			`__asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg)); \`
48			`} while(0)`
49
50			`#define __user_ok(addr,size) 1`
51			`#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))`
52			`#define __access_ok(addr,size) 1`
53			`#define access_ok(type,addr,size) 1`
54
55			`extern inline int verify_area(int type, const void * addr, unsigned long size)`
56			`{`
57			`return 0;`
58			`}`
59
60			`/*`
61			`* The exception table consists of pairs of addresses: the first is the`
62			`* address of an instruction that is allowed to fault, and the second is`
63			`* the address at which the program should continue. No registers are`
64			`* modified, so it is entirely up to the continuation code to figure out`
65			`* what to do.`
66			`*`
67			`* All the routines below use bits of fixup code that are out of line`
68			`* with the main instruction path. This means when everything is well,`
69			`* we don't even have to jump over them. Further, they do not intrude`
70			`* on our cache or tlb entries.`
71			`*`
72			`* There is a special way how to put a range of potentially faulting`
73			`* insns (like twenty ldd/std's with now intervening other instructions)`
74			`* You specify address of first in insn and 0 in fixup and in the next`
75			`* exception_table_entry you specify last potentially faulting insn + 1`
76			`* and in fixup the routine which should handle the fault.`
77			`* That fixup code will get`
78			`* (faulting_insn_address - first_insn_in_the_range_address)/4`
79			`* in %g2 (ie. index of the faulting instruction in the range).`
80			`*/`
81
82			`struct exception_table_entry`
83			`{`
84			`unsigned insn, fixup;`
85			`};`
86
87			`/* Returns 0 if exception not found and fixup otherwise. */`
88			`extern unsigned long search_exception_table(unsigned long, unsigned long *);`
89
90			`extern void __ret_efault(void);`
91
92			`/* Uh, these should become the main single-value transfer routines..`
93			`* They automatically use the right size if we just have the right`
94			`* pointer type..`
95			`*`
96			`* This gets kind of ugly. We want to return _two_ values in "get_user()"`
97			`* and yet we don't want to do any pointers, because that is too much`
98			`* of a performance impact. Thus we have a few rather ugly macros here,`
99			`* and hide all the uglyness from the user.`
100			`*/`
101			`#define put_user(x,ptr) ({ \`
102			`unsigned long __pu_addr = (unsigned long)(ptr); \`
103			`__put_user_nocheck((__typeof__((ptr)))(x),__pu_addr,sizeof((ptr))); })`
104
105			`#define get_user(x,ptr) ({ \`
106			`unsigned long __gu_addr = (unsigned long)(ptr); \`
107			`__get_user_nocheck((x),__gu_addr,sizeof((ptr)),__typeof__((ptr))); })`
108
109			`#define __put_user(x,ptr) put_user(x,ptr)`
110			`#define __get_user(x,ptr) get_user(x,ptr)`
111
112			`struct __large_struct { unsigned long buf[100]; };`
113			`#define __m(x) ((struct __large_struct *)(x))`
114
115			`#define __put_user_nocheck(data,addr,size) ({ \`
116			`register int __pu_ret; \`
117			`switch (size) { \`
118			`case 1: __put_user_asm(data,b,addr,__pu_ret); break; \`
119			`case 2: __put_user_asm(data,h,addr,__pu_ret); break; \`
120			`case 4: __put_user_asm(data,w,addr,__pu_ret); break; \`
