--- libcoro/coro.c	2010/12/03 19:21:59	1.53
+++ 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 */
@@ -212,8 +217,8 @@
     }
 
   /* set the new stack */
-  nstk.ss_sp    = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */
-  nstk.ss_size  = STACK_ADJUST_SIZE (sptr,ssize);
+  nstk.ss_sp    = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
+  nstk.ss_size  = STACK_ADJUST_SIZE (sptr, ssize);
   nstk.ss_flags = 0;
 
   if (sigaltstack (&nstk, &ostk) < 0)
@@ -307,6 +312,7 @@
   #endif
 
   ctx->sp -= NUM_SAVED;
+  memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
 
 # elif CORO_UCONTEXT
 
@@ -405,7 +411,8 @@
 
       pthread_attr_init (&attr);
 #if __UCLIBC__
-      pthread_attr_setstacksize (&attr, (size_t)ssize);
+      /* exists, but is borked */
+      /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
 #else
       pthread_attr_setstack (&attr, sptr, (size_t)ssize);
 #endif