waterDataFluctuationCorrelation rtuDataOperationAnalysis.h 朱涛 commit at 2021-03-12

waterDataFluctuationCorrelation/fluctuationCorrelationOfSprayEnd/rtuDataOperationAnalysis.h

@@ -995,3 +995,54 @@ __strncpy_from_user(char *__to, const char __user *__from, long __len)
 		"move\t$6, %3\n\t"
 		__MODULE_JAL(__strncpy_from_user_nocheck_asm)
 		"move\t%0, $2"
+		: "=r" (res)
+		: "r" (__to), "r" (__from), "r" (__len)
+		: "$2", "$3", "$4", "$5", "$6", __UA_t0, "$31", "memory");
+
+	return res;
+}
+
+/*
+ * strncpy_from_user: - Copy a NUL terminated string from userspace.
+ * @dst:   Destination address, in kernel space.  This buffer must be at
+ *         least @count bytes long.
+ * @src:   Source address, in user space.
+ * @count: Maximum number of bytes to copy, including the trailing NUL.
+ *
+ * Copies a NUL-terminated string from userspace to kernel space.
+ *
+ * On success, returns the length of the string (not including the trailing
+ * NUL).
+ *
+ * If access to userspace fails, returns -EFAULT (some data may have been
+ * copied).
+ *
+ * If @count is smaller than the length of the string, copies @count bytes
+ * and returns @count.
+ */
+static inline long
+strncpy_from_user(char *__to, const char __user *__from, long __len)
+{
+	long res;
+
+	might_fault();
+	__asm__ __volatile__(
+		"move\t$4, %1\n\t"
+		"move\t$5, %2\n\t"
+		"move\t$6, %3\n\t"
+		__MODULE_JAL(__strncpy_from_user_asm)
+		"move\t%0, $2"
+		: "=r" (res)
+		: "r" (__to), "r" (__from), "r" (__len)
+		: "$2", "$3", "$4", "$5", "$6", __UA_t0, "$31", "memory");
+
+	return res;
+}
+
+/* Returns: 0 if bad, string length+1 (memory size) of string if ok */
+static inline long __strlen_user(const char __user *s)
+{
+	long res;
+
+	might_fault();
+	__asm__ __volatile__(