--- libcoro/coro.c	2011/05/30 02:21:54	1.55
+++ libcoro/coro.c	2011/05/30 02:32:06	1.56
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2009 Marc Alexander Lehmann <schmorp@schmorp.de>
+ * Copyright (c) 2001-2011 Marc Alexander Lehmann <schmorp@schmorp.de>
  * 
  * Redistribution and use in source and binary forms, with or without modifica-
  * tion, are permitted provided that the following conditions are met:
@@ -88,6 +88,11 @@
 
   coro_transfer (new_coro, create_coro);
 
+#ifdef __linux && __elf
+  /* we blindly assume on any __linux with __elf we have a new enough gas with .cfi_undefined support */
+  asm (".cfi_undefined rip");
+#endif
+
   func ((void *)arg);
 
   /* the new coro returned. bad. just abort() for now */