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-rw-r--r--arch/microblaze/include/asm/uaccess.h212
1 files changed, 61 insertions, 151 deletions
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index 4f17950d0a0e..34b79feb1ff1 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -111,9 +111,6 @@ static inline int ___range_ok(unsigned long addr, unsigned long size)
# define __EX_TABLE_SECTION ".section .discard,\"a\"\n"
#endif
-extern unsigned long __copy_tofrom_user(void __user *to,
- const void __user *from, unsigned long size);
-
/* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */
static inline unsigned long __must_check __clear_user(void __user *to,
unsigned long n)
@@ -144,8 +141,7 @@ static inline unsigned long __must_check clear_user(void __user *to,
return __clear_user(to, n);
}
-#ifndef CONFIG_MMU
-
+/* put_user and get_user macros */
extern long __user_bad(void);
#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
@@ -251,6 +247,23 @@ extern long __user_bad(void);
); \
})
+/**
+ * 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) \
({ \
__typeof__(*(ptr)) volatile __gu_val = (x); \
@@ -274,8 +287,48 @@ extern long __user_bad(void);
__gu_err; \
})
+#ifndef CONFIG_MMU
+
#define put_user(x, ptr) __put_user((x), (ptr))
+static inline long strnlen_user(const char __user *src, long count)
+{
+ return strlen(src) + 1;
+}
+
+#define __do_strncpy_from_user(dst, src, count, res) \
+ do { \
+ char *tmp; \
+ strncpy(dst, src, count); \
+ for (tmp = dst; *tmp && count > 0; tmp++, count--) \
+ ; \
+ res = (tmp - dst); \
+ } while (0)
+
+static inline long __strncpy_from_user(char *dst,
+ const char __user *src, long count)
+{
+ long res;
+ __do_strncpy_from_user(dst, src, count, res);
+ return res;
+}
+
+static inline long strncpy_from_user(char *dst,
+ const char __user *src, long count)
+{
+ long res = -EFAULT;
+ if (access_ok(VERIFY_READ, src, 1))
+ __do_strncpy_from_user(dst, src, count, res);
+ return res;
+}
+
+static inline unsigned long __copy_tofrom_user(void __user *to,
+ const void __user *from, unsigned long size)
+{
+ memcpy(to, from, size);
+ return 0;
+}
+
#define copy_to_user(to, from, n) (memcpy((to), (from), (n)), 0)
#define copy_from_user(to, from, n) (memcpy((to), (from), (n)), 0)
@@ -291,158 +344,15 @@ extern long strnlen_user(const char *src, long count);
#else /* CONFIG_MMU */
-/* put_user and get_user macros */
-
-extern long __user_bad(void);
-
-#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \
-({ \
- __asm__ __volatile__ ( \
- "1:" insn " %1, %2, r0;" \
- " addk %0, r0, r0;" \
- "2: " \
- __FIXUP_SECTION \
- "3: brid 2b; " \
- " addik %0, r0, %3;" \
- ".previous;" \
- __EX_TABLE_SECTION \
- ".word 1b,3b;" \
- ".previous;" \
- : "=&r"(__gu_err), "=r"(__gu_val) \
- : "r"(__gu_ptr), "i"(-EFAULT) \
- ); \
-})
-
-#define __get_user(x, ptr) \
-({ \
- unsigned long __gu_val; \
- /*unsigned long __gu_ptr = (unsigned long)(ptr);*/ \
- long __gu_err; \
- switch (sizeof(*(ptr))) { \
- case 1: \
- __get_user_asm("lbu", (ptr), __gu_val, __gu_err); \
- break; \
- case 2: \
- __get_user_asm("lhu", (ptr), __gu_val, __gu_err); \
- break; \
- case 4: \
- __get_user_asm("lw", (ptr), __gu_val, __gu_err); \
- break; \
- default: \
- /* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\
- } \
- x = (__typeof__(*(ptr))) __gu_val; \
- __gu_err; \
-})
-
-/**
- * get_user: - Get a simple variable from user space.
- * @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.
- *
- * Returns zero on success, or -EFAULT on error.
- * On error, the variable @x is set to zero.
- */
-
-#define get_user(x, ptr) \
-({ \
- access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \
- ? __get_user((x), (ptr)) : -EFAULT; \
-})
-
-/**
- * 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_asm(insn, __gu_ptr, __gu_val, __gu_err) \
-({ \
- __asm__ __volatile__ ( \
- "1:" insn " %1, %2, r0;" \
- " addk %0, r0, r0;" \
- "2: " \
- __FIXUP_SECTION \
- "3: brid 2b;" \
- " addik %0, r0, %3;" \
- ".previous;" \
- __EX_TABLE_SECTION \
- ".word 1b,3b;" \
- ".previous;" \
- : "=&r"(__gu_err) \
- : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
- ); \
-})
-
-#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \
-({ \
- __asm__ __volatile__ (" lwi %0, %1, 0;" \
- "1: swi %0, %2, 0;" \
- " lwi %0, %1, 4;" \
- "2: swi %0, %2, 4;" \
- " addk %0, r0, r0;" \
- "3: " \
- __FIXUP_SECTION \
- "4: brid 3b;" \
- " addik %0, r0, %3;" \
- ".previous;" \
- __EX_TABLE_SECTION \
- ".word 1b,4b,2b,4b;" \
- ".previous;" \
- : "=&r"(__gu_err) \
- : "r"(&__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \
- ); \
-})
-
-#define __put_user(x, ptr) \
-({ \
- __typeof__(*(ptr)) volatile __gu_val = (x); \
- long __gu_err = 0; \
- switch (sizeof(__gu_val)) { \
- case 1: \
- __put_user_asm("sb", (ptr), __gu_val, __gu_err); \
- break; \
- case 2: \
- __put_user_asm("sh", (ptr), __gu_val, __gu_err); \
- break; \
- case 4: \
- __put_user_asm("sw", (ptr), __gu_val, __gu_err); \
- break; \
- case 8: \
- __put_user_asm_8((ptr), __gu_val, __gu_err); \
- break; \
- default: \
- /*__gu_err = -EINVAL;*/ __gu_err = __user_bad(); \
- } \
- __gu_err; \
-})
-
#define put_user(x, ptr) \
({ \
access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \
? __put_user((x), (ptr)) : -EFAULT; \
})
+extern unsigned long __copy_tofrom_user(void __user *to,
+ const void __user *from, unsigned long size);
+
#define __copy_from_user(to, from, n) \
__copy_tofrom_user((__force void __user *)(to), \
(void __user *)(from), (n))
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-21 01:35:47 +0000