1 /* 2 * Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.debugger.linux.x86; 26 27 import sun.jvm.hotspot.debugger.*; 28 import sun.jvm.hotspot.debugger.linux.*; 29 import sun.jvm.hotspot.debugger.cdbg.*; 30 import sun.jvm.hotspot.debugger.cdbg.basic.*; 31 32 final public class LinuxX86CFrame extends BasicCFrame { 33 // package/class internals only 34 public LinuxX86CFrame(LinuxDebugger dbg, Address ebp, Address pc) { 35 super(dbg.getCDebugger()); 36 this.ebp = ebp; 37 this.pc = pc; 38 this.dbg = dbg; 39 } 40 41 // override base class impl to avoid ELF parsing 42 public ClosestSymbol closestSymbolToPC() { 43 // try native lookup in debugger. 44 return dbg.lookup(dbg.getAddressValue(pc())); 45 } 46 47 public Address pc() { 48 return pc; 49 } 50 51 public Address localVariableBase() { 52 return ebp; 53 } 54 55 public CFrame sender() { 56 if (ebp == null) { 57 return null; 58 } 59 60 Address nextEBP = ebp.getAddressAt( 0 * ADDRESS_SIZE); 61 if (nextEBP == null) { 62 return null; 63 } 64 Address nextPC = ebp.getAddressAt( 1 * ADDRESS_SIZE); 65 if (nextPC == null) { 66 return null; 67 } 68 return new LinuxX86CFrame(dbg, nextEBP, nextPC); 69 } 70 71 private static final int ADDRESS_SIZE = 4; 72 private Address pc; 73 private Address ebp; 74 private LinuxDebugger dbg; 75 }