#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/MCAsmLayout.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/Target/TargetRegistry.h"
#include "llvm/Target/TargetAsmBackend.h"
+#include "llvm/ADT/StringMap.h"
+
#include "llvm/Support/COFF.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
-#define dbg_notimpl(x) \
- do { dbgs() << "not implemented, " << __FUNCTION__ << " (" << x << ")"; \
- abort(); } while (false);
-
namespace {
class WinCOFFStreamer : public MCObjectStreamer {
public:
+ MCSymbol const *CurSymbol;
+
WinCOFFStreamer(MCContext &Context,
TargetAsmBackend &TAB,
MCCodeEmitter &CE,
raw_ostream &OS);
+ void AddCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment, bool External);
+
// MCStreamer interface
virtual void EmitLabel(MCSymbol *Symbol);
virtual void EndCOFFSymbolDef();
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment);
+ unsigned ByteAlignment);
virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- unsigned Size,unsigned ByteAlignment);
+ unsigned Size,unsigned ByteAlignment);
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size, unsigned ByteAlignment);
+ uint64_t Size, unsigned ByteAlignment);
virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
- virtual void EmitValue(const MCExpr *Value, unsigned Size,
+ 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);
+ unsigned ValueSize, unsigned MaxBytesToEmit);
virtual void EmitCodeAlignment(unsigned ByteAlignment,
unsigned MaxBytesToEmit);
virtual void EmitValueToOffset(const MCExpr *Offset, unsigned char Value);
TargetAsmBackend &TAB,
MCCodeEmitter &CE,
raw_ostream &OS)
- : MCObjectStreamer(Context, TAB, OS, &CE) {
+ : MCObjectStreamer(Context, TAB, 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!");
+
+ 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);
+
+ Symbol->setSection(*Section);
+
+ if (ByteAlignment != 1)
+ new MCAlignFragment(ByteAlignment, 0, 0, ByteAlignment, &SectionData);
+
+ SymbolData.setFragment(new MCFillFragment(0, 0, Size, &SectionData));
}
// MCStreamer interface
void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
+ // TODO: This is copied almost exactly from the MachOStreamer. Consider
+ // merging into MCObjectStreamer?
+ assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
+ assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+ assert(CurSection && "Cannot emit before setting section!");
+
+ Symbol->setSection(*CurSection);
+
+ MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
+
+ // FIXME: This is wasteful, we don't necessarily need to create a data
+ // fragment. Instead, we should mark the symbol as pointing into the data
+ // fragment if it exists, otherwise we should just queue the label and set its
+ // fragment pointer when we emit the next fragment.
+ MCDataFragment *DF = getOrCreateDataFragment();
+
+ assert(!SD.getFragment() && "Unexpected fragment on symbol data!");
+ SD.setFragment(DF);
+ SD.setOffset(DF->getContents().size());
}
void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
- dbg_notimpl("Flag = " << Flag);
+ llvm_unreachable("not implemented");
}
void WinCOFFStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ // TODO: This is exactly the same as MachOStreamer. Consider merging into
+ // MCObjectStreamer.
+ getAssembler().getOrCreateSymbolData(*Symbol);
+ AddValueSymbols(Value);
+ Symbol->setVariableValue(Value);
}
void WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCSymbolAttr Attribute) {
+ switch (Attribute) {
+ case MCSA_WeakReference:
+ getAssembler().getOrCreateSymbolData(*Symbol).modifyFlags(
+ COFF::SF_WeakReference,
+ COFF::SF_WeakReference);
+ break;
+
+ case MCSA_Global:
+ getAssembler().getOrCreateSymbolData(*Symbol).setExternal(true);
+ break;
+
+ default:
+ llvm_unreachable("unsupported attribute");
+ break;
+ }
}
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(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::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) {
+ AddCommonSymbol(Symbol, Size, ByteAlignment, true);
}
void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
+ AddCommonSymbol(Symbol, Size, 1, 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);
+ unsigned 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);
+ llvm_unreachable("not implemented");
}
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 WinCOFFStreamer::EmitValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace) {
+ unsigned AddrSpace) {
+ assert(AddrSpace == 0 && "Address space must be 0!");
+
+ // TODO: This is copied exactly from the MachOStreamer. Consider merging into
+ // MCObjectStreamer?
+ MCDataFragment *DF = getOrCreateDataFragment();
+
+ // Avoid fixups when possible.
+ int64_t AbsValue;
+ if (AddValueSymbols(Value)->EvaluateAsAbsolute(AbsValue)) {
+ // FIXME: Endianness assumption.
+ for (unsigned i = 0; i != Size; ++i)
+ DF->getContents().push_back(uint8_t(AbsValue >> (i * 8)));
+ } else {
+ DF->addFixup(MCFixup::Create(DF->getContents().size(),
+ AddValueSymbols(Value),
+ MCFixup::getKindForSize(Size)));
+ DF->getContents().resize(DF->getContents().size() + Size, 0);
+ }
}
void WinCOFFStreamer::EmitGPRel32Value(const MCExpr *Value) {
- dbg_notimpl("Value = '" << *Value);
+ llvm_unreachable("not implemented");
}
void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
- int64_t Value,
- unsigned ValueSize,
- unsigned MaxBytesToEmit) {
+ 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 WinCOFFStreamer::EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit = 0) {
+ 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);
}
void WinCOFFStreamer::EmitValueToOffset(const MCExpr *Offset,
- unsigned char Value = 0) {
- dbg_notimpl("Offset = '" << *Offset << "', Value = " << Value);
+ unsigned char Value) {
+ llvm_unreachable("not implemented");
}
void WinCOFFStreamer::EmitFileDirective(StringRef Filename) {
}
void WinCOFFStreamer::EmitDwarfFileDirective(unsigned FileNo,
- StringRef Filename) {
- dbg_notimpl("FileNo = " << FileNo << ", Filename = '" << Filename << "'");
+ StringRef Filename) {
+ llvm_unreachable("not implemented");
}
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());
+
+ getCurrentSectionData()->setHasInstructions(true);
+
+ MCInstFragment *Fragment =
+ new MCInstFragment(Instruction, getCurrentSectionData());
+
+ raw_svector_ostream VecOS(Fragment->getCode());
+
+ getAssembler().getEmitter().EncodeInstruction(Instruction, VecOS,
+ Fragment->getFixups());
}
void WinCOFFStreamer::Finish() {
MCStreamer *createWinCOFFStreamer(MCContext &Context,
TargetAsmBackend &TAB,
MCCodeEmitter &CE,
- raw_ostream &OS) {
- return new WinCOFFStreamer(Context, TAB, CE, OS);
+ raw_ostream &OS,
+ bool RelaxAll) {
+ WinCOFFStreamer *S = new WinCOFFStreamer(Context, TAB, CE, OS);
+ S->getAssembler().setRelaxAll(RelaxAll);
+ return S;
}
}
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