mirror of
https://github.com/c64scene-ar/llvm-6502.git
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e0d2a2939d
.safeseh adds an entry to the .sxdata section to register all the appropriate functions which may handle an exception. This entry is not a relocation to the symbol but instead the symbol table index of the function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238641 91177308-0d34-0410-b5e6-96231b3b80d8
1327 lines
42 KiB
C++
1327 lines
42 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/ADT/STLExtras.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAsmBackend.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/MCObjectFileInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSectionCOFF.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/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.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/Support/MathExtras.h"
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#include "llvm/Support/Path.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 final : public MCStreamer {
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std::unique_ptr<formatted_raw_ostream> OSOwner;
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formatted_raw_ostream &OS;
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const MCAsmInfo *MAI;
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std::unique_ptr<MCInstPrinter> InstPrinter;
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std::unique_ptr<MCCodeEmitter> Emitter;
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std::unique_ptr<MCAsmBackend> 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 UseDwarfDirectory : 1;
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void EmitRegisterName(int64_t Register);
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void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
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void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override;
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public:
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MCAsmStreamer(MCContext &Context, std::unique_ptr<formatted_raw_ostream> os,
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bool isVerboseAsm, bool useDwarfDirectory,
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MCInstPrinter *printer, MCCodeEmitter *emitter,
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MCAsmBackend *asmbackend, bool showInst)
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: MCStreamer(Context), OSOwner(std::move(os)), OS(*OSOwner),
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MAI(Context.getAsmInfo()), InstPrinter(printer), Emitter(emitter),
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AsmBackend(asmbackend), CommentStream(CommentToEmit),
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IsVerboseAsm(isVerboseAsm), ShowInst(showInst),
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UseDwarfDirectory(useDwarfDirectory) {
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assert(InstPrinter);
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if (IsVerboseAsm)
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InstPrinter->setCommentStream(CommentStream);
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}
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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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bool isVerboseAsm() const override { return IsVerboseAsm; }
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/// hasRawTextSupport - We support EmitRawText.
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bool hasRawTextSupport() const override { 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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void AddComment(const Twine &T) override;
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/// AddEncodingComment - Add a comment showing the encoding of an instruction.
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void AddEncodingComment(const MCInst &Inst, const MCSubtargetInfo &);
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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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raw_ostream &GetCommentOS() override {
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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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void emitRawComment(const Twine &T, bool TabPrefix = true) override;
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/// AddBlankLine - Emit a blank line to a .s file to pretty it up.
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void AddBlankLine() override {
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EmitEOL();
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}
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/// @name MCStreamer Interface
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/// @{
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void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
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void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) override;
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void EmitLabel(MCSymbol *Symbol) override;
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void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
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void EmitLinkerOptions(ArrayRef<std::string> Options) override;
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void EmitDataRegion(MCDataRegionType Kind) override;
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void EmitVersionMin(MCVersionMinType Kind, unsigned Major, unsigned Minor,
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unsigned Update) override;
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void EmitThumbFunc(MCSymbol *Func) override;
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void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) 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 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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void EmitCOFFSafeSEH(MCSymbol const *Symbol) override;
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void EmitCOFFSectionIndex(MCSymbol const *Symbol) override;
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void EmitCOFFSecRel32(MCSymbol const *Symbol) override;
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void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
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void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) override;
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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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/// @param ByteAlignment - The alignment of the common symbol in bytes.
