| //===-- ARMMCTargetDesc.cpp - ARM Target Descriptions ---------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file provides ARM specific target descriptions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "ARMMCTargetDesc.h" |
| #include "ARMAddressingModes.h" |
| #include "ARMBaseInfo.h" |
| #include "ARMInstPrinter.h" |
| #include "ARMMCAsmInfo.h" |
| #include "TargetInfo/ARMTargetInfo.h" |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/DebugInfo/CodeView/CodeView.h" |
| #include "llvm/MC/MCAsmBackend.h" |
| #include "llvm/MC/MCCodeEmitter.h" |
| #include "llvm/MC/MCELFStreamer.h" |
| #include "llvm/MC/MCInstrAnalysis.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCObjectWriter.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCStreamer.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/MC/TargetRegistry.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/TargetParser.h" |
| |
| using namespace llvm; |
| |
| #define GET_REGINFO_MC_DESC |
| #include "ARMGenRegisterInfo.inc" |
| |
| static bool getMCRDeprecationInfo(MCInst &MI, const MCSubtargetInfo &STI, |
| std::string &Info) { |
| if (STI.getFeatureBits()[llvm::ARM::HasV7Ops] && |
| (MI.getOperand(0).isImm() && MI.getOperand(0).getImm() == 15) && |
| (MI.getOperand(1).isImm() && MI.getOperand(1).getImm() == 0) && |
| // Checks for the deprecated CP15ISB encoding: |
| // mcr p15, #0, rX, c7, c5, #4 |
| (MI.getOperand(3).isImm() && MI.getOperand(3).getImm() == 7)) { |
| if ((MI.getOperand(5).isImm() && MI.getOperand(5).getImm() == 4)) { |
| if (MI.getOperand(4).isImm() && MI.getOperand(4).getImm() == 5) { |
| Info = "deprecated since v7, use 'isb'"; |
| return true; |
| } |
| |
| // Checks for the deprecated CP15DSB encoding: |
| // mcr p15, #0, rX, c7, c10, #4 |
| if (MI.getOperand(4).isImm() && MI.getOperand(4).getImm() == 10) { |
| Info = "deprecated since v7, use 'dsb'"; |
| return true; |
| } |
| } |
| // Checks for the deprecated CP15DMB encoding: |
| // mcr p15, #0, rX, c7, c10, #5 |
| if (MI.getOperand(4).isImm() && MI.getOperand(4).getImm() == 10 && |
| (MI.getOperand(5).isImm() && MI.getOperand(5).getImm() == 5)) { |
| Info = "deprecated since v7, use 'dmb'"; |
| return true; |
| } |
| } |
| if (STI.getFeatureBits()[llvm::ARM::HasV7Ops] && |
| ((MI.getOperand(0).isImm() && MI.getOperand(0).getImm() == 10) || |
| (MI.getOperand(0).isImm() && MI.getOperand(0).getImm() == 11))) { |
| Info = "since v7, cp10 and cp11 are reserved for advanced SIMD or floating " |
| "point instructions"; |
| return true; |
| } |
| return false; |
| } |
| |
| static bool getMRCDeprecationInfo(MCInst &MI, const MCSubtargetInfo &STI, |
| std::string &Info) { |
| if (STI.getFeatureBits()[llvm::ARM::HasV7Ops] && |
| ((MI.getOperand(0).isImm() && MI.getOperand(0).getImm() == 10) || |
| (MI.getOperand(0).isImm() && MI.getOperand(0).getImm() == 11))) { |
| Info = "since v7, cp10 and cp11 are reserved for advanced SIMD or floating " |
| "point instructions"; |
| return true; |
| } |
| return false; |
| } |
| |
| static bool getARMStoreDeprecationInfo(MCInst &MI, const MCSubtargetInfo &STI, |
| std::string &Info) { |
| assert(!STI.getFeatureBits()[llvm::ARM::ModeThumb] && |
| "cannot predicate thumb instructions"); |
| |
| assert(MI.getNumOperands() >= 4 && "expected >= 4 arguments"); |
| for (unsigned OI = 4, OE = MI.getNumOperands(); OI < OE; ++OI) { |
| assert(MI.getOperand(OI).isReg() && "expected register"); |
| if (MI.getOperand(OI).getReg() == ARM::PC) { |
| Info = "use of PC in the list is deprecated"; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static bool getARMLoadDeprecationInfo(MCInst &MI, const MCSubtargetInfo &STI, |
| std::string &Info) { |
| assert(!STI.getFeatureBits()[llvm::ARM::ModeThumb] && |
| "cannot predicate thumb instructions"); |
| |
| assert(MI.getNumOperands() >= 4 && "expected >= 4 arguments"); |
| bool ListContainsPC = false, ListContainsLR = false; |
| for (unsigned OI = 4, OE = MI.getNumOperands(); OI < OE; ++OI) { |
| assert(MI.getOperand(OI).isReg() && "expected register"); |
| switch (MI.getOperand(OI).getReg()) { |
| default: |
| break; |
| case ARM::LR: |
| ListContainsLR = true; |
| break; |
| case ARM::PC: |
| ListContainsPC = true; |
| break; |
| } |
| } |
| |
| if (ListContainsPC && ListContainsLR) { |
| Info = "use of LR and PC simultaneously in the list is deprecated"; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| #define GET_INSTRINFO_MC_DESC |
| #define ENABLE_INSTR_PREDICATE_VERIFIER |
| #include "ARMGenInstrInfo.inc" |
| |
| #define GET_SUBTARGETINFO_MC_DESC |
| #include "ARMGenSubtargetInfo.inc" |
| |
| std::string ARM_MC::ParseARMTriple(const Triple &TT, StringRef CPU) { |
| std::string ARMArchFeature; |
| |
| ARM::ArchKind ArchID = ARM::parseArch(TT.getArchName()); |
| if (ArchID != ARM::ArchKind::INVALID && (CPU.empty() || CPU == "generic")) |
| ARMArchFeature = (ARMArchFeature + "+" + ARM::getArchName(ArchID)).str(); |
| |
| if (TT.isThumb()) { |
| if (!ARMArchFeature.empty()) |
| ARMArchFeature += ","; |
| ARMArchFeature += "+thumb-mode,+v4t"; |
| } |
| |
| if (TT.isOSNaCl()) { |
| if (!ARMArchFeature.empty()) |
| ARMArchFeature += ","; |
| ARMArchFeature += "+nacl-trap"; |
| } |
| |
| if (TT.isOSWindows()) { |
| if (!ARMArchFeature.empty()) |
| ARMArchFeature += ","; |
| ARMArchFeature += "+noarm"; |
| } |
| |
| return ARMArchFeature; |
| } |
| |
| bool ARM_MC::isPredicated(const MCInst &MI, const MCInstrInfo *MCII) { |
| const MCInstrDesc &Desc = MCII->get(MI.getOpcode()); |
| int PredOpIdx = Desc.findFirstPredOperandIdx(); |
| return PredOpIdx != -1 && MI.getOperand(PredOpIdx).getImm() != ARMCC::AL; |
| } |
| |
| bool ARM_MC::isCPSRDefined(const MCInst &MI, const MCInstrInfo *MCII) { |
| const MCInstrDesc &Desc = MCII->get(MI.getOpcode()); |
| for (unsigned I = 0; I < MI.getNumOperands(); ++I) { |
| const MCOperand &MO = MI.getOperand(I); |
| if (MO.isReg() && MO.getReg() == ARM::CPSR && |
| Desc.operands()[I].isOptionalDef()) |
| return true; |
| } |
| return false; |
| } |
| |
| uint64_t ARM_MC::evaluateBranchTarget(const MCInstrDesc &InstDesc, |
| uint64_t Addr, int64_t Imm) { |
| // For ARM instructions the PC offset is 8 bytes, for Thumb instructions it |
| // is 4 bytes. |
| uint64_t Offset = |
| ((InstDesc.TSFlags & ARMII::FormMask) == ARMII::ThumbFrm) ? 4 : 8; |
| |
