#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCWin64EH.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/raw_ostream.h"
void MCTargetStreamer::finish() {}
+void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
+
MCStreamer::MCStreamer(MCContext &Ctx)
- : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
- CurrentW64UnwindInfo(0), LastSymbol(0) {
+ : Context(Ctx), CurrentWinFrameInfo(nullptr) {
SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
MCStreamer::~MCStreamer() {
- for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
- delete W64UnwindInfos[i];
+ for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
+ delete WinFrameInfos[i];
}
void MCStreamer::reset() {
- for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
- delete W64UnwindInfos[i];
- W64UnwindInfos.clear();
- EmitEHFrame = true;
- EmitDebugFrame = false;
- CurrentW64UnwindInfo = 0;
- LastSymbol = 0;
+ DwarfFrameInfos.clear();
+ for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
+ delete WinFrameInfos[i];
+ WinFrameInfos.clear();
+ CurrentWinFrameInfo = nullptr;
+ SymbolOrdering.clear();
SectionStack.clear();
SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
-const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
- const MCSymbol *A,
- const MCSymbol *B) {
- 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;
-}
-
-const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
- if (Context.getAsmInfo()->hasAggressiveSymbolFolding() ||
- isa<MCSymbolRefExpr>(Expr))
- return Expr;
-
- MCSymbol *ABS = Context.CreateTempSymbol();
- EmitAssignment(ABS, Expr);
- return MCSymbolRefExpr::Create(ABS, Context);
-}
-
raw_ostream &MCStreamer::GetCommentOS() {
// By default, discard comments.
return nulls();
void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
- for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(),
- E = FrameInfos.end(); I != E; ++I)
- I->CompactUnwindEncoding =
- (MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0);
-}
-
-void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
- const MCSymbol *Label, int PointerSize) {
- // emit the sequence to set the address
- EmitIntValue(dwarf::DW_LNS_extended_op, 1);
- EmitULEB128IntValue(PointerSize + 1);
- EmitIntValue(dwarf::DW_LNE_set_address, 1);
- EmitSymbolValue(Label, PointerSize);
-
- // emit the sequence for the LineDelta (from 1) and a zero address delta.
- MCDwarfLineAddr::Emit(this, LineDelta, 0);
+ for (auto &FI : DwarfFrameInfos)
+ FI.CompactUnwindEncoding =
+ (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
}
/// EmitIntValue - Special case of EmitValue that avoids the client having to
/// pass in a MCExpr for constant integers.
void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
- assert(Size <= 8 && "Invalid size");
+ assert(1 <= Size && Size <= 8 && "Invalid size");
assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
"Invalid size");
char buf[8];
EmitBytes(OSE.str());
}
-void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
- const MCExpr *ABS = ForceExpAbs(Value);
- EmitValue(ABS, Size);
+void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) {
+ EmitValueImpl(Value, Size, Loc);
}
+void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
+ bool IsSectionRelative) {
+ assert((!IsSectionRelative || Size == 4) &&
+ "SectionRelative value requires 4-bytes");
-void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
- EmitValueImpl(Value, Size);
-}
-
-void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
- EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
+ if (!IsSectionRelative)
+ EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
+ else
+ EmitCOFFSecRel32(Sym);
}
void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
StringRef Directory,
StringRef Filename, unsigned CUID) {
- return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
+ return getContext().getDwarfFile(Directory, Filename, FileNo, CUID);
}
void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
Discriminator);
}
-MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
- if (FrameInfos.empty())
- return 0;
- return &FrameInfos.back();
+MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
+ MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
+ if (!Table.getLabel()) {
+ StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
+ Table.setLabel(
+ Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
+ }
+ return Table.getLabel();
+}
+
+MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
+ if (DwarfFrameInfos.empty())
+ return nullptr;
+ return &DwarfFrameInfos.back();
}
-void MCStreamer::EnsureValidFrame() {
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+void MCStreamer::EnsureValidDwarfFrame() {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
if (!CurFrame || CurFrame->End)
report_fatal_error("No open frame");
}
MCSymbol *EHSymbol) {
}
-void MCStreamer::InitSections() {
+void MCStreamer::InitSections(bool NoExecStack) {
SwitchSection(getContext().getObjectFileInfo()->getTextSection());
}
-void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
+void MCStreamer::AssignSection(MCSymbol *Symbol, MCSection *Section) {
if (Section)
Symbol->setSection(*Section);
else
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
assert(getCurrentSection().first && "Cannot emit before setting section!");
AssignSection(Symbol, getCurrentSection().first);
- LastSymbol = Symbol;
MCTargetStreamer *TS = getTargetStreamer();
if (TS)
TS->emitLabel(Symbol);
}
-void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
- assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
- assert(getCurrentSection().first && "Cannot emit before setting section!");
- AssignSection(Symbol, getCurrentSection().first);
- LastSymbol = Symbol;
-}
-
-void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
- EnsureValidFrame();
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
-}
-
void MCStreamer::EmitCFISections(bool EH, bool Debug) {
assert(EH || Debug);
- EmitEHFrame = EH;
- EmitDebugFrame = Debug;
}
void MCStreamer::EmitCFIStartProc(bool IsSimple) {
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a frame before finishing the previous one!");
Frame.IsSimple = IsSimple;
EmitCFIStartProcImpl(Frame);
- FrameInfos.push_back(Frame);
-}
+ const MCAsmInfo* MAI = Context.getAsmInfo();
+ if (MAI) {
+ for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) {
+ if (Inst.getOperation() == MCCFIInstruction::OpDefCfa ||
+ Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) {
+ Frame.CurrentCfaRegister = Inst.getRegister();
+ }
+ }
+ }
-void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+ DwarfFrameInfos.push_back(Frame);
}
-void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
- Frame.Function = LastSymbol;
- // We need to create a local symbol to avoid relocations.
