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authorGlauber Costa <gcosta@redhat.com>2008-06-25 11:05:11 -0300
committerIngo Molnar <mingo@elte.hu>2008-07-09 09:14:18 +0200
commit865e5b76505cdade261773bde32f785b3ce579f1 (patch)
tree3ac122f2b95162b286b1a136ec4460f422b0d8b9 /include
parentca23386216b9d4fc3bb211101205077d2b2916ae (diff)
x86: merge getuser.
Merge versions of getuser from uaccess_32.h and uaccess_64.h into uaccess.h. There is a part which is 64-bit only (for now), and for that, we use a __get_user_8 macro. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86/uaccess.h55
-rw-r--r--include/asm-x86/uaccess_32.h43
-rw-r--r--include/asm-x86/uaccess_64.h29
3 files changed, 55 insertions, 72 deletions
diff --git a/include/asm-x86/uaccess.h b/include/asm-x86/uaccess.h
index 2fc30c2a8a9..8cb580c0b41 100644
--- a/include/asm-x86/uaccess.h
+++ b/include/asm-x86/uaccess.h
@@ -120,6 +120,61 @@ extern int __get_user_bad(void);
: "=a" (ret),"=d" (x) \
: "0" (ptr)) \
+/* Careful: we have to cast the result to the type of the pointer
+ * for sign reasons */
+
+/**
+ * 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.
+ */
+#ifdef CONFIG_X86_32
+#define __get_user_8(__ret_gu, __val_gu, ptr) \
+ __get_user_x(X, __ret_gu, __val_gu, ptr)
+#else
+#define __get_user_8(__ret_gu, __val_gu, ptr) \
+ __get_user_x(8, __ret_gu, __val_gu, ptr)
+#endif
+
+#define get_user(x, ptr) \
+({ \
+ int __ret_gu; \
+ unsigned long __val_gu; \
+ __chk_user_ptr(ptr); \
+ switch (sizeof(*(ptr))) { \
+ case 1: \
+ __get_user_x(1, __ret_gu, __val_gu, ptr); \
+ break; \
+ case 2: \
+ __get_user_x(2, __ret_gu, __val_gu, ptr); \
+ break; \
+ case 4: \
+ __get_user_x(4, __ret_gu, __val_gu, ptr); \
+ break; \
+ case 8: \
+ __get_user_8(__ret_gu, __val_gu, ptr); \
+ break; \
+ default: \
+ __get_user_x(X, __ret_gu, __val_gu, ptr); \
+ break; \
+ } \
+ (x) = (__typeof__(*(ptr)))__val_gu; \
+ __ret_gu; \
+})
+
+
#ifdef CONFIG_X86_32
# include "uaccess_32.h"
#else
diff --git a/include/asm-x86/uaccess_32.h b/include/asm-x86/uaccess_32.h
index 92ad19e7098..3cc32369443 100644
--- a/include/asm-x86/uaccess_32.h
+++ b/include/asm-x86/uaccess_32.h
@@ -24,49 +24,6 @@ extern struct movsl_mask {
((unsigned long __force)(addr) < \
(current_thread_info()->addr_limit.seg))
-/* Careful: we have to cast the result to the type of the pointer
- * for sign reasons */
-
-/**
- * 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) \
-({ \
- int __ret_gu; \
- unsigned long __val_gu; \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- __get_user_x(1, __ret_gu, __val_gu, ptr); \
- break; \
- case 2: \
- __get_user_x(2, __ret_gu, __val_gu, ptr); \
- break; \
- case 4: \
- __get_user_x(4, __ret_gu, __val_gu, ptr); \
- break; \
- default: \
- __get_user_x(X, __ret_gu, __val_gu, ptr); \
- break; \
- } \
- (x) = (__typeof__(*(ptr)))__val_gu; \
- __ret_gu; \
-})
-
extern void __put_user_bad(void);
/*
diff --git a/include/asm-x86/uaccess_64.h b/include/asm-x86/uaccess_64.h
index 243dbb467f3..4a44b906e4c 100644
--- a/include/asm-x86/uaccess_64.h
+++ b/include/asm-x86/uaccess_64.h
@@ -14,35 +14,6 @@
#define ARCH_HAS_SEARCH_EXTABLE
-/* Careful: we have to cast the result to the type of the pointer
- * for sign reasons */
-
-#define get_user(x, ptr) \
-({ \
- unsigned long __val_gu; \
- int __ret_gu; \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: \
- __get_user_x(1, __ret_gu, __val_gu, ptr); \
- break; \
- case 2: \
- __get_user_x(2, __ret_gu, __val_gu, ptr); \
- break; \
- case 4: \
- __get_user_x(4, __ret_gu, __val_gu, ptr); \
- break; \
- case 8: \
- __get_user_x(8, __ret_gu, __val_gu, ptr); \
- break; \
- default: \
- __get_user_bad(); \
- break; \
- } \
- (x) = (__force typeof(*(ptr)))__val_gu; \
- __ret_gu; \
-})
-
extern void __put_user_1(void);
extern void __put_user_2(void);
extern void __put_user_4(void);