//===----------------------------------------------------------------------===//
#include "llvm/MC/MCStreamer.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCWin64EH.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/LEB128.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
using namespace llvm;
-MCStreamer::MCStreamer(MCContext &_Context) : Context(_Context), CurSection(0) {
+// Pin the vtables to this file.
+MCTargetStreamer::~MCTargetStreamer() {}
+
+MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
+ S.setTargetStreamer(this);
+}
+
+void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
+
+void MCTargetStreamer::finish() {}
+
+void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
+
+MCStreamer::MCStreamer(MCContext &Ctx)
+ : Context(Ctx), CurrentWinFrameInfo(nullptr) {
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
MCStreamer::~MCStreamer() {
+ for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
+ delete WinFrameInfos[i];
+}
+
+void MCStreamer::reset() {
+ DwarfFrameInfos.clear();
+ for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
+ delete WinFrameInfos[i];
+ WinFrameInfos.clear();
+ CurrentWinFrameInfo = nullptr;
+ SymbolOrdering.clear();
+ SectionStack.clear();
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
raw_ostream &MCStreamer::GetCommentOS() {
return nulls();
}
+void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
+
+void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
+ for (auto &FI : DwarfFrameInfos)
+ FI.CompactUnwindEncoding =
+ (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
+}
/// EmitIntValue - Special case of EmitValue that avoids the client having to
/// pass in a MCExpr for constant integers.
-void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
- unsigned AddrSpace) {
- EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
+void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
+ assert(1 <= Size && Size <= 8 && "Invalid size");
+ assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
+ "Invalid size");
+ char buf[8];
+ const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
+ for (unsigned i = 0; i != Size; ++i) {
+ unsigned index = isLittleEndian ? i : (Size - i - 1);
+ buf[i] = uint8_t(Value >> (index * 8));
+ }
+ EmitBytes(StringRef(buf, Size));
+}
+
+/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
+/// client having to pass in a MCExpr for constant integers.
+void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
+ SmallString<128> Tmp;
+ raw_svector_ostream OSE(Tmp);
+ encodeULEB128(Value, OSE, Padding);
+ EmitBytes(OSE.str());
+}
+
+/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
+/// client having to pass in a MCExpr for constant integers.
+void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
+ SmallString<128> Tmp;
+ raw_svector_ostream OSE(Tmp);
+ encodeSLEB128(Value, OSE);
+ EmitBytes(OSE.str());
+}
+
+void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) {
+ EmitValueImpl(Value, Size, Loc);
}
void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
- unsigned AddrSpace) {
- EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
+ bool IsSectionRelative) {
+ assert((!IsSectionRelative || Size == 4) &&
+ "SectionRelative value requires 4-bytes");
+
+ if (!IsSectionRelative)
+ EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
+ else
+ EmitCOFFSecRel32(Sym);
+}
+
+void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
+ report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
+ report_fatal_error("unsupported directive in streamer");
}
/// EmitFill - Emit NumBytes bytes worth of the value specified by
/// FillValue. This implements directives such as '.space'.
-void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
- unsigned AddrSpace) {
+void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
for (uint64_t i = 0, e = NumBytes; i != e; ++i)
- EmitValue(E, 1, AddrSpace);
+ EmitValue(E, 1);
+}
+
+/// The implementation in this class just redirects to EmitFill.
+void MCStreamer::EmitZeros(uint64_t NumBytes) {
+ EmitFill(NumBytes, 0);
+}
+
+unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
+ StringRef Directory,
+ StringRef Filename, unsigned CUID) {
+ return getContext().getDwarfFile(Directory, Filename, FileNo, CUID);
+}
+
+void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
+ unsigned Column, unsigned Flags,
+ unsigned Isa,
+ unsigned Discriminator,
+ StringRef FileName) {
+ getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
+ Discriminator);
+}
+
+MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
+ MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
+ if (!Table.getLabel()) {
+ StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
+ Table.setLabel(
+ Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
+ }
+ return Table.getLabel();
+}
+
+MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
+ if (DwarfFrameInfos.empty())
+ return nullptr;
+ return &DwarfFrameInfos.back();
+}
+
+void MCStreamer::EnsureValidDwarfFrame() {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame || CurFrame->End)
+ report_fatal_error("No open frame");
+}
+
+void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
+ MCSymbol *EHSymbol) {
+}
+
+void MCStreamer::InitSections(bool NoExecStack) {
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+}
+
+void MCStreamer::AssignSection(MCSymbol *Symbol, MCSection *Section) {
+ if (Section)
+ Symbol->setSection(*Section);
+ else
+ Symbol->setUndefined();
+
+ // As we emit symbols into a section, track the order so that they can
+ // be sorted upon later. Zero is reserved to mean 'unemitted'.
+ SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
+}
+
+void MCStreamer::EmitLabel(MCSymbol *Symbol) {
+ assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+ assert(getCurrentSection().first && "Cannot emit before setting section!");
+ AssignSection(Symbol, getCurrentSection().first);
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitLabel(Symbol);
+}
+
+void MCStreamer::EmitCFISections(bool EH, bool Debug) {
+ assert(EH || Debug);
+}
+
+void MCStreamer::EmitCFIStartProc(bool IsSimple) {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (CurFrame && !CurFrame->End)
+ report_fatal_error("Starting a frame before finishing the previous one!");
+
+ MCDwarfFrameInfo Frame;
+ Frame.IsSimple = IsSimple;
+ EmitCFIStartProcImpl(Frame);
+
+ const MCAsmInfo* MAI = Context.getAsmInfo();
+ if (MAI) {
+ for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) {
+ if (Inst.getOperation() == MCCFIInstruction::OpDefCfa ||
+ Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) {
+ Frame.CurrentCfaRegister = Inst.getRegister();
+ }
+ }
+ }
+
+ DwarfFrameInfos.push_back(Frame);
+}
+
+void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+}
+
+void MCStreamer::EmitCFIEndProc() {
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ EmitCFIEndProcImpl(*CurFrame);
+}
+
+void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+ // Put a dummy non-null value in Frame.End to mark that this frame has been
+ // closed.
+ Frame.End = (MCSymbol *) 1;
+}
+
+MCSymbol *MCStreamer::EmitCFICommon() {
+ EnsureValidDwarfFrame();
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+ return Label;
+}
+
+void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfa(Label, Register, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+ CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
+}
+
+void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaOffset(Label, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaRegister(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+ CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
+}
+
+void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createOffset(Label, Register, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRelOffset(Label, Register, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
+ unsigned Encoding) {
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Personality = Sym;
+ CurFrame->PersonalityEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Lsda = Sym;
+ CurFrame->LsdaEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFIRememberState() {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestoreState() {
+ // FIXME: Error if there is no matching cfi_remember_state.
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISameValue(int64_t Register) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createSameValue(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestore(int64_t Register) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRestore(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIEscape(StringRef Values) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISignalFrame() {
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->IsSignalFrame = true;
+}
+
+void MCStreamer::EmitCFIUndefined(int64_t Register) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createUndefined(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRegister(Label, Register1, Register2);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIWindowSave() {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createWindowSave(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EnsureValidWinFrameInfo() {
+ const MCAsmInfo *MAI = Context.getAsmInfo();
+ if (!MAI->usesWindowsCFI())
+ report_fatal_error(".seh_* directives are not supported on this target");
+ if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
+ report_fatal_error("No open Win64 EH frame function!");
+}
+
+void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
+ const MCAsmInfo *MAI = Context.getAsmInfo();
+ if (!MAI->usesWindowsCFI())
+ report_fatal_error(".seh_* directives are not supported on this target");
+ if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
+ report_fatal_error("Starting a function before ending the previous one!");
+
+ MCSymbol *StartProc = getContext().createTempSymbol();
+ EmitLabel(StartProc);
+
+ WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
+ CurrentWinFrameInfo = WinFrameInfos.back();
+}
+
+void MCStreamer::EmitWinCFIEndProc() {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->ChainedParent)
+ report_fatal_error("Not all chained regions terminated!");
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+ CurrentWinFrameInfo->End = Label;
+}
+
+void MCStreamer::EmitWinCFIStartChained() {
+ EnsureValidWinFrameInfo();
+
+ MCSymbol *StartProc = getContext().createTempSymbol();
+ EmitLabel(StartProc);
+
+ WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
+ StartProc, CurrentWinFrameInfo));
+ CurrentWinFrameInfo = WinFrameInfos.back();
+}
+
+void MCStreamer::EmitWinCFIEndChained() {
+ EnsureValidWinFrameInfo();
+ if (!CurrentWinFrameInfo->ChainedParent)
+ report_fatal_error("End of a chained region outside a chained region!");
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ CurrentWinFrameInfo->End = Label;
+ CurrentWinFrameInfo =
+ const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
}
-/// EmitRawText - If this file is backed by a assembly streamer, this dumps
+void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
+ bool Except) {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->ChainedParent)
+ report_fatal_error("Chained unwind areas can't have handlers!");
+ CurrentWinFrameInfo->ExceptionHandler = Sym;
+ if (!Except && !Unwind)
+ report_fatal_error("Don't know what kind of handler this is!");
+ if (Unwind)
+ CurrentWinFrameInfo->HandlesUnwind = true;
