TPEF::AOutTextSectionReader Class Reference

#include <AOutTextSectionReader.hh>

Inheritance diagram for TPEF::AOutTextSectionReader:

Collaboration diagram for TPEF::AOutTextSectionReader:

Public Member Functions
virtual	~AOutTextSectionReader ()
Public Member Functions inherited from TPEF::AOutSectionReader
virtual	~AOutSectionReader ()
Public Member Functions inherited from TPEF::SectionReader
virtual	~SectionReader ()

Static Public Attributes
static const int	OFFSET_TO_IMMEDIATE_VALUE = 4

Protected Member Functions
	AOutTextSectionReader ()
virtual Section::SectionType	type () const
virtual void	readData (BinaryStream &stream, Section *section) const
Protected Member Functions inherited from TPEF::AOutSectionReader
	AOutSectionReader ()
virtual BinaryReader *	parent () const
Protected Member Functions inherited from TPEF::SectionReader
	SectionReader ()
virtual void	finalize (Section *section) const

Private Member Functions
void	initializeImmediateMove (BinaryStream &stream, MoveElement *move, ImmediateElement *immediate) const
void	initializeMove (BinaryStream &stream, MoveElement *move) const
void	updateMoveDestination (MoveElement *move, const HalfWord dest) const
void	updateMoveSource (MoveElement *move, const Word src) const
Word	convertAOutIndexToTPEF (const Word reg) const
void	setReference (InstructionElement *elem, SectionOffset sectionOffset, SectionId sectionID) const
	AOutTextSectionReader (const AOutTextSectionReader &)
	Copying not allowed. More...
AOutTextSectionReader &	operator= (const AOutTextSectionReader &)
	Assignment not allowed. More...

Static Private Attributes
static AOutTextSectionReader	proto_
	Prototype to be registered to SectionReader. More...

Additional Inherited Members
Public Types inherited from TPEF::SectionReader
typedef BinaryReader::Length	Length
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::SectionReader
static const SectionReader *	findSectionReader (const Section::SectionType type, const BinaryReader *bReader)
static void	registerSectionReader (const SectionReader *sReader)

Detailed Description

Reads text sections of a.out format.

Definition at line 49 of file AOutTextSectionReader.hh.

Constructor & Destructor Documentation

~AOutTextSectionReader()

TPEF::AOutTextSectionReader::~AOutTextSectionReader ( )

virtual

Destructor.

Definition at line 71 of file AOutTextSectionReader.cc.

                                              {
}

AOutTextSectionReader() [1/2]

TPEF::AOutTextSectionReader::AOutTextSectionReader ( )

protected

Constructor.

Registers itself to SectionReader.

Definition at line 64 of file AOutTextSectionReader.cc.

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

References TPEF::SectionReader::registerSectionReader().

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AOutTextSectionReader() [2/2]

TPEF::AOutTextSectionReader::AOutTextSectionReader ( const AOutTextSectionReader &  )

private

Copying not allowed.

Member Function Documentation

convertAOutIndexToTPEF()

Word TPEF::AOutTextSectionReader::convertAOutIndexToTPEF ( const Word  reg ) const

private

Convert an a.out register index into a TPEF register index.

Service helper method. The callers are responsible for ensuring that the given register index is within the allowed range.

Parameters

reg	A.out index of the register.

Returns

The TPEF index of the same register.

Definition at line 209 of file AOutTextSectionReader.cc.

                                                            {
 
    // NOTE: This implementation depends on AOutSymbolSectionReader
    //       implementation  (Where resource section is read).
 
    // offset to first index of given register class
    int regOffset = 0;
 
    // int reg
    if (reg < AOutReader::FIRST_FP_REGISTER) {
        regOffset = AOutReader::FIRST_INT_REGISTER;
 
    // fp reg
    } else if (reg < AOutReader::FIRST_BOOL_REGISTER) {
        regOffset = AOutReader::FIRST_FP_REGISTER;
 
    // bool register
    } else if (reg < AOutReader::FIRST_FU_REGISTER) {
        regOffset = AOutReader::FIRST_BOOL_REGISTER;
 
    // fu or special register
    } else {
        regOffset = 0;
    }
 
    return reg - regOffset;
}

References TPEF::AOutReader::FIRST_BOOL_REGISTER, TPEF::AOutReader::FIRST_FP_REGISTER, TPEF::AOutReader::FIRST_FU_REGISTER, and TPEF::AOutReader::FIRST_INT_REGISTER.

