//===- AArch64Disassembler.cpp - Disassembler for AArch64 ISA -------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file contains the functions necessary to decode AArch64 instruction // bitpatterns into MCInsts (with the help of TableGenerated information from // the instruction definitions). // //===----------------------------------------------------------------------===// /* Capstone Disassembly Engine */ /* By Nguyen Anh Quynh , 2013-2014 */ #ifdef CAPSTONE_HAS_ARM64 #include // DEBUG #include #include "../../cs_priv.h" #include "../../utils.h" #include "../../MCInst.h" #include "../../MCInstrDesc.h" #include "../../MCFixedLenDisassembler.h" #include "../../MCRegisterInfo.h" #include "../../MCDisassembler.h" #include "AArch64BaseInfo.h" #include "AArch64AddressingModes.h" // Forward declare these because the autogenerated code will reference them. // Definitions are further down. static DecodeStatus DecodeFPR128RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFPR128_loRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFPR64RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFPR32RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFPR16RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFPR8RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeGPR64RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeGPR64spRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeGPR32RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeGPR32spRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeQQRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeQQQRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeQQQQRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeDDRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeDDDRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeDDDDRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFixedPointScaleImm32(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFixedPointScaleImm64(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder); static DecodeStatus DecodePCRelLabel19(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder); static DecodeStatus DecodeMemExtend(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder); static DecodeStatus DecodeMRSSystemRegister(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder); static DecodeStatus DecodeMSRSystemRegister(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder); static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeMoveImmInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeUnsignedLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeSignedLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeExclusiveLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodePairLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeAddSubERegInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeLogicalImmInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeModImmInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeModImmTiedInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeAdrInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeBaseAddSubImm(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeUnconditionalBranch(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeSystemPStateInstruction(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeTestAndBranch(MCInst *Inst, uint32_t insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeFMOVLaneInstruction(MCInst *Inst, unsigned Insn, uint64_t Address, const void *Decoder); static DecodeStatus DecodeVecShiftR64Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftR32Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftR16Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftR8Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftL64Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftL32Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftL16Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static DecodeStatus DecodeVecShiftL8Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder); static bool Check(DecodeStatus *Out, DecodeStatus In) { switch (In) { default: // never reach return true; case MCDisassembler_Success: // Out stays the same. return true; case MCDisassembler_SoftFail: *Out = In; return true; case MCDisassembler_Fail: *Out = In; return false; } // llvm_unreachable("Invalid DecodeStatus!"); } // Hacky: enable all features for disassembler static uint64_t getFeatureBits(int feature) { // enable all features return (uint64_t)-1; } #define GET_SUBTARGETINFO_ENUM #include "AArch64GenSubtargetInfo.inc" #include "AArch64GenDisassemblerTables.inc" #define GET_INSTRINFO_ENUM #include "AArch64GenInstrInfo.inc" #define GET_REGINFO_ENUM #define GET_REGINFO_MC_DESC #include "AArch64GenRegisterInfo.inc" #define Success MCDisassembler_Success #define Fail MCDisassembler_Fail #define SoftFail MCDisassembler_SoftFail static DecodeStatus _getInstruction(cs_struct *ud, MCInst *MI, const uint8_t *code, size_t code_len, uint16_t *Size, uint64_t Address, MCRegisterInfo *MRI) { uint32_t insn; DecodeStatus result; size_t i; if (code_len < 4) { // not enough data *Size = 0; return MCDisassembler_Fail; } if (MI->flat_insn->detail) { memset(MI->flat_insn->detail, 0, sizeof(cs_detail)); for (i = 0; i < ARR_SIZE(MI->flat_insn->detail->arm64.operands); i++) MI->flat_insn->detail->arm64.operands[i].vector_index = -1; } if (MODE_IS_BIG_ENDIAN(ud->mode)) insn = (code[3] << 0) | (code[2] << 8) | (code[1] << 16) | (code[0] << 24); else insn = (code[3] << 24) | (code[2] << 16) | (code[1] << 8) | (code[0] << 0); // Calling the auto-generated decoder function. result = decodeInstruction(DecoderTable32, MI, insn, Address, MRI, 0); if (result != MCDisassembler_Fail) { *Size = 4; return result; } MCInst_clear(MI); *Size = 0; return MCDisassembler_Fail; } bool AArch64_getInstruction(csh ud, const uint8_t *code, size_t code_len, MCInst *instr, uint16_t *size, uint64_t address, void *info) { DecodeStatus status = _getInstruction((cs_struct *)ud, instr, code, code_len, size, address, (MCRegisterInfo *)info); return status == MCDisassembler_Success; } static const unsigned FPR128DecoderTable[] = { AArch64_Q0, AArch64_Q1, AArch64_Q2, AArch64_Q3, AArch64_Q4, AArch64_Q5, AArch64_Q6, AArch64_Q7, AArch64_Q8, AArch64_Q9, AArch64_Q10, AArch64_Q11, AArch64_Q12, AArch64_Q13, AArch64_Q14, AArch64_Q15, AArch64_Q16, AArch64_Q17, AArch64_Q18, AArch64_Q19, AArch64_Q20, AArch64_Q21, AArch64_Q22, AArch64_Q23, AArch64_Q24, AArch64_Q25, AArch64_Q26, AArch64_Q27, AArch64_Q28, AArch64_Q29, AArch64_Q30, AArch64_Q31 }; static DecodeStatus DecodeFPR128RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = FPR128DecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static DecodeStatus DecodeFPR128_loRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { if (RegNo > 15) return Fail; return DecodeFPR128RegisterClass(Inst, RegNo, Addr, Decoder); } static const unsigned FPR64DecoderTable[] = { AArch64_D0, AArch64_D1, AArch64_D2, AArch64_D3, AArch64_D4, AArch64_D5, AArch64_D6, AArch64_D7, AArch64_D8, AArch64_D9, AArch64_D10, AArch64_D11, AArch64_D12, AArch64_D13, AArch64_D14, AArch64_D15, AArch64_D16, AArch64_D17, AArch64_D18, AArch64_D19, AArch64_D20, AArch64_D21, AArch64_D22, AArch64_D23, AArch64_D24, AArch64_D25, AArch64_D26, AArch64_D27, AArch64_D28, AArch64_D29, AArch64_D30, AArch64_D31 }; static DecodeStatus DecodeFPR64RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = FPR64DecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned FPR32DecoderTable[] = { AArch64_S0, AArch64_S1, AArch64_S2, AArch64_S3, AArch64_S4, AArch64_S5, AArch64_S6, AArch64_S7, AArch64_S8, AArch64_S9, AArch64_S10, AArch64_S11, AArch64_S12, AArch64_S13, AArch64_S14, AArch64_S15, AArch64_S16, AArch64_S17, AArch64_S18, AArch64_S19, AArch64_S20, AArch64_S21, AArch64_S22, AArch64_S23, AArch64_S24, AArch64_S25, AArch64_S26, AArch64_S27, AArch64_S28, AArch64_S29, AArch64_S30, AArch64_S31 }; static DecodeStatus DecodeFPR32RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = FPR32DecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned FPR16DecoderTable[] = { AArch64_H0, AArch64_H1, AArch64_H2, AArch64_H3, AArch64_H4, AArch64_H5, AArch64_H6, AArch64_H7, AArch64_H8, AArch64_H9, AArch64_H10, AArch64_H11, AArch64_H12, AArch64_H13, AArch64_H14, AArch64_H15, AArch64_H16, AArch64_H17, AArch64_H18, AArch64_H19, AArch64_H20, AArch64_H21, AArch64_H22, AArch64_H23, AArch64_H24, AArch64_H25, AArch64_H26, AArch64_H27, AArch64_H28, AArch64_H29, AArch64_H30, AArch64_H31 }; static DecodeStatus DecodeFPR16RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = FPR16DecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned FPR8DecoderTable[] = { AArch64_B0, AArch64_B1, AArch64_B2, AArch64_B3, AArch64_B4, AArch64_B5, AArch64_B6, AArch64_B7, AArch64_B8, AArch64_B9, AArch64_B10, AArch64_B11, AArch64_B12, AArch64_B13, AArch64_B14, AArch64_B15, AArch64_B16, AArch64_B17, AArch64_B18, AArch64_B19, AArch64_B20, AArch64_B21, AArch64_B22, AArch64_B23, AArch64_B24, AArch64_B25, AArch64_B26, AArch64_B27, AArch64_B28, AArch64_B29, AArch64_B30, AArch64_B31 }; static DecodeStatus DecodeFPR8RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = FPR8DecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned GPR64DecoderTable[] = { AArch64_X0, AArch64_X1, AArch64_X2, AArch64_X3, AArch64_X4, AArch64_X5, AArch64_X6, AArch64_X7, AArch64_X8, AArch64_X9, AArch64_X10, AArch64_X11, AArch64_X12, AArch64_X13, AArch64_X14, AArch64_X15, AArch64_X16, AArch64_X17, AArch64_X18, AArch64_X19, AArch64_X20, AArch64_X21, AArch64_X22, AArch64_X23, AArch64_X24, AArch64_X25, AArch64_X26, AArch64_X27, AArch64_X28, AArch64_FP, AArch64_LR, AArch64_XZR }; static DecodeStatus DecodeGPR64RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = GPR64DecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static DecodeStatus DecodeGPR64spRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = GPR64DecoderTable[RegNo]; if (Register == AArch64_XZR) Register = AArch64_SP; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned