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- /*****************************************************************************
- * dcc decompiler
- * Reads the command line switches and then executes each major section in turn
- * (C) Cristina Cifuentes
- ****************************************************************************/
- #include "dcc.h"
- #include "msvc_fixes.h"
- #include "project.h"
- #include "CallGraph.h"
- #include "DccFrontend.h"
- #include <cstring>
- #include <iostream>
- #include <QtCore/QCoreApplication>
- #include <QCommandLineParser>
- #include <QtCore/QFile>
- /* Global variables - extern to other modules */
- extern QString asm1_name, asm2_name; /* Assembler output filenames */
- extern SYMTAB symtab; /* Global symbol table */
- extern STATS stats; /* cfg statistics */
- extern OPTION option; /* Command line options */
- static void displayTotalStats();
- /****************************************************************************
- * main
- ***************************************************************************/
- void setupOptions(const QCoreApplication &app) {
- //[-a1a2cmsi]
- QCommandLineParser parser;
- parser.setApplicationDescription("dcc");
- parser.addHelpOption();
- //parser.addVersionOption();
- //QCommandLineOption showProgressOption("p", QCoreApplication::translate("main", "Show progress during copy"));
- QCommandLineOption boolOpts[] {
- QCommandLineOption {"v", QCoreApplication::translate("main", "verbose")},
- QCommandLineOption {"V", QCoreApplication::translate("main", "very verbose")},
- QCommandLineOption {"c", QCoreApplication::translate("main", "Follow register indirect calls")},
- QCommandLineOption {"m", QCoreApplication::translate("main", "Print memory maps of program")},
- QCommandLineOption {"s", QCoreApplication::translate("main", "Print stats")}
- };
- for(QCommandLineOption &o : boolOpts) {
- parser.addOption(o);
- }
- QCommandLineOption assembly("a", QCoreApplication::translate("main", "Produce assembly"),"assembly_level");
- QCommandLineOption targetFileOption(QStringList() << "o" << "output",
- QCoreApplication::translate("main", "Place output into <file>."),
- QCoreApplication::translate("main", "file"));
- QCommandLineOption entryPointOption(QStringList() << "E",
- QCoreApplication::translate("main", "Custom entry point as hex"),
- QCoreApplication::translate("main", "offset"),
- "0"
- );
- parser.addOption(targetFileOption);
- parser.addOption(assembly);
- parser.addOption(entryPointOption);
- //parser.addOption(forceOption);
- // Process the actual command line arguments given by the user
- parser.addPositionalArgument("source", QCoreApplication::translate("main", "Dos Executable file to decompile."));
- parser.process(app);
- const QStringList args = parser.positionalArguments();
- if(args.empty()) {
- parser.showHelp();
- }
- // source is args.at(0), destination is args.at(1)
- option.verbose = parser.isSet(boolOpts[0]);
- option.VeryVerbose = parser.isSet(boolOpts[1]);
- if(parser.isSet(assembly)) {
- option.asm1 = parser.value(assembly).toInt()==1;
- option.asm2 = parser.value(assembly).toInt()==2;
- }
- option.Map = parser.isSet(boolOpts[3]);
- option.Stats = parser.isSet(boolOpts[4]);
- option.Interact = false;
- option.Calls = parser.isSet(boolOpts[2]);
- option.filename = args.first();
- option.CustomEntryPoint = parser.value(entryPointOption).toUInt(nullptr,16);
- if(parser.isSet(targetFileOption))
- asm1_name = asm2_name = parser.value(targetFileOption);
- else if(option.asm1 or option.asm2) {
- asm1_name = option.filename+".a1";
- asm2_name = option.filename+".a2";
- }
- }
- int main(int argc, char **argv)
- {
- QCoreApplication app(argc,argv);
- QCoreApplication::setApplicationVersion("0.1");
- setupOptions(app);
- /* Front end reads in EXE or COM file, parses it into I-code while
- * building the call graph and attaching appropriate bits of code for
- * each procedure.
- */
- Project::get()->create(option.filename);
- DccFrontend fe(&app);
- if(not Project::get()->load()) {
- return -1;
- }
- if (option.verbose)
- Project::get()->prog.displayLoadInfo();
- if(false==fe.FrontEnd ())
- return -1;
- if(option.asm1)
- return 0;
- /* In the middle is a so called Universal Decompiling Machine.
- * It processes the procedure list and I-code and attaches where it can
- * to each procedure an optimised cfg and ud lists
- */
- udm();
- if(option.asm2)
- return 0;
- /* Back end converts each procedure into C using I-code, interval
- * analysis, data flow etc. and outputs it to output file ready for
- * re-compilation.
- */
- BackEnd(Project::get()->callGraph);
- Project::get()->callGraph->write();
- if (option.Stats)
- displayTotalStats();
- return 0;
- }
- static void
- displayTotalStats ()
- /* Displays final statistics for the complete program */
- {
- printf ("\nFinal Program Statistics\n");
- printf (" Total number of low-level Icodes : %d\n", stats.totalLL);
- printf (" Total number of high-level Icodes: %d\n", stats.totalHL);
- printf (" Total reduction of instructions : %2.2f%%\n", 100.0 -
- (stats.totalHL * 100.0) / stats.totalLL);
- }
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