forked from OSchip/llvm-project
1007 lines
32 KiB
C++
1007 lines
32 KiB
C++
//===- lib/MC/MCAsmStreamer.cpp - Text Assembly Output --------------------===//
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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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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCFixupKindInfo.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Target/TargetAsmBackend.h"
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#include "llvm/Target/TargetAsmInfo.h"
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#include "llvm/Target/TargetLoweringObjectFile.h"
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#include <cctype>
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using namespace llvm;
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namespace {
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class MCAsmStreamer : public MCStreamer {
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formatted_raw_ostream &OS;
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const MCAsmInfo &MAI;
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OwningPtr<MCInstPrinter> InstPrinter;
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OwningPtr<MCCodeEmitter> Emitter;
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OwningPtr<TargetAsmBackend> AsmBackend;
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SmallString<128> CommentToEmit;
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raw_svector_ostream CommentStream;
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unsigned IsVerboseAsm : 1;
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unsigned ShowInst : 1;
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unsigned UseLoc : 1;
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bool needsSet(const MCExpr *Value);
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public:
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MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os,
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bool isVerboseAsm,
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bool useLoc,
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MCInstPrinter *printer, MCCodeEmitter *emitter,
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TargetAsmBackend *asmbackend,
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bool showInst)
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: MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()),
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InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend),
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CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
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ShowInst(showInst), UseLoc(useLoc) {
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if (InstPrinter && IsVerboseAsm)
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InstPrinter->setCommentStream(CommentStream);
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}
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~MCAsmStreamer() {}
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inline void EmitEOL() {
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// If we don't have any comments, just emit a \n.
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if (!IsVerboseAsm) {
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OS << '\n';
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return;
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}
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EmitCommentsAndEOL();
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}
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void EmitCommentsAndEOL();
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/// isVerboseAsm - Return true if this streamer supports verbose assembly at
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/// all.
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virtual bool isVerboseAsm() const { return IsVerboseAsm; }
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/// hasRawTextSupport - We support EmitRawText.
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virtual bool hasRawTextSupport() const { return true; }
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/// AddComment - Add a comment that can be emitted to the generated .s
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/// file if applicable as a QoI issue to make the output of the compiler
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/// more readable. This only affects the MCAsmStreamer, and only when
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/// verbose assembly output is enabled.
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virtual void AddComment(const Twine &T);
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/// AddEncodingComment - Add a comment showing the encoding of an instruction.
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virtual void AddEncodingComment(const MCInst &Inst);
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/// GetCommentOS - Return a raw_ostream that comments can be written to.
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/// Unlike AddComment, you are required to terminate comments with \n if you
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/// use this method.
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virtual raw_ostream &GetCommentOS() {
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if (!IsVerboseAsm)
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return nulls(); // Discard comments unless in verbose asm mode.
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return CommentStream;
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}
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/// AddBlankLine - Emit a blank line to a .s file to pretty it up.
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virtual void AddBlankLine() {
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EmitEOL();
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}
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/// @name MCStreamer Interface
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/// @{
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virtual void ChangeSection(const MCSection *Section);
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virtual void InitSections() {
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// FIXME, this is MachO specific, but the testsuite
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// expects this.
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SwitchSection(getContext().getMachOSection("__TEXT", "__text",
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MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
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0, SectionKind::getText()));
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}
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virtual void EmitLabel(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 EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
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virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
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virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
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const MCSymbol *LastLabel,
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const MCSymbol *Label);
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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 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 void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
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virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment);
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/// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
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///
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/// @param Symbol - The common symbol to emit.
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/// @param Size - The size of the common symbol.