- Frame.Begin = getContext().CreateTempSymbol();
- EmitLabel(Frame.Begin);
+void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
}
void MCStreamer::EmitCFIEndProc() {
- EnsureValidFrame();
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
EmitCFIEndProcImpl(*CurFrame);
}
void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
-}
-
-void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
- Frame.End = getContext().CreateTempSymbol();
- EmitLabel(Frame.End);
+ // Put a dummy non-null value in Frame.End to mark that this frame has been
+ // closed.
+ Frame.End = (MCSymbol *) 1;
}
MCSymbol *MCStreamer::EmitCFICommon() {
- EnsureValidFrame();
- MCSymbol *Label = getContext().CreateTempSymbol();
+ EnsureValidDwarfFrame();
+ MCSymbol *Label = getContext().createTempSymbol();
EmitLabel(Label);
return Label;
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createDefCfa(Label, Register, Offset);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
+ CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
}
void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createDefCfaOffset(Label, Offset);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createDefCfaRegister(Label, Register);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
+ CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
}
void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createOffset(Label, Register, Offset);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createRelOffset(Label, Register, Offset);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
unsigned Encoding) {
- EnsureValidFrame();
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Personality = Sym;
CurFrame->PersonalityEncoding = Encoding;
}
void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
- EnsureValidFrame();
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Lsda = Sym;
CurFrame->LsdaEncoding = Encoding;
}
void MCStreamer::EmitCFIRememberState() {
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
// FIXME: Error if there is no matching cfi_remember_state.
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createSameValue(Label, Register);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createRestore(Label, Register);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIEscape(StringRef Values) {
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFISignalFrame() {
- EnsureValidFrame();
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->IsSignalFrame = true;
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createUndefined(Label, Register);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createRegister(Label, Register1, Register2);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
MCSymbol *Label = EmitCFICommon();
MCCFIInstruction Instruction =
MCCFIInstruction::createWindowSave(Label);
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
-void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
- W64UnwindInfos.push_back(Frame);
- CurrentW64UnwindInfo = W64UnwindInfos.back();
-}
-
-void MCStreamer::EnsureValidW64UnwindInfo() {
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (!CurFrame || CurFrame->End)
+void MCStreamer::EnsureValidWinFrameInfo() {
+ const MCAsmInfo *MAI = Context.getAsmInfo();
+ if (!MAI->usesWindowsCFI())
+ report_fatal_error(".seh_* directives are not supported on this target");
+ if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
report_fatal_error("No open Win64 EH frame function!");
}
-void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (CurFrame && !CurFrame->End)
+void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
+ const MCAsmInfo *MAI = Context.getAsmInfo();
+ if (!MAI->usesWindowsCFI())
+ report_fatal_error(".seh_* directives are not supported on this target");
+ if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
report_fatal_error("Starting a function before ending the previous one!");
- MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
- Frame->Begin = getContext().CreateTempSymbol();
- Frame->Function = Symbol;
- EmitLabel(Frame->Begin);
- setCurrentW64UnwindInfo(Frame);
+
+ MCSymbol *StartProc = getContext().createTempSymbol();
+ EmitLabel(StartProc);
+
+ WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
+ CurrentWinFrameInfo = WinFrameInfos.back();
}
-void MCStreamer::EmitWin64EHEndProc() {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (CurFrame->ChainedParent)
+void MCStreamer::EmitWinCFIEndProc() {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->ChainedParent)
report_fatal_error("Not all chained regions terminated!");
- CurFrame->End = getContext().CreateTempSymbol();
- EmitLabel(CurFrame->End);
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+ CurrentWinFrameInfo->End = Label;
}
-void MCStreamer::EmitWin64EHStartChained() {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- Frame->Begin = getContext().CreateTempSymbol();
- Frame->Function = CurFrame->Function;
