mirror of https://gitee.com/openkylin/linux.git
Blackfin arch: fixup get_user() macros
- to avoid uninitialized errors - make invalid sizes a build error Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
parent
9f20cf2527
commit
5ff294fa00
|
@ -149,54 +149,42 @@ static inline int bad_user_access_length(void)
|
|||
: /* no outputs */ \
|
||||
:"d" (x),"a" (__ptr(p)) : "memory")
|
||||
|
||||
#define get_user(x,p) \
|
||||
({ \
|
||||
int _err = 0; \
|
||||
typeof(*(p)) *_p = (p); \
|
||||
if (!access_ok(VERIFY_READ, _p, sizeof(*(_p)))) { \
|
||||
_err = -EFAULT; \
|
||||
} \
|
||||
else { \
|
||||
switch (sizeof(*(_p))) { \
|
||||
case 1: \
|
||||
__get_user_asm(x, _p, B,(Z)); \
|
||||
break; \
|
||||
case 2: \
|
||||
__get_user_asm(x, _p, W,(Z)); \
|
||||
break; \
|
||||
case 4: \
|
||||
__get_user_asm(x, _p, , ); \
|
||||
break; \
|
||||
case 8: { \
|
||||
unsigned long _xl, _xh; \
|
||||
__get_user_asm(_xl, ((unsigned long *)_p)+0, , ); \
|
||||
__get_user_asm(_xh, ((unsigned long *)_p)+1, , ); \
|
||||
((unsigned long *)&x)[0] = _xl; \
|
||||
((unsigned long *)&x)[1] = _xh; \
|
||||
} break; \
|
||||
default: \
|
||||
x = 0; \
|
||||
printk(KERN_INFO "get_user_bad: %s:%d %s\n", \
|
||||
__FILE__, __LINE__, __func__); \
|
||||
_err = __get_user_bad(); \
|
||||
break; \
|
||||
} \
|
||||
} \
|
||||
_err; \
|
||||
})
|
||||
#define get_user(x, ptr) \
|
||||
({ \
|
||||
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; \
|
||||
})
|
||||
|
||||
#define __get_user(x,p) get_user(x,p)
|
||||
|
||||
#define __get_user_bad() (bad_user_access_length(), (-EFAULT))
|
||||
|
||||
#define __get_user_asm(x,p,bhw,option) \
|
||||
{ \
|
||||
unsigned long _tmp; \
|
||||
__asm__ ("%0 =" #bhw "[%1]"#option";\n\t" \
|
||||
: "=d" (_tmp) \
|
||||
: "a" (__ptr(p))); \
|
||||
(x) = (__typeof__(*(p))) _tmp; \
|
||||
}
|
||||
#define __get_user_asm(x, ptr, bhw, option) \
|
||||
({ \
|
||||
__asm__ __volatile__ ( \
|
||||
"%0 =" #bhw "[%1]" #option ";" \
|
||||
: "=d" (x) \
|
||||
: "a" (__ptr(ptr))); \
|
||||
})
|
||||
|
||||
#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)
|
||||
|
|
Loading…
Reference in New Issue