1/*
2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2015, Red Hat Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26package sun.jvm.hotspot.runtime.aarch64;
27
28import java.util.*;
29import sun.jvm.hotspot.debugger.*;
30import sun.jvm.hotspot.types.*;
31import sun.jvm.hotspot.runtime.*;
32
33public class AARCH64JavaCallWrapper extends JavaCallWrapper {
34  private static AddressField lastJavaFPField;
35
36  static {
37    VM.registerVMInitializedObserver(new Observer() {
38        public void update(Observable o, Object data) {
39          initialize(VM.getVM().getTypeDataBase());
40        }
41      });
42  }
43
44  private static synchronized void initialize(TypeDataBase db) {
45    Type type = db.lookupType("JavaFrameAnchor");
46
47    lastJavaFPField  = type.getAddressField("_last_Java_fp");
48  }
49
50  public AARCH64JavaCallWrapper(Address addr) {
51    super(addr);
52  }
53
54  public Address getLastJavaFP() {
55    return lastJavaFPField.getValue(addr.addOffsetTo(anchorField.getOffset()));
56  }
57}
58