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raspberrypi-kernel
提交 b896313e 编写于 作者: J Joe Perches 提交者： Ingo Molnar
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include/asm-x86/uaccess_64.h: checkpatch cleanups - formatting only 

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 b1fcec7f
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Showing with 227 addition and 149 deletion
include/asm-x86/uaccess_64.h
浏览文件 @ b896313e
......@@ -29,23 +29,27 @@
#define get_fs() (current_thread_info()->addr_limit)
#define set_fs(x) (current_thread_info()->addr_limit = (x))
#define segment_eq(a,b) ((a).seg == (b).seg)
#define segment_eq(a, b) ((a).seg == (b).seg)
#define __addr_ok(addr) (!((unsigned long)(addr) & (current_thread_info()->addr_limit.seg)))
#define __addr_ok(addr) (!((unsigned long)(addr) & \
(current_thread_info()->addr_limit.seg)))
/*
* Uhhuh, this needs 65-bit arithmetic. We have a carry..
*/
#define __range_not_ok(addr,size) ({ \
unsigned long flag,roksum; \
__chk_user_ptr(addr); \
asm("# range_ok\n\r" \
"addq %3,%1 ; sbbq %0,%0 ; cmpq %1,%4 ; sbbq $0,%0" \
:"=&r" (flag), "=r" (roksum) \
:"1" (addr),"g" ((long)(size)),"g" (current_thread_info()->addr_limit.seg)); \
flag; })
#define __range_not_ok(addr, size) \
({ \
unsigned long flag, roksum; \
__chk_user_ptr(addr); \
asm("# range_ok\n\r" \
"addq %3,%1 ; sbbq %0,%0 ; cmpq %1,%4 ; sbbq $0,%0" \
: "=&r" (flag), "=r" (roksum) \
: "1" (addr), "g" ((long)(size)), \
"g" (current_thread_info()->addr_limit.seg)); \
flag; \
})
#define access_ok(type, addr, size) (__range_not_ok(addr,size) == 0)
#define access_ok(type, addr, size) (__range_not_ok(addr, size) == 0)
/*
* The exception table consists of pairs of addresses: the first is the
......@@ -60,8 +64,7 @@
* on our cache or tlb entries.
*/
struct exception_table_entry
{
struct exception_table_entry {
unsigned long insn, fixup;
};
......@@ -84,23 +87,36 @@ extern int fixup_exception(struct pt_regs *regs);
* accesses to the same area of user memory).
*/
#define __get_user_x(size,ret,x,ptr) \
asm volatile("call __get_user_" #size \
:"=a" (ret),"=d" (x) \
:"c" (ptr) \
:"r8")
#define __get_user_x(size, ret, x, ptr) \
asm volatile("call __get_user_" #size \
: "=a" (ret),"=d" (x) \
: "c" (ptr) \
: "r8")
/* Careful: we have to cast the result to the type of the pointer
* for sign reasons */
/* Careful: we have to cast the result to the type of the pointer for sign reasons */
#define get_user(x,ptr) \
({ unsigned long __val_gu; \
int __ret_gu; \
#define get_user(x, ptr) \
({ \
unsigned long __val_gu; \
int __ret_gu; \
__chk_user_ptr(ptr); \
switch(sizeof (*(ptr))) { \
case 1: __get_user_x(1,__ret_gu,__val_gu,ptr); break; \
case 2: __get_user_x(2,__ret_gu,__val_gu,ptr); break; \
case 4: __get_user_x(4,__ret_gu,__val_gu,ptr); break; \
case 8: __get_user_x(8,__ret_gu,__val_gu,ptr); break; \
default: __get_user_bad(); break; \
switch (sizeof(*(ptr))) { \
case 1: \
__get_user_x(1, __ret_gu, __val_gu, ptr); \
break; \
