1 files changed, 102 insertions, 0 deletions

diff --git a/include/asm-um/uaccess.h b/include/asm-um/uaccess.h
new file mode 100644
index 000000000000..801710d00a40
--- /dev/null
+++ b/include/asm-um/uaccess.h
@@ -0,0 +1,102 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_UACCESS_H
+#define __UM_UACCESS_H
+
+#include "linux/sched.h"
+
+#define VERIFY_READ 0
+#define VERIFY_WRITE 1
+
+/*
+ * The fs value determines whether argument validity checking should be
+ * performed or not.  If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ */
+
+#define MAKE_MM_SEG(s)  ((mm_segment_t) { (s) })
+
+#define KERNEL_DS       MAKE_MM_SEG(0xFFFFFFFF)
+#define USER_DS         MAKE_MM_SEG(TASK_SIZE)
+
+#define get_ds()        (KERNEL_DS)
+#define get_fs()        (current_thread_info()->addr_limit)
+#define set_fs(x)       (current_thread_info()->addr_limit = (x))
+
+#define segment_eq(a, b) ((a).seg == (b).seg)
+
+#include "um_uaccess.h"
+
+#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
+
+#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+#define __get_user(x, ptr) \
+({ \
+        const __typeof__(ptr) __private_ptr = ptr; \
+        __typeof__(*(__private_ptr)) __private_val; \
+        int __private_ret = -EFAULT; \
+        (x) = 0; \
+        if (__copy_from_user(&__private_val, (__private_ptr), \
+            sizeof(*(__private_ptr))) == 0) {\
+                (x) = (__typeof__(*(__private_ptr))) __private_val; \
+                __private_ret = 0; \
+        } \
+        __private_ret; \
+}) 
+
+#define get_user(x, ptr) \
+({ \
+        const __typeof__((*(ptr))) __user *private_ptr = (ptr); \
+        (access_ok(VERIFY_READ, private_ptr, sizeof(*private_ptr)) ? \
+         __get_user(x, private_ptr) : ((x) = 0, -EFAULT)); \
+})
+
+#define __put_user(x, ptr) \
+({ \
+        __typeof__(ptr) __private_ptr = ptr; \
+        __typeof__(*(__private_ptr)) __private_val; \
+        int __private_ret = -EFAULT; \
+        __private_val = (__typeof__(*(__private_ptr))) (x); \
+        if (__copy_to_user((__private_ptr), &__private_val, \
+                           sizeof(*(__private_ptr))) == 0) { \
+                __private_ret = 0; \
+        } \
+        __private_ret; \
+})
+
+#define put_user(x, ptr) \
+({ \
+        __typeof__(*(ptr)) __user *private_ptr = (ptr); \
+        (access_ok(VERIFY_WRITE, private_ptr, sizeof(*private_ptr)) ? \
+         __put_user(x, private_ptr) : -EFAULT); \
+})
+
+#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
+
+struct exception_table_entry
+{
+        unsigned long insn;
+        unsigned long fixup;
+};
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */