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-rw-r--r--contrib/llvm-project/llvm/lib/MC/MCStreamer.cpp1106
1 files changed, 1106 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/MC/MCStreamer.cpp b/contrib/llvm-project/llvm/lib/MC/MCStreamer.cpp
new file mode 100644
index 000000000000..decbb96817e3
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/MC/MCStreamer.cpp
@@ -0,0 +1,1106 @@
+//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/BinaryFormat/COFF.h"
+#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCCodeView.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCWin64EH.h"
+#include "llvm/MC/MCWinEH.h"
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+#include <cstdint>
+#include <cstdlib>
+#include <utility>
+
+using namespace llvm;
+
+MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
+ S.setTargetStreamer(this);
+}
+
+// Pin the vtables to this file.
+MCTargetStreamer::~MCTargetStreamer() = default;
+
+void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
+
+void MCTargetStreamer::finish() {}
+
+void MCTargetStreamer::changeSection(const MCSection *CurSection,
+ MCSection *Section,
+ const MCExpr *Subsection,
+ raw_ostream &OS) {
+ Section->PrintSwitchToSection(
+ *Streamer.getContext().getAsmInfo(),
+ Streamer.getContext().getObjectFileInfo()->getTargetTriple(), OS,
+ Subsection);
+}
+
+void MCTargetStreamer::emitDwarfFileDirective(StringRef Directive) {
+ Streamer.EmitRawText(Directive);
+}
+
+void MCTargetStreamer::emitValue(const MCExpr *Value) {
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+
+ Value->print(OS, Streamer.getContext().getAsmInfo());
+ Streamer.EmitRawText(OS.str());
+}
+
+void MCTargetStreamer::emitRawBytes(StringRef Data) {
+ const MCAsmInfo *MAI = Streamer.getContext().getAsmInfo();
+ const char *Directive = MAI->getData8bitsDirective();
+ for (const unsigned char C : Data.bytes()) {
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+
+ OS << Directive << (unsigned)C;
+ Streamer.EmitRawText(OS.str());
+ }
+}
+
+void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
+
+MCStreamer::MCStreamer(MCContext &Ctx)
+ : Context(Ctx), CurrentWinFrameInfo(nullptr),
+ UseAssemblerInfoForParsing(false) {
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
+}
+
+MCStreamer::~MCStreamer() {}
+
+void MCStreamer::reset() {
+ DwarfFrameInfos.clear();
+ CurrentWinFrameInfo = nullptr;
+ WinFrameInfos.clear();
+ SymbolOrdering.clear();
+ SectionStack.clear();
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
+}
+
+raw_ostream &MCStreamer::GetCommentOS() {
+ // By default, discard comments.
+ return nulls();
+}
+
+unsigned MCStreamer::getNumFrameInfos() { return DwarfFrameInfos.size(); }
+ArrayRef<MCDwarfFrameInfo> MCStreamer::getDwarfFrameInfos() const {
+ return DwarfFrameInfos;
+}
+
+void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
+
+void MCStreamer::addExplicitComment(const Twine &T) {}
+void MCStreamer::emitExplicitComments() {}
+
+void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
+ 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(1 <= Size && Size <= 8 && "Invalid size");
+ assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
+ "Invalid size");
+ char buf[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));
+}
+
+/// EmitULEB128IntValue - Special case of EmitULEB128Value that avoids the
+/// client having to pass in a MCExpr for constant integers.
+void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned PadTo) {
+ SmallString<128> Tmp;
+ raw_svector_ostream OSE(Tmp);
+ encodeULEB128(Value, OSE, PadTo);
+ EmitBytes(OSE.str());
+}
+
+/// EmitSLEB128IntValue - Special case of EmitSLEB128Value that avoids the
+/// client having to pass in a MCExpr for constant integers.
+void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
+ SmallString<128> Tmp;
+ raw_svector_ostream OSE(Tmp);
+ encodeSLEB128(Value, OSE);
+ EmitBytes(OSE.str());
+}
+
+void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, 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");
+
+ if (!IsSectionRelative)
+ EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size);
+ else
+ EmitCOFFSecRel32(Sym, /*Offset=*/0);
+}
+
+void MCStreamer::EmitDTPRel64Value(const MCExpr *Value) {
+ report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitDTPRel32Value(const MCExpr *Value) {
+ report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitTPRel64Value(const MCExpr *Value) {
+ report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitTPRel32Value(const MCExpr *Value) {
+ report_fatal_error("unsupported directive in streamer");
+}
+
+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");
+}
+
+/// Emit NumBytes bytes worth of the value specified by FillValue.
