/*
 * Copyright (c) 2007 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Gabe Black
 */

#ifndef REGSTATE_AMD64_HH
#define REGSTATE_AMD64_HH

#include <sys/user.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <assert.h>
#include <string>

#include "tracechild.hh"

class AMD64TraceChild : public TraceChild
{
  public:
    enum RegNum
    {
        //GPRs
        RAX, RCX, RDX, RBX,
        //Base pointer and stack pointer
        RSP, RBP,
        //Index registers
        RSI, RDI,
        //New 64 bit mode registers
        R8, R9, R10, R11, R12, R13, R14, R15,
        //Segmentation registers
        CS, DS, ES, FS, GS, SS, FS_BASE, GS_BASE,
        //PC
        RIP,
        //Flags
        EFLAGS,
        numregs
    };
  private:
    char printBuffer [256];
    static char * regNames[numregs];
    int64_t getRegs(user_regs_struct & myregs, int num);
    user_regs_struct regs;
    user_regs_struct oldregs;
    bool regDiffSinceUpdate[numregs];

    uint64_t findSyscall();

  protected:
    bool update(int pid);

  public:

    AMD64TraceChild();

    bool sendState(int socket);

    int getNumRegs()
    {
        return numregs;
    }

    bool diffSinceUpdate(int num)
    {
        assert(num < numregs && num >= 0);
        return regDiffSinceUpdate[num];
    }

    std::string getRegName(int num)
    {
        assert(num < numregs && num >= 0);
        return regNames[num];
    }

    int64_t getRegVal(int num);
    int64_t getOldRegVal(int num);
    uint64_t getPC() {return getRegVal(RIP);}
    uint64_t getSP() {return getRegVal(RSP);}
    std::ostream & outputStartState(std::ostream & output);

    char * printReg(int num);

    bool step();
};

#endif