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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 EmitBytes(StringRef Data) 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 EmitIntValue(uint64_t Value, unsigned Size) override;
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void EmitULEB128Value(const MCExpr *Value) override;
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void EmitSLEB128Value(const MCExpr *Value) override;
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void EmitGPRel64Value(const MCExpr *Value) override;
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void EmitGPRel32Value(const MCExpr *Value) override;
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void EmitFill(uint64_t NumBytes, uint8_t FillValue) override;
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void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
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unsigned ValueSize = 1,
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unsigned MaxBytesToEmit = 0) override;
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void EmitCodeAlignment(unsigned ByteAlignment,
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unsigned MaxBytesToEmit = 0) override;
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bool EmitValueToOffset(const MCExpr *Offset,
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unsigned char Value = 0) override;
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void EmitFileDirective(StringRef Filename) override;
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unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
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StringRef Filename,
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unsigned CUID = 0) override;
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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) override;
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MCSymbol *getDwarfLineTableSymbol(unsigned CUID) override;
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void EmitIdent(StringRef IdentString) override;
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void EmitCFISections(bool EH, bool Debug) override;
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void EmitCFIDefCfa(int64_t Register, int64_t Offset) override;
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void EmitCFIDefCfaOffset(int64_t Offset) override;
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void EmitCFIDefCfaRegister(int64_t Register) override;
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void EmitCFIOffset(int64_t Register, int64_t Offset) override;
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void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) override;
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void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) override;
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void EmitCFIRememberState() override;
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void EmitCFIRestoreState() override;
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void EmitCFISameValue(int64_t Register) override;
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void EmitCFIRelOffset(int64_t Register, int64_t Offset) override;
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void EmitCFIAdjustCfaOffset(int64_t Adjustment) override;
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void EmitCFISignalFrame() override;
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void EmitCFIUndefined(int64_t Register) override;
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void EmitCFIRegister(int64_t Register1, int64_t Register2) override;
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void EmitCFIWindowSave() override;
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void EmitWinCFIStartProc(const MCSymbol *Symbol) override;
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void EmitWinCFIEndProc() override;
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void EmitWinCFIStartChained() override;
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void EmitWinCFIEndChained() override;
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void EmitWinCFIPushReg(unsigned Register) override;
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void EmitWinCFISetFrame(unsigned Register, unsigned Offset) override;
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void EmitWinCFIAllocStack(unsigned Size) override;
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void EmitWinCFISaveReg(unsigned Register, unsigned Offset) override;
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void EmitWinCFISaveXMM(unsigned Register, unsigned Offset) override;
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void EmitWinCFIPushFrame(bool Code) override;
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void EmitWinCFIEndProlog() override;
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void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except) override;
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void EmitWinEHHandlerData() override;
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void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) 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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/// 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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void EmitRawTextImpl(StringRef String) override;
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void FinishImpl() override;
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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;
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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::emitRawComment(const Twine &T, bool TabPrefix) {
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if (TabPrefix)
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OS << '\t';
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OS << MAI->getCommentString() << T;
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EmitEOL();
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}
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void MCAsmStreamer::ChangeSection(MCSection *Section,
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const MCExpr *Subsection) {
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assert(Section && "Cannot switch to a null section!");
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Section->PrintSwitchToSection(*MAI, OS, Subsection);
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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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MCStreamer::EmitLabel(Symbol);
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OS << *Symbol << MAI->getLabelSuffix();
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EmitEOL();
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}
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void MCAsmStreamer::EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) {
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StringRef str = MCLOHIdToName(Kind);
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#ifndef NDEBUG
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int NbArgs = MCLOHIdToNbArgs(Kind);
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assert(NbArgs != -1 && ((size_t)NbArgs) == Args.size() && "Malformed LOH!");
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assert(str != "" && "Invalid LOH name");
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#endif
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OS << "\t" << MCLOHDirectiveName() << " " << str << "\t";
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bool IsFirst = true;
