: MCStreamer(Context),
Assembler(new MCAssembler(Context, TAB, *Emitter_,
*TAB.createObjectWriter(OS), OS)),
- CurSectionData(0) {}
+ CurSectionData(nullptr), EmitEHFrame(true), EmitDebugFrame(false) {}
MCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB,
raw_ostream &OS, MCCodeEmitter *Emitter_,
MCAssembler *_Assembler)
- : MCStreamer(Context), Assembler(_Assembler), CurSectionData(0) {}
+ : MCStreamer(Context), Assembler(_Assembler), CurSectionData(nullptr),
+ EmitEHFrame(true), EmitDebugFrame(false) {}
MCObjectStreamer::~MCObjectStreamer() {
delete &Assembler->getBackend();
void MCObjectStreamer::reset() {
if (Assembler)
Assembler->reset();
- CurSectionData = 0;
+ CurSectionData = nullptr;
CurInsertionPoint = MCSectionData::iterator();
+ EmitEHFrame = true;
+ EmitDebugFrame = false;
MCStreamer::reset();
}
+void MCObjectStreamer::EmitFrames(MCAsmBackend *MAB) {
+ if (!getNumFrameInfos())
+ return;
+
+ if (EmitEHFrame)
+ MCDwarfFrameEmitter::Emit(*this, MAB, true);
+
+ if (EmitDebugFrame)
+ MCDwarfFrameEmitter::Emit(*this, MAB, false);
+}
+
MCFragment *MCObjectStreamer::getCurrentFragment() const {
assert(getCurrentSectionData() && "No current section!");
if (CurInsertionPoint != getCurrentSectionData()->getFragmentList().begin())
return std::prev(CurInsertionPoint);
- return 0;
+ return nullptr;
}
MCDataFragment *MCObjectStreamer::getOrCreateDataFragment() const {
return F;
}
-const MCExpr *MCObjectStreamer::AddValueSymbols(const MCExpr *Value) {
- switch (Value->getKind()) {
- case MCExpr::Target:
- cast<MCTargetExpr>(Value)->AddValueSymbols(Assembler);
- break;
-
- case MCExpr::Constant:
- break;
-
- case MCExpr::Binary: {
- const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
- AddValueSymbols(BE->getLHS());
- AddValueSymbols(BE->getRHS());
- break;
- }
-
- case MCExpr::SymbolRef:
- Assembler->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
- break;
-
- case MCExpr::Unary:
- AddValueSymbols(cast<MCUnaryExpr>(Value)->getSubExpr());
- break;
- }
+void MCObjectStreamer::visitUsedSymbol(const MCSymbol &Sym) {
+ Assembler->getOrCreateSymbolData(Sym);
+}
- return Value;
+void MCObjectStreamer::EmitCFISections(bool EH, bool Debug) {
+ MCStreamer::EmitCFISections(EH, Debug);
+ EmitEHFrame = EH;
+ EmitDebugFrame = Debug;
}
-void MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size) {
+void MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) {
+ MCStreamer::EmitValueImpl(Value, Size, Loc);
MCDataFragment *DF = getOrCreateDataFragment();
MCLineEntry::Make(this, getCurrentSection().first);
// Avoid fixups when possible.
int64_t AbsValue;
- if (AddValueSymbols(Value)->EvaluateAsAbsolute(AbsValue, getAssembler())) {
+ if (Value->EvaluateAsAbsolute(AbsValue, getAssembler())) {
EmitIntValue(AbsValue, Size);
return;
}
DF->getFixups().push_back(
MCFixup::Create(DF->getContents().size(), Value,
- MCFixup::getKindForSize(Size, false)));
+ MCFixup::getKindForSize(Size, false), Loc));
DF->getContents().resize(DF->getContents().size() + Size, 0);
}
void MCObjectStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
- RecordProcStart(Frame);
+ // We need to create a local symbol to avoid relocations.