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virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
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virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
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unsigned 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 EmitBytes(StringRef Data, unsigned AddrSpace);
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virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
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bool isPCRel, unsigned AddrSpace);
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virtual void EmitIntValue(uint64_t Value, unsigned Size,
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unsigned AddrSpace = 0);
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virtual void EmitULEB128Value(const MCExpr *Value);
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virtual void EmitSLEB128Value(const MCExpr *Value);
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virtual void EmitGPRel32Value(const MCExpr *Value);
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virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue,
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unsigned AddrSpace);
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virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
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unsigned ValueSize = 1,
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unsigned MaxBytesToEmit = 0);
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virtual void EmitCodeAlignment(unsigned ByteAlignment,
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unsigned MaxBytesToEmit = 0);
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virtual void EmitValueToOffset(const MCExpr *Offset,
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unsigned char Value = 0);
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virtual void EmitFileDirective(StringRef Filename);
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virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Filename);
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virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
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unsigned Column, unsigned Flags,
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unsigned Isa, unsigned Discriminator,
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StringRef FileName);
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virtual void EmitCFIStartProc();
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virtual void EmitCFIEndProc();
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virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);
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virtual void EmitCFIDefCfaOffset(int64_t Offset);
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virtual void EmitCFIDefCfaRegister(int64_t Register);
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virtual void EmitCFIOffset(int64_t Register, int64_t Offset);
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virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding);
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virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding);
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virtual void EmitCFIRememberState();
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virtual void EmitCFIRestoreState();
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virtual void EmitCFISameValue(int64_t Register);
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virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
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virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
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virtual void EmitFnStart();
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virtual void EmitFnEnd();
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virtual void EmitCantUnwind();
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virtual void EmitPersonality(const MCSymbol *Personality);
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virtual void EmitHandlerData();
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virtual void EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0);
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virtual void EmitPad(int64_t Offset);
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virtual void EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool);
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virtual void EmitInstruction(const MCInst &Inst);
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/// EmitRawText - If this file is backed by an assembly streamer, this dumps
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/// the specified string in the output .s file. This capability is
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/// indicated by the hasRawTextSupport() predicate.
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virtual void EmitRawText(StringRef String);
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virtual void Finish();
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/// @}
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};
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} // end anonymous namespace.
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/// AddComment - Add a comment that can be emitted to the generated .s
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/// file if applicable as a QoI issue to make the output of the compiler
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/// more readable. This only affects the MCAsmStreamer, and only when
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/// verbose assembly output is enabled.
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void MCAsmStreamer::AddComment(const Twine &T) {
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if (!IsVerboseAsm) return;
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// Make sure that CommentStream is flushed.
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CommentStream.flush();
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T.toVector(CommentToEmit);
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// Each comment goes on its own line.
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CommentToEmit.push_back('\n');
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// Tell the comment stream that the vector changed underneath it.
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CommentStream.resync();
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}
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void MCAsmStreamer::EmitCommentsAndEOL() {
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if (CommentToEmit.empty() && CommentStream.GetNumBytesInBuffer() == 0) {
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OS << '\n';
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return;
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}
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CommentStream.flush();
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StringRef Comments = CommentToEmit.str();
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assert(Comments.back() == '\n' &&
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"Comment array not newline terminated");
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do {
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// Emit a line of comments.
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OS.PadToColumn(MAI.getCommentColumn());
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size_t Position = Comments.find('\n');
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OS << MAI.getCommentString() << ' ' << Comments.substr(0, Position) << '\n';
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Comments = Comments.substr(Position+1);
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} while (!Comments.empty());
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CommentToEmit.clear();
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// Tell the comment stream that the vector changed underneath it.
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CommentStream.resync();
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}
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static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
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assert(Bytes && "Invalid size!");
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return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
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}
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void MCAsmStreamer::ChangeSection(const MCSection *Section) {
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assert(Section && "Cannot switch to a null section!");
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Section->PrintSwitchToSection(MAI, OS);
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}
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void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
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assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
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assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
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assert(getCurrentSection() && "Cannot emit before setting section!");
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OS << *Symbol << MAI.getLabelSuffix();
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EmitEOL();
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Symbol->setSection(*getCurrentSection());
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}
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void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
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switch (Flag) {
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default: assert(0 && "Invalid flag!");
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case MCAF_SyntaxUnified: OS << "\t.syntax unified"; break;
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case MCAF_SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
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case MCAF_Code16: OS << "\t.code\t16"; break;
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case MCAF_Code32: OS << "\t.code\t32"; break;
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}
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EmitEOL();
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}
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void MCAsmStreamer::EmitThumbFunc(MCSymbol *Func) {
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// This needs to emit to a temporary string to get properly quoted
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// MCSymbols when they have spaces in them.