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for (MCLOHArgs::const_iterator It = Args.begin(), EndIt = Args.end();
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It != EndIt; ++It) {
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if (!IsFirst)
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OS << ", ";
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IsFirst = false;
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OS << **It;
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}
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EmitEOL();
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}
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void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
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switch (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'<< MAI->getCode16Directive();break;
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case MCAF_Code32: OS << '\t'<< MAI->getCode32Directive();break;
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case MCAF_Code64: OS << '\t'<< MAI->getCode64Directive();break;
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}
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EmitEOL();
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}
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void MCAsmStreamer::EmitLinkerOptions(ArrayRef<std::string> Options) {
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assert(!Options.empty() && "At least one option is required!");
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OS << "\t.linker_option \"" << Options[0] << '"';
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for (ArrayRef<std::string>::iterator it = Options.begin() + 1,
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ie = Options.end(); it != ie; ++it) {
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OS << ", " << '"' << *it << '"';
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}
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OS << "\n";
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}
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void MCAsmStreamer::EmitDataRegion(MCDataRegionType Kind) {
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if (!MAI->doesSupportDataRegionDirectives())
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return;
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switch (Kind) {
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case MCDR_DataRegion: OS << "\t.data_region"; break;
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case MCDR_DataRegionJT8: OS << "\t.data_region jt8"; break;
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case MCDR_DataRegionJT16: OS << "\t.data_region jt16"; break;
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case MCDR_DataRegionJT32: OS << "\t.data_region jt32"; break;
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case MCDR_DataRegionEnd: OS << "\t.end_data_region"; break;
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}
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EmitEOL();
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}
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void MCAsmStreamer::EmitVersionMin(MCVersionMinType Kind, unsigned Major,
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unsigned Minor, unsigned Update) {
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switch (Kind) {
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case MCVM_IOSVersionMin: OS << "\t.ios_version_min"; break;
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case MCVM_OSXVersionMin: OS << "\t.macosx_version_min"; break;
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}
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OS << " " << Major << ", " << Minor;
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if (Update)
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OS << ", " << Update;
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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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// Only Mach-O hasSubsectionsViaSymbols()
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if (MAI->hasSubsectionsViaSymbols())
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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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MCStreamer::EmitAssignment(Symbol, 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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bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
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MCSymbolAttr Attribute) {
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switch (Attribute) {
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case MCSA_Invalid: llvm_unreachable("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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if (!MAI->hasDotTypeDotSizeDirective())
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return false; // Symbol attribute 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: return false;
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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 true;
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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;
|
|
case MCSA_NoDeadStrip:
|
|
if (!MAI->hasNoDeadStrip())
|
|
return false;
|
|
OS << "\t.no_dead_strip\t";
|
|
break;
|
|
case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break;
|
|
case MCSA_PrivateExtern:
|
|
OS << "\t.private_extern\t";
|
|
break;
|
|
case MCSA_Protected: OS << "\t.protected\t"; break;
|
|
case MCSA_Reference: OS << "\t.reference\t"; break;
|
|
case MCSA_Weak: OS << MAI->getWeakDirective(); break;
|
|
case MCSA_WeakDefinition:
|
|
OS << "\t.weak_definition\t";
|
|
break;
|
|
// .weak_reference
|
|
case MCSA_WeakReference: OS << MAI->getWeakRefDirective(); break;
|
|
case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break;
|
|
}
|
|
|
|
OS << *Symbol;
|
|
EmitEOL();
|
|
|
|
return true;
|
|
}
|
|
|
|
void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
|
|
OS << ".desc" << ' ' << *Symbol << ',' << DescValue;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
|
|
OS << "\t.def\t " << *Symbol << ';';
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCOFFSymbolStorageClass (int StorageClass) {
|
|
OS << "\t.scl\t" << StorageClass << ';';
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCOFFSymbolType (int Type) {
|
|
OS << "\t.type\t" << Type << ';';
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EndCOFFSymbolDef() {
|
|
OS << "\t.endef";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
|
|
OS << "\t.safeseh\t" << *Symbol;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
|
|
OS << "\t.secidx\t" << *Symbol;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
|
|
OS << "\t.secrel32\t" << *Symbol;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
|
|
assert(MAI->hasDotTypeDotSizeDirective());
|
|
OS << "\t.size\t" << *Symbol << ", " << *Value << '\n';
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
|
|
unsigned ByteAlignment) {
|
|
// Common symbols do not belong to any actual section.
|
|
AssignSection(Symbol, nullptr);
|
|
|
|
OS << "\t.comm\t" << *Symbol << ',' << Size;
|
|
if (ByteAlignment != 0) {
|
|
if (MAI->getCOMMDirectiveAlignmentIsInBytes())
|
|
OS << ',' << ByteAlignment;
|
|
else
|
|
OS << ',' << Log2_32(ByteAlignment);
|
|
}
|
|
EmitEOL();
|
|
}
|
|
|
|
/// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
|
|
///
|
|
/// @param Symbol - The common symbol to emit.
|
|
/// @param Size - The size of the common symbol.
|
|
void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
|
|
unsigned ByteAlign) {
|
|
// Common symbols do not belong to any actual section.
