fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / um / include / um_uaccess.h

diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h
index c9b3574..5126a99 100644 (file)
--- a/arch/um/include/um_uaccess.h
+++ b/arch/um/include/um_uaccess.h
@@ -6,33 +6,45 @@
 #ifndef __ARCH_UM_UACCESS_H
 #define __ARCH_UM_UACCESS_H
 
-#include "linux/config.h"
 #include "choose-mode.h"
 
 #ifdef CONFIG_MODE_TT
-#include "../kernel/tt/include/uaccess.h"
+#include "uaccess-tt.h"
 #endif
 
 #ifdef CONFIG_MODE_SKAS
-#include "../kernel/skas/include/uaccess.h"
+#include "uaccess-skas.h"
 #endif
 
-#define access_ok(type, addr, size) \
-       CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size)
+#include "asm/fixmap.h"
 
-static inline int verify_area(int type, const void * addr, unsigned long size)
-{
-       return(CHOOSE_MODE_PROC(verify_area_tt, verify_area_skas, type, addr,
-                               size));
-}
+#define __under_task_size(addr, size) \
+       (((unsigned long) (addr) < TASK_SIZE) && \
+         (((unsigned long) (addr) + (size)) < TASK_SIZE))
+
+#define __access_ok_vsyscall(type, addr, size) \
+        ((type == VERIFY_READ) && \
+         ((unsigned long) (addr) >= FIXADDR_USER_START) && \
+         ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
+         ((unsigned long) (addr) + (size) >= (unsigned long)(addr)))
+
+#define __addr_range_nowrap(addr, size) \
+       ((unsigned long) (addr) <= ((unsigned long) (addr) + (size)))
+
+#define access_ok(type, addr, size) \
+       (__addr_range_nowrap(addr, size) && \
+        (__under_task_size(addr, size) || \
+         __access_ok_vsyscall(type, addr, size) || \
+         segment_eq(get_fs(), KERNEL_DS) || \
+         CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size)))
 
-static inline int copy_from_user(void *to, const void *from, int n)
+static inline int copy_from_user(void *to, const void __user *from, int n)
 {
        return(CHOOSE_MODE_PROC(copy_from_user_tt, copy_from_user_skas, to,
                                from, n));
 }
 
-static inline int copy_to_user(void *to, const void *from, int n)
+static inline int copy_to_user(void __user *to, const void *from, int n)
 {
        return(CHOOSE_MODE_PROC(copy_to_user_tt, copy_to_user_skas, to, 
                                from, n));
@@ -57,7 +69,7 @@ static inline int copy_to_user(void *to, const void *from, int n)
  * and returns @count.
  */
 
-static inline int strncpy_from_user(char *dst, const char *src, int count)
+static inline int strncpy_from_user(char *dst, const char __user *src, int count)
 {
        return(CHOOSE_MODE_PROC(strncpy_from_user_tt, strncpy_from_user_skas,
                                dst, src, count));
@@ -89,7 +101,7 @@ static inline int __clear_user(void *mem, int len)
  * Returns number of bytes that could not be cleared.
  * On success, this will be zero.
  */
-static inline int clear_user(void *mem, int len)
+static inline int clear_user(void __user *mem, int len)
 {
        return(CHOOSE_MODE_PROC(clear_user_tt, clear_user_skas, mem, len));
 }
@@ -105,7 +117,7 @@ static inline int clear_user(void *mem, int len)
  * On exception, returns 0.
  * If the string is too long, returns a value greater than @n.
  */
-static inline int strnlen_user(const void *str, int len)
+static inline int strnlen_user(const void __user *str, long len)
 {
        return(CHOOSE_MODE_PROC(strnlen_user_tt, strnlen_user_skas, str, len));
 }