GPR32DecoderTable[] = { AArch64_W0, AArch64_W1, AArch64_W2, AArch64_W3, AArch64_W4, AArch64_W5, AArch64_W6, AArch64_W7, AArch64_W8, AArch64_W9, AArch64_W10, AArch64_W11, AArch64_W12, AArch64_W13, AArch64_W14, AArch64_W15, AArch64_W16, AArch64_W17, AArch64_W18, AArch64_W19, AArch64_W20, AArch64_W21, AArch64_W22, AArch64_W23, AArch64_W24, AArch64_W25, AArch64_W26, AArch64_W27, AArch64_W28, AArch64_W29, AArch64_W30, AArch64_WZR }; static DecodeStatus DecodeGPR32RegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = GPR32DecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static DecodeStatus DecodeGPR32spRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = GPR32DecoderTable[RegNo]; if (Register == AArch64_WZR) Register = AArch64_WSP; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned VectorDecoderTable[] = { AArch64_Q0, AArch64_Q1, AArch64_Q2, AArch64_Q3, AArch64_Q4, AArch64_Q5, AArch64_Q6, AArch64_Q7, AArch64_Q8, AArch64_Q9, AArch64_Q10, AArch64_Q11, AArch64_Q12, AArch64_Q13, AArch64_Q14, AArch64_Q15, AArch64_Q16, AArch64_Q17, AArch64_Q18, AArch64_Q19, AArch64_Q20, AArch64_Q21, AArch64_Q22, AArch64_Q23, AArch64_Q24, AArch64_Q25, AArch64_Q26, AArch64_Q27, AArch64_Q28, AArch64_Q29, AArch64_Q30, AArch64_Q31 }; static DecodeStatus DecodeVectorRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = VectorDecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned QQDecoderTable[] = { AArch64_Q0_Q1, AArch64_Q1_Q2, AArch64_Q2_Q3, AArch64_Q3_Q4, AArch64_Q4_Q5, AArch64_Q5_Q6, AArch64_Q6_Q7, AArch64_Q7_Q8, AArch64_Q8_Q9, AArch64_Q9_Q10, AArch64_Q10_Q11, AArch64_Q11_Q12, AArch64_Q12_Q13, AArch64_Q13_Q14, AArch64_Q14_Q15, AArch64_Q15_Q16, AArch64_Q16_Q17, AArch64_Q17_Q18, AArch64_Q18_Q19, AArch64_Q19_Q20, AArch64_Q20_Q21, AArch64_Q21_Q22, AArch64_Q22_Q23, AArch64_Q23_Q24, AArch64_Q24_Q25, AArch64_Q25_Q26, AArch64_Q26_Q27, AArch64_Q27_Q28, AArch64_Q28_Q29, AArch64_Q29_Q30, AArch64_Q30_Q31, AArch64_Q31_Q0 }; static DecodeStatus DecodeQQRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = QQDecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned QQQDecoderTable[] = { AArch64_Q0_Q1_Q2, AArch64_Q1_Q2_Q3, AArch64_Q2_Q3_Q4, AArch64_Q3_Q4_Q5, AArch64_Q4_Q5_Q6, AArch64_Q5_Q6_Q7, AArch64_Q6_Q7_Q8, AArch64_Q7_Q8_Q9, AArch64_Q8_Q9_Q10, AArch64_Q9_Q10_Q11, AArch64_Q10_Q11_Q12, AArch64_Q11_Q12_Q13, AArch64_Q12_Q13_Q14, AArch64_Q13_Q14_Q15, AArch64_Q14_Q15_Q16, AArch64_Q15_Q16_Q17, AArch64_Q16_Q17_Q18, AArch64_Q17_Q18_Q19, AArch64_Q18_Q19_Q20, AArch64_Q19_Q20_Q21, AArch64_Q20_Q21_Q22, AArch64_Q21_Q22_Q23, AArch64_Q22_Q23_Q24, AArch64_Q23_Q24_Q25, AArch64_Q24_Q25_Q26, AArch64_Q25_Q26_Q27, AArch64_Q26_Q27_Q28, AArch64_Q27_Q28_Q29, AArch64_Q28_Q29_Q30, AArch64_Q29_Q30_Q31, AArch64_Q30_Q31_Q0, AArch64_Q31_Q0_Q1 }; static DecodeStatus DecodeQQQRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = QQQDecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned QQQQDecoderTable[] = { AArch64_Q0_Q1_Q2_Q3, AArch64_Q1_Q2_Q3_Q4, AArch64_Q2_Q3_Q4_Q5, AArch64_Q3_Q4_Q5_Q6, AArch64_Q4_Q5_Q6_Q7, AArch64_Q5_Q6_Q7_Q8, AArch64_Q6_Q7_Q8_Q9, AArch64_Q7_Q8_Q9_Q10, AArch64_Q8_Q9_Q10_Q11, AArch64_Q9_Q10_Q11_Q12, AArch64_Q10_Q11_Q12_Q13, AArch64_Q11_Q12_Q13_Q14, AArch64_Q12_Q13_Q14_Q15, AArch64_Q13_Q14_Q15_Q16, AArch64_Q14_Q15_Q16_Q17, AArch64_Q15_Q16_Q17_Q18, AArch64_Q16_Q17_Q18_Q19, AArch64_Q17_Q18_Q19_Q20, AArch64_Q18_Q19_Q20_Q21, AArch64_Q19_Q20_Q21_Q22, AArch64_Q20_Q21_Q22_Q23, AArch64_Q21_Q22_Q23_Q24, AArch64_Q22_Q23_Q24_Q25, AArch64_Q23_Q24_Q25_Q26, AArch64_Q24_Q25_Q26_Q27, AArch64_Q25_Q26_Q27_Q28, AArch64_Q26_Q27_Q28_Q29, AArch64_Q27_Q28_Q29_Q30, AArch64_Q28_Q29_Q30_Q31, AArch64_Q29_Q30_Q31_Q0, AArch64_Q30_Q31_Q0_Q1, AArch64_Q31_Q0_Q1_Q2 }; static DecodeStatus DecodeQQQQRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = QQQQDecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned DDDecoderTable[] = { AArch64_D0_D1, AArch64_D1_D2, AArch64_D2_D3, AArch64_D3_D4, AArch64_D4_D5, AArch64_D5_D6, AArch64_D6_D7, AArch64_D7_D8, AArch64_D8_D9, AArch64_D9_D10, AArch64_D10_D11, AArch64_D11_D12, AArch64_D12_D13, AArch64_D13_D14, AArch64_D14_D15, AArch64_D15_D16, AArch64_D16_D17, AArch64_D17_D18, AArch64_D18_D19, AArch64_D19_D20, AArch64_D20_D21, AArch64_D21_D22, AArch64_D22_D23, AArch64_D23_D24, AArch64_D24_D25, AArch64_D25_D26, AArch64_D26_D27, AArch64_D27_D28, AArch64_D28_D29, AArch64_D29_D30, AArch64_D30_D31, AArch64_D31_D0 }; static DecodeStatus DecodeDDRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = DDDecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned DDDDecoderTable[] = { AArch64_D0_D1_D2, AArch64_D1_D2_D3, AArch64_D2_D3_D4, AArch64_D3_D4_D5, AArch64_D4_D5_D6, AArch64_D5_D6_D7, AArch64_D6_D7_D8, AArch64_D7_D8_D9, AArch64_D8_D9_D10, AArch64_D9_D10_D11, AArch64_D10_D11_D12, AArch64_D11_D12_D13, AArch64_D12_D13_D14, AArch64_D13_D14_D15, AArch64_D14_D15_D16, AArch64_D15_D16_D17, AArch64_D16_D17_D18, AArch64_D17_D18_D19, AArch64_D18_D19_D20, AArch64_D19_D20_D21, AArch64_D20_D21_D22, AArch64_D21_D22_D23, AArch64_D22_D23_D24, AArch64_D23_D24_D25, AArch64_D24_D25_D26, AArch64_D25_D26_D27, AArch64_D26_D27_D28, AArch64_D27_D28_D29, AArch64_D28_D29_D30, AArch64_D29_D30_D31, AArch64_D30_D31_D0, AArch64_D31_D0_D1 }; static DecodeStatus DecodeDDDRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = DDDDecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static const unsigned DDDDDecoderTable[] = { AArch64_D0_D1_D2_D3, AArch64_D1_D2_D3_D4, AArch64_D2_D3_D4_D5, AArch64_D3_D4_D5_D6, AArch64_D4_D5_D6_D7, AArch64_D5_D6_D7_D8, AArch64_D6_D7_D8_D9, AArch64_D7_D8_D9_D10, AArch64_D8_D9_D10_D11, AArch64_D9_D10_D11_D12, AArch64_D10_D11_D12_D13, AArch64_D11_D12_D13_D14, AArch64_D12_D13_D14_D15, AArch64_D13_D14_D15_D16, AArch64_D14_D15_D16_D17, AArch64_D15_D16_D17_D18, AArch64_D16_D17_D18_D19, AArch64_D17_D18_D19_D20, AArch64_D18_D19_D20_D21, AArch64_D19_D20_D21_D22, AArch64_D20_D21_D22_D23, AArch64_D21_D22_D23_D24, AArch64_D22_D23_D24_D25, AArch64_D23_D24_D25_D26, AArch64_D24_D25_D26_D27, AArch64_D25_D26_D27_D28, AArch64_D26_D27_D28_D29, AArch64_D27_D28_D29_D30, AArch64_D28_D29_D30_D31, AArch64_D29_D30_D31_D0, AArch64_D30_D31_D0_D1, AArch64_D31_D0_D1_D2 }; static DecodeStatus DecodeDDDDRegisterClass(MCInst *Inst, unsigned RegNo, uint64_t Addr, const void *Decoder) { unsigned Register; if (RegNo > 31) return Fail; Register = DDDDDecoderTable[RegNo]; MCOperand_CreateReg0(Inst, Register); return Success; } static DecodeStatus DecodeFixedPointScaleImm32(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { // scale{5} is asserted as 1 in tblgen. Imm |= 0x20; MCOperand_CreateImm0(Inst, 64 - Imm); return Success; } static DecodeStatus DecodeFixedPointScaleImm64(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { MCOperand_CreateImm0(Inst, 64 - Imm); return Success; } static DecodeStatus DecodePCRelLabel19(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { int64_t ImmVal = Imm; // Sign-extend 19-bit immediate. if (ImmVal & (1 << (19 - 1))) ImmVal |= ~((1LL << 19) - 1); MCOperand_CreateImm0(Inst, ImmVal); return Success; } static DecodeStatus DecodeMemExtend(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder) { MCOperand_CreateImm0(Inst, (Imm >> 1) & 1); MCOperand_CreateImm0(Inst, Imm & 1); return Success; } static DecodeStatus DecodeMRSSystemRegister(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder) { bool ValidNamed; char result[128]; Imm |= 0x8000; MCOperand_CreateImm0(Inst, Imm); A64SysRegMapper_toString(&AArch64_MRSMapper, Imm, &ValidNamed, result); return ValidNamed ? Success : Fail; } static DecodeStatus DecodeMSRSystemRegister(MCInst *Inst, unsigned Imm, uint64_t Address, const void *Decoder) { bool ValidNamed; char result[128]; Imm |= 0x8000; MCOperand_CreateImm0(Inst, Imm); A64SysRegMapper_toString(&AArch64_MSRMapper, Imm, &ValidNamed, result); return ValidNamed ? Success : Fail; } static DecodeStatus DecodeFMOVLaneInstruction(MCInst *Inst, unsigned Insn, uint64_t Address, const void *Decoder) { // This decoder exists to add the dummy Lane operand to the MCInst, which must // be 1 in assembly but has no other real manifestation. unsigned Rd = fieldFromInstruction(Insn, 0, 5); unsigned Rn = fieldFromInstruction(Insn, 5, 5); unsigned IsToVec = fieldFromInstruction(Insn, 16, 1); if (IsToVec) { DecodeFPR128RegisterClass(Inst, Rd, Address, Decoder); DecodeGPR64RegisterClass(Inst, Rn, Address, Decoder); } else { DecodeGPR64RegisterClass(Inst, Rd, Address, Decoder); DecodeFPR128RegisterClass(Inst, Rn, Address, Decoder); } // Add the lane MCOperand_CreateImm0(Inst, 1); return Success; } static DecodeStatus DecodeVecShiftRImm(MCInst *Inst, unsigned Imm, unsigned Add) { MCOperand_CreateImm0(Inst, Add - Imm); return Success; } static DecodeStatus DecodeVecShiftLImm(MCInst *Inst, unsigned Imm, unsigned Add) { MCOperand_CreateImm0(Inst, (Imm + Add) & (Add - 1)); return Success; } static DecodeStatus DecodeVecShiftR64Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftRImm(Inst, Imm, 64); } static DecodeStatus DecodeVecShiftR64ImmNarrow(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftRImm(Inst, Imm | 0x20, 64); } static DecodeStatus DecodeVecShiftR32Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftRImm(Inst, Imm, 32); } static DecodeStatus DecodeVecShiftR32ImmNarrow(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftRImm(Inst, Imm | 0x10, 32); } static DecodeStatus DecodeVecShiftR16Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftRImm(Inst, Imm, 16); } static DecodeStatus DecodeVecShiftR16ImmNarrow(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftRImm(Inst, Imm | 0x8, 16); } static DecodeStatus DecodeVecShiftR8Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftRImm(Inst, Imm, 8); } static DecodeStatus DecodeVecShiftL64Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftLImm(Inst, Imm, 64); } static DecodeStatus DecodeVecShiftL32Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftLImm(Inst, Imm, 32); } static DecodeStatus DecodeVecShiftL16Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftLImm(Inst, Imm, 16); } static DecodeStatus DecodeVecShiftL8Imm(MCInst *Inst, unsigned Imm, uint64_t Addr, const void *Decoder) { return