1332 lines
38 KiB
C
1332 lines
38 KiB
C
//===- MipsDisassembler.cpp - Disassembler for Mips -------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is part of the Mips Disassembler.
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//
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//===----------------------------------------------------------------------===//
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/* Capstone Disassembly Engine */
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/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2014 */
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#ifdef CAPSTONE_HAS_MIPS
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#include <stdio.h>
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#include <string.h>
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#include <platform.h>
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#include "../../utils.h"
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#include "../../MCInst.h"
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#include "../../MCRegisterInfo.h"
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#include "../../SStream.h"
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#include "../../MathExtras.h"
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//#include "Mips.h"
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//#include "MipsRegisterInfo.h"
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//#include "MipsSubtarget.h"
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#include "../../MCFixedLenDisassembler.h"
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#include "../../MCInst.h"
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//#include "llvm/MC/MCSubtargetInfo.h"
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#include "../../MCRegisterInfo.h"
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#include "../../MCDisassembler.h"
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// Forward declare these because the autogenerated code will reference them.
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// Definitions are further down.
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static DecodeStatus DecodeGPR64RegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeGPR32RegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodePtrRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeDSPRRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeFGR64RegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeFGR32RegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeCCRRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeFCCRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeCCRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeFGRCCRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeHWRegsRegisterClass(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeAFGR64RegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeACC64DSPRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeHI32DSPRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeLO32DSPRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMSA128BRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMSA128HRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMSA128WRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMSA128DRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMSACtrlRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeCOP2RegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeBranchTarget(MCInst *Inst,
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unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeJumpTarget(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeBranchTarget21(MCInst *Inst,
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unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeBranchTarget26(MCInst *Inst,
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unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder);
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// DecodeBranchTargetMM - Decode microMIPS branch offset, which is
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// shifted left by 1 bit.
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static DecodeStatus DecodeBranchTargetMM(MCInst *Inst,
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unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder);
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// DecodeJumpTargetMM - Decode microMIPS jump target, which is
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// shifted left by 1 bit.
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static DecodeStatus DecodeJumpTargetMM(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMem(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeCachePref(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMSA128Mem(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMemMMImm12(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeMemMMImm16(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeFMem(MCInst *Inst, unsigned Insn,
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uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeCOP2Mem(MCInst *Inst, unsigned Insn,
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uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeCOP3Mem(MCInst *Inst, unsigned Insn,
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uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeSpecial3LlSc(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeSimm16(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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// Decode the immediate field of an LSA instruction which
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// is off by one.
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static DecodeStatus DecodeLSAImm(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeInsSize(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeExtSize(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeSimm19Lsl2(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeSimm18Lsl3(MCInst *Inst,
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unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder);
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/// INSVE_[BHWD] have an implicit operand that the generated decoder doesn't
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/// handle.