+ if (Except)
+ CurrentWinFrameInfo->HandlesExceptions = true;
+}
+
+void MCStreamer::EmitWinEHHandlerData() {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->ChainedParent)
+ report_fatal_error("Chained unwind areas can't have handlers!");
+}
+
+void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
+ EnsureValidWinFrameInfo();
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->LastFrameInst >= 0)
+ report_fatal_error("Frame register and offset already specified!");
+ if (Offset & 0x0F)
+ report_fatal_error("Misaligned frame pointer offset!");
+ if (Offset > 240)
+ report_fatal_error("Frame offset must be less than or equal to 240!");
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SetFPReg(Label, Register, Offset);
+ CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
+ EnsureValidWinFrameInfo();
+ if (Size == 0)
+ report_fatal_error("Allocation size must be non-zero!");
+ if (Size & 7)
+ report_fatal_error("Misaligned stack allocation!");
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
+ EnsureValidWinFrameInfo();
+ if (Offset & 7)
+ report_fatal_error("Misaligned saved register offset!");
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
+ EnsureValidWinFrameInfo();
+ if (Offset & 0x0F)
+ report_fatal_error("Misaligned saved vector register offset!");
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SaveXMM(Label, Register, Offset);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIPushFrame(bool Code) {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->Instructions.size() > 0)
+ report_fatal_error("If present, PushMachFrame must be the first UOP");
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIEndProlog() {
+ EnsureValidWinFrameInfo();
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ CurrentWinFrameInfo->PrologEnd = Label;
+}
+
+void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
+}
+
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+}
+
+/// 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 MCStreamer::EmitRawText(StringRef String) {
+void MCStreamer::EmitRawTextImpl(StringRef String) {
errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
" something must not be fully mc'ized\n";
abort();
}
+
+void MCStreamer::EmitRawText(const Twine &T) {
+ SmallString<128> Str;
+ EmitRawTextImpl(T.toStringRef(Str));
+}
+
+void MCStreamer::EmitWindowsUnwindTables() {
+}
+
+void MCStreamer::Finish() {
+ if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
+ report_fatal_error("Unfinished frame!");
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->finish();
+
+ FinishImpl();
+}
+
+void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ visitUsedExpr(*Value);
+ Symbol->setVariableValue(Value);
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitAssignment(Symbol, Value);
+}
+
+void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
+}
+
+void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
+ switch (Expr.getKind()) {
+ case MCExpr::Target:
+ cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
+ break;
+
+ case MCExpr::Constant:
+ break;
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
+ visitUsedExpr(*BE.getLHS());
+ visitUsedExpr(*BE.getRHS());
+ break;
+ }
+
+ case MCExpr::SymbolRef:
+ visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
+ break;
+
+ case MCExpr::Unary:
+ visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
+ break;
+ }
+}
+
+void MCStreamer::EmitInstruction(const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
+ // Scan for values.
+ for (unsigned i = Inst.getNumOperands(); i--;)
+ if (Inst.getOperand(i).isExpr())
+ visitUsedExpr(*Inst.getOperand(i).getExpr());
+}
+
+void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
+void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
+void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
+void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
+void MCStreamer::EndCOFFSymbolDef() {}
+void MCStreamer::EmitFileDirective(StringRef Filename) {}
+void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
+void MCStreamer::EmitCOFFSymbolType(int Type) {}
+void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
+void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {}
+void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment) {}
+void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {}
+void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
+void MCStreamer::EmitBytes(StringRef Data) {}
+void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) {
+ visitUsedExpr(*Value);
+}
+void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {}
+void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit) {}
+bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) {
+ return false;
+}
+void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
+void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
+void MCStreamer::FinishImpl() {}
+void MCStreamer::EmitBundleUnlock() {}
+
+void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) {
+ assert(Section && "Cannot switch to a null section!");
+ MCSectionSubPair curSection = SectionStack.back().first;
+ SectionStack.back().second = curSection;
+ if (MCSectionSubPair(Section, Subsection) != curSection) {
+ ChangeSection(Section, Subsection);
+ SectionStack.back().first = MCSectionSubPair(Section, Subsection);
+ assert(!Section->hasEnded() && "Section already ended");
+ MCSymbol *Sym = Section->getBeginSymbol();
+ if (Sym && !Sym->isInSection())
+ EmitLabel(Sym);
+ }
+}
+
+MCSymbol *MCStreamer::endSection(MCSection *Section) {
+ // TODO: keep track of the last subsection so that this symbol appears in the
+ // correct place.
+ MCSymbol *Sym = Section->getEndSymbol(Context);
+ if (Sym->isInSection())
+ return Sym;
+
+ SwitchSection(Section);
+ EmitLabel(Sym);
+ return Sym;
+}
projects / oota-llvm.git / blobdiff