+/// This implements directives such as '.space'.
+void MCStreamer::emitFill(uint64_t NumBytes, uint8_t FillValue) {
+ emitFill(*MCConstantExpr::create(NumBytes, getContext()), FillValue);
+}
+
+/// The implementation in this class just redirects to emitFill.
+void MCStreamer::EmitZeros(uint64_t NumBytes) {
+ emitFill(NumBytes, 0);
+}
+
+Expected<unsigned>
+MCStreamer::tryEmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
+ StringRef Filename,
+ Optional<MD5::MD5Result> Checksum,
+ Optional<StringRef> Source,
+ unsigned CUID) {
+ return getContext().getDwarfFile(Directory, Filename, FileNo, Checksum,
+ Source, CUID);
+}
+
+void MCStreamer::emitDwarfFile0Directive(StringRef Directory,
+ StringRef Filename,
+ Optional<MD5::MD5Result> Checksum,
+ Optional<StringRef> Source,
+ unsigned CUID) {
+ getContext().setMCLineTableRootFile(CUID, Directory, Filename, Checksum,
+ Source);
+}
+
+void MCStreamer::EmitCFIBKeyFrame() {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->IsBKeyFrame = true;
+}
+
+void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
+ unsigned Column, unsigned Flags,
+ unsigned Isa,
+ unsigned Discriminator,
+ StringRef FileName) {
+ getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
+ Discriminator);
+}
+
+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();
+}
+
+bool MCStreamer::hasUnfinishedDwarfFrameInfo() {
+ return !DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End;
+}
+
+MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
+ if (!hasUnfinishedDwarfFrameInfo()) {
+ getContext().reportError(SMLoc(), "this directive must appear between "
+ ".cfi_startproc and .cfi_endproc "
+ "directives");
+ return nullptr;
+ }
+ return &DwarfFrameInfos.back();
+}
+
+bool MCStreamer::EmitCVFileDirective(unsigned FileNo, StringRef Filename,
+ ArrayRef<uint8_t> Checksum,
+ unsigned ChecksumKind) {
+ return getContext().getCVContext().addFile(*this, FileNo, Filename, Checksum,
+ ChecksumKind);
+}
+
+bool MCStreamer::EmitCVFuncIdDirective(unsigned FunctionId) {
+ return getContext().getCVContext().recordFunctionId(FunctionId);
+}
+
+bool MCStreamer::EmitCVInlineSiteIdDirective(unsigned FunctionId,
+ unsigned IAFunc, unsigned IAFile,
+ unsigned IALine, unsigned IACol,
+ SMLoc Loc) {
+ if (getContext().getCVContext().getCVFunctionInfo(IAFunc) == nullptr) {
+ getContext().reportError(Loc, "parent function id not introduced by "
+ ".cv_func_id or .cv_inline_site_id");
+ return true;
+ }
+
+ return getContext().getCVContext().recordInlinedCallSiteId(
+ FunctionId, IAFunc, IAFile, IALine, IACol);
+}
+
+void MCStreamer::EmitCVLocDirective(unsigned FunctionId, unsigned FileNo,
+ unsigned Line, unsigned Column,
+ bool PrologueEnd, bool IsStmt,
+ StringRef FileName, SMLoc Loc) {}
+
+bool MCStreamer::checkCVLocSection(unsigned FuncId, unsigned FileNo,
+ SMLoc Loc) {
+ CodeViewContext &CVC = getContext().getCVContext();
+ MCCVFunctionInfo *FI = CVC.getCVFunctionInfo(FuncId);
+ if (!FI) {
+ getContext().reportError(
+ Loc, "function id not introduced by .cv_func_id or .cv_inline_site_id");
+ return false;
+ }
+
+ // Track the section
+ if (FI->Section == nullptr)
+ FI->Section = getCurrentSectionOnly();
+ else if (FI->Section != getCurrentSectionOnly()) {
+ getContext().reportError(
+ Loc,
+ "all .cv_loc directives for a function must be in the same section");
+ return false;
+ }
+ return true;
+}
+
+void MCStreamer::EmitCVLinetableDirective(unsigned FunctionId,
+ const MCSymbol *Begin,
+ const MCSymbol *End) {}
+
+void MCStreamer::EmitCVInlineLinetableDirective(unsigned PrimaryFunctionId,
+ unsigned SourceFileId,
+ unsigned SourceLineNum,
+ const MCSymbol *FnStartSym,
+ const MCSymbol *FnEndSym) {}
+
+void MCStreamer::EmitCVDefRangeDirective(
+ ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
+ StringRef FixedSizePortion) {}
+
+void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
+ MCSymbol *EHSymbol) {
+}
+
+void MCStreamer::InitSections(bool NoExecStack) {
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+}
+
+void MCStreamer::AssignFragment(MCSymbol *Symbol, MCFragment *Fragment) {
+ assert(Fragment);
+ Symbol->setFragment(Fragment);
+
+ // As we emit symbols into a section, track the order so that they can
+ // be sorted upon later. Zero is reserved to mean 'unemitted'.
+ SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
+}
+
+void MCStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
+ Symbol->redefineIfPossible();
+
+ if (!Symbol->isUndefined() || Symbol->isVariable())
+ return getContext().reportError(Loc, "invalid symbol redefinition");
+
+ assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+ assert(getCurrentSectionOnly() && "Cannot emit before setting section!");
+ assert(!Symbol->getFragment() && "Unexpected fragment on symbol data!");
+ assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
+
+ Symbol->setFragment(&getCurrentSectionOnly()->getDummyFragment());
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitLabel(Symbol);
+}
+
+void MCStreamer::EmitCFISections(bool EH, bool Debug) {
+ assert(EH || Debug);
+}
+
+void MCStreamer::EmitCFIStartProc(bool IsSimple, SMLoc Loc) {
+ if (hasUnfinishedDwarfFrameInfo())
+ return getContext().reportError(
+ Loc, "starting new .cfi frame before finishing the previous one");
+
+ MCDwarfFrameInfo Frame;
+ Frame.IsSimple = IsSimple;
+ EmitCFIStartProcImpl(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();
+ }
+ }
+ }
+
+ DwarfFrameInfos.push_back(Frame);
+}
+
+void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+}
+
+void MCStreamer::EmitCFIEndProc() {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ EmitCFIEndProcImpl(*CurFrame);
+}
+
+void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+ // Put a dummy non-null value in Frame.End to mark that this frame has been
+ // closed.
+ Frame.End = (MCSymbol *)1;
+}
+
+MCSymbol *MCStreamer::EmitCFILabel() {
+ // Return a dummy non-null value so that label fields appear filled in when
+ // generating textual assembly.
+ return (MCSymbol *)1;
+}
+
+void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfa(Label, Register, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+ CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
+}
+
+void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaOffset(Label, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaRegister(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+ CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
+}
+
+void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createOffset(Label, Register, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRelOffset(Label, Register, Offset);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
+ unsigned Encoding) {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Personality = Sym;
+ CurFrame->PersonalityEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Lsda = Sym;
+ CurFrame->LsdaEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFIRememberState() {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestoreState() {
+ // FIXME: Error if there is no matching cfi_remember_state.
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISameValue(int64_t Register) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createSameValue(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestore(int64_t Register) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRestore(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIEscape(StringRef Values) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIGnuArgsSize(int64_t Size) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createGnuArgsSize(Label, Size);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISignalFrame() {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->IsSignalFrame = true;
+}
+
+void MCStreamer::EmitCFIUndefined(int64_t Register) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createUndefined(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRegister(Label, Register1, Register2);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIWindowSave() {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createWindowSave(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFINegateRAState() {
+ MCSymbol *Label = EmitCFILabel();
+ MCCFIInstruction Instruction = MCCFIInstruction::createNegateRAState(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIReturnColumn(int64_t Register) {
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ if (!CurFrame)
