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9b01bd9e
编写于
11月 10, 2007
作者:
P
Paul Mundt
浏览文件
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下载
电子邮件补丁
差异文件
sh: Split out uaccess.h in to _32 and _64 variants.
Signed-off-by:
N
Paul Mundt
<
lethal@linux-sh.org
>
上级
c0acca67
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
578 addition
and
561 deletion
+578
-561
include/asm-sh/uaccess.h
include/asm-sh/uaccess.h
+3
-561
include/asm-sh/uaccess_32.h
include/asm-sh/uaccess_32.h
+575
-0
include/asm-sh/uaccess_64.h
include/asm-sh/uaccess_64.h
+0
-0
未找到文件。
include/asm-sh/uaccess.h
浏览文件 @
9b01bd9e
/* $Id: uaccess.h,v 1.11 2003/10/13 07:21:20 lethal Exp $
*
* User space memory access functions
*
* Copyright (C) 1999, 2002 Niibe Yutaka
* Copyright (C) 2003 Paul Mundt
*
* Based on:
* MIPS implementation version 1.15 by
* Copyright (C) 1996, 1997, 1998 by Ralf Baechle
* and i386 version.
*/
#ifndef __ASM_SH_UACCESS_H
#define __ASM_SH_UACCESS_H
#include <linux/errno.h>
#include <linux/sched.h>
#define VERIFY_READ 0
#define VERIFY_WRITE 1
/*
* The fs value determines whether argument validity checking should be
* performed or not. If get_fs() == USER_DS, checking is performed, with
* get_fs() == KERNEL_DS, checking is bypassed.
*
* For historical reasons (Data Segment Register?), these macros are misnamed.
*/
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
#define segment_eq(a,b) ((a).seg == (b).seg)
#define get_ds() (KERNEL_DS)
#if !defined(CONFIG_MMU)
/* NOMMU is always true */
#define __addr_ok(addr) (1)
static
inline
mm_segment_t
get_fs
(
void
)
{
return
USER_DS
;
}
static
inline
void
set_fs
(
mm_segment_t
s
)
{
}
/*
* __access_ok: Check if address with size is OK or not.
*
* If we don't have an MMU (or if its disabled) the only thing we really have
* to look out for is if the address resides somewhere outside of what
* available RAM we have.
*
* TODO: This check could probably also stand to be restricted somewhat more..
* though it still does the Right Thing(tm) for the time being.
*/
static
inline
int
__access_ok
(
unsigned
long
addr
,
unsigned
long
size
)
{
return
((
addr
>=
memory_start
)
&&
((
addr
+
size
)
<
memory_end
));
}
#else
/* CONFIG_MMU */
#define __addr_ok(addr) \
((unsigned long)(addr) < (current_thread_info()->addr_limit.seg))
#define get_fs() (current_thread_info()->addr_limit)
#define set_fs(x) (current_thread_info()->addr_limit = (x))
/*
* __access_ok: Check if address with size is OK or not.
*
* Uhhuh, this needs 33-bit arithmetic. We have a carry..
*
* sum := addr + size; carry? --> flag = true;
* if (sum >= addr_limit) flag = true;
*/
static
inline
int
__access_ok
(
unsigned
long
addr
,
unsigned
long
size
)
{
unsigned
long
flag
,
sum
;
__asm__
(
"clrt
\n\t
"
"addc %3, %1
\n\t
"
"movt %0
\n\t
"
"cmp/hi %4, %1
\n\t
"
"rotcl %0"
:
"=&r"
(
flag
),
"=r"
(
sum
)
:
"1"
(
addr
),
"r"
(
size
),
"r"
(
current_thread_info
()
->
addr_limit
.
seg
)
:
"t"
);
return
flag
==
0
;
}
#endif
/* CONFIG_MMU */
static
inline
int
access_ok
(
int
type
,
const
void
__user
*
p
,
unsigned
long
size
)
{
unsigned
long
addr
=
(
unsigned
long
)
p
;
return
__access_ok
(
addr
,
size
);
}
/*
* Uh, these should become the main single-value transfer routines ...
* They automatically use the right size if we just have the right
* pointer type ...
*
* As SuperH uses the same address space for kernel and user data, we
* can just do these as direct assignments.