Referenced by updateMoveDestination(), and updateMoveSource().

initializeImmediateMove()

void TPEF::AOutTextSectionReader::initializeImmediateMove ( BinaryStream &  stream, MoveElement *  move, ImmediateElement *  immediate  ) const

private

The attributes of move that has immediate in its source field are initialized.

Immediate value of a move is modeled as a separate object.

Parameters

stream	Stream to be read from.
move	Move to be initialized
immediate	Immediate to be initialized.

Exceptions

OutOfRange	If destination register index is too large.
UnreachableStream	If there occurs problems with stream.

Definition at line 162 of file AOutTextSectionReader.cc.

                                       {
    move->setSourceType(MoveElement::MF_IMM);
 
    // mark every immediate to be inline encoded
    immediate->setDestinationUnit(ResourceElement::INLINE_IMM);
    immediate->setDestinationIndex(0);
 
    // mark move source to match immediate
    move->setSourceUnit(ResourceElement::INLINE_IMM);
    move->setSourceIndex(0);
 
    HalfWord dest = stream.readHalfWord();
    updateMoveDestination(move, dest);
 
    immediate->setWord(stream.readWord());
}

References TPEF::ResourceElement::INLINE_IMM, TPEF::MoveElement::MF_IMM, TPEF::BinaryStream::readHalfWord(), TPEF::BinaryStream::readWord(), TPEF::ImmediateElement::setDestinationIndex(), TPEF::ImmediateElement::setDestinationUnit(), TPEF::MoveElement::setSourceIndex(), TPEF::MoveElement::setSourceType(), TPEF::MoveElement::setSourceUnit(), TPEF::ImmediateElement::setWord(), and updateMoveDestination().

Referenced by readData().

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initializeMove()

void TPEF::AOutTextSectionReader::initializeMove ( BinaryStream &  stream, MoveElement *  move  ) const

private

Initializes an 'ordinary' Move.

Parameters

stream	Stream to be read from.
move	Move to be initialized.

Exceptions

OutOfRange	If destination or source register index is too big.
UnreachableStream	If there occurs problems with stream.

Definition at line 190 of file AOutTextSectionReader.cc.

                                                   {
    HalfWord dest = stream.readHalfWord();
    updateMoveDestination(move, dest);
 
    Word src = stream.readWord();
    updateMoveSource(move, src);
}

References TPEF::BinaryStream::readHalfWord(), TPEF::BinaryStream::readWord(), updateMoveDestination(), and updateMoveSource().

Referenced by readData().

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operator=()

AOutTextSectionReader& TPEF::AOutTextSectionReader::operator= ( const AOutTextSectionReader &  )

private

Assignment not allowed.

readData()

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

protectedvirtual

Reads all Moves from stream and stores them in to Section.

One move consists of 4 fields: guard (Byte), immediate (Byte), destination index (HalfWord), and source index (Word). If immediate is 1 then the source field of the move contains an immediate value.

Parameters

stream	Stream to be read from.
section	Pointer to section in which information is 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 values were out of range.
WrongSubclass	Some class couldn't do what it was asked for.
UnexpectedValue	If there was unexpected value when reading.

Implements TPEF::SectionReader.

Definition at line 101 of file AOutTextSectionReader.cc.

