Examples with InternalTranslationException com.google.security.zynamics.reil.translators.InternalTranslationException used on opensource projects

Example 6 with InternalTranslationException

use of com.google.security.zynamics.reil.translators.InternalTranslationException in project binnavi by google.

the class LoopTranslator method translate.

/**
   * Translates a LOOP instruction to REIL code.
   * 
   * @param environment A valid translation environment.
   * @param instruction The LOOP instruction to translate.
   * @param instructions The generated REIL code will be added to this list
   * 
   * @throws InternalTranslationException if any of the arguments are null the passed instruction is
   *         not a LOOP instruction
   */
@Override
public void translate(final ITranslationEnvironment environment, final IInstruction instruction, final List<ReilInstruction> instructions) throws InternalTranslationException {
    TranslationHelpers.checkTranslationArguments(environment, instruction, instructions, "loop");
    if (instruction.getOperands().size() != 1) {
        throw new InternalTranslationException("Error: Argument instruction is not a loop instruction (invalid number of operand)");
    }
    final long baseOffset = instruction.getAddress().toLong() * 0x100;
    final List<? extends IOperandTree> operands = instruction.getOperands();
    final OperandSize archSize = environment.getArchitectureSize();
    final OperandSize resultSize = TranslationHelpers.getNextSize(archSize);
    final String truncateMask = String.valueOf(TranslationHelpers.getAllBitsMask(archSize));
    final String loopTarget = Helpers.getLeafValue(operands.get(0).getRootNode());
    final String tempEcx = environment.getNextVariableString();
    // Decrement ECX and truncate overflows
    instructions.add(ReilHelpers.createSub(baseOffset, archSize, "ecx", archSize, "1", archSize, tempEcx));
    instructions.add(ReilHelpers.createAnd(baseOffset + 1, resultSize, tempEcx, archSize, truncateMask, archSize, "ecx"));
    // Jump if ECX != 0
    instructions.add(ReilHelpers.createJcc(baseOffset + 2, archSize, "ecx", archSize, loopTarget));
}

Example 7 with InternalTranslationException

use of com.google.security.zynamics.reil.translators.InternalTranslationException in project binnavi by google.

the class AdcTranslator method translate.

/**
   * Translates an ADC instruction to REIL code.
   *
   * @param environment A valid translation environment
   * @param instruction The ADC instruction to translate
   * @param instructions The generated REIL code will be added to this list
   *
   * @throws InternalTranslationException if any of the arguments are null the passed instruction is
   *         not an ADC instruction
   */
@Override
public void translate(final ITranslationEnvironment environment, final IInstruction instruction, final List<ReilInstruction> instructions) throws InternalTranslationException {
    TranslationHelpers.checkTranslationArguments(environment, instruction, instructions, "adc");
    if (instruction.getOperands().size() != 2) {
        throw new InternalTranslationException("Error: Argument instruction is not an adc instruction (invalid number of operands)");
    }
    final long baseOffset = instruction.getAddress().toLong() * 0x100;
    long offset = baseOffset;
    final List<? extends IOperandTree> operands = instruction.getOperands();
    final IOperandTree targetOperand = operands.get(0);
    final IOperandTree sourceOperand = operands.get(1);
    // Load source operand.
    final TranslationResult sourceResult = Helpers.translateOperand(environment, offset, sourceOperand, true);
    instructions.addAll(sourceResult.getInstructions());
    // Adjust the offset of the next REIL instruction.
    offset = baseOffset + instructions.size();
    // Load destination operand.
    final TranslationResult targetResult = Helpers.translateOperand(environment, offset, targetOperand, true);
    instructions.addAll(targetResult.getInstructions());
    // Adjust the offset of the next REIL instruction.
    offset = baseOffset + instructions.size();
    final OperandSize size = targetResult.getSize();
    final String sourceRegister = sourceResult.getRegister();
    final String targetRegister = targetResult.getRegister();
    final String msbMask = String.valueOf(TranslationHelpers.getMsbMask(size));
    final String carryMask = String.valueOf(Helpers.getCarryMask(size));
    final String truncateMask = String.valueOf(TranslationHelpers.getAllBitsMask(size));
    final String shiftValue = String.valueOf(TranslationHelpers.getShiftMsbLsbMask(size));
    final String shiftCarry = String.valueOf(-size.getBitSize());
    final OperandSize resultSize = TranslationHelpers.getNextSize(size);
    final String msb1 = environment.getNextVariableString();
    final String msb2 = environment.getNextVariableString();
    final String addResultTemp = environment.getNextVariableString();
    final String addResult = environment.getNextVariableString();
    final String msbResult = environment.getNextVariableString();
    final String msbSameBefore = environment.getNextVariableString();
    final String msbSameBeforeNeg = environment.getNextVariableString();
    final String msbChanged = environment.getNextVariableString();
    final String tempOf = environment.getNextVariableString();
    final String tempCf = environment.getNextVariableString();
    final String truncatedResult = environment.getNextVariableString();
    // Isolate the MSBs of the two operands
    instructions.add(ReilHelpers.createAnd(offset, size, sourceRegister, size, msbMask, size, msb1));
    instructions.add(ReilHelpers.createAnd(offset + 1, size, targetRegister, size, msbMask, size, msb2));
    // Perform the addition
    instructions.add(ReilHelpers.createAdd(offset + 2, size, sourceRegister, size, targetRegister, resultSize, addResultTemp));
    instructions.add(ReilHelpers.createAdd(offset + 3, resultSize, addResultTemp, OperandSize.BYTE, Helpers.CARRY_FLAG, resultSize, addResult));
    // Isolate the MSB of the result and put it into the Sign Flag
    instructions.add(ReilHelpers.createAnd(offset + 4, resultSize, addResult, resultSize, msbMask, size, msbResult));
    instructions.add(ReilHelpers.createBsh(offset + 5, size, msbResult, size, shiftValue, OperandSize.BYTE, Helpers.SIGN_FLAG));
    // Find out if the MSB of the two operands were different and whether the MSB of the first
    // operand changed
    instructions.add(ReilHelpers.createXor(offset + 6, size, msb1, size, msb2, size, msbSameBefore));
    instructions.add(ReilHelpers.createXor(offset + 7, size, msbSameBefore, size, msbMask, size, msbSameBeforeNeg));
    instructions.add(ReilHelpers.createXor(offset + 8, size, msb1, size, msbResult, size, msbChanged));
    instructions.add(ReilHelpers.createAnd(offset + 9, size, msbSameBeforeNeg, size, msbChanged, size, tempOf));
    // Write the result into the Overflow Flag
    instructions.add(ReilHelpers.createBsh(offset + 10, size, tempOf, size, shiftValue, OperandSize.BYTE, Helpers.OVERFLOW_FLAG));
    // Update the Carry Flag
    instructions.add(ReilHelpers.createAnd(offset + 11, resultSize, addResult, resultSize, carryMask, resultSize, tempCf));
    instructions.add(ReilHelpers.createBsh(offset + 12, resultSize, tempCf, resultSize, shiftCarry, OperandSize.BYTE, Helpers.CARRY_FLAG));
    // Truncate the result to fit into the target
    instructions.add(ReilHelpers.createAnd(offset + 13, resultSize, addResult, resultSize, truncateMask, size, truncatedResult));
    // Update the Zero Flag
    instructions.add(ReilHelpers.createBisz(offset + 14, size, truncatedResult, OperandSize.BYTE, Helpers.ZERO_FLAG));
    // Write the result of the ADC operation back into the target register
    Helpers.writeBack(environment, offset + 15, targetOperand, truncatedResult, size, targetResult.getAddress(), targetResult.getType(), instructions);
}

Example 8 with InternalTranslationException

use of com.google.security.zynamics.reil.translators.InternalTranslationException in project binnavi by google.

the class AddTranslator method translate.

