usercopy.c File Reference

#include <linux/prefetch.h>
#include <linux/string.h>
#include <linux/thread_info.h>
#include <asm/uaccess.h>

Go to the source code of this file.

Macros
#define	__do_strncpy_from_user(dst, src, count, res)
#define	__do_clear_user(addr, size)

Functions
unsigned long	__generic_copy_to_user (void __user *to, const void *from, unsigned long n)
unsigned long	__generic_copy_from_user (void *to, const void __user *from, unsigned long n)
long	__strncpy_from_user (char *dst, const char __user *src, long count)
long	strncpy_from_user (char *dst, const char __user *src, long count)
unsigned long	clear_user (void __user *to, unsigned long n)
unsigned long	__clear_user (void __user *to, unsigned long n)
long	strnlen_user (const char __user *s, long n)

Macro Definition Documentation

#define __do_clear_user	(		addr,
			size
	)

Definition at line 179 of file usercopy.c.

#define __do_strncpy_from_user	(		dst,
			src,
			count,
			res
	)

Definition at line 75 of file usercopy.c.

Function Documentation

unsigned long __clear_user	(	void __user *	mem,
		unsigned long	len
	)

__clear_user: - Zero a block of memory in user space, with less checking. : Destination address, in user space.
: Number of bytes to zero.

Zero a block of memory in user space. Caller must check the specified block with access_ok() before calling this function.

Returns number of bytes that could not be cleared. On success, this will be zero.

Definition at line 232 of file usercopy.c.

unsigned long __generic_copy_from_user	(	void *	to,
		const void __user *	from,
		unsigned long	n
	)

Definition at line 24 of file usercopy.c.

unsigned long __generic_copy_to_user	(	void __user *	to,
		const void *	from,
		unsigned long	n
	)

Definition at line 15 of file usercopy.c.

long __strncpy_from_user	(	char *	dst,
		const char __user *	src,
		long	count
	)

Definition at line 113 of file usercopy.c.

unsigned long clear_user	(	void __user *	mem,
		unsigned long	len
	)

clear_user: - Zero a block of memory in user space. : Destination address, in user space.
: Number of bytes to zero.

Zero a block of memory in user space. Caller must check the specified block with access_ok() before calling this function.

Returns number of bytes that could not be cleared. On success, this will be zero.

Definition at line 224 of file usercopy.c.

long strncpy_from_user	(	char *	dst,
		const char __user *	src,
		long	count
	)

Definition at line 121 of file usercopy.c.

long strnlen_user	(	const char __user *	s,
		long	n
	)

Definition at line 315 of file usercopy.c.