1 /* SPDX-License-Identifier: GPL-2.0-or-later */
11  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
25 #include <asm-generic/access_ok.h>
28  * These are the main single-value transfer routines.  They automatically
29  * use the right size if we just have the right pointer type.
45 #define get_user(x, ptr) \  argument
46 	__get_user_check((x), (ptr), sizeof(*(ptr)))
47 #define put_user(x, ptr) \  argument
48 	__put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
50 #define __get_user(x, ptr) \  argument
51 	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
52 #define __put_user(x, ptr) \  argument
53 	__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
57 #define __put_user_nocheck(x, ptr, size)		\  argument
60 	__put_user_size((x), (ptr), (size), __pu_err);	\
64 #define __put_user_check(x, ptr, size)					\  argument
66 	long __pu_err = -EFAULT;					\
68 	if (access_ok(__pu_addr, size))			\
69 		__put_user_size((x), __pu_addr, (size), __pu_err);	\
73 #define __put_user_size(x, ptr, size, retval)				\  argument
76 	switch (size) {							\
77 	case 1: __put_user_asm(x, ptr, retval, "l.sb"); break;		\
78 	case 2: __put_user_asm(x, ptr, retval, "l.sh"); break;		\
79 	case 4: __put_user_asm(x, ptr, retval, "l.sw"); break;		\
80 	case 8: __put_user_asm2(x, ptr, retval); break;			\
88 #define __m(x) (*(struct __large_struct *)(x))  argument
95 #define __put_user_asm(x, addr, err, op)			\  argument
109 		: "r"(x), "r"(addr), "i"(-EFAULT), "0"(err))
111 #define __put_user_asm2(x, addr, err)				\  argument
127 		: "r"(x), "r"(addr), "i"(-EFAULT), "0"(err))
129 #define __get_user_nocheck(x, ptr, size)			\  argument
132 	__get_user_size((x), (ptr), (size), __gu_err);		\
136 #define __get_user_check(x, ptr, size)					\  argument
138 	long __gu_err = -EFAULT;					\
140 	if (access_ok(__gu_addr, size))					\
141 		__get_user_size((x), __gu_addr, (size), __gu_err);	\
143 		(x) = (__typeof__(*(ptr))) 0;				\
149 #define __get_user_size(x, ptr, size, retval)				\  argument
152 	switch (size) {							\
153 	case 1: __get_user_asm(x, ptr, retval, "l.lbz"); break;		\
154 	case 2: __get_user_asm(x, ptr, retval, "l.lhz"); break;		\
155 	case 4: __get_user_asm(x, ptr, retval, "l.lwz"); break;		\
156 	case 8: __get_user_asm2(x, ptr, retval); break;			\
157 	default: (x) = (__typeof__(*(ptr)))__get_user_bad();		\
161 #define __get_user_asm(x, addr, err, op)		\  argument
178 		: "r"(addr), "i"(-EFAULT), "0"(err));	\
179 	(x) = (__typeof__(*(addr)))__gu_tmp;		\
182 #define __get_user_asm2(x, addr, err)			\  argument
202 		: "r"(addr), "i"(-EFAULT), "0"(err));	\
203 	(x) = (__typeof__(*(addr)))(			\
204 		(__typeof__((x)-(x)))__gu_tmp);		\
210 __copy_tofrom_user(void *to, const void *from, unsigned long size);
212 raw_copy_from_user(void *to, const void __user *from, unsigned long size)  in raw_copy_from_user()  argument
214 	return __copy_tofrom_user(to, (__force const void *)from, size);  in raw_copy_from_user()
217 raw_copy_to_user(void __user *to, const void *from, unsigned long size)  in raw_copy_to_user()  argument
219 	return __copy_tofrom_user((__force void *)to, from, size);  in raw_copy_to_user()
224 extern unsigned long __clear_user(void __user *addr, unsigned long size);
227 clear_user(void __user *addr, unsigned long size)  in clear_user()  argument
229 	if (likely(access_ok(addr, size)))  in clear_user()
230 		size = __clear_user(addr, size);  in clear_user()
231 	return size;  in clear_user()