tracechild.hh revision 6407 
1/*
2 * Copyright (c) 2009 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 *          Gabe Black
30 */
31
32#ifndef TRACECHILD_ARM_HH
33#define TRACECHILD_ARM_HH
34
35#include <cassert>
36#include <string>
37#include <sys/user.h>
38#include <sys/ptrace.h>
39#include "tracechild.hh"
40
41
42class ARMTraceChild : public TraceChild
43{
44  public:
45    enum RegNum
46    {
47        // r0 - r3 argument, temp, caller save
48        // r4 - r10 callee save
49        // r11 - FP
50        // r12 - temp
51        // r13 - stack
52        // r14 - link
53        // r15 - pc
54        R0, R1, R2, R3, R4, R5, R6, R7,
55        R8, R9, R10, FP, R12, SP, LR, PC,
56        CPSR,
57        numregs
58    };
59  private:
60    char printBuffer[256];
61    static const char *regNames[numregs];
62    uint32_t getRegs(user_regs& myregs, int num);
63    user_regs regs;
64    user_regs oldregs;
65    bool regDiffSinceUpdate[numregs];
66
67  protected:
68    bool update(int pid);
69
70  public:
71    ARMTraceChild();
72    bool sendState(int socket);
73
74    int getNumRegs()
75    {
76        return numregs;
77    }
78
79    bool diffSinceUpdate(int num)
80    {
81        assert(num < numregs && num >= 0);
82        return regDiffSinceUpdate[num];
83    }
84
85    std::string getRegName(int num)
86    {
87        assert(num < numregs && num >= 0);
88        return regNames[num];
89    }
90
91    int64_t getRegVal(int num);
92    int64_t getOldRegVal(int num);
93
94    bool step();
95
96    uint64_t getPC()
97    {
98            return getRegVal(PC);
99    }
100
101    uint64_t getSP()
102    {
103            return getRegVal(SP);
104    }
105
106    char * printReg(int num);
107
108    std::ostream & outputStartState(std::ostream & os);
109
110};
111
112#endif
113
114