+ return;
+ CurFrame->RAReg = Register;
+}
+
+WinEH::FrameInfo *MCStreamer::EnsureValidWinFrameInfo(SMLoc Loc) {
+ const MCAsmInfo *MAI = Context.getAsmInfo();
+ if (!MAI->usesWindowsCFI()) {
+ getContext().reportError(
+ Loc, ".seh_* directives are not supported on this target");
+ return nullptr;
+ }
+ if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End) {
+ getContext().reportError(
+ Loc, ".seh_ directive must appear within an active frame");
+ return nullptr;
+ }
+ return CurrentWinFrameInfo;
+}
+
+void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc) {
+ const MCAsmInfo *MAI = Context.getAsmInfo();
+ if (!MAI->usesWindowsCFI())
+ return getContext().reportError(
+ Loc, ".seh_* directives are not supported on this target");
+ if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
+ getContext().reportError(
+ Loc, "Starting a function before ending the previous one!");
+
+ MCSymbol *StartProc = EmitCFILabel();
+
+ WinFrameInfos.emplace_back(
+ llvm::make_unique<WinEH::FrameInfo>(Symbol, StartProc));
+ CurrentWinFrameInfo = WinFrameInfos.back().get();
+ CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
+}
+
+void MCStreamer::EmitWinCFIEndProc(SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (CurFrame->ChainedParent)
+ getContext().reportError(Loc, "Not all chained regions terminated!");
+
+ MCSymbol *Label = EmitCFILabel();
+ CurFrame->End = Label;
+}
+
+void MCStreamer::EmitWinCFIFuncletOrFuncEnd(SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (CurFrame->ChainedParent)
+ getContext().reportError(Loc, "Not all chained regions terminated!");
+
+ MCSymbol *Label = EmitCFILabel();
+ CurFrame->FuncletOrFuncEnd = Label;
+}
+
+void MCStreamer::EmitWinCFIStartChained(SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+
+ MCSymbol *StartProc = EmitCFILabel();
+
+ WinFrameInfos.emplace_back(llvm::make_unique<WinEH::FrameInfo>(
+ CurFrame->Function, StartProc, CurFrame));
+ CurrentWinFrameInfo = WinFrameInfos.back().get();
+ CurrentWinFrameInfo->TextSection = getCurrentSectionOnly();
+}
+
+void MCStreamer::EmitWinCFIEndChained(SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (!CurFrame->ChainedParent)
+ return getContext().reportError(
+ Loc, "End of a chained region outside a chained region!");
+
+ MCSymbol *Label = EmitCFILabel();
+
+ CurFrame->End = Label;
+ CurrentWinFrameInfo = const_cast<WinEH::FrameInfo *>(CurFrame->ChainedParent);
+}
+
+void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except,
+ SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (CurFrame->ChainedParent)
+ return getContext().reportError(
+ Loc, "Chained unwind areas can't have handlers!");
+ CurFrame->ExceptionHandler = Sym;
+ if (!Except && !Unwind)
+ getContext().reportError(Loc, "Don't know what kind of handler this is!");
+ if (Unwind)
+ CurFrame->HandlesUnwind = true;
+ if (Except)
+ CurFrame->HandlesExceptions = true;
+}
+
+void MCStreamer::EmitWinEHHandlerData(SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (CurFrame->ChainedParent)
+ getContext().reportError(Loc, "Chained unwind areas can't have handlers!");
+}
+
+void MCStreamer::emitCGProfileEntry(const MCSymbolRefExpr *From,
+ const MCSymbolRefExpr *To, uint64_t Count) {
+}
+
+static MCSection *getWinCFISection(MCContext &Context, unsigned *NextWinCFIID,
+ MCSection *MainCFISec,
+ const MCSection *TextSec) {
+ // If this is the main .text section, use the main unwind info section.
+ if (TextSec == Context.getObjectFileInfo()->getTextSection())
+ return MainCFISec;
+
+ const auto *TextSecCOFF = cast<MCSectionCOFF>(TextSec);
+ auto *MainCFISecCOFF = cast<MCSectionCOFF>(MainCFISec);
+ unsigned UniqueID = TextSecCOFF->getOrAssignWinCFISectionID(NextWinCFIID);
+
+ // If this section is COMDAT, this unwind section should be COMDAT associative
+ // with its group.
+ const MCSymbol *KeySym = nullptr;
+ if (TextSecCOFF->getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT) {
+ KeySym = TextSecCOFF->getCOMDATSymbol();
+
+ // In a GNU environment, we can't use associative comdats. Instead, do what
+ // GCC does, which is to make plain comdat selectany section named like
+ // ".[px]data$_Z3foov".
