From: Joerg Sonnenberger Date: Sun, 10 Aug 2014 11:35:12 +0000 (+0000) Subject: If available, pass down the Fixup object to EvaluateAsRelocatable. X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b2b363408b8cec828681a1264f4438b41b834042;p=oota-llvm.git If available, pass down the Fixup object to EvaluateAsRelocatable. At least on PowerPC, the interpretation of certain modifiers depends on the context they appear in. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215310 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/include/llvm/MC/MCExpr.h b/include/llvm/MC/MCExpr.h index e96ecb4be17..6536aaa0f8f 100644 --- a/include/llvm/MC/MCExpr.h +++ b/include/llvm/MC/MCExpr.h @@ -19,6 +19,7 @@ class MCAsmInfo; class MCAsmLayout; class MCAssembler; class MCContext; +class MCFixup; class MCSection; class MCSectionData; class MCStreamer; @@ -54,6 +55,7 @@ protected: bool EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, + const MCFixup *Fixup, const SectionAddrMap *Addrs, bool InSet, bool ForceVarExpansion) const; @@ -92,8 +94,10 @@ public: /// /// @param Res - The relocatable value, if evaluation succeeds. /// @param Layout - The assembler layout object to use for evaluating values. + /// @param Fixup - The Fixup object if available. /// @result - True on success. - bool EvaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout) const; + bool EvaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout, + const MCFixup *Fixup) const; /// \brief Try to evaluate the expression to the form (a - b + constant) where /// neither a nor b are variables. @@ -101,7 +105,8 @@ public: /// This is a more aggressive variant of EvaluateAsRelocatable. The intended /// use is for when relocations are not available, like the symbol value in /// the symbol table. - bool EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout) const; + bool EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout, + const MCFixup *Fixup) const; /// FindAssociatedSection - Find the "associated section" for this expression, /// which is currently defined as the absolute section for constants, or @@ -524,7 +529,8 @@ public: virtual void PrintImpl(raw_ostream &OS) const = 0; virtual bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const = 0; + const MCAsmLayout *Layout, + const MCFixup *Fixup) const = 0; virtual void visitUsedExpr(MCStreamer& Streamer) const = 0; virtual const MCSection *FindAssociatedSection() const = 0; diff --git a/lib/MC/MCAssembler.cpp b/lib/MC/MCAssembler.cpp index a8aad7124bd..512f695d0d5 100644 --- a/lib/MC/MCAssembler.cpp +++ b/lib/MC/MCAssembler.cpp @@ -141,7 +141,7 @@ static bool getSymbolOffsetImpl(const MCAsmLayout &Layout, // If SD is a variable, evaluate it. MCValue Target; - if (!S.getVariableValue()->EvaluateAsValue(Target, &Layout)) + if (!S.getVariableValue()->EvaluateAsValue(Target, &Layout, nullptr)) report_fatal_error("unable to evaluate offset for variable '" + S.getName() + "'"); @@ -187,7 +187,7 @@ const MCSymbol *MCAsmLayout::getBaseSymbol(const MCSymbol &Symbol) const { const MCExpr *Expr = Symbol.getVariableValue(); MCValue Value; - if (!Expr->EvaluateAsValue(Value, this)) + if (!Expr->EvaluateAsValue(Value, this, nullptr)) llvm_unreachable("Invalid Expression"); const MCSymbolRefExpr *RefB = Value.getSymB(); @@ -438,11 +438,12 @@ const MCSymbolData *MCAssembler::getAtom(const MCSymbolData *SD) const { // a relocatable expr. // FIXME: Should this be the behavior of EvaluateAsRelocatable itself? static bool evaluate(const MCExpr &Expr, const MCAsmLayout &Layout, - MCValue &Target) { - if (Expr.EvaluateAsValue(Target, &Layout)) + const MCFixup &Fixup, MCValue &Target) { + if (Expr.EvaluateAsValue(Target, &Layout, &Fixup)) { if (Target.isAbsolute()) return true; - return Expr.EvaluateAsRelocatable(Target, &Layout); + } + return Expr.EvaluateAsRelocatable(Target, &Layout, &Fixup); } bool MCAssembler::evaluateFixup(const MCAsmLayout &Layout, @@ -454,7 +455,7 @@ bool MCAssembler::evaluateFixup(const MCAsmLayout &Layout, // probably merge the two into a single callback that tries to evaluate a // fixup and