//
//===----------------------------------------------------------------------===//
//
-// This file contains an implementation of a Win32 COFF object file streamer.
+// This file contains an implementation of a Windows COFF object file streamer.
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "WinCOFFStreamer"
-
-#include "llvm/MC/MCObjectStreamer.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCSection.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCValue.h"
-#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAsmLayout.h"
+#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectStreamer.h"
+#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSectionCOFF.h"
-#include "llvm/MC/MCWin64EH.h"
-#include "llvm/MC/MCAsmBackend.h"
-
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbolCOFF.h"
+#include "llvm/MC/MCValue.h"
+#include "llvm/MC/MCWinCOFFStreamer.h"
#include "llvm/Support/COFF.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
-namespace {
-class WinCOFFStreamer : public MCObjectStreamer {
-public:
- MCSymbol const *CurSymbol;
-
- WinCOFFStreamer(MCContext &Context,
- MCAsmBackend &MAB,
- MCCodeEmitter &CE,
- raw_ostream &OS);
-
- void AddCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment, bool External);
-
- // MCStreamer interface
-
- virtual void InitSections();
- virtual void EmitLabel(MCSymbol *Symbol);
- virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
- virtual void EmitThumbFunc(MCSymbol *Func);
- virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
- virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
- virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
- virtual void BeginCOFFSymbolDef(MCSymbol const *Symbol);
- virtual void EmitCOFFSymbolStorageClass(int StorageClass);
- virtual void EmitCOFFSymbolType(int Type);
- virtual void EndCOFFSymbolDef();
- virtual void EmitCOFFSecRel32(MCSymbol const *Symbol);
- virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
- virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment);
- virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment);
- virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- unsigned Size,unsigned ByteAlignment);
- virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size, unsigned ByteAlignment);
- virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
- virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
- unsigned ValueSize, unsigned MaxBytesToEmit);
- virtual void EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit);
- virtual void EmitFileDirective(StringRef Filename);
- virtual void EmitInstruction(const MCInst &Instruction);
- virtual void EmitWin64EHHandlerData();
- virtual void FinishImpl();
-
-private:
- virtual void EmitInstToFragment(const MCInst &Inst) {
- llvm_unreachable("Not used by WinCOFF.");
- }
- virtual void EmitInstToData(const MCInst &Inst) {
- llvm_unreachable("Not used by WinCOFF.");
- }
+#define DEBUG_TYPE "WinCOFFStreamer"
- void SetSection(StringRef Section,
- unsigned Characteristics,
- SectionKind Kind) {
- SwitchSection(getContext().getCOFFSection(Section, Characteristics, Kind));
- }
+namespace llvm {
+MCWinCOFFStreamer::MCWinCOFFStreamer(MCContext &Context, MCAsmBackend &MAB,
+ MCCodeEmitter &CE, raw_pwrite_stream &OS)
+ : MCObjectStreamer(Context, MAB, OS, &CE), CurSymbol(nullptr) {}
- void SetSectionText() {
- SetSection(".text",
- COFF::IMAGE_SCN_CNT_CODE
- | COFF::IMAGE_SCN_MEM_EXECUTE
- | COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getText());
- EmitCodeAlignment(4, 0);
- }
+void MCWinCOFFStreamer::EmitInstToData(const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
+ MCDataFragment *DF = getOrCreateDataFragment();
- void SetSectionData() {
- SetSection(".data",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA
- | COFF::IMAGE_SCN_MEM_READ
- | COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getDataRel());
- EmitCodeAlignment(4, 0);
- }
+ SmallVector<MCFixup, 4> Fixups;
+ SmallString<256> Code;
+ raw_svector_ostream VecOS(Code);
+ getAssembler().getEmitter().encodeInstruction(Inst, VecOS, Fixups, STI);
- void SetSectionBSS() {
- SetSection(".bss",
- COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA
- | COFF::IMAGE_SCN_MEM_READ
- | COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getBSS());
- EmitCodeAlignment(4, 0);
+ // Add the fixups and data.
+ for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
+ Fixups[i].setOffset(Fixups[i].getOffset() + DF->getContents().size());
+ DF->getFixups().push_back(Fixups[i]);
}
-};
-} // end anonymous namespace.
-
-WinCOFFStreamer::WinCOFFStreamer(MCContext &Context,
- MCAsmBackend &MAB,
- MCCodeEmitter &CE,
- raw_ostream &OS)
- : MCObjectStreamer(Context, MAB, OS, &CE)
- , CurSymbol(NULL) {
+ DF->getContents().append(Code.begin(), Code.end());
}
-void WinCOFFStreamer::AddCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment, bool External) {
- assert(!Symbol->isInSection() && "Symbol must not already have a section!");
-
- std::string SectionName(".bss$linkonce");
- SectionName.append(Symbol->getName().begin(), Symbol->getName().end());
-
- MCSymbolData &SymbolData = getAssembler().getOrCreateSymbolData(*Symbol);
-
- unsigned Characteristics =
- COFF::IMAGE_SCN_LNK_COMDAT |
- COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE;
-
- int Selection = COFF::IMAGE_COMDAT_SELECT_LARGEST;
-
- const MCSection *Section = MCStreamer::getContext().getCOFFSection(
- SectionName, Characteristics, Selection, SectionKind::getBSS());
-
- MCSectionData &SectionData = getAssembler().getOrCreateSectionData(*Section);
-
- if (SectionData.getAlignment() < ByteAlignment)
- SectionData.setAlignment(ByteAlignment);
-
- SymbolData.setExternal(External);
+void MCWinCOFFStreamer::InitSections(bool NoExecStack) {
+ // FIXME: this is identical to the ELF one.
+ // This emulates the same behavior of GNU as. This makes it easier
+ // to compare the output as the major sections are in the same order.
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+ EmitCodeAlignment(4);
- Symbol->setSection(*Section);
+ SwitchSection(getContext().getObjectFileInfo()->getDataSection());
+ EmitCodeAlignment(4);
- if (ByteAlignment != 1)
- new MCAlignFragment(ByteAlignment, 0, 0, ByteAlignment, &SectionData);
-
- SymbolData.setFragment(new MCFillFragment(0, 0, Size, &SectionData));
-}
+ SwitchSection(getContext().getObjectFileInfo()->getBSSSection());
+ EmitCodeAlignment(4);
-// MCStreamer interface
-
-void WinCOFFStreamer::InitSections() {
- SetSectionText();
- SetSectionData();
- SetSectionBSS();
- SetSectionText();
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
}
-void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
+void MCWinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
MCObjectStreamer::EmitLabel(Symbol);
}
-void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
+void MCWinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::EmitThumbFunc(MCSymbol *Func) {
+void MCWinCOFFStreamer::EmitThumbFunc(MCSymbol *Func) {
llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
- assert((Symbol->isInSection()
- ? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
- // FIXME: This is all very ugly and depressing. What needs to happen here
- // depends on quite a few things that are all part of relaxation, which we
- // don't really even do.
-
- if (Value->getKind() != MCExpr::SymbolRef) {
- // TODO: This is exactly the same as MachOStreamer. Consider merging into
- // MCObjectStreamer.
- getAssembler().getOrCreateSymbolData(*Symbol);
- AddValueSymbols(Value);
- Symbol->setVariableValue(Value);
- } else {
- // FIXME: This is a horrible way to do this :(. This should really be
- // handled after we are done with the MC* objects and immediately before
- // writing out the object file when we know exactly what the symbol should
- // look like in the coff symbol table. I'm not doing that now because the
- // COFF object writer doesn't have a clearly defined separation between MC
- // data structures, the object writers data structures, and the raw, POD,
- // data structures that get written to disk.
-
- // Copy over the aliased data.
- MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
- const MCSymbolData &RealSD = getAssembler().getOrCreateSymbolData(
- dyn_cast<const MCSymbolRefExpr>(Value)->getSymbol());
-
- // FIXME: This is particularly nasty because it breaks as soon as any data
- // members of MCSymbolData change.
- SD.CommonAlign = RealSD.CommonAlign;
- SD.CommonSize = RealSD.CommonSize;
- SD.Flags = RealSD.Flags;
- SD.Fragment = RealSD.Fragment;
- SD.Index = RealSD.Index;
- SD.IsExternal = RealSD.IsExternal;
- SD.IsPrivateExtern = RealSD.IsPrivateExtern;
- SD.Offset = RealSD.Offset;
- SD.SymbolSize = RealSD.SymbolSize;
- }
-}
-
-void WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
- MCSymbolAttr Attribute) {
+bool MCWinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+ MCSymbolAttr Attribute) {
assert(Symbol && "Symbol must be non-null!");
- assert((Symbol->isInSection()
- ? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
+ assert((!Symbol->isInSection() ||
+ Symbol->getSection().getVariant() == MCSection::SV_COFF) &&
+ "Got non-COFF section in the COFF backend!");
+
+ getAssembler().registerSymbol(*Symbol);
+
switch (Attribute) {
+ default: return false;
case MCSA_WeakReference:
- case MCSA_Weak: {
- MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
- SD.modifyFlags(COFF::SF_WeakExternal, COFF::SF_WeakExternal);
- SD.setExternal(true);
- }
+ case MCSA_Weak:
+ cast<MCSymbolCOFF>(Symbol)->setIsWeakExternal();
+ Symbol->setExternal(true);
break;
-
case MCSA_Global:
- getAssembler().getOrCreateSymbolData(*Symbol).setExternal(true);
+ Symbol->setExternal(true);
break;
-
- default:
- llvm_unreachable("unsupported attribute");
}
+
+ return true;
}
-void WinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
+void MCWinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::BeginCOFFSymbolDef(MCSymbol const *Symbol) {
- assert((Symbol->isInSection()
- ? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
- assert(CurSymbol == NULL && "EndCOFFSymbolDef must be called between calls "
- "to BeginCOFFSymbolDef!");
+void MCWinCOFFStreamer::BeginCOFFSymbolDef(MCSymbol const *Symbol) {
+ assert((!Symbol->isInSection() ||
+ Symbol->getSection().getVariant() == MCSection::SV_COFF) &&
+ "Got non-COFF section in the COFF backend!");
+
+ if (CurSymbol)
+ FatalError("starting a new symbol definition without completing the "
+ "previous one");
CurSymbol = Symbol;
}
-void WinCOFFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {
- assert(CurSymbol != NULL && "BeginCOFFSymbolDef must be called first!");
- assert((StorageClass & ~0xFF) == 0 && "StorageClass must only have data in "
- "the first byte!");
+void MCWinCOFFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {
+ if (!CurSymbol)
+ FatalError("storage class specified outside of symbol definition");
+
+ if (StorageClass & ~COFF::SSC_Invalid)
+ FatalError("storage class value '" + Twine(StorageClass) +
+ "' out of range");
- getAssembler().getOrCreateSymbolData(*CurSymbol).modifyFlags(
- StorageClass << COFF::SF_ClassShift,
- COFF::SF_ClassMask);
+ getAssembler().registerSymbol(*CurSymbol);
+ cast<MCSymbolCOFF>(CurSymbol)->setClass((uint16_t)StorageClass);
}
-void WinCOFFStreamer::EmitCOFFSymbolType(int Type) {
- assert(CurSymbol != NULL && "BeginCOFFSymbolDef must be called first!");
- assert((Type & ~0xFFFF) == 0 && "Type must only have data in the first 2 "
- "bytes");
+void MCWinCOFFStreamer::EmitCOFFSymbolType(int Type) {
+ if (!CurSymbol)
+ FatalError("symbol type specified outside of a symbol definition");
- getAssembler().getOrCreateSymbolData(*CurSymbol).modifyFlags(
- Type << COFF::SF_TypeShift,
- COFF::SF_TypeMask);
+ if (Type & ~0xffff)
+ FatalError("type value '" + Twine(Type) + "' out of range");
+
+ getAssembler().registerSymbol(*CurSymbol);
+ cast<MCSymbolCOFF>(CurSymbol)->setType((uint16_t)Type);
}
-void WinCOFFStreamer::EndCOFFSymbolDef() {
- assert(CurSymbol != NULL && "BeginCOFFSymbolDef must be called first!");
- CurSymbol = NULL;
+void MCWinCOFFStreamer::EndCOFFSymbolDef() {
+ if (!CurSymbol)
+ FatalError("ending symbol definition without starting one");
+ CurSymbol = nullptr;
}
-void WinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol)
-{
- MCDataFragment *DF = getOrCreateDataFragment();
+void MCWinCOFFStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
+ // SafeSEH is a feature specific to 32-bit x86. It does not exist (and is
+ // unnecessary) on all platforms which use table-based exception dispatch.
+ if (getContext().getObjectFileInfo()->getTargetTriple().getArch() !=
+ Triple::x86)
+ return;
- DF->addFixup(MCFixup::Create(DF->getContents().size(),
- MCSymbolRefExpr::Create (Symbol, getContext ()),
- FK_SecRel_4));
- DF->getContents().resize(DF->getContents().size() + 4, 0);
-}
+ const MCSymbolCOFF *CSymbol = cast<MCSymbolCOFF>(Symbol);
+ if (CSymbol->isSafeSEH())
+ return;
-void WinCOFFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
- llvm_unreachable("not implemented");
-}
+ MCSection *SXData = getContext().getObjectFileInfo()->getSXDataSection();
+ getAssembler().registerSection(*SXData);
+ if (SXData->getAlignment() < 4)
+ SXData->setAlignment(4);
-void WinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment) {
- assert((Symbol->isInSection()
- ? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
- AddCommonSymbol(Symbol, Size, ByteAlignment, true);
-}
+ new MCSafeSEHFragment(Symbol, SXData);
-void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment) {
- assert((Symbol->isInSection()
- ? Symbol->getSection().getVariant() == MCSection::SV_COFF
- : true) && "Got non COFF section in the COFF backend!");
- AddCommonSymbol(Symbol, Size, ByteAlignment, false);
-}
+ getAssembler().registerSymbol(*Symbol);
+ CSymbol->setIsSafeSEH();
-void WinCOFFStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- unsigned Size,unsigned ByteAlignment) {
- llvm_unreachable("not implemented");
+ // The Microsoft linker requires that the symbol type of a handler be
+ // function. Go ahead and oblige it here.
+ CSymbol->setType(COFF::IMAGE_SYM_DTYPE_FUNCTION
+ << COFF::SCT_COMPLEX_TYPE_SHIFT);
}
-void WinCOFFStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size, unsigned ByteAlignment) {
- llvm_unreachable("not implemented");
+void MCWinCOFFStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+ const MCSymbolRefExpr *SRE = MCSymbolRefExpr::create(Symbol, getContext());
+ MCFixup Fixup = MCFixup::create(DF->getContents().size(), SRE, FK_SecRel_2);
+ DF->getFixups().push_back(Fixup);
+ DF->getContents().resize(DF->getContents().size() + 2, 0);
}
-void WinCOFFStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
- // TODO: This is copied exactly from the MachOStreamer. Consider merging into
- // MCObjectStreamer?
- getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end());
+void MCWinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+ const MCSymbolRefExpr *SRE = MCSymbolRefExpr::create(Symbol, getContext());
+ MCFixup Fixup = MCFixup::create(DF->getContents().size(), SRE, FK_SecRel_4);
+ DF->getFixups().push_back(Fixup);
+ DF->getContents().resize(DF->getContents().size() + 4, 0);
}
-void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
- int64_t Value,
- unsigned ValueSize,
- unsigned MaxBytesToEmit) {
- // TODO: This is copied exactly from the MachOStreamer. Consider merging into
- // MCObjectStreamer?
- if (MaxBytesToEmit == 0)
- MaxBytesToEmit = ByteAlignment;
- new MCAlignFragment(ByteAlignment, Value, ValueSize, MaxBytesToEmit,
- getCurrentSectionData());
-
- // Update the maximum alignment on the current section if necessary.
- if (ByteAlignment > getCurrentSectionData()->getAlignment())
- getCurrentSectionData()->setAlignment(ByteAlignment);
-}
+void MCWinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {
+ assert((!Symbol->isInSection() ||
+ Symbol->getSection().getVariant() == MCSection::SV_COFF) &&
+ "Got non-COFF section in the COFF backend!");
-void WinCOFFStreamer::EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit) {
- // TODO: This is copied exactly from the MachOStreamer. Consider merging into
- // MCObjectStreamer?
- if (MaxBytesToEmit == 0)
- MaxBytesToEmit = ByteAlignment;
- MCAlignFragment *F = new MCAlignFragment(ByteAlignment, 0, 1, MaxBytesToEmit,
- getCurrentSectionData());
- F->setEmitNops(true);
-
- // Update the maximum alignment on the current section if necessary.
- if (ByteAlignment > getCurrentSectionData()->getAlignment())
- getCurrentSectionData()->setAlignment(ByteAlignment);
-}
+ const Triple &T = getContext().getObjectFileInfo()->getTargetTriple();
+ if (T.isKnownWindowsMSVCEnvironment()) {
+ if (ByteAlignment > 32)
+ report_fatal_error("alignment is limited to 32-bytes");
+
+ // Round size up to alignment so that we will honor the alignment request.
+ Size = std::max(Size, static_cast<uint64_t>(ByteAlignment));
+ }
+
+ AssignSection(Symbol, nullptr);
-void WinCOFFStreamer::EmitFileDirective(StringRef Filename) {
- // Ignore for now, linkers don't care, and proper debug
- // info will be a much large effort.
+ getAssembler().registerSymbol(*Symbol);
+ Symbol->setExternal(true);
+ Symbol->setCommon(Size, ByteAlignment);
+
+ if (!T.isKnownWindowsMSVCEnvironment() && ByteAlignment > 1) {
+ SmallString<128> Directive;
+ raw_svector_ostream OS(Directive);
+ const MCObjectFileInfo *MFI = getContext().getObjectFileInfo();
+
+ OS << " -aligncomm:\"" << Symbol->getName() << "\","
+ << Log2_32_Ceil(ByteAlignment);
+
+ PushSection();
+ SwitchSection(MFI->getDrectveSection());
+ EmitBytes(Directive);
+ PopSection();
+ }
}
-void WinCOFFStreamer::EmitInstruction(const MCInst &Instruction) {
- for (unsigned i = 0, e = Instruction.getNumOperands(); i != e; ++i)
- if (Instruction.getOperand(i).isExpr())
- AddValueSymbols(Instruction.getOperand(i).getExpr());
+void MCWinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {
+ assert(!Symbol->isInSection() && "Symbol must not already have a section!");
+
+ MCSection *Section = getContext().getObjectFileInfo()->getBSSSection();
+ getAssembler().registerSection(*Section);
+ if (Section->getAlignment() < ByteAlignment)
+ Section->setAlignment(ByteAlignment);
- getCurrentSectionData()->setHasInstructions(true);
+ getAssembler().registerSymbol(*Symbol);
+ Symbol->setExternal(false);
+
+ AssignSection(Symbol, Section);
+
+ if (ByteAlignment != 1)
+ new MCAlignFragment(ByteAlignment, /*Value=*/0, /*ValueSize=*/0,
+ ByteAlignment, Section);
+
+ MCFillFragment *Fragment = new MCFillFragment(
+ /*Value=*/0, /*ValueSize=*/0, Size, Section);
+ Symbol->setFragment(Fragment);
+}
- MCInstFragment *Fragment =
- new MCInstFragment(Instruction, getCurrentSectionData());
+void MCWinCOFFStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment) {
+ llvm_unreachable("not implemented");
+}
- raw_svector_ostream VecOS(Fragment->getCode());
+void MCWinCOFFStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment) {
+ llvm_unreachable("not implemented");
+}
- getAssembler().getEmitter().EncodeInstruction(Instruction, VecOS,
- Fragment->getFixups());
+void MCWinCOFFStreamer::EmitFileDirective(StringRef Filename) {
+ getAssembler().addFileName(Filename);
}
-void WinCOFFStreamer::EmitWin64EHHandlerData() {
- MCStreamer::EmitWin64EHHandlerData();
+// TODO: Implement this if you want to emit .comment section in COFF obj files.
+void MCWinCOFFStreamer::EmitIdent(StringRef IdentString) {
+ llvm_unreachable("not implemented");
+}
- // We have to emit the unwind info now, because this directive
- // actually switches to the .xdata section!
- MCWin64EHUnwindEmitter::EmitUnwindInfo(*this, getCurrentW64UnwindInfo());
+void MCWinCOFFStreamer::EmitWinEHHandlerData() {
+ llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::FinishImpl() {
- EmitW64Tables();
+void MCWinCOFFStreamer::FinishImpl() {
MCObjectStreamer::FinishImpl();
}
-namespace llvm
-{
- MCStreamer *createWinCOFFStreamer(MCContext &Context,
- MCAsmBackend &MAB,
- MCCodeEmitter &CE,
- raw_ostream &OS,
- bool RelaxAll) {
- WinCOFFStreamer *S = new WinCOFFStreamer(Context, MAB, CE, OS);
- S->getAssembler().setRelaxAll(RelaxAll);
- return S;
- }
+LLVM_ATTRIBUTE_NORETURN
+void MCWinCOFFStreamer::FatalError(const Twine &Msg) const {
+ getContext().reportFatalError(SMLoc(), Msg);
}
+}
+
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