waterInvestigationHiddenDanger rtuDataOperation.h 李海忠 commit at 2021-03-09

waterInvestigationHiddenDanger/databaseOperation/rtuDataOperation.h

@@ -206,3 +206,196 @@ extern void __get_user_unknown (void);
 
 extern void __put_user_unknown (void);
 
+/*
+ * Evaluating arguments X, PTR, SIZE, and SEGMENT may involve subroutine-calls, which
+ * could clobber r8 (among others).  Thus, be careful not to evaluate them while using r8.
+ */
+#define __do_put_user(check, x, ptr, size, segment)					\
+({											\
+	__typeof__ (x) __pu_x = (x);							\
+	__typeof__ (*(ptr)) __user *__pu_ptr = (ptr);					\
+	__typeof__ (size) __pu_size = (size);						\
+	long __pu_err = -EFAULT;							\
+											\
+	if (!check || __access_ok(__pu_ptr, __pu_size, segment))			\
+		switch (__pu_size) {							\
+		      case 1: __put_user_size(__pu_x, __pu_ptr, 1, __pu_err); break;	\
+		      case 2: __put_user_size(__pu_x, __pu_ptr, 2, __pu_err); break;	\
+		      case 4: __put_user_size(__pu_x, __pu_ptr, 4, __pu_err); break;	\
+		      case 8: __put_user_size(__pu_x, __pu_ptr, 8, __pu_err); break;	\
+		      default: __put_user_unknown(); break;				\
+		}									\
+	__pu_err;									\
+})
+
+#define __put_user_nocheck(x, ptr, size)	__do_put_user(0, x, ptr, size, KERNEL_DS)
+#define __put_user_check(x, ptr, size, segment)	__do_put_user(1, x, ptr, size, segment)
+
+/*
+ * Complex access routines
+ */
+extern unsigned long __must_check __copy_user (void __user *to, const void __user *from,
+					       unsigned long count);
+
+static inline unsigned long
+__copy_to_user (void __user *to, const void *from, unsigned long count)
+{
+	return __copy_user(to, (__force void __user *) from, count);
+}
+
+static inline unsigned long
+__copy_from_user (void *to, const void __user *from, unsigned long count)
+{
+	return __copy_user((__force void __user *) to, from, count);
+}
+
+#define __copy_to_user_inatomic		__copy_to_user
+#define __copy_from_user_inatomic	__copy_from_user
+#define copy_to_user(to, from, n)							\
+({											\
+	void __user *__cu_to = (to);							\
+	const void *__cu_from = (from);							\
+	long __cu_len = (n);								\
+											\
+	if (__access_ok(__cu_to, __cu_len, get_fs()))					\
+		__cu_len = __copy_user(__cu_to, (__force void __user *) __cu_from, __cu_len);	\
+	__cu_len;									\
+})
+
+#define copy_from_user(to, from, n)							\
+({											\
+	void *__cu_to = (to);								\
+	const void __user *__cu_from = (from);						\
+	long __cu_len = (n);								\
+											\
+	__chk_user_ptr(__cu_from);							\
+	if (__access_ok(__cu_from, __cu_len, get_fs()))					\
+		__cu_len = __copy_user((__force void __user *) __cu_to, __cu_from, __cu_len);	\
+	__cu_len;									\
+})
+
+#define __copy_in_user(to, from, size)	__copy_user((to), (from), (size))
+
+static inline unsigned long
+copy_in_user (void __user *to, const void __user *from, unsigned long n)
+{
+	if (likely(access_ok(VERIFY_READ, from, n) && access_ok(VERIFY_WRITE, to, n)))
+		n = __copy_user(to, from, n);
+	return n;
+}
+
+extern unsigned long __do_clear_user (void __user *, unsigned long);
+
+#define __clear_user(to, n)		__do_clear_user(to, n)
+
+#define clear_user(to, n)					\
+({								\
+	unsigned long __cu_len = (n);				\
+	if (__access_ok(to, __cu_len, get_fs()))		\
+		__cu_len = __do_clear_user(to, __cu_len);	\
+	__cu_len;						\
+})
+
+
+/*
+ * Returns: -EFAULT if exception before terminator, N if the entire buffer filled, else
+ * strlen.
+ */
+extern long __must_check __strncpy_from_user (char *to, const char __user *from, long to_len);
+
+#define strncpy_from_user(to, from, n)					\
+({									\
+	const char __user * __sfu_from = (from);			\
+	long __sfu_ret = -EFAULT;					\
+	if (__access_ok(__sfu_from, 0, get_fs()))			\
+		__sfu_ret = __strncpy_from_user((to), __sfu_from, (n));	\
+	__sfu_ret;							\
+})
+
+/* Returns: 0 if bad, string length+1 (memory size) of string if ok */
+extern unsigned long __strlen_user (const char __user *);
+
+#define strlen_user(str)				\
+({							\
+	const char __user *__su_str = (str);		\
+	unsigned long __su_ret = 0;			\
+	if (__access_ok(__su_str, 0, get_fs()))		\
+		__su_ret = __strlen_user(__su_str);	\
+	__su_ret;					\
+})
+
+/*
+ * Returns: 0 if exception before NUL or reaching the supplied limit
+ * (N), a value greater than N if the limit would be exceeded, else
+ * strlen.
+ */
+extern unsigned long __strnlen_user (const char __user *, long);
+
+#define strnlen_user(str, len)					\
+({								\
+	const char __user *__su_str = (str);			\
+	unsigned long __su_ret = 0;				\
+	if (__access_ok(__su_str, 0, get_fs()))			\
+		__su_ret = __strnlen_user(__su_str, len);	\
+	__su_ret;						\
+})
+
+/* Generic code can't deal with the location-relative format that we use for compactness.  */
+#define ARCH_HAS_SORT_EXTABLE
+#define ARCH_HAS_SEARCH_EXTABLE
+
+struct exception_table_entry {
+	int addr;	/* location-relative address of insn this fixup is for */
+	int cont;	/* location-relative continuation addr.; if bit 2 is set, r9 is set to 0 */
+};
+
+extern void ia64_handle_exception (struct pt_regs *regs, const struct exception_table_entry *e);
+extern const struct exception_table_entry *search_exception_tables (unsigned long addr);
+
+static inline int
+ia64_done_with_exception (struct pt_regs *regs)
+{
+	const struct exception_table_entry *e;
+	e = search_exception_tables(regs->cr_iip + ia64_psr(regs)->ri);
+	if (e) {
+		ia64_handle_exception(regs, e);
+		return 1;
+	}
+	return 0;
+}
+
+#define ARCH_HAS_TRANSLATE_MEM_PTR	1
+static __inline__ char *
+xlate_dev_mem_ptr (unsigned long p)
+{
+	struct page *page;
+	char * ptr;
+
+	page = pfn_to_page(p >> PAGE_SHIFT);
+	if (PageUncached(page))
+		ptr = (char *)p + __IA64_UNCACHED_OFFSET;
+	else
+		ptr = __va(p);
+
+	return ptr;
+}
+
+/*
+ * Convert a virtual cached kernel memory pointer to an uncached pointer
+ */
+static __inline__ char *
+xlate_dev_kmem_ptr (char * p)
+{
+	struct page *page;
+	char * ptr;
+
+	page = virt_to_page((unsigned long)p);
+	if (PageUncached(page))
+		ptr = (char *)__pa(p) + __IA64_UNCACHED_OFFSET;
+	else
+		ptr = p;
+
+	return ptr;
+}
+
+#endif /* _ASM_IA64_UACCESS_H */