uaccess.h File Reference

#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <asm/segment.h>

Go to the source code of this file.

Data Structures
struct	exception_table_entry

Macros
#define	MAKE_MM_SEG(s)   ((mm_segment_t) { (s) })
#define	KERNEL_DS   MAKE_MM_SEG(~0UL)
#define	USER_DS   MAKE_MM_SEG(TASK_SIZE - 1)
#define	get_ds()   (KERNEL_DS)
#define	get_fs()   (current_thread_info()->addr_limit)
#define	segment_eq(a, b)   ((a).seg == (b).seg)
#define	VERIFY_READ   0
#define	VERIFY_WRITE   1
#define	access_ok(type, addr, size)   __access_ok((unsigned long)(addr),(size))
#define	__put_user(x, ptr)
#define	put_user(x, ptr)
#define	__get_user(x, ptr)
#define	get_user(x, ptr)
#define	__copy_from_user_inatomic   __copy_from_user
#define	__copy_to_user_inatomic   __copy_to_user
#define	__strnlen_user(s, n)   (strnlen((s), (n)) + 1)

Functions
unsigned long	search_exception_table (unsigned long)
int	__put_user_bad (void) __attribute__((noreturn))
int	__get_user_bad (void) __attribute__((noreturn))

Macro Definition Documentation

#define __copy_from_user_inatomic   __copy_from_user

Definition at line 236 of file uaccess.h.

#define __copy_to_user_inatomic   __copy_to_user

Definition at line 240 of file uaccess.h.

#define __get_user	(		x,
			ptr
	)

Definition at line 179 of file uaccess.h.

#define __put_user	(		x,
			ptr
	)

Value:

({                              \
    __typeof__(*(ptr)) __x = (x);               \
    int __pu_err = -EFAULT;                 \
        __chk_user_ptr(ptr);                                    \
    switch (sizeof (*(ptr))) {              \
    case 1:                         \
    case 2:                         \
    case 4:                         \
    case 8:                         \
        __pu_err = __put_user_fn(sizeof (*(ptr)),   \
                     ptr, &__x);        \
        break;                      \
    default:                        \
        __put_user_bad();               \
        break;                      \
     }                          \
    __pu_err;                       \
})

Definition at line 143 of file uaccess.h.

#define __strnlen_user	(		s,
			n
	)		(strnlen((s), (n)) + 1)

Definition at line 292 of file uaccess.h.

#define access_ok	(		type,
			addr,
			size
	)		__access_ok((unsigned long)(addr),(size))

Definition at line 40 of file uaccess.h.

#define get_ds

(

void

)

(KERNEL_DS)

Definition at line 26 of file uaccess.h.

#define get_fs

(

void

)

(current_thread_info()->addr_limit)

Definition at line 27 of file uaccess.h.

#define get_user	(		x,
			ptr
	)

Value:

({                              \
    might_sleep();                      \
    access_ok(VERIFY_READ, ptr, sizeof(*ptr)) ?     \
		__get_user(x, ptr) :              \
        -EFAULT;                    \
})

Definition at line 219 of file uaccess.h.

#define KERNEL_DS   MAKE_MM_SEG(~0UL)

Definition at line 18 of file uaccess.h.

#define MAKE_MM_SEG

(

s

)

((mm_segment_t) { (s) })

Definition at line 15 of file uaccess.h.

#define put_user	(		x,
			ptr
	)

Value:

({                              \
    might_sleep();                      \
    access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)) ?        \
        __put_user(x, ptr) :                \
        -EFAULT;                    \
})

Definition at line 163 of file uaccess.h.

#define segment_eq	(		a,
			b
	)		((a).seg == (b).seg)

Definition at line 35 of file uaccess.h.

#define USER_DS   MAKE_MM_SEG(TASK_SIZE - 1)

Definition at line 22 of file uaccess.h.

#define VERIFY_READ   0

Definition at line 37 of file uaccess.h.

#define VERIFY_WRITE   1

Definition at line 38 of file uaccess.h.

Function Documentation

int __get_user_bad

(

void

)

int __put_user_bad

(

void

)

unsigned long search_exception_table

(

unsigned

long

)

Definition at line 43 of file extable.c.