--- /dev/null	2010-09-15 21:00:00.000000000 +0800
+++ /usr/src/include/unwind.h	2010-09-15 20:59:46.000000000 +0800
@@ -0,0 +1,97 @@
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _UNWIND_H_
+#define _UNWIND_H_
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+/*
+ * C++ exception handling ABI:
+ * http://www.codesourcery.com/cxx-abi/abi-eh.html
+ */
+
+typedef enum {
+	_URC_NO_REASON = 0,
+	_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+	_URC_FATAL_PHASE2_ERROR = 2,
+	_URC_FATAL_PHASE1_ERROR = 3,
+	_URC_NORMAL_STOP = 4,
+	_URC_END_OF_STACK = 5,
+	_URC_HANDLER_FOUND = 6,
+	_URC_INSTALL_CONTEXT = 7,
+	_URC_CONTINUE_UNWIND = 8
+} _Unwind_Reason_Code;
+
+typedef	int		_Unwind_Action;
+typedef	unsigned long	_Unwind_Exception_Class;
+typedef	unsigned long	_Unwind_Word;
+typedef	unsigned long	_Unwind_Ptr;
+
+#define	_UA_SEARCH_PHASE	 1
+#define	_UA_CLEANUP_PHASE	 2
+#define	_UA_HANDLER_FRAME	 4
+#define	_UA_FORCE_UNWIND	 8
+#define	_UA_END_OF_STACK	16
+
+struct	_Unwind_Context;
+struct	_Unwind_Exception;
+
+typedef void (*_Unwind_Exception_Cleanup_Fn)
+	(_Unwind_Reason_Code,
+	 struct _Unwind_Exception *);
+
+typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
+	(int,
+	 _Unwind_Action,
+	 _Unwind_Exception_Class,
+	 struct _Unwind_Exception *,
+	 struct _Unwind_Context *,
+	 void *);
+
+struct _Unwind_Exception {
+	_Unwind_Exception_Class		exception_class;
+	_Unwind_Exception_Cleanup_Fn	exception_cleanup;
+	_Unwind_Word			private_1;
+	_Unwind_Word			private_2;
+};
+
+void		_Unwind_DeleteException(struct _Unwind_Exception *);
+_Unwind_Reason_Code	_Unwind_ForcedUnwind(struct _Unwind_Exception *,
+				_Unwind_Stop_Fn, void *);
+_Unwind_Word	_Unwind_GetCFA(struct _Unwind_Context *);
+_Unwind_Word	_Unwind_GetGR(struct _Unwind_Context *, int);
+_Unwind_Ptr	_Unwind_GetIP(struct _Unwind_Context *);
+void		*_Unwind_GetLanguageSpecificData(struct _Unwind_Context*);
+_Unwind_Ptr	_Unwind_GetRegionStart(struct _Unwind_Context *);
+_Unwind_Reason_Code	_Unwind_RaiseException(struct _Unwind_Exception *);
+void		_Unwind_Resume(struct _Unwind_Exception *);
+void		_Unwind_SetGR(struct _Unwind_Context *, int, _Unwind_Word);
+void		_Unwind_SetIP(struct _Unwind_Context *, _Unwind_Ptr);
+
+__END_DECLS
+#endif /* !_UNWIND_H_ */