#include "llvm/MC/MCMachObjectWriter.h"

Inheritance diagram for llvm::MachObjectWriter:

Collaboration diagram for llvm::MachObjectWriter:

Public Member Functions
	MachObjectWriter (std::unique_ptr< MCMachObjectTargetWriter > MOTW, raw_pwrite_stream &OS, bool IsLittleEndian)

const MCSymbol &	findAliasedSymbol (const MCSymbol &Sym) const

void	writeHeader (MachO::HeaderFileType Type, unsigned NumLoadCommands, unsigned LoadCommandsSize, bool SubsectionsViaSymbols)

void	writeSegmentLoadCommand (StringRef Name, unsigned NumSections, uint64_t VMAddr, uint64_t VMSize, uint64_t SectionDataStartOffset, uint64_t SectionDataSize, uint32_t MaxProt, uint32_t InitProt)
	Write a segment load command. More...

void	writeSection (const MCAsmLayout &Layout, const MCSection &Sec, uint64_t VMAddr, uint64_t FileOffset, unsigned Flags, uint64_t RelocationsStart, unsigned NumRelocations)

void	writeSymtabLoadCommand (uint32_t SymbolOffset, uint32_t NumSymbols, uint32_t StringTableOffset, uint32_t StringTableSize)

void	writeDysymtabLoadCommand (uint32_t FirstLocalSymbol, uint32_t NumLocalSymbols, uint32_t FirstExternalSymbol, uint32_t NumExternalSymbols, uint32_t FirstUndefinedSymbol, uint32_t NumUndefinedSymbols, uint32_t IndirectSymbolOffset, uint32_t NumIndirectSymbols)

void	writeNlist (MachSymbolData &MSD, const MCAsmLayout &Layout)

void	writeLinkeditLoadCommand (uint32_t Type, uint32_t DataOffset, uint32_t DataSize)

void	writeLinkerOptionsLoadCommand (const std::vector< std::string > &Options)

void	addRelocation (const MCSymbol RelSymbol, const MCSection Sec, MachO::any_relocation_info &MRE)

void	recordScatteredRelocation (const MCAssembler &Asm, const MCAsmLayout &Layout, const MCFragment *Fragment, const MCFixup &Fixup, MCValue Target, unsigned Log2Size, uint64_t &FixedValue)

void	recordTLVPRelocation (const MCAssembler &Asm, const MCAsmLayout &Layout, const MCFragment *Fragment, const MCFixup &Fixup, MCValue Target, uint64_t &FixedValue)

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

void	bindIndirectSymbols (MCAssembler &Asm)

void	computeSymbolTable (MCAssembler &Asm, std::vector< MachSymbolData > &LocalSymbolData, std::vector< MachSymbolData > &ExternalSymbolData, std::vector< MachSymbolData > &UndefinedSymbolData)
	Compute the symbol table data. More...

void	computeSectionAddresses (const MCAssembler &Asm, const MCAsmLayout &Layout)

void	executePostLayoutBinding (MCAssembler &Asm, const MCAsmLayout &Layout) override
	Perform any late binding of symbols (for example, to assign symbol indices for use when generating relocations). More...

bool	isSymbolRefDifferenceFullyResolvedImpl (const MCAssembler &Asm, const MCSymbol &A, const MCSymbol &B, bool InSet) const override

bool	isSymbolRefDifferenceFullyResolvedImpl (const MCAssembler &Asm, const MCSymbol &SymA, const MCFragment &FB, bool InSet, bool IsPCRel) const override

uint64_t	writeObject (MCAssembler &Asm, const MCAsmLayout &Layout) override
	Write the object file and returns the number of bytes written. More...

Lifetime management Methods
void	reset () override
	lifetime management More...

Utility Methods
bool	isFixupKindPCRel (const MCAssembler &Asm, unsigned Kind)

SectionAddrMap &	getSectionAddressMap ()

uint64_t	getSectionAddress (const MCSection *Sec) const

uint64_t	getSymbolAddress (const MCSymbol &S, const MCAsmLayout &Layout) const

uint64_t	getFragmentAddress (const MCFragment *Fragment, const MCAsmLayout &Layout) const

uint64_t	getPaddingSize (const MCSection *SD, const MCAsmLayout &Layout) const

bool	doesSymbolRequireExternRelocation (const MCSymbol &S)

Target Writer Proxy Accessors
bool	is64Bit () const

bool	isX86_64 () const

Public Member Functions inherited from llvm::MCObjectWriter
	MCObjectWriter (const MCObjectWriter &)=delete

MCObjectWriter &	operator= (const MCObjectWriter &)=delete

virtual	~MCObjectWriter ()

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 void	emitAddrsigSection ()
	Tell the object writer to emit an address-significance table during writeObject(). More...

virtual void	addAddrsigSymbol (const MCSymbol *Sym)
	Record the given symbol in the address-significance table to be written diring writeObject(). More...