DecodeVecShiftLImm(Inst, Imm, 8); } static DecodeStatus DecodeThreeAddrSRegInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd = fieldFromInstruction(insn, 0, 5); unsigned Rn = fieldFromInstruction(insn, 5, 5); unsigned Rm = fieldFromInstruction(insn, 16, 5); unsigned shiftHi = fieldFromInstruction(insn, 22, 2); unsigned shiftLo = fieldFromInstruction(insn, 10, 6); unsigned shift = (shiftHi << 6) | shiftLo; switch (MCInst_getOpcode(Inst)) { default: return Fail; case AArch64_ADDWrs: case AArch64_ADDSWrs: case AArch64_SUBWrs: case AArch64_SUBSWrs: // if shift == '11' then ReservedValue() if (shiftHi == 0x3) return Fail; // Deliberate fallthrough case AArch64_ANDWrs: case AArch64_ANDSWrs: case AArch64_BICWrs: case AArch64_BICSWrs: case AArch64_ORRWrs: case AArch64_ORNWrs: case AArch64_EORWrs: case AArch64_EONWrs: { // if sf == '0' and imm6<5> == '1' then ReservedValue() if (shiftLo >> 5 == 1) return Fail; DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); break; } case AArch64_ADDXrs: case AArch64_ADDSXrs: case AArch64_SUBXrs: case AArch64_SUBSXrs: // if shift == '11' then ReservedValue() if (shiftHi == 0x3) return Fail; // Deliberate fallthrough case AArch64_ANDXrs: case AArch64_ANDSXrs: case AArch64_BICXrs: case AArch64_BICSXrs: case AArch64_ORRXrs: case AArch64_ORNXrs: case AArch64_EORXrs: case AArch64_EONXrs: DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder); break; } MCOperand_CreateImm0(Inst, shift); return Success; } static DecodeStatus DecodeMoveImmInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd = fieldFromInstruction(insn, 0, 5); unsigned imm = fieldFromInstruction(insn, 5, 16); unsigned shift = fieldFromInstruction(insn, 21, 2); shift <<= 4; switch (MCInst_getOpcode(Inst)) { default: return Fail; case AArch64_MOVZWi: case AArch64_MOVNWi: case AArch64_MOVKWi: if (shift & (1U << 5)) return Fail; DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); break; case AArch64_MOVZXi: case AArch64_MOVNXi: case AArch64_MOVKXi: DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); break; } if (MCInst_getOpcode(Inst) == AArch64_MOVKWi || MCInst_getOpcode(Inst) == AArch64_MOVKXi) MCInst_addOperand2(Inst, MCInst_getOperand(Inst, 0)); MCOperand_CreateImm0(Inst, imm); MCOperand_CreateImm0(Inst, shift); return Success; } static DecodeStatus DecodeUnsignedLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rt = fieldFromInstruction(insn, 0, 5); unsigned Rn = fieldFromInstruction(insn, 5, 5); unsigned offset = fieldFromInstruction(insn, 10, 12); switch (MCInst_getOpcode(Inst)) { default: return Fail; case AArch64_PRFMui: // Rt is an immediate in prefetch. MCOperand_CreateImm0(Inst, Rt); break; case AArch64_STRBBui: case AArch64_LDRBBui: case AArch64_LDRSBWui: case AArch64_STRHHui: case AArch64_LDRHHui: case AArch64_LDRSHWui: case AArch64_STRWui: case AArch64_LDRWui: DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDRSBXui: case AArch64_LDRSHXui: case AArch64_LDRSWui: case AArch64_STRXui: case AArch64_LDRXui: DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDRQui: case AArch64_STRQui: DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDRDui: case AArch64_STRDui: DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDRSui: case AArch64_STRSui: DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDRHui: case AArch64_STRHui: DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDRBui: case AArch64_STRBui: DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder); break; } DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); //if (!Dis->tryAddingSymbolicOperand(Inst, offset, Addr, Fail, 0, 4)) MCOperand_CreateImm0(Inst, offset); return Success; } static DecodeStatus DecodeSignedLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { bool IsLoad; bool IsIndexed; bool IsFP; unsigned Rt = fieldFromInstruction(insn, 0, 5); unsigned Rn = fieldFromInstruction(insn, 5, 5); int64_t offset = fieldFromInstruction(insn, 12, 9); // offset is a 9-bit signed immediate, so sign extend it to // fill the unsigned. if (offset & (1 << (9 - 1))) offset |= ~((1LL << 9) - 1); // First operand is always the writeback to the address register, if needed. switch (MCInst_getOpcode(Inst)) { default: break; case AArch64_LDRSBWpre: case AArch64_LDRSHWpre: case AArch64_STRBBpre: case AArch64_LDRBBpre: case AArch64_STRHHpre: case AArch64_LDRHHpre: case AArch64_STRWpre: case AArch64_LDRWpre: case AArch64_LDRSBWpost: case AArch64_LDRSHWpost: case AArch64_STRBBpost: case AArch64_LDRBBpost: case AArch64_STRHHpost: case AArch64_LDRHHpost: case AArch64_STRWpost: case AArch64_LDRWpost: case AArch64_LDRSBXpre: case AArch64_LDRSHXpre: case AArch64_STRXpre: case AArch64_LDRSWpre: case AArch64_LDRXpre: case AArch64_LDRSBXpost: case AArch64_LDRSHXpost: case AArch64_STRXpost: case AArch64_LDRSWpost: case AArch64_LDRXpost: case AArch64_LDRQpre: case AArch64_STRQpre: case AArch64_LDRQpost: case AArch64_STRQpost: case AArch64_LDRDpre: case AArch64_STRDpre: case AArch64_LDRDpost: case AArch64_STRDpost: case AArch64_LDRSpre: case AArch64_STRSpre: case AArch64_LDRSpost: case