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static DecodeStatus DecodeINSVE_DF_4(MCInst *MI,
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uint32_t insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeAddiGroupBranch_4(MCInst *MI,
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uint32_t insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeDaddiGroupBranch_4(MCInst *MI,
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uint32_t insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeBlezlGroupBranch_4(MCInst *MI,
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uint32_t insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeBgtzlGroupBranch_4(MCInst *MI,
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uint32_t insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeBgtzGroupBranch_4(MCInst *MI,
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uint32_t insn, uint64_t Address, const MCRegisterInfo *Decoder);
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static DecodeStatus DecodeBlezGroupBranch_4(MCInst *MI,
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uint32_t insn, uint64_t Address, const MCRegisterInfo *Decoder);
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#define GET_SUBTARGETINFO_ENUM
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#include "MipsGenSubtargetInfo.inc"
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// Hacky: enable all features for disassembler
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static uint64_t getFeatureBits(int mode)
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{
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uint64_t Bits = (uint64_t)-1; // include every features at first
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// By default we do not support Mips1
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Bits &= ~Mips_FeatureMips1;
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// No MicroMips
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Bits &= ~Mips_FeatureMicroMips;
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// ref: MipsGenDisassemblerTables.inc::checkDecoderPredicate()
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// some features are mutually execlusive
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if (mode & CS_MODE_16) {
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//Bits &= ~Mips_FeatureMips32r2;
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//Bits &= ~Mips_FeatureMips32;
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//Bits &= ~Mips_FeatureFPIdx;
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//Bits &= ~Mips_FeatureBitCount;
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//Bits &= ~Mips_FeatureSwap;
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//Bits &= ~Mips_FeatureSEInReg;
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//Bits &= ~Mips_FeatureMips64r2;
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//Bits &= ~Mips_FeatureFP64Bit;
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} else if (mode & CS_MODE_32) {
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Bits &= ~Mips_FeatureMips16;
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Bits &= ~Mips_FeatureFP64Bit;
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Bits &= ~Mips_FeatureMips64r2;
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Bits &= ~Mips_FeatureMips32r6;
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Bits &= ~Mips_FeatureMips64r6;
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} else if (mode & CS_MODE_64) {
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Bits &= ~Mips_FeatureMips16;
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Bits &= ~Mips_FeatureMips64r6;
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Bits &= ~Mips_FeatureMips32r6;
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} else if (mode & CS_MODE_MIPS32R6) {
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Bits |= Mips_FeatureMips32r6;
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Bits &= ~Mips_FeatureMips16;
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Bits &= ~Mips_FeatureFP64Bit;
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Bits &= ~Mips_FeatureMips64r6;
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Bits &= ~Mips_FeatureMips64r2;
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}
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if (mode & CS_MODE_MICRO) {
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Bits |= Mips_FeatureMicroMips;
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Bits &= ~Mips_FeatureMips4_32r2;
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Bits &= ~Mips_FeatureMips2;
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}
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return Bits;
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}
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#include "MipsGenDisassemblerTables.inc"
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#define GET_REGINFO_ENUM
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#include "MipsGenRegisterInfo.inc"
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#define GET_REGINFO_MC_DESC
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#include "MipsGenRegisterInfo.inc"
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#define GET_INSTRINFO_ENUM
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#include "MipsGenInstrInfo.inc"
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void Mips_init(MCRegisterInfo *MRI)
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{
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// InitMCRegisterInfo(MipsRegDesc, 394, RA, PC,
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// MipsMCRegisterClasses, 48,
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// MipsRegUnitRoots,
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// 273,
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// MipsRegDiffLists,
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// MipsRegStrings,
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// MipsSubRegIdxLists,
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// 12,
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// MipsSubRegIdxRanges,
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// MipsRegEncodingTable);
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MCRegisterInfo_InitMCRegisterInfo(MRI, MipsRegDesc, 394,
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0, 0,
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MipsMCRegisterClasses, 48,
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0, 0,
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MipsRegDiffLists,
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0,
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MipsSubRegIdxLists, 12,
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0);
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}
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/// readInstruction - read four bytes from the MemoryObject
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/// and return 32 bit word sorted according to the given endianess
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static DecodeStatus readInstruction32(unsigned char *code, uint32_t *insn, bool isBigEndian, bool isMicroMips)
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{
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// We want to read exactly 4 Bytes of data.
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if (isBigEndian) {
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// Encoded as a big-endian 32-bit word in the stream.
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*insn = (code[3] << 0) |
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(code[2] << 8) |
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(code[1] << 16) |
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(code[0] << 24);
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} else {
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// Encoded as a small-endian 32-bit word in the stream.
