1/*
2 * Copyright (c) 2003, 2013, 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.
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23 */
24
25package sun.jvm.hotspot.debugger.linux.amd64;
26
27import sun.jvm.hotspot.debugger.*;
28import sun.jvm.hotspot.debugger.amd64.*;
29import sun.jvm.hotspot.debugger.linux.*;
30import sun.jvm.hotspot.debugger.cdbg.*;
31import sun.jvm.hotspot.debugger.cdbg.basic.*;
32
33final public class LinuxAMD64CFrame extends BasicCFrame {
34   public LinuxAMD64CFrame(LinuxDebugger dbg, Address rbp, Address rip) {
35      super(dbg.getCDebugger());
36      this.rbp = rbp;
37      this.rip = rip;
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 rip;
49   }
50
51   public Address localVariableBase() {
52      return rbp;
53   }
54
55   public CFrame sender(ThreadProxy thread) {
56      AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
57      Address rsp = context.getRegisterAsAddress(AMD64ThreadContext.RSP);
58
59      if ( (rbp == null) || rbp.lessThan(rsp) ) {
60        return null;
61      }
62
63      // Check alignment of rbp
64      if ( dbg.getAddressValue(rbp) % ADDRESS_SIZE != 0) {
65        return null;
66      }
67
68      Address nextRBP = rbp.getAddressAt( 0 * ADDRESS_SIZE);
69      if (nextRBP == null || nextRBP.lessThanOrEqual(rbp)) {
70        return null;
71      }
72      Address nextPC  = rbp.getAddressAt( 1 * ADDRESS_SIZE);
73      if (nextPC == null) {
74        return null;
75      }
76      return new LinuxAMD64CFrame(dbg, nextRBP, nextPC);
77   }
78
79   // package/class internals only
80   private static final int ADDRESS_SIZE = 8;
81   private Address rip;
82   private Address rbp;
83   private LinuxDebugger dbg;
84}
85