/**
   * Translates an ADD instruction to REIL code.
   *
   * @param environment A valid translation environment.
   * @param instruction The ADD instruction to translate.
   * @param instructions The generated REIL code will be added to this list
   *
   * @throws InternalTranslationException if any of the arguments are null the passed instruction is
   *         not an ADD instruction
   */
@Override
public void translate(final ITranslationEnvironment environment, final IInstruction instruction, final List<ReilInstruction> instructions) throws InternalTranslationException {
    TranslationHelpers.checkTranslationArguments(environment, instruction, instructions, "add");
    if (instruction.getOperands().size() != 2) {
        throw new InternalTranslationException("Error: Argument instruction is not a add instruction (invalid number of operands)");
    }
    final long baseOffset = instruction.getAddress().toLong() * 0x100;
    long offset = baseOffset;
    final List<? extends IOperandTree> operands = instruction.getOperands();
    final IOperandTree targetOperand = operands.get(0);
    final IOperandTree sourceOperand = operands.get(1);
    // Load source operand.
    final TranslationResult sourceResult = Helpers.translateOperand(environment, offset, sourceOperand, true);
    instructions.addAll(sourceResult.getInstructions());
    // Adjust the offset of the next REIL instruction.
    offset = baseOffset + instructions.size();
    // Load destination operand.
    final TranslationResult targetResult = Helpers.translateOperand(environment, offset, targetOperand, true);
    instructions.addAll(targetResult.getInstructions());
    // Adjust the offset of the next REIL instruction.
    offset = baseOffset + instructions.size();
    final OperandSize size = targetResult.getSize();
    final String sourceRegister = sourceResult.getRegister();
    final String targetRegister = targetResult.getRegister();
    final String msbMask = String.valueOf(TranslationHelpers.getMsbMask(size));
    final String carryMask = String.valueOf(Helpers.getCarryMask(size));
    final String truncateMask = String.valueOf(TranslationHelpers.getAllBitsMask(size));
    final String shiftValue = String.valueOf(TranslationHelpers.getShiftMsbLsbMask(size));
    final String shiftCarry = String.valueOf(-size.getBitSize());
    final OperandSize resultSize = TranslationHelpers.getNextSize(size);
    final String msb1 = environment.getNextVariableString();
    final String msb2 = environment.getNextVariableString();
    final String addResult = environment.getNextVariableString();
    final String msbResult = environment.getNextVariableString();
    final String msbSameBefore = environment.getNextVariableString();
    final String msbSameBeforeNeg = environment.getNextVariableString();
    final String msbChanged = environment.getNextVariableString();
    final String tempOf = environment.getNextVariableString();
    final String tempCf = environment.getNextVariableString();
    final String truncatedResult = environment.getNextVariableString();
    // Isolate the MSBs of the two operands
    instructions.add(ReilHelpers.createAnd(offset, size, sourceRegister, size, msbMask, size, msb1));
    instructions.add(ReilHelpers.createAnd(offset + 1, size, targetRegister, size, msbMask, size, msb2));
    // Perform the addition
    instructions.add(ReilHelpers.createAdd(offset + 2, size, sourceRegister, size, targetRegister, resultSize, addResult));
    // Isolate the MSB of the result and put it into the Sign Flag
    instructions.add(ReilHelpers.createAnd(offset + 3, resultSize, addResult, resultSize, msbMask, size, msbResult));
    instructions.add(ReilHelpers.createBsh(offset + 4, size, msbResult, size, shiftValue, OperandSize.BYTE, Helpers.SIGN_FLAG));
    // Find out if the MSB of the two operands were different and whether the MSB of the first
    // operand changed
    instructions.add(ReilHelpers.createXor(offset + 5, size, msb1, size, msb2, size, msbSameBefore));
    instructions.add(ReilHelpers.createXor(offset + 6, size, msbSameBefore, size, msbMask, size, msbSameBeforeNeg));
    instructions.add(ReilHelpers.createXor(offset + 7, size, msb1, size, msbResult, size, msbChanged));
    instructions.add(ReilHelpers.createAnd(offset + 8, size, msbSameBeforeNeg, size, msbChanged, size, tempOf));
    // Write the result into the Overflow Flag
    instructions.add(ReilHelpers.createBsh(offset + 9, size, tempOf, size, shiftValue, OperandSize.BYTE, Helpers.OVERFLOW_FLAG));
    // Update the Carry Flag
    instructions.add(ReilHelpers.createAnd(offset + 10, resultSize, addResult, resultSize, carryMask, resultSize, tempCf));
    instructions.add(ReilHelpers.createBsh(offset + 11, resultSize, tempCf, resultSize, shiftCarry, OperandSize.BYTE, Helpers.CARRY_FLAG));
    // Truncate the result to fit into the target
    instructions.add(ReilHelpers.createAnd(offset + 12, resultSize, addResult, resultSize, truncateMask, size, truncatedResult));
    // Update the Zero Flag
    instructions.add(ReilHelpers.createBisz(offset + 13, size, truncatedResult, OperandSize.BYTE, Helpers.ZERO_FLAG));
    // Write the result of the ADD operation back into the target register
    Helpers.writeBack(environment, offset + 14, targetOperand, truncatedResult, size, targetResult.getAddress(), targetResult.getType(), instructions);
}

Example 9 with InternalTranslationException

use of com.google.security.zynamics.reil.translators.InternalTranslationException in project binnavi by google.

the class AndTranslator method translate.

