mirror of https://gitee.com/openkylin/linux.git
microblaze_v8: uaccess files
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
parent
89272a51b3
commit
2660663ff2
|
@ -0,0 +1,134 @@
|
|||
/*
|
||||
* Copyright (C) 2006 Atmark Techno, Inc.
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file "COPYING" in the main directory of this archive
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#ifndef _ASM_MICROBLAZE_UACCESS_H
|
||||
#define _ASM_MICROBLAZE_UACCESS_H
|
||||
|
||||
#ifdef __KERNEL__
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/sched.h> /* RLIMIT_FSIZE */
|
||||
#include <linux/mm.h>
|
||||
|
||||
#include <asm/mmu.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/segment.h>
|
||||
#include <linux/string.h>
|
||||
|
||||
#define VERIFY_READ 0
|
||||
#define VERIFY_WRITE 1
|
||||
|
||||
extern int ___range_ok(unsigned long addr, unsigned long size);
|
||||
|
||||
#define __range_ok(addr, size) \
|
||||
___range_ok((unsigned long)(addr), (unsigned long)(size))
|
||||
|
||||
#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0)
|
||||
#define __access_ok(add, size) (__range_ok((addr), (size)) == 0)
|
||||
|
||||
extern inline int bad_user_access_length(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
/* FIXME this is function for optimalization -> memcpy */
|
||||
#define __get_user(var, ptr) \
|
||||
({ \
|
||||
int __gu_err = 0; \
|
||||
switch (sizeof(*(ptr))) { \
|
||||
case 1: \
|
||||
case 2: \
|
||||
case 4: \
|
||||
(var) = *(ptr); \
|
||||
break; \
|
||||
case 8: \
|
||||
memcpy((void *) &(var), (ptr), 8); \
|
||||
break; \
|
||||
default: \
|
||||
(var) = 0; \
|
||||
__gu_err = __get_user_bad(); \
|
||||
break; \
|
||||
} \
|
||||
__gu_err; \
|
||||
})
|
||||
|
||||
#define __get_user_bad() (bad_user_access_length(), (-EFAULT))
|
||||
|
||||
#define __put_user(var, ptr) \
|
||||
({ \
|
||||
int __pu_err = 0; \
|
||||
switch (sizeof(*(ptr))) { \
|
||||
case 1: \
|
||||
case 2: \
|
||||
case 4: \
|
||||
*(ptr) = (var); \
|
||||
break; \
|
||||
case 8: { \
|
||||
typeof(*(ptr)) __pu_val = var; \
|
||||
memcpy(ptr, &__pu_val, sizeof(__pu_val));\
|
||||
} \
|
||||
break; \
|
||||
default: \
|
||||
__pu_err = __put_user_bad(); \
|
||||
break; \
|
||||
} \
|
||||
__pu_err; \
|
||||
})
|
||||
|
||||
#define __put_user_bad() (bad_user_access_length(), (-EFAULT))
|
||||
|
||||
#define put_user(x, ptr) __put_user(x, ptr)
|
||||
#define get_user(x, ptr) __get_user(x, ptr)
|
||||
|
||||
#define copy_to_user(to, from, n) (memcpy(to, from, n), 0)
|
||||
#define copy_from_user(to, from, n) (memcpy(to, from, n), 0)
|
||||
|
||||
#define __copy_to_user(to, from, n) (copy_to_user(to, from, n))
|
||||
#define __copy_from_user(to, from, n) (copy_from_user(to, from, n))
|
||||
#define __copy_to_user_inatomic(to, from, n) (__copy_to_user(to, from, n))
|
||||
#define __copy_from_user_inatomic(to, from, n) (__copy_from_user(to, from, n))
|
||||
|
||||
#define __clear_user(addr, n) (memset((void *)addr, 0, n), 0)
|
||||
|
||||
static inline unsigned long clear_user(void *addr, unsigned long size)
|
||||
{
|
||||
if (access_ok(VERIFY_WRITE, addr, size))
|
||||
size = __clear_user(addr, size);
|
||||
return size;
|
||||
}
|
||||
|
||||
/* Returns 0 if exception not found and fixup otherwise. */
|
||||
extern unsigned long search_exception_table(unsigned long);
|
||||
|
||||
|
||||
extern long strncpy_from_user(char *dst, const char __user *src, long count);
|
||||
extern long strnlen_user(const char __user *src, long count);
|
||||
extern long __strncpy_from_user(char *dst, const char __user *src, long count);
|
||||
|
||||
/*
|
||||
* The exception table consists of pairs of addresses: the first is the
|
||||
* address of an instruction that is allowed to fault, and the second is
|
||||
* the address at which the program should continue. No registers are
|
||||
* modified, so it is entirely up to the continuation code to figure out
|
||||
* what to do.
|
||||
*
|
||||
* All the routines below use bits of fixup code that are out of line
|
||||
* with the main instruction path. This means when everything is well,
|
||||
* we don't even have to jump over them. Further, they do not intrude
|
||||
* on our cache or tlb entries.
|
||||
*/
|
||||
struct exception_table_entry {
|
||||
unsigned long insn, fixup;
|
||||
};
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#endif /* _ASM_MICROBLAZE_UACCESS_H */
|
|
@ -0,0 +1,41 @@
|
|||
/*
|
||||
* Copyright (C) 2006 Atmark Techno, Inc.
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file "COPYING" in the main directory of this archive
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#include <linux/string.h>
|
||||
#include <asm/uaccess.h>
|
||||
|
||||
#include <asm/bug.h>
|
||||
|
||||
long strnlen_user(const char __user *src, long count)
|
||||
{
|
||||
return strlen(src) + 1;
|
||||
}
|
||||
|
||||
#define __do_strncpy_from_user(dst, src, count, res) \
|
||||
do { \
|
||||
char *tmp; \
|
||||
strncpy(dst, src, count); \
|
||||
for (tmp = dst; *tmp && count > 0; tmp++, count--) \
|
||||
; \
|
||||
res = (tmp - dst); \
|
||||
} while (0)
|
||||
|
||||
long __strncpy_from_user(char *dst, const char __user *src, long count)
|
||||
{
|
||||
long res;
|
||||
__do_strncpy_from_user(dst, src, count, res);
|
||||
return res;
|
||||
}
|
||||
|
||||
long strncpy_from_user(char *dst, const char __user *src, long count)
|
||||
{
|
||||
long res = -EFAULT;
|
||||
if (access_ok(VERIFY_READ, src, 1))
|
||||
__do_strncpy_from_user(dst, src, count, res);
|
||||
return res;
|
||||
}
|
Loading…
Reference in New Issue