| //===-- PPCMCTargetDesc.cpp - PowerPC Target Descriptions -----------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file provides PowerPC specific target descriptions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MCTargetDesc/PPCMCTargetDesc.h" |
| #include "InstPrinter/PPCInstPrinter.h" |
| #include "MCTargetDesc/PPCMCAsmInfo.h" |
| #include "PPCTargetStreamer.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/BinaryFormat/ELF.h" |
| #include "llvm/MC/MCAssembler.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCDwarf.h" |
| #include "llvm/MC/MCELFStreamer.h" |
| #include "llvm/MC/MCExpr.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCStreamer.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/MC/MCSymbol.h" |
| #include "llvm/MC/MCSymbolELF.h" |
| #include "llvm/Support/Casting.h" |
| #include "llvm/Support/CodeGen.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/FormattedStream.h" |
| #include "llvm/Support/TargetRegistry.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| |
| #define GET_INSTRINFO_MC_DESC |
| #include "PPCGenInstrInfo.inc" |
| |
| #define GET_SUBTARGETINFO_MC_DESC |
| #include "PPCGenSubtargetInfo.inc" |
| |
| #define GET_REGINFO_MC_DESC |
| #include "PPCGenRegisterInfo.inc" |
| |
| // Pin the vtable to this file. |
| PPCTargetStreamer::PPCTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {} |
| |
| PPCTargetStreamer::~PPCTargetStreamer() = default; |
| |
| static MCInstrInfo *createPPCMCInstrInfo() { |
| MCInstrInfo *X = new MCInstrInfo(); |
| InitPPCMCInstrInfo(X); |
| return X; |
| } |
| |
| static MCRegisterInfo *createPPCMCRegisterInfo(const Triple &TT) { |
| bool isPPC64 = |
| (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le); |
| unsigned Flavour = isPPC64 ? 0 : 1; |
| unsigned RA = isPPC64 ? PPC::LR8 : PPC::LR; |
| |
| MCRegisterInfo *X = new MCRegisterInfo(); |
| InitPPCMCRegisterInfo(X, RA, Flavour, Flavour); |
| return X; |
| } |
| |
| static MCSubtargetInfo *createPPCMCSubtargetInfo(const Triple &TT, |
| StringRef CPU, StringRef FS) { |
| return createPPCMCSubtargetInfoImpl(TT, CPU, FS); |
| } |
| |
| static MCAsmInfo *createPPCMCAsmInfo(const MCRegisterInfo &MRI, |
| const Triple &TheTriple) { |
| bool isPPC64 = (TheTriple.getArch() == Triple::ppc64 || |
| TheTriple.getArch() == Triple::ppc64le); |
| |
| MCAsmInfo *MAI; |
| if (TheTriple.isOSDarwin()) |
| MAI = new PPCMCAsmInfoDarwin(isPPC64, TheTriple); |
| else |
| MAI = new PPCELFMCAsmInfo(isPPC64, TheTriple); |
| |
| // Initial state of the frame pointer is R1. |
| unsigned Reg = isPPC64 ? PPC::X1 : PPC::R1; |
| MCCFIInstruction Inst = |
| MCCFIInstruction::createDefCfa(nullptr, MRI.getDwarfRegNum(Reg, true), 0); |
| MAI->addInitialFrameState(Inst); |
| |
| return MAI; |
| } |
| |
| namespace { |
| |
| class PPCTargetAsmStreamer : public PPCTargetStreamer { |
| formatted_raw_ostream &OS; |
| |
| public: |
| PPCTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS) |
| : PPCTargetStreamer(S), OS(OS) {} |
| |
| void emitTCEntry(const MCSymbol &S) override { |
| OS << "\t.tc "; |
| OS << S.getName(); |
| OS << "[TC],"; |
| OS << S.getName(); |
| OS << '\n'; |
| } |
| |
| void emitMachine(StringRef CPU) override { |
| OS << "\t.machine " << CPU << '\n'; |
| } |
| |
| void emitAbiVersion(int AbiVersion) override { |
| OS << "\t.abiversion " << AbiVersion << '\n'; |
| } |
| |
| void emitLocalEntry(MCSymbolELF *S, const MCExpr *LocalOffset) override { |
| const MCAsmInfo *MAI = Streamer.getContext().getAsmInfo(); |
| |
| OS << "\t.localentry\t"; |
| S->print(OS, MAI); |
| OS << ", "; |
| LocalOffset->print(OS, MAI); |
| OS << '\n'; |
| } |
| }; |
| |
| class PPCTargetELFStreamer : public PPCTargetStreamer { |
| public: |
| PPCTargetELFStreamer(MCStreamer &S) : PPCTargetStreamer(S) {} |
| |
| MCELFStreamer &getStreamer() { |
| return static_cast<MCELFStreamer &>(Streamer); |
| } |
| |
| void emitTCEntry(const MCSymbol &S) override { |
| // Creates a R_PPC64_TOC relocation |
| Streamer.EmitValueToAlignment(8); |
| Streamer.EmitSymbolValue(&S, 8); |
| } |
| |
| void emitMachine(StringRef CPU) override { |
| // FIXME: Is there anything to do in here or does this directive only |
| // limit the parser? |
| } |
| |