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// Little-endian byte ordering:
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// mips32r2: 4 | 3 | 2 | 1
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// microMIPS: 2 | 1 | 4 | 3
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if (isMicroMips) {
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*insn = (code[2] << 0) |
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(code[3] << 8) |
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(code[0] << 16) |
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(code[1] << 24);
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} else {
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*insn = (code[0] << 0) |
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(code[1] << 8) |
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(code[2] << 16) |
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(code[3] << 24);
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}
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}
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return MCDisassembler_Success;
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}
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static DecodeStatus MipsDisassembler_getInstruction(int mode, MCInst *instr,
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const uint8_t *code, size_t code_len,
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uint16_t *Size,
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uint64_t Address, bool isBigEndian, MCRegisterInfo *MRI)
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{
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uint32_t Insn;
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DecodeStatus Result;
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if (code_len < 4)
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// not enough data
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return MCDisassembler_Fail;
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if (instr->flat_insn->detail) {
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memset(instr->flat_insn->detail, 0, sizeof(cs_detail));
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}
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Result = readInstruction32((unsigned char*)code, &Insn, isBigEndian,
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mode & CS_MODE_MICRO);
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if (Result == MCDisassembler_Fail)
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return MCDisassembler_Fail;
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if (mode & CS_MODE_MICRO) {
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// Calling the auto-generated decoder function.
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Result = decodeInstruction(DecoderTableMicroMips32, instr, Insn, Address, MRI, mode);
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if (Result != MCDisassembler_Fail) {
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*Size = 4;
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return Result;
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}
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return MCDisassembler_Fail;
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}
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#if 0
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// TODO: properly handle this in the future with MIPS1/2 modes
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if (((mode & CS_MODE_32) == 0) && ((mode & CS_MODE_MIPS3) == 0)) { // COP3
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// DEBUG(dbgs() << "Trying COP3_ table (32-bit opcodes):\n");
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Result = decodeInstruction(DecoderTableCOP3_32, instr, Insn, Address, MRI, mode);
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if (Result != MCDisassembler_Fail) {
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*Size = 4;
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return Result;
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}
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}
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#endif
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if (((mode & CS_MODE_MIPS32R6) != 0) && ((mode & CS_MODE_MIPSGP64) != 0)) {
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// DEBUG(dbgs() << "Trying Mips32r6_64r6 (GPR64) table (32-bit opcodes):\n");
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Result = decodeInstruction(DecoderTableMips32r6_64r6_GP6432, instr, Insn,
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Address, MRI, mode);
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if (Result != MCDisassembler_Fail) {
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*Size = 4;
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return Result;
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}
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}
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if ((mode & CS_MODE_MIPS32R6) != 0) {
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// DEBUG(dbgs() << "Trying Mips32r6_64r6 table (32-bit opcodes):\n");
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Result = decodeInstruction(DecoderTableMips32r6_64r632, instr, Insn,
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Address, MRI, mode);
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if (Result != MCDisassembler_Fail) {
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*Size = 4;
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return Result;
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}
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}
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// Calling the auto-generated decoder function.
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Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address, MRI, mode);
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if (Result != MCDisassembler_Fail) {
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*Size = 4;
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return Result;
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}
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return MCDisassembler_Fail;
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}
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bool Mips_getInstruction(csh ud, const uint8_t *code, size_t code_len, MCInst *instr,
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uint16_t *size, uint64_t address, void *info)
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{
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cs_struct *handle = (cs_struct *)(uintptr_t)ud;
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DecodeStatus status = MipsDisassembler_getInstruction(handle->mode, instr,
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code, code_len,
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size,
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address, MODE_IS_BIG_ENDIAN(handle->mode), (MCRegisterInfo *)info);
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return status == MCDisassembler_Success;
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}
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static DecodeStatus Mips64Disassembler_getInstruction(int mode, MCInst *instr,
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const uint8_t *code, size_t code_len,
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uint16_t *Size,
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uint64_t Address, bool isBigEndian, MCRegisterInfo *MRI)
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{
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uint32_t Insn;
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DecodeStatus Result;
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if (code_len < 4)
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// not enough data
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return MCDisassembler_Fail;
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if (instr->flat_insn->detail) {
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memset(instr->flat_insn->detail, 0, sizeof(cs_detail));
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}
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Result = readInstruction32((unsigned char*)code, &Insn, isBigEndian, false);
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if (Result == MCDisassembler_Fail)
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return MCDisassembler_Fail;
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if (instr->flat_insn->detail) {
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memset(instr->flat_insn->detail, 0, sizeof(cs_detail));
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}
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// Calling the auto-generated decoder function.
