code: /*
   * Copyright (c) 2014, Aleksander Osman
   * 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.
   * 
   * 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 HOLDER 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.
   */
  
  package ao486.test.other;
  
  import ao486.test.TestUnit;
  import ao486.test.layers.FlagsLayer;
  import ao486.test.layers.GeneralRegisterLayer;
  import ao486.test.layers.HandleModeChangeLayer;
  import ao486.test.layers.IOLayer;
  import ao486.test.layers.InstructionLayer;
  import ao486.test.layers.MemoryLayer;
  import ao486.test.layers.OtherLayer;
  import ao486.test.layers.Pair;
  import ao486.test.layers.SegmentLayer;
  import ao486.test.layers.StackLayer;
  import java.io.Serializable;
  import java.util.LinkedList;
  import java.util.Random;
  
  public class TestSETcc extends TestUnit implements Serializable {
      public static void main(String args[]) throws Exception {
          run_test(TestSETcc.class);
      }
      
      //--------------------------------------------------------------------------
      @Override
      public int get_test_count() throws Exception {
          return 100;
      }
      
      @Override
      public void init() throws Exception {
          random = new Random(10 + index);
          
          long rpl = random.nextInt(4);
          
          String instruction;
          while(true) {
              layers.clear();
              
              LinkedList<Pair<Long, Long>> prohibited_list = new LinkedList<>();
              
              InstructionLayer instr = new InstructionLayer(random, prohibited_list);
              layers.add(instr);
              layers.add(new StackLayer(random, prohibited_list));
              layers.add(new OtherLayer(OtherLayer.Type.RANDOM, random));
              layers.add(new FlagsLayer(FlagsLayer.Type.RANDOM, random));
              layers.add(new GeneralRegisterLayer(random));
              layers.add(new SegmentLayer(random));
              layers.add(new MemoryLayer(random));
              layers.add(new IOLayer(random));
              layers.addFirst(new HandleModeChangeLayer(
                      getInput("cr0_pe"),
                      getInput("vmflag"),
                      rpl, //getInput("cs_rpl"),
                      getInput("cs_p"),
                      getInput("cs_s"),
                      getInput("cs_type")
              ));
              
              // instruction size
              boolean cs_d_b = getInput("cs_d_b") == 1;
              
              boolean a32 = random.nextBoolean();
              boolean o32 = random.nextBoolean();
              
              // instruction
              instruction = prepare_instr(cs_d_b, a32, o32, null);
              
              instruction += instruction;
              instruction += "0F0F";
              
              // add instruction
              instr.add_instruction(instruction);
              
              // end condition
              break;
          }
          
          System.out.println("Instruction: [" + instruction + "]");
      }
      
      String prepare_instr(boolean cs_d_b, boolean a32, boolean o32, byte modregrm_bytes[]) throws Exception {
          int opcodes[] = {
              0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F
          };
          
          String prefix = "";
          if(cs_d_b != o32) { prefix = "66" + prefix; }
          if(cs_d_b != a32) { prefix = "67" + prefix; }
          
          int opcode = opcodes[random.nextInt(opcodes.length)];
          boolean is_modregrm = true;
          
          byte possible_modregrm = (byte)random.nextInt();
          if(opcode == 0xBA) possible_modregrm |= (1 << 5); // modregrm.reg = 4,5,6,7
          byte possible_sib      = (byte)random.nextInt();
        
          int len = (is_modregrm == false)? 1 : 1 + modregrm_len(!a32, unsigned(possible_modregrm), unsigned(possible_sib));
  System.out.println("[len final: " + len + "]");
  
          byte instr[] = new byte[len];
          instr[0] = (byte)opcode;
          for(int i=1; i<len; i++) {
              if(i==1)        instr[1] = possible_modregrm;
              else if(i==2)   instr[2] = possible_sib;
              else            instr[i] = (byte)random.nextInt();
          }
          
          return prefix + "0F" + bytesToHex(instr);
      }
  }
  