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OpenCloudOS-Kernel
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microblaze: uaccess: Sync strlen, strnlen, copy_to/from_user 

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Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-03-22 18:49:45 +01:00
parent 94804a9b3d
commit 89ae9753ae
1 changed files with 32 additions and 56 deletions
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88
arch/microblaze/include/asm/uaccess.h
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@ -294,40 +294,6 @@ extern long __user_bad(void);
#define put_user(x, ptr) __put_user((x), (ptr))
static inline 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)
static inline long __strncpy_from_user(char *dst,
const char __user *src, long count)
{
long res;
__do_strncpy_from_user(dst, src, count, res);
return res;
}
static inline 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;
}
extern long strncpy_from_user(char *dst, const char *src, long count);
extern long strnlen_user(const char *src, long count);
#else /* CONFIG_MMU */
#define put_user(x, ptr) \
@ -335,26 +301,9 @@ extern long strnlen_user(const char *src, long count);
access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
? __put_user((x), (ptr)) : -EFAULT; \
})
extern int __strncpy_user(char *to, const char __user *from, int len);
#define __strncpy_from_user __strncpy_user
static inline long
strncpy_from_user(char *dst, const char __user *src, long count)
{
if (!access_ok(VERIFY_READ, src, 1))
return -EFAULT;
return __strncpy_from_user(dst, src, count);
}
extern int __strnlen_user(const char __user *sstr, int len);
#define strnlen_user(str, len) \
(access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0)
#endif /* CONFIG_MMU */
/* copy_to_from_user */
#define __copy_from_user(to, from, n) \
__copy_tofrom_user((__force void __user *)(to), \
(void __user *)(from), (n))
@ -367,8 +316,7 @@ static inline long copy_from_user(void *to,
might_sleep();
if (access_ok(VERIFY_READ, from, n))
return __copy_from_user(to, from, n);
else
return n;
return n;
}
#define __copy_to_user(to, from, n) \
@ -382,8 +330,36 @@ static inline long copy_to_user(void __user *to,
might_sleep();
if (access_ok(VERIFY_WRITE, to, n))
return __copy_to_user(to, from, n);
else
return n;
return n;
}
/*
* Copy a null terminated string from userspace.
*/
extern int __strncpy_user(char *to, const char __user *from, int len);
#define __strncpy_from_user __strncpy_user
static inline long
strncpy_from_user(char *dst, const char __user *src, long count)
{
if (!access_ok(VERIFY_READ, src, 1))
return -EFAULT;
return __strncpy_from_user(dst, src, count);
}
/*
* Return the size of a string (including the ending 0)
*
* Return 0 on exception, a value greater than N if too long
*/
extern int __strnlen_user(const char __user *sstr, int len);
static inline long strnlen_user(const char __user *src, long n)
{
if (!access_ok(VERIFY_READ, src, 1))
return 0;
return __strnlen_user(src, n);
}
#endif /* __ASSEMBLY__ */