- Frame->ChainedParent = CurFrame;
- EmitLabel(Frame->Begin);
- setCurrentW64UnwindInfo(Frame);
+void MCStreamer::EmitWinCFIStartChained() {
+ EnsureValidWinFrameInfo();
+
+ MCSymbol *StartProc = getContext().createTempSymbol();
+ EmitLabel(StartProc);
+
+ WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
+ StartProc, CurrentWinFrameInfo));
+ CurrentWinFrameInfo = WinFrameInfos.back();
}
-void MCStreamer::EmitWin64EHEndChained() {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (!CurFrame->ChainedParent)
+void MCStreamer::EmitWinCFIEndChained() {
+ EnsureValidWinFrameInfo();
+ if (!CurrentWinFrameInfo->ChainedParent)
report_fatal_error("End of a chained region outside a chained region!");
- CurFrame->End = getContext().CreateTempSymbol();
- EmitLabel(CurFrame->End);
- CurrentW64UnwindInfo = CurFrame->ChainedParent;
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ CurrentWinFrameInfo->End = Label;
+ CurrentWinFrameInfo =
+ const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
}
-void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
- bool Except) {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (CurFrame->ChainedParent)
+void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
+ bool Except) {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->ChainedParent)
report_fatal_error("Chained unwind areas can't have handlers!");
- CurFrame->ExceptionHandler = Sym;
+ CurrentWinFrameInfo->ExceptionHandler = Sym;
if (!Except && !Unwind)
report_fatal_error("Don't know what kind of handler this is!");
if (Unwind)
- CurFrame->HandlesUnwind = true;
+ CurrentWinFrameInfo->HandlesUnwind = true;
if (Except)
- CurFrame->HandlesExceptions = true;
+ CurrentWinFrameInfo->HandlesExceptions = true;
}
-void MCStreamer::EmitWin64EHHandlerData() {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (CurFrame->ChainedParent)
+void MCStreamer::EmitWinEHHandlerData() {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->ChainedParent)
report_fatal_error("Chained unwind areas can't have handlers!");
}
-void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- MCSymbol *Label = getContext().CreateTempSymbol();
- MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
+void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
+ EnsureValidWinFrameInfo();
+
+ MCSymbol *Label = getContext().createTempSymbol();
EmitLabel(Label);
- CurFrame->Instructions.push_back(Inst);
+
+ WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (CurFrame->LastFrameInst >= 0)
+void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->LastFrameInst >= 0)
report_fatal_error("Frame register and offset already specified!");
if (Offset & 0x0F)
report_fatal_error("Misaligned frame pointer offset!");
- MCSymbol *Label = getContext().CreateTempSymbol();
- MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
+ if (Offset > 240)
+ report_fatal_error("Frame offset must be less than or equal to 240!");
+
+ MCSymbol *Label = getContext().createTempSymbol();
EmitLabel(Label);
- CurFrame->LastFrameInst = CurFrame->Instructions.size();
- CurFrame->Instructions.push_back(Inst);
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SetFPReg(Label, Register, Offset);
+ CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
- EnsureValidW64UnwindInfo();
+void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
+ EnsureValidWinFrameInfo();
+ if (Size == 0)
+ report_fatal_error("Allocation size must be non-zero!");
if (Size & 7)
report_fatal_error("Misaligned stack allocation!");
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- MCSymbol *Label = getContext().CreateTempSymbol();
- MCWin64EHInstruction Inst(Label, Size);
+
+ MCSymbol *Label = getContext().createTempSymbol();
EmitLabel(Label);
- CurFrame->Instructions.push_back(Inst);
+
+ WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
- EnsureValidW64UnwindInfo();
+void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
+ EnsureValidWinFrameInfo();
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);
+
+ MCSymbol *Label = getContext().createTempSymbol();
EmitLabel(Label);
- CurFrame->Instructions.push_back(Inst);
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
- EnsureValidW64UnwindInfo();
+void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
+ EnsureValidWinFrameInfo();
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);
+
+ MCSymbol *Label = getContext().createTempSymbol();
EmitLabel(Label);
- CurFrame->Instructions.push_back(Inst);
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SaveXMM(Label, Register, Offset);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHPushFrame(bool Code) {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- if (CurFrame->Instructions.size() > 0)
+void MCStreamer::EmitWinCFIPushFrame(bool Code) {
+ EnsureValidWinFrameInfo();
+ if (CurrentWinFrameInfo->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);
+
+ MCSymbol *Label = getContext().createTempSymbol();
EmitLabel(Label);
