Index: boot/arch/sparc64/include/arch.h
===================================================================
--- boot/arch/sparc64/include/arch.h	(revision 96b02eb9b2f96f3843b8275c254c43a9cb6c8c88)
+++ boot/arch/sparc64/include/arch.h	(revision c7f23c0fa2e27bbabca0e5d3f5bdb36db88ad843)
@@ -41,4 +41,5 @@
 #define STACK_BIAS                   2047
 #define STACK_WINDOW_SAVE_AREA_SIZE  (16 * 8)
+#define STACK_ARG_SAVE_AREA_SIZE     (6 * 8)
 
 #define NWINDOWS  8