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.interrupt;

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.Layer;

import ao486.test.layers.MemoryLayer;

import ao486.test.layers.MemoryPatchLayer;

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 Test_Interrupt_Inhibit extends TestUnit implements Serializable {

    public static void main(String args[]) throws Exception {

        run_test(Test_Interrupt_Inhibit.class);

    }

    //--------------------------------------------------------------------------

    @Override

    public int get_test_count() throws Exception {

        return 100;

    }

    @Override

    public void init() throws Exception {

        random = new Random(11 + index);

        String instruction;

        while(true) {

            layers.clear();

            LinkedList<Pair<Long, Long>> prohibited_list = new LinkedList<>();

            // if false: v8086 mode

            boolean is_real = true;

            InstructionLayer instr  = new InstructionLayer(random, prohibited_list, true);

            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(is_real ? FlagsLayer.Type.RANDOM : FlagsLayer.Type.V8086, 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();

            long cs_limit = getInput("cs_limit");

            /* 0 - MOV to SS

             * 1 - STI

             * 2 - POP SS

             */

            int type = random.nextInt(3);

            final boolean if_value = (type == 1)? false : true;

            Layer esp_layer = new Layer() {

                long esp()       { return 0xF0; }

                long ss_base()   { return 0; }

                long iflag()     { return if_value? 1 : 0; }

                long tflag()     { return 0; }

                long cs_d_b()    { return 0; }

                long check_interrupt(long counter) { return counter == 0? 0xAA : counter == 1? 0xAB : 0x100; }

                long get_test_type() { return 4; }

            };

            layers.addFirst(esp_layer);

            long handler = cs_limit;

            //0xAB -- interrupt vector = 0xAB*4 = 0x2AC linear

            MemoryPatchLayer int_patch = new MemoryPatchLayer(random, prohibited_list, (int)(0xAB*4), (byte)(handler&0xFF),(byte)((handler>>8)&0xFF), 0x00,0x00);

            layers.addFirst(int_patch);

            //interrupt handler: simply IRET

            MemoryPatchLayer handler_patch = new MemoryPatchLayer(random, prohibited_list, (int)handler, 0xCF);

            layers.addFirst(handler_patch);

            int mod = 3;

            int reg = 2; // ss

            int rm  = random.nextInt(8);

            int modregrm = (mod << 6) | (reg << 3) | rm;

            String modregrm_string = String.format("%02x", modregrm);

            String instr_str =  (type == 0)?    ("8E" + modregrm_string) :

                                (type == 1)?    "FB" :

                                                "17";

            // add instruction

            instruction = instr_str + "909090909090"; // push CS

            instr.add_instruction(instruction);

            // end condition

            break;

        }

        System.out.println("Instruction: [" + instruction + "]");

    }

}