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Result = decodeInstruction(DecoderTableMips6432, instr, Insn, Address, MRI, mode);
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if (Result != MCDisassembler_Fail) {
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*Size = 4;
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return Result;
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}
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// If we fail to decode in Mips64 decoder space we can try in Mips32
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Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address, MRI, mode);
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if (Result != MCDisassembler_Fail) {
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*Size = 4;
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return Result;
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}
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return MCDisassembler_Fail;
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}
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bool Mips64_getInstruction(csh ud, const uint8_t *code, size_t code_len, MCInst *instr,
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uint16_t *size, uint64_t address, void *info)
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{
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cs_struct *handle = (cs_struct *)(uintptr_t)ud;
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DecodeStatus status = Mips64Disassembler_getInstruction(handle->mode, instr,
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code, code_len, size, address,
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MODE_IS_BIG_ENDIAN(handle->mode), (MCRegisterInfo *)info);
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return status == MCDisassembler_Success;
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}
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static unsigned getReg(const MCRegisterInfo *MRI, unsigned RC, unsigned RegNo)
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{
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//MipsDisassemblerBase *Dis = static_cast<const MipsDisassemblerBase*>(D);
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//return *(Dis->getRegInfo()->getRegClass(RC).begin() + RegNo);
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const MCRegisterClass *rc = MCRegisterInfo_getRegClass(MRI, RC);
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return rc->RegsBegin[RegNo];
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}
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static DecodeStatus DecodeINSVE_DF_4(MCInst *MI, uint32_t insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
typedef DecodeStatus (*DecodeFN)(MCInst *, unsigned, uint64_t, const MCRegisterInfo *);
|
|
// The size of the n field depends on the element size
|
|
// The register class also depends on this.
|
|
uint32_t tmp = fieldFromInstruction(insn, 17, 5);
|
|
unsigned NSize = 0;
|
|
DecodeFN RegDecoder = NULL;
|
|
|
|
if ((tmp & 0x18) == 0x00) { // INSVE_B
|
|
NSize = 4;
|
|
RegDecoder = DecodeMSA128BRegisterClass;
|
|
} else if ((tmp & 0x1c) == 0x10) { // INSVE_H
|
|
NSize = 3;
|
|
RegDecoder = DecodeMSA128HRegisterClass;
|
|
} else if ((tmp & 0x1e) == 0x18) { // INSVE_W
|
|
NSize = 2;
|
|
RegDecoder = DecodeMSA128WRegisterClass;
|
|
} else if ((tmp & 0x1f) == 0x1c) { // INSVE_D
|
|
NSize = 1;
|
|
RegDecoder = DecodeMSA128DRegisterClass;
|
|
} //else llvm_unreachable("Invalid encoding");
|
|
|
|
//assert(NSize != 0 && RegDecoder != nullptr);
|
|
if (NSize == 0 || RegDecoder == NULL)
|
|
return MCDisassembler_Fail;
|
|
|
|
if (RegDecoder == NULL)
|
|
return MCDisassembler_Fail;
|
|
|
|
// $wd
|
|
tmp = fieldFromInstruction(insn, 6, 5);
|
|
if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler_Fail)
|
|
return MCDisassembler_Fail;
|
|
|
|
// $wd_in
|
|
if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler_Fail)