| // A Thumb instruction BLX(i) can be 16-bit aligned while targets Arm code |
| // which is 32-bit aligned. The target address for the case is calculated as |
| // targetAddress = Align(PC,4) + imm32; |
| // where |
| // Align(x, y) = y * (x DIV y); |
| if (InstDesc.getOpcode() == ARM::tBLXi) |
| Addr &= ~0x3; |
| |
| return Addr + Imm + Offset; |
| } |
| |
| MCSubtargetInfo *ARM_MC::createARMMCSubtargetInfo(const Triple &TT, |
| StringRef CPU, StringRef FS) { |
| std::string ArchFS = ARM_MC::ParseARMTriple(TT, CPU); |
| if (!FS.empty()) { |
| if (!ArchFS.empty()) |
| ArchFS = (Twine(ArchFS) + "," + FS).str(); |
| else |
| ArchFS = std::string(FS); |
| } |
| |
| return createARMMCSubtargetInfoImpl(TT, CPU, /*TuneCPU*/ CPU, ArchFS); |
| } |
| |
| static MCInstrInfo *createARMMCInstrInfo() { |
| MCInstrInfo *X = new MCInstrInfo(); |
| InitARMMCInstrInfo(X); |
| return X; |
| } |
| |
| void ARM_MC::initLLVMToCVRegMapping(MCRegisterInfo *MRI) { |
| // Mapping from CodeView to MC register id. |
| static const struct { |
| codeview::RegisterId CVReg; |
| MCPhysReg Reg; |
| } RegMap[] = { |
| {codeview::RegisterId::ARM_R0, ARM::R0}, |
| {codeview::RegisterId::ARM_R1, ARM::R1}, |
| {codeview::RegisterId::ARM_R2, ARM::R2}, |
| {codeview::RegisterId::ARM_R3, ARM::R3}, |
| {codeview::RegisterId::ARM_R4, ARM::R4}, |
| {codeview::RegisterId::ARM_R5, ARM::R5}, |
| {codeview::RegisterId::ARM_R6, ARM::R6}, |
| {codeview::RegisterId::ARM_R7, ARM::R7}, |
| {codeview::RegisterId::ARM_R8, ARM::R8}, |
| {codeview::RegisterId::ARM_R9, ARM::R9}, |
| {codeview::RegisterId::ARM_R10, ARM::R10}, |
| {codeview::RegisterId::ARM_R11, ARM::R11}, |
| {codeview::RegisterId::ARM_R12, ARM::R12}, |
| {codeview::RegisterId::ARM_SP, ARM::SP}, |
| {codeview::RegisterId::ARM_LR, ARM::LR}, |
| {codeview::RegisterId::ARM_PC, ARM::PC}, |
| {codeview::RegisterId::ARM_CPSR, ARM::CPSR}, |
| {codeview::RegisterId::ARM_FPSCR, ARM::FPSCR}, |
| {codeview::RegisterId::ARM_FPEXC, ARM::FPEXC}, |
| {codeview::RegisterId::ARM_FS0, ARM::S0}, |
| {codeview::RegisterId::ARM_FS1, ARM::S1}, |
| {codeview::RegisterId::ARM_FS2, ARM::S2}, |
| {codeview::RegisterId::ARM_FS3, ARM::S3}, |
| {codeview::RegisterId::ARM_FS4, ARM::S4}, |
| {codeview::RegisterId::ARM_FS5, ARM::S5}, |
| {codeview::RegisterId::ARM_FS6, ARM::S6}, |
| {codeview::RegisterId::ARM_FS7, ARM::S7}, |
| {codeview::RegisterId::ARM_FS8, ARM::S8}, |
| {codeview::RegisterId::ARM_FS9, ARM::S9}, |
| {codeview::RegisterId::ARM_FS10, ARM::S10}, |
| {codeview::RegisterId::ARM_FS11, ARM::S11}, |
| {codeview::RegisterId::ARM_FS12, ARM::S12}, |
| {codeview::RegisterId::ARM_FS13, ARM::S13}, |
| {codeview::RegisterId::ARM_FS14, ARM::S14}, |
| {codeview::RegisterId::ARM_FS15, ARM::S15}, |
| {codeview::RegisterId::ARM_FS16, ARM::S16}, |
| {codeview::RegisterId::ARM_FS17, ARM::S17}, |
| {codeview::RegisterId::ARM_FS18, ARM::S18}, |
| {codeview::RegisterId::ARM_FS19, ARM::S19}, |
| {codeview::RegisterId::ARM_FS20, ARM::S20}, |
| {codeview::RegisterId::ARM_FS21, ARM::S21}, |
| {codeview::RegisterId::ARM_FS22, ARM::S22}, |
| {codeview::RegisterId::ARM_FS23, ARM::S23}, |
| {codeview::RegisterId::ARM_FS24, ARM::S24}, |
