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diff --git a/REORG.TODO/sysdeps/x86_64/machine-gmon.h b/REORG.TODO/sysdeps/x86_64/machine-gmon.h
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+/* x86-64-specific implementation of profiling support.
+   Copyright (C) 2002-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+/* We need a special version of the `mcount' function since for x86-64
+   so that we do not use __builtin_return_address (N) and avoid
+   clobbering of register.  */
+
+
+/* We must not pollute the global namespace.  */
+#define mcount_internal __mcount_internal
+
+void mcount_internal (u_long frompc, u_long selfpc);
+
+#define _MCOUNT_DECL(frompc, selfpc) \
+void mcount_internal (u_long frompc, u_long selfpc)
+
+
+/* Define MCOUNT as empty since we have the implementation in another
+   file.  */
+#define MCOUNT