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Add basic CFI methods to the streamer interface.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119972 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -352,6 +352,14 @@ namespace llvm {
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unsigned Isa,
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unsigned Discriminator);
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virtual bool EmitCFIStartProc();
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virtual bool EmitCFIEndProc();
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virtual bool EmitCFIDefCfaOffset(int64_t Offset);
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virtual bool EmitCFIDefCfaRegister(int64_t Register);
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virtual bool EmitCFIOffset(int64_t Register, int64_t Offset);
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virtual bool EmitCFIPersonality(const MCSymbol *Sym);
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virtual bool EmitCFILsda(const MCSymbol *Sym);
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/// EmitInstruction - Emit the given @p Instruction into the current
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/// section.
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virtual void EmitInstruction(const MCInst &Inst) = 0;
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@ -177,6 +177,14 @@ public:
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unsigned Column, unsigned Flags,
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unsigned Isa, unsigned Discriminator);
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virtual bool EmitCFIStartProc();
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virtual bool EmitCFIEndProc();
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virtual bool EmitCFIDefCfaOffset(int64_t Offset);
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virtual bool EmitCFIDefCfaRegister(int64_t Register);
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virtual bool EmitCFIOffset(int64_t Register, int64_t Offset);
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virtual bool EmitCFIPersonality(const MCSymbol *Sym);
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virtual bool EmitCFILsda(const MCSymbol *Sym);
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virtual void EmitInstruction(const MCInst &Inst);
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/// EmitRawText - If this file is backed by an assembly streamer, this dumps
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@ -702,6 +710,76 @@ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
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EmitEOL();
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}
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bool MCAsmStreamer::EmitCFIStartProc() {
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if (this->MCStreamer::EmitCFIStartProc())
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return true;
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OS << ".cfi_startproc";
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EmitEOL();
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return false;
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}
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bool MCAsmStreamer::EmitCFIEndProc() {
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if (this->MCStreamer::EmitCFIEndProc())
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return true;
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OS << ".cfi_endproc";
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EmitEOL();
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return false;
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}
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bool MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
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if (this->MCStreamer::EmitCFIDefCfaOffset(Offset))
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return true;
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OS << ".cfi_def_cfa_offset " << Offset;
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EmitEOL();
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return false;
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}
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bool MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) {
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if (this->MCStreamer::EmitCFIDefCfaRegister(Register))
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return true;
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OS << ".cfi_def_cfa_register " << Register;
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EmitEOL();
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return false;
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}
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bool MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
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if (this->MCStreamer::EmitCFIOffset(Register, Offset))
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return true;
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OS << ".cfi_offset " << Register << ", " << Offset;
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EmitEOL();
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return false;
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}
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bool MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym) {
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if (this->MCStreamer::EmitCFIPersonality(Sym))
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return true;
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OS << ".cfi_personality 0, " << *Sym;
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EmitEOL();
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return false;
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}
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bool MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym) {
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if (this->MCStreamer::EmitCFILsda(Sym))
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return true;
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OS << ".cfi_lsda 0, " << *Sym;
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EmitEOL();
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return false;
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}
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void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) {
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raw_ostream &OS = GetCommentOS();
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SmallString<256> Code;
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@ -2151,13 +2151,13 @@ bool GenericAsmParser::ParseDirectiveStabs(StringRef Directive,
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/// ::= .cfi_startproc
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bool GenericAsmParser::ParseDirectiveCFIStartProc(StringRef,
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SMLoc DirectiveLoc) {
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return false;
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return getStreamer().EmitCFIStartProc();
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}
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/// ParseDirectiveCFIEndProc
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/// ::= .cfi_endproc
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bool GenericAsmParser::ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc) {
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return false;
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return getStreamer().EmitCFIEndProc();
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}
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/// ParseDirectiveCFIDefCfaOffset
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@ -2168,7 +2168,7 @@ bool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef,
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if (getParser().ParseAbsoluteExpression(Offset))
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return true;
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return false;
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return getStreamer().EmitCFIDefCfaOffset(Offset);
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}
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/// ParseDirectiveCFIDefCfaRegister
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@ -2178,7 +2178,8 @@ bool GenericAsmParser::ParseDirectiveCFIDefCfaRegister(StringRef,
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int64_t Register = 0;
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if (getParser().ParseAbsoluteExpression(Register))
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return true;
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return false;
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return getStreamer().EmitCFIDefCfaRegister(Register);
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}
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/// ParseDirectiveCFIOffset
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@ -2196,13 +2197,13 @@ bool GenericAsmParser::ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc) {
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if (getParser().ParseAbsoluteExpression(Offset))
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return true;
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return false;
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return getStreamer().EmitCFIOffset(Register, Offset);
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}
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/// ParseDirectiveCFIPersonalityOrLsda
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/// ::= .cfi_personality encoding, [symbol_name]
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/// ::= .cfi_lsda encoding, [symbol_name]
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bool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef,
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bool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef IDVal,
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SMLoc DirectiveLoc) {
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int64_t Encoding = 0;
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if (getParser().ParseAbsoluteExpression(Encoding))
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@ -2210,6 +2211,9 @@ bool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef,
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if (Encoding == 255)
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return false;
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if (Encoding != 0)
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return TokError("unsupported encoding.");
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if (getLexer().isNot(AsmToken::Comma))
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return TokError("unexpected token in directive");
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Lex();
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@ -2217,7 +2221,15 @@ bool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef,
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StringRef Name;
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if (getParser().ParseIdentifier(Name))
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return TokError("expected identifier in directive");
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return false;
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MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
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if (IDVal == ".cfi_personality")
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return getStreamer().EmitCFIPersonality(Sym);
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else {
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assert(IDVal == ".cfi_lsda");
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return getStreamer().EmitCFILsda(Sym);
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}
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}
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/// ParseDirectiveMacrosOnOff
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@ -77,6 +77,34 @@ void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
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Discriminator);
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}
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bool MCStreamer::EmitCFIStartProc() {
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return false;
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}
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bool MCStreamer::EmitCFIEndProc() {
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return false;
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}
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bool MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
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return false;
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}
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bool MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
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return false;
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}
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bool MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
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return false;
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}
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bool MCStreamer::EmitCFIPersonality(const MCSymbol *Sym) {
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return false;
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}
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bool MCStreamer::EmitCFILsda(const MCSymbol *Sym) {
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return false;
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}
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/// EmitRawText - If this file is backed by an assembly streamer, this dumps
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/// the specified string in the output .s file. This capability is
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/// indicated by the hasRawTextSupport() predicate.
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