| void emitAbiVersion(int AbiVersion) override { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| Flags &= ~ELF::EF_PPC64_ABI; |
| Flags |= (AbiVersion & ELF::EF_PPC64_ABI); |
| MCA.setELFHeaderEFlags(Flags); |
| } |
| |
| void emitLocalEntry(MCSymbolELF *S, const MCExpr *LocalOffset) override { |
| MCAssembler &MCA = getStreamer().getAssembler(); |
| |
| int64_t Res; |
| if (!LocalOffset->evaluateAsAbsolute(Res, MCA)) |
| report_fatal_error(".localentry expression must be absolute."); |
| |
| unsigned Encoded = ELF::encodePPC64LocalEntryOffset(Res); |
| if (Res != ELF::decodePPC64LocalEntryOffset(Encoded)) |
| report_fatal_error(".localentry expression cannot be encoded."); |
| |
| unsigned Other = S->getOther(); |
| Other &= ~ELF::STO_PPC64_LOCAL_MASK; |
| Other |= Encoded; |
| S->setOther(Other); |
| |
| // For GAS compatibility, unless we already saw a .abiversion directive, |
| // set e_flags to indicate ELFv2 ABI. |
| unsigned Flags = MCA.getELFHeaderEFlags(); |
| if ((Flags & ELF::EF_PPC64_ABI) == 0) |
| MCA.setELFHeaderEFlags(Flags | 2); |
| } |
| |
| void emitAssignment(MCSymbol *S, const MCExpr *Value) override { |
| auto *Symbol = cast<MCSymbolELF>(S); |
| // When encoding an assignment to set symbol A to symbol B, also copy |
| // the st_other bits encoding the local entry point offset. |
| if (Value->getKind() != MCExpr::SymbolRef) |
| return; |
| const auto &RhsSym = cast<MCSymbolELF>( |
| static_cast<const MCSymbolRefExpr *>(Value)->getSymbol()); |
| unsigned Other = Symbol->getOther(); |
| Other &= ~ELF::STO_PPC64_LOCAL_MASK; |
| Other |= RhsSym.getOther() & ELF::STO_PPC64_LOCAL_MASK; |
| Symbol->setOther(Other); |
| } |
| }; |
| |
| class PPCTargetMachOStreamer : public PPCTargetStreamer { |
| public: |
| PPCTargetMachOStreamer(MCStreamer &S) : PPCTargetStreamer(S) {} |
| |
| void emitTCEntry(const MCSymbol &S) override { |
| llvm_unreachable("Unknown pseudo-op: .tc"); |
| } |
| |
| void emitMachine(StringRef CPU) override { |
| // FIXME: We should update the CPUType, CPUSubType in the Object file if |
| // the new values are different from the defaults. |
| } |
| |
| void emitAbiVersion(int AbiVersion) override { |
| llvm_unreachable("Unknown pseudo-op: .abiversion"); |
| } |
| |
| void emitLocalEntry(MCSymbolELF *S, const MCExpr *LocalOffset) override { |
| llvm_unreachable("Unknown pseudo-op: .localentry"); |
| } |
| }; |
| |
| } // end anonymous namespace |
| |
| static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S, |
| formatted_raw_ostream &OS, |
| MCInstPrinter *InstPrint, |
| bool isVerboseAsm) { |
| return new PPCTargetAsmStreamer(S, OS); |
| } |
| |
| static MCTargetStreamer * |
| createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) { |
| const Triple &TT = STI.getTargetTriple(); |
| if (TT.isOSBinFormatELF()) |
| return new PPCTargetELFStreamer(S); |
| return new PPCTargetMachOStreamer(S); |
| } |
| |
| static MCInstPrinter *createPPCMCInstPrinter(const Triple &T, |
| unsigned SyntaxVariant, |
| const MCAsmInfo &MAI, |
| const MCInstrInfo &MII, |
| const MCRegisterInfo &MRI) { |
| return new PPCInstPrinter(MAI, MII, MRI, T); |
| } |
| |
| extern "C" void LLVMInitializePowerPCTargetMC() { |
| for (Target *T : |
| {&getThePPC32Target(), &getThePPC64Target(), &getThePPC64LETarget()}) { |
| // Register the MC asm info. |
| RegisterMCAsmInfoFn C(*T, createPPCMCAsmInfo); |
| |
| // Register the MC instruction info. |
| TargetRegistry::RegisterMCInstrInfo(*T, createPPCMCInstrInfo); |
| |
| // Register the MC register info. |
| TargetRegistry::RegisterMCRegInfo(*T, createPPCMCRegisterInfo); |
| |
| // Register the MC subtarget info. |
| TargetRegistry::RegisterMCSubtargetInfo(*T, createPPCMCSubtargetInfo); |
| |
| // Register the MC Code Emitter |
| TargetRegistry::RegisterMCCodeEmitter(*T, createPPCMCCodeEmitter); |
| |
| // Register the asm backend. |
| TargetRegistry::RegisterMCAsmBackend(*T, createPPCAsmBackend); |
| |
| // Register the object target streamer. |
| TargetRegistry::RegisterObjectTargetStreamer(*T, |
| createObjectTargetStreamer); |
| |
| // Register the asm target streamer. |
| TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer); |
| |
| // Register the MCInstPrinter. |
| TargetRegistry::RegisterMCInstPrinter(*T, createPPCMCInstPrinter); |
| } |
| } |