case 2: \
__get_user_x(2, __ret_gu, __val_gu, ptr); \
break; \
case 4: \
__get_user_x(4, __ret_gu, __val_gu, ptr); \
break; \
case 8: \
__get_user_x(8, __ret_gu, __val_gu, ptr); \
break; \
default: \
__get_user_bad(); \
break; \
} \
(x) = (__force typeof(*(ptr)))__val_gu; \
__ret_gu; \
......@@ -112,55 +128,73 @@ extern void __put_user_4(void);
extern void __put_user_8(void);
extern void __put_user_bad(void);
#define __put_user_x(size,ret,x,ptr) \
asm volatile("call __put_user_" #size \
:"=a" (ret) \
:"c" (ptr),"d" (x) \
:"r8")
#define __put_user_x(size, ret, x, ptr) \
asm volatile("call __put_user_" #size \
:"=a" (ret) \
:"c" (ptr),"d" (x) \
:"r8")
#define put_user(x,ptr) \
__put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
#define put_user(x, ptr) \
__put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
#define __get_user(x,ptr) \
__get_user_nocheck((x),(ptr),sizeof(*(ptr)))
#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)))
#define __put_user(x, ptr) \
__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
#define __get_user_unaligned __get_user
#define __put_user_unaligned __put_user
#define __put_user_nocheck(x,ptr,size) \
#define __put_user_nocheck(x, ptr, size) \
({ \
int __pu_err; \
__put_user_size((x),(ptr),(size),__pu_err); \
__put_user_size((x), (ptr), (size), __pu_err); \
__pu_err; \
})
#define __put_user_check(x,ptr,size) \
({ \
int __pu_err; \
typeof(*(ptr)) __user *__pu_addr = (ptr); \
switch (size) { \
case 1: __put_user_x(1,__pu_err,x,__pu_addr); break; \
case 2: __put_user_x(2,__pu_err,x,__pu_addr); break; \
case 4: __put_user_x(4,__pu_err,x,__pu_addr); break; \
case 8: __put_user_x(8,__pu_err,x,__pu_addr); break; \
default: __put_user_bad(); \
} \
__pu_err; \
#define __put_user_check(x, ptr, size) \
({ \
int __pu_err; \
typeof(*(ptr)) __user *__pu_addr = (ptr); \
switch (size) { \
case 1: \
__put_user_x(1, __pu_err, x, __pu_addr); \
break; \
case 2: \
__put_user_x(2, __pu_err, x, __pu_addr); \
break; \
case 4: \
__put_user_x(4, __pu_err, x, __pu_addr); \
break; \
case 8: \
__put_user_x(8, __pu_err, x, __pu_addr); \
break; \
default: \
__put_user_bad(); \
} \
__pu_err; \
})
#define __put_user_size(x,ptr,size,retval) \
#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","b","iq",-EFAULT); break;\
case 2: __put_user_asm(x,ptr,retval,"w","w","ir",-EFAULT); break;\
case 4: __put_user_asm(x,ptr,retval,"l","k","ir",-EFAULT); break;\
case 8: __put_user_asm(x,ptr,retval,"q","","Zr",-EFAULT); break;\
default: __put_user_bad(); \
case 1: \
__put_user_asm(x, ptr, retval, "b", "b", "iq", -EFAULT);\
break; \
case 2: \
__put_user_asm(x, ptr, retval, "w", "w", "ir", -EFAULT);\
break; \
case 4: \
__put_user_asm(x, ptr, retval, "l", "k", "ir", -EFAULT);\
break; \
case 8: \
__put_user_asm(x, ptr, retval, "q", "", "Zr", -EFAULT); \
break; \
default: \
__put_user_bad(); \
} \
} while (0)
......@@ -174,23 +208,22 @@ struct __large_struct { unsigned long buf[100]; };
* aliasing issues.
