1 /* SPDX-License-Identifier: GPL-2.0 */
15 #include <asm-generic/access_ok.h>
17 /* Uh, these should become the main single-value transfer routines..
18  * They automatically use the right size if we just have the right
26 #define put_user(x, ptr) ({ \  argument
29 	__put_user_check((__typeof__(*(ptr)))(x), __pu_addr, sizeof(*(ptr))); \
32 #define get_user(x, ptr) ({ \  argument
35 	__get_user_check((x), __gu_addr, sizeof(*(ptr)), __typeof__(*(ptr))); \
43 #define __put_user(x, ptr) \  argument
44 	__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
45 #define __get_user(x, ptr) \  argument
46     __get_user_nocheck((x), (ptr), sizeof(*(ptr)), __typeof__(*(ptr)))
49 #define __m(x) ((struct __large_struct __user *)(x))  argument
51 #define __put_user_check(x, addr, size) ({ \  argument
53 	if (__access_ok(addr, size)) { \
54 		switch (size) { \
56 			__put_user_asm(x, b, addr, __pu_ret); \
59 			__put_user_asm(x, h, addr, __pu_ret); \
62 			__put_user_asm(x, , addr, __pu_ret); \
65 			__put_user_asm(x, d, addr, __pu_ret); \
72 		__pu_ret = -EFAULT; \
77 #define __put_user_nocheck(x, addr, size) ({			\  argument
79 	switch (size) {						\
80 	case 1: __put_user_asm(x, b, addr, __pu_ret); break;	\
81 	case 2: __put_user_asm(x, h, addr, __pu_ret); break;	\
82 	case 4: __put_user_asm(x, , addr, __pu_ret); break;	\
83 	case 8: __put_user_asm(x, d, addr, __pu_ret); break;	\
89 #define __put_user_asm(x, size, addr, ret)				\  argument
92 	"1:\t"	"st"#size " %1, %2\n\t"					\
106 	       : "=&r" (ret) : "r" (x), "m" (*__m(addr)),		\
107 		 "i" (-EFAULT))
111 #define __get_user_check(x, addr, size, type) ({ \  argument
114 	if (__access_ok(addr, size)) { \
115 		switch (size) { \
135 		 __gu_ret = -EFAULT; \
137 	x = (__force type) __gu_val; \
141 #define __get_user_nocheck(x, addr, size, type) ({			\  argument
144 	switch (size) {							\
154 	x = (__force type) __gu_val;					\
158 #define __get_user_asm(x, size, addr, ret)				\  argument
161 	"1:\t"	"ld"#size " %2, %1\n\t"					\
176 	       : "=&r" (ret), "=&r" (x) : "m" (*__m(addr)),		\
177 		 "i" (-EFAULT))
181 unsigned long __copy_user(void __user *to, const void __user *from, unsigned long size);
196 static inline unsigned long __clear_user(void __user *addr, unsigned long size)  in __clear_user()  argument
205 		: "=r" (ret) : "r" (addr), "r" (size) :  in __clear_user()