*
* Careful to not
* (a) re-use the arguments for side effects (sizeof is ok)
* (b) require any knowledge of processes at this stage
*/
#define put_user(x,ptr) __put_user_check((x),(ptr),sizeof(*(ptr)))
#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr)))
/*
* The "__xxx" versions do not do address space checking, useful when
* doing multiple accesses to the same area (the user has to do the
* checks by hand with "access_ok()")
*/
#define __put_user(x,ptr) \
__put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
#define __get_user(x,ptr) \
__get_user_nocheck((x),(ptr),sizeof(*(ptr)))
struct
__large_struct
{
unsigned
long
buf
[
100
];
};
#define __m(x) (*(struct __large_struct __user *)(x))
#define __get_user_size(x,ptr,size,retval) \
do { \
retval = 0; \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__get_user_asm(x, ptr, retval, "b"); \
break; \
case 2: \
__get_user_asm(x, ptr, retval, "w"); \
break; \
case 4: \
__get_user_asm(x, ptr, retval, "l"); \
break; \
default: \
__get_user_unknown(); \
break; \
} \
} while (0)
#define __get_user_nocheck(x,ptr,size) \
({ \
long __gu_err, __gu_val; \
__get_user_size(__gu_val, (ptr), (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
#ifdef CONFIG_MMU
#define __get_user_check(x,ptr,size) \
({ \
long __gu_err, __gu_val; \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__get_user_1(__gu_val, (ptr), __gu_err); \
break; \
case 2: \
__get_user_2(__gu_val, (ptr), __gu_err); \
break; \
case 4: \
__get_user_4(__gu_val, (ptr), __gu_err); \
break; \
default: \
__get_user_unknown(); \
break; \
} \
\
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
#define __get_user_1(x,addr,err) ({ \
__asm__("stc r7_bank, %1\n\t" \
"mov.l @(8,%1), %1\n\t" \
"and %2, %1\n\t" \
"cmp/pz %1\n\t" \
"bt/s 1f\n\t" \
" mov #0, %0\n\t" \
"0:\n" \
"mov #-14, %0\n\t" \
"bra 2f\n\t" \
" mov #0, %1\n" \
"1:\n\t" \
"mov.b @%2, %1\n\t" \
"extu.b %1, %1\n" \
"2:\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 0b\n\t" \
".previous" \
: "=&r" (err), "=&r" (x) \
: "r" (addr) \
: "t"); \
})
#define __get_user_2(x,addr,err) ({ \
__asm__("stc r7_bank, %1\n\t" \
"mov.l @(8,%1), %1\n\t" \
"and %2, %1\n\t" \
"cmp/pz %1\n\t" \
"bt/s 1f\n\t" \
" mov #0, %0\n\t" \
"0:\n" \
"mov #-14, %0\n\t" \
"bra 2f\n\t" \
" mov #0, %1\n" \
"1:\n\t" \
"mov.w @%2, %1\n\t" \
"extu.w %1, %1\n" \
"2:\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 0b\n\t" \
".previous" \
: "=&r" (err), "=&r" (x) \
: "r" (addr) \
: "t"); \
})
#define __get_user_4(x,addr,err) ({ \
__asm__("stc r7_bank, %1\n\t" \
"mov.l @(8,%1), %1\n\t" \
"and %2, %1\n\t" \
"cmp/pz %1\n\t" \
"bt/s 1f\n\t" \
" mov #0, %0\n\t" \
"0:\n" \
"mov #-14, %0\n\t" \
"bra 2f\n\t" \
" mov #0, %1\n" \
"1:\n\t" \
"mov.l @%2, %1\n\t" \
"2:\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 0b\n\t" \
".previous" \
: "=&r" (err), "=&r" (x) \
: "r" (addr) \
: "t"); \
})
#else
/* CONFIG_MMU */
#define __get_user_check(x,ptr,size) \
({ \
long __gu_err, __gu_val; \
if (__access_ok((unsigned long)(ptr), (size))) { \
__get_user_size(__gu_val, (ptr), (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
} else \
__gu_err = -EFAULT; \
__gu_err; \
})
#endif
#define __get_user_asm(x, addr, err, insn) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov." insn " %2, %1\n\t" \
"mov #0, %0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"mov #0, %1\n\t" \
"mov.l 4f, %0\n\t" \
"jmp @%0\n\t" \
" mov %3, %0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
:"=&r" (err), "=&r" (x) \
:"m" (__m(addr)), "i" (-EFAULT)); })
