1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.runtime.sparc;
  26 
  27 import java.util.*;
  28 import sun.jvm.hotspot.asm.sparc.SPARCRegister;
  29 import sun.jvm.hotspot.asm.sparc.SPARCRegisters;
  30 import sun.jvm.hotspot.debugger.*;
  31 import sun.jvm.hotspot.runtime.*;
  32 import sun.jvm.hotspot.types.*;
  33 
  34 public class SPARCRicochetFrame {
  35   static {
  36     VM.registerVMInitializedObserver(new Observer() {
  37         public void update(Observable o, Object data) {
  38           initialize(VM.getVM().getTypeDataBase());
  39         }
  40       });
  41   }
  42 
  43   private SPARCFrame frame;
  44 
  45   private static void initialize(TypeDataBase db) {
  46     // Type type = db.lookupType("MethodHandles::RicochetFrame");
  47 
  48   }
  49 
  50   static SPARCRicochetFrame fromFrame(SPARCFrame f) {
  51     return new SPARCRicochetFrame(f);
  52   }
  53 
  54   private SPARCRicochetFrame(SPARCFrame f) {
  55     frame = f;
  56   }
  57 
  58   private Address registerValue(SPARCRegister reg) {
  59     return frame.getSP().addOffsetTo(reg.spOffsetInSavedWindow()).getAddressAt(0);
  60   }
  61 
  62   public Address savedArgsBase() {
  63     return registerValue(SPARCRegisters.L4);
  64   }
  65   public Address exactSenderSP() {
  66     return registerValue(SPARCRegisters.I5);
  67   }
  68   public Address senderLink() {
  69     return frame.getSenderSP();
  70   }
  71   public Address senderPC() {
  72     return frame.getSenderPC();
  73   }
  74   public Address extendedSenderSP() {
  75     return savedArgsBase();
  76   }
  77 }