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0d6de953
编写于
5月 26, 2009
作者:
M
Michal Simek
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
microblaze_mmu_v2: uaccess MMU update
Signed-off-by:
N
Michal Simek
<
monstr@monstr.eu
>
上级
7db29dde
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
381 addition
and
52 deletion
+381
-52
arch/microblaze/include/asm/uaccess.h
arch/microblaze/include/asm/uaccess.h
+246
-52
arch/microblaze/lib/uaccess_old.S
arch/microblaze/lib/uaccess_old.S
+135
-0
未找到文件。
arch/microblaze/include/asm/uaccess.h
浏览文件 @
0d6de953
/*
/*
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2008-2009 PetaLogix
* Copyright (C) 2006 Atmark Techno, Inc.
* Copyright (C) 2006 Atmark Techno, Inc.
*
*
* This file is subject to the terms and conditions of the GNU General Public
* This file is subject to the terms and conditions of the GNU General Public
...
@@ -26,6 +28,10 @@
...
@@ -26,6 +28,10 @@
#define VERIFY_READ 0
#define VERIFY_READ 0
#define VERIFY_WRITE 1
#define VERIFY_WRITE 1
#define __clear_user(addr, n) (memset((void *)(addr), 0, (n)), 0)
#ifndef CONFIG_MMU
extern
int
___range_ok
(
unsigned
long
addr
,
unsigned
long
size
);
extern
int
___range_ok
(
unsigned
long
addr
,
unsigned
long
size
);
#define __range_ok(addr, size) \
#define __range_ok(addr, size) \
...
@@ -38,63 +44,64 @@ extern int ___range_ok(unsigned long addr, unsigned long size);
...
@@ -38,63 +44,64 @@ extern int ___range_ok(unsigned long addr, unsigned long size);
extern
int
bad_user_access_length
(
void
);
extern
int
bad_user_access_length
(
void
);
/* FIXME this is function for optimalization -> memcpy */
/* FIXME this is function for optimalization -> memcpy */
#define __get_user(var, ptr)
\
#define __get_user(var, ptr) \
({ \
({ \
int __gu_err = 0; \
int __gu_err = 0; \
switch (sizeof(*(ptr))) { \
switch (sizeof(*(ptr))) { \
case 1: \
case 1: \
case 2: \
case 2: \
case 4: \
case 4: \
(var) = *(ptr); \
(var) = *(ptr); \
break; \
break; \
case 8: \
case 8: \
memcpy((void *) &(var), (ptr), 8); \
memcpy((void *) &(var), (ptr), 8); \
break; \
break; \
default: \
default: \
(var) = 0; \
(var) = 0; \
__gu_err = __get_user_bad(); \
__gu_err = __get_user_bad(); \
break; \
break; \
} \
} \
__gu_err; \
__gu_err; \
})
})
#define __get_user_bad() (bad_user_access_length(), (-EFAULT))
#define __get_user_bad() (bad_user_access_length(), (-EFAULT))
/* FIXME is not there defined __pu_val */
#define __put_user(var, ptr) \
#define __put_user(var, ptr) \
({
\
({
\
int __pu_err = 0;
\
int __pu_err = 0;
\
switch (sizeof(*(ptr))) {
\
switch (sizeof(*(ptr))) {
\
case 1:
\
case 1:
\
case 2:
\
case 2:
\
case 4:
\
case 4:
\
*(ptr) = (var);
\
*(ptr) = (var);
\
break;
\
break;
\
case 8: {
\
case 8: {
\
typeof(*(ptr)) __pu_val = var
; \
typeof(*(ptr)) __pu_val = (var)
; \
memcpy(ptr, &__pu_val, sizeof(__pu_val));
\
memcpy(ptr, &__pu_val, sizeof(__pu_val));
\
}
\
}
\
break;
\
break;
\
default:
\
default:
\
__pu_err = __put_user_bad();
\
__pu_err = __put_user_bad();
\
break;
\
break;
\
} \
} \
__pu_err; \
__pu_err; \
})
})
#define __put_user_bad() (bad_user_access_length(), (-EFAULT))
#define __put_user_bad() (bad_user_access_length(), (-EFAULT))
#define put_user(x, ptr) __put_user(x, ptr)
#define put_user(x, ptr) __put_user((x), (ptr))
#define get_user(x, ptr) __get_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_to_user(to, from, n) (memcpy((to), (from), (n)), 0)
#define __copy_from_user(to, from, n) (copy_from_user(to, from, n))
#define copy_from_user(to, from, n) (memcpy((to), (from), (n)), 0)
#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)
#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)))
static
inline
unsigned
long
clear_user
(
void
*
addr
,
unsigned
long
size
)
static
inline
unsigned
long
clear_user
(
void
*
addr
,
unsigned
long
size
)
{
{
...
@@ -103,13 +110,200 @@ static inline unsigned long clear_user(void *addr, unsigned long size)
...
@@ -103,13 +110,200 @@ static inline unsigned long clear_user(void *addr, unsigned long size)
return
size
;
return
size
;
}
}
/* Returns 0 if exception not found and fixup otherwise. */
/* Returns 0 if exception not found and fixup otherwise.
