#include <MCObjectWriter.h>

Inheritance diagram for llvm::MCObjectWriter:

Collaboration diagram for llvm::MCObjectWriter:

Public Member Functions
virtual	~MCObjectWriter ()

virtual void	reset ()
	lifetime management More...

bool	isLittleEndian () const

raw_ostream &	getStream ()

High-Level API
virtual void	ExecutePostLayoutBinding (MCAssembler &Asm, const MCAsmLayout &Layout)=0
	Perform any late binding of symbols (for example, to assign symbol indices for use when generating relocations). More...

virtual void	RecordRelocation (const MCAssembler &Asm, const MCAsmLayout &Layout, const MCFragment *Fragment, const MCFixup &Fixup, MCValue Target, uint64_t &FixedValue)=0
	Record a relocation entry. More...

bool	IsSymbolRefDifferenceFullyResolved (const MCAssembler &Asm, const MCSymbolRefExpr A, const MCSymbolRefExpr B, bool InSet) const
	Check whether the difference (A - B) between two symbol references is fully resolved. More...

virtual bool	IsSymbolRefDifferenceFullyResolvedImpl (const MCAssembler &Asm, const MCSymbolData &DataA, const MCFragment &FB, bool InSet, bool IsPCRel) const

virtual void	WriteObject (MCAssembler &Asm, const MCAsmLayout &Layout)=0
	Write the object file. More...

Binary Output
void	Write8 (uint8_t Value)

void	WriteLE16 (uint16_t Value)

void	WriteLE32 (uint32_t Value)

void	WriteLE64 (uint64_t Value)

void	WriteBE16 (uint16_t Value)

void	WriteBE32 (uint32_t Value)

void	WriteBE64 (uint64_t Value)

void	Write16 (uint16_t Value)

void	Write32 (uint32_t Value)

void	Write64 (uint64_t Value)

void	WriteZeros (unsigned N)

void	WriteBytes (const SmallVectorImpl< char > &ByteVec, unsigned ZeroFillSize=0)

void	WriteBytes (StringRef Str, unsigned ZeroFillSize=0)

Protected Member Functions
	MCObjectWriter (raw_ostream &_OS, bool _IsLittleEndian)

Protected Attributes
raw_ostream &	OS

unsigned	IsLittleEndian: 1

Detailed Description

MCObjectWriter - Defines the object file and target independent interfaces used by the assembler backend to write native file format object files.

The object writer contains a few callbacks used by the assembler to allow the object writer to modify the assembler data structures at appropriate points. Once assembly is complete, the object writer is given the MCAssembler instance, which contains all the symbol and section data which should be emitted as part of WriteObject().

The object writer also contains a number of helper methods for writing binary data to the output stream.

Definition at line 39 of file MCObjectWriter.h.

Constructor & Destructor Documentation

llvm::MCObjectWriter::MCObjectWriter	(	raw_ostream &	_OS,
		bool	_IsLittleEndian
	)

inlineprotected

Definition at line 49 of file MCObjectWriter.h.

MCObjectWriter::~MCObjectWriter ( )

virtual

Definition at line 17 of file MCObjectWriter.cpp.

Member Function Documentation

virtual void llvm::MCObjectWriter::ExecutePostLayoutBinding	(	MCAssembler &	Asm,
		const MCAsmLayout &	Layout
	)

pure virtual

Perform any late binding of symbols (for example, to assign symbol indices for use when generating relocations).

This routine is called by the assembler after layout and relaxation is complete.

Implemented in llvm::MachObjectWriter.

Referenced by llvm::MCAssembler::Finish().

raw_ostream& llvm::MCObjectWriter::getStream ( )

inline

Definition at line 60 of file MCObjectWriter.h.

References OS.

Referenced by writeFragment(), and llvm::MCAssembler::writeSectionData().

bool llvm::MCObjectWriter::isLittleEndian ( ) const

inline

Definition at line 58 of file MCObjectWriter.h.

References IsLittleEndian.

bool MCObjectWriter::IsSymbolRefDifferenceFullyResolved	(	const MCAssembler &	Asm,
		const MCSymbolRefExpr *	A,
		const MCSymbolRefExpr *	B,
		bool	InSet
	)		const

Check whether the difference (A - B) between two symbol references is fully resolved.

Clients are not required to answer precisely and may conservatively return false, even when a difference is fully resolved.

Definition at line 21 of file MCObjectWriter.cpp.

References llvm::MCSymbol::AliasedSymbol(), llvm::MCSymbolData::getFragment(), llvm::MCSymbolRefExpr::getKind(), llvm::MCSymbolRefExpr::getSymbol(), llvm::MCAssembler::getSymbolData(), IsSymbolRefDifferenceFullyResolvedImpl(), llvm::MCSymbol::isUndefined(), and llvm::MCSymbolRefExpr::VK_None.

bool MCObjectWriter::IsSymbolRefDifferenceFullyResolvedImpl	(	const MCAssembler &	Asm,
		const MCSymbolData &	DataA,
		const MCFragment &	FB,
		bool	InSet,
		bool	IsPCRel
	)		const

virtual

Reimplemented in llvm::MachObjectWriter.

Definition at line 47 of file MCObjectWriter.cpp.

References llvm::MCSymbol::AliasedSymbol(), llvm::MCFragment::getParent(), llvm::MCSymbol::getSection(), llvm::MCSectionData::getSection(), and llvm::MCSymbolData::getSymbol().

Referenced by IsSymbolRefDifferenceFullyResolved().

virtual void llvm::MCObjectWriter::RecordRelocation	(	const MCAssembler &	Asm,
		const MCAsmLayout &	Layout,
		const MCFragment *	Fragment,
		const MCFixup &	Fixup,
		MCValue	Target,
		uint64_t &	FixedValue
	)

pure virtual

Record a relocation entry.

This routine is called by the assembler after layout and relaxation, and post layout binding. The implementation is responsible for storing information about the relocation so that it can be emitted during WriteObject().

Implemented in llvm::MachObjectWriter.

virtual void llvm::MCObjectWriter::reset ( )

inlinevirtual

lifetime management

Reimplemented in llvm::MachObjectWriter.

Definition at line 56 of file MCObjectWriter.h.

Referenced by llvm::MachObjectWriter::reset(), and llvm::MCAssembler::reset().

void llvm::MCObjectWriter::Write16 ( uint16_t Value )

inline

Definition at line 149 of file MCObjectWriter.h.

References IsLittleEndian, WriteBE16(), and WriteLE16().

Referenced by writeFragment(), llvm::MachObjectWriter::WriteNlist(), and llvm::MachObjectWriter::WriteObject().