+ Frame.Begin = getContext().CreateTempSymbol();
+ EmitLabel(Frame.Begin);
}
void MCObjectStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
- RecordProcEnd(Frame);
+ Frame.End = getContext().CreateTempSymbol();
+ EmitLabel(Frame.End);
}
void MCObjectStreamer::EmitLabel(MCSymbol *Symbol) {
SD.setOffset(F->getContents().size());
}
-void MCObjectStreamer::EmitDebugLabel(MCSymbol *Symbol) {
- EmitLabel(Symbol);
-}
-
void MCObjectStreamer::EmitULEB128Value(const MCExpr *Value) {
int64_t IntValue;
if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) {
EmitULEB128IntValue(IntValue);
return;
}
- Value = ForceExpAbs(Value);
insert(new MCLEBFragment(*Value, false));
}
EmitSLEB128IntValue(IntValue);
return;
}
- Value = ForceExpAbs(Value);
insert(new MCLEBFragment(*Value, true));
}
void MCObjectStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
getAssembler().getOrCreateSymbolData(*Symbol);
- Symbol->setVariableValue(AddValueSymbols(Value));
+ MCStreamer::EmitAssignment(Symbol, Value);
}
-void MCObjectStreamer::EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) {
- // Scan for values.
- for (unsigned i = Inst.getNumOperands(); i--; )
- if (Inst.getOperand(i).isExpr())
- AddValueSymbols(Inst.getOperand(i).getExpr());
+void MCObjectStreamer::EmitInstruction(const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
+ MCStreamer::EmitInstruction(Inst, STI);
MCSectionData *SD = getCurrentSectionData();
SD->setHasInstructions(true);
Isa, Discriminator, FileName);
}
+static const MCExpr *buildSymbolDiff(MCObjectStreamer &OS, const MCSymbol *A,
+ const MCSymbol *B) {
+ MCContext &Context = OS.getContext();
+ MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+ const MCExpr *ARef = MCSymbolRefExpr::Create(A, Variant, Context);
+ const MCExpr *BRef = MCSymbolRefExpr::Create(B, Variant, Context);
+ const MCExpr *AddrDelta =
+ MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
+ return AddrDelta;
+}
+
+static void emitDwarfSetLineAddr(MCObjectStreamer &OS, int64_t LineDelta,
+ const MCSymbol *Label, int PointerSize) {
+ // emit the sequence to set the address
+ OS.EmitIntValue(dwarf::DW_LNS_extended_op, 1);
+ OS.EmitULEB128IntValue(PointerSize + 1);
+ OS.EmitIntValue(dwarf::DW_LNE_set_address, 1);
+ OS.EmitSymbolValue(Label, PointerSize);
+
+ // emit the sequence for the LineDelta (from 1) and a zero address delta.
+ MCDwarfLineAddr::Emit(&OS, LineDelta, 0);
+}
+
void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
const MCSymbol *LastLabel,
const MCSymbol *Label,
unsigned PointerSize) {
if (!LastLabel) {
- EmitDwarfSetLineAddr(LineDelta, Label, PointerSize);
+ emitDwarfSetLineAddr(*this, LineDelta, Label, PointerSize);
return;
}
- const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+ const MCExpr *AddrDelta = buildSymbolDiff(*this, Label, LastLabel);
int64_t Res;
if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
MCDwarfLineAddr::Emit(this, LineDelta, Res);
return;
}
- AddrDelta = ForceExpAbs(AddrDelta);
insert(new MCDwarfLineAddrFragment(LineDelta, *AddrDelta));
}
void MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
const MCSymbol *Label) {
- const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+ const MCExpr *AddrDelta = buildSymbolDiff(*this, Label, LastLabel);
int64_t Res;
if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res);
return;
}
- AddrDelta = ForceExpAbs(AddrDelta);
insert(new MCDwarfCallFrameFragment(*AddrDelta));
}
}
void MCObjectStreamer::FinishImpl() {
- // Dump out the dwarf file & directory tables and line tables.
- const MCSymbol *LineSectionSymbol = NULL;
- if (getContext().hasMCLineSections())
- LineSectionSymbol = MCDwarfLineTable::Emit(this);
-
// If we are generating dwarf for assembly source files dump out the sections.
if (getContext().getGenDwarfForAssembly())
- MCGenDwarfInfo::Emit(this, LineSectionSymbol);
+ MCGenDwarfInfo::Emit(this);
+
+ // Dump out the dwarf file & directory tables and line tables.
+ MCDwarfLineTable::Emit(this);
getAssembler().Finish();
}
projects / oota-llvm.git / blobdiff