1/*
2 * Copyright (c) 2006, 2012, 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
25package sun.jvm.hotspot.debugger.linux.sparc;
26
27import sun.jvm.hotspot.debugger.*;
28import sun.jvm.hotspot.debugger.sparc.*;
29import sun.jvm.hotspot.debugger.linux.*;
30import sun.jvm.hotspot.debugger.cdbg.*;
31import sun.jvm.hotspot.debugger.cdbg.basic.*;
32
33final public class LinuxSPARCCFrame extends BasicCFrame {
34   // package/class internals only
35
36   public LinuxSPARCCFrame(LinuxDebugger dbg, Address sp, Address pc, int address_size) {
37      super(dbg.getCDebugger());
38      this.sp = sp;
39      this.pc = pc;
40      this.dbg = dbg;
41      this.address_size=address_size;
42      if (address_size==8) SPARC_STACK_BIAS = 0x7ff;
43      else SPARC_STACK_BIAS = 0x0;
44   }
45
46   // override base class impl to avoid ELF parsing
47   public ClosestSymbol closestSymbolToPC() {
48      // try native lookup in debugger.
49      return dbg.lookup(dbg.getAddressValue(pc()));
50   }
51
52   public Address pc() {
53      return     pc;
54   }
55
56   public Address localVariableBase() {
57      return sp;
58   }
59
60   public CFrame sender(ThreadProxy thread) {
61      if (sp == null) {
62        return null;
63      }
64
65      Address nextSP = sp.getAddressAt( SPARCThreadContext.R_SP * address_size + SPARC_STACK_BIAS);
66      if (nextSP == null) {
67        return null;
68      }
69      Address nextPC  = sp.getAddressAt(SPARCThreadContext.R_O7 * address_size + SPARC_STACK_BIAS);
70      if (nextPC == null) {
71        return null;
72      }
73      return new LinuxSPARCCFrame(dbg, nextSP, nextPC,address_size);
74   }
75
76   public static int SPARC_STACK_BIAS;
77   private static int address_size;
78   private Address pc;
79   private Address sp;
80   private LinuxDebugger dbg;
81}
82