usercopy.c File Reference

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

Macro Definition Documentation

#define __do_clear_user	(		addr,
			size
	)

Value:

do {                        \
    int w;                  \
    asm volatile(               \
        "   cmp 0,%0\n"     \
        "   beq 1f\n"       \
        "   clr %1\n"       \
        "0: movbu %1,(%3,%2)\n" \
        "   inc %3\n"       \
        "   cmp %0,%3\n"        \
        "   bne 0b\n"       \
        "1:\n"              \
        "   sub %3,%0\n"        \
        "2:\n"              \
        ".section .fixup,\"ax\"\n"  \
        "3: jmp 2b\n"       \
        ".previous\n"           \
        ".section __ex_table,\"a\"\n"   \
        "       .balign 4\n"        \
        "       .long 0b,3b\n"      \
        ".previous\n"           \
        : "+r"(size), "=&r"(w)      \
        : "a"(addr), "d"(0)     \
        : "memory", "cc");      \
} while (0)

Definition at line 89 of file usercopy.c.

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

Definition at line 33 of file usercopy.c.

Function Documentation

unsigned long __clear_user	(	void *	to,
		unsigned long	n
	)

Definition at line 116 of file usercopy.c.

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

Definition at line 23 of file usercopy.c.

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

Definition at line 15 of file usercopy.c.

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

Definition at line 69 of file usercopy.c.

unsigned long clear_user	(	void *	to,
		unsigned long	n
	)

Definition at line 123 of file usercopy.c.

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

Definition at line 77 of file usercopy.c.

long strnlen_user	(	const char *	s,
		long	n
	)

Definition at line 135 of file usercopy.c.