| {codeview::RegisterId::ARM_FS25, ARM::S25}, |
| {codeview::RegisterId::ARM_FS26, ARM::S26}, |
| {codeview::RegisterId::ARM_FS27, ARM::S27}, |
| {codeview::RegisterId::ARM_FS28, ARM::S28}, |
| {codeview::RegisterId::ARM_FS29, ARM::S29}, |
| {codeview::RegisterId::ARM_FS30, ARM::S30}, |
| {codeview::RegisterId::ARM_FS31, ARM::S31}, |
| {codeview::RegisterId::ARM_ND0, ARM::D0}, |
| {codeview::RegisterId::ARM_ND1, ARM::D1}, |
| {codeview::RegisterId::ARM_ND2, ARM::D2}, |
| {codeview::RegisterId::ARM_ND3, ARM::D3}, |
| {codeview::RegisterId::ARM_ND4, ARM::D4}, |
| {codeview::RegisterId::ARM_ND5, ARM::D5}, |
| {codeview::RegisterId::ARM_ND6, ARM::D6}, |
| {codeview::RegisterId::ARM_ND7, ARM::D7}, |
| {codeview::RegisterId::ARM_ND8, ARM::D8}, |
| {codeview::RegisterId::ARM_ND9, ARM::D9}, |
| {codeview::RegisterId::ARM_ND10, ARM::D10}, |
| {codeview::RegisterId::ARM_ND11, ARM::D11}, |
| {codeview::RegisterId::ARM_ND12, ARM::D12}, |
| {codeview::RegisterId::ARM_ND13, ARM::D13}, |
| {codeview::RegisterId::ARM_ND14, ARM::D14}, |
| {codeview::RegisterId::ARM_ND15, ARM::D15}, |
| {codeview::RegisterId::ARM_ND16, ARM::D16}, |
| {codeview::RegisterId::ARM_ND17, ARM::D17}, |
| {codeview::RegisterId::ARM_ND18, ARM::D18}, |
| {codeview::RegisterId::ARM_ND19, ARM::D19}, |
| {codeview::RegisterId::ARM_ND20, ARM::D20}, |
| {codeview::RegisterId::ARM_ND21, ARM::D21}, |
| {codeview::RegisterId::ARM_ND22, ARM::D22}, |
| {codeview::RegisterId::ARM_ND23, ARM::D23}, |
| {codeview::RegisterId::ARM_ND24, ARM::D24}, |
| {codeview::RegisterId::ARM_ND25, ARM::D25}, |
| {codeview::RegisterId::ARM_ND26, ARM::D26}, |
| {codeview::RegisterId::ARM_ND27, ARM::D27}, |
| {codeview::RegisterId::ARM_ND28, ARM::D28}, |
| {codeview::RegisterId::ARM_ND29, ARM::D29}, |
| {codeview::RegisterId::ARM_ND30, ARM::D30}, |
| {codeview::RegisterId::ARM_ND31, ARM::D31}, |
| {codeview::RegisterId::ARM_NQ0, ARM::Q0}, |
| {codeview::RegisterId::ARM_NQ1, ARM::Q1}, |
| {codeview::RegisterId::ARM_NQ2, ARM::Q2}, |
| {codeview::RegisterId::ARM_NQ3, ARM::Q3}, |
| {codeview::RegisterId::ARM_NQ4, ARM::Q4}, |
| {codeview::RegisterId::ARM_NQ5, ARM::Q5}, |
| {codeview::RegisterId::ARM_NQ6, ARM::Q6}, |
| {codeview::RegisterId::ARM_NQ7, ARM::Q7}, |
| {codeview::RegisterId::ARM_NQ8, ARM::Q8}, |
| {codeview::RegisterId::ARM_NQ9, ARM::Q9}, |
| {codeview::RegisterId::ARM_NQ10, ARM::Q10}, |
| {codeview::RegisterId::ARM_NQ11, ARM::Q11}, |
| {codeview::RegisterId::ARM_NQ12, ARM::Q12}, |
| {codeview::RegisterId::ARM_NQ13, ARM::Q13}, |
| {codeview::RegisterId::ARM_NQ14, ARM::Q14}, |
| {codeview::RegisterId::ARM_NQ15, ARM::Q15}, |
| }; |
| for (const auto &I : RegMap) |
| MRI->mapLLVMRegToCVReg(I.Reg, static_cast<int>(I.CVReg)); |
| } |
| |
| static MCRegisterInfo *createARMMCRegisterInfo(const Triple &Triple) { |
| MCRegisterInfo *X = new MCRegisterInfo(); |
| InitARMMCRegisterInfo(X, ARM::LR, 0, 0, ARM::PC); |
| ARM_MC::initLLVMToCVRegMapping(X); |
| return X; |
| } |
| |
| static MCAsmInfo *createARMMCAsmInfo(const MCRegisterInfo &MRI, |
| const Triple &TheTriple, |
| const MCTargetOptions &Options) { |
| MCAsmInfo *MAI; |
| if (TheTriple.isOSDarwin() || TheTriple.isOSBinFormatMachO()) |
