tracechild.hh revision 7414 
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 "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    char printBuffer[256];
73    static const char *regNames[numregs];
74    uint32_t getRegs(user_regs& myregs, int num);
75    user_regs regs;
76    user_regs oldregs;
77    bool regDiffSinceUpdate[numregs];
78    bool foundMvn;
79
80  protected:
81    bool update(int pid);
82
83  public:
84    ARMTraceChild();
85    bool sendState(int socket);
86
87    int getNumRegs()
88    {
89        return numregs;
90    }
91
92    bool diffSinceUpdate(int num)
93    {
94        assert(num < numregs && num >= 0);
95        return regDiffSinceUpdate[num];
96    }
97
98    std::string getRegName(int num)
99    {
100        assert(num < numregs && num >= 0);
101        return regNames[num];
102    }
103
104    int64_t getRegVal(int num);
105    int64_t getOldRegVal(int num);
106
107    bool step();
108
109    uint64_t getPC()
110    {
111            return getRegVal(PC);
112    }
113
114    uint64_t getSP()
115    {
116            return getRegVal(SP);
117    }
118
119    char * printReg(int num);
120
121    std::ostream & outputStartState(std::ostream & os);
122
123};
124
125#endif
126
127