uaccess.h File Reference

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

Go to the source code of this file.

Data Structures
struct	exception_table_entry

Macros
#define	get_ds()   (KERNEL_DS)
#define	get_fs()   (current_thread_info()->addr_limit)
#define	segment_eq(a, b)   ((a) == (b))
#define	VERIFY_READ   0
#define	VERIFY_WRITE   1
#define	access_ok(type, addr, size)   _access_ok((unsigned long)(addr), (size))
#define	put_user(x, p)
#define	__put_user(x, p)   put_user(x,p)
#define	__put_user_bad()
#define	__ptr(x)   ((unsigned long *)(x))
#define	__put_user_asm(x, p, bhw)
#define	get_user(x, ptr)
#define	__get_user(x, p)   get_user(x,p)
#define	__get_user_bad()   (bad_user_access_length(), (-EFAULT))
#define	__get_user_asm(x, ptr, bhw, option)
#define	__copy_from_user(to, from, n)   copy_from_user(to, from, n)
#define	__copy_to_user(to, from, n)   copy_to_user(to, from, n)
#define	__copy_to_user_inatomic   __copy_to_user
#define	__copy_from_user_inatomic   __copy_from_user
#define	copy_to_user_ret(to, from, n, retval)
#define	copy_from_user_ret(to, from, n, retval)
#define	clear_user(to, n)   __clear_user(to, n)

Enumerations
enum	{   BFIN_MEM_ACCESS_CORE = 0, BFIN_MEM_ACCESS_CORE_ONLY, BFIN_MEM_ACCESS_DMA, BFIN_MEM_ACCESS_IDMA,   BFIN_MEM_ACCESS_ITEST }

Functions
int	bfin_mem_access_type (unsigned long addr, unsigned long size)

Macro Definition Documentation

#define __copy_from_user	(		to,
			from,
			n
	)		copy_from_user(to, from, n)

Definition at line 183 of file uaccess.h.

#define __copy_from_user_inatomic   __copy_from_user

Definition at line 186 of file uaccess.h.

#define __copy_to_user	(		to,
			from,
			n
	)		copy_to_user(to, from, n)

Definition at line 184 of file uaccess.h.

#define __copy_to_user_inatomic   __copy_to_user

Definition at line 185 of file uaccess.h.

#define __get_user	(		x,
			p
	)		get_user(x,p)

Definition at line 171 of file uaccess.h.

#define __get_user_asm	(		x,
			ptr,
			bhw,
			option
	)

Value:

({                      \
    __asm__ __volatile__ (          \
        "%0 =" #bhw "[%1]" #option ";"  \
        : "=d" (x)          \
        : "a" (__ptr(ptr)));        \
})

Definition at line 175 of file uaccess.h.

#define __get_user_bad

(

void

)

(bad_user_access_length(), (-EFAULT))

Definition at line 173 of file uaccess.h.

#define __ptr

(

x

)

((unsigned long *)(x))

Definition at line 139 of file uaccess.h.

#define __put_user	(		x,
			p
	)		put_user(x,p)

Definition at line 122 of file uaccess.h.

#define __put_user_asm	(		x,
			p,
			bhw
	)

Value:

__asm__ (#bhw"[%1] = %0;\n\t"           \
         : /* no outputs */         \
         :"d" (x),"a" (__ptr(p)) : "memory")

Definition at line 141 of file uaccess.h.

#define __put_user_bad

(

void

)

Value:

(printk(KERN_INFO "put_user_bad %s:%d %s\n",\
                           __FILE__, __LINE__, __func__),\
                           bad_user_access_length(), (-EFAULT))

Definition at line 129 of file uaccess.h.

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

Definition at line 35 of file uaccess.h.

#define clear_user	(		to,
			n
	)		__clear_user(to, n)

Definition at line 267 of file uaccess.h.

#define copy_from_user_ret	(		to,
			from,
			n,
			retval
	)

Value:

({ if (copy_from_user(to,from,n))\
                                                   return retval; })

Definition at line 191 of file uaccess.h.

#define copy_to_user_ret	(		to,
			from,
			n,
			retval
	)

Value:

({ if (copy_to_user(to,from,n))\
                                 return retval; })

Definition at line 188 of file uaccess.h.

#define get_ds

(

void

)

(KERNEL_DS)

Definition at line 22 of file uaccess.h.

#define get_fs

(

void

)

(current_thread_info()->addr_limit)

Definition at line 23 of file uaccess.h.

#define get_user	(		x,
			ptr
	)

Value:

({                              \
    int _err = 0;                       \
    unsigned long _val = 0;                 \
    const typeof(*(ptr)) __user *_p = (ptr);        \
    const size_t ptr_size = sizeof(*(_p));          \
    if (likely(access_ok(VERIFY_READ, _p, ptr_size))) { \
        BUILD_BUG_ON(ptr_size >= 8);            \
        switch (ptr_size) {             \
        case 1:                     \
            __get_user_asm(_val, _p, B,(Z));    \
            break;                  \
        case 2:                     \
            __get_user_asm(_val, _p, W,(Z));    \
            break;                  \
        case 4:                     \
            __get_user_asm(_val, _p,  , );      \
            break;                  \
        }                       \
    } else                          \
        _err = -EFAULT;                 \
    x = (typeof(*(ptr)))_val;               \
    _err;                           \
})

Definition at line 146 of file uaccess.h.

#define put_user	(		x,
			p
	)

Definition at line 88 of file uaccess.h.

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

Definition at line 30 of file uaccess.h.

#define VERIFY_READ   0

Definition at line 32 of file uaccess.h.

#define VERIFY_WRITE   1

Definition at line 33 of file uaccess.h.

Enumeration Type Documentation

anonymous enum

Enumerator:

BFIN_MEM_ACCESS_CORE
BFIN_MEM_ACCESS_CORE_ONLY
BFIN_MEM_ACCESS_DMA
BFIN_MEM_ACCESS_IDMA
BFIN_MEM_ACCESS_ITEST

Definition at line 276 of file uaccess.h.

Function Documentation

int bfin_mem_access_type	(	unsigned long	addr,
		unsigned long	size
	)

bfin_mem_access_type() - what kind of memory access is required : the address to check : number of bytes needed

Returns

: <0 is error, >=0 is BFIN_MEM_ACCESS_xxx enum (see above)

Definition at line 391 of file process.c.