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[/] [ao486/] [trunk/] [ao486_tool/] [src/] [ao486/] [test/] [stack/] [TestPOP_MODREGRM.java] - Blame information for rev 2

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1 2 alfik
/*
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 * Copyright (c) 2014, Aleksander Osman
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * * Redistributions of source code must retain the above copyright notice, this
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 *   list of conditions and the following disclaimer.
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 *
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 * * Redistributions in binary form must reproduce the above copyright notice,
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 *   this list of conditions and the following disclaimer in the documentation
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 *   and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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package ao486.test.stack;
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import ao486.test.TestUnit;
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import static ao486.test.TestUnit.run_test;
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import ao486.test.layers.FlagsLayer;
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import ao486.test.layers.GeneralRegisterLayer;
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import ao486.test.layers.HandleModeChangeLayer;
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import ao486.test.layers.IOLayer;
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import ao486.test.layers.InstructionLayer;
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import ao486.test.layers.Layer;
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import ao486.test.layers.MemoryLayer;
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import ao486.test.layers.OtherLayer;
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import ao486.test.layers.Pair;
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import ao486.test.layers.SegmentLayer;
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import ao486.test.layers.StackLayer;
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import java.io.Serializable;
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import java.util.LinkedList;
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import java.util.Random;
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public class TestPOP_MODREGRM extends TestUnit implements Serializable {
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    public static void main(String args[]) throws Exception {
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        run_test(TestPOP_MODREGRM.class);
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    }
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    //--------------------------------------------------------------------------
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    @Override
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    public int get_test_count() throws Exception {
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        return 100;
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    }
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    @Override
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    public void init() throws Exception {
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        random = new Random(10 + index);
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        long rpl = random.nextInt(4);
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        String instruction;
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        while(true) {
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            layers.clear();
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            LinkedList<Pair<Long, Long>> prohibited_list = new LinkedList<>();
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            InstructionLayer instr = new InstructionLayer(random, prohibited_list);
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            layers.add(instr);
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            layers.add(new StackLayer(random, prohibited_list));
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            layers.add(new OtherLayer(OtherLayer.Type.RANDOM, random));
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            layers.add(new FlagsLayer(FlagsLayer.Type.RANDOM, random));
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            layers.add(new GeneralRegisterLayer(random));
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            layers.add(new SegmentLayer(random));
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            layers.add(new MemoryLayer(random));
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            layers.add(new IOLayer(random));
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            layers.addFirst(new HandleModeChangeLayer(
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                    getInput("cr0_pe"),
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                    getInput("vmflag"),
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                    rpl, //getInput("cs_rpl"),
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                    getInput("cs_p"),
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                    getInput("cs_s"),
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                    getInput("cs_type")
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            ));
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            // instruction size
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            boolean cs_d_b = getInput("cs_d_b") == 1;
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            boolean a32 = random.nextBoolean();
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            boolean o32 = random.nextBoolean();
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            final Random random_final = random;
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            layers.addFirst(new Layer() {
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                long ebp() throws Exception {
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                    int val = random_final.nextInt();
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                    return ((val % 18) == 0)? 0 :
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                           ((val % 18) == 1)? 1 :
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                           ((val % 18) == 2)? 2 :
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                           ((val % 18) == 3)? 3 :
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                           ((val % 18) == 4)? 4 :
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                           ((val % 18) == 5)? 0xFFFFFFFF :
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                           ((val % 18) == 6)? 0x0000FFFF :
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                                random_final.nextInt() & ((random_final.nextInt(3) == 0)? 0xFFFFFFFF : 0x00000FFF);
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                }
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                long esp() throws Exception {
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                    int val = random_final.nextInt();
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                    return ((val % 18) == 0)? 0 :
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                           ((val % 18) == 1)? 1 :
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                           ((val % 18) == 2)? 2 :
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                           ((val % 18) == 3)? 3 :
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                           ((val % 18) == 4)? 4 :
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                           ((val % 18) == 5)? 0xFFFFFFFF :
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                           ((val % 18) == 6)? 0x0000FFFF :
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                                random_final.nextInt() & ((random_final.nextInt(3) == 0)? 0xFFFFFFFF : 0x00000FFF);
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                }
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            });
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            // instruction
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            instruction = prepare_instr(cs_d_b, a32, o32, null);
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            instruction += instruction;
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            instruction += "0F0F";
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            // add instruction
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            instr.add_instruction(instruction);
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            // end condition
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            break;
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        }
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        System.out.println("Instruction: [" + instruction + "]");
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    }
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    String prepare_instr(boolean cs_d_b, boolean a32, boolean o32, byte modregrm_bytes[]) throws Exception {
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        int opcodes[] = {
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            0x8F
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        };
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        String prefix = "";
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        if(cs_d_b != o32) { prefix = "66" + prefix; }
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        if(cs_d_b != a32) { prefix = "67" + prefix; }
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        int     opcode      = opcodes[random.nextInt(opcodes.length)];
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        boolean is_modregrm = true;
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        byte possible_modregrm = (byte)random.nextInt();
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        possible_modregrm &= 0xC7; possible_modregrm |= (0 << 3); // reg in modregrm = 0
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        byte possible_sib      = (byte)random.nextInt();
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        int len = (is_modregrm == false)? 1 : 1 + modregrm_len(!a32, unsigned(possible_modregrm), unsigned(possible_sib));
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        byte instr[] = new byte[len];
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        instr[0] = (byte)opcode;
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        for(int i=1; i<len; i++) {
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            if(i==1)        instr[1] = possible_modregrm;
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            else if(i==2)   instr[2] = possible_sib;
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            else            instr[i] = (byte)random.nextInt();
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        }
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        return prefix + bytesToHex(instr);
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    }
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}

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