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 }