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OS << "\t.thumb_func";
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if (Func)
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OS << '\t' << *Func;
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EmitEOL();
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}
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void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
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OS << *Symbol << " = " << *Value;
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EmitEOL();
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// FIXME: Lift context changes into super class.
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Symbol->setVariableValue(Value);
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}
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void MCAsmStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {
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OS << ".weakref " << *Alias << ", " << *Symbol;
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EmitEOL();
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}
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void MCAsmStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
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const MCSymbol *LastLabel,
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const MCSymbol *Label) {
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EmitDwarfSetLineAddr(LineDelta, Label,
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getContext().getTargetAsmInfo().getPointerSize());
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}
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void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
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MCSymbolAttr Attribute) {
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switch (Attribute) {
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case MCSA_Invalid: assert(0 && "Invalid symbol attribute");
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case MCSA_ELF_TypeFunction: /// .type _foo, STT_FUNC # aka @function
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case MCSA_ELF_TypeIndFunction: /// .type _foo, STT_GNU_IFUNC
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case MCSA_ELF_TypeObject: /// .type _foo, STT_OBJECT # aka @object
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case MCSA_ELF_TypeTLS: /// .type _foo, STT_TLS # aka @tls_object
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case MCSA_ELF_TypeCommon: /// .type _foo, STT_COMMON # aka @common
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case MCSA_ELF_TypeNoType: /// .type _foo, STT_NOTYPE # aka @notype
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case MCSA_ELF_TypeGnuUniqueObject: /// .type _foo, @gnu_unique_object
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assert(MAI.hasDotTypeDotSizeDirective() && "Symbol Attr not supported");
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OS << "\t.type\t" << *Symbol << ','
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<< ((MAI.getCommentString()[0] != '@') ? '@' : '%');
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switch (Attribute) {
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default: assert(0 && "Unknown ELF .type");
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case MCSA_ELF_TypeFunction: OS << "function"; break;
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case MCSA_ELF_TypeIndFunction: OS << "gnu_indirect_function"; break;
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case MCSA_ELF_TypeObject: OS << "object"; break;
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case MCSA_ELF_TypeTLS: OS << "tls_object"; break;
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case MCSA_ELF_TypeCommon: OS << "common"; break;
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case MCSA_ELF_TypeNoType: OS << "no_type"; break;
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case MCSA_ELF_TypeGnuUniqueObject: OS << "gnu_unique_object"; break;
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}
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EmitEOL();
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return;
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case MCSA_Global: // .globl/.global
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OS << MAI.getGlobalDirective();
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break;
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case MCSA_Hidden: OS << "\t.hidden\t"; break;
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case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break;
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case MCSA_Internal: OS << "\t.internal\t"; break;
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case MCSA_LazyReference: OS << "\t.lazy_reference\t"; break;
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case MCSA_Local: OS << "\t.local\t"; break;
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case MCSA_NoDeadStrip: OS << "\t.no_dead_strip\t"; break;
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case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break;
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case MCSA_PrivateExtern: OS << "\t.private_extern\t"; break;
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case MCSA_Protected: OS << "\t.protected\t"; break;
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case MCSA_Reference: OS << "\t.reference\t"; break;
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case MCSA_Weak: OS << "\t.weak\t"; break;
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case MCSA_WeakDefinition: OS << "\t.weak_definition\t"; break;
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// .weak_reference
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case MCSA_WeakReference: OS << MAI.getWeakRefDirective(); break;
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case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break;
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}
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OS << *Symbol;
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EmitEOL();
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}
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void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
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OS << ".desc" << ' ' << *Symbol << ',' << DescValue;
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EmitEOL();
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}
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void MCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
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OS << "\t.def\t " << *Symbol << ';';
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EmitEOL();
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}
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void MCAsmStreamer::EmitCOFFSymbolStorageClass (int StorageClass) {
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OS << "\t.scl\t" << StorageClass << ';';
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EmitEOL();
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}
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void MCAsmStreamer::EmitCOFFSymbolType (int Type) {
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OS << "\t.type\t" << Type << ';';
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EmitEOL();
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}
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void MCAsmStreamer::EndCOFFSymbolDef() {
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OS << "\t.endef";
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EmitEOL();
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}
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void MCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
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assert(MAI.hasDotTypeDotSizeDirective());
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OS << "\t.size\t" << *Symbol << ", " << *Value << '\n';
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}
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void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) {
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OS << "\t.comm\t" << *Symbol << ',' << Size;
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if (ByteAlignment != 0) {
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if (MAI.getCOMMDirectiveAlignmentIsInBytes())
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OS << ',' << ByteAlignment;
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else
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OS << ',' << Log2_32(ByteAlignment);
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}
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EmitEOL();
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}
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/// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
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///
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/// @param Symbol - The common symbol to emit.
