#include <MCAsmLayout.h>

Public Types
typedef llvm::SmallVectorImpl < MCSectionData * > ::const_iterator	const_iterator
typedef llvm::SmallVectorImpl < MCSectionData * >::iterator	iterator
Public Member Functions
	MCAsmLayout (MCAssembler &_Assembler)
MCAssembler &	getAssembler () const
	Get the assembler object this is a layout for.
void	invalidateFragmentsFrom (MCFragment *F)
	Invalidate the fragments starting with F because it has been resized. The fragment's size should have already been updated, but its bundle padding will be recomputed.
void	layoutFragment (MCFragment *Fragment)
	Perform layout for a single fragment, assuming that the previous fragment has already been laid out correctly, and the parent section has been initialized.
uint64_t	getFragmentOffset (const MCFragment *F) const
	Get the offset of the given fragment inside its containing section.
uint64_t	getSectionAddressSize (const MCSectionData *SD) const
	Get the address space size of the given section, as it effects layout. This may differ from the size reported by.
uint64_t	getSectionFileSize (const MCSectionData *SD) const
	Get the data size of the given section, as emitted to the object file. This may include additional padding, or be 0 for virtual sections.
bool	getSymbolOffset (const MCSymbolData *SD, uint64_t &Val) const
	Get the offset of the given symbol, as computed in the current layout.
uint64_t	getSymbolOffset (const MCSymbolData *SD) const
	Variant that reports a fatal error if the offset is not computable.
const MCSymbol *	getBaseSymbol (const MCSymbol &Symbol) const
	If this symbol is equivalent to A + Constant, return A.
Section Access (in layout order)
llvm::SmallVectorImpl < MCSectionData * > &	getSectionOrder ()
const llvm::SmallVectorImpl < MCSectionData * > &	getSectionOrder () const

Detailed Description

Encapsulates the layout of an assembly file at a particular point in time.

Assembly may require computing multiple layouts for a particular assembly file as part of the relaxation process. This class encapsulates the layout at a single point in time in such a way that it is always possible to efficiently compute the exact address of any symbol in the assembly file, even during the relaxation process.

Definition at line 30 of file MCAsmLayout.h.

Member Typedef Documentation

typedef llvm::SmallVectorImpl<MCSectionData*>::const_iterator llvm::MCAsmLayout::const_iterator

Definition at line 32 of file MCAsmLayout.h.

typedef llvm::SmallVectorImpl<MCSectionData*>::iterator llvm::MCAsmLayout::iterator

Definition at line 33 of file MCAsmLayout.h.

Constructor & Destructor Documentation

MCAsmLayout::MCAsmLayout ( MCAssembler & _Assembler )

Definition at line 66 of file MCAssembler.cpp.

References llvm::MCAssembler::begin(), llvm::MCAssembler::end(), and llvm::SmallVectorTemplateBase< T, isPodLike >::push_back().

Member Function Documentation

MCAssembler& llvm::MCAsmLayout::getAssembler ( ) const [inline]

Get the assembler object this is a layout for.

Definition at line 62 of file MCAsmLayout.h.

Referenced by llvm::MCExpr::EvaluateAsRelocatable(), llvm::PPCMCExpr::EvaluateAsRelocatableImpl(), llvm::MCExpr::EvaluateAsValue(), getSectionAddressSize(), llvm::MachObjectWriter::getSymbolAddress(), getSymbolOffsetImpl(), layoutFragment(), llvm::MachObjectWriter::WriteNlist(), and llvm::MachObjectWriter::WriteObject().

const MCSymbol * MCAsmLayout::getBaseSymbol ( const MCSymbol & Symbol ) const

If this symbol is equivalent to A + Constant, return A.

Definition at line 184 of file MCAssembler.cpp.

References llvm::ARM_PROC::A, llvm::MCExpr::EvaluateAsValue(), llvm::MCContext::FatalError(), llvm::MCAssembler::getContext(), llvm::MCSymbol::getName(), llvm::MCValue::getSymA(), llvm::MCValue::getSymB(), llvm::MCSymbolRefExpr::getSymbol(), llvm::MCSymbol::getVariableValue(), llvm::MCSymbol::isVariable(), and llvm_unreachable.

uint64_t MCAsmLayout::getFragmentOffset ( const MCFragment * F ) const

Get the offset of the given fragment inside its containing section.

