--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/zero/entry_zero.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2008, 2009, 2010 Red Hat, Inc.
+ * 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_ZERO_VM_ENTRY_ZERO_HPP
+#define CPU_ZERO_VM_ENTRY_ZERO_HPP
+
+#include "interpreter/cppInterpreter.hpp"
+
+class ZeroEntry {
+ public:
+  ZeroEntry() {
+    ShouldNotCallThis();
+  }
+
+ private:
+  address _entry_point;
+
+ public:
+  address entry_point() const {
+    return _entry_point;
+  }
+  void set_entry_point(address entry_point) {
+    _entry_point = entry_point;
+  }
+
+ private:
+  typedef int (*NormalEntryFunc)(Method* method,
+                                 intptr_t  base_pc,
+                                 TRAPS);
+  typedef int (*OSREntryFunc)(Method* method,
+                              address   osr_buf,
+                              intptr_t  base_pc,
+                              TRAPS);
+
+ public:
+  void invoke(Method* method, TRAPS) const {
+    maybe_deoptimize(
+      ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD),
+      THREAD);
+  }
+  void invoke_osr(Method* method, address osr_buf, TRAPS) const {
+    maybe_deoptimize(
+      ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD),
+      THREAD);
+  }
+
+ private:
+  static void maybe_deoptimize(int deoptimized_frames, TRAPS) {
+    if (deoptimized_frames)
+      CppInterpreter::main_loop(deoptimized_frames - 1, THREAD);
+  }
+
+ public:
+  static ByteSize entry_point_offset() {
+    return byte_offset_of(ZeroEntry, _entry_point);
+  }
+};
+
+#endif // CPU_ZERO_VM_ENTRY_ZERO_HPP