*/
#define __put_user_asm(x, addr, err, itype, rtype, ltype, errno) \
asm volatile( \
"1: mov"itype" %"rtype"1,%2\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3: mov %3,%0\n" \
" jmp 2b\n" \
".previous\n" \
_ASM_EXTABLE(1b,3b) \
: "=r"(err) \
: ltype (x), "m"(__m(addr)), "i"(errno), "0"(err))
#define __get_user_nocheck(x,ptr,size) \
asm volatile("1: mov"itype" %"rtype"1,%2\n" \
"2:\n" \
".section .fixup, \"ax\"\n" \
"3: mov %3,%0\n" \
" jmp 2b\n" \
".previous\n" \
_ASM_EXTABLE(1b, 3b) \
: "=r"(err) \
: ltype (x), "m" (__m(addr)), "i" (errno), "0" (err))
#define __get_user_nocheck(x, ptr, size) \
({ \
int __gu_err; \
unsigned long __gu_val; \
__get_user_size(__gu_val,(ptr),(size),__gu_err); \
__get_user_size(__gu_val, (ptr), (size), __gu_err); \
(x) = (__force typeof(*(ptr)))__gu_val; \
__gu_err; \
})
......@@ -201,31 +234,39 @@ extern int __get_user_4(void);
extern int __get_user_8(void);
extern int __get_user_bad(void);
#define __get_user_size(x,ptr,size,retval) \
#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","b","=q",-EFAULT); break;\
case 2: __get_user_asm(x,ptr,retval,"w","w","=r",-EFAULT); break;\
case 4: __get_user_asm(x,ptr,retval,"l","k","=r",-EFAULT); break;\
case 8: __get_user_asm(x,ptr,retval,"q","","=r",-EFAULT); break;\
default: (x) = __get_user_bad(); \
case 1: \
__get_user_asm(x, ptr, retval, "b", "b", "=q", -EFAULT);\
break; \
case 2: \
__get_user_asm(x, ptr, retval, "w", "w", "=r", -EFAULT);\
break; \
case 4: \
__get_user_asm(x, ptr, retval, "l", "k", "=r", -EFAULT);\
break; \
case 8: \
__get_user_asm(x, ptr, retval, "q", "", "=r", -EFAULT); \
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))
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
......@@ -244,110 +285,142 @@ copy_in_user(void __user *to, const void __user *from, unsigned len);
static __always_inline __must_check
int __copy_from_user(void *dst, const void __user *src, unsigned size)
{
{
int ret = 0;
if (!__builtin_constant_p(size))
return copy_user_generic(dst,(__force void *)src,size);
switch (size) {
case 1:__get_user_asm(*(u8*)dst,(u8 __user *)src,ret,"b","b","=q",1);
return copy_user_generic(dst, (__force void *)src, size);
switch (size) {
case 1:__get_user_asm(*(u8 *)dst, (u8 __user *)src,
ret, "b", "b", "=q", 1);
return ret;
case 2:__get_user_asm(*(u16*)dst,(u16 __user *)src,ret,"w","w","=r",2);
case 2:__get_user_asm(*(u16 *)dst, (u16 __user *)src,
ret, "w", "w", "=r", 2);
return ret;
case 4:__get_user_asm(*(u32*)dst,(u32 __user *)src,ret,"l","k","=r",4);
case 4:__get_user_asm(*(u32 *)dst, (u32 __user *)src,
ret, "l", "k", "=r", 4);
return ret;
case 8:__get_user_asm(*(u64 *)dst, (u64 __user *)src,
ret, "q", "", "=r", 8);
return ret;
case 8:__get_user_asm(*(u64*)dst,(u64 __user *)src,ret,"q","","=r",8);
return ret;
case 10:
__get_user_asm(*(u64*)dst,(u64 __user *)src,ret,"q","","=r",16);
if (unlikely(ret)) return ret;
__get_user_asm(*(u16*)(8+(char*)dst),(u16 __user *)(8+(char __user *)src),ret,"w","w","=r",2);
return ret;
__get_user_asm(*(u64 *)dst, (u64 __user *)src,
ret, "q", "", "=r", 16);