*/
extern
unsigned
long
search_exception_table
(
unsigned
long
);
extern
unsigned
long
search_exception_table
(
unsigned
long
);
extern
long
strncpy_from_user
(
char
*
dst
,
const
char
*
src
,
long
count
);
extern
long
strnlen_user
(
const
char
*
src
,
long
count
);
#else
/* CONFIG_MMU */
/*
* Address is valid if:
* - "addr", "addr + size" and "size" are all below the limit
*/
#define access_ok(type, addr, size) \
(get_fs().seg > (((unsigned long)(addr)) | \
(size) | ((unsigned long)(addr) + (size))))
/* || printk("access_ok failed for %s at 0x%08lx (size %d), seg 0x%08x\n",
type?"WRITE":"READ",addr,size,get_fs().seg)) */
/*
* All the __XXX versions macros/functions below do not perform
* access checking. It is assumed that the necessary checks have been
* already performed before the finction (macro) is called.
*/
#define get_user(x, ptr) \
({ \
access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \
? __get_user((x), (ptr)) : -EFAULT; \
})
#define put_user(x, ptr) \
({ \
access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
? __put_user((x), (ptr)) : -EFAULT; \
})
#define __get_user(x, ptr) \
({ \
unsigned long __gu_val; \
/*unsigned long __gu_ptr = (unsigned long)(ptr);*/
\
long __gu_err; \
switch (sizeof(*(ptr))) { \
case 1: \
__get_user_asm("lbu", (ptr), __gu_val, __gu_err); \
break; \
case 2: \
__get_user_asm("lhu", (ptr), __gu_val, __gu_err); \
break; \
case 4: \
__get_user_asm("lw", (ptr), __gu_val, __gu_err); \
break; \
default: \
__gu_val = 0; __gu_err = -EINVAL; \
} \
x = (__typeof__(*(ptr))) __gu_val; \
__gu_err; \
})
#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ ( \
"1:" insn " %1, %2, r0; \
addk %0, r0, r0; \
2: \
.section .fixup,\"ax\"; \
3: brid 2b; \
addik %0, r0, %3; \
.previous; \
.section __ex_table,\"a\"; \
.word 1b,3b; \
.previous;" \
: "=r"(__gu_err), "=r"(__gu_val) \
: "r"(__gu_ptr), "i"(-EFAULT) \
); \
})
#define __put_user(x, ptr) \
({ \
__typeof__(*(ptr)) __gu_val = x; \
long __gu_err = 0; \
switch (sizeof(__gu_val)) { \
case 1: \
__put_user_asm("sb", (ptr), __gu_val, __gu_err); \
break; \
case 2: \
__put_user_asm("sh", (ptr), __gu_val, __gu_err); \
break; \
case 4: \
__put_user_asm("sw", (ptr), __gu_val, __gu_err); \
break; \
case 8: \
__put_user_asm_8((ptr), __gu_val, __gu_err); \
break; \
default: \
__gu_err = -EINVAL; \
} \
__gu_err; \
})
#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ (" lwi %0, %1, 0; \
1: swi %0, %2, 0; \
lwi %0, %1, 4; \
2: swi %0, %2, 4; \
addk %0,r0,r0; \
3: \
.section .fixup,\"ax\"; \
4: brid 3b; \
addik %0, r0, %3; \
.previous; \
.section __ex_table,\"a\"; \
.word 1b,4b,2b,4b; \
.previous;" \
: "=&r"(__gu_err) \
: "r"(&__gu_val), \
"r"(__gu_ptr), "i"(-EFAULT) \
); \
})
#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
({ \
__asm__ __volatile__ ( \
"1:" insn " %1, %2, r0; \
addk %0, r0, r0; \
2: \
.section .fixup,\"ax\"; \
3: brid 2b; \
addik %0, r0, %3; \
.previous; \
.section __ex_table,\"a\"; \
.word 1b,3b; \
.previous;" \
: "=r"(__gu_err) \
: "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
); \
})
/*
* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail.
