using namespace llvm;
MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
- EmitDebugFrame(false) {
+ EmitDebugFrame(false),
+ CurrentW64UnwindInfo(0),
+ LastSymbol(0),
+ UniqueCodeBeginSuffix(0),
+ UniqueDataBeginSuffix(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,
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);
}
/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
-void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace) {
+void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
+ unsigned Padding) {
SmallString<32> Tmp;
raw_svector_ostream OSE(Tmp);
- MCObjectWriter::EncodeULEB128(Value, OSE);
+ MCObjectWriter::EncodeULEB128(Value, OSE, Padding);
EmitBytes(OSE.str(), AddrSpace);
}
}
bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
+ StringRef Directory,
StringRef Filename) {
- return getContext().GetDwarfFile(Filename, FileNo) == 0;
+ return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
}
void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
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::EmitDataRegion() {
+ if (RegionIndicator == Data) return;
+
+ MCContext &Context = getContext();
+ const MCAsmInfo &MAI = Context.getAsmInfo();
+ if (!MAI.getSupportsDataRegions()) return;
+
+ // Generate a unique symbol name.
+ MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getDataBeginLabelName() +
+ Twine(UniqueDataBeginSuffix++));
+ EmitLabel(NewSym);
+
+ RegionIndicator = Data;
+}
+
+void MCStreamer::EmitCodeRegion() {
+ if (RegionIndicator == Code) return;
+
+ MCContext &Context = getContext();
+ const MCAsmInfo &MAI = Context.getAsmInfo();
+ if (!MAI.getSupportsDataRegions()) return;
+
+ // Generate a unique symbol name.
+ MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getCodeBeginLabelName() +
+ Twine(UniqueCodeBeginSuffix++));
+ EmitLabel(NewSym);
+
+ RegionIndicator = Code;
+}
+
+void MCStreamer::EmitJumpTable8Region() {
+ if (RegionIndicator == JumpTable8) return;
+
+ MCContext &Context = getContext();
+ const MCAsmInfo &MAI = Context.getAsmInfo();
+ if (!MAI.getSupportsDataRegions()) return;
+
+ // Generate a unique symbol name.
+ MCSymbol *NewSym =
+ Context.GetOrCreateSymbol(MAI.getJumpTable8BeginLabelName() +
+ Twine(UniqueDataBeginSuffix++));
+ EmitLabel(NewSym);
+
+ RegionIndicator = JumpTable8;
+}
+
+void MCStreamer::EmitJumpTable16Region() {
+ if (RegionIndicator == JumpTable16) return;
+
+ MCContext &Context = getContext();
+ const MCAsmInfo &MAI = Context.getAsmInfo();
+ if (!MAI.getSupportsDataRegions()) return;
+
+ // Generate a unique symbol name.
+ MCSymbol *NewSym =
+ Context.GetOrCreateSymbol(MAI.getJumpTable16BeginLabelName() +
+ Twine(UniqueDataBeginSuffix++));
+ EmitLabel(NewSym);
+
+ RegionIndicator = JumpTable16;
+}
+
+
+void MCStreamer::EmitJumpTable32Region() {
+ if (RegionIndicator == JumpTable32) return;
+
+ MCContext &Context = getContext();
+ const MCAsmInfo &MAI = Context.getAsmInfo();
+ if (!MAI.getSupportsDataRegions()) return;
+
+ // Generate a unique symbol name.
+ MCSymbol *NewSym =
+ Context.GetOrCreateSymbol(MAI.getJumpTable32BeginLabelName() +
+ Twine(UniqueDataBeginSuffix++));
+ EmitLabel(NewSym);
+
+ RegionIndicator = JumpTable32;
+}
+
+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);
+ RegionIndicator = Code;
}
void MCStreamer::EmitCFIEndProc() {
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
MCSymbol *Label = getContext().CreateTempSymbol();
EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::RememberState, Label);
CurFrame->Instructions.push_back(Instruction);
}
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
MCSymbol *Label = getContext().CreateTempSymbol();
EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::RestoreState, Label);
CurFrame->Instructions.push_back(Instruction);
}
CurFrame->Instructions.push_back(Instruction);
}
+void MCStreamer::EmitCFIRestore(int64_t Register) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label, Register);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIEscape(StringRef Values) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
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(unsigned Register) {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Register);
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
+ EmitLabel(Label);
CurFrame->Instructions.push_back(Inst);
}
void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Register, Offset);
+ 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(unsigned Size) {
EnsureValidW64UnwindInfo();
+ if (Size & 7)
+ report_fatal_error("Misaligned stack allocation!");
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- MCWin64EHInstruction Inst(Size);
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(Label, Size);
+ EmitLabel(Label);
CurFrame->Instructions.push_back(Inst);
}
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 > 0xFFFF ? Win64EH::UOP_SaveNonVol : Win64EH::UOP_SaveNonVolBig,
- Register, Offset);
+ Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
+ Label, Register, Offset);
+ EmitLabel(Label);
CurFrame->Instructions.push_back(Inst);
}
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 > 0xFFFF ? Win64EH::UOP_SaveXMM128 : Win64EH::UOP_SaveXMM128Big,
- Register, Offset);
+ 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) {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Code);
+ 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);
}
EmitLabel(CurFrame->PrologEnd);
}
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+ assert(0 && "This file format doesn't support this directive");
+}
+
void MCStreamer::EmitFnStart() {
errs() << "Not implemented yet\n";
abort();
if (EmitDebugFrame)
MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
}
+
+void MCStreamer::EmitW64Tables() {
+ if (!getNumW64UnwindInfos())
+ return;
+
+ MCWin64EHUnwindEmitter::Emit(*this);
+}