|
|
AssignSection(Symbol, nullptr);
|
|
|
|
OS << "\t.lcomm\t" << *Symbol << ',' << Size;
|
|
if (ByteAlign > 1) {
|
|
switch (MAI->getLCOMMDirectiveAlignmentType()) {
|
|
case LCOMM::NoAlignment:
|
|
llvm_unreachable("alignment not supported on .lcomm!");
|
|
case LCOMM::ByteAlignment:
|
|
OS << ',' << ByteAlign;
|
|
break;
|
|
case LCOMM::Log2Alignment:
|
|
assert(isPowerOf2_32(ByteAlign) && "alignment must be a power of 2");
|
|
OS << ',' << Log2_32(ByteAlign);
|
|
break;
|
|
}
|
|
}
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
|
|
uint64_t Size, unsigned ByteAlignment) {
|
|
if (Symbol)
|
|
AssignSection(Symbol, Section);
|
|
|
|
// Note: a .zerofill directive does not switch sections.
|
|
OS << ".zerofill ";
|
|
|
|
// This is a mach-o specific directive.
|
|
const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section);
|
|
OS << MOSection->getSegmentName() << "," << MOSection->getSectionName();
|
|
|
|
if (Symbol) {
|
|
OS << ',' << *Symbol << ',' << Size;
|
|
if (ByteAlignment != 0)
|
|
OS << ',' << Log2_32(ByteAlignment);
|
|
}
|
|
EmitEOL();
|
|
}
|
|
|
|
// .tbss sym, size, align
|
|
// This depends that the symbol has already been mangled from the original,
|
|
// e.g. _a.
|
|
void MCAsmStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
|
|
uint64_t Size, unsigned ByteAlignment) {
|
|
AssignSection(Symbol, Section);
|
|
|
|
assert(Symbol && "Symbol shouldn't be NULL!");
|
|
// Instead of using the Section we'll just use the shortcut.
|
|
// This is a mach-o specific directive and section.
|
|
OS << ".tbss " << *Symbol << ", " << Size;
|
|
|
|
// Output align if we have it. We default to 1 so don't bother printing
|
|
// that.
|
|
if (ByteAlignment > 1) OS << ", " << Log2_32(ByteAlignment);
|
|
|
|
EmitEOL();
|
|
}
|
|
|
|
static inline char toOctal(int X) { return (X&7)+'0'; }
|
|
|
|
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) {
|
|
assert(getCurrentSection().first &&
|
|
"Cannot emit contents before setting section!");
|
|
if (Data.empty()) return;
|
|
|
|
if (Data.size() == 1) {
|
|
OS << MAI->getData8bitsDirective();
|
|
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();
|
|
}
|
|
|
|
PrintQuotedString(Data, OS);
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
|
|
EmitValue(MCConstantExpr::create(Value, getContext()), Size);
|
|
}
|
|
|
|
void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
|
|
const SMLoc &Loc) {
|
|
assert(Size <= 8 && "Invalid size");
|
|
assert(getCurrentSection().first &&
|
|
"Cannot emit contents before setting section!");
|
|
const char *Directive = nullptr;
|
|
switch (Size) {
|
|
default: break;
|
|
case 1: Directive = MAI->getData8bitsDirective(); break;
|
|
case 2: Directive = MAI->getData16bitsDirective(); break;
|
|
case 4: Directive = MAI->getData32bitsDirective(); break;
|
|
case 8: Directive = MAI->getData64bitsDirective(); break;
|
|
}
|
|
|
|
if (!Directive) {
|
|
int64_t IntValue;
|
|
if (!Value->evaluateAsAbsolute(IntValue))
|
|
report_fatal_error("Don't know how to emit this value.");
|
|
|
|
// We couldn't handle the requested integer size so we fallback by breaking
|
|
// the request down into several, smaller, integers. Since sizes greater
|
|
// than eight are invalid and size equivalent to eight should have been
|
|
// handled earlier, we use four bytes as our largest piece of granularity.
|
|
bool IsLittleEndian = MAI->isLittleEndian();
|
|
for (unsigned Emitted = 0; Emitted != Size;) {
|
|
unsigned Remaining = Size - Emitted;
|
|
// The size of our partial emission must be a power of two less than
|
|
// eight.
|
|
unsigned EmissionSize = PowerOf2Floor(Remaining);
|
|
if (EmissionSize > 4)
|
|
EmissionSize = 4;
|
|
// Calculate the byte offset of our partial emission taking into account
|
|
// the endianness of the target.
