#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)
/*
* movsl can be slow when source and dest are not both 8-byte aligned
} ____cacheline_aligned_in_smp movsl_mask;
#endif
-#define __addr_ok(addr) ((unsigned long __force)(addr) < (current_thread_info()->addr_limit.seg))
+#define __addr_ok(addr) \
+ ((unsigned long __force)(addr) < \
+ (current_thread_info()->addr_limit.seg))
/*
* Test whether a block of memory is a valid user space address.
*
* This needs 33-bit arithmetic. We have a carry...
*/
-#define __range_ok(addr,size) ({ \
- unsigned long flag,roksum; \
- __chk_user_ptr(addr); \
- asm("addl %3,%1 ; sbbl %0,%0; cmpl %1,%4; sbbl $0,%0" \
- :"=&r" (flag), "=r" (roksum) \
- :"1" (addr),"g" ((int)(size)),"rm" (current_thread_info()->addr_limit.seg)); \
- flag; })
+#define __range_ok(addr, size) \
+({ \
+ unsigned long flag, roksum; \
+ __chk_user_ptr(addr); \
+ asm("addl %3,%1 ; sbbl %0,%0; cmpl %1,%4; sbbl $0,%0" \
+ :"=&r" (flag), "=r" (roksum) \
+ :"1" (addr), "g" ((int)(size)), \
+ "rm" (current_thread_info()->addr_limit.seg)); \
+ flag; \
+})
/**
* access_ok: - Checks if a user space pointer is valid
* checks that the pointer is in the user space range - after calling
* this function, memory access functions may still return -EFAULT.
*/
-#define access_ok(type,addr,size) (likely(__range_ok(addr,size) == 0))
+#define access_ok(type, addr, size) (likely(__range_ok(addr, size) == 0))
/*
* The exception table consists of pairs of addresses: the first is the
* on our cache or tlb entries.
*/
-struct exception_table_entry
-{
+struct exception_table_entry {
unsigned long insn, fixup;
};
extern void __get_user_2(void);
extern void __get_user_4(void);
-#define __get_user_x(size,ret,x,ptr) \
- __asm__ __volatile__("call __get_user_" #size \
- :"=a" (ret),"=d" (x) \
- :"0" (ptr))
+#define __get_user_x(size, ret, x, ptr) \
+ asm volatile("call __get_user_" #size \
+ :"=a" (ret),"=d" (x) \
+ :"0" (ptr))
+
+/* 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 */
/**
* get_user: - Get a simple variable from user space.
* @x: Variable to store result.
* Returns zero on success, or -EFAULT on error.
* On error, the variable @x is set to zero.
*/
-#define get_user(x,ptr) \
-({ int __ret_gu; \
+#define get_user(x, ptr) \
+({ \
+ int __ret_gu; \
unsigned long __val_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; \
- default: __get_user_x(X,__ret_gu,__val_gu,ptr); 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; \
+ default: \
+ __get_user_x(X, __ret_gu, __val_gu, ptr); \
+ break; \
} \
(x) = (__typeof__(*(ptr)))__val_gu; \
__ret_gu; \
extern void __put_user_4(void);
extern void __put_user_8(void);
-#define __put_user_1(x, ptr) __asm__ __volatile__("call __put_user_1":"=a" (__ret_pu):"0" ((typeof(*(ptr)))(x)), "c" (ptr))
-#define __put_user_2(x, ptr) __asm__ __volatile__("call __put_user_2":"=a" (__ret_pu):"0" ((typeof(*(ptr)))(x)), "c" (ptr))
-#define __put_user_4(x, ptr) __asm__ __volatile__("call __put_user_4":"=a" (__ret_pu):"0" ((typeof(*(ptr)))(x)), "c" (ptr))
-#define __put_user_8(x, ptr) __asm__ __volatile__("call __put_user_8":"=a" (__ret_pu):"A" ((typeof(*(ptr)))(x)), "c" (ptr))
-#define __put_user_X(x, ptr) __asm__ __volatile__("call __put_user_X":"=a" (__ret_pu):"c" (ptr))
+#define __put_user_1(x, ptr) \
+ asm volatile("call __put_user_1" : "=a" (__ret_pu) \
+ : "0" ((typeof(*(ptr)))(x)), "c" (ptr))
+
+#define __put_user_2(x, ptr) \
+ asm volatile("call __put_user_2" : "=a" (__ret_pu) \
+ : "0" ((typeof(*(ptr)))(x)), "c" (ptr))
+
+#define __put_user_4(x, ptr) \
+ asm volatile("call __put_user_4" : "=a" (__ret_pu) \
+ : "0" ((typeof(*(ptr)))(x)), "c" (ptr))
+
+#define __put_user_8(x, ptr) \
+ asm volatile("call __put_user_8" : "=a" (__ret_pu) \
+ : "A" ((typeof(*(ptr)))(x)), "c" (ptr))
+
+#define __put_user_X(x, ptr) \
+ asm volatile("call __put_user_X" : "=a" (__ret_pu) \
+ : "c" (ptr))
/**
* put_user: - Write a simple value into user space.
