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//===- MCELFStreamer.h - MCStreamer ELF Object File Interface ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCELFSTREAMER_H
#define LLVM_MC_MCELFSTREAMER_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCObjectStreamer.h"
namespace llvm {
class MCAsmBackend;
class MCCodeEmitter;
class MCExpr;
class MCInst;
class MCELFStreamer : public MCObjectStreamer {
public:
MCELFStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB,
std::unique_ptr<MCObjectWriter> OW,
std::unique_ptr<MCCodeEmitter> Emitter);
~MCELFStreamer() override = default;
/// state management
void reset() override {
SeenIdent = false;
BundleGroups.clear();
MCObjectStreamer::reset();
}
/// \name MCStreamer Interface
/// @{
void InitSections(bool NoExecStack) override;
void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
void EmitLabel(MCSymbol *Symbol, SMLoc Loc, MCFragment *F) override;
void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
void EmitThumbFunc(MCSymbol *Func) override;
void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) override;
void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
void emitELFSymverDirective(StringRef AliasName,
const MCSymbol *Aliasee) override;
void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) override;
void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
uint64_t Size = 0, unsigned ByteAlignment = 0,
SMLoc L = SMLoc()) override;
void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment = 0) override;
void EmitValueImpl(const MCExpr *Value, unsigned Size,
SMLoc Loc = SMLoc()) override;
void EmitIdent(StringRef IdentString) override;
void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
void emitCGProfileEntry(const MCSymbolRefExpr *From,
const MCSymbolRefExpr *To, uint64_t Count) override;
void FinishImpl() override;
void EmitBundleAlignMode(unsigned AlignPow2) override;
void EmitBundleLock(bool AlignToEnd) override;
void EmitBundleUnlock() override;
private:
bool isBundleLocked() const;
void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
void fixSymbolsInTLSFixups(const MCExpr *expr);
void finalizeCGProfileEntry(const MCSymbolRefExpr *&S);
void finalizeCGProfile();
/// Merge the content of the fragment \p EF into the fragment \p DF.
void mergeFragment(MCDataFragment *, MCDataFragment *);
bool SeenIdent = false;
/// BundleGroups - The stack of fragments holding the bundle-locked
/// instructions.
SmallVector<MCDataFragment *, 4> BundleGroups;
};
MCELFStreamer *createARMELFStreamer(MCContext &Context,
std::unique_ptr<MCAsmBackend> TAB,
std::unique_ptr<MCObjectWriter> OW,
std::unique_ptr<MCCodeEmitter> Emitter,
bool RelaxAll, bool IsThumb);
} // end namespace llvm
#endif // LLVM_MC_MCELFSTREAMER_H
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