Public Attributes
support::endian::Writer	W

Additional Inherited Members
Protected Member Functions inherited from llvm::MCObjectWriter
	MCObjectWriter ()=default

Detailed Description

Definition at line 82 of file MCMachObjectWriter.h.

Constructor & Destructor Documentation

◆ MachObjectWriter()

llvm::MachObjectWriter::MachObjectWriter	(	std::unique_ptr< MCMachObjectTargetWriter >	MOTW,
		raw_pwrite_stream &	OS,
		bool	IsLittleEndian
	)

inline

Definition at line 127 of file MCMachObjectWriter.h.

Member Function Documentation

◆ addRelocation()

void llvm::MachObjectWriter::addRelocation	(	const MCSymbol *	RelSymbol,
		const MCSection *	Sec,
		MachO::any_relocation_info &	MRE
	)

inline

Definition at line 228 of file MCMachObjectWriter.h.

References llvm::HexStyle::Asm, B, llvm::createMachObjectWriter(), Fixup, P, and llvm::MCMachObjectTargetWriter::recordRelocation().

Referenced by canUseLocalRelocation(), getARMFixupKindMachOInfo(), getFixupKindLog2Size(), and getFixupOffset().

◆ bindIndirectSymbols()

void MachObjectWriter::bindIndirectSymbols ( MCAssembler & Asm )

Definition at line 461 of file MachObjectWriter.cpp.

References llvm::MCSymbol::getName(), llvm::MCSectionMachO::getType(), llvm::MCAssembler::indirect_symbol_begin(), llvm::MCAssembler::indirect_symbol_end(), llvm::MCAssembler::registerSymbol(), llvm::report_fatal_error(), llvm::MachO::S_LAZY_SYMBOL_POINTERS, llvm::MachO::S_NON_LAZY_SYMBOL_POINTERS, llvm::MachO::S_SYMBOL_STUBS, llvm::MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, llvm::ARMBuildAttrs::Section, and llvm::ARMBuildAttrs::Symbol.

Referenced by executePostLayoutBinding().

◆ computeSectionAddresses()

void MachObjectWriter::computeSectionAddresses	(	const MCAssembler &	Asm,
		const MCAsmLayout &	Layout
	)

strictly be necessary.

Definition at line 626 of file MachObjectWriter.cpp.

References llvm::alignTo(), getPaddingSize(), llvm::MCAsmLayout::getSectionAddressSize(), and llvm::MCAsmLayout::getSectionOrder().

Referenced by executePostLayoutBinding().

◆ computeSymbolTable()

void MachObjectWriter::computeSymbolTable	(	MCAssembler &	Asm,
		std::vector< MachSymbolData > &	LocalSymbolData,
		std::vector< MachSymbolData > &	ExternalSymbolData,
		std::vector< MachSymbolData > &	UndefinedSymbolData
	)

Compute the symbol table data.

computeSymbolTable - Compute the symbol table data

Definition at line 525 of file MachObjectWriter.cpp.

References llvm::StringTableBuilder::add(), assert(), llvm::MCAssembler::begin(), llvm::MCAssembler::end(), llvm::support::endian::Writer::Endian, llvm::StringTableBuilder::finalize(), llvm::StringTableBuilder::getOffset(), llvm::MCAssembler::isSymbolLinkerVisible(), llvm::support::little, llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::lookup(), llvm::ARMBuildAttrs::Section, llvm::sort(), llvm::ARMBuildAttrs::Symbol, llvm::MCAssembler::symbols(), and W.

Referenced by writeObject().

◆ doesSymbolRequireExternRelocation()

bool MachObjectWriter::doesSymbolRequireExternRelocation ( const MCSymbol & S )

Definition at line 54 of file MachObjectWriter.cpp.

References llvm::MCSymbol::isUndefined(), llvm::operator<(), and llvm::ARMBuildAttrs::Symbol.

Referenced by getARMFixupKindMachOInfo(), getFixupKindLog2Size(), and getFixupOffset().

