waterDataFluctuationCorrelation rtuDataOperationAnalysis.h 朱涛 commit at 2021-04-08

waterDataFluctuationCorrelation/fluctuationCorrelationOfSprayEnd/rtuDataOperationAnalysis.h

@@ -1046,3 +1046,101 @@ static inline long __strlen_user(const char __user *s)
 
 	might_fault();
 	__asm__ __volatile__(
+		"move\t$4, %1\n\t"
+		__MODULE_JAL(__strlen_user_nocheck_asm)
+		"move\t%0, $2"
+		: "=r" (res)
+		: "r" (s)
+		: "$2", "$4", __UA_t0, "$31");
+
+	return res;
+}
+
+/*
+ * 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.
+ */
+static inline long strlen_user(const char __user *s)
+{
+	long res;
+
+	might_fault();
+	__asm__ __volatile__(
+		"move\t$4, %1\n\t"
+		__MODULE_JAL(__strlen_user_asm)
+		"move\t%0, $2"
+		: "=r" (res)
+		: "r" (s)
+		: "$2", "$4", __UA_t0, "$31");
+
+	return res;
+}
+
+/* Returns: 0 if bad, string length+1 (memory size) of string if ok */
+static inline long __strnlen_user(const char __user *s, long n)
+{
+	long res;
+
+	might_fault();
+	__asm__ __volatile__(
+		"move\t$4, %1\n\t"
+		"move\t$5, %2\n\t"
+		__MODULE_JAL(__strnlen_user_nocheck_asm)
+		"move\t%0, $2"
+		: "=r" (res)
+		: "r" (s), "r" (n)
+		: "$2", "$4", "$5", __UA_t0, "$31");
+
+	return res;
+}
+
+/*
+ * 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.
+ */
+static inline long strnlen_user(const char __user *s, long n)
+{
+	long res;
+
+	might_fault();
+	__asm__ __volatile__(
+		"move\t$4, %1\n\t"
+		"move\t$5, %2\n\t"
+		__MODULE_JAL(__strnlen_user_asm)
+		"move\t%0, $2"
+		: "=r" (res)
+		: "r" (s), "r" (n)
+		: "$2", "$4", "$5", __UA_t0, "$31");
+
+	return res;
+}
+
+struct exception_table_entry
+{
+	unsigned long insn;
+	unsigned long nextinsn;
+};
+
+extern int fixup_exception(struct pt_regs *regs);
+
+#endif /* _ASM_UACCESS_H */