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/// @param Size - The size of the common symbol.
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void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
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assert(MAI.hasLCOMMDirective() && "Doesn't have .lcomm, can't emit it!");
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OS << "\t.lcomm\t" << *Symbol << ',' << Size;
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EmitEOL();
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}
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void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
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unsigned Size, unsigned ByteAlignment) {
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// Note: a .zerofill directive does not switch sections.
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OS << ".zerofill ";
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// This is a mach-o specific directive.
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const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section);
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OS << MOSection->getSegmentName() << "," << MOSection->getSectionName();
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if (Symbol != NULL) {
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OS << ',' << *Symbol << ',' << Size;
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if (ByteAlignment != 0)
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OS << ',' << Log2_32(ByteAlignment);
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}
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EmitEOL();
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}
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// .tbss sym, size, align
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// This depends that the symbol has already been mangled from the original,
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// e.g. _a.
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void MCAsmStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment) {
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assert(Symbol != NULL && "Symbol shouldn't be NULL!");
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// Instead of using the Section we'll just use the shortcut.
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// This is a mach-o specific directive and section.
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OS << ".tbss " << *Symbol << ", " << Size;
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// Output align if we have it. We default to 1 so don't bother printing
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// that.
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if (ByteAlignment > 1) OS << ", " << Log2_32(ByteAlignment);
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EmitEOL();
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}
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static inline char toOctal(int X) { return (X&7)+'0'; }
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|
|
|
static void PrintQuotedString(StringRef Data, raw_ostream &OS) {
|
|
OS << '"';
|
|
|
|
for (unsigned i = 0, e = Data.size(); i != e; ++i) {
|
|
unsigned char C = Data[i];
|
|
if (C == '"' || C == '\\') {
|
|
OS << '\\' << (char)C;
|
|
continue;
|
|
}
|
|
|
|
if (isprint((unsigned char)C)) {
|
|
OS << (char)C;
|
|
continue;
|
|
}
|
|
|
|
switch (C) {
|
|
case '\b': OS << "\\b"; break;
|
|
case '\f': OS << "\\f"; break;
|
|
case '\n': OS << "\\n"; break;
|
|
case '\r': OS << "\\r"; break;
|
|
case '\t': OS << "\\t"; break;
|
|
default:
|
|
OS << '\\';
|
|
OS << toOctal(C >> 6);
|
|
OS << toOctal(C >> 3);
|
|
OS << toOctal(C >> 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
OS << '"';
|
|
}
|
|
|
|
|
|
void MCAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
|
|
assert(getCurrentSection() && "Cannot emit contents before setting section!");
|
|
if (Data.empty()) return;
|
|
|
|
if (Data.size() == 1) {
|
|
OS << MAI.getData8bitsDirective(AddrSpace);
|
|
OS << (unsigned)(unsigned char)Data[0];
|
|
EmitEOL();
|
|
return;
|
|
}
|
|
|
|
// If the data ends with 0 and the target supports .asciz, use it, otherwise
|
|
// use .ascii
|
|
if (MAI.getAscizDirective() && Data.back() == 0) {
|
|
OS << MAI.getAscizDirective();
|
|
Data = Data.substr(0, Data.size()-1);
|
|
} else {
|
|
OS << MAI.getAsciiDirective();
|
|
}
|
|
|
|
OS << ' ';
|
|
PrintQuotedString(Data, OS);
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size,
|
|
unsigned AddrSpace) {
|
|
EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
|
|
}
|
|
|
|
void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
|
|
bool isPCRel, unsigned AddrSpace) {
|
|
assert(getCurrentSection() && "Cannot emit contents before setting section!");
|
|
assert(!isPCRel && "Cannot emit pc relative relocations!");
|
|
const char *Directive = 0;
|
|
switch (Size) {
|
|
default: break;
|
|
case 1: Directive = MAI.getData8bitsDirective(AddrSpace); break;
|
|
case 2: Directive = MAI.getData16bitsDirective(AddrSpace); break;
|
|
case 4: Directive = MAI.getData32bitsDirective(AddrSpace); break;
|
|
case 8:
|
|
Directive = MAI.getData64bitsDirective(AddrSpace);
|
|
// If the target doesn't support 64-bit data, emit as two 32-bit halves.
