//===- 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/SmallPtrSet.h"

#include "llvm/MC/MCDirectives.h"

#include "llvm/MC/MCObjectStreamer.h"

#include "llvm/MC/SectionKind.h"

#include "llvm/Support/DataTypes.h"

#include <vector>

namespace llvm_ks {

class MCAsmBackend;

class MCAssembler;

class MCCodeEmitter;

class MCExpr;

class MCInst;

class raw_ostream;

class MCELFStreamer : public MCObjectStreamer {

public:

  MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_pwrite_stream &OS,

                MCCodeEmitter *Emitter)

      : MCObjectStreamer(Context, TAB, OS, Emitter), SeenIdent(false) {}

  ~MCELFStreamer() override;

  /// 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) 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 BeginCOFFSymbolDef(const MCSymbol *Symbol) override;

  void EmitCOFFSymbolStorageClass(int StorageClass) override;

  void EmitCOFFSymbolType(int Type) override;

  void EndCOFFSymbolDef() override;

  void emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) 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) 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 EmitFileDirective(StringRef Filename) override;

  void EmitIdent(StringRef IdentString) override;

  void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;

  unsigned int FinishImpl() override;

  void EmitBundleAlignMode(unsigned AlignPow2) override;

  void EmitBundleLock(bool AlignToEnd) override;

  void EmitBundleUnlock() override;

private:

  bool isBundleLocked() const;

  void EmitInstToFragment(MCInst &Inst, const MCSubtargetInfo &) override;

  void EmitInstToData(MCInst &Inst, const MCSubtargetInfo &, unsigned int &KsError) override;

  void fixSymbolsInTLSFixups(const MCExpr *expr);

  /// \brief Merge the content of the fragment \p EF into the fragment \p DF.

  void mergeFragment(MCDataFragment *, MCDataFragment *);

  bool SeenIdent;

  /// BundleGroups - The stack of fragments holding the bundle-locked

  /// instructions.

  llvm_ks::SmallVector<MCDataFragment *, 4> BundleGroups;

};

MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,

                                    raw_pwrite_stream &OS,

                                    MCCodeEmitter *Emitter, bool RelaxAll,

                                    bool IsThumb);

} // end namespace llvm_ks

#endif