if (unlikely(ret))
return ret;
__get_user_asm(*(u16 *)(8 + (char *)dst),
(u16 __user *)(8 + (char __user *)src),
ret, "w", "w", "=r", 2);
return ret;
case 16:
__get_user_asm(*(u64*)dst,(u64 __user *)src,ret,"q","","=r",16);
if (unlikely(ret)) return ret;
__get_user_asm(*(u64*)(8+(char*)dst),(u64 __user *)(8+(char __user *)src),ret,"q","","=r",8);
return ret;
__get_user_asm(*(u64 *)dst, (u64 __user *)src,
ret, "q", "", "=r", 16);
if (unlikely(ret))
return ret;
__get_user_asm(*(u64 *)(8 + (char *)dst),
(u64 __user *)(8 + (char __user *)src),
ret, "q", "", "=r", 8);
return ret;
default:
return copy_user_generic(dst,(__force void *)src,size);
return copy_user_generic(dst, (__force void *)src, size);
}
}
}
static __always_inline __must_check
int __copy_to_user(void __user *dst, const void *src, unsigned size)
{
{
int ret = 0;
if (!__builtin_constant_p(size))
return copy_user_generic((__force void *)dst,src,size);
switch (size) {
case 1:__put_user_asm(*(u8*)src,(u8 __user *)dst,ret,"b","b","iq",1);
return copy_user_generic((__force void *)dst, src, size);
switch (size) {
case 1:__put_user_asm(*(u8 *)src, (u8 __user *)dst,
ret, "b", "b", "iq", 1);
return ret;
case 2:__put_user_asm(*(u16*)src,(u16 __user *)dst,ret,"w","w","ir",2);
case 2:__put_user_asm(*(u16 *)src, (u16 __user *)dst,
ret, "w", "w", "ir", 2);
return ret;
case 4:__put_user_asm(*(u32*)src,(u32 __user *)dst,ret,"l","k","ir",4);
case 4:__put_user_asm(*(u32 *)src, (u32 __user *)dst,
ret, "l", "k", "ir", 4);
return ret;
case 8:__put_user_asm(*(u64 *)src, (u64 __user *)dst,
ret, "q", "", "ir", 8);
return ret;
case 8:__put_user_asm(*(u64*)src,(u64 __user *)dst,ret,"q","","ir",8);
return ret;
case 10:
__put_user_asm(*(u64*)src,(u64 __user *)dst,ret,"q","","ir",10);
if (unlikely(ret)) return ret;
__put_user_asm(*(u64 *)src, (u64 __user *)dst,
ret, "q", "", "ir", 10);
if (unlikely(ret))
return ret;
asm("":::"memory");
__put_user_asm(4[(u16*)src],4+(u16 __user *)dst,ret,"w","w","ir",2);
return ret;
__put_user_asm(4[(u16 *)src], 4 + (u16 __user *)dst,
ret, "w", "w", "ir", 2);
return ret;
case 16:
__put_user_asm(*(u64*)src,(u64 __user *)dst,ret,"q","","ir",16);
if (unlikely(ret)) return ret;
__put_user_asm(*(u64 *)src, (u64 __user *)dst,
ret, "q", "", "ir", 16);
if (unlikely(ret))
return ret;
asm("":::"memory");
__put_user_asm(1[(u64*)src],1+(u64 __user *)dst,ret,"q","","ir",8);
return ret;
__put_user_asm(1[(u64 *)src], 1 + (u64 __user *)dst,
ret, "q", "", "ir", 8);
return ret;
default:
return copy_user_generic((__force void *)dst,src,size);
return copy_user_generic((__force void *)dst, src, size);
}
}
}
static __always_inline __must_check
int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
{
{
int ret = 0;
if (!__builtin_constant_p(size))
return copy_user_generic((__force void *)dst,(__force void *)src,size);
switch (size) {
case 1: {
return copy_user_generic((__force void *)dst,
(__force void *)src, size);
switch (size) {
case 1: {
u8 tmp;
__get_user_asm(tmp,(u8 __user *)src,ret,"b","b","=q",1);
__get_user_asm(tmp, (u8 __user *)src,
ret, "b", "b", "=q", 1);