extern
void
__get_user_unknown
(
void
);
#define __put_user_size(x,ptr,size,retval) \
do { \
retval = 0; \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__put_user_asm(x, ptr, retval, "b"); \
break; \
case 2: \
__put_user_asm(x, ptr, retval, "w"); \
break; \
case 4: \
__put_user_asm(x, ptr, retval, "l"); \
break; \
case 8: \
__put_user_u64(x, ptr, retval); \
break; \
default: \
__put_user_unknown(); \
} \
} while (0)
#define __put_user_nocheck(x,ptr,size) \
({ \
long __pu_err; \
__put_user_size((x),(ptr),(size),__pu_err); \
__pu_err; \
})
#define __put_user_check(x,ptr,size) \
({ \
long __pu_err = -EFAULT; \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
\
if (__access_ok((unsigned long)__pu_addr,size)) \
__put_user_size((x),__pu_addr,(size),__pu_err); \
__pu_err; \
})
#define __put_user_asm(x, addr, err, insn) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov." insn " %1, %2\n\t" \
"mov #0, %0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"nop\n\t" \
"mov.l 4f, %0\n\t" \
"jmp @%0\n\t" \
"mov %3, %0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
:"=&r" (err) \
:"r" (x), "m" (__m(addr)), "i" (-EFAULT) \
:"memory"); })
#if defined(__LITTLE_ENDIAN__)
#define __put_user_u64(val,addr,retval) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov.l %R1,%2\n\t" \
"mov.l %S1,%T2\n\t" \
"mov #0,%0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"nop\n\t" \
"mov.l 4f,%0\n\t" \
"jmp @%0\n\t" \
" mov %3,%0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
: "=r" (retval) \
: "r" (val), "m" (__m(addr)), "i" (-EFAULT) \
: "memory"); })
#ifdef CONFIG_SUPERH32
# include "uaccess_32.h"
#else
#define __put_user_u64(val,addr,retval) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov.l %S1,%2\n\t" \
"mov.l %R1,%T2\n\t" \
"mov #0,%0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"nop\n\t" \
"mov.l 4f,%0\n\t" \
"jmp @%0\n\t" \
" mov %3,%0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
: "=r" (retval) \
: "r" (val), "m" (__m(addr)), "i" (-EFAULT) \
: "memory"); })
# include "uaccess_64.h"
#endif
extern
void
__put_user_unknown
(
void
);
/* Generic arbitrary sized copy. */
/* Return the number of bytes NOT copied */
__kernel_size_t
__copy_user
(
void
*
to
,
const
void
*
from
,
__kernel_size_t
n
);
#define copy_to_user(to,from,n) ({ \
void *__copy_to = (void *) (to); \
__kernel_size_t __copy_size = (__kernel_size_t) (n); \
__kernel_size_t __copy_res; \
if(__copy_size && __access_ok((unsigned long)__copy_to, __copy_size)) { \
__copy_res = __copy_user(__copy_to, (void *) (from), __copy_size); \
} else __copy_res = __copy_size; \
__copy_res; })
#define copy_from_user(to,from,n) ({ \
void *__copy_to = (void *) (to); \
void *__copy_from = (void *) (from); \
__kernel_size_t __copy_size = (__kernel_size_t) (n); \
__kernel_size_t __copy_res; \
if(__copy_size && __access_ok((unsigned long)__copy_from, __copy_size)) { \
__copy_res = __copy_user(__copy_to, __copy_from, __copy_size); \
} else __copy_res = __copy_size; \
__copy_res; })
static
__always_inline
unsigned
long
__copy_from_user
(
void
*
to
,
const
void
__user
*
from
,
unsigned
long
n
)
{
return
__copy_user
(
to
,
(
__force
void
*
)
from
,
n
);
}
static
__always_inline
unsigned
long
__must_check
__copy_to_user
(
void
__user
*
to
,
const
void
*
from
,
unsigned
long
n
)
{
return
__copy_user
((
__force
void
*
)
to
,
from
,
n
);
}
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
/*
* Clear the area and return remaining number of bytes
* (on failure. Usually it's 0.)
