#include <xen/string.h>
#include <xen/sched.h>
-/* No user-pointer checking. */
#define __user
-#define __chk_user_ptr(_p) ((void)0)
#define VERIFY_READ 0
#define VERIFY_WRITE 1
*/
#ifdef CONFIG_X86_INTEL_USERCOPY
extern struct movsl_mask {
- int mask;
+ int mask;
} __cacheline_aligned movsl_mask;
#endif
*
* This is equivalent to the following test:
* (u33)addr + (u33)size >= (u33)HYPERVISOR_VIRT_START
- *
- * This needs 33-bit arithmetic. We have a carry...
*/
-#define __range_ok(addr,size) ({ \
+#define __range_not_ok(addr,size) ({ \
unsigned long flag,sum; \
- __chk_user_ptr(addr); \
asm("addl %3,%1 ; sbbl %0,%0; cmpl %1,%4; sbbl $0,%0" \
:"=&r" (flag), "=r" (sum) \
:"1" (addr),"g" ((int)(size)),"r" (HYPERVISOR_VIRT_START)); \
flag; })
-/**
- * access_ok: - Checks if a user space pointer is valid
- * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE. Note that
- * %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe
- * to write to a block, it is always safe to read from it.
- * @addr: User space pointer to start of block to check
- * @size: Size of block to check
- *
- * Context: User context only. This function may sleep.
- *
- * Checks if a pointer to a block of memory in user space is valid.
- *
- * Returns true (nonzero) if the memory block may be valid, false (zero)
- * if it is definitely invalid.
- *
- * Note that, depending on architecture, this function probably just
- * 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_not_ok(addr,size) == 0))
#define array_access_ok(type,addr,count,size) \
(likely(count < (~0UL/size)) && access_ok(type,addr,count*size))
+extern long __get_user_bad(void);
+extern void __put_user_bad(void);
+
/**
* get_user: - Get a simple variable from user space.
* @x: Variable to store result.
#define get_user(x,ptr) \
__get_user_check((x),(ptr),sizeof(*(ptr)))
-extern void __put_user_bad(void);
-
/**
* put_user: - Write a simple value into user space.
* @x: Value to copy to user space.
#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; \
__gu_err; \
})
-extern long __get_user_bad(void);
-
#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; \
static always_inline unsigned long
__copy_to_user(void __user *to, const void *from, unsigned long n)
{
- if (__builtin_constant_p(n)) {
- unsigned long ret;
-
- switch (n) {
- case 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);
- return ret;
- case 4:
- __put_user_size(*(u32 *)from, (u32 __user *)to, 4, ret, 4);
- return ret;
- }
- }
- return __copy_to_user_ll(to, from, n);
+ if (__builtin_constant_p(n)) {
+ unsigned long ret;
+
+ switch (n) {
+ case 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);
+ return ret;
+ case 4:
+ __put_user_size(*(u32 *)from, (u32 __user *)to, 4, ret, 4);
+ return ret;
+ }
+ }
+ return __copy_to_user_ll(to, from, n);
}
/**
static always_inline unsigned long
__copy_from_user(void *to, const void __user *from, unsigned long n)
{
- if (__builtin_constant_p(n)) {
- unsigned long ret;
-
- switch (n) {
- case 1:
- __get_user_size(*(u8 *)to, from, 1, ret, 1);
- return ret;
- case 2:
- __get_user_size(*(u16 *)to, from, 2, ret, 2);
- return ret;
- case 4:
- __get_user_size(*(u32 *)to, from, 4, ret, 4);
- return ret;
- }
- }
- return __copy_from_user_ll(to, from, n);
+ if (__builtin_constant_p(n)) {
+ unsigned long ret;
+
+ switch (n) {
+ case 1:
+ __get_user_size(*(u8 *)to, from, 1, ret, 1);
+ return ret;
+ case 2:
+ __get_user_size(*(u16 *)to, from, 2, ret, 2);
+ return ret;
+ case 4:
+ __get_user_size(*(u32 *)to, from, 4, ret, 4);
+ return ret;
+ }
+ }
+ return __copy_from_user_ll(to, from, n);
}
unsigned long copy_to_user(void __user *to, const void *from, unsigned long n);
unsigned long copy_from_user(void *to,
- const void __user *from, unsigned long n);
-long strncpy_from_user(char *dst, const char __user *src, long count);
-long __strncpy_from_user(char *dst, const char __user *src, long count);
-
-/**
- * strlen_user: - Get the size of a string in user space.
