using namespace llvm;
MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
- EmitDebugFrame(false) {
+ EmitDebugFrame(false),
+ CurrentW64UnwindInfo(0),
+ LastSymbol(0) {
const MCSection *section = NULL;
SectionStack.push_back(std::make_pair(section, section));
}
MCStreamer::~MCStreamer() {
+ for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
+ delete W64UnwindInfos[i];
}
const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
return AddrDelta;
}
-const MCExpr *MCStreamer::ForceExpAbs(MCStreamer *Streamer,
- MCContext &Context, const MCExpr* Expr) {
- if (Context.getAsmInfo().hasAggressiveSymbolFolding())
- return Expr;
+const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
+ if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
+ isa<MCSymbolRefExpr>(Expr))
+ return Expr;
- MCSymbol *ABS = Context.CreateTempSymbol();
- Streamer->EmitAssignment(ABS, Expr);
- return MCSymbolRefExpr::Create(ABS, Context);
+ MCSymbol *ABS = Context.CreateTempSymbol();
+ EmitAssignment(ABS, Expr);
+ return MCSymbolRefExpr::Create(ABS, Context);
}
raw_ostream &MCStreamer::GetCommentOS() {
assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
"Invalid size");
char buf[8];
- // FIXME: Endianness assumption.
- for (unsigned i = 0; i != Size; ++i)
- buf[i] = uint8_t(Value >> (i * 8));
+ const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
+ for (unsigned i = 0; i != Size; ++i) {
+ unsigned index = isLittleEndian ? i : (Size - i - 1);
+ buf[i] = uint8_t(Value >> (index * 8));
+ }
EmitBytes(StringRef(buf, Size), AddrSpace);
}
void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
unsigned AddrSpace) {
- if (getContext().getAsmInfo().hasAggressiveSymbolFolding()) {
- EmitValue(Value, Size, AddrSpace);
- return;
- }
- MCSymbol *ABS = getContext().CreateTempSymbol();
- EmitAssignment(ABS, Value);
- EmitSymbolValue(ABS, Size, AddrSpace);
+ const MCExpr *ABS = ForceExpAbs(Value);
+ EmitValue(ABS, Size, AddrSpace);
}
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
assert(getCurrentSection() && "Cannot emit before setting section!");
Symbol->setSection(*getCurrentSection());
+ LastSymbol = Symbol;
+}
- StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
- if (!Symbol->getName().startswith(Prefix))
- LastNonPrivate = Symbol;
+void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
}
void MCStreamer::EmitCFISections(bool EH, bool Debug) {
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a frame before finishing the previous one!");
+
MCDwarfFrameInfo Frame;
- Frame.Begin = getContext().CreateTempSymbol();
- Frame.Function = LastNonPrivate;
- EmitLabel(Frame.Begin);
+ Frame.Function = LastSymbol;
+
+ // If the function is externally visible, we need to create a local
+ // symbol to avoid relocations.
+ StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
+ if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
+ Frame.Begin = LastSymbol;
+ } else {
+ Frame.Begin = getContext().CreateTempSymbol();
+ EmitLabel(Frame.Begin);
+ }
+
FrameInfos.push_back(Frame);
}
}
void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
- W64UnwindInfos.push_back(*Frame);
- CurrentW64UnwindInfo = &W64UnwindInfos.back();
+ W64UnwindInfos.push_back(Frame);
+ CurrentW64UnwindInfo = W64UnwindInfos.back();
}
void MCStreamer::EnsureValidW64UnwindInfo() {
report_fatal_error("No open Win64 EH frame function!");
}
-void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol) {
+void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a function before ending the previous one!");
- MCWin64EHUnwindInfo Frame;
- Frame.Begin = getContext().CreateTempSymbol();
- Frame.Function = Symbol;
- EmitLabel(Frame.Begin);
- setCurrentW64UnwindInfo(&Frame);
+ MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
+ Frame->Begin = getContext().CreateTempSymbol();
+ Frame->Function = Symbol;
+ EmitLabel(Frame->Begin);
+ setCurrentW64UnwindInfo(Frame);
}
void MCStreamer::EmitWin64EHEndProc() {
void MCStreamer::EmitWin64EHStartChained() {
EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo Frame;
+ MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- Frame.Begin = getContext().CreateTempSymbol();
- Frame.Function = CurFrame->Function;
- Frame.ChainedParent = CurFrame;
- EmitLabel(Frame.Begin);
- setCurrentW64UnwindInfo(&Frame);
+ Frame->Begin = getContext().CreateTempSymbol();
+ Frame->Function = CurFrame->Function;
+ Frame->ChainedParent = CurFrame;
+ EmitLabel(Frame->Begin);
+ setCurrentW64UnwindInfo(Frame);
}
void MCStreamer::EmitWin64EHEndChained() {
bool Except) {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (CurFrame->ChainedParent)
+ report_fatal_error("Chained unwind areas can't have handlers!");
CurFrame->ExceptionHandler = Sym;
- if (Unwind)
- CurFrame->UnwindOnly = true;
- else if (!Except)
+ if (!Except && !Unwind)
report_fatal_error("Don't know what kind of handler this is!");
+ if (Unwind)
+ CurFrame->HandlesUnwind = true;
+ if (Except)
+ CurFrame->HandlesExceptions = true;
}
void MCStreamer::EmitWin64EHHandlerData() {
- errs() << "Not implemented yet\n";
- abort();
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (CurFrame->ChainedParent)
+ report_fatal_error("Chained unwind areas can't have handlers!");
}
-void MCStreamer::EmitWin64EHPushReg(int64_t Register) {
- errs() << "Not implemented yet\n";
- abort();
+void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
+ EmitLabel(Label);
+ CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSetFrame(int64_t Register, int64_t Offset) {
- errs() << "Not implemented yet\n";
- abort();
+void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (CurFrame->LastFrameInst >= 0)
+ report_fatal_error("Frame register and offset already specified!");
+ if (Offset & 0x0F)
+ report_fatal_error("Misaligned frame pointer offset!");
+ MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
+ CurFrame->LastFrameInst = CurFrame->Instructions.size();
+ CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHAllocStack(int64_t Size) {
- errs() << "Not implemented yet\n";
- abort();
+void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
+ EnsureValidW64UnwindInfo();
+ if (Size & 7)
+ report_fatal_error("Misaligned stack allocation!");
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(Label, Size);
+ EmitLabel(Label);
+ CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSaveReg(int64_t Register, int64_t Offset) {
- errs() << "Not implemented yet\n";
- abort();
+void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
+ EnsureValidW64UnwindInfo();
+ if (Offset & 7)
+ report_fatal_error("Misaligned saved register offset!");
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(
+ Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
+ Label, Register, Offset);
+ EmitLabel(Label);
+ CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSaveXMM(int64_t Register, int64_t Offset) {
- errs() << "Not implemented yet\n";
- abort();
+void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
+ EnsureValidW64UnwindInfo();
+ if (Offset & 0x0F)
+ report_fatal_error("Misaligned saved vector register offset!");
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(
+ Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
+ Label, Register, Offset);
+ EmitLabel(Label);
+ CurFrame->Instructions.push_back(Inst);
}
void MCStreamer::EmitWin64EHPushFrame(bool Code) {
- errs() << "Not implemented yet\n";
- abort();
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (CurFrame->Instructions.size() > 0)
+ report_fatal_error("If present, PushMachFrame must be the first UOP");
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
+ EmitLabel(Label);
+ CurFrame->Instructions.push_back(Inst);
}
void MCStreamer::EmitWin64EHEndProlog() {
- errs() << "Not implemented yet\n";
- abort();
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ CurFrame->PrologEnd = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->PrologEnd);
}
void MCStreamer::EmitFnStart() {
if (EmitDebugFrame)
MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
}
+
+void MCStreamer::EmitW64Tables() {
+ if (!getNumW64UnwindInfos())
+ return;
+
+ MCWin64EHUnwindEmitter::Emit(*this);
+}
projects / oota-llvm.git / blobdiff