|
|
return MCDisassembler_Fail;
|
|
|
|
// $n
|
|
tmp = fieldFromInstruction(insn, 16, NSize);
|
|
MCOperand_CreateImm0(MI, tmp);
|
|
|
|
// $ws
|
|
tmp = fieldFromInstruction(insn, 11, 5);
|
|
if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler_Fail)
|
|
return MCDisassembler_Fail;
|
|
|
|
// $n2
|
|
MCOperand_CreateImm0(MI, 0);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeAddiGroupBranch_4(MCInst *MI, uint32_t insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the ADDI instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b001000 sssss ttttt iiiiiiiiiiiiiiii
|
|
// BOVC if rs >= rt
|
|
// BEQZALC if rs == 0 && rt != 0
|
|
// BEQC if rs < rt && rs != 0
|
|
|
|
uint32_t Rs = fieldFromInstruction(insn, 21, 5);
|
|
uint32_t Rt = fieldFromInstruction(insn, 16, 5);
|
|
uint32_t Imm = (uint32_t)SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
|
|
if (Rs >= Rt) {
|
|
MCInst_setOpcode(MI, Mips_BOVC);
|
|
HasRs = true;
|
|
} else if (Rs != 0 && Rs < Rt) {
|
|
MCInst_setOpcode(MI, Mips_BEQC);
|
|
HasRs = true;
|
|
} else
|
|
MCInst_setOpcode(MI, Mips_BEQZALC);
|
|
|
|
if (HasRs)
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rs));
|
|
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rt));
|
|
MCOperand_CreateImm0(MI, Imm);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeDaddiGroupBranch_4(MCInst *MI, uint32_t insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the ADDI instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b011000 sssss ttttt iiiiiiiiiiiiiiii
|
|
// BNVC if rs >= rt
|
|
// BNEZALC if rs == 0 && rt != 0
|
|
// BNEC if rs < rt && rs != 0
|
|
|
|
uint32_t Rs = fieldFromInstruction(insn, 21, 5);
|
|
uint32_t Rt = fieldFromInstruction(insn, 16, 5);
|
|
uint32_t Imm = (uint32_t)SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
|
|
if (Rs >= Rt) {
|
|
MCInst_setOpcode(MI, Mips_BNVC);
|
|
HasRs = true;
|
|
} else if (Rs != 0 && Rs < Rt) {
|
|
MCInst_setOpcode(MI, Mips_BNEC);
|
|
HasRs = true;
|
|
} else
|
|
MCInst_setOpcode(MI, Mips_BNEZALC);
|
|
|
|
if (HasRs)
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rs));
|
|
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rt));
|
|
MCOperand_CreateImm0(MI, Imm);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBlezlGroupBranch_4(MCInst *MI, uint32_t insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BLEZL instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b010110 sssss ttttt iiiiiiiiiiiiiiii
|
|
// Invalid if rs == 0
|
|
// BLEZC if rs == 0 && rt != 0
|
|
// BGEZC if rs == rt && rt != 0
|
|
// BGEC if rs != rt && rs != 0 && rt != 0
|
|
|
|
uint32_t Rs = fieldFromInstruction(insn, 21, 5);
|
|
uint32_t Rt = fieldFromInstruction(insn, 16, 5);
|
|
uint32_t Imm = (uint32_t)SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
|
|
if (Rt == 0)
|
|
return MCDisassembler_Fail;
|
|
else if (Rs == 0)
|
|
MCInst_setOpcode(MI, Mips_BLEZC);
|
|
else if (Rs == Rt)
|
|
MCInst_setOpcode(MI, Mips_BGEZC);
|
|
else {
|
|
HasRs = true;
|
|
MCInst_setOpcode(MI, Mips_BGEC);
|
|
}
|
|
|
|
if (HasRs)
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rs));
|
|
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rt));
|
|
|
|
MCOperand_CreateImm0(MI, Imm);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBgtzlGroupBranch_4(MCInst *MI, uint32_t insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BGTZL instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b010111 sssss ttttt iiiiiiiiiiiiiiii
|
|
// Invalid if rs == 0
|
|
// BGTZC if rs == 0 && rt != 0
|
|
// BLTZC if rs == rt && rt != 0
|
|
// BLTC if rs != rt && rs != 0 && rt != 0
|
|
|
|
bool HasRs = false;
|
|
|
|
uint32_t Rs = fieldFromInstruction(insn, 21, 5);
|
|
uint32_t Rt = fieldFromInstruction(insn, 16, 5);
|
|
uint32_t Imm = (uint32_t)SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
|
|
if (Rt == 0)
|
|
return MCDisassembler_Fail;
|
|
else if (Rs == 0)
|
|
MCInst_setOpcode(MI, Mips_BGTZC);
|
|
else if (Rs == Rt)
|
|
MCInst_setOpcode(MI, Mips_BLTZC);
