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diff --git a/gcc/config/rs6000/darwin-unwind.h b/gcc/config/rs6000/darwin-unwind.h
new file mode 100644
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+++ b/gcc/config/rs6000/darwin-unwind.h
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+/* DWARF2 EH unwinding support for Darwin.
+   Copyright (C) 2004, 2009 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC 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 3, or (at your option)
+   any later version.
+
+   GCC 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+extern bool _Unwind_fallback_frame_state_for
+  (struct _Unwind_Context *context, _Unwind_FrameState *fs);
+
+#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS)	\
+  (_Unwind_fallback_frame_state_for (CONTEXT, FS)	\
+   ? _URC_NO_REASON : _URC_END_OF_STACK)