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77afbdce53
excluding visibility bits. Generic STO handling at the Target level. The st_other field of the ELF symbol table is one byte in size. The first 2 bytes are used for generic visibility and are currently handled by llvm. The other six bits are processor specific and need to be set at the target level. A couple of notes: The new static methods for accessing and setting the "other" flags in include/llvm/MC/MCELF.h match the style guide and not the other methods in the file. I don't like the inconsistency, but feel I should follow the prescribed lowerUpper() convention. STO_ value definitions are not specified in gnu land as consistently as the STT_ and STB_ fields. Probably because the latter were defined in a standards doc and the former defined partially in code. I have stuck with the full byte definition of the flags. Contributer: Zoran Jovanovic git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175561 91177308-0d34-0410-b5e6-96231b3b80d8
126 lines
4.0 KiB
C++
126 lines
4.0 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/SmallPtrSet.h"
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#include "llvm/MC/MCDirectives.h"
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#include "llvm/MC/MCObjectStreamer.h"
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#include "llvm/MC/SectionKind.h"
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#include "llvm/Support/DataTypes.h"
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#include <vector>
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namespace llvm {
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class MCAsmBackend;
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class MCAssembler;
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class MCCodeEmitter;
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class MCExpr;
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class MCInst;
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class MCSymbol;
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class MCSymbolData;
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class raw_ostream;
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class MCELFStreamer : public MCObjectStreamer {
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protected:
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MCELFStreamer(StreamerKind Kind, MCContext &Context, MCAsmBackend &TAB,
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raw_ostream &OS, MCCodeEmitter *Emitter)
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: MCObjectStreamer(Kind, Context, TAB, OS, Emitter) {}
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public:
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MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
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MCCodeEmitter *Emitter)
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: MCObjectStreamer(SK_ELFStreamer, Context, TAB, OS, Emitter) {}
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MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
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MCCodeEmitter *Emitter, MCAssembler *Assembler)
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: MCObjectStreamer(SK_ELFStreamer, Context, TAB, OS, Emitter,
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Assembler) {}
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virtual ~MCELFStreamer();
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/// @name MCStreamer Interface
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/// @{
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virtual void InitSections();
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virtual void InitToTextSection();
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virtual void ChangeSection(const MCSection *Section);
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virtual void EmitLabel(MCSymbol *Symbol);
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virtual void EmitDebugLabel(MCSymbol *Symbol);
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virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
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virtual void EmitThumbFunc(MCSymbol *Func);
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virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
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virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
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virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
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virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment);
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virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol);
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virtual void EmitCOFFSymbolStorageClass(int StorageClass);
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virtual void EmitCOFFSymbolType(int Type);
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virtual void EndCOFFSymbolDef();
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virtual MCSymbolData &getOrCreateSymbolData(MCSymbol *Symbol);
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virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
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virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment);
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virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
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uint64_t Size = 0, unsigned ByteAlignment = 0);
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virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment = 0);
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virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
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unsigned AddrSpace);
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virtual void EmitFileDirective(StringRef Filename);
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virtual void EmitTCEntry(const MCSymbol &S);
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virtual void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned);
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virtual void FinishImpl();
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/// @}
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static bool classof(const MCStreamer *S) {
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return S->getKind() == SK_ELFStreamer || S->getKind() == SK_ARMELFStreamer;
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}
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private:
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virtual void EmitInstToFragment(const MCInst &Inst);
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virtual void EmitInstToData(const MCInst &Inst);
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virtual void EmitBundleAlignMode(unsigned AlignPow2);
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virtual void EmitBundleLock(bool AlignToEnd);
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virtual void EmitBundleUnlock();
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void fixSymbolsInTLSFixups(const MCExpr *expr);
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struct LocalCommon {
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MCSymbolData *SD;
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uint64_t Size;
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unsigned ByteAlignment;
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};
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std::vector<LocalCommon> LocalCommons;
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SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet;
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void SetSection(StringRef Section, unsigned Type, unsigned Flags,
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SectionKind Kind);
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void SetSectionData();
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void SetSectionText();
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void SetSectionBss();
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};
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} // end namespace llvm
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#endif
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