◆ executePostLayoutBinding()

void MachObjectWriter::executePostLayoutBinding	(	MCAssembler &	Asm,
		const MCAsmLayout &	Layout
	)

overridevirtual

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.

Implements llvm::MCObjectWriter.

Definition at line 641 of file MachObjectWriter.cpp.

References bindIndirectSymbols(), and computeSectionAddresses().

◆ findAliasedSymbol()

const MCSymbol & MachObjectWriter::findAliasedSymbol ( const MCSymbol & Sym ) const

Definition at line 325 of file MachObjectWriter.cpp.

References llvm::dyn_cast(), llvm::MCSymbol::getVariableValue(), llvm::MCSymbol::isVariable(), and llvm::Ref.

Referenced by getFixupKindLog2Size(), isSymbolRefDifferenceFullyResolvedImpl(), and writeNlist().

◆ getFragmentAddress()

uint64_t MachObjectWriter::getFragmentAddress	(	const MCFragment *	Fragment,
		const MCAsmLayout &	Layout
	)		const

Definition at line 80 of file MachObjectWriter.cpp.

References llvm::MCAsmLayout::getFragmentOffset(), llvm::MCFragment::getParent(), and getSectionAddress().

Referenced by canUseLocalRelocation(), and getFixupKindLog2Size().

◆ getPaddingSize()

uint64_t MachObjectWriter::getPaddingSize	(	const MCSection *	SD,
		const MCAsmLayout &	Layout
	)		const

Definition at line 119 of file MachObjectWriter.cpp.

References llvm::MCSection::getAlignment(), llvm::MCSection::getLayoutOrder(), getSectionAddress(), llvm::MCAsmLayout::getSectionAddressSize(), llvm::MCAsmLayout::getSectionOrder(), llvm::MCSection::isVirtualSection(), and llvm::OffsetToAlignment().

Referenced by computeSectionAddresses(), and writeObject().

◆ getSectionAddress()

uint64_t llvm::MachObjectWriter::getSectionAddress ( const MCSection * Sec ) const

inline

Definition at line 150 of file MCMachObjectWriter.h.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::lookup().

Referenced by getARMFixupKindMachOInfo(), getFixupKindLog2Size(), getFixupOffset(), getFragmentAddress(), getPaddingSize(), getSymbolAddress(), and writeObject().

◆ getSectionAddressMap()

SectionAddrMap& llvm::MachObjectWriter::getSectionAddressMap ( )

inline

Definition at line 148 of file MCMachObjectWriter.h.

Referenced by getARMFixupKindMachOInfo(), getFixupKindLog2Size(), and getFixupOffset().

◆ getSymbolAddress()

uint64_t MachObjectWriter::getSymbolAddress	(	const MCSymbol &	S,
		const MCAsmLayout &	Layout
	)		const

◆ is64Bit()

bool llvm::MachObjectWriter::is64Bit ( ) const

inline

Definition at line 167 of file MCMachObjectWriter.h.

Referenced by writeLinkerOptionsLoadCommand(), writeNlist(), and writeObject().

◆ isFixupKindPCRel()

bool MachObjectWriter::isFixupKindPCRel	(	const MCAssembler &	Asm,
		unsigned	Kind
	)

Definition at line 73 of file MachObjectWriter.cpp.

References llvm::MCFixupKindInfo::FKF_IsPCRel, llvm::MCFixupKindInfo::Flags, llvm::MCAssembler::getBackend(), and llvm::MCAsmBackend::getFixupKindInfo().

Referenced by canUseLocalRelocation(), getARMFixupKindMachOInfo(), getFixupKindLog2Size(), and getFixupOffset().

◆ isSymbolRefDifferenceFullyResolvedImpl() [1/2]

bool MachObjectWriter::isSymbolRefDifferenceFullyResolvedImpl	(	const MCAssembler &	Asm,
		const MCSymbol &	A,
		const MCSymbol &	B,
		bool	InSet
	)		const

overridevirtual

Reimplemented from llvm::MCObjectWriter.

Definition at line 649 of file MachObjectWriter.cpp.

References llvm::MCObjectWriter::isSymbolRefDifferenceFullyResolvedImpl(), and llvm::MCSymbol::isVariable().

◆ isSymbolRefDifferenceFullyResolvedImpl() [2/2]

bool MachObjectWriter::isSymbolRefDifferenceFullyResolvedImpl	(	const MCAssembler &	Asm,
		const MCSymbol &	SymA,
		const MCFragment &	FB,
		bool	InSet,
		bool	IsPCRel
	)		const

overridevirtual

Reimplemented from llvm::MCObjectWriter.

