Index: /trunk/ccl/lisp-kernel/x86-exceptions.c
===================================================================
--- /trunk/ccl/lisp-kernel/x86-exceptions.c	(revision 4849)
+++ /trunk/ccl/lisp-kernel/x86-exceptions.c	(revision 4850)
@@ -1039,5 +1039,5 @@
   stack.ss_size = 8192;
   stack.ss_flags = 0;
-
+  mmap(stack.ss_sp,stack.ss_size, PROT_READ|PROT_WRITE|PROT_EXEC,MAP_FIXED|MAP_ANON|MAP_PRIVATE,-1,0);
   sigaltstack(&stack, NULL);
 }