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29c96f133e
diagnostic that includes location information.
Currently if one has this assembly:
.quad (0x1234 + (4 * SOME_VALUE))
where SOME_VALUE is undefined ones gets the less than
useful error message with no location information:
% clang -c x.s
clang -cc1as: fatal error: error in backend: expected relocatable expression
With this fix one now gets a more useful error message
with location information:
% clang -c x.s
x.s:5:8: error: expected relocatable expression
.quad (0x1234 + (4 * SOME_VALUE))
^
To do this I plumbed the SMLoc through the MCObjectStreamer
EmitValue() and EmitValueImpl() interfaces so it could be used
when creating the MCFixup.
rdar://12391022
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206906 91177308-0d34-0410-b5e6-96231b3b80d8
119 lines
3.9 KiB
C++
119 lines
3.9 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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public:
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MCELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
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MCCodeEmitter *Emitter)
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: MCObjectStreamer(Context, TAB, OS, Emitter),
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SeenIdent(false) {}
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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(Context, TAB, OS, Emitter, Assembler),
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SeenIdent(false) {}
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virtual ~MCELFStreamer();
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/// @name MCStreamer Interface
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/// @{
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void InitSections() override;
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void ChangeSection(const MCSection *Section,
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const MCExpr *Subsection) override;
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void EmitLabel(MCSymbol *Symbol) override;
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void EmitDebugLabel(MCSymbol *Symbol) 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 BeginCOFFSymbolDef(const MCSymbol *Symbol) override;
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void EmitCOFFSymbolStorageClass(int StorageClass) override;
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void EmitCOFFSymbolType(int Type) override;
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void EndCOFFSymbolDef() override;
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MCSymbolData &getOrCreateSymbolData(const MCSymbol *Symbol) 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(const MCSection *Section, MCSymbol *Symbol = nullptr,
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uint64_t Size = 0, unsigned ByteAlignment = 0) override;
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void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment = 0) override;
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void EmitValueImpl(const MCExpr *Value, unsigned Size,
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const SMLoc &Loc = SMLoc()) override;
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void EmitFileDirective(StringRef Filename) 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 Flush() 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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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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bool SeenIdent;
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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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};
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MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
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raw_ostream &OS, MCCodeEmitter *Emitter,
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bool RelaxAll, bool NoExecStack,
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bool IsThumb);
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} // end namespace llvm
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#endif
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