Definition at line 661 of file MachObjectWriter.cpp.

References findAliasedSymbol(), llvm::MCFragment::getAtom(), llvm::MCSymbol::getFragment(), llvm::MCFragment::getParent(), llvm::MCSymbol::getSection(), llvm::MCAssembler::getSubsectionsViaSymbols(), llvm::MCSymbol::isInSection(), llvm::MCSymbol::isTemporary(), and isX86_64().

◆ isX86_64()

bool llvm::MachObjectWriter::isX86_64 ( ) const

inline

Definition at line 168 of file MCMachObjectWriter.h.

References llvm::MachO::CPU_TYPE_X86_64, and Name.

Referenced by isSymbolRefDifferenceFullyResolvedImpl().

◆ recordRelocation()

void MachObjectWriter::recordRelocation	(	MCAssembler &	Asm,
		const MCAsmLayout &	Layout,
		const MCFragment *	Fragment,
		const MCFixup &	Fixup,
		MCValue	Target,
		uint64_t &	FixedValue
	)

overridevirtual

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().

Implements llvm::MCObjectWriter.

Definition at line 452 of file MachObjectWriter.cpp.

◆ recordScatteredRelocation()

void llvm::MachObjectWriter::recordScatteredRelocation	(	const MCAssembler &	Asm,
		const MCAsmLayout &	Layout,
		const MCFragment *	Fragment,
		const MCFixup &	Fixup,
		MCValue	Target,
		unsigned	Log2Size,
		uint64_t &	FixedValue
	)

◆ recordTLVPRelocation()

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

◆ reset()

void MachObjectWriter::reset ( )

overridevirtual

lifetime management

Reimplemented from llvm::MCObjectWriter.

Definition at line 44 of file MachObjectWriter.cpp.

References llvm::StringTableBuilder::clear(), and llvm::MCObjectWriter::reset().

◆ writeDysymtabLoadCommand()

void MachObjectWriter::writeDysymtabLoadCommand	(	uint32_t	FirstLocalSymbol,
		uint32_t	NumLocalSymbols,
		uint32_t	FirstExternalSymbol,
		uint32_t	NumExternalSymbols,
		uint32_t	FirstUndefinedSymbol,
		uint32_t	NumUndefinedSymbols,
		uint32_t	IndirectSymbolOffset,
		uint32_t	NumIndirectSymbols
	)

Definition at line 277 of file MachObjectWriter.cpp.

Referenced by writeObject().

◆ writeHeader()

void MachObjectWriter::writeHeader	(	MachO::HeaderFileType	Type,
		unsigned	NumLoadCommands,
		unsigned	LoadCommandsSize,
		bool	SubsectionsViaSymbols
	)

Definition at line 132 of file MachObjectWriter.cpp.

References llvm::MachO::MH_SUBSECTIONS_VIA_SYMBOLS.

Referenced by writeObject().

◆ writeLinkeditLoadCommand()

void MachObjectWriter::writeLinkeditLoadCommand	(	uint32_t	Type,
		uint32_t	DataOffset,
		uint32_t	DataSize
	)

Definition at line 406 of file MachObjectWriter.cpp.

Referenced by writeObject().

◆ writeLinkerOptionsLoadCommand()

void MachObjectWriter::writeLinkerOptionsLoadCommand ( const std::vector< std::string > & Options )

Definition at line 429 of file MachObjectWriter.cpp.

References ComputeLinkerOptionsLoadCommandSize(), is64Bit(), and Size.

Referenced by writeObject().

◆ writeNlist()

void MachObjectWriter::writeNlist	(	MachSymbolData &	MSD,
		const MCAsmLayout &	Layout
	)

◆ writeObject()

uint64_t MachObjectWriter::writeObject	(	MCAssembler &	Asm,
		const MCAsmLayout &	Layout
	)

overridevirtual

Write the object file and returns the number of bytes written.

This routine is called by the assembler after layout and relaxation is complete, fixups have been evaluated and applied, and relocations generated.

Implements llvm::MCObjectWriter.

Definition at line 738 of file MachObjectWriter.cpp.