|
|
else {
|
|
MCInst_setOpcode(MI, Mips_BLTC);
|
|
HasRs = true;
|
|
}
|
|
|
|
if (HasRs)
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rs));
|
|
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rt));
|
|
MCOperand_CreateImm0(MI, Imm);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBgtzGroupBranch_4(MCInst *MI, uint32_t insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BGTZ instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b000111 sssss ttttt iiiiiiiiiiiiiiii
|
|
// BGTZ if rt == 0
|
|
// BGTZALC if rs == 0 && rt != 0
|
|
// BLTZALC if rs != 0 && rs == rt
|
|
// BLTUC if rs != 0 && rs != rt
|
|
|
|
uint32_t Rs = fieldFromInstruction(insn, 21, 5);
|
|
uint32_t Rt = fieldFromInstruction(insn, 16, 5);
|
|
uint32_t Imm = (uint32_t)SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
bool HasRt = false;
|
|
|
|
if (Rt == 0) {
|
|
MCInst_setOpcode(MI, Mips_BGTZ);
|
|
HasRs = true;
|
|
} else if (Rs == 0) {
|
|
MCInst_setOpcode(MI, Mips_BGTZALC);
|
|
HasRt = true;
|
|
} else if (Rs == Rt) {
|
|
MCInst_setOpcode(MI, Mips_BLTZALC);
|
|
HasRs = true;
|
|
} else {
|
|
MCInst_setOpcode(MI, Mips_BLTUC);
|
|
HasRs = true;
|
|
HasRt = true;
|
|
}
|
|
|
|
if (HasRs)
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rs));
|
|
|
|
if (HasRt)
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rt));
|
|
|
|
MCOperand_CreateImm0(MI, Imm);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBlezGroupBranch_4(MCInst *MI, uint32_t insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
|
|
// (otherwise we would have matched the BLEZL instruction from the earlier
|
|
// ISA's instead).
|
|
//
|
|
// We have:
|
|
// 0b000110 sssss ttttt iiiiiiiiiiiiiiii
|
|
// Invalid if rs == 0
|
|
// BLEZALC if rs == 0 && rt != 0
|
|
// BGEZALC if rs == rt && rt != 0
|
|
// BGEUC if rs != rt && rs != 0 && rt != 0
|
|
|
|
uint32_t Rs = fieldFromInstruction(insn, 21, 5);
|
|
uint32_t Rt = fieldFromInstruction(insn, 16, 5);
|
|
uint32_t Imm = (uint32_t)SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
|
|
bool HasRs = false;
|
|
|
|
if (Rt == 0)
|
|
return MCDisassembler_Fail;
|
|
else if (Rs == 0)
|
|
MCInst_setOpcode(MI, Mips_BLEZALC);
|
|
else if (Rs == Rt)
|
|
MCInst_setOpcode(MI, Mips_BGEZALC);
|
|
else {
|
|
HasRs = true;
|
|
MCInst_setOpcode(MI, Mips_BGEUC);
|
|
}
|
|
|
|
if (HasRs)
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rs));
|
|
|
|
MCOperand_CreateReg0(MI, getReg(Decoder, Mips_GPR32RegClassID, Rt));
|
|
|
|
MCOperand_CreateImm0(MI, Imm);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
return MCDisassembler_Fail;
|
|
}
|
|
|
|
static DecodeStatus DecodeGPR64RegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_GPR64RegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeGPR32RegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_GPR32RegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodePtrRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
if (Inst->csh->mode & CS_MODE_64)
|
|
return DecodeGPR64RegisterClass(Inst, RegNo, Address, Decoder);
|
|
|
|
return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
|
|
}
|
|
|
|
static DecodeStatus DecodeDSPRRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
|
|
}
|
|
|
|
static DecodeStatus DecodeFGR64RegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_FGR64RegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFGR32RegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_FGR32RegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCCRRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_CCRRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFCCRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 7)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_FCCRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCCRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 7)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_CCRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFGRCCRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_FGRCCRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMem(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(Insn & 0xffff, 16);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips_GPR32RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