AArch64_STRSpost: case AArch64_LDRHpre: case AArch64_STRHpre: case AArch64_LDRHpost: case AArch64_STRHpost: case AArch64_LDRBpre: case AArch64_STRBpre: case AArch64_LDRBpost: case AArch64_STRBpost: DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); break; } switch (MCInst_getOpcode(Inst)) { default: return Fail; case AArch64_PRFUMi: // Rt is an immediate in prefetch. MCOperand_CreateImm0(Inst, Rt); break; case AArch64_STURBBi: case AArch64_LDURBBi: case AArch64_LDURSBWi: case AArch64_STURHHi: case AArch64_LDURHHi: case AArch64_LDURSHWi: case AArch64_STURWi: case AArch64_LDURWi: case AArch64_LDTRSBWi: case AArch64_LDTRSHWi: case AArch64_STTRWi: case AArch64_LDTRWi: case AArch64_STTRHi: case AArch64_LDTRHi: case AArch64_LDTRBi: case AArch64_STTRBi: case AArch64_LDRSBWpre: case AArch64_LDRSHWpre: case AArch64_STRBBpre: case AArch64_LDRBBpre: case AArch64_STRHHpre: case AArch64_LDRHHpre: case AArch64_STRWpre: case AArch64_LDRWpre: case AArch64_LDRSBWpost: case AArch64_LDRSHWpost: case AArch64_STRBBpost: case AArch64_LDRBBpost: case AArch64_STRHHpost: case AArch64_LDRHHpost: case AArch64_STRWpost: case AArch64_LDRWpost: DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDURSBXi: case AArch64_LDURSHXi: case AArch64_LDURSWi: case AArch64_STURXi: case AArch64_LDURXi: case AArch64_LDTRSBXi: case AArch64_LDTRSHXi: case AArch64_LDTRSWi: case AArch64_STTRXi: case AArch64_LDTRXi: case AArch64_LDRSBXpre: case AArch64_LDRSHXpre: case AArch64_STRXpre: case AArch64_LDRSWpre: case AArch64_LDRXpre: case AArch64_LDRSBXpost: case AArch64_LDRSHXpost: case AArch64_STRXpost: case AArch64_LDRSWpost: case AArch64_LDRXpost: DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDURQi: case AArch64_STURQi: case AArch64_LDRQpre: case AArch64_STRQpre: case AArch64_LDRQpost: case AArch64_STRQpost: DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDURDi: case AArch64_STURDi: case AArch64_LDRDpre: case AArch64_STRDpre: case AArch64_LDRDpost: case AArch64_STRDpost: DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDURSi: case AArch64_STURSi: case AArch64_LDRSpre: case AArch64_STRSpre: case AArch64_LDRSpost: case AArch64_STRSpost: DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDURHi: case AArch64_STURHi: case AArch64_LDRHpre: case AArch64_STRHpre: case AArch64_LDRHpost: case AArch64_STRHpost: DecodeFPR16RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_LDURBi: case AArch64_STURBi: case AArch64_LDRBpre: case AArch64_STRBpre: case AArch64_LDRBpost: case AArch64_STRBpost: DecodeFPR8RegisterClass(Inst, Rt, Addr, Decoder); break; } DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); MCOperand_CreateImm0(Inst, offset); IsLoad = fieldFromInstruction(insn, 22, 1) != 0; IsIndexed = fieldFromInstruction(insn, 10, 2) != 0; IsFP = fieldFromInstruction(insn, 26, 1) != 0; // Cannot write back to a transfer register (but xzr != sp). if (IsLoad && IsIndexed && !IsFP && Rn != 31 && Rt == Rn) return SoftFail; return Success; } static DecodeStatus DecodeExclusiveLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rt = fieldFromInstruction(insn, 0, 5); unsigned Rn = fieldFromInstruction(insn, 5, 5); unsigned Rt2 = fieldFromInstruction(insn, 10, 5); unsigned Rs = fieldFromInstruction(insn, 16, 5); unsigned Opcode = MCInst_getOpcode(Inst); switch (Opcode) { default: return Fail; case AArch64_STLXRW: case AArch64_STLXRB: case AArch64_STLXRH: case AArch64_STXRW: case AArch64_STXRB: case AArch64_STXRH: DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); // FALLTHROUGH case AArch64_LDARW: case AArch64_LDARB: case AArch64_LDARH: case AArch64_LDAXRW: case AArch64_LDAXRB: case AArch64_LDAXRH: case AArch64_LDXRW: case AArch64_LDXRB: case AArch64_LDXRH: case AArch64_STLRW: case AArch64_STLRB: case AArch64_STLRH: DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_STLXRX: case AArch64_STXRX: DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); // FALLTHROUGH case AArch64_LDARX: case AArch64_LDAXRX: case AArch64_LDXRX: case AArch64_STLRX: DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); break; case AArch64_STLXPW: case AArch64_STXPW: DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); // FALLTHROUGH case AArch64_LDAXPW: case AArch64_LDXPW: DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder); break; case AArch64_STLXPX: case AArch64_STXPX: DecodeGPR32RegisterClass(Inst, Rs, Addr, Decoder); // FALLTHROUGH case AArch64_LDAXPX: case AArch64_LDXPX: DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder); break; } DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); // You shouldn't load to the same register twice in an instruction... if ((Opcode == AArch64_LDAXPW || Opcode == AArch64_LDXPW || Opcode == AArch64_LDAXPX || Opcode == AArch64_LDXPX) && Rt == Rt2) return SoftFail; return Success; } static DecodeStatus DecodePairLdStInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rt = fieldFromInstruction(insn, 0, 5); unsigned Rn = fieldFromInstruction(insn, 5, 5); unsigned Rt2 = fieldFromInstruction(insn, 10, 5); int64_t offset = fieldFromInstruction(insn, 15, 7); bool IsLoad = fieldFromInstruction(insn, 22, 1) != 0; unsigned Opcode = MCInst_getOpcode(Inst); bool NeedsDisjointWritebackTransfer = false; // offset is a 7-bit signed immediate, so sign extend it to // fill the unsigned. if (offset & (1 << (7 - 1))) offset |= ~((1LL << 7) - 1); // First operand is always writeback of base register. switch (Opcode) { default: break; case AArch64_LDPXpost: case AArch64_STPXpost: case AArch64_LDPSWpost: case AArch64_LDPXpre: case AArch64_STPXpre: case AArch64_LDPSWpre: case AArch64_LDPWpost: case AArch64_STPWpost: case AArch64_LDPWpre: case AArch64_STPWpre: case AArch64_LDPQpost: case AArch64_STPQpost: case AArch64_LDPQpre: case AArch64_STPQpre: case AArch64_LDPDpost: case AArch64_STPDpost: case AArch64_LDPDpre: case AArch64_STPDpre: case AArch64_LDPSpost: case AArch64_STPSpost: case AArch64_LDPSpre: case AArch64_STPSpre: DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); break; } switch (Opcode) { default: return Fail; case AArch64_LDPXpost: case AArch64_STPXpost: case AArch64_LDPSWpost: case AArch64_LDPXpre: case AArch64_STPXpre: case AArch64_LDPSWpre: NeedsDisjointWritebackTransfer = true; // Fallthrough case AArch64_LDNPXi: case AArch64_STNPXi: case AArch64_LDPXi: case AArch64_STPXi: case AArch64_LDPSWi: DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); DecodeGPR64RegisterClass(Inst, Rt2, Addr, Decoder); break; case AArch64_LDPWpost: case AArch64_STPWpost: case AArch64_LDPWpre: case AArch64_STPWpre: NeedsDisjointWritebackTransfer = true; // Fallthrough case AArch64_LDNPWi: case AArch64_STNPWi: case AArch64_LDPWi: case AArch64_STPWi: DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rt2, Addr, Decoder); break; case AArch64_LDNPQi: case AArch64_STNPQi: case AArch64_LDPQpost: case AArch64_STPQpost: case AArch64_LDPQi: case AArch64_STPQi: case AArch64_LDPQpre: case AArch64_STPQpre: DecodeFPR128RegisterClass(Inst, Rt, Addr, Decoder); DecodeFPR128RegisterClass(Inst, Rt2, Addr, Decoder); break; case AArch64_LDNPDi: case AArch64_STNPDi: case AArch64_LDPDpost: case AArch64_STPDpost: case AArch64_LDPDi: case AArch64_STPDi: case AArch64_LDPDpre: case AArch64_STPDpre: DecodeFPR64RegisterClass(Inst, Rt, Addr, Decoder); DecodeFPR64RegisterClass(Inst, Rt2, Addr, Decoder); break; case AArch64_LDNPSi: case AArch64_STNPSi: case AArch64_LDPSpost: case AArch64_STPSpost: case AArch64_LDPSi: case AArch64_STPSi: case AArch64_LDPSpre: case AArch64_STPSpre: DecodeFPR32RegisterClass(Inst, Rt, Addr, Decoder); DecodeFPR32RegisterClass(Inst, Rt2, Addr, Decoder); break; } DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); MCOperand_CreateImm0(Inst, offset); // You shouldn't load to the same register twice in an instruction... if (IsLoad && Rt == Rt2) return SoftFail; // ... or do any operation that writes-back to a transfer register. But note // that "stp xzr, xzr, [sp], #4" is fine because xzr and sp are different. if (NeedsDisjointWritebackTransfer && Rn != 31 && (Rt == Rn || Rt2 == Rn)) return SoftFail; return Success; } static DecodeStatus DecodeAddSubERegInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd, Rn, Rm; unsigned extend = fieldFromInstruction(insn, 10, 6); unsigned shift = extend & 0x7; if (shift > 4) return Fail; Rd = fieldFromInstruction(insn, 0, 5); Rn = fieldFromInstruction(insn, 5, 5); Rm = fieldFromInstruction(insn, 16, 5); switch (MCInst_getOpcode(Inst)) { default: return Fail; case AArch64_ADDWrx: case AArch64_SUBWrx: DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); break; case AArch64_ADDSWrx: case AArch64_SUBSWrx: DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); break; case AArch64_ADDXrx: case AArch64_SUBXrx: DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); break; case AArch64_ADDSXrx: case AArch64_SUBSXrx: DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rm, Addr, Decoder); break; case AArch64_ADDXrx64: case AArch64_SUBXrx64: DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder); break; case AArch64_SUBSXrx64: case AArch64_ADDSXrx64: DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); DecodeGPR64RegisterClass(Inst, Rm, Addr, Decoder); break; } MCOperand_CreateImm0(Inst, extend); return Success; } static DecodeStatus DecodeLogicalImmInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd = fieldFromInstruction(insn, 0, 5); unsigned Rn = fieldFromInstruction(insn, 5, 5); unsigned Datasize = fieldFromInstruction(insn, 31, 1); unsigned imm; if (Datasize) { if (MCInst_getOpcode(Inst) == AArch64_ANDSXri) DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); else DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR64RegisterClass(Inst, Rn, Addr, Decoder); imm = fieldFromInstruction(insn, 10, 13); if (!AArch64_AM_isValidDecodeLogicalImmediate(imm, 64)) return Fail; } else { if (MCInst_getOpcode(Inst) == AArch64_ANDSWri) DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); else DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR32RegisterClass(Inst, Rn, Addr, Decoder); imm = fieldFromInstruction(insn, 10, 12); if (!AArch64_AM_isValidDecodeLogicalImmediate(imm, 