1 /*
   2  * Copyright (c) 2003, 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.debugger.bsd.amd64;
  26 
  27 import sun.jvm.hotspot.debugger.*;
  28 import sun.jvm.hotspot.debugger.bsd.*;
  29 import sun.jvm.hotspot.debugger.cdbg.*;
  30 import sun.jvm.hotspot.debugger.cdbg.basic.*;
  31 
  32 final public class BsdAMD64CFrame extends BasicCFrame {
  33    public BsdAMD64CFrame(BsdDebugger dbg, Address rbp, Address rip) {
  34       super(dbg.getCDebugger());
  35       this.rbp = rbp;
  36       this.rip = rip;
  37       this.dbg = dbg;
  38    }
  39 
  40    // override base class impl to avoid ELF parsing
  41    public ClosestSymbol closestSymbolToPC() {
  42       // try native lookup in debugger.
  43       return dbg.lookup(dbg.getAddressValue(pc()));
  44    }
  45 
  46    public Address pc() {
  47       return rip;
  48    }
  49 
  50    public Address localVariableBase() {
  51       return rbp;
  52    }
  53 
  54    public CFrame sender() {
  55       if (rbp == null) {
  56         return null;
  57       }
  58 
  59       Address nextRBP = rbp.getAddressAt( 0 * ADDRESS_SIZE);
  60       if (nextRBP == null) {
  61         return null;
  62       }
  63       Address nextPC  = rbp.getAddressAt( 1 * ADDRESS_SIZE);
  64       if (nextPC == null) {
  65         return null;
  66       }
  67       return new BsdAMD64CFrame(dbg, nextRBP, nextPC);
  68    }
  69 
  70    // package/class internals only
  71    private static final int ADDRESS_SIZE = 8;
  72    private Address rip;
  73    private Address rbp;
  74    private BsdDebugger dbg;
  75 }