records a relocation if one is needed. const MCExpr *Expr = Fixup.getValue(); - if (!evaluate(*Expr, Layout, Target)) + if (!evaluate(*Expr, Layout, Fixup, Target)) getContext().FatalError(Fixup.getLoc(), "expected relocatable expression"); bool IsPCRel = Backend.getFixupKindInfo( diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp index f724716eacd..2d86ae7d493 100644 --- a/lib/MC/MCExpr.cpp +++ b/lib/MC/MCExpr.cpp @@ -482,8 +482,8 @@ bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm, // absolutize differences across sections and that is what the MachO writer // uses Addrs for. bool IsRelocatable = - EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs, /*InSet*/ Addrs, - /*ForceVarExpansion*/ false); + EvaluateAsRelocatableImpl(Value, Asm, Layout, nullptr, Addrs, + /*InSet*/ Addrs, /*ForceVarExpansion*/ false); // Record the current value. Res = Value.getConstant(); @@ -632,27 +632,31 @@ static bool EvaluateSymbolicAdd(const MCAssembler *Asm, } bool MCExpr::EvaluateAsRelocatable(MCValue &Res, - const MCAsmLayout *Layout) const { + const MCAsmLayout *Layout, + const MCFixup *Fixup) const { MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr; - return EvaluateAsRelocatableImpl(Res, Assembler, Layout, nullptr, false, - /*ForceVarExpansion*/ false); + return EvaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr, + false, /*ForceVarExpansion*/ false); } -bool MCExpr::EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout) const { +bool MCExpr::EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout, + const MCFixup *Fixup) const { MCAssembler *Assembler = Layout ? &Layout->getAssembler() : nullptr; - return EvaluateAsRelocatableImpl(Res, Assembler, Layout, nullptr, false, - /*ForceVarExpansion*/ true); + return EvaluateAsRelocatableImpl(Res, Assembler, Layout, Fixup, nullptr, + false, /*ForceVarExpansion*/ true); } bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, + const MCFixup *Fixup, const SectionAddrMap *Addrs, bool InSet, bool ForceVarExpansion) const { ++stats::MCExprEvaluate; switch (getKind()) { case Target: - return cast(this)->EvaluateAsRelocatableImpl(Res, Layout); + return cast(this)->EvaluateAsRelocatableImpl(Res, Layout, + Fixup); case Constant: Res = MCValue::get(cast(this)->getValue()); @@ -666,7 +670,7 @@ bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, // Evaluate recursively if this is a variable. if (Sym.isVariable() && SRE->getKind() == MCSymbolRefExpr::VK_None) { if (Sym.getVariableValue()->EvaluateAsRelocatableImpl( - Res, Asm, Layout, Addrs, true, ForceVarExpansion)) { + Res, Asm, Layout, Fixup, Addrs, true, ForceVarExpansion)) { const MCSymbolRefExpr *A = Res.getSymA(); const MCSymbolRefExpr *B = Res.getSymB(); @@ -697,8 +701,9 @@ bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCUnaryExpr *AUE = cast(this); MCValue Value; - if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout, Addrs, - InSet, ForceVarExpansion)) + if (!AUE->getSubExpr()->EvaluateAsRelocatableImpl(Value, Asm, Layout, + Fixup, Addrs, InSet, + ForceVarExpansion)) return false; switch (AUE->getOpcode()) { @@ -731,10 +736,12 @@ bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCBinaryExpr *ABE = cast(this); MCValue LHSValue, RHSValue; - if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout, Addrs, - InSet, ForceVarExpansion) || - !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout, Addrs, - InSet, ForceVarExpansion)) + if (!ABE->getLHS()->EvaluateAsRelocatableImpl(LHSValue, Asm, Layout, + Fixup, Addrs, InSet, + ForceVarExpansion) || + !ABE->getRHS()->EvaluateAsRelocatableImpl(RHSValue, Asm, Layout, + Fixup, Addrs, InSet, + ForceVarExpansion)) return false; // We only support a few operations on non-constant expressions, handle diff --git a/lib/MC/MachObjectWriter.cpp b/lib/MC/MachObjectWriter.cpp index 5214398bbcf..95b92485eb6 100644 --- a/lib/MC/MachObjectWriter.cpp +++ b/lib/MC/MachObjectWriter.cpp @@ -84,7 +84,7 @@ uint64_t MachObjectWriter::getSymbolAddress(const MCSymbolData* SD, MCValue Target; - if (!S.getVariableValue()->EvaluateAsRelocatable(Target, &Layout)) + if (!S.getVariableValue()->EvaluateAsRelocatable(Target, &Layout, nullptr)) report_fatal_error("unable to evaluate offset for variable '" + S.getName() + "'"); @@ -664,7 +664,7 @@ void MachObjectWriter::markAbsoluteVariableSymbols(MCAssembler &Asm, // and neither symbol is external, mark the variable as absolute. const MCExpr *Expr = SD.getSymbol().getVariableValue(); MCValue Value; - if (Expr->EvaluateAsRelocatable(Value, &Layout)) { + if (Expr->EvaluateAsRelocatable(Value, &Layout, nullptr)) { if (Value.getSymA() && Value.getSymB()) const_cast(&SD.getSymbol())->setAbsolute(); } diff --git a/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp b/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp index 42a6787da48..e396df82197 100644 --- a/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp +++ b/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp @@ -90,8 +90,9 @@ const MCSection *AArch64MCExpr::FindAssociatedSection() const { } bool AArch64MCExpr::EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const { - if (!getSubExpr()->EvaluateAsRelocatable(Res, Layout)) + const MCAsmLayout *Layout, + const MCFixup *Fixup) const { + if (!getSubExpr()->EvaluateAsRelocatable(Res, Layout, Fixup)) return false; Res = diff --git a/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h b/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h index 5422f9d7067..9c166a626a6 100644 --- a/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h +++ b/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h @@ -152,7 +152,8 @@ public: const MCSection *FindAssociatedSection() const override; bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const override; + const MCAsmLayout *Layout, + const MCFixup *Fixup) const override; void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override; diff --git a/lib/Target/AArch64/MCTargetDesc/AArch64MachObjectWriter.cpp b/lib/Target/AArch64/MCTargetDesc/AArch64MachObjectWriter.cpp index 6c80884776f..e12a24be0a6 100644 --- a/lib/Target/AArch64/MCTargetDesc/AArch64MachObjectWriter.cpp +++ b/lib/Target/AArch64/MCTargetDesc/AArch64MachObjectWriter.cpp @@ -288,7 +288,8 @@ void AArch64MachObjectWriter::RecordRelocation( // FIXME: Will the Target we already have ever have any data in it // we need to preserve and merge with the new Target? How about // the FixedValue? - if (!Symbol->getVariableValue()->EvaluateAsRelocatable(Target, &Layout)) + if (!Symbol->getVariableValue()->EvaluateAsRelocatable(Target, &Layout, + &Fixup)) Asm.getContext().FatalError(Fixup.getLoc(), "unable to resolve variable '" + Symbol->getName() + "'"); diff --git a/lib/Target/ARM/MCTargetDesc/ARMMCExpr.cpp b/lib/Target/ARM/MCTargetDesc/ARMMCExpr.cpp index e545e3c2f30..68d32b27fd7 100644 --- a/lib/Target/ARM/MCTargetDesc/ARMMCExpr.cpp +++ b/lib/Target/ARM/MCTargetDesc/ARMMCExpr.cpp @@ -35,12 +35,6 @@ void ARMMCExpr::PrintImpl(raw_ostream &OS) const { OS << ')'; } -bool -ARMMCExpr::EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const { - return false; -} - void ARMMCExpr::visitUsedExpr(MCStreamer &Streamer) const { Streamer.visitUsedExpr(*getSubExpr()); } diff --git a/lib/Target/ARM/MCTargetDesc/ARMMCExpr.h b/lib/Target/ARM/MCTargetDesc/ARMMCExpr.h index c5c0b10f8ad..2b8c9cb409c 100644 --- a/lib/Target/ARM/MCTargetDesc/ARMMCExpr.h +++ b/lib/Target/ARM/MCTargetDesc/ARMMCExpr.h @@ -58,8 +58,11 @@ public: void PrintImpl(raw_ostream &OS) const override; bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const override; - void visitUsedExpr(MCStreamer &Streamer) const override; + const MCAsmLayout *Layout, + const MCFixup *Fixup) const override { + return false; + } + void visitUsedExpr(MCStreamer &Streamer) const override; const MCSection *FindAssociatedSection() const override { return getSubExpr()->FindAssociatedSection(); } diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp index 5bba3e5b7ae..74490f334b3 100644 --- a/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp +++ b/lib/Target/Mips/MCTargetDesc/MipsMCExpr.cpp @@ -80,8 +80,9 @@ void MipsMCExpr::PrintImpl(raw_ostream &OS) const { bool