|
|
unsigned ByteOffset =
|
|
IsLittleEndian ? Emitted : (Remaining - EmissionSize);
|
|
uint64_t ValueToEmit = IntValue >> (ByteOffset * 8);
|
|
// We truncate our partial emission to fit within the bounds of the
|
|
// emission domain. This produces nicer output and silences potential
|
|
// truncation warnings when round tripping through another assembler.
|
|
uint64_t Shift = 64 - EmissionSize * 8;
|
|
assert(Shift < static_cast<uint64_t>(
|
|
std::numeric_limits<unsigned long long>::digits) &&
|
|
"undefined behavior");
|
|
ValueToEmit &= ~0ULL >> Shift;
|
|
EmitIntValue(ValueToEmit, EmissionSize);
|
|
Emitted += EmissionSize;
|
|
}
|
|
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;
|
|
}
|
|
OS << ".uleb128 " << *Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) {
|
|
int64_t IntValue;
|
|
if (Value->evaluateAsAbsolute(IntValue)) {
|
|
EmitSLEB128IntValue(IntValue);
|
|
return;
|
|
}
|
|
OS << ".sleb128 " << *Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitGPRel64Value(const MCExpr *Value) {
|
|
assert(MAI->getGPRel64Directive() != nullptr);
|
|
OS << MAI->getGPRel64Directive() << *Value;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
|
|
assert(MAI->getGPRel32Directive() != nullptr);
|
|
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) {
|
|
if (NumBytes == 0) return;
|
|
|
|
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);
|
|
}
|
|
|
|
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 << "\t.align\t";
|
|
break;
|
|
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);
|
|
}
|
|
|
|
bool MCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
|
|
unsigned char Value) {
|
|
// FIXME: Verify that Offset is associated with the current section.
|
|
OS << ".org " << *Offset << ", " << (unsigned) Value;
|
|
EmitEOL();
|
|
return false;
|
|
}
|
|
|
|
|
|
void MCAsmStreamer::EmitFileDirective(StringRef Filename) {
|
|
assert(MAI->hasSingleParameterDotFile());
|
|
OS << "\t.file\t";
|
|
PrintQuotedString(Filename, OS);
|
|
EmitEOL();
|
|
}
|
|
|
|
unsigned MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo,
|
|
StringRef Directory,
|
|
StringRef Filename,
|
|
unsigned CUID) {
|
|
assert(CUID == 0);
|
|
|
|
MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
|
|
unsigned NumFiles = Table.getMCDwarfFiles().size();
|
|
FileNo = Table.getFile(Directory, Filename, FileNo);
|
|
if (FileNo == 0)
|
|
return 0;
|
|
if (NumFiles == Table.getMCDwarfFiles().size())
|
|
return FileNo;
|
|
|
|
SmallString<128> FullPathName;
|
|
|
|
if (!UseDwarfDirectory && !Directory.empty()) {
|
|
if (sys::path::is_absolute(Filename))
|
|
Directory = "";
|
|
else {
|
|
FullPathName = Directory;
|
|
sys::path::append(FullPathName, Filename);
|
|
Directory = "";
|
|
Filename = FullPathName;
|
|
}
|
|
}
|
|
|
|
OS << "\t.file\t" << FileNo << ' ';
|
|
if (!Directory.empty()) {
|
|
PrintQuotedString(Directory, OS);
|
|
OS << ' ';
|
|
}
|
|
PrintQuotedString(Filename, OS);
|
|
EmitEOL();
|
|
|
|
return FileNo;
|
|
}
|
|
|
|
void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
|
|
unsigned Column, unsigned Flags,
|
|
unsigned Isa,
|
|
unsigned Discriminator,
|
|
StringRef FileName) {
|
|
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();
|
|
this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags,
|
|
Isa, Discriminator, FileName);
|
|
}
|
|
|
|
MCSymbol *MCAsmStreamer::getDwarfLineTableSymbol(unsigned CUID) {
|
|
// Always use the zeroth line table, since asm syntax only supports one line
|
|
// table for now.