32)) return Fail; } MCOperand_CreateImm0(Inst, imm); return Success; } static DecodeStatus DecodeModImmInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd = fieldFromInstruction(insn, 0, 5); unsigned cmode = fieldFromInstruction(insn, 12, 4); unsigned imm = fieldFromInstruction(insn, 16, 3) << 5; imm |= fieldFromInstruction(insn, 5, 5); if (MCInst_getOpcode(Inst) == AArch64_MOVID) DecodeFPR64RegisterClass(Inst, Rd, Addr, Decoder); else DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder); MCOperand_CreateImm0(Inst, imm); switch (MCInst_getOpcode(Inst)) { default: break; case AArch64_MOVIv4i16: case AArch64_MOVIv8i16: case AArch64_MVNIv4i16: case AArch64_MVNIv8i16: case AArch64_MOVIv2i32: case AArch64_MOVIv4i32: case AArch64_MVNIv2i32: case AArch64_MVNIv4i32: MCOperand_CreateImm0(Inst, (cmode & 6) << 2); break; case AArch64_MOVIv2s_msl: case AArch64_MOVIv4s_msl: case AArch64_MVNIv2s_msl: case AArch64_MVNIv4s_msl: MCOperand_CreateImm0(Inst, cmode & 1 ? 0x110 : 0x108); break; } return Success; } static DecodeStatus DecodeModImmTiedInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd = fieldFromInstruction(insn, 0, 5); unsigned cmode = fieldFromInstruction(insn, 12, 4); unsigned imm = fieldFromInstruction(insn, 16, 3) << 5; imm |= fieldFromInstruction(insn, 5, 5); // Tied operands added twice. DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder); DecodeVectorRegisterClass(Inst, Rd, Addr, Decoder); MCOperand_CreateImm0(Inst, imm); MCOperand_CreateImm0(Inst, (cmode & 6) << 2); return Success; } static DecodeStatus DecodeAdrInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd = fieldFromInstruction(insn, 0, 5); int64_t imm = fieldFromInstruction(insn, 5, 19) << 2; imm |= fieldFromInstruction(insn, 29, 2); // Sign-extend the 21-bit immediate. if (imm & (1 << (21 - 1))) imm |= ~((1LL << 21) - 1); DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); //if (!Dis->tryAddingSymbolicOperand(Inst, imm, Addr, Fail, 0, 4)) MCOperand_CreateImm0(Inst, imm); return Success; } static DecodeStatus DecodeBaseAddSubImm(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { unsigned Rd = fieldFromInstruction(insn, 0, 5); unsigned Rn = fieldFromInstruction(insn, 5, 5); unsigned Imm = fieldFromInstruction(insn, 10, 14); unsigned S = fieldFromInstruction(insn, 29, 1); unsigned Datasize = fieldFromInstruction(insn, 31, 1); unsigned ShifterVal = (Imm >> 12) & 3; unsigned ImmVal = Imm & 0xFFF; if (ShifterVal != 0 && ShifterVal != 1) return Fail; if (Datasize) { if (Rd == 31 && !S) DecodeGPR64spRegisterClass(Inst, Rd, Addr, Decoder); else DecodeGPR64RegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR64spRegisterClass(Inst, Rn, Addr, Decoder); } else { if (Rd == 31 && !S) DecodeGPR32spRegisterClass(Inst, Rd, Addr, Decoder); else DecodeGPR32RegisterClass(Inst, Rd, Addr, Decoder); DecodeGPR32spRegisterClass(Inst, Rn, Addr, Decoder); } //if (!Dis->tryAddingSymbolicOperand(Inst, Imm, Addr, Fail, 0, 4)) MCOperand_CreateImm0(Inst, ImmVal); MCOperand_CreateImm0(Inst, 12 * ShifterVal); return Success; } static DecodeStatus DecodeUnconditionalBranch(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { int64_t imm = fieldFromInstruction(insn, 0, 26); // Sign-extend the 26-bit immediate. if (imm & (1 << (26 - 1))) imm |= ~((1LL << 26) - 1); // if (!Dis->tryAddingSymbolicOperand(Inst, imm << 2, Addr, true, 0, 4)) MCOperand_CreateImm0(Inst, imm); return Success; } static DecodeStatus DecodeSystemPStateInstruction(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { uint32_t op1 = fieldFromInstruction(insn, 16, 3); uint32_t op2 = fieldFromInstruction(insn, 5, 3); uint32_t crm = fieldFromInstruction(insn, 8, 4); bool ValidNamed; uint32_t pstate_field = (op1 << 3) | op2; MCOperand_CreateImm0(Inst, pstate_field); MCOperand_CreateImm0(Inst, crm); A64NamedImmMapper_toString(&A64PState_PStateMapper, pstate_field, &ValidNamed); return ValidNamed ? Success : Fail; } static DecodeStatus DecodeTestAndBranch(MCInst *Inst, uint32_t insn, uint64_t Addr, const void *Decoder) { uint32_t Rt = fieldFromInstruction(insn, 0, 5); uint32_t bit = fieldFromInstruction(insn, 31, 1) << 5; uint32_t dst = fieldFromInstruction(insn, 5, 14); bit |= fieldFromInstruction(insn, 19, 5); // Sign-extend 14-bit immediate. if (dst & (1 << (14 - 1))) dst |= ~((1LL << 14) - 1); if (fieldFromInstruction(insn, 31, 1) == 0) DecodeGPR32RegisterClass(Inst, Rt, Addr, Decoder); else DecodeGPR64RegisterClass(Inst, Rt, Addr, Decoder); MCOperand_CreateImm0(Inst, bit); //if (!Dis->tryAddingSymbolicOperand(Inst, dst << 2, Addr, true, 0, 4)) MCOperand_CreateImm0(Inst, dst); return Success; } void AArch64_init(MCRegisterInfo *MRI) { /* InitMCRegisterInfo(AArch64RegDesc, 420, RA, PC, AArch64MCRegisterClasses, 43, AArch64RegUnitRoots, 66, AArch64RegDiffLists, AArch64RegStrings, AArch64SubRegIdxLists, 53, AArch64SubRegIdxRanges, AArch64RegEncodingTable); */ MCRegisterInfo_InitMCRegisterInfo(MRI, AArch64RegDesc, 420, 0, 0, AArch64MCRegisterClasses, 43, 0, 0, AArch64RegDiffLists, 0, AArch64SubRegIdxLists, 53, 0); } #endif