| MAI = new ARMMCAsmInfoDarwin(TheTriple); |
| else if (TheTriple.isWindowsMSVCEnvironment()) |
| MAI = new ARMCOFFMCAsmInfoMicrosoft(); |
| else if (TheTriple.isOSWindows()) |
| MAI = new ARMCOFFMCAsmInfoGNU(); |
| else |
| MAI = new ARMELFMCAsmInfo(TheTriple); |
| |
| unsigned Reg = MRI.getDwarfRegNum(ARM::SP, true); |
| MAI->addInitialFrameState(MCCFIInstruction::cfiDefCfa(nullptr, Reg, 0)); |
| |
| return MAI; |
| } |
| |
| static MCStreamer *createELFStreamer(const Triple &T, MCContext &Ctx, |
| std::unique_ptr<MCAsmBackend> &&MAB, |
| std::unique_ptr<MCObjectWriter> &&OW, |
| std::unique_ptr<MCCodeEmitter> &&Emitter, |
| bool RelaxAll) { |
| return createARMELFStreamer( |
| Ctx, std::move(MAB), std::move(OW), std::move(Emitter), false, |
| (T.getArch() == Triple::thumb || T.getArch() == Triple::thumbeb), |
| T.isAndroid()); |
| } |
| |
| static MCStreamer * |
| createARMMachOStreamer(MCContext &Ctx, std::unique_ptr<MCAsmBackend> &&MAB, |
| std::unique_ptr<MCObjectWriter> &&OW, |
| std::unique_ptr<MCCodeEmitter> &&Emitter, bool RelaxAll, |
| bool DWARFMustBeAtTheEnd) { |
| return createMachOStreamer(Ctx, std::move(MAB), std::move(OW), |
| std::move(Emitter), false, DWARFMustBeAtTheEnd); |
| } |
| |
| static MCInstPrinter *createARMMCInstPrinter(const Triple &T, |
| unsigned SyntaxVariant, |
| const MCAsmInfo &MAI, |
| const MCInstrInfo &MII, |
| const MCRegisterInfo &MRI) { |
| if (SyntaxVariant == 0) |
| return new ARMInstPrinter(MAI, MII, MRI); |
| return nullptr; |
| } |
| |
| static MCRelocationInfo *createARMMCRelocationInfo(const Triple &TT, |
| MCContext &Ctx) { |
| if (TT.isOSBinFormatMachO()) |
| return createARMMachORelocationInfo(Ctx); |
| // Default to the stock relocation info. |
| return llvm::createMCRelocationInfo(TT, Ctx); |
| } |
| |
| namespace { |
| |
| class ARMMCInstrAnalysis : public MCInstrAnalysis { |
| public: |
| ARMMCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {} |
| |
| bool isUnconditionalBranch(const MCInst &Inst) const override { |
| // BCCs with the "always" predicate are unconditional branches. |
| if (Inst.getOpcode() == ARM::Bcc && Inst.getOperand(1).getImm()==ARMCC::AL) |
| return true; |
| return MCInstrAnalysis::isUnconditionalBranch(Inst); |
| } |
| |
| bool isConditionalBranch(const MCInst &Inst) const override { |
| // BCCs with the "always" predicate are unconditional branches. |
| if (Inst.getOpcode() == ARM::Bcc && Inst.getOperand(1).getImm()==ARMCC::AL) |
| return false; |
| return MCInstrAnalysis::isConditionalBranch(Inst); |
| } |
| |
| bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size, |
| uint64_t &Target) const override { |
| const MCInstrDesc &Desc = Info->get(Inst.getOpcode()); |
| |
| // Find the PC-relative immediate operand in the instruction. |
| for (unsigned OpNum = 0; OpNum < Desc.getNumOperands(); ++OpNum) { |
| if (Inst.getOperand(OpNum).isImm() && |
| Desc.operands()[OpNum].OperandType == MCOI::OPERAND_PCREL) { |
| int64_t Imm = Inst.getOperand(OpNum).getImm(); |
| Target = ARM_MC::evaluateBranchTarget(Desc, Addr, Imm); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| std::optional<uint64_t> |
| evaluateMemoryOperandAddress(const MCInst &Inst, const MCSubtargetInfo *STI, |
| uint64_t Addr, uint64_t Size) const override; |
| }; |
| |
| } // namespace |
| |
| static std::optional<uint64_t> |
| // NOLINTNEXTLINE(readability-identifier-naming) |
| evaluateMemOpAddrForAddrMode_i12(const MCInst &Inst, const MCInstrDesc &Desc, |
| unsigned MemOpIndex, uint64_t Addr) { |
| if (MemOpIndex + 1 >= Desc.getNumOperands()) |
| return std::nullopt; |
| |
| const MCOperand &MO1 = Inst.getOperand(MemOpIndex); |
| const MCOperand &MO2 = Inst.getOperand(MemOpIndex + 1); |
| if (!MO1.isReg() || MO1.getReg() != ARM::PC || !MO2.isImm()) |
| return std::nullopt; |
| |
| int32_t OffImm = (int32_t)MO2.getImm(); |
| // Special value for #-0. All others are normal. |
| if (OffImm == INT32_MIN) |
| OffImm = 0; |
| return Addr + OffImm; |
| } |
| |
| static std::optional<uint64_t> |
| evaluateMemOpAddrForAddrMode3(const MCInst &Inst, const MCInstrDesc &Desc, |
| unsigned MemOpIndex, uint64_t Addr) { |
| if (MemOpIndex + 2 >= Desc.getNumOperands()) |
| return std::nullopt; |
| |
| const MCOperand &MO1 = Inst.getOperand(MemOpIndex); |
| const MCOperand &MO2 = Inst.getOperand(MemOpIndex + 1); |
| const MCOperand &MO3 = Inst.getOperand(MemOpIndex + 2); |
| if (!MO1.isReg() || MO1.getReg() != ARM::PC || MO2.getReg() || !MO3.isImm()) |
| return std::nullopt; |
| |
| unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm()); |
| ARM_AM::AddrOpc Op = ARM_AM::getAM3Op(MO3.getImm()); |
| |
| if (Op == ARM_AM::sub) |
| return Addr - ImmOffs; |
| return Addr + ImmOffs; |
| } |
| |
| static std::optional<uint64_t> |
| evaluateMemOpAddrForAddrMode5(const MCInst &Inst, const MCInstrDesc &Desc, |
| unsigned MemOpIndex, uint64_t Addr) { |
| if (MemOpIndex + 1 >= Desc.getNumOperands()) |
| return std::nullopt; |
| |
| const MCOperand &MO1 = Inst.getOperand(MemOpIndex); |
| const MCOperand &MO2 = Inst.getOperand(MemOpIndex + 1); |
| if (!MO1.isReg() || MO1.getReg() != ARM::PC || !MO2.isImm()) |
| return std::nullopt; |
| |
| unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm()); |
| ARM_AM::AddrOpc Op = ARM_AM::getAM5Op(MO2.getImm()); |
| |
| if (Op == ARM_AM::sub) |
| return Addr - ImmOffs * 4; |
| return Addr + ImmOffs * 4; |
| } |
| |
| static std::optional<uint64_t> |
| evaluateMemOpAddrForAddrMode5FP16(const MCInst &Inst, const MCInstrDesc &Desc, |
| unsigned MemOpIndex, uint64_t Addr) { |
| if (MemOpIndex + 1 >= Desc.getNumOperands()) |
| return std::nullopt; |
| |
| const MCOperand &MO1 = Inst.getOperand(MemOpIndex); |
| const MCOperand &MO2 = Inst.getOperand(MemOpIndex + 1); |
| if (!MO1.isReg() || MO1.getReg() != ARM::PC || !MO2.isImm()) |
| return std::nullopt; |
| |
| unsigned ImmOffs = ARM_AM::getAM5FP16Offset(MO2.getImm()); |
| ARM_AM::AddrOpc Op = ARM_AM::getAM5FP16Op(MO2.getImm()); |
| |
| if (Op == ARM_AM::sub) |
| return Addr - ImmOffs * 2; |
| return Addr + ImmOffs * 2; |
| } |
| |
| static std::optional<uint64_t> |
| // NOLINTNEXTLINE(readability-identifier-naming) |
| evaluateMemOpAddrForAddrModeT2_i8s4(const MCInst &Inst, const MCInstrDesc &Desc, |
| unsigned MemOpIndex, uint64_t Addr) { |
| if (MemOpIndex + 1 >= Desc.getNumOperands()) |
| return std::nullopt; |
| |
| const MCOperand &MO1 = Inst.getOperand(MemOpIndex); |
| const MCOperand &MO2 = Inst.getOperand(MemOpIndex + 1); |
| if (!MO1.isReg() || MO1.getReg() != ARM::PC || !MO2.isImm()) |
| return std::nullopt; |
| |
| int32_t OffImm = (int32_t)MO2.getImm(); |
| assert(((OffImm & 0x3) == 0) && "Not a valid immediate!"); |
| |
| // Special value for #-0. All others are normal. |
| if (OffImm == INT32_MIN) |
| OffImm = 0; |
| return Addr + OffImm; |
| } |
| |
| static std::optional<uint64_t> |
| // NOLINTNEXTLINE(readability-identifier-naming) |
| evaluateMemOpAddrForAddrModeT2_pc(const MCInst &Inst, const MCInstrDesc &Desc, |
| unsigned MemOpIndex, uint64_t Addr) { |
| const MCOperand &MO1 = Inst.getOperand(MemOpIndex); |
| if (!MO1.isImm()) |
| return std::nullopt; |
| |
| int32_t OffImm = (int32_t)MO1.getImm(); |
| |
| // Special value for #-0. All others are normal. |
| if (OffImm == INT32_MIN) |
| OffImm = 0; |
| return Addr + OffImm; |
| } |
| |
| static std::optional<uint64_t> |
| // NOLINTNEXTLINE(readability-identifier-naming) |
| evaluateMemOpAddrForAddrModeT1_s(const MCInst &Inst, const MCInstrDesc &Desc, |
| unsigned MemOpIndex, uint64_t Addr) { |
| return evaluateMemOpAddrForAddrModeT2_pc(Inst, Desc, MemOpIndex, Addr); |
| } |
| |
| std::optional<uint64_t> ARMMCInstrAnalysis::evaluateMemoryOperandAddress( |
| const MCInst &Inst, const MCSubtargetInfo *STI, uint64_t Addr, |
| uint64_t Size) const { |
| const MCInstrDesc &Desc = Info->get(Inst.getOpcode()); |
| |
| // Only load instructions can have PC-relative memory addressing. |
| if (!Desc.mayLoad()) |
| return std::nullopt; |
| |
| // PC-relative addressing does not update the base register. |
| uint64_t TSFlags = Desc.TSFlags; |
| unsigned IndexMode = |
| (TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift; |
| if (IndexMode != ARMII::IndexModeNone) |
| return std::nullopt; |
| |
| // Find the memory addressing operand in the instruction. |
| unsigned OpIndex = Desc.NumDefs; |
| while (OpIndex < Desc.getNumOperands() && |
| Desc.operands()[OpIndex].OperandType != MCOI::OPERAND_MEMORY) |
| ++OpIndex; |
| if (OpIndex == Desc.getNumOperands()) |
| return std::nullopt; |
| |
| // Base address for PC-relative addressing is always 32-bit aligned. |
| Addr &= ~0x3; |
| |
| // For ARM instructions the PC offset is 8 bytes, for Thumb instructions it |
| // is 4 bytes. |
| switch (Desc.TSFlags & ARMII::FormMask) { |
| default: |
| Addr += 8; |
| break; |
| case ARMII::ThumbFrm: |
| Addr += 4; |
| break; |
| // VLDR* instructions share the same opcode (and thus the same form) for Arm |
| // and Thumb. Use a bit longer route through STI in that case. |
| case ARMII::VFPLdStFrm: |
| Addr += STI->getFeatureBits()[ARM::ModeThumb] ? 4 : 8; |
| break; |
| } |
| |
| // Eveluate the address depending on the addressing mode |
| unsigned AddrMode = (TSFlags & ARMII::AddrModeMask); |
| switch (AddrMode) { |
| default: |
| return std::nullopt; |
| case ARMII::AddrMode_i12: |
| return evaluateMemOpAddrForAddrMode_i12(Inst, Desc, OpIndex, Addr); |
| case ARMII::AddrMode3: |
| return evaluateMemOpAddrForAddrMode3(Inst, Desc, OpIndex, Addr); |