if (MCInst_getOpcode(Inst) == Mips_SC){
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
}
|
|
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCachePref(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(Insn & 0xffff, 16);
|
|
unsigned Hint = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
MCOperand_CreateImm0(Inst, Hint);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128Mem(MCInst *Inst, unsigned Insn,
|
|
uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(fieldFromInstruction(Insn, 16, 10), 10);
|
|
unsigned Reg = fieldFromInstruction(Insn, 6, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 11, 5);
|
|
|
|
Reg = getReg(Decoder, Mips_MSA128BRegClassID, Reg);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
// MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
// The immediate field of an LD/ST instruction is scaled which means it must
|
|
// be multiplied (when decoding) by the size (in bytes) of the instructions'
|
|
// data format.
|
|
// .b - 1 byte
|
|
// .h - 2 bytes
|
|
// .w - 4 bytes
|
|
// .d - 8 bytes
|
|
switch(MCInst_getOpcode(Inst)) {
|
|
default:
|
|
//assert (0 && "Unexpected instruction");
|
|
return MCDisassembler_Fail;
|
|
break;
|
|
case Mips_LD_B:
|
|
case Mips_ST_B:
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
break;
|
|
case Mips_LD_H:
|
|
case Mips_ST_H:
|
|
MCOperand_CreateImm0(Inst, Offset * 2);
|
|
break;
|
|
case Mips_LD_W:
|
|
case Mips_ST_W:
|
|
MCOperand_CreateImm0(Inst, Offset * 4);
|
|
break;
|
|
case Mips_LD_D:
|
|
case Mips_ST_D:
|
|
MCOperand_CreateImm0(Inst, Offset * 8);
|
|
break;
|
|
}
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMemMMImm12(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(Insn & 0x0fff, 12);
|
|
unsigned Reg = fieldFromInstruction(Insn, 21, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 16, 5);
|
|
|
|
Reg = getReg(Decoder, Mips_GPR32RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
if (MCInst_getOpcode(Inst) == Mips_SC_MM)
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMemMMImm16(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(Insn & 0xffff, 16);
|
|
unsigned Reg = fieldFromInstruction(Insn, 21, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 16, 5);
|
|
|
|
Reg = getReg(Decoder, Mips_GPR32RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeFMem(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(Insn & 0xffff, 16);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips_FGR64RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCOP2Mem(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(Insn & 0xffff, 16);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips_COP2RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCOP3Mem(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Offset = SignExtend32(Insn & 0xffff, 16);
|
|
unsigned Reg = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Reg = getReg(Decoder, Mips_COP3RegClassID, Reg);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSpecial3LlSc(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int64_t Offset = SignExtend64((Insn >> 7) & 0x1ff, 9);
|
|
unsigned Rt = fieldFromInstruction(Insn, 16, 5);
|
|
unsigned Base = fieldFromInstruction(Insn, 21, 5);
|
|
|
|
Rt = getReg(Decoder, Mips_GPR32RegClassID, Rt);
|
|
Base = getReg(Decoder, Mips_GPR32RegClassID, Base);
|
|
|
|
if (MCInst_getOpcode(Inst) == Mips_SC_R6 ||
|
|
MCInst_getOpcode(Inst) == Mips_SCD_R6) {
|
|
MCOperand_CreateReg0(Inst, Rt);
|
|
}
|
|
|
|
MCOperand_CreateReg0(Inst, Rt);
|
|
MCOperand_CreateReg0(Inst, Base);
|
|
MCOperand_CreateImm0(Inst, Offset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeHWRegsRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// Currently only hardware register 29 is supported.
