1 files changed, 4 insertions, 0 deletions
diff --git a/include/apos/tcb.h b/include/apos/tcb.h
index 7ed07c5..821d822 100644
--- a/include/apos/tcb.h
+++ b/include/apos/tcb.h
@@ -16,8 +16,12 @@ struct tcb {
 	id_t tid;
 
 	vm_t callback;
+
 	vm_t proc_stack;
+	vm_t proc_stack_top;
+
 	vm_t call_stack;
+	vm_t call_stack_top;
 
 	/* entry point */
 	vm_t entry;