                                                                            {
    AOutReader* aOutReader = dynamic_cast<AOutReader*>(parent());
 
    FileOffset offset = stream.readPosition();
    Word length = aOutReader->header().sectionSizeText();
 
    while (stream.readPosition() < offset + length) {
 
        SectionOffset sectionOffset = stream.readPosition() - offset;
 
        // we must first discover whether instruction is immediate or not
        Byte guard = stream.readByte();
        Byte imm = stream.readByte();
 
        MoveElement* move = new MoveElement();
        ImmediateElement* immediate = NULL;
 
        // guard register is the only boolean register of a.out binaries
        assert((guard == 0) || (guard == '!') || (guard == '?'));
        move->setGuardUnit(ResourceElement::BOOL_RF);
        move->setGuardIndex(0);
        move->setGuardType(MoveElement::MF_RF);
        move->setGuarded(guard != 0);
        move->setGuardInverted(guard == '!');
 
        // always use universal bus
        move->setBus(ResourceElement::UNIVERSAL_BUS);
 
        if (imm == 1) {
            immediate = new ImmediateElement();
            initializeImmediateMove(stream, move, immediate);
            immediate->setBegin(true);
            section->addElement(immediate);
            section->addElement(move);
 
            // set reference pointing immediate, since move is never
            // referenced
            setReference(immediate, sectionOffset, AOutReader::ST_TEXT);
 
        } else {
            initializeMove(stream, move);
            move->setBegin(true);
            section->addElement(move);
            setReference(move, sectionOffset, AOutReader::ST_TEXT);
        }
    }
}

References TPEF::Section::addElement(), assert, TPEF::ResourceElement::BOOL_RF, TPEF::AOutReader::header(), initializeImmediateMove(), initializeMove(), TPEF::MoveElement::MF_RF, TPEF::AOutSectionReader::parent(), TPEF::BinaryStream::readByte(), TPEF::BinaryStream::readPosition(), TPEF::AOutReader::Header::sectionSizeText(), TPEF::InstructionElement::setBegin(), TPEF::MoveElement::setBus(), TPEF::MoveElement::setGuarded(), TPEF::MoveElement::setGuardIndex(), TPEF::MoveElement::setGuardInverted(), TPEF::MoveElement::setGuardType(), TPEF::MoveElement::setGuardUnit(), setReference(), TPEF::AOutReader::ST_TEXT, and TPEF::ResourceElement::UNIVERSAL_BUS.

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setReference()

void TPEF::AOutTextSectionReader::setReference ( InstructionElement *  elem, SectionOffset  sectionOffset, SectionId  sectionID  ) const

private

Sets references to ReferenceManager to enable referencing if it's needed later.

Parameters

elem	Element to be registered to ReferenceManager.
sectionOffset	The offset of the element in the section.
sectionID	Identification code of the referenced section.

Exceptions

KeyAlreadyExists

If registration fails because of existing key.

Definition at line 319 of file AOutTextSectionReader.cc.

                               {
    SectionOffsetKey offKey = SectionOffsetKey(sectionID, sectionOffset);
    SafePointer::addObjectReference(offKey, elem);
}

References TPEF::ReferenceManager::SafePointer::addObjectReference().

Referenced by readData().

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type()

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

protectedvirtual

Returns section type which reader can read.

Returns

The type of the section that reader can read.

Implements TPEF::SectionReader.

Definition at line 80 of file AOutTextSectionReader.cc.

                                  {
    return Section::ST_CODE;
}

References TPEF::Section::ST_CODE.

updateMoveDestination()

void TPEF::AOutTextSectionReader::updateMoveDestination ( MoveElement *  move, const HalfWord  dest  ) const

private

Convert an a.out register index to a TPEF register index and update the destination of the given move to reflect the given register index.

Possible values of move destination field are indices of: integer registers, floating point registers, Boolean registers, or function unit registers. The type of the move destination is also set.

Parameters

move	The Move to be updated.
dest	Index of the destination register.

Exceptions

OutOfRange

If destination index is too large.

Definition at line 250 of file AOutTextSectionReader.cc.