|
|
return MCStreamer::getDwarfLineTableSymbol(0);
|
|
}
|
|
|
|
void MCAsmStreamer::EmitIdent(StringRef IdentString) {
|
|
assert(MAI->hasIdentDirective() && ".ident directive not supported");
|
|
OS << "\t.ident\t";
|
|
PrintQuotedString(IdentString, OS);
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFISections(bool EH, bool Debug) {
|
|
MCStreamer::EmitCFISections(EH, Debug);
|
|
OS << "\t.cfi_sections ";
|
|
if (EH) {
|
|
OS << ".eh_frame";
|
|
if (Debug)
|
|
OS << ", .debug_frame";
|
|
} else if (Debug) {
|
|
OS << ".debug_frame";
|
|
}
|
|
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
|
|
OS << "\t.cfi_startproc";
|
|
if (Frame.IsSimple)
|
|
OS << " simple";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
|
|
MCStreamer::EmitCFIEndProcImpl(Frame);
|
|
OS << "\t.cfi_endproc";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitRegisterName(int64_t Register) {
|
|
if (!MAI->useDwarfRegNumForCFI()) {
|
|
const MCRegisterInfo *MRI = getContext().getRegisterInfo();
|
|
unsigned LLVMRegister = MRI->getLLVMRegNum(Register, true);
|
|
InstPrinter->printRegName(OS, LLVMRegister);
|
|
} else {
|
|
OS << Register;
|
|
}
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
|
|
MCStreamer::EmitCFIDefCfa(Register, Offset);
|
|
OS << "\t.cfi_def_cfa ";
|
|
EmitRegisterName(Register);
|
|
OS << ", " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
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 ";
|
|
EmitRegisterName(Register);
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
|
|
this->MCStreamer::EmitCFIOffset(Register, Offset);
|
|
OS << "\t.cfi_offset ";
|
|
EmitRegisterName(Register);
|
|
OS << ", " << 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 ";
|
|
EmitRegisterName(Register);
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
|
|
MCStreamer::EmitCFIRelOffset(Register, Offset);
|
|
OS << "\t.cfi_rel_offset ";
|
|
EmitRegisterName(Register);
|
|
OS << ", " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
|
|
MCStreamer::EmitCFIAdjustCfaOffset(Adjustment);
|
|
OS << "\t.cfi_adjust_cfa_offset " << Adjustment;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFISignalFrame() {
|
|
MCStreamer::EmitCFISignalFrame();
|
|
OS << "\t.cfi_signal_frame";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIUndefined(int64_t Register) {
|
|
MCStreamer::EmitCFIUndefined(Register);
|
|
OS << "\t.cfi_undefined " << Register;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
|
|
MCStreamer::EmitCFIRegister(Register1, Register2);
|
|
OS << "\t.cfi_register " << Register1 << ", " << Register2;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitCFIWindowSave() {
|
|
MCStreamer::EmitCFIWindowSave();
|
|
OS << "\t.cfi_window_save";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
|
|
MCStreamer::EmitWinCFIStartProc(Symbol);
|
|
|
|
OS << ".seh_proc " << *Symbol;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIEndProc() {
|
|
MCStreamer::EmitWinCFIEndProc();
|
|
|
|
OS << "\t.seh_endproc";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIStartChained() {
|
|
MCStreamer::EmitWinCFIStartChained();
|
|
|
|
OS << "\t.seh_startchained";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIEndChained() {
|
|
MCStreamer::EmitWinCFIEndChained();
|
|
|
|
OS << "\t.seh_endchained";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
|
|
bool Except) {
|
|
MCStreamer::EmitWinEHHandler(Sym, Unwind, Except);
|
|
|
|
OS << "\t.seh_handler " << *Sym;
|
|
if (Unwind)
|
|
OS << ", @unwind";
|
|
if (Except)
|
|
OS << ", @except";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinEHHandlerData() {
|
|
MCStreamer::EmitWinEHHandlerData();
|
|
|
|
// Switch sections. Don't call SwitchSection directly, because that will
|
|
// cause the section switch to be visible in the emitted assembly.
|
|
// We only do this so the section switch that terminates the handler
|
|
// data block is visible.