121			`case 8: __put_user_asm(data,x,addr,__pu_ret); break; \`
122			`default: __pu_ret = __put_user_bad(); break; \`
123			`} __pu_ret; })`
124
125			`#define __put_user_nocheck_ret(data,addr,size,retval) ({ \`
126			`register int __foo __asm__ ("l1"); \`
127			`switch (size) { \`
128			`case 1: __put_user_asm_ret(data,b,addr,retval,__foo); break; \`
129			`case 2: __put_user_asm_ret(data,h,addr,retval,__foo); break; \`
130			`case 4: __put_user_asm_ret(data,w,addr,retval,__foo); break; \`
131			`case 8: __put_user_asm_ret(data,x,addr,retval,__foo); break; \`
132			`default: if (__put_user_bad()) return retval; break; \`
133			`} })`
134
135			`#define __put_user_asm(x,size,addr,ret) \`
136			`__asm__ __volatile__( \`
137			`"/* Put user asm, inline. */\n" \`
138			`"1:\t" "st"#size "a %1, [%2] %%asi\n\t" \`
139			`"clr %0\n" \`
140			`"2:\n\n\t" \`
141			`".section .fixup,#alloc,#execinstr\n\t" \`
142			`".align 4\n" \`
143			`"3:\n\t" \`
144			`"b 2b\n\t" \`
145			`" mov %3, %0\n\n\t" \`
146			`".previous\n\t" \`
147			`".section __ex_table,#alloc\n\t" \`
148			`".align 4\n\t" \`
149			`".word 1b, 3b\n\t" \`
150			`".previous\n\n\t" \`
151			`: "=r" (ret) : "r" (x), "r" (__m(addr)), \`
152			`"i" (-EFAULT))`
153
154			`#define __put_user_asm_ret(x,size,addr,ret,foo) \`
155			`if (__builtin_constant_p(ret) && ret == -EFAULT) \`
156			`__asm__ __volatile__( \`
157			`"/* Put user asm ret, inline. */\n" \`
158			`"1:\t" "st"#size "a %1, [%2] %%asi\n\n\t" \`
159			`".section __ex_table,#alloc\n\t" \`
160			`".align 4\n\t" \`
161			`".word 1b, __ret_efault\n\n\t" \`
162			`".previous\n\n\t" \`
163			`: "=r" (foo) : "r" (x), "r" (__m(addr))); \`
164			`else \`
165			`__asm__ __volatile( \`
166			`"/* Put user asm ret, inline. */\n" \`
167			`"1:\t" "st"#size "a %1, [%2] %%asi\n\n\t" \`
168			`".section .fixup,#alloc,#execinstr\n\t" \`
169			`".align 4\n" \`
170			`"3:\n\t" \`
171			`"ret\n\t" \`
172			`" restore %%g0, %3, %%o0\n\n\t" \`
173			`".previous\n\t" \`
174			`".section __ex_table,#alloc\n\t" \`
175			`".align 4\n\t" \`
176			`".word 1b, 3b\n\n\t" \`
177			`".previous\n\n\t" \`
178			`: "=r" (foo) : "r" (x), "r" (__m(addr)), \`
179			`"i" (ret))`
180
181			`extern int __put_user_bad(void);`
182
183			`#define __get_user_nocheck(data,addr,size,type) ({ \`
184			`register int __gu_ret; \`
185			`register unsigned long __gu_val; \`
186			`switch (size) { \`
187			`case 1: __get_user_asm(__gu_val,ub,addr,__gu_ret); break; \`
188			`case 2: __get_user_asm(__gu_val,uh,addr,__gu_ret); break; \`
189			`case 4: __get_user_asm(__gu_val,uw,addr,__gu_ret); break; \`
190			`case 8: __get_user_asm(__gu_val,x,addr,__gu_ret); break; \`
191			`default: __gu_val = 0; __gu_ret = __get_user_bad(); break; \`
192			`} data = (type) __gu_val; __gu_ret; })`
193
194			`#define __get_user_nocheck_ret(data,addr,size,type,retval) ({ \`
195			`register unsigned long __gu_val __asm__ ("l1"); \`
196			`switch (size) { \`
197			`case 1: __get_user_asm_ret(__gu_val,ub,addr,retval); break; \`
198			`case 2: __get_user_asm_ret(__gu_val,uh,addr,retval); break; \`
199			`case 4: __get_user_asm_ret(__gu_val,uw,addr,retval); break; \`
200			`case 8: __get_user_asm_ret(__gu_val,x,addr,retval); break; \`