*/
static
inline
int
clear_user
(
char
*
to
,
int
size
)
{
if
(
size
&&
access_ok
(
VERIFY_WRITE
,
to
,
size
))
{
__asm__
__volatile__
(
" \
1: \
sb r0, %2, r0; \
addik %0, %0, -1; \
bneid %0, 1b; \
addik %2, %2, 1; \
2: \
.section __ex_table,
\"
a
\"
; \
.word 1b,2b; \
.section .text;"
\
:
"=r"
(
size
)
\
:
"0"
(
size
),
"r"
(
to
)
);
}
return
size
;
}
extern
unsigned
long
__copy_tofrom_user
(
void
__user
*
to
,
const
void
__user
*
from
,
unsigned
long
size
);
#define copy_to_user(to, from, n) \
(access_ok(VERIFY_WRITE, (to), (n)) ? \
__copy_tofrom_user((void __user *)(to), \
(__force const void __user *)(from), (n)) \
: -EFAULT)
#define __copy_to_user(to, from, n) copy_to_user((to), (from), (n))
#define __copy_to_user_inatomic(to, from, n) copy_to_user((to), (from), (n))
#define copy_from_user(to, from, n) \
(access_ok(VERIFY_READ, (from), (n)) ? \
__copy_tofrom_user((__force void __user *)(to), \
(void __user *)(from), (n)) \
: -EFAULT)
#define __copy_from_user(to, from, n) copy_from_user((to), (from), (n))
#define __copy_from_user_inatomic(to, from, n) \
copy_from_user((to), (from), (n))
extern
int
__strncpy_user
(
char
*
to
,
const
char
__user
*
from
,
int
len
);
extern
int
__strnlen_user
(
const
char
__user
*
sstr
,
int
len
);
#define strncpy_from_user(to, from, len) \
(access_ok(VERIFY_READ, from, 1) ? \
__strncpy_user(to, from, len) : -EFAULT)
#define strnlen_user(str, len) \
(access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0)
extern
long
strncpy_from_user
(
char
*
dst
,
const
char
__user
*
src
,
long
count
);
#endif
/* CONFIG_MMU */
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
* The exception table consists of pairs of addresses: the first is the
...
...
arch/microblaze/lib/uaccess_old.S
0 → 100644
浏览文件 @
0d6de953
/*
*
Copyright
(
C
)
2009
Michal
Simek
<
monstr
@
monstr
.
eu
>
*
Copyright
(
C
)
2009
PetaLogix
*
Copyright
(
C
)
2007
LynuxWorks
,
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/errno.h>
#include <linux/linkage.h>
/*
*
int
__strncpy_user
(
char
*
to
,
char
*
from
,
int
len
)
;
*
*
Returns
:
*
-
EFAULT
for
an
exception
*
len
if
we
hit
the
buffer
limit
*
bytes
copied
*/
.
text
.
globl
__strncpy_user
;
.
align
4
;
__strncpy_user
:
/
*
*
r5
-
to
*
r6
-
from
*
r7
-
len
*
r3
-
temp
count
*
r4
-
temp
val
*/
addik
r3
,
r7
,
0
/*
temp_count
=
len
*/
beqi
r3
,
3
f
1
:
lbu
r4
,
r6
,
r0
sb
r4
,
r5
,
r0
addik
r3
,
r3
,-
1
beqi
r3
,
2
f
/*
break
on
len
*/
addik
r5
,
r5
,
1
bneid
r4
,
1
b
addik
r6
,
r6
,
1
/*
delay
slot
*/
addik
r3
,
r3
,
1
/*
undo
"temp_count--"
*/
2
:
rsubk
r3
,
r3
,
r7
/*
temp_count
=
len
-
temp_count
*/
3
:
rtsd
r15
,
8
nop
.
section
.
fixup
,
"ax"
.
align
2
4
:
brid
3
b
addik
r3
,
r0
,
-
EFAULT
.
section
__ex_table
,
"a"
.
word
1
b
,
4
b
/*
*
int
__strnlen_user
(
char
__user
*
str
,
int
maxlen
)
;
*
*
Returns
:
*
0
on
error
*
maxlen
+
1
if
no
NUL
byte
found
within
maxlen
bytes
*
size
of
the
string
(
including
NUL
byte
)
*/
.
text
.
globl
__strnlen_user
;
.
align
4
;
__strnlen_user
:
addik
r3
,
r6
,
0
beqi
r3
,
3
f
1
:
lbu
r4
,
r5
,
r0
beqid
r4
,
2
f
/*
break
on
NUL
*/
addik
r3
,
r3
,-
1
/*
delay
slot
*/
bneid
r3
,
1
b
addik
r5
,
r5
,
1
/*
delay
slot
*/
addik
r3
,
r3
,-
1
/*
for
break
on
len
*/
2
:
rsubk
r3
,
r3
,
r6
3
:
rtsd
r15
,
8
nop
.
section
.
fixup
,
"ax"
4
:
brid
3
b
addk
r3
,
r0
,
r0
.
section
__ex_table
,
"a"
.
word
1
b
,
4
b
/*
*
int
__copy_tofrom_user
(
char
*
to
,
char
*
from
,
int
len
)
*
Return
:
*
0
on
success
*
number
of
not
copied
bytes
on
error
*/
.
text
.
globl
__copy_tofrom_user
;
.
align
4
;
__copy_tofrom_user
:
/
*
*
r5
-
to
*
r6
-
from
*
r7
,
r3
-
count
*
r4
-
tempval
*/
addik
r3
,
r7
,
0
beqi
r3
,
3
f
1
:
lbu
r4
,
r6
,
r0
addik
r6
,
r6
,
1
2
:
sb
r4
,
r5
,
r0
addik
r3
,
r3
,-
1
bneid
r3
,
1
b
addik
r5
,
r5
,
1
/*
delay
slot
*/
3
:
rtsd
r15
,
8
nop
.
section
__ex_table
,
"a"
.
word
1
b
,
3
b
,
2
b
,
3
b
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