diff -r 43c86c75a9de -r 38273543edc3 src/sim/eventq.hh
--- a/src/sim/eventq.hh	Wed Jan 04 15:03:18 2012 -0600
+++ b/src/sim/eventq.hh	Wed Jan 04 15:03:19 2012 -0600
@@ -408,6 +408,14 @@
 
     bool debugVerify() const;
 
+    // function for replacing the head of the event queue, so that a
+    // different set of events can run without disturbing events that have
+    // already been scheduled. Already scheduled events can be processed
+    // by replacing the original head back.
+    // USING THIS FUNCTION CAN BE DANGEROUS TO THE HEALTH OF THE SIMULATOR.
+    // NOT RECOMMENDED FOR USE.
+    Event* replaceHead(Event* s);
+
 #ifndef SWIG
     virtual void serialize(std::ostream &os);
     virtual void unserialize(Checkpoint *cp, const std::string &section);
diff -r 43c86c75a9de -r 38273543edc3 src/sim/eventq.cc
--- a/src/sim/eventq.cc	Wed Jan 04 15:03:18 2012 -0600
+++ b/src/sim/eventq.cc	Wed Jan 04 15:03:19 2012 -0600
@@ -373,6 +373,14 @@
     return true;
 }
 
+Event*
+EventQueue::replaceHead(Event* s)
+{
+    Event* t = head;
+    head = s;
+    return t;
+}
+
 void
 dumpMainQueue()
 {