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1 /*
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2 * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.debugger.linux.sparc;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28 import sun.jvm.hotspot.debugger.sparc.*;
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29 import sun.jvm.hotspot.debugger.linux.*;
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30 import sun.jvm.hotspot.debugger.cdbg.*;
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31 import sun.jvm.hotspot.debugger.cdbg.basic.*;
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32
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33 final public class LinuxSPARCCFrame extends BasicCFrame {
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34 // package/class internals only
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35
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36 public LinuxSPARCCFrame(LinuxDebugger dbg, Address sp, Address pc, int address_size) {
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37 super(dbg.getCDebugger());
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38 this.sp = sp;
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39 this.pc = pc;
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40 this.dbg = dbg;
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41 this.address_size=address_size;
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42 if (address_size==8) SPARC_STACK_BIAS = 0x7ff;
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43 else SPARC_STACK_BIAS = 0x0;
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44 }
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45
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46 // override base class impl to avoid ELF parsing
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47 public ClosestSymbol closestSymbolToPC() {
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48 // try native lookup in debugger.
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49 return dbg.lookup(dbg.getAddressValue(pc()));
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50 }
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51
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52 public Address pc() {
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53 return pc;
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54 }
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55
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56 public Address localVariableBase() {
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57 return sp;
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58 }
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59
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60 public CFrame sender() {
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61 if (sp == null) {
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62 return null;
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63 }
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64
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65 Address nextSP = sp.getAddressAt( SPARCThreadContext.R_SP * address_size + SPARC_STACK_BIAS);
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66 if (nextSP == null) {
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67 return null;
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68 }
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69 Address nextPC = sp.getAddressAt(SPARCThreadContext.R_O7 * address_size + SPARC_STACK_BIAS);
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70 if (nextPC == null) {
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71 return null;
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72 }
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73 return new LinuxSPARCCFrame(dbg, nextSP, nextPC,address_size);
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74 }
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75
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76 public static int SPARC_STACK_BIAS;
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77 private static int address_size;
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78 private Address pc;
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79 private Address sp;
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80 private LinuxDebugger dbg;
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81 }
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