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comparison agent/src/share/classes/sun/jvm/hotspot/debugger/x86/X86ThreadContext.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2000-2001 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.x86;
26
27 import sun.jvm.hotspot.debugger.*;
28
29 /** Specifies the thread context on x86 platforms; only a sub-portion
30 of the context is guaranteed to be present on all operating
31 systems. */
32
33 public abstract class X86ThreadContext implements ThreadContext {
34 // Taken from /usr/include/ia32/sys/reg.h on Solaris/x86
35
36 // NOTE: the indices for the various registers must be maintained as
37 // listed across various operating systems. However, only a small
38 // subset of the registers' values are guaranteed to be present (and
39 // must be present for the SA's stack walking to work): EAX, EBX,
40 // ECX, EDX, ESI, EDI, EBP, ESP, and EIP.
41
42 public static final int GS = 0;
43 public static final int FS = 1;
44 public static final int ES = 2;
45 public static final int DS = 3;
46 public static final int EDI = 4;
47 public static final int ESI = 5;
48 public static final int EBP = 6;
49 public static final int ESP = 7;
50 public static final int EBX = 8;
51 public static final int EDX = 9;
52 public static final int ECX = 10;
53 public static final int EAX = 11;
54 public static final int TRAPNO = 12;
55 public static final int ERR = 13;
56 public static final int EIP = 14;
57 public static final int CS = 15;
58 public static final int EFL = 16;
59 public static final int UESP = 17;
60 public static final int SS = 18;
61 // Additional state (not in reg.h) for debug registers
62 public static final int DR0 = 19;
63 public static final int DR1 = 20;
64 public static final int DR2 = 21;
65 public static final int DR3 = 22;
66 public static final int DR6 = 23;
67 public static final int DR7 = 24;
68
69
70 public static final int PC = EIP;
71 public static final int FP = EBP;
72 public static final int SP = UESP;
73 public static final int PS = EFL;
74 public static final int R0 = EAX;
75 public static final int R1 = EDX;
76
77 public static final int NPRGREG = 25;
78
79 private static final String[] regNames = {
80 "GS", "FS", "ES", "DS",
81 "EDI", "ESI", "EBP", "ESP",
82 "EBX", "EDX", "ECX", "EAX",
83 "TRAPNO", "ERR", "EIP", "CS",
84 "EFLAGS", "UESP", "SS",
85 "DR0", "DR1", "DR2", "DR3",
86 "DR6", "DR7"
87 };
88
89 // Ought to be int on x86 but we're stuck
90 private long[] data;
91
92 public X86ThreadContext() {
93 data = new long[NPRGREG];
94 }
95
96 public int getNumRegisters() {
97 return NPRGREG;
98 }
99
100 public String getRegisterName(int index) {
101 return regNames[index];
102 }
103
104 public void setRegister(int index, long value) {
105 data[index] = value;
106 }
107
108 public long getRegister(int index) {
109 return data[index];
110 }
111
112 /** This can't be implemented in this class since we would have to
113 tie the implementation to, for example, the debugging system */
114 public abstract void setRegisterAsAddress(int index, Address value);
115
116 /** This can't be implemented in this class since we would have to
117 tie the implementation to, for example, the debugging system */
118 public abstract Address getRegisterAsAddress(int index);
119 }