+ * o the SIGSEGV (for Linux) or SIGBUS (for FreeBSD) used by the
+ * garbage collector to detect violations of write protection,
+ * because some cases of such signals (e.g. GC-related violations of
+ * write protection) are handled at C level and never passed on to
+ * Lisp. For such signals, we still store any Lisp-level handler
+ * in interrupt_handlers[..], but for the outermost handle we use
+ * the value from interrupt_low_level_handlers[..], instead of the
+ * ordinary interrupt_handle_now(..) or interrupt_handle_later(..).
+ *
+ * o the SIGTRAP (Linux/Alpha) which Lisp code uses to handle breakpoints,
+ * pseudo-atomic sections, and some classes of error (e.g. "function
+ * not defined"). This never goes anywhere near the Lisp handlers at all.
+ * See runtime/alpha-arch.c and code/signal.lisp
+ *
+ * - WHN 20000728, dan 20010128 */
+
+