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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/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 {
class MCAsmBackend;
class MCAssembler;
class MCCodeEmitter;
class MCExpr;
class MCInst;
class MCSymbol;
class MCSymbolData;
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;
LocalCommons.clear();
BindingExplicitlySet.clear();
BundleGroups.clear();
MCObjectStreamer::reset();
}
/// @name MCStreamer Interface
/// @{
void InitSections(bool NoExecStack) override;
void ChangeSection(const 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(MCSymbol *Symbol, const MCExpr *Value) override;
void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) override;
void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = nullptr,
uint64_t Size = 0, unsigned ByteAlignment = 0) override;
void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
uint64_t Size, unsigned ByteAlignment = 0) override;
void EmitValueImpl(const MCExpr *Value, unsigned Size,
const SMLoc &Loc = SMLoc()) override;
void EmitFileDirective(StringRef Filename) override;
void EmitIdent(StringRef IdentString) override;
void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
void Flush() override;
void FinishImpl() override;
void EmitBundleAlignMode(unsigned AlignPow2) override;
void EmitBundleLock(bool AlignToEnd) override;
void EmitBundleUnlock() override;
private:
void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
void fixSymbolsInTLSFixups(const MCExpr *expr);
/// \brief Merge the content of the fragment \p EF into the fragment \p DF.
void mergeFragment(MCDataFragment *, MCEncodedFragmentWithFixups *);
bool SeenIdent;
struct LocalCommon {
MCSymbolData *SD;
uint64_t Size;
unsigned ByteAlignment;
};
std::vector<LocalCommon> LocalCommons;
SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet;
/// BundleGroups - The stack of fragments holding the bundle-locked
/// instructions.
llvm::SmallVector<MCDataFragment *, 4> BundleGroups;
};
MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
raw_pwrite_stream &OS,
MCCodeEmitter *Emitter, bool RelaxAll,
bool IsThumb);
} // end namespace llvm
#endif
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