+ if (!Context.getAsmInfo()->hasCOFFAssociativeComdats()) {
+ std::string SectionName =
+ (MainCFISecCOFF->getSectionName() + "$" +
+ TextSecCOFF->getSectionName().split('$').second)
+ .str();
+ return Context.getCOFFSection(
+ SectionName,
+ MainCFISecCOFF->getCharacteristics() | COFF::IMAGE_SCN_LNK_COMDAT,
+ MainCFISecCOFF->getKind(), "", COFF::IMAGE_COMDAT_SELECT_ANY);
+ }
+ }
+
+ return Context.getAssociativeCOFFSection(MainCFISecCOFF, KeySym, UniqueID);
+}
+
+MCSection *MCStreamer::getAssociatedPDataSection(const MCSection *TextSec) {
+ return getWinCFISection(getContext(), &NextWinCFIID,
+ getContext().getObjectFileInfo()->getPDataSection(),
+ TextSec);
+}
+
+MCSection *MCStreamer::getAssociatedXDataSection(const MCSection *TextSec) {
+ return getWinCFISection(getContext(), &NextWinCFIID,
+ getContext().getObjectFileInfo()->getXDataSection(),
+ TextSec);
+}
+
+void MCStreamer::EmitSyntaxDirective() {}
+
+void MCStreamer::EmitWinCFIPushReg(unsigned Register, SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+
+ MCSymbol *Label = EmitCFILabel();
+
+ WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
+ CurFrame->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset,
+ SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (CurFrame->LastFrameInst >= 0)
+ return getContext().reportError(
+ Loc, "frame register and offset can be set at most once");
+ if (Offset & 0x0F)
+ return getContext().reportError(Loc, "offset is not a multiple of 16");
+ if (Offset > 240)
+ return getContext().reportError(
+ Loc, "frame offset must be less than or equal to 240");
+
+ MCSymbol *Label = EmitCFILabel();
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SetFPReg(Label, Register, Offset);
+ CurFrame->LastFrameInst = CurFrame->Instructions.size();
+ CurFrame->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIAllocStack(unsigned Size, SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (Size == 0)
+ return getContext().reportError(Loc,
+ "stack allocation size must be non-zero");
+ if (Size & 7)
+ return getContext().reportError(
+ Loc, "stack allocation size is not a multiple of 8");
+
+ MCSymbol *Label = EmitCFILabel();
+
+ WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
+ CurFrame->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset,
+ SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+
+ if (Offset & 7)
+ return getContext().reportError(
+ Loc, "register save offset is not 8 byte aligned");
+
+ MCSymbol *Label = EmitCFILabel();
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
+ CurFrame->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset,
+ SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (Offset & 0x0F)
+ return getContext().reportError(Loc, "offset is not a multiple of 16");
+
+ MCSymbol *Label = EmitCFILabel();
+
+ WinEH::Instruction Inst =
+ Win64EH::Instruction::SaveXMM(Label, Register, Offset);
+ CurFrame->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIPushFrame(bool Code, SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+ if (!CurFrame->Instructions.empty())
+ return getContext().reportError(
+ Loc, "If present, PushMachFrame must be the first UOP");
+
+ MCSymbol *Label = EmitCFILabel();
+
+ WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
+ CurFrame->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIEndProlog(SMLoc Loc) {
+ WinEH::FrameInfo *CurFrame = EnsureValidWinFrameInfo(Loc);
+ if (!CurFrame)
+ return;
+
+ MCSymbol *Label = EmitCFILabel();
+
+ CurFrame->PrologEnd = Label;
+}
+
+void MCStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {}
+
+void MCStreamer::EmitCOFFSymbolIndex(MCSymbol const *Symbol) {}
+
+void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {}
+
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) {}
+
+void MCStreamer::EmitCOFFImgRel32(MCSymbol const *Symbol, int64_t Offset) {}
+
+/// 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.
+void MCStreamer::EmitRawTextImpl(StringRef String) {
+ // This is not llvm_unreachable for the sake of out of tree backend
+ // developers who may not have assembly streamers and should serve as a
+ // reminder to not accidentally call EmitRawText in the absence of such.
+ report_fatal_error("EmitRawText called on an MCStreamer that doesn't support "
+ "it (target backend is likely missing an AsmStreamer "
+ "implementation)");
+}
+
+void MCStreamer::EmitRawText(const Twine &T) {
+ SmallString<128> Str;
+ EmitRawTextImpl(T.toStringRef(Str));
+}
+
+void MCStreamer::EmitWindowsUnwindTables() {
+}
+
+void MCStreamer::Finish() {
+ if ((!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End) ||
+ (!WinFrameInfos.empty() && !WinFrameInfos.back()->End)) {
+ getContext().reportError(SMLoc(), "Unfinished frame!");
+ return;
+ }
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->finish();
+
+ FinishImpl();
+}
+
+void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ visitUsedExpr(*Value);
+ Symbol->setVariableValue(Value);
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitAssignment(Symbol, Value);
+}
+
+void MCTargetStreamer::prettyPrintAsm(MCInstPrinter &InstPrinter,
+ raw_ostream &OS, const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
+ InstPrinter.printInst(&Inst, OS, "", STI);
+}
+
+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 &) {
+ // Scan for values.
