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-rw-r--r--lib/MC/MCStreamer.cpp137
1 files changed, 95 insertions, 42 deletions
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 7dccf0d..bdcdb97 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -37,7 +37,7 @@ void MCTargetStreamer::finish() {}
void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
MCStreamer::MCStreamer(MCContext &Ctx)
- : Context(Ctx), CurrentW64UnwindInfo(nullptr), LastSymbol(nullptr) {
+ : Context(Ctx), CurrentW64UnwindInfo(nullptr) {
SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
@@ -51,7 +51,6 @@ void MCStreamer::reset() {
delete W64UnwindInfos[i];
W64UnwindInfos.clear();
CurrentW64UnwindInfo = nullptr;
- LastSymbol = nullptr;
SectionStack.clear();
SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
@@ -234,20 +233,12 @@ void MCStreamer::EmitLabel(MCSymbol *Symbol) {
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();
@@ -273,17 +264,6 @@ void MCStreamer::EmitCFIStartProc(bool IsSimple) {
void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
}
-void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
- // Report an error if we haven't seen a symbol yet where we'd bind
- // .cfi_startproc.
- if (!LastSymbol)
- report_fatal_error("No symbol to start a frame");
- Frame.Function = LastSymbol;
- // We need to create a local symbol to avoid relocations.
- Frame.Begin = getContext().CreateTempSymbol();
- EmitLabel(Frame.Begin);
-}
-
void MCStreamer::EmitCFIEndProc() {
EnsureValidFrame();
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
@@ -291,11 +271,9 @@ void MCStreamer::EmitCFIEndProc() {
}
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() {
@@ -447,7 +425,7 @@ void MCStreamer::EnsureValidW64UnwindInfo() {
report_fatal_error("No open Win64 EH frame function!");
}
-void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
+void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a function before ending the previous one!");
@@ -458,7 +436,7 @@ void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
setCurrentW64UnwindInfo(Frame);
}
-void MCStreamer::EmitWin64EHEndProc() {
+void MCStreamer::EmitWinCFIEndProc() {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame->ChainedParent)
@@ -467,7 +445,7 @@ void MCStreamer::EmitWin64EHEndProc() {
EmitLabel(CurFrame->End);
}
-void MCStreamer::EmitWin64EHStartChained() {
+void MCStreamer::EmitWinCFIStartChained() {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
@@ -478,7 +456,7 @@ void MCStreamer::EmitWin64EHStartChained() {
setCurrentW64UnwindInfo(Frame);
}
-void MCStreamer::EmitWin64EHEndChained() {
+void MCStreamer::EmitWinCFIEndChained() {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (!CurFrame->ChainedParent)
@@ -488,8 +466,8 @@ void MCStreamer::EmitWin64EHEndChained() {
CurrentW64UnwindInfo = CurFrame->ChainedParent;
}
-void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
- bool Except) {
+void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
+ bool Except) {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame->ChainedParent)
@@ -503,14 +481,14 @@ void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
CurFrame->HandlesExceptions = true;
}
-void MCStreamer::EmitWin64EHHandlerData() {
+void MCStreamer::EmitWinEHHandlerData() {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame->ChainedParent)
report_fatal_error("Chained unwind areas can't have handlers!");
}
-void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
+void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
MCSymbol *Label = getContext().CreateTempSymbol();
@@ -519,13 +497,15 @@ void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
+void MCStreamer::EmitWinCFISetFrame(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!");
+ if (Offset > 240)
+ report_fatal_error("Frame offset must be less than or equal to 240!");
MCSymbol *Label = getContext().CreateTempSymbol();
MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
EmitLabel(Label);
@@ -533,8 +513,10 @@ void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
+void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
EnsureValidW64UnwindInfo();
+ if (Size == 0)
+ report_fatal_error("Allocation size must be non-zero!");
if (Size & 7)
report_fatal_error("Misaligned stack allocation!");
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
@@ -544,7 +526,7 @@ void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
+void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
EnsureValidW64UnwindInfo();
if (Offset & 7)
report_fatal_error("Misaligned saved register offset!");
@@ -557,7 +539,7 @@ void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
+void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
EnsureValidW64UnwindInfo();
if (Offset & 0x0F)
report_fatal_error("Misaligned saved vector register offset!");
@@ -570,7 +552,7 @@ void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHPushFrame(bool Code) {
+void MCStreamer::EmitWinCFIPushFrame(bool Code) {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame->Instructions.size() > 0)
@@ -581,7 +563,7 @@ void MCStreamer::EmitWin64EHPushFrame(bool Code) {
CurFrame->Instructions.push_back(Inst);
}
-void MCStreamer::EmitWin64EHEndProlog() {
+void MCStreamer::EmitWinCFIEndProlog() {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
CurFrame->PrologEnd = getContext().CreateTempSymbol();
@@ -589,11 +571,9 @@ void MCStreamer::EmitWin64EHEndProlog() {
}
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
@@ -629,9 +609,82 @@ void MCStreamer::Finish() {
}
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(const MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment) {}
+void MCStreamer::ChangeSection(const 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() {}
generated by cgit v1.1 at 2024-05-21 01:09:54 +0000