- CurFrame->Instructions.push_back(Inst);
+
+ WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
+ CurrentWinFrameInfo->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHEndProlog() {
- EnsureValidW64UnwindInfo();
- MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
- CurFrame->PrologEnd = getContext().CreateTempSymbol();
- EmitLabel(CurFrame->PrologEnd);
+void MCStreamer::EmitWinCFIEndProlog() {
+ EnsureValidWinFrameInfo();
+
+ MCSymbol *Label = getContext().createTempSymbol();
+ EmitLabel(Label);
+
+ CurrentWinFrameInfo->PrologEnd = Label;
}
void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
- llvm_unreachable("This file format doesn't support this directive");
}
void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
- llvm_unreachable("This file format doesn't support this directive");
}
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
EmitRawTextImpl(T.toStringRef(Str));
}
-void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
- if (!getNumFrameInfos())
- return;
-
- if (EmitEHFrame)
- MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
-
- if (EmitDebugFrame)
- MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
-}
-
-void MCStreamer::EmitW64Tables() {
- if (!getNumW64UnwindInfos())
- return;
-
- MCWin64EHUnwindEmitter::Emit(*this);
+void MCStreamer::EmitWindowsUnwindTables() {
}
void MCStreamer::Finish() {
- if (!FrameInfos.empty() && !FrameInfos.back().End)
+ if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
report_fatal_error("Unfinished frame!");
MCTargetStreamer *TS = getTargetStreamer();
FinishImpl();
}
-MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
- report_fatal_error("Not supported!");
- return *(static_cast<MCSymbolData*>(0));
+void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ visitUsedExpr(*Value);
+ Symbol->setVariableValue(Value);
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitAssignment(Symbol, Value);
+}
+
+void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
+}
+
+void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
+ switch (Expr.getKind()) {
+ case MCExpr::Target:
+ cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
+ break;
+
+ case MCExpr::Constant:
+ break;
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
+ visitUsedExpr(*BE.getLHS());
+ visitUsedExpr(*BE.getRHS());
+ break;
+ }
+
+ case MCExpr::SymbolRef:
+ visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
+ break;
+
+ case MCExpr::Unary:
+ visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
+ break;
+ }
+}
+
+void MCStreamer::EmitInstruction(const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
+ // Scan for values.
+ for (unsigned i = Inst.getNumOperands(); i--;)
+ if (Inst.getOperand(i).isExpr())
+ visitUsedExpr(*Inst.getOperand(i).getExpr());
+}
+
+void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
+void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
+void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
+void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
+void MCStreamer::EndCOFFSymbolDef() {}
+void MCStreamer::EmitFileDirective(StringRef Filename) {}
+void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
+void MCStreamer::EmitCOFFSymbolType(int Type) {}
+void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
+void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {}
+void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment) {}
+void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {}
+void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
+void MCStreamer::EmitBytes(StringRef Data) {}
+void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) {
+ visitUsedExpr(*Value);
+}
+void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {}
+void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit) {}
+bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) {
+ return false;
+}
+void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
+void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
+void MCStreamer::FinishImpl() {}
+void MCStreamer::EmitBundleUnlock() {}
+
+void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) {
+ assert(Section && "Cannot switch to a null section!");
+ MCSectionSubPair curSection = SectionStack.back().first;
+ SectionStack.back().second = curSection;
+ if (MCSectionSubPair(Section, Subsection) != curSection) {
+ ChangeSection(Section, Subsection);
+ SectionStack.back().first = MCSectionSubPair(Section, Subsection);
+ assert(!Section->hasEnded() && "Section already ended");
+ MCSymbol *Sym = Section->getBeginSymbol();
+ if (Sym && !Sym->isInSection())
+ EmitLabel(Sym);
+ }
+}
+
+MCSymbol *MCStreamer::endSection(MCSection *Section) {
+ // TODO: keep track of the last subsection so that this symbol appears in the
+ // correct place.
+ MCSymbol *Sym = Section->getEndSymbol(Context);
+ if (Sym->isInSection())
+ return Sym;
+
+ SwitchSection(Section);
+ EmitLabel(Sym);
+ return Sym;
}
projects / oota-llvm.git / blobdiff