                                                  {
    if (dest < AOutReader::FIRST_FP_REGISTER) {
        move->setDestinationUnit(ResourceElement::INT_RF);
        move->setDestinationType(MoveElement::MF_RF);
 
    } else if (dest < AOutReader::FIRST_BOOL_REGISTER) {
        move->setDestinationUnit(ResourceElement::FP_RF);
        move->setDestinationType(MoveElement::MF_RF);
 
    } else if (dest < AOutReader::FIRST_FU_REGISTER) {
        move->setDestinationUnit(ResourceElement::BOOL_RF);
        move->setDestinationType(MoveElement::MF_RF);
 
    } else {
        // for special registers move type fields is same that for fu
        move->setDestinationUnit(ResourceElement::UNIVERSAL_FU);
        move->setDestinationType(MoveElement::MF_UNIT);
    }
 
    move->setDestinationIndex(convertAOutIndexToTPEF(dest));
}

References TPEF::ResourceElement::BOOL_RF, convertAOutIndexToTPEF(), TPEF::AOutReader::FIRST_BOOL_REGISTER, TPEF::AOutReader::FIRST_FP_REGISTER, TPEF::AOutReader::FIRST_FU_REGISTER, TPEF::ResourceElement::FP_RF, TPEF::ResourceElement::INT_RF, TPEF::MoveElement::MF_RF, TPEF::MoveElement::MF_UNIT, TPEF::MoveElement::setDestinationIndex(), TPEF::MoveElement::setDestinationType(), TPEF::MoveElement::setDestinationUnit(), and TPEF::ResourceElement::UNIVERSAL_FU.

Referenced by initializeImmediateMove(), and initializeMove().

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updateMoveSource()

void TPEF::AOutTextSectionReader::updateMoveSource ( MoveElement *  move, const Word  src  ) const

private

Convert an a.out register index to a TPEF register index and update the source of the given move to reflect the given register index.

Possible values of move source field are indices of: integer registers, floating point registers, Boolean registers, or function unit registers. The type of the move source is also set.

Parameters

move	The Move to be updated.
src	Index of the source register.

Exceptions

OutOfRange

If source index is too large.

Definition at line 286 of file AOutTextSectionReader.cc.

                                             {
    if (src < AOutReader::FIRST_FP_REGISTER) {
        move->setSourceUnit(ResourceElement::INT_RF);
        move->setSourceType(MoveElement::MF_RF);
 
    } else if (src < AOutReader::FIRST_BOOL_REGISTER) {
        move->setSourceUnit(ResourceElement::FP_RF);
        move->setSourceType(MoveElement::MF_RF);
 
    } else if (src < AOutReader::FIRST_FU_REGISTER) {
        move->setSourceUnit(ResourceElement::BOOL_RF);
        move->setSourceType(MoveElement::MF_RF);
 
    } else {
        // for special registers move type fields is same that for fu
        move->setSourceUnit(ResourceElement::UNIVERSAL_FU);
        move->setSourceType(MoveElement::MF_UNIT);
    }
 
    move->setSourceIndex(convertAOutIndexToTPEF(src));
}

References TPEF::ResourceElement::BOOL_RF, convertAOutIndexToTPEF(), TPEF::AOutReader::FIRST_BOOL_REGISTER, TPEF::AOutReader::FIRST_FP_REGISTER, TPEF::AOutReader::FIRST_FU_REGISTER, TPEF::ResourceElement::FP_RF, TPEF::ResourceElement::INT_RF, TPEF::MoveElement::MF_RF, TPEF::MoveElement::MF_UNIT, TPEF::MoveElement::setSourceIndex(), TPEF::MoveElement::setSourceType(), TPEF::MoveElement::setSourceUnit(), and TPEF::ResourceElement::UNIVERSAL_FU.

Referenced by initializeMove().

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Member Data Documentation

OFFSET_TO_IMMEDIATE_VALUE

const int TPEF::AOutTextSectionReader::OFFSET_TO_IMMEDIATE_VALUE = 4

static

Definition at line 51 of file AOutTextSectionReader.hh.

Referenced by TPEF::AOutRelocationSectionReader::initializeRelocElement().

proto_

AOutTextSectionReader TPEF::AOutTextSectionReader::proto_

staticprivate

Prototype to be registered to SectionReader.

Definition at line 84 of file AOutTextSectionReader.hh.

---

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

• AOutTextSectionReader.hh
• AOutTextSectionReader.cc