include/asm/uaccess.h

18  * the "moves" instruction to access user space from kernel space. Other
23  * So lets keep the code simple and just define in what we need to use.
182 unsigned long __generic_copy_from_user(void *to, const void __user *from, unsigned long n);
183 unsigned long __generic_copy_to_user(void __user *to, const void *from, unsigned long n);
190 #define ____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\
225 		: "+d" (res), "+&a" (to), "+a" (from), "=&d" (tmp)	\
228 #define ___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)\
229 	____constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3, s1, s2, s3)
230 #define __constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3)	\
231 	___constant_copy_from_user_asm(res, to, from, tmp, n1, n2, n3,  \
235 __constant_copy_from_user(void *to, const void __user *from, unsigned long n)
241 		__constant_copy_from_user_asm(res, to, from, tmp, 1, 0, 0);
244 		__constant_copy_from_user_asm(res, to, from, tmp, 2, 0, 0);
247 		__constant_copy_from_user_asm(res, to, from, tmp, 2, 1, 0);
250 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 0, 0);
253 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 1, 0);
256 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 0);
259 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 2, 1);
262 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 0);
265 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 1);
268 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 2);
271 		__constant_copy_from_user_asm(res, to, from, tmp, 4, 4, 4);
274 		/* we limit the inlined version to 3 moves */
275 		return __generic_copy_from_user(to, from, n);
281 #define __constant_copy_to_user_asm(res, to, from, tmp, n, s1, s2, s3)	\
312 		: "+d" (res), "+a" (to), "+a" (from), "=&d" (tmp)	\
316 __constant_copy_to_user(void __user *to, const void *from, unsigned long n)
322 		__put_user_asm(MOVES, res, *(u8 *)from, (u8 __user *)to,
326 		__put_user_asm(MOVES, res, *(u16 *)from, (u16 __user *)to,
330 		__constant_copy_to_user_asm(res, to, from, tmp, 3, w, b,);
333 		__put_user_asm(MOVES, res, *(u32 *)from, (u32 __user *)to,
337 		__constant_copy_to_user_asm(res, to, from, tmp, 5, l, b,);
340 		__constant_copy_to_user_asm(res, to, from, tmp, 6, l, w,);
343 		__constant_copy_to_user_asm(res, to, from, tmp, 7, l, w, b);
346 		__constant_copy_to_user_asm(res, to, from, tmp, 8, l, l,);
349 		__constant_copy_to_user_asm(res, to, from, tmp, 9, l, l, b);
352 		__constant_copy_to_user_asm(res, to, from, tmp, 10, l, l, w);
355 		__constant_copy_to_user_asm(res, to, from, tmp, 12, l, l, l);
358 		/* limit the inlined version to 3 moves */
359 		return __generic_copy_to_user(to, from, n);
366 raw_copy_from_user(void *to, const void __user *from, unsigned long n)
369 		return __constant_copy_from_user(to, from, n);
370 	return __generic_copy_from_user(to, from, n);
374 raw_copy_to_user(void __user *to, const void *from, unsigned long n)
377 		return __constant_copy_to_user(to, from, n);
378 	return __generic_copy_to_user(to, from, n);
444 unsigned long __clear_user(void __user *to, unsigned long n);