|
|
if (RegNo != 29)
|
|
return MCDisassembler_Fail;
|
|
|
|
MCOperand_CreateReg0(Inst, Mips_HWR29);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeAFGR64RegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 30 || RegNo % 2)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_AFGR64RegClassID, RegNo /2);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeACC64DSPRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo >= 4)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_ACC64DSPRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeHI32DSPRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo >= 4)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_HI32DSPRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeLO32DSPRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo >= 4)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_LO32DSPRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128BRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_MSA128BRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128HRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_MSA128HRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128WRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_MSA128WRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSA128DRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_MSA128DRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeMSACtrlRegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 7)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_MSACtrlRegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeCOP2RegisterClass(MCInst *Inst,
|
|
unsigned RegNo, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned Reg;
|
|
|
|
if (RegNo > 31)
|
|
return MCDisassembler_Fail;
|
|
|
|
Reg = getReg(Decoder, Mips_COP2RegClassID, RegNo);
|
|
MCOperand_CreateReg0(Inst, Reg);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTarget(MCInst *Inst,
|
|
unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
uint64_t TargetAddress = (SignExtend32(Offset, 16) * 4) + Address + 4;
|
|
MCOperand_CreateImm0(Inst, TargetAddress);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeJumpTarget(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
uint64_t TargetAddress = (fieldFromInstruction(Insn, 0, 26) << 2) | ((Address + 4) & ~0x0FFFFFFF);
|
|
MCOperand_CreateImm0(Inst, TargetAddress);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTarget21(MCInst *Inst,
|
|
unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int32_t BranchOffset = SignExtend32(Offset, 21) * 4;
|
|
|
|
MCOperand_CreateImm0(Inst, BranchOffset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTarget26(MCInst *Inst,
|
|
unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int32_t BranchOffset = SignExtend32(Offset, 26) * 4;
|
|
|
|
MCOperand_CreateImm0(Inst, BranchOffset);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeBranchTargetMM(MCInst *Inst,
|
|
unsigned Offset, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int32_t BranchOffset = SignExtend32(Offset, 16) * 2;
|
|
MCOperand_CreateImm0(Inst, BranchOffset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeJumpTargetMM(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 1;
|
|
MCOperand_CreateImm0(Inst, JumpOffset);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm16(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
MCOperand_CreateImm0(Inst, SignExtend32(Insn, 16));
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeLSAImm(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// We add one to the immediate field as it was encoded as 'imm - 1'.
|
|
MCOperand_CreateImm0(Inst, Insn + 1);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeInsSize(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
// First we need to grab the pos(lsb) from MCInst.
|
|
int Pos = (int)MCOperand_getImm(MCInst_getOperand(Inst, 2));
|
|
int Size = (int) Insn - Pos + 1;
|
|
MCOperand_CreateImm0(Inst, SignExtend32(Size, 16));
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeExtSize(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
int Size = (int) Insn + 1;
|
|
MCOperand_CreateImm0(Inst, SignExtend32(Size, 16));
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm19Lsl2(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
MCOperand_CreateImm0(Inst, SignExtend32(Insn, 19) * 4);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeSimm18Lsl3(MCInst *Inst,
|
|
unsigned Insn, uint64_t Address, const MCRegisterInfo *Decoder)
|
|
{
|
|
MCOperand_CreateImm0(Inst, SignExtend32(Insn, 18) * 8);
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
#endif
|