|
|
if (Directive) break;
|
|
int64_t IntValue;
|
|
if (!Value->EvaluateAsAbsolute(IntValue))
|
|
report_fatal_error("Don't know how to emit this value.");
|
|
if (getContext().getTargetAsmInfo().isLittleEndian()) {
|
|
EmitIntValue((uint32_t)(IntValue >> 0 ), 4, AddrSpace);
|
|
EmitIntValue((uint32_t)(IntValue >> 32), 4, AddrSpace);
|
|
} else {
|
|
EmitIntValue((uint32_t)(IntValue >> 32), 4, AddrSpace);
|
|
EmitIntValue((uint32_t)(IntValue >> 0 ), 4, AddrSpace);
|
|
}
|
|
return;
|
|
}
|
|
|
|
assert(Directive && "Invalid size for machine code value!");
|
|
OS << Directive << *Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value) {
|
|
int64_t IntValue;
|
|
if (Value->EvaluateAsAbsolute(IntValue)) {
|
|
EmitULEB128IntValue(IntValue);
|
|
return;
|
|
}
|
|
assert(MAI.hasLEB128() && "Cannot print a .uleb");
|
|
OS << ".uleb128 " << *Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) {
|
|
int64_t IntValue;
|
|
if (Value->EvaluateAsAbsolute(IntValue)) {
|
|
EmitSLEB128IntValue(IntValue);
|
|
return;
|
|
}
|
|
assert(MAI.hasLEB128() && "Cannot print a .sleb");
|
|
OS << ".sleb128 " << *Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
|
|
assert(MAI.getGPRel32Directive() != 0);
|
|
OS << MAI.getGPRel32Directive() << *Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
|
|
/// EmitFill - Emit NumBytes bytes worth of the value specified by
|
|
/// FillValue. This implements directives such as '.space'.
|
|
void MCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
|
|
unsigned AddrSpace) {
|
|
if (NumBytes == 0) return;
|
|
|
|
if (AddrSpace == 0)
|
|
if (const char *ZeroDirective = MAI.getZeroDirective()) {
|
|
OS << ZeroDirective << NumBytes;
|
|
if (FillValue != 0)
|
|
OS << ',' << (int)FillValue;
|
|
EmitEOL();
|
|
return;
|
|
}
|
|
|
|
// Emit a byte at a time.
|
|
MCStreamer::EmitFill(NumBytes, FillValue, AddrSpace);
|
|
}
|
|
|
|
void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
|
|
unsigned ValueSize,
|
|
unsigned MaxBytesToEmit) {
|
|
// Some assemblers don't support non-power of two alignments, so we always
|
|
// emit alignments as a power of two if possible.
|
|
if (isPowerOf2_32(ByteAlignment)) {
|
|
switch (ValueSize) {
|
|
default: llvm_unreachable("Invalid size for machine code value!");
|
|
case 1: OS << MAI.getAlignDirective(); break;
|
|
// FIXME: use MAI for this!
|
|
case 2: OS << ".p2alignw "; break;
|
|
case 4: OS << ".p2alignl "; break;
|
|
case 8: llvm_unreachable("Unsupported alignment size!");
|
|
}
|
|
|
|
if (MAI.getAlignmentIsInBytes())
|
|
OS << ByteAlignment;
|
|
else
|
|
OS << Log2_32(ByteAlignment);
|
|
|
|
if (Value || MaxBytesToEmit) {
|
|
OS << ", 0x";
|
|
OS.write_hex(truncateToSize(Value, ValueSize));
|
|
|
|
if (MaxBytesToEmit)
|
|
OS << ", " << MaxBytesToEmit;
|
|
}
|
|
EmitEOL();
|
|
return;
|
|
}
|
|
|
|
// Non-power of two alignment. This is not widely supported by assemblers.