+ for (unsigned i = Inst.getNumOperands(); i--;)
+ if (Inst.getOperand(i).isExpr())
+ visitUsedExpr(*Inst.getOperand(i).getExpr());
+}
+
+void MCStreamer::emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo,
+ unsigned Size) {
+ // Get the Hi-Lo expression.
+ const MCExpr *Diff =
+ MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Context),
+ MCSymbolRefExpr::create(Lo, Context), Context);
+
+ const MCAsmInfo *MAI = Context.getAsmInfo();
+ if (!MAI->doesSetDirectiveSuppressReloc()) {
+ EmitValue(Diff, Size);
+ return;
+ }
+
+ // Otherwise, emit with .set (aka assignment).
+ MCSymbol *SetLabel = Context.createTempSymbol("set", true);
+ EmitAssignment(SetLabel, Diff);
+ EmitSymbolValue(SetLabel, Size);
+}
+
+void MCStreamer::emitAbsoluteSymbolDiffAsULEB128(const MCSymbol *Hi,
+ const MCSymbol *Lo) {
+ // Get the Hi-Lo expression.
+ const MCExpr *Diff =
+ MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Context),
+ MCSymbolRefExpr::create(Lo, Context), Context);
+
+ EmitULEB128Value(Diff);
+}
+
+void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
+void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
+void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
+void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
+ llvm_unreachable("this directive only supported on COFF targets");
+}
+void MCStreamer::EndCOFFSymbolDef() {
+ llvm_unreachable("this directive only supported on COFF targets");
+}
+void MCStreamer::EmitFileDirective(StringRef Filename) {}
+void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {
+ llvm_unreachable("this directive only supported on COFF targets");
+}
+void MCStreamer::EmitCOFFSymbolType(int Type) {
+ llvm_unreachable("this directive only supported on COFF targets");
+}
+void MCStreamer::emitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
+void MCStreamer::emitELFSymverDirective(StringRef AliasName,
+ const MCSymbol *Aliasee) {}
+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::EmitBinaryData(StringRef Data) { EmitBytes(Data); }
+void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) {
+ visitUsedExpr(*Value);
+}
+void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
+void MCStreamer::emitFill(const MCExpr &NumBytes, uint64_t Value, SMLoc Loc) {}
+void MCStreamer::emitFill(const MCExpr &NumValues, int64_t Size, int64_t Expr,
+ SMLoc Loc) {}
+void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {}
+void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit) {}
+void MCStreamer::emitValueToOffset(const MCExpr *Offset, unsigned char Value,
+ SMLoc Loc) {}
+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;
+}
+
+void MCStreamer::EmitVersionForTarget(const Triple &Target,
+ const VersionTuple &SDKVersion) {
+ if (!Target.isOSBinFormatMachO() || !Target.isOSDarwin())
+ return;
+ // Do we even know the version?
+ if (Target.getOSMajorVersion() == 0)
+ return;
+
+ unsigned Major;
+ unsigned Minor;
+ unsigned Update;
+ if (Target.isMacCatalystEnvironment()) {
+ // Mac Catalyst always uses the build version load command.
+ Target.getiOSVersion(Major, Minor, Update);
+ assert(Major && "A non-zero major version is expected");
+ EmitBuildVersion(MachO::PLATFORM_MACCATALYST, Major, Minor, Update,
+ SDKVersion);
+ return;
+ }
+
+ MCVersionMinType VersionType;
+ if (Target.isWatchOS()) {
+ VersionType = MCVM_WatchOSVersionMin;
+ Target.getWatchOSVersion(Major, Minor, Update);
+ } else if (Target.isTvOS()) {
+ VersionType = MCVM_TvOSVersionMin;
+ Target.getiOSVersion(Major, Minor, Update);
+ } else if (Target.isMacOSX()) {
+ VersionType = MCVM_OSXVersionMin;
+ if (!Target.getMacOSXVersion(Major, Minor, Update))
+ Major = 0;
+ } else {
+ VersionType = MCVM_IOSVersionMin;
+ Target.getiOSVersion(Major, Minor, Update);
+ }
+ if (Major != 0)
+ EmitVersionMin(VersionType, Major, Minor, Update, SDKVersion);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-07 09:43:58 +0000