- * @str: The string to measure.
- *
- * Context: User context only. This function may sleep.
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- *
- * If there is a limit on the length of a valid string, you may wish to
- * consider using strnlen_user() instead.
- */
-#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
+ const void __user *from, unsigned long n);
-long strnlen_user(const char __user *str, long n);
unsigned long clear_user(void __user *mem, unsigned long len);
unsigned long __clear_user(void __user *mem, unsigned long len);
#include <xen/prefetch.h>
#include <asm/page.h>
-/* No user-pointer checking. */
#define __user
-#define __force
-#define __chk_user_ptr(_p) ((void)0)
#define VERIFY_READ 0
#define VERIFY_WRITE 1
#define __addr_ok(addr) ((unsigned long)(addr) < HYPERVISOR_VIRT_START)
/*
- * Uhhuh, this needs 65-bit arithmetic. We have a carry..
+ * Test whether a block of memory is a valid user space address.
+ * Returns 0 if the range is valid, nonzero otherwise.
+ *
+ * This is equivalent to the following test:
+ * ((u65)addr >= (u65)HYPERVISOR_VIRT_END) ?
+ * (((u65)addr + (u65)size) >= ((u65)1 << 64)) :
+ * (((u65)addr + (u65)size) >= ((u65)HYPERVISOR_VIRT_START))
*/
#define __range_not_ok(addr,size) ({ \
- unsigned long flag,sum; \
- __chk_user_ptr(addr); \
- asm("# range_ok\n\r" \
- "addq %3,%1 ; sbbq %0,%0 ; cmpq %1,%4 ; sbbq $0,%0" \
- :"=&r" (flag), "=r" (sum) \
- :"1" (addr),"g" ((long)(size)),"r" (HYPERVISOR_VIRT_START)); \
- flag; })
+ unsigned long flag,sum; \
+ if ((unsigned long)addr >= HYPERVISOR_VIRT_END) \
+ asm("addq %3,%1 ; sbbq %0,%0" \
+ :"=&r" (flag), "=r" (sum) \
+ :"1" (addr),"g" ((long)(size))); \
+ else \
+ asm("addq %3,%1 ; sbbq %0,%0 ; cmpq %1,%4 ; sbbq $0,%0" \
+ :"=&r" (flag), "=r" (sum) \
+ :"1" (addr),"g" ((long)(size)),"r" (HYPERVISOR_VIRT_START)); \
+ flag; })
#define access_ok(type, addr, size) (__range_not_ok(addr,size) == 0)
#define array_access_ok(type,addr,count,size) \
(likely(sizeof(count) <= 4) /* disallow 64-bit counts */ && \
- access_ok(type,addr,count*size))
+ access_ok(type,addr,(unsigned long)count*(unsigned long)size))
-extern inline int verify_area(int type, const void __user * addr, unsigned long size)
-{
- return access_ok(type,addr,size) ? 0 : -EFAULT;
-}
+extern long __get_user_bad(void);
+extern void __put_user_bad(void);
-/*
- * These are the main single-value transfer routines. They automatically
- * use the right size if we just have the right pointer type.
+/**
+ * get_user: - Get a simple variable from user space.
+ * @x: Variable to store result.
+ * @ptr: Source address, in user space.
*
- * This gets kind of ugly. We want to return _two_ values in "get_user()"
- * and yet we don't want to do any pointers, because that is too much
- * of a performance impact. Thus we have a few rather ugly macros here,
- * and hide all the ugliness from the user.
+ * Context: User context only. This function may sleep.
*
- * The "__xxx" versions of the user access functions are versions that
- * do not verify the address space, that must have been done previously
- * with a separate "access_ok()" call (this is used when we do multiple
- * accesses to the same area of user memory).
+ * This macro copies a single simple variable from user space to kernel
+ * space. It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and the result of
+ * dereferencing @ptr must be assignable to @x without a cast.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ * On error, the variable @x is set to zero.