|
|
// FIXME: Parameterize this based on MAI.
|
|
switch (ValueSize) {
|
|
default: llvm_unreachable("Invalid size for machine code value!");
|
|
case 1: OS << ".balign"; break;
|
|
case 2: OS << ".balignw"; break;
|
|
case 4: OS << ".balignl"; break;
|
|
case 8: llvm_unreachable("Unsupported alignment size!");
|
|
}
|
|
|
|
OS << ' ' << ByteAlignment;
|
|
OS << ", " << truncateToSize(Value, ValueSize);
|
|
if (MaxBytesToEmit)
|
|
OS << ", " << MaxBytesToEmit;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCodeAlignment(unsigned ByteAlignment,
|
|
unsigned MaxBytesToEmit) {
|
|
// Emit with a text fill value.
|
|
EmitValueToAlignment(ByteAlignment, MAI.getTextAlignFillValue(),
|
|
1, MaxBytesToEmit);
|
|
}
|
|
|
|
void MCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
|
|
unsigned char Value) {
|
|
// FIXME: Verify that Offset is associated with the current section.
|
|
OS << ".org " << *Offset << ", " << (unsigned) Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
|
|
void MCAsmStreamer::EmitFileDirective(StringRef Filename) {
|
|
assert(MAI.hasSingleParameterDotFile());
|
|
OS << "\t.file\t";
|
|
PrintQuotedString(Filename, OS);
|
|
EmitEOL();
|
|
}
|
|
|
|
bool MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo, StringRef Filename){
|
|
if (UseLoc) {
|
|
OS << "\t.file\t" << FileNo << ' ';
|
|
PrintQuotedString(Filename, OS);
|
|
EmitEOL();
|
|
}
|
|
return this->MCStreamer::EmitDwarfFileDirective(FileNo, Filename);
|
|
}
|
|
|
|
void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
|
|
unsigned Column, unsigned Flags,
|
|
unsigned Isa,
|
|
unsigned Discriminator,
|
|
StringRef FileName) {
|
|
this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags,
|
|
Isa, Discriminator, FileName);
|
|
if (!UseLoc)
|
|
return;
|
|
|
|
OS << "\t.loc\t" << FileNo << " " << Line << " " << Column;
|
|
if (Flags & DWARF2_FLAG_BASIC_BLOCK)
|
|
OS << " basic_block";
|
|
if (Flags & DWARF2_FLAG_PROLOGUE_END)
|
|
OS << " prologue_end";
|
|
if (Flags & DWARF2_FLAG_EPILOGUE_BEGIN)
|
|
OS << " epilogue_begin";
|
|
|
|
unsigned OldFlags = getContext().getCurrentDwarfLoc().getFlags();
|
|
if ((Flags & DWARF2_FLAG_IS_STMT) != (OldFlags & DWARF2_FLAG_IS_STMT)) {
|
|
OS << " is_stmt ";
|
|
|
|
if (Flags & DWARF2_FLAG_IS_STMT)
|
|
OS << "1";
|
|
else
|
|
OS << "0";
|
|
}
|
|
|
|
if (Isa)
|
|
OS << "isa " << Isa;
|
|
if (Discriminator)
|
|
OS << "discriminator " << Discriminator;
|
|
|
|
if (IsVerboseAsm) {
|
|
OS.PadToColumn(MAI.getCommentColumn());
|
|
OS << MAI.getCommentString() << ' ' << FileName << ':'
|
|
<< Line << ':' << Column;
|
|
}
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIStartProc() {
|
|
MCStreamer::EmitCFIStartProc();
|
|
|
|
OS << "\t.cfi_startproc";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIEndProc() {
|
|
MCStreamer::EmitCFIEndProc();
|
|
|
|
OS << "\t.cfi_endproc";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
|
|
abort();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
|
|
MCStreamer::EmitCFIDefCfaOffset(Offset);
|
|
|
|
OS << "\t.cfi_def_cfa_offset " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) {
|
|
MCStreamer::EmitCFIDefCfaRegister(Register);
|
|
|
|
OS << "\t.cfi_def_cfa_register " << Register;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