*/
extern
__kernel_size_t
__clear_user
(
void
*
addr
,
__kernel_size_t
size
);
#define clear_user(addr,n) ({ \
void * __cl_addr = (addr); \
unsigned long __cl_size = (n); \
if (__cl_size && __access_ok(((unsigned long)(__cl_addr)), __cl_size)) \
__cl_size = __clear_user(__cl_addr, __cl_size); \
__cl_size; })
static
__inline__
int
__strncpy_from_user
(
unsigned
long
__dest
,
unsigned
long
__user
__src
,
int
__count
)
{
__kernel_size_t
res
;
unsigned
long
__dummy
,
_d
,
_s
;
__asm__
__volatile__
(
"9:
\n
"
"mov.b @%2+, %1
\n\t
"
"cmp/eq #0, %1
\n\t
"
"bt/s 2f
\n
"
"1:
\n
"
"mov.b %1, @%3
\n\t
"
"dt %7
\n\t
"
"bf/s 9b
\n\t
"
" add #1, %3
\n\t
"
"2:
\n\t
"
"sub %7, %0
\n
"
"3:
\n
"
".section .fixup,
\"
ax
\"\n
"
"4:
\n\t
"
"mov.l 5f, %1
\n\t
"
"jmp @%1
\n\t
"
" mov %8, %0
\n\t
"
".balign 4
\n
"
"5: .long 3b
\n
"
".previous
\n
"
".section __ex_table,
\"
a
\"\n
"
" .balign 4
\n
"
" .long 9b,4b
\n
"
".previous"
:
"=r"
(
res
),
"=&z"
(
__dummy
),
"=r"
(
_s
),
"=r"
(
_d
)
:
"0"
(
__count
),
"2"
(
__src
),
"3"
(
__dest
),
"r"
(
__count
),
"i"
(
-
EFAULT
)
:
"memory"
,
"t"
);
return
res
;
}
#define strncpy_from_user(dest,src,count) ({ \
unsigned long __sfu_src = (unsigned long) (src); \
int __sfu_count = (int) (count); \
long __sfu_res = -EFAULT; \
if(__access_ok(__sfu_src, __sfu_count)) { \
__sfu_res = __strncpy_from_user((unsigned long) (dest), __sfu_src, __sfu_count); \
} __sfu_res; })
/*
* Return the size of a string (including the ending 0!)
*/
static
__inline__
long
__strnlen_user
(
const
char
__user
*
__s
,
long
__n
)
{
unsigned
long
res
;
unsigned
long
__dummy
;
__asm__
__volatile__
(
"9:
\n
"
"cmp/eq %4, %0
\n\t
"
"bt 2f
\n
"
"1:
\t
"
"mov.b @(%0,%3), %1
\n\t
"
"tst %1, %1
\n\t
"
"bf/s 9b
\n\t
"
" add #1, %0
\n
"
"2:
\n
"
".section .fixup,
\"
ax
\"\n
"
"3:
\n\t
"
"mov.l 4f, %1
\n\t
"
"jmp @%1
\n\t
"
" mov #0, %0
\n
"
".balign 4
\n
"
"4: .long 2b
\n
"
".previous
\n
"
".section __ex_table,
\"
a
\"\n
"
" .balign 4
\n
"
" .long 1b,3b
\n
"
".previous"
:
"=z"
(
res
),
"=&r"
(
__dummy
)
:
"0"
(
0
),
"r"
(
__s
),
"r"
(
__n
)
:
"t"
);
return
res
;
}
static
__inline__
long
strnlen_user
(
const
char
__user
*
s
,
long
n
)
{
if
(
!
__addr_ok
(
s
))
return
0
;
else
return
__strnlen_user
(
s
,
n
);
}
#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
/*
* The exception table consists of pairs of addresses: the first is the
* address of an instruction that is allowed to fault, and the second is
* the address at which the program should continue. No registers are
* modified, so it is entirely up to the continuation code to figure out
* what to do.
*
* All the routines below use bits of fixup code that are out of line
* with the main instruction path. This means when everything is well,
* we don't even have to jump over them. Further, they do not intrude
* on our cache or tlb entries.