if (likely(!ret))
__put_user_asm(tmp,(u8 __user *)dst,ret,"b","b","iq",1);
__put_user_asm(tmp, (u8 __user *)dst,
ret, "b", "b", "iq", 1);
return ret;
}
case 2: {
case 2: {
u16 tmp;
__get_user_asm(tmp,(u16 __user *)src,ret,"w","w","=r",2);
__get_user_asm(tmp, (u16 __user *)src,
ret, "w", "w", "=r", 2);
if (likely(!ret))
__put_user_asm(tmp,(u16 __user *)dst,ret,"w","w","ir",2);
__put_user_asm(tmp, (u16 __user *)dst,
ret, "w", "w", "ir", 2);
return ret;
}
case 4: {
case 4: {
u32 tmp;
__get_user_asm(tmp,(u32 __user *)src,ret,"l","k","=r",4);
__get_user_asm(tmp, (u32 __user *)src,
ret, "l", "k", "=r", 4);
if (likely(!ret))
__put_user_asm(tmp,(u32 __user *)dst,ret,"l","k","ir",4);
__put_user_asm(tmp, (u32 __user *)dst,
ret, "l", "k", "ir", 4);
return ret;
}
case 8: {
case 8: {
u64 tmp;
__get_user_asm(tmp,(u64 __user *)src,ret,"q","","=r",8);
__get_user_asm(tmp, (u64 __user *)src,
ret, "q", "", "=r", 8);
if (likely(!ret))
__put_user_asm(tmp,(u64 __user *)dst,ret,"q","","ir",8);
__put_user_asm(tmp, (u64 __user *)dst,
ret, "q", "", "ir", 8);
return ret;
}
default:
return copy_user_generic((__force void *)dst,(__force void *)src,size);
return copy_user_generic((__force void *)dst,
(__force void *)src, size);
}
}
}
__must_check long
__must_check long
strncpy_from_user(char *dst, const char __user *src, long count);
__must_check long
__must_check long
__strncpy_from_user(char *dst, const char __user *src, long count);
__must_check long strnlen_user(const char __user *str, long n);
__must_check long __strnlen_user(const char __user *str, long n);
......@@ -355,7 +428,8 @@ __must_check long strlen_user(const char __user *str);
__must_check unsigned long clear_user(void __user *mem, unsigned long len);
__must_check unsigned long __clear_user(void __user *mem, unsigned long len);
__must_check long __copy_from_user_inatomic(void *dst, const void __user *src, unsigned size);
__must_check long __copy_from_user_inatomic(void *dst, const void __user *src,
unsigned size);
static __must_check __always_inline int
__copy_to_user_inatomic(void __user *dst, const void *src, unsigned size)
......@@ -364,15 +438,19 @@ __copy_to_user_inatomic(void __user *dst, const void *src, unsigned size)
}
#define ARCH_HAS_NOCACHE_UACCESS 1
extern long __copy_user_nocache(void *dst, const void __user *src, unsigned size, int zerorest);
extern long __copy_user_nocache(void *dst, const void __user *src,
unsigned size, int zerorest);
static inline int __copy_from_user_nocache(void *dst, const void __user *src, unsigned size)
static inline int __copy_from_user_nocache(void *dst, const void __user *src,
unsigned size)
{
might_sleep();
return __copy_user_nocache(dst, src, size, 1);
}
static inline int __copy_from_user_inatomic_nocache(void *dst, const void __user *src, unsigned size)
static inline int __copy_from_user_inatomic_nocache(void *dst,
const void __user *src,
unsigned size)
{
return __copy_user_nocache(dst, src, size, 0);
}
......
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