LLVM: llvm::MCFixup Class Reference

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#include <MCFixup.h>

Public Member Functions
MCFixupKind	getKind () const

uint32_t	getOffset () const

void	setOffset (uint32_t Value)

const MCExpr *	getValue () const

SMLoc	getLoc () const

Static Public Member Functions
static MCFixup	Create (uint32_t Offset, const MCExpr *Value, MCFixupKind Kind, SMLoc Loc=SMLoc())

static MCFixupKind	getKindForSize (unsigned Size, bool isPCRel)

Detailed Description

MCFixup - Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction) which requires assemble- or run- time patching.

Fixups are used any time the target instruction encoder needs to represent some value in an instruction which is not yet concrete. The encoder will encode the instruction assuming the value is 0, and emit a fixup which communicates to the assembler backend how it should rewrite the encoded value.

During the process of relaxation, the assembler will apply fixups as symbolic values become concrete. When relaxation is complete, any remaining fixups become relocations in the object file (or errors, if the fixup cannot be encoded on the target).

Definition at line 61 of file MCFixup.h.

Member Function Documentation

static MCFixup llvm::MCFixup::Create	(	uint32_t	Offset,
		const MCExpr *	Value,
		MCFixupKind	Kind,
		SMLoc	Loc = `SMLoc()`
	)

inlinestatic

Definition at line 77 of file MCFixup.h.

References llvm::MaxTargetFixupKind.

Referenced by llvm::MCObjectStreamer::EmitGPRel32Value(), llvm::MCObjectStreamer::EmitGPRel64Value(), llvm::MCObjectStreamer::EmitValueImpl(), and getBranchTargetOpValue().

MCFixupKind llvm::MCFixup::getKind ( ) const

inline

Definition at line 88 of file MCFixup.h.

Referenced by adjustFixupValue(), getFixupOffset(), llvm::MipsGetSymAndOffset(), and llvm::operator<<().

static MCFixupKind llvm::MCFixup::getKindForSize	(	unsigned	Size,
		bool	isPCRel
	)

inlinestatic

getKindForSize - Return the generic fixup kind for a value with the given size. It is an error to pass an unsupported size.

Definition at line 97 of file MCFixup.h.

References llvm::FK_Data_1, llvm::FK_Data_2, llvm::FK_Data_4, llvm::FK_Data_8, llvm::FK_PCRel_1, llvm::FK_PCRel_2, llvm::FK_PCRel_4, llvm::FK_PCRel_8, and llvm_unreachable.

Referenced by llvm::MCObjectStreamer::EmitValueImpl(), and getImmFixupKind().

SMLoc llvm::MCFixup::getLoc ( ) const

inline

Definition at line 107 of file MCFixup.h.

Referenced by adjustFixupValue().

uint32_t llvm::MCFixup::getOffset ( ) const

inline

Definition at line 90 of file MCFixup.h.

Referenced by getFixupOffset(), and llvm::operator<<().

const MCExpr* llvm::MCFixup::getValue ( ) const

inline

Definition at line 93 of file MCFixup.h.

Referenced by llvm::MipsGetSymAndOffset(), and llvm::operator<<().

void llvm::MCFixup::setOffset ( uint32_t Value )

inline

Definition at line 91 of file MCFixup.h.

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

MCFixup.h