| case ARMII::AddrMode5: |
| return evaluateMemOpAddrForAddrMode5(Inst, Desc, OpIndex, Addr); |
| case ARMII::AddrMode5FP16: |
| return evaluateMemOpAddrForAddrMode5FP16(Inst, Desc, OpIndex, Addr); |
| case ARMII::AddrModeT2_i8s4: |
| return evaluateMemOpAddrForAddrModeT2_i8s4(Inst, Desc, OpIndex, Addr); |
| case ARMII::AddrModeT2_pc: |
| return evaluateMemOpAddrForAddrModeT2_pc(Inst, Desc, OpIndex, Addr); |
| case ARMII::AddrModeT1_s: |
| return evaluateMemOpAddrForAddrModeT1_s(Inst, Desc, OpIndex, Addr); |
| } |
| } |
| |
| static MCInstrAnalysis *createARMMCInstrAnalysis(const MCInstrInfo *Info) { |
| return new ARMMCInstrAnalysis(Info); |
| } |
| |
| bool ARM::isCDECoproc(size_t Coproc, const MCSubtargetInfo &STI) { |
| // Unfortunately we don't have ARMTargetInfo in the disassembler, so we have |
| // to rely on feature bits. |
| if (Coproc >= 8) |
| return false; |
| return STI.getFeatureBits()[ARM::FeatureCoprocCDE0 + Coproc]; |
| } |
| |
| // Force static initialization. |
| extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARMTargetMC() { |
| for (Target *T : {&getTheARMLETarget(), &getTheARMBETarget(), |
| &getTheThumbLETarget(), &getTheThumbBETarget()}) { |
| // Register the MC asm info. |
| RegisterMCAsmInfoFn X(*T, createARMMCAsmInfo); |
| |
| // Register the MC instruction info. |
| TargetRegistry::RegisterMCInstrInfo(*T, createARMMCInstrInfo); |
| |
| // Register the MC register info. |
| TargetRegistry::RegisterMCRegInfo(*T, createARMMCRegisterInfo); |
| |
| // Register the MC subtarget info. |
| TargetRegistry::RegisterMCSubtargetInfo(*T, |
| ARM_MC::createARMMCSubtargetInfo); |
| |
| TargetRegistry::RegisterELFStreamer(*T, createELFStreamer); |
| TargetRegistry::RegisterCOFFStreamer(*T, createARMWinCOFFStreamer); |
| TargetRegistry::RegisterMachOStreamer(*T, createARMMachOStreamer); |
| |
| // Register the obj target streamer. |
| TargetRegistry::RegisterObjectTargetStreamer(*T, |
| createARMObjectTargetStreamer); |
| |
| // Register the asm streamer. |
| TargetRegistry::RegisterAsmTargetStreamer(*T, createARMTargetAsmStreamer); |
| |
| // Register the null TargetStreamer. |
| TargetRegistry::RegisterNullTargetStreamer(*T, createARMNullTargetStreamer); |
| |
| // Register the MCInstPrinter. |
| TargetRegistry::RegisterMCInstPrinter(*T, createARMMCInstPrinter); |
| |
| // Register the MC relocation info. |
| TargetRegistry::RegisterMCRelocationInfo(*T, createARMMCRelocationInfo); |
| } |
| |
| // Register the MC instruction analyzer. |
| for (Target *T : {&getTheARMLETarget(), &getTheARMBETarget(), |
| &getTheThumbLETarget(), &getTheThumbBETarget()}) |
| TargetRegistry::RegisterMCInstrAnalysis(*T, createARMMCInstrAnalysis); |
| |
| for (Target *T : {&getTheARMLETarget(), &getTheThumbLETarget()}) { |
| TargetRegistry::RegisterMCCodeEmitter(*T, createARMLEMCCodeEmitter); |
| TargetRegistry::RegisterMCAsmBackend(*T, createARMLEAsmBackend); |
| } |
| for (Target *T : {&getTheARMBETarget(), &getTheThumbBETarget()}) { |
| TargetRegistry::RegisterMCCodeEmitter(*T, createARMBEMCCodeEmitter); |
| TargetRegistry::RegisterMCAsmBackend(*T, createARMBEAsmBackend); |
| } |
| } |