1 /*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2015, Red Hat Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 package sun.jvm.hotspot.debugger.aarch64;
27
28 import java.lang.annotation.Native;
29
30 import sun.jvm.hotspot.debugger.*;
31 import sun.jvm.hotspot.debugger.cdbg.*;
32
33 /** Specifies the thread context on aarch64 platforms; only a sub-portion
34 * of the context is guaranteed to be present on all operating
35 * systems. */
36
37 public abstract class AARCH64ThreadContext implements ThreadContext {
38 // Taken from /usr/include/asm/sigcontext.h on Linux/AARCH64.
39
40 // NOTE: the indices for the various registers must be maintained as
41 // listed across various operating systems. However, only a small
42 // subset of the registers' values are guaranteed to be present (and
43 // must be present for the SA's stack walking to work)
44
45 // One instance of the Native annotation is enough to trigger header generation
46 // for this file.
47 @Native
48 public static final int R0 = 0;
49 public static final int R1 = 1;
50 public static final int R2 = 2;
51 public static final int R3 = 3;
52 public static final int R4 = 4;
53 public static final int R5 = 5;
54 public static final int R6 = 6;
55 public static final int R7 = 7;
56 public static final int R8 = 8;
57 public static final int R9 = 9;
58 public static final int R10 = 10;
59 public static final int R11 = 11;
60 public static final int R12 = 12;
61 public static final int R13 = 13;
62 public static final int R14 = 14;
63 public static final int R15 = 15;
64 public static final int R16 = 16;
65 public static final int R17 = 17;
66 public static final int R18 = 18;
67 public static final int R19 = 19;
68 public static final int R20 = 20;
69 public static final int R21 = 21;
70 public static final int R22 = 22;
71 public static final int R23 = 23;
72 public static final int R24 = 24;
73 public static final int R25 = 25;
74 public static final int R26 = 26;
75 public static final int R27 = 27;
76 public static final int R28 = 28;
77 public static final int FP = 29;
78 public static final int LR = 30;
79 public static final int SP = 31;
80 public static final int PC = 32;
81
82 public static final int NPRGREG = 33;
83
84 private long[] data;
85
86 public AARCH64ThreadContext() {
87 data = new long[NPRGREG];
88 }
89
90 public int getNumRegisters() {
91 return NPRGREG;
92 }
93
94 public String getRegisterName(int index) {
95 switch (index) {
96 case LR: return "lr";
97 case SP: return "sp";
98 case PC: return "pc";
99 default:
100 return "r" + index;
101 }
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 public CFrame getTopFrame(Debugger dbg) {
113 return null;
114 }
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 void setRegisterAsAddress(int index, Address value);
119
120 /** This can't be implemented in this class since we would have to
121 * tie the implementation to, for example, the debugging system */
122 public abstract Address getRegisterAsAddress(int index);
123 }