#include "llvm/MC/MCELFObjectWriter.h"

Inheritance diagram for llvm::ELFObjectWriter:

Classes
struct	Symver

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

	ELFObjectWriter (std::unique_ptr< MCELFObjectTargetWriter > MOTW, raw_pwrite_stream &OS, raw_pwrite_stream &DwoOS, bool IsLittleEndian)

void	reset () override
	lifetime management

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

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

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

uint64_t	writeObject (MCAssembler &Asm) override
	Write the object file and returns the number of bytes written.

bool	hasRelocationAddend () const

bool	usesRela (const MCTargetOptions *TO, const MCSectionELF &Sec) const

bool	shouldRelocateWithSymbol (const MCAssembler &Asm, const MCValue &Val, const MCSymbolELF *Sym, uint64_t C, unsigned Type) const

bool	checkRelocation (MCContext &Ctx, SMLoc Loc, const MCSectionELF From, const MCSectionELF To)

unsigned	getELFHeaderEFlags () const

void	setELFHeaderEFlags (unsigned Flags)

void	markGnuAbi ()

bool	seenGnuAbi () const

void	setOverrideABIVersion (uint8_t V)

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

MCObjectWriter &	operator= (const MCObjectWriter &)=delete

virtual	~MCObjectWriter ()

virtual void	reset ()
	lifetime management

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.

MutableArrayRef< std::pair< std::string, size_t > >	getFileNames ()

void	addFileName (MCAssembler &Asm, StringRef FileName)

void	setCompilerVersion (StringRef CompilerVers)

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

bool	getEmitAddrsigSection ()

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

std::vector< const MCSymbol * > &	getAddrsigSyms ()

SmallVector< CGProfileEntry, 0 > &	getCGProfile ()

bool	getSubsectionsViaSymbols () const

void	setSubsectionsViaSymbols (bool Value)

Public Attributes
std::unique_ptr< MCELFObjectTargetWriter >	TargetObjectWriter

raw_pwrite_stream &	OS

raw_pwrite_stream *	DwoOS = nullptr

DenseMap< const MCSectionELF *, std::vector< ELFRelocationEntry > >	Relocations

DenseMap< const MCSymbolELF , const MCSymbolELF >	Renames

bool	IsLittleEndian = false

bool	SeenGnuAbi = false

std::optional< uint8_t >	OverrideABIVersion

SmallVector< Symver, 0 >	Symvers

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

Protected Attributes inherited from llvm::MCObjectWriter
SmallVector< std::pair< std::string, size_t >, 0 >	FileNames
	List of declared file names.

std::string	CompilerVersion

std::vector< const MCSymbol * >	AddrsigSyms

bool	EmitAddrsigSection = false

bool	SubsectionsViaSymbols = false

SmallVector< CGProfileEntry, 0 >	CGProfile

Detailed Description

Definition at line 157 of file MCELFObjectWriter.h.

Constructor & Destructor Documentation

◆ ELFObjectWriter() [1/2]

ELFObjectWriter::ELFObjectWriter	(	std::unique_ptr< MCELFObjectTargetWriter >	MOTW,
		raw_pwrite_stream &	OS,
		bool	IsLittleEndian
	)

Definition at line 1107 of file ELFObjectWriter.cpp.

◆ ELFObjectWriter() [2/2]

ELFObjectWriter::ELFObjectWriter	(	std::unique_ptr< MCELFObjectTargetWriter >	MOTW,
		raw_pwrite_stream &	OS,
		raw_pwrite_stream &	DwoOS,
		bool	IsLittleEndian
	)

Definition at line 1111 of file ELFObjectWriter.cpp.

Member Function Documentation

◆ checkRelocation()

bool ELFObjectWriter::checkRelocation	(	MCContext &	Ctx,
		SMLoc	Loc,
		const MCSectionELF *	From,
		const MCSectionELF *	To
	)

Definition at line 1318 of file ELFObjectWriter.cpp.

References DwoOS, From, isDwoSection(), and llvm::MCContext::reportError().

Referenced by recordRelocation().

◆ executePostLayoutBinding()

void ELFObjectWriter::executePostLayoutBinding ( MCAssembler & Asm )

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.

Reimplemented from llvm::MCObjectWriter.

Definition at line 1131 of file ELFObjectWriter.cpp.

References llvm::MCObjectWriter::AddrsigSyms, assert(), llvm::MCSymbolRefExpr::create(), llvm::StringRef::find(), llvm::StringRef::npos, Renames, llvm::StringRef::starts_with(), llvm::StringRef::substr(), Sym, Symvers, and llvm::CallingConv::Tail.

◆ getELFHeaderEFlags()

unsigned llvm::ELFObjectWriter::getELFHeaderEFlags ( ) const

inline

Definition at line 207 of file MCELFObjectWriter.h.

◆ hasRelocationAddend()

bool ELFObjectWriter::hasRelocationAddend ( ) const

Definition at line 1127 of file ELFObjectWriter.cpp.

References TargetObjectWriter.

Referenced by shouldRelocateWithSymbol(), and usesRela().

◆ isSymbolRefDifferenceFullyResolvedImpl()

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

overridevirtual

Reimplemented from llvm::MCObjectWriter.

Definition at line 1437 of file ELFObjectWriter.cpp.

References assert(), llvm::MCFragment::getParent(), llvm::ELF::STB_LOCAL, and llvm::ELF::STT_GNU_IFUNC.

◆ markGnuAbi()

void llvm::ELFObjectWriter::markGnuAbi ( )

inline

Definition at line 211 of file MCELFObjectWriter.h.

References SeenGnuAbi.

Referenced by llvm::MCELFStreamer::changeSection(), and llvm::MCELFStreamer::emitSymbolAttribute().

◆ recordRelocation()

void ELFObjectWriter::recordRelocation	(	MCAssembler &	Asm,
		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 1334 of file ELFObjectWriter.cpp.

References assert(), llvm::CallingConv::C, checkRelocation(), Fixup, llvm::MCFixupKindInfo::FKF_IsPCRel, llvm::MCFixupKindInfo::Flags, llvm::MCSection::getBeginSymbol(), llvm::MCAsmBackend::getFixupKindInfo(), llvm::MCFragment::getParent(), llvm::MCSymbolRefExpr::getSymbol(), llvm::MCContext::getTargetOptions(), Relocations, Renames, llvm::MCContext::reportError(), llvm::MCSymbolELF::setIsWeakrefUsedInReloc(), llvm::MCSymbol::setUsedInReloc(), shouldRelocateWithSymbol(), llvm::ELF::SHT_LLVM_CALL_GRAPH_PROFILE, TargetObjectWriter, usesRela(), and llvm::MCSymbolRefExpr::VK_WEAKREF.