util/statetrace/arch/tracechild_i386.hh

   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 <cassert>
  38 #include <string>
  39
  40 #include "tracechild.hh"
  41
  42 class I386TraceChild : public TraceChild
  43 {
  44   public:
  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     };
  59   private:
  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
  67   protected:
  68     bool update(int pid);
  69
  70   public:
  71
  72     I386TraceChild();
  73
  74     int
  75     getNumRegs()
  76     {
  77         return numregs;
  78     }
  79
  80     bool
  81     diffSinceUpdate(int num)
  82     {
  83         assert(num < numregs && num >= 0);
  84         return regDiffSinceUpdate[num];
  85     }
  86
  87     std::string
  88     getRegName(int num)
  89     {
  90         assert(num < numregs && num >= 0);
  91         return regNames[num];
  92     }
  93
  94     int64_t getRegVal(int num);
  95     int64_t getOldRegVal(int num);
  96     uint64_t getPC() {return getRegVal(EIP);}
  97     uint64_t getSP() {return getRegVal(ESP);}
  98     std::ostream &
  99     outputStartState(std::ostream & output)
 100     {
 101         output << "Printing i386 initial state not yet implemented"
 102                << std::endl;
 103         return output;
 104     }
 105
 106     char * printReg(int num);
 107 };
 108
 109 #endif