MipsMCExpr::EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const { - return getSubExpr()->EvaluateAsRelocatable(Res, Layout); + const MCAsmLayout *Layout, + const MCFixup *Fixup) const { + return getSubExpr()->EvaluateAsRelocatable(Res, Layout, Fixup); } void MipsMCExpr::visitUsedExpr(MCStreamer &Streamer) const { diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h b/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h index f193dc9b9d5..afd1ce45b61 100644 --- a/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h +++ b/lib/Target/Mips/MCTargetDesc/MipsMCExpr.h @@ -48,7 +48,8 @@ public: void PrintImpl(raw_ostream &OS) const override; bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const override; + const MCAsmLayout *Layout, + const MCFixup *Fixup) const override; void visitUsedExpr(MCStreamer &Streamer) const override; const MCSection *FindAssociatedSection() const override { return getSubExpr()->FindAssociatedSection(); diff --git a/lib/Target/NVPTX/NVPTXMCExpr.h b/lib/Target/NVPTX/NVPTXMCExpr.h index 554764930a9..153f8acf2cf 100644 --- a/lib/Target/NVPTX/NVPTXMCExpr.h +++ b/lib/Target/NVPTX/NVPTXMCExpr.h @@ -63,7 +63,8 @@ public: void PrintImpl(raw_ostream &OS) const override; bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const override { + const MCAsmLayout *Layout, + const MCFixup *Fixup) const override { return false; } void visitUsedExpr(MCStreamer &Streamer) const override {}; diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp b/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp index 3ac0aca6b78..e8512cd2332 100644 --- a/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp +++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp @@ -53,10 +53,11 @@ void PPCMCExpr::PrintImpl(raw_ostream &OS) const { bool PPCMCExpr::EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const { + const MCAsmLayout *Layout, + const MCFixup *Fixup) const { MCValue Value; - if (!getSubExpr()->EvaluateAsRelocatable(Value, Layout)) + if (!getSubExpr()->EvaluateAsRelocatable(Value, Layout, Fixup)) return false; if (Value.isAbsolute()) { diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h b/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h index bca408507e7..f9baf5de5a0 100644 --- a/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h +++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h @@ -78,7 +78,8 @@ public: void PrintImpl(raw_ostream &OS) const override; bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const override; + const MCAsmLayout *Layout, + const MCFixup *Fixup) const override; void visitUsedExpr(MCStreamer &Streamer) const override; const MCSection *FindAssociatedSection() const override { return getSubExpr()->FindAssociatedSection(); diff --git a/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp b/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp index 7f01ab06879..d97e3a25c5a 100644 --- a/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp +++ b/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.cpp @@ -161,8 +161,9 @@ Sparc::Fixups SparcMCExpr::getFixupKind(SparcMCExpr::VariantKind Kind) { bool SparcMCExpr::EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const { - return getSubExpr()->EvaluateAsRelocatable(Res, Layout); + const MCAsmLayout *Layout, + const MCFixup *Fixup) const { + return getSubExpr()->EvaluateAsRelocatable(Res, Layout, Fixup); } static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) { diff --git a/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.h b/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.h index f0d0ef363ad..5bd2a9a3697 100644 --- a/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.h +++ b/lib/Target/Sparc/MCTargetDesc/SparcMCExpr.h @@ -87,7 +87,8 @@ public: /// @} void PrintImpl(raw_ostream &OS) const override; bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const override; + const MCAsmLayout *Layout, + const MCFixup *Fixup) const override; void visitUsedExpr(MCStreamer &Streamer) const override; const MCSection *FindAssociatedSection() const override { return getSubExpr()->FindAssociatedSection();