*/
#ifdef CONFIG_X86_WP_WORKS_OK
-#define put_user(x,ptr) \
-({ int __ret_pu; \
+#define put_user(x, ptr) \
+({ \
+ int __ret_pu; \
__typeof__(*(ptr)) __pu_val; \
__chk_user_ptr(ptr); \
__pu_val = x; \
- switch(sizeof(*(ptr))) { \
- case 1: __put_user_1(__pu_val, ptr); break; \
- case 2: __put_user_2(__pu_val, ptr); break; \
- case 4: __put_user_4(__pu_val, ptr); break; \
- case 8: __put_user_8(__pu_val, ptr); break; \
- default:__put_user_X(__pu_val, ptr); break; \
+ switch (sizeof(*(ptr))) { \
+ case 1: \
+ __put_user_1(__pu_val, ptr); \
+ break; \
+ case 2: \
+ __put_user_2(__pu_val, ptr); \
+ break; \
+ case 4: \
+ __put_user_4(__pu_val, ptr); \
+ break; \
+ case 8: \
+ __put_user_8(__pu_val, ptr); \
+ break; \
+ default: \
+ __put_user_X(__pu_val, ptr); \
+ break; \
} \
__ret_pu; \
})
#else
-#define put_user(x,ptr) \
+#define put_user(x, ptr) \
({ \
- int __ret_pu; \
- __typeof__(*(ptr)) __pus_tmp = x; \
- __ret_pu=0; \
- if(unlikely(__copy_to_user_ll(ptr, &__pus_tmp, \
- sizeof(*(ptr))) != 0)) \
- __ret_pu=-EFAULT; \
- __ret_pu; \
- })
+ int __ret_pu; \
+ __typeof__(*(ptr))__pus_tmp = x; \
+ __ret_pu = 0; \
+ if (unlikely(__copy_to_user_ll(ptr, &__pus_tmp, \
+ sizeof(*(ptr))) != 0)) \
+ __ret_pu = -EFAULT; \
+ __ret_pu; \
+})
#endif
* Returns zero on success, or -EFAULT on error.
* On error, the variable @x is set to zero.
*/
-#define __get_user(x,ptr) \
- __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __get_user(x, ptr) \
+ __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
/**
*
* Returns zero on success, or -EFAULT on error.
*/
-#define __put_user(x,ptr) \
- __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+#define __put_user(x, ptr) \
+ __put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-#define __put_user_nocheck(x,ptr,size) \
+#define __put_user_nocheck(x, ptr, size) \
({ \
long __pu_err; \
- __put_user_size((x),(ptr),(size),__pu_err,-EFAULT); \
+ __put_user_size((x), (ptr), (size), __pu_err, -EFAULT); \
__pu_err; \
})
-#define __put_user_u64(x, addr, err) \
- __asm__ __volatile__( \
- "1: movl %%eax,0(%2)\n" \
- "2: movl %%edx,4(%2)\n" \
- "3:\n" \
- ".section .fixup,\"ax\"\n" \
- "4: movl %3,%0\n" \
- " jmp 3b\n" \
- ".previous\n" \
- _ASM_EXTABLE(1b,4b) \
- _ASM_EXTABLE(2b,4b) \
- : "=r"(err) \
- : "A" (x), "r" (addr), "i"(-EFAULT), "0"(err))
+#define __put_user_u64(x, addr, err) \
+ asm volatile("1: movl %%eax,0(%2)\n" \
+ "2: movl %%edx,4(%2)\n" \
+ "3:\n" \
+ ".section .fixup,\"ax\"\n" \
+ "4: movl %3,%0\n" \
+ " jmp 3b\n" \
+ ".previous\n" \
+ _ASM_EXTABLE(1b, 4b) \
+ _ASM_EXTABLE(2b, 4b) \
+ : "=r" (err) \
+ : "A" (x), "r" (addr), "i" (-EFAULT), "0" (err))
#ifdef CONFIG_X86_WP_WORKS_OK
-#define __put_user_size(x,ptr,size,retval,errret) \
+#define __put_user_size(x, ptr, size, retval, errret) \
do { \
retval = 0; \
__chk_user_ptr(ptr); \
switch (size) { \
- case 1: __put_user_asm(x,ptr,retval,"b","b","iq",errret);break; \
- case 2: __put_user_asm(x,ptr,retval,"w","w","ir",errret);break; \
- case 4: __put_user_asm(x,ptr,retval,"l","","ir",errret); break; \
- case 8: __put_user_u64((__typeof__(*ptr))(x),ptr,retval); break;\
- default: __put_user_bad(); \
+ case 1: \
+ __put_user_asm(x, ptr, retval, "b", "b", "iq", errret); \
+ break; \
+ case 2: \
+ __put_user_asm(x, ptr, retval, "w", "w", "ir", errret); \
+ break; \
+ case 4: \
+ __put_user_asm(x, ptr, retval, "l", "", "ir", errret); \
+ break; \
+ case 8: \
+ __put_user_u64((__typeof__(*ptr))(x), ptr, retval); \
+ break; \
+ default: \
+ __put_user_bad(); \
} \
} while (0)
#else
-#define __put_user_size(x,ptr,size,retval,errret) \
+#define __put_user_size(x, ptr, size, retval, errret) \
do { \
- __typeof__(*(ptr)) __pus_tmp = x; \
+ __typeof__(*(ptr))__pus_tmp = x; \
retval = 0; \
\
- if(unlikely(__copy_to_user_ll(ptr, &__pus_tmp, size) != 0)) \
+ if (unlikely(__copy_to_user_ll(ptr, &__pus_tmp, size) != 0)) \
retval = errret; \
} while (0)
* aliasing issues.
