arch/sh/include/asm/uaccess.h

Source file repositories/reference/linux-study-clean/arch/sh/include/asm/uaccess.h

File Facts

System
Linux kernel
Corpus path
arch/sh/include/asm/uaccess.h
Extension
.h
Size
4112 bytes
Lines
133
Domain
Architecture Layer
Bucket
arch/sh
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct __large_struct { unsigned long buf[100]; };
#define __m(x) (*(struct __large_struct __user *)(x))

#define __get_user_nocheck(x,ptr,size)				\
({								\
	long __gu_err;						\
	unsigned long __gu_val;					\
	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);	\
	__chk_user_ptr(ptr);					\
	__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
	(x) = (__force __typeof__(*(ptr)))__gu_val;		\
	__gu_err;						\
})

#define __get_user_check(x,ptr,size)					\
({									\
	long __gu_err = -EFAULT;					\
	unsigned long __gu_val = 0;					\
	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);			\
	if (likely(access_ok(__gu_addr, (size))))		\
		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
	__gu_err;							\
})

#define __put_user_nocheck(x,ptr,size)				\
({								\
	long __pu_err;						\
	__typeof__(*(ptr)) __user *__pu_addr = (ptr);		\
	__typeof__(*(ptr)) __pu_val = x;			\
	__chk_user_ptr(ptr);					\
	__put_user_size(__pu_val, __pu_addr, (size), __pu_err);	\
	__pu_err;						\
})

#define __put_user_check(x,ptr,size)				\
({								\
	long __pu_err = -EFAULT;				\
	__typeof__(*(ptr)) __user *__pu_addr = (ptr);		\
	__typeof__(*(ptr)) __pu_val = x;			\
	if (likely(access_ok(__pu_addr, size)))	\
		__put_user_size(__pu_val, __pu_addr, (size),	\
				__pu_err);			\
	__pu_err;						\
})

# include <asm/uaccess_32.h>

extern long strncpy_from_user(char *dest, const char __user *src, long count);

extern __must_check long strnlen_user(const char __user *str, long n);

/* Generic arbitrary sized copy.  */
/* Return the number of bytes NOT copied */
__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n);

static __always_inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
	return __copy_user(to, (__force void *)from, n);
}

static __always_inline unsigned long __must_check
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
	return __copy_user((__force void *)to, from, n);
}
#define INLINE_COPY_USER

/*
 * Clear the area and return remaining number of bytes
 * (on failure.  Usually it's 0.)
 */
__kernel_size_t __clear_user(void __user *addr, __kernel_size_t size);

#define clear_user(addr,n)						\
({									\
	void __user * __cl_addr = (addr);				\
	unsigned long __cl_size = (n);					\
									\
	if (__cl_size && access_ok(__cl_addr, __cl_size))		\
		__cl_size = __clear_user(__cl_addr, __cl_size);		\
									\
	__cl_size;							\
})

extern void *set_exception_table_vec(unsigned int vec, void *handler);

static inline void *set_exception_table_evt(unsigned int evt, void *handler)
{

Annotation

Implementation Notes