code: /**
   * Copyright (c) 2006, Regents of the University of California
   * 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 University of California, Los Angeles 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.
   *
   * Creation date: Mar 28, 2007
   */
  
  package avrora.test;
  
  import avrora.core.Program;
  import avrora.syntax.elf.*;
  import avrora.sim.platform.Platform;
  import avrora.sim.platform.DefaultPlatform;
  import avrora.sim.mcu.MicrocontrollerFactory;
  import avrora.sim.Simulator;
  import avrora.sim.AtmelInterpreter;
  import avrora.sim.types.SingleSimulation;
  import avrora.Defaults;
  import cck.util.Arithmetic;
  import cck.text.Terminal;
  
  /**
   * The <code>VirgilRunner</code> class implements a simple facade that can
   * be used by java programs to load a machine code program generated from
   * a Virgil program, feed input into it, run it, and get the output. This
   * is used to automatically test the correctness of the Virgil compiler,
   * for example. This class only supports a simplified set of functionality.
   *
   * @author Ben L. Titzer
   */
  public class VirgilRunner {
  
      protected final String binaryFile;
      protected final Program program;
      protected final DefaultPlatform.Factory factory;
  
      public static void main(String[] args) throws Exception {
          if ( args.length < 2 ) {
              Terminal.printRed("Usage");
              Terminal.println(": runner <program> <input>");
              System.exit(-1);
          }
          VirgilRunner vr = new VirgilRunner(args[0]);
          int input = Integer.parseInt(args[1]);
          int output = vr.run(0x91, 0x92, input);
          Terminal.println(Integer.toString(output));
          System.exit(output);
      }
  
      public VirgilRunner(String bf) throws Exception {
          binaryFile = bf;
          ELFParser p = new ELFParser();
          program = p.read(new String[] { binaryFile });
          MicrocontrollerFactory mcf = Defaults.getMicrocontroller("atmega128");
          factory = new DefaultPlatform.Factory(8000000, 32768, mcf);
      }
  
      public int run(int staddr, int ioaddr, int input) {
          // create the node
          Platform p = factory.newPlatform(0, new SingleSimulation(), program);
          Simulator sim = p.getMicrocontroller().getSimulator();
          AtmelInterpreter inter = (AtmelInterpreter) sim.getInterpreter();
  
          try {
              // feed the input
              inter.writeDataByte(ioaddr, Arithmetic.low(input));
              inter.writeDataByte(ioaddr + 1, Arithmetic.high(input));
              // run the program
              sim.start();
          } catch ( Throwable t) {
              return -1;
          }
          // get the status code
          int status = inter.getDataByte(staddr);
          // return status code or output value
          return status != 0 ? status : inter.getDataByte(ioaddr) & 0xff;
      }
  }
  