diff options
Diffstat (limited to 'include/asm-x86/uaccess_64.h')
| -rw-r--r-- | include/asm-x86/uaccess_64.h | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/include/asm-x86/uaccess_64.h b/include/asm-x86/uaccess_64.h deleted file mode 100644 index c96c1f5d07a..00000000000 --- a/include/asm-x86/uaccess_64.h +++ /dev/null @@ -1,202 +0,0 @@ -#ifndef ASM_X86__UACCESS_64_H -#define ASM_X86__UACCESS_64_H - -/* - * User space memory access functions - */ -#include <linux/compiler.h> -#include <linux/errno.h> -#include <linux/prefetch.h> -#include <linux/lockdep.h> -#include <asm/page.h> - -/* - * Copy To/From Userspace - */ - -/* Handles exceptions in both to and from, but doesn't do access_ok */ -__must_check unsigned long -copy_user_generic(void *to, const void *from, unsigned len); - -__must_check unsigned long -copy_to_user(void __user *to, const void *from, unsigned len); -__must_check unsigned long -copy_from_user(void *to, const void __user *from, unsigned len); -__must_check unsigned long -copy_in_user(void __user *to, const void __user *from, unsigned len); - -static __always_inline __must_check -int __copy_from_user(void *dst, const void __user *src, unsigned size) -{ - int ret = 0; - if (!__builtin_constant_p(size)) - return copy_user_generic(dst, (__force void *)src, size); - switch (size) { - case 1:__get_user_asm(*(u8 *)dst, (u8 __user *)src, - ret, "b", "b", "=q", 1); - return ret; - case 2:__get_user_asm(*(u16 *)dst, (u16 __user *)src, - ret, "w", "w", "=r", 2); - return ret; - case 4:__get_user_asm(*(u32 *)dst, (u32 __user *)src, - ret, "l", "k", "=r", 4); - return ret; - case 8:__get_user_asm(*(u64 *)dst, (u64 __user *)src, - ret, "q", "", "=r", 8); - return ret; - case 10: - __get_user_asm(*(u64 *)dst, (u64 __user *)src, - ret, "q", "", "=r", 16); - if (unlikely(ret)) - return ret; - __get_user_asm(*(u16 *)(8 + (char *)dst), - (u16 __user *)(8 + (char __user *)src), - ret, "w", "w", "=r", 2); - return ret; - case 16: - __get_user_asm(*(u64 *)dst, (u64 __user *)src, - ret, "q", "", "=r", 16); - if (unlikely(ret)) - return ret; - __get_user_asm(*(u64 *)(8 + (char *)dst), - (u64 __user *)(8 + (char __user *)src), - ret, "q", "", "=r", 8); - return ret; - default: - return copy_user_generic(dst, (__force void *)src, size); - } -} - -static __always_inline __must_check -int __copy_to_user(void __user *dst, const void *src, unsigned size) -{ - int ret = 0; - if (!__builtin_constant_p(size)) - return copy_user_generic((__force void *)dst, src, size); - switch (size) { - case 1:__put_user_asm(*(u8 *)src, (u8 __user *)dst, - ret, "b", "b", "iq", 1); - return ret; - case 2:__put_user_asm(*(u16 *)src, (u16 __user *)dst, - ret, "w", "w", "ir", 2); - return ret; - case 4:__put_user_asm(*(u32 *)src, (u32 __user *)dst, - ret, "l", "k", "ir", 4); - return ret; - case 8:__put_user_asm(*(u64 *)src, (u64 __user *)dst, - ret, "q", "", "ir", 8); - return ret; - case 10: - __put_user_asm(*(u64 *)src, (u64 __user *)dst, - ret, "q", "", "ir", 10); - if (unlikely(ret)) - return ret; - asm("":::"memory"); - __put_user_asm(4[(u16 *)src], 4 + (u16 __user *)dst, - ret, "w", "w", "ir", 2); - return ret; - case 16: - __put_user_asm(*(u64 *)src, (u64 __user *)dst, - ret, "q", "", "ir", 16); - if (unlikely(ret)) - return ret; - asm("":::"memory"); - __put_user_asm(1[(u64 *)src], 1 + (u64 __user *)dst, - ret, "q", "", "ir", 8); - return ret; - default: - return copy_user_generic((__force void *)dst, src, size); - } -} - -static __always_inline __must_check -int __copy_in_user(void __user *dst, const void __user *src, unsigned size) -{ - int ret = 0; - if (!__builtin_constant_p(size)) - return copy_user_generic((__force void *)dst, - (__force void *)src, size); - switch (size) { - case 1: { - u8 tmp; - __get_user_asm(tmp, (u8 __user *)src, - ret, "b", "b", "=q", 1); - if (likely(!ret)) - __put_user_asm(tmp, (u8 __user *)dst, - ret, "b", "b", "iq", 1); - return ret; - } - case 2: { - u16 tmp; - __get_user_asm(tmp, (u16 __user *)src, - ret, "w", "w", "=r", 2); - if (likely(!ret)) - __put_user_asm(tmp, (u16 __user *)dst, - ret, "w", "w", "ir", 2); - return ret; - } - - case 4: { - u32 tmp; - __get_user_asm(tmp, (u32 __user *)src, - ret, "l", "k", "=r", 4); - if (likely(!ret)) - __put_user_asm(tmp, (u32 __user *)dst, - ret, "l", "k", "ir", 4); - return ret; - } - case 8: { - u64 tmp; - __get_user_asm(tmp, (u64 __user *)src, - ret, "q", "", "=r", 8); - if (likely(!ret)) - __put_user_asm(tmp, (u64 __user *)dst, - ret, "q", "", "ir", 8); - return ret; - } - default: - return copy_user_generic((__force void *)dst, - (__force void *)src, size); - } -} - -__must_check long -strncpy_from_user(char *dst, const char __user *src, long count); -__must_check long -__strncpy_from_user(char *dst, const char __user *src, long count); -__must_check long strnlen_user(const char __user *str, long n); -__must_check long __strnlen_user(const char __user *str, long n); -__must_check long strlen_user(const char __user *str); -__must_check unsigned long clear_user(void __user *mem, unsigned long len); -__must_check unsigned long __clear_user(void __user *mem, unsigned long len); - -__must_check long __copy_from_user_inatomic(void *dst, const void __user *src, - unsigned size); - -static __must_check __always_inline int -__copy_to_user_inatomic(void __user *dst, const void *src, unsigned size) -{ - return copy_user_generic((__force void *)dst, src, size); -} - -extern long __copy_user_nocache(void *dst, const void __user *src, - unsigned size, int zerorest); - -static inline int __copy_from_user_nocache(void *dst, const void __user *src, - unsigned size) -{ - might_sleep(); - return __copy_user_nocache(dst, src, size, 1); -} - -static inline int __copy_from_user_inatomic_nocache(void *dst, - const void __user *src, - unsigned size) -{ - return __copy_user_nocache(dst, src, size, 0); -} - -unsigned long -copy_user_handle_tail(char *to, char *from, unsigned len, unsigned zerorest); - -#endif /* ASM_X86__UACCESS_64_H */ |