Definition at line 115 of file MCAssembler.cpp.

Referenced by llvm::MCAssembler::computeFragmentSize(), getFixupOffset(), llvm::MachObjectWriter::getFragmentAddress(), getLabelOffset(), getSectionAddressSize(), and UpdateSymbols().

uint64_t MCAsmLayout::getSectionAddressSize ( const MCSectionData * SD ) const

Get the address space size of the given section, as it effects layout. This may differ from the size reported by.

See also:: getSectionSize() by not including section tail padding.

Definition at line 206 of file MCAssembler.cpp.

References llvm::iplist< NodeTy, Traits >::back(), llvm::MCAssembler::computeFragmentSize(), getAssembler(), llvm::MCSectionData::getFragmentList(), and getFragmentOffset().

Referenced by llvm::MachObjectWriter::computeSectionAddresses(), llvm::MachObjectWriter::getPaddingSize(), getSectionFileSize(), llvm::MachObjectWriter::WriteObject(), llvm::MachObjectWriter::WriteSection(), and llvm::MCAssembler::writeSectionData().

uint64_t MCAsmLayout::getSectionFileSize ( const MCSectionData * SD ) const

Get the data size of the given section, as emitted to the object file. This may include additional padding, or be 0 for virtual sections.

Definition at line 212 of file MCAssembler.cpp.

References llvm::MCSectionData::getSection(), getSectionAddressSize(), and llvm::MCSection::isVirtualSection().

Referenced by llvm::MachObjectWriter::WriteObject(), llvm::MachObjectWriter::WriteSection(), and llvm::MCAssembler::writeSectionData().

llvm::SmallVectorImpl<MCSectionData*>& llvm::MCAsmLayout::getSectionOrder ( ) [inline]

Definition at line 77 of file MCAsmLayout.h.

Referenced by llvm::MachObjectWriter::computeSectionAddresses(), and llvm::MachObjectWriter::getPaddingSize().

const llvm::SmallVectorImpl<MCSectionData*>& llvm::MCAsmLayout::getSectionOrder ( ) const [inline]

Definition at line 80 of file MCAsmLayout.h.

bool MCAsmLayout::getSymbolOffset	(	const MCSymbolData *	SD,
		uint64_t &	Val
	)		const

Get the offset of the given symbol, as computed in the current layout.

Returns:: True on success.

Definition at line 174 of file MCAssembler.cpp.

References getSymbolOffsetImpl().

Referenced by llvm::MachObjectWriter::getSymbolAddress(), and getSymbolValue().

uint64_t MCAsmLayout::getSymbolOffset ( const MCSymbolData * SD ) const

Variant that reports a fatal error if the offset is not computable.

Definition at line 178 of file MCAssembler.cpp.

References getSymbolOffsetImpl().

void MCAsmLayout::invalidateFragmentsFrom ( MCFragment * F )

Invalidate the fragments starting with F because it has been resized. The fragment's size should have already been updated, but its bundle padding will be recomputed.

Definition at line 87 of file MCAssembler.cpp.

References llvm::MCFragment::getParent(), and llvm::ilist_node< NodeTy >::getPrevNode().

Referenced by CompressDebugSection().

void MCAsmLayout::layoutFragment ( MCFragment * Fragment )

Perform layout for a single fragment, assuming that the previous fragment has already been laid out correctly, and the parent section has been initialized.

Definition at line 580 of file MCAssembler.cpp.

References llvm::MCAssembler::computeFragmentSize(), F(), getAssembler(), llvm::MCAssembler::getBundleAlignSize(), llvm::MCFragment::getParent(), llvm::ilist_node< NodeTy >::getPrevNode(), llvm::MCFragment::hasInstructions(), llvm::MCAssembler::isBundlingEnabled(), llvm::report_fatal_error(), and llvm::MCFragment::setBundlePadding().

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

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation