#define DEBUG_TYPE "WinCOFFStreamer"
-#include "llvm/MC/MCObjectStreamer.h"
+#include "llvm/MC/MCStreamer.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/MCSection.h"
-#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectStreamer.h"
+#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSectionCOFF.h"
-#include "llvm/Target/TargetAsmBackend.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCValue.h"
+#include "llvm/MC/MCWin64EH.h"
#include "llvm/Support/COFF.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
-using namespace llvm;
-#define dbg_notimpl(x) \
- do { dbgs() << "not implemented, " << __FUNCTION__ << " (" << x << ")"; \
- abort(); } while (false);
+using namespace llvm;
namespace {
class WinCOFFStreamer : public MCObjectStreamer {
public:
+ MCSymbol const *CurSymbol;
+
WinCOFFStreamer(MCContext &Context,
- TargetAsmBackend &TAB,
+ MCAsmBackend &MAB,
MCCodeEmitter &CE,
raw_ostream &OS);
+ void AddCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment, bool External);
+
// MCStreamer interface
+ virtual void InitSections(bool Force);
virtual void EmitLabel(MCSymbol *Symbol);
+ virtual void EmitDebugLabel(MCSymbol *Symbol);
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
- virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
- virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
+ virtual void EmitThumbFunc(MCSymbol *Func);
+ virtual bool 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 EmitCOFFSectionIndex(MCSymbol const *Symbol);
+ 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 EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment);
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- unsigned Size,unsigned ByteAlignment);
+ uint64_t 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 EmitValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace);
- virtual void EmitGPRel32Value(const MCExpr *Value);
- virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
- unsigned ValueSize, unsigned MaxBytesToEmit);
- virtual void EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit);
- virtual void EmitValueToOffset(const MCExpr *Offset, unsigned char Value);
+ uint64_t Size, unsigned ByteAlignment);
virtual void EmitFileDirective(StringRef Filename);
- virtual void EmitDwarfFileDirective(unsigned FileNo,StringRef Filename);
- virtual void EmitInstruction(const MCInst &Instruction);
- virtual void Finish();
+ virtual void EmitIdent(StringRef IdentString);
+ virtual void EmitWin64EHHandlerData();
+ virtual void FinishImpl();
+
+private:
+ virtual void EmitInstToData(const MCInst &Inst) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+
+ SmallVector<MCFixup, 4> Fixups;
+ SmallString<256> Code;
+ raw_svector_ostream VecOS(Code);
+ getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups);
+ VecOS.flush();
+
+ // 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]);
+ }
+ DF->getContents().append(Code.begin(), Code.end());
+ }
};
} // end anonymous namespace.
-WinCOFFStreamer::WinCOFFStreamer(MCContext &Context,
- TargetAsmBackend &TAB,
- MCCodeEmitter &CE,
- raw_ostream &OS)
- : MCObjectStreamer(Context, TAB, OS, &CE) {
+WinCOFFStreamer::WinCOFFStreamer(MCContext &Context, MCAsmBackend &MAB,
+ MCCodeEmitter &CE, raw_ostream &OS)
+ : MCObjectStreamer(Context, 0, MAB, OS, &CE), CurSymbol(NULL) {}
+
+void WinCOFFStreamer::AddCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment, bool External) {
+ assert(!Symbol->isInSection() && "Symbol must not already have a section!");
+
+ const MCSection *Section = getContext().getObjectFileInfo()->getBSSSection();
+ MCSectionData &SectionData = getAssembler().getOrCreateSectionData(*Section);
+ if (SectionData.getAlignment() < ByteAlignment)
+ SectionData.setAlignment(ByteAlignment);
+
+ MCSymbolData &SymbolData = getAssembler().getOrCreateSymbolData(*Symbol);
+ SymbolData.setExternal(External);
+
+ AssignSection(Symbol, Section);
+
+ if (ByteAlignment != 1)
+ new MCAlignFragment(ByteAlignment, 0, 0, ByteAlignment, &SectionData);
+
+ SymbolData.setFragment(new MCFillFragment(0, 0, Size, &SectionData));
}
// MCStreamer interface
+void WinCOFFStreamer::InitSections(bool Force) {
+ // 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, 0);
+
+ SwitchSection(getContext().getObjectFileInfo()->getDataSection());
+ EmitCodeAlignment(4, 0);
+
+ SwitchSection(getContext().getObjectFileInfo()->getBSSSection());
+ EmitCodeAlignment(4, 0);
+
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+}
+
void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
+ assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
+ MCObjectStreamer::EmitLabel(Symbol);
}
+void WinCOFFStreamer::EmitDebugLabel(MCSymbol *Symbol) {
+ EmitLabel(Symbol);
+}
void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
- dbg_notimpl("Flag = " << Flag);
+ llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+void WinCOFFStreamer::EmitThumbFunc(MCSymbol *Func) {
+ llvm_unreachable("not implemented");
}
-void WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+bool WinCOFFStreamer::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!");
+ switch (Attribute) {
+ case MCSA_WeakReference:
+ case MCSA_Weak: {
+ MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
+ SD.modifyFlags(COFF::SF_WeakExternal, COFF::SF_WeakExternal);
+ SD.setExternal(true);
+ }
+ break;
+
+ case MCSA_Global:
+ getAssembler().getOrCreateSymbolData(*Symbol).setExternal(true);
+ break;
+
+ default:
+ return false;
+ }
+
+ return true;
}
void WinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
- dbg_notimpl("Symbol = " << Symbol->getName() << ", DescValue = "<< 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!");
+ 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!");
+
+ getAssembler().getOrCreateSymbolData(*CurSymbol).modifyFlags(
+ StorageClass << COFF::SF_ClassShift,
+ COFF::SF_ClassMask);
}
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");
+
+ getAssembler().getOrCreateSymbolData(*CurSymbol).modifyFlags(
+ Type << COFF::SF_TypeShift,
+ COFF::SF_TypeMask);
}
void WinCOFFStreamer::EndCOFFSymbolDef() {
+ assert(CurSymbol != NULL && "BeginCOFFSymbolDef must be called first!");
+ CurSymbol = NULL;
+}
+
+void WinCOFFStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+ DF->getFixups().push_back(MCFixup::Create(
+ DF->getContents().size(), MCSymbolRefExpr::Create(Symbol, getContext()),
+ FK_SecRel_2));
+ DF->getContents().resize(DF->getContents().size() + 4, 0);
+}
+
+void WinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+ MCDataFragment *DF = getOrCreateDataFragment();
+ DF->getFixups().push_back(MCFixup::Create(
+ DF->getContents().size(), MCSymbolRefExpr::Create(Symbol, getContext()),
+ FK_SecRel_4));
+ DF->getContents().resize(DF->getContents().size() + 4, 0);
}
void WinCOFFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
- dbg_notimpl("Symbol = " << Symbol->getName() << ", Value = " << *Value);
+ llvm_unreachable("not implemented");
}
void WinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment) {
+ 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);
}
-void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
+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);
}
void WinCOFFStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- unsigned Size,unsigned ByteAlignment) {
- MCSectionCOFF const *SectionCOFF =
- static_cast<MCSectionCOFF const *>(Section);
-
- dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " <<
- Symbol->getName() << ", Size = " << Size << ", ByteAlignment = "
- << ByteAlignment);
+ uint64_t Size,unsigned ByteAlignment) {
+ llvm_unreachable("not implemented");
}
void WinCOFFStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
uint64_t Size, unsigned ByteAlignment) {
- MCSectionCOFF const *SectionCOFF =
- static_cast<MCSectionCOFF const *>(Section);
-
- dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " <<
- Symbol->getName() << ", Size = " << Size << ", ByteAlignment = "
- << ByteAlignment);
-}
-
-void WinCOFFStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
-}
-
-void WinCOFFStreamer::EmitValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace) {
-}
-
-void WinCOFFStreamer::EmitGPRel32Value(const MCExpr *Value) {
- dbg_notimpl("Value = '" << *Value);
-}
-
-void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
- int64_t Value,
- unsigned ValueSize,
- unsigned MaxBytesToEmit) {
-}
-
-void WinCOFFStreamer::EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit = 0) {
-}
-
-void WinCOFFStreamer::EmitValueToOffset(const MCExpr *Offset,
- unsigned char Value = 0) {
- dbg_notimpl("Offset = '" << *Offset << "', Value = " << Value);
+ llvm_unreachable("not implemented");
}
void WinCOFFStreamer::EmitFileDirective(StringRef Filename) {
// info will be a much large effort.
}
-void WinCOFFStreamer::EmitDwarfFileDirective(unsigned FileNo,
- StringRef Filename) {
- dbg_notimpl("FileNo = " << FileNo << ", Filename = '" << Filename << "'");
+// TODO: Implement this if you want to emit .comment section in COFF obj files.
+void WinCOFFStreamer::EmitIdent(StringRef IdentString) {
+ llvm_unreachable("unsupported directive");
}
-void WinCOFFStreamer::EmitInstruction(const MCInst &Instruction) {
+void WinCOFFStreamer::EmitWin64EHHandlerData() {
+ MCStreamer::EmitWin64EHHandlerData();
+
+ // We have to emit the unwind info now, because this directive
+ // actually switches to the .xdata section!
+ MCWin64EHUnwindEmitter::EmitUnwindInfo(*this, getCurrentW64UnwindInfo());
}
-void WinCOFFStreamer::Finish() {
- MCObjectStreamer::Finish();
+void WinCOFFStreamer::FinishImpl() {
+ EmitFrames(NULL, true);
+ EmitW64Tables();
+ MCObjectStreamer::FinishImpl();
}
namespace llvm
{
MCStreamer *createWinCOFFStreamer(MCContext &Context,
- TargetAsmBackend &TAB,
+ MCAsmBackend &MAB,
MCCodeEmitter &CE,
- raw_ostream &OS) {
- return new WinCOFFStreamer(Context, TAB, CE, OS);
+ raw_ostream &OS,
+ bool RelaxAll) {
+ WinCOFFStreamer *S = new WinCOFFStreamer(Context, MAB, CE, OS);
+ S->getAssembler().setRelaxAll(RelaxAll);
+ return S;
}
}
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