|
|
this->MCStreamer::EmitCFIOffset(Register, Offset);
|
|
|
|
OS << "\t.cfi_offset " << Register << ", " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym,
|
|
unsigned Encoding) {
|
|
MCStreamer::EmitCFIPersonality(Sym, Encoding);
|
|
|
|
OS << "\t.cfi_personality " << Encoding << ", " << *Sym;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
|
|
MCStreamer::EmitCFILsda(Sym, Encoding);
|
|
|
|
OS << "\t.cfi_lsda " << Encoding << ", " << *Sym;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIRememberState() {
|
|
MCStreamer::EmitCFIRememberState();
|
|
|
|
OS << "\t.cfi_remember_state";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIRestoreState() {
|
|
MCStreamer::EmitCFIRestoreState();
|
|
|
|
OS << "\t.cfi_restore_state";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFISameValue(int64_t Register) {
|
|
MCStreamer::EmitCFISameValue(Register);
|
|
|
|
OS << "\t.cfi_same_value " << Register;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
|
|
MCStreamer::EmitCFIRelOffset(Register, Offset);
|
|
|
|
OS << "\t.cfi_rel_offset " << Register << ", " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
|
|
MCStreamer::EmitCFIAdjustCfaOffset(Adjustment);
|
|
|
|
OS << "\t.cfi_adjust_cfa_offset " << Adjustment;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) {
|
|
raw_ostream &OS = GetCommentOS();
|
|
SmallString<256> Code;
|
|
SmallVector<MCFixup, 4> Fixups;
|
|
raw_svector_ostream VecOS(Code);
|
|
Emitter->EncodeInstruction(Inst, VecOS, Fixups);
|
|
VecOS.flush();
|
|
|
|
// If we are showing fixups, create symbolic markers in the encoded
|
|
// representation. We do this by making a per-bit map to the fixup item index,
|
|
// then trying to display it as nicely as possible.
|
|
SmallVector<uint8_t, 64> FixupMap;
|
|
FixupMap.resize(Code.size() * 8);
|
|
for (unsigned i = 0, e = Code.size() * 8; i != e; ++i)
|
|
FixupMap[i] = 0;
|
|
|
|
for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
|
|
MCFixup &F = Fixups[i];
|
|
const MCFixupKindInfo &Info = AsmBackend->getFixupKindInfo(F.getKind());
|
|
for (unsigned j = 0; j != Info.TargetSize; ++j) {
|
|
unsigned Index = F.getOffset() * 8 + Info.TargetOffset + j;
|
|
assert(Index < Code.size() * 8 && "Invalid offset in fixup!");
|
|
FixupMap[Index] = 1 + i;
|
|
}
|
|
}
|
|
|
|
// FIXME: Node the fixup comments for Thumb2 are completely bogus since the
|
|
// high order halfword of a 32-bit Thumb2 instruction is emitted first.
|
|
OS << "encoding: [";
|
|
for (unsigned i = 0, e = Code.size(); i != e; ++i) {
|
|
if (i)
|
|
OS << ',';
|
|
|
|
// See if all bits are the same map entry.
|
|
uint8_t MapEntry = FixupMap[i * 8 + 0];
|
|
for (unsigned j = 1; j != 8; ++j) {
|
|
if (FixupMap[i * 8 + j] == MapEntry)
|
|
continue;
|
|
|
|
MapEntry = uint8_t(~0U);
|
|
break;
|
|
}
|
|
|
|
if (MapEntry != uint8_t(~0U)) {
|
|
if (MapEntry == 0) {
|
|
OS << format("0x%02x", uint8_t(Code[i]));
|
|
} else {
|
|
if (Code[i]) {
|
|
// FIXME: Some of the 8 bits require fix up.
|
|
OS << format("0x%02x", uint8_t(Code[i])) << '\''
|
|
<< char('A' + MapEntry - 1) << '\'';
|
|
} else
|
|
OS << char('A' + MapEntry - 1);
|
|
}
|
|
} else {
|
|
// Otherwise, write out in binary.
