diff --git a/src/unwind/Backtrace.c b/src/unwind/Backtrace.c
index e69de29..82c2a61 100644
--- a/src/unwind/Backtrace.c
+++ b/src/unwind/Backtrace.c
@@ -0,0 +1,53 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#include "unwind-internal.h"
+
+PROTECTED _Unwind_Reason_Code
+_Unwind_Backtrace (_Unwind_Trace_Fn trace, void *trace_parameter)
+{
+  struct _Unwind_Context context;
+  unw_context_t uc;
+  int ret;
+
+  if (_Unwind_InitContext (&context, &uc) < 0)
+    return _URC_FATAL_PHASE1_ERROR;
+
+  /* Phase 1 (search phase) */
+
+  while (1)
+    {
+      if ((ret = unw_step (&context.cursor)) <= 0)
+	{
+	  if (ret == 0)
+	    return _URC_END_OF_STACK;
+	  else
+	    return _URC_FATAL_PHASE1_ERROR;
+	}
+
+      if ((*trace) (&context, trace_parameter) != _URC_NO_REASON)
+	return _URC_FATAL_PHASE1_ERROR;
+    }
+}