|
|
WinEH::FrameInfo *CurFrame = getCurrentWinFrameInfo();
|
|
MCSection *XData =
|
|
WinEH::UnwindEmitter::getXDataSection(CurFrame->Function, getContext());
|
|
SwitchSectionNoChange(XData);
|
|
|
|
OS << "\t.seh_handlerdata";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIPushReg(unsigned Register) {
|
|
MCStreamer::EmitWinCFIPushReg(Register);
|
|
|
|
OS << "\t.seh_pushreg " << Register;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
|
|
MCStreamer::EmitWinCFISetFrame(Register, Offset);
|
|
|
|
OS << "\t.seh_setframe " << Register << ", " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIAllocStack(unsigned Size) {
|
|
MCStreamer::EmitWinCFIAllocStack(Size);
|
|
|
|
OS << "\t.seh_stackalloc " << Size;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
|
|
MCStreamer::EmitWinCFISaveReg(Register, Offset);
|
|
|
|
OS << "\t.seh_savereg " << Register << ", " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
|
|
MCStreamer::EmitWinCFISaveXMM(Register, Offset);
|
|
|
|
OS << "\t.seh_savexmm " << Register << ", " << Offset;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIPushFrame(bool Code) {
|
|
MCStreamer::EmitWinCFIPushFrame(Code);
|
|
|
|
OS << "\t.seh_pushframe";
|
|
if (Code)
|
|
OS << " @code";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitWinCFIEndProlog(void) {
|
|
MCStreamer::EmitWinCFIEndProlog();
|
|
|
|
OS << "\t.seh_endprologue";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::AddEncodingComment(const MCInst &Inst,
|
|
const MCSubtargetInfo &STI) {
|
|
raw_ostream &OS = GetCommentOS();
|
|
SmallString<256> Code;
|
|
SmallVector<MCFixup, 4> Fixups;
|
|
raw_svector_ostream VecOS(Code);
|
|
Emitter->encodeInstruction(Inst, VecOS, Fixups, STI);
|
|
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: Note 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 (MAI->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::EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) {
|
|
assert(getCurrentSection().first &&
|
|
"Cannot emit contents before setting section!");
|
|
|
|
// Show the encoding in a comment if we have a code emitter.
|
|
if (Emitter)
|
|
AddEncodingComment(Inst, STI);
|
|
|
|
// Show the MCInst if enabled.
|
|
if (ShowInst) {
|
|
Inst.dump_pretty(GetCommentOS(), InstPrinter.get(), "\n ");
|
|
GetCommentOS() << "\n";
|
|
}
|
|
|
|
InstPrinter->printInst(&Inst, OS, "", STI);
|
|
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitBundleAlignMode(unsigned AlignPow2) {
|
|
OS << "\t.bundle_align_mode " << AlignPow2;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitBundleLock(bool AlignToEnd) {
|
|
OS << "\t.bundle_lock";
|
|
if (AlignToEnd)
|
|
OS << " align_to_end";
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::EmitBundleUnlock() {
|
|
OS << "\t.bundle_unlock";
|
|
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::EmitRawTextImpl(StringRef String) {
|
|
if (!String.empty() && String.back() == '\n')
|
|
String = String.substr(0, String.size()-1);
|
|
OS << String;
|
|
EmitEOL();
|
|
}
|
|
|
|
void MCAsmStreamer::FinishImpl() {
|
|
// If we are generating dwarf for assembly source files dump out the sections.
|
|
if (getContext().getGenDwarfForAssembly())
|
|
MCGenDwarfInfo::Emit(this);
|
|
|
|
// Emit the label for the line table, if requested - since the rest of the
|
|
// line table will be defined by .loc/.file directives, and not emitted
|
|
// directly, the label is the only work required here.
|
|
auto &Tables = getContext().getMCDwarfLineTables();
|
|
if (!Tables.empty()) {
|
|
assert(Tables.size() == 1 && "asm output only supports one line table");
|
|
if (auto *Label = Tables.begin()->second.getLabel()) {
|
|
SwitchSection(getContext().getObjectFileInfo()->getDwarfLineSection());
|
|
EmitLabel(Label);
|
|
}
|
|
}
|
|
}
|
|
|
|
MCStreamer *llvm::createAsmStreamer(MCContext &Context,
|
|
std::unique_ptr<formatted_raw_ostream> OS,
|
|
bool isVerboseAsm, bool useDwarfDirectory,
|
|
MCInstPrinter *IP, MCCodeEmitter *CE,
|
|
MCAsmBackend *MAB, bool ShowInst) {
|
|
return new MCAsmStreamer(Context, std::move(OS), isVerboseAsm,
|
|
useDwarfDirectory, IP, CE, MAB, ShowInst);
|
|
}
|