*/
#define __put_user_asm(x, addr, err, itype, rtype, ltype, errret) \
- __asm__ __volatile__( \
- "1: mov"itype" %"rtype"1,%2\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: movl %3,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- _ASM_EXTABLE(1b,3b) \
- : "=r"(err) \
- : ltype (x), "m"(__m(addr)), "i"(errret), "0"(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) = (__typeof__(*(ptr)))__gu_val; \
- __gu_err; \
+ asm volatile("1: mov"itype" %"rtype"1,%2\n" \
+ "2:\n" \
+ ".section .fixup,\"ax\"\n" \
+ "3: movl %3,%0\n" \
+ " jmp 2b\n" \
+ ".previous\n" \
+ _ASM_EXTABLE(1b, 3b) \
+ : "=r"(err) \
+ : ltype (x), "m" (__m(addr)), "i" (errret), "0" (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) = (__typeof__(*(ptr)))__gu_val; \
+ __gu_err; \
})
extern long __get_user_bad(void);
-#define __get_user_size(x,ptr,size,retval,errret) \
+#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(); \
+ 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(void *to,
- const void __user *from, unsigned long n);
-unsigned long __must_check __copy_from_user_ll_nozero(void *to,
- const void __user *from, unsigned long n);
-unsigned long __must_check __copy_from_user_ll_nocache(void *to,
- const void __user *from, unsigned long n);
-unsigned long __must_check __copy_from_user_ll_nocache_nozero(void *to,
- const void __user *from, unsigned long n);
+ 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
+ (void *to, const void __user *from, unsigned long n);
+unsigned long __must_check __copy_from_user_ll_nozero
+ (void *to, const void __user *from, unsigned long n);
+unsigned long __must_check __copy_from_user_ll_nocache
+ (void *to, const void __user *from, unsigned long n);
+unsigned long __must_check __copy_from_user_ll_nocache_nozero
+ (void *to, const void __user *from, unsigned long n);
/**
* __copy_to_user_inatomic: - Copy a block of data into user space, with less checking.
switch (n) {
case 1:
- __put_user_size(*(u8 *)from, (u8 __user *)to, 1, ret, 1);
+ __put_user_size(*(u8 *)from, (u8 __user *)to,
+ 1, ret, 1);
return ret;
case 2:
- __put_user_size(*(u16 *)from, (u16 __user *)to, 2, ret, 2);
+ __put_user_size(*(u16 *)from, (u16 __user *)to,
+ 2, ret, 2);
return ret;
case 4:
- __put_user_size(*(u32 *)from, (u32 __user *)to, 4, ret, 4);
+ __put_user_size(*(u32 *)from, (u32 __user *)to,
+ 4, ret, 4);
return ret;
}
}
}
static __always_inline unsigned long
-__copy_from_user_inatomic_nocache(void *to, const void __user *from, unsigned long n)
+__copy_from_user_inatomic_nocache(void *to, const void __user *from,
+ unsigned long n)
{
return __copy_from_user_ll_nocache_nozero(to, from, n);
}
unsigned long __must_check copy_to_user(void __user *to,
- const void *from, unsigned long n);
+ const void *from, unsigned long n);
unsigned long __must_check copy_from_user(void *to,
- const void __user *from, unsigned long n);
+ const void __user *from,
+ unsigned long n);
long __must_check strncpy_from_user(char *dst, const char __user *src,
- long count);
+ long count);
long __must_check __strncpy_from_user(char *dst,
- const char __user *src, long count);
+ const char __user *src, long count);
/**
* strlen_user: - Get the size of a string in user space.
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff