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83194dc5b2
Dont emit Mapping symbols for sections that contain only data. Summary: Dont emit mapping symbols for sections that contain only data. Reviewers: rengolin, weimingz, kparzysz, t.p.northover, peter.smith Reviewed By: t.p.northover Patched by Shankar Easwaran <shankare@codeaurora.org> Subscribers: alekseyshl, t.p.northover, llvm-commits Differential Revision: https://reviews.llvm.org/D30724 llvm-svn: 299392
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
//===- MCELFStreamer.h - MCStreamer ELF Object File Interface ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCELFSTREAMER_H
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#define LLVM_MC_MCELFSTREAMER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/MC/MCDirectives.h"
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#include "llvm/MC/MCObjectStreamer.h"
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namespace llvm {
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class MCAsmBackend;
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class MCCodeEmitter;
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class MCExpr;
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class MCInst;
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class MCELFStreamer : public MCObjectStreamer {
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public:
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MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_pwrite_stream &OS,
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MCCodeEmitter *Emitter)
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: MCObjectStreamer(Context, TAB, OS, Emitter) {}
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~MCELFStreamer() override = default;
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/// state management
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void reset() override {
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SeenIdent = false;
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BundleGroups.clear();
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MCObjectStreamer::reset();
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}
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/// \name MCStreamer Interface
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/// @{
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void InitSections(bool NoExecStack) override;
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void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
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void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
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void EmitLabel(MCSymbol *Symbol, SMLoc Loc, MCFragment *F) override;
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void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
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void EmitThumbFunc(MCSymbol *Func) override;
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void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
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bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
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void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
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void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) override;
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void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
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void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) override;
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void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
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uint64_t Size = 0, unsigned ByteAlignment = 0) override;
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void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment = 0) override;
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void EmitValueImpl(const MCExpr *Value, unsigned Size,
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SMLoc Loc = SMLoc()) override;
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void EmitIdent(StringRef IdentString) override;
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void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
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void FinishImpl() override;
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void EmitBundleAlignMode(unsigned AlignPow2) override;
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void EmitBundleLock(bool AlignToEnd) override;
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void EmitBundleUnlock() override;
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private:
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bool isBundleLocked() const;
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void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
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void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
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void fixSymbolsInTLSFixups(const MCExpr *expr);
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/// \brief Merge the content of the fragment \p EF into the fragment \p DF.
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void mergeFragment(MCDataFragment *, MCDataFragment *);
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bool SeenIdent = false;
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/// BundleGroups - The stack of fragments holding the bundle-locked
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/// instructions.
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SmallVector<MCDataFragment *, 4> BundleGroups;
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};
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MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
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raw_pwrite_stream &OS,
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MCCodeEmitter *Emitter, bool RelaxAll,
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bool IsThumb);
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} // end namespace llvm
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#endif // LLVM_MC_MCELFSTREAMER_H
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