*/
+#define get_user(x,ptr) \
+ __get_user_check((x),(ptr),sizeof(*(ptr)))
-extern void __get_user_1(void);
-extern void __get_user_2(void);
-extern void __get_user_4(void);
-extern void __get_user_8(void);
-
-#define __get_user_x(size,ret,x,ptr) \
- __asm__ __volatile__("call __get_user_" #size \
- :"=a" (ret),"=d" (x) \
- :"0" (ptr) \
- :"rbx")
-
-/* Careful: we have to cast the result to the type of the pointer for sign reasons */
-#define get_user(x,ptr) \
-({ 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; \
- } \
- (x) = (__typeof__(*(ptr)))__val_gu; \
- __ret_gu; \
-})
-
-extern void __put_user_1(void);
-extern void __put_user_2(void);
-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) \
- :"0" (ptr),"d" (x) \
- :"rbx")
-
+/**
+ * put_user: - Write a simple value into user space.
+ * @x: Value to copy to user space.
+ * @ptr: Destination address, in user space.
+ *
+ * Context: User context only. This function may sleep.
+ *
+ * This macro copies a single simple value from kernel space to user
+ * space. It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and @x must be assignable
+ * to the result of dereferencing @ptr.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ */
#define put_user(x,ptr) \
__put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+
+/**
+ * __get_user: - Get a simple variable from user space, with less checking.
+ * @x: Variable to store result.
+ * @ptr: Source address, in user space.
+ *
+ * Context: User context only. This function may sleep.
+ *
+ * This macro copies a single simple variable from user space to kernel
+ * space. It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and the result of
+ * dereferencing @ptr must be assignable to @x without a cast.
+ *
+ * Caller must check the pointer with access_ok() before calling this
+ * function.
+ *
+ * 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)))
+
+
+/**
+ * __put_user: - Write a simple value into user space, with less checking.
+ * @x: Value to copy to user space.
+ * @ptr: Destination address, in user space.
+ *
+ * Context: User context only. This function may sleep.
+ *
+ * This macro copies a single simple value from kernel space to user
+ * space. It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and @x must be assignable
+ * to the result of dereferencing @ptr.
+ *
+ * Caller must check the pointer with access_ok() before calling this
+ * function.
+ *
+ * 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_nocheck(x,ptr,size) \
-({ \
- int __pu_err; \
- __put_user_size((x),(ptr),(size),__pu_err); \
- __pu_err; \
+#define __put_user_nocheck(x,ptr,size) \
+({ \
+ long __pu_err; \
+ __put_user_size((x),(ptr),(size),__pu_err,-EFAULT); \
+ __pu_err; \
})
+#define __put_user_check(x,ptr,size) \
+({ \
+ long __pu_err = -EFAULT; \
+ __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
+ if (__addr_ok(__pu_addr)) \
+ __put_user_size((x),__pu_addr,(size),__pu_err,-EFAULT); \
+ __pu_err; \
+})
-#define __put_user_check(x,ptr,size) \
-({ \
- int __pu_err = -EFAULT; \
- __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- if (likely(access_ok(VERIFY_WRITE,__pu_addr,size))) \
- __put_user_size((x),__pu_addr,(size),__pu_err); \
- __pu_err; \
-})
-
-#define __put_user_size(x,ptr,size,retval) \
+#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",-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","","ir",-EFAULT); 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","k","ir",errret);break; \
+ case 8: __put_user_asm(x,ptr,retval,"q","","ir",errret);break; \
+ default: __put_user_bad(); \
} \
} while (0)
-/* FIXME: this hack is definitely wrong -AK */
struct __large_struct { unsigned long buf[100]; };
#define __m(x) (*(struct __large_struct *)(x))
* we do not write to any memory gcc knows about, so there are no
* 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" \
- ".section __ex_table,\"a\"\n" \
- " .align 8\n" \
- " .quad 1b,3b\n" \
- ".previous" \
- : "=r"(err) \
- : ltype (x), "m"(__m(addr)), "i"(errno), "0"(err))
-
+#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: mov %3,%0\n" \
+ " jmp 2b\n" \
+ ".previous\n" \
+ ".section __ex_table,\"a\"\n" \
+ " .align 8\n" \
+ " .quad 1b,3b\n" \
+ ".previous" \
+ : "=r"(err) \
+ : ltype (x), "m"(__m(addr)), "i"(errret), "0"(err))
#define __get_user_nocheck(x,ptr,size) \
({ \
- int __gu_err; \
- long __gu_val; \
- __get_user_size(__gu_val,(ptr),(size),__gu_err); \
+ long __gu_err, __gu_val; \
+ __get_user_size(__gu_val,(ptr),(size),__gu_err,-EFAULT);\