*/
struct
exception_table_entry
{
unsigned
long
insn
,
fixup
;
};
extern
int
fixup_exception
(
struct
pt_regs
*
regs
);
#endif
/* __ASM_SH_UACCESS_H */
include/asm-sh/uaccess_32.h
0 → 100644
浏览文件 @
9b01bd9e
/* $Id: uaccess.h,v 1.11 2003/10/13 07:21:20 lethal Exp $
*
* User space memory access functions
*
* Copyright (C) 1999, 2002 Niibe Yutaka
* Copyright (C) 2003 Paul Mundt
*
* Based on:
* MIPS implementation version 1.15 by
* Copyright (C) 1996, 1997, 1998 by Ralf Baechle
* and i386 version.
*/
#ifndef __ASM_SH_UACCESS_H
#define __ASM_SH_UACCESS_H
#include <linux/errno.h>
#include <linux/sched.h>
#define VERIFY_READ 0
#define VERIFY_WRITE 1
/*
* The fs value determines whether argument validity checking should be
* performed or not. If get_fs() == USER_DS, checking is performed, with
* get_fs() == KERNEL_DS, checking is bypassed.
*
* For historical reasons (Data Segment Register?), these macros are misnamed.
*/
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
#define segment_eq(a,b) ((a).seg == (b).seg)
#define get_ds() (KERNEL_DS)
#if !defined(CONFIG_MMU)
/* NOMMU is always true */
#define __addr_ok(addr) (1)
static
inline
mm_segment_t
get_fs
(
void
)
{
return
USER_DS
;
}
static
inline
void
set_fs
(
mm_segment_t
s
)
{
}
/*
* __access_ok: Check if address with size is OK or not.
*
* If we don't have an MMU (or if its disabled) the only thing we really have
* to look out for is if the address resides somewhere outside of what
* available RAM we have.
*
* TODO: This check could probably also stand to be restricted somewhat more..
* though it still does the Right Thing(tm) for the time being.
*/
static
inline
int
__access_ok
(
unsigned
long
addr
,
unsigned
long
size
)
{
return
((
addr
>=
memory_start
)
&&
((
addr
+
size
)
<
memory_end
));
}
#else
/* CONFIG_MMU */
#define __addr_ok(addr) \
((unsigned long)(addr) < (current_thread_info()->addr_limit.seg))
#define get_fs() (current_thread_info()->addr_limit)
#define set_fs(x) (current_thread_info()->addr_limit = (x))
/*
* __access_ok: Check if address with size is OK or not.
*
* We do three checks:
* (1) is it user space?
* (2) addr + size --> carry?
* (3) addr + size >= 0x80000000 (PAGE_OFFSET)
*
* (1) (2) (3) | RESULT
* 0 0 0 | ok
* 0 0 1 | ok
* 0 1 0 | bad
* 0 1 1 | bad
* 1 0 0 | ok
* 1 0 1 | bad
* 1 1 0 | bad
* 1 1 1 | bad
*/
static
inline
int
__access_ok
(
unsigned
long
addr
,
unsigned
long
size
)
{
unsigned
long
flag
,
tmp
;
__asm__
(
"stc r7_bank, %0
\n\t
"
"mov.l @(8,%0), %0
\n\t
"
"clrt
\n\t
"
"addc %2, %1
\n\t
"
"and %1, %0
\n\t
"
"rotcl %0
\n\t
"
"rotcl %0
\n\t
"
"and #3, %0"
:
"=&z"
(
flag
),
"=r"
(
tmp
)
:
"r"
(
addr
),
"1"
(
size
)
:
"t"
);
return
flag
==
0
;
}
#endif
/* CONFIG_MMU */
static
inline
int
access_ok
(
int
type
,
const
void
__user
*
p
,
unsigned
long
size
)
{
unsigned
long
addr
=
(
unsigned
long
)
p
;
return
__access_ok
(
addr
,
size
);
}
/*
* Uh, these should become the main single-value transfer routines ...
* They automatically use the right size if we just have the right
* pointer type ...
*
* As SuperH uses the same address space for kernel and user data, we
* can just do these as direct assignments.
*
* Careful to not
* (a) re-use the arguments for side effects (sizeof is ok)
* (b) require any knowledge of processes at this stage
*/
#define put_user(x,ptr) __put_user_check((x),(ptr),sizeof(*(ptr)))
#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr)))
/*
* The "__xxx" versions do not do address space checking, useful when
* doing multiple accesses to the same area (the user has to do the
* checks by hand with "access_ok()")
*/
#define __put_user(x,ptr) \
__put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
#define __get_user(x,ptr) \
__get_user_nocheck((x),(ptr),sizeof(*(ptr)))
struct
__large_struct
{
unsigned
long
buf
[
100
];
};
#define __m(x) (*(struct __large_struct __user *)(x))
#define __get_user_size(x,ptr,size,retval) \
do { \
retval = 0; \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__get_user_asm(x, ptr, retval, "b"); \
break; \
case 2: \
__get_user_asm(x, ptr, retval, "w"); \
break; \
case 4: \
__get_user_asm(x, ptr, retval, "l"); \
break; \
default: \
__get_user_unknown(); \
break; \
} \
} while (0)
#define __get_user_nocheck(x,ptr,size) \
({ \
long __gu_err, __gu_val; \
__get_user_size(__gu_val, (ptr), (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
#ifdef CONFIG_MMU
#define __get_user_check(x,ptr,size) \
({ \
long __gu_err, __gu_val; \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__get_user_1(__gu_val, (ptr), __gu_err); \
break; \
case 2: \
__get_user_2(__gu_val, (ptr), __gu_err); \
break; \
case 4: \
__get_user_4(__gu_val, (ptr), __gu_err); \
break; \
default: \
__get_user_unknown(); \
break; \
} \
\
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
#define __get_user_1(x,addr,err) ({ \
__asm__("stc r7_bank, %1\n\t" \
"mov.l @(8,%1), %1\n\t" \
"and %2, %1\n\t" \
"cmp/pz %1\n\t" \
"bt/s 1f\n\t" \
" mov #0, %0\n\t" \
"0:\n" \
"mov #-14, %0\n\t" \
"bra 2f\n\t" \
" mov #0, %1\n" \
"1:\n\t" \
"mov.b @%2, %1\n\t" \
"extu.b %1, %1\n" \
"2:\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 0b\n\t" \
".previous" \
: "=&r" (err), "=&r" (x) \
: "r" (addr) \
: "t"); \
})
#define __get_user_2(x,addr,err) ({ \
__asm__("stc r7_bank, %1\n\t" \
"mov.l @(8,%1), %1\n\t" \
"and %2, %1\n\t" \
"cmp/pz %1\n\t" \
"bt/s 1f\n\t" \
" mov #0, %0\n\t" \
"0:\n" \
"mov #-14, %0\n\t" \
"bra 2f\n\t" \
" mov #0, %1\n" \
"1:\n\t" \
"mov.w @%2, %1\n\t" \
"extu.w %1, %1\n" \
"2:\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 0b\n\t" \
".previous" \
: "=&r" (err), "=&r" (x) \
: "r" (addr) \
: "t"); \
})
#define __get_user_4(x,addr,err) ({ \
__asm__("stc r7_bank, %1\n\t" \
"mov.l @(8,%1), %1\n\t" \
"and %2, %1\n\t" \
"cmp/pz %1\n\t" \
"bt/s 1f\n\t" \
" mov #0, %0\n\t" \
"0:\n" \
"mov #-14, %0\n\t" \
"bra 2f\n\t" \
" mov #0, %1\n" \
"1:\n\t" \
"mov.l @%2, %1\n\t" \
"2:\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 0b\n\t" \
".previous" \
: "=&r" (err), "=&r" (x) \
: "r" (addr) \
: "t"); \
})
#else
/* CONFIG_MMU */
#define __get_user_check(x,ptr,size) \
({ \
long __gu_err, __gu_val; \
if (__access_ok((unsigned long)(ptr), (size))) { \
__get_user_size(__gu_val, (ptr), (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
} else \
__gu_err = -EFAULT; \
__gu_err; \
})
#endif
#define __get_user_asm(x, addr, err, insn) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov." insn " %2, %1\n\t" \
"mov #0, %0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"mov #0, %1\n\t" \
"mov.l 4f, %0\n\t" \
"jmp @%0\n\t" \
" mov %3, %0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
:"=&r" (err), "=&r" (x) \
