// 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 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);
virtual void EmitFileDirective(StringRef Filename);
- virtual void EmitDwarfFileDirective(unsigned FileNo,StringRef Filename);
virtual void EmitInstruction(const MCInst &Instruction);
virtual void Finish();
+
+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.");
+ }
+
+ void SetSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind) {
+ SwitchSection(getContext().getCOFFSection(Section, Characteristics, Kind));
+ }
+
+ 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 SetSectionData() {
+ SetSection(".data",
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA
+ | COFF::IMAGE_SCN_MEM_READ
+ | COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
+ EmitCodeAlignment(4, 0);
+ }
+
+ 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);
+ }
+
};
} // end anonymous namespace.
// MCStreamer interface
+void WinCOFFStreamer::InitSections() {
+ SetSectionText();
+ SetSectionData();
+ SetSectionBSS();
+ SetSectionText();
+}
+
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 *F = getOrCreateDataFragment();
- assert(!SD.getFragment() && "Unexpected fragment on symbol data!");
- SD.setFragment(F);
- SD.setOffset(F->getContents().size());
+ MCObjectStreamer::EmitLabel(Symbol);
}
void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
llvm_unreachable("not implemented");
}
+void WinCOFFStreamer::EmitThumbFunc(MCSymbol *Func) {
+ 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);
+ 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) {
+ 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:
- getAssembler().getOrCreateSymbolData(*Symbol).modifyFlags(
- COFF::SF_WeakReference,
- COFF::SF_WeakReference);
+ case MCSA_Weak: {
+ MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
+ SD.modifyFlags(COFF::SF_WeakExternal, COFF::SF_WeakExternal);
+ SD.setExternal(true);
+ }
break;
case MCSA_Global:
}
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::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);
}
void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
+ assert((Symbol->isInSection()
+ ? Symbol->getSection().getVariant() == MCSection::SV_COFF
+ : true) && "Got non COFF section in the COFF backend!");
AddCommonSymbol(Symbol, Size, 1, false);
}
getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end());
}
-void WinCOFFStreamer::EmitValue(const MCExpr *Value, unsigned Size,
- 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) {
- llvm_unreachable("not implemented");
-}
-
void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
int64_t Value,
unsigned ValueSize,
getCurrentSectionData()->setAlignment(ByteAlignment);
}
-void WinCOFFStreamer::EmitValueToOffset(const MCExpr *Offset,
- unsigned char Value) {
- llvm_unreachable("not implemented");
-}
-
void WinCOFFStreamer::EmitFileDirective(StringRef Filename) {
// Ignore for now, linkers don't care, and proper debug
// info will be a much large effort.
}
-void WinCOFFStreamer::EmitDwarfFileDirective(unsigned FileNo,
- 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())
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