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
-extern int __get_user_bad(void);
-
-#define __get_user_size(x,ptr,size,retval) \
+#define __get_user_check(x,ptr,size) \
+({ \
+ long __gu_err, __gu_val; \
+ __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
+ __get_user_size(__gu_val,__gu_addr,(size),__gu_err,-EFAULT); \
+ (x) = (__typeof__(*(ptr)))__gu_val; \
+ if (!__addr_ok(__gu_addr)) __gu_err = -EFAULT; \
+ __gu_err; \
+})
+
+#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",-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",errret);break; \
+ case 2: __get_user_asm(x,ptr,retval,"w","w","=r",errret);break; \
+ case 4: __get_user_asm(x,ptr,retval,"l","k","=r",errret);break; \
+ case 8: __get_user_asm(x,ptr,retval,"q","","=r",errret); 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" \
- ".section __ex_table,\"a\"\n" \
- " .align 8\n" \
- " .quad 1b,3b\n" \
- ".previous" \
- : "=r"(err), ltype (x) \
- : "m"(__m(addr)), "i"(errno), "0"(err))
+#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: mov %3,%0\n" \
+ " xor"itype" %"rtype"1,%"rtype"1\n" \
+ " jmp 2b\n" \
+ ".previous\n" \
+ ".section __ex_table,\"a\"\n" \
+ " .align 8\n" \
+ " .quad 1b,3b\n" \
+ ".previous" \
+ : "=r"(err), ltype (x) \
+ : "m"(__m(addr)), "i"(errret), "0"(err))
+
/*
* Copy To/From Userspace
*/
/* Handles exceptions in both to and from, but doesn't do access_ok */
-extern unsigned long copy_user_generic(void *to, const void *from, unsigned len);
+unsigned long __copy_to_user_ll(void __user *to, const void *from, unsigned n);
+unsigned long __copy_from_user_ll(void *to, const void __user *from, unsigned n);
-extern unsigned long copy_to_user(void __user *to, const void *from, unsigned len);
-extern unsigned long copy_from_user(void *to, const void __user *from, unsigned len);
-extern unsigned long copy_in_user(void __user *to, const void __user *from, unsigned len);
+unsigned long copy_to_user(void __user *to, const void *from, unsigned len);
+unsigned long copy_from_user(void *to, const void __user *from, unsigned len);
static always_inline 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 ret;
- 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);
- 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;
- 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;
- default:
- return copy_user_generic(dst,(__force void *)src,size);
- }
+ int ret = 0;
+ if (!__builtin_constant_p(size))
+ return __copy_from_user_ll(dst,(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);
+ return ret;
+ 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 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;
+ 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;
+ default:
+ return __copy_from_user_ll(dst,(void *)src,size);
+ }
}
static always_inline 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 ret;
- 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);
- 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;
- asm("":::"memory");
- __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;
- asm("":::"memory");
- __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);
- }
-}
-
-
-static always_inline 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: {
- u8 tmp;
- __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);
- return ret;
- }
- case 2: {
- u16 tmp;
- __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);
- return ret;
- }
-
- case 4: {
- u32 tmp;
- __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);
- return ret;
- }
- case 8: {
- u64 tmp;
- __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);
- return ret;
- }
- default:
- return copy_user_generic((__force void *)dst,(__force void *)src,size);
- }
+ int ret = 0;
+ if (!__builtin_constant_p(size))
+ return __copy_to_user_ll((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);
+ return ret;
+ 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 10:
+ __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;
+ case 16:
+ __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;
+ default:
+ return __copy_to_user_ll((void *)dst,src,size);
+ }
}
-long strncpy_from_user(char *dst, const char __user *src, long count);
-long __strncpy_from_user(char *dst, const char __user *src, long count);
-long strnlen_user(const char __user *str, long n);
-long strlen_user(const char __user *str);
unsigned long clear_user(void __user *mem, unsigned long len);
unsigned long __clear_user(void __user *mem, unsigned long len);
projects / xen.git / commitdiff