+ /* on platforms with sigreturn(), we go directly back from
+ * arch_do_displaced_inst() to lisp code, so we need to clean up
+ * our bindings now. (side note: I'd love to know in exactly what
+ * scenario the speed of breakpoint handling is critical enough to
+ * justify this maintenance mess)
+ *
+ * -dan 2001.08.09 */
+
+#if !(defined(hpux) || defined(irix) || defined(__i386__) || defined(alpha))