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92430dab
K
Kernel
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92430dab
编写于
3月 21, 2017
作者:
A
Al Viro
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
arm64: switch to RAW_COPY_USER
Signed-off-by:
N
Al Viro
<
viro@zeniv.linux.org.uk
>
上级
46583939
变更
4
隐藏空白更改
内联
并排
Showing
4 changed file
with
9 addition
and
53 deletion
+9
-53
arch/arm64/Kconfig
arch/arm64/Kconfig
+1
-0
arch/arm64/include/asm/uaccess.h
arch/arm64/include/asm/uaccess.h
+5
-50
arch/arm64/kernel/arm64ksyms.c
arch/arm64/kernel/arm64ksyms.c
+1
-1
arch/arm64/lib/copy_in_user.S
arch/arm64/lib/copy_in_user.S
+2
-2
未找到文件。
arch/arm64/Kconfig
浏览文件 @
92430dab
...
...
@@ -115,6 +115,7 @@ config ARM64
select SPARSE_IRQ
select SYSCTL_EXCEPTION_TRACE
select THREAD_INFO_IN_TASK
select ARCH_HAS_RAW_COPY_USER
help
ARM 64-bit (AArch64) Linux support.
...
...
arch/arm64/include/asm/uaccess.h
浏览文件 @
92430dab
...
...
@@ -331,58 +331,13 @@ do { \
})
extern
unsigned
long
__must_check
__arch_copy_from_user
(
void
*
to
,
const
void
__user
*
from
,
unsigned
long
n
);
#define raw_copy_from_user __arch_copy_from_user
extern
unsigned
long
__must_check
__arch_copy_to_user
(
void
__user
*
to
,
const
void
*
from
,
unsigned
long
n
);
extern
unsigned
long
__must_check
__copy_in_user
(
void
__user
*
to
,
const
void
__user
*
from
,
unsigned
long
n
);
#define raw_copy_to_user __arch_copy_to_user
extern
unsigned
long
__must_check
raw_copy_in_user
(
void
__user
*
to
,
const
void
__user
*
from
,
unsigned
long
n
);
extern
unsigned
long
__must_check
__clear_user
(
void
__user
*
addr
,
unsigned
long
n
);
static
inline
unsigned
long
__must_check
__copy_from_user
(
void
*
to
,
const
void
__user
*
from
,
unsigned
long
n
)
{
kasan_check_write
(
to
,
n
);
check_object_size
(
to
,
n
,
false
);
return
__arch_copy_from_user
(
to
,
from
,
n
);
}
static
inline
unsigned
long
__must_check
__copy_to_user
(
void
__user
*
to
,
const
void
*
from
,
unsigned
long
n
)
{
kasan_check_read
(
from
,
n
);
check_object_size
(
from
,
n
,
true
);
return
__arch_copy_to_user
(
to
,
from
,
n
);
}
static
inline
unsigned
long
__must_check
copy_from_user
(
void
*
to
,
const
void
__user
*
from
,
unsigned
long
n
)
{
unsigned
long
res
=
n
;
kasan_check_write
(
to
,
n
);
check_object_size
(
to
,
n
,
false
);
if
(
access_ok
(
VERIFY_READ
,
from
,
n
))
{
res
=
__arch_copy_from_user
(
to
,
from
,
n
);
}
if
(
unlikely
(
res
))
memset
(
to
+
(
n
-
res
),
0
,
res
);
return
res
;
}
static
inline
unsigned
long
__must_check
copy_to_user
(
void
__user
*
to
,
const
void
*
from
,
unsigned
long
n
)
{
kasan_check_read
(
from
,
n
);
check_object_size
(
from
,
n
,
true
);
if
(
access_ok
(
VERIFY_WRITE
,
to
,
n
))
{
n
=
__arch_copy_to_user
(
to
,
from
,
n
);
}
return
n
;
}
static
inline
unsigned
long
__must_check
copy_in_user
(
void
__user
*
to
,
const
void
__user
*
from
,
unsigned
long
n
)
{
if
(
access_ok
(
VERIFY_READ
,
from
,
n
)
&&
access_ok
(
VERIFY_WRITE
,
to
,
n
))
n
=
__copy_in_user
(
to
,
from
,
n
);
return
n
;
}
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
#define INLINE_COPY_TO_USER
#define INLINE_COPY_FROM_USER
static
inline
unsigned
long
__must_check
clear_user
(
void
__user
*
to
,
unsigned
long
n
)
{
...
...
arch/arm64/kernel/arm64ksyms.c
浏览文件 @
92430dab
...
...
@@ -38,7 +38,7 @@ EXPORT_SYMBOL(clear_page);
EXPORT_SYMBOL
(
__arch_copy_from_user
);
EXPORT_SYMBOL
(
__arch_copy_to_user
);
EXPORT_SYMBOL
(
__clear_user
);
EXPORT_SYMBOL
(
_
_copy_in_user
);
EXPORT_SYMBOL
(
raw
_copy_in_user
);
/* physical memory */
EXPORT_SYMBOL
(
memstart_addr
);
...
...
arch/arm64/lib/copy_in_user.S
浏览文件 @
92430dab
...
...
@@ -64,14 +64,14 @@
.
endm
end
.
req
x5
ENTRY
(
_
_copy_in_user
)
ENTRY
(
raw
_copy_in_user
)
uaccess_enable_not_uao
x3
,
x4
add
end
,
x0
,
x2
#include "copy_template.S"
uaccess_disable_not_uao
x3
mov
x0
,
#
0
ret
ENDPROC
(
_
_copy_in_user
)
ENDPROC
(
raw
_copy_in_user
)
.
section
.
fixup
,
"ax"
.
align
2
...
...
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