+/*
+ * J. David Anglin writes:
+ *
+ * "You have to adjust the current sp to that at the begining of the function.
+ * There can be up to two stack additions to allocate the frame in the
+ * prologue. Similar things happen in the epilogue. In the presence of
+ * interrupts, you have to be concerned about where you are in the function
+ * and what stack adjustments have taken place."
+ *
+ * For now these cases are not handled, but they should be!
+ */
+