#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
#include <cstdlib>
using namespace llvm;
-MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), CurSection(0),
- PrevSection(0) {
+MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
+ 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,
+ 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() {
/// pass in a MCExpr for constant integers.
void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
unsigned AddrSpace) {
- assert(Size <= 8);
+ assert(Size <= 8 && "Invalid size");
+ 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().needsSetToChangeDiffSize()) {
- 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);
+}
+
+
+void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
+ unsigned AddrSpace) {
+ EmitValueImpl(Value, Size, AddrSpace);
}
void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
- unsigned AddrSpace) {
- EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace);
+ unsigned AddrSpace) {
+ EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
+ AddrSpace);
}
void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
unsigned Column, unsigned Flags,
unsigned Isa,
- unsigned Discriminator) {
+ unsigned Discriminator,
+ StringRef FileName) {
getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
Discriminator);
}
-bool MCStreamer::EmitCFIStartProc() {
- return false;
+MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
+ if (FrameInfos.empty())
+ return NULL;
+ return &FrameInfos.back();
+}
+
+void MCStreamer::EnsureValidFrame() {
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ if (!CurFrame || CurFrame->End)
+ report_fatal_error("No open frame");
+}
+
+void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
+ MCSymbol *EHSymbol) {
+}
+
+void MCStreamer::EmitLabel(MCSymbol *Symbol) {
+ assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+ assert(getCurrentSection() && "Cannot emit before setting section!");
+ Symbol->setSection(*getCurrentSection());
+ 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() {
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ if (CurFrame && !CurFrame->End)
+ report_fatal_error("Starting a frame before finishing the previous one!");
+
+ MCDwarfFrameInfo Frame;
+ 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::EmitCFIEndProc() {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->End = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->End);
+}
+
+void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(MachineLocation::VirtualFP);
+ MachineLocation Source(Register, -Offset);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(MachineLocation::VirtualFP);
+ MachineLocation Source(MachineLocation::VirtualFP, -Offset);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(MachineLocation::VirtualFP);
+ MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
+ MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(Register);
+ MachineLocation Source(MachineLocation::VirtualFP);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(Register, Offset);
+ MachineLocation Source(Register, Offset);
+ MCCFIInstruction Instruction(Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MachineLocation Dest(Register, Offset);
+ MachineLocation Source(Register, Offset);
+ MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
+ unsigned Encoding) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Personality = Sym;
+ CurFrame->PersonalityEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Lsda = Sym;
+ CurFrame->LsdaEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFIRememberState() {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestoreState() {
+ // FIXME: Error if there is no matching cfi_remember_state.
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label);
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISameValue(int64_t Register) {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
+ CurFrame->Instructions.push_back(Instruction);
}
-bool MCStreamer::EmitCFIEndProc() {
- return false;
+void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
+ W64UnwindInfos.push_back(Frame);
+ CurrentW64UnwindInfo = W64UnwindInfos.back();
}
-bool MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
- return false;
+void MCStreamer::EnsureValidW64UnwindInfo() {
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (!CurFrame || CurFrame->End)
+ report_fatal_error("No open Win64 EH frame function!");
}
-bool MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
- return false;
+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 = new MCWin64EHUnwindInfo;
+ Frame->Begin = getContext().CreateTempSymbol();
+ Frame->Function = Symbol;
+ EmitLabel(Frame->Begin);
+ setCurrentW64UnwindInfo(Frame);
}
-bool MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
- return false;
+void MCStreamer::EmitWin64EHEndProc() {
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (CurFrame->ChainedParent)
+ report_fatal_error("Not all chained regions terminated!");
+ CurFrame->End = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->End);
}
-bool MCStreamer::EmitCFIPersonality(const MCSymbol *Sym) {
- return false;
+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);
}
-bool MCStreamer::EmitCFILsda(const MCSymbol *Sym) {
- return false;
+void MCStreamer::EmitWin64EHEndChained() {
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (!CurFrame->ChainedParent)
+ report_fatal_error("End of a chained region outside a chained region!");
+ CurFrame->End = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->End);
+ CurrentW64UnwindInfo = CurFrame->ChainedParent;
+}
+
+void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
+ bool Except) {
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ if (CurFrame->ChainedParent)
+ report_fatal_error("Chained unwind areas can't have handlers!");
+ CurFrame->ExceptionHandler = Sym;
+ 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() {
+ 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;
+ 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;
+ 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;
+ 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 > 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 > 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;
+ 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() {
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ CurFrame->PrologEnd = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->PrologEnd);
+}
+
+void MCStreamer::EmitFnStart() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitFnEnd() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitCantUnwind() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitHandlerData() {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitPad(int64_t Offset) {
+ errs() << "Not implemented yet\n";
+ abort();
+}
+
+void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
+ errs() << "Not implemented yet\n";
+ abort();
}
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
T.toVector(Str);
EmitRawText(Str.str());
}
+
+void MCStreamer::EmitFrames(bool usingCFI) {
+ if (!getNumFrameInfos())
+ return;
+
+ if (EmitEHFrame)
+ MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
+
+ if (EmitDebugFrame)
+ MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
+}
+
+void MCStreamer::EmitW64Tables() {
+ if (!getNumW64UnwindInfos())
+ return;
+
+ MCWin64EHUnwindEmitter::Emit(*this);
+}
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