util/statetrace/arch/tracechild_amd64.hh

   1 /*
   2  * Copyright (c) 2007 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_AMD64_HH
  32 #define REGSTATE_AMD64_HH
  33
  34 #include <sys/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
  42 class AMD64TraceChild : public TraceChild
  43 {
  44   public:
  45     enum RegNum
  46     {
  47         //GPRs
  48         RAX, RCX, RDX, RBX,
  49         //Base pointer and stack pointer
  50         RSP, RBP,
  51         //Index registers
  52         RSI, RDI,
  53         //New 64 bit mode registers
  54         R8, R9, R10, R11, R12, R13, R14, R15,
  55         //Segmentation registers
  56         CS, DS, ES, FS, GS, SS, FS_BASE, GS_BASE,
  57         //PC
  58         RIP,
  59         //Flags
  60         EFLAGS,
  61         numregs
  62     };
  63   private:
  64     char printBuffer [256];
  65     static char * regNames[numregs];
  66     int64_t getRegs(user_regs_struct & myregs, int num);
  67     user_regs_struct regs;
  68     user_regs_struct oldregs;
  69     bool regDiffSinceUpdate[numregs];
  70
  71     uint64_t findSyscall();
  72
  73   protected:
  74     bool update(int pid);
  75
  76   public:
  77
  78     AMD64TraceChild();
  79
  80     bool sendState(int socket);
  81
  82     int getNumRegs()
  83     {
  84         return numregs;
  85     }
  86
  87     bool diffSinceUpdate(int num)
  88     {
  89         assert(num < numregs && num >= 0);
  90         return regDiffSinceUpdate[num];
  91     }
  92
  93     std::string getRegName(int num)
  94     {
  95         assert(num < numregs && num >= 0);
  96         return regNames[num];
  97     }
  98
  99     int64_t getRegVal(int num);
 100     int64_t getOldRegVal(int num);
 101     uint64_t getPC() {return getRegVal(RIP);}
 102     uint64_t getSP() {return getRegVal(RSP);}
 103     std::ostream & outputStartState(std::ostream & output);
 104
 105     char * printReg(int num);
 106
 107     bool step();
 108 };
 109
 110 #endif