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 TestMOV_CRx_load extends TestUnit implements Serializable {

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

        run_test(TestMOV_CRx_load.class);

    }

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

    @Override

    public int get_test_count() throws Exception {

        return 100;

    }

    @Override

    public void init() throws Exception {

        random = new Random(4 + index);

        String instruction;

        while(true) {

            layers.clear();

            /* 0 - CPL != 0

             * 1 - all ok

             */

            int type = random.nextInt(2);

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

            // if false: v8086 mode

            boolean is_real = (type == 0)? false : 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 vmflag = getInput("vmflag") == 1;

            boolean cr0_pe = getInput("cr0_pe") == 1;

            boolean a32 = random.nextBoolean();

            boolean o32 = random.nextBoolean();

            if(type == 0) {

                final int cs_rpl = (vmflag)? 3 : 1 + random.nextInt(3);

                Layer cs_rpl_layer = new Layer() {

                    long cs_rpl() { return cs_rpl; }

                };

                layers.addFirst(cs_rpl_layer);

            }

            // 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();

            final boolean cr0_wp = random.nextBoolean();

            final boolean cr0_am = random.nextBoolean();

            final boolean cr0_nw = random.nextBoolean();

            final boolean cr0_cd = random.nextBoolean();

            final int cr2 = random.nextInt();

            final int cr3 = random.nextInt();

            Layer cr0_2_3_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 cr0_wp? 1:0; }

                long cr0_am() { return cr0_am? 1:0; }

                long cr0_nw() { return cr0_nw? 1:0; }

                long cr0_cd() { return cr0_cd? 1:0; }

                long cr0_pg() { return 0; }

                long cr2() { return cr2; }

                long cr3() { return cr3; }

            };

            layers.addFirst(cr0_2_3_layer);

            // destination

            int idx = random.nextInt(3);

            int cr_reg = (random.nextInt(10) == 0)? random.nextInt(8) : ( (idx == 0)? 0 : (idx == 1)? 2 : 3 );

            int cr_mod = random.nextInt(4);

            // source

            long value = Layer.norm(random.nextInt());

            value &= 0x7FFFFFFF; // do not set PG bit

            byte modregrm_bytes[] = EffectiveAddressLayerFactory.prepare(

                    value,

                    cr_reg, EffectiveAddressLayerFactory.modregrm_reg_t.SET, // not used

                    4, a32,

                    layers, random, this, false, true);

            int cr_rm = modregrm_bytes[0] & 7;

            // check that vm flag is not set when entering protected mode

            if(cr_reg == 0 && cr0_pe == false && (value & 1) == 1 && vmflag) continue;

            // instruction

            byte modregrm_byte = (byte)((cr_mod << 6) | (cr_reg << 3) | (cr_rm));

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

            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_byte) throws Exception {

        int opcodes[] = {

            0x22

        };

        String prefix = "";

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

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

        prefix += "0F";

        int opcode = opcodes[random.nextInt(opcodes.length)];

        byte instr[] = new byte[1 + 1];

        instr[0] = (byte)opcode;

        instr[1] = modregrm_byte;

        return prefix + bytesToHex(instr);

    }

}