diff --git a/arch/or1k/defs.h b/arch/or1k/defs.h
new file mode 100644
index 0000000..fe2b31f
--- /dev/null
+++ b/arch/or1k/defs.h
@@ -0,0 +1,22 @@
+#ifndef __ARCH_OR1K_DEFS_H
+#define __ARCH_OR1K_DEFS_H
+
+#define REG_SZ		(4)
+#define MCONTEXT_GREGS	(20)
+
+#define REG_SP		(1)
+#define REG_FP		(2)
+#define REG_RA		(9)
+#define REG_SA		(11)
+#define REG_LR		(14)
+#define REG_PC		(33)
+#define REG_SR		(34)
+
+#define PC_OFFSET	REG_OFFSET(REG_PC)
+
+#define FETCH_LINKPTR(dest) \
+	asm("l.ori %0, r14, 0" :: "r" ((dest)))
+
+#include "common-defs.h"
+
+#endif