system.cpp

/*
 *
 *  Copyright (C) 2010-2011 Amr Thabet <amr.thabet@student.alx.edu.eg>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to Amr Thabet
 *  amr.thabet@student.alx.edu.eg
 *
 */

#include "x86emu.h"
#ifdef WIN32
#include "windows.h"
#endif
System::System(EnviromentVariables * v)
{
    dis_entries = 0;

    // 1.initialize the opcodes

    opcodes_init();
    // 2.initalize the environment variables

    init_vars(v);
    // 3.initalize the API calls
    dll_entries = 0;
    api_entries = 0;
    init_apis(enVars.dllspath);
}

// For disassembling and assembling only

System::System()
{
    dis_entries = 0;

    // initialize the opcodes

    opcodes_init();
    dll_entries = 0;
    api_entries = 0;
}

System::~System() {
    for (int i = 0; i < dll_entries; i++) {
#ifdef WIN32
        VirtualFree((void *) DLLs[0].imagebase, DLLs[0].size, MEM_DECOMMIT);
#else
        free((void *) DLLs[i].imagebase);
#endif
    }
}

//Here just initialize the addresses
void System::init_vars(EnviromentVariables * v)
{
    if (v->kernel32 != 0) {
        this->enVars.kernel32 = v->kernel32;
    } else {
        this->enVars.kernel32 = 0x75EE0000;
    }
    if (v->ntdll != 0) {
        this->enVars.ntdll = v->ntdll;
    } else {
        this->enVars.ntdll = 0x77580000;
    }
    if (v->user32 != 0) {
        this->enVars.user32 = v->user32;
    } else {
        this->enVars.user32 = 0x759D0000;
    }
    if ((DWORD) v->dllspath == 0) {
        this->enVars.dllspath = "";
    } else {
        this->enVars.dllspath = v->dllspath;
    }
    if ((DWORD) v->MaxIterations == 0) {
        this->enVars.MaxIterations = 10000000; // 10 million iterations
    } else {
        this->enVars.MaxIterations = v->MaxIterations;
    }
}

string System::getversion() {
    return "1.20";
}

string System::getCopyrights() {
    return "Pokas x86 Emulator v. 1.20 \n \
      Copyrights � by AmrThabet @ 2010 and all rights reserved to him\n";
}