score: separate extable.h, switch module.h to it

[cascardo/linux.git] / arch / score / include / asm / uaccess.h

diff --git a/arch/score/include/asm/uaccess.h b/arch/score/include/asm/uaccess.h
index 20a3591..db58ab9 100644 (file)
--- a/arch/score/include/asm/uaccess.h
+++ b/arch/score/include/asm/uaccess.h
@@ -4,6 +4,7 @@
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/thread_info.h>
+#include <asm/extable.h>
 
 #define VERIFY_READ            0
 #define VERIFY_WRITE           1
@@ -163,7 +164,7 @@ do {                                                                        \
                __get_user_asm(val, "lw", ptr);                         \
                 break;                                                 \
        case 8:                                                         \
-               if ((copy_from_user((void *)&val, ptr, 8)) == 0)        \
+               if (__copy_from_user((void *)&val, ptr, 8) == 0)        \
                        __gu_err = 0;                                   \
                else                                                    \
                        __gu_err = -EFAULT;                             \
@@ -188,6 +189,8 @@ do {                                                                        \
                                                                        \
        if (likely(access_ok(VERIFY_READ, __gu_ptr, size)))             \
                __get_user_common((x), size, __gu_ptr);                 \
+       else                                                            \
+               (x) = 0;                                                \
                                                                        \
        __gu_err;                                                       \
 })
@@ -201,6 +204,7 @@ do {                                                                        \
                "2:\n"                                                  \
                ".section .fixup,\"ax\"\n"                              \
                "3:li   %0, %4\n"                                       \
+               "li     %1, 0\n"                                        \
                "j      2b\n"                                           \
                ".previous\n"                                           \
                ".section __ex_table,\"a\"\n"                           \
@@ -298,35 +302,34 @@ extern int __copy_tofrom_user(void *to, const void *from, unsigned long len);
 static inline unsigned long
 copy_from_user(void *to, const void *from, unsigned long len)
 {
-       unsigned long over;
+       unsigned long res = len;
 
-       if (access_ok(VERIFY_READ, from, len))
-               return __copy_tofrom_user(to, from, len);
+       if (likely(access_ok(VERIFY_READ, from, len)))
+               res = __copy_tofrom_user(to, from, len);
 
-       if ((unsigned long)from < TASK_SIZE) {
-               over = (unsigned long)from + len - TASK_SIZE;
-               return __copy_tofrom_user(to, from, len - over) + over;
-       }
-       return len;
+       if (unlikely(res))
+               memset(to + (len - res), 0, res);
+
+       return res;
 }
 
 static inline unsigned long
 copy_to_user(void *to, const void *from, unsigned long len)
 {
-       unsigned long over;
+       if (likely(access_ok(VERIFY_WRITE, to, len)))
+               len = __copy_tofrom_user(to, from, len);
 
-       if (access_ok(VERIFY_WRITE, to, len))
-               return __copy_tofrom_user(to, from, len);
-
-       if ((unsigned long)to < TASK_SIZE) {
-               over = (unsigned long)to + len - TASK_SIZE;
-               return __copy_tofrom_user(to, from, len - over) + over;
-       }
        return len;
 }
 
-#define __copy_from_user(to, from, len)        \
-               __copy_tofrom_user((to), (from), (len))
+static inline unsigned long
+__copy_from_user(void *to, const void *from, unsigned long len)
+{
+       unsigned long left = __copy_tofrom_user(to, from, len);
+       if (unlikely(left))
+               memset(to + (len - left), 0, left);
+       return left;
+}
 
 #define __copy_to_user(to, from, len)          \
                __copy_tofrom_user((to), (from), (len))
@@ -340,17 +343,17 @@ __copy_to_user_inatomic(void *to, const void *from, unsigned long len)
 static inline unsigned long
 __copy_from_user_inatomic(void *to, const void *from, unsigned long len)
 {
-       return __copy_from_user(to, from, len);
+       return __copy_tofrom_user(to, from, len);
 }
 
-#define __copy_in_user(to, from, len)  __copy_from_user(to, from, len)
+#define __copy_in_user(to, from, len)  __copy_tofrom_user(to, from, len)
 
 static inline unsigned long
 copy_in_user(void *to, const void *from, unsigned long len)
 {
        if (access_ok(VERIFY_READ, from, len) &&
                      access_ok(VERFITY_WRITE, to, len))
-               return copy_from_user(to, from, len);
+               return __copy_tofrom_user(to, from, len);
 }
 
 /*
@@ -418,12 +421,5 @@ static inline long strnlen_user(const char __user *str, long len)
                return __strnlen_user(str, len);
 }
 
-struct exception_table_entry {
-       unsigned long insn;
-       unsigned long fixup;
-};
-
-extern int fixup_exception(struct pt_regs *regs);
-
 #endif /* __SCORE_UACCESS_H */