waterDataFluctuationCorrelation dataOperationOfSprayTerminal.h 袁明明 commit at 2021-02-22

waterDataFluctuationCorrelation/databaseOperation/dataOperationOfSprayTerminal.h

@@ -266,3 +266,150 @@ do {									\
 		"	.long 1b,3b\n"					\
 		".previous"						\
 		: "=&r" (err), "=&r" (x)				\
+		: "r" (addr), "i" (-EFAULT), "0" (err)			\
+		: "r14", "memory")
+
+/**
+ * __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)					\
+({									\
+	long __pu_err;							\
+	might_sleep();							\
+	__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);			\
+	might_sleep();							\
+	if (access_ok(VERIFY_WRITE,__pu_addr,size))			\
+		__put_user_size((x),__pu_addr,(size),__pu_err);		\
+	__pu_err;							\
+})
+
+#if defined(__LITTLE_ENDIAN__)
+#define __put_user_u64(x, addr, err)					\
+        __asm__ __volatile__(						\
+                "       .fillinsn\n"					\
+                "1:     st %L1,@%2\n"					\
+                "       .fillinsn\n"					\
+                "2:     st %H1,@(4,%2)\n"				\
+                "       .fillinsn\n"					\
+                "3:\n"							\
+                ".section .fixup,\"ax\"\n"				\
+                "       .balign 4\n"					\
+                "4:     ldi %0,%3\n"					\
+                "       seth r14,#high(3b)\n"				\
+                "       or3 r14,r14,#low(3b)\n"				\
+                "       jmp r14\n"					\
+                ".previous\n"						\
+                ".section __ex_table,\"a\"\n"				\
+                "       .balign 4\n"					\
+                "       .long 1b,4b\n"					\
+                "       .long 2b,4b\n"					\
+                ".previous"						\
+                : "=&r" (err)						\
+                : "r" (x), "r" (addr), "i" (-EFAULT), "0" (err)		\
+                : "r14", "memory")
+
+#elif defined(__BIG_ENDIAN__)
+#define __put_user_u64(x, addr, err)					\
+	__asm__ __volatile__(						\
+		"	.fillinsn\n"					\
+		"1:	st %H1,@%2\n"					\
+		"	.fillinsn\n"					\
+		"2:	st %L1,@(4,%2)\n"				\
+		"	.fillinsn\n"					\
+		"3:\n"							\
+		".section .fixup,\"ax\"\n"				\
+		"	.balign 4\n"					\
+		"4:	ldi %0,%3\n"					\
+		"	seth r14,#high(3b)\n"				\
+		"	or3 r14,r14,#low(3b)\n"				\
+		"	jmp r14\n"					\
+		".previous\n"						\
+		".section __ex_table,\"a\"\n"				\
+		"	.balign 4\n"					\
+		"	.long 1b,4b\n"					\
+		"	.long 2b,4b\n"					\
+		".previous"						\
+		: "=&r" (err)						\
+		: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err)		\
+		: "r14", "memory")
+#else
+#error no endian defined
+#endif
+
+extern void __put_user_bad(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,"h"); break;		\
+	  case 4: __put_user_asm(x,ptr,retval,""); break;		\
+	  case 8: __put_user_u64((__typeof__(*ptr))(x),ptr,retval); break;\
+	  default: __put_user_bad();					\
+	}								\
+} while (0)
+
+struct __large_struct { unsigned long buf[100]; };
+#define __m(x) (*(struct __large_struct *)(x))
+
+/*
+ * Tell gcc we read from memory instead of writing: this is because
+ * we do not write to any memory gcc knows about, so there are no
+ * aliasing issues.
+ */
+#define __put_user_asm(x, addr, err, itype)				\
+	__asm__ __volatile__(						\
+		"	.fillinsn\n"					\
+		"1:	st"itype" %1,@%2\n"				\
+		"	.fillinsn\n"					\
+		"2:\n"							\
+		".section .fixup,\"ax\"\n"				\
+		"	.balign 4\n"					\
+		"3:	ldi %0,%3\n"					\
+		"	seth r14,#high(2b)\n"				\
+		"	or3 r14,r14,#low(2b)\n"				\
+		"	jmp r14\n"					\
+		".previous\n"						\
+		".section __ex_table,\"a\"\n"				\
+		"	.balign 4\n"					\
+		"	.long 1b,3b\n"					\
+		".previous"						\
+		: "=&r" (err)						\
+		: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err)		\
+		: "r14", "memory")
+
+/*
+ * Here we special-case 1, 2 and 4-byte copy_*_user invocations.  On a fault
+ * we return the initial request size (1, 2 or 4), as copy_*_user should do.
+ * If a store crosses a page boundary and gets a fault, the m32r will not write
+ * anything, so this is accurate.