x86: merge __get_user_asm and its users.
Move __get_user_asm and __get_user_size and __get_user_nocheck to uaccess.h. This requires us to define a macro at __get_user_size for the 64-bit access case. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber Costa
Ingo Molnar
Родитель
6fd4725d75
Коммит
3f16822116
|
|
@ -233,6 +233,47 @@ do { \
|
|||
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_X86_32
|
||||
#define __get_user_asm_u64(x, ptr, retval, errret) (x) = __get_user_bad()
|
||||
#else
|
||||
#define __get_user_asm_u64(x, ptr, retval, errret) \
|
||||
__get_user_asm(x, ptr, retval, "q", "", "=r", errret)
|
||||
#endif
|
||||
|
||||
#define __get_user_size(x, ptr, size, retval, errret) \
|
||||
do { \
|
||||
retval = 0; \
|
||||
__chk_user_ptr(ptr); \
|
||||
switch (size) { \
|
||||
case 1: \
|
||||
__get_user_asm(x, ptr, retval, "b", "b", "=q", errret); \
|
||||
break; \
|
||||
case 2: \
|
||||
__get_user_asm(x, ptr, retval, "w", "w", "=r", errret); \
|
||||
break; \
|
||||
case 4: \
|
||||
__get_user_asm(x, ptr, retval, "l", "k", "=r", errret); \
|
||||
break; \
|
||||
case 8: \
|
||||
__get_user_asm_u64(x, ptr, retval, errret); \
|
||||
break; \
|
||||
default: \
|
||||
(x) = __get_user_bad(); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
#define __get_user_asm(x, addr, err, itype, rtype, ltype, errret) \
|
||||
asm volatile("1: mov"itype" %2,%"rtype"1\n" \
|
||||
"2:\n" \
|
||||
".section .fixup,\"ax\"\n" \
|
||||
"3: mov %3,%0\n" \
|
||||
" xor"itype" %"rtype"1,%"rtype"1\n" \
|
||||
" jmp 2b\n" \
|
||||
".previous\n" \
|
||||
_ASM_EXTABLE(1b, 3b) \
|
||||
: "=r" (err), ltype(x) \
|
||||
: "m" (__m(addr)), "i" (errret), "0" (err))
|
||||
|
||||
#define __put_user_nocheck(x, ptr, size) \
|
||||
({ \
|
||||
long __pu_err; \
|
||||
|
|
@ -240,7 +281,14 @@ do { \
|
|||
__pu_err; \
|
||||
})
|
||||
|
||||
|
||||
#define __get_user_nocheck(x, ptr, size) \
|
||||
({ \
|
||||
long __gu_err; \
|
||||
unsigned long __gu_val; \
|
||||
__get_user_size(__gu_val, (ptr), (size), __gu_err, -EFAULT); \
|
||||
(x) = (__force __typeof__(*(ptr)))__gu_val; \
|
||||
__gu_err; \
|
||||
})
|
||||
|
||||
/* FIXME: this hack is definitely wrong -AK */
|
||||
struct __large_struct { unsigned long buf[100]; };
|
||||
|
|
|
|||
|
|
@ -145,47 +145,6 @@ extern void __put_user_8(void);
|
|||
#define __put_user(x, ptr) \
|
||||
__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
|
||||
|
||||
#define __get_user_nocheck(x, ptr, size) \
|
||||
({ \
|
||||
long __gu_err; \
|
||||
unsigned long __gu_val; \
|
||||
__get_user_size(__gu_val, (ptr), (size), __gu_err, -EFAULT); \
|
||||
(x) = (__typeof__(*(ptr)))__gu_val; \
|
||||
__gu_err; \
|
||||
})
|
||||
|
||||
#define __get_user_size(x, ptr, size, retval, errret) \
|
||||
do { \
|
||||
retval = 0; \
|
||||
__chk_user_ptr(ptr); \
|
||||
switch (size) { \
|
||||
case 1: \
|
||||
__get_user_asm(x, ptr, retval, "b", "b", "=q", errret); \
|
||||
break; \
|
||||
case 2: \
|
||||
__get_user_asm(x, ptr, retval, "w", "w", "=r", errret); \
|
||||
break; \
|
||||
case 4: \
|
||||
__get_user_asm(x, ptr, retval, "l", "", "=r", errret); \
|
||||
break; \
|
||||
default: \
|
||||
(x) = __get_user_bad(); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
#define __get_user_asm(x, addr, err, itype, rtype, ltype, errret) \
|
||||
asm volatile("1: mov"itype" %2,%"rtype"1\n" \
|
||||
"2:\n" \
|
||||
".section .fixup,\"ax\"\n" \
|
||||
"3: movl %3,%0\n" \
|
||||
" xor"itype" %"rtype"1,%"rtype"1\n" \
|
||||
" jmp 2b\n" \
|
||||
".previous\n" \
|
||||
_ASM_EXTABLE(1b, 3b) \
|
||||
: "=r" (err), ltype (x) \
|
||||
: "m" (__m(addr)), "i" (errret), "0" (err))
|
||||
|
||||
|
||||
unsigned long __must_check __copy_to_user_ll
|
||||
(void __user *to, const void *from, unsigned long n);
|
||||
unsigned long __must_check __copy_from_user_ll
|
||||
|
|
|
|||
|
|
@ -57,49 +57,6 @@ extern void __put_user_bad(void);
|
|||
__pu_err; \
|
||||
})
|
||||
|
||||
#define __get_user_nocheck(x, ptr, size) \
|
||||
({ \
|
||||
int __gu_err; \
|
||||
unsigned long __gu_val; \
|
||||
__get_user_size(__gu_val, (ptr), (size), __gu_err, -EFAULT);\
|
||||
(x) = (__force typeof(*(ptr)))__gu_val; \
|
||||
__gu_err; \
|
||||
})
|
||||
|
||||
#define __get_user_size(x, ptr, size, retval, errret) \
|
||||
do { \
|
||||
retval = 0; \
|
||||
__chk_user_ptr(ptr); \
|
||||
switch (size) { \
|
||||
case 1: \
|
||||
__get_user_asm(x, ptr, retval, "b", "b", "=q", errret);\
|
||||
break; \
|
||||
case 2: \
|
||||
__get_user_asm(x, ptr, retval, "w", "w", "=r", errret);\
|
||||
break; \
|
||||
case 4: \
|
||||
__get_user_asm(x, ptr, retval, "l", "k", "=r", errret);\
|
||||
break; \
|
||||
case 8: \
|
||||
__get_user_asm(x, ptr, retval, "q", "", "=r", errret); \
|
||||
break; \
|
||||
default: \
|
||||
(x) = __get_user_bad(); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
#define __get_user_asm(x, addr, err, itype, rtype, ltype, errno) \
|
||||
asm volatile("1: mov"itype" %2,%"rtype"1\n" \
|
||||
"2:\n" \
|
||||
".section .fixup, \"ax\"\n" \
|
||||
"3: mov %3,%0\n" \
|
||||
" xor"itype" %"rtype"1,%"rtype"1\n" \
|
||||
" jmp 2b\n" \
|
||||
".previous\n" \
|
||||
_ASM_EXTABLE(1b, 3b) \
|
||||
: "=r" (err), ltype (x) \
|
||||
: "m" (__m(addr)), "i"(errno), "0"(err))
|
||||
|
||||
/*
|
||||
* Copy To/From Userspace
|
||||
*/
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче