TPEF::TPEFSymbolSectionReader Class Reference

#include <TPEFSymbolSectionReader.hh>

Inheritance diagram for TPEF::TPEFSymbolSectionReader:

Collaboration diagram for TPEF::TPEFSymbolSectionReader:

Protected Member Functions
	TPEFSymbolSectionReader ()
virtual	~TPEFSymbolSectionReader ()
virtual void	readData (BinaryStream &stream, Section *section) const
virtual Section::SectionType	type () const
Protected Member Functions inherited from TPEF::TPEFSectionReader
	TPEFSectionReader ()
virtual BinaryReader *	parent () const
virtual void	readInfo (BinaryStream &stream, Section *sect) const
Protected Member Functions inherited from TPEF::SectionReader
	SectionReader ()
virtual void	finalize (Section *section) const

Private Member Functions
	TPEFSymbolSectionReader (const TPEFSymbolSectionReader &)
	Copying not allowed.
TPEFSymbolSectionReader &	operator= (TPEFSymbolSectionReader &)
	Assignment not allowed.
SymbolElement *	createSymbol (SymbolElement::SymbolType symType, Word aValue, Word aSize, SectionId sectToBelong) const

Static Private Attributes
static const Byte	SYMBOL_TYPE_MASK = 0x0F
	Mask for getting type of symbol from st_info field of symbol element.
static TPEFSymbolSectionReader	proto_
	Prototype instance of TPEFSymbolSectionReader to be registered to SectionReader.

Additional Inherited Members
Public Types inherited from TPEF::SectionReader
typedef BinaryReader::Length	Length
Public Member Functions inherited from TPEF::TPEFSectionReader
virtual	~TPEFSectionReader ()
Public Member Functions inherited from TPEF::SectionReader
virtual	~SectionReader ()
Static Public Member Functions inherited from TPEF::SectionReader
static void	readSection (BinaryStream &stream, Section *section, BinaryReader *reader)
static void	finalizeBinary (Binary *binaryToFinalize, BinaryReader *reader)
Static Protected Member Functions inherited from TPEF::TPEFSectionReader
static const Header &	header ()
Static Protected Member Functions inherited from TPEF::SectionReader
static const SectionReader *	findSectionReader (const Section::SectionType type, const BinaryReader *bReader)
static void	registerSectionReader (const SectionReader *sReader)

Detailed Description

Reads symbol section from TPEF binary file.

Definition at line 47 of file TPEFSymbolSectionReader.hh.

Constructor & Destructor Documentation

TPEFSymbolSectionReader() [1/2]

TPEF::TPEFSymbolSectionReader::TPEFSymbolSectionReader ( )

protected

Constructor.

Registers itself to SectionReader.

Definition at line 70 of file TPEFSymbolSectionReader.cc.

                                                 : TPEFSectionReader() {
    SectionReader::registerSectionReader(this);
}

References TPEF::SectionReader::registerSectionReader().

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~TPEFSymbolSectionReader()

TPEF::TPEFSymbolSectionReader::~TPEFSymbolSectionReader ( )

protectedvirtual

Destructor.

Definition at line 77 of file TPEFSymbolSectionReader.cc.

                                                  {
}

TPEFSymbolSectionReader() [2/2]

TPEF::TPEFSymbolSectionReader::TPEFSymbolSectionReader ( const TPEFSymbolSectionReader &  )

private

Copying not allowed.

Member Function Documentation

createSymbol()

SymbolElement * TPEF::TPEFSymbolSectionReader::createSymbol ( SymbolElement::SymbolType  symType, Word  aValue, Word  aSize, SectionId  sectToBelong  ) const

private

Creates symbol element.

Parameters

symType	Type of symbol to create.
aValue	Value of element.
aSize	Size of element.
sectToBelong	Identification code of the section that contains the element.

Returns

Newly created symbol.

Definition at line 203 of file TPEFSymbolSectionReader.cc.

                                  {
 
    SymbolElement *elem = NULL;
 
    // NOTE: check symbols from latest spec and
    // add whole element reading stuff here.
    switch (symType) {
    case SymbolElement::STT_NOTYPE:
        elem = new NoTypeSymElement();
        break;
 
    case SymbolElement::STT_PROCEDURE:
        elem = new ProcedSymElement();
        /* fall through */
 
    case SymbolElement::STT_CODE:
        if (elem == NULL) {
            elem = new CodeSymElement();
        }
 
        if (sectToBelong != 0) {
            SectionOffsetKey sOffKey(sectToBelong, aValue);
            dynamic_cast<CodeSymElement*>
                (elem)->setReference(CREATE_SAFEPOINTER(sOffKey));
            dynamic_cast<CodeSymElement*>
                (elem)->setSize(aSize);
        }
 
        break;
 
    case SymbolElement::STT_DATA:
        elem = new DataSymElement();
 
        if (sectToBelong != 0) {
            SectionOffsetKey sOffKey(sectToBelong, aValue);
            dynamic_cast<DataSymElement*>
                (elem)->setReference(CREATE_SAFEPOINTER(sOffKey));
 
            dynamic_cast<DataSymElement*>
                (elem)->setSize(aSize);
        }
 
        break;
 
    case SymbolElement::STT_SECTION:
        elem = new SectionSymElement();
        dynamic_cast<SectionSymElement*>(elem)->setValue(aValue);
        dynamic_cast<SectionSymElement*>(elem)->setSize(aSize);
        break;
 
    case SymbolElement::STT_FILE:
        elem = new FileSymElement();
        dynamic_cast<FileSymElement*>(elem)->setValue(aValue);
        break;
 
    default:
        ;
    }
 
    return elem;
}

References TPEF::SymbolElement::STT_CODE, TPEF::SymbolElement::STT_DATA, TPEF::SymbolElement::STT_FILE, TPEF::SymbolElement::STT_NOTYPE, TPEF::SymbolElement::STT_PROCEDURE, and TPEF::SymbolElement::STT_SECTION.

Referenced by readData().

operator=()

TPEFSymbolSectionReader & TPEF::TPEFSymbolSectionReader::operator= ( TPEFSymbolSectionReader &  )

private

Assignment not allowed.

readData()

void TPEF::TPEFSymbolSectionReader::readData ( BinaryStream &  stream, Section *  section  ) const

protectedvirtual

Reads section data from TPEF binary file.

Parameters

stream	Stream to be read from.
section	Section where the information is to be stored.

Exceptions

UnreachableStream	If reading of section fails.
KeyAlreadyExists	Key was in use when trying to register object.
EndOfFile	If end of file were reached while it shouldn't.
OutOfRange	Some of read value were out of range.
WrongSubclass	Some class couldn't do what it was asked for.
UnexpectedValue	If there was unexpected value when reading.

Reimplemented from TPEF::TPEFSectionReader.

Definition at line 103 of file TPEFSymbolSectionReader.cc.

                                                  {
    // base classes implementation must be called with these.
    TPEFSectionReader::readData(stream, section);
 
    SymbolSection* symbolSection =
        dynamic_cast<SymbolSection*>(section);
    assert(symbolSection != NULL);
 
    // create indexs' starting from 0 undefined element is checked
    SectionIndex index = 0;
    bool undefSymbolDefined = false;
 
    // check that link section is defined properly
    assert(header().linkId != 0);
 
    if (!section->noBits()) {
        // start of first element
        SectionOffset elementStart = header().bodyOffset;
 
        while (elementStart + header().elementSize <=
               header().bodyOffset + header().bodyLength) {
 
            SymbolElement *elem = NULL;
 
            Word nameOffset = stream.readWord();
            Word value = stream.readWord();
            Word size = stream.readWord();
            Byte info = stream.readByte();
            Byte otherField = stream.readByte();
 
            SectionId sectionToBelong = stream.readHalfWord();
 
            // lower half byte is type of symbol
            SymbolType typeOfSym =
                static_cast<SymbolType>(info & SYMBOL_TYPE_MASK);
 
            // upper half byte is binding
            SymbolBinding binding =
                static_cast<SymbolBinding>(info >> (BYTE_BITWIDTH / 2));
 
            // symbol of right type
            elem = createSymbol(typeOfSym, value, size, sectionToBelong);
 
            elem->setAbsolute(otherField & TPEFHeaders::STO_ABS);
            elem->setBinding(binding);
 
            SectionOffsetKey sOffKey(header().linkId, nameOffset);
            elem->setName(CREATE_SAFEPOINTER(sOffKey));
 
            // section which to symbol belongs
            SectionKey sKey(sectionToBelong);
            elem->setSection(CREATE_SAFEPOINTER(sKey));
 
            SectionIndexKey sectionIndexKey(header().sectionId, index);
            SafePointer::addObjectReference(sectionIndexKey, elem);
 
 
            // check undefined symbol
            if (index == 0) {
                assert(elem->type() == SymbolElement::STT_NOTYPE);
                assert(elem->binding() == SymbolElement::STB_LOCAL);
                assert(elem->absolute() == true);
                assert(nameOffset == 0);
                undefSymbolDefined = true;
            }
 
            section->addElement(elem);
 
            elementStart += header().elementSize;
            stream.setReadPosition(elementStart);
            index++;
        }
    }
 
    // create undefined symbol if not found from table
    // (e.g. if section had nobits flag set)
    if (!undefSymbolDefined) {
        NoTypeSymElement* elem = new NoTypeSymElement();
        elem->setBinding(SymbolElement::STB_LOCAL);
        elem->setAbsolute(true);
        SectionOffsetKey sOffKey(header().linkId, 0);
        elem->setName(CREATE_SAFEPOINTER(sOffKey));
        SectionIndexKey sectionIndexKey(header().sectionId, 0);
        SafePointer::addObjectReference(sectionIndexKey, elem);
        section->addElement(elem);
    }
}

References TPEF::SymbolElement::absolute(), TPEF::Section::addElement(), TPEF::ReferenceManager::SafePointer::addObjectReference(), assert, TPEF::SymbolElement::binding(), TPEF::TPEFSectionReader::Header::bodyOffset, BYTE_BITWIDTH, createSymbol(), TPEF::TPEFSectionReader::Header::elementSize, TPEF::TPEFSectionReader::header(), TPEF::Section::noBits(), TPEF::BinaryStream::readByte(), TPEF::TPEFSectionReader::readData(), TPEF::BinaryStream::readHalfWord(), TPEF::BinaryStream::readWord(), TPEF::SymbolElement::setAbsolute(), TPEF::SymbolElement::setBinding(), TPEF::SymbolElement::setName(), TPEF::BinaryStream::setReadPosition(), TPEF::SymbolElement::setSection(), TPEF::SymbolElement::STB_LOCAL, TPEF::TPEFHeaders::STO_ABS, TPEF::SymbolElement::STT_NOTYPE, SYMBOL_TYPE_MASK, and TPEF::SymbolElement::type().

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type()

Section::SectionType TPEF::TPEFSymbolSectionReader::type ( ) const

protectedvirtual

Returns the type of section it is meant to read.

Returns

The type of section it can read.

Implements TPEF::SectionReader.

Definition at line 86 of file TPEFSymbolSectionReader.cc.

                                    {
    return Section::ST_SYMTAB;
}

References TPEF::Section::ST_SYMTAB.

Member Data Documentation

proto_

TPEFSymbolSectionReader TPEF::TPEFSymbolSectionReader::proto_

staticprivate

Prototype instance of TPEFSymbolSectionReader to be registered to SectionReader.

Definition at line 72 of file TPEFSymbolSectionReader.hh.

SYMBOL_TYPE_MASK

const Byte TPEF::TPEFSymbolSectionReader::SYMBOL_TYPE_MASK = 0x0F

staticprivate

Mask for getting type of symbol from st_info field of symbol element.

Definition at line 69 of file TPEFSymbolSectionReader.hh.

Referenced by readData().

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The documentation for this class was generated from the following files:

• TPEFSymbolSectionReader.hh
• TPEFSymbolSectionReader.cc