/**
   * Translates an AND instruction to REIL code.
   *
   * @param environment A valid translation environment
   * @param instruction The AND instruction to translate
   * @param instructions The generated REIL code will be added to this list
   *
   * @throws InternalTranslationException if any of the arguments are null the passed instruction is
   *         not an AND instruction
   */
@Override
public void translate(final ITranslationEnvironment environment, final IInstruction instruction, final List<ReilInstruction> instructions) throws InternalTranslationException {
    TranslationHelpers.checkTranslationArguments(environment, instruction, instructions, "and");
    if (instruction.getOperands().size() != 2) {
        throw new InternalTranslationException("Error: Argument instruction is not a and instruction (invalid number of operands)");
    }
    final long baseOffset = instruction.getAddress().toLong() * 0x100;
    long offset = baseOffset;
    final List<? extends IOperandTree> operands = instruction.getOperands();
    final IOperandTree targetOperand = operands.get(0);
    final IOperandTree sourceOperand = operands.get(1);
    // Load source operand.
    final TranslationResult sourceResult = Helpers.translateOperand(environment, offset, sourceOperand, true);
    instructions.addAll(sourceResult.getInstructions());
    // Adjust the offset of the next REIL instruction.
    offset = baseOffset + instructions.size();
    // Load destination operand.
    final TranslationResult targetResult = Helpers.translateOperand(environment, offset, targetOperand, true);
    instructions.addAll(targetResult.getInstructions());
    // Adjust the offset of the next REIL instruction.
    offset = baseOffset + instructions.size();
    final OperandSize size = targetResult.getSize();
    final String sourceRegister = sourceResult.getRegister();
    final String targetRegister = targetResult.getRegister();
    final String andResult = Helpers.generateAnd(environment, offset, size, sourceRegister, targetRegister, instructions);
    offset = baseOffset + instructions.size();
    // Write the result of the ADD operation back into the target register
    Helpers.writeBack(environment, offset, targetOperand, andResult, size, targetResult.getAddress(), targetResult.getType(), instructions);
    Helpers.writeParityFlag(environment, baseOffset + instructions.size(), size, andResult, instructions);
}

Example 10 with InternalTranslationException

use of com.google.security.zynamics.reil.translators.InternalTranslationException in project binnavi by google.

the class BtTranslator method translate.

/**
   * Translates a BT instruction to REIL code.
   * 
   * @param environment A valid translation environment
   * @param instruction The BT instruction to translate
   * @param instructions The generated REIL code will be added to this list
   * 
   * @throws InternalTranslationException if any of the arguments are null the passed instruction is
   *         not a BT instruction
   */
@Override
public void translate(final ITranslationEnvironment environment, final IInstruction instruction, final List<ReilInstruction> instructions) throws InternalTranslationException {
    TranslationHelpers.checkTranslationArguments(environment, instruction, instructions, "bt");
    if (instruction.getOperands().size() != 2) {
        throw new InternalTranslationException("Error: Argument instruction is not a bt instruction (invalid number of operands)");
    }
    final long baseOffset = instruction.getAddress().toLong() * 0x100;
    long offset = baseOffset;
    final IOperandTree targetOperand = instruction.getOperands().get(0);
    final IOperandTree sourceOperand = instruction.getOperands().get(1);
    // Load the target operand.
    final TranslationResult targetResult = Helpers.translateOperand(environment, offset, targetOperand, true);
    instructions.addAll(targetResult.getInstructions());
    offset = baseOffset + instructions.size();
    // Load the source operand.
    final TranslationResult sourceResult = Helpers.translateOperand(environment, offset, sourceOperand, true);
    instructions.addAll(sourceResult.getInstructions());
    offset = baseOffset + instructions.size();
    final String negatedIndex = environment.getNextVariableString();
    // final String truncatedNegatedIndex = environment.getNextVariableString();
    final String shiftedTarget = environment.getNextVariableString();
    // TODO: Due to a bug in the REIL BSH specification we can not truncate the result
    // of the subtraction here. See the tests for an example of what goes wrong.
    instructions.add(ReilHelpers.createSub(offset++, OperandSize.BYTE, "0", sourceResult.getSize(), sourceResult.getRegister(), OperandSize.WORD, negatedIndex));
    // instructions.add(ReilHelpers.createAnd(offset++, OperandSize.WORD, negatedIndex,
    // OperandSize.BYTE, "255", OperandSize.BYTE, truncatedNegatedIndex));
    instructions.add(ReilHelpers.createBsh(offset++, targetResult.getSize(), targetResult.getRegister(), OperandSize.WORD, negatedIndex, targetResult.getSize(), shiftedTarget));
    instructions.add(ReilHelpers.createAnd(offset++, targetResult.getSize(), shiftedTarget, OperandSize.BYTE, "1", OperandSize.BYTE, Helpers.CARRY_FLAG));
}