1 files changed, 71 insertions, 0 deletions

diff --git a/arch/sparc64/lib/user_fixup.c b/arch/sparc64/lib/user_fixup.c
new file mode 100644
index 000000000000..0278e34125db
--- /dev/null
+++ b/arch/sparc64/lib/user_fixup.c
@@ -0,0 +1,71 @@
+/* user_fixup.c: Fix up user copy faults.
+ *
+ * Copyright (C) 2004 David S. Miller <davem@redhat.com>
+ */
+
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+/* Calculating the exact fault address when using
+ * block loads and stores can be very complicated.
+ * Instead of trying to be clever and handling all
+ * of the cases, just fix things up simply here.
+ */
+
+unsigned long copy_from_user_fixup(void *to, const void __user *from, unsigned long size)
+{
+        char *dst = to;
+        const char __user *src = from;
+
+        while (size) {
+                if (__get_user(*dst, src))
+                        break;
+                dst++;
+                src++;
+                size--;
+        }
+
+        if (size)
+                memset(dst, 0, size);
+
+        return size;
+}
+
+unsigned long copy_to_user_fixup(void __user *to, const void *from, unsigned long size)
+{
+        char __user *dst = to;
+        const char *src = from;
+
+        while (size) {
+                if (__put_user(*src, dst))
+                        break;
+                dst++;
+                src++;
+                size--;
+        }
+
+        return size;
+}
+
+unsigned long copy_in_user_fixup(void __user *to, void __user *from, unsigned long size)
+{
+        char __user *dst = to;
+        char __user *src = from;
+
+        while (size) {
+                char tmp;
+
+                if (__get_user(tmp, src))
+                        break;
+                if (__put_user(tmp, dst))
+                        break;
+                dst++;
+                src++;
+                size--;
+        }
+
+        return size;
+}