tracechild.hh revision 8113 
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2009 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 *          Gabe Black
42 */
43
44#ifndef TRACECHILD_ARM_HH
45#define TRACECHILD_ARM_HH
46
47#include <cassert>
48#include <string>
49#include <sys/user.h>
50#include <sys/ptrace.h>
51#include "base/tracechild.hh"
52
53
54class ARMTraceChild : public TraceChild
55{
56  public:
57    enum RegNum
58    {
59        // r0 - r3 argument, temp, caller save
60        // r4 - r10 callee save
61        // r11 - FP
62        // r12 - temp
63        // r13 - stack
64        // r14 - link
65        // r15 - pc
66        R0, R1, R2, R3, R4, R5, R6, R7,
67        R8, R9, R10, FP, R12, SP, LR, PC,
68        CPSR,
69        numregs
70    };
71  private:
72    uint32_t getRegs(user_regs& myregs, int num);
73    user_regs regs;
74    user_regs oldregs;
75    bool regDiffSinceUpdate[numregs];
76    bool foundMvn;
77
78  protected:
79    bool update(int pid);
80
81  public:
82    ARMTraceChild();
83    bool sendState(int socket);
84
85    int64_t getRegVal(int num);
86    int64_t getOldRegVal(int num);
87
88    bool step();
89
90    uint64_t
91    getPC()
92    {
93        return getRegVal(PC);
94    }
95
96    uint64_t
97    getSP()
98    {
99        return getRegVal(SP);
100    }
101
102    std::ostream & outputStartState(std::ostream & os);
103
104};
105
106#endif
107
108