AOutRelocationSectionReader.hh

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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,
    and/or sell copies of the Software, and to permit persons to whom the
    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 AOutRelocationSectionReader.hh
 *
 * Declaration of AOutRelocationSectionReader.
 *
 * @author Jussi Nykänen 2003 (nykanen-no.spam-cs.tut.fi)
 * @author Mikael Lepistö 18.12.2003 (tmlepist-no.spam-cs.tut.fi)
 * @note reviewed 7 October 2003 by jn, ml, tr, ll
 *
 * @note rating: yellow
 */
 
#ifndef TTA_AOUT_RELOCATION_SECTION_READER_HH
#define TTA_AOUT_RELOCATION_SECTION_READER_HH
 
#include "AOutSectionReader.hh"
#include "Section.hh"
#include "TPEFBaseType.hh"
#include "BinaryReader.hh"
#include "Exception.hh"
#include "RelocElement.hh"
 
namespace TPEF {
 
/**
 * Reads relocation sections of a.out binary.
 */
class AOutRelocationSectionReader : public AOutSectionReader {
public:
    virtual ~AOutRelocationSectionReader();
 
protected:
    AOutRelocationSectionReader();
 
    virtual void finalize(Section* section) const;
 
    virtual void readData(BinaryStream& stream, Section* section) const;
 
    virtual Section::SectionType type() const;
 
private:
    /**
     * Relocation types of a.out
     */
    enum RelocType {
        RELOC_8,   ///< 1 byte relocation 
        RELOC_16,  ///< 2 bytes relocation 
        RELOC_32,  ///< 4 bytes relocation
        NO_RELOC   ///< no relocation
    };
 
    void initializeRelocElement(
        BinaryStream& stream, RelocElement* elem, SectionId refSectionID,
        AOutReader* reader) const;
 
    bool checkIfExtern(Word word) const;
 
    /// Copying not allowed.
    AOutRelocationSectionReader(const AOutRelocationSectionReader&);
    /// Assignment not allowed.
    AOutRelocationSectionReader& operator=(AOutRelocationSectionReader&);
 
    RelocElement::RelocType aOutToTPEFRelocType(
        RelocType aOutRelocType) const;
 
    /// Class-wide (unique) prototype instance of AOutRelocationSectionReader
    /// registered into SectionReader.
    static AOutRelocationSectionReader proto_;
 
    /// Mask for extracting relocation type.
    static const Byte RELOCATION_TYPE_MASK;
};
}
 
#include "AOutRelocationSectionReader.icc"
 
#endif