uaccess_pt.c File Reference

#include <linux/errno.h>
#include <linux/hardirq.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <asm/uaccess.h>
#include <asm/futex.h>
#include "uaccess.h"

Go to the source code of this file.

Macros
#define	__futex_atomic_op(insn, ret, oldval, newval, uaddr, oparg)

Functions
size_t	copy_from_user_pt (size_t n, const void __user *from, void *to)
size_t	copy_to_user_pt (size_t n, void __user *to, const void *from)
int	futex_atomic_op_pt (int op, u32 __user *uaddr, int oparg, int *old)
int	futex_atomic_cmpxchg_pt (u32 *uval, u32 __user *uaddr, u32 oldval, u32 newval)

Variables
struct uaccess_ops	uaccess_pt

Macro Definition Documentation

#define __futex_atomic_op	(		insn,
			ret,
			oldval,
			newval,
			uaddr,
			oparg
	)

Value:

asm volatile("0: l   %1,0(%6)\n"                \
             "1: " insn                     \
             "2: cs  %1,%2,0(%6)\n"             \
             "3: jl  1b\n"                  \
             "   lhi %0,0\n"                    \
             "4:\n"                     \
             EX_TABLE(0b,4b) EX_TABLE(2b,4b) EX_TABLE(3b,4b)    \
             : "=d" (ret), "=&d" (oldval), "=&d" (newval),  \
               "=m" (*uaddr)                    \
             : "0" (-EFAULT), "d" (oparg), "a" (uaddr),     \
               "m" (*uaddr) : "cc" );

Definition at line 274 of file uaccess_pt.c.

Function Documentation

size_t copy_from_user_pt	(	size_t	n,
		const void __user *	from,
		void *	to
	)

Definition at line 122 of file uaccess_pt.c.

size_t copy_to_user_pt	(	size_t	n,
		void __user *	to,
		const void *	from
	)

Definition at line 136 of file uaccess_pt.c.

int futex_atomic_cmpxchg_pt	(	u32 *	uval,
		u32 __user *	uaddr,
		u32	oldval,
		u32	newval
	)

Definition at line 356 of file uaccess_pt.c.

int futex_atomic_op_pt	(	int	op,
		u32 __user *	uaddr,
		int	oparg,
		int *	old
	)

Definition at line 320 of file uaccess_pt.c.

Variable Documentation

struct uaccess_ops uaccess_pt

Initial value:

= {
    .copy_from_user     = copy_from_user_pt,
    .copy_from_user_small   = copy_from_user_pt,
    .copy_to_user       = copy_to_user_pt,
    .copy_to_user_small = copy_to_user_pt,
    .copy_in_user       = copy_in_user_pt,
    .clear_user     = clear_user_pt,
    .strnlen_user       = strnlen_user_pt,
    .strncpy_from_user  = strncpy_from_user_pt,
    .futex_atomic_op    = futex_atomic_op_pt,
    .futex_atomic_cmpxchg   = futex_atomic_cmpxchg_pt,
}

Definition at line 377 of file uaccess_pt.c.