DisassembleCommand.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
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    the rights to use, copy, modify, merge, publish, distribute, sublicense,
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    Software is furnished to do so, subject to the following conditions:
 
    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.
 
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 */
/**
 * @file DisassembleCommand.cc
 *
 * Implementation of DisassembleCommand class
 *
 * @author Pekka Jääskeläinen 2005 (pjaaskel-no.spam-cs.tut.fi)
 * @authoe Henry Linjamäki 2017 (henry.linjamaki-no.spam-tut.fi)
 * @note rating: red
 */
 
#include "DisassembleCommand.hh"
#include "Application.hh"
#include "FileSystem.hh"
#include "SimulatorFrontend.hh"
#include "SimulatorInterpreterContext.hh"
#include "SimControlLanguageCommand.hh"
#include "Exception.hh"
#include "SimulatorToolbox.hh"
#include "SimulatorTextGenerator.hh"
#include "SimValue.hh"
#include "Program.hh"
#include "Procedure.hh"
#include "Address.hh"
#include "Instruction.hh"
 
#include <iostream>
 
using namespace TTAProgram;
 
/**
 * Constructor.
 *
 * Sets the name of the command to the base class.
 */
DisassembleCommand::DisassembleCommand() : 
    SimControlLanguageCommand("disassemble") {
}
 
/**
 * Destructor.
 *
 * Does nothing.
 */
DisassembleCommand::~DisassembleCommand() {
}
 
/**
 * Executes the "disassemble" command.
 *
 * Prints a range of meory addresses as machine instructions. When two 
 * arguments addr1, addr2 are given, addr1 specifies the first address of the 
 * range to display, and addr2 specifies the last address (not displayed). If 
 * only one argument, addr1, is given, then the function that contains addr1 
 * is disassembled. If no argument is given, the default memory range is the 
 * function surrounding the program counter of the selected frame.
 *
 * @param arguments The range of instruction memory to disassemble.
 * @return Always true if arguments are valid.
 */
bool
DisassembleCommand::execute(const std::vector<DataObject>& arguments) {
    assert(interpreter() != NULL);
 
    if (!checkArgumentCount(arguments.size() - 1, 0, 2)) {
        return false;
    } 
 
    if (!checkProgramLoaded()) {
        return false;
    }
 
    SimulatorInterpreterContext& interpreterContext = 
        dynamic_cast<SimulatorInterpreterContext&>(interpreter()->context());
 
    SimulatorFrontend& simFront = interpreterContext.simulatorFrontend();
 
    int firstAddress = -1;
    int lastAddress = -1; 
 
    const int programLastAddress =
        simFront.program().lastProcedure().endAddress().location() - 1;
 
    if (arguments.size() > 1) {
        try {
            firstAddress = parseInstructionAddressExpression(
                arguments[1].stringValue());
 
            if (arguments.size() == 3) {
                lastAddress = parseInstructionAddressExpression(
                    arguments[2].stringValue());
            }
        } catch (const IllegalParameters&) {
            return false;
        }
    } 
 
    if (firstAddress > programLastAddress) {
        firstAddress = programLastAddress;
    }
 
 
    for (auto addr : { firstAddress, lastAddress }) {
        try {
            if (addr != -1)
                simFront.program().instructionAt(addr);
        } catch (KeyNotFound& e) {
            interpreter()->setError("No instruction at address "
                + std::to_string(addr) + ".");
            return false;
        }
    }
 
    if (firstAddress == -1 && lastAddress == -1) {
        firstAddress = simFront.currentProcedure().startAddress().location();
        lastAddress =
            simFront.currentProcedure().lastInstruction().address().location();
    } else if (firstAddress != -1 && lastAddress == -1) {
        const Procedure& procedureAtAddress =
            dynamic_cast<const Procedure&>(
                simFront.program().instructionAt(firstAddress).parent());
        firstAddress = procedureAtAddress.startAddress().location();
        lastAddress =
            procedureAtAddress.lastInstruction().address().location();
    }
 
    if (lastAddress < 0) {
        lastAddress = 0;
    }
 
    if (lastAddress > programLastAddress) {
        lastAddress = programLastAddress;
    }
 
    if (lastAddress < firstAddress) {
        lastAddress = firstAddress;
    }
 
    try {
        for (; firstAddress <= lastAddress; firstAddress +=
            simFront.program().instructionAt(firstAddress).size()) {
            outputStream() << simFront.disassembleInstruction(firstAddress)
                           << std::endl;
        }
    } catch (KeyNotFound& e) {
        interpreter()->setError("No instruction at address "
            + std::to_string(firstAddress) + ".");
        return false;
    }
 
    return true;
}
 
/**
 * Returns the help text for this command.
 * 
 * Help text is searched from SimulatorTextGenerator.
 *
 * @return The help text.
 * @todo Use SimulatorTextGenerator to get the help text.
 */
std::string 
DisassembleCommand::helpText() const {
    return SimulatorToolbox::textGenerator().text(
        Texts::TXT_INTERP_HELP_DISASSEMBLE).str();
}