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 TestINT_INT3_INTO_INT1_real extends TestUnit implements Serializable {

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

        run_test(TestINT_INT3_INTO_INT1_real.class);

    }

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

    @Override

    public int get_test_count() throws Exception {

        return 100;

    }

    @Override

    public void init() throws Exception {

        random = new Random(14 + 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);

            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");

            // type

            /* 0 - INTO overflow not set

             * 1 - IDTR limit

             * 2 - new_eip out of bounds

             *

             * 3 - all ok

             */

            int type = random.nextInt(4);

            // instruction

            boolean is_into = (type == 0)? true : random.nextInt(3) == 0;

            instruction = prepare_instr(cs_d_b, a32, o32, is_into);

            if(type == 0) {

                Layer of_layer = new Layer() {

                    long oflag() { return 0; }

                };

                layers.addFirst(of_layer);

                instruction += "0F0F";

            }

            else if(type == 1) {

                final int limit = random.nextInt(vector * 4 + 3);

                Layer idtr_layer = new Layer() {

                    long idtr_limit() { return limit; }

                };

                layers.addFirst(idtr_layer);

            }

            else if(type >= 2) {

                final int limit = vector * 4 + 4 + random.nextInt(5);

                Layer idtr_limit_layer = new Layer() {

                    long idtr_limit() { return limit; }

                };

                layers.addFirst(idtr_limit_layer);

                // set idtr base

                long idtr_base;

                while(true) {

                    idtr_base = Layer.norm(random.nextInt());

                    if( idtr_base + limit < 4294967296L &&

                        Layer.collides(prohibited_list, (int)idtr_base, (int)(idtr_base + limit)) == false

                    ) break;

                }

                prohibited_list.add(new Pair<>(idtr_base, idtr_base + limit));

                final long idtr_base_final = idtr_base;

                Layer idtr_base_layer = new Layer() {

                    long idtr_base() { return idtr_base_final; }

                };

                layers.addFirst(idtr_base_layer);

                //set cs and eip

                long new_cs;

                long new_eip;

                long dest;

                while(true) {

                    new_cs = random.nextInt(65536);

                    new_eip = random.nextInt(65536);

                    dest = (new_cs << 4) + new_eip;

                    if( dest < 4294967296L &&

                        Layer.collides(prohibited_list, (int)dest, (int)(dest + 2)) == false

                    ) break;

                }

                prohibited_list.add(new Pair<>(dest, dest + 2));

                if(type == 2 && cs_limit < 0xFFFF) {

                    new_eip = cs_limit + 1 + random.nextInt((int)(0xFFFF - cs_limit));

                }

                // set new_cs and new_eip

                MemoryPatchLayer int_patch = new MemoryPatchLayer(random, prohibited_list, (int)(idtr_base + 4*vector),

                        (byte)(new_eip & 0xFF), (byte)((new_eip >> 8) & 0xFF),

                        (byte)(new_cs & 0xFF), (byte)((new_cs >> 8) & 0xFF));

                layers.addFirst(int_patch);

                // set destination

                MemoryPatchLayer patch = new MemoryPatchLayer(random, prohibited_list, (int)dest, 0x0F,0x0F);

                layers.addFirst(patch);

System.out.printf("new_cs: %04x\n", new_cs);

System.out.printf("new_ip: %04x\n", new_eip);

System.out.printf("dest:   %08x\n", dest);

            }

            if(type >= 1 && is_into) {

                Layer of_layer = new Layer() {

                    boolean get_of() { return true; }

                };

                layers.addFirst(of_layer);

            }

            // 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, boolean is_into) throws Exception {

        int opcodes[] = {

            0xCC,0xCD,0xF1,0xCE

        };

        String prefix = "";

        if(cs_d_b != o32) { prefix = "66" + prefix; }

        if(cs_d_b != a32) { prefix = "67" + prefix; }

        int opcode = opcodes[(is_into)? 3 : random.nextInt(3)];

        int len = (opcode == 0xCD)? 2 : 1;

        byte instr[] = new byte[len];

        instr[0] = (byte)opcode;

        if(len >= 2) instr[1] = (byte)random.nextInt();

        if(opcode == 0xCC) vector = 3;

        if(opcode == 0xCD) vector = (instr[1] < 0)? instr[1] + 256 : instr[1];

        if(opcode == 0xCE) vector = 4;

        if(opcode == 0xF1) vector = 1;

        return prefix + bytesToHex(instr);

    }

    int vector;

}