//
//===----------------------------------------------------------------------===//
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
-#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/LEB128.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Twine.h"
#include <cstdlib>
using namespace llvm;
-MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
- EmitDebugFrame(false) {
+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,
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);
}
/// 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) {
- SmallString<32> Tmp;
+void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
+ unsigned Padding) {
+ SmallString<128> Tmp;
raw_svector_ostream OSE(Tmp);
- MCObjectWriter::EncodeULEB128(Value, OSE);
+ encodeULEB128(Value, OSE, Padding);
EmitBytes(OSE.str(), AddrSpace);
}
/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
- SmallString<32> Tmp;
+ SmallString<128> Tmp;
raw_svector_ostream OSE(Tmp);
- MCObjectWriter::EncodeSLEB128(Value, OSE);
+ encodeSLEB128(Value, OSE);
EmitBytes(OSE.str(), 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);
}
AddrSpace);
}
+void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
+ report_fatal_error("unsupported directive in streamer");
+}
+
void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
report_fatal_error("unsupported directive in streamer");
}
}
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::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);
+ EmitCFIStartProcImpl(Frame);
+
FrameInfos.push_back(Frame);
}
+void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+}
+
+void MCStreamer::RecordProcStart(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);
+ }
+}
+
void MCStreamer::EmitCFIEndProc() {
EnsureValidFrame();
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- CurFrame->End = getContext().CreateTempSymbol();
- EmitLabel(CurFrame->End);
+ EmitCFIEndProcImpl(*CurFrame);
}
-void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
+void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+}
+
+void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
+ Frame.End = getContext().CreateTempSymbol();
+ EmitLabel(Frame.End);
+}
+
+MCSymbol *MCStreamer::EmitCFICommon() {
EnsureValidFrame();
- MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
MCSymbol *Label = getContext().CreateTempSymbol();
EmitLabel(Label);
- MachineLocation Dest(MachineLocation::VirtualFP);
- MachineLocation Source(Register, -Offset);
- MCCFIInstruction Instruction(Label, Dest, Source);
+ return Label;
+}
+
+void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfa(Label, Register, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaOffset(Label, Offset);
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();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
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();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaRegister(Label, Register);
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();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createOffset(Label, Register, Offset);
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();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRelOffset(Label, Register, Offset);
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::EmitCFIRememberState() {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
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();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
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) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createSameValue(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestore(int64_t Register) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRestore(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIEscape(StringRef Values) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISignalFrame() {
EnsureValidFrame();
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
+ CurFrame->IsSignalFrame = true;
+}
+
+void MCStreamer::EmitCFIUndefined(int64_t Register) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createUndefined(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRegister(Label, Register1, Register2);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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);
}
void MCStreamer::EmitWin64EHEndProlog() {
- errs() << "Not implemented yet\n";
- abort();
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
+ CurFrame->PrologEnd = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->PrologEnd);
+}
+
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+ llvm_unreachable("This file format doesn't support this directive");
}
void MCStreamer::EmitFnStart() {
abort();
}
+void MCStreamer::EmitTCEntry(const MCSymbol &S) {
+ llvm_unreachable("Unsupported method");
+}
+
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
/// the specified string in the output .s file. This capability is
/// indicated by the hasRawTextSupport() predicate.
if (EmitDebugFrame)
MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
}
+
+void MCStreamer::EmitW64Tables() {
+ if (!getNumW64UnwindInfos())
+ return;
+
+ MCWin64EHUnwindEmitter::Emit(*this);
+}
+
+void MCStreamer::Finish() {
+ if (!FrameInfos.empty() && !FrameInfos.back().End)
+ report_fatal_error("Unfinished frame!");
+
+ FinishImpl();
+}
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