Subversion Repositories ao486

/*
 * 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.EffectiveAddressLayerFactory;
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.Layer;
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.*;
import java.util.LinkedList;
import java.util.Random;
 
 
public class TestESC extends TestUnit implements Serializable {
    public static void main(String args[]) throws Exception {
        run_test(TestESC.class);
    }
 
    //--------------------------------------------------------------------------
    @Override
    public int get_test_count() throws Exception {
        return 100;
    }
 
    @Override
    public void init() throws Exception {
 
        random = new Random(2 + index);
 
        String instruction;
        while(true) {
            layers.clear();
 
            LinkedList<Pair<Long, Long>> prohibited_list = new LinkedList<>();
 
            // if false: v8086 mode
            boolean is_real = random.nextBoolean();
 
            InstructionLayer instr  = new InstructionLayer(random, prohibited_list);
            layers.add(instr);
            StackLayer stack        = new StackLayer(random, prohibited_list);
            layers.add(stack);
            layers.add(new OtherLayer(is_real ? OtherLayer.Type.REAL : OtherLayer.Type.PROTECTED_OR_V8086, 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"),
                    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();
 
            // random CR0 bits
            //cr0_pe set above
            final boolean cr0_mp = random.nextBoolean();
            final boolean cr0_em = random.nextBoolean();
            final boolean cr0_ts = random.nextBoolean();
            final boolean cr0_ne = random.nextBoolean();
 
            Layer cr0_layer = new Layer() {
                long cr0_mp() { return cr0_mp? 1:0; }
                long cr0_em() { return cr0_em? 1:0; }
                long cr0_ts() { return cr0_ts? 1:0; }
                long cr0_ne() { return cr0_ne? 1:0; }
                long cr0_wp() { return 0; }
                long cr0_am() { return 0; }
                long cr0_nw() { return 1; }
                long cr0_cd() { return 1; }
                long cr0_pg() { return 0; }
            };
            layers.addFirst(cr0_layer);
 
            // modregrm
            byte modregrm_bytes[] = EffectiveAddressLayerFactory.prepare(
                    0,
                    4, EffectiveAddressLayerFactory.modregrm_reg_t.SET,
                    o32? 4 : 2, a32,
                    layers, random, this, false, false);
 
 
            // instruction
            instruction = prepare_instr(cs_d_b, a32, o32, modregrm_bytes);
 
            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[] = {
            0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF
        };
 
        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)];
 
        byte instr[] = new byte[1 + modregrm_bytes.length];
        instr[0] = (byte)opcode;
        System.arraycopy(modregrm_bytes, 0, instr, 1, modregrm_bytes.length);
 
        return prefix + bytesToHex(instr);
    }
}