References llvm::Address, llvm::alignTo(), assert(), ComputeLinkerOptionsLoadCommandSize(), computeSymbolTable(), llvm::Data, llvm::MCAsmLayout::getAssembler(), llvm::MCAssembler::getDataRegions(), llvm::MCLOHContainer::getEmitSize(), getLCFromMCVM(), llvm::MCAssembler::getLinkerOptions(), llvm::MCAssembler::getLOHContainer(), getPaddingSize(), getSectionAddress(), llvm::MCAsmLayout::getSectionAddressSize(), llvm::MCAsmLayout::getSectionFileSize(), llvm::StringTableBuilder::getSize(), llvm::MCAssembler::getVersionInfo(), is64Bit(), llvm::make_range(), llvm::max(), llvm::MachO::MH_OBJECT, llvm::OffsetToAlignment(), llvm::support::endian::Writer::OS, llvm::MachO::S_ATTR_SOME_INSTRUCTIONS, llvm::ARMBuildAttrs::Section, Size, llvm::MCAssembler::size(), llvm::raw_ostream::tell(), llvm::MachO::VM_PROT_EXECUTE, llvm::MachO::VM_PROT_READ, llvm::MachO::VM_PROT_WRITE, W, llvm::support::endian::Writer::write(), llvm::raw_ostream::write_zeros(), writeDysymtabLoadCommand(), writeHeader(), writeLinkeditLoadCommand(), writeLinkerOptionsLoadCommand(), writeSection(), writeSegmentLoadCommand(), and writeSymtabLoadCommand().

◆ writeSection()

void MachObjectWriter::writeSection	(	const MCAsmLayout &	Layout,
		const MCSection &	Sec,
		uint64_t	VMAddr,
		uint64_t	FileOffset,
		unsigned	Flags,
		uint64_t	RelocationsStart,
		unsigned	NumRelocations
	)

Definition at line 213 of file MachObjectWriter.cpp.

References assert(), llvm::MCAsmLayout::getSectionAddressSize(), llvm::MCAsmLayout::getSectionFileSize(), llvm::MCSectionMachO::isVirtualSection(), llvm::ARMBuildAttrs::Section, and llvm::COFF::SectionSize.

Referenced by writeObject().

◆ writeSegmentLoadCommand()

void MachObjectWriter::writeSegmentLoadCommand	(	StringRef	Name,
		unsigned	NumSections,
		uint64_t	VMAddr,
		uint64_t	VMSize,
		uint64_t	SectionDataStartOffset,
		uint64_t	SectionDataSize,
		uint32_t	MaxProt,
		uint32_t	InitProt
	)

Write a segment load command.

writeSegmentLoadCommand - Write a segment load command.

Parameters

NumSections	The number of sections in this segment.
SectionDataSize	The total size of the sections.

Definition at line 173 of file MachObjectWriter.cpp.

Referenced by writeObject().

◆ writeSymtabLoadCommand()

void MachObjectWriter::writeSymtabLoadCommand	(	uint32_t	SymbolOffset,
		uint32_t	NumSymbols,
		uint32_t	StringTableOffset,
		uint32_t	StringTableSize
	)

Definition at line 258 of file MachObjectWriter.cpp.

Referenced by writeObject().

Member Data Documentation

◆ W

support::endian::Writer llvm::MachObjectWriter::W

Definition at line 132 of file MCMachObjectWriter.h.

Referenced by computeSymbolTable(), llvm::MCLOHDirective::emit(), writeNlist(), and writeObject().

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

include/llvm/MC/MCMachObjectWriter.h
lib/MC/MachObjectWriter.cpp

Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MachObjectWriter()

Member Function Documentation

◆ addRelocation()

◆ bindIndirectSymbols()

◆ computeSectionAddresses()

◆ computeSymbolTable()

◆ doesSymbolRequireExternRelocation()

◆ executePostLayoutBinding()

◆ findAliasedSymbol()

◆ getFragmentAddress()

◆ getPaddingSize()

◆ getSectionAddress()

◆ getSectionAddressMap()

◆ getSymbolAddress()

◆ is64Bit()

◆ isFixupKindPCRel()

◆ isSymbolRefDifferenceFullyResolvedImpl() [1/2]

◆ isSymbolRefDifferenceFullyResolvedImpl() [2/2]

◆ isX86_64()

◆ recordRelocation()

◆ recordScatteredRelocation()

◆ recordTLVPRelocation()

◆ reset()

◆ writeDysymtabLoadCommand()

◆ writeHeader()

◆ writeLinkeditLoadCommand()

◆ writeLinkerOptionsLoadCommand()

◆ writeNlist()

◆ writeObject()

◆ writeSection()

◆ writeSegmentLoadCommand()

◆ writeSymtabLoadCommand()

Member Data Documentation

◆ W