201			`default: if (__get_user_bad()) return retval; \`
202			`} data = (type) __gu_val; })`
203
204			`#define __get_user_asm(x,size,addr,ret) \`
205			`__asm__ __volatile__( \`
206			`"/* Get user asm, inline. */\n" \`
207			`"1:\t" "ld"#size "a [%2] %%asi, %1\n\t" \`
208			`"clr %0\n" \`
209			`"2:\n\n\t" \`
210			`".section .fixup,#alloc,#execinstr\n\t" \`
211			`".align 4\n" \`
212			`"3:\n\t" \`
213			`"clr %1\n\t" \`
214			`"b 2b\n\t" \`
215			`" mov %3, %0\n\n\t" \`
216			`".previous\n\t" \`
217			`".section __ex_table,#alloc\n\t" \`
218			`".align 4\n\t" \`
219			`".word 1b, 3b\n\n\t" \`
220			`".previous\n\t" \`
221			`: "=r" (ret), "=r" (x) : "r" (__m(addr)), \`
222			`"i" (-EFAULT))`
223
224			`#define __get_user_asm_ret(x,size,addr,retval) \`
225			`if (__builtin_constant_p(retval) && retval == -EFAULT) \`
226			`__asm__ __volatile__( \`
227			`"/* Get user asm ret, inline. */\n" \`
228			`"1:\t" "ld"#size "a [%1] %%asi, %0\n\n\t" \`
229			`".section __ex_table,#alloc\n\t" \`
230			`".align 4\n\t" \`
231			`".word 1b,__ret_efault\n\n\t" \`
232			`".previous\n\t" \`
233			`: "=r" (x) : "r" (__m(addr))); \`
234			`else \`
235			`__asm__ __volatile__( \`
236			`"/* Get user asm ret, inline. */\n" \`
237			`"1:\t" "ld"#size "a [%1] %%asi, %0\n\n\t" \`
238			`".section .fixup,#alloc,#execinstr\n\t" \`
239			`".align 4\n" \`
240			`"3:\n\t" \`
241			`"ret\n\t" \`
242			`" restore %%g0, %2, %%o0\n\n\t" \`
243			`".previous\n\t" \`
244			`".section __ex_table,#alloc\n\t" \`
245			`".align 4\n\t" \`
246			`".word 1b, 3b\n\n\t" \`
247			`".previous\n\t" \`
248			`: "=r" (x) : "r" (__m(addr)), "i" (retval))`
249
250			`extern int __get_user_bad(void);`
251
252			`extern __kernel_size_t __copy_from_user(void to, const void from,`
253			`__kernel_size_t size);`
254
255			`extern __kernel_size_t __copy_to_user(void to, const void from,`
256			`__kernel_size_t size);`
257
258			`extern __kernel_size_t __copy_in_user(void to, const void from,`
259			`__kernel_size_t size);`
260
261			`#define copy_from_user(to,from,n) \`
262			`__copy_from_user((void *)(to), \`
263			`(void *)(from), (__kernel_size_t)(n))`
264
265			`#define copy_to_user(to,from,n) \`
266			`__copy_to_user((void *)(to), \`
267			`(void *) (from), (__kernel_size_t)(n))`
268
269			`#define copy_in_user(to,from,n) \`
270			`__copy_in_user((void *)(to), \`
271			`(void *) (from), (__kernel_size_t)(n))`
272
273			`extern __inline__ __kernel_size_t __clear_user(void *addr, __kernel_size_t size)`
274			`{`
275			`extern __kernel_size_t __bzero_noasi(void *addr, __kernel_size_t size);`
276
277			`return __bzero_noasi(addr, size);`
278			`}`
279
280			`#define clear_user(addr,n) \`
281			`__clear_user((void *)(addr), (__kernel_size_t)(n))`
282
283			`extern int __strncpy_from_user(unsigned long dest, unsigned long src, int count);`
284
285			`#define strncpy_from_user(dest,src,count) \`
286			`__strncpy_from_user((unsigned long)(dest), (unsigned long)(src), (int)(count))`
287
288			`extern int __strlen_user(const char *);`
289			`extern int __strnlen_user(const char *, long len);`
290
291			`#define strlen_user __strlen_user`
292			`#define strnlen_user __strnlen_user`
293
294			`#endif /* __ASSEMBLY__ */`
295
296			`#endif /* _ASM_UACCESS_H */`