1 files changed, 32 insertions, 0 deletions
diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c
new file mode 100644
index 00000000000..38d710158c3
--- /dev/null
+++ b/arch/um/os-Linux/uaccess.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <setjmp.h>
+#include <string.h>
+
+unsigned long __do_user_copy(void *to, const void *from, int n,
+			     void **fault_addr, void **fault_catcher,
+			     void (*op)(void *to, const void *from,
+					int n), int *faulted_out)
+{
+	unsigned long *faddrp = (unsigned long *) fault_addr, ret;
+
+	sigjmp_buf jbuf;
+	*fault_catcher = &jbuf;
+	if(sigsetjmp(jbuf, 1) == 0){
+		(*op)(to, from, n);
+		ret = 0;
+		*faulted_out = 0;
+	}
+	else {
+		ret = *faddrp;
+		*faulted_out = 1;
+	}
+	*fault_addr = NULL;
+	*fault_catcher = NULL;
+	return ret;
+}
+