:"m" (__m(addr)), "i" (-EFAULT)); })
extern
void
__get_user_unknown
(
void
);
#define __put_user_size(x,ptr,size,retval) \
do { \
retval = 0; \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__put_user_asm(x, ptr, retval, "b"); \
break; \
case 2: \
__put_user_asm(x, ptr, retval, "w"); \
break; \
case 4: \
__put_user_asm(x, ptr, retval, "l"); \
break; \
case 8: \
__put_user_u64(x, ptr, retval); \
break; \
default: \
__put_user_unknown(); \
} \
} while (0)
#define __put_user_nocheck(x,ptr,size) \
({ \
long __pu_err; \
__put_user_size((x),(ptr),(size),__pu_err); \
__pu_err; \
})
#define __put_user_check(x,ptr,size) \
({ \
long __pu_err = -EFAULT; \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
\
if (__access_ok((unsigned long)__pu_addr,size)) \
__put_user_size((x),__pu_addr,(size),__pu_err); \
__pu_err; \
})
#define __put_user_asm(x, addr, err, insn) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov." insn " %1, %2\n\t" \
"mov #0, %0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"nop\n\t" \
"mov.l 4f, %0\n\t" \
"jmp @%0\n\t" \
"mov %3, %0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
:"=&r" (err) \
:"r" (x), "m" (__m(addr)), "i" (-EFAULT) \
:"memory"); })
#if defined(__LITTLE_ENDIAN__)
#define __put_user_u64(val,addr,retval) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov.l %R1,%2\n\t" \
"mov.l %S1,%T2\n\t" \
"mov #0,%0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"nop\n\t" \
"mov.l 4f,%0\n\t" \
"jmp @%0\n\t" \
" mov %3,%0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
: "=r" (retval) \
: "r" (val), "m" (__m(addr)), "i" (-EFAULT) \
: "memory"); })
#else
#define __put_user_u64(val,addr,retval) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov.l %S1,%2\n\t" \
"mov.l %R1,%T2\n\t" \
"mov #0,%0\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"nop\n\t" \
"mov.l 4f,%0\n\t" \
"jmp @%0\n\t" \
" mov %3,%0\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".previous" \
: "=r" (retval) \
: "r" (val), "m" (__m(addr)), "i" (-EFAULT) \
: "memory"); })
#endif
extern
void
__put_user_unknown
(
void
);
/* Generic arbitrary sized copy. */
/* Return the number of bytes NOT copied */
__kernel_size_t
__copy_user
(
void
*
to
,
const
void
*
from
,
__kernel_size_t
n
);
#define copy_to_user(to,from,n) ({ \
void *__copy_to = (void *) (to); \
__kernel_size_t __copy_size = (__kernel_size_t) (n); \
__kernel_size_t __copy_res; \
if(__copy_size && __access_ok((unsigned long)__copy_to, __copy_size)) { \
__copy_res = __copy_user(__copy_to, (void *) (from), __copy_size); \
} else __copy_res = __copy_size; \
__copy_res; })
#define copy_from_user(to,from,n) ({ \
void *__copy_to = (void *) (to); \
void *__copy_from = (void *) (from); \
__kernel_size_t __copy_size = (__kernel_size_t) (n); \
__kernel_size_t __copy_res; \
if(__copy_size && __access_ok((unsigned long)__copy_from, __copy_size)) { \
__copy_res = __copy_user(__copy_to, __copy_from, __copy_size); \
} else __copy_res = __copy_size; \
__copy_res; })
static
__always_inline
unsigned
long
__copy_from_user
(
void
*
to
,
const
void
__user
*
from
,
unsigned
long
n
)
{
return
__copy_user
(
to
,
(
__force
void
*
)
from
,
n
);
}
static
__always_inline
unsigned
long
__must_check
__copy_to_user
(
void
__user
*
to
,
const
void
*
from
,
unsigned
long
n
)
{
return
__copy_user
((
__force
void
*
)
to
,
from
,
n
);
}
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
/*
* Clear the area and return remaining number of bytes
* (on failure. Usually it's 0.)
*/
extern
__kernel_size_t
__clear_user
(
void
*
addr
,
__kernel_size_t
size
);
#define clear_user(addr,n) ({ \
void * __cl_addr = (addr); \
unsigned long __cl_size = (n); \
if (__cl_size && __access_ok(((unsigned long)(__cl_addr)), __cl_size)) \
__cl_size = __clear_user(__cl_addr, __cl_size); \
__cl_size; })
static
__inline__
int
__strncpy_from_user
(
unsigned
long
__dest
,
unsigned
long
__user
__src
,
int
__count
)
{
__kernel_size_t
res
;
unsigned
long
__dummy
,
_d
,
_s
;
__asm__
__volatile__
(
"9:
\n
"
"mov.b @%2+, %1
\n\t
"
"cmp/eq #0, %1
\n\t
"
"bt/s 2f
\n
"
"1:
\n
"
"mov.b %1, @%3
\n\t
"
"dt %7
\n\t
"
"bf/s 9b
\n\t
"
" add #1, %3
\n\t
"
"2:
\n\t
"
"sub %7, %0
\n
"
"3:
\n
"
".section .fixup,
\"
ax
\"\n
"
"4:
\n\t
"
"mov.l 5f, %1
\n\t
"
"jmp @%1
\n\t
"
" mov %8, %0
\n\t
"
".balign 4
\n
"
"5: .long 3b
\n
"
".previous
\n
"
".section __ex_table,
\"
a
\"\n
"
" .balign 4
\n
"
" .long 9b,4b
\n
"
".previous"
:
"=r"
(
res
),
"=&z"
(
__dummy
),
"=r"
(
_s
),
"=r"
(
_d
)
:
"0"
(
__count
),
"2"
(
__src
),
"3"
(
__dest
),
"r"
(
__count
),
"i"
(
-
EFAULT
)
:
"memory"
,
"t"
);
return
res
;
}
#define strncpy_from_user(dest,src,count) ({ \
unsigned long __sfu_src = (unsigned long) (src); \
int __sfu_count = (int) (count); \
long __sfu_res = -EFAULT; \
if(__access_ok(__sfu_src, __sfu_count)) { \
__sfu_res = __strncpy_from_user((unsigned long) (dest), __sfu_src, __sfu_count); \
} __sfu_res; })
/*
* Return the size of a string (including the ending 0!)
*/
static
__inline__
long
__strnlen_user
(
const
char
__user
*
__s
,
long
__n
)
{
unsigned
long
res
;
unsigned
long
__dummy
;
__asm__
__volatile__
(
"9:
\n
"
"cmp/eq %4, %0
\n\t
"
"bt 2f
\n
"
"1:
\t
"
"mov.b @(%0,%3), %1
\n\t
"
"tst %1, %1
\n\t
"
"bf/s 9b
\n\t
"
" add #1, %0
\n
"
"2:
\n
"
".section .fixup,
\"
ax
\"\n
"
"3:
\n\t
"
"mov.l 4f, %1
\n\t
"
"jmp @%1
\n\t
"
" mov #0, %0
\n
"
".balign 4
\n
"
"4: .long 2b
\n
"
".previous
\n
"
".section __ex_table,
\"
a
\"\n
"
" .balign 4
\n
"
" .long 1b,3b
\n
"
".previous"
:
"=z"
(
res
),
"=&r"
(
__dummy
)
:
"0"
(
0
),
"r"
(
__s
),
"r"
(
__n
)
:
"t"
);
return
res
;
}
static
__inline__
long
strnlen_user
(
const
char
__user
*
s
,
long
n
)
{
if
(
!
__addr_ok
(
s
))
return
0
;
else
return
__strnlen_user
(
s
,
n
);
}
#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
/*
* The exception table consists of pairs of addresses: the first is the
* address of an instruction that is allowed to fault, and the second is
* the address at which the program should continue. No registers are
* modified, so it is entirely up to the continuation code to figure out
* what to do.
*
* All the routines below use bits of fixup code that are out of line
* with the main instruction path. This means when everything is well,
* we don't even have to jump over them. Further, they do not intrude
* on our cache or tlb entries.
*/
struct
exception_table_entry
{
unsigned
long
insn
,
fixup
;
};
extern
int
fixup_exception
(
struct
pt_regs
*
regs
);
#endif
/* __ASM_SH_UACCESS_H */
include/asm-sh
64/uaccess
.h
→
include/asm-sh
/uaccess_64
.h
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