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Commit 487913ab authored by Zong Li's avatar Zong Li Committed by Greentime Hu
Browse files

nds32: Extract the checking and getting pointer to a macro 



Signed-off-by: default avatarZong Li <zong@andestech.com>
Acked-by: default avatarGreentime Hu <greentime@andestech.com>
Signed-off-by: default avatarGreentime Hu <greentime@andestech.com>
parent 7ef39548

arch/nds32/include/asm/uaccess.h

+41 −39
Original line number Diff line number Diff line
@@ -75,54 +75,54 @@ static inline void set_fs(mm_segment_t fs) 
 * versions are void (ie, don't return a value as such).

 */



#define get_user(x, ptr)						\

({									\

	long __e = -EFAULT;						\

	const __typeof__(*(ptr)) __user *__p = (ptr);			\

	if (likely(access_ok(VERIFY_READ, __p, sizeof(*__p)))) {	\

		__e = __get_user(x, __p);				\

	} else {							\

		(x) = 0;						\

	}								\

	__e;								\

})

#define get_user	__get_user					\



#define __get_user(x, ptr)						\

({									\

	long __gu_err = 0;						\

	__get_user_err((x), (ptr), __gu_err);				\

	__get_user_check((x), (ptr), __gu_err);				\

	__gu_err;							\

})



#define __get_user_error(x, ptr, err)					\

({									\

	__get_user_err((x), (ptr), err);				\

	__get_user_check((x), (ptr), (err));				\

	(void)0;							\

})



#define __get_user_check(x, ptr, err)					\

({									\

	const __typeof__(*(ptr)) __user *__p = (ptr);			\

	might_fault();							\

	if (access_ok(VERIFY_READ, __p, sizeof(*__p))) {		\

		__get_user_err((x), __p, (err));			\

	} else {							\

		(x) = 0; (err) = -EFAULT;				\

	}								\

})



#define __get_user_err(x, ptr, err)					\

do {									\

	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\

	unsigned long __gu_val;						\

	__chk_user_ptr(__gu_addr);					\

	switch (sizeof(*(__gu_addr))) {					\

	__chk_user_ptr(ptr);						\

	switch (sizeof(*(ptr))) {					\

	case 1:								\

		__get_user_asm("lbi", __gu_val, __gu_addr, (err));	\

		__get_user_asm("lbi", __gu_val, (ptr), (err));		\

		break;							\

	case 2:								\

		__get_user_asm("lhi", __gu_val, __gu_addr, (err));	\

		__get_user_asm("lhi", __gu_val, (ptr), (err));		\

		break;							\

	case 4:								\

		__get_user_asm("lwi", __gu_val, __gu_addr, (err));	\

		__get_user_asm("lwi", __gu_val, (ptr), (err));		\

		break;							\

	case 8:								\

		__get_user_asm_dword(__gu_val, __gu_addr, (err));	\

		__get_user_asm_dword(__gu_val, (ptr), (err));		\

		break;							\

	default:							\

		BUILD_BUG(); 						\

		break;							\

	}								\

	(x) = (__typeof__(*(__gu_addr)))__gu_val;			\

	(x) = (__force __typeof__(*(ptr)))__gu_val;			\

} while (0)



#define __get_user_asm(inst, x, addr, err)				\
@@ -170,15 +170,7 @@ do { \ 
		: "r"(addr), "i"(-EFAULT)				\

		: "cc")



#define put_user(x, ptr)						\

({									\

	long __e = -EFAULT;						\

	__typeof__(*(ptr)) __user *__p = (ptr);				\

	if (likely(access_ok(VERIFY_WRITE, __p, sizeof(*__p)))) {	\

		__e = __put_user(x, __p);				\

	}								\

	__e;								\

})

#define put_user	__put_user					\



#define __put_user(x, ptr)						\

({									\
@@ -189,27 +181,37 @@ do { \ 


#define __put_user_error(x, ptr, err)					\

({									\

	__put_user_err((x), (ptr), err);				\

	__put_user_err((x), (ptr), (err));				\

	(void)0;							\

})



#define __put_user_check(x, ptr, err)					\

({									\

	__typeof__(*(ptr)) __user *__p = (ptr);				\

	might_fault();							\

	if (access_ok(VERIFY_WRITE, __p, sizeof(*__p))) {		\

		__put_user_err((x), __p, (err));			\

	} else	{							\

		(err) = -EFAULT;					\

	}								\

})



#define __put_user_err(x, ptr, err)					\

do {									\

	__typeof__(*(ptr)) __user *__pu_addr = (ptr);			\

	__typeof__(*(__pu_addr)) __pu_val = (x);			\

	__chk_user_ptr(__pu_addr);					\

	switch (sizeof(*(__pu_addr))) {					\

	__typeof__(*(ptr)) __pu_val = (x);				\

	__chk_user_ptr(ptr);						\

	switch (sizeof(*(ptr))) {					\

	case 1:								\

		__put_user_asm("sbi", __pu_val, __pu_addr, (err));	\

		__put_user_asm("sbi", __pu_val, (ptr), (err));		\

		break;							\

	case 2: 							\

		__put_user_asm("shi", __pu_val, __pu_addr, (err));	\

		__put_user_asm("shi", __pu_val, (ptr), (err));		\

		break;							\

	case 4: 							\

		__put_user_asm("swi", __pu_val, __pu_addr, (err));	\

		__put_user_asm("swi", __pu_val, (ptr), (err));		\

		break;							\

	case 8:								\

		__put_user_asm_dword(__pu_val, __pu_addr, (err));	\

		__put_user_asm_dword(__pu_val, (ptr), (err));		\

		break;							\

	default:							\

		BUILD_BUG(); 						\