--- /dev/null	2021-01-19 17:38:25.908523431 +0000
+++ new/src/cpu/aarch64/vm/registerMap_aarch64.hpp	2021-01-25 19:31:53.136648845 +0000
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2013, Red Hat Inc.
+ * Copyright (c) 1998, 2010, Oracle and/or its affiliates.
+ * All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef CPU_AARCH64_VM_REGISTERMAP_AARCH64_HPP
+#define CPU_AARCH64_VM_REGISTERMAP_AARCH64_HPP
+
+// machine-dependent implemention for register maps
+  friend class frame;
+
+ private:
+  // This is the hook for finding a register in an "well-known" location,
+  // such as a register block of a predetermined format.
+  // Since there is none, we just return NULL.
+  // See registerMap_sparc.hpp for an example of grabbing registers
+  // from register save areas of a standard layout.
+   address pd_location(VMReg reg) const {return NULL;}
+
+  // no PD state to clear or copy:
+  void pd_clear() {}
+  void pd_initialize() {}
+  void pd_initialize_from(const RegisterMap* map) {}
+
+#endif // CPU_AARCH64_VM_REGISTERMAP_AARCH64_HPP