|
|
OS << "0b";
|
|
for (unsigned j = 8; j--;) {
|
|
unsigned Bit = (Code[i] >> j) & 1;
|
|
|
|
unsigned FixupBit;
|
|
if (getContext().getTargetAsmInfo().isLittleEndian())
|
|
FixupBit = i * 8 + j;
|
|
else
|
|
FixupBit = i * 8 + (7-j);
|
|
|
|
if (uint8_t MapEntry = FixupMap[FixupBit]) {
|
|
assert(Bit == 0 && "Encoder wrote into fixed up bit!");
|
|
OS << char('A' + MapEntry - 1);
|
|
} else
|
|
OS << Bit;
|
|
}
|
|
}
|
|
}
|
|
OS << "]\n";
|
|
|
|
for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
|
|
MCFixup &F = Fixups[i];
|
|
const MCFixupKindInfo &Info = AsmBackend->getFixupKindInfo(F.getKind());
|
|
OS << " fixup " << char('A' + i) << " - " << "offset: " << F.getOffset()
|
|
<< ", value: " << *F.getValue() << ", kind: " << Info.Name << "\n";
|
|
}
|
|
}
|
|
|
|
void MCAsmStreamer::EmitFnStart() {
|
|
OS << "\t.fnstart";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitFnEnd() {
|
|
OS << "\t.fnend";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCantUnwind() {
|
|
OS << "\t.cantunwind";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitHandlerData() {
|
|
OS << "\t.handlerdata";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitPersonality(const MCSymbol *Personality) {
|
|
OS << "\t.personality " << Personality->getName();
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
|
|
OS << "\t.setfp\t" << InstPrinter->getRegName(FpReg)
|
|
<< ", " << InstPrinter->getRegName(SpReg);
|
|
if (Offset)
|
|
OS << ", #" << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitPad(int64_t Offset) {
|
|
OS << "\t.pad\t#" << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
|
|
bool isVector) {
|
|
assert(RegList.size() && "RegList should not be empty");
|
|
if (isVector)
|
|
OS << "\t.vsave\t{";
|
|
else
|
|
OS << "\t.save\t{";
|
|
|
|
OS << InstPrinter->getRegName(RegList[0]);
|
|
|
|
for (unsigned i = 1, e = RegList.size(); i != e; ++i)
|
|
OS << ", " << InstPrinter->getRegName(RegList[i]);
|
|
|
|
OS << "}";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
|
|
assert(getCurrentSection() && "Cannot emit contents before setting section!");
|
|
|
|
if (!UseLoc)
|
|
MCLineEntry::Make(this, getCurrentSection());
|
|
|
|
// Show the encoding in a comment if we have a code emitter.
|
|
if (Emitter)
|
|
AddEncodingComment(Inst);
|
|
|
|
// Show the MCInst if enabled.
|
|
if (ShowInst) {
|
|
Inst.dump_pretty(GetCommentOS(), &MAI, InstPrinter.get(), "\n ");
|
|
GetCommentOS() << "\n";
|
|
}
|
|
|
|
// If we have an AsmPrinter, use that to print, otherwise print the MCInst.
|
|
if (InstPrinter)
|
|
InstPrinter->printInst(&Inst, OS);
|
|
else
|
|
Inst.print(OS, &MAI);
|
|
EmitEOL();
|
|
}
|
|
|
|
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
|
|
/// the specified string in the output .s file. This capability is
|
|
/// indicated by the hasRawTextSupport() predicate.
|
|
void MCAsmStreamer::EmitRawText(StringRef String) {
|
|
if (!String.empty() && String.back() == '\n')
|
|
String = String.substr(0, String.size()-1);
|
|
OS << String;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::Finish() {
|
|
// Dump out the dwarf file & directory tables and line tables.
|
|
if (getContext().hasDwarfFiles() && !UseLoc)
|
|
MCDwarfFileTable::Emit(this);
|
|
}
|
|
|
|
MCStreamer *llvm::createAsmStreamer(MCContext &Context,
|
|
formatted_raw_ostream &OS,
|
|
bool isVerboseAsm, bool useLoc,
|
|
MCInstPrinter *IP, MCCodeEmitter *CE,
|
|
TargetAsmBackend *TAB, bool ShowInst) {
|
|
return new MCAsmStreamer(Context, OS, isVerboseAsm, useLoc,
|
|
IP, CE, TAB, ShowInst);
|
|
}
|