--- gdb/signals/signals.c.orig  Mon Jul  7 16:53:17 2008
+++ gdb/signals/signals.c       Mon Jul  7 17:24:04 2008
@@ -229,13 +229,18 @@
 char *
 target_signal_to_name (enum target_signal sig)
 {
+  static char signo_str[10];
+
   if ((int) sig >= TARGET_SIGNAL_FIRST && (int) sig <= TARGET_SIGNAL_LAST
       && signals[sig].name != NULL)
     return signals[sig].name;
   else
+  {
     /* I think the code which prints this will always print it along
        with the string, so no need to be verbose (very old comment).  */
-    return "?";
+    snprintf(signo_str, 10, "%d", sig);
+    return signo_str;
+  }
 }
 
 /* Given a name, return its signal.  */