tracechild.hh revision 3115 
1/*
2 * Copyright (c) 2006 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: Gabe Black
29 */
30
31#ifndef REGSTATE_I386_HH
32#define REGSTATE_I386_HH
33
34#include <linux/user.h>
35#include <sys/types.h>
36#include <sys/ptrace.h>
37#include <assert.h>
38#include <string>
39
40#include "tracechild.hh"
41
42class I386TraceChild : public TraceChild
43{
44public:
45        enum RegNum
46        {
47                //GPRs
48                EAX, EBX, ECX, EDX,
49                //Index registers
50                ESI, EDI,
51                //Base pointer and stack pointer
52                EBP, ESP,
53                //Segmentation registers
54                CS, DS, ES, FS, GS, SS,
55                //PC
56                EIP,
57                numregs
58        };
59private:
60        char printBuffer [256];
61        static char * regNames[numregs];
62        int64_t getRegs(user_regs_struct & myregs, int num);
63        user_regs_struct regs;
64        user_regs_struct oldregs;
65        bool regDiffSinceUpdate[numregs];
66
67protected:
68        bool update(int pid);
69
70public:
71
72        I386TraceChild();
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        uint64_t getPC() {return getRegVal(EIP);}
94        uint64_t getSP() {return getRegVal(ESP);}
95        std::ostream & outputStartState(std::ostream & output)
96        {
97            output << "Printing i386 initial state not yet implemented"
98                << std::endl;
99            return output;
100        }
101
102        char * printReg(int num);
103};
104
105#endif
106