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Migrate from devo/gcc/ch.

From-SVN: r22032

gcc/ch/runtime/exhstack.c

+/* Implement runtime actions for CHILL.
+   Copyright (C) 1992,1993 Free Software Foundation, Inc.
+   Author: Wilfried Moser
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#define __CHILL_LIB__
+
+#include "config.h"
+#include <setjmp.h>
+#include "rtltypes.h"
+
+typedef void (*init_ptr) ();
+typedef int * tasking_ptr;
+
+static TExceptionHandlerStack	*__exceptionStack;
+
+TExceptionHandlerStack * __getexceptionStack ()
+{
+  return __exceptionStack;
+}
